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Merge git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6
[deliverable/linux.git] / drivers / char / cyclades.c
1 #undef BLOCKMOVE
2 #define Z_WAKE
3 #undef Z_EXT_CHARS_IN_BUFFER
4
5 /*
6 * linux/drivers/char/cyclades.c
7 *
8 * This file contains the driver for the Cyclades async multiport
9 * serial boards.
10 *
11 * Initially written by Randolph Bentson <bentson@grieg.seaslug.org>.
12 * Modified and maintained by Marcio Saito <marcio@cyclades.com>.
13 * Currently maintained by Cyclades team <async@cyclades.com>.
14 *
15 * For Technical support and installation problems, please send e-mail
16 * to support@cyclades.com.
17 *
18 * Much of the design and some of the code came from serial.c
19 * which was copyright (C) 1991, 1992 Linus Torvalds. It was
20 * extensively rewritten by Theodore Ts'o, 8/16/92 -- 9/14/92,
21 * and then fixed as suggested by Michael K. Johnson 12/12/92.
22 *
23 * This version supports shared IRQ's (only for PCI boards).
24 *
25 * $Log: cyclades.c,v $
26 * Prevent users from opening non-existing Z ports.
27 *
28 * Revision 2.3.2.8 2000/07/06 18:14:16 ivan
29 * Fixed the PCI detection function to work properly on Alpha systems.
30 * Implemented support for TIOCSERGETLSR ioctl.
31 * Implemented full support for non-standard baud rates.
32 *
33 * Revision 2.3.2.7 2000/06/01 18:26:34 ivan
34 * Request PLX I/O region, although driver doesn't use it, to avoid
35 * problems with other drivers accessing it.
36 * Removed count for on-board buffer characters in cy_chars_in_buffer
37 * (Cyclades-Z only).
38 *
39 * Revision 2.3.2.6 2000/05/05 13:56:05 ivan
40 * Driver now reports physical instead of virtual memory addresses.
41 * Masks were added to some Cyclades-Z read accesses.
42 * Implemented workaround for PLX9050 bug that would cause a system lockup
43 * in certain systems, depending on the MMIO addresses allocated to the
44 * board.
45 * Changed the Tx interrupt programming in the CD1400 chips to boost up
46 * performance (Cyclom-Y only).
47 * Code is now compliant with the new module interface (module_[init|exit]).
48 * Make use of the PCI helper functions to access PCI resources.
49 * Did some code "housekeeping".
50 *
51 * Revision 2.3.2.5 2000/01/19 14:35:33 ivan
52 * Fixed bug in cy_set_termios on CRTSCTS flag turnoff.
53 *
54 * Revision 2.3.2.4 2000/01/17 09:19:40 ivan
55 * Fixed SMP locking in Cyclom-Y interrupt handler.
56 *
57 * Revision 2.3.2.3 1999/12/28 12:11:39 ivan
58 * Added a new cyclades_card field called nports to allow the driver to
59 * know the exact number of ports found by the Z firmware after its load;
60 * RX buffer contention prevention logic on interrupt op mode revisited
61 * (Cyclades-Z only);
62 * Revisited printk's for Z debug;
63 * Driver now makes sure that the constant SERIAL_XMIT_SIZE is defined;
64 *
65 * Revision 2.3.2.2 1999/10/01 11:27:43 ivan
66 * Fixed bug in cyz_poll that would make all ports but port 0
67 * unable to transmit/receive data (Cyclades-Z only);
68 * Implemented logic to prevent the RX buffer from being stuck with data
69 * due to a driver / firmware race condition in interrupt op mode
70 * (Cyclades-Z only);
71 * Fixed bug in block_til_ready logic that would lead to a system crash;
72 * Revisited cy_close spinlock usage;
73 *
74 * Revision 2.3.2.1 1999/09/28 11:01:22 ivan
75 * Revisited CONFIG_PCI conditional compilation for PCI board support;
76 * Implemented TIOCGICOUNT and TIOCMIWAIT ioctl support;
77 * _Major_ cleanup on the Cyclades-Z interrupt support code / logic;
78 * Removed CTS handling from the driver -- this is now completely handled
79 * by the firmware (Cyclades-Z only);
80 * Flush RX on-board buffers on a port open (Cyclades-Z only);
81 * Fixed handling of ASYNC_SPD_* TTY flags;
82 * Module unload now unmaps all memory area allocated by ioremap;
83 *
84 * Revision 2.3.1.1 1999/07/15 16:45:53 ivan
85 * Removed CY_PROC conditional compilation;
86 * Implemented SMP-awareness for the driver;
87 * Implemented a new ISA IRQ autoprobe that uses the irq_probe_[on|off]
88 * functions;
89 * The driver now accepts memory addresses (maddr=0xMMMMM) and IRQs
90 * (irq=NN) as parameters (only for ISA boards);
91 * Fixed bug in set_line_char that would prevent the Cyclades-Z
92 * ports from being configured at speeds above 115.2Kbps;
93 * Fixed bug in cy_set_termios that would prevent XON/XOFF flow control
94 * switching from working properly;
95 * The driver now only prints IRQ info for the Cyclades-Z if it's
96 * configured to work in interrupt mode;
97 *
98 * Revision 2.2.2.3 1999/06/28 11:13:29 ivan
99 * Added support for interrupt mode operation for the Z cards;
100 * Removed the driver inactivity control for the Z;
101 * Added a missing MOD_DEC_USE_COUNT in the cy_open function for when
102 * the Z firmware is not loaded yet;
103 * Replaced the "manual" Z Tx flush buffer by a call to a FW command of
104 * same functionality;
105 * Implemented workaround for IRQ setting loss on the PCI configuration
106 * registers after a PCI bridge EEPROM reload (affects PLX9060 only);
107 *
108 * Revision 2.2.2.2 1999/05/14 17:18:15 ivan
109 * /proc entry location changed to /proc/tty/driver/cyclades;
110 * Added support to shared IRQ's (only for PCI boards);
111 * Added support for Cobalt Qube2 systems;
112 * IRQ [de]allocation scheme revisited;
113 * BREAK implementation changed in order to make use of the 'break_ctl'
114 * TTY facility;
115 * Fixed typo in TTY structure field 'driver_name';
116 * Included a PCI bridge reset and EEPROM reload in the board
117 * initialization code (for both Y and Z series).
118 *
119 * Revision 2.2.2.1 1999/04/08 16:17:43 ivan
120 * Fixed a bug in cy_wait_until_sent that was preventing the port to be
121 * closed properly after a SIGINT;
122 * Module usage counter scheme revisited;
123 * Added support to the upcoming Y PCI boards (i.e., support to additional
124 * PCI Device ID's).
125 *
126 * Revision 2.2.1.10 1999/01/20 16:14:29 ivan
127 * Removed all unnecessary page-alignement operations in ioremap calls
128 * (ioremap is currently safe for these operations).
129 *
130 * Revision 2.2.1.9 1998/12/30 18:18:30 ivan
131 * Changed access to PLX PCI bridge registers from I/O to MMIO, in
132 * order to make PLX9050-based boards work with certain motherboards.
133 *
134 * Revision 2.2.1.8 1998/11/13 12:46:20 ivan
135 * cy_close function now resets (correctly) the tty->closing flag;
136 * JIFFIES_DIFF macro fixed.
137 *
138 * Revision 2.2.1.7 1998/09/03 12:07:28 ivan
139 * Fixed bug in cy_close function, which was not informing HW of
140 * which port should have the reception disabled before doing so;
141 * fixed Cyclom-8YoP hardware detection bug.
142 *
143 * Revision 2.2.1.6 1998/08/20 17:15:39 ivan
144 * Fixed bug in cy_close function, which causes malfunction
145 * of one of the first 4 ports when a higher port is closed
146 * (Cyclom-Y only).
147 *
148 * Revision 2.2.1.5 1998/08/10 18:10:28 ivan
149 * Fixed Cyclom-4Yo hardware detection bug.
150 *
151 * Revision 2.2.1.4 1998/08/04 11:02:50 ivan
152 * /proc/cyclades implementation with great collaboration of
153 * Marc Lewis <marc@blarg.net>;
154 * cyy_interrupt was changed to avoid occurrence of kernel oopses
155 * during PPP operation.
156 *
157 * Revision 2.2.1.3 1998/06/01 12:09:10 ivan
158 * General code review in order to comply with 2.1 kernel standards;
159 * data loss prevention for slow devices revisited (cy_wait_until_sent
160 * was created);
161 * removed conditional compilation for new/old PCI structure support
162 * (now the driver only supports the new PCI structure).
163 *
164 * Revision 2.2.1.1 1998/03/19 16:43:12 ivan
165 * added conditional compilation for new/old PCI structure support;
166 * removed kernel series (2.0.x / 2.1.x) conditional compilation.
167 *
168 * Revision 2.1.1.3 1998/03/16 18:01:12 ivan
169 * cleaned up the data loss fix;
170 * fixed XON/XOFF handling once more (Cyclades-Z);
171 * general review of the driver routines;
172 * introduction of a mechanism to prevent data loss with slow
173 * printers, by forcing a delay before closing the port.
174 *
175 * Revision 2.1.1.2 1998/02/17 16:50:00 ivan
176 * fixed detection/handling of new CD1400 in Ye boards;
177 * fixed XON/XOFF handling (Cyclades-Z);
178 * fixed data loss caused by a premature port close;
179 * introduction of a flag that holds the CD1400 version ID per port
180 * (used by the CYGETCD1400VER new ioctl).
181 *
182 * Revision 2.1.1.1 1997/12/03 17:31:19 ivan
183 * Code review for the module cleanup routine;
184 * fixed RTS and DTR status report for new CD1400's in get_modem_info;
185 * includes anonymous changes regarding signal_pending.
186 *
187 * Revision 2.1 1997/11/01 17:42:41 ivan
188 * Changes in the driver to support Alpha systems (except 8Zo V_1);
189 * BREAK fix for the Cyclades-Z boards;
190 * driver inactivity control by FW implemented;
191 * introduction of flag that allows driver to take advantage of
192 * a special CD1400 feature related to HW flow control;
193 * added support for the CD1400 rev. J (Cyclom-Y boards);
194 * introduction of ioctls to:
195 * - control the rtsdtr_inv flag (Cyclom-Y);
196 * - control the rflow flag (Cyclom-Y);
197 * - adjust the polling interval (Cyclades-Z);
198 *
199 * Revision 1.36.4.33 1997/06/27 19:00:00 ivan
200 * Fixes related to kernel version conditional
201 * compilation.
202 *
203 * Revision 1.36.4.32 1997/06/14 19:30:00 ivan
204 * Compatibility issues between kernels 2.0.x and
205 * 2.1.x (mainly related to clear_bit function).
206 *
207 * Revision 1.36.4.31 1997/06/03 15:30:00 ivan
208 * Changes to define the memory window according to the
209 * board type.
210 *
211 * Revision 1.36.4.30 1997/05/16 15:30:00 daniel
212 * Changes to support new cycladesZ boards.
213 *
214 * Revision 1.36.4.29 1997/05/12 11:30:00 daniel
215 * Merge of Bentson's and Daniel's version 1.36.4.28.
216 * Corrects bug in cy_detect_pci: check if there are more
217 * ports than the number of static structs allocated.
218 * Warning message during initialization if this driver is
219 * used with the new generation of cycladesZ boards. Those
220 * will be supported only in next release of the driver.
221 * Corrects bug in cy_detect_pci and cy_detect_isa that
222 * returned wrong number of VALID boards, when a cyclomY
223 * was found with no serial modules connected.
224 * Changes to use current (2.1.x) kernel subroutine names
225 * and created macros for compilation with 2.0.x kernel,
226 * instead of the other way around.
227 *
228 * Revision 1.36.4.28 1997/05/?? ??:00:00 bentson
229 * Change queue_task_irq_off to queue_task_irq.
230 * The inline function queue_task_irq_off (tqueue.h)
231 * was removed from latest releases of 2.1.x kernel.
232 * Use of macro __init to mark the initialization
233 * routines, so memory can be reused.
234 * Also incorporate implementation of critical region
235 * in function cleanup_module() created by anonymous
236 * linuxer.
237 *
238 * Revision 1.36.4.28 1997/04/25 16:00:00 daniel
239 * Change to support new firmware that solves DCD problem:
240 * application could fail to receive SIGHUP signal when DCD
241 * varying too fast.
242 *
243 * Revision 1.36.4.27 1997/03/26 10:30:00 daniel
244 * Changed for support linux versions 2.1.X.
245 * Backward compatible with linux versions 2.0.X.
246 * Corrected illegal use of filler field in
247 * CH_CTRL struct.
248 * Deleted some debug messages.
249 *
250 * Revision 1.36.4.26 1997/02/27 12:00:00 daniel
251 * Included check for NULL tty pointer in cyz_poll.
252 *
253 * Revision 1.36.4.25 1997/02/26 16:28:30 bentson
254 * Bill Foster at Blarg! Online services noticed that
255 * some of the switch elements of -Z modem control
256 * lacked a closing "break;"
257 *
258 * Revision 1.36.4.24 1997/02/24 11:00:00 daniel
259 * Changed low water threshold for buffer xmit_buf
260 *
261 * Revision 1.36.4.23 1996/12/02 21:50:16 bentson
262 * Marcio provided fix to modem status fetch for -Z
263 *
264 * Revision 1.36.4.22 1996/10/28 22:41:17 bentson
265 * improve mapping of -Z control page (thanks to Steve
266 * Price <stevep@fa.tdktca.com> for help on this)
267 *
268 * Revision 1.36.4.21 1996/09/10 17:00:10 bentson
269 * shift from CPU-bound to memcopy in cyz_polling operation
270 *
271 * Revision 1.36.4.20 1996/09/09 18:30:32 Bentson
272 * Added support to set and report higher speeds.
273 *
274 * Revision 1.36.4.19c 1996/08/09 10:00:00 Marcio Saito
275 * Some fixes in the HW flow control for the BETA release.
276 * Don't try to register the IRQ.
277 *
278 * Revision 1.36.4.19 1996/08/08 16:23:18 Bentson
279 * make sure "cyc" appears in all kernel messages; all soft interrupts
280 * handled by same routine; recognize out-of-band reception; comment
281 * out some diagnostic messages; leave RTS/CTS flow control to hardware;
282 * fix race condition in -Z buffer management; only -Y needs to explicitly
283 * flush chars; tidy up some startup messages;
284 *
285 * Revision 1.36.4.18 1996/07/25 18:57:31 bentson
286 * shift MOD_INC_USE_COUNT location to match
287 * serial.c; purge some diagnostic messages;
288 *
289 * Revision 1.36.4.17 1996/07/25 18:01:08 bentson
290 * enable modem status messages and fetch & process them; note
291 * time of last activity type for each port; set_line_char now
292 * supports more than line 0 and treats 0 baud correctly;
293 * get_modem_info senses rs_status;
294 *
295 * Revision 1.36.4.16 1996/07/20 08:43:15 bentson
296 * barely works--now's time to turn on
297 * more features 'til it breaks
298 *
299 * Revision 1.36.4.15 1996/07/19 22:30:06 bentson
300 * check more -Z board status; shorten boot message
301 *
302 * Revision 1.36.4.14 1996/07/19 22:20:37 bentson
303 * fix reference to ch_ctrl in startup; verify return
304 * values from cyz_issue_cmd and cyz_update_channel;
305 * more stuff to get modem control correct;
306 *
307 * Revision 1.36.4.13 1996/07/11 19:53:33 bentson
308 * more -Z stuff folded in; re-order changes to put -Z stuff
309 * after -Y stuff (to make changes clearer)
310 *
311 * Revision 1.36.4.12 1996/07/11 15:40:55 bentson
312 * Add code to poll Cyclades-Z. Add code to get & set RS-232 control.
313 * Add code to send break. Clear firmware ID word at startup (so
314 * that other code won't talk to inactive board).
315 *
316 * Revision 1.36.4.11 1996/07/09 05:28:29 bentson
317 * add code for -Z in set_line_char
318 *
319 * Revision 1.36.4.10 1996/07/08 19:28:37 bentson
320 * fold more -Z stuff (or in some cases, error messages)
321 * into driver; add text to "don't know what to do" messages.
322 *
323 * Revision 1.36.4.9 1996/07/08 18:38:38 bentson
324 * moved compile-time flags near top of file; cosmetic changes
325 * to narrow text (to allow 2-up printing); changed many declarations
326 * to "static" to limit external symbols; shuffled code order to
327 * coalesce -Y and -Z specific code, also to put internal functions
328 * in order of tty_driver structure; added code to recognize -Z
329 * ports (and for moment, do nothing or report error); add cy_startup
330 * to parse boot command line for extra base addresses for ISA probes;
331 *
332 * Revision 1.36.4.8 1996/06/25 17:40:19 bentson
333 * reorder some code, fix types of some vars (int vs. long),
334 * add cy_setup to support user declared ISA addresses
335 *
336 * Revision 1.36.4.7 1996/06/21 23:06:18 bentson
337 * dump ioctl based firmware load (it's now a user level
338 * program); ensure uninitialzed ports cannot be used
339 *
340 * Revision 1.36.4.6 1996/06/20 23:17:19 bentson
341 * rename vars and restructure some code
342 *
343 * Revision 1.36.4.5 1996/06/14 15:09:44 bentson
344 * get right status back after boot load
345 *
346 * Revision 1.36.4.4 1996/06/13 19:51:44 bentson
347 * successfully loads firmware
348 *
349 * Revision 1.36.4.3 1996/06/13 06:08:33 bentson
350 * add more of the code for the boot/load ioctls
351 *
352 * Revision 1.36.4.2 1996/06/11 21:00:51 bentson
353 * start to add Z functionality--starting with ioctl
354 * for loading firmware
355 *
356 * Revision 1.36.4.1 1996/06/10 18:03:02 bentson
357 * added code to recognize Z/PCI card at initialization; report
358 * presence, but card is not initialized (because firmware needs
359 * to be loaded)
360 *
361 * Revision 1.36.3.8 1996/06/07 16:29:00 bentson
362 * starting minor number at zero; added missing verify_area
363 * as noted by Heiko Eissfeldt <heiko@colossus.escape.de>
364 *
365 * Revision 1.36.3.7 1996/04/19 21:06:18 bentson
366 * remove unneeded boot message & fix CLOCAL hardware flow
367 * control (Miquel van Smoorenburg <miquels@Q.cistron.nl>);
368 * remove unused diagnostic statements; minor 0 is first;
369 *
370 * Revision 1.36.3.6 1996/03/13 13:21:17 marcio
371 * The kernel function vremap (available only in later 1.3.xx kernels)
372 * allows the access to memory addresses above the RAM. This revision
373 * of the driver supports PCI boards below 1Mb (device id 0x100) and
374 * above 1Mb (device id 0x101).
375 *
376 * Revision 1.36.3.5 1996/03/07 15:20:17 bentson
377 * Some global changes to interrupt handling spilled into
378 * this driver--mostly unused arguments in system function
379 * calls. Also added change by Marcio Saito which should
380 * reduce lost interrupts at startup by fast processors.
381 *
382 * Revision 1.36.3.4 1995/11/13 20:45:10 bentson
383 * Changes by Corey Minyard <minyard@wf-rch.cirr.com> distributed
384 * in 1.3.41 kernel to remove a possible race condition, extend
385 * some error messages, and let the driver run as a loadable module
386 * Change by Alan Wendt <alan@ez0.ezlink.com> to remove a
387 * possible race condition.
388 * Change by Marcio Saito <marcio@cyclades.com> to fix PCI addressing.
389 *
390 * Revision 1.36.3.3 1995/11/13 19:44:48 bentson
391 * Changes by Linus Torvalds in 1.3.33 kernel distribution
392 * required due to reordering of driver initialization.
393 * Drivers are now initialized *after* memory management.
394 *
395 * Revision 1.36.3.2 1995/09/08 22:07:14 bentson
396 * remove printk from ISR; fix typo
397 *
398 * Revision 1.36.3.1 1995/09/01 12:00:42 marcio
399 * Minor fixes in the PCI board support. PCI function calls in
400 * conditional compilation (CONFIG_PCI). Thanks to Jim Duncan
401 * <duncan@okay.com>. "bad serial count" message removed.
402 *
403 * Revision 1.36.3 1995/08/22 09:19:42 marcio
404 * Cyclom-Y/PCI support added. Changes in the cy_init routine and
405 * board initialization. Changes in the boot messages. The driver
406 * supports up to 4 boards and 64 ports by default.
407 *
408 * Revision 1.36.1.4 1995/03/29 06:14:14 bentson
409 * disambiguate between Cyclom-16Y and Cyclom-32Ye;
410 *
411 * Revision 1.36.1.3 1995/03/23 22:15:35 bentson
412 * add missing break in modem control block in ioctl switch statement
413 * (discovered by Michael Edward Chastain <mec@jobe.shell.portal.com>);
414 *
415 * Revision 1.36.1.2 1995/03/22 19:16:22 bentson
416 * make sure CTS flow control is set as soon as possible (thanks
417 * to note from David Lambert <lambert@chesapeake.rps.slb.com>);
418 *
419 * Revision 1.36.1.1 1995/03/13 15:44:43 bentson
420 * initialize defaults for receive threshold and stale data timeout;
421 * cosmetic changes;
422 *
423 * Revision 1.36 1995/03/10 23:33:53 bentson
424 * added support of chips 4-7 in 32 port Cyclom-Ye;
425 * fix cy_interrupt pointer dereference problem
426 * (Joe Portman <baron@aa.net>);
427 * give better error response if open is attempted on non-existent port
428 * (Zachariah Vaum <jchryslr@netcom.com>);
429 * correct command timeout (Kenneth Lerman <lerman@@seltd.newnet.com>);
430 * conditional compilation for -16Y on systems with fast, noisy bus;
431 * comment out diagnostic print function;
432 * cleaned up table of base addresses;
433 * set receiver time-out period register to correct value,
434 * set receive threshold to better default values,
435 * set chip timer to more accurate 200 Hz ticking,
436 * add code to monitor and modify receive parameters
437 * (Rik Faith <faith@cs.unc.edu> Nick Simicich
438 * <njs@scifi.emi.net>);
439 *
440 * Revision 1.35 1994/12/16 13:54:18 steffen
441 * additional patch by Marcio Saito for board detection
442 * Accidently left out in 1.34
443 *
444 * Revision 1.34 1994/12/10 12:37:12 steffen
445 * This is the corrected version as suggested by Marcio Saito
446 *
447 * Revision 1.33 1994/12/01 22:41:18 bentson
448 * add hooks to support more high speeds directly; add tytso
449 * patch regarding CLOCAL wakeups
450 *
451 * Revision 1.32 1994/11/23 19:50:04 bentson
452 * allow direct kernel control of higher signalling rates;
453 * look for cards at additional locations
454 *
455 * Revision 1.31 1994/11/16 04:33:28 bentson
456 * ANOTHER fix from Corey Minyard, minyard@wf-rch.cirr.com--
457 * a problem in chars_in_buffer has been resolved by some
458 * small changes; this should yield smoother output
459 *
460 * Revision 1.30 1994/11/16 04:28:05 bentson
461 * Fix from Corey Minyard, Internet: minyard@metronet.com,
462 * UUCP: minyard@wf-rch.cirr.com, WORK: minyardbnr.ca, to
463 * cy_hangup that appears to clear up much (all?) of the
464 * DTR glitches; also he's added/cleaned-up diagnostic messages
465 *
466 * Revision 1.29 1994/11/16 04:16:07 bentson
467 * add change proposed by Ralph Sims, ralphs@halcyon.com, to
468 * operate higher speeds in same way as other serial ports;
469 * add more serial ports (for up to two 16-port muxes).
470 *
471 * Revision 1.28 1994/11/04 00:13:16 root
472 * turn off diagnostic messages
473 *
474 * Revision 1.27 1994/11/03 23:46:37 root
475 * bunch of changes to bring driver into greater conformance
476 * with the serial.c driver (looking for missed fixes)
477 *
478 * Revision 1.26 1994/11/03 22:40:36 root
479 * automatic interrupt probing fixed.
480 *
481 * Revision 1.25 1994/11/03 20:17:02 root
482 * start to implement auto-irq
483 *
484 * Revision 1.24 1994/11/03 18:01:55 root
485 * still working on modem signals--trying not to drop DTR
486 * during the getty/login processes
487 *
488 * Revision 1.23 1994/11/03 17:51:36 root
489 * extend baud rate support; set receive threshold as function
490 * of baud rate; fix some problems with RTS/CTS;
491 *
492 * Revision 1.22 1994/11/02 18:05:35 root
493 * changed arguments to udelay to type long to get
494 * delays to be of correct duration
495 *
496 * Revision 1.21 1994/11/02 17:37:30 root
497 * employ udelay (after calibrating loops_per_second earlier
498 * in init/main.c) instead of using home-grown delay routines
499 *
500 * Revision 1.20 1994/11/02 03:11:38 root
501 * cy_chars_in_buffer forces a return value of 0 to let
502 * login work (don't know why it does); some functions
503 * that were returning EFAULT, now executes the code;
504 * more work on deciding when to disable xmit interrupts;
505 *
506 * Revision 1.19 1994/11/01 20:10:14 root
507 * define routine to start transmission interrupts (by enabling
508 * transmit interrupts); directly enable/disable modem interrupts;
509 *
510 * Revision 1.18 1994/11/01 18:40:45 bentson
511 * Don't always enable transmit interrupts in startup; interrupt on
512 * TxMpty instead of TxRdy to help characters get out before shutdown;
513 * restructure xmit interrupt to check for chars first and quit if
514 * none are ready to go; modem status (MXVRx) is upright, _not_ inverted
515 * (to my view);
516 *
517 * Revision 1.17 1994/10/30 04:39:45 bentson
518 * rename serial_driver and callout_driver to cy_serial_driver and
519 * cy_callout_driver to avoid linkage interference; initialize
520 * info->type to PORT_CIRRUS; ruggedize paranoia test; elide ->port
521 * from cyclades_port structure; add paranoia check to cy_close;
522 *
523 * Revision 1.16 1994/10/30 01:14:33 bentson
524 * change major numbers; add some _early_ return statements;
525 *
526 * Revision 1.15 1994/10/29 06:43:15 bentson
527 * final tidying up for clean compile; enable some error reporting
528 *
529 * Revision 1.14 1994/10/28 20:30:22 Bentson
530 * lots of changes to drag the driver towards the new tty_io
531 * structures and operation. not expected to work, but may
532 * compile cleanly.
533 *
534 * Revision 1.13 1994/07/21 23:08:57 Bentson
535 * add some diagnostic cruft; support 24 lines (for testing
536 * both -8Y and -16Y cards; be more thorough in servicing all
537 * chips during interrupt; add "volatile" a few places to
538 * circumvent compiler optimizations; fix base & offset
539 * computations in block_til_ready (was causing chip 0 to
540 * stop operation)
541 *
542 * Revision 1.12 1994/07/19 16:42:11 Bentson
543 * add some hackery for kernel version 1.1.8; expand
544 * error messages; refine timing for delay loops and
545 * declare loop params volatile
546 *
547 * Revision 1.11 1994/06/11 21:53:10 bentson
548 * get use of save_car right in transmit interrupt service
549 *
550 * Revision 1.10.1.1 1994/06/11 21:31:18 bentson
551 * add some diagnostic printing; try to fix save_car stuff
552 *
553 * Revision 1.10 1994/06/11 20:36:08 bentson
554 * clean up compiler warnings
555 *
556 * Revision 1.9 1994/06/11 19:42:46 bentson
557 * added a bunch of code to support modem signalling
558 *
559 * Revision 1.8 1994/06/11 17:57:07 bentson
560 * recognize break & parity error
561 *
562 * Revision 1.7 1994/06/05 05:51:34 bentson
563 * Reorder baud table to be monotonic; add cli to CP; discard
564 * incoming characters and status if the line isn't open; start to
565 * fold code into cy_throttle; start to port get_serial_info,
566 * set_serial_info, get_modem_info, set_modem_info, and send_break
567 * from serial.c; expand cy_ioctl; relocate and expand config_setup;
568 * get flow control characters from tty struct; invalidate ports w/o
569 * hardware;
570 *
571 * Revision 1.6 1994/05/31 18:42:21 bentson
572 * add a loop-breaker in the interrupt service routine;
573 * note when port is initialized so that it can be shut
574 * down under the right conditions; receive works without
575 * any obvious errors
576 *
577 * Revision 1.5 1994/05/30 00:55:02 bentson
578 * transmit works without obvious errors
579 *
580 * Revision 1.4 1994/05/27 18:46:27 bentson
581 * incorporated more code from lib_y.c; can now print short
582 * strings under interrupt control to port zero; seems to
583 * select ports/channels/lines correctly
584 *
585 * Revision 1.3 1994/05/25 22:12:44 bentson
586 * shifting from multi-port on a card to proper multiplexor
587 * data structures; added skeletons of most routines
588 *
589 * Revision 1.2 1994/05/19 13:21:43 bentson
590 * start to crib from other sources
591 *
592 */
593
594 #define CY_VERSION "2.4"
595
596 /* If you need to install more boards than NR_CARDS, change the constant
597 in the definition below. No other change is necessary to support up to
598 eight boards. Beyond that you'll have to extend cy_isa_addresses. */
599
600 #define NR_CARDS 4
601
602 /*
603 If the total number of ports is larger than NR_PORTS, change this
604 constant in the definition below. No other change is necessary to
605 support more boards/ports. */
606
607 #define NR_PORTS 256
608
609 #define ZE_V1_NPORTS 64
610 #define ZO_V1 0
611 #define ZO_V2 1
612 #define ZE_V1 2
613
614 #define SERIAL_PARANOIA_CHECK
615 #undef CY_DEBUG_OPEN
616 #undef CY_DEBUG_THROTTLE
617 #undef CY_DEBUG_OTHER
618 #undef CY_DEBUG_IO
619 #undef CY_DEBUG_COUNT
620 #undef CY_DEBUG_DTR
621 #undef CY_DEBUG_WAIT_UNTIL_SENT
622 #undef CY_DEBUG_INTERRUPTS
623 #undef CY_16Y_HACK
624 #undef CY_ENABLE_MONITORING
625 #undef CY_PCI_DEBUG
626
627 #if 0
628 #define PAUSE __asm__("nop")
629 #else
630 #define PAUSE do {} while (0)
631 #endif
632
633 /*
634 * Include section
635 */
636 #include <linux/module.h>
637 #include <linux/errno.h>
638 #include <linux/signal.h>
639 #include <linux/sched.h>
640 #include <linux/timer.h>
641 #include <linux/interrupt.h>
642 #include <linux/tty.h>
643 #include <linux/tty_flip.h>
644 #include <linux/serial.h>
645 #include <linux/major.h>
646 #include <linux/string.h>
647 #include <linux/fcntl.h>
648 #include <linux/ptrace.h>
649 #include <linux/cyclades.h>
650 #include <linux/mm.h>
651 #include <linux/ioport.h>
652 #include <linux/init.h>
653 #include <linux/delay.h>
654 #include <linux/spinlock.h>
655 #include <linux/bitops.h>
656
657 #include <asm/system.h>
658 #include <asm/io.h>
659 #include <asm/irq.h>
660 #include <asm/uaccess.h>
661
662 #define CY_LOCK(info,flags) \
663 do { \
664 spin_lock_irqsave(&cy_card[info->card].card_lock, flags); \
665 } while (0)
666
667 #define CY_UNLOCK(info,flags) \
668 do { \
669 spin_unlock_irqrestore(&cy_card[info->card].card_lock, flags); \
670 } while (0)
671
672 #include <linux/types.h>
673 #include <linux/kernel.h>
674 #include <linux/pci.h>
675
676 #include <linux/stat.h>
677 #include <linux/proc_fs.h>
678
679 static void cy_throttle(struct tty_struct *tty);
680 static void cy_send_xchar(struct tty_struct *tty, char ch);
681
682 #define IS_CYC_Z(card) ((card).num_chips == -1)
683
684 #define Z_FPGA_CHECK(card) \
685 ((cy_readl(&((struct RUNTIME_9060 __iomem *) \
686 ((card).ctl_addr))->init_ctrl) & (1<<17)) != 0)
687
688 #define ISZLOADED(card) (((ZO_V1==cy_readl(&((struct RUNTIME_9060 __iomem *) \
689 ((card).ctl_addr))->mail_box_0)) || \
690 Z_FPGA_CHECK(card)) && \
691 (ZFIRM_ID==cy_readl(&((struct FIRM_ID __iomem *) \
692 ((card).base_addr+ID_ADDRESS))->signature)))
693
694 #ifndef SERIAL_XMIT_SIZE
695 #define SERIAL_XMIT_SIZE (min(PAGE_SIZE, 4096))
696 #endif
697 #define WAKEUP_CHARS 256
698
699 #define STD_COM_FLAGS (0)
700
701 static struct tty_driver *cy_serial_driver;
702
703 #ifdef CONFIG_ISA
704 /* This is the address lookup table. The driver will probe for
705 Cyclom-Y/ISA boards at all addresses in here. If you want the
706 driver to probe addresses at a different address, add it to
707 this table. If the driver is probing some other board and
708 causing problems, remove the offending address from this table.
709 The cy_setup function extracts additional addresses from the
710 boot options line. The form is "cyclades=address,address..."
711 */
712
713 static unsigned int cy_isa_addresses[] = {
714 0xD0000,
715 0xD2000,
716 0xD4000,
717 0xD6000,
718 0xD8000,
719 0xDA000,
720 0xDC000,
721 0xDE000,
722 0, 0, 0, 0, 0, 0, 0, 0
723 };
724
725 #define NR_ISA_ADDRS ARRAY_SIZE(cy_isa_addresses)
726
727 #ifdef MODULE
728 static long maddr[NR_CARDS] = { 0, };
729 static int irq[NR_CARDS] = { 0, };
730
731 module_param_array(maddr, long, NULL, 0);
732 module_param_array(irq, int, NULL, 0);
733 #endif
734
735 #endif /* CONFIG_ISA */
736
737 /* This is the per-card data structure containing address, irq, number of
738 channels, etc. This driver supports a maximum of NR_CARDS cards.
739 */
740 static struct cyclades_card cy_card[NR_CARDS];
741
742 /* This is the per-channel data structure containing pointers, flags
743 and variables for the port. This driver supports a maximum of NR_PORTS.
744 */
745 static struct cyclades_port cy_port[NR_PORTS];
746
747 static int cy_next_channel; /* next minor available */
748
749 /*
750 * This is used to look up the divisor speeds and the timeouts
751 * We're normally limited to 15 distinct baud rates. The extra
752 * are accessed via settings in info->flags.
753 * 0, 1, 2, 3, 4, 5, 6, 7, 8, 9,
754 * 10, 11, 12, 13, 14, 15, 16, 17, 18, 19,
755 * HI VHI
756 * 20
757 */
758 static int baud_table[] = {
759 0, 50, 75, 110, 134, 150, 200, 300, 600, 1200,
760 1800, 2400, 4800, 9600, 19200, 38400, 57600, 76800, 115200, 150000,
761 230400, 0
762 };
763
764 static char baud_co_25[] = { /* 25 MHz clock option table */
765 /* value => 00 01 02 03 04 */
766 /* divide by 8 32 128 512 2048 */
767 0x00, 0x04, 0x04, 0x04, 0x04, 0x04, 0x03, 0x03, 0x03, 0x02,
768 0x02, 0x02, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
769 };
770
771 static char baud_bpr_25[] = { /* 25 MHz baud rate period table */
772 0x00, 0xf5, 0xa3, 0x6f, 0x5c, 0x51, 0xf5, 0xa3, 0x51, 0xa3,
773 0x6d, 0x51, 0xa3, 0x51, 0xa3, 0x51, 0x36, 0x29, 0x1b, 0x15
774 };
775
776 static char baud_co_60[] = { /* 60 MHz clock option table (CD1400 J) */
777 /* value => 00 01 02 03 04 */
778 /* divide by 8 32 128 512 2048 */
779 0x00, 0x00, 0x00, 0x04, 0x04, 0x04, 0x04, 0x04, 0x03, 0x03,
780 0x03, 0x02, 0x02, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00,
781 0x00
782 };
783
784 static char baud_bpr_60[] = { /* 60 MHz baud rate period table (CD1400 J) */
785 0x00, 0x82, 0x21, 0xff, 0xdb, 0xc3, 0x92, 0x62, 0xc3, 0x62,
786 0x41, 0xc3, 0x62, 0xc3, 0x62, 0xc3, 0x82, 0x62, 0x41, 0x32,
787 0x21
788 };
789
790 static char baud_cor3[] = { /* receive threshold */
791 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a,
792 0x0a, 0x0a, 0x0a, 0x09, 0x09, 0x08, 0x08, 0x08, 0x08, 0x07,
793 0x07
794 };
795
796 /*
797 * The Cyclades driver implements HW flow control as any serial driver.
798 * The cyclades_port structure member rflow and the vector rflow_thr
799 * allows us to take advantage of a special feature in the CD1400 to avoid
800 * data loss even when the system interrupt latency is too high. These flags
801 * are to be used only with very special applications. Setting these flags
802 * requires the use of a special cable (DTR and RTS reversed). In the new
803 * CD1400-based boards (rev. 6.00 or later), there is no need for special
804 * cables.
805 */
806
807 static char rflow_thr[] = { /* rflow threshold */
808 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
809 0x00, 0x00, 0x00, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a,
810 0x0a
811 };
812
813 /* The Cyclom-Ye has placed the sequential chips in non-sequential
814 * address order. This look-up table overcomes that problem.
815 */
816 static int cy_chip_offset[] = { 0x0000,
817 0x0400,
818 0x0800,
819 0x0C00,
820 0x0200,
821 0x0600,
822 0x0A00,
823 0x0E00
824 };
825
826 /* PCI related definitions */
827
828 static unsigned short cy_pci_nboard;
829 static unsigned short cy_isa_nboard;
830 static unsigned short cy_nboard;
831 #ifdef CONFIG_PCI
832 static struct pci_device_id cy_pci_dev_id[] __devinitdata = {
833 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Y_Lo) }, /* PCI < 1Mb */
834 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Y_Hi) }, /* PCI > 1Mb */
835 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_4Y_Lo) }, /* 4Y PCI < 1Mb */
836 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_4Y_Hi) }, /* 4Y PCI > 1Mb */
837 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_8Y_Lo) }, /* 8Y PCI < 1Mb */
838 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_8Y_Hi) }, /* 8Y PCI > 1Mb */
839 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Z_Lo) }, /* Z PCI < 1Mb */
840 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Z_Hi) }, /* Z PCI > 1Mb */
841 { } /* end of table */
842 };
843 MODULE_DEVICE_TABLE(pci, cy_pci_dev_id);
844 #endif
845
846 static void cy_start(struct tty_struct *);
847 static void set_line_char(struct cyclades_port *);
848 static int cyz_issue_cmd(struct cyclades_card *, uclong, ucchar, uclong);
849 #ifdef CONFIG_ISA
850 static unsigned detect_isa_irq(void __iomem *);
851 #endif /* CONFIG_ISA */
852
853 static int cyclades_get_proc_info(char *, char **, off_t, int, int *, void *);
854
855 #ifndef CONFIG_CYZ_INTR
856 static void cyz_poll(unsigned long);
857
858 /* The Cyclades-Z polling cycle is defined by this variable */
859 static long cyz_polling_cycle = CZ_DEF_POLL;
860
861 static int cyz_timeron = 0;
862 static DEFINE_TIMER(cyz_timerlist, cyz_poll, 0, 0);
863
864 #else /* CONFIG_CYZ_INTR */
865 static void cyz_rx_restart(unsigned long);
866 static struct timer_list cyz_rx_full_timer[NR_PORTS];
867 #endif /* CONFIG_CYZ_INTR */
868
869 static inline int serial_paranoia_check(struct cyclades_port *info,
870 char *name, const char *routine)
871 {
872 #ifdef SERIAL_PARANOIA_CHECK
873 if (!info) {
874 printk("cyc Warning: null cyclades_port for (%s) in %s\n",
875 name, routine);
876 return 1;
877 }
878
879 if ((long)info < (long)(&cy_port[0]) ||
880 (long)(&cy_port[NR_PORTS]) < (long)info) {
881 printk("cyc Warning: cyclades_port out of range for (%s) in "
882 "%s\n", name, routine);
883 return 1;
884 }
885
886 if (info->magic != CYCLADES_MAGIC) {
887 printk("cyc Warning: bad magic number for serial struct (%s) "
888 "in %s\n", name, routine);
889 return 1;
890 }
891 #endif
892 return 0;
893 } /* serial_paranoia_check */
894
895 /*
896 * This routine is used by the interrupt handler to schedule
897 * processing in the software interrupt portion of the driver
898 * (also known as the "bottom half"). This can be called any
899 * number of times for any channel without harm.
900 */
901 static inline void cy_sched_event(struct cyclades_port *info, int event)
902 {
903 info->event |= 1 << event; /* remember what kind of event and who */
904 schedule_work(&info->tqueue);
905 } /* cy_sched_event */
906
907 /*
908 * This routine is used to handle the "bottom half" processing for the
909 * serial driver, known also the "software interrupt" processing.
910 * This processing is done at the kernel interrupt level, after the
911 * cy#/_interrupt() has returned, BUT WITH INTERRUPTS TURNED ON. This
912 * is where time-consuming activities which can not be done in the
913 * interrupt driver proper are done; the interrupt driver schedules
914 * them using cy_sched_event(), and they get done here.
915 *
916 * This is done through one level of indirection--the task queue.
917 * When a hardware interrupt service routine wants service by the
918 * driver's bottom half, it enqueues the appropriate tq_struct (one
919 * per port) to the keventd work queue and sets a request flag
920 * that the work queue be processed.
921 *
922 * Although this may seem unwieldy, it gives the system a way to
923 * pass an argument (in this case the pointer to the cyclades_port
924 * structure) to the bottom half of the driver. Previous kernels
925 * had to poll every port to see if that port needed servicing.
926 */
927 static void
928 do_softint(struct work_struct *work)
929 {
930 struct cyclades_port *info =
931 container_of(work, struct cyclades_port, tqueue);
932 struct tty_struct *tty;
933
934 tty = info->tty;
935 if (!tty)
936 return;
937
938 if (test_and_clear_bit(Cy_EVENT_HANGUP, &info->event)) {
939 tty_hangup(info->tty);
940 wake_up_interruptible(&info->open_wait);
941 info->flags &= ~ASYNC_NORMAL_ACTIVE;
942 }
943 if (test_and_clear_bit(Cy_EVENT_OPEN_WAKEUP, &info->event))
944 wake_up_interruptible(&info->open_wait);
945 #ifdef CONFIG_CYZ_INTR
946 if (test_and_clear_bit(Cy_EVENT_Z_RX_FULL, &info->event)) {
947 if (cyz_rx_full_timer[info->line].function == NULL) {
948 cyz_rx_full_timer[info->line].expires = jiffies + 1;
949 cyz_rx_full_timer[info->line].function = cyz_rx_restart;
950 cyz_rx_full_timer[info->line].data =
951 (unsigned long)info;
952 add_timer(&cyz_rx_full_timer[info->line]);
953 }
954 }
955 #endif
956 if (test_and_clear_bit(Cy_EVENT_DELTA_WAKEUP, &info->event))
957 wake_up_interruptible(&info->delta_msr_wait);
958 tty_wakeup(tty);
959 #ifdef Z_WAKE
960 if (test_and_clear_bit(Cy_EVENT_SHUTDOWN_WAKEUP, &info->event))
961 wake_up_interruptible(&info->shutdown_wait);
962 #endif
963 } /* do_softint */
964
965
966 /***********************************************************/
967 /********* Start of block of Cyclom-Y specific code ********/
968
969 /* This routine waits up to 1000 micro-seconds for the previous
970 command to the Cirrus chip to complete and then issues the
971 new command. An error is returned if the previous command
972 didn't finish within the time limit.
973
974 This function is only called from inside spinlock-protected code.
975 */
976 static int cyy_issue_cmd(void __iomem * base_addr, u_char cmd, int index)
977 {
978 volatile int i;
979
980 /* Check to see that the previous command has completed */
981 for (i = 0; i < 100; i++) {
982 if (cy_readb(base_addr + (CyCCR << index)) == 0) {
983 break;
984 }
985 udelay(10L);
986 }
987 /* if the CCR never cleared, the previous command
988 didn't finish within the "reasonable time" */
989 if (i == 100)
990 return -1;
991
992 /* Issue the new command */
993 cy_writeb(base_addr + (CyCCR << index), cmd);
994
995 return 0;
996 } /* cyy_issue_cmd */
997
998 #ifdef CONFIG_ISA
999 /* ISA interrupt detection code */
1000 static unsigned detect_isa_irq(void __iomem * address)
1001 {
1002 int irq;
1003 unsigned long irqs, flags;
1004 int save_xir, save_car;
1005 int index = 0; /* IRQ probing is only for ISA */
1006
1007 /* forget possible initially masked and pending IRQ */
1008 irq = probe_irq_off(probe_irq_on());
1009
1010 /* Clear interrupts on the board first */
1011 cy_writeb(address + (Cy_ClrIntr << index), 0);
1012 /* Cy_ClrIntr is 0x1800 */
1013
1014 irqs = probe_irq_on();
1015 /* Wait ... */
1016 udelay(5000L);
1017
1018 /* Enable the Tx interrupts on the CD1400 */
1019 local_irq_save(flags);
1020 cy_writeb(address + (CyCAR << index), 0);
1021 cyy_issue_cmd(address, CyCHAN_CTL | CyENB_XMTR, index);
1022
1023 cy_writeb(address + (CyCAR << index), 0);
1024 cy_writeb(address + (CySRER << index),
1025 cy_readb(address + (CySRER << index)) | CyTxRdy);
1026 local_irq_restore(flags);
1027
1028 /* Wait ... */
1029 udelay(5000L);
1030
1031 /* Check which interrupt is in use */
1032 irq = probe_irq_off(irqs);
1033
1034 /* Clean up */
1035 save_xir = (u_char) cy_readb(address + (CyTIR << index));
1036 save_car = cy_readb(address + (CyCAR << index));
1037 cy_writeb(address + (CyCAR << index), (save_xir & 0x3));
1038 cy_writeb(address + (CySRER << index),
1039 cy_readb(address + (CySRER << index)) & ~CyTxRdy);
1040 cy_writeb(address + (CyTIR << index), (save_xir & 0x3f));
1041 cy_writeb(address + (CyCAR << index), (save_car));
1042 cy_writeb(address + (Cy_ClrIntr << index), 0);
1043 /* Cy_ClrIntr is 0x1800 */
1044
1045 return (irq > 0) ? irq : 0;
1046 }
1047 #endif /* CONFIG_ISA */
1048
1049 static void cyy_intr_chip(struct cyclades_card *cinfo, int chip,
1050 void __iomem * base_addr, int status, int index)
1051 {
1052 struct cyclades_port *info;
1053 struct tty_struct *tty;
1054 volatile int char_count;
1055 int i, j, len, mdm_change, mdm_status, outch;
1056 int save_xir, channel, save_car;
1057 char data;
1058
1059 if (status & CySRReceive) { /* reception interrupt */
1060 #ifdef CY_DEBUG_INTERRUPTS
1061 printk("cyy_interrupt: rcvd intr, chip %d\n\r", chip);
1062 #endif
1063 /* determine the channel & change to that context */
1064 spin_lock(&cinfo->card_lock);
1065 save_xir = (u_char) cy_readb(base_addr + (CyRIR << index));
1066 channel = (u_short) (save_xir & CyIRChannel);
1067 i = channel + chip * 4 + cinfo->first_line;
1068 info = &cy_port[i];
1069 info->last_active = jiffies;
1070 save_car = cy_readb(base_addr + (CyCAR << index));
1071 cy_writeb(base_addr + (CyCAR << index), save_xir);
1072
1073 /* if there is nowhere to put the data, discard it */
1074 if (info->tty == 0) {
1075 j = (cy_readb(base_addr + (CyRIVR << index)) &
1076 CyIVRMask);
1077 if (j == CyIVRRxEx) { /* exception */
1078 data = cy_readb(base_addr + (CyRDSR << index));
1079 } else { /* normal character reception */
1080 char_count = cy_readb(base_addr +
1081 (CyRDCR << index));
1082 while (char_count--) {
1083 data = cy_readb(base_addr +
1084 (CyRDSR << index));
1085 }
1086 }
1087 } else { /* there is an open port for this data */
1088 tty = info->tty;
1089 j = (cy_readb(base_addr + (CyRIVR << index)) &
1090 CyIVRMask);
1091 if (j == CyIVRRxEx) { /* exception */
1092 data = cy_readb(base_addr + (CyRDSR << index));
1093
1094 /* For statistics only */
1095 if (data & CyBREAK)
1096 info->icount.brk++;
1097 else if (data & CyFRAME)
1098 info->icount.frame++;
1099 else if (data & CyPARITY)
1100 info->icount.parity++;
1101 else if (data & CyOVERRUN)
1102 info->icount.overrun++;
1103
1104 if (data & info->ignore_status_mask) {
1105 info->icount.rx++;
1106 return;
1107 }
1108 if (tty_buffer_request_room(tty, 1)) {
1109 if (data & info->read_status_mask) {
1110 if (data & CyBREAK) {
1111 tty_insert_flip_char(
1112 tty,
1113 cy_readb(
1114 base_addr +
1115 (CyRDSR <<
1116 index)),
1117 TTY_BREAK);
1118 info->icount.rx++;
1119 if (info->flags &
1120 ASYNC_SAK) {
1121 do_SAK(tty);
1122 }
1123 } else if (data & CyFRAME) {
1124 tty_insert_flip_char(
1125 tty,
1126 cy_readb(
1127 base_addr +
1128 (CyRDSR <<
1129 index)),
1130 TTY_FRAME);
1131 info->icount.rx++;
1132 info->idle_stats.
1133 frame_errs++;
1134 } else if (data & CyPARITY) {
1135 /* Pieces of seven... */
1136 tty_insert_flip_char(
1137 tty,
1138 cy_readb(
1139 base_addr +
1140 (CyRDSR <<
1141 index)),
1142 TTY_PARITY);
1143 info->icount.rx++;
1144 info->idle_stats.
1145 parity_errs++;
1146 } else if (data & CyOVERRUN) {
1147 tty_insert_flip_char(
1148 tty, 0,
1149 TTY_OVERRUN);
1150 info->icount.rx++;
1151 /* If the flip buffer itself is
1152 overflowing, we still lose
1153 the next incoming character.
1154 */
1155 tty_insert_flip_char(
1156 tty,
1157 cy_readb(
1158 base_addr +
1159 (CyRDSR <<
1160 index)),
1161 TTY_FRAME);
1162 info->icount.rx++;
1163 info->idle_stats.
1164 overruns++;
1165 /* These two conditions may imply */
1166 /* a normal read should be done. */
1167 /* }else if(data & CyTIMEOUT){ */
1168 /* }else if(data & CySPECHAR){ */
1169 } else {
1170 tty_insert_flip_char(
1171 tty, 0,
1172 TTY_NORMAL);
1173 info->icount.rx++;
1174 }
1175 } else {
1176 tty_insert_flip_char(tty, 0,
1177 TTY_NORMAL);
1178 info->icount.rx++;
1179 }
1180 } else {
1181 /* there was a software buffer
1182 overrun and nothing could be
1183 done about it!!! */
1184 info->icount.buf_overrun++;
1185 info->idle_stats.overruns++;
1186 }
1187 } else { /* normal character reception */
1188 /* load # chars available from the chip */
1189 char_count = cy_readb(base_addr +
1190 (CyRDCR << index));
1191
1192 #ifdef CY_ENABLE_MONITORING
1193 ++info->mon.int_count;
1194 info->mon.char_count += char_count;
1195 if (char_count > info->mon.char_max)
1196 info->mon.char_max = char_count;
1197 info->mon.char_last = char_count;
1198 #endif
1199 len = tty_buffer_request_room(tty, char_count);
1200 while (len--) {
1201 data = cy_readb(base_addr +
1202 (CyRDSR << index));
1203 tty_insert_flip_char(tty, data,
1204 TTY_NORMAL);
1205 info->idle_stats.recv_bytes++;
1206 info->icount.rx++;
1207 #ifdef CY_16Y_HACK
1208 udelay(10L);
1209 #endif
1210 }
1211 info->idle_stats.recv_idle = jiffies;
1212 }
1213 tty_schedule_flip(tty);
1214 }
1215 /* end of service */
1216 cy_writeb(base_addr + (CyRIR << index), (save_xir & 0x3f));
1217 cy_writeb(base_addr + (CyCAR << index), (save_car));
1218 spin_unlock(&cinfo->card_lock);
1219 }
1220
1221 if (status & CySRTransmit) { /* transmission interrupt */
1222 /* Since we only get here when the transmit buffer
1223 is empty, we know we can always stuff a dozen
1224 characters. */
1225 #ifdef CY_DEBUG_INTERRUPTS
1226 printk("cyy_interrupt: xmit intr, chip %d\n\r", chip);
1227 #endif
1228
1229 /* determine the channel & change to that context */
1230 spin_lock(&cinfo->card_lock);
1231 save_xir = (u_char) cy_readb(base_addr + (CyTIR << index));
1232 channel = (u_short) (save_xir & CyIRChannel);
1233 i = channel + chip * 4 + cinfo->first_line;
1234 save_car = cy_readb(base_addr + (CyCAR << index));
1235 cy_writeb(base_addr + (CyCAR << index), save_xir);
1236
1237 /* validate the port# (as configured and open) */
1238 if ((i < 0) || (NR_PORTS <= i)) {
1239 cy_writeb(base_addr + (CySRER << index),
1240 cy_readb(base_addr + (CySRER << index)) &
1241 ~CyTxRdy);
1242 goto txend;
1243 }
1244 info = &cy_port[i];
1245 info->last_active = jiffies;
1246 if (info->tty == 0) {
1247 cy_writeb(base_addr + (CySRER << index),
1248 cy_readb(base_addr + (CySRER << index)) &
1249 ~CyTxRdy);
1250 goto txdone;
1251 }
1252
1253 /* load the on-chip space for outbound data */
1254 char_count = info->xmit_fifo_size;
1255
1256 if (info->x_char) { /* send special char */
1257 outch = info->x_char;
1258 cy_writeb(base_addr + (CyTDR << index), outch);
1259 char_count--;
1260 info->icount.tx++;
1261 info->x_char = 0;
1262 }
1263
1264 if (info->breakon || info->breakoff) {
1265 if (info->breakon) {
1266 cy_writeb(base_addr + (CyTDR << index), 0);
1267 cy_writeb(base_addr + (CyTDR << index), 0x81);
1268 info->breakon = 0;
1269 char_count -= 2;
1270 }
1271 if (info->breakoff) {
1272 cy_writeb(base_addr + (CyTDR << index), 0);
1273 cy_writeb(base_addr + (CyTDR << index), 0x83);
1274 info->breakoff = 0;
1275 char_count -= 2;
1276 }
1277 }
1278
1279 while (char_count-- > 0) {
1280 if (!info->xmit_cnt) {
1281 if (cy_readb(base_addr + (CySRER << index)) &
1282 CyTxMpty) {
1283 cy_writeb(base_addr + (CySRER << index),
1284 cy_readb(base_addr +
1285 (CySRER << index)) &
1286 ~CyTxMpty);
1287 } else {
1288 cy_writeb(base_addr + (CySRER << index),
1289 (cy_readb(base_addr +
1290 (CySRER << index)) &
1291 ~CyTxRdy) | CyTxMpty);
1292 }
1293 goto txdone;
1294 }
1295 if (info->xmit_buf == 0) {
1296 cy_writeb(base_addr + (CySRER << index),
1297 cy_readb(base_addr + (CySRER << index))&
1298 ~CyTxRdy);
1299 goto txdone;
1300 }
1301 if (info->tty->stopped || info->tty->hw_stopped) {
1302 cy_writeb(base_addr + (CySRER << index),
1303 cy_readb(base_addr + (CySRER << index))&
1304 ~CyTxRdy);
1305 goto txdone;
1306 }
1307 /* Because the Embedded Transmit Commands have
1308 been enabled, we must check to see if the
1309 escape character, NULL, is being sent. If it
1310 is, we must ensure that there is room for it
1311 to be doubled in the output stream. Therefore
1312 we no longer advance the pointer when the
1313 character is fetched, but rather wait until
1314 after the check for a NULL output character.
1315 This is necessary because there may not be
1316 room for the two chars needed to send a NULL.)
1317 */
1318 outch = info->xmit_buf[info->xmit_tail];
1319 if (outch) {
1320 info->xmit_cnt--;
1321 info->xmit_tail = (info->xmit_tail + 1) &
1322 (SERIAL_XMIT_SIZE - 1);
1323 cy_writeb(base_addr + (CyTDR << index), outch);
1324 info->icount.tx++;
1325 } else {
1326 if (char_count > 1) {
1327 info->xmit_cnt--;
1328 info->xmit_tail = (info->xmit_tail + 1)&
1329 (SERIAL_XMIT_SIZE - 1);
1330 cy_writeb(base_addr + (CyTDR << index),
1331 outch);
1332 cy_writeb(base_addr + (CyTDR << index),
1333 0);
1334 info->icount.tx++;
1335 char_count--;
1336 } else {
1337 }
1338 }
1339 }
1340
1341 txdone:
1342 if (info->xmit_cnt < WAKEUP_CHARS) {
1343 cy_sched_event(info, Cy_EVENT_WRITE_WAKEUP);
1344 }
1345 txend:
1346 /* end of service */
1347 cy_writeb(base_addr + (CyTIR << index), (save_xir & 0x3f));
1348 cy_writeb(base_addr + (CyCAR << index), (save_car));
1349 spin_unlock(&cinfo->card_lock);
1350 }
1351
1352 if (status & CySRModem) { /* modem interrupt */
1353
1354 /* determine the channel & change to that context */
1355 spin_lock(&cinfo->card_lock);
1356 save_xir = (u_char) cy_readb(base_addr + (CyMIR << index));
1357 channel = (u_short) (save_xir & CyIRChannel);
1358 info = &cy_port[channel + chip * 4 + cinfo->first_line];
1359 info->last_active = jiffies;
1360 save_car = cy_readb(base_addr + (CyCAR << index));
1361 cy_writeb(base_addr + (CyCAR << index), save_xir);
1362
1363 mdm_change = cy_readb(base_addr + (CyMISR << index));
1364 mdm_status = cy_readb(base_addr + (CyMSVR1 << index));
1365
1366 if (info->tty == 0) { /* no place for data, ignore it */
1367 ;
1368 } else {
1369 if (mdm_change & CyANY_DELTA) {
1370 /* For statistics only */
1371 if (mdm_change & CyDCD)
1372 info->icount.dcd++;
1373 if (mdm_change & CyCTS)
1374 info->icount.cts++;
1375 if (mdm_change & CyDSR)
1376 info->icount.dsr++;
1377 if (mdm_change & CyRI)
1378 info->icount.rng++;
1379
1380 cy_sched_event(info, Cy_EVENT_DELTA_WAKEUP);
1381 }
1382
1383 if ((mdm_change & CyDCD) &&
1384 (info->flags & ASYNC_CHECK_CD)) {
1385 if (mdm_status & CyDCD) {
1386 cy_sched_event(info,
1387 Cy_EVENT_OPEN_WAKEUP);
1388 } else {
1389 cy_sched_event(info, Cy_EVENT_HANGUP);
1390 }
1391 }
1392 if ((mdm_change & CyCTS) &&
1393 (info->flags & ASYNC_CTS_FLOW)) {
1394 if (info->tty->hw_stopped) {
1395 if (mdm_status & CyCTS) {
1396 /* cy_start isn't used
1397 because... !!! */
1398 info->tty->hw_stopped = 0;
1399 cy_writeb(base_addr +
1400 (CySRER << index),
1401 cy_readb(base_addr +
1402 (CySRER <<
1403 index))|
1404 CyTxRdy);
1405 cy_sched_event(info,
1406 Cy_EVENT_WRITE_WAKEUP);
1407 }
1408 } else {
1409 if (!(mdm_status & CyCTS)) {
1410 /* cy_stop isn't used
1411 because ... !!! */
1412 info->tty->hw_stopped = 1;
1413 cy_writeb(base_addr +
1414 (CySRER << index),
1415 cy_readb(base_addr +
1416 (CySRER <<
1417 index)) &
1418 ~CyTxRdy);
1419 }
1420 }
1421 }
1422 if (mdm_change & CyDSR) {
1423 }
1424 if (mdm_change & CyRI) {
1425 }
1426 }
1427 /* end of service */
1428 cy_writeb(base_addr + (CyMIR << index), (save_xir & 0x3f));
1429 cy_writeb(base_addr + (CyCAR << index), save_car);
1430 spin_unlock(&cinfo->card_lock);
1431 }
1432 }
1433
1434 /* The real interrupt service routine is called
1435 whenever the card wants its hand held--chars
1436 received, out buffer empty, modem change, etc.
1437 */
1438 static irqreturn_t cyy_interrupt(int irq, void *dev_id)
1439 {
1440 int status;
1441 struct cyclades_card *cinfo;
1442 void __iomem *base_addr, *card_base_addr;
1443 int chip;
1444 int index;
1445 int too_many;
1446 int had_work;
1447
1448 if ((cinfo = (struct cyclades_card *)dev_id) == 0) {
1449 #ifdef CY_DEBUG_INTERRUPTS
1450 printk("cyy_interrupt: spurious interrupt %d\n\r", irq);
1451 #endif
1452 return IRQ_NONE; /* spurious interrupt */
1453 }
1454
1455 card_base_addr = cinfo->base_addr;
1456 index = cinfo->bus_index;
1457
1458 /* This loop checks all chips in the card. Make a note whenever
1459 _any_ chip had some work to do, as this is considered an
1460 indication that there will be more to do. Only when no chip
1461 has any work does this outermost loop exit.
1462 */
1463 do {
1464 had_work = 0;
1465 for (chip = 0; chip < cinfo->num_chips; chip++) {
1466 base_addr = cinfo->base_addr +
1467 (cy_chip_offset[chip] << index);
1468 too_many = 0;
1469 while ((status = cy_readb(base_addr +
1470 (CySVRR << index))) != 0x00) {
1471 had_work++;
1472 /* The purpose of the following test is to ensure that
1473 no chip can monopolize the driver. This forces the
1474 chips to be checked in a round-robin fashion (after
1475 draining each of a bunch (1000) of characters).
1476 */
1477 if (1000 < too_many++) {
1478 break;
1479 }
1480 cyy_intr_chip(cinfo, chip, base_addr, status,
1481 index);
1482 }
1483 }
1484 } while (had_work);
1485
1486 /* clear interrupts */
1487 spin_lock(&cinfo->card_lock);
1488 cy_writeb(card_base_addr + (Cy_ClrIntr << index), 0);
1489 /* Cy_ClrIntr is 0x1800 */
1490 spin_unlock(&cinfo->card_lock);
1491 return IRQ_HANDLED;
1492 } /* cyy_interrupt */
1493
1494 /***********************************************************/
1495 /********* End of block of Cyclom-Y specific code **********/
1496 /******** Start of block of Cyclades-Z specific code *********/
1497 /***********************************************************/
1498
1499 static int
1500 cyz_fetch_msg(struct cyclades_card *cinfo,
1501 uclong * channel, ucchar * cmd, uclong * param)
1502 {
1503 struct FIRM_ID __iomem *firm_id;
1504 struct ZFW_CTRL __iomem *zfw_ctrl;
1505 struct BOARD_CTRL __iomem *board_ctrl;
1506 unsigned long loc_doorbell;
1507
1508 firm_id = cinfo->base_addr + ID_ADDRESS;
1509 if (!ISZLOADED(*cinfo)) {
1510 return -1;
1511 }
1512 zfw_ctrl = cinfo->base_addr + (cy_readl(&firm_id->zfwctrl_addr) &
1513 0xfffff);
1514 board_ctrl = &zfw_ctrl->board_ctrl;
1515
1516 loc_doorbell = cy_readl(&((struct RUNTIME_9060 __iomem *)
1517 (cinfo->ctl_addr))->loc_doorbell);
1518 if (loc_doorbell) {
1519 *cmd = (char)(0xff & loc_doorbell);
1520 *channel = cy_readl(&board_ctrl->fwcmd_channel);
1521 *param = (uclong) cy_readl(&board_ctrl->fwcmd_param);
1522 cy_writel(&((struct RUNTIME_9060 __iomem *)(cinfo->ctl_addr))->
1523 loc_doorbell, 0xffffffff);
1524 return 1;
1525 }
1526 return 0;
1527 } /* cyz_fetch_msg */
1528
1529 static int
1530 cyz_issue_cmd(struct cyclades_card *cinfo,
1531 uclong channel, ucchar cmd, uclong param)
1532 {
1533 struct FIRM_ID __iomem *firm_id;
1534 struct ZFW_CTRL __iomem *zfw_ctrl;
1535 struct BOARD_CTRL __iomem *board_ctrl;
1536 unsigned long __iomem *pci_doorbell;
1537 int index;
1538
1539 firm_id = cinfo->base_addr + ID_ADDRESS;
1540 if (!ISZLOADED(*cinfo)) {
1541 return -1;
1542 }
1543 zfw_ctrl = cinfo->base_addr + (cy_readl(&firm_id->zfwctrl_addr) &
1544 0xfffff);
1545 board_ctrl = &zfw_ctrl->board_ctrl;
1546
1547 index = 0;
1548 pci_doorbell =
1549 &((struct RUNTIME_9060 __iomem *)(cinfo->ctl_addr))->pci_doorbell;
1550 while ((cy_readl(pci_doorbell) & 0xff) != 0) {
1551 if (index++ == 1000) {
1552 return (int)(cy_readl(pci_doorbell) & 0xff);
1553 }
1554 udelay(50L);
1555 }
1556 cy_writel(&board_ctrl->hcmd_channel, channel);
1557 cy_writel(&board_ctrl->hcmd_param, param);
1558 cy_writel(pci_doorbell, (long)cmd);
1559
1560 return 0;
1561 } /* cyz_issue_cmd */
1562
1563 static void
1564 cyz_handle_rx(struct cyclades_port *info,
1565 volatile struct CH_CTRL __iomem * ch_ctrl,
1566 volatile struct BUF_CTRL __iomem * buf_ctrl)
1567 {
1568 struct cyclades_card *cinfo = &cy_card[info->card];
1569 struct tty_struct *tty = info->tty;
1570 volatile int char_count;
1571 int len;
1572 #ifdef BLOCKMOVE
1573 int small_count;
1574 #else
1575 char data;
1576 #endif
1577 volatile uclong rx_put, rx_get, new_rx_get, rx_bufsize, rx_bufaddr;
1578
1579 rx_get = new_rx_get = cy_readl(&buf_ctrl->rx_get);
1580 rx_put = cy_readl(&buf_ctrl->rx_put);
1581 rx_bufsize = cy_readl(&buf_ctrl->rx_bufsize);
1582 rx_bufaddr = cy_readl(&buf_ctrl->rx_bufaddr);
1583 if (rx_put >= rx_get)
1584 char_count = rx_put - rx_get;
1585 else
1586 char_count = rx_put - rx_get + rx_bufsize;
1587
1588 if (char_count) {
1589 info->last_active = jiffies;
1590 info->jiffies[1] = jiffies;
1591
1592 #ifdef CY_ENABLE_MONITORING
1593 info->mon.int_count++;
1594 info->mon.char_count += char_count;
1595 if (char_count > info->mon.char_max)
1596 info->mon.char_max = char_count;
1597 info->mon.char_last = char_count;
1598 #endif
1599 if (tty == 0) {
1600 /* flush received characters */
1601 new_rx_get = (new_rx_get + char_count) &
1602 (rx_bufsize - 1);
1603 info->rflush_count++;
1604 } else {
1605 #ifdef BLOCKMOVE
1606 /* we'd like to use memcpy(t, f, n) and memset(s, c, count)
1607 for performance, but because of buffer boundaries, there
1608 may be several steps to the operation */
1609 while (0 < (small_count = min_t(unsigned int,
1610 rx_bufsize - new_rx_get,
1611 min_t(unsigned int, TTY_FLIPBUF_SIZE -
1612 tty->flip.count, char_count)))){
1613 memcpy_fromio(tty->flip.char_buf_ptr,
1614 (char *)(cinfo->base_addr + rx_bufaddr +
1615 new_rx_get),
1616 small_count);
1617
1618 tty->flip.char_buf_ptr += small_count;
1619 memset(tty->flip.flag_buf_ptr, TTY_NORMAL,
1620 small_count);
1621 tty->flip.flag_buf_ptr += small_count;
1622 new_rx_get = (new_rx_get + small_count) &
1623 (rx_bufsize - 1);
1624 char_count -= small_count;
1625 info->icount.rx += small_count;
1626 info->idle_stats.recv_bytes += small_count;
1627 tty->flip.count += small_count;
1628 }
1629 #else
1630 len = tty_buffer_request_room(tty, char_count);
1631 while (len--) {
1632 data = cy_readb(cinfo->base_addr + rx_bufaddr +
1633 new_rx_get);
1634 new_rx_get = (new_rx_get + 1)& (rx_bufsize - 1);
1635 tty_insert_flip_char(tty, data, TTY_NORMAL);
1636 info->idle_stats.recv_bytes++;
1637 info->icount.rx++;
1638 }
1639 #endif
1640 #ifdef CONFIG_CYZ_INTR
1641 /* Recalculate the number of chars in the RX buffer and issue
1642 a cmd in case it's higher than the RX high water mark */
1643 rx_put = cy_readl(&buf_ctrl->rx_put);
1644 if (rx_put >= rx_get)
1645 char_count = rx_put - rx_get;
1646 else
1647 char_count = rx_put - rx_get + rx_bufsize;
1648 if (char_count >= (int)cy_readl(&buf_ctrl->
1649 rx_threshold)) {
1650 cy_sched_event(info, Cy_EVENT_Z_RX_FULL);
1651 }
1652 #endif
1653 info->idle_stats.recv_idle = jiffies;
1654 tty_schedule_flip(tty);
1655 }
1656 /* Update rx_get */
1657 cy_writel(&buf_ctrl->rx_get, new_rx_get);
1658 }
1659 }
1660
1661 static void
1662 cyz_handle_tx(struct cyclades_port *info,
1663 volatile struct CH_CTRL __iomem * ch_ctrl,
1664 volatile struct BUF_CTRL __iomem * buf_ctrl)
1665 {
1666 struct cyclades_card *cinfo = &cy_card[info->card];
1667 struct tty_struct *tty = info->tty;
1668 char data;
1669 volatile int char_count;
1670 #ifdef BLOCKMOVE
1671 int small_count;
1672 #endif
1673 volatile uclong tx_put, tx_get, tx_bufsize, tx_bufaddr;
1674
1675 if (info->xmit_cnt <= 0) /* Nothing to transmit */
1676 return;
1677
1678 tx_get = cy_readl(&buf_ctrl->tx_get);
1679 tx_put = cy_readl(&buf_ctrl->tx_put);
1680 tx_bufsize = cy_readl(&buf_ctrl->tx_bufsize);
1681 tx_bufaddr = cy_readl(&buf_ctrl->tx_bufaddr);
1682 if (tx_put >= tx_get)
1683 char_count = tx_get - tx_put - 1 + tx_bufsize;
1684 else
1685 char_count = tx_get - tx_put - 1;
1686
1687 if (char_count) {
1688
1689 if (tty == 0) {
1690 goto ztxdone;
1691 }
1692
1693 if (info->x_char) { /* send special char */
1694 data = info->x_char;
1695
1696 cy_writeb(cinfo->base_addr + tx_bufaddr + tx_put, data);
1697 tx_put = (tx_put + 1) & (tx_bufsize - 1);
1698 info->x_char = 0;
1699 char_count--;
1700 info->icount.tx++;
1701 info->last_active = jiffies;
1702 info->jiffies[2] = jiffies;
1703 }
1704 #ifdef BLOCKMOVE
1705 while (0 < (small_count = min_t(unsigned int,
1706 tx_bufsize - tx_put, min_t(unsigned int,
1707 (SERIAL_XMIT_SIZE - info->xmit_tail),
1708 min_t(unsigned int, info->xmit_cnt,
1709 char_count))))) {
1710
1711 memcpy_toio((char *)(cinfo->base_addr + tx_bufaddr +
1712 tx_put),
1713 &info->xmit_buf[info->xmit_tail],
1714 small_count);
1715
1716 tx_put = (tx_put + small_count) & (tx_bufsize - 1);
1717 char_count -= small_count;
1718 info->icount.tx += small_count;
1719 info->xmit_cnt -= small_count;
1720 info->xmit_tail = (info->xmit_tail + small_count) &
1721 (SERIAL_XMIT_SIZE - 1);
1722 info->last_active = jiffies;
1723 info->jiffies[2] = jiffies;
1724 }
1725 #else
1726 while (info->xmit_cnt && char_count) {
1727 data = info->xmit_buf[info->xmit_tail];
1728 info->xmit_cnt--;
1729 info->xmit_tail = (info->xmit_tail + 1) &
1730 (SERIAL_XMIT_SIZE - 1);
1731
1732 cy_writeb(cinfo->base_addr + tx_bufaddr + tx_put, data);
1733 tx_put = (tx_put + 1) & (tx_bufsize - 1);
1734 char_count--;
1735 info->icount.tx++;
1736 info->last_active = jiffies;
1737 info->jiffies[2] = jiffies;
1738 }
1739 #endif
1740 ztxdone:
1741 if (info->xmit_cnt < WAKEUP_CHARS) {
1742 cy_sched_event(info, Cy_EVENT_WRITE_WAKEUP);
1743 }
1744 /* Update tx_put */
1745 cy_writel(&buf_ctrl->tx_put, tx_put);
1746 }
1747 }
1748
1749 static void cyz_handle_cmd(struct cyclades_card *cinfo)
1750 {
1751 struct tty_struct *tty;
1752 struct cyclades_port *info;
1753 static volatile struct FIRM_ID __iomem *firm_id;
1754 static volatile struct ZFW_CTRL __iomem *zfw_ctrl;
1755 static volatile struct BOARD_CTRL __iomem *board_ctrl;
1756 static volatile struct CH_CTRL __iomem *ch_ctrl;
1757 static volatile struct BUF_CTRL __iomem *buf_ctrl;
1758 uclong channel;
1759 ucchar cmd;
1760 uclong param;
1761 uclong hw_ver, fw_ver;
1762 int special_count;
1763 int delta_count;
1764
1765 firm_id = cinfo->base_addr + ID_ADDRESS;
1766 zfw_ctrl = cinfo->base_addr + (cy_readl(&firm_id->zfwctrl_addr) &
1767 0xfffff);
1768 board_ctrl = &zfw_ctrl->board_ctrl;
1769 fw_ver = cy_readl(&board_ctrl->fw_version);
1770 hw_ver = cy_readl(&((struct RUNTIME_9060 __iomem *)(cinfo->ctl_addr))->
1771 mail_box_0);
1772
1773 while (cyz_fetch_msg(cinfo, &channel, &cmd, &param) == 1) {
1774 special_count = 0;
1775 delta_count = 0;
1776 info = &cy_port[channel + cinfo->first_line];
1777 if ((tty = info->tty) == 0) {
1778 continue;
1779 }
1780 ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]);
1781 buf_ctrl = &(zfw_ctrl->buf_ctrl[channel]);
1782
1783 switch (cmd) {
1784 case C_CM_PR_ERROR:
1785 tty_insert_flip_char(tty, 0, TTY_PARITY);
1786 info->icount.rx++;
1787 special_count++;
1788 break;
1789 case C_CM_FR_ERROR:
1790 tty_insert_flip_char(tty, 0, TTY_FRAME);
1791 info->icount.rx++;
1792 special_count++;
1793 break;
1794 case C_CM_RXBRK:
1795 tty_insert_flip_char(tty, 0, TTY_BREAK);
1796 info->icount.rx++;
1797 special_count++;
1798 break;
1799 case C_CM_MDCD:
1800 info->icount.dcd++;
1801 delta_count++;
1802 if (info->flags & ASYNC_CHECK_CD) {
1803 if ((fw_ver > 241 ? ((u_long) param) :
1804 cy_readl(&ch_ctrl->rs_status)) &
1805 C_RS_DCD) {
1806 cy_sched_event(info,
1807 Cy_EVENT_OPEN_WAKEUP);
1808 } else {
1809 cy_sched_event(info, Cy_EVENT_HANGUP);
1810 }
1811 }
1812 break;
1813 case C_CM_MCTS:
1814 info->icount.cts++;
1815 delta_count++;
1816 break;
1817 case C_CM_MRI:
1818 info->icount.rng++;
1819 delta_count++;
1820 break;
1821 case C_CM_MDSR:
1822 info->icount.dsr++;
1823 delta_count++;
1824 break;
1825 #ifdef Z_WAKE
1826 case C_CM_IOCTLW:
1827 cy_sched_event(info, Cy_EVENT_SHUTDOWN_WAKEUP);
1828 break;
1829 #endif
1830 #ifdef CONFIG_CYZ_INTR
1831 case C_CM_RXHIWM:
1832 case C_CM_RXNNDT:
1833 case C_CM_INTBACK2:
1834 /* Reception Interrupt */
1835 #ifdef CY_DEBUG_INTERRUPTS
1836 printk("cyz_interrupt: rcvd intr, card %d, "
1837 "port %ld\n\r", info->card, channel);
1838 #endif
1839 cyz_handle_rx(info, ch_ctrl, buf_ctrl);
1840 break;
1841 case C_CM_TXBEMPTY:
1842 case C_CM_TXLOWWM:
1843 case C_CM_INTBACK:
1844 /* Transmission Interrupt */
1845 #ifdef CY_DEBUG_INTERRUPTS
1846 printk("cyz_interrupt: xmit intr, card %d, "
1847 "port %ld\n\r", info->card, channel);
1848 #endif
1849 cyz_handle_tx(info, ch_ctrl, buf_ctrl);
1850 break;
1851 #endif /* CONFIG_CYZ_INTR */
1852 case C_CM_FATAL:
1853 /* should do something with this !!! */
1854 break;
1855 default:
1856 break;
1857 }
1858 if (delta_count)
1859 cy_sched_event(info, Cy_EVENT_DELTA_WAKEUP);
1860 if (special_count)
1861 tty_schedule_flip(tty);
1862 }
1863 }
1864
1865 #ifdef CONFIG_CYZ_INTR
1866 static irqreturn_t cyz_interrupt(int irq, void *dev_id)
1867 {
1868 struct cyclades_card *cinfo;
1869
1870 if ((cinfo = (struct cyclades_card *)dev_id) == 0) {
1871 #ifdef CY_DEBUG_INTERRUPTS
1872 printk("cyz_interrupt: spurious interrupt %d\n\r", irq);
1873 #endif
1874 return IRQ_NONE; /* spurious interrupt */
1875 }
1876
1877 if (!ISZLOADED(*cinfo)) {
1878 #ifdef CY_DEBUG_INTERRUPTS
1879 printk("cyz_interrupt: board not yet loaded (IRQ%d).\n\r", irq);
1880 #endif
1881 return IRQ_NONE;
1882 }
1883
1884 /* Handle the interrupts */
1885 cyz_handle_cmd(cinfo);
1886
1887 return IRQ_HANDLED;
1888 } /* cyz_interrupt */
1889
1890 static void cyz_rx_restart(unsigned long arg)
1891 {
1892 struct cyclades_port *info = (struct cyclades_port *)arg;
1893 int retval;
1894 int card = info->card;
1895 uclong channel = (info->line) - (cy_card[card].first_line);
1896 unsigned long flags;
1897
1898 CY_LOCK(info, flags);
1899 retval = cyz_issue_cmd(&cy_card[card], channel, C_CM_INTBACK2, 0L);
1900 if (retval != 0) {
1901 printk("cyc:cyz_rx_restart retval on ttyC%d was %x\n",
1902 info->line, retval);
1903 }
1904 cyz_rx_full_timer[info->line].function = NULL;
1905 CY_UNLOCK(info, flags);
1906 }
1907
1908 #else /* CONFIG_CYZ_INTR */
1909
1910 static void cyz_poll(unsigned long arg)
1911 {
1912 struct cyclades_card *cinfo;
1913 struct cyclades_port *info;
1914 struct tty_struct *tty;
1915 static volatile struct FIRM_ID *firm_id;
1916 static volatile struct ZFW_CTRL *zfw_ctrl;
1917 static volatile struct BOARD_CTRL *board_ctrl;
1918 static volatile struct CH_CTRL *ch_ctrl;
1919 static volatile struct BUF_CTRL *buf_ctrl;
1920 int card, port;
1921
1922 cyz_timerlist.expires = jiffies + (HZ);
1923 for (card = 0; card < NR_CARDS; card++) {
1924 cinfo = &cy_card[card];
1925
1926 if (!IS_CYC_Z(*cinfo))
1927 continue;
1928 if (!ISZLOADED(*cinfo))
1929 continue;
1930
1931 firm_id = cinfo->base_addr + ID_ADDRESS;
1932 zfw_ctrl = cinfo->base_addr +
1933 (cy_readl(&firm_id->zfwctrl_addr) & 0xfffff);
1934 board_ctrl = &(zfw_ctrl->board_ctrl);
1935
1936 /* Skip first polling cycle to avoid racing conditions with the FW */
1937 if (!cinfo->intr_enabled) {
1938 cinfo->nports = (int)cy_readl(&board_ctrl->n_channel);
1939 cinfo->intr_enabled = 1;
1940 continue;
1941 }
1942
1943 cyz_handle_cmd(cinfo);
1944
1945 for (port = 0; port < cinfo->nports; port++) {
1946 info = &cy_port[port + cinfo->first_line];
1947 tty = info->tty;
1948 ch_ctrl = &(zfw_ctrl->ch_ctrl[port]);
1949 buf_ctrl = &(zfw_ctrl->buf_ctrl[port]);
1950
1951 if (!info->throttle)
1952 cyz_handle_rx(info, ch_ctrl, buf_ctrl);
1953 cyz_handle_tx(info, ch_ctrl, buf_ctrl);
1954 }
1955 /* poll every 'cyz_polling_cycle' period */
1956 cyz_timerlist.expires = jiffies + cyz_polling_cycle;
1957 }
1958 add_timer(&cyz_timerlist);
1959 } /* cyz_poll */
1960
1961 #endif /* CONFIG_CYZ_INTR */
1962
1963 /********** End of block of Cyclades-Z specific code *********/
1964 /***********************************************************/
1965
1966 /* This is called whenever a port becomes active;
1967 interrupts are enabled and DTR & RTS are turned on.
1968 */
1969 static int startup(struct cyclades_port *info)
1970 {
1971 unsigned long flags;
1972 int retval = 0;
1973 void __iomem *base_addr;
1974 int card, chip, channel, index;
1975 unsigned long page;
1976
1977 card = info->card;
1978 channel = (info->line) - (cy_card[card].first_line);
1979
1980 page = get_zeroed_page(GFP_KERNEL);
1981 if (!page)
1982 return -ENOMEM;
1983
1984 CY_LOCK(info, flags);
1985
1986 if (info->flags & ASYNC_INITIALIZED) {
1987 free_page(page);
1988 goto errout;
1989 }
1990
1991 if (!info->type) {
1992 if (info->tty) {
1993 set_bit(TTY_IO_ERROR, &info->tty->flags);
1994 }
1995 free_page(page);
1996 goto errout;
1997 }
1998
1999 if (info->xmit_buf)
2000 free_page(page);
2001 else
2002 info->xmit_buf = (unsigned char *)page;
2003
2004 CY_UNLOCK(info, flags);
2005
2006 set_line_char(info);
2007
2008 if (!IS_CYC_Z(cy_card[card])) {
2009 chip = channel >> 2;
2010 channel &= 0x03;
2011 index = cy_card[card].bus_index;
2012 base_addr = cy_card[card].base_addr +
2013 (cy_chip_offset[chip] << index);
2014
2015 #ifdef CY_DEBUG_OPEN
2016 printk("cyc startup card %d, chip %d, channel %d, "
2017 "base_addr %lx\n",
2018 card, chip, channel, (long)base_addr);
2019 /**/
2020 #endif
2021 CY_LOCK(info, flags);
2022
2023 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
2024
2025 cy_writeb(base_addr + (CyRTPR << index),
2026 (info->default_timeout ? info->default_timeout : 0x02));
2027 /* 10ms rx timeout */
2028
2029 cyy_issue_cmd(base_addr, CyCHAN_CTL | CyENB_RCVR | CyENB_XMTR,
2030 index);
2031
2032 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
2033 cy_writeb(base_addr + (CyMSVR1 << index), CyRTS);
2034 cy_writeb(base_addr + (CyMSVR2 << index), CyDTR);
2035
2036 #ifdef CY_DEBUG_DTR
2037 printk("cyc:startup raising DTR\n");
2038 printk(" status: 0x%x, 0x%x\n",
2039 cy_readb(base_addr + (CyMSVR1 << index)),
2040 cy_readb(base_addr + (CyMSVR2 << index)));
2041 #endif
2042
2043 cy_writeb(base_addr + (CySRER << index),
2044 cy_readb(base_addr + (CySRER << index)) | CyRxData);
2045 info->flags |= ASYNC_INITIALIZED;
2046
2047 if (info->tty) {
2048 clear_bit(TTY_IO_ERROR, &info->tty->flags);
2049 }
2050 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
2051 info->breakon = info->breakoff = 0;
2052 memset((char *)&info->idle_stats, 0, sizeof(info->idle_stats));
2053 info->idle_stats.in_use =
2054 info->idle_stats.recv_idle =
2055 info->idle_stats.xmit_idle = jiffies;
2056
2057 CY_UNLOCK(info, flags);
2058
2059 } else {
2060 struct FIRM_ID __iomem *firm_id;
2061 struct ZFW_CTRL __iomem *zfw_ctrl;
2062 struct BOARD_CTRL __iomem *board_ctrl;
2063 struct CH_CTRL __iomem *ch_ctrl;
2064 int retval;
2065
2066 base_addr = cy_card[card].base_addr;
2067
2068 firm_id = base_addr + ID_ADDRESS;
2069 if (!ISZLOADED(cy_card[card])) {
2070 return -ENODEV;
2071 }
2072
2073 zfw_ctrl = cy_card[card].base_addr +
2074 (cy_readl(&firm_id->zfwctrl_addr) & 0xfffff);
2075 board_ctrl = &zfw_ctrl->board_ctrl;
2076 ch_ctrl = zfw_ctrl->ch_ctrl;
2077
2078 #ifdef CY_DEBUG_OPEN
2079 printk("cyc startup Z card %d, channel %d, base_addr %lx\n",
2080 card, channel, (long)base_addr);
2081 /**/
2082 #endif
2083 CY_LOCK(info, flags);
2084
2085 cy_writel(&ch_ctrl[channel].op_mode, C_CH_ENABLE);
2086 #ifdef Z_WAKE
2087 #ifdef CONFIG_CYZ_INTR
2088 cy_writel(&ch_ctrl[channel].intr_enable,
2089 C_IN_TXBEMPTY | C_IN_TXLOWWM | C_IN_RXHIWM |
2090 C_IN_RXNNDT | C_IN_IOCTLW | C_IN_MDCD);
2091 #else
2092 cy_writel(&ch_ctrl[channel].intr_enable,
2093 C_IN_IOCTLW | C_IN_MDCD);
2094 #endif /* CONFIG_CYZ_INTR */
2095 #else
2096 #ifdef CONFIG_CYZ_INTR
2097 cy_writel(&ch_ctrl[channel].intr_enable,
2098 C_IN_TXBEMPTY | C_IN_TXLOWWM | C_IN_RXHIWM |
2099 C_IN_RXNNDT | C_IN_MDCD);
2100 #else
2101 cy_writel(&ch_ctrl[channel].intr_enable, C_IN_MDCD);
2102 #endif /* CONFIG_CYZ_INTR */
2103 #endif /* Z_WAKE */
2104
2105 retval = cyz_issue_cmd(&cy_card[card], channel, C_CM_IOCTL, 0L);
2106 if (retval != 0) {
2107 printk("cyc:startup(1) retval on ttyC%d was %x\n",
2108 info->line, retval);
2109 }
2110
2111 /* Flush RX buffers before raising DTR and RTS */
2112 retval = cyz_issue_cmd(&cy_card[card], channel, C_CM_FLUSH_RX,
2113 0L);
2114 if (retval != 0) {
2115 printk("cyc:startup(2) retval on ttyC%d was %x\n",
2116 info->line, retval);
2117 }
2118
2119 /* set timeout !!! */
2120 /* set RTS and DTR !!! */
2121 cy_writel(&ch_ctrl[channel].rs_control,
2122 cy_readl(&ch_ctrl[channel].rs_control) | C_RS_RTS |
2123 C_RS_DTR);
2124 retval = cyz_issue_cmd(&cy_card[info->card], channel,
2125 C_CM_IOCTLM, 0L);
2126 if (retval != 0) {
2127 printk("cyc:startup(3) retval on ttyC%d was %x\n",
2128 info->line, retval);
2129 }
2130 #ifdef CY_DEBUG_DTR
2131 printk("cyc:startup raising Z DTR\n");
2132 #endif
2133
2134 /* enable send, recv, modem !!! */
2135
2136 info->flags |= ASYNC_INITIALIZED;
2137 if (info->tty) {
2138 clear_bit(TTY_IO_ERROR, &info->tty->flags);
2139 }
2140 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
2141 info->breakon = info->breakoff = 0;
2142 memset((char *)&info->idle_stats, 0, sizeof(info->idle_stats));
2143 info->idle_stats.in_use =
2144 info->idle_stats.recv_idle =
2145 info->idle_stats.xmit_idle = jiffies;
2146
2147 CY_UNLOCK(info, flags);
2148 }
2149
2150 #ifdef CY_DEBUG_OPEN
2151 printk(" cyc startup done\n");
2152 #endif
2153 return 0;
2154
2155 errout:
2156 CY_UNLOCK(info, flags);
2157 return retval;
2158 } /* startup */
2159
2160 static void start_xmit(struct cyclades_port *info)
2161 {
2162 unsigned long flags;
2163 void __iomem *base_addr;
2164 int card, chip, channel, index;
2165
2166 card = info->card;
2167 channel = (info->line) - (cy_card[card].first_line);
2168 if (!IS_CYC_Z(cy_card[card])) {
2169 chip = channel >> 2;
2170 channel &= 0x03;
2171 index = cy_card[card].bus_index;
2172 base_addr = cy_card[card].base_addr +
2173 (cy_chip_offset[chip] << index);
2174
2175 CY_LOCK(info, flags);
2176 cy_writeb(base_addr + (CyCAR << index), channel);
2177 cy_writeb(base_addr + (CySRER << index),
2178 cy_readb(base_addr + (CySRER << index)) | CyTxRdy);
2179 CY_UNLOCK(info, flags);
2180 } else {
2181 #ifdef CONFIG_CYZ_INTR
2182 int retval;
2183
2184 CY_LOCK(info, flags);
2185 retval = cyz_issue_cmd(&cy_card[card], channel, C_CM_INTBACK,
2186 0L);
2187 if (retval != 0) {
2188 printk("cyc:start_xmit retval on ttyC%d was %x\n",
2189 info->line, retval);
2190 }
2191 CY_UNLOCK(info, flags);
2192 #else /* CONFIG_CYZ_INTR */
2193 /* Don't have to do anything at this time */
2194 #endif /* CONFIG_CYZ_INTR */
2195 }
2196 } /* start_xmit */
2197
2198 /*
2199 * This routine shuts down a serial port; interrupts are disabled,
2200 * and DTR is dropped if the hangup on close termio flag is on.
2201 */
2202 static void shutdown(struct cyclades_port *info)
2203 {
2204 unsigned long flags;
2205 void __iomem *base_addr;
2206 int card, chip, channel, index;
2207
2208 if (!(info->flags & ASYNC_INITIALIZED)) {
2209 return;
2210 }
2211
2212 card = info->card;
2213 channel = info->line - cy_card[card].first_line;
2214 if (!IS_CYC_Z(cy_card[card])) {
2215 chip = channel >> 2;
2216 channel &= 0x03;
2217 index = cy_card[card].bus_index;
2218 base_addr = cy_card[card].base_addr +
2219 (cy_chip_offset[chip] << index);
2220
2221 #ifdef CY_DEBUG_OPEN
2222 printk("cyc shutdown Y card %d, chip %d, channel %d, "
2223 "base_addr %lx\n",
2224 card, chip, channel, (long)base_addr);
2225 #endif
2226
2227 CY_LOCK(info, flags);
2228
2229 /* Clear delta_msr_wait queue to avoid mem leaks. */
2230 wake_up_interruptible(&info->delta_msr_wait);
2231
2232 if (info->xmit_buf) {
2233 unsigned char *temp;
2234 temp = info->xmit_buf;
2235 info->xmit_buf = NULL;
2236 free_page((unsigned long)temp);
2237 }
2238 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
2239 if (!info->tty || (info->tty->termios->c_cflag & HUPCL)) {
2240 cy_writeb(base_addr + (CyMSVR1 << index), ~CyRTS);
2241 cy_writeb(base_addr + (CyMSVR2 << index), ~CyDTR);
2242 #ifdef CY_DEBUG_DTR
2243 printk("cyc shutdown dropping DTR\n");
2244 printk(" status: 0x%x, 0x%x\n",
2245 cy_readb(base_addr + (CyMSVR1 << index)),
2246 cy_readb(base_addr + (CyMSVR2 << index)));
2247 #endif
2248 }
2249 cyy_issue_cmd(base_addr, CyCHAN_CTL | CyDIS_RCVR, index);
2250 /* it may be appropriate to clear _XMIT at
2251 some later date (after testing)!!! */
2252
2253 if (info->tty) {
2254 set_bit(TTY_IO_ERROR, &info->tty->flags);
2255 }
2256 info->flags &= ~ASYNC_INITIALIZED;
2257 CY_UNLOCK(info, flags);
2258 } else {
2259 struct FIRM_ID __iomem *firm_id;
2260 struct ZFW_CTRL __iomem *zfw_ctrl;
2261 struct BOARD_CTRL __iomem *board_ctrl;
2262 struct CH_CTRL __iomem *ch_ctrl;
2263 int retval;
2264
2265 base_addr = cy_card[card].base_addr;
2266 #ifdef CY_DEBUG_OPEN
2267 printk("cyc shutdown Z card %d, channel %d, base_addr %lx\n",
2268 card, channel, (long)base_addr);
2269 #endif
2270
2271 firm_id = base_addr + ID_ADDRESS;
2272 if (!ISZLOADED(cy_card[card])) {
2273 return;
2274 }
2275
2276 zfw_ctrl = cy_card[card].base_addr +
2277 (cy_readl(&firm_id->zfwctrl_addr) & 0xfffff);
2278 board_ctrl = &zfw_ctrl->board_ctrl;
2279 ch_ctrl = zfw_ctrl->ch_ctrl;
2280
2281 CY_LOCK(info, flags);
2282
2283 if (info->xmit_buf) {
2284 unsigned char *temp;
2285 temp = info->xmit_buf;
2286 info->xmit_buf = NULL;
2287 free_page((unsigned long)temp);
2288 }
2289
2290 if (!info->tty || (info->tty->termios->c_cflag & HUPCL)) {
2291 cy_writel(&ch_ctrl[channel].rs_control,
2292 (uclong)(cy_readl(&ch_ctrl[channel].rs_control)&
2293 ~(C_RS_RTS | C_RS_DTR)));
2294 retval = cyz_issue_cmd(&cy_card[info->card], channel,
2295 C_CM_IOCTLM, 0L);
2296 if (retval != 0) {
2297 printk("cyc:shutdown retval on ttyC%d was %x\n",
2298 info->line, retval);
2299 }
2300 #ifdef CY_DEBUG_DTR
2301 printk("cyc:shutdown dropping Z DTR\n");
2302 #endif
2303 }
2304
2305 if (info->tty) {
2306 set_bit(TTY_IO_ERROR, &info->tty->flags);
2307 }
2308 info->flags &= ~ASYNC_INITIALIZED;
2309
2310 CY_UNLOCK(info, flags);
2311 }
2312
2313 #ifdef CY_DEBUG_OPEN
2314 printk(" cyc shutdown done\n");
2315 #endif
2316 } /* shutdown */
2317
2318 /*
2319 * ------------------------------------------------------------
2320 * cy_open() and friends
2321 * ------------------------------------------------------------
2322 */
2323
2324 static int
2325 block_til_ready(struct tty_struct *tty, struct file *filp,
2326 struct cyclades_port *info)
2327 {
2328 DECLARE_WAITQUEUE(wait, current);
2329 struct cyclades_card *cinfo;
2330 unsigned long flags;
2331 int chip, channel, index;
2332 int retval;
2333 void __iomem *base_addr;
2334
2335 cinfo = &cy_card[info->card];
2336 channel = info->line - cinfo->first_line;
2337
2338 /*
2339 * If the device is in the middle of being closed, then block
2340 * until it's done, and then try again.
2341 */
2342 if (tty_hung_up_p(filp) || (info->flags & ASYNC_CLOSING)) {
2343 if (info->flags & ASYNC_CLOSING) {
2344 interruptible_sleep_on(&info->close_wait);
2345 }
2346 return (info->flags & ASYNC_HUP_NOTIFY) ? -EAGAIN: -ERESTARTSYS;
2347 }
2348
2349 /*
2350 * If non-blocking mode is set, then make the check up front
2351 * and then exit.
2352 */
2353 if ((filp->f_flags & O_NONBLOCK) || (tty->flags & (1 << TTY_IO_ERROR))) {
2354 info->flags |= ASYNC_NORMAL_ACTIVE;
2355 return 0;
2356 }
2357
2358 /*
2359 * Block waiting for the carrier detect and the line to become
2360 * free (i.e., not in use by the callout). While we are in
2361 * this loop, info->count is dropped by one, so that
2362 * cy_close() knows when to free things. We restore it upon
2363 * exit, either normal or abnormal.
2364 */
2365 retval = 0;
2366 add_wait_queue(&info->open_wait, &wait);
2367 #ifdef CY_DEBUG_OPEN
2368 printk("cyc block_til_ready before block: ttyC%d, count = %d\n",
2369 info->line, info->count);
2370 /**/
2371 #endif
2372 CY_LOCK(info, flags);
2373 if (!tty_hung_up_p(filp))
2374 info->count--;
2375 CY_UNLOCK(info, flags);
2376 #ifdef CY_DEBUG_COUNT
2377 printk("cyc block_til_ready: (%d): decrementing count to %d\n",
2378 current->pid, info->count);
2379 #endif
2380 info->blocked_open++;
2381
2382 if (!IS_CYC_Z(*cinfo)) {
2383 chip = channel >> 2;
2384 channel &= 0x03;
2385 index = cinfo->bus_index;
2386 base_addr = cinfo->base_addr + (cy_chip_offset[chip] << index);
2387
2388 while (1) {
2389 CY_LOCK(info, flags);
2390 if ((tty->termios->c_cflag & CBAUD)) {
2391 cy_writeb(base_addr + (CyCAR << index),
2392 (u_char) channel);
2393 cy_writeb(base_addr + (CyMSVR1 << index),
2394 CyRTS);
2395 cy_writeb(base_addr + (CyMSVR2 << index),
2396 CyDTR);
2397 #ifdef CY_DEBUG_DTR
2398 printk("cyc:block_til_ready raising DTR\n");
2399 printk(" status: 0x%x, 0x%x\n",
2400 cy_readb(base_addr +
2401 (CyMSVR1 << index)),
2402 cy_readb(base_addr +
2403 (CyMSVR2 << index)));
2404 #endif
2405 }
2406 CY_UNLOCK(info, flags);
2407
2408 set_current_state(TASK_INTERRUPTIBLE);
2409 if (tty_hung_up_p(filp) ||
2410 !(info->flags & ASYNC_INITIALIZED)) {
2411 retval = ((info->flags & ASYNC_HUP_NOTIFY) ?
2412 -EAGAIN : -ERESTARTSYS);
2413 break;
2414 }
2415
2416 CY_LOCK(info, flags);
2417 cy_writeb(base_addr + (CyCAR << index),
2418 (u_char) channel);
2419 if (!(info->flags & ASYNC_CLOSING) && (C_CLOCAL(tty) ||
2420 (cy_readb(base_addr +
2421 (CyMSVR1 << index)) & CyDCD))) {
2422 CY_UNLOCK(info, flags);
2423 break;
2424 }
2425 CY_UNLOCK(info, flags);
2426
2427 if (signal_pending(current)) {
2428 retval = -ERESTARTSYS;
2429 break;
2430 }
2431 #ifdef CY_DEBUG_OPEN
2432 printk("cyc block_til_ready blocking: ttyC%d, "
2433 "count = %d\n",
2434 info->line, info->count);
2435 /**/
2436 #endif
2437 schedule();
2438 }
2439 } else {
2440 struct FIRM_ID __iomem *firm_id;
2441 struct ZFW_CTRL __iomem *zfw_ctrl;
2442 struct BOARD_CTRL __iomem *board_ctrl;
2443 struct CH_CTRL __iomem *ch_ctrl;
2444 int retval;
2445
2446 base_addr = cinfo->base_addr;
2447 firm_id = base_addr + ID_ADDRESS;
2448 if (!ISZLOADED(*cinfo)) {
2449 current->state = TASK_RUNNING;
2450 remove_wait_queue(&info->open_wait, &wait);
2451 return -EINVAL;
2452 }
2453
2454 zfw_ctrl = base_addr + (cy_readl(&firm_id->zfwctrl_addr) &
2455 0xfffff);
2456 board_ctrl = &zfw_ctrl->board_ctrl;
2457 ch_ctrl = zfw_ctrl->ch_ctrl;
2458
2459 while (1) {
2460 if ((tty->termios->c_cflag & CBAUD)) {
2461 cy_writel(&ch_ctrl[channel].rs_control,
2462 cy_readl(&ch_ctrl[channel].
2463 rs_control) | (C_RS_RTS |
2464 C_RS_DTR));
2465 retval = cyz_issue_cmd(&cy_card[info->card],
2466 channel, C_CM_IOCTLM, 0L);
2467 if (retval != 0) {
2468 printk("cyc:block_til_ready retval on "
2469 "ttyC%d was %x\n",
2470 info->line, retval);
2471 }
2472 #ifdef CY_DEBUG_DTR
2473 printk("cyc:block_til_ready raising Z DTR\n");
2474 #endif
2475 }
2476
2477 set_current_state(TASK_INTERRUPTIBLE);
2478 if (tty_hung_up_p(filp) ||
2479 !(info->flags & ASYNC_INITIALIZED)) {
2480 retval = ((info->flags & ASYNC_HUP_NOTIFY) ?
2481 -EAGAIN : -ERESTARTSYS);
2482 break;
2483 }
2484 if (!(info->flags & ASYNC_CLOSING) && (C_CLOCAL(tty) ||
2485 (cy_readl(&ch_ctrl[channel].rs_status) &
2486 C_RS_DCD))) {
2487 break;
2488 }
2489 if (signal_pending(current)) {
2490 retval = -ERESTARTSYS;
2491 break;
2492 }
2493 #ifdef CY_DEBUG_OPEN
2494 printk("cyc block_til_ready blocking: ttyC%d, "
2495 "count = %d\n",
2496 info->line, info->count);
2497 /**/
2498 #endif
2499 schedule();
2500 }
2501 }
2502 current->state = TASK_RUNNING;
2503 remove_wait_queue(&info->open_wait, &wait);
2504 if (!tty_hung_up_p(filp)) {
2505 info->count++;
2506 #ifdef CY_DEBUG_COUNT
2507 printk("cyc:block_til_ready (%d): incrementing count to %d\n",
2508 current->pid, info->count);
2509 #endif
2510 }
2511 info->blocked_open--;
2512 #ifdef CY_DEBUG_OPEN
2513 printk("cyc:block_til_ready after blocking: ttyC%d, count = %d\n",
2514 info->line, info->count);
2515 /**/
2516 #endif
2517 if (retval)
2518 return retval;
2519 info->flags |= ASYNC_NORMAL_ACTIVE;
2520 return 0;
2521 } /* block_til_ready */
2522
2523 /*
2524 * This routine is called whenever a serial port is opened. It
2525 * performs the serial-specific initialization for the tty structure.
2526 */
2527 static int cy_open(struct tty_struct *tty, struct file *filp)
2528 {
2529 struct cyclades_port *info;
2530 int retval, line;
2531
2532 line = tty->index;
2533 if ((line < 0) || (NR_PORTS <= line)) {
2534 return -ENODEV;
2535 }
2536 info = &cy_port[line];
2537 if (info->line < 0) {
2538 return -ENODEV;
2539 }
2540
2541 /* If the card's firmware hasn't been loaded,
2542 treat it as absent from the system. This
2543 will make the user pay attention.
2544 */
2545 if (IS_CYC_Z(cy_card[info->card])) {
2546 struct cyclades_card *cinfo = &cy_card[info->card];
2547 struct FIRM_ID __iomem *firm_id = cinfo->base_addr + ID_ADDRESS;
2548
2549 if (!ISZLOADED(*cinfo)) {
2550 if (((ZE_V1 == cy_readl(
2551 &((struct RUNTIME_9060 __iomem *)
2552 (cinfo->ctl_addr))->mail_box_0)) &&
2553 Z_FPGA_CHECK(*cinfo)) &&
2554 (ZFIRM_HLT == cy_readl(
2555 &firm_id->signature))) {
2556 printk("cyc:Cyclades-Z Error: you need an "
2557 "external power supply for this number "
2558 "of ports.\n\rFirmware halted.\r\n");
2559 } else {
2560 printk("cyc:Cyclades-Z firmware not yet "
2561 "loaded\n");
2562 }
2563 return -ENODEV;
2564 }
2565 #ifdef CONFIG_CYZ_INTR
2566 else {
2567 /* In case this Z board is operating in interrupt mode, its
2568 interrupts should be enabled as soon as the first open
2569 happens to one of its ports. */
2570 if (!cinfo->intr_enabled) {
2571 struct ZFW_CTRL __iomem *zfw_ctrl;
2572 struct BOARD_CTRL __iomem *board_ctrl;
2573
2574 zfw_ctrl = cinfo->base_addr +
2575 (cy_readl(&firm_id->zfwctrl_addr) &
2576 0xfffff);
2577
2578 board_ctrl = &zfw_ctrl->board_ctrl;
2579
2580 /* Enable interrupts on the PLX chip */
2581 cy_writew(cinfo->ctl_addr + 0x68,
2582 cy_readw(cinfo->ctl_addr +
2583 0x68) | 0x0900);
2584 /* Enable interrupts on the FW */
2585 retval = cyz_issue_cmd(cinfo, 0,
2586 C_CM_IRQ_ENBL, 0L);
2587 if (retval != 0) {
2588 printk("cyc:IRQ enable retval was %x\n",
2589 retval);
2590 }
2591 cinfo->nports =
2592 (int)cy_readl(&board_ctrl->n_channel);
2593 cinfo->intr_enabled = 1;
2594 }
2595 }
2596 #endif /* CONFIG_CYZ_INTR */
2597 /* Make sure this Z port really exists in hardware */
2598 if (info->line > (cinfo->first_line + cinfo->nports - 1))
2599 return -ENODEV;
2600 }
2601 #ifdef CY_DEBUG_OTHER
2602 printk("cyc:cy_open ttyC%d\n", info->line); /* */
2603 #endif
2604 tty->driver_data = info;
2605 info->tty = tty;
2606 if (serial_paranoia_check(info, tty->name, "cy_open")) {
2607 return -ENODEV;
2608 }
2609 #ifdef CY_DEBUG_OPEN
2610 printk("cyc:cy_open ttyC%d, count = %d\n", info->line, info->count);
2611 /**/
2612 #endif
2613 info->count++;
2614 #ifdef CY_DEBUG_COUNT
2615 printk("cyc:cy_open (%d): incrementing count to %d\n",
2616 current->pid, info->count);
2617 #endif
2618
2619 /*
2620 * If the port is the middle of closing, bail out now
2621 */
2622 if (tty_hung_up_p(filp) || (info->flags & ASYNC_CLOSING)) {
2623 if (info->flags & ASYNC_CLOSING)
2624 interruptible_sleep_on(&info->close_wait);
2625 return (info->flags & ASYNC_HUP_NOTIFY) ? -EAGAIN: -ERESTARTSYS;
2626 }
2627
2628 /*
2629 * Start up serial port
2630 */
2631 retval = startup(info);
2632 if (retval) {
2633 return retval;
2634 }
2635
2636 retval = block_til_ready(tty, filp, info);
2637 if (retval) {
2638 #ifdef CY_DEBUG_OPEN
2639 printk("cyc:cy_open returning after block_til_ready with %d\n",
2640 retval);
2641 #endif
2642 return retval;
2643 }
2644
2645 info->throttle = 0;
2646
2647 #ifdef CY_DEBUG_OPEN
2648 printk(" cyc:cy_open done\n");
2649 /**/
2650 #endif
2651 return 0;
2652 } /* cy_open */
2653
2654 /*
2655 * cy_wait_until_sent() --- wait until the transmitter is empty
2656 */
2657 static void cy_wait_until_sent(struct tty_struct *tty, int timeout)
2658 {
2659 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
2660 void __iomem *base_addr;
2661 int card, chip, channel, index;
2662 unsigned long orig_jiffies;
2663 int char_time;
2664
2665 if (serial_paranoia_check(info, tty->name, "cy_wait_until_sent"))
2666 return;
2667
2668 if (info->xmit_fifo_size == 0)
2669 return; /* Just in case.... */
2670
2671 orig_jiffies = jiffies;
2672 /*
2673 * Set the check interval to be 1/5 of the estimated time to
2674 * send a single character, and make it at least 1. The check
2675 * interval should also be less than the timeout.
2676 *
2677 * Note: we have to use pretty tight timings here to satisfy
2678 * the NIST-PCTS.
2679 */
2680 char_time = (info->timeout - HZ / 50) / info->xmit_fifo_size;
2681 char_time = char_time / 5;
2682 if (char_time <= 0)
2683 char_time = 1;
2684 if (timeout < 0)
2685 timeout = 0;
2686 if (timeout)
2687 char_time = min(char_time, timeout);
2688 /*
2689 * If the transmitter hasn't cleared in twice the approximate
2690 * amount of time to send the entire FIFO, it probably won't
2691 * ever clear. This assumes the UART isn't doing flow
2692 * control, which is currently the case. Hence, if it ever
2693 * takes longer than info->timeout, this is probably due to a
2694 * UART bug of some kind. So, we clamp the timeout parameter at
2695 * 2*info->timeout.
2696 */
2697 if (!timeout || timeout > 2 * info->timeout)
2698 timeout = 2 * info->timeout;
2699 #ifdef CY_DEBUG_WAIT_UNTIL_SENT
2700 printk("In cy_wait_until_sent(%d) check=%lu...", timeout, char_time);
2701 printk("jiff=%lu...", jiffies);
2702 #endif
2703 card = info->card;
2704 channel = (info->line) - (cy_card[card].first_line);
2705 if (!IS_CYC_Z(cy_card[card])) {
2706 chip = channel >> 2;
2707 channel &= 0x03;
2708 index = cy_card[card].bus_index;
2709 base_addr =
2710 cy_card[card].base_addr + (cy_chip_offset[chip] << index);
2711 while (cy_readb(base_addr + (CySRER << index)) & CyTxRdy) {
2712 #ifdef CY_DEBUG_WAIT_UNTIL_SENT
2713 printk("Not clean (jiff=%lu)...", jiffies);
2714 #endif
2715 if (msleep_interruptible(jiffies_to_msecs(char_time)))
2716 break;
2717 if (timeout && time_after(jiffies, orig_jiffies +
2718 timeout))
2719 break;
2720 }
2721 } else {
2722 /* Nothing to do! */
2723 }
2724 /* Run one more char cycle */
2725 msleep_interruptible(jiffies_to_msecs(char_time * 5));
2726 #ifdef CY_DEBUG_WAIT_UNTIL_SENT
2727 printk("Clean (jiff=%lu)...done\n", jiffies);
2728 #endif
2729 }
2730
2731 /*
2732 * This routine is called when a particular tty device is closed.
2733 */
2734 static void cy_close(struct tty_struct *tty, struct file *filp)
2735 {
2736 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
2737 unsigned long flags;
2738
2739 #ifdef CY_DEBUG_OTHER
2740 printk("cyc:cy_close ttyC%d\n", info->line);
2741 #endif
2742
2743 if (!info || serial_paranoia_check(info, tty->name, "cy_close")) {
2744 return;
2745 }
2746
2747 CY_LOCK(info, flags);
2748 /* If the TTY is being hung up, nothing to do */
2749 if (tty_hung_up_p(filp)) {
2750 CY_UNLOCK(info, flags);
2751 return;
2752 }
2753 #ifdef CY_DEBUG_OPEN
2754 printk("cyc:cy_close ttyC%d, count = %d\n", info->line, info->count);
2755 #endif
2756 if ((tty->count == 1) && (info->count != 1)) {
2757 /*
2758 * Uh, oh. tty->count is 1, which means that the tty
2759 * structure will be freed. Info->count should always
2760 * be one in these conditions. If it's greater than
2761 * one, we've got real problems, since it means the
2762 * serial port won't be shutdown.
2763 */
2764 printk("cyc:cy_close: bad serial port count; tty->count is 1, "
2765 "info->count is %d\n", info->count);
2766 info->count = 1;
2767 }
2768 #ifdef CY_DEBUG_COUNT
2769 printk("cyc:cy_close at (%d): decrementing count to %d\n",
2770 current->pid, info->count - 1);
2771 #endif
2772 if (--info->count < 0) {
2773 #ifdef CY_DEBUG_COUNT
2774 printk("cyc:cyc_close setting count to 0\n");
2775 #endif
2776 info->count = 0;
2777 }
2778 if (info->count) {
2779 CY_UNLOCK(info, flags);
2780 return;
2781 }
2782 info->flags |= ASYNC_CLOSING;
2783
2784 /*
2785 * Now we wait for the transmit buffer to clear; and we notify
2786 * the line discipline to only process XON/XOFF characters.
2787 */
2788 tty->closing = 1;
2789 CY_UNLOCK(info, flags);
2790 if (info->closing_wait != CY_CLOSING_WAIT_NONE) {
2791 tty_wait_until_sent(tty, info->closing_wait);
2792 }
2793 CY_LOCK(info, flags);
2794
2795 if (!IS_CYC_Z(cy_card[info->card])) {
2796 int channel = info->line - cy_card[info->card].first_line;
2797 int index = cy_card[info->card].bus_index;
2798 void __iomem *base_addr = cy_card[info->card].base_addr +
2799 (cy_chip_offset[channel >> 2] << index);
2800 /* Stop accepting input */
2801 channel &= 0x03;
2802 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
2803 cy_writeb(base_addr + (CySRER << index),
2804 cy_readb(base_addr + (CySRER << index)) & ~CyRxData);
2805 if (info->flags & ASYNC_INITIALIZED) {
2806 /* Waiting for on-board buffers to be empty before closing
2807 the port */
2808 CY_UNLOCK(info, flags);
2809 cy_wait_until_sent(tty, info->timeout);
2810 CY_LOCK(info, flags);
2811 }
2812 } else {
2813 #ifdef Z_WAKE
2814 /* Waiting for on-board buffers to be empty before closing the port */
2815 void __iomem *base_addr = cy_card[info->card].base_addr;
2816 struct FIRM_ID __iomem *firm_id = base_addr + ID_ADDRESS;
2817 struct ZFW_CTRL __iomem *zfw_ctrl =
2818 base_addr + (cy_readl(&firm_id->zfwctrl_addr) & 0xfffff);
2819 struct CH_CTRL __iomem *ch_ctrl = zfw_ctrl->ch_ctrl;
2820 int channel = info->line - cy_card[info->card].first_line;
2821 int retval;
2822
2823 if (cy_readl(&ch_ctrl[channel].flow_status) != C_FS_TXIDLE) {
2824 retval = cyz_issue_cmd(&cy_card[info->card], channel,
2825 C_CM_IOCTLW, 0L);
2826 if (retval != 0) {
2827 printk("cyc:cy_close retval on ttyC%d was %x\n",
2828 info->line, retval);
2829 }
2830 CY_UNLOCK(info, flags);
2831 interruptible_sleep_on(&info->shutdown_wait);
2832 CY_LOCK(info, flags);
2833 }
2834 #endif
2835 }
2836
2837 CY_UNLOCK(info, flags);
2838 shutdown(info);
2839 if (tty->driver->flush_buffer)
2840 tty->driver->flush_buffer(tty);
2841 tty_ldisc_flush(tty);
2842 CY_LOCK(info, flags);
2843
2844 tty->closing = 0;
2845 info->event = 0;
2846 info->tty = NULL;
2847 if (info->blocked_open) {
2848 CY_UNLOCK(info, flags);
2849 if (info->close_delay) {
2850 msleep_interruptible(jiffies_to_msecs
2851 (info->close_delay));
2852 }
2853 wake_up_interruptible(&info->open_wait);
2854 CY_LOCK(info, flags);
2855 }
2856 info->flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CLOSING);
2857 wake_up_interruptible(&info->close_wait);
2858
2859 #ifdef CY_DEBUG_OTHER
2860 printk(" cyc:cy_close done\n");
2861 #endif
2862
2863 CY_UNLOCK(info, flags);
2864 } /* cy_close */
2865
2866 /* This routine gets called when tty_write has put something into
2867 * the write_queue. The characters may come from user space or
2868 * kernel space.
2869 *
2870 * This routine will return the number of characters actually
2871 * accepted for writing.
2872 *
2873 * If the port is not already transmitting stuff, start it off by
2874 * enabling interrupts. The interrupt service routine will then
2875 * ensure that the characters are sent.
2876 * If the port is already active, there is no need to kick it.
2877 *
2878 */
2879 static int cy_write(struct tty_struct *tty, const unsigned char *buf, int count)
2880 {
2881 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
2882 unsigned long flags;
2883 int c, ret = 0;
2884
2885 #ifdef CY_DEBUG_IO
2886 printk("cyc:cy_write ttyC%d\n", info->line); /* */
2887 #endif
2888
2889 if (serial_paranoia_check(info, tty->name, "cy_write")) {
2890 return 0;
2891 }
2892
2893 if (!info->xmit_buf)
2894 return 0;
2895
2896 CY_LOCK(info, flags);
2897 while (1) {
2898 c = min(count, min((int)(SERIAL_XMIT_SIZE - info->xmit_cnt - 1),
2899 (int)(SERIAL_XMIT_SIZE - info->xmit_head)));
2900
2901 if (c <= 0)
2902 break;
2903
2904 memcpy(info->xmit_buf + info->xmit_head, buf, c);
2905 info->xmit_head = (info->xmit_head + c) &
2906 (SERIAL_XMIT_SIZE - 1);
2907 info->xmit_cnt += c;
2908 buf += c;
2909 count -= c;
2910 ret += c;
2911 }
2912 CY_UNLOCK(info, flags);
2913
2914 info->idle_stats.xmit_bytes += ret;
2915 info->idle_stats.xmit_idle = jiffies;
2916
2917 if (info->xmit_cnt && !tty->stopped && !tty->hw_stopped) {
2918 start_xmit(info);
2919 }
2920 return ret;
2921 } /* cy_write */
2922
2923 /*
2924 * This routine is called by the kernel to write a single
2925 * character to the tty device. If the kernel uses this routine,
2926 * it must call the flush_chars() routine (if defined) when it is
2927 * done stuffing characters into the driver. If there is no room
2928 * in the queue, the character is ignored.
2929 */
2930 static void cy_put_char(struct tty_struct *tty, unsigned char ch)
2931 {
2932 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
2933 unsigned long flags;
2934
2935 #ifdef CY_DEBUG_IO
2936 printk("cyc:cy_put_char ttyC%d\n", info->line);
2937 #endif
2938
2939 if (serial_paranoia_check(info, tty->name, "cy_put_char"))
2940 return;
2941
2942 if (!info->xmit_buf)
2943 return;
2944
2945 CY_LOCK(info, flags);
2946 if (info->xmit_cnt >= (int)(SERIAL_XMIT_SIZE - 1)) {
2947 CY_UNLOCK(info, flags);
2948 return;
2949 }
2950
2951 info->xmit_buf[info->xmit_head++] = ch;
2952 info->xmit_head &= SERIAL_XMIT_SIZE - 1;
2953 info->xmit_cnt++;
2954 info->idle_stats.xmit_bytes++;
2955 info->idle_stats.xmit_idle = jiffies;
2956 CY_UNLOCK(info, flags);
2957 } /* cy_put_char */
2958
2959 /*
2960 * This routine is called by the kernel after it has written a
2961 * series of characters to the tty device using put_char().
2962 */
2963 static void cy_flush_chars(struct tty_struct *tty)
2964 {
2965 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
2966
2967 #ifdef CY_DEBUG_IO
2968 printk("cyc:cy_flush_chars ttyC%d\n", info->line); /* */
2969 #endif
2970
2971 if (serial_paranoia_check(info, tty->name, "cy_flush_chars"))
2972 return;
2973
2974 if (info->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped ||
2975 !info->xmit_buf)
2976 return;
2977
2978 start_xmit(info);
2979 } /* cy_flush_chars */
2980
2981 /*
2982 * This routine returns the numbers of characters the tty driver
2983 * will accept for queuing to be written. This number is subject
2984 * to change as output buffers get emptied, or if the output flow
2985 * control is activated.
2986 */
2987 static int cy_write_room(struct tty_struct *tty)
2988 {
2989 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
2990 int ret;
2991
2992 #ifdef CY_DEBUG_IO
2993 printk("cyc:cy_write_room ttyC%d\n", info->line); /* */
2994 #endif
2995
2996 if (serial_paranoia_check(info, tty->name, "cy_write_room"))
2997 return 0;
2998 ret = SERIAL_XMIT_SIZE - info->xmit_cnt - 1;
2999 if (ret < 0)
3000 ret = 0;
3001 return ret;
3002 } /* cy_write_room */
3003
3004 static int cy_chars_in_buffer(struct tty_struct *tty)
3005 {
3006 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
3007 int card, channel;
3008
3009 if (serial_paranoia_check(info, tty->name, "cy_chars_in_buffer"))
3010 return 0;
3011
3012 card = info->card;
3013 channel = (info->line) - (cy_card[card].first_line);
3014
3015 #ifdef Z_EXT_CHARS_IN_BUFFER
3016 if (!IS_CYC_Z(cy_card[card])) {
3017 #endif /* Z_EXT_CHARS_IN_BUFFER */
3018 #ifdef CY_DEBUG_IO
3019 printk("cyc:cy_chars_in_buffer ttyC%d %d\n", info->line, info->xmit_cnt); /* */
3020 #endif
3021 return info->xmit_cnt;
3022 #ifdef Z_EXT_CHARS_IN_BUFFER
3023 } else {
3024 static volatile struct FIRM_ID *firm_id;
3025 static volatile struct ZFW_CTRL *zfw_ctrl;
3026 static volatile struct CH_CTRL *ch_ctrl;
3027 static volatile struct BUF_CTRL *buf_ctrl;
3028 int char_count;
3029 volatile uclong tx_put, tx_get, tx_bufsize;
3030
3031 firm_id = cy_card[card].base_addr + ID_ADDRESS;
3032 zfw_ctrl = cy_card[card].base_addr +
3033 (cy_readl(&firm_id->zfwctrl_addr) & 0xfffff);
3034 ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]);
3035 buf_ctrl = &(zfw_ctrl->buf_ctrl[channel]);
3036
3037 tx_get = cy_readl(&buf_ctrl->tx_get);
3038 tx_put = cy_readl(&buf_ctrl->tx_put);
3039 tx_bufsize = cy_readl(&buf_ctrl->tx_bufsize);
3040 if (tx_put >= tx_get)
3041 char_count = tx_put - tx_get;
3042 else
3043 char_count = tx_put - tx_get + tx_bufsize;
3044 #ifdef CY_DEBUG_IO
3045 printk("cyc:cy_chars_in_buffer ttyC%d %d\n", info->line, info->xmit_cnt + char_count); /* */
3046 #endif
3047 return info->xmit_cnt + char_count;
3048 }
3049 #endif /* Z_EXT_CHARS_IN_BUFFER */
3050 } /* cy_chars_in_buffer */
3051
3052 /*
3053 * ------------------------------------------------------------
3054 * cy_ioctl() and friends
3055 * ------------------------------------------------------------
3056 */
3057
3058 static void cyy_baud_calc(struct cyclades_port *info, uclong baud)
3059 {
3060 int co, co_val, bpr;
3061 uclong cy_clock = ((info->chip_rev >= CD1400_REV_J) ? 60000000 :
3062 25000000);
3063
3064 if (baud == 0) {
3065 info->tbpr = info->tco = info->rbpr = info->rco = 0;
3066 return;
3067 }
3068
3069 /* determine which prescaler to use */
3070 for (co = 4, co_val = 2048; co; co--, co_val >>= 2) {
3071 if (cy_clock / co_val / baud > 63)
3072 break;
3073 }
3074
3075 bpr = (cy_clock / co_val * 2 / baud + 1) / 2;
3076 if (bpr > 255)
3077 bpr = 255;
3078
3079 info->tbpr = info->rbpr = bpr;
3080 info->tco = info->rco = co;
3081 }
3082
3083 /*
3084 * This routine finds or computes the various line characteristics.
3085 * It used to be called config_setup
3086 */
3087 static void set_line_char(struct cyclades_port *info)
3088 {
3089 unsigned long flags;
3090 void __iomem *base_addr;
3091 int card, chip, channel, index;
3092 unsigned cflag, iflag;
3093 unsigned short chip_number;
3094 int baud, baud_rate = 0;
3095 int i;
3096
3097 if (!info->tty || !info->tty->termios) {
3098 return;
3099 }
3100 if (info->line == -1) {
3101 return;
3102 }
3103 cflag = info->tty->termios->c_cflag;
3104 iflag = info->tty->termios->c_iflag;
3105
3106 /*
3107 * Set up the tty->alt_speed kludge
3108 */
3109 if (info->tty) {
3110 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
3111 info->tty->alt_speed = 57600;
3112 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
3113 info->tty->alt_speed = 115200;
3114 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
3115 info->tty->alt_speed = 230400;
3116 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
3117 info->tty->alt_speed = 460800;
3118 }
3119
3120 card = info->card;
3121 channel = (info->line) - (cy_card[card].first_line);
3122 chip_number = channel / 4;
3123
3124 if (!IS_CYC_Z(cy_card[card])) {
3125
3126 index = cy_card[card].bus_index;
3127
3128 /* baud rate */
3129 baud = tty_get_baud_rate(info->tty);
3130 if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
3131 ASYNC_SPD_CUST) {
3132 if (info->custom_divisor)
3133 baud_rate = info->baud / info->custom_divisor;
3134 else
3135 baud_rate = info->baud;
3136 } else if (baud > CD1400_MAX_SPEED) {
3137 baud = CD1400_MAX_SPEED;
3138 }
3139 /* find the baud index */
3140 for (i = 0; i < 20; i++) {
3141 if (baud == baud_table[i]) {
3142 break;
3143 }
3144 }
3145 if (i == 20) {
3146 i = 19; /* CD1400_MAX_SPEED */
3147 }
3148
3149 if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
3150 ASYNC_SPD_CUST) {
3151 cyy_baud_calc(info, baud_rate);
3152 } else {
3153 if (info->chip_rev >= CD1400_REV_J) {
3154 /* It is a CD1400 rev. J or later */
3155 info->tbpr = baud_bpr_60[i]; /* Tx BPR */
3156 info->tco = baud_co_60[i]; /* Tx CO */
3157 info->rbpr = baud_bpr_60[i]; /* Rx BPR */
3158 info->rco = baud_co_60[i]; /* Rx CO */
3159 } else {
3160 info->tbpr = baud_bpr_25[i]; /* Tx BPR */
3161 info->tco = baud_co_25[i]; /* Tx CO */
3162 info->rbpr = baud_bpr_25[i]; /* Rx BPR */
3163 info->rco = baud_co_25[i]; /* Rx CO */
3164 }
3165 }
3166 if (baud_table[i] == 134) {
3167 /* get it right for 134.5 baud */
3168 info->timeout = (info->xmit_fifo_size * HZ * 30 / 269) +
3169 2;
3170 } else if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
3171 ASYNC_SPD_CUST) {
3172 info->timeout = (info->xmit_fifo_size * HZ * 15 /
3173 baud_rate) + 2;
3174 } else if (baud_table[i]) {
3175 info->timeout = (info->xmit_fifo_size * HZ * 15 /
3176 baud_table[i]) + 2;
3177 /* this needs to be propagated into the card info */
3178 } else {
3179 info->timeout = 0;
3180 }
3181 /* By tradition (is it a standard?) a baud rate of zero
3182 implies the line should be/has been closed. A bit
3183 later in this routine such a test is performed. */
3184
3185 /* byte size and parity */
3186 info->cor5 = 0;
3187 info->cor4 = 0;
3188 /* receive threshold */
3189 info->cor3 = (info->default_threshold ?
3190 info->default_threshold : baud_cor3[i]);
3191 info->cor2 = CyETC;
3192 switch (cflag & CSIZE) {
3193 case CS5:
3194 info->cor1 = Cy_5_BITS;
3195 break;
3196 case CS6:
3197 info->cor1 = Cy_6_BITS;
3198 break;
3199 case CS7:
3200 info->cor1 = Cy_7_BITS;
3201 break;
3202 case CS8:
3203 info->cor1 = Cy_8_BITS;
3204 break;
3205 }
3206 if (cflag & CSTOPB) {
3207 info->cor1 |= Cy_2_STOP;
3208 }
3209 if (cflag & PARENB) {
3210 if (cflag & PARODD) {
3211 info->cor1 |= CyPARITY_O;
3212 } else {
3213 info->cor1 |= CyPARITY_E;
3214 }
3215 } else {
3216 info->cor1 |= CyPARITY_NONE;
3217 }
3218
3219 /* CTS flow control flag */
3220 if (cflag & CRTSCTS) {
3221 info->flags |= ASYNC_CTS_FLOW;
3222 info->cor2 |= CyCtsAE;
3223 } else {
3224 info->flags &= ~ASYNC_CTS_FLOW;
3225 info->cor2 &= ~CyCtsAE;
3226 }
3227 if (cflag & CLOCAL)
3228 info->flags &= ~ASYNC_CHECK_CD;
3229 else
3230 info->flags |= ASYNC_CHECK_CD;
3231
3232 /***********************************************
3233 The hardware option, CyRtsAO, presents RTS when
3234 the chip has characters to send. Since most modems
3235 use RTS as reverse (inbound) flow control, this
3236 option is not used. If inbound flow control is
3237 necessary, DTR can be programmed to provide the
3238 appropriate signals for use with a non-standard
3239 cable. Contact Marcio Saito for details.
3240 ***********************************************/
3241
3242 chip = channel >> 2;
3243 channel &= 0x03;
3244 base_addr = cy_card[card].base_addr +
3245 (cy_chip_offset[chip] << index);
3246
3247 CY_LOCK(info, flags);
3248 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
3249
3250 /* tx and rx baud rate */
3251
3252 cy_writeb(base_addr + (CyTCOR << index), info->tco);
3253 cy_writeb(base_addr + (CyTBPR << index), info->tbpr);
3254 cy_writeb(base_addr + (CyRCOR << index), info->rco);
3255 cy_writeb(base_addr + (CyRBPR << index), info->rbpr);
3256
3257 /* set line characteristics according configuration */
3258
3259 cy_writeb(base_addr + (CySCHR1 << index),
3260 START_CHAR(info->tty));
3261 cy_writeb(base_addr + (CySCHR2 << index), STOP_CHAR(info->tty));
3262 cy_writeb(base_addr + (CyCOR1 << index), info->cor1);
3263 cy_writeb(base_addr + (CyCOR2 << index), info->cor2);
3264 cy_writeb(base_addr + (CyCOR3 << index), info->cor3);
3265 cy_writeb(base_addr + (CyCOR4 << index), info->cor4);
3266 cy_writeb(base_addr + (CyCOR5 << index), info->cor5);
3267
3268 cyy_issue_cmd(base_addr, CyCOR_CHANGE | CyCOR1ch | CyCOR2ch |
3269 CyCOR3ch, index);
3270
3271 cy_writeb(base_addr + (CyCAR << index), (u_char) channel); /* !!! Is this needed? */
3272 cy_writeb(base_addr + (CyRTPR << index),
3273 (info->default_timeout ? info->default_timeout : 0x02));
3274 /* 10ms rx timeout */
3275
3276 if (C_CLOCAL(info->tty)) {
3277 /* without modem intr */
3278 cy_writeb(base_addr + (CySRER << index),
3279 cy_readb(base_addr +
3280 (CySRER << index)) | CyMdmCh);
3281 /* act on 1->0 modem transitions */
3282 if ((cflag & CRTSCTS) && info->rflow) {
3283 cy_writeb(base_addr + (CyMCOR1 << index),
3284 (CyCTS | rflow_thr[i]));
3285 } else {
3286 cy_writeb(base_addr + (CyMCOR1 << index),
3287 CyCTS);
3288 }
3289 /* act on 0->1 modem transitions */
3290 cy_writeb(base_addr + (CyMCOR2 << index), CyCTS);
3291 } else {
3292 /* without modem intr */
3293 cy_writeb(base_addr + (CySRER << index),
3294 cy_readb(base_addr +
3295 (CySRER << index)) | CyMdmCh);
3296 /* act on 1->0 modem transitions */
3297 if ((cflag & CRTSCTS) && info->rflow) {
3298 cy_writeb(base_addr + (CyMCOR1 << index),
3299 (CyDSR | CyCTS | CyRI | CyDCD |
3300 rflow_thr[i]));
3301 } else {
3302 cy_writeb(base_addr + (CyMCOR1 << index),
3303 CyDSR | CyCTS | CyRI | CyDCD);
3304 }
3305 /* act on 0->1 modem transitions */
3306 cy_writeb(base_addr + (CyMCOR2 << index),
3307 CyDSR | CyCTS | CyRI | CyDCD);
3308 }
3309
3310 if (i == 0) { /* baud rate is zero, turn off line */
3311 if (info->rtsdtr_inv) {
3312 cy_writeb(base_addr + (CyMSVR1 << index),
3313 ~CyRTS);
3314 } else {
3315 cy_writeb(base_addr + (CyMSVR2 << index),
3316 ~CyDTR);
3317 }
3318 #ifdef CY_DEBUG_DTR
3319 printk("cyc:set_line_char dropping DTR\n");
3320 printk(" status: 0x%x, 0x%x\n",
3321 cy_readb(base_addr + (CyMSVR1 << index)),
3322 cy_readb(base_addr + (CyMSVR2 << index)));
3323 #endif
3324 } else {
3325 if (info->rtsdtr_inv) {
3326 cy_writeb(base_addr + (CyMSVR1 << index),
3327 CyRTS);
3328 } else {
3329 cy_writeb(base_addr + (CyMSVR2 << index),
3330 CyDTR);
3331 }
3332 #ifdef CY_DEBUG_DTR
3333 printk("cyc:set_line_char raising DTR\n");
3334 printk(" status: 0x%x, 0x%x\n",
3335 cy_readb(base_addr + (CyMSVR1 << index)),
3336 cy_readb(base_addr + (CyMSVR2 << index)));
3337 #endif
3338 }
3339
3340 if (info->tty) {
3341 clear_bit(TTY_IO_ERROR, &info->tty->flags);
3342 }
3343 CY_UNLOCK(info, flags);
3344
3345 } else {
3346 struct FIRM_ID __iomem *firm_id;
3347 struct ZFW_CTRL __iomem *zfw_ctrl;
3348 struct BOARD_CTRL __iomem *board_ctrl;
3349 struct CH_CTRL __iomem *ch_ctrl;
3350 struct BUF_CTRL __iomem *buf_ctrl;
3351 uclong sw_flow;
3352 int retval;
3353
3354 firm_id = cy_card[card].base_addr + ID_ADDRESS;
3355 if (!ISZLOADED(cy_card[card])) {
3356 return;
3357 }
3358
3359 zfw_ctrl = cy_card[card].base_addr +
3360 (cy_readl(&firm_id->zfwctrl_addr) & 0xfffff);
3361 board_ctrl = &zfw_ctrl->board_ctrl;
3362 ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]);
3363 buf_ctrl = &zfw_ctrl->buf_ctrl[channel];
3364
3365 /* baud rate */
3366 baud = tty_get_baud_rate(info->tty);
3367 if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
3368 ASYNC_SPD_CUST) {
3369 if (info->custom_divisor)
3370 baud_rate = info->baud / info->custom_divisor;
3371 else
3372 baud_rate = info->baud;
3373 } else if (baud > CYZ_MAX_SPEED) {
3374 baud = CYZ_MAX_SPEED;
3375 }
3376 cy_writel(&ch_ctrl->comm_baud, baud);
3377
3378 if (baud == 134) {
3379 /* get it right for 134.5 baud */
3380 info->timeout = (info->xmit_fifo_size * HZ * 30 / 269) +
3381 2;
3382 } else if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
3383 ASYNC_SPD_CUST) {
3384 info->timeout = (info->xmit_fifo_size * HZ * 15 /
3385 baud_rate) + 2;
3386 } else if (baud) {
3387 info->timeout = (info->xmit_fifo_size * HZ * 15 /
3388 baud) + 2;
3389 /* this needs to be propagated into the card info */
3390 } else {
3391 info->timeout = 0;
3392 }
3393
3394 /* byte size and parity */
3395 switch (cflag & CSIZE) {
3396 case CS5:
3397 cy_writel(&ch_ctrl->comm_data_l, C_DL_CS5);
3398 break;
3399 case CS6:
3400 cy_writel(&ch_ctrl->comm_data_l, C_DL_CS6);
3401 break;
3402 case CS7:
3403 cy_writel(&ch_ctrl->comm_data_l, C_DL_CS7);
3404 break;
3405 case CS8:
3406 cy_writel(&ch_ctrl->comm_data_l, C_DL_CS8);
3407 break;
3408 }
3409 if (cflag & CSTOPB) {
3410 cy_writel(&ch_ctrl->comm_data_l,
3411 cy_readl(&ch_ctrl->comm_data_l) | C_DL_2STOP);
3412 } else {
3413 cy_writel(&ch_ctrl->comm_data_l,
3414 cy_readl(&ch_ctrl->comm_data_l) | C_DL_1STOP);
3415 }
3416 if (cflag & PARENB) {
3417 if (cflag & PARODD) {
3418 cy_writel(&ch_ctrl->comm_parity, C_PR_ODD);
3419 } else {
3420 cy_writel(&ch_ctrl->comm_parity, C_PR_EVEN);
3421 }
3422 } else {
3423 cy_writel(&ch_ctrl->comm_parity, C_PR_NONE);
3424 }
3425
3426 /* CTS flow control flag */
3427 if (cflag & CRTSCTS) {
3428 cy_writel(&ch_ctrl->hw_flow,
3429 cy_readl(&ch_ctrl->
3430 hw_flow) | C_RS_CTS | C_RS_RTS);
3431 } else {
3432 cy_writel(&ch_ctrl->hw_flow,
3433 cy_readl(&ch_ctrl->
3434 hw_flow) & ~(C_RS_CTS | C_RS_RTS));
3435 }
3436 /* As the HW flow control is done in firmware, the driver
3437 doesn't need to care about it */
3438 info->flags &= ~ASYNC_CTS_FLOW;
3439
3440 /* XON/XOFF/XANY flow control flags */
3441 sw_flow = 0;
3442 if (iflag & IXON) {
3443 sw_flow |= C_FL_OXX;
3444 if (iflag & IXANY)
3445 sw_flow |= C_FL_OIXANY;
3446 }
3447 cy_writel(&ch_ctrl->sw_flow, sw_flow);
3448
3449 retval = cyz_issue_cmd(&cy_card[card], channel, C_CM_IOCTL, 0L);
3450 if (retval != 0) {
3451 printk("cyc:set_line_char retval on ttyC%d was %x\n",
3452 info->line, retval);
3453 }
3454
3455 /* CD sensitivity */
3456 if (cflag & CLOCAL) {
3457 info->flags &= ~ASYNC_CHECK_CD;
3458 } else {
3459 info->flags |= ASYNC_CHECK_CD;
3460 }
3461
3462 if (baud == 0) { /* baud rate is zero, turn off line */
3463 cy_writel(&ch_ctrl->rs_control,
3464 cy_readl(&ch_ctrl->rs_control) & ~C_RS_DTR);
3465 #ifdef CY_DEBUG_DTR
3466 printk("cyc:set_line_char dropping Z DTR\n");
3467 #endif
3468 } else {
3469 cy_writel(&ch_ctrl->rs_control,
3470 cy_readl(&ch_ctrl->rs_control) | C_RS_DTR);
3471 #ifdef CY_DEBUG_DTR
3472 printk("cyc:set_line_char raising Z DTR\n");
3473 #endif
3474 }
3475
3476 retval = cyz_issue_cmd(&cy_card[card], channel, C_CM_IOCTLM,0L);
3477 if (retval != 0) {
3478 printk("cyc:set_line_char(2) retval on ttyC%d was %x\n",
3479 info->line, retval);
3480 }
3481
3482 if (info->tty) {
3483 clear_bit(TTY_IO_ERROR, &info->tty->flags);
3484 }
3485 }
3486 } /* set_line_char */
3487
3488 static int
3489 get_serial_info(struct cyclades_port *info,
3490 struct serial_struct __user * retinfo)
3491 {
3492 struct serial_struct tmp;
3493 struct cyclades_card *cinfo = &cy_card[info->card];
3494
3495 if (!retinfo)
3496 return -EFAULT;
3497 memset(&tmp, 0, sizeof(tmp));
3498 tmp.type = info->type;
3499 tmp.line = info->line;
3500 tmp.port = info->card * 0x100 + info->line - cinfo->first_line;
3501 tmp.irq = cinfo->irq;
3502 tmp.flags = info->flags;
3503 tmp.close_delay = info->close_delay;
3504 tmp.closing_wait = info->closing_wait;
3505 tmp.baud_base = info->baud;
3506 tmp.custom_divisor = info->custom_divisor;
3507 tmp.hub6 = 0; /*!!! */
3508 return copy_to_user(retinfo, &tmp, sizeof(*retinfo)) ? -EFAULT : 0;
3509 } /* get_serial_info */
3510
3511 static int
3512 set_serial_info(struct cyclades_port *info,
3513 struct serial_struct __user * new_info)
3514 {
3515 struct serial_struct new_serial;
3516 struct cyclades_port old_info;
3517
3518 if (copy_from_user(&new_serial, new_info, sizeof(new_serial)))
3519 return -EFAULT;
3520 old_info = *info;
3521
3522 if (!capable(CAP_SYS_ADMIN)) {
3523 if (new_serial.close_delay != info->close_delay ||
3524 new_serial.baud_base != info->baud ||
3525 (new_serial.flags & ASYNC_FLAGS &
3526 ~ASYNC_USR_MASK) !=
3527 (info->flags & ASYNC_FLAGS & ~ASYNC_USR_MASK))
3528 return -EPERM;
3529 info->flags = (info->flags & ~ASYNC_USR_MASK) |
3530 (new_serial.flags & ASYNC_USR_MASK);
3531 info->baud = new_serial.baud_base;
3532 info->custom_divisor = new_serial.custom_divisor;
3533 goto check_and_exit;
3534 }
3535
3536 /*
3537 * OK, past this point, all the error checking has been done.
3538 * At this point, we start making changes.....
3539 */
3540
3541 info->baud = new_serial.baud_base;
3542 info->custom_divisor = new_serial.custom_divisor;
3543 info->flags = (info->flags & ~ASYNC_FLAGS) |
3544 (new_serial.flags & ASYNC_FLAGS);
3545 info->close_delay = new_serial.close_delay * HZ / 100;
3546 info->closing_wait = new_serial.closing_wait * HZ / 100;
3547
3548 check_and_exit:
3549 if (info->flags & ASYNC_INITIALIZED) {
3550 set_line_char(info);
3551 return 0;
3552 } else {
3553 return startup(info);
3554 }
3555 } /* set_serial_info */
3556
3557 /*
3558 * get_lsr_info - get line status register info
3559 *
3560 * Purpose: Let user call ioctl() to get info when the UART physically
3561 * is emptied. On bus types like RS485, the transmitter must
3562 * release the bus after transmitting. This must be done when
3563 * the transmit shift register is empty, not be done when the
3564 * transmit holding register is empty. This functionality
3565 * allows an RS485 driver to be written in user space.
3566 */
3567 static int get_lsr_info(struct cyclades_port *info, unsigned int __user * value)
3568 {
3569 int card, chip, channel, index;
3570 unsigned char status;
3571 unsigned int result;
3572 unsigned long flags;
3573 void __iomem *base_addr;
3574
3575 card = info->card;
3576 channel = (info->line) - (cy_card[card].first_line);
3577 if (!IS_CYC_Z(cy_card[card])) {
3578 chip = channel >> 2;
3579 channel &= 0x03;
3580 index = cy_card[card].bus_index;
3581 base_addr =
3582 cy_card[card].base_addr + (cy_chip_offset[chip] << index);
3583
3584 CY_LOCK(info, flags);
3585 status = cy_readb(base_addr + (CySRER << index)) &
3586 (CyTxRdy | CyTxMpty);
3587 CY_UNLOCK(info, flags);
3588 result = (status ? 0 : TIOCSER_TEMT);
3589 } else {
3590 /* Not supported yet */
3591 return -EINVAL;
3592 }
3593 return put_user(result, (unsigned long __user *)value);
3594 }
3595
3596 static int cy_tiocmget(struct tty_struct *tty, struct file *file)
3597 {
3598 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
3599 int card, chip, channel, index;
3600 void __iomem *base_addr;
3601 unsigned long flags;
3602 unsigned char status;
3603 unsigned long lstatus;
3604 unsigned int result;
3605 struct FIRM_ID __iomem *firm_id;
3606 struct ZFW_CTRL __iomem *zfw_ctrl;
3607 struct BOARD_CTRL __iomem *board_ctrl;
3608 struct CH_CTRL __iomem *ch_ctrl;
3609
3610 if (serial_paranoia_check(info, tty->name, __FUNCTION__))
3611 return -ENODEV;
3612
3613 card = info->card;
3614 channel = (info->line) - (cy_card[card].first_line);
3615 if (!IS_CYC_Z(cy_card[card])) {
3616 chip = channel >> 2;
3617 channel &= 0x03;
3618 index = cy_card[card].bus_index;
3619 base_addr =
3620 cy_card[card].base_addr + (cy_chip_offset[chip] << index);
3621
3622 CY_LOCK(info, flags);
3623 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
3624 status = cy_readb(base_addr + (CyMSVR1 << index));
3625 status |= cy_readb(base_addr + (CyMSVR2 << index));
3626 CY_UNLOCK(info, flags);
3627
3628 if (info->rtsdtr_inv) {
3629 result = ((status & CyRTS) ? TIOCM_DTR : 0) |
3630 ((status & CyDTR) ? TIOCM_RTS : 0);
3631 } else {
3632 result = ((status & CyRTS) ? TIOCM_RTS : 0) |
3633 ((status & CyDTR) ? TIOCM_DTR : 0);
3634 }
3635 result |= ((status & CyDCD) ? TIOCM_CAR : 0) |
3636 ((status & CyRI) ? TIOCM_RNG : 0) |
3637 ((status & CyDSR) ? TIOCM_DSR : 0) |
3638 ((status & CyCTS) ? TIOCM_CTS : 0);
3639 } else {
3640 base_addr = cy_card[card].base_addr;
3641
3642 if (cy_card[card].num_chips != -1) {
3643 return -EINVAL;
3644 }
3645
3646 firm_id = cy_card[card].base_addr + ID_ADDRESS;
3647 if (ISZLOADED(cy_card[card])) {
3648 zfw_ctrl = cy_card[card].base_addr +
3649 (cy_readl(&firm_id->zfwctrl_addr) & 0xfffff);
3650 board_ctrl = &zfw_ctrl->board_ctrl;
3651 ch_ctrl = zfw_ctrl->ch_ctrl;
3652 lstatus = cy_readl(&ch_ctrl[channel].rs_status);
3653 result = ((lstatus & C_RS_RTS) ? TIOCM_RTS : 0) |
3654 ((lstatus & C_RS_DTR) ? TIOCM_DTR : 0) |
3655 ((lstatus & C_RS_DCD) ? TIOCM_CAR : 0) |
3656 ((lstatus & C_RS_RI) ? TIOCM_RNG : 0) |
3657 ((lstatus & C_RS_DSR) ? TIOCM_DSR : 0) |
3658 ((lstatus & C_RS_CTS) ? TIOCM_CTS : 0);
3659 } else {
3660 result = 0;
3661 return -ENODEV;
3662 }
3663
3664 }
3665 return result;
3666 } /* cy_tiomget */
3667
3668 static int
3669 cy_tiocmset(struct tty_struct *tty, struct file *file,
3670 unsigned int set, unsigned int clear)
3671 {
3672 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
3673 int card, chip, channel, index;
3674 void __iomem *base_addr;
3675 unsigned long flags;
3676 struct FIRM_ID __iomem *firm_id;
3677 struct ZFW_CTRL __iomem *zfw_ctrl;
3678 struct BOARD_CTRL __iomem *board_ctrl;
3679 struct CH_CTRL __iomem *ch_ctrl;
3680 int retval;
3681
3682 if (serial_paranoia_check(info, tty->name, __FUNCTION__))
3683 return -ENODEV;
3684
3685 card = info->card;
3686 channel = (info->line) - (cy_card[card].first_line);
3687 if (!IS_CYC_Z(cy_card[card])) {
3688 chip = channel >> 2;
3689 channel &= 0x03;
3690 index = cy_card[card].bus_index;
3691 base_addr =
3692 cy_card[card].base_addr + (cy_chip_offset[chip] << index);
3693
3694 if (set & TIOCM_RTS) {
3695 CY_LOCK(info, flags);
3696 cy_writeb(base_addr + (CyCAR << index),
3697 (u_char) channel);
3698 if (info->rtsdtr_inv) {
3699 cy_writeb(base_addr + (CyMSVR2 << index),
3700 CyDTR);
3701 } else {
3702 cy_writeb(base_addr + (CyMSVR1 << index),
3703 CyRTS);
3704 }
3705 CY_UNLOCK(info, flags);
3706 }
3707 if (clear & TIOCM_RTS) {
3708 CY_LOCK(info, flags);
3709 cy_writeb(base_addr + (CyCAR << index),
3710 (u_char) channel);
3711 if (info->rtsdtr_inv) {
3712 cy_writeb(base_addr + (CyMSVR2 << index),
3713 ~CyDTR);
3714 } else {
3715 cy_writeb(base_addr + (CyMSVR1 << index),
3716 ~CyRTS);
3717 }
3718 CY_UNLOCK(info, flags);
3719 }
3720 if (set & TIOCM_DTR) {
3721 CY_LOCK(info, flags);
3722 cy_writeb(base_addr + (CyCAR << index),
3723 (u_char) channel);
3724 if (info->rtsdtr_inv) {
3725 cy_writeb(base_addr + (CyMSVR1 << index),
3726 CyRTS);
3727 } else {
3728 cy_writeb(base_addr + (CyMSVR2 << index),
3729 CyDTR);
3730 }
3731 #ifdef CY_DEBUG_DTR
3732 printk("cyc:set_modem_info raising DTR\n");
3733 printk(" status: 0x%x, 0x%x\n",
3734 cy_readb(base_addr + (CyMSVR1 << index)),
3735 cy_readb(base_addr + (CyMSVR2 << index)));
3736 #endif
3737 CY_UNLOCK(info, flags);
3738 }
3739 if (clear & TIOCM_DTR) {
3740 CY_LOCK(info, flags);
3741 cy_writeb(base_addr + (CyCAR << index),
3742 (u_char) channel);
3743 if (info->rtsdtr_inv) {
3744 cy_writeb(base_addr + (CyMSVR1 << index),
3745 ~CyRTS);
3746 } else {
3747 cy_writeb(base_addr + (CyMSVR2 << index),
3748 ~CyDTR);
3749 }
3750
3751 #ifdef CY_DEBUG_DTR
3752 printk("cyc:set_modem_info dropping DTR\n");
3753 printk(" status: 0x%x, 0x%x\n",
3754 cy_readb(base_addr + (CyMSVR1 << index)),
3755 cy_readb(base_addr + (CyMSVR2 << index)));
3756 #endif
3757 CY_UNLOCK(info, flags);
3758 }
3759 } else {
3760 base_addr = cy_card[card].base_addr;
3761
3762 firm_id = cy_card[card].base_addr + ID_ADDRESS;
3763 if (ISZLOADED(cy_card[card])) {
3764 zfw_ctrl = cy_card[card].base_addr +
3765 (cy_readl(&firm_id->zfwctrl_addr) & 0xfffff);
3766 board_ctrl = &zfw_ctrl->board_ctrl;
3767 ch_ctrl = zfw_ctrl->ch_ctrl;
3768
3769 if (set & TIOCM_RTS) {
3770 CY_LOCK(info, flags);
3771 cy_writel(&ch_ctrl[channel].rs_control,
3772 cy_readl(&ch_ctrl[channel].
3773 rs_control) | C_RS_RTS);
3774 CY_UNLOCK(info, flags);
3775 }
3776 if (clear & TIOCM_RTS) {
3777 CY_LOCK(info, flags);
3778 cy_writel(&ch_ctrl[channel].rs_control,
3779 cy_readl(&ch_ctrl[channel].
3780 rs_control) & ~C_RS_RTS);
3781 CY_UNLOCK(info, flags);
3782 }
3783 if (set & TIOCM_DTR) {
3784 CY_LOCK(info, flags);
3785 cy_writel(&ch_ctrl[channel].rs_control,
3786 cy_readl(&ch_ctrl[channel].
3787 rs_control) | C_RS_DTR);
3788 #ifdef CY_DEBUG_DTR
3789 printk("cyc:set_modem_info raising Z DTR\n");
3790 #endif
3791 CY_UNLOCK(info, flags);
3792 }
3793 if (clear & TIOCM_DTR) {
3794 CY_LOCK(info, flags);
3795 cy_writel(&ch_ctrl[channel].rs_control,
3796 cy_readl(&ch_ctrl[channel].
3797 rs_control) & ~C_RS_DTR);
3798 #ifdef CY_DEBUG_DTR
3799 printk("cyc:set_modem_info clearing Z DTR\n");
3800 #endif
3801 CY_UNLOCK(info, flags);
3802 }
3803 } else {
3804 return -ENODEV;
3805 }
3806 CY_LOCK(info, flags);
3807 retval = cyz_issue_cmd(&cy_card[info->card],
3808 channel, C_CM_IOCTLM, 0L);
3809 if (retval != 0) {
3810 printk("cyc:set_modem_info retval on ttyC%d was %x\n",
3811 info->line, retval);
3812 }
3813 CY_UNLOCK(info, flags);
3814 }
3815 return 0;
3816 } /* cy_tiocmset */
3817
3818 /*
3819 * cy_break() --- routine which turns the break handling on or off
3820 */
3821 static void cy_break(struct tty_struct *tty, int break_state)
3822 {
3823 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
3824 unsigned long flags;
3825
3826 if (serial_paranoia_check(info, tty->name, "cy_break"))
3827 return;
3828
3829 CY_LOCK(info, flags);
3830 if (!IS_CYC_Z(cy_card[info->card])) {
3831 /* Let the transmit ISR take care of this (since it
3832 requires stuffing characters into the output stream).
3833 */
3834 if (break_state == -1) {
3835 if (!info->breakon) {
3836 info->breakon = 1;
3837 if (!info->xmit_cnt) {
3838 CY_UNLOCK(info, flags);
3839 start_xmit(info);
3840 CY_LOCK(info, flags);
3841 }
3842 }
3843 } else {
3844 if (!info->breakoff) {
3845 info->breakoff = 1;
3846 if (!info->xmit_cnt) {
3847 CY_UNLOCK(info, flags);
3848 start_xmit(info);
3849 CY_LOCK(info, flags);
3850 }
3851 }
3852 }
3853 } else {
3854 int retval;
3855
3856 if (break_state == -1) {
3857 retval = cyz_issue_cmd(&cy_card[info->card],
3858 info->line - cy_card[info->card].first_line,
3859 C_CM_SET_BREAK, 0L);
3860 if (retval != 0) {
3861 printk("cyc:cy_break (set) retval on ttyC%d "
3862 "was %x\n", info->line, retval);
3863 }
3864 } else {
3865 retval = cyz_issue_cmd(&cy_card[info->card],
3866 info->line - cy_card[info->card].first_line,
3867 C_CM_CLR_BREAK, 0L);
3868 if (retval != 0) {
3869 printk("cyc:cy_break (clr) retval on ttyC%d "
3870 "was %x\n", info->line, retval);
3871 }
3872 }
3873 }
3874 CY_UNLOCK(info, flags);
3875 } /* cy_break */
3876
3877 static int
3878 get_mon_info(struct cyclades_port *info, struct cyclades_monitor __user * mon)
3879 {
3880
3881 if (copy_to_user(mon, &info->mon, sizeof(struct cyclades_monitor)))
3882 return -EFAULT;
3883 info->mon.int_count = 0;
3884 info->mon.char_count = 0;
3885 info->mon.char_max = 0;
3886 info->mon.char_last = 0;
3887 return 0;
3888 } /* get_mon_info */
3889
3890 static int set_threshold(struct cyclades_port *info, unsigned long value)
3891 {
3892 void __iomem *base_addr;
3893 int card, channel, chip, index;
3894 unsigned long flags;
3895
3896 card = info->card;
3897 channel = info->line - cy_card[card].first_line;
3898 if (!IS_CYC_Z(cy_card[card])) {
3899 chip = channel >> 2;
3900 channel &= 0x03;
3901 index = cy_card[card].bus_index;
3902 base_addr =
3903 cy_card[card].base_addr + (cy_chip_offset[chip] << index);
3904
3905 info->cor3 &= ~CyREC_FIFO;
3906 info->cor3 |= value & CyREC_FIFO;
3907
3908 CY_LOCK(info, flags);
3909 cy_writeb(base_addr + (CyCOR3 << index), info->cor3);
3910 cyy_issue_cmd(base_addr, CyCOR_CHANGE | CyCOR3ch, index);
3911 CY_UNLOCK(info, flags);
3912 } else {
3913 /* Nothing to do! */
3914 }
3915 return 0;
3916 } /* set_threshold */
3917
3918 static int
3919 get_threshold(struct cyclades_port *info, unsigned long __user * value)
3920 {
3921 void __iomem *base_addr;
3922 int card, channel, chip, index;
3923 unsigned long tmp;
3924
3925 card = info->card;
3926 channel = info->line - cy_card[card].first_line;
3927 if (!IS_CYC_Z(cy_card[card])) {
3928 chip = channel >> 2;
3929 channel &= 0x03;
3930 index = cy_card[card].bus_index;
3931 base_addr =
3932 cy_card[card].base_addr + (cy_chip_offset[chip] << index);
3933
3934 tmp = cy_readb(base_addr + (CyCOR3 << index)) & CyREC_FIFO;
3935 return put_user(tmp, value);
3936 } else {
3937 /* Nothing to do! */
3938 return 0;
3939 }
3940 } /* get_threshold */
3941
3942 static int
3943 set_default_threshold(struct cyclades_port *info, unsigned long value)
3944 {
3945 info->default_threshold = value & 0x0f;
3946 return 0;
3947 } /* set_default_threshold */
3948
3949 static int
3950 get_default_threshold(struct cyclades_port *info, unsigned long __user * value)
3951 {
3952 return put_user(info->default_threshold, value);
3953 } /* get_default_threshold */
3954
3955 static int set_timeout(struct cyclades_port *info, unsigned long value)
3956 {
3957 void __iomem *base_addr;
3958 int card, channel, chip, index;
3959 unsigned long flags;
3960
3961 card = info->card;
3962 channel = info->line - cy_card[card].first_line;
3963 if (!IS_CYC_Z(cy_card[card])) {
3964 chip = channel >> 2;
3965 channel &= 0x03;
3966 index = cy_card[card].bus_index;
3967 base_addr =
3968 cy_card[card].base_addr + (cy_chip_offset[chip] << index);
3969
3970 CY_LOCK(info, flags);
3971 cy_writeb(base_addr + (CyRTPR << index), value & 0xff);
3972 CY_UNLOCK(info, flags);
3973 } else {
3974 /* Nothing to do! */
3975 }
3976 return 0;
3977 } /* set_timeout */
3978
3979 static int get_timeout(struct cyclades_port *info, unsigned long __user * value)
3980 {
3981 void __iomem *base_addr;
3982 int card, channel, chip, index;
3983 unsigned long tmp;
3984
3985 card = info->card;
3986 channel = info->line - cy_card[card].first_line;
3987 if (!IS_CYC_Z(cy_card[card])) {
3988 chip = channel >> 2;
3989 channel &= 0x03;
3990 index = cy_card[card].bus_index;
3991 base_addr =
3992 cy_card[card].base_addr + (cy_chip_offset[chip] << index);
3993
3994 tmp = cy_readb(base_addr + (CyRTPR << index));
3995 return put_user(tmp, value);
3996 } else {
3997 /* Nothing to do! */
3998 return 0;
3999 }
4000 } /* get_timeout */
4001
4002 static int set_default_timeout(struct cyclades_port *info, unsigned long value)
4003 {
4004 info->default_timeout = value & 0xff;
4005 return 0;
4006 } /* set_default_timeout */
4007
4008 static int
4009 get_default_timeout(struct cyclades_port *info, unsigned long __user * value)
4010 {
4011 return put_user(info->default_timeout, value);
4012 } /* get_default_timeout */
4013
4014 /*
4015 * This routine allows the tty driver to implement device-
4016 * specific ioctl's. If the ioctl number passed in cmd is
4017 * not recognized by the driver, it should return ENOIOCTLCMD.
4018 */
4019 static int
4020 cy_ioctl(struct tty_struct *tty, struct file *file,
4021 unsigned int cmd, unsigned long arg)
4022 {
4023 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
4024 struct cyclades_icount cprev, cnow; /* kernel counter temps */
4025 struct serial_icounter_struct __user *p_cuser; /* user space */
4026 int ret_val = 0;
4027 unsigned long flags;
4028 void __user *argp = (void __user *)arg;
4029
4030 if (serial_paranoia_check(info, tty->name, "cy_ioctl"))
4031 return -ENODEV;
4032
4033 #ifdef CY_DEBUG_OTHER
4034 printk("cyc:cy_ioctl ttyC%d, cmd = %x arg = %lx\n", info->line, cmd, arg); /* */
4035 #endif
4036
4037 switch (cmd) {
4038 case CYGETMON:
4039 ret_val = get_mon_info(info, argp);
4040 break;
4041 case CYGETTHRESH:
4042 ret_val = get_threshold(info, argp);
4043 break;
4044 case CYSETTHRESH:
4045 ret_val = set_threshold(info, arg);
4046 break;
4047 case CYGETDEFTHRESH:
4048 ret_val = get_default_threshold(info, argp);
4049 break;
4050 case CYSETDEFTHRESH:
4051 ret_val = set_default_threshold(info, arg);
4052 break;
4053 case CYGETTIMEOUT:
4054 ret_val = get_timeout(info, argp);
4055 break;
4056 case CYSETTIMEOUT:
4057 ret_val = set_timeout(info, arg);
4058 break;
4059 case CYGETDEFTIMEOUT:
4060 ret_val = get_default_timeout(info, argp);
4061 break;
4062 case CYSETDEFTIMEOUT:
4063 ret_val = set_default_timeout(info, arg);
4064 break;
4065 case CYSETRFLOW:
4066 info->rflow = (int)arg;
4067 ret_val = 0;
4068 break;
4069 case CYGETRFLOW:
4070 ret_val = info->rflow;
4071 break;
4072 case CYSETRTSDTR_INV:
4073 info->rtsdtr_inv = (int)arg;
4074 ret_val = 0;
4075 break;
4076 case CYGETRTSDTR_INV:
4077 ret_val = info->rtsdtr_inv;
4078 break;
4079 case CYGETCARDINFO:
4080 if (copy_to_user(argp, &cy_card[info->card],
4081 sizeof(struct cyclades_card))) {
4082 ret_val = -EFAULT;
4083 break;
4084 }
4085 ret_val = 0;
4086 break;
4087 case CYGETCD1400VER:
4088 ret_val = info->chip_rev;
4089 break;
4090 #ifndef CONFIG_CYZ_INTR
4091 case CYZSETPOLLCYCLE:
4092 cyz_polling_cycle = (arg * HZ) / 1000;
4093 ret_val = 0;
4094 break;
4095 case CYZGETPOLLCYCLE:
4096 ret_val = (cyz_polling_cycle * 1000) / HZ;
4097 break;
4098 #endif /* CONFIG_CYZ_INTR */
4099 case CYSETWAIT:
4100 info->closing_wait = (unsigned short)arg *HZ / 100;
4101 ret_val = 0;
4102 break;
4103 case CYGETWAIT:
4104 ret_val = info->closing_wait / (HZ / 100);
4105 break;
4106 case TIOCGSERIAL:
4107 ret_val = get_serial_info(info, argp);
4108 break;
4109 case TIOCSSERIAL:
4110 ret_val = set_serial_info(info, argp);
4111 break;
4112 case TIOCSERGETLSR: /* Get line status register */
4113 ret_val = get_lsr_info(info, argp);
4114 break;
4115 /*
4116 * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
4117 * - mask passed in arg for lines of interest
4118 * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
4119 * Caller should use TIOCGICOUNT to see which one it was
4120 */
4121 case TIOCMIWAIT:
4122 CY_LOCK(info, flags);
4123 /* note the counters on entry */
4124 cprev = info->icount;
4125 CY_UNLOCK(info, flags);
4126 while (1) {
4127 interruptible_sleep_on(&info->delta_msr_wait);
4128 /* see if a signal did it */
4129 if (signal_pending(current)) {
4130 return -ERESTARTSYS;
4131 }
4132
4133 CY_LOCK(info, flags);
4134 cnow = info->icount; /* atomic copy */
4135 CY_UNLOCK(info, flags);
4136
4137 if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
4138 cnow.dcd == cprev.dcd && cnow.cts == cprev.cts) {
4139 return -EIO; /* no change => error */
4140 }
4141 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
4142 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
4143 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) ||
4144 ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts))) {
4145 return 0;
4146 }
4147 cprev = cnow;
4148 }
4149 /* NOTREACHED */
4150
4151 /*
4152 * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
4153 * Return: write counters to the user passed counter struct
4154 * NB: both 1->0 and 0->1 transitions are counted except for
4155 * RI where only 0->1 is counted.
4156 */
4157 case TIOCGICOUNT:
4158 CY_LOCK(info, flags);
4159 cnow = info->icount;
4160 CY_UNLOCK(info, flags);
4161 p_cuser = argp;
4162 ret_val = put_user(cnow.cts, &p_cuser->cts);
4163 if (ret_val)
4164 return ret_val;
4165 ret_val = put_user(cnow.dsr, &p_cuser->dsr);
4166 if (ret_val)
4167 return ret_val;
4168 ret_val = put_user(cnow.rng, &p_cuser->rng);
4169 if (ret_val)
4170 return ret_val;
4171 ret_val = put_user(cnow.dcd, &p_cuser->dcd);
4172 if (ret_val)
4173 return ret_val;
4174 ret_val = put_user(cnow.rx, &p_cuser->rx);
4175 if (ret_val)
4176 return ret_val;
4177 ret_val = put_user(cnow.tx, &p_cuser->tx);
4178 if (ret_val)
4179 return ret_val;
4180 ret_val = put_user(cnow.frame, &p_cuser->frame);
4181 if (ret_val)
4182 return ret_val;
4183 ret_val = put_user(cnow.overrun, &p_cuser->overrun);
4184 if (ret_val)
4185 return ret_val;
4186 ret_val = put_user(cnow.parity, &p_cuser->parity);
4187 if (ret_val)
4188 return ret_val;
4189 ret_val = put_user(cnow.brk, &p_cuser->brk);
4190 if (ret_val)
4191 return ret_val;
4192 ret_val = put_user(cnow.buf_overrun, &p_cuser->buf_overrun);
4193 if (ret_val)
4194 return ret_val;
4195 ret_val = 0;
4196 break;
4197 default:
4198 ret_val = -ENOIOCTLCMD;
4199 }
4200
4201 #ifdef CY_DEBUG_OTHER
4202 printk(" cyc:cy_ioctl done\n");
4203 #endif
4204
4205 return ret_val;
4206 } /* cy_ioctl */
4207
4208 /*
4209 * This routine allows the tty driver to be notified when
4210 * device's termios settings have changed. Note that a
4211 * well-designed tty driver should be prepared to accept the case
4212 * where old == NULL, and try to do something rational.
4213 */
4214 static void cy_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
4215 {
4216 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
4217
4218 #ifdef CY_DEBUG_OTHER
4219 printk("cyc:cy_set_termios ttyC%d\n", info->line);
4220 #endif
4221
4222 if (tty->termios->c_cflag == old_termios->c_cflag &&
4223 (tty->termios->c_iflag & (IXON | IXANY)) ==
4224 (old_termios->c_iflag & (IXON | IXANY)))
4225 return;
4226 set_line_char(info);
4227
4228 if ((old_termios->c_cflag & CRTSCTS) &&
4229 !(tty->termios->c_cflag & CRTSCTS)) {
4230 tty->hw_stopped = 0;
4231 cy_start(tty);
4232 }
4233 #if 0
4234 /*
4235 * No need to wake up processes in open wait, since they
4236 * sample the CLOCAL flag once, and don't recheck it.
4237 * XXX It's not clear whether the current behavior is correct
4238 * or not. Hence, this may change.....
4239 */
4240 if (!(old_termios->c_cflag & CLOCAL) &&
4241 (tty->termios->c_cflag & CLOCAL))
4242 wake_up_interruptible(&info->open_wait);
4243 #endif
4244 } /* cy_set_termios */
4245
4246 /* This function is used to send a high-priority XON/XOFF character to
4247 the device.
4248 */
4249 static void cy_send_xchar(struct tty_struct *tty, char ch)
4250 {
4251 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
4252 int card, channel;
4253
4254 if (serial_paranoia_check(info, tty->name, "cy_send_xchar"))
4255 return;
4256
4257 info->x_char = ch;
4258
4259 if (ch)
4260 cy_start(tty);
4261
4262 card = info->card;
4263 channel = info->line - cy_card[card].first_line;
4264
4265 if (IS_CYC_Z(cy_card[card])) {
4266 if (ch == STOP_CHAR(tty))
4267 cyz_issue_cmd(&cy_card[card], channel, C_CM_SENDXOFF,
4268 0L);
4269 else if (ch == START_CHAR(tty))
4270 cyz_issue_cmd(&cy_card[card], channel, C_CM_SENDXON,
4271 0L);
4272 }
4273 }
4274
4275 /* This routine is called by the upper-layer tty layer to signal
4276 that incoming characters should be throttled because the input
4277 buffers are close to full.
4278 */
4279 static void cy_throttle(struct tty_struct *tty)
4280 {
4281 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
4282 unsigned long flags;
4283 void __iomem *base_addr;
4284 int card, chip, channel, index;
4285
4286 #ifdef CY_DEBUG_THROTTLE
4287 char buf[64];
4288
4289 printk("cyc:throttle %s: %d....ttyC%d\n", tty_name(tty, buf),
4290 tty->ldisc.chars_in_buffer(tty), info->line);
4291 #endif
4292
4293 if (serial_paranoia_check(info, tty->name, "cy_throttle")) {
4294 return;
4295 }
4296
4297 card = info->card;
4298
4299 if (I_IXOFF(tty)) {
4300 if (!IS_CYC_Z(cy_card[card]))
4301 cy_send_xchar(tty, STOP_CHAR(tty));
4302 else
4303 info->throttle = 1;
4304 }
4305
4306 if (tty->termios->c_cflag & CRTSCTS) {
4307 channel = info->line - cy_card[card].first_line;
4308 if (!IS_CYC_Z(cy_card[card])) {
4309 chip = channel >> 2;
4310 channel &= 0x03;
4311 index = cy_card[card].bus_index;
4312 base_addr = cy_card[card].base_addr +
4313 (cy_chip_offset[chip] << index);
4314
4315 CY_LOCK(info, flags);
4316 cy_writeb(base_addr + (CyCAR << index),
4317 (u_char) channel);
4318 if (info->rtsdtr_inv) {
4319 cy_writeb(base_addr + (CyMSVR2 << index),
4320 ~CyDTR);
4321 } else {
4322 cy_writeb(base_addr + (CyMSVR1 << index),
4323 ~CyRTS);
4324 }
4325 CY_UNLOCK(info, flags);
4326 } else {
4327 info->throttle = 1;
4328 }
4329 }
4330 } /* cy_throttle */
4331
4332 /*
4333 * This routine notifies the tty driver that it should signal
4334 * that characters can now be sent to the tty without fear of
4335 * overrunning the input buffers of the line disciplines.
4336 */
4337 static void cy_unthrottle(struct tty_struct *tty)
4338 {
4339 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
4340 unsigned long flags;
4341 void __iomem *base_addr;
4342 int card, chip, channel, index;
4343
4344 #ifdef CY_DEBUG_THROTTLE
4345 char buf[64];
4346
4347 printk("cyc:unthrottle %s: %d....ttyC%d\n", tty_name(tty, buf),
4348 tty->ldisc.chars_in_buffer(tty), info->line);
4349 #endif
4350
4351 if (serial_paranoia_check(info, tty->name, "cy_unthrottle")) {
4352 return;
4353 }
4354
4355 if (I_IXOFF(tty)) {
4356 if (info->x_char)
4357 info->x_char = 0;
4358 else
4359 cy_send_xchar(tty, START_CHAR(tty));
4360 }
4361
4362 if (tty->termios->c_cflag & CRTSCTS) {
4363 card = info->card;
4364 channel = info->line - cy_card[card].first_line;
4365 if (!IS_CYC_Z(cy_card[card])) {
4366 chip = channel >> 2;
4367 channel &= 0x03;
4368 index = cy_card[card].bus_index;
4369 base_addr = cy_card[card].base_addr +
4370 (cy_chip_offset[chip] << index);
4371
4372 CY_LOCK(info, flags);
4373 cy_writeb(base_addr + (CyCAR << index),
4374 (u_char) channel);
4375 if (info->rtsdtr_inv) {
4376 cy_writeb(base_addr + (CyMSVR2 << index),
4377 CyDTR);
4378 } else {
4379 cy_writeb(base_addr + (CyMSVR1 << index),
4380 CyRTS);
4381 }
4382 CY_UNLOCK(info, flags);
4383 } else {
4384 info->throttle = 0;
4385 }
4386 }
4387 } /* cy_unthrottle */
4388
4389 /* cy_start and cy_stop provide software output flow control as a
4390 function of XON/XOFF, software CTS, and other such stuff.
4391 */
4392 static void cy_stop(struct tty_struct *tty)
4393 {
4394 struct cyclades_card *cinfo;
4395 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
4396 void __iomem *base_addr;
4397 int chip, channel, index;
4398 unsigned long flags;
4399
4400 #ifdef CY_DEBUG_OTHER
4401 printk("cyc:cy_stop ttyC%d\n", info->line); /* */
4402 #endif
4403
4404 if (serial_paranoia_check(info, tty->name, "cy_stop"))
4405 return;
4406
4407 cinfo = &cy_card[info->card];
4408 channel = info->line - cinfo->first_line;
4409 if (!IS_CYC_Z(*cinfo)) {
4410 index = cinfo->bus_index;
4411 chip = channel >> 2;
4412 channel &= 0x03;
4413 base_addr = cy_card[info->card].base_addr +
4414 (cy_chip_offset[chip] << index);
4415
4416 CY_LOCK(info, flags);
4417 cy_writeb(base_addr + (CyCAR << index),
4418 (u_char)(channel & 0x0003)); /* index channel */
4419 cy_writeb(base_addr + (CySRER << index),
4420 cy_readb(base_addr + (CySRER << index)) & ~CyTxRdy);
4421 CY_UNLOCK(info, flags);
4422 } else {
4423 /* Nothing to do! */
4424 }
4425 } /* cy_stop */
4426
4427 static void cy_start(struct tty_struct *tty)
4428 {
4429 struct cyclades_card *cinfo;
4430 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
4431 void __iomem *base_addr;
4432 int chip, channel, index;
4433 unsigned long flags;
4434
4435 #ifdef CY_DEBUG_OTHER
4436 printk("cyc:cy_start ttyC%d\n", info->line); /* */
4437 #endif
4438
4439 if (serial_paranoia_check(info, tty->name, "cy_start"))
4440 return;
4441
4442 cinfo = &cy_card[info->card];
4443 channel = info->line - cinfo->first_line;
4444 index = cinfo->bus_index;
4445 if (!IS_CYC_Z(*cinfo)) {
4446 chip = channel >> 2;
4447 channel &= 0x03;
4448 base_addr = cy_card[info->card].base_addr +
4449 (cy_chip_offset[chip] << index);
4450
4451 CY_LOCK(info, flags);
4452 cy_writeb(base_addr + (CyCAR << index), (u_char) (channel & 0x0003)); /* index channel */
4453 cy_writeb(base_addr + (CySRER << index),
4454 cy_readb(base_addr + (CySRER << index)) | CyTxRdy);
4455 CY_UNLOCK(info, flags);
4456 } else {
4457 /* Nothing to do! */
4458 }
4459 } /* cy_start */
4460
4461 static void cy_flush_buffer(struct tty_struct *tty)
4462 {
4463 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
4464 int card, channel, retval;
4465 unsigned long flags;
4466
4467 #ifdef CY_DEBUG_IO
4468 printk("cyc:cy_flush_buffer ttyC%d\n", info->line); /* */
4469 #endif
4470
4471 if (serial_paranoia_check(info, tty->name, "cy_flush_buffer"))
4472 return;
4473
4474 card = info->card;
4475 channel = (info->line) - (cy_card[card].first_line);
4476
4477 CY_LOCK(info, flags);
4478 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
4479 CY_UNLOCK(info, flags);
4480
4481 if (IS_CYC_Z(cy_card[card])) { /* If it is a Z card, flush the on-board
4482 buffers as well */
4483 CY_LOCK(info, flags);
4484 retval =
4485 cyz_issue_cmd(&cy_card[card], channel, C_CM_FLUSH_TX, 0L);
4486 if (retval != 0) {
4487 printk("cyc: flush_buffer retval on ttyC%d was %x\n",
4488 info->line, retval);
4489 }
4490 CY_UNLOCK(info, flags);
4491 }
4492 tty_wakeup(tty);
4493 } /* cy_flush_buffer */
4494
4495 /*
4496 * cy_hangup() --- called by tty_hangup() when a hangup is signaled.
4497 */
4498 static void cy_hangup(struct tty_struct *tty)
4499 {
4500 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
4501
4502 #ifdef CY_DEBUG_OTHER
4503 printk("cyc:cy_hangup ttyC%d\n", info->line); /* */
4504 #endif
4505
4506 if (serial_paranoia_check(info, tty->name, "cy_hangup"))
4507 return;
4508
4509 cy_flush_buffer(tty);
4510 shutdown(info);
4511 info->event = 0;
4512 info->count = 0;
4513 #ifdef CY_DEBUG_COUNT
4514 printk("cyc:cy_hangup (%d): setting count to 0\n", current->pid);
4515 #endif
4516 info->tty = NULL;
4517 info->flags &= ~ASYNC_NORMAL_ACTIVE;
4518 wake_up_interruptible(&info->open_wait);
4519 } /* cy_hangup */
4520
4521 /*
4522 * ---------------------------------------------------------------------
4523 * cy_init() and friends
4524 *
4525 * cy_init() is called at boot-time to initialize the serial driver.
4526 * ---------------------------------------------------------------------
4527 */
4528
4529 /* initialize chips on Cyclom-Y card -- return number of valid
4530 chips (which is number of ports/4) */
4531 static unsigned short __init
4532 cyy_init_card(void __iomem * true_base_addr, int index)
4533 {
4534 unsigned int chip_number;
4535 void __iomem *base_addr;
4536
4537 cy_writeb(true_base_addr + (Cy_HwReset << index), 0);
4538 /* Cy_HwReset is 0x1400 */
4539 cy_writeb(true_base_addr + (Cy_ClrIntr << index), 0);
4540 /* Cy_ClrIntr is 0x1800 */
4541 udelay(500L);
4542
4543 for (chip_number = 0; chip_number < CyMAX_CHIPS_PER_CARD; chip_number++) {
4544 base_addr =
4545 true_base_addr + (cy_chip_offset[chip_number] << index);
4546 mdelay(1);
4547 if (cy_readb(base_addr + (CyCCR << index)) != 0x00) {
4548 /*************
4549 printk(" chip #%d at %#6lx is never idle (CCR != 0)\n",
4550 chip_number, (unsigned long)base_addr);
4551 *************/
4552 return chip_number;
4553 }
4554
4555 cy_writeb(base_addr + (CyGFRCR << index), 0);
4556 udelay(10L);
4557
4558 /* The Cyclom-16Y does not decode address bit 9 and therefore
4559 cannot distinguish between references to chip 0 and a non-
4560 existent chip 4. If the preceding clearing of the supposed
4561 chip 4 GFRCR register appears at chip 0, there is no chip 4
4562 and this must be a Cyclom-16Y, not a Cyclom-32Ye.
4563 */
4564 if (chip_number == 4 && cy_readb(true_base_addr +
4565 (cy_chip_offset[0] << index) +
4566 (CyGFRCR << index)) == 0) {
4567 return chip_number;
4568 }
4569
4570 cy_writeb(base_addr + (CyCCR << index), CyCHIP_RESET);
4571 mdelay(1);
4572
4573 if (cy_readb(base_addr + (CyGFRCR << index)) == 0x00) {
4574 /*
4575 printk(" chip #%d at %#6lx is not responding ",
4576 chip_number, (unsigned long)base_addr);
4577 printk("(GFRCR stayed 0)\n",
4578 */
4579 return chip_number;
4580 }
4581 if ((0xf0 & (cy_readb(base_addr + (CyGFRCR << index)))) !=
4582 0x40) {
4583 /*
4584 printk(" chip #%d at %#6lx is not valid (GFRCR == "
4585 "%#2x)\n",
4586 chip_number, (unsigned long)base_addr,
4587 base_addr[CyGFRCR<<index]);
4588 */
4589 return chip_number;
4590 }
4591 cy_writeb(base_addr + (CyGCR << index), CyCH0_SERIAL);
4592 if (cy_readb(base_addr + (CyGFRCR << index)) >= CD1400_REV_J) {
4593 /* It is a CD1400 rev. J or later */
4594 /* Impossible to reach 5ms with this chip.
4595 Changed to 2ms instead (f = 500 Hz). */
4596 cy_writeb(base_addr + (CyPPR << index), CyCLOCK_60_2MS);
4597 } else {
4598 /* f = 200 Hz */
4599 cy_writeb(base_addr + (CyPPR << index), CyCLOCK_25_5MS);
4600 }
4601
4602 /*
4603 printk(" chip #%d at %#6lx is rev 0x%2x\n",
4604 chip_number, (unsigned long)base_addr,
4605 cy_readb(base_addr+(CyGFRCR<<index)));
4606 */
4607 }
4608 return chip_number;
4609 } /* cyy_init_card */
4610
4611 /*
4612 * ---------------------------------------------------------------------
4613 * cy_detect_isa() - Probe for Cyclom-Y/ISA boards.
4614 * sets global variables and return the number of ISA boards found.
4615 * ---------------------------------------------------------------------
4616 */
4617 static int __init cy_detect_isa(void)
4618 {
4619 #ifdef CONFIG_ISA
4620 unsigned short cy_isa_irq, nboard;
4621 void __iomem *cy_isa_address;
4622 unsigned short i, j, cy_isa_nchan;
4623 #ifdef MODULE
4624 int isparam = 0;
4625 #endif
4626
4627 nboard = 0;
4628
4629 #ifdef MODULE
4630 /* Check for module parameters */
4631 for (i = 0; i < NR_CARDS; i++) {
4632 if (maddr[i] || i) {
4633 isparam = 1;
4634 cy_isa_addresses[i] = maddr[i];
4635 }
4636 if (!maddr[i])
4637 break;
4638 }
4639 #endif
4640
4641 /* scan the address table probing for Cyclom-Y/ISA boards */
4642 for (i = 0; i < NR_ISA_ADDRS; i++) {
4643 unsigned int isa_address = cy_isa_addresses[i];
4644 if (isa_address == 0x0000) {
4645 return nboard;
4646 }
4647
4648 /* probe for CD1400... */
4649 cy_isa_address = ioremap(isa_address, CyISA_Ywin);
4650 cy_isa_nchan = CyPORTS_PER_CHIP *
4651 cyy_init_card(cy_isa_address, 0);
4652 if (cy_isa_nchan == 0) {
4653 continue;
4654 }
4655 #ifdef MODULE
4656 if (isparam && irq[i])
4657 cy_isa_irq = irq[i];
4658 else
4659 #endif
4660 /* find out the board's irq by probing */
4661 cy_isa_irq = detect_isa_irq(cy_isa_address);
4662 if (cy_isa_irq == 0) {
4663 printk("Cyclom-Y/ISA found at 0x%lx ",
4664 (unsigned long)cy_isa_address);
4665 printk("but the IRQ could not be detected.\n");
4666 continue;
4667 }
4668
4669 if ((cy_next_channel + cy_isa_nchan) > NR_PORTS) {
4670 printk("Cyclom-Y/ISA found at 0x%lx ",
4671 (unsigned long)cy_isa_address);
4672 printk("but no more channels are available.\n");
4673 printk("Change NR_PORTS in cyclades.c and recompile "
4674 "kernel.\n");
4675 return nboard;
4676 }
4677 /* fill the next cy_card structure available */
4678 for (j = 0; j < NR_CARDS; j++) {
4679 if (cy_card[j].base_addr == 0)
4680 break;
4681 }
4682 if (j == NR_CARDS) { /* no more cy_cards available */
4683 printk("Cyclom-Y/ISA found at 0x%lx ",
4684 (unsigned long)cy_isa_address);
4685 printk("but no more cards can be used .\n");
4686 printk("Change NR_CARDS in cyclades.c and recompile "
4687 "kernel.\n");
4688 return nboard;
4689 }
4690
4691 /* allocate IRQ */
4692 if (request_irq(cy_isa_irq, cyy_interrupt,
4693 IRQF_DISABLED, "Cyclom-Y", &cy_card[j])) {
4694 printk("Cyclom-Y/ISA found at 0x%lx ",
4695 (unsigned long)cy_isa_address);
4696 printk("but could not allocate IRQ#%d.\n", cy_isa_irq);
4697 return nboard;
4698 }
4699
4700 /* set cy_card */
4701 cy_card[j].base_addr = cy_isa_address;
4702 cy_card[j].ctl_addr = NULL;
4703 cy_card[j].irq = (int)cy_isa_irq;
4704 cy_card[j].bus_index = 0;
4705 cy_card[j].first_line = cy_next_channel;
4706 cy_card[j].num_chips = cy_isa_nchan / 4;
4707 nboard++;
4708
4709 /* print message */
4710 printk("Cyclom-Y/ISA #%d: 0x%lx-0x%lx, IRQ%d, ",
4711 j + 1, (unsigned long)cy_isa_address,
4712 (unsigned long)(cy_isa_address + (CyISA_Ywin - 1)),
4713 cy_isa_irq);
4714 printk("%d channels starting from port %d.\n",
4715 cy_isa_nchan, cy_next_channel);
4716 cy_next_channel += cy_isa_nchan;
4717 }
4718 return nboard;
4719 #else
4720 return 0;
4721 #endif /* CONFIG_ISA */
4722 } /* cy_detect_isa */
4723
4724 static void plx_init(void __iomem * addr, uclong initctl)
4725 {
4726 /* Reset PLX */
4727 cy_writel(addr + initctl, cy_readl(addr + initctl) | 0x40000000);
4728 udelay(100L);
4729 cy_writel(addr + initctl, cy_readl(addr + initctl) & ~0x40000000);
4730
4731 /* Reload Config. Registers from EEPROM */
4732 cy_writel(addr + initctl, cy_readl(addr + initctl) | 0x20000000);
4733 udelay(100L);
4734 cy_writel(addr + initctl, cy_readl(addr + initctl) & ~0x20000000);
4735 }
4736
4737 /*
4738 * ---------------------------------------------------------------------
4739 * cy_detect_pci() - Test PCI bus presence and Cyclom-Ye/PCI.
4740 * sets global variables and return the number of PCI boards found.
4741 * ---------------------------------------------------------------------
4742 */
4743 static int __init cy_detect_pci(void)
4744 {
4745 #ifdef CONFIG_PCI
4746
4747 struct pci_dev *pdev = NULL;
4748 unsigned char cyy_rev_id;
4749 unsigned char cy_pci_irq = 0;
4750 uclong cy_pci_phys0, cy_pci_phys2;
4751 void __iomem *cy_pci_addr0, *cy_pci_addr2;
4752 unsigned short i, j, cy_pci_nchan, plx_ver;
4753 unsigned short device_id, dev_index = 0;
4754 uclong mailbox;
4755 uclong ZeIndex = 0;
4756 void __iomem *Ze_addr0[NR_CARDS], *Ze_addr2[NR_CARDS];
4757 uclong Ze_phys0[NR_CARDS], Ze_phys2[NR_CARDS];
4758 unsigned char Ze_irq[NR_CARDS];
4759 struct pci_dev *Ze_pdev[NR_CARDS];
4760
4761 for (i = 0; i < NR_CARDS; i++) {
4762 /* look for a Cyclades card by vendor and device id */
4763 while ((device_id = cy_pci_dev_id[dev_index].device) != 0) {
4764 if ((pdev = pci_get_device(PCI_VENDOR_ID_CYCLADES,
4765 device_id, pdev)) == NULL) {
4766 dev_index++; /* try next device id */
4767 } else {
4768 break; /* found a board */
4769 }
4770 }
4771
4772 if (device_id == 0)
4773 break;
4774
4775 if (pci_enable_device(pdev))
4776 continue;
4777
4778 /* read PCI configuration area */
4779 cy_pci_irq = pdev->irq;
4780 cy_pci_phys0 = pci_resource_start(pdev, 0);
4781 cy_pci_phys2 = pci_resource_start(pdev, 2);
4782 pci_read_config_byte(pdev, PCI_REVISION_ID, &cyy_rev_id);
4783
4784 device_id &= ~PCI_DEVICE_ID_MASK;
4785
4786 if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo ||
4787 device_id == PCI_DEVICE_ID_CYCLOM_Y_Hi) {
4788 #ifdef CY_PCI_DEBUG
4789 printk("Cyclom-Y/PCI (bus=0x0%x, pci_id=0x%x, ",
4790 pdev->bus->number, pdev->devfn);
4791 printk("rev_id=%d) IRQ%d\n",
4792 cyy_rev_id, (int)cy_pci_irq);
4793 printk("Cyclom-Y/PCI:found winaddr=0x%lx "
4794 "ctladdr=0x%lx\n",
4795 (ulong)cy_pci_phys2, (ulong)cy_pci_phys0);
4796 #endif
4797
4798 if (pci_resource_flags(pdev, 2) & IORESOURCE_IO) {
4799 printk(" Warning: PCI I/O bit incorrectly "
4800 "set. Ignoring it...\n");
4801 pdev->resource[2].flags &= ~IORESOURCE_IO;
4802 }
4803
4804 /* Although we don't use this I/O region, we should
4805 request it from the kernel anyway, to avoid problems
4806 with other drivers accessing it. */
4807 if (pci_request_regions(pdev, "Cyclom-Y") != 0) {
4808 printk(KERN_ERR "cyclades: failed to reserve "
4809 "PCI resources\n");
4810 continue;
4811 }
4812 #if defined(__alpha__)
4813 if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo) { /* below 1M? */
4814 printk("Cyclom-Y/PCI (bus=0x0%x, pci_id=0x%x, ",
4815 pdev->bus->number, pdev->devfn);
4816 printk("rev_id=%d) IRQ%d\n",
4817 cyy_rev_id, (int)cy_pci_irq);
4818 printk("Cyclom-Y/PCI:found winaddr=0x%lx "
4819 "ctladdr=0x%lx\n",
4820 (ulong)cy_pci_phys2,
4821 (ulong)cy_pci_phys0);
4822 printk("Cyclom-Y/PCI not supported for low "
4823 "addresses in Alpha systems.\n");
4824 i--;
4825 continue;
4826 }
4827 #endif
4828 cy_pci_addr0 = ioremap(cy_pci_phys0, CyPCI_Yctl);
4829 cy_pci_addr2 = ioremap(cy_pci_phys2, CyPCI_Ywin);
4830
4831 #ifdef CY_PCI_DEBUG
4832 printk("Cyclom-Y/PCI: relocate winaddr=0x%lx "
4833 "ctladdr=0x%lx\n",
4834 (u_long)cy_pci_addr2, (u_long)cy_pci_addr0);
4835 #endif
4836 cy_pci_nchan = (unsigned short)(CyPORTS_PER_CHIP *
4837 cyy_init_card(cy_pci_addr2, 1));
4838 if (cy_pci_nchan == 0) {
4839 printk("Cyclom-Y PCI host card with ");
4840 printk("no Serial-Modules at 0x%lx.\n",
4841 (ulong) cy_pci_phys2);
4842 i--;
4843 continue;
4844 }
4845 if ((cy_next_channel + cy_pci_nchan) > NR_PORTS) {
4846 printk("Cyclom-Y/PCI found at 0x%lx ",
4847 (ulong) cy_pci_phys2);
4848 printk("but no channels are available.\n");
4849 printk("Change NR_PORTS in cyclades.c and "
4850 "recompile kernel.\n");
4851 return i;
4852 }
4853 /* fill the next cy_card structure available */
4854 for (j = 0; j < NR_CARDS; j++) {
4855 if (cy_card[j].base_addr == 0)
4856 break;
4857 }
4858 if (j == NR_CARDS) { /* no more cy_cards available */
4859 printk("Cyclom-Y/PCI found at 0x%lx ",
4860 (ulong) cy_pci_phys2);
4861 printk("but no more cards can be used.\n");
4862 printk("Change NR_CARDS in cyclades.c and "
4863 "recompile kernel.\n");
4864 return i;
4865 }
4866
4867 /* allocate IRQ */
4868 if (request_irq(cy_pci_irq, cyy_interrupt,
4869 IRQF_SHARED, "Cyclom-Y", &cy_card[j])) {
4870 printk("Cyclom-Y/PCI found at 0x%lx ",
4871 (ulong) cy_pci_phys2);
4872 printk("but could not allocate IRQ%d.\n",
4873 cy_pci_irq);
4874 return i;
4875 }
4876
4877 /* set cy_card */
4878 cy_card[j].base_phys = (ulong) cy_pci_phys2;
4879 cy_card[j].ctl_phys = (ulong) cy_pci_phys0;
4880 cy_card[j].base_addr = cy_pci_addr2;
4881 cy_card[j].ctl_addr = cy_pci_addr0;
4882 cy_card[j].irq = (int)cy_pci_irq;
4883 cy_card[j].bus_index = 1;
4884 cy_card[j].first_line = cy_next_channel;
4885 cy_card[j].num_chips = cy_pci_nchan / 4;
4886 cy_card[j].pdev = pdev;
4887
4888 /* enable interrupts in the PCI interface */
4889 plx_ver = cy_readb(cy_pci_addr2 + CyPLX_VER) & 0x0f;
4890 switch (plx_ver) {
4891 case PLX_9050:
4892
4893 cy_writeb(cy_pci_addr0 + 0x4c, 0x43);
4894 break;
4895
4896 case PLX_9060:
4897 case PLX_9080:
4898 default: /* Old boards, use PLX_9060 */
4899
4900 plx_init(cy_pci_addr0, 0x6c);
4901 /* For some yet unknown reason, once the PLX9060 reloads
4902 the EEPROM, the IRQ is lost and, thus, we have to
4903 re-write it to the PCI config. registers.
4904 This will remain here until we find a permanent
4905 fix. */
4906 pci_write_config_byte(pdev, PCI_INTERRUPT_LINE,
4907 cy_pci_irq);
4908
4909 cy_writew(cy_pci_addr0 + 0x68,
4910 cy_readw(cy_pci_addr0 +
4911 0x68) | 0x0900);
4912 break;
4913 }
4914
4915 /* print message */
4916 printk("Cyclom-Y/PCI #%d: 0x%lx-0x%lx, IRQ%d, ",
4917 j + 1, (ulong)cy_pci_phys2,
4918 (ulong) (cy_pci_phys2 + CyPCI_Ywin - 1),
4919 (int)cy_pci_irq);
4920 printk("%d channels starting from port %d.\n",
4921 cy_pci_nchan, cy_next_channel);
4922
4923 cy_next_channel += cy_pci_nchan;
4924 } else if (device_id == PCI_DEVICE_ID_CYCLOM_Z_Lo) {
4925 /* print message */
4926 printk("Cyclades-Z/PCI (bus=0x0%x, pci_id=0x%x, ",
4927 pdev->bus->number, pdev->devfn);
4928 printk("rev_id=%d) IRQ%d\n",
4929 cyy_rev_id, (int)cy_pci_irq);
4930 printk("Cyclades-Z/PCI: found winaddr=0x%lx "
4931 "ctladdr=0x%lx\n",
4932 (ulong)cy_pci_phys2, (ulong)cy_pci_phys0);
4933 printk("Cyclades-Z/PCI not supported for low "
4934 "addresses\n");
4935 break;
4936 } else if (device_id == PCI_DEVICE_ID_CYCLOM_Z_Hi) {
4937 #ifdef CY_PCI_DEBUG
4938 printk("Cyclades-Z/PCI (bus=0x0%x, pci_id=0x%x, ",
4939 pdev->bus->number, pdev->devfn);
4940 printk("rev_id=%d) IRQ%d\n",
4941 cyy_rev_id, (int)cy_pci_irq);
4942 printk("Cyclades-Z/PCI: found winaddr=0x%lx "
4943 "ctladdr=0x%lx\n",
4944 (ulong) cy_pci_phys2, (ulong) cy_pci_phys0);
4945 #endif
4946 cy_pci_addr0 = ioremap(cy_pci_phys0, CyPCI_Zctl);
4947
4948 /* Disable interrupts on the PLX before resetting it */
4949 cy_writew(cy_pci_addr0 + 0x68,
4950 cy_readw(cy_pci_addr0 + 0x68) & ~0x0900);
4951
4952 plx_init(cy_pci_addr0, 0x6c);
4953 /* For some yet unknown reason, once the PLX9060 reloads
4954 the EEPROM, the IRQ is lost and, thus, we have to
4955 re-write it to the PCI config. registers.
4956 This will remain here until we find a permanent
4957 fix. */
4958 pci_write_config_byte(pdev, PCI_INTERRUPT_LINE,
4959 cy_pci_irq);
4960
4961 mailbox =
4962 (uclong)cy_readl(&((struct RUNTIME_9060 __iomem *)
4963 cy_pci_addr0)->mail_box_0);
4964
4965 if (pci_resource_flags(pdev, 2) & IORESOURCE_IO) {
4966 printk(" Warning: PCI I/O bit incorrectly "
4967 "set. Ignoring it...\n");
4968 pdev->resource[2].flags &= ~IORESOURCE_IO;
4969 }
4970
4971 /* Although we don't use this I/O region, we should
4972 request it from the kernel anyway, to avoid problems
4973 with other drivers accessing it. */
4974 if (pci_request_regions(pdev, "Cyclades-Z") != 0) {
4975 printk(KERN_ERR "cyclades: failed to reserve "
4976 "PCI resources\n");
4977 continue;
4978 }
4979
4980 if (mailbox == ZE_V1) {
4981 cy_pci_addr2 = ioremap(cy_pci_phys2,
4982 CyPCI_Ze_win);
4983 if (ZeIndex == NR_CARDS) {
4984 printk("Cyclades-Ze/PCI found at "
4985 "0x%lx but no more cards can "
4986 "be used.\nChange NR_CARDS in "
4987 "cyclades.c and recompile "
4988 "kernel.\n",
4989 (ulong)cy_pci_phys2);
4990 } else {
4991 Ze_phys0[ZeIndex] = cy_pci_phys0;
4992 Ze_phys2[ZeIndex] = cy_pci_phys2;
4993 Ze_addr0[ZeIndex] = cy_pci_addr0;
4994 Ze_addr2[ZeIndex] = cy_pci_addr2;
4995 Ze_irq[ZeIndex] = cy_pci_irq;
4996 Ze_pdev[ZeIndex] = pdev;
4997 ZeIndex++;
4998 }
4999 i--;
5000 continue;
5001 } else {
5002 cy_pci_addr2 = ioremap(cy_pci_phys2,CyPCI_Zwin);
5003 }
5004
5005 #ifdef CY_PCI_DEBUG
5006 printk("Cyclades-Z/PCI: relocate winaddr=0x%lx "
5007 "ctladdr=0x%lx\n",
5008 (ulong) cy_pci_addr2, (ulong) cy_pci_addr0);
5009 if (mailbox == ZO_V1) {
5010 cy_writel(&((struct RUNTIME_9060 *)
5011 (cy_pci_addr0))->loc_addr_base,
5012 WIN_CREG);
5013 PAUSE;
5014 printk("Cyclades-8Zo/PCI: FPGA id %lx, ver "
5015 "%lx\n", (ulong) (0xff &
5016 cy_readl(&((struct CUSTOM_REG *)
5017 (cy_pci_addr2))->fpga_id)),
5018 (ulong)(0xff &
5019 cy_readl(&((struct CUSTOM_REG *)
5020 (cy_pci_addr2))->
5021 fpga_version)));
5022 cy_writel(&((struct RUNTIME_9060 *)
5023 (cy_pci_addr0))->loc_addr_base,
5024 WIN_RAM);
5025 } else {
5026 printk("Cyclades-Z/PCI: New Cyclades-Z board. "
5027 "FPGA not loaded\n");
5028 }
5029 #endif
5030 /* The following clears the firmware id word. This
5031 ensures that the driver will not attempt to talk to
5032 the board until it has been properly initialized.
5033 */
5034 PAUSE;
5035 if ((mailbox == ZO_V1) || (mailbox == ZO_V2))
5036 cy_writel(cy_pci_addr2 + ID_ADDRESS, 0L);
5037
5038 /* This must be a Cyclades-8Zo/PCI. The extendable
5039 version will have a different device_id and will
5040 be allocated its maximum number of ports. */
5041 cy_pci_nchan = 8;
5042
5043 if ((cy_next_channel + cy_pci_nchan) > NR_PORTS) {
5044 printk("Cyclades-8Zo/PCI found at 0x%lx but"
5045 "no channels are available.\nChange "
5046 "NR_PORTS in cyclades.c and recompile "
5047 "kernel.\n", (ulong)cy_pci_phys2);
5048 return i;
5049 }
5050
5051 /* fill the next cy_card structure available */
5052 for (j = 0; j < NR_CARDS; j++) {
5053 if (cy_card[j].base_addr == 0)
5054 break;
5055 }
5056 if (j == NR_CARDS) { /* no more cy_cards available */
5057 printk("Cyclades-8Zo/PCI found at 0x%lx but"
5058 "no more cards can be used.\nChange "
5059 "NR_CARDS in cyclades.c and recompile "
5060 "kernel.\n", (ulong)cy_pci_phys2);
5061 return i;
5062 }
5063 #ifdef CONFIG_CYZ_INTR
5064 /* allocate IRQ only if board has an IRQ */
5065 if ((cy_pci_irq != 0) && (cy_pci_irq != 255)) {
5066 if (request_irq(cy_pci_irq, cyz_interrupt,
5067 IRQF_SHARED, "Cyclades-Z",
5068 &cy_card[j])) {
5069 printk("Cyclom-8Zo/PCI found at 0x%lx "
5070 "but could not allocate "
5071 "IRQ%d.\n", (ulong)cy_pci_phys2,
5072 cy_pci_irq);
5073 return i;
5074 }
5075 }
5076 #endif /* CONFIG_CYZ_INTR */
5077
5078 /* set cy_card */
5079 cy_card[j].base_phys = cy_pci_phys2;
5080 cy_card[j].ctl_phys = cy_pci_phys0;
5081 cy_card[j].base_addr = cy_pci_addr2;
5082 cy_card[j].ctl_addr = cy_pci_addr0;
5083 cy_card[j].irq = (int)cy_pci_irq;
5084 cy_card[j].bus_index = 1;
5085 cy_card[j].first_line = cy_next_channel;
5086 cy_card[j].num_chips = -1;
5087 cy_card[j].pdev = pdev;
5088
5089 /* print message */
5090 #ifdef CONFIG_CYZ_INTR
5091 /* don't report IRQ if board is no IRQ */
5092 if ((cy_pci_irq != 0) && (cy_pci_irq != 255))
5093 printk("Cyclades-8Zo/PCI #%d: 0x%lx-0x%lx, "
5094 "IRQ%d, ", j + 1, (ulong)cy_pci_phys2,
5095 (ulong) (cy_pci_phys2 + CyPCI_Zwin - 1),
5096 (int)cy_pci_irq);
5097 else
5098 #endif /* CONFIG_CYZ_INTR */
5099 printk("Cyclades-8Zo/PCI #%d: 0x%lx-0x%lx, ",
5100 j + 1, (ulong)cy_pci_phys2,
5101 (ulong)(cy_pci_phys2 + CyPCI_Zwin - 1));
5102
5103 printk("%d channels starting from port %d.\n",
5104 cy_pci_nchan, cy_next_channel);
5105 cy_next_channel += cy_pci_nchan;
5106 }
5107 }
5108
5109 for (; ZeIndex != 0 && i < NR_CARDS; i++) {
5110 cy_pci_phys0 = Ze_phys0[0];
5111 cy_pci_phys2 = Ze_phys2[0];
5112 cy_pci_addr0 = Ze_addr0[0];
5113 cy_pci_addr2 = Ze_addr2[0];
5114 cy_pci_irq = Ze_irq[0];
5115 pdev = Ze_pdev[0];
5116 for (j = 0; j < ZeIndex - 1; j++) {
5117 Ze_phys0[j] = Ze_phys0[j + 1];
5118 Ze_phys2[j] = Ze_phys2[j + 1];
5119 Ze_addr0[j] = Ze_addr0[j + 1];
5120 Ze_addr2[j] = Ze_addr2[j + 1];
5121 Ze_irq[j] = Ze_irq[j + 1];
5122 Ze_pdev[j] = Ze_pdev[j + 1];
5123 }
5124 ZeIndex--;
5125 mailbox = (uclong)cy_readl(&((struct RUNTIME_9060 __iomem *)
5126 cy_pci_addr0)->mail_box_0);
5127 #ifdef CY_PCI_DEBUG
5128 printk("Cyclades-Z/PCI: relocate winaddr=0x%lx ctladdr=0x%lx\n",
5129 (ulong)cy_pci_addr2, (ulong)cy_pci_addr0);
5130 printk("Cyclades-Z/PCI: New Cyclades-Z board. FPGA not "
5131 "loaded\n");
5132 #endif
5133 PAUSE;
5134 /* This must be the new Cyclades-Ze/PCI. */
5135 cy_pci_nchan = ZE_V1_NPORTS;
5136
5137 if ((cy_next_channel + cy_pci_nchan) > NR_PORTS) {
5138 printk("Cyclades-Ze/PCI found at 0x%lx but no channels "
5139 "are available.\nChange NR_PORTS in cyclades.c "
5140 "and recompile kernel.\n",
5141 (ulong) cy_pci_phys2);
5142 return i;
5143 }
5144
5145 /* fill the next cy_card structure available */
5146 for (j = 0; j < NR_CARDS; j++) {
5147 if (cy_card[j].base_addr == 0)
5148 break;
5149 }
5150 if (j == NR_CARDS) { /* no more cy_cards available */
5151 printk("Cyclades-Ze/PCI found at 0x%lx but no more "
5152 "cards can be used.\nChange NR_CARDS in "
5153 "cyclades.c and recompile kernel.\n",
5154 (ulong) cy_pci_phys2);
5155 return i;
5156 }
5157 #ifdef CONFIG_CYZ_INTR
5158 /* allocate IRQ only if board has an IRQ */
5159 if ((cy_pci_irq != 0) && (cy_pci_irq != 255)) {
5160 if (request_irq(cy_pci_irq, cyz_interrupt,
5161 IRQF_SHARED, "Cyclades-Z",
5162 &cy_card[j])) {
5163 printk("Cyclom-Ze/PCI found at 0x%lx ",
5164 (ulong) cy_pci_phys2);
5165 printk("but could not allocate IRQ%d.\n",
5166 cy_pci_irq);
5167 return i;
5168 }
5169 }
5170 #endif /* CONFIG_CYZ_INTR */
5171
5172 /* set cy_card */
5173 cy_card[j].base_phys = cy_pci_phys2;
5174 cy_card[j].ctl_phys = cy_pci_phys0;
5175 cy_card[j].base_addr = cy_pci_addr2;
5176 cy_card[j].ctl_addr = cy_pci_addr0;
5177 cy_card[j].irq = (int)cy_pci_irq;
5178 cy_card[j].bus_index = 1;
5179 cy_card[j].first_line = cy_next_channel;
5180 cy_card[j].num_chips = -1;
5181 cy_card[j].pdev = pdev;
5182
5183 /* print message */
5184 #ifdef CONFIG_CYZ_INTR
5185 /* don't report IRQ if board is no IRQ */
5186 if ((cy_pci_irq != 0) && (cy_pci_irq != 255))
5187 printk("Cyclades-Ze/PCI #%d: 0x%lx-0x%lx, IRQ%d, ",
5188 j + 1, (ulong) cy_pci_phys2,
5189 (ulong) (cy_pci_phys2 + CyPCI_Ze_win - 1),
5190 (int)cy_pci_irq);
5191 else
5192 #endif /* CONFIG_CYZ_INTR */
5193 printk("Cyclades-Ze/PCI #%d: 0x%lx-0x%lx, ",
5194 j + 1, (ulong) cy_pci_phys2,
5195 (ulong) (cy_pci_phys2 + CyPCI_Ze_win - 1));
5196
5197 printk("%d channels starting from port %d.\n",
5198 cy_pci_nchan, cy_next_channel);
5199 cy_next_channel += cy_pci_nchan;
5200 }
5201 if (ZeIndex != 0) {
5202 printk("Cyclades-Ze/PCI found at 0x%x but no more cards can be "
5203 "used.\nChange NR_CARDS in cyclades.c and recompile "
5204 "kernel.\n", (unsigned int)Ze_phys2[0]);
5205 }
5206 return i;
5207 #else
5208 return 0;
5209 #endif /* ifdef CONFIG_PCI */
5210 } /* cy_detect_pci */
5211
5212 /*
5213 * This routine prints out the appropriate serial driver version number
5214 * and identifies which options were configured into this driver.
5215 */
5216 static inline void show_version(void)
5217 {
5218 printk("Cyclades driver " CY_VERSION "\n");
5219 printk(" built %s %s\n", __DATE__, __TIME__);
5220 } /* show_version */
5221
5222 static int
5223 cyclades_get_proc_info(char *buf, char **start, off_t offset, int length,
5224 int *eof, void *data)
5225 {
5226 struct cyclades_port *info;
5227 int i;
5228 int len = 0;
5229 off_t begin = 0;
5230 off_t pos = 0;
5231 int size;
5232 __u32 cur_jifs = jiffies;
5233
5234 size = sprintf(buf, "Dev TimeOpen BytesOut IdleOut BytesIn "
5235 "IdleIn Overruns Ldisc\n");
5236
5237 pos += size;
5238 len += size;
5239
5240 /* Output one line for each known port */
5241 for (i = 0; i < NR_PORTS && cy_port[i].line >= 0; i++) {
5242 info = &cy_port[i];
5243
5244 if (info->count)
5245 size = sprintf(buf + len, "%3d %8lu %10lu %8lu %10lu "
5246 "%8lu %9lu %6ld\n", info->line,
5247 (cur_jifs - info->idle_stats.in_use) / HZ,
5248 info->idle_stats.xmit_bytes,
5249 (cur_jifs - info->idle_stats.xmit_idle) / HZ,
5250 info->idle_stats.recv_bytes,
5251 (cur_jifs - info->idle_stats.recv_idle) / HZ,
5252 info->idle_stats.overruns,
5253 (long)info->tty->ldisc.num);
5254 else
5255 size = sprintf(buf + len, "%3d %8lu %10lu %8lu %10lu "
5256 "%8lu %9lu %6ld\n",
5257 info->line, 0L, 0L, 0L, 0L, 0L, 0L, 0L);
5258 len += size;
5259 pos = begin + len;
5260
5261 if (pos < offset) {
5262 len = 0;
5263 begin = pos;
5264 }
5265 if (pos > offset + length)
5266 goto done;
5267 }
5268 *eof = 1;
5269 done:
5270 *start = buf + (offset - begin); /* Start of wanted data */
5271 len -= (offset - begin); /* Start slop */
5272 if (len > length)
5273 len = length; /* Ending slop */
5274 if (len < 0)
5275 len = 0;
5276 return len;
5277 }
5278
5279 /* The serial driver boot-time initialization code!
5280 Hardware I/O ports are mapped to character special devices on a
5281 first found, first allocated manner. That is, this code searches
5282 for Cyclom cards in the system. As each is found, it is probed
5283 to discover how many chips (and thus how many ports) are present.
5284 These ports are mapped to the tty ports 32 and upward in monotonic
5285 fashion. If an 8-port card is replaced with a 16-port card, the
5286 port mapping on a following card will shift.
5287
5288 This approach is different from what is used in the other serial
5289 device driver because the Cyclom is more properly a multiplexer,
5290 not just an aggregation of serial ports on one card.
5291
5292 If there are more cards with more ports than have been
5293 statically allocated above, a warning is printed and the
5294 extra ports are ignored.
5295 */
5296
5297 static const struct tty_operations cy_ops = {
5298 .open = cy_open,
5299 .close = cy_close,
5300 .write = cy_write,
5301 .put_char = cy_put_char,
5302 .flush_chars = cy_flush_chars,
5303 .write_room = cy_write_room,
5304 .chars_in_buffer = cy_chars_in_buffer,
5305 .flush_buffer = cy_flush_buffer,
5306 .ioctl = cy_ioctl,
5307 .throttle = cy_throttle,
5308 .unthrottle = cy_unthrottle,
5309 .set_termios = cy_set_termios,
5310 .stop = cy_stop,
5311 .start = cy_start,
5312 .hangup = cy_hangup,
5313 .break_ctl = cy_break,
5314 .wait_until_sent = cy_wait_until_sent,
5315 .read_proc = cyclades_get_proc_info,
5316 .tiocmget = cy_tiocmget,
5317 .tiocmset = cy_tiocmset,
5318 };
5319
5320 static int __init cy_init(void)
5321 {
5322 struct cyclades_port *info;
5323 struct cyclades_card *cinfo;
5324 int number_z_boards = 0;
5325 int board, port, i, index;
5326 unsigned long mailbox;
5327 unsigned short chip_number;
5328 int nports;
5329
5330 cy_serial_driver = alloc_tty_driver(NR_PORTS);
5331 if (!cy_serial_driver)
5332 return -ENOMEM;
5333 show_version();
5334
5335 /* Initialize the tty_driver structure */
5336
5337 cy_serial_driver->owner = THIS_MODULE;
5338 cy_serial_driver->driver_name = "cyclades";
5339 cy_serial_driver->name = "ttyC";
5340 cy_serial_driver->major = CYCLADES_MAJOR;
5341 cy_serial_driver->minor_start = 0;
5342 cy_serial_driver->type = TTY_DRIVER_TYPE_SERIAL;
5343 cy_serial_driver->subtype = SERIAL_TYPE_NORMAL;
5344 cy_serial_driver->init_termios = tty_std_termios;
5345 cy_serial_driver->init_termios.c_cflag =
5346 B9600 | CS8 | CREAD | HUPCL | CLOCAL;
5347 cy_serial_driver->flags = TTY_DRIVER_REAL_RAW;
5348 tty_set_operations(cy_serial_driver, &cy_ops);
5349
5350 if (tty_register_driver(cy_serial_driver))
5351 panic("Couldn't register Cyclades serial driver\n");
5352
5353 for (i = 0; i < NR_CARDS; i++) {
5354 /* base_addr=0 indicates board not found */
5355 cy_card[i].base_addr = NULL;
5356 }
5357
5358 /* the code below is responsible to find the boards. Each different
5359 type of board has its own detection routine. If a board is found,
5360 the next cy_card structure available is set by the detection
5361 routine. These functions are responsible for checking the
5362 availability of cy_card and cy_port data structures and updating
5363 the cy_next_channel. */
5364
5365 /* look for isa boards */
5366 cy_isa_nboard = cy_detect_isa();
5367
5368 /* look for pci boards */
5369 cy_pci_nboard = cy_detect_pci();
5370
5371 cy_nboard = cy_isa_nboard + cy_pci_nboard;
5372
5373 /* invalidate remaining cy_card structures */
5374 for (i = 0; i < NR_CARDS; i++) {
5375 if (cy_card[i].base_addr == 0) {
5376 cy_card[i].first_line = -1;
5377 cy_card[i].ctl_addr = NULL;
5378 cy_card[i].irq = 0;
5379 cy_card[i].bus_index = 0;
5380 cy_card[i].first_line = 0;
5381 cy_card[i].num_chips = 0;
5382 }
5383 }
5384 /* invalidate remaining cy_port structures */
5385 for (i = cy_next_channel; i < NR_PORTS; i++) {
5386 cy_port[i].line = -1;
5387 cy_port[i].magic = -1;
5388 }
5389
5390 /* initialize per-port data structures for each valid board found */
5391 for (board = 0; board < cy_nboard; board++) {
5392 cinfo = &cy_card[board];
5393 if (cinfo->num_chips == -1) { /* Cyclades-Z */
5394 number_z_boards++;
5395 mailbox = cy_readl(&((struct RUNTIME_9060 __iomem *)
5396 cy_card[board].ctl_addr)->
5397 mail_box_0);
5398 nports = (mailbox == ZE_V1) ? ZE_V1_NPORTS : 8;
5399 cinfo->intr_enabled = 0;
5400 cinfo->nports = 0; /* Will be correctly set later, after
5401 Z FW is loaded */
5402 spin_lock_init(&cinfo->card_lock);
5403 for (port = cinfo->first_line;
5404 port < cinfo->first_line + nports; port++) {
5405 info = &cy_port[port];
5406 info->magic = CYCLADES_MAGIC;
5407 info->type = PORT_STARTECH;
5408 info->card = board;
5409 info->line = port;
5410 info->chip_rev = 0;
5411 info->flags = STD_COM_FLAGS;
5412 info->tty = NULL;
5413 if (mailbox == ZO_V1)
5414 info->xmit_fifo_size = CYZ_FIFO_SIZE;
5415 else
5416 info->xmit_fifo_size =
5417 4 * CYZ_FIFO_SIZE;
5418 info->cor1 = 0;
5419 info->cor2 = 0;
5420 info->cor3 = 0;
5421 info->cor4 = 0;
5422 info->cor5 = 0;
5423 info->tbpr = 0;
5424 info->tco = 0;
5425 info->rbpr = 0;
5426 info->rco = 0;
5427 info->custom_divisor = 0;
5428 info->close_delay = 5 * HZ / 10;
5429 info->closing_wait = CLOSING_WAIT_DELAY;
5430 info->icount.cts = info->icount.dsr =
5431 info->icount.rng = info->icount.dcd = 0;
5432 info->icount.rx = info->icount.tx = 0;
5433 info->icount.frame = info->icount.parity = 0;
5434 info->icount.overrun = info->icount.brk = 0;
5435 info->x_char = 0;
5436 info->event = 0;
5437 info->count = 0;
5438 info->blocked_open = 0;
5439 info->default_threshold = 0;
5440 info->default_timeout = 0;
5441 INIT_WORK(&info->tqueue, do_softint);
5442 init_waitqueue_head(&info->open_wait);
5443 init_waitqueue_head(&info->close_wait);
5444 init_waitqueue_head(&info->shutdown_wait);
5445 init_waitqueue_head(&info->delta_msr_wait);
5446 /* info->session */
5447 /* info->pgrp */
5448 info->read_status_mask = 0;
5449 /* info->timeout */
5450 /* Bentson's vars */
5451 info->jiffies[0] = 0;
5452 info->jiffies[1] = 0;
5453 info->jiffies[2] = 0;
5454 info->rflush_count = 0;
5455 #ifdef CONFIG_CYZ_INTR
5456 init_timer(&cyz_rx_full_timer[port]);
5457 cyz_rx_full_timer[port].function = NULL;
5458 #endif
5459 }
5460 continue;
5461 } else { /* Cyclom-Y of some kind */
5462 index = cinfo->bus_index;
5463 spin_lock_init(&cinfo->card_lock);
5464 cinfo->nports = CyPORTS_PER_CHIP * cinfo->num_chips;
5465 for (port = cinfo->first_line;
5466 port < cinfo->first_line + cinfo->nports; port++) {
5467 info = &cy_port[port];
5468 info->magic = CYCLADES_MAGIC;
5469 info->type = PORT_CIRRUS;
5470 info->card = board;
5471 info->line = port;
5472 info->flags = STD_COM_FLAGS;
5473 info->tty = NULL;
5474 info->xmit_fifo_size = CyMAX_CHAR_FIFO;
5475 info->cor1 =
5476 CyPARITY_NONE | Cy_1_STOP | Cy_8_BITS;
5477 info->cor2 = CyETC;
5478 info->cor3 = 0x08; /* _very_ small rcv threshold */
5479 info->cor4 = 0;
5480 info->cor5 = 0;
5481 info->custom_divisor = 0;
5482 info->close_delay = 5 * HZ / 10;
5483 info->closing_wait = CLOSING_WAIT_DELAY;
5484 info->icount.cts = info->icount.dsr =
5485 info->icount.rng = info->icount.dcd = 0;
5486 info->icount.rx = info->icount.tx = 0;
5487 info->icount.frame = info->icount.parity = 0;
5488 info->icount.overrun = info->icount.brk = 0;
5489 chip_number = (port - cinfo->first_line) / 4;
5490 if ((info->chip_rev =
5491 cy_readb(cinfo->base_addr +
5492 (cy_chip_offset[chip_number] <<
5493 index) + (CyGFRCR << index))) >=
5494 CD1400_REV_J) {
5495 /* It is a CD1400 rev. J or later */
5496 info->tbpr = baud_bpr_60[13]; /* Tx BPR */
5497 info->tco = baud_co_60[13]; /* Tx CO */
5498 info->rbpr = baud_bpr_60[13]; /* Rx BPR */
5499 info->rco = baud_co_60[13]; /* Rx CO */
5500 info->rflow = 0;
5501 info->rtsdtr_inv = 1;
5502 } else {
5503 info->tbpr = baud_bpr_25[13]; /* Tx BPR */
5504 info->tco = baud_co_25[13]; /* Tx CO */
5505 info->rbpr = baud_bpr_25[13]; /* Rx BPR */
5506 info->rco = baud_co_25[13]; /* Rx CO */
5507 info->rflow = 0;
5508 info->rtsdtr_inv = 0;
5509 }
5510 info->x_char = 0;
5511 info->event = 0;
5512 info->count = 0;
5513 info->blocked_open = 0;
5514 info->default_threshold = 0;
5515 info->default_timeout = 0;
5516 INIT_WORK(&info->tqueue, do_softint);
5517 init_waitqueue_head(&info->open_wait);
5518 init_waitqueue_head(&info->close_wait);
5519 init_waitqueue_head(&info->shutdown_wait);
5520 init_waitqueue_head(&info->delta_msr_wait);
5521 /* info->session */
5522 /* info->pgrp */
5523 info->read_status_mask =
5524 CyTIMEOUT | CySPECHAR | CyBREAK
5525 | CyPARITY | CyFRAME | CyOVERRUN;
5526 /* info->timeout */
5527 }
5528 }
5529 }
5530
5531 #ifndef CONFIG_CYZ_INTR
5532 if (number_z_boards && !cyz_timeron) {
5533 cyz_timeron++;
5534 cyz_timerlist.expires = jiffies + 1;
5535 add_timer(&cyz_timerlist);
5536 #ifdef CY_PCI_DEBUG
5537 printk("Cyclades-Z polling initialized\n");
5538 #endif
5539 }
5540 #endif /* CONFIG_CYZ_INTR */
5541
5542 return 0;
5543
5544 } /* cy_init */
5545
5546 static void __exit cy_cleanup_module(void)
5547 {
5548 int i, e1;
5549
5550 #ifndef CONFIG_CYZ_INTR
5551 if (cyz_timeron){
5552 cyz_timeron = 0;
5553 del_timer(&cyz_timerlist);
5554 }
5555 #endif /* CONFIG_CYZ_INTR */
5556
5557 if ((e1 = tty_unregister_driver(cy_serial_driver)))
5558 printk("cyc: failed to unregister Cyclades serial driver(%d)\n",
5559 e1);
5560
5561 put_tty_driver(cy_serial_driver);
5562
5563 for (i = 0; i < NR_CARDS; i++) {
5564 if (cy_card[i].base_addr) {
5565 iounmap(cy_card[i].base_addr);
5566 if (cy_card[i].ctl_addr)
5567 iounmap(cy_card[i].ctl_addr);
5568 if (cy_card[i].irq
5569 #ifndef CONFIG_CYZ_INTR
5570 && cy_card[i].num_chips != -1 /* not a Z card */
5571 #endif /* CONFIG_CYZ_INTR */
5572 )
5573 free_irq(cy_card[i].irq, &cy_card[i]);
5574 #ifdef CONFIG_PCI
5575 if (cy_card[i].pdev)
5576 pci_release_regions(cy_card[i].pdev);
5577 #endif
5578 }
5579 }
5580 } /* cy_cleanup_module */
5581
5582 module_init(cy_init);
5583 module_exit(cy_cleanup_module);
5584
5585 MODULE_LICENSE("GPL");
Linux kernel - Deliverables
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