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Merge branch 'for-2.6.27' of git://git.infradead.org/users/dwmw2/firmware-2.6
[GitHub/mt8127/android_kernel_alcatel_ttab.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 * Prevent users from opening non-existing Z ports.
25 *
26 * Revision 2.3.2.8 2000/07/06 18:14:16 ivan
27 * Fixed the PCI detection function to work properly on Alpha systems.
28 * Implemented support for TIOCSERGETLSR ioctl.
29 * Implemented full support for non-standard baud rates.
30 *
31 * Revision 2.3.2.7 2000/06/01 18:26:34 ivan
32 * Request PLX I/O region, although driver doesn't use it, to avoid
33 * problems with other drivers accessing it.
34 * Removed count for on-board buffer characters in cy_chars_in_buffer
35 * (Cyclades-Z only).
36 *
37 * Revision 2.3.2.6 2000/05/05 13:56:05 ivan
38 * Driver now reports physical instead of virtual memory addresses.
39 * Masks were added to some Cyclades-Z read accesses.
40 * Implemented workaround for PLX9050 bug that would cause a system lockup
41 * in certain systems, depending on the MMIO addresses allocated to the
42 * board.
43 * Changed the Tx interrupt programming in the CD1400 chips to boost up
44 * performance (Cyclom-Y only).
45 * Code is now compliant with the new module interface (module_[init|exit]).
46 * Make use of the PCI helper functions to access PCI resources.
47 * Did some code "housekeeping".
48 *
49 * Revision 2.3.2.5 2000/01/19 14:35:33 ivan
50 * Fixed bug in cy_set_termios on CRTSCTS flag turnoff.
51 *
52 * Revision 2.3.2.4 2000/01/17 09:19:40 ivan
53 * Fixed SMP locking in Cyclom-Y interrupt handler.
54 *
55 * Revision 2.3.2.3 1999/12/28 12:11:39 ivan
56 * Added a new cyclades_card field called nports to allow the driver to
57 * know the exact number of ports found by the Z firmware after its load;
58 * RX buffer contention prevention logic on interrupt op mode revisited
59 * (Cyclades-Z only);
60 * Revisited printk's for Z debug;
61 * Driver now makes sure that the constant SERIAL_XMIT_SIZE is defined;
62 *
63 * Revision 2.3.2.2 1999/10/01 11:27:43 ivan
64 * Fixed bug in cyz_poll that would make all ports but port 0
65 * unable to transmit/receive data (Cyclades-Z only);
66 * Implemented logic to prevent the RX buffer from being stuck with data
67 * due to a driver / firmware race condition in interrupt op mode
68 * (Cyclades-Z only);
69 * Fixed bug in block_til_ready logic that would lead to a system crash;
70 * Revisited cy_close spinlock usage;
71 *
72 * Revision 2.3.2.1 1999/09/28 11:01:22 ivan
73 * Revisited CONFIG_PCI conditional compilation for PCI board support;
74 * Implemented TIOCGICOUNT and TIOCMIWAIT ioctl support;
75 * _Major_ cleanup on the Cyclades-Z interrupt support code / logic;
76 * Removed CTS handling from the driver -- this is now completely handled
77 * by the firmware (Cyclades-Z only);
78 * Flush RX on-board buffers on a port open (Cyclades-Z only);
79 * Fixed handling of ASYNC_SPD_* TTY flags;
80 * Module unload now unmaps all memory area allocated by ioremap;
81 *
82 * Revision 2.3.1.1 1999/07/15 16:45:53 ivan
83 * Removed CY_PROC conditional compilation;
84 * Implemented SMP-awareness for the driver;
85 * Implemented a new ISA IRQ autoprobe that uses the irq_probe_[on|off]
86 * functions;
87 * The driver now accepts memory addresses (maddr=0xMMMMM) and IRQs
88 * (irq=NN) as parameters (only for ISA boards);
89 * Fixed bug in set_line_char that would prevent the Cyclades-Z
90 * ports from being configured at speeds above 115.2Kbps;
91 * Fixed bug in cy_set_termios that would prevent XON/XOFF flow control
92 * switching from working properly;
93 * The driver now only prints IRQ info for the Cyclades-Z if it's
94 * configured to work in interrupt mode;
95 *
96 * Revision 2.2.2.3 1999/06/28 11:13:29 ivan
97 * Added support for interrupt mode operation for the Z cards;
98 * Removed the driver inactivity control for the Z;
99 * Added a missing MOD_DEC_USE_COUNT in the cy_open function for when
100 * the Z firmware is not loaded yet;
101 * Replaced the "manual" Z Tx flush buffer by a call to a FW command of
102 * same functionality;
103 * Implemented workaround for IRQ setting loss on the PCI configuration
104 * registers after a PCI bridge EEPROM reload (affects PLX9060 only);
105 *
106 * Revision 2.2.2.2 1999/05/14 17:18:15 ivan
107 * /proc entry location changed to /proc/tty/driver/cyclades;
108 * Added support to shared IRQ's (only for PCI boards);
109 * Added support for Cobalt Qube2 systems;
110 * IRQ [de]allocation scheme revisited;
111 * BREAK implementation changed in order to make use of the 'break_ctl'
112 * TTY facility;
113 * Fixed typo in TTY structure field 'driver_name';
114 * Included a PCI bridge reset and EEPROM reload in the board
115 * initialization code (for both Y and Z series).
116 *
117 * Revision 2.2.2.1 1999/04/08 16:17:43 ivan
118 * Fixed a bug in cy_wait_until_sent that was preventing the port to be
119 * closed properly after a SIGINT;
120 * Module usage counter scheme revisited;
121 * Added support to the upcoming Y PCI boards (i.e., support to additional
122 * PCI Device ID's).
123 *
124 * Revision 2.2.1.10 1999/01/20 16:14:29 ivan
125 * Removed all unnecessary page-alignement operations in ioremap calls
126 * (ioremap is currently safe for these operations).
127 *
128 * Revision 2.2.1.9 1998/12/30 18:18:30 ivan
129 * Changed access to PLX PCI bridge registers from I/O to MMIO, in
130 * order to make PLX9050-based boards work with certain motherboards.
131 *
132 * Revision 2.2.1.8 1998/11/13 12:46:20 ivan
133 * cy_close function now resets (correctly) the tty->closing flag;
134 * JIFFIES_DIFF macro fixed.
135 *
136 * Revision 2.2.1.7 1998/09/03 12:07:28 ivan
137 * Fixed bug in cy_close function, which was not informing HW of
138 * which port should have the reception disabled before doing so;
139 * fixed Cyclom-8YoP hardware detection bug.
140 *
141 * Revision 2.2.1.6 1998/08/20 17:15:39 ivan
142 * Fixed bug in cy_close function, which causes malfunction
143 * of one of the first 4 ports when a higher port is closed
144 * (Cyclom-Y only).
145 *
146 * Revision 2.2.1.5 1998/08/10 18:10:28 ivan
147 * Fixed Cyclom-4Yo hardware detection bug.
148 *
149 * Revision 2.2.1.4 1998/08/04 11:02:50 ivan
150 * /proc/cyclades implementation with great collaboration of
151 * Marc Lewis <marc@blarg.net>;
152 * cyy_interrupt was changed to avoid occurrence of kernel oopses
153 * during PPP operation.
154 *
155 * Revision 2.2.1.3 1998/06/01 12:09:10 ivan
156 * General code review in order to comply with 2.1 kernel standards;
157 * data loss prevention for slow devices revisited (cy_wait_until_sent
158 * was created);
159 * removed conditional compilation for new/old PCI structure support
160 * (now the driver only supports the new PCI structure).
161 *
162 * Revision 2.2.1.1 1998/03/19 16:43:12 ivan
163 * added conditional compilation for new/old PCI structure support;
164 * removed kernel series (2.0.x / 2.1.x) conditional compilation.
165 *
166 * Revision 2.1.1.3 1998/03/16 18:01:12 ivan
167 * cleaned up the data loss fix;
168 * fixed XON/XOFF handling once more (Cyclades-Z);
169 * general review of the driver routines;
170 * introduction of a mechanism to prevent data loss with slow
171 * printers, by forcing a delay before closing the port.
172 *
173 * Revision 2.1.1.2 1998/02/17 16:50:00 ivan
174 * fixed detection/handling of new CD1400 in Ye boards;
175 * fixed XON/XOFF handling (Cyclades-Z);
176 * fixed data loss caused by a premature port close;
177 * introduction of a flag that holds the CD1400 version ID per port
178 * (used by the CYGETCD1400VER new ioctl).
179 *
180 * Revision 2.1.1.1 1997/12/03 17:31:19 ivan
181 * Code review for the module cleanup routine;
182 * fixed RTS and DTR status report for new CD1400's in get_modem_info;
183 * includes anonymous changes regarding signal_pending.
184 *
185 * Revision 2.1 1997/11/01 17:42:41 ivan
186 * Changes in the driver to support Alpha systems (except 8Zo V_1);
187 * BREAK fix for the Cyclades-Z boards;
188 * driver inactivity control by FW implemented;
189 * introduction of flag that allows driver to take advantage of
190 * a special CD1400 feature related to HW flow control;
191 * added support for the CD1400 rev. J (Cyclom-Y boards);
192 * introduction of ioctls to:
193 * - control the rtsdtr_inv flag (Cyclom-Y);
194 * - control the rflow flag (Cyclom-Y);
195 * - adjust the polling interval (Cyclades-Z);
196 *
197 * Revision 1.36.4.33 1997/06/27 19:00:00 ivan
198 * Fixes related to kernel version conditional
199 * compilation.
200 *
201 * Revision 1.36.4.32 1997/06/14 19:30:00 ivan
202 * Compatibility issues between kernels 2.0.x and
203 * 2.1.x (mainly related to clear_bit function).
204 *
205 * Revision 1.36.4.31 1997/06/03 15:30:00 ivan
206 * Changes to define the memory window according to the
207 * board type.
208 *
209 * Revision 1.36.4.30 1997/05/16 15:30:00 daniel
210 * Changes to support new cycladesZ boards.
211 *
212 * Revision 1.36.4.29 1997/05/12 11:30:00 daniel
213 * Merge of Bentson's and Daniel's version 1.36.4.28.
214 * Corrects bug in cy_detect_pci: check if there are more
215 * ports than the number of static structs allocated.
216 * Warning message during initialization if this driver is
217 * used with the new generation of cycladesZ boards. Those
218 * will be supported only in next release of the driver.
219 * Corrects bug in cy_detect_pci and cy_detect_isa that
220 * returned wrong number of VALID boards, when a cyclomY
221 * was found with no serial modules connected.
222 * Changes to use current (2.1.x) kernel subroutine names
223 * and created macros for compilation with 2.0.x kernel,
224 * instead of the other way around.
225 *
226 * Revision 1.36.4.28 1997/05/?? ??:00:00 bentson
227 * Change queue_task_irq_off to queue_task_irq.
228 * The inline function queue_task_irq_off (tqueue.h)
229 * was removed from latest releases of 2.1.x kernel.
230 * Use of macro __init to mark the initialization
231 * routines, so memory can be reused.
232 * Also incorporate implementation of critical region
233 * in function cleanup_module() created by anonymous
234 * linuxer.
235 *
236 * Revision 1.36.4.28 1997/04/25 16:00:00 daniel
237 * Change to support new firmware that solves DCD problem:
238 * application could fail to receive SIGHUP signal when DCD
239 * varying too fast.
240 *
241 * Revision 1.36.4.27 1997/03/26 10:30:00 daniel
242 * Changed for support linux versions 2.1.X.
243 * Backward compatible with linux versions 2.0.X.
244 * Corrected illegal use of filler field in
245 * CH_CTRL struct.
246 * Deleted some debug messages.
247 *
248 * Revision 1.36.4.26 1997/02/27 12:00:00 daniel
249 * Included check for NULL tty pointer in cyz_poll.
250 *
251 * Revision 1.36.4.25 1997/02/26 16:28:30 bentson
252 * Bill Foster at Blarg! Online services noticed that
253 * some of the switch elements of -Z modem control
254 * lacked a closing "break;"
255 *
256 * Revision 1.36.4.24 1997/02/24 11:00:00 daniel
257 * Changed low water threshold for buffer xmit_buf
258 *
259 * Revision 1.36.4.23 1996/12/02 21:50:16 bentson
260 * Marcio provided fix to modem status fetch for -Z
261 *
262 * Revision 1.36.4.22 1996/10/28 22:41:17 bentson
263 * improve mapping of -Z control page (thanks to Steve
264 * Price <stevep@fa.tdktca.com> for help on this)
265 *
266 * Revision 1.36.4.21 1996/09/10 17:00:10 bentson
267 * shift from CPU-bound to memcopy in cyz_polling operation
268 *
269 * Revision 1.36.4.20 1996/09/09 18:30:32 Bentson
270 * Added support to set and report higher speeds.
271 *
272 * Revision 1.36.4.19c 1996/08/09 10:00:00 Marcio Saito
273 * Some fixes in the HW flow control for the BETA release.
274 * Don't try to register the IRQ.
275 *
276 * Revision 1.36.4.19 1996/08/08 16:23:18 Bentson
277 * make sure "cyc" appears in all kernel messages; all soft interrupts
278 * handled by same routine; recognize out-of-band reception; comment
279 * out some diagnostic messages; leave RTS/CTS flow control to hardware;
280 * fix race condition in -Z buffer management; only -Y needs to explicitly
281 * flush chars; tidy up some startup messages;
282 *
283 * Revision 1.36.4.18 1996/07/25 18:57:31 bentson
284 * shift MOD_INC_USE_COUNT location to match
285 * serial.c; purge some diagnostic messages;
286 *
287 * Revision 1.36.4.17 1996/07/25 18:01:08 bentson
288 * enable modem status messages and fetch & process them; note
289 * time of last activity type for each port; set_line_char now
290 * supports more than line 0 and treats 0 baud correctly;
291 * get_modem_info senses rs_status;
292 *
293 * Revision 1.36.4.16 1996/07/20 08:43:15 bentson
294 * barely works--now's time to turn on
295 * more features 'til it breaks
296 *
297 * Revision 1.36.4.15 1996/07/19 22:30:06 bentson
298 * check more -Z board status; shorten boot message
299 *
300 * Revision 1.36.4.14 1996/07/19 22:20:37 bentson
301 * fix reference to ch_ctrl in startup; verify return
302 * values from cyz_issue_cmd and cyz_update_channel;
303 * more stuff to get modem control correct;
304 *
305 * Revision 1.36.4.13 1996/07/11 19:53:33 bentson
306 * more -Z stuff folded in; re-order changes to put -Z stuff
307 * after -Y stuff (to make changes clearer)
308 *
309 * Revision 1.36.4.12 1996/07/11 15:40:55 bentson
310 * Add code to poll Cyclades-Z. Add code to get & set RS-232 control.
311 * Add code to send break. Clear firmware ID word at startup (so
312 * that other code won't talk to inactive board).
313 *
314 * Revision 1.36.4.11 1996/07/09 05:28:29 bentson
315 * add code for -Z in set_line_char
316 *
317 * Revision 1.36.4.10 1996/07/08 19:28:37 bentson
318 * fold more -Z stuff (or in some cases, error messages)
319 * into driver; add text to "don't know what to do" messages.
320 *
321 * Revision 1.36.4.9 1996/07/08 18:38:38 bentson
322 * moved compile-time flags near top of file; cosmetic changes
323 * to narrow text (to allow 2-up printing); changed many declarations
324 * to "static" to limit external symbols; shuffled code order to
325 * coalesce -Y and -Z specific code, also to put internal functions
326 * in order of tty_driver structure; added code to recognize -Z
327 * ports (and for moment, do nothing or report error); add cy_startup
328 * to parse boot command line for extra base addresses for ISA probes;
329 *
330 * Revision 1.36.4.8 1996/06/25 17:40:19 bentson
331 * reorder some code, fix types of some vars (int vs. long),
332 * add cy_setup to support user declared ISA addresses
333 *
334 * Revision 1.36.4.7 1996/06/21 23:06:18 bentson
335 * dump ioctl based firmware load (it's now a user level
336 * program); ensure uninitialzed ports cannot be used
337 *
338 * Revision 1.36.4.6 1996/06/20 23:17:19 bentson
339 * rename vars and restructure some code
340 *
341 * Revision 1.36.4.5 1996/06/14 15:09:44 bentson
342 * get right status back after boot load
343 *
344 * Revision 1.36.4.4 1996/06/13 19:51:44 bentson
345 * successfully loads firmware
346 *
347 * Revision 1.36.4.3 1996/06/13 06:08:33 bentson
348 * add more of the code for the boot/load ioctls
349 *
350 * Revision 1.36.4.2 1996/06/11 21:00:51 bentson
351 * start to add Z functionality--starting with ioctl
352 * for loading firmware
353 *
354 * Revision 1.36.4.1 1996/06/10 18:03:02 bentson
355 * added code to recognize Z/PCI card at initialization; report
356 * presence, but card is not initialized (because firmware needs
357 * to be loaded)
358 *
359 * Revision 1.36.3.8 1996/06/07 16:29:00 bentson
360 * starting minor number at zero; added missing verify_area
361 * as noted by Heiko Eißfeldt <heiko@colossus.escape.de>
362 *
363 * Revision 1.36.3.7 1996/04/19 21:06:18 bentson
364 * remove unneeded boot message & fix CLOCAL hardware flow
365 * control (Miquel van Smoorenburg <miquels@Q.cistron.nl>);
366 * remove unused diagnostic statements; minor 0 is first;
367 *
368 * Revision 1.36.3.6 1996/03/13 13:21:17 marcio
369 * The kernel function vremap (available only in later 1.3.xx kernels)
370 * allows the access to memory addresses above the RAM. This revision
371 * of the driver supports PCI boards below 1Mb (device id 0x100) and
372 * above 1Mb (device id 0x101).
373 *
374 * Revision 1.36.3.5 1996/03/07 15:20:17 bentson
375 * Some global changes to interrupt handling spilled into
376 * this driver--mostly unused arguments in system function
377 * calls. Also added change by Marcio Saito which should
378 * reduce lost interrupts at startup by fast processors.
379 *
380 * Revision 1.36.3.4 1995/11/13 20:45:10 bentson
381 * Changes by Corey Minyard <minyard@wf-rch.cirr.com> distributed
382 * in 1.3.41 kernel to remove a possible race condition, extend
383 * some error messages, and let the driver run as a loadable module
384 * Change by Alan Wendt <alan@ez0.ezlink.com> to remove a
385 * possible race condition.
386 * Change by Marcio Saito <marcio@cyclades.com> to fix PCI addressing.
387 *
388 * Revision 1.36.3.3 1995/11/13 19:44:48 bentson
389 * Changes by Linus Torvalds in 1.3.33 kernel distribution
390 * required due to reordering of driver initialization.
391 * Drivers are now initialized *after* memory management.
392 *
393 * Revision 1.36.3.2 1995/09/08 22:07:14 bentson
394 * remove printk from ISR; fix typo
395 *
396 * Revision 1.36.3.1 1995/09/01 12:00:42 marcio
397 * Minor fixes in the PCI board support. PCI function calls in
398 * conditional compilation (CONFIG_PCI). Thanks to Jim Duncan
399 * <duncan@okay.com>. "bad serial count" message removed.
400 *
401 * Revision 1.36.3 1995/08/22 09:19:42 marcio
402 * Cyclom-Y/PCI support added. Changes in the cy_init routine and
403 * board initialization. Changes in the boot messages. The driver
404 * supports up to 4 boards and 64 ports by default.
405 *
406 * Revision 1.36.1.4 1995/03/29 06:14:14 bentson
407 * disambiguate between Cyclom-16Y and Cyclom-32Ye;
408 *
409 * Revision 1.36.1.3 1995/03/23 22:15:35 bentson
410 * add missing break in modem control block in ioctl switch statement
411 * (discovered by Michael Edward Chastain <mec@jobe.shell.portal.com>);
412 *
413 * Revision 1.36.1.2 1995/03/22 19:16:22 bentson
414 * make sure CTS flow control is set as soon as possible (thanks
415 * to note from David Lambert <lambert@chesapeake.rps.slb.com>);
416 *
417 * Revision 1.36.1.1 1995/03/13 15:44:43 bentson
418 * initialize defaults for receive threshold and stale data timeout;
419 * cosmetic changes;
420 *
421 * Revision 1.36 1995/03/10 23:33:53 bentson
422 * added support of chips 4-7 in 32 port Cyclom-Ye;
423 * fix cy_interrupt pointer dereference problem
424 * (Joe Portman <baron@aa.net>);
425 * give better error response if open is attempted on non-existent port
426 * (Zachariah Vaum <jchryslr@netcom.com>);
427 * correct command timeout (Kenneth Lerman <lerman@@seltd.newnet.com>);
428 * conditional compilation for -16Y on systems with fast, noisy bus;
429 * comment out diagnostic print function;
430 * cleaned up table of base addresses;
431 * set receiver time-out period register to correct value,
432 * set receive threshold to better default values,
433 * set chip timer to more accurate 200 Hz ticking,
434 * add code to monitor and modify receive parameters
435 * (Rik Faith <faith@cs.unc.edu> Nick Simicich
436 * <njs@scifi.emi.net>);
437 *
438 * Revision 1.35 1994/12/16 13:54:18 steffen
439 * additional patch by Marcio Saito for board detection
440 * Accidently left out in 1.34
441 *
442 * Revision 1.34 1994/12/10 12:37:12 steffen
443 * This is the corrected version as suggested by Marcio Saito
444 *
445 * Revision 1.33 1994/12/01 22:41:18 bentson
446 * add hooks to support more high speeds directly; add tytso
447 * patch regarding CLOCAL wakeups
448 *
449 * Revision 1.32 1994/11/23 19:50:04 bentson
450 * allow direct kernel control of higher signalling rates;
451 * look for cards at additional locations
452 *
453 * Revision 1.31 1994/11/16 04:33:28 bentson
454 * ANOTHER fix from Corey Minyard, minyard@wf-rch.cirr.com--
455 * a problem in chars_in_buffer has been resolved by some
456 * small changes; this should yield smoother output
457 *
458 * Revision 1.30 1994/11/16 04:28:05 bentson
459 * Fix from Corey Minyard, Internet: minyard@metronet.com,
460 * UUCP: minyard@wf-rch.cirr.com, WORK: minyardbnr.ca, to
461 * cy_hangup that appears to clear up much (all?) of the
462 * DTR glitches; also he's added/cleaned-up diagnostic messages
463 *
464 * Revision 1.29 1994/11/16 04:16:07 bentson
465 * add change proposed by Ralph Sims, ralphs@halcyon.com, to
466 * operate higher speeds in same way as other serial ports;
467 * add more serial ports (for up to two 16-port muxes).
468 *
469 * Revision 1.28 1994/11/04 00:13:16 root
470 * turn off diagnostic messages
471 *
472 * Revision 1.27 1994/11/03 23:46:37 root
473 * bunch of changes to bring driver into greater conformance
474 * with the serial.c driver (looking for missed fixes)
475 *
476 * Revision 1.26 1994/11/03 22:40:36 root
477 * automatic interrupt probing fixed.
478 *
479 * Revision 1.25 1994/11/03 20:17:02 root
480 * start to implement auto-irq
481 *
482 * Revision 1.24 1994/11/03 18:01:55 root
483 * still working on modem signals--trying not to drop DTR
484 * during the getty/login processes
485 *
486 * Revision 1.23 1994/11/03 17:51:36 root
487 * extend baud rate support; set receive threshold as function
488 * of baud rate; fix some problems with RTS/CTS;
489 *
490 * Revision 1.22 1994/11/02 18:05:35 root
491 * changed arguments to udelay to type long to get
492 * delays to be of correct duration
493 *
494 * Revision 1.21 1994/11/02 17:37:30 root
495 * employ udelay (after calibrating loops_per_second earlier
496 * in init/main.c) instead of using home-grown delay routines
497 *
498 * Revision 1.20 1994/11/02 03:11:38 root
499 * cy_chars_in_buffer forces a return value of 0 to let
500 * login work (don't know why it does); some functions
501 * that were returning EFAULT, now executes the code;
502 * more work on deciding when to disable xmit interrupts;
503 *
504 * Revision 1.19 1994/11/01 20:10:14 root
505 * define routine to start transmission interrupts (by enabling
506 * transmit interrupts); directly enable/disable modem interrupts;
507 *
508 * Revision 1.18 1994/11/01 18:40:45 bentson
509 * Don't always enable transmit interrupts in startup; interrupt on
510 * TxMpty instead of TxRdy to help characters get out before shutdown;
511 * restructure xmit interrupt to check for chars first and quit if
512 * none are ready to go; modem status (MXVRx) is upright, _not_ inverted
513 * (to my view);
514 *
515 * Revision 1.17 1994/10/30 04:39:45 bentson
516 * rename serial_driver and callout_driver to cy_serial_driver and
517 * cy_callout_driver to avoid linkage interference; initialize
518 * info->type to PORT_CIRRUS; ruggedize paranoia test; elide ->port
519 * from cyclades_port structure; add paranoia check to cy_close;
520 *
521 * Revision 1.16 1994/10/30 01:14:33 bentson
522 * change major numbers; add some _early_ return statements;
523 *
524 * Revision 1.15 1994/10/29 06:43:15 bentson
525 * final tidying up for clean compile; enable some error reporting
526 *
527 * Revision 1.14 1994/10/28 20:30:22 Bentson
528 * lots of changes to drag the driver towards the new tty_io
529 * structures and operation. not expected to work, but may
530 * compile cleanly.
531 *
532 * Revision 1.13 1994/07/21 23:08:57 Bentson
533 * add some diagnostic cruft; support 24 lines (for testing
534 * both -8Y and -16Y cards; be more thorough in servicing all
535 * chips during interrupt; add "volatile" a few places to
536 * circumvent compiler optimizations; fix base & offset
537 * computations in block_til_ready (was causing chip 0 to
538 * stop operation)
539 *
540 * Revision 1.12 1994/07/19 16:42:11 Bentson
541 * add some hackery for kernel version 1.1.8; expand
542 * error messages; refine timing for delay loops and
543 * declare loop params volatile
544 *
545 * Revision 1.11 1994/06/11 21:53:10 bentson
546 * get use of save_car right in transmit interrupt service
547 *
548 * Revision 1.10.1.1 1994/06/11 21:31:18 bentson
549 * add some diagnostic printing; try to fix save_car stuff
550 *
551 * Revision 1.10 1994/06/11 20:36:08 bentson
552 * clean up compiler warnings
553 *
554 * Revision 1.9 1994/06/11 19:42:46 bentson
555 * added a bunch of code to support modem signalling
556 *
557 * Revision 1.8 1994/06/11 17:57:07 bentson
558 * recognize break & parity error
559 *
560 * Revision 1.7 1994/06/05 05:51:34 bentson
561 * Reorder baud table to be monotonic; add cli to CP; discard
562 * incoming characters and status if the line isn't open; start to
563 * fold code into cy_throttle; start to port get_serial_info,
564 * set_serial_info, get_modem_info, set_modem_info, and send_break
565 * from serial.c; expand cy_ioctl; relocate and expand config_setup;
566 * get flow control characters from tty struct; invalidate ports w/o
567 * hardware;
568 *
569 * Revision 1.6 1994/05/31 18:42:21 bentson
570 * add a loop-breaker in the interrupt service routine;
571 * note when port is initialized so that it can be shut
572 * down under the right conditions; receive works without
573 * any obvious errors
574 *
575 * Revision 1.5 1994/05/30 00:55:02 bentson
576 * transmit works without obvious errors
577 *
578 * Revision 1.4 1994/05/27 18:46:27 bentson
579 * incorporated more code from lib_y.c; can now print short
580 * strings under interrupt control to port zero; seems to
581 * select ports/channels/lines correctly
582 *
583 * Revision 1.3 1994/05/25 22:12:44 bentson
584 * shifting from multi-port on a card to proper multiplexor
585 * data structures; added skeletons of most routines
586 *
587 * Revision 1.2 1994/05/19 13:21:43 bentson
588 * start to crib from other sources
589 *
590 */
591
592 #define CY_VERSION "2.5"
593
594 /* If you need to install more boards than NR_CARDS, change the constant
595 in the definition below. No other change is necessary to support up to
596 eight boards. Beyond that you'll have to extend cy_isa_addresses. */
597
598 #define NR_CARDS 4
599
600 /*
601 If the total number of ports is larger than NR_PORTS, change this
602 constant in the definition below. No other change is necessary to
603 support more boards/ports. */
604
605 #define NR_PORTS 256
606
607 #define ZE_V1_NPORTS 64
608 #define ZO_V1 0
609 #define ZO_V2 1
610 #define ZE_V1 2
611
612 #define SERIAL_PARANOIA_CHECK
613 #undef CY_DEBUG_OPEN
614 #undef CY_DEBUG_THROTTLE
615 #undef CY_DEBUG_OTHER
616 #undef CY_DEBUG_IO
617 #undef CY_DEBUG_COUNT
618 #undef CY_DEBUG_DTR
619 #undef CY_DEBUG_WAIT_UNTIL_SENT
620 #undef CY_DEBUG_INTERRUPTS
621 #undef CY_16Y_HACK
622 #undef CY_ENABLE_MONITORING
623 #undef CY_PCI_DEBUG
624
625 /*
626 * Include section
627 */
628 #include <linux/module.h>
629 #include <linux/errno.h>
630 #include <linux/signal.h>
631 #include <linux/sched.h>
632 #include <linux/timer.h>
633 #include <linux/interrupt.h>
634 #include <linux/tty.h>
635 #include <linux/tty_flip.h>
636 #include <linux/serial.h>
637 #include <linux/major.h>
638 #include <linux/string.h>
639 #include <linux/fcntl.h>
640 #include <linux/ptrace.h>
641 #include <linux/cyclades.h>
642 #include <linux/mm.h>
643 #include <linux/ioport.h>
644 #include <linux/init.h>
645 #include <linux/delay.h>
646 #include <linux/spinlock.h>
647 #include <linux/bitops.h>
648 #include <linux/firmware.h>
649
650 #include <asm/system.h>
651 #include <linux/io.h>
652 #include <asm/irq.h>
653 #include <linux/uaccess.h>
654
655 #include <linux/kernel.h>
656 #include <linux/pci.h>
657
658 #include <linux/stat.h>
659 #include <linux/proc_fs.h>
660
661 static void cy_throttle(struct tty_struct *tty);
662 static void cy_send_xchar(struct tty_struct *tty, char ch);
663
664 #define IS_CYC_Z(card) ((card).num_chips == (unsigned int)-1)
665
666 #define Z_FPGA_CHECK(card) \
667 ((readl(&((struct RUNTIME_9060 __iomem *) \
668 ((card).ctl_addr))->init_ctrl) & (1<<17)) != 0)
669
670 #define ISZLOADED(card) (((ZO_V1 == readl(&((struct RUNTIME_9060 __iomem *) \
671 ((card).ctl_addr))->mail_box_0)) || \
672 Z_FPGA_CHECK(card)) && \
673 (ZFIRM_ID == readl(&((struct FIRM_ID __iomem *) \
674 ((card).base_addr+ID_ADDRESS))->signature)))
675
676 #ifndef SERIAL_XMIT_SIZE
677 #define SERIAL_XMIT_SIZE (min(PAGE_SIZE, 4096))
678 #endif
679 #define WAKEUP_CHARS 256
680
681 #define STD_COM_FLAGS (0)
682
683 /* firmware stuff */
684 #define ZL_MAX_BLOCKS 16
685 #define DRIVER_VERSION 0x02010203
686 #define RAM_SIZE 0x80000
687
688 #define Z_FPGA_LOADED(X) ((readl(&(X)->init_ctrl) & (1<<17)) != 0)
689
690 enum zblock_type {
691 ZBLOCK_PRG = 0,
692 ZBLOCK_FPGA = 1
693 };
694
695 struct zfile_header {
696 char name[64];
697 char date[32];
698 char aux[32];
699 u32 n_config;
700 u32 config_offset;
701 u32 n_blocks;
702 u32 block_offset;
703 u32 reserved[9];
704 } __attribute__ ((packed));
705
706 struct zfile_config {
707 char name[64];
708 u32 mailbox;
709 u32 function;
710 u32 n_blocks;
711 u32 block_list[ZL_MAX_BLOCKS];
712 } __attribute__ ((packed));
713
714 struct zfile_block {
715 u32 type;
716 u32 file_offset;
717 u32 ram_offset;
718 u32 size;
719 } __attribute__ ((packed));
720
721 static struct tty_driver *cy_serial_driver;
722
723 #ifdef CONFIG_ISA
724 /* This is the address lookup table. The driver will probe for
725 Cyclom-Y/ISA boards at all addresses in here. If you want the
726 driver to probe addresses at a different address, add it to
727 this table. If the driver is probing some other board and
728 causing problems, remove the offending address from this table.
729 */
730
731 static unsigned int cy_isa_addresses[] = {
732 0xD0000,
733 0xD2000,
734 0xD4000,
735 0xD6000,
736 0xD8000,
737 0xDA000,
738 0xDC000,
739 0xDE000,
740 0, 0, 0, 0, 0, 0, 0, 0
741 };
742
743 #define NR_ISA_ADDRS ARRAY_SIZE(cy_isa_addresses)
744
745 #ifdef MODULE
746 static long maddr[NR_CARDS];
747 static int irq[NR_CARDS];
748
749 module_param_array(maddr, long, NULL, 0);
750 module_param_array(irq, int, NULL, 0);
751 #endif
752
753 #endif /* CONFIG_ISA */
754
755 /* This is the per-card data structure containing address, irq, number of
756 channels, etc. This driver supports a maximum of NR_CARDS cards.
757 */
758 static struct cyclades_card cy_card[NR_CARDS];
759
760 static int cy_next_channel; /* next minor available */
761
762 /*
763 * This is used to look up the divisor speeds and the timeouts
764 * We're normally limited to 15 distinct baud rates. The extra
765 * are accessed via settings in info->flags.
766 * 0, 1, 2, 3, 4, 5, 6, 7, 8, 9,
767 * 10, 11, 12, 13, 14, 15, 16, 17, 18, 19,
768 * HI VHI
769 * 20
770 */
771 static int baud_table[] = {
772 0, 50, 75, 110, 134, 150, 200, 300, 600, 1200,
773 1800, 2400, 4800, 9600, 19200, 38400, 57600, 76800, 115200, 150000,
774 230400, 0
775 };
776
777 static char baud_co_25[] = { /* 25 MHz clock option table */
778 /* value => 00 01 02 03 04 */
779 /* divide by 8 32 128 512 2048 */
780 0x00, 0x04, 0x04, 0x04, 0x04, 0x04, 0x03, 0x03, 0x03, 0x02,
781 0x02, 0x02, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
782 };
783
784 static char baud_bpr_25[] = { /* 25 MHz baud rate period table */
785 0x00, 0xf5, 0xa3, 0x6f, 0x5c, 0x51, 0xf5, 0xa3, 0x51, 0xa3,
786 0x6d, 0x51, 0xa3, 0x51, 0xa3, 0x51, 0x36, 0x29, 0x1b, 0x15
787 };
788
789 static char baud_co_60[] = { /* 60 MHz clock option table (CD1400 J) */
790 /* value => 00 01 02 03 04 */
791 /* divide by 8 32 128 512 2048 */
792 0x00, 0x00, 0x00, 0x04, 0x04, 0x04, 0x04, 0x04, 0x03, 0x03,
793 0x03, 0x02, 0x02, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00,
794 0x00
795 };
796
797 static char baud_bpr_60[] = { /* 60 MHz baud rate period table (CD1400 J) */
798 0x00, 0x82, 0x21, 0xff, 0xdb, 0xc3, 0x92, 0x62, 0xc3, 0x62,
799 0x41, 0xc3, 0x62, 0xc3, 0x62, 0xc3, 0x82, 0x62, 0x41, 0x32,
800 0x21
801 };
802
803 static char baud_cor3[] = { /* receive threshold */
804 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a,
805 0x0a, 0x0a, 0x0a, 0x09, 0x09, 0x08, 0x08, 0x08, 0x08, 0x07,
806 0x07
807 };
808
809 /*
810 * The Cyclades driver implements HW flow control as any serial driver.
811 * The cyclades_port structure member rflow and the vector rflow_thr
812 * allows us to take advantage of a special feature in the CD1400 to avoid
813 * data loss even when the system interrupt latency is too high. These flags
814 * are to be used only with very special applications. Setting these flags
815 * requires the use of a special cable (DTR and RTS reversed). In the new
816 * CD1400-based boards (rev. 6.00 or later), there is no need for special
817 * cables.
818 */
819
820 static char rflow_thr[] = { /* rflow threshold */
821 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
822 0x00, 0x00, 0x00, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a,
823 0x0a
824 };
825
826 /* The Cyclom-Ye has placed the sequential chips in non-sequential
827 * address order. This look-up table overcomes that problem.
828 */
829 static int cy_chip_offset[] = { 0x0000,
830 0x0400,
831 0x0800,
832 0x0C00,
833 0x0200,
834 0x0600,
835 0x0A00,
836 0x0E00
837 };
838
839 /* PCI related definitions */
840
841 #ifdef CONFIG_PCI
842 static struct pci_device_id cy_pci_dev_id[] __devinitdata = {
843 /* PCI < 1Mb */
844 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Y_Lo) },
845 /* PCI > 1Mb */
846 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Y_Hi) },
847 /* 4Y PCI < 1Mb */
848 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_4Y_Lo) },
849 /* 4Y PCI > 1Mb */
850 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_4Y_Hi) },
851 /* 8Y PCI < 1Mb */
852 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_8Y_Lo) },
853 /* 8Y PCI > 1Mb */
854 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_8Y_Hi) },
855 /* Z PCI < 1Mb */
856 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Z_Lo) },
857 /* Z PCI > 1Mb */
858 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Z_Hi) },
859 { } /* end of table */
860 };
861 MODULE_DEVICE_TABLE(pci, cy_pci_dev_id);
862 #endif
863
864 static void cy_start(struct tty_struct *);
865 static void set_line_char(struct cyclades_port *);
866 static int cyz_issue_cmd(struct cyclades_card *, __u32, __u8, __u32);
867 #ifdef CONFIG_ISA
868 static unsigned detect_isa_irq(void __iomem *);
869 #endif /* CONFIG_ISA */
870
871 static int cyclades_get_proc_info(char *, char **, off_t, int, int *, void *);
872
873 #ifndef CONFIG_CYZ_INTR
874 static void cyz_poll(unsigned long);
875
876 /* The Cyclades-Z polling cycle is defined by this variable */
877 static long cyz_polling_cycle = CZ_DEF_POLL;
878
879 static DEFINE_TIMER(cyz_timerlist, cyz_poll, 0, 0);
880
881 #else /* CONFIG_CYZ_INTR */
882 static void cyz_rx_restart(unsigned long);
883 static struct timer_list cyz_rx_full_timer[NR_PORTS];
884 #endif /* CONFIG_CYZ_INTR */
885
886 static inline int serial_paranoia_check(struct cyclades_port *info,
887 char *name, const char *routine)
888 {
889 #ifdef SERIAL_PARANOIA_CHECK
890 if (!info) {
891 printk(KERN_WARNING "cyc Warning: null cyclades_port for (%s) "
892 "in %s\n", name, routine);
893 return 1;
894 }
895
896 if (info->magic != CYCLADES_MAGIC) {
897 printk(KERN_WARNING "cyc Warning: bad magic number for serial "
898 "struct (%s) in %s\n", name, routine);
899 return 1;
900 }
901 #endif
902 return 0;
903 } /* serial_paranoia_check */
904
905 /***********************************************************/
906 /********* Start of block of Cyclom-Y specific code ********/
907
908 /* This routine waits up to 1000 micro-seconds for the previous
909 command to the Cirrus chip to complete and then issues the
910 new command. An error is returned if the previous command
911 didn't finish within the time limit.
912
913 This function is only called from inside spinlock-protected code.
914 */
915 static int cyy_issue_cmd(void __iomem *base_addr, u_char cmd, int index)
916 {
917 unsigned int i;
918
919 /* Check to see that the previous command has completed */
920 for (i = 0; i < 100; i++) {
921 if (readb(base_addr + (CyCCR << index)) == 0)
922 break;
923 udelay(10L);
924 }
925 /* if the CCR never cleared, the previous command
926 didn't finish within the "reasonable time" */
927 if (i == 100)
928 return -1;
929
930 /* Issue the new command */
931 cy_writeb(base_addr + (CyCCR << index), cmd);
932
933 return 0;
934 } /* cyy_issue_cmd */
935
936 #ifdef CONFIG_ISA
937 /* ISA interrupt detection code */
938 static unsigned detect_isa_irq(void __iomem *address)
939 {
940 int irq;
941 unsigned long irqs, flags;
942 int save_xir, save_car;
943 int index = 0; /* IRQ probing is only for ISA */
944
945 /* forget possible initially masked and pending IRQ */
946 irq = probe_irq_off(probe_irq_on());
947
948 /* Clear interrupts on the board first */
949 cy_writeb(address + (Cy_ClrIntr << index), 0);
950 /* Cy_ClrIntr is 0x1800 */
951
952 irqs = probe_irq_on();
953 /* Wait ... */
954 udelay(5000L);
955
956 /* Enable the Tx interrupts on the CD1400 */
957 local_irq_save(flags);
958 cy_writeb(address + (CyCAR << index), 0);
959 cyy_issue_cmd(address, CyCHAN_CTL | CyENB_XMTR, index);
960
961 cy_writeb(address + (CyCAR << index), 0);
962 cy_writeb(address + (CySRER << index),
963 readb(address + (CySRER << index)) | CyTxRdy);
964 local_irq_restore(flags);
965
966 /* Wait ... */
967 udelay(5000L);
968
969 /* Check which interrupt is in use */
970 irq = probe_irq_off(irqs);
971
972 /* Clean up */
973 save_xir = (u_char) readb(address + (CyTIR << index));
974 save_car = readb(address + (CyCAR << index));
975 cy_writeb(address + (CyCAR << index), (save_xir & 0x3));
976 cy_writeb(address + (CySRER << index),
977 readb(address + (CySRER << index)) & ~CyTxRdy);
978 cy_writeb(address + (CyTIR << index), (save_xir & 0x3f));
979 cy_writeb(address + (CyCAR << index), (save_car));
980 cy_writeb(address + (Cy_ClrIntr << index), 0);
981 /* Cy_ClrIntr is 0x1800 */
982
983 return (irq > 0) ? irq : 0;
984 }
985 #endif /* CONFIG_ISA */
986
987 static void cyy_chip_rx(struct cyclades_card *cinfo, int chip,
988 void __iomem *base_addr)
989 {
990 struct cyclades_port *info;
991 struct tty_struct *tty;
992 int len, index = cinfo->bus_index;
993 u8 save_xir, channel, save_car, data, char_count;
994
995 #ifdef CY_DEBUG_INTERRUPTS
996 printk(KERN_DEBUG "cyy_interrupt: rcvd intr, chip %d\n", chip);
997 #endif
998 /* determine the channel & change to that context */
999 save_xir = readb(base_addr + (CyRIR << index));
1000 channel = save_xir & CyIRChannel;
1001 info = &cinfo->ports[channel + chip * 4];
1002 save_car = readb(base_addr + (CyCAR << index));
1003 cy_writeb(base_addr + (CyCAR << index), save_xir);
1004
1005 /* if there is nowhere to put the data, discard it */
1006 if (info->tty == NULL) {
1007 if ((readb(base_addr + (CyRIVR << index)) & CyIVRMask) ==
1008 CyIVRRxEx) { /* exception */
1009 data = readb(base_addr + (CyRDSR << index));
1010 } else { /* normal character reception */
1011 char_count = readb(base_addr + (CyRDCR << index));
1012 while (char_count--)
1013 data = readb(base_addr + (CyRDSR << index));
1014 }
1015 goto end;
1016 }
1017 /* there is an open port for this data */
1018 tty = info->tty;
1019 if ((readb(base_addr + (CyRIVR << index)) & CyIVRMask) ==
1020 CyIVRRxEx) { /* exception */
1021 data = readb(base_addr + (CyRDSR << index));
1022
1023 /* For statistics only */
1024 if (data & CyBREAK)
1025 info->icount.brk++;
1026 else if (data & CyFRAME)
1027 info->icount.frame++;
1028 else if (data & CyPARITY)
1029 info->icount.parity++;
1030 else if (data & CyOVERRUN)
1031 info->icount.overrun++;
1032
1033 if (data & info->ignore_status_mask) {
1034 info->icount.rx++;
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 }
1120
1121 static void cyy_chip_tx(struct cyclades_card *cinfo, unsigned int chip,
1122 void __iomem *base_addr)
1123 {
1124 struct cyclades_port *info;
1125 int char_count, index = cinfo->bus_index;
1126 u8 save_xir, channel, save_car, outch;
1127
1128 /* Since we only get here when the transmit buffer
1129 is empty, we know we can always stuff a dozen
1130 characters. */
1131 #ifdef CY_DEBUG_INTERRUPTS
1132 printk(KERN_DEBUG "cyy_interrupt: xmit intr, chip %d\n", chip);
1133 #endif
1134
1135 /* determine the channel & change to that context */
1136 save_xir = readb(base_addr + (CyTIR << index));
1137 channel = save_xir & CyIRChannel;
1138 save_car = readb(base_addr + (CyCAR << index));
1139 cy_writeb(base_addr + (CyCAR << index), save_xir);
1140
1141 /* validate the port# (as configured and open) */
1142 if (channel + chip * 4 >= cinfo->nports) {
1143 cy_writeb(base_addr + (CySRER << index),
1144 readb(base_addr + (CySRER << index)) & ~CyTxRdy);
1145 goto end;
1146 }
1147 info = &cinfo->ports[channel + chip * 4];
1148 if (info->tty == NULL) {
1149 cy_writeb(base_addr + (CySRER << index),
1150 readb(base_addr + (CySRER << index)) & ~CyTxRdy);
1151 goto end;
1152 }
1153
1154 /* load the on-chip space for outbound data */
1155 char_count = info->xmit_fifo_size;
1156
1157 if (info->x_char) { /* send special char */
1158 outch = info->x_char;
1159 cy_writeb(base_addr + (CyTDR << index), outch);
1160 char_count--;
1161 info->icount.tx++;
1162 info->x_char = 0;
1163 }
1164
1165 if (info->breakon || info->breakoff) {
1166 if (info->breakon) {
1167 cy_writeb(base_addr + (CyTDR << index), 0);
1168 cy_writeb(base_addr + (CyTDR << index), 0x81);
1169 info->breakon = 0;
1170 char_count -= 2;
1171 }
1172 if (info->breakoff) {
1173 cy_writeb(base_addr + (CyTDR << index), 0);
1174 cy_writeb(base_addr + (CyTDR << index), 0x83);
1175 info->breakoff = 0;
1176 char_count -= 2;
1177 }
1178 }
1179
1180 while (char_count-- > 0) {
1181 if (!info->xmit_cnt) {
1182 if (readb(base_addr + (CySRER << index)) & CyTxMpty) {
1183 cy_writeb(base_addr + (CySRER << index),
1184 readb(base_addr + (CySRER << index)) &
1185 ~CyTxMpty);
1186 } else {
1187 cy_writeb(base_addr + (CySRER << index),
1188 (readb(base_addr + (CySRER << index)) &
1189 ~CyTxRdy) | CyTxMpty);
1190 }
1191 goto done;
1192 }
1193 if (info->xmit_buf == NULL) {
1194 cy_writeb(base_addr + (CySRER << index),
1195 readb(base_addr + (CySRER << index)) &
1196 ~CyTxRdy);
1197 goto done;
1198 }
1199 if (info->tty->stopped || info->tty->hw_stopped) {
1200 cy_writeb(base_addr + (CySRER << index),
1201 readb(base_addr + (CySRER << index)) &
1202 ~CyTxRdy);
1203 goto done;
1204 }
1205 /* Because the Embedded Transmit Commands have been enabled,
1206 * we must check to see if the escape character, NULL, is being
1207 * sent. If it is, we must ensure that there is room for it to
1208 * be doubled in the output stream. Therefore we no longer
1209 * advance the pointer when the character is fetched, but
1210 * rather wait until after the check for a NULL output
1211 * character. This is necessary because there may not be room
1212 * for the two chars needed to send a NULL.)
1213 */
1214 outch = info->xmit_buf[info->xmit_tail];
1215 if (outch) {
1216 info->xmit_cnt--;
1217 info->xmit_tail = (info->xmit_tail + 1) &
1218 (SERIAL_XMIT_SIZE - 1);
1219 cy_writeb(base_addr + (CyTDR << index), outch);
1220 info->icount.tx++;
1221 } else {
1222 if (char_count > 1) {
1223 info->xmit_cnt--;
1224 info->xmit_tail = (info->xmit_tail + 1) &
1225 (SERIAL_XMIT_SIZE - 1);
1226 cy_writeb(base_addr + (CyTDR << index), outch);
1227 cy_writeb(base_addr + (CyTDR << index), 0);
1228 info->icount.tx++;
1229 char_count--;
1230 }
1231 }
1232 }
1233
1234 done:
1235 tty_wakeup(info->tty);
1236 end:
1237 /* end of service */
1238 cy_writeb(base_addr + (CyTIR << index), save_xir & 0x3f);
1239 cy_writeb(base_addr + (CyCAR << index), save_car);
1240 }
1241
1242 static void cyy_chip_modem(struct cyclades_card *cinfo, int chip,
1243 void __iomem *base_addr)
1244 {
1245 struct cyclades_port *info;
1246 int index = cinfo->bus_index;
1247 u8 save_xir, channel, save_car, mdm_change, mdm_status;
1248
1249 /* determine the channel & change to that context */
1250 save_xir = readb(base_addr + (CyMIR << index));
1251 channel = save_xir & CyIRChannel;
1252 info = &cinfo->ports[channel + chip * 4];
1253 save_car = readb(base_addr + (CyCAR << index));
1254 cy_writeb(base_addr + (CyCAR << index), save_xir);
1255
1256 mdm_change = readb(base_addr + (CyMISR << index));
1257 mdm_status = readb(base_addr + (CyMSVR1 << index));
1258
1259 if (!info->tty)
1260 goto end;
1261
1262 if (mdm_change & CyANY_DELTA) {
1263 /* For statistics only */
1264 if (mdm_change & CyDCD)
1265 info->icount.dcd++;
1266 if (mdm_change & CyCTS)
1267 info->icount.cts++;
1268 if (mdm_change & CyDSR)
1269 info->icount.dsr++;
1270 if (mdm_change & CyRI)
1271 info->icount.rng++;
1272
1273 wake_up_interruptible(&info->delta_msr_wait);
1274 }
1275
1276 if ((mdm_change & CyDCD) && (info->flags & ASYNC_CHECK_CD)) {
1277 if (!(mdm_status & CyDCD)) {
1278 tty_hangup(info->tty);
1279 info->flags &= ~ASYNC_NORMAL_ACTIVE;
1280 }
1281 wake_up_interruptible(&info->open_wait);
1282 }
1283 if ((mdm_change & CyCTS) && (info->flags & ASYNC_CTS_FLOW)) {
1284 if (info->tty->hw_stopped) {
1285 if (mdm_status & CyCTS) {
1286 /* cy_start isn't used
1287 because... !!! */
1288 info->tty->hw_stopped = 0;
1289 cy_writeb(base_addr + (CySRER << index),
1290 readb(base_addr + (CySRER << index)) |
1291 CyTxRdy);
1292 tty_wakeup(info->tty);
1293 }
1294 } else {
1295 if (!(mdm_status & CyCTS)) {
1296 /* cy_stop isn't used
1297 because ... !!! */
1298 info->tty->hw_stopped = 1;
1299 cy_writeb(base_addr + (CySRER << index),
1300 readb(base_addr + (CySRER << index)) &
1301 ~CyTxRdy);
1302 }
1303 }
1304 }
1305 /* if (mdm_change & CyDSR) {
1306 }
1307 if (mdm_change & CyRI) {
1308 }*/
1309 end:
1310 /* end of service */
1311 cy_writeb(base_addr + (CyMIR << index), save_xir & 0x3f);
1312 cy_writeb(base_addr + (CyCAR << index), save_car);
1313 }
1314
1315 /* The real interrupt service routine is called
1316 whenever the card wants its hand held--chars
1317 received, out buffer empty, modem change, etc.
1318 */
1319 static irqreturn_t cyy_interrupt(int irq, void *dev_id)
1320 {
1321 int status;
1322 struct cyclades_card *cinfo = dev_id;
1323 void __iomem *base_addr, *card_base_addr;
1324 unsigned int chip, too_many, had_work;
1325 int index;
1326
1327 if (unlikely(cinfo == NULL)) {
1328 #ifdef CY_DEBUG_INTERRUPTS
1329 printk(KERN_DEBUG "cyy_interrupt: spurious interrupt %d\n",
1330 irq);
1331 #endif
1332 return IRQ_NONE; /* spurious interrupt */
1333 }
1334
1335 card_base_addr = cinfo->base_addr;
1336 index = cinfo->bus_index;
1337
1338 /* card was not initialized yet (e.g. DEBUG_SHIRQ) */
1339 if (unlikely(card_base_addr == NULL))
1340 return IRQ_HANDLED;
1341
1342 /* This loop checks all chips in the card. Make a note whenever
1343 _any_ chip had some work to do, as this is considered an
1344 indication that there will be more to do. Only when no chip
1345 has any work does this outermost loop exit.
1346 */
1347 do {
1348 had_work = 0;
1349 for (chip = 0; chip < cinfo->num_chips; chip++) {
1350 base_addr = cinfo->base_addr +
1351 (cy_chip_offset[chip] << index);
1352 too_many = 0;
1353 while ((status = readb(base_addr +
1354 (CySVRR << index))) != 0x00) {
1355 had_work++;
1356 /* The purpose of the following test is to ensure that
1357 no chip can monopolize the driver. This forces the
1358 chips to be checked in a round-robin fashion (after
1359 draining each of a bunch (1000) of characters).
1360 */
1361 if (1000 < too_many++)
1362 break;
1363 spin_lock(&cinfo->card_lock);
1364 if (status & CySRReceive) /* rx intr */
1365 cyy_chip_rx(cinfo, chip, base_addr);
1366 if (status & CySRTransmit) /* tx intr */
1367 cyy_chip_tx(cinfo, chip, base_addr);
1368 if (status & CySRModem) /* modem intr */
1369 cyy_chip_modem(cinfo, chip, base_addr);
1370 spin_unlock(&cinfo->card_lock);
1371 }
1372 }
1373 } while (had_work);
1374
1375 /* clear interrupts */
1376 spin_lock(&cinfo->card_lock);
1377 cy_writeb(card_base_addr + (Cy_ClrIntr << index), 0);
1378 /* Cy_ClrIntr is 0x1800 */
1379 spin_unlock(&cinfo->card_lock);
1380 return IRQ_HANDLED;
1381 } /* cyy_interrupt */
1382
1383 /***********************************************************/
1384 /********* End of block of Cyclom-Y specific code **********/
1385 /******** Start of block of Cyclades-Z specific code *******/
1386 /***********************************************************/
1387
1388 static int
1389 cyz_fetch_msg(struct cyclades_card *cinfo,
1390 __u32 *channel, __u8 *cmd, __u32 *param)
1391 {
1392 struct FIRM_ID __iomem *firm_id;
1393 struct ZFW_CTRL __iomem *zfw_ctrl;
1394 struct BOARD_CTRL __iomem *board_ctrl;
1395 unsigned long loc_doorbell;
1396
1397 firm_id = cinfo->base_addr + ID_ADDRESS;
1398 if (!ISZLOADED(*cinfo))
1399 return -1;
1400 zfw_ctrl = cinfo->base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
1401 board_ctrl = &zfw_ctrl->board_ctrl;
1402
1403 loc_doorbell = readl(&((struct RUNTIME_9060 __iomem *)
1404 (cinfo->ctl_addr))->loc_doorbell);
1405 if (loc_doorbell) {
1406 *cmd = (char)(0xff & loc_doorbell);
1407 *channel = readl(&board_ctrl->fwcmd_channel);
1408 *param = (__u32) readl(&board_ctrl->fwcmd_param);
1409 cy_writel(&((struct RUNTIME_9060 __iomem *)(cinfo->ctl_addr))->
1410 loc_doorbell, 0xffffffff);
1411 return 1;
1412 }
1413 return 0;
1414 } /* cyz_fetch_msg */
1415
1416 static int
1417 cyz_issue_cmd(struct cyclades_card *cinfo,
1418 __u32 channel, __u8 cmd, __u32 param)
1419 {
1420 struct FIRM_ID __iomem *firm_id;
1421 struct ZFW_CTRL __iomem *zfw_ctrl;
1422 struct BOARD_CTRL __iomem *board_ctrl;
1423 __u32 __iomem *pci_doorbell;
1424 unsigned int index;
1425
1426 firm_id = cinfo->base_addr + ID_ADDRESS;
1427 if (!ISZLOADED(*cinfo))
1428 return -1;
1429
1430 zfw_ctrl = cinfo->base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
1431 board_ctrl = &zfw_ctrl->board_ctrl;
1432
1433 index = 0;
1434 pci_doorbell =
1435 &((struct RUNTIME_9060 __iomem *)(cinfo->ctl_addr))->pci_doorbell;
1436 while ((readl(pci_doorbell) & 0xff) != 0) {
1437 if (index++ == 1000)
1438 return (int)(readl(pci_doorbell) & 0xff);
1439 udelay(50L);
1440 }
1441 cy_writel(&board_ctrl->hcmd_channel, channel);
1442 cy_writel(&board_ctrl->hcmd_param, param);
1443 cy_writel(pci_doorbell, (long)cmd);
1444
1445 return 0;
1446 } /* cyz_issue_cmd */
1447
1448 static void cyz_handle_rx(struct cyclades_port *info,
1449 struct BUF_CTRL __iomem *buf_ctrl)
1450 {
1451 struct cyclades_card *cinfo = info->card;
1452 struct tty_struct *tty = info->tty;
1453 unsigned int char_count;
1454 int len;
1455 #ifdef BLOCKMOVE
1456 unsigned char *buf;
1457 #else
1458 char data;
1459 #endif
1460 __u32 rx_put, rx_get, new_rx_get, rx_bufsize, rx_bufaddr;
1461
1462 rx_get = new_rx_get = readl(&buf_ctrl->rx_get);
1463 rx_put = readl(&buf_ctrl->rx_put);
1464 rx_bufsize = readl(&buf_ctrl->rx_bufsize);
1465 rx_bufaddr = readl(&buf_ctrl->rx_bufaddr);
1466 if (rx_put >= rx_get)
1467 char_count = rx_put - rx_get;
1468 else
1469 char_count = rx_put - rx_get + rx_bufsize;
1470
1471 if (char_count) {
1472 #ifdef CY_ENABLE_MONITORING
1473 info->mon.int_count++;
1474 info->mon.char_count += char_count;
1475 if (char_count > info->mon.char_max)
1476 info->mon.char_max = char_count;
1477 info->mon.char_last = char_count;
1478 #endif
1479 if (tty == NULL) {
1480 /* flush received characters */
1481 new_rx_get = (new_rx_get + char_count) &
1482 (rx_bufsize - 1);
1483 info->rflush_count++;
1484 } else {
1485 #ifdef BLOCKMOVE
1486 /* we'd like to use memcpy(t, f, n) and memset(s, c, count)
1487 for performance, but because of buffer boundaries, there
1488 may be several steps to the operation */
1489 while (1) {
1490 len = tty_prepare_flip_string(tty, &buf,
1491 char_count);
1492 if (!len)
1493 break;
1494
1495 len = min_t(unsigned int, min(len, char_count),
1496 rx_bufsize - new_rx_get);
1497
1498 memcpy_fromio(buf, cinfo->base_addr +
1499 rx_bufaddr + new_rx_get, len);
1500
1501 new_rx_get = (new_rx_get + len) &
1502 (rx_bufsize - 1);
1503 char_count -= len;
1504 info->icount.rx += len;
1505 info->idle_stats.recv_bytes += len;
1506 }
1507 #else
1508 len = tty_buffer_request_room(tty, char_count);
1509 while (len--) {
1510 data = readb(cinfo->base_addr + rx_bufaddr +
1511 new_rx_get);
1512 new_rx_get = (new_rx_get + 1) &
1513 (rx_bufsize - 1);
1514 tty_insert_flip_char(tty, data, TTY_NORMAL);
1515 info->idle_stats.recv_bytes++;
1516 info->icount.rx++;
1517 }
1518 #endif
1519 #ifdef CONFIG_CYZ_INTR
1520 /* Recalculate the number of chars in the RX buffer and issue
1521 a cmd in case it's higher than the RX high water mark */
1522 rx_put = readl(&buf_ctrl->rx_put);
1523 if (rx_put >= rx_get)
1524 char_count = rx_put - rx_get;
1525 else
1526 char_count = rx_put - rx_get + rx_bufsize;
1527 if (char_count >= readl(&buf_ctrl->rx_threshold) &&
1528 !timer_pending(&cyz_rx_full_timer[
1529 info->line]))
1530 mod_timer(&cyz_rx_full_timer[info->line],
1531 jiffies + 1);
1532 #endif
1533 info->idle_stats.recv_idle = jiffies;
1534 tty_schedule_flip(tty);
1535 }
1536 /* Update rx_get */
1537 cy_writel(&buf_ctrl->rx_get, new_rx_get);
1538 }
1539 }
1540
1541 static void cyz_handle_tx(struct cyclades_port *info,
1542 struct BUF_CTRL __iomem *buf_ctrl)
1543 {
1544 struct cyclades_card *cinfo = info->card;
1545 struct tty_struct *tty = info->tty;
1546 u8 data;
1547 unsigned int char_count;
1548 #ifdef BLOCKMOVE
1549 int small_count;
1550 #endif
1551 __u32 tx_put, tx_get, tx_bufsize, tx_bufaddr;
1552
1553 if (info->xmit_cnt <= 0) /* Nothing to transmit */
1554 return;
1555
1556 tx_get = readl(&buf_ctrl->tx_get);
1557 tx_put = readl(&buf_ctrl->tx_put);
1558 tx_bufsize = readl(&buf_ctrl->tx_bufsize);
1559 tx_bufaddr = readl(&buf_ctrl->tx_bufaddr);
1560 if (tx_put >= tx_get)
1561 char_count = tx_get - tx_put - 1 + tx_bufsize;
1562 else
1563 char_count = tx_get - tx_put - 1;
1564
1565 if (char_count) {
1566
1567 if (tty == NULL)
1568 goto ztxdone;
1569
1570 if (info->x_char) { /* send special char */
1571 data = info->x_char;
1572
1573 cy_writeb(cinfo->base_addr + tx_bufaddr + tx_put, data);
1574 tx_put = (tx_put + 1) & (tx_bufsize - 1);
1575 info->x_char = 0;
1576 char_count--;
1577 info->icount.tx++;
1578 }
1579 #ifdef BLOCKMOVE
1580 while (0 < (small_count = min_t(unsigned int,
1581 tx_bufsize - tx_put, min_t(unsigned int,
1582 (SERIAL_XMIT_SIZE - info->xmit_tail),
1583 min_t(unsigned int, info->xmit_cnt,
1584 char_count))))) {
1585
1586 memcpy_toio((char *)(cinfo->base_addr + tx_bufaddr +
1587 tx_put),
1588 &info->xmit_buf[info->xmit_tail],
1589 small_count);
1590
1591 tx_put = (tx_put + small_count) & (tx_bufsize - 1);
1592 char_count -= small_count;
1593 info->icount.tx += small_count;
1594 info->xmit_cnt -= small_count;
1595 info->xmit_tail = (info->xmit_tail + small_count) &
1596 (SERIAL_XMIT_SIZE - 1);
1597 }
1598 #else
1599 while (info->xmit_cnt && char_count) {
1600 data = info->xmit_buf[info->xmit_tail];
1601 info->xmit_cnt--;
1602 info->xmit_tail = (info->xmit_tail + 1) &
1603 (SERIAL_XMIT_SIZE - 1);
1604
1605 cy_writeb(cinfo->base_addr + tx_bufaddr + tx_put, data);
1606 tx_put = (tx_put + 1) & (tx_bufsize - 1);
1607 char_count--;
1608 info->icount.tx++;
1609 }
1610 #endif
1611 tty_wakeup(tty);
1612 ztxdone:
1613 /* Update tx_put */
1614 cy_writel(&buf_ctrl->tx_put, tx_put);
1615 }
1616 }
1617
1618 static void cyz_handle_cmd(struct cyclades_card *cinfo)
1619 {
1620 struct tty_struct *tty;
1621 struct cyclades_port *info;
1622 static struct FIRM_ID __iomem *firm_id;
1623 static struct ZFW_CTRL __iomem *zfw_ctrl;
1624 static struct BOARD_CTRL __iomem *board_ctrl;
1625 static struct CH_CTRL __iomem *ch_ctrl;
1626 static struct BUF_CTRL __iomem *buf_ctrl;
1627 __u32 channel;
1628 __u8 cmd;
1629 __u32 param;
1630 __u32 hw_ver, fw_ver;
1631 int special_count;
1632 int delta_count;
1633
1634 firm_id = cinfo->base_addr + ID_ADDRESS;
1635 zfw_ctrl = cinfo->base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
1636 board_ctrl = &zfw_ctrl->board_ctrl;
1637 fw_ver = readl(&board_ctrl->fw_version);
1638 hw_ver = readl(&((struct RUNTIME_9060 __iomem *)(cinfo->ctl_addr))->
1639 mail_box_0);
1640
1641 while (cyz_fetch_msg(cinfo, &channel, &cmd, &param) == 1) {
1642 special_count = 0;
1643 delta_count = 0;
1644 info = &cinfo->ports[channel];
1645 tty = info->tty;
1646 if (tty == NULL)
1647 continue;
1648
1649 ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]);
1650 buf_ctrl = &(zfw_ctrl->buf_ctrl[channel]);
1651
1652 switch (cmd) {
1653 case C_CM_PR_ERROR:
1654 tty_insert_flip_char(tty, 0, TTY_PARITY);
1655 info->icount.rx++;
1656 special_count++;
1657 break;
1658 case C_CM_FR_ERROR:
1659 tty_insert_flip_char(tty, 0, TTY_FRAME);
1660 info->icount.rx++;
1661 special_count++;
1662 break;
1663 case C_CM_RXBRK:
1664 tty_insert_flip_char(tty, 0, TTY_BREAK);
1665 info->icount.rx++;
1666 special_count++;
1667 break;
1668 case C_CM_MDCD:
1669 info->icount.dcd++;
1670 delta_count++;
1671 if (info->flags & ASYNC_CHECK_CD) {
1672 if ((fw_ver > 241 ? ((u_long) param) :
1673 readl(&ch_ctrl->rs_status)) &
1674 C_RS_DCD) {
1675 wake_up_interruptible(&info->open_wait);
1676 } else {
1677 tty_hangup(info->tty);
1678 wake_up_interruptible(&info->open_wait);
1679 info->flags &= ~ASYNC_NORMAL_ACTIVE;
1680 }
1681 }
1682 break;
1683 case C_CM_MCTS:
1684 info->icount.cts++;
1685 delta_count++;
1686 break;
1687 case C_CM_MRI:
1688 info->icount.rng++;
1689 delta_count++;
1690 break;
1691 case C_CM_MDSR:
1692 info->icount.dsr++;
1693 delta_count++;
1694 break;
1695 #ifdef Z_WAKE
1696 case C_CM_IOCTLW:
1697 complete(&info->shutdown_wait);
1698 break;
1699 #endif
1700 #ifdef CONFIG_CYZ_INTR
1701 case C_CM_RXHIWM:
1702 case C_CM_RXNNDT:
1703 case C_CM_INTBACK2:
1704 /* Reception Interrupt */
1705 #ifdef CY_DEBUG_INTERRUPTS
1706 printk(KERN_DEBUG "cyz_interrupt: rcvd intr, card %d, "
1707 "port %ld\n", info->card, channel);
1708 #endif
1709 cyz_handle_rx(info, buf_ctrl);
1710 break;
1711 case C_CM_TXBEMPTY:
1712 case C_CM_TXLOWWM:
1713 case C_CM_INTBACK:
1714 /* Transmission Interrupt */
1715 #ifdef CY_DEBUG_INTERRUPTS
1716 printk(KERN_DEBUG "cyz_interrupt: xmit intr, card %d, "
1717 "port %ld\n", info->card, channel);
1718 #endif
1719 cyz_handle_tx(info, buf_ctrl);
1720 break;
1721 #endif /* CONFIG_CYZ_INTR */
1722 case C_CM_FATAL:
1723 /* should do something with this !!! */
1724 break;
1725 default:
1726 break;
1727 }
1728 if (delta_count)
1729 wake_up_interruptible(&info->delta_msr_wait);
1730 if (special_count)
1731 tty_schedule_flip(tty);
1732 }
1733 }
1734
1735 #ifdef CONFIG_CYZ_INTR
1736 static irqreturn_t cyz_interrupt(int irq, void *dev_id)
1737 {
1738 struct cyclades_card *cinfo = dev_id;
1739
1740 if (unlikely(cinfo == NULL)) {
1741 #ifdef CY_DEBUG_INTERRUPTS
1742 printk(KERN_DEBUG "cyz_interrupt: spurious interrupt %d\n",
1743 irq);
1744 #endif
1745 return IRQ_NONE; /* spurious interrupt */
1746 }
1747
1748 if (unlikely(!ISZLOADED(*cinfo))) {
1749 #ifdef CY_DEBUG_INTERRUPTS
1750 printk(KERN_DEBUG "cyz_interrupt: board not yet loaded "
1751 "(IRQ%d).\n", irq);
1752 #endif
1753 return IRQ_NONE;
1754 }
1755
1756 /* Handle the interrupts */
1757 cyz_handle_cmd(cinfo);
1758
1759 return IRQ_HANDLED;
1760 } /* cyz_interrupt */
1761
1762 static void cyz_rx_restart(unsigned long arg)
1763 {
1764 struct cyclades_port *info = (struct cyclades_port *)arg;
1765 struct cyclades_card *card = info->card;
1766 int retval;
1767 __u32 channel = info->line - card->first_line;
1768 unsigned long flags;
1769
1770 spin_lock_irqsave(&card->card_lock, flags);
1771 retval = cyz_issue_cmd(card, channel, C_CM_INTBACK2, 0L);
1772 if (retval != 0) {
1773 printk(KERN_ERR "cyc:cyz_rx_restart retval on ttyC%d was %x\n",
1774 info->line, retval);
1775 }
1776 spin_unlock_irqrestore(&card->card_lock, flags);
1777 }
1778
1779 #else /* CONFIG_CYZ_INTR */
1780
1781 static void cyz_poll(unsigned long arg)
1782 {
1783 struct cyclades_card *cinfo;
1784 struct cyclades_port *info;
1785 struct tty_struct *tty;
1786 struct FIRM_ID __iomem *firm_id;
1787 struct ZFW_CTRL __iomem *zfw_ctrl;
1788 struct BOARD_CTRL __iomem *board_ctrl;
1789 struct BUF_CTRL __iomem *buf_ctrl;
1790 unsigned long expires = jiffies + HZ;
1791 unsigned int port, card;
1792
1793 for (card = 0; card < NR_CARDS; card++) {
1794 cinfo = &cy_card[card];
1795
1796 if (!IS_CYC_Z(*cinfo))
1797 continue;
1798 if (!ISZLOADED(*cinfo))
1799 continue;
1800
1801 firm_id = cinfo->base_addr + ID_ADDRESS;
1802 zfw_ctrl = cinfo->base_addr +
1803 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
1804 board_ctrl = &(zfw_ctrl->board_ctrl);
1805
1806 /* Skip first polling cycle to avoid racing conditions with the FW */
1807 if (!cinfo->intr_enabled) {
1808 cinfo->nports = (int)readl(&board_ctrl->n_channel);
1809 cinfo->intr_enabled = 1;
1810 continue;
1811 }
1812
1813 cyz_handle_cmd(cinfo);
1814
1815 for (port = 0; port < cinfo->nports; port++) {
1816 info = &cinfo->ports[port];
1817 tty = info->tty;
1818 buf_ctrl = &(zfw_ctrl->buf_ctrl[port]);
1819
1820 if (!info->throttle)
1821 cyz_handle_rx(info, buf_ctrl);
1822 cyz_handle_tx(info, buf_ctrl);
1823 }
1824 /* poll every 'cyz_polling_cycle' period */
1825 expires = jiffies + cyz_polling_cycle;
1826 }
1827 mod_timer(&cyz_timerlist, expires);
1828 } /* cyz_poll */
1829
1830 #endif /* CONFIG_CYZ_INTR */
1831
1832 /********** End of block of Cyclades-Z specific code *********/
1833 /***********************************************************/
1834
1835 /* This is called whenever a port becomes active;
1836 interrupts are enabled and DTR & RTS are turned on.
1837 */
1838 static int startup(struct cyclades_port *info)
1839 {
1840 struct cyclades_card *card;
1841 unsigned long flags;
1842 int retval = 0;
1843 void __iomem *base_addr;
1844 int chip, channel, index;
1845 unsigned long page;
1846
1847 card = info->card;
1848 channel = info->line - card->first_line;
1849
1850 page = get_zeroed_page(GFP_KERNEL);
1851 if (!page)
1852 return -ENOMEM;
1853
1854 spin_lock_irqsave(&card->card_lock, flags);
1855
1856 if (info->flags & ASYNC_INITIALIZED) {
1857 free_page(page);
1858 goto errout;
1859 }
1860
1861 if (!info->type) {
1862 if (info->tty)
1863 set_bit(TTY_IO_ERROR, &info->tty->flags);
1864 free_page(page);
1865 goto errout;
1866 }
1867
1868 if (info->xmit_buf)
1869 free_page(page);
1870 else
1871 info->xmit_buf = (unsigned char *)page;
1872
1873 spin_unlock_irqrestore(&card->card_lock, flags);
1874
1875 set_line_char(info);
1876
1877 if (!IS_CYC_Z(*card)) {
1878 chip = channel >> 2;
1879 channel &= 0x03;
1880 index = card->bus_index;
1881 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
1882
1883 #ifdef CY_DEBUG_OPEN
1884 printk(KERN_DEBUG "cyc startup card %d, chip %d, channel %d, "
1885 "base_addr %p\n",
1886 card, chip, channel, base_addr);
1887 #endif
1888 spin_lock_irqsave(&card->card_lock, flags);
1889
1890 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
1891
1892 cy_writeb(base_addr + (CyRTPR << index),
1893 (info->default_timeout ? info->default_timeout : 0x02));
1894 /* 10ms rx timeout */
1895
1896 cyy_issue_cmd(base_addr, CyCHAN_CTL | CyENB_RCVR | CyENB_XMTR,
1897 index);
1898
1899 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
1900 cy_writeb(base_addr + (CyMSVR1 << index), CyRTS);
1901 cy_writeb(base_addr + (CyMSVR2 << index), CyDTR);
1902
1903 #ifdef CY_DEBUG_DTR
1904 printk(KERN_DEBUG "cyc:startup raising DTR\n");
1905 printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
1906 readb(base_addr + (CyMSVR1 << index)),
1907 readb(base_addr + (CyMSVR2 << index)));
1908 #endif
1909
1910 cy_writeb(base_addr + (CySRER << index),
1911 readb(base_addr + (CySRER << index)) | CyRxData);
1912 info->flags |= ASYNC_INITIALIZED;
1913
1914 if (info->tty)
1915 clear_bit(TTY_IO_ERROR, &info->tty->flags);
1916 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
1917 info->breakon = info->breakoff = 0;
1918 memset((char *)&info->idle_stats, 0, sizeof(info->idle_stats));
1919 info->idle_stats.in_use =
1920 info->idle_stats.recv_idle =
1921 info->idle_stats.xmit_idle = jiffies;
1922
1923 spin_unlock_irqrestore(&card->card_lock, flags);
1924
1925 } else {
1926 struct FIRM_ID __iomem *firm_id;
1927 struct ZFW_CTRL __iomem *zfw_ctrl;
1928 struct BOARD_CTRL __iomem *board_ctrl;
1929 struct CH_CTRL __iomem *ch_ctrl;
1930
1931 base_addr = card->base_addr;
1932
1933 firm_id = base_addr + ID_ADDRESS;
1934 if (!ISZLOADED(*card))
1935 return -ENODEV;
1936
1937 zfw_ctrl = card->base_addr +
1938 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
1939 board_ctrl = &zfw_ctrl->board_ctrl;
1940 ch_ctrl = zfw_ctrl->ch_ctrl;
1941
1942 #ifdef CY_DEBUG_OPEN
1943 printk(KERN_DEBUG "cyc startup Z card %d, channel %d, "
1944 "base_addr %p\n", card, channel, base_addr);
1945 #endif
1946 spin_lock_irqsave(&card->card_lock, flags);
1947
1948 cy_writel(&ch_ctrl[channel].op_mode, C_CH_ENABLE);
1949 #ifdef Z_WAKE
1950 #ifdef CONFIG_CYZ_INTR
1951 cy_writel(&ch_ctrl[channel].intr_enable,
1952 C_IN_TXBEMPTY | C_IN_TXLOWWM | C_IN_RXHIWM |
1953 C_IN_RXNNDT | C_IN_IOCTLW | C_IN_MDCD);
1954 #else
1955 cy_writel(&ch_ctrl[channel].intr_enable,
1956 C_IN_IOCTLW | C_IN_MDCD);
1957 #endif /* CONFIG_CYZ_INTR */
1958 #else
1959 #ifdef CONFIG_CYZ_INTR
1960 cy_writel(&ch_ctrl[channel].intr_enable,
1961 C_IN_TXBEMPTY | C_IN_TXLOWWM | C_IN_RXHIWM |
1962 C_IN_RXNNDT | C_IN_MDCD);
1963 #else
1964 cy_writel(&ch_ctrl[channel].intr_enable, C_IN_MDCD);
1965 #endif /* CONFIG_CYZ_INTR */
1966 #endif /* Z_WAKE */
1967
1968 retval = cyz_issue_cmd(card, channel, C_CM_IOCTL, 0L);
1969 if (retval != 0) {
1970 printk(KERN_ERR "cyc:startup(1) retval on ttyC%d was "
1971 "%x\n", info->line, retval);
1972 }
1973
1974 /* Flush RX buffers before raising DTR and RTS */
1975 retval = cyz_issue_cmd(card, channel, C_CM_FLUSH_RX, 0L);
1976 if (retval != 0) {
1977 printk(KERN_ERR "cyc:startup(2) retval on ttyC%d was "
1978 "%x\n", info->line, retval);
1979 }
1980
1981 /* set timeout !!! */
1982 /* set RTS and DTR !!! */
1983 cy_writel(&ch_ctrl[channel].rs_control,
1984 readl(&ch_ctrl[channel].rs_control) | C_RS_RTS |
1985 C_RS_DTR);
1986 retval = cyz_issue_cmd(card, channel, C_CM_IOCTLM, 0L);
1987 if (retval != 0) {
1988 printk(KERN_ERR "cyc:startup(3) retval on ttyC%d was "
1989 "%x\n", info->line, retval);
1990 }
1991 #ifdef CY_DEBUG_DTR
1992 printk(KERN_DEBUG "cyc:startup raising Z DTR\n");
1993 #endif
1994
1995 /* enable send, recv, modem !!! */
1996
1997 info->flags |= ASYNC_INITIALIZED;
1998 if (info->tty)
1999 clear_bit(TTY_IO_ERROR, &info->tty->flags);
2000 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
2001 info->breakon = info->breakoff = 0;
2002 memset((char *)&info->idle_stats, 0, sizeof(info->idle_stats));
2003 info->idle_stats.in_use =
2004 info->idle_stats.recv_idle =
2005 info->idle_stats.xmit_idle = jiffies;
2006
2007 spin_unlock_irqrestore(&card->card_lock, flags);
2008 }
2009
2010 #ifdef CY_DEBUG_OPEN
2011 printk(KERN_DEBUG "cyc startup done\n");
2012 #endif
2013 return 0;
2014
2015 errout:
2016 spin_unlock_irqrestore(&card->card_lock, flags);
2017 return retval;
2018 } /* startup */
2019
2020 static void start_xmit(struct cyclades_port *info)
2021 {
2022 struct cyclades_card *card;
2023 unsigned long flags;
2024 void __iomem *base_addr;
2025 int chip, channel, index;
2026
2027 card = info->card;
2028 channel = info->line - card->first_line;
2029 if (!IS_CYC_Z(*card)) {
2030 chip = channel >> 2;
2031 channel &= 0x03;
2032 index = card->bus_index;
2033 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
2034
2035 spin_lock_irqsave(&card->card_lock, flags);
2036 cy_writeb(base_addr + (CyCAR << index), channel);
2037 cy_writeb(base_addr + (CySRER << index),
2038 readb(base_addr + (CySRER << index)) | CyTxRdy);
2039 spin_unlock_irqrestore(&card->card_lock, flags);
2040 } else {
2041 #ifdef CONFIG_CYZ_INTR
2042 int retval;
2043
2044 spin_lock_irqsave(&card->card_lock, flags);
2045 retval = cyz_issue_cmd(card, channel, C_CM_INTBACK, 0L);
2046 if (retval != 0) {
2047 printk(KERN_ERR "cyc:start_xmit retval on ttyC%d was "
2048 "%x\n", info->line, retval);
2049 }
2050 spin_unlock_irqrestore(&card->card_lock, flags);
2051 #else /* CONFIG_CYZ_INTR */
2052 /* Don't have to do anything at this time */
2053 #endif /* CONFIG_CYZ_INTR */
2054 }
2055 } /* start_xmit */
2056
2057 /*
2058 * This routine shuts down a serial port; interrupts are disabled,
2059 * and DTR is dropped if the hangup on close termio flag is on.
2060 */
2061 static void shutdown(struct cyclades_port *info)
2062 {
2063 struct cyclades_card *card;
2064 unsigned long flags;
2065 void __iomem *base_addr;
2066 int chip, channel, index;
2067
2068 if (!(info->flags & ASYNC_INITIALIZED))
2069 return;
2070
2071 card = info->card;
2072 channel = info->line - card->first_line;
2073 if (!IS_CYC_Z(*card)) {
2074 chip = channel >> 2;
2075 channel &= 0x03;
2076 index = card->bus_index;
2077 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
2078
2079 #ifdef CY_DEBUG_OPEN
2080 printk(KERN_DEBUG "cyc shutdown Y card %d, chip %d, "
2081 "channel %d, base_addr %p\n",
2082 card, chip, channel, base_addr);
2083 #endif
2084
2085 spin_lock_irqsave(&card->card_lock, flags);
2086
2087 /* Clear delta_msr_wait queue to avoid mem leaks. */
2088 wake_up_interruptible(&info->delta_msr_wait);
2089
2090 if (info->xmit_buf) {
2091 unsigned char *temp;
2092 temp = info->xmit_buf;
2093 info->xmit_buf = NULL;
2094 free_page((unsigned long)temp);
2095 }
2096 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
2097 if (!info->tty || (info->tty->termios->c_cflag & HUPCL)) {
2098 cy_writeb(base_addr + (CyMSVR1 << index), ~CyRTS);
2099 cy_writeb(base_addr + (CyMSVR2 << index), ~CyDTR);
2100 #ifdef CY_DEBUG_DTR
2101 printk(KERN_DEBUG "cyc shutdown dropping DTR\n");
2102 printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
2103 readb(base_addr + (CyMSVR1 << index)),
2104 readb(base_addr + (CyMSVR2 << index)));
2105 #endif
2106 }
2107 cyy_issue_cmd(base_addr, CyCHAN_CTL | CyDIS_RCVR, index);
2108 /* it may be appropriate to clear _XMIT at
2109 some later date (after testing)!!! */
2110
2111 if (info->tty)
2112 set_bit(TTY_IO_ERROR, &info->tty->flags);
2113 info->flags &= ~ASYNC_INITIALIZED;
2114 spin_unlock_irqrestore(&card->card_lock, flags);
2115 } else {
2116 struct FIRM_ID __iomem *firm_id;
2117 struct ZFW_CTRL __iomem *zfw_ctrl;
2118 struct BOARD_CTRL __iomem *board_ctrl;
2119 struct CH_CTRL __iomem *ch_ctrl;
2120 int retval;
2121
2122 base_addr = card->base_addr;
2123 #ifdef CY_DEBUG_OPEN
2124 printk(KERN_DEBUG "cyc shutdown Z card %d, channel %d, "
2125 "base_addr %p\n", card, channel, base_addr);
2126 #endif
2127
2128 firm_id = base_addr + ID_ADDRESS;
2129 if (!ISZLOADED(*card))
2130 return;
2131
2132 zfw_ctrl = card->base_addr +
2133 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
2134 board_ctrl = &zfw_ctrl->board_ctrl;
2135 ch_ctrl = zfw_ctrl->ch_ctrl;
2136
2137 spin_lock_irqsave(&card->card_lock, flags);
2138
2139 if (info->xmit_buf) {
2140 unsigned char *temp;
2141 temp = info->xmit_buf;
2142 info->xmit_buf = NULL;
2143 free_page((unsigned long)temp);
2144 }
2145
2146 if (!info->tty || (info->tty->termios->c_cflag & HUPCL)) {
2147 cy_writel(&ch_ctrl[channel].rs_control,
2148 (__u32)(readl(&ch_ctrl[channel].rs_control) &
2149 ~(C_RS_RTS | C_RS_DTR)));
2150 retval = cyz_issue_cmd(info->card, channel,
2151 C_CM_IOCTLM, 0L);
2152 if (retval != 0) {
2153 printk(KERN_ERR"cyc:shutdown retval on ttyC%d "
2154 "was %x\n", info->line, retval);
2155 }
2156 #ifdef CY_DEBUG_DTR
2157 printk(KERN_DEBUG "cyc:shutdown dropping Z DTR\n");
2158 #endif
2159 }
2160
2161 if (info->tty)
2162 set_bit(TTY_IO_ERROR, &info->tty->flags);
2163 info->flags &= ~ASYNC_INITIALIZED;
2164
2165 spin_unlock_irqrestore(&card->card_lock, flags);
2166 }
2167
2168 #ifdef CY_DEBUG_OPEN
2169 printk(KERN_DEBUG "cyc shutdown done\n");
2170 #endif
2171 } /* shutdown */
2172
2173 /*
2174 * ------------------------------------------------------------
2175 * cy_open() and friends
2176 * ------------------------------------------------------------
2177 */
2178
2179 static int
2180 block_til_ready(struct tty_struct *tty, struct file *filp,
2181 struct cyclades_port *info)
2182 {
2183 DECLARE_WAITQUEUE(wait, current);
2184 struct cyclades_card *cinfo;
2185 unsigned long flags;
2186 int chip, channel, index;
2187 int retval;
2188 void __iomem *base_addr;
2189
2190 cinfo = info->card;
2191 channel = info->line - cinfo->first_line;
2192
2193 /*
2194 * If the device is in the middle of being closed, then block
2195 * until it's done, and then try again.
2196 */
2197 if (tty_hung_up_p(filp) || (info->flags & ASYNC_CLOSING)) {
2198 wait_event_interruptible(info->close_wait,
2199 !(info->flags & ASYNC_CLOSING));
2200 return (info->flags & ASYNC_HUP_NOTIFY) ? -EAGAIN: -ERESTARTSYS;
2201 }
2202
2203 /*
2204 * If non-blocking mode is set, then make the check up front
2205 * and then exit.
2206 */
2207 if ((filp->f_flags & O_NONBLOCK) ||
2208 (tty->flags & (1 << TTY_IO_ERROR))) {
2209 info->flags |= ASYNC_NORMAL_ACTIVE;
2210 return 0;
2211 }
2212
2213 /*
2214 * Block waiting for the carrier detect and the line to become
2215 * free (i.e., not in use by the callout). While we are in
2216 * this loop, info->count is dropped by one, so that
2217 * cy_close() knows when to free things. We restore it upon
2218 * exit, either normal or abnormal.
2219 */
2220 retval = 0;
2221 add_wait_queue(&info->open_wait, &wait);
2222 #ifdef CY_DEBUG_OPEN
2223 printk(KERN_DEBUG "cyc block_til_ready before block: ttyC%d, "
2224 "count = %d\n", info->line, info->count);
2225 #endif
2226 spin_lock_irqsave(&cinfo->card_lock, flags);
2227 if (!tty_hung_up_p(filp))
2228 info->count--;
2229 spin_unlock_irqrestore(&cinfo->card_lock, flags);
2230 #ifdef CY_DEBUG_COUNT
2231 printk(KERN_DEBUG "cyc block_til_ready: (%d): decrementing count to "
2232 "%d\n", current->pid, info->count);
2233 #endif
2234 info->blocked_open++;
2235
2236 if (!IS_CYC_Z(*cinfo)) {
2237 chip = channel >> 2;
2238 channel &= 0x03;
2239 index = cinfo->bus_index;
2240 base_addr = cinfo->base_addr + (cy_chip_offset[chip] << index);
2241
2242 while (1) {
2243 spin_lock_irqsave(&cinfo->card_lock, flags);
2244 if ((tty->termios->c_cflag & CBAUD)) {
2245 cy_writeb(base_addr + (CyCAR << index),
2246 (u_char) channel);
2247 cy_writeb(base_addr + (CyMSVR1 << index),
2248 CyRTS);
2249 cy_writeb(base_addr + (CyMSVR2 << index),
2250 CyDTR);
2251 #ifdef CY_DEBUG_DTR
2252 printk(KERN_DEBUG "cyc:block_til_ready raising "
2253 "DTR\n");
2254 printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
2255 readb(base_addr + (CyMSVR1 << index)),
2256 readb(base_addr + (CyMSVR2 << index)));
2257 #endif
2258 }
2259 spin_unlock_irqrestore(&cinfo->card_lock, flags);
2260
2261 set_current_state(TASK_INTERRUPTIBLE);
2262 if (tty_hung_up_p(filp) ||
2263 !(info->flags & ASYNC_INITIALIZED)) {
2264 retval = ((info->flags & ASYNC_HUP_NOTIFY) ?
2265 -EAGAIN : -ERESTARTSYS);
2266 break;
2267 }
2268
2269 spin_lock_irqsave(&cinfo->card_lock, flags);
2270 cy_writeb(base_addr + (CyCAR << index),
2271 (u_char) channel);
2272 if (!(info->flags & ASYNC_CLOSING) && (C_CLOCAL(tty) ||
2273 (readb(base_addr +
2274 (CyMSVR1 << index)) & CyDCD))) {
2275 spin_unlock_irqrestore(&cinfo->card_lock, flags);
2276 break;
2277 }
2278 spin_unlock_irqrestore(&cinfo->card_lock, flags);
2279
2280 if (signal_pending(current)) {
2281 retval = -ERESTARTSYS;
2282 break;
2283 }
2284 #ifdef CY_DEBUG_OPEN
2285 printk(KERN_DEBUG "cyc block_til_ready blocking: "
2286 "ttyC%d, count = %d\n",
2287 info->line, info->count);
2288 #endif
2289 schedule();
2290 }
2291 } else {
2292 struct FIRM_ID __iomem *firm_id;
2293 struct ZFW_CTRL __iomem *zfw_ctrl;
2294 struct BOARD_CTRL __iomem *board_ctrl;
2295 struct CH_CTRL __iomem *ch_ctrl;
2296
2297 base_addr = cinfo->base_addr;
2298 firm_id = base_addr + ID_ADDRESS;
2299 if (!ISZLOADED(*cinfo)) {
2300 __set_current_state(TASK_RUNNING);
2301 remove_wait_queue(&info->open_wait, &wait);
2302 return -EINVAL;
2303 }
2304
2305 zfw_ctrl = base_addr + (readl(&firm_id->zfwctrl_addr)
2306 & 0xfffff);
2307 board_ctrl = &zfw_ctrl->board_ctrl;
2308 ch_ctrl = zfw_ctrl->ch_ctrl;
2309
2310 while (1) {
2311 if ((tty->termios->c_cflag & CBAUD)) {
2312 cy_writel(&ch_ctrl[channel].rs_control,
2313 readl(&ch_ctrl[channel].rs_control) |
2314 C_RS_RTS | C_RS_DTR);
2315 retval = cyz_issue_cmd(cinfo,
2316 channel, C_CM_IOCTLM, 0L);
2317 if (retval != 0) {
2318 printk(KERN_ERR "cyc:block_til_ready "
2319 "retval on ttyC%d was %x\n",
2320 info->line, retval);
2321 }
2322 #ifdef CY_DEBUG_DTR
2323 printk(KERN_DEBUG "cyc:block_til_ready raising "
2324 "Z DTR\n");
2325 #endif
2326 }
2327
2328 set_current_state(TASK_INTERRUPTIBLE);
2329 if (tty_hung_up_p(filp) ||
2330 !(info->flags & ASYNC_INITIALIZED)) {
2331 retval = ((info->flags & ASYNC_HUP_NOTIFY) ?
2332 -EAGAIN : -ERESTARTSYS);
2333 break;
2334 }
2335 if (!(info->flags & ASYNC_CLOSING) && (C_CLOCAL(tty) ||
2336 (readl(&ch_ctrl[channel].rs_status) &
2337 C_RS_DCD))) {
2338 break;
2339 }
2340 if (signal_pending(current)) {
2341 retval = -ERESTARTSYS;
2342 break;
2343 }
2344 #ifdef CY_DEBUG_OPEN
2345 printk(KERN_DEBUG "cyc block_til_ready blocking: "
2346 "ttyC%d, count = %d\n",
2347 info->line, info->count);
2348 #endif
2349 schedule();
2350 }
2351 }
2352 __set_current_state(TASK_RUNNING);
2353 remove_wait_queue(&info->open_wait, &wait);
2354 if (!tty_hung_up_p(filp)) {
2355 info->count++;
2356 #ifdef CY_DEBUG_COUNT
2357 printk(KERN_DEBUG "cyc:block_til_ready (%d): incrementing "
2358 "count to %d\n", current->pid, info->count);
2359 #endif
2360 }
2361 info->blocked_open--;
2362 #ifdef CY_DEBUG_OPEN
2363 printk(KERN_DEBUG "cyc:block_til_ready after blocking: ttyC%d, "
2364 "count = %d\n", info->line, info->count);
2365 #endif
2366 if (retval)
2367 return retval;
2368 info->flags |= ASYNC_NORMAL_ACTIVE;
2369 return 0;
2370 } /* block_til_ready */
2371
2372 /*
2373 * This routine is called whenever a serial port is opened. It
2374 * performs the serial-specific initialization for the tty structure.
2375 */
2376 static int cy_open(struct tty_struct *tty, struct file *filp)
2377 {
2378 struct cyclades_port *info;
2379 unsigned int i, line;
2380 int retval;
2381
2382 line = tty->index;
2383 if (tty->index < 0 || NR_PORTS <= line)
2384 return -ENODEV;
2385
2386 for (i = 0; i < NR_CARDS; i++)
2387 if (line < cy_card[i].first_line + cy_card[i].nports &&
2388 line >= cy_card[i].first_line)
2389 break;
2390 if (i >= NR_CARDS)
2391 return -ENODEV;
2392 info = &cy_card[i].ports[line - cy_card[i].first_line];
2393 if (info->line < 0)
2394 return -ENODEV;
2395
2396 /* If the card's firmware hasn't been loaded,
2397 treat it as absent from the system. This
2398 will make the user pay attention.
2399 */
2400 if (IS_CYC_Z(*info->card)) {
2401 struct cyclades_card *cinfo = info->card;
2402 struct FIRM_ID __iomem *firm_id = cinfo->base_addr + ID_ADDRESS;
2403
2404 if (!ISZLOADED(*cinfo)) {
2405 if (((ZE_V1 == readl(&((struct RUNTIME_9060 __iomem *)
2406 (cinfo->ctl_addr))->mail_box_0)) &&
2407 Z_FPGA_CHECK(*cinfo)) &&
2408 (ZFIRM_HLT == readl(
2409 &firm_id->signature))) {
2410 printk(KERN_ERR "cyc:Cyclades-Z Error: you "
2411 "need an external power supply for "
2412 "this number of ports.\nFirmware "
2413 "halted.\n");
2414 } else {
2415 printk(KERN_ERR "cyc:Cyclades-Z firmware not "
2416 "yet loaded\n");
2417 }
2418 return -ENODEV;
2419 }
2420 #ifdef CONFIG_CYZ_INTR
2421 else {
2422 /* In case this Z board is operating in interrupt mode, its
2423 interrupts should be enabled as soon as the first open
2424 happens to one of its ports. */
2425 if (!cinfo->intr_enabled) {
2426 struct ZFW_CTRL __iomem *zfw_ctrl;
2427 struct BOARD_CTRL __iomem *board_ctrl;
2428
2429 zfw_ctrl = cinfo->base_addr +
2430 (readl(&firm_id->zfwctrl_addr) &
2431 0xfffff);
2432
2433 board_ctrl = &zfw_ctrl->board_ctrl;
2434
2435 /* Enable interrupts on the PLX chip */
2436 cy_writew(cinfo->ctl_addr + 0x68,
2437 readw(cinfo->ctl_addr + 0x68) | 0x0900);
2438 /* Enable interrupts on the FW */
2439 retval = cyz_issue_cmd(cinfo, 0,
2440 C_CM_IRQ_ENBL, 0L);
2441 if (retval != 0) {
2442 printk(KERN_ERR "cyc:IRQ enable retval "
2443 "was %x\n", retval);
2444 }
2445 cinfo->nports =
2446 (int)readl(&board_ctrl->n_channel);
2447 cinfo->intr_enabled = 1;
2448 }
2449 }
2450 #endif /* CONFIG_CYZ_INTR */
2451 /* Make sure this Z port really exists in hardware */
2452 if (info->line > (cinfo->first_line + cinfo->nports - 1))
2453 return -ENODEV;
2454 }
2455 #ifdef CY_DEBUG_OTHER
2456 printk(KERN_DEBUG "cyc:cy_open ttyC%d\n", info->line);
2457 #endif
2458 tty->driver_data = info;
2459 info->tty = tty;
2460 if (serial_paranoia_check(info, tty->name, "cy_open"))
2461 return -ENODEV;
2462
2463 #ifdef CY_DEBUG_OPEN
2464 printk(KERN_DEBUG "cyc:cy_open ttyC%d, count = %d\n", info->line,
2465 info->count);
2466 #endif
2467 info->count++;
2468 #ifdef CY_DEBUG_COUNT
2469 printk(KERN_DEBUG "cyc:cy_open (%d): incrementing count to %d\n",
2470 current->pid, info->count);
2471 #endif
2472
2473 /*
2474 * If the port is the middle of closing, bail out now
2475 */
2476 if (tty_hung_up_p(filp) || (info->flags & ASYNC_CLOSING)) {
2477 wait_event_interruptible(info->close_wait,
2478 !(info->flags & ASYNC_CLOSING));
2479 return (info->flags & ASYNC_HUP_NOTIFY) ? -EAGAIN: -ERESTARTSYS;
2480 }
2481
2482 /*
2483 * Start up serial port
2484 */
2485 retval = startup(info);
2486 if (retval)
2487 return retval;
2488
2489 retval = block_til_ready(tty, filp, info);
2490 if (retval) {
2491 #ifdef CY_DEBUG_OPEN
2492 printk(KERN_DEBUG "cyc:cy_open returning after block_til_ready "
2493 "with %d\n", retval);
2494 #endif
2495 return retval;
2496 }
2497
2498 info->throttle = 0;
2499
2500 #ifdef CY_DEBUG_OPEN
2501 printk(KERN_DEBUG "cyc:cy_open done\n");
2502 #endif
2503 return 0;
2504 } /* cy_open */
2505
2506 /*
2507 * cy_wait_until_sent() --- wait until the transmitter is empty
2508 */
2509 static void cy_wait_until_sent(struct tty_struct *tty, int timeout)
2510 {
2511 struct cyclades_card *card;
2512 struct cyclades_port *info = tty->driver_data;
2513 void __iomem *base_addr;
2514 int chip, channel, index;
2515 unsigned long orig_jiffies;
2516 int char_time;
2517
2518 if (serial_paranoia_check(info, tty->name, "cy_wait_until_sent"))
2519 return;
2520
2521 if (info->xmit_fifo_size == 0)
2522 return; /* Just in case.... */
2523
2524 orig_jiffies = jiffies;
2525 lock_kernel();
2526 /*
2527 * Set the check interval to be 1/5 of the estimated time to
2528 * send a single character, and make it at least 1. The check
2529 * interval should also be less than the timeout.
2530 *
2531 * Note: we have to use pretty tight timings here to satisfy
2532 * the NIST-PCTS.
2533 */
2534 char_time = (info->timeout - HZ / 50) / info->xmit_fifo_size;
2535 char_time = char_time / 5;
2536 if (char_time <= 0)
2537 char_time = 1;
2538 if (timeout < 0)
2539 timeout = 0;
2540 if (timeout)
2541 char_time = min(char_time, timeout);
2542 /*
2543 * If the transmitter hasn't cleared in twice the approximate
2544 * amount of time to send the entire FIFO, it probably won't
2545 * ever clear. This assumes the UART isn't doing flow
2546 * control, which is currently the case. Hence, if it ever
2547 * takes longer than info->timeout, this is probably due to a
2548 * UART bug of some kind. So, we clamp the timeout parameter at
2549 * 2*info->timeout.
2550 */
2551 if (!timeout || timeout > 2 * info->timeout)
2552 timeout = 2 * info->timeout;
2553 #ifdef CY_DEBUG_WAIT_UNTIL_SENT
2554 printk(KERN_DEBUG "In cy_wait_until_sent(%d) check=%d, jiff=%lu...",
2555 timeout, char_time, jiffies);
2556 #endif
2557 card = info->card;
2558 channel = (info->line) - (card->first_line);
2559 if (!IS_CYC_Z(*card)) {
2560 chip = channel >> 2;
2561 channel &= 0x03;
2562 index = card->bus_index;
2563 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
2564 while (readb(base_addr + (CySRER << index)) & CyTxRdy) {
2565 #ifdef CY_DEBUG_WAIT_UNTIL_SENT
2566 printk(KERN_DEBUG "Not clean (jiff=%lu)...", jiffies);
2567 #endif
2568 if (msleep_interruptible(jiffies_to_msecs(char_time)))
2569 break;
2570 if (timeout && time_after(jiffies, orig_jiffies +
2571 timeout))
2572 break;
2573 }
2574 }
2575 /* Run one more char cycle */
2576 msleep_interruptible(jiffies_to_msecs(char_time * 5));
2577 unlock_kernel();
2578 #ifdef CY_DEBUG_WAIT_UNTIL_SENT
2579 printk(KERN_DEBUG "Clean (jiff=%lu)...done\n", jiffies);
2580 #endif
2581 }
2582
2583 static void cy_flush_buffer(struct tty_struct *tty)
2584 {
2585 struct cyclades_port *info = tty->driver_data;
2586 struct cyclades_card *card;
2587 int channel, retval;
2588 unsigned long flags;
2589
2590 #ifdef CY_DEBUG_IO
2591 printk(KERN_DEBUG "cyc:cy_flush_buffer ttyC%d\n", info->line);
2592 #endif
2593
2594 if (serial_paranoia_check(info, tty->name, "cy_flush_buffer"))
2595 return;
2596
2597 card = info->card;
2598 channel = info->line - card->first_line;
2599
2600 spin_lock_irqsave(&card->card_lock, flags);
2601 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
2602 spin_unlock_irqrestore(&card->card_lock, flags);
2603
2604 if (IS_CYC_Z(*card)) { /* If it is a Z card, flush the on-board
2605 buffers as well */
2606 spin_lock_irqsave(&card->card_lock, flags);
2607 retval = cyz_issue_cmd(card, channel, C_CM_FLUSH_TX, 0L);
2608 if (retval != 0) {
2609 printk(KERN_ERR "cyc: flush_buffer retval on ttyC%d "
2610 "was %x\n", info->line, retval);
2611 }
2612 spin_unlock_irqrestore(&card->card_lock, flags);
2613 }
2614 tty_wakeup(tty);
2615 } /* cy_flush_buffer */
2616
2617
2618 /*
2619 * This routine is called when a particular tty device is closed.
2620 */
2621 static void cy_close(struct tty_struct *tty, struct file *filp)
2622 {
2623 struct cyclades_port *info = tty->driver_data;
2624 struct cyclades_card *card;
2625 unsigned long flags;
2626
2627 #ifdef CY_DEBUG_OTHER
2628 printk(KERN_DEBUG "cyc:cy_close ttyC%d\n", info->line);
2629 #endif
2630
2631 if (!info || serial_paranoia_check(info, tty->name, "cy_close"))
2632 return;
2633
2634 card = info->card;
2635
2636 spin_lock_irqsave(&card->card_lock, flags);
2637 /* If the TTY is being hung up, nothing to do */
2638 if (tty_hung_up_p(filp)) {
2639 spin_unlock_irqrestore(&card->card_lock, flags);
2640 return;
2641 }
2642 #ifdef CY_DEBUG_OPEN
2643 printk(KERN_DEBUG "cyc:cy_close ttyC%d, count = %d\n", info->line,
2644 info->count);
2645 #endif
2646 if ((tty->count == 1) && (info->count != 1)) {
2647 /*
2648 * Uh, oh. tty->count is 1, which means that the tty
2649 * structure will be freed. Info->count should always
2650 * be one in these conditions. If it's greater than
2651 * one, we've got real problems, since it means the
2652 * serial port won't be shutdown.
2653 */
2654 printk(KERN_ERR "cyc:cy_close: bad serial port count; "
2655 "tty->count is 1, info->count is %d\n", info->count);
2656 info->count = 1;
2657 }
2658 #ifdef CY_DEBUG_COUNT
2659 printk(KERN_DEBUG "cyc:cy_close at (%d): decrementing count to %d\n",
2660 current->pid, info->count - 1);
2661 #endif
2662 if (--info->count < 0) {
2663 #ifdef CY_DEBUG_COUNT
2664 printk(KERN_DEBUG "cyc:cyc_close setting count to 0\n");
2665 #endif
2666 info->count = 0;
2667 }
2668 if (info->count) {
2669 spin_unlock_irqrestore(&card->card_lock, flags);
2670 return;
2671 }
2672 info->flags |= ASYNC_CLOSING;
2673
2674 /*
2675 * Now we wait for the transmit buffer to clear; and we notify
2676 * the line discipline to only process XON/XOFF characters.
2677 */
2678 tty->closing = 1;
2679 spin_unlock_irqrestore(&card->card_lock, flags);
2680 if (info->closing_wait != CY_CLOSING_WAIT_NONE)
2681 tty_wait_until_sent(tty, info->closing_wait);
2682
2683 spin_lock_irqsave(&card->card_lock, flags);
2684
2685 if (!IS_CYC_Z(*card)) {
2686 int channel = info->line - card->first_line;
2687 int index = card->bus_index;
2688 void __iomem *base_addr = card->base_addr +
2689 (cy_chip_offset[channel >> 2] << index);
2690 /* Stop accepting input */
2691 channel &= 0x03;
2692 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
2693 cy_writeb(base_addr + (CySRER << index),
2694 readb(base_addr + (CySRER << index)) & ~CyRxData);
2695 if (info->flags & ASYNC_INITIALIZED) {
2696 /* Waiting for on-board buffers to be empty before
2697 closing the port */
2698 spin_unlock_irqrestore(&card->card_lock, flags);
2699 cy_wait_until_sent(tty, info->timeout);
2700 spin_lock_irqsave(&card->card_lock, flags);
2701 }
2702 } else {
2703 #ifdef Z_WAKE
2704 /* Waiting for on-board buffers to be empty before closing
2705 the port */
2706 void __iomem *base_addr = card->base_addr;
2707 struct FIRM_ID __iomem *firm_id = base_addr + ID_ADDRESS;
2708 struct ZFW_CTRL __iomem *zfw_ctrl =
2709 base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
2710 struct CH_CTRL __iomem *ch_ctrl = zfw_ctrl->ch_ctrl;
2711 int channel = info->line - card->first_line;
2712 int retval;
2713
2714 if (readl(&ch_ctrl[channel].flow_status) != C_FS_TXIDLE) {
2715 retval = cyz_issue_cmd(card, channel, C_CM_IOCTLW, 0L);
2716 if (retval != 0) {
2717 printk(KERN_DEBUG "cyc:cy_close retval on "
2718 "ttyC%d was %x\n", info->line, retval);
2719 }
2720 spin_unlock_irqrestore(&card->card_lock, flags);
2721 wait_for_completion_interruptible(&info->shutdown_wait);
2722 spin_lock_irqsave(&card->card_lock, flags);
2723 }
2724 #endif
2725 }
2726
2727 spin_unlock_irqrestore(&card->card_lock, flags);
2728 shutdown(info);
2729 cy_flush_buffer(tty);
2730 tty_ldisc_flush(tty);
2731 spin_lock_irqsave(&card->card_lock, flags);
2732
2733 tty->closing = 0;
2734 info->tty = NULL;
2735 if (info->blocked_open) {
2736 spin_unlock_irqrestore(&card->card_lock, flags);
2737 if (info->close_delay) {
2738 msleep_interruptible(jiffies_to_msecs
2739 (info->close_delay));
2740 }
2741 wake_up_interruptible(&info->open_wait);
2742 spin_lock_irqsave(&card->card_lock, flags);
2743 }
2744 info->flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CLOSING);
2745 wake_up_interruptible(&info->close_wait);
2746
2747 #ifdef CY_DEBUG_OTHER
2748 printk(KERN_DEBUG "cyc:cy_close done\n");
2749 #endif
2750
2751 spin_unlock_irqrestore(&card->card_lock, flags);
2752 } /* cy_close */
2753
2754 /* This routine gets called when tty_write has put something into
2755 * the write_queue. The characters may come from user space or
2756 * kernel space.
2757 *
2758 * This routine will return the number of characters actually
2759 * accepted for writing.
2760 *
2761 * If the port is not already transmitting stuff, start it off by
2762 * enabling interrupts. The interrupt service routine will then
2763 * ensure that the characters are sent.
2764 * If the port is already active, there is no need to kick it.
2765 *
2766 */
2767 static int cy_write(struct tty_struct *tty, const unsigned char *buf, int count)
2768 {
2769 struct cyclades_port *info = tty->driver_data;
2770 unsigned long flags;
2771 int c, ret = 0;
2772
2773 #ifdef CY_DEBUG_IO
2774 printk(KERN_DEBUG "cyc:cy_write ttyC%d\n", info->line);
2775 #endif
2776
2777 if (serial_paranoia_check(info, tty->name, "cy_write"))
2778 return 0;
2779
2780 if (!info->xmit_buf)
2781 return 0;
2782
2783 spin_lock_irqsave(&info->card->card_lock, flags);
2784 while (1) {
2785 c = min(count, (int)(SERIAL_XMIT_SIZE - info->xmit_cnt - 1));
2786 c = min(c, (int)(SERIAL_XMIT_SIZE - info->xmit_head));
2787
2788 if (c <= 0)
2789 break;
2790
2791 memcpy(info->xmit_buf + info->xmit_head, buf, c);
2792 info->xmit_head = (info->xmit_head + c) &
2793 (SERIAL_XMIT_SIZE - 1);
2794 info->xmit_cnt += c;
2795 buf += c;
2796 count -= c;
2797 ret += c;
2798 }
2799 spin_unlock_irqrestore(&info->card->card_lock, flags);
2800
2801 info->idle_stats.xmit_bytes += ret;
2802 info->idle_stats.xmit_idle = jiffies;
2803
2804 if (info->xmit_cnt && !tty->stopped && !tty->hw_stopped)
2805 start_xmit(info);
2806
2807 return ret;
2808 } /* cy_write */
2809
2810 /*
2811 * This routine is called by the kernel to write a single
2812 * character to the tty device. If the kernel uses this routine,
2813 * it must call the flush_chars() routine (if defined) when it is
2814 * done stuffing characters into the driver. If there is no room
2815 * in the queue, the character is ignored.
2816 */
2817 static int cy_put_char(struct tty_struct *tty, unsigned char ch)
2818 {
2819 struct cyclades_port *info = tty->driver_data;
2820 unsigned long flags;
2821
2822 #ifdef CY_DEBUG_IO
2823 printk(KERN_DEBUG "cyc:cy_put_char ttyC%d\n", info->line);
2824 #endif
2825
2826 if (serial_paranoia_check(info, tty->name, "cy_put_char"))
2827 return 0;
2828
2829 if (!info->xmit_buf)
2830 return 0;
2831
2832 spin_lock_irqsave(&info->card->card_lock, flags);
2833 if (info->xmit_cnt >= (int)(SERIAL_XMIT_SIZE - 1)) {
2834 spin_unlock_irqrestore(&info->card->card_lock, flags);
2835 return 0;
2836 }
2837
2838 info->xmit_buf[info->xmit_head++] = ch;
2839 info->xmit_head &= SERIAL_XMIT_SIZE - 1;
2840 info->xmit_cnt++;
2841 info->idle_stats.xmit_bytes++;
2842 info->idle_stats.xmit_idle = jiffies;
2843 spin_unlock_irqrestore(&info->card->card_lock, flags);
2844 return 1;
2845 } /* cy_put_char */
2846
2847 /*
2848 * This routine is called by the kernel after it has written a
2849 * series of characters to the tty device using put_char().
2850 */
2851 static void cy_flush_chars(struct tty_struct *tty)
2852 {
2853 struct cyclades_port *info = tty->driver_data;
2854
2855 #ifdef CY_DEBUG_IO
2856 printk(KERN_DEBUG "cyc:cy_flush_chars ttyC%d\n", info->line);
2857 #endif
2858
2859 if (serial_paranoia_check(info, tty->name, "cy_flush_chars"))
2860 return;
2861
2862 if (info->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped ||
2863 !info->xmit_buf)
2864 return;
2865
2866 start_xmit(info);
2867 } /* cy_flush_chars */
2868
2869 /*
2870 * This routine returns the numbers of characters the tty driver
2871 * will accept for queuing to be written. This number is subject
2872 * to change as output buffers get emptied, or if the output flow
2873 * control is activated.
2874 */
2875 static int cy_write_room(struct tty_struct *tty)
2876 {
2877 struct cyclades_port *info = tty->driver_data;
2878 int ret;
2879
2880 #ifdef CY_DEBUG_IO
2881 printk(KERN_DEBUG "cyc:cy_write_room ttyC%d\n", info->line);
2882 #endif
2883
2884 if (serial_paranoia_check(info, tty->name, "cy_write_room"))
2885 return 0;
2886 ret = SERIAL_XMIT_SIZE - info->xmit_cnt - 1;
2887 if (ret < 0)
2888 ret = 0;
2889 return ret;
2890 } /* cy_write_room */
2891
2892 static int cy_chars_in_buffer(struct tty_struct *tty)
2893 {
2894 struct cyclades_card *card;
2895 struct cyclades_port *info = tty->driver_data;
2896 int channel;
2897
2898 if (serial_paranoia_check(info, tty->name, "cy_chars_in_buffer"))
2899 return 0;
2900
2901 card = info->card;
2902 channel = (info->line) - (card->first_line);
2903
2904 #ifdef Z_EXT_CHARS_IN_BUFFER
2905 if (!IS_CYC_Z(cy_card[card])) {
2906 #endif /* Z_EXT_CHARS_IN_BUFFER */
2907 #ifdef CY_DEBUG_IO
2908 printk(KERN_DEBUG "cyc:cy_chars_in_buffer ttyC%d %d\n",
2909 info->line, info->xmit_cnt);
2910 #endif
2911 return info->xmit_cnt;
2912 #ifdef Z_EXT_CHARS_IN_BUFFER
2913 } else {
2914 static struct FIRM_ID *firm_id;
2915 static struct ZFW_CTRL *zfw_ctrl;
2916 static struct CH_CTRL *ch_ctrl;
2917 static struct BUF_CTRL *buf_ctrl;
2918 int char_count;
2919 __u32 tx_put, tx_get, tx_bufsize;
2920
2921 lock_kernel();
2922 firm_id = card->base_addr + ID_ADDRESS;
2923 zfw_ctrl = card->base_addr +
2924 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
2925 ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]);
2926 buf_ctrl = &(zfw_ctrl->buf_ctrl[channel]);
2927
2928 tx_get = readl(&buf_ctrl->tx_get);
2929 tx_put = readl(&buf_ctrl->tx_put);
2930 tx_bufsize = readl(&buf_ctrl->tx_bufsize);
2931 if (tx_put >= tx_get)
2932 char_count = tx_put - tx_get;
2933 else
2934 char_count = tx_put - tx_get + tx_bufsize;
2935 #ifdef CY_DEBUG_IO
2936 printk(KERN_DEBUG "cyc:cy_chars_in_buffer ttyC%d %d\n",
2937 info->line, info->xmit_cnt + char_count);
2938 #endif
2939 unlock_kernel();
2940 return info->xmit_cnt + char_count;
2941 }
2942 #endif /* Z_EXT_CHARS_IN_BUFFER */
2943 } /* cy_chars_in_buffer */
2944
2945 /*
2946 * ------------------------------------------------------------
2947 * cy_ioctl() and friends
2948 * ------------------------------------------------------------
2949 */
2950
2951 static void cyy_baud_calc(struct cyclades_port *info, __u32 baud)
2952 {
2953 int co, co_val, bpr;
2954 __u32 cy_clock = ((info->chip_rev >= CD1400_REV_J) ? 60000000 :
2955 25000000);
2956
2957 if (baud == 0) {
2958 info->tbpr = info->tco = info->rbpr = info->rco = 0;
2959 return;
2960 }
2961
2962 /* determine which prescaler to use */
2963 for (co = 4, co_val = 2048; co; co--, co_val >>= 2) {
2964 if (cy_clock / co_val / baud > 63)
2965 break;
2966 }
2967
2968 bpr = (cy_clock / co_val * 2 / baud + 1) / 2;
2969 if (bpr > 255)
2970 bpr = 255;
2971
2972 info->tbpr = info->rbpr = bpr;
2973 info->tco = info->rco = co;
2974 }
2975
2976 /*
2977 * This routine finds or computes the various line characteristics.
2978 * It used to be called config_setup
2979 */
2980 static void set_line_char(struct cyclades_port *info)
2981 {
2982 struct cyclades_card *card;
2983 unsigned long flags;
2984 void __iomem *base_addr;
2985 int chip, channel, index;
2986 unsigned cflag, iflag;
2987 unsigned short chip_number;
2988 int baud, baud_rate = 0;
2989 int i;
2990
2991 if (!info->tty || !info->tty->termios)
2992 return;
2993
2994 if (info->line == -1)
2995 return;
2996
2997 cflag = info->tty->termios->c_cflag;
2998 iflag = info->tty->termios->c_iflag;
2999
3000 /*
3001 * Set up the tty->alt_speed kludge
3002 */
3003 if (info->tty) {
3004 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
3005 info->tty->alt_speed = 57600;
3006 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
3007 info->tty->alt_speed = 115200;
3008 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
3009 info->tty->alt_speed = 230400;
3010 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
3011 info->tty->alt_speed = 460800;
3012 }
3013
3014 card = info->card;
3015 channel = info->line - card->first_line;
3016 chip_number = channel / 4;
3017
3018 if (!IS_CYC_Z(*card)) {
3019
3020 index = card->bus_index;
3021
3022 /* baud rate */
3023 baud = tty_get_baud_rate(info->tty);
3024 if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
3025 ASYNC_SPD_CUST) {
3026 if (info->custom_divisor)
3027 baud_rate = info->baud / info->custom_divisor;
3028 else
3029 baud_rate = info->baud;
3030 } else if (baud > CD1400_MAX_SPEED) {
3031 baud = CD1400_MAX_SPEED;
3032 }
3033 /* find the baud index */
3034 for (i = 0; i < 20; i++) {
3035 if (baud == baud_table[i])
3036 break;
3037 }
3038 if (i == 20)
3039 i = 19; /* CD1400_MAX_SPEED */
3040
3041 if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
3042 ASYNC_SPD_CUST) {
3043 cyy_baud_calc(info, baud_rate);
3044 } else {
3045 if (info->chip_rev >= CD1400_REV_J) {
3046 /* It is a CD1400 rev. J or later */
3047 info->tbpr = baud_bpr_60[i]; /* Tx BPR */
3048 info->tco = baud_co_60[i]; /* Tx CO */
3049 info->rbpr = baud_bpr_60[i]; /* Rx BPR */
3050 info->rco = baud_co_60[i]; /* Rx CO */
3051 } else {
3052 info->tbpr = baud_bpr_25[i]; /* Tx BPR */
3053 info->tco = baud_co_25[i]; /* Tx CO */
3054 info->rbpr = baud_bpr_25[i]; /* Rx BPR */
3055 info->rco = baud_co_25[i]; /* Rx CO */
3056 }
3057 }
3058 if (baud_table[i] == 134) {
3059 /* get it right for 134.5 baud */
3060 info->timeout = (info->xmit_fifo_size * HZ * 30 / 269) +
3061 2;
3062 } else if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
3063 ASYNC_SPD_CUST) {
3064 info->timeout = (info->xmit_fifo_size * HZ * 15 /
3065 baud_rate) + 2;
3066 } else if (baud_table[i]) {
3067 info->timeout = (info->xmit_fifo_size * HZ * 15 /
3068 baud_table[i]) + 2;
3069 /* this needs to be propagated into the card info */
3070 } else {
3071 info->timeout = 0;
3072 }
3073 /* By tradition (is it a standard?) a baud rate of zero
3074 implies the line should be/has been closed. A bit
3075 later in this routine such a test is performed. */
3076
3077 /* byte size and parity */
3078 info->cor5 = 0;
3079 info->cor4 = 0;
3080 /* receive threshold */
3081 info->cor3 = (info->default_threshold ?
3082 info->default_threshold : baud_cor3[i]);
3083 info->cor2 = CyETC;
3084 switch (cflag & CSIZE) {
3085 case CS5:
3086 info->cor1 = Cy_5_BITS;
3087 break;
3088 case CS6:
3089 info->cor1 = Cy_6_BITS;
3090 break;
3091 case CS7:
3092 info->cor1 = Cy_7_BITS;
3093 break;
3094 case CS8:
3095 info->cor1 = Cy_8_BITS;
3096 break;
3097 }
3098 if (cflag & CSTOPB)
3099 info->cor1 |= Cy_2_STOP;
3100
3101 if (cflag & PARENB) {
3102 if (cflag & PARODD)
3103 info->cor1 |= CyPARITY_O;
3104 else
3105 info->cor1 |= CyPARITY_E;
3106 } else
3107 info->cor1 |= CyPARITY_NONE;
3108
3109 /* CTS flow control flag */
3110 if (cflag & CRTSCTS) {
3111 info->flags |= ASYNC_CTS_FLOW;
3112 info->cor2 |= CyCtsAE;
3113 } else {
3114 info->flags &= ~ASYNC_CTS_FLOW;
3115 info->cor2 &= ~CyCtsAE;
3116 }
3117 if (cflag & CLOCAL)
3118 info->flags &= ~ASYNC_CHECK_CD;
3119 else
3120 info->flags |= ASYNC_CHECK_CD;
3121
3122 /***********************************************
3123 The hardware option, CyRtsAO, presents RTS when
3124 the chip has characters to send. Since most modems
3125 use RTS as reverse (inbound) flow control, this
3126 option is not used. If inbound flow control is
3127 necessary, DTR can be programmed to provide the
3128 appropriate signals for use with a non-standard
3129 cable. Contact Marcio Saito for details.
3130 ***********************************************/
3131
3132 chip = channel >> 2;
3133 channel &= 0x03;
3134 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3135
3136 spin_lock_irqsave(&card->card_lock, flags);
3137 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
3138
3139 /* tx and rx baud rate */
3140
3141 cy_writeb(base_addr + (CyTCOR << index), info->tco);
3142 cy_writeb(base_addr + (CyTBPR << index), info->tbpr);
3143 cy_writeb(base_addr + (CyRCOR << index), info->rco);
3144 cy_writeb(base_addr + (CyRBPR << index), info->rbpr);
3145
3146 /* set line characteristics according configuration */
3147
3148 cy_writeb(base_addr + (CySCHR1 << index),
3149 START_CHAR(info->tty));
3150 cy_writeb(base_addr + (CySCHR2 << index), STOP_CHAR(info->tty));
3151 cy_writeb(base_addr + (CyCOR1 << index), info->cor1);
3152 cy_writeb(base_addr + (CyCOR2 << index), info->cor2);
3153 cy_writeb(base_addr + (CyCOR3 << index), info->cor3);
3154 cy_writeb(base_addr + (CyCOR4 << index), info->cor4);
3155 cy_writeb(base_addr + (CyCOR5 << index), info->cor5);
3156
3157 cyy_issue_cmd(base_addr, CyCOR_CHANGE | CyCOR1ch | CyCOR2ch |
3158 CyCOR3ch, index);
3159
3160 /* !!! Is this needed? */
3161 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
3162 cy_writeb(base_addr + (CyRTPR << index),
3163 (info->default_timeout ? info->default_timeout : 0x02));
3164 /* 10ms rx timeout */
3165
3166 if (C_CLOCAL(info->tty)) {
3167 /* without modem intr */
3168 cy_writeb(base_addr + (CySRER << index),
3169 readb(base_addr + (CySRER << index)) | CyMdmCh);
3170 /* act on 1->0 modem transitions */
3171 if ((cflag & CRTSCTS) && info->rflow) {
3172 cy_writeb(base_addr + (CyMCOR1 << index),
3173 (CyCTS | rflow_thr[i]));
3174 } else {
3175 cy_writeb(base_addr + (CyMCOR1 << index),
3176 CyCTS);
3177 }
3178 /* act on 0->1 modem transitions */
3179 cy_writeb(base_addr + (CyMCOR2 << index), CyCTS);
3180 } else {
3181 /* without modem intr */
3182 cy_writeb(base_addr + (CySRER << index),
3183 readb(base_addr +
3184 (CySRER << index)) | CyMdmCh);
3185 /* act on 1->0 modem transitions */
3186 if ((cflag & CRTSCTS) && info->rflow) {
3187 cy_writeb(base_addr + (CyMCOR1 << index),
3188 (CyDSR | CyCTS | CyRI | CyDCD |
3189 rflow_thr[i]));
3190 } else {
3191 cy_writeb(base_addr + (CyMCOR1 << index),
3192 CyDSR | CyCTS | CyRI | CyDCD);
3193 }
3194 /* act on 0->1 modem transitions */
3195 cy_writeb(base_addr + (CyMCOR2 << index),
3196 CyDSR | CyCTS | CyRI | CyDCD);
3197 }
3198
3199 if (i == 0) { /* baud rate is zero, turn off line */
3200 if (info->rtsdtr_inv) {
3201 cy_writeb(base_addr + (CyMSVR1 << index),
3202 ~CyRTS);
3203 } else {
3204 cy_writeb(base_addr + (CyMSVR2 << index),
3205 ~CyDTR);
3206 }
3207 #ifdef CY_DEBUG_DTR
3208 printk(KERN_DEBUG "cyc:set_line_char dropping DTR\n");
3209 printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
3210 readb(base_addr + (CyMSVR1 << index)),
3211 readb(base_addr + (CyMSVR2 << index)));
3212 #endif
3213 } else {
3214 if (info->rtsdtr_inv) {
3215 cy_writeb(base_addr + (CyMSVR1 << index),
3216 CyRTS);
3217 } else {
3218 cy_writeb(base_addr + (CyMSVR2 << index),
3219 CyDTR);
3220 }
3221 #ifdef CY_DEBUG_DTR
3222 printk(KERN_DEBUG "cyc:set_line_char raising DTR\n");
3223 printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
3224 readb(base_addr + (CyMSVR1 << index)),
3225 readb(base_addr + (CyMSVR2 << index)));
3226 #endif
3227 }
3228
3229 if (info->tty)
3230 clear_bit(TTY_IO_ERROR, &info->tty->flags);
3231 spin_unlock_irqrestore(&card->card_lock, flags);
3232
3233 } else {
3234 struct FIRM_ID __iomem *firm_id;
3235 struct ZFW_CTRL __iomem *zfw_ctrl;
3236 struct BOARD_CTRL __iomem *board_ctrl;
3237 struct CH_CTRL __iomem *ch_ctrl;
3238 struct BUF_CTRL __iomem *buf_ctrl;
3239 __u32 sw_flow;
3240 int retval;
3241
3242 firm_id = card->base_addr + ID_ADDRESS;
3243 if (!ISZLOADED(*card))
3244 return;
3245
3246 zfw_ctrl = card->base_addr +
3247 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
3248 board_ctrl = &zfw_ctrl->board_ctrl;
3249 ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]);
3250 buf_ctrl = &zfw_ctrl->buf_ctrl[channel];
3251
3252 /* baud rate */
3253 baud = tty_get_baud_rate(info->tty);
3254 if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
3255 ASYNC_SPD_CUST) {
3256 if (info->custom_divisor)
3257 baud_rate = info->baud / info->custom_divisor;
3258 else
3259 baud_rate = info->baud;
3260 } else if (baud > CYZ_MAX_SPEED) {
3261 baud = CYZ_MAX_SPEED;
3262 }
3263 cy_writel(&ch_ctrl->comm_baud, baud);
3264
3265 if (baud == 134) {
3266 /* get it right for 134.5 baud */
3267 info->timeout = (info->xmit_fifo_size * HZ * 30 / 269) +
3268 2;
3269 } else if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
3270 ASYNC_SPD_CUST) {
3271 info->timeout = (info->xmit_fifo_size * HZ * 15 /
3272 baud_rate) + 2;
3273 } else if (baud) {
3274 info->timeout = (info->xmit_fifo_size * HZ * 15 /
3275 baud) + 2;
3276 /* this needs to be propagated into the card info */
3277 } else {
3278 info->timeout = 0;
3279 }
3280
3281 /* byte size and parity */
3282 switch (cflag & CSIZE) {
3283 case CS5:
3284 cy_writel(&ch_ctrl->comm_data_l, C_DL_CS5);
3285 break;
3286 case CS6:
3287 cy_writel(&ch_ctrl->comm_data_l, C_DL_CS6);
3288 break;
3289 case CS7:
3290 cy_writel(&ch_ctrl->comm_data_l, C_DL_CS7);
3291 break;
3292 case CS8:
3293 cy_writel(&ch_ctrl->comm_data_l, C_DL_CS8);
3294 break;
3295 }
3296 if (cflag & CSTOPB) {
3297 cy_writel(&ch_ctrl->comm_data_l,
3298 readl(&ch_ctrl->comm_data_l) | C_DL_2STOP);
3299 } else {
3300 cy_writel(&ch_ctrl->comm_data_l,
3301 readl(&ch_ctrl->comm_data_l) | C_DL_1STOP);
3302 }
3303 if (cflag & PARENB) {
3304 if (cflag & PARODD)
3305 cy_writel(&ch_ctrl->comm_parity, C_PR_ODD);
3306 else
3307 cy_writel(&ch_ctrl->comm_parity, C_PR_EVEN);
3308 } else
3309 cy_writel(&ch_ctrl->comm_parity, C_PR_NONE);
3310
3311 /* CTS flow control flag */
3312 if (cflag & CRTSCTS) {
3313 cy_writel(&ch_ctrl->hw_flow,
3314 readl(&ch_ctrl->hw_flow) | C_RS_CTS | C_RS_RTS);
3315 } else {
3316 cy_writel(&ch_ctrl->hw_flow, readl(&ch_ctrl->hw_flow) &
3317 ~(C_RS_CTS | C_RS_RTS));
3318 }
3319 /* As the HW flow control is done in firmware, the driver
3320 doesn't need to care about it */
3321 info->flags &= ~ASYNC_CTS_FLOW;
3322
3323 /* XON/XOFF/XANY flow control flags */
3324 sw_flow = 0;
3325 if (iflag & IXON) {
3326 sw_flow |= C_FL_OXX;
3327 if (iflag & IXANY)
3328 sw_flow |= C_FL_OIXANY;
3329 }
3330 cy_writel(&ch_ctrl->sw_flow, sw_flow);
3331
3332 retval = cyz_issue_cmd(card, channel, C_CM_IOCTL, 0L);
3333 if (retval != 0) {
3334 printk(KERN_ERR "cyc:set_line_char retval on ttyC%d "
3335 "was %x\n", info->line, retval);
3336 }
3337
3338 /* CD sensitivity */
3339 if (cflag & CLOCAL)
3340 info->flags &= ~ASYNC_CHECK_CD;
3341 else
3342 info->flags |= ASYNC_CHECK_CD;
3343
3344 if (baud == 0) { /* baud rate is zero, turn off line */
3345 cy_writel(&ch_ctrl->rs_control,
3346 readl(&ch_ctrl->rs_control) & ~C_RS_DTR);
3347 #ifdef CY_DEBUG_DTR
3348 printk(KERN_DEBUG "cyc:set_line_char dropping Z DTR\n");
3349 #endif
3350 } else {
3351 cy_writel(&ch_ctrl->rs_control,
3352 readl(&ch_ctrl->rs_control) | C_RS_DTR);
3353 #ifdef CY_DEBUG_DTR
3354 printk(KERN_DEBUG "cyc:set_line_char raising Z DTR\n");
3355 #endif
3356 }
3357
3358 retval = cyz_issue_cmd(card, channel, C_CM_IOCTLM, 0L);
3359 if (retval != 0) {
3360 printk(KERN_ERR "cyc:set_line_char(2) retval on ttyC%d "
3361 "was %x\n", info->line, retval);
3362 }
3363
3364 if (info->tty)
3365 clear_bit(TTY_IO_ERROR, &info->tty->flags);
3366 }
3367 } /* set_line_char */
3368
3369 static int
3370 get_serial_info(struct cyclades_port *info,
3371 struct serial_struct __user *retinfo)
3372 {
3373 struct serial_struct tmp;
3374 struct cyclades_card *cinfo = info->card;
3375
3376 if (!retinfo)
3377 return -EFAULT;
3378 memset(&tmp, 0, sizeof(tmp));
3379 tmp.type = info->type;
3380 tmp.line = info->line;
3381 tmp.port = (info->card - cy_card) * 0x100 + info->line -
3382 cinfo->first_line;
3383 tmp.irq = cinfo->irq;
3384 tmp.flags = info->flags;
3385 tmp.close_delay = info->close_delay;
3386 tmp.closing_wait = info->closing_wait;
3387 tmp.baud_base = info->baud;
3388 tmp.custom_divisor = info->custom_divisor;
3389 tmp.hub6 = 0; /*!!! */
3390 return copy_to_user(retinfo, &tmp, sizeof(*retinfo)) ? -EFAULT : 0;
3391 } /* get_serial_info */
3392
3393 static int
3394 set_serial_info(struct cyclades_port *info,
3395 struct serial_struct __user *new_info)
3396 {
3397 struct serial_struct new_serial;
3398 struct cyclades_port old_info;
3399
3400 if (copy_from_user(&new_serial, new_info, sizeof(new_serial)))
3401 return -EFAULT;
3402 old_info = *info;
3403
3404 if (!capable(CAP_SYS_ADMIN)) {
3405 if (new_serial.close_delay != info->close_delay ||
3406 new_serial.baud_base != info->baud ||
3407 (new_serial.flags & ASYNC_FLAGS &
3408 ~ASYNC_USR_MASK) !=
3409 (info->flags & ASYNC_FLAGS & ~ASYNC_USR_MASK))
3410 return -EPERM;
3411 info->flags = (info->flags & ~ASYNC_USR_MASK) |
3412 (new_serial.flags & ASYNC_USR_MASK);
3413 info->baud = new_serial.baud_base;
3414 info->custom_divisor = new_serial.custom_divisor;
3415 goto check_and_exit;
3416 }
3417
3418 /*
3419 * OK, past this point, all the error checking has been done.
3420 * At this point, we start making changes.....
3421 */
3422
3423 info->baud = new_serial.baud_base;
3424 info->custom_divisor = new_serial.custom_divisor;
3425 info->flags = (info->flags & ~ASYNC_FLAGS) |
3426 (new_serial.flags & ASYNC_FLAGS);
3427 info->close_delay = new_serial.close_delay * HZ / 100;
3428 info->closing_wait = new_serial.closing_wait * HZ / 100;
3429
3430 check_and_exit:
3431 if (info->flags & ASYNC_INITIALIZED) {
3432 set_line_char(info);
3433 return 0;
3434 } else {
3435 return startup(info);
3436 }
3437 } /* set_serial_info */
3438
3439 /*
3440 * get_lsr_info - get line status register info
3441 *
3442 * Purpose: Let user call ioctl() to get info when the UART physically
3443 * is emptied. On bus types like RS485, the transmitter must
3444 * release the bus after transmitting. This must be done when
3445 * the transmit shift register is empty, not be done when the
3446 * transmit holding register is empty. This functionality
3447 * allows an RS485 driver to be written in user space.
3448 */
3449 static int get_lsr_info(struct cyclades_port *info, unsigned int __user *value)
3450 {
3451 struct cyclades_card *card;
3452 int chip, channel, index;
3453 unsigned char status;
3454 unsigned int result;
3455 unsigned long flags;
3456 void __iomem *base_addr;
3457
3458 card = info->card;
3459 channel = (info->line) - (card->first_line);
3460 if (!IS_CYC_Z(*card)) {
3461 chip = channel >> 2;
3462 channel &= 0x03;
3463 index = card->bus_index;
3464 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3465
3466 spin_lock_irqsave(&card->card_lock, flags);
3467 status = readb(base_addr + (CySRER << index)) &
3468 (CyTxRdy | CyTxMpty);
3469 spin_unlock_irqrestore(&card->card_lock, flags);
3470 result = (status ? 0 : TIOCSER_TEMT);
3471 } else {
3472 /* Not supported yet */
3473 return -EINVAL;
3474 }
3475 return put_user(result, (unsigned long __user *)value);
3476 }
3477
3478 static int cy_tiocmget(struct tty_struct *tty, struct file *file)
3479 {
3480 struct cyclades_port *info = tty->driver_data;
3481 struct cyclades_card *card;
3482 int chip, channel, index;
3483 void __iomem *base_addr;
3484 unsigned long flags;
3485 unsigned char status;
3486 unsigned long lstatus;
3487 unsigned int result;
3488 struct FIRM_ID __iomem *firm_id;
3489 struct ZFW_CTRL __iomem *zfw_ctrl;
3490 struct BOARD_CTRL __iomem *board_ctrl;
3491 struct CH_CTRL __iomem *ch_ctrl;
3492
3493 if (serial_paranoia_check(info, tty->name, __func__))
3494 return -ENODEV;
3495
3496 lock_kernel();
3497
3498 card = info->card;
3499 channel = info->line - card->first_line;
3500 if (!IS_CYC_Z(*card)) {
3501 chip = channel >> 2;
3502 channel &= 0x03;
3503 index = card->bus_index;
3504 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3505
3506 spin_lock_irqsave(&card->card_lock, flags);
3507 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
3508 status = readb(base_addr + (CyMSVR1 << index));
3509 status |= readb(base_addr + (CyMSVR2 << index));
3510 spin_unlock_irqrestore(&card->card_lock, flags);
3511
3512 if (info->rtsdtr_inv) {
3513 result = ((status & CyRTS) ? TIOCM_DTR : 0) |
3514 ((status & CyDTR) ? TIOCM_RTS : 0);
3515 } else {
3516 result = ((status & CyRTS) ? TIOCM_RTS : 0) |
3517 ((status & CyDTR) ? TIOCM_DTR : 0);
3518 }
3519 result |= ((status & CyDCD) ? TIOCM_CAR : 0) |
3520 ((status & CyRI) ? TIOCM_RNG : 0) |
3521 ((status & CyDSR) ? TIOCM_DSR : 0) |
3522 ((status & CyCTS) ? TIOCM_CTS : 0);
3523 } else {
3524 base_addr = card->base_addr;
3525 firm_id = card->base_addr + ID_ADDRESS;
3526 if (ISZLOADED(*card)) {
3527 zfw_ctrl = card->base_addr +
3528 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
3529 board_ctrl = &zfw_ctrl->board_ctrl;
3530 ch_ctrl = zfw_ctrl->ch_ctrl;
3531 lstatus = readl(&ch_ctrl[channel].rs_status);
3532 result = ((lstatus & C_RS_RTS) ? TIOCM_RTS : 0) |
3533 ((lstatus & C_RS_DTR) ? TIOCM_DTR : 0) |
3534 ((lstatus & C_RS_DCD) ? TIOCM_CAR : 0) |
3535 ((lstatus & C_RS_RI) ? TIOCM_RNG : 0) |
3536 ((lstatus & C_RS_DSR) ? TIOCM_DSR : 0) |
3537 ((lstatus & C_RS_CTS) ? TIOCM_CTS : 0);
3538 } else {
3539 result = 0;
3540 unlock_kernel();
3541 return -ENODEV;
3542 }
3543
3544 }
3545 unlock_kernel();
3546 return result;
3547 } /* cy_tiomget */
3548
3549 static int
3550 cy_tiocmset(struct tty_struct *tty, struct file *file,
3551 unsigned int set, unsigned int clear)
3552 {
3553 struct cyclades_port *info = tty->driver_data;
3554 struct cyclades_card *card;
3555 int chip, channel, index;
3556 void __iomem *base_addr;
3557 unsigned long flags;
3558 struct FIRM_ID __iomem *firm_id;
3559 struct ZFW_CTRL __iomem *zfw_ctrl;
3560 struct BOARD_CTRL __iomem *board_ctrl;
3561 struct CH_CTRL __iomem *ch_ctrl;
3562 int retval;
3563
3564 if (serial_paranoia_check(info, tty->name, __func__))
3565 return -ENODEV;
3566
3567 card = info->card;
3568 channel = (info->line) - (card->first_line);
3569 if (!IS_CYC_Z(*card)) {
3570 chip = channel >> 2;
3571 channel &= 0x03;
3572 index = card->bus_index;
3573 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3574
3575 if (set & TIOCM_RTS) {
3576 spin_lock_irqsave(&card->card_lock, flags);
3577 cy_writeb(base_addr + (CyCAR << index),
3578 (u_char) channel);
3579 if (info->rtsdtr_inv) {
3580 cy_writeb(base_addr + (CyMSVR2 << index),
3581 CyDTR);
3582 } else {
3583 cy_writeb(base_addr + (CyMSVR1 << index),
3584 CyRTS);
3585 }
3586 spin_unlock_irqrestore(&card->card_lock, flags);
3587 }
3588 if (clear & TIOCM_RTS) {
3589 spin_lock_irqsave(&card->card_lock, flags);
3590 cy_writeb(base_addr + (CyCAR << index),
3591 (u_char) channel);
3592 if (info->rtsdtr_inv) {
3593 cy_writeb(base_addr + (CyMSVR2 << index),
3594 ~CyDTR);
3595 } else {
3596 cy_writeb(base_addr + (CyMSVR1 << index),
3597 ~CyRTS);
3598 }
3599 spin_unlock_irqrestore(&card->card_lock, flags);
3600 }
3601 if (set & TIOCM_DTR) {
3602 spin_lock_irqsave(&card->card_lock, flags);
3603 cy_writeb(base_addr + (CyCAR << index),
3604 (u_char) channel);
3605 if (info->rtsdtr_inv) {
3606 cy_writeb(base_addr + (CyMSVR1 << index),
3607 CyRTS);
3608 } else {
3609 cy_writeb(base_addr + (CyMSVR2 << index),
3610 CyDTR);
3611 }
3612 #ifdef CY_DEBUG_DTR
3613 printk(KERN_DEBUG "cyc:set_modem_info raising DTR\n");
3614 printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
3615 readb(base_addr + (CyMSVR1 << index)),
3616 readb(base_addr + (CyMSVR2 << index)));
3617 #endif
3618 spin_unlock_irqrestore(&card->card_lock, flags);
3619 }
3620 if (clear & TIOCM_DTR) {
3621 spin_lock_irqsave(&card->card_lock, flags);
3622 cy_writeb(base_addr + (CyCAR << index),
3623 (u_char) channel);
3624 if (info->rtsdtr_inv) {
3625 cy_writeb(base_addr + (CyMSVR1 << index),
3626 ~CyRTS);
3627 } else {
3628 cy_writeb(base_addr + (CyMSVR2 << index),
3629 ~CyDTR);
3630 }
3631
3632 #ifdef CY_DEBUG_DTR
3633 printk(KERN_DEBUG "cyc:set_modem_info dropping DTR\n");
3634 printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
3635 readb(base_addr + (CyMSVR1 << index)),
3636 readb(base_addr + (CyMSVR2 << index)));
3637 #endif
3638 spin_unlock_irqrestore(&card->card_lock, flags);
3639 }
3640 } else {
3641 base_addr = card->base_addr;
3642
3643 firm_id = card->base_addr + ID_ADDRESS;
3644 if (ISZLOADED(*card)) {
3645 zfw_ctrl = card->base_addr +
3646 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
3647 board_ctrl = &zfw_ctrl->board_ctrl;
3648 ch_ctrl = zfw_ctrl->ch_ctrl;
3649
3650 if (set & TIOCM_RTS) {
3651 spin_lock_irqsave(&card->card_lock, flags);
3652 cy_writel(&ch_ctrl[channel].rs_control,
3653 readl(&ch_ctrl[channel].rs_control) |
3654 C_RS_RTS);
3655 spin_unlock_irqrestore(&card->card_lock, flags);
3656 }
3657 if (clear & TIOCM_RTS) {
3658 spin_lock_irqsave(&card->card_lock, flags);
3659 cy_writel(&ch_ctrl[channel].rs_control,
3660 readl(&ch_ctrl[channel].rs_control) &
3661 ~C_RS_RTS);
3662 spin_unlock_irqrestore(&card->card_lock, flags);
3663 }
3664 if (set & TIOCM_DTR) {
3665 spin_lock_irqsave(&card->card_lock, flags);
3666 cy_writel(&ch_ctrl[channel].rs_control,
3667 readl(&ch_ctrl[channel].rs_control) |
3668 C_RS_DTR);
3669 #ifdef CY_DEBUG_DTR
3670 printk(KERN_DEBUG "cyc:set_modem_info raising "
3671 "Z DTR\n");
3672 #endif
3673 spin_unlock_irqrestore(&card->card_lock, flags);
3674 }
3675 if (clear & TIOCM_DTR) {
3676 spin_lock_irqsave(&card->card_lock, flags);
3677 cy_writel(&ch_ctrl[channel].rs_control,
3678 readl(&ch_ctrl[channel].rs_control) &
3679 ~C_RS_DTR);
3680 #ifdef CY_DEBUG_DTR
3681 printk(KERN_DEBUG "cyc:set_modem_info clearing "
3682 "Z DTR\n");
3683 #endif
3684 spin_unlock_irqrestore(&card->card_lock, flags);
3685 }
3686 } else {
3687 return -ENODEV;
3688 }
3689 spin_lock_irqsave(&card->card_lock, flags);
3690 retval = cyz_issue_cmd(card, channel, C_CM_IOCTLM, 0L);
3691 if (retval != 0) {
3692 printk(KERN_ERR "cyc:set_modem_info retval on ttyC%d "
3693 "was %x\n", info->line, retval);
3694 }
3695 spin_unlock_irqrestore(&card->card_lock, flags);
3696 }
3697 return 0;
3698 } /* cy_tiocmset */
3699
3700 /*
3701 * cy_break() --- routine which turns the break handling on or off
3702 */
3703 static void cy_break(struct tty_struct *tty, int break_state)
3704 {
3705 struct cyclades_port *info = tty->driver_data;
3706 struct cyclades_card *card;
3707 unsigned long flags;
3708
3709 if (serial_paranoia_check(info, tty->name, "cy_break"))
3710 return;
3711
3712 card = info->card;
3713
3714 spin_lock_irqsave(&card->card_lock, flags);
3715 if (!IS_CYC_Z(*card)) {
3716 /* Let the transmit ISR take care of this (since it
3717 requires stuffing characters into the output stream).
3718 */
3719 if (break_state == -1) {
3720 if (!info->breakon) {
3721 info->breakon = 1;
3722 if (!info->xmit_cnt) {
3723 spin_unlock_irqrestore(&card->card_lock, flags);
3724 start_xmit(info);
3725 spin_lock_irqsave(&card->card_lock, flags);
3726 }
3727 }
3728 } else {
3729 if (!info->breakoff) {
3730 info->breakoff = 1;
3731 if (!info->xmit_cnt) {
3732 spin_unlock_irqrestore(&card->card_lock, flags);
3733 start_xmit(info);
3734 spin_lock_irqsave(&card->card_lock, flags);
3735 }
3736 }
3737 }
3738 } else {
3739 int retval;
3740
3741 if (break_state == -1) {
3742 retval = cyz_issue_cmd(card,
3743 info->line - card->first_line,
3744 C_CM_SET_BREAK, 0L);
3745 if (retval != 0) {
3746 printk(KERN_ERR "cyc:cy_break (set) retval on "
3747 "ttyC%d was %x\n", info->line, retval);
3748 }
3749 } else {
3750 retval = cyz_issue_cmd(card,
3751 info->line - card->first_line,
3752 C_CM_CLR_BREAK, 0L);
3753 if (retval != 0) {
3754 printk(KERN_DEBUG "cyc:cy_break (clr) retval "
3755 "on ttyC%d was %x\n", info->line,
3756 retval);
3757 }
3758 }
3759 }
3760 spin_unlock_irqrestore(&card->card_lock, flags);
3761 } /* cy_break */
3762
3763 static int get_mon_info(struct cyclades_port *info,
3764 struct cyclades_monitor __user *mon)
3765 {
3766
3767 if (copy_to_user(mon, &info->mon, sizeof(struct cyclades_monitor)))
3768 return -EFAULT;
3769 info->mon.int_count = 0;
3770 info->mon.char_count = 0;
3771 info->mon.char_max = 0;
3772 info->mon.char_last = 0;
3773 return 0;
3774 } /* get_mon_info */
3775
3776 static int set_threshold(struct cyclades_port *info, unsigned long value)
3777 {
3778 struct cyclades_card *card;
3779 void __iomem *base_addr;
3780 int channel, chip, index;
3781 unsigned long flags;
3782
3783 card = info->card;
3784 channel = info->line - card->first_line;
3785 if (!IS_CYC_Z(*card)) {
3786 chip = channel >> 2;
3787 channel &= 0x03;
3788 index = card->bus_index;
3789 base_addr =
3790 card->base_addr + (cy_chip_offset[chip] << index);
3791
3792 info->cor3 &= ~CyREC_FIFO;
3793 info->cor3 |= value & CyREC_FIFO;
3794
3795 spin_lock_irqsave(&card->card_lock, flags);
3796 cy_writeb(base_addr + (CyCOR3 << index), info->cor3);
3797 cyy_issue_cmd(base_addr, CyCOR_CHANGE | CyCOR3ch, index);
3798 spin_unlock_irqrestore(&card->card_lock, flags);
3799 }
3800 return 0;
3801 } /* set_threshold */
3802
3803 static int get_threshold(struct cyclades_port *info,
3804 unsigned long __user *value)
3805 {
3806 struct cyclades_card *card;
3807 void __iomem *base_addr;
3808 int channel, chip, index;
3809 unsigned long tmp;
3810
3811 card = info->card;
3812 channel = info->line - card->first_line;
3813 if (!IS_CYC_Z(*card)) {
3814 chip = channel >> 2;
3815 channel &= 0x03;
3816 index = card->bus_index;
3817 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3818
3819 tmp = readb(base_addr + (CyCOR3 << index)) & CyREC_FIFO;
3820 return put_user(tmp, value);
3821 }
3822 return 0;
3823 } /* get_threshold */
3824
3825 static int set_default_threshold(struct cyclades_port *info,
3826 unsigned long value)
3827 {
3828 info->default_threshold = value & 0x0f;
3829 return 0;
3830 } /* set_default_threshold */
3831
3832 static int get_default_threshold(struct cyclades_port *info,
3833 unsigned long __user *value)
3834 {
3835 return put_user(info->default_threshold, value);
3836 } /* get_default_threshold */
3837
3838 static int set_timeout(struct cyclades_port *info, unsigned long value)
3839 {
3840 struct cyclades_card *card;
3841 void __iomem *base_addr;
3842 int channel, chip, index;
3843 unsigned long flags;
3844
3845 card = info->card;
3846 channel = info->line - card->first_line;
3847 if (!IS_CYC_Z(*card)) {
3848 chip = channel >> 2;
3849 channel &= 0x03;
3850 index = card->bus_index;
3851 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3852
3853 spin_lock_irqsave(&card->card_lock, flags);
3854 cy_writeb(base_addr + (CyRTPR << index), value & 0xff);
3855 spin_unlock_irqrestore(&card->card_lock, flags);
3856 }
3857 return 0;
3858 } /* set_timeout */
3859
3860 static int get_timeout(struct cyclades_port *info,
3861 unsigned long __user *value)
3862 {
3863 struct cyclades_card *card;
3864 void __iomem *base_addr;
3865 int channel, chip, index;
3866 unsigned long tmp;
3867
3868 card = info->card;
3869 channel = info->line - card->first_line;
3870 if (!IS_CYC_Z(*card)) {
3871 chip = channel >> 2;
3872 channel &= 0x03;
3873 index = card->bus_index;
3874 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3875
3876 tmp = readb(base_addr + (CyRTPR << index));
3877 return put_user(tmp, value);
3878 }
3879 return 0;
3880 } /* get_timeout */
3881
3882 static int set_default_timeout(struct cyclades_port *info, unsigned long value)
3883 {
3884 info->default_timeout = value & 0xff;
3885 return 0;
3886 } /* set_default_timeout */
3887
3888 static int get_default_timeout(struct cyclades_port *info,
3889 unsigned long __user *value)
3890 {
3891 return put_user(info->default_timeout, value);
3892 } /* get_default_timeout */
3893
3894 /*
3895 * This routine allows the tty driver to implement device-
3896 * specific ioctl's. If the ioctl number passed in cmd is
3897 * not recognized by the driver, it should return ENOIOCTLCMD.
3898 */
3899 static int
3900 cy_ioctl(struct tty_struct *tty, struct file *file,
3901 unsigned int cmd, unsigned long arg)
3902 {
3903 struct cyclades_port *info = tty->driver_data;
3904 struct cyclades_icount cprev, cnow; /* kernel counter temps */
3905 struct serial_icounter_struct __user *p_cuser; /* user space */
3906 int ret_val = 0;
3907 unsigned long flags;
3908 void __user *argp = (void __user *)arg;
3909
3910 if (serial_paranoia_check(info, tty->name, "cy_ioctl"))
3911 return -ENODEV;
3912
3913 #ifdef CY_DEBUG_OTHER
3914 printk(KERN_DEBUG "cyc:cy_ioctl ttyC%d, cmd = %x arg = %lx\n",
3915 info->line, cmd, arg);
3916 #endif
3917 lock_kernel();
3918
3919 switch (cmd) {
3920 case CYGETMON:
3921 ret_val = get_mon_info(info, argp);
3922 break;
3923 case CYGETTHRESH:
3924 ret_val = get_threshold(info, argp);
3925 break;
3926 case CYSETTHRESH:
3927 ret_val = set_threshold(info, arg);
3928 break;
3929 case CYGETDEFTHRESH:
3930 ret_val = get_default_threshold(info, argp);
3931 break;
3932 case CYSETDEFTHRESH:
3933 ret_val = set_default_threshold(info, arg);
3934 break;
3935 case CYGETTIMEOUT:
3936 ret_val = get_timeout(info, argp);
3937 break;
3938 case CYSETTIMEOUT:
3939 ret_val = set_timeout(info, arg);
3940 break;
3941 case CYGETDEFTIMEOUT:
3942 ret_val = get_default_timeout(info, argp);
3943 break;
3944 case CYSETDEFTIMEOUT:
3945 ret_val = set_default_timeout(info, arg);
3946 break;
3947 case CYSETRFLOW:
3948 info->rflow = (int)arg;
3949 ret_val = 0;
3950 break;
3951 case CYGETRFLOW:
3952 ret_val = info->rflow;
3953 break;
3954 case CYSETRTSDTR_INV:
3955 info->rtsdtr_inv = (int)arg;
3956 ret_val = 0;
3957 break;
3958 case CYGETRTSDTR_INV:
3959 ret_val = info->rtsdtr_inv;
3960 break;
3961 case CYGETCD1400VER:
3962 ret_val = info->chip_rev;
3963 break;
3964 #ifndef CONFIG_CYZ_INTR
3965 case CYZSETPOLLCYCLE:
3966 cyz_polling_cycle = (arg * HZ) / 1000;
3967 ret_val = 0;
3968 break;
3969 case CYZGETPOLLCYCLE:
3970 ret_val = (cyz_polling_cycle * 1000) / HZ;
3971 break;
3972 #endif /* CONFIG_CYZ_INTR */
3973 case CYSETWAIT:
3974 info->closing_wait = (unsigned short)arg * HZ / 100;
3975 ret_val = 0;
3976 break;
3977 case CYGETWAIT:
3978 ret_val = info->closing_wait / (HZ / 100);
3979 break;
3980 case TIOCGSERIAL:
3981 ret_val = get_serial_info(info, argp);
3982 break;
3983 case TIOCSSERIAL:
3984 ret_val = set_serial_info(info, argp);
3985 break;
3986 case TIOCSERGETLSR: /* Get line status register */
3987 ret_val = get_lsr_info(info, argp);
3988 break;
3989 /*
3990 * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
3991 * - mask passed in arg for lines of interest
3992 * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
3993 * Caller should use TIOCGICOUNT to see which one it was
3994 */
3995 case TIOCMIWAIT:
3996 spin_lock_irqsave(&info->card->card_lock, flags);
3997 /* note the counters on entry */
3998 cnow = info->icount;
3999 spin_unlock_irqrestore(&info->card->card_lock, flags);
4000 ret_val = wait_event_interruptible(info->delta_msr_wait, ({
4001 cprev = cnow;
4002 spin_lock_irqsave(&info->card->card_lock, flags);
4003 cnow = info->icount; /* atomic copy */
4004 spin_unlock_irqrestore(&info->card->card_lock, flags);
4005
4006 ((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
4007 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
4008 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) ||
4009 ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts));
4010 }));
4011 break;
4012
4013 /*
4014 * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
4015 * Return: write counters to the user passed counter struct
4016 * NB: both 1->0 and 0->1 transitions are counted except for
4017 * RI where only 0->1 is counted.
4018 */
4019 case TIOCGICOUNT:
4020 spin_lock_irqsave(&info->card->card_lock, flags);
4021 cnow = info->icount;
4022 spin_unlock_irqrestore(&info->card->card_lock, flags);
4023 p_cuser = argp;
4024 ret_val = put_user(cnow.cts, &p_cuser->cts);
4025 if (ret_val)
4026 break;
4027 ret_val = put_user(cnow.dsr, &p_cuser->dsr);
4028 if (ret_val)
4029 break;
4030 ret_val = put_user(cnow.rng, &p_cuser->rng);
4031 if (ret_val)
4032 break;
4033 ret_val = put_user(cnow.dcd, &p_cuser->dcd);
4034 if (ret_val)
4035 break;
4036 ret_val = put_user(cnow.rx, &p_cuser->rx);
4037 if (ret_val)
4038 break;
4039 ret_val = put_user(cnow.tx, &p_cuser->tx);
4040 if (ret_val)
4041 break;
4042 ret_val = put_user(cnow.frame, &p_cuser->frame);
4043 if (ret_val)
4044 break;
4045 ret_val = put_user(cnow.overrun, &p_cuser->overrun);
4046 if (ret_val)
4047 break;
4048 ret_val = put_user(cnow.parity, &p_cuser->parity);
4049 if (ret_val)
4050 break;
4051 ret_val = put_user(cnow.brk, &p_cuser->brk);
4052 if (ret_val)
4053 break;
4054 ret_val = put_user(cnow.buf_overrun, &p_cuser->buf_overrun);
4055 if (ret_val)
4056 break;
4057 ret_val = 0;
4058 break;
4059 default:
4060 ret_val = -ENOIOCTLCMD;
4061 }
4062 unlock_kernel();
4063
4064 #ifdef CY_DEBUG_OTHER
4065 printk(KERN_DEBUG "cyc:cy_ioctl done\n");
4066 #endif
4067 return ret_val;
4068 } /* cy_ioctl */
4069
4070 /*
4071 * This routine allows the tty driver to be notified when
4072 * device's termios settings have changed. Note that a
4073 * well-designed tty driver should be prepared to accept the case
4074 * where old == NULL, and try to do something rational.
4075 */
4076 static void cy_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
4077 {
4078 struct cyclades_port *info = tty->driver_data;
4079
4080 #ifdef CY_DEBUG_OTHER
4081 printk(KERN_DEBUG "cyc:cy_set_termios ttyC%d\n", info->line);
4082 #endif
4083
4084 set_line_char(info);
4085
4086 if ((old_termios->c_cflag & CRTSCTS) &&
4087 !(tty->termios->c_cflag & CRTSCTS)) {
4088 tty->hw_stopped = 0;
4089 cy_start(tty);
4090 }
4091 #if 0
4092 /*
4093 * No need to wake up processes in open wait, since they
4094 * sample the CLOCAL flag once, and don't recheck it.
4095 * XXX It's not clear whether the current behavior is correct
4096 * or not. Hence, this may change.....
4097 */
4098 if (!(old_termios->c_cflag & CLOCAL) &&
4099 (tty->termios->c_cflag & CLOCAL))
4100 wake_up_interruptible(&info->open_wait);
4101 #endif
4102 } /* cy_set_termios */
4103
4104 /* This function is used to send a high-priority XON/XOFF character to
4105 the device.
4106 */
4107 static void cy_send_xchar(struct tty_struct *tty, char ch)
4108 {
4109 struct cyclades_port *info = tty->driver_data;
4110 struct cyclades_card *card;
4111 int channel;
4112
4113 if (serial_paranoia_check(info, tty->name, "cy_send_xchar"))
4114 return;
4115
4116 info->x_char = ch;
4117
4118 if (ch)
4119 cy_start(tty);
4120
4121 card = info->card;
4122 channel = info->line - card->first_line;
4123
4124 if (IS_CYC_Z(*card)) {
4125 if (ch == STOP_CHAR(tty))
4126 cyz_issue_cmd(card, channel, C_CM_SENDXOFF, 0L);
4127 else if (ch == START_CHAR(tty))
4128 cyz_issue_cmd(card, channel, C_CM_SENDXON, 0L);
4129 }
4130 }
4131
4132 /* This routine is called by the upper-layer tty layer to signal
4133 that incoming characters should be throttled because the input
4134 buffers are close to full.
4135 */
4136 static void cy_throttle(struct tty_struct *tty)
4137 {
4138 struct cyclades_port *info = tty->driver_data;
4139 struct cyclades_card *card;
4140 unsigned long flags;
4141 void __iomem *base_addr;
4142 int chip, channel, index;
4143
4144 #ifdef CY_DEBUG_THROTTLE
4145 char buf[64];
4146
4147 printk(KERN_DEBUG "cyc:throttle %s: %ld...ttyC%d\n", tty_name(tty, buf),
4148 tty->ldisc.chars_in_buffer(tty), info->line);
4149 #endif
4150
4151 if (serial_paranoia_check(info, tty->name, "cy_throttle"))
4152 return;
4153
4154 card = info->card;
4155
4156 if (I_IXOFF(tty)) {
4157 if (!IS_CYC_Z(*card))
4158 cy_send_xchar(tty, STOP_CHAR(tty));
4159 else
4160 info->throttle = 1;
4161 }
4162
4163 if (tty->termios->c_cflag & CRTSCTS) {
4164 channel = info->line - card->first_line;
4165 if (!IS_CYC_Z(*card)) {
4166 chip = channel >> 2;
4167 channel &= 0x03;
4168 index = card->bus_index;
4169 base_addr = card->base_addr +
4170 (cy_chip_offset[chip] << index);
4171
4172 spin_lock_irqsave(&card->card_lock, flags);
4173 cy_writeb(base_addr + (CyCAR << index),
4174 (u_char) channel);
4175 if (info->rtsdtr_inv) {
4176 cy_writeb(base_addr + (CyMSVR2 << index),
4177 ~CyDTR);
4178 } else {
4179 cy_writeb(base_addr + (CyMSVR1 << index),
4180 ~CyRTS);
4181 }
4182 spin_unlock_irqrestore(&card->card_lock, flags);
4183 } else {
4184 info->throttle = 1;
4185 }
4186 }
4187 } /* cy_throttle */
4188
4189 /*
4190 * This routine notifies the tty driver that it should signal
4191 * that characters can now be sent to the tty without fear of
4192 * overrunning the input buffers of the line disciplines.
4193 */
4194 static void cy_unthrottle(struct tty_struct *tty)
4195 {
4196 struct cyclades_port *info = tty->driver_data;
4197 struct cyclades_card *card;
4198 unsigned long flags;
4199 void __iomem *base_addr;
4200 int chip, channel, index;
4201
4202 #ifdef CY_DEBUG_THROTTLE
4203 char buf[64];
4204
4205 printk(KERN_DEBUG "cyc:unthrottle %s: %ld...ttyC%d\n",
4206 tty_name(tty, buf), tty_chars_in_buffer(tty), info->line);
4207 #endif
4208
4209 if (serial_paranoia_check(info, tty->name, "cy_unthrottle"))
4210 return;
4211
4212 if (I_IXOFF(tty)) {
4213 if (info->x_char)
4214 info->x_char = 0;
4215 else
4216 cy_send_xchar(tty, START_CHAR(tty));
4217 }
4218
4219 if (tty->termios->c_cflag & CRTSCTS) {
4220 card = info->card;
4221 channel = info->line - card->first_line;
4222 if (!IS_CYC_Z(*card)) {
4223 chip = channel >> 2;
4224 channel &= 0x03;
4225 index = card->bus_index;
4226 base_addr = card->base_addr +
4227 (cy_chip_offset[chip] << index);
4228
4229 spin_lock_irqsave(&card->card_lock, flags);
4230 cy_writeb(base_addr + (CyCAR << index),
4231 (u_char) channel);
4232 if (info->rtsdtr_inv) {
4233 cy_writeb(base_addr + (CyMSVR2 << index),
4234 CyDTR);
4235 } else {
4236 cy_writeb(base_addr + (CyMSVR1 << index),
4237 CyRTS);
4238 }
4239 spin_unlock_irqrestore(&card->card_lock, flags);
4240 } else {
4241 info->throttle = 0;
4242 }
4243 }
4244 } /* cy_unthrottle */
4245
4246 /* cy_start and cy_stop provide software output flow control as a
4247 function of XON/XOFF, software CTS, and other such stuff.
4248 */
4249 static void cy_stop(struct tty_struct *tty)
4250 {
4251 struct cyclades_card *cinfo;
4252 struct cyclades_port *info = tty->driver_data;
4253 void __iomem *base_addr;
4254 int chip, channel, index;
4255 unsigned long flags;
4256
4257 #ifdef CY_DEBUG_OTHER
4258 printk(KERN_DEBUG "cyc:cy_stop ttyC%d\n", info->line);
4259 #endif
4260
4261 if (serial_paranoia_check(info, tty->name, "cy_stop"))
4262 return;
4263
4264 cinfo = info->card;
4265 channel = info->line - cinfo->first_line;
4266 if (!IS_CYC_Z(*cinfo)) {
4267 index = cinfo->bus_index;
4268 chip = channel >> 2;
4269 channel &= 0x03;
4270 base_addr = cinfo->base_addr + (cy_chip_offset[chip] << index);
4271
4272 spin_lock_irqsave(&cinfo->card_lock, flags);
4273 cy_writeb(base_addr + (CyCAR << index),
4274 (u_char)(channel & 0x0003)); /* index channel */
4275 cy_writeb(base_addr + (CySRER << index),
4276 readb(base_addr + (CySRER << index)) & ~CyTxRdy);
4277 spin_unlock_irqrestore(&cinfo->card_lock, flags);
4278 }
4279 } /* cy_stop */
4280
4281 static void cy_start(struct tty_struct *tty)
4282 {
4283 struct cyclades_card *cinfo;
4284 struct cyclades_port *info = tty->driver_data;
4285 void __iomem *base_addr;
4286 int chip, channel, index;
4287 unsigned long flags;
4288
4289 #ifdef CY_DEBUG_OTHER
4290 printk(KERN_DEBUG "cyc:cy_start ttyC%d\n", info->line);
4291 #endif
4292
4293 if (serial_paranoia_check(info, tty->name, "cy_start"))
4294 return;
4295
4296 cinfo = info->card;
4297 channel = info->line - cinfo->first_line;
4298 index = cinfo->bus_index;
4299 if (!IS_CYC_Z(*cinfo)) {
4300 chip = channel >> 2;
4301 channel &= 0x03;
4302 base_addr = cinfo->base_addr + (cy_chip_offset[chip] << index);
4303
4304 spin_lock_irqsave(&cinfo->card_lock, flags);
4305 cy_writeb(base_addr + (CyCAR << index),
4306 (u_char) (channel & 0x0003)); /* index channel */
4307 cy_writeb(base_addr + (CySRER << index),
4308 readb(base_addr + (CySRER << index)) | CyTxRdy);
4309 spin_unlock_irqrestore(&cinfo->card_lock, flags);
4310 }
4311 } /* cy_start */
4312
4313 /*
4314 * cy_hangup() --- called by tty_hangup() when a hangup is signaled.
4315 */
4316 static void cy_hangup(struct tty_struct *tty)
4317 {
4318 struct cyclades_port *info = tty->driver_data;
4319
4320 #ifdef CY_DEBUG_OTHER
4321 printk(KERN_DEBUG "cyc:cy_hangup ttyC%d\n", info->line);
4322 #endif
4323
4324 if (serial_paranoia_check(info, tty->name, "cy_hangup"))
4325 return;
4326
4327 cy_flush_buffer(tty);
4328 shutdown(info);
4329 info->count = 0;
4330 #ifdef CY_DEBUG_COUNT
4331 printk(KERN_DEBUG "cyc:cy_hangup (%d): setting count to 0\n",
4332 current->pid);
4333 #endif
4334 info->tty = NULL;
4335 info->flags &= ~ASYNC_NORMAL_ACTIVE;
4336 wake_up_interruptible(&info->open_wait);
4337 } /* cy_hangup */
4338
4339 /*
4340 * ---------------------------------------------------------------------
4341 * cy_init() and friends
4342 *
4343 * cy_init() is called at boot-time to initialize the serial driver.
4344 * ---------------------------------------------------------------------
4345 */
4346
4347 static int __devinit cy_init_card(struct cyclades_card *cinfo)
4348 {
4349 struct cyclades_port *info;
4350 u32 uninitialized_var(mailbox);
4351 unsigned int nports, port;
4352 unsigned short chip_number;
4353 int uninitialized_var(index);
4354
4355 spin_lock_init(&cinfo->card_lock);
4356
4357 if (IS_CYC_Z(*cinfo)) { /* Cyclades-Z */
4358 mailbox = readl(&((struct RUNTIME_9060 __iomem *)
4359 cinfo->ctl_addr)->mail_box_0);
4360 nports = (mailbox == ZE_V1) ? ZE_V1_NPORTS : 8;
4361 cinfo->intr_enabled = 0;
4362 cinfo->nports = 0; /* Will be correctly set later, after
4363 Z FW is loaded */
4364 } else {
4365 index = cinfo->bus_index;
4366 nports = cinfo->nports = CyPORTS_PER_CHIP * cinfo->num_chips;
4367 }
4368
4369 cinfo->ports = kzalloc(sizeof(*cinfo->ports) * nports, GFP_KERNEL);
4370 if (cinfo->ports == NULL) {
4371 printk(KERN_ERR "Cyclades: cannot allocate ports\n");
4372 cinfo->nports = 0;
4373 return -ENOMEM;
4374 }
4375
4376 for (port = cinfo->first_line; port < cinfo->first_line + nports;
4377 port++) {
4378 info = &cinfo->ports[port - cinfo->first_line];
4379 info->magic = CYCLADES_MAGIC;
4380 info->card = cinfo;
4381 info->line = port;
4382 info->flags = STD_COM_FLAGS;
4383 info->closing_wait = CLOSING_WAIT_DELAY;
4384 info->close_delay = 5 * HZ / 10;
4385
4386 init_waitqueue_head(&info->open_wait);
4387 init_waitqueue_head(&info->close_wait);
4388 init_completion(&info->shutdown_wait);
4389 init_waitqueue_head(&info->delta_msr_wait);
4390
4391 if (IS_CYC_Z(*cinfo)) {
4392 info->type = PORT_STARTECH;
4393 if (mailbox == ZO_V1)
4394 info->xmit_fifo_size = CYZ_FIFO_SIZE;
4395 else
4396 info->xmit_fifo_size = 4 * CYZ_FIFO_SIZE;
4397 #ifdef CONFIG_CYZ_INTR
4398 setup_timer(&cyz_rx_full_timer[port],
4399 cyz_rx_restart, (unsigned long)info);
4400 #endif
4401 } else {
4402 info->type = PORT_CIRRUS;
4403 info->xmit_fifo_size = CyMAX_CHAR_FIFO;
4404 info->cor1 = CyPARITY_NONE | Cy_1_STOP | Cy_8_BITS;
4405 info->cor2 = CyETC;
4406 info->cor3 = 0x08; /* _very_ small rcv threshold */
4407
4408 chip_number = (port - cinfo->first_line) / 4;
4409 info->chip_rev = readb(cinfo->base_addr +
4410 (cy_chip_offset[chip_number] << index) +
4411 (CyGFRCR << index));
4412
4413 if (info->chip_rev >= CD1400_REV_J) {
4414 /* It is a CD1400 rev. J or later */
4415 info->tbpr = baud_bpr_60[13]; /* Tx BPR */
4416 info->tco = baud_co_60[13]; /* Tx CO */
4417 info->rbpr = baud_bpr_60[13]; /* Rx BPR */
4418 info->rco = baud_co_60[13]; /* Rx CO */
4419 info->rtsdtr_inv = 1;
4420 } else {
4421 info->tbpr = baud_bpr_25[13]; /* Tx BPR */
4422 info->tco = baud_co_25[13]; /* Tx CO */
4423 info->rbpr = baud_bpr_25[13]; /* Rx BPR */
4424 info->rco = baud_co_25[13]; /* Rx CO */
4425 info->rtsdtr_inv = 0;
4426 }
4427 info->read_status_mask = CyTIMEOUT | CySPECHAR |
4428 CyBREAK | CyPARITY | CyFRAME | CyOVERRUN;
4429 }
4430
4431 }
4432
4433 #ifndef CONFIG_CYZ_INTR
4434 if (IS_CYC_Z(*cinfo) && !timer_pending(&cyz_timerlist)) {
4435 mod_timer(&cyz_timerlist, jiffies + 1);
4436 #ifdef CY_PCI_DEBUG
4437 printk(KERN_DEBUG "Cyclades-Z polling initialized\n");
4438 #endif
4439 }
4440 #endif
4441 return 0;
4442 }
4443
4444 /* initialize chips on Cyclom-Y card -- return number of valid
4445 chips (which is number of ports/4) */
4446 static unsigned short __devinit cyy_init_card(void __iomem *true_base_addr,
4447 int index)
4448 {
4449 unsigned int chip_number;
4450 void __iomem *base_addr;
4451
4452 cy_writeb(true_base_addr + (Cy_HwReset << index), 0);
4453 /* Cy_HwReset is 0x1400 */
4454 cy_writeb(true_base_addr + (Cy_ClrIntr << index), 0);
4455 /* Cy_ClrIntr is 0x1800 */
4456 udelay(500L);
4457
4458 for (chip_number = 0; chip_number < CyMAX_CHIPS_PER_CARD;
4459 chip_number++) {
4460 base_addr =
4461 true_base_addr + (cy_chip_offset[chip_number] << index);
4462 mdelay(1);
4463 if (readb(base_addr + (CyCCR << index)) != 0x00) {
4464 /*************
4465 printk(" chip #%d at %#6lx is never idle (CCR != 0)\n",
4466 chip_number, (unsigned long)base_addr);
4467 *************/
4468 return chip_number;
4469 }
4470
4471 cy_writeb(base_addr + (CyGFRCR << index), 0);
4472 udelay(10L);
4473
4474 /* The Cyclom-16Y does not decode address bit 9 and therefore
4475 cannot distinguish between references to chip 0 and a non-
4476 existent chip 4. If the preceding clearing of the supposed
4477 chip 4 GFRCR register appears at chip 0, there is no chip 4
4478 and this must be a Cyclom-16Y, not a Cyclom-32Ye.
4479 */
4480 if (chip_number == 4 && readb(true_base_addr +
4481 (cy_chip_offset[0] << index) +
4482 (CyGFRCR << index)) == 0) {
4483 return chip_number;
4484 }
4485
4486 cy_writeb(base_addr + (CyCCR << index), CyCHIP_RESET);
4487 mdelay(1);
4488
4489 if (readb(base_addr + (CyGFRCR << index)) == 0x00) {
4490 /*
4491 printk(" chip #%d at %#6lx is not responding ",
4492 chip_number, (unsigned long)base_addr);
4493 printk("(GFRCR stayed 0)\n",
4494 */
4495 return chip_number;
4496 }
4497 if ((0xf0 & (readb(base_addr + (CyGFRCR << index)))) !=
4498 0x40) {
4499 /*
4500 printk(" chip #%d at %#6lx is not valid (GFRCR == "
4501 "%#2x)\n",
4502 chip_number, (unsigned long)base_addr,
4503 base_addr[CyGFRCR<<index]);
4504 */
4505 return chip_number;
4506 }
4507 cy_writeb(base_addr + (CyGCR << index), CyCH0_SERIAL);
4508 if (readb(base_addr + (CyGFRCR << index)) >= CD1400_REV_J) {
4509 /* It is a CD1400 rev. J or later */
4510 /* Impossible to reach 5ms with this chip.
4511 Changed to 2ms instead (f = 500 Hz). */
4512 cy_writeb(base_addr + (CyPPR << index), CyCLOCK_60_2MS);
4513 } else {
4514 /* f = 200 Hz */
4515 cy_writeb(base_addr + (CyPPR << index), CyCLOCK_25_5MS);
4516 }
4517
4518 /*
4519 printk(" chip #%d at %#6lx is rev 0x%2x\n",
4520 chip_number, (unsigned long)base_addr,
4521 readb(base_addr+(CyGFRCR<<index)));
4522 */
4523 }
4524 return chip_number;
4525 } /* cyy_init_card */
4526
4527 /*
4528 * ---------------------------------------------------------------------
4529 * cy_detect_isa() - Probe for Cyclom-Y/ISA boards.
4530 * sets global variables and return the number of ISA boards found.
4531 * ---------------------------------------------------------------------
4532 */
4533 static int __init cy_detect_isa(void)
4534 {
4535 #ifdef CONFIG_ISA
4536 unsigned short cy_isa_irq, nboard;
4537 void __iomem *cy_isa_address;
4538 unsigned short i, j, cy_isa_nchan;
4539 #ifdef MODULE
4540 int isparam = 0;
4541 #endif
4542
4543 nboard = 0;
4544
4545 #ifdef MODULE
4546 /* Check for module parameters */
4547 for (i = 0; i < NR_CARDS; i++) {
4548 if (maddr[i] || i) {
4549 isparam = 1;
4550 cy_isa_addresses[i] = maddr[i];
4551 }
4552 if (!maddr[i])
4553 break;
4554 }
4555 #endif
4556
4557 /* scan the address table probing for Cyclom-Y/ISA boards */
4558 for (i = 0; i < NR_ISA_ADDRS; i++) {
4559 unsigned int isa_address = cy_isa_addresses[i];
4560 if (isa_address == 0x0000)
4561 return nboard;
4562
4563 /* probe for CD1400... */
4564 cy_isa_address = ioremap_nocache(isa_address, CyISA_Ywin);
4565 if (cy_isa_address == NULL) {
4566 printk(KERN_ERR "Cyclom-Y/ISA: can't remap base "
4567 "address\n");
4568 continue;
4569 }
4570 cy_isa_nchan = CyPORTS_PER_CHIP *
4571 cyy_init_card(cy_isa_address, 0);
4572 if (cy_isa_nchan == 0) {
4573 iounmap(cy_isa_address);
4574 continue;
4575 }
4576 #ifdef MODULE
4577 if (isparam && irq[i])
4578 cy_isa_irq = irq[i];
4579 else
4580 #endif
4581 /* find out the board's irq by probing */
4582 cy_isa_irq = detect_isa_irq(cy_isa_address);
4583 if (cy_isa_irq == 0) {
4584 printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but the "
4585 "IRQ could not be detected.\n",
4586 (unsigned long)cy_isa_address);
4587 iounmap(cy_isa_address);
4588 continue;
4589 }
4590
4591 if ((cy_next_channel + cy_isa_nchan) > NR_PORTS) {
4592 printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but no "
4593 "more channels are available. Change NR_PORTS "
4594 "in cyclades.c and recompile kernel.\n",
4595 (unsigned long)cy_isa_address);
4596 iounmap(cy_isa_address);
4597 return nboard;
4598 }
4599 /* fill the next cy_card structure available */
4600 for (j = 0; j < NR_CARDS; j++) {
4601 if (cy_card[j].base_addr == NULL)
4602 break;
4603 }
4604 if (j == NR_CARDS) { /* no more cy_cards available */
4605 printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but no "
4606 "more cards can be used. Change NR_CARDS in "
4607 "cyclades.c and recompile kernel.\n",
4608 (unsigned long)cy_isa_address);
4609 iounmap(cy_isa_address);
4610 return nboard;
4611 }
4612
4613 /* allocate IRQ */
4614 if (request_irq(cy_isa_irq, cyy_interrupt,
4615 IRQF_DISABLED, "Cyclom-Y", &cy_card[j])) {
4616 printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but "
4617 "could not allocate IRQ#%d.\n",
4618 (unsigned long)cy_isa_address, cy_isa_irq);
4619 iounmap(cy_isa_address);
4620 return nboard;
4621 }
4622
4623 /* set cy_card */
4624 cy_card[j].base_addr = cy_isa_address;
4625 cy_card[j].ctl_addr = NULL;
4626 cy_card[j].irq = (int)cy_isa_irq;
4627 cy_card[j].bus_index = 0;
4628 cy_card[j].first_line = cy_next_channel;
4629 cy_card[j].num_chips = cy_isa_nchan / 4;
4630 if (cy_init_card(&cy_card[j])) {
4631 cy_card[j].base_addr = NULL;
4632 free_irq(cy_isa_irq, &cy_card[j]);
4633 iounmap(cy_isa_address);
4634 continue;
4635 }
4636 nboard++;
4637
4638 printk(KERN_INFO "Cyclom-Y/ISA #%d: 0x%lx-0x%lx, IRQ%d found: "
4639 "%d channels starting from port %d\n",
4640 j + 1, (unsigned long)cy_isa_address,
4641 (unsigned long)(cy_isa_address + (CyISA_Ywin - 1)),
4642 cy_isa_irq, cy_isa_nchan, cy_next_channel);
4643
4644 for (j = cy_next_channel;
4645 j < cy_next_channel + cy_isa_nchan; j++)
4646 tty_register_device(cy_serial_driver, j, NULL);
4647 cy_next_channel += cy_isa_nchan;
4648 }
4649 return nboard;
4650 #else
4651 return 0;
4652 #endif /* CONFIG_ISA */
4653 } /* cy_detect_isa */
4654
4655 #ifdef CONFIG_PCI
4656 static inline int __devinit cyc_isfwstr(const char *str, unsigned int size)
4657 {
4658 unsigned int a;
4659
4660 for (a = 0; a < size && *str; a++, str++)
4661 if (*str & 0x80)
4662 return -EINVAL;
4663
4664 for (; a < size; a++, str++)
4665 if (*str)
4666 return -EINVAL;
4667
4668 return 0;
4669 }
4670
4671 static inline void __devinit cyz_fpga_copy(void __iomem *fpga, const u8 *data,
4672 unsigned int size)
4673 {
4674 for (; size > 0; size--) {
4675 cy_writel(fpga, *data++);
4676 udelay(10);
4677 }
4678 }
4679
4680 static void __devinit plx_init(struct pci_dev *pdev, int irq,
4681 struct RUNTIME_9060 __iomem *addr)
4682 {
4683 /* Reset PLX */
4684 cy_writel(&addr->init_ctrl, readl(&addr->init_ctrl) | 0x40000000);
4685 udelay(100L);
4686 cy_writel(&addr->init_ctrl, readl(&addr->init_ctrl) & ~0x40000000);
4687
4688 /* Reload Config. Registers from EEPROM */
4689 cy_writel(&addr->init_ctrl, readl(&addr->init_ctrl) | 0x20000000);
4690 udelay(100L);
4691 cy_writel(&addr->init_ctrl, readl(&addr->init_ctrl) & ~0x20000000);
4692
4693 /* For some yet unknown reason, once the PLX9060 reloads the EEPROM,
4694 * the IRQ is lost and, thus, we have to re-write it to the PCI config.
4695 * registers. This will remain here until we find a permanent fix.
4696 */
4697 pci_write_config_byte(pdev, PCI_INTERRUPT_LINE, irq);
4698 }
4699
4700 static int __devinit __cyz_load_fw(const struct firmware *fw,
4701 const char *name, const u32 mailbox, void __iomem *base,
4702 void __iomem *fpga)
4703 {
4704 const void *ptr = fw->data;
4705 const struct zfile_header *h = ptr;
4706 const struct zfile_config *c, *cs;
4707 const struct zfile_block *b, *bs;
4708 unsigned int a, tmp, len = fw->size;
4709 #define BAD_FW KERN_ERR "Bad firmware: "
4710 if (len < sizeof(*h)) {
4711 printk(BAD_FW "too short: %u<%zu\n", len, sizeof(*h));
4712 return -EINVAL;
4713 }
4714
4715 cs = ptr + h->config_offset;
4716 bs = ptr + h->block_offset;
4717
4718 if ((void *)(cs + h->n_config) > ptr + len ||
4719 (void *)(bs + h->n_blocks) > ptr + len) {
4720 printk(BAD_FW "too short");
4721 return -EINVAL;
4722 }
4723
4724 if (cyc_isfwstr(h->name, sizeof(h->name)) ||
4725 cyc_isfwstr(h->date, sizeof(h->date))) {
4726 printk(BAD_FW "bad formatted header string\n");
4727 return -EINVAL;
4728 }
4729
4730 if (strncmp(name, h->name, sizeof(h->name))) {
4731 printk(BAD_FW "bad name '%s' (expected '%s')\n", h->name, name);
4732 return -EINVAL;
4733 }
4734
4735 tmp = 0;
4736 for (c = cs; c < cs + h->n_config; c++) {
4737 for (a = 0; a < c->n_blocks; a++)
4738 if (c->block_list[a] > h->n_blocks) {
4739 printk(BAD_FW "bad block ref number in cfgs\n");
4740 return -EINVAL;
4741 }
4742 if (c->mailbox == mailbox && c->function == 0) /* 0 is normal */
4743 tmp++;
4744 }
4745 if (!tmp) {
4746 printk(BAD_FW "nothing appropriate\n");
4747 return -EINVAL;
4748 }
4749
4750 for (b = bs; b < bs + h->n_blocks; b++)
4751 if (b->file_offset + b->size > len) {
4752 printk(BAD_FW "bad block data offset\n");
4753 return -EINVAL;
4754 }
4755
4756 /* everything is OK, let's seek'n'load it */
4757 for (c = cs; c < cs + h->n_config; c++)
4758 if (c->mailbox == mailbox && c->function == 0)
4759 break;
4760
4761 for (a = 0; a < c->n_blocks; a++) {
4762 b = &bs[c->block_list[a]];
4763 if (b->type == ZBLOCK_FPGA) {
4764 if (fpga != NULL)
4765 cyz_fpga_copy(fpga, ptr + b->file_offset,
4766 b->size);
4767 } else {
4768 if (base != NULL)
4769 memcpy_toio(base + b->ram_offset,
4770 ptr + b->file_offset, b->size);
4771 }
4772 }
4773 #undef BAD_FW
4774 return 0;
4775 }
4776
4777 static int __devinit cyz_load_fw(struct pci_dev *pdev, void __iomem *base_addr,
4778 struct RUNTIME_9060 __iomem *ctl_addr, int irq)
4779 {
4780 const struct firmware *fw;
4781 struct FIRM_ID __iomem *fid = base_addr + ID_ADDRESS;
4782 struct CUSTOM_REG __iomem *cust = base_addr;
4783 struct ZFW_CTRL __iomem *pt_zfwctrl;
4784 void __iomem *tmp;
4785 u32 mailbox, status;
4786 unsigned int i;
4787 int retval;
4788
4789 retval = request_firmware(&fw, "cyzfirm.bin", &pdev->dev);
4790 if (retval) {
4791 dev_err(&pdev->dev, "can't get firmware\n");
4792 goto err;
4793 }
4794
4795 /* Check whether the firmware is already loaded and running. If
4796 positive, skip this board */
4797 if (Z_FPGA_LOADED(ctl_addr) && readl(&fid->signature) == ZFIRM_ID) {
4798 u32 cntval = readl(base_addr + 0x190);
4799
4800 udelay(100);
4801 if (cntval != readl(base_addr + 0x190)) {
4802 /* FW counter is working, FW is running */
4803 dev_dbg(&pdev->dev, "Cyclades-Z FW already loaded. "
4804 "Skipping board.\n");
4805 retval = 0;
4806 goto err_rel;
4807 }
4808 }
4809
4810 /* start boot */
4811 cy_writel(&ctl_addr->intr_ctrl_stat, readl(&ctl_addr->intr_ctrl_stat) &
4812 ~0x00030800UL);
4813
4814 mailbox = readl(&ctl_addr->mail_box_0);
4815
4816 if (mailbox == 0 || Z_FPGA_LOADED(ctl_addr)) {
4817 /* stops CPU and set window to beginning of RAM */
4818 cy_writel(&ctl_addr->loc_addr_base, WIN_CREG);
4819 cy_writel(&cust->cpu_stop, 0);
4820 cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
4821 udelay(100);
4822 }
4823
4824 plx_init(pdev, irq, ctl_addr);
4825
4826 if (mailbox != 0) {
4827 /* load FPGA */
4828 retval = __cyz_load_fw(fw, "Cyclom-Z", mailbox, NULL,
4829 base_addr);
4830 if (retval)
4831 goto err_rel;
4832 if (!Z_FPGA_LOADED(ctl_addr)) {
4833 dev_err(&pdev->dev, "fw upload successful, but fw is "
4834 "not loaded\n");
4835 goto err_rel;
4836 }
4837 }
4838
4839 /* stops CPU and set window to beginning of RAM */
4840 cy_writel(&ctl_addr->loc_addr_base, WIN_CREG);
4841 cy_writel(&cust->cpu_stop, 0);
4842 cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
4843 udelay(100);
4844
4845 /* clear memory */
4846 for (tmp = base_addr; tmp < base_addr + RAM_SIZE; tmp++)
4847 cy_writeb(tmp, 255);
4848 if (mailbox != 0) {
4849 /* set window to last 512K of RAM */
4850 cy_writel(&ctl_addr->loc_addr_base, WIN_RAM + RAM_SIZE);
4851 for (tmp = base_addr; tmp < base_addr + RAM_SIZE; tmp++)
4852 cy_writeb(tmp, 255);
4853 /* set window to beginning of RAM */
4854 cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
4855 }
4856
4857 retval = __cyz_load_fw(fw, "Cyclom-Z", mailbox, base_addr, NULL);
4858 release_firmware(fw);
4859 if (retval)
4860 goto err;
4861
4862 /* finish boot and start boards */
4863 cy_writel(&ctl_addr->loc_addr_base, WIN_CREG);
4864 cy_writel(&cust->cpu_start, 0);
4865 cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
4866 i = 0;
4867 while ((status = readl(&fid->signature)) != ZFIRM_ID && i++ < 40)
4868 msleep(100);
4869 if (status != ZFIRM_ID) {
4870 if (status == ZFIRM_HLT) {
4871 dev_err(&pdev->dev, "you need an external power supply "
4872 "for this number of ports. Firmware halted and "
4873 "board reset.\n");
4874 retval = -EIO;
4875 goto err;
4876 }
4877 dev_warn(&pdev->dev, "fid->signature = 0x%x... Waiting "
4878 "some more time\n", status);
4879 while ((status = readl(&fid->signature)) != ZFIRM_ID &&
4880 i++ < 200)
4881 msleep(100);
4882 if (status != ZFIRM_ID) {
4883 dev_err(&pdev->dev, "Board not started in 20 seconds! "
4884 "Giving up. (fid->signature = 0x%x)\n",
4885 status);
4886 dev_info(&pdev->dev, "*** Warning ***: if you are "
4887 "upgrading the FW, please power cycle the "
4888 "system before loading the new FW to the "
4889 "Cyclades-Z.\n");
4890
4891 if (Z_FPGA_LOADED(ctl_addr))
4892 plx_init(pdev, irq, ctl_addr);
4893
4894 retval = -EIO;
4895 goto err;
4896 }
4897 dev_dbg(&pdev->dev, "Firmware started after %d seconds.\n",
4898 i / 10);
4899 }
4900 pt_zfwctrl = base_addr + readl(&fid->zfwctrl_addr);
4901
4902 dev_dbg(&pdev->dev, "fid=> %p, zfwctrl_addr=> %x, npt_zfwctrl=> %p\n",
4903 base_addr + ID_ADDRESS, readl(&fid->zfwctrl_addr),
4904 base_addr + readl(&fid->zfwctrl_addr));
4905
4906 dev_info(&pdev->dev, "Cyclades-Z FW loaded: version = %x, ports = %u\n",
4907 readl(&pt_zfwctrl->board_ctrl.fw_version),
4908 readl(&pt_zfwctrl->board_ctrl.n_channel));
4909
4910 if (readl(&pt_zfwctrl->board_ctrl.n_channel) == 0) {
4911 dev_warn(&pdev->dev, "no Cyclades-Z ports were found. Please "
4912 "check the connection between the Z host card and the "
4913 "serial expanders.\n");
4914
4915 if (Z_FPGA_LOADED(ctl_addr))
4916 plx_init(pdev, irq, ctl_addr);
4917
4918 dev_info(&pdev->dev, "Null number of ports detected. Board "
4919 "reset.\n");
4920 retval = 0;
4921 goto err;
4922 }
4923
4924 cy_writel(&pt_zfwctrl->board_ctrl.op_system, C_OS_LINUX);
4925 cy_writel(&pt_zfwctrl->board_ctrl.dr_version, DRIVER_VERSION);
4926
4927 /*
4928 Early firmware failed to start looking for commands.
4929 This enables firmware interrupts for those commands.
4930 */
4931 cy_writel(&ctl_addr->intr_ctrl_stat, readl(&ctl_addr->intr_ctrl_stat) |
4932 (1 << 17));
4933 cy_writel(&ctl_addr->intr_ctrl_stat, readl(&ctl_addr->intr_ctrl_stat) |
4934 0x00030800UL);
4935
4936 plx_init(pdev, irq, ctl_addr);
4937
4938 return 0;
4939 err_rel:
4940 release_firmware(fw);
4941 err:
4942 return retval;
4943 }
4944
4945 static int __devinit cy_pci_probe(struct pci_dev *pdev,
4946 const struct pci_device_id *ent)
4947 {
4948 void __iomem *addr0 = NULL, *addr2 = NULL;
4949 char *card_name = NULL;
4950 u32 mailbox;
4951 unsigned int device_id, nchan = 0, card_no, i;
4952 unsigned char plx_ver;
4953 int retval, irq;
4954
4955 retval = pci_enable_device(pdev);
4956 if (retval) {
4957 dev_err(&pdev->dev, "cannot enable device\n");
4958 goto err;
4959 }
4960
4961 /* read PCI configuration area */
4962 irq = pdev->irq;
4963 device_id = pdev->device & ~PCI_DEVICE_ID_MASK;
4964
4965 #if defined(__alpha__)
4966 if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo) { /* below 1M? */
4967 dev_err(&pdev->dev, "Cyclom-Y/PCI not supported for low "
4968 "addresses on Alpha systems.\n");
4969 retval = -EIO;
4970 goto err_dis;
4971 }
4972 #endif
4973 if (device_id == PCI_DEVICE_ID_CYCLOM_Z_Lo) {
4974 dev_err(&pdev->dev, "Cyclades-Z/PCI not supported for low "
4975 "addresses\n");
4976 retval = -EIO;
4977 goto err_dis;
4978 }
4979
4980 if (pci_resource_flags(pdev, 2) & IORESOURCE_IO) {
4981 dev_warn(&pdev->dev, "PCI I/O bit incorrectly set. Ignoring "
4982 "it...\n");
4983 pdev->resource[2].flags &= ~IORESOURCE_IO;
4984 }
4985
4986 retval = pci_request_regions(pdev, "cyclades");
4987 if (retval) {
4988 dev_err(&pdev->dev, "failed to reserve resources\n");
4989 goto err_dis;
4990 }
4991
4992 retval = -EIO;
4993 if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo ||
4994 device_id == PCI_DEVICE_ID_CYCLOM_Y_Hi) {
4995 card_name = "Cyclom-Y";
4996
4997 addr0 = pci_iomap(pdev, 0, CyPCI_Yctl);
4998 if (addr0 == NULL) {
4999 dev_err(&pdev->dev, "can't remap ctl region\n");
5000 goto err_reg;
5001 }
5002 addr2 = pci_iomap(pdev, 2, CyPCI_Ywin);
5003 if (addr2 == NULL) {
5004 dev_err(&pdev->dev, "can't remap base region\n");
5005 goto err_unmap;
5006 }
5007
5008 nchan = CyPORTS_PER_CHIP * cyy_init_card(addr2, 1);
5009 if (nchan == 0) {
5010 dev_err(&pdev->dev, "Cyclom-Y PCI host card with no "
5011 "Serial-Modules\n");
5012 return -EIO;
5013 }
5014 } else if (device_id == PCI_DEVICE_ID_CYCLOM_Z_Hi) {
5015 struct RUNTIME_9060 __iomem *ctl_addr;
5016
5017 ctl_addr = addr0 = pci_iomap(pdev, 0, CyPCI_Zctl);
5018 if (addr0 == NULL) {
5019 dev_err(&pdev->dev, "can't remap ctl region\n");
5020 goto err_reg;
5021 }
5022
5023 /* Disable interrupts on the PLX before resetting it */
5024 cy_writew(addr0 + 0x68, readw(addr0 + 0x68) & ~0x0900);
5025
5026 plx_init(pdev, irq, addr0);
5027
5028 mailbox = (u32)readl(&ctl_addr->mail_box_0);
5029
5030 addr2 = pci_iomap(pdev, 2, mailbox == ZE_V1 ?
5031 CyPCI_Ze_win : CyPCI_Zwin);
5032 if (addr2 == NULL) {
5033 dev_err(&pdev->dev, "can't remap base region\n");
5034 goto err_unmap;
5035 }
5036
5037 if (mailbox == ZE_V1) {
5038 card_name = "Cyclades-Ze";
5039
5040 readl(&ctl_addr->mail_box_0);
5041 nchan = ZE_V1_NPORTS;
5042 } else {
5043 card_name = "Cyclades-8Zo";
5044
5045 #ifdef CY_PCI_DEBUG
5046 if (mailbox == ZO_V1) {
5047 cy_writel(&ctl_addr->loc_addr_base, WIN_CREG);
5048 dev_info(&pdev->dev, "Cyclades-8Zo/PCI: FPGA "
5049 "id %lx, ver %lx\n", (ulong)(0xff &
5050 readl(&((struct CUSTOM_REG *)addr2)->
5051 fpga_id)), (ulong)(0xff &
5052 readl(&((struct CUSTOM_REG *)addr2)->
5053 fpga_version)));
5054 cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
5055 } else {
5056 dev_info(&pdev->dev, "Cyclades-Z/PCI: New "
5057 "Cyclades-Z board. FPGA not loaded\n");
5058 }
5059 #endif
5060 /* The following clears the firmware id word. This
5061 ensures that the driver will not attempt to talk to
5062 the board until it has been properly initialized.
5063 */
5064 if ((mailbox == ZO_V1) || (mailbox == ZO_V2))
5065 cy_writel(addr2 + ID_ADDRESS, 0L);
5066
5067 retval = cyz_load_fw(pdev, addr2, addr0, irq);
5068 if (retval)
5069 goto err_unmap;
5070 /* This must be a Cyclades-8Zo/PCI. The extendable
5071 version will have a different device_id and will
5072 be allocated its maximum number of ports. */
5073 nchan = 8;
5074 }
5075 }
5076
5077 if ((cy_next_channel + nchan) > NR_PORTS) {
5078 dev_err(&pdev->dev, "Cyclades-8Zo/PCI found, but no "
5079 "channels are available. Change NR_PORTS in "
5080 "cyclades.c and recompile kernel.\n");
5081 goto err_unmap;
5082 }
5083 /* fill the next cy_card structure available */
5084 for (card_no = 0; card_no < NR_CARDS; card_no++) {
5085 if (cy_card[card_no].base_addr == NULL)
5086 break;
5087 }
5088 if (card_no == NR_CARDS) { /* no more cy_cards available */
5089 dev_err(&pdev->dev, "Cyclades-8Zo/PCI found, but no "
5090 "more cards can be used. Change NR_CARDS in "
5091 "cyclades.c and recompile kernel.\n");
5092 goto err_unmap;
5093 }
5094
5095 if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo ||
5096 device_id == PCI_DEVICE_ID_CYCLOM_Y_Hi) {
5097 /* allocate IRQ */
5098 retval = request_irq(irq, cyy_interrupt,
5099 IRQF_SHARED, "Cyclom-Y", &cy_card[card_no]);
5100 if (retval) {
5101 dev_err(&pdev->dev, "could not allocate IRQ\n");
5102 goto err_unmap;
5103 }
5104 cy_card[card_no].num_chips = nchan / 4;
5105 } else {
5106 #ifdef CONFIG_CYZ_INTR
5107 /* allocate IRQ only if board has an IRQ */
5108 if (irq != 0 && irq != 255) {
5109 retval = request_irq(irq, cyz_interrupt,
5110 IRQF_SHARED, "Cyclades-Z",
5111 &cy_card[card_no]);
5112 if (retval) {
5113 dev_err(&pdev->dev, "could not allocate IRQ\n");
5114 goto err_unmap;
5115 }
5116 }
5117 #endif /* CONFIG_CYZ_INTR */
5118 cy_card[card_no].num_chips = (unsigned int)-1;
5119 }
5120
5121 /* set cy_card */
5122 cy_card[card_no].base_addr = addr2;
5123 cy_card[card_no].ctl_addr = addr0;
5124 cy_card[card_no].irq = irq;
5125 cy_card[card_no].bus_index = 1;
5126 cy_card[card_no].first_line = cy_next_channel;
5127 retval = cy_init_card(&cy_card[card_no]);
5128 if (retval)
5129 goto err_null;
5130
5131 pci_set_drvdata(pdev, &cy_card[card_no]);
5132
5133 if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo ||
5134 device_id == PCI_DEVICE_ID_CYCLOM_Y_Hi) {
5135 /* enable interrupts in the PCI interface */
5136 plx_ver = readb(addr2 + CyPLX_VER) & 0x0f;
5137 switch (plx_ver) {
5138 case PLX_9050:
5139
5140 cy_writeb(addr0 + 0x4c, 0x43);
5141 break;
5142
5143 case PLX_9060:
5144 case PLX_9080:
5145 default: /* Old boards, use PLX_9060 */
5146 plx_init(pdev, irq, addr0);
5147 cy_writew(addr0 + 0x68, readw(addr0 + 0x68) | 0x0900);
5148 break;
5149 }
5150 }
5151
5152 dev_info(&pdev->dev, "%s/PCI #%d found: %d channels starting from "
5153 "port %d.\n", card_name, card_no + 1, nchan, cy_next_channel);
5154 for (i = cy_next_channel; i < cy_next_channel + nchan; i++)
5155 tty_register_device(cy_serial_driver, i, &pdev->dev);
5156 cy_next_channel += nchan;
5157
5158 return 0;
5159 err_null:
5160 cy_card[card_no].base_addr = NULL;
5161 free_irq(irq, &cy_card[card_no]);
5162 err_unmap:
5163 pci_iounmap(pdev, addr0);
5164 if (addr2)
5165 pci_iounmap(pdev, addr2);
5166 err_reg:
5167 pci_release_regions(pdev);
5168 err_dis:
5169 pci_disable_device(pdev);
5170 err:
5171 return retval;
5172 }
5173
5174 static void __devexit cy_pci_remove(struct pci_dev *pdev)
5175 {
5176 struct cyclades_card *cinfo = pci_get_drvdata(pdev);
5177 unsigned int i;
5178
5179 /* non-Z with old PLX */
5180 if (!IS_CYC_Z(*cinfo) && (readb(cinfo->base_addr + CyPLX_VER) & 0x0f) ==
5181 PLX_9050)
5182 cy_writeb(cinfo->ctl_addr + 0x4c, 0);
5183 else
5184 #ifndef CONFIG_CYZ_INTR
5185 if (!IS_CYC_Z(*cinfo))
5186 #endif
5187 cy_writew(cinfo->ctl_addr + 0x68,
5188 readw(cinfo->ctl_addr + 0x68) & ~0x0900);
5189
5190 pci_iounmap(pdev, cinfo->base_addr);
5191 if (cinfo->ctl_addr)
5192 pci_iounmap(pdev, cinfo->ctl_addr);
5193 if (cinfo->irq
5194 #ifndef CONFIG_CYZ_INTR
5195 && !IS_CYC_Z(*cinfo)
5196 #endif /* CONFIG_CYZ_INTR */
5197 )
5198 free_irq(cinfo->irq, cinfo);
5199 pci_release_regions(pdev);
5200
5201 cinfo->base_addr = NULL;
5202 for (i = cinfo->first_line; i < cinfo->first_line +
5203 cinfo->nports; i++)
5204 tty_unregister_device(cy_serial_driver, i);
5205 cinfo->nports = 0;
5206 kfree(cinfo->ports);
5207 }
5208
5209 static struct pci_driver cy_pci_driver = {
5210 .name = "cyclades",
5211 .id_table = cy_pci_dev_id,
5212 .probe = cy_pci_probe,
5213 .remove = __devexit_p(cy_pci_remove)
5214 };
5215 #endif
5216
5217 static int
5218 cyclades_get_proc_info(char *buf, char **start, off_t offset, int length,
5219 int *eof, void *data)
5220 {
5221 struct cyclades_port *info;
5222 unsigned int i, j;
5223 int len = 0;
5224 off_t begin = 0;
5225 off_t pos = 0;
5226 int size;
5227 __u32 cur_jifs = jiffies;
5228
5229 size = sprintf(buf, "Dev TimeOpen BytesOut IdleOut BytesIn "
5230 "IdleIn Overruns Ldisc\n");
5231
5232 pos += size;
5233 len += size;
5234
5235 /* Output one line for each known port */
5236 for (i = 0; i < NR_CARDS; i++)
5237 for (j = 0; j < cy_card[i].nports; j++) {
5238 info = &cy_card[i].ports[j];
5239
5240 if (info->count)
5241 size = sprintf(buf + len, "%3d %8lu %10lu %8lu "
5242 "%10lu %8lu %9lu %6ld\n", info->line,
5243 (cur_jifs - info->idle_stats.in_use) /
5244 HZ, info->idle_stats.xmit_bytes,
5245 (cur_jifs - info->idle_stats.xmit_idle)/
5246 HZ, info->idle_stats.recv_bytes,
5247 (cur_jifs - info->idle_stats.recv_idle)/
5248 HZ, info->idle_stats.overruns,
5249 (long)info->tty->ldisc.num);
5250 else
5251 size = sprintf(buf + len, "%3d %8lu %10lu %8lu "
5252 "%10lu %8lu %9lu %6ld\n",
5253 info->line, 0L, 0L, 0L, 0L, 0L, 0L, 0L);
5254 len += size;
5255 pos = begin + len;
5256
5257 if (pos < offset) {
5258 len = 0;
5259 begin = pos;
5260 }
5261 if (pos > offset + length)
5262 goto done;
5263 }
5264 *eof = 1;
5265 done:
5266 *start = buf + (offset - begin); /* Start of wanted data */
5267 len -= (offset - begin); /* Start slop */
5268 if (len > length)
5269 len = length; /* Ending slop */
5270 if (len < 0)
5271 len = 0;
5272 return len;
5273 }
5274
5275 /* The serial driver boot-time initialization code!
5276 Hardware I/O ports are mapped to character special devices on a
5277 first found, first allocated manner. That is, this code searches
5278 for Cyclom cards in the system. As each is found, it is probed
5279 to discover how many chips (and thus how many ports) are present.
5280 These ports are mapped to the tty ports 32 and upward in monotonic
5281 fashion. If an 8-port card is replaced with a 16-port card, the
5282 port mapping on a following card will shift.
5283
5284 This approach is different from what is used in the other serial
5285 device driver because the Cyclom is more properly a multiplexer,
5286 not just an aggregation of serial ports on one card.
5287
5288 If there are more cards with more ports than have been
5289 statically allocated above, a warning is printed and the
5290 extra ports are ignored.
5291 */
5292
5293 static const struct tty_operations cy_ops = {
5294 .open = cy_open,
5295 .close = cy_close,
5296 .write = cy_write,
5297 .put_char = cy_put_char,
5298 .flush_chars = cy_flush_chars,
5299 .write_room = cy_write_room,
5300 .chars_in_buffer = cy_chars_in_buffer,
5301 .flush_buffer = cy_flush_buffer,
5302 .ioctl = cy_ioctl,
5303 .throttle = cy_throttle,
5304 .unthrottle = cy_unthrottle,
5305 .set_termios = cy_set_termios,
5306 .stop = cy_stop,
5307 .start = cy_start,
5308 .hangup = cy_hangup,
5309 .break_ctl = cy_break,
5310 .wait_until_sent = cy_wait_until_sent,
5311 .read_proc = cyclades_get_proc_info,
5312 .tiocmget = cy_tiocmget,
5313 .tiocmset = cy_tiocmset,
5314 };
5315
5316 static int __init cy_init(void)
5317 {
5318 unsigned int nboards;
5319 int retval = -ENOMEM;
5320
5321 cy_serial_driver = alloc_tty_driver(NR_PORTS);
5322 if (!cy_serial_driver)
5323 goto err;
5324
5325 printk(KERN_INFO "Cyclades driver " CY_VERSION " (built %s %s)\n",
5326 __DATE__, __TIME__);
5327
5328 /* Initialize the tty_driver structure */
5329
5330 cy_serial_driver->owner = THIS_MODULE;
5331 cy_serial_driver->driver_name = "cyclades";
5332 cy_serial_driver->name = "ttyC";
5333 cy_serial_driver->major = CYCLADES_MAJOR;
5334 cy_serial_driver->minor_start = 0;
5335 cy_serial_driver->type = TTY_DRIVER_TYPE_SERIAL;
5336 cy_serial_driver->subtype = SERIAL_TYPE_NORMAL;
5337 cy_serial_driver->init_termios = tty_std_termios;
5338 cy_serial_driver->init_termios.c_cflag =
5339 B9600 | CS8 | CREAD | HUPCL | CLOCAL;
5340 cy_serial_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
5341 tty_set_operations(cy_serial_driver, &cy_ops);
5342
5343 retval = tty_register_driver(cy_serial_driver);
5344 if (retval) {
5345 printk(KERN_ERR "Couldn't register Cyclades serial driver\n");
5346 goto err_frtty;
5347 }
5348
5349 /* the code below is responsible to find the boards. Each different
5350 type of board has its own detection routine. If a board is found,
5351 the next cy_card structure available is set by the detection
5352 routine. These functions are responsible for checking the
5353 availability of cy_card and cy_port data structures and updating
5354 the cy_next_channel. */
5355
5356 /* look for isa boards */
5357 nboards = cy_detect_isa();
5358
5359 #ifdef CONFIG_PCI
5360 /* look for pci boards */
5361 retval = pci_register_driver(&cy_pci_driver);
5362 if (retval && !nboards) {
5363 tty_unregister_driver(cy_serial_driver);
5364 goto err_frtty;
5365 }
5366 #endif
5367
5368 return 0;
5369 err_frtty:
5370 put_tty_driver(cy_serial_driver);
5371 err:
5372 return retval;
5373 } /* cy_init */
5374
5375 static void __exit cy_cleanup_module(void)
5376 {
5377 struct cyclades_card *card;
5378 unsigned int i, e1;
5379
5380 #ifndef CONFIG_CYZ_INTR
5381 del_timer_sync(&cyz_timerlist);
5382 #endif /* CONFIG_CYZ_INTR */
5383
5384 e1 = tty_unregister_driver(cy_serial_driver);
5385 if (e1)
5386 printk(KERN_ERR "failed to unregister Cyclades serial "
5387 "driver(%d)\n", e1);
5388
5389 #ifdef CONFIG_PCI
5390 pci_unregister_driver(&cy_pci_driver);
5391 #endif
5392
5393 for (i = 0; i < NR_CARDS; i++) {
5394 card = &cy_card[i];
5395 if (card->base_addr) {
5396 /* clear interrupt */
5397 cy_writeb(card->base_addr + Cy_ClrIntr, 0);
5398 iounmap(card->base_addr);
5399 if (card->ctl_addr)
5400 iounmap(card->ctl_addr);
5401 if (card->irq
5402 #ifndef CONFIG_CYZ_INTR
5403 && !IS_CYC_Z(*card)
5404 #endif /* CONFIG_CYZ_INTR */
5405 )
5406 free_irq(card->irq, card);
5407 for (e1 = card->first_line; e1 < card->first_line +
5408 card->nports; e1++)
5409 tty_unregister_device(cy_serial_driver, e1);
5410 kfree(card->ports);
5411 }
5412 }
5413
5414 put_tty_driver(cy_serial_driver);
5415 } /* cy_cleanup_module */
5416
5417 module_init(cy_init);
5418 module_exit(cy_cleanup_module);
5419
5420 MODULE_LICENSE("GPL");
5421 MODULE_VERSION(CY_VERSION);
kernel source for telekom puls (alcatel/mediatek)