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