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Char: cyclades, fix blockmove
[deliverable/linux.git] / drivers / char / cyclades.c
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CommitLineData
1#undef BLOCKMOVE
2#define Z_WAKE
3#undef Z_EXT_CHARS_IN_BUFFER
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;
282 * fix race condition in -Z buffer management; only -Y needs to explicitly
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
594#define CY_VERSION "2.4"
595
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
600#define NR_CARDS 4
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
607#define NR_PORTS 256
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/*
628 * Include section
629 */
630#include <linux/module.h>
631#include <linux/errno.h>
632#include <linux/signal.h>
633#include <linux/sched.h>
634#include <linux/timer.h>
635#include <linux/interrupt.h>
636#include <linux/tty.h>
637#include <linux/tty_flip.h>
638#include <linux/serial.h>
639#include <linux/major.h>
640#include <linux/string.h>
641#include <linux/fcntl.h>
642#include <linux/ptrace.h>
643#include <linux/cyclades.h>
644#include <linux/mm.h>
645#include <linux/ioport.h>
646#include <linux/init.h>
647#include <linux/delay.h>
648#include <linux/spinlock.h>
649#include <linux/bitops.h>
650
651#include <asm/system.h>
652#include <asm/io.h>
653#include <asm/irq.h>
654#include <asm/uaccess.h>
655
656#define CY_LOCK(info,flags) \
657 do { \
658 spin_lock_irqsave(&info->card->card_lock, flags); \
659 } while (0)
660
661#define CY_UNLOCK(info,flags) \
662 do { \
663 spin_unlock_irqrestore(&info->card->card_lock, flags); \
664 } while (0)
665
666#include <linux/kernel.h>
667#include <linux/pci.h>
668
669#include <linux/stat.h>
670#include <linux/proc_fs.h>
671
672static void cy_throttle(struct tty_struct *tty);
673static void cy_send_xchar(struct tty_struct *tty, char ch);
674
675#define IS_CYC_Z(card) ((card).num_chips == -1)
676
677#define Z_FPGA_CHECK(card) \
678 ((readl(&((struct RUNTIME_9060 __iomem *) \
679 ((card).ctl_addr))->init_ctrl) & (1<<17)) != 0)
680
681#define ISZLOADED(card) (((ZO_V1==readl(&((struct RUNTIME_9060 __iomem *) \
682 ((card).ctl_addr))->mail_box_0)) || \
683 Z_FPGA_CHECK(card)) && \
684 (ZFIRM_ID==readl(&((struct FIRM_ID __iomem *) \
685 ((card).base_addr+ID_ADDRESS))->signature)))
686
687#ifndef SERIAL_XMIT_SIZE
688#define SERIAL_XMIT_SIZE (min(PAGE_SIZE, 4096))
689#endif
690#define WAKEUP_CHARS 256
691
692#define STD_COM_FLAGS (0)
693
694static struct tty_driver *cy_serial_driver;
695
696#ifdef CONFIG_ISA
697/* This is the address lookup table. The driver will probe for
698 Cyclom-Y/ISA boards at all addresses in here. If you want the
699 driver to probe addresses at a different address, add it to
700 this table. If the driver is probing some other board and
701 causing problems, remove the offending address from this table.
702 The cy_setup function extracts additional addresses from the
703 boot options line. The form is "cyclades=address,address..."
704*/
705
706static unsigned int cy_isa_addresses[] = {
707 0xD0000,
708 0xD2000,
709 0xD4000,
710 0xD6000,
711 0xD8000,
712 0xDA000,
713 0xDC000,
714 0xDE000,
715 0, 0, 0, 0, 0, 0, 0, 0
716};
717
718#define NR_ISA_ADDRS ARRAY_SIZE(cy_isa_addresses)
719
720#ifdef MODULE
721static long maddr[NR_CARDS];
722static int irq[NR_CARDS];
723
724module_param_array(maddr, long, NULL, 0);
725module_param_array(irq, int, NULL, 0);
726#endif
727
728#endif /* CONFIG_ISA */
729
730/* This is the per-card data structure containing address, irq, number of
731 channels, etc. This driver supports a maximum of NR_CARDS cards.
732*/
733static struct cyclades_card cy_card[NR_CARDS];
734
735/* This is the per-channel data structure containing pointers, flags
736 and variables for the port. This driver supports a maximum of NR_PORTS.
737*/
738static struct cyclades_port cy_port[NR_PORTS];
739
740static int cy_next_channel; /* next minor available */
741
742/*
743 * This is used to look up the divisor speeds and the timeouts
744 * We're normally limited to 15 distinct baud rates. The extra
745 * are accessed via settings in info->flags.
746 * 0, 1, 2, 3, 4, 5, 6, 7, 8, 9,
747 * 10, 11, 12, 13, 14, 15, 16, 17, 18, 19,
748 * HI VHI
749 * 20
750 */
751static int baud_table[] = {
752 0, 50, 75, 110, 134, 150, 200, 300, 600, 1200,
753 1800, 2400, 4800, 9600, 19200, 38400, 57600, 76800, 115200, 150000,
754 230400, 0
755};
756
757static char baud_co_25[] = { /* 25 MHz clock option table */
758 /* value => 00 01 02 03 04 */
759 /* divide by 8 32 128 512 2048 */
760 0x00, 0x04, 0x04, 0x04, 0x04, 0x04, 0x03, 0x03, 0x03, 0x02,
761 0x02, 0x02, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
762};
763
764static char baud_bpr_25[] = { /* 25 MHz baud rate period table */
765 0x00, 0xf5, 0xa3, 0x6f, 0x5c, 0x51, 0xf5, 0xa3, 0x51, 0xa3,
766 0x6d, 0x51, 0xa3, 0x51, 0xa3, 0x51, 0x36, 0x29, 0x1b, 0x15
767};
768
769static char baud_co_60[] = { /* 60 MHz clock option table (CD1400 J) */
770 /* value => 00 01 02 03 04 */
771 /* divide by 8 32 128 512 2048 */
772 0x00, 0x00, 0x00, 0x04, 0x04, 0x04, 0x04, 0x04, 0x03, 0x03,
773 0x03, 0x02, 0x02, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00,
774 0x00
775};
776
777static char baud_bpr_60[] = { /* 60 MHz baud rate period table (CD1400 J) */
778 0x00, 0x82, 0x21, 0xff, 0xdb, 0xc3, 0x92, 0x62, 0xc3, 0x62,
779 0x41, 0xc3, 0x62, 0xc3, 0x62, 0xc3, 0x82, 0x62, 0x41, 0x32,
780 0x21
781};
782
783static char baud_cor3[] = { /* receive threshold */
784 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a,
785 0x0a, 0x0a, 0x0a, 0x09, 0x09, 0x08, 0x08, 0x08, 0x08, 0x07,
786 0x07
787};
788
789/*
790 * The Cyclades driver implements HW flow control as any serial driver.
791 * The cyclades_port structure member rflow and the vector rflow_thr
792 * allows us to take advantage of a special feature in the CD1400 to avoid
793 * data loss even when the system interrupt latency is too high. These flags
794 * are to be used only with very special applications. Setting these flags
795 * requires the use of a special cable (DTR and RTS reversed). In the new
796 * CD1400-based boards (rev. 6.00 or later), there is no need for special
797 * cables.
798 */
799
800static char rflow_thr[] = { /* rflow threshold */
801 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
802 0x00, 0x00, 0x00, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a,
803 0x0a
804};
805
806/* The Cyclom-Ye has placed the sequential chips in non-sequential
807 * address order. This look-up table overcomes that problem.
808 */
809static int cy_chip_offset[] = { 0x0000,
810 0x0400,
811 0x0800,
812 0x0C00,
813 0x0200,
814 0x0600,
815 0x0A00,
816 0x0E00
817};
818
819/* PCI related definitions */
820
821#ifdef CONFIG_PCI
822static struct pci_device_id cy_pci_dev_id[] __devinitdata = {
823 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Y_Lo) }, /* PCI < 1Mb */
824 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Y_Hi) }, /* PCI > 1Mb */
825 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_4Y_Lo) }, /* 4Y PCI < 1Mb */
826 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_4Y_Hi) }, /* 4Y PCI > 1Mb */
827 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_8Y_Lo) }, /* 8Y PCI < 1Mb */
828 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_8Y_Hi) }, /* 8Y PCI > 1Mb */
829 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Z_Lo) }, /* Z PCI < 1Mb */
830 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Z_Hi) }, /* Z PCI > 1Mb */
831 { } /* end of table */
832};
833MODULE_DEVICE_TABLE(pci, cy_pci_dev_id);
834#endif
835
836static void cy_start(struct tty_struct *);
837static void set_line_char(struct cyclades_port *);
838static int cyz_issue_cmd(struct cyclades_card *, __u32, __u8, __u32);
839#ifdef CONFIG_ISA
840static unsigned detect_isa_irq(void __iomem *);
841#endif /* CONFIG_ISA */
842
843static int cyclades_get_proc_info(char *, char **, off_t, int, int *, void *);
844
845#ifndef CONFIG_CYZ_INTR
846static void cyz_poll(unsigned long);
847
848/* The Cyclades-Z polling cycle is defined by this variable */
849static long cyz_polling_cycle = CZ_DEF_POLL;
850
851static DEFINE_TIMER(cyz_timerlist, cyz_poll, 0, 0);
852
853#else /* CONFIG_CYZ_INTR */
854static void cyz_rx_restart(unsigned long);
855static struct timer_list cyz_rx_full_timer[NR_PORTS];
856#endif /* CONFIG_CYZ_INTR */
857
858static inline int serial_paranoia_check(struct cyclades_port *info,
859 char *name, const char *routine)
860{
861#ifdef SERIAL_PARANOIA_CHECK
862 if (!info) {
863 printk(KERN_WARNING "cyc Warning: null cyclades_port for (%s) "
864 "in %s\n", name, routine);
865 return 1;
866 }
867
868 if ((long)info < (long)(&cy_port[0]) ||
869 (long)(&cy_port[NR_PORTS]) < (long)info) {
870 printk(KERN_WARNING "cyc Warning: cyclades_port out of range "
871 "for (%s) in %s\n", name, routine);
872 return 1;
873 }
874
875 if (info->magic != CYCLADES_MAGIC) {
876 printk(KERN_WARNING "cyc Warning: bad magic number for serial "
877 "struct (%s) in %s\n", name, routine);
878 return 1;
879 }
880#endif
881 return 0;
882} /* serial_paranoia_check */
883
884/*
885 * This routine is used by the interrupt handler to schedule
886 * processing in the software interrupt portion of the driver
887 * (also known as the "bottom half"). This can be called any
888 * number of times for any channel without harm.
889 */
890static inline void cy_sched_event(struct cyclades_port *info, int event)
891{
892 info->event |= 1 << event; /* remember what kind of event and who */
893 schedule_work(&info->tqueue);
894} /* cy_sched_event */
895
896/*
897 * This routine is used to handle the "bottom half" processing for the
898 * serial driver, known also the "software interrupt" processing.
899 * This processing is done at the kernel interrupt level, after the
900 * cy#/_interrupt() has returned, BUT WITH INTERRUPTS TURNED ON. This
901 * is where time-consuming activities which can not be done in the
902 * interrupt driver proper are done; the interrupt driver schedules
903 * them using cy_sched_event(), and they get done here.
904 *
905 * This is done through one level of indirection--the task queue.
906 * When a hardware interrupt service routine wants service by the
907 * driver's bottom half, it enqueues the appropriate tq_struct (one
908 * per port) to the keventd work queue and sets a request flag
909 * that the work queue be processed.
910 *
911 * Although this may seem unwieldy, it gives the system a way to
912 * pass an argument (in this case the pointer to the cyclades_port
913 * structure) to the bottom half of the driver. Previous kernels
914 * had to poll every port to see if that port needed servicing.
915 */
916static void
917do_softint(struct work_struct *work)
918{
919 struct cyclades_port *info =
920 container_of(work, struct cyclades_port, tqueue);
921 struct tty_struct *tty;
922
923 tty = info->tty;
924 if (!tty)
925 return;
926
927 if (test_and_clear_bit(Cy_EVENT_HANGUP, &info->event)) {
928 tty_hangup(info->tty);
929 wake_up_interruptible(&info->open_wait);
930 info->flags &= ~ASYNC_NORMAL_ACTIVE;
931 }
932 if (test_and_clear_bit(Cy_EVENT_OPEN_WAKEUP, &info->event))
933 wake_up_interruptible(&info->open_wait);
934#ifdef CONFIG_CYZ_INTR
935 if (test_and_clear_bit(Cy_EVENT_Z_RX_FULL, &info->event)) {
936 if (cyz_rx_full_timer[info->line].function == NULL) {
937 cyz_rx_full_timer[info->line].expires = jiffies + 1;
938 cyz_rx_full_timer[info->line].function = cyz_rx_restart;
939 cyz_rx_full_timer[info->line].data =
940 (unsigned long)info;
941 add_timer(&cyz_rx_full_timer[info->line]);
942 }
943 }
944#endif
945 if (test_and_clear_bit(Cy_EVENT_DELTA_WAKEUP, &info->event))
946 wake_up_interruptible(&info->delta_msr_wait);
947 tty_wakeup(tty);
948#ifdef Z_WAKE
949 if (test_and_clear_bit(Cy_EVENT_SHUTDOWN_WAKEUP, &info->event))
950 complete(&info->shutdown_wait);
951#endif
952} /* do_softint */
953
954
955/***********************************************************/
956/********* Start of block of Cyclom-Y specific code ********/
957
958/* This routine waits up to 1000 micro-seconds for the previous
959 command to the Cirrus chip to complete and then issues the
960 new command. An error is returned if the previous command
961 didn't finish within the time limit.
962
963 This function is only called from inside spinlock-protected code.
964 */
965static int cyy_issue_cmd(void __iomem * base_addr, u_char cmd, int index)
966{
967 unsigned int i;
968
969 /* Check to see that the previous command has completed */
970 for (i = 0; i < 100; i++) {
971 if (readb(base_addr + (CyCCR << index)) == 0) {
972 break;
973 }
974 udelay(10L);
975 }
976 /* if the CCR never cleared, the previous command
977 didn't finish within the "reasonable time" */
978 if (i == 100)
979 return -1;
980
981 /* Issue the new command */
982 cy_writeb(base_addr + (CyCCR << index), cmd);
983
984 return 0;
985} /* cyy_issue_cmd */
986
987#ifdef CONFIG_ISA
988/* ISA interrupt detection code */
989static unsigned detect_isa_irq(void __iomem * address)
990{
991 int irq;
992 unsigned long irqs, flags;
993 int save_xir, save_car;
994 int index = 0; /* IRQ probing is only for ISA */
995
996 /* forget possible initially masked and pending IRQ */
997 irq = probe_irq_off(probe_irq_on());
998
999 /* Clear interrupts on the board first */
1000 cy_writeb(address + (Cy_ClrIntr << index), 0);
1001 /* Cy_ClrIntr is 0x1800 */
1002
1003 irqs = probe_irq_on();
1004 /* Wait ... */
1005 udelay(5000L);
1006
1007 /* Enable the Tx interrupts on the CD1400 */
1008 local_irq_save(flags);
1009 cy_writeb(address + (CyCAR << index), 0);
1010 cyy_issue_cmd(address, CyCHAN_CTL | CyENB_XMTR, index);
1011
1012 cy_writeb(address + (CyCAR << index), 0);
1013 cy_writeb(address + (CySRER << index),
1014 readb(address + (CySRER << index)) | CyTxRdy);
1015 local_irq_restore(flags);
1016
1017 /* Wait ... */
1018 udelay(5000L);
1019
1020 /* Check which interrupt is in use */
1021 irq = probe_irq_off(irqs);
1022
1023 /* Clean up */
1024 save_xir = (u_char) readb(address + (CyTIR << index));
1025 save_car = readb(address + (CyCAR << index));
1026 cy_writeb(address + (CyCAR << index), (save_xir & 0x3));
1027 cy_writeb(address + (CySRER << index),
1028 readb(address + (CySRER << index)) & ~CyTxRdy);
1029 cy_writeb(address + (CyTIR << index), (save_xir & 0x3f));
1030 cy_writeb(address + (CyCAR << index), (save_car));
1031 cy_writeb(address + (Cy_ClrIntr << index), 0);
1032 /* Cy_ClrIntr is 0x1800 */
1033
1034 return (irq > 0) ? irq : 0;
1035}
1036#endif /* CONFIG_ISA */
1037
1038static void cyy_intr_chip(struct cyclades_card *cinfo, int chip,
1039 void __iomem * base_addr, int status, int index)
1040{
1041 struct cyclades_port *info;
1042 struct tty_struct *tty;
1043 int char_count;
1044 int i, j, len, mdm_change, mdm_status, outch;
1045 int save_xir, channel, save_car;
1046 char data;
1047
1048 if (status & CySRReceive) { /* reception interrupt */
1049#ifdef CY_DEBUG_INTERRUPTS
1050 printk(KERN_DEBUG "cyy_interrupt: rcvd intr, chip %d\n", chip);
1051#endif
1052 /* determine the channel & change to that context */
1053 spin_lock(&cinfo->card_lock);
1054 save_xir = (u_char) readb(base_addr + (CyRIR << index));
1055 channel = (u_short) (save_xir & CyIRChannel);
1056 i = channel + chip * 4 + cinfo->first_line;
1057 info = &cy_port[i];
1058 info->last_active = jiffies;
1059 save_car = readb(base_addr + (CyCAR << index));
1060 cy_writeb(base_addr + (CyCAR << index), save_xir);
1061
1062 /* if there is nowhere to put the data, discard it */
1063 if (info->tty == 0) {
1064 j = (readb(base_addr + (CyRIVR << index)) &
1065 CyIVRMask);
1066 if (j == CyIVRRxEx) { /* exception */
1067 data = readb(base_addr + (CyRDSR << index));
1068 } else { /* normal character reception */
1069 char_count = readb(base_addr +
1070 (CyRDCR << index));
1071 while (char_count--) {
1072 data = readb(base_addr +
1073 (CyRDSR << index));
1074 }
1075 }
1076 } else { /* there is an open port for this data */
1077 tty = info->tty;
1078 j = (readb(base_addr + (CyRIVR << index)) &
1079 CyIVRMask);
1080 if (j == CyIVRRxEx) { /* exception */
1081 data = readb(base_addr + (CyRDSR << index));
1082
1083 /* For statistics only */
1084 if (data & CyBREAK)
1085 info->icount.brk++;
1086 else if (data & CyFRAME)
1087 info->icount.frame++;
1088 else if (data & CyPARITY)
1089 info->icount.parity++;
1090 else if (data & CyOVERRUN)
1091 info->icount.overrun++;
1092
1093 if (data & info->ignore_status_mask) {
1094 info->icount.rx++;
1095 return;
1096 }
1097 if (tty_buffer_request_room(tty, 1)) {
1098 if (data & info->read_status_mask) {
1099 if (data & CyBREAK) {
1100 tty_insert_flip_char(
1101 tty,
1102 readb(
1103 base_addr +
1104 (CyRDSR <<
1105 index)),
1106 TTY_BREAK);
1107 info->icount.rx++;
1108 if (info->flags &
1109 ASYNC_SAK) {
1110 do_SAK(tty);
1111 }
1112 } else if (data & CyFRAME) {
1113 tty_insert_flip_char(
1114 tty,
1115 readb(
1116 base_addr +
1117 (CyRDSR <<
1118 index)),
1119 TTY_FRAME);
1120 info->icount.rx++;
1121 info->idle_stats.
1122 frame_errs++;
1123 } else if (data & CyPARITY) {
1124 /* Pieces of seven... */
1125 tty_insert_flip_char(
1126 tty,
1127 readb(
1128 base_addr +
1129 (CyRDSR <<
1130 index)),
1131 TTY_PARITY);
1132 info->icount.rx++;
1133 info->idle_stats.
1134 parity_errs++;
1135 } else if (data & CyOVERRUN) {
1136 tty_insert_flip_char(
1137 tty, 0,
1138 TTY_OVERRUN);
1139 info->icount.rx++;
1140 /* If the flip buffer itself is
1141 overflowing, we still lose
1142 the next incoming character.
1143 */
1144 tty_insert_flip_char(
1145 tty,
1146 readb(
1147 base_addr +
1148 (CyRDSR <<
1149 index)),
1150 TTY_FRAME);
1151 info->icount.rx++;
1152 info->idle_stats.
1153 overruns++;
1154 /* These two conditions may imply */
1155 /* a normal read should be done. */
1156 /* }else if(data & CyTIMEOUT){ */
1157 /* }else if(data & CySPECHAR){ */
1158 } else {
1159 tty_insert_flip_char(
1160 tty, 0,
1161 TTY_NORMAL);
1162 info->icount.rx++;
1163 }
1164 } else {
1165 tty_insert_flip_char(tty, 0,
1166 TTY_NORMAL);
1167 info->icount.rx++;
1168 }
1169 } else {
1170 /* there was a software buffer
1171 overrun and nothing could be
1172 done about it!!! */
1173 info->icount.buf_overrun++;
1174 info->idle_stats.overruns++;
1175 }
1176 } else { /* normal character reception */
1177 /* load # chars available from the chip */
1178 char_count = readb(base_addr +
1179 (CyRDCR << index));
1180
1181#ifdef CY_ENABLE_MONITORING
1182 ++info->mon.int_count;
1183 info->mon.char_count += char_count;
1184 if (char_count > info->mon.char_max)
1185 info->mon.char_max = char_count;
1186 info->mon.char_last = char_count;
1187#endif
1188 len = tty_buffer_request_room(tty, char_count);
1189 while (len--) {
1190 data = readb(base_addr +
1191 (CyRDSR << index));
1192 tty_insert_flip_char(tty, data,
1193 TTY_NORMAL);
1194 info->idle_stats.recv_bytes++;
1195 info->icount.rx++;
1196#ifdef CY_16Y_HACK
1197 udelay(10L);
1198#endif
1199 }
1200 info->idle_stats.recv_idle = jiffies;
1201 }
1202 tty_schedule_flip(tty);
1203 }
1204 /* end of service */
1205 cy_writeb(base_addr + (CyRIR << index), (save_xir & 0x3f));
1206 cy_writeb(base_addr + (CyCAR << index), (save_car));
1207 spin_unlock(&cinfo->card_lock);
1208 }
1209
1210 if (status & CySRTransmit) { /* transmission interrupt */
1211 /* Since we only get here when the transmit buffer
1212 is empty, we know we can always stuff a dozen
1213 characters. */
1214#ifdef CY_DEBUG_INTERRUPTS
1215 printk(KERN_DEBUG "cyy_interrupt: xmit intr, chip %d\n", chip);
1216#endif
1217
1218 /* determine the channel & change to that context */
1219 spin_lock(&cinfo->card_lock);
1220 save_xir = (u_char) readb(base_addr + (CyTIR << index));
1221 channel = (u_short) (save_xir & CyIRChannel);
1222 i = channel + chip * 4 + cinfo->first_line;
1223 save_car = readb(base_addr + (CyCAR << index));
1224 cy_writeb(base_addr + (CyCAR << index), save_xir);
1225
1226 /* validate the port# (as configured and open) */
1227 if ((i < 0) || (NR_PORTS <= i)) {
1228 cy_writeb(base_addr + (CySRER << index),
1229 readb(base_addr + (CySRER << index)) &
1230 ~CyTxRdy);
1231 goto txend;
1232 }
1233 info = &cy_port[i];
1234 info->last_active = jiffies;
1235 if (info->tty == 0) {
1236 cy_writeb(base_addr + (CySRER << index),
1237 readb(base_addr + (CySRER << index)) &
1238 ~CyTxRdy);
1239 goto txdone;
1240 }
1241
1242 /* load the on-chip space for outbound data */
1243 char_count = info->xmit_fifo_size;
1244
1245 if (info->x_char) { /* send special char */
1246 outch = info->x_char;
1247 cy_writeb(base_addr + (CyTDR << index), outch);
1248 char_count--;
1249 info->icount.tx++;
1250 info->x_char = 0;
1251 }
1252
1253 if (info->breakon || info->breakoff) {
1254 if (info->breakon) {
1255 cy_writeb(base_addr + (CyTDR << index), 0);
1256 cy_writeb(base_addr + (CyTDR << index), 0x81);
1257 info->breakon = 0;
1258 char_count -= 2;
1259 }
1260 if (info->breakoff) {
1261 cy_writeb(base_addr + (CyTDR << index), 0);
1262 cy_writeb(base_addr + (CyTDR << index), 0x83);
1263 info->breakoff = 0;
1264 char_count -= 2;
1265 }
1266 }
1267
1268 while (char_count-- > 0) {
1269 if (!info->xmit_cnt) {
1270 if (readb(base_addr + (CySRER << index)) &
1271 CyTxMpty) {
1272 cy_writeb(base_addr + (CySRER << index),
1273 readb(base_addr +
1274 (CySRER << index)) &
1275 ~CyTxMpty);
1276 } else {
1277 cy_writeb(base_addr + (CySRER << index),
1278 (readb(base_addr +
1279 (CySRER << index)) &
1280 ~CyTxRdy) | CyTxMpty);
1281 }
1282 goto txdone;
1283 }
1284 if (info->xmit_buf == 0) {
1285 cy_writeb(base_addr + (CySRER << index),
1286 readb(base_addr + (CySRER << index)) &
1287 ~CyTxRdy);
1288 goto txdone;
1289 }
1290 if (info->tty->stopped || info->tty->hw_stopped) {
1291 cy_writeb(base_addr + (CySRER << index),
1292 readb(base_addr + (CySRER << index)) &
1293 ~CyTxRdy);
1294 goto txdone;
1295 }
1296 /* Because the Embedded Transmit Commands have
1297 been enabled, we must check to see if the
1298 escape character, NULL, is being sent. If it
1299 is, we must ensure that there is room for it
1300 to be doubled in the output stream. Therefore
1301 we no longer advance the pointer when the
1302 character is fetched, but rather wait until
1303 after the check for a NULL output character.
1304 This is necessary because there may not be
1305 room for the two chars needed to send a NULL.)
1306 */
1307 outch = info->xmit_buf[info->xmit_tail];
1308 if (outch) {
1309 info->xmit_cnt--;
1310 info->xmit_tail = (info->xmit_tail + 1) &
1311 (SERIAL_XMIT_SIZE - 1);
1312 cy_writeb(base_addr + (CyTDR << index), outch);
1313 info->icount.tx++;
1314 } else {
1315 if (char_count > 1) {
1316 info->xmit_cnt--;
1317 info->xmit_tail = (info->xmit_tail + 1)&
1318 (SERIAL_XMIT_SIZE - 1);
1319 cy_writeb(base_addr + (CyTDR << index),
1320 outch);
1321 cy_writeb(base_addr + (CyTDR << index),
1322 0);
1323 info->icount.tx++;
1324 char_count--;
1325 } else {
1326 }
1327 }
1328 }
1329
1330txdone:
1331 if (info->xmit_cnt < WAKEUP_CHARS) {
1332 cy_sched_event(info, Cy_EVENT_WRITE_WAKEUP);
1333 }
1334txend:
1335 /* end of service */
1336 cy_writeb(base_addr + (CyTIR << index), (save_xir & 0x3f));
1337 cy_writeb(base_addr + (CyCAR << index), (save_car));
1338 spin_unlock(&cinfo->card_lock);
1339 }
1340
1341 if (status & CySRModem) { /* modem interrupt */
1342
1343 /* determine the channel & change to that context */
1344 spin_lock(&cinfo->card_lock);
1345 save_xir = (u_char) readb(base_addr + (CyMIR << index));
1346 channel = (u_short) (save_xir & CyIRChannel);
1347 info = &cy_port[channel + chip * 4 + cinfo->first_line];
1348 info->last_active = jiffies;
1349 save_car = readb(base_addr + (CyCAR << index));
1350 cy_writeb(base_addr + (CyCAR << index), save_xir);
1351
1352 mdm_change = readb(base_addr + (CyMISR << index));
1353 mdm_status = readb(base_addr + (CyMSVR1 << index));
1354
1355 if (info->tty == 0) { /* no place for data, ignore it */
1356 ;
1357 } else {
1358 if (mdm_change & CyANY_DELTA) {
1359 /* For statistics only */
1360 if (mdm_change & CyDCD)
1361 info->icount.dcd++;
1362 if (mdm_change & CyCTS)
1363 info->icount.cts++;
1364 if (mdm_change & CyDSR)
1365 info->icount.dsr++;
1366 if (mdm_change & CyRI)
1367 info->icount.rng++;
1368
1369 cy_sched_event(info, Cy_EVENT_DELTA_WAKEUP);
1370 }
1371
1372 if ((mdm_change & CyDCD) &&
1373 (info->flags & ASYNC_CHECK_CD)) {
1374 if (mdm_status & CyDCD) {
1375 cy_sched_event(info,
1376 Cy_EVENT_OPEN_WAKEUP);
1377 } else {
1378 cy_sched_event(info, Cy_EVENT_HANGUP);
1379 }
1380 }
1381 if ((mdm_change & CyCTS) &&
1382 (info->flags & ASYNC_CTS_FLOW)) {
1383 if (info->tty->hw_stopped) {
1384 if (mdm_status & CyCTS) {
1385 /* cy_start isn't used
1386 because... !!! */
1387 info->tty->hw_stopped = 0;
1388 cy_writeb(base_addr +
1389 (CySRER << index),
1390 readb(base_addr +
1391 (CySRER <<
1392 index))|
1393 CyTxRdy);
1394 cy_sched_event(info,
1395 Cy_EVENT_WRITE_WAKEUP);
1396 }
1397 } else {
1398 if (!(mdm_status & CyCTS)) {
1399 /* cy_stop isn't used
1400 because ... !!! */
1401 info->tty->hw_stopped = 1;
1402 cy_writeb(base_addr +
1403 (CySRER << index),
1404 readb(base_addr +
1405 (CySRER <<
1406 index)) &
1407 ~CyTxRdy);
1408 }
1409 }
1410 }
1411 if (mdm_change & CyDSR) {
1412 }
1413 if (mdm_change & CyRI) {
1414 }
1415 }
1416 /* end of service */
1417 cy_writeb(base_addr + (CyMIR << index), (save_xir & 0x3f));
1418 cy_writeb(base_addr + (CyCAR << index), save_car);
1419 spin_unlock(&cinfo->card_lock);
1420 }
1421}
1422
1423/* The real interrupt service routine is called
1424 whenever the card wants its hand held--chars
1425 received, out buffer empty, modem change, etc.
1426 */
1427static irqreturn_t cyy_interrupt(int irq, void *dev_id)
1428{
1429 int status;
1430 struct cyclades_card *cinfo;
1431 void __iomem *base_addr, *card_base_addr;
1432 int chip;
1433 int index;
1434 int too_many;
1435 int had_work;
1436
1437 if ((cinfo = (struct cyclades_card *)dev_id) == 0) {
1438#ifdef CY_DEBUG_INTERRUPTS
1439 printk(KERN_DEBUG "cyy_interrupt: spurious interrupt %d\n",irq);
1440#endif
1441 return IRQ_NONE; /* spurious interrupt */
1442 }
1443
1444 card_base_addr = cinfo->base_addr;
1445 index = cinfo->bus_index;
1446
1447 /* card was not initialized yet (e.g. DEBUG_SHIRQ) */
1448 if (unlikely(card_base_addr == NULL))
1449 return IRQ_HANDLED;
1450
1451 /* This loop checks all chips in the card. Make a note whenever
1452 _any_ chip had some work to do, as this is considered an
1453 indication that there will be more to do. Only when no chip
1454 has any work does this outermost loop exit.
1455 */
1456 do {
1457 had_work = 0;
1458 for (chip = 0; chip < cinfo->num_chips; chip++) {
1459 base_addr = cinfo->base_addr +
1460 (cy_chip_offset[chip] << index);
1461 too_many = 0;
1462 while ((status = readb(base_addr +
1463 (CySVRR << index))) != 0x00) {
1464 had_work++;
1465 /* The purpose of the following test is to ensure that
1466 no chip can monopolize the driver. This forces the
1467 chips to be checked in a round-robin fashion (after
1468 draining each of a bunch (1000) of characters).
1469 */
1470 if (1000 < too_many++) {
1471 break;
1472 }
1473 cyy_intr_chip(cinfo, chip, base_addr, status,
1474 index);
1475 }
1476 }
1477 } while (had_work);
1478
1479 /* clear interrupts */
1480 spin_lock(&cinfo->card_lock);
1481 cy_writeb(card_base_addr + (Cy_ClrIntr << index), 0);
1482 /* Cy_ClrIntr is 0x1800 */
1483 spin_unlock(&cinfo->card_lock);
1484 return IRQ_HANDLED;
1485} /* cyy_interrupt */
1486
1487/***********************************************************/
1488/********* End of block of Cyclom-Y specific code **********/
1489/******** Start of block of Cyclades-Z specific code *********/
1490/***********************************************************/
1491
1492static int
1493cyz_fetch_msg(struct cyclades_card *cinfo,
1494 __u32 * channel, __u8 * cmd, __u32 * param)
1495{
1496 struct FIRM_ID __iomem *firm_id;
1497 struct ZFW_CTRL __iomem *zfw_ctrl;
1498 struct BOARD_CTRL __iomem *board_ctrl;
1499 unsigned long loc_doorbell;
1500
1501 firm_id = cinfo->base_addr + ID_ADDRESS;
1502 if (!ISZLOADED(*cinfo)) {
1503 return -1;
1504 }
1505 zfw_ctrl = cinfo->base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
1506 board_ctrl = &zfw_ctrl->board_ctrl;
1507
1508 loc_doorbell = readl(&((struct RUNTIME_9060 __iomem *)
1509 (cinfo->ctl_addr))->loc_doorbell);
1510 if (loc_doorbell) {
1511 *cmd = (char)(0xff & loc_doorbell);
1512 *channel = readl(&board_ctrl->fwcmd_channel);
1513 *param = (__u32) readl(&board_ctrl->fwcmd_param);
1514 cy_writel(&((struct RUNTIME_9060 __iomem *)(cinfo->ctl_addr))->
1515 loc_doorbell, 0xffffffff);
1516 return 1;
1517 }
1518 return 0;
1519} /* cyz_fetch_msg */
1520
1521static int
1522cyz_issue_cmd(struct cyclades_card *cinfo,
1523 __u32 channel, __u8 cmd, __u32 param)
1524{
1525 struct FIRM_ID __iomem *firm_id;
1526 struct ZFW_CTRL __iomem *zfw_ctrl;
1527 struct BOARD_CTRL __iomem *board_ctrl;
1528 __u32 __iomem *pci_doorbell;
1529 int index;
1530
1531 firm_id = cinfo->base_addr + ID_ADDRESS;
1532 if (!ISZLOADED(*cinfo)) {
1533 return -1;
1534 }
1535 zfw_ctrl = cinfo->base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
1536 board_ctrl = &zfw_ctrl->board_ctrl;
1537
1538 index = 0;
1539 pci_doorbell =
1540 &((struct RUNTIME_9060 __iomem *)(cinfo->ctl_addr))->pci_doorbell;
1541 while ((readl(pci_doorbell) & 0xff) != 0) {
1542 if (index++ == 1000) {
1543 return (int)(readl(pci_doorbell) & 0xff);
1544 }
1545 udelay(50L);
1546 }
1547 cy_writel(&board_ctrl->hcmd_channel, channel);
1548 cy_writel(&board_ctrl->hcmd_param, param);
1549 cy_writel(pci_doorbell, (long)cmd);
1550
1551 return 0;
1552} /* cyz_issue_cmd */
1553
1554static void
1555cyz_handle_rx(struct cyclades_port *info, struct CH_CTRL __iomem *ch_ctrl,
1556 struct BUF_CTRL __iomem *buf_ctrl)
1557{
1558 struct cyclades_card *cinfo = info->card;
1559 struct tty_struct *tty = info->tty;
1560 int char_count;
1561 int len;
1562#ifdef BLOCKMOVE
1563 unsigned char *buf;
1564#else
1565 char data;
1566#endif
1567 __u32 rx_put, rx_get, new_rx_get, rx_bufsize, rx_bufaddr;
1568
1569 rx_get = new_rx_get = readl(&buf_ctrl->rx_get);
1570 rx_put = readl(&buf_ctrl->rx_put);
1571 rx_bufsize = readl(&buf_ctrl->rx_bufsize);
1572 rx_bufaddr = readl(&buf_ctrl->rx_bufaddr);
1573 if (rx_put >= rx_get)
1574 char_count = rx_put - rx_get;
1575 else
1576 char_count = rx_put - rx_get + rx_bufsize;
1577
1578 if (char_count) {
1579 info->last_active = jiffies;
1580 info->jiffies[1] = jiffies;
1581
1582#ifdef CY_ENABLE_MONITORING
1583 info->mon.int_count++;
1584 info->mon.char_count += char_count;
1585 if (char_count > info->mon.char_max)
1586 info->mon.char_max = char_count;
1587 info->mon.char_last = char_count;
1588#endif
1589 if (tty == 0) {
1590 /* flush received characters */
1591 new_rx_get = (new_rx_get + char_count) &
1592 (rx_bufsize - 1);
1593 info->rflush_count++;
1594 } else {
1595#ifdef BLOCKMOVE
1596 /* we'd like to use memcpy(t, f, n) and memset(s, c, count)
1597 for performance, but because of buffer boundaries, there
1598 may be several steps to the operation */
1599 while (1) {
1600 len = tty_prepare_flip_string(tty, &buf,
1601 char_count);
1602 if (!len)
1603 break;
1604
1605 len = min_t(unsigned int, min(len, char_count),
1606 rx_bufsize - new_rx_get);
1607
1608 memcpy_fromio(buf, cinfo->base_addr +
1609 rx_bufaddr + new_rx_get, len);
1610
1611 new_rx_get = (new_rx_get + len) &
1612 (rx_bufsize - 1);
1613 char_count -= len;
1614 info->icount.rx += len;
1615 info->idle_stats.recv_bytes += len;
1616 }
1617#else
1618 len = tty_buffer_request_room(tty, char_count);
1619 while (len--) {
1620 data = readb(cinfo->base_addr + rx_bufaddr +
1621 new_rx_get);
1622 new_rx_get = (new_rx_get + 1)& (rx_bufsize - 1);
1623 tty_insert_flip_char(tty, data, TTY_NORMAL);
1624 info->idle_stats.recv_bytes++;
1625 info->icount.rx++;
1626 }
1627#endif
1628#ifdef CONFIG_CYZ_INTR
1629 /* Recalculate the number of chars in the RX buffer and issue
1630 a cmd in case it's higher than the RX high water mark */
1631 rx_put = readl(&buf_ctrl->rx_put);
1632 if (rx_put >= rx_get)
1633 char_count = rx_put - rx_get;
1634 else
1635 char_count = rx_put - rx_get + rx_bufsize;
1636 if (char_count >= (int)readl(&buf_ctrl->rx_threshold)) {
1637 cy_sched_event(info, Cy_EVENT_Z_RX_FULL);
1638 }
1639#endif
1640 info->idle_stats.recv_idle = jiffies;
1641 tty_schedule_flip(tty);
1642 }
1643 /* Update rx_get */
1644 cy_writel(&buf_ctrl->rx_get, new_rx_get);
1645 }
1646}
1647
1648static void
1649cyz_handle_tx(struct cyclades_port *info, struct CH_CTRL __iomem *ch_ctrl,
1650 struct BUF_CTRL __iomem *buf_ctrl)
1651{
1652 struct cyclades_card *cinfo = info->card;
1653 struct tty_struct *tty = info->tty;
1654 char data;
1655 int char_count;
1656#ifdef BLOCKMOVE
1657 int small_count;
1658#endif
1659 __u32 tx_put, tx_get, tx_bufsize, tx_bufaddr;
1660
1661 if (info->xmit_cnt <= 0) /* Nothing to transmit */
1662 return;
1663
1664 tx_get = readl(&buf_ctrl->tx_get);
1665 tx_put = readl(&buf_ctrl->tx_put);
1666 tx_bufsize = readl(&buf_ctrl->tx_bufsize);
1667 tx_bufaddr = readl(&buf_ctrl->tx_bufaddr);
1668 if (tx_put >= tx_get)
1669 char_count = tx_get - tx_put - 1 + tx_bufsize;
1670 else
1671 char_count = tx_get - tx_put - 1;
1672
1673 if (char_count) {
1674
1675 if (tty == 0) {
1676 goto ztxdone;
1677 }
1678
1679 if (info->x_char) { /* send special char */
1680 data = info->x_char;
1681
1682 cy_writeb(cinfo->base_addr + tx_bufaddr + tx_put, data);
1683 tx_put = (tx_put + 1) & (tx_bufsize - 1);
1684 info->x_char = 0;
1685 char_count--;
1686 info->icount.tx++;
1687 info->last_active = jiffies;
1688 info->jiffies[2] = jiffies;
1689 }
1690#ifdef BLOCKMOVE
1691 while (0 < (small_count = min_t(unsigned int,
1692 tx_bufsize - tx_put, min_t(unsigned int,
1693 (SERIAL_XMIT_SIZE - info->xmit_tail),
1694 min_t(unsigned int, info->xmit_cnt,
1695 char_count))))) {
1696
1697 memcpy_toio((char *)(cinfo->base_addr + tx_bufaddr +
1698 tx_put),
1699 &info->xmit_buf[info->xmit_tail],
1700 small_count);
1701
1702 tx_put = (tx_put + small_count) & (tx_bufsize - 1);
1703 char_count -= small_count;
1704 info->icount.tx += small_count;
1705 info->xmit_cnt -= small_count;
1706 info->xmit_tail = (info->xmit_tail + small_count) &
1707 (SERIAL_XMIT_SIZE - 1);
1708 info->last_active = jiffies;
1709 info->jiffies[2] = jiffies;
1710 }
1711#else
1712 while (info->xmit_cnt && char_count) {
1713 data = info->xmit_buf[info->xmit_tail];
1714 info->xmit_cnt--;
1715 info->xmit_tail = (info->xmit_tail + 1) &
1716 (SERIAL_XMIT_SIZE - 1);
1717
1718 cy_writeb(cinfo->base_addr + tx_bufaddr + tx_put, data);
1719 tx_put = (tx_put + 1) & (tx_bufsize - 1);
1720 char_count--;
1721 info->icount.tx++;
1722 info->last_active = jiffies;
1723 info->jiffies[2] = jiffies;
1724 }
1725#endif
1726ztxdone:
1727 if (info->xmit_cnt < WAKEUP_CHARS) {
1728 cy_sched_event(info, Cy_EVENT_WRITE_WAKEUP);
1729 }
1730 /* Update tx_put */
1731 cy_writel(&buf_ctrl->tx_put, tx_put);
1732 }
1733}
1734
1735static void cyz_handle_cmd(struct cyclades_card *cinfo)
1736{
1737 struct tty_struct *tty;
1738 struct cyclades_port *info;
1739 static struct FIRM_ID __iomem *firm_id;
1740 static struct ZFW_CTRL __iomem *zfw_ctrl;
1741 static struct BOARD_CTRL __iomem *board_ctrl;
1742 static struct CH_CTRL __iomem *ch_ctrl;
1743 static struct BUF_CTRL __iomem *buf_ctrl;
1744 __u32 channel;
1745 __u8 cmd;
1746 __u32 param;
1747 __u32 hw_ver, fw_ver;
1748 int special_count;
1749 int delta_count;
1750
1751 firm_id = cinfo->base_addr + ID_ADDRESS;
1752 zfw_ctrl = cinfo->base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
1753 board_ctrl = &zfw_ctrl->board_ctrl;
1754 fw_ver = readl(&board_ctrl->fw_version);
1755 hw_ver = readl(&((struct RUNTIME_9060 __iomem *)(cinfo->ctl_addr))->
1756 mail_box_0);
1757
1758 while (cyz_fetch_msg(cinfo, &channel, &cmd, &param) == 1) {
1759 special_count = 0;
1760 delta_count = 0;
1761 info = &cy_port[channel + cinfo->first_line];
1762 if ((tty = info->tty) == 0) {
1763 continue;
1764 }
1765 ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]);
1766 buf_ctrl = &(zfw_ctrl->buf_ctrl[channel]);
1767
1768 switch (cmd) {
1769 case C_CM_PR_ERROR:
1770 tty_insert_flip_char(tty, 0, TTY_PARITY);
1771 info->icount.rx++;
1772 special_count++;
1773 break;
1774 case C_CM_FR_ERROR:
1775 tty_insert_flip_char(tty, 0, TTY_FRAME);
1776 info->icount.rx++;
1777 special_count++;
1778 break;
1779 case C_CM_RXBRK:
1780 tty_insert_flip_char(tty, 0, TTY_BREAK);
1781 info->icount.rx++;
1782 special_count++;
1783 break;
1784 case C_CM_MDCD:
1785 info->icount.dcd++;
1786 delta_count++;
1787 if (info->flags & ASYNC_CHECK_CD) {
1788 if ((fw_ver > 241 ? ((u_long) param) :
1789 readl(&ch_ctrl->rs_status)) &
1790 C_RS_DCD) {
1791 cy_sched_event(info,
1792 Cy_EVENT_OPEN_WAKEUP);
1793 } else {
1794 cy_sched_event(info, Cy_EVENT_HANGUP);
1795 }
1796 }
1797 break;
1798 case C_CM_MCTS:
1799 info->icount.cts++;
1800 delta_count++;
1801 break;
1802 case C_CM_MRI:
1803 info->icount.rng++;
1804 delta_count++;
1805 break;
1806 case C_CM_MDSR:
1807 info->icount.dsr++;
1808 delta_count++;
1809 break;
1810#ifdef Z_WAKE
1811 case C_CM_IOCTLW:
1812 cy_sched_event(info, Cy_EVENT_SHUTDOWN_WAKEUP);
1813 break;
1814#endif
1815#ifdef CONFIG_CYZ_INTR
1816 case C_CM_RXHIWM:
1817 case C_CM_RXNNDT:
1818 case C_CM_INTBACK2:
1819 /* Reception Interrupt */
1820#ifdef CY_DEBUG_INTERRUPTS
1821 printk(KERN_DEBUG "cyz_interrupt: rcvd intr, card %d, "
1822 "port %ld\n", info->card, channel);
1823#endif
1824 cyz_handle_rx(info, ch_ctrl, buf_ctrl);
1825 break;
1826 case C_CM_TXBEMPTY:
1827 case C_CM_TXLOWWM:
1828 case C_CM_INTBACK:
1829 /* Transmission Interrupt */
1830#ifdef CY_DEBUG_INTERRUPTS
1831 printk(KERN_DEBUG "cyz_interrupt: xmit intr, card %d, "
1832 "port %ld\n", info->card, channel);
1833#endif
1834 cyz_handle_tx(info, ch_ctrl, buf_ctrl);
1835 break;
1836#endif /* CONFIG_CYZ_INTR */
1837 case C_CM_FATAL:
1838 /* should do something with this !!! */
1839 break;
1840 default:
1841 break;
1842 }
1843 if (delta_count)
1844 cy_sched_event(info, Cy_EVENT_DELTA_WAKEUP);
1845 if (special_count)
1846 tty_schedule_flip(tty);
1847 }
1848}
1849
1850#ifdef CONFIG_CYZ_INTR
1851static irqreturn_t cyz_interrupt(int irq, void *dev_id)
1852{
1853 struct cyclades_card *cinfo;
1854
1855 if ((cinfo = (struct cyclades_card *)dev_id) == 0) {
1856#ifdef CY_DEBUG_INTERRUPTS
1857 printk(KERN_DEBUG "cyz_interrupt: spurious interrupt %d\n",irq);
1858#endif
1859 return IRQ_NONE; /* spurious interrupt */
1860 }
1861
1862 if (!ISZLOADED(*cinfo)) {
1863#ifdef CY_DEBUG_INTERRUPTS
1864 printk(KERN_DEBUG "cyz_interrupt: board not yet loaded "
1865 "(IRQ%d).\n", irq);
1866#endif
1867 return IRQ_NONE;
1868 }
1869
1870 /* Handle the interrupts */
1871 cyz_handle_cmd(cinfo);
1872
1873 return IRQ_HANDLED;
1874} /* cyz_interrupt */
1875
1876static void cyz_rx_restart(unsigned long arg)
1877{
1878 struct cyclades_port *info = (struct cyclades_port *)arg;
1879 struct cyclades_card *card = info->card;
1880 int retval;
1881 __u32 channel = info->line - card->first_line;
1882 unsigned long flags;
1883
1884 CY_LOCK(info, flags);
1885 retval = cyz_issue_cmd(card, channel, C_CM_INTBACK2, 0L);
1886 if (retval != 0) {
1887 printk(KERN_ERR "cyc:cyz_rx_restart retval on ttyC%d was %x\n",
1888 info->line, retval);
1889 }
1890 cyz_rx_full_timer[info->line].function = NULL;
1891 CY_UNLOCK(info, flags);
1892}
1893
1894#else /* CONFIG_CYZ_INTR */
1895
1896static void cyz_poll(unsigned long arg)
1897{
1898 struct cyclades_card *cinfo;
1899 struct cyclades_port *info;
1900 struct tty_struct *tty;
1901 static struct FIRM_ID *firm_id;
1902 static struct ZFW_CTRL *zfw_ctrl;
1903 static struct BOARD_CTRL *board_ctrl;
1904 static struct CH_CTRL *ch_ctrl;
1905 static struct BUF_CTRL *buf_ctrl;
1906 unsigned long expires = jiffies + HZ;
1907 int card, port;
1908
1909 for (card = 0; card < NR_CARDS; card++) {
1910 cinfo = &cy_card[card];
1911
1912 if (!IS_CYC_Z(*cinfo))
1913 continue;
1914 if (!ISZLOADED(*cinfo))
1915 continue;
1916
1917 firm_id = cinfo->base_addr + ID_ADDRESS;
1918 zfw_ctrl = cinfo->base_addr +
1919 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
1920 board_ctrl = &(zfw_ctrl->board_ctrl);
1921
1922 /* Skip first polling cycle to avoid racing conditions with the FW */
1923 if (!cinfo->intr_enabled) {
1924 cinfo->nports = (int)readl(&board_ctrl->n_channel);
1925 cinfo->intr_enabled = 1;
1926 continue;
1927 }
1928
1929 cyz_handle_cmd(cinfo);
1930
1931 for (port = 0; port < cinfo->nports; port++) {
1932 info = &cy_port[port + cinfo->first_line];
1933 tty = info->tty;
1934 ch_ctrl = &(zfw_ctrl->ch_ctrl[port]);
1935 buf_ctrl = &(zfw_ctrl->buf_ctrl[port]);
1936
1937 if (!info->throttle)
1938 cyz_handle_rx(info, ch_ctrl, buf_ctrl);
1939 cyz_handle_tx(info, ch_ctrl, buf_ctrl);
1940 }
1941 /* poll every 'cyz_polling_cycle' period */
1942 expires = jiffies + cyz_polling_cycle;
1943 }
1944 mod_timer(&cyz_timerlist, expires);
1945} /* cyz_poll */
1946
1947#endif /* CONFIG_CYZ_INTR */
1948
1949/********** End of block of Cyclades-Z specific code *********/
1950/***********************************************************/
1951
1952/* This is called whenever a port becomes active;
1953 interrupts are enabled and DTR & RTS are turned on.
1954 */
1955static int startup(struct cyclades_port *info)
1956{
1957 struct cyclades_card *card;
1958 unsigned long flags;
1959 int retval = 0;
1960 void __iomem *base_addr;
1961 int chip, channel, index;
1962 unsigned long page;
1963
1964 card = info->card;
1965 channel = info->line - card->first_line;
1966
1967 page = get_zeroed_page(GFP_KERNEL);
1968 if (!page)
1969 return -ENOMEM;
1970
1971 CY_LOCK(info, flags);
1972
1973 if (info->flags & ASYNC_INITIALIZED) {
1974 free_page(page);
1975 goto errout;
1976 }
1977
1978 if (!info->type) {
1979 if (info->tty) {
1980 set_bit(TTY_IO_ERROR, &info->tty->flags);
1981 }
1982 free_page(page);
1983 goto errout;
1984 }
1985
1986 if (info->xmit_buf)
1987 free_page(page);
1988 else
1989 info->xmit_buf = (unsigned char *)page;
1990
1991 CY_UNLOCK(info, flags);
1992
1993 set_line_char(info);
1994
1995 if (!IS_CYC_Z(*card)) {
1996 chip = channel >> 2;
1997 channel &= 0x03;
1998 index = card->bus_index;
1999 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
2000
2001#ifdef CY_DEBUG_OPEN
2002 printk(KERN_DEBUG "cyc startup card %d, chip %d, channel %d, "
2003 "base_addr %p\n",
2004 card, chip, channel, base_addr);
2005#endif
2006 CY_LOCK(info, flags);
2007
2008 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
2009
2010 cy_writeb(base_addr + (CyRTPR << index),
2011 (info->default_timeout ? info->default_timeout : 0x02));
2012 /* 10ms rx timeout */
2013
2014 cyy_issue_cmd(base_addr, CyCHAN_CTL | CyENB_RCVR | CyENB_XMTR,
2015 index);
2016
2017 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
2018 cy_writeb(base_addr + (CyMSVR1 << index), CyRTS);
2019 cy_writeb(base_addr + (CyMSVR2 << index), CyDTR);
2020
2021#ifdef CY_DEBUG_DTR
2022 printk(KERN_DEBUG "cyc:startup raising DTR\n");
2023 printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
2024 readb(base_addr + (CyMSVR1 << index)),
2025 readb(base_addr + (CyMSVR2 << index)));
2026#endif
2027
2028 cy_writeb(base_addr + (CySRER << index),
2029 readb(base_addr + (CySRER << index)) | CyRxData);
2030 info->flags |= ASYNC_INITIALIZED;
2031
2032 if (info->tty) {
2033 clear_bit(TTY_IO_ERROR, &info->tty->flags);
2034 }
2035 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
2036 info->breakon = info->breakoff = 0;
2037 memset((char *)&info->idle_stats, 0, sizeof(info->idle_stats));
2038 info->idle_stats.in_use =
2039 info->idle_stats.recv_idle =
2040 info->idle_stats.xmit_idle = jiffies;
2041
2042 CY_UNLOCK(info, flags);
2043
2044 } else {
2045 struct FIRM_ID __iomem *firm_id;
2046 struct ZFW_CTRL __iomem *zfw_ctrl;
2047 struct BOARD_CTRL __iomem *board_ctrl;
2048 struct CH_CTRL __iomem *ch_ctrl;
2049 int retval;
2050
2051 base_addr = card->base_addr;
2052
2053 firm_id = base_addr + ID_ADDRESS;
2054 if (!ISZLOADED(*card)) {
2055 return -ENODEV;
2056 }
2057
2058 zfw_ctrl = card->base_addr +
2059 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
2060 board_ctrl = &zfw_ctrl->board_ctrl;
2061 ch_ctrl = zfw_ctrl->ch_ctrl;
2062
2063#ifdef CY_DEBUG_OPEN
2064 printk(KERN_DEBUG "cyc startup Z card %d, channel %d, "
2065 "base_addr %p\n", card, channel, base_addr);
2066#endif
2067 CY_LOCK(info, flags);
2068
2069 cy_writel(&ch_ctrl[channel].op_mode, C_CH_ENABLE);
2070#ifdef Z_WAKE
2071#ifdef CONFIG_CYZ_INTR
2072 cy_writel(&ch_ctrl[channel].intr_enable,
2073 C_IN_TXBEMPTY | C_IN_TXLOWWM | C_IN_RXHIWM |
2074 C_IN_RXNNDT | C_IN_IOCTLW | C_IN_MDCD);
2075#else
2076 cy_writel(&ch_ctrl[channel].intr_enable,
2077 C_IN_IOCTLW | C_IN_MDCD);
2078#endif /* CONFIG_CYZ_INTR */
2079#else
2080#ifdef CONFIG_CYZ_INTR
2081 cy_writel(&ch_ctrl[channel].intr_enable,
2082 C_IN_TXBEMPTY | C_IN_TXLOWWM | C_IN_RXHIWM |
2083 C_IN_RXNNDT | C_IN_MDCD);
2084#else
2085 cy_writel(&ch_ctrl[channel].intr_enable, C_IN_MDCD);
2086#endif /* CONFIG_CYZ_INTR */
2087#endif /* Z_WAKE */
2088
2089 retval = cyz_issue_cmd(card, channel, C_CM_IOCTL, 0L);
2090 if (retval != 0) {
2091 printk(KERN_ERR "cyc:startup(1) retval on ttyC%d was "
2092 "%x\n", info->line, retval);
2093 }
2094
2095 /* Flush RX buffers before raising DTR and RTS */
2096 retval = cyz_issue_cmd(card, channel, C_CM_FLUSH_RX, 0L);
2097 if (retval != 0) {
2098 printk(KERN_ERR "cyc:startup(2) retval on ttyC%d was "
2099 "%x\n", info->line, retval);
2100 }
2101
2102 /* set timeout !!! */
2103 /* set RTS and DTR !!! */
2104 cy_writel(&ch_ctrl[channel].rs_control,
2105 readl(&ch_ctrl[channel].rs_control) | C_RS_RTS |
2106 C_RS_DTR);
2107 retval = cyz_issue_cmd(info->card, channel,
2108 C_CM_IOCTLM, 0L);
2109 if (retval != 0) {
2110 printk(KERN_ERR "cyc:startup(3) retval on ttyC%d was "
2111 "%x\n", info->line, retval);
2112 }
2113#ifdef CY_DEBUG_DTR
2114 printk(KERN_DEBUG "cyc:startup raising Z DTR\n");
2115#endif
2116
2117 /* enable send, recv, modem !!! */
2118
2119 info->flags |= ASYNC_INITIALIZED;
2120 if (info->tty) {
2121 clear_bit(TTY_IO_ERROR, &info->tty->flags);
2122 }
2123 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
2124 info->breakon = info->breakoff = 0;
2125 memset((char *)&info->idle_stats, 0, sizeof(info->idle_stats));
2126 info->idle_stats.in_use =
2127 info->idle_stats.recv_idle =
2128 info->idle_stats.xmit_idle = jiffies;
2129
2130 CY_UNLOCK(info, flags);
2131 }
2132
2133#ifdef CY_DEBUG_OPEN
2134 printk(KERN_DEBUG "cyc startup done\n");
2135#endif
2136 return 0;
2137
2138errout:
2139 CY_UNLOCK(info, flags);
2140 return retval;
2141} /* startup */
2142
2143static void start_xmit(struct cyclades_port *info)
2144{
2145 struct cyclades_card *card;
2146 unsigned long flags;
2147 void __iomem *base_addr;
2148 int chip, channel, index;
2149
2150 card = info->card;
2151 channel = info->line - card->first_line;
2152 if (!IS_CYC_Z(*card)) {
2153 chip = channel >> 2;
2154 channel &= 0x03;
2155 index = card->bus_index;
2156 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
2157
2158 CY_LOCK(info, flags);
2159 cy_writeb(base_addr + (CyCAR << index), channel);
2160 cy_writeb(base_addr + (CySRER << index),
2161 readb(base_addr + (CySRER << index)) | CyTxRdy);
2162 CY_UNLOCK(info, flags);
2163 } else {
2164#ifdef CONFIG_CYZ_INTR
2165 int retval;
2166
2167 CY_LOCK(info, flags);
2168 retval = cyz_issue_cmd(card, channel, C_CM_INTBACK, 0L);
2169 if (retval != 0) {
2170 printk(KERN_ERR "cyc:start_xmit retval on ttyC%d was "
2171 "%x\n", info->line, retval);
2172 }
2173 CY_UNLOCK(info, flags);
2174#else /* CONFIG_CYZ_INTR */
2175 /* Don't have to do anything at this time */
2176#endif /* CONFIG_CYZ_INTR */
2177 }
2178} /* start_xmit */
2179
2180/*
2181 * This routine shuts down a serial port; interrupts are disabled,
2182 * and DTR is dropped if the hangup on close termio flag is on.
2183 */
2184static void shutdown(struct cyclades_port *info)
2185{
2186 struct cyclades_card *card;
2187 unsigned long flags;
2188 void __iomem *base_addr;
2189 int chip, channel, index;
2190
2191 if (!(info->flags & ASYNC_INITIALIZED)) {
2192 return;
2193 }
2194
2195 card = info->card;
2196 channel = info->line - card->first_line;
2197 if (!IS_CYC_Z(*card)) {
2198 chip = channel >> 2;
2199 channel &= 0x03;
2200 index = card->bus_index;
2201 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
2202
2203#ifdef CY_DEBUG_OPEN
2204 printk(KERN_DEBUG "cyc shutdown Y card %d, chip %d, "
2205 "channel %d, base_addr %p\n",
2206 card, chip, channel, base_addr);
2207#endif
2208
2209 CY_LOCK(info, flags);
2210
2211 /* Clear delta_msr_wait queue to avoid mem leaks. */
2212 wake_up_interruptible(&info->delta_msr_wait);
2213
2214 if (info->xmit_buf) {
2215 unsigned char *temp;
2216 temp = info->xmit_buf;
2217 info->xmit_buf = NULL;
2218 free_page((unsigned long)temp);
2219 }
2220 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
2221 if (!info->tty || (info->tty->termios->c_cflag & HUPCL)) {
2222 cy_writeb(base_addr + (CyMSVR1 << index), ~CyRTS);
2223 cy_writeb(base_addr + (CyMSVR2 << index), ~CyDTR);
2224#ifdef CY_DEBUG_DTR
2225 printk(KERN_DEBUG "cyc shutdown dropping DTR\n");
2226 printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
2227 readb(base_addr + (CyMSVR1 << index)),
2228 readb(base_addr + (CyMSVR2 << index)));
2229#endif
2230 }
2231 cyy_issue_cmd(base_addr, CyCHAN_CTL | CyDIS_RCVR, index);
2232 /* it may be appropriate to clear _XMIT at
2233 some later date (after testing)!!! */
2234
2235 if (info->tty) {
2236 set_bit(TTY_IO_ERROR, &info->tty->flags);
2237 }
2238 info->flags &= ~ASYNC_INITIALIZED;
2239 CY_UNLOCK(info, flags);
2240 } else {
2241 struct FIRM_ID __iomem *firm_id;
2242 struct ZFW_CTRL __iomem *zfw_ctrl;
2243 struct BOARD_CTRL __iomem *board_ctrl;
2244 struct CH_CTRL __iomem *ch_ctrl;
2245 int retval;
2246
2247 base_addr = card->base_addr;
2248#ifdef CY_DEBUG_OPEN
2249 printk(KERN_DEBUG "cyc shutdown Z card %d, channel %d, "
2250 "base_addr %p\n", card, channel, base_addr);
2251#endif
2252
2253 firm_id = base_addr + ID_ADDRESS;
2254 if (!ISZLOADED(*card)) {
2255 return;
2256 }
2257
2258 zfw_ctrl = card->base_addr +
2259 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
2260 board_ctrl = &zfw_ctrl->board_ctrl;
2261 ch_ctrl = zfw_ctrl->ch_ctrl;
2262
2263 CY_LOCK(info, flags);
2264
2265 if (info->xmit_buf) {
2266 unsigned char *temp;
2267 temp = info->xmit_buf;
2268 info->xmit_buf = NULL;
2269 free_page((unsigned long)temp);
2270 }
2271
2272 if (!info->tty || (info->tty->termios->c_cflag & HUPCL)) {
2273 cy_writel(&ch_ctrl[channel].rs_control,
2274 (__u32)(readl(&ch_ctrl[channel].rs_control) &
2275 ~(C_RS_RTS | C_RS_DTR)));
2276 retval = cyz_issue_cmd(info->card, channel,
2277 C_CM_IOCTLM, 0L);
2278 if (retval != 0) {
2279 printk(KERN_ERR"cyc:shutdown retval on ttyC%d "
2280 "was %x\n", info->line, retval);
2281 }
2282#ifdef CY_DEBUG_DTR
2283 printk(KERN_DEBUG "cyc:shutdown dropping Z DTR\n");
2284#endif
2285 }
2286
2287 if (info->tty) {
2288 set_bit(TTY_IO_ERROR, &info->tty->flags);
2289 }
2290 info->flags &= ~ASYNC_INITIALIZED;
2291
2292 CY_UNLOCK(info, flags);
2293 }
2294
2295#ifdef CY_DEBUG_OPEN
2296 printk(KERN_DEBUG "cyc shutdown done\n");
2297#endif
2298} /* shutdown */
2299
2300/*
2301 * ------------------------------------------------------------
2302 * cy_open() and friends
2303 * ------------------------------------------------------------
2304 */
2305
2306static int
2307block_til_ready(struct tty_struct *tty, struct file *filp,
2308 struct cyclades_port *info)
2309{
2310 DECLARE_WAITQUEUE(wait, current);
2311 struct cyclades_card *cinfo;
2312 unsigned long flags;
2313 int chip, channel, index;
2314 int retval;
2315 void __iomem *base_addr;
2316
2317 cinfo = info->card;
2318 channel = info->line - cinfo->first_line;
2319
2320 /*
2321 * If the device is in the middle of being closed, then block
2322 * until it's done, and then try again.
2323 */
2324 if (tty_hung_up_p(filp) || (info->flags & ASYNC_CLOSING)) {
2325 wait_event_interruptible(info->close_wait,
2326 !(info->flags & ASYNC_CLOSING));
2327 return (info->flags & ASYNC_HUP_NOTIFY) ? -EAGAIN: -ERESTARTSYS;
2328 }
2329
2330 /*
2331 * If non-blocking mode is set, then make the check up front
2332 * and then exit.
2333 */
2334 if ((filp->f_flags & O_NONBLOCK) || (tty->flags & (1 << TTY_IO_ERROR))) {
2335 info->flags |= ASYNC_NORMAL_ACTIVE;
2336 return 0;
2337 }
2338
2339 /*
2340 * Block waiting for the carrier detect and the line to become
2341 * free (i.e., not in use by the callout). While we are in
2342 * this loop, info->count is dropped by one, so that
2343 * cy_close() knows when to free things. We restore it upon
2344 * exit, either normal or abnormal.
2345 */
2346 retval = 0;
2347 add_wait_queue(&info->open_wait, &wait);
2348#ifdef CY_DEBUG_OPEN
2349 printk(KERN_DEBUG "cyc block_til_ready before block: ttyC%d, "
2350 "count = %d\n", info->line, info->count);
2351#endif
2352 CY_LOCK(info, flags);
2353 if (!tty_hung_up_p(filp))
2354 info->count--;
2355 CY_UNLOCK(info, flags);
2356#ifdef CY_DEBUG_COUNT
2357 printk(KERN_DEBUG "cyc block_til_ready: (%d): decrementing count to "
2358 "%d\n", current->pid, info->count);
2359#endif
2360 info->blocked_open++;
2361
2362 if (!IS_CYC_Z(*cinfo)) {
2363 chip = channel >> 2;
2364 channel &= 0x03;
2365 index = cinfo->bus_index;
2366 base_addr = cinfo->base_addr + (cy_chip_offset[chip] << index);
2367
2368 while (1) {
2369 CY_LOCK(info, flags);
2370 if ((tty->termios->c_cflag & CBAUD)) {
2371 cy_writeb(base_addr + (CyCAR << index),
2372 (u_char) channel);
2373 cy_writeb(base_addr + (CyMSVR1 << index),
2374 CyRTS);
2375 cy_writeb(base_addr + (CyMSVR2 << index),
2376 CyDTR);
2377#ifdef CY_DEBUG_DTR
2378 printk(KERN_DEBUG "cyc:block_til_ready raising "
2379 "DTR\n");
2380 printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
2381 readb(base_addr + (CyMSVR1 << index)),
2382 readb(base_addr + (CyMSVR2 << index)));
2383#endif
2384 }
2385 CY_UNLOCK(info, flags);
2386
2387 set_current_state(TASK_INTERRUPTIBLE);
2388 if (tty_hung_up_p(filp) ||
2389 !(info->flags & ASYNC_INITIALIZED)) {
2390 retval = ((info->flags & ASYNC_HUP_NOTIFY) ?
2391 -EAGAIN : -ERESTARTSYS);
2392 break;
2393 }
2394
2395 CY_LOCK(info, flags);
2396 cy_writeb(base_addr + (CyCAR << index),
2397 (u_char) channel);
2398 if (!(info->flags & ASYNC_CLOSING) && (C_CLOCAL(tty) ||
2399 (readb(base_addr +
2400 (CyMSVR1 << index)) & CyDCD))) {
2401 CY_UNLOCK(info, flags);
2402 break;
2403 }
2404 CY_UNLOCK(info, flags);
2405
2406 if (signal_pending(current)) {
2407 retval = -ERESTARTSYS;
2408 break;
2409 }
2410#ifdef CY_DEBUG_OPEN
2411 printk(KERN_DEBUG "cyc block_til_ready blocking: "
2412 "ttyC%d, count = %d\n",
2413 info->line, info->count);
2414#endif
2415 schedule();
2416 }
2417 } else {
2418 struct FIRM_ID __iomem *firm_id;
2419 struct ZFW_CTRL __iomem *zfw_ctrl;
2420 struct BOARD_CTRL __iomem *board_ctrl;
2421 struct CH_CTRL __iomem *ch_ctrl;
2422 int retval;
2423
2424 base_addr = cinfo->base_addr;
2425 firm_id = base_addr + ID_ADDRESS;
2426 if (!ISZLOADED(*cinfo)) {
2427 __set_current_state(TASK_RUNNING);
2428 remove_wait_queue(&info->open_wait, &wait);
2429 return -EINVAL;
2430 }
2431
2432 zfw_ctrl = base_addr + (readl(&firm_id->zfwctrl_addr)& 0xfffff);
2433 board_ctrl = &zfw_ctrl->board_ctrl;
2434 ch_ctrl = zfw_ctrl->ch_ctrl;
2435
2436 while (1) {
2437 if ((tty->termios->c_cflag & CBAUD)) {
2438 cy_writel(&ch_ctrl[channel].rs_control,
2439 readl(&ch_ctrl[channel].rs_control) |
2440 C_RS_RTS | C_RS_DTR);
2441 retval = cyz_issue_cmd(info->card,
2442 channel, C_CM_IOCTLM, 0L);
2443 if (retval != 0) {
2444 printk(KERN_ERR "cyc:block_til_ready "
2445 "retval on ttyC%d was %x\n",
2446 info->line, retval);
2447 }
2448#ifdef CY_DEBUG_DTR
2449 printk(KERN_DEBUG "cyc:block_til_ready raising "
2450 "Z DTR\n");
2451#endif
2452 }
2453
2454 set_current_state(TASK_INTERRUPTIBLE);
2455 if (tty_hung_up_p(filp) ||
2456 !(info->flags & ASYNC_INITIALIZED)) {
2457 retval = ((info->flags & ASYNC_HUP_NOTIFY) ?
2458 -EAGAIN : -ERESTARTSYS);
2459 break;
2460 }
2461 if (!(info->flags & ASYNC_CLOSING) && (C_CLOCAL(tty) ||
2462 (readl(&ch_ctrl[channel].rs_status) &
2463 C_RS_DCD))) {
2464 break;
2465 }
2466 if (signal_pending(current)) {
2467 retval = -ERESTARTSYS;
2468 break;
2469 }
2470#ifdef CY_DEBUG_OPEN
2471 printk(KERN_DEBUG "cyc block_til_ready blocking: "
2472 "ttyC%d, count = %d\n",
2473 info->line, info->count);
2474#endif
2475 schedule();
2476 }
2477 }
2478 __set_current_state(TASK_RUNNING);
2479 remove_wait_queue(&info->open_wait, &wait);
2480 if (!tty_hung_up_p(filp)) {
2481 info->count++;
2482#ifdef CY_DEBUG_COUNT
2483 printk(KERN_DEBUG "cyc:block_til_ready (%d): incrementing "
2484 "count to %d\n", current->pid, info->count);
2485#endif
2486 }
2487 info->blocked_open--;
2488#ifdef CY_DEBUG_OPEN
2489 printk(KERN_DEBUG "cyc:block_til_ready after blocking: ttyC%d, "
2490 "count = %d\n", info->line, info->count);
2491#endif
2492 if (retval)
2493 return retval;
2494 info->flags |= ASYNC_NORMAL_ACTIVE;
2495 return 0;
2496} /* block_til_ready */
2497
2498/*
2499 * This routine is called whenever a serial port is opened. It
2500 * performs the serial-specific initialization for the tty structure.
2501 */
2502static int cy_open(struct tty_struct *tty, struct file *filp)
2503{
2504 struct cyclades_port *info;
2505 int retval, line;
2506
2507 line = tty->index;
2508 if ((line < 0) || (NR_PORTS <= line)) {
2509 return -ENODEV;
2510 }
2511 info = &cy_port[line];
2512 if (info->line < 0) {
2513 return -ENODEV;
2514 }
2515
2516 /* If the card's firmware hasn't been loaded,
2517 treat it as absent from the system. This
2518 will make the user pay attention.
2519 */
2520 if (IS_CYC_Z(*info->card)) {
2521 struct cyclades_card *cinfo = info->card;
2522 struct FIRM_ID __iomem *firm_id = cinfo->base_addr + ID_ADDRESS;
2523
2524 if (!ISZLOADED(*cinfo)) {
2525 if (((ZE_V1 == readl(&((struct RUNTIME_9060 __iomem *)
2526 (cinfo->ctl_addr))->mail_box_0)) &&
2527 Z_FPGA_CHECK(*cinfo)) &&
2528 (ZFIRM_HLT == readl(
2529 &firm_id->signature))) {
2530 printk(KERN_ERR "cyc:Cyclades-Z Error: you "
2531 "need an external power supply for "
2532 "this number of ports.\nFirmware "
2533 "halted.\n");
2534 } else {
2535 printk(KERN_ERR "cyc:Cyclades-Z firmware not "
2536 "yet loaded\n");
2537 }
2538 return -ENODEV;
2539 }
2540#ifdef CONFIG_CYZ_INTR
2541 else {
2542 /* In case this Z board is operating in interrupt mode, its
2543 interrupts should be enabled as soon as the first open
2544 happens to one of its ports. */
2545 if (!cinfo->intr_enabled) {
2546 struct ZFW_CTRL __iomem *zfw_ctrl;
2547 struct BOARD_CTRL __iomem *board_ctrl;
2548
2549 zfw_ctrl = cinfo->base_addr +
2550 (readl(&firm_id->zfwctrl_addr) &
2551 0xfffff);
2552
2553 board_ctrl = &zfw_ctrl->board_ctrl;
2554
2555 /* Enable interrupts on the PLX chip */
2556 cy_writew(cinfo->ctl_addr + 0x68,
2557 readw(cinfo->ctl_addr + 0x68) | 0x0900);
2558 /* Enable interrupts on the FW */
2559 retval = cyz_issue_cmd(cinfo, 0,
2560 C_CM_IRQ_ENBL, 0L);
2561 if (retval != 0) {
2562 printk(KERN_ERR "cyc:IRQ enable retval "
2563 "was %x\n", retval);
2564 }
2565 cinfo->nports =
2566 (int)readl(&board_ctrl->n_channel);
2567 cinfo->intr_enabled = 1;
2568 }
2569 }
2570#endif /* CONFIG_CYZ_INTR */
2571 /* Make sure this Z port really exists in hardware */
2572 if (info->line > (cinfo->first_line + cinfo->nports - 1))
2573 return -ENODEV;
2574 }
2575#ifdef CY_DEBUG_OTHER
2576 printk(KERN_DEBUG "cyc:cy_open ttyC%d\n", info->line);
2577#endif
2578 tty->driver_data = info;
2579 info->tty = tty;
2580 if (serial_paranoia_check(info, tty->name, "cy_open")) {
2581 return -ENODEV;
2582 }
2583#ifdef CY_DEBUG_OPEN
2584 printk(KERN_DEBUG "cyc:cy_open ttyC%d, count = %d\n", info->line,
2585 info->count);
2586#endif
2587 info->count++;
2588#ifdef CY_DEBUG_COUNT
2589 printk(KERN_DEBUG "cyc:cy_open (%d): incrementing count to %d\n",
2590 current->pid, info->count);
2591#endif
2592
2593 /*
2594 * If the port is the middle of closing, bail out now
2595 */
2596 if (tty_hung_up_p(filp) || (info->flags & ASYNC_CLOSING)) {
2597 wait_event_interruptible(info->close_wait,
2598 !(info->flags & ASYNC_CLOSING));
2599 return (info->flags & ASYNC_HUP_NOTIFY) ? -EAGAIN: -ERESTARTSYS;
2600 }
2601
2602 /*
2603 * Start up serial port
2604 */
2605 retval = startup(info);
2606 if (retval) {
2607 return retval;
2608 }
2609
2610 retval = block_til_ready(tty, filp, info);
2611 if (retval) {
2612#ifdef CY_DEBUG_OPEN
2613 printk(KERN_DEBUG "cyc:cy_open returning after block_til_ready "
2614 "with %d\n", retval);
2615#endif
2616 return retval;
2617 }
2618
2619 info->throttle = 0;
2620
2621#ifdef CY_DEBUG_OPEN
2622 printk(KERN_DEBUG "cyc:cy_open done\n");
2623#endif
2624 return 0;
2625} /* cy_open */
2626
2627/*
2628 * cy_wait_until_sent() --- wait until the transmitter is empty
2629 */
2630static void cy_wait_until_sent(struct tty_struct *tty, int timeout)
2631{
2632 struct cyclades_card *card;
2633 struct cyclades_port *info = tty->driver_data;
2634 void __iomem *base_addr;
2635 int chip, channel, index;
2636 unsigned long orig_jiffies;
2637 int char_time;
2638
2639 if (serial_paranoia_check(info, tty->name, "cy_wait_until_sent"))
2640 return;
2641
2642 if (info->xmit_fifo_size == 0)
2643 return; /* Just in case.... */
2644
2645 orig_jiffies = jiffies;
2646 /*
2647 * Set the check interval to be 1/5 of the estimated time to
2648 * send a single character, and make it at least 1. The check
2649 * interval should also be less than the timeout.
2650 *
2651 * Note: we have to use pretty tight timings here to satisfy
2652 * the NIST-PCTS.
2653 */
2654 char_time = (info->timeout - HZ / 50) / info->xmit_fifo_size;
2655 char_time = char_time / 5;
2656 if (char_time <= 0)
2657 char_time = 1;
2658 if (timeout < 0)
2659 timeout = 0;
2660 if (timeout)
2661 char_time = min(char_time, timeout);
2662 /*
2663 * If the transmitter hasn't cleared in twice the approximate
2664 * amount of time to send the entire FIFO, it probably won't
2665 * ever clear. This assumes the UART isn't doing flow
2666 * control, which is currently the case. Hence, if it ever
2667 * takes longer than info->timeout, this is probably due to a
2668 * UART bug of some kind. So, we clamp the timeout parameter at
2669 * 2*info->timeout.
2670 */
2671 if (!timeout || timeout > 2 * info->timeout)
2672 timeout = 2 * info->timeout;
2673#ifdef CY_DEBUG_WAIT_UNTIL_SENT
2674 printk(KERN_DEBUG "In cy_wait_until_sent(%d) check=%d, jiff=%lu...",
2675 timeout, char_time, jiffies);
2676#endif
2677 card = info->card;
2678 channel = (info->line) - (card->first_line);
2679 if (!IS_CYC_Z(*card)) {
2680 chip = channel >> 2;
2681 channel &= 0x03;
2682 index = card->bus_index;
2683 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
2684 while (readb(base_addr + (CySRER << index)) & CyTxRdy) {
2685#ifdef CY_DEBUG_WAIT_UNTIL_SENT
2686 printk(KERN_DEBUG "Not clean (jiff=%lu)...", jiffies);
2687#endif
2688 if (msleep_interruptible(jiffies_to_msecs(char_time)))
2689 break;
2690 if (timeout && time_after(jiffies, orig_jiffies +
2691 timeout))
2692 break;
2693 }
2694 } else {
2695 /* Nothing to do! */
2696 }
2697 /* Run one more char cycle */
2698 msleep_interruptible(jiffies_to_msecs(char_time * 5));
2699#ifdef CY_DEBUG_WAIT_UNTIL_SENT
2700 printk(KERN_DEBUG "Clean (jiff=%lu)...done\n", jiffies);
2701#endif
2702}
2703
2704/*
2705 * This routine is called when a particular tty device is closed.
2706 */
2707static void cy_close(struct tty_struct *tty, struct file *filp)
2708{
2709 struct cyclades_port *info = tty->driver_data;
2710 unsigned long flags;
2711
2712#ifdef CY_DEBUG_OTHER
2713 printk(KERN_DEBUG "cyc:cy_close ttyC%d\n", info->line);
2714#endif
2715
2716 if (!info || serial_paranoia_check(info, tty->name, "cy_close")) {
2717 return;
2718 }
2719
2720 CY_LOCK(info, flags);
2721 /* If the TTY is being hung up, nothing to do */
2722 if (tty_hung_up_p(filp)) {
2723 CY_UNLOCK(info, flags);
2724 return;
2725 }
2726#ifdef CY_DEBUG_OPEN
2727 printk(KERN_DEBUG "cyc:cy_close ttyC%d, count = %d\n", info->line,
2728 info->count);
2729#endif
2730 if ((tty->count == 1) && (info->count != 1)) {
2731 /*
2732 * Uh, oh. tty->count is 1, which means that the tty
2733 * structure will be freed. Info->count should always
2734 * be one in these conditions. If it's greater than
2735 * one, we've got real problems, since it means the
2736 * serial port won't be shutdown.
2737 */
2738 printk(KERN_ERR "cyc:cy_close: bad serial port count; "
2739 "tty->count is 1, info->count is %d\n", info->count);
2740 info->count = 1;
2741 }
2742#ifdef CY_DEBUG_COUNT
2743 printk(KERN_DEBUG "cyc:cy_close at (%d): decrementing count to %d\n",
2744 current->pid, info->count - 1);
2745#endif
2746 if (--info->count < 0) {
2747#ifdef CY_DEBUG_COUNT
2748 printk(KERN_DEBUG "cyc:cyc_close setting count to 0\n");
2749#endif
2750 info->count = 0;
2751 }
2752 if (info->count) {
2753 CY_UNLOCK(info, flags);
2754 return;
2755 }
2756 info->flags |= ASYNC_CLOSING;
2757
2758 /*
2759 * Now we wait for the transmit buffer to clear; and we notify
2760 * the line discipline to only process XON/XOFF characters.
2761 */
2762 tty->closing = 1;
2763 CY_UNLOCK(info, flags);
2764 if (info->closing_wait != CY_CLOSING_WAIT_NONE) {
2765 tty_wait_until_sent(tty, info->closing_wait);
2766 }
2767 CY_LOCK(info, flags);
2768
2769 if (!IS_CYC_Z(*info->card)) {
2770 int channel = info->line - info->card->first_line;
2771 int index = info->card->bus_index;
2772 void __iomem *base_addr = info->card->base_addr +
2773 (cy_chip_offset[channel >> 2] << index);
2774 /* Stop accepting input */
2775 channel &= 0x03;
2776 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
2777 cy_writeb(base_addr + (CySRER << index),
2778 readb(base_addr + (CySRER << index)) & ~CyRxData);
2779 if (info->flags & ASYNC_INITIALIZED) {
2780 /* Waiting for on-board buffers to be empty before closing
2781 the port */
2782 CY_UNLOCK(info, flags);
2783 cy_wait_until_sent(tty, info->timeout);
2784 CY_LOCK(info, flags);
2785 }
2786 } else {
2787#ifdef Z_WAKE
2788 /* Waiting for on-board buffers to be empty before closing the port */
2789 void __iomem *base_addr = info->card->base_addr;
2790 struct FIRM_ID __iomem *firm_id = base_addr + ID_ADDRESS;
2791 struct ZFW_CTRL __iomem *zfw_ctrl =
2792 base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
2793 struct CH_CTRL __iomem *ch_ctrl = zfw_ctrl->ch_ctrl;
2794 int channel = info->line - info->card->first_line;
2795 int retval;
2796
2797 if (readl(&ch_ctrl[channel].flow_status) != C_FS_TXIDLE) {
2798 retval = cyz_issue_cmd(info->card, channel,
2799 C_CM_IOCTLW, 0L);
2800 if (retval != 0) {
2801 printk(KERN_DEBUG "cyc:cy_close retval on "
2802 "ttyC%d was %x\n", info->line, retval);
2803 }
2804 CY_UNLOCK(info, flags);
2805 wait_for_completion_interruptible(&info->shutdown_wait);
2806 CY_LOCK(info, flags);
2807 }
2808#endif
2809 }
2810
2811 CY_UNLOCK(info, flags);
2812 shutdown(info);
2813 if (tty->driver->flush_buffer)
2814 tty->driver->flush_buffer(tty);
2815 tty_ldisc_flush(tty);
2816 CY_LOCK(info, flags);
2817
2818 tty->closing = 0;
2819 info->event = 0;
2820 info->tty = NULL;
2821 if (info->blocked_open) {
2822 CY_UNLOCK(info, flags);
2823 if (info->close_delay) {
2824 msleep_interruptible(jiffies_to_msecs
2825 (info->close_delay));
2826 }
2827 wake_up_interruptible(&info->open_wait);
2828 CY_LOCK(info, flags);
2829 }
2830 info->flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CLOSING);
2831 wake_up_interruptible(&info->close_wait);
2832
2833#ifdef CY_DEBUG_OTHER
2834 printk(KERN_DEBUG "cyc:cy_close done\n");
2835#endif
2836
2837 CY_UNLOCK(info, flags);
2838} /* cy_close */
2839
2840/* This routine gets called when tty_write has put something into
2841 * the write_queue. The characters may come from user space or
2842 * kernel space.
2843 *
2844 * This routine will return the number of characters actually
2845 * accepted for writing.
2846 *
2847 * If the port is not already transmitting stuff, start it off by
2848 * enabling interrupts. The interrupt service routine will then
2849 * ensure that the characters are sent.
2850 * If the port is already active, there is no need to kick it.
2851 *
2852 */
2853static int cy_write(struct tty_struct *tty, const unsigned char *buf, int count)
2854{
2855 struct cyclades_port *info = tty->driver_data;
2856 unsigned long flags;
2857 int c, ret = 0;
2858
2859#ifdef CY_DEBUG_IO
2860 printk(KERN_DEBUG "cyc:cy_write ttyC%d\n", info->line);
2861#endif
2862
2863 if (serial_paranoia_check(info, tty->name, "cy_write")) {
2864 return 0;
2865 }
2866
2867 if (!info->xmit_buf)
2868 return 0;
2869
2870 CY_LOCK(info, flags);
2871 while (1) {
2872 c = min(count, min((int)(SERIAL_XMIT_SIZE - info->xmit_cnt - 1),
2873 (int)(SERIAL_XMIT_SIZE - info->xmit_head)));
2874
2875 if (c <= 0)
2876 break;
2877
2878 memcpy(info->xmit_buf + info->xmit_head, buf, c);
2879 info->xmit_head = (info->xmit_head + c) &
2880 (SERIAL_XMIT_SIZE - 1);
2881 info->xmit_cnt += c;
2882 buf += c;
2883 count -= c;
2884 ret += c;
2885 }
2886 CY_UNLOCK(info, flags);
2887
2888 info->idle_stats.xmit_bytes += ret;
2889 info->idle_stats.xmit_idle = jiffies;
2890
2891 if (info->xmit_cnt && !tty->stopped && !tty->hw_stopped) {
2892 start_xmit(info);
2893 }
2894 return ret;
2895} /* cy_write */
2896
2897/*
2898 * This routine is called by the kernel to write a single
2899 * character to the tty device. If the kernel uses this routine,
2900 * it must call the flush_chars() routine (if defined) when it is
2901 * done stuffing characters into the driver. If there is no room
2902 * in the queue, the character is ignored.
2903 */
2904static void cy_put_char(struct tty_struct *tty, unsigned char ch)
2905{
2906 struct cyclades_port *info = tty->driver_data;
2907 unsigned long flags;
2908
2909#ifdef CY_DEBUG_IO
2910 printk(KERN_DEBUG "cyc:cy_put_char ttyC%d\n", info->line);
2911#endif
2912
2913 if (serial_paranoia_check(info, tty->name, "cy_put_char"))
2914 return;
2915
2916 if (!info->xmit_buf)
2917 return;
2918
2919 CY_LOCK(info, flags);
2920 if (info->xmit_cnt >= (int)(SERIAL_XMIT_SIZE - 1)) {
2921 CY_UNLOCK(info, flags);
2922 return;
2923 }
2924
2925 info->xmit_buf[info->xmit_head++] = ch;
2926 info->xmit_head &= SERIAL_XMIT_SIZE - 1;
2927 info->xmit_cnt++;
2928 info->idle_stats.xmit_bytes++;
2929 info->idle_stats.xmit_idle = jiffies;
2930 CY_UNLOCK(info, flags);
2931} /* cy_put_char */
2932
2933/*
2934 * This routine is called by the kernel after it has written a
2935 * series of characters to the tty device using put_char().
2936 */
2937static void cy_flush_chars(struct tty_struct *tty)
2938{
2939 struct cyclades_port *info = tty->driver_data;
2940
2941#ifdef CY_DEBUG_IO
2942 printk(KERN_DEBUG "cyc:cy_flush_chars ttyC%d\n", info->line);
2943#endif
2944
2945 if (serial_paranoia_check(info, tty->name, "cy_flush_chars"))
2946 return;
2947
2948 if (info->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped ||
2949 !info->xmit_buf)
2950 return;
2951
2952 start_xmit(info);
2953} /* cy_flush_chars */
2954
2955/*
2956 * This routine returns the numbers of characters the tty driver
2957 * will accept for queuing to be written. This number is subject
2958 * to change as output buffers get emptied, or if the output flow
2959 * control is activated.
2960 */
2961static int cy_write_room(struct tty_struct *tty)
2962{
2963 struct cyclades_port *info = tty->driver_data;
2964 int ret;
2965
2966#ifdef CY_DEBUG_IO
2967 printk(KERN_DEBUG "cyc:cy_write_room ttyC%d\n", info->line);
2968#endif
2969
2970 if (serial_paranoia_check(info, tty->name, "cy_write_room"))
2971 return 0;
2972 ret = SERIAL_XMIT_SIZE - info->xmit_cnt - 1;
2973 if (ret < 0)
2974 ret = 0;
2975 return ret;
2976} /* cy_write_room */
2977
2978static int cy_chars_in_buffer(struct tty_struct *tty)
2979{
2980 struct cyclades_card *card;
2981 struct cyclades_port *info = tty->driver_data;
2982 int channel;
2983
2984 if (serial_paranoia_check(info, tty->name, "cy_chars_in_buffer"))
2985 return 0;
2986
2987 card = info->card;
2988 channel = (info->line) - (card->first_line);
2989
2990#ifdef Z_EXT_CHARS_IN_BUFFER
2991 if (!IS_CYC_Z(cy_card[card])) {
2992#endif /* Z_EXT_CHARS_IN_BUFFER */
2993#ifdef CY_DEBUG_IO
2994 printk(KERN_DEBUG "cyc:cy_chars_in_buffer ttyC%d %d\n",
2995 info->line, info->xmit_cnt);
2996#endif
2997 return info->xmit_cnt;
2998#ifdef Z_EXT_CHARS_IN_BUFFER
2999 } else {
3000 static struct FIRM_ID *firm_id;
3001 static struct ZFW_CTRL *zfw_ctrl;
3002 static struct CH_CTRL *ch_ctrl;
3003 static struct BUF_CTRL *buf_ctrl;
3004 int char_count;
3005 __u32 tx_put, tx_get, tx_bufsize;
3006
3007 firm_id = card->base_addr + ID_ADDRESS;
3008 zfw_ctrl = card->base_addr +
3009 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
3010 ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]);
3011 buf_ctrl = &(zfw_ctrl->buf_ctrl[channel]);
3012
3013 tx_get = readl(&buf_ctrl->tx_get);
3014 tx_put = readl(&buf_ctrl->tx_put);
3015 tx_bufsize = readl(&buf_ctrl->tx_bufsize);
3016 if (tx_put >= tx_get)
3017 char_count = tx_put - tx_get;
3018 else
3019 char_count = tx_put - tx_get + tx_bufsize;
3020#ifdef CY_DEBUG_IO
3021 printk(KERN_DEBUG "cyc:cy_chars_in_buffer ttyC%d %d\n",
3022 info->line, info->xmit_cnt + char_count);
3023#endif
3024 return info->xmit_cnt + char_count;
3025 }
3026#endif /* Z_EXT_CHARS_IN_BUFFER */
3027} /* cy_chars_in_buffer */
3028
3029/*
3030 * ------------------------------------------------------------
3031 * cy_ioctl() and friends
3032 * ------------------------------------------------------------
3033 */
3034
3035static void cyy_baud_calc(struct cyclades_port *info, __u32 baud)
3036{
3037 int co, co_val, bpr;
3038 __u32 cy_clock = ((info->chip_rev >= CD1400_REV_J) ? 60000000 :
3039 25000000);
3040
3041 if (baud == 0) {
3042 info->tbpr = info->tco = info->rbpr = info->rco = 0;
3043 return;
3044 }
3045
3046 /* determine which prescaler to use */
3047 for (co = 4, co_val = 2048; co; co--, co_val >>= 2) {
3048 if (cy_clock / co_val / baud > 63)
3049 break;
3050 }
3051
3052 bpr = (cy_clock / co_val * 2 / baud + 1) / 2;
3053 if (bpr > 255)
3054 bpr = 255;
3055
3056 info->tbpr = info->rbpr = bpr;
3057 info->tco = info->rco = co;
3058}
3059
3060/*
3061 * This routine finds or computes the various line characteristics.
3062 * It used to be called config_setup
3063 */
3064static void set_line_char(struct cyclades_port *info)
3065{
3066 struct cyclades_card *card;
3067 unsigned long flags;
3068 void __iomem *base_addr;
3069 int chip, channel, index;
3070 unsigned cflag, iflag;
3071 unsigned short chip_number;
3072 int baud, baud_rate = 0;
3073 int i;
3074
3075 if (!info->tty || !info->tty->termios) {
3076 return;
3077 }
3078 if (info->line == -1) {
3079 return;
3080 }
3081 cflag = info->tty->termios->c_cflag;
3082 iflag = info->tty->termios->c_iflag;
3083
3084 /*
3085 * Set up the tty->alt_speed kludge
3086 */
3087 if (info->tty) {
3088 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
3089 info->tty->alt_speed = 57600;
3090 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
3091 info->tty->alt_speed = 115200;
3092 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
3093 info->tty->alt_speed = 230400;
3094 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
3095 info->tty->alt_speed = 460800;
3096 }
3097
3098 card = info->card;
3099 channel = info->line - card->first_line;
3100 chip_number = channel / 4;
3101
3102 if (!IS_CYC_Z(*card)) {
3103
3104 index = card->bus_index;
3105
3106 /* baud rate */
3107 baud = tty_get_baud_rate(info->tty);
3108 if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
3109 ASYNC_SPD_CUST) {
3110 if (info->custom_divisor)
3111 baud_rate = info->baud / info->custom_divisor;
3112 else
3113 baud_rate = info->baud;
3114 } else if (baud > CD1400_MAX_SPEED) {
3115 baud = CD1400_MAX_SPEED;
3116 }
3117 /* find the baud index */
3118 for (i = 0; i < 20; i++) {
3119 if (baud == baud_table[i]) {
3120 break;
3121 }
3122 }
3123 if (i == 20) {
3124 i = 19; /* CD1400_MAX_SPEED */
3125 }
3126
3127 if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
3128 ASYNC_SPD_CUST) {
3129 cyy_baud_calc(info, baud_rate);
3130 } else {
3131 if (info->chip_rev >= CD1400_REV_J) {
3132 /* It is a CD1400 rev. J or later */
3133 info->tbpr = baud_bpr_60[i]; /* Tx BPR */
3134 info->tco = baud_co_60[i]; /* Tx CO */
3135 info->rbpr = baud_bpr_60[i]; /* Rx BPR */
3136 info->rco = baud_co_60[i]; /* Rx CO */
3137 } else {
3138 info->tbpr = baud_bpr_25[i]; /* Tx BPR */
3139 info->tco = baud_co_25[i]; /* Tx CO */
3140 info->rbpr = baud_bpr_25[i]; /* Rx BPR */
3141 info->rco = baud_co_25[i]; /* Rx CO */
3142 }
3143 }
3144 if (baud_table[i] == 134) {
3145 /* get it right for 134.5 baud */
3146 info->timeout = (info->xmit_fifo_size * HZ * 30 / 269) +
3147 2;
3148 } else if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
3149 ASYNC_SPD_CUST) {
3150 info->timeout = (info->xmit_fifo_size * HZ * 15 /
3151 baud_rate) + 2;
3152 } else if (baud_table[i]) {
3153 info->timeout = (info->xmit_fifo_size * HZ * 15 /
3154 baud_table[i]) + 2;
3155 /* this needs to be propagated into the card info */
3156 } else {
3157 info->timeout = 0;
3158 }
3159 /* By tradition (is it a standard?) a baud rate of zero
3160 implies the line should be/has been closed. A bit
3161 later in this routine such a test is performed. */
3162
3163 /* byte size and parity */
3164 info->cor5 = 0;
3165 info->cor4 = 0;
3166 /* receive threshold */
3167 info->cor3 = (info->default_threshold ?
3168 info->default_threshold : baud_cor3[i]);
3169 info->cor2 = CyETC;
3170 switch (cflag & CSIZE) {
3171 case CS5:
3172 info->cor1 = Cy_5_BITS;
3173 break;
3174 case CS6:
3175 info->cor1 = Cy_6_BITS;
3176 break;
3177 case CS7:
3178 info->cor1 = Cy_7_BITS;
3179 break;
3180 case CS8:
3181 info->cor1 = Cy_8_BITS;
3182 break;
3183 }
3184 if (cflag & CSTOPB) {
3185 info->cor1 |= Cy_2_STOP;
3186 }
3187 if (cflag & PARENB) {
3188 if (cflag & PARODD) {
3189 info->cor1 |= CyPARITY_O;
3190 } else {
3191 info->cor1 |= CyPARITY_E;
3192 }
3193 } else {
3194 info->cor1 |= CyPARITY_NONE;
3195 }
3196
3197 /* CTS flow control flag */
3198 if (cflag & CRTSCTS) {
3199 info->flags |= ASYNC_CTS_FLOW;
3200 info->cor2 |= CyCtsAE;
3201 } else {
3202 info->flags &= ~ASYNC_CTS_FLOW;
3203 info->cor2 &= ~CyCtsAE;
3204 }
3205 if (cflag & CLOCAL)
3206 info->flags &= ~ASYNC_CHECK_CD;
3207 else
3208 info->flags |= ASYNC_CHECK_CD;
3209
3210 /***********************************************
3211 The hardware option, CyRtsAO, presents RTS when
3212 the chip has characters to send. Since most modems
3213 use RTS as reverse (inbound) flow control, this
3214 option is not used. If inbound flow control is
3215 necessary, DTR can be programmed to provide the
3216 appropriate signals for use with a non-standard
3217 cable. Contact Marcio Saito for details.
3218 ***********************************************/
3219
3220 chip = channel >> 2;
3221 channel &= 0x03;
3222 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3223
3224 CY_LOCK(info, flags);
3225 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
3226
3227 /* tx and rx baud rate */
3228
3229 cy_writeb(base_addr + (CyTCOR << index), info->tco);
3230 cy_writeb(base_addr + (CyTBPR << index), info->tbpr);
3231 cy_writeb(base_addr + (CyRCOR << index), info->rco);
3232 cy_writeb(base_addr + (CyRBPR << index), info->rbpr);
3233
3234 /* set line characteristics according configuration */
3235
3236 cy_writeb(base_addr + (CySCHR1 << index),
3237 START_CHAR(info->tty));
3238 cy_writeb(base_addr + (CySCHR2 << index), STOP_CHAR(info->tty));
3239 cy_writeb(base_addr + (CyCOR1 << index), info->cor1);
3240 cy_writeb(base_addr + (CyCOR2 << index), info->cor2);
3241 cy_writeb(base_addr + (CyCOR3 << index), info->cor3);
3242 cy_writeb(base_addr + (CyCOR4 << index), info->cor4);
3243 cy_writeb(base_addr + (CyCOR5 << index), info->cor5);
3244
3245 cyy_issue_cmd(base_addr, CyCOR_CHANGE | CyCOR1ch | CyCOR2ch |
3246 CyCOR3ch, index);
3247
3248 cy_writeb(base_addr + (CyCAR << index), (u_char) channel); /* !!! Is this needed? */
3249 cy_writeb(base_addr + (CyRTPR << index),
3250 (info->default_timeout ? info->default_timeout : 0x02));
3251 /* 10ms rx timeout */
3252
3253 if (C_CLOCAL(info->tty)) {
3254 /* without modem intr */
3255 cy_writeb(base_addr + (CySRER << index),
3256 readb(base_addr + (CySRER << index)) | CyMdmCh);
3257 /* act on 1->0 modem transitions */
3258 if ((cflag & CRTSCTS) && info->rflow) {
3259 cy_writeb(base_addr + (CyMCOR1 << index),
3260 (CyCTS | rflow_thr[i]));
3261 } else {
3262 cy_writeb(base_addr + (CyMCOR1 << index),
3263 CyCTS);
3264 }
3265 /* act on 0->1 modem transitions */
3266 cy_writeb(base_addr + (CyMCOR2 << index), CyCTS);
3267 } else {
3268 /* without modem intr */
3269 cy_writeb(base_addr + (CySRER << index),
3270 readb(base_addr +
3271 (CySRER << index)) | CyMdmCh);
3272 /* act on 1->0 modem transitions */
3273 if ((cflag & CRTSCTS) && info->rflow) {
3274 cy_writeb(base_addr + (CyMCOR1 << index),
3275 (CyDSR | CyCTS | CyRI | CyDCD |
3276 rflow_thr[i]));
3277 } else {
3278 cy_writeb(base_addr + (CyMCOR1 << index),
3279 CyDSR | CyCTS | CyRI | CyDCD);
3280 }
3281 /* act on 0->1 modem transitions */
3282 cy_writeb(base_addr + (CyMCOR2 << index),
3283 CyDSR | CyCTS | CyRI | CyDCD);
3284 }
3285
3286 if (i == 0) { /* baud rate is zero, turn off line */
3287 if (info->rtsdtr_inv) {
3288 cy_writeb(base_addr + (CyMSVR1 << index),
3289 ~CyRTS);
3290 } else {
3291 cy_writeb(base_addr + (CyMSVR2 << index),
3292 ~CyDTR);
3293 }
3294#ifdef CY_DEBUG_DTR
3295 printk(KERN_DEBUG "cyc:set_line_char dropping DTR\n");
3296 printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
3297 readb(base_addr + (CyMSVR1 << index)),
3298 readb(base_addr + (CyMSVR2 << index)));
3299#endif
3300 } else {
3301 if (info->rtsdtr_inv) {
3302 cy_writeb(base_addr + (CyMSVR1 << index),
3303 CyRTS);
3304 } else {
3305 cy_writeb(base_addr + (CyMSVR2 << index),
3306 CyDTR);
3307 }
3308#ifdef CY_DEBUG_DTR
3309 printk(KERN_DEBUG "cyc:set_line_char raising DTR\n");
3310 printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
3311 readb(base_addr + (CyMSVR1 << index)),
3312 readb(base_addr + (CyMSVR2 << index)));
3313#endif
3314 }
3315
3316 if (info->tty) {
3317 clear_bit(TTY_IO_ERROR, &info->tty->flags);
3318 }
3319 CY_UNLOCK(info, flags);
3320
3321 } else {
3322 struct FIRM_ID __iomem *firm_id;
3323 struct ZFW_CTRL __iomem *zfw_ctrl;
3324 struct BOARD_CTRL __iomem *board_ctrl;
3325 struct CH_CTRL __iomem *ch_ctrl;
3326 struct BUF_CTRL __iomem *buf_ctrl;
3327 __u32 sw_flow;
3328 int retval;
3329
3330 firm_id = card->base_addr + ID_ADDRESS;
3331 if (!ISZLOADED(*card)) {
3332 return;
3333 }
3334
3335 zfw_ctrl = card->base_addr +
3336 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
3337 board_ctrl = &zfw_ctrl->board_ctrl;
3338 ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]);
3339 buf_ctrl = &zfw_ctrl->buf_ctrl[channel];
3340
3341 /* baud rate */
3342 baud = tty_get_baud_rate(info->tty);
3343 if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
3344 ASYNC_SPD_CUST) {
3345 if (info->custom_divisor)
3346 baud_rate = info->baud / info->custom_divisor;
3347 else
3348 baud_rate = info->baud;
3349 } else if (baud > CYZ_MAX_SPEED) {
3350 baud = CYZ_MAX_SPEED;
3351 }
3352 cy_writel(&ch_ctrl->comm_baud, baud);
3353
3354 if (baud == 134) {
3355 /* get it right for 134.5 baud */
3356 info->timeout = (info->xmit_fifo_size * HZ * 30 / 269) +
3357 2;
3358 } else if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
3359 ASYNC_SPD_CUST) {
3360 info->timeout = (info->xmit_fifo_size * HZ * 15 /
3361 baud_rate) + 2;
3362 } else if (baud) {
3363 info->timeout = (info->xmit_fifo_size * HZ * 15 /
3364 baud) + 2;
3365 /* this needs to be propagated into the card info */
3366 } else {
3367 info->timeout = 0;
3368 }
3369
3370 /* byte size and parity */
3371 switch (cflag & CSIZE) {
3372 case CS5:
3373 cy_writel(&ch_ctrl->comm_data_l, C_DL_CS5);
3374 break;
3375 case CS6:
3376 cy_writel(&ch_ctrl->comm_data_l, C_DL_CS6);
3377 break;
3378 case CS7:
3379 cy_writel(&ch_ctrl->comm_data_l, C_DL_CS7);
3380 break;
3381 case CS8:
3382 cy_writel(&ch_ctrl->comm_data_l, C_DL_CS8);
3383 break;
3384 }
3385 if (cflag & CSTOPB) {
3386 cy_writel(&ch_ctrl->comm_data_l,
3387 readl(&ch_ctrl->comm_data_l) | C_DL_2STOP);
3388 } else {
3389 cy_writel(&ch_ctrl->comm_data_l,
3390 readl(&ch_ctrl->comm_data_l) | C_DL_1STOP);
3391 }
3392 if (cflag & PARENB) {
3393 if (cflag & PARODD) {
3394 cy_writel(&ch_ctrl->comm_parity, C_PR_ODD);
3395 } else {
3396 cy_writel(&ch_ctrl->comm_parity, C_PR_EVEN);
3397 }
3398 } else {
3399 cy_writel(&ch_ctrl->comm_parity, C_PR_NONE);
3400 }
3401
3402 /* CTS flow control flag */
3403 if (cflag & CRTSCTS) {
3404 cy_writel(&ch_ctrl->hw_flow,
3405 readl(&ch_ctrl->hw_flow) | C_RS_CTS | C_RS_RTS);
3406 } else {
3407 cy_writel(&ch_ctrl->hw_flow, readl(&ch_ctrl->hw_flow) &
3408 ~(C_RS_CTS | C_RS_RTS));
3409 }
3410 /* As the HW flow control is done in firmware, the driver
3411 doesn't need to care about it */
3412 info->flags &= ~ASYNC_CTS_FLOW;
3413
3414 /* XON/XOFF/XANY flow control flags */
3415 sw_flow = 0;
3416 if (iflag & IXON) {
3417 sw_flow |= C_FL_OXX;
3418 if (iflag & IXANY)
3419 sw_flow |= C_FL_OIXANY;
3420 }
3421 cy_writel(&ch_ctrl->sw_flow, sw_flow);
3422
3423 retval = cyz_issue_cmd(card, channel, C_CM_IOCTL, 0L);
3424 if (retval != 0) {
3425 printk(KERN_ERR "cyc:set_line_char retval on ttyC%d "
3426 "was %x\n", info->line, retval);
3427 }
3428
3429 /* CD sensitivity */
3430 if (cflag & CLOCAL) {
3431 info->flags &= ~ASYNC_CHECK_CD;
3432 } else {
3433 info->flags |= ASYNC_CHECK_CD;
3434 }
3435
3436 if (baud == 0) { /* baud rate is zero, turn off line */
3437 cy_writel(&ch_ctrl->rs_control,
3438 readl(&ch_ctrl->rs_control) & ~C_RS_DTR);
3439#ifdef CY_DEBUG_DTR
3440 printk(KERN_DEBUG "cyc:set_line_char dropping Z DTR\n");
3441#endif
3442 } else {
3443 cy_writel(&ch_ctrl->rs_control,
3444 readl(&ch_ctrl->rs_control) | C_RS_DTR);
3445#ifdef CY_DEBUG_DTR
3446 printk(KERN_DEBUG "cyc:set_line_char raising Z DTR\n");
3447#endif
3448 }
3449
3450 retval = cyz_issue_cmd(card, channel, C_CM_IOCTLM,0L);
3451 if (retval != 0) {
3452 printk(KERN_ERR "cyc:set_line_char(2) retval on ttyC%d "
3453 "was %x\n", info->line, retval);
3454 }
3455
3456 if (info->tty) {
3457 clear_bit(TTY_IO_ERROR, &info->tty->flags);
3458 }
3459 }
3460} /* set_line_char */
3461
3462static int
3463get_serial_info(struct cyclades_port *info,
3464 struct serial_struct __user * retinfo)
3465{
3466 struct serial_struct tmp;
3467 struct cyclades_card *cinfo = info->card;
3468
3469 if (!retinfo)
3470 return -EFAULT;
3471 memset(&tmp, 0, sizeof(tmp));
3472 tmp.type = info->type;
3473 tmp.line = info->line;
3474 tmp.port = (info->card - cy_card) * 0x100 + info->line -
3475 cinfo->first_line;
3476 tmp.irq = cinfo->irq;
3477 tmp.flags = info->flags;
3478 tmp.close_delay = info->close_delay;
3479 tmp.closing_wait = info->closing_wait;
3480 tmp.baud_base = info->baud;
3481 tmp.custom_divisor = info->custom_divisor;
3482 tmp.hub6 = 0; /*!!! */
3483 return copy_to_user(retinfo, &tmp, sizeof(*retinfo)) ? -EFAULT : 0;
3484} /* get_serial_info */
3485
3486static int
3487set_serial_info(struct cyclades_port *info,
3488 struct serial_struct __user * new_info)
3489{
3490 struct serial_struct new_serial;
3491 struct cyclades_port old_info;
3492
3493 if (copy_from_user(&new_serial, new_info, sizeof(new_serial)))
3494 return -EFAULT;
3495 old_info = *info;
3496
3497 if (!capable(CAP_SYS_ADMIN)) {
3498 if (new_serial.close_delay != info->close_delay ||
3499 new_serial.baud_base != info->baud ||
3500 (new_serial.flags & ASYNC_FLAGS &
3501 ~ASYNC_USR_MASK) !=
3502 (info->flags & ASYNC_FLAGS & ~ASYNC_USR_MASK))
3503 return -EPERM;
3504 info->flags = (info->flags & ~ASYNC_USR_MASK) |
3505 (new_serial.flags & ASYNC_USR_MASK);
3506 info->baud = new_serial.baud_base;
3507 info->custom_divisor = new_serial.custom_divisor;
3508 goto check_and_exit;
3509 }
3510
3511 /*
3512 * OK, past this point, all the error checking has been done.
3513 * At this point, we start making changes.....
3514 */
3515
3516 info->baud = new_serial.baud_base;
3517 info->custom_divisor = new_serial.custom_divisor;
3518 info->flags = (info->flags & ~ASYNC_FLAGS) |
3519 (new_serial.flags & ASYNC_FLAGS);
3520 info->close_delay = new_serial.close_delay * HZ / 100;
3521 info->closing_wait = new_serial.closing_wait * HZ / 100;
3522
3523check_and_exit:
3524 if (info->flags & ASYNC_INITIALIZED) {
3525 set_line_char(info);
3526 return 0;
3527 } else {
3528 return startup(info);
3529 }
3530} /* set_serial_info */
3531
3532/*
3533 * get_lsr_info - get line status register info
3534 *
3535 * Purpose: Let user call ioctl() to get info when the UART physically
3536 * is emptied. On bus types like RS485, the transmitter must
3537 * release the bus after transmitting. This must be done when
3538 * the transmit shift register is empty, not be done when the
3539 * transmit holding register is empty. This functionality
3540 * allows an RS485 driver to be written in user space.
3541 */
3542static int get_lsr_info(struct cyclades_port *info, unsigned int __user * value)
3543{
3544 struct cyclades_card *card;
3545 int chip, channel, index;
3546 unsigned char status;
3547 unsigned int result;
3548 unsigned long flags;
3549 void __iomem *base_addr;
3550
3551 card = info->card;
3552 channel = (info->line) - (card->first_line);
3553 if (!IS_CYC_Z(*card)) {
3554 chip = channel >> 2;
3555 channel &= 0x03;
3556 index = card->bus_index;
3557 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3558
3559 CY_LOCK(info, flags);
3560 status = readb(base_addr + (CySRER << index)) &
3561 (CyTxRdy | CyTxMpty);
3562 CY_UNLOCK(info, flags);
3563 result = (status ? 0 : TIOCSER_TEMT);
3564 } else {
3565 /* Not supported yet */
3566 return -EINVAL;
3567 }
3568 return put_user(result, (unsigned long __user *)value);
3569}
3570
3571static int cy_tiocmget(struct tty_struct *tty, struct file *file)
3572{
3573 struct cyclades_port *info = tty->driver_data;
3574 struct cyclades_card *card;
3575 int chip, channel, index;
3576 void __iomem *base_addr;
3577 unsigned long flags;
3578 unsigned char status;
3579 unsigned long lstatus;
3580 unsigned int result;
3581 struct FIRM_ID __iomem *firm_id;
3582 struct ZFW_CTRL __iomem *zfw_ctrl;
3583 struct BOARD_CTRL __iomem *board_ctrl;
3584 struct CH_CTRL __iomem *ch_ctrl;
3585
3586 if (serial_paranoia_check(info, tty->name, __FUNCTION__))
3587 return -ENODEV;
3588
3589 card = info->card;
3590 channel = info->line - card->first_line;
3591 if (!IS_CYC_Z(*card)) {
3592 chip = channel >> 2;
3593 channel &= 0x03;
3594 index = card->bus_index;
3595 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3596
3597 CY_LOCK(info, flags);
3598 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
3599 status = readb(base_addr + (CyMSVR1 << index));
3600 status |= readb(base_addr + (CyMSVR2 << index));
3601 CY_UNLOCK(info, flags);
3602
3603 if (info->rtsdtr_inv) {
3604 result = ((status & CyRTS) ? TIOCM_DTR : 0) |
3605 ((status & CyDTR) ? TIOCM_RTS : 0);
3606 } else {
3607 result = ((status & CyRTS) ? TIOCM_RTS : 0) |
3608 ((status & CyDTR) ? TIOCM_DTR : 0);
3609 }
3610 result |= ((status & CyDCD) ? TIOCM_CAR : 0) |
3611 ((status & CyRI) ? TIOCM_RNG : 0) |
3612 ((status & CyDSR) ? TIOCM_DSR : 0) |
3613 ((status & CyCTS) ? TIOCM_CTS : 0);
3614 } else {
3615 base_addr = card->base_addr;
3616 firm_id = card->base_addr + ID_ADDRESS;
3617 if (ISZLOADED(*card)) {
3618 zfw_ctrl = card->base_addr +
3619 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
3620 board_ctrl = &zfw_ctrl->board_ctrl;
3621 ch_ctrl = zfw_ctrl->ch_ctrl;
3622 lstatus = readl(&ch_ctrl[channel].rs_status);
3623 result = ((lstatus & C_RS_RTS) ? TIOCM_RTS : 0) |
3624 ((lstatus & C_RS_DTR) ? TIOCM_DTR : 0) |
3625 ((lstatus & C_RS_DCD) ? TIOCM_CAR : 0) |
3626 ((lstatus & C_RS_RI) ? TIOCM_RNG : 0) |
3627 ((lstatus & C_RS_DSR) ? TIOCM_DSR : 0) |
3628 ((lstatus & C_RS_CTS) ? TIOCM_CTS : 0);
3629 } else {
3630 result = 0;
3631 return -ENODEV;
3632 }
3633
3634 }
3635 return result;
3636} /* cy_tiomget */
3637
3638static int
3639cy_tiocmset(struct tty_struct *tty, struct file *file,
3640 unsigned int set, unsigned int clear)
3641{
3642 struct cyclades_port *info = tty->driver_data;
3643 struct cyclades_card *card;
3644 int chip, channel, index;
3645 void __iomem *base_addr;
3646 unsigned long flags;
3647 struct FIRM_ID __iomem *firm_id;
3648 struct ZFW_CTRL __iomem *zfw_ctrl;
3649 struct BOARD_CTRL __iomem *board_ctrl;
3650 struct CH_CTRL __iomem *ch_ctrl;
3651 int retval;
3652
3653 if (serial_paranoia_check(info, tty->name, __FUNCTION__))
3654 return -ENODEV;
3655
3656 card = info->card;
3657 channel = (info->line) - (card->first_line);
3658 if (!IS_CYC_Z(*card)) {
3659 chip = channel >> 2;
3660 channel &= 0x03;
3661 index = card->bus_index;
3662 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3663
3664 if (set & TIOCM_RTS) {
3665 CY_LOCK(info, flags);
3666 cy_writeb(base_addr + (CyCAR << index),
3667 (u_char) channel);
3668 if (info->rtsdtr_inv) {
3669 cy_writeb(base_addr + (CyMSVR2 << index),
3670 CyDTR);
3671 } else {
3672 cy_writeb(base_addr + (CyMSVR1 << index),
3673 CyRTS);
3674 }
3675 CY_UNLOCK(info, flags);
3676 }
3677 if (clear & TIOCM_RTS) {
3678 CY_LOCK(info, flags);
3679 cy_writeb(base_addr + (CyCAR << index),
3680 (u_char) channel);
3681 if (info->rtsdtr_inv) {
3682 cy_writeb(base_addr + (CyMSVR2 << index),
3683 ~CyDTR);
3684 } else {
3685 cy_writeb(base_addr + (CyMSVR1 << index),
3686 ~CyRTS);
3687 }
3688 CY_UNLOCK(info, flags);
3689 }
3690 if (set & TIOCM_DTR) {
3691 CY_LOCK(info, flags);
3692 cy_writeb(base_addr + (CyCAR << index),
3693 (u_char) channel);
3694 if (info->rtsdtr_inv) {
3695 cy_writeb(base_addr + (CyMSVR1 << index),
3696 CyRTS);
3697 } else {
3698 cy_writeb(base_addr + (CyMSVR2 << index),
3699 CyDTR);
3700 }
3701#ifdef CY_DEBUG_DTR
3702 printk(KERN_DEBUG "cyc:set_modem_info raising DTR\n");
3703 printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
3704 readb(base_addr + (CyMSVR1 << index)),
3705 readb(base_addr + (CyMSVR2 << index)));
3706#endif
3707 CY_UNLOCK(info, flags);
3708 }
3709 if (clear & TIOCM_DTR) {
3710 CY_LOCK(info, flags);
3711 cy_writeb(base_addr + (CyCAR << index),
3712 (u_char) channel);
3713 if (info->rtsdtr_inv) {
3714 cy_writeb(base_addr + (CyMSVR1 << index),
3715 ~CyRTS);
3716 } else {
3717 cy_writeb(base_addr + (CyMSVR2 << index),
3718 ~CyDTR);
3719 }
3720
3721#ifdef CY_DEBUG_DTR
3722 printk(KERN_DEBUG "cyc:set_modem_info dropping DTR\n");
3723 printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
3724 readb(base_addr + (CyMSVR1 << index)),
3725 readb(base_addr + (CyMSVR2 << index)));
3726#endif
3727 CY_UNLOCK(info, flags);
3728 }
3729 } else {
3730 base_addr = card->base_addr;
3731
3732 firm_id = card->base_addr + ID_ADDRESS;
3733 if (ISZLOADED(*card)) {
3734 zfw_ctrl = card->base_addr +
3735 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
3736 board_ctrl = &zfw_ctrl->board_ctrl;
3737 ch_ctrl = zfw_ctrl->ch_ctrl;
3738
3739 if (set & TIOCM_RTS) {
3740 CY_LOCK(info, flags);
3741 cy_writel(&ch_ctrl[channel].rs_control,
3742 readl(&ch_ctrl[channel].rs_control) |
3743 C_RS_RTS);
3744 CY_UNLOCK(info, flags);
3745 }
3746 if (clear & TIOCM_RTS) {
3747 CY_LOCK(info, flags);
3748 cy_writel(&ch_ctrl[channel].rs_control,
3749 readl(&ch_ctrl[channel].rs_control) &
3750 ~C_RS_RTS);
3751 CY_UNLOCK(info, flags);
3752 }
3753 if (set & TIOCM_DTR) {
3754 CY_LOCK(info, flags);
3755 cy_writel(&ch_ctrl[channel].rs_control,
3756 readl(&ch_ctrl[channel].rs_control) |
3757 C_RS_DTR);
3758#ifdef CY_DEBUG_DTR
3759 printk(KERN_DEBUG "cyc:set_modem_info raising "
3760 "Z DTR\n");
3761#endif
3762 CY_UNLOCK(info, flags);
3763 }
3764 if (clear & TIOCM_DTR) {
3765 CY_LOCK(info, flags);
3766 cy_writel(&ch_ctrl[channel].rs_control,
3767 readl(&ch_ctrl[channel].rs_control) &
3768 ~C_RS_DTR);
3769#ifdef CY_DEBUG_DTR
3770 printk(KERN_DEBUG "cyc:set_modem_info clearing "
3771 "Z DTR\n");
3772#endif
3773 CY_UNLOCK(info, flags);
3774 }
3775 } else {
3776 return -ENODEV;
3777 }
3778 CY_LOCK(info, flags);
3779 retval = cyz_issue_cmd(info->card,
3780 channel, C_CM_IOCTLM, 0L);
3781 if (retval != 0) {
3782 printk(KERN_ERR "cyc:set_modem_info retval on ttyC%d "
3783 "was %x\n", info->line, retval);
3784 }
3785 CY_UNLOCK(info, flags);
3786 }
3787 return 0;
3788} /* cy_tiocmset */
3789
3790/*
3791 * cy_break() --- routine which turns the break handling on or off
3792 */
3793static void cy_break(struct tty_struct *tty, int break_state)
3794{
3795 struct cyclades_port *info = tty->driver_data;
3796 unsigned long flags;
3797
3798 if (serial_paranoia_check(info, tty->name, "cy_break"))
3799 return;
3800
3801 CY_LOCK(info, flags);
3802 if (!IS_CYC_Z(*info->card)) {
3803 /* Let the transmit ISR take care of this (since it
3804 requires stuffing characters into the output stream).
3805 */
3806 if (break_state == -1) {
3807 if (!info->breakon) {
3808 info->breakon = 1;
3809 if (!info->xmit_cnt) {
3810 CY_UNLOCK(info, flags);
3811 start_xmit(info);
3812 CY_LOCK(info, flags);
3813 }
3814 }
3815 } else {
3816 if (!info->breakoff) {
3817 info->breakoff = 1;
3818 if (!info->xmit_cnt) {
3819 CY_UNLOCK(info, flags);
3820 start_xmit(info);
3821 CY_LOCK(info, flags);
3822 }
3823 }
3824 }
3825 } else {
3826 int retval;
3827
3828 if (break_state == -1) {
3829 retval = cyz_issue_cmd(info->card,
3830 info->line - info->card->first_line,
3831 C_CM_SET_BREAK, 0L);
3832 if (retval != 0) {
3833 printk(KERN_ERR "cyc:cy_break (set) retval on "
3834 "ttyC%d was %x\n", info->line, retval);
3835 }
3836 } else {
3837 retval = cyz_issue_cmd(info->card,
3838 info->line - info->card->first_line,
3839 C_CM_CLR_BREAK, 0L);
3840 if (retval != 0) {
3841 printk(KERN_DEBUG "cyc:cy_break (clr) retval "
3842 "on ttyC%d was %x\n", info->line,
3843 retval);
3844 }
3845 }
3846 }
3847 CY_UNLOCK(info, flags);
3848} /* cy_break */
3849
3850static int
3851get_mon_info(struct cyclades_port *info, struct cyclades_monitor __user * mon)
3852{
3853
3854 if (copy_to_user(mon, &info->mon, sizeof(struct cyclades_monitor)))
3855 return -EFAULT;
3856 info->mon.int_count = 0;
3857 info->mon.char_count = 0;
3858 info->mon.char_max = 0;
3859 info->mon.char_last = 0;
3860 return 0;
3861} /* get_mon_info */
3862
3863static int set_threshold(struct cyclades_port *info, unsigned long value)
3864{
3865 struct cyclades_card *card;
3866 void __iomem *base_addr;
3867 int channel, chip, index;
3868 unsigned long flags;
3869
3870 card = info->card;
3871 channel = info->line - card->first_line;
3872 if (!IS_CYC_Z(*card)) {
3873 chip = channel >> 2;
3874 channel &= 0x03;
3875 index = card->bus_index;
3876 base_addr =
3877 card->base_addr + (cy_chip_offset[chip] << index);
3878
3879 info->cor3 &= ~CyREC_FIFO;
3880 info->cor3 |= value & CyREC_FIFO;
3881
3882 CY_LOCK(info, flags);
3883 cy_writeb(base_addr + (CyCOR3 << index), info->cor3);
3884 cyy_issue_cmd(base_addr, CyCOR_CHANGE | CyCOR3ch, index);
3885 CY_UNLOCK(info, flags);
3886 } else {
3887 /* Nothing to do! */
3888 }
3889 return 0;
3890} /* set_threshold */
3891
3892static int
3893get_threshold(struct cyclades_port *info, unsigned long __user * value)
3894{
3895 struct cyclades_card *card;
3896 void __iomem *base_addr;
3897 int channel, chip, index;
3898 unsigned long tmp;
3899
3900 card = info->card;
3901 channel = info->line - card->first_line;
3902 if (!IS_CYC_Z(*card)) {
3903 chip = channel >> 2;
3904 channel &= 0x03;
3905 index = card->bus_index;
3906 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3907
3908 tmp = readb(base_addr + (CyCOR3 << index)) & CyREC_FIFO;
3909 return put_user(tmp, value);
3910 } else {
3911 /* Nothing to do! */
3912 return 0;
3913 }
3914} /* get_threshold */
3915
3916static int
3917set_default_threshold(struct cyclades_port *info, unsigned long value)
3918{
3919 info->default_threshold = value & 0x0f;
3920 return 0;
3921} /* set_default_threshold */
3922
3923static int
3924get_default_threshold(struct cyclades_port *info, unsigned long __user * value)
3925{
3926 return put_user(info->default_threshold, value);
3927} /* get_default_threshold */
3928
3929static int set_timeout(struct cyclades_port *info, unsigned long value)
3930{
3931 struct cyclades_card *card;
3932 void __iomem *base_addr;
3933 int channel, chip, index;
3934 unsigned long flags;
3935
3936 card = info->card;
3937 channel = info->line - card->first_line;
3938 if (!IS_CYC_Z(*card)) {
3939 chip = channel >> 2;
3940 channel &= 0x03;
3941 index = card->bus_index;
3942 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3943
3944 CY_LOCK(info, flags);
3945 cy_writeb(base_addr + (CyRTPR << index), value & 0xff);
3946 CY_UNLOCK(info, flags);
3947 } else {
3948 /* Nothing to do! */
3949 }
3950 return 0;
3951} /* set_timeout */
3952
3953static int get_timeout(struct cyclades_port *info, unsigned long __user * value)
3954{
3955 struct cyclades_card *card;
3956 void __iomem *base_addr;
3957 int channel, chip, index;
3958 unsigned long tmp;
3959
3960 card = info->card;
3961 channel = info->line - card->first_line;
3962 if (!IS_CYC_Z(*card)) {
3963 chip = channel >> 2;
3964 channel &= 0x03;
3965 index = card->bus_index;
3966 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3967
3968 tmp = readb(base_addr + (CyRTPR << index));
3969 return put_user(tmp, value);
3970 } else {
3971 /* Nothing to do! */
3972 return 0;
3973 }
3974} /* get_timeout */
3975
3976static int set_default_timeout(struct cyclades_port *info, unsigned long value)
3977{
3978 info->default_timeout = value & 0xff;
3979 return 0;
3980} /* set_default_timeout */
3981
3982static int
3983get_default_timeout(struct cyclades_port *info, unsigned long __user * value)
3984{
3985 return put_user(info->default_timeout, value);
3986} /* get_default_timeout */
3987
3988/*
3989 * This routine allows the tty driver to implement device-
3990 * specific ioctl's. If the ioctl number passed in cmd is
3991 * not recognized by the driver, it should return ENOIOCTLCMD.
3992 */
3993static int
3994cy_ioctl(struct tty_struct *tty, struct file *file,
3995 unsigned int cmd, unsigned long arg)
3996{
3997 struct cyclades_port *info = tty->driver_data;
3998 struct cyclades_icount cprev, cnow; /* kernel counter temps */
3999 struct serial_icounter_struct __user *p_cuser; /* user space */
4000 int ret_val = 0;
4001 unsigned long flags;
4002 void __user *argp = (void __user *)arg;
4003
4004 if (serial_paranoia_check(info, tty->name, "cy_ioctl"))
4005 return -ENODEV;
4006
4007#ifdef CY_DEBUG_OTHER
4008 printk(KERN_DEBUG "cyc:cy_ioctl ttyC%d, cmd = %x arg = %lx\n",
4009 info->line, cmd, arg);
4010#endif
4011
4012 switch (cmd) {
4013 case CYGETMON:
4014 ret_val = get_mon_info(info, argp);
4015 break;
4016 case CYGETTHRESH:
4017 ret_val = get_threshold(info, argp);
4018 break;
4019 case CYSETTHRESH:
4020 ret_val = set_threshold(info, arg);
4021 break;
4022 case CYGETDEFTHRESH:
4023 ret_val = get_default_threshold(info, argp);
4024 break;
4025 case CYSETDEFTHRESH:
4026 ret_val = set_default_threshold(info, arg);
4027 break;
4028 case CYGETTIMEOUT:
4029 ret_val = get_timeout(info, argp);
4030 break;
4031 case CYSETTIMEOUT:
4032 ret_val = set_timeout(info, arg);
4033 break;
4034 case CYGETDEFTIMEOUT:
4035 ret_val = get_default_timeout(info, argp);
4036 break;
4037 case CYSETDEFTIMEOUT:
4038 ret_val = set_default_timeout(info, arg);
4039 break;
4040 case CYSETRFLOW:
4041 info->rflow = (int)arg;
4042 ret_val = 0;
4043 break;
4044 case CYGETRFLOW:
4045 ret_val = info->rflow;
4046 break;
4047 case CYSETRTSDTR_INV:
4048 info->rtsdtr_inv = (int)arg;
4049 ret_val = 0;
4050 break;
4051 case CYGETRTSDTR_INV:
4052 ret_val = info->rtsdtr_inv;
4053 break;
4054 case CYGETCD1400VER:
4055 ret_val = info->chip_rev;
4056 break;
4057#ifndef CONFIG_CYZ_INTR
4058 case CYZSETPOLLCYCLE:
4059 cyz_polling_cycle = (arg * HZ) / 1000;
4060 ret_val = 0;
4061 break;
4062 case CYZGETPOLLCYCLE:
4063 ret_val = (cyz_polling_cycle * 1000) / HZ;
4064 break;
4065#endif /* CONFIG_CYZ_INTR */
4066 case CYSETWAIT:
4067 info->closing_wait = (unsigned short)arg *HZ / 100;
4068 ret_val = 0;
4069 break;
4070 case CYGETWAIT:
4071 ret_val = info->closing_wait / (HZ / 100);
4072 break;
4073 case TIOCGSERIAL:
4074 ret_val = get_serial_info(info, argp);
4075 break;
4076 case TIOCSSERIAL:
4077 ret_val = set_serial_info(info, argp);
4078 break;
4079 case TIOCSERGETLSR: /* Get line status register */
4080 ret_val = get_lsr_info(info, argp);
4081 break;
4082 /*
4083 * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
4084 * - mask passed in arg for lines of interest
4085 * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
4086 * Caller should use TIOCGICOUNT to see which one it was
4087 */
4088 case TIOCMIWAIT:
4089 CY_LOCK(info, flags);
4090 /* note the counters on entry */
4091 cnow = info->icount;
4092 CY_UNLOCK(info, flags);
4093 ret_val = wait_event_interruptible(info->delta_msr_wait, ({
4094 cprev = cnow;
4095 CY_LOCK(info, flags);
4096 cnow = info->icount; /* atomic copy */
4097 CY_UNLOCK(info, flags);
4098
4099 ((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
4100 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
4101 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) ||
4102 ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts));
4103 }));
4104 break;
4105
4106 /*
4107 * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
4108 * Return: write counters to the user passed counter struct
4109 * NB: both 1->0 and 0->1 transitions are counted except for
4110 * RI where only 0->1 is counted.
4111 */
4112 case TIOCGICOUNT:
4113 CY_LOCK(info, flags);
4114 cnow = info->icount;
4115 CY_UNLOCK(info, flags);
4116 p_cuser = argp;
4117 ret_val = put_user(cnow.cts, &p_cuser->cts);
4118 if (ret_val)
4119 return ret_val;
4120 ret_val = put_user(cnow.dsr, &p_cuser->dsr);
4121 if (ret_val)
4122 return ret_val;
4123 ret_val = put_user(cnow.rng, &p_cuser->rng);
4124 if (ret_val)
4125 return ret_val;
4126 ret_val = put_user(cnow.dcd, &p_cuser->dcd);
4127 if (ret_val)
4128 return ret_val;
4129 ret_val = put_user(cnow.rx, &p_cuser->rx);
4130 if (ret_val)
4131 return ret_val;
4132 ret_val = put_user(cnow.tx, &p_cuser->tx);
4133 if (ret_val)
4134 return ret_val;
4135 ret_val = put_user(cnow.frame, &p_cuser->frame);
4136 if (ret_val)
4137 return ret_val;
4138 ret_val = put_user(cnow.overrun, &p_cuser->overrun);
4139 if (ret_val)
4140 return ret_val;
4141 ret_val = put_user(cnow.parity, &p_cuser->parity);
4142 if (ret_val)
4143 return ret_val;
4144 ret_val = put_user(cnow.brk, &p_cuser->brk);
4145 if (ret_val)
4146 return ret_val;
4147 ret_val = put_user(cnow.buf_overrun, &p_cuser->buf_overrun);
4148 if (ret_val)
4149 return ret_val;
4150 ret_val = 0;
4151 break;
4152 default:
4153 ret_val = -ENOIOCTLCMD;
4154 }
4155
4156#ifdef CY_DEBUG_OTHER
4157 printk(KERN_DEBUG "cyc:cy_ioctl done\n");
4158#endif
4159
4160 return ret_val;
4161} /* cy_ioctl */
4162
4163/*
4164 * This routine allows the tty driver to be notified when
4165 * device's termios settings have changed. Note that a
4166 * well-designed tty driver should be prepared to accept the case
4167 * where old == NULL, and try to do something rational.
4168 */
4169static void cy_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
4170{
4171 struct cyclades_port *info = tty->driver_data;
4172
4173#ifdef CY_DEBUG_OTHER
4174 printk(KERN_DEBUG "cyc:cy_set_termios ttyC%d\n", info->line);
4175#endif
4176
4177 if (tty->termios->c_cflag == old_termios->c_cflag &&
4178 (tty->termios->c_iflag & (IXON | IXANY)) ==
4179 (old_termios->c_iflag & (IXON | IXANY)))
4180 return;
4181 set_line_char(info);
4182
4183 if ((old_termios->c_cflag & CRTSCTS) &&
4184 !(tty->termios->c_cflag & CRTSCTS)) {
4185 tty->hw_stopped = 0;
4186 cy_start(tty);
4187 }
4188#if 0
4189 /*
4190 * No need to wake up processes in open wait, since they
4191 * sample the CLOCAL flag once, and don't recheck it.
4192 * XXX It's not clear whether the current behavior is correct
4193 * or not. Hence, this may change.....
4194 */
4195 if (!(old_termios->c_cflag & CLOCAL) &&
4196 (tty->termios->c_cflag & CLOCAL))
4197 wake_up_interruptible(&info->open_wait);
4198#endif
4199} /* cy_set_termios */
4200
4201/* This function is used to send a high-priority XON/XOFF character to
4202 the device.
4203*/
4204static void cy_send_xchar(struct tty_struct *tty, char ch)
4205{
4206 struct cyclades_port *info = tty->driver_data;
4207 struct cyclades_card *card;
4208 int channel;
4209
4210 if (serial_paranoia_check(info, tty->name, "cy_send_xchar"))
4211 return;
4212
4213 info->x_char = ch;
4214
4215 if (ch)
4216 cy_start(tty);
4217
4218 card = info->card;
4219 channel = info->line - card->first_line;
4220
4221 if (IS_CYC_Z(*card)) {
4222 if (ch == STOP_CHAR(tty))
4223 cyz_issue_cmd(card, channel, C_CM_SENDXOFF, 0L);
4224 else if (ch == START_CHAR(tty))
4225 cyz_issue_cmd(card, channel, C_CM_SENDXON, 0L);
4226 }
4227}
4228
4229/* This routine is called by the upper-layer tty layer to signal
4230 that incoming characters should be throttled because the input
4231 buffers are close to full.
4232 */
4233static void cy_throttle(struct tty_struct *tty)
4234{
4235 struct cyclades_port *info = tty->driver_data;
4236 struct cyclades_card *card;
4237 unsigned long flags;
4238 void __iomem *base_addr;
4239 int chip, channel, index;
4240
4241#ifdef CY_DEBUG_THROTTLE
4242 char buf[64];
4243
4244 printk(KERN_DEBUG "cyc:throttle %s: %ld...ttyC%d\n", tty_name(tty, buf),
4245 tty->ldisc.chars_in_buffer(tty), info->line);
4246#endif
4247
4248 if (serial_paranoia_check(info, tty->name, "cy_throttle")) {
4249 return;
4250 }
4251
4252 card = info->card;
4253
4254 if (I_IXOFF(tty)) {
4255 if (!IS_CYC_Z(*card))
4256 cy_send_xchar(tty, STOP_CHAR(tty));
4257 else
4258 info->throttle = 1;
4259 }
4260
4261 if (tty->termios->c_cflag & CRTSCTS) {
4262 channel = info->line - card->first_line;
4263 if (!IS_CYC_Z(*card)) {
4264 chip = channel >> 2;
4265 channel &= 0x03;
4266 index = card->bus_index;
4267 base_addr = card->base_addr +
4268 (cy_chip_offset[chip] << index);
4269
4270 CY_LOCK(info, flags);
4271 cy_writeb(base_addr + (CyCAR << index),
4272 (u_char) channel);
4273 if (info->rtsdtr_inv) {
4274 cy_writeb(base_addr + (CyMSVR2 << index),
4275 ~CyDTR);
4276 } else {
4277 cy_writeb(base_addr + (CyMSVR1 << index),
4278 ~CyRTS);
4279 }
4280 CY_UNLOCK(info, flags);
4281 } else {
4282 info->throttle = 1;
4283 }
4284 }
4285} /* cy_throttle */
4286
4287/*
4288 * This routine notifies the tty driver that it should signal
4289 * that characters can now be sent to the tty without fear of
4290 * overrunning the input buffers of the line disciplines.
4291 */
4292static void cy_unthrottle(struct tty_struct *tty)
4293{
4294 struct cyclades_port *info = tty->driver_data;
4295 struct cyclades_card *card;
4296 unsigned long flags;
4297 void __iomem *base_addr;
4298 int chip, channel, index;
4299
4300#ifdef CY_DEBUG_THROTTLE
4301 char buf[64];
4302
4303 printk(KERN_DEBUG "cyc:unthrottle %s: %ld...ttyC%d\n",
4304 tty_name(tty, buf), tty->ldisc.chars_in_buffer(tty),info->line);
4305#endif
4306
4307 if (serial_paranoia_check(info, tty->name, "cy_unthrottle")) {
4308 return;
4309 }
4310
4311 if (I_IXOFF(tty)) {
4312 if (info->x_char)
4313 info->x_char = 0;
4314 else
4315 cy_send_xchar(tty, START_CHAR(tty));
4316 }
4317
4318 if (tty->termios->c_cflag & CRTSCTS) {
4319 card = info->card;
4320 channel = info->line - card->first_line;
4321 if (!IS_CYC_Z(*card)) {
4322 chip = channel >> 2;
4323 channel &= 0x03;
4324 index = card->bus_index;
4325 base_addr = card->base_addr +
4326 (cy_chip_offset[chip] << index);
4327
4328 CY_LOCK(info, flags);
4329 cy_writeb(base_addr + (CyCAR << index),
4330 (u_char) channel);
4331 if (info->rtsdtr_inv) {
4332 cy_writeb(base_addr + (CyMSVR2 << index),
4333 CyDTR);
4334 } else {
4335 cy_writeb(base_addr + (CyMSVR1 << index),
4336 CyRTS);
4337 }
4338 CY_UNLOCK(info, flags);
4339 } else {
4340 info->throttle = 0;
4341 }
4342 }
4343} /* cy_unthrottle */
4344
4345/* cy_start and cy_stop provide software output flow control as a
4346 function of XON/XOFF, software CTS, and other such stuff.
4347*/
4348static void cy_stop(struct tty_struct *tty)
4349{
4350 struct cyclades_card *cinfo;
4351 struct cyclades_port *info = tty->driver_data;
4352 void __iomem *base_addr;
4353 int chip, channel, index;
4354 unsigned long flags;
4355
4356#ifdef CY_DEBUG_OTHER
4357 printk(KERN_DEBUG "cyc:cy_stop ttyC%d\n", info->line);
4358#endif
4359
4360 if (serial_paranoia_check(info, tty->name, "cy_stop"))
4361 return;
4362
4363 cinfo = info->card;
4364 channel = info->line - cinfo->first_line;
4365 if (!IS_CYC_Z(*cinfo)) {
4366 index = cinfo->bus_index;
4367 chip = channel >> 2;
4368 channel &= 0x03;
4369 base_addr = info->card->base_addr +
4370 (cy_chip_offset[chip] << index);
4371
4372 CY_LOCK(info, flags);
4373 cy_writeb(base_addr + (CyCAR << index),
4374 (u_char)(channel & 0x0003)); /* index channel */
4375 cy_writeb(base_addr + (CySRER << index),
4376 readb(base_addr + (CySRER << index)) & ~CyTxRdy);
4377 CY_UNLOCK(info, flags);
4378 } else {
4379 /* Nothing to do! */
4380 }
4381} /* cy_stop */
4382
4383static void cy_start(struct tty_struct *tty)
4384{
4385 struct cyclades_card *cinfo;
4386 struct cyclades_port *info = tty->driver_data;
4387 void __iomem *base_addr;
4388 int chip, channel, index;
4389 unsigned long flags;
4390
4391#ifdef CY_DEBUG_OTHER
4392 printk(KERN_DEBUG "cyc:cy_start ttyC%d\n", info->line);
4393#endif
4394
4395 if (serial_paranoia_check(info, tty->name, "cy_start"))
4396 return;
4397
4398 cinfo = info->card;
4399 channel = info->line - cinfo->first_line;
4400 index = cinfo->bus_index;
4401 if (!IS_CYC_Z(*cinfo)) {
4402 chip = channel >> 2;
4403 channel &= 0x03;
4404 base_addr = info->card->base_addr +
4405 (cy_chip_offset[chip] << index);
4406
4407 CY_LOCK(info, flags);
4408 cy_writeb(base_addr + (CyCAR << index), (u_char) (channel & 0x0003)); /* index channel */
4409 cy_writeb(base_addr + (CySRER << index),
4410 readb(base_addr + (CySRER << index)) | CyTxRdy);
4411 CY_UNLOCK(info, flags);
4412 } else {
4413 /* Nothing to do! */
4414 }
4415} /* cy_start */
4416
4417static void cy_flush_buffer(struct tty_struct *tty)
4418{
4419 struct cyclades_port *info = tty->driver_data;
4420 struct cyclades_card *card;
4421 int channel, retval;
4422 unsigned long flags;
4423
4424#ifdef CY_DEBUG_IO
4425 printk(KERN_DEBUG "cyc:cy_flush_buffer ttyC%d\n", info->line);
4426#endif
4427
4428 if (serial_paranoia_check(info, tty->name, "cy_flush_buffer"))
4429 return;
4430
4431 card = info->card;
4432 channel = info->line - card->first_line;
4433
4434 CY_LOCK(info, flags);
4435 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
4436 CY_UNLOCK(info, flags);
4437
4438 if (IS_CYC_Z(*card)) { /* If it is a Z card, flush the on-board
4439 buffers as well */
4440 CY_LOCK(info, flags);
4441 retval = cyz_issue_cmd(card, channel, C_CM_FLUSH_TX, 0L);
4442 if (retval != 0) {
4443 printk(KERN_ERR "cyc: flush_buffer retval on ttyC%d "
4444 "was %x\n", info->line, retval);
4445 }
4446 CY_UNLOCK(info, flags);
4447 }
4448 tty_wakeup(tty);
4449} /* cy_flush_buffer */
4450
4451/*
4452 * cy_hangup() --- called by tty_hangup() when a hangup is signaled.
4453 */
4454static void cy_hangup(struct tty_struct *tty)
4455{
4456 struct cyclades_port *info = tty->driver_data;
4457
4458#ifdef CY_DEBUG_OTHER
4459 printk(KERN_DEBUG "cyc:cy_hangup ttyC%d\n", info->line);
4460#endif
4461
4462 if (serial_paranoia_check(info, tty->name, "cy_hangup"))
4463 return;
4464
4465 cy_flush_buffer(tty);
4466 shutdown(info);
4467 info->event = 0;
4468 info->count = 0;
4469#ifdef CY_DEBUG_COUNT
4470 printk(KERN_DEBUG "cyc:cy_hangup (%d): setting count to 0\n",
4471 current->pid);
4472#endif
4473 info->tty = NULL;
4474 info->flags &= ~ASYNC_NORMAL_ACTIVE;
4475 wake_up_interruptible(&info->open_wait);
4476} /* cy_hangup */
4477
4478/*
4479 * ---------------------------------------------------------------------
4480 * cy_init() and friends
4481 *
4482 * cy_init() is called at boot-time to initialize the serial driver.
4483 * ---------------------------------------------------------------------
4484 */
4485
4486static void __devinit cy_init_card(struct cyclades_card *cinfo)
4487{
4488 struct cyclades_port *info;
4489 u32 mailbox;
4490 unsigned int nports;
4491 unsigned short chip_number;
4492 int index, port;
4493
4494 spin_lock_init(&cinfo->card_lock);
4495
4496 if (IS_CYC_Z(*cinfo)) { /* Cyclades-Z */
4497 mailbox = readl(&((struct RUNTIME_9060 __iomem *)
4498 cinfo->ctl_addr)->mail_box_0);
4499 nports = (mailbox == ZE_V1) ? ZE_V1_NPORTS : 8;
4500 cinfo->intr_enabled = 0;
4501 cinfo->nports = 0; /* Will be correctly set later, after
4502 Z FW is loaded */
4503 } else {
4504 index = cinfo->bus_index;
4505 nports = cinfo->nports = CyPORTS_PER_CHIP * cinfo->num_chips;
4506 }
4507
4508 for (port = cinfo->first_line; port < cinfo->first_line + nports;
4509 port++) {
4510 info = &cy_port[port];
4511 memset(info, 0, sizeof(*info));
4512 info->magic = CYCLADES_MAGIC;
4513 info->card = cinfo;
4514 info->line = port;
4515 info->flags = STD_COM_FLAGS;
4516 info->closing_wait = CLOSING_WAIT_DELAY;
4517 info->close_delay = 5 * HZ / 10;
4518
4519 INIT_WORK(&info->tqueue, do_softint);
4520 init_waitqueue_head(&info->open_wait);
4521 init_waitqueue_head(&info->close_wait);
4522 init_completion(&info->shutdown_wait);
4523 init_waitqueue_head(&info->delta_msr_wait);
4524
4525 if (IS_CYC_Z(*cinfo)) {
4526 info->type = PORT_STARTECH;
4527 if (mailbox == ZO_V1)
4528 info->xmit_fifo_size = CYZ_FIFO_SIZE;
4529 else
4530 info->xmit_fifo_size = 4 * CYZ_FIFO_SIZE;
4531#ifdef CONFIG_CYZ_INTR
4532 init_timer(&cyz_rx_full_timer[port]);
4533 cyz_rx_full_timer[port].function = NULL;
4534#endif
4535 } else {
4536 info->type = PORT_CIRRUS;
4537 info->xmit_fifo_size = CyMAX_CHAR_FIFO;
4538 info->cor1 = CyPARITY_NONE | Cy_1_STOP | Cy_8_BITS;
4539 info->cor2 = CyETC;
4540 info->cor3 = 0x08; /* _very_ small rcv threshold */
4541
4542 chip_number = (port - cinfo->first_line) / 4;
4543 if ((info->chip_rev = readb(cinfo->base_addr +
4544 (cy_chip_offset[chip_number] <<
4545 index) + (CyGFRCR << index))) >=
4546 CD1400_REV_J) {
4547 /* It is a CD1400 rev. J or later */
4548 info->tbpr = baud_bpr_60[13]; /* Tx BPR */
4549 info->tco = baud_co_60[13]; /* Tx CO */
4550 info->rbpr = baud_bpr_60[13]; /* Rx BPR */
4551 info->rco = baud_co_60[13]; /* Rx CO */
4552 info->rtsdtr_inv = 1;
4553 } else {
4554 info->tbpr = baud_bpr_25[13]; /* Tx BPR */
4555 info->tco = baud_co_25[13]; /* Tx CO */
4556 info->rbpr = baud_bpr_25[13]; /* Rx BPR */
4557 info->rco = baud_co_25[13]; /* Rx CO */
4558 info->rtsdtr_inv = 0;
4559 }
4560 info->read_status_mask = CyTIMEOUT | CySPECHAR |
4561 CyBREAK | CyPARITY | CyFRAME | CyOVERRUN;
4562 }
4563
4564 }
4565
4566#ifndef CONFIG_CYZ_INTR
4567 if (IS_CYC_Z(*cinfo) && !timer_pending(&cyz_timerlist)) {
4568 mod_timer(&cyz_timerlist, jiffies + 1);
4569#ifdef CY_PCI_DEBUG
4570 printk(KERN_DEBUG "Cyclades-Z polling initialized\n");
4571#endif
4572 }
4573#endif
4574}
4575
4576/* initialize chips on Cyclom-Y card -- return number of valid
4577 chips (which is number of ports/4) */
4578static unsigned short __devinit cyy_init_card(void __iomem *true_base_addr,
4579 int index)
4580{
4581 unsigned int chip_number;
4582 void __iomem *base_addr;
4583
4584 cy_writeb(true_base_addr + (Cy_HwReset << index), 0);
4585 /* Cy_HwReset is 0x1400 */
4586 cy_writeb(true_base_addr + (Cy_ClrIntr << index), 0);
4587 /* Cy_ClrIntr is 0x1800 */
4588 udelay(500L);
4589
4590 for (chip_number = 0; chip_number < CyMAX_CHIPS_PER_CARD; chip_number++) {
4591 base_addr =
4592 true_base_addr + (cy_chip_offset[chip_number] << index);
4593 mdelay(1);
4594 if (readb(base_addr + (CyCCR << index)) != 0x00) {
4595 /*************
4596 printk(" chip #%d at %#6lx is never idle (CCR != 0)\n",
4597 chip_number, (unsigned long)base_addr);
4598 *************/
4599 return chip_number;
4600 }
4601
4602 cy_writeb(base_addr + (CyGFRCR << index), 0);
4603 udelay(10L);
4604
4605 /* The Cyclom-16Y does not decode address bit 9 and therefore
4606 cannot distinguish between references to chip 0 and a non-
4607 existent chip 4. If the preceding clearing of the supposed
4608 chip 4 GFRCR register appears at chip 0, there is no chip 4
4609 and this must be a Cyclom-16Y, not a Cyclom-32Ye.
4610 */
4611 if (chip_number == 4 && readb(true_base_addr +
4612 (cy_chip_offset[0] << index) +
4613 (CyGFRCR << index)) == 0) {
4614 return chip_number;
4615 }
4616
4617 cy_writeb(base_addr + (CyCCR << index), CyCHIP_RESET);
4618 mdelay(1);
4619
4620 if (readb(base_addr + (CyGFRCR << index)) == 0x00) {
4621 /*
4622 printk(" chip #%d at %#6lx is not responding ",
4623 chip_number, (unsigned long)base_addr);
4624 printk("(GFRCR stayed 0)\n",
4625 */
4626 return chip_number;
4627 }
4628 if ((0xf0 & (readb(base_addr + (CyGFRCR << index)))) !=
4629 0x40) {
4630 /*
4631 printk(" chip #%d at %#6lx is not valid (GFRCR == "
4632 "%#2x)\n",
4633 chip_number, (unsigned long)base_addr,
4634 base_addr[CyGFRCR<<index]);
4635 */
4636 return chip_number;
4637 }
4638 cy_writeb(base_addr + (CyGCR << index), CyCH0_SERIAL);
4639 if (readb(base_addr + (CyGFRCR << index)) >= CD1400_REV_J) {
4640 /* It is a CD1400 rev. J or later */
4641 /* Impossible to reach 5ms with this chip.
4642 Changed to 2ms instead (f = 500 Hz). */
4643 cy_writeb(base_addr + (CyPPR << index), CyCLOCK_60_2MS);
4644 } else {
4645 /* f = 200 Hz */
4646 cy_writeb(base_addr + (CyPPR << index), CyCLOCK_25_5MS);
4647 }
4648
4649 /*
4650 printk(" chip #%d at %#6lx is rev 0x%2x\n",
4651 chip_number, (unsigned long)base_addr,
4652 readb(base_addr+(CyGFRCR<<index)));
4653 */
4654 }
4655 return chip_number;
4656} /* cyy_init_card */
4657
4658/*
4659 * ---------------------------------------------------------------------
4660 * cy_detect_isa() - Probe for Cyclom-Y/ISA boards.
4661 * sets global variables and return the number of ISA boards found.
4662 * ---------------------------------------------------------------------
4663 */
4664static int __init cy_detect_isa(void)
4665{
4666#ifdef CONFIG_ISA
4667 unsigned short cy_isa_irq, nboard;
4668 void __iomem *cy_isa_address;
4669 unsigned short i, j, cy_isa_nchan;
4670#ifdef MODULE
4671 int isparam = 0;
4672#endif
4673
4674 nboard = 0;
4675
4676#ifdef MODULE
4677 /* Check for module parameters */
4678 for (i = 0; i < NR_CARDS; i++) {
4679 if (maddr[i] || i) {
4680 isparam = 1;
4681 cy_isa_addresses[i] = maddr[i];
4682 }
4683 if (!maddr[i])
4684 break;
4685 }
4686#endif
4687
4688 /* scan the address table probing for Cyclom-Y/ISA boards */
4689 for (i = 0; i < NR_ISA_ADDRS; i++) {
4690 unsigned int isa_address = cy_isa_addresses[i];
4691 if (isa_address == 0x0000) {
4692 return nboard;
4693 }
4694
4695 /* probe for CD1400... */
4696 cy_isa_address = ioremap(isa_address, CyISA_Ywin);
4697 cy_isa_nchan = CyPORTS_PER_CHIP *
4698 cyy_init_card(cy_isa_address, 0);
4699 if (cy_isa_nchan == 0) {
4700 continue;
4701 }
4702#ifdef MODULE
4703 if (isparam && irq[i])
4704 cy_isa_irq = irq[i];
4705 else
4706#endif
4707 /* find out the board's irq by probing */
4708 cy_isa_irq = detect_isa_irq(cy_isa_address);
4709 if (cy_isa_irq == 0) {
4710 printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but the "
4711 "IRQ could not be detected.\n",
4712 (unsigned long)cy_isa_address);
4713 continue;
4714 }
4715
4716 if ((cy_next_channel + cy_isa_nchan) > NR_PORTS) {
4717 printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but no "
4718 "more channels are available. Change NR_PORTS "
4719 "in cyclades.c and recompile kernel.\n",
4720 (unsigned long)cy_isa_address);
4721 return nboard;
4722 }
4723 /* fill the next cy_card structure available */
4724 for (j = 0; j < NR_CARDS; j++) {
4725 if (cy_card[j].base_addr == 0)
4726 break;
4727 }
4728 if (j == NR_CARDS) { /* no more cy_cards available */
4729 printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but no "
4730 "more cards can be used. Change NR_CARDS in "
4731 "cyclades.c and recompile kernel.\n",
4732 (unsigned long)cy_isa_address);
4733 return nboard;
4734 }
4735
4736 /* allocate IRQ */
4737 if (request_irq(cy_isa_irq, cyy_interrupt,
4738 IRQF_DISABLED, "Cyclom-Y", &cy_card[j])) {
4739 printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but "
4740 "could not allocate IRQ#%d.\n",
4741 (unsigned long)cy_isa_address, cy_isa_irq);
4742 return nboard;
4743 }
4744
4745 /* set cy_card */
4746 cy_card[j].base_addr = cy_isa_address;
4747 cy_card[j].ctl_addr = NULL;
4748 cy_card[j].irq = (int)cy_isa_irq;
4749 cy_card[j].bus_index = 0;
4750 cy_card[j].first_line = cy_next_channel;
4751 cy_card[j].num_chips = cy_isa_nchan / 4;
4752 cy_init_card(&cy_card[j]);
4753 nboard++;
4754
4755 printk(KERN_INFO "Cyclom-Y/ISA #%d: 0x%lx-0x%lx, IRQ%d found: "
4756 "%d channels starting from port %d\n",
4757 j + 1, (unsigned long)cy_isa_address,
4758 (unsigned long)(cy_isa_address + (CyISA_Ywin - 1)),
4759 cy_isa_irq, cy_isa_nchan, cy_next_channel);
4760
4761 for (j = cy_next_channel;
4762 j < cy_next_channel + cy_isa_nchan; j++)
4763 tty_register_device(cy_serial_driver, j, NULL);
4764 cy_next_channel += cy_isa_nchan;
4765 }
4766 return nboard;
4767#else
4768 return 0;
4769#endif /* CONFIG_ISA */
4770} /* cy_detect_isa */
4771
4772#ifdef CONFIG_PCI
4773static void __devinit plx_init(void __iomem * addr, __u32 initctl)
4774{
4775 /* Reset PLX */
4776 cy_writel(addr + initctl, readl(addr + initctl) | 0x40000000);
4777 udelay(100L);
4778 cy_writel(addr + initctl, readl(addr + initctl) & ~0x40000000);
4779
4780 /* Reload Config. Registers from EEPROM */
4781 cy_writel(addr + initctl, readl(addr + initctl) | 0x20000000);
4782 udelay(100L);
4783 cy_writel(addr + initctl, readl(addr + initctl) & ~0x20000000);
4784}
4785
4786static int __devinit cy_init_Ze(struct RUNTIME_9060 __iomem *cy_pci_addr0,
4787 int cy_pci_irq, struct pci_dev *pdev)
4788{
4789 void __iomem *cy_pci_addr2;
4790 unsigned int j;
4791 unsigned short cy_pci_nchan;
4792
4793 cy_pci_addr2 = pci_iomap(pdev, 2, CyPCI_Ze_win);
4794
4795 readl(&cy_pci_addr0->mail_box_0);
4796 dev_dbg(&pdev->dev, "new Cyclades-Z board. FPGA not loaded\n");
4797
4798 /* This must be the new Cyclades-Ze/PCI. */
4799 cy_pci_nchan = ZE_V1_NPORTS;
4800
4801 if ((cy_next_channel + cy_pci_nchan) > NR_PORTS) {
4802 dev_err(&pdev->dev, "Cyclades-Ze/PCI found, but no channels "
4803 "are available.\nChange NR_PORTS in cyclades.c "
4804 "and recompile kernel.\n");
4805 return -EIO;
4806 }
4807
4808 /* fill the next cy_card structure available */
4809 for (j = 0; j < NR_CARDS; j++) {
4810 if (cy_card[j].base_addr == 0)
4811 break;
4812 }
4813 if (j == NR_CARDS) { /* no more cy_cards available */
4814 dev_err(&pdev->dev, "Cyclades-Ze/PCI found, but no more "
4815 "cards can be used.\nChange NR_CARDS in "
4816 "cyclades.c and recompile kernel.\n");
4817 return -EIO;
4818 }
4819#ifdef CONFIG_CYZ_INTR
4820 /* allocate IRQ only if board has an IRQ */
4821 if ((cy_pci_irq != 0) && (cy_pci_irq != 255)) {
4822 if (request_irq(cy_pci_irq, cyz_interrupt,
4823 IRQF_SHARED, "Cyclades-Z",
4824 &cy_card[j])) {
4825 dev_err(&pdev->dev, "could not allocate IRQ.\n");
4826 return -EIO;
4827 }
4828 }
4829#endif /* CONFIG_CYZ_INTR */
4830
4831 /* set cy_card */
4832 cy_card[j].base_addr = cy_pci_addr2;
4833 cy_card[j].ctl_addr = cy_pci_addr0;
4834 cy_card[j].irq = cy_pci_irq;
4835 cy_card[j].bus_index = 1;
4836 cy_card[j].first_line = cy_next_channel;
4837 cy_card[j].num_chips = -1;
4838 cy_init_card(&cy_card[j]);
4839 pci_set_drvdata(pdev, &cy_card[j]);
4840
4841 dev_info(&pdev->dev, "Cyclades-Ze/PCI #%d found: %d channels starting "
4842 "from port %d.\n", j + 1, cy_pci_nchan, cy_next_channel);
4843
4844 for (j = cy_next_channel; j < cy_next_channel + cy_pci_nchan; j++)
4845 tty_register_device(cy_serial_driver, j, &pdev->dev);
4846 cy_next_channel += cy_pci_nchan;
4847
4848 return 0;
4849}
4850
4851static int __devinit cy_pci_probe(struct pci_dev *pdev,
4852 const struct pci_device_id *ent)
4853{
4854 unsigned char cyy_rev_id;
4855 int cy_pci_irq;
4856 __u32 mailbox;
4857 void __iomem *cy_pci_addr0, *cy_pci_addr2;
4858 unsigned int device_id;
4859 unsigned short j, cy_pci_nchan, plx_ver;
4860 int retval;
4861
4862 retval = pci_enable_device(pdev);
4863 if (retval) {
4864 dev_err(&pdev->dev, "cannot enable device\n");
4865 return retval;
4866 }
4867
4868 /* read PCI configuration area */
4869 cy_pci_irq = pdev->irq;
4870 pci_read_config_byte(pdev, PCI_REVISION_ID, &cyy_rev_id);
4871
4872 device_id = pdev->device & ~PCI_DEVICE_ID_MASK;
4873
4874 if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo ||
4875 device_id == PCI_DEVICE_ID_CYCLOM_Y_Hi) {
4876 dev_dbg(&pdev->dev, "Cyclom-Y/PCI found\n");
4877
4878 if (pci_resource_flags(pdev, 2) & IORESOURCE_IO) {
4879 dev_warn(&pdev->dev, "PCI I/O bit incorrectly "
4880 "set. Ignoring it...\n");
4881 pdev->resource[2].flags &= ~IORESOURCE_IO;
4882 }
4883
4884 /* Although we don't use this I/O region, we should
4885 request it from the kernel anyway, to avoid problems
4886 with other drivers accessing it. */
4887 retval = pci_request_regions(pdev, "Cyclom-Y");
4888 if (retval) {
4889 dev_err(&pdev->dev, "failed to reserve resources\n");
4890 return retval;
4891 }
4892#if defined(__alpha__)
4893 if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo) { /* below 1M? */
4894 dev_err(&pdev->dev, "Cyclom-Y/PCI not supported for "
4895 "low addresses on Alpha systems.\n");
4896 return -EIO;
4897 }
4898#endif
4899 cy_pci_addr0 = pci_iomap(pdev, 0, CyPCI_Yctl);
4900 cy_pci_addr2 = pci_iomap(pdev, 2, CyPCI_Ywin);
4901
4902 dev_dbg(&pdev->dev, "Cyclom-Y/PCI: relocate winaddr=0x%p "
4903 "ctladdr=0x%p\n", cy_pci_addr2, cy_pci_addr0);
4904
4905 cy_pci_nchan = (unsigned short)(CyPORTS_PER_CHIP *
4906 cyy_init_card(cy_pci_addr2, 1));
4907 if (cy_pci_nchan == 0) {
4908 dev_err(&pdev->dev, "Cyclom-Y PCI host card with no "
4909 "Serial-Modules\n");
4910 return -EIO;
4911 }
4912 if ((cy_next_channel + cy_pci_nchan) > NR_PORTS) {
4913 dev_err(&pdev->dev, "Cyclom-Y/PCI found, but no "
4914 "channels are available. Change NR_PORTS in "
4915 "cyclades.c and recompile kernel.\n");
4916 return -EIO;
4917 }
4918 /* fill the next cy_card structure available */
4919 for (j = 0; j < NR_CARDS; j++) {
4920 if (cy_card[j].base_addr == 0)
4921 break;
4922 }
4923 if (j == NR_CARDS) { /* no more cy_cards available */
4924 dev_err(&pdev->dev, "Cyclom-Y/PCI found, but no more "
4925 "cards can be used. Change NR_CARDS in "
4926 "cyclades.c and recompile kernel.\n");
4927 return -EIO;
4928 }
4929
4930 /* allocate IRQ */
4931 retval = request_irq(cy_pci_irq, cyy_interrupt,
4932 IRQF_SHARED, "Cyclom-Y", &cy_card[j]);
4933 if (retval) {
4934 dev_err(&pdev->dev, "could not allocate IRQ\n");
4935 return retval;
4936 }
4937
4938 /* set cy_card */
4939 cy_card[j].base_addr = cy_pci_addr2;
4940 cy_card[j].ctl_addr = cy_pci_addr0;
4941 cy_card[j].irq = cy_pci_irq;
4942 cy_card[j].bus_index = 1;
4943 cy_card[j].first_line = cy_next_channel;
4944 cy_card[j].num_chips = cy_pci_nchan / 4;
4945 cy_init_card(&cy_card[j]);
4946 pci_set_drvdata(pdev, &cy_card[j]);
4947
4948 /* enable interrupts in the PCI interface */
4949 plx_ver = readb(cy_pci_addr2 + CyPLX_VER) & 0x0f;
4950 switch (plx_ver) {
4951 case PLX_9050:
4952
4953 cy_writeb(cy_pci_addr0 + 0x4c, 0x43);
4954 break;
4955
4956 case PLX_9060:
4957 case PLX_9080:
4958 default: /* Old boards, use PLX_9060 */
4959
4960 plx_init(cy_pci_addr0, 0x6c);
4961 /* For some yet unknown reason, once the PLX9060 reloads
4962 the EEPROM, the IRQ is lost and, thus, we have to
4963 re-write it to the PCI config. registers.
4964 This will remain here until we find a permanent
4965 fix. */
4966 pci_write_config_byte(pdev, PCI_INTERRUPT_LINE,
4967 cy_pci_irq);
4968
4969 cy_writew(cy_pci_addr0 + 0x68,
4970 readw(cy_pci_addr0 + 0x68) | 0x0900);
4971 break;
4972 }
4973
4974 dev_info(&pdev->dev, "Cyclom-Y/PCI #%d found: %d channels "
4975 "starting from port %d.\n", j + 1, cy_pci_nchan,
4976 cy_next_channel);
4977
4978 for (j = cy_next_channel;
4979 j < cy_next_channel + cy_pci_nchan; j++)
4980 tty_register_device(cy_serial_driver, j, &pdev->dev);
4981
4982 cy_next_channel += cy_pci_nchan;
4983 } else if (device_id == PCI_DEVICE_ID_CYCLOM_Z_Lo) {
4984 dev_err(&pdev->dev, "Cyclades-Z/PCI not supported for "
4985 "low addresses\n");
4986 return -EIO;
4987 } else if (device_id == PCI_DEVICE_ID_CYCLOM_Z_Hi) {
4988 dev_dbg(&pdev->dev, "Cyclades-Z/PCI found\n");
4989
4990 cy_pci_addr0 = pci_iomap(pdev, 0, CyPCI_Zctl);
4991
4992 /* Disable interrupts on the PLX before resetting it */
4993 cy_writew(cy_pci_addr0 + 0x68,
4994 readw(cy_pci_addr0 + 0x68) & ~0x0900);
4995
4996 plx_init(cy_pci_addr0, 0x6c);
4997 /* For some yet unknown reason, once the PLX9060 reloads
4998 the EEPROM, the IRQ is lost and, thus, we have to
4999 re-write it to the PCI config. registers.
5000 This will remain here until we find a permanent
5001 fix. */
5002 pci_write_config_byte(pdev, PCI_INTERRUPT_LINE, cy_pci_irq);
5003
5004 mailbox = (__u32)readl(&((struct RUNTIME_9060 __iomem *)
5005 cy_pci_addr0)->mail_box_0);
5006
5007 if (pci_resource_flags(pdev, 2) & IORESOURCE_IO) {
5008 dev_warn(&pdev->dev, "PCI I/O bit incorrectly "
5009 "set. Ignoring it...\n");
5010 pdev->resource[2].flags &= ~IORESOURCE_IO;
5011 }
5012
5013 /* Although we don't use this I/O region, we should
5014 request it from the kernel anyway, to avoid problems
5015 with other drivers accessing it. */
5016 retval = pci_request_regions(pdev, "Cyclades-Z");
5017 if (retval) {
5018 dev_err(&pdev->dev, "failed to reserve resources\n");
5019 return retval;
5020 }
5021
5022 if (mailbox == ZE_V1) {
5023 retval = cy_init_Ze(cy_pci_addr0, cy_pci_irq, pdev);
5024 return retval;
5025 } else {
5026 cy_pci_addr2 = pci_iomap(pdev, 2, CyPCI_Zwin);
5027 }
5028
5029 dev_dbg(&pdev->dev, "Cyclades-Z/PCI: relocate winaddr=0x%p "
5030 "ctladdr=0x%p\n", cy_pci_addr2, cy_pci_addr0);
5031#ifdef CY_PCI_DEBUG
5032 if (mailbox == ZO_V1) {
5033 cy_writel(&((struct RUNTIME_9060 *)
5034 (cy_pci_addr0))->loc_addr_base,
5035 WIN_CREG);
5036 dev_info(&pdev->dev, "Cyclades-8Zo/PCI: FPGA id %lx, "
5037 "ver %lx\n", (ulong)(0xff &
5038 readl(&((struct CUSTOM_REG *)
5039 cy_pci_addr2)->fpga_id)),
5040 (ulong)(0xff & readl(&((struct CUSTOM_REG *)
5041 cy_pci_addr2)->fpga_version)));
5042 cy_writel(&((struct RUNTIME_9060 *)
5043 cy_pci_addr0)->loc_addr_base, WIN_RAM);
5044 } else {
5045 dev_info(&pdev->dev, "Cyclades-Z/PCI: New Cyclades-Z "
5046 "board. FPGA not loaded\n");
5047 }
5048#endif
5049 /* The following clears the firmware id word. This
5050 ensures that the driver will not attempt to talk to
5051 the board until it has been properly initialized.
5052 */
5053 if ((mailbox == ZO_V1) || (mailbox == ZO_V2))
5054 cy_writel(cy_pci_addr2 + ID_ADDRESS, 0L);
5055
5056 /* This must be a Cyclades-8Zo/PCI. The extendable
5057 version will have a different device_id and will
5058 be allocated its maximum number of ports. */
5059 cy_pci_nchan = 8;
5060
5061 if ((cy_next_channel + cy_pci_nchan) > NR_PORTS) {
5062 dev_err(&pdev->dev, "Cyclades-8Zo/PCI found, but no "
5063 "channels are available. Change NR_PORTS in "
5064 "cyclades.c and recompile kernel.\n");
5065 return -EIO;
5066 }
5067
5068 /* fill the next cy_card structure available */
5069 for (j = 0; j < NR_CARDS; j++) {
5070 if (cy_card[j].base_addr == 0)
5071 break;
5072 }
5073 if (j == NR_CARDS) { /* no more cy_cards available */
5074 dev_err(&pdev->dev, "Cyclades-8Zo/PCI found, but no "
5075 "more cards can be used. Change NR_CARDS in "
5076 "cyclades.c and recompile kernel.\n");
5077 return -EIO;
5078 }
5079#ifdef CONFIG_CYZ_INTR
5080 /* allocate IRQ only if board has an IRQ */
5081 if ((cy_pci_irq != 0) && (cy_pci_irq != 255)) {
5082 retval = request_irq(cy_pci_irq, cyz_interrupt,
5083 IRQF_SHARED, "Cyclades-Z",
5084 &cy_card[j]);
5085 if (retval) {
5086 dev_err(&pdev->dev, "could not allocate IRQ\n");
5087 return retval;
5088 }
5089 }
5090#endif /* CONFIG_CYZ_INTR */
5091
5092 /* set cy_card */
5093 cy_card[j].base_addr = cy_pci_addr2;
5094 cy_card[j].ctl_addr = cy_pci_addr0;
5095 cy_card[j].irq = cy_pci_irq;
5096 cy_card[j].bus_index = 1;
5097 cy_card[j].first_line = cy_next_channel;
5098 cy_card[j].num_chips = -1;
5099 cy_init_card(&cy_card[j]);
5100 pci_set_drvdata(pdev, &cy_card[j]);
5101
5102 dev_info(&pdev->dev, "Cyclades-8Zo/PCI #%d found: %d channels "
5103 "starting from port %d.\n", j + 1, cy_pci_nchan,
5104 cy_next_channel);
5105
5106 for (j = cy_next_channel;
5107 j < cy_next_channel + cy_pci_nchan; j++)
5108 tty_register_device(cy_serial_driver, j, &pdev->dev);
5109 cy_next_channel += cy_pci_nchan;
5110 }
5111
5112 return 0;
5113}
5114
5115static void __devexit cy_pci_remove(struct pci_dev *pdev)
5116{
5117 struct cyclades_card *cinfo = pci_get_drvdata(pdev);
5118 unsigned int i;
5119
5120 /* non-Z with old PLX */
5121 if (!IS_CYC_Z(*cinfo) && (readb(cinfo->base_addr + CyPLX_VER) & 0x0f) ==
5122 PLX_9050)
5123 cy_writeb(cinfo->ctl_addr + 0x4c, 0);
5124 else
5125#ifndef CONFIG_CYZ_INTR
5126 if (!IS_CYC_Z(*cinfo))
5127#endif
5128 cy_writew(cinfo->ctl_addr + 0x68,
5129 readw(cinfo->ctl_addr + 0x68) & ~0x0900);
5130
5131 pci_iounmap(pdev, cinfo->base_addr);
5132 if (cinfo->ctl_addr)
5133 pci_iounmap(pdev, cinfo->ctl_addr);
5134 if (cinfo->irq
5135#ifndef CONFIG_CYZ_INTR
5136 && !IS_CYC_Z(*cinfo)
5137#endif /* CONFIG_CYZ_INTR */
5138 )
5139 free_irq(cinfo->irq, cinfo);
5140 pci_release_regions(pdev);
5141
5142 cinfo->base_addr = NULL;
5143 for (i = cinfo->first_line; i < cinfo->first_line + cinfo->nports; i++){
5144 cy_port[i].line = -1;
5145 cy_port[i].magic = -1;
5146 }
5147 for (i = cinfo->first_line; i < cinfo->first_line +
5148 cinfo->nports; i++)
5149 tty_unregister_device(cy_serial_driver, i);
5150}
5151
5152static struct pci_driver cy_pci_driver = {
5153 .name = "cyclades",
5154 .id_table = cy_pci_dev_id,
5155 .probe = cy_pci_probe,
5156 .remove = __devexit_p(cy_pci_remove)
5157};
5158#endif
5159
5160static int
5161cyclades_get_proc_info(char *buf, char **start, off_t offset, int length,
5162 int *eof, void *data)
5163{
5164 struct cyclades_port *info;
5165 int i;
5166 int len = 0;
5167 off_t begin = 0;
5168 off_t pos = 0;
5169 int size;
5170 __u32 cur_jifs = jiffies;
5171
5172 size = sprintf(buf, "Dev TimeOpen BytesOut IdleOut BytesIn "
5173 "IdleIn Overruns Ldisc\n");
5174
5175 pos += size;
5176 len += size;
5177
5178 /* Output one line for each known port */
5179 for (i = 0; i < NR_PORTS && cy_port[i].line >= 0; i++) {
5180 info = &cy_port[i];
5181
5182 if (info->count)
5183 size = sprintf(buf + len, "%3d %8lu %10lu %8lu %10lu "
5184 "%8lu %9lu %6ld\n", info->line,
5185 (cur_jifs - info->idle_stats.in_use) / HZ,
5186 info->idle_stats.xmit_bytes,
5187 (cur_jifs - info->idle_stats.xmit_idle) / HZ,
5188 info->idle_stats.recv_bytes,
5189 (cur_jifs - info->idle_stats.recv_idle) / HZ,
5190 info->idle_stats.overruns,
5191 (long)info->tty->ldisc.num);
5192 else
5193 size = sprintf(buf + len, "%3d %8lu %10lu %8lu %10lu "
5194 "%8lu %9lu %6ld\n",
5195 info->line, 0L, 0L, 0L, 0L, 0L, 0L, 0L);
5196 len += size;
5197 pos = begin + len;
5198
5199 if (pos < offset) {
5200 len = 0;
5201 begin = pos;
5202 }
5203 if (pos > offset + length)
5204 goto done;
5205 }
5206 *eof = 1;
5207done:
5208 *start = buf + (offset - begin); /* Start of wanted data */
5209 len -= (offset - begin); /* Start slop */
5210 if (len > length)
5211 len = length; /* Ending slop */
5212 if (len < 0)
5213 len = 0;
5214 return len;
5215}
5216
5217/* The serial driver boot-time initialization code!
5218 Hardware I/O ports are mapped to character special devices on a
5219 first found, first allocated manner. That is, this code searches
5220 for Cyclom cards in the system. As each is found, it is probed
5221 to discover how many chips (and thus how many ports) are present.
5222 These ports are mapped to the tty ports 32 and upward in monotonic
5223 fashion. If an 8-port card is replaced with a 16-port card, the
5224 port mapping on a following card will shift.
5225
5226 This approach is different from what is used in the other serial
5227 device driver because the Cyclom is more properly a multiplexer,
5228 not just an aggregation of serial ports on one card.
5229
5230 If there are more cards with more ports than have been
5231 statically allocated above, a warning is printed and the
5232 extra ports are ignored.
5233 */
5234
5235static const struct tty_operations cy_ops = {
5236 .open = cy_open,
5237 .close = cy_close,
5238 .write = cy_write,
5239 .put_char = cy_put_char,
5240 .flush_chars = cy_flush_chars,
5241 .write_room = cy_write_room,
5242 .chars_in_buffer = cy_chars_in_buffer,
5243 .flush_buffer = cy_flush_buffer,
5244 .ioctl = cy_ioctl,
5245 .throttle = cy_throttle,
5246 .unthrottle = cy_unthrottle,
5247 .set_termios = cy_set_termios,
5248 .stop = cy_stop,
5249 .start = cy_start,
5250 .hangup = cy_hangup,
5251 .break_ctl = cy_break,
5252 .wait_until_sent = cy_wait_until_sent,
5253 .read_proc = cyclades_get_proc_info,
5254 .tiocmget = cy_tiocmget,
5255 .tiocmset = cy_tiocmset,
5256};
5257
5258static int __init cy_init(void)
5259{
5260 unsigned int i, nboards;
5261 int retval = -ENOMEM;
5262
5263 cy_serial_driver = alloc_tty_driver(NR_PORTS);
5264 if (!cy_serial_driver)
5265 goto err;
5266
5267 printk(KERN_INFO "Cyclades driver " CY_VERSION " (built %s %s)\n",
5268 __DATE__, __TIME__);
5269
5270 /* Initialize the tty_driver structure */
5271
5272 cy_serial_driver->owner = THIS_MODULE;
5273 cy_serial_driver->driver_name = "cyclades";
5274 cy_serial_driver->name = "ttyC";
5275 cy_serial_driver->major = CYCLADES_MAJOR;
5276 cy_serial_driver->minor_start = 0;
5277 cy_serial_driver->type = TTY_DRIVER_TYPE_SERIAL;
5278 cy_serial_driver->subtype = SERIAL_TYPE_NORMAL;
5279 cy_serial_driver->init_termios = tty_std_termios;
5280 cy_serial_driver->init_termios.c_cflag =
5281 B9600 | CS8 | CREAD | HUPCL | CLOCAL;
5282 cy_serial_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
5283 tty_set_operations(cy_serial_driver, &cy_ops);
5284
5285 retval = tty_register_driver(cy_serial_driver);
5286 if (retval) {
5287 printk(KERN_ERR "Couldn't register Cyclades serial driver\n");
5288 goto err_frtty;
5289 }
5290
5291 for (i = 0; i < NR_PORTS; i++) {
5292 cy_port[i].line = -1;
5293 cy_port[i].magic = -1;
5294 }
5295
5296 /* the code below is responsible to find the boards. Each different
5297 type of board has its own detection routine. If a board is found,
5298 the next cy_card structure available is set by the detection
5299 routine. These functions are responsible for checking the
5300 availability of cy_card and cy_port data structures and updating
5301 the cy_next_channel. */
5302
5303 /* look for isa boards */
5304 nboards = cy_detect_isa();
5305
5306#ifdef CONFIG_PCI
5307 /* look for pci boards */
5308 retval = pci_register_driver(&cy_pci_driver);
5309 if (retval && !nboards)
5310 goto err_unr;
5311#endif
5312
5313 return 0;
5314err_unr:
5315 tty_unregister_driver(cy_serial_driver);
5316err_frtty:
5317 put_tty_driver(cy_serial_driver);
5318err:
5319 return retval;
5320} /* cy_init */
5321
5322static void __exit cy_cleanup_module(void)
5323{
5324 int i, e1;
5325
5326#ifndef CONFIG_CYZ_INTR
5327 del_timer_sync(&cyz_timerlist);
5328#endif /* CONFIG_CYZ_INTR */
5329
5330 if ((e1 = tty_unregister_driver(cy_serial_driver)))
5331 printk(KERN_ERR "failed to unregister Cyclades serial "
5332 "driver(%d)\n", e1);
5333
5334 put_tty_driver(cy_serial_driver);
5335
5336#ifdef CONFIG_PCI
5337 pci_unregister_driver(&cy_pci_driver);
5338#endif
5339
5340 for (i = 0; i < NR_CARDS; i++) {
5341 if (cy_card[i].base_addr) {
5342 /* clear interrupt */
5343 cy_writeb(cy_card[i].base_addr + Cy_ClrIntr, 0);
5344 iounmap(cy_card[i].base_addr);
5345 if (cy_card[i].ctl_addr)
5346 iounmap(cy_card[i].ctl_addr);
5347 if (cy_card[i].irq
5348#ifndef CONFIG_CYZ_INTR
5349 && !IS_CYC_Z(cy_card[i])
5350#endif /* CONFIG_CYZ_INTR */
5351 )
5352 free_irq(cy_card[i].irq, &cy_card[i]);
5353 for (e1 = cy_card[i].first_line;
5354 e1 < cy_card[i].first_line +
5355 cy_card[i].nports; e1++)
5356 tty_unregister_device(cy_serial_driver, e1);
5357 }
5358 }
5359} /* cy_cleanup_module */
5360
5361module_init(cy_init);
5362module_exit(cy_cleanup_module);
5363
5364MODULE_LICENSE("GPL");
Linux kernel - Deliverables
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