Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | #undef BLOCKMOVE |
2 | #define Z_WAKE | |
3 | #undef Z_EXT_CHARS_IN_BUFFER | |
1da177e4 LT |
4 | |
5 | /* | |
6 | * linux/drivers/char/cyclades.c | |
7 | * | |
8 | * This file contains the driver for the Cyclades async multiport | |
9 | * serial boards. | |
10 | * | |
11 | * Initially written by Randolph Bentson <bentson@grieg.seaslug.org>. | |
12 | * Modified and maintained by Marcio Saito <marcio@cyclades.com>. | |
13 | * Currently maintained by Cyclades team <async@cyclades.com>. | |
14 | * | |
15 | * For Technical support and installation problems, please send e-mail | |
16 | * to support@cyclades.com. | |
17 | * | |
18 | * Much of the design and some of the code came from serial.c | |
19 | * which was copyright (C) 1991, 1992 Linus Torvalds. It was | |
20 | * extensively rewritten by Theodore Ts'o, 8/16/92 -- 9/14/92, | |
21 | * and then fixed as suggested by Michael K. Johnson 12/12/92. | |
22 | * | |
23 | * This version supports shared IRQ's (only for PCI boards). | |
24 | * | |
25 | * $Log: cyclades.c,v $ | |
26 | * Prevent users from opening non-existing Z ports. | |
27 | * | |
28 | * Revision 2.3.2.8 2000/07/06 18:14:16 ivan | |
29 | * Fixed the PCI detection function to work properly on Alpha systems. | |
30 | * Implemented support for TIOCSERGETLSR ioctl. | |
31 | * Implemented full support for non-standard baud rates. | |
32 | * | |
33 | * Revision 2.3.2.7 2000/06/01 18:26:34 ivan | |
34 | * Request PLX I/O region, although driver doesn't use it, to avoid | |
35 | * problems with other drivers accessing it. | |
36 | * Removed count for on-board buffer characters in cy_chars_in_buffer | |
37 | * (Cyclades-Z only). | |
38 | * | |
39 | * Revision 2.3.2.6 2000/05/05 13:56:05 ivan | |
40 | * Driver now reports physical instead of virtual memory addresses. | |
41 | * Masks were added to some Cyclades-Z read accesses. | |
42 | * Implemented workaround for PLX9050 bug that would cause a system lockup | |
43 | * in certain systems, depending on the MMIO addresses allocated to the | |
44 | * board. | |
45 | * Changed the Tx interrupt programming in the CD1400 chips to boost up | |
46 | * performance (Cyclom-Y only). | |
47 | * Code is now compliant with the new module interface (module_[init|exit]). | |
48 | * Make use of the PCI helper functions to access PCI resources. | |
49 | * Did some code "housekeeping". | |
50 | * | |
51 | * Revision 2.3.2.5 2000/01/19 14:35:33 ivan | |
52 | * Fixed bug in cy_set_termios on CRTSCTS flag turnoff. | |
53 | * | |
54 | * Revision 2.3.2.4 2000/01/17 09:19:40 ivan | |
55 | * Fixed SMP locking in Cyclom-Y interrupt handler. | |
56 | * | |
57 | * Revision 2.3.2.3 1999/12/28 12:11:39 ivan | |
58 | * Added a new cyclades_card field called nports to allow the driver to | |
59 | * know the exact number of ports found by the Z firmware after its load; | |
60 | * RX buffer contention prevention logic on interrupt op mode revisited | |
61 | * (Cyclades-Z only); | |
62 | * Revisited printk's for Z debug; | |
63 | * Driver now makes sure that the constant SERIAL_XMIT_SIZE is defined; | |
64 | * | |
65 | * Revision 2.3.2.2 1999/10/01 11:27:43 ivan | |
66 | * Fixed bug in cyz_poll that would make all ports but port 0 | |
67 | * unable to transmit/receive data (Cyclades-Z only); | |
68 | * Implemented logic to prevent the RX buffer from being stuck with data | |
69 | * due to a driver / firmware race condition in interrupt op mode | |
70 | * (Cyclades-Z only); | |
71 | * Fixed bug in block_til_ready logic that would lead to a system crash; | |
72 | * Revisited cy_close spinlock usage; | |
73 | * | |
74 | * Revision 2.3.2.1 1999/09/28 11:01:22 ivan | |
75 | * Revisited CONFIG_PCI conditional compilation for PCI board support; | |
76 | * Implemented TIOCGICOUNT and TIOCMIWAIT ioctl support; | |
77 | * _Major_ cleanup on the Cyclades-Z interrupt support code / logic; | |
78 | * Removed CTS handling from the driver -- this is now completely handled | |
79 | * by the firmware (Cyclades-Z only); | |
80 | * Flush RX on-board buffers on a port open (Cyclades-Z only); | |
81 | * Fixed handling of ASYNC_SPD_* TTY flags; | |
82 | * Module unload now unmaps all memory area allocated by ioremap; | |
83 | * | |
84 | * Revision 2.3.1.1 1999/07/15 16:45:53 ivan | |
85 | * Removed CY_PROC conditional compilation; | |
86 | * Implemented SMP-awareness for the driver; | |
87 | * Implemented a new ISA IRQ autoprobe that uses the irq_probe_[on|off] | |
88 | * functions; | |
89 | * The driver now accepts memory addresses (maddr=0xMMMMM) and IRQs | |
90 | * (irq=NN) as parameters (only for ISA boards); | |
91 | * Fixed bug in set_line_char that would prevent the Cyclades-Z | |
92 | * ports from being configured at speeds above 115.2Kbps; | |
93 | * Fixed bug in cy_set_termios that would prevent XON/XOFF flow control | |
94 | * switching from working properly; | |
95 | * The driver now only prints IRQ info for the Cyclades-Z if it's | |
96 | * configured to work in interrupt mode; | |
97 | * | |
98 | * Revision 2.2.2.3 1999/06/28 11:13:29 ivan | |
99 | * Added support for interrupt mode operation for the Z cards; | |
100 | * Removed the driver inactivity control for the Z; | |
101 | * Added a missing MOD_DEC_USE_COUNT in the cy_open function for when | |
102 | * the Z firmware is not loaded yet; | |
103 | * Replaced the "manual" Z Tx flush buffer by a call to a FW command of | |
104 | * same functionality; | |
105 | * Implemented workaround for IRQ setting loss on the PCI configuration | |
106 | * registers after a PCI bridge EEPROM reload (affects PLX9060 only); | |
107 | * | |
108 | * Revision 2.2.2.2 1999/05/14 17:18:15 ivan | |
109 | * /proc entry location changed to /proc/tty/driver/cyclades; | |
110 | * Added support to shared IRQ's (only for PCI boards); | |
111 | * Added support for Cobalt Qube2 systems; | |
112 | * IRQ [de]allocation scheme revisited; | |
113 | * BREAK implementation changed in order to make use of the 'break_ctl' | |
114 | * TTY facility; | |
115 | * Fixed typo in TTY structure field 'driver_name'; | |
116 | * Included a PCI bridge reset and EEPROM reload in the board | |
117 | * initialization code (for both Y and Z series). | |
118 | * | |
119 | * Revision 2.2.2.1 1999/04/08 16:17:43 ivan | |
120 | * Fixed a bug in cy_wait_until_sent that was preventing the port to be | |
121 | * closed properly after a SIGINT; | |
122 | * Module usage counter scheme revisited; | |
123 | * Added support to the upcoming Y PCI boards (i.e., support to additional | |
124 | * PCI Device ID's). | |
125 | * | |
126 | * Revision 2.2.1.10 1999/01/20 16:14:29 ivan | |
127 | * Removed all unnecessary page-alignement operations in ioremap calls | |
128 | * (ioremap is currently safe for these operations). | |
129 | * | |
130 | * Revision 2.2.1.9 1998/12/30 18:18:30 ivan | |
131 | * Changed access to PLX PCI bridge registers from I/O to MMIO, in | |
132 | * order to make PLX9050-based boards work with certain motherboards. | |
133 | * | |
134 | * Revision 2.2.1.8 1998/11/13 12:46:20 ivan | |
135 | * cy_close function now resets (correctly) the tty->closing flag; | |
136 | * JIFFIES_DIFF macro fixed. | |
137 | * | |
138 | * Revision 2.2.1.7 1998/09/03 12:07:28 ivan | |
139 | * Fixed bug in cy_close function, which was not informing HW of | |
140 | * which port should have the reception disabled before doing so; | |
141 | * fixed Cyclom-8YoP hardware detection bug. | |
142 | * | |
143 | * Revision 2.2.1.6 1998/08/20 17:15:39 ivan | |
144 | * Fixed bug in cy_close function, which causes malfunction | |
145 | * of one of the first 4 ports when a higher port is closed | |
146 | * (Cyclom-Y only). | |
147 | * | |
148 | * Revision 2.2.1.5 1998/08/10 18:10:28 ivan | |
149 | * Fixed Cyclom-4Yo hardware detection bug. | |
150 | * | |
151 | * Revision 2.2.1.4 1998/08/04 11:02:50 ivan | |
152 | * /proc/cyclades implementation with great collaboration of | |
153 | * Marc Lewis <marc@blarg.net>; | |
154 | * cyy_interrupt was changed to avoid occurrence of kernel oopses | |
155 | * during PPP operation. | |
156 | * | |
157 | * Revision 2.2.1.3 1998/06/01 12:09:10 ivan | |
158 | * General code review in order to comply with 2.1 kernel standards; | |
159 | * data loss prevention for slow devices revisited (cy_wait_until_sent | |
160 | * was created); | |
161 | * removed conditional compilation for new/old PCI structure support | |
162 | * (now the driver only supports the new PCI structure). | |
163 | * | |
164 | * Revision 2.2.1.1 1998/03/19 16:43:12 ivan | |
165 | * added conditional compilation for new/old PCI structure support; | |
166 | * removed kernel series (2.0.x / 2.1.x) conditional compilation. | |
167 | * | |
168 | * Revision 2.1.1.3 1998/03/16 18:01:12 ivan | |
169 | * cleaned up the data loss fix; | |
170 | * fixed XON/XOFF handling once more (Cyclades-Z); | |
171 | * general review of the driver routines; | |
172 | * introduction of a mechanism to prevent data loss with slow | |
173 | * printers, by forcing a delay before closing the port. | |
174 | * | |
175 | * Revision 2.1.1.2 1998/02/17 16:50:00 ivan | |
176 | * fixed detection/handling of new CD1400 in Ye boards; | |
177 | * fixed XON/XOFF handling (Cyclades-Z); | |
178 | * fixed data loss caused by a premature port close; | |
179 | * introduction of a flag that holds the CD1400 version ID per port | |
180 | * (used by the CYGETCD1400VER new ioctl). | |
181 | * | |
182 | * Revision 2.1.1.1 1997/12/03 17:31:19 ivan | |
183 | * Code review for the module cleanup routine; | |
184 | * fixed RTS and DTR status report for new CD1400's in get_modem_info; | |
185 | * includes anonymous changes regarding signal_pending. | |
186 | * | |
187 | * Revision 2.1 1997/11/01 17:42:41 ivan | |
188 | * Changes in the driver to support Alpha systems (except 8Zo V_1); | |
189 | * BREAK fix for the Cyclades-Z boards; | |
190 | * driver inactivity control by FW implemented; | |
191 | * introduction of flag that allows driver to take advantage of | |
192 | * a special CD1400 feature related to HW flow control; | |
193 | * added support for the CD1400 rev. J (Cyclom-Y boards); | |
194 | * introduction of ioctls to: | |
195 | * - control the rtsdtr_inv flag (Cyclom-Y); | |
196 | * - control the rflow flag (Cyclom-Y); | |
197 | * - adjust the polling interval (Cyclades-Z); | |
198 | * | |
199 | * Revision 1.36.4.33 1997/06/27 19:00:00 ivan | |
200 | * Fixes related to kernel version conditional | |
201 | * compilation. | |
202 | * | |
203 | * Revision 1.36.4.32 1997/06/14 19:30:00 ivan | |
204 | * Compatibility issues between kernels 2.0.x and | |
205 | * 2.1.x (mainly related to clear_bit function). | |
206 | * | |
207 | * Revision 1.36.4.31 1997/06/03 15:30:00 ivan | |
208 | * Changes to define the memory window according to the | |
209 | * board type. | |
210 | * | |
211 | * Revision 1.36.4.30 1997/05/16 15:30:00 daniel | |
212 | * Changes to support new cycladesZ boards. | |
213 | * | |
214 | * Revision 1.36.4.29 1997/05/12 11:30:00 daniel | |
215 | * Merge of Bentson's and Daniel's version 1.36.4.28. | |
216 | * Corrects bug in cy_detect_pci: check if there are more | |
217 | * ports than the number of static structs allocated. | |
218 | * Warning message during initialization if this driver is | |
219 | * used with the new generation of cycladesZ boards. Those | |
220 | * will be supported only in next release of the driver. | |
221 | * Corrects bug in cy_detect_pci and cy_detect_isa that | |
222 | * returned wrong number of VALID boards, when a cyclomY | |
223 | * was found with no serial modules connected. | |
224 | * Changes to use current (2.1.x) kernel subroutine names | |
225 | * and created macros for compilation with 2.0.x kernel, | |
226 | * instead of the other way around. | |
227 | * | |
228 | * Revision 1.36.4.28 1997/05/?? ??:00:00 bentson | |
229 | * Change queue_task_irq_off to queue_task_irq. | |
230 | * The inline function queue_task_irq_off (tqueue.h) | |
231 | * was removed from latest releases of 2.1.x kernel. | |
232 | * Use of macro __init to mark the initialization | |
233 | * routines, so memory can be reused. | |
234 | * Also incorporate implementation of critical region | |
235 | * in function cleanup_module() created by anonymous | |
236 | * linuxer. | |
237 | * | |
238 | * Revision 1.36.4.28 1997/04/25 16:00:00 daniel | |
239 | * Change to support new firmware that solves DCD problem: | |
240 | * application could fail to receive SIGHUP signal when DCD | |
241 | * varying too fast. | |
242 | * | |
243 | * Revision 1.36.4.27 1997/03/26 10:30:00 daniel | |
244 | * Changed for support linux versions 2.1.X. | |
245 | * Backward compatible with linux versions 2.0.X. | |
246 | * Corrected illegal use of filler field in | |
247 | * CH_CTRL struct. | |
248 | * Deleted some debug messages. | |
249 | * | |
250 | * Revision 1.36.4.26 1997/02/27 12:00:00 daniel | |
251 | * Included check for NULL tty pointer in cyz_poll. | |
252 | * | |
253 | * Revision 1.36.4.25 1997/02/26 16:28:30 bentson | |
254 | * Bill Foster at Blarg! Online services noticed that | |
255 | * some of the switch elements of -Z modem control | |
256 | * lacked a closing "break;" | |
257 | * | |
258 | * Revision 1.36.4.24 1997/02/24 11:00:00 daniel | |
259 | * Changed low water threshold for buffer xmit_buf | |
260 | * | |
261 | * Revision 1.36.4.23 1996/12/02 21:50:16 bentson | |
262 | * Marcio provided fix to modem status fetch for -Z | |
263 | * | |
264 | * Revision 1.36.4.22 1996/10/28 22:41:17 bentson | |
265 | * improve mapping of -Z control page (thanks to Steve | |
266 | * Price <stevep@fa.tdktca.com> for help on this) | |
267 | * | |
268 | * Revision 1.36.4.21 1996/09/10 17:00:10 bentson | |
269 | * shift from CPU-bound to memcopy in cyz_polling operation | |
270 | * | |
271 | * Revision 1.36.4.20 1996/09/09 18:30:32 Bentson | |
272 | * Added support to set and report higher speeds. | |
273 | * | |
274 | * Revision 1.36.4.19c 1996/08/09 10:00:00 Marcio Saito | |
275 | * Some fixes in the HW flow control for the BETA release. | |
276 | * Don't try to register the IRQ. | |
277 | * | |
278 | * Revision 1.36.4.19 1996/08/08 16:23:18 Bentson | |
279 | * make sure "cyc" appears in all kernel messages; all soft interrupts | |
280 | * handled by same routine; recognize out-of-band reception; comment | |
281 | * out some diagnostic messages; leave RTS/CTS flow control to hardware; | |
33430dc5 | 282 | * fix race condition in -Z buffer management; only -Y needs to explicitly |
1da177e4 LT |
283 | * flush chars; tidy up some startup messages; |
284 | * | |
285 | * Revision 1.36.4.18 1996/07/25 18:57:31 bentson | |
286 | * shift MOD_INC_USE_COUNT location to match | |
287 | * serial.c; purge some diagnostic messages; | |
288 | * | |
289 | * Revision 1.36.4.17 1996/07/25 18:01:08 bentson | |
290 | * enable modem status messages and fetch & process them; note | |
291 | * time of last activity type for each port; set_line_char now | |
292 | * supports more than line 0 and treats 0 baud correctly; | |
293 | * get_modem_info senses rs_status; | |
294 | * | |
295 | * Revision 1.36.4.16 1996/07/20 08:43:15 bentson | |
296 | * barely works--now's time to turn on | |
297 | * more features 'til it breaks | |
298 | * | |
299 | * Revision 1.36.4.15 1996/07/19 22:30:06 bentson | |
300 | * check more -Z board status; shorten boot message | |
301 | * | |
302 | * Revision 1.36.4.14 1996/07/19 22:20:37 bentson | |
303 | * fix reference to ch_ctrl in startup; verify return | |
304 | * values from cyz_issue_cmd and cyz_update_channel; | |
305 | * more stuff to get modem control correct; | |
306 | * | |
307 | * Revision 1.36.4.13 1996/07/11 19:53:33 bentson | |
308 | * more -Z stuff folded in; re-order changes to put -Z stuff | |
309 | * after -Y stuff (to make changes clearer) | |
310 | * | |
311 | * Revision 1.36.4.12 1996/07/11 15:40:55 bentson | |
312 | * Add code to poll Cyclades-Z. Add code to get & set RS-232 control. | |
313 | * Add code to send break. Clear firmware ID word at startup (so | |
314 | * that other code won't talk to inactive board). | |
315 | * | |
316 | * Revision 1.36.4.11 1996/07/09 05:28:29 bentson | |
317 | * add code for -Z in set_line_char | |
318 | * | |
319 | * Revision 1.36.4.10 1996/07/08 19:28:37 bentson | |
320 | * fold more -Z stuff (or in some cases, error messages) | |
321 | * into driver; add text to "don't know what to do" messages. | |
322 | * | |
323 | * Revision 1.36.4.9 1996/07/08 18:38:38 bentson | |
324 | * moved compile-time flags near top of file; cosmetic changes | |
325 | * to narrow text (to allow 2-up printing); changed many declarations | |
326 | * to "static" to limit external symbols; shuffled code order to | |
327 | * coalesce -Y and -Z specific code, also to put internal functions | |
328 | * in order of tty_driver structure; added code to recognize -Z | |
329 | * ports (and for moment, do nothing or report error); add cy_startup | |
330 | * to parse boot command line for extra base addresses for ISA probes; | |
331 | * | |
332 | * Revision 1.36.4.8 1996/06/25 17:40:19 bentson | |
333 | * reorder some code, fix types of some vars (int vs. long), | |
334 | * add cy_setup to support user declared ISA addresses | |
335 | * | |
336 | * Revision 1.36.4.7 1996/06/21 23:06:18 bentson | |
337 | * dump ioctl based firmware load (it's now a user level | |
338 | * program); ensure uninitialzed ports cannot be used | |
339 | * | |
340 | * Revision 1.36.4.6 1996/06/20 23:17:19 bentson | |
341 | * rename vars and restructure some code | |
342 | * | |
343 | * Revision 1.36.4.5 1996/06/14 15:09:44 bentson | |
344 | * get right status back after boot load | |
345 | * | |
346 | * Revision 1.36.4.4 1996/06/13 19:51:44 bentson | |
347 | * successfully loads firmware | |
348 | * | |
349 | * Revision 1.36.4.3 1996/06/13 06:08:33 bentson | |
350 | * add more of the code for the boot/load ioctls | |
351 | * | |
352 | * Revision 1.36.4.2 1996/06/11 21:00:51 bentson | |
353 | * start to add Z functionality--starting with ioctl | |
354 | * for loading firmware | |
355 | * | |
356 | * Revision 1.36.4.1 1996/06/10 18:03:02 bentson | |
357 | * added code to recognize Z/PCI card at initialization; report | |
358 | * presence, but card is not initialized (because firmware needs | |
359 | * to be loaded) | |
360 | * | |
361 | * Revision 1.36.3.8 1996/06/07 16:29:00 bentson | |
362 | * starting minor number at zero; added missing verify_area | |
363 | * as noted by Heiko Eissfeldt <heiko@colossus.escape.de> | |
364 | * | |
365 | * Revision 1.36.3.7 1996/04/19 21:06:18 bentson | |
366 | * remove unneeded boot message & fix CLOCAL hardware flow | |
367 | * control (Miquel van Smoorenburg <miquels@Q.cistron.nl>); | |
368 | * remove unused diagnostic statements; minor 0 is first; | |
369 | * | |
370 | * Revision 1.36.3.6 1996/03/13 13:21:17 marcio | |
371 | * The kernel function vremap (available only in later 1.3.xx kernels) | |
372 | * allows the access to memory addresses above the RAM. This revision | |
373 | * of the driver supports PCI boards below 1Mb (device id 0x100) and | |
374 | * above 1Mb (device id 0x101). | |
375 | * | |
376 | * Revision 1.36.3.5 1996/03/07 15:20:17 bentson | |
377 | * Some global changes to interrupt handling spilled into | |
378 | * this driver--mostly unused arguments in system function | |
379 | * calls. Also added change by Marcio Saito which should | |
380 | * reduce lost interrupts at startup by fast processors. | |
381 | * | |
382 | * Revision 1.36.3.4 1995/11/13 20:45:10 bentson | |
383 | * Changes by Corey Minyard <minyard@wf-rch.cirr.com> distributed | |
384 | * in 1.3.41 kernel to remove a possible race condition, extend | |
385 | * some error messages, and let the driver run as a loadable module | |
386 | * Change by Alan Wendt <alan@ez0.ezlink.com> to remove a | |
387 | * possible race condition. | |
388 | * Change by Marcio Saito <marcio@cyclades.com> to fix PCI addressing. | |
389 | * | |
390 | * Revision 1.36.3.3 1995/11/13 19:44:48 bentson | |
391 | * Changes by Linus Torvalds in 1.3.33 kernel distribution | |
392 | * required due to reordering of driver initialization. | |
393 | * Drivers are now initialized *after* memory management. | |
394 | * | |
395 | * Revision 1.36.3.2 1995/09/08 22:07:14 bentson | |
396 | * remove printk from ISR; fix typo | |
397 | * | |
398 | * Revision 1.36.3.1 1995/09/01 12:00:42 marcio | |
399 | * Minor fixes in the PCI board support. PCI function calls in | |
400 | * conditional compilation (CONFIG_PCI). Thanks to Jim Duncan | |
401 | * <duncan@okay.com>. "bad serial count" message removed. | |
402 | * | |
403 | * Revision 1.36.3 1995/08/22 09:19:42 marcio | |
404 | * Cyclom-Y/PCI support added. Changes in the cy_init routine and | |
405 | * board initialization. Changes in the boot messages. The driver | |
406 | * supports up to 4 boards and 64 ports by default. | |
407 | * | |
408 | * Revision 1.36.1.4 1995/03/29 06:14:14 bentson | |
409 | * disambiguate between Cyclom-16Y and Cyclom-32Ye; | |
410 | * | |
411 | * Revision 1.36.1.3 1995/03/23 22:15:35 bentson | |
412 | * add missing break in modem control block in ioctl switch statement | |
413 | * (discovered by Michael Edward Chastain <mec@jobe.shell.portal.com>); | |
414 | * | |
415 | * Revision 1.36.1.2 1995/03/22 19:16:22 bentson | |
416 | * make sure CTS flow control is set as soon as possible (thanks | |
417 | * to note from David Lambert <lambert@chesapeake.rps.slb.com>); | |
418 | * | |
419 | * Revision 1.36.1.1 1995/03/13 15:44:43 bentson | |
420 | * initialize defaults for receive threshold and stale data timeout; | |
421 | * cosmetic changes; | |
422 | * | |
423 | * Revision 1.36 1995/03/10 23:33:53 bentson | |
424 | * added support of chips 4-7 in 32 port Cyclom-Ye; | |
425 | * fix cy_interrupt pointer dereference problem | |
426 | * (Joe Portman <baron@aa.net>); | |
427 | * give better error response if open is attempted on non-existent port | |
428 | * (Zachariah Vaum <jchryslr@netcom.com>); | |
429 | * correct command timeout (Kenneth Lerman <lerman@@seltd.newnet.com>); | |
430 | * conditional compilation for -16Y on systems with fast, noisy bus; | |
431 | * comment out diagnostic print function; | |
432 | * cleaned up table of base addresses; | |
433 | * set receiver time-out period register to correct value, | |
434 | * set receive threshold to better default values, | |
435 | * set chip timer to more accurate 200 Hz ticking, | |
436 | * add code to monitor and modify receive parameters | |
437 | * (Rik Faith <faith@cs.unc.edu> Nick Simicich | |
438 | * <njs@scifi.emi.net>); | |
439 | * | |
440 | * Revision 1.35 1994/12/16 13:54:18 steffen | |
441 | * additional patch by Marcio Saito for board detection | |
442 | * Accidently left out in 1.34 | |
443 | * | |
444 | * Revision 1.34 1994/12/10 12:37:12 steffen | |
445 | * This is the corrected version as suggested by Marcio Saito | |
446 | * | |
447 | * Revision 1.33 1994/12/01 22:41:18 bentson | |
448 | * add hooks to support more high speeds directly; add tytso | |
449 | * patch regarding CLOCAL wakeups | |
450 | * | |
451 | * Revision 1.32 1994/11/23 19:50:04 bentson | |
452 | * allow direct kernel control of higher signalling rates; | |
453 | * look for cards at additional locations | |
454 | * | |
455 | * Revision 1.31 1994/11/16 04:33:28 bentson | |
456 | * ANOTHER fix from Corey Minyard, minyard@wf-rch.cirr.com-- | |
457 | * a problem in chars_in_buffer has been resolved by some | |
458 | * small changes; this should yield smoother output | |
459 | * | |
460 | * Revision 1.30 1994/11/16 04:28:05 bentson | |
461 | * Fix from Corey Minyard, Internet: minyard@metronet.com, | |
462 | * UUCP: minyard@wf-rch.cirr.com, WORK: minyardbnr.ca, to | |
463 | * cy_hangup that appears to clear up much (all?) of the | |
464 | * DTR glitches; also he's added/cleaned-up diagnostic messages | |
465 | * | |
466 | * Revision 1.29 1994/11/16 04:16:07 bentson | |
467 | * add change proposed by Ralph Sims, ralphs@halcyon.com, to | |
468 | * operate higher speeds in same way as other serial ports; | |
469 | * add more serial ports (for up to two 16-port muxes). | |
470 | * | |
471 | * Revision 1.28 1994/11/04 00:13:16 root | |
472 | * turn off diagnostic messages | |
473 | * | |
474 | * Revision 1.27 1994/11/03 23:46:37 root | |
475 | * bunch of changes to bring driver into greater conformance | |
476 | * with the serial.c driver (looking for missed fixes) | |
477 | * | |
478 | * Revision 1.26 1994/11/03 22:40:36 root | |
479 | * automatic interrupt probing fixed. | |
480 | * | |
481 | * Revision 1.25 1994/11/03 20:17:02 root | |
482 | * start to implement auto-irq | |
483 | * | |
484 | * Revision 1.24 1994/11/03 18:01:55 root | |
485 | * still working on modem signals--trying not to drop DTR | |
486 | * during the getty/login processes | |
487 | * | |
488 | * Revision 1.23 1994/11/03 17:51:36 root | |
489 | * extend baud rate support; set receive threshold as function | |
490 | * of baud rate; fix some problems with RTS/CTS; | |
491 | * | |
492 | * Revision 1.22 1994/11/02 18:05:35 root | |
493 | * changed arguments to udelay to type long to get | |
494 | * delays to be of correct duration | |
495 | * | |
496 | * Revision 1.21 1994/11/02 17:37:30 root | |
497 | * employ udelay (after calibrating loops_per_second earlier | |
498 | * in init/main.c) instead of using home-grown delay routines | |
499 | * | |
500 | * Revision 1.20 1994/11/02 03:11:38 root | |
501 | * cy_chars_in_buffer forces a return value of 0 to let | |
502 | * login work (don't know why it does); some functions | |
503 | * that were returning EFAULT, now executes the code; | |
504 | * more work on deciding when to disable xmit interrupts; | |
505 | * | |
506 | * Revision 1.19 1994/11/01 20:10:14 root | |
507 | * define routine to start transmission interrupts (by enabling | |
508 | * transmit interrupts); directly enable/disable modem interrupts; | |
509 | * | |
510 | * Revision 1.18 1994/11/01 18:40:45 bentson | |
511 | * Don't always enable transmit interrupts in startup; interrupt on | |
512 | * TxMpty instead of TxRdy to help characters get out before shutdown; | |
513 | * restructure xmit interrupt to check for chars first and quit if | |
514 | * none are ready to go; modem status (MXVRx) is upright, _not_ inverted | |
515 | * (to my view); | |
516 | * | |
517 | * Revision 1.17 1994/10/30 04:39:45 bentson | |
518 | * rename serial_driver and callout_driver to cy_serial_driver and | |
519 | * cy_callout_driver to avoid linkage interference; initialize | |
520 | * info->type to PORT_CIRRUS; ruggedize paranoia test; elide ->port | |
521 | * from cyclades_port structure; add paranoia check to cy_close; | |
522 | * | |
523 | * Revision 1.16 1994/10/30 01:14:33 bentson | |
524 | * change major numbers; add some _early_ return statements; | |
525 | * | |
526 | * Revision 1.15 1994/10/29 06:43:15 bentson | |
527 | * final tidying up for clean compile; enable some error reporting | |
528 | * | |
529 | * Revision 1.14 1994/10/28 20:30:22 Bentson | |
530 | * lots of changes to drag the driver towards the new tty_io | |
531 | * structures and operation. not expected to work, but may | |
532 | * compile cleanly. | |
533 | * | |
534 | * Revision 1.13 1994/07/21 23:08:57 Bentson | |
535 | * add some diagnostic cruft; support 24 lines (for testing | |
536 | * both -8Y and -16Y cards; be more thorough in servicing all | |
537 | * chips during interrupt; add "volatile" a few places to | |
538 | * circumvent compiler optimizations; fix base & offset | |
539 | * computations in block_til_ready (was causing chip 0 to | |
540 | * stop operation) | |
541 | * | |
542 | * Revision 1.12 1994/07/19 16:42:11 Bentson | |
543 | * add some hackery for kernel version 1.1.8; expand | |
544 | * error messages; refine timing for delay loops and | |
545 | * declare loop params volatile | |
546 | * | |
547 | * Revision 1.11 1994/06/11 21:53:10 bentson | |
548 | * get use of save_car right in transmit interrupt service | |
549 | * | |
550 | * Revision 1.10.1.1 1994/06/11 21:31:18 bentson | |
551 | * add some diagnostic printing; try to fix save_car stuff | |
552 | * | |
553 | * Revision 1.10 1994/06/11 20:36:08 bentson | |
554 | * clean up compiler warnings | |
555 | * | |
556 | * Revision 1.9 1994/06/11 19:42:46 bentson | |
557 | * added a bunch of code to support modem signalling | |
558 | * | |
559 | * Revision 1.8 1994/06/11 17:57:07 bentson | |
560 | * recognize break & parity error | |
561 | * | |
562 | * Revision 1.7 1994/06/05 05:51:34 bentson | |
563 | * Reorder baud table to be monotonic; add cli to CP; discard | |
564 | * incoming characters and status if the line isn't open; start to | |
565 | * fold code into cy_throttle; start to port get_serial_info, | |
566 | * set_serial_info, get_modem_info, set_modem_info, and send_break | |
567 | * from serial.c; expand cy_ioctl; relocate and expand config_setup; | |
568 | * get flow control characters from tty struct; invalidate ports w/o | |
569 | * hardware; | |
570 | * | |
571 | * Revision 1.6 1994/05/31 18:42:21 bentson | |
572 | * add a loop-breaker in the interrupt service routine; | |
573 | * note when port is initialized so that it can be shut | |
574 | * down under the right conditions; receive works without | |
575 | * any obvious errors | |
576 | * | |
577 | * Revision 1.5 1994/05/30 00:55:02 bentson | |
578 | * transmit works without obvious errors | |
579 | * | |
580 | * Revision 1.4 1994/05/27 18:46:27 bentson | |
581 | * incorporated more code from lib_y.c; can now print short | |
582 | * strings under interrupt control to port zero; seems to | |
583 | * select ports/channels/lines correctly | |
584 | * | |
585 | * Revision 1.3 1994/05/25 22:12:44 bentson | |
586 | * shifting from multi-port on a card to proper multiplexor | |
587 | * data structures; added skeletons of most routines | |
588 | * | |
589 | * Revision 1.2 1994/05/19 13:21:43 bentson | |
590 | * start to crib from other sources | |
591 | * | |
592 | */ | |
593 | ||
096dcfce JS |
594 | #define CY_VERSION "2.4" |
595 | ||
1da177e4 LT |
596 | /* If you need to install more boards than NR_CARDS, change the constant |
597 | in the definition below. No other change is necessary to support up to | |
598 | eight boards. Beyond that you'll have to extend cy_isa_addresses. */ | |
599 | ||
02f1175c | 600 | #define NR_CARDS 4 |
1da177e4 LT |
601 | |
602 | /* | |
603 | If the total number of ports is larger than NR_PORTS, change this | |
604 | constant in the definition below. No other change is necessary to | |
605 | support more boards/ports. */ | |
606 | ||
02f1175c | 607 | #define NR_PORTS 256 |
1da177e4 LT |
608 | |
609 | #define ZE_V1_NPORTS 64 | |
610 | #define ZO_V1 0 | |
611 | #define ZO_V2 1 | |
612 | #define ZE_V1 2 | |
613 | ||
614 | #define SERIAL_PARANOIA_CHECK | |
615 | #undef CY_DEBUG_OPEN | |
616 | #undef CY_DEBUG_THROTTLE | |
617 | #undef CY_DEBUG_OTHER | |
618 | #undef CY_DEBUG_IO | |
619 | #undef CY_DEBUG_COUNT | |
620 | #undef CY_DEBUG_DTR | |
621 | #undef CY_DEBUG_WAIT_UNTIL_SENT | |
622 | #undef CY_DEBUG_INTERRUPTS | |
623 | #undef CY_16Y_HACK | |
624 | #undef CY_ENABLE_MONITORING | |
625 | #undef CY_PCI_DEBUG | |
626 | ||
627 | #if 0 | |
096dcfce | 628 | #define PAUSE __asm__("nop") |
1da177e4 | 629 | #else |
096dcfce | 630 | #define PAUSE do {} while (0) |
1da177e4 LT |
631 | #endif |
632 | ||
633 | /* | |
634 | * Include section | |
635 | */ | |
1da177e4 LT |
636 | #include <linux/module.h> |
637 | #include <linux/errno.h> | |
638 | #include <linux/signal.h> | |
639 | #include <linux/sched.h> | |
640 | #include <linux/timer.h> | |
641 | #include <linux/interrupt.h> | |
642 | #include <linux/tty.h> | |
33f0f88f | 643 | #include <linux/tty_flip.h> |
1da177e4 LT |
644 | #include <linux/serial.h> |
645 | #include <linux/major.h> | |
646 | #include <linux/string.h> | |
647 | #include <linux/fcntl.h> | |
648 | #include <linux/ptrace.h> | |
649 | #include <linux/cyclades.h> | |
650 | #include <linux/mm.h> | |
651 | #include <linux/ioport.h> | |
652 | #include <linux/init.h> | |
653 | #include <linux/delay.h> | |
654 | #include <linux/spinlock.h> | |
655 | #include <linux/bitops.h> | |
656 | ||
657 | #include <asm/system.h> | |
658 | #include <asm/io.h> | |
659 | #include <asm/irq.h> | |
660 | #include <asm/uaccess.h> | |
661 | ||
662 | #define CY_LOCK(info,flags) \ | |
663 | do { \ | |
664 | spin_lock_irqsave(&cy_card[info->card].card_lock, flags); \ | |
665 | } while (0) | |
02f1175c | 666 | |
1da177e4 LT |
667 | #define CY_UNLOCK(info,flags) \ |
668 | do { \ | |
669 | spin_unlock_irqrestore(&cy_card[info->card].card_lock, flags); \ | |
670 | } while (0) | |
671 | ||
672 | #include <linux/types.h> | |
673 | #include <linux/kernel.h> | |
674 | #include <linux/pci.h> | |
675 | ||
676 | #include <linux/stat.h> | |
677 | #include <linux/proc_fs.h> | |
678 | ||
02f1175c JS |
679 | static void cy_throttle(struct tty_struct *tty); |
680 | static void cy_send_xchar(struct tty_struct *tty, char ch); | |
1da177e4 LT |
681 | |
682 | #define IS_CYC_Z(card) ((card).num_chips == -1) | |
683 | ||
684 | #define Z_FPGA_CHECK(card) \ | |
02f1175c JS |
685 | ((cy_readl(&((struct RUNTIME_9060 __iomem *) \ |
686 | ((card).ctl_addr))->init_ctrl) & (1<<17)) != 0) | |
1da177e4 LT |
687 | |
688 | #define ISZLOADED(card) (((ZO_V1==cy_readl(&((struct RUNTIME_9060 __iomem *) \ | |
689 | ((card).ctl_addr))->mail_box_0)) || \ | |
690 | Z_FPGA_CHECK(card)) && \ | |
691 | (ZFIRM_ID==cy_readl(&((struct FIRM_ID __iomem *) \ | |
692 | ((card).base_addr+ID_ADDRESS))->signature))) | |
693 | ||
694 | #ifndef SERIAL_XMIT_SIZE | |
695 | #define SERIAL_XMIT_SIZE (min(PAGE_SIZE, 4096)) | |
696 | #endif | |
697 | #define WAKEUP_CHARS 256 | |
698 | ||
699 | #define STD_COM_FLAGS (0) | |
700 | ||
1da177e4 LT |
701 | static struct tty_driver *cy_serial_driver; |
702 | ||
703 | #ifdef CONFIG_ISA | |
704 | /* This is the address lookup table. The driver will probe for | |
705 | Cyclom-Y/ISA boards at all addresses in here. If you want the | |
706 | driver to probe addresses at a different address, add it to | |
707 | this table. If the driver is probing some other board and | |
708 | causing problems, remove the offending address from this table. | |
709 | The cy_setup function extracts additional addresses from the | |
710 | boot options line. The form is "cyclades=address,address..." | |
711 | */ | |
712 | ||
713 | static unsigned int cy_isa_addresses[] = { | |
02f1175c JS |
714 | 0xD0000, |
715 | 0xD2000, | |
716 | 0xD4000, | |
717 | 0xD6000, | |
718 | 0xD8000, | |
719 | 0xDA000, | |
720 | 0xDC000, | |
721 | 0xDE000, | |
722 | 0, 0, 0, 0, 0, 0, 0, 0 | |
1da177e4 | 723 | }; |
02f1175c | 724 | |
fe971071 | 725 | #define NR_ISA_ADDRS ARRAY_SIZE(cy_isa_addresses) |
1da177e4 LT |
726 | |
727 | #ifdef MODULE | |
728 | static long maddr[NR_CARDS] = { 0, }; | |
02f1175c | 729 | static int irq[NR_CARDS] = { 0, }; |
1da177e4 LT |
730 | |
731 | module_param_array(maddr, long, NULL, 0); | |
732 | module_param_array(irq, int, NULL, 0); | |
733 | #endif | |
734 | ||
02f1175c | 735 | #endif /* CONFIG_ISA */ |
1da177e4 LT |
736 | |
737 | /* This is the per-card data structure containing address, irq, number of | |
738 | channels, etc. This driver supports a maximum of NR_CARDS cards. | |
739 | */ | |
740 | static struct cyclades_card cy_card[NR_CARDS]; | |
741 | ||
742 | /* This is the per-channel data structure containing pointers, flags | |
743 | and variables for the port. This driver supports a maximum of NR_PORTS. | |
744 | */ | |
745 | static struct cyclades_port cy_port[NR_PORTS]; | |
746 | ||
02f1175c | 747 | static int cy_next_channel; /* next minor available */ |
1da177e4 | 748 | |
1da177e4 LT |
749 | /* |
750 | * This is used to look up the divisor speeds and the timeouts | |
751 | * We're normally limited to 15 distinct baud rates. The extra | |
752 | * are accessed via settings in info->flags. | |
753 | * 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, | |
754 | * 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, | |
755 | * HI VHI | |
756 | * 20 | |
757 | */ | |
758 | static int baud_table[] = { | |
02f1175c JS |
759 | 0, 50, 75, 110, 134, 150, 200, 300, 600, 1200, |
760 | 1800, 2400, 4800, 9600, 19200, 38400, 57600, 76800, 115200, 150000, | |
761 | 230400, 0 | |
762 | }; | |
763 | ||
764 | static char baud_co_25[] = { /* 25 MHz clock option table */ | |
765 | /* value => 00 01 02 03 04 */ | |
766 | /* divide by 8 32 128 512 2048 */ | |
767 | 0x00, 0x04, 0x04, 0x04, 0x04, 0x04, 0x03, 0x03, 0x03, 0x02, | |
768 | 0x02, 0x02, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 | |
769 | }; | |
770 | ||
771 | static char baud_bpr_25[] = { /* 25 MHz baud rate period table */ | |
772 | 0x00, 0xf5, 0xa3, 0x6f, 0x5c, 0x51, 0xf5, 0xa3, 0x51, 0xa3, | |
773 | 0x6d, 0x51, 0xa3, 0x51, 0xa3, 0x51, 0x36, 0x29, 0x1b, 0x15 | |
774 | }; | |
775 | ||
776 | static char baud_co_60[] = { /* 60 MHz clock option table (CD1400 J) */ | |
777 | /* value => 00 01 02 03 04 */ | |
778 | /* divide by 8 32 128 512 2048 */ | |
779 | 0x00, 0x00, 0x00, 0x04, 0x04, 0x04, 0x04, 0x04, 0x03, 0x03, | |
780 | 0x03, 0x02, 0x02, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, | |
781 | 0x00 | |
782 | }; | |
783 | ||
784 | static char baud_bpr_60[] = { /* 60 MHz baud rate period table (CD1400 J) */ | |
785 | 0x00, 0x82, 0x21, 0xff, 0xdb, 0xc3, 0x92, 0x62, 0xc3, 0x62, | |
786 | 0x41, 0xc3, 0x62, 0xc3, 0x62, 0xc3, 0x82, 0x62, 0x41, 0x32, | |
787 | 0x21 | |
788 | }; | |
789 | ||
790 | static char baud_cor3[] = { /* receive threshold */ | |
791 | 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, | |
792 | 0x0a, 0x0a, 0x0a, 0x09, 0x09, 0x08, 0x08, 0x08, 0x08, 0x07, | |
793 | 0x07 | |
794 | }; | |
1da177e4 LT |
795 | |
796 | /* | |
797 | * The Cyclades driver implements HW flow control as any serial driver. | |
798 | * The cyclades_port structure member rflow and the vector rflow_thr | |
799 | * allows us to take advantage of a special feature in the CD1400 to avoid | |
800 | * data loss even when the system interrupt latency is too high. These flags | |
801 | * are to be used only with very special applications. Setting these flags | |
802 | * requires the use of a special cable (DTR and RTS reversed). In the new | |
803 | * CD1400-based boards (rev. 6.00 or later), there is no need for special | |
804 | * cables. | |
805 | */ | |
806 | ||
02f1175c JS |
807 | static char rflow_thr[] = { /* rflow threshold */ |
808 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, | |
809 | 0x00, 0x00, 0x00, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, | |
810 | 0x0a | |
811 | }; | |
1da177e4 LT |
812 | |
813 | /* The Cyclom-Ye has placed the sequential chips in non-sequential | |
814 | * address order. This look-up table overcomes that problem. | |
815 | */ | |
02f1175c JS |
816 | static int cy_chip_offset[] = { 0x0000, |
817 | 0x0400, | |
818 | 0x0800, | |
819 | 0x0C00, | |
820 | 0x0200, | |
821 | 0x0600, | |
822 | 0x0A00, | |
823 | 0x0E00 | |
824 | }; | |
1da177e4 LT |
825 | |
826 | /* PCI related definitions */ | |
827 | ||
02f1175c JS |
828 | static unsigned short cy_pci_nboard; |
829 | static unsigned short cy_isa_nboard; | |
830 | static unsigned short cy_nboard; | |
1da177e4 | 831 | #ifdef CONFIG_PCI |
02f1175c JS |
832 | static unsigned short cy_pci_dev_id[] = { |
833 | PCI_DEVICE_ID_CYCLOM_Y_Lo, /* PCI < 1Mb */ | |
834 | PCI_DEVICE_ID_CYCLOM_Y_Hi, /* PCI > 1Mb */ | |
835 | PCI_DEVICE_ID_CYCLOM_4Y_Lo, /* 4Y PCI < 1Mb */ | |
836 | PCI_DEVICE_ID_CYCLOM_4Y_Hi, /* 4Y PCI > 1Mb */ | |
837 | PCI_DEVICE_ID_CYCLOM_8Y_Lo, /* 8Y PCI < 1Mb */ | |
838 | PCI_DEVICE_ID_CYCLOM_8Y_Hi, /* 8Y PCI > 1Mb */ | |
839 | PCI_DEVICE_ID_CYCLOM_Z_Lo, /* Z PCI < 1Mb */ | |
840 | PCI_DEVICE_ID_CYCLOM_Z_Hi, /* Z PCI > 1Mb */ | |
841 | 0 /* end of table */ | |
842 | }; | |
1da177e4 LT |
843 | #endif |
844 | ||
845 | static void cy_start(struct tty_struct *); | |
846 | static void set_line_char(struct cyclades_port *); | |
847 | static int cyz_issue_cmd(struct cyclades_card *, uclong, ucchar, uclong); | |
848 | #ifdef CONFIG_ISA | |
849 | static unsigned detect_isa_irq(void __iomem *); | |
02f1175c | 850 | #endif /* CONFIG_ISA */ |
1da177e4 | 851 | |
02f1175c | 852 | static int cyclades_get_proc_info(char *, char **, off_t, int, int *, void *); |
1da177e4 LT |
853 | |
854 | #ifndef CONFIG_CYZ_INTR | |
855 | static void cyz_poll(unsigned long); | |
856 | ||
857 | /* The Cyclades-Z polling cycle is defined by this variable */ | |
858 | static long cyz_polling_cycle = CZ_DEF_POLL; | |
859 | ||
860 | static int cyz_timeron = 0; | |
8d06afab | 861 | static DEFINE_TIMER(cyz_timerlist, cyz_poll, 0, 0); |
1da177e4 | 862 | |
02f1175c | 863 | #else /* CONFIG_CYZ_INTR */ |
1da177e4 LT |
864 | static void cyz_rx_restart(unsigned long); |
865 | static struct timer_list cyz_rx_full_timer[NR_PORTS]; | |
02f1175c | 866 | #endif /* CONFIG_CYZ_INTR */ |
1da177e4 | 867 | |
02f1175c JS |
868 | static inline int serial_paranoia_check(struct cyclades_port *info, |
869 | char *name, const char *routine) | |
1da177e4 LT |
870 | { |
871 | #ifdef SERIAL_PARANOIA_CHECK | |
02f1175c | 872 | if (!info) { |
096dcfce JS |
873 | printk("cyc Warning: null cyclades_port for (%s) in %s\n", |
874 | name, routine); | |
02f1175c JS |
875 | return 1; |
876 | } | |
877 | ||
878 | if ((long)info < (long)(&cy_port[0]) || | |
879 | (long)(&cy_port[NR_PORTS]) < (long)info) { | |
096dcfce JS |
880 | printk("cyc Warning: cyclades_port out of range for (%s) in " |
881 | "%s\n", name, routine); | |
02f1175c JS |
882 | return 1; |
883 | } | |
884 | ||
885 | if (info->magic != CYCLADES_MAGIC) { | |
096dcfce JS |
886 | printk("cyc Warning: bad magic number for serial struct (%s) " |
887 | "in %s\n", name, routine); | |
02f1175c JS |
888 | return 1; |
889 | } | |
1da177e4 | 890 | #endif |
02f1175c JS |
891 | return 0; |
892 | } /* serial_paranoia_check */ | |
1da177e4 LT |
893 | |
894 | /* | |
895 | * This routine is used by the interrupt handler to schedule | |
896 | * processing in the software interrupt portion of the driver | |
897 | * (also known as the "bottom half"). This can be called any | |
898 | * number of times for any channel without harm. | |
899 | */ | |
02f1175c | 900 | static inline void cy_sched_event(struct cyclades_port *info, int event) |
1da177e4 | 901 | { |
02f1175c JS |
902 | info->event |= 1 << event; /* remember what kind of event and who */ |
903 | schedule_work(&info->tqueue); | |
904 | } /* cy_sched_event */ | |
1da177e4 LT |
905 | |
906 | /* | |
907 | * This routine is used to handle the "bottom half" processing for the | |
908 | * serial driver, known also the "software interrupt" processing. | |
909 | * This processing is done at the kernel interrupt level, after the | |
910 | * cy#/_interrupt() has returned, BUT WITH INTERRUPTS TURNED ON. This | |
911 | * is where time-consuming activities which can not be done in the | |
912 | * interrupt driver proper are done; the interrupt driver schedules | |
913 | * them using cy_sched_event(), and they get done here. | |
914 | * | |
915 | * This is done through one level of indirection--the task queue. | |
916 | * When a hardware interrupt service routine wants service by the | |
917 | * driver's bottom half, it enqueues the appropriate tq_struct (one | |
918 | * per port) to the keventd work queue and sets a request flag | |
919 | * that the work queue be processed. | |
920 | * | |
921 | * Although this may seem unwieldy, it gives the system a way to | |
922 | * pass an argument (in this case the pointer to the cyclades_port | |
923 | * structure) to the bottom half of the driver. Previous kernels | |
924 | * had to poll every port to see if that port needed servicing. | |
925 | */ | |
926 | static void | |
c4028958 | 927 | do_softint(struct work_struct *work) |
1da177e4 | 928 | { |
c4028958 DH |
929 | struct cyclades_port *info = |
930 | container_of(work, struct cyclades_port, tqueue); | |
02f1175c JS |
931 | struct tty_struct *tty; |
932 | ||
933 | tty = info->tty; | |
934 | if (!tty) | |
935 | return; | |
936 | ||
937 | if (test_and_clear_bit(Cy_EVENT_HANGUP, &info->event)) { | |
938 | tty_hangup(info->tty); | |
939 | wake_up_interruptible(&info->open_wait); | |
940 | info->flags &= ~ASYNC_NORMAL_ACTIVE; | |
941 | } | |
942 | if (test_and_clear_bit(Cy_EVENT_OPEN_WAKEUP, &info->event)) | |
943 | wake_up_interruptible(&info->open_wait); | |
1da177e4 | 944 | #ifdef CONFIG_CYZ_INTR |
02f1175c JS |
945 | if (test_and_clear_bit(Cy_EVENT_Z_RX_FULL, &info->event)) { |
946 | if (cyz_rx_full_timer[info->line].function == NULL) { | |
947 | cyz_rx_full_timer[info->line].expires = jiffies + 1; | |
948 | cyz_rx_full_timer[info->line].function = cyz_rx_restart; | |
949 | cyz_rx_full_timer[info->line].data = | |
950 | (unsigned long)info; | |
951 | add_timer(&cyz_rx_full_timer[info->line]); | |
952 | } | |
1da177e4 | 953 | } |
1da177e4 | 954 | #endif |
02f1175c JS |
955 | if (test_and_clear_bit(Cy_EVENT_DELTA_WAKEUP, &info->event)) |
956 | wake_up_interruptible(&info->delta_msr_wait); | |
957 | tty_wakeup(tty); | |
1da177e4 | 958 | #ifdef Z_WAKE |
02f1175c JS |
959 | if (test_and_clear_bit(Cy_EVENT_SHUTDOWN_WAKEUP, &info->event)) |
960 | wake_up_interruptible(&info->shutdown_wait); | |
1da177e4 LT |
961 | #endif |
962 | } /* do_softint */ | |
963 | ||
964 | ||
965 | /***********************************************************/ | |
966 | /********* Start of block of Cyclom-Y specific code ********/ | |
967 | ||
968 | /* This routine waits up to 1000 micro-seconds for the previous | |
969 | command to the Cirrus chip to complete and then issues the | |
970 | new command. An error is returned if the previous command | |
971 | didn't finish within the time limit. | |
972 | ||
973 | This function is only called from inside spinlock-protected code. | |
974 | */ | |
02f1175c | 975 | static int cyy_issue_cmd(void __iomem * base_addr, u_char cmd, int index) |
1da177e4 | 976 | { |
02f1175c | 977 | volatile int i; |
1da177e4 | 978 | |
02f1175c JS |
979 | /* Check to see that the previous command has completed */ |
980 | for (i = 0; i < 100; i++) { | |
981 | if (cy_readb(base_addr + (CyCCR << index)) == 0) { | |
982 | break; | |
983 | } | |
984 | udelay(10L); | |
1da177e4 | 985 | } |
02f1175c JS |
986 | /* if the CCR never cleared, the previous command |
987 | didn't finish within the "reasonable time" */ | |
988 | if (i == 100) | |
096dcfce | 989 | return -1; |
1da177e4 | 990 | |
02f1175c JS |
991 | /* Issue the new command */ |
992 | cy_writeb(base_addr + (CyCCR << index), cmd); | |
1da177e4 | 993 | |
096dcfce | 994 | return 0; |
02f1175c | 995 | } /* cyy_issue_cmd */ |
1da177e4 LT |
996 | |
997 | #ifdef CONFIG_ISA | |
998 | /* ISA interrupt detection code */ | |
02f1175c | 999 | static unsigned detect_isa_irq(void __iomem * address) |
1da177e4 | 1000 | { |
02f1175c JS |
1001 | int irq; |
1002 | unsigned long irqs, flags; | |
1003 | int save_xir, save_car; | |
1004 | int index = 0; /* IRQ probing is only for ISA */ | |
1005 | ||
1006 | /* forget possible initially masked and pending IRQ */ | |
1007 | irq = probe_irq_off(probe_irq_on()); | |
1008 | ||
1009 | /* Clear interrupts on the board first */ | |
1010 | cy_writeb(address + (Cy_ClrIntr << index), 0); | |
1011 | /* Cy_ClrIntr is 0x1800 */ | |
1012 | ||
1013 | irqs = probe_irq_on(); | |
1014 | /* Wait ... */ | |
1015 | udelay(5000L); | |
1016 | ||
1017 | /* Enable the Tx interrupts on the CD1400 */ | |
1018 | local_irq_save(flags); | |
1019 | cy_writeb(address + (CyCAR << index), 0); | |
1020 | cyy_issue_cmd(address, CyCHAN_CTL | CyENB_XMTR, index); | |
1021 | ||
1022 | cy_writeb(address + (CyCAR << index), 0); | |
1023 | cy_writeb(address + (CySRER << index), | |
1024 | cy_readb(address + (CySRER << index)) | CyTxRdy); | |
1025 | local_irq_restore(flags); | |
1026 | ||
1027 | /* Wait ... */ | |
1028 | udelay(5000L); | |
1029 | ||
1030 | /* Check which interrupt is in use */ | |
1031 | irq = probe_irq_off(irqs); | |
1032 | ||
1033 | /* Clean up */ | |
1034 | save_xir = (u_char) cy_readb(address + (CyTIR << index)); | |
1035 | save_car = cy_readb(address + (CyCAR << index)); | |
1036 | cy_writeb(address + (CyCAR << index), (save_xir & 0x3)); | |
1037 | cy_writeb(address + (CySRER << index), | |
1038 | cy_readb(address + (CySRER << index)) & ~CyTxRdy); | |
1039 | cy_writeb(address + (CyTIR << index), (save_xir & 0x3f)); | |
1040 | cy_writeb(address + (CyCAR << index), (save_car)); | |
1041 | cy_writeb(address + (Cy_ClrIntr << index), 0); | |
1042 | /* Cy_ClrIntr is 0x1800 */ | |
1043 | ||
1044 | return (irq > 0) ? irq : 0; | |
1da177e4 | 1045 | } |
02f1175c | 1046 | #endif /* CONFIG_ISA */ |
1da177e4 | 1047 | |
e941027f | 1048 | static void cyy_intr_chip(struct cyclades_card *cinfo, int chip, |
02f1175c | 1049 | void __iomem * base_addr, int status, int index) |
e941027f JS |
1050 | { |
1051 | struct cyclades_port *info; | |
1052 | struct tty_struct *tty; | |
1053 | volatile int char_count; | |
1054 | int i, j, len, mdm_change, mdm_status, outch; | |
1055 | int save_xir, channel, save_car; | |
1056 | char data; | |
1057 | ||
02f1175c | 1058 | if (status & CySRReceive) { /* reception interrupt */ |
e941027f | 1059 | #ifdef CY_DEBUG_INTERRUPTS |
02f1175c | 1060 | printk("cyy_interrupt: rcvd intr, chip %d\n\r", chip); |
e941027f | 1061 | #endif |
02f1175c JS |
1062 | /* determine the channel & change to that context */ |
1063 | spin_lock(&cinfo->card_lock); | |
1064 | save_xir = (u_char) cy_readb(base_addr + (CyRIR << index)); | |
1065 | channel = (u_short) (save_xir & CyIRChannel); | |
1066 | i = channel + chip * 4 + cinfo->first_line; | |
1067 | info = &cy_port[i]; | |
1068 | info->last_active = jiffies; | |
1069 | save_car = cy_readb(base_addr + (CyCAR << index)); | |
1070 | cy_writeb(base_addr + (CyCAR << index), save_xir); | |
1071 | ||
1072 | /* if there is nowhere to put the data, discard it */ | |
1073 | if (info->tty == 0) { | |
1074 | j = (cy_readb(base_addr + (CyRIVR << index)) & | |
1075 | CyIVRMask); | |
1076 | if (j == CyIVRRxEx) { /* exception */ | |
1077 | data = cy_readb(base_addr + (CyRDSR << index)); | |
1078 | } else { /* normal character reception */ | |
1079 | char_count = cy_readb(base_addr + | |
1080 | (CyRDCR << index)); | |
1081 | while (char_count--) { | |
1082 | data = cy_readb(base_addr + | |
1083 | (CyRDSR << index)); | |
e941027f | 1084 | } |
e941027f | 1085 | } |
02f1175c JS |
1086 | } else { /* there is an open port for this data */ |
1087 | tty = info->tty; | |
1088 | j = (cy_readb(base_addr + (CyRIVR << index)) & | |
1089 | CyIVRMask); | |
1090 | if (j == CyIVRRxEx) { /* exception */ | |
1091 | data = cy_readb(base_addr + (CyRDSR << index)); | |
1092 | ||
1093 | /* For statistics only */ | |
1094 | if (data & CyBREAK) | |
1095 | info->icount.brk++; | |
1096 | else if (data & CyFRAME) | |
1097 | info->icount.frame++; | |
1098 | else if (data & CyPARITY) | |
1099 | info->icount.parity++; | |
1100 | else if (data & CyOVERRUN) | |
1101 | info->icount.overrun++; | |
1102 | ||
1103 | if (data & info->ignore_status_mask) { | |
1104 | info->icount.rx++; | |
1105 | return; | |
1106 | } | |
1107 | if (tty_buffer_request_room(tty, 1)) { | |
1108 | if (data & info->read_status_mask) { | |
1109 | if (data & CyBREAK) { | |
1110 | tty_insert_flip_char( | |
1111 | tty, | |
1112 | cy_readb( | |
1113 | base_addr + | |
1114 | (CyRDSR << | |
1115 | index)), | |
1116 | TTY_BREAK); | |
1117 | info->icount.rx++; | |
1118 | if (info->flags & | |
1119 | ASYNC_SAK) { | |
1120 | do_SAK(tty); | |
1121 | } | |
1122 | } else if (data & CyFRAME) { | |
1123 | tty_insert_flip_char( | |
1124 | tty, | |
1125 | cy_readb( | |
1126 | base_addr + | |
1127 | (CyRDSR << | |
1128 | index)), | |
1129 | TTY_FRAME); | |
1130 | info->icount.rx++; | |
1131 | info->idle_stats. | |
1132 | frame_errs++; | |
1133 | } else if (data & CyPARITY) { | |
1134 | /* Pieces of seven... */ | |
1135 | tty_insert_flip_char( | |
1136 | tty, | |
1137 | cy_readb( | |
1138 | base_addr + | |
1139 | (CyRDSR << | |
1140 | index)), | |
1141 | TTY_PARITY); | |
1142 | info->icount.rx++; | |
1143 | info->idle_stats. | |
1144 | parity_errs++; | |
1145 | } else if (data & CyOVERRUN) { | |
1146 | tty_insert_flip_char( | |
1147 | tty, 0, | |
1148 | TTY_OVERRUN); | |
1149 | info->icount.rx++; | |
1150 | /* If the flip buffer itself is | |
1151 | overflowing, we still lose | |
1152 | the next incoming character. | |
1153 | */ | |
1154 | tty_insert_flip_char( | |
1155 | tty, | |
1156 | cy_readb( | |
1157 | base_addr + | |
1158 | (CyRDSR << | |
1159 | index)), | |
1160 | TTY_FRAME); | |
1161 | info->icount.rx++; | |
1162 | info->idle_stats. | |
1163 | overruns++; | |
1164 | /* These two conditions may imply */ | |
1165 | /* a normal read should be done. */ | |
1166 | /* }else if(data & CyTIMEOUT){ */ | |
1167 | /* }else if(data & CySPECHAR){ */ | |
1168 | } else { | |
1169 | tty_insert_flip_char( | |
1170 | tty, 0, | |
1171 | TTY_NORMAL); | |
1172 | info->icount.rx++; | |
1173 | } | |
1174 | } else { | |
1175 | tty_insert_flip_char(tty, 0, | |
1176 | TTY_NORMAL); | |
1177 | info->icount.rx++; | |
1178 | } | |
1179 | } else { | |
1180 | /* there was a software buffer | |
1181 | overrun and nothing could be | |
1182 | done about it!!! */ | |
1183 | info->icount.buf_overrun++; | |
1184 | info->idle_stats.overruns++; | |
1185 | } | |
1186 | } else { /* normal character reception */ | |
1187 | /* load # chars available from the chip */ | |
1188 | char_count = cy_readb(base_addr + | |
1189 | (CyRDCR << index)); | |
e941027f JS |
1190 | |
1191 | #ifdef CY_ENABLE_MONITORING | |
02f1175c JS |
1192 | ++info->mon.int_count; |
1193 | info->mon.char_count += char_count; | |
1194 | if (char_count > info->mon.char_max) | |
1195 | info->mon.char_max = char_count; | |
1196 | info->mon.char_last = char_count; | |
e941027f | 1197 | #endif |
02f1175c JS |
1198 | len = tty_buffer_request_room(tty, char_count); |
1199 | while (len--) { | |
1200 | data = cy_readb(base_addr + | |
1201 | (CyRDSR << index)); | |
1202 | tty_insert_flip_char(tty, data, | |
1203 | TTY_NORMAL); | |
1204 | info->idle_stats.recv_bytes++; | |
1205 | info->icount.rx++; | |
e941027f | 1206 | #ifdef CY_16Y_HACK |
02f1175c | 1207 | udelay(10L); |
e941027f | 1208 | #endif |
02f1175c JS |
1209 | } |
1210 | info->idle_stats.recv_idle = jiffies; | |
1211 | } | |
1212 | tty_schedule_flip(tty); | |
e941027f | 1213 | } |
02f1175c JS |
1214 | /* end of service */ |
1215 | cy_writeb(base_addr + (CyRIR << index), (save_xir & 0x3f)); | |
1216 | cy_writeb(base_addr + (CyCAR << index), (save_car)); | |
1217 | spin_unlock(&cinfo->card_lock); | |
e941027f JS |
1218 | } |
1219 | ||
02f1175c JS |
1220 | if (status & CySRTransmit) { /* transmission interrupt */ |
1221 | /* Since we only get here when the transmit buffer | |
1222 | is empty, we know we can always stuff a dozen | |
1223 | characters. */ | |
e941027f | 1224 | #ifdef CY_DEBUG_INTERRUPTS |
02f1175c | 1225 | printk("cyy_interrupt: xmit intr, chip %d\n\r", chip); |
e941027f JS |
1226 | #endif |
1227 | ||
02f1175c JS |
1228 | /* determine the channel & change to that context */ |
1229 | spin_lock(&cinfo->card_lock); | |
1230 | save_xir = (u_char) cy_readb(base_addr + (CyTIR << index)); | |
1231 | channel = (u_short) (save_xir & CyIRChannel); | |
1232 | i = channel + chip * 4 + cinfo->first_line; | |
1233 | save_car = cy_readb(base_addr + (CyCAR << index)); | |
1234 | cy_writeb(base_addr + (CyCAR << index), save_xir); | |
1235 | ||
1236 | /* validate the port# (as configured and open) */ | |
1237 | if ((i < 0) || (NR_PORTS <= i)) { | |
1238 | cy_writeb(base_addr + (CySRER << index), | |
1239 | cy_readb(base_addr + (CySRER << index)) & | |
1240 | ~CyTxRdy); | |
1241 | goto txend; | |
e941027f | 1242 | } |
02f1175c JS |
1243 | info = &cy_port[i]; |
1244 | info->last_active = jiffies; | |
1245 | if (info->tty == 0) { | |
1246 | cy_writeb(base_addr + (CySRER << index), | |
1247 | cy_readb(base_addr + (CySRER << index)) & | |
1248 | ~CyTxRdy); | |
1249 | goto txdone; | |
e941027f | 1250 | } |
02f1175c JS |
1251 | |
1252 | /* load the on-chip space for outbound data */ | |
1253 | char_count = info->xmit_fifo_size; | |
1254 | ||
1255 | if (info->x_char) { /* send special char */ | |
1256 | outch = info->x_char; | |
1257 | cy_writeb(base_addr + (CyTDR << index), outch); | |
1258 | char_count--; | |
1259 | info->icount.tx++; | |
1260 | info->x_char = 0; | |
e941027f | 1261 | } |
02f1175c JS |
1262 | |
1263 | if (info->breakon || info->breakoff) { | |
1264 | if (info->breakon) { | |
1265 | cy_writeb(base_addr + (CyTDR << index), 0); | |
1266 | cy_writeb(base_addr + (CyTDR << index), 0x81); | |
1267 | info->breakon = 0; | |
1268 | char_count -= 2; | |
1269 | } | |
1270 | if (info->breakoff) { | |
1271 | cy_writeb(base_addr + (CyTDR << index), 0); | |
1272 | cy_writeb(base_addr + (CyTDR << index), 0x83); | |
1273 | info->breakoff = 0; | |
1274 | char_count -= 2; | |
1275 | } | |
e941027f | 1276 | } |
02f1175c JS |
1277 | |
1278 | while (char_count-- > 0) { | |
1279 | if (!info->xmit_cnt) { | |
1280 | if (cy_readb(base_addr + (CySRER << index)) & | |
1281 | CyTxMpty) { | |
1282 | cy_writeb(base_addr + (CySRER << index), | |
1283 | cy_readb(base_addr + | |
1284 | (CySRER << index)) & | |
1285 | ~CyTxMpty); | |
1286 | } else { | |
1287 | cy_writeb(base_addr + (CySRER << index), | |
1288 | (cy_readb(base_addr + | |
1289 | (CySRER << index)) & | |
1290 | ~CyTxRdy) | CyTxMpty); | |
1291 | } | |
1292 | goto txdone; | |
1293 | } | |
1294 | if (info->xmit_buf == 0) { | |
1295 | cy_writeb(base_addr + (CySRER << index), | |
1296 | cy_readb(base_addr + (CySRER << index))& | |
1297 | ~CyTxRdy); | |
1298 | goto txdone; | |
1299 | } | |
1300 | if (info->tty->stopped || info->tty->hw_stopped) { | |
1301 | cy_writeb(base_addr + (CySRER << index), | |
1302 | cy_readb(base_addr + (CySRER << index))& | |
1303 | ~CyTxRdy); | |
1304 | goto txdone; | |
1305 | } | |
1306 | /* Because the Embedded Transmit Commands have | |
1307 | been enabled, we must check to see if the | |
1308 | escape character, NULL, is being sent. If it | |
1309 | is, we must ensure that there is room for it | |
1310 | to be doubled in the output stream. Therefore | |
1311 | we no longer advance the pointer when the | |
1312 | character is fetched, but rather wait until | |
1313 | after the check for a NULL output character. | |
1314 | This is necessary because there may not be | |
1315 | room for the two chars needed to send a NULL.) | |
1316 | */ | |
1317 | outch = info->xmit_buf[info->xmit_tail]; | |
1318 | if (outch) { | |
1319 | info->xmit_cnt--; | |
1320 | info->xmit_tail = (info->xmit_tail + 1) & | |
1321 | (SERIAL_XMIT_SIZE - 1); | |
1322 | cy_writeb(base_addr + (CyTDR << index), outch); | |
1323 | info->icount.tx++; | |
1324 | } else { | |
1325 | if (char_count > 1) { | |
1326 | info->xmit_cnt--; | |
1327 | info->xmit_tail = (info->xmit_tail + 1)& | |
1328 | (SERIAL_XMIT_SIZE - 1); | |
1329 | cy_writeb(base_addr + (CyTDR << index), | |
1330 | outch); | |
1331 | cy_writeb(base_addr + (CyTDR << index), | |
1332 | 0); | |
1333 | info->icount.tx++; | |
1334 | char_count--; | |
1335 | } else { | |
1336 | } | |
1337 | } | |
e941027f | 1338 | } |
e941027f JS |
1339 | |
1340 | txdone: | |
02f1175c JS |
1341 | if (info->xmit_cnt < WAKEUP_CHARS) { |
1342 | cy_sched_event(info, Cy_EVENT_WRITE_WAKEUP); | |
1343 | } | |
e941027f | 1344 | txend: |
02f1175c JS |
1345 | /* end of service */ |
1346 | cy_writeb(base_addr + (CyTIR << index), (save_xir & 0x3f)); | |
1347 | cy_writeb(base_addr + (CyCAR << index), (save_car)); | |
1348 | spin_unlock(&cinfo->card_lock); | |
e941027f JS |
1349 | } |
1350 | ||
02f1175c | 1351 | if (status & CySRModem) { /* modem interrupt */ |
e941027f | 1352 | |
02f1175c JS |
1353 | /* determine the channel & change to that context */ |
1354 | spin_lock(&cinfo->card_lock); | |
1355 | save_xir = (u_char) cy_readb(base_addr + (CyMIR << index)); | |
1356 | channel = (u_short) (save_xir & CyIRChannel); | |
1357 | info = &cy_port[channel + chip * 4 + cinfo->first_line]; | |
1358 | info->last_active = jiffies; | |
1359 | save_car = cy_readb(base_addr + (CyCAR << index)); | |
1360 | cy_writeb(base_addr + (CyCAR << index), save_xir); | |
1361 | ||
1362 | mdm_change = cy_readb(base_addr + (CyMISR << index)); | |
1363 | mdm_status = cy_readb(base_addr + (CyMSVR1 << index)); | |
1364 | ||
1365 | if (info->tty == 0) { /* no place for data, ignore it */ | |
1366 | ; | |
1367 | } else { | |
1368 | if (mdm_change & CyANY_DELTA) { | |
1369 | /* For statistics only */ | |
1370 | if (mdm_change & CyDCD) | |
1371 | info->icount.dcd++; | |
1372 | if (mdm_change & CyCTS) | |
1373 | info->icount.cts++; | |
1374 | if (mdm_change & CyDSR) | |
1375 | info->icount.dsr++; | |
1376 | if (mdm_change & CyRI) | |
1377 | info->icount.rng++; | |
1378 | ||
1379 | cy_sched_event(info, Cy_EVENT_DELTA_WAKEUP); | |
e941027f | 1380 | } |
02f1175c JS |
1381 | |
1382 | if ((mdm_change & CyDCD) && | |
1383 | (info->flags & ASYNC_CHECK_CD)) { | |
1384 | if (mdm_status & CyDCD) { | |
1385 | cy_sched_event(info, | |
1386 | Cy_EVENT_OPEN_WAKEUP); | |
1387 | } else { | |
1388 | cy_sched_event(info, Cy_EVENT_HANGUP); | |
1389 | } | |
1390 | } | |
1391 | if ((mdm_change & CyCTS) && | |
1392 | (info->flags & ASYNC_CTS_FLOW)) { | |
1393 | if (info->tty->hw_stopped) { | |
1394 | if (mdm_status & CyCTS) { | |
1395 | /* cy_start isn't used | |
1396 | because... !!! */ | |
1397 | info->tty->hw_stopped = 0; | |
1398 | cy_writeb(base_addr + | |
1399 | (CySRER << index), | |
1400 | cy_readb(base_addr + | |
1401 | (CySRER << | |
1402 | index))| | |
1403 | CyTxRdy); | |
1404 | cy_sched_event(info, | |
1405 | Cy_EVENT_WRITE_WAKEUP); | |
1406 | } | |
1407 | } else { | |
1408 | if (!(mdm_status & CyCTS)) { | |
1409 | /* cy_stop isn't used | |
1410 | because ... !!! */ | |
1411 | info->tty->hw_stopped = 1; | |
1412 | cy_writeb(base_addr + | |
1413 | (CySRER << index), | |
1414 | cy_readb(base_addr + | |
1415 | (CySRER << | |
1416 | index)) & | |
1417 | ~CyTxRdy); | |
1418 | } | |
1419 | } | |
1420 | } | |
1421 | if (mdm_change & CyDSR) { | |
1422 | } | |
1423 | if (mdm_change & CyRI) { | |
e941027f | 1424 | } |
e941027f | 1425 | } |
02f1175c JS |
1426 | /* end of service */ |
1427 | cy_writeb(base_addr + (CyMIR << index), (save_xir & 0x3f)); | |
1428 | cy_writeb(base_addr + (CyCAR << index), save_car); | |
1429 | spin_unlock(&cinfo->card_lock); | |
e941027f JS |
1430 | } |
1431 | } | |
1432 | ||
1da177e4 LT |
1433 | /* The real interrupt service routine is called |
1434 | whenever the card wants its hand held--chars | |
1435 | received, out buffer empty, modem change, etc. | |
1436 | */ | |
02f1175c | 1437 | static irqreturn_t cyy_interrupt(int irq, void *dev_id) |
1da177e4 | 1438 | { |
02f1175c JS |
1439 | int status; |
1440 | struct cyclades_card *cinfo; | |
1441 | void __iomem *base_addr, *card_base_addr; | |
1442 | int chip; | |
1443 | int index; | |
1444 | int too_many; | |
1445 | int had_work; | |
1446 | ||
1447 | if ((cinfo = (struct cyclades_card *)dev_id) == 0) { | |
1da177e4 | 1448 | #ifdef CY_DEBUG_INTERRUPTS |
02f1175c | 1449 | printk("cyy_interrupt: spurious interrupt %d\n\r", irq); |
1da177e4 | 1450 | #endif |
02f1175c JS |
1451 | return IRQ_NONE; /* spurious interrupt */ |
1452 | } | |
1453 | ||
1454 | card_base_addr = cinfo->base_addr; | |
1455 | index = cinfo->bus_index; | |
1456 | ||
1457 | /* This loop checks all chips in the card. Make a note whenever | |
1458 | _any_ chip had some work to do, as this is considered an | |
1459 | indication that there will be more to do. Only when no chip | |
1460 | has any work does this outermost loop exit. | |
1461 | */ | |
1462 | do { | |
1463 | had_work = 0; | |
1464 | for (chip = 0; chip < cinfo->num_chips; chip++) { | |
1465 | base_addr = cinfo->base_addr + | |
1466 | (cy_chip_offset[chip] << index); | |
1467 | too_many = 0; | |
1468 | while ((status = cy_readb(base_addr + | |
1469 | (CySVRR << index))) != 0x00) { | |
1470 | had_work++; | |
1471 | /* The purpose of the following test is to ensure that | |
1472 | no chip can monopolize the driver. This forces the | |
1473 | chips to be checked in a round-robin fashion (after | |
1474 | draining each of a bunch (1000) of characters). | |
1475 | */ | |
1476 | if (1000 < too_many++) { | |
1477 | break; | |
1478 | } | |
1479 | cyy_intr_chip(cinfo, chip, base_addr, status, | |
1480 | index); | |
1481 | } | |
1482 | } | |
1483 | } while (had_work); | |
1484 | ||
1485 | /* clear interrupts */ | |
1486 | spin_lock(&cinfo->card_lock); | |
1487 | cy_writeb(card_base_addr + (Cy_ClrIntr << index), 0); | |
1488 | /* Cy_ClrIntr is 0x1800 */ | |
1489 | spin_unlock(&cinfo->card_lock); | |
1490 | return IRQ_HANDLED; | |
1491 | } /* cyy_interrupt */ | |
1da177e4 LT |
1492 | |
1493 | /***********************************************************/ | |
1494 | /********* End of block of Cyclom-Y specific code **********/ | |
1495 | /******** Start of block of Cyclades-Z specific code *********/ | |
1496 | /***********************************************************/ | |
1497 | ||
1498 | static int | |
02f1175c JS |
1499 | cyz_fetch_msg(struct cyclades_card *cinfo, |
1500 | uclong * channel, ucchar * cmd, uclong * param) | |
1da177e4 | 1501 | { |
02f1175c JS |
1502 | struct FIRM_ID __iomem *firm_id; |
1503 | struct ZFW_CTRL __iomem *zfw_ctrl; | |
1504 | struct BOARD_CTRL __iomem *board_ctrl; | |
1505 | unsigned long loc_doorbell; | |
1506 | ||
1507 | firm_id = cinfo->base_addr + ID_ADDRESS; | |
1508 | if (!ISZLOADED(*cinfo)) { | |
096dcfce | 1509 | return -1; |
02f1175c JS |
1510 | } |
1511 | zfw_ctrl = cinfo->base_addr + (cy_readl(&firm_id->zfwctrl_addr) & | |
1512 | 0xfffff); | |
1513 | board_ctrl = &zfw_ctrl->board_ctrl; | |
1514 | ||
1515 | loc_doorbell = cy_readl(&((struct RUNTIME_9060 __iomem *) | |
1516 | (cinfo->ctl_addr))->loc_doorbell); | |
1517 | if (loc_doorbell) { | |
1518 | *cmd = (char)(0xff & loc_doorbell); | |
1519 | *channel = cy_readl(&board_ctrl->fwcmd_channel); | |
1520 | *param = (uclong) cy_readl(&board_ctrl->fwcmd_param); | |
1521 | cy_writel(&((struct RUNTIME_9060 __iomem *)(cinfo->ctl_addr))-> | |
1522 | loc_doorbell, 0xffffffff); | |
1523 | return 1; | |
1524 | } | |
1525 | return 0; | |
1526 | } /* cyz_fetch_msg */ | |
1da177e4 LT |
1527 | |
1528 | static int | |
02f1175c JS |
1529 | cyz_issue_cmd(struct cyclades_card *cinfo, |
1530 | uclong channel, ucchar cmd, uclong param) | |
1da177e4 | 1531 | { |
02f1175c JS |
1532 | struct FIRM_ID __iomem *firm_id; |
1533 | struct ZFW_CTRL __iomem *zfw_ctrl; | |
1534 | struct BOARD_CTRL __iomem *board_ctrl; | |
1535 | unsigned long __iomem *pci_doorbell; | |
1536 | int index; | |
1537 | ||
1538 | firm_id = cinfo->base_addr + ID_ADDRESS; | |
1539 | if (!ISZLOADED(*cinfo)) { | |
096dcfce | 1540 | return -1; |
02f1175c JS |
1541 | } |
1542 | zfw_ctrl = cinfo->base_addr + (cy_readl(&firm_id->zfwctrl_addr) & | |
1543 | 0xfffff); | |
1544 | board_ctrl = &zfw_ctrl->board_ctrl; | |
1545 | ||
1546 | index = 0; | |
1547 | pci_doorbell = | |
1548 | &((struct RUNTIME_9060 __iomem *)(cinfo->ctl_addr))->pci_doorbell; | |
1549 | while ((cy_readl(pci_doorbell) & 0xff) != 0) { | |
1550 | if (index++ == 1000) { | |
096dcfce | 1551 | return (int)(cy_readl(pci_doorbell) & 0xff); |
02f1175c JS |
1552 | } |
1553 | udelay(50L); | |
1554 | } | |
1555 | cy_writel(&board_ctrl->hcmd_channel, channel); | |
1556 | cy_writel(&board_ctrl->hcmd_param, param); | |
1557 | cy_writel(pci_doorbell, (long)cmd); | |
1558 | ||
096dcfce | 1559 | return 0; |
02f1175c | 1560 | } /* cyz_issue_cmd */ |
1da177e4 LT |
1561 | |
1562 | static void | |
1563 | cyz_handle_rx(struct cyclades_port *info, | |
02f1175c JS |
1564 | volatile struct CH_CTRL __iomem * ch_ctrl, |
1565 | volatile struct BUF_CTRL __iomem * buf_ctrl) | |
1da177e4 | 1566 | { |
02f1175c JS |
1567 | struct cyclades_card *cinfo = &cy_card[info->card]; |
1568 | struct tty_struct *tty = info->tty; | |
1569 | volatile int char_count; | |
1570 | int len; | |
1da177e4 | 1571 | #ifdef BLOCKMOVE |
02f1175c | 1572 | int small_count; |
1da177e4 | 1573 | #else |
02f1175c | 1574 | char data; |
1da177e4 | 1575 | #endif |
02f1175c | 1576 | volatile uclong rx_put, rx_get, new_rx_get, rx_bufsize, rx_bufaddr; |
1da177e4 | 1577 | |
02f1175c JS |
1578 | rx_get = new_rx_get = cy_readl(&buf_ctrl->rx_get); |
1579 | rx_put = cy_readl(&buf_ctrl->rx_put); | |
1580 | rx_bufsize = cy_readl(&buf_ctrl->rx_bufsize); | |
1581 | rx_bufaddr = cy_readl(&buf_ctrl->rx_bufaddr); | |
1582 | if (rx_put >= rx_get) | |
1583 | char_count = rx_put - rx_get; | |
1584 | else | |
1585 | char_count = rx_put - rx_get + rx_bufsize; | |
1da177e4 | 1586 | |
02f1175c JS |
1587 | if (char_count) { |
1588 | info->last_active = jiffies; | |
1589 | info->jiffies[1] = jiffies; | |
1da177e4 LT |
1590 | |
1591 | #ifdef CY_ENABLE_MONITORING | |
02f1175c JS |
1592 | info->mon.int_count++; |
1593 | info->mon.char_count += char_count; | |
1594 | if (char_count > info->mon.char_max) | |
1595 | info->mon.char_max = char_count; | |
1596 | info->mon.char_last = char_count; | |
1da177e4 | 1597 | #endif |
02f1175c JS |
1598 | if (tty == 0) { |
1599 | /* flush received characters */ | |
1600 | new_rx_get = (new_rx_get + char_count) & | |
1601 | (rx_bufsize - 1); | |
1602 | info->rflush_count++; | |
1603 | } else { | |
1da177e4 | 1604 | #ifdef BLOCKMOVE |
02f1175c JS |
1605 | /* we'd like to use memcpy(t, f, n) and memset(s, c, count) |
1606 | for performance, but because of buffer boundaries, there | |
1607 | may be several steps to the operation */ | |
1608 | while (0 < (small_count = min_t(unsigned int, | |
1609 | rx_bufsize - new_rx_get, | |
1610 | min_t(unsigned int, TTY_FLIPBUF_SIZE - | |
1611 | tty->flip.count, char_count)))){ | |
1612 | memcpy_fromio(tty->flip.char_buf_ptr, | |
1613 | (char *)(cinfo->base_addr + rx_bufaddr + | |
1614 | new_rx_get), | |
1615 | small_count); | |
1616 | ||
1617 | tty->flip.char_buf_ptr += small_count; | |
1618 | memset(tty->flip.flag_buf_ptr, TTY_NORMAL, | |
1619 | small_count); | |
1620 | tty->flip.flag_buf_ptr += small_count; | |
1621 | new_rx_get = (new_rx_get + small_count) & | |
1622 | (rx_bufsize - 1); | |
1623 | char_count -= small_count; | |
1624 | info->icount.rx += small_count; | |
1625 | info->idle_stats.recv_bytes += small_count; | |
1626 | tty->flip.count += small_count; | |
1627 | } | |
1da177e4 | 1628 | #else |
02f1175c JS |
1629 | len = tty_buffer_request_room(tty, char_count); |
1630 | while (len--) { | |
1631 | data = cy_readb(cinfo->base_addr + rx_bufaddr + | |
1632 | new_rx_get); | |
1633 | new_rx_get = (new_rx_get + 1)& (rx_bufsize - 1); | |
1634 | tty_insert_flip_char(tty, data, TTY_NORMAL); | |
1635 | info->idle_stats.recv_bytes++; | |
1636 | info->icount.rx++; | |
1637 | } | |
1da177e4 LT |
1638 | #endif |
1639 | #ifdef CONFIG_CYZ_INTR | |
02f1175c JS |
1640 | /* Recalculate the number of chars in the RX buffer and issue |
1641 | a cmd in case it's higher than the RX high water mark */ | |
1642 | rx_put = cy_readl(&buf_ctrl->rx_put); | |
1643 | if (rx_put >= rx_get) | |
1644 | char_count = rx_put - rx_get; | |
1645 | else | |
1646 | char_count = rx_put - rx_get + rx_bufsize; | |
90cc3018 JS |
1647 | if (char_count >= (int)cy_readl(&buf_ctrl-> |
1648 | rx_threshold)) { | |
02f1175c JS |
1649 | cy_sched_event(info, Cy_EVENT_Z_RX_FULL); |
1650 | } | |
1da177e4 | 1651 | #endif |
02f1175c JS |
1652 | info->idle_stats.recv_idle = jiffies; |
1653 | tty_schedule_flip(tty); | |
1654 | } | |
1655 | /* Update rx_get */ | |
1656 | cy_writel(&buf_ctrl->rx_get, new_rx_get); | |
1da177e4 | 1657 | } |
1da177e4 LT |
1658 | } |
1659 | ||
1660 | static void | |
1661 | cyz_handle_tx(struct cyclades_port *info, | |
02f1175c JS |
1662 | volatile struct CH_CTRL __iomem * ch_ctrl, |
1663 | volatile struct BUF_CTRL __iomem * buf_ctrl) | |
1da177e4 | 1664 | { |
02f1175c JS |
1665 | struct cyclades_card *cinfo = &cy_card[info->card]; |
1666 | struct tty_struct *tty = info->tty; | |
1667 | char data; | |
1668 | volatile int char_count; | |
1da177e4 | 1669 | #ifdef BLOCKMOVE |
02f1175c | 1670 | int small_count; |
1da177e4 | 1671 | #endif |
02f1175c | 1672 | volatile uclong tx_put, tx_get, tx_bufsize, tx_bufaddr; |
1da177e4 | 1673 | |
02f1175c JS |
1674 | if (info->xmit_cnt <= 0) /* Nothing to transmit */ |
1675 | return; | |
1da177e4 | 1676 | |
02f1175c JS |
1677 | tx_get = cy_readl(&buf_ctrl->tx_get); |
1678 | tx_put = cy_readl(&buf_ctrl->tx_put); | |
1679 | tx_bufsize = cy_readl(&buf_ctrl->tx_bufsize); | |
1680 | tx_bufaddr = cy_readl(&buf_ctrl->tx_bufaddr); | |
1681 | if (tx_put >= tx_get) | |
1682 | char_count = tx_get - tx_put - 1 + tx_bufsize; | |
1683 | else | |
1684 | char_count = tx_get - tx_put - 1; | |
1da177e4 | 1685 | |
02f1175c | 1686 | if (char_count) { |
1da177e4 | 1687 | |
02f1175c JS |
1688 | if (tty == 0) { |
1689 | goto ztxdone; | |
1690 | } | |
1da177e4 | 1691 | |
02f1175c JS |
1692 | if (info->x_char) { /* send special char */ |
1693 | data = info->x_char; | |
1da177e4 | 1694 | |
02f1175c JS |
1695 | cy_writeb(cinfo->base_addr + tx_bufaddr + tx_put, data); |
1696 | tx_put = (tx_put + 1) & (tx_bufsize - 1); | |
1697 | info->x_char = 0; | |
1698 | char_count--; | |
1699 | info->icount.tx++; | |
1700 | info->last_active = jiffies; | |
1701 | info->jiffies[2] = jiffies; | |
1702 | } | |
1da177e4 | 1703 | #ifdef BLOCKMOVE |
02f1175c JS |
1704 | while (0 < (small_count = min_t(unsigned int, |
1705 | tx_bufsize - tx_put, min_t(unsigned int, | |
1706 | (SERIAL_XMIT_SIZE - info->xmit_tail), | |
1707 | min_t(unsigned int, info->xmit_cnt, | |
1708 | char_count))))) { | |
1709 | ||
1710 | memcpy_toio((char *)(cinfo->base_addr + tx_bufaddr + | |
1711 | tx_put), | |
1712 | &info->xmit_buf[info->xmit_tail], | |
1713 | small_count); | |
1714 | ||
1715 | tx_put = (tx_put + small_count) & (tx_bufsize - 1); | |
1716 | char_count -= small_count; | |
1717 | info->icount.tx += small_count; | |
1718 | info->xmit_cnt -= small_count; | |
1719 | info->xmit_tail = (info->xmit_tail + small_count) & | |
1720 | (SERIAL_XMIT_SIZE - 1); | |
1721 | info->last_active = jiffies; | |
1722 | info->jiffies[2] = jiffies; | |
1723 | } | |
1da177e4 | 1724 | #else |
02f1175c JS |
1725 | while (info->xmit_cnt && char_count) { |
1726 | data = info->xmit_buf[info->xmit_tail]; | |
1727 | info->xmit_cnt--; | |
1728 | info->xmit_tail = (info->xmit_tail + 1) & | |
1729 | (SERIAL_XMIT_SIZE - 1); | |
1730 | ||
1731 | cy_writeb(cinfo->base_addr + tx_bufaddr + tx_put, data); | |
1732 | tx_put = (tx_put + 1) & (tx_bufsize - 1); | |
1733 | char_count--; | |
1734 | info->icount.tx++; | |
1735 | info->last_active = jiffies; | |
1736 | info->jiffies[2] = jiffies; | |
1737 | } | |
1da177e4 | 1738 | #endif |
02f1175c JS |
1739 | ztxdone: |
1740 | if (info->xmit_cnt < WAKEUP_CHARS) { | |
1741 | cy_sched_event(info, Cy_EVENT_WRITE_WAKEUP); | |
1742 | } | |
1743 | /* Update tx_put */ | |
1744 | cy_writel(&buf_ctrl->tx_put, tx_put); | |
1da177e4 | 1745 | } |
1da177e4 LT |
1746 | } |
1747 | ||
02f1175c | 1748 | static void cyz_handle_cmd(struct cyclades_card *cinfo) |
1da177e4 | 1749 | { |
02f1175c JS |
1750 | struct tty_struct *tty; |
1751 | struct cyclades_port *info; | |
1752 | static volatile struct FIRM_ID __iomem *firm_id; | |
1753 | static volatile struct ZFW_CTRL __iomem *zfw_ctrl; | |
1754 | static volatile struct BOARD_CTRL __iomem *board_ctrl; | |
1755 | static volatile struct CH_CTRL __iomem *ch_ctrl; | |
1756 | static volatile struct BUF_CTRL __iomem *buf_ctrl; | |
1757 | uclong channel; | |
1758 | ucchar cmd; | |
1759 | uclong param; | |
1760 | uclong hw_ver, fw_ver; | |
1761 | int special_count; | |
1762 | int delta_count; | |
1763 | ||
1764 | firm_id = cinfo->base_addr + ID_ADDRESS; | |
1765 | zfw_ctrl = cinfo->base_addr + (cy_readl(&firm_id->zfwctrl_addr) & | |
1766 | 0xfffff); | |
1767 | board_ctrl = &zfw_ctrl->board_ctrl; | |
1768 | fw_ver = cy_readl(&board_ctrl->fw_version); | |
1769 | hw_ver = cy_readl(&((struct RUNTIME_9060 __iomem *)(cinfo->ctl_addr))-> | |
1770 | mail_box_0); | |
1771 | ||
1772 | while (cyz_fetch_msg(cinfo, &channel, &cmd, ¶m) == 1) { | |
1773 | special_count = 0; | |
1774 | delta_count = 0; | |
1775 | info = &cy_port[channel + cinfo->first_line]; | |
1776 | if ((tty = info->tty) == 0) { | |
1777 | continue; | |
1da177e4 | 1778 | } |
02f1175c JS |
1779 | ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]); |
1780 | buf_ctrl = &(zfw_ctrl->buf_ctrl[channel]); | |
1781 | ||
1782 | switch (cmd) { | |
1783 | case C_CM_PR_ERROR: | |
1784 | tty_insert_flip_char(tty, 0, TTY_PARITY); | |
1785 | info->icount.rx++; | |
1786 | special_count++; | |
1787 | break; | |
1788 | case C_CM_FR_ERROR: | |
1789 | tty_insert_flip_char(tty, 0, TTY_FRAME); | |
1790 | info->icount.rx++; | |
1791 | special_count++; | |
1792 | break; | |
1793 | case C_CM_RXBRK: | |
1794 | tty_insert_flip_char(tty, 0, TTY_BREAK); | |
1795 | info->icount.rx++; | |
1796 | special_count++; | |
1797 | break; | |
1798 | case C_CM_MDCD: | |
1799 | info->icount.dcd++; | |
1800 | delta_count++; | |
1801 | if (info->flags & ASYNC_CHECK_CD) { | |
1802 | if ((fw_ver > 241 ? ((u_long) param) : | |
1803 | cy_readl(&ch_ctrl->rs_status)) & | |
1804 | C_RS_DCD) { | |
1805 | cy_sched_event(info, | |
1806 | Cy_EVENT_OPEN_WAKEUP); | |
1807 | } else { | |
1808 | cy_sched_event(info, Cy_EVENT_HANGUP); | |
1809 | } | |
1810 | } | |
1811 | break; | |
1812 | case C_CM_MCTS: | |
1813 | info->icount.cts++; | |
1814 | delta_count++; | |
1815 | break; | |
1816 | case C_CM_MRI: | |
1817 | info->icount.rng++; | |
1818 | delta_count++; | |
1819 | break; | |
1820 | case C_CM_MDSR: | |
1821 | info->icount.dsr++; | |
1822 | delta_count++; | |
1823 | break; | |
1da177e4 | 1824 | #ifdef Z_WAKE |
02f1175c JS |
1825 | case C_CM_IOCTLW: |
1826 | cy_sched_event(info, Cy_EVENT_SHUTDOWN_WAKEUP); | |
1827 | break; | |
1da177e4 LT |
1828 | #endif |
1829 | #ifdef CONFIG_CYZ_INTR | |
02f1175c JS |
1830 | case C_CM_RXHIWM: |
1831 | case C_CM_RXNNDT: | |
1832 | case C_CM_INTBACK2: | |
1833 | /* Reception Interrupt */ | |
1da177e4 | 1834 | #ifdef CY_DEBUG_INTERRUPTS |
02f1175c JS |
1835 | printk("cyz_interrupt: rcvd intr, card %d, " |
1836 | "port %ld\n\r", info->card, channel); | |
1da177e4 | 1837 | #endif |
02f1175c JS |
1838 | cyz_handle_rx(info, ch_ctrl, buf_ctrl); |
1839 | break; | |
1840 | case C_CM_TXBEMPTY: | |
1841 | case C_CM_TXLOWWM: | |
1842 | case C_CM_INTBACK: | |
1843 | /* Transmission Interrupt */ | |
1da177e4 | 1844 | #ifdef CY_DEBUG_INTERRUPTS |
02f1175c JS |
1845 | printk("cyz_interrupt: xmit intr, card %d, " |
1846 | "port %ld\n\r", info->card, channel); | |
1da177e4 | 1847 | #endif |
02f1175c JS |
1848 | cyz_handle_tx(info, ch_ctrl, buf_ctrl); |
1849 | break; | |
1850 | #endif /* CONFIG_CYZ_INTR */ | |
1851 | case C_CM_FATAL: | |
1852 | /* should do something with this !!! */ | |
1853 | break; | |
1854 | default: | |
1855 | break; | |
1856 | } | |
1857 | if (delta_count) | |
1858 | cy_sched_event(info, Cy_EVENT_DELTA_WAKEUP); | |
1859 | if (special_count) | |
1860 | tty_schedule_flip(tty); | |
1da177e4 | 1861 | } |
1da177e4 LT |
1862 | } |
1863 | ||
1864 | #ifdef CONFIG_CYZ_INTR | |
02f1175c | 1865 | static irqreturn_t cyz_interrupt(int irq, void *dev_id) |
1da177e4 | 1866 | { |
02f1175c | 1867 | struct cyclades_card *cinfo; |
1da177e4 | 1868 | |
02f1175c | 1869 | if ((cinfo = (struct cyclades_card *)dev_id) == 0) { |
1da177e4 | 1870 | #ifdef CY_DEBUG_INTERRUPTS |
02f1175c | 1871 | printk("cyz_interrupt: spurious interrupt %d\n\r", irq); |
1da177e4 | 1872 | #endif |
02f1175c JS |
1873 | return IRQ_NONE; /* spurious interrupt */ |
1874 | } | |
1da177e4 | 1875 | |
02f1175c | 1876 | if (!ISZLOADED(*cinfo)) { |
1da177e4 | 1877 | #ifdef CY_DEBUG_INTERRUPTS |
02f1175c | 1878 | printk("cyz_interrupt: board not yet loaded (IRQ%d).\n\r", irq); |
1da177e4 | 1879 | #endif |
02f1175c JS |
1880 | return IRQ_NONE; |
1881 | } | |
1da177e4 | 1882 | |
02f1175c JS |
1883 | /* Handle the interrupts */ |
1884 | cyz_handle_cmd(cinfo); | |
1da177e4 | 1885 | |
02f1175c JS |
1886 | return IRQ_HANDLED; |
1887 | } /* cyz_interrupt */ | |
1da177e4 | 1888 | |
02f1175c | 1889 | static void cyz_rx_restart(unsigned long arg) |
1da177e4 | 1890 | { |
02f1175c JS |
1891 | struct cyclades_port *info = (struct cyclades_port *)arg; |
1892 | int retval; | |
1893 | int card = info->card; | |
1894 | uclong channel = (info->line) - (cy_card[card].first_line); | |
1895 | unsigned long flags; | |
1896 | ||
1897 | CY_LOCK(info, flags); | |
1898 | retval = cyz_issue_cmd(&cy_card[card], channel, C_CM_INTBACK2, 0L); | |
1899 | if (retval != 0) { | |
1900 | printk("cyc:cyz_rx_restart retval on ttyC%d was %x\n", | |
1901 | info->line, retval); | |
1902 | } | |
1903 | cyz_rx_full_timer[info->line].function = NULL; | |
1904 | CY_UNLOCK(info, flags); | |
1da177e4 LT |
1905 | } |
1906 | ||
02f1175c | 1907 | #else /* CONFIG_CYZ_INTR */ |
1da177e4 | 1908 | |
02f1175c | 1909 | static void cyz_poll(unsigned long arg) |
1da177e4 | 1910 | { |
02f1175c JS |
1911 | struct cyclades_card *cinfo; |
1912 | struct cyclades_port *info; | |
1913 | struct tty_struct *tty; | |
1914 | static volatile struct FIRM_ID *firm_id; | |
1915 | static volatile struct ZFW_CTRL *zfw_ctrl; | |
1916 | static volatile struct BOARD_CTRL *board_ctrl; | |
1917 | static volatile struct CH_CTRL *ch_ctrl; | |
1918 | static volatile struct BUF_CTRL *buf_ctrl; | |
1919 | int card, port; | |
1da177e4 | 1920 | |
02f1175c JS |
1921 | cyz_timerlist.expires = jiffies + (HZ); |
1922 | for (card = 0; card < NR_CARDS; card++) { | |
1923 | cinfo = &cy_card[card]; | |
1924 | ||
1925 | if (!IS_CYC_Z(*cinfo)) | |
1926 | continue; | |
1927 | if (!ISZLOADED(*cinfo)) | |
1928 | continue; | |
1929 | ||
1930 | firm_id = cinfo->base_addr + ID_ADDRESS; | |
1931 | zfw_ctrl = cinfo->base_addr + | |
1932 | (cy_readl(&firm_id->zfwctrl_addr) & 0xfffff); | |
1933 | board_ctrl = &(zfw_ctrl->board_ctrl); | |
1da177e4 LT |
1934 | |
1935 | /* Skip first polling cycle to avoid racing conditions with the FW */ | |
02f1175c JS |
1936 | if (!cinfo->intr_enabled) { |
1937 | cinfo->nports = (int)cy_readl(&board_ctrl->n_channel); | |
1938 | cinfo->intr_enabled = 1; | |
1939 | continue; | |
1940 | } | |
1da177e4 | 1941 | |
02f1175c | 1942 | cyz_handle_cmd(cinfo); |
1da177e4 | 1943 | |
02f1175c JS |
1944 | for (port = 0; port < cinfo->nports; port++) { |
1945 | info = &cy_port[port + cinfo->first_line]; | |
1946 | tty = info->tty; | |
1947 | ch_ctrl = &(zfw_ctrl->ch_ctrl[port]); | |
1948 | buf_ctrl = &(zfw_ctrl->buf_ctrl[port]); | |
1da177e4 | 1949 | |
02f1175c JS |
1950 | if (!info->throttle) |
1951 | cyz_handle_rx(info, ch_ctrl, buf_ctrl); | |
1952 | cyz_handle_tx(info, ch_ctrl, buf_ctrl); | |
1953 | } | |
1954 | /* poll every 'cyz_polling_cycle' period */ | |
1955 | cyz_timerlist.expires = jiffies + cyz_polling_cycle; | |
1da177e4 | 1956 | } |
02f1175c | 1957 | add_timer(&cyz_timerlist); |
02f1175c | 1958 | } /* cyz_poll */ |
1da177e4 | 1959 | |
02f1175c | 1960 | #endif /* CONFIG_CYZ_INTR */ |
1da177e4 LT |
1961 | |
1962 | /********** End of block of Cyclades-Z specific code *********/ | |
1963 | /***********************************************************/ | |
1964 | ||
1da177e4 LT |
1965 | /* This is called whenever a port becomes active; |
1966 | interrupts are enabled and DTR & RTS are turned on. | |
1967 | */ | |
02f1175c | 1968 | static int startup(struct cyclades_port *info) |
1da177e4 | 1969 | { |
02f1175c JS |
1970 | unsigned long flags; |
1971 | int retval = 0; | |
1972 | void __iomem *base_addr; | |
1973 | int card, chip, channel, index; | |
1974 | unsigned long page; | |
1da177e4 | 1975 | |
02f1175c JS |
1976 | card = info->card; |
1977 | channel = (info->line) - (cy_card[card].first_line); | |
1da177e4 | 1978 | |
02f1175c JS |
1979 | page = get_zeroed_page(GFP_KERNEL); |
1980 | if (!page) | |
1981 | return -ENOMEM; | |
1da177e4 | 1982 | |
02f1175c | 1983 | CY_LOCK(info, flags); |
1da177e4 | 1984 | |
02f1175c JS |
1985 | if (info->flags & ASYNC_INITIALIZED) { |
1986 | free_page(page); | |
1987 | goto errout; | |
1988 | } | |
1da177e4 | 1989 | |
02f1175c JS |
1990 | if (!info->type) { |
1991 | if (info->tty) { | |
1992 | set_bit(TTY_IO_ERROR, &info->tty->flags); | |
1993 | } | |
1994 | free_page(page); | |
1995 | goto errout; | |
1996 | } | |
1da177e4 | 1997 | |
02f1175c JS |
1998 | if (info->xmit_buf) |
1999 | free_page(page); | |
2000 | else | |
2001 | info->xmit_buf = (unsigned char *)page; | |
1da177e4 | 2002 | |
02f1175c | 2003 | CY_UNLOCK(info, flags); |
1da177e4 | 2004 | |
02f1175c | 2005 | set_line_char(info); |
1da177e4 | 2006 | |
02f1175c JS |
2007 | if (!IS_CYC_Z(cy_card[card])) { |
2008 | chip = channel >> 2; | |
2009 | channel &= 0x03; | |
2010 | index = cy_card[card].bus_index; | |
2011 | base_addr = cy_card[card].base_addr + | |
2012 | (cy_chip_offset[chip] << index); | |
1da177e4 LT |
2013 | |
2014 | #ifdef CY_DEBUG_OPEN | |
02f1175c JS |
2015 | printk("cyc startup card %d, chip %d, channel %d, " |
2016 | "base_addr %lx\n", | |
2017 | card, chip, channel, (long)base_addr); | |
2018 | /**/ | |
1da177e4 | 2019 | #endif |
02f1175c | 2020 | CY_LOCK(info, flags); |
1da177e4 | 2021 | |
02f1175c | 2022 | cy_writeb(base_addr + (CyCAR << index), (u_char) channel); |
1da177e4 | 2023 | |
02f1175c JS |
2024 | cy_writeb(base_addr + (CyRTPR << index), |
2025 | (info->default_timeout ? info->default_timeout : 0x02)); | |
2026 | /* 10ms rx timeout */ | |
1da177e4 | 2027 | |
02f1175c JS |
2028 | cyy_issue_cmd(base_addr, CyCHAN_CTL | CyENB_RCVR | CyENB_XMTR, |
2029 | index); | |
1da177e4 | 2030 | |
02f1175c JS |
2031 | cy_writeb(base_addr + (CyCAR << index), (u_char) channel); |
2032 | cy_writeb(base_addr + (CyMSVR1 << index), CyRTS); | |
2033 | cy_writeb(base_addr + (CyMSVR2 << index), CyDTR); | |
1da177e4 LT |
2034 | |
2035 | #ifdef CY_DEBUG_DTR | |
02f1175c JS |
2036 | printk("cyc:startup raising DTR\n"); |
2037 | printk(" status: 0x%x, 0x%x\n", | |
2038 | cy_readb(base_addr + (CyMSVR1 << index)), | |
2039 | cy_readb(base_addr + (CyMSVR2 << index))); | |
1da177e4 LT |
2040 | #endif |
2041 | ||
02f1175c JS |
2042 | cy_writeb(base_addr + (CySRER << index), |
2043 | cy_readb(base_addr + (CySRER << index)) | CyRxData); | |
2044 | info->flags |= ASYNC_INITIALIZED; | |
1da177e4 | 2045 | |
02f1175c JS |
2046 | if (info->tty) { |
2047 | clear_bit(TTY_IO_ERROR, &info->tty->flags); | |
2048 | } | |
2049 | info->xmit_cnt = info->xmit_head = info->xmit_tail = 0; | |
2050 | info->breakon = info->breakoff = 0; | |
2051 | memset((char *)&info->idle_stats, 0, sizeof(info->idle_stats)); | |
2052 | info->idle_stats.in_use = | |
2053 | info->idle_stats.recv_idle = | |
2054 | info->idle_stats.xmit_idle = jiffies; | |
1da177e4 | 2055 | |
02f1175c | 2056 | CY_UNLOCK(info, flags); |
1da177e4 | 2057 | |
02f1175c JS |
2058 | } else { |
2059 | struct FIRM_ID __iomem *firm_id; | |
2060 | struct ZFW_CTRL __iomem *zfw_ctrl; | |
2061 | struct BOARD_CTRL __iomem *board_ctrl; | |
2062 | struct CH_CTRL __iomem *ch_ctrl; | |
2063 | int retval; | |
1da177e4 | 2064 | |
02f1175c | 2065 | base_addr = cy_card[card].base_addr; |
1da177e4 | 2066 | |
02f1175c JS |
2067 | firm_id = base_addr + ID_ADDRESS; |
2068 | if (!ISZLOADED(cy_card[card])) { | |
2069 | return -ENODEV; | |
2070 | } | |
1da177e4 | 2071 | |
02f1175c JS |
2072 | zfw_ctrl = cy_card[card].base_addr + |
2073 | (cy_readl(&firm_id->zfwctrl_addr) & 0xfffff); | |
2074 | board_ctrl = &zfw_ctrl->board_ctrl; | |
2075 | ch_ctrl = zfw_ctrl->ch_ctrl; | |
1da177e4 LT |
2076 | |
2077 | #ifdef CY_DEBUG_OPEN | |
02f1175c JS |
2078 | printk("cyc startup Z card %d, channel %d, base_addr %lx\n", |
2079 | card, channel, (long)base_addr); | |
2080 | /**/ | |
1da177e4 | 2081 | #endif |
02f1175c | 2082 | CY_LOCK(info, flags); |
1da177e4 | 2083 | |
02f1175c | 2084 | cy_writel(&ch_ctrl[channel].op_mode, C_CH_ENABLE); |
1da177e4 LT |
2085 | #ifdef Z_WAKE |
2086 | #ifdef CONFIG_CYZ_INTR | |
02f1175c JS |
2087 | cy_writel(&ch_ctrl[channel].intr_enable, |
2088 | C_IN_TXBEMPTY | C_IN_TXLOWWM | C_IN_RXHIWM | | |
2089 | C_IN_RXNNDT | C_IN_IOCTLW | C_IN_MDCD); | |
1da177e4 | 2090 | #else |
02f1175c JS |
2091 | cy_writel(&ch_ctrl[channel].intr_enable, |
2092 | C_IN_IOCTLW | C_IN_MDCD); | |
2093 | #endif /* CONFIG_CYZ_INTR */ | |
1da177e4 LT |
2094 | #else |
2095 | #ifdef CONFIG_CYZ_INTR | |
02f1175c JS |
2096 | cy_writel(&ch_ctrl[channel].intr_enable, |
2097 | C_IN_TXBEMPTY | C_IN_TXLOWWM | C_IN_RXHIWM | | |
2098 | C_IN_RXNNDT | C_IN_MDCD); | |
1da177e4 | 2099 | #else |
02f1175c JS |
2100 | cy_writel(&ch_ctrl[channel].intr_enable, C_IN_MDCD); |
2101 | #endif /* CONFIG_CYZ_INTR */ | |
2102 | #endif /* Z_WAKE */ | |
2103 | ||
2104 | retval = cyz_issue_cmd(&cy_card[card], channel, C_CM_IOCTL, 0L); | |
2105 | if (retval != 0) { | |
2106 | printk("cyc:startup(1) retval on ttyC%d was %x\n", | |
2107 | info->line, retval); | |
2108 | } | |
1da177e4 | 2109 | |
02f1175c JS |
2110 | /* Flush RX buffers before raising DTR and RTS */ |
2111 | retval = cyz_issue_cmd(&cy_card[card], channel, C_CM_FLUSH_RX, | |
2112 | 0L); | |
2113 | if (retval != 0) { | |
2114 | printk("cyc:startup(2) retval on ttyC%d was %x\n", | |
2115 | info->line, retval); | |
2116 | } | |
1da177e4 | 2117 | |
02f1175c JS |
2118 | /* set timeout !!! */ |
2119 | /* set RTS and DTR !!! */ | |
2120 | cy_writel(&ch_ctrl[channel].rs_control, | |
2121 | cy_readl(&ch_ctrl[channel].rs_control) | C_RS_RTS | | |
2122 | C_RS_DTR); | |
2123 | retval = cyz_issue_cmd(&cy_card[info->card], channel, | |
2124 | C_CM_IOCTLM, 0L); | |
2125 | if (retval != 0) { | |
2126 | printk("cyc:startup(3) retval on ttyC%d was %x\n", | |
2127 | info->line, retval); | |
2128 | } | |
1da177e4 | 2129 | #ifdef CY_DEBUG_DTR |
02f1175c | 2130 | printk("cyc:startup raising Z DTR\n"); |
1da177e4 LT |
2131 | #endif |
2132 | ||
02f1175c JS |
2133 | /* enable send, recv, modem !!! */ |
2134 | ||
2135 | info->flags |= ASYNC_INITIALIZED; | |
2136 | if (info->tty) { | |
2137 | clear_bit(TTY_IO_ERROR, &info->tty->flags); | |
2138 | } | |
2139 | info->xmit_cnt = info->xmit_head = info->xmit_tail = 0; | |
2140 | info->breakon = info->breakoff = 0; | |
2141 | memset((char *)&info->idle_stats, 0, sizeof(info->idle_stats)); | |
2142 | info->idle_stats.in_use = | |
2143 | info->idle_stats.recv_idle = | |
2144 | info->idle_stats.xmit_idle = jiffies; | |
1da177e4 | 2145 | |
02f1175c | 2146 | CY_UNLOCK(info, flags); |
1da177e4 | 2147 | } |
1da177e4 LT |
2148 | |
2149 | #ifdef CY_DEBUG_OPEN | |
2150 | printk(" cyc startup done\n"); | |
2151 | #endif | |
2152 | return 0; | |
2153 | ||
2154 | errout: | |
2155 | CY_UNLOCK(info, flags); | |
2156 | return retval; | |
02f1175c | 2157 | } /* startup */ |
1da177e4 | 2158 | |
02f1175c | 2159 | static void start_xmit(struct cyclades_port *info) |
1da177e4 | 2160 | { |
02f1175c JS |
2161 | unsigned long flags; |
2162 | void __iomem *base_addr; | |
2163 | int card, chip, channel, index; | |
1da177e4 | 2164 | |
02f1175c JS |
2165 | card = info->card; |
2166 | channel = (info->line) - (cy_card[card].first_line); | |
2167 | if (!IS_CYC_Z(cy_card[card])) { | |
2168 | chip = channel >> 2; | |
2169 | channel &= 0x03; | |
2170 | index = cy_card[card].bus_index; | |
2171 | base_addr = cy_card[card].base_addr + | |
2172 | (cy_chip_offset[chip] << index); | |
2173 | ||
2174 | CY_LOCK(info, flags); | |
2175 | cy_writeb(base_addr + (CyCAR << index), channel); | |
2176 | cy_writeb(base_addr + (CySRER << index), | |
2177 | cy_readb(base_addr + (CySRER << index)) | CyTxRdy); | |
2178 | CY_UNLOCK(info, flags); | |
2179 | } else { | |
1da177e4 | 2180 | #ifdef CONFIG_CYZ_INTR |
02f1175c | 2181 | int retval; |
1da177e4 | 2182 | |
02f1175c JS |
2183 | CY_LOCK(info, flags); |
2184 | retval = cyz_issue_cmd(&cy_card[card], channel, C_CM_INTBACK, | |
2185 | 0L); | |
2186 | if (retval != 0) { | |
2187 | printk("cyc:start_xmit retval on ttyC%d was %x\n", | |
2188 | info->line, retval); | |
2189 | } | |
2190 | CY_UNLOCK(info, flags); | |
2191 | #else /* CONFIG_CYZ_INTR */ | |
2192 | /* Don't have to do anything at this time */ | |
2193 | #endif /* CONFIG_CYZ_INTR */ | |
2194 | } | |
2195 | } /* start_xmit */ | |
1da177e4 LT |
2196 | |
2197 | /* | |
2198 | * This routine shuts down a serial port; interrupts are disabled, | |
2199 | * and DTR is dropped if the hangup on close termio flag is on. | |
2200 | */ | |
02f1175c | 2201 | static void shutdown(struct cyclades_port *info) |
1da177e4 | 2202 | { |
02f1175c JS |
2203 | unsigned long flags; |
2204 | void __iomem *base_addr; | |
2205 | int card, chip, channel, index; | |
2206 | ||
2207 | if (!(info->flags & ASYNC_INITIALIZED)) { | |
2208 | return; | |
2209 | } | |
2210 | ||
2211 | card = info->card; | |
2212 | channel = info->line - cy_card[card].first_line; | |
2213 | if (!IS_CYC_Z(cy_card[card])) { | |
2214 | chip = channel >> 2; | |
2215 | channel &= 0x03; | |
2216 | index = cy_card[card].bus_index; | |
2217 | base_addr = cy_card[card].base_addr + | |
2218 | (cy_chip_offset[chip] << index); | |
1da177e4 LT |
2219 | |
2220 | #ifdef CY_DEBUG_OPEN | |
02f1175c JS |
2221 | printk("cyc shutdown Y card %d, chip %d, channel %d, " |
2222 | "base_addr %lx\n", | |
2223 | card, chip, channel, (long)base_addr); | |
1da177e4 LT |
2224 | #endif |
2225 | ||
02f1175c JS |
2226 | CY_LOCK(info, flags); |
2227 | ||
2228 | /* Clear delta_msr_wait queue to avoid mem leaks. */ | |
2229 | wake_up_interruptible(&info->delta_msr_wait); | |
1da177e4 | 2230 | |
02f1175c JS |
2231 | if (info->xmit_buf) { |
2232 | unsigned char *temp; | |
2233 | temp = info->xmit_buf; | |
2234 | info->xmit_buf = NULL; | |
2235 | free_page((unsigned long)temp); | |
2236 | } | |
2237 | cy_writeb(base_addr + (CyCAR << index), (u_char) channel); | |
2238 | if (!info->tty || (info->tty->termios->c_cflag & HUPCL)) { | |
2239 | cy_writeb(base_addr + (CyMSVR1 << index), ~CyRTS); | |
2240 | cy_writeb(base_addr + (CyMSVR2 << index), ~CyDTR); | |
1da177e4 | 2241 | #ifdef CY_DEBUG_DTR |
02f1175c JS |
2242 | printk("cyc shutdown dropping DTR\n"); |
2243 | printk(" status: 0x%x, 0x%x\n", | |
2244 | cy_readb(base_addr + (CyMSVR1 << index)), | |
2245 | cy_readb(base_addr + (CyMSVR2 << index))); | |
1da177e4 | 2246 | #endif |
02f1175c JS |
2247 | } |
2248 | cyy_issue_cmd(base_addr, CyCHAN_CTL | CyDIS_RCVR, index); | |
2249 | /* it may be appropriate to clear _XMIT at | |
2250 | some later date (after testing)!!! */ | |
2251 | ||
2252 | if (info->tty) { | |
2253 | set_bit(TTY_IO_ERROR, &info->tty->flags); | |
2254 | } | |
2255 | info->flags &= ~ASYNC_INITIALIZED; | |
2256 | CY_UNLOCK(info, flags); | |
2257 | } else { | |
2258 | struct FIRM_ID __iomem *firm_id; | |
2259 | struct ZFW_CTRL __iomem *zfw_ctrl; | |
2260 | struct BOARD_CTRL __iomem *board_ctrl; | |
2261 | struct CH_CTRL __iomem *ch_ctrl; | |
2262 | int retval; | |
2263 | ||
2264 | base_addr = cy_card[card].base_addr; | |
1da177e4 | 2265 | #ifdef CY_DEBUG_OPEN |
02f1175c JS |
2266 | printk("cyc shutdown Z card %d, channel %d, base_addr %lx\n", |
2267 | card, channel, (long)base_addr); | |
1da177e4 LT |
2268 | #endif |
2269 | ||
02f1175c JS |
2270 | firm_id = base_addr + ID_ADDRESS; |
2271 | if (!ISZLOADED(cy_card[card])) { | |
2272 | return; | |
2273 | } | |
1da177e4 | 2274 | |
02f1175c JS |
2275 | zfw_ctrl = cy_card[card].base_addr + |
2276 | (cy_readl(&firm_id->zfwctrl_addr) & 0xfffff); | |
2277 | board_ctrl = &zfw_ctrl->board_ctrl; | |
2278 | ch_ctrl = zfw_ctrl->ch_ctrl; | |
1da177e4 | 2279 | |
02f1175c | 2280 | CY_LOCK(info, flags); |
1da177e4 | 2281 | |
02f1175c JS |
2282 | if (info->xmit_buf) { |
2283 | unsigned char *temp; | |
2284 | temp = info->xmit_buf; | |
2285 | info->xmit_buf = NULL; | |
2286 | free_page((unsigned long)temp); | |
1da177e4 | 2287 | } |
02f1175c JS |
2288 | |
2289 | if (!info->tty || (info->tty->termios->c_cflag & HUPCL)) { | |
2290 | cy_writel(&ch_ctrl[channel].rs_control, | |
2291 | (uclong)(cy_readl(&ch_ctrl[channel].rs_control)& | |
2292 | ~(C_RS_RTS | C_RS_DTR))); | |
2293 | retval = cyz_issue_cmd(&cy_card[info->card], channel, | |
2294 | C_CM_IOCTLM, 0L); | |
2295 | if (retval != 0) { | |
2296 | printk("cyc:shutdown retval on ttyC%d was %x\n", | |
2297 | info->line, retval); | |
2298 | } | |
1da177e4 | 2299 | #ifdef CY_DEBUG_DTR |
02f1175c | 2300 | printk("cyc:shutdown dropping Z DTR\n"); |
1da177e4 | 2301 | #endif |
02f1175c | 2302 | } |
1da177e4 | 2303 | |
02f1175c JS |
2304 | if (info->tty) { |
2305 | set_bit(TTY_IO_ERROR, &info->tty->flags); | |
2306 | } | |
2307 | info->flags &= ~ASYNC_INITIALIZED; | |
2308 | ||
2309 | CY_UNLOCK(info, flags); | |
2310 | } | |
1da177e4 LT |
2311 | |
2312 | #ifdef CY_DEBUG_OPEN | |
02f1175c | 2313 | printk(" cyc shutdown done\n"); |
1da177e4 | 2314 | #endif |
02f1175c | 2315 | } /* shutdown */ |
1da177e4 LT |
2316 | |
2317 | /* | |
2318 | * ------------------------------------------------------------ | |
2319 | * cy_open() and friends | |
2320 | * ------------------------------------------------------------ | |
2321 | */ | |
2322 | ||
2323 | static int | |
02f1175c JS |
2324 | block_til_ready(struct tty_struct *tty, struct file *filp, |
2325 | struct cyclades_port *info) | |
1da177e4 | 2326 | { |
02f1175c JS |
2327 | DECLARE_WAITQUEUE(wait, current); |
2328 | struct cyclades_card *cinfo; | |
2329 | unsigned long flags; | |
2330 | int chip, channel, index; | |
2331 | int retval; | |
2332 | void __iomem *base_addr; | |
2333 | ||
2334 | cinfo = &cy_card[info->card]; | |
2335 | channel = info->line - cinfo->first_line; | |
2336 | ||
2337 | /* | |
2338 | * If the device is in the middle of being closed, then block | |
2339 | * until it's done, and then try again. | |
2340 | */ | |
2341 | if (tty_hung_up_p(filp) || (info->flags & ASYNC_CLOSING)) { | |
2342 | if (info->flags & ASYNC_CLOSING) { | |
2343 | interruptible_sleep_on(&info->close_wait); | |
2344 | } | |
096dcfce | 2345 | return (info->flags & ASYNC_HUP_NOTIFY) ? -EAGAIN: -ERESTARTSYS; |
1da177e4 | 2346 | } |
02f1175c JS |
2347 | |
2348 | /* | |
2349 | * If non-blocking mode is set, then make the check up front | |
2350 | * and then exit. | |
2351 | */ | |
2352 | if ((filp->f_flags & O_NONBLOCK) || (tty->flags & (1 << TTY_IO_ERROR))) { | |
2353 | info->flags |= ASYNC_NORMAL_ACTIVE; | |
2354 | return 0; | |
2355 | } | |
2356 | ||
2357 | /* | |
2358 | * Block waiting for the carrier detect and the line to become | |
2359 | * free (i.e., not in use by the callout). While we are in | |
2360 | * this loop, info->count is dropped by one, so that | |
2361 | * cy_close() knows when to free things. We restore it upon | |
2362 | * exit, either normal or abnormal. | |
2363 | */ | |
2364 | retval = 0; | |
2365 | add_wait_queue(&info->open_wait, &wait); | |
1da177e4 | 2366 | #ifdef CY_DEBUG_OPEN |
02f1175c JS |
2367 | printk("cyc block_til_ready before block: ttyC%d, count = %d\n", |
2368 | info->line, info->count); | |
2369 | /**/ | |
1da177e4 | 2370 | #endif |
02f1175c JS |
2371 | CY_LOCK(info, flags); |
2372 | if (!tty_hung_up_p(filp)) | |
2373 | info->count--; | |
2374 | CY_UNLOCK(info, flags); | |
1da177e4 | 2375 | #ifdef CY_DEBUG_COUNT |
02f1175c JS |
2376 | printk("cyc block_til_ready: (%d): decrementing count to %d\n", |
2377 | current->pid, info->count); | |
1da177e4 | 2378 | #endif |
02f1175c JS |
2379 | info->blocked_open++; |
2380 | ||
2381 | if (!IS_CYC_Z(*cinfo)) { | |
2382 | chip = channel >> 2; | |
2383 | channel &= 0x03; | |
2384 | index = cinfo->bus_index; | |
2385 | base_addr = cinfo->base_addr + (cy_chip_offset[chip] << index); | |
2386 | ||
2387 | while (1) { | |
2388 | CY_LOCK(info, flags); | |
2389 | if ((tty->termios->c_cflag & CBAUD)) { | |
2390 | cy_writeb(base_addr + (CyCAR << index), | |
2391 | (u_char) channel); | |
2392 | cy_writeb(base_addr + (CyMSVR1 << index), | |
2393 | CyRTS); | |
2394 | cy_writeb(base_addr + (CyMSVR2 << index), | |
2395 | CyDTR); | |
1da177e4 | 2396 | #ifdef CY_DEBUG_DTR |
02f1175c JS |
2397 | printk("cyc:block_til_ready raising DTR\n"); |
2398 | printk(" status: 0x%x, 0x%x\n", | |
2399 | cy_readb(base_addr + | |
2400 | (CyMSVR1 << index)), | |
2401 | cy_readb(base_addr + | |
2402 | (CyMSVR2 << index))); | |
1da177e4 | 2403 | #endif |
02f1175c JS |
2404 | } |
2405 | CY_UNLOCK(info, flags); | |
1da177e4 | 2406 | |
02f1175c JS |
2407 | set_current_state(TASK_INTERRUPTIBLE); |
2408 | if (tty_hung_up_p(filp) || | |
2409 | !(info->flags & ASYNC_INITIALIZED)) { | |
2410 | retval = ((info->flags & ASYNC_HUP_NOTIFY) ? | |
2411 | -EAGAIN : -ERESTARTSYS); | |
2412 | break; | |
2413 | } | |
1da177e4 | 2414 | |
02f1175c JS |
2415 | CY_LOCK(info, flags); |
2416 | cy_writeb(base_addr + (CyCAR << index), | |
2417 | (u_char) channel); | |
2418 | if (!(info->flags & ASYNC_CLOSING) && (C_CLOCAL(tty) || | |
2419 | (cy_readb(base_addr + | |
2420 | (CyMSVR1 << index)) & CyDCD))) { | |
2421 | CY_UNLOCK(info, flags); | |
2422 | break; | |
2423 | } | |
1da177e4 | 2424 | CY_UNLOCK(info, flags); |
1da177e4 | 2425 | |
02f1175c JS |
2426 | if (signal_pending(current)) { |
2427 | retval = -ERESTARTSYS; | |
2428 | break; | |
2429 | } | |
1da177e4 | 2430 | #ifdef CY_DEBUG_OPEN |
02f1175c JS |
2431 | printk("cyc block_til_ready blocking: ttyC%d, " |
2432 | "count = %d\n", | |
2433 | info->line, info->count); | |
2434 | /**/ | |
1da177e4 | 2435 | #endif |
02f1175c | 2436 | schedule(); |
1da177e4 | 2437 | } |
02f1175c JS |
2438 | } else { |
2439 | struct FIRM_ID __iomem *firm_id; | |
2440 | struct ZFW_CTRL __iomem *zfw_ctrl; | |
2441 | struct BOARD_CTRL __iomem *board_ctrl; | |
2442 | struct CH_CTRL __iomem *ch_ctrl; | |
2443 | int retval; | |
2444 | ||
2445 | base_addr = cinfo->base_addr; | |
2446 | firm_id = base_addr + ID_ADDRESS; | |
2447 | if (!ISZLOADED(*cinfo)) { | |
2448 | current->state = TASK_RUNNING; | |
2449 | remove_wait_queue(&info->open_wait, &wait); | |
2450 | return -EINVAL; | |
2451 | } | |
2452 | ||
2453 | zfw_ctrl = base_addr + (cy_readl(&firm_id->zfwctrl_addr) & | |
2454 | 0xfffff); | |
2455 | board_ctrl = &zfw_ctrl->board_ctrl; | |
2456 | ch_ctrl = zfw_ctrl->ch_ctrl; | |
2457 | ||
2458 | while (1) { | |
2459 | if ((tty->termios->c_cflag & CBAUD)) { | |
2460 | cy_writel(&ch_ctrl[channel].rs_control, | |
2461 | cy_readl(&ch_ctrl[channel]. | |
2462 | rs_control) | (C_RS_RTS | | |
2463 | C_RS_DTR)); | |
2464 | retval = cyz_issue_cmd(&cy_card[info->card], | |
2465 | channel, C_CM_IOCTLM, 0L); | |
2466 | if (retval != 0) { | |
2467 | printk("cyc:block_til_ready retval on " | |
2468 | "ttyC%d was %x\n", | |
2469 | info->line, retval); | |
2470 | } | |
1da177e4 | 2471 | #ifdef CY_DEBUG_DTR |
02f1175c | 2472 | printk("cyc:block_til_ready raising Z DTR\n"); |
1da177e4 | 2473 | #endif |
02f1175c | 2474 | } |
1da177e4 | 2475 | |
02f1175c JS |
2476 | set_current_state(TASK_INTERRUPTIBLE); |
2477 | if (tty_hung_up_p(filp) || | |
2478 | !(info->flags & ASYNC_INITIALIZED)) { | |
2479 | retval = ((info->flags & ASYNC_HUP_NOTIFY) ? | |
2480 | -EAGAIN : -ERESTARTSYS); | |
2481 | break; | |
2482 | } | |
2483 | if (!(info->flags & ASYNC_CLOSING) && (C_CLOCAL(tty) || | |
2484 | (cy_readl(&ch_ctrl[channel].rs_status) & | |
2485 | C_RS_DCD))) { | |
2486 | break; | |
2487 | } | |
2488 | if (signal_pending(current)) { | |
2489 | retval = -ERESTARTSYS; | |
2490 | break; | |
2491 | } | |
1da177e4 | 2492 | #ifdef CY_DEBUG_OPEN |
02f1175c JS |
2493 | printk("cyc block_til_ready blocking: ttyC%d, " |
2494 | "count = %d\n", | |
2495 | info->line, info->count); | |
2496 | /**/ | |
1da177e4 | 2497 | #endif |
02f1175c JS |
2498 | schedule(); |
2499 | } | |
1da177e4 | 2500 | } |
02f1175c JS |
2501 | current->state = TASK_RUNNING; |
2502 | remove_wait_queue(&info->open_wait, &wait); | |
2503 | if (!tty_hung_up_p(filp)) { | |
2504 | info->count++; | |
1da177e4 | 2505 | #ifdef CY_DEBUG_COUNT |
02f1175c JS |
2506 | printk("cyc:block_til_ready (%d): incrementing count to %d\n", |
2507 | current->pid, info->count); | |
1da177e4 | 2508 | #endif |
02f1175c JS |
2509 | } |
2510 | info->blocked_open--; | |
1da177e4 | 2511 | #ifdef CY_DEBUG_OPEN |
02f1175c JS |
2512 | printk("cyc:block_til_ready after blocking: ttyC%d, count = %d\n", |
2513 | info->line, info->count); | |
2514 | /**/ | |
1da177e4 | 2515 | #endif |
02f1175c JS |
2516 | if (retval) |
2517 | return retval; | |
2518 | info->flags |= ASYNC_NORMAL_ACTIVE; | |
2519 | return 0; | |
2520 | } /* block_til_ready */ | |
1da177e4 LT |
2521 | |
2522 | /* | |
2523 | * This routine is called whenever a serial port is opened. It | |
2524 | * performs the serial-specific initialization for the tty structure. | |
2525 | */ | |
02f1175c | 2526 | static int cy_open(struct tty_struct *tty, struct file *filp) |
1da177e4 | 2527 | { |
02f1175c JS |
2528 | struct cyclades_port *info; |
2529 | int retval, line; | |
1da177e4 | 2530 | |
02f1175c JS |
2531 | line = tty->index; |
2532 | if ((line < 0) || (NR_PORTS <= line)) { | |
2533 | return -ENODEV; | |
2534 | } | |
2535 | info = &cy_port[line]; | |
2536 | if (info->line < 0) { | |
2537 | return -ENODEV; | |
2538 | } | |
1da177e4 | 2539 | |
02f1175c JS |
2540 | /* If the card's firmware hasn't been loaded, |
2541 | treat it as absent from the system. This | |
2542 | will make the user pay attention. | |
2543 | */ | |
2544 | if (IS_CYC_Z(cy_card[info->card])) { | |
2545 | struct cyclades_card *cinfo = &cy_card[info->card]; | |
2546 | struct FIRM_ID __iomem *firm_id = cinfo->base_addr + ID_ADDRESS; | |
2547 | ||
2548 | if (!ISZLOADED(*cinfo)) { | |
2549 | if (((ZE_V1 == cy_readl( | |
2550 | &((struct RUNTIME_9060 __iomem *) | |
2551 | (cinfo->ctl_addr))->mail_box_0)) && | |
2552 | Z_FPGA_CHECK(*cinfo)) && | |
2553 | (ZFIRM_HLT == cy_readl( | |
2554 | &firm_id->signature))) { | |
2555 | printk("cyc:Cyclades-Z Error: you need an " | |
2556 | "external power supply for this number " | |
2557 | "of ports.\n\rFirmware halted.\r\n"); | |
2558 | } else { | |
2559 | printk("cyc:Cyclades-Z firmware not yet " | |
2560 | "loaded\n"); | |
2561 | } | |
2562 | return -ENODEV; | |
2563 | } | |
2564 | #ifdef CONFIG_CYZ_INTR | |
2565 | else { | |
2566 | /* In case this Z board is operating in interrupt mode, its | |
2567 | interrupts should be enabled as soon as the first open | |
2568 | happens to one of its ports. */ | |
2569 | if (!cinfo->intr_enabled) { | |
2570 | struct ZFW_CTRL __iomem *zfw_ctrl; | |
2571 | struct BOARD_CTRL __iomem *board_ctrl; | |
2572 | ||
2573 | zfw_ctrl = cinfo->base_addr + | |
2574 | (cy_readl(&firm_id->zfwctrl_addr) & | |
2575 | 0xfffff); | |
2576 | ||
2577 | board_ctrl = &zfw_ctrl->board_ctrl; | |
2578 | ||
2579 | /* Enable interrupts on the PLX chip */ | |
2580 | cy_writew(cinfo->ctl_addr + 0x68, | |
2581 | cy_readw(cinfo->ctl_addr + | |
2582 | 0x68) | 0x0900); | |
2583 | /* Enable interrupts on the FW */ | |
2584 | retval = cyz_issue_cmd(cinfo, 0, | |
2585 | C_CM_IRQ_ENBL, 0L); | |
2586 | if (retval != 0) { | |
2587 | printk("cyc:IRQ enable retval was %x\n", | |
2588 | retval); | |
2589 | } | |
2590 | cinfo->nports = | |
2591 | (int)cy_readl(&board_ctrl->n_channel); | |
2592 | cinfo->intr_enabled = 1; | |
2593 | } | |
1da177e4 | 2594 | } |
02f1175c JS |
2595 | #endif /* CONFIG_CYZ_INTR */ |
2596 | /* Make sure this Z port really exists in hardware */ | |
2597 | if (info->line > (cinfo->first_line + cinfo->nports - 1)) | |
2598 | return -ENODEV; | |
1da177e4 | 2599 | } |
1da177e4 | 2600 | #ifdef CY_DEBUG_OTHER |
02f1175c | 2601 | printk("cyc:cy_open ttyC%d\n", info->line); /* */ |
1da177e4 | 2602 | #endif |
02f1175c JS |
2603 | tty->driver_data = info; |
2604 | info->tty = tty; | |
2605 | if (serial_paranoia_check(info, tty->name, "cy_open")) { | |
2606 | return -ENODEV; | |
2607 | } | |
1da177e4 | 2608 | #ifdef CY_DEBUG_OPEN |
02f1175c JS |
2609 | printk("cyc:cy_open ttyC%d, count = %d\n", info->line, info->count); |
2610 | /**/ | |
1da177e4 | 2611 | #endif |
02f1175c | 2612 | info->count++; |
1da177e4 | 2613 | #ifdef CY_DEBUG_COUNT |
02f1175c JS |
2614 | printk("cyc:cy_open (%d): incrementing count to %d\n", |
2615 | current->pid, info->count); | |
1da177e4 | 2616 | #endif |
1da177e4 | 2617 | |
02f1175c JS |
2618 | /* |
2619 | * If the port is the middle of closing, bail out now | |
2620 | */ | |
2621 | if (tty_hung_up_p(filp) || (info->flags & ASYNC_CLOSING)) { | |
2622 | if (info->flags & ASYNC_CLOSING) | |
2623 | interruptible_sleep_on(&info->close_wait); | |
096dcfce | 2624 | return (info->flags & ASYNC_HUP_NOTIFY) ? -EAGAIN: -ERESTARTSYS; |
02f1175c | 2625 | } |
1da177e4 | 2626 | |
02f1175c JS |
2627 | /* |
2628 | * Start up serial port | |
2629 | */ | |
2630 | retval = startup(info); | |
2631 | if (retval) { | |
2632 | return retval; | |
2633 | } | |
1da177e4 | 2634 | |
02f1175c JS |
2635 | retval = block_til_ready(tty, filp, info); |
2636 | if (retval) { | |
1da177e4 | 2637 | #ifdef CY_DEBUG_OPEN |
02f1175c JS |
2638 | printk("cyc:cy_open returning after block_til_ready with %d\n", |
2639 | retval); | |
1da177e4 | 2640 | #endif |
02f1175c JS |
2641 | return retval; |
2642 | } | |
1da177e4 | 2643 | |
02f1175c | 2644 | info->throttle = 0; |
1da177e4 | 2645 | |
02f1175c JS |
2646 | #ifdef CY_DEBUG_OPEN |
2647 | printk(" cyc:cy_open done\n"); | |
2648 | /**/ | |
2649 | #endif | |
2650 | return 0; | |
2651 | } /* cy_open */ | |
1da177e4 LT |
2652 | |
2653 | /* | |
2654 | * cy_wait_until_sent() --- wait until the transmitter is empty | |
2655 | */ | |
02f1175c | 2656 | static void cy_wait_until_sent(struct tty_struct *tty, int timeout) |
1da177e4 | 2657 | { |
02f1175c JS |
2658 | struct cyclades_port *info = (struct cyclades_port *)tty->driver_data; |
2659 | void __iomem *base_addr; | |
2660 | int card, chip, channel, index; | |
2661 | unsigned long orig_jiffies; | |
2662 | int char_time; | |
2663 | ||
2664 | if (serial_paranoia_check(info, tty->name, "cy_wait_until_sent")) | |
2665 | return; | |
2666 | ||
2667 | if (info->xmit_fifo_size == 0) | |
2668 | return; /* Just in case.... */ | |
1da177e4 | 2669 | |
02f1175c JS |
2670 | orig_jiffies = jiffies; |
2671 | /* | |
2672 | * Set the check interval to be 1/5 of the estimated time to | |
2673 | * send a single character, and make it at least 1. The check | |
2674 | * interval should also be less than the timeout. | |
2675 | * | |
2676 | * Note: we have to use pretty tight timings here to satisfy | |
2677 | * the NIST-PCTS. | |
2678 | */ | |
2679 | char_time = (info->timeout - HZ / 50) / info->xmit_fifo_size; | |
2680 | char_time = char_time / 5; | |
2681 | if (char_time <= 0) | |
2682 | char_time = 1; | |
2683 | if (timeout < 0) | |
2684 | timeout = 0; | |
2685 | if (timeout) | |
2686 | char_time = min(char_time, timeout); | |
2687 | /* | |
2688 | * If the transmitter hasn't cleared in twice the approximate | |
2689 | * amount of time to send the entire FIFO, it probably won't | |
2690 | * ever clear. This assumes the UART isn't doing flow | |
2691 | * control, which is currently the case. Hence, if it ever | |
2692 | * takes longer than info->timeout, this is probably due to a | |
2693 | * UART bug of some kind. So, we clamp the timeout parameter at | |
2694 | * 2*info->timeout. | |
2695 | */ | |
2696 | if (!timeout || timeout > 2 * info->timeout) | |
2697 | timeout = 2 * info->timeout; | |
1da177e4 | 2698 | #ifdef CY_DEBUG_WAIT_UNTIL_SENT |
02f1175c JS |
2699 | printk("In cy_wait_until_sent(%d) check=%lu...", timeout, char_time); |
2700 | printk("jiff=%lu...", jiffies); | |
1da177e4 | 2701 | #endif |
02f1175c JS |
2702 | card = info->card; |
2703 | channel = (info->line) - (cy_card[card].first_line); | |
2704 | if (!IS_CYC_Z(cy_card[card])) { | |
2705 | chip = channel >> 2; | |
2706 | channel &= 0x03; | |
2707 | index = cy_card[card].bus_index; | |
2708 | base_addr = | |
2709 | cy_card[card].base_addr + (cy_chip_offset[chip] << index); | |
2710 | while (cy_readb(base_addr + (CySRER << index)) & CyTxRdy) { | |
1da177e4 | 2711 | #ifdef CY_DEBUG_WAIT_UNTIL_SENT |
02f1175c | 2712 | printk("Not clean (jiff=%lu)...", jiffies); |
1da177e4 | 2713 | #endif |
02f1175c JS |
2714 | if (msleep_interruptible(jiffies_to_msecs(char_time))) |
2715 | break; | |
2716 | if (timeout && time_after(jiffies, orig_jiffies + | |
2717 | timeout)) | |
2718 | break; | |
2719 | } | |
2720 | } else { | |
096dcfce | 2721 | /* Nothing to do! */ |
1da177e4 | 2722 | } |
02f1175c JS |
2723 | /* Run one more char cycle */ |
2724 | msleep_interruptible(jiffies_to_msecs(char_time * 5)); | |
1da177e4 | 2725 | #ifdef CY_DEBUG_WAIT_UNTIL_SENT |
02f1175c | 2726 | printk("Clean (jiff=%lu)...done\n", jiffies); |
1da177e4 LT |
2727 | #endif |
2728 | } | |
2729 | ||
2730 | /* | |
2731 | * This routine is called when a particular tty device is closed. | |
2732 | */ | |
02f1175c | 2733 | static void cy_close(struct tty_struct *tty, struct file *filp) |
1da177e4 | 2734 | { |
02f1175c JS |
2735 | struct cyclades_port *info = (struct cyclades_port *)tty->driver_data; |
2736 | unsigned long flags; | |
1da177e4 LT |
2737 | |
2738 | #ifdef CY_DEBUG_OTHER | |
02f1175c | 2739 | printk("cyc:cy_close ttyC%d\n", info->line); |
1da177e4 LT |
2740 | #endif |
2741 | ||
02f1175c JS |
2742 | if (!info || serial_paranoia_check(info, tty->name, "cy_close")) { |
2743 | return; | |
2744 | } | |
1da177e4 | 2745 | |
02f1175c JS |
2746 | CY_LOCK(info, flags); |
2747 | /* If the TTY is being hung up, nothing to do */ | |
2748 | if (tty_hung_up_p(filp)) { | |
2749 | CY_UNLOCK(info, flags); | |
2750 | return; | |
2751 | } | |
1da177e4 | 2752 | #ifdef CY_DEBUG_OPEN |
02f1175c | 2753 | printk("cyc:cy_close ttyC%d, count = %d\n", info->line, info->count); |
1da177e4 | 2754 | #endif |
02f1175c JS |
2755 | if ((tty->count == 1) && (info->count != 1)) { |
2756 | /* | |
2757 | * Uh, oh. tty->count is 1, which means that the tty | |
2758 | * structure will be freed. Info->count should always | |
2759 | * be one in these conditions. If it's greater than | |
2760 | * one, we've got real problems, since it means the | |
2761 | * serial port won't be shutdown. | |
2762 | */ | |
2763 | printk("cyc:cy_close: bad serial port count; tty->count is 1, " | |
2764 | "info->count is %d\n", info->count); | |
2765 | info->count = 1; | |
2766 | } | |
1da177e4 | 2767 | #ifdef CY_DEBUG_COUNT |
02f1175c JS |
2768 | printk("cyc:cy_close at (%d): decrementing count to %d\n", |
2769 | current->pid, info->count - 1); | |
1da177e4 | 2770 | #endif |
02f1175c | 2771 | if (--info->count < 0) { |
1da177e4 | 2772 | #ifdef CY_DEBUG_COUNT |
02f1175c | 2773 | printk("cyc:cyc_close setting count to 0\n"); |
1da177e4 | 2774 | #endif |
02f1175c | 2775 | info->count = 0; |
1da177e4 | 2776 | } |
02f1175c JS |
2777 | if (info->count) { |
2778 | CY_UNLOCK(info, flags); | |
2779 | return; | |
2780 | } | |
2781 | info->flags |= ASYNC_CLOSING; | |
1da177e4 | 2782 | |
02f1175c JS |
2783 | /* |
2784 | * Now we wait for the transmit buffer to clear; and we notify | |
2785 | * the line discipline to only process XON/XOFF characters. | |
2786 | */ | |
2787 | tty->closing = 1; | |
2788 | CY_UNLOCK(info, flags); | |
2789 | if (info->closing_wait != CY_CLOSING_WAIT_NONE) { | |
2790 | tty_wait_until_sent(tty, info->closing_wait); | |
1da177e4 | 2791 | } |
02f1175c JS |
2792 | CY_LOCK(info, flags); |
2793 | ||
2794 | if (!IS_CYC_Z(cy_card[info->card])) { | |
2795 | int channel = info->line - cy_card[info->card].first_line; | |
2796 | int index = cy_card[info->card].bus_index; | |
2797 | void __iomem *base_addr = cy_card[info->card].base_addr + | |
2798 | (cy_chip_offset[channel >> 2] << index); | |
2799 | /* Stop accepting input */ | |
2800 | channel &= 0x03; | |
2801 | cy_writeb(base_addr + (CyCAR << index), (u_char) channel); | |
2802 | cy_writeb(base_addr + (CySRER << index), | |
2803 | cy_readb(base_addr + (CySRER << index)) & ~CyRxData); | |
2804 | if (info->flags & ASYNC_INITIALIZED) { | |
2805 | /* Waiting for on-board buffers to be empty before closing | |
2806 | the port */ | |
2807 | CY_UNLOCK(info, flags); | |
2808 | cy_wait_until_sent(tty, info->timeout); | |
2809 | CY_LOCK(info, flags); | |
2810 | } | |
2811 | } else { | |
2812 | #ifdef Z_WAKE | |
2813 | /* Waiting for on-board buffers to be empty before closing the port */ | |
2814 | void __iomem *base_addr = cy_card[info->card].base_addr; | |
2815 | struct FIRM_ID __iomem *firm_id = base_addr + ID_ADDRESS; | |
2816 | struct ZFW_CTRL __iomem *zfw_ctrl = | |
2817 | base_addr + (cy_readl(&firm_id->zfwctrl_addr) & 0xfffff); | |
2818 | struct CH_CTRL __iomem *ch_ctrl = zfw_ctrl->ch_ctrl; | |
2819 | int channel = info->line - cy_card[info->card].first_line; | |
2820 | int retval; | |
2821 | ||
2822 | if (cy_readl(&ch_ctrl[channel].flow_status) != C_FS_TXIDLE) { | |
2823 | retval = cyz_issue_cmd(&cy_card[info->card], channel, | |
2824 | C_CM_IOCTLW, 0L); | |
2825 | if (retval != 0) { | |
2826 | printk("cyc:cy_close retval on ttyC%d was %x\n", | |
2827 | info->line, retval); | |
2828 | } | |
2829 | CY_UNLOCK(info, flags); | |
2830 | interruptible_sleep_on(&info->shutdown_wait); | |
2831 | CY_LOCK(info, flags); | |
2832 | } | |
1da177e4 | 2833 | #endif |
02f1175c JS |
2834 | } |
2835 | ||
1da177e4 | 2836 | CY_UNLOCK(info, flags); |
02f1175c JS |
2837 | shutdown(info); |
2838 | if (tty->driver->flush_buffer) | |
2839 | tty->driver->flush_buffer(tty); | |
2840 | tty_ldisc_flush(tty); | |
1da177e4 | 2841 | CY_LOCK(info, flags); |
02f1175c JS |
2842 | |
2843 | tty->closing = 0; | |
2844 | info->event = 0; | |
2845 | info->tty = NULL; | |
2846 | if (info->blocked_open) { | |
2847 | CY_UNLOCK(info, flags); | |
2848 | if (info->close_delay) { | |
2849 | msleep_interruptible(jiffies_to_msecs | |
2850 | (info->close_delay)); | |
2851 | } | |
2852 | wake_up_interruptible(&info->open_wait); | |
2853 | CY_LOCK(info, flags); | |
2854 | } | |
2855 | info->flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CLOSING); | |
2856 | wake_up_interruptible(&info->close_wait); | |
1da177e4 LT |
2857 | |
2858 | #ifdef CY_DEBUG_OTHER | |
02f1175c | 2859 | printk(" cyc:cy_close done\n"); |
1da177e4 LT |
2860 | #endif |
2861 | ||
02f1175c | 2862 | CY_UNLOCK(info, flags); |
02f1175c | 2863 | } /* cy_close */ |
1da177e4 LT |
2864 | |
2865 | /* This routine gets called when tty_write has put something into | |
2866 | * the write_queue. The characters may come from user space or | |
2867 | * kernel space. | |
2868 | * | |
2869 | * This routine will return the number of characters actually | |
2870 | * accepted for writing. | |
2871 | * | |
2872 | * If the port is not already transmitting stuff, start it off by | |
2873 | * enabling interrupts. The interrupt service routine will then | |
2874 | * ensure that the characters are sent. | |
2875 | * If the port is already active, there is no need to kick it. | |
2876 | * | |
2877 | */ | |
02f1175c | 2878 | static int cy_write(struct tty_struct *tty, const unsigned char *buf, int count) |
1da177e4 | 2879 | { |
02f1175c JS |
2880 | struct cyclades_port *info = (struct cyclades_port *)tty->driver_data; |
2881 | unsigned long flags; | |
2882 | int c, ret = 0; | |
1da177e4 LT |
2883 | |
2884 | #ifdef CY_DEBUG_IO | |
02f1175c | 2885 | printk("cyc:cy_write ttyC%d\n", info->line); /* */ |
1da177e4 LT |
2886 | #endif |
2887 | ||
02f1175c JS |
2888 | if (serial_paranoia_check(info, tty->name, "cy_write")) { |
2889 | return 0; | |
2890 | } | |
1da177e4 | 2891 | |
02f1175c JS |
2892 | if (!info->xmit_buf) |
2893 | return 0; | |
1da177e4 | 2894 | |
02f1175c JS |
2895 | CY_LOCK(info, flags); |
2896 | while (1) { | |
2897 | c = min(count, min((int)(SERIAL_XMIT_SIZE - info->xmit_cnt - 1), | |
2898 | (int)(SERIAL_XMIT_SIZE - info->xmit_head))); | |
2899 | ||
2900 | if (c <= 0) | |
2901 | break; | |
2902 | ||
2903 | memcpy(info->xmit_buf + info->xmit_head, buf, c); | |
2904 | info->xmit_head = (info->xmit_head + c) & | |
2905 | (SERIAL_XMIT_SIZE - 1); | |
2906 | info->xmit_cnt += c; | |
2907 | buf += c; | |
2908 | count -= c; | |
2909 | ret += c; | |
2910 | } | |
2911 | CY_UNLOCK(info, flags); | |
2912 | ||
2913 | info->idle_stats.xmit_bytes += ret; | |
2914 | info->idle_stats.xmit_idle = jiffies; | |
2915 | ||
2916 | if (info->xmit_cnt && !tty->stopped && !tty->hw_stopped) { | |
2917 | start_xmit(info); | |
2918 | } | |
2919 | return ret; | |
2920 | } /* cy_write */ | |
1da177e4 LT |
2921 | |
2922 | /* | |
2923 | * This routine is called by the kernel to write a single | |
2924 | * character to the tty device. If the kernel uses this routine, | |
2925 | * it must call the flush_chars() routine (if defined) when it is | |
2926 | * done stuffing characters into the driver. If there is no room | |
2927 | * in the queue, the character is ignored. | |
2928 | */ | |
02f1175c | 2929 | static void cy_put_char(struct tty_struct *tty, unsigned char ch) |
1da177e4 | 2930 | { |
02f1175c JS |
2931 | struct cyclades_port *info = (struct cyclades_port *)tty->driver_data; |
2932 | unsigned long flags; | |
1da177e4 LT |
2933 | |
2934 | #ifdef CY_DEBUG_IO | |
02f1175c | 2935 | printk("cyc:cy_put_char ttyC%d\n", info->line); |
1da177e4 LT |
2936 | #endif |
2937 | ||
02f1175c JS |
2938 | if (serial_paranoia_check(info, tty->name, "cy_put_char")) |
2939 | return; | |
1da177e4 | 2940 | |
02f1175c JS |
2941 | if (!info->xmit_buf) |
2942 | return; | |
1da177e4 | 2943 | |
02f1175c | 2944 | CY_LOCK(info, flags); |
90cc3018 | 2945 | if (info->xmit_cnt >= (int)(SERIAL_XMIT_SIZE - 1)) { |
02f1175c JS |
2946 | CY_UNLOCK(info, flags); |
2947 | return; | |
2948 | } | |
1da177e4 | 2949 | |
02f1175c JS |
2950 | info->xmit_buf[info->xmit_head++] = ch; |
2951 | info->xmit_head &= SERIAL_XMIT_SIZE - 1; | |
2952 | info->xmit_cnt++; | |
1da177e4 LT |
2953 | info->idle_stats.xmit_bytes++; |
2954 | info->idle_stats.xmit_idle = jiffies; | |
02f1175c JS |
2955 | CY_UNLOCK(info, flags); |
2956 | } /* cy_put_char */ | |
1da177e4 LT |
2957 | |
2958 | /* | |
2959 | * This routine is called by the kernel after it has written a | |
2960 | * series of characters to the tty device using put_char(). | |
2961 | */ | |
02f1175c | 2962 | static void cy_flush_chars(struct tty_struct *tty) |
1da177e4 | 2963 | { |
02f1175c JS |
2964 | struct cyclades_port *info = (struct cyclades_port *)tty->driver_data; |
2965 | ||
1da177e4 | 2966 | #ifdef CY_DEBUG_IO |
02f1175c | 2967 | printk("cyc:cy_flush_chars ttyC%d\n", info->line); /* */ |
1da177e4 LT |
2968 | #endif |
2969 | ||
02f1175c JS |
2970 | if (serial_paranoia_check(info, tty->name, "cy_flush_chars")) |
2971 | return; | |
1da177e4 | 2972 | |
02f1175c JS |
2973 | if (info->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped || |
2974 | !info->xmit_buf) | |
2975 | return; | |
1da177e4 | 2976 | |
02f1175c JS |
2977 | start_xmit(info); |
2978 | } /* cy_flush_chars */ | |
1da177e4 LT |
2979 | |
2980 | /* | |
2981 | * This routine returns the numbers of characters the tty driver | |
2982 | * will accept for queuing to be written. This number is subject | |
2983 | * to change as output buffers get emptied, or if the output flow | |
2984 | * control is activated. | |
2985 | */ | |
02f1175c | 2986 | static int cy_write_room(struct tty_struct *tty) |
1da177e4 | 2987 | { |
02f1175c JS |
2988 | struct cyclades_port *info = (struct cyclades_port *)tty->driver_data; |
2989 | int ret; | |
2990 | ||
1da177e4 | 2991 | #ifdef CY_DEBUG_IO |
02f1175c | 2992 | printk("cyc:cy_write_room ttyC%d\n", info->line); /* */ |
1da177e4 LT |
2993 | #endif |
2994 | ||
02f1175c JS |
2995 | if (serial_paranoia_check(info, tty->name, "cy_write_room")) |
2996 | return 0; | |
2997 | ret = SERIAL_XMIT_SIZE - info->xmit_cnt - 1; | |
2998 | if (ret < 0) | |
2999 | ret = 0; | |
3000 | return ret; | |
3001 | } /* cy_write_room */ | |
1da177e4 | 3002 | |
02f1175c | 3003 | static int cy_chars_in_buffer(struct tty_struct *tty) |
1da177e4 | 3004 | { |
02f1175c JS |
3005 | struct cyclades_port *info = (struct cyclades_port *)tty->driver_data; |
3006 | int card, channel; | |
1da177e4 | 3007 | |
02f1175c JS |
3008 | if (serial_paranoia_check(info, tty->name, "cy_chars_in_buffer")) |
3009 | return 0; | |
3010 | ||
3011 | card = info->card; | |
3012 | channel = (info->line) - (cy_card[card].first_line); | |
1da177e4 LT |
3013 | |
3014 | #ifdef Z_EXT_CHARS_IN_BUFFER | |
02f1175c JS |
3015 | if (!IS_CYC_Z(cy_card[card])) { |
3016 | #endif /* Z_EXT_CHARS_IN_BUFFER */ | |
1da177e4 | 3017 | #ifdef CY_DEBUG_IO |
02f1175c | 3018 | printk("cyc:cy_chars_in_buffer ttyC%d %d\n", info->line, info->xmit_cnt); /* */ |
1da177e4 | 3019 | #endif |
02f1175c | 3020 | return info->xmit_cnt; |
1da177e4 | 3021 | #ifdef Z_EXT_CHARS_IN_BUFFER |
02f1175c JS |
3022 | } else { |
3023 | static volatile struct FIRM_ID *firm_id; | |
3024 | static volatile struct ZFW_CTRL *zfw_ctrl; | |
3025 | static volatile struct CH_CTRL *ch_ctrl; | |
3026 | static volatile struct BUF_CTRL *buf_ctrl; | |
3027 | int char_count; | |
3028 | volatile uclong tx_put, tx_get, tx_bufsize; | |
3029 | ||
3030 | firm_id = cy_card[card].base_addr + ID_ADDRESS; | |
3031 | zfw_ctrl = cy_card[card].base_addr + | |
3032 | (cy_readl(&firm_id->zfwctrl_addr) & 0xfffff); | |
3033 | ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]); | |
3034 | buf_ctrl = &(zfw_ctrl->buf_ctrl[channel]); | |
3035 | ||
3036 | tx_get = cy_readl(&buf_ctrl->tx_get); | |
3037 | tx_put = cy_readl(&buf_ctrl->tx_put); | |
3038 | tx_bufsize = cy_readl(&buf_ctrl->tx_bufsize); | |
3039 | if (tx_put >= tx_get) | |
3040 | char_count = tx_put - tx_get; | |
3041 | else | |
3042 | char_count = tx_put - tx_get + tx_bufsize; | |
1da177e4 | 3043 | #ifdef CY_DEBUG_IO |
02f1175c | 3044 | printk("cyc:cy_chars_in_buffer ttyC%d %d\n", info->line, info->xmit_cnt + char_count); /* */ |
1da177e4 | 3045 | #endif |
096dcfce | 3046 | return info->xmit_cnt + char_count; |
02f1175c JS |
3047 | } |
3048 | #endif /* Z_EXT_CHARS_IN_BUFFER */ | |
3049 | } /* cy_chars_in_buffer */ | |
1da177e4 LT |
3050 | |
3051 | /* | |
3052 | * ------------------------------------------------------------ | |
3053 | * cy_ioctl() and friends | |
3054 | * ------------------------------------------------------------ | |
3055 | */ | |
3056 | ||
02f1175c | 3057 | static void cyy_baud_calc(struct cyclades_port *info, uclong baud) |
1da177e4 | 3058 | { |
02f1175c JS |
3059 | int co, co_val, bpr; |
3060 | uclong cy_clock = ((info->chip_rev >= CD1400_REV_J) ? 60000000 : | |
3061 | 25000000); | |
1da177e4 | 3062 | |
02f1175c JS |
3063 | if (baud == 0) { |
3064 | info->tbpr = info->tco = info->rbpr = info->rco = 0; | |
3065 | return; | |
3066 | } | |
1da177e4 | 3067 | |
02f1175c JS |
3068 | /* determine which prescaler to use */ |
3069 | for (co = 4, co_val = 2048; co; co--, co_val >>= 2) { | |
3070 | if (cy_clock / co_val / baud > 63) | |
3071 | break; | |
3072 | } | |
1da177e4 | 3073 | |
02f1175c JS |
3074 | bpr = (cy_clock / co_val * 2 / baud + 1) / 2; |
3075 | if (bpr > 255) | |
3076 | bpr = 255; | |
1da177e4 | 3077 | |
02f1175c JS |
3078 | info->tbpr = info->rbpr = bpr; |
3079 | info->tco = info->rco = co; | |
1da177e4 LT |
3080 | } |
3081 | ||
3082 | /* | |
3083 | * This routine finds or computes the various line characteristics. | |
3084 | * It used to be called config_setup | |
3085 | */ | |
02f1175c | 3086 | static void set_line_char(struct cyclades_port *info) |
1da177e4 | 3087 | { |
02f1175c JS |
3088 | unsigned long flags; |
3089 | void __iomem *base_addr; | |
3090 | int card, chip, channel, index; | |
3091 | unsigned cflag, iflag; | |
3092 | unsigned short chip_number; | |
3093 | int baud, baud_rate = 0; | |
3094 | int i; | |
3095 | ||
3096 | if (!info->tty || !info->tty->termios) { | |
3097 | return; | |
1da177e4 | 3098 | } |
02f1175c JS |
3099 | if (info->line == -1) { |
3100 | return; | |
1da177e4 | 3101 | } |
02f1175c JS |
3102 | cflag = info->tty->termios->c_cflag; |
3103 | iflag = info->tty->termios->c_iflag; | |
1da177e4 | 3104 | |
02f1175c JS |
3105 | /* |
3106 | * Set up the tty->alt_speed kludge | |
3107 | */ | |
3108 | if (info->tty) { | |
3109 | if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI) | |
3110 | info->tty->alt_speed = 57600; | |
3111 | if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI) | |
3112 | info->tty->alt_speed = 115200; | |
3113 | if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI) | |
3114 | info->tty->alt_speed = 230400; | |
3115 | if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP) | |
3116 | info->tty->alt_speed = 460800; | |
1da177e4 | 3117 | } |
02f1175c JS |
3118 | |
3119 | card = info->card; | |
3120 | channel = (info->line) - (cy_card[card].first_line); | |
3121 | chip_number = channel / 4; | |
3122 | ||
3123 | if (!IS_CYC_Z(cy_card[card])) { | |
3124 | ||
3125 | index = cy_card[card].bus_index; | |
3126 | ||
3127 | /* baud rate */ | |
3128 | baud = tty_get_baud_rate(info->tty); | |
3129 | if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) == | |
3130 | ASYNC_SPD_CUST) { | |
3131 | if (info->custom_divisor) | |
3132 | baud_rate = info->baud / info->custom_divisor; | |
3133 | else | |
3134 | baud_rate = info->baud; | |
3135 | } else if (baud > CD1400_MAX_SPEED) { | |
3136 | baud = CD1400_MAX_SPEED; | |
3137 | } | |
3138 | /* find the baud index */ | |
3139 | for (i = 0; i < 20; i++) { | |
3140 | if (baud == baud_table[i]) { | |
3141 | break; | |
3142 | } | |
3143 | } | |
3144 | if (i == 20) { | |
3145 | i = 19; /* CD1400_MAX_SPEED */ | |
3146 | } | |
3147 | ||
3148 | if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) == | |
3149 | ASYNC_SPD_CUST) { | |
3150 | cyy_baud_calc(info, baud_rate); | |
3151 | } else { | |
3152 | if (info->chip_rev >= CD1400_REV_J) { | |
3153 | /* It is a CD1400 rev. J or later */ | |
3154 | info->tbpr = baud_bpr_60[i]; /* Tx BPR */ | |
3155 | info->tco = baud_co_60[i]; /* Tx CO */ | |
3156 | info->rbpr = baud_bpr_60[i]; /* Rx BPR */ | |
3157 | info->rco = baud_co_60[i]; /* Rx CO */ | |
3158 | } else { | |
3159 | info->tbpr = baud_bpr_25[i]; /* Tx BPR */ | |
3160 | info->tco = baud_co_25[i]; /* Tx CO */ | |
3161 | info->rbpr = baud_bpr_25[i]; /* Rx BPR */ | |
3162 | info->rco = baud_co_25[i]; /* Rx CO */ | |
3163 | } | |
3164 | } | |
3165 | if (baud_table[i] == 134) { | |
3166 | /* get it right for 134.5 baud */ | |
3167 | info->timeout = (info->xmit_fifo_size * HZ * 30 / 269) + | |
3168 | 2; | |
3169 | } else if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) == | |
3170 | ASYNC_SPD_CUST) { | |
3171 | info->timeout = (info->xmit_fifo_size * HZ * 15 / | |
3172 | baud_rate) + 2; | |
3173 | } else if (baud_table[i]) { | |
3174 | info->timeout = (info->xmit_fifo_size * HZ * 15 / | |
3175 | baud_table[i]) + 2; | |
3176 | /* this needs to be propagated into the card info */ | |
3177 | } else { | |
3178 | info->timeout = 0; | |
3179 | } | |
3180 | /* By tradition (is it a standard?) a baud rate of zero | |
3181 | implies the line should be/has been closed. A bit | |
3182 | later in this routine such a test is performed. */ | |
3183 | ||
3184 | /* byte size and parity */ | |
3185 | info->cor5 = 0; | |
3186 | info->cor4 = 0; | |
3187 | /* receive threshold */ | |
3188 | info->cor3 = (info->default_threshold ? | |
3189 | info->default_threshold : baud_cor3[i]); | |
3190 | info->cor2 = CyETC; | |
3191 | switch (cflag & CSIZE) { | |
3192 | case CS5: | |
3193 | info->cor1 = Cy_5_BITS; | |
3194 | break; | |
3195 | case CS6: | |
3196 | info->cor1 = Cy_6_BITS; | |
3197 | break; | |
3198 | case CS7: | |
3199 | info->cor1 = Cy_7_BITS; | |
3200 | break; | |
3201 | case CS8: | |
3202 | info->cor1 = Cy_8_BITS; | |
3203 | break; | |
3204 | } | |
3205 | if (cflag & CSTOPB) { | |
3206 | info->cor1 |= Cy_2_STOP; | |
3207 | } | |
3208 | if (cflag & PARENB) { | |
3209 | if (cflag & PARODD) { | |
3210 | info->cor1 |= CyPARITY_O; | |
3211 | } else { | |
3212 | info->cor1 |= CyPARITY_E; | |
3213 | } | |
3214 | } else { | |
3215 | info->cor1 |= CyPARITY_NONE; | |
3216 | } | |
3217 | ||
3218 | /* CTS flow control flag */ | |
3219 | if (cflag & CRTSCTS) { | |
3220 | info->flags |= ASYNC_CTS_FLOW; | |
3221 | info->cor2 |= CyCtsAE; | |
3222 | } else { | |
3223 | info->flags &= ~ASYNC_CTS_FLOW; | |
3224 | info->cor2 &= ~CyCtsAE; | |
3225 | } | |
3226 | if (cflag & CLOCAL) | |
3227 | info->flags &= ~ASYNC_CHECK_CD; | |
3228 | else | |
3229 | info->flags |= ASYNC_CHECK_CD; | |
1da177e4 LT |
3230 | |
3231 | /*********************************************** | |
3232 | The hardware option, CyRtsAO, presents RTS when | |
3233 | the chip has characters to send. Since most modems | |
3234 | use RTS as reverse (inbound) flow control, this | |
3235 | option is not used. If inbound flow control is | |
3236 | necessary, DTR can be programmed to provide the | |
3237 | appropriate signals for use with a non-standard | |
3238 | cable. Contact Marcio Saito for details. | |
3239 | ***********************************************/ | |
3240 | ||
02f1175c JS |
3241 | chip = channel >> 2; |
3242 | channel &= 0x03; | |
3243 | base_addr = cy_card[card].base_addr + | |
3244 | (cy_chip_offset[chip] << index); | |
1da177e4 | 3245 | |
02f1175c JS |
3246 | CY_LOCK(info, flags); |
3247 | cy_writeb(base_addr + (CyCAR << index), (u_char) channel); | |
3248 | ||
3249 | /* tx and rx baud rate */ | |
3250 | ||
3251 | cy_writeb(base_addr + (CyTCOR << index), info->tco); | |
3252 | cy_writeb(base_addr + (CyTBPR << index), info->tbpr); | |
3253 | cy_writeb(base_addr + (CyRCOR << index), info->rco); | |
3254 | cy_writeb(base_addr + (CyRBPR << index), info->rbpr); | |
3255 | ||
3256 | /* set line characteristics according configuration */ | |
3257 | ||
3258 | cy_writeb(base_addr + (CySCHR1 << index), | |
3259 | START_CHAR(info->tty)); | |
3260 | cy_writeb(base_addr + (CySCHR2 << index), STOP_CHAR(info->tty)); | |
3261 | cy_writeb(base_addr + (CyCOR1 << index), info->cor1); | |
3262 | cy_writeb(base_addr + (CyCOR2 << index), info->cor2); | |
3263 | cy_writeb(base_addr + (CyCOR3 << index), info->cor3); | |
3264 | cy_writeb(base_addr + (CyCOR4 << index), info->cor4); | |
3265 | cy_writeb(base_addr + (CyCOR5 << index), info->cor5); | |
3266 | ||
3267 | cyy_issue_cmd(base_addr, CyCOR_CHANGE | CyCOR1ch | CyCOR2ch | | |
3268 | CyCOR3ch, index); | |
3269 | ||
3270 | cy_writeb(base_addr + (CyCAR << index), (u_char) channel); /* !!! Is this needed? */ | |
3271 | cy_writeb(base_addr + (CyRTPR << index), | |
3272 | (info->default_timeout ? info->default_timeout : 0x02)); | |
3273 | /* 10ms rx timeout */ | |
3274 | ||
3275 | if (C_CLOCAL(info->tty)) { | |
3276 | /* without modem intr */ | |
3277 | cy_writeb(base_addr + (CySRER << index), | |
3278 | cy_readb(base_addr + | |
3279 | (CySRER << index)) | CyMdmCh); | |
3280 | /* act on 1->0 modem transitions */ | |
3281 | if ((cflag & CRTSCTS) && info->rflow) { | |
3282 | cy_writeb(base_addr + (CyMCOR1 << index), | |
3283 | (CyCTS | rflow_thr[i])); | |
3284 | } else { | |
3285 | cy_writeb(base_addr + (CyMCOR1 << index), | |
3286 | CyCTS); | |
3287 | } | |
3288 | /* act on 0->1 modem transitions */ | |
3289 | cy_writeb(base_addr + (CyMCOR2 << index), CyCTS); | |
1da177e4 | 3290 | } else { |
02f1175c JS |
3291 | /* without modem intr */ |
3292 | cy_writeb(base_addr + (CySRER << index), | |
3293 | cy_readb(base_addr + | |
3294 | (CySRER << index)) | CyMdmCh); | |
3295 | /* act on 1->0 modem transitions */ | |
3296 | if ((cflag & CRTSCTS) && info->rflow) { | |
3297 | cy_writeb(base_addr + (CyMCOR1 << index), | |
3298 | (CyDSR | CyCTS | CyRI | CyDCD | | |
3299 | rflow_thr[i])); | |
3300 | } else { | |
3301 | cy_writeb(base_addr + (CyMCOR1 << index), | |
3302 | CyDSR | CyCTS | CyRI | CyDCD); | |
3303 | } | |
3304 | /* act on 0->1 modem transitions */ | |
3305 | cy_writeb(base_addr + (CyMCOR2 << index), | |
3306 | CyDSR | CyCTS | CyRI | CyDCD); | |
1da177e4 | 3307 | } |
02f1175c JS |
3308 | |
3309 | if (i == 0) { /* baud rate is zero, turn off line */ | |
3310 | if (info->rtsdtr_inv) { | |
3311 | cy_writeb(base_addr + (CyMSVR1 << index), | |
3312 | ~CyRTS); | |
3313 | } else { | |
3314 | cy_writeb(base_addr + (CyMSVR2 << index), | |
3315 | ~CyDTR); | |
3316 | } | |
1da177e4 | 3317 | #ifdef CY_DEBUG_DTR |
02f1175c JS |
3318 | printk("cyc:set_line_char dropping DTR\n"); |
3319 | printk(" status: 0x%x, 0x%x\n", | |
3320 | cy_readb(base_addr + (CyMSVR1 << index)), | |
3321 | cy_readb(base_addr + (CyMSVR2 << index))); | |
1da177e4 | 3322 | #endif |
02f1175c JS |
3323 | } else { |
3324 | if (info->rtsdtr_inv) { | |
3325 | cy_writeb(base_addr + (CyMSVR1 << index), | |
3326 | CyRTS); | |
3327 | } else { | |
3328 | cy_writeb(base_addr + (CyMSVR2 << index), | |
3329 | CyDTR); | |
3330 | } | |
1da177e4 | 3331 | #ifdef CY_DEBUG_DTR |
02f1175c JS |
3332 | printk("cyc:set_line_char raising DTR\n"); |
3333 | printk(" status: 0x%x, 0x%x\n", | |
3334 | cy_readb(base_addr + (CyMSVR1 << index)), | |
3335 | cy_readb(base_addr + (CyMSVR2 << index))); | |
1da177e4 | 3336 | #endif |
02f1175c | 3337 | } |
1da177e4 | 3338 | |
02f1175c JS |
3339 | if (info->tty) { |
3340 | clear_bit(TTY_IO_ERROR, &info->tty->flags); | |
3341 | } | |
3342 | CY_UNLOCK(info, flags); | |
1da177e4 | 3343 | |
1da177e4 | 3344 | } else { |
02f1175c JS |
3345 | struct FIRM_ID __iomem *firm_id; |
3346 | struct ZFW_CTRL __iomem *zfw_ctrl; | |
3347 | struct BOARD_CTRL __iomem *board_ctrl; | |
3348 | struct CH_CTRL __iomem *ch_ctrl; | |
3349 | struct BUF_CTRL __iomem *buf_ctrl; | |
3350 | uclong sw_flow; | |
3351 | int retval; | |
1da177e4 | 3352 | |
02f1175c JS |
3353 | firm_id = cy_card[card].base_addr + ID_ADDRESS; |
3354 | if (!ISZLOADED(cy_card[card])) { | |
3355 | return; | |
3356 | } | |
1da177e4 | 3357 | |
02f1175c JS |
3358 | zfw_ctrl = cy_card[card].base_addr + |
3359 | (cy_readl(&firm_id->zfwctrl_addr) & 0xfffff); | |
3360 | board_ctrl = &zfw_ctrl->board_ctrl; | |
3361 | ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]); | |
3362 | buf_ctrl = &zfw_ctrl->buf_ctrl[channel]; | |
3363 | ||
3364 | /* baud rate */ | |
3365 | baud = tty_get_baud_rate(info->tty); | |
3366 | if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) == | |
3367 | ASYNC_SPD_CUST) { | |
3368 | if (info->custom_divisor) | |
3369 | baud_rate = info->baud / info->custom_divisor; | |
3370 | else | |
3371 | baud_rate = info->baud; | |
3372 | } else if (baud > CYZ_MAX_SPEED) { | |
3373 | baud = CYZ_MAX_SPEED; | |
3374 | } | |
3375 | cy_writel(&ch_ctrl->comm_baud, baud); | |
3376 | ||
3377 | if (baud == 134) { | |
3378 | /* get it right for 134.5 baud */ | |
3379 | info->timeout = (info->xmit_fifo_size * HZ * 30 / 269) + | |
3380 | 2; | |
3381 | } else if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) == | |
3382 | ASYNC_SPD_CUST) { | |
3383 | info->timeout = (info->xmit_fifo_size * HZ * 15 / | |
3384 | baud_rate) + 2; | |
3385 | } else if (baud) { | |
3386 | info->timeout = (info->xmit_fifo_size * HZ * 15 / | |
3387 | baud) + 2; | |
3388 | /* this needs to be propagated into the card info */ | |
3389 | } else { | |
3390 | info->timeout = 0; | |
3391 | } | |
1da177e4 | 3392 | |
02f1175c JS |
3393 | /* byte size and parity */ |
3394 | switch (cflag & CSIZE) { | |
3395 | case CS5: | |
3396 | cy_writel(&ch_ctrl->comm_data_l, C_DL_CS5); | |
3397 | break; | |
3398 | case CS6: | |
3399 | cy_writel(&ch_ctrl->comm_data_l, C_DL_CS6); | |
3400 | break; | |
3401 | case CS7: | |
3402 | cy_writel(&ch_ctrl->comm_data_l, C_DL_CS7); | |
3403 | break; | |
3404 | case CS8: | |
3405 | cy_writel(&ch_ctrl->comm_data_l, C_DL_CS8); | |
3406 | break; | |
3407 | } | |
3408 | if (cflag & CSTOPB) { | |
3409 | cy_writel(&ch_ctrl->comm_data_l, | |
3410 | cy_readl(&ch_ctrl->comm_data_l) | C_DL_2STOP); | |
3411 | } else { | |
3412 | cy_writel(&ch_ctrl->comm_data_l, | |
3413 | cy_readl(&ch_ctrl->comm_data_l) | C_DL_1STOP); | |
3414 | } | |
3415 | if (cflag & PARENB) { | |
3416 | if (cflag & PARODD) { | |
3417 | cy_writel(&ch_ctrl->comm_parity, C_PR_ODD); | |
3418 | } else { | |
3419 | cy_writel(&ch_ctrl->comm_parity, C_PR_EVEN); | |
3420 | } | |
3421 | } else { | |
3422 | cy_writel(&ch_ctrl->comm_parity, C_PR_NONE); | |
3423 | } | |
1da177e4 | 3424 | |
02f1175c JS |
3425 | /* CTS flow control flag */ |
3426 | if (cflag & CRTSCTS) { | |
3427 | cy_writel(&ch_ctrl->hw_flow, | |
3428 | cy_readl(&ch_ctrl-> | |
3429 | hw_flow) | C_RS_CTS | C_RS_RTS); | |
3430 | } else { | |
3431 | cy_writel(&ch_ctrl->hw_flow, | |
3432 | cy_readl(&ch_ctrl-> | |
3433 | hw_flow) & ~(C_RS_CTS | C_RS_RTS)); | |
3434 | } | |
3435 | /* As the HW flow control is done in firmware, the driver | |
3436 | doesn't need to care about it */ | |
3437 | info->flags &= ~ASYNC_CTS_FLOW; | |
3438 | ||
3439 | /* XON/XOFF/XANY flow control flags */ | |
3440 | sw_flow = 0; | |
3441 | if (iflag & IXON) { | |
3442 | sw_flow |= C_FL_OXX; | |
3443 | if (iflag & IXANY) | |
3444 | sw_flow |= C_FL_OIXANY; | |
3445 | } | |
3446 | cy_writel(&ch_ctrl->sw_flow, sw_flow); | |
3447 | ||
3448 | retval = cyz_issue_cmd(&cy_card[card], channel, C_CM_IOCTL, 0L); | |
3449 | if (retval != 0) { | |
3450 | printk("cyc:set_line_char retval on ttyC%d was %x\n", | |
3451 | info->line, retval); | |
3452 | } | |
3453 | ||
3454 | /* CD sensitivity */ | |
3455 | if (cflag & CLOCAL) { | |
3456 | info->flags &= ~ASYNC_CHECK_CD; | |
3457 | } else { | |
3458 | info->flags |= ASYNC_CHECK_CD; | |
3459 | } | |
1da177e4 | 3460 | |
02f1175c JS |
3461 | if (baud == 0) { /* baud rate is zero, turn off line */ |
3462 | cy_writel(&ch_ctrl->rs_control, | |
3463 | cy_readl(&ch_ctrl->rs_control) & ~C_RS_DTR); | |
1da177e4 | 3464 | #ifdef CY_DEBUG_DTR |
02f1175c | 3465 | printk("cyc:set_line_char dropping Z DTR\n"); |
1da177e4 | 3466 | #endif |
02f1175c JS |
3467 | } else { |
3468 | cy_writel(&ch_ctrl->rs_control, | |
3469 | cy_readl(&ch_ctrl->rs_control) | C_RS_DTR); | |
1da177e4 | 3470 | #ifdef CY_DEBUG_DTR |
02f1175c | 3471 | printk("cyc:set_line_char raising Z DTR\n"); |
1da177e4 | 3472 | #endif |
02f1175c | 3473 | } |
1da177e4 | 3474 | |
02f1175c JS |
3475 | retval = cyz_issue_cmd(&cy_card[card], channel, C_CM_IOCTLM,0L); |
3476 | if (retval != 0) { | |
3477 | printk("cyc:set_line_char(2) retval on ttyC%d was %x\n", | |
3478 | info->line, retval); | |
3479 | } | |
1da177e4 | 3480 | |
02f1175c JS |
3481 | if (info->tty) { |
3482 | clear_bit(TTY_IO_ERROR, &info->tty->flags); | |
3483 | } | |
1da177e4 | 3484 | } |
02f1175c | 3485 | } /* set_line_char */ |
1da177e4 LT |
3486 | |
3487 | static int | |
02f1175c JS |
3488 | get_serial_info(struct cyclades_port *info, |
3489 | struct serial_struct __user * retinfo) | |
1da177e4 | 3490 | { |
02f1175c JS |
3491 | struct serial_struct tmp; |
3492 | struct cyclades_card *cinfo = &cy_card[info->card]; | |
1da177e4 | 3493 | |
02f1175c JS |
3494 | if (!retinfo) |
3495 | return -EFAULT; | |
3496 | memset(&tmp, 0, sizeof(tmp)); | |
3497 | tmp.type = info->type; | |
3498 | tmp.line = info->line; | |
3499 | tmp.port = info->card * 0x100 + info->line - cinfo->first_line; | |
3500 | tmp.irq = cinfo->irq; | |
3501 | tmp.flags = info->flags; | |
3502 | tmp.close_delay = info->close_delay; | |
3503 | tmp.baud_base = info->baud; | |
3504 | tmp.custom_divisor = info->custom_divisor; | |
3505 | tmp.hub6 = 0; /*!!! */ | |
3506 | return copy_to_user(retinfo, &tmp, sizeof(*retinfo)) ? -EFAULT : 0; | |
3507 | } /* get_serial_info */ | |
1da177e4 LT |
3508 | |
3509 | static int | |
02f1175c JS |
3510 | set_serial_info(struct cyclades_port *info, |
3511 | struct serial_struct __user * new_info) | |
1da177e4 | 3512 | { |
02f1175c JS |
3513 | struct serial_struct new_serial; |
3514 | struct cyclades_port old_info; | |
3515 | ||
3516 | if (copy_from_user(&new_serial, new_info, sizeof(new_serial))) | |
3517 | return -EFAULT; | |
3518 | old_info = *info; | |
3519 | ||
3520 | if (!capable(CAP_SYS_ADMIN)) { | |
3521 | if (new_serial.close_delay != info->close_delay || | |
3522 | new_serial.baud_base != info->baud || | |
3523 | (new_serial.flags & ASYNC_FLAGS & | |
3524 | ~ASYNC_USR_MASK) != | |
3525 | (info->flags & ASYNC_FLAGS & ~ASYNC_USR_MASK)) | |
3526 | return -EPERM; | |
3527 | info->flags = (info->flags & ~ASYNC_USR_MASK) | | |
3528 | (new_serial.flags & ASYNC_USR_MASK); | |
3529 | info->baud = new_serial.baud_base; | |
3530 | info->custom_divisor = new_serial.custom_divisor; | |
3531 | goto check_and_exit; | |
3532 | } | |
3533 | ||
3534 | /* | |
3535 | * OK, past this point, all the error checking has been done. | |
3536 | * At this point, we start making changes..... | |
3537 | */ | |
3538 | ||
3539 | info->baud = new_serial.baud_base; | |
3540 | info->custom_divisor = new_serial.custom_divisor; | |
3541 | info->flags = (info->flags & ~ASYNC_FLAGS) | | |
3542 | (new_serial.flags & ASYNC_FLAGS); | |
3543 | info->close_delay = new_serial.close_delay * HZ / 100; | |
3544 | info->closing_wait = new_serial.closing_wait * HZ / 100; | |
1da177e4 LT |
3545 | |
3546 | check_and_exit: | |
02f1175c JS |
3547 | if (info->flags & ASYNC_INITIALIZED) { |
3548 | set_line_char(info); | |
3549 | return 0; | |
3550 | } else { | |
3551 | return startup(info); | |
3552 | } | |
3553 | } /* set_serial_info */ | |
1da177e4 LT |
3554 | |
3555 | /* | |
3556 | * get_lsr_info - get line status register info | |
3557 | * | |
3558 | * Purpose: Let user call ioctl() to get info when the UART physically | |
3559 | * is emptied. On bus types like RS485, the transmitter must | |
3560 | * release the bus after transmitting. This must be done when | |
3561 | * the transmit shift register is empty, not be done when the | |
3562 | * transmit holding register is empty. This functionality | |
3563 | * allows an RS485 driver to be written in user space. | |
3564 | */ | |
02f1175c | 3565 | static int get_lsr_info(struct cyclades_port *info, unsigned int __user * value) |
1da177e4 | 3566 | { |
02f1175c JS |
3567 | int card, chip, channel, index; |
3568 | unsigned char status; | |
3569 | unsigned int result; | |
3570 | unsigned long flags; | |
3571 | void __iomem *base_addr; | |
1da177e4 | 3572 | |
02f1175c JS |
3573 | card = info->card; |
3574 | channel = (info->line) - (cy_card[card].first_line); | |
3575 | if (!IS_CYC_Z(cy_card[card])) { | |
3576 | chip = channel >> 2; | |
3577 | channel &= 0x03; | |
3578 | index = cy_card[card].bus_index; | |
3579 | base_addr = | |
3580 | cy_card[card].base_addr + (cy_chip_offset[chip] << index); | |
3581 | ||
3582 | CY_LOCK(info, flags); | |
3583 | status = cy_readb(base_addr + (CySRER << index)) & | |
3584 | (CyTxRdy | CyTxMpty); | |
3585 | CY_UNLOCK(info, flags); | |
3586 | result = (status ? 0 : TIOCSER_TEMT); | |
3587 | } else { | |
3588 | /* Not supported yet */ | |
3589 | return -EINVAL; | |
3590 | } | |
3591 | return put_user(result, (unsigned long __user *)value); | |
1da177e4 LT |
3592 | } |
3593 | ||
02f1175c | 3594 | static int cy_tiocmget(struct tty_struct *tty, struct file *file) |
1da177e4 | 3595 | { |
02f1175c JS |
3596 | struct cyclades_port *info = (struct cyclades_port *)tty->driver_data; |
3597 | int card, chip, channel, index; | |
3598 | void __iomem *base_addr; | |
3599 | unsigned long flags; | |
3600 | unsigned char status; | |
3601 | unsigned long lstatus; | |
3602 | unsigned int result; | |
3603 | struct FIRM_ID __iomem *firm_id; | |
3604 | struct ZFW_CTRL __iomem *zfw_ctrl; | |
3605 | struct BOARD_CTRL __iomem *board_ctrl; | |
3606 | struct CH_CTRL __iomem *ch_ctrl; | |
3607 | ||
3608 | if (serial_paranoia_check(info, tty->name, __FUNCTION__)) | |
3609 | return -ENODEV; | |
1da177e4 | 3610 | |
02f1175c JS |
3611 | card = info->card; |
3612 | channel = (info->line) - (cy_card[card].first_line); | |
3613 | if (!IS_CYC_Z(cy_card[card])) { | |
3614 | chip = channel >> 2; | |
3615 | channel &= 0x03; | |
3616 | index = cy_card[card].bus_index; | |
3617 | base_addr = | |
3618 | cy_card[card].base_addr + (cy_chip_offset[chip] << index); | |
1da177e4 | 3619 | |
02f1175c JS |
3620 | CY_LOCK(info, flags); |
3621 | cy_writeb(base_addr + (CyCAR << index), (u_char) channel); | |
3622 | status = cy_readb(base_addr + (CyMSVR1 << index)); | |
3623 | status |= cy_readb(base_addr + (CyMSVR2 << index)); | |
3624 | CY_UNLOCK(info, flags); | |
3625 | ||
3626 | if (info->rtsdtr_inv) { | |
3627 | result = ((status & CyRTS) ? TIOCM_DTR : 0) | | |
3628 | ((status & CyDTR) ? TIOCM_RTS : 0); | |
3629 | } else { | |
3630 | result = ((status & CyRTS) ? TIOCM_RTS : 0) | | |
3631 | ((status & CyDTR) ? TIOCM_DTR : 0); | |
3632 | } | |
3633 | result |= ((status & CyDCD) ? TIOCM_CAR : 0) | | |
3634 | ((status & CyRI) ? TIOCM_RNG : 0) | | |
3635 | ((status & CyDSR) ? TIOCM_DSR : 0) | | |
3636 | ((status & CyCTS) ? TIOCM_CTS : 0); | |
1da177e4 | 3637 | } else { |
02f1175c | 3638 | base_addr = cy_card[card].base_addr; |
1da177e4 | 3639 | |
02f1175c JS |
3640 | if (cy_card[card].num_chips != -1) { |
3641 | return -EINVAL; | |
3642 | } | |
1da177e4 | 3643 | |
02f1175c JS |
3644 | firm_id = cy_card[card].base_addr + ID_ADDRESS; |
3645 | if (ISZLOADED(cy_card[card])) { | |
3646 | zfw_ctrl = cy_card[card].base_addr + | |
3647 | (cy_readl(&firm_id->zfwctrl_addr) & 0xfffff); | |
3648 | board_ctrl = &zfw_ctrl->board_ctrl; | |
3649 | ch_ctrl = zfw_ctrl->ch_ctrl; | |
3650 | lstatus = cy_readl(&ch_ctrl[channel].rs_status); | |
3651 | result = ((lstatus & C_RS_RTS) ? TIOCM_RTS : 0) | | |
3652 | ((lstatus & C_RS_DTR) ? TIOCM_DTR : 0) | | |
3653 | ((lstatus & C_RS_DCD) ? TIOCM_CAR : 0) | | |
3654 | ((lstatus & C_RS_RI) ? TIOCM_RNG : 0) | | |
3655 | ((lstatus & C_RS_DSR) ? TIOCM_DSR : 0) | | |
3656 | ((lstatus & C_RS_CTS) ? TIOCM_CTS : 0); | |
3657 | } else { | |
3658 | result = 0; | |
3659 | return -ENODEV; | |
3660 | } | |
1da177e4 | 3661 | |
02f1175c JS |
3662 | } |
3663 | return result; | |
3664 | } /* cy_tiomget */ | |
1da177e4 LT |
3665 | |
3666 | static int | |
3667 | cy_tiocmset(struct tty_struct *tty, struct file *file, | |
02f1175c | 3668 | unsigned int set, unsigned int clear) |
1da177e4 | 3669 | { |
02f1175c JS |
3670 | struct cyclades_port *info = (struct cyclades_port *)tty->driver_data; |
3671 | int card, chip, channel, index; | |
3672 | void __iomem *base_addr; | |
3673 | unsigned long flags; | |
3674 | struct FIRM_ID __iomem *firm_id; | |
3675 | struct ZFW_CTRL __iomem *zfw_ctrl; | |
3676 | struct BOARD_CTRL __iomem *board_ctrl; | |
3677 | struct CH_CTRL __iomem *ch_ctrl; | |
3678 | int retval; | |
3679 | ||
3680 | if (serial_paranoia_check(info, tty->name, __FUNCTION__)) | |
3681 | return -ENODEV; | |
3682 | ||
3683 | card = info->card; | |
3684 | channel = (info->line) - (cy_card[card].first_line); | |
3685 | if (!IS_CYC_Z(cy_card[card])) { | |
3686 | chip = channel >> 2; | |
3687 | channel &= 0x03; | |
3688 | index = cy_card[card].bus_index; | |
3689 | base_addr = | |
3690 | cy_card[card].base_addr + (cy_chip_offset[chip] << index); | |
3691 | ||
3692 | if (set & TIOCM_RTS) { | |
3693 | CY_LOCK(info, flags); | |
3694 | cy_writeb(base_addr + (CyCAR << index), | |
3695 | (u_char) channel); | |
3696 | if (info->rtsdtr_inv) { | |
3697 | cy_writeb(base_addr + (CyMSVR2 << index), | |
3698 | CyDTR); | |
3699 | } else { | |
3700 | cy_writeb(base_addr + (CyMSVR1 << index), | |
3701 | CyRTS); | |
3702 | } | |
3703 | CY_UNLOCK(info, flags); | |
3704 | } | |
3705 | if (clear & TIOCM_RTS) { | |
3706 | CY_LOCK(info, flags); | |
3707 | cy_writeb(base_addr + (CyCAR << index), | |
3708 | (u_char) channel); | |
3709 | if (info->rtsdtr_inv) { | |
3710 | cy_writeb(base_addr + (CyMSVR2 << index), | |
3711 | ~CyDTR); | |
3712 | } else { | |
3713 | cy_writeb(base_addr + (CyMSVR1 << index), | |
3714 | ~CyRTS); | |
3715 | } | |
3716 | CY_UNLOCK(info, flags); | |
3717 | } | |
3718 | if (set & TIOCM_DTR) { | |
3719 | CY_LOCK(info, flags); | |
3720 | cy_writeb(base_addr + (CyCAR << index), | |
3721 | (u_char) channel); | |
3722 | if (info->rtsdtr_inv) { | |
3723 | cy_writeb(base_addr + (CyMSVR1 << index), | |
3724 | CyRTS); | |
3725 | } else { | |
3726 | cy_writeb(base_addr + (CyMSVR2 << index), | |
3727 | CyDTR); | |
3728 | } | |
1da177e4 | 3729 | #ifdef CY_DEBUG_DTR |
02f1175c JS |
3730 | printk("cyc:set_modem_info raising DTR\n"); |
3731 | printk(" status: 0x%x, 0x%x\n", | |
3732 | cy_readb(base_addr + (CyMSVR1 << index)), | |
3733 | cy_readb(base_addr + (CyMSVR2 << index))); | |
1da177e4 | 3734 | #endif |
02f1175c JS |
3735 | CY_UNLOCK(info, flags); |
3736 | } | |
3737 | if (clear & TIOCM_DTR) { | |
3738 | CY_LOCK(info, flags); | |
3739 | cy_writeb(base_addr + (CyCAR << index), | |
3740 | (u_char) channel); | |
3741 | if (info->rtsdtr_inv) { | |
3742 | cy_writeb(base_addr + (CyMSVR1 << index), | |
3743 | ~CyRTS); | |
3744 | } else { | |
3745 | cy_writeb(base_addr + (CyMSVR2 << index), | |
3746 | ~CyDTR); | |
3747 | } | |
1da177e4 LT |
3748 | |
3749 | #ifdef CY_DEBUG_DTR | |
02f1175c JS |
3750 | printk("cyc:set_modem_info dropping DTR\n"); |
3751 | printk(" status: 0x%x, 0x%x\n", | |
3752 | cy_readb(base_addr + (CyMSVR1 << index)), | |
3753 | cy_readb(base_addr + (CyMSVR2 << index))); | |
1da177e4 | 3754 | #endif |
02f1175c JS |
3755 | CY_UNLOCK(info, flags); |
3756 | } | |
3757 | } else { | |
3758 | base_addr = cy_card[card].base_addr; | |
3759 | ||
3760 | firm_id = cy_card[card].base_addr + ID_ADDRESS; | |
3761 | if (ISZLOADED(cy_card[card])) { | |
3762 | zfw_ctrl = cy_card[card].base_addr + | |
3763 | (cy_readl(&firm_id->zfwctrl_addr) & 0xfffff); | |
3764 | board_ctrl = &zfw_ctrl->board_ctrl; | |
3765 | ch_ctrl = zfw_ctrl->ch_ctrl; | |
3766 | ||
3767 | if (set & TIOCM_RTS) { | |
3768 | CY_LOCK(info, flags); | |
3769 | cy_writel(&ch_ctrl[channel].rs_control, | |
3770 | cy_readl(&ch_ctrl[channel]. | |
3771 | rs_control) | C_RS_RTS); | |
3772 | CY_UNLOCK(info, flags); | |
3773 | } | |
3774 | if (clear & TIOCM_RTS) { | |
3775 | CY_LOCK(info, flags); | |
3776 | cy_writel(&ch_ctrl[channel].rs_control, | |
3777 | cy_readl(&ch_ctrl[channel]. | |
3778 | rs_control) & ~C_RS_RTS); | |
3779 | CY_UNLOCK(info, flags); | |
3780 | } | |
3781 | if (set & TIOCM_DTR) { | |
3782 | CY_LOCK(info, flags); | |
3783 | cy_writel(&ch_ctrl[channel].rs_control, | |
3784 | cy_readl(&ch_ctrl[channel]. | |
3785 | rs_control) | C_RS_DTR); | |
1da177e4 | 3786 | #ifdef CY_DEBUG_DTR |
02f1175c | 3787 | printk("cyc:set_modem_info raising Z DTR\n"); |
1da177e4 | 3788 | #endif |
02f1175c JS |
3789 | CY_UNLOCK(info, flags); |
3790 | } | |
3791 | if (clear & TIOCM_DTR) { | |
3792 | CY_LOCK(info, flags); | |
3793 | cy_writel(&ch_ctrl[channel].rs_control, | |
3794 | cy_readl(&ch_ctrl[channel]. | |
3795 | rs_control) & ~C_RS_DTR); | |
1da177e4 | 3796 | #ifdef CY_DEBUG_DTR |
02f1175c | 3797 | printk("cyc:set_modem_info clearing Z DTR\n"); |
1da177e4 | 3798 | #endif |
02f1175c JS |
3799 | CY_UNLOCK(info, flags); |
3800 | } | |
3801 | } else { | |
3802 | return -ENODEV; | |
3803 | } | |
3804 | CY_LOCK(info, flags); | |
3805 | retval = cyz_issue_cmd(&cy_card[info->card], | |
3806 | channel, C_CM_IOCTLM, 0L); | |
3807 | if (retval != 0) { | |
3808 | printk("cyc:set_modem_info retval on ttyC%d was %x\n", | |
3809 | info->line, retval); | |
3810 | } | |
3811 | CY_UNLOCK(info, flags); | |
1da177e4 | 3812 | } |
02f1175c JS |
3813 | return 0; |
3814 | } /* cy_tiocmset */ | |
1da177e4 LT |
3815 | |
3816 | /* | |
3817 | * cy_break() --- routine which turns the break handling on or off | |
3818 | */ | |
02f1175c | 3819 | static void cy_break(struct tty_struct *tty, int break_state) |
1da177e4 | 3820 | { |
02f1175c JS |
3821 | struct cyclades_port *info = (struct cyclades_port *)tty->driver_data; |
3822 | unsigned long flags; | |
1da177e4 | 3823 | |
02f1175c JS |
3824 | if (serial_paranoia_check(info, tty->name, "cy_break")) |
3825 | return; | |
1da177e4 | 3826 | |
02f1175c JS |
3827 | CY_LOCK(info, flags); |
3828 | if (!IS_CYC_Z(cy_card[info->card])) { | |
3829 | /* Let the transmit ISR take care of this (since it | |
3830 | requires stuffing characters into the output stream). | |
3831 | */ | |
3832 | if (break_state == -1) { | |
3833 | if (!info->breakon) { | |
3834 | info->breakon = 1; | |
3835 | if (!info->xmit_cnt) { | |
3836 | CY_UNLOCK(info, flags); | |
3837 | start_xmit(info); | |
3838 | CY_LOCK(info, flags); | |
3839 | } | |
3840 | } | |
3841 | } else { | |
3842 | if (!info->breakoff) { | |
3843 | info->breakoff = 1; | |
3844 | if (!info->xmit_cnt) { | |
3845 | CY_UNLOCK(info, flags); | |
3846 | start_xmit(info); | |
3847 | CY_LOCK(info, flags); | |
3848 | } | |
3849 | } | |
1da177e4 | 3850 | } |
1da177e4 | 3851 | } else { |
02f1175c JS |
3852 | int retval; |
3853 | ||
3854 | if (break_state == -1) { | |
3855 | retval = cyz_issue_cmd(&cy_card[info->card], | |
3856 | info->line - cy_card[info->card].first_line, | |
3857 | C_CM_SET_BREAK, 0L); | |
3858 | if (retval != 0) { | |
3859 | printk("cyc:cy_break (set) retval on ttyC%d " | |
3860 | "was %x\n", info->line, retval); | |
3861 | } | |
3862 | } else { | |
3863 | retval = cyz_issue_cmd(&cy_card[info->card], | |
3864 | info->line - cy_card[info->card].first_line, | |
3865 | C_CM_CLR_BREAK, 0L); | |
3866 | if (retval != 0) { | |
3867 | printk("cyc:cy_break (clr) retval on ttyC%d " | |
3868 | "was %x\n", info->line, retval); | |
3869 | } | |
1da177e4 | 3870 | } |
1da177e4 | 3871 | } |
02f1175c JS |
3872 | CY_UNLOCK(info, flags); |
3873 | } /* cy_break */ | |
1da177e4 LT |
3874 | |
3875 | static int | |
02f1175c | 3876 | get_mon_info(struct cyclades_port *info, struct cyclades_monitor __user * mon) |
1da177e4 LT |
3877 | { |
3878 | ||
02f1175c JS |
3879 | if (copy_to_user(mon, &info->mon, sizeof(struct cyclades_monitor))) |
3880 | return -EFAULT; | |
3881 | info->mon.int_count = 0; | |
3882 | info->mon.char_count = 0; | |
3883 | info->mon.char_max = 0; | |
3884 | info->mon.char_last = 0; | |
3885 | return 0; | |
3886 | } /* get_mon_info */ | |
1da177e4 | 3887 | |
02f1175c | 3888 | static int set_threshold(struct cyclades_port *info, unsigned long value) |
1da177e4 | 3889 | { |
02f1175c JS |
3890 | void __iomem *base_addr; |
3891 | int card, channel, chip, index; | |
3892 | unsigned long flags; | |
1da177e4 | 3893 | |
02f1175c JS |
3894 | card = info->card; |
3895 | channel = info->line - cy_card[card].first_line; | |
3896 | if (!IS_CYC_Z(cy_card[card])) { | |
3897 | chip = channel >> 2; | |
3898 | channel &= 0x03; | |
3899 | index = cy_card[card].bus_index; | |
3900 | base_addr = | |
3901 | cy_card[card].base_addr + (cy_chip_offset[chip] << index); | |
3902 | ||
3903 | info->cor3 &= ~CyREC_FIFO; | |
3904 | info->cor3 |= value & CyREC_FIFO; | |
1da177e4 | 3905 | |
02f1175c JS |
3906 | CY_LOCK(info, flags); |
3907 | cy_writeb(base_addr + (CyCOR3 << index), info->cor3); | |
3908 | cyy_issue_cmd(base_addr, CyCOR_CHANGE | CyCOR3ch, index); | |
3909 | CY_UNLOCK(info, flags); | |
3910 | } else { | |
096dcfce | 3911 | /* Nothing to do! */ |
02f1175c JS |
3912 | } |
3913 | return 0; | |
3914 | } /* set_threshold */ | |
1da177e4 LT |
3915 | |
3916 | static int | |
02f1175c | 3917 | get_threshold(struct cyclades_port *info, unsigned long __user * value) |
1da177e4 | 3918 | { |
02f1175c JS |
3919 | void __iomem *base_addr; |
3920 | int card, channel, chip, index; | |
3921 | unsigned long tmp; | |
1da177e4 | 3922 | |
02f1175c JS |
3923 | card = info->card; |
3924 | channel = info->line - cy_card[card].first_line; | |
3925 | if (!IS_CYC_Z(cy_card[card])) { | |
3926 | chip = channel >> 2; | |
3927 | channel &= 0x03; | |
3928 | index = cy_card[card].bus_index; | |
3929 | base_addr = | |
3930 | cy_card[card].base_addr + (cy_chip_offset[chip] << index); | |
3931 | ||
3932 | tmp = cy_readb(base_addr + (CyCOR3 << index)) & CyREC_FIFO; | |
3933 | return put_user(tmp, value); | |
3934 | } else { | |
096dcfce | 3935 | /* Nothing to do! */ |
02f1175c JS |
3936 | return 0; |
3937 | } | |
3938 | } /* get_threshold */ | |
1da177e4 LT |
3939 | |
3940 | static int | |
02f1175c | 3941 | set_default_threshold(struct cyclades_port *info, unsigned long value) |
1da177e4 | 3942 | { |
02f1175c JS |
3943 | info->default_threshold = value & 0x0f; |
3944 | return 0; | |
3945 | } /* set_default_threshold */ | |
1da177e4 LT |
3946 | |
3947 | static int | |
02f1175c | 3948 | get_default_threshold(struct cyclades_port *info, unsigned long __user * value) |
1da177e4 | 3949 | { |
02f1175c JS |
3950 | return put_user(info->default_threshold, value); |
3951 | } /* get_default_threshold */ | |
1da177e4 | 3952 | |
02f1175c | 3953 | static int set_timeout(struct cyclades_port *info, unsigned long value) |
1da177e4 | 3954 | { |
02f1175c JS |
3955 | void __iomem *base_addr; |
3956 | int card, channel, chip, index; | |
3957 | unsigned long flags; | |
1da177e4 | 3958 | |
02f1175c JS |
3959 | card = info->card; |
3960 | channel = info->line - cy_card[card].first_line; | |
3961 | if (!IS_CYC_Z(cy_card[card])) { | |
3962 | chip = channel >> 2; | |
3963 | channel &= 0x03; | |
3964 | index = cy_card[card].bus_index; | |
3965 | base_addr = | |
3966 | cy_card[card].base_addr + (cy_chip_offset[chip] << index); | |
1da177e4 | 3967 | |
02f1175c JS |
3968 | CY_LOCK(info, flags); |
3969 | cy_writeb(base_addr + (CyRTPR << index), value & 0xff); | |
3970 | CY_UNLOCK(info, flags); | |
3971 | } else { | |
096dcfce | 3972 | /* Nothing to do! */ |
02f1175c JS |
3973 | } |
3974 | return 0; | |
3975 | } /* set_timeout */ | |
1da177e4 | 3976 | |
02f1175c | 3977 | static int get_timeout(struct cyclades_port *info, unsigned long __user * value) |
1da177e4 | 3978 | { |
02f1175c JS |
3979 | void __iomem *base_addr; |
3980 | int card, channel, chip, index; | |
3981 | unsigned long tmp; | |
1da177e4 | 3982 | |
02f1175c JS |
3983 | card = info->card; |
3984 | channel = info->line - cy_card[card].first_line; | |
3985 | if (!IS_CYC_Z(cy_card[card])) { | |
3986 | chip = channel >> 2; | |
3987 | channel &= 0x03; | |
3988 | index = cy_card[card].bus_index; | |
3989 | base_addr = | |
3990 | cy_card[card].base_addr + (cy_chip_offset[chip] << index); | |
3991 | ||
3992 | tmp = cy_readb(base_addr + (CyRTPR << index)); | |
3993 | return put_user(tmp, value); | |
3994 | } else { | |
096dcfce | 3995 | /* Nothing to do! */ |
02f1175c JS |
3996 | return 0; |
3997 | } | |
3998 | } /* get_timeout */ | |
1da177e4 | 3999 | |
02f1175c | 4000 | static int set_default_timeout(struct cyclades_port *info, unsigned long value) |
1da177e4 | 4001 | { |
02f1175c JS |
4002 | info->default_timeout = value & 0xff; |
4003 | return 0; | |
4004 | } /* set_default_timeout */ | |
1da177e4 LT |
4005 | |
4006 | static int | |
02f1175c | 4007 | get_default_timeout(struct cyclades_port *info, unsigned long __user * value) |
1da177e4 | 4008 | { |
02f1175c JS |
4009 | return put_user(info->default_timeout, value); |
4010 | } /* get_default_timeout */ | |
1da177e4 LT |
4011 | |
4012 | /* | |
4013 | * This routine allows the tty driver to implement device- | |
4014 | * specific ioctl's. If the ioctl number passed in cmd is | |
4015 | * not recognized by the driver, it should return ENOIOCTLCMD. | |
4016 | */ | |
4017 | static int | |
02f1175c JS |
4018 | cy_ioctl(struct tty_struct *tty, struct file *file, |
4019 | unsigned int cmd, unsigned long arg) | |
1da177e4 | 4020 | { |
02f1175c JS |
4021 | struct cyclades_port *info = (struct cyclades_port *)tty->driver_data; |
4022 | struct cyclades_icount cprev, cnow; /* kernel counter temps */ | |
4023 | struct serial_icounter_struct __user *p_cuser; /* user space */ | |
4024 | int ret_val = 0; | |
4025 | unsigned long flags; | |
4026 | void __user *argp = (void __user *)arg; | |
4027 | ||
4028 | if (serial_paranoia_check(info, tty->name, "cy_ioctl")) | |
4029 | return -ENODEV; | |
1da177e4 LT |
4030 | |
4031 | #ifdef CY_DEBUG_OTHER | |
02f1175c | 4032 | printk("cyc:cy_ioctl ttyC%d, cmd = %x arg = %lx\n", info->line, cmd, arg); /* */ |
1da177e4 LT |
4033 | #endif |
4034 | ||
02f1175c JS |
4035 | switch (cmd) { |
4036 | case CYGETMON: | |
4037 | ret_val = get_mon_info(info, argp); | |
4038 | break; | |
4039 | case CYGETTHRESH: | |
4040 | ret_val = get_threshold(info, argp); | |
4041 | break; | |
4042 | case CYSETTHRESH: | |
4043 | ret_val = set_threshold(info, arg); | |
4044 | break; | |
4045 | case CYGETDEFTHRESH: | |
4046 | ret_val = get_default_threshold(info, argp); | |
4047 | break; | |
4048 | case CYSETDEFTHRESH: | |
4049 | ret_val = set_default_threshold(info, arg); | |
4050 | break; | |
4051 | case CYGETTIMEOUT: | |
4052 | ret_val = get_timeout(info, argp); | |
4053 | break; | |
4054 | case CYSETTIMEOUT: | |
4055 | ret_val = set_timeout(info, arg); | |
4056 | break; | |
4057 | case CYGETDEFTIMEOUT: | |
4058 | ret_val = get_default_timeout(info, argp); | |
4059 | break; | |
4060 | case CYSETDEFTIMEOUT: | |
4061 | ret_val = set_default_timeout(info, arg); | |
4062 | break; | |
1da177e4 | 4063 | case CYSETRFLOW: |
02f1175c JS |
4064 | info->rflow = (int)arg; |
4065 | ret_val = 0; | |
4066 | break; | |
1da177e4 | 4067 | case CYGETRFLOW: |
02f1175c JS |
4068 | ret_val = info->rflow; |
4069 | break; | |
1da177e4 | 4070 | case CYSETRTSDTR_INV: |
02f1175c JS |
4071 | info->rtsdtr_inv = (int)arg; |
4072 | ret_val = 0; | |
4073 | break; | |
1da177e4 | 4074 | case CYGETRTSDTR_INV: |
02f1175c JS |
4075 | ret_val = info->rtsdtr_inv; |
4076 | break; | |
1da177e4 | 4077 | case CYGETCARDINFO: |
02f1175c JS |
4078 | if (copy_to_user(argp, &cy_card[info->card], |
4079 | sizeof(struct cyclades_card))) { | |
4080 | ret_val = -EFAULT; | |
4081 | break; | |
4082 | } | |
4083 | ret_val = 0; | |
1da177e4 | 4084 | break; |
1da177e4 | 4085 | case CYGETCD1400VER: |
02f1175c JS |
4086 | ret_val = info->chip_rev; |
4087 | break; | |
1da177e4 LT |
4088 | #ifndef CONFIG_CYZ_INTR |
4089 | case CYZSETPOLLCYCLE: | |
02f1175c JS |
4090 | cyz_polling_cycle = (arg * HZ) / 1000; |
4091 | ret_val = 0; | |
4092 | break; | |
1da177e4 | 4093 | case CYZGETPOLLCYCLE: |
02f1175c JS |
4094 | ret_val = (cyz_polling_cycle * 1000) / HZ; |
4095 | break; | |
4096 | #endif /* CONFIG_CYZ_INTR */ | |
1da177e4 | 4097 | case CYSETWAIT: |
02f1175c JS |
4098 | info->closing_wait = (unsigned short)arg *HZ / 100; |
4099 | ret_val = 0; | |
4100 | break; | |
1da177e4 | 4101 | case CYGETWAIT: |
02f1175c JS |
4102 | ret_val = info->closing_wait / (HZ / 100); |
4103 | break; | |
4104 | case TIOCGSERIAL: | |
4105 | ret_val = get_serial_info(info, argp); | |
4106 | break; | |
4107 | case TIOCSSERIAL: | |
4108 | ret_val = set_serial_info(info, argp); | |
4109 | break; | |
4110 | case TIOCSERGETLSR: /* Get line status register */ | |
4111 | ret_val = get_lsr_info(info, argp); | |
4112 | break; | |
4113 | /* | |
4114 | * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change | |
4115 | * - mask passed in arg for lines of interest | |
4116 | * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking) | |
4117 | * Caller should use TIOCGICOUNT to see which one it was | |
4118 | */ | |
1da177e4 | 4119 | case TIOCMIWAIT: |
1da177e4 | 4120 | CY_LOCK(info, flags); |
02f1175c JS |
4121 | /* note the counters on entry */ |
4122 | cprev = info->icount; | |
1da177e4 | 4123 | CY_UNLOCK(info, flags); |
02f1175c JS |
4124 | while (1) { |
4125 | interruptible_sleep_on(&info->delta_msr_wait); | |
4126 | /* see if a signal did it */ | |
4127 | if (signal_pending(current)) { | |
4128 | return -ERESTARTSYS; | |
4129 | } | |
1da177e4 | 4130 | |
02f1175c JS |
4131 | CY_LOCK(info, flags); |
4132 | cnow = info->icount; /* atomic copy */ | |
4133 | CY_UNLOCK(info, flags); | |
4134 | ||
4135 | if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr && | |
4136 | cnow.dcd == cprev.dcd && cnow.cts == cprev.cts) { | |
4137 | return -EIO; /* no change => error */ | |
4138 | } | |
4139 | if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) || | |
4140 | ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) || | |
4141 | ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) || | |
4142 | ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts))) { | |
4143 | return 0; | |
4144 | } | |
4145 | cprev = cnow; | |
1da177e4 | 4146 | } |
02f1175c | 4147 | /* NOTREACHED */ |
1da177e4 | 4148 | |
02f1175c JS |
4149 | /* |
4150 | * Get counter of input serial line interrupts (DCD,RI,DSR,CTS) | |
4151 | * Return: write counters to the user passed counter struct | |
4152 | * NB: both 1->0 and 0->1 transitions are counted except for | |
4153 | * RI where only 0->1 is counted. | |
4154 | */ | |
1da177e4 | 4155 | case TIOCGICOUNT: |
02f1175c JS |
4156 | CY_LOCK(info, flags); |
4157 | cnow = info->icount; | |
4158 | CY_UNLOCK(info, flags); | |
4159 | p_cuser = argp; | |
4160 | ret_val = put_user(cnow.cts, &p_cuser->cts); | |
4161 | if (ret_val) | |
4162 | return ret_val; | |
4163 | ret_val = put_user(cnow.dsr, &p_cuser->dsr); | |
4164 | if (ret_val) | |
4165 | return ret_val; | |
4166 | ret_val = put_user(cnow.rng, &p_cuser->rng); | |
4167 | if (ret_val) | |
4168 | return ret_val; | |
4169 | ret_val = put_user(cnow.dcd, &p_cuser->dcd); | |
4170 | if (ret_val) | |
4171 | return ret_val; | |
4172 | ret_val = put_user(cnow.rx, &p_cuser->rx); | |
4173 | if (ret_val) | |
4174 | return ret_val; | |
4175 | ret_val = put_user(cnow.tx, &p_cuser->tx); | |
4176 | if (ret_val) | |
4177 | return ret_val; | |
4178 | ret_val = put_user(cnow.frame, &p_cuser->frame); | |
4179 | if (ret_val) | |
4180 | return ret_val; | |
4181 | ret_val = put_user(cnow.overrun, &p_cuser->overrun); | |
4182 | if (ret_val) | |
4183 | return ret_val; | |
4184 | ret_val = put_user(cnow.parity, &p_cuser->parity); | |
4185 | if (ret_val) | |
4186 | return ret_val; | |
4187 | ret_val = put_user(cnow.brk, &p_cuser->brk); | |
4188 | if (ret_val) | |
4189 | return ret_val; | |
4190 | ret_val = put_user(cnow.buf_overrun, &p_cuser->buf_overrun); | |
4191 | if (ret_val) | |
4192 | return ret_val; | |
4193 | ret_val = 0; | |
4194 | break; | |
4195 | default: | |
4196 | ret_val = -ENOIOCTLCMD; | |
4197 | } | |
1da177e4 LT |
4198 | |
4199 | #ifdef CY_DEBUG_OTHER | |
02f1175c | 4200 | printk(" cyc:cy_ioctl done\n"); |
1da177e4 LT |
4201 | #endif |
4202 | ||
02f1175c JS |
4203 | return ret_val; |
4204 | } /* cy_ioctl */ | |
1da177e4 LT |
4205 | |
4206 | /* | |
4207 | * This routine allows the tty driver to be notified when | |
4208 | * device's termios settings have changed. Note that a | |
4209 | * well-designed tty driver should be prepared to accept the case | |
4210 | * where old == NULL, and try to do something rational. | |
4211 | */ | |
02f1175c | 4212 | static void cy_set_termios(struct tty_struct *tty, struct ktermios *old_termios) |
1da177e4 | 4213 | { |
02f1175c | 4214 | struct cyclades_port *info = (struct cyclades_port *)tty->driver_data; |
1da177e4 LT |
4215 | |
4216 | #ifdef CY_DEBUG_OTHER | |
02f1175c | 4217 | printk("cyc:cy_set_termios ttyC%d\n", info->line); |
1da177e4 LT |
4218 | #endif |
4219 | ||
02f1175c JS |
4220 | if (tty->termios->c_cflag == old_termios->c_cflag && |
4221 | (tty->termios->c_iflag & (IXON | IXANY)) == | |
4222 | (old_termios->c_iflag & (IXON | IXANY))) | |
4223 | return; | |
4224 | set_line_char(info); | |
4225 | ||
4226 | if ((old_termios->c_cflag & CRTSCTS) && | |
4227 | !(tty->termios->c_cflag & CRTSCTS)) { | |
4228 | tty->hw_stopped = 0; | |
4229 | cy_start(tty); | |
4230 | } | |
1da177e4 | 4231 | #if 0 |
02f1175c JS |
4232 | /* |
4233 | * No need to wake up processes in open wait, since they | |
4234 | * sample the CLOCAL flag once, and don't recheck it. | |
4235 | * XXX It's not clear whether the current behavior is correct | |
4236 | * or not. Hence, this may change..... | |
4237 | */ | |
4238 | if (!(old_termios->c_cflag & CLOCAL) && | |
4239 | (tty->termios->c_cflag & CLOCAL)) | |
4240 | wake_up_interruptible(&info->open_wait); | |
1da177e4 | 4241 | #endif |
02f1175c | 4242 | } /* cy_set_termios */ |
1da177e4 LT |
4243 | |
4244 | /* This function is used to send a high-priority XON/XOFF character to | |
4245 | the device. | |
4246 | */ | |
02f1175c | 4247 | static void cy_send_xchar(struct tty_struct *tty, char ch) |
1da177e4 | 4248 | { |
02f1175c | 4249 | struct cyclades_port *info = (struct cyclades_port *)tty->driver_data; |
1da177e4 LT |
4250 | int card, channel; |
4251 | ||
02f1175c | 4252 | if (serial_paranoia_check(info, tty->name, "cy_send_xchar")) |
1da177e4 LT |
4253 | return; |
4254 | ||
02f1175c | 4255 | info->x_char = ch; |
1da177e4 LT |
4256 | |
4257 | if (ch) | |
02f1175c | 4258 | cy_start(tty); |
1da177e4 LT |
4259 | |
4260 | card = info->card; | |
4261 | channel = info->line - cy_card[card].first_line; | |
4262 | ||
02f1175c JS |
4263 | if (IS_CYC_Z(cy_card[card])) { |
4264 | if (ch == STOP_CHAR(tty)) | |
4265 | cyz_issue_cmd(&cy_card[card], channel, C_CM_SENDXOFF, | |
4266 | 0L); | |
4267 | else if (ch == START_CHAR(tty)) | |
4268 | cyz_issue_cmd(&cy_card[card], channel, C_CM_SENDXON, | |
4269 | 0L); | |
1da177e4 LT |
4270 | } |
4271 | } | |
4272 | ||
4273 | /* This routine is called by the upper-layer tty layer to signal | |
4274 | that incoming characters should be throttled because the input | |
4275 | buffers are close to full. | |
4276 | */ | |
02f1175c | 4277 | static void cy_throttle(struct tty_struct *tty) |
1da177e4 | 4278 | { |
02f1175c JS |
4279 | struct cyclades_port *info = (struct cyclades_port *)tty->driver_data; |
4280 | unsigned long flags; | |
4281 | void __iomem *base_addr; | |
4282 | int card, chip, channel, index; | |
1da177e4 LT |
4283 | |
4284 | #ifdef CY_DEBUG_THROTTLE | |
02f1175c | 4285 | char buf[64]; |
1da177e4 | 4286 | |
02f1175c JS |
4287 | printk("cyc:throttle %s: %d....ttyC%d\n", tty_name(tty, buf), |
4288 | tty->ldisc.chars_in_buffer(tty), info->line); | |
1da177e4 LT |
4289 | #endif |
4290 | ||
02f1175c JS |
4291 | if (serial_paranoia_check(info, tty->name, "cy_throttle")) { |
4292 | return; | |
4293 | } | |
4294 | ||
4295 | card = info->card; | |
4296 | ||
4297 | if (I_IXOFF(tty)) { | |
4298 | if (!IS_CYC_Z(cy_card[card])) | |
4299 | cy_send_xchar(tty, STOP_CHAR(tty)); | |
4300 | else | |
4301 | info->throttle = 1; | |
4302 | } | |
1da177e4 | 4303 | |
02f1175c JS |
4304 | if (tty->termios->c_cflag & CRTSCTS) { |
4305 | channel = info->line - cy_card[card].first_line; | |
4306 | if (!IS_CYC_Z(cy_card[card])) { | |
4307 | chip = channel >> 2; | |
4308 | channel &= 0x03; | |
4309 | index = cy_card[card].bus_index; | |
4310 | base_addr = cy_card[card].base_addr + | |
4311 | (cy_chip_offset[chip] << index); | |
4312 | ||
4313 | CY_LOCK(info, flags); | |
4314 | cy_writeb(base_addr + (CyCAR << index), | |
4315 | (u_char) channel); | |
4316 | if (info->rtsdtr_inv) { | |
4317 | cy_writeb(base_addr + (CyMSVR2 << index), | |
4318 | ~CyDTR); | |
4319 | } else { | |
4320 | cy_writeb(base_addr + (CyMSVR1 << index), | |
4321 | ~CyRTS); | |
4322 | } | |
4323 | CY_UNLOCK(info, flags); | |
4324 | } else { | |
4325 | info->throttle = 1; | |
4326 | } | |
4327 | } | |
02f1175c | 4328 | } /* cy_throttle */ |
1da177e4 LT |
4329 | |
4330 | /* | |
4331 | * This routine notifies the tty driver that it should signal | |
4332 | * that characters can now be sent to the tty without fear of | |
4333 | * overrunning the input buffers of the line disciplines. | |
4334 | */ | |
02f1175c | 4335 | static void cy_unthrottle(struct tty_struct *tty) |
1da177e4 | 4336 | { |
02f1175c JS |
4337 | struct cyclades_port *info = (struct cyclades_port *)tty->driver_data; |
4338 | unsigned long flags; | |
4339 | void __iomem *base_addr; | |
4340 | int card, chip, channel, index; | |
1da177e4 LT |
4341 | |
4342 | #ifdef CY_DEBUG_THROTTLE | |
02f1175c JS |
4343 | char buf[64]; |
4344 | ||
4345 | printk("cyc:unthrottle %s: %d....ttyC%d\n", tty_name(tty, buf), | |
4346 | tty->ldisc.chars_in_buffer(tty), info->line); | |
1da177e4 LT |
4347 | #endif |
4348 | ||
02f1175c JS |
4349 | if (serial_paranoia_check(info, tty->name, "cy_unthrottle")) { |
4350 | return; | |
4351 | } | |
1da177e4 | 4352 | |
02f1175c JS |
4353 | if (I_IXOFF(tty)) { |
4354 | if (info->x_char) | |
4355 | info->x_char = 0; | |
4356 | else | |
4357 | cy_send_xchar(tty, START_CHAR(tty)); | |
1da177e4 | 4358 | } |
1da177e4 | 4359 | |
02f1175c JS |
4360 | if (tty->termios->c_cflag & CRTSCTS) { |
4361 | card = info->card; | |
4362 | channel = info->line - cy_card[card].first_line; | |
4363 | if (!IS_CYC_Z(cy_card[card])) { | |
4364 | chip = channel >> 2; | |
4365 | channel &= 0x03; | |
4366 | index = cy_card[card].bus_index; | |
4367 | base_addr = cy_card[card].base_addr + | |
4368 | (cy_chip_offset[chip] << index); | |
4369 | ||
4370 | CY_LOCK(info, flags); | |
4371 | cy_writeb(base_addr + (CyCAR << index), | |
4372 | (u_char) channel); | |
4373 | if (info->rtsdtr_inv) { | |
4374 | cy_writeb(base_addr + (CyMSVR2 << index), | |
4375 | CyDTR); | |
4376 | } else { | |
4377 | cy_writeb(base_addr + (CyMSVR1 << index), | |
4378 | CyRTS); | |
4379 | } | |
4380 | CY_UNLOCK(info, flags); | |
4381 | } else { | |
4382 | info->throttle = 0; | |
4383 | } | |
4384 | } | |
02f1175c | 4385 | } /* cy_unthrottle */ |
1da177e4 LT |
4386 | |
4387 | /* cy_start and cy_stop provide software output flow control as a | |
4388 | function of XON/XOFF, software CTS, and other such stuff. | |
4389 | */ | |
02f1175c | 4390 | static void cy_stop(struct tty_struct *tty) |
1da177e4 | 4391 | { |
02f1175c JS |
4392 | struct cyclades_card *cinfo; |
4393 | struct cyclades_port *info = (struct cyclades_port *)tty->driver_data; | |
4394 | void __iomem *base_addr; | |
4395 | int chip, channel, index; | |
4396 | unsigned long flags; | |
1da177e4 LT |
4397 | |
4398 | #ifdef CY_DEBUG_OTHER | |
02f1175c | 4399 | printk("cyc:cy_stop ttyC%d\n", info->line); /* */ |
1da177e4 LT |
4400 | #endif |
4401 | ||
02f1175c JS |
4402 | if (serial_paranoia_check(info, tty->name, "cy_stop")) |
4403 | return; | |
1da177e4 | 4404 | |
02f1175c JS |
4405 | cinfo = &cy_card[info->card]; |
4406 | channel = info->line - cinfo->first_line; | |
4407 | if (!IS_CYC_Z(*cinfo)) { | |
4408 | index = cinfo->bus_index; | |
4409 | chip = channel >> 2; | |
4410 | channel &= 0x03; | |
4411 | base_addr = cy_card[info->card].base_addr + | |
4412 | (cy_chip_offset[chip] << index); | |
1da177e4 | 4413 | |
02f1175c JS |
4414 | CY_LOCK(info, flags); |
4415 | cy_writeb(base_addr + (CyCAR << index), | |
4416 | (u_char)(channel & 0x0003)); /* index channel */ | |
4417 | cy_writeb(base_addr + (CySRER << index), | |
4418 | cy_readb(base_addr + (CySRER << index)) & ~CyTxRdy); | |
4419 | CY_UNLOCK(info, flags); | |
4420 | } else { | |
096dcfce | 4421 | /* Nothing to do! */ |
02f1175c | 4422 | } |
02f1175c | 4423 | } /* cy_stop */ |
1da177e4 | 4424 | |
02f1175c | 4425 | static void cy_start(struct tty_struct *tty) |
1da177e4 | 4426 | { |
02f1175c JS |
4427 | struct cyclades_card *cinfo; |
4428 | struct cyclades_port *info = (struct cyclades_port *)tty->driver_data; | |
4429 | void __iomem *base_addr; | |
4430 | int chip, channel, index; | |
4431 | unsigned long flags; | |
1da177e4 LT |
4432 | |
4433 | #ifdef CY_DEBUG_OTHER | |
02f1175c | 4434 | printk("cyc:cy_start ttyC%d\n", info->line); /* */ |
1da177e4 LT |
4435 | #endif |
4436 | ||
02f1175c JS |
4437 | if (serial_paranoia_check(info, tty->name, "cy_start")) |
4438 | return; | |
1da177e4 | 4439 | |
02f1175c JS |
4440 | cinfo = &cy_card[info->card]; |
4441 | channel = info->line - cinfo->first_line; | |
4442 | index = cinfo->bus_index; | |
4443 | if (!IS_CYC_Z(*cinfo)) { | |
4444 | chip = channel >> 2; | |
4445 | channel &= 0x03; | |
4446 | base_addr = cy_card[info->card].base_addr + | |
4447 | (cy_chip_offset[chip] << index); | |
1da177e4 | 4448 | |
02f1175c JS |
4449 | CY_LOCK(info, flags); |
4450 | cy_writeb(base_addr + (CyCAR << index), (u_char) (channel & 0x0003)); /* index channel */ | |
4451 | cy_writeb(base_addr + (CySRER << index), | |
4452 | cy_readb(base_addr + (CySRER << index)) | CyTxRdy); | |
4453 | CY_UNLOCK(info, flags); | |
4454 | } else { | |
096dcfce | 4455 | /* Nothing to do! */ |
02f1175c | 4456 | } |
02f1175c | 4457 | } /* cy_start */ |
1da177e4 | 4458 | |
02f1175c | 4459 | static void cy_flush_buffer(struct tty_struct *tty) |
1da177e4 | 4460 | { |
02f1175c JS |
4461 | struct cyclades_port *info = (struct cyclades_port *)tty->driver_data; |
4462 | int card, channel, retval; | |
4463 | unsigned long flags; | |
4464 | ||
1da177e4 | 4465 | #ifdef CY_DEBUG_IO |
02f1175c | 4466 | printk("cyc:cy_flush_buffer ttyC%d\n", info->line); /* */ |
1da177e4 LT |
4467 | #endif |
4468 | ||
02f1175c JS |
4469 | if (serial_paranoia_check(info, tty->name, "cy_flush_buffer")) |
4470 | return; | |
1da177e4 | 4471 | |
02f1175c JS |
4472 | card = info->card; |
4473 | channel = (info->line) - (cy_card[card].first_line); | |
1da177e4 | 4474 | |
1da177e4 | 4475 | CY_LOCK(info, flags); |
02f1175c | 4476 | info->xmit_cnt = info->xmit_head = info->xmit_tail = 0; |
1da177e4 | 4477 | CY_UNLOCK(info, flags); |
1da177e4 | 4478 | |
02f1175c JS |
4479 | if (IS_CYC_Z(cy_card[card])) { /* If it is a Z card, flush the on-board |
4480 | buffers as well */ | |
4481 | CY_LOCK(info, flags); | |
4482 | retval = | |
4483 | cyz_issue_cmd(&cy_card[card], channel, C_CM_FLUSH_TX, 0L); | |
4484 | if (retval != 0) { | |
4485 | printk("cyc: flush_buffer retval on ttyC%d was %x\n", | |
4486 | info->line, retval); | |
4487 | } | |
4488 | CY_UNLOCK(info, flags); | |
4489 | } | |
4490 | tty_wakeup(tty); | |
4491 | wake_up_interruptible(&tty->write_wait); | |
4492 | } /* cy_flush_buffer */ | |
1da177e4 LT |
4493 | |
4494 | /* | |
4495 | * cy_hangup() --- called by tty_hangup() when a hangup is signaled. | |
4496 | */ | |
02f1175c | 4497 | static void cy_hangup(struct tty_struct *tty) |
1da177e4 | 4498 | { |
02f1175c JS |
4499 | struct cyclades_port *info = (struct cyclades_port *)tty->driver_data; |
4500 | ||
1da177e4 | 4501 | #ifdef CY_DEBUG_OTHER |
02f1175c | 4502 | printk("cyc:cy_hangup ttyC%d\n", info->line); /* */ |
1da177e4 LT |
4503 | #endif |
4504 | ||
02f1175c JS |
4505 | if (serial_paranoia_check(info, tty->name, "cy_hangup")) |
4506 | return; | |
1da177e4 | 4507 | |
02f1175c JS |
4508 | cy_flush_buffer(tty); |
4509 | shutdown(info); | |
4510 | info->event = 0; | |
4511 | info->count = 0; | |
1da177e4 | 4512 | #ifdef CY_DEBUG_COUNT |
02f1175c | 4513 | printk("cyc:cy_hangup (%d): setting count to 0\n", current->pid); |
1da177e4 | 4514 | #endif |
02f1175c JS |
4515 | info->tty = NULL; |
4516 | info->flags &= ~ASYNC_NORMAL_ACTIVE; | |
4517 | wake_up_interruptible(&info->open_wait); | |
4518 | } /* cy_hangup */ | |
1da177e4 LT |
4519 | |
4520 | /* | |
4521 | * --------------------------------------------------------------------- | |
4522 | * cy_init() and friends | |
4523 | * | |
4524 | * cy_init() is called at boot-time to initialize the serial driver. | |
4525 | * --------------------------------------------------------------------- | |
4526 | */ | |
4527 | ||
4528 | /* initialize chips on Cyclom-Y card -- return number of valid | |
4529 | chips (which is number of ports/4) */ | |
4530 | static unsigned short __init | |
02f1175c | 4531 | cyy_init_card(void __iomem * true_base_addr, int index) |
1da177e4 | 4532 | { |
02f1175c JS |
4533 | unsigned int chip_number; |
4534 | void __iomem *base_addr; | |
4535 | ||
4536 | cy_writeb(true_base_addr + (Cy_HwReset << index), 0); | |
4537 | /* Cy_HwReset is 0x1400 */ | |
4538 | cy_writeb(true_base_addr + (Cy_ClrIntr << index), 0); | |
4539 | /* Cy_ClrIntr is 0x1800 */ | |
4540 | udelay(500L); | |
4541 | ||
4542 | for (chip_number = 0; chip_number < CyMAX_CHIPS_PER_CARD; chip_number++) { | |
4543 | base_addr = | |
4544 | true_base_addr + (cy_chip_offset[chip_number] << index); | |
4545 | mdelay(1); | |
4546 | if (cy_readb(base_addr + (CyCCR << index)) != 0x00) { | |
4547 | /************* | |
4548 | printk(" chip #%d at %#6lx is never idle (CCR != 0)\n", | |
4549 | chip_number, (unsigned long)base_addr); | |
4550 | *************/ | |
4551 | return chip_number; | |
4552 | } | |
4553 | ||
4554 | cy_writeb(base_addr + (CyGFRCR << index), 0); | |
4555 | udelay(10L); | |
4556 | ||
4557 | /* The Cyclom-16Y does not decode address bit 9 and therefore | |
4558 | cannot distinguish between references to chip 0 and a non- | |
4559 | existent chip 4. If the preceding clearing of the supposed | |
4560 | chip 4 GFRCR register appears at chip 0, there is no chip 4 | |
4561 | and this must be a Cyclom-16Y, not a Cyclom-32Ye. | |
4562 | */ | |
4563 | if (chip_number == 4 && cy_readb(true_base_addr + | |
4564 | (cy_chip_offset[0] << index) + | |
4565 | (CyGFRCR << index)) == 0) { | |
4566 | return chip_number; | |
4567 | } | |
4568 | ||
4569 | cy_writeb(base_addr + (CyCCR << index), CyCHIP_RESET); | |
4570 | mdelay(1); | |
4571 | ||
4572 | if (cy_readb(base_addr + (CyGFRCR << index)) == 0x00) { | |
4573 | /* | |
4574 | printk(" chip #%d at %#6lx is not responding ", | |
4575 | chip_number, (unsigned long)base_addr); | |
4576 | printk("(GFRCR stayed 0)\n", | |
4577 | */ | |
4578 | return chip_number; | |
4579 | } | |
4580 | if ((0xf0 & (cy_readb(base_addr + (CyGFRCR << index)))) != | |
4581 | 0x40) { | |
4582 | /* | |
4583 | printk(" chip #%d at %#6lx is not valid (GFRCR == " | |
4584 | "%#2x)\n", | |
4585 | chip_number, (unsigned long)base_addr, | |
4586 | base_addr[CyGFRCR<<index]); | |
4587 | */ | |
4588 | return chip_number; | |
4589 | } | |
4590 | cy_writeb(base_addr + (CyGCR << index), CyCH0_SERIAL); | |
4591 | if (cy_readb(base_addr + (CyGFRCR << index)) >= CD1400_REV_J) { | |
4592 | /* It is a CD1400 rev. J or later */ | |
4593 | /* Impossible to reach 5ms with this chip. | |
4594 | Changed to 2ms instead (f = 500 Hz). */ | |
4595 | cy_writeb(base_addr + (CyPPR << index), CyCLOCK_60_2MS); | |
4596 | } else { | |
4597 | /* f = 200 Hz */ | |
4598 | cy_writeb(base_addr + (CyPPR << index), CyCLOCK_25_5MS); | |
4599 | } | |
1da177e4 | 4600 | |
02f1175c JS |
4601 | /* |
4602 | printk(" chip #%d at %#6lx is rev 0x%2x\n", | |
4603 | chip_number, (unsigned long)base_addr, | |
4604 | cy_readb(base_addr+(CyGFRCR<<index))); | |
4605 | */ | |
4606 | } | |
4607 | return chip_number; | |
4608 | } /* cyy_init_card */ | |
1da177e4 LT |
4609 | |
4610 | /* | |
4611 | * --------------------------------------------------------------------- | |
4612 | * cy_detect_isa() - Probe for Cyclom-Y/ISA boards. | |
4613 | * sets global variables and return the number of ISA boards found. | |
4614 | * --------------------------------------------------------------------- | |
4615 | */ | |
02f1175c | 4616 | static int __init cy_detect_isa(void) |
1da177e4 LT |
4617 | { |
4618 | #ifdef CONFIG_ISA | |
02f1175c JS |
4619 | unsigned short cy_isa_irq, nboard; |
4620 | void __iomem *cy_isa_address; | |
4621 | unsigned short i, j, cy_isa_nchan; | |
1da177e4 | 4622 | #ifdef MODULE |
02f1175c | 4623 | int isparam = 0; |
1da177e4 LT |
4624 | #endif |
4625 | ||
02f1175c | 4626 | nboard = 0; |
1da177e4 LT |
4627 | |
4628 | #ifdef MODULE | |
4629 | /* Check for module parameters */ | |
02f1175c JS |
4630 | for (i = 0; i < NR_CARDS; i++) { |
4631 | if (maddr[i] || i) { | |
4632 | isparam = 1; | |
4633 | cy_isa_addresses[i] = maddr[i]; | |
4634 | } | |
4635 | if (!maddr[i]) | |
4636 | break; | |
1da177e4 LT |
4637 | } |
4638 | #endif | |
4639 | ||
02f1175c JS |
4640 | /* scan the address table probing for Cyclom-Y/ISA boards */ |
4641 | for (i = 0; i < NR_ISA_ADDRS; i++) { | |
4642 | unsigned int isa_address = cy_isa_addresses[i]; | |
4643 | if (isa_address == 0x0000) { | |
096dcfce | 4644 | return nboard; |
02f1175c | 4645 | } |
1da177e4 | 4646 | |
02f1175c | 4647 | /* probe for CD1400... */ |
1da177e4 | 4648 | cy_isa_address = ioremap(isa_address, CyISA_Ywin); |
02f1175c JS |
4649 | cy_isa_nchan = CyPORTS_PER_CHIP * |
4650 | cyy_init_card(cy_isa_address, 0); | |
4651 | if (cy_isa_nchan == 0) { | |
4652 | continue; | |
4653 | } | |
1da177e4 LT |
4654 | #ifdef MODULE |
4655 | if (isparam && irq[i]) | |
02f1175c | 4656 | cy_isa_irq = irq[i]; |
1da177e4 LT |
4657 | else |
4658 | #endif | |
02f1175c JS |
4659 | /* find out the board's irq by probing */ |
4660 | cy_isa_irq = detect_isa_irq(cy_isa_address); | |
4661 | if (cy_isa_irq == 0) { | |
4662 | printk("Cyclom-Y/ISA found at 0x%lx ", | |
4663 | (unsigned long)cy_isa_address); | |
4664 | printk("but the IRQ could not be detected.\n"); | |
4665 | continue; | |
4666 | } | |
4667 | ||
4668 | if ((cy_next_channel + cy_isa_nchan) > NR_PORTS) { | |
4669 | printk("Cyclom-Y/ISA found at 0x%lx ", | |
4670 | (unsigned long)cy_isa_address); | |
4671 | printk("but no more channels are available.\n"); | |
4672 | printk("Change NR_PORTS in cyclades.c and recompile " | |
4673 | "kernel.\n"); | |
096dcfce | 4674 | return nboard; |
02f1175c JS |
4675 | } |
4676 | /* fill the next cy_card structure available */ | |
4677 | for (j = 0; j < NR_CARDS; j++) { | |
4678 | if (cy_card[j].base_addr == 0) | |
4679 | break; | |
4680 | } | |
4681 | if (j == NR_CARDS) { /* no more cy_cards available */ | |
4682 | printk("Cyclom-Y/ISA found at 0x%lx ", | |
4683 | (unsigned long)cy_isa_address); | |
4684 | printk("but no more cards can be used .\n"); | |
4685 | printk("Change NR_CARDS in cyclades.c and recompile " | |
4686 | "kernel.\n"); | |
096dcfce | 4687 | return nboard; |
02f1175c JS |
4688 | } |
4689 | ||
4690 | /* allocate IRQ */ | |
4691 | if (request_irq(cy_isa_irq, cyy_interrupt, | |
4692 | IRQF_DISABLED, "Cyclom-Y", &cy_card[j])) { | |
4693 | printk("Cyclom-Y/ISA found at 0x%lx ", | |
4694 | (unsigned long)cy_isa_address); | |
4695 | printk("but could not allocate IRQ#%d.\n", cy_isa_irq); | |
096dcfce | 4696 | return nboard; |
02f1175c JS |
4697 | } |
4698 | ||
4699 | /* set cy_card */ | |
4700 | cy_card[j].base_addr = cy_isa_address; | |
4701 | cy_card[j].ctl_addr = NULL; | |
4702 | cy_card[j].irq = (int)cy_isa_irq; | |
4703 | cy_card[j].bus_index = 0; | |
4704 | cy_card[j].first_line = cy_next_channel; | |
4705 | cy_card[j].num_chips = cy_isa_nchan / 4; | |
4706 | nboard++; | |
4707 | ||
4708 | /* print message */ | |
4709 | printk("Cyclom-Y/ISA #%d: 0x%lx-0x%lx, IRQ%d, ", | |
4710 | j + 1, (unsigned long)cy_isa_address, | |
4711 | (unsigned long)(cy_isa_address + (CyISA_Ywin - 1)), | |
4712 | cy_isa_irq); | |
4713 | printk("%d channels starting from port %d.\n", | |
4714 | cy_isa_nchan, cy_next_channel); | |
4715 | cy_next_channel += cy_isa_nchan; | |
4716 | } | |
096dcfce | 4717 | return nboard; |
1da177e4 | 4718 | #else |
096dcfce | 4719 | return 0; |
02f1175c JS |
4720 | #endif /* CONFIG_ISA */ |
4721 | } /* cy_detect_isa */ | |
1da177e4 | 4722 | |
02f1175c | 4723 | static void plx_init(void __iomem * addr, uclong initctl) |
1da177e4 | 4724 | { |
02f1175c JS |
4725 | /* Reset PLX */ |
4726 | cy_writel(addr + initctl, cy_readl(addr + initctl) | 0x40000000); | |
4727 | udelay(100L); | |
4728 | cy_writel(addr + initctl, cy_readl(addr + initctl) & ~0x40000000); | |
4729 | ||
4730 | /* Reload Config. Registers from EEPROM */ | |
4731 | cy_writel(addr + initctl, cy_readl(addr + initctl) | 0x20000000); | |
4732 | udelay(100L); | |
4733 | cy_writel(addr + initctl, cy_readl(addr + initctl) & ~0x20000000); | |
1da177e4 LT |
4734 | } |
4735 | ||
4736 | /* | |
4737 | * --------------------------------------------------------------------- | |
4738 | * cy_detect_pci() - Test PCI bus presence and Cyclom-Ye/PCI. | |
4739 | * sets global variables and return the number of PCI boards found. | |
4740 | * --------------------------------------------------------------------- | |
4741 | */ | |
02f1175c | 4742 | static int __init cy_detect_pci(void) |
1da177e4 LT |
4743 | { |
4744 | #ifdef CONFIG_PCI | |
4745 | ||
02f1175c JS |
4746 | struct pci_dev *pdev = NULL; |
4747 | unsigned char cyy_rev_id; | |
4748 | unsigned char cy_pci_irq = 0; | |
4749 | uclong cy_pci_phys0, cy_pci_phys2; | |
4750 | void __iomem *cy_pci_addr0, *cy_pci_addr2; | |
4751 | unsigned short i, j, cy_pci_nchan, plx_ver; | |
4752 | unsigned short device_id, dev_index = 0; | |
4753 | uclong mailbox; | |
4754 | uclong ZeIndex = 0; | |
4755 | void __iomem *Ze_addr0[NR_CARDS], *Ze_addr2[NR_CARDS]; | |
4756 | uclong Ze_phys0[NR_CARDS], Ze_phys2[NR_CARDS]; | |
4757 | unsigned char Ze_irq[NR_CARDS]; | |
4758 | struct pci_dev *Ze_pdev[NR_CARDS]; | |
4759 | ||
4760 | for (i = 0; i < NR_CARDS; i++) { | |
4761 | /* look for a Cyclades card by vendor and device id */ | |
4762 | while ((device_id = cy_pci_dev_id[dev_index]) != 0) { | |
4763 | if ((pdev = pci_get_device(PCI_VENDOR_ID_CYCLADES, | |
4764 | device_id, pdev)) == NULL) { | |
4765 | dev_index++; /* try next device id */ | |
4766 | } else { | |
4767 | break; /* found a board */ | |
4768 | } | |
4769 | } | |
1da177e4 LT |
4770 | |
4771 | if (device_id == 0) | |
02f1175c | 4772 | break; |
1da177e4 LT |
4773 | |
4774 | if (pci_enable_device(pdev)) | |
02f1175c | 4775 | continue; |
1da177e4 | 4776 | |
02f1175c | 4777 | /* read PCI configuration area */ |
1da177e4 LT |
4778 | cy_pci_irq = pdev->irq; |
4779 | cy_pci_phys0 = pci_resource_start(pdev, 0); | |
4780 | cy_pci_phys2 = pci_resource_start(pdev, 2); | |
4781 | pci_read_config_byte(pdev, PCI_REVISION_ID, &cyy_rev_id); | |
4782 | ||
4783 | device_id &= ~PCI_DEVICE_ID_MASK; | |
4784 | ||
02f1175c JS |
4785 | if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo || |
4786 | device_id == PCI_DEVICE_ID_CYCLOM_Y_Hi) { | |
1da177e4 | 4787 | #ifdef CY_PCI_DEBUG |
02f1175c JS |
4788 | printk("Cyclom-Y/PCI (bus=0x0%x, pci_id=0x%x, ", |
4789 | pdev->bus->number, pdev->devfn); | |
4790 | printk("rev_id=%d) IRQ%d\n", | |
4791 | cyy_rev_id, (int)cy_pci_irq); | |
4792 | printk("Cyclom-Y/PCI:found winaddr=0x%lx " | |
4793 | "ctladdr=0x%lx\n", | |
4794 | (ulong)cy_pci_phys2, (ulong)cy_pci_phys0); | |
1da177e4 LT |
4795 | #endif |
4796 | ||
02f1175c JS |
4797 | if (pci_resource_flags(pdev, 2) & IORESOURCE_IO) { |
4798 | printk(" Warning: PCI I/O bit incorrectly " | |
4799 | "set. Ignoring it...\n"); | |
4800 | pdev->resource[2].flags &= ~IORESOURCE_IO; | |
4801 | } | |
1da177e4 | 4802 | |
02f1175c JS |
4803 | /* Although we don't use this I/O region, we should |
4804 | request it from the kernel anyway, to avoid problems | |
4805 | with other drivers accessing it. */ | |
4806 | if (pci_request_regions(pdev, "Cyclom-Y") != 0) { | |
4807 | printk(KERN_ERR "cyclades: failed to reserve " | |
4808 | "PCI resources\n"); | |
4809 | continue; | |
4810 | } | |
1da177e4 | 4811 | #if defined(__alpha__) |
02f1175c JS |
4812 | if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo) { /* below 1M? */ |
4813 | printk("Cyclom-Y/PCI (bus=0x0%x, pci_id=0x%x, ", | |
4814 | pdev->bus->number, pdev->devfn); | |
4815 | printk("rev_id=%d) IRQ%d\n", | |
4816 | cyy_rev_id, (int)cy_pci_irq); | |
4817 | printk("Cyclom-Y/PCI:found winaddr=0x%lx " | |
4818 | "ctladdr=0x%lx\n", | |
4819 | (ulong)cy_pci_phys2, | |
4820 | (ulong)cy_pci_phys0); | |
4821 | printk("Cyclom-Y/PCI not supported for low " | |
4822 | "addresses in Alpha systems.\n"); | |
4823 | i--; | |
4824 | continue; | |
4825 | } | |
1da177e4 | 4826 | #endif |
02f1175c JS |
4827 | cy_pci_addr0 = ioremap(cy_pci_phys0, CyPCI_Yctl); |
4828 | cy_pci_addr2 = ioremap(cy_pci_phys2, CyPCI_Ywin); | |
1da177e4 LT |
4829 | |
4830 | #ifdef CY_PCI_DEBUG | |
02f1175c JS |
4831 | printk("Cyclom-Y/PCI: relocate winaddr=0x%lx " |
4832 | "ctladdr=0x%lx\n", | |
4833 | (u_long)cy_pci_addr2, (u_long)cy_pci_addr0); | |
1da177e4 | 4834 | #endif |
02f1175c JS |
4835 | cy_pci_nchan = (unsigned short)(CyPORTS_PER_CHIP * |
4836 | cyy_init_card(cy_pci_addr2, 1)); | |
4837 | if (cy_pci_nchan == 0) { | |
4838 | printk("Cyclom-Y PCI host card with "); | |
4839 | printk("no Serial-Modules at 0x%lx.\n", | |
4840 | (ulong) cy_pci_phys2); | |
4841 | i--; | |
4842 | continue; | |
4843 | } | |
4844 | if ((cy_next_channel + cy_pci_nchan) > NR_PORTS) { | |
4845 | printk("Cyclom-Y/PCI found at 0x%lx ", | |
4846 | (ulong) cy_pci_phys2); | |
4847 | printk("but no channels are available.\n"); | |
4848 | printk("Change NR_PORTS in cyclades.c and " | |
4849 | "recompile kernel.\n"); | |
096dcfce | 4850 | return i; |
02f1175c JS |
4851 | } |
4852 | /* fill the next cy_card structure available */ | |
4853 | for (j = 0; j < NR_CARDS; j++) { | |
4854 | if (cy_card[j].base_addr == 0) | |
4855 | break; | |
4856 | } | |
4857 | if (j == NR_CARDS) { /* no more cy_cards available */ | |
4858 | printk("Cyclom-Y/PCI found at 0x%lx ", | |
4859 | (ulong) cy_pci_phys2); | |
4860 | printk("but no more cards can be used.\n"); | |
4861 | printk("Change NR_CARDS in cyclades.c and " | |
4862 | "recompile kernel.\n"); | |
096dcfce | 4863 | return i; |
02f1175c | 4864 | } |
1da177e4 | 4865 | |
02f1175c JS |
4866 | /* allocate IRQ */ |
4867 | if (request_irq(cy_pci_irq, cyy_interrupt, | |
4868 | IRQF_SHARED, "Cyclom-Y", &cy_card[j])) { | |
4869 | printk("Cyclom-Y/PCI found at 0x%lx ", | |
4870 | (ulong) cy_pci_phys2); | |
4871 | printk("but could not allocate IRQ%d.\n", | |
4872 | cy_pci_irq); | |
096dcfce | 4873 | return i; |
02f1175c JS |
4874 | } |
4875 | ||
4876 | /* set cy_card */ | |
4877 | cy_card[j].base_phys = (ulong) cy_pci_phys2; | |
4878 | cy_card[j].ctl_phys = (ulong) cy_pci_phys0; | |
4879 | cy_card[j].base_addr = cy_pci_addr2; | |
4880 | cy_card[j].ctl_addr = cy_pci_addr0; | |
4881 | cy_card[j].irq = (int)cy_pci_irq; | |
4882 | cy_card[j].bus_index = 1; | |
4883 | cy_card[j].first_line = cy_next_channel; | |
4884 | cy_card[j].num_chips = cy_pci_nchan / 4; | |
4885 | cy_card[j].pdev = pdev; | |
4886 | ||
4887 | /* enable interrupts in the PCI interface */ | |
4888 | plx_ver = cy_readb(cy_pci_addr2 + CyPLX_VER) & 0x0f; | |
4889 | switch (plx_ver) { | |
4890 | case PLX_9050: | |
4891 | ||
4892 | cy_writeb(cy_pci_addr0 + 0x4c, 0x43); | |
4893 | break; | |
4894 | ||
4895 | case PLX_9060: | |
4896 | case PLX_9080: | |
4897 | default: /* Old boards, use PLX_9060 */ | |
4898 | ||
4899 | plx_init(cy_pci_addr0, 0x6c); | |
4900 | /* For some yet unknown reason, once the PLX9060 reloads | |
4901 | the EEPROM, the IRQ is lost and, thus, we have to | |
4902 | re-write it to the PCI config. registers. | |
4903 | This will remain here until we find a permanent | |
4904 | fix. */ | |
4905 | pci_write_config_byte(pdev, PCI_INTERRUPT_LINE, | |
4906 | cy_pci_irq); | |
4907 | ||
4908 | cy_writew(cy_pci_addr0 + 0x68, | |
4909 | cy_readw(cy_pci_addr0 + | |
4910 | 0x68) | 0x0900); | |
4911 | break; | |
4912 | } | |
4913 | ||
4914 | /* print message */ | |
4915 | printk("Cyclom-Y/PCI #%d: 0x%lx-0x%lx, IRQ%d, ", | |
4916 | j + 1, (ulong)cy_pci_phys2, | |
4917 | (ulong) (cy_pci_phys2 + CyPCI_Ywin - 1), | |
4918 | (int)cy_pci_irq); | |
4919 | printk("%d channels starting from port %d.\n", | |
4920 | cy_pci_nchan, cy_next_channel); | |
4921 | ||
4922 | cy_next_channel += cy_pci_nchan; | |
4923 | } else if (device_id == PCI_DEVICE_ID_CYCLOM_Z_Lo) { | |
4924 | /* print message */ | |
4925 | printk("Cyclades-Z/PCI (bus=0x0%x, pci_id=0x%x, ", | |
4926 | pdev->bus->number, pdev->devfn); | |
4927 | printk("rev_id=%d) IRQ%d\n", | |
4928 | cyy_rev_id, (int)cy_pci_irq); | |
4929 | printk("Cyclades-Z/PCI: found winaddr=0x%lx " | |
4930 | "ctladdr=0x%lx\n", | |
4931 | (ulong)cy_pci_phys2, (ulong)cy_pci_phys0); | |
4932 | printk("Cyclades-Z/PCI not supported for low " | |
4933 | "addresses\n"); | |
4934 | break; | |
4935 | } else if (device_id == PCI_DEVICE_ID_CYCLOM_Z_Hi) { | |
1da177e4 | 4936 | #ifdef CY_PCI_DEBUG |
02f1175c JS |
4937 | printk("Cyclades-Z/PCI (bus=0x0%x, pci_id=0x%x, ", |
4938 | pdev->bus->number, pdev->devfn); | |
4939 | printk("rev_id=%d) IRQ%d\n", | |
4940 | cyy_rev_id, (int)cy_pci_irq); | |
4941 | printk("Cyclades-Z/PCI: found winaddr=0x%lx " | |
4942 | "ctladdr=0x%lx\n", | |
4943 | (ulong) cy_pci_phys2, (ulong) cy_pci_phys0); | |
1da177e4 | 4944 | #endif |
02f1175c JS |
4945 | cy_pci_addr0 = ioremap(cy_pci_phys0, CyPCI_Zctl); |
4946 | ||
4947 | /* Disable interrupts on the PLX before resetting it */ | |
4948 | cy_writew(cy_pci_addr0 + 0x68, | |
4949 | cy_readw(cy_pci_addr0 + 0x68) & ~0x0900); | |
4950 | ||
4951 | plx_init(cy_pci_addr0, 0x6c); | |
4952 | /* For some yet unknown reason, once the PLX9060 reloads | |
4953 | the EEPROM, the IRQ is lost and, thus, we have to | |
4954 | re-write it to the PCI config. registers. | |
4955 | This will remain here until we find a permanent | |
4956 | fix. */ | |
4957 | pci_write_config_byte(pdev, PCI_INTERRUPT_LINE, | |
4958 | cy_pci_irq); | |
4959 | ||
4960 | mailbox = | |
4961 | (uclong)cy_readl(&((struct RUNTIME_9060 __iomem *) | |
4962 | cy_pci_addr0)->mail_box_0); | |
4963 | ||
4964 | if (pci_resource_flags(pdev, 2) & IORESOURCE_IO) { | |
4965 | printk(" Warning: PCI I/O bit incorrectly " | |
4966 | "set. Ignoring it...\n"); | |
4967 | pdev->resource[2].flags &= ~IORESOURCE_IO; | |
4968 | } | |
1da177e4 | 4969 | |
02f1175c JS |
4970 | /* Although we don't use this I/O region, we should |
4971 | request it from the kernel anyway, to avoid problems | |
4972 | with other drivers accessing it. */ | |
4973 | if (pci_request_regions(pdev, "Cyclades-Z") != 0) { | |
4974 | printk(KERN_ERR "cyclades: failed to reserve " | |
4975 | "PCI resources\n"); | |
4976 | continue; | |
4977 | } | |
4978 | ||
4979 | if (mailbox == ZE_V1) { | |
4980 | cy_pci_addr2 = ioremap(cy_pci_phys2, | |
4981 | CyPCI_Ze_win); | |
4982 | if (ZeIndex == NR_CARDS) { | |
4983 | printk("Cyclades-Ze/PCI found at " | |
4984 | "0x%lx but no more cards can " | |
4985 | "be used.\nChange NR_CARDS in " | |
4986 | "cyclades.c and recompile " | |
4987 | "kernel.\n", | |
4988 | (ulong)cy_pci_phys2); | |
4989 | } else { | |
4990 | Ze_phys0[ZeIndex] = cy_pci_phys0; | |
4991 | Ze_phys2[ZeIndex] = cy_pci_phys2; | |
4992 | Ze_addr0[ZeIndex] = cy_pci_addr0; | |
4993 | Ze_addr2[ZeIndex] = cy_pci_addr2; | |
4994 | Ze_irq[ZeIndex] = cy_pci_irq; | |
4995 | Ze_pdev[ZeIndex] = pdev; | |
4996 | ZeIndex++; | |
4997 | } | |
4998 | i--; | |
4999 | continue; | |
5000 | } else { | |
5001 | cy_pci_addr2 = ioremap(cy_pci_phys2,CyPCI_Zwin); | |
5002 | } | |
1da177e4 LT |
5003 | |
5004 | #ifdef CY_PCI_DEBUG | |
02f1175c JS |
5005 | printk("Cyclades-Z/PCI: relocate winaddr=0x%lx " |
5006 | "ctladdr=0x%lx\n", | |
5007 | (ulong) cy_pci_addr2, (ulong) cy_pci_addr0); | |
5008 | if (mailbox == ZO_V1) { | |
5009 | cy_writel(&((struct RUNTIME_9060 *) | |
5010 | (cy_pci_addr0))->loc_addr_base, | |
5011 | WIN_CREG); | |
096dcfce | 5012 | PAUSE; |
02f1175c JS |
5013 | printk("Cyclades-8Zo/PCI: FPGA id %lx, ver " |
5014 | "%lx\n", (ulong) (0xff & | |
5015 | cy_readl(&((struct CUSTOM_REG *) | |
5016 | (cy_pci_addr2))->fpga_id)), | |
5017 | (ulong)(0xff & | |
5018 | cy_readl(&((struct CUSTOM_REG *) | |
5019 | (cy_pci_addr2))-> | |
5020 | fpga_version))); | |
5021 | cy_writel(&((struct RUNTIME_9060 *) | |
5022 | (cy_pci_addr0))->loc_addr_base, | |
5023 | WIN_RAM); | |
5024 | } else { | |
5025 | printk("Cyclades-Z/PCI: New Cyclades-Z board. " | |
5026 | "FPGA not loaded\n"); | |
5027 | } | |
1da177e4 | 5028 | #endif |
02f1175c JS |
5029 | /* The following clears the firmware id word. This |
5030 | ensures that the driver will not attempt to talk to | |
5031 | the board until it has been properly initialized. | |
5032 | */ | |
096dcfce | 5033 | PAUSE; |
02f1175c JS |
5034 | if ((mailbox == ZO_V1) || (mailbox == ZO_V2)) |
5035 | cy_writel(cy_pci_addr2 + ID_ADDRESS, 0L); | |
5036 | ||
5037 | /* This must be a Cyclades-8Zo/PCI. The extendable | |
5038 | version will have a different device_id and will | |
5039 | be allocated its maximum number of ports. */ | |
5040 | cy_pci_nchan = 8; | |
5041 | ||
5042 | if ((cy_next_channel + cy_pci_nchan) > NR_PORTS) { | |
5043 | printk("Cyclades-8Zo/PCI found at 0x%lx but" | |
5044 | "no channels are available.\nChange " | |
5045 | "NR_PORTS in cyclades.c and recompile " | |
5046 | "kernel.\n", (ulong)cy_pci_phys2); | |
096dcfce | 5047 | return i; |
02f1175c | 5048 | } |
1da177e4 | 5049 | |
02f1175c JS |
5050 | /* fill the next cy_card structure available */ |
5051 | for (j = 0; j < NR_CARDS; j++) { | |
5052 | if (cy_card[j].base_addr == 0) | |
5053 | break; | |
5054 | } | |
5055 | if (j == NR_CARDS) { /* no more cy_cards available */ | |
5056 | printk("Cyclades-8Zo/PCI found at 0x%lx but" | |
5057 | "no more cards can be used.\nChange " | |
5058 | "NR_CARDS in cyclades.c and recompile " | |
5059 | "kernel.\n", (ulong)cy_pci_phys2); | |
096dcfce | 5060 | return i; |
02f1175c JS |
5061 | } |
5062 | #ifdef CONFIG_CYZ_INTR | |
5063 | /* allocate IRQ only if board has an IRQ */ | |
5064 | if ((cy_pci_irq != 0) && (cy_pci_irq != 255)) { | |
5065 | if (request_irq(cy_pci_irq, cyz_interrupt, | |
5066 | IRQF_SHARED, "Cyclades-Z", | |
5067 | &cy_card[j])) { | |
5068 | printk("Cyclom-8Zo/PCI found at 0x%lx " | |
5069 | "but could not allocate " | |
5070 | "IRQ%d.\n", (ulong)cy_pci_phys2, | |
5071 | cy_pci_irq); | |
096dcfce | 5072 | return i; |
02f1175c JS |
5073 | } |
5074 | } | |
5075 | #endif /* CONFIG_CYZ_INTR */ | |
5076 | ||
5077 | /* set cy_card */ | |
5078 | cy_card[j].base_phys = cy_pci_phys2; | |
5079 | cy_card[j].ctl_phys = cy_pci_phys0; | |
5080 | cy_card[j].base_addr = cy_pci_addr2; | |
5081 | cy_card[j].ctl_addr = cy_pci_addr0; | |
5082 | cy_card[j].irq = (int)cy_pci_irq; | |
5083 | cy_card[j].bus_index = 1; | |
5084 | cy_card[j].first_line = cy_next_channel; | |
5085 | cy_card[j].num_chips = -1; | |
5086 | cy_card[j].pdev = pdev; | |
5087 | ||
5088 | /* print message */ | |
1da177e4 | 5089 | #ifdef CONFIG_CYZ_INTR |
02f1175c JS |
5090 | /* don't report IRQ if board is no IRQ */ |
5091 | if ((cy_pci_irq != 0) && (cy_pci_irq != 255)) | |
5092 | printk("Cyclades-8Zo/PCI #%d: 0x%lx-0x%lx, " | |
5093 | "IRQ%d, ", j + 1, (ulong)cy_pci_phys2, | |
5094 | (ulong) (cy_pci_phys2 + CyPCI_Zwin - 1), | |
5095 | (int)cy_pci_irq); | |
5096 | else | |
5097 | #endif /* CONFIG_CYZ_INTR */ | |
5098 | printk("Cyclades-8Zo/PCI #%d: 0x%lx-0x%lx, ", | |
5099 | j + 1, (ulong)cy_pci_phys2, | |
5100 | (ulong)(cy_pci_phys2 + CyPCI_Zwin - 1)); | |
5101 | ||
5102 | printk("%d channels starting from port %d.\n", | |
5103 | cy_pci_nchan, cy_next_channel); | |
5104 | cy_next_channel += cy_pci_nchan; | |
1da177e4 | 5105 | } |
02f1175c | 5106 | } |
1da177e4 | 5107 | |
02f1175c JS |
5108 | for (; ZeIndex != 0 && i < NR_CARDS; i++) { |
5109 | cy_pci_phys0 = Ze_phys0[0]; | |
5110 | cy_pci_phys2 = Ze_phys2[0]; | |
5111 | cy_pci_addr0 = Ze_addr0[0]; | |
5112 | cy_pci_addr2 = Ze_addr2[0]; | |
5113 | cy_pci_irq = Ze_irq[0]; | |
5114 | pdev = Ze_pdev[0]; | |
5115 | for (j = 0; j < ZeIndex - 1; j++) { | |
5116 | Ze_phys0[j] = Ze_phys0[j + 1]; | |
5117 | Ze_phys2[j] = Ze_phys2[j + 1]; | |
5118 | Ze_addr0[j] = Ze_addr0[j + 1]; | |
5119 | Ze_addr2[j] = Ze_addr2[j + 1]; | |
5120 | Ze_irq[j] = Ze_irq[j + 1]; | |
5121 | Ze_pdev[j] = Ze_pdev[j + 1]; | |
5122 | } | |
5123 | ZeIndex--; | |
5124 | mailbox = (uclong)cy_readl(&((struct RUNTIME_9060 __iomem *) | |
5125 | cy_pci_addr0)->mail_box_0); | |
1da177e4 | 5126 | #ifdef CY_PCI_DEBUG |
02f1175c JS |
5127 | printk("Cyclades-Z/PCI: relocate winaddr=0x%lx ctladdr=0x%lx\n", |
5128 | (ulong)cy_pci_addr2, (ulong)cy_pci_addr0); | |
5129 | printk("Cyclades-Z/PCI: New Cyclades-Z board. FPGA not " | |
5130 | "loaded\n"); | |
1da177e4 | 5131 | #endif |
096dcfce | 5132 | PAUSE; |
02f1175c JS |
5133 | /* This must be the new Cyclades-Ze/PCI. */ |
5134 | cy_pci_nchan = ZE_V1_NPORTS; | |
5135 | ||
5136 | if ((cy_next_channel + cy_pci_nchan) > NR_PORTS) { | |
5137 | printk("Cyclades-Ze/PCI found at 0x%lx but no channels " | |
5138 | "are available.\nChange NR_PORTS in cyclades.c " | |
5139 | "and recompile kernel.\n", | |
5140 | (ulong) cy_pci_phys2); | |
096dcfce | 5141 | return i; |
02f1175c | 5142 | } |
1da177e4 | 5143 | |
02f1175c JS |
5144 | /* fill the next cy_card structure available */ |
5145 | for (j = 0; j < NR_CARDS; j++) { | |
5146 | if (cy_card[j].base_addr == 0) | |
5147 | break; | |
5148 | } | |
5149 | if (j == NR_CARDS) { /* no more cy_cards available */ | |
5150 | printk("Cyclades-Ze/PCI found at 0x%lx but no more " | |
5151 | "cards can be used.\nChange NR_CARDS in " | |
5152 | "cyclades.c and recompile kernel.\n", | |
5153 | (ulong) cy_pci_phys2); | |
096dcfce | 5154 | return i; |
02f1175c | 5155 | } |
1da177e4 | 5156 | #ifdef CONFIG_CYZ_INTR |
02f1175c JS |
5157 | /* allocate IRQ only if board has an IRQ */ |
5158 | if ((cy_pci_irq != 0) && (cy_pci_irq != 255)) { | |
5159 | if (request_irq(cy_pci_irq, cyz_interrupt, | |
5160 | IRQF_SHARED, "Cyclades-Z", | |
5161 | &cy_card[j])) { | |
5162 | printk("Cyclom-Ze/PCI found at 0x%lx ", | |
5163 | (ulong) cy_pci_phys2); | |
5164 | printk("but could not allocate IRQ%d.\n", | |
5165 | cy_pci_irq); | |
096dcfce | 5166 | return i; |
02f1175c | 5167 | } |
1da177e4 | 5168 | } |
02f1175c JS |
5169 | #endif /* CONFIG_CYZ_INTR */ |
5170 | ||
5171 | /* set cy_card */ | |
5172 | cy_card[j].base_phys = cy_pci_phys2; | |
5173 | cy_card[j].ctl_phys = cy_pci_phys0; | |
5174 | cy_card[j].base_addr = cy_pci_addr2; | |
5175 | cy_card[j].ctl_addr = cy_pci_addr0; | |
5176 | cy_card[j].irq = (int)cy_pci_irq; | |
5177 | cy_card[j].bus_index = 1; | |
5178 | cy_card[j].first_line = cy_next_channel; | |
5179 | cy_card[j].num_chips = -1; | |
1da177e4 LT |
5180 | cy_card[j].pdev = pdev; |
5181 | ||
02f1175c | 5182 | /* print message */ |
1da177e4 LT |
5183 | #ifdef CONFIG_CYZ_INTR |
5184 | /* don't report IRQ if board is no IRQ */ | |
02f1175c JS |
5185 | if ((cy_pci_irq != 0) && (cy_pci_irq != 255)) |
5186 | printk("Cyclades-Ze/PCI #%d: 0x%lx-0x%lx, IRQ%d, ", | |
5187 | j + 1, (ulong) cy_pci_phys2, | |
5188 | (ulong) (cy_pci_phys2 + CyPCI_Ze_win - 1), | |
5189 | (int)cy_pci_irq); | |
1da177e4 | 5190 | else |
02f1175c JS |
5191 | #endif /* CONFIG_CYZ_INTR */ |
5192 | printk("Cyclades-Ze/PCI #%d: 0x%lx-0x%lx, ", | |
5193 | j + 1, (ulong) cy_pci_phys2, | |
5194 | (ulong) (cy_pci_phys2 + CyPCI_Ze_win - 1)); | |
5195 | ||
5196 | printk("%d channels starting from port %d.\n", | |
5197 | cy_pci_nchan, cy_next_channel); | |
5198 | cy_next_channel += cy_pci_nchan; | |
5199 | } | |
1da177e4 | 5200 | if (ZeIndex != 0) { |
02f1175c JS |
5201 | printk("Cyclades-Ze/PCI found at 0x%x but no more cards can be " |
5202 | "used.\nChange NR_CARDS in cyclades.c and recompile " | |
5203 | "kernel.\n", (unsigned int)Ze_phys2[0]); | |
1da177e4 | 5204 | } |
096dcfce | 5205 | return i; |
1da177e4 | 5206 | #else |
096dcfce | 5207 | return 0; |
02f1175c JS |
5208 | #endif /* ifdef CONFIG_PCI */ |
5209 | } /* cy_detect_pci */ | |
1da177e4 LT |
5210 | |
5211 | /* | |
5212 | * This routine prints out the appropriate serial driver version number | |
5213 | * and identifies which options were configured into this driver. | |
5214 | */ | |
02f1175c | 5215 | static inline void show_version(void) |
1da177e4 | 5216 | { |
096dcfce | 5217 | printk("Cyclades driver " CY_VERSION "\n"); |
02f1175c JS |
5218 | printk(" built %s %s\n", __DATE__, __TIME__); |
5219 | } /* show_version */ | |
5220 | ||
5221 | static int | |
1da177e4 | 5222 | cyclades_get_proc_info(char *buf, char **start, off_t offset, int length, |
02f1175c | 5223 | int *eof, void *data) |
1da177e4 | 5224 | { |
02f1175c JS |
5225 | struct cyclades_port *info; |
5226 | int i; | |
5227 | int len = 0; | |
5228 | off_t begin = 0; | |
5229 | off_t pos = 0; | |
5230 | int size; | |
5231 | __u32 cur_jifs = jiffies; | |
5232 | ||
5233 | size = sprintf(buf, "Dev TimeOpen BytesOut IdleOut BytesIn " | |
5234 | "IdleIn Overruns Ldisc\n"); | |
5235 | ||
5236 | pos += size; | |
1da177e4 | 5237 | len += size; |
1da177e4 | 5238 | |
02f1175c JS |
5239 | /* Output one line for each known port */ |
5240 | for (i = 0; i < NR_PORTS && cy_port[i].line >= 0; i++) { | |
5241 | info = &cy_port[i]; | |
5242 | ||
5243 | if (info->count) | |
5244 | size = sprintf(buf + len, "%3d %8lu %10lu %8lu %10lu " | |
5245 | "%8lu %9lu %6ld\n", info->line, | |
096dcfce | 5246 | (cur_jifs - info->idle_stats.in_use) / HZ, |
02f1175c | 5247 | info->idle_stats.xmit_bytes, |
096dcfce | 5248 | (cur_jifs - info->idle_stats.xmit_idle) / HZ, |
02f1175c | 5249 | info->idle_stats.recv_bytes, |
096dcfce | 5250 | (cur_jifs - info->idle_stats.recv_idle) / HZ, |
02f1175c JS |
5251 | info->idle_stats.overruns, |
5252 | (long)info->tty->ldisc.num); | |
5253 | else | |
5254 | size = sprintf(buf + len, "%3d %8lu %10lu %8lu %10lu " | |
5255 | "%8lu %9lu %6ld\n", | |
5256 | info->line, 0L, 0L, 0L, 0L, 0L, 0L, 0L); | |
5257 | len += size; | |
5258 | pos = begin + len; | |
5259 | ||
5260 | if (pos < offset) { | |
5261 | len = 0; | |
5262 | begin = pos; | |
5263 | } | |
5264 | if (pos > offset + length) | |
5265 | goto done; | |
1da177e4 | 5266 | } |
02f1175c | 5267 | *eof = 1; |
1da177e4 | 5268 | done: |
02f1175c JS |
5269 | *start = buf + (offset - begin); /* Start of wanted data */ |
5270 | len -= (offset - begin); /* Start slop */ | |
5271 | if (len > length) | |
5272 | len = length; /* Ending slop */ | |
5273 | if (len < 0) | |
5274 | len = 0; | |
5275 | return len; | |
1da177e4 LT |
5276 | } |
5277 | ||
5278 | /* The serial driver boot-time initialization code! | |
5279 | Hardware I/O ports are mapped to character special devices on a | |
5280 | first found, first allocated manner. That is, this code searches | |
5281 | for Cyclom cards in the system. As each is found, it is probed | |
5282 | to discover how many chips (and thus how many ports) are present. | |
5283 | These ports are mapped to the tty ports 32 and upward in monotonic | |
5284 | fashion. If an 8-port card is replaced with a 16-port card, the | |
5285 | port mapping on a following card will shift. | |
5286 | ||
5287 | This approach is different from what is used in the other serial | |
5288 | device driver because the Cyclom is more properly a multiplexer, | |
5289 | not just an aggregation of serial ports on one card. | |
5290 | ||
5291 | If there are more cards with more ports than have been | |
5292 | statically allocated above, a warning is printed and the | |
5293 | extra ports are ignored. | |
5294 | */ | |
5295 | ||
b68e31d0 | 5296 | static const struct tty_operations cy_ops = { |
02f1175c JS |
5297 | .open = cy_open, |
5298 | .close = cy_close, | |
5299 | .write = cy_write, | |
5300 | .put_char = cy_put_char, | |
5301 | .flush_chars = cy_flush_chars, | |
5302 | .write_room = cy_write_room, | |
5303 | .chars_in_buffer = cy_chars_in_buffer, | |
5304 | .flush_buffer = cy_flush_buffer, | |
5305 | .ioctl = cy_ioctl, | |
5306 | .throttle = cy_throttle, | |
5307 | .unthrottle = cy_unthrottle, | |
5308 | .set_termios = cy_set_termios, | |
5309 | .stop = cy_stop, | |
5310 | .start = cy_start, | |
5311 | .hangup = cy_hangup, | |
5312 | .break_ctl = cy_break, | |
5313 | .wait_until_sent = cy_wait_until_sent, | |
5314 | .read_proc = cyclades_get_proc_info, | |
5315 | .tiocmget = cy_tiocmget, | |
5316 | .tiocmset = cy_tiocmset, | |
1da177e4 LT |
5317 | }; |
5318 | ||
02f1175c | 5319 | static int __init cy_init(void) |
1da177e4 | 5320 | { |
02f1175c JS |
5321 | struct cyclades_port *info; |
5322 | struct cyclades_card *cinfo; | |
5323 | int number_z_boards = 0; | |
5324 | int board, port, i, index; | |
5325 | unsigned long mailbox; | |
5326 | unsigned short chip_number; | |
5327 | int nports; | |
5328 | ||
5329 | cy_serial_driver = alloc_tty_driver(NR_PORTS); | |
5330 | if (!cy_serial_driver) | |
5331 | return -ENOMEM; | |
5332 | show_version(); | |
5333 | ||
5334 | /* Initialize the tty_driver structure */ | |
5335 | ||
5336 | cy_serial_driver->owner = THIS_MODULE; | |
5337 | cy_serial_driver->driver_name = "cyclades"; | |
5338 | cy_serial_driver->name = "ttyC"; | |
5339 | cy_serial_driver->major = CYCLADES_MAJOR; | |
5340 | cy_serial_driver->minor_start = 0; | |
5341 | cy_serial_driver->type = TTY_DRIVER_TYPE_SERIAL; | |
5342 | cy_serial_driver->subtype = SERIAL_TYPE_NORMAL; | |
5343 | cy_serial_driver->init_termios = tty_std_termios; | |
5344 | cy_serial_driver->init_termios.c_cflag = | |
5345 | B9600 | CS8 | CREAD | HUPCL | CLOCAL; | |
5346 | cy_serial_driver->flags = TTY_DRIVER_REAL_RAW; | |
5347 | tty_set_operations(cy_serial_driver, &cy_ops); | |
5348 | ||
5349 | if (tty_register_driver(cy_serial_driver)) | |
5350 | panic("Couldn't register Cyclades serial driver\n"); | |
5351 | ||
5352 | for (i = 0; i < NR_CARDS; i++) { | |
5353 | /* base_addr=0 indicates board not found */ | |
5354 | cy_card[i].base_addr = NULL; | |
5355 | } | |
5356 | ||
5357 | /* the code below is responsible to find the boards. Each different | |
5358 | type of board has its own detection routine. If a board is found, | |
5359 | the next cy_card structure available is set by the detection | |
5360 | routine. These functions are responsible for checking the | |
5361 | availability of cy_card and cy_port data structures and updating | |
5362 | the cy_next_channel. */ | |
5363 | ||
5364 | /* look for isa boards */ | |
5365 | cy_isa_nboard = cy_detect_isa(); | |
5366 | ||
5367 | /* look for pci boards */ | |
5368 | cy_pci_nboard = cy_detect_pci(); | |
5369 | ||
5370 | cy_nboard = cy_isa_nboard + cy_pci_nboard; | |
5371 | ||
5372 | /* invalidate remaining cy_card structures */ | |
5373 | for (i = 0; i < NR_CARDS; i++) { | |
5374 | if (cy_card[i].base_addr == 0) { | |
5375 | cy_card[i].first_line = -1; | |
5376 | cy_card[i].ctl_addr = NULL; | |
5377 | cy_card[i].irq = 0; | |
5378 | cy_card[i].bus_index = 0; | |
5379 | cy_card[i].first_line = 0; | |
5380 | cy_card[i].num_chips = 0; | |
5381 | } | |
5382 | } | |
5383 | /* invalidate remaining cy_port structures */ | |
5384 | for (i = cy_next_channel; i < NR_PORTS; i++) { | |
5385 | cy_port[i].line = -1; | |
5386 | cy_port[i].magic = -1; | |
5387 | } | |
5388 | ||
5389 | /* initialize per-port data structures for each valid board found */ | |
5390 | for (board = 0; board < cy_nboard; board++) { | |
5391 | cinfo = &cy_card[board]; | |
5392 | if (cinfo->num_chips == -1) { /* Cyclades-Z */ | |
5393 | number_z_boards++; | |
5394 | mailbox = cy_readl(&((struct RUNTIME_9060 __iomem *) | |
5395 | cy_card[board].ctl_addr)-> | |
5396 | mail_box_0); | |
5397 | nports = (mailbox == ZE_V1) ? ZE_V1_NPORTS : 8; | |
5398 | cinfo->intr_enabled = 0; | |
5399 | cinfo->nports = 0; /* Will be correctly set later, after | |
5400 | Z FW is loaded */ | |
5401 | spin_lock_init(&cinfo->card_lock); | |
5402 | for (port = cinfo->first_line; | |
5403 | port < cinfo->first_line + nports; port++) { | |
5404 | info = &cy_port[port]; | |
5405 | info->magic = CYCLADES_MAGIC; | |
5406 | info->type = PORT_STARTECH; | |
5407 | info->card = board; | |
5408 | info->line = port; | |
5409 | info->chip_rev = 0; | |
5410 | info->flags = STD_COM_FLAGS; | |
5411 | info->tty = NULL; | |
5412 | if (mailbox == ZO_V1) | |
5413 | info->xmit_fifo_size = CYZ_FIFO_SIZE; | |
5414 | else | |
5415 | info->xmit_fifo_size = | |
5416 | 4 * CYZ_FIFO_SIZE; | |
5417 | info->cor1 = 0; | |
5418 | info->cor2 = 0; | |
5419 | info->cor3 = 0; | |
5420 | info->cor4 = 0; | |
5421 | info->cor5 = 0; | |
5422 | info->tbpr = 0; | |
5423 | info->tco = 0; | |
5424 | info->rbpr = 0; | |
5425 | info->rco = 0; | |
5426 | info->custom_divisor = 0; | |
5427 | info->close_delay = 5 * HZ / 10; | |
5428 | info->closing_wait = CLOSING_WAIT_DELAY; | |
5429 | info->icount.cts = info->icount.dsr = | |
5430 | info->icount.rng = info->icount.dcd = 0; | |
5431 | info->icount.rx = info->icount.tx = 0; | |
5432 | info->icount.frame = info->icount.parity = 0; | |
5433 | info->icount.overrun = info->icount.brk = 0; | |
5434 | info->x_char = 0; | |
5435 | info->event = 0; | |
5436 | info->count = 0; | |
5437 | info->blocked_open = 0; | |
5438 | info->default_threshold = 0; | |
5439 | info->default_timeout = 0; | |
5440 | INIT_WORK(&info->tqueue, do_softint); | |
5441 | init_waitqueue_head(&info->open_wait); | |
5442 | init_waitqueue_head(&info->close_wait); | |
5443 | init_waitqueue_head(&info->shutdown_wait); | |
5444 | init_waitqueue_head(&info->delta_msr_wait); | |
5445 | /* info->session */ | |
5446 | /* info->pgrp */ | |
5447 | info->read_status_mask = 0; | |
5448 | /* info->timeout */ | |
5449 | /* Bentson's vars */ | |
5450 | info->jiffies[0] = 0; | |
5451 | info->jiffies[1] = 0; | |
5452 | info->jiffies[2] = 0; | |
5453 | info->rflush_count = 0; | |
1da177e4 | 5454 | #ifdef CONFIG_CYZ_INTR |
02f1175c JS |
5455 | init_timer(&cyz_rx_full_timer[port]); |
5456 | cyz_rx_full_timer[port].function = NULL; | |
1da177e4 | 5457 | #endif |
02f1175c JS |
5458 | } |
5459 | continue; | |
5460 | } else { /* Cyclom-Y of some kind */ | |
5461 | index = cinfo->bus_index; | |
5462 | spin_lock_init(&cinfo->card_lock); | |
5463 | cinfo->nports = CyPORTS_PER_CHIP * cinfo->num_chips; | |
5464 | for (port = cinfo->first_line; | |
5465 | port < cinfo->first_line + cinfo->nports; port++) { | |
5466 | info = &cy_port[port]; | |
5467 | info->magic = CYCLADES_MAGIC; | |
5468 | info->type = PORT_CIRRUS; | |
5469 | info->card = board; | |
5470 | info->line = port; | |
5471 | info->flags = STD_COM_FLAGS; | |
5472 | info->tty = NULL; | |
5473 | info->xmit_fifo_size = CyMAX_CHAR_FIFO; | |
5474 | info->cor1 = | |
5475 | CyPARITY_NONE | Cy_1_STOP | Cy_8_BITS; | |
5476 | info->cor2 = CyETC; | |
5477 | info->cor3 = 0x08; /* _very_ small rcv threshold */ | |
5478 | info->cor4 = 0; | |
5479 | info->cor5 = 0; | |
5480 | info->custom_divisor = 0; | |
5481 | info->close_delay = 5 * HZ / 10; | |
5482 | info->closing_wait = CLOSING_WAIT_DELAY; | |
5483 | info->icount.cts = info->icount.dsr = | |
5484 | info->icount.rng = info->icount.dcd = 0; | |
5485 | info->icount.rx = info->icount.tx = 0; | |
5486 | info->icount.frame = info->icount.parity = 0; | |
5487 | info->icount.overrun = info->icount.brk = 0; | |
5488 | chip_number = (port - cinfo->first_line) / 4; | |
5489 | if ((info->chip_rev = | |
5490 | cy_readb(cinfo->base_addr + | |
5491 | (cy_chip_offset[chip_number] << | |
5492 | index) + (CyGFRCR << index))) >= | |
5493 | CD1400_REV_J) { | |
5494 | /* It is a CD1400 rev. J or later */ | |
5495 | info->tbpr = baud_bpr_60[13]; /* Tx BPR */ | |
5496 | info->tco = baud_co_60[13]; /* Tx CO */ | |
5497 | info->rbpr = baud_bpr_60[13]; /* Rx BPR */ | |
5498 | info->rco = baud_co_60[13]; /* Rx CO */ | |
5499 | info->rflow = 0; | |
5500 | info->rtsdtr_inv = 1; | |
5501 | } else { | |
5502 | info->tbpr = baud_bpr_25[13]; /* Tx BPR */ | |
5503 | info->tco = baud_co_25[13]; /* Tx CO */ | |
5504 | info->rbpr = baud_bpr_25[13]; /* Rx BPR */ | |
5505 | info->rco = baud_co_25[13]; /* Rx CO */ | |
5506 | info->rflow = 0; | |
5507 | info->rtsdtr_inv = 0; | |
5508 | } | |
5509 | info->x_char = 0; | |
5510 | info->event = 0; | |
5511 | info->count = 0; | |
5512 | info->blocked_open = 0; | |
5513 | info->default_threshold = 0; | |
5514 | info->default_timeout = 0; | |
5515 | INIT_WORK(&info->tqueue, do_softint); | |
5516 | init_waitqueue_head(&info->open_wait); | |
5517 | init_waitqueue_head(&info->close_wait); | |
5518 | init_waitqueue_head(&info->shutdown_wait); | |
5519 | init_waitqueue_head(&info->delta_msr_wait); | |
5520 | /* info->session */ | |
5521 | /* info->pgrp */ | |
5522 | info->read_status_mask = | |
5523 | CyTIMEOUT | CySPECHAR | CyBREAK | |
5524 | | CyPARITY | CyFRAME | CyOVERRUN; | |
5525 | /* info->timeout */ | |
5526 | } | |
5527 | } | |
5528 | } | |
1da177e4 LT |
5529 | |
5530 | #ifndef CONFIG_CYZ_INTR | |
02f1175c JS |
5531 | if (number_z_boards && !cyz_timeron) { |
5532 | cyz_timeron++; | |
5533 | cyz_timerlist.expires = jiffies + 1; | |
5534 | add_timer(&cyz_timerlist); | |
1da177e4 | 5535 | #ifdef CY_PCI_DEBUG |
02f1175c | 5536 | printk("Cyclades-Z polling initialized\n"); |
1da177e4 | 5537 | #endif |
02f1175c JS |
5538 | } |
5539 | #endif /* CONFIG_CYZ_INTR */ | |
5540 | ||
5541 | return 0; | |
1da177e4 | 5542 | |
02f1175c | 5543 | } /* cy_init */ |
1da177e4 | 5544 | |
02f1175c | 5545 | static void __exit cy_cleanup_module(void) |
1da177e4 | 5546 | { |
02f1175c | 5547 | int i, e1; |
1da177e4 LT |
5548 | |
5549 | #ifndef CONFIG_CYZ_INTR | |
02f1175c JS |
5550 | if (cyz_timeron){ |
5551 | cyz_timeron = 0; | |
5552 | del_timer(&cyz_timerlist); | |
5553 | } | |
1da177e4 LT |
5554 | #endif /* CONFIG_CYZ_INTR */ |
5555 | ||
02f1175c JS |
5556 | if ((e1 = tty_unregister_driver(cy_serial_driver))) |
5557 | printk("cyc: failed to unregister Cyclades serial driver(%d)\n", | |
5558 | e1); | |
1da177e4 | 5559 | |
02f1175c | 5560 | put_tty_driver(cy_serial_driver); |
1da177e4 | 5561 | |
02f1175c JS |
5562 | for (i = 0; i < NR_CARDS; i++) { |
5563 | if (cy_card[i].base_addr) { | |
5564 | iounmap(cy_card[i].base_addr); | |
5565 | if (cy_card[i].ctl_addr) | |
5566 | iounmap(cy_card[i].ctl_addr); | |
5567 | if (cy_card[i].irq | |
1da177e4 | 5568 | #ifndef CONFIG_CYZ_INTR |
02f1175c | 5569 | && cy_card[i].num_chips != -1 /* not a Z card */ |
1da177e4 | 5570 | #endif /* CONFIG_CYZ_INTR */ |
02f1175c JS |
5571 | ) |
5572 | free_irq(cy_card[i].irq, &cy_card[i]); | |
1da177e4 | 5573 | #ifdef CONFIG_PCI |
02f1175c JS |
5574 | if (cy_card[i].pdev) |
5575 | pci_release_regions(cy_card[i].pdev); | |
1da177e4 | 5576 | #endif |
02f1175c JS |
5577 | } |
5578 | } | |
1da177e4 LT |
5579 | } /* cy_cleanup_module */ |
5580 | ||
5581 | module_init(cy_init); | |
5582 | module_exit(cy_cleanup_module); | |
5583 | ||
5584 | MODULE_LICENSE("GPL"); |