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pasemi: hardware rng driver
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / char / cyclades.c
CommitLineData
1da177e4
LT		 1#undef BLOCKMOVE
2#define Z_WAKE
3#undef Z_EXT_CHARS_IN_BUFFER
1da177e4
LT		 4
5/*
6 * linux/drivers/char/cyclades.c
7 *
8 * This file contains the driver for the Cyclades async multiport
9 * serial boards.
10 *
11 * Initially written by Randolph Bentson <bentson@grieg.seaslug.org>.
12 * Modified and maintained by Marcio Saito <marcio@cyclades.com>.
1da177e4 13 *
c8e1693a 14 * Copyright (C) 2007 Jiri Slaby <jirislaby@gmail.com>
1da177e4
LT		 15 *
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.
c8e1693a 20 * Converted to pci probing and cleaned up by Jiri Slaby.
1da177e4
LT		 21 *
22 * This version supports shared IRQ's (only for PCI boards).
23 *
24 * $Log: cyclades.c,v $
25 * Prevent users from opening non-existing Z ports.
26 *
27 * Revision 2.3.2.8 2000/07/06 18:14:16 ivan
28 * Fixed the PCI detection function to work properly on Alpha systems.
29 * Implemented support for TIOCSERGETLSR ioctl.
30 * Implemented full support for non-standard baud rates.
31 *
32 * Revision 2.3.2.7 2000/06/01 18:26:34 ivan
33 * Request PLX I/O region, although driver doesn't use it, to avoid
34 * problems with other drivers accessing it.
35 * Removed count for on-board buffer characters in cy_chars_in_buffer
36 * (Cyclades-Z only).
37 *
38 * Revision 2.3.2.6 2000/05/05 13:56:05 ivan
39 * Driver now reports physical instead of virtual memory addresses.
40 * Masks were added to some Cyclades-Z read accesses.
41 * Implemented workaround for PLX9050 bug that would cause a system lockup
42 * in certain systems, depending on the MMIO addresses allocated to the
43 * board.
44 * Changed the Tx interrupt programming in the CD1400 chips to boost up
45 * performance (Cyclom-Y only).
46 * Code is now compliant with the new module interface (module_[init|exit]).
47 * Make use of the PCI helper functions to access PCI resources.
48 * Did some code "housekeeping".
49 *
50 * Revision 2.3.2.5 2000/01/19 14:35:33 ivan
51 * Fixed bug in cy_set_termios on CRTSCTS flag turnoff.
52 *
53 * Revision 2.3.2.4 2000/01/17 09:19:40 ivan
54 * Fixed SMP locking in Cyclom-Y interrupt handler.
55 *
56 * Revision 2.3.2.3 1999/12/28 12:11:39 ivan
57 * Added a new cyclades_card field called nports to allow the driver to
58 * know the exact number of ports found by the Z firmware after its load;
59 * RX buffer contention prevention logic on interrupt op mode revisited
60 * (Cyclades-Z only);
61 * Revisited printk's for Z debug;
62 * Driver now makes sure that the constant SERIAL_XMIT_SIZE is defined;
63 *
64 * Revision 2.3.2.2 1999/10/01 11:27:43 ivan
65 * Fixed bug in cyz_poll that would make all ports but port 0
66 * unable to transmit/receive data (Cyclades-Z only);
67 * Implemented logic to prevent the RX buffer from being stuck with data
68 * due to a driver / firmware race condition in interrupt op mode
69 * (Cyclades-Z only);
70 * Fixed bug in block_til_ready logic that would lead to a system crash;
71 * Revisited cy_close spinlock usage;
72 *
73 * Revision 2.3.2.1 1999/09/28 11:01:22 ivan
74 * Revisited CONFIG_PCI conditional compilation for PCI board support;
75 * Implemented TIOCGICOUNT and TIOCMIWAIT ioctl support;
76 * _Major_ cleanup on the Cyclades-Z interrupt support code / logic;
77 * Removed CTS handling from the driver -- this is now completely handled
78 * by the firmware (Cyclades-Z only);
79 * Flush RX on-board buffers on a port open (Cyclades-Z only);
80 * Fixed handling of ASYNC_SPD_* TTY flags;
81 * Module unload now unmaps all memory area allocated by ioremap;
82 *
83 * Revision 2.3.1.1 1999/07/15 16:45:53 ivan
84 * Removed CY_PROC conditional compilation;
85 * Implemented SMP-awareness for the driver;
86 * Implemented a new ISA IRQ autoprobe that uses the irq_probe_[on|off]
87 * functions;
88 * The driver now accepts memory addresses (maddr=0xMMMMM) and IRQs
89 * (irq=NN) as parameters (only for ISA boards);
90 * Fixed bug in set_line_char that would prevent the Cyclades-Z
91 * ports from being configured at speeds above 115.2Kbps;
92 * Fixed bug in cy_set_termios that would prevent XON/XOFF flow control
93 * switching from working properly;
94 * The driver now only prints IRQ info for the Cyclades-Z if it's
95 * configured to work in interrupt mode;
96 *
97 * Revision 2.2.2.3 1999/06/28 11:13:29 ivan
98 * Added support for interrupt mode operation for the Z cards;
99 * Removed the driver inactivity control for the Z;
100 * Added a missing MOD_DEC_USE_COUNT in the cy_open function for when
101 * the Z firmware is not loaded yet;
102 * Replaced the "manual" Z Tx flush buffer by a call to a FW command of
103 * same functionality;
104 * Implemented workaround for IRQ setting loss on the PCI configuration
105 * registers after a PCI bridge EEPROM reload (affects PLX9060 only);
106 *
107 * Revision 2.2.2.2 1999/05/14 17:18:15 ivan
108 * /proc entry location changed to /proc/tty/driver/cyclades;
109 * Added support to shared IRQ's (only for PCI boards);
110 * Added support for Cobalt Qube2 systems;
111 * IRQ [de]allocation scheme revisited;
112 * BREAK implementation changed in order to make use of the 'break_ctl'
113 * TTY facility;
114 * Fixed typo in TTY structure field 'driver_name';
115 * Included a PCI bridge reset and EEPROM reload in the board
116 * initialization code (for both Y and Z series).
117 *
118 * Revision 2.2.2.1 1999/04/08 16:17:43 ivan
119 * Fixed a bug in cy_wait_until_sent that was preventing the port to be
120 * closed properly after a SIGINT;
121 * Module usage counter scheme revisited;
122 * Added support to the upcoming Y PCI boards (i.e., support to additional
123 * PCI Device ID's).
124 *
125 * Revision 2.2.1.10 1999/01/20 16:14:29 ivan
126 * Removed all unnecessary page-alignement operations in ioremap calls
127 * (ioremap is currently safe for these operations).
128 *
129 * Revision 2.2.1.9 1998/12/30 18:18:30 ivan
130 * Changed access to PLX PCI bridge registers from I/O to MMIO, in
131 * order to make PLX9050-based boards work with certain motherboards.
132 *
133 * Revision 2.2.1.8 1998/11/13 12:46:20 ivan
134 * cy_close function now resets (correctly) the tty->closing flag;
135 * JIFFIES_DIFF macro fixed.
136 *
137 * Revision 2.2.1.7 1998/09/03 12:07:28 ivan
138 * Fixed bug in cy_close function, which was not informing HW of
139 * which port should have the reception disabled before doing so;
140 * fixed Cyclom-8YoP hardware detection bug.
141 *
142 * Revision 2.2.1.6 1998/08/20 17:15:39 ivan
143 * Fixed bug in cy_close function, which causes malfunction
144 * of one of the first 4 ports when a higher port is closed
145 * (Cyclom-Y only).
146 *
147 * Revision 2.2.1.5 1998/08/10 18:10:28 ivan
148 * Fixed Cyclom-4Yo hardware detection bug.
149 *
150 * Revision 2.2.1.4 1998/08/04 11:02:50 ivan
151 * /proc/cyclades implementation with great collaboration of
152 * Marc Lewis <marc@blarg.net>;
153 * cyy_interrupt was changed to avoid occurrence of kernel oopses
154 * during PPP operation.
155 *
156 * Revision 2.2.1.3 1998/06/01 12:09:10 ivan
157 * General code review in order to comply with 2.1 kernel standards;
158 * data loss prevention for slow devices revisited (cy_wait_until_sent
159 * was created);
160 * removed conditional compilation for new/old PCI structure support
161 * (now the driver only supports the new PCI structure).
162 *
163 * Revision 2.2.1.1 1998/03/19 16:43:12 ivan
164 * added conditional compilation for new/old PCI structure support;
165 * removed kernel series (2.0.x / 2.1.x) conditional compilation.
166 *
167 * Revision 2.1.1.3 1998/03/16 18:01:12 ivan
168 * cleaned up the data loss fix;
169 * fixed XON/XOFF handling once more (Cyclades-Z);
170 * general review of the driver routines;
171 * introduction of a mechanism to prevent data loss with slow
172 * printers, by forcing a delay before closing the port.
173 *
174 * Revision 2.1.1.2 1998/02/17 16:50:00 ivan
175 * fixed detection/handling of new CD1400 in Ye boards;
176 * fixed XON/XOFF handling (Cyclades-Z);
177 * fixed data loss caused by a premature port close;
178 * introduction of a flag that holds the CD1400 version ID per port
179 * (used by the CYGETCD1400VER new ioctl).
180 *
181 * Revision 2.1.1.1 1997/12/03 17:31:19 ivan
182 * Code review for the module cleanup routine;
183 * fixed RTS and DTR status report for new CD1400's in get_modem_info;
184 * includes anonymous changes regarding signal_pending.
185 *
186 * Revision 2.1 1997/11/01 17:42:41 ivan
187 * Changes in the driver to support Alpha systems (except 8Zo V_1);
188 * BREAK fix for the Cyclades-Z boards;
189 * driver inactivity control by FW implemented;
190 * introduction of flag that allows driver to take advantage of
191 * a special CD1400 feature related to HW flow control;
192 * added support for the CD1400 rev. J (Cyclom-Y boards);
193 * introduction of ioctls to:
194 * - control the rtsdtr_inv flag (Cyclom-Y);
195 * - control the rflow flag (Cyclom-Y);
196 * - adjust the polling interval (Cyclades-Z);
197 *
198 * Revision 1.36.4.33 1997/06/27 19:00:00 ivan
199 * Fixes related to kernel version conditional
200 * compilation.
201 *
202 * Revision 1.36.4.32 1997/06/14 19:30:00 ivan
203 * Compatibility issues between kernels 2.0.x and
204 * 2.1.x (mainly related to clear_bit function).
205 *
206 * Revision 1.36.4.31 1997/06/03 15:30:00 ivan
207 * Changes to define the memory window according to the
208 * board type.
209 *
210 * Revision 1.36.4.30 1997/05/16 15:30:00 daniel
211 * Changes to support new cycladesZ boards.
212 *
213 * Revision 1.36.4.29 1997/05/12 11:30:00 daniel
214 * Merge of Bentson's and Daniel's version 1.36.4.28.
215 * Corrects bug in cy_detect_pci: check if there are more
216 * ports than the number of static structs allocated.
217 * Warning message during initialization if this driver is
218 * used with the new generation of cycladesZ boards. Those
219 * will be supported only in next release of the driver.
220 * Corrects bug in cy_detect_pci and cy_detect_isa that
221 * returned wrong number of VALID boards, when a cyclomY
222 * was found with no serial modules connected.
223 * Changes to use current (2.1.x) kernel subroutine names
224 * and created macros for compilation with 2.0.x kernel,
225 * instead of the other way around.
226 *
227 * Revision 1.36.4.28 1997/05/?? ??:00:00 bentson
228 * Change queue_task_irq_off to queue_task_irq.
229 * The inline function queue_task_irq_off (tqueue.h)
230 * was removed from latest releases of 2.1.x kernel.
231 * Use of macro __init to mark the initialization
232 * routines, so memory can be reused.
233 * Also incorporate implementation of critical region
234 * in function cleanup_module() created by anonymous
235 * linuxer.
236 *
237 * Revision 1.36.4.28 1997/04/25 16:00:00 daniel
238 * Change to support new firmware that solves DCD problem:
239 * application could fail to receive SIGHUP signal when DCD
240 * varying too fast.
241 *
242 * Revision 1.36.4.27 1997/03/26 10:30:00 daniel
243 * Changed for support linux versions 2.1.X.
244 * Backward compatible with linux versions 2.0.X.
245 * Corrected illegal use of filler field in
246 * CH_CTRL struct.
247 * Deleted some debug messages.
248 *
249 * Revision 1.36.4.26 1997/02/27 12:00:00 daniel
250 * Included check for NULL tty pointer in cyz_poll.
251 *
252 * Revision 1.36.4.25 1997/02/26 16:28:30 bentson
253 * Bill Foster at Blarg! Online services noticed that
254 * some of the switch elements of -Z modem control
255 * lacked a closing "break;"
256 *
257 * Revision 1.36.4.24 1997/02/24 11:00:00 daniel
258 * Changed low water threshold for buffer xmit_buf
259 *
260 * Revision 1.36.4.23 1996/12/02 21:50:16 bentson
261 * Marcio provided fix to modem status fetch for -Z
262 *
263 * Revision 1.36.4.22 1996/10/28 22:41:17 bentson
264 * improve mapping of -Z control page (thanks to Steve
265 * Price <stevep@fa.tdktca.com> for help on this)
266 *
267 * Revision 1.36.4.21 1996/09/10 17:00:10 bentson
268 * shift from CPU-bound to memcopy in cyz_polling operation
269 *
270 * Revision 1.36.4.20 1996/09/09 18:30:32 Bentson
271 * Added support to set and report higher speeds.
272 *
273 * Revision 1.36.4.19c 1996/08/09 10:00:00 Marcio Saito
274 * Some fixes in the HW flow control for the BETA release.
275 * Don't try to register the IRQ.
276 *
277 * Revision 1.36.4.19 1996/08/08 16:23:18 Bentson
278 * make sure "cyc" appears in all kernel messages; all soft interrupts
279 * handled by same routine; recognize out-of-band reception; comment
280 * out some diagnostic messages; leave RTS/CTS flow control to hardware;
33430dc5 281 * fix race condition in -Z buffer management; only -Y needs to explicitly
1da177e4
LT		 282 * flush chars; tidy up some startup messages;
283 *
284 * Revision 1.36.4.18 1996/07/25 18:57:31 bentson
285 * shift MOD_INC_USE_COUNT location to match
286 * serial.c; purge some diagnostic messages;
287 *
288 * Revision 1.36.4.17 1996/07/25 18:01:08 bentson
289 * enable modem status messages and fetch & process them; note
290 * time of last activity type for each port; set_line_char now
291 * supports more than line 0 and treats 0 baud correctly;
292 * get_modem_info senses rs_status;
293 *
294 * Revision 1.36.4.16 1996/07/20 08:43:15 bentson
295 * barely works--now's time to turn on
296 * more features 'til it breaks
297 *
298 * Revision 1.36.4.15 1996/07/19 22:30:06 bentson
299 * check more -Z board status; shorten boot message
300 *
301 * Revision 1.36.4.14 1996/07/19 22:20:37 bentson
302 * fix reference to ch_ctrl in startup; verify return
303 * values from cyz_issue_cmd and cyz_update_channel;
304 * more stuff to get modem control correct;
305 *
306 * Revision 1.36.4.13 1996/07/11 19:53:33 bentson
307 * more -Z stuff folded in; re-order changes to put -Z stuff
308 * after -Y stuff (to make changes clearer)
309 *
310 * Revision 1.36.4.12 1996/07/11 15:40:55 bentson
311 * Add code to poll Cyclades-Z. Add code to get & set RS-232 control.
312 * Add code to send break. Clear firmware ID word at startup (so
313 * that other code won't talk to inactive board).
314 *
315 * Revision 1.36.4.11 1996/07/09 05:28:29 bentson
316 * add code for -Z in set_line_char
317 *
318 * Revision 1.36.4.10 1996/07/08 19:28:37 bentson
319 * fold more -Z stuff (or in some cases, error messages)
320 * into driver; add text to "don't know what to do" messages.
321 *
322 * Revision 1.36.4.9 1996/07/08 18:38:38 bentson
323 * moved compile-time flags near top of file; cosmetic changes
324 * to narrow text (to allow 2-up printing); changed many declarations
325 * to "static" to limit external symbols; shuffled code order to
326 * coalesce -Y and -Z specific code, also to put internal functions
327 * in order of tty_driver structure; added code to recognize -Z
328 * ports (and for moment, do nothing or report error); add cy_startup
329 * to parse boot command line for extra base addresses for ISA probes;
330 *
331 * Revision 1.36.4.8 1996/06/25 17:40:19 bentson
332 * reorder some code, fix types of some vars (int vs. long),
333 * add cy_setup to support user declared ISA addresses
334 *
335 * Revision 1.36.4.7 1996/06/21 23:06:18 bentson
336 * dump ioctl based firmware load (it's now a user level
337 * program); ensure uninitialzed ports cannot be used
338 *
339 * Revision 1.36.4.6 1996/06/20 23:17:19 bentson
340 * rename vars and restructure some code
341 *
342 * Revision 1.36.4.5 1996/06/14 15:09:44 bentson
343 * get right status back after boot load
344 *
345 * Revision 1.36.4.4 1996/06/13 19:51:44 bentson
346 * successfully loads firmware
347 *
348 * Revision 1.36.4.3 1996/06/13 06:08:33 bentson
349 * add more of the code for the boot/load ioctls
350 *
351 * Revision 1.36.4.2 1996/06/11 21:00:51 bentson
352 * start to add Z functionality--starting with ioctl
353 * for loading firmware
354 *
355 * Revision 1.36.4.1 1996/06/10 18:03:02 bentson
356 * added code to recognize Z/PCI card at initialization; report
357 * presence, but card is not initialized (because firmware needs
358 * to be loaded)
359 *
360 * Revision 1.36.3.8 1996/06/07 16:29:00 bentson
361 * starting minor number at zero; added missing verify_area
362 * as noted by Heiko Eissfeldt <heiko@colossus.escape.de>
363 *
364 * Revision 1.36.3.7 1996/04/19 21:06:18 bentson
365 * remove unneeded boot message & fix CLOCAL hardware flow
366 * control (Miquel van Smoorenburg <miquels@Q.cistron.nl>);
367 * remove unused diagnostic statements; minor 0 is first;
368 *
369 * Revision 1.36.3.6 1996/03/13 13:21:17 marcio
370 * The kernel function vremap (available only in later 1.3.xx kernels)
371 * allows the access to memory addresses above the RAM. This revision
372 * of the driver supports PCI boards below 1Mb (device id 0x100) and
373 * above 1Mb (device id 0x101).
374 *
375 * Revision 1.36.3.5 1996/03/07 15:20:17 bentson
376 * Some global changes to interrupt handling spilled into
377 * this driver--mostly unused arguments in system function
378 * calls. Also added change by Marcio Saito which should
379 * reduce lost interrupts at startup by fast processors.
380 *
381 * Revision 1.36.3.4 1995/11/13 20:45:10 bentson
382 * Changes by Corey Minyard <minyard@wf-rch.cirr.com> distributed
383 * in 1.3.41 kernel to remove a possible race condition, extend
384 * some error messages, and let the driver run as a loadable module
385 * Change by Alan Wendt <alan@ez0.ezlink.com> to remove a
386 * possible race condition.
387 * Change by Marcio Saito <marcio@cyclades.com> to fix PCI addressing.
388 *
389 * Revision 1.36.3.3 1995/11/13 19:44:48 bentson
390 * Changes by Linus Torvalds in 1.3.33 kernel distribution
391 * required due to reordering of driver initialization.
392 * Drivers are now initialized *after* memory management.
393 *
394 * Revision 1.36.3.2 1995/09/08 22:07:14 bentson
395 * remove printk from ISR; fix typo
396 *
397 * Revision 1.36.3.1 1995/09/01 12:00:42 marcio
398 * Minor fixes in the PCI board support. PCI function calls in
399 * conditional compilation (CONFIG_PCI). Thanks to Jim Duncan
400 * <duncan@okay.com>. "bad serial count" message removed.
401 *
402 * Revision 1.36.3 1995/08/22 09:19:42 marcio
403 * Cyclom-Y/PCI support added. Changes in the cy_init routine and
404 * board initialization. Changes in the boot messages. The driver
405 * supports up to 4 boards and 64 ports by default.
406 *
407 * Revision 1.36.1.4 1995/03/29 06:14:14 bentson
408 * disambiguate between Cyclom-16Y and Cyclom-32Ye;
409 *
410 * Revision 1.36.1.3 1995/03/23 22:15:35 bentson
411 * add missing break in modem control block in ioctl switch statement
412 * (discovered by Michael Edward Chastain <mec@jobe.shell.portal.com>);
413 *
414 * Revision 1.36.1.2 1995/03/22 19:16:22 bentson
415 * make sure CTS flow control is set as soon as possible (thanks
416 * to note from David Lambert <lambert@chesapeake.rps.slb.com>);
417 *
418 * Revision 1.36.1.1 1995/03/13 15:44:43 bentson
419 * initialize defaults for receive threshold and stale data timeout;
420 * cosmetic changes;
421 *
422 * Revision 1.36 1995/03/10 23:33:53 bentson
423 * added support of chips 4-7 in 32 port Cyclom-Ye;
424 * fix cy_interrupt pointer dereference problem
425 * (Joe Portman <baron@aa.net>);
426 * give better error response if open is attempted on non-existent port
427 * (Zachariah Vaum <jchryslr@netcom.com>);
428 * correct command timeout (Kenneth Lerman <lerman@@seltd.newnet.com>);
429 * conditional compilation for -16Y on systems with fast, noisy bus;
430 * comment out diagnostic print function;
431 * cleaned up table of base addresses;
432 * set receiver time-out period register to correct value,
433 * set receive threshold to better default values,
434 * set chip timer to more accurate 200 Hz ticking,
435 * add code to monitor and modify receive parameters
436 * (Rik Faith <faith@cs.unc.edu> Nick Simicich
437 * <njs@scifi.emi.net>);
438 *
439 * Revision 1.35 1994/12/16 13:54:18 steffen
440 * additional patch by Marcio Saito for board detection
441 * Accidently left out in 1.34
442 *
443 * Revision 1.34 1994/12/10 12:37:12 steffen
444 * This is the corrected version as suggested by Marcio Saito
445 *
446 * Revision 1.33 1994/12/01 22:41:18 bentson
447 * add hooks to support more high speeds directly; add tytso
448 * patch regarding CLOCAL wakeups
449 *
450 * Revision 1.32 1994/11/23 19:50:04 bentson
451 * allow direct kernel control of higher signalling rates;
452 * look for cards at additional locations
453 *
454 * Revision 1.31 1994/11/16 04:33:28 bentson
455 * ANOTHER fix from Corey Minyard, minyard@wf-rch.cirr.com--
456 * a problem in chars_in_buffer has been resolved by some
457 * small changes; this should yield smoother output
458 *
459 * Revision 1.30 1994/11/16 04:28:05 bentson
460 * Fix from Corey Minyard, Internet: minyard@metronet.com,
461 * UUCP: minyard@wf-rch.cirr.com, WORK: minyardbnr.ca, to
462 * cy_hangup that appears to clear up much (all?) of the
463 * DTR glitches; also he's added/cleaned-up diagnostic messages
464 *
465 * Revision 1.29 1994/11/16 04:16:07 bentson
466 * add change proposed by Ralph Sims, ralphs@halcyon.com, to
467 * operate higher speeds in same way as other serial ports;
468 * add more serial ports (for up to two 16-port muxes).
469 *
470 * Revision 1.28 1994/11/04 00:13:16 root
471 * turn off diagnostic messages
472 *
473 * Revision 1.27 1994/11/03 23:46:37 root
474 * bunch of changes to bring driver into greater conformance
475 * with the serial.c driver (looking for missed fixes)
476 *
477 * Revision 1.26 1994/11/03 22:40:36 root
478 * automatic interrupt probing fixed.
479 *
480 * Revision 1.25 1994/11/03 20:17:02 root
481 * start to implement auto-irq
482 *
483 * Revision 1.24 1994/11/03 18:01:55 root
484 * still working on modem signals--trying not to drop DTR
485 * during the getty/login processes
486 *
487 * Revision 1.23 1994/11/03 17:51:36 root
488 * extend baud rate support; set receive threshold as function
489 * of baud rate; fix some problems with RTS/CTS;
490 *
491 * Revision 1.22 1994/11/02 18:05:35 root
492 * changed arguments to udelay to type long to get
493 * delays to be of correct duration
494 *
495 * Revision 1.21 1994/11/02 17:37:30 root
496 * employ udelay (after calibrating loops_per_second earlier
497 * in init/main.c) instead of using home-grown delay routines
498 *
499 * Revision 1.20 1994/11/02 03:11:38 root
500 * cy_chars_in_buffer forces a return value of 0 to let
501 * login work (don't know why it does); some functions
502 * that were returning EFAULT, now executes the code;
503 * more work on deciding when to disable xmit interrupts;
504 *
505 * Revision 1.19 1994/11/01 20:10:14 root
506 * define routine to start transmission interrupts (by enabling
507 * transmit interrupts); directly enable/disable modem interrupts;
508 *
509 * Revision 1.18 1994/11/01 18:40:45 bentson
510 * Don't always enable transmit interrupts in startup; interrupt on
511 * TxMpty instead of TxRdy to help characters get out before shutdown;
512 * restructure xmit interrupt to check for chars first and quit if
513 * none are ready to go; modem status (MXVRx) is upright, _not_ inverted
514 * (to my view);
515 *
516 * Revision 1.17 1994/10/30 04:39:45 bentson
517 * rename serial_driver and callout_driver to cy_serial_driver and
518 * cy_callout_driver to avoid linkage interference; initialize
519 * info->type to PORT_CIRRUS; ruggedize paranoia test; elide ->port
520 * from cyclades_port structure; add paranoia check to cy_close;
521 *
522 * Revision 1.16 1994/10/30 01:14:33 bentson
523 * change major numbers; add some _early_ return statements;
524 *
525 * Revision 1.15 1994/10/29 06:43:15 bentson
526 * final tidying up for clean compile; enable some error reporting
527 *
528 * Revision 1.14 1994/10/28 20:30:22 Bentson
529 * lots of changes to drag the driver towards the new tty_io
530 * structures and operation. not expected to work, but may
531 * compile cleanly.
532 *
533 * Revision 1.13 1994/07/21 23:08:57 Bentson
534 * add some diagnostic cruft; support 24 lines (for testing
535 * both -8Y and -16Y cards; be more thorough in servicing all
536 * chips during interrupt; add "volatile" a few places to
537 * circumvent compiler optimizations; fix base & offset
538 * computations in block_til_ready (was causing chip 0 to
539 * stop operation)
540 *
541 * Revision 1.12 1994/07/19 16:42:11 Bentson
542 * add some hackery for kernel version 1.1.8; expand
543 * error messages; refine timing for delay loops and
544 * declare loop params volatile
545 *
546 * Revision 1.11 1994/06/11 21:53:10 bentson
547 * get use of save_car right in transmit interrupt service
548 *
549 * Revision 1.10.1.1 1994/06/11 21:31:18 bentson
550 * add some diagnostic printing; try to fix save_car stuff
551 *
552 * Revision 1.10 1994/06/11 20:36:08 bentson
553 * clean up compiler warnings
554 *
555 * Revision 1.9 1994/06/11 19:42:46 bentson
556 * added a bunch of code to support modem signalling
557 *
558 * Revision 1.8 1994/06/11 17:57:07 bentson
559 * recognize break & parity error
560 *
561 * Revision 1.7 1994/06/05 05:51:34 bentson
562 * Reorder baud table to be monotonic; add cli to CP; discard
563 * incoming characters and status if the line isn't open; start to
564 * fold code into cy_throttle; start to port get_serial_info,
565 * set_serial_info, get_modem_info, set_modem_info, and send_break
566 * from serial.c; expand cy_ioctl; relocate and expand config_setup;
567 * get flow control characters from tty struct; invalidate ports w/o
568 * hardware;
569 *
570 * Revision 1.6 1994/05/31 18:42:21 bentson
571 * add a loop-breaker in the interrupt service routine;
572 * note when port is initialized so that it can be shut
573 * down under the right conditions; receive works without
574 * any obvious errors
575 *
576 * Revision 1.5 1994/05/30 00:55:02 bentson
577 * transmit works without obvious errors
578 *
579 * Revision 1.4 1994/05/27 18:46:27 bentson
580 * incorporated more code from lib_y.c; can now print short
581 * strings under interrupt control to port zero; seems to
582 * select ports/channels/lines correctly
583 *
584 * Revision 1.3 1994/05/25 22:12:44 bentson
585 * shifting from multi-port on a card to proper multiplexor
586 * data structures; added skeletons of most routines
587 *
588 * Revision 1.2 1994/05/19 13:21:43 bentson
589 * start to crib from other sources
590 *
591 */
592
c8e1693a 593#define CY_VERSION "2.5"
096dcfce 594
1da177e4
LT		 595/* If you need to install more boards than NR_CARDS, change the constant
596 in the definition below. No other change is necessary to support up to
597 eight boards. Beyond that you'll have to extend cy_isa_addresses. */
598
02f1175c 599#define NR_CARDS 4
1da177e4
LT		 600
601/*
602 If the total number of ports is larger than NR_PORTS, change this
603 constant in the definition below. No other change is necessary to
604 support more boards/ports. */
605
02f1175c 606#define NR_PORTS 256
1da177e4
LT		 607
608#define ZE_V1_NPORTS 64
609#define ZO_V1 0
610#define ZO_V2 1
611#define ZE_V1 2
612
613#define SERIAL_PARANOIA_CHECK
614#undef CY_DEBUG_OPEN
615#undef CY_DEBUG_THROTTLE
616#undef CY_DEBUG_OTHER
617#undef CY_DEBUG_IO
618#undef CY_DEBUG_COUNT
619#undef CY_DEBUG_DTR
620#undef CY_DEBUG_WAIT_UNTIL_SENT
621#undef CY_DEBUG_INTERRUPTS
622#undef CY_16Y_HACK
623#undef CY_ENABLE_MONITORING
624#undef CY_PCI_DEBUG
625
1da177e4
LT		 626/*
627 * Include section
628 */
1da177e4
LT		 629#include <linux/module.h>
630#include <linux/errno.h>
631#include <linux/signal.h>
632#include <linux/sched.h>
633#include <linux/timer.h>
634#include <linux/interrupt.h>
635#include <linux/tty.h>
33f0f88f 636#include <linux/tty_flip.h>
1da177e4
LT		 637#include <linux/serial.h>
638#include <linux/major.h>
639#include <linux/string.h>
640#include <linux/fcntl.h>
641#include <linux/ptrace.h>
642#include <linux/cyclades.h>
643#include <linux/mm.h>
644#include <linux/ioport.h>
645#include <linux/init.h>
646#include <linux/delay.h>
647#include <linux/spinlock.h>
648#include <linux/bitops.h>
649
650#include <asm/system.h>
651#include <asm/io.h>
652#include <asm/irq.h>
653#include <asm/uaccess.h>
654
1da177e4
LT		 655#include <linux/kernel.h>
656#include <linux/pci.h>
657
658#include <linux/stat.h>
659#include <linux/proc_fs.h>
660
02f1175c
JS		 661static void cy_throttle(struct tty_struct *tty);
662static void cy_send_xchar(struct tty_struct *tty, char ch);
1da177e4
LT		 663
664#define IS_CYC_Z(card) ((card).num_chips == -1)
665
666#define Z_FPGA_CHECK(card) \
db05c3b1 667 ((readl(&((struct RUNTIME_9060 __iomem *) \
02f1175c 668 ((card).ctl_addr))->init_ctrl) & (1<<17)) != 0)
1da177e4 669
db05c3b1 670#define ISZLOADED(card) (((ZO_V1==readl(&((struct RUNTIME_9060 __iomem *) \
1da177e4
LT		 671 ((card).ctl_addr))->mail_box_0)) || \
672 Z_FPGA_CHECK(card)) && \
db05c3b1 673 (ZFIRM_ID==readl(&((struct FIRM_ID __iomem *) \
1da177e4
LT		 674 ((card).base_addr+ID_ADDRESS))->signature)))
675
676#ifndef SERIAL_XMIT_SIZE
677#define SERIAL_XMIT_SIZE (min(PAGE_SIZE, 4096))
678#endif
679#define WAKEUP_CHARS 256
680
681#define STD_COM_FLAGS (0)
682
1da177e4
LT		 683static struct tty_driver *cy_serial_driver;
684
685#ifdef CONFIG_ISA
686/* This is the address lookup table. The driver will probe for
687 Cyclom-Y/ISA boards at all addresses in here. If you want the
688 driver to probe addresses at a different address, add it to
689 this table. If the driver is probing some other board and
690 causing problems, remove the offending address from this table.
691 The cy_setup function extracts additional addresses from the
692 boot options line. The form is "cyclades=address,address..."
693*/
694
695static unsigned int cy_isa_addresses[] = {
02f1175c
JS		 696 0xD0000,
697 0xD2000,
698 0xD4000,
699 0xD6000,
700 0xD8000,
701 0xDA000,
702 0xDC000,
703 0xDE000,
704 0, 0, 0, 0, 0, 0, 0, 0
1da177e4 705};
02f1175c 706
fe971071 707#define NR_ISA_ADDRS ARRAY_SIZE(cy_isa_addresses)
1da177e4
LT		 708
709#ifdef MODULE
3046d50e
JS		 710static long maddr[NR_CARDS];
711static int irq[NR_CARDS];
1da177e4
LT		 712
713module_param_array(maddr, long, NULL, 0);
714module_param_array(irq, int, NULL, 0);
715#endif
716
02f1175c 717#endif /* CONFIG_ISA */
1da177e4
LT		 718
719/* This is the per-card data structure containing address, irq, number of
720 channels, etc. This driver supports a maximum of NR_CARDS cards.
721*/
722static struct cyclades_card cy_card[NR_CARDS];
723
02f1175c 724static int cy_next_channel; /* next minor available */
1da177e4 725
1da177e4
LT		 726/*
727 * This is used to look up the divisor speeds and the timeouts
728 * We're normally limited to 15 distinct baud rates. The extra
729 * are accessed via settings in info->flags.
730 * 0, 1, 2, 3, 4, 5, 6, 7, 8, 9,
731 * 10, 11, 12, 13, 14, 15, 16, 17, 18, 19,
732 * HI VHI
733 * 20
734 */
735static int baud_table[] = {
02f1175c
JS		 736 0, 50, 75, 110, 134, 150, 200, 300, 600, 1200,
737 1800, 2400, 4800, 9600, 19200, 38400, 57600, 76800, 115200, 150000,
738 230400, 0
739};
740
741static char baud_co_25[] = { /* 25 MHz clock option table */
742 /* value => 00 01 02 03 04 */
743 /* divide by 8 32 128 512 2048 */
744 0x00, 0x04, 0x04, 0x04, 0x04, 0x04, 0x03, 0x03, 0x03, 0x02,
745 0x02, 0x02, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
746};
747
748static char baud_bpr_25[] = { /* 25 MHz baud rate period table */
749 0x00, 0xf5, 0xa3, 0x6f, 0x5c, 0x51, 0xf5, 0xa3, 0x51, 0xa3,
750 0x6d, 0x51, 0xa3, 0x51, 0xa3, 0x51, 0x36, 0x29, 0x1b, 0x15
751};
752
753static char baud_co_60[] = { /* 60 MHz clock option table (CD1400 J) */
754 /* value => 00 01 02 03 04 */
755 /* divide by 8 32 128 512 2048 */
756 0x00, 0x00, 0x00, 0x04, 0x04, 0x04, 0x04, 0x04, 0x03, 0x03,
757 0x03, 0x02, 0x02, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00,
758 0x00
759};
760
761static char baud_bpr_60[] = { /* 60 MHz baud rate period table (CD1400 J) */
762 0x00, 0x82, 0x21, 0xff, 0xdb, 0xc3, 0x92, 0x62, 0xc3, 0x62,
763 0x41, 0xc3, 0x62, 0xc3, 0x62, 0xc3, 0x82, 0x62, 0x41, 0x32,
764 0x21
765};
766
767static char baud_cor3[] = { /* receive threshold */
768 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a,
769 0x0a, 0x0a, 0x0a, 0x09, 0x09, 0x08, 0x08, 0x08, 0x08, 0x07,
770 0x07
771};
1da177e4
LT		 772
773/*
774 * The Cyclades driver implements HW flow control as any serial driver.
775 * The cyclades_port structure member rflow and the vector rflow_thr
776 * allows us to take advantage of a special feature in the CD1400 to avoid
777 * data loss even when the system interrupt latency is too high. These flags
778 * are to be used only with very special applications. Setting these flags
779 * requires the use of a special cable (DTR and RTS reversed). In the new
780 * CD1400-based boards (rev. 6.00 or later), there is no need for special
781 * cables.
782 */
783
02f1175c
JS		 784static char rflow_thr[] = { /* rflow threshold */
785 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
786 0x00, 0x00, 0x00, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a,
787 0x0a
788};
1da177e4
LT		 789
790/* The Cyclom-Ye has placed the sequential chips in non-sequential
791 * address order. This look-up table overcomes that problem.
792 */
02f1175c
JS		 793static int cy_chip_offset[] = { 0x0000,
794 0x0400,
795 0x0800,
796 0x0C00,
797 0x0200,
798 0x0600,
799 0x0A00,
800 0x0E00
801};
1da177e4
LT		 802
803/* PCI related definitions */
804
1da177e4 805#ifdef CONFIG_PCI
893de2df
JS		 806static struct pci_device_id cy_pci_dev_id[] __devinitdata = {
807 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Y_Lo) }, /* PCI < 1Mb */
808 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Y_Hi) }, /* PCI > 1Mb */
809 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_4Y_Lo) }, /* 4Y PCI < 1Mb */
810 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_4Y_Hi) }, /* 4Y PCI > 1Mb */
811 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_8Y_Lo) }, /* 8Y PCI < 1Mb */
812 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_8Y_Hi) }, /* 8Y PCI > 1Mb */
813 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Z_Lo) }, /* Z PCI < 1Mb */
814 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Z_Hi) }, /* Z PCI > 1Mb */
815 { } /* end of table */
02f1175c 816};
893de2df 817MODULE_DEVICE_TABLE(pci, cy_pci_dev_id);
1da177e4
LT		 818#endif
819
820static void cy_start(struct tty_struct *);
821static void set_line_char(struct cyclades_port *);
1a86b5e3 822static int cyz_issue_cmd(struct cyclades_card *, __u32, __u8, __u32);
1da177e4
LT		 823#ifdef CONFIG_ISA
824static unsigned detect_isa_irq(void __iomem *);
02f1175c 825#endif /* CONFIG_ISA */
1da177e4 826
02f1175c 827static int cyclades_get_proc_info(char *, char **, off_t, int, int *, void *);
1da177e4
LT		 828
829#ifndef CONFIG_CYZ_INTR
830static void cyz_poll(unsigned long);
831
832/* The Cyclades-Z polling cycle is defined by this variable */
833static long cyz_polling_cycle = CZ_DEF_POLL;
834
8d06afab 835static DEFINE_TIMER(cyz_timerlist, cyz_poll, 0, 0);
1da177e4 836
02f1175c 837#else /* CONFIG_CYZ_INTR */
1da177e4
LT		 838static void cyz_rx_restart(unsigned long);
839static struct timer_list cyz_rx_full_timer[NR_PORTS];
02f1175c 840#endif /* CONFIG_CYZ_INTR */
1da177e4 841
02f1175c
JS		 842static inline int serial_paranoia_check(struct cyclades_port *info,
843 char *name, const char *routine)
1da177e4
LT		 844{
845#ifdef SERIAL_PARANOIA_CHECK
02f1175c 846 if (!info) {
21719191
JS		 847 printk(KERN_WARNING "cyc Warning: null cyclades_port for (%s) "
848 "in %s\n", name, routine);
02f1175c
JS		 849 return 1;
850 }
851
02f1175c 852 if (info->magic != CYCLADES_MAGIC) {
21719191
JS		 853 printk(KERN_WARNING "cyc Warning: bad magic number for serial "
854 "struct (%s) in %s\n", name, routine);
02f1175c
JS		 855 return 1;
856 }
1da177e4 857#endif
02f1175c
JS		 858 return 0;
859} /* serial_paranoia_check */
1da177e4
LT		 860
861/*
862 * This routine is used by the interrupt handler to schedule
863 * processing in the software interrupt portion of the driver
864 * (also known as the "bottom half"). This can be called any
865 * number of times for any channel without harm.
866 */
02f1175c 867static inline void cy_sched_event(struct cyclades_port *info, int event)
1da177e4 868{
02f1175c
JS		 869 info->event |= 1 << event; /* remember what kind of event and who */
870 schedule_work(&info->tqueue);
871} /* cy_sched_event */
1da177e4
LT		 872
873/*
874 * This routine is used to handle the "bottom half" processing for the
875 * serial driver, known also the "software interrupt" processing.
876 * This processing is done at the kernel interrupt level, after the
877 * cy#/_interrupt() has returned, BUT WITH INTERRUPTS TURNED ON. This
878 * is where time-consuming activities which can not be done in the
879 * interrupt driver proper are done; the interrupt driver schedules
880 * them using cy_sched_event(), and they get done here.
881 *
882 * This is done through one level of indirection--the task queue.
883 * When a hardware interrupt service routine wants service by the
884 * driver's bottom half, it enqueues the appropriate tq_struct (one
885 * per port) to the keventd work queue and sets a request flag
886 * that the work queue be processed.
887 *
888 * Although this may seem unwieldy, it gives the system a way to
889 * pass an argument (in this case the pointer to the cyclades_port
890 * structure) to the bottom half of the driver. Previous kernels
891 * had to poll every port to see if that port needed servicing.
892 */
893static void
c4028958 894do_softint(struct work_struct *work)
1da177e4 895{
c4028958
DH		 896 struct cyclades_port *info =
897 container_of(work, struct cyclades_port, tqueue);
02f1175c
JS		 898 struct tty_struct *tty;
899
900 tty = info->tty;
901 if (!tty)
902 return;
903
904 if (test_and_clear_bit(Cy_EVENT_HANGUP, &info->event)) {
905 tty_hangup(info->tty);
906 wake_up_interruptible(&info->open_wait);
907 info->flags &= ~ASYNC_NORMAL_ACTIVE;
908 }
909 if (test_and_clear_bit(Cy_EVENT_OPEN_WAKEUP, &info->event))
910 wake_up_interruptible(&info->open_wait);
1da177e4 911#ifdef CONFIG_CYZ_INTR
3991428d
JS		 912 if (test_and_clear_bit(Cy_EVENT_Z_RX_FULL, &info->event) &&
913 !timer_pending(&cyz_rx_full_timer[info->line]))
914 mod_timer(&cyz_rx_full_timer[info->line], jiffies + 1);
1da177e4 915#endif
02f1175c
JS		 916 if (test_and_clear_bit(Cy_EVENT_DELTA_WAKEUP, &info->event))
917 wake_up_interruptible(&info->delta_msr_wait);
918 tty_wakeup(tty);
1da177e4 919#ifdef Z_WAKE
02f1175c 920 if (test_and_clear_bit(Cy_EVENT_SHUTDOWN_WAKEUP, &info->event))
2c7fea99 921 complete(&info->shutdown_wait);
1da177e4
LT		 922#endif
923} /* do_softint */
924
925
926/***********************************************************/
927/********* Start of block of Cyclom-Y specific code ********/
928
929/* This routine waits up to 1000 micro-seconds for the previous
930 command to the Cirrus chip to complete and then issues the
931 new command. An error is returned if the previous command
932 didn't finish within the time limit.
933
934 This function is only called from inside spinlock-protected code.
935 */
02f1175c 936static int cyy_issue_cmd(void __iomem * base_addr, u_char cmd, int index)
1da177e4 937{
ad39c300 938 unsigned int i;
1da177e4 939
02f1175c
JS		 940 /* Check to see that the previous command has completed */
941 for (i = 0; i < 100; i++) {
db05c3b1 942 if (readb(base_addr + (CyCCR << index)) == 0) {
02f1175c
JS		 943 break;
944 }
945 udelay(10L);
1da177e4 946 }
02f1175c
JS		 947 /* if the CCR never cleared, the previous command
948 didn't finish within the "reasonable time" */
949 if (i == 100)
096dcfce 950 return -1;
1da177e4 951
02f1175c
JS		 952 /* Issue the new command */
953 cy_writeb(base_addr + (CyCCR << index), cmd);
1da177e4 954
096dcfce 955 return 0;
02f1175c 956} /* cyy_issue_cmd */
1da177e4
LT		 957
958#ifdef CONFIG_ISA
959/* ISA interrupt detection code */
02f1175c 960static unsigned detect_isa_irq(void __iomem * address)
1da177e4 961{
02f1175c
JS		 962 int irq;
963 unsigned long irqs, flags;
964 int save_xir, save_car;
965 int index = 0; /* IRQ probing is only for ISA */
966
967 /* forget possible initially masked and pending IRQ */
968 irq = probe_irq_off(probe_irq_on());
969
970 /* Clear interrupts on the board first */
971 cy_writeb(address + (Cy_ClrIntr << index), 0);
972 /* Cy_ClrIntr is 0x1800 */
973
974 irqs = probe_irq_on();
975 /* Wait ... */
976 udelay(5000L);
977
978 /* Enable the Tx interrupts on the CD1400 */
979 local_irq_save(flags);
980 cy_writeb(address + (CyCAR << index), 0);
981 cyy_issue_cmd(address, CyCHAN_CTL | CyENB_XMTR, index);
982
983 cy_writeb(address + (CyCAR << index), 0);
984 cy_writeb(address + (CySRER << index),
db05c3b1 985 readb(address + (CySRER << index)) | CyTxRdy);
02f1175c
JS		 986 local_irq_restore(flags);
987
988 /* Wait ... */
989 udelay(5000L);
990
991 /* Check which interrupt is in use */
992 irq = probe_irq_off(irqs);
993
994 /* Clean up */
db05c3b1
JS		 995 save_xir = (u_char) readb(address + (CyTIR << index));
996 save_car = readb(address + (CyCAR << index));
02f1175c
JS		 997 cy_writeb(address + (CyCAR << index), (save_xir & 0x3));
998 cy_writeb(address + (CySRER << index),
db05c3b1 999 readb(address + (CySRER << index)) & ~CyTxRdy);
02f1175c
JS		 1000 cy_writeb(address + (CyTIR << index), (save_xir & 0x3f));
1001 cy_writeb(address + (CyCAR << index), (save_car));
1002 cy_writeb(address + (Cy_ClrIntr << index), 0);
1003 /* Cy_ClrIntr is 0x1800 */
1004
1005 return (irq > 0) ? irq : 0;
1da177e4 1006}
02f1175c 1007#endif /* CONFIG_ISA */
1da177e4 1008
e941027f 1009static void cyy_intr_chip(struct cyclades_card *cinfo, int chip,
02f1175c 1010 void __iomem * base_addr, int status, int index)
e941027f
JS		 1011{
1012 struct cyclades_port *info;
1013 struct tty_struct *tty;
ad39c300 1014 int char_count;
dd025c0c 1015 int j, len, mdm_change, mdm_status, outch;
e941027f
JS		 1016 int save_xir, channel, save_car;
1017 char data;
1018
02f1175c 1019 if (status & CySRReceive) { /* reception interrupt */
e941027f 1020#ifdef CY_DEBUG_INTERRUPTS
21719191 1021 printk(KERN_DEBUG "cyy_interrupt: rcvd intr, chip %d\n", chip);
e941027f 1022#endif
02f1175c
JS		 1023 /* determine the channel & change to that context */
1024 spin_lock(&cinfo->card_lock);
db05c3b1 1025 save_xir = (u_char) readb(base_addr + (CyRIR << index));
02f1175c 1026 channel = (u_short) (save_xir & CyIRChannel);
dd025c0c 1027 info = &cinfo->ports[channel + chip * 4];
db05c3b1 1028 save_car = readb(base_addr + (CyCAR << index));
02f1175c
JS		 1029 cy_writeb(base_addr + (CyCAR << index), save_xir);
1030
1031 /* if there is nowhere to put the data, discard it */
f7429034 1032 if (info->tty == NULL) {
db05c3b1 1033 j = (readb(base_addr + (CyRIVR << index)) &
02f1175c
JS		 1034 CyIVRMask);
1035 if (j == CyIVRRxEx) { /* exception */
db05c3b1 1036 data = readb(base_addr + (CyRDSR << index));
02f1175c 1037 } else { /* normal character reception */
db05c3b1 1038 char_count = readb(base_addr +
02f1175c
JS		 1039 (CyRDCR << index));
1040 while (char_count--) {
db05c3b1 1041 data = readb(base_addr +
02f1175c 1042 (CyRDSR << index));
e941027f 1043 }
e941027f 1044 }
02f1175c
JS		 1045 } else { /* there is an open port for this data */
1046 tty = info->tty;
db05c3b1 1047 j = (readb(base_addr + (CyRIVR << index)) &
02f1175c
JS		 1048 CyIVRMask);
1049 if (j == CyIVRRxEx) { /* exception */
db05c3b1 1050 data = readb(base_addr + (CyRDSR << index));
02f1175c
JS		 1051
1052 /* For statistics only */
1053 if (data & CyBREAK)
1054 info->icount.brk++;
1055 else if (data & CyFRAME)
1056 info->icount.frame++;
1057 else if (data & CyPARITY)
1058 info->icount.parity++;
1059 else if (data & CyOVERRUN)
1060 info->icount.overrun++;
1061
1062 if (data & info->ignore_status_mask) {
1063 info->icount.rx++;
1064 return;
1065 }
1066 if (tty_buffer_request_room(tty, 1)) {
1067 if (data & info->read_status_mask) {
1068 if (data & CyBREAK) {
1069 tty_insert_flip_char(
1070 tty,
db05c3b1 1071 readb(
02f1175c
JS		 1072 base_addr +
1073 (CyRDSR <<
1074 index)),
1075 TTY_BREAK);
1076 info->icount.rx++;
1077 if (info->flags &
1078 ASYNC_SAK) {
1079 do_SAK(tty);
1080 }
1081 } else if (data & CyFRAME) {
1082 tty_insert_flip_char(
1083 tty,
db05c3b1 1084 readb(
02f1175c
JS		 1085 base_addr +
1086 (CyRDSR <<
1087 index)),
1088 TTY_FRAME);
1089 info->icount.rx++;
1090 info->idle_stats.
1091 frame_errs++;
1092 } else if (data & CyPARITY) {
1093 /* Pieces of seven... */
1094 tty_insert_flip_char(
1095 tty,
db05c3b1 1096 readb(
02f1175c
JS		 1097 base_addr +
1098 (CyRDSR <<
1099 index)),
1100 TTY_PARITY);
1101 info->icount.rx++;
1102 info->idle_stats.
1103 parity_errs++;
1104 } else if (data & CyOVERRUN) {
1105 tty_insert_flip_char(
1106 tty, 0,
1107 TTY_OVERRUN);
1108 info->icount.rx++;
1109 /* If the flip buffer itself is
1110 overflowing, we still lose
1111 the next incoming character.
1112 */
1113 tty_insert_flip_char(
1114 tty,
db05c3b1 1115 readb(
02f1175c
JS		 1116 base_addr +
1117 (CyRDSR <<
1118 index)),
1119 TTY_FRAME);
1120 info->icount.rx++;
1121 info->idle_stats.
1122 overruns++;
1123 /* These two conditions may imply */
1124 /* a normal read should be done. */
1125 /* }else if(data & CyTIMEOUT){ */
1126 /* }else if(data & CySPECHAR){ */
1127 } else {
1128 tty_insert_flip_char(
1129 tty, 0,
1130 TTY_NORMAL);
1131 info->icount.rx++;
1132 }
1133 } else {
1134 tty_insert_flip_char(tty, 0,
1135 TTY_NORMAL);
1136 info->icount.rx++;
1137 }
1138 } else {
1139 /* there was a software buffer
1140 overrun and nothing could be
1141 done about it!!! */
1142 info->icount.buf_overrun++;
1143 info->idle_stats.overruns++;
1144 }
1145 } else { /* normal character reception */
1146 /* load # chars available from the chip */
db05c3b1 1147 char_count = readb(base_addr +
02f1175c 1148 (CyRDCR << index));
e941027f
JS		 1149
1150#ifdef CY_ENABLE_MONITORING
02f1175c
JS		 1151 ++info->mon.int_count;
1152 info->mon.char_count += char_count;
1153 if (char_count > info->mon.char_max)
1154 info->mon.char_max = char_count;
1155 info->mon.char_last = char_count;
e941027f 1156#endif
02f1175c
JS		 1157 len = tty_buffer_request_room(tty, char_count);
1158 while (len--) {
db05c3b1 1159 data = readb(base_addr +
02f1175c
JS		 1160 (CyRDSR << index));
1161 tty_insert_flip_char(tty, data,
1162 TTY_NORMAL);
1163 info->idle_stats.recv_bytes++;
1164 info->icount.rx++;
e941027f 1165#ifdef CY_16Y_HACK
02f1175c 1166 udelay(10L);
e941027f 1167#endif
02f1175c
JS		 1168 }
1169 info->idle_stats.recv_idle = jiffies;
1170 }
1171 tty_schedule_flip(tty);
e941027f 1172 }
02f1175c
JS		 1173 /* end of service */
1174 cy_writeb(base_addr + (CyRIR << index), (save_xir & 0x3f));
1175 cy_writeb(base_addr + (CyCAR << index), (save_car));
1176 spin_unlock(&cinfo->card_lock);
e941027f
JS		 1177 }
1178
02f1175c
JS		 1179 if (status & CySRTransmit) { /* transmission interrupt */
1180 /* Since we only get here when the transmit buffer
1181 is empty, we know we can always stuff a dozen
1182 characters. */
e941027f 1183#ifdef CY_DEBUG_INTERRUPTS
21719191 1184 printk(KERN_DEBUG "cyy_interrupt: xmit intr, chip %d\n", chip);
e941027f
JS		 1185#endif
1186
02f1175c
JS		 1187 /* determine the channel & change to that context */
1188 spin_lock(&cinfo->card_lock);
db05c3b1 1189 save_xir = (u_char) readb(base_addr + (CyTIR << index));
02f1175c 1190 channel = (u_short) (save_xir & CyIRChannel);
db05c3b1 1191 save_car = readb(base_addr + (CyCAR << index));
02f1175c
JS		 1192 cy_writeb(base_addr + (CyCAR << index), save_xir);
1193
1194 /* validate the port# (as configured and open) */
dd025c0c 1195 if (channel + chip * 4 >= cinfo->nports) {
02f1175c 1196 cy_writeb(base_addr + (CySRER << index),
db05c3b1 1197 readb(base_addr + (CySRER << index)) &
02f1175c
JS		 1198 ~CyTxRdy);
1199 goto txend;
e941027f 1200 }
dd025c0c 1201 info = &cinfo->ports[channel + chip * 4];
f7429034 1202 if (info->tty == NULL) {
02f1175c 1203 cy_writeb(base_addr + (CySRER << index),
db05c3b1 1204 readb(base_addr + (CySRER << index)) &
02f1175c
JS		 1205 ~CyTxRdy);
1206 goto txdone;
e941027f 1207 }
02f1175c
JS		 1208
1209 /* load the on-chip space for outbound data */
1210 char_count = info->xmit_fifo_size;
1211
1212 if (info->x_char) { /* send special char */
1213 outch = info->x_char;
1214 cy_writeb(base_addr + (CyTDR << index), outch);
1215 char_count--;
1216 info->icount.tx++;
1217 info->x_char = 0;
e941027f 1218 }
02f1175c
JS		 1219
1220 if (info->breakon || info->breakoff) {
1221 if (info->breakon) {
1222 cy_writeb(base_addr + (CyTDR << index), 0);
1223 cy_writeb(base_addr + (CyTDR << index), 0x81);
1224 info->breakon = 0;
1225 char_count -= 2;
1226 }
1227 if (info->breakoff) {
1228 cy_writeb(base_addr + (CyTDR << index), 0);
1229 cy_writeb(base_addr + (CyTDR << index), 0x83);
1230 info->breakoff = 0;
1231 char_count -= 2;
1232 }
e941027f 1233 }
02f1175c
JS		 1234
1235 while (char_count-- > 0) {
1236 if (!info->xmit_cnt) {
db05c3b1 1237 if (readb(base_addr + (CySRER << index)) &
02f1175c
JS		 1238 CyTxMpty) {
1239 cy_writeb(base_addr + (CySRER << index),
db05c3b1 1240 readb(base_addr +
02f1175c
JS		 1241 (CySRER << index)) &
1242 ~CyTxMpty);
1243 } else {
1244 cy_writeb(base_addr + (CySRER << index),
db05c3b1 1245 (readb(base_addr +
02f1175c
JS		 1246 (CySRER << index)) &
1247 ~CyTxRdy) | CyTxMpty);
1248 }
1249 goto txdone;
1250 }
f7429034 1251 if (info->xmit_buf == NULL) {
02f1175c 1252 cy_writeb(base_addr + (CySRER << index),
db05c3b1 1253 readb(base_addr + (CySRER << index)) &
02f1175c
JS		 1254 ~CyTxRdy);
1255 goto txdone;
1256 }
1257 if (info->tty->stopped || info->tty->hw_stopped) {
1258 cy_writeb(base_addr + (CySRER << index),
db05c3b1 1259 readb(base_addr + (CySRER << index)) &
02f1175c
JS		 1260 ~CyTxRdy);
1261 goto txdone;
1262 }
1263 /* Because the Embedded Transmit Commands have
1264 been enabled, we must check to see if the
1265 escape character, NULL, is being sent. If it
1266 is, we must ensure that there is room for it
1267 to be doubled in the output stream. Therefore
1268 we no longer advance the pointer when the
1269 character is fetched, but rather wait until
1270 after the check for a NULL output character.
1271 This is necessary because there may not be
1272 room for the two chars needed to send a NULL.)
1273 */
1274 outch = info->xmit_buf[info->xmit_tail];
1275 if (outch) {
1276 info->xmit_cnt--;
1277 info->xmit_tail = (info->xmit_tail + 1) &
1278 (SERIAL_XMIT_SIZE - 1);
1279 cy_writeb(base_addr + (CyTDR << index), outch);
1280 info->icount.tx++;
1281 } else {
1282 if (char_count > 1) {
1283 info->xmit_cnt--;
1284 info->xmit_tail = (info->xmit_tail + 1)&
1285 (SERIAL_XMIT_SIZE - 1);
1286 cy_writeb(base_addr + (CyTDR << index),
1287 outch);
1288 cy_writeb(base_addr + (CyTDR << index),
1289 0);
1290 info->icount.tx++;
1291 char_count--;
02f1175c
JS		 1292 }
1293 }
e941027f 1294 }
e941027f
JS		 1295
1296txdone:
02f1175c
JS		 1297 if (info->xmit_cnt < WAKEUP_CHARS) {
1298 cy_sched_event(info, Cy_EVENT_WRITE_WAKEUP);
1299 }
e941027f 1300txend:
02f1175c
JS		 1301 /* end of service */
1302 cy_writeb(base_addr + (CyTIR << index), (save_xir & 0x3f));
1303 cy_writeb(base_addr + (CyCAR << index), (save_car));
1304 spin_unlock(&cinfo->card_lock);
e941027f
JS		 1305 }
1306
02f1175c 1307 if (status & CySRModem) { /* modem interrupt */
e941027f 1308
02f1175c
JS		 1309 /* determine the channel & change to that context */
1310 spin_lock(&cinfo->card_lock);
db05c3b1 1311 save_xir = (u_char) readb(base_addr + (CyMIR << index));
02f1175c 1312 channel = (u_short) (save_xir & CyIRChannel);
dd025c0c 1313 info = &cinfo->ports[channel + chip * 4];
db05c3b1 1314 save_car = readb(base_addr + (CyCAR << index));
02f1175c
JS		 1315 cy_writeb(base_addr + (CyCAR << index), save_xir);
1316
db05c3b1
JS		 1317 mdm_change = readb(base_addr + (CyMISR << index));
1318 mdm_status = readb(base_addr + (CyMSVR1 << index));
02f1175c 1319
f7429034 1320 if (info->tty) {
02f1175c
JS		 1321 if (mdm_change & CyANY_DELTA) {
1322 /* For statistics only */
1323 if (mdm_change & CyDCD)
1324 info->icount.dcd++;
1325 if (mdm_change & CyCTS)
1326 info->icount.cts++;
1327 if (mdm_change & CyDSR)
1328 info->icount.dsr++;
1329 if (mdm_change & CyRI)
1330 info->icount.rng++;
1331
1332 cy_sched_event(info, Cy_EVENT_DELTA_WAKEUP);
e941027f 1333 }
02f1175c
JS		 1334
1335 if ((mdm_change & CyDCD) &&
1336 (info->flags & ASYNC_CHECK_CD)) {
1337 if (mdm_status & CyDCD) {
1338 cy_sched_event(info,
1339 Cy_EVENT_OPEN_WAKEUP);
1340 } else {
1341 cy_sched_event(info, Cy_EVENT_HANGUP);
1342 }
1343 }
1344 if ((mdm_change & CyCTS) &&
1345 (info->flags & ASYNC_CTS_FLOW)) {
1346 if (info->tty->hw_stopped) {
1347 if (mdm_status & CyCTS) {
1348 /* cy_start isn't used
1349 because... !!! */
1350 info->tty->hw_stopped = 0;
1351 cy_writeb(base_addr +
1352 (CySRER << index),
db05c3b1 1353 readb(base_addr +
02f1175c
JS		 1354 (CySRER <<
1355 index))|
1356 CyTxRdy);
1357 cy_sched_event(info,
1358 Cy_EVENT_WRITE_WAKEUP);
1359 }
1360 } else {
1361 if (!(mdm_status & CyCTS)) {
1362 /* cy_stop isn't used
1363 because ... !!! */
1364 info->tty->hw_stopped = 1;
1365 cy_writeb(base_addr +
1366 (CySRER << index),
db05c3b1 1367 readb(base_addr +
02f1175c
JS		 1368 (CySRER <<
1369 index)) &
1370 ~CyTxRdy);
1371 }
1372 }
1373 }
f7429034 1374/* if (mdm_change & CyDSR) {
02f1175c
JS		 1375 }
1376 if (mdm_change & CyRI) {
f7429034 1377 }*/
e941027f 1378 }
02f1175c
JS		 1379 /* end of service */
1380 cy_writeb(base_addr + (CyMIR << index), (save_xir & 0x3f));
1381 cy_writeb(base_addr + (CyCAR << index), save_car);
1382 spin_unlock(&cinfo->card_lock);
e941027f
JS		 1383 }
1384}
1385
1da177e4
LT		 1386/* The real interrupt service routine is called
1387 whenever the card wants its hand held--chars
1388 received, out buffer empty, modem change, etc.
1389 */
02f1175c 1390static irqreturn_t cyy_interrupt(int irq, void *dev_id)
1da177e4 1391{
02f1175c 1392 int status;
f7429034 1393 struct cyclades_card *cinfo = dev_id;
02f1175c
JS		 1394 void __iomem *base_addr, *card_base_addr;
1395 int chip;
1396 int index;
1397 int too_many;
1398 int had_work;
1399
f7429034 1400 if (unlikely(cinfo == NULL)) {
1da177e4 1401#ifdef CY_DEBUG_INTERRUPTS
21719191 1402 printk(KERN_DEBUG "cyy_interrupt: spurious interrupt %d\n",irq);
1da177e4 1403#endif
02f1175c
JS		 1404 return IRQ_NONE; /* spurious interrupt */
1405 }
1406
1407 card_base_addr = cinfo->base_addr;
1408 index = cinfo->bus_index;
1409
f1e83c6c
JS		 1410 /* card was not initialized yet (e.g. DEBUG_SHIRQ) */
1411 if (unlikely(card_base_addr == NULL))
1412 return IRQ_HANDLED;
1413
02f1175c
JS		 1414 /* This loop checks all chips in the card. Make a note whenever
1415 _any_ chip had some work to do, as this is considered an
1416 indication that there will be more to do. Only when no chip
1417 has any work does this outermost loop exit.
1418 */
1419 do {
1420 had_work = 0;
1421 for (chip = 0; chip < cinfo->num_chips; chip++) {
1422 base_addr = cinfo->base_addr +
1423 (cy_chip_offset[chip] << index);
1424 too_many = 0;
db05c3b1 1425 while ((status = readb(base_addr +
02f1175c
JS		 1426 (CySVRR << index))) != 0x00) {
1427 had_work++;
1428 /* The purpose of the following test is to ensure that
1429 no chip can monopolize the driver. This forces the
1430 chips to be checked in a round-robin fashion (after
1431 draining each of a bunch (1000) of characters).
1432 */
1433 if (1000 < too_many++) {
1434 break;
1435 }
1436 cyy_intr_chip(cinfo, chip, base_addr, status,
1437 index);
1438 }
1439 }
1440 } while (had_work);
1441
1442 /* clear interrupts */
1443 spin_lock(&cinfo->card_lock);
1444 cy_writeb(card_base_addr + (Cy_ClrIntr << index), 0);
1445 /* Cy_ClrIntr is 0x1800 */
1446 spin_unlock(&cinfo->card_lock);
1447 return IRQ_HANDLED;
1448} /* cyy_interrupt */
1da177e4
LT		 1449
1450/***********************************************************/
1451/********* End of block of Cyclom-Y specific code **********/
1452/******** Start of block of Cyclades-Z specific code *********/
1453/***********************************************************/
1454
1455static int
02f1175c 1456cyz_fetch_msg(struct cyclades_card *cinfo,
1a86b5e3 1457 __u32 * channel, __u8 * cmd, __u32 * param)
1da177e4 1458{
02f1175c
JS		 1459 struct FIRM_ID __iomem *firm_id;
1460 struct ZFW_CTRL __iomem *zfw_ctrl;
1461 struct BOARD_CTRL __iomem *board_ctrl;
1462 unsigned long loc_doorbell;
1463
1464 firm_id = cinfo->base_addr + ID_ADDRESS;
1465 if (!ISZLOADED(*cinfo)) {
096dcfce 1466 return -1;
02f1175c 1467 }
db05c3b1 1468 zfw_ctrl = cinfo->base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
02f1175c
JS		 1469 board_ctrl = &zfw_ctrl->board_ctrl;
1470
db05c3b1 1471 loc_doorbell = readl(&((struct RUNTIME_9060 __iomem *)
02f1175c
JS		 1472 (cinfo->ctl_addr))->loc_doorbell);
1473 if (loc_doorbell) {
1474 *cmd = (char)(0xff & loc_doorbell);
db05c3b1
JS		 1475 *channel = readl(&board_ctrl->fwcmd_channel);
1476 *param = (__u32) readl(&board_ctrl->fwcmd_param);
02f1175c
JS		 1477 cy_writel(&((struct RUNTIME_9060 __iomem *)(cinfo->ctl_addr))->
1478 loc_doorbell, 0xffffffff);
1479 return 1;
1480 }
1481 return 0;
1482} /* cyz_fetch_msg */
1da177e4
LT		 1483
1484static int
02f1175c 1485cyz_issue_cmd(struct cyclades_card *cinfo,
1a86b5e3 1486 __u32 channel, __u8 cmd, __u32 param)
1da177e4 1487{
02f1175c
JS		 1488 struct FIRM_ID __iomem *firm_id;
1489 struct ZFW_CTRL __iomem *zfw_ctrl;
1490 struct BOARD_CTRL __iomem *board_ctrl;
1a86b5e3 1491 __u32 __iomem *pci_doorbell;
02f1175c
JS		 1492 int index;
1493
1494 firm_id = cinfo->base_addr + ID_ADDRESS;
1495 if (!ISZLOADED(*cinfo)) {
096dcfce 1496 return -1;
02f1175c 1497 }
db05c3b1 1498 zfw_ctrl = cinfo->base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
02f1175c
JS		 1499 board_ctrl = &zfw_ctrl->board_ctrl;
1500
1501 index = 0;
1502 pci_doorbell =
1503 &((struct RUNTIME_9060 __iomem *)(cinfo->ctl_addr))->pci_doorbell;
db05c3b1 1504 while ((readl(pci_doorbell) & 0xff) != 0) {
02f1175c 1505 if (index++ == 1000) {
db05c3b1 1506 return (int)(readl(pci_doorbell) & 0xff);
02f1175c
JS		 1507 }
1508 udelay(50L);
1509 }
1510 cy_writel(&board_ctrl->hcmd_channel, channel);
1511 cy_writel(&board_ctrl->hcmd_param, param);
1512 cy_writel(pci_doorbell, (long)cmd);
1513
096dcfce 1514 return 0;
02f1175c 1515} /* cyz_issue_cmd */
1da177e4
LT		 1516
1517static void
ad39c300
JS		 1518cyz_handle_rx(struct cyclades_port *info, struct CH_CTRL __iomem *ch_ctrl,
1519 struct BUF_CTRL __iomem *buf_ctrl)
1da177e4 1520{
875b206b 1521 struct cyclades_card *cinfo = info->card;
02f1175c 1522 struct tty_struct *tty = info->tty;
ad39c300 1523 int char_count;
02f1175c 1524 int len;
1da177e4 1525#ifdef BLOCKMOVE
ce71b0ff 1526 unsigned char *buf;
1da177e4 1527#else
02f1175c 1528 char data;
1da177e4 1529#endif
ad39c300 1530 __u32 rx_put, rx_get, new_rx_get, rx_bufsize, rx_bufaddr;
1da177e4 1531
db05c3b1
JS		 1532 rx_get = new_rx_get = readl(&buf_ctrl->rx_get);
1533 rx_put = readl(&buf_ctrl->rx_put);
1534 rx_bufsize = readl(&buf_ctrl->rx_bufsize);
1535 rx_bufaddr = readl(&buf_ctrl->rx_bufaddr);
02f1175c
JS		 1536 if (rx_put >= rx_get)
1537 char_count = rx_put - rx_get;
1538 else
1539 char_count = rx_put - rx_get + rx_bufsize;
1da177e4 1540
02f1175c 1541 if (char_count) {
1da177e4 1542#ifdef CY_ENABLE_MONITORING
02f1175c
JS		 1543 info->mon.int_count++;
1544 info->mon.char_count += char_count;
1545 if (char_count > info->mon.char_max)
1546 info->mon.char_max = char_count;
1547 info->mon.char_last = char_count;
1da177e4 1548#endif
f7429034 1549 if (tty == NULL) {
02f1175c
JS		 1550 /* flush received characters */
1551 new_rx_get = (new_rx_get + char_count) &
1552 (rx_bufsize - 1);
1553 info->rflush_count++;
1554 } else {
1da177e4 1555#ifdef BLOCKMOVE
02f1175c
JS		 1556 /* we'd like to use memcpy(t, f, n) and memset(s, c, count)
1557 for performance, but because of buffer boundaries, there
1558 may be several steps to the operation */
ce71b0ff
JS		 1559 while (1) {
1560 len = tty_prepare_flip_string(tty, &buf,
1561 char_count);
1562 if (!len)
1563 break;
1564
1565 len = min_t(unsigned int, min(len, char_count),
1566 rx_bufsize - new_rx_get);
1567
1568 memcpy_fromio(buf, cinfo->base_addr +
1569 rx_bufaddr + new_rx_get, len);
1570
1571 new_rx_get = (new_rx_get + len) &
02f1175c 1572 (rx_bufsize - 1);
ce71b0ff
JS		 1573 char_count -= len;
1574 info->icount.rx += len;
1575 info->idle_stats.recv_bytes += len;
02f1175c 1576 }
1da177e4 1577#else
02f1175c
JS		 1578 len = tty_buffer_request_room(tty, char_count);
1579 while (len--) {
db05c3b1 1580 data = readb(cinfo->base_addr + rx_bufaddr +
02f1175c
JS		 1581 new_rx_get);
1582 new_rx_get = (new_rx_get + 1)& (rx_bufsize - 1);
1583 tty_insert_flip_char(tty, data, TTY_NORMAL);
1584 info->idle_stats.recv_bytes++;
1585 info->icount.rx++;
1586 }
1da177e4
LT		 1587#endif
1588#ifdef CONFIG_CYZ_INTR
02f1175c
JS		 1589 /* Recalculate the number of chars in the RX buffer and issue
1590 a cmd in case it's higher than the RX high water mark */
db05c3b1 1591 rx_put = readl(&buf_ctrl->rx_put);
02f1175c
JS		 1592 if (rx_put >= rx_get)
1593 char_count = rx_put - rx_get;
1594 else
1595 char_count = rx_put - rx_get + rx_bufsize;
db05c3b1 1596 if (char_count >= (int)readl(&buf_ctrl->rx_threshold)) {
02f1175c
JS		 1597 cy_sched_event(info, Cy_EVENT_Z_RX_FULL);
1598 }
1da177e4 1599#endif
02f1175c
JS		 1600 info->idle_stats.recv_idle = jiffies;
1601 tty_schedule_flip(tty);
1602 }
1603 /* Update rx_get */
1604 cy_writel(&buf_ctrl->rx_get, new_rx_get);
1da177e4 1605 }
1da177e4
LT		 1606}
1607
1608static void
ad39c300
JS		 1609cyz_handle_tx(struct cyclades_port *info, struct CH_CTRL __iomem *ch_ctrl,
1610 struct BUF_CTRL __iomem *buf_ctrl)
1da177e4 1611{
875b206b 1612 struct cyclades_card *cinfo = info->card;
02f1175c
JS		 1613 struct tty_struct *tty = info->tty;
1614 char data;
ad39c300 1615 int char_count;
1da177e4 1616#ifdef BLOCKMOVE
02f1175c 1617 int small_count;
1da177e4 1618#endif
ad39c300 1619 __u32 tx_put, tx_get, tx_bufsize, tx_bufaddr;
1da177e4 1620
02f1175c
JS		 1621 if (info->xmit_cnt <= 0) /* Nothing to transmit */
1622 return;
1da177e4 1623
db05c3b1
JS		 1624 tx_get = readl(&buf_ctrl->tx_get);
1625 tx_put = readl(&buf_ctrl->tx_put);
1626 tx_bufsize = readl(&buf_ctrl->tx_bufsize);
1627 tx_bufaddr = readl(&buf_ctrl->tx_bufaddr);
02f1175c
JS		 1628 if (tx_put >= tx_get)
1629 char_count = tx_get - tx_put - 1 + tx_bufsize;
1630 else
1631 char_count = tx_get - tx_put - 1;
1da177e4 1632
02f1175c 1633 if (char_count) {
1da177e4 1634
f7429034 1635 if (tty == NULL)
02f1175c 1636 goto ztxdone;
1da177e4 1637
02f1175c
JS		 1638 if (info->x_char) { /* send special char */
1639 data = info->x_char;
1da177e4 1640
02f1175c
JS		 1641 cy_writeb(cinfo->base_addr + tx_bufaddr + tx_put, data);
1642 tx_put = (tx_put + 1) & (tx_bufsize - 1);
1643 info->x_char = 0;
1644 char_count--;
1645 info->icount.tx++;
02f1175c 1646 }
1da177e4 1647#ifdef BLOCKMOVE
02f1175c
JS		 1648 while (0 < (small_count = min_t(unsigned int,
1649 tx_bufsize - tx_put, min_t(unsigned int,
1650 (SERIAL_XMIT_SIZE - info->xmit_tail),
1651 min_t(unsigned int, info->xmit_cnt,
1652 char_count))))) {
1653
1654 memcpy_toio((char *)(cinfo->base_addr + tx_bufaddr +
1655 tx_put),
1656 &info->xmit_buf[info->xmit_tail],
1657 small_count);
1658
1659 tx_put = (tx_put + small_count) & (tx_bufsize - 1);
1660 char_count -= small_count;
1661 info->icount.tx += small_count;
1662 info->xmit_cnt -= small_count;
1663 info->xmit_tail = (info->xmit_tail + small_count) &
1664 (SERIAL_XMIT_SIZE - 1);
02f1175c 1665 }
1da177e4 1666#else
02f1175c
JS		 1667 while (info->xmit_cnt && char_count) {
1668 data = info->xmit_buf[info->xmit_tail];
1669 info->xmit_cnt--;
1670 info->xmit_tail = (info->xmit_tail + 1) &
1671 (SERIAL_XMIT_SIZE - 1);
1672
1673 cy_writeb(cinfo->base_addr + tx_bufaddr + tx_put, data);
1674 tx_put = (tx_put + 1) & (tx_bufsize - 1);
1675 char_count--;
1676 info->icount.tx++;
02f1175c 1677 }
1da177e4 1678#endif
02f1175c
JS		 1679ztxdone:
1680 if (info->xmit_cnt < WAKEUP_CHARS) {
1681 cy_sched_event(info, Cy_EVENT_WRITE_WAKEUP);
1682 }
1683 /* Update tx_put */
1684 cy_writel(&buf_ctrl->tx_put, tx_put);
1da177e4 1685 }
1da177e4
LT		 1686}
1687
02f1175c 1688static void cyz_handle_cmd(struct cyclades_card *cinfo)
1da177e4 1689{
02f1175c
JS		 1690 struct tty_struct *tty;
1691 struct cyclades_port *info;
ad39c300
JS		 1692 static struct FIRM_ID __iomem *firm_id;
1693 static struct ZFW_CTRL __iomem *zfw_ctrl;
1694 static struct BOARD_CTRL __iomem *board_ctrl;
1695 static struct CH_CTRL __iomem *ch_ctrl;
1696 static struct BUF_CTRL __iomem *buf_ctrl;
1a86b5e3
KK		 1697 __u32 channel;
1698 __u8 cmd;
1699 __u32 param;
1700 __u32 hw_ver, fw_ver;
02f1175c
JS		 1701 int special_count;
1702 int delta_count;
1703
1704 firm_id = cinfo->base_addr + ID_ADDRESS;
db05c3b1 1705 zfw_ctrl = cinfo->base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
02f1175c 1706 board_ctrl = &zfw_ctrl->board_ctrl;
db05c3b1
JS		 1707 fw_ver = readl(&board_ctrl->fw_version);
1708 hw_ver = readl(&((struct RUNTIME_9060 __iomem *)(cinfo->ctl_addr))->
02f1175c
JS		 1709 mail_box_0);
1710
1711 while (cyz_fetch_msg(cinfo, &channel, &cmd, &param) == 1) {
1712 special_count = 0;
1713 delta_count = 0;
dd025c0c 1714 info = &cinfo->ports[channel];
f7429034 1715 if ((tty = info->tty) == NULL)
02f1175c 1716 continue;
f7429034 1717
02f1175c
JS		 1718 ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]);
1719 buf_ctrl = &(zfw_ctrl->buf_ctrl[channel]);
1720
1721 switch (cmd) {
1722 case C_CM_PR_ERROR:
1723 tty_insert_flip_char(tty, 0, TTY_PARITY);
1724 info->icount.rx++;
1725 special_count++;
1726 break;
1727 case C_CM_FR_ERROR:
1728 tty_insert_flip_char(tty, 0, TTY_FRAME);
1729 info->icount.rx++;
1730 special_count++;
1731 break;
1732 case C_CM_RXBRK:
1733 tty_insert_flip_char(tty, 0, TTY_BREAK);
1734 info->icount.rx++;
1735 special_count++;
1736 break;
1737 case C_CM_MDCD:
1738 info->icount.dcd++;
1739 delta_count++;
1740 if (info->flags & ASYNC_CHECK_CD) {
1741 if ((fw_ver > 241 ? ((u_long) param) :
db05c3b1 1742 readl(&ch_ctrl->rs_status)) &
02f1175c
JS		 1743 C_RS_DCD) {
1744 cy_sched_event(info,
1745 Cy_EVENT_OPEN_WAKEUP);
1746 } else {
1747 cy_sched_event(info, Cy_EVENT_HANGUP);
1748 }
1749 }
1750 break;
1751 case C_CM_MCTS:
1752 info->icount.cts++;
1753 delta_count++;
1754 break;
1755 case C_CM_MRI:
1756 info->icount.rng++;
1757 delta_count++;
1758 break;
1759 case C_CM_MDSR:
1760 info->icount.dsr++;
1761 delta_count++;
1762 break;
1da177e4 1763#ifdef Z_WAKE
02f1175c
JS		 1764 case C_CM_IOCTLW:
1765 cy_sched_event(info, Cy_EVENT_SHUTDOWN_WAKEUP);
1766 break;
1da177e4
LT		 1767#endif
1768#ifdef CONFIG_CYZ_INTR
02f1175c
JS		 1769 case C_CM_RXHIWM:
1770 case C_CM_RXNNDT:
1771 case C_CM_INTBACK2:
1772 /* Reception Interrupt */
1da177e4 1773#ifdef CY_DEBUG_INTERRUPTS
21719191
JS		 1774 printk(KERN_DEBUG "cyz_interrupt: rcvd intr, card %d, "
1775 "port %ld\n", info->card, channel);
1da177e4 1776#endif
02f1175c
JS		 1777 cyz_handle_rx(info, ch_ctrl, buf_ctrl);
1778 break;
1779 case C_CM_TXBEMPTY:
1780 case C_CM_TXLOWWM:
1781 case C_CM_INTBACK:
1782 /* Transmission Interrupt */
1da177e4 1783#ifdef CY_DEBUG_INTERRUPTS
21719191
JS		 1784 printk(KERN_DEBUG "cyz_interrupt: xmit intr, card %d, "
1785 "port %ld\n", info->card, channel);
1da177e4 1786#endif
02f1175c
JS		 1787 cyz_handle_tx(info, ch_ctrl, buf_ctrl);
1788 break;
1789#endif /* CONFIG_CYZ_INTR */
1790 case C_CM_FATAL:
1791 /* should do something with this !!! */
1792 break;
1793 default:
1794 break;
1795 }
1796 if (delta_count)
1797 cy_sched_event(info, Cy_EVENT_DELTA_WAKEUP);
1798 if (special_count)
1799 tty_schedule_flip(tty);
1da177e4 1800 }
1da177e4
LT		 1801}
1802
1803#ifdef CONFIG_CYZ_INTR
02f1175c 1804static irqreturn_t cyz_interrupt(int irq, void *dev_id)
1da177e4 1805{
f7429034 1806 struct cyclades_card *cinfo = dev_id;
1da177e4 1807
f7429034 1808 if (unlikely(cinfo == NULL)) {
1da177e4 1809#ifdef CY_DEBUG_INTERRUPTS
21719191 1810 printk(KERN_DEBUG "cyz_interrupt: spurious interrupt %d\n",irq);
1da177e4 1811#endif
02f1175c
JS		 1812 return IRQ_NONE; /* spurious interrupt */
1813 }
1da177e4 1814
f7429034 1815 if (unlikely(!ISZLOADED(*cinfo))) {
1da177e4 1816#ifdef CY_DEBUG_INTERRUPTS
21719191
JS		 1817 printk(KERN_DEBUG "cyz_interrupt: board not yet loaded "
1818 "(IRQ%d).\n", irq);
1da177e4 1819#endif
02f1175c
JS		 1820 return IRQ_NONE;
1821 }
1da177e4 1822
02f1175c
JS		 1823 /* Handle the interrupts */
1824 cyz_handle_cmd(cinfo);
1da177e4 1825
02f1175c
JS		 1826 return IRQ_HANDLED;
1827} /* cyz_interrupt */
1da177e4 1828
02f1175c 1829static void cyz_rx_restart(unsigned long arg)
1da177e4 1830{
02f1175c 1831 struct cyclades_port *info = (struct cyclades_port *)arg;
875b206b 1832 struct cyclades_card *card = info->card;
02f1175c 1833 int retval;
875b206b 1834 __u32 channel = info->line - card->first_line;
02f1175c
JS		 1835 unsigned long flags;
1836
9fa1b3b1 1837 spin_lock_irqsave(&card->card_lock, flags);
875b206b 1838 retval = cyz_issue_cmd(card, channel, C_CM_INTBACK2, 0L);
02f1175c 1839 if (retval != 0) {
21719191 1840 printk(KERN_ERR "cyc:cyz_rx_restart retval on ttyC%d was %x\n",
02f1175c
JS		 1841 info->line, retval);
1842 }
9fa1b3b1 1843 spin_unlock_irqrestore(&card->card_lock, flags);
1da177e4
LT		 1844}
1845
02f1175c 1846#else /* CONFIG_CYZ_INTR */
1da177e4 1847
02f1175c 1848static void cyz_poll(unsigned long arg)
1da177e4 1849{
02f1175c
JS		 1850 struct cyclades_card *cinfo;
1851 struct cyclades_port *info;
1852 struct tty_struct *tty;
ad39c300
JS		 1853 static struct FIRM_ID *firm_id;
1854 static struct ZFW_CTRL *zfw_ctrl;
1855 static struct BOARD_CTRL *board_ctrl;
1856 static struct CH_CTRL *ch_ctrl;
1857 static struct BUF_CTRL *buf_ctrl;
b7050906 1858 unsigned long expires = jiffies + HZ;
02f1175c 1859 int card, port;
1da177e4 1860
02f1175c
JS		 1861 for (card = 0; card < NR_CARDS; card++) {
1862 cinfo = &cy_card[card];
1863
1864 if (!IS_CYC_Z(*cinfo))
1865 continue;
1866 if (!ISZLOADED(*cinfo))
1867 continue;
1868
1869 firm_id = cinfo->base_addr + ID_ADDRESS;
1870 zfw_ctrl = cinfo->base_addr +
db05c3b1 1871 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
02f1175c 1872 board_ctrl = &(zfw_ctrl->board_ctrl);
1da177e4
LT		 1873
1874 /* Skip first polling cycle to avoid racing conditions with the FW */
02f1175c 1875 if (!cinfo->intr_enabled) {
db05c3b1 1876 cinfo->nports = (int)readl(&board_ctrl->n_channel);
02f1175c
JS		 1877 cinfo->intr_enabled = 1;
1878 continue;
1879 }
1da177e4 1880
02f1175c 1881 cyz_handle_cmd(cinfo);
1da177e4 1882
02f1175c 1883 for (port = 0; port < cinfo->nports; port++) {
dd025c0c 1884 info = &cinfo->ports[port];
02f1175c
JS		 1885 tty = info->tty;
1886 ch_ctrl = &(zfw_ctrl->ch_ctrl[port]);
1887 buf_ctrl = &(zfw_ctrl->buf_ctrl[port]);
1da177e4 1888
02f1175c
JS		 1889 if (!info->throttle)
1890 cyz_handle_rx(info, ch_ctrl, buf_ctrl);
1891 cyz_handle_tx(info, ch_ctrl, buf_ctrl);
1892 }
1893 /* poll every 'cyz_polling_cycle' period */
b7050906 1894 expires = jiffies + cyz_polling_cycle;
1da177e4 1895 }
b7050906 1896 mod_timer(&cyz_timerlist, expires);
02f1175c 1897} /* cyz_poll */
1da177e4 1898
02f1175c 1899#endif /* CONFIG_CYZ_INTR */
1da177e4
LT		 1900
1901/********** End of block of Cyclades-Z specific code *********/
1902/***********************************************************/
1903
1da177e4
LT		 1904/* This is called whenever a port becomes active;
1905 interrupts are enabled and DTR & RTS are turned on.
1906 */
02f1175c 1907static int startup(struct cyclades_port *info)
1da177e4 1908{
875b206b 1909 struct cyclades_card *card;
02f1175c
JS		 1910 unsigned long flags;
1911 int retval = 0;
1912 void __iomem *base_addr;
875b206b 1913 int chip, channel, index;
02f1175c 1914 unsigned long page;
1da177e4 1915
02f1175c 1916 card = info->card;
875b206b 1917 channel = info->line - card->first_line;
1da177e4 1918
02f1175c
JS		 1919 page = get_zeroed_page(GFP_KERNEL);
1920 if (!page)
1921 return -ENOMEM;
1da177e4 1922
9fa1b3b1 1923 spin_lock_irqsave(&card->card_lock, flags);
1da177e4 1924
02f1175c
JS		 1925 if (info->flags & ASYNC_INITIALIZED) {
1926 free_page(page);
1927 goto errout;
1928 }
1da177e4 1929
02f1175c
JS		 1930 if (!info->type) {
1931 if (info->tty) {
1932 set_bit(TTY_IO_ERROR, &info->tty->flags);
1933 }
1934 free_page(page);
1935 goto errout;
1936 }
1da177e4 1937
02f1175c
JS		 1938 if (info->xmit_buf)
1939 free_page(page);
1940 else
1941 info->xmit_buf = (unsigned char *)page;
1da177e4 1942
9fa1b3b1 1943 spin_unlock_irqrestore(&card->card_lock, flags);
1da177e4 1944
02f1175c 1945 set_line_char(info);
1da177e4 1946
875b206b 1947 if (!IS_CYC_Z(*card)) {
02f1175c
JS		 1948 chip = channel >> 2;
1949 channel &= 0x03;
875b206b
JS		 1950 index = card->bus_index;
1951 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
1da177e4
LT		 1952
1953#ifdef CY_DEBUG_OPEN
21719191
JS		 1954 printk(KERN_DEBUG "cyc startup card %d, chip %d, channel %d, "
1955 "base_addr %p\n",
1956 card, chip, channel, base_addr);
1da177e4 1957#endif
9fa1b3b1 1958 spin_lock_irqsave(&card->card_lock, flags);
1da177e4 1959
02f1175c 1960 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
1da177e4 1961
02f1175c
JS		 1962 cy_writeb(base_addr + (CyRTPR << index),
1963 (info->default_timeout ? info->default_timeout : 0x02));
1964 /* 10ms rx timeout */
1da177e4 1965
02f1175c
JS		 1966 cyy_issue_cmd(base_addr, CyCHAN_CTL | CyENB_RCVR | CyENB_XMTR,
1967 index);
1da177e4 1968
02f1175c
JS		 1969 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
1970 cy_writeb(base_addr + (CyMSVR1 << index), CyRTS);
1971 cy_writeb(base_addr + (CyMSVR2 << index), CyDTR);
1da177e4
LT		 1972
1973#ifdef CY_DEBUG_DTR
21719191
JS		 1974 printk(KERN_DEBUG "cyc:startup raising DTR\n");
1975 printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
db05c3b1
JS		 1976 readb(base_addr + (CyMSVR1 << index)),
1977 readb(base_addr + (CyMSVR2 << index)));
1da177e4
LT		 1978#endif
1979
02f1175c 1980 cy_writeb(base_addr + (CySRER << index),
db05c3b1 1981 readb(base_addr + (CySRER << index)) | CyRxData);
02f1175c 1982 info->flags |= ASYNC_INITIALIZED;
1da177e4 1983
02f1175c
JS		 1984 if (info->tty) {
1985 clear_bit(TTY_IO_ERROR, &info->tty->flags);
1986 }
1987 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
1988 info->breakon = info->breakoff = 0;
1989 memset((char *)&info->idle_stats, 0, sizeof(info->idle_stats));
1990 info->idle_stats.in_use =
1991 info->idle_stats.recv_idle =
1992 info->idle_stats.xmit_idle = jiffies;
1da177e4 1993
9fa1b3b1 1994 spin_unlock_irqrestore(&card->card_lock, flags);
1da177e4 1995
02f1175c
JS		 1996 } else {
1997 struct FIRM_ID __iomem *firm_id;
1998 struct ZFW_CTRL __iomem *zfw_ctrl;
1999 struct BOARD_CTRL __iomem *board_ctrl;
2000 struct CH_CTRL __iomem *ch_ctrl;
2001 int retval;
1da177e4 2002
875b206b 2003 base_addr = card->base_addr;
1da177e4 2004
02f1175c 2005 firm_id = base_addr + ID_ADDRESS;
875b206b 2006 if (!ISZLOADED(*card)) {
02f1175c
JS		 2007 return -ENODEV;
2008 }
1da177e4 2009
875b206b 2010 zfw_ctrl = card->base_addr +
db05c3b1 2011 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
02f1175c
JS		 2012 board_ctrl = &zfw_ctrl->board_ctrl;
2013 ch_ctrl = zfw_ctrl->ch_ctrl;
1da177e4
LT		 2014
2015#ifdef CY_DEBUG_OPEN
21719191
JS		 2016 printk(KERN_DEBUG "cyc startup Z card %d, channel %d, "
2017 "base_addr %p\n", card, channel, base_addr);
1da177e4 2018#endif
9fa1b3b1 2019 spin_lock_irqsave(&card->card_lock, flags);
1da177e4 2020
02f1175c 2021 cy_writel(&ch_ctrl[channel].op_mode, C_CH_ENABLE);
1da177e4
LT		 2022#ifdef Z_WAKE
2023#ifdef CONFIG_CYZ_INTR
02f1175c
JS		 2024 cy_writel(&ch_ctrl[channel].intr_enable,
2025 C_IN_TXBEMPTY | C_IN_TXLOWWM | C_IN_RXHIWM |
2026 C_IN_RXNNDT | C_IN_IOCTLW | C_IN_MDCD);
1da177e4 2027#else
02f1175c
JS		 2028 cy_writel(&ch_ctrl[channel].intr_enable,
2029 C_IN_IOCTLW | C_IN_MDCD);
2030#endif /* CONFIG_CYZ_INTR */
1da177e4
LT		 2031#else
2032#ifdef CONFIG_CYZ_INTR
02f1175c
JS		 2033 cy_writel(&ch_ctrl[channel].intr_enable,
2034 C_IN_TXBEMPTY | C_IN_TXLOWWM | C_IN_RXHIWM |
2035 C_IN_RXNNDT | C_IN_MDCD);
1da177e4 2036#else
02f1175c
JS		 2037 cy_writel(&ch_ctrl[channel].intr_enable, C_IN_MDCD);
2038#endif /* CONFIG_CYZ_INTR */
2039#endif /* Z_WAKE */
2040
875b206b 2041 retval = cyz_issue_cmd(card, channel, C_CM_IOCTL, 0L);
02f1175c 2042 if (retval != 0) {
21719191
JS		 2043 printk(KERN_ERR "cyc:startup(1) retval on ttyC%d was "
2044 "%x\n", info->line, retval);
02f1175c 2045 }
1da177e4 2046
02f1175c 2047 /* Flush RX buffers before raising DTR and RTS */
875b206b 2048 retval = cyz_issue_cmd(card, channel, C_CM_FLUSH_RX, 0L);
02f1175c 2049 if (retval != 0) {
21719191
JS		 2050 printk(KERN_ERR "cyc:startup(2) retval on ttyC%d was "
2051 "%x\n", info->line, retval);
02f1175c 2052 }
1da177e4 2053
02f1175c
JS		 2054 /* set timeout !!! */
2055 /* set RTS and DTR !!! */
2056 cy_writel(&ch_ctrl[channel].rs_control,
db05c3b1 2057 readl(&ch_ctrl[channel].rs_control) | C_RS_RTS |
02f1175c 2058 C_RS_DTR);
9fa1b3b1 2059 retval = cyz_issue_cmd(card, channel, C_CM_IOCTLM, 0L);
02f1175c 2060 if (retval != 0) {
21719191
JS		 2061 printk(KERN_ERR "cyc:startup(3) retval on ttyC%d was "
2062 "%x\n", info->line, retval);
02f1175c 2063 }
1da177e4 2064#ifdef CY_DEBUG_DTR
21719191 2065 printk(KERN_DEBUG "cyc:startup raising Z DTR\n");
1da177e4
LT		 2066#endif
2067
02f1175c
JS		 2068 /* enable send, recv, modem !!! */
2069
2070 info->flags |= ASYNC_INITIALIZED;
2071 if (info->tty) {
2072 clear_bit(TTY_IO_ERROR, &info->tty->flags);
2073 }
2074 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
2075 info->breakon = info->breakoff = 0;
2076 memset((char *)&info->idle_stats, 0, sizeof(info->idle_stats));
2077 info->idle_stats.in_use =
2078 info->idle_stats.recv_idle =
2079 info->idle_stats.xmit_idle = jiffies;
1da177e4 2080
9fa1b3b1 2081 spin_unlock_irqrestore(&card->card_lock, flags);
1da177e4 2082 }
1da177e4
LT		 2083
2084#ifdef CY_DEBUG_OPEN
21719191 2085 printk(KERN_DEBUG "cyc startup done\n");
1da177e4
LT		 2086#endif
2087 return 0;
2088
2089errout:
9fa1b3b1 2090 spin_unlock_irqrestore(&card->card_lock, flags);
1da177e4 2091 return retval;
02f1175c 2092} /* startup */
1da177e4 2093
02f1175c 2094static void start_xmit(struct cyclades_port *info)
1da177e4 2095{
875b206b 2096 struct cyclades_card *card;
02f1175c
JS		 2097 unsigned long flags;
2098 void __iomem *base_addr;
875b206b 2099 int chip, channel, index;
1da177e4 2100
02f1175c 2101 card = info->card;
875b206b
JS		 2102 channel = info->line - card->first_line;
2103 if (!IS_CYC_Z(*card)) {
02f1175c
JS		 2104 chip = channel >> 2;
2105 channel &= 0x03;
875b206b
JS		 2106 index = card->bus_index;
2107 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
02f1175c 2108
9fa1b3b1 2109 spin_lock_irqsave(&card->card_lock, flags);
02f1175c
JS		 2110 cy_writeb(base_addr + (CyCAR << index), channel);
2111 cy_writeb(base_addr + (CySRER << index),
db05c3b1 2112 readb(base_addr + (CySRER << index)) | CyTxRdy);
9fa1b3b1 2113 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c 2114 } else {
1da177e4 2115#ifdef CONFIG_CYZ_INTR
02f1175c 2116 int retval;
1da177e4 2117
9fa1b3b1 2118 spin_lock_irqsave(&card->card_lock, flags);
875b206b 2119 retval = cyz_issue_cmd(card, channel, C_CM_INTBACK, 0L);
02f1175c 2120 if (retval != 0) {
21719191
JS		 2121 printk(KERN_ERR "cyc:start_xmit retval on ttyC%d was "
2122 "%x\n", info->line, retval);
02f1175c 2123 }
9fa1b3b1 2124 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c
JS		 2125#else /* CONFIG_CYZ_INTR */
2126 /* Don't have to do anything at this time */
2127#endif /* CONFIG_CYZ_INTR */
2128 }
2129} /* start_xmit */
1da177e4
LT		 2130
2131/*
2132 * This routine shuts down a serial port; interrupts are disabled,
2133 * and DTR is dropped if the hangup on close termio flag is on.
2134 */
02f1175c 2135static void shutdown(struct cyclades_port *info)
1da177e4 2136{
875b206b 2137 struct cyclades_card *card;
02f1175c
JS		 2138 unsigned long flags;
2139 void __iomem *base_addr;
875b206b 2140 int chip, channel, index;
02f1175c
JS		 2141
2142 if (!(info->flags & ASYNC_INITIALIZED)) {
2143 return;
2144 }
2145
2146 card = info->card;
875b206b
JS		 2147 channel = info->line - card->first_line;
2148 if (!IS_CYC_Z(*card)) {
02f1175c
JS		 2149 chip = channel >> 2;
2150 channel &= 0x03;
875b206b
JS		 2151 index = card->bus_index;
2152 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
1da177e4
LT		 2153
2154#ifdef CY_DEBUG_OPEN
21719191
JS		 2155 printk(KERN_DEBUG "cyc shutdown Y card %d, chip %d, "
2156 "channel %d, base_addr %p\n",
2157 card, chip, channel, base_addr);
1da177e4
LT		 2158#endif
2159
9fa1b3b1 2160 spin_lock_irqsave(&card->card_lock, flags);
02f1175c
JS		 2161
2162 /* Clear delta_msr_wait queue to avoid mem leaks. */
2163 wake_up_interruptible(&info->delta_msr_wait);
1da177e4 2164
02f1175c
JS		 2165 if (info->xmit_buf) {
2166 unsigned char *temp;
2167 temp = info->xmit_buf;
2168 info->xmit_buf = NULL;
2169 free_page((unsigned long)temp);
2170 }
2171 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
2172 if (!info->tty || (info->tty->termios->c_cflag & HUPCL)) {
2173 cy_writeb(base_addr + (CyMSVR1 << index), ~CyRTS);
2174 cy_writeb(base_addr + (CyMSVR2 << index), ~CyDTR);
1da177e4 2175#ifdef CY_DEBUG_DTR
21719191
JS		 2176 printk(KERN_DEBUG "cyc shutdown dropping DTR\n");
2177 printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
db05c3b1
JS		 2178 readb(base_addr + (CyMSVR1 << index)),
2179 readb(base_addr + (CyMSVR2 << index)));
1da177e4 2180#endif
02f1175c
JS		 2181 }
2182 cyy_issue_cmd(base_addr, CyCHAN_CTL | CyDIS_RCVR, index);
2183 /* it may be appropriate to clear _XMIT at
2184 some later date (after testing)!!! */
2185
2186 if (info->tty) {
2187 set_bit(TTY_IO_ERROR, &info->tty->flags);
2188 }
2189 info->flags &= ~ASYNC_INITIALIZED;
9fa1b3b1 2190 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c
JS		 2191 } else {
2192 struct FIRM_ID __iomem *firm_id;
2193 struct ZFW_CTRL __iomem *zfw_ctrl;
2194 struct BOARD_CTRL __iomem *board_ctrl;
2195 struct CH_CTRL __iomem *ch_ctrl;
2196 int retval;
2197
875b206b 2198 base_addr = card->base_addr;
1da177e4 2199#ifdef CY_DEBUG_OPEN
21719191
JS		 2200 printk(KERN_DEBUG "cyc shutdown Z card %d, channel %d, "
2201 "base_addr %p\n", card, channel, base_addr);
1da177e4
LT		 2202#endif
2203
02f1175c 2204 firm_id = base_addr + ID_ADDRESS;
875b206b 2205 if (!ISZLOADED(*card)) {
02f1175c
JS		 2206 return;
2207 }
1da177e4 2208
875b206b 2209 zfw_ctrl = card->base_addr +
db05c3b1 2210 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
02f1175c
JS		 2211 board_ctrl = &zfw_ctrl->board_ctrl;
2212 ch_ctrl = zfw_ctrl->ch_ctrl;
1da177e4 2213
9fa1b3b1 2214 spin_lock_irqsave(&card->card_lock, flags);
1da177e4 2215
02f1175c
JS		 2216 if (info->xmit_buf) {
2217 unsigned char *temp;
2218 temp = info->xmit_buf;
2219 info->xmit_buf = NULL;
2220 free_page((unsigned long)temp);
1da177e4 2221 }
02f1175c
JS		 2222
2223 if (!info->tty || (info->tty->termios->c_cflag & HUPCL)) {
2224 cy_writel(&ch_ctrl[channel].rs_control,
db05c3b1 2225 (__u32)(readl(&ch_ctrl[channel].rs_control) &
02f1175c 2226 ~(C_RS_RTS | C_RS_DTR)));
875b206b 2227 retval = cyz_issue_cmd(info->card, channel,
02f1175c
JS		 2228 C_CM_IOCTLM, 0L);
2229 if (retval != 0) {
21719191
JS		 2230 printk(KERN_ERR"cyc:shutdown retval on ttyC%d "
2231 "was %x\n", info->line, retval);
02f1175c 2232 }
1da177e4 2233#ifdef CY_DEBUG_DTR
21719191 2234 printk(KERN_DEBUG "cyc:shutdown dropping Z DTR\n");
1da177e4 2235#endif
02f1175c 2236 }
1da177e4 2237
02f1175c
JS		 2238 if (info->tty) {
2239 set_bit(TTY_IO_ERROR, &info->tty->flags);
2240 }
2241 info->flags &= ~ASYNC_INITIALIZED;
2242
9fa1b3b1 2243 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c 2244 }
1da177e4
LT		 2245
2246#ifdef CY_DEBUG_OPEN
21719191 2247 printk(KERN_DEBUG "cyc shutdown done\n");
1da177e4 2248#endif
02f1175c 2249} /* shutdown */
1da177e4
LT		 2250
2251/*
2252 * ------------------------------------------------------------
2253 * cy_open() and friends
2254 * ------------------------------------------------------------
2255 */
2256
2257static int
02f1175c
JS		 2258block_til_ready(struct tty_struct *tty, struct file *filp,
2259 struct cyclades_port *info)
1da177e4 2260{
02f1175c
JS		 2261 DECLARE_WAITQUEUE(wait, current);
2262 struct cyclades_card *cinfo;
2263 unsigned long flags;
2264 int chip, channel, index;
2265 int retval;
2266 void __iomem *base_addr;
2267
875b206b 2268 cinfo = info->card;
02f1175c
JS		 2269 channel = info->line - cinfo->first_line;
2270
2271 /*
2272 * If the device is in the middle of being closed, then block
2273 * until it's done, and then try again.
2274 */
2275 if (tty_hung_up_p(filp) || (info->flags & ASYNC_CLOSING)) {
2c7fea99
JS		 2276 wait_event_interruptible(info->close_wait,
2277 !(info->flags & ASYNC_CLOSING));
096dcfce 2278 return (info->flags & ASYNC_HUP_NOTIFY) ? -EAGAIN: -ERESTARTSYS;
1da177e4 2279 }
02f1175c
JS		 2280
2281 /*
2282 * If non-blocking mode is set, then make the check up front
2283 * and then exit.
2284 */
2285 if ((filp->f_flags & O_NONBLOCK) || (tty->flags & (1 << TTY_IO_ERROR))) {
2286 info->flags |= ASYNC_NORMAL_ACTIVE;
2287 return 0;
2288 }
2289
2290 /*
2291 * Block waiting for the carrier detect and the line to become
2292 * free (i.e., not in use by the callout). While we are in
2293 * this loop, info->count is dropped by one, so that
2294 * cy_close() knows when to free things. We restore it upon
2295 * exit, either normal or abnormal.
2296 */
2297 retval = 0;
2298 add_wait_queue(&info->open_wait, &wait);
1da177e4 2299#ifdef CY_DEBUG_OPEN
21719191
JS		 2300 printk(KERN_DEBUG "cyc block_til_ready before block: ttyC%d, "
2301 "count = %d\n", info->line, info->count);
1da177e4 2302#endif
9fa1b3b1 2303 spin_lock_irqsave(&cinfo->card_lock, flags);
02f1175c
JS		 2304 if (!tty_hung_up_p(filp))
2305 info->count--;
9fa1b3b1 2306 spin_unlock_irqrestore(&cinfo->card_lock, flags);
1da177e4 2307#ifdef CY_DEBUG_COUNT
21719191
JS		 2308 printk(KERN_DEBUG "cyc block_til_ready: (%d): decrementing count to "
2309 "%d\n", current->pid, info->count);
1da177e4 2310#endif
02f1175c
JS		 2311 info->blocked_open++;
2312
2313 if (!IS_CYC_Z(*cinfo)) {
2314 chip = channel >> 2;
2315 channel &= 0x03;
2316 index = cinfo->bus_index;
2317 base_addr = cinfo->base_addr + (cy_chip_offset[chip] << index);
2318
2319 while (1) {
9fa1b3b1 2320 spin_lock_irqsave(&cinfo->card_lock, flags);
02f1175c
JS		 2321 if ((tty->termios->c_cflag & CBAUD)) {
2322 cy_writeb(base_addr + (CyCAR << index),
2323 (u_char) channel);
2324 cy_writeb(base_addr + (CyMSVR1 << index),
2325 CyRTS);
2326 cy_writeb(base_addr + (CyMSVR2 << index),
2327 CyDTR);
1da177e4 2328#ifdef CY_DEBUG_DTR
21719191
JS		 2329 printk(KERN_DEBUG "cyc:block_til_ready raising "
2330 "DTR\n");
2331 printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
db05c3b1
JS		 2332 readb(base_addr + (CyMSVR1 << index)),
2333 readb(base_addr + (CyMSVR2 << index)));
1da177e4 2334#endif
02f1175c 2335 }
9fa1b3b1 2336 spin_unlock_irqrestore(&cinfo->card_lock, flags);
1da177e4 2337
02f1175c
JS		 2338 set_current_state(TASK_INTERRUPTIBLE);
2339 if (tty_hung_up_p(filp) ||
2340 !(info->flags & ASYNC_INITIALIZED)) {
2341 retval = ((info->flags & ASYNC_HUP_NOTIFY) ?
2342 -EAGAIN : -ERESTARTSYS);
2343 break;
2344 }
1da177e4 2345
9fa1b3b1 2346 spin_lock_irqsave(&cinfo->card_lock, flags);
02f1175c
JS		 2347 cy_writeb(base_addr + (CyCAR << index),
2348 (u_char) channel);
2349 if (!(info->flags & ASYNC_CLOSING) && (C_CLOCAL(tty) ||
db05c3b1 2350 (readb(base_addr +
02f1175c 2351 (CyMSVR1 << index)) & CyDCD))) {
9fa1b3b1 2352 spin_unlock_irqrestore(&cinfo->card_lock, flags);
02f1175c
JS		 2353 break;
2354 }
9fa1b3b1 2355 spin_unlock_irqrestore(&cinfo->card_lock, flags);
1da177e4 2356
02f1175c
JS		 2357 if (signal_pending(current)) {
2358 retval = -ERESTARTSYS;
2359 break;
2360 }
1da177e4 2361#ifdef CY_DEBUG_OPEN
21719191
JS		 2362 printk(KERN_DEBUG "cyc block_til_ready blocking: "
2363 "ttyC%d, count = %d\n",
2364 info->line, info->count);
1da177e4 2365#endif
02f1175c 2366 schedule();
1da177e4 2367 }
02f1175c
JS		 2368 } else {
2369 struct FIRM_ID __iomem *firm_id;
2370 struct ZFW_CTRL __iomem *zfw_ctrl;
2371 struct BOARD_CTRL __iomem *board_ctrl;
2372 struct CH_CTRL __iomem *ch_ctrl;
2373 int retval;
2374
2375 base_addr = cinfo->base_addr;
2376 firm_id = base_addr + ID_ADDRESS;
2377 if (!ISZLOADED(*cinfo)) {
cc0a8fbb 2378 __set_current_state(TASK_RUNNING);
02f1175c
JS		 2379 remove_wait_queue(&info->open_wait, &wait);
2380 return -EINVAL;
2381 }
2382
db05c3b1 2383 zfw_ctrl = base_addr + (readl(&firm_id->zfwctrl_addr)& 0xfffff);
02f1175c
JS		 2384 board_ctrl = &zfw_ctrl->board_ctrl;
2385 ch_ctrl = zfw_ctrl->ch_ctrl;
2386
2387 while (1) {
2388 if ((tty->termios->c_cflag & CBAUD)) {
2389 cy_writel(&ch_ctrl[channel].rs_control,
db05c3b1
JS		 2390 readl(&ch_ctrl[channel].rs_control) |
2391 C_RS_RTS | C_RS_DTR);
9fa1b3b1 2392 retval = cyz_issue_cmd(cinfo,
db05c3b1 2393 channel, C_CM_IOCTLM, 0L);
02f1175c 2394 if (retval != 0) {
21719191
JS		 2395 printk(KERN_ERR "cyc:block_til_ready "
2396 "retval on ttyC%d was %x\n",
02f1175c
JS		 2397 info->line, retval);
2398 }
1da177e4 2399#ifdef CY_DEBUG_DTR
21719191
JS		 2400 printk(KERN_DEBUG "cyc:block_til_ready raising "
2401 "Z DTR\n");
1da177e4 2402#endif
02f1175c 2403 }
1da177e4 2404
02f1175c
JS		 2405 set_current_state(TASK_INTERRUPTIBLE);
2406 if (tty_hung_up_p(filp) ||
2407 !(info->flags & ASYNC_INITIALIZED)) {
2408 retval = ((info->flags & ASYNC_HUP_NOTIFY) ?
2409 -EAGAIN : -ERESTARTSYS);
2410 break;
2411 }
2412 if (!(info->flags & ASYNC_CLOSING) && (C_CLOCAL(tty) ||
db05c3b1 2413 (readl(&ch_ctrl[channel].rs_status) &
02f1175c
JS		 2414 C_RS_DCD))) {
2415 break;
2416 }
2417 if (signal_pending(current)) {
2418 retval = -ERESTARTSYS;
2419 break;
2420 }
1da177e4 2421#ifdef CY_DEBUG_OPEN
21719191
JS		 2422 printk(KERN_DEBUG "cyc block_til_ready blocking: "
2423 "ttyC%d, count = %d\n",
2424 info->line, info->count);
1da177e4 2425#endif
02f1175c
JS		 2426 schedule();
2427 }
1da177e4 2428 }
cc0a8fbb 2429 __set_current_state(TASK_RUNNING);
02f1175c
JS		 2430 remove_wait_queue(&info->open_wait, &wait);
2431 if (!tty_hung_up_p(filp)) {
2432 info->count++;
1da177e4 2433#ifdef CY_DEBUG_COUNT
21719191
JS		 2434 printk(KERN_DEBUG "cyc:block_til_ready (%d): incrementing "
2435 "count to %d\n", current->pid, info->count);
1da177e4 2436#endif
02f1175c
JS		 2437 }
2438 info->blocked_open--;
1da177e4 2439#ifdef CY_DEBUG_OPEN
21719191
JS		 2440 printk(KERN_DEBUG "cyc:block_til_ready after blocking: ttyC%d, "
2441 "count = %d\n", info->line, info->count);
1da177e4 2442#endif
02f1175c
JS		 2443 if (retval)
2444 return retval;
2445 info->flags |= ASYNC_NORMAL_ACTIVE;
2446 return 0;
2447} /* block_til_ready */
1da177e4
LT		 2448
2449/*
2450 * This routine is called whenever a serial port is opened. It
2451 * performs the serial-specific initialization for the tty structure.
2452 */
02f1175c 2453static int cy_open(struct tty_struct *tty, struct file *filp)
1da177e4 2454{
02f1175c 2455 struct cyclades_port *info;
dd025c0c 2456 unsigned int i;
02f1175c 2457 int retval, line;
1da177e4 2458
02f1175c
JS		 2459 line = tty->index;
2460 if ((line < 0) || (NR_PORTS <= line)) {
2461 return -ENODEV;
2462 }
dd025c0c
JS		 2463 for (i = 0; i < NR_CARDS; i++)
2464 if (line < cy_card[i].first_line + cy_card[i].nports &&
2465 line >= cy_card[i].first_line)
2466 break;
2467 if (i >= NR_CARDS)
2468 return -ENODEV;
2469 info = &cy_card[i].ports[line - cy_card[i].first_line];
02f1175c
JS		 2470 if (info->line < 0) {
2471 return -ENODEV;
2472 }
1da177e4 2473
02f1175c
JS		 2474 /* If the card's firmware hasn't been loaded,
2475 treat it as absent from the system. This
2476 will make the user pay attention.
2477 */
875b206b
JS		 2478 if (IS_CYC_Z(*info->card)) {
2479 struct cyclades_card *cinfo = info->card;
02f1175c
JS		 2480 struct FIRM_ID __iomem *firm_id = cinfo->base_addr + ID_ADDRESS;
2481
2482 if (!ISZLOADED(*cinfo)) {
db05c3b1 2483 if (((ZE_V1 == readl(&((struct RUNTIME_9060 __iomem *)
02f1175c
JS		 2484 (cinfo->ctl_addr))->mail_box_0)) &&
2485 Z_FPGA_CHECK(*cinfo)) &&
db05c3b1 2486 (ZFIRM_HLT == readl(
02f1175c 2487 &firm_id->signature))) {
21719191
JS		 2488 printk(KERN_ERR "cyc:Cyclades-Z Error: you "
2489 "need an external power supply for "
2490 "this number of ports.\nFirmware "
2491 "halted.\n");
02f1175c 2492 } else {
21719191
JS		 2493 printk(KERN_ERR "cyc:Cyclades-Z firmware not "
2494 "yet loaded\n");
02f1175c
JS		 2495 }
2496 return -ENODEV;
2497 }
2498#ifdef CONFIG_CYZ_INTR
2499 else {
2500 /* In case this Z board is operating in interrupt mode, its
2501 interrupts should be enabled as soon as the first open
2502 happens to one of its ports. */
2503 if (!cinfo->intr_enabled) {
2504 struct ZFW_CTRL __iomem *zfw_ctrl;
2505 struct BOARD_CTRL __iomem *board_ctrl;
2506
2507 zfw_ctrl = cinfo->base_addr +
db05c3b1
JS		 2508 (readl(&firm_id->zfwctrl_addr) &
2509 0xfffff);
02f1175c
JS		 2510
2511 board_ctrl = &zfw_ctrl->board_ctrl;
2512
2513 /* Enable interrupts on the PLX chip */
2514 cy_writew(cinfo->ctl_addr + 0x68,
db05c3b1 2515 readw(cinfo->ctl_addr + 0x68) | 0x0900);
02f1175c
JS		 2516 /* Enable interrupts on the FW */
2517 retval = cyz_issue_cmd(cinfo, 0,
2518 C_CM_IRQ_ENBL, 0L);
2519 if (retval != 0) {
21719191
JS		 2520 printk(KERN_ERR "cyc:IRQ enable retval "
2521 "was %x\n", retval);
02f1175c
JS		 2522 }
2523 cinfo->nports =
db05c3b1 2524 (int)readl(&board_ctrl->n_channel);
02f1175c
JS		 2525 cinfo->intr_enabled = 1;
2526 }
1da177e4 2527 }
02f1175c
JS		 2528#endif /* CONFIG_CYZ_INTR */
2529 /* Make sure this Z port really exists in hardware */
2530 if (info->line > (cinfo->first_line + cinfo->nports - 1))
2531 return -ENODEV;
1da177e4 2532 }
1da177e4 2533#ifdef CY_DEBUG_OTHER
21719191 2534 printk(KERN_DEBUG "cyc:cy_open ttyC%d\n", info->line);
1da177e4 2535#endif
02f1175c
JS		 2536 tty->driver_data = info;
2537 info->tty = tty;
2538 if (serial_paranoia_check(info, tty->name, "cy_open")) {
2539 return -ENODEV;
2540 }
1da177e4 2541#ifdef CY_DEBUG_OPEN
21719191
JS		 2542 printk(KERN_DEBUG "cyc:cy_open ttyC%d, count = %d\n", info->line,
2543 info->count);
1da177e4 2544#endif
02f1175c 2545 info->count++;
1da177e4 2546#ifdef CY_DEBUG_COUNT
21719191 2547 printk(KERN_DEBUG "cyc:cy_open (%d): incrementing count to %d\n",
02f1175c 2548 current->pid, info->count);
1da177e4 2549#endif
1da177e4 2550
02f1175c
JS		 2551 /*
2552 * If the port is the middle of closing, bail out now
2553 */
2554 if (tty_hung_up_p(filp) || (info->flags & ASYNC_CLOSING)) {
2c7fea99
JS		 2555 wait_event_interruptible(info->close_wait,
2556 !(info->flags & ASYNC_CLOSING));
096dcfce 2557 return (info->flags & ASYNC_HUP_NOTIFY) ? -EAGAIN: -ERESTARTSYS;
02f1175c 2558 }
1da177e4 2559
02f1175c
JS		 2560 /*
2561 * Start up serial port
2562 */
2563 retval = startup(info);
2564 if (retval) {
2565 return retval;
2566 }
1da177e4 2567
02f1175c
JS		 2568 retval = block_til_ready(tty, filp, info);
2569 if (retval) {
1da177e4 2570#ifdef CY_DEBUG_OPEN
21719191
JS		 2571 printk(KERN_DEBUG "cyc:cy_open returning after block_til_ready "
2572 "with %d\n", retval);
1da177e4 2573#endif
02f1175c
JS		 2574 return retval;
2575 }
1da177e4 2576
02f1175c 2577 info->throttle = 0;
1da177e4 2578
02f1175c 2579#ifdef CY_DEBUG_OPEN
21719191 2580 printk(KERN_DEBUG "cyc:cy_open done\n");
02f1175c
JS		 2581#endif
2582 return 0;
2583} /* cy_open */
1da177e4
LT		 2584
2585/*
2586 * cy_wait_until_sent() --- wait until the transmitter is empty
2587 */
02f1175c 2588static void cy_wait_until_sent(struct tty_struct *tty, int timeout)
1da177e4 2589{
875b206b 2590 struct cyclades_card *card;
cab9bdd1 2591 struct cyclades_port *info = tty->driver_data;
02f1175c 2592 void __iomem *base_addr;
875b206b 2593 int chip, channel, index;
02f1175c
JS		 2594 unsigned long orig_jiffies;
2595 int char_time;
2596
2597 if (serial_paranoia_check(info, tty->name, "cy_wait_until_sent"))
2598 return;
2599
2600 if (info->xmit_fifo_size == 0)
2601 return; /* Just in case.... */
1da177e4 2602
02f1175c
JS		 2603 orig_jiffies = jiffies;
2604 /*
2605 * Set the check interval to be 1/5 of the estimated time to
2606 * send a single character, and make it at least 1. The check
2607 * interval should also be less than the timeout.
2608 *
2609 * Note: we have to use pretty tight timings here to satisfy
2610 * the NIST-PCTS.
2611 */
2612 char_time = (info->timeout - HZ / 50) / info->xmit_fifo_size;
2613 char_time = char_time / 5;
2614 if (char_time <= 0)
2615 char_time = 1;
2616 if (timeout < 0)
2617 timeout = 0;
2618 if (timeout)
2619 char_time = min(char_time, timeout);
2620 /*
2621 * If the transmitter hasn't cleared in twice the approximate
2622 * amount of time to send the entire FIFO, it probably won't
2623 * ever clear. This assumes the UART isn't doing flow
2624 * control, which is currently the case. Hence, if it ever
2625 * takes longer than info->timeout, this is probably due to a
2626 * UART bug of some kind. So, we clamp the timeout parameter at
2627 * 2*info->timeout.
2628 */
2629 if (!timeout || timeout > 2 * info->timeout)
2630 timeout = 2 * info->timeout;
1da177e4 2631#ifdef CY_DEBUG_WAIT_UNTIL_SENT
21719191
JS		 2632 printk(KERN_DEBUG "In cy_wait_until_sent(%d) check=%d, jiff=%lu...",
2633 timeout, char_time, jiffies);
1da177e4 2634#endif
02f1175c 2635 card = info->card;
875b206b
JS		 2636 channel = (info->line) - (card->first_line);
2637 if (!IS_CYC_Z(*card)) {
02f1175c
JS		 2638 chip = channel >> 2;
2639 channel &= 0x03;
875b206b
JS		 2640 index = card->bus_index;
2641 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
db05c3b1 2642 while (readb(base_addr + (CySRER << index)) & CyTxRdy) {
1da177e4 2643#ifdef CY_DEBUG_WAIT_UNTIL_SENT
21719191 2644 printk(KERN_DEBUG "Not clean (jiff=%lu)...", jiffies);
1da177e4 2645#endif
02f1175c
JS		 2646 if (msleep_interruptible(jiffies_to_msecs(char_time)))
2647 break;
2648 if (timeout && time_after(jiffies, orig_jiffies +
2649 timeout))
2650 break;
2651 }
1da177e4 2652 }
02f1175c
JS		 2653 /* Run one more char cycle */
2654 msleep_interruptible(jiffies_to_msecs(char_time * 5));
1da177e4 2655#ifdef CY_DEBUG_WAIT_UNTIL_SENT
21719191 2656 printk(KERN_DEBUG "Clean (jiff=%lu)...done\n", jiffies);
1da177e4
LT		 2657#endif
2658}
2659
2660/*
2661 * This routine is called when a particular tty device is closed.
2662 */
02f1175c 2663static void cy_close(struct tty_struct *tty, struct file *filp)
1da177e4 2664{
cab9bdd1 2665 struct cyclades_port *info = tty->driver_data;
9fa1b3b1 2666 struct cyclades_card *card;
02f1175c 2667 unsigned long flags;
1da177e4
LT		 2668
2669#ifdef CY_DEBUG_OTHER
21719191 2670 printk(KERN_DEBUG "cyc:cy_close ttyC%d\n", info->line);
1da177e4
LT		 2671#endif
2672
02f1175c
JS		 2673 if (!info || serial_paranoia_check(info, tty->name, "cy_close")) {
2674 return;
2675 }
1da177e4 2676
9fa1b3b1
JS		 2677 card = info->card;
2678
2679 spin_lock_irqsave(&card->card_lock, flags);
02f1175c
JS		 2680 /* If the TTY is being hung up, nothing to do */
2681 if (tty_hung_up_p(filp)) {
9fa1b3b1 2682 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c
JS		 2683 return;
2684 }
1da177e4 2685#ifdef CY_DEBUG_OPEN
21719191
JS		 2686 printk(KERN_DEBUG "cyc:cy_close ttyC%d, count = %d\n", info->line,
2687 info->count);
1da177e4 2688#endif
02f1175c
JS		 2689 if ((tty->count == 1) && (info->count != 1)) {
2690 /*
2691 * Uh, oh. tty->count is 1, which means that the tty
2692 * structure will be freed. Info->count should always
2693 * be one in these conditions. If it's greater than
2694 * one, we've got real problems, since it means the
2695 * serial port won't be shutdown.
2696 */
21719191
JS		 2697 printk(KERN_ERR "cyc:cy_close: bad serial port count; "
2698 "tty->count is 1, info->count is %d\n", info->count);
02f1175c
JS		 2699 info->count = 1;
2700 }
1da177e4 2701#ifdef CY_DEBUG_COUNT
21719191 2702 printk(KERN_DEBUG "cyc:cy_close at (%d): decrementing count to %d\n",
02f1175c 2703 current->pid, info->count - 1);
1da177e4 2704#endif
02f1175c 2705 if (--info->count < 0) {
1da177e4 2706#ifdef CY_DEBUG_COUNT
21719191 2707 printk(KERN_DEBUG "cyc:cyc_close setting count to 0\n");
1da177e4 2708#endif
02f1175c 2709 info->count = 0;
1da177e4 2710 }
02f1175c 2711 if (info->count) {
9fa1b3b1 2712 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c
JS		 2713 return;
2714 }
2715 info->flags |= ASYNC_CLOSING;
1da177e4 2716
02f1175c
JS		 2717 /*
2718 * Now we wait for the transmit buffer to clear; and we notify
2719 * the line discipline to only process XON/XOFF characters.
2720 */
2721 tty->closing = 1;
9fa1b3b1 2722 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c
JS		 2723 if (info->closing_wait != CY_CLOSING_WAIT_NONE) {
2724 tty_wait_until_sent(tty, info->closing_wait);
1da177e4 2725 }
9fa1b3b1 2726 spin_lock_irqsave(&card->card_lock, flags);
02f1175c 2727
9fa1b3b1
JS		 2728 if (!IS_CYC_Z(*card)) {
2729 int channel = info->line - card->first_line;
2730 int index = card->bus_index;
2731 void __iomem *base_addr = card->base_addr +
02f1175c
JS		 2732 (cy_chip_offset[channel >> 2] << index);
2733 /* Stop accepting input */
2734 channel &= 0x03;
2735 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
2736 cy_writeb(base_addr + (CySRER << index),
db05c3b1 2737 readb(base_addr + (CySRER << index)) & ~CyRxData);
02f1175c
JS		 2738 if (info->flags & ASYNC_INITIALIZED) {
2739 /* Waiting for on-board buffers to be empty before closing
2740 the port */
9fa1b3b1 2741 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c 2742 cy_wait_until_sent(tty, info->timeout);
9fa1b3b1 2743 spin_lock_irqsave(&card->card_lock, flags);
02f1175c
JS		 2744 }
2745 } else {
2746#ifdef Z_WAKE
2747 /* Waiting for on-board buffers to be empty before closing the port */
9fa1b3b1 2748 void __iomem *base_addr = card->base_addr;
02f1175c
JS		 2749 struct FIRM_ID __iomem *firm_id = base_addr + ID_ADDRESS;
2750 struct ZFW_CTRL __iomem *zfw_ctrl =
db05c3b1 2751 base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
02f1175c 2752 struct CH_CTRL __iomem *ch_ctrl = zfw_ctrl->ch_ctrl;
9fa1b3b1 2753 int channel = info->line - card->first_line;
02f1175c
JS		 2754 int retval;
2755
db05c3b1 2756 if (readl(&ch_ctrl[channel].flow_status) != C_FS_TXIDLE) {
9fa1b3b1 2757 retval = cyz_issue_cmd(card, channel, C_CM_IOCTLW, 0L);
02f1175c 2758 if (retval != 0) {
21719191
JS		 2759 printk(KERN_DEBUG "cyc:cy_close retval on "
2760 "ttyC%d was %x\n", info->line, retval);
02f1175c 2761 }
9fa1b3b1 2762 spin_unlock_irqrestore(&card->card_lock, flags);
2c7fea99 2763 wait_for_completion_interruptible(&info->shutdown_wait);
9fa1b3b1 2764 spin_lock_irqsave(&card->card_lock, flags);
02f1175c 2765 }
1da177e4 2766#endif
02f1175c
JS		 2767 }
2768
9fa1b3b1 2769 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c
JS		 2770 shutdown(info);
2771 if (tty->driver->flush_buffer)
2772 tty->driver->flush_buffer(tty);
2773 tty_ldisc_flush(tty);
9fa1b3b1 2774 spin_lock_irqsave(&card->card_lock, flags);
02f1175c
JS		 2775
2776 tty->closing = 0;
2777 info->event = 0;
2778 info->tty = NULL;
2779 if (info->blocked_open) {
9fa1b3b1 2780 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c
JS		 2781 if (info->close_delay) {
2782 msleep_interruptible(jiffies_to_msecs
2783 (info->close_delay));
2784 }
2785 wake_up_interruptible(&info->open_wait);
9fa1b3b1 2786 spin_lock_irqsave(&card->card_lock, flags);
02f1175c
JS		 2787 }
2788 info->flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CLOSING);
2789 wake_up_interruptible(&info->close_wait);
1da177e4
LT		 2790
2791#ifdef CY_DEBUG_OTHER
21719191 2792 printk(KERN_DEBUG "cyc:cy_close done\n");
1da177e4
LT		 2793#endif
2794
9fa1b3b1 2795 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c 2796} /* cy_close */
1da177e4
LT		 2797
2798/* This routine gets called when tty_write has put something into
2799 * the write_queue. The characters may come from user space or
2800 * kernel space.
2801 *
2802 * This routine will return the number of characters actually
2803 * accepted for writing.
2804 *
2805 * If the port is not already transmitting stuff, start it off by
2806 * enabling interrupts. The interrupt service routine will then
2807 * ensure that the characters are sent.
2808 * If the port is already active, there is no need to kick it.
2809 *
2810 */
02f1175c 2811static int cy_write(struct tty_struct *tty, const unsigned char *buf, int count)
1da177e4 2812{
cab9bdd1 2813 struct cyclades_port *info = tty->driver_data;
02f1175c
JS		 2814 unsigned long flags;
2815 int c, ret = 0;
1da177e4
LT		 2816
2817#ifdef CY_DEBUG_IO
21719191 2818 printk(KERN_DEBUG "cyc:cy_write ttyC%d\n", info->line);
1da177e4
LT		 2819#endif
2820
02f1175c
JS		 2821 if (serial_paranoia_check(info, tty->name, "cy_write")) {
2822 return 0;
2823 }
1da177e4 2824
02f1175c
JS		 2825 if (!info->xmit_buf)
2826 return 0;
1da177e4 2827
9fa1b3b1 2828 spin_lock_irqsave(&info->card->card_lock, flags);
02f1175c
JS		 2829 while (1) {
2830 c = min(count, min((int)(SERIAL_XMIT_SIZE - info->xmit_cnt - 1),
2831 (int)(SERIAL_XMIT_SIZE - info->xmit_head)));
2832
2833 if (c <= 0)
2834 break;
2835
2836 memcpy(info->xmit_buf + info->xmit_head, buf, c);
2837 info->xmit_head = (info->xmit_head + c) &
2838 (SERIAL_XMIT_SIZE - 1);
2839 info->xmit_cnt += c;
2840 buf += c;
2841 count -= c;
2842 ret += c;
2843 }
9fa1b3b1 2844 spin_unlock_irqrestore(&info->card->card_lock, flags);
02f1175c
JS		 2845
2846 info->idle_stats.xmit_bytes += ret;
2847 info->idle_stats.xmit_idle = jiffies;
2848
2849 if (info->xmit_cnt && !tty->stopped && !tty->hw_stopped) {
2850 start_xmit(info);
2851 }
2852 return ret;
2853} /* cy_write */
1da177e4
LT		 2854
2855/*
2856 * This routine is called by the kernel to write a single
2857 * character to the tty device. If the kernel uses this routine,
2858 * it must call the flush_chars() routine (if defined) when it is
2859 * done stuffing characters into the driver. If there is no room
2860 * in the queue, the character is ignored.
2861 */
02f1175c 2862static void cy_put_char(struct tty_struct *tty, unsigned char ch)
1da177e4 2863{
cab9bdd1 2864 struct cyclades_port *info = tty->driver_data;
02f1175c 2865 unsigned long flags;
1da177e4
LT		 2866
2867#ifdef CY_DEBUG_IO
21719191 2868 printk(KERN_DEBUG "cyc:cy_put_char ttyC%d\n", info->line);
1da177e4
LT		 2869#endif
2870
02f1175c
JS		 2871 if (serial_paranoia_check(info, tty->name, "cy_put_char"))
2872 return;
1da177e4 2873
02f1175c
JS		 2874 if (!info->xmit_buf)
2875 return;
1da177e4 2876
9fa1b3b1 2877 spin_lock_irqsave(&info->card->card_lock, flags);
90cc3018 2878 if (info->xmit_cnt >= (int)(SERIAL_XMIT_SIZE - 1)) {
9fa1b3b1 2879 spin_unlock_irqrestore(&info->card->card_lock, flags);
02f1175c
JS		 2880 return;
2881 }
1da177e4 2882
02f1175c
JS		 2883 info->xmit_buf[info->xmit_head++] = ch;
2884 info->xmit_head &= SERIAL_XMIT_SIZE - 1;
2885 info->xmit_cnt++;
1da177e4
LT		 2886 info->idle_stats.xmit_bytes++;
2887 info->idle_stats.xmit_idle = jiffies;
9fa1b3b1 2888 spin_unlock_irqrestore(&info->card->card_lock, flags);
02f1175c 2889} /* cy_put_char */
1da177e4
LT		 2890
2891/*
2892 * This routine is called by the kernel after it has written a
2893 * series of characters to the tty device using put_char().
2894 */
02f1175c 2895static void cy_flush_chars(struct tty_struct *tty)
1da177e4 2896{
cab9bdd1 2897 struct cyclades_port *info = tty->driver_data;
02f1175c 2898
1da177e4 2899#ifdef CY_DEBUG_IO
21719191 2900 printk(KERN_DEBUG "cyc:cy_flush_chars ttyC%d\n", info->line);
1da177e4
LT		 2901#endif
2902
02f1175c
JS		 2903 if (serial_paranoia_check(info, tty->name, "cy_flush_chars"))
2904 return;
1da177e4 2905
02f1175c
JS		 2906 if (info->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped ||
2907 !info->xmit_buf)
2908 return;
1da177e4 2909
02f1175c
JS		 2910 start_xmit(info);
2911} /* cy_flush_chars */
1da177e4
LT		 2912
2913/*
2914 * This routine returns the numbers of characters the tty driver
2915 * will accept for queuing to be written. This number is subject
2916 * to change as output buffers get emptied, or if the output flow
2917 * control is activated.
2918 */
02f1175c 2919static int cy_write_room(struct tty_struct *tty)
1da177e4 2920{
cab9bdd1 2921 struct cyclades_port *info = tty->driver_data;
02f1175c
JS		 2922 int ret;
2923
1da177e4 2924#ifdef CY_DEBUG_IO
21719191 2925 printk(KERN_DEBUG "cyc:cy_write_room ttyC%d\n", info->line);
1da177e4
LT		 2926#endif
2927
02f1175c
JS		 2928 if (serial_paranoia_check(info, tty->name, "cy_write_room"))
2929 return 0;
2930 ret = SERIAL_XMIT_SIZE - info->xmit_cnt - 1;
2931 if (ret < 0)
2932 ret = 0;
2933 return ret;
2934} /* cy_write_room */
1da177e4 2935
02f1175c 2936static int cy_chars_in_buffer(struct tty_struct *tty)
1da177e4 2937{
875b206b 2938 struct cyclades_card *card;
cab9bdd1 2939 struct cyclades_port *info = tty->driver_data;
875b206b 2940 int channel;
1da177e4 2941
02f1175c
JS		 2942 if (serial_paranoia_check(info, tty->name, "cy_chars_in_buffer"))
2943 return 0;
2944
2945 card = info->card;
875b206b 2946 channel = (info->line) - (card->first_line);
1da177e4
LT		 2947
2948#ifdef Z_EXT_CHARS_IN_BUFFER
02f1175c
JS		 2949 if (!IS_CYC_Z(cy_card[card])) {
2950#endif /* Z_EXT_CHARS_IN_BUFFER */
1da177e4 2951#ifdef CY_DEBUG_IO
21719191
JS		 2952 printk(KERN_DEBUG "cyc:cy_chars_in_buffer ttyC%d %d\n",
2953 info->line, info->xmit_cnt);
1da177e4 2954#endif
02f1175c 2955 return info->xmit_cnt;
1da177e4 2956#ifdef Z_EXT_CHARS_IN_BUFFER
02f1175c 2957 } else {
ad39c300
JS		 2958 static struct FIRM_ID *firm_id;
2959 static struct ZFW_CTRL *zfw_ctrl;
2960 static struct CH_CTRL *ch_ctrl;
2961 static struct BUF_CTRL *buf_ctrl;
02f1175c 2962 int char_count;
ad39c300 2963 __u32 tx_put, tx_get, tx_bufsize;
02f1175c 2964
875b206b
JS		 2965 firm_id = card->base_addr + ID_ADDRESS;
2966 zfw_ctrl = card->base_addr +
db05c3b1 2967 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
02f1175c
JS		 2968 ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]);
2969 buf_ctrl = &(zfw_ctrl->buf_ctrl[channel]);
2970
db05c3b1
JS		 2971 tx_get = readl(&buf_ctrl->tx_get);
2972 tx_put = readl(&buf_ctrl->tx_put);
2973 tx_bufsize = readl(&buf_ctrl->tx_bufsize);
02f1175c
JS		 2974 if (tx_put >= tx_get)
2975 char_count = tx_put - tx_get;
2976 else
2977 char_count = tx_put - tx_get + tx_bufsize;
1da177e4 2978#ifdef CY_DEBUG_IO
21719191
JS		 2979 printk(KERN_DEBUG "cyc:cy_chars_in_buffer ttyC%d %d\n",
2980 info->line, info->xmit_cnt + char_count);
1da177e4 2981#endif
096dcfce 2982 return info->xmit_cnt + char_count;
02f1175c
JS		 2983 }
2984#endif /* Z_EXT_CHARS_IN_BUFFER */
2985} /* cy_chars_in_buffer */
1da177e4
LT		 2986
2987/*
2988 * ------------------------------------------------------------
2989 * cy_ioctl() and friends
2990 * ------------------------------------------------------------
2991 */
2992
1a86b5e3 2993static void cyy_baud_calc(struct cyclades_port *info, __u32 baud)
1da177e4 2994{
02f1175c 2995 int co, co_val, bpr;
1a86b5e3 2996 __u32 cy_clock = ((info->chip_rev >= CD1400_REV_J) ? 60000000 :
02f1175c 2997 25000000);
1da177e4 2998
02f1175c
JS		 2999 if (baud == 0) {
3000 info->tbpr = info->tco = info->rbpr = info->rco = 0;
3001 return;
3002 }
1da177e4 3003
02f1175c
JS		 3004 /* determine which prescaler to use */
3005 for (co = 4, co_val = 2048; co; co--, co_val >>= 2) {
3006 if (cy_clock / co_val / baud > 63)
3007 break;
3008 }
1da177e4 3009
02f1175c
JS		 3010 bpr = (cy_clock / co_val * 2 / baud + 1) / 2;
3011 if (bpr > 255)
3012 bpr = 255;
1da177e4 3013
02f1175c
JS		 3014 info->tbpr = info->rbpr = bpr;
3015 info->tco = info->rco = co;
1da177e4
LT		 3016}
3017
3018/*
3019 * This routine finds or computes the various line characteristics.
3020 * It used to be called config_setup
3021 */
02f1175c 3022static void set_line_char(struct cyclades_port *info)
1da177e4 3023{
875b206b 3024 struct cyclades_card *card;
02f1175c
JS		 3025 unsigned long flags;
3026 void __iomem *base_addr;
875b206b 3027 int chip, channel, index;
02f1175c
JS		 3028 unsigned cflag, iflag;
3029 unsigned short chip_number;
3030 int baud, baud_rate = 0;
3031 int i;
3032
3033 if (!info->tty || !info->tty->termios) {
3034 return;
1da177e4 3035 }
02f1175c
JS		 3036 if (info->line == -1) {
3037 return;
1da177e4 3038 }
02f1175c
JS		 3039 cflag = info->tty->termios->c_cflag;
3040 iflag = info->tty->termios->c_iflag;
1da177e4 3041
02f1175c
JS		 3042 /*
3043 * Set up the tty->alt_speed kludge
3044 */
3045 if (info->tty) {
3046 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
3047 info->tty->alt_speed = 57600;
3048 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
3049 info->tty->alt_speed = 115200;
3050 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
3051 info->tty->alt_speed = 230400;
3052 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
3053 info->tty->alt_speed = 460800;
1da177e4 3054 }
02f1175c
JS		 3055
3056 card = info->card;
875b206b 3057 channel = info->line - card->first_line;
02f1175c
JS		 3058 chip_number = channel / 4;
3059
875b206b 3060 if (!IS_CYC_Z(*card)) {
02f1175c 3061
875b206b 3062 index = card->bus_index;
02f1175c
JS		 3063
3064 /* baud rate */
3065 baud = tty_get_baud_rate(info->tty);
3066 if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
3067 ASYNC_SPD_CUST) {
3068 if (info->custom_divisor)
3069 baud_rate = info->baud / info->custom_divisor;
3070 else
3071 baud_rate = info->baud;
3072 } else if (baud > CD1400_MAX_SPEED) {
3073 baud = CD1400_MAX_SPEED;
3074 }
3075 /* find the baud index */
3076 for (i = 0; i < 20; i++) {
3077 if (baud == baud_table[i]) {
3078 break;
3079 }
3080 }
3081 if (i == 20) {
3082 i = 19; /* CD1400_MAX_SPEED */
3083 }
3084
3085 if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
3086 ASYNC_SPD_CUST) {
3087 cyy_baud_calc(info, baud_rate);
3088 } else {
3089 if (info->chip_rev >= CD1400_REV_J) {
3090 /* It is a CD1400 rev. J or later */
3091 info->tbpr = baud_bpr_60[i]; /* Tx BPR */
3092 info->tco = baud_co_60[i]; /* Tx CO */
3093 info->rbpr = baud_bpr_60[i]; /* Rx BPR */
3094 info->rco = baud_co_60[i]; /* Rx CO */
3095 } else {
3096 info->tbpr = baud_bpr_25[i]; /* Tx BPR */
3097 info->tco = baud_co_25[i]; /* Tx CO */
3098 info->rbpr = baud_bpr_25[i]; /* Rx BPR */
3099 info->rco = baud_co_25[i]; /* Rx CO */
3100 }
3101 }
3102 if (baud_table[i] == 134) {
3103 /* get it right for 134.5 baud */
3104 info->timeout = (info->xmit_fifo_size * HZ * 30 / 269) +
3105 2;
3106 } else if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
3107 ASYNC_SPD_CUST) {
3108 info->timeout = (info->xmit_fifo_size * HZ * 15 /
3109 baud_rate) + 2;
3110 } else if (baud_table[i]) {
3111 info->timeout = (info->xmit_fifo_size * HZ * 15 /
3112 baud_table[i]) + 2;
3113 /* this needs to be propagated into the card info */
3114 } else {
3115 info->timeout = 0;
3116 }
3117 /* By tradition (is it a standard?) a baud rate of zero
3118 implies the line should be/has been closed. A bit
3119 later in this routine such a test is performed. */
3120
3121 /* byte size and parity */
3122 info->cor5 = 0;
3123 info->cor4 = 0;
3124 /* receive threshold */
3125 info->cor3 = (info->default_threshold ?
3126 info->default_threshold : baud_cor3[i]);
3127 info->cor2 = CyETC;
3128 switch (cflag & CSIZE) {
3129 case CS5:
3130 info->cor1 = Cy_5_BITS;
3131 break;
3132 case CS6:
3133 info->cor1 = Cy_6_BITS;
3134 break;
3135 case CS7:
3136 info->cor1 = Cy_7_BITS;
3137 break;
3138 case CS8:
3139 info->cor1 = Cy_8_BITS;
3140 break;
3141 }
3142 if (cflag & CSTOPB) {
3143 info->cor1 |= Cy_2_STOP;
3144 }
3145 if (cflag & PARENB) {
3146 if (cflag & PARODD) {
3147 info->cor1 |= CyPARITY_O;
3148 } else {
3149 info->cor1 |= CyPARITY_E;
3150 }
3151 } else {
3152 info->cor1 |= CyPARITY_NONE;
3153 }
3154
3155 /* CTS flow control flag */
3156 if (cflag & CRTSCTS) {
3157 info->flags |= ASYNC_CTS_FLOW;
3158 info->cor2 |= CyCtsAE;
3159 } else {
3160 info->flags &= ~ASYNC_CTS_FLOW;
3161 info->cor2 &= ~CyCtsAE;
3162 }
3163 if (cflag & CLOCAL)
3164 info->flags &= ~ASYNC_CHECK_CD;
3165 else
3166 info->flags |= ASYNC_CHECK_CD;
1da177e4
LT		 3167
3168 /***********************************************
3169 The hardware option, CyRtsAO, presents RTS when
3170 the chip has characters to send. Since most modems
3171 use RTS as reverse (inbound) flow control, this
3172 option is not used. If inbound flow control is
3173 necessary, DTR can be programmed to provide the
3174 appropriate signals for use with a non-standard
3175 cable. Contact Marcio Saito for details.
3176 ***********************************************/
3177
02f1175c
JS		 3178 chip = channel >> 2;
3179 channel &= 0x03;
875b206b 3180 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
1da177e4 3181
9fa1b3b1 3182 spin_lock_irqsave(&card->card_lock, flags);
02f1175c
JS		 3183 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
3184
3185 /* tx and rx baud rate */
3186
3187 cy_writeb(base_addr + (CyTCOR << index), info->tco);
3188 cy_writeb(base_addr + (CyTBPR << index), info->tbpr);
3189 cy_writeb(base_addr + (CyRCOR << index), info->rco);
3190 cy_writeb(base_addr + (CyRBPR << index), info->rbpr);
3191
3192 /* set line characteristics according configuration */
3193
3194 cy_writeb(base_addr + (CySCHR1 << index),
3195 START_CHAR(info->tty));
3196 cy_writeb(base_addr + (CySCHR2 << index), STOP_CHAR(info->tty));
3197 cy_writeb(base_addr + (CyCOR1 << index), info->cor1);
3198 cy_writeb(base_addr + (CyCOR2 << index), info->cor2);
3199 cy_writeb(base_addr + (CyCOR3 << index), info->cor3);
3200 cy_writeb(base_addr + (CyCOR4 << index), info->cor4);
3201 cy_writeb(base_addr + (CyCOR5 << index), info->cor5);
3202
3203 cyy_issue_cmd(base_addr, CyCOR_CHANGE | CyCOR1ch | CyCOR2ch |
3204 CyCOR3ch, index);
3205
3206 cy_writeb(base_addr + (CyCAR << index), (u_char) channel); /* !!! Is this needed? */
3207 cy_writeb(base_addr + (CyRTPR << index),
3208 (info->default_timeout ? info->default_timeout : 0x02));
3209 /* 10ms rx timeout */
3210
3211 if (C_CLOCAL(info->tty)) {
3212 /* without modem intr */
3213 cy_writeb(base_addr + (CySRER << index),
db05c3b1 3214 readb(base_addr + (CySRER << index)) | CyMdmCh);
02f1175c
JS		 3215 /* act on 1->0 modem transitions */
3216 if ((cflag & CRTSCTS) && info->rflow) {
3217 cy_writeb(base_addr + (CyMCOR1 << index),
3218 (CyCTS | rflow_thr[i]));
3219 } else {
3220 cy_writeb(base_addr + (CyMCOR1 << index),
3221 CyCTS);
3222 }
3223 /* act on 0->1 modem transitions */
3224 cy_writeb(base_addr + (CyMCOR2 << index), CyCTS);
1da177e4 3225 } else {
02f1175c
JS		 3226 /* without modem intr */
3227 cy_writeb(base_addr + (CySRER << index),
db05c3b1 3228 readb(base_addr +
02f1175c
JS		 3229 (CySRER << index)) | CyMdmCh);
3230 /* act on 1->0 modem transitions */
3231 if ((cflag & CRTSCTS) && info->rflow) {
3232 cy_writeb(base_addr + (CyMCOR1 << index),
3233 (CyDSR | CyCTS | CyRI | CyDCD |
3234 rflow_thr[i]));
3235 } else {
3236 cy_writeb(base_addr + (CyMCOR1 << index),
3237 CyDSR | CyCTS | CyRI | CyDCD);
3238 }
3239 /* act on 0->1 modem transitions */
3240 cy_writeb(base_addr + (CyMCOR2 << index),
3241 CyDSR | CyCTS | CyRI | CyDCD);
1da177e4 3242 }
02f1175c
JS		 3243
3244 if (i == 0) { /* baud rate is zero, turn off line */
3245 if (info->rtsdtr_inv) {
3246 cy_writeb(base_addr + (CyMSVR1 << index),
3247 ~CyRTS);
3248 } else {
3249 cy_writeb(base_addr + (CyMSVR2 << index),
3250 ~CyDTR);
3251 }
1da177e4 3252#ifdef CY_DEBUG_DTR
21719191
JS		 3253 printk(KERN_DEBUG "cyc:set_line_char dropping DTR\n");
3254 printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
db05c3b1
JS		 3255 readb(base_addr + (CyMSVR1 << index)),
3256 readb(base_addr + (CyMSVR2 << index)));
1da177e4 3257#endif
02f1175c
JS		 3258 } else {
3259 if (info->rtsdtr_inv) {
3260 cy_writeb(base_addr + (CyMSVR1 << index),
3261 CyRTS);
3262 } else {
3263 cy_writeb(base_addr + (CyMSVR2 << index),
3264 CyDTR);
3265 }
1da177e4 3266#ifdef CY_DEBUG_DTR
21719191
JS		 3267 printk(KERN_DEBUG "cyc:set_line_char raising DTR\n");
3268 printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
db05c3b1
JS		 3269 readb(base_addr + (CyMSVR1 << index)),
3270 readb(base_addr + (CyMSVR2 << index)));
1da177e4 3271#endif
02f1175c 3272 }
1da177e4 3273
02f1175c
JS		 3274 if (info->tty) {
3275 clear_bit(TTY_IO_ERROR, &info->tty->flags);
3276 }
9fa1b3b1 3277 spin_unlock_irqrestore(&card->card_lock, flags);
1da177e4 3278
1da177e4 3279 } else {
02f1175c
JS		 3280 struct FIRM_ID __iomem *firm_id;
3281 struct ZFW_CTRL __iomem *zfw_ctrl;
3282 struct BOARD_CTRL __iomem *board_ctrl;
3283 struct CH_CTRL __iomem *ch_ctrl;
3284 struct BUF_CTRL __iomem *buf_ctrl;
1a86b5e3 3285 __u32 sw_flow;
02f1175c 3286 int retval;
1da177e4 3287
875b206b
JS		 3288 firm_id = card->base_addr + ID_ADDRESS;
3289 if (!ISZLOADED(*card)) {
02f1175c
JS		 3290 return;
3291 }
1da177e4 3292
875b206b 3293 zfw_ctrl = card->base_addr +
db05c3b1 3294 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
02f1175c
JS		 3295 board_ctrl = &zfw_ctrl->board_ctrl;
3296 ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]);
3297 buf_ctrl = &zfw_ctrl->buf_ctrl[channel];
3298
3299 /* baud rate */
3300 baud = tty_get_baud_rate(info->tty);
3301 if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
3302 ASYNC_SPD_CUST) {
3303 if (info->custom_divisor)
3304 baud_rate = info->baud / info->custom_divisor;
3305 else
3306 baud_rate = info->baud;
3307 } else if (baud > CYZ_MAX_SPEED) {
3308 baud = CYZ_MAX_SPEED;
3309 }
3310 cy_writel(&ch_ctrl->comm_baud, baud);
3311
3312 if (baud == 134) {
3313 /* get it right for 134.5 baud */
3314 info->timeout = (info->xmit_fifo_size * HZ * 30 / 269) +
3315 2;
3316 } else if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
3317 ASYNC_SPD_CUST) {
3318 info->timeout = (info->xmit_fifo_size * HZ * 15 /
3319 baud_rate) + 2;
3320 } else if (baud) {
3321 info->timeout = (info->xmit_fifo_size * HZ * 15 /
3322 baud) + 2;
3323 /* this needs to be propagated into the card info */
3324 } else {
3325 info->timeout = 0;
3326 }
1da177e4 3327
02f1175c
JS		 3328 /* byte size and parity */
3329 switch (cflag & CSIZE) {
3330 case CS5:
3331 cy_writel(&ch_ctrl->comm_data_l, C_DL_CS5);
3332 break;
3333 case CS6:
3334 cy_writel(&ch_ctrl->comm_data_l, C_DL_CS6);
3335 break;
3336 case CS7:
3337 cy_writel(&ch_ctrl->comm_data_l, C_DL_CS7);
3338 break;
3339 case CS8:
3340 cy_writel(&ch_ctrl->comm_data_l, C_DL_CS8);
3341 break;
3342 }
3343 if (cflag & CSTOPB) {
3344 cy_writel(&ch_ctrl->comm_data_l,
db05c3b1 3345 readl(&ch_ctrl->comm_data_l) | C_DL_2STOP);
02f1175c
JS		 3346 } else {
3347 cy_writel(&ch_ctrl->comm_data_l,
db05c3b1 3348 readl(&ch_ctrl->comm_data_l) | C_DL_1STOP);
02f1175c
JS		 3349 }
3350 if (cflag & PARENB) {
3351 if (cflag & PARODD) {
3352 cy_writel(&ch_ctrl->comm_parity, C_PR_ODD);
3353 } else {
3354 cy_writel(&ch_ctrl->comm_parity, C_PR_EVEN);
3355 }
3356 } else {
3357 cy_writel(&ch_ctrl->comm_parity, C_PR_NONE);
3358 }
1da177e4 3359
02f1175c
JS		 3360 /* CTS flow control flag */
3361 if (cflag & CRTSCTS) {
3362 cy_writel(&ch_ctrl->hw_flow,
db05c3b1 3363 readl(&ch_ctrl->hw_flow) | C_RS_CTS | C_RS_RTS);
02f1175c 3364 } else {
db05c3b1
JS		 3365 cy_writel(&ch_ctrl->hw_flow, readl(&ch_ctrl->hw_flow) &
3366 ~(C_RS_CTS | C_RS_RTS));
02f1175c
JS		 3367 }
3368 /* As the HW flow control is done in firmware, the driver
3369 doesn't need to care about it */
3370 info->flags &= ~ASYNC_CTS_FLOW;
3371
3372 /* XON/XOFF/XANY flow control flags */
3373 sw_flow = 0;
3374 if (iflag & IXON) {
3375 sw_flow |= C_FL_OXX;
3376 if (iflag & IXANY)
3377 sw_flow |= C_FL_OIXANY;
3378 }
3379 cy_writel(&ch_ctrl->sw_flow, sw_flow);
3380
875b206b 3381 retval = cyz_issue_cmd(card, channel, C_CM_IOCTL, 0L);
02f1175c 3382 if (retval != 0) {
21719191
JS		 3383 printk(KERN_ERR "cyc:set_line_char retval on ttyC%d "
3384 "was %x\n", info->line, retval);
02f1175c
JS		 3385 }
3386
3387 /* CD sensitivity */
3388 if (cflag & CLOCAL) {
3389 info->flags &= ~ASYNC_CHECK_CD;
3390 } else {
3391 info->flags |= ASYNC_CHECK_CD;
3392 }
1da177e4 3393
02f1175c
JS		 3394 if (baud == 0) { /* baud rate is zero, turn off line */
3395 cy_writel(&ch_ctrl->rs_control,
db05c3b1 3396 readl(&ch_ctrl->rs_control) & ~C_RS_DTR);
1da177e4 3397#ifdef CY_DEBUG_DTR
21719191 3398 printk(KERN_DEBUG "cyc:set_line_char dropping Z DTR\n");
1da177e4 3399#endif
02f1175c
JS		 3400 } else {
3401 cy_writel(&ch_ctrl->rs_control,
db05c3b1 3402 readl(&ch_ctrl->rs_control) | C_RS_DTR);
1da177e4 3403#ifdef CY_DEBUG_DTR
21719191 3404 printk(KERN_DEBUG "cyc:set_line_char raising Z DTR\n");
1da177e4 3405#endif
02f1175c 3406 }
1da177e4 3407
875b206b 3408 retval = cyz_issue_cmd(card, channel, C_CM_IOCTLM,0L);
02f1175c 3409 if (retval != 0) {
21719191
JS		 3410 printk(KERN_ERR "cyc:set_line_char(2) retval on ttyC%d "
3411 "was %x\n", info->line, retval);
02f1175c 3412 }
1da177e4 3413
02f1175c
JS		 3414 if (info->tty) {
3415 clear_bit(TTY_IO_ERROR, &info->tty->flags);
3416 }
1da177e4 3417 }
02f1175c 3418} /* set_line_char */
1da177e4
LT		 3419
3420static int
02f1175c
JS		 3421get_serial_info(struct cyclades_port *info,
3422 struct serial_struct __user * retinfo)
1da177e4 3423{
02f1175c 3424 struct serial_struct tmp;
875b206b 3425 struct cyclades_card *cinfo = info->card;
1da177e4 3426
02f1175c
JS		 3427 if (!retinfo)
3428 return -EFAULT;
3429 memset(&tmp, 0, sizeof(tmp));
3430 tmp.type = info->type;
3431 tmp.line = info->line;
875b206b
JS		 3432 tmp.port = (info->card - cy_card) * 0x100 + info->line -
3433 cinfo->first_line;
02f1175c
JS		 3434 tmp.irq = cinfo->irq;
3435 tmp.flags = info->flags;
3436 tmp.close_delay = info->close_delay;
d5dedf99 3437 tmp.closing_wait = info->closing_wait;
02f1175c
JS		 3438 tmp.baud_base = info->baud;
3439 tmp.custom_divisor = info->custom_divisor;
3440 tmp.hub6 = 0; /*!!! */
3441 return copy_to_user(retinfo, &tmp, sizeof(*retinfo)) ? -EFAULT : 0;
3442} /* get_serial_info */
1da177e4
LT		 3443
3444static int
02f1175c
JS		 3445set_serial_info(struct cyclades_port *info,
3446 struct serial_struct __user * new_info)
1da177e4 3447{
02f1175c
JS		 3448 struct serial_struct new_serial;
3449 struct cyclades_port old_info;
3450
3451 if (copy_from_user(&new_serial, new_info, sizeof(new_serial)))
3452 return -EFAULT;
3453 old_info = *info;
3454
3455 if (!capable(CAP_SYS_ADMIN)) {
3456 if (new_serial.close_delay != info->close_delay ||
3457 new_serial.baud_base != info->baud ||
3458 (new_serial.flags & ASYNC_FLAGS &
3459 ~ASYNC_USR_MASK) !=
3460 (info->flags & ASYNC_FLAGS & ~ASYNC_USR_MASK))
3461 return -EPERM;
3462 info->flags = (info->flags & ~ASYNC_USR_MASK) |
3463 (new_serial.flags & ASYNC_USR_MASK);
3464 info->baud = new_serial.baud_base;
3465 info->custom_divisor = new_serial.custom_divisor;
3466 goto check_and_exit;
3467 }
3468
3469 /*
3470 * OK, past this point, all the error checking has been done.
3471 * At this point, we start making changes.....
3472 */
3473
3474 info->baud = new_serial.baud_base;
3475 info->custom_divisor = new_serial.custom_divisor;
3476 info->flags = (info->flags & ~ASYNC_FLAGS) |
3477 (new_serial.flags & ASYNC_FLAGS);
3478 info->close_delay = new_serial.close_delay * HZ / 100;
3479 info->closing_wait = new_serial.closing_wait * HZ / 100;
1da177e4
LT		 3480
3481check_and_exit:
02f1175c
JS		 3482 if (info->flags & ASYNC_INITIALIZED) {
3483 set_line_char(info);
3484 return 0;
3485 } else {
3486 return startup(info);
3487 }
3488} /* set_serial_info */
1da177e4
LT		 3489
3490/*
3491 * get_lsr_info - get line status register info
3492 *
3493 * Purpose: Let user call ioctl() to get info when the UART physically
3494 * is emptied. On bus types like RS485, the transmitter must
3495 * release the bus after transmitting. This must be done when
3496 * the transmit shift register is empty, not be done when the
3497 * transmit holding register is empty. This functionality
3498 * allows an RS485 driver to be written in user space.
3499 */
02f1175c 3500static int get_lsr_info(struct cyclades_port *info, unsigned int __user * value)
1da177e4 3501{
875b206b
JS		 3502 struct cyclades_card *card;
3503 int chip, channel, index;
02f1175c
JS		 3504 unsigned char status;
3505 unsigned int result;
3506 unsigned long flags;
3507 void __iomem *base_addr;
1da177e4 3508
02f1175c 3509 card = info->card;
875b206b
JS		 3510 channel = (info->line) - (card->first_line);
3511 if (!IS_CYC_Z(*card)) {
02f1175c
JS		 3512 chip = channel >> 2;
3513 channel &= 0x03;
875b206b
JS		 3514 index = card->bus_index;
3515 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
02f1175c 3516
9fa1b3b1 3517 spin_lock_irqsave(&card->card_lock, flags);
db05c3b1 3518 status = readb(base_addr + (CySRER << index)) &
02f1175c 3519 (CyTxRdy | CyTxMpty);
9fa1b3b1 3520 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c
JS		 3521 result = (status ? 0 : TIOCSER_TEMT);
3522 } else {
3523 /* Not supported yet */
3524 return -EINVAL;
3525 }
3526 return put_user(result, (unsigned long __user *)value);
1da177e4
LT		 3527}
3528
02f1175c 3529static int cy_tiocmget(struct tty_struct *tty, struct file *file)
1da177e4 3530{
cab9bdd1 3531 struct cyclades_port *info = tty->driver_data;
875b206b
JS		 3532 struct cyclades_card *card;
3533 int chip, channel, index;
02f1175c
JS		 3534 void __iomem *base_addr;
3535 unsigned long flags;
3536 unsigned char status;
3537 unsigned long lstatus;
3538 unsigned int result;
3539 struct FIRM_ID __iomem *firm_id;
3540 struct ZFW_CTRL __iomem *zfw_ctrl;
3541 struct BOARD_CTRL __iomem *board_ctrl;
3542 struct CH_CTRL __iomem *ch_ctrl;
3543
3544 if (serial_paranoia_check(info, tty->name, __FUNCTION__))
3545 return -ENODEV;
1da177e4 3546
02f1175c 3547 card = info->card;
875b206b
JS		 3548 channel = info->line - card->first_line;
3549 if (!IS_CYC_Z(*card)) {
02f1175c
JS		 3550 chip = channel >> 2;
3551 channel &= 0x03;
875b206b
JS		 3552 index = card->bus_index;
3553 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
1da177e4 3554
9fa1b3b1 3555 spin_lock_irqsave(&card->card_lock, flags);
02f1175c 3556 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
db05c3b1
JS		 3557 status = readb(base_addr + (CyMSVR1 << index));
3558 status |= readb(base_addr + (CyMSVR2 << index));
9fa1b3b1 3559 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c
JS		 3560
3561 if (info->rtsdtr_inv) {
3562 result = ((status & CyRTS) ? TIOCM_DTR : 0) |
3563 ((status & CyDTR) ? TIOCM_RTS : 0);
3564 } else {
3565 result = ((status & CyRTS) ? TIOCM_RTS : 0) |
3566 ((status & CyDTR) ? TIOCM_DTR : 0);
3567 }
3568 result |= ((status & CyDCD) ? TIOCM_CAR : 0) |
3569 ((status & CyRI) ? TIOCM_RNG : 0) |
3570 ((status & CyDSR) ? TIOCM_DSR : 0) |
3571 ((status & CyCTS) ? TIOCM_CTS : 0);
1da177e4 3572 } else {
875b206b
JS		 3573 base_addr = card->base_addr;
3574 firm_id = card->base_addr + ID_ADDRESS;
3575 if (ISZLOADED(*card)) {
3576 zfw_ctrl = card->base_addr +
db05c3b1 3577 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
02f1175c
JS		 3578 board_ctrl = &zfw_ctrl->board_ctrl;
3579 ch_ctrl = zfw_ctrl->ch_ctrl;
db05c3b1 3580 lstatus = readl(&ch_ctrl[channel].rs_status);
02f1175c
JS		 3581 result = ((lstatus & C_RS_RTS) ? TIOCM_RTS : 0) |
3582 ((lstatus & C_RS_DTR) ? TIOCM_DTR : 0) |
3583 ((lstatus & C_RS_DCD) ? TIOCM_CAR : 0) |
3584 ((lstatus & C_RS_RI) ? TIOCM_RNG : 0) |
3585 ((lstatus & C_RS_DSR) ? TIOCM_DSR : 0) |
3586 ((lstatus & C_RS_CTS) ? TIOCM_CTS : 0);
3587 } else {
3588 result = 0;
3589 return -ENODEV;
3590 }
1da177e4 3591
02f1175c
JS		 3592 }
3593 return result;
3594} /* cy_tiomget */
1da177e4
LT		 3595
3596static int
3597cy_tiocmset(struct tty_struct *tty, struct file *file,
02f1175c 3598 unsigned int set, unsigned int clear)
1da177e4 3599{
cab9bdd1 3600 struct cyclades_port *info = tty->driver_data;
875b206b
JS		 3601 struct cyclades_card *card;
3602 int chip, channel, index;
02f1175c
JS		 3603 void __iomem *base_addr;
3604 unsigned long flags;
3605 struct FIRM_ID __iomem *firm_id;
3606 struct ZFW_CTRL __iomem *zfw_ctrl;
3607 struct BOARD_CTRL __iomem *board_ctrl;
3608 struct CH_CTRL __iomem *ch_ctrl;
3609 int retval;
3610
3611 if (serial_paranoia_check(info, tty->name, __FUNCTION__))
3612 return -ENODEV;
3613
3614 card = info->card;
875b206b
JS		 3615 channel = (info->line) - (card->first_line);
3616 if (!IS_CYC_Z(*card)) {
02f1175c
JS		 3617 chip = channel >> 2;
3618 channel &= 0x03;
875b206b
JS		 3619 index = card->bus_index;
3620 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
02f1175c
JS		 3621
3622 if (set & TIOCM_RTS) {
9fa1b3b1 3623 spin_lock_irqsave(&card->card_lock, flags);
02f1175c
JS		 3624 cy_writeb(base_addr + (CyCAR << index),
3625 (u_char) channel);
3626 if (info->rtsdtr_inv) {
3627 cy_writeb(base_addr + (CyMSVR2 << index),
3628 CyDTR);
3629 } else {
3630 cy_writeb(base_addr + (CyMSVR1 << index),
3631 CyRTS);
3632 }
9fa1b3b1 3633 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c
JS		 3634 }
3635 if (clear & TIOCM_RTS) {
9fa1b3b1 3636 spin_lock_irqsave(&card->card_lock, flags);
02f1175c
JS		 3637 cy_writeb(base_addr + (CyCAR << index),
3638 (u_char) channel);
3639 if (info->rtsdtr_inv) {
3640 cy_writeb(base_addr + (CyMSVR2 << index),
3641 ~CyDTR);
3642 } else {
3643 cy_writeb(base_addr + (CyMSVR1 << index),
3644 ~CyRTS);
3645 }
9fa1b3b1 3646 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c
JS		 3647 }
3648 if (set & TIOCM_DTR) {
9fa1b3b1 3649 spin_lock_irqsave(&card->card_lock, flags);
02f1175c
JS		 3650 cy_writeb(base_addr + (CyCAR << index),
3651 (u_char) channel);
3652 if (info->rtsdtr_inv) {
3653 cy_writeb(base_addr + (CyMSVR1 << index),
3654 CyRTS);
3655 } else {
3656 cy_writeb(base_addr + (CyMSVR2 << index),
3657 CyDTR);
3658 }
1da177e4 3659#ifdef CY_DEBUG_DTR
21719191
JS		 3660 printk(KERN_DEBUG "cyc:set_modem_info raising DTR\n");
3661 printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
db05c3b1
JS		 3662 readb(base_addr + (CyMSVR1 << index)),
3663 readb(base_addr + (CyMSVR2 << index)));
1da177e4 3664#endif
9fa1b3b1 3665 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c
JS		 3666 }
3667 if (clear & TIOCM_DTR) {
9fa1b3b1 3668 spin_lock_irqsave(&card->card_lock, flags);
02f1175c
JS		 3669 cy_writeb(base_addr + (CyCAR << index),
3670 (u_char) channel);
3671 if (info->rtsdtr_inv) {
3672 cy_writeb(base_addr + (CyMSVR1 << index),
3673 ~CyRTS);
3674 } else {
3675 cy_writeb(base_addr + (CyMSVR2 << index),
3676 ~CyDTR);
3677 }
1da177e4
LT		 3678
3679#ifdef CY_DEBUG_DTR
21719191
JS		 3680 printk(KERN_DEBUG "cyc:set_modem_info dropping DTR\n");
3681 printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
db05c3b1
JS		 3682 readb(base_addr + (CyMSVR1 << index)),
3683 readb(base_addr + (CyMSVR2 << index)));
1da177e4 3684#endif
9fa1b3b1 3685 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c
JS		 3686 }
3687 } else {
875b206b 3688 base_addr = card->base_addr;
02f1175c 3689
875b206b
JS		 3690 firm_id = card->base_addr + ID_ADDRESS;
3691 if (ISZLOADED(*card)) {
3692 zfw_ctrl = card->base_addr +
db05c3b1 3693 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
02f1175c
JS		 3694 board_ctrl = &zfw_ctrl->board_ctrl;
3695 ch_ctrl = zfw_ctrl->ch_ctrl;
3696
3697 if (set & TIOCM_RTS) {
9fa1b3b1 3698 spin_lock_irqsave(&card->card_lock, flags);
02f1175c 3699 cy_writel(&ch_ctrl[channel].rs_control,
db05c3b1
JS		 3700 readl(&ch_ctrl[channel].rs_control) |
3701 C_RS_RTS);
9fa1b3b1 3702 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c
JS		 3703 }
3704 if (clear & TIOCM_RTS) {
9fa1b3b1 3705 spin_lock_irqsave(&card->card_lock, flags);
02f1175c 3706 cy_writel(&ch_ctrl[channel].rs_control,
db05c3b1
JS		 3707 readl(&ch_ctrl[channel].rs_control) &
3708 ~C_RS_RTS);
9fa1b3b1 3709 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c
JS		 3710 }
3711 if (set & TIOCM_DTR) {
9fa1b3b1 3712 spin_lock_irqsave(&card->card_lock, flags);
02f1175c 3713 cy_writel(&ch_ctrl[channel].rs_control,
db05c3b1
JS		 3714 readl(&ch_ctrl[channel].rs_control) |
3715 C_RS_DTR);
1da177e4 3716#ifdef CY_DEBUG_DTR
21719191
JS		 3717 printk(KERN_DEBUG "cyc:set_modem_info raising "
3718 "Z DTR\n");
1da177e4 3719#endif
9fa1b3b1 3720 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c
JS		 3721 }
3722 if (clear & TIOCM_DTR) {
9fa1b3b1 3723 spin_lock_irqsave(&card->card_lock, flags);
02f1175c 3724 cy_writel(&ch_ctrl[channel].rs_control,
db05c3b1
JS		 3725 readl(&ch_ctrl[channel].rs_control) &
3726 ~C_RS_DTR);
1da177e4 3727#ifdef CY_DEBUG_DTR
21719191
JS		 3728 printk(KERN_DEBUG "cyc:set_modem_info clearing "
3729 "Z DTR\n");
1da177e4 3730#endif
9fa1b3b1 3731 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c
JS		 3732 }
3733 } else {
3734 return -ENODEV;
3735 }
9fa1b3b1
JS		 3736 spin_lock_irqsave(&card->card_lock, flags);
3737 retval = cyz_issue_cmd(card, channel, C_CM_IOCTLM, 0L);
02f1175c 3738 if (retval != 0) {
21719191
JS		 3739 printk(KERN_ERR "cyc:set_modem_info retval on ttyC%d "
3740 "was %x\n", info->line, retval);
02f1175c 3741 }
9fa1b3b1 3742 spin_unlock_irqrestore(&card->card_lock, flags);
1da177e4 3743 }
02f1175c
JS		 3744 return 0;
3745} /* cy_tiocmset */
1da177e4
LT		 3746
3747/*
3748 * cy_break() --- routine which turns the break handling on or off
3749 */
02f1175c 3750static void cy_break(struct tty_struct *tty, int break_state)
1da177e4 3751{
cab9bdd1 3752 struct cyclades_port *info = tty->driver_data;
9fa1b3b1 3753 struct cyclades_card *card;
02f1175c 3754 unsigned long flags;
1da177e4 3755
02f1175c
JS		 3756 if (serial_paranoia_check(info, tty->name, "cy_break"))
3757 return;
1da177e4 3758
9fa1b3b1
JS		 3759 card = info->card;
3760
3761 spin_lock_irqsave(&card->card_lock, flags);
3762 if (!IS_CYC_Z(*card)) {
02f1175c
JS		 3763 /* Let the transmit ISR take care of this (since it
3764 requires stuffing characters into the output stream).
3765 */
3766 if (break_state == -1) {
3767 if (!info->breakon) {
3768 info->breakon = 1;
3769 if (!info->xmit_cnt) {
9fa1b3b1 3770 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c 3771 start_xmit(info);
9fa1b3b1 3772 spin_lock_irqsave(&card->card_lock, flags);
02f1175c
JS		 3773 }
3774 }
3775 } else {
3776 if (!info->breakoff) {
3777 info->breakoff = 1;
3778 if (!info->xmit_cnt) {
9fa1b3b1 3779 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c 3780 start_xmit(info);
9fa1b3b1 3781 spin_lock_irqsave(&card->card_lock, flags);
02f1175c
JS		 3782 }
3783 }
1da177e4 3784 }
1da177e4 3785 } else {
02f1175c
JS		 3786 int retval;
3787
3788 if (break_state == -1) {
9fa1b3b1
JS		 3789 retval = cyz_issue_cmd(card,
3790 info->line - card->first_line,
02f1175c
JS		 3791 C_CM_SET_BREAK, 0L);
3792 if (retval != 0) {
21719191
JS		 3793 printk(KERN_ERR "cyc:cy_break (set) retval on "
3794 "ttyC%d was %x\n", info->line, retval);
02f1175c
JS		 3795 }
3796 } else {
9fa1b3b1
JS		 3797 retval = cyz_issue_cmd(card,
3798 info->line - card->first_line,
02f1175c
JS		 3799 C_CM_CLR_BREAK, 0L);
3800 if (retval != 0) {
21719191
JS		 3801 printk(KERN_DEBUG "cyc:cy_break (clr) retval "
3802 "on ttyC%d was %x\n", info->line,
3803 retval);
02f1175c 3804 }
1da177e4 3805 }
1da177e4 3806 }
9fa1b3b1 3807 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c 3808} /* cy_break */
1da177e4
LT		 3809
3810static int
02f1175c 3811get_mon_info(struct cyclades_port *info, struct cyclades_monitor __user * mon)
1da177e4
LT		 3812{
3813
02f1175c
JS		 3814 if (copy_to_user(mon, &info->mon, sizeof(struct cyclades_monitor)))
3815 return -EFAULT;
3816 info->mon.int_count = 0;
3817 info->mon.char_count = 0;
3818 info->mon.char_max = 0;
3819 info->mon.char_last = 0;
3820 return 0;
3821} /* get_mon_info */
1da177e4 3822
02f1175c 3823static int set_threshold(struct cyclades_port *info, unsigned long value)
1da177e4 3824{
875b206b 3825 struct cyclades_card *card;
02f1175c 3826 void __iomem *base_addr;
875b206b 3827 int channel, chip, index;
02f1175c 3828 unsigned long flags;
1da177e4 3829
02f1175c 3830 card = info->card;
875b206b
JS		 3831 channel = info->line - card->first_line;
3832 if (!IS_CYC_Z(*card)) {
02f1175c
JS		 3833 chip = channel >> 2;
3834 channel &= 0x03;
875b206b 3835 index = card->bus_index;
02f1175c 3836 base_addr =
875b206b 3837 card->base_addr + (cy_chip_offset[chip] << index);
02f1175c
JS		 3838
3839 info->cor3 &= ~CyREC_FIFO;
3840 info->cor3 |= value & CyREC_FIFO;
1da177e4 3841
9fa1b3b1 3842 spin_lock_irqsave(&card->card_lock, flags);
02f1175c
JS		 3843 cy_writeb(base_addr + (CyCOR3 << index), info->cor3);
3844 cyy_issue_cmd(base_addr, CyCOR_CHANGE | CyCOR3ch, index);
9fa1b3b1 3845 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c
JS		 3846 }
3847 return 0;
3848} /* set_threshold */
1da177e4
LT		 3849
3850static int
02f1175c 3851get_threshold(struct cyclades_port *info, unsigned long __user * value)
1da177e4 3852{
875b206b 3853 struct cyclades_card *card;
02f1175c 3854 void __iomem *base_addr;
875b206b 3855 int channel, chip, index;
02f1175c 3856 unsigned long tmp;
1da177e4 3857
02f1175c 3858 card = info->card;
875b206b
JS		 3859 channel = info->line - card->first_line;
3860 if (!IS_CYC_Z(*card)) {
02f1175c
JS		 3861 chip = channel >> 2;
3862 channel &= 0x03;
875b206b
JS		 3863 index = card->bus_index;
3864 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
02f1175c 3865
db05c3b1 3866 tmp = readb(base_addr + (CyCOR3 << index)) & CyREC_FIFO;
02f1175c 3867 return put_user(tmp, value);
02f1175c 3868 }
f7429034 3869 return 0;
02f1175c 3870} /* get_threshold */
1da177e4
LT		 3871
3872static int
02f1175c 3873set_default_threshold(struct cyclades_port *info, unsigned long value)
1da177e4 3874{
02f1175c
JS		 3875 info->default_threshold = value & 0x0f;
3876 return 0;
3877} /* set_default_threshold */
1da177e4
LT		 3878
3879static int
02f1175c 3880get_default_threshold(struct cyclades_port *info, unsigned long __user * value)
1da177e4 3881{
02f1175c
JS		 3882 return put_user(info->default_threshold, value);
3883} /* get_default_threshold */
1da177e4 3884
02f1175c 3885static int set_timeout(struct cyclades_port *info, unsigned long value)
1da177e4 3886{
875b206b 3887 struct cyclades_card *card;
02f1175c 3888 void __iomem *base_addr;
875b206b 3889 int channel, chip, index;
02f1175c 3890 unsigned long flags;
1da177e4 3891
02f1175c 3892 card = info->card;
875b206b
JS		 3893 channel = info->line - card->first_line;
3894 if (!IS_CYC_Z(*card)) {
02f1175c
JS		 3895 chip = channel >> 2;
3896 channel &= 0x03;
875b206b
JS		 3897 index = card->bus_index;
3898 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
1da177e4 3899
9fa1b3b1 3900 spin_lock_irqsave(&card->card_lock, flags);
02f1175c 3901 cy_writeb(base_addr + (CyRTPR << index), value & 0xff);
9fa1b3b1 3902 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c
JS		 3903 }
3904 return 0;
3905} /* set_timeout */
1da177e4 3906
02f1175c 3907static int get_timeout(struct cyclades_port *info, unsigned long __user * value)
1da177e4 3908{
875b206b 3909 struct cyclades_card *card;
02f1175c 3910 void __iomem *base_addr;
875b206b 3911 int channel, chip, index;
02f1175c 3912 unsigned long tmp;
1da177e4 3913
02f1175c 3914 card = info->card;
875b206b
JS		 3915 channel = info->line - card->first_line;
3916 if (!IS_CYC_Z(*card)) {
02f1175c
JS		 3917 chip = channel >> 2;
3918 channel &= 0x03;
875b206b
JS		 3919 index = card->bus_index;
3920 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
02f1175c 3921
db05c3b1 3922 tmp = readb(base_addr + (CyRTPR << index));
02f1175c 3923 return put_user(tmp, value);
02f1175c 3924 }
f7429034 3925 return 0;
02f1175c 3926} /* get_timeout */
1da177e4 3927
02f1175c 3928static int set_default_timeout(struct cyclades_port *info, unsigned long value)
1da177e4 3929{
02f1175c
JS		 3930 info->default_timeout = value & 0xff;
3931 return 0;
3932} /* set_default_timeout */
1da177e4
LT		 3933
3934static int
02f1175c 3935get_default_timeout(struct cyclades_port *info, unsigned long __user * value)
1da177e4 3936{
02f1175c
JS		 3937 return put_user(info->default_timeout, value);
3938} /* get_default_timeout */
1da177e4
LT		 3939
3940/*
3941 * This routine allows the tty driver to implement device-
3942 * specific ioctl's. If the ioctl number passed in cmd is
3943 * not recognized by the driver, it should return ENOIOCTLCMD.
3944 */
3945static int
02f1175c
JS		 3946cy_ioctl(struct tty_struct *tty, struct file *file,
3947 unsigned int cmd, unsigned long arg)
1da177e4 3948{
cab9bdd1 3949 struct cyclades_port *info = tty->driver_data;
02f1175c
JS		 3950 struct cyclades_icount cprev, cnow; /* kernel counter temps */
3951 struct serial_icounter_struct __user *p_cuser; /* user space */
3952 int ret_val = 0;
3953 unsigned long flags;
3954 void __user *argp = (void __user *)arg;
3955
3956 if (serial_paranoia_check(info, tty->name, "cy_ioctl"))
3957 return -ENODEV;
1da177e4
LT		 3958
3959#ifdef CY_DEBUG_OTHER
21719191
JS		 3960 printk(KERN_DEBUG "cyc:cy_ioctl ttyC%d, cmd = %x arg = %lx\n",
3961 info->line, cmd, arg);
1da177e4
LT		 3962#endif
3963
02f1175c
JS		 3964 switch (cmd) {
3965 case CYGETMON:
3966 ret_val = get_mon_info(info, argp);
3967 break;
3968 case CYGETTHRESH:
3969 ret_val = get_threshold(info, argp);
3970 break;
3971 case CYSETTHRESH:
3972 ret_val = set_threshold(info, arg);
3973 break;
3974 case CYGETDEFTHRESH:
3975 ret_val = get_default_threshold(info, argp);
3976 break;
3977 case CYSETDEFTHRESH:
3978 ret_val = set_default_threshold(info, arg);
3979 break;
3980 case CYGETTIMEOUT:
3981 ret_val = get_timeout(info, argp);
3982 break;
3983 case CYSETTIMEOUT:
3984 ret_val = set_timeout(info, arg);
3985 break;
3986 case CYGETDEFTIMEOUT:
3987 ret_val = get_default_timeout(info, argp);
3988 break;
3989 case CYSETDEFTIMEOUT:
3990 ret_val = set_default_timeout(info, arg);
3991 break;
1da177e4 3992 case CYSETRFLOW:
02f1175c
JS		 3993 info->rflow = (int)arg;
3994 ret_val = 0;
3995 break;
1da177e4 3996 case CYGETRFLOW:
02f1175c
JS		 3997 ret_val = info->rflow;
3998 break;
1da177e4 3999 case CYSETRTSDTR_INV:
02f1175c
JS		 4000 info->rtsdtr_inv = (int)arg;
4001 ret_val = 0;
4002 break;
1da177e4 4003 case CYGETRTSDTR_INV:
02f1175c
JS		 4004 ret_val = info->rtsdtr_inv;
4005 break;
1da177e4 4006 case CYGETCD1400VER:
02f1175c
JS		 4007 ret_val = info->chip_rev;
4008 break;
1da177e4
LT		 4009#ifndef CONFIG_CYZ_INTR
4010 case CYZSETPOLLCYCLE:
02f1175c
JS		 4011 cyz_polling_cycle = (arg * HZ) / 1000;
4012 ret_val = 0;
4013 break;
1da177e4 4014 case CYZGETPOLLCYCLE:
02f1175c
JS		 4015 ret_val = (cyz_polling_cycle * 1000) / HZ;
4016 break;
4017#endif /* CONFIG_CYZ_INTR */
1da177e4 4018 case CYSETWAIT:
02f1175c
JS		 4019 info->closing_wait = (unsigned short)arg *HZ / 100;
4020 ret_val = 0;
4021 break;
1da177e4 4022 case CYGETWAIT:
02f1175c
JS		 4023 ret_val = info->closing_wait / (HZ / 100);
4024 break;
4025 case TIOCGSERIAL:
4026 ret_val = get_serial_info(info, argp);
4027 break;
4028 case TIOCSSERIAL:
4029 ret_val = set_serial_info(info, argp);
4030 break;
4031 case TIOCSERGETLSR: /* Get line status register */
4032 ret_val = get_lsr_info(info, argp);
4033 break;
4034 /*
4035 * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
4036 * - mask passed in arg for lines of interest
4037 * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
4038 * Caller should use TIOCGICOUNT to see which one it was
4039 */
1da177e4 4040 case TIOCMIWAIT:
9fa1b3b1 4041 spin_lock_irqsave(&info->card->card_lock, flags);
02f1175c 4042 /* note the counters on entry */
2c7fea99 4043 cnow = info->icount;
9fa1b3b1 4044 spin_unlock_irqrestore(&info->card->card_lock, flags);
2c7fea99
JS		 4045 ret_val = wait_event_interruptible(info->delta_msr_wait, ({
4046 cprev = cnow;
9fa1b3b1 4047 spin_lock_irqsave(&info->card->card_lock, flags);
02f1175c 4048 cnow = info->icount; /* atomic copy */
9fa1b3b1 4049 spin_unlock_irqrestore(&info->card->card_lock, flags);
02f1175c 4050
2c7fea99
JS		 4051 ((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
4052 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
4053 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) ||
4054 ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts));
4055 }));
4056 break;
1da177e4 4057
02f1175c
JS		 4058 /*
4059 * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
4060 * Return: write counters to the user passed counter struct
4061 * NB: both 1->0 and 0->1 transitions are counted except for
4062 * RI where only 0->1 is counted.
4063 */
1da177e4 4064 case TIOCGICOUNT:
9fa1b3b1 4065 spin_lock_irqsave(&info->card->card_lock, flags);
02f1175c 4066 cnow = info->icount;
9fa1b3b1 4067 spin_unlock_irqrestore(&info->card->card_lock, flags);
02f1175c
JS		 4068 p_cuser = argp;
4069 ret_val = put_user(cnow.cts, &p_cuser->cts);
4070 if (ret_val)
4071 return ret_val;
4072 ret_val = put_user(cnow.dsr, &p_cuser->dsr);
4073 if (ret_val)
4074 return ret_val;
4075 ret_val = put_user(cnow.rng, &p_cuser->rng);
4076 if (ret_val)
4077 return ret_val;
4078 ret_val = put_user(cnow.dcd, &p_cuser->dcd);
4079 if (ret_val)
4080 return ret_val;
4081 ret_val = put_user(cnow.rx, &p_cuser->rx);
4082 if (ret_val)
4083 return ret_val;
4084 ret_val = put_user(cnow.tx, &p_cuser->tx);
4085 if (ret_val)
4086 return ret_val;
4087 ret_val = put_user(cnow.frame, &p_cuser->frame);
4088 if (ret_val)
4089 return ret_val;
4090 ret_val = put_user(cnow.overrun, &p_cuser->overrun);
4091 if (ret_val)
4092 return ret_val;
4093 ret_val = put_user(cnow.parity, &p_cuser->parity);
4094 if (ret_val)
4095 return ret_val;
4096 ret_val = put_user(cnow.brk, &p_cuser->brk);
4097 if (ret_val)
4098 return ret_val;
4099 ret_val = put_user(cnow.buf_overrun, &p_cuser->buf_overrun);
4100 if (ret_val)
4101 return ret_val;
4102 ret_val = 0;
4103 break;
4104 default:
4105 ret_val = -ENOIOCTLCMD;
4106 }
1da177e4
LT		 4107
4108#ifdef CY_DEBUG_OTHER
21719191 4109 printk(KERN_DEBUG "cyc:cy_ioctl done\n");
1da177e4
LT		 4110#endif
4111
02f1175c
JS		 4112 return ret_val;
4113} /* cy_ioctl */
1da177e4
LT		 4114
4115/*
4116 * This routine allows the tty driver to be notified when
4117 * device's termios settings have changed. Note that a
4118 * well-designed tty driver should be prepared to accept the case
4119 * where old == NULL, and try to do something rational.
4120 */
02f1175c 4121static void cy_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
1da177e4 4122{
cab9bdd1 4123 struct cyclades_port *info = tty->driver_data;
1da177e4
LT		 4124
4125#ifdef CY_DEBUG_OTHER
21719191 4126 printk(KERN_DEBUG "cyc:cy_set_termios ttyC%d\n", info->line);
1da177e4
LT		 4127#endif
4128
02f1175c
JS		 4129 if (tty->termios->c_cflag == old_termios->c_cflag &&
4130 (tty->termios->c_iflag & (IXON | IXANY)) ==
4131 (old_termios->c_iflag & (IXON | IXANY)))
4132 return;
4133 set_line_char(info);
4134
4135 if ((old_termios->c_cflag & CRTSCTS) &&
4136 !(tty->termios->c_cflag & CRTSCTS)) {
4137 tty->hw_stopped = 0;
4138 cy_start(tty);
4139 }
1da177e4 4140#if 0
02f1175c
JS		 4141 /*
4142 * No need to wake up processes in open wait, since they
4143 * sample the CLOCAL flag once, and don't recheck it.
4144 * XXX It's not clear whether the current behavior is correct
4145 * or not. Hence, this may change.....
4146 */
4147 if (!(old_termios->c_cflag & CLOCAL) &&
4148 (tty->termios->c_cflag & CLOCAL))
4149 wake_up_interruptible(&info->open_wait);
1da177e4 4150#endif
02f1175c 4151} /* cy_set_termios */
1da177e4
LT		 4152
4153/* This function is used to send a high-priority XON/XOFF character to
4154 the device.
4155*/
02f1175c 4156static void cy_send_xchar(struct tty_struct *tty, char ch)
1da177e4 4157{
cab9bdd1 4158 struct cyclades_port *info = tty->driver_data;
875b206b
JS		 4159 struct cyclades_card *card;
4160 int channel;
1da177e4 4161
02f1175c 4162 if (serial_paranoia_check(info, tty->name, "cy_send_xchar"))
1da177e4
LT		 4163 return;
4164
02f1175c 4165 info->x_char = ch;
1da177e4
LT		 4166
4167 if (ch)
02f1175c 4168 cy_start(tty);
1da177e4
LT		 4169
4170 card = info->card;
875b206b 4171 channel = info->line - card->first_line;
1da177e4 4172
875b206b 4173 if (IS_CYC_Z(*card)) {
02f1175c 4174 if (ch == STOP_CHAR(tty))
875b206b 4175 cyz_issue_cmd(card, channel, C_CM_SENDXOFF, 0L);
02f1175c 4176 else if (ch == START_CHAR(tty))
875b206b 4177 cyz_issue_cmd(card, channel, C_CM_SENDXON, 0L);
1da177e4
LT		 4178 }
4179}
4180
4181/* This routine is called by the upper-layer tty layer to signal
4182 that incoming characters should be throttled because the input
4183 buffers are close to full.
4184 */
02f1175c 4185static void cy_throttle(struct tty_struct *tty)
1da177e4 4186{
cab9bdd1 4187 struct cyclades_port *info = tty->driver_data;
875b206b 4188 struct cyclades_card *card;
02f1175c
JS		 4189 unsigned long flags;
4190 void __iomem *base_addr;
875b206b 4191 int chip, channel, index;
1da177e4
LT		 4192
4193#ifdef CY_DEBUG_THROTTLE
02f1175c 4194 char buf[64];
1da177e4 4195
21719191 4196 printk(KERN_DEBUG "cyc:throttle %s: %ld...ttyC%d\n", tty_name(tty, buf),
02f1175c 4197 tty->ldisc.chars_in_buffer(tty), info->line);
1da177e4
LT		 4198#endif
4199
02f1175c
JS		 4200 if (serial_paranoia_check(info, tty->name, "cy_throttle")) {
4201 return;
4202 }
4203
4204 card = info->card;
4205
4206 if (I_IXOFF(tty)) {
875b206b 4207 if (!IS_CYC_Z(*card))
02f1175c
JS		 4208 cy_send_xchar(tty, STOP_CHAR(tty));
4209 else
4210 info->throttle = 1;
4211 }
1da177e4 4212
02f1175c 4213 if (tty->termios->c_cflag & CRTSCTS) {
875b206b
JS		 4214 channel = info->line - card->first_line;
4215 if (!IS_CYC_Z(*card)) {
02f1175c
JS		 4216 chip = channel >> 2;
4217 channel &= 0x03;
875b206b
JS		 4218 index = card->bus_index;
4219 base_addr = card->base_addr +
02f1175c
JS		 4220 (cy_chip_offset[chip] << index);
4221
9fa1b3b1 4222 spin_lock_irqsave(&card->card_lock, flags);
02f1175c
JS		 4223 cy_writeb(base_addr + (CyCAR << index),
4224 (u_char) channel);
4225 if (info->rtsdtr_inv) {
4226 cy_writeb(base_addr + (CyMSVR2 << index),
4227 ~CyDTR);
4228 } else {
4229 cy_writeb(base_addr + (CyMSVR1 << index),
4230 ~CyRTS);
4231 }
9fa1b3b1 4232 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c
JS		 4233 } else {
4234 info->throttle = 1;
4235 }
4236 }
02f1175c 4237} /* cy_throttle */
1da177e4
LT		 4238
4239/*
4240 * This routine notifies the tty driver that it should signal
4241 * that characters can now be sent to the tty without fear of
4242 * overrunning the input buffers of the line disciplines.
4243 */
02f1175c 4244static void cy_unthrottle(struct tty_struct *tty)
1da177e4 4245{
cab9bdd1 4246 struct cyclades_port *info = tty->driver_data;
875b206b 4247 struct cyclades_card *card;
02f1175c
JS		 4248 unsigned long flags;
4249 void __iomem *base_addr;
875b206b 4250 int chip, channel, index;
1da177e4
LT		 4251
4252#ifdef CY_DEBUG_THROTTLE
02f1175c
JS		 4253 char buf[64];
4254
21719191
JS		 4255 printk(KERN_DEBUG "cyc:unthrottle %s: %ld...ttyC%d\n",
4256 tty_name(tty, buf), tty->ldisc.chars_in_buffer(tty),info->line);
1da177e4
LT		 4257#endif
4258
02f1175c
JS		 4259 if (serial_paranoia_check(info, tty->name, "cy_unthrottle")) {
4260 return;
4261 }
1da177e4 4262
02f1175c
JS		 4263 if (I_IXOFF(tty)) {
4264 if (info->x_char)
4265 info->x_char = 0;
4266 else
4267 cy_send_xchar(tty, START_CHAR(tty));
1da177e4 4268 }
1da177e4 4269
02f1175c
JS		 4270 if (tty->termios->c_cflag & CRTSCTS) {
4271 card = info->card;
875b206b
JS		 4272 channel = info->line - card->first_line;
4273 if (!IS_CYC_Z(*card)) {
02f1175c
JS		 4274 chip = channel >> 2;
4275 channel &= 0x03;
875b206b
JS		 4276 index = card->bus_index;
4277 base_addr = card->base_addr +
02f1175c
JS		 4278 (cy_chip_offset[chip] << index);
4279
9fa1b3b1 4280 spin_lock_irqsave(&card->card_lock, flags);
02f1175c
JS		 4281 cy_writeb(base_addr + (CyCAR << index),
4282 (u_char) channel);
4283 if (info->rtsdtr_inv) {
4284 cy_writeb(base_addr + (CyMSVR2 << index),
4285 CyDTR);
4286 } else {
4287 cy_writeb(base_addr + (CyMSVR1 << index),
4288 CyRTS);
4289 }
9fa1b3b1 4290 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c
JS		 4291 } else {
4292 info->throttle = 0;
4293 }
4294 }
02f1175c 4295} /* cy_unthrottle */
1da177e4
LT		 4296
4297/* cy_start and cy_stop provide software output flow control as a
4298 function of XON/XOFF, software CTS, and other such stuff.
4299*/
02f1175c 4300static void cy_stop(struct tty_struct *tty)
1da177e4 4301{
02f1175c 4302 struct cyclades_card *cinfo;
cab9bdd1 4303 struct cyclades_port *info = tty->driver_data;
02f1175c
JS		 4304 void __iomem *base_addr;
4305 int chip, channel, index;
4306 unsigned long flags;
1da177e4
LT		 4307
4308#ifdef CY_DEBUG_OTHER
21719191 4309 printk(KERN_DEBUG "cyc:cy_stop ttyC%d\n", info->line);
1da177e4
LT		 4310#endif
4311
02f1175c
JS		 4312 if (serial_paranoia_check(info, tty->name, "cy_stop"))
4313 return;
1da177e4 4314
875b206b 4315 cinfo = info->card;
02f1175c
JS		 4316 channel = info->line - cinfo->first_line;
4317 if (!IS_CYC_Z(*cinfo)) {
4318 index = cinfo->bus_index;
4319 chip = channel >> 2;
4320 channel &= 0x03;
9fa1b3b1 4321 base_addr = cinfo->base_addr + (cy_chip_offset[chip] << index);
1da177e4 4322
9fa1b3b1 4323 spin_lock_irqsave(&cinfo->card_lock, flags);
02f1175c
JS		 4324 cy_writeb(base_addr + (CyCAR << index),
4325 (u_char)(channel & 0x0003)); /* index channel */
4326 cy_writeb(base_addr + (CySRER << index),
db05c3b1 4327 readb(base_addr + (CySRER << index)) & ~CyTxRdy);
9fa1b3b1 4328 spin_unlock_irqrestore(&cinfo->card_lock, flags);
02f1175c 4329 }
02f1175c 4330} /* cy_stop */
1da177e4 4331
02f1175c 4332static void cy_start(struct tty_struct *tty)
1da177e4 4333{
02f1175c 4334 struct cyclades_card *cinfo;
cab9bdd1 4335 struct cyclades_port *info = tty->driver_data;
02f1175c
JS		 4336 void __iomem *base_addr;
4337 int chip, channel, index;
4338 unsigned long flags;
1da177e4
LT		 4339
4340#ifdef CY_DEBUG_OTHER
21719191 4341 printk(KERN_DEBUG "cyc:cy_start ttyC%d\n", info->line);
1da177e4
LT		 4342#endif
4343
02f1175c
JS		 4344 if (serial_paranoia_check(info, tty->name, "cy_start"))
4345 return;
1da177e4 4346
875b206b 4347 cinfo = info->card;
02f1175c
JS		 4348 channel = info->line - cinfo->first_line;
4349 index = cinfo->bus_index;
4350 if (!IS_CYC_Z(*cinfo)) {
4351 chip = channel >> 2;
4352 channel &= 0x03;
9fa1b3b1 4353 base_addr = cinfo->base_addr + (cy_chip_offset[chip] << index);
1da177e4 4354
9fa1b3b1 4355 spin_lock_irqsave(&cinfo->card_lock, flags);
02f1175c
JS		 4356 cy_writeb(base_addr + (CyCAR << index), (u_char) (channel & 0x0003)); /* index channel */
4357 cy_writeb(base_addr + (CySRER << index),
db05c3b1 4358 readb(base_addr + (CySRER << index)) | CyTxRdy);
9fa1b3b1 4359 spin_unlock_irqrestore(&cinfo->card_lock, flags);
02f1175c 4360 }
02f1175c 4361} /* cy_start */
1da177e4 4362
02f1175c 4363static void cy_flush_buffer(struct tty_struct *tty)
1da177e4 4364{
cab9bdd1 4365 struct cyclades_port *info = tty->driver_data;
875b206b
JS		 4366 struct cyclades_card *card;
4367 int channel, retval;
02f1175c
JS		 4368 unsigned long flags;
4369
1da177e4 4370#ifdef CY_DEBUG_IO
21719191 4371 printk(KERN_DEBUG "cyc:cy_flush_buffer ttyC%d\n", info->line);
1da177e4
LT		 4372#endif
4373
02f1175c
JS		 4374 if (serial_paranoia_check(info, tty->name, "cy_flush_buffer"))
4375 return;
1da177e4 4376
02f1175c 4377 card = info->card;
875b206b 4378 channel = info->line - card->first_line;
1da177e4 4379
9fa1b3b1 4380 spin_lock_irqsave(&card->card_lock, flags);
02f1175c 4381 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
9fa1b3b1 4382 spin_unlock_irqrestore(&card->card_lock, flags);
1da177e4 4383
875b206b 4384 if (IS_CYC_Z(*card)) { /* If it is a Z card, flush the on-board
02f1175c 4385 buffers as well */
9fa1b3b1 4386 spin_lock_irqsave(&card->card_lock, flags);
875b206b 4387 retval = cyz_issue_cmd(card, channel, C_CM_FLUSH_TX, 0L);
02f1175c 4388 if (retval != 0) {
21719191
JS		 4389 printk(KERN_ERR "cyc: flush_buffer retval on ttyC%d "
4390 "was %x\n", info->line, retval);
02f1175c 4391 }
9fa1b3b1 4392 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c
JS		 4393 }
4394 tty_wakeup(tty);
02f1175c 4395} /* cy_flush_buffer */
1da177e4
LT		 4396
4397/*
4398 * cy_hangup() --- called by tty_hangup() when a hangup is signaled.
4399 */
02f1175c 4400static void cy_hangup(struct tty_struct *tty)
1da177e4 4401{
cab9bdd1 4402 struct cyclades_port *info = tty->driver_data;
02f1175c 4403
1da177e4 4404#ifdef CY_DEBUG_OTHER
21719191 4405 printk(KERN_DEBUG "cyc:cy_hangup ttyC%d\n", info->line);
1da177e4
LT		 4406#endif
4407
02f1175c
JS		 4408 if (serial_paranoia_check(info, tty->name, "cy_hangup"))
4409 return;
1da177e4 4410
02f1175c
JS		 4411 cy_flush_buffer(tty);
4412 shutdown(info);
4413 info->event = 0;
4414 info->count = 0;
1da177e4 4415#ifdef CY_DEBUG_COUNT
21719191
JS		 4416 printk(KERN_DEBUG "cyc:cy_hangup (%d): setting count to 0\n",
4417 current->pid);
1da177e4 4418#endif
02f1175c
JS		 4419 info->tty = NULL;
4420 info->flags &= ~ASYNC_NORMAL_ACTIVE;
4421 wake_up_interruptible(&info->open_wait);
4422} /* cy_hangup */
1da177e4
LT		 4423
4424/*
4425 * ---------------------------------------------------------------------
4426 * cy_init() and friends
4427 *
4428 * cy_init() is called at boot-time to initialize the serial driver.
4429 * ---------------------------------------------------------------------
4430 */
4431
dd025c0c 4432static int __devinit cy_init_card(struct cyclades_card *cinfo)
0809e267
JS		 4433{
4434 struct cyclades_port *info;
4435 u32 mailbox;
4436 unsigned int nports;
4437 unsigned short chip_number;
4438 int index, port;
4439
3046d50e
JS		 4440 spin_lock_init(&cinfo->card_lock);
4441
c2ad4c75 4442 if (IS_CYC_Z(*cinfo)) { /* Cyclades-Z */
0809e267
JS		 4443 mailbox = readl(&((struct RUNTIME_9060 __iomem *)
4444 cinfo->ctl_addr)->mail_box_0);
4445 nports = (mailbox == ZE_V1) ? ZE_V1_NPORTS : 8;
4446 cinfo->intr_enabled = 0;
4447 cinfo->nports = 0; /* Will be correctly set later, after
4448 Z FW is loaded */
3046d50e
JS		 4449 } else {
4450 index = cinfo->bus_index;
4451 nports = cinfo->nports = CyPORTS_PER_CHIP * cinfo->num_chips;
4452 }
4453
dd025c0c
JS		 4454 cinfo->ports = kzalloc(sizeof(*cinfo->ports) * nports, GFP_KERNEL);
4455 if (cinfo->ports == NULL) {
4456 printk(KERN_ERR "Cyclades: cannot allocate ports\n");
3137553d 4457 cinfo->nports = 0;
dd025c0c
JS		 4458 return -ENOMEM;
4459 }
4460
3046d50e
JS		 4461 for (port = cinfo->first_line; port < cinfo->first_line + nports;
4462 port++) {
dd025c0c 4463 info = &cinfo->ports[port - cinfo->first_line];
3046d50e 4464 info->magic = CYCLADES_MAGIC;
875b206b 4465 info->card = cinfo;
3046d50e
JS		 4466 info->line = port;
4467 info->flags = STD_COM_FLAGS;
4468 info->closing_wait = CLOSING_WAIT_DELAY;
4469 info->close_delay = 5 * HZ / 10;
4470
4471 INIT_WORK(&info->tqueue, do_softint);
4472 init_waitqueue_head(&info->open_wait);
4473 init_waitqueue_head(&info->close_wait);
2c7fea99 4474 init_completion(&info->shutdown_wait);
3046d50e
JS		 4475 init_waitqueue_head(&info->delta_msr_wait);
4476
4477 if (IS_CYC_Z(*cinfo)) {
0809e267 4478 info->type = PORT_STARTECH;
0809e267
JS		 4479 if (mailbox == ZO_V1)
4480 info->xmit_fifo_size = CYZ_FIFO_SIZE;
4481 else
3046d50e 4482 info->xmit_fifo_size = 4 * CYZ_FIFO_SIZE;
0809e267 4483#ifdef CONFIG_CYZ_INTR
3991428d
JS		 4484 setup_timer(&cyz_rx_full_timer[port],
4485 cyz_rx_restart, (unsigned long)info);
0809e267 4486#endif
3046d50e 4487 } else {
0809e267 4488 info->type = PORT_CIRRUS;
0809e267 4489 info->xmit_fifo_size = CyMAX_CHAR_FIFO;
3046d50e 4490 info->cor1 = CyPARITY_NONE | Cy_1_STOP | Cy_8_BITS;
0809e267
JS		 4491 info->cor2 = CyETC;
4492 info->cor3 = 0x08; /* _very_ small rcv threshold */
3046d50e 4493
0809e267 4494 chip_number = (port - cinfo->first_line) / 4;
3046d50e 4495 if ((info->chip_rev = readb(cinfo->base_addr +
0809e267
JS		 4496 (cy_chip_offset[chip_number] <<
4497 index) + (CyGFRCR << index))) >=
4498 CD1400_REV_J) {
4499 /* It is a CD1400 rev. J or later */
4500 info->tbpr = baud_bpr_60[13]; /* Tx BPR */
4501 info->tco = baud_co_60[13]; /* Tx CO */
4502 info->rbpr = baud_bpr_60[13]; /* Rx BPR */
4503 info->rco = baud_co_60[13]; /* Rx CO */
0809e267
JS		 4504 info->rtsdtr_inv = 1;
4505 } else {
4506 info->tbpr = baud_bpr_25[13]; /* Tx BPR */
4507 info->tco = baud_co_25[13]; /* Tx CO */
4508 info->rbpr = baud_bpr_25[13]; /* Rx BPR */
4509 info->rco = baud_co_25[13]; /* Rx CO */
0809e267
JS		 4510 info->rtsdtr_inv = 0;
4511 }
3046d50e
JS		 4512 info->read_status_mask = CyTIMEOUT | CySPECHAR |
4513 CyBREAK | CyPARITY | CyFRAME | CyOVERRUN;
0809e267 4514 }
3046d50e 4515
0809e267 4516 }
3046d50e
JS		 4517
4518#ifndef CONFIG_CYZ_INTR
4519 if (IS_CYC_Z(*cinfo) && !timer_pending(&cyz_timerlist)) {
4520 mod_timer(&cyz_timerlist, jiffies + 1);
4521#ifdef CY_PCI_DEBUG
4522 printk(KERN_DEBUG "Cyclades-Z polling initialized\n");
4523#endif
4524 }
4525#endif
dd025c0c 4526 return 0;
0809e267
JS		 4527}
4528
1da177e4
LT		 4529/* initialize chips on Cyclom-Y card -- return number of valid
4530 chips (which is number of ports/4) */
31b4f0a1
JS		 4531static unsigned short __devinit cyy_init_card(void __iomem *true_base_addr,
4532 int index)
1da177e4 4533{
02f1175c
JS		 4534 unsigned int chip_number;
4535 void __iomem *base_addr;
4536
4537 cy_writeb(true_base_addr + (Cy_HwReset << index), 0);
4538 /* Cy_HwReset is 0x1400 */
4539 cy_writeb(true_base_addr + (Cy_ClrIntr << index), 0);
4540 /* Cy_ClrIntr is 0x1800 */
4541 udelay(500L);
4542
4543 for (chip_number = 0; chip_number < CyMAX_CHIPS_PER_CARD; chip_number++) {
4544 base_addr =
4545 true_base_addr + (cy_chip_offset[chip_number] << index);
4546 mdelay(1);
db05c3b1 4547 if (readb(base_addr + (CyCCR << index)) != 0x00) {
02f1175c
JS		 4548 /*************
4549 printk(" chip #%d at %#6lx is never idle (CCR != 0)\n",
4550 chip_number, (unsigned long)base_addr);
4551 *************/
4552 return chip_number;
4553 }
4554
4555 cy_writeb(base_addr + (CyGFRCR << index), 0);
4556 udelay(10L);
4557
4558 /* The Cyclom-16Y does not decode address bit 9 and therefore
4559 cannot distinguish between references to chip 0 and a non-
4560 existent chip 4. If the preceding clearing of the supposed
4561 chip 4 GFRCR register appears at chip 0, there is no chip 4
4562 and this must be a Cyclom-16Y, not a Cyclom-32Ye.
4563 */
db05c3b1 4564 if (chip_number == 4 && readb(true_base_addr +
02f1175c
JS		 4565 (cy_chip_offset[0] << index) +
4566 (CyGFRCR << index)) == 0) {
4567 return chip_number;
4568 }
4569
4570 cy_writeb(base_addr + (CyCCR << index), CyCHIP_RESET);
4571 mdelay(1);
4572
db05c3b1 4573 if (readb(base_addr + (CyGFRCR << index)) == 0x00) {
02f1175c
JS		 4574 /*
4575 printk(" chip #%d at %#6lx is not responding ",
4576 chip_number, (unsigned long)base_addr);
4577 printk("(GFRCR stayed 0)\n",
4578 */
4579 return chip_number;
4580 }
db05c3b1 4581 if ((0xf0 & (readb(base_addr + (CyGFRCR << index)))) !=
02f1175c
JS		 4582 0x40) {
4583 /*
4584 printk(" chip #%d at %#6lx is not valid (GFRCR == "
4585 "%#2x)\n",
4586 chip_number, (unsigned long)base_addr,
4587 base_addr[CyGFRCR<<index]);
4588 */
4589 return chip_number;
4590 }
4591 cy_writeb(base_addr + (CyGCR << index), CyCH0_SERIAL);
db05c3b1 4592 if (readb(base_addr + (CyGFRCR << index)) >= CD1400_REV_J) {
02f1175c
JS		 4593 /* It is a CD1400 rev. J or later */
4594 /* Impossible to reach 5ms with this chip.
4595 Changed to 2ms instead (f = 500 Hz). */
4596 cy_writeb(base_addr + (CyPPR << index), CyCLOCK_60_2MS);
4597 } else {
4598 /* f = 200 Hz */
4599 cy_writeb(base_addr + (CyPPR << index), CyCLOCK_25_5MS);
4600 }
1da177e4 4601
02f1175c
JS		 4602 /*
4603 printk(" chip #%d at %#6lx is rev 0x%2x\n",
4604 chip_number, (unsigned long)base_addr,
db05c3b1 4605 readb(base_addr+(CyGFRCR<<index)));
02f1175c
JS		 4606 */
4607 }
4608 return chip_number;
4609} /* cyy_init_card */
1da177e4
LT		 4610
4611/*
4612 * ---------------------------------------------------------------------
4613 * cy_detect_isa() - Probe for Cyclom-Y/ISA boards.
4614 * sets global variables and return the number of ISA boards found.
4615 * ---------------------------------------------------------------------
4616 */
02f1175c 4617static int __init cy_detect_isa(void)
1da177e4
LT		 4618{
4619#ifdef CONFIG_ISA
02f1175c
JS		 4620 unsigned short cy_isa_irq, nboard;
4621 void __iomem *cy_isa_address;
4622 unsigned short i, j, cy_isa_nchan;
1da177e4 4623#ifdef MODULE
02f1175c 4624 int isparam = 0;
1da177e4
LT		 4625#endif
4626
02f1175c 4627 nboard = 0;
1da177e4
LT		 4628
4629#ifdef MODULE
4630 /* Check for module parameters */
02f1175c
JS		 4631 for (i = 0; i < NR_CARDS; i++) {
4632 if (maddr[i] || i) {
4633 isparam = 1;
4634 cy_isa_addresses[i] = maddr[i];
4635 }
4636 if (!maddr[i])
4637 break;
1da177e4
LT		 4638 }
4639#endif
4640
02f1175c
JS		 4641 /* scan the address table probing for Cyclom-Y/ISA boards */
4642 for (i = 0; i < NR_ISA_ADDRS; i++) {
4643 unsigned int isa_address = cy_isa_addresses[i];
4644 if (isa_address == 0x0000) {
096dcfce 4645 return nboard;
02f1175c 4646 }
1da177e4 4647
02f1175c 4648 /* probe for CD1400... */
1da177e4 4649 cy_isa_address = ioremap(isa_address, CyISA_Ywin);
3137553d
JS		 4650 if (cy_isa_address == NULL) {
4651 printk(KERN_ERR "Cyclom-Y/ISA: can't remap base "
4652 "address\n");
4653 continue;
4654 }
02f1175c
JS		 4655 cy_isa_nchan = CyPORTS_PER_CHIP *
4656 cyy_init_card(cy_isa_address, 0);
4657 if (cy_isa_nchan == 0) {
3137553d 4658 iounmap(cy_isa_address);
02f1175c
JS		 4659 continue;
4660 }
1da177e4
LT		 4661#ifdef MODULE
4662 if (isparam && irq[i])
02f1175c 4663 cy_isa_irq = irq[i];
1da177e4
LT		 4664 else
4665#endif
02f1175c
JS		 4666 /* find out the board's irq by probing */
4667 cy_isa_irq = detect_isa_irq(cy_isa_address);
4668 if (cy_isa_irq == 0) {
21719191
JS		 4669 printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but the "
4670 "IRQ could not be detected.\n",
02f1175c 4671 (unsigned long)cy_isa_address);
3137553d 4672 iounmap(cy_isa_address);
02f1175c
JS		 4673 continue;
4674 }
4675
4676 if ((cy_next_channel + cy_isa_nchan) > NR_PORTS) {
21719191
JS		 4677 printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but no "
4678 "more channels are available. Change NR_PORTS "
4679 "in cyclades.c and recompile kernel.\n",
02f1175c 4680 (unsigned long)cy_isa_address);
3137553d 4681 iounmap(cy_isa_address);
096dcfce 4682 return nboard;
02f1175c
JS		 4683 }
4684 /* fill the next cy_card structure available */
4685 for (j = 0; j < NR_CARDS; j++) {
f7429034 4686 if (cy_card[j].base_addr == NULL)
02f1175c
JS		 4687 break;
4688 }
4689 if (j == NR_CARDS) { /* no more cy_cards available */
21719191
JS		 4690 printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but no "
4691 "more cards can be used. Change NR_CARDS in "
4692 "cyclades.c and recompile kernel.\n",
02f1175c 4693 (unsigned long)cy_isa_address);
3137553d 4694 iounmap(cy_isa_address);
096dcfce 4695 return nboard;
02f1175c
JS		 4696 }
4697
4698 /* allocate IRQ */
4699 if (request_irq(cy_isa_irq, cyy_interrupt,
4700 IRQF_DISABLED, "Cyclom-Y", &cy_card[j])) {
21719191
JS		 4701 printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but "
4702 "could not allocate IRQ#%d.\n",
4703 (unsigned long)cy_isa_address, cy_isa_irq);
3137553d 4704 iounmap(cy_isa_address);
096dcfce 4705 return nboard;
02f1175c
JS		 4706 }
4707
4708 /* set cy_card */
4709 cy_card[j].base_addr = cy_isa_address;
4710 cy_card[j].ctl_addr = NULL;
4711 cy_card[j].irq = (int)cy_isa_irq;
4712 cy_card[j].bus_index = 0;
4713 cy_card[j].first_line = cy_next_channel;
4714 cy_card[j].num_chips = cy_isa_nchan / 4;
3137553d
JS		 4715 if (cy_init_card(&cy_card[j])) {
4716 cy_card[j].base_addr = NULL;
4717 free_irq(cy_isa_irq, &cy_card[j]);
4718 iounmap(cy_isa_address);
4719 continue;
4720 }
02f1175c
JS		 4721 nboard++;
4722
21719191
JS		 4723 printk(KERN_INFO "Cyclom-Y/ISA #%d: 0x%lx-0x%lx, IRQ%d found: "
4724 "%d channels starting from port %d\n",
02f1175c
JS		 4725 j + 1, (unsigned long)cy_isa_address,
4726 (unsigned long)(cy_isa_address + (CyISA_Ywin - 1)),
21719191
JS		 4727 cy_isa_irq, cy_isa_nchan, cy_next_channel);
4728
6ad1ccc1
JS		 4729 for (j = cy_next_channel;
4730 j < cy_next_channel + cy_isa_nchan; j++)
4731 tty_register_device(cy_serial_driver, j, NULL);
02f1175c
JS		 4732 cy_next_channel += cy_isa_nchan;
4733 }
096dcfce 4734 return nboard;
1da177e4 4735#else
096dcfce 4736 return 0;
02f1175c
JS		 4737#endif /* CONFIG_ISA */
4738} /* cy_detect_isa */
1da177e4 4739
58936d8d
JS		 4740#ifdef CONFIG_PCI
4741static void __devinit plx_init(void __iomem * addr, __u32 initctl)
1da177e4 4742{
02f1175c 4743 /* Reset PLX */
db05c3b1 4744 cy_writel(addr + initctl, readl(addr + initctl) | 0x40000000);
02f1175c 4745 udelay(100L);
db05c3b1 4746 cy_writel(addr + initctl, readl(addr + initctl) & ~0x40000000);
02f1175c
JS		 4747
4748 /* Reload Config. Registers from EEPROM */
db05c3b1 4749 cy_writel(addr + initctl, readl(addr + initctl) | 0x20000000);
02f1175c 4750 udelay(100L);
db05c3b1 4751 cy_writel(addr + initctl, readl(addr + initctl) & ~0x20000000);
1da177e4
LT		 4752}
4753
58936d8d
JS		 4754static int __devinit cy_pci_probe(struct pci_dev *pdev,
4755 const struct pci_device_id *ent)
1da177e4 4756{
3137553d
JS		 4757 void __iomem *addr0 = NULL, *addr2 = NULL;
4758 char *card_name = NULL;
4759 u32 mailbox;
4760 unsigned int device_id, nchan = 0, card_no, i;
4761 unsigned char plx_ver;
4762 int retval, irq;
02f1175c 4763
58936d8d
JS		 4764 retval = pci_enable_device(pdev);
4765 if (retval) {
4766 dev_err(&pdev->dev, "cannot enable device\n");
3137553d 4767 goto err;
58936d8d 4768 }
1da177e4 4769
58936d8d 4770 /* read PCI configuration area */
3137553d 4771 irq = pdev->irq;
58936d8d 4772 device_id = pdev->device & ~PCI_DEVICE_ID_MASK;
1da177e4 4773
3137553d
JS		 4774#if defined(__alpha__)
4775 if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo) { /* below 1M? */
4776 dev_err(&pdev->dev, "Cyclom-Y/PCI not supported for low "
4777 "addresses on Alpha systems.\n");
4778 retval = -EIO;
4779 goto err_dis;
4780 }
4781#endif
4782 if (device_id == PCI_DEVICE_ID_CYCLOM_Z_Lo) {
4783 dev_err(&pdev->dev, "Cyclades-Z/PCI not supported for low "
4784 "addresses\n");
4785 retval = -EIO;
4786 goto err_dis;
4787 }
4788
4789 if (pci_resource_flags(pdev, 2) & IORESOURCE_IO) {
4790 dev_warn(&pdev->dev, "PCI I/O bit incorrectly set. Ignoring "
4791 "it...\n");
4792 pdev->resource[2].flags &= ~IORESOURCE_IO;
4793 }
4794
4795 retval = pci_request_regions(pdev, "cyclades");
4796 if (retval) {
4797 dev_err(&pdev->dev, "failed to reserve resources\n");
4798 goto err_dis;
4799 }
4800
4801 retval = -EIO;
58936d8d
JS		 4802 if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo ||
4803 device_id == PCI_DEVICE_ID_CYCLOM_Y_Hi) {
3137553d 4804 card_name = "Cyclom-Y";
1da177e4 4805
3137553d
JS		 4806 addr0 = pci_iomap(pdev, 0, CyPCI_Yctl);
4807 if (addr0 == NULL) {
4808 dev_err(&pdev->dev, "can't remap ctl region\n");
4809 goto err_reg;
58936d8d 4810 }
3137553d
JS		 4811 addr2 = pci_iomap(pdev, 2, CyPCI_Ywin);
4812 if (addr2 == NULL) {
4813 dev_err(&pdev->dev, "can't remap base region\n");
4814 goto err_unmap;
58936d8d 4815 }
1da177e4 4816
3137553d
JS		 4817 nchan = CyPORTS_PER_CHIP * cyy_init_card(addr2, 1);
4818 if (nchan == 0) {
21719191
JS		 4819 dev_err(&pdev->dev, "Cyclom-Y PCI host card with no "
4820 "Serial-Modules\n");
58936d8d
JS		 4821 return -EIO;
4822 }
58936d8d 4823 } else if (device_id == PCI_DEVICE_ID_CYCLOM_Z_Hi) {
3137553d 4824 struct RUNTIME_9060 __iomem *ctl_addr;
21719191 4825
3137553d
JS		 4826 ctl_addr = addr0 = pci_iomap(pdev, 0, CyPCI_Zctl);
4827 if (addr0 == NULL) {
4828 dev_err(&pdev->dev, "can't remap ctl region\n");
4829 goto err_reg;
4830 }
58936d8d
JS		 4831
4832 /* Disable interrupts on the PLX before resetting it */
3137553d
JS		 4833 cy_writew(addr0 + 0x68,
4834 readw(addr0 + 0x68) & ~0x0900);
58936d8d 4835
3137553d 4836 plx_init(addr0, 0x6c);
58936d8d
JS		 4837 /* For some yet unknown reason, once the PLX9060 reloads
4838 the EEPROM, the IRQ is lost and, thus, we have to
4839 re-write it to the PCI config. registers.
4840 This will remain here until we find a permanent
4841 fix. */
3137553d 4842 pci_write_config_byte(pdev, PCI_INTERRUPT_LINE, irq);
02f1175c 4843
3137553d 4844 mailbox = (u32)readl(&ctl_addr->mail_box_0);
58936d8d 4845
3137553d
JS		 4846 addr2 = pci_iomap(pdev, 2, mailbox == ZE_V1 ?
4847 CyPCI_Ze_win : CyPCI_Zwin);
4848 if (addr2 == NULL) {
4849 dev_err(&pdev->dev, "can't remap base region\n");
4850 goto err_unmap;
58936d8d
JS		 4851 }
4852
4853 if (mailbox == ZE_V1) {
3137553d
JS		 4854 card_name = "Cyclades-Ze";
4855
4856 readl(&ctl_addr->mail_box_0);
4857 nchan = ZE_V1_NPORTS;
58936d8d 4858 } else {
3137553d 4859 card_name = "Cyclades-8Zo";
1da177e4
LT		 4860
4861#ifdef CY_PCI_DEBUG
3137553d
JS		 4862 if (mailbox == ZO_V1) {
4863 cy_writel(&ctl_addr->loc_addr_base, WIN_CREG);
4864 dev_info(&pdev->dev, "Cyclades-8Zo/PCI: FPGA "
4865 "id %lx, ver %lx\n", (ulong)(0xff &
4866 readl(&((struct CUSTOM_REG *)addr2)->
4867 fpga_id)), (ulong)(0xff &
4868 readl(&((struct CUSTOM_REG *)addr2)->
4869 fpga_version)));
4870 cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
4871 } else {
4872 dev_info(&pdev->dev, "Cyclades-Z/PCI: New "
4873 "Cyclades-Z board. FPGA not loaded\n");
4874 }
1da177e4 4875#endif
3137553d
JS		 4876 /* The following clears the firmware id word. This
4877 ensures that the driver will not attempt to talk to
4878 the board until it has been properly initialized.
4879 */
4880 if ((mailbox == ZO_V1) || (mailbox == ZO_V2))
4881 cy_writel(addr2 + ID_ADDRESS, 0L);
1da177e4 4882
3137553d
JS		 4883 /* This must be a Cyclades-8Zo/PCI. The extendable
4884 version will have a different device_id and will
4885 be allocated its maximum number of ports. */
4886 nchan = 8;
58936d8d 4887 }
3137553d
JS		 4888 }
4889
4890 if ((cy_next_channel + nchan) > NR_PORTS) {
4891 dev_err(&pdev->dev, "Cyclades-8Zo/PCI found, but no "
4892 "channels are available. Change NR_PORTS in "
4893 "cyclades.c and recompile kernel.\n");
4894 goto err_unmap;
4895 }
4896 /* fill the next cy_card structure available */
4897 for (card_no = 0; card_no < NR_CARDS; card_no++) {
4898 if (cy_card[card_no].base_addr == NULL)
4899 break;
4900 }
4901 if (card_no == NR_CARDS) { /* no more cy_cards available */
4902 dev_err(&pdev->dev, "Cyclades-8Zo/PCI found, but no "
4903 "more cards can be used. Change NR_CARDS in "
4904 "cyclades.c and recompile kernel.\n");
4905 goto err_unmap;
4906 }
4907
4908 if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo ||
4909 device_id == PCI_DEVICE_ID_CYCLOM_Y_Hi) {
4910 /* allocate IRQ */
4911 retval = request_irq(irq, cyy_interrupt,
4912 IRQF_SHARED, "Cyclom-Y", &cy_card[card_no]);
4913 if (retval) {
4914 dev_err(&pdev->dev, "could not allocate IRQ\n");
4915 goto err_unmap;
58936d8d 4916 }
3137553d
JS		 4917 cy_card[card_no].num_chips = nchan / 4;
4918 } else {
02f1175c 4919#ifdef CONFIG_CYZ_INTR
58936d8d 4920 /* allocate IRQ only if board has an IRQ */
3137553d
JS		 4921 if (irq != 0 && irq != 255) {
4922 retval = request_irq(irq, cyz_interrupt,
58936d8d 4923 IRQF_SHARED, "Cyclades-Z",
3137553d 4924 &cy_card[card_no]);
58936d8d 4925 if (retval) {
21719191 4926 dev_err(&pdev->dev, "could not allocate IRQ\n");
3137553d 4927 goto err_unmap;
02f1175c 4928 }
58936d8d 4929 }
02f1175c 4930#endif /* CONFIG_CYZ_INTR */
3137553d
JS		 4931 cy_card[card_no].num_chips = -1;
4932 }
02f1175c 4933
3137553d
JS		 4934 /* set cy_card */
4935 cy_card[card_no].base_addr = addr2;
4936 cy_card[card_no].ctl_addr = addr0;
4937 cy_card[card_no].irq = irq;
4938 cy_card[card_no].bus_index = 1;
4939 cy_card[card_no].first_line = cy_next_channel;
4940 retval = cy_init_card(&cy_card[card_no]);
4941 if (retval)
4942 goto err_null;
58936d8d 4943
3137553d 4944 pci_set_drvdata(pdev, &cy_card[card_no]);
58936d8d 4945
3137553d
JS		 4946 if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo ||
4947 device_id == PCI_DEVICE_ID_CYCLOM_Y_Hi) {
4948 /* enable interrupts in the PCI interface */
4949 plx_ver = readb(addr2 + CyPLX_VER) & 0x0f;
4950 switch (plx_ver) {
4951 case PLX_9050:
4952
4953 cy_writeb(addr0 + 0x4c, 0x43);
4954 break;
4955
4956 case PLX_9060:
4957 case PLX_9080:
4958 default: /* Old boards, use PLX_9060 */
4959
4960 plx_init(addr0, 0x6c);
4961 /* For some yet unknown reason, once the PLX9060 reloads
4962 the EEPROM, the IRQ is lost and, thus, we have to
4963 re-write it to the PCI config. registers.
4964 This will remain here until we find a permanent
4965 fix. */
4966 pci_write_config_byte(pdev, PCI_INTERRUPT_LINE, irq);
4967
4968 cy_writew(addr0 + 0x68, readw(addr0 + 0x68) | 0x0900);
4969 break;
4970 }
58936d8d
JS		 4971 }
4972
3137553d
JS		 4973 dev_info(&pdev->dev, "%s/PCI #%d found: %d channels starting from "
4974 "port %d.\n", card_name, card_no + 1, nchan, cy_next_channel);
4975 for (i = cy_next_channel; i < cy_next_channel + nchan; i++)
4976 tty_register_device(cy_serial_driver, i, &pdev->dev);
4977 cy_next_channel += nchan;
4978
58936d8d 4979 return 0;
3137553d
JS		 4980err_null:
4981 cy_card[card_no].base_addr = NULL;
4982 free_irq(irq, &cy_card[card_no]);
4983err_unmap:
4984 pci_iounmap(pdev, addr0);
4985 if (addr2)
4986 pci_iounmap(pdev, addr2);
4987err_reg:
4988 pci_release_regions(pdev);
4989err_dis:
4990 pci_disable_device(pdev);
4991err:
4992 return retval;
58936d8d 4993}
58936d8d 4994
6747cd93 4995static void __devexit cy_pci_remove(struct pci_dev *pdev)
58936d8d 4996{
38d09093 4997 struct cyclades_card *cinfo = pci_get_drvdata(pdev);
f3851e73 4998 unsigned int i;
38d09093 4999
85c93fa9 5000 /* non-Z with old PLX */
c2ad4c75
JS		 5001 if (!IS_CYC_Z(*cinfo) && (readb(cinfo->base_addr + CyPLX_VER) & 0x0f) ==
5002 PLX_9050)
85c93fa9
JS		 5003 cy_writeb(cinfo->ctl_addr + 0x4c, 0);
5004 else
5005#ifndef CONFIG_CYZ_INTR
c2ad4c75 5006 if (!IS_CYC_Z(*cinfo))
85c93fa9
JS		 5007#endif
5008 cy_writew(cinfo->ctl_addr + 0x68,
5009 readw(cinfo->ctl_addr + 0x68) & ~0x0900);
5010
38d09093
JS		 5011 pci_iounmap(pdev, cinfo->base_addr);
5012 if (cinfo->ctl_addr)
5013 pci_iounmap(pdev, cinfo->ctl_addr);
5014 if (cinfo->irq
5015#ifndef CONFIG_CYZ_INTR
c2ad4c75 5016 && !IS_CYC_Z(*cinfo)
38d09093
JS		 5017#endif /* CONFIG_CYZ_INTR */
5018 )
5019 free_irq(cinfo->irq, cinfo);
5020 pci_release_regions(pdev);
5021
5022 cinfo->base_addr = NULL;
6ad1ccc1
JS		 5023 for (i = cinfo->first_line; i < cinfo->first_line +
5024 cinfo->nports; i++)
5025 tty_unregister_device(cy_serial_driver, i);
dd025c0c
JS		 5026 cinfo->nports = 0;
5027 kfree(cinfo->ports);
38d09093
JS		 5028}
5029
6747cd93
JS		 5030static struct pci_driver cy_pci_driver = {
5031 .name = "cyclades",
5032 .id_table = cy_pci_dev_id,
5033 .probe = cy_pci_probe,
5034 .remove = __devexit_p(cy_pci_remove)
5035};
5036#endif
5037
02f1175c 5038static int
1da177e4 5039cyclades_get_proc_info(char *buf, char **start, off_t offset, int length,
02f1175c 5040 int *eof, void *data)
1da177e4 5041{
02f1175c 5042 struct cyclades_port *info;
dd025c0c 5043 unsigned int i, j;
02f1175c
JS		 5044 int len = 0;
5045 off_t begin = 0;
5046 off_t pos = 0;
5047 int size;
5048 __u32 cur_jifs = jiffies;
5049
5050 size = sprintf(buf, "Dev TimeOpen BytesOut IdleOut BytesIn "
5051 "IdleIn Overruns Ldisc\n");
5052
5053 pos += size;
1da177e4 5054 len += size;
1da177e4 5055
02f1175c 5056 /* Output one line for each known port */
dd025c0c
JS		 5057 for (i = 0; i < NR_CARDS; i++)
5058 for (j = 0; j < cy_card[i].nports; j++) {
5059 info = &cy_card[i].ports[j];
5060
5061 if (info->count)
5062 size = sprintf(buf + len, "%3d %8lu %10lu %8lu "
5063 "%10lu %8lu %9lu %6ld\n", info->line,
5064 (cur_jifs - info->idle_stats.in_use) /
5065 HZ, info->idle_stats.xmit_bytes,
5066 (cur_jifs - info->idle_stats.xmit_idle)/
5067 HZ, info->idle_stats.recv_bytes,
5068 (cur_jifs - info->idle_stats.recv_idle)/
5069 HZ, info->idle_stats.overruns,
5070 (long)info->tty->ldisc.num);
5071 else
5072 size = sprintf(buf + len, "%3d %8lu %10lu %8lu "
5073 "%10lu %8lu %9lu %6ld\n",
5074 info->line, 0L, 0L, 0L, 0L, 0L, 0L, 0L);
5075 len += size;
5076 pos = begin + len;
5077
5078 if (pos < offset) {
5079 len = 0;
5080 begin = pos;
5081 }
5082 if (pos > offset + length)
5083 goto done;
02f1175c 5084 }
02f1175c 5085 *eof = 1;
1da177e4 5086done:
02f1175c
JS		 5087 *start = buf + (offset - begin); /* Start of wanted data */
5088 len -= (offset - begin); /* Start slop */
5089 if (len > length)
5090 len = length; /* Ending slop */
5091 if (len < 0)
5092 len = 0;
5093 return len;
1da177e4
LT		 5094}
5095
5096/* The serial driver boot-time initialization code!
5097 Hardware I/O ports are mapped to character special devices on a
5098 first found, first allocated manner. That is, this code searches
5099 for Cyclom cards in the system. As each is found, it is probed
5100 to discover how many chips (and thus how many ports) are present.
5101 These ports are mapped to the tty ports 32 and upward in monotonic
5102 fashion. If an 8-port card is replaced with a 16-port card, the
5103 port mapping on a following card will shift.
5104
5105 This approach is different from what is used in the other serial
5106 device driver because the Cyclom is more properly a multiplexer,
5107 not just an aggregation of serial ports on one card.
5108
5109 If there are more cards with more ports than have been
5110 statically allocated above, a warning is printed and the
5111 extra ports are ignored.
5112 */
5113
b68e31d0 5114static const struct tty_operations cy_ops = {
02f1175c
JS		 5115 .open = cy_open,
5116 .close = cy_close,
5117 .write = cy_write,
5118 .put_char = cy_put_char,
5119 .flush_chars = cy_flush_chars,
5120 .write_room = cy_write_room,
5121 .chars_in_buffer = cy_chars_in_buffer,
5122 .flush_buffer = cy_flush_buffer,
5123 .ioctl = cy_ioctl,
5124 .throttle = cy_throttle,
5125 .unthrottle = cy_unthrottle,
5126 .set_termios = cy_set_termios,
5127 .stop = cy_stop,
5128 .start = cy_start,
5129 .hangup = cy_hangup,
5130 .break_ctl = cy_break,
5131 .wait_until_sent = cy_wait_until_sent,
5132 .read_proc = cyclades_get_proc_info,
5133 .tiocmget = cy_tiocmget,
5134 .tiocmset = cy_tiocmset,
1da177e4
LT		 5135};
5136
02f1175c 5137static int __init cy_init(void)
1da177e4 5138{
dd025c0c 5139 unsigned int nboards;
9dacf3b2 5140 int retval = -ENOMEM;
02f1175c
JS		 5141
5142 cy_serial_driver = alloc_tty_driver(NR_PORTS);
5143 if (!cy_serial_driver)
9dacf3b2 5144 goto err;
21719191
JS		 5145
5146 printk(KERN_INFO "Cyclades driver " CY_VERSION " (built %s %s)\n",
5147 __DATE__, __TIME__);
02f1175c
JS		 5148
5149 /* Initialize the tty_driver structure */
5150
5151 cy_serial_driver->owner = THIS_MODULE;
5152 cy_serial_driver->driver_name = "cyclades";
5153 cy_serial_driver->name = "ttyC";
5154 cy_serial_driver->major = CYCLADES_MAJOR;
5155 cy_serial_driver->minor_start = 0;
5156 cy_serial_driver->type = TTY_DRIVER_TYPE_SERIAL;
5157 cy_serial_driver->subtype = SERIAL_TYPE_NORMAL;
5158 cy_serial_driver->init_termios = tty_std_termios;
5159 cy_serial_driver->init_termios.c_cflag =
5160 B9600 | CS8 | CREAD | HUPCL | CLOCAL;
6ad1ccc1 5161 cy_serial_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
02f1175c
JS		 5162 tty_set_operations(cy_serial_driver, &cy_ops);
5163
9dacf3b2
JS		 5164 retval = tty_register_driver(cy_serial_driver);
5165 if (retval) {
5166 printk(KERN_ERR "Couldn't register Cyclades serial driver\n");
5167 goto err_frtty;
5168 }
02f1175c 5169
02f1175c
JS		 5170 /* the code below is responsible to find the boards. Each different
5171 type of board has its own detection routine. If a board is found,
5172 the next cy_card structure available is set by the detection
5173 routine. These functions are responsible for checking the
5174 availability of cy_card and cy_port data structures and updating
5175 the cy_next_channel. */
5176
5177 /* look for isa boards */
14a55a67 5178 nboards = cy_detect_isa();
02f1175c 5179
6747cd93 5180#ifdef CONFIG_PCI
02f1175c 5181 /* look for pci boards */
6747cd93
JS		 5182 retval = pci_register_driver(&cy_pci_driver);
5183 if (retval && !nboards)
9dacf3b2 5184 goto err_unr;
6747cd93 5185#endif
9dacf3b2
JS		 5186
5187 return 0;
5188err_unr:
5189 tty_unregister_driver(cy_serial_driver);
5190err_frtty:
5191 put_tty_driver(cy_serial_driver);
5192err:
5193 return retval;
02f1175c 5194} /* cy_init */
1da177e4 5195
02f1175c 5196static void __exit cy_cleanup_module(void)
1da177e4 5197{
dd025c0c 5198 struct cyclades_card *card;
02f1175c 5199 int i, e1;
1da177e4
LT		 5200
5201#ifndef CONFIG_CYZ_INTR
b7050906 5202 del_timer_sync(&cyz_timerlist);
1da177e4
LT		 5203#endif /* CONFIG_CYZ_INTR */
5204
02f1175c 5205 if ((e1 = tty_unregister_driver(cy_serial_driver)))
21719191
JS		 5206 printk(KERN_ERR "failed to unregister Cyclades serial "
5207 "driver(%d)\n", e1);
1da177e4 5208
6747cd93
JS		 5209#ifdef CONFIG_PCI
5210 pci_unregister_driver(&cy_pci_driver);
5211#endif
5212
02f1175c 5213 for (i = 0; i < NR_CARDS; i++) {
dd025c0c
JS		 5214 card = &cy_card[i];
5215 if (card->base_addr) {
85c93fa9 5216 /* clear interrupt */
dd025c0c
JS		 5217 cy_writeb(card->base_addr + Cy_ClrIntr, 0);
5218 iounmap(card->base_addr);
5219 if (card->ctl_addr)
5220 iounmap(card->ctl_addr);
5221 if (card->irq
1da177e4 5222#ifndef CONFIG_CYZ_INTR
dd025c0c 5223 && !IS_CYC_Z(*card)
1da177e4 5224#endif /* CONFIG_CYZ_INTR */
02f1175c 5225 )
dd025c0c
JS		 5226 free_irq(card->irq, card);
5227 for (e1 = card->first_line;
5228 e1 < card->first_line +
5229 card->nports; e1++)
6ad1ccc1 5230 tty_unregister_device(cy_serial_driver, e1);
dd025c0c 5231 kfree(card->ports);
02f1175c
JS		 5232 }
5233 }
f2462bfe
JS		 5234
5235 put_tty_driver(cy_serial_driver);
1da177e4
LT		 5236} /* cy_cleanup_module */
5237
5238module_init(cy_init);
5239module_exit(cy_cleanup_module);
5240
5241MODULE_LICENSE("GPL");
c8e1693a 5242MODULE_VERSION(CY_VERSION);
kernel source for telekom puls (alcatel/mediatek)