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[NET_SCHED]: Fix endless loops caused by inaccurate qlen counters (part 1)
[hh.org.git] / drivers / char / cyclades.c
blobe608dadece2fa0fa75878213c4012b99b1e1c28d
1 #undef BLOCKMOVE
2 #define Z_WAKE
3 #undef Z_EXT_CHARS_IN_BUFFER
4 static char rcsid[] =
5 "$Revision: 2.3.2.20 $$Date: 2004/02/25 18:14:16 $";
6
7 /*
8 * linux/drivers/char/cyclades.c
9 *
10 * This file contains the driver for the Cyclades async multiport
11 * serial boards.
12 *
13 * Initially written by Randolph Bentson <bentson@grieg.seaslug.org>.
14 * Modified and maintained by Marcio Saito <marcio@cyclades.com>.
15 * Currently maintained by Cyclades team <async@cyclades.com>.
16 *
17 * For Technical support and installation problems, please send e-mail
18 * to support@cyclades.com.
19 *
20 * Much of the design and some of the code came from serial.c
21 * which was copyright (C) 1991, 1992 Linus Torvalds. It was
22 * extensively rewritten by Theodore Ts'o, 8/16/92 -- 9/14/92,
23 * and then fixed as suggested by Michael K. Johnson 12/12/92.
24 *
25 * This version supports shared IRQ's (only for PCI boards).
26 *
27 * $Log: cyclades.c,v $
28 * Prevent users from opening non-existing Z ports.
29 *
30 * Revision 2.3.2.8 2000/07/06 18:14:16 ivan
31 * Fixed the PCI detection function to work properly on Alpha systems.
32 * Implemented support for TIOCSERGETLSR ioctl.
33 * Implemented full support for non-standard baud rates.
34 *
35 * Revision 2.3.2.7 2000/06/01 18:26:34 ivan
36 * Request PLX I/O region, although driver doesn't use it, to avoid
37 * problems with other drivers accessing it.
38 * Removed count for on-board buffer characters in cy_chars_in_buffer
39 * (Cyclades-Z only).
40 *
41 * Revision 2.3.2.6 2000/05/05 13:56:05 ivan
42 * Driver now reports physical instead of virtual memory addresses.
43 * Masks were added to some Cyclades-Z read accesses.
44 * Implemented workaround for PLX9050 bug that would cause a system lockup
45 * in certain systems, depending on the MMIO addresses allocated to the
46 * board.
47 * Changed the Tx interrupt programming in the CD1400 chips to boost up
48 * performance (Cyclom-Y only).
49 * Code is now compliant with the new module interface (module_[init|exit]).
50 * Make use of the PCI helper functions to access PCI resources.
51 * Did some code "housekeeping".
52 *
53 * Revision 2.3.2.5 2000/01/19 14:35:33 ivan
54 * Fixed bug in cy_set_termios on CRTSCTS flag turnoff.
55 *
56 * Revision 2.3.2.4 2000/01/17 09:19:40 ivan
57 * Fixed SMP locking in Cyclom-Y interrupt handler.
58 *
59 * Revision 2.3.2.3 1999/12/28 12:11:39 ivan
60 * Added a new cyclades_card field called nports to allow the driver to
61 * know the exact number of ports found by the Z firmware after its load;
62 * RX buffer contention prevention logic on interrupt op mode revisited
63 * (Cyclades-Z only);
64 * Revisited printk's for Z debug;
65 * Driver now makes sure that the constant SERIAL_XMIT_SIZE is defined;
66 *
67 * Revision 2.3.2.2 1999/10/01 11:27:43 ivan
68 * Fixed bug in cyz_poll that would make all ports but port 0
69 * unable to transmit/receive data (Cyclades-Z only);
70 * Implemented logic to prevent the RX buffer from being stuck with data
71 * due to a driver / firmware race condition in interrupt op mode
72 * (Cyclades-Z only);
73 * Fixed bug in block_til_ready logic that would lead to a system crash;
74 * Revisited cy_close spinlock usage;
75 *
76 * Revision 2.3.2.1 1999/09/28 11:01:22 ivan
77 * Revisited CONFIG_PCI conditional compilation for PCI board support;
78 * Implemented TIOCGICOUNT and TIOCMIWAIT ioctl support;
79 * _Major_ cleanup on the Cyclades-Z interrupt support code / logic;
80 * Removed CTS handling from the driver -- this is now completely handled
81 * by the firmware (Cyclades-Z only);
82 * Flush RX on-board buffers on a port open (Cyclades-Z only);
83 * Fixed handling of ASYNC_SPD_* TTY flags;
84 * Module unload now unmaps all memory area allocated by ioremap;
85 *
86 * Revision 2.3.1.1 1999/07/15 16:45:53 ivan
87 * Removed CY_PROC conditional compilation;
88 * Implemented SMP-awareness for the driver;
89 * Implemented a new ISA IRQ autoprobe that uses the irq_probe_[on|off]
90 * functions;
91 * The driver now accepts memory addresses (maddr=0xMMMMM) and IRQs
92 * (irq=NN) as parameters (only for ISA boards);
93 * Fixed bug in set_line_char that would prevent the Cyclades-Z
94 * ports from being configured at speeds above 115.2Kbps;
95 * Fixed bug in cy_set_termios that would prevent XON/XOFF flow control
96 * switching from working properly;
97 * The driver now only prints IRQ info for the Cyclades-Z if it's
98 * configured to work in interrupt mode;
99 *
100 * Revision 2.2.2.3 1999/06/28 11:13:29 ivan
101 * Added support for interrupt mode operation for the Z cards;
102 * Removed the driver inactivity control for the Z;
103 * Added a missing MOD_DEC_USE_COUNT in the cy_open function for when
104 * the Z firmware is not loaded yet;
105 * Replaced the "manual" Z Tx flush buffer by a call to a FW command of
106 * same functionality;
107 * Implemented workaround for IRQ setting loss on the PCI configuration
108 * registers after a PCI bridge EEPROM reload (affects PLX9060 only);
109 *
110 * Revision 2.2.2.2 1999/05/14 17:18:15 ivan
111 * /proc entry location changed to /proc/tty/driver/cyclades;
112 * Added support to shared IRQ's (only for PCI boards);
113 * Added support for Cobalt Qube2 systems;
114 * IRQ [de]allocation scheme revisited;
115 * BREAK implementation changed in order to make use of the 'break_ctl'
116 * TTY facility;
117 * Fixed typo in TTY structure field 'driver_name';
118 * Included a PCI bridge reset and EEPROM reload in the board
119 * initialization code (for both Y and Z series).
120 *
121 * Revision 2.2.2.1 1999/04/08 16:17:43 ivan
122 * Fixed a bug in cy_wait_until_sent that was preventing the port to be
123 * closed properly after a SIGINT;
124 * Module usage counter scheme revisited;
125 * Added support to the upcoming Y PCI boards (i.e., support to additional
126 * PCI Device ID's).
127 *
128 * Revision 2.2.1.10 1999/01/20 16:14:29 ivan
129 * Removed all unnecessary page-alignement operations in ioremap calls
130 * (ioremap is currently safe for these operations).
131 *
132 * Revision 2.2.1.9 1998/12/30 18:18:30 ivan
133 * Changed access to PLX PCI bridge registers from I/O to MMIO, in
134 * order to make PLX9050-based boards work with certain motherboards.
135 *
136 * Revision 2.2.1.8 1998/11/13 12:46:20 ivan
137 * cy_close function now resets (correctly) the tty->closing flag;
138 * JIFFIES_DIFF macro fixed.
139 *
140 * Revision 2.2.1.7 1998/09/03 12:07:28 ivan
141 * Fixed bug in cy_close function, which was not informing HW of
142 * which port should have the reception disabled before doing so;
143 * fixed Cyclom-8YoP hardware detection bug.
144 *
145 * Revision 2.2.1.6 1998/08/20 17:15:39 ivan
146 * Fixed bug in cy_close function, which causes malfunction
147 * of one of the first 4 ports when a higher port is closed
148 * (Cyclom-Y only).
149 *
150 * Revision 2.2.1.5 1998/08/10 18:10:28 ivan
151 * Fixed Cyclom-4Yo hardware detection bug.
152 *
153 * Revision 2.2.1.4 1998/08/04 11:02:50 ivan
154 * /proc/cyclades implementation with great collaboration of
155 * Marc Lewis <marc@blarg.net>;
156 * cyy_interrupt was changed to avoid occurrence of kernel oopses
157 * during PPP operation.
158 *
159 * Revision 2.2.1.3 1998/06/01 12:09:10 ivan
160 * General code review in order to comply with 2.1 kernel standards;
161 * data loss prevention for slow devices revisited (cy_wait_until_sent
162 * was created);
163 * removed conditional compilation for new/old PCI structure support
164 * (now the driver only supports the new PCI structure).
165 *
166 * Revision 2.2.1.1 1998/03/19 16:43:12 ivan
167 * added conditional compilation for new/old PCI structure support;
168 * removed kernel series (2.0.x / 2.1.x) conditional compilation.
169 *
170 * Revision 2.1.1.3 1998/03/16 18:01:12 ivan
171 * cleaned up the data loss fix;
172 * fixed XON/XOFF handling once more (Cyclades-Z);
173 * general review of the driver routines;
174 * introduction of a mechanism to prevent data loss with slow
175 * printers, by forcing a delay before closing the port.
176 *
177 * Revision 2.1.1.2 1998/02/17 16:50:00 ivan
178 * fixed detection/handling of new CD1400 in Ye boards;
179 * fixed XON/XOFF handling (Cyclades-Z);
180 * fixed data loss caused by a premature port close;
181 * introduction of a flag that holds the CD1400 version ID per port
182 * (used by the CYGETCD1400VER new ioctl).
183 *
184 * Revision 2.1.1.1 1997/12/03 17:31:19 ivan
185 * Code review for the module cleanup routine;
186 * fixed RTS and DTR status report for new CD1400's in get_modem_info;
187 * includes anonymous changes regarding signal_pending.
188 *
189 * Revision 2.1 1997/11/01 17:42:41 ivan
190 * Changes in the driver to support Alpha systems (except 8Zo V_1);
191 * BREAK fix for the Cyclades-Z boards;
192 * driver inactivity control by FW implemented;
193 * introduction of flag that allows driver to take advantage of
194 * a special CD1400 feature related to HW flow control;
195 * added support for the CD1400 rev. J (Cyclom-Y boards);
196 * introduction of ioctls to:
197 * - control the rtsdtr_inv flag (Cyclom-Y);
198 * - control the rflow flag (Cyclom-Y);
199 * - adjust the polling interval (Cyclades-Z);
200 *
201 * Revision 1.36.4.33 1997/06/27 19:00:00 ivan
202 * Fixes related to kernel version conditional
203 * compilation.
204 *
205 * Revision 1.36.4.32 1997/06/14 19:30:00 ivan
206 * Compatibility issues between kernels 2.0.x and
207 * 2.1.x (mainly related to clear_bit function).
208 *
209 * Revision 1.36.4.31 1997/06/03 15:30:00 ivan
210 * Changes to define the memory window according to the
211 * board type.
212 *
213 * Revision 1.36.4.30 1997/05/16 15:30:00 daniel
214 * Changes to support new cycladesZ boards.
215 *
216 * Revision 1.36.4.29 1997/05/12 11:30:00 daniel
217 * Merge of Bentson's and Daniel's version 1.36.4.28.
218 * Corrects bug in cy_detect_pci: check if there are more
219 * ports than the number of static structs allocated.
220 * Warning message during initialization if this driver is
221 * used with the new generation of cycladesZ boards. Those
222 * will be supported only in next release of the driver.
223 * Corrects bug in cy_detect_pci and cy_detect_isa that
224 * returned wrong number of VALID boards, when a cyclomY
225 * was found with no serial modules connected.
226 * Changes to use current (2.1.x) kernel subroutine names
227 * and created macros for compilation with 2.0.x kernel,
228 * instead of the other way around.
229 *
230 * Revision 1.36.4.28 1997/05/?? ??:00:00 bentson
231 * Change queue_task_irq_off to queue_task_irq.
232 * The inline function queue_task_irq_off (tqueue.h)
233 * was removed from latest releases of 2.1.x kernel.
234 * Use of macro __init to mark the initialization
235 * routines, so memory can be reused.
236 * Also incorporate implementation of critical region
237 * in function cleanup_module() created by anonymous
238 * linuxer.
239 *
240 * Revision 1.36.4.28 1997/04/25 16:00:00 daniel
241 * Change to support new firmware that solves DCD problem:
242 * application could fail to receive SIGHUP signal when DCD
243 * varying too fast.
244 *
245 * Revision 1.36.4.27 1997/03/26 10:30:00 daniel
246 * Changed for support linux versions 2.1.X.
247 * Backward compatible with linux versions 2.0.X.
248 * Corrected illegal use of filler field in
249 * CH_CTRL struct.
250 * Deleted some debug messages.
251 *
252 * Revision 1.36.4.26 1997/02/27 12:00:00 daniel
253 * Included check for NULL tty pointer in cyz_poll.
254 *
255 * Revision 1.36.4.25 1997/02/26 16:28:30 bentson
256 * Bill Foster at Blarg! Online services noticed that
257 * some of the switch elements of -Z modem control
258 * lacked a closing "break;"
259 *
260 * Revision 1.36.4.24 1997/02/24 11:00:00 daniel
261 * Changed low water threshold for buffer xmit_buf
262 *
263 * Revision 1.36.4.23 1996/12/02 21:50:16 bentson
264 * Marcio provided fix to modem status fetch for -Z
265 *
266 * Revision 1.36.4.22 1996/10/28 22:41:17 bentson
267 * improve mapping of -Z control page (thanks to Steve
268 * Price <stevep@fa.tdktca.com> for help on this)
269 *
270 * Revision 1.36.4.21 1996/09/10 17:00:10 bentson
271 * shift from CPU-bound to memcopy in cyz_polling operation
272 *
273 * Revision 1.36.4.20 1996/09/09 18:30:32 Bentson
274 * Added support to set and report higher speeds.
275 *
276 * Revision 1.36.4.19c 1996/08/09 10:00:00 Marcio Saito
277 * Some fixes in the HW flow control for the BETA release.
278 * Don't try to register the IRQ.
279 *
280 * Revision 1.36.4.19 1996/08/08 16:23:18 Bentson
281 * make sure "cyc" appears in all kernel messages; all soft interrupts
282 * handled by same routine; recognize out-of-band reception; comment
283 * out some diagnostic messages; leave RTS/CTS flow control to hardware;
284 * fix race condition in -Z buffer management; only -Y needs to explicitly
285 * flush chars; tidy up some startup messages;
286 *
287 * Revision 1.36.4.18 1996/07/25 18:57:31 bentson
288 * shift MOD_INC_USE_COUNT location to match
289 * serial.c; purge some diagnostic messages;
290 *
291 * Revision 1.36.4.17 1996/07/25 18:01:08 bentson
292 * enable modem status messages and fetch & process them; note
293 * time of last activity type for each port; set_line_char now
294 * supports more than line 0 and treats 0 baud correctly;
295 * get_modem_info senses rs_status;
296 *
297 * Revision 1.36.4.16 1996/07/20 08:43:15 bentson
298 * barely works--now's time to turn on
299 * more features 'til it breaks
300 *
301 * Revision 1.36.4.15 1996/07/19 22:30:06 bentson
302 * check more -Z board status; shorten boot message
303 *
304 * Revision 1.36.4.14 1996/07/19 22:20:37 bentson
305 * fix reference to ch_ctrl in startup; verify return
306 * values from cyz_issue_cmd and cyz_update_channel;
307 * more stuff to get modem control correct;
308 *
309 * Revision 1.36.4.13 1996/07/11 19:53:33 bentson
310 * more -Z stuff folded in; re-order changes to put -Z stuff
311 * after -Y stuff (to make changes clearer)
312 *
313 * Revision 1.36.4.12 1996/07/11 15:40:55 bentson
314 * Add code to poll Cyclades-Z. Add code to get & set RS-232 control.
315 * Add code to send break. Clear firmware ID word at startup (so
316 * that other code won't talk to inactive board).
317 *
318 * Revision 1.36.4.11 1996/07/09 05:28:29 bentson
319 * add code for -Z in set_line_char
320 *
321 * Revision 1.36.4.10 1996/07/08 19:28:37 bentson
322 * fold more -Z stuff (or in some cases, error messages)
323 * into driver; add text to "don't know what to do" messages.
324 *
325 * Revision 1.36.4.9 1996/07/08 18:38:38 bentson
326 * moved compile-time flags near top of file; cosmetic changes
327 * to narrow text (to allow 2-up printing); changed many declarations
328 * to "static" to limit external symbols; shuffled code order to
329 * coalesce -Y and -Z specific code, also to put internal functions
330 * in order of tty_driver structure; added code to recognize -Z
331 * ports (and for moment, do nothing or report error); add cy_startup
332 * to parse boot command line for extra base addresses for ISA probes;
333 *
334 * Revision 1.36.4.8 1996/06/25 17:40:19 bentson
335 * reorder some code, fix types of some vars (int vs. long),
336 * add cy_setup to support user declared ISA addresses
337 *
338 * Revision 1.36.4.7 1996/06/21 23:06:18 bentson
339 * dump ioctl based firmware load (it's now a user level
340 * program); ensure uninitialzed ports cannot be used
341 *
342 * Revision 1.36.4.6 1996/06/20 23:17:19 bentson
343 * rename vars and restructure some code
344 *
345 * Revision 1.36.4.5 1996/06/14 15:09:44 bentson
346 * get right status back after boot load
347 *
348 * Revision 1.36.4.4 1996/06/13 19:51:44 bentson
349 * successfully loads firmware
350 *
351 * Revision 1.36.4.3 1996/06/13 06:08:33 bentson
352 * add more of the code for the boot/load ioctls
353 *
354 * Revision 1.36.4.2 1996/06/11 21:00:51 bentson
355 * start to add Z functionality--starting with ioctl
356 * for loading firmware
357 *
358 * Revision 1.36.4.1 1996/06/10 18:03:02 bentson
359 * added code to recognize Z/PCI card at initialization; report
360 * presence, but card is not initialized (because firmware needs
361 * to be loaded)
362 *
363 * Revision 1.36.3.8 1996/06/07 16:29:00 bentson
364 * starting minor number at zero; added missing verify_area
365 * as noted by Heiko Eissfeldt <heiko@colossus.escape.de>
366 *
367 * Revision 1.36.3.7 1996/04/19 21:06:18 bentson
368 * remove unneeded boot message & fix CLOCAL hardware flow
369 * control (Miquel van Smoorenburg <miquels@Q.cistron.nl>);
370 * remove unused diagnostic statements; minor 0 is first;
371 *
372 * Revision 1.36.3.6 1996/03/13 13:21:17 marcio
373 * The kernel function vremap (available only in later 1.3.xx kernels)
374 * allows the access to memory addresses above the RAM. This revision
375 * of the driver supports PCI boards below 1Mb (device id 0x100) and
376 * above 1Mb (device id 0x101).
377 *
378 * Revision 1.36.3.5 1996/03/07 15:20:17 bentson
379 * Some global changes to interrupt handling spilled into
380 * this driver--mostly unused arguments in system function
381 * calls. Also added change by Marcio Saito which should
382 * reduce lost interrupts at startup by fast processors.
383 *
384 * Revision 1.36.3.4 1995/11/13 20:45:10 bentson
385 * Changes by Corey Minyard <minyard@wf-rch.cirr.com> distributed
386 * in 1.3.41 kernel to remove a possible race condition, extend
387 * some error messages, and let the driver run as a loadable module
388 * Change by Alan Wendt <alan@ez0.ezlink.com> to remove a
389 * possible race condition.
390 * Change by Marcio Saito <marcio@cyclades.com> to fix PCI addressing.
391 *
392 * Revision 1.36.3.3 1995/11/13 19:44:48 bentson
393 * Changes by Linus Torvalds in 1.3.33 kernel distribution
394 * required due to reordering of driver initialization.
395 * Drivers are now initialized *after* memory management.
396 *
397 * Revision 1.36.3.2 1995/09/08 22:07:14 bentson
398 * remove printk from ISR; fix typo
399 *
400 * Revision 1.36.3.1 1995/09/01 12:00:42 marcio
401 * Minor fixes in the PCI board support. PCI function calls in
402 * conditional compilation (CONFIG_PCI). Thanks to Jim Duncan
403 * <duncan@okay.com>. "bad serial count" message removed.
404 *
405 * Revision 1.36.3 1995/08/22 09:19:42 marcio
406 * Cyclom-Y/PCI support added. Changes in the cy_init routine and
407 * board initialization. Changes in the boot messages. The driver
408 * supports up to 4 boards and 64 ports by default.
409 *
410 * Revision 1.36.1.4 1995/03/29 06:14:14 bentson
411 * disambiguate between Cyclom-16Y and Cyclom-32Ye;
412 *
413 * Revision 1.36.1.3 1995/03/23 22:15:35 bentson
414 * add missing break in modem control block in ioctl switch statement
415 * (discovered by Michael Edward Chastain <mec@jobe.shell.portal.com>);
416 *
417 * Revision 1.36.1.2 1995/03/22 19:16:22 bentson
418 * make sure CTS flow control is set as soon as possible (thanks
419 * to note from David Lambert <lambert@chesapeake.rps.slb.com>);
420 *
421 * Revision 1.36.1.1 1995/03/13 15:44:43 bentson
422 * initialize defaults for receive threshold and stale data timeout;
423 * cosmetic changes;
424 *
425 * Revision 1.36 1995/03/10 23:33:53 bentson
426 * added support of chips 4-7 in 32 port Cyclom-Ye;
427 * fix cy_interrupt pointer dereference problem
428 * (Joe Portman <baron@aa.net>);
429 * give better error response if open is attempted on non-existent port
430 * (Zachariah Vaum <jchryslr@netcom.com>);
431 * correct command timeout (Kenneth Lerman <lerman@@seltd.newnet.com>);
432 * conditional compilation for -16Y on systems with fast, noisy bus;
433 * comment out diagnostic print function;
434 * cleaned up table of base addresses;
435 * set receiver time-out period register to correct value,
436 * set receive threshold to better default values,
437 * set chip timer to more accurate 200 Hz ticking,
438 * add code to monitor and modify receive parameters
439 * (Rik Faith <faith@cs.unc.edu> Nick Simicich
440 * <njs@scifi.emi.net>);
441 *
442 * Revision 1.35 1994/12/16 13:54:18 steffen
443 * additional patch by Marcio Saito for board detection
444 * Accidently left out in 1.34
445 *
446 * Revision 1.34 1994/12/10 12:37:12 steffen
447 * This is the corrected version as suggested by Marcio Saito
448 *
449 * Revision 1.33 1994/12/01 22:41:18 bentson
450 * add hooks to support more high speeds directly; add tytso
451 * patch regarding CLOCAL wakeups
452 *
453 * Revision 1.32 1994/11/23 19:50:04 bentson
454 * allow direct kernel control of higher signalling rates;
455 * look for cards at additional locations
456 *
457 * Revision 1.31 1994/11/16 04:33:28 bentson
458 * ANOTHER fix from Corey Minyard, minyard@wf-rch.cirr.com--
459 * a problem in chars_in_buffer has been resolved by some
460 * small changes; this should yield smoother output
461 *
462 * Revision 1.30 1994/11/16 04:28:05 bentson
463 * Fix from Corey Minyard, Internet: minyard@metronet.com,
464 * UUCP: minyard@wf-rch.cirr.com, WORK: minyardbnr.ca, to
465 * cy_hangup that appears to clear up much (all?) of the
466 * DTR glitches; also he's added/cleaned-up diagnostic messages
467 *
468 * Revision 1.29 1994/11/16 04:16:07 bentson
469 * add change proposed by Ralph Sims, ralphs@halcyon.com, to
470 * operate higher speeds in same way as other serial ports;
471 * add more serial ports (for up to two 16-port muxes).
472 *
473 * Revision 1.28 1994/11/04 00:13:16 root
474 * turn off diagnostic messages
475 *
476 * Revision 1.27 1994/11/03 23:46:37 root
477 * bunch of changes to bring driver into greater conformance
478 * with the serial.c driver (looking for missed fixes)
479 *
480 * Revision 1.26 1994/11/03 22:40:36 root
481 * automatic interrupt probing fixed.
482 *
483 * Revision 1.25 1994/11/03 20:17:02 root
484 * start to implement auto-irq
485 *
486 * Revision 1.24 1994/11/03 18:01:55 root
487 * still working on modem signals--trying not to drop DTR
488 * during the getty/login processes
489 *
490 * Revision 1.23 1994/11/03 17:51:36 root
491 * extend baud rate support; set receive threshold as function
492 * of baud rate; fix some problems with RTS/CTS;
493 *
494 * Revision 1.22 1994/11/02 18:05:35 root
495 * changed arguments to udelay to type long to get
496 * delays to be of correct duration
497 *
498 * Revision 1.21 1994/11/02 17:37:30 root
499 * employ udelay (after calibrating loops_per_second earlier
500 * in init/main.c) instead of using home-grown delay routines
501 *
502 * Revision 1.20 1994/11/02 03:11:38 root
503 * cy_chars_in_buffer forces a return value of 0 to let
504 * login work (don't know why it does); some functions
505 * that were returning EFAULT, now executes the code;
506 * more work on deciding when to disable xmit interrupts;
507 *
508 * Revision 1.19 1994/11/01 20:10:14 root
509 * define routine to start transmission interrupts (by enabling
510 * transmit interrupts); directly enable/disable modem interrupts;
511 *
512 * Revision 1.18 1994/11/01 18:40:45 bentson
513 * Don't always enable transmit interrupts in startup; interrupt on
514 * TxMpty instead of TxRdy to help characters get out before shutdown;
515 * restructure xmit interrupt to check for chars first and quit if
516 * none are ready to go; modem status (MXVRx) is upright, _not_ inverted
517 * (to my view);
518 *
519 * Revision 1.17 1994/10/30 04:39:45 bentson
520 * rename serial_driver and callout_driver to cy_serial_driver and
521 * cy_callout_driver to avoid linkage interference; initialize
522 * info->type to PORT_CIRRUS; ruggedize paranoia test; elide ->port
523 * from cyclades_port structure; add paranoia check to cy_close;
524 *
525 * Revision 1.16 1994/10/30 01:14:33 bentson
526 * change major numbers; add some _early_ return statements;
527 *
528 * Revision 1.15 1994/10/29 06:43:15 bentson
529 * final tidying up for clean compile; enable some error reporting
530 *
531 * Revision 1.14 1994/10/28 20:30:22 Bentson
532 * lots of changes to drag the driver towards the new tty_io
533 * structures and operation. not expected to work, but may
534 * compile cleanly.
535 *
536 * Revision 1.13 1994/07/21 23:08:57 Bentson
537 * add some diagnostic cruft; support 24 lines (for testing
538 * both -8Y and -16Y cards; be more thorough in servicing all
539 * chips during interrupt; add "volatile" a few places to
540 * circumvent compiler optimizations; fix base & offset
541 * computations in block_til_ready (was causing chip 0 to
542 * stop operation)
543 *
544 * Revision 1.12 1994/07/19 16:42:11 Bentson
545 * add some hackery for kernel version 1.1.8; expand
546 * error messages; refine timing for delay loops and
547 * declare loop params volatile
548 *
549 * Revision 1.11 1994/06/11 21:53:10 bentson
550 * get use of save_car right in transmit interrupt service
551 *
552 * Revision 1.10.1.1 1994/06/11 21:31:18 bentson
553 * add some diagnostic printing; try to fix save_car stuff
554 *
555 * Revision 1.10 1994/06/11 20:36:08 bentson
556 * clean up compiler warnings
557 *
558 * Revision 1.9 1994/06/11 19:42:46 bentson
559 * added a bunch of code to support modem signalling
560 *
561 * Revision 1.8 1994/06/11 17:57:07 bentson
562 * recognize break & parity error
563 *
564 * Revision 1.7 1994/06/05 05:51:34 bentson
565 * Reorder baud table to be monotonic; add cli to CP; discard
566 * incoming characters and status if the line isn't open; start to
567 * fold code into cy_throttle; start to port get_serial_info,
568 * set_serial_info, get_modem_info, set_modem_info, and send_break
569 * from serial.c; expand cy_ioctl; relocate and expand config_setup;
570 * get flow control characters from tty struct; invalidate ports w/o
571 * hardware;
572 *
573 * Revision 1.6 1994/05/31 18:42:21 bentson
574 * add a loop-breaker in the interrupt service routine;
575 * note when port is initialized so that it can be shut
576 * down under the right conditions; receive works without
577 * any obvious errors
578 *
579 * Revision 1.5 1994/05/30 00:55:02 bentson
580 * transmit works without obvious errors
581 *
582 * Revision 1.4 1994/05/27 18:46:27 bentson
583 * incorporated more code from lib_y.c; can now print short
584 * strings under interrupt control to port zero; seems to
585 * select ports/channels/lines correctly
586 *
587 * Revision 1.3 1994/05/25 22:12:44 bentson
588 * shifting from multi-port on a card to proper multiplexor
589 * data structures; added skeletons of most routines
590 *
591 * Revision 1.2 1994/05/19 13:21:43 bentson
592 * start to crib from other sources
593 *
594 */
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 ;
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 #define JIFFIES_DIFF(n, j) ((j) - (n))
702
703 static struct tty_driver *cy_serial_driver;
704
705 #ifdef CONFIG_ISA
706 /* This is the address lookup table. The driver will probe for
707 Cyclom-Y/ISA boards at all addresses in here. If you want the
708 driver to probe addresses at a different address, add it to
709 this table. If the driver is probing some other board and
710 causing problems, remove the offending address from this table.
711 The cy_setup function extracts additional addresses from the
712 boot options line. The form is "cyclades=address,address..."
713 */
714
715 static unsigned int cy_isa_addresses[] = {
716 0xD0000,
717 0xD2000,
718 0xD4000,
719 0xD6000,
720 0xD8000,
721 0xDA000,
722 0xDC000,
723 0xDE000,
724 0,0,0,0,0,0,0,0
725 };
726 #define NR_ISA_ADDRS ARRAY_SIZE(cy_isa_addresses)
727
728 #ifdef MODULE
729 static long maddr[NR_CARDS] = { 0, };
730 static int irq[NR_CARDS] = { 0, };
731
732 module_param_array(maddr, long, NULL, 0);
733 module_param_array(irq, int, NULL, 0);
734 #endif
735
736 #endif /* CONFIG_ISA */
737
738 /* This is the per-card data structure containing address, irq, number of
739 channels, etc. This driver supports a maximum of NR_CARDS cards.
740 */
741 static struct cyclades_card cy_card[NR_CARDS];
742
743 /* This is the per-channel data structure containing pointers, flags
744 and variables for the port. This driver supports a maximum of NR_PORTS.
745 */
746 static struct cyclades_port cy_port[NR_PORTS];
747
748 static int cy_next_channel; /* next minor available */
749
750 /*
751 * This is used to look up the divisor speeds and the timeouts
752 * We're normally limited to 15 distinct baud rates. The extra
753 * are accessed via settings in info->flags.
754 * 0, 1, 2, 3, 4, 5, 6, 7, 8, 9,
755 * 10, 11, 12, 13, 14, 15, 16, 17, 18, 19,
756 * HI VHI
757 * 20
758 */
759 static int baud_table[] = {
760 0, 50, 75, 110, 134, 150, 200, 300, 600, 1200,
761 1800, 2400, 4800, 9600, 19200, 38400, 57600, 76800,115200,150000,
762 230400, 0};
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 static char baud_bpr_25[] = { /* 25 MHz baud rate period table */
771 0x00, 0xf5, 0xa3, 0x6f, 0x5c, 0x51, 0xf5, 0xa3, 0x51, 0xa3,
772 0x6d, 0x51, 0xa3, 0x51, 0xa3, 0x51, 0x36, 0x29, 0x1b, 0x15};
773
774 static char baud_co_60[] = { /* 60 MHz clock option table (CD1400 J) */
775 /* value => 00 01 02 03 04 */
776 /* divide by 8 32 128 512 2048 */
777 0x00, 0x00, 0x00, 0x04, 0x04, 0x04, 0x04, 0x04, 0x03, 0x03,
778 0x03, 0x02, 0x02, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00,
779 0x00};
780
781 static char baud_bpr_60[] = { /* 60 MHz baud rate period table (CD1400 J) */
782 0x00, 0x82, 0x21, 0xff, 0xdb, 0xc3, 0x92, 0x62, 0xc3, 0x62,
783 0x41, 0xc3, 0x62, 0xc3, 0x62, 0xc3, 0x82, 0x62, 0x41, 0x32,
784 0x21};
785
786 static char baud_cor3[] = { /* receive threshold */
787 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a,
788 0x0a, 0x0a, 0x0a, 0x09, 0x09, 0x08, 0x08, 0x08, 0x08, 0x07,
789 0x07};
790
791 /*
792 * The Cyclades driver implements HW flow control as any serial driver.
793 * The cyclades_port structure member rflow and the vector rflow_thr
794 * allows us to take advantage of a special feature in the CD1400 to avoid
795 * data loss even when the system interrupt latency is too high. These flags
796 * are to be used only with very special applications. Setting these flags
797 * requires the use of a special cable (DTR and RTS reversed). In the new
798 * CD1400-based boards (rev. 6.00 or later), there is no need for special
799 * cables.
800 */
801
802 static char rflow_thr[] = { /* rflow threshold */
803 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
804 0x00, 0x00, 0x00, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a,
805 0x0a};
806
807 /* The Cyclom-Ye has placed the sequential chips in non-sequential
808 * address order. This look-up table overcomes that problem.
809 */
810 static int cy_chip_offset [] =
811 { 0x0000,
812 0x0400,
813 0x0800,
814 0x0C00,
815 0x0200,
816 0x0600,
817 0x0A00,
818 0x0E00
819 };
820
821 /* PCI related definitions */
822
823 static unsigned short cy_pci_nboard;
824 static unsigned short cy_isa_nboard;
825 static unsigned short cy_nboard;
826 #ifdef CONFIG_PCI
827 static unsigned short cy_pci_dev_id[] = {
828 PCI_DEVICE_ID_CYCLOM_Y_Lo, /* PCI < 1Mb */
829 PCI_DEVICE_ID_CYCLOM_Y_Hi, /* PCI > 1Mb */
830 PCI_DEVICE_ID_CYCLOM_4Y_Lo, /* 4Y PCI < 1Mb */
831 PCI_DEVICE_ID_CYCLOM_4Y_Hi, /* 4Y PCI > 1Mb */
832 PCI_DEVICE_ID_CYCLOM_8Y_Lo, /* 8Y PCI < 1Mb */
833 PCI_DEVICE_ID_CYCLOM_8Y_Hi, /* 8Y PCI > 1Mb */
834 PCI_DEVICE_ID_CYCLOM_Z_Lo, /* Z PCI < 1Mb */
835 PCI_DEVICE_ID_CYCLOM_Z_Hi, /* Z PCI > 1Mb */
836 0 /* end of table */
837 };
838 #endif
839
840 static void cy_start(struct tty_struct *);
841 static void set_line_char(struct cyclades_port *);
842 static int cyz_issue_cmd(struct cyclades_card *, uclong, ucchar, uclong);
843 #ifdef CONFIG_ISA
844 static unsigned detect_isa_irq(void __iomem *);
845 #endif /* CONFIG_ISA */
846
847 static int cyclades_get_proc_info(char *, char **, off_t , int , int *, void *);
848
849 #ifndef CONFIG_CYZ_INTR
850 static void cyz_poll(unsigned long);
851
852 /* The Cyclades-Z polling cycle is defined by this variable */
853 static long cyz_polling_cycle = CZ_DEF_POLL;
854
855 static int cyz_timeron = 0;
856 static DEFINE_TIMER(cyz_timerlist, cyz_poll, 0, 0);
857
858 #else /* CONFIG_CYZ_INTR */
859 static void cyz_rx_restart(unsigned long);
860 static struct timer_list cyz_rx_full_timer[NR_PORTS];
861 #endif /* CONFIG_CYZ_INTR */
862
863 static inline int
864 serial_paranoia_check(struct cyclades_port *info,
865 char *name, const char *routine)
866 {
867 #ifdef SERIAL_PARANOIA_CHECK
868 static const char *badmagic =
869 "cyc Warning: bad magic number for serial struct (%s) in %s\n";
870 static const char *badinfo =
871 "cyc Warning: null cyclades_port for (%s) in %s\n";
872 static const char *badrange =
873 "cyc Warning: cyclades_port out of range for (%s) in %s\n";
874
875 if (!info) {
876 printk(badinfo, name, routine);
877 return 1;
878 }
879
880 if( (long)info < (long)(&cy_port[0])
881 || (long)(&cy_port[NR_PORTS]) < (long)info ){
882 printk(badrange, name, routine);
883 return 1;
884 }
885
886 if (info->magic != CYCLADES_MAGIC) {
887 printk(badmagic, name, routine);
888 return 1;
889 }
890 #endif
891 return 0;
892 } /* serial_paranoia_check */
893
894 /*
895 * This routine is used by the interrupt handler to schedule
896 * processing in the software interrupt portion of the driver
897 * (also known as the "bottom half"). This can be called any
898 * number of times for any channel without harm.
899 */
900 static inline void
901 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 /*
909 * This routine is used to handle the "bottom half" processing for the
910 * serial driver, known also the "software interrupt" processing.
911 * This processing is done at the kernel interrupt level, after the
912 * cy#/_interrupt() has returned, BUT WITH INTERRUPTS TURNED ON. This
913 * is where time-consuming activities which can not be done in the
914 * interrupt driver proper are done; the interrupt driver schedules
915 * them using cy_sched_event(), and they get done here.
916 *
917 * This is done through one level of indirection--the task queue.
918 * When a hardware interrupt service routine wants service by the
919 * driver's bottom half, it enqueues the appropriate tq_struct (one
920 * per port) to the keventd work queue and sets a request flag
921 * that the work queue be processed.
922 *
923 * Although this may seem unwieldy, it gives the system a way to
924 * pass an argument (in this case the pointer to the cyclades_port
925 * structure) to the bottom half of the driver. Previous kernels
926 * had to poll every port to see if that port needed servicing.
927 */
928 static void
929 do_softint(void *private_)
930 {
931 struct cyclades_port *info = (struct cyclades_port *) private_;
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 }
946 #ifdef CONFIG_CYZ_INTR
947 if (test_and_clear_bit(Cy_EVENT_Z_RX_FULL, &info->event)) {
948 if (cyz_rx_full_timer[info->line].function == NULL) {
949 cyz_rx_full_timer[info->line].expires = jiffies + 1;
950 cyz_rx_full_timer[info->line].function = cyz_rx_restart;
951 cyz_rx_full_timer[info->line].data = (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 }
959 if (test_and_clear_bit(Cy_EVENT_WRITE_WAKEUP, &info->event)) {
960 tty_wakeup(tty);
961 wake_up_interruptible(&tty->write_wait);
962 }
963 #ifdef Z_WAKE
964 if (test_and_clear_bit(Cy_EVENT_SHUTDOWN_WAKEUP, &info->event)) {
965 wake_up_interruptible(&info->shutdown_wait);
966 }
967 #endif
968 } /* do_softint */
969
970
971 /***********************************************************/
972 /********* Start of block of Cyclom-Y specific code ********/
973
974 /* This routine waits up to 1000 micro-seconds for the previous
975 command to the Cirrus chip to complete and then issues the
976 new command. An error is returned if the previous command
977 didn't finish within the time limit.
978
979 This function is only called from inside spinlock-protected code.
980 */
981 static int
982 cyy_issue_cmd(void __iomem *base_addr, u_char cmd, int index)
983 {
984 volatile int i;
985
986 /* Check to see that the previous command has completed */
987 for(i = 0 ; i < 100 ; i++){
988 if (cy_readb(base_addr+(CyCCR<<index)) == 0){
989 break;
990 }
991 udelay(10L);
992 }
993 /* if the CCR never cleared, the previous command
994 didn't finish within the "reasonable time" */
995 if (i == 100) return (-1);
996
997 /* Issue the new command */
998 cy_writeb(base_addr+(CyCCR<<index), cmd);
999
1000 return(0);
1001 } /* cyy_issue_cmd */
1002
1003 #ifdef CONFIG_ISA
1004 /* ISA interrupt detection code */
1005 static unsigned
1006 detect_isa_irq(void __iomem *address)
1007 {
1008 int irq;
1009 unsigned long irqs, flags;
1010 int save_xir, save_car;
1011 int index = 0; /* IRQ probing is only for ISA */
1012
1013 /* forget possible initially masked and pending IRQ */
1014 irq = probe_irq_off(probe_irq_on());
1015
1016 /* Clear interrupts on the board first */
1017 cy_writeb(address + (Cy_ClrIntr<<index), 0);
1018 /* Cy_ClrIntr is 0x1800 */
1019
1020 irqs = probe_irq_on();
1021 /* Wait ... */
1022 udelay(5000L);
1023
1024 /* Enable the Tx interrupts on the CD1400 */
1025 local_irq_save(flags);
1026 cy_writeb(address + (CyCAR<<index), 0);
1027 cyy_issue_cmd(address, CyCHAN_CTL|CyENB_XMTR, index);
1028
1029 cy_writeb(address + (CyCAR<<index), 0);
1030 cy_writeb(address + (CySRER<<index),
1031 cy_readb(address + (CySRER<<index)) | CyTxRdy);
1032 local_irq_restore(flags);
1033
1034 /* Wait ... */
1035 udelay(5000L);
1036
1037 /* Check which interrupt is in use */
1038 irq = probe_irq_off(irqs);
1039
1040 /* Clean up */
1041 save_xir = (u_char) cy_readb(address + (CyTIR<<index));
1042 save_car = cy_readb(address + (CyCAR<<index));
1043 cy_writeb(address + (CyCAR<<index), (save_xir & 0x3));
1044 cy_writeb(address + (CySRER<<index),
1045 cy_readb(address + (CySRER<<index)) & ~CyTxRdy);
1046 cy_writeb(address + (CyTIR<<index), (save_xir & 0x3f));
1047 cy_writeb(address + (CyCAR<<index), (save_car));
1048 cy_writeb(address + (Cy_ClrIntr<<index), 0);
1049 /* Cy_ClrIntr is 0x1800 */
1050
1051 return (irq > 0)? irq : 0;
1052 }
1053 #endif /* CONFIG_ISA */
1054
1055 /* The real interrupt service routine is called
1056 whenever the card wants its hand held--chars
1057 received, out buffer empty, modem change, etc.
1058 */
1059 static irqreturn_t
1060 cyy_interrupt(int irq, void *dev_id)
1061 {
1062 struct tty_struct *tty;
1063 int status;
1064 struct cyclades_card *cinfo;
1065 struct cyclades_port *info;
1066 void __iomem *base_addr, *card_base_addr;
1067 int chip;
1068 int save_xir, channel, save_car;
1069 char data;
1070 volatile int char_count;
1071 int outch;
1072 int i,j,index;
1073 int too_many;
1074 int had_work;
1075 int mdm_change;
1076 int mdm_status;
1077 int len;
1078 if((cinfo = (struct cyclades_card *)dev_id) == 0){
1079 #ifdef CY_DEBUG_INTERRUPTS
1080 printk("cyy_interrupt: spurious interrupt %d\n\r", irq);
1081 #endif
1082 return IRQ_NONE; /* spurious interrupt */
1083 }
1084
1085 card_base_addr = cinfo->base_addr;
1086 index = cinfo->bus_index;
1087
1088
1089 /* This loop checks all chips in the card. Make a note whenever
1090 _any_ chip had some work to do, as this is considered an
1091 indication that there will be more to do. Only when no chip
1092 has any work does this outermost loop exit.
1093 */
1094 do{
1095 had_work = 0;
1096 for ( chip = 0 ; chip < cinfo->num_chips ; chip ++) {
1097 base_addr = cinfo->base_addr + (cy_chip_offset[chip]<<index);
1098 too_many = 0;
1099 while ( (status = cy_readb(base_addr+(CySVRR<<index))) != 0x00) {
1100 had_work++;
1101 /* The purpose of the following test is to ensure that
1102 no chip can monopolize the driver. This forces the
1103 chips to be checked in a round-robin fashion (after
1104 draining each of a bunch (1000) of characters).
1105 */
1106 if(1000<too_many++){
1107 break;
1108 }
1109 if (status & CySRReceive) { /* reception interrupt */
1110 #ifdef CY_DEBUG_INTERRUPTS
1111 printk("cyy_interrupt: rcvd intr, chip %d\n\r", chip);
1112 #endif
1113 /* determine the channel & change to that context */
1114 spin_lock(&cinfo->card_lock);
1115 save_xir = (u_char) cy_readb(base_addr+(CyRIR<<index));
1116 channel = (u_short ) (save_xir & CyIRChannel);
1117 i = channel + chip * 4 + cinfo->first_line;
1118 info = &cy_port[i];
1119 info->last_active = jiffies;
1120 save_car = cy_readb(base_addr+(CyCAR<<index));
1121 cy_writeb(base_addr+(CyCAR<<index), save_xir);
1122
1123 /* if there is nowhere to put the data, discard it */
1124 if(info->tty == 0){
1125 j = (cy_readb(base_addr+(CyRIVR<<index)) & CyIVRMask);
1126 if ( j == CyIVRRxEx ) { /* exception */
1127 data = cy_readb(base_addr+(CyRDSR<<index));
1128 } else { /* normal character reception */
1129 char_count = cy_readb(base_addr+(CyRDCR<<index));
1130 while(char_count--){
1131 data = cy_readb(base_addr+(CyRDSR<<index));
1132 }
1133 }
1134 }else{ /* there is an open port for this data */
1135 tty = info->tty;
1136 j = (cy_readb(base_addr+(CyRIVR<<index)) & CyIVRMask);
1137 if ( j == CyIVRRxEx ) { /* exception */
1138 data = cy_readb(base_addr+(CyRDSR<<index));
1139
1140 /* For statistics only */
1141 if (data & CyBREAK)
1142 info->icount.brk++;
1143 else if(data & CyFRAME)
1144 info->icount.frame++;
1145 else if(data & CyPARITY)
1146 info->icount.parity++;
1147 else if(data & CyOVERRUN)
1148 info->icount.overrun++;
1149
1150 if(data & info->ignore_status_mask){
1151 info->icount.rx++;
1152 continue;
1153 }
1154 if (tty_buffer_request_room(tty, 1)) {
1155 if (data & info->read_status_mask){
1156 if(data & CyBREAK){
1157 tty_insert_flip_char(tty, cy_readb(base_addr+(CyRDSR<<index)), TTY_BREAK);
1158 info->icount.rx++;
1159 if (info->flags & ASYNC_SAK){
1160 do_SAK(tty);
1161 }
1162 }else if(data & CyFRAME){
1163 tty_insert_flip_char(tty, cy_readb(base_addr+(CyRDSR<<index)), TTY_FRAME);
1164 info->icount.rx++;
1165 info->idle_stats.frame_errs++;
1166 }else if(data & CyPARITY){
1167 /* Pieces of seven... */
1168 tty_insert_flip_char(tty, cy_readb(base_addr+(CyRDSR<<index)), TTY_PARITY);
1169 info->icount.rx++;
1170 info->idle_stats.parity_errs++;
1171 }else if(data & CyOVERRUN){
1172 tty_insert_flip_char(tty, 0, TTY_OVERRUN);
1173 info->icount.rx++;
1174 /* If the flip buffer itself is
1175 overflowing, we still lose
1176 the next incoming character.
1177 */
1178 tty_insert_flip_char(tty, cy_readb(base_addr+(CyRDSR<<index)), TTY_FRAME);
1179 info->icount.rx++;
1180 info->idle_stats.overruns++;
1181 /* These two conditions may imply */
1182 /* a normal read should be done. */
1183 /* }else if(data & CyTIMEOUT){ */
1184 /* }else if(data & CySPECHAR){ */
1185 }else {
1186 tty_insert_flip_char(tty, 0, TTY_NORMAL);
1187 info->icount.rx++;
1188 }
1189 }else{
1190 tty_insert_flip_char(tty, 0, TTY_NORMAL);
1191 info->icount.rx++;
1192 }
1193 }else{
1194 /* there was a software buffer
1195 overrun and nothing could be
1196 done about it!!! */
1197 info->icount.buf_overrun++;
1198 info->idle_stats.overruns++;
1199 }
1200 } else { /* normal character reception */
1201 /* load # chars available from the chip */
1202 char_count = cy_readb(base_addr+(CyRDCR<<index));
1203
1204 #ifdef CY_ENABLE_MONITORING
1205 ++info->mon.int_count;
1206 info->mon.char_count += char_count;
1207 if (char_count > info->mon.char_max)
1208 info->mon.char_max = char_count;
1209 info->mon.char_last = char_count;
1210 #endif
1211 len = tty_buffer_request_room(tty, char_count);
1212 while(len--){
1213 data = cy_readb(base_addr+(CyRDSR<<index));
1214 tty_insert_flip_char(tty, data, TTY_NORMAL);
1215 info->idle_stats.recv_bytes++;
1216 info->icount.rx++;
1217 #ifdef CY_16Y_HACK
1218 udelay(10L);
1219 #endif
1220 }
1221 info->idle_stats.recv_idle = jiffies;
1222 }
1223 tty_schedule_flip(tty);
1224 }
1225 /* end of service */
1226 cy_writeb(base_addr+(CyRIR<<index), (save_xir & 0x3f));
1227 cy_writeb(base_addr+(CyCAR<<index), (save_car));
1228 spin_unlock(&cinfo->card_lock);
1229 }
1230
1231
1232 if (status & CySRTransmit) { /* transmission interrupt */
1233 /* Since we only get here when the transmit buffer
1234 is empty, we know we can always stuff a dozen
1235 characters. */
1236 #ifdef CY_DEBUG_INTERRUPTS
1237 printk("cyy_interrupt: xmit intr, chip %d\n\r", chip);
1238 #endif
1239
1240 /* determine the channel & change to that context */
1241 spin_lock(&cinfo->card_lock);
1242 save_xir = (u_char) cy_readb(base_addr+(CyTIR<<index));
1243 channel = (u_short ) (save_xir & CyIRChannel);
1244 i = channel + chip * 4 + cinfo->first_line;
1245 save_car = cy_readb(base_addr+(CyCAR<<index));
1246 cy_writeb(base_addr+(CyCAR<<index), save_xir);
1247
1248 /* validate the port# (as configured and open) */
1249 if( (i < 0) || (NR_PORTS <= i) ){
1250 cy_writeb(base_addr+(CySRER<<index),
1251 cy_readb(base_addr+(CySRER<<index)) & ~CyTxRdy);
1252 goto txend;
1253 }
1254 info = &cy_port[i];
1255 info->last_active = jiffies;
1256 if(info->tty == 0){
1257 cy_writeb(base_addr+(CySRER<<index),
1258 cy_readb(base_addr+(CySRER<<index)) & ~CyTxRdy);
1259 goto txdone;
1260 }
1261
1262 /* load the on-chip space for outbound data */
1263 char_count = info->xmit_fifo_size;
1264
1265 if(info->x_char) { /* send special char */
1266 outch = info->x_char;
1267 cy_writeb(base_addr+(CyTDR<<index), outch);
1268 char_count--;
1269 info->icount.tx++;
1270 info->x_char = 0;
1271 }
1272
1273 if (info->breakon || info->breakoff) {
1274 if (info->breakon) {
1275 cy_writeb(base_addr + (CyTDR<<index), 0);
1276 cy_writeb(base_addr + (CyTDR<<index), 0x81);
1277 info->breakon = 0;
1278 char_count -= 2;
1279 }
1280 if (info->breakoff) {
1281 cy_writeb(base_addr + (CyTDR<<index), 0);
1282 cy_writeb(base_addr + (CyTDR<<index), 0x83);
1283 info->breakoff = 0;
1284 char_count -= 2;
1285 }
1286 }
1287
1288 while (char_count-- > 0){
1289 if (!info->xmit_cnt){
1290 if (cy_readb(base_addr+(CySRER<<index))&CyTxMpty) {
1291 cy_writeb(base_addr+(CySRER<<index),
1292 cy_readb(base_addr+(CySRER<<index)) &
1293 ~CyTxMpty);
1294 } else {
1295 cy_writeb(base_addr+(CySRER<<index),
1296 ((cy_readb(base_addr+(CySRER<<index))
1297 & ~CyTxRdy)
1298 | CyTxMpty));
1299 }
1300 goto txdone;
1301 }
1302 if (info->xmit_buf == 0){
1303 cy_writeb(base_addr+(CySRER<<index),
1304 cy_readb(base_addr+(CySRER<<index)) &
1305 ~CyTxRdy);
1306 goto txdone;
1307 }
1308 if (info->tty->stopped || info->tty->hw_stopped){
1309 cy_writeb(base_addr+(CySRER<<index),
1310 cy_readb(base_addr+(CySRER<<index)) &
1311 ~CyTxRdy);
1312 goto txdone;
1313 }
1314 /* Because the Embedded Transmit Commands have
1315 been enabled, we must check to see if the
1316 escape character, NULL, is being sent. If it
1317 is, we must ensure that there is room for it
1318 to be doubled in the output stream. Therefore
1319 we no longer advance the pointer when the
1320 character is fetched, but rather wait until
1321 after the check for a NULL output character.
1322 This is necessary because there may not be
1323 room for the two chars needed to send a NULL.)
1324 */
1325 outch = info->xmit_buf[info->xmit_tail];
1326 if( outch ){
1327 info->xmit_cnt--;
1328 info->xmit_tail = (info->xmit_tail + 1)
1329 & (SERIAL_XMIT_SIZE - 1);
1330 cy_writeb(base_addr+(CyTDR<<index), outch);
1331 info->icount.tx++;
1332 }else{
1333 if(char_count > 1){
1334 info->xmit_cnt--;
1335 info->xmit_tail = (info->xmit_tail + 1)
1336 & (SERIAL_XMIT_SIZE - 1);
1337 cy_writeb(base_addr+(CyTDR<<index),
1338 outch);
1339 cy_writeb(base_addr+(CyTDR<<index), 0);
1340 info->icount.tx++;
1341 char_count--;
1342 }else{
1343 }
1344 }
1345 }
1346
1347 txdone:
1348 if (info->xmit_cnt < WAKEUP_CHARS) {
1349 cy_sched_event(info, Cy_EVENT_WRITE_WAKEUP);
1350 }
1351 txend:
1352 /* end of service */
1353 cy_writeb(base_addr+(CyTIR<<index),
1354 (save_xir & 0x3f));
1355 cy_writeb(base_addr+(CyCAR<<index), (save_car));
1356 spin_unlock(&cinfo->card_lock);
1357 }
1358
1359 if (status & CySRModem) { /* modem interrupt */
1360
1361 /* determine the channel & change to that context */
1362 spin_lock(&cinfo->card_lock);
1363 save_xir = (u_char) cy_readb(base_addr+(CyMIR<<index));
1364 channel = (u_short ) (save_xir & CyIRChannel);
1365 info = &cy_port[channel + chip * 4
1366 + cinfo->first_line];
1367 info->last_active = jiffies;
1368 save_car = cy_readb(base_addr+(CyCAR<<index));
1369 cy_writeb(base_addr+(CyCAR<<index), save_xir);
1370
1371 mdm_change = cy_readb(base_addr+(CyMISR<<index));
1372 mdm_status = cy_readb(base_addr+(CyMSVR1<<index));
1373
1374 if(info->tty == 0){/* no place for data, ignore it*/
1375 ;
1376 }else{
1377 if (mdm_change & CyANY_DELTA) {
1378 /* For statistics only */
1379 if (mdm_change & CyDCD) info->icount.dcd++;
1380 if (mdm_change & CyCTS) info->icount.cts++;
1381 if (mdm_change & CyDSR) info->icount.dsr++;
1382 if (mdm_change & CyRI) info->icount.rng++;
1383
1384 cy_sched_event(info, Cy_EVENT_DELTA_WAKEUP);
1385 }
1386
1387 if((mdm_change & CyDCD)
1388 && (info->flags & ASYNC_CHECK_CD)){
1389 if(mdm_status & CyDCD){
1390 cy_sched_event(info,
1391 Cy_EVENT_OPEN_WAKEUP);
1392 }else{
1393 cy_sched_event(info,
1394 Cy_EVENT_HANGUP);
1395 }
1396 }
1397 if((mdm_change & CyCTS)
1398 && (info->flags & ASYNC_CTS_FLOW)){
1399 if(info->tty->hw_stopped){
1400 if(mdm_status & CyCTS){
1401 /* cy_start isn't used
1402 because... !!! */
1403 info->tty->hw_stopped = 0;
1404 cy_writeb(base_addr+(CySRER<<index),
1405 cy_readb(base_addr+(CySRER<<index)) |
1406 CyTxRdy);
1407 cy_sched_event(info,
1408 Cy_EVENT_WRITE_WAKEUP);
1409 }
1410 }else{
1411 if(!(mdm_status & CyCTS)){
1412 /* cy_stop isn't used
1413 because ... !!! */
1414 info->tty->hw_stopped = 1;
1415 cy_writeb(base_addr+(CySRER<<index),
1416 cy_readb(base_addr+(CySRER<<index)) &
1417 ~CyTxRdy);
1418 }
1419 }
1420 }
1421 if(mdm_change & CyDSR){
1422 }
1423 if(mdm_change & CyRI){
1424 }
1425 }
1426 /* end of service */
1427 cy_writeb(base_addr+(CyMIR<<index),
1428 (save_xir & 0x3f));
1429 cy_writeb(base_addr+(CyCAR<<index), save_car);
1430 spin_unlock(&cinfo->card_lock);
1431 }
1432 } /* end while status != 0 */
1433 } /* end loop for chips... */
1434 } while(had_work);
1435
1436 /* clear interrupts */
1437 spin_lock(&cinfo->card_lock);
1438 cy_writeb(card_base_addr + (Cy_ClrIntr<<index), 0);
1439 /* Cy_ClrIntr is 0x1800 */
1440 spin_unlock(&cinfo->card_lock);
1441 return IRQ_HANDLED;
1442 } /* cyy_interrupt */
1443
1444 /***********************************************************/
1445 /********* End of block of Cyclom-Y specific code **********/
1446 /******** Start of block of Cyclades-Z specific code *********/
1447 /***********************************************************/
1448
1449 static int
1450 cyz_fetch_msg( struct cyclades_card *cinfo,
1451 uclong *channel, ucchar *cmd, uclong *param)
1452 {
1453 struct FIRM_ID __iomem *firm_id;
1454 struct ZFW_CTRL __iomem *zfw_ctrl;
1455 struct BOARD_CTRL __iomem *board_ctrl;
1456 unsigned long loc_doorbell;
1457
1458 firm_id = cinfo->base_addr + ID_ADDRESS;
1459 if (!ISZLOADED(*cinfo)){
1460 return (-1);
1461 }
1462 zfw_ctrl = cinfo->base_addr + (cy_readl(&firm_id->zfwctrl_addr) & 0xfffff);
1463 board_ctrl = &zfw_ctrl->board_ctrl;
1464
1465 loc_doorbell = cy_readl(&((struct RUNTIME_9060 __iomem *)
1466 (cinfo->ctl_addr))->loc_doorbell);
1467 if (loc_doorbell){
1468 *cmd = (char)(0xff & loc_doorbell);
1469 *channel = cy_readl(&board_ctrl->fwcmd_channel);
1470 *param = (uclong)cy_readl(&board_ctrl->fwcmd_param);
1471 cy_writel(&((struct RUNTIME_9060 __iomem *)(cinfo->ctl_addr))->loc_doorbell,
1472 0xffffffff);
1473 return 1;
1474 }
1475 return 0;
1476 } /* cyz_fetch_msg */
1477
1478 static int
1479 cyz_issue_cmd( struct cyclades_card *cinfo,
1480 uclong channel, ucchar cmd, uclong param)
1481 {
1482 struct FIRM_ID __iomem *firm_id;
1483 struct ZFW_CTRL __iomem *zfw_ctrl;
1484 struct BOARD_CTRL __iomem *board_ctrl;
1485 unsigned long __iomem *pci_doorbell;
1486 int index;
1487
1488 firm_id = cinfo->base_addr + ID_ADDRESS;
1489 if (!ISZLOADED(*cinfo)){
1490 return (-1);
1491 }
1492 zfw_ctrl = cinfo->base_addr + (cy_readl(&firm_id->zfwctrl_addr) & 0xfffff);
1493 board_ctrl = &zfw_ctrl->board_ctrl;
1494
1495 index = 0;
1496 pci_doorbell = &((struct RUNTIME_9060 __iomem *) (cinfo->ctl_addr))->pci_doorbell;
1497 while( (cy_readl(pci_doorbell) & 0xff) != 0){
1498 if (index++ == 1000){
1499 return((int)(cy_readl(pci_doorbell) & 0xff));
1500 }
1501 udelay(50L);
1502 }
1503 cy_writel(&board_ctrl->hcmd_channel, channel);
1504 cy_writel(&board_ctrl->hcmd_param , param);
1505 cy_writel(pci_doorbell, (long)cmd);
1506
1507 return(0);
1508 } /* cyz_issue_cmd */
1509
1510 static void
1511 cyz_handle_rx(struct cyclades_port *info,
1512 volatile struct CH_CTRL __iomem *ch_ctrl,
1513 volatile struct BUF_CTRL __iomem *buf_ctrl)
1514 {
1515 struct cyclades_card *cinfo = &cy_card[info->card];
1516 struct tty_struct *tty = info->tty;
1517 volatile int char_count;
1518 int len;
1519 #ifdef BLOCKMOVE
1520 int small_count;
1521 #else
1522 char data;
1523 #endif
1524 volatile uclong rx_put, rx_get, new_rx_get, rx_bufsize, rx_bufaddr;
1525
1526 rx_get = new_rx_get = cy_readl(&buf_ctrl->rx_get);
1527 rx_put = cy_readl(&buf_ctrl->rx_put);
1528 rx_bufsize = cy_readl(&buf_ctrl->rx_bufsize);
1529 rx_bufaddr = cy_readl(&buf_ctrl->rx_bufaddr);
1530 if (rx_put >= rx_get)
1531 char_count = rx_put - rx_get;
1532 else
1533 char_count = rx_put - rx_get + rx_bufsize;
1534
1535 if ( char_count ) {
1536 info->last_active = jiffies;
1537 info->jiffies[1] = jiffies;
1538
1539 #ifdef CY_ENABLE_MONITORING
1540 info->mon.int_count++;
1541 info->mon.char_count += char_count;
1542 if (char_count > info->mon.char_max)
1543 info->mon.char_max = char_count;
1544 info->mon.char_last = char_count;
1545 #endif
1546 if(tty == 0){
1547 /* flush received characters */
1548 new_rx_get = (new_rx_get + char_count) & (rx_bufsize - 1);
1549 info->rflush_count++;
1550 }else{
1551 #ifdef BLOCKMOVE
1552 /* we'd like to use memcpy(t, f, n) and memset(s, c, count)
1553 for performance, but because of buffer boundaries, there
1554 may be several steps to the operation */
1555 while(0 < (small_count =
1556 min_t(unsigned int, (rx_bufsize - new_rx_get),
1557 min_t(unsigned int, (TTY_FLIPBUF_SIZE - tty->flip.count), char_count))
1558 )) {
1559 memcpy_fromio(tty->flip.char_buf_ptr,
1560 (char *)(cinfo->base_addr
1561 + rx_bufaddr + new_rx_get),
1562 small_count);
1563
1564 tty->flip.char_buf_ptr += small_count;
1565 memset(tty->flip.flag_buf_ptr, TTY_NORMAL, small_count);
1566 tty->flip.flag_buf_ptr += small_count;
1567 new_rx_get = (new_rx_get + small_count) & (rx_bufsize - 1);
1568 char_count -= small_count;
1569 info->icount.rx += small_count;
1570 info->idle_stats.recv_bytes += small_count;
1571 tty->flip.count += small_count;
1572 }
1573 #else
1574 len = tty_buffer_request_room(tty, char_count);
1575 while(len--){
1576 data = cy_readb(cinfo->base_addr + rx_bufaddr + new_rx_get);
1577 new_rx_get = (new_rx_get + 1) & (rx_bufsize - 1);
1578 tty_insert_flip_char(tty, data, TTY_NORMAL);
1579 info->idle_stats.recv_bytes++;
1580 info->icount.rx++;
1581 }
1582 #endif
1583 #ifdef CONFIG_CYZ_INTR
1584 /* Recalculate the number of chars in the RX buffer and issue
1585 a cmd in case it's higher than the RX high water mark */
1586 rx_put = cy_readl(&buf_ctrl->rx_put);
1587 if (rx_put >= rx_get)
1588 char_count = rx_put - rx_get;
1589 else
1590 char_count = rx_put - rx_get + rx_bufsize;
1591 if(char_count >= cy_readl(&buf_ctrl->rx_threshold)) {
1592 cy_sched_event(info, Cy_EVENT_Z_RX_FULL);
1593 }
1594 #endif
1595 info->idle_stats.recv_idle = jiffies;
1596 tty_schedule_flip(tty);
1597 }
1598 /* Update rx_get */
1599 cy_writel(&buf_ctrl->rx_get, new_rx_get);
1600 }
1601 }
1602
1603 static void
1604 cyz_handle_tx(struct cyclades_port *info,
1605 volatile struct CH_CTRL __iomem *ch_ctrl,
1606 volatile struct BUF_CTRL __iomem *buf_ctrl)
1607 {
1608 struct cyclades_card *cinfo = &cy_card[info->card];
1609 struct tty_struct *tty = info->tty;
1610 char data;
1611 volatile int char_count;
1612 #ifdef BLOCKMOVE
1613 int small_count;
1614 #endif
1615 volatile uclong tx_put, tx_get, tx_bufsize, tx_bufaddr;
1616
1617 if (info->xmit_cnt <= 0) /* Nothing to transmit */
1618 return;
1619
1620 tx_get = cy_readl(&buf_ctrl->tx_get);
1621 tx_put = cy_readl(&buf_ctrl->tx_put);
1622 tx_bufsize = cy_readl(&buf_ctrl->tx_bufsize);
1623 tx_bufaddr = cy_readl(&buf_ctrl->tx_bufaddr);
1624 if (tx_put >= tx_get)
1625 char_count = tx_get - tx_put - 1 + tx_bufsize;
1626 else
1627 char_count = tx_get - tx_put - 1;
1628
1629 if ( char_count ) {
1630
1631 if( tty == 0 ){
1632 goto ztxdone;
1633 }
1634
1635 if(info->x_char) { /* send special char */
1636 data = info->x_char;
1637
1638 cy_writeb((cinfo->base_addr + tx_bufaddr + tx_put), data);
1639 tx_put = (tx_put + 1) & (tx_bufsize - 1);
1640 info->x_char = 0;
1641 char_count--;
1642 info->icount.tx++;
1643 info->last_active = jiffies;
1644 info->jiffies[2] = jiffies;
1645 }
1646 #ifdef BLOCKMOVE
1647 while(0 < (small_count =
1648 min_t(unsigned int, (tx_bufsize - tx_put),
1649 min_t(unsigned int, (SERIAL_XMIT_SIZE - info->xmit_tail),
1650 min_t(unsigned int, info->xmit_cnt, char_count))))) {
1651
1652 memcpy_toio((char *)(cinfo->base_addr + tx_bufaddr + tx_put),
1653 &info->xmit_buf[info->xmit_tail],
1654 small_count);
1655
1656 tx_put = (tx_put + small_count) & (tx_bufsize - 1);
1657 char_count -= small_count;
1658 info->icount.tx += small_count;
1659 info->xmit_cnt -= small_count;
1660 info->xmit_tail =
1661 (info->xmit_tail + small_count) & (SERIAL_XMIT_SIZE - 1);
1662 info->last_active = jiffies;
1663 info->jiffies[2] = jiffies;
1664 }
1665 #else
1666 while (info->xmit_cnt && char_count){
1667 data = info->xmit_buf[info->xmit_tail];
1668 info->xmit_cnt--;
1669 info->xmit_tail = (info->xmit_tail + 1) & (SERIAL_XMIT_SIZE - 1);
1670
1671 cy_writeb(cinfo->base_addr + tx_bufaddr + tx_put, data);
1672 tx_put = (tx_put + 1) & (tx_bufsize - 1);
1673 char_count--;
1674 info->icount.tx++;
1675 info->last_active = jiffies;
1676 info->jiffies[2] = jiffies;
1677 }
1678 #endif
1679 ztxdone:
1680 if (info->xmit_cnt < WAKEUP_CHARS) {
1681 cy_sched_event(info, Cy_EVENT_WRITE_WAKEUP);
1682 }
1683 /* Update tx_put */
1684 cy_writel(&buf_ctrl->tx_put, tx_put);
1685 }
1686 }
1687
1688 static void
1689 cyz_handle_cmd(struct cyclades_card *cinfo)
1690 {
1691 struct tty_struct *tty;
1692 struct cyclades_port *info;
1693 static volatile struct FIRM_ID __iomem *firm_id;
1694 static volatile struct ZFW_CTRL __iomem *zfw_ctrl;
1695 static volatile struct BOARD_CTRL __iomem *board_ctrl;
1696 static volatile struct CH_CTRL __iomem *ch_ctrl;
1697 static volatile struct BUF_CTRL __iomem *buf_ctrl;
1698 uclong channel;
1699 ucchar cmd;
1700 uclong param;
1701 uclong hw_ver, fw_ver;
1702 int special_count;
1703 int delta_count;
1704
1705 firm_id = cinfo->base_addr + ID_ADDRESS;
1706 zfw_ctrl = cinfo->base_addr + (cy_readl(&firm_id->zfwctrl_addr) & 0xfffff);
1707 board_ctrl = &zfw_ctrl->board_ctrl;
1708 fw_ver = cy_readl(&board_ctrl->fw_version);
1709 hw_ver = cy_readl(&((struct RUNTIME_9060 __iomem *)(cinfo->ctl_addr))->mail_box_0);
1710
1711
1712 while(cyz_fetch_msg(cinfo, &channel, &cmd, &param) == 1) {
1713 special_count = 0;
1714 delta_count = 0;
1715 info = &cy_port[channel + cinfo->first_line];
1716 if((tty = info->tty) == 0) {
1717 continue;
1718 }
1719 ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]);
1720 buf_ctrl = &(zfw_ctrl->buf_ctrl[channel]);
1721
1722 switch(cmd) {
1723 case C_CM_PR_ERROR:
1724 tty_insert_flip_char(tty, 0, TTY_PARITY);
1725 info->icount.rx++;
1726 special_count++;
1727 break;
1728 case C_CM_FR_ERROR:
1729 tty_insert_flip_char(tty, 0, TTY_FRAME);
1730 info->icount.rx++;
1731 special_count++;
1732 break;
1733 case C_CM_RXBRK:
1734 tty_insert_flip_char(tty, 0, TTY_BREAK);
1735 info->icount.rx++;
1736 special_count++;
1737 break;
1738 case C_CM_MDCD:
1739 info->icount.dcd++;
1740 delta_count++;
1741 if (info->flags & ASYNC_CHECK_CD){
1742 if ((fw_ver > 241 ?
1743 ((u_long)param) :
1744 cy_readl(&ch_ctrl->rs_status)) & C_RS_DCD) {
1745 cy_sched_event(info, Cy_EVENT_OPEN_WAKEUP);
1746 }else{
1747 cy_sched_event(info, Cy_EVENT_HANGUP);
1748 }
1749 }
1750 break;
1751 case C_CM_MCTS:
1752 info->icount.cts++;
1753 delta_count++;
1754 break;
1755 case C_CM_MRI:
1756 info->icount.rng++;
1757 delta_count++;
1758 break;
1759 case C_CM_MDSR:
1760 info->icount.dsr++;
1761 delta_count++;
1762 break;
1763 #ifdef Z_WAKE
1764 case C_CM_IOCTLW:
1765 cy_sched_event(info, Cy_EVENT_SHUTDOWN_WAKEUP);
1766 break;
1767 #endif
1768 #ifdef CONFIG_CYZ_INTR
1769 case C_CM_RXHIWM:
1770 case C_CM_RXNNDT:
1771 case C_CM_INTBACK2:
1772 /* Reception Interrupt */
1773 #ifdef CY_DEBUG_INTERRUPTS
1774 printk("cyz_interrupt: rcvd intr, card %d, port %ld\n\r",
1775 info->card, channel);
1776 #endif
1777 cyz_handle_rx(info, ch_ctrl, buf_ctrl);
1778 break;
1779 case C_CM_TXBEMPTY:
1780 case C_CM_TXLOWWM:
1781 case C_CM_INTBACK:
1782 /* Transmission Interrupt */
1783 #ifdef CY_DEBUG_INTERRUPTS
1784 printk("cyz_interrupt: xmit intr, card %d, port %ld\n\r",
1785 info->card, channel);
1786 #endif
1787 cyz_handle_tx(info, ch_ctrl, buf_ctrl);
1788 break;
1789 #endif /* CONFIG_CYZ_INTR */
1790 case C_CM_FATAL:
1791 /* should do something with this !!! */
1792 break;
1793 default:
1794 break;
1795 }
1796 if(delta_count)
1797 cy_sched_event(info, Cy_EVENT_DELTA_WAKEUP);
1798 if(special_count)
1799 tty_schedule_flip(tty);
1800 }
1801 }
1802
1803 #ifdef CONFIG_CYZ_INTR
1804 static irqreturn_t
1805 cyz_interrupt(int irq, void *dev_id)
1806 {
1807 struct cyclades_card *cinfo;
1808
1809 if((cinfo = (struct cyclades_card *)dev_id) == 0){
1810 #ifdef CY_DEBUG_INTERRUPTS
1811 printk("cyz_interrupt: spurious interrupt %d\n\r", irq);
1812 #endif
1813 return IRQ_NONE; /* spurious interrupt */
1814 }
1815
1816 if (!ISZLOADED(*cinfo)) {
1817 #ifdef CY_DEBUG_INTERRUPTS
1818 printk("cyz_interrupt: board not yet loaded (IRQ%d).\n\r", irq);
1819 #endif
1820 return IRQ_NONE;
1821 }
1822
1823 /* Handle the interrupts */
1824 cyz_handle_cmd(cinfo);
1825
1826 return IRQ_HANDLED;
1827 } /* cyz_interrupt */
1828
1829 static void
1830 cyz_rx_restart(unsigned long arg)
1831 {
1832 struct cyclades_port *info = (struct cyclades_port *)arg;
1833 int retval;
1834 int card = info->card;
1835 uclong channel = (info->line) - (cy_card[card].first_line);
1836 unsigned long flags;
1837
1838 CY_LOCK(info, flags);
1839 retval = cyz_issue_cmd(&cy_card[card], channel, C_CM_INTBACK2, 0L);
1840 if (retval != 0){
1841 printk("cyc:cyz_rx_restart retval on ttyC%d was %x\n",
1842 info->line, retval);
1843 }
1844 cyz_rx_full_timer[info->line].function = NULL;
1845 CY_UNLOCK(info, flags);
1846 }
1847
1848 #else /* CONFIG_CYZ_INTR */
1849
1850 static void
1851 cyz_poll(unsigned long arg)
1852 {
1853 struct cyclades_card *cinfo;
1854 struct cyclades_port *info;
1855 struct tty_struct *tty;
1856 static volatile struct FIRM_ID *firm_id;
1857 static volatile struct ZFW_CTRL *zfw_ctrl;
1858 static volatile struct BOARD_CTRL *board_ctrl;
1859 static volatile struct CH_CTRL *ch_ctrl;
1860 static volatile struct BUF_CTRL *buf_ctrl;
1861 int card, port;
1862
1863 cyz_timerlist.expires = jiffies + (HZ);
1864 for (card = 0 ; card < NR_CARDS ; card++){
1865 cinfo = &cy_card[card];
1866
1867 if (!IS_CYC_Z(*cinfo)) continue;
1868 if (!ISZLOADED(*cinfo)) continue;
1869
1870 firm_id = cinfo->base_addr + ID_ADDRESS;
1871 zfw_ctrl = cinfo->base_addr + (cy_readl(&firm_id->zfwctrl_addr) & 0xfffff);
1872 board_ctrl = &(zfw_ctrl->board_ctrl);
1873
1874 /* Skip first polling cycle to avoid racing conditions with the FW */
1875 if (!cinfo->intr_enabled) {
1876 cinfo->nports = (int) cy_readl(&board_ctrl->n_channel);
1877 cinfo->intr_enabled = 1;
1878 continue;
1879 }
1880
1881 cyz_handle_cmd(cinfo);
1882
1883 for (port = 0 ; port < cinfo->nports ; port++) {
1884 info = &cy_port[ port + cinfo->first_line ];
1885 tty = info->tty;
1886 ch_ctrl = &(zfw_ctrl->ch_ctrl[port]);
1887 buf_ctrl = &(zfw_ctrl->buf_ctrl[port]);
1888
1889 if (!info->throttle)
1890 cyz_handle_rx(info, ch_ctrl, buf_ctrl);
1891 cyz_handle_tx(info, ch_ctrl, buf_ctrl);
1892 }
1893 /* poll every 'cyz_polling_cycle' period */
1894 cyz_timerlist.expires = jiffies + cyz_polling_cycle;
1895 }
1896 add_timer(&cyz_timerlist);
1897
1898 return;
1899 } /* cyz_poll */
1900
1901 #endif /* CONFIG_CYZ_INTR */
1902
1903 /********** End of block of Cyclades-Z specific code *********/
1904 /***********************************************************/
1905
1906
1907 /* This is called whenever a port becomes active;
1908 interrupts are enabled and DTR & RTS are turned on.
1909 */
1910 static int
1911 startup(struct cyclades_port * info)
1912 {
1913 unsigned long flags;
1914 int retval = 0;
1915 void __iomem *base_addr;
1916 int card,chip,channel,index;
1917 unsigned long page;
1918
1919 card = info->card;
1920 channel = (info->line) - (cy_card[card].first_line);
1921
1922 page = get_zeroed_page(GFP_KERNEL);
1923 if (!page)
1924 return -ENOMEM;
1925
1926 CY_LOCK(info, flags);
1927
1928 if (info->flags & ASYNC_INITIALIZED){
1929 free_page(page);
1930 goto errout;
1931 }
1932
1933 if (!info->type){
1934 if (info->tty){
1935 set_bit(TTY_IO_ERROR, &info->tty->flags);
1936 }
1937 free_page(page);
1938 goto errout;
1939 }
1940
1941 if (info->xmit_buf)
1942 free_page(page);
1943 else
1944 info->xmit_buf = (unsigned char *) page;
1945
1946 CY_UNLOCK(info, flags);
1947
1948 set_line_char(info);
1949
1950 if (!IS_CYC_Z(cy_card[card])) {
1951 chip = channel>>2;
1952 channel &= 0x03;
1953 index = cy_card[card].bus_index;
1954 base_addr = cy_card[card].base_addr + (cy_chip_offset[chip]<<index);
1955
1956 #ifdef CY_DEBUG_OPEN
1957 printk("cyc startup card %d, chip %d, channel %d, base_addr %lx\n",
1958 card, chip, channel, (long)base_addr);/**/
1959 #endif
1960
1961 CY_LOCK(info, flags);
1962
1963 cy_writeb(base_addr+(CyCAR<<index), (u_char)channel);
1964
1965 cy_writeb(base_addr+(CyRTPR<<index), (info->default_timeout
1966 ? info->default_timeout : 0x02)); /* 10ms rx timeout */
1967
1968 cyy_issue_cmd(base_addr,CyCHAN_CTL|CyENB_RCVR|CyENB_XMTR,index);
1969
1970 cy_writeb(base_addr+(CyCAR<<index), (u_char)channel);
1971 cy_writeb(base_addr+(CyMSVR1<<index), CyRTS);
1972 cy_writeb(base_addr+(CyMSVR2<<index), CyDTR);
1973
1974 #ifdef CY_DEBUG_DTR
1975 printk("cyc:startup raising DTR\n");
1976 printk(" status: 0x%x, 0x%x\n",
1977 cy_readb(base_addr+(CyMSVR1<<index)),
1978 cy_readb(base_addr+(CyMSVR2<<index)));
1979 #endif
1980
1981 cy_writeb(base_addr+(CySRER<<index),
1982 cy_readb(base_addr+(CySRER<<index)) | CyRxData);
1983 info->flags |= ASYNC_INITIALIZED;
1984
1985 if (info->tty){
1986 clear_bit(TTY_IO_ERROR, &info->tty->flags);
1987 }
1988 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
1989 info->breakon = info->breakoff = 0;
1990 memset((char *)&info->idle_stats, 0, sizeof(info->idle_stats));
1991 info->idle_stats.in_use =
1992 info->idle_stats.recv_idle =
1993 info->idle_stats.xmit_idle = jiffies;
1994
1995 CY_UNLOCK(info, flags);
1996
1997 } else {
1998 struct FIRM_ID __iomem *firm_id;
1999 struct ZFW_CTRL __iomem *zfw_ctrl;
2000 struct BOARD_CTRL __iomem *board_ctrl;
2001 struct CH_CTRL __iomem *ch_ctrl;
2002 int retval;
2003
2004 base_addr = cy_card[card].base_addr;
2005
2006 firm_id = base_addr + ID_ADDRESS;
2007 if (!ISZLOADED(cy_card[card])){
2008 return -ENODEV;
2009 }
2010
2011 zfw_ctrl = cy_card[card].base_addr + (cy_readl(&firm_id->zfwctrl_addr) & 0xfffff);
2012 board_ctrl = &zfw_ctrl->board_ctrl;
2013 ch_ctrl = zfw_ctrl->ch_ctrl;
2014
2015 #ifdef CY_DEBUG_OPEN
2016 printk("cyc startup Z card %d, channel %d, base_addr %lx\n",
2017 card, channel, (long)base_addr);/**/
2018 #endif
2019
2020 CY_LOCK(info, flags);
2021
2022 cy_writel(&ch_ctrl[channel].op_mode, C_CH_ENABLE);
2023 #ifdef Z_WAKE
2024 #ifdef CONFIG_CYZ_INTR
2025 cy_writel(&ch_ctrl[channel].intr_enable,
2026 C_IN_TXBEMPTY|C_IN_TXLOWWM|C_IN_RXHIWM|C_IN_RXNNDT|
2027 C_IN_IOCTLW|
2028 C_IN_MDCD);
2029 #else
2030 cy_writel(&ch_ctrl[channel].intr_enable,
2031 C_IN_IOCTLW|
2032 C_IN_MDCD);
2033 #endif /* CONFIG_CYZ_INTR */
2034 #else
2035 #ifdef CONFIG_CYZ_INTR
2036 cy_writel(&ch_ctrl[channel].intr_enable,
2037 C_IN_TXBEMPTY|C_IN_TXLOWWM|C_IN_RXHIWM|C_IN_RXNNDT|
2038 C_IN_MDCD);
2039 #else
2040 cy_writel(&ch_ctrl[channel].intr_enable,
2041 C_IN_MDCD);
2042 #endif /* CONFIG_CYZ_INTR */
2043 #endif /* Z_WAKE */
2044
2045 retval = cyz_issue_cmd(&cy_card[card], channel, C_CM_IOCTL, 0L);
2046 if (retval != 0){
2047 printk("cyc:startup(1) retval on ttyC%d was %x\n",
2048 info->line, retval);
2049 }
2050
2051 /* Flush RX buffers before raising DTR and RTS */
2052 retval = cyz_issue_cmd(&cy_card[card], channel, C_CM_FLUSH_RX, 0L);
2053 if (retval != 0){
2054 printk("cyc:startup(2) retval on ttyC%d was %x\n",
2055 info->line, retval);
2056 }
2057
2058 /* set timeout !!! */
2059 /* set RTS and DTR !!! */
2060 cy_writel(&ch_ctrl[channel].rs_control,
2061 cy_readl(&ch_ctrl[channel].rs_control) | C_RS_RTS | C_RS_DTR) ;
2062 retval = cyz_issue_cmd(&cy_card[info->card],
2063 channel, C_CM_IOCTLM, 0L);
2064 if (retval != 0){
2065 printk("cyc:startup(3) retval on ttyC%d was %x\n",
2066 info->line, retval);
2067 }
2068 #ifdef CY_DEBUG_DTR
2069 printk("cyc:startup raising Z DTR\n");
2070 #endif
2071
2072 /* enable send, recv, modem !!! */
2073
2074 info->flags |= ASYNC_INITIALIZED;
2075 if (info->tty){
2076 clear_bit(TTY_IO_ERROR, &info->tty->flags);
2077 }
2078 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
2079 info->breakon = info->breakoff = 0;
2080 memset((char *)&info->idle_stats, 0, sizeof(info->idle_stats));
2081 info->idle_stats.in_use =
2082 info->idle_stats.recv_idle =
2083 info->idle_stats.xmit_idle = jiffies;
2084
2085 CY_UNLOCK(info, flags);
2086 }
2087
2088 #ifdef CY_DEBUG_OPEN
2089 printk(" cyc startup done\n");
2090 #endif
2091 return 0;
2092
2093 errout:
2094 CY_UNLOCK(info, flags);
2095 return retval;
2096 } /* startup */
2097
2098
2099 static void
2100 start_xmit( struct cyclades_port *info )
2101 {
2102 unsigned long flags;
2103 void __iomem *base_addr;
2104 int card,chip,channel,index;
2105
2106 card = info->card;
2107 channel = (info->line) - (cy_card[card].first_line);
2108 if (!IS_CYC_Z(cy_card[card])) {
2109 chip = channel>>2;
2110 channel &= 0x03;
2111 index = cy_card[card].bus_index;
2112 base_addr = cy_card[card].base_addr + (cy_chip_offset[chip]<<index);
2113
2114 CY_LOCK(info, flags);
2115 cy_writeb(base_addr+(CyCAR<<index), channel);
2116 cy_writeb(base_addr+(CySRER<<index),
2117 cy_readb(base_addr+(CySRER<<index)) | CyTxRdy);
2118 CY_UNLOCK(info, flags);
2119 } else {
2120 #ifdef CONFIG_CYZ_INTR
2121 int retval;
2122
2123 CY_LOCK(info, flags);
2124 retval = cyz_issue_cmd(&cy_card[card], channel, C_CM_INTBACK, 0L);
2125 if (retval != 0){
2126 printk("cyc:start_xmit retval on ttyC%d was %x\n",
2127 info->line, retval);
2128 }
2129 CY_UNLOCK(info, flags);
2130 #else /* CONFIG_CYZ_INTR */
2131 /* Don't have to do anything at this time */
2132 #endif /* CONFIG_CYZ_INTR */
2133 }
2134 } /* start_xmit */
2135
2136 /*
2137 * This routine shuts down a serial port; interrupts are disabled,
2138 * and DTR is dropped if the hangup on close termio flag is on.
2139 */
2140 static void
2141 shutdown(struct cyclades_port * info)
2142 {
2143 unsigned long flags;
2144 void __iomem *base_addr;
2145 int card,chip,channel,index;
2146
2147 if (!(info->flags & ASYNC_INITIALIZED)){
2148 return;
2149 }
2150
2151 card = info->card;
2152 channel = info->line - cy_card[card].first_line;
2153 if (!IS_CYC_Z(cy_card[card])) {
2154 chip = channel>>2;
2155 channel &= 0x03;
2156 index = cy_card[card].bus_index;
2157 base_addr = cy_card[card].base_addr + (cy_chip_offset[chip]<<index);
2158
2159 #ifdef CY_DEBUG_OPEN
2160 printk("cyc shutdown Y card %d, chip %d, channel %d, base_addr %lx\n",
2161 card, chip, channel, (long)base_addr);
2162 #endif
2163
2164 CY_LOCK(info, flags);
2165
2166 /* Clear delta_msr_wait queue to avoid mem leaks. */
2167 wake_up_interruptible(&info->delta_msr_wait);
2168
2169 if (info->xmit_buf){
2170 unsigned char * temp;
2171 temp = info->xmit_buf;
2172 info->xmit_buf = NULL;
2173 free_page((unsigned long) temp);
2174 }
2175 cy_writeb(base_addr+(CyCAR<<index), (u_char)channel);
2176 if (!info->tty || (info->tty->termios->c_cflag & HUPCL)) {
2177 cy_writeb(base_addr+(CyMSVR1<<index), ~CyRTS);
2178 cy_writeb(base_addr+(CyMSVR2<<index), ~CyDTR);
2179 #ifdef CY_DEBUG_DTR
2180 printk("cyc shutdown dropping DTR\n");
2181 printk(" status: 0x%x, 0x%x\n",
2182 cy_readb(base_addr+(CyMSVR1<<index)),
2183 cy_readb(base_addr+(CyMSVR2<<index)));
2184 #endif
2185 }
2186 cyy_issue_cmd(base_addr,CyCHAN_CTL|CyDIS_RCVR,index);
2187 /* it may be appropriate to clear _XMIT at
2188 some later date (after testing)!!! */
2189
2190 if (info->tty){
2191 set_bit(TTY_IO_ERROR, &info->tty->flags);
2192 }
2193 info->flags &= ~ASYNC_INITIALIZED;
2194 CY_UNLOCK(info, flags);
2195 } else {
2196 struct FIRM_ID __iomem *firm_id;
2197 struct ZFW_CTRL __iomem *zfw_ctrl;
2198 struct BOARD_CTRL __iomem *board_ctrl;
2199 struct CH_CTRL __iomem *ch_ctrl;
2200 int retval;
2201
2202 base_addr = cy_card[card].base_addr;
2203 #ifdef CY_DEBUG_OPEN
2204 printk("cyc shutdown Z card %d, channel %d, base_addr %lx\n",
2205 card, channel, (long)base_addr);
2206 #endif
2207
2208 firm_id = base_addr + ID_ADDRESS;
2209 if (!ISZLOADED(cy_card[card])) {
2210 return;
2211 }
2212
2213 zfw_ctrl = cy_card[card].base_addr + (cy_readl(&firm_id->zfwctrl_addr) & 0xfffff);
2214 board_ctrl = &zfw_ctrl->board_ctrl;
2215 ch_ctrl = zfw_ctrl->ch_ctrl;
2216
2217 CY_LOCK(info, flags);
2218
2219 if (info->xmit_buf){
2220 unsigned char * temp;
2221 temp = info->xmit_buf;
2222 info->xmit_buf = NULL;
2223 free_page((unsigned long) temp);
2224 }
2225
2226 if (!info->tty || (info->tty->termios->c_cflag & HUPCL)) {
2227 cy_writel(&ch_ctrl[channel].rs_control,
2228 (uclong)(cy_readl(&ch_ctrl[channel].rs_control) &
2229 ~(C_RS_RTS | C_RS_DTR)));
2230 retval = cyz_issue_cmd(&cy_card[info->card],
2231 channel, C_CM_IOCTLM, 0L);
2232 if (retval != 0){
2233 printk("cyc:shutdown retval on ttyC%d was %x\n",
2234 info->line, retval);
2235 }
2236 #ifdef CY_DEBUG_DTR
2237 printk("cyc:shutdown dropping Z DTR\n");
2238 #endif
2239 }
2240
2241 if (info->tty){
2242 set_bit(TTY_IO_ERROR, &info->tty->flags);
2243 }
2244 info->flags &= ~ASYNC_INITIALIZED;
2245
2246 CY_UNLOCK(info, flags);
2247 }
2248
2249 #ifdef CY_DEBUG_OPEN
2250 printk(" cyc shutdown done\n");
2251 #endif
2252 return;
2253 } /* shutdown */
2254
2255
2256 /*
2257 * ------------------------------------------------------------
2258 * cy_open() and friends
2259 * ------------------------------------------------------------
2260 */
2261
2262 static int
2263 block_til_ready(struct tty_struct *tty, struct file * filp,
2264 struct cyclades_port *info)
2265 {
2266 DECLARE_WAITQUEUE(wait, current);
2267 struct cyclades_card *cinfo;
2268 unsigned long flags;
2269 int chip, channel,index;
2270 int retval;
2271 void __iomem *base_addr;
2272
2273 cinfo = &cy_card[info->card];
2274 channel = info->line - cinfo->first_line;
2275
2276 /*
2277 * If the device is in the middle of being closed, then block
2278 * until it's done, and then try again.
2279 */
2280 if (tty_hung_up_p(filp) || (info->flags & ASYNC_CLOSING)) {
2281 if (info->flags & ASYNC_CLOSING) {
2282 interruptible_sleep_on(&info->close_wait);
2283 }
2284 return ((info->flags & ASYNC_HUP_NOTIFY) ? -EAGAIN : -ERESTARTSYS);
2285 }
2286
2287 /*
2288 * If non-blocking mode is set, then make the check up front
2289 * and then exit.
2290 */
2291 if ((filp->f_flags & O_NONBLOCK) ||
2292 (tty->flags & (1 << TTY_IO_ERROR))) {
2293 info->flags |= ASYNC_NORMAL_ACTIVE;
2294 return 0;
2295 }
2296
2297 /*
2298 * Block waiting for the carrier detect and the line to become
2299 * free (i.e., not in use by the callout). While we are in
2300 * this loop, info->count is dropped by one, so that
2301 * cy_close() knows when to free things. We restore it upon
2302 * exit, either normal or abnormal.
2303 */
2304 retval = 0;
2305 add_wait_queue(&info->open_wait, &wait);
2306 #ifdef CY_DEBUG_OPEN
2307 printk("cyc block_til_ready before block: ttyC%d, count = %d\n",
2308 info->line, info->count);/**/
2309 #endif
2310 CY_LOCK(info, flags);
2311 if (!tty_hung_up_p(filp))
2312 info->count--;
2313 CY_UNLOCK(info, flags);
2314 #ifdef CY_DEBUG_COUNT
2315 printk("cyc block_til_ready: (%d): decrementing count to %d\n",
2316 current->pid, info->count);
2317 #endif
2318 info->blocked_open++;
2319
2320 if (!IS_CYC_Z(*cinfo)) {
2321 chip = channel>>2;
2322 channel &= 0x03;
2323 index = cinfo->bus_index;
2324 base_addr = cinfo->base_addr + (cy_chip_offset[chip]<<index);
2325
2326 while (1) {
2327 CY_LOCK(info, flags);
2328 if ((tty->termios->c_cflag & CBAUD)){
2329 cy_writeb(base_addr+(CyCAR<<index), (u_char)channel);
2330 cy_writeb(base_addr+(CyMSVR1<<index), CyRTS);
2331 cy_writeb(base_addr+(CyMSVR2<<index), CyDTR);
2332 #ifdef CY_DEBUG_DTR
2333 printk("cyc:block_til_ready raising DTR\n");
2334 printk(" status: 0x%x, 0x%x\n",
2335 cy_readb(base_addr+(CyMSVR1<<index)),
2336 cy_readb(base_addr+(CyMSVR2<<index)));
2337 #endif
2338 }
2339 CY_UNLOCK(info, flags);
2340
2341 set_current_state(TASK_INTERRUPTIBLE);
2342 if (tty_hung_up_p(filp)
2343 || !(info->flags & ASYNC_INITIALIZED) ){
2344 retval = ((info->flags & ASYNC_HUP_NOTIFY) ?
2345 -EAGAIN : -ERESTARTSYS);
2346 break;
2347 }
2348
2349 CY_LOCK(info, flags);
2350 cy_writeb(base_addr+(CyCAR<<index), (u_char)channel);
2351 if (!(info->flags & ASYNC_CLOSING)
2352 && (C_CLOCAL(tty)
2353 || (cy_readb(base_addr+(CyMSVR1<<index)) & CyDCD))) {
2354 CY_UNLOCK(info, flags);
2355 break;
2356 }
2357 CY_UNLOCK(info, flags);
2358
2359 if (signal_pending(current)) {
2360 retval = -ERESTARTSYS;
2361 break;
2362 }
2363 #ifdef CY_DEBUG_OPEN
2364 printk("cyc block_til_ready blocking: ttyC%d, count = %d\n",
2365 info->line, info->count);/**/
2366 #endif
2367 schedule();
2368 }
2369 } else {
2370 struct FIRM_ID __iomem *firm_id;
2371 struct ZFW_CTRL __iomem *zfw_ctrl;
2372 struct BOARD_CTRL __iomem *board_ctrl;
2373 struct CH_CTRL __iomem *ch_ctrl;
2374 int retval;
2375
2376 base_addr = cinfo->base_addr;
2377 firm_id = base_addr + ID_ADDRESS;
2378 if (!ISZLOADED(*cinfo)){
2379 current->state = TASK_RUNNING;
2380 remove_wait_queue(&info->open_wait, &wait);
2381 return -EINVAL;
2382 }
2383
2384 zfw_ctrl = base_addr + (cy_readl(&firm_id->zfwctrl_addr) & 0xfffff);
2385 board_ctrl = &zfw_ctrl->board_ctrl;
2386 ch_ctrl = zfw_ctrl->ch_ctrl;
2387
2388 while (1) {
2389 if ((tty->termios->c_cflag & CBAUD)){
2390 cy_writel(&ch_ctrl[channel].rs_control,
2391 cy_readl(&ch_ctrl[channel].rs_control) |
2392 (C_RS_RTS | C_RS_DTR));
2393 retval = cyz_issue_cmd(&cy_card[info->card],
2394 channel, C_CM_IOCTLM, 0L);
2395 if (retval != 0){
2396 printk("cyc:block_til_ready retval on ttyC%d was %x\n",
2397 info->line, retval);
2398 }
2399 #ifdef CY_DEBUG_DTR
2400 printk("cyc:block_til_ready raising Z DTR\n");
2401 #endif
2402 }
2403
2404 set_current_state(TASK_INTERRUPTIBLE);
2405 if (tty_hung_up_p(filp)
2406 || !(info->flags & ASYNC_INITIALIZED) ){
2407 retval = ((info->flags & ASYNC_HUP_NOTIFY) ?
2408 -EAGAIN : -ERESTARTSYS);
2409 break;
2410 }
2411 if (!(info->flags & ASYNC_CLOSING)
2412 && (C_CLOCAL(tty)
2413 || (cy_readl(&ch_ctrl[channel].rs_status) & C_RS_DCD))) {
2414 break;
2415 }
2416 if (signal_pending(current)) {
2417 retval = -ERESTARTSYS;
2418 break;
2419 }
2420 #ifdef CY_DEBUG_OPEN
2421 printk("cyc block_til_ready blocking: ttyC%d, count = %d\n",
2422 info->line, info->count);/**/
2423 #endif
2424 schedule();
2425 }
2426 }
2427 current->state = TASK_RUNNING;
2428 remove_wait_queue(&info->open_wait, &wait);
2429 if (!tty_hung_up_p(filp)){
2430 info->count++;
2431 #ifdef CY_DEBUG_COUNT
2432 printk("cyc:block_til_ready (%d): incrementing count to %d\n",
2433 current->pid, info->count);
2434 #endif
2435 }
2436 info->blocked_open--;
2437 #ifdef CY_DEBUG_OPEN
2438 printk("cyc:block_til_ready after blocking: ttyC%d, count = %d\n",
2439 info->line, info->count);/**/
2440 #endif
2441 if (retval)
2442 return retval;
2443 info->flags |= ASYNC_NORMAL_ACTIVE;
2444 return 0;
2445 } /* block_til_ready */
2446
2447
2448 /*
2449 * This routine is called whenever a serial port is opened. It
2450 * performs the serial-specific initialization for the tty structure.
2451 */
2452 static int
2453 cy_open(struct tty_struct *tty, struct file * filp)
2454 {
2455 struct cyclades_port *info;
2456 int retval, line;
2457
2458 line = tty->index;
2459 if ((line < 0) || (NR_PORTS <= line)){
2460 return -ENODEV;
2461 }
2462 info = &cy_port[line];
2463 if (info->line < 0){
2464 return -ENODEV;
2465 }
2466
2467 /* If the card's firmware hasn't been loaded,
2468 treat it as absent from the system. This
2469 will make the user pay attention.
2470 */
2471 if (IS_CYC_Z(cy_card[info->card])) {
2472 struct cyclades_card *cinfo = &cy_card[info->card];
2473 struct FIRM_ID __iomem *firm_id = cinfo->base_addr + ID_ADDRESS;
2474
2475 if (!ISZLOADED(*cinfo)) {
2476 if (((ZE_V1 ==cy_readl(&((struct RUNTIME_9060 __iomem *)
2477 (cinfo->ctl_addr))->mail_box_0)) &&
2478 Z_FPGA_CHECK (*cinfo)) &&
2479 (ZFIRM_HLT == cy_readl (&firm_id->signature)))
2480 {
2481 printk ("cyc:Cyclades-Z Error: you need an external power supply for this number of ports.\n\rFirmware halted.\r\n");
2482 } else {
2483 printk("cyc:Cyclades-Z firmware not yet loaded\n");
2484 }
2485 return -ENODEV;
2486 }
2487 #ifdef CONFIG_CYZ_INTR
2488 else {
2489 /* In case this Z board is operating in interrupt mode, its
2490 interrupts should be enabled as soon as the first open happens
2491 to one of its ports. */
2492 if (!cinfo->intr_enabled) {
2493 struct ZFW_CTRL __iomem *zfw_ctrl;
2494 struct BOARD_CTRL __iomem *board_ctrl;
2495
2496 zfw_ctrl = cinfo->base_addr + (cy_readl (&firm_id->zfwctrl_addr) & 0xfffff);
2497
2498 board_ctrl = &zfw_ctrl->board_ctrl;
2499
2500 /* Enable interrupts on the PLX chip */
2501 cy_writew(cinfo->ctl_addr+0x68,
2502 cy_readw(cinfo->ctl_addr+0x68)|0x0900);
2503 /* Enable interrupts on the FW */
2504 retval = cyz_issue_cmd(cinfo,
2505 0, C_CM_IRQ_ENBL, 0L);
2506 if (retval != 0){
2507 printk("cyc:IRQ enable retval was %x\n", retval);
2508 }
2509 cinfo->nports = (int) cy_readl (&board_ctrl->n_channel);
2510 cinfo->intr_enabled = 1;
2511 }
2512 }
2513 #endif /* CONFIG_CYZ_INTR */
2514 /* Make sure this Z port really exists in hardware */
2515 if (info->line > (cinfo->first_line + cinfo->nports - 1))
2516 return -ENODEV;
2517 }
2518 #ifdef CY_DEBUG_OTHER
2519 printk("cyc:cy_open ttyC%d\n", info->line); /* */
2520 #endif
2521 tty->driver_data = info;
2522 info->tty = tty;
2523 if (serial_paranoia_check(info, tty->name, "cy_open")){
2524 return -ENODEV;
2525 }
2526 #ifdef CY_DEBUG_OPEN
2527 printk("cyc:cy_open ttyC%d, count = %d\n",
2528 info->line, info->count);/**/
2529 #endif
2530 info->count++;
2531 #ifdef CY_DEBUG_COUNT
2532 printk("cyc:cy_open (%d): incrementing count to %d\n",
2533 current->pid, info->count);
2534 #endif
2535
2536 /*
2537 * If the port is the middle of closing, bail out now
2538 */
2539 if (tty_hung_up_p(filp) || (info->flags & ASYNC_CLOSING)) {
2540 if (info->flags & ASYNC_CLOSING)
2541 interruptible_sleep_on(&info->close_wait);
2542 return ((info->flags & ASYNC_HUP_NOTIFY) ? -EAGAIN : -ERESTARTSYS);
2543 }
2544
2545 /*
2546 * Start up serial port
2547 */
2548 retval = startup(info);
2549 if (retval){
2550 return retval;
2551 }
2552
2553 retval = block_til_ready(tty, filp, info);
2554 if (retval) {
2555 #ifdef CY_DEBUG_OPEN
2556 printk("cyc:cy_open returning after block_til_ready with %d\n",
2557 retval);
2558 #endif
2559 return retval;
2560 }
2561
2562 info->throttle = 0;
2563
2564 #ifdef CY_DEBUG_OPEN
2565 printk(" cyc:cy_open done\n");/**/
2566 #endif
2567
2568 return 0;
2569 } /* cy_open */
2570
2571
2572 /*
2573 * cy_wait_until_sent() --- wait until the transmitter is empty
2574 */
2575 static void
2576 cy_wait_until_sent(struct tty_struct *tty, int timeout)
2577 {
2578 struct cyclades_port * info = (struct cyclades_port *)tty->driver_data;
2579 void __iomem *base_addr;
2580 int card,chip,channel,index;
2581 unsigned long orig_jiffies;
2582 int char_time;
2583
2584 if (serial_paranoia_check(info, tty->name, "cy_wait_until_sent"))
2585 return;
2586
2587 if (info->xmit_fifo_size == 0)
2588 return; /* Just in case.... */
2589
2590
2591 orig_jiffies = jiffies;
2592 /*
2593 * Set the check interval to be 1/5 of the estimated time to
2594 * send a single character, and make it at least 1. The check
2595 * interval should also be less than the timeout.
2596 *
2597 * Note: we have to use pretty tight timings here to satisfy
2598 * the NIST-PCTS.
2599 */
2600 char_time = (info->timeout - HZ/50) / info->xmit_fifo_size;
2601 char_time = char_time / 5;
2602 if (char_time <= 0)
2603 char_time = 1;
2604 if (timeout < 0)
2605 timeout = 0;
2606 if (timeout)
2607 char_time = min(char_time, timeout);
2608 /*
2609 * If the transmitter hasn't cleared in twice the approximate
2610 * amount of time to send the entire FIFO, it probably won't
2611 * ever clear. This assumes the UART isn't doing flow
2612 * control, which is currently the case. Hence, if it ever
2613 * takes longer than info->timeout, this is probably due to a
2614 * UART bug of some kind. So, we clamp the timeout parameter at
2615 * 2*info->timeout.
2616 */
2617 if (!timeout || timeout > 2*info->timeout)
2618 timeout = 2*info->timeout;
2619 #ifdef CY_DEBUG_WAIT_UNTIL_SENT
2620 printk("In cy_wait_until_sent(%d) check=%lu...", timeout, char_time);
2621 printk("jiff=%lu...", jiffies);
2622 #endif
2623 card = info->card;
2624 channel = (info->line) - (cy_card[card].first_line);
2625 if (!IS_CYC_Z(cy_card[card])) {
2626 chip = channel>>2;
2627 channel &= 0x03;
2628 index = cy_card[card].bus_index;
2629 base_addr = cy_card[card].base_addr + (cy_chip_offset[chip]<<index);
2630 while (cy_readb(base_addr+(CySRER<<index)) & CyTxRdy) {
2631 #ifdef CY_DEBUG_WAIT_UNTIL_SENT
2632 printk("Not clean (jiff=%lu)...", jiffies);
2633 #endif
2634 if (msleep_interruptible(jiffies_to_msecs(char_time)))
2635 break;
2636 if (timeout && time_after(jiffies, orig_jiffies + timeout))
2637 break;
2638 }
2639 } else {
2640 // Nothing to do!
2641 }
2642 /* Run one more char cycle */
2643 msleep_interruptible(jiffies_to_msecs(char_time * 5));
2644 #ifdef CY_DEBUG_WAIT_UNTIL_SENT
2645 printk("Clean (jiff=%lu)...done\n", jiffies);
2646 #endif
2647 }
2648
2649 /*
2650 * This routine is called when a particular tty device is closed.
2651 */
2652 static void
2653 cy_close(struct tty_struct *tty, struct file *filp)
2654 {
2655 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
2656 unsigned long flags;
2657
2658 #ifdef CY_DEBUG_OTHER
2659 printk("cyc:cy_close ttyC%d\n", info->line);
2660 #endif
2661
2662 if (!info || serial_paranoia_check(info, tty->name, "cy_close")){
2663 return;
2664 }
2665
2666 CY_LOCK(info, flags);
2667 /* If the TTY is being hung up, nothing to do */
2668 if (tty_hung_up_p(filp)) {
2669 CY_UNLOCK(info, flags);
2670 return;
2671 }
2672
2673 #ifdef CY_DEBUG_OPEN
2674 printk("cyc:cy_close ttyC%d, count = %d\n", info->line, info->count);
2675 #endif
2676 if ((tty->count == 1) && (info->count != 1)) {
2677 /*
2678 * Uh, oh. tty->count is 1, which means that the tty
2679 * structure will be freed. Info->count should always
2680 * be one in these conditions. If it's greater than
2681 * one, we've got real problems, since it means the
2682 * serial port won't be shutdown.
2683 */
2684 printk("cyc:cy_close: bad serial port count; tty->count is 1, "
2685 "info->count is %d\n", info->count);
2686 info->count = 1;
2687 }
2688 #ifdef CY_DEBUG_COUNT
2689 printk("cyc:cy_close at (%d): decrementing count to %d\n",
2690 current->pid, info->count - 1);
2691 #endif
2692 if (--info->count < 0) {
2693 #ifdef CY_DEBUG_COUNT
2694 printk("cyc:cyc_close setting count to 0\n");
2695 #endif
2696 info->count = 0;
2697 }
2698 if (info->count) {
2699 CY_UNLOCK(info, flags);
2700 return;
2701 }
2702 info->flags |= ASYNC_CLOSING;
2703
2704 /*
2705 * Now we wait for the transmit buffer to clear; and we notify
2706 * the line discipline to only process XON/XOFF characters.
2707 */
2708 tty->closing = 1;
2709 CY_UNLOCK(info, flags);
2710 if (info->closing_wait != CY_CLOSING_WAIT_NONE) {
2711 tty_wait_until_sent(tty, info->closing_wait);
2712 }
2713 CY_LOCK(info, flags);
2714
2715 if (!IS_CYC_Z(cy_card[info->card])) {
2716 int channel = info->line - cy_card[info->card].first_line;
2717 int index = cy_card[info->card].bus_index;
2718 void __iomem *base_addr = cy_card[info->card].base_addr + (cy_chip_offset[channel>>2] << index);
2719 /* Stop accepting input */
2720 channel &= 0x03;
2721 cy_writeb(base_addr+(CyCAR<<index), (u_char)channel);
2722 cy_writeb(base_addr+(CySRER<<index),
2723 cy_readb(base_addr+(CySRER<<index)) & ~CyRxData);
2724 if (info->flags & ASYNC_INITIALIZED) {
2725 /* Waiting for on-board buffers to be empty before closing
2726 the port */
2727 CY_UNLOCK(info, flags);
2728 cy_wait_until_sent(tty, info->timeout);
2729 CY_LOCK(info, flags);
2730 }
2731 } else {
2732 #ifdef Z_WAKE
2733 /* Waiting for on-board buffers to be empty before closing the port */
2734 void __iomem *base_addr = cy_card[info->card].base_addr;
2735 struct FIRM_ID __iomem *firm_id = base_addr + ID_ADDRESS;
2736 struct ZFW_CTRL __iomem *zfw_ctrl = base_addr + (cy_readl(&firm_id->zfwctrl_addr) & 0xfffff);
2737 struct CH_CTRL __iomem *ch_ctrl = zfw_ctrl->ch_ctrl;
2738 int channel = info->line - cy_card[info->card].first_line;
2739 int retval;
2740
2741 if (cy_readl(&ch_ctrl[channel].flow_status) != C_FS_TXIDLE) {
2742 retval = cyz_issue_cmd(&cy_card[info->card], channel,
2743 C_CM_IOCTLW, 0L);
2744 if (retval != 0){
2745 printk("cyc:cy_close retval on ttyC%d was %x\n",
2746 info->line, retval);
2747 }
2748 CY_UNLOCK(info, flags);
2749 interruptible_sleep_on(&info->shutdown_wait);
2750 CY_LOCK(info, flags);
2751 }
2752 #endif
2753 }
2754
2755 CY_UNLOCK(info, flags);
2756 shutdown(info);
2757 if (tty->driver->flush_buffer)
2758 tty->driver->flush_buffer(tty);
2759 tty_ldisc_flush(tty);
2760 CY_LOCK(info, flags);
2761
2762 tty->closing = 0;
2763 info->event = 0;
2764 info->tty = NULL;
2765 if (info->blocked_open) {
2766 CY_UNLOCK(info, flags);
2767 if (info->close_delay) {
2768 msleep_interruptible(jiffies_to_msecs(info->close_delay));
2769 }
2770 wake_up_interruptible(&info->open_wait);
2771 CY_LOCK(info, flags);
2772 }
2773 info->flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING);
2774 wake_up_interruptible(&info->close_wait);
2775
2776 #ifdef CY_DEBUG_OTHER
2777 printk(" cyc:cy_close done\n");
2778 #endif
2779
2780 CY_UNLOCK(info, flags);
2781 return;
2782 } /* cy_close */
2783
2784
2785 /* This routine gets called when tty_write has put something into
2786 * the write_queue. The characters may come from user space or
2787 * kernel space.
2788 *
2789 * This routine will return the number of characters actually
2790 * accepted for writing.
2791 *
2792 * If the port is not already transmitting stuff, start it off by
2793 * enabling interrupts. The interrupt service routine will then
2794 * ensure that the characters are sent.
2795 * If the port is already active, there is no need to kick it.
2796 *
2797 */
2798 static int
2799 cy_write(struct tty_struct * tty, const unsigned char *buf, int count)
2800 {
2801 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
2802 unsigned long flags;
2803 int c, ret = 0;
2804
2805 #ifdef CY_DEBUG_IO
2806 printk("cyc:cy_write ttyC%d\n", info->line); /* */
2807 #endif
2808
2809 if (serial_paranoia_check(info, tty->name, "cy_write")){
2810 return 0;
2811 }
2812
2813 if (!info->xmit_buf)
2814 return 0;
2815
2816 CY_LOCK(info, flags);
2817 while (1) {
2818 c = min(count, min((int)(SERIAL_XMIT_SIZE - info->xmit_cnt - 1),
2819 (int)(SERIAL_XMIT_SIZE - info->xmit_head)));
2820
2821 if (c <= 0)
2822 break;
2823
2824 memcpy(info->xmit_buf + info->xmit_head, buf, c);
2825 info->xmit_head = (info->xmit_head + c) & (SERIAL_XMIT_SIZE-1);
2826 info->xmit_cnt += c;
2827 buf += c;
2828 count -= c;
2829 ret += c;
2830 }
2831 CY_UNLOCK(info, flags);
2832
2833 info->idle_stats.xmit_bytes += ret;
2834 info->idle_stats.xmit_idle = jiffies;
2835
2836 if (info->xmit_cnt && !tty->stopped && !tty->hw_stopped) {
2837 start_xmit(info);
2838 }
2839 return ret;
2840 } /* cy_write */
2841
2842
2843 /*
2844 * This routine is called by the kernel to write a single
2845 * character to the tty device. If the kernel uses this routine,
2846 * it must call the flush_chars() routine (if defined) when it is
2847 * done stuffing characters into the driver. If there is no room
2848 * in the queue, the character is ignored.
2849 */
2850 static void
2851 cy_put_char(struct tty_struct *tty, unsigned char ch)
2852 {
2853 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
2854 unsigned long flags;
2855
2856 #ifdef CY_DEBUG_IO
2857 printk("cyc:cy_put_char ttyC%d\n", info->line);
2858 #endif
2859
2860 if (serial_paranoia_check(info, tty->name, "cy_put_char"))
2861 return;
2862
2863 if (!info->xmit_buf)
2864 return;
2865
2866 CY_LOCK(info, flags);
2867 if (info->xmit_cnt >= SERIAL_XMIT_SIZE - 1) {
2868 CY_UNLOCK(info, flags);
2869 return;
2870 }
2871
2872 info->xmit_buf[info->xmit_head++] = ch;
2873 info->xmit_head &= SERIAL_XMIT_SIZE - 1;
2874 info->xmit_cnt++;
2875 info->idle_stats.xmit_bytes++;
2876 info->idle_stats.xmit_idle = jiffies;
2877 CY_UNLOCK(info, flags);
2878 } /* cy_put_char */
2879
2880
2881 /*
2882 * This routine is called by the kernel after it has written a
2883 * series of characters to the tty device using put_char().
2884 */
2885 static void
2886 cy_flush_chars(struct tty_struct *tty)
2887 {
2888 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
2889
2890 #ifdef CY_DEBUG_IO
2891 printk("cyc:cy_flush_chars ttyC%d\n", info->line); /* */
2892 #endif
2893
2894 if (serial_paranoia_check(info, tty->name, "cy_flush_chars"))
2895 return;
2896
2897 if (info->xmit_cnt <= 0 || tty->stopped
2898 || tty->hw_stopped || !info->xmit_buf)
2899 return;
2900
2901 start_xmit(info);
2902 } /* cy_flush_chars */
2903
2904
2905 /*
2906 * This routine returns the numbers of characters the tty driver
2907 * will accept for queuing to be written. This number is subject
2908 * to change as output buffers get emptied, or if the output flow
2909 * control is activated.
2910 */
2911 static int
2912 cy_write_room(struct tty_struct *tty)
2913 {
2914 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
2915 int ret;
2916
2917 #ifdef CY_DEBUG_IO
2918 printk("cyc:cy_write_room ttyC%d\n", info->line); /* */
2919 #endif
2920
2921 if (serial_paranoia_check(info, tty->name, "cy_write_room"))
2922 return 0;
2923 ret = SERIAL_XMIT_SIZE - info->xmit_cnt - 1;
2924 if (ret < 0)
2925 ret = 0;
2926 return ret;
2927 } /* cy_write_room */
2928
2929
2930 static int
2931 cy_chars_in_buffer(struct tty_struct *tty)
2932 {
2933 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
2934 int card, channel;
2935
2936 if (serial_paranoia_check(info, tty->name, "cy_chars_in_buffer"))
2937 return 0;
2938
2939 card = info->card;
2940 channel = (info->line) - (cy_card[card].first_line);
2941
2942 #ifdef Z_EXT_CHARS_IN_BUFFER
2943 if (!IS_CYC_Z(cy_card[card])) {
2944 #endif /* Z_EXT_CHARS_IN_BUFFER */
2945 #ifdef CY_DEBUG_IO
2946 printk("cyc:cy_chars_in_buffer ttyC%d %d\n",
2947 info->line, info->xmit_cnt); /* */
2948 #endif
2949 return info->xmit_cnt;
2950 #ifdef Z_EXT_CHARS_IN_BUFFER
2951 } else {
2952 static volatile struct FIRM_ID *firm_id;
2953 static volatile struct ZFW_CTRL *zfw_ctrl;
2954 static volatile struct CH_CTRL *ch_ctrl;
2955 static volatile struct BUF_CTRL *buf_ctrl;
2956 int char_count;
2957 volatile uclong tx_put, tx_get, tx_bufsize;
2958
2959 firm_id = cy_card[card].base_addr + ID_ADDRESS;
2960 zfw_ctrl = cy_card[card].base_addr + (cy_readl(&firm_id->zfwctrl_addr) & 0xfffff);
2961 ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]);
2962 buf_ctrl = &(zfw_ctrl->buf_ctrl[channel]);
2963
2964 tx_get = cy_readl(&buf_ctrl->tx_get);
2965 tx_put = cy_readl(&buf_ctrl->tx_put);
2966 tx_bufsize = cy_readl(&buf_ctrl->tx_bufsize);
2967 if (tx_put >= tx_get)
2968 char_count = tx_put - tx_get;
2969 else
2970 char_count = tx_put - tx_get + tx_bufsize;
2971 #ifdef CY_DEBUG_IO
2972 printk("cyc:cy_chars_in_buffer ttyC%d %d\n",
2973 info->line, info->xmit_cnt + char_count); /* */
2974 #endif
2975 return (info->xmit_cnt + char_count);
2976 }
2977 #endif /* Z_EXT_CHARS_IN_BUFFER */
2978 } /* cy_chars_in_buffer */
2979
2980
2981 /*
2982 * ------------------------------------------------------------
2983 * cy_ioctl() and friends
2984 * ------------------------------------------------------------
2985 */
2986
2987 static void
2988 cyy_baud_calc(struct cyclades_port *info, uclong baud)
2989 {
2990 int co, co_val, bpr;
2991 uclong cy_clock = ((info->chip_rev >= CD1400_REV_J) ? 60000000 : 25000000);
2992
2993 if (baud == 0) {
2994 info->tbpr = info->tco = info->rbpr = info->rco = 0;
2995 return;
2996 }
2997
2998 /* determine which prescaler to use */
2999 for (co = 4, co_val = 2048; co; co--, co_val >>= 2) {
3000 if (cy_clock / co_val / baud > 63)
3001 break;
3002 }
3003
3004 bpr = (cy_clock / co_val * 2 / baud + 1) / 2;
3005 if (bpr > 255)
3006 bpr = 255;
3007
3008 info->tbpr = info->rbpr = bpr;
3009 info->tco = info->rco = co;
3010 }
3011
3012 /*
3013 * This routine finds or computes the various line characteristics.
3014 * It used to be called config_setup
3015 */
3016 static void
3017 set_line_char(struct cyclades_port * info)
3018 {
3019 unsigned long flags;
3020 void __iomem *base_addr;
3021 int card,chip,channel,index;
3022 unsigned cflag, iflag;
3023 unsigned short chip_number;
3024 int baud, baud_rate = 0;
3025 int i;
3026
3027
3028 if (!info->tty || !info->tty->termios){
3029 return;
3030 }
3031 if (info->line == -1){
3032 return;
3033 }
3034 cflag = info->tty->termios->c_cflag;
3035 iflag = info->tty->termios->c_iflag;
3036
3037 /*
3038 * Set up the tty->alt_speed kludge
3039 */
3040 if (info->tty) {
3041 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
3042 info->tty->alt_speed = 57600;
3043 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
3044 info->tty->alt_speed = 115200;
3045 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
3046 info->tty->alt_speed = 230400;
3047 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
3048 info->tty->alt_speed = 460800;
3049 }
3050
3051 card = info->card;
3052 channel = (info->line) - (cy_card[card].first_line);
3053 chip_number = channel / 4;
3054
3055 if (!IS_CYC_Z(cy_card[card])) {
3056
3057 index = cy_card[card].bus_index;
3058
3059 /* baud rate */
3060 baud = tty_get_baud_rate(info->tty);
3061 if ((baud == 38400) &&
3062 ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST)) {
3063 if (info->custom_divisor)
3064 baud_rate = info->baud / info->custom_divisor;
3065 else
3066 baud_rate = info->baud;
3067 } else if (baud > CD1400_MAX_SPEED) {
3068 baud = CD1400_MAX_SPEED;
3069 }
3070 /* find the baud index */
3071 for (i = 0; i < 20; i++) {
3072 if (baud == baud_table[i]) {
3073 break;
3074 }
3075 }
3076 if (i == 20) {
3077 i = 19; /* CD1400_MAX_SPEED */
3078 }
3079
3080 if ((baud == 38400) &&
3081 ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST)) {
3082 cyy_baud_calc(info, baud_rate);
3083 } else {
3084 if(info->chip_rev >= CD1400_REV_J) {
3085 /* It is a CD1400 rev. J or later */
3086 info->tbpr = baud_bpr_60[i]; /* Tx BPR */
3087 info->tco = baud_co_60[i]; /* Tx CO */
3088 info->rbpr = baud_bpr_60[i]; /* Rx BPR */
3089 info->rco = baud_co_60[i]; /* Rx CO */
3090 } else {
3091 info->tbpr = baud_bpr_25[i]; /* Tx BPR */
3092 info->tco = baud_co_25[i]; /* Tx CO */
3093 info->rbpr = baud_bpr_25[i]; /* Rx BPR */
3094 info->rco = baud_co_25[i]; /* Rx CO */
3095 }
3096 }
3097 if (baud_table[i] == 134) {
3098 /* get it right for 134.5 baud */
3099 info->timeout = (info->xmit_fifo_size*HZ*30/269) + 2;
3100 } else if ((baud == 38400) &&
3101 ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST)) {
3102 info->timeout = (info->xmit_fifo_size*HZ*15/baud_rate) + 2;
3103 } else if (baud_table[i]) {
3104 info->timeout = (info->xmit_fifo_size*HZ*15/baud_table[i]) + 2;
3105 /* this needs to be propagated into the card info */
3106 } else {
3107 info->timeout = 0;
3108 }
3109 /* By tradition (is it a standard?) a baud rate of zero
3110 implies the line should be/has been closed. A bit
3111 later in this routine such a test is performed. */
3112
3113 /* byte size and parity */
3114 info->cor5 = 0;
3115 info->cor4 = 0;
3116 info->cor3 = (info->default_threshold
3117 ? info->default_threshold
3118 : baud_cor3[i]); /* receive threshold */
3119 info->cor2 = CyETC;
3120 switch(cflag & CSIZE){
3121 case CS5:
3122 info->cor1 = Cy_5_BITS;
3123 break;
3124 case CS6:
3125 info->cor1 = Cy_6_BITS;
3126 break;
3127 case CS7:
3128 info->cor1 = Cy_7_BITS;
3129 break;
3130 case CS8:
3131 info->cor1 = Cy_8_BITS;
3132 break;
3133 }
3134 if(cflag & CSTOPB){
3135 info->cor1 |= Cy_2_STOP;
3136 }
3137 if (cflag & PARENB){
3138 if (cflag & PARODD){
3139 info->cor1 |= CyPARITY_O;
3140 }else{
3141 info->cor1 |= CyPARITY_E;
3142 }
3143 }else{
3144 info->cor1 |= CyPARITY_NONE;
3145 }
3146
3147 /* CTS flow control flag */
3148 if (cflag & CRTSCTS){
3149 info->flags |= ASYNC_CTS_FLOW;
3150 info->cor2 |= CyCtsAE;
3151 }else{
3152 info->flags &= ~ASYNC_CTS_FLOW;
3153 info->cor2 &= ~CyCtsAE;
3154 }
3155 if (cflag & CLOCAL)
3156 info->flags &= ~ASYNC_CHECK_CD;
3157 else
3158 info->flags |= ASYNC_CHECK_CD;
3159
3160 /***********************************************
3161 The hardware option, CyRtsAO, presents RTS when
3162 the chip has characters to send. Since most modems
3163 use RTS as reverse (inbound) flow control, this
3164 option is not used. If inbound flow control is
3165 necessary, DTR can be programmed to provide the
3166 appropriate signals for use with a non-standard
3167 cable. Contact Marcio Saito for details.
3168 ***********************************************/
3169
3170 chip = channel>>2;
3171 channel &= 0x03;
3172 base_addr = cy_card[card].base_addr + (cy_chip_offset[chip]<<index);
3173
3174 CY_LOCK(info, flags);
3175 cy_writeb(base_addr+(CyCAR<<index), (u_char)channel);
3176
3177 /* tx and rx baud rate */
3178
3179 cy_writeb(base_addr+(CyTCOR<<index), info->tco);
3180 cy_writeb(base_addr+(CyTBPR<<index), info->tbpr);
3181 cy_writeb(base_addr+(CyRCOR<<index), info->rco);
3182 cy_writeb(base_addr+(CyRBPR<<index), info->rbpr);
3183
3184 /* set line characteristics according configuration */
3185
3186 cy_writeb(base_addr+(CySCHR1<<index),
3187 START_CHAR(info->tty));
3188 cy_writeb(base_addr+(CySCHR2<<index),
3189 STOP_CHAR(info->tty));
3190 cy_writeb(base_addr+(CyCOR1<<index), info->cor1);
3191 cy_writeb(base_addr+(CyCOR2<<index), info->cor2);
3192 cy_writeb(base_addr+(CyCOR3<<index), info->cor3);
3193 cy_writeb(base_addr+(CyCOR4<<index), info->cor4);
3194 cy_writeb(base_addr+(CyCOR5<<index), info->cor5);
3195
3196 cyy_issue_cmd(base_addr,
3197 CyCOR_CHANGE|CyCOR1ch|CyCOR2ch|CyCOR3ch,index);
3198
3199 cy_writeb(base_addr+(CyCAR<<index),
3200 (u_char)channel); /* !!! Is this needed? */
3201 cy_writeb(base_addr+(CyRTPR<<index), (info->default_timeout
3202 ? info->default_timeout
3203 : 0x02)); /* 10ms rx timeout */
3204
3205 if (C_CLOCAL(info->tty)) {
3206 /* without modem intr */
3207 cy_writeb(base_addr+(CySRER<<index),
3208 cy_readb(base_addr+(CySRER<<index)) | CyMdmCh);
3209 /* act on 1->0 modem transitions */
3210 if ((cflag & CRTSCTS) && info->rflow) {
3211 cy_writeb(base_addr+(CyMCOR1<<index),
3212 (CyCTS|rflow_thr[i]));
3213 } else {
3214 cy_writeb(base_addr+(CyMCOR1<<index), CyCTS);
3215 }
3216 /* act on 0->1 modem transitions */
3217 cy_writeb(base_addr+(CyMCOR2<<index), CyCTS);
3218 } else {
3219 /* without modem intr */
3220 cy_writeb(base_addr+(CySRER<<index),
3221 cy_readb(base_addr+(CySRER<<index)) | CyMdmCh);
3222 /* act on 1->0 modem transitions */
3223 if ((cflag & CRTSCTS) && info->rflow) {
3224 cy_writeb(base_addr+(CyMCOR1<<index),
3225 (CyDSR|CyCTS|CyRI|CyDCD|rflow_thr[i]));
3226 } else {
3227 cy_writeb(base_addr+(CyMCOR1<<index),
3228 CyDSR|CyCTS|CyRI|CyDCD);
3229 }
3230 /* act on 0->1 modem transitions */
3231 cy_writeb(base_addr+(CyMCOR2<<index),
3232 CyDSR|CyCTS|CyRI|CyDCD);
3233 }
3234
3235 if(i == 0){ /* baud rate is zero, turn off line */
3236 if (info->rtsdtr_inv) {
3237 cy_writeb(base_addr+(CyMSVR1<<index), ~CyRTS);
3238 } else {
3239 cy_writeb(base_addr+(CyMSVR2<<index), ~CyDTR);
3240 }
3241 #ifdef CY_DEBUG_DTR
3242 printk("cyc:set_line_char dropping DTR\n");
3243 printk(" status: 0x%x, 0x%x\n",
3244 cy_readb(base_addr+(CyMSVR1<<index)),
3245 cy_readb(base_addr+(CyMSVR2<<index)));
3246 #endif
3247 }else{
3248 if (info->rtsdtr_inv) {
3249 cy_writeb(base_addr+(CyMSVR1<<index), CyRTS);
3250 } else {
3251 cy_writeb(base_addr+(CyMSVR2<<index), CyDTR);
3252 }
3253 #ifdef CY_DEBUG_DTR
3254 printk("cyc:set_line_char raising DTR\n");
3255 printk(" status: 0x%x, 0x%x\n",
3256 cy_readb(base_addr+(CyMSVR1<<index)),
3257 cy_readb(base_addr+(CyMSVR2<<index)));
3258 #endif
3259 }
3260
3261 if (info->tty){
3262 clear_bit(TTY_IO_ERROR, &info->tty->flags);
3263 }
3264 CY_UNLOCK(info, flags);
3265
3266 } else {
3267 struct FIRM_ID __iomem *firm_id;
3268 struct ZFW_CTRL __iomem *zfw_ctrl;
3269 struct BOARD_CTRL __iomem *board_ctrl;
3270 struct CH_CTRL __iomem *ch_ctrl;
3271 struct BUF_CTRL __iomem *buf_ctrl;
3272 uclong sw_flow;
3273 int retval;
3274
3275 firm_id = cy_card[card].base_addr + ID_ADDRESS;
3276 if (!ISZLOADED(cy_card[card])) {
3277 return;
3278 }
3279
3280 zfw_ctrl = cy_card[card].base_addr + (cy_readl(&firm_id->zfwctrl_addr) & 0xfffff);
3281 board_ctrl = &zfw_ctrl->board_ctrl;
3282 ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]);
3283 buf_ctrl = &zfw_ctrl->buf_ctrl[channel];
3284
3285 /* baud rate */
3286 baud = tty_get_baud_rate(info->tty);
3287 if ((baud == 38400) &&
3288 ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST)) {
3289 if (info->custom_divisor)
3290 baud_rate = info->baud / info->custom_divisor;
3291 else
3292 baud_rate = info->baud;
3293 } else if (baud > CYZ_MAX_SPEED) {
3294 baud = CYZ_MAX_SPEED;
3295 }
3296 cy_writel(&ch_ctrl->comm_baud , baud);
3297
3298 if (baud == 134) {
3299 /* get it right for 134.5 baud */
3300 info->timeout = (info->xmit_fifo_size*HZ*30/269) + 2;
3301 } else if ((baud == 38400) &&
3302 ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST)) {
3303 info->timeout = (info->xmit_fifo_size*HZ*15/baud_rate) + 2;
3304 } else if (baud) {
3305 info->timeout = (info->xmit_fifo_size*HZ*15/baud) + 2;
3306 /* this needs to be propagated into the card info */
3307 } else {
3308 info->timeout = 0;
3309 }
3310
3311 /* byte size and parity */
3312 switch(cflag & CSIZE){
3313 case CS5: cy_writel(&ch_ctrl->comm_data_l , C_DL_CS5); break;
3314 case CS6: cy_writel(&ch_ctrl->comm_data_l , C_DL_CS6); break;
3315 case CS7: cy_writel(&ch_ctrl->comm_data_l , C_DL_CS7); break;
3316 case CS8: cy_writel(&ch_ctrl->comm_data_l , C_DL_CS8); break;
3317 }
3318 if(cflag & CSTOPB){
3319 cy_writel(&ch_ctrl->comm_data_l,
3320 cy_readl(&ch_ctrl->comm_data_l) | C_DL_2STOP);
3321 }else{
3322 cy_writel(&ch_ctrl->comm_data_l,
3323 cy_readl(&ch_ctrl->comm_data_l) | C_DL_1STOP);
3324 }
3325 if (cflag & PARENB){
3326 if (cflag & PARODD){
3327 cy_writel(&ch_ctrl->comm_parity , C_PR_ODD);
3328 }else{
3329 cy_writel(&ch_ctrl->comm_parity , C_PR_EVEN);
3330 }
3331 }else{
3332 cy_writel(&ch_ctrl->comm_parity , C_PR_NONE);
3333 }
3334
3335 /* CTS flow control flag */
3336 if (cflag & CRTSCTS){
3337 cy_writel(&ch_ctrl->hw_flow,
3338 cy_readl(&ch_ctrl->hw_flow) | C_RS_CTS | C_RS_RTS);
3339 }else{
3340 cy_writel(&ch_ctrl->hw_flow,
3341 cy_readl(&ch_ctrl->hw_flow) & ~(C_RS_CTS | C_RS_RTS));
3342 }
3343 /* As the HW flow control is done in firmware, the driver doesn't
3344 need to care about it */
3345 info->flags &= ~ASYNC_CTS_FLOW;
3346
3347 /* XON/XOFF/XANY flow control flags */
3348 sw_flow = 0;
3349 if (iflag & IXON){
3350 sw_flow |= C_FL_OXX;
3351 if (iflag & IXANY)
3352 sw_flow |= C_FL_OIXANY;
3353 }
3354 cy_writel(&ch_ctrl->sw_flow, sw_flow);
3355
3356 retval = cyz_issue_cmd(&cy_card[card], channel, C_CM_IOCTL, 0L);
3357 if (retval != 0){
3358 printk("cyc:set_line_char retval on ttyC%d was %x\n",
3359 info->line, retval);
3360 }
3361
3362 /* CD sensitivity */
3363 if (cflag & CLOCAL){
3364 info->flags &= ~ASYNC_CHECK_CD;
3365 }else{
3366 info->flags |= ASYNC_CHECK_CD;
3367 }
3368
3369 if(baud == 0){ /* baud rate is zero, turn off line */
3370 cy_writel(&ch_ctrl->rs_control,
3371 cy_readl(&ch_ctrl->rs_control) & ~C_RS_DTR);
3372 #ifdef CY_DEBUG_DTR
3373 printk("cyc:set_line_char dropping Z DTR\n");
3374 #endif
3375 }else{
3376 cy_writel(&ch_ctrl->rs_control,
3377 cy_readl(&ch_ctrl->rs_control) | C_RS_DTR);
3378 #ifdef CY_DEBUG_DTR
3379 printk("cyc:set_line_char raising Z DTR\n");
3380 #endif
3381 }
3382
3383 retval = cyz_issue_cmd( &cy_card[card], channel, C_CM_IOCTLM, 0L);
3384 if (retval != 0){
3385 printk("cyc:set_line_char(2) retval on ttyC%d was %x\n",
3386 info->line, retval);
3387 }
3388
3389 if (info->tty){
3390 clear_bit(TTY_IO_ERROR, &info->tty->flags);
3391 }
3392 }
3393 } /* set_line_char */
3394
3395
3396 static int
3397 get_serial_info(struct cyclades_port * info,
3398 struct serial_struct __user * retinfo)
3399 {
3400 struct serial_struct tmp;
3401 struct cyclades_card *cinfo = &cy_card[info->card];
3402
3403 if (!retinfo)
3404 return -EFAULT;
3405 memset(&tmp, 0, sizeof(tmp));
3406 tmp.type = info->type;
3407 tmp.line = info->line;
3408 tmp.port = info->card * 0x100 + info->line - cinfo->first_line;
3409 tmp.irq = cinfo->irq;
3410 tmp.flags = info->flags;
3411 tmp.close_delay = info->close_delay;
3412 tmp.baud_base = info->baud;
3413 tmp.custom_divisor = info->custom_divisor;
3414 tmp.hub6 = 0; /*!!!*/
3415 return copy_to_user(retinfo,&tmp,sizeof(*retinfo))?-EFAULT:0;
3416 } /* get_serial_info */
3417
3418
3419 static int
3420 set_serial_info(struct cyclades_port * info,
3421 struct serial_struct __user * new_info)
3422 {
3423 struct serial_struct new_serial;
3424 struct cyclades_port old_info;
3425
3426 if (copy_from_user(&new_serial,new_info,sizeof(new_serial)))
3427 return -EFAULT;
3428 old_info = *info;
3429
3430 if (!capable(CAP_SYS_ADMIN)) {
3431 if ((new_serial.close_delay != info->close_delay) ||
3432 (new_serial.baud_base != info->baud) ||
3433 ((new_serial.flags & ASYNC_FLAGS & ~ASYNC_USR_MASK) !=
3434 (info->flags & ASYNC_FLAGS & ~ASYNC_USR_MASK)))
3435 return -EPERM;
3436 info->flags = ((info->flags & ~ASYNC_USR_MASK) |
3437 (new_serial.flags & ASYNC_USR_MASK));
3438 info->baud = new_serial.baud_base;
3439 info->custom_divisor = new_serial.custom_divisor;
3440 goto check_and_exit;
3441 }
3442
3443
3444 /*
3445 * OK, past this point, all the error checking has been done.
3446 * At this point, we start making changes.....
3447 */
3448
3449 info->baud = new_serial.baud_base;
3450 info->custom_divisor = new_serial.custom_divisor;
3451 info->flags = ((info->flags & ~ASYNC_FLAGS) |
3452 (new_serial.flags & ASYNC_FLAGS));
3453 info->close_delay = new_serial.close_delay * HZ/100;
3454 info->closing_wait = new_serial.closing_wait * HZ/100;
3455
3456 check_and_exit:
3457 if (info->flags & ASYNC_INITIALIZED){
3458 set_line_char(info);
3459 return 0;
3460 }else{
3461 return startup(info);
3462 }
3463 } /* set_serial_info */
3464
3465 /*
3466 * get_lsr_info - get line status register info
3467 *
3468 * Purpose: Let user call ioctl() to get info when the UART physically
3469 * is emptied. On bus types like RS485, the transmitter must
3470 * release the bus after transmitting. This must be done when
3471 * the transmit shift register is empty, not be done when the
3472 * transmit holding register is empty. This functionality
3473 * allows an RS485 driver to be written in user space.
3474 */
3475 static int get_lsr_info(struct cyclades_port *info, unsigned int __user *value)
3476 {
3477 int card, chip, channel, index;
3478 unsigned char status;
3479 unsigned int result;
3480 unsigned long flags;
3481 void __iomem *base_addr;
3482
3483 card = info->card;
3484 channel = (info->line) - (cy_card[card].first_line);
3485 if (!IS_CYC_Z(cy_card[card])) {
3486 chip = channel>>2;
3487 channel &= 0x03;
3488 index = cy_card[card].bus_index;
3489 base_addr = cy_card[card].base_addr + (cy_chip_offset[chip]<<index);
3490
3491 CY_LOCK(info, flags);
3492 status = cy_readb(base_addr+(CySRER<<index)) & (CyTxRdy|CyTxMpty);
3493 CY_UNLOCK(info, flags);
3494 result = (status ? 0 : TIOCSER_TEMT);
3495 } else {
3496 /* Not supported yet */
3497 return -EINVAL;
3498 }
3499 return put_user(result, (unsigned long __user *) value);
3500 }
3501
3502 static int
3503 cy_tiocmget(struct tty_struct *tty, struct file *file)
3504 {
3505 struct cyclades_port * info = (struct cyclades_port *)tty->driver_data;
3506 int card,chip,channel,index;
3507 void __iomem *base_addr;
3508 unsigned long flags;
3509 unsigned char status;
3510 unsigned long lstatus;
3511 unsigned int result;
3512 struct FIRM_ID __iomem *firm_id;
3513 struct ZFW_CTRL __iomem *zfw_ctrl;
3514 struct BOARD_CTRL __iomem *board_ctrl;
3515 struct CH_CTRL __iomem *ch_ctrl;
3516
3517 if (serial_paranoia_check(info, tty->name, __FUNCTION__))
3518 return -ENODEV;
3519
3520 card = info->card;
3521 channel = (info->line) - (cy_card[card].first_line);
3522 if (!IS_CYC_Z(cy_card[card])) {
3523 chip = channel>>2;
3524 channel &= 0x03;
3525 index = cy_card[card].bus_index;
3526 base_addr = cy_card[card].base_addr + (cy_chip_offset[chip]<<index);
3527
3528 CY_LOCK(info, flags);
3529 cy_writeb(base_addr+(CyCAR<<index), (u_char)channel);
3530 status = cy_readb(base_addr+(CyMSVR1<<index));
3531 status |= cy_readb(base_addr+(CyMSVR2<<index));
3532 CY_UNLOCK(info, flags);
3533
3534 if (info->rtsdtr_inv) {
3535 result = ((status & CyRTS) ? TIOCM_DTR : 0)
3536 | ((status & CyDTR) ? TIOCM_RTS : 0);
3537 } else {
3538 result = ((status & CyRTS) ? TIOCM_RTS : 0)
3539 | ((status & CyDTR) ? TIOCM_DTR : 0);
3540 }
3541 result |= ((status & CyDCD) ? TIOCM_CAR : 0)
3542 | ((status & CyRI) ? TIOCM_RNG : 0)
3543 | ((status & CyDSR) ? TIOCM_DSR : 0)
3544 | ((status & CyCTS) ? TIOCM_CTS : 0);
3545 } else {
3546 base_addr = cy_card[card].base_addr;
3547
3548 if (cy_card[card].num_chips != -1){
3549 return -EINVAL;
3550 }
3551
3552 firm_id = cy_card[card].base_addr + ID_ADDRESS;
3553 if (ISZLOADED(cy_card[card])) {
3554 zfw_ctrl = cy_card[card].base_addr + (cy_readl(&firm_id->zfwctrl_addr) & 0xfffff);
3555 board_ctrl = &zfw_ctrl->board_ctrl;
3556 ch_ctrl = zfw_ctrl->ch_ctrl;
3557 lstatus = cy_readl(&ch_ctrl[channel].rs_status);
3558 result = ((lstatus & C_RS_RTS) ? TIOCM_RTS : 0)
3559 | ((lstatus & C_RS_DTR) ? TIOCM_DTR : 0)
3560 | ((lstatus & C_RS_DCD) ? TIOCM_CAR : 0)
3561 | ((lstatus & C_RS_RI) ? TIOCM_RNG : 0)
3562 | ((lstatus & C_RS_DSR) ? TIOCM_DSR : 0)
3563 | ((lstatus & C_RS_CTS) ? TIOCM_CTS : 0);
3564 }else{
3565 result = 0;
3566 return -ENODEV;
3567 }
3568
3569 }
3570 return result;
3571 } /* cy_tiomget */
3572
3573
3574 static int
3575 cy_tiocmset(struct tty_struct *tty, struct file *file,
3576 unsigned int set, unsigned int clear)
3577 {
3578 struct cyclades_port * info = (struct cyclades_port *)tty->driver_data;
3579 int card,chip,channel,index;
3580 void __iomem *base_addr;
3581 unsigned long flags;
3582 struct FIRM_ID __iomem *firm_id;
3583 struct ZFW_CTRL __iomem *zfw_ctrl;
3584 struct BOARD_CTRL __iomem *board_ctrl;
3585 struct CH_CTRL __iomem *ch_ctrl;
3586 int retval;
3587
3588 if (serial_paranoia_check(info, tty->name, __FUNCTION__))
3589 return -ENODEV;
3590
3591 card = info->card;
3592 channel = (info->line) - (cy_card[card].first_line);
3593 if (!IS_CYC_Z(cy_card[card])) {
3594 chip = channel>>2;
3595 channel &= 0x03;
3596 index = cy_card[card].bus_index;
3597 base_addr = cy_card[card].base_addr + (cy_chip_offset[chip]<<index);
3598
3599 if (set & TIOCM_RTS){
3600 CY_LOCK(info, flags);
3601 cy_writeb(base_addr+(CyCAR<<index), (u_char)channel);
3602 if (info->rtsdtr_inv) {
3603 cy_writeb(base_addr+(CyMSVR2<<index), CyDTR);
3604 } else {
3605 cy_writeb(base_addr+(CyMSVR1<<index), CyRTS);
3606 }
3607 CY_UNLOCK(info, flags);
3608 }
3609 if (clear & TIOCM_RTS) {
3610 CY_LOCK(info, flags);
3611 cy_writeb(base_addr+(CyCAR<<index), (u_char)channel);
3612 if (info->rtsdtr_inv) {
3613 cy_writeb(base_addr+(CyMSVR2<<index), ~CyDTR);
3614 } else {
3615 cy_writeb(base_addr+(CyMSVR1<<index), ~CyRTS);
3616 }
3617 CY_UNLOCK(info, flags);
3618 }
3619 if (set & TIOCM_DTR){
3620 CY_LOCK(info, flags);
3621 cy_writeb(base_addr+(CyCAR<<index), (u_char)channel);
3622 if (info->rtsdtr_inv) {
3623 cy_writeb(base_addr+(CyMSVR1<<index), CyRTS);
3624 } else {
3625 cy_writeb(base_addr+(CyMSVR2<<index), CyDTR);
3626 }
3627 #ifdef CY_DEBUG_DTR
3628 printk("cyc:set_modem_info raising DTR\n");
3629 printk(" status: 0x%x, 0x%x\n",
3630 cy_readb(base_addr+(CyMSVR1<<index)),
3631 cy_readb(base_addr+(CyMSVR2<<index)));
3632 #endif
3633 CY_UNLOCK(info, flags);
3634 }
3635 if (clear & TIOCM_DTR) {
3636 CY_LOCK(info, flags);
3637 cy_writeb(base_addr+(CyCAR<<index), (u_char)channel);
3638 if (info->rtsdtr_inv) {
3639 cy_writeb(base_addr+(CyMSVR1<<index), ~CyRTS);
3640 } else {
3641 cy_writeb(base_addr+(CyMSVR2<<index), ~CyDTR);
3642 }
3643
3644 #ifdef CY_DEBUG_DTR
3645 printk("cyc:set_modem_info dropping DTR\n");
3646 printk(" status: 0x%x, 0x%x\n",
3647 cy_readb(base_addr+(CyMSVR1<<index)),
3648 cy_readb(base_addr+(CyMSVR2<<index)));
3649 #endif
3650 CY_UNLOCK(info, flags);
3651 }
3652 } else {
3653 base_addr = cy_card[card].base_addr;
3654
3655 firm_id = cy_card[card].base_addr + ID_ADDRESS;
3656 if (ISZLOADED(cy_card[card])) {
3657 zfw_ctrl = cy_card[card].base_addr + (cy_readl(&firm_id->zfwctrl_addr) & 0xfffff);
3658 board_ctrl = &zfw_ctrl->board_ctrl;
3659 ch_ctrl = zfw_ctrl->ch_ctrl;
3660
3661 if (set & TIOCM_RTS){
3662 CY_LOCK(info, flags);
3663 cy_writel(&ch_ctrl[channel].rs_control,
3664 cy_readl(&ch_ctrl[channel].rs_control) | C_RS_RTS);
3665 CY_UNLOCK(info, flags);
3666 }
3667 if (clear & TIOCM_RTS) {
3668 CY_LOCK(info, flags);
3669 cy_writel(&ch_ctrl[channel].rs_control,
3670 cy_readl(&ch_ctrl[channel].rs_control) & ~C_RS_RTS);
3671 CY_UNLOCK(info, flags);
3672 }
3673 if (set & TIOCM_DTR){
3674 CY_LOCK(info, flags);
3675 cy_writel(&ch_ctrl[channel].rs_control,
3676 cy_readl(&ch_ctrl[channel].rs_control) | C_RS_DTR);
3677 #ifdef CY_DEBUG_DTR
3678 printk("cyc:set_modem_info raising Z DTR\n");
3679 #endif
3680 CY_UNLOCK(info, flags);
3681 }
3682 if (clear & TIOCM_DTR) {
3683 CY_LOCK(info, flags);
3684 cy_writel(&ch_ctrl[channel].rs_control,
3685 cy_readl(&ch_ctrl[channel].rs_control) & ~C_RS_DTR);
3686 #ifdef CY_DEBUG_DTR
3687 printk("cyc:set_modem_info clearing Z DTR\n");
3688 #endif
3689 CY_UNLOCK(info, flags);
3690 }
3691 }else{
3692 return -ENODEV;
3693 }
3694 CY_LOCK(info, flags);
3695 retval = cyz_issue_cmd(&cy_card[info->card],
3696 channel, C_CM_IOCTLM,0L);
3697 if (retval != 0){
3698 printk("cyc:set_modem_info retval on ttyC%d was %x\n",
3699 info->line, retval);
3700 }
3701 CY_UNLOCK(info, flags);
3702 }
3703 return 0;
3704 } /* cy_tiocmset */
3705
3706 /*
3707 * cy_break() --- routine which turns the break handling on or off
3708 */
3709 static void
3710 cy_break(struct tty_struct *tty, int break_state)
3711 {
3712 struct cyclades_port * info = (struct cyclades_port *)tty->driver_data;
3713 unsigned long flags;
3714
3715 if (serial_paranoia_check(info, tty->name, "cy_break"))
3716 return;
3717
3718 CY_LOCK(info, flags);
3719 if (!IS_CYC_Z(cy_card[info->card])) {
3720 /* Let the transmit ISR take care of this (since it
3721 requires stuffing characters into the output stream).
3722 */
3723 if (break_state == -1) {
3724 if (!info->breakon) {
3725 info->breakon = 1;
3726 if (!info->xmit_cnt) {
3727 CY_UNLOCK(info, flags);
3728 start_xmit(info);
3729 CY_LOCK(info, flags);
3730 }
3731 }
3732 } else {
3733 if (!info->breakoff) {
3734 info->breakoff = 1;
3735 if (!info->xmit_cnt) {
3736 CY_UNLOCK(info, flags);
3737 start_xmit(info);
3738 CY_LOCK(info, flags);
3739 }
3740 }
3741 }
3742 } else {
3743 int retval;
3744
3745 if (break_state == -1) {
3746 retval = cyz_issue_cmd(&cy_card[info->card],
3747 (info->line) - (cy_card[info->card].first_line),
3748 C_CM_SET_BREAK, 0L);
3749 if (retval != 0) {
3750 printk("cyc:cy_break (set) retval on ttyC%d was %x\n",
3751 info->line, retval);
3752 }
3753 } else {
3754 retval = cyz_issue_cmd(&cy_card[info->card],
3755 (info->line) - (cy_card[info->card].first_line),
3756 C_CM_CLR_BREAK, 0L);
3757 if (retval != 0) {
3758 printk("cyc:cy_break (clr) retval on ttyC%d was %x\n",
3759 info->line, retval);
3760 }
3761 }
3762 }
3763 CY_UNLOCK(info, flags);
3764 } /* cy_break */
3765
3766 static int
3767 get_mon_info(struct cyclades_port * info, struct cyclades_monitor __user * mon)
3768 {
3769
3770 if(copy_to_user(mon, &info->mon, sizeof(struct cyclades_monitor)))
3771 return -EFAULT;
3772 info->mon.int_count = 0;
3773 info->mon.char_count = 0;
3774 info->mon.char_max = 0;
3775 info->mon.char_last = 0;
3776 return 0;
3777 }/* get_mon_info */
3778
3779
3780 static int
3781 set_threshold(struct cyclades_port * info, unsigned long value)
3782 {
3783 void __iomem *base_addr;
3784 int card,channel,chip,index;
3785 unsigned long flags;
3786
3787 card = info->card;
3788 channel = info->line - cy_card[card].first_line;
3789 if (!IS_CYC_Z(cy_card[card])) {
3790 chip = channel>>2;
3791 channel &= 0x03;
3792 index = cy_card[card].bus_index;
3793 base_addr = cy_card[card].base_addr + (cy_chip_offset[chip]<<index);
3794
3795 info->cor3 &= ~CyREC_FIFO;
3796 info->cor3 |= value & CyREC_FIFO;
3797
3798 CY_LOCK(info, flags);
3799 cy_writeb(base_addr+(CyCOR3<<index), info->cor3);
3800 cyy_issue_cmd(base_addr,CyCOR_CHANGE|CyCOR3ch,index);
3801 CY_UNLOCK(info, flags);
3802 } else {
3803 // Nothing to do!
3804 }
3805 return 0;
3806 }/* set_threshold */
3807
3808
3809 static int
3810 get_threshold(struct cyclades_port * info, unsigned long __user *value)
3811 {
3812 void __iomem *base_addr;
3813 int card,channel,chip,index;
3814 unsigned long tmp;
3815
3816 card = info->card;
3817 channel = info->line - cy_card[card].first_line;
3818 if (!IS_CYC_Z(cy_card[card])) {
3819 chip = channel>>2;
3820 channel &= 0x03;
3821 index = cy_card[card].bus_index;
3822 base_addr = cy_card[card].base_addr + (cy_chip_offset[chip]<<index);
3823
3824 tmp = cy_readb(base_addr+(CyCOR3<<index)) & CyREC_FIFO;
3825 return put_user(tmp,value);
3826 } else {
3827 // Nothing to do!
3828 return 0;
3829 }
3830 }/* get_threshold */
3831
3832
3833 static int
3834 set_default_threshold(struct cyclades_port * info, unsigned long value)
3835 {
3836 info->default_threshold = value & 0x0f;
3837 return 0;
3838 }/* set_default_threshold */
3839
3840
3841 static int
3842 get_default_threshold(struct cyclades_port * info, unsigned long __user *value)
3843 {
3844 return put_user(info->default_threshold,value);
3845 }/* get_default_threshold */
3846
3847
3848 static int
3849 set_timeout(struct cyclades_port * info, unsigned long value)
3850 {
3851 void __iomem *base_addr;
3852 int card,channel,chip,index;
3853 unsigned long flags;
3854
3855 card = info->card;
3856 channel = info->line - cy_card[card].first_line;
3857 if (!IS_CYC_Z(cy_card[card])) {
3858 chip = channel>>2;
3859 channel &= 0x03;
3860 index = cy_card[card].bus_index;
3861 base_addr = cy_card[card].base_addr + (cy_chip_offset[chip]<<index);
3862
3863 CY_LOCK(info, flags);
3864 cy_writeb(base_addr+(CyRTPR<<index), value & 0xff);
3865 CY_UNLOCK(info, flags);
3866 } else {
3867 // Nothing to do!
3868 }
3869 return 0;
3870 }/* set_timeout */
3871
3872
3873 static int
3874 get_timeout(struct cyclades_port * info, unsigned long __user *value)
3875 {
3876 void __iomem *base_addr;
3877 int card,channel,chip,index;
3878 unsigned long tmp;
3879
3880 card = info->card;
3881 channel = info->line - cy_card[card].first_line;
3882 if (!IS_CYC_Z(cy_card[card])) {
3883 chip = channel>>2;
3884 channel &= 0x03;
3885 index = cy_card[card].bus_index;
3886 base_addr = cy_card[card].base_addr + (cy_chip_offset[chip]<<index);
3887
3888 tmp = cy_readb(base_addr+(CyRTPR<<index));
3889 return put_user(tmp,value);
3890 } else {
3891 // Nothing to do!
3892 return 0;
3893 }
3894 }/* get_timeout */
3895
3896
3897 static int
3898 set_default_timeout(struct cyclades_port * info, unsigned long value)
3899 {
3900 info->default_timeout = value & 0xff;
3901 return 0;
3902 }/* set_default_timeout */
3903
3904
3905 static int
3906 get_default_timeout(struct cyclades_port * info, unsigned long __user *value)
3907 {
3908 return put_user(info->default_timeout,value);
3909 }/* get_default_timeout */
3910
3911 /*
3912 * This routine allows the tty driver to implement device-
3913 * specific ioctl's. If the ioctl number passed in cmd is
3914 * not recognized by the driver, it should return ENOIOCTLCMD.
3915 */
3916 static int
3917 cy_ioctl(struct tty_struct *tty, struct file * file,
3918 unsigned int cmd, unsigned long arg)
3919 {
3920 struct cyclades_port * info = (struct cyclades_port *)tty->driver_data;
3921 struct cyclades_icount cprev, cnow; /* kernel counter temps */
3922 struct serial_icounter_struct __user *p_cuser; /* user space */
3923 int ret_val = 0;
3924 unsigned long flags;
3925 void __user *argp = (void __user *)arg;
3926
3927 if (serial_paranoia_check(info, tty->name, "cy_ioctl"))
3928 return -ENODEV;
3929
3930 #ifdef CY_DEBUG_OTHER
3931 printk("cyc:cy_ioctl ttyC%d, cmd = %x arg = %lx\n",
3932 info->line, cmd, arg); /* */
3933 #endif
3934
3935 switch (cmd) {
3936 case CYGETMON:
3937 ret_val = get_mon_info(info, argp);
3938 break;
3939 case CYGETTHRESH:
3940 ret_val = get_threshold(info, argp);
3941 break;
3942 case CYSETTHRESH:
3943 ret_val = set_threshold(info, arg);
3944 break;
3945 case CYGETDEFTHRESH:
3946 ret_val = get_default_threshold(info, argp);
3947 break;
3948 case CYSETDEFTHRESH:
3949 ret_val = set_default_threshold(info, arg);
3950 break;
3951 case CYGETTIMEOUT:
3952 ret_val = get_timeout(info, argp);
3953 break;
3954 case CYSETTIMEOUT:
3955 ret_val = set_timeout(info, arg);
3956 break;
3957 case CYGETDEFTIMEOUT:
3958 ret_val = get_default_timeout(info, argp);
3959 break;
3960 case CYSETDEFTIMEOUT:
3961 ret_val = set_default_timeout(info, arg);
3962 break;
3963 case CYSETRFLOW:
3964 info->rflow = (int)arg;
3965 ret_val = 0;
3966 break;
3967 case CYGETRFLOW:
3968 ret_val = info->rflow;
3969 break;
3970 case CYSETRTSDTR_INV:
3971 info->rtsdtr_inv = (int)arg;
3972 ret_val = 0;
3973 break;
3974 case CYGETRTSDTR_INV:
3975 ret_val = info->rtsdtr_inv;
3976 break;
3977 case CYGETCARDINFO:
3978 if (copy_to_user(argp, &cy_card[info->card],
3979 sizeof (struct cyclades_card))) {
3980 ret_val = -EFAULT;
3981 break;
3982 }
3983 ret_val = 0;
3984 break;
3985 case CYGETCD1400VER:
3986 ret_val = info->chip_rev;
3987 break;
3988 #ifndef CONFIG_CYZ_INTR
3989 case CYZSETPOLLCYCLE:
3990 cyz_polling_cycle = (arg * HZ) / 1000;
3991 ret_val = 0;
3992 break;
3993 case CYZGETPOLLCYCLE:
3994 ret_val = (cyz_polling_cycle * 1000) / HZ;
3995 break;
3996 #endif /* CONFIG_CYZ_INTR */
3997 case CYSETWAIT:
3998 info->closing_wait = (unsigned short)arg * HZ/100;
3999 ret_val = 0;
4000 break;
4001 case CYGETWAIT:
4002 ret_val = info->closing_wait / (HZ/100);
4003 break;
4004 case TIOCGSERIAL:
4005 ret_val = get_serial_info(info, argp);
4006 break;
4007 case TIOCSSERIAL:
4008 ret_val = set_serial_info(info, argp);
4009 break;
4010 case TIOCSERGETLSR: /* Get line status register */
4011 ret_val = get_lsr_info(info, argp);
4012 break;
4013 /*
4014 * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
4015 * - mask passed in arg for lines of interest
4016 * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
4017 * Caller should use TIOCGICOUNT to see which one it was
4018 */
4019 case TIOCMIWAIT:
4020 CY_LOCK(info, flags);
4021 /* note the counters on entry */
4022 cprev = info->icount;
4023 CY_UNLOCK(info, flags);
4024 while (1) {
4025 interruptible_sleep_on(&info->delta_msr_wait);
4026 /* see if a signal did it */
4027 if (signal_pending(current)) {
4028 return -ERESTARTSYS;
4029 }
4030
4031 CY_LOCK(info, flags);
4032 cnow = info->icount; /* atomic copy */
4033 CY_UNLOCK(info, flags);
4034
4035 if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
4036 cnow.dcd == cprev.dcd && cnow.cts == cprev.cts) {
4037 return -EIO; /* no change => error */
4038 }
4039 if ( ((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
4040 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
4041 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) ||
4042 ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts)) ) {
4043 return 0;
4044 }
4045 cprev = cnow;
4046 }
4047 /* NOTREACHED */
4048
4049 /*
4050 * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
4051 * Return: write counters to the user passed counter struct
4052 * NB: both 1->0 and 0->1 transitions are counted except for
4053 * RI where only 0->1 is counted.
4054 */
4055 case TIOCGICOUNT:
4056 CY_LOCK(info, flags);
4057 cnow = info->icount;
4058 CY_UNLOCK(info, flags);
4059 p_cuser = argp;
4060 ret_val = put_user(cnow.cts, &p_cuser->cts);
4061 if (ret_val) return ret_val;
4062 ret_val = put_user(cnow.dsr, &p_cuser->dsr);
4063 if (ret_val) return ret_val;
4064 ret_val = put_user(cnow.rng, &p_cuser->rng);
4065 if (ret_val) return ret_val;
4066 ret_val = put_user(cnow.dcd, &p_cuser->dcd);
4067 if (ret_val) return ret_val;
4068 ret_val = put_user(cnow.rx, &p_cuser->rx);
4069 if (ret_val) return ret_val;
4070 ret_val = put_user(cnow.tx, &p_cuser->tx);
4071 if (ret_val) return ret_val;
4072 ret_val = put_user(cnow.frame, &p_cuser->frame);
4073 if (ret_val) return ret_val;
4074 ret_val = put_user(cnow.overrun, &p_cuser->overrun);
4075 if (ret_val) return ret_val;
4076 ret_val = put_user(cnow.parity, &p_cuser->parity);
4077 if (ret_val) return ret_val;
4078 ret_val = put_user(cnow.brk, &p_cuser->brk);
4079 if (ret_val) return ret_val;
4080 ret_val = put_user(cnow.buf_overrun, &p_cuser->buf_overrun);
4081 if (ret_val) return ret_val;
4082 ret_val = 0;
4083 break;
4084 default:
4085 ret_val = -ENOIOCTLCMD;
4086 }
4087
4088 #ifdef CY_DEBUG_OTHER
4089 printk(" cyc:cy_ioctl done\n");
4090 #endif
4091
4092 return ret_val;
4093 } /* cy_ioctl */
4094
4095
4096 /*
4097 * This routine allows the tty driver to be notified when
4098 * device's termios settings have changed. Note that a
4099 * well-designed tty driver should be prepared to accept the case
4100 * where old == NULL, and try to do something rational.
4101 */
4102 static void
4103 cy_set_termios(struct tty_struct *tty, struct termios * old_termios)
4104 {
4105 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
4106
4107 #ifdef CY_DEBUG_OTHER
4108 printk("cyc:cy_set_termios ttyC%d\n", info->line);
4109 #endif
4110
4111 if ((tty->termios->c_cflag == old_termios->c_cflag) &&
4112 ((tty->termios->c_iflag & (IXON|IXANY)) ==
4113 (old_termios->c_iflag & (IXON|IXANY))))
4114 return;
4115 set_line_char(info);
4116
4117 if ((old_termios->c_cflag & CRTSCTS) &&
4118 !(tty->termios->c_cflag & CRTSCTS)) {
4119 tty->hw_stopped = 0;
4120 cy_start(tty);
4121 }
4122 #if 0
4123 /*
4124 * No need to wake up processes in open wait, since they
4125 * sample the CLOCAL flag once, and don't recheck it.
4126 * XXX It's not clear whether the current behavior is correct
4127 * or not. Hence, this may change.....
4128 */
4129 if (!(old_termios->c_cflag & CLOCAL) &&
4130 (tty->termios->c_cflag & CLOCAL))
4131 wake_up_interruptible(&info->open_wait);
4132 #endif
4133
4134 return;
4135 } /* cy_set_termios */
4136
4137 /* This function is used to send a high-priority XON/XOFF character to
4138 the device.
4139 */
4140 static void
4141 cy_send_xchar (struct tty_struct *tty, char ch)
4142 {
4143 struct cyclades_port *info = (struct cyclades_port *) tty->driver_data;
4144 int card, channel;
4145
4146 if (serial_paranoia_check (info, tty->name, "cy_send_xchar"))
4147 return;
4148
4149 info->x_char = ch;
4150
4151 if (ch)
4152 cy_start (tty);
4153
4154 card = info->card;
4155 channel = info->line - cy_card[card].first_line;
4156
4157 if (IS_CYC_Z (cy_card[card])) {
4158 if (ch == STOP_CHAR (tty))
4159 cyz_issue_cmd (&cy_card[card], channel, C_CM_SENDXOFF, 0L);
4160 else if (ch == START_CHAR (tty))
4161 cyz_issue_cmd (&cy_card[card], channel, C_CM_SENDXON, 0L);
4162 }
4163 }
4164
4165 /* This routine is called by the upper-layer tty layer to signal
4166 that incoming characters should be throttled because the input
4167 buffers are close to full.
4168 */
4169 static void
4170 cy_throttle(struct tty_struct * tty)
4171 {
4172 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
4173 unsigned long flags;
4174 void __iomem *base_addr;
4175 int card,chip,channel,index;
4176
4177 #ifdef CY_DEBUG_THROTTLE
4178 char buf[64];
4179
4180 printk("cyc:throttle %s: %d....ttyC%d\n",
4181 tty_name(tty, buf),
4182 tty->ldisc.chars_in_buffer(tty), info->line);
4183 #endif
4184
4185 if (serial_paranoia_check(info, tty->name, "cy_throttle")){
4186 return;
4187 }
4188
4189 card = info->card;
4190
4191 if (I_IXOFF(tty)) {
4192 if (!IS_CYC_Z (cy_card[card]))
4193 cy_send_xchar (tty, STOP_CHAR (tty));
4194 else
4195 info->throttle = 1;
4196 }
4197
4198 if (tty->termios->c_cflag & CRTSCTS) {
4199 channel = info->line - cy_card[card].first_line;
4200 if (!IS_CYC_Z(cy_card[card])) {
4201 chip = channel>>2;
4202 channel &= 0x03;
4203 index = cy_card[card].bus_index;
4204 base_addr = cy_card[card].base_addr + (cy_chip_offset[chip]<<index);
4205
4206 CY_LOCK(info, flags);
4207 cy_writeb(base_addr+(CyCAR<<index), (u_char)channel);
4208 if (info->rtsdtr_inv) {
4209 cy_writeb(base_addr+(CyMSVR2<<index), ~CyDTR);
4210 } else {
4211 cy_writeb(base_addr+(CyMSVR1<<index), ~CyRTS);
4212 }
4213 CY_UNLOCK(info, flags);
4214 } else {
4215 info->throttle = 1;
4216 }
4217 }
4218
4219 return;
4220 } /* cy_throttle */
4221
4222
4223 /*
4224 * This routine notifies the tty driver that it should signal
4225 * that characters can now be sent to the tty without fear of
4226 * overrunning the input buffers of the line disciplines.
4227 */
4228 static void
4229 cy_unthrottle(struct tty_struct * tty)
4230 {
4231 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
4232 unsigned long flags;
4233 void __iomem *base_addr;
4234 int card,chip,channel,index;
4235
4236 #ifdef CY_DEBUG_THROTTLE
4237 char buf[64];
4238
4239 printk("cyc:unthrottle %s: %d....ttyC%d\n",
4240 tty_name(tty, buf),
4241 tty->ldisc.chars_in_buffer(tty), info->line);
4242 #endif
4243
4244 if (serial_paranoia_check(info, tty->name, "cy_unthrottle")){
4245 return;
4246 }
4247
4248 if (I_IXOFF(tty)) {
4249 if (info->x_char)
4250 info->x_char = 0;
4251 else
4252 cy_send_xchar (tty, START_CHAR (tty));
4253 }
4254
4255 if (tty->termios->c_cflag & CRTSCTS) {
4256 card = info->card;
4257 channel = info->line - cy_card[card].first_line;
4258 if (!IS_CYC_Z(cy_card[card])) {
4259 chip = channel>>2;
4260 channel &= 0x03;
4261 index = cy_card[card].bus_index;
4262 base_addr = cy_card[card].base_addr + (cy_chip_offset[chip]<<index);
4263
4264 CY_LOCK(info, flags);
4265 cy_writeb(base_addr+(CyCAR<<index), (u_char)channel);
4266 if (info->rtsdtr_inv) {
4267 cy_writeb(base_addr+(CyMSVR2<<index), CyDTR);
4268 } else {
4269 cy_writeb(base_addr+(CyMSVR1<<index), CyRTS);
4270 }
4271 CY_UNLOCK(info, flags);
4272 } else {
4273 info->throttle = 0;
4274 }
4275 }
4276
4277 return;
4278 } /* cy_unthrottle */
4279
4280
4281 /* cy_start and cy_stop provide software output flow control as a
4282 function of XON/XOFF, software CTS, and other such stuff.
4283 */
4284 static void
4285 cy_stop(struct tty_struct *tty)
4286 {
4287 struct cyclades_card *cinfo;
4288 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
4289 void __iomem *base_addr;
4290 int chip,channel,index;
4291 unsigned long flags;
4292
4293 #ifdef CY_DEBUG_OTHER
4294 printk("cyc:cy_stop ttyC%d\n", info->line); /* */
4295 #endif
4296
4297 if (serial_paranoia_check(info, tty->name, "cy_stop"))
4298 return;
4299
4300 cinfo = &cy_card[info->card];
4301 channel = info->line - cinfo->first_line;
4302 if (!IS_CYC_Z(*cinfo)) {
4303 index = cinfo->bus_index;
4304 chip = channel>>2;
4305 channel &= 0x03;
4306 base_addr = cy_card[info->card].base_addr + (cy_chip_offset[chip]<<index);
4307
4308 CY_LOCK(info, flags);
4309 cy_writeb(base_addr+(CyCAR<<index),
4310 (u_char)(channel & 0x0003)); /* index channel */
4311 cy_writeb(base_addr+(CySRER<<index),
4312 cy_readb(base_addr+(CySRER<<index)) & ~CyTxRdy);
4313 CY_UNLOCK(info, flags);
4314 } else {
4315 // Nothing to do!
4316 }
4317
4318 return;
4319 } /* cy_stop */
4320
4321
4322 static void
4323 cy_start(struct tty_struct *tty)
4324 {
4325 struct cyclades_card *cinfo;
4326 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
4327 void __iomem *base_addr;
4328 int chip,channel,index;
4329 unsigned long flags;
4330
4331 #ifdef CY_DEBUG_OTHER
4332 printk("cyc:cy_start ttyC%d\n", info->line); /* */
4333 #endif
4334
4335 if (serial_paranoia_check(info, tty->name, "cy_start"))
4336 return;
4337
4338 cinfo = &cy_card[info->card];
4339 channel = info->line - cinfo->first_line;
4340 index = cinfo->bus_index;
4341 if (!IS_CYC_Z(*cinfo)) {
4342 chip = channel>>2;
4343 channel &= 0x03;
4344 base_addr = cy_card[info->card].base_addr + (cy_chip_offset[chip]<<index);
4345
4346 CY_LOCK(info, flags);
4347 cy_writeb(base_addr+(CyCAR<<index),
4348 (u_char)(channel & 0x0003)); /* index channel */
4349 cy_writeb(base_addr+(CySRER<<index),
4350 cy_readb(base_addr+(CySRER<<index)) | CyTxRdy);
4351 CY_UNLOCK(info, flags);
4352 } else {
4353 // Nothing to do!
4354 }
4355
4356 return;
4357 } /* cy_start */
4358
4359
4360 static void
4361 cy_flush_buffer(struct tty_struct *tty)
4362 {
4363 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
4364 int card, channel, retval;
4365 unsigned long flags;
4366
4367 #ifdef CY_DEBUG_IO
4368 printk("cyc:cy_flush_buffer ttyC%d\n", info->line); /* */
4369 #endif
4370
4371 if (serial_paranoia_check(info, tty->name, "cy_flush_buffer"))
4372 return;
4373
4374 card = info->card;
4375 channel = (info->line) - (cy_card[card].first_line);
4376
4377 CY_LOCK(info, flags);
4378 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
4379 CY_UNLOCK(info, flags);
4380
4381 if (IS_CYC_Z(cy_card[card])) { /* If it is a Z card, flush the on-board
4382 buffers as well */
4383 CY_LOCK(info, flags);
4384 retval = cyz_issue_cmd(&cy_card[card], channel, C_CM_FLUSH_TX, 0L);
4385 if (retval != 0) {
4386 printk("cyc: flush_buffer retval on ttyC%d was %x\n",
4387 info->line, retval);
4388 }
4389 CY_UNLOCK(info, flags);
4390 }
4391 tty_wakeup(tty);
4392 wake_up_interruptible(&tty->write_wait);
4393 } /* cy_flush_buffer */
4394
4395
4396 /*
4397 * cy_hangup() --- called by tty_hangup() when a hangup is signaled.
4398 */
4399 static void
4400 cy_hangup(struct tty_struct *tty)
4401 {
4402 struct cyclades_port * info = (struct cyclades_port *)tty->driver_data;
4403
4404 #ifdef CY_DEBUG_OTHER
4405 printk("cyc:cy_hangup ttyC%d\n", info->line); /* */
4406 #endif
4407
4408 if (serial_paranoia_check(info, tty->name, "cy_hangup"))
4409 return;
4410
4411 cy_flush_buffer(tty);
4412 shutdown(info);
4413 info->event = 0;
4414 info->count = 0;
4415 #ifdef CY_DEBUG_COUNT
4416 printk("cyc:cy_hangup (%d): setting count to 0\n", current->pid);
4417 #endif
4418 info->tty = NULL;
4419 info->flags &= ~ASYNC_NORMAL_ACTIVE;
4420 wake_up_interruptible(&info->open_wait);
4421 } /* cy_hangup */
4422
4423
4424 /*
4425 * ---------------------------------------------------------------------
4426 * cy_init() and friends
4427 *
4428 * cy_init() is called at boot-time to initialize the serial driver.
4429 * ---------------------------------------------------------------------
4430 */
4431
4432 /* initialize chips on Cyclom-Y card -- return number of valid
4433 chips (which is number of ports/4) */
4434 static unsigned short __init
4435 cyy_init_card(void __iomem *true_base_addr,int index)
4436 {
4437 unsigned int chip_number;
4438 void __iomem *base_addr;
4439
4440 cy_writeb(true_base_addr+(Cy_HwReset<<index), 0);
4441 /* Cy_HwReset is 0x1400 */
4442 cy_writeb(true_base_addr+(Cy_ClrIntr<<index), 0);
4443 /* Cy_ClrIntr is 0x1800 */
4444 udelay(500L);
4445
4446 for(chip_number=0; chip_number<CyMAX_CHIPS_PER_CARD; chip_number++){
4447 base_addr = true_base_addr + (cy_chip_offset[chip_number]<<index);
4448 mdelay(1);
4449 if(cy_readb(base_addr+(CyCCR<<index)) != 0x00){
4450 /*************
4451 printk(" chip #%d at %#6lx is never idle (CCR != 0)\n",
4452 chip_number, (unsigned long)base_addr);
4453 *************/
4454 return chip_number;
4455 }
4456
4457 cy_writeb(base_addr+(CyGFRCR<<index), 0);
4458 udelay(10L);
4459
4460 /* The Cyclom-16Y does not decode address bit 9 and therefore
4461 cannot distinguish between references to chip 0 and a non-
4462 existent chip 4. If the preceding clearing of the supposed
4463 chip 4 GFRCR register appears at chip 0, there is no chip 4
4464 and this must be a Cyclom-16Y, not a Cyclom-32Ye.
4465 */
4466 if (chip_number == 4
4467 && cy_readb(true_base_addr
4468 + (cy_chip_offset[0]<<index)
4469 + (CyGFRCR<<index)) == 0){
4470 return chip_number;
4471 }
4472
4473 cy_writeb(base_addr+(CyCCR<<index), CyCHIP_RESET);
4474 mdelay(1);
4475
4476 if(cy_readb(base_addr+(CyGFRCR<<index)) == 0x00){
4477 /*
4478 printk(" chip #%d at %#6lx is not responding ",
4479 chip_number, (unsigned long)base_addr);
4480 printk("(GFRCR stayed 0)\n",
4481 */
4482 return chip_number;
4483 }
4484 if((0xf0 & (cy_readb(base_addr+(CyGFRCR<<index)))) != 0x40){
4485 /*
4486 printk(" chip #%d at %#6lx is not valid (GFRCR == %#2x)\n",
4487 chip_number, (unsigned long)base_addr,
4488 base_addr[CyGFRCR<<index]);
4489 */
4490 return chip_number;
4491 }
4492 cy_writeb(base_addr+(CyGCR<<index), CyCH0_SERIAL);
4493 if (cy_readb(base_addr+(CyGFRCR<<index)) >= CD1400_REV_J){
4494 /* It is a CD1400 rev. J or later */
4495 /* Impossible to reach 5ms with this chip.
4496 Changed to 2ms instead (f = 500 Hz). */
4497 cy_writeb(base_addr+(CyPPR<<index), CyCLOCK_60_2MS);
4498 } else {
4499 /* f = 200 Hz */
4500 cy_writeb(base_addr+(CyPPR<<index), CyCLOCK_25_5MS);
4501 }
4502
4503 /*
4504 printk(" chip #%d at %#6lx is rev 0x%2x\n",
4505 chip_number, (unsigned long)base_addr,
4506 cy_readb(base_addr+(CyGFRCR<<index)));
4507 */
4508 }
4509 return chip_number;
4510 } /* cyy_init_card */
4511
4512 /*
4513 * ---------------------------------------------------------------------
4514 * cy_detect_isa() - Probe for Cyclom-Y/ISA boards.
4515 * sets global variables and return the number of ISA boards found.
4516 * ---------------------------------------------------------------------
4517 */
4518 static int __init
4519 cy_detect_isa(void)
4520 {
4521 #ifdef CONFIG_ISA
4522 unsigned short cy_isa_irq,nboard;
4523 void __iomem *cy_isa_address;
4524 unsigned short i,j,cy_isa_nchan;
4525 #ifdef MODULE
4526 int isparam = 0;
4527 #endif
4528
4529 nboard = 0;
4530
4531 #ifdef MODULE
4532 /* Check for module parameters */
4533 for(i = 0 ; i < NR_CARDS; i++) {
4534 if (maddr[i] || i) {
4535 isparam = 1;
4536 cy_isa_addresses[i] = maddr[i];
4537 }
4538 if (!maddr[i])
4539 break;
4540 }
4541 #endif
4542
4543 /* scan the address table probing for Cyclom-Y/ISA boards */
4544 for (i = 0 ; i < NR_ISA_ADDRS ; i++) {
4545 unsigned int isa_address = cy_isa_addresses[i];
4546 if (isa_address == 0x0000) {
4547 return(nboard);
4548 }
4549
4550 /* probe for CD1400... */
4551 cy_isa_address = ioremap(isa_address, CyISA_Ywin);
4552 cy_isa_nchan = CyPORTS_PER_CHIP *
4553 cyy_init_card(cy_isa_address,0);
4554 if (cy_isa_nchan == 0) {
4555 continue;
4556 }
4557
4558 #ifdef MODULE
4559 if (isparam && irq[i])
4560 cy_isa_irq = irq[i];
4561 else
4562 #endif
4563 /* find out the board's irq by probing */
4564 cy_isa_irq = detect_isa_irq(cy_isa_address);
4565 if (cy_isa_irq == 0) {
4566 printk("Cyclom-Y/ISA found at 0x%lx ",
4567 (unsigned long) cy_isa_address);
4568 printk("but the IRQ could not be detected.\n");
4569 continue;
4570 }
4571
4572 if((cy_next_channel+cy_isa_nchan) > NR_PORTS) {
4573 printk("Cyclom-Y/ISA found at 0x%lx ",
4574 (unsigned long) cy_isa_address);
4575 printk("but no more channels are available.\n");
4576 printk("Change NR_PORTS in cyclades.c and recompile kernel.\n");
4577 return(nboard);
4578 }
4579 /* fill the next cy_card structure available */
4580 for (j = 0 ; j < NR_CARDS ; j++) {
4581 if (cy_card[j].base_addr == 0) break;
4582 }
4583 if (j == NR_CARDS) { /* no more cy_cards available */
4584 printk("Cyclom-Y/ISA found at 0x%lx ",
4585 (unsigned long) cy_isa_address);
4586 printk("but no more cards can be used .\n");
4587 printk("Change NR_CARDS in cyclades.c and recompile kernel.\n");
4588 return(nboard);
4589 }
4590
4591 /* allocate IRQ */
4592 if(request_irq(cy_isa_irq, cyy_interrupt,
4593 IRQF_DISABLED, "Cyclom-Y", &cy_card[j]))
4594 {
4595 printk("Cyclom-Y/ISA found at 0x%lx ",
4596 (unsigned long) cy_isa_address);
4597 printk("but could not allocate IRQ#%d.\n",
4598 cy_isa_irq);
4599 return(nboard);
4600 }
4601
4602 /* set cy_card */
4603 cy_card[j].base_addr = cy_isa_address;
4604 cy_card[j].ctl_addr = NULL;
4605 cy_card[j].irq = (int) cy_isa_irq;
4606 cy_card[j].bus_index = 0;
4607 cy_card[j].first_line = cy_next_channel;
4608 cy_card[j].num_chips = cy_isa_nchan/4;
4609 nboard++;
4610
4611 /* print message */
4612 printk("Cyclom-Y/ISA #%d: 0x%lx-0x%lx, IRQ%d, ",
4613 j+1, (unsigned long) cy_isa_address,
4614 (unsigned long)(cy_isa_address + (CyISA_Ywin - 1)),
4615 cy_isa_irq);
4616 printk("%d channels starting from port %d.\n",
4617 cy_isa_nchan, cy_next_channel);
4618 cy_next_channel += cy_isa_nchan;
4619 }
4620 return(nboard);
4621 #else
4622 return(0);
4623 #endif /* CONFIG_ISA */
4624 } /* cy_detect_isa */
4625
4626 static void
4627 plx_init(void __iomem *addr, uclong initctl)
4628 {
4629 /* Reset PLX */
4630 cy_writel(addr + initctl, cy_readl(addr + initctl) | 0x40000000);
4631 udelay(100L);
4632 cy_writel(addr + initctl, cy_readl(addr + initctl) & ~0x40000000);
4633
4634 /* Reload Config. Registers from EEPROM */
4635 cy_writel(addr + initctl, cy_readl(addr + initctl) | 0x20000000);
4636 udelay(100L);
4637 cy_writel(addr + initctl, cy_readl(addr + initctl) & ~0x20000000);
4638 }
4639
4640 /*
4641 * ---------------------------------------------------------------------
4642 * cy_detect_pci() - Test PCI bus presence and Cyclom-Ye/PCI.
4643 * sets global variables and return the number of PCI boards found.
4644 * ---------------------------------------------------------------------
4645 */
4646 static int __init
4647 cy_detect_pci(void)
4648 {
4649 #ifdef CONFIG_PCI
4650
4651 struct pci_dev *pdev = NULL;
4652 unsigned char cyy_rev_id;
4653 unsigned char cy_pci_irq = 0;
4654 uclong cy_pci_phys0, cy_pci_phys2;
4655 void __iomem *cy_pci_addr0, *cy_pci_addr2;
4656 unsigned short i,j,cy_pci_nchan, plx_ver;
4657 unsigned short device_id,dev_index = 0;
4658 uclong mailbox;
4659 uclong ZeIndex = 0;
4660 void __iomem *Ze_addr0[NR_CARDS], *Ze_addr2[NR_CARDS];
4661 uclong Ze_phys0[NR_CARDS], Ze_phys2[NR_CARDS];
4662 unsigned char Ze_irq[NR_CARDS];
4663 struct pci_dev *Ze_pdev[NR_CARDS];
4664
4665 for (i = 0; i < NR_CARDS; i++) {
4666 /* look for a Cyclades card by vendor and device id */
4667 while((device_id = cy_pci_dev_id[dev_index]) != 0) {
4668 if((pdev = pci_get_device(PCI_VENDOR_ID_CYCLADES,
4669 device_id, pdev)) == NULL) {
4670 dev_index++; /* try next device id */
4671 } else {
4672 break; /* found a board */
4673 }
4674 }
4675
4676 if (device_id == 0)
4677 break;
4678
4679 if (pci_enable_device(pdev))
4680 continue;
4681
4682 /* read PCI configuration area */
4683 cy_pci_irq = pdev->irq;
4684 cy_pci_phys0 = pci_resource_start(pdev, 0);
4685 cy_pci_phys2 = pci_resource_start(pdev, 2);
4686 pci_read_config_byte(pdev, PCI_REVISION_ID, &cyy_rev_id);
4687
4688 device_id &= ~PCI_DEVICE_ID_MASK;
4689
4690 if ((device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo)
4691 || (device_id == PCI_DEVICE_ID_CYCLOM_Y_Hi)){
4692 #ifdef CY_PCI_DEBUG
4693 printk("Cyclom-Y/PCI (bus=0x0%x, pci_id=0x%x, ",
4694 pdev->bus->number, pdev->devfn);
4695 printk("rev_id=%d) IRQ%d\n",
4696 cyy_rev_id, (int)cy_pci_irq);
4697 printk("Cyclom-Y/PCI:found winaddr=0x%lx ctladdr=0x%lx\n",
4698 (ulong)cy_pci_phys2, (ulong)cy_pci_phys0);
4699 #endif
4700
4701 if (pci_resource_flags(pdev, 2) & IORESOURCE_IO) {
4702 printk(" Warning: PCI I/O bit incorrectly set. "
4703 "Ignoring it...\n");
4704 pdev->resource[2].flags &= ~IORESOURCE_IO;
4705 }
4706
4707 /* Although we don't use this I/O region, we should
4708 request it from the kernel anyway, to avoid problems
4709 with other drivers accessing it. */
4710 if (pci_request_regions(pdev, "Cyclom-Y") != 0) {
4711 printk(KERN_ERR "cyclades: failed to reserve PCI resources\n");
4712 continue;
4713 }
4714
4715 #if defined(__alpha__)
4716 if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo) { /* below 1M? */
4717 printk("Cyclom-Y/PCI (bus=0x0%x, pci_id=0x%x, ",
4718 pdev->bus->number, pdev->devfn);
4719 printk("rev_id=%d) IRQ%d\n",
4720 cyy_rev_id, (int)cy_pci_irq);
4721 printk("Cyclom-Y/PCI:found winaddr=0x%lx ctladdr=0x%lx\n",
4722 (ulong)cy_pci_phys2, (ulong)cy_pci_phys0);
4723 printk("Cyclom-Y/PCI not supported for low addresses in "
4724 "Alpha systems.\n");
4725 i--;
4726 continue;
4727 }
4728 #endif
4729 cy_pci_addr0 = ioremap(cy_pci_phys0, CyPCI_Yctl);
4730 cy_pci_addr2 = ioremap(cy_pci_phys2, CyPCI_Ywin);
4731
4732 #ifdef CY_PCI_DEBUG
4733 printk("Cyclom-Y/PCI: relocate winaddr=0x%lx ctladdr=0x%lx\n",
4734 (u_long)cy_pci_addr2, (u_long)cy_pci_addr0);
4735 #endif
4736 cy_pci_nchan = (unsigned short)(CyPORTS_PER_CHIP *
4737 cyy_init_card(cy_pci_addr2, 1));
4738 if(cy_pci_nchan == 0) {
4739 printk("Cyclom-Y PCI host card with ");
4740 printk("no Serial-Modules at 0x%lx.\n",
4741 (ulong) cy_pci_phys2);
4742 i--;
4743 continue;
4744 }
4745 if((cy_next_channel+cy_pci_nchan) > NR_PORTS) {
4746 printk("Cyclom-Y/PCI found at 0x%lx ",
4747 (ulong) cy_pci_phys2);
4748 printk("but no channels are available.\n");
4749 printk("Change NR_PORTS in cyclades.c and recompile kernel.\n");
4750 return(i);
4751 }
4752 /* fill the next cy_card structure available */
4753 for (j = 0 ; j < NR_CARDS ; j++) {
4754 if (cy_card[j].base_addr == 0) break;
4755 }
4756 if (j == NR_CARDS) { /* no more cy_cards available */
4757 printk("Cyclom-Y/PCI found at 0x%lx ",
4758 (ulong) cy_pci_phys2);
4759 printk("but no more cards can be used.\n");
4760 printk("Change NR_CARDS in cyclades.c and recompile kernel.\n");
4761 return(i);
4762 }
4763
4764 /* allocate IRQ */
4765 if(request_irq(cy_pci_irq, cyy_interrupt,
4766 IRQF_SHARED, "Cyclom-Y", &cy_card[j]))
4767 {
4768 printk("Cyclom-Y/PCI found at 0x%lx ",
4769 (ulong) cy_pci_phys2);
4770 printk("but could not allocate IRQ%d.\n",
4771 cy_pci_irq);
4772 return(i);
4773 }
4774
4775 /* set cy_card */
4776 cy_card[j].base_phys = (ulong)cy_pci_phys2;
4777 cy_card[j].ctl_phys = (ulong)cy_pci_phys0;
4778 cy_card[j].base_addr = cy_pci_addr2;
4779 cy_card[j].ctl_addr = cy_pci_addr0;
4780 cy_card[j].irq = (int) cy_pci_irq;
4781 cy_card[j].bus_index = 1;
4782 cy_card[j].first_line = cy_next_channel;
4783 cy_card[j].num_chips = cy_pci_nchan/4;
4784 cy_card[j].pdev = pdev;
4785
4786 /* enable interrupts in the PCI interface */
4787 plx_ver = cy_readb(cy_pci_addr2 + CyPLX_VER) & 0x0f;
4788 switch (plx_ver) {
4789 case PLX_9050:
4790
4791 cy_writeb(cy_pci_addr0+0x4c, 0x43);
4792 break;
4793
4794 case PLX_9060:
4795 case PLX_9080:
4796 default: /* Old boards, use PLX_9060 */
4797
4798 plx_init(cy_pci_addr0, 0x6c);
4799 /* For some yet unknown reason, once the PLX9060 reloads
4800 the EEPROM, the IRQ is lost and, thus, we have to
4801 re-write it to the PCI config. registers.
4802 This will remain here until we find a permanent fix. */
4803 pci_write_config_byte(pdev, PCI_INTERRUPT_LINE, cy_pci_irq);
4804
4805 cy_writew(cy_pci_addr0+0x68,
4806 cy_readw(cy_pci_addr0+0x68)|0x0900);
4807 break;
4808 }
4809
4810 /* print message */
4811 printk("Cyclom-Y/PCI #%d: 0x%lx-0x%lx, IRQ%d, ",
4812 j+1,
4813 (ulong)cy_pci_phys2,
4814 (ulong)(cy_pci_phys2 + CyPCI_Ywin - 1),
4815 (int)cy_pci_irq);
4816 printk("%d channels starting from port %d.\n",
4817 cy_pci_nchan, cy_next_channel);
4818
4819 cy_next_channel += cy_pci_nchan;
4820 }else if (device_id == PCI_DEVICE_ID_CYCLOM_Z_Lo){
4821 /* print message */
4822 printk("Cyclades-Z/PCI (bus=0x0%x, pci_id=0x%x, ",
4823 pdev->bus->number, pdev->devfn);
4824 printk("rev_id=%d) IRQ%d\n",
4825 cyy_rev_id, (int)cy_pci_irq);
4826 printk("Cyclades-Z/PCI: found winaddr=0x%lx ctladdr=0x%lx\n",
4827 (ulong)cy_pci_phys2, (ulong)cy_pci_phys0);
4828 printk("Cyclades-Z/PCI not supported for low addresses\n");
4829 break;
4830 }else if (device_id == PCI_DEVICE_ID_CYCLOM_Z_Hi){
4831 #ifdef CY_PCI_DEBUG
4832 printk("Cyclades-Z/PCI (bus=0x0%x, pci_id=0x%x, ",
4833 pdev->bus->number, pdev->devfn);
4834 printk("rev_id=%d) IRQ%d\n",
4835 cyy_rev_id, (int)cy_pci_irq);
4836 printk("Cyclades-Z/PCI: found winaddr=0x%lx ctladdr=0x%lx\n",
4837 (ulong)cy_pci_phys2, (ulong)cy_pci_phys0);
4838 #endif
4839 cy_pci_addr0 = ioremap(cy_pci_phys0, CyPCI_Zctl);
4840
4841 /* Disable interrupts on the PLX before resetting it */
4842 cy_writew(cy_pci_addr0+0x68,
4843 cy_readw(cy_pci_addr0+0x68) & ~0x0900);
4844
4845 plx_init(cy_pci_addr0, 0x6c);
4846 /* For some yet unknown reason, once the PLX9060 reloads
4847 the EEPROM, the IRQ is lost and, thus, we have to
4848 re-write it to the PCI config. registers.
4849 This will remain here until we find a permanent fix. */
4850 pci_write_config_byte(pdev, PCI_INTERRUPT_LINE, cy_pci_irq);
4851
4852 mailbox = (uclong)cy_readl(&((struct RUNTIME_9060 __iomem *)
4853 cy_pci_addr0)->mail_box_0);
4854
4855 if (pci_resource_flags(pdev, 2) & IORESOURCE_IO) {
4856 printk(" Warning: PCI I/O bit incorrectly set. "
4857 "Ignoring it...\n");
4858 pdev->resource[2].flags &= ~IORESOURCE_IO;
4859 }
4860
4861 /* Although we don't use this I/O region, we should
4862 request it from the kernel anyway, to avoid problems
4863 with other drivers accessing it. */
4864 if (pci_request_regions(pdev, "Cyclades-Z") != 0) {
4865 printk(KERN_ERR "cyclades: failed to reserve PCI resources\n");
4866 continue;
4867 }
4868
4869 if (mailbox == ZE_V1) {
4870 cy_pci_addr2 = ioremap(cy_pci_phys2, CyPCI_Ze_win);
4871 if (ZeIndex == NR_CARDS) {
4872 printk("Cyclades-Ze/PCI found at 0x%lx ",
4873 (ulong)cy_pci_phys2);
4874 printk("but no more cards can be used.\n");
4875 printk("Change NR_CARDS in cyclades.c and recompile kernel.\n");
4876 } else {
4877 Ze_phys0[ZeIndex] = cy_pci_phys0;
4878 Ze_phys2[ZeIndex] = cy_pci_phys2;
4879 Ze_addr0[ZeIndex] = cy_pci_addr0;
4880 Ze_addr2[ZeIndex] = cy_pci_addr2;
4881 Ze_irq[ZeIndex] = cy_pci_irq;
4882 Ze_pdev[ZeIndex] = pdev;
4883 ZeIndex++;
4884 }
4885 i--;
4886 continue;
4887 } else {
4888 cy_pci_addr2 = ioremap(cy_pci_phys2, CyPCI_Zwin);
4889 }
4890
4891 #ifdef CY_PCI_DEBUG
4892 printk("Cyclades-Z/PCI: relocate winaddr=0x%lx ctladdr=0x%lx\n",
4893 (ulong)cy_pci_addr2, (ulong)cy_pci_addr0);
4894 if (mailbox == ZO_V1) {
4895 cy_writel(&((struct RUNTIME_9060 *)
4896 (cy_pci_addr0))->loc_addr_base, WIN_CREG);
4897 PAUSE
4898 printk("Cyclades-8Zo/PCI: FPGA id %lx, ver %lx\n",
4899 (ulong)(0xff & cy_readl(&((struct CUSTOM_REG *)
4900 (cy_pci_addr2))->fpga_id)),
4901 (ulong)(0xff & cy_readl(&((struct CUSTOM_REG *)
4902 (cy_pci_addr2))->fpga_version)));
4903 cy_writel(&((struct RUNTIME_9060 *)
4904 (cy_pci_addr0))->loc_addr_base, WIN_RAM);
4905 } else {
4906 printk("Cyclades-Z/PCI: New Cyclades-Z board. FPGA not loaded\n");
4907 }
4908 #endif
4909 /* The following clears the firmware id word. This ensures
4910 that the driver will not attempt to talk to the board
4911 until it has been properly initialized.
4912 */
4913 PAUSE
4914 if ((mailbox == ZO_V1) || (mailbox == ZO_V2))
4915 cy_writel(cy_pci_addr2 + ID_ADDRESS, 0L);
4916
4917 /* This must be a Cyclades-8Zo/PCI. The extendable
4918 version will have a different device_id and will
4919 be allocated its maximum number of ports. */
4920 cy_pci_nchan = 8;
4921
4922 if((cy_next_channel+cy_pci_nchan) > NR_PORTS) {
4923 printk("Cyclades-8Zo/PCI found at 0x%lx ",
4924 (ulong)cy_pci_phys2);
4925 printk("but no channels are available.\n");
4926 printk("Change NR_PORTS in cyclades.c and recompile kernel.\n");
4927 return(i);
4928 }
4929
4930 /* fill the next cy_card structure available */
4931 for (j = 0 ; j < NR_CARDS ; j++) {
4932 if (cy_card[j].base_addr == 0) break;
4933 }
4934 if (j == NR_CARDS) { /* no more cy_cards available */
4935 printk("Cyclades-8Zo/PCI found at 0x%lx ",
4936 (ulong)cy_pci_phys2);
4937 printk("but no more cards can be used.\n");
4938 printk("Change NR_CARDS in cyclades.c and recompile kernel.\n");
4939 return(i);
4940 }
4941
4942 #ifdef CONFIG_CYZ_INTR
4943 /* allocate IRQ only if board has an IRQ */
4944 if( (cy_pci_irq != 0) && (cy_pci_irq != 255) ) {
4945 if(request_irq(cy_pci_irq, cyz_interrupt,
4946 IRQF_SHARED, "Cyclades-Z", &cy_card[j]))
4947 {
4948 printk("Cyclom-8Zo/PCI found at 0x%lx ",
4949 (ulong) cy_pci_phys2);
4950 printk("but could not allocate IRQ%d.\n",
4951 cy_pci_irq);
4952 return(i);
4953 }
4954 }
4955 #endif /* CONFIG_CYZ_INTR */
4956
4957
4958 /* set cy_card */
4959 cy_card[j].base_phys = cy_pci_phys2;
4960 cy_card[j].ctl_phys = cy_pci_phys0;
4961 cy_card[j].base_addr = cy_pci_addr2;
4962 cy_card[j].ctl_addr = cy_pci_addr0;
4963 cy_card[j].irq = (int) cy_pci_irq;
4964 cy_card[j].bus_index = 1;
4965 cy_card[j].first_line = cy_next_channel;
4966 cy_card[j].num_chips = -1;
4967 cy_card[j].pdev = pdev;
4968
4969 /* print message */
4970 #ifdef CONFIG_CYZ_INTR
4971 /* don't report IRQ if board is no IRQ */
4972 if( (cy_pci_irq != 0) && (cy_pci_irq != 255) )
4973 printk("Cyclades-8Zo/PCI #%d: 0x%lx-0x%lx, IRQ%d, ",
4974 j+1,(ulong)cy_pci_phys2,
4975 (ulong)(cy_pci_phys2 + CyPCI_Zwin - 1),
4976 (int)cy_pci_irq);
4977 else
4978 #endif /* CONFIG_CYZ_INTR */
4979 printk("Cyclades-8Zo/PCI #%d: 0x%lx-0x%lx, ",
4980 j+1,(ulong)cy_pci_phys2,
4981 (ulong)(cy_pci_phys2 + CyPCI_Zwin - 1));
4982
4983 printk("%d channels starting from port %d.\n",
4984 cy_pci_nchan,cy_next_channel);
4985 cy_next_channel += cy_pci_nchan;
4986 }
4987 }
4988
4989 for (; ZeIndex != 0 && i < NR_CARDS; i++) {
4990 cy_pci_phys0 = Ze_phys0[0];
4991 cy_pci_phys2 = Ze_phys2[0];
4992 cy_pci_addr0 = Ze_addr0[0];
4993 cy_pci_addr2 = Ze_addr2[0];
4994 cy_pci_irq = Ze_irq[0];
4995 pdev = Ze_pdev[0];
4996 for (j = 0 ; j < ZeIndex-1 ; j++) {
4997 Ze_phys0[j] = Ze_phys0[j+1];
4998 Ze_phys2[j] = Ze_phys2[j+1];
4999 Ze_addr0[j] = Ze_addr0[j+1];
5000 Ze_addr2[j] = Ze_addr2[j+1];
5001 Ze_irq[j] = Ze_irq[j+1];
5002 Ze_pdev[j] = Ze_pdev[j+1];
5003 }
5004 ZeIndex--;
5005 mailbox = (uclong)cy_readl(&((struct RUNTIME_9060 __iomem *)
5006 cy_pci_addr0)->mail_box_0);
5007 #ifdef CY_PCI_DEBUG
5008 printk("Cyclades-Z/PCI: relocate winaddr=0x%lx ctladdr=0x%lx\n",
5009 (ulong)cy_pci_addr2, (ulong)cy_pci_addr0);
5010 printk("Cyclades-Z/PCI: New Cyclades-Z board. FPGA not loaded\n");
5011 #endif
5012 PAUSE
5013 /* This must be the new Cyclades-Ze/PCI. */
5014 cy_pci_nchan = ZE_V1_NPORTS;
5015
5016 if((cy_next_channel+cy_pci_nchan) > NR_PORTS) {
5017 printk("Cyclades-Ze/PCI found at 0x%lx ",
5018 (ulong)cy_pci_phys2);
5019 printk("but no channels are available.\n");
5020 printk("Change NR_PORTS in cyclades.c and recompile kernel.\n");
5021 return(i);
5022 }
5023
5024 /* fill the next cy_card structure available */
5025 for (j = 0 ; j < NR_CARDS ; j++) {
5026 if (cy_card[j].base_addr == 0) break;
5027 }
5028 if (j == NR_CARDS) { /* no more cy_cards available */
5029 printk("Cyclades-Ze/PCI found at 0x%lx ",
5030 (ulong)cy_pci_phys2);
5031 printk("but no more cards can be used.\n");
5032 printk("Change NR_CARDS in cyclades.c and recompile kernel.\n");
5033 return(i);
5034 }
5035
5036 #ifdef CONFIG_CYZ_INTR
5037 /* allocate IRQ only if board has an IRQ */
5038 if( (cy_pci_irq != 0) && (cy_pci_irq != 255) ) {
5039 if(request_irq(cy_pci_irq, cyz_interrupt,
5040 IRQF_SHARED, "Cyclades-Z", &cy_card[j]))
5041 {
5042 printk("Cyclom-Ze/PCI found at 0x%lx ",
5043 (ulong) cy_pci_phys2);
5044 printk("but could not allocate IRQ%d.\n",
5045 cy_pci_irq);
5046 return(i);
5047 }
5048 }
5049 #endif /* CONFIG_CYZ_INTR */
5050
5051 /* set cy_card */
5052 cy_card[j].base_phys = cy_pci_phys2;
5053 cy_card[j].ctl_phys = cy_pci_phys0;
5054 cy_card[j].base_addr = cy_pci_addr2;
5055 cy_card[j].ctl_addr = cy_pci_addr0;
5056 cy_card[j].irq = (int) cy_pci_irq;
5057 cy_card[j].bus_index = 1;
5058 cy_card[j].first_line = cy_next_channel;
5059 cy_card[j].num_chips = -1;
5060 cy_card[j].pdev = pdev;
5061
5062 /* print message */
5063 #ifdef CONFIG_CYZ_INTR
5064 /* don't report IRQ if board is no IRQ */
5065 if( (cy_pci_irq != 0) && (cy_pci_irq != 255) )
5066 printk("Cyclades-Ze/PCI #%d: 0x%lx-0x%lx, IRQ%d, ",
5067 j+1,(ulong)cy_pci_phys2,
5068 (ulong)(cy_pci_phys2 + CyPCI_Ze_win - 1),
5069 (int)cy_pci_irq);
5070 else
5071 #endif /* CONFIG_CYZ_INTR */
5072 printk("Cyclades-Ze/PCI #%d: 0x%lx-0x%lx, ",
5073 j+1,(ulong)cy_pci_phys2,
5074 (ulong)(cy_pci_phys2 + CyPCI_Ze_win - 1));
5075
5076 printk("%d channels starting from port %d.\n",
5077 cy_pci_nchan,cy_next_channel);
5078 cy_next_channel += cy_pci_nchan;
5079 }
5080 if (ZeIndex != 0) {
5081 printk("Cyclades-Ze/PCI found at 0x%x ",
5082 (unsigned int) Ze_phys2[0]);
5083 printk("but no more cards can be used.\n");
5084 printk("Change NR_CARDS in cyclades.c and recompile kernel.\n");
5085 }
5086 return(i);
5087 #else
5088 return(0);
5089 #endif /* ifdef CONFIG_PCI */
5090 } /* cy_detect_pci */
5091
5092
5093 /*
5094 * This routine prints out the appropriate serial driver version number
5095 * and identifies which options were configured into this driver.
5096 */
5097 static inline void
5098 show_version(void)
5099 {
5100 char *rcsvers, *rcsdate, *tmp;
5101 rcsvers = strchr(rcsid, ' '); rcsvers++;
5102 tmp = strchr(rcsvers, ' '); *tmp++ = '\0';
5103 rcsdate = strchr(tmp, ' '); rcsdate++;
5104 tmp = strrchr(rcsdate, ' '); *tmp = '\0';
5105 printk("Cyclades driver %s %s\n",
5106 rcsvers, rcsdate);
5107 printk(" built %s %s\n",
5108 __DATE__, __TIME__);
5109 } /* show_version */
5110
5111 static int
5112 cyclades_get_proc_info(char *buf, char **start, off_t offset, int length,
5113 int *eof, void *data)
5114 {
5115 struct cyclades_port *info;
5116 int i;
5117 int len=0;
5118 off_t begin=0;
5119 off_t pos=0;
5120 int size;
5121 __u32 cur_jifs = jiffies;
5122
5123 size = sprintf(buf, "Dev TimeOpen BytesOut IdleOut BytesIn IdleIn Overruns Ldisc\n");
5124
5125 pos += size;
5126 len += size;
5127
5128 /* Output one line for each known port */
5129 for (i = 0; i < NR_PORTS && cy_port[i].line >= 0; i++) {
5130 info = &cy_port[i];
5131
5132 if (info->count)
5133 size = sprintf(buf+len,
5134 "%3d %8lu %10lu %8lu %10lu %8lu %9lu %6ld\n",
5135 info->line,
5136 JIFFIES_DIFF(info->idle_stats.in_use, cur_jifs) / HZ,
5137 info->idle_stats.xmit_bytes,
5138 JIFFIES_DIFF(info->idle_stats.xmit_idle, cur_jifs) / HZ,
5139 info->idle_stats.recv_bytes,
5140 JIFFIES_DIFF(info->idle_stats.recv_idle, cur_jifs) / HZ,
5141 info->idle_stats.overruns,
5142 (long) info->tty->ldisc.num);
5143 else
5144 size = sprintf(buf+len,
5145 "%3d %8lu %10lu %8lu %10lu %8lu %9lu %6ld\n",
5146 info->line, 0L, 0L, 0L, 0L, 0L, 0L, 0L);
5147 len += size;
5148 pos = begin + len;
5149
5150 if (pos < offset) {
5151 len = 0;
5152 begin = pos;
5153 }
5154 if (pos > offset + length)
5155 goto done;
5156 }
5157 *eof = 1;
5158 done:
5159 *start = buf + (offset - begin); /* Start of wanted data */
5160 len -= (offset - begin); /* Start slop */
5161 if (len > length)
5162 len = length; /* Ending slop */
5163 if (len < 0)
5164 len = 0;
5165 return len;
5166 }
5167
5168 /* The serial driver boot-time initialization code!
5169 Hardware I/O ports are mapped to character special devices on a
5170 first found, first allocated manner. That is, this code searches
5171 for Cyclom cards in the system. As each is found, it is probed
5172 to discover how many chips (and thus how many ports) are present.
5173 These ports are mapped to the tty ports 32 and upward in monotonic
5174 fashion. If an 8-port card is replaced with a 16-port card, the
5175 port mapping on a following card will shift.
5176
5177 This approach is different from what is used in the other serial
5178 device driver because the Cyclom is more properly a multiplexer,
5179 not just an aggregation of serial ports on one card.
5180
5181 If there are more cards with more ports than have been
5182 statically allocated above, a warning is printed and the
5183 extra ports are ignored.
5184 */
5185
5186 static const struct tty_operations cy_ops = {
5187 .open = cy_open,
5188 .close = cy_close,
5189 .write = cy_write,
5190 .put_char = cy_put_char,
5191 .flush_chars = cy_flush_chars,
5192 .write_room = cy_write_room,
5193 .chars_in_buffer = cy_chars_in_buffer,
5194 .flush_buffer = cy_flush_buffer,
5195 .ioctl = cy_ioctl,
5196 .throttle = cy_throttle,
5197 .unthrottle = cy_unthrottle,
5198 .set_termios = cy_set_termios,
5199 .stop = cy_stop,
5200 .start = cy_start,
5201 .hangup = cy_hangup,
5202 .break_ctl = cy_break,
5203 .wait_until_sent = cy_wait_until_sent,
5204 .read_proc = cyclades_get_proc_info,
5205 .tiocmget = cy_tiocmget,
5206 .tiocmset = cy_tiocmset,
5207 };
5208
5209 static int __init
5210 cy_init(void)
5211 {
5212 struct cyclades_port *info;
5213 struct cyclades_card *cinfo;
5214 int number_z_boards = 0;
5215 int board,port,i,index;
5216 unsigned long mailbox;
5217 unsigned short chip_number;
5218 int nports;
5219
5220 cy_serial_driver = alloc_tty_driver(NR_PORTS);
5221 if (!cy_serial_driver)
5222 return -ENOMEM;
5223 show_version();
5224
5225 /* Initialize the tty_driver structure */
5226
5227 cy_serial_driver->owner = THIS_MODULE;
5228 cy_serial_driver->driver_name = "cyclades";
5229 cy_serial_driver->name = "ttyC";
5230 cy_serial_driver->major = CYCLADES_MAJOR;
5231 cy_serial_driver->minor_start = 0;
5232 cy_serial_driver->type = TTY_DRIVER_TYPE_SERIAL;
5233 cy_serial_driver->subtype = SERIAL_TYPE_NORMAL;
5234 cy_serial_driver->init_termios = tty_std_termios;
5235 cy_serial_driver->init_termios.c_cflag =
5236 B9600 | CS8 | CREAD | HUPCL | CLOCAL;
5237 cy_serial_driver->flags = TTY_DRIVER_REAL_RAW;
5238 tty_set_operations(cy_serial_driver, &cy_ops);
5239
5240 if (tty_register_driver(cy_serial_driver))
5241 panic("Couldn't register Cyclades serial driver\n");
5242
5243 for (i = 0; i < NR_CARDS; i++) {
5244 /* base_addr=0 indicates board not found */
5245 cy_card[i].base_addr = NULL;
5246 }
5247
5248 /* the code below is responsible to find the boards. Each different
5249 type of board has its own detection routine. If a board is found,
5250 the next cy_card structure available is set by the detection
5251 routine. These functions are responsible for checking the
5252 availability of cy_card and cy_port data structures and updating
5253 the cy_next_channel. */
5254
5255 /* look for isa boards */
5256 cy_isa_nboard = cy_detect_isa();
5257
5258 /* look for pci boards */
5259 cy_pci_nboard = cy_detect_pci();
5260
5261 cy_nboard = cy_isa_nboard + cy_pci_nboard;
5262
5263 /* invalidate remaining cy_card structures */
5264 for (i = 0 ; i < NR_CARDS ; i++) {
5265 if (cy_card[i].base_addr == 0) {
5266 cy_card[i].first_line = -1;
5267 cy_card[i].ctl_addr = NULL;
5268 cy_card[i].irq = 0;
5269 cy_card[i].bus_index = 0;
5270 cy_card[i].first_line = 0;
5271 cy_card[i].num_chips = 0;
5272 }
5273 }
5274 /* invalidate remaining cy_port structures */
5275 for (i = cy_next_channel ; i < NR_PORTS ; i++) {
5276 cy_port[i].line = -1;
5277 cy_port[i].magic = -1;
5278 }
5279
5280 /* initialize per-port data structures for each valid board found */
5281 for (board = 0 ; board < cy_nboard ; board++) {
5282 cinfo = &cy_card[board];
5283 if (cinfo->num_chips == -1) { /* Cyclades-Z */
5284 number_z_boards++;
5285 mailbox = cy_readl(&((struct RUNTIME_9060 __iomem *)
5286 cy_card[board].ctl_addr)->mail_box_0);
5287 nports = (mailbox == ZE_V1) ? ZE_V1_NPORTS : 8;
5288 cinfo->intr_enabled = 0;
5289 cinfo->nports = 0; /* Will be correctly set later, after
5290 Z FW is loaded */
5291 spin_lock_init(&cinfo->card_lock);
5292 for (port = cinfo->first_line ;
5293 port < cinfo->first_line + nports;
5294 port++)
5295 {
5296 info = &cy_port[port];
5297 info->magic = CYCLADES_MAGIC;
5298 info->type = PORT_STARTECH;
5299 info->card = board;
5300 info->line = port;
5301 info->chip_rev = 0;
5302 info->flags = STD_COM_FLAGS;
5303 info->tty = NULL;
5304 if (mailbox == ZO_V1)
5305 info->xmit_fifo_size = CYZ_FIFO_SIZE;
5306 else
5307 info->xmit_fifo_size = 4 * CYZ_FIFO_SIZE;
5308 info->cor1 = 0;
5309 info->cor2 = 0;
5310 info->cor3 = 0;
5311 info->cor4 = 0;
5312 info->cor5 = 0;
5313 info->tbpr = 0;
5314 info->tco = 0;
5315 info->rbpr = 0;
5316 info->rco = 0;
5317 info->custom_divisor = 0;
5318 info->close_delay = 5*HZ/10;
5319 info->closing_wait = CLOSING_WAIT_DELAY;
5320 info->icount.cts = info->icount.dsr =
5321 info->icount.rng = info->icount.dcd = 0;
5322 info->icount.rx = info->icount.tx = 0;
5323 info->icount.frame = info->icount.parity = 0;
5324 info->icount.overrun = info->icount.brk = 0;
5325 info->x_char = 0;
5326 info->event = 0;
5327 info->count = 0;
5328 info->blocked_open = 0;
5329 info->default_threshold = 0;
5330 info->default_timeout = 0;
5331 INIT_WORK(&info->tqueue, do_softint, info);
5332 init_waitqueue_head(&info->open_wait);
5333 init_waitqueue_head(&info->close_wait);
5334 init_waitqueue_head(&info->shutdown_wait);
5335 init_waitqueue_head(&info->delta_msr_wait);
5336 /* info->session */
5337 /* info->pgrp */
5338 info->read_status_mask = 0;
5339 /* info->timeout */
5340 /* Bentson's vars */
5341 info->jiffies[0] = 0;
5342 info->jiffies[1] = 0;
5343 info->jiffies[2] = 0;
5344 info->rflush_count = 0;
5345 #ifdef CONFIG_CYZ_INTR
5346 init_timer(&cyz_rx_full_timer[port]);
5347 cyz_rx_full_timer[port].function = NULL;
5348 #endif
5349 }
5350 continue;
5351 }else{ /* Cyclom-Y of some kind*/
5352 index = cinfo->bus_index;
5353 spin_lock_init(&cinfo->card_lock);
5354 cinfo->nports = CyPORTS_PER_CHIP * cinfo->num_chips;
5355 for (port = cinfo->first_line ;
5356 port < cinfo->first_line + cinfo->nports ;
5357 port++)
5358 {
5359 info = &cy_port[port];
5360 info->magic = CYCLADES_MAGIC;
5361 info->type = PORT_CIRRUS;
5362 info->card = board;
5363 info->line = port;
5364 info->flags = STD_COM_FLAGS;
5365 info->tty = NULL;
5366 info->xmit_fifo_size = CyMAX_CHAR_FIFO;
5367 info->cor1 = CyPARITY_NONE|Cy_1_STOP|Cy_8_BITS;
5368 info->cor2 = CyETC;
5369 info->cor3 = 0x08; /* _very_ small rcv threshold */
5370 info->cor4 = 0;
5371 info->cor5 = 0;
5372 info->custom_divisor = 0;
5373 info->close_delay = 5*HZ/10;
5374 info->closing_wait = CLOSING_WAIT_DELAY;
5375 info->icount.cts = info->icount.dsr =
5376 info->icount.rng = info->icount.dcd = 0;
5377 info->icount.rx = info->icount.tx = 0;
5378 info->icount.frame = info->icount.parity = 0;
5379 info->icount.overrun = info->icount.brk = 0;
5380 chip_number = (port - cinfo->first_line) / 4;
5381 if ((info->chip_rev =
5382 cy_readb(cinfo->base_addr +
5383 (cy_chip_offset[chip_number]<<index) +
5384 (CyGFRCR<<index))) >= CD1400_REV_J) {
5385 /* It is a CD1400 rev. J or later */
5386 info->tbpr = baud_bpr_60[13]; /* Tx BPR */
5387 info->tco = baud_co_60[13]; /* Tx CO */
5388 info->rbpr = baud_bpr_60[13]; /* Rx BPR */
5389 info->rco = baud_co_60[13]; /* Rx CO */
5390 info->rflow = 0;
5391 info->rtsdtr_inv = 1;
5392 } else {
5393 info->tbpr = baud_bpr_25[13]; /* Tx BPR */
5394 info->tco = baud_co_25[13]; /* Tx CO */
5395 info->rbpr = baud_bpr_25[13]; /* Rx BPR */
5396 info->rco = baud_co_25[13]; /* Rx CO */
5397 info->rflow = 0;
5398 info->rtsdtr_inv = 0;
5399 }
5400 info->x_char = 0;
5401 info->event = 0;
5402 info->count = 0;
5403 info->blocked_open = 0;
5404 info->default_threshold = 0;
5405 info->default_timeout = 0;
5406 INIT_WORK(&info->tqueue, do_softint, info);
5407 init_waitqueue_head(&info->open_wait);
5408 init_waitqueue_head(&info->close_wait);
5409 init_waitqueue_head(&info->shutdown_wait);
5410 init_waitqueue_head(&info->delta_msr_wait);
5411 /* info->session */
5412 /* info->pgrp */
5413 info->read_status_mask =
5414 CyTIMEOUT| CySPECHAR| CyBREAK
5415 | CyPARITY| CyFRAME| CyOVERRUN;
5416 /* info->timeout */
5417 }
5418 }
5419 }
5420
5421 #ifndef CONFIG_CYZ_INTR
5422 if (number_z_boards && !cyz_timeron){
5423 cyz_timeron++;
5424 cyz_timerlist.expires = jiffies + 1;
5425 add_timer(&cyz_timerlist);
5426 #ifdef CY_PCI_DEBUG
5427 printk("Cyclades-Z polling initialized\n");
5428 #endif
5429 }
5430 #endif /* CONFIG_CYZ_INTR */
5431
5432 return 0;
5433
5434 } /* cy_init */
5435
5436 static void __exit
5437 cy_cleanup_module(void)
5438 {
5439 int i, e1;
5440
5441 #ifndef CONFIG_CYZ_INTR
5442 if (cyz_timeron){
5443 cyz_timeron = 0;
5444 del_timer(&cyz_timerlist);
5445 }
5446 #endif /* CONFIG_CYZ_INTR */
5447
5448 if ((e1 = tty_unregister_driver(cy_serial_driver)))
5449 printk("cyc: failed to unregister Cyclades serial driver(%d)\n",
5450 e1);
5451
5452 put_tty_driver(cy_serial_driver);
5453
5454 for (i = 0; i < NR_CARDS; i++) {
5455 if (cy_card[i].base_addr) {
5456 iounmap(cy_card[i].base_addr);
5457 if (cy_card[i].ctl_addr)
5458 iounmap(cy_card[i].ctl_addr);
5459 if (cy_card[i].irq
5460 #ifndef CONFIG_CYZ_INTR
5461 && cy_card[i].num_chips != -1 /* not a Z card */
5462 #endif /* CONFIG_CYZ_INTR */
5463 )
5464 free_irq(cy_card[i].irq, &cy_card[i]);
5465 #ifdef CONFIG_PCI
5466 if (cy_card[i].pdev)
5467 pci_release_regions(cy_card[i].pdev);
5468 #endif
5469 }
5470 }
5471 } /* cy_cleanup_module */
5472
5473 module_init(cy_init);
5474 module_exit(cy_cleanup_module);
5475
5476 MODULE_LICENSE("GPL");
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