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Char: cyclades, remove bottom half processing
[deliverable/linux.git] / drivers / char / cyclades.c
1 #undef BLOCKMOVE
2 #define Z_WAKE
3 #undef Z_EXT_CHARS_IN_BUFFER
4
5 /*
6 * linux/drivers/char/cyclades.c
7 *
8 * This file contains the driver for the Cyclades async multiport
9 * serial boards.
10 *
11 * Initially written by Randolph Bentson <bentson@grieg.seaslug.org>.
12 * Modified and maintained by Marcio Saito <marcio@cyclades.com>.
13 *
14 * Copyright (C) 2007 Jiri Slaby <jirislaby@gmail.com>
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.
20 * Converted to pci probing and cleaned up by Jiri Slaby.
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;
281 * fix race condition in -Z buffer management; only -Y needs to explicitly
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
593 #define CY_VERSION "2.5"
594
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
599 #define NR_CARDS 4
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
606 #define NR_PORTS 256
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
626 /*
627 * Include section
628 */
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>
636 #include <linux/tty_flip.h>
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 #include <linux/firmware.h>
650
651 #include <asm/system.h>
652 #include <asm/io.h>
653 #include <asm/irq.h>
654 #include <asm/uaccess.h>
655
656 #include <linux/kernel.h>
657 #include <linux/pci.h>
658
659 #include <linux/stat.h>
660 #include <linux/proc_fs.h>
661
662 static void cy_throttle(struct tty_struct *tty);
663 static void cy_send_xchar(struct tty_struct *tty, char ch);
664
665 #define IS_CYC_Z(card) ((card).num_chips == -1)
666
667 #define Z_FPGA_CHECK(card) \
668 ((readl(&((struct RUNTIME_9060 __iomem *) \
669 ((card).ctl_addr))->init_ctrl) & (1<<17)) != 0)
670
671 #define ISZLOADED(card) (((ZO_V1==readl(&((struct RUNTIME_9060 __iomem *) \
672 ((card).ctl_addr))->mail_box_0)) || \
673 Z_FPGA_CHECK(card)) && \
674 (ZFIRM_ID==readl(&((struct FIRM_ID __iomem *) \
675 ((card).base_addr+ID_ADDRESS))->signature)))
676
677 #ifndef SERIAL_XMIT_SIZE
678 #define SERIAL_XMIT_SIZE (min(PAGE_SIZE, 4096))
679 #endif
680 #define WAKEUP_CHARS 256
681
682 #define STD_COM_FLAGS (0)
683
684 /* firmware stuff */
685 #define ZL_MAX_BLOCKS 16
686 #define DRIVER_VERSION 0x02010203
687 #define RAM_SIZE 0x80000
688
689 #define Z_FPGA_LOADED(X) ((readl(&(X)->init_ctrl) & (1<<17)) != 0)
690
691 enum zblock_type {
692 ZBLOCK_PRG = 0,
693 ZBLOCK_FPGA = 1
694 };
695
696 struct zfile_header {
697 char name[64];
698 char date[32];
699 char aux[32];
700 u32 n_config;
701 u32 config_offset;
702 u32 n_blocks;
703 u32 block_offset;
704 u32 reserved[9];
705 } __attribute__ ((packed));
706
707 struct zfile_config {
708 char name[64];
709 u32 mailbox;
710 u32 function;
711 u32 n_blocks;
712 u32 block_list[ZL_MAX_BLOCKS];
713 } __attribute__ ((packed));
714
715 struct zfile_block {
716 u32 type;
717 u32 file_offset;
718 u32 ram_offset;
719 u32 size;
720 } __attribute__ ((packed));
721
722 static struct tty_driver *cy_serial_driver;
723
724 #ifdef CONFIG_ISA
725 /* This is the address lookup table. The driver will probe for
726 Cyclom-Y/ISA boards at all addresses in here. If you want the
727 driver to probe addresses at a different address, add it to
728 this table. If the driver is probing some other board and
729 causing problems, remove the offending address from this table.
730 The cy_setup function extracts additional addresses from the
731 boot options line. The form is "cyclades=address,address..."
732 */
733
734 static unsigned int cy_isa_addresses[] = {
735 0xD0000,
736 0xD2000,
737 0xD4000,
738 0xD6000,
739 0xD8000,
740 0xDA000,
741 0xDC000,
742 0xDE000,
743 0, 0, 0, 0, 0, 0, 0, 0
744 };
745
746 #define NR_ISA_ADDRS ARRAY_SIZE(cy_isa_addresses)
747
748 #ifdef MODULE
749 static long maddr[NR_CARDS];
750 static int irq[NR_CARDS];
751
752 module_param_array(maddr, long, NULL, 0);
753 module_param_array(irq, int, NULL, 0);
754 #endif
755
756 #endif /* CONFIG_ISA */
757
758 /* This is the per-card data structure containing address, irq, number of
759 channels, etc. This driver supports a maximum of NR_CARDS cards.
760 */
761 static struct cyclades_card cy_card[NR_CARDS];
762
763 static int cy_next_channel; /* next minor available */
764
765 /*
766 * This is used to look up the divisor speeds and the timeouts
767 * We're normally limited to 15 distinct baud rates. The extra
768 * are accessed via settings in info->flags.
769 * 0, 1, 2, 3, 4, 5, 6, 7, 8, 9,
770 * 10, 11, 12, 13, 14, 15, 16, 17, 18, 19,
771 * HI VHI
772 * 20
773 */
774 static int baud_table[] = {
775 0, 50, 75, 110, 134, 150, 200, 300, 600, 1200,
776 1800, 2400, 4800, 9600, 19200, 38400, 57600, 76800, 115200, 150000,
777 230400, 0
778 };
779
780 static char baud_co_25[] = { /* 25 MHz clock option table */
781 /* value => 00 01 02 03 04 */
782 /* divide by 8 32 128 512 2048 */
783 0x00, 0x04, 0x04, 0x04, 0x04, 0x04, 0x03, 0x03, 0x03, 0x02,
784 0x02, 0x02, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
785 };
786
787 static char baud_bpr_25[] = { /* 25 MHz baud rate period table */
788 0x00, 0xf5, 0xa3, 0x6f, 0x5c, 0x51, 0xf5, 0xa3, 0x51, 0xa3,
789 0x6d, 0x51, 0xa3, 0x51, 0xa3, 0x51, 0x36, 0x29, 0x1b, 0x15
790 };
791
792 static char baud_co_60[] = { /* 60 MHz clock option table (CD1400 J) */
793 /* value => 00 01 02 03 04 */
794 /* divide by 8 32 128 512 2048 */
795 0x00, 0x00, 0x00, 0x04, 0x04, 0x04, 0x04, 0x04, 0x03, 0x03,
796 0x03, 0x02, 0x02, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00,
797 0x00
798 };
799
800 static char baud_bpr_60[] = { /* 60 MHz baud rate period table (CD1400 J) */
801 0x00, 0x82, 0x21, 0xff, 0xdb, 0xc3, 0x92, 0x62, 0xc3, 0x62,
802 0x41, 0xc3, 0x62, 0xc3, 0x62, 0xc3, 0x82, 0x62, 0x41, 0x32,
803 0x21
804 };
805
806 static char baud_cor3[] = { /* receive threshold */
807 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a,
808 0x0a, 0x0a, 0x0a, 0x09, 0x09, 0x08, 0x08, 0x08, 0x08, 0x07,
809 0x07
810 };
811
812 /*
813 * The Cyclades driver implements HW flow control as any serial driver.
814 * The cyclades_port structure member rflow and the vector rflow_thr
815 * allows us to take advantage of a special feature in the CD1400 to avoid
816 * data loss even when the system interrupt latency is too high. These flags
817 * are to be used only with very special applications. Setting these flags
818 * requires the use of a special cable (DTR and RTS reversed). In the new
819 * CD1400-based boards (rev. 6.00 or later), there is no need for special
820 * cables.
821 */
822
823 static char rflow_thr[] = { /* rflow threshold */
824 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
825 0x00, 0x00, 0x00, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a,
826 0x0a
827 };
828
829 /* The Cyclom-Ye has placed the sequential chips in non-sequential
830 * address order. This look-up table overcomes that problem.
831 */
832 static int cy_chip_offset[] = { 0x0000,
833 0x0400,
834 0x0800,
835 0x0C00,
836 0x0200,
837 0x0600,
838 0x0A00,
839 0x0E00
840 };
841
842 /* PCI related definitions */
843
844 #ifdef CONFIG_PCI
845 static struct pci_device_id cy_pci_dev_id[] __devinitdata = {
846 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Y_Lo) }, /* PCI < 1Mb */
847 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Y_Hi) }, /* PCI > 1Mb */
848 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_4Y_Lo) }, /* 4Y PCI < 1Mb */
849 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_4Y_Hi) }, /* 4Y PCI > 1Mb */
850 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_8Y_Lo) }, /* 8Y PCI < 1Mb */
851 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_8Y_Hi) }, /* 8Y PCI > 1Mb */
852 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Z_Lo) }, /* Z PCI < 1Mb */
853 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Z_Hi) }, /* Z PCI > 1Mb */
854 { } /* end of table */
855 };
856 MODULE_DEVICE_TABLE(pci, cy_pci_dev_id);
857 #endif
858
859 static void cy_start(struct tty_struct *);
860 static void set_line_char(struct cyclades_port *);
861 static int cyz_issue_cmd(struct cyclades_card *, __u32, __u8, __u32);
862 #ifdef CONFIG_ISA
863 static unsigned detect_isa_irq(void __iomem *);
864 #endif /* CONFIG_ISA */
865
866 static int cyclades_get_proc_info(char *, char **, off_t, int, int *, void *);
867
868 #ifndef CONFIG_CYZ_INTR
869 static void cyz_poll(unsigned long);
870
871 /* The Cyclades-Z polling cycle is defined by this variable */
872 static long cyz_polling_cycle = CZ_DEF_POLL;
873
874 static DEFINE_TIMER(cyz_timerlist, cyz_poll, 0, 0);
875
876 #else /* CONFIG_CYZ_INTR */
877 static void cyz_rx_restart(unsigned long);
878 static struct timer_list cyz_rx_full_timer[NR_PORTS];
879 #endif /* CONFIG_CYZ_INTR */
880
881 static inline int serial_paranoia_check(struct cyclades_port *info,
882 char *name, const char *routine)
883 {
884 #ifdef SERIAL_PARANOIA_CHECK
885 if (!info) {
886 printk(KERN_WARNING "cyc Warning: null cyclades_port for (%s) "
887 "in %s\n", name, routine);
888 return 1;
889 }
890
891 if (info->magic != CYCLADES_MAGIC) {
892 printk(KERN_WARNING "cyc Warning: bad magic number for serial "
893 "struct (%s) in %s\n", name, routine);
894 return 1;
895 }
896 #endif
897 return 0;
898 } /* serial_paranoia_check */
899
900 /***********************************************************/
901 /********* Start of block of Cyclom-Y specific code ********/
902
903 /* This routine waits up to 1000 micro-seconds for the previous
904 command to the Cirrus chip to complete and then issues the
905 new command. An error is returned if the previous command
906 didn't finish within the time limit.
907
908 This function is only called from inside spinlock-protected code.
909 */
910 static int cyy_issue_cmd(void __iomem * base_addr, u_char cmd, int index)
911 {
912 unsigned int i;
913
914 /* Check to see that the previous command has completed */
915 for (i = 0; i < 100; i++) {
916 if (readb(base_addr + (CyCCR << index)) == 0) {
917 break;
918 }
919 udelay(10L);
920 }
921 /* if the CCR never cleared, the previous command
922 didn't finish within the "reasonable time" */
923 if (i == 100)
924 return -1;
925
926 /* Issue the new command */
927 cy_writeb(base_addr + (CyCCR << index), cmd);
928
929 return 0;
930 } /* cyy_issue_cmd */
931
932 #ifdef CONFIG_ISA
933 /* ISA interrupt detection code */
934 static unsigned detect_isa_irq(void __iomem * address)
935 {
936 int irq;
937 unsigned long irqs, flags;
938 int save_xir, save_car;
939 int index = 0; /* IRQ probing is only for ISA */
940
941 /* forget possible initially masked and pending IRQ */
942 irq = probe_irq_off(probe_irq_on());
943
944 /* Clear interrupts on the board first */
945 cy_writeb(address + (Cy_ClrIntr << index), 0);
946 /* Cy_ClrIntr is 0x1800 */
947
948 irqs = probe_irq_on();
949 /* Wait ... */
950 udelay(5000L);
951
952 /* Enable the Tx interrupts on the CD1400 */
953 local_irq_save(flags);
954 cy_writeb(address + (CyCAR << index), 0);
955 cyy_issue_cmd(address, CyCHAN_CTL | CyENB_XMTR, index);
956
957 cy_writeb(address + (CyCAR << index), 0);
958 cy_writeb(address + (CySRER << index),
959 readb(address + (CySRER << index)) | CyTxRdy);
960 local_irq_restore(flags);
961
962 /* Wait ... */
963 udelay(5000L);
964
965 /* Check which interrupt is in use */
966 irq = probe_irq_off(irqs);
967
968 /* Clean up */
969 save_xir = (u_char) readb(address + (CyTIR << index));
970 save_car = readb(address + (CyCAR << index));
971 cy_writeb(address + (CyCAR << index), (save_xir & 0x3));
972 cy_writeb(address + (CySRER << index),
973 readb(address + (CySRER << index)) & ~CyTxRdy);
974 cy_writeb(address + (CyTIR << index), (save_xir & 0x3f));
975 cy_writeb(address + (CyCAR << index), (save_car));
976 cy_writeb(address + (Cy_ClrIntr << index), 0);
977 /* Cy_ClrIntr is 0x1800 */
978
979 return (irq > 0) ? irq : 0;
980 }
981 #endif /* CONFIG_ISA */
982
983 static void cyy_intr_chip(struct cyclades_card *cinfo, int chip,
984 void __iomem * base_addr, int status, int index)
985 {
986 struct cyclades_port *info;
987 struct tty_struct *tty;
988 int char_count;
989 int j, len, mdm_change, mdm_status, outch;
990 int save_xir, channel, save_car;
991 char data;
992
993 if (status & CySRReceive) { /* reception interrupt */
994 #ifdef CY_DEBUG_INTERRUPTS
995 printk(KERN_DEBUG "cyy_interrupt: rcvd intr, chip %d\n", chip);
996 #endif
997 /* determine the channel & change to that context */
998 spin_lock(&cinfo->card_lock);
999 save_xir = (u_char) readb(base_addr + (CyRIR << index));
1000 channel = (u_short) (save_xir & CyIRChannel);
1001 info = &cinfo->ports[channel + chip * 4];
1002 save_car = readb(base_addr + (CyCAR << index));
1003 cy_writeb(base_addr + (CyCAR << index), save_xir);
1004
1005 /* if there is nowhere to put the data, discard it */
1006 if (info->tty == NULL) {
1007 j = (readb(base_addr + (CyRIVR << index)) &
1008 CyIVRMask);
1009 if (j == CyIVRRxEx) { /* exception */
1010 data = readb(base_addr + (CyRDSR << index));
1011 } else { /* normal character reception */
1012 char_count = readb(base_addr +
1013 (CyRDCR << index));
1014 while (char_count--) {
1015 data = readb(base_addr +
1016 (CyRDSR << index));
1017 }
1018 }
1019 } else { /* there is an open port for this data */
1020 tty = info->tty;
1021 j = (readb(base_addr + (CyRIVR << index)) &
1022 CyIVRMask);
1023 if (j == CyIVRRxEx) { /* exception */
1024 data = readb(base_addr + (CyRDSR << index));
1025
1026 /* For statistics only */
1027 if (data & CyBREAK)
1028 info->icount.brk++;
1029 else if (data & CyFRAME)
1030 info->icount.frame++;
1031 else if (data & CyPARITY)
1032 info->icount.parity++;
1033 else if (data & CyOVERRUN)
1034 info->icount.overrun++;
1035
1036 if (data & info->ignore_status_mask) {
1037 info->icount.rx++;
1038 spin_unlock(&cinfo->card_lock);
1039 return;
1040 }
1041 if (tty_buffer_request_room(tty, 1)) {
1042 if (data & info->read_status_mask) {
1043 if (data & CyBREAK) {
1044 tty_insert_flip_char(
1045 tty,
1046 readb(
1047 base_addr +
1048 (CyRDSR <<
1049 index)),
1050 TTY_BREAK);
1051 info->icount.rx++;
1052 if (info->flags &
1053 ASYNC_SAK) {
1054 do_SAK(tty);
1055 }
1056 } else if (data & CyFRAME) {
1057 tty_insert_flip_char(
1058 tty,
1059 readb(
1060 base_addr +
1061 (CyRDSR <<
1062 index)),
1063 TTY_FRAME);
1064 info->icount.rx++;
1065 info->idle_stats.
1066 frame_errs++;
1067 } else if (data & CyPARITY) {
1068 /* Pieces of seven... */
1069 tty_insert_flip_char(
1070 tty,
1071 readb(
1072 base_addr +
1073 (CyRDSR <<
1074 index)),
1075 TTY_PARITY);
1076 info->icount.rx++;
1077 info->idle_stats.
1078 parity_errs++;
1079 } else if (data & CyOVERRUN) {
1080 tty_insert_flip_char(
1081 tty, 0,
1082 TTY_OVERRUN);
1083 info->icount.rx++;
1084 /* If the flip buffer itself is
1085 overflowing, we still lose
1086 the next incoming character.
1087 */
1088 tty_insert_flip_char(
1089 tty,
1090 readb(
1091 base_addr +
1092 (CyRDSR <<
1093 index)),
1094 TTY_FRAME);
1095 info->icount.rx++;
1096 info->idle_stats.
1097 overruns++;
1098 /* These two conditions may imply */
1099 /* a normal read should be done. */
1100 /* }else if(data & CyTIMEOUT){ */
1101 /* }else if(data & CySPECHAR){ */
1102 } else {
1103 tty_insert_flip_char(
1104 tty, 0,
1105 TTY_NORMAL);
1106 info->icount.rx++;
1107 }
1108 } else {
1109 tty_insert_flip_char(tty, 0,
1110 TTY_NORMAL);
1111 info->icount.rx++;
1112 }
1113 } else {
1114 /* there was a software buffer
1115 overrun and nothing could be
1116 done about it!!! */
1117 info->icount.buf_overrun++;
1118 info->idle_stats.overruns++;
1119 }
1120 } else { /* normal character reception */
1121 /* load # chars available from the chip */
1122 char_count = readb(base_addr +
1123 (CyRDCR << index));
1124
1125 #ifdef CY_ENABLE_MONITORING
1126 ++info->mon.int_count;
1127 info->mon.char_count += char_count;
1128 if (char_count > info->mon.char_max)
1129 info->mon.char_max = char_count;
1130 info->mon.char_last = char_count;
1131 #endif
1132 len = tty_buffer_request_room(tty, char_count);
1133 while (len--) {
1134 data = readb(base_addr +
1135 (CyRDSR << index));
1136 tty_insert_flip_char(tty, data,
1137 TTY_NORMAL);
1138 info->idle_stats.recv_bytes++;
1139 info->icount.rx++;
1140 #ifdef CY_16Y_HACK
1141 udelay(10L);
1142 #endif
1143 }
1144 info->idle_stats.recv_idle = jiffies;
1145 }
1146 tty_schedule_flip(tty);
1147 }
1148 /* end of service */
1149 cy_writeb(base_addr + (CyRIR << index), (save_xir & 0x3f));
1150 cy_writeb(base_addr + (CyCAR << index), (save_car));
1151 spin_unlock(&cinfo->card_lock);
1152 }
1153
1154 if (status & CySRTransmit) { /* transmission interrupt */
1155 /* Since we only get here when the transmit buffer
1156 is empty, we know we can always stuff a dozen
1157 characters. */
1158 #ifdef CY_DEBUG_INTERRUPTS
1159 printk(KERN_DEBUG "cyy_interrupt: xmit intr, chip %d\n", chip);
1160 #endif
1161
1162 /* determine the channel & change to that context */
1163 spin_lock(&cinfo->card_lock);
1164 save_xir = (u_char) readb(base_addr + (CyTIR << index));
1165 channel = (u_short) (save_xir & CyIRChannel);
1166 save_car = readb(base_addr + (CyCAR << index));
1167 cy_writeb(base_addr + (CyCAR << index), save_xir);
1168
1169 /* validate the port# (as configured and open) */
1170 if (channel + chip * 4 >= cinfo->nports) {
1171 cy_writeb(base_addr + (CySRER << index),
1172 readb(base_addr + (CySRER << index)) &
1173 ~CyTxRdy);
1174 goto txend;
1175 }
1176 info = &cinfo->ports[channel + chip * 4];
1177 if (info->tty == NULL) {
1178 cy_writeb(base_addr + (CySRER << index),
1179 readb(base_addr + (CySRER << index)) &
1180 ~CyTxRdy);
1181 goto txend;
1182 }
1183
1184 /* load the on-chip space for outbound data */
1185 char_count = info->xmit_fifo_size;
1186
1187 if (info->x_char) { /* send special char */
1188 outch = info->x_char;
1189 cy_writeb(base_addr + (CyTDR << index), outch);
1190 char_count--;
1191 info->icount.tx++;
1192 info->x_char = 0;
1193 }
1194
1195 if (info->breakon || info->breakoff) {
1196 if (info->breakon) {
1197 cy_writeb(base_addr + (CyTDR << index), 0);
1198 cy_writeb(base_addr + (CyTDR << index), 0x81);
1199 info->breakon = 0;
1200 char_count -= 2;
1201 }
1202 if (info->breakoff) {
1203 cy_writeb(base_addr + (CyTDR << index), 0);
1204 cy_writeb(base_addr + (CyTDR << index), 0x83);
1205 info->breakoff = 0;
1206 char_count -= 2;
1207 }
1208 }
1209
1210 while (char_count-- > 0) {
1211 if (!info->xmit_cnt) {
1212 if (readb(base_addr + (CySRER << index)) &
1213 CyTxMpty) {
1214 cy_writeb(base_addr + (CySRER << index),
1215 readb(base_addr +
1216 (CySRER << index)) &
1217 ~CyTxMpty);
1218 } else {
1219 cy_writeb(base_addr + (CySRER << index),
1220 (readb(base_addr +
1221 (CySRER << index)) &
1222 ~CyTxRdy) | CyTxMpty);
1223 }
1224 goto txdone;
1225 }
1226 if (info->xmit_buf == NULL) {
1227 cy_writeb(base_addr + (CySRER << index),
1228 readb(base_addr + (CySRER << index)) &
1229 ~CyTxRdy);
1230 goto txdone;
1231 }
1232 if (info->tty->stopped || info->tty->hw_stopped) {
1233 cy_writeb(base_addr + (CySRER << index),
1234 readb(base_addr + (CySRER << index)) &
1235 ~CyTxRdy);
1236 goto txdone;
1237 }
1238 /* Because the Embedded Transmit Commands have
1239 been enabled, we must check to see if the
1240 escape character, NULL, is being sent. If it
1241 is, we must ensure that there is room for it
1242 to be doubled in the output stream. Therefore
1243 we no longer advance the pointer when the
1244 character is fetched, but rather wait until
1245 after the check for a NULL output character.
1246 This is necessary because there may not be
1247 room for the two chars needed to send a NULL.)
1248 */
1249 outch = info->xmit_buf[info->xmit_tail];
1250 if (outch) {
1251 info->xmit_cnt--;
1252 info->xmit_tail = (info->xmit_tail + 1) &
1253 (SERIAL_XMIT_SIZE - 1);
1254 cy_writeb(base_addr + (CyTDR << index), outch);
1255 info->icount.tx++;
1256 } else {
1257 if (char_count > 1) {
1258 info->xmit_cnt--;
1259 info->xmit_tail = (info->xmit_tail + 1)&
1260 (SERIAL_XMIT_SIZE - 1);
1261 cy_writeb(base_addr + (CyTDR << index),
1262 outch);
1263 cy_writeb(base_addr + (CyTDR << index),
1264 0);
1265 info->icount.tx++;
1266 char_count--;
1267 }
1268 }
1269 }
1270
1271 txdone:
1272 tty_wakeup(info->tty);
1273 txend:
1274 /* end of service */
1275 cy_writeb(base_addr + (CyTIR << index), (save_xir & 0x3f));
1276 cy_writeb(base_addr + (CyCAR << index), (save_car));
1277 spin_unlock(&cinfo->card_lock);
1278 }
1279
1280 if (status & CySRModem) { /* modem interrupt */
1281
1282 /* determine the channel & change to that context */
1283 spin_lock(&cinfo->card_lock);
1284 save_xir = (u_char) readb(base_addr + (CyMIR << index));
1285 channel = (u_short) (save_xir & CyIRChannel);
1286 info = &cinfo->ports[channel + chip * 4];
1287 save_car = readb(base_addr + (CyCAR << index));
1288 cy_writeb(base_addr + (CyCAR << index), save_xir);
1289
1290 mdm_change = readb(base_addr + (CyMISR << index));
1291 mdm_status = readb(base_addr + (CyMSVR1 << index));
1292
1293 if (info->tty) {
1294 if (mdm_change & CyANY_DELTA) {
1295 /* For statistics only */
1296 if (mdm_change & CyDCD)
1297 info->icount.dcd++;
1298 if (mdm_change & CyCTS)
1299 info->icount.cts++;
1300 if (mdm_change & CyDSR)
1301 info->icount.dsr++;
1302 if (mdm_change & CyRI)
1303 info->icount.rng++;
1304
1305 wake_up_interruptible(&info->delta_msr_wait);
1306 }
1307
1308 if ((mdm_change & CyDCD) &&
1309 (info->flags & ASYNC_CHECK_CD)) {
1310 if (!(mdm_status & CyDCD)) {
1311 tty_hangup(info->tty);
1312 info->flags &= ~ASYNC_NORMAL_ACTIVE;
1313 }
1314 wake_up_interruptible(&info->open_wait);
1315 }
1316 if ((mdm_change & CyCTS) &&
1317 (info->flags & ASYNC_CTS_FLOW)) {
1318 if (info->tty->hw_stopped) {
1319 if (mdm_status & CyCTS) {
1320 /* cy_start isn't used
1321 because... !!! */
1322 info->tty->hw_stopped = 0;
1323 cy_writeb(base_addr +
1324 (CySRER << index),
1325 readb(base_addr +
1326 (CySRER <<
1327 index))|
1328 CyTxRdy);
1329 tty_wakeup(info->tty);
1330 }
1331 } else {
1332 if (!(mdm_status & CyCTS)) {
1333 /* cy_stop isn't used
1334 because ... !!! */
1335 info->tty->hw_stopped = 1;
1336 cy_writeb(base_addr +
1337 (CySRER << index),
1338 readb(base_addr +
1339 (CySRER <<
1340 index)) &
1341 ~CyTxRdy);
1342 }
1343 }
1344 }
1345 /* if (mdm_change & CyDSR) {
1346 }
1347 if (mdm_change & CyRI) {
1348 }*/
1349 }
1350 /* end of service */
1351 cy_writeb(base_addr + (CyMIR << index), (save_xir & 0x3f));
1352 cy_writeb(base_addr + (CyCAR << index), save_car);
1353 spin_unlock(&cinfo->card_lock);
1354 }
1355 }
1356
1357 /* The real interrupt service routine is called
1358 whenever the card wants its hand held--chars
1359 received, out buffer empty, modem change, etc.
1360 */
1361 static irqreturn_t cyy_interrupt(int irq, void *dev_id)
1362 {
1363 int status;
1364 struct cyclades_card *cinfo = dev_id;
1365 void __iomem *base_addr, *card_base_addr;
1366 int chip;
1367 int index;
1368 int too_many;
1369 int had_work;
1370
1371 if (unlikely(cinfo == NULL)) {
1372 #ifdef CY_DEBUG_INTERRUPTS
1373 printk(KERN_DEBUG "cyy_interrupt: spurious interrupt %d\n",irq);
1374 #endif
1375 return IRQ_NONE; /* spurious interrupt */
1376 }
1377
1378 card_base_addr = cinfo->base_addr;
1379 index = cinfo->bus_index;
1380
1381 /* card was not initialized yet (e.g. DEBUG_SHIRQ) */
1382 if (unlikely(card_base_addr == NULL))
1383 return IRQ_HANDLED;
1384
1385 /* This loop checks all chips in the card. Make a note whenever
1386 _any_ chip had some work to do, as this is considered an
1387 indication that there will be more to do. Only when no chip
1388 has any work does this outermost loop exit.
1389 */
1390 do {
1391 had_work = 0;
1392 for (chip = 0; chip < cinfo->num_chips; chip++) {
1393 base_addr = cinfo->base_addr +
1394 (cy_chip_offset[chip] << index);
1395 too_many = 0;
1396 while ((status = readb(base_addr +
1397 (CySVRR << index))) != 0x00) {
1398 had_work++;
1399 /* The purpose of the following test is to ensure that
1400 no chip can monopolize the driver. This forces the
1401 chips to be checked in a round-robin fashion (after
1402 draining each of a bunch (1000) of characters).
1403 */
1404 if (1000 < too_many++) {
1405 break;
1406 }
1407 cyy_intr_chip(cinfo, chip, base_addr, status,
1408 index);
1409 }
1410 }
1411 } while (had_work);
1412
1413 /* clear interrupts */
1414 spin_lock(&cinfo->card_lock);
1415 cy_writeb(card_base_addr + (Cy_ClrIntr << index), 0);
1416 /* Cy_ClrIntr is 0x1800 */
1417 spin_unlock(&cinfo->card_lock);
1418 return IRQ_HANDLED;
1419 } /* cyy_interrupt */
1420
1421 /***********************************************************/
1422 /********* End of block of Cyclom-Y specific code **********/
1423 /******** Start of block of Cyclades-Z specific code *********/
1424 /***********************************************************/
1425
1426 static int
1427 cyz_fetch_msg(struct cyclades_card *cinfo,
1428 __u32 * channel, __u8 * cmd, __u32 * param)
1429 {
1430 struct FIRM_ID __iomem *firm_id;
1431 struct ZFW_CTRL __iomem *zfw_ctrl;
1432 struct BOARD_CTRL __iomem *board_ctrl;
1433 unsigned long loc_doorbell;
1434
1435 firm_id = cinfo->base_addr + ID_ADDRESS;
1436 if (!ISZLOADED(*cinfo)) {
1437 return -1;
1438 }
1439 zfw_ctrl = cinfo->base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
1440 board_ctrl = &zfw_ctrl->board_ctrl;
1441
1442 loc_doorbell = readl(&((struct RUNTIME_9060 __iomem *)
1443 (cinfo->ctl_addr))->loc_doorbell);
1444 if (loc_doorbell) {
1445 *cmd = (char)(0xff & loc_doorbell);
1446 *channel = readl(&board_ctrl->fwcmd_channel);
1447 *param = (__u32) readl(&board_ctrl->fwcmd_param);
1448 cy_writel(&((struct RUNTIME_9060 __iomem *)(cinfo->ctl_addr))->
1449 loc_doorbell, 0xffffffff);
1450 return 1;
1451 }
1452 return 0;
1453 } /* cyz_fetch_msg */
1454
1455 static int
1456 cyz_issue_cmd(struct cyclades_card *cinfo,
1457 __u32 channel, __u8 cmd, __u32 param)
1458 {
1459 struct FIRM_ID __iomem *firm_id;
1460 struct ZFW_CTRL __iomem *zfw_ctrl;
1461 struct BOARD_CTRL __iomem *board_ctrl;
1462 __u32 __iomem *pci_doorbell;
1463 int index;
1464
1465 firm_id = cinfo->base_addr + ID_ADDRESS;
1466 if (!ISZLOADED(*cinfo)) {
1467 return -1;
1468 }
1469 zfw_ctrl = cinfo->base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
1470 board_ctrl = &zfw_ctrl->board_ctrl;
1471
1472 index = 0;
1473 pci_doorbell =
1474 &((struct RUNTIME_9060 __iomem *)(cinfo->ctl_addr))->pci_doorbell;
1475 while ((readl(pci_doorbell) & 0xff) != 0) {
1476 if (index++ == 1000) {
1477 return (int)(readl(pci_doorbell) & 0xff);
1478 }
1479 udelay(50L);
1480 }
1481 cy_writel(&board_ctrl->hcmd_channel, channel);
1482 cy_writel(&board_ctrl->hcmd_param, param);
1483 cy_writel(pci_doorbell, (long)cmd);
1484
1485 return 0;
1486 } /* cyz_issue_cmd */
1487
1488 static void
1489 cyz_handle_rx(struct cyclades_port *info, struct CH_CTRL __iomem *ch_ctrl,
1490 struct BUF_CTRL __iomem *buf_ctrl)
1491 {
1492 struct cyclades_card *cinfo = info->card;
1493 struct tty_struct *tty = info->tty;
1494 int char_count;
1495 int len;
1496 #ifdef BLOCKMOVE
1497 unsigned char *buf;
1498 #else
1499 char data;
1500 #endif
1501 __u32 rx_put, rx_get, new_rx_get, rx_bufsize, rx_bufaddr;
1502
1503 rx_get = new_rx_get = readl(&buf_ctrl->rx_get);
1504 rx_put = readl(&buf_ctrl->rx_put);
1505 rx_bufsize = readl(&buf_ctrl->rx_bufsize);
1506 rx_bufaddr = readl(&buf_ctrl->rx_bufaddr);
1507 if (rx_put >= rx_get)
1508 char_count = rx_put - rx_get;
1509 else
1510 char_count = rx_put - rx_get + rx_bufsize;
1511
1512 if (char_count) {
1513 #ifdef CY_ENABLE_MONITORING
1514 info->mon.int_count++;
1515 info->mon.char_count += char_count;
1516 if (char_count > info->mon.char_max)
1517 info->mon.char_max = char_count;
1518 info->mon.char_last = char_count;
1519 #endif
1520 if (tty == NULL) {
1521 /* flush received characters */
1522 new_rx_get = (new_rx_get + char_count) &
1523 (rx_bufsize - 1);
1524 info->rflush_count++;
1525 } else {
1526 #ifdef BLOCKMOVE
1527 /* we'd like to use memcpy(t, f, n) and memset(s, c, count)
1528 for performance, but because of buffer boundaries, there
1529 may be several steps to the operation */
1530 while (1) {
1531 len = tty_prepare_flip_string(tty, &buf,
1532 char_count);
1533 if (!len)
1534 break;
1535
1536 len = min_t(unsigned int, min(len, char_count),
1537 rx_bufsize - new_rx_get);
1538
1539 memcpy_fromio(buf, cinfo->base_addr +
1540 rx_bufaddr + new_rx_get, len);
1541
1542 new_rx_get = (new_rx_get + len) &
1543 (rx_bufsize - 1);
1544 char_count -= len;
1545 info->icount.rx += len;
1546 info->idle_stats.recv_bytes += len;
1547 }
1548 #else
1549 len = tty_buffer_request_room(tty, char_count);
1550 while (len--) {
1551 data = readb(cinfo->base_addr + rx_bufaddr +
1552 new_rx_get);
1553 new_rx_get = (new_rx_get + 1)& (rx_bufsize - 1);
1554 tty_insert_flip_char(tty, data, TTY_NORMAL);
1555 info->idle_stats.recv_bytes++;
1556 info->icount.rx++;
1557 }
1558 #endif
1559 #ifdef CONFIG_CYZ_INTR
1560 /* Recalculate the number of chars in the RX buffer and issue
1561 a cmd in case it's higher than the RX high water mark */
1562 rx_put = readl(&buf_ctrl->rx_put);
1563 if (rx_put >= rx_get)
1564 char_count = rx_put - rx_get;
1565 else
1566 char_count = rx_put - rx_get + rx_bufsize;
1567 if (char_count >= (int)readl(&buf_ctrl->rx_threshold) &&
1568 !timer_pending(&cyz_rx_full_timer[
1569 info->line]))
1570 mod_timer(&cyz_rx_full_timer[info->line],
1571 jiffies + 1);
1572 #endif
1573 info->idle_stats.recv_idle = jiffies;
1574 tty_schedule_flip(tty);
1575 }
1576 /* Update rx_get */
1577 cy_writel(&buf_ctrl->rx_get, new_rx_get);
1578 }
1579 }
1580
1581 static void
1582 cyz_handle_tx(struct cyclades_port *info, struct CH_CTRL __iomem *ch_ctrl,
1583 struct BUF_CTRL __iomem *buf_ctrl)
1584 {
1585 struct cyclades_card *cinfo = info->card;
1586 struct tty_struct *tty = info->tty;
1587 char data;
1588 int char_count;
1589 #ifdef BLOCKMOVE
1590 int small_count;
1591 #endif
1592 __u32 tx_put, tx_get, tx_bufsize, tx_bufaddr;
1593
1594 if (info->xmit_cnt <= 0) /* Nothing to transmit */
1595 return;
1596
1597 tx_get = readl(&buf_ctrl->tx_get);
1598 tx_put = readl(&buf_ctrl->tx_put);
1599 tx_bufsize = readl(&buf_ctrl->tx_bufsize);
1600 tx_bufaddr = readl(&buf_ctrl->tx_bufaddr);
1601 if (tx_put >= tx_get)
1602 char_count = tx_get - tx_put - 1 + tx_bufsize;
1603 else
1604 char_count = tx_get - tx_put - 1;
1605
1606 if (char_count) {
1607
1608 if (tty == NULL)
1609 goto ztxdone;
1610
1611 if (info->x_char) { /* send special char */
1612 data = info->x_char;
1613
1614 cy_writeb(cinfo->base_addr + tx_bufaddr + tx_put, data);
1615 tx_put = (tx_put + 1) & (tx_bufsize - 1);
1616 info->x_char = 0;
1617 char_count--;
1618 info->icount.tx++;
1619 }
1620 #ifdef BLOCKMOVE
1621 while (0 < (small_count = min_t(unsigned int,
1622 tx_bufsize - tx_put, min_t(unsigned int,
1623 (SERIAL_XMIT_SIZE - info->xmit_tail),
1624 min_t(unsigned int, info->xmit_cnt,
1625 char_count))))) {
1626
1627 memcpy_toio((char *)(cinfo->base_addr + tx_bufaddr +
1628 tx_put),
1629 &info->xmit_buf[info->xmit_tail],
1630 small_count);
1631
1632 tx_put = (tx_put + small_count) & (tx_bufsize - 1);
1633 char_count -= small_count;
1634 info->icount.tx += small_count;
1635 info->xmit_cnt -= small_count;
1636 info->xmit_tail = (info->xmit_tail + small_count) &
1637 (SERIAL_XMIT_SIZE - 1);
1638 }
1639 #else
1640 while (info->xmit_cnt && char_count) {
1641 data = info->xmit_buf[info->xmit_tail];
1642 info->xmit_cnt--;
1643 info->xmit_tail = (info->xmit_tail + 1) &
1644 (SERIAL_XMIT_SIZE - 1);
1645
1646 cy_writeb(cinfo->base_addr + tx_bufaddr + tx_put, data);
1647 tx_put = (tx_put + 1) & (tx_bufsize - 1);
1648 char_count--;
1649 info->icount.tx++;
1650 }
1651 #endif
1652 ztxdone:
1653 tty_wakeup(tty);
1654 /* Update tx_put */
1655 cy_writel(&buf_ctrl->tx_put, tx_put);
1656 }
1657 }
1658
1659 static void cyz_handle_cmd(struct cyclades_card *cinfo)
1660 {
1661 struct tty_struct *tty;
1662 struct cyclades_port *info;
1663 static struct FIRM_ID __iomem *firm_id;
1664 static struct ZFW_CTRL __iomem *zfw_ctrl;
1665 static struct BOARD_CTRL __iomem *board_ctrl;
1666 static struct CH_CTRL __iomem *ch_ctrl;
1667 static struct BUF_CTRL __iomem *buf_ctrl;
1668 __u32 channel;
1669 __u8 cmd;
1670 __u32 param;
1671 __u32 hw_ver, fw_ver;
1672 int special_count;
1673 int delta_count;
1674
1675 firm_id = cinfo->base_addr + ID_ADDRESS;
1676 zfw_ctrl = cinfo->base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
1677 board_ctrl = &zfw_ctrl->board_ctrl;
1678 fw_ver = readl(&board_ctrl->fw_version);
1679 hw_ver = readl(&((struct RUNTIME_9060 __iomem *)(cinfo->ctl_addr))->
1680 mail_box_0);
1681
1682 while (cyz_fetch_msg(cinfo, &channel, &cmd, &param) == 1) {
1683 special_count = 0;
1684 delta_count = 0;
1685 info = &cinfo->ports[channel];
1686 if ((tty = info->tty) == NULL)
1687 continue;
1688
1689 ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]);
1690 buf_ctrl = &(zfw_ctrl->buf_ctrl[channel]);
1691
1692 switch (cmd) {
1693 case C_CM_PR_ERROR:
1694 tty_insert_flip_char(tty, 0, TTY_PARITY);
1695 info->icount.rx++;
1696 special_count++;
1697 break;
1698 case C_CM_FR_ERROR:
1699 tty_insert_flip_char(tty, 0, TTY_FRAME);
1700 info->icount.rx++;
1701 special_count++;
1702 break;
1703 case C_CM_RXBRK:
1704 tty_insert_flip_char(tty, 0, TTY_BREAK);
1705 info->icount.rx++;
1706 special_count++;
1707 break;
1708 case C_CM_MDCD:
1709 info->icount.dcd++;
1710 delta_count++;
1711 if (info->flags & ASYNC_CHECK_CD) {
1712 if ((fw_ver > 241 ? ((u_long) param) :
1713 readl(&ch_ctrl->rs_status)) &
1714 C_RS_DCD) {
1715 wake_up_interruptible(&info->open_wait);
1716 } else {
1717 tty_hangup(info->tty);
1718 wake_up_interruptible(&info->open_wait);
1719 info->flags &= ~ASYNC_NORMAL_ACTIVE;
1720 }
1721 }
1722 break;
1723 case C_CM_MCTS:
1724 info->icount.cts++;
1725 delta_count++;
1726 break;
1727 case C_CM_MRI:
1728 info->icount.rng++;
1729 delta_count++;
1730 break;
1731 case C_CM_MDSR:
1732 info->icount.dsr++;
1733 delta_count++;
1734 break;
1735 #ifdef Z_WAKE
1736 case C_CM_IOCTLW:
1737 complete(&info->shutdown_wait);
1738 break;
1739 #endif
1740 #ifdef CONFIG_CYZ_INTR
1741 case C_CM_RXHIWM:
1742 case C_CM_RXNNDT:
1743 case C_CM_INTBACK2:
1744 /* Reception Interrupt */
1745 #ifdef CY_DEBUG_INTERRUPTS
1746 printk(KERN_DEBUG "cyz_interrupt: rcvd intr, card %d, "
1747 "port %ld\n", info->card, channel);
1748 #endif
1749 cyz_handle_rx(info, ch_ctrl, buf_ctrl);
1750 break;
1751 case C_CM_TXBEMPTY:
1752 case C_CM_TXLOWWM:
1753 case C_CM_INTBACK:
1754 /* Transmission Interrupt */
1755 #ifdef CY_DEBUG_INTERRUPTS
1756 printk(KERN_DEBUG "cyz_interrupt: xmit intr, card %d, "
1757 "port %ld\n", info->card, channel);
1758 #endif
1759 cyz_handle_tx(info, ch_ctrl, buf_ctrl);
1760 break;
1761 #endif /* CONFIG_CYZ_INTR */
1762 case C_CM_FATAL:
1763 /* should do something with this !!! */
1764 break;
1765 default:
1766 break;
1767 }
1768 if (delta_count)
1769 wake_up_interruptible(&info->delta_msr_wait);
1770 if (special_count)
1771 tty_schedule_flip(tty);
1772 }
1773 }
1774
1775 #ifdef CONFIG_CYZ_INTR
1776 static irqreturn_t cyz_interrupt(int irq, void *dev_id)
1777 {
1778 struct cyclades_card *cinfo = dev_id;
1779
1780 if (unlikely(cinfo == NULL)) {
1781 #ifdef CY_DEBUG_INTERRUPTS
1782 printk(KERN_DEBUG "cyz_interrupt: spurious interrupt %d\n",irq);
1783 #endif
1784 return IRQ_NONE; /* spurious interrupt */
1785 }
1786
1787 if (unlikely(!ISZLOADED(*cinfo))) {
1788 #ifdef CY_DEBUG_INTERRUPTS
1789 printk(KERN_DEBUG "cyz_interrupt: board not yet loaded "
1790 "(IRQ%d).\n", irq);
1791 #endif
1792 return IRQ_NONE;
1793 }
1794
1795 /* Handle the interrupts */
1796 cyz_handle_cmd(cinfo);
1797
1798 return IRQ_HANDLED;
1799 } /* cyz_interrupt */
1800
1801 static void cyz_rx_restart(unsigned long arg)
1802 {
1803 struct cyclades_port *info = (struct cyclades_port *)arg;
1804 struct cyclades_card *card = info->card;
1805 int retval;
1806 __u32 channel = info->line - card->first_line;
1807 unsigned long flags;
1808
1809 spin_lock_irqsave(&card->card_lock, flags);
1810 retval = cyz_issue_cmd(card, channel, C_CM_INTBACK2, 0L);
1811 if (retval != 0) {
1812 printk(KERN_ERR "cyc:cyz_rx_restart retval on ttyC%d was %x\n",
1813 info->line, retval);
1814 }
1815 spin_unlock_irqrestore(&card->card_lock, flags);
1816 }
1817
1818 #else /* CONFIG_CYZ_INTR */
1819
1820 static void cyz_poll(unsigned long arg)
1821 {
1822 struct cyclades_card *cinfo;
1823 struct cyclades_port *info;
1824 struct tty_struct *tty;
1825 struct FIRM_ID __iomem *firm_id;
1826 struct ZFW_CTRL __iomem *zfw_ctrl;
1827 struct BOARD_CTRL __iomem *board_ctrl;
1828 struct CH_CTRL __iomem *ch_ctrl;
1829 struct BUF_CTRL __iomem *buf_ctrl;
1830 unsigned long expires = jiffies + HZ;
1831 int card, port;
1832
1833 for (card = 0; card < NR_CARDS; card++) {
1834 cinfo = &cy_card[card];
1835
1836 if (!IS_CYC_Z(*cinfo))
1837 continue;
1838 if (!ISZLOADED(*cinfo))
1839 continue;
1840
1841 firm_id = cinfo->base_addr + ID_ADDRESS;
1842 zfw_ctrl = cinfo->base_addr +
1843 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
1844 board_ctrl = &(zfw_ctrl->board_ctrl);
1845
1846 /* Skip first polling cycle to avoid racing conditions with the FW */
1847 if (!cinfo->intr_enabled) {
1848 cinfo->nports = (int)readl(&board_ctrl->n_channel);
1849 cinfo->intr_enabled = 1;
1850 continue;
1851 }
1852
1853 cyz_handle_cmd(cinfo);
1854
1855 for (port = 0; port < cinfo->nports; port++) {
1856 info = &cinfo->ports[port];
1857 tty = info->tty;
1858 ch_ctrl = &(zfw_ctrl->ch_ctrl[port]);
1859 buf_ctrl = &(zfw_ctrl->buf_ctrl[port]);
1860
1861 if (!info->throttle)
1862 cyz_handle_rx(info, ch_ctrl, buf_ctrl);
1863 cyz_handle_tx(info, ch_ctrl, buf_ctrl);
1864 }
1865 /* poll every 'cyz_polling_cycle' period */
1866 expires = jiffies + cyz_polling_cycle;
1867 }
1868 mod_timer(&cyz_timerlist, expires);
1869 } /* cyz_poll */
1870
1871 #endif /* CONFIG_CYZ_INTR */
1872
1873 /********** End of block of Cyclades-Z specific code *********/
1874 /***********************************************************/
1875
1876 /* This is called whenever a port becomes active;
1877 interrupts are enabled and DTR & RTS are turned on.
1878 */
1879 static int startup(struct cyclades_port *info)
1880 {
1881 struct cyclades_card *card;
1882 unsigned long flags;
1883 int retval = 0;
1884 void __iomem *base_addr;
1885 int chip, channel, index;
1886 unsigned long page;
1887
1888 card = info->card;
1889 channel = info->line - card->first_line;
1890
1891 page = get_zeroed_page(GFP_KERNEL);
1892 if (!page)
1893 return -ENOMEM;
1894
1895 spin_lock_irqsave(&card->card_lock, flags);
1896
1897 if (info->flags & ASYNC_INITIALIZED) {
1898 free_page(page);
1899 goto errout;
1900 }
1901
1902 if (!info->type) {
1903 if (info->tty) {
1904 set_bit(TTY_IO_ERROR, &info->tty->flags);
1905 }
1906 free_page(page);
1907 goto errout;
1908 }
1909
1910 if (info->xmit_buf)
1911 free_page(page);
1912 else
1913 info->xmit_buf = (unsigned char *)page;
1914
1915 spin_unlock_irqrestore(&card->card_lock, flags);
1916
1917 set_line_char(info);
1918
1919 if (!IS_CYC_Z(*card)) {
1920 chip = channel >> 2;
1921 channel &= 0x03;
1922 index = card->bus_index;
1923 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
1924
1925 #ifdef CY_DEBUG_OPEN
1926 printk(KERN_DEBUG "cyc startup card %d, chip %d, channel %d, "
1927 "base_addr %p\n",
1928 card, chip, channel, base_addr);
1929 #endif
1930 spin_lock_irqsave(&card->card_lock, flags);
1931
1932 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
1933
1934 cy_writeb(base_addr + (CyRTPR << index),
1935 (info->default_timeout ? info->default_timeout : 0x02));
1936 /* 10ms rx timeout */
1937
1938 cyy_issue_cmd(base_addr, CyCHAN_CTL | CyENB_RCVR | CyENB_XMTR,
1939 index);
1940
1941 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
1942 cy_writeb(base_addr + (CyMSVR1 << index), CyRTS);
1943 cy_writeb(base_addr + (CyMSVR2 << index), CyDTR);
1944
1945 #ifdef CY_DEBUG_DTR
1946 printk(KERN_DEBUG "cyc:startup raising DTR\n");
1947 printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
1948 readb(base_addr + (CyMSVR1 << index)),
1949 readb(base_addr + (CyMSVR2 << index)));
1950 #endif
1951
1952 cy_writeb(base_addr + (CySRER << index),
1953 readb(base_addr + (CySRER << index)) | CyRxData);
1954 info->flags |= ASYNC_INITIALIZED;
1955
1956 if (info->tty) {
1957 clear_bit(TTY_IO_ERROR, &info->tty->flags);
1958 }
1959 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
1960 info->breakon = info->breakoff = 0;
1961 memset((char *)&info->idle_stats, 0, sizeof(info->idle_stats));
1962 info->idle_stats.in_use =
1963 info->idle_stats.recv_idle =
1964 info->idle_stats.xmit_idle = jiffies;
1965
1966 spin_unlock_irqrestore(&card->card_lock, flags);
1967
1968 } else {
1969 struct FIRM_ID __iomem *firm_id;
1970 struct ZFW_CTRL __iomem *zfw_ctrl;
1971 struct BOARD_CTRL __iomem *board_ctrl;
1972 struct CH_CTRL __iomem *ch_ctrl;
1973
1974 base_addr = card->base_addr;
1975
1976 firm_id = base_addr + ID_ADDRESS;
1977 if (!ISZLOADED(*card)) {
1978 return -ENODEV;
1979 }
1980
1981 zfw_ctrl = card->base_addr +
1982 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
1983 board_ctrl = &zfw_ctrl->board_ctrl;
1984 ch_ctrl = zfw_ctrl->ch_ctrl;
1985
1986 #ifdef CY_DEBUG_OPEN
1987 printk(KERN_DEBUG "cyc startup Z card %d, channel %d, "
1988 "base_addr %p\n", card, channel, base_addr);
1989 #endif
1990 spin_lock_irqsave(&card->card_lock, flags);
1991
1992 cy_writel(&ch_ctrl[channel].op_mode, C_CH_ENABLE);
1993 #ifdef Z_WAKE
1994 #ifdef CONFIG_CYZ_INTR
1995 cy_writel(&ch_ctrl[channel].intr_enable,
1996 C_IN_TXBEMPTY | C_IN_TXLOWWM | C_IN_RXHIWM |
1997 C_IN_RXNNDT | C_IN_IOCTLW | C_IN_MDCD);
1998 #else
1999 cy_writel(&ch_ctrl[channel].intr_enable,
2000 C_IN_IOCTLW | C_IN_MDCD);
2001 #endif /* CONFIG_CYZ_INTR */
2002 #else
2003 #ifdef CONFIG_CYZ_INTR
2004 cy_writel(&ch_ctrl[channel].intr_enable,
2005 C_IN_TXBEMPTY | C_IN_TXLOWWM | C_IN_RXHIWM |
2006 C_IN_RXNNDT | C_IN_MDCD);
2007 #else
2008 cy_writel(&ch_ctrl[channel].intr_enable, C_IN_MDCD);
2009 #endif /* CONFIG_CYZ_INTR */
2010 #endif /* Z_WAKE */
2011
2012 retval = cyz_issue_cmd(card, channel, C_CM_IOCTL, 0L);
2013 if (retval != 0) {
2014 printk(KERN_ERR "cyc:startup(1) retval on ttyC%d was "
2015 "%x\n", info->line, retval);
2016 }
2017
2018 /* Flush RX buffers before raising DTR and RTS */
2019 retval = cyz_issue_cmd(card, channel, C_CM_FLUSH_RX, 0L);
2020 if (retval != 0) {
2021 printk(KERN_ERR "cyc:startup(2) retval on ttyC%d was "
2022 "%x\n", info->line, retval);
2023 }
2024
2025 /* set timeout !!! */
2026 /* set RTS and DTR !!! */
2027 cy_writel(&ch_ctrl[channel].rs_control,
2028 readl(&ch_ctrl[channel].rs_control) | C_RS_RTS |
2029 C_RS_DTR);
2030 retval = cyz_issue_cmd(card, channel, C_CM_IOCTLM, 0L);
2031 if (retval != 0) {
2032 printk(KERN_ERR "cyc:startup(3) retval on ttyC%d was "
2033 "%x\n", info->line, retval);
2034 }
2035 #ifdef CY_DEBUG_DTR
2036 printk(KERN_DEBUG "cyc:startup raising Z DTR\n");
2037 #endif
2038
2039 /* enable send, recv, modem !!! */
2040
2041 info->flags |= ASYNC_INITIALIZED;
2042 if (info->tty) {
2043 clear_bit(TTY_IO_ERROR, &info->tty->flags);
2044 }
2045 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
2046 info->breakon = info->breakoff = 0;
2047 memset((char *)&info->idle_stats, 0, sizeof(info->idle_stats));
2048 info->idle_stats.in_use =
2049 info->idle_stats.recv_idle =
2050 info->idle_stats.xmit_idle = jiffies;
2051
2052 spin_unlock_irqrestore(&card->card_lock, flags);
2053 }
2054
2055 #ifdef CY_DEBUG_OPEN
2056 printk(KERN_DEBUG "cyc startup done\n");
2057 #endif
2058 return 0;
2059
2060 errout:
2061 spin_unlock_irqrestore(&card->card_lock, flags);
2062 return retval;
2063 } /* startup */
2064
2065 static void start_xmit(struct cyclades_port *info)
2066 {
2067 struct cyclades_card *card;
2068 unsigned long flags;
2069 void __iomem *base_addr;
2070 int chip, channel, index;
2071
2072 card = info->card;
2073 channel = info->line - card->first_line;
2074 if (!IS_CYC_Z(*card)) {
2075 chip = channel >> 2;
2076 channel &= 0x03;
2077 index = card->bus_index;
2078 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
2079
2080 spin_lock_irqsave(&card->card_lock, flags);
2081 cy_writeb(base_addr + (CyCAR << index), channel);
2082 cy_writeb(base_addr + (CySRER << index),
2083 readb(base_addr + (CySRER << index)) | CyTxRdy);
2084 spin_unlock_irqrestore(&card->card_lock, flags);
2085 } else {
2086 #ifdef CONFIG_CYZ_INTR
2087 int retval;
2088
2089 spin_lock_irqsave(&card->card_lock, flags);
2090 retval = cyz_issue_cmd(card, channel, C_CM_INTBACK, 0L);
2091 if (retval != 0) {
2092 printk(KERN_ERR "cyc:start_xmit retval on ttyC%d was "
2093 "%x\n", info->line, retval);
2094 }
2095 spin_unlock_irqrestore(&card->card_lock, flags);
2096 #else /* CONFIG_CYZ_INTR */
2097 /* Don't have to do anything at this time */
2098 #endif /* CONFIG_CYZ_INTR */
2099 }
2100 } /* start_xmit */
2101
2102 /*
2103 * This routine shuts down a serial port; interrupts are disabled,
2104 * and DTR is dropped if the hangup on close termio flag is on.
2105 */
2106 static void shutdown(struct cyclades_port *info)
2107 {
2108 struct cyclades_card *card;
2109 unsigned long flags;
2110 void __iomem *base_addr;
2111 int chip, channel, index;
2112
2113 if (!(info->flags & ASYNC_INITIALIZED)) {
2114 return;
2115 }
2116
2117 card = info->card;
2118 channel = info->line - card->first_line;
2119 if (!IS_CYC_Z(*card)) {
2120 chip = channel >> 2;
2121 channel &= 0x03;
2122 index = card->bus_index;
2123 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
2124
2125 #ifdef CY_DEBUG_OPEN
2126 printk(KERN_DEBUG "cyc shutdown Y card %d, chip %d, "
2127 "channel %d, base_addr %p\n",
2128 card, chip, channel, base_addr);
2129 #endif
2130
2131 spin_lock_irqsave(&card->card_lock, flags);
2132
2133 /* Clear delta_msr_wait queue to avoid mem leaks. */
2134 wake_up_interruptible(&info->delta_msr_wait);
2135
2136 if (info->xmit_buf) {
2137 unsigned char *temp;
2138 temp = info->xmit_buf;
2139 info->xmit_buf = NULL;
2140 free_page((unsigned long)temp);
2141 }
2142 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
2143 if (!info->tty || (info->tty->termios->c_cflag & HUPCL)) {
2144 cy_writeb(base_addr + (CyMSVR1 << index), ~CyRTS);
2145 cy_writeb(base_addr + (CyMSVR2 << index), ~CyDTR);
2146 #ifdef CY_DEBUG_DTR
2147 printk(KERN_DEBUG "cyc shutdown dropping DTR\n");
2148 printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
2149 readb(base_addr + (CyMSVR1 << index)),
2150 readb(base_addr + (CyMSVR2 << index)));
2151 #endif
2152 }
2153 cyy_issue_cmd(base_addr, CyCHAN_CTL | CyDIS_RCVR, index);
2154 /* it may be appropriate to clear _XMIT at
2155 some later date (after testing)!!! */
2156
2157 if (info->tty) {
2158 set_bit(TTY_IO_ERROR, &info->tty->flags);
2159 }
2160 info->flags &= ~ASYNC_INITIALIZED;
2161 spin_unlock_irqrestore(&card->card_lock, flags);
2162 } else {
2163 struct FIRM_ID __iomem *firm_id;
2164 struct ZFW_CTRL __iomem *zfw_ctrl;
2165 struct BOARD_CTRL __iomem *board_ctrl;
2166 struct CH_CTRL __iomem *ch_ctrl;
2167 int retval;
2168
2169 base_addr = card->base_addr;
2170 #ifdef CY_DEBUG_OPEN
2171 printk(KERN_DEBUG "cyc shutdown Z card %d, channel %d, "
2172 "base_addr %p\n", card, channel, base_addr);
2173 #endif
2174
2175 firm_id = base_addr + ID_ADDRESS;
2176 if (!ISZLOADED(*card)) {
2177 return;
2178 }
2179
2180 zfw_ctrl = card->base_addr +
2181 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
2182 board_ctrl = &zfw_ctrl->board_ctrl;
2183 ch_ctrl = zfw_ctrl->ch_ctrl;
2184
2185 spin_lock_irqsave(&card->card_lock, flags);
2186
2187 if (info->xmit_buf) {
2188 unsigned char *temp;
2189 temp = info->xmit_buf;
2190 info->xmit_buf = NULL;
2191 free_page((unsigned long)temp);
2192 }
2193
2194 if (!info->tty || (info->tty->termios->c_cflag & HUPCL)) {
2195 cy_writel(&ch_ctrl[channel].rs_control,
2196 (__u32)(readl(&ch_ctrl[channel].rs_control) &
2197 ~(C_RS_RTS | C_RS_DTR)));
2198 retval = cyz_issue_cmd(info->card, channel,
2199 C_CM_IOCTLM, 0L);
2200 if (retval != 0) {
2201 printk(KERN_ERR"cyc:shutdown retval on ttyC%d "
2202 "was %x\n", info->line, retval);
2203 }
2204 #ifdef CY_DEBUG_DTR
2205 printk(KERN_DEBUG "cyc:shutdown dropping Z DTR\n");
2206 #endif
2207 }
2208
2209 if (info->tty) {
2210 set_bit(TTY_IO_ERROR, &info->tty->flags);
2211 }
2212 info->flags &= ~ASYNC_INITIALIZED;
2213
2214 spin_unlock_irqrestore(&card->card_lock, flags);
2215 }
2216
2217 #ifdef CY_DEBUG_OPEN
2218 printk(KERN_DEBUG "cyc shutdown done\n");
2219 #endif
2220 } /* shutdown */
2221
2222 /*
2223 * ------------------------------------------------------------
2224 * cy_open() and friends
2225 * ------------------------------------------------------------
2226 */
2227
2228 static int
2229 block_til_ready(struct tty_struct *tty, struct file *filp,
2230 struct cyclades_port *info)
2231 {
2232 DECLARE_WAITQUEUE(wait, current);
2233 struct cyclades_card *cinfo;
2234 unsigned long flags;
2235 int chip, channel, index;
2236 int retval;
2237 void __iomem *base_addr;
2238
2239 cinfo = info->card;
2240 channel = info->line - cinfo->first_line;
2241
2242 /*
2243 * If the device is in the middle of being closed, then block
2244 * until it's done, and then try again.
2245 */
2246 if (tty_hung_up_p(filp) || (info->flags & ASYNC_CLOSING)) {
2247 wait_event_interruptible(info->close_wait,
2248 !(info->flags & ASYNC_CLOSING));
2249 return (info->flags & ASYNC_HUP_NOTIFY) ? -EAGAIN: -ERESTARTSYS;
2250 }
2251
2252 /*
2253 * If non-blocking mode is set, then make the check up front
2254 * and then exit.
2255 */
2256 if ((filp->f_flags & O_NONBLOCK) || (tty->flags & (1 << TTY_IO_ERROR))) {
2257 info->flags |= ASYNC_NORMAL_ACTIVE;
2258 return 0;
2259 }
2260
2261 /*
2262 * Block waiting for the carrier detect and the line to become
2263 * free (i.e., not in use by the callout). While we are in
2264 * this loop, info->count is dropped by one, so that
2265 * cy_close() knows when to free things. We restore it upon
2266 * exit, either normal or abnormal.
2267 */
2268 retval = 0;
2269 add_wait_queue(&info->open_wait, &wait);
2270 #ifdef CY_DEBUG_OPEN
2271 printk(KERN_DEBUG "cyc block_til_ready before block: ttyC%d, "
2272 "count = %d\n", info->line, info->count);
2273 #endif
2274 spin_lock_irqsave(&cinfo->card_lock, flags);
2275 if (!tty_hung_up_p(filp))
2276 info->count--;
2277 spin_unlock_irqrestore(&cinfo->card_lock, flags);
2278 #ifdef CY_DEBUG_COUNT
2279 printk(KERN_DEBUG "cyc block_til_ready: (%d): decrementing count to "
2280 "%d\n", current->pid, info->count);
2281 #endif
2282 info->blocked_open++;
2283
2284 if (!IS_CYC_Z(*cinfo)) {
2285 chip = channel >> 2;
2286 channel &= 0x03;
2287 index = cinfo->bus_index;
2288 base_addr = cinfo->base_addr + (cy_chip_offset[chip] << index);
2289
2290 while (1) {
2291 spin_lock_irqsave(&cinfo->card_lock, flags);
2292 if ((tty->termios->c_cflag & CBAUD)) {
2293 cy_writeb(base_addr + (CyCAR << index),
2294 (u_char) channel);
2295 cy_writeb(base_addr + (CyMSVR1 << index),
2296 CyRTS);
2297 cy_writeb(base_addr + (CyMSVR2 << index),
2298 CyDTR);
2299 #ifdef CY_DEBUG_DTR
2300 printk(KERN_DEBUG "cyc:block_til_ready raising "
2301 "DTR\n");
2302 printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
2303 readb(base_addr + (CyMSVR1 << index)),
2304 readb(base_addr + (CyMSVR2 << index)));
2305 #endif
2306 }
2307 spin_unlock_irqrestore(&cinfo->card_lock, flags);
2308
2309 set_current_state(TASK_INTERRUPTIBLE);
2310 if (tty_hung_up_p(filp) ||
2311 !(info->flags & ASYNC_INITIALIZED)) {
2312 retval = ((info->flags & ASYNC_HUP_NOTIFY) ?
2313 -EAGAIN : -ERESTARTSYS);
2314 break;
2315 }
2316
2317 spin_lock_irqsave(&cinfo->card_lock, flags);
2318 cy_writeb(base_addr + (CyCAR << index),
2319 (u_char) channel);
2320 if (!(info->flags & ASYNC_CLOSING) && (C_CLOCAL(tty) ||
2321 (readb(base_addr +
2322 (CyMSVR1 << index)) & CyDCD))) {
2323 spin_unlock_irqrestore(&cinfo->card_lock, flags);
2324 break;
2325 }
2326 spin_unlock_irqrestore(&cinfo->card_lock, flags);
2327
2328 if (signal_pending(current)) {
2329 retval = -ERESTARTSYS;
2330 break;
2331 }
2332 #ifdef CY_DEBUG_OPEN
2333 printk(KERN_DEBUG "cyc block_til_ready blocking: "
2334 "ttyC%d, count = %d\n",
2335 info->line, info->count);
2336 #endif
2337 schedule();
2338 }
2339 } else {
2340 struct FIRM_ID __iomem *firm_id;
2341 struct ZFW_CTRL __iomem *zfw_ctrl;
2342 struct BOARD_CTRL __iomem *board_ctrl;
2343 struct CH_CTRL __iomem *ch_ctrl;
2344
2345 base_addr = cinfo->base_addr;
2346 firm_id = base_addr + ID_ADDRESS;
2347 if (!ISZLOADED(*cinfo)) {
2348 __set_current_state(TASK_RUNNING);
2349 remove_wait_queue(&info->open_wait, &wait);
2350 return -EINVAL;
2351 }
2352
2353 zfw_ctrl = base_addr + (readl(&firm_id->zfwctrl_addr)& 0xfffff);
2354 board_ctrl = &zfw_ctrl->board_ctrl;
2355 ch_ctrl = zfw_ctrl->ch_ctrl;
2356
2357 while (1) {
2358 if ((tty->termios->c_cflag & CBAUD)) {
2359 cy_writel(&ch_ctrl[channel].rs_control,
2360 readl(&ch_ctrl[channel].rs_control) |
2361 C_RS_RTS | C_RS_DTR);
2362 retval = cyz_issue_cmd(cinfo,
2363 channel, C_CM_IOCTLM, 0L);
2364 if (retval != 0) {
2365 printk(KERN_ERR "cyc:block_til_ready "
2366 "retval on ttyC%d was %x\n",
2367 info->line, retval);
2368 }
2369 #ifdef CY_DEBUG_DTR
2370 printk(KERN_DEBUG "cyc:block_til_ready raising "
2371 "Z DTR\n");
2372 #endif
2373 }
2374
2375 set_current_state(TASK_INTERRUPTIBLE);
2376 if (tty_hung_up_p(filp) ||
2377 !(info->flags & ASYNC_INITIALIZED)) {
2378 retval = ((info->flags & ASYNC_HUP_NOTIFY) ?
2379 -EAGAIN : -ERESTARTSYS);
2380 break;
2381 }
2382 if (!(info->flags & ASYNC_CLOSING) && (C_CLOCAL(tty) ||
2383 (readl(&ch_ctrl[channel].rs_status) &
2384 C_RS_DCD))) {
2385 break;
2386 }
2387 if (signal_pending(current)) {
2388 retval = -ERESTARTSYS;
2389 break;
2390 }
2391 #ifdef CY_DEBUG_OPEN
2392 printk(KERN_DEBUG "cyc block_til_ready blocking: "
2393 "ttyC%d, count = %d\n",
2394 info->line, info->count);
2395 #endif
2396 schedule();
2397 }
2398 }
2399 __set_current_state(TASK_RUNNING);
2400 remove_wait_queue(&info->open_wait, &wait);
2401 if (!tty_hung_up_p(filp)) {
2402 info->count++;
2403 #ifdef CY_DEBUG_COUNT
2404 printk(KERN_DEBUG "cyc:block_til_ready (%d): incrementing "
2405 "count to %d\n", current->pid, info->count);
2406 #endif
2407 }
2408 info->blocked_open--;
2409 #ifdef CY_DEBUG_OPEN
2410 printk(KERN_DEBUG "cyc:block_til_ready after blocking: ttyC%d, "
2411 "count = %d\n", info->line, info->count);
2412 #endif
2413 if (retval)
2414 return retval;
2415 info->flags |= ASYNC_NORMAL_ACTIVE;
2416 return 0;
2417 } /* block_til_ready */
2418
2419 /*
2420 * This routine is called whenever a serial port is opened. It
2421 * performs the serial-specific initialization for the tty structure.
2422 */
2423 static int cy_open(struct tty_struct *tty, struct file *filp)
2424 {
2425 struct cyclades_port *info;
2426 unsigned int i;
2427 int retval, line;
2428
2429 line = tty->index;
2430 if ((line < 0) || (NR_PORTS <= line)) {
2431 return -ENODEV;
2432 }
2433 for (i = 0; i < NR_CARDS; i++)
2434 if (line < cy_card[i].first_line + cy_card[i].nports &&
2435 line >= cy_card[i].first_line)
2436 break;
2437 if (i >= NR_CARDS)
2438 return -ENODEV;
2439 info = &cy_card[i].ports[line - cy_card[i].first_line];
2440 if (info->line < 0) {
2441 return -ENODEV;
2442 }
2443
2444 /* If the card's firmware hasn't been loaded,
2445 treat it as absent from the system. This
2446 will make the user pay attention.
2447 */
2448 if (IS_CYC_Z(*info->card)) {
2449 struct cyclades_card *cinfo = info->card;
2450 struct FIRM_ID __iomem *firm_id = cinfo->base_addr + ID_ADDRESS;
2451
2452 if (!ISZLOADED(*cinfo)) {
2453 if (((ZE_V1 == readl(&((struct RUNTIME_9060 __iomem *)
2454 (cinfo->ctl_addr))->mail_box_0)) &&
2455 Z_FPGA_CHECK(*cinfo)) &&
2456 (ZFIRM_HLT == readl(
2457 &firm_id->signature))) {
2458 printk(KERN_ERR "cyc:Cyclades-Z Error: you "
2459 "need an external power supply for "
2460 "this number of ports.\nFirmware "
2461 "halted.\n");
2462 } else {
2463 printk(KERN_ERR "cyc:Cyclades-Z firmware not "
2464 "yet loaded\n");
2465 }
2466 return -ENODEV;
2467 }
2468 #ifdef CONFIG_CYZ_INTR
2469 else {
2470 /* In case this Z board is operating in interrupt mode, its
2471 interrupts should be enabled as soon as the first open
2472 happens to one of its ports. */
2473 if (!cinfo->intr_enabled) {
2474 struct ZFW_CTRL __iomem *zfw_ctrl;
2475 struct BOARD_CTRL __iomem *board_ctrl;
2476
2477 zfw_ctrl = cinfo->base_addr +
2478 (readl(&firm_id->zfwctrl_addr) &
2479 0xfffff);
2480
2481 board_ctrl = &zfw_ctrl->board_ctrl;
2482
2483 /* Enable interrupts on the PLX chip */
2484 cy_writew(cinfo->ctl_addr + 0x68,
2485 readw(cinfo->ctl_addr + 0x68) | 0x0900);
2486 /* Enable interrupts on the FW */
2487 retval = cyz_issue_cmd(cinfo, 0,
2488 C_CM_IRQ_ENBL, 0L);
2489 if (retval != 0) {
2490 printk(KERN_ERR "cyc:IRQ enable retval "
2491 "was %x\n", retval);
2492 }
2493 cinfo->nports =
2494 (int)readl(&board_ctrl->n_channel);
2495 cinfo->intr_enabled = 1;
2496 }
2497 }
2498 #endif /* CONFIG_CYZ_INTR */
2499 /* Make sure this Z port really exists in hardware */
2500 if (info->line > (cinfo->first_line + cinfo->nports - 1))
2501 return -ENODEV;
2502 }
2503 #ifdef CY_DEBUG_OTHER
2504 printk(KERN_DEBUG "cyc:cy_open ttyC%d\n", info->line);
2505 #endif
2506 tty->driver_data = info;
2507 info->tty = tty;
2508 if (serial_paranoia_check(info, tty->name, "cy_open")) {
2509 return -ENODEV;
2510 }
2511 #ifdef CY_DEBUG_OPEN
2512 printk(KERN_DEBUG "cyc:cy_open ttyC%d, count = %d\n", info->line,
2513 info->count);
2514 #endif
2515 info->count++;
2516 #ifdef CY_DEBUG_COUNT
2517 printk(KERN_DEBUG "cyc:cy_open (%d): incrementing count to %d\n",
2518 current->pid, info->count);
2519 #endif
2520
2521 /*
2522 * If the port is the middle of closing, bail out now
2523 */
2524 if (tty_hung_up_p(filp) || (info->flags & ASYNC_CLOSING)) {
2525 wait_event_interruptible(info->close_wait,
2526 !(info->flags & ASYNC_CLOSING));
2527 return (info->flags & ASYNC_HUP_NOTIFY) ? -EAGAIN: -ERESTARTSYS;
2528 }
2529
2530 /*
2531 * Start up serial port
2532 */
2533 retval = startup(info);
2534 if (retval) {
2535 return retval;
2536 }
2537
2538 retval = block_til_ready(tty, filp, info);
2539 if (retval) {
2540 #ifdef CY_DEBUG_OPEN
2541 printk(KERN_DEBUG "cyc:cy_open returning after block_til_ready "
2542 "with %d\n", retval);
2543 #endif
2544 return retval;
2545 }
2546
2547 info->throttle = 0;
2548
2549 #ifdef CY_DEBUG_OPEN
2550 printk(KERN_DEBUG "cyc:cy_open done\n");
2551 #endif
2552 return 0;
2553 } /* cy_open */
2554
2555 /*
2556 * cy_wait_until_sent() --- wait until the transmitter is empty
2557 */
2558 static void cy_wait_until_sent(struct tty_struct *tty, int timeout)
2559 {
2560 struct cyclades_card *card;
2561 struct cyclades_port *info = tty->driver_data;
2562 void __iomem *base_addr;
2563 int chip, channel, index;
2564 unsigned long orig_jiffies;
2565 int char_time;
2566
2567 if (serial_paranoia_check(info, tty->name, "cy_wait_until_sent"))
2568 return;
2569
2570 if (info->xmit_fifo_size == 0)
2571 return; /* Just in case.... */
2572
2573 orig_jiffies = jiffies;
2574 /*
2575 * Set the check interval to be 1/5 of the estimated time to
2576 * send a single character, and make it at least 1. The check
2577 * interval should also be less than the timeout.
2578 *
2579 * Note: we have to use pretty tight timings here to satisfy
2580 * the NIST-PCTS.
2581 */
2582 char_time = (info->timeout - HZ / 50) / info->xmit_fifo_size;
2583 char_time = char_time / 5;
2584 if (char_time <= 0)
2585 char_time = 1;
2586 if (timeout < 0)
2587 timeout = 0;
2588 if (timeout)
2589 char_time = min(char_time, timeout);
2590 /*
2591 * If the transmitter hasn't cleared in twice the approximate
2592 * amount of time to send the entire FIFO, it probably won't
2593 * ever clear. This assumes the UART isn't doing flow
2594 * control, which is currently the case. Hence, if it ever
2595 * takes longer than info->timeout, this is probably due to a
2596 * UART bug of some kind. So, we clamp the timeout parameter at
2597 * 2*info->timeout.
2598 */
2599 if (!timeout || timeout > 2 * info->timeout)
2600 timeout = 2 * info->timeout;
2601 #ifdef CY_DEBUG_WAIT_UNTIL_SENT
2602 printk(KERN_DEBUG "In cy_wait_until_sent(%d) check=%d, jiff=%lu...",
2603 timeout, char_time, jiffies);
2604 #endif
2605 card = info->card;
2606 channel = (info->line) - (card->first_line);
2607 if (!IS_CYC_Z(*card)) {
2608 chip = channel >> 2;
2609 channel &= 0x03;
2610 index = card->bus_index;
2611 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
2612 while (readb(base_addr + (CySRER << index)) & CyTxRdy) {
2613 #ifdef CY_DEBUG_WAIT_UNTIL_SENT
2614 printk(KERN_DEBUG "Not clean (jiff=%lu)...", jiffies);
2615 #endif
2616 if (msleep_interruptible(jiffies_to_msecs(char_time)))
2617 break;
2618 if (timeout && time_after(jiffies, orig_jiffies +
2619 timeout))
2620 break;
2621 }
2622 }
2623 /* Run one more char cycle */
2624 msleep_interruptible(jiffies_to_msecs(char_time * 5));
2625 #ifdef CY_DEBUG_WAIT_UNTIL_SENT
2626 printk(KERN_DEBUG "Clean (jiff=%lu)...done\n", jiffies);
2627 #endif
2628 }
2629
2630 /*
2631 * This routine is called when a particular tty device is closed.
2632 */
2633 static void cy_close(struct tty_struct *tty, struct file *filp)
2634 {
2635 struct cyclades_port *info = tty->driver_data;
2636 struct cyclades_card *card;
2637 unsigned long flags;
2638
2639 #ifdef CY_DEBUG_OTHER
2640 printk(KERN_DEBUG "cyc:cy_close ttyC%d\n", info->line);
2641 #endif
2642
2643 if (!info || serial_paranoia_check(info, tty->name, "cy_close")) {
2644 return;
2645 }
2646
2647 card = info->card;
2648
2649 spin_lock_irqsave(&card->card_lock, flags);
2650 /* If the TTY is being hung up, nothing to do */
2651 if (tty_hung_up_p(filp)) {
2652 spin_unlock_irqrestore(&card->card_lock, flags);
2653 return;
2654 }
2655 #ifdef CY_DEBUG_OPEN
2656 printk(KERN_DEBUG "cyc:cy_close ttyC%d, count = %d\n", info->line,
2657 info->count);
2658 #endif
2659 if ((tty->count == 1) && (info->count != 1)) {
2660 /*
2661 * Uh, oh. tty->count is 1, which means that the tty
2662 * structure will be freed. Info->count should always
2663 * be one in these conditions. If it's greater than
2664 * one, we've got real problems, since it means the
2665 * serial port won't be shutdown.
2666 */
2667 printk(KERN_ERR "cyc:cy_close: bad serial port count; "
2668 "tty->count is 1, info->count is %d\n", info->count);
2669 info->count = 1;
2670 }
2671 #ifdef CY_DEBUG_COUNT
2672 printk(KERN_DEBUG "cyc:cy_close at (%d): decrementing count to %d\n",
2673 current->pid, info->count - 1);
2674 #endif
2675 if (--info->count < 0) {
2676 #ifdef CY_DEBUG_COUNT
2677 printk(KERN_DEBUG "cyc:cyc_close setting count to 0\n");
2678 #endif
2679 info->count = 0;
2680 }
2681 if (info->count) {
2682 spin_unlock_irqrestore(&card->card_lock, flags);
2683 return;
2684 }
2685 info->flags |= ASYNC_CLOSING;
2686
2687 /*
2688 * Now we wait for the transmit buffer to clear; and we notify
2689 * the line discipline to only process XON/XOFF characters.
2690 */
2691 tty->closing = 1;
2692 spin_unlock_irqrestore(&card->card_lock, flags);
2693 if (info->closing_wait != CY_CLOSING_WAIT_NONE) {
2694 tty_wait_until_sent(tty, info->closing_wait);
2695 }
2696 spin_lock_irqsave(&card->card_lock, flags);
2697
2698 if (!IS_CYC_Z(*card)) {
2699 int channel = info->line - card->first_line;
2700 int index = card->bus_index;
2701 void __iomem *base_addr = card->base_addr +
2702 (cy_chip_offset[channel >> 2] << index);
2703 /* Stop accepting input */
2704 channel &= 0x03;
2705 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
2706 cy_writeb(base_addr + (CySRER << index),
2707 readb(base_addr + (CySRER << index)) & ~CyRxData);
2708 if (info->flags & ASYNC_INITIALIZED) {
2709 /* Waiting for on-board buffers to be empty before closing
2710 the port */
2711 spin_unlock_irqrestore(&card->card_lock, flags);
2712 cy_wait_until_sent(tty, info->timeout);
2713 spin_lock_irqsave(&card->card_lock, flags);
2714 }
2715 } else {
2716 #ifdef Z_WAKE
2717 /* Waiting for on-board buffers to be empty before closing the port */
2718 void __iomem *base_addr = card->base_addr;
2719 struct FIRM_ID __iomem *firm_id = base_addr + ID_ADDRESS;
2720 struct ZFW_CTRL __iomem *zfw_ctrl =
2721 base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
2722 struct CH_CTRL __iomem *ch_ctrl = zfw_ctrl->ch_ctrl;
2723 int channel = info->line - card->first_line;
2724 int retval;
2725
2726 if (readl(&ch_ctrl[channel].flow_status) != C_FS_TXIDLE) {
2727 retval = cyz_issue_cmd(card, channel, C_CM_IOCTLW, 0L);
2728 if (retval != 0) {
2729 printk(KERN_DEBUG "cyc:cy_close retval on "
2730 "ttyC%d was %x\n", info->line, retval);
2731 }
2732 spin_unlock_irqrestore(&card->card_lock, flags);
2733 wait_for_completion_interruptible(&info->shutdown_wait);
2734 spin_lock_irqsave(&card->card_lock, flags);
2735 }
2736 #endif
2737 }
2738
2739 spin_unlock_irqrestore(&card->card_lock, flags);
2740 shutdown(info);
2741 if (tty->driver->flush_buffer)
2742 tty->driver->flush_buffer(tty);
2743 tty_ldisc_flush(tty);
2744 spin_lock_irqsave(&card->card_lock, flags);
2745
2746 tty->closing = 0;
2747 info->tty = NULL;
2748 if (info->blocked_open) {
2749 spin_unlock_irqrestore(&card->card_lock, flags);
2750 if (info->close_delay) {
2751 msleep_interruptible(jiffies_to_msecs
2752 (info->close_delay));
2753 }
2754 wake_up_interruptible(&info->open_wait);
2755 spin_lock_irqsave(&card->card_lock, flags);
2756 }
2757 info->flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CLOSING);
2758 wake_up_interruptible(&info->close_wait);
2759
2760 #ifdef CY_DEBUG_OTHER
2761 printk(KERN_DEBUG "cyc:cy_close done\n");
2762 #endif
2763
2764 spin_unlock_irqrestore(&card->card_lock, flags);
2765 } /* cy_close */
2766
2767 /* This routine gets called when tty_write has put something into
2768 * the write_queue. The characters may come from user space or
2769 * kernel space.
2770 *
2771 * This routine will return the number of characters actually
2772 * accepted for writing.
2773 *
2774 * If the port is not already transmitting stuff, start it off by
2775 * enabling interrupts. The interrupt service routine will then
2776 * ensure that the characters are sent.
2777 * If the port is already active, there is no need to kick it.
2778 *
2779 */
2780 static int cy_write(struct tty_struct *tty, const unsigned char *buf, int count)
2781 {
2782 struct cyclades_port *info = tty->driver_data;
2783 unsigned long flags;
2784 int c, ret = 0;
2785
2786 #ifdef CY_DEBUG_IO
2787 printk(KERN_DEBUG "cyc:cy_write ttyC%d\n", info->line);
2788 #endif
2789
2790 if (serial_paranoia_check(info, tty->name, "cy_write")) {
2791 return 0;
2792 }
2793
2794 if (!info->xmit_buf)
2795 return 0;
2796
2797 spin_lock_irqsave(&info->card->card_lock, flags);
2798 while (1) {
2799 c = min(count, min((int)(SERIAL_XMIT_SIZE - info->xmit_cnt - 1),
2800 (int)(SERIAL_XMIT_SIZE - info->xmit_head)));
2801
2802 if (c <= 0)
2803 break;
2804
2805 memcpy(info->xmit_buf + info->xmit_head, buf, c);
2806 info->xmit_head = (info->xmit_head + c) &
2807 (SERIAL_XMIT_SIZE - 1);
2808 info->xmit_cnt += c;
2809 buf += c;
2810 count -= c;
2811 ret += c;
2812 }
2813 spin_unlock_irqrestore(&info->card->card_lock, flags);
2814
2815 info->idle_stats.xmit_bytes += ret;
2816 info->idle_stats.xmit_idle = jiffies;
2817
2818 if (info->xmit_cnt && !tty->stopped && !tty->hw_stopped) {
2819 start_xmit(info);
2820 }
2821 return ret;
2822 } /* cy_write */
2823
2824 /*
2825 * This routine is called by the kernel to write a single
2826 * character to the tty device. If the kernel uses this routine,
2827 * it must call the flush_chars() routine (if defined) when it is
2828 * done stuffing characters into the driver. If there is no room
2829 * in the queue, the character is ignored.
2830 */
2831 static void cy_put_char(struct tty_struct *tty, unsigned char ch)
2832 {
2833 struct cyclades_port *info = tty->driver_data;
2834 unsigned long flags;
2835
2836 #ifdef CY_DEBUG_IO
2837 printk(KERN_DEBUG "cyc:cy_put_char ttyC%d\n", info->line);
2838 #endif
2839
2840 if (serial_paranoia_check(info, tty->name, "cy_put_char"))
2841 return;
2842
2843 if (!info->xmit_buf)
2844 return;
2845
2846 spin_lock_irqsave(&info->card->card_lock, flags);
2847 if (info->xmit_cnt >= (int)(SERIAL_XMIT_SIZE - 1)) {
2848 spin_unlock_irqrestore(&info->card->card_lock, flags);
2849 return;
2850 }
2851
2852 info->xmit_buf[info->xmit_head++] = ch;
2853 info->xmit_head &= SERIAL_XMIT_SIZE - 1;
2854 info->xmit_cnt++;
2855 info->idle_stats.xmit_bytes++;
2856 info->idle_stats.xmit_idle = jiffies;
2857 spin_unlock_irqrestore(&info->card->card_lock, flags);
2858 } /* cy_put_char */
2859
2860 /*
2861 * This routine is called by the kernel after it has written a
2862 * series of characters to the tty device using put_char().
2863 */
2864 static void cy_flush_chars(struct tty_struct *tty)
2865 {
2866 struct cyclades_port *info = tty->driver_data;
2867
2868 #ifdef CY_DEBUG_IO
2869 printk(KERN_DEBUG "cyc:cy_flush_chars ttyC%d\n", info->line);
2870 #endif
2871
2872 if (serial_paranoia_check(info, tty->name, "cy_flush_chars"))
2873 return;
2874
2875 if (info->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped ||
2876 !info->xmit_buf)
2877 return;
2878
2879 start_xmit(info);
2880 } /* cy_flush_chars */
2881
2882 /*
2883 * This routine returns the numbers of characters the tty driver
2884 * will accept for queuing to be written. This number is subject
2885 * to change as output buffers get emptied, or if the output flow
2886 * control is activated.
2887 */
2888 static int cy_write_room(struct tty_struct *tty)
2889 {
2890 struct cyclades_port *info = tty->driver_data;
2891 int ret;
2892
2893 #ifdef CY_DEBUG_IO
2894 printk(KERN_DEBUG "cyc:cy_write_room ttyC%d\n", info->line);
2895 #endif
2896
2897 if (serial_paranoia_check(info, tty->name, "cy_write_room"))
2898 return 0;
2899 ret = SERIAL_XMIT_SIZE - info->xmit_cnt - 1;
2900 if (ret < 0)
2901 ret = 0;
2902 return ret;
2903 } /* cy_write_room */
2904
2905 static int cy_chars_in_buffer(struct tty_struct *tty)
2906 {
2907 struct cyclades_card *card;
2908 struct cyclades_port *info = tty->driver_data;
2909 int channel;
2910
2911 if (serial_paranoia_check(info, tty->name, "cy_chars_in_buffer"))
2912 return 0;
2913
2914 card = info->card;
2915 channel = (info->line) - (card->first_line);
2916
2917 #ifdef Z_EXT_CHARS_IN_BUFFER
2918 if (!IS_CYC_Z(cy_card[card])) {
2919 #endif /* Z_EXT_CHARS_IN_BUFFER */
2920 #ifdef CY_DEBUG_IO
2921 printk(KERN_DEBUG "cyc:cy_chars_in_buffer ttyC%d %d\n",
2922 info->line, info->xmit_cnt);
2923 #endif
2924 return info->xmit_cnt;
2925 #ifdef Z_EXT_CHARS_IN_BUFFER
2926 } else {
2927 static struct FIRM_ID *firm_id;
2928 static struct ZFW_CTRL *zfw_ctrl;
2929 static struct CH_CTRL *ch_ctrl;
2930 static struct BUF_CTRL *buf_ctrl;
2931 int char_count;
2932 __u32 tx_put, tx_get, tx_bufsize;
2933
2934 firm_id = card->base_addr + ID_ADDRESS;
2935 zfw_ctrl = card->base_addr +
2936 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
2937 ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]);
2938 buf_ctrl = &(zfw_ctrl->buf_ctrl[channel]);
2939
2940 tx_get = readl(&buf_ctrl->tx_get);
2941 tx_put = readl(&buf_ctrl->tx_put);
2942 tx_bufsize = readl(&buf_ctrl->tx_bufsize);
2943 if (tx_put >= tx_get)
2944 char_count = tx_put - tx_get;
2945 else
2946 char_count = tx_put - tx_get + tx_bufsize;
2947 #ifdef CY_DEBUG_IO
2948 printk(KERN_DEBUG "cyc:cy_chars_in_buffer ttyC%d %d\n",
2949 info->line, info->xmit_cnt + char_count);
2950 #endif
2951 return info->xmit_cnt + char_count;
2952 }
2953 #endif /* Z_EXT_CHARS_IN_BUFFER */
2954 } /* cy_chars_in_buffer */
2955
2956 /*
2957 * ------------------------------------------------------------
2958 * cy_ioctl() and friends
2959 * ------------------------------------------------------------
2960 */
2961
2962 static void cyy_baud_calc(struct cyclades_port *info, __u32 baud)
2963 {
2964 int co, co_val, bpr;
2965 __u32 cy_clock = ((info->chip_rev >= CD1400_REV_J) ? 60000000 :
2966 25000000);
2967
2968 if (baud == 0) {
2969 info->tbpr = info->tco = info->rbpr = info->rco = 0;
2970 return;
2971 }
2972
2973 /* determine which prescaler to use */
2974 for (co = 4, co_val = 2048; co; co--, co_val >>= 2) {
2975 if (cy_clock / co_val / baud > 63)
2976 break;
2977 }
2978
2979 bpr = (cy_clock / co_val * 2 / baud + 1) / 2;
2980 if (bpr > 255)
2981 bpr = 255;
2982
2983 info->tbpr = info->rbpr = bpr;
2984 info->tco = info->rco = co;
2985 }
2986
2987 /*
2988 * This routine finds or computes the various line characteristics.
2989 * It used to be called config_setup
2990 */
2991 static void set_line_char(struct cyclades_port *info)
2992 {
2993 struct cyclades_card *card;
2994 unsigned long flags;
2995 void __iomem *base_addr;
2996 int chip, channel, index;
2997 unsigned cflag, iflag;
2998 unsigned short chip_number;
2999 int baud, baud_rate = 0;
3000 int i;
3001
3002 if (!info->tty || !info->tty->termios) {
3003 return;
3004 }
3005 if (info->line == -1) {
3006 return;
3007 }
3008 cflag = info->tty->termios->c_cflag;
3009 iflag = info->tty->termios->c_iflag;
3010
3011 /*
3012 * Set up the tty->alt_speed kludge
3013 */
3014 if (info->tty) {
3015 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
3016 info->tty->alt_speed = 57600;
3017 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
3018 info->tty->alt_speed = 115200;
3019 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
3020 info->tty->alt_speed = 230400;
3021 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
3022 info->tty->alt_speed = 460800;
3023 }
3024
3025 card = info->card;
3026 channel = info->line - card->first_line;
3027 chip_number = channel / 4;
3028
3029 if (!IS_CYC_Z(*card)) {
3030
3031 index = card->bus_index;
3032
3033 /* baud rate */
3034 baud = tty_get_baud_rate(info->tty);
3035 if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
3036 ASYNC_SPD_CUST) {
3037 if (info->custom_divisor)
3038 baud_rate = info->baud / info->custom_divisor;
3039 else
3040 baud_rate = info->baud;
3041 } else if (baud > CD1400_MAX_SPEED) {
3042 baud = CD1400_MAX_SPEED;
3043 }
3044 /* find the baud index */
3045 for (i = 0; i < 20; i++) {
3046 if (baud == baud_table[i]) {
3047 break;
3048 }
3049 }
3050 if (i == 20) {
3051 i = 19; /* CD1400_MAX_SPEED */
3052 }
3053
3054 if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
3055 ASYNC_SPD_CUST) {
3056 cyy_baud_calc(info, baud_rate);
3057 } else {
3058 if (info->chip_rev >= CD1400_REV_J) {
3059 /* It is a CD1400 rev. J or later */
3060 info->tbpr = baud_bpr_60[i]; /* Tx BPR */
3061 info->tco = baud_co_60[i]; /* Tx CO */
3062 info->rbpr = baud_bpr_60[i]; /* Rx BPR */
3063 info->rco = baud_co_60[i]; /* Rx CO */
3064 } else {
3065 info->tbpr = baud_bpr_25[i]; /* Tx BPR */
3066 info->tco = baud_co_25[i]; /* Tx CO */
3067 info->rbpr = baud_bpr_25[i]; /* Rx BPR */
3068 info->rco = baud_co_25[i]; /* Rx CO */
3069 }
3070 }
3071 if (baud_table[i] == 134) {
3072 /* get it right for 134.5 baud */
3073 info->timeout = (info->xmit_fifo_size * HZ * 30 / 269) +
3074 2;
3075 } else if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
3076 ASYNC_SPD_CUST) {
3077 info->timeout = (info->xmit_fifo_size * HZ * 15 /
3078 baud_rate) + 2;
3079 } else if (baud_table[i]) {
3080 info->timeout = (info->xmit_fifo_size * HZ * 15 /
3081 baud_table[i]) + 2;
3082 /* this needs to be propagated into the card info */
3083 } else {
3084 info->timeout = 0;
3085 }
3086 /* By tradition (is it a standard?) a baud rate of zero
3087 implies the line should be/has been closed. A bit
3088 later in this routine such a test is performed. */
3089
3090 /* byte size and parity */
3091 info->cor5 = 0;
3092 info->cor4 = 0;
3093 /* receive threshold */
3094 info->cor3 = (info->default_threshold ?
3095 info->default_threshold : baud_cor3[i]);
3096 info->cor2 = CyETC;
3097 switch (cflag & CSIZE) {
3098 case CS5:
3099 info->cor1 = Cy_5_BITS;
3100 break;
3101 case CS6:
3102 info->cor1 = Cy_6_BITS;
3103 break;
3104 case CS7:
3105 info->cor1 = Cy_7_BITS;
3106 break;
3107 case CS8:
3108 info->cor1 = Cy_8_BITS;
3109 break;
3110 }
3111 if (cflag & CSTOPB) {
3112 info->cor1 |= Cy_2_STOP;
3113 }
3114 if (cflag & PARENB) {
3115 if (cflag & PARODD) {
3116 info->cor1 |= CyPARITY_O;
3117 } else {
3118 info->cor1 |= CyPARITY_E;
3119 }
3120 } else {
3121 info->cor1 |= CyPARITY_NONE;
3122 }
3123
3124 /* CTS flow control flag */
3125 if (cflag & CRTSCTS) {
3126 info->flags |= ASYNC_CTS_FLOW;
3127 info->cor2 |= CyCtsAE;
3128 } else {
3129 info->flags &= ~ASYNC_CTS_FLOW;
3130 info->cor2 &= ~CyCtsAE;
3131 }
3132 if (cflag & CLOCAL)
3133 info->flags &= ~ASYNC_CHECK_CD;
3134 else
3135 info->flags |= ASYNC_CHECK_CD;
3136
3137 /***********************************************
3138 The hardware option, CyRtsAO, presents RTS when
3139 the chip has characters to send. Since most modems
3140 use RTS as reverse (inbound) flow control, this
3141 option is not used. If inbound flow control is
3142 necessary, DTR can be programmed to provide the
3143 appropriate signals for use with a non-standard
3144 cable. Contact Marcio Saito for details.
3145 ***********************************************/
3146
3147 chip = channel >> 2;
3148 channel &= 0x03;
3149 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3150
3151 spin_lock_irqsave(&card->card_lock, flags);
3152 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
3153
3154 /* tx and rx baud rate */
3155
3156 cy_writeb(base_addr + (CyTCOR << index), info->tco);
3157 cy_writeb(base_addr + (CyTBPR << index), info->tbpr);
3158 cy_writeb(base_addr + (CyRCOR << index), info->rco);
3159 cy_writeb(base_addr + (CyRBPR << index), info->rbpr);
3160
3161 /* set line characteristics according configuration */
3162
3163 cy_writeb(base_addr + (CySCHR1 << index),
3164 START_CHAR(info->tty));
3165 cy_writeb(base_addr + (CySCHR2 << index), STOP_CHAR(info->tty));
3166 cy_writeb(base_addr + (CyCOR1 << index), info->cor1);
3167 cy_writeb(base_addr + (CyCOR2 << index), info->cor2);
3168 cy_writeb(base_addr + (CyCOR3 << index), info->cor3);
3169 cy_writeb(base_addr + (CyCOR4 << index), info->cor4);
3170 cy_writeb(base_addr + (CyCOR5 << index), info->cor5);
3171
3172 cyy_issue_cmd(base_addr, CyCOR_CHANGE | CyCOR1ch | CyCOR2ch |
3173 CyCOR3ch, index);
3174
3175 cy_writeb(base_addr + (CyCAR << index), (u_char) channel); /* !!! Is this needed? */
3176 cy_writeb(base_addr + (CyRTPR << index),
3177 (info->default_timeout ? info->default_timeout : 0x02));
3178 /* 10ms rx timeout */
3179
3180 if (C_CLOCAL(info->tty)) {
3181 /* without modem intr */
3182 cy_writeb(base_addr + (CySRER << index),
3183 readb(base_addr + (CySRER << index)) | CyMdmCh);
3184 /* act on 1->0 modem transitions */
3185 if ((cflag & CRTSCTS) && info->rflow) {
3186 cy_writeb(base_addr + (CyMCOR1 << index),
3187 (CyCTS | rflow_thr[i]));
3188 } else {
3189 cy_writeb(base_addr + (CyMCOR1 << index),
3190 CyCTS);
3191 }
3192 /* act on 0->1 modem transitions */
3193 cy_writeb(base_addr + (CyMCOR2 << index), CyCTS);
3194 } else {
3195 /* without modem intr */
3196 cy_writeb(base_addr + (CySRER << index),
3197 readb(base_addr +
3198 (CySRER << index)) | CyMdmCh);
3199 /* act on 1->0 modem transitions */
3200 if ((cflag & CRTSCTS) && info->rflow) {
3201 cy_writeb(base_addr + (CyMCOR1 << index),
3202 (CyDSR | CyCTS | CyRI | CyDCD |
3203 rflow_thr[i]));
3204 } else {
3205 cy_writeb(base_addr + (CyMCOR1 << index),
3206 CyDSR | CyCTS | CyRI | CyDCD);
3207 }
3208 /* act on 0->1 modem transitions */
3209 cy_writeb(base_addr + (CyMCOR2 << index),
3210 CyDSR | CyCTS | CyRI | CyDCD);
3211 }
3212
3213 if (i == 0) { /* baud rate is zero, turn off line */
3214 if (info->rtsdtr_inv) {
3215 cy_writeb(base_addr + (CyMSVR1 << index),
3216 ~CyRTS);
3217 } else {
3218 cy_writeb(base_addr + (CyMSVR2 << index),
3219 ~CyDTR);
3220 }
3221 #ifdef CY_DEBUG_DTR
3222 printk(KERN_DEBUG "cyc:set_line_char dropping DTR\n");
3223 printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
3224 readb(base_addr + (CyMSVR1 << index)),
3225 readb(base_addr + (CyMSVR2 << index)));
3226 #endif
3227 } else {
3228 if (info->rtsdtr_inv) {
3229 cy_writeb(base_addr + (CyMSVR1 << index),
3230 CyRTS);
3231 } else {
3232 cy_writeb(base_addr + (CyMSVR2 << index),
3233 CyDTR);
3234 }
3235 #ifdef CY_DEBUG_DTR
3236 printk(KERN_DEBUG "cyc:set_line_char raising DTR\n");
3237 printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
3238 readb(base_addr + (CyMSVR1 << index)),
3239 readb(base_addr + (CyMSVR2 << index)));
3240 #endif
3241 }
3242
3243 if (info->tty) {
3244 clear_bit(TTY_IO_ERROR, &info->tty->flags);
3245 }
3246 spin_unlock_irqrestore(&card->card_lock, flags);
3247
3248 } else {
3249 struct FIRM_ID __iomem *firm_id;
3250 struct ZFW_CTRL __iomem *zfw_ctrl;
3251 struct BOARD_CTRL __iomem *board_ctrl;
3252 struct CH_CTRL __iomem *ch_ctrl;
3253 struct BUF_CTRL __iomem *buf_ctrl;
3254 __u32 sw_flow;
3255 int retval;
3256
3257 firm_id = card->base_addr + ID_ADDRESS;
3258 if (!ISZLOADED(*card)) {
3259 return;
3260 }
3261
3262 zfw_ctrl = card->base_addr +
3263 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
3264 board_ctrl = &zfw_ctrl->board_ctrl;
3265 ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]);
3266 buf_ctrl = &zfw_ctrl->buf_ctrl[channel];
3267
3268 /* baud rate */
3269 baud = tty_get_baud_rate(info->tty);
3270 if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
3271 ASYNC_SPD_CUST) {
3272 if (info->custom_divisor)
3273 baud_rate = info->baud / info->custom_divisor;
3274 else
3275 baud_rate = info->baud;
3276 } else if (baud > CYZ_MAX_SPEED) {
3277 baud = CYZ_MAX_SPEED;
3278 }
3279 cy_writel(&ch_ctrl->comm_baud, baud);
3280
3281 if (baud == 134) {
3282 /* get it right for 134.5 baud */
3283 info->timeout = (info->xmit_fifo_size * HZ * 30 / 269) +
3284 2;
3285 } else if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
3286 ASYNC_SPD_CUST) {
3287 info->timeout = (info->xmit_fifo_size * HZ * 15 /
3288 baud_rate) + 2;
3289 } else if (baud) {
3290 info->timeout = (info->xmit_fifo_size * HZ * 15 /
3291 baud) + 2;
3292 /* this needs to be propagated into the card info */
3293 } else {
3294 info->timeout = 0;
3295 }
3296
3297 /* byte size and parity */
3298 switch (cflag & CSIZE) {
3299 case CS5:
3300 cy_writel(&ch_ctrl->comm_data_l, C_DL_CS5);
3301 break;
3302 case CS6:
3303 cy_writel(&ch_ctrl->comm_data_l, C_DL_CS6);
3304 break;
3305 case CS7:
3306 cy_writel(&ch_ctrl->comm_data_l, C_DL_CS7);
3307 break;
3308 case CS8:
3309 cy_writel(&ch_ctrl->comm_data_l, C_DL_CS8);
3310 break;
3311 }
3312 if (cflag & CSTOPB) {
3313 cy_writel(&ch_ctrl->comm_data_l,
3314 readl(&ch_ctrl->comm_data_l) | C_DL_2STOP);
3315 } else {
3316 cy_writel(&ch_ctrl->comm_data_l,
3317 readl(&ch_ctrl->comm_data_l) | C_DL_1STOP);
3318 }
3319 if (cflag & PARENB) {
3320 if (cflag & PARODD) {
3321 cy_writel(&ch_ctrl->comm_parity, C_PR_ODD);
3322 } else {
3323 cy_writel(&ch_ctrl->comm_parity, C_PR_EVEN);
3324 }
3325 } else {
3326 cy_writel(&ch_ctrl->comm_parity, C_PR_NONE);
3327 }
3328
3329 /* CTS flow control flag */
3330 if (cflag & CRTSCTS) {
3331 cy_writel(&ch_ctrl->hw_flow,
3332 readl(&ch_ctrl->hw_flow) | C_RS_CTS | C_RS_RTS);
3333 } else {
3334 cy_writel(&ch_ctrl->hw_flow, readl(&ch_ctrl->hw_flow) &
3335 ~(C_RS_CTS | C_RS_RTS));
3336 }
3337 /* As the HW flow control is done in firmware, the driver
3338 doesn't need to care about it */
3339 info->flags &= ~ASYNC_CTS_FLOW;
3340
3341 /* XON/XOFF/XANY flow control flags */
3342 sw_flow = 0;
3343 if (iflag & IXON) {
3344 sw_flow |= C_FL_OXX;
3345 if (iflag & IXANY)
3346 sw_flow |= C_FL_OIXANY;
3347 }
3348 cy_writel(&ch_ctrl->sw_flow, sw_flow);
3349
3350 retval = cyz_issue_cmd(card, channel, C_CM_IOCTL, 0L);
3351 if (retval != 0) {
3352 printk(KERN_ERR "cyc:set_line_char retval on ttyC%d "
3353 "was %x\n", info->line, retval);
3354 }
3355
3356 /* CD sensitivity */
3357 if (cflag & CLOCAL) {
3358 info->flags &= ~ASYNC_CHECK_CD;
3359 } else {
3360 info->flags |= ASYNC_CHECK_CD;
3361 }
3362
3363 if (baud == 0) { /* baud rate is zero, turn off line */
3364 cy_writel(&ch_ctrl->rs_control,
3365 readl(&ch_ctrl->rs_control) & ~C_RS_DTR);
3366 #ifdef CY_DEBUG_DTR
3367 printk(KERN_DEBUG "cyc:set_line_char dropping Z DTR\n");
3368 #endif
3369 } else {
3370 cy_writel(&ch_ctrl->rs_control,
3371 readl(&ch_ctrl->rs_control) | C_RS_DTR);
3372 #ifdef CY_DEBUG_DTR
3373 printk(KERN_DEBUG "cyc:set_line_char raising Z DTR\n");
3374 #endif
3375 }
3376
3377 retval = cyz_issue_cmd(card, channel, C_CM_IOCTLM,0L);
3378 if (retval != 0) {
3379 printk(KERN_ERR "cyc:set_line_char(2) retval on ttyC%d "
3380 "was %x\n", info->line, retval);
3381 }
3382
3383 if (info->tty) {
3384 clear_bit(TTY_IO_ERROR, &info->tty->flags);
3385 }
3386 }
3387 } /* set_line_char */
3388
3389 static int
3390 get_serial_info(struct cyclades_port *info,
3391 struct serial_struct __user * retinfo)
3392 {
3393 struct serial_struct tmp;
3394 struct cyclades_card *cinfo = info->card;
3395
3396 if (!retinfo)
3397 return -EFAULT;
3398 memset(&tmp, 0, sizeof(tmp));
3399 tmp.type = info->type;
3400 tmp.line = info->line;
3401 tmp.port = (info->card - cy_card) * 0x100 + info->line -
3402 cinfo->first_line;
3403 tmp.irq = cinfo->irq;
3404 tmp.flags = info->flags;
3405 tmp.close_delay = info->close_delay;
3406 tmp.closing_wait = info->closing_wait;
3407 tmp.baud_base = info->baud;
3408 tmp.custom_divisor = info->custom_divisor;
3409 tmp.hub6 = 0; /*!!! */
3410 return copy_to_user(retinfo, &tmp, sizeof(*retinfo)) ? -EFAULT : 0;
3411 } /* get_serial_info */
3412
3413 static int
3414 set_serial_info(struct cyclades_port *info,
3415 struct serial_struct __user * new_info)
3416 {
3417 struct serial_struct new_serial;
3418 struct cyclades_port old_info;
3419
3420 if (copy_from_user(&new_serial, new_info, sizeof(new_serial)))
3421 return -EFAULT;
3422 old_info = *info;
3423
3424 if (!capable(CAP_SYS_ADMIN)) {
3425 if (new_serial.close_delay != info->close_delay ||
3426 new_serial.baud_base != info->baud ||
3427 (new_serial.flags & ASYNC_FLAGS &
3428 ~ASYNC_USR_MASK) !=
3429 (info->flags & ASYNC_FLAGS & ~ASYNC_USR_MASK))
3430 return -EPERM;
3431 info->flags = (info->flags & ~ASYNC_USR_MASK) |
3432 (new_serial.flags & ASYNC_USR_MASK);
3433 info->baud = new_serial.baud_base;
3434 info->custom_divisor = new_serial.custom_divisor;
3435 goto check_and_exit;
3436 }
3437
3438 /*
3439 * OK, past this point, all the error checking has been done.
3440 * At this point, we start making changes.....
3441 */
3442
3443 info->baud = new_serial.baud_base;
3444 info->custom_divisor = new_serial.custom_divisor;
3445 info->flags = (info->flags & ~ASYNC_FLAGS) |
3446 (new_serial.flags & ASYNC_FLAGS);
3447 info->close_delay = new_serial.close_delay * HZ / 100;
3448 info->closing_wait = new_serial.closing_wait * HZ / 100;
3449
3450 check_and_exit:
3451 if (info->flags & ASYNC_INITIALIZED) {
3452 set_line_char(info);
3453 return 0;
3454 } else {
3455 return startup(info);
3456 }
3457 } /* set_serial_info */
3458
3459 /*
3460 * get_lsr_info - get line status register info
3461 *
3462 * Purpose: Let user call ioctl() to get info when the UART physically
3463 * is emptied. On bus types like RS485, the transmitter must
3464 * release the bus after transmitting. This must be done when
3465 * the transmit shift register is empty, not be done when the
3466 * transmit holding register is empty. This functionality
3467 * allows an RS485 driver to be written in user space.
3468 */
3469 static int get_lsr_info(struct cyclades_port *info, unsigned int __user * value)
3470 {
3471 struct cyclades_card *card;
3472 int chip, channel, index;
3473 unsigned char status;
3474 unsigned int result;
3475 unsigned long flags;
3476 void __iomem *base_addr;
3477
3478 card = info->card;
3479 channel = (info->line) - (card->first_line);
3480 if (!IS_CYC_Z(*card)) {
3481 chip = channel >> 2;
3482 channel &= 0x03;
3483 index = card->bus_index;
3484 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3485
3486 spin_lock_irqsave(&card->card_lock, flags);
3487 status = readb(base_addr + (CySRER << index)) &
3488 (CyTxRdy | CyTxMpty);
3489 spin_unlock_irqrestore(&card->card_lock, flags);
3490 result = (status ? 0 : TIOCSER_TEMT);
3491 } else {
3492 /* Not supported yet */
3493 return -EINVAL;
3494 }
3495 return put_user(result, (unsigned long __user *)value);
3496 }
3497
3498 static int cy_tiocmget(struct tty_struct *tty, struct file *file)
3499 {
3500 struct cyclades_port *info = tty->driver_data;
3501 struct cyclades_card *card;
3502 int chip, channel, index;
3503 void __iomem *base_addr;
3504 unsigned long flags;
3505 unsigned char status;
3506 unsigned long lstatus;
3507 unsigned int result;
3508 struct FIRM_ID __iomem *firm_id;
3509 struct ZFW_CTRL __iomem *zfw_ctrl;
3510 struct BOARD_CTRL __iomem *board_ctrl;
3511 struct CH_CTRL __iomem *ch_ctrl;
3512
3513 if (serial_paranoia_check(info, tty->name, __FUNCTION__))
3514 return -ENODEV;
3515
3516 card = info->card;
3517 channel = info->line - card->first_line;
3518 if (!IS_CYC_Z(*card)) {
3519 chip = channel >> 2;
3520 channel &= 0x03;
3521 index = card->bus_index;
3522 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3523
3524 spin_lock_irqsave(&card->card_lock, flags);
3525 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
3526 status = readb(base_addr + (CyMSVR1 << index));
3527 status |= readb(base_addr + (CyMSVR2 << index));
3528 spin_unlock_irqrestore(&card->card_lock, flags);
3529
3530 if (info->rtsdtr_inv) {
3531 result = ((status & CyRTS) ? TIOCM_DTR : 0) |
3532 ((status & CyDTR) ? TIOCM_RTS : 0);
3533 } else {
3534 result = ((status & CyRTS) ? TIOCM_RTS : 0) |
3535 ((status & CyDTR) ? TIOCM_DTR : 0);
3536 }
3537 result |= ((status & CyDCD) ? TIOCM_CAR : 0) |
3538 ((status & CyRI) ? TIOCM_RNG : 0) |
3539 ((status & CyDSR) ? TIOCM_DSR : 0) |
3540 ((status & CyCTS) ? TIOCM_CTS : 0);
3541 } else {
3542 base_addr = card->base_addr;
3543 firm_id = card->base_addr + ID_ADDRESS;
3544 if (ISZLOADED(*card)) {
3545 zfw_ctrl = card->base_addr +
3546 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
3547 board_ctrl = &zfw_ctrl->board_ctrl;
3548 ch_ctrl = zfw_ctrl->ch_ctrl;
3549 lstatus = readl(&ch_ctrl[channel].rs_status);
3550 result = ((lstatus & C_RS_RTS) ? TIOCM_RTS : 0) |
3551 ((lstatus & C_RS_DTR) ? TIOCM_DTR : 0) |
3552 ((lstatus & C_RS_DCD) ? TIOCM_CAR : 0) |
3553 ((lstatus & C_RS_RI) ? TIOCM_RNG : 0) |
3554 ((lstatus & C_RS_DSR) ? TIOCM_DSR : 0) |
3555 ((lstatus & C_RS_CTS) ? TIOCM_CTS : 0);
3556 } else {
3557 result = 0;
3558 return -ENODEV;
3559 }
3560
3561 }
3562 return result;
3563 } /* cy_tiomget */
3564
3565 static int
3566 cy_tiocmset(struct tty_struct *tty, struct file *file,
3567 unsigned int set, unsigned int clear)
3568 {
3569 struct cyclades_port *info = tty->driver_data;
3570 struct cyclades_card *card;
3571 int chip, channel, index;
3572 void __iomem *base_addr;
3573 unsigned long flags;
3574 struct FIRM_ID __iomem *firm_id;
3575 struct ZFW_CTRL __iomem *zfw_ctrl;
3576 struct BOARD_CTRL __iomem *board_ctrl;
3577 struct CH_CTRL __iomem *ch_ctrl;
3578 int retval;
3579
3580 if (serial_paranoia_check(info, tty->name, __FUNCTION__))
3581 return -ENODEV;
3582
3583 card = info->card;
3584 channel = (info->line) - (card->first_line);
3585 if (!IS_CYC_Z(*card)) {
3586 chip = channel >> 2;
3587 channel &= 0x03;
3588 index = card->bus_index;
3589 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3590
3591 if (set & TIOCM_RTS) {
3592 spin_lock_irqsave(&card->card_lock, flags);
3593 cy_writeb(base_addr + (CyCAR << index),
3594 (u_char) channel);
3595 if (info->rtsdtr_inv) {
3596 cy_writeb(base_addr + (CyMSVR2 << index),
3597 CyDTR);
3598 } else {
3599 cy_writeb(base_addr + (CyMSVR1 << index),
3600 CyRTS);
3601 }
3602 spin_unlock_irqrestore(&card->card_lock, flags);
3603 }
3604 if (clear & TIOCM_RTS) {
3605 spin_lock_irqsave(&card->card_lock, flags);
3606 cy_writeb(base_addr + (CyCAR << index),
3607 (u_char) channel);
3608 if (info->rtsdtr_inv) {
3609 cy_writeb(base_addr + (CyMSVR2 << index),
3610 ~CyDTR);
3611 } else {
3612 cy_writeb(base_addr + (CyMSVR1 << index),
3613 ~CyRTS);
3614 }
3615 spin_unlock_irqrestore(&card->card_lock, flags);
3616 }
3617 if (set & TIOCM_DTR) {
3618 spin_lock_irqsave(&card->card_lock, flags);
3619 cy_writeb(base_addr + (CyCAR << index),
3620 (u_char) channel);
3621 if (info->rtsdtr_inv) {
3622 cy_writeb(base_addr + (CyMSVR1 << index),
3623 CyRTS);
3624 } else {
3625 cy_writeb(base_addr + (CyMSVR2 << index),
3626 CyDTR);
3627 }
3628 #ifdef CY_DEBUG_DTR
3629 printk(KERN_DEBUG "cyc:set_modem_info raising DTR\n");
3630 printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
3631 readb(base_addr + (CyMSVR1 << index)),
3632 readb(base_addr + (CyMSVR2 << index)));
3633 #endif
3634 spin_unlock_irqrestore(&card->card_lock, flags);
3635 }
3636 if (clear & TIOCM_DTR) {
3637 spin_lock_irqsave(&card->card_lock, flags);
3638 cy_writeb(base_addr + (CyCAR << index),
3639 (u_char) channel);
3640 if (info->rtsdtr_inv) {
3641 cy_writeb(base_addr + (CyMSVR1 << index),
3642 ~CyRTS);
3643 } else {
3644 cy_writeb(base_addr + (CyMSVR2 << index),
3645 ~CyDTR);
3646 }
3647
3648 #ifdef CY_DEBUG_DTR
3649 printk(KERN_DEBUG "cyc:set_modem_info dropping DTR\n");
3650 printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
3651 readb(base_addr + (CyMSVR1 << index)),
3652 readb(base_addr + (CyMSVR2 << index)));
3653 #endif
3654 spin_unlock_irqrestore(&card->card_lock, flags);
3655 }
3656 } else {
3657 base_addr = card->base_addr;
3658
3659 firm_id = card->base_addr + ID_ADDRESS;
3660 if (ISZLOADED(*card)) {
3661 zfw_ctrl = card->base_addr +
3662 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
3663 board_ctrl = &zfw_ctrl->board_ctrl;
3664 ch_ctrl = zfw_ctrl->ch_ctrl;
3665
3666 if (set & TIOCM_RTS) {
3667 spin_lock_irqsave(&card->card_lock, flags);
3668 cy_writel(&ch_ctrl[channel].rs_control,
3669 readl(&ch_ctrl[channel].rs_control) |
3670 C_RS_RTS);
3671 spin_unlock_irqrestore(&card->card_lock, flags);
3672 }
3673 if (clear & TIOCM_RTS) {
3674 spin_lock_irqsave(&card->card_lock, flags);
3675 cy_writel(&ch_ctrl[channel].rs_control,
3676 readl(&ch_ctrl[channel].rs_control) &
3677 ~C_RS_RTS);
3678 spin_unlock_irqrestore(&card->card_lock, flags);
3679 }
3680 if (set & TIOCM_DTR) {
3681 spin_lock_irqsave(&card->card_lock, flags);
3682 cy_writel(&ch_ctrl[channel].rs_control,
3683 readl(&ch_ctrl[channel].rs_control) |
3684 C_RS_DTR);
3685 #ifdef CY_DEBUG_DTR
3686 printk(KERN_DEBUG "cyc:set_modem_info raising "
3687 "Z DTR\n");
3688 #endif
3689 spin_unlock_irqrestore(&card->card_lock, flags);
3690 }
3691 if (clear & TIOCM_DTR) {
3692 spin_lock_irqsave(&card->card_lock, flags);
3693 cy_writel(&ch_ctrl[channel].rs_control,
3694 readl(&ch_ctrl[channel].rs_control) &
3695 ~C_RS_DTR);
3696 #ifdef CY_DEBUG_DTR
3697 printk(KERN_DEBUG "cyc:set_modem_info clearing "
3698 "Z DTR\n");
3699 #endif
3700 spin_unlock_irqrestore(&card->card_lock, flags);
3701 }
3702 } else {
3703 return -ENODEV;
3704 }
3705 spin_lock_irqsave(&card->card_lock, flags);
3706 retval = cyz_issue_cmd(card, channel, C_CM_IOCTLM, 0L);
3707 if (retval != 0) {
3708 printk(KERN_ERR "cyc:set_modem_info retval on ttyC%d "
3709 "was %x\n", info->line, retval);
3710 }
3711 spin_unlock_irqrestore(&card->card_lock, flags);
3712 }
3713 return 0;
3714 } /* cy_tiocmset */
3715
3716 /*
3717 * cy_break() --- routine which turns the break handling on or off
3718 */
3719 static void cy_break(struct tty_struct *tty, int break_state)
3720 {
3721 struct cyclades_port *info = tty->driver_data;
3722 struct cyclades_card *card;
3723 unsigned long flags;
3724
3725 if (serial_paranoia_check(info, tty->name, "cy_break"))
3726 return;
3727
3728 card = info->card;
3729
3730 spin_lock_irqsave(&card->card_lock, flags);
3731 if (!IS_CYC_Z(*card)) {
3732 /* Let the transmit ISR take care of this (since it
3733 requires stuffing characters into the output stream).
3734 */
3735 if (break_state == -1) {
3736 if (!info->breakon) {
3737 info->breakon = 1;
3738 if (!info->xmit_cnt) {
3739 spin_unlock_irqrestore(&card->card_lock, flags);
3740 start_xmit(info);
3741 spin_lock_irqsave(&card->card_lock, flags);
3742 }
3743 }
3744 } else {
3745 if (!info->breakoff) {
3746 info->breakoff = 1;
3747 if (!info->xmit_cnt) {
3748 spin_unlock_irqrestore(&card->card_lock, flags);
3749 start_xmit(info);
3750 spin_lock_irqsave(&card->card_lock, flags);
3751 }
3752 }
3753 }
3754 } else {
3755 int retval;
3756
3757 if (break_state == -1) {
3758 retval = cyz_issue_cmd(card,
3759 info->line - card->first_line,
3760 C_CM_SET_BREAK, 0L);
3761 if (retval != 0) {
3762 printk(KERN_ERR "cyc:cy_break (set) retval on "
3763 "ttyC%d was %x\n", info->line, retval);
3764 }
3765 } else {
3766 retval = cyz_issue_cmd(card,
3767 info->line - card->first_line,
3768 C_CM_CLR_BREAK, 0L);
3769 if (retval != 0) {
3770 printk(KERN_DEBUG "cyc:cy_break (clr) retval "
3771 "on ttyC%d was %x\n", info->line,
3772 retval);
3773 }
3774 }
3775 }
3776 spin_unlock_irqrestore(&card->card_lock, flags);
3777 } /* cy_break */
3778
3779 static int
3780 get_mon_info(struct cyclades_port *info, struct cyclades_monitor __user * mon)
3781 {
3782
3783 if (copy_to_user(mon, &info->mon, sizeof(struct cyclades_monitor)))
3784 return -EFAULT;
3785 info->mon.int_count = 0;
3786 info->mon.char_count = 0;
3787 info->mon.char_max = 0;
3788 info->mon.char_last = 0;
3789 return 0;
3790 } /* get_mon_info */
3791
3792 static int set_threshold(struct cyclades_port *info, unsigned long value)
3793 {
3794 struct cyclades_card *card;
3795 void __iomem *base_addr;
3796 int channel, chip, index;
3797 unsigned long flags;
3798
3799 card = info->card;
3800 channel = info->line - card->first_line;
3801 if (!IS_CYC_Z(*card)) {
3802 chip = channel >> 2;
3803 channel &= 0x03;
3804 index = card->bus_index;
3805 base_addr =
3806 card->base_addr + (cy_chip_offset[chip] << index);
3807
3808 info->cor3 &= ~CyREC_FIFO;
3809 info->cor3 |= value & CyREC_FIFO;
3810
3811 spin_lock_irqsave(&card->card_lock, flags);
3812 cy_writeb(base_addr + (CyCOR3 << index), info->cor3);
3813 cyy_issue_cmd(base_addr, CyCOR_CHANGE | CyCOR3ch, index);
3814 spin_unlock_irqrestore(&card->card_lock, flags);
3815 }
3816 return 0;
3817 } /* set_threshold */
3818
3819 static int
3820 get_threshold(struct cyclades_port *info, unsigned long __user * value)
3821 {
3822 struct cyclades_card *card;
3823 void __iomem *base_addr;
3824 int channel, chip, index;
3825 unsigned long tmp;
3826
3827 card = info->card;
3828 channel = info->line - card->first_line;
3829 if (!IS_CYC_Z(*card)) {
3830 chip = channel >> 2;
3831 channel &= 0x03;
3832 index = card->bus_index;
3833 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3834
3835 tmp = readb(base_addr + (CyCOR3 << index)) & CyREC_FIFO;
3836 return put_user(tmp, value);
3837 }
3838 return 0;
3839 } /* get_threshold */
3840
3841 static int
3842 set_default_threshold(struct cyclades_port *info, unsigned long value)
3843 {
3844 info->default_threshold = value & 0x0f;
3845 return 0;
3846 } /* set_default_threshold */
3847
3848 static int
3849 get_default_threshold(struct cyclades_port *info, unsigned long __user * value)
3850 {
3851 return put_user(info->default_threshold, value);
3852 } /* get_default_threshold */
3853
3854 static int set_timeout(struct cyclades_port *info, unsigned long value)
3855 {
3856 struct cyclades_card *card;
3857 void __iomem *base_addr;
3858 int channel, chip, index;
3859 unsigned long flags;
3860
3861 card = info->card;
3862 channel = info->line - card->first_line;
3863 if (!IS_CYC_Z(*card)) {
3864 chip = channel >> 2;
3865 channel &= 0x03;
3866 index = card->bus_index;
3867 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3868
3869 spin_lock_irqsave(&card->card_lock, flags);
3870 cy_writeb(base_addr + (CyRTPR << index), value & 0xff);
3871 spin_unlock_irqrestore(&card->card_lock, flags);
3872 }
3873 return 0;
3874 } /* set_timeout */
3875
3876 static int get_timeout(struct cyclades_port *info, unsigned long __user * value)
3877 {
3878 struct cyclades_card *card;
3879 void __iomem *base_addr;
3880 int channel, chip, index;
3881 unsigned long tmp;
3882
3883 card = info->card;
3884 channel = info->line - card->first_line;
3885 if (!IS_CYC_Z(*card)) {
3886 chip = channel >> 2;
3887 channel &= 0x03;
3888 index = card->bus_index;
3889 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3890
3891 tmp = readb(base_addr + (CyRTPR << index));
3892 return put_user(tmp, value);
3893 }
3894 return 0;
3895 } /* get_timeout */
3896
3897 static int set_default_timeout(struct cyclades_port *info, unsigned long value)
3898 {
3899 info->default_timeout = value & 0xff;
3900 return 0;
3901 } /* set_default_timeout */
3902
3903 static int
3904 get_default_timeout(struct cyclades_port *info, unsigned long __user * value)
3905 {
3906 return put_user(info->default_timeout, value);
3907 } /* get_default_timeout */
3908
3909 /*
3910 * This routine allows the tty driver to implement device-
3911 * specific ioctl's. If the ioctl number passed in cmd is
3912 * not recognized by the driver, it should return ENOIOCTLCMD.
3913 */
3914 static int
3915 cy_ioctl(struct tty_struct *tty, struct file *file,
3916 unsigned int cmd, unsigned long arg)
3917 {
3918 struct cyclades_port *info = tty->driver_data;
3919 struct cyclades_icount cprev, cnow; /* kernel counter temps */
3920 struct serial_icounter_struct __user *p_cuser; /* user space */
3921 int ret_val = 0;
3922 unsigned long flags;
3923 void __user *argp = (void __user *)arg;
3924
3925 if (serial_paranoia_check(info, tty->name, "cy_ioctl"))
3926 return -ENODEV;
3927
3928 #ifdef CY_DEBUG_OTHER
3929 printk(KERN_DEBUG "cyc:cy_ioctl ttyC%d, cmd = %x arg = %lx\n",
3930 info->line, cmd, arg);
3931 #endif
3932
3933 switch (cmd) {
3934 case CYGETMON:
3935 ret_val = get_mon_info(info, argp);
3936 break;
3937 case CYGETTHRESH:
3938 ret_val = get_threshold(info, argp);
3939 break;
3940 case CYSETTHRESH:
3941 ret_val = set_threshold(info, arg);
3942 break;
3943 case CYGETDEFTHRESH:
3944 ret_val = get_default_threshold(info, argp);
3945 break;
3946 case CYSETDEFTHRESH:
3947 ret_val = set_default_threshold(info, arg);
3948 break;
3949 case CYGETTIMEOUT:
3950 ret_val = get_timeout(info, argp);
3951 break;
3952 case CYSETTIMEOUT:
3953 ret_val = set_timeout(info, arg);
3954 break;
3955 case CYGETDEFTIMEOUT:
3956 ret_val = get_default_timeout(info, argp);
3957 break;
3958 case CYSETDEFTIMEOUT:
3959 ret_val = set_default_timeout(info, arg);
3960 break;
3961 case CYSETRFLOW:
3962 info->rflow = (int)arg;
3963 ret_val = 0;
3964 break;
3965 case CYGETRFLOW:
3966 ret_val = info->rflow;
3967 break;
3968 case CYSETRTSDTR_INV:
3969 info->rtsdtr_inv = (int)arg;
3970 ret_val = 0;
3971 break;
3972 case CYGETRTSDTR_INV:
3973 ret_val = info->rtsdtr_inv;
3974 break;
3975 case CYGETCD1400VER:
3976 ret_val = info->chip_rev;
3977 break;
3978 #ifndef CONFIG_CYZ_INTR
3979 case CYZSETPOLLCYCLE:
3980 cyz_polling_cycle = (arg * HZ) / 1000;
3981 ret_val = 0;
3982 break;
3983 case CYZGETPOLLCYCLE:
3984 ret_val = (cyz_polling_cycle * 1000) / HZ;
3985 break;
3986 #endif /* CONFIG_CYZ_INTR */
3987 case CYSETWAIT:
3988 info->closing_wait = (unsigned short)arg *HZ / 100;
3989 ret_val = 0;
3990 break;
3991 case CYGETWAIT:
3992 ret_val = info->closing_wait / (HZ / 100);
3993 break;
3994 case TIOCGSERIAL:
3995 ret_val = get_serial_info(info, argp);
3996 break;
3997 case TIOCSSERIAL:
3998 ret_val = set_serial_info(info, argp);
3999 break;
4000 case TIOCSERGETLSR: /* Get line status register */
4001 ret_val = get_lsr_info(info, argp);
4002 break;
4003 /*
4004 * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
4005 * - mask passed in arg for lines of interest
4006 * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
4007 * Caller should use TIOCGICOUNT to see which one it was
4008 */
4009 case TIOCMIWAIT:
4010 spin_lock_irqsave(&info->card->card_lock, flags);
4011 /* note the counters on entry */
4012 cnow = info->icount;
4013 spin_unlock_irqrestore(&info->card->card_lock, flags);
4014 ret_val = wait_event_interruptible(info->delta_msr_wait, ({
4015 cprev = cnow;
4016 spin_lock_irqsave(&info->card->card_lock, flags);
4017 cnow = info->icount; /* atomic copy */
4018 spin_unlock_irqrestore(&info->card->card_lock, flags);
4019
4020 ((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
4021 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
4022 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) ||
4023 ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts));
4024 }));
4025 break;
4026
4027 /*
4028 * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
4029 * Return: write counters to the user passed counter struct
4030 * NB: both 1->0 and 0->1 transitions are counted except for
4031 * RI where only 0->1 is counted.
4032 */
4033 case TIOCGICOUNT:
4034 spin_lock_irqsave(&info->card->card_lock, flags);
4035 cnow = info->icount;
4036 spin_unlock_irqrestore(&info->card->card_lock, flags);
4037 p_cuser = argp;
4038 ret_val = put_user(cnow.cts, &p_cuser->cts);
4039 if (ret_val)
4040 return ret_val;
4041 ret_val = put_user(cnow.dsr, &p_cuser->dsr);
4042 if (ret_val)
4043 return ret_val;
4044 ret_val = put_user(cnow.rng, &p_cuser->rng);
4045 if (ret_val)
4046 return ret_val;
4047 ret_val = put_user(cnow.dcd, &p_cuser->dcd);
4048 if (ret_val)
4049 return ret_val;
4050 ret_val = put_user(cnow.rx, &p_cuser->rx);
4051 if (ret_val)
4052 return ret_val;
4053 ret_val = put_user(cnow.tx, &p_cuser->tx);
4054 if (ret_val)
4055 return ret_val;
4056 ret_val = put_user(cnow.frame, &p_cuser->frame);
4057 if (ret_val)
4058 return ret_val;
4059 ret_val = put_user(cnow.overrun, &p_cuser->overrun);
4060 if (ret_val)
4061 return ret_val;
4062 ret_val = put_user(cnow.parity, &p_cuser->parity);
4063 if (ret_val)
4064 return ret_val;
4065 ret_val = put_user(cnow.brk, &p_cuser->brk);
4066 if (ret_val)
4067 return ret_val;
4068 ret_val = put_user(cnow.buf_overrun, &p_cuser->buf_overrun);
4069 if (ret_val)
4070 return ret_val;
4071 ret_val = 0;
4072 break;
4073 default:
4074 ret_val = -ENOIOCTLCMD;
4075 }
4076
4077 #ifdef CY_DEBUG_OTHER
4078 printk(KERN_DEBUG "cyc:cy_ioctl done\n");
4079 #endif
4080
4081 return ret_val;
4082 } /* cy_ioctl */
4083
4084 /*
4085 * This routine allows the tty driver to be notified when
4086 * device's termios settings have changed. Note that a
4087 * well-designed tty driver should be prepared to accept the case
4088 * where old == NULL, and try to do something rational.
4089 */
4090 static void cy_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
4091 {
4092 struct cyclades_port *info = tty->driver_data;
4093
4094 #ifdef CY_DEBUG_OTHER
4095 printk(KERN_DEBUG "cyc:cy_set_termios ttyC%d\n", info->line);
4096 #endif
4097
4098 set_line_char(info);
4099
4100 if ((old_termios->c_cflag & CRTSCTS) &&
4101 !(tty->termios->c_cflag & CRTSCTS)) {
4102 tty->hw_stopped = 0;
4103 cy_start(tty);
4104 }
4105 #if 0
4106 /*
4107 * No need to wake up processes in open wait, since they
4108 * sample the CLOCAL flag once, and don't recheck it.
4109 * XXX It's not clear whether the current behavior is correct
4110 * or not. Hence, this may change.....
4111 */
4112 if (!(old_termios->c_cflag & CLOCAL) &&
4113 (tty->termios->c_cflag & CLOCAL))
4114 wake_up_interruptible(&info->open_wait);
4115 #endif
4116 } /* cy_set_termios */
4117
4118 /* This function is used to send a high-priority XON/XOFF character to
4119 the device.
4120 */
4121 static void cy_send_xchar(struct tty_struct *tty, char ch)
4122 {
4123 struct cyclades_port *info = tty->driver_data;
4124 struct cyclades_card *card;
4125 int channel;
4126
4127 if (serial_paranoia_check(info, tty->name, "cy_send_xchar"))
4128 return;
4129
4130 info->x_char = ch;
4131
4132 if (ch)
4133 cy_start(tty);
4134
4135 card = info->card;
4136 channel = info->line - card->first_line;
4137
4138 if (IS_CYC_Z(*card)) {
4139 if (ch == STOP_CHAR(tty))
4140 cyz_issue_cmd(card, channel, C_CM_SENDXOFF, 0L);
4141 else if (ch == START_CHAR(tty))
4142 cyz_issue_cmd(card, channel, C_CM_SENDXON, 0L);
4143 }
4144 }
4145
4146 /* This routine is called by the upper-layer tty layer to signal
4147 that incoming characters should be throttled because the input
4148 buffers are close to full.
4149 */
4150 static void cy_throttle(struct tty_struct *tty)
4151 {
4152 struct cyclades_port *info = tty->driver_data;
4153 struct cyclades_card *card;
4154 unsigned long flags;
4155 void __iomem *base_addr;
4156 int chip, channel, index;
4157
4158 #ifdef CY_DEBUG_THROTTLE
4159 char buf[64];
4160
4161 printk(KERN_DEBUG "cyc:throttle %s: %ld...ttyC%d\n", tty_name(tty, buf),
4162 tty->ldisc.chars_in_buffer(tty), info->line);
4163 #endif
4164
4165 if (serial_paranoia_check(info, tty->name, "cy_throttle")) {
4166 return;
4167 }
4168
4169 card = info->card;
4170
4171 if (I_IXOFF(tty)) {
4172 if (!IS_CYC_Z(*card))
4173 cy_send_xchar(tty, STOP_CHAR(tty));
4174 else
4175 info->throttle = 1;
4176 }
4177
4178 if (tty->termios->c_cflag & CRTSCTS) {
4179 channel = info->line - card->first_line;
4180 if (!IS_CYC_Z(*card)) {
4181 chip = channel >> 2;
4182 channel &= 0x03;
4183 index = card->bus_index;
4184 base_addr = card->base_addr +
4185 (cy_chip_offset[chip] << index);
4186
4187 spin_lock_irqsave(&card->card_lock, flags);
4188 cy_writeb(base_addr + (CyCAR << index),
4189 (u_char) channel);
4190 if (info->rtsdtr_inv) {
4191 cy_writeb(base_addr + (CyMSVR2 << index),
4192 ~CyDTR);
4193 } else {
4194 cy_writeb(base_addr + (CyMSVR1 << index),
4195 ~CyRTS);
4196 }
4197 spin_unlock_irqrestore(&card->card_lock, flags);
4198 } else {
4199 info->throttle = 1;
4200 }
4201 }
4202 } /* cy_throttle */
4203
4204 /*
4205 * This routine notifies the tty driver that it should signal
4206 * that characters can now be sent to the tty without fear of
4207 * overrunning the input buffers of the line disciplines.
4208 */
4209 static void cy_unthrottle(struct tty_struct *tty)
4210 {
4211 struct cyclades_port *info = tty->driver_data;
4212 struct cyclades_card *card;
4213 unsigned long flags;
4214 void __iomem *base_addr;
4215 int chip, channel, index;
4216
4217 #ifdef CY_DEBUG_THROTTLE
4218 char buf[64];
4219
4220 printk(KERN_DEBUG "cyc:unthrottle %s: %ld...ttyC%d\n",
4221 tty_name(tty, buf), tty->ldisc.chars_in_buffer(tty),info->line);
4222 #endif
4223
4224 if (serial_paranoia_check(info, tty->name, "cy_unthrottle")) {
4225 return;
4226 }
4227
4228 if (I_IXOFF(tty)) {
4229 if (info->x_char)
4230 info->x_char = 0;
4231 else
4232 cy_send_xchar(tty, START_CHAR(tty));
4233 }
4234
4235 if (tty->termios->c_cflag & CRTSCTS) {
4236 card = info->card;
4237 channel = info->line - card->first_line;
4238 if (!IS_CYC_Z(*card)) {
4239 chip = channel >> 2;
4240 channel &= 0x03;
4241 index = card->bus_index;
4242 base_addr = card->base_addr +
4243 (cy_chip_offset[chip] << index);
4244
4245 spin_lock_irqsave(&card->card_lock, flags);
4246 cy_writeb(base_addr + (CyCAR << index),
4247 (u_char) channel);
4248 if (info->rtsdtr_inv) {
4249 cy_writeb(base_addr + (CyMSVR2 << index),
4250 CyDTR);
4251 } else {
4252 cy_writeb(base_addr + (CyMSVR1 << index),
4253 CyRTS);
4254 }
4255 spin_unlock_irqrestore(&card->card_lock, flags);
4256 } else {
4257 info->throttle = 0;
4258 }
4259 }
4260 } /* cy_unthrottle */
4261
4262 /* cy_start and cy_stop provide software output flow control as a
4263 function of XON/XOFF, software CTS, and other such stuff.
4264 */
4265 static void cy_stop(struct tty_struct *tty)
4266 {
4267 struct cyclades_card *cinfo;
4268 struct cyclades_port *info = tty->driver_data;
4269 void __iomem *base_addr;
4270 int chip, channel, index;
4271 unsigned long flags;
4272
4273 #ifdef CY_DEBUG_OTHER
4274 printk(KERN_DEBUG "cyc:cy_stop ttyC%d\n", info->line);
4275 #endif
4276
4277 if (serial_paranoia_check(info, tty->name, "cy_stop"))
4278 return;
4279
4280 cinfo = info->card;
4281 channel = info->line - cinfo->first_line;
4282 if (!IS_CYC_Z(*cinfo)) {
4283 index = cinfo->bus_index;
4284 chip = channel >> 2;
4285 channel &= 0x03;
4286 base_addr = cinfo->base_addr + (cy_chip_offset[chip] << index);
4287
4288 spin_lock_irqsave(&cinfo->card_lock, flags);
4289 cy_writeb(base_addr + (CyCAR << index),
4290 (u_char)(channel & 0x0003)); /* index channel */
4291 cy_writeb(base_addr + (CySRER << index),
4292 readb(base_addr + (CySRER << index)) & ~CyTxRdy);
4293 spin_unlock_irqrestore(&cinfo->card_lock, flags);
4294 }
4295 } /* cy_stop */
4296
4297 static void cy_start(struct tty_struct *tty)
4298 {
4299 struct cyclades_card *cinfo;
4300 struct cyclades_port *info = tty->driver_data;
4301 void __iomem *base_addr;
4302 int chip, channel, index;
4303 unsigned long flags;
4304
4305 #ifdef CY_DEBUG_OTHER
4306 printk(KERN_DEBUG "cyc:cy_start ttyC%d\n", info->line);
4307 #endif
4308
4309 if (serial_paranoia_check(info, tty->name, "cy_start"))
4310 return;
4311
4312 cinfo = info->card;
4313 channel = info->line - cinfo->first_line;
4314 index = cinfo->bus_index;
4315 if (!IS_CYC_Z(*cinfo)) {
4316 chip = channel >> 2;
4317 channel &= 0x03;
4318 base_addr = cinfo->base_addr + (cy_chip_offset[chip] << index);
4319
4320 spin_lock_irqsave(&cinfo->card_lock, flags);
4321 cy_writeb(base_addr + (CyCAR << index), (u_char) (channel & 0x0003)); /* index channel */
4322 cy_writeb(base_addr + (CySRER << index),
4323 readb(base_addr + (CySRER << index)) | CyTxRdy);
4324 spin_unlock_irqrestore(&cinfo->card_lock, flags);
4325 }
4326 } /* cy_start */
4327
4328 static void cy_flush_buffer(struct tty_struct *tty)
4329 {
4330 struct cyclades_port *info = tty->driver_data;
4331 struct cyclades_card *card;
4332 int channel, retval;
4333 unsigned long flags;
4334
4335 #ifdef CY_DEBUG_IO
4336 printk(KERN_DEBUG "cyc:cy_flush_buffer ttyC%d\n", info->line);
4337 #endif
4338
4339 if (serial_paranoia_check(info, tty->name, "cy_flush_buffer"))
4340 return;
4341
4342 card = info->card;
4343 channel = info->line - card->first_line;
4344
4345 spin_lock_irqsave(&card->card_lock, flags);
4346 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
4347 spin_unlock_irqrestore(&card->card_lock, flags);
4348
4349 if (IS_CYC_Z(*card)) { /* If it is a Z card, flush the on-board
4350 buffers as well */
4351 spin_lock_irqsave(&card->card_lock, flags);
4352 retval = cyz_issue_cmd(card, channel, C_CM_FLUSH_TX, 0L);
4353 if (retval != 0) {
4354 printk(KERN_ERR "cyc: flush_buffer retval on ttyC%d "
4355 "was %x\n", info->line, retval);
4356 }
4357 spin_unlock_irqrestore(&card->card_lock, flags);
4358 }
4359 tty_wakeup(tty);
4360 } /* cy_flush_buffer */
4361
4362 /*
4363 * cy_hangup() --- called by tty_hangup() when a hangup is signaled.
4364 */
4365 static void cy_hangup(struct tty_struct *tty)
4366 {
4367 struct cyclades_port *info = tty->driver_data;
4368
4369 #ifdef CY_DEBUG_OTHER
4370 printk(KERN_DEBUG "cyc:cy_hangup ttyC%d\n", info->line);
4371 #endif
4372
4373 if (serial_paranoia_check(info, tty->name, "cy_hangup"))
4374 return;
4375
4376 cy_flush_buffer(tty);
4377 shutdown(info);
4378 info->count = 0;
4379 #ifdef CY_DEBUG_COUNT
4380 printk(KERN_DEBUG "cyc:cy_hangup (%d): setting count to 0\n",
4381 current->pid);
4382 #endif
4383 info->tty = NULL;
4384 info->flags &= ~ASYNC_NORMAL_ACTIVE;
4385 wake_up_interruptible(&info->open_wait);
4386 } /* cy_hangup */
4387
4388 /*
4389 * ---------------------------------------------------------------------
4390 * cy_init() and friends
4391 *
4392 * cy_init() is called at boot-time to initialize the serial driver.
4393 * ---------------------------------------------------------------------
4394 */
4395
4396 static int __devinit cy_init_card(struct cyclades_card *cinfo)
4397 {
4398 struct cyclades_port *info;
4399 u32 uninitialized_var(mailbox);
4400 unsigned int nports;
4401 unsigned short chip_number;
4402 int uninitialized_var(index), port;
4403
4404 spin_lock_init(&cinfo->card_lock);
4405
4406 if (IS_CYC_Z(*cinfo)) { /* Cyclades-Z */
4407 mailbox = readl(&((struct RUNTIME_9060 __iomem *)
4408 cinfo->ctl_addr)->mail_box_0);
4409 nports = (mailbox == ZE_V1) ? ZE_V1_NPORTS : 8;
4410 cinfo->intr_enabled = 0;
4411 cinfo->nports = 0; /* Will be correctly set later, after
4412 Z FW is loaded */
4413 } else {
4414 index = cinfo->bus_index;
4415 nports = cinfo->nports = CyPORTS_PER_CHIP * cinfo->num_chips;
4416 }
4417
4418 cinfo->ports = kzalloc(sizeof(*cinfo->ports) * nports, GFP_KERNEL);
4419 if (cinfo->ports == NULL) {
4420 printk(KERN_ERR "Cyclades: cannot allocate ports\n");
4421 cinfo->nports = 0;
4422 return -ENOMEM;
4423 }
4424
4425 for (port = cinfo->first_line; port < cinfo->first_line + nports;
4426 port++) {
4427 info = &cinfo->ports[port - cinfo->first_line];
4428 info->magic = CYCLADES_MAGIC;
4429 info->card = cinfo;
4430 info->line = port;
4431 info->flags = STD_COM_FLAGS;
4432 info->closing_wait = CLOSING_WAIT_DELAY;
4433 info->close_delay = 5 * HZ / 10;
4434
4435 init_waitqueue_head(&info->open_wait);
4436 init_waitqueue_head(&info->close_wait);
4437 init_completion(&info->shutdown_wait);
4438 init_waitqueue_head(&info->delta_msr_wait);
4439
4440 if (IS_CYC_Z(*cinfo)) {
4441 info->type = PORT_STARTECH;
4442 if (mailbox == ZO_V1)
4443 info->xmit_fifo_size = CYZ_FIFO_SIZE;
4444 else
4445 info->xmit_fifo_size = 4 * CYZ_FIFO_SIZE;
4446 #ifdef CONFIG_CYZ_INTR
4447 setup_timer(&cyz_rx_full_timer[port],
4448 cyz_rx_restart, (unsigned long)info);
4449 #endif
4450 } else {
4451 info->type = PORT_CIRRUS;
4452 info->xmit_fifo_size = CyMAX_CHAR_FIFO;
4453 info->cor1 = CyPARITY_NONE | Cy_1_STOP | Cy_8_BITS;
4454 info->cor2 = CyETC;
4455 info->cor3 = 0x08; /* _very_ small rcv threshold */
4456
4457 chip_number = (port - cinfo->first_line) / 4;
4458 if ((info->chip_rev = readb(cinfo->base_addr +
4459 (cy_chip_offset[chip_number] <<
4460 index) + (CyGFRCR << index))) >=
4461 CD1400_REV_J) {
4462 /* It is a CD1400 rev. J or later */
4463 info->tbpr = baud_bpr_60[13]; /* Tx BPR */
4464 info->tco = baud_co_60[13]; /* Tx CO */
4465 info->rbpr = baud_bpr_60[13]; /* Rx BPR */
4466 info->rco = baud_co_60[13]; /* Rx CO */
4467 info->rtsdtr_inv = 1;
4468 } else {
4469 info->tbpr = baud_bpr_25[13]; /* Tx BPR */
4470 info->tco = baud_co_25[13]; /* Tx CO */
4471 info->rbpr = baud_bpr_25[13]; /* Rx BPR */
4472 info->rco = baud_co_25[13]; /* Rx CO */
4473 info->rtsdtr_inv = 0;
4474 }
4475 info->read_status_mask = CyTIMEOUT | CySPECHAR |
4476 CyBREAK | CyPARITY | CyFRAME | CyOVERRUN;
4477 }
4478
4479 }
4480
4481 #ifndef CONFIG_CYZ_INTR
4482 if (IS_CYC_Z(*cinfo) && !timer_pending(&cyz_timerlist)) {
4483 mod_timer(&cyz_timerlist, jiffies + 1);
4484 #ifdef CY_PCI_DEBUG
4485 printk(KERN_DEBUG "Cyclades-Z polling initialized\n");
4486 #endif
4487 }
4488 #endif
4489 return 0;
4490 }
4491
4492 /* initialize chips on Cyclom-Y card -- return number of valid
4493 chips (which is number of ports/4) */
4494 static unsigned short __devinit cyy_init_card(void __iomem *true_base_addr,
4495 int index)
4496 {
4497 unsigned int chip_number;
4498 void __iomem *base_addr;
4499
4500 cy_writeb(true_base_addr + (Cy_HwReset << index), 0);
4501 /* Cy_HwReset is 0x1400 */
4502 cy_writeb(true_base_addr + (Cy_ClrIntr << index), 0);
4503 /* Cy_ClrIntr is 0x1800 */
4504 udelay(500L);
4505
4506 for (chip_number = 0; chip_number < CyMAX_CHIPS_PER_CARD; chip_number++) {
4507 base_addr =
4508 true_base_addr + (cy_chip_offset[chip_number] << index);
4509 mdelay(1);
4510 if (readb(base_addr + (CyCCR << index)) != 0x00) {
4511 /*************
4512 printk(" chip #%d at %#6lx is never idle (CCR != 0)\n",
4513 chip_number, (unsigned long)base_addr);
4514 *************/
4515 return chip_number;
4516 }
4517
4518 cy_writeb(base_addr + (CyGFRCR << index), 0);
4519 udelay(10L);
4520
4521 /* The Cyclom-16Y does not decode address bit 9 and therefore
4522 cannot distinguish between references to chip 0 and a non-
4523 existent chip 4. If the preceding clearing of the supposed
4524 chip 4 GFRCR register appears at chip 0, there is no chip 4
4525 and this must be a Cyclom-16Y, not a Cyclom-32Ye.
4526 */
4527 if (chip_number == 4 && readb(true_base_addr +
4528 (cy_chip_offset[0] << index) +
4529 (CyGFRCR << index)) == 0) {
4530 return chip_number;
4531 }
4532
4533 cy_writeb(base_addr + (CyCCR << index), CyCHIP_RESET);
4534 mdelay(1);
4535
4536 if (readb(base_addr + (CyGFRCR << index)) == 0x00) {
4537 /*
4538 printk(" chip #%d at %#6lx is not responding ",
4539 chip_number, (unsigned long)base_addr);
4540 printk("(GFRCR stayed 0)\n",
4541 */
4542 return chip_number;
4543 }
4544 if ((0xf0 & (readb(base_addr + (CyGFRCR << index)))) !=
4545 0x40) {
4546 /*
4547 printk(" chip #%d at %#6lx is not valid (GFRCR == "
4548 "%#2x)\n",
4549 chip_number, (unsigned long)base_addr,
4550 base_addr[CyGFRCR<<index]);
4551 */
4552 return chip_number;
4553 }
4554 cy_writeb(base_addr + (CyGCR << index), CyCH0_SERIAL);
4555 if (readb(base_addr + (CyGFRCR << index)) >= CD1400_REV_J) {
4556 /* It is a CD1400 rev. J or later */
4557 /* Impossible to reach 5ms with this chip.
4558 Changed to 2ms instead (f = 500 Hz). */
4559 cy_writeb(base_addr + (CyPPR << index), CyCLOCK_60_2MS);
4560 } else {
4561 /* f = 200 Hz */
4562 cy_writeb(base_addr + (CyPPR << index), CyCLOCK_25_5MS);
4563 }
4564
4565 /*
4566 printk(" chip #%d at %#6lx is rev 0x%2x\n",
4567 chip_number, (unsigned long)base_addr,
4568 readb(base_addr+(CyGFRCR<<index)));
4569 */
4570 }
4571 return chip_number;
4572 } /* cyy_init_card */
4573
4574 /*
4575 * ---------------------------------------------------------------------
4576 * cy_detect_isa() - Probe for Cyclom-Y/ISA boards.
4577 * sets global variables and return the number of ISA boards found.
4578 * ---------------------------------------------------------------------
4579 */
4580 static int __init cy_detect_isa(void)
4581 {
4582 #ifdef CONFIG_ISA
4583 unsigned short cy_isa_irq, nboard;
4584 void __iomem *cy_isa_address;
4585 unsigned short i, j, cy_isa_nchan;
4586 #ifdef MODULE
4587 int isparam = 0;
4588 #endif
4589
4590 nboard = 0;
4591
4592 #ifdef MODULE
4593 /* Check for module parameters */
4594 for (i = 0; i < NR_CARDS; i++) {
4595 if (maddr[i] || i) {
4596 isparam = 1;
4597 cy_isa_addresses[i] = maddr[i];
4598 }
4599 if (!maddr[i])
4600 break;
4601 }
4602 #endif
4603
4604 /* scan the address table probing for Cyclom-Y/ISA boards */
4605 for (i = 0; i < NR_ISA_ADDRS; i++) {
4606 unsigned int isa_address = cy_isa_addresses[i];
4607 if (isa_address == 0x0000) {
4608 return nboard;
4609 }
4610
4611 /* probe for CD1400... */
4612 cy_isa_address = ioremap(isa_address, CyISA_Ywin);
4613 if (cy_isa_address == NULL) {
4614 printk(KERN_ERR "Cyclom-Y/ISA: can't remap base "
4615 "address\n");
4616 continue;
4617 }
4618 cy_isa_nchan = CyPORTS_PER_CHIP *
4619 cyy_init_card(cy_isa_address, 0);
4620 if (cy_isa_nchan == 0) {
4621 iounmap(cy_isa_address);
4622 continue;
4623 }
4624 #ifdef MODULE
4625 if (isparam && irq[i])
4626 cy_isa_irq = irq[i];
4627 else
4628 #endif
4629 /* find out the board's irq by probing */
4630 cy_isa_irq = detect_isa_irq(cy_isa_address);
4631 if (cy_isa_irq == 0) {
4632 printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but the "
4633 "IRQ could not be detected.\n",
4634 (unsigned long)cy_isa_address);
4635 iounmap(cy_isa_address);
4636 continue;
4637 }
4638
4639 if ((cy_next_channel + cy_isa_nchan) > NR_PORTS) {
4640 printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but no "
4641 "more channels are available. Change NR_PORTS "
4642 "in cyclades.c and recompile kernel.\n",
4643 (unsigned long)cy_isa_address);
4644 iounmap(cy_isa_address);
4645 return nboard;
4646 }
4647 /* fill the next cy_card structure available */
4648 for (j = 0; j < NR_CARDS; j++) {
4649 if (cy_card[j].base_addr == NULL)
4650 break;
4651 }
4652 if (j == NR_CARDS) { /* no more cy_cards available */
4653 printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but no "
4654 "more cards can be used. Change NR_CARDS in "
4655 "cyclades.c and recompile kernel.\n",
4656 (unsigned long)cy_isa_address);
4657 iounmap(cy_isa_address);
4658 return nboard;
4659 }
4660
4661 /* allocate IRQ */
4662 if (request_irq(cy_isa_irq, cyy_interrupt,
4663 IRQF_DISABLED, "Cyclom-Y", &cy_card[j])) {
4664 printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but "
4665 "could not allocate IRQ#%d.\n",
4666 (unsigned long)cy_isa_address, cy_isa_irq);
4667 iounmap(cy_isa_address);
4668 return nboard;
4669 }
4670
4671 /* set cy_card */
4672 cy_card[j].base_addr = cy_isa_address;
4673 cy_card[j].ctl_addr = NULL;
4674 cy_card[j].irq = (int)cy_isa_irq;
4675 cy_card[j].bus_index = 0;
4676 cy_card[j].first_line = cy_next_channel;
4677 cy_card[j].num_chips = cy_isa_nchan / 4;
4678 if (cy_init_card(&cy_card[j])) {
4679 cy_card[j].base_addr = NULL;
4680 free_irq(cy_isa_irq, &cy_card[j]);
4681 iounmap(cy_isa_address);
4682 continue;
4683 }
4684 nboard++;
4685
4686 printk(KERN_INFO "Cyclom-Y/ISA #%d: 0x%lx-0x%lx, IRQ%d found: "
4687 "%d channels starting from port %d\n",
4688 j + 1, (unsigned long)cy_isa_address,
4689 (unsigned long)(cy_isa_address + (CyISA_Ywin - 1)),
4690 cy_isa_irq, cy_isa_nchan, cy_next_channel);
4691
4692 for (j = cy_next_channel;
4693 j < cy_next_channel + cy_isa_nchan; j++)
4694 tty_register_device(cy_serial_driver, j, NULL);
4695 cy_next_channel += cy_isa_nchan;
4696 }
4697 return nboard;
4698 #else
4699 return 0;
4700 #endif /* CONFIG_ISA */
4701 } /* cy_detect_isa */
4702
4703 #ifdef CONFIG_PCI
4704 static inline int __devinit cyc_isfwstr(const char *str, unsigned int size)
4705 {
4706 unsigned int a;
4707
4708 for (a = 0; a < size && *str; a++, str++)
4709 if (*str & 0x80)
4710 return -EINVAL;
4711
4712 for (; a < size; a++, str++)
4713 if (*str)
4714 return -EINVAL;
4715
4716 return 0;
4717 }
4718
4719 static inline void __devinit cyz_fpga_copy(void __iomem *fpga, u8 *data,
4720 unsigned int size)
4721 {
4722 for (; size > 0; size--) {
4723 cy_writel(fpga, *data++);
4724 udelay(10);
4725 }
4726 }
4727
4728 static void __devinit plx_init(struct pci_dev *pdev, int irq,
4729 struct RUNTIME_9060 __iomem *addr)
4730 {
4731 /* Reset PLX */
4732 cy_writel(&addr->init_ctrl, readl(&addr->init_ctrl) | 0x40000000);
4733 udelay(100L);
4734 cy_writel(&addr->init_ctrl, readl(&addr->init_ctrl) & ~0x40000000);
4735
4736 /* Reload Config. Registers from EEPROM */
4737 cy_writel(&addr->init_ctrl, readl(&addr->init_ctrl) | 0x20000000);
4738 udelay(100L);
4739 cy_writel(&addr->init_ctrl, readl(&addr->init_ctrl) & ~0x20000000);
4740
4741 /* For some yet unknown reason, once the PLX9060 reloads the EEPROM,
4742 * the IRQ is lost and, thus, we have to re-write it to the PCI config.
4743 * registers. This will remain here until we find a permanent fix.
4744 */
4745 pci_write_config_byte(pdev, PCI_INTERRUPT_LINE, irq);
4746 }
4747
4748 static int __devinit __cyz_load_fw(const struct firmware *fw,
4749 const char *name, const u32 mailbox, void __iomem *base,
4750 void __iomem *fpga)
4751 {
4752 void *ptr = fw->data;
4753 struct zfile_header *h = ptr;
4754 struct zfile_config *c, *cs;
4755 struct zfile_block *b, *bs;
4756 unsigned int a, tmp, len = fw->size;
4757 #define BAD_FW KERN_ERR "Bad firmware: "
4758 if (len < sizeof(*h)) {
4759 printk(BAD_FW "too short: %u<%zu\n", len, sizeof(*h));
4760 return -EINVAL;
4761 }
4762
4763 cs = ptr + h->config_offset;
4764 bs = ptr + h->block_offset;
4765
4766 if ((void *)(cs + h->n_config) > ptr + len ||
4767 (void *)(bs + h->n_blocks) > ptr + len) {
4768 printk(BAD_FW "too short");
4769 return -EINVAL;
4770 }
4771
4772 if (cyc_isfwstr(h->name, sizeof(h->name)) ||
4773 cyc_isfwstr(h->date, sizeof(h->date))) {
4774 printk(BAD_FW "bad formatted header string\n");
4775 return -EINVAL;
4776 }
4777
4778 if (strncmp(name, h->name, sizeof(h->name))) {
4779 printk(BAD_FW "bad name '%s' (expected '%s')\n", h->name, name);
4780 return -EINVAL;
4781 }
4782
4783 tmp = 0;
4784 for (c = cs; c < cs + h->n_config; c++) {
4785 for (a = 0; a < c->n_blocks; a++)
4786 if (c->block_list[a] > h->n_blocks) {
4787 printk(BAD_FW "bad block ref number in cfgs\n");
4788 return -EINVAL;
4789 }
4790 if (c->mailbox == mailbox && c->function == 0) /* 0 is normal */
4791 tmp++;
4792 }
4793 if (!tmp) {
4794 printk(BAD_FW "nothing appropriate\n");
4795 return -EINVAL;
4796 }
4797
4798 for (b = bs; b < bs + h->n_blocks; b++)
4799 if (b->file_offset + b->size > len) {
4800 printk(BAD_FW "bad block data offset\n");
4801 return -EINVAL;
4802 }
4803
4804 /* everything is OK, let's seek'n'load it */
4805 for (c = cs; c < cs + h->n_config; c++)
4806 if (c->mailbox == mailbox && c->function == 0)
4807 break;
4808
4809 for (a = 0; a < c->n_blocks; a++) {
4810 b = &bs[c->block_list[a]];
4811 if (b->type == ZBLOCK_FPGA) {
4812 if (fpga != NULL)
4813 cyz_fpga_copy(fpga, ptr + b->file_offset,
4814 b->size);
4815 } else {
4816 if (base != NULL)
4817 memcpy_toio(base + b->ram_offset,
4818 ptr + b->file_offset, b->size);
4819 }
4820 }
4821 #undef BAD_FW
4822 return 0;
4823 }
4824
4825 static int __devinit cyz_load_fw(struct pci_dev *pdev, void __iomem *base_addr,
4826 struct RUNTIME_9060 __iomem *ctl_addr, int irq)
4827 {
4828 const struct firmware *fw;
4829 struct FIRM_ID __iomem *fid = base_addr + ID_ADDRESS;
4830 struct CUSTOM_REG __iomem *cust = base_addr;
4831 struct ZFW_CTRL __iomem *pt_zfwctrl;
4832 void __iomem *tmp;
4833 u32 mailbox, status;
4834 unsigned int i;
4835 int retval;
4836
4837 retval = request_firmware(&fw, "cyzfirm.bin", &pdev->dev);
4838 if (retval) {
4839 dev_err(&pdev->dev, "can't get firmware\n");
4840 goto err;
4841 }
4842
4843 /* Check whether the firmware is already loaded and running. If
4844 positive, skip this board */
4845 if (Z_FPGA_LOADED(ctl_addr) && readl(&fid->signature) == ZFIRM_ID) {
4846 u32 cntval = readl(base_addr + 0x190);
4847
4848 udelay(100);
4849 if (cntval != readl(base_addr + 0x190)) {
4850 /* FW counter is working, FW is running */
4851 dev_dbg(&pdev->dev, "Cyclades-Z FW already loaded. "
4852 "Skipping board.\n");
4853 retval = 0;
4854 goto err_rel;
4855 }
4856 }
4857
4858 /* start boot */
4859 cy_writel(&ctl_addr->intr_ctrl_stat, readl(&ctl_addr->intr_ctrl_stat) &
4860 ~0x00030800UL);
4861
4862 mailbox = readl(&ctl_addr->mail_box_0);
4863
4864 if (mailbox == 0 || Z_FPGA_LOADED(ctl_addr)) {
4865 /* stops CPU and set window to beginning of RAM */
4866 cy_writel(&ctl_addr->loc_addr_base, WIN_CREG);
4867 cy_writel(&cust->cpu_stop, 0);
4868 cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
4869 udelay(100);
4870 }
4871
4872 plx_init(pdev, irq, ctl_addr);
4873
4874 if (mailbox != 0) {
4875 /* load FPGA */
4876 retval = __cyz_load_fw(fw, "Cyclom-Z", mailbox, NULL,
4877 base_addr);
4878 if (retval)
4879 goto err_rel;
4880 if (!Z_FPGA_LOADED(ctl_addr)) {
4881 dev_err(&pdev->dev, "fw upload successful, but fw is "
4882 "not loaded\n");
4883 goto err_rel;
4884 }
4885 }
4886
4887 /* stops CPU and set window to beginning of RAM */
4888 cy_writel(&ctl_addr->loc_addr_base, WIN_CREG);
4889 cy_writel(&cust->cpu_stop, 0);
4890 cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
4891 udelay(100);
4892
4893 /* clear memory */
4894 for (tmp = base_addr; tmp < base_addr + RAM_SIZE; tmp++)
4895 cy_writeb(tmp, 255);
4896 if (mailbox != 0) {
4897 /* set window to last 512K of RAM */
4898 cy_writel(&ctl_addr->loc_addr_base, WIN_RAM + RAM_SIZE);
4899 //sleep(1);
4900 for (tmp = base_addr; tmp < base_addr + RAM_SIZE; tmp++)
4901 cy_writeb(tmp, 255);
4902 /* set window to beginning of RAM */
4903 cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
4904 //sleep(1);
4905 }
4906
4907 retval = __cyz_load_fw(fw, "Cyclom-Z", mailbox, base_addr, NULL);
4908 release_firmware(fw);
4909 if (retval)
4910 goto err;
4911
4912 /* finish boot and start boards */
4913 cy_writel(&ctl_addr->loc_addr_base, WIN_CREG);
4914 cy_writel(&cust->cpu_start, 0);
4915 cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
4916 i = 0;
4917 while ((status = readl(&fid->signature)) != ZFIRM_ID && i++ < 40)
4918 msleep(100);
4919 if (status != ZFIRM_ID) {
4920 if (status == ZFIRM_HLT) {
4921 dev_err(&pdev->dev, "you need an external power supply "
4922 "for this number of ports. Firmware halted and "
4923 "board reset.\n");
4924 retval = -EIO;
4925 goto err;
4926 }
4927 dev_warn(&pdev->dev, "fid->signature = 0x%x... Waiting "
4928 "some more time\n", status);
4929 while ((status = readl(&fid->signature)) != ZFIRM_ID &&
4930 i++ < 200)
4931 msleep(100);
4932 if (status != ZFIRM_ID) {
4933 dev_err(&pdev->dev, "Board not started in 20 seconds! "
4934 "Giving up. (fid->signature = 0x%x)\n",
4935 status);
4936 dev_info(&pdev->dev, "*** Warning ***: if you are "
4937 "upgrading the FW, please power cycle the "
4938 "system before loading the new FW to the "
4939 "Cyclades-Z.\n");
4940
4941 if (Z_FPGA_LOADED(ctl_addr))
4942 plx_init(pdev, irq, ctl_addr);
4943
4944 retval = -EIO;
4945 goto err;
4946 }
4947 dev_dbg(&pdev->dev, "Firmware started after %d seconds.\n",
4948 i / 10);
4949 }
4950 pt_zfwctrl = base_addr + readl(&fid->zfwctrl_addr);
4951
4952 dev_dbg(&pdev->dev, "fid=> %p, zfwctrl_addr=> %x, npt_zfwctrl=> %p\n",
4953 base_addr + ID_ADDRESS, readl(&fid->zfwctrl_addr),
4954 base_addr + readl(&fid->zfwctrl_addr));
4955
4956 dev_info(&pdev->dev, "Cyclades-Z FW loaded: version = %x, ports = %u\n",
4957 readl(&pt_zfwctrl->board_ctrl.fw_version),
4958 readl(&pt_zfwctrl->board_ctrl.n_channel));
4959
4960 if (readl(&pt_zfwctrl->board_ctrl.n_channel) == 0) {
4961 dev_warn(&pdev->dev, "no Cyclades-Z ports were found. Please "
4962 "check the connection between the Z host card and the "
4963 "serial expanders.\n");
4964
4965 if (Z_FPGA_LOADED(ctl_addr))
4966 plx_init(pdev, irq, ctl_addr);
4967
4968 dev_info(&pdev->dev, "Null number of ports detected. Board "
4969 "reset.\n");
4970 retval = 0;
4971 goto err;
4972 }
4973
4974 cy_writel(&pt_zfwctrl->board_ctrl.op_system, C_OS_LINUX);
4975 cy_writel(&pt_zfwctrl->board_ctrl.dr_version, DRIVER_VERSION);
4976
4977 /*
4978 Early firmware failed to start looking for commands.
4979 This enables firmware interrupts for those commands.
4980 */
4981 cy_writel(&ctl_addr->intr_ctrl_stat, readl(&ctl_addr->intr_ctrl_stat) |
4982 (1 << 17));
4983 cy_writel(&ctl_addr->intr_ctrl_stat, readl(&ctl_addr->intr_ctrl_stat) |
4984 0x00030800UL);
4985
4986 plx_init(pdev, irq, ctl_addr);
4987
4988 return 0;
4989 err_rel:
4990 release_firmware(fw);
4991 err:
4992 return retval;
4993 }
4994
4995 static int __devinit cy_pci_probe(struct pci_dev *pdev,
4996 const struct pci_device_id *ent)
4997 {
4998 void __iomem *addr0 = NULL, *addr2 = NULL;
4999 char *card_name = NULL;
5000 u32 mailbox;
5001 unsigned int device_id, nchan = 0, card_no, i;
5002 unsigned char plx_ver;
5003 int retval, irq;
5004
5005 retval = pci_enable_device(pdev);
5006 if (retval) {
5007 dev_err(&pdev->dev, "cannot enable device\n");
5008 goto err;
5009 }
5010
5011 /* read PCI configuration area */
5012 irq = pdev->irq;
5013 device_id = pdev->device & ~PCI_DEVICE_ID_MASK;
5014
5015 #if defined(__alpha__)
5016 if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo) { /* below 1M? */
5017 dev_err(&pdev->dev, "Cyclom-Y/PCI not supported for low "
5018 "addresses on Alpha systems.\n");
5019 retval = -EIO;
5020 goto err_dis;
5021 }
5022 #endif
5023 if (device_id == PCI_DEVICE_ID_CYCLOM_Z_Lo) {
5024 dev_err(&pdev->dev, "Cyclades-Z/PCI not supported for low "
5025 "addresses\n");
5026 retval = -EIO;
5027 goto err_dis;
5028 }
5029
5030 if (pci_resource_flags(pdev, 2) & IORESOURCE_IO) {
5031 dev_warn(&pdev->dev, "PCI I/O bit incorrectly set. Ignoring "
5032 "it...\n");
5033 pdev->resource[2].flags &= ~IORESOURCE_IO;
5034 }
5035
5036 retval = pci_request_regions(pdev, "cyclades");
5037 if (retval) {
5038 dev_err(&pdev->dev, "failed to reserve resources\n");
5039 goto err_dis;
5040 }
5041
5042 retval = -EIO;
5043 if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo ||
5044 device_id == PCI_DEVICE_ID_CYCLOM_Y_Hi) {
5045 card_name = "Cyclom-Y";
5046
5047 addr0 = pci_iomap(pdev, 0, CyPCI_Yctl);
5048 if (addr0 == NULL) {
5049 dev_err(&pdev->dev, "can't remap ctl region\n");
5050 goto err_reg;
5051 }
5052 addr2 = pci_iomap(pdev, 2, CyPCI_Ywin);
5053 if (addr2 == NULL) {
5054 dev_err(&pdev->dev, "can't remap base region\n");
5055 goto err_unmap;
5056 }
5057
5058 nchan = CyPORTS_PER_CHIP * cyy_init_card(addr2, 1);
5059 if (nchan == 0) {
5060 dev_err(&pdev->dev, "Cyclom-Y PCI host card with no "
5061 "Serial-Modules\n");
5062 return -EIO;
5063 }
5064 } else if (device_id == PCI_DEVICE_ID_CYCLOM_Z_Hi) {
5065 struct RUNTIME_9060 __iomem *ctl_addr;
5066
5067 ctl_addr = addr0 = pci_iomap(pdev, 0, CyPCI_Zctl);
5068 if (addr0 == NULL) {
5069 dev_err(&pdev->dev, "can't remap ctl region\n");
5070 goto err_reg;
5071 }
5072
5073 /* Disable interrupts on the PLX before resetting it */
5074 cy_writew(addr0 + 0x68, readw(addr0 + 0x68) & ~0x0900);
5075
5076 plx_init(pdev, irq, addr0);
5077
5078 mailbox = (u32)readl(&ctl_addr->mail_box_0);
5079
5080 addr2 = pci_iomap(pdev, 2, mailbox == ZE_V1 ?
5081 CyPCI_Ze_win : CyPCI_Zwin);
5082 if (addr2 == NULL) {
5083 dev_err(&pdev->dev, "can't remap base region\n");
5084 goto err_unmap;
5085 }
5086
5087 if (mailbox == ZE_V1) {
5088 card_name = "Cyclades-Ze";
5089
5090 readl(&ctl_addr->mail_box_0);
5091 nchan = ZE_V1_NPORTS;
5092 } else {
5093 card_name = "Cyclades-8Zo";
5094
5095 #ifdef CY_PCI_DEBUG
5096 if (mailbox == ZO_V1) {
5097 cy_writel(&ctl_addr->loc_addr_base, WIN_CREG);
5098 dev_info(&pdev->dev, "Cyclades-8Zo/PCI: FPGA "
5099 "id %lx, ver %lx\n", (ulong)(0xff &
5100 readl(&((struct CUSTOM_REG *)addr2)->
5101 fpga_id)), (ulong)(0xff &
5102 readl(&((struct CUSTOM_REG *)addr2)->
5103 fpga_version)));
5104 cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
5105 } else {
5106 dev_info(&pdev->dev, "Cyclades-Z/PCI: New "
5107 "Cyclades-Z board. FPGA not loaded\n");
5108 }
5109 #endif
5110 /* The following clears the firmware id word. This
5111 ensures that the driver will not attempt to talk to
5112 the board until it has been properly initialized.
5113 */
5114 if ((mailbox == ZO_V1) || (mailbox == ZO_V2))
5115 cy_writel(addr2 + ID_ADDRESS, 0L);
5116
5117 retval = cyz_load_fw(pdev, addr2, addr0, irq);
5118 if (retval)
5119 goto err_unmap;
5120 /* This must be a Cyclades-8Zo/PCI. The extendable
5121 version will have a different device_id and will
5122 be allocated its maximum number of ports. */
5123 nchan = 8;
5124 }
5125 }
5126
5127 if ((cy_next_channel + nchan) > NR_PORTS) {
5128 dev_err(&pdev->dev, "Cyclades-8Zo/PCI found, but no "
5129 "channels are available. Change NR_PORTS in "
5130 "cyclades.c and recompile kernel.\n");
5131 goto err_unmap;
5132 }
5133 /* fill the next cy_card structure available */
5134 for (card_no = 0; card_no < NR_CARDS; card_no++) {
5135 if (cy_card[card_no].base_addr == NULL)
5136 break;
5137 }
5138 if (card_no == NR_CARDS) { /* no more cy_cards available */
5139 dev_err(&pdev->dev, "Cyclades-8Zo/PCI found, but no "
5140 "more cards can be used. Change NR_CARDS in "
5141 "cyclades.c and recompile kernel.\n");
5142 goto err_unmap;
5143 }
5144
5145 if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo ||
5146 device_id == PCI_DEVICE_ID_CYCLOM_Y_Hi) {
5147 /* allocate IRQ */
5148 retval = request_irq(irq, cyy_interrupt,
5149 IRQF_SHARED, "Cyclom-Y", &cy_card[card_no]);
5150 if (retval) {
5151 dev_err(&pdev->dev, "could not allocate IRQ\n");
5152 goto err_unmap;
5153 }
5154 cy_card[card_no].num_chips = nchan / 4;
5155 } else {
5156 #ifdef CONFIG_CYZ_INTR
5157 /* allocate IRQ only if board has an IRQ */
5158 if (irq != 0 && irq != 255) {
5159 retval = request_irq(irq, cyz_interrupt,
5160 IRQF_SHARED, "Cyclades-Z",
5161 &cy_card[card_no]);
5162 if (retval) {
5163 dev_err(&pdev->dev, "could not allocate IRQ\n");
5164 goto err_unmap;
5165 }
5166 }
5167 #endif /* CONFIG_CYZ_INTR */
5168 cy_card[card_no].num_chips = -1;
5169 }
5170
5171 /* set cy_card */
5172 cy_card[card_no].base_addr = addr2;
5173 cy_card[card_no].ctl_addr = addr0;
5174 cy_card[card_no].irq = irq;
5175 cy_card[card_no].bus_index = 1;
5176 cy_card[card_no].first_line = cy_next_channel;
5177 retval = cy_init_card(&cy_card[card_no]);
5178 if (retval)
5179 goto err_null;
5180
5181 pci_set_drvdata(pdev, &cy_card[card_no]);
5182
5183 if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo ||
5184 device_id == PCI_DEVICE_ID_CYCLOM_Y_Hi) {
5185 /* enable interrupts in the PCI interface */
5186 plx_ver = readb(addr2 + CyPLX_VER) & 0x0f;
5187 switch (plx_ver) {
5188 case PLX_9050:
5189
5190 cy_writeb(addr0 + 0x4c, 0x43);
5191 break;
5192
5193 case PLX_9060:
5194 case PLX_9080:
5195 default: /* Old boards, use PLX_9060 */
5196 plx_init(pdev, irq, addr0);
5197 cy_writew(addr0 + 0x68, readw(addr0 + 0x68) | 0x0900);
5198 break;
5199 }
5200 }
5201
5202 dev_info(&pdev->dev, "%s/PCI #%d found: %d channels starting from "
5203 "port %d.\n", card_name, card_no + 1, nchan, cy_next_channel);
5204 for (i = cy_next_channel; i < cy_next_channel + nchan; i++)
5205 tty_register_device(cy_serial_driver, i, &pdev->dev);
5206 cy_next_channel += nchan;
5207
5208 return 0;
5209 err_null:
5210 cy_card[card_no].base_addr = NULL;
5211 free_irq(irq, &cy_card[card_no]);
5212 err_unmap:
5213 pci_iounmap(pdev, addr0);
5214 if (addr2)
5215 pci_iounmap(pdev, addr2);
5216 err_reg:
5217 pci_release_regions(pdev);
5218 err_dis:
5219 pci_disable_device(pdev);
5220 err:
5221 return retval;
5222 }
5223
5224 static void __devexit cy_pci_remove(struct pci_dev *pdev)
5225 {
5226 struct cyclades_card *cinfo = pci_get_drvdata(pdev);
5227 unsigned int i;
5228
5229 /* non-Z with old PLX */
5230 if (!IS_CYC_Z(*cinfo) && (readb(cinfo->base_addr + CyPLX_VER) & 0x0f) ==
5231 PLX_9050)
5232 cy_writeb(cinfo->ctl_addr + 0x4c, 0);
5233 else
5234 #ifndef CONFIG_CYZ_INTR
5235 if (!IS_CYC_Z(*cinfo))
5236 #endif
5237 cy_writew(cinfo->ctl_addr + 0x68,
5238 readw(cinfo->ctl_addr + 0x68) & ~0x0900);
5239
5240 pci_iounmap(pdev, cinfo->base_addr);
5241 if (cinfo->ctl_addr)
5242 pci_iounmap(pdev, cinfo->ctl_addr);
5243 if (cinfo->irq
5244 #ifndef CONFIG_CYZ_INTR
5245 && !IS_CYC_Z(*cinfo)
5246 #endif /* CONFIG_CYZ_INTR */
5247 )
5248 free_irq(cinfo->irq, cinfo);
5249 pci_release_regions(pdev);
5250
5251 cinfo->base_addr = NULL;
5252 for (i = cinfo->first_line; i < cinfo->first_line +
5253 cinfo->nports; i++)
5254 tty_unregister_device(cy_serial_driver, i);
5255 cinfo->nports = 0;
5256 kfree(cinfo->ports);
5257 }
5258
5259 static struct pci_driver cy_pci_driver = {
5260 .name = "cyclades",
5261 .id_table = cy_pci_dev_id,
5262 .probe = cy_pci_probe,
5263 .remove = __devexit_p(cy_pci_remove)
5264 };
5265 #endif
5266
5267 static int
5268 cyclades_get_proc_info(char *buf, char **start, off_t offset, int length,
5269 int *eof, void *data)
5270 {
5271 struct cyclades_port *info;
5272 unsigned int i, j;
5273 int len = 0;
5274 off_t begin = 0;
5275 off_t pos = 0;
5276 int size;
5277 __u32 cur_jifs = jiffies;
5278
5279 size = sprintf(buf, "Dev TimeOpen BytesOut IdleOut BytesIn "
5280 "IdleIn Overruns Ldisc\n");
5281
5282 pos += size;
5283 len += size;
5284
5285 /* Output one line for each known port */
5286 for (i = 0; i < NR_CARDS; i++)
5287 for (j = 0; j < cy_card[i].nports; j++) {
5288 info = &cy_card[i].ports[j];
5289
5290 if (info->count)
5291 size = sprintf(buf + len, "%3d %8lu %10lu %8lu "
5292 "%10lu %8lu %9lu %6ld\n", info->line,
5293 (cur_jifs - info->idle_stats.in_use) /
5294 HZ, info->idle_stats.xmit_bytes,
5295 (cur_jifs - info->idle_stats.xmit_idle)/
5296 HZ, info->idle_stats.recv_bytes,
5297 (cur_jifs - info->idle_stats.recv_idle)/
5298 HZ, info->idle_stats.overruns,
5299 (long)info->tty->ldisc.num);
5300 else
5301 size = sprintf(buf + len, "%3d %8lu %10lu %8lu "
5302 "%10lu %8lu %9lu %6ld\n",
5303 info->line, 0L, 0L, 0L, 0L, 0L, 0L, 0L);
5304 len += size;
5305 pos = begin + len;
5306
5307 if (pos < offset) {
5308 len = 0;
5309 begin = pos;
5310 }
5311 if (pos > offset + length)
5312 goto done;
5313 }
5314 *eof = 1;
5315 done:
5316 *start = buf + (offset - begin); /* Start of wanted data */
5317 len -= (offset - begin); /* Start slop */
5318 if (len > length)
5319 len = length; /* Ending slop */
5320 if (len < 0)
5321 len = 0;
5322 return len;
5323 }
5324
5325 /* The serial driver boot-time initialization code!
5326 Hardware I/O ports are mapped to character special devices on a
5327 first found, first allocated manner. That is, this code searches
5328 for Cyclom cards in the system. As each is found, it is probed
5329 to discover how many chips (and thus how many ports) are present.
5330 These ports are mapped to the tty ports 32 and upward in monotonic
5331 fashion. If an 8-port card is replaced with a 16-port card, the
5332 port mapping on a following card will shift.
5333
5334 This approach is different from what is used in the other serial
5335 device driver because the Cyclom is more properly a multiplexer,
5336 not just an aggregation of serial ports on one card.
5337
5338 If there are more cards with more ports than have been
5339 statically allocated above, a warning is printed and the
5340 extra ports are ignored.
5341 */
5342
5343 static const struct tty_operations cy_ops = {
5344 .open = cy_open,
5345 .close = cy_close,
5346 .write = cy_write,
5347 .put_char = cy_put_char,
5348 .flush_chars = cy_flush_chars,
5349 .write_room = cy_write_room,
5350 .chars_in_buffer = cy_chars_in_buffer,
5351 .flush_buffer = cy_flush_buffer,
5352 .ioctl = cy_ioctl,
5353 .throttle = cy_throttle,
5354 .unthrottle = cy_unthrottle,
5355 .set_termios = cy_set_termios,
5356 .stop = cy_stop,
5357 .start = cy_start,
5358 .hangup = cy_hangup,
5359 .break_ctl = cy_break,
5360 .wait_until_sent = cy_wait_until_sent,
5361 .read_proc = cyclades_get_proc_info,
5362 .tiocmget = cy_tiocmget,
5363 .tiocmset = cy_tiocmset,
5364 };
5365
5366 static int __init cy_init(void)
5367 {
5368 unsigned int nboards;
5369 int retval = -ENOMEM;
5370
5371 cy_serial_driver = alloc_tty_driver(NR_PORTS);
5372 if (!cy_serial_driver)
5373 goto err;
5374
5375 printk(KERN_INFO "Cyclades driver " CY_VERSION " (built %s %s)\n",
5376 __DATE__, __TIME__);
5377
5378 /* Initialize the tty_driver structure */
5379
5380 cy_serial_driver->owner = THIS_MODULE;
5381 cy_serial_driver->driver_name = "cyclades";
5382 cy_serial_driver->name = "ttyC";
5383 cy_serial_driver->major = CYCLADES_MAJOR;
5384 cy_serial_driver->minor_start = 0;
5385 cy_serial_driver->type = TTY_DRIVER_TYPE_SERIAL;
5386 cy_serial_driver->subtype = SERIAL_TYPE_NORMAL;
5387 cy_serial_driver->init_termios = tty_std_termios;
5388 cy_serial_driver->init_termios.c_cflag =
5389 B9600 | CS8 | CREAD | HUPCL | CLOCAL;
5390 cy_serial_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
5391 tty_set_operations(cy_serial_driver, &cy_ops);
5392
5393 retval = tty_register_driver(cy_serial_driver);
5394 if (retval) {
5395 printk(KERN_ERR "Couldn't register Cyclades serial driver\n");
5396 goto err_frtty;
5397 }
5398
5399 /* the code below is responsible to find the boards. Each different
5400 type of board has its own detection routine. If a board is found,
5401 the next cy_card structure available is set by the detection
5402 routine. These functions are responsible for checking the
5403 availability of cy_card and cy_port data structures and updating
5404 the cy_next_channel. */
5405
5406 /* look for isa boards */
5407 nboards = cy_detect_isa();
5408
5409 #ifdef CONFIG_PCI
5410 /* look for pci boards */
5411 retval = pci_register_driver(&cy_pci_driver);
5412 if (retval && !nboards)
5413 goto err_unr;
5414 #endif
5415
5416 return 0;
5417 err_unr:
5418 tty_unregister_driver(cy_serial_driver);
5419 err_frtty:
5420 put_tty_driver(cy_serial_driver);
5421 err:
5422 return retval;
5423 } /* cy_init */
5424
5425 static void __exit cy_cleanup_module(void)
5426 {
5427 struct cyclades_card *card;
5428 int i, e1;
5429
5430 #ifndef CONFIG_CYZ_INTR
5431 del_timer_sync(&cyz_timerlist);
5432 #endif /* CONFIG_CYZ_INTR */
5433
5434 if ((e1 = tty_unregister_driver(cy_serial_driver)))
5435 printk(KERN_ERR "failed to unregister Cyclades serial "
5436 "driver(%d)\n", e1);
5437
5438 #ifdef CONFIG_PCI
5439 pci_unregister_driver(&cy_pci_driver);
5440 #endif
5441
5442 for (i = 0; i < NR_CARDS; i++) {
5443 card = &cy_card[i];
5444 if (card->base_addr) {
5445 /* clear interrupt */
5446 cy_writeb(card->base_addr + Cy_ClrIntr, 0);
5447 iounmap(card->base_addr);
5448 if (card->ctl_addr)
5449 iounmap(card->ctl_addr);
5450 if (card->irq
5451 #ifndef CONFIG_CYZ_INTR
5452 && !IS_CYC_Z(*card)
5453 #endif /* CONFIG_CYZ_INTR */
5454 )
5455 free_irq(card->irq, card);
5456 for (e1 = card->first_line;
5457 e1 < card->first_line +
5458 card->nports; e1++)
5459 tty_unregister_device(cy_serial_driver, e1);
5460 kfree(card->ports);
5461 }
5462 }
5463
5464 put_tty_driver(cy_serial_driver);
5465 } /* cy_cleanup_module */
5466
5467 module_init(cy_init);
5468 module_exit(cy_cleanup_module);
5469
5470 MODULE_LICENSE("GPL");
5471 MODULE_VERSION(CY_VERSION);
Linux kernel - Deliverables
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