3 #undef Z_EXT_CHARS_IN_BUFFER
6 * linux/drivers/char/cyclades.c
8 * This file contains the driver for the Cyclades async multiport
11 * Initially written by Randolph Bentson <bentson@grieg.seaslug.org>.
12 * Modified and maintained by Marcio Saito <marcio@cyclades.com>.
14 * Copyright (C) 2007 Jiri Slaby <jirislaby@gmail.com>
16 * Much of the design and some of the code came from serial.c
17 * which was copyright (C) 1991, 1992 Linus Torvalds. It was
18 * extensively rewritten by Theodore Ts'o, 8/16/92 -- 9/14/92,
19 * and then fixed as suggested by Michael K. Johnson 12/12/92.
20 * Converted to pci probing and cleaned up by Jiri Slaby.
22 * This version supports shared IRQ's (only for PCI boards).
24 * Prevent users from opening non-existing Z ports.
26 * Revision 2.3.2.8 2000/07/06 18:14:16 ivan
27 * Fixed the PCI detection function to work properly on Alpha systems.
28 * Implemented support for TIOCSERGETLSR ioctl.
29 * Implemented full support for non-standard baud rates.
31 * Revision 2.3.2.7 2000/06/01 18:26:34 ivan
32 * Request PLX I/O region, although driver doesn't use it, to avoid
33 * problems with other drivers accessing it.
34 * Removed count for on-board buffer characters in cy_chars_in_buffer
37 * Revision 2.3.2.6 2000/05/05 13:56:05 ivan
38 * Driver now reports physical instead of virtual memory addresses.
39 * Masks were added to some Cyclades-Z read accesses.
40 * Implemented workaround for PLX9050 bug that would cause a system lockup
41 * in certain systems, depending on the MMIO addresses allocated to the
43 * Changed the Tx interrupt programming in the CD1400 chips to boost up
44 * performance (Cyclom-Y only).
45 * Code is now compliant with the new module interface (module_[init|exit]).
46 * Make use of the PCI helper functions to access PCI resources.
47 * Did some code "housekeeping".
49 * Revision 2.3.2.5 2000/01/19 14:35:33 ivan
50 * Fixed bug in cy_set_termios on CRTSCTS flag turnoff.
52 * Revision 2.3.2.4 2000/01/17 09:19:40 ivan
53 * Fixed SMP locking in Cyclom-Y interrupt handler.
55 * Revision 2.3.2.3 1999/12/28 12:11:39 ivan
56 * Added a new cyclades_card field called nports to allow the driver to
57 * know the exact number of ports found by the Z firmware after its load;
58 * RX buffer contention prevention logic on interrupt op mode revisited
60 * Revisited printk's for Z debug;
61 * Driver now makes sure that the constant SERIAL_XMIT_SIZE is defined;
63 * Revision 2.3.2.2 1999/10/01 11:27:43 ivan
64 * Fixed bug in cyz_poll that would make all ports but port 0
65 * unable to transmit/receive data (Cyclades-Z only);
66 * Implemented logic to prevent the RX buffer from being stuck with data
67 * due to a driver / firmware race condition in interrupt op mode
69 * Fixed bug in block_til_ready logic that would lead to a system crash;
70 * Revisited cy_close spinlock usage;
72 * Revision 2.3.2.1 1999/09/28 11:01:22 ivan
73 * Revisited CONFIG_PCI conditional compilation for PCI board support;
74 * Implemented TIOCGICOUNT and TIOCMIWAIT ioctl support;
75 * _Major_ cleanup on the Cyclades-Z interrupt support code / logic;
76 * Removed CTS handling from the driver -- this is now completely handled
77 * by the firmware (Cyclades-Z only);
78 * Flush RX on-board buffers on a port open (Cyclades-Z only);
79 * Fixed handling of ASYNC_SPD_* TTY flags;
80 * Module unload now unmaps all memory area allocated by ioremap;
82 * Revision 2.3.1.1 1999/07/15 16:45:53 ivan
83 * Removed CY_PROC conditional compilation;
84 * Implemented SMP-awareness for the driver;
85 * Implemented a new ISA IRQ autoprobe that uses the irq_probe_[on|off]
87 * The driver now accepts memory addresses (maddr=0xMMMMM) and IRQs
88 * (irq=NN) as parameters (only for ISA boards);
89 * Fixed bug in set_line_char that would prevent the Cyclades-Z
90 * ports from being configured at speeds above 115.2Kbps;
91 * Fixed bug in cy_set_termios that would prevent XON/XOFF flow control
92 * switching from working properly;
93 * The driver now only prints IRQ info for the Cyclades-Z if it's
94 * configured to work in interrupt mode;
96 * Revision 2.2.2.3 1999/06/28 11:13:29 ivan
97 * Added support for interrupt mode operation for the Z cards;
98 * Removed the driver inactivity control for the Z;
99 * Added a missing MOD_DEC_USE_COUNT in the cy_open function for when
100 * the Z firmware is not loaded yet;
101 * Replaced the "manual" Z Tx flush buffer by a call to a FW command of
102 * same functionality;
103 * Implemented workaround for IRQ setting loss on the PCI configuration
104 * registers after a PCI bridge EEPROM reload (affects PLX9060 only);
106 * Revision 2.2.2.2 1999/05/14 17:18:15 ivan
107 * /proc entry location changed to /proc/tty/driver/cyclades;
108 * Added support to shared IRQ's (only for PCI boards);
109 * Added support for Cobalt Qube2 systems;
110 * IRQ [de]allocation scheme revisited;
111 * BREAK implementation changed in order to make use of the 'break_ctl'
113 * Fixed typo in TTY structure field 'driver_name';
114 * Included a PCI bridge reset and EEPROM reload in the board
115 * initialization code (for both Y and Z series).
117 * Revision 2.2.2.1 1999/04/08 16:17:43 ivan
118 * Fixed a bug in cy_wait_until_sent that was preventing the port to be
119 * closed properly after a SIGINT;
120 * Module usage counter scheme revisited;
121 * Added support to the upcoming Y PCI boards (i.e., support to additional
124 * Revision 2.2.1.10 1999/01/20 16:14:29 ivan
125 * Removed all unnecessary page-alignement operations in ioremap calls
126 * (ioremap is currently safe for these operations).
128 * Revision 2.2.1.9 1998/12/30 18:18:30 ivan
129 * Changed access to PLX PCI bridge registers from I/O to MMIO, in
130 * order to make PLX9050-based boards work with certain motherboards.
132 * Revision 2.2.1.8 1998/11/13 12:46:20 ivan
133 * cy_close function now resets (correctly) the tty->closing flag;
134 * JIFFIES_DIFF macro fixed.
136 * Revision 2.2.1.7 1998/09/03 12:07:28 ivan
137 * Fixed bug in cy_close function, which was not informing HW of
138 * which port should have the reception disabled before doing so;
139 * fixed Cyclom-8YoP hardware detection bug.
141 * Revision 2.2.1.6 1998/08/20 17:15:39 ivan
142 * Fixed bug in cy_close function, which causes malfunction
143 * of one of the first 4 ports when a higher port is closed
146 * Revision 2.2.1.5 1998/08/10 18:10:28 ivan
147 * Fixed Cyclom-4Yo hardware detection bug.
149 * Revision 2.2.1.4 1998/08/04 11:02:50 ivan
150 * /proc/cyclades implementation with great collaboration of
151 * Marc Lewis <marc@blarg.net>;
152 * cyy_interrupt was changed to avoid occurrence of kernel oopses
153 * during PPP operation.
155 * Revision 2.2.1.3 1998/06/01 12:09:10 ivan
156 * General code review in order to comply with 2.1 kernel standards;
157 * data loss prevention for slow devices revisited (cy_wait_until_sent
159 * removed conditional compilation for new/old PCI structure support
160 * (now the driver only supports the new PCI structure).
162 * Revision 2.2.1.1 1998/03/19 16:43:12 ivan
163 * added conditional compilation for new/old PCI structure support;
164 * removed kernel series (2.0.x / 2.1.x) conditional compilation.
166 * Revision 2.1.1.3 1998/03/16 18:01:12 ivan
167 * cleaned up the data loss fix;
168 * fixed XON/XOFF handling once more (Cyclades-Z);
169 * general review of the driver routines;
170 * introduction of a mechanism to prevent data loss with slow
171 * printers, by forcing a delay before closing the port.
173 * Revision 2.1.1.2 1998/02/17 16:50:00 ivan
174 * fixed detection/handling of new CD1400 in Ye boards;
175 * fixed XON/XOFF handling (Cyclades-Z);
176 * fixed data loss caused by a premature port close;
177 * introduction of a flag that holds the CD1400 version ID per port
178 * (used by the CYGETCD1400VER new ioctl).
180 * Revision 2.1.1.1 1997/12/03 17:31:19 ivan
181 * Code review for the module cleanup routine;
182 * fixed RTS and DTR status report for new CD1400's in get_modem_info;
183 * includes anonymous changes regarding signal_pending.
185 * Revision 2.1 1997/11/01 17:42:41 ivan
186 * Changes in the driver to support Alpha systems (except 8Zo V_1);
187 * BREAK fix for the Cyclades-Z boards;
188 * driver inactivity control by FW implemented;
189 * introduction of flag that allows driver to take advantage of
190 * a special CD1400 feature related to HW flow control;
191 * added support for the CD1400 rev. J (Cyclom-Y boards);
192 * introduction of ioctls to:
193 * - control the rtsdtr_inv flag (Cyclom-Y);
194 * - control the rflow flag (Cyclom-Y);
195 * - adjust the polling interval (Cyclades-Z);
197 * Revision 1.36.4.33 1997/06/27 19:00:00 ivan
198 * Fixes related to kernel version conditional
201 * Revision 1.36.4.32 1997/06/14 19:30:00 ivan
202 * Compatibility issues between kernels 2.0.x and
203 * 2.1.x (mainly related to clear_bit function).
205 * Revision 1.36.4.31 1997/06/03 15:30:00 ivan
206 * Changes to define the memory window according to the
209 * Revision 1.36.4.30 1997/05/16 15:30:00 daniel
210 * Changes to support new cycladesZ boards.
212 * Revision 1.36.4.29 1997/05/12 11:30:00 daniel
213 * Merge of Bentson's and Daniel's version 1.36.4.28.
214 * Corrects bug in cy_detect_pci: check if there are more
215 * ports than the number of static structs allocated.
216 * Warning message during initialization if this driver is
217 * used with the new generation of cycladesZ boards. Those
218 * will be supported only in next release of the driver.
219 * Corrects bug in cy_detect_pci and cy_detect_isa that
220 * returned wrong number of VALID boards, when a cyclomY
221 * was found with no serial modules connected.
222 * Changes to use current (2.1.x) kernel subroutine names
223 * and created macros for compilation with 2.0.x kernel,
224 * instead of the other way around.
226 * Revision 1.36.4.28 1997/05/?? ??:00:00 bentson
227 * Change queue_task_irq_off to queue_task_irq.
228 * The inline function queue_task_irq_off (tqueue.h)
229 * was removed from latest releases of 2.1.x kernel.
230 * Use of macro __init to mark the initialization
231 * routines, so memory can be reused.
232 * Also incorporate implementation of critical region
233 * in function cleanup_module() created by anonymous
236 * Revision 1.36.4.28 1997/04/25 16:00:00 daniel
237 * Change to support new firmware that solves DCD problem:
238 * application could fail to receive SIGHUP signal when DCD
241 * Revision 1.36.4.27 1997/03/26 10:30:00 daniel
242 * Changed for support linux versions 2.1.X.
243 * Backward compatible with linux versions 2.0.X.
244 * Corrected illegal use of filler field in
246 * Deleted some debug messages.
248 * Revision 1.36.4.26 1997/02/27 12:00:00 daniel
249 * Included check for NULL tty pointer in cyz_poll.
251 * Revision 1.36.4.25 1997/02/26 16:28:30 bentson
252 * Bill Foster at Blarg! Online services noticed that
253 * some of the switch elements of -Z modem control
254 * lacked a closing "break;"
256 * Revision 1.36.4.24 1997/02/24 11:00:00 daniel
257 * Changed low water threshold for buffer xmit_buf
259 * Revision 1.36.4.23 1996/12/02 21:50:16 bentson
260 * Marcio provided fix to modem status fetch for -Z
262 * Revision 1.36.4.22 1996/10/28 22:41:17 bentson
263 * improve mapping of -Z control page (thanks to Steve
264 * Price <stevep@fa.tdktca.com> for help on this)
266 * Revision 1.36.4.21 1996/09/10 17:00:10 bentson
267 * shift from CPU-bound to memcopy in cyz_polling operation
269 * Revision 1.36.4.20 1996/09/09 18:30:32 Bentson
270 * Added support to set and report higher speeds.
272 * Revision 1.36.4.19c 1996/08/09 10:00:00 Marcio Saito
273 * Some fixes in the HW flow control for the BETA release.
274 * Don't try to register the IRQ.
276 * Revision 1.36.4.19 1996/08/08 16:23:18 Bentson
277 * make sure "cyc" appears in all kernel messages; all soft interrupts
278 * handled by same routine; recognize out-of-band reception; comment
279 * out some diagnostic messages; leave RTS/CTS flow control to hardware;
280 * fix race condition in -Z buffer management; only -Y needs to explicitly
281 * flush chars; tidy up some startup messages;
283 * Revision 1.36.4.18 1996/07/25 18:57:31 bentson
284 * shift MOD_INC_USE_COUNT location to match
285 * serial.c; purge some diagnostic messages;
287 * Revision 1.36.4.17 1996/07/25 18:01:08 bentson
288 * enable modem status messages and fetch & process them; note
289 * time of last activity type for each port; set_line_char now
290 * supports more than line 0 and treats 0 baud correctly;
291 * get_modem_info senses rs_status;
293 * Revision 1.36.4.16 1996/07/20 08:43:15 bentson
294 * barely works--now's time to turn on
295 * more features 'til it breaks
297 * Revision 1.36.4.15 1996/07/19 22:30:06 bentson
298 * check more -Z board status; shorten boot message
300 * Revision 1.36.4.14 1996/07/19 22:20:37 bentson
301 * fix reference to ch_ctrl in startup; verify return
302 * values from cyz_issue_cmd and cyz_update_channel;
303 * more stuff to get modem control correct;
305 * Revision 1.36.4.13 1996/07/11 19:53:33 bentson
306 * more -Z stuff folded in; re-order changes to put -Z stuff
307 * after -Y stuff (to make changes clearer)
309 * Revision 1.36.4.12 1996/07/11 15:40:55 bentson
310 * Add code to poll Cyclades-Z. Add code to get & set RS-232 control.
311 * Add code to send break. Clear firmware ID word at startup (so
312 * that other code won't talk to inactive board).
314 * Revision 1.36.4.11 1996/07/09 05:28:29 bentson
315 * add code for -Z in set_line_char
317 * Revision 1.36.4.10 1996/07/08 19:28:37 bentson
318 * fold more -Z stuff (or in some cases, error messages)
319 * into driver; add text to "don't know what to do" messages.
321 * Revision 1.36.4.9 1996/07/08 18:38:38 bentson
322 * moved compile-time flags near top of file; cosmetic changes
323 * to narrow text (to allow 2-up printing); changed many declarations
324 * to "static" to limit external symbols; shuffled code order to
325 * coalesce -Y and -Z specific code, also to put internal functions
326 * in order of tty_driver structure; added code to recognize -Z
327 * ports (and for moment, do nothing or report error); add cy_startup
328 * to parse boot command line for extra base addresses for ISA probes;
330 * Revision 1.36.4.8 1996/06/25 17:40:19 bentson
331 * reorder some code, fix types of some vars (int vs. long),
332 * add cy_setup to support user declared ISA addresses
334 * Revision 1.36.4.7 1996/06/21 23:06:18 bentson
335 * dump ioctl based firmware load (it's now a user level
336 * program); ensure uninitialzed ports cannot be used
338 * Revision 1.36.4.6 1996/06/20 23:17:19 bentson
339 * rename vars and restructure some code
341 * Revision 1.36.4.5 1996/06/14 15:09:44 bentson
342 * get right status back after boot load
344 * Revision 1.36.4.4 1996/06/13 19:51:44 bentson
345 * successfully loads firmware
347 * Revision 1.36.4.3 1996/06/13 06:08:33 bentson
348 * add more of the code for the boot/load ioctls
350 * Revision 1.36.4.2 1996/06/11 21:00:51 bentson
351 * start to add Z functionality--starting with ioctl
352 * for loading firmware
354 * Revision 1.36.4.1 1996/06/10 18:03:02 bentson
355 * added code to recognize Z/PCI card at initialization; report
356 * presence, but card is not initialized (because firmware needs
359 * Revision 1.36.3.8 1996/06/07 16:29:00 bentson
360 * starting minor number at zero; added missing verify_area
361 * as noted by Heiko Eißfeldt <heiko@colossus.escape.de>
363 * Revision 1.36.3.7 1996/04/19 21:06:18 bentson
364 * remove unneeded boot message & fix CLOCAL hardware flow
365 * control (Miquel van Smoorenburg <miquels@Q.cistron.nl>);
366 * remove unused diagnostic statements; minor 0 is first;
368 * Revision 1.36.3.6 1996/03/13 13:21:17 marcio
369 * The kernel function vremap (available only in later 1.3.xx kernels)
370 * allows the access to memory addresses above the RAM. This revision
371 * of the driver supports PCI boards below 1Mb (device id 0x100) and
372 * above 1Mb (device id 0x101).
374 * Revision 1.36.3.5 1996/03/07 15:20:17 bentson
375 * Some global changes to interrupt handling spilled into
376 * this driver--mostly unused arguments in system function
377 * calls. Also added change by Marcio Saito which should
378 * reduce lost interrupts at startup by fast processors.
380 * Revision 1.36.3.4 1995/11/13 20:45:10 bentson
381 * Changes by Corey Minyard <minyard@wf-rch.cirr.com> distributed
382 * in 1.3.41 kernel to remove a possible race condition, extend
383 * some error messages, and let the driver run as a loadable module
384 * Change by Alan Wendt <alan@ez0.ezlink.com> to remove a
385 * possible race condition.
386 * Change by Marcio Saito <marcio@cyclades.com> to fix PCI addressing.
388 * Revision 1.36.3.3 1995/11/13 19:44:48 bentson
389 * Changes by Linus Torvalds in 1.3.33 kernel distribution
390 * required due to reordering of driver initialization.
391 * Drivers are now initialized *after* memory management.
393 * Revision 1.36.3.2 1995/09/08 22:07:14 bentson
394 * remove printk from ISR; fix typo
396 * Revision 1.36.3.1 1995/09/01 12:00:42 marcio
397 * Minor fixes in the PCI board support. PCI function calls in
398 * conditional compilation (CONFIG_PCI). Thanks to Jim Duncan
399 * <duncan@okay.com>. "bad serial count" message removed.
401 * Revision 1.36.3 1995/08/22 09:19:42 marcio
402 * Cyclom-Y/PCI support added. Changes in the cy_init routine and
403 * board initialization. Changes in the boot messages. The driver
404 * supports up to 4 boards and 64 ports by default.
406 * Revision 1.36.1.4 1995/03/29 06:14:14 bentson
407 * disambiguate between Cyclom-16Y and Cyclom-32Ye;
409 * Revision 1.36.1.3 1995/03/23 22:15:35 bentson
410 * add missing break in modem control block in ioctl switch statement
411 * (discovered by Michael Edward Chastain <mec@jobe.shell.portal.com>);
413 * Revision 1.36.1.2 1995/03/22 19:16:22 bentson
414 * make sure CTS flow control is set as soon as possible (thanks
415 * to note from David Lambert <lambert@chesapeake.rps.slb.com>);
417 * Revision 1.36.1.1 1995/03/13 15:44:43 bentson
418 * initialize defaults for receive threshold and stale data timeout;
421 * Revision 1.36 1995/03/10 23:33:53 bentson
422 * added support of chips 4-7 in 32 port Cyclom-Ye;
423 * fix cy_interrupt pointer dereference problem
424 * (Joe Portman <baron@aa.net>);
425 * give better error response if open is attempted on non-existent port
426 * (Zachariah Vaum <jchryslr@netcom.com>);
427 * correct command timeout (Kenneth Lerman <lerman@@seltd.newnet.com>);
428 * conditional compilation for -16Y on systems with fast, noisy bus;
429 * comment out diagnostic print function;
430 * cleaned up table of base addresses;
431 * set receiver time-out period register to correct value,
432 * set receive threshold to better default values,
433 * set chip timer to more accurate 200 Hz ticking,
434 * add code to monitor and modify receive parameters
435 * (Rik Faith <faith@cs.unc.edu> Nick Simicich
436 * <njs@scifi.emi.net>);
438 * Revision 1.35 1994/12/16 13:54:18 steffen
439 * additional patch by Marcio Saito for board detection
440 * Accidently left out in 1.34
442 * Revision 1.34 1994/12/10 12:37:12 steffen
443 * This is the corrected version as suggested by Marcio Saito
445 * Revision 1.33 1994/12/01 22:41:18 bentson
446 * add hooks to support more high speeds directly; add tytso
447 * patch regarding CLOCAL wakeups
449 * Revision 1.32 1994/11/23 19:50:04 bentson
450 * allow direct kernel control of higher signalling rates;
451 * look for cards at additional locations
453 * Revision 1.31 1994/11/16 04:33:28 bentson
454 * ANOTHER fix from Corey Minyard, minyard@wf-rch.cirr.com--
455 * a problem in chars_in_buffer has been resolved by some
456 * small changes; this should yield smoother output
458 * Revision 1.30 1994/11/16 04:28:05 bentson
459 * Fix from Corey Minyard, Internet: minyard@metronet.com,
460 * UUCP: minyard@wf-rch.cirr.com, WORK: minyardbnr.ca, to
461 * cy_hangup that appears to clear up much (all?) of the
462 * DTR glitches; also he's added/cleaned-up diagnostic messages
464 * Revision 1.29 1994/11/16 04:16:07 bentson
465 * add change proposed by Ralph Sims, ralphs@halcyon.com, to
466 * operate higher speeds in same way as other serial ports;
467 * add more serial ports (for up to two 16-port muxes).
469 * Revision 1.28 1994/11/04 00:13:16 root
470 * turn off diagnostic messages
472 * Revision 1.27 1994/11/03 23:46:37 root
473 * bunch of changes to bring driver into greater conformance
474 * with the serial.c driver (looking for missed fixes)
476 * Revision 1.26 1994/11/03 22:40:36 root
477 * automatic interrupt probing fixed.
479 * Revision 1.25 1994/11/03 20:17:02 root
480 * start to implement auto-irq
482 * Revision 1.24 1994/11/03 18:01:55 root
483 * still working on modem signals--trying not to drop DTR
484 * during the getty/login processes
486 * Revision 1.23 1994/11/03 17:51:36 root
487 * extend baud rate support; set receive threshold as function
488 * of baud rate; fix some problems with RTS/CTS;
490 * Revision 1.22 1994/11/02 18:05:35 root
491 * changed arguments to udelay to type long to get
492 * delays to be of correct duration
494 * Revision 1.21 1994/11/02 17:37:30 root
495 * employ udelay (after calibrating loops_per_second earlier
496 * in init/main.c) instead of using home-grown delay routines
498 * Revision 1.20 1994/11/02 03:11:38 root
499 * cy_chars_in_buffer forces a return value of 0 to let
500 * login work (don't know why it does); some functions
501 * that were returning EFAULT, now executes the code;
502 * more work on deciding when to disable xmit interrupts;
504 * Revision 1.19 1994/11/01 20:10:14 root
505 * define routine to start transmission interrupts (by enabling
506 * transmit interrupts); directly enable/disable modem interrupts;
508 * Revision 1.18 1994/11/01 18:40:45 bentson
509 * Don't always enable transmit interrupts in startup; interrupt on
510 * TxMpty instead of TxRdy to help characters get out before shutdown;
511 * restructure xmit interrupt to check for chars first and quit if
512 * none are ready to go; modem status (MXVRx) is upright, _not_ inverted
515 * Revision 1.17 1994/10/30 04:39:45 bentson
516 * rename serial_driver and callout_driver to cy_serial_driver and
517 * cy_callout_driver to avoid linkage interference; initialize
518 * info->type to PORT_CIRRUS; ruggedize paranoia test; elide ->port
519 * from cyclades_port structure; add paranoia check to cy_close;
521 * Revision 1.16 1994/10/30 01:14:33 bentson
522 * change major numbers; add some _early_ return statements;
524 * Revision 1.15 1994/10/29 06:43:15 bentson
525 * final tidying up for clean compile; enable some error reporting
527 * Revision 1.14 1994/10/28 20:30:22 Bentson
528 * lots of changes to drag the driver towards the new tty_io
529 * structures and operation. not expected to work, but may
532 * Revision 1.13 1994/07/21 23:08:57 Bentson
533 * add some diagnostic cruft; support 24 lines (for testing
534 * both -8Y and -16Y cards; be more thorough in servicing all
535 * chips during interrupt; add "volatile" a few places to
536 * circumvent compiler optimizations; fix base & offset
537 * computations in block_til_ready (was causing chip 0 to
540 * Revision 1.12 1994/07/19 16:42:11 Bentson
541 * add some hackery for kernel version 1.1.8; expand
542 * error messages; refine timing for delay loops and
543 * declare loop params volatile
545 * Revision 1.11 1994/06/11 21:53:10 bentson
546 * get use of save_car right in transmit interrupt service
548 * Revision 1.10.1.1 1994/06/11 21:31:18 bentson
549 * add some diagnostic printing; try to fix save_car stuff
551 * Revision 1.10 1994/06/11 20:36:08 bentson
552 * clean up compiler warnings
554 * Revision 1.9 1994/06/11 19:42:46 bentson
555 * added a bunch of code to support modem signalling
557 * Revision 1.8 1994/06/11 17:57:07 bentson
558 * recognize break & parity error
560 * Revision 1.7 1994/06/05 05:51:34 bentson
561 * Reorder baud table to be monotonic; add cli to CP; discard
562 * incoming characters and status if the line isn't open; start to
563 * fold code into cy_throttle; start to port get_serial_info,
564 * set_serial_info, get_modem_info, set_modem_info, and send_break
565 * from serial.c; expand cy_ioctl; relocate and expand config_setup;
566 * get flow control characters from tty struct; invalidate ports w/o
569 * Revision 1.6 1994/05/31 18:42:21 bentson
570 * add a loop-breaker in the interrupt service routine;
571 * note when port is initialized so that it can be shut
572 * down under the right conditions; receive works without
575 * Revision 1.5 1994/05/30 00:55:02 bentson
576 * transmit works without obvious errors
578 * Revision 1.4 1994/05/27 18:46:27 bentson
579 * incorporated more code from lib_y.c; can now print short
580 * strings under interrupt control to port zero; seems to
581 * select ports/channels/lines correctly
583 * Revision 1.3 1994/05/25 22:12:44 bentson
584 * shifting from multi-port on a card to proper multiplexor
585 * data structures; added skeletons of most routines
587 * Revision 1.2 1994/05/19 13:21:43 bentson
588 * start to crib from other sources
592 #define CY_VERSION "2.5"
594 /* If you need to install more boards than NR_CARDS, change the constant
595 in the definition below. No other change is necessary to support up to
596 eight boards. Beyond that you'll have to extend cy_isa_addresses. */
601 If the total number of ports is larger than NR_PORTS, change this
602 constant in the definition below. No other change is necessary to
603 support more boards/ports. */
611 #define SERIAL_PARANOIA_CHECK
613 #undef CY_DEBUG_THROTTLE
614 #undef CY_DEBUG_OTHER
616 #undef CY_DEBUG_COUNT
618 #undef CY_DEBUG_WAIT_UNTIL_SENT
619 #undef CY_DEBUG_INTERRUPTS
621 #undef CY_ENABLE_MONITORING
627 #include <linux/module.h>
628 #include <linux/errno.h>
629 #include <linux/signal.h>
630 #include <linux/sched.h>
631 #include <linux/timer.h>
632 #include <linux/interrupt.h>
633 #include <linux/tty.h>
634 #include <linux/tty_flip.h>
635 #include <linux/serial.h>
636 #include <linux/smp_lock.h>
637 #include <linux/major.h>
638 #include <linux/string.h>
639 #include <linux/fcntl.h>
640 #include <linux/ptrace.h>
641 #include <linux/cyclades.h>
642 #include <linux/mm.h>
643 #include <linux/ioport.h>
644 #include <linux/init.h>
645 #include <linux/delay.h>
646 #include <linux/spinlock.h>
647 #include <linux/bitops.h>
648 #include <linux/firmware.h>
649 #include <linux/device.h>
651 #include <asm/system.h>
652 #include <linux/io.h>
654 #include <linux/uaccess.h>
656 #include <linux/kernel.h>
657 #include <linux/pci.h>
659 #include <linux/stat.h>
660 #include <linux/proc_fs.h>
661 #include <linux/seq_file.h>
663 static void cy_throttle(struct tty_struct
*tty
);
664 static void cy_send_xchar(struct tty_struct
*tty
, char ch
);
666 #ifndef SERIAL_XMIT_SIZE
667 #define SERIAL_XMIT_SIZE (min(PAGE_SIZE, 4096))
669 #define WAKEUP_CHARS 256
671 #define STD_COM_FLAGS (0)
674 #define ZL_MAX_BLOCKS 16
675 #define DRIVER_VERSION 0x02010203
676 #define RAM_SIZE 0x80000
683 struct zfile_header
{
692 } __attribute__ ((packed
));
694 struct zfile_config
{
699 u32 block_list
[ZL_MAX_BLOCKS
];
700 } __attribute__ ((packed
));
707 } __attribute__ ((packed
));
709 static struct tty_driver
*cy_serial_driver
;
712 /* This is the address lookup table. The driver will probe for
713 Cyclom-Y/ISA boards at all addresses in here. If you want the
714 driver to probe addresses at a different address, add it to
715 this table. If the driver is probing some other board and
716 causing problems, remove the offending address from this table.
719 static unsigned int cy_isa_addresses
[] = {
728 0, 0, 0, 0, 0, 0, 0, 0
731 #define NR_ISA_ADDRS ARRAY_SIZE(cy_isa_addresses)
734 static long maddr
[NR_CARDS
];
735 static int irq
[NR_CARDS
];
737 module_param_array(maddr
, long, NULL
, 0);
738 module_param_array(irq
, int, NULL
, 0);
741 #endif /* CONFIG_ISA */
743 /* This is the per-card data structure containing address, irq, number of
744 channels, etc. This driver supports a maximum of NR_CARDS cards.
746 static struct cyclades_card cy_card
[NR_CARDS
];
748 static int cy_next_channel
; /* next minor available */
751 * This is used to look up the divisor speeds and the timeouts
752 * We're normally limited to 15 distinct baud rates. The extra
753 * are accessed via settings in info->port.flags.
754 * 0, 1, 2, 3, 4, 5, 6, 7, 8, 9,
755 * 10, 11, 12, 13, 14, 15, 16, 17, 18, 19,
759 static int baud_table
[] = {
760 0, 50, 75, 110, 134, 150, 200, 300, 600, 1200,
761 1800, 2400, 4800, 9600, 19200, 38400, 57600, 76800, 115200, 150000,
765 static char baud_co_25
[] = { /* 25 MHz clock option table */
766 /* value => 00 01 02 03 04 */
767 /* divide by 8 32 128 512 2048 */
768 0x00, 0x04, 0x04, 0x04, 0x04, 0x04, 0x03, 0x03, 0x03, 0x02,
769 0x02, 0x02, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
772 static char baud_bpr_25
[] = { /* 25 MHz baud rate period table */
773 0x00, 0xf5, 0xa3, 0x6f, 0x5c, 0x51, 0xf5, 0xa3, 0x51, 0xa3,
774 0x6d, 0x51, 0xa3, 0x51, 0xa3, 0x51, 0x36, 0x29, 0x1b, 0x15
777 static char baud_co_60
[] = { /* 60 MHz clock option table (CD1400 J) */
778 /* value => 00 01 02 03 04 */
779 /* divide by 8 32 128 512 2048 */
780 0x00, 0x00, 0x00, 0x04, 0x04, 0x04, 0x04, 0x04, 0x03, 0x03,
781 0x03, 0x02, 0x02, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00,
785 static char baud_bpr_60
[] = { /* 60 MHz baud rate period table (CD1400 J) */
786 0x00, 0x82, 0x21, 0xff, 0xdb, 0xc3, 0x92, 0x62, 0xc3, 0x62,
787 0x41, 0xc3, 0x62, 0xc3, 0x62, 0xc3, 0x82, 0x62, 0x41, 0x32,
791 static char baud_cor3
[] = { /* receive threshold */
792 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a,
793 0x0a, 0x0a, 0x0a, 0x09, 0x09, 0x08, 0x08, 0x08, 0x08, 0x07,
798 * The Cyclades driver implements HW flow control as any serial driver.
799 * The cyclades_port structure member rflow and the vector rflow_thr
800 * allows us to take advantage of a special feature in the CD1400 to avoid
801 * data loss even when the system interrupt latency is too high. These flags
802 * are to be used only with very special applications. Setting these flags
803 * requires the use of a special cable (DTR and RTS reversed). In the new
804 * CD1400-based boards (rev. 6.00 or later), there is no need for special
808 static char rflow_thr
[] = { /* rflow threshold */
809 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
810 0x00, 0x00, 0x00, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a,
814 /* The Cyclom-Ye has placed the sequential chips in non-sequential
815 * address order. This look-up table overcomes that problem.
817 static const unsigned int cy_chip_offset
[] = { 0x0000,
827 /* PCI related definitions */
830 static struct pci_device_id cy_pci_dev_id
[] __devinitdata
= {
832 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES
, PCI_DEVICE_ID_CYCLOM_Y_Lo
) },
834 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES
, PCI_DEVICE_ID_CYCLOM_Y_Hi
) },
836 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES
, PCI_DEVICE_ID_CYCLOM_4Y_Lo
) },
838 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES
, PCI_DEVICE_ID_CYCLOM_4Y_Hi
) },
840 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES
, PCI_DEVICE_ID_CYCLOM_8Y_Lo
) },
842 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES
, PCI_DEVICE_ID_CYCLOM_8Y_Hi
) },
844 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES
, PCI_DEVICE_ID_CYCLOM_Z_Lo
) },
846 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES
, PCI_DEVICE_ID_CYCLOM_Z_Hi
) },
847 { } /* end of table */
849 MODULE_DEVICE_TABLE(pci
, cy_pci_dev_id
);
852 static void cy_start(struct tty_struct
*);
853 static void cy_set_line_char(struct cyclades_port
*, struct tty_struct
*);
854 static int cyz_issue_cmd(struct cyclades_card
*, __u32
, __u8
, __u32
);
856 static unsigned detect_isa_irq(void __iomem
*);
857 #endif /* CONFIG_ISA */
859 #ifndef CONFIG_CYZ_INTR
860 static void cyz_poll(unsigned long);
862 /* The Cyclades-Z polling cycle is defined by this variable */
863 static long cyz_polling_cycle
= CZ_DEF_POLL
;
865 static DEFINE_TIMER(cyz_timerlist
, cyz_poll
, 0, 0);
867 #else /* CONFIG_CYZ_INTR */
868 static void cyz_rx_restart(unsigned long);
869 static struct timer_list cyz_rx_full_timer
[NR_PORTS
];
870 #endif /* CONFIG_CYZ_INTR */
872 static inline bool cy_is_Z(struct cyclades_card
*card
)
874 return card
->num_chips
== (unsigned int)-1;
877 static inline bool __cyz_fpga_loaded(struct RUNTIME_9060 __iomem
*ctl_addr
)
879 return readl(&ctl_addr
->init_ctrl
) & (1 << 17);
882 static inline bool cyz_fpga_loaded(struct cyclades_card
*card
)
884 return __cyz_fpga_loaded(card
->ctl_addr
.p9060
);
887 static inline bool cyz_is_loaded(struct cyclades_card
*card
)
889 struct FIRM_ID __iomem
*fw_id
= card
->base_addr
+ ID_ADDRESS
;
891 return (card
->hw_ver
== ZO_V1
|| cyz_fpga_loaded(card
)) &&
892 readl(&fw_id
->signature
) == ZFIRM_ID
;
895 static inline int serial_paranoia_check(struct cyclades_port
*info
,
896 char *name
, const char *routine
)
898 #ifdef SERIAL_PARANOIA_CHECK
900 printk(KERN_WARNING
"cyc Warning: null cyclades_port for (%s) "
901 "in %s\n", name
, routine
);
905 if (info
->magic
!= CYCLADES_MAGIC
) {
906 printk(KERN_WARNING
"cyc Warning: bad magic number for serial "
907 "struct (%s) in %s\n", name
, routine
);
912 } /* serial_paranoia_check */
914 /***********************************************************/
915 /********* Start of block of Cyclom-Y specific code ********/
917 /* This routine waits up to 1000 micro-seconds for the previous
918 command to the Cirrus chip to complete and then issues the
919 new command. An error is returned if the previous command
920 didn't finish within the time limit.
922 This function is only called from inside spinlock-protected code.
924 static int cyy_issue_cmd(void __iomem
*base_addr
, u_char cmd
, int index
)
928 /* Check to see that the previous command has completed */
929 for (i
= 0; i
< 100; i
++) {
930 if (readb(base_addr
+ (CyCCR
<< index
)) == 0)
934 /* if the CCR never cleared, the previous command
935 didn't finish within the "reasonable time" */
939 /* Issue the new command */
940 cy_writeb(base_addr
+ (CyCCR
<< index
), cmd
);
943 } /* cyy_issue_cmd */
946 /* ISA interrupt detection code */
947 static unsigned detect_isa_irq(void __iomem
*address
)
950 unsigned long irqs
, flags
;
951 int save_xir
, save_car
;
952 int index
= 0; /* IRQ probing is only for ISA */
954 /* forget possible initially masked and pending IRQ */
955 irq
= probe_irq_off(probe_irq_on());
957 /* Clear interrupts on the board first */
958 cy_writeb(address
+ (Cy_ClrIntr
<< index
), 0);
959 /* Cy_ClrIntr is 0x1800 */
961 irqs
= probe_irq_on();
965 /* Enable the Tx interrupts on the CD1400 */
966 local_irq_save(flags
);
967 cy_writeb(address
+ (CyCAR
<< index
), 0);
968 cyy_issue_cmd(address
, CyCHAN_CTL
| CyENB_XMTR
, index
);
970 cy_writeb(address
+ (CyCAR
<< index
), 0);
971 cy_writeb(address
+ (CySRER
<< index
),
972 readb(address
+ (CySRER
<< index
)) | CyTxRdy
);
973 local_irq_restore(flags
);
978 /* Check which interrupt is in use */
979 irq
= probe_irq_off(irqs
);
982 save_xir
= (u_char
) readb(address
+ (CyTIR
<< index
));
983 save_car
= readb(address
+ (CyCAR
<< index
));
984 cy_writeb(address
+ (CyCAR
<< index
), (save_xir
& 0x3));
985 cy_writeb(address
+ (CySRER
<< index
),
986 readb(address
+ (CySRER
<< index
)) & ~CyTxRdy
);
987 cy_writeb(address
+ (CyTIR
<< index
), (save_xir
& 0x3f));
988 cy_writeb(address
+ (CyCAR
<< index
), (save_car
));
989 cy_writeb(address
+ (Cy_ClrIntr
<< index
), 0);
990 /* Cy_ClrIntr is 0x1800 */
992 return (irq
> 0) ? irq
: 0;
994 #endif /* CONFIG_ISA */
996 static void cyy_chip_rx(struct cyclades_card
*cinfo
, int chip
,
997 void __iomem
*base_addr
)
999 struct cyclades_port
*info
;
1000 struct tty_struct
*tty
;
1001 int len
, index
= cinfo
->bus_index
;
1002 u8 save_xir
, channel
, save_car
, data
, char_count
;
1004 #ifdef CY_DEBUG_INTERRUPTS
1005 printk(KERN_DEBUG
"cyy_interrupt: rcvd intr, chip %d\n", chip
);
1007 /* determine the channel & change to that context */
1008 save_xir
= readb(base_addr
+ (CyRIR
<< index
));
1009 channel
= save_xir
& CyIRChannel
;
1010 info
= &cinfo
->ports
[channel
+ chip
* 4];
1011 save_car
= readb(base_addr
+ (CyCAR
<< index
));
1012 cy_writeb(base_addr
+ (CyCAR
<< index
), save_xir
);
1014 tty
= tty_port_tty_get(&info
->port
);
1015 /* if there is nowhere to put the data, discard it */
1017 if ((readb(base_addr
+ (CyRIVR
<< index
)) & CyIVRMask
) ==
1018 CyIVRRxEx
) { /* exception */
1019 data
= readb(base_addr
+ (CyRDSR
<< index
));
1020 } else { /* normal character reception */
1021 char_count
= readb(base_addr
+ (CyRDCR
<< index
));
1022 while (char_count
--)
1023 data
= readb(base_addr
+ (CyRDSR
<< index
));
1027 /* there is an open port for this data */
1028 if ((readb(base_addr
+ (CyRIVR
<< index
)) & CyIVRMask
) ==
1029 CyIVRRxEx
) { /* exception */
1030 data
= readb(base_addr
+ (CyRDSR
<< index
));
1032 /* For statistics only */
1035 else if (data
& CyFRAME
)
1036 info
->icount
.frame
++;
1037 else if (data
& CyPARITY
)
1038 info
->icount
.parity
++;
1039 else if (data
& CyOVERRUN
)
1040 info
->icount
.overrun
++;
1042 if (data
& info
->ignore_status_mask
) {
1047 if (tty_buffer_request_room(tty
, 1)) {
1048 if (data
& info
->read_status_mask
) {
1049 if (data
& CyBREAK
) {
1050 tty_insert_flip_char(tty
,
1051 readb(base_addr
+ (CyRDSR
<<
1052 index
)), TTY_BREAK
);
1054 if (info
->port
.flags
& ASYNC_SAK
)
1056 } else if (data
& CyFRAME
) {
1057 tty_insert_flip_char(tty
,
1058 readb(base_addr
+ (CyRDSR
<<
1059 index
)), TTY_FRAME
);
1061 info
->idle_stats
.frame_errs
++;
1062 } else if (data
& CyPARITY
) {
1063 /* Pieces of seven... */
1064 tty_insert_flip_char(tty
,
1065 readb(base_addr
+ (CyRDSR
<<
1066 index
)), TTY_PARITY
);
1068 info
->idle_stats
.parity_errs
++;
1069 } else if (data
& CyOVERRUN
) {
1070 tty_insert_flip_char(tty
, 0,
1073 /* If the flip buffer itself is
1074 overflowing, we still lose
1075 the next incoming character.
1077 tty_insert_flip_char(tty
,
1078 readb(base_addr
+ (CyRDSR
<<
1079 index
)), TTY_FRAME
);
1081 info
->idle_stats
.overruns
++;
1082 /* These two conditions may imply */
1083 /* a normal read should be done. */
1084 /* } else if(data & CyTIMEOUT) { */
1085 /* } else if(data & CySPECHAR) { */
1087 tty_insert_flip_char(tty
, 0,
1092 tty_insert_flip_char(tty
, 0, TTY_NORMAL
);
1096 /* there was a software buffer overrun and nothing
1097 * could be done about it!!! */
1098 info
->icount
.buf_overrun
++;
1099 info
->idle_stats
.overruns
++;
1101 } else { /* normal character reception */
1102 /* load # chars available from the chip */
1103 char_count
= readb(base_addr
+ (CyRDCR
<< index
));
1105 #ifdef CY_ENABLE_MONITORING
1106 ++info
->mon
.int_count
;
1107 info
->mon
.char_count
+= char_count
;
1108 if (char_count
> info
->mon
.char_max
)
1109 info
->mon
.char_max
= char_count
;
1110 info
->mon
.char_last
= char_count
;
1112 len
= tty_buffer_request_room(tty
, char_count
);
1114 data
= readb(base_addr
+ (CyRDSR
<< index
));
1115 tty_insert_flip_char(tty
, data
, TTY_NORMAL
);
1116 info
->idle_stats
.recv_bytes
++;
1122 info
->idle_stats
.recv_idle
= jiffies
;
1124 tty_schedule_flip(tty
);
1127 /* end of service */
1128 cy_writeb(base_addr
+ (CyRIR
<< index
), save_xir
& 0x3f);
1129 cy_writeb(base_addr
+ (CyCAR
<< index
), save_car
);
1132 static void cyy_chip_tx(struct cyclades_card
*cinfo
, unsigned int chip
,
1133 void __iomem
*base_addr
)
1135 struct cyclades_port
*info
;
1136 struct tty_struct
*tty
;
1137 int char_count
, index
= cinfo
->bus_index
;
1138 u8 save_xir
, channel
, save_car
, outch
;
1140 /* Since we only get here when the transmit buffer
1141 is empty, we know we can always stuff a dozen
1143 #ifdef CY_DEBUG_INTERRUPTS
1144 printk(KERN_DEBUG
"cyy_interrupt: xmit intr, chip %d\n", chip
);
1147 /* determine the channel & change to that context */
1148 save_xir
= readb(base_addr
+ (CyTIR
<< index
));
1149 channel
= save_xir
& CyIRChannel
;
1150 save_car
= readb(base_addr
+ (CyCAR
<< index
));
1151 cy_writeb(base_addr
+ (CyCAR
<< index
), save_xir
);
1153 /* validate the port# (as configured and open) */
1154 if (channel
+ chip
* 4 >= cinfo
->nports
) {
1155 cy_writeb(base_addr
+ (CySRER
<< index
),
1156 readb(base_addr
+ (CySRER
<< index
)) & ~CyTxRdy
);
1159 info
= &cinfo
->ports
[channel
+ chip
* 4];
1160 tty
= tty_port_tty_get(&info
->port
);
1162 cy_writeb(base_addr
+ (CySRER
<< index
),
1163 readb(base_addr
+ (CySRER
<< index
)) & ~CyTxRdy
);
1167 /* load the on-chip space for outbound data */
1168 char_count
= info
->xmit_fifo_size
;
1170 if (info
->x_char
) { /* send special char */
1171 outch
= info
->x_char
;
1172 cy_writeb(base_addr
+ (CyTDR
<< index
), outch
);
1178 if (info
->breakon
|| info
->breakoff
) {
1179 if (info
->breakon
) {
1180 cy_writeb(base_addr
+ (CyTDR
<< index
), 0);
1181 cy_writeb(base_addr
+ (CyTDR
<< index
), 0x81);
1185 if (info
->breakoff
) {
1186 cy_writeb(base_addr
+ (CyTDR
<< index
), 0);
1187 cy_writeb(base_addr
+ (CyTDR
<< index
), 0x83);
1193 while (char_count
-- > 0) {
1194 if (!info
->xmit_cnt
) {
1195 if (readb(base_addr
+ (CySRER
<< index
)) & CyTxMpty
) {
1196 cy_writeb(base_addr
+ (CySRER
<< index
),
1197 readb(base_addr
+ (CySRER
<< index
)) &
1200 cy_writeb(base_addr
+ (CySRER
<< index
),
1201 (readb(base_addr
+ (CySRER
<< index
)) &
1202 ~CyTxRdy
) | CyTxMpty
);
1206 if (info
->port
.xmit_buf
== NULL
) {
1207 cy_writeb(base_addr
+ (CySRER
<< index
),
1208 readb(base_addr
+ (CySRER
<< index
)) &
1212 if (tty
->stopped
|| tty
->hw_stopped
) {
1213 cy_writeb(base_addr
+ (CySRER
<< index
),
1214 readb(base_addr
+ (CySRER
<< index
)) &
1218 /* Because the Embedded Transmit Commands have been enabled,
1219 * we must check to see if the escape character, NULL, is being
1220 * sent. If it is, we must ensure that there is room for it to
1221 * be doubled in the output stream. Therefore we no longer
1222 * advance the pointer when the character is fetched, but
1223 * rather wait until after the check for a NULL output
1224 * character. This is necessary because there may not be room
1225 * for the two chars needed to send a NULL.)
1227 outch
= info
->port
.xmit_buf
[info
->xmit_tail
];
1230 info
->xmit_tail
= (info
->xmit_tail
+ 1) &
1231 (SERIAL_XMIT_SIZE
- 1);
1232 cy_writeb(base_addr
+ (CyTDR
<< index
), outch
);
1235 if (char_count
> 1) {
1237 info
->xmit_tail
= (info
->xmit_tail
+ 1) &
1238 (SERIAL_XMIT_SIZE
- 1);
1239 cy_writeb(base_addr
+ (CyTDR
<< index
), outch
);
1240 cy_writeb(base_addr
+ (CyTDR
<< index
), 0);
1251 /* end of service */
1252 cy_writeb(base_addr
+ (CyTIR
<< index
), save_xir
& 0x3f);
1253 cy_writeb(base_addr
+ (CyCAR
<< index
), save_car
);
1256 static void cyy_chip_modem(struct cyclades_card
*cinfo
, int chip
,
1257 void __iomem
*base_addr
)
1259 struct cyclades_port
*info
;
1260 struct tty_struct
*tty
;
1261 int index
= cinfo
->bus_index
;
1262 u8 save_xir
, channel
, save_car
, mdm_change
, mdm_status
;
1264 /* determine the channel & change to that context */
1265 save_xir
= readb(base_addr
+ (CyMIR
<< index
));
1266 channel
= save_xir
& CyIRChannel
;
1267 info
= &cinfo
->ports
[channel
+ chip
* 4];
1268 save_car
= readb(base_addr
+ (CyCAR
<< index
));
1269 cy_writeb(base_addr
+ (CyCAR
<< index
), save_xir
);
1271 mdm_change
= readb(base_addr
+ (CyMISR
<< index
));
1272 mdm_status
= readb(base_addr
+ (CyMSVR1
<< index
));
1274 tty
= tty_port_tty_get(&info
->port
);
1278 if (mdm_change
& CyANY_DELTA
) {
1279 /* For statistics only */
1280 if (mdm_change
& CyDCD
)
1282 if (mdm_change
& CyCTS
)
1284 if (mdm_change
& CyDSR
)
1286 if (mdm_change
& CyRI
)
1289 wake_up_interruptible(&info
->delta_msr_wait
);
1292 if ((mdm_change
& CyDCD
) && (info
->port
.flags
& ASYNC_CHECK_CD
)) {
1293 if (mdm_status
& CyDCD
)
1294 wake_up_interruptible(&info
->port
.open_wait
);
1298 if ((mdm_change
& CyCTS
) && (info
->port
.flags
& ASYNC_CTS_FLOW
)) {
1299 if (tty
->hw_stopped
) {
1300 if (mdm_status
& CyCTS
) {
1301 /* cy_start isn't used
1303 tty
->hw_stopped
= 0;
1304 cy_writeb(base_addr
+ (CySRER
<< index
),
1305 readb(base_addr
+ (CySRER
<< index
)) |
1310 if (!(mdm_status
& CyCTS
)) {
1311 /* cy_stop isn't used
1313 tty
->hw_stopped
= 1;
1314 cy_writeb(base_addr
+ (CySRER
<< index
),
1315 readb(base_addr
+ (CySRER
<< index
)) &
1320 /* if (mdm_change & CyDSR) {
1322 if (mdm_change & CyRI) {
1326 /* end of service */
1327 cy_writeb(base_addr
+ (CyMIR
<< index
), save_xir
& 0x3f);
1328 cy_writeb(base_addr
+ (CyCAR
<< index
), save_car
);
1331 /* The real interrupt service routine is called
1332 whenever the card wants its hand held--chars
1333 received, out buffer empty, modem change, etc.
1335 static irqreturn_t
cyy_interrupt(int irq
, void *dev_id
)
1338 struct cyclades_card
*cinfo
= dev_id
;
1339 void __iomem
*base_addr
, *card_base_addr
;
1340 unsigned int chip
, too_many
, had_work
;
1343 if (unlikely(cinfo
== NULL
)) {
1344 #ifdef CY_DEBUG_INTERRUPTS
1345 printk(KERN_DEBUG
"cyy_interrupt: spurious interrupt %d\n",
1348 return IRQ_NONE
; /* spurious interrupt */
1351 card_base_addr
= cinfo
->base_addr
;
1352 index
= cinfo
->bus_index
;
1354 /* card was not initialized yet (e.g. DEBUG_SHIRQ) */
1355 if (unlikely(card_base_addr
== NULL
))
1358 /* This loop checks all chips in the card. Make a note whenever
1359 _any_ chip had some work to do, as this is considered an
1360 indication that there will be more to do. Only when no chip
1361 has any work does this outermost loop exit.
1365 for (chip
= 0; chip
< cinfo
->num_chips
; chip
++) {
1366 base_addr
= cinfo
->base_addr
+
1367 (cy_chip_offset
[chip
] << index
);
1369 while ((status
= readb(base_addr
+
1370 (CySVRR
<< index
))) != 0x00) {
1372 /* The purpose of the following test is to ensure that
1373 no chip can monopolize the driver. This forces the
1374 chips to be checked in a round-robin fashion (after
1375 draining each of a bunch (1000) of characters).
1377 if (1000 < too_many
++)
1379 spin_lock(&cinfo
->card_lock
);
1380 if (status
& CySRReceive
) /* rx intr */
1381 cyy_chip_rx(cinfo
, chip
, base_addr
);
1382 if (status
& CySRTransmit
) /* tx intr */
1383 cyy_chip_tx(cinfo
, chip
, base_addr
);
1384 if (status
& CySRModem
) /* modem intr */
1385 cyy_chip_modem(cinfo
, chip
, base_addr
);
1386 spin_unlock(&cinfo
->card_lock
);
1391 /* clear interrupts */
1392 spin_lock(&cinfo
->card_lock
);
1393 cy_writeb(card_base_addr
+ (Cy_ClrIntr
<< index
), 0);
1394 /* Cy_ClrIntr is 0x1800 */
1395 spin_unlock(&cinfo
->card_lock
);
1397 } /* cyy_interrupt */
1399 /***********************************************************/
1400 /********* End of block of Cyclom-Y specific code **********/
1401 /******** Start of block of Cyclades-Z specific code *******/
1402 /***********************************************************/
1405 cyz_fetch_msg(struct cyclades_card
*cinfo
,
1406 __u32
*channel
, __u8
*cmd
, __u32
*param
)
1408 struct BOARD_CTRL __iomem
*board_ctrl
= cinfo
->board_ctrl
;
1409 unsigned long loc_doorbell
;
1411 loc_doorbell
= readl(&cinfo
->ctl_addr
.p9060
->loc_doorbell
);
1413 *cmd
= (char)(0xff & loc_doorbell
);
1414 *channel
= readl(&board_ctrl
->fwcmd_channel
);
1415 *param
= (__u32
) readl(&board_ctrl
->fwcmd_param
);
1416 cy_writel(&cinfo
->ctl_addr
.p9060
->loc_doorbell
, 0xffffffff);
1420 } /* cyz_fetch_msg */
1423 cyz_issue_cmd(struct cyclades_card
*cinfo
,
1424 __u32 channel
, __u8 cmd
, __u32 param
)
1426 struct BOARD_CTRL __iomem
*board_ctrl
= cinfo
->board_ctrl
;
1427 __u32 __iomem
*pci_doorbell
;
1430 if (!cyz_is_loaded(cinfo
))
1434 pci_doorbell
= &cinfo
->ctl_addr
.p9060
->pci_doorbell
;
1435 while ((readl(pci_doorbell
) & 0xff) != 0) {
1436 if (index
++ == 1000)
1437 return (int)(readl(pci_doorbell
) & 0xff);
1440 cy_writel(&board_ctrl
->hcmd_channel
, channel
);
1441 cy_writel(&board_ctrl
->hcmd_param
, param
);
1442 cy_writel(pci_doorbell
, (long)cmd
);
1445 } /* cyz_issue_cmd */
1447 static void cyz_handle_rx(struct cyclades_port
*info
, struct tty_struct
*tty
)
1449 struct BUF_CTRL __iomem
*buf_ctrl
= info
->u
.cyz
.buf_ctrl
;
1450 struct cyclades_card
*cinfo
= info
->card
;
1451 unsigned int char_count
;
1458 __u32 rx_put
, rx_get
, new_rx_get
, rx_bufsize
, rx_bufaddr
;
1460 rx_get
= new_rx_get
= readl(&buf_ctrl
->rx_get
);
1461 rx_put
= readl(&buf_ctrl
->rx_put
);
1462 rx_bufsize
= readl(&buf_ctrl
->rx_bufsize
);
1463 rx_bufaddr
= readl(&buf_ctrl
->rx_bufaddr
);
1464 if (rx_put
>= rx_get
)
1465 char_count
= rx_put
- rx_get
;
1467 char_count
= rx_put
- rx_get
+ rx_bufsize
;
1470 #ifdef CY_ENABLE_MONITORING
1471 info
->mon
.int_count
++;
1472 info
->mon
.char_count
+= char_count
;
1473 if (char_count
> info
->mon
.char_max
)
1474 info
->mon
.char_max
= char_count
;
1475 info
->mon
.char_last
= char_count
;
1478 /* flush received characters */
1479 new_rx_get
= (new_rx_get
+ char_count
) &
1481 info
->rflush_count
++;
1484 /* we'd like to use memcpy(t, f, n) and memset(s, c, count)
1485 for performance, but because of buffer boundaries, there
1486 may be several steps to the operation */
1488 len
= tty_prepare_flip_string(tty
, &buf
,
1493 len
= min_t(unsigned int, min(len
, char_count
),
1494 rx_bufsize
- new_rx_get
);
1496 memcpy_fromio(buf
, cinfo
->base_addr
+
1497 rx_bufaddr
+ new_rx_get
, len
);
1499 new_rx_get
= (new_rx_get
+ len
) &
1502 info
->icount
.rx
+= len
;
1503 info
->idle_stats
.recv_bytes
+= len
;
1506 len
= tty_buffer_request_room(tty
, char_count
);
1508 data
= readb(cinfo
->base_addr
+ rx_bufaddr
+
1510 new_rx_get
= (new_rx_get
+ 1) &
1512 tty_insert_flip_char(tty
, data
, TTY_NORMAL
);
1513 info
->idle_stats
.recv_bytes
++;
1517 #ifdef CONFIG_CYZ_INTR
1518 /* Recalculate the number of chars in the RX buffer and issue
1519 a cmd in case it's higher than the RX high water mark */
1520 rx_put
= readl(&buf_ctrl
->rx_put
);
1521 if (rx_put
>= rx_get
)
1522 char_count
= rx_put
- rx_get
;
1524 char_count
= rx_put
- rx_get
+ rx_bufsize
;
1525 if (char_count
>= readl(&buf_ctrl
->rx_threshold
) &&
1526 !timer_pending(&cyz_rx_full_timer
[
1528 mod_timer(&cyz_rx_full_timer
[info
->line
],
1531 info
->idle_stats
.recv_idle
= jiffies
;
1532 tty_schedule_flip(tty
);
1535 cy_writel(&buf_ctrl
->rx_get
, new_rx_get
);
1539 static void cyz_handle_tx(struct cyclades_port
*info
, struct tty_struct
*tty
)
1541 struct BUF_CTRL __iomem
*buf_ctrl
= info
->u
.cyz
.buf_ctrl
;
1542 struct cyclades_card
*cinfo
= info
->card
;
1544 unsigned int char_count
;
1548 __u32 tx_put
, tx_get
, tx_bufsize
, tx_bufaddr
;
1550 if (info
->xmit_cnt
<= 0) /* Nothing to transmit */
1553 tx_get
= readl(&buf_ctrl
->tx_get
);
1554 tx_put
= readl(&buf_ctrl
->tx_put
);
1555 tx_bufsize
= readl(&buf_ctrl
->tx_bufsize
);
1556 tx_bufaddr
= readl(&buf_ctrl
->tx_bufaddr
);
1557 if (tx_put
>= tx_get
)
1558 char_count
= tx_get
- tx_put
- 1 + tx_bufsize
;
1560 char_count
= tx_get
- tx_put
- 1;
1567 if (info
->x_char
) { /* send special char */
1568 data
= info
->x_char
;
1570 cy_writeb(cinfo
->base_addr
+ tx_bufaddr
+ tx_put
, data
);
1571 tx_put
= (tx_put
+ 1) & (tx_bufsize
- 1);
1577 while (0 < (small_count
= min_t(unsigned int,
1578 tx_bufsize
- tx_put
, min_t(unsigned int,
1579 (SERIAL_XMIT_SIZE
- info
->xmit_tail
),
1580 min_t(unsigned int, info
->xmit_cnt
,
1583 memcpy_toio((char *)(cinfo
->base_addr
+ tx_bufaddr
+
1585 &info
->port
.xmit_buf
[info
->xmit_tail
],
1588 tx_put
= (tx_put
+ small_count
) & (tx_bufsize
- 1);
1589 char_count
-= small_count
;
1590 info
->icount
.tx
+= small_count
;
1591 info
->xmit_cnt
-= small_count
;
1592 info
->xmit_tail
= (info
->xmit_tail
+ small_count
) &
1593 (SERIAL_XMIT_SIZE
- 1);
1596 while (info
->xmit_cnt
&& char_count
) {
1597 data
= info
->port
.xmit_buf
[info
->xmit_tail
];
1599 info
->xmit_tail
= (info
->xmit_tail
+ 1) &
1600 (SERIAL_XMIT_SIZE
- 1);
1602 cy_writeb(cinfo
->base_addr
+ tx_bufaddr
+ tx_put
, data
);
1603 tx_put
= (tx_put
+ 1) & (tx_bufsize
- 1);
1611 cy_writel(&buf_ctrl
->tx_put
, tx_put
);
1615 static void cyz_handle_cmd(struct cyclades_card
*cinfo
)
1617 struct BOARD_CTRL __iomem
*board_ctrl
= cinfo
->board_ctrl
;
1618 struct tty_struct
*tty
;
1619 struct cyclades_port
*info
;
1620 __u32 channel
, param
, fw_ver
;
1625 fw_ver
= readl(&board_ctrl
->fw_version
);
1627 while (cyz_fetch_msg(cinfo
, &channel
, &cmd
, ¶m
) == 1) {
1630 info
= &cinfo
->ports
[channel
];
1631 tty
= tty_port_tty_get(&info
->port
);
1637 tty_insert_flip_char(tty
, 0, TTY_PARITY
);
1642 tty_insert_flip_char(tty
, 0, TTY_FRAME
);
1647 tty_insert_flip_char(tty
, 0, TTY_BREAK
);
1654 if (info
->port
.flags
& ASYNC_CHECK_CD
) {
1655 u32 dcd
= fw_ver
> 241 ? param
:
1656 readl(&info
->u
.cyz
.ch_ctrl
->rs_status
);
1658 wake_up_interruptible(&info
->port
.open_wait
);
1677 complete(&info
->shutdown_wait
);
1680 #ifdef CONFIG_CYZ_INTR
1684 /* Reception Interrupt */
1685 #ifdef CY_DEBUG_INTERRUPTS
1686 printk(KERN_DEBUG
"cyz_interrupt: rcvd intr, card %d, "
1687 "port %ld\n", info
->card
, channel
);
1689 cyz_handle_rx(info
, tty
);
1694 /* Transmission Interrupt */
1695 #ifdef CY_DEBUG_INTERRUPTS
1696 printk(KERN_DEBUG
"cyz_interrupt: xmit intr, card %d, "
1697 "port %ld\n", info
->card
, channel
);
1699 cyz_handle_tx(info
, tty
);
1701 #endif /* CONFIG_CYZ_INTR */
1703 /* should do something with this !!! */
1709 wake_up_interruptible(&info
->delta_msr_wait
);
1711 tty_schedule_flip(tty
);
1716 #ifdef CONFIG_CYZ_INTR
1717 static irqreturn_t
cyz_interrupt(int irq
, void *dev_id
)
1719 struct cyclades_card
*cinfo
= dev_id
;
1721 if (unlikely(!cyz_is_loaded(cinfo
))) {
1722 #ifdef CY_DEBUG_INTERRUPTS
1723 printk(KERN_DEBUG
"cyz_interrupt: board not yet loaded "
1729 /* Handle the interrupts */
1730 cyz_handle_cmd(cinfo
);
1733 } /* cyz_interrupt */
1735 static void cyz_rx_restart(unsigned long arg
)
1737 struct cyclades_port
*info
= (struct cyclades_port
*)arg
;
1738 struct cyclades_card
*card
= info
->card
;
1740 __u32 channel
= info
->line
- card
->first_line
;
1741 unsigned long flags
;
1743 spin_lock_irqsave(&card
->card_lock
, flags
);
1744 retval
= cyz_issue_cmd(card
, channel
, C_CM_INTBACK2
, 0L);
1746 printk(KERN_ERR
"cyc:cyz_rx_restart retval on ttyC%d was %x\n",
1747 info
->line
, retval
);
1749 spin_unlock_irqrestore(&card
->card_lock
, flags
);
1752 #else /* CONFIG_CYZ_INTR */
1754 static void cyz_poll(unsigned long arg
)
1756 struct cyclades_card
*cinfo
;
1757 struct cyclades_port
*info
;
1758 unsigned long expires
= jiffies
+ HZ
;
1759 unsigned int port
, card
;
1761 for (card
= 0; card
< NR_CARDS
; card
++) {
1762 cinfo
= &cy_card
[card
];
1764 if (!cy_is_Z(cinfo
))
1766 if (!cyz_is_loaded(cinfo
))
1769 /* Skip first polling cycle to avoid racing conditions with the FW */
1770 if (!cinfo
->intr_enabled
) {
1771 cinfo
->intr_enabled
= 1;
1775 cyz_handle_cmd(cinfo
);
1777 for (port
= 0; port
< cinfo
->nports
; port
++) {
1778 struct tty_struct
*tty
;
1780 info
= &cinfo
->ports
[port
];
1781 tty
= tty_port_tty_get(&info
->port
);
1782 /* OK to pass NULL to the handle functions below.
1783 They need to drop the data in that case. */
1785 if (!info
->throttle
)
1786 cyz_handle_rx(info
, tty
);
1787 cyz_handle_tx(info
, tty
);
1790 /* poll every 'cyz_polling_cycle' period */
1791 expires
= jiffies
+ cyz_polling_cycle
;
1793 mod_timer(&cyz_timerlist
, expires
);
1796 #endif /* CONFIG_CYZ_INTR */
1798 /********** End of block of Cyclades-Z specific code *********/
1799 /***********************************************************/
1801 /* This is called whenever a port becomes active;
1802 interrupts are enabled and DTR & RTS are turned on.
1804 static int cy_startup(struct cyclades_port
*info
, struct tty_struct
*tty
)
1806 struct cyclades_card
*card
;
1807 unsigned long flags
;
1809 void __iomem
*base_addr
;
1810 int chip
, channel
, index
;
1814 channel
= info
->line
- card
->first_line
;
1816 page
= get_zeroed_page(GFP_KERNEL
);
1820 spin_lock_irqsave(&card
->card_lock
, flags
);
1822 if (info
->port
.flags
& ASYNC_INITIALIZED
) {
1828 set_bit(TTY_IO_ERROR
, &tty
->flags
);
1833 if (info
->port
.xmit_buf
)
1836 info
->port
.xmit_buf
= (unsigned char *)page
;
1838 spin_unlock_irqrestore(&card
->card_lock
, flags
);
1840 cy_set_line_char(info
, tty
);
1842 if (!cy_is_Z(card
)) {
1843 chip
= channel
>> 2;
1845 index
= card
->bus_index
;
1846 base_addr
= card
->base_addr
+ (cy_chip_offset
[chip
] << index
);
1848 #ifdef CY_DEBUG_OPEN
1849 printk(KERN_DEBUG
"cyc startup card %d, chip %d, channel %d, "
1851 card
, chip
, channel
, base_addr
);
1853 spin_lock_irqsave(&card
->card_lock
, flags
);
1855 cy_writeb(base_addr
+ (CyCAR
<< index
), (u_char
) channel
);
1857 cy_writeb(base_addr
+ (CyRTPR
<< index
),
1858 (info
->default_timeout
? info
->default_timeout
: 0x02));
1859 /* 10ms rx timeout */
1861 cyy_issue_cmd(base_addr
, CyCHAN_CTL
| CyENB_RCVR
| CyENB_XMTR
,
1864 cy_writeb(base_addr
+ (CyCAR
<< index
), (u_char
) channel
);
1865 cy_writeb(base_addr
+ (CyMSVR1
<< index
), CyRTS
);
1866 cy_writeb(base_addr
+ (CyMSVR2
<< index
), CyDTR
);
1869 printk(KERN_DEBUG
"cyc:startup raising DTR\n");
1870 printk(KERN_DEBUG
" status: 0x%x, 0x%x\n",
1871 readb(base_addr
+ (CyMSVR1
<< index
)),
1872 readb(base_addr
+ (CyMSVR2
<< index
)));
1875 cy_writeb(base_addr
+ (CySRER
<< index
),
1876 readb(base_addr
+ (CySRER
<< index
)) | CyRxData
);
1877 info
->port
.flags
|= ASYNC_INITIALIZED
;
1879 clear_bit(TTY_IO_ERROR
, &tty
->flags
);
1880 info
->xmit_cnt
= info
->xmit_head
= info
->xmit_tail
= 0;
1881 info
->breakon
= info
->breakoff
= 0;
1882 memset((char *)&info
->idle_stats
, 0, sizeof(info
->idle_stats
));
1883 info
->idle_stats
.in_use
=
1884 info
->idle_stats
.recv_idle
=
1885 info
->idle_stats
.xmit_idle
= jiffies
;
1887 spin_unlock_irqrestore(&card
->card_lock
, flags
);
1890 struct CH_CTRL __iomem
*ch_ctrl
= info
->u
.cyz
.ch_ctrl
;
1892 if (!cyz_is_loaded(card
))
1895 #ifdef CY_DEBUG_OPEN
1896 printk(KERN_DEBUG
"cyc startup Z card %d, channel %d, "
1897 "base_addr %p\n", card
, channel
, card
->base_addr
);
1899 spin_lock_irqsave(&card
->card_lock
, flags
);
1901 cy_writel(&ch_ctrl
->op_mode
, C_CH_ENABLE
);
1903 #ifdef CONFIG_CYZ_INTR
1904 cy_writel(&ch_ctrl
->intr_enable
,
1905 C_IN_TXBEMPTY
| C_IN_TXLOWWM
| C_IN_RXHIWM
|
1906 C_IN_RXNNDT
| C_IN_IOCTLW
| C_IN_MDCD
);
1908 cy_writel(&ch_ctrl
->intr_enable
,
1909 C_IN_IOCTLW
| C_IN_MDCD
);
1910 #endif /* CONFIG_CYZ_INTR */
1912 #ifdef CONFIG_CYZ_INTR
1913 cy_writel(&ch_ctrl
->intr_enable
,
1914 C_IN_TXBEMPTY
| C_IN_TXLOWWM
| C_IN_RXHIWM
|
1915 C_IN_RXNNDT
| C_IN_MDCD
);
1917 cy_writel(&ch_ctrl
->intr_enable
, C_IN_MDCD
);
1918 #endif /* CONFIG_CYZ_INTR */
1921 retval
= cyz_issue_cmd(card
, channel
, C_CM_IOCTL
, 0L);
1923 printk(KERN_ERR
"cyc:startup(1) retval on ttyC%d was "
1924 "%x\n", info
->line
, retval
);
1927 /* Flush RX buffers before raising DTR and RTS */
1928 retval
= cyz_issue_cmd(card
, channel
, C_CM_FLUSH_RX
, 0L);
1930 printk(KERN_ERR
"cyc:startup(2) retval on ttyC%d was "
1931 "%x\n", info
->line
, retval
);
1934 /* set timeout !!! */
1935 /* set RTS and DTR !!! */
1936 cy_writel(&ch_ctrl
->rs_control
, readl(&ch_ctrl
->rs_control
) |
1937 C_RS_RTS
| C_RS_DTR
);
1938 retval
= cyz_issue_cmd(card
, channel
, C_CM_IOCTLM
, 0L);
1940 printk(KERN_ERR
"cyc:startup(3) retval on ttyC%d was "
1941 "%x\n", info
->line
, retval
);
1944 printk(KERN_DEBUG
"cyc:startup raising Z DTR\n");
1947 /* enable send, recv, modem !!! */
1949 info
->port
.flags
|= ASYNC_INITIALIZED
;
1950 clear_bit(TTY_IO_ERROR
, &tty
->flags
);
1951 info
->xmit_cnt
= info
->xmit_head
= info
->xmit_tail
= 0;
1952 info
->breakon
= info
->breakoff
= 0;
1953 memset((char *)&info
->idle_stats
, 0, sizeof(info
->idle_stats
));
1954 info
->idle_stats
.in_use
=
1955 info
->idle_stats
.recv_idle
=
1956 info
->idle_stats
.xmit_idle
= jiffies
;
1958 spin_unlock_irqrestore(&card
->card_lock
, flags
);
1961 #ifdef CY_DEBUG_OPEN
1962 printk(KERN_DEBUG
"cyc startup done\n");
1967 spin_unlock_irqrestore(&card
->card_lock
, flags
);
1971 static void start_xmit(struct cyclades_port
*info
)
1973 struct cyclades_card
*card
;
1974 unsigned long flags
;
1975 void __iomem
*base_addr
;
1976 int chip
, channel
, index
;
1979 channel
= info
->line
- card
->first_line
;
1980 if (!cy_is_Z(card
)) {
1981 chip
= channel
>> 2;
1983 index
= card
->bus_index
;
1984 base_addr
= card
->base_addr
+ (cy_chip_offset
[chip
] << index
);
1986 spin_lock_irqsave(&card
->card_lock
, flags
);
1987 cy_writeb(base_addr
+ (CyCAR
<< index
), channel
);
1988 cy_writeb(base_addr
+ (CySRER
<< index
),
1989 readb(base_addr
+ (CySRER
<< index
)) | CyTxRdy
);
1990 spin_unlock_irqrestore(&card
->card_lock
, flags
);
1992 #ifdef CONFIG_CYZ_INTR
1995 spin_lock_irqsave(&card
->card_lock
, flags
);
1996 retval
= cyz_issue_cmd(card
, channel
, C_CM_INTBACK
, 0L);
1998 printk(KERN_ERR
"cyc:start_xmit retval on ttyC%d was "
1999 "%x\n", info
->line
, retval
);
2001 spin_unlock_irqrestore(&card
->card_lock
, flags
);
2002 #else /* CONFIG_CYZ_INTR */
2003 /* Don't have to do anything at this time */
2004 #endif /* CONFIG_CYZ_INTR */
2009 * This routine shuts down a serial port; interrupts are disabled,
2010 * and DTR is dropped if the hangup on close termio flag is on.
2012 static void cy_shutdown(struct cyclades_port
*info
, struct tty_struct
*tty
)
2014 struct cyclades_card
*card
;
2015 unsigned long flags
;
2016 void __iomem
*base_addr
;
2017 int chip
, channel
, index
;
2019 if (!(info
->port
.flags
& ASYNC_INITIALIZED
))
2023 channel
= info
->line
- card
->first_line
;
2024 if (!cy_is_Z(card
)) {
2025 chip
= channel
>> 2;
2027 index
= card
->bus_index
;
2028 base_addr
= card
->base_addr
+ (cy_chip_offset
[chip
] << index
);
2030 #ifdef CY_DEBUG_OPEN
2031 printk(KERN_DEBUG
"cyc shutdown Y card %d, chip %d, "
2032 "channel %d, base_addr %p\n",
2033 card
, chip
, channel
, base_addr
);
2036 spin_lock_irqsave(&card
->card_lock
, flags
);
2038 /* Clear delta_msr_wait queue to avoid mem leaks. */
2039 wake_up_interruptible(&info
->delta_msr_wait
);
2041 if (info
->port
.xmit_buf
) {
2042 unsigned char *temp
;
2043 temp
= info
->port
.xmit_buf
;
2044 info
->port
.xmit_buf
= NULL
;
2045 free_page((unsigned long)temp
);
2047 cy_writeb(base_addr
+ (CyCAR
<< index
), (u_char
) channel
);
2048 if (tty
->termios
->c_cflag
& HUPCL
) {
2049 cy_writeb(base_addr
+ (CyMSVR1
<< index
), ~CyRTS
);
2050 cy_writeb(base_addr
+ (CyMSVR2
<< index
), ~CyDTR
);
2052 printk(KERN_DEBUG
"cyc shutdown dropping DTR\n");
2053 printk(KERN_DEBUG
" status: 0x%x, 0x%x\n",
2054 readb(base_addr
+ (CyMSVR1
<< index
)),
2055 readb(base_addr
+ (CyMSVR2
<< index
)));
2058 cyy_issue_cmd(base_addr
, CyCHAN_CTL
| CyDIS_RCVR
, index
);
2059 /* it may be appropriate to clear _XMIT at
2060 some later date (after testing)!!! */
2062 set_bit(TTY_IO_ERROR
, &tty
->flags
);
2063 info
->port
.flags
&= ~ASYNC_INITIALIZED
;
2064 spin_unlock_irqrestore(&card
->card_lock
, flags
);
2066 struct CH_CTRL __iomem
*ch_ctrl
= info
->u
.cyz
.ch_ctrl
;
2069 #ifdef CY_DEBUG_OPEN
2070 printk(KERN_DEBUG
"cyc shutdown Z card %d, channel %d, "
2071 "base_addr %p\n", card
, channel
, card
->base_addr
);
2074 if (!cyz_is_loaded(card
))
2077 spin_lock_irqsave(&card
->card_lock
, flags
);
2079 if (info
->port
.xmit_buf
) {
2080 unsigned char *temp
;
2081 temp
= info
->port
.xmit_buf
;
2082 info
->port
.xmit_buf
= NULL
;
2083 free_page((unsigned long)temp
);
2086 if (tty
->termios
->c_cflag
& HUPCL
) {
2087 cy_writel(&ch_ctrl
->rs_control
,
2088 readl(&ch_ctrl
->rs_control
) &
2089 ~(C_RS_RTS
| C_RS_DTR
));
2090 retval
= cyz_issue_cmd(info
->card
, channel
,
2093 printk(KERN_ERR
"cyc:shutdown retval on ttyC%d "
2094 "was %x\n", info
->line
, retval
);
2097 printk(KERN_DEBUG
"cyc:shutdown dropping Z DTR\n");
2101 set_bit(TTY_IO_ERROR
, &tty
->flags
);
2102 info
->port
.flags
&= ~ASYNC_INITIALIZED
;
2104 spin_unlock_irqrestore(&card
->card_lock
, flags
);
2107 #ifdef CY_DEBUG_OPEN
2108 printk(KERN_DEBUG
"cyc shutdown done\n");
2113 * ------------------------------------------------------------
2114 * cy_open() and friends
2115 * ------------------------------------------------------------
2119 * This routine is called whenever a serial port is opened. It
2120 * performs the serial-specific initialization for the tty structure.
2122 static int cy_open(struct tty_struct
*tty
, struct file
*filp
)
2124 struct cyclades_port
*info
;
2125 unsigned int i
, line
;
2129 if (tty
->index
< 0 || NR_PORTS
<= line
)
2132 for (i
= 0; i
< NR_CARDS
; i
++)
2133 if (line
< cy_card
[i
].first_line
+ cy_card
[i
].nports
&&
2134 line
>= cy_card
[i
].first_line
)
2138 info
= &cy_card
[i
].ports
[line
- cy_card
[i
].first_line
];
2142 /* If the card's firmware hasn't been loaded,
2143 treat it as absent from the system. This
2144 will make the user pay attention.
2146 if (cy_is_Z(info
->card
)) {
2147 struct cyclades_card
*cinfo
= info
->card
;
2148 struct FIRM_ID __iomem
*firm_id
= cinfo
->base_addr
+ ID_ADDRESS
;
2150 if (!cyz_is_loaded(cinfo
)) {
2151 if (cinfo
->hw_ver
== ZE_V1
&& cyz_fpga_loaded(cinfo
) &&
2152 readl(&firm_id
->signature
) ==
2154 printk(KERN_ERR
"cyc:Cyclades-Z Error: you "
2155 "need an external power supply for "
2156 "this number of ports.\nFirmware "
2159 printk(KERN_ERR
"cyc:Cyclades-Z firmware not "
2164 #ifdef CONFIG_CYZ_INTR
2166 /* In case this Z board is operating in interrupt mode, its
2167 interrupts should be enabled as soon as the first open
2168 happens to one of its ports. */
2169 if (!cinfo
->intr_enabled
) {
2172 /* Enable interrupts on the PLX chip */
2173 intr
= readw(&cinfo
->ctl_addr
.p9060
->
2174 intr_ctrl_stat
) | 0x0900;
2175 cy_writew(&cinfo
->ctl_addr
.p9060
->
2176 intr_ctrl_stat
, intr
);
2177 /* Enable interrupts on the FW */
2178 retval
= cyz_issue_cmd(cinfo
, 0,
2181 printk(KERN_ERR
"cyc:IRQ enable retval "
2182 "was %x\n", retval
);
2184 cinfo
->intr_enabled
= 1;
2187 #endif /* CONFIG_CYZ_INTR */
2188 /* Make sure this Z port really exists in hardware */
2189 if (info
->line
> (cinfo
->first_line
+ cinfo
->nports
- 1))
2192 #ifdef CY_DEBUG_OTHER
2193 printk(KERN_DEBUG
"cyc:cy_open ttyC%d\n", info
->line
);
2195 tty
->driver_data
= info
;
2196 if (serial_paranoia_check(info
, tty
->name
, "cy_open"))
2199 #ifdef CY_DEBUG_OPEN
2200 printk(KERN_DEBUG
"cyc:cy_open ttyC%d, count = %d\n", info
->line
,
2204 #ifdef CY_DEBUG_COUNT
2205 printk(KERN_DEBUG
"cyc:cy_open (%d): incrementing count to %d\n",
2206 current
->pid
, info
->port
.count
);
2210 * If the port is the middle of closing, bail out now
2212 if (tty_hung_up_p(filp
) || (info
->port
.flags
& ASYNC_CLOSING
)) {
2213 wait_event_interruptible(info
->port
.close_wait
,
2214 !(info
->port
.flags
& ASYNC_CLOSING
));
2215 return (info
->port
.flags
& ASYNC_HUP_NOTIFY
) ? -EAGAIN
: -ERESTARTSYS
;
2219 * Start up serial port
2221 retval
= cy_startup(info
, tty
);
2225 retval
= tty_port_block_til_ready(&info
->port
, tty
, filp
);
2227 #ifdef CY_DEBUG_OPEN
2228 printk(KERN_DEBUG
"cyc:cy_open returning after block_til_ready "
2229 "with %d\n", retval
);
2235 tty_port_tty_set(&info
->port
, tty
);
2237 #ifdef CY_DEBUG_OPEN
2238 printk(KERN_DEBUG
"cyc:cy_open done\n");
2244 * cy_wait_until_sent() --- wait until the transmitter is empty
2246 static void cy_wait_until_sent(struct tty_struct
*tty
, int timeout
)
2248 struct cyclades_card
*card
;
2249 struct cyclades_port
*info
= tty
->driver_data
;
2250 void __iomem
*base_addr
;
2251 int chip
, channel
, index
;
2252 unsigned long orig_jiffies
;
2255 if (serial_paranoia_check(info
, tty
->name
, "cy_wait_until_sent"))
2258 if (info
->xmit_fifo_size
== 0)
2259 return; /* Just in case.... */
2261 orig_jiffies
= jiffies
;
2264 * Set the check interval to be 1/5 of the estimated time to
2265 * send a single character, and make it at least 1. The check
2266 * interval should also be less than the timeout.
2268 * Note: we have to use pretty tight timings here to satisfy
2271 char_time
= (info
->timeout
- HZ
/ 50) / info
->xmit_fifo_size
;
2272 char_time
= char_time
/ 5;
2278 char_time
= min(char_time
, timeout
);
2280 * If the transmitter hasn't cleared in twice the approximate
2281 * amount of time to send the entire FIFO, it probably won't
2282 * ever clear. This assumes the UART isn't doing flow
2283 * control, which is currently the case. Hence, if it ever
2284 * takes longer than info->timeout, this is probably due to a
2285 * UART bug of some kind. So, we clamp the timeout parameter at
2288 if (!timeout
|| timeout
> 2 * info
->timeout
)
2289 timeout
= 2 * info
->timeout
;
2290 #ifdef CY_DEBUG_WAIT_UNTIL_SENT
2291 printk(KERN_DEBUG
"In cy_wait_until_sent(%d) check=%d, jiff=%lu...",
2292 timeout
, char_time
, jiffies
);
2295 channel
= (info
->line
) - (card
->first_line
);
2296 if (!cy_is_Z(card
)) {
2297 chip
= channel
>> 2;
2299 index
= card
->bus_index
;
2300 base_addr
= card
->base_addr
+ (cy_chip_offset
[chip
] << index
);
2301 while (readb(base_addr
+ (CySRER
<< index
)) & CyTxRdy
) {
2302 #ifdef CY_DEBUG_WAIT_UNTIL_SENT
2303 printk(KERN_DEBUG
"Not clean (jiff=%lu)...", jiffies
);
2305 if (msleep_interruptible(jiffies_to_msecs(char_time
)))
2307 if (timeout
&& time_after(jiffies
, orig_jiffies
+
2312 /* Run one more char cycle */
2313 msleep_interruptible(jiffies_to_msecs(char_time
* 5));
2315 #ifdef CY_DEBUG_WAIT_UNTIL_SENT
2316 printk(KERN_DEBUG
"Clean (jiff=%lu)...done\n", jiffies
);
2320 static void cy_flush_buffer(struct tty_struct
*tty
)
2322 struct cyclades_port
*info
= tty
->driver_data
;
2323 struct cyclades_card
*card
;
2324 int channel
, retval
;
2325 unsigned long flags
;
2328 printk(KERN_DEBUG
"cyc:cy_flush_buffer ttyC%d\n", info
->line
);
2331 if (serial_paranoia_check(info
, tty
->name
, "cy_flush_buffer"))
2335 channel
= info
->line
- card
->first_line
;
2337 spin_lock_irqsave(&card
->card_lock
, flags
);
2338 info
->xmit_cnt
= info
->xmit_head
= info
->xmit_tail
= 0;
2339 spin_unlock_irqrestore(&card
->card_lock
, flags
);
2341 if (cy_is_Z(card
)) { /* If it is a Z card, flush the on-board
2343 spin_lock_irqsave(&card
->card_lock
, flags
);
2344 retval
= cyz_issue_cmd(card
, channel
, C_CM_FLUSH_TX
, 0L);
2346 printk(KERN_ERR
"cyc: flush_buffer retval on ttyC%d "
2347 "was %x\n", info
->line
, retval
);
2349 spin_unlock_irqrestore(&card
->card_lock
, flags
);
2352 } /* cy_flush_buffer */
2356 * This routine is called when a particular tty device is closed.
2358 static void cy_close(struct tty_struct
*tty
, struct file
*filp
)
2360 struct cyclades_port
*info
= tty
->driver_data
;
2361 struct cyclades_card
*card
;
2362 unsigned long flags
;
2364 #ifdef CY_DEBUG_OTHER
2365 printk(KERN_DEBUG
"cyc:cy_close ttyC%d\n", info
->line
);
2368 if (!info
|| serial_paranoia_check(info
, tty
->name
, "cy_close"))
2373 spin_lock_irqsave(&card
->card_lock
, flags
);
2374 /* If the TTY is being hung up, nothing to do */
2375 if (tty_hung_up_p(filp
)) {
2376 spin_unlock_irqrestore(&card
->card_lock
, flags
);
2379 #ifdef CY_DEBUG_OPEN
2380 printk(KERN_DEBUG
"cyc:cy_close ttyC%d, count = %d\n", info
->line
,
2383 if ((tty
->count
== 1) && (info
->port
.count
!= 1)) {
2385 * Uh, oh. tty->count is 1, which means that the tty
2386 * structure will be freed. Info->count should always
2387 * be one in these conditions. If it's greater than
2388 * one, we've got real problems, since it means the
2389 * serial port won't be shutdown.
2391 printk(KERN_ERR
"cyc:cy_close: bad serial port count; "
2392 "tty->count is 1, info->port.count is %d\n", info
->port
.count
);
2393 info
->port
.count
= 1;
2395 #ifdef CY_DEBUG_COUNT
2396 printk(KERN_DEBUG
"cyc:cy_close at (%d): decrementing count to %d\n",
2397 current
->pid
, info
->port
.count
- 1);
2399 if (--info
->port
.count
< 0) {
2400 #ifdef CY_DEBUG_COUNT
2401 printk(KERN_DEBUG
"cyc:cyc_close setting count to 0\n");
2403 info
->port
.count
= 0;
2405 if (info
->port
.count
) {
2406 spin_unlock_irqrestore(&card
->card_lock
, flags
);
2409 info
->port
.flags
|= ASYNC_CLOSING
;
2412 * Now we wait for the transmit buffer to clear; and we notify
2413 * the line discipline to only process XON/XOFF characters.
2416 spin_unlock_irqrestore(&card
->card_lock
, flags
);
2417 if (info
->port
.closing_wait
!= CY_CLOSING_WAIT_NONE
)
2418 tty_wait_until_sent(tty
, info
->port
.closing_wait
);
2420 spin_lock_irqsave(&card
->card_lock
, flags
);
2422 if (!cy_is_Z(card
)) {
2423 int channel
= info
->line
- card
->first_line
;
2424 int index
= card
->bus_index
;
2425 void __iomem
*base_addr
= card
->base_addr
+
2426 (cy_chip_offset
[channel
>> 2] << index
);
2427 /* Stop accepting input */
2429 cy_writeb(base_addr
+ (CyCAR
<< index
), (u_char
) channel
);
2430 cy_writeb(base_addr
+ (CySRER
<< index
),
2431 readb(base_addr
+ (CySRER
<< index
)) & ~CyRxData
);
2432 if (info
->port
.flags
& ASYNC_INITIALIZED
) {
2433 /* Waiting for on-board buffers to be empty before
2435 spin_unlock_irqrestore(&card
->card_lock
, flags
);
2436 cy_wait_until_sent(tty
, info
->timeout
);
2437 spin_lock_irqsave(&card
->card_lock
, flags
);
2441 /* Waiting for on-board buffers to be empty before closing
2443 struct CH_CTRL __iomem
*ch_ctrl
= info
->u
.cyz
.ch_ctrl
;
2444 int channel
= info
->line
- card
->first_line
;
2447 if (readl(&ch_ctrl
->flow_status
) != C_FS_TXIDLE
) {
2448 retval
= cyz_issue_cmd(card
, channel
, C_CM_IOCTLW
, 0L);
2450 printk(KERN_DEBUG
"cyc:cy_close retval on "
2451 "ttyC%d was %x\n", info
->line
, retval
);
2453 spin_unlock_irqrestore(&card
->card_lock
, flags
);
2454 wait_for_completion_interruptible(&info
->shutdown_wait
);
2455 spin_lock_irqsave(&card
->card_lock
, flags
);
2460 spin_unlock_irqrestore(&card
->card_lock
, flags
);
2461 cy_shutdown(info
, tty
);
2462 cy_flush_buffer(tty
);
2463 tty_ldisc_flush(tty
);
2464 spin_lock_irqsave(&card
->card_lock
, flags
);
2467 tty_port_tty_set(&info
->port
, NULL
);
2468 if (info
->port
.blocked_open
) {
2469 spin_unlock_irqrestore(&card
->card_lock
, flags
);
2470 if (info
->port
.close_delay
) {
2471 msleep_interruptible(jiffies_to_msecs
2472 (info
->port
.close_delay
));
2474 wake_up_interruptible(&info
->port
.open_wait
);
2475 spin_lock_irqsave(&card
->card_lock
, flags
);
2477 info
->port
.flags
&= ~(ASYNC_NORMAL_ACTIVE
| ASYNC_CLOSING
);
2478 wake_up_interruptible(&info
->port
.close_wait
);
2480 #ifdef CY_DEBUG_OTHER
2481 printk(KERN_DEBUG
"cyc:cy_close done\n");
2484 spin_unlock_irqrestore(&card
->card_lock
, flags
);
2487 /* This routine gets called when tty_write has put something into
2488 * the write_queue. The characters may come from user space or
2491 * This routine will return the number of characters actually
2492 * accepted for writing.
2494 * If the port is not already transmitting stuff, start it off by
2495 * enabling interrupts. The interrupt service routine will then
2496 * ensure that the characters are sent.
2497 * If the port is already active, there is no need to kick it.
2500 static int cy_write(struct tty_struct
*tty
, const unsigned char *buf
, int count
)
2502 struct cyclades_port
*info
= tty
->driver_data
;
2503 unsigned long flags
;
2507 printk(KERN_DEBUG
"cyc:cy_write ttyC%d\n", info
->line
);
2510 if (serial_paranoia_check(info
, tty
->name
, "cy_write"))
2513 if (!info
->port
.xmit_buf
)
2516 spin_lock_irqsave(&info
->card
->card_lock
, flags
);
2518 c
= min(count
, (int)(SERIAL_XMIT_SIZE
- info
->xmit_cnt
- 1));
2519 c
= min(c
, (int)(SERIAL_XMIT_SIZE
- info
->xmit_head
));
2524 memcpy(info
->port
.xmit_buf
+ info
->xmit_head
, buf
, c
);
2525 info
->xmit_head
= (info
->xmit_head
+ c
) &
2526 (SERIAL_XMIT_SIZE
- 1);
2527 info
->xmit_cnt
+= c
;
2532 spin_unlock_irqrestore(&info
->card
->card_lock
, flags
);
2534 info
->idle_stats
.xmit_bytes
+= ret
;
2535 info
->idle_stats
.xmit_idle
= jiffies
;
2537 if (info
->xmit_cnt
&& !tty
->stopped
&& !tty
->hw_stopped
)
2544 * This routine is called by the kernel to write a single
2545 * character to the tty device. If the kernel uses this routine,
2546 * it must call the flush_chars() routine (if defined) when it is
2547 * done stuffing characters into the driver. If there is no room
2548 * in the queue, the character is ignored.
2550 static int cy_put_char(struct tty_struct
*tty
, unsigned char ch
)
2552 struct cyclades_port
*info
= tty
->driver_data
;
2553 unsigned long flags
;
2556 printk(KERN_DEBUG
"cyc:cy_put_char ttyC%d\n", info
->line
);
2559 if (serial_paranoia_check(info
, tty
->name
, "cy_put_char"))
2562 if (!info
->port
.xmit_buf
)
2565 spin_lock_irqsave(&info
->card
->card_lock
, flags
);
2566 if (info
->xmit_cnt
>= (int)(SERIAL_XMIT_SIZE
- 1)) {
2567 spin_unlock_irqrestore(&info
->card
->card_lock
, flags
);
2571 info
->port
.xmit_buf
[info
->xmit_head
++] = ch
;
2572 info
->xmit_head
&= SERIAL_XMIT_SIZE
- 1;
2574 info
->idle_stats
.xmit_bytes
++;
2575 info
->idle_stats
.xmit_idle
= jiffies
;
2576 spin_unlock_irqrestore(&info
->card
->card_lock
, flags
);
2581 * This routine is called by the kernel after it has written a
2582 * series of characters to the tty device using put_char().
2584 static void cy_flush_chars(struct tty_struct
*tty
)
2586 struct cyclades_port
*info
= tty
->driver_data
;
2589 printk(KERN_DEBUG
"cyc:cy_flush_chars ttyC%d\n", info
->line
);
2592 if (serial_paranoia_check(info
, tty
->name
, "cy_flush_chars"))
2595 if (info
->xmit_cnt
<= 0 || tty
->stopped
|| tty
->hw_stopped
||
2596 !info
->port
.xmit_buf
)
2600 } /* cy_flush_chars */
2603 * This routine returns the numbers of characters the tty driver
2604 * will accept for queuing to be written. This number is subject
2605 * to change as output buffers get emptied, or if the output flow
2606 * control is activated.
2608 static int cy_write_room(struct tty_struct
*tty
)
2610 struct cyclades_port
*info
= tty
->driver_data
;
2614 printk(KERN_DEBUG
"cyc:cy_write_room ttyC%d\n", info
->line
);
2617 if (serial_paranoia_check(info
, tty
->name
, "cy_write_room"))
2619 ret
= SERIAL_XMIT_SIZE
- info
->xmit_cnt
- 1;
2623 } /* cy_write_room */
2625 static int cy_chars_in_buffer(struct tty_struct
*tty
)
2627 struct cyclades_port
*info
= tty
->driver_data
;
2629 if (serial_paranoia_check(info
, tty
->name
, "cy_chars_in_buffer"))
2632 #ifdef Z_EXT_CHARS_IN_BUFFER
2633 if (!cy_is_Z(info
->card
)) {
2634 #endif /* Z_EXT_CHARS_IN_BUFFER */
2636 printk(KERN_DEBUG
"cyc:cy_chars_in_buffer ttyC%d %d\n",
2637 info
->line
, info
->xmit_cnt
);
2639 return info
->xmit_cnt
;
2640 #ifdef Z_EXT_CHARS_IN_BUFFER
2642 struct BUF_CTRL __iomem
*buf_ctrl
= info
->u
.cyz
.buf_ctrl
;
2644 __u32 tx_put
, tx_get
, tx_bufsize
;
2647 tx_get
= readl(&buf_ctrl
->tx_get
);
2648 tx_put
= readl(&buf_ctrl
->tx_put
);
2649 tx_bufsize
= readl(&buf_ctrl
->tx_bufsize
);
2650 if (tx_put
>= tx_get
)
2651 char_count
= tx_put
- tx_get
;
2653 char_count
= tx_put
- tx_get
+ tx_bufsize
;
2655 printk(KERN_DEBUG
"cyc:cy_chars_in_buffer ttyC%d %d\n",
2656 info
->line
, info
->xmit_cnt
+ char_count
);
2659 return info
->xmit_cnt
+ char_count
;
2661 #endif /* Z_EXT_CHARS_IN_BUFFER */
2662 } /* cy_chars_in_buffer */
2665 * ------------------------------------------------------------
2666 * cy_ioctl() and friends
2667 * ------------------------------------------------------------
2670 static void cyy_baud_calc(struct cyclades_port
*info
, __u32 baud
)
2672 int co
, co_val
, bpr
;
2673 __u32 cy_clock
= ((info
->chip_rev
>= CD1400_REV_J
) ? 60000000 :
2677 info
->tbpr
= info
->tco
= info
->rbpr
= info
->rco
= 0;
2681 /* determine which prescaler to use */
2682 for (co
= 4, co_val
= 2048; co
; co
--, co_val
>>= 2) {
2683 if (cy_clock
/ co_val
/ baud
> 63)
2687 bpr
= (cy_clock
/ co_val
* 2 / baud
+ 1) / 2;
2691 info
->tbpr
= info
->rbpr
= bpr
;
2692 info
->tco
= info
->rco
= co
;
2696 * This routine finds or computes the various line characteristics.
2697 * It used to be called config_setup
2699 static void cy_set_line_char(struct cyclades_port
*info
, struct tty_struct
*tty
)
2701 struct cyclades_card
*card
;
2702 unsigned long flags
;
2703 void __iomem
*base_addr
;
2704 int chip
, channel
, index
;
2705 unsigned cflag
, iflag
;
2706 int baud
, baud_rate
= 0;
2709 if (!tty
->termios
) /* XXX can this happen at all? */
2712 if (info
->line
== -1)
2715 cflag
= tty
->termios
->c_cflag
;
2716 iflag
= tty
->termios
->c_iflag
;
2719 * Set up the tty->alt_speed kludge
2721 if ((info
->port
.flags
& ASYNC_SPD_MASK
) == ASYNC_SPD_HI
)
2722 tty
->alt_speed
= 57600;
2723 if ((info
->port
.flags
& ASYNC_SPD_MASK
) == ASYNC_SPD_VHI
)
2724 tty
->alt_speed
= 115200;
2725 if ((info
->port
.flags
& ASYNC_SPD_MASK
) == ASYNC_SPD_SHI
)
2726 tty
->alt_speed
= 230400;
2727 if ((info
->port
.flags
& ASYNC_SPD_MASK
) == ASYNC_SPD_WARP
)
2728 tty
->alt_speed
= 460800;
2731 channel
= info
->line
- card
->first_line
;
2733 if (!cy_is_Z(card
)) {
2735 index
= card
->bus_index
;
2738 baud
= tty_get_baud_rate(tty
);
2739 if (baud
== 38400 && (info
->port
.flags
& ASYNC_SPD_MASK
) ==
2741 if (info
->custom_divisor
)
2742 baud_rate
= info
->baud
/ info
->custom_divisor
;
2744 baud_rate
= info
->baud
;
2745 } else if (baud
> CD1400_MAX_SPEED
) {
2746 baud
= CD1400_MAX_SPEED
;
2748 /* find the baud index */
2749 for (i
= 0; i
< 20; i
++) {
2750 if (baud
== baud_table
[i
])
2754 i
= 19; /* CD1400_MAX_SPEED */
2756 if (baud
== 38400 && (info
->port
.flags
& ASYNC_SPD_MASK
) ==
2758 cyy_baud_calc(info
, baud_rate
);
2760 if (info
->chip_rev
>= CD1400_REV_J
) {
2761 /* It is a CD1400 rev. J or later */
2762 info
->tbpr
= baud_bpr_60
[i
]; /* Tx BPR */
2763 info
->tco
= baud_co_60
[i
]; /* Tx CO */
2764 info
->rbpr
= baud_bpr_60
[i
]; /* Rx BPR */
2765 info
->rco
= baud_co_60
[i
]; /* Rx CO */
2767 info
->tbpr
= baud_bpr_25
[i
]; /* Tx BPR */
2768 info
->tco
= baud_co_25
[i
]; /* Tx CO */
2769 info
->rbpr
= baud_bpr_25
[i
]; /* Rx BPR */
2770 info
->rco
= baud_co_25
[i
]; /* Rx CO */
2773 if (baud_table
[i
] == 134) {
2774 /* get it right for 134.5 baud */
2775 info
->timeout
= (info
->xmit_fifo_size
* HZ
* 30 / 269) +
2777 } else if (baud
== 38400 && (info
->port
.flags
& ASYNC_SPD_MASK
) ==
2779 info
->timeout
= (info
->xmit_fifo_size
* HZ
* 15 /
2781 } else if (baud_table
[i
]) {
2782 info
->timeout
= (info
->xmit_fifo_size
* HZ
* 15 /
2784 /* this needs to be propagated into the card info */
2788 /* By tradition (is it a standard?) a baud rate of zero
2789 implies the line should be/has been closed. A bit
2790 later in this routine such a test is performed. */
2792 /* byte size and parity */
2795 /* receive threshold */
2796 info
->cor3
= (info
->default_threshold
?
2797 info
->default_threshold
: baud_cor3
[i
]);
2799 switch (cflag
& CSIZE
) {
2801 info
->cor1
= Cy_5_BITS
;
2804 info
->cor1
= Cy_6_BITS
;
2807 info
->cor1
= Cy_7_BITS
;
2810 info
->cor1
= Cy_8_BITS
;
2814 info
->cor1
|= Cy_2_STOP
;
2816 if (cflag
& PARENB
) {
2818 info
->cor1
|= CyPARITY_O
;
2820 info
->cor1
|= CyPARITY_E
;
2822 info
->cor1
|= CyPARITY_NONE
;
2824 /* CTS flow control flag */
2825 if (cflag
& CRTSCTS
) {
2826 info
->port
.flags
|= ASYNC_CTS_FLOW
;
2827 info
->cor2
|= CyCtsAE
;
2829 info
->port
.flags
&= ~ASYNC_CTS_FLOW
;
2830 info
->cor2
&= ~CyCtsAE
;
2833 info
->port
.flags
&= ~ASYNC_CHECK_CD
;
2835 info
->port
.flags
|= ASYNC_CHECK_CD
;
2837 /***********************************************
2838 The hardware option, CyRtsAO, presents RTS when
2839 the chip has characters to send. Since most modems
2840 use RTS as reverse (inbound) flow control, this
2841 option is not used. If inbound flow control is
2842 necessary, DTR can be programmed to provide the
2843 appropriate signals for use with a non-standard
2844 cable. Contact Marcio Saito for details.
2845 ***********************************************/
2847 chip
= channel
>> 2;
2849 base_addr
= card
->base_addr
+ (cy_chip_offset
[chip
] << index
);
2851 spin_lock_irqsave(&card
->card_lock
, flags
);
2852 cy_writeb(base_addr
+ (CyCAR
<< index
), (u_char
) channel
);
2854 /* tx and rx baud rate */
2856 cy_writeb(base_addr
+ (CyTCOR
<< index
), info
->tco
);
2857 cy_writeb(base_addr
+ (CyTBPR
<< index
), info
->tbpr
);
2858 cy_writeb(base_addr
+ (CyRCOR
<< index
), info
->rco
);
2859 cy_writeb(base_addr
+ (CyRBPR
<< index
), info
->rbpr
);
2861 /* set line characteristics according configuration */
2863 cy_writeb(base_addr
+ (CySCHR1
<< index
), START_CHAR(tty
));
2864 cy_writeb(base_addr
+ (CySCHR2
<< index
), STOP_CHAR(tty
));
2865 cy_writeb(base_addr
+ (CyCOR1
<< index
), info
->cor1
);
2866 cy_writeb(base_addr
+ (CyCOR2
<< index
), info
->cor2
);
2867 cy_writeb(base_addr
+ (CyCOR3
<< index
), info
->cor3
);
2868 cy_writeb(base_addr
+ (CyCOR4
<< index
), info
->cor4
);
2869 cy_writeb(base_addr
+ (CyCOR5
<< index
), info
->cor5
);
2871 cyy_issue_cmd(base_addr
, CyCOR_CHANGE
| CyCOR1ch
| CyCOR2ch
|
2874 /* !!! Is this needed? */
2875 cy_writeb(base_addr
+ (CyCAR
<< index
), (u_char
) channel
);
2876 cy_writeb(base_addr
+ (CyRTPR
<< index
),
2877 (info
->default_timeout
? info
->default_timeout
: 0x02));
2878 /* 10ms rx timeout */
2880 if (C_CLOCAL(tty
)) {
2881 /* without modem intr */
2882 cy_writeb(base_addr
+ (CySRER
<< index
),
2883 readb(base_addr
+ (CySRER
<< index
)) | CyMdmCh
);
2884 /* act on 1->0 modem transitions */
2885 if ((cflag
& CRTSCTS
) && info
->rflow
) {
2886 cy_writeb(base_addr
+ (CyMCOR1
<< index
),
2887 (CyCTS
| rflow_thr
[i
]));
2889 cy_writeb(base_addr
+ (CyMCOR1
<< index
),
2892 /* act on 0->1 modem transitions */
2893 cy_writeb(base_addr
+ (CyMCOR2
<< index
), CyCTS
);
2895 /* without modem intr */
2896 cy_writeb(base_addr
+ (CySRER
<< index
),
2898 (CySRER
<< index
)) | CyMdmCh
);
2899 /* act on 1->0 modem transitions */
2900 if ((cflag
& CRTSCTS
) && info
->rflow
) {
2901 cy_writeb(base_addr
+ (CyMCOR1
<< index
),
2902 (CyDSR
| CyCTS
| CyRI
| CyDCD
|
2905 cy_writeb(base_addr
+ (CyMCOR1
<< index
),
2906 CyDSR
| CyCTS
| CyRI
| CyDCD
);
2908 /* act on 0->1 modem transitions */
2909 cy_writeb(base_addr
+ (CyMCOR2
<< index
),
2910 CyDSR
| CyCTS
| CyRI
| CyDCD
);
2913 if (i
== 0) { /* baud rate is zero, turn off line */
2914 if (info
->rtsdtr_inv
) {
2915 cy_writeb(base_addr
+ (CyMSVR1
<< index
),
2918 cy_writeb(base_addr
+ (CyMSVR2
<< index
),
2922 printk(KERN_DEBUG
"cyc:set_line_char dropping DTR\n");
2923 printk(KERN_DEBUG
" status: 0x%x, 0x%x\n",
2924 readb(base_addr
+ (CyMSVR1
<< index
)),
2925 readb(base_addr
+ (CyMSVR2
<< index
)));
2928 if (info
->rtsdtr_inv
) {
2929 cy_writeb(base_addr
+ (CyMSVR1
<< index
),
2932 cy_writeb(base_addr
+ (CyMSVR2
<< index
),
2936 printk(KERN_DEBUG
"cyc:set_line_char raising DTR\n");
2937 printk(KERN_DEBUG
" status: 0x%x, 0x%x\n",
2938 readb(base_addr
+ (CyMSVR1
<< index
)),
2939 readb(base_addr
+ (CyMSVR2
<< index
)));
2943 clear_bit(TTY_IO_ERROR
, &tty
->flags
);
2944 spin_unlock_irqrestore(&card
->card_lock
, flags
);
2947 struct CH_CTRL __iomem
*ch_ctrl
= info
->u
.cyz
.ch_ctrl
;
2951 if (!cyz_is_loaded(card
))
2955 baud
= tty_get_baud_rate(tty
);
2956 if (baud
== 38400 && (info
->port
.flags
& ASYNC_SPD_MASK
) ==
2958 if (info
->custom_divisor
)
2959 baud_rate
= info
->baud
/ info
->custom_divisor
;
2961 baud_rate
= info
->baud
;
2962 } else if (baud
> CYZ_MAX_SPEED
) {
2963 baud
= CYZ_MAX_SPEED
;
2965 cy_writel(&ch_ctrl
->comm_baud
, baud
);
2968 /* get it right for 134.5 baud */
2969 info
->timeout
= (info
->xmit_fifo_size
* HZ
* 30 / 269) +
2971 } else if (baud
== 38400 && (info
->port
.flags
& ASYNC_SPD_MASK
) ==
2973 info
->timeout
= (info
->xmit_fifo_size
* HZ
* 15 /
2976 info
->timeout
= (info
->xmit_fifo_size
* HZ
* 15 /
2978 /* this needs to be propagated into the card info */
2983 /* byte size and parity */
2984 switch (cflag
& CSIZE
) {
2986 cy_writel(&ch_ctrl
->comm_data_l
, C_DL_CS5
);
2989 cy_writel(&ch_ctrl
->comm_data_l
, C_DL_CS6
);
2992 cy_writel(&ch_ctrl
->comm_data_l
, C_DL_CS7
);
2995 cy_writel(&ch_ctrl
->comm_data_l
, C_DL_CS8
);
2998 if (cflag
& CSTOPB
) {
2999 cy_writel(&ch_ctrl
->comm_data_l
,
3000 readl(&ch_ctrl
->comm_data_l
) | C_DL_2STOP
);
3002 cy_writel(&ch_ctrl
->comm_data_l
,
3003 readl(&ch_ctrl
->comm_data_l
) | C_DL_1STOP
);
3005 if (cflag
& PARENB
) {
3007 cy_writel(&ch_ctrl
->comm_parity
, C_PR_ODD
);
3009 cy_writel(&ch_ctrl
->comm_parity
, C_PR_EVEN
);
3011 cy_writel(&ch_ctrl
->comm_parity
, C_PR_NONE
);
3013 /* CTS flow control flag */
3014 if (cflag
& CRTSCTS
) {
3015 cy_writel(&ch_ctrl
->hw_flow
,
3016 readl(&ch_ctrl
->hw_flow
) | C_RS_CTS
| C_RS_RTS
);
3018 cy_writel(&ch_ctrl
->hw_flow
, readl(&ch_ctrl
->hw_flow
) &
3019 ~(C_RS_CTS
| C_RS_RTS
));
3021 /* As the HW flow control is done in firmware, the driver
3022 doesn't need to care about it */
3023 info
->port
.flags
&= ~ASYNC_CTS_FLOW
;
3025 /* XON/XOFF/XANY flow control flags */
3028 sw_flow
|= C_FL_OXX
;
3030 sw_flow
|= C_FL_OIXANY
;
3032 cy_writel(&ch_ctrl
->sw_flow
, sw_flow
);
3034 retval
= cyz_issue_cmd(card
, channel
, C_CM_IOCTL
, 0L);
3036 printk(KERN_ERR
"cyc:set_line_char retval on ttyC%d "
3037 "was %x\n", info
->line
, retval
);
3040 /* CD sensitivity */
3042 info
->port
.flags
&= ~ASYNC_CHECK_CD
;
3044 info
->port
.flags
|= ASYNC_CHECK_CD
;
3046 if (baud
== 0) { /* baud rate is zero, turn off line */
3047 cy_writel(&ch_ctrl
->rs_control
,
3048 readl(&ch_ctrl
->rs_control
) & ~C_RS_DTR
);
3050 printk(KERN_DEBUG
"cyc:set_line_char dropping Z DTR\n");
3053 cy_writel(&ch_ctrl
->rs_control
,
3054 readl(&ch_ctrl
->rs_control
) | C_RS_DTR
);
3056 printk(KERN_DEBUG
"cyc:set_line_char raising Z DTR\n");
3060 retval
= cyz_issue_cmd(card
, channel
, C_CM_IOCTLM
, 0L);
3062 printk(KERN_ERR
"cyc:set_line_char(2) retval on ttyC%d "
3063 "was %x\n", info
->line
, retval
);
3066 clear_bit(TTY_IO_ERROR
, &tty
->flags
);
3068 } /* set_line_char */
3071 get_serial_info(struct cyclades_port
*info
,
3072 struct serial_struct __user
*retinfo
)
3074 struct serial_struct tmp
;
3075 struct cyclades_card
*cinfo
= info
->card
;
3079 memset(&tmp
, 0, sizeof(tmp
));
3080 tmp
.type
= info
->type
;
3081 tmp
.line
= info
->line
;
3082 tmp
.port
= (info
->card
- cy_card
) * 0x100 + info
->line
-
3084 tmp
.irq
= cinfo
->irq
;
3085 tmp
.flags
= info
->port
.flags
;
3086 tmp
.close_delay
= info
->port
.close_delay
;
3087 tmp
.closing_wait
= info
->port
.closing_wait
;
3088 tmp
.baud_base
= info
->baud
;
3089 tmp
.custom_divisor
= info
->custom_divisor
;
3090 tmp
.hub6
= 0; /*!!! */
3091 return copy_to_user(retinfo
, &tmp
, sizeof(*retinfo
)) ? -EFAULT
: 0;
3092 } /* get_serial_info */
3095 cy_set_serial_info(struct cyclades_port
*info
, struct tty_struct
*tty
,
3096 struct serial_struct __user
*new_info
)
3098 struct serial_struct new_serial
;
3099 struct cyclades_port old_info
;
3101 if (copy_from_user(&new_serial
, new_info
, sizeof(new_serial
)))
3105 if (!capable(CAP_SYS_ADMIN
)) {
3106 if (new_serial
.close_delay
!= info
->port
.close_delay
||
3107 new_serial
.baud_base
!= info
->baud
||
3108 (new_serial
.flags
& ASYNC_FLAGS
&
3110 (info
->port
.flags
& ASYNC_FLAGS
& ~ASYNC_USR_MASK
))
3112 info
->port
.flags
= (info
->port
.flags
& ~ASYNC_USR_MASK
) |
3113 (new_serial
.flags
& ASYNC_USR_MASK
);
3114 info
->baud
= new_serial
.baud_base
;
3115 info
->custom_divisor
= new_serial
.custom_divisor
;
3116 goto check_and_exit
;
3120 * OK, past this point, all the error checking has been done.
3121 * At this point, we start making changes.....
3124 info
->baud
= new_serial
.baud_base
;
3125 info
->custom_divisor
= new_serial
.custom_divisor
;
3126 info
->port
.flags
= (info
->port
.flags
& ~ASYNC_FLAGS
) |
3127 (new_serial
.flags
& ASYNC_FLAGS
);
3128 info
->port
.close_delay
= new_serial
.close_delay
* HZ
/ 100;
3129 info
->port
.closing_wait
= new_serial
.closing_wait
* HZ
/ 100;
3132 if (info
->port
.flags
& ASYNC_INITIALIZED
) {
3133 cy_set_line_char(info
, tty
);
3136 return cy_startup(info
, tty
);
3138 } /* set_serial_info */
3141 * get_lsr_info - get line status register info
3143 * Purpose: Let user call ioctl() to get info when the UART physically
3144 * is emptied. On bus types like RS485, the transmitter must
3145 * release the bus after transmitting. This must be done when
3146 * the transmit shift register is empty, not be done when the
3147 * transmit holding register is empty. This functionality
3148 * allows an RS485 driver to be written in user space.
3150 static int get_lsr_info(struct cyclades_port
*info
, unsigned int __user
*value
)
3152 struct cyclades_card
*card
;
3153 int chip
, channel
, index
;
3154 unsigned char status
;
3155 unsigned int result
;
3156 unsigned long flags
;
3157 void __iomem
*base_addr
;
3160 channel
= (info
->line
) - (card
->first_line
);
3161 if (!cy_is_Z(card
)) {
3162 chip
= channel
>> 2;
3164 index
= card
->bus_index
;
3165 base_addr
= card
->base_addr
+ (cy_chip_offset
[chip
] << index
);
3167 spin_lock_irqsave(&card
->card_lock
, flags
);
3168 status
= readb(base_addr
+ (CySRER
<< index
)) &
3169 (CyTxRdy
| CyTxMpty
);
3170 spin_unlock_irqrestore(&card
->card_lock
, flags
);
3171 result
= (status
? 0 : TIOCSER_TEMT
);
3173 /* Not supported yet */
3176 return put_user(result
, (unsigned long __user
*)value
);
3179 static int cy_tiocmget(struct tty_struct
*tty
, struct file
*file
)
3181 struct cyclades_port
*info
= tty
->driver_data
;
3182 struct cyclades_card
*card
;
3183 int chip
, channel
, index
;
3184 void __iomem
*base_addr
;
3185 unsigned long flags
;
3186 unsigned char status
;
3187 unsigned long lstatus
;
3188 unsigned int result
;
3190 if (serial_paranoia_check(info
, tty
->name
, __func__
))
3196 channel
= info
->line
- card
->first_line
;
3197 if (!cy_is_Z(card
)) {
3198 chip
= channel
>> 2;
3200 index
= card
->bus_index
;
3201 base_addr
= card
->base_addr
+ (cy_chip_offset
[chip
] << index
);
3203 spin_lock_irqsave(&card
->card_lock
, flags
);
3204 cy_writeb(base_addr
+ (CyCAR
<< index
), (u_char
) channel
);
3205 status
= readb(base_addr
+ (CyMSVR1
<< index
));
3206 status
|= readb(base_addr
+ (CyMSVR2
<< index
));
3207 spin_unlock_irqrestore(&card
->card_lock
, flags
);
3209 if (info
->rtsdtr_inv
) {
3210 result
= ((status
& CyRTS
) ? TIOCM_DTR
: 0) |
3211 ((status
& CyDTR
) ? TIOCM_RTS
: 0);
3213 result
= ((status
& CyRTS
) ? TIOCM_RTS
: 0) |
3214 ((status
& CyDTR
) ? TIOCM_DTR
: 0);
3216 result
|= ((status
& CyDCD
) ? TIOCM_CAR
: 0) |
3217 ((status
& CyRI
) ? TIOCM_RNG
: 0) |
3218 ((status
& CyDSR
) ? TIOCM_DSR
: 0) |
3219 ((status
& CyCTS
) ? TIOCM_CTS
: 0);
3221 if (cyz_is_loaded(card
)) {
3222 lstatus
= readl(&info
->u
.cyz
.ch_ctrl
->rs_status
);
3223 result
= ((lstatus
& C_RS_RTS
) ? TIOCM_RTS
: 0) |
3224 ((lstatus
& C_RS_DTR
) ? TIOCM_DTR
: 0) |
3225 ((lstatus
& C_RS_DCD
) ? TIOCM_CAR
: 0) |
3226 ((lstatus
& C_RS_RI
) ? TIOCM_RNG
: 0) |
3227 ((lstatus
& C_RS_DSR
) ? TIOCM_DSR
: 0) |
3228 ((lstatus
& C_RS_CTS
) ? TIOCM_CTS
: 0);
3241 cy_tiocmset(struct tty_struct
*tty
, struct file
*file
,
3242 unsigned int set
, unsigned int clear
)
3244 struct cyclades_port
*info
= tty
->driver_data
;
3245 struct cyclades_card
*card
;
3246 int chip
, channel
, index
;
3247 unsigned long flags
;
3250 if (serial_paranoia_check(info
, tty
->name
, __func__
))
3254 channel
= (info
->line
) - (card
->first_line
);
3255 if (!cy_is_Z(card
)) {
3256 void __iomem
*base_addr
;
3257 chip
= channel
>> 2;
3259 index
= card
->bus_index
;
3260 base_addr
= card
->base_addr
+ (cy_chip_offset
[chip
] << index
);
3262 if (set
& TIOCM_RTS
) {
3263 spin_lock_irqsave(&card
->card_lock
, flags
);
3264 cy_writeb(base_addr
+ (CyCAR
<< index
),
3266 if (info
->rtsdtr_inv
) {
3267 cy_writeb(base_addr
+ (CyMSVR2
<< index
),
3270 cy_writeb(base_addr
+ (CyMSVR1
<< index
),
3273 spin_unlock_irqrestore(&card
->card_lock
, flags
);
3275 if (clear
& TIOCM_RTS
) {
3276 spin_lock_irqsave(&card
->card_lock
, flags
);
3277 cy_writeb(base_addr
+ (CyCAR
<< index
),
3279 if (info
->rtsdtr_inv
) {
3280 cy_writeb(base_addr
+ (CyMSVR2
<< index
),
3283 cy_writeb(base_addr
+ (CyMSVR1
<< index
),
3286 spin_unlock_irqrestore(&card
->card_lock
, flags
);
3288 if (set
& TIOCM_DTR
) {
3289 spin_lock_irqsave(&card
->card_lock
, flags
);
3290 cy_writeb(base_addr
+ (CyCAR
<< index
),
3292 if (info
->rtsdtr_inv
) {
3293 cy_writeb(base_addr
+ (CyMSVR1
<< index
),
3296 cy_writeb(base_addr
+ (CyMSVR2
<< index
),
3300 printk(KERN_DEBUG
"cyc:set_modem_info raising DTR\n");
3301 printk(KERN_DEBUG
" status: 0x%x, 0x%x\n",
3302 readb(base_addr
+ (CyMSVR1
<< index
)),
3303 readb(base_addr
+ (CyMSVR2
<< index
)));
3305 spin_unlock_irqrestore(&card
->card_lock
, flags
);
3307 if (clear
& TIOCM_DTR
) {
3308 spin_lock_irqsave(&card
->card_lock
, flags
);
3309 cy_writeb(base_addr
+ (CyCAR
<< index
),
3311 if (info
->rtsdtr_inv
) {
3312 cy_writeb(base_addr
+ (CyMSVR1
<< index
),
3315 cy_writeb(base_addr
+ (CyMSVR2
<< index
),
3320 printk(KERN_DEBUG
"cyc:set_modem_info dropping DTR\n");
3321 printk(KERN_DEBUG
" status: 0x%x, 0x%x\n",
3322 readb(base_addr
+ (CyMSVR1
<< index
)),
3323 readb(base_addr
+ (CyMSVR2
<< index
)));
3325 spin_unlock_irqrestore(&card
->card_lock
, flags
);
3328 if (cyz_is_loaded(card
)) {
3329 struct CH_CTRL __iomem
*ch_ctrl
= info
->u
.cyz
.ch_ctrl
;
3331 if (set
& TIOCM_RTS
) {
3332 spin_lock_irqsave(&card
->card_lock
, flags
);
3333 cy_writel(&ch_ctrl
->rs_control
,
3334 readl(&ch_ctrl
->rs_control
) | C_RS_RTS
);
3335 spin_unlock_irqrestore(&card
->card_lock
, flags
);
3337 if (clear
& TIOCM_RTS
) {
3338 spin_lock_irqsave(&card
->card_lock
, flags
);
3339 cy_writel(&ch_ctrl
->rs_control
,
3340 readl(&ch_ctrl
->rs_control
) &
3342 spin_unlock_irqrestore(&card
->card_lock
, flags
);
3344 if (set
& TIOCM_DTR
) {
3345 spin_lock_irqsave(&card
->card_lock
, flags
);
3346 cy_writel(&ch_ctrl
->rs_control
,
3347 readl(&ch_ctrl
->rs_control
) | C_RS_DTR
);
3349 printk(KERN_DEBUG
"cyc:set_modem_info raising "
3352 spin_unlock_irqrestore(&card
->card_lock
, flags
);
3354 if (clear
& TIOCM_DTR
) {
3355 spin_lock_irqsave(&card
->card_lock
, flags
);
3356 cy_writel(&ch_ctrl
->rs_control
,
3357 readl(&ch_ctrl
->rs_control
) &
3360 printk(KERN_DEBUG
"cyc:set_modem_info clearing "
3363 spin_unlock_irqrestore(&card
->card_lock
, flags
);
3368 spin_lock_irqsave(&card
->card_lock
, flags
);
3369 retval
= cyz_issue_cmd(card
, channel
, C_CM_IOCTLM
, 0L);
3371 printk(KERN_ERR
"cyc:set_modem_info retval on ttyC%d "
3372 "was %x\n", info
->line
, retval
);
3374 spin_unlock_irqrestore(&card
->card_lock
, flags
);
3380 * cy_break() --- routine which turns the break handling on or off
3382 static int cy_break(struct tty_struct
*tty
, int break_state
)
3384 struct cyclades_port
*info
= tty
->driver_data
;
3385 struct cyclades_card
*card
;
3386 unsigned long flags
;
3389 if (serial_paranoia_check(info
, tty
->name
, "cy_break"))
3394 spin_lock_irqsave(&card
->card_lock
, flags
);
3395 if (!cy_is_Z(card
)) {
3396 /* Let the transmit ISR take care of this (since it
3397 requires stuffing characters into the output stream).
3399 if (break_state
== -1) {
3400 if (!info
->breakon
) {
3402 if (!info
->xmit_cnt
) {
3403 spin_unlock_irqrestore(&card
->card_lock
, flags
);
3405 spin_lock_irqsave(&card
->card_lock
, flags
);
3409 if (!info
->breakoff
) {
3411 if (!info
->xmit_cnt
) {
3412 spin_unlock_irqrestore(&card
->card_lock
, flags
);
3414 spin_lock_irqsave(&card
->card_lock
, flags
);
3419 if (break_state
== -1) {
3420 retval
= cyz_issue_cmd(card
,
3421 info
->line
- card
->first_line
,
3422 C_CM_SET_BREAK
, 0L);
3424 printk(KERN_ERR
"cyc:cy_break (set) retval on "
3425 "ttyC%d was %x\n", info
->line
, retval
);
3428 retval
= cyz_issue_cmd(card
,
3429 info
->line
- card
->first_line
,
3430 C_CM_CLR_BREAK
, 0L);
3432 printk(KERN_DEBUG
"cyc:cy_break (clr) retval "
3433 "on ttyC%d was %x\n", info
->line
,
3438 spin_unlock_irqrestore(&card
->card_lock
, flags
);
3442 static int get_mon_info(struct cyclades_port
*info
,
3443 struct cyclades_monitor __user
*mon
)
3446 if (copy_to_user(mon
, &info
->mon
, sizeof(struct cyclades_monitor
)))
3448 info
->mon
.int_count
= 0;
3449 info
->mon
.char_count
= 0;
3450 info
->mon
.char_max
= 0;
3451 info
->mon
.char_last
= 0;
3453 } /* get_mon_info */
3455 static int set_threshold(struct cyclades_port
*info
, unsigned long value
)
3457 struct cyclades_card
*card
;
3458 void __iomem
*base_addr
;
3459 int channel
, chip
, index
;
3460 unsigned long flags
;
3463 channel
= info
->line
- card
->first_line
;
3464 if (!cy_is_Z(card
)) {
3465 chip
= channel
>> 2;
3467 index
= card
->bus_index
;
3469 card
->base_addr
+ (cy_chip_offset
[chip
] << index
);
3471 info
->cor3
&= ~CyREC_FIFO
;
3472 info
->cor3
|= value
& CyREC_FIFO
;
3474 spin_lock_irqsave(&card
->card_lock
, flags
);
3475 cy_writeb(base_addr
+ (CyCOR3
<< index
), info
->cor3
);
3476 cyy_issue_cmd(base_addr
, CyCOR_CHANGE
| CyCOR3ch
, index
);
3477 spin_unlock_irqrestore(&card
->card_lock
, flags
);
3480 } /* set_threshold */
3482 static int get_threshold(struct cyclades_port
*info
,
3483 unsigned long __user
*value
)
3485 struct cyclades_card
*card
;
3486 void __iomem
*base_addr
;
3487 int channel
, chip
, index
;
3491 channel
= info
->line
- card
->first_line
;
3492 if (!cy_is_Z(card
)) {
3493 chip
= channel
>> 2;
3495 index
= card
->bus_index
;
3496 base_addr
= card
->base_addr
+ (cy_chip_offset
[chip
] << index
);
3498 tmp
= readb(base_addr
+ (CyCOR3
<< index
)) & CyREC_FIFO
;
3499 return put_user(tmp
, value
);
3502 } /* get_threshold */
3504 static int set_default_threshold(struct cyclades_port
*info
,
3505 unsigned long value
)
3507 info
->default_threshold
= value
& 0x0f;
3509 } /* set_default_threshold */
3511 static int get_default_threshold(struct cyclades_port
*info
,
3512 unsigned long __user
*value
)
3514 return put_user(info
->default_threshold
, value
);
3515 } /* get_default_threshold */
3517 static int set_timeout(struct cyclades_port
*info
, unsigned long value
)
3519 struct cyclades_card
*card
;
3520 void __iomem
*base_addr
;
3521 int channel
, chip
, index
;
3522 unsigned long flags
;
3525 channel
= info
->line
- card
->first_line
;
3526 if (!cy_is_Z(card
)) {
3527 chip
= channel
>> 2;
3529 index
= card
->bus_index
;
3530 base_addr
= card
->base_addr
+ (cy_chip_offset
[chip
] << index
);
3532 spin_lock_irqsave(&card
->card_lock
, flags
);
3533 cy_writeb(base_addr
+ (CyRTPR
<< index
), value
& 0xff);
3534 spin_unlock_irqrestore(&card
->card_lock
, flags
);
3539 static int get_timeout(struct cyclades_port
*info
,
3540 unsigned long __user
*value
)
3542 struct cyclades_card
*card
;
3543 void __iomem
*base_addr
;
3544 int channel
, chip
, index
;
3548 channel
= info
->line
- card
->first_line
;
3549 if (!cy_is_Z(card
)) {
3550 chip
= channel
>> 2;
3552 index
= card
->bus_index
;
3553 base_addr
= card
->base_addr
+ (cy_chip_offset
[chip
] << index
);
3555 tmp
= readb(base_addr
+ (CyRTPR
<< index
));
3556 return put_user(tmp
, value
);
3561 static int set_default_timeout(struct cyclades_port
*info
, unsigned long value
)
3563 info
->default_timeout
= value
& 0xff;
3565 } /* set_default_timeout */
3567 static int get_default_timeout(struct cyclades_port
*info
,
3568 unsigned long __user
*value
)
3570 return put_user(info
->default_timeout
, value
);
3571 } /* get_default_timeout */
3574 * This routine allows the tty driver to implement device-
3575 * specific ioctl's. If the ioctl number passed in cmd is
3576 * not recognized by the driver, it should return ENOIOCTLCMD.
3579 cy_ioctl(struct tty_struct
*tty
, struct file
*file
,
3580 unsigned int cmd
, unsigned long arg
)
3582 struct cyclades_port
*info
= tty
->driver_data
;
3583 struct cyclades_icount cprev
, cnow
; /* kernel counter temps */
3584 struct serial_icounter_struct __user
*p_cuser
; /* user space */
3586 unsigned long flags
;
3587 void __user
*argp
= (void __user
*)arg
;
3589 if (serial_paranoia_check(info
, tty
->name
, "cy_ioctl"))
3592 #ifdef CY_DEBUG_OTHER
3593 printk(KERN_DEBUG
"cyc:cy_ioctl ttyC%d, cmd = %x arg = %lx\n",
3594 info
->line
, cmd
, arg
);
3600 ret_val
= get_mon_info(info
, argp
);
3603 ret_val
= get_threshold(info
, argp
);
3606 ret_val
= set_threshold(info
, arg
);
3608 case CYGETDEFTHRESH
:
3609 ret_val
= get_default_threshold(info
, argp
);
3611 case CYSETDEFTHRESH
:
3612 ret_val
= set_default_threshold(info
, arg
);
3615 ret_val
= get_timeout(info
, argp
);
3618 ret_val
= set_timeout(info
, arg
);
3620 case CYGETDEFTIMEOUT
:
3621 ret_val
= get_default_timeout(info
, argp
);
3623 case CYSETDEFTIMEOUT
:
3624 ret_val
= set_default_timeout(info
, arg
);
3627 info
->rflow
= (int)arg
;
3631 ret_val
= info
->rflow
;
3633 case CYSETRTSDTR_INV
:
3634 info
->rtsdtr_inv
= (int)arg
;
3637 case CYGETRTSDTR_INV
:
3638 ret_val
= info
->rtsdtr_inv
;
3640 case CYGETCD1400VER
:
3641 ret_val
= info
->chip_rev
;
3643 #ifndef CONFIG_CYZ_INTR
3644 case CYZSETPOLLCYCLE
:
3645 cyz_polling_cycle
= (arg
* HZ
) / 1000;
3648 case CYZGETPOLLCYCLE
:
3649 ret_val
= (cyz_polling_cycle
* 1000) / HZ
;
3651 #endif /* CONFIG_CYZ_INTR */
3653 info
->port
.closing_wait
= (unsigned short)arg
* HZ
/ 100;
3657 ret_val
= info
->port
.closing_wait
/ (HZ
/ 100);
3660 ret_val
= get_serial_info(info
, argp
);
3663 ret_val
= cy_set_serial_info(info
, tty
, argp
);
3665 case TIOCSERGETLSR
: /* Get line status register */
3666 ret_val
= get_lsr_info(info
, argp
);
3669 * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
3670 * - mask passed in arg for lines of interest
3671 * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
3672 * Caller should use TIOCGICOUNT to see which one it was
3675 spin_lock_irqsave(&info
->card
->card_lock
, flags
);
3676 /* note the counters on entry */
3677 cnow
= info
->icount
;
3678 spin_unlock_irqrestore(&info
->card
->card_lock
, flags
);
3679 ret_val
= wait_event_interruptible(info
->delta_msr_wait
, ({
3681 spin_lock_irqsave(&info
->card
->card_lock
, flags
);
3682 cnow
= info
->icount
; /* atomic copy */
3683 spin_unlock_irqrestore(&info
->card
->card_lock
, flags
);
3685 ((arg
& TIOCM_RNG
) && (cnow
.rng
!= cprev
.rng
)) ||
3686 ((arg
& TIOCM_DSR
) && (cnow
.dsr
!= cprev
.dsr
)) ||
3687 ((arg
& TIOCM_CD
) && (cnow
.dcd
!= cprev
.dcd
)) ||
3688 ((arg
& TIOCM_CTS
) && (cnow
.cts
!= cprev
.cts
));
3693 * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
3694 * Return: write counters to the user passed counter struct
3695 * NB: both 1->0 and 0->1 transitions are counted except for
3696 * RI where only 0->1 is counted.
3699 spin_lock_irqsave(&info
->card
->card_lock
, flags
);
3700 cnow
= info
->icount
;
3701 spin_unlock_irqrestore(&info
->card
->card_lock
, flags
);
3703 ret_val
= put_user(cnow
.cts
, &p_cuser
->cts
);
3706 ret_val
= put_user(cnow
.dsr
, &p_cuser
->dsr
);
3709 ret_val
= put_user(cnow
.rng
, &p_cuser
->rng
);
3712 ret_val
= put_user(cnow
.dcd
, &p_cuser
->dcd
);
3715 ret_val
= put_user(cnow
.rx
, &p_cuser
->rx
);
3718 ret_val
= put_user(cnow
.tx
, &p_cuser
->tx
);
3721 ret_val
= put_user(cnow
.frame
, &p_cuser
->frame
);
3724 ret_val
= put_user(cnow
.overrun
, &p_cuser
->overrun
);
3727 ret_val
= put_user(cnow
.parity
, &p_cuser
->parity
);
3730 ret_val
= put_user(cnow
.brk
, &p_cuser
->brk
);
3733 ret_val
= put_user(cnow
.buf_overrun
, &p_cuser
->buf_overrun
);
3739 ret_val
= -ENOIOCTLCMD
;
3743 #ifdef CY_DEBUG_OTHER
3744 printk(KERN_DEBUG
"cyc:cy_ioctl done\n");
3750 * This routine allows the tty driver to be notified when
3751 * device's termios settings have changed. Note that a
3752 * well-designed tty driver should be prepared to accept the case
3753 * where old == NULL, and try to do something rational.
3755 static void cy_set_termios(struct tty_struct
*tty
, struct ktermios
*old_termios
)
3757 struct cyclades_port
*info
= tty
->driver_data
;
3759 #ifdef CY_DEBUG_OTHER
3760 printk(KERN_DEBUG
"cyc:cy_set_termios ttyC%d\n", info
->line
);
3763 cy_set_line_char(info
, tty
);
3765 if ((old_termios
->c_cflag
& CRTSCTS
) &&
3766 !(tty
->termios
->c_cflag
& CRTSCTS
)) {
3767 tty
->hw_stopped
= 0;
3772 * No need to wake up processes in open wait, since they
3773 * sample the CLOCAL flag once, and don't recheck it.
3774 * XXX It's not clear whether the current behavior is correct
3775 * or not. Hence, this may change.....
3777 if (!(old_termios
->c_cflag
& CLOCAL
) &&
3778 (tty
->termios
->c_cflag
& CLOCAL
))
3779 wake_up_interruptible(&info
->port
.open_wait
);
3781 } /* cy_set_termios */
3783 /* This function is used to send a high-priority XON/XOFF character to
3786 static void cy_send_xchar(struct tty_struct
*tty
, char ch
)
3788 struct cyclades_port
*info
= tty
->driver_data
;
3789 struct cyclades_card
*card
;
3792 if (serial_paranoia_check(info
, tty
->name
, "cy_send_xchar"))
3801 channel
= info
->line
- card
->first_line
;
3803 if (cy_is_Z(card
)) {
3804 if (ch
== STOP_CHAR(tty
))
3805 cyz_issue_cmd(card
, channel
, C_CM_SENDXOFF
, 0L);
3806 else if (ch
== START_CHAR(tty
))
3807 cyz_issue_cmd(card
, channel
, C_CM_SENDXON
, 0L);
3811 /* This routine is called by the upper-layer tty layer to signal
3812 that incoming characters should be throttled because the input
3813 buffers are close to full.
3815 static void cy_throttle(struct tty_struct
*tty
)
3817 struct cyclades_port
*info
= tty
->driver_data
;
3818 struct cyclades_card
*card
;
3819 unsigned long flags
;
3820 void __iomem
*base_addr
;
3821 int chip
, channel
, index
;
3823 #ifdef CY_DEBUG_THROTTLE
3826 printk(KERN_DEBUG
"cyc:throttle %s: %ld...ttyC%d\n", tty_name(tty
, buf
),
3827 tty
->ldisc
.chars_in_buffer(tty
), info
->line
);
3830 if (serial_paranoia_check(info
, tty
->name
, "cy_throttle"))
3837 cy_send_xchar(tty
, STOP_CHAR(tty
));
3842 if (tty
->termios
->c_cflag
& CRTSCTS
) {
3843 channel
= info
->line
- card
->first_line
;
3844 if (!cy_is_Z(card
)) {
3845 chip
= channel
>> 2;
3847 index
= card
->bus_index
;
3848 base_addr
= card
->base_addr
+
3849 (cy_chip_offset
[chip
] << index
);
3851 spin_lock_irqsave(&card
->card_lock
, flags
);
3852 cy_writeb(base_addr
+ (CyCAR
<< index
),
3854 if (info
->rtsdtr_inv
) {
3855 cy_writeb(base_addr
+ (CyMSVR2
<< index
),
3858 cy_writeb(base_addr
+ (CyMSVR1
<< index
),
3861 spin_unlock_irqrestore(&card
->card_lock
, flags
);
3869 * This routine notifies the tty driver that it should signal
3870 * that characters can now be sent to the tty without fear of
3871 * overrunning the input buffers of the line disciplines.
3873 static void cy_unthrottle(struct tty_struct
*tty
)
3875 struct cyclades_port
*info
= tty
->driver_data
;
3876 struct cyclades_card
*card
;
3877 unsigned long flags
;
3878 void __iomem
*base_addr
;
3879 int chip
, channel
, index
;
3881 #ifdef CY_DEBUG_THROTTLE
3884 printk(KERN_DEBUG
"cyc:unthrottle %s: %ld...ttyC%d\n",
3885 tty_name(tty
, buf
), tty_chars_in_buffer(tty
), info
->line
);
3888 if (serial_paranoia_check(info
, tty
->name
, "cy_unthrottle"))
3895 cy_send_xchar(tty
, START_CHAR(tty
));
3898 if (tty
->termios
->c_cflag
& CRTSCTS
) {
3900 channel
= info
->line
- card
->first_line
;
3901 if (!cy_is_Z(card
)) {
3902 chip
= channel
>> 2;
3904 index
= card
->bus_index
;
3905 base_addr
= card
->base_addr
+
3906 (cy_chip_offset
[chip
] << index
);
3908 spin_lock_irqsave(&card
->card_lock
, flags
);
3909 cy_writeb(base_addr
+ (CyCAR
<< index
),
3911 if (info
->rtsdtr_inv
) {
3912 cy_writeb(base_addr
+ (CyMSVR2
<< index
),
3915 cy_writeb(base_addr
+ (CyMSVR1
<< index
),
3918 spin_unlock_irqrestore(&card
->card_lock
, flags
);
3923 } /* cy_unthrottle */
3925 /* cy_start and cy_stop provide software output flow control as a
3926 function of XON/XOFF, software CTS, and other such stuff.
3928 static void cy_stop(struct tty_struct
*tty
)
3930 struct cyclades_card
*cinfo
;
3931 struct cyclades_port
*info
= tty
->driver_data
;
3932 void __iomem
*base_addr
;
3933 int chip
, channel
, index
;
3934 unsigned long flags
;
3936 #ifdef CY_DEBUG_OTHER
3937 printk(KERN_DEBUG
"cyc:cy_stop ttyC%d\n", info
->line
);
3940 if (serial_paranoia_check(info
, tty
->name
, "cy_stop"))
3944 channel
= info
->line
- cinfo
->first_line
;
3945 if (!cy_is_Z(cinfo
)) {
3946 index
= cinfo
->bus_index
;
3947 chip
= channel
>> 2;
3949 base_addr
= cinfo
->base_addr
+ (cy_chip_offset
[chip
] << index
);
3951 spin_lock_irqsave(&cinfo
->card_lock
, flags
);
3952 cy_writeb(base_addr
+ (CyCAR
<< index
),
3953 (u_char
)(channel
& 0x0003)); /* index channel */
3954 cy_writeb(base_addr
+ (CySRER
<< index
),
3955 readb(base_addr
+ (CySRER
<< index
)) & ~CyTxRdy
);
3956 spin_unlock_irqrestore(&cinfo
->card_lock
, flags
);
3960 static void cy_start(struct tty_struct
*tty
)
3962 struct cyclades_card
*cinfo
;
3963 struct cyclades_port
*info
= tty
->driver_data
;
3964 void __iomem
*base_addr
;
3965 int chip
, channel
, index
;
3966 unsigned long flags
;
3968 #ifdef CY_DEBUG_OTHER
3969 printk(KERN_DEBUG
"cyc:cy_start ttyC%d\n", info
->line
);
3972 if (serial_paranoia_check(info
, tty
->name
, "cy_start"))
3976 channel
= info
->line
- cinfo
->first_line
;
3977 index
= cinfo
->bus_index
;
3978 if (!cy_is_Z(cinfo
)) {
3979 chip
= channel
>> 2;
3981 base_addr
= cinfo
->base_addr
+ (cy_chip_offset
[chip
] << index
);
3983 spin_lock_irqsave(&cinfo
->card_lock
, flags
);
3984 cy_writeb(base_addr
+ (CyCAR
<< index
),
3985 (u_char
) (channel
& 0x0003)); /* index channel */
3986 cy_writeb(base_addr
+ (CySRER
<< index
),
3987 readb(base_addr
+ (CySRER
<< index
)) | CyTxRdy
);
3988 spin_unlock_irqrestore(&cinfo
->card_lock
, flags
);
3993 * cy_hangup() --- called by tty_hangup() when a hangup is signaled.
3995 static void cy_hangup(struct tty_struct
*tty
)
3997 struct cyclades_port
*info
= tty
->driver_data
;
3999 #ifdef CY_DEBUG_OTHER
4000 printk(KERN_DEBUG
"cyc:cy_hangup ttyC%d\n", info
->line
);
4003 if (serial_paranoia_check(info
, tty
->name
, "cy_hangup"))
4006 cy_flush_buffer(tty
);
4007 cy_shutdown(info
, tty
);
4008 tty_port_hangup(&info
->port
);
4011 static int cyy_carrier_raised(struct tty_port
*port
)
4013 struct cyclades_port
*info
= container_of(port
, struct cyclades_port
,
4015 struct cyclades_card
*cinfo
= info
->card
;
4016 void __iomem
*base
= cinfo
->base_addr
;
4017 unsigned long flags
;
4018 int channel
= info
->line
- cinfo
->first_line
;
4019 int chip
= channel
>> 2, index
= cinfo
->bus_index
;
4023 base
+= cy_chip_offset
[chip
] << index
;
4025 spin_lock_irqsave(&cinfo
->card_lock
, flags
);
4026 cy_writeb(base
+ (CyCAR
<< index
), (u8
)channel
);
4027 cd
= readb(base
+ (CyMSVR1
<< index
)) & CyDCD
;
4028 spin_unlock_irqrestore(&cinfo
->card_lock
, flags
);
4033 static void cyy_dtr_rts(struct tty_port
*port
, int raise
)
4035 struct cyclades_port
*info
= container_of(port
, struct cyclades_port
,
4037 struct cyclades_card
*cinfo
= info
->card
;
4038 void __iomem
*base
= cinfo
->base_addr
;
4039 unsigned long flags
;
4040 int channel
= info
->line
- cinfo
->first_line
;
4041 int chip
= channel
>> 2, index
= cinfo
->bus_index
;
4044 base
+= cy_chip_offset
[chip
] << index
;
4046 spin_lock_irqsave(&cinfo
->card_lock
, flags
);
4047 cy_writeb(base
+ (CyCAR
<< index
), (u8
)channel
);
4048 cy_writeb(base
+ (CyMSVR1
<< index
), raise
? CyRTS
: ~CyRTS
);
4049 cy_writeb(base
+ (CyMSVR2
<< index
), raise
? CyDTR
: ~CyDTR
);
4051 printk(KERN_DEBUG
"%s: raising DTR\n", __func__
);
4052 printk(KERN_DEBUG
" status: 0x%x, 0x%x\n",
4053 readb(base
+ (CyMSVR1
<< index
)),
4054 readb(base
+ (CyMSVR2
<< index
)));
4056 spin_unlock_irqrestore(&cinfo
->card_lock
, flags
);
4059 static int cyz_carrier_raised(struct tty_port
*port
)
4061 struct cyclades_port
*info
= container_of(port
, struct cyclades_port
,
4064 return readl(&info
->u
.cyz
.ch_ctrl
->rs_status
) & C_RS_DCD
;
4067 static void cyz_dtr_rts(struct tty_port
*port
, int raise
)
4069 struct cyclades_port
*info
= container_of(port
, struct cyclades_port
,
4071 struct cyclades_card
*cinfo
= info
->card
;
4072 struct CH_CTRL __iomem
*ch_ctrl
= info
->u
.cyz
.ch_ctrl
;
4073 int ret
, channel
= info
->line
- cinfo
->first_line
;
4076 rs
= readl(&ch_ctrl
->rs_control
);
4078 rs
|= C_RS_RTS
| C_RS_DTR
;
4080 rs
&= ~(C_RS_RTS
| C_RS_DTR
);
4081 cy_writel(&ch_ctrl
->rs_control
, rs
);
4082 ret
= cyz_issue_cmd(cinfo
, channel
, C_CM_IOCTLM
, 0L);
4084 printk(KERN_ERR
"%s: retval on ttyC%d was %x\n",
4085 __func__
, info
->line
, ret
);
4087 printk(KERN_DEBUG
"%s: raising Z DTR\n", __func__
);
4091 static const struct tty_port_operations cyy_port_ops
= {
4092 .carrier_raised
= cyy_carrier_raised
,
4093 .dtr_rts
= cyy_dtr_rts
,
4096 static const struct tty_port_operations cyz_port_ops
= {
4097 .carrier_raised
= cyz_carrier_raised
,
4098 .dtr_rts
= cyz_dtr_rts
,
4102 * ---------------------------------------------------------------------
4103 * cy_init() and friends
4105 * cy_init() is called at boot-time to initialize the serial driver.
4106 * ---------------------------------------------------------------------
4109 static int __devinit
cy_init_card(struct cyclades_card
*cinfo
)
4111 struct cyclades_port
*info
;
4112 unsigned int channel
, port
;
4114 spin_lock_init(&cinfo
->card_lock
);
4115 cinfo
->intr_enabled
= 0;
4117 cinfo
->ports
= kcalloc(cinfo
->nports
, sizeof(*cinfo
->ports
),
4119 if (cinfo
->ports
== NULL
) {
4120 printk(KERN_ERR
"Cyclades: cannot allocate ports\n");
4124 for (channel
= 0, port
= cinfo
->first_line
; channel
< cinfo
->nports
;
4125 channel
++, port
++) {
4126 info
= &cinfo
->ports
[channel
];
4127 tty_port_init(&info
->port
);
4128 info
->magic
= CYCLADES_MAGIC
;
4132 info
->port
.closing_wait
= CLOSING_WAIT_DELAY
;
4133 info
->port
.close_delay
= 5 * HZ
/ 10;
4134 info
->port
.flags
= STD_COM_FLAGS
;
4135 init_completion(&info
->shutdown_wait
);
4136 init_waitqueue_head(&info
->delta_msr_wait
);
4138 if (cy_is_Z(cinfo
)) {
4139 struct FIRM_ID
*firm_id
= cinfo
->base_addr
+ ID_ADDRESS
;
4140 struct ZFW_CTRL
*zfw_ctrl
;
4142 info
->port
.ops
= &cyz_port_ops
;
4143 info
->type
= PORT_STARTECH
;
4145 zfw_ctrl
= cinfo
->base_addr
+
4146 (readl(&firm_id
->zfwctrl_addr
) & 0xfffff);
4147 info
->u
.cyz
.ch_ctrl
= &zfw_ctrl
->ch_ctrl
[channel
];
4148 info
->u
.cyz
.buf_ctrl
= &zfw_ctrl
->buf_ctrl
[channel
];
4150 if (cinfo
->hw_ver
== ZO_V1
)
4151 info
->xmit_fifo_size
= CYZ_FIFO_SIZE
;
4153 info
->xmit_fifo_size
= 4 * CYZ_FIFO_SIZE
;
4154 #ifdef CONFIG_CYZ_INTR
4155 setup_timer(&cyz_rx_full_timer
[port
],
4156 cyz_rx_restart
, (unsigned long)info
);
4159 unsigned short chip_number
;
4160 int index
= cinfo
->bus_index
;
4162 info
->port
.ops
= &cyy_port_ops
;
4163 info
->type
= PORT_CIRRUS
;
4164 info
->xmit_fifo_size
= CyMAX_CHAR_FIFO
;
4165 info
->cor1
= CyPARITY_NONE
| Cy_1_STOP
| Cy_8_BITS
;
4167 info
->cor3
= 0x08; /* _very_ small rcv threshold */
4169 chip_number
= channel
/ CyPORTS_PER_CHIP
;
4170 info
->chip_rev
= readb(cinfo
->base_addr
+
4171 (cy_chip_offset
[chip_number
] << index
) +
4172 (CyGFRCR
<< index
));
4174 if (info
->chip_rev
>= CD1400_REV_J
) {
4175 /* It is a CD1400 rev. J or later */
4176 info
->tbpr
= baud_bpr_60
[13]; /* Tx BPR */
4177 info
->tco
= baud_co_60
[13]; /* Tx CO */
4178 info
->rbpr
= baud_bpr_60
[13]; /* Rx BPR */
4179 info
->rco
= baud_co_60
[13]; /* Rx CO */
4180 info
->rtsdtr_inv
= 1;
4182 info
->tbpr
= baud_bpr_25
[13]; /* Tx BPR */
4183 info
->tco
= baud_co_25
[13]; /* Tx CO */
4184 info
->rbpr
= baud_bpr_25
[13]; /* Rx BPR */
4185 info
->rco
= baud_co_25
[13]; /* Rx CO */
4186 info
->rtsdtr_inv
= 0;
4188 info
->read_status_mask
= CyTIMEOUT
| CySPECHAR
|
4189 CyBREAK
| CyPARITY
| CyFRAME
| CyOVERRUN
;
4194 #ifndef CONFIG_CYZ_INTR
4195 if (cy_is_Z(cinfo
) && !timer_pending(&cyz_timerlist
)) {
4196 mod_timer(&cyz_timerlist
, jiffies
+ 1);
4198 printk(KERN_DEBUG
"Cyclades-Z polling initialized\n");
4205 /* initialize chips on Cyclom-Y card -- return number of valid
4206 chips (which is number of ports/4) */
4207 static unsigned short __devinit
cyy_init_card(void __iomem
*true_base_addr
,
4210 unsigned int chip_number
;
4211 void __iomem
*base_addr
;
4213 cy_writeb(true_base_addr
+ (Cy_HwReset
<< index
), 0);
4214 /* Cy_HwReset is 0x1400 */
4215 cy_writeb(true_base_addr
+ (Cy_ClrIntr
<< index
), 0);
4216 /* Cy_ClrIntr is 0x1800 */
4219 for (chip_number
= 0; chip_number
< CyMAX_CHIPS_PER_CARD
;
4222 true_base_addr
+ (cy_chip_offset
[chip_number
] << index
);
4224 if (readb(base_addr
+ (CyCCR
<< index
)) != 0x00) {
4226 printk(" chip #%d at %#6lx is never idle (CCR != 0)\n",
4227 chip_number, (unsigned long)base_addr);
4232 cy_writeb(base_addr
+ (CyGFRCR
<< index
), 0);
4235 /* The Cyclom-16Y does not decode address bit 9 and therefore
4236 cannot distinguish between references to chip 0 and a non-
4237 existent chip 4. If the preceding clearing of the supposed
4238 chip 4 GFRCR register appears at chip 0, there is no chip 4
4239 and this must be a Cyclom-16Y, not a Cyclom-32Ye.
4241 if (chip_number
== 4 && readb(true_base_addr
+
4242 (cy_chip_offset
[0] << index
) +
4243 (CyGFRCR
<< index
)) == 0) {
4247 cy_writeb(base_addr
+ (CyCCR
<< index
), CyCHIP_RESET
);
4250 if (readb(base_addr
+ (CyGFRCR
<< index
)) == 0x00) {
4252 printk(" chip #%d at %#6lx is not responding ",
4253 chip_number, (unsigned long)base_addr);
4254 printk("(GFRCR stayed 0)\n",
4258 if ((0xf0 & (readb(base_addr
+ (CyGFRCR
<< index
)))) !=
4261 printk(" chip #%d at %#6lx is not valid (GFRCR == "
4263 chip_number, (unsigned long)base_addr,
4264 base_addr[CyGFRCR<<index]);
4268 cy_writeb(base_addr
+ (CyGCR
<< index
), CyCH0_SERIAL
);
4269 if (readb(base_addr
+ (CyGFRCR
<< index
)) >= CD1400_REV_J
) {
4270 /* It is a CD1400 rev. J or later */
4271 /* Impossible to reach 5ms with this chip.
4272 Changed to 2ms instead (f = 500 Hz). */
4273 cy_writeb(base_addr
+ (CyPPR
<< index
), CyCLOCK_60_2MS
);
4276 cy_writeb(base_addr
+ (CyPPR
<< index
), CyCLOCK_25_5MS
);
4280 printk(" chip #%d at %#6lx is rev 0x%2x\n",
4281 chip_number, (unsigned long)base_addr,
4282 readb(base_addr+(CyGFRCR<<index)));
4286 } /* cyy_init_card */
4289 * ---------------------------------------------------------------------
4290 * cy_detect_isa() - Probe for Cyclom-Y/ISA boards.
4291 * sets global variables and return the number of ISA boards found.
4292 * ---------------------------------------------------------------------
4294 static int __init
cy_detect_isa(void)
4297 unsigned short cy_isa_irq
, nboard
;
4298 void __iomem
*cy_isa_address
;
4299 unsigned short i
, j
, cy_isa_nchan
;
4307 /* Check for module parameters */
4308 for (i
= 0; i
< NR_CARDS
; i
++) {
4309 if (maddr
[i
] || i
) {
4311 cy_isa_addresses
[i
] = maddr
[i
];
4318 /* scan the address table probing for Cyclom-Y/ISA boards */
4319 for (i
= 0; i
< NR_ISA_ADDRS
; i
++) {
4320 unsigned int isa_address
= cy_isa_addresses
[i
];
4321 if (isa_address
== 0x0000)
4324 /* probe for CD1400... */
4325 cy_isa_address
= ioremap_nocache(isa_address
, CyISA_Ywin
);
4326 if (cy_isa_address
== NULL
) {
4327 printk(KERN_ERR
"Cyclom-Y/ISA: can't remap base "
4331 cy_isa_nchan
= CyPORTS_PER_CHIP
*
4332 cyy_init_card(cy_isa_address
, 0);
4333 if (cy_isa_nchan
== 0) {
4334 iounmap(cy_isa_address
);
4338 if (isparam
&& irq
[i
])
4339 cy_isa_irq
= irq
[i
];
4342 /* find out the board's irq by probing */
4343 cy_isa_irq
= detect_isa_irq(cy_isa_address
);
4344 if (cy_isa_irq
== 0) {
4345 printk(KERN_ERR
"Cyclom-Y/ISA found at 0x%lx, but the "
4346 "IRQ could not be detected.\n",
4347 (unsigned long)cy_isa_address
);
4348 iounmap(cy_isa_address
);
4352 if ((cy_next_channel
+ cy_isa_nchan
) > NR_PORTS
) {
4353 printk(KERN_ERR
"Cyclom-Y/ISA found at 0x%lx, but no "
4354 "more channels are available. Change NR_PORTS "
4355 "in cyclades.c and recompile kernel.\n",
4356 (unsigned long)cy_isa_address
);
4357 iounmap(cy_isa_address
);
4360 /* fill the next cy_card structure available */
4361 for (j
= 0; j
< NR_CARDS
; j
++) {
4362 if (cy_card
[j
].base_addr
== NULL
)
4365 if (j
== NR_CARDS
) { /* no more cy_cards available */
4366 printk(KERN_ERR
"Cyclom-Y/ISA found at 0x%lx, but no "
4367 "more cards can be used. Change NR_CARDS in "
4368 "cyclades.c and recompile kernel.\n",
4369 (unsigned long)cy_isa_address
);
4370 iounmap(cy_isa_address
);
4375 if (request_irq(cy_isa_irq
, cyy_interrupt
,
4376 IRQF_DISABLED
, "Cyclom-Y", &cy_card
[j
])) {
4377 printk(KERN_ERR
"Cyclom-Y/ISA found at 0x%lx, but "
4378 "could not allocate IRQ#%d.\n",
4379 (unsigned long)cy_isa_address
, cy_isa_irq
);
4380 iounmap(cy_isa_address
);
4385 cy_card
[j
].base_addr
= cy_isa_address
;
4386 cy_card
[j
].ctl_addr
.p9050
= NULL
;
4387 cy_card
[j
].irq
= (int)cy_isa_irq
;
4388 cy_card
[j
].bus_index
= 0;
4389 cy_card
[j
].first_line
= cy_next_channel
;
4390 cy_card
[j
].num_chips
= cy_isa_nchan
/ CyPORTS_PER_CHIP
;
4391 cy_card
[j
].nports
= cy_isa_nchan
;
4392 if (cy_init_card(&cy_card
[j
])) {
4393 cy_card
[j
].base_addr
= NULL
;
4394 free_irq(cy_isa_irq
, &cy_card
[j
]);
4395 iounmap(cy_isa_address
);
4400 printk(KERN_INFO
"Cyclom-Y/ISA #%d: 0x%lx-0x%lx, IRQ%d found: "
4401 "%d channels starting from port %d\n",
4402 j
+ 1, (unsigned long)cy_isa_address
,
4403 (unsigned long)(cy_isa_address
+ (CyISA_Ywin
- 1)),
4404 cy_isa_irq
, cy_isa_nchan
, cy_next_channel
);
4406 for (j
= cy_next_channel
;
4407 j
< cy_next_channel
+ cy_isa_nchan
; j
++)
4408 tty_register_device(cy_serial_driver
, j
, NULL
);
4409 cy_next_channel
+= cy_isa_nchan
;
4414 #endif /* CONFIG_ISA */
4415 } /* cy_detect_isa */
4418 static inline int __devinit
cyc_isfwstr(const char *str
, unsigned int size
)
4422 for (a
= 0; a
< size
&& *str
; a
++, str
++)
4426 for (; a
< size
; a
++, str
++)
4433 static inline void __devinit
cyz_fpga_copy(void __iomem
*fpga
, const u8
*data
,
4436 for (; size
> 0; size
--) {
4437 cy_writel(fpga
, *data
++);
4442 static void __devinit
plx_init(struct pci_dev
*pdev
, int irq
,
4443 struct RUNTIME_9060 __iomem
*addr
)
4446 cy_writel(&addr
->init_ctrl
, readl(&addr
->init_ctrl
) | 0x40000000);
4448 cy_writel(&addr
->init_ctrl
, readl(&addr
->init_ctrl
) & ~0x40000000);
4450 /* Reload Config. Registers from EEPROM */
4451 cy_writel(&addr
->init_ctrl
, readl(&addr
->init_ctrl
) | 0x20000000);
4453 cy_writel(&addr
->init_ctrl
, readl(&addr
->init_ctrl
) & ~0x20000000);
4455 /* For some yet unknown reason, once the PLX9060 reloads the EEPROM,
4456 * the IRQ is lost and, thus, we have to re-write it to the PCI config.
4457 * registers. This will remain here until we find a permanent fix.
4459 pci_write_config_byte(pdev
, PCI_INTERRUPT_LINE
, irq
);
4462 static int __devinit
__cyz_load_fw(const struct firmware
*fw
,
4463 const char *name
, const u32 mailbox
, void __iomem
*base
,
4466 const void *ptr
= fw
->data
;
4467 const struct zfile_header
*h
= ptr
;
4468 const struct zfile_config
*c
, *cs
;
4469 const struct zfile_block
*b
, *bs
;
4470 unsigned int a
, tmp
, len
= fw
->size
;
4471 #define BAD_FW KERN_ERR "Bad firmware: "
4472 if (len
< sizeof(*h
)) {
4473 printk(BAD_FW
"too short: %u<%zu\n", len
, sizeof(*h
));
4477 cs
= ptr
+ h
->config_offset
;
4478 bs
= ptr
+ h
->block_offset
;
4480 if ((void *)(cs
+ h
->n_config
) > ptr
+ len
||
4481 (void *)(bs
+ h
->n_blocks
) > ptr
+ len
) {
4482 printk(BAD_FW
"too short");
4486 if (cyc_isfwstr(h
->name
, sizeof(h
->name
)) ||
4487 cyc_isfwstr(h
->date
, sizeof(h
->date
))) {
4488 printk(BAD_FW
"bad formatted header string\n");
4492 if (strncmp(name
, h
->name
, sizeof(h
->name
))) {
4493 printk(BAD_FW
"bad name '%s' (expected '%s')\n", h
->name
, name
);
4498 for (c
= cs
; c
< cs
+ h
->n_config
; c
++) {
4499 for (a
= 0; a
< c
->n_blocks
; a
++)
4500 if (c
->block_list
[a
] > h
->n_blocks
) {
4501 printk(BAD_FW
"bad block ref number in cfgs\n");
4504 if (c
->mailbox
== mailbox
&& c
->function
== 0) /* 0 is normal */
4508 printk(BAD_FW
"nothing appropriate\n");
4512 for (b
= bs
; b
< bs
+ h
->n_blocks
; b
++)
4513 if (b
->file_offset
+ b
->size
> len
) {
4514 printk(BAD_FW
"bad block data offset\n");
4518 /* everything is OK, let's seek'n'load it */
4519 for (c
= cs
; c
< cs
+ h
->n_config
; c
++)
4520 if (c
->mailbox
== mailbox
&& c
->function
== 0)
4523 for (a
= 0; a
< c
->n_blocks
; a
++) {
4524 b
= &bs
[c
->block_list
[a
]];
4525 if (b
->type
== ZBLOCK_FPGA
) {
4527 cyz_fpga_copy(fpga
, ptr
+ b
->file_offset
,
4531 memcpy_toio(base
+ b
->ram_offset
,
4532 ptr
+ b
->file_offset
, b
->size
);
4539 static int __devinit
cyz_load_fw(struct pci_dev
*pdev
, void __iomem
*base_addr
,
4540 struct RUNTIME_9060 __iomem
*ctl_addr
, int irq
)
4542 const struct firmware
*fw
;
4543 struct FIRM_ID __iomem
*fid
= base_addr
+ ID_ADDRESS
;
4544 struct CUSTOM_REG __iomem
*cust
= base_addr
;
4545 struct ZFW_CTRL __iomem
*pt_zfwctrl
;
4547 u32 mailbox
, status
, nchan
;
4551 retval
= request_firmware(&fw
, "cyzfirm.bin", &pdev
->dev
);
4553 dev_err(&pdev
->dev
, "can't get firmware\n");
4557 /* Check whether the firmware is already loaded and running. If
4558 positive, skip this board */
4559 if (__cyz_fpga_loaded(ctl_addr
) && readl(&fid
->signature
) == ZFIRM_ID
) {
4560 u32 cntval
= readl(base_addr
+ 0x190);
4563 if (cntval
!= readl(base_addr
+ 0x190)) {
4564 /* FW counter is working, FW is running */
4565 dev_dbg(&pdev
->dev
, "Cyclades-Z FW already loaded. "
4566 "Skipping board.\n");
4573 cy_writel(&ctl_addr
->intr_ctrl_stat
, readl(&ctl_addr
->intr_ctrl_stat
) &
4576 mailbox
= readl(&ctl_addr
->mail_box_0
);
4578 if (mailbox
== 0 || __cyz_fpga_loaded(ctl_addr
)) {
4579 /* stops CPU and set window to beginning of RAM */
4580 cy_writel(&ctl_addr
->loc_addr_base
, WIN_CREG
);
4581 cy_writel(&cust
->cpu_stop
, 0);
4582 cy_writel(&ctl_addr
->loc_addr_base
, WIN_RAM
);
4586 plx_init(pdev
, irq
, ctl_addr
);
4590 retval
= __cyz_load_fw(fw
, "Cyclom-Z", mailbox
, NULL
,
4594 if (!__cyz_fpga_loaded(ctl_addr
)) {
4595 dev_err(&pdev
->dev
, "fw upload successful, but fw is "
4601 /* stops CPU and set window to beginning of RAM */
4602 cy_writel(&ctl_addr
->loc_addr_base
, WIN_CREG
);
4603 cy_writel(&cust
->cpu_stop
, 0);
4604 cy_writel(&ctl_addr
->loc_addr_base
, WIN_RAM
);
4608 for (tmp
= base_addr
; tmp
< base_addr
+ RAM_SIZE
; tmp
++)
4609 cy_writeb(tmp
, 255);
4611 /* set window to last 512K of RAM */
4612 cy_writel(&ctl_addr
->loc_addr_base
, WIN_RAM
+ RAM_SIZE
);
4613 for (tmp
= base_addr
; tmp
< base_addr
+ RAM_SIZE
; tmp
++)
4614 cy_writeb(tmp
, 255);
4615 /* set window to beginning of RAM */
4616 cy_writel(&ctl_addr
->loc_addr_base
, WIN_RAM
);
4619 retval
= __cyz_load_fw(fw
, "Cyclom-Z", mailbox
, base_addr
, NULL
);
4620 release_firmware(fw
);
4624 /* finish boot and start boards */
4625 cy_writel(&ctl_addr
->loc_addr_base
, WIN_CREG
);
4626 cy_writel(&cust
->cpu_start
, 0);
4627 cy_writel(&ctl_addr
->loc_addr_base
, WIN_RAM
);
4629 while ((status
= readl(&fid
->signature
)) != ZFIRM_ID
&& i
++ < 40)
4631 if (status
!= ZFIRM_ID
) {
4632 if (status
== ZFIRM_HLT
) {
4633 dev_err(&pdev
->dev
, "you need an external power supply "
4634 "for this number of ports. Firmware halted and "
4639 dev_warn(&pdev
->dev
, "fid->signature = 0x%x... Waiting "
4640 "some more time\n", status
);
4641 while ((status
= readl(&fid
->signature
)) != ZFIRM_ID
&&
4644 if (status
!= ZFIRM_ID
) {
4645 dev_err(&pdev
->dev
, "Board not started in 20 seconds! "
4646 "Giving up. (fid->signature = 0x%x)\n",
4648 dev_info(&pdev
->dev
, "*** Warning ***: if you are "
4649 "upgrading the FW, please power cycle the "
4650 "system before loading the new FW to the "
4653 if (__cyz_fpga_loaded(ctl_addr
))
4654 plx_init(pdev
, irq
, ctl_addr
);
4659 dev_dbg(&pdev
->dev
, "Firmware started after %d seconds.\n",
4662 pt_zfwctrl
= base_addr
+ readl(&fid
->zfwctrl_addr
);
4664 dev_dbg(&pdev
->dev
, "fid=> %p, zfwctrl_addr=> %x, npt_zfwctrl=> %p\n",
4665 base_addr
+ ID_ADDRESS
, readl(&fid
->zfwctrl_addr
),
4666 base_addr
+ readl(&fid
->zfwctrl_addr
));
4668 nchan
= readl(&pt_zfwctrl
->board_ctrl
.n_channel
);
4669 dev_info(&pdev
->dev
, "Cyclades-Z FW loaded: version = %x, ports = %u\n",
4670 readl(&pt_zfwctrl
->board_ctrl
.fw_version
), nchan
);
4673 dev_warn(&pdev
->dev
, "no Cyclades-Z ports were found. Please "
4674 "check the connection between the Z host card and the "
4675 "serial expanders.\n");
4677 if (__cyz_fpga_loaded(ctl_addr
))
4678 plx_init(pdev
, irq
, ctl_addr
);
4680 dev_info(&pdev
->dev
, "Null number of ports detected. Board "
4686 cy_writel(&pt_zfwctrl
->board_ctrl
.op_system
, C_OS_LINUX
);
4687 cy_writel(&pt_zfwctrl
->board_ctrl
.dr_version
, DRIVER_VERSION
);
4690 Early firmware failed to start looking for commands.
4691 This enables firmware interrupts for those commands.
4693 cy_writel(&ctl_addr
->intr_ctrl_stat
, readl(&ctl_addr
->intr_ctrl_stat
) |
4695 cy_writel(&ctl_addr
->intr_ctrl_stat
, readl(&ctl_addr
->intr_ctrl_stat
) |
4700 release_firmware(fw
);
4705 static int __devinit
cy_pci_probe(struct pci_dev
*pdev
,
4706 const struct pci_device_id
*ent
)
4708 void __iomem
*addr0
= NULL
, *addr2
= NULL
;
4709 char *card_name
= NULL
;
4710 u32
uninitialized_var(mailbox
);
4711 unsigned int device_id
, nchan
= 0, card_no
, i
;
4712 unsigned char plx_ver
;
4715 retval
= pci_enable_device(pdev
);
4717 dev_err(&pdev
->dev
, "cannot enable device\n");
4721 /* read PCI configuration area */
4723 device_id
= pdev
->device
& ~PCI_DEVICE_ID_MASK
;
4725 #if defined(__alpha__)
4726 if (device_id
== PCI_DEVICE_ID_CYCLOM_Y_Lo
) { /* below 1M? */
4727 dev_err(&pdev
->dev
, "Cyclom-Y/PCI not supported for low "
4728 "addresses on Alpha systems.\n");
4733 if (device_id
== PCI_DEVICE_ID_CYCLOM_Z_Lo
) {
4734 dev_err(&pdev
->dev
, "Cyclades-Z/PCI not supported for low "
4740 if (pci_resource_flags(pdev
, 2) & IORESOURCE_IO
) {
4741 dev_warn(&pdev
->dev
, "PCI I/O bit incorrectly set. Ignoring "
4743 pdev
->resource
[2].flags
&= ~IORESOURCE_IO
;
4746 retval
= pci_request_regions(pdev
, "cyclades");
4748 dev_err(&pdev
->dev
, "failed to reserve resources\n");
4753 if (device_id
== PCI_DEVICE_ID_CYCLOM_Y_Lo
||
4754 device_id
== PCI_DEVICE_ID_CYCLOM_Y_Hi
) {
4755 card_name
= "Cyclom-Y";
4757 addr0
= ioremap_nocache(pci_resource_start(pdev
, 0),
4759 if (addr0
== NULL
) {
4760 dev_err(&pdev
->dev
, "can't remap ctl region\n");
4763 addr2
= ioremap_nocache(pci_resource_start(pdev
, 2),
4765 if (addr2
== NULL
) {
4766 dev_err(&pdev
->dev
, "can't remap base region\n");
4770 nchan
= CyPORTS_PER_CHIP
* cyy_init_card(addr2
, 1);
4772 dev_err(&pdev
->dev
, "Cyclom-Y PCI host card with no "
4773 "Serial-Modules\n");
4776 } else if (device_id
== PCI_DEVICE_ID_CYCLOM_Z_Hi
) {
4777 struct RUNTIME_9060 __iomem
*ctl_addr
;
4779 ctl_addr
= addr0
= ioremap_nocache(pci_resource_start(pdev
, 0),
4781 if (addr0
== NULL
) {
4782 dev_err(&pdev
->dev
, "can't remap ctl region\n");
4786 /* Disable interrupts on the PLX before resetting it */
4787 cy_writew(&ctl_addr
->intr_ctrl_stat
,
4788 readw(&ctl_addr
->intr_ctrl_stat
) & ~0x0900);
4790 plx_init(pdev
, irq
, addr0
);
4792 mailbox
= readl(&ctl_addr
->mail_box_0
);
4794 addr2
= ioremap_nocache(pci_resource_start(pdev
, 2),
4795 mailbox
== ZE_V1
? CyPCI_Ze_win
: CyPCI_Zwin
);
4796 if (addr2
== NULL
) {
4797 dev_err(&pdev
->dev
, "can't remap base region\n");
4801 if (mailbox
== ZE_V1
) {
4802 card_name
= "Cyclades-Ze";
4804 card_name
= "Cyclades-8Zo";
4806 if (mailbox
== ZO_V1
) {
4807 cy_writel(&ctl_addr
->loc_addr_base
, WIN_CREG
);
4808 dev_info(&pdev
->dev
, "Cyclades-8Zo/PCI: FPGA "
4809 "id %lx, ver %lx\n", (ulong
)(0xff &
4810 readl(&((struct CUSTOM_REG
*)addr2
)->
4811 fpga_id
)), (ulong
)(0xff &
4812 readl(&((struct CUSTOM_REG
*)addr2
)->
4814 cy_writel(&ctl_addr
->loc_addr_base
, WIN_RAM
);
4816 dev_info(&pdev
->dev
, "Cyclades-Z/PCI: New "
4817 "Cyclades-Z board. FPGA not loaded\n");
4820 /* The following clears the firmware id word. This
4821 ensures that the driver will not attempt to talk to
4822 the board until it has been properly initialized.
4824 if ((mailbox
== ZO_V1
) || (mailbox
== ZO_V2
))
4825 cy_writel(addr2
+ ID_ADDRESS
, 0L);
4828 retval
= cyz_load_fw(pdev
, addr2
, addr0
, irq
);
4834 if ((cy_next_channel
+ nchan
) > NR_PORTS
) {
4835 dev_err(&pdev
->dev
, "Cyclades-8Zo/PCI found, but no "
4836 "channels are available. Change NR_PORTS in "
4837 "cyclades.c and recompile kernel.\n");
4840 /* fill the next cy_card structure available */
4841 for (card_no
= 0; card_no
< NR_CARDS
; card_no
++) {
4842 if (cy_card
[card_no
].base_addr
== NULL
)
4845 if (card_no
== NR_CARDS
) { /* no more cy_cards available */
4846 dev_err(&pdev
->dev
, "Cyclades-8Zo/PCI found, but no "
4847 "more cards can be used. Change NR_CARDS in "
4848 "cyclades.c and recompile kernel.\n");
4852 if (device_id
== PCI_DEVICE_ID_CYCLOM_Y_Lo
||
4853 device_id
== PCI_DEVICE_ID_CYCLOM_Y_Hi
) {
4855 retval
= request_irq(irq
, cyy_interrupt
,
4856 IRQF_SHARED
, "Cyclom-Y", &cy_card
[card_no
]);
4858 dev_err(&pdev
->dev
, "could not allocate IRQ\n");
4861 cy_card
[card_no
].num_chips
= nchan
/ CyPORTS_PER_CHIP
;
4863 struct FIRM_ID __iomem
*firm_id
= addr2
+ ID_ADDRESS
;
4864 struct ZFW_CTRL __iomem
*zfw_ctrl
;
4866 zfw_ctrl
= addr2
+ (readl(&firm_id
->zfwctrl_addr
) & 0xfffff);
4868 cy_card
[card_no
].hw_ver
= mailbox
;
4869 cy_card
[card_no
].num_chips
= (unsigned int)-1;
4870 cy_card
[card_no
].board_ctrl
= &zfw_ctrl
->board_ctrl
;
4871 #ifdef CONFIG_CYZ_INTR
4872 /* allocate IRQ only if board has an IRQ */
4873 if (irq
!= 0 && irq
!= 255) {
4874 retval
= request_irq(irq
, cyz_interrupt
,
4875 IRQF_SHARED
, "Cyclades-Z",
4878 dev_err(&pdev
->dev
, "could not allocate IRQ\n");
4882 #endif /* CONFIG_CYZ_INTR */
4886 cy_card
[card_no
].base_addr
= addr2
;
4887 cy_card
[card_no
].ctl_addr
.p9050
= addr0
;
4888 cy_card
[card_no
].irq
= irq
;
4889 cy_card
[card_no
].bus_index
= 1;
4890 cy_card
[card_no
].first_line
= cy_next_channel
;
4891 cy_card
[card_no
].nports
= nchan
;
4892 retval
= cy_init_card(&cy_card
[card_no
]);
4896 pci_set_drvdata(pdev
, &cy_card
[card_no
]);
4898 if (device_id
== PCI_DEVICE_ID_CYCLOM_Y_Lo
||
4899 device_id
== PCI_DEVICE_ID_CYCLOM_Y_Hi
) {
4900 /* enable interrupts in the PCI interface */
4901 plx_ver
= readb(addr2
+ CyPLX_VER
) & 0x0f;
4904 cy_writeb(addr0
+ 0x4c, 0x43);
4909 default: /* Old boards, use PLX_9060 */
4911 struct RUNTIME_9060 __iomem
*ctl_addr
= addr0
;
4912 plx_init(pdev
, irq
, ctl_addr
);
4913 cy_writew(&ctl_addr
->intr_ctrl_stat
,
4914 readw(&ctl_addr
->intr_ctrl_stat
) | 0x0900);
4920 dev_info(&pdev
->dev
, "%s/PCI #%d found: %d channels starting from "
4921 "port %d.\n", card_name
, card_no
+ 1, nchan
, cy_next_channel
);
4922 for (i
= cy_next_channel
; i
< cy_next_channel
+ nchan
; i
++)
4923 tty_register_device(cy_serial_driver
, i
, &pdev
->dev
);
4924 cy_next_channel
+= nchan
;
4928 cy_card
[card_no
].base_addr
= NULL
;
4929 free_irq(irq
, &cy_card
[card_no
]);
4935 pci_release_regions(pdev
);
4937 pci_disable_device(pdev
);
4942 static void __devexit
cy_pci_remove(struct pci_dev
*pdev
)
4944 struct cyclades_card
*cinfo
= pci_get_drvdata(pdev
);
4947 /* non-Z with old PLX */
4948 if (!cy_is_Z(cinfo
) && (readb(cinfo
->base_addr
+ CyPLX_VER
) & 0x0f) ==
4950 cy_writeb(cinfo
->ctl_addr
.p9050
+ 0x4c, 0);
4952 #ifndef CONFIG_CYZ_INTR
4953 if (!cy_is_Z(cinfo
))
4955 cy_writew(&cinfo
->ctl_addr
.p9060
->intr_ctrl_stat
,
4956 readw(&cinfo
->ctl_addr
.p9060
->intr_ctrl_stat
) &
4959 iounmap(cinfo
->base_addr
);
4960 if (cinfo
->ctl_addr
.p9050
)
4961 iounmap(cinfo
->ctl_addr
.p9050
);
4963 #ifndef CONFIG_CYZ_INTR
4965 #endif /* CONFIG_CYZ_INTR */
4967 free_irq(cinfo
->irq
, cinfo
);
4968 pci_release_regions(pdev
);
4970 cinfo
->base_addr
= NULL
;
4971 for (i
= cinfo
->first_line
; i
< cinfo
->first_line
+
4973 tty_unregister_device(cy_serial_driver
, i
);
4975 kfree(cinfo
->ports
);
4978 static struct pci_driver cy_pci_driver
= {
4980 .id_table
= cy_pci_dev_id
,
4981 .probe
= cy_pci_probe
,
4982 .remove
= __devexit_p(cy_pci_remove
)
4986 static int cyclades_proc_show(struct seq_file
*m
, void *v
)
4988 struct cyclades_port
*info
;
4990 __u32 cur_jifs
= jiffies
;
4992 seq_puts(m
, "Dev TimeOpen BytesOut IdleOut BytesIn "
4993 "IdleIn Overruns Ldisc\n");
4995 /* Output one line for each known port */
4996 for (i
= 0; i
< NR_CARDS
; i
++)
4997 for (j
= 0; j
< cy_card
[i
].nports
; j
++) {
4998 info
= &cy_card
[i
].ports
[j
];
5000 if (info
->port
.count
) {
5001 /* XXX is the ldisc num worth this? */
5002 struct tty_struct
*tty
;
5003 struct tty_ldisc
*ld
;
5005 tty
= tty_port_tty_get(&info
->port
);
5007 ld
= tty_ldisc_ref(tty
);
5010 tty_ldisc_deref(ld
);
5014 seq_printf(m
, "%3d %8lu %10lu %8lu "
5015 "%10lu %8lu %9lu %6d\n", info
->line
,
5016 (cur_jifs
- info
->idle_stats
.in_use
) /
5017 HZ
, info
->idle_stats
.xmit_bytes
,
5018 (cur_jifs
- info
->idle_stats
.xmit_idle
)/
5019 HZ
, info
->idle_stats
.recv_bytes
,
5020 (cur_jifs
- info
->idle_stats
.recv_idle
)/
5021 HZ
, info
->idle_stats
.overruns
,
5024 seq_printf(m
, "%3d %8lu %10lu %8lu "
5025 "%10lu %8lu %9lu %6ld\n",
5026 info
->line
, 0L, 0L, 0L, 0L, 0L, 0L, 0L);
5031 static int cyclades_proc_open(struct inode
*inode
, struct file
*file
)
5033 return single_open(file
, cyclades_proc_show
, NULL
);
5036 static const struct file_operations cyclades_proc_fops
= {
5037 .owner
= THIS_MODULE
,
5038 .open
= cyclades_proc_open
,
5040 .llseek
= seq_lseek
,
5041 .release
= single_release
,
5044 /* The serial driver boot-time initialization code!
5045 Hardware I/O ports are mapped to character special devices on a
5046 first found, first allocated manner. That is, this code searches
5047 for Cyclom cards in the system. As each is found, it is probed
5048 to discover how many chips (and thus how many ports) are present.
5049 These ports are mapped to the tty ports 32 and upward in monotonic
5050 fashion. If an 8-port card is replaced with a 16-port card, the
5051 port mapping on a following card will shift.
5053 This approach is different from what is used in the other serial
5054 device driver because the Cyclom is more properly a multiplexer,
5055 not just an aggregation of serial ports on one card.
5057 If there are more cards with more ports than have been
5058 statically allocated above, a warning is printed and the
5059 extra ports are ignored.
5062 static const struct tty_operations cy_ops
= {
5066 .put_char
= cy_put_char
,
5067 .flush_chars
= cy_flush_chars
,
5068 .write_room
= cy_write_room
,
5069 .chars_in_buffer
= cy_chars_in_buffer
,
5070 .flush_buffer
= cy_flush_buffer
,
5072 .throttle
= cy_throttle
,
5073 .unthrottle
= cy_unthrottle
,
5074 .set_termios
= cy_set_termios
,
5077 .hangup
= cy_hangup
,
5078 .break_ctl
= cy_break
,
5079 .wait_until_sent
= cy_wait_until_sent
,
5080 .tiocmget
= cy_tiocmget
,
5081 .tiocmset
= cy_tiocmset
,
5082 .proc_fops
= &cyclades_proc_fops
,
5085 static int __init
cy_init(void)
5087 unsigned int nboards
;
5088 int retval
= -ENOMEM
;
5090 cy_serial_driver
= alloc_tty_driver(NR_PORTS
);
5091 if (!cy_serial_driver
)
5094 printk(KERN_INFO
"Cyclades driver " CY_VERSION
" (built %s %s)\n",
5095 __DATE__
, __TIME__
);
5097 /* Initialize the tty_driver structure */
5099 cy_serial_driver
->owner
= THIS_MODULE
;
5100 cy_serial_driver
->driver_name
= "cyclades";
5101 cy_serial_driver
->name
= "ttyC";
5102 cy_serial_driver
->major
= CYCLADES_MAJOR
;
5103 cy_serial_driver
->minor_start
= 0;
5104 cy_serial_driver
->type
= TTY_DRIVER_TYPE_SERIAL
;
5105 cy_serial_driver
->subtype
= SERIAL_TYPE_NORMAL
;
5106 cy_serial_driver
->init_termios
= tty_std_termios
;
5107 cy_serial_driver
->init_termios
.c_cflag
=
5108 B9600
| CS8
| CREAD
| HUPCL
| CLOCAL
;
5109 cy_serial_driver
->flags
= TTY_DRIVER_REAL_RAW
| TTY_DRIVER_DYNAMIC_DEV
;
5110 tty_set_operations(cy_serial_driver
, &cy_ops
);
5112 retval
= tty_register_driver(cy_serial_driver
);
5114 printk(KERN_ERR
"Couldn't register Cyclades serial driver\n");
5118 /* the code below is responsible to find the boards. Each different
5119 type of board has its own detection routine. If a board is found,
5120 the next cy_card structure available is set by the detection
5121 routine. These functions are responsible for checking the
5122 availability of cy_card and cy_port data structures and updating
5123 the cy_next_channel. */
5125 /* look for isa boards */
5126 nboards
= cy_detect_isa();
5129 /* look for pci boards */
5130 retval
= pci_register_driver(&cy_pci_driver
);
5131 if (retval
&& !nboards
) {
5132 tty_unregister_driver(cy_serial_driver
);
5139 put_tty_driver(cy_serial_driver
);
5144 static void __exit
cy_cleanup_module(void)
5146 struct cyclades_card
*card
;
5149 #ifndef CONFIG_CYZ_INTR
5150 del_timer_sync(&cyz_timerlist
);
5151 #endif /* CONFIG_CYZ_INTR */
5153 e1
= tty_unregister_driver(cy_serial_driver
);
5155 printk(KERN_ERR
"failed to unregister Cyclades serial "
5156 "driver(%d)\n", e1
);
5159 pci_unregister_driver(&cy_pci_driver
);
5162 for (i
= 0; i
< NR_CARDS
; i
++) {
5164 if (card
->base_addr
) {
5165 /* clear interrupt */
5166 cy_writeb(card
->base_addr
+ Cy_ClrIntr
, 0);
5167 iounmap(card
->base_addr
);
5168 if (card
->ctl_addr
.p9050
)
5169 iounmap(card
->ctl_addr
.p9050
);
5171 #ifndef CONFIG_CYZ_INTR
5173 #endif /* CONFIG_CYZ_INTR */
5175 free_irq(card
->irq
, card
);
5176 for (e1
= card
->first_line
; e1
< card
->first_line
+
5178 tty_unregister_device(cy_serial_driver
, e1
);
5183 put_tty_driver(cy_serial_driver
);
5184 } /* cy_cleanup_module */
5186 module_init(cy_init
);
5187 module_exit(cy_cleanup_module
);
5189 MODULE_LICENSE("GPL");
5190 MODULE_VERSION(CY_VERSION
);
5191 MODULE_ALIAS_CHARDEV_MAJOR(CYCLADES_MAJOR
);