3 #undef Z_EXT_CHARS_IN_BUFFER
6 * linux/drivers/char/cyclades.c
8 * This file contains the driver for the Cyclades async multiport
11 * Initially written by Randolph Bentson <bentson@grieg.seaslug.org>.
12 * Modified and maintained by Marcio Saito <marcio@cyclades.com>.
14 * Copyright (C) 2007 Jiri Slaby <jirislaby@gmail.com>
16 * Much of the design and some of the code came from serial.c
17 * which was copyright (C) 1991, 1992 Linus Torvalds. It was
18 * extensively rewritten by Theodore Ts'o, 8/16/92 -- 9/14/92,
19 * and then fixed as suggested by Michael K. Johnson 12/12/92.
20 * Converted to pci probing and cleaned up by Jiri Slaby.
22 * This version supports shared IRQ's (only for PCI boards).
24 * Prevent users from opening non-existing Z ports.
26 * Revision 2.3.2.8 2000/07/06 18:14:16 ivan
27 * Fixed the PCI detection function to work properly on Alpha systems.
28 * Implemented support for TIOCSERGETLSR ioctl.
29 * Implemented full support for non-standard baud rates.
31 * Revision 2.3.2.7 2000/06/01 18:26:34 ivan
32 * Request PLX I/O region, although driver doesn't use it, to avoid
33 * problems with other drivers accessing it.
34 * Removed count for on-board buffer characters in cy_chars_in_buffer
37 * Revision 2.3.2.6 2000/05/05 13:56:05 ivan
38 * Driver now reports physical instead of virtual memory addresses.
39 * Masks were added to some Cyclades-Z read accesses.
40 * Implemented workaround for PLX9050 bug that would cause a system lockup
41 * in certain systems, depending on the MMIO addresses allocated to the
43 * Changed the Tx interrupt programming in the CD1400 chips to boost up
44 * performance (Cyclom-Y only).
45 * Code is now compliant with the new module interface (module_[init|exit]).
46 * Make use of the PCI helper functions to access PCI resources.
47 * Did some code "housekeeping".
49 * Revision 2.3.2.5 2000/01/19 14:35:33 ivan
50 * Fixed bug in cy_set_termios on CRTSCTS flag turnoff.
52 * Revision 2.3.2.4 2000/01/17 09:19:40 ivan
53 * Fixed SMP locking in Cyclom-Y interrupt handler.
55 * Revision 2.3.2.3 1999/12/28 12:11:39 ivan
56 * Added a new cyclades_card field called nports to allow the driver to
57 * know the exact number of ports found by the Z firmware after its load;
58 * RX buffer contention prevention logic on interrupt op mode revisited
60 * Revisited printk's for Z debug;
61 * Driver now makes sure that the constant SERIAL_XMIT_SIZE is defined;
63 * Revision 2.3.2.2 1999/10/01 11:27:43 ivan
64 * Fixed bug in cyz_poll that would make all ports but port 0
65 * unable to transmit/receive data (Cyclades-Z only);
66 * Implemented logic to prevent the RX buffer from being stuck with data
67 * due to a driver / firmware race condition in interrupt op mode
69 * Fixed bug in block_til_ready logic that would lead to a system crash;
70 * Revisited cy_close spinlock usage;
72 * Revision 2.3.2.1 1999/09/28 11:01:22 ivan
73 * Revisited CONFIG_PCI conditional compilation for PCI board support;
74 * Implemented TIOCGICOUNT and TIOCMIWAIT ioctl support;
75 * _Major_ cleanup on the Cyclades-Z interrupt support code / logic;
76 * Removed CTS handling from the driver -- this is now completely handled
77 * by the firmware (Cyclades-Z only);
78 * Flush RX on-board buffers on a port open (Cyclades-Z only);
79 * Fixed handling of ASYNC_SPD_* TTY flags;
80 * Module unload now unmaps all memory area allocated by ioremap;
82 * Revision 2.3.1.1 1999/07/15 16:45:53 ivan
83 * Removed CY_PROC conditional compilation;
84 * Implemented SMP-awareness for the driver;
85 * Implemented a new ISA IRQ autoprobe that uses the irq_probe_[on|off]
87 * The driver now accepts memory addresses (maddr=0xMMMMM) and IRQs
88 * (irq=NN) as parameters (only for ISA boards);
89 * Fixed bug in set_line_char that would prevent the Cyclades-Z
90 * ports from being configured at speeds above 115.2Kbps;
91 * Fixed bug in cy_set_termios that would prevent XON/XOFF flow control
92 * switching from working properly;
93 * The driver now only prints IRQ info for the Cyclades-Z if it's
94 * configured to work in interrupt mode;
96 * Revision 2.2.2.3 1999/06/28 11:13:29 ivan
97 * Added support for interrupt mode operation for the Z cards;
98 * Removed the driver inactivity control for the Z;
99 * Added a missing MOD_DEC_USE_COUNT in the cy_open function for when
100 * the Z firmware is not loaded yet;
101 * Replaced the "manual" Z Tx flush buffer by a call to a FW command of
102 * same functionality;
103 * Implemented workaround for IRQ setting loss on the PCI configuration
104 * registers after a PCI bridge EEPROM reload (affects PLX9060 only);
106 * Revision 2.2.2.2 1999/05/14 17:18:15 ivan
107 * /proc entry location changed to /proc/tty/driver/cyclades;
108 * Added support to shared IRQ's (only for PCI boards);
109 * Added support for Cobalt Qube2 systems;
110 * IRQ [de]allocation scheme revisited;
111 * BREAK implementation changed in order to make use of the 'break_ctl'
113 * Fixed typo in TTY structure field 'driver_name';
114 * Included a PCI bridge reset and EEPROM reload in the board
115 * initialization code (for both Y and Z series).
117 * Revision 2.2.2.1 1999/04/08 16:17:43 ivan
118 * Fixed a bug in cy_wait_until_sent that was preventing the port to be
119 * closed properly after a SIGINT;
120 * Module usage counter scheme revisited;
121 * Added support to the upcoming Y PCI boards (i.e., support to additional
124 * Revision 2.2.1.10 1999/01/20 16:14:29 ivan
125 * Removed all unnecessary page-alignement operations in ioremap calls
126 * (ioremap is currently safe for these operations).
128 * Revision 2.2.1.9 1998/12/30 18:18:30 ivan
129 * Changed access to PLX PCI bridge registers from I/O to MMIO, in
130 * order to make PLX9050-based boards work with certain motherboards.
132 * Revision 2.2.1.8 1998/11/13 12:46:20 ivan
133 * cy_close function now resets (correctly) the tty->closing flag;
134 * JIFFIES_DIFF macro fixed.
136 * Revision 2.2.1.7 1998/09/03 12:07:28 ivan
137 * Fixed bug in cy_close function, which was not informing HW of
138 * which port should have the reception disabled before doing so;
139 * fixed Cyclom-8YoP hardware detection bug.
141 * Revision 2.2.1.6 1998/08/20 17:15:39 ivan
142 * Fixed bug in cy_close function, which causes malfunction
143 * of one of the first 4 ports when a higher port is closed
146 * Revision 2.2.1.5 1998/08/10 18:10:28 ivan
147 * Fixed Cyclom-4Yo hardware detection bug.
149 * Revision 2.2.1.4 1998/08/04 11:02:50 ivan
150 * /proc/cyclades implementation with great collaboration of
151 * Marc Lewis <marc@blarg.net>;
152 * cyy_interrupt was changed to avoid occurrence of kernel oopses
153 * during PPP operation.
155 * Revision 2.2.1.3 1998/06/01 12:09:10 ivan
156 * General code review in order to comply with 2.1 kernel standards;
157 * data loss prevention for slow devices revisited (cy_wait_until_sent
159 * removed conditional compilation for new/old PCI structure support
160 * (now the driver only supports the new PCI structure).
162 * Revision 2.2.1.1 1998/03/19 16:43:12 ivan
163 * added conditional compilation for new/old PCI structure support;
164 * removed kernel series (2.0.x / 2.1.x) conditional compilation.
166 * Revision 2.1.1.3 1998/03/16 18:01:12 ivan
167 * cleaned up the data loss fix;
168 * fixed XON/XOFF handling once more (Cyclades-Z);
169 * general review of the driver routines;
170 * introduction of a mechanism to prevent data loss with slow
171 * printers, by forcing a delay before closing the port.
173 * Revision 2.1.1.2 1998/02/17 16:50:00 ivan
174 * fixed detection/handling of new CD1400 in Ye boards;
175 * fixed XON/XOFF handling (Cyclades-Z);
176 * fixed data loss caused by a premature port close;
177 * introduction of a flag that holds the CD1400 version ID per port
178 * (used by the CYGETCD1400VER new ioctl).
180 * Revision 2.1.1.1 1997/12/03 17:31:19 ivan
181 * Code review for the module cleanup routine;
182 * fixed RTS and DTR status report for new CD1400's in get_modem_info;
183 * includes anonymous changes regarding signal_pending.
185 * Revision 2.1 1997/11/01 17:42:41 ivan
186 * Changes in the driver to support Alpha systems (except 8Zo V_1);
187 * BREAK fix for the Cyclades-Z boards;
188 * driver inactivity control by FW implemented;
189 * introduction of flag that allows driver to take advantage of
190 * a special CD1400 feature related to HW flow control;
191 * added support for the CD1400 rev. J (Cyclom-Y boards);
192 * introduction of ioctls to:
193 * - control the rtsdtr_inv flag (Cyclom-Y);
194 * - control the rflow flag (Cyclom-Y);
195 * - adjust the polling interval (Cyclades-Z);
197 * Revision 1.36.4.33 1997/06/27 19:00:00 ivan
198 * Fixes related to kernel version conditional
201 * Revision 1.36.4.32 1997/06/14 19:30:00 ivan
202 * Compatibility issues between kernels 2.0.x and
203 * 2.1.x (mainly related to clear_bit function).
205 * Revision 1.36.4.31 1997/06/03 15:30:00 ivan
206 * Changes to define the memory window according to the
209 * Revision 1.36.4.30 1997/05/16 15:30:00 daniel
210 * Changes to support new cycladesZ boards.
212 * Revision 1.36.4.29 1997/05/12 11:30:00 daniel
213 * Merge of Bentson's and Daniel's version 1.36.4.28.
214 * Corrects bug in cy_detect_pci: check if there are more
215 * ports than the number of static structs allocated.
216 * Warning message during initialization if this driver is
217 * used with the new generation of cycladesZ boards. Those
218 * will be supported only in next release of the driver.
219 * Corrects bug in cy_detect_pci and cy_detect_isa that
220 * returned wrong number of VALID boards, when a cyclomY
221 * was found with no serial modules connected.
222 * Changes to use current (2.1.x) kernel subroutine names
223 * and created macros for compilation with 2.0.x kernel,
224 * instead of the other way around.
226 * Revision 1.36.4.28 1997/05/?? ??:00:00 bentson
227 * Change queue_task_irq_off to queue_task_irq.
228 * The inline function queue_task_irq_off (tqueue.h)
229 * was removed from latest releases of 2.1.x kernel.
230 * Use of macro __init to mark the initialization
231 * routines, so memory can be reused.
232 * Also incorporate implementation of critical region
233 * in function cleanup_module() created by anonymous
236 * Revision 1.36.4.28 1997/04/25 16:00:00 daniel
237 * Change to support new firmware that solves DCD problem:
238 * application could fail to receive SIGHUP signal when DCD
241 * Revision 1.36.4.27 1997/03/26 10:30:00 daniel
242 * Changed for support linux versions 2.1.X.
243 * Backward compatible with linux versions 2.0.X.
244 * Corrected illegal use of filler field in
246 * Deleted some debug messages.
248 * Revision 1.36.4.26 1997/02/27 12:00:00 daniel
249 * Included check for NULL tty pointer in cyz_poll.
251 * Revision 1.36.4.25 1997/02/26 16:28:30 bentson
252 * Bill Foster at Blarg! Online services noticed that
253 * some of the switch elements of -Z modem control
254 * lacked a closing "break;"
256 * Revision 1.36.4.24 1997/02/24 11:00:00 daniel
257 * Changed low water threshold for buffer xmit_buf
259 * Revision 1.36.4.23 1996/12/02 21:50:16 bentson
260 * Marcio provided fix to modem status fetch for -Z
262 * Revision 1.36.4.22 1996/10/28 22:41:17 bentson
263 * improve mapping of -Z control page (thanks to Steve
264 * Price <stevep@fa.tdktca.com> for help on this)
266 * Revision 1.36.4.21 1996/09/10 17:00:10 bentson
267 * shift from CPU-bound to memcopy in cyz_polling operation
269 * Revision 1.36.4.20 1996/09/09 18:30:32 Bentson
270 * Added support to set and report higher speeds.
272 * Revision 1.36.4.19c 1996/08/09 10:00:00 Marcio Saito
273 * Some fixes in the HW flow control for the BETA release.
274 * Don't try to register the IRQ.
276 * Revision 1.36.4.19 1996/08/08 16:23:18 Bentson
277 * make sure "cyc" appears in all kernel messages; all soft interrupts
278 * handled by same routine; recognize out-of-band reception; comment
279 * out some diagnostic messages; leave RTS/CTS flow control to hardware;
280 * fix race condition in -Z buffer management; only -Y needs to explicitly
281 * flush chars; tidy up some startup messages;
283 * Revision 1.36.4.18 1996/07/25 18:57:31 bentson
284 * shift MOD_INC_USE_COUNT location to match
285 * serial.c; purge some diagnostic messages;
287 * Revision 1.36.4.17 1996/07/25 18:01:08 bentson
288 * enable modem status messages and fetch & process them; note
289 * time of last activity type for each port; set_line_char now
290 * supports more than line 0 and treats 0 baud correctly;
291 * get_modem_info senses rs_status;
293 * Revision 1.36.4.16 1996/07/20 08:43:15 bentson
294 * barely works--now's time to turn on
295 * more features 'til it breaks
297 * Revision 1.36.4.15 1996/07/19 22:30:06 bentson
298 * check more -Z board status; shorten boot message
300 * Revision 1.36.4.14 1996/07/19 22:20:37 bentson
301 * fix reference to ch_ctrl in startup; verify return
302 * values from cyz_issue_cmd and cyz_update_channel;
303 * more stuff to get modem control correct;
305 * Revision 1.36.4.13 1996/07/11 19:53:33 bentson
306 * more -Z stuff folded in; re-order changes to put -Z stuff
307 * after -Y stuff (to make changes clearer)
309 * Revision 1.36.4.12 1996/07/11 15:40:55 bentson
310 * Add code to poll Cyclades-Z. Add code to get & set RS-232 control.
311 * Add code to send break. Clear firmware ID word at startup (so
312 * that other code won't talk to inactive board).
314 * Revision 1.36.4.11 1996/07/09 05:28:29 bentson
315 * add code for -Z in set_line_char
317 * Revision 1.36.4.10 1996/07/08 19:28:37 bentson
318 * fold more -Z stuff (or in some cases, error messages)
319 * into driver; add text to "don't know what to do" messages.
321 * Revision 1.36.4.9 1996/07/08 18:38:38 bentson
322 * moved compile-time flags near top of file; cosmetic changes
323 * to narrow text (to allow 2-up printing); changed many declarations
324 * to "static" to limit external symbols; shuffled code order to
325 * coalesce -Y and -Z specific code, also to put internal functions
326 * in order of tty_driver structure; added code to recognize -Z
327 * ports (and for moment, do nothing or report error); add cy_startup
328 * to parse boot command line for extra base addresses for ISA probes;
330 * Revision 1.36.4.8 1996/06/25 17:40:19 bentson
331 * reorder some code, fix types of some vars (int vs. long),
332 * add cy_setup to support user declared ISA addresses
334 * Revision 1.36.4.7 1996/06/21 23:06:18 bentson
335 * dump ioctl based firmware load (it's now a user level
336 * program); ensure uninitialzed ports cannot be used
338 * Revision 1.36.4.6 1996/06/20 23:17:19 bentson
339 * rename vars and restructure some code
341 * Revision 1.36.4.5 1996/06/14 15:09:44 bentson
342 * get right status back after boot load
344 * Revision 1.36.4.4 1996/06/13 19:51:44 bentson
345 * successfully loads firmware
347 * Revision 1.36.4.3 1996/06/13 06:08:33 bentson
348 * add more of the code for the boot/load ioctls
350 * Revision 1.36.4.2 1996/06/11 21:00:51 bentson
351 * start to add Z functionality--starting with ioctl
352 * for loading firmware
354 * Revision 1.36.4.1 1996/06/10 18:03:02 bentson
355 * added code to recognize Z/PCI card at initialization; report
356 * presence, but card is not initialized (because firmware needs
359 * Revision 1.36.3.8 1996/06/07 16:29:00 bentson
360 * starting minor number at zero; added missing verify_area
361 * as noted by Heiko Eißfeldt <heiko@colossus.escape.de>
363 * Revision 1.36.3.7 1996/04/19 21:06:18 bentson
364 * remove unneeded boot message & fix CLOCAL hardware flow
365 * control (Miquel van Smoorenburg <miquels@Q.cistron.nl>);
366 * remove unused diagnostic statements; minor 0 is first;
368 * Revision 1.36.3.6 1996/03/13 13:21:17 marcio
369 * The kernel function vremap (available only in later 1.3.xx kernels)
370 * allows the access to memory addresses above the RAM. This revision
371 * of the driver supports PCI boards below 1Mb (device id 0x100) and
372 * above 1Mb (device id 0x101).
374 * Revision 1.36.3.5 1996/03/07 15:20:17 bentson
375 * Some global changes to interrupt handling spilled into
376 * this driver--mostly unused arguments in system function
377 * calls. Also added change by Marcio Saito which should
378 * reduce lost interrupts at startup by fast processors.
380 * Revision 1.36.3.4 1995/11/13 20:45:10 bentson
381 * Changes by Corey Minyard <minyard@wf-rch.cirr.com> distributed
382 * in 1.3.41 kernel to remove a possible race condition, extend
383 * some error messages, and let the driver run as a loadable module
384 * Change by Alan Wendt <alan@ez0.ezlink.com> to remove a
385 * possible race condition.
386 * Change by Marcio Saito <marcio@cyclades.com> to fix PCI addressing.
388 * Revision 1.36.3.3 1995/11/13 19:44:48 bentson
389 * Changes by Linus Torvalds in 1.3.33 kernel distribution
390 * required due to reordering of driver initialization.
391 * Drivers are now initialized *after* memory management.
393 * Revision 1.36.3.2 1995/09/08 22:07:14 bentson
394 * remove printk from ISR; fix typo
396 * Revision 1.36.3.1 1995/09/01 12:00:42 marcio
397 * Minor fixes in the PCI board support. PCI function calls in
398 * conditional compilation (CONFIG_PCI). Thanks to Jim Duncan
399 * <duncan@okay.com>. "bad serial count" message removed.
401 * Revision 1.36.3 1995/08/22 09:19:42 marcio
402 * Cyclom-Y/PCI support added. Changes in the cy_init routine and
403 * board initialization. Changes in the boot messages. The driver
404 * supports up to 4 boards and 64 ports by default.
406 * Revision 1.36.1.4 1995/03/29 06:14:14 bentson
407 * disambiguate between Cyclom-16Y and Cyclom-32Ye;
409 * Revision 1.36.1.3 1995/03/23 22:15:35 bentson
410 * add missing break in modem control block in ioctl switch statement
411 * (discovered by Michael Edward Chastain <mec@jobe.shell.portal.com>);
413 * Revision 1.36.1.2 1995/03/22 19:16:22 bentson
414 * make sure CTS flow control is set as soon as possible (thanks
415 * to note from David Lambert <lambert@chesapeake.rps.slb.com>);
417 * Revision 1.36.1.1 1995/03/13 15:44:43 bentson
418 * initialize defaults for receive threshold and stale data timeout;
421 * Revision 1.36 1995/03/10 23:33:53 bentson
422 * added support of chips 4-7 in 32 port Cyclom-Ye;
423 * fix cy_interrupt pointer dereference problem
424 * (Joe Portman <baron@aa.net>);
425 * give better error response if open is attempted on non-existent port
426 * (Zachariah Vaum <jchryslr@netcom.com>);
427 * correct command timeout (Kenneth Lerman <lerman@@seltd.newnet.com>);
428 * conditional compilation for -16Y on systems with fast, noisy bus;
429 * comment out diagnostic print function;
430 * cleaned up table of base addresses;
431 * set receiver time-out period register to correct value,
432 * set receive threshold to better default values,
433 * set chip timer to more accurate 200 Hz ticking,
434 * add code to monitor and modify receive parameters
435 * (Rik Faith <faith@cs.unc.edu> Nick Simicich
436 * <njs@scifi.emi.net>);
438 * Revision 1.35 1994/12/16 13:54:18 steffen
439 * additional patch by Marcio Saito for board detection
440 * Accidently left out in 1.34
442 * Revision 1.34 1994/12/10 12:37:12 steffen
443 * This is the corrected version as suggested by Marcio Saito
445 * Revision 1.33 1994/12/01 22:41:18 bentson
446 * add hooks to support more high speeds directly; add tytso
447 * patch regarding CLOCAL wakeups
449 * Revision 1.32 1994/11/23 19:50:04 bentson
450 * allow direct kernel control of higher signalling rates;
451 * look for cards at additional locations
453 * Revision 1.31 1994/11/16 04:33:28 bentson
454 * ANOTHER fix from Corey Minyard, minyard@wf-rch.cirr.com--
455 * a problem in chars_in_buffer has been resolved by some
456 * small changes; this should yield smoother output
458 * Revision 1.30 1994/11/16 04:28:05 bentson
459 * Fix from Corey Minyard, Internet: minyard@metronet.com,
460 * UUCP: minyard@wf-rch.cirr.com, WORK: minyardbnr.ca, to
461 * cy_hangup that appears to clear up much (all?) of the
462 * DTR glitches; also he's added/cleaned-up diagnostic messages
464 * Revision 1.29 1994/11/16 04:16:07 bentson
465 * add change proposed by Ralph Sims, ralphs@halcyon.com, to
466 * operate higher speeds in same way as other serial ports;
467 * add more serial ports (for up to two 16-port muxes).
469 * Revision 1.28 1994/11/04 00:13:16 root
470 * turn off diagnostic messages
472 * Revision 1.27 1994/11/03 23:46:37 root
473 * bunch of changes to bring driver into greater conformance
474 * with the serial.c driver (looking for missed fixes)
476 * Revision 1.26 1994/11/03 22:40:36 root
477 * automatic interrupt probing fixed.
479 * Revision 1.25 1994/11/03 20:17:02 root
480 * start to implement auto-irq
482 * Revision 1.24 1994/11/03 18:01:55 root
483 * still working on modem signals--trying not to drop DTR
484 * during the getty/login processes
486 * Revision 1.23 1994/11/03 17:51:36 root
487 * extend baud rate support; set receive threshold as function
488 * of baud rate; fix some problems with RTS/CTS;
490 * Revision 1.22 1994/11/02 18:05:35 root
491 * changed arguments to udelay to type long to get
492 * delays to be of correct duration
494 * Revision 1.21 1994/11/02 17:37:30 root
495 * employ udelay (after calibrating loops_per_second earlier
496 * in init/main.c) instead of using home-grown delay routines
498 * Revision 1.20 1994/11/02 03:11:38 root
499 * cy_chars_in_buffer forces a return value of 0 to let
500 * login work (don't know why it does); some functions
501 * that were returning EFAULT, now executes the code;
502 * more work on deciding when to disable xmit interrupts;
504 * Revision 1.19 1994/11/01 20:10:14 root
505 * define routine to start transmission interrupts (by enabling
506 * transmit interrupts); directly enable/disable modem interrupts;
508 * Revision 1.18 1994/11/01 18:40:45 bentson
509 * Don't always enable transmit interrupts in startup; interrupt on
510 * TxMpty instead of TxRdy to help characters get out before shutdown;
511 * restructure xmit interrupt to check for chars first and quit if
512 * none are ready to go; modem status (MXVRx) is upright, _not_ inverted
515 * Revision 1.17 1994/10/30 04:39:45 bentson
516 * rename serial_driver and callout_driver to cy_serial_driver and
517 * cy_callout_driver to avoid linkage interference; initialize
518 * info->type to PORT_CIRRUS; ruggedize paranoia test; elide ->port
519 * from cyclades_port structure; add paranoia check to cy_close;
521 * Revision 1.16 1994/10/30 01:14:33 bentson
522 * change major numbers; add some _early_ return statements;
524 * Revision 1.15 1994/10/29 06:43:15 bentson
525 * final tidying up for clean compile; enable some error reporting
527 * Revision 1.14 1994/10/28 20:30:22 Bentson
528 * lots of changes to drag the driver towards the new tty_io
529 * structures and operation. not expected to work, but may
532 * Revision 1.13 1994/07/21 23:08:57 Bentson
533 * add some diagnostic cruft; support 24 lines (for testing
534 * both -8Y and -16Y cards; be more thorough in servicing all
535 * chips during interrupt; add "volatile" a few places to
536 * circumvent compiler optimizations; fix base & offset
537 * computations in block_til_ready (was causing chip 0 to
540 * Revision 1.12 1994/07/19 16:42:11 Bentson
541 * add some hackery for kernel version 1.1.8; expand
542 * error messages; refine timing for delay loops and
543 * declare loop params volatile
545 * Revision 1.11 1994/06/11 21:53:10 bentson
546 * get use of save_car right in transmit interrupt service
548 * Revision 1.10.1.1 1994/06/11 21:31:18 bentson
549 * add some diagnostic printing; try to fix save_car stuff
551 * Revision 1.10 1994/06/11 20:36:08 bentson
552 * clean up compiler warnings
554 * Revision 1.9 1994/06/11 19:42:46 bentson
555 * added a bunch of code to support modem signalling
557 * Revision 1.8 1994/06/11 17:57:07 bentson
558 * recognize break & parity error
560 * Revision 1.7 1994/06/05 05:51:34 bentson
561 * Reorder baud table to be monotonic; add cli to CP; discard
562 * incoming characters and status if the line isn't open; start to
563 * fold code into cy_throttle; start to port get_serial_info,
564 * set_serial_info, get_modem_info, set_modem_info, and send_break
565 * from serial.c; expand cy_ioctl; relocate and expand config_setup;
566 * get flow control characters from tty struct; invalidate ports w/o
569 * Revision 1.6 1994/05/31 18:42:21 bentson
570 * add a loop-breaker in the interrupt service routine;
571 * note when port is initialized so that it can be shut
572 * down under the right conditions; receive works without
575 * Revision 1.5 1994/05/30 00:55:02 bentson
576 * transmit works without obvious errors
578 * Revision 1.4 1994/05/27 18:46:27 bentson
579 * incorporated more code from lib_y.c; can now print short
580 * strings under interrupt control to port zero; seems to
581 * select ports/channels/lines correctly
583 * Revision 1.3 1994/05/25 22:12:44 bentson
584 * shifting from multi-port on a card to proper multiplexor
585 * data structures; added skeletons of most routines
587 * Revision 1.2 1994/05/19 13:21:43 bentson
588 * start to crib from other sources
592 #define CY_VERSION "2.5"
594 /* If you need to install more boards than NR_CARDS, change the constant
595 in the definition below. No other change is necessary to support up to
596 eight boards. Beyond that you'll have to extend cy_isa_addresses. */
601 If the total number of ports is larger than NR_PORTS, change this
602 constant in the definition below. No other change is necessary to
603 support more boards/ports. */
607 #define ZE_V1_NPORTS 64
612 #define SERIAL_PARANOIA_CHECK
614 #undef CY_DEBUG_THROTTLE
615 #undef CY_DEBUG_OTHER
617 #undef CY_DEBUG_COUNT
619 #undef CY_DEBUG_WAIT_UNTIL_SENT
620 #undef CY_DEBUG_INTERRUPTS
622 #undef CY_ENABLE_MONITORING
628 #include <linux/module.h>
629 #include <linux/errno.h>
630 #include <linux/signal.h>
631 #include <linux/sched.h>
632 #include <linux/timer.h>
633 #include <linux/interrupt.h>
634 #include <linux/tty.h>
635 #include <linux/tty_flip.h>
636 #include <linux/serial.h>
637 #include <linux/major.h>
638 #include <linux/string.h>
639 #include <linux/fcntl.h>
640 #include <linux/ptrace.h>
641 #include <linux/cyclades.h>
642 #include <linux/mm.h>
643 #include <linux/ioport.h>
644 #include <linux/init.h>
645 #include <linux/delay.h>
646 #include <linux/spinlock.h>
647 #include <linux/bitops.h>
648 #include <linux/firmware.h>
649 #include <linux/device.h>
651 #include <asm/system.h>
652 #include <linux/io.h>
654 #include <linux/uaccess.h>
656 #include <linux/kernel.h>
657 #include <linux/pci.h>
659 #include <linux/stat.h>
660 #include <linux/proc_fs.h>
661 #include <linux/seq_file.h>
663 static void cy_throttle(struct tty_struct *tty);
664 static void cy_send_xchar(struct tty_struct *tty, char ch);
666 #ifndef SERIAL_XMIT_SIZE
667 #define SERIAL_XMIT_SIZE (min(PAGE_SIZE, 4096))
669 #define WAKEUP_CHARS 256
671 #define STD_COM_FLAGS (0)
674 #define ZL_MAX_BLOCKS 16
675 #define DRIVER_VERSION 0x02010203
676 #define RAM_SIZE 0x80000
683 struct zfile_header {
692 } __attribute__ ((packed));
694 struct zfile_config {
699 u32 block_list[ZL_MAX_BLOCKS];
700 } __attribute__ ((packed));
707 } __attribute__ ((packed));
709 static struct tty_driver *cy_serial_driver;
712 /* This is the address lookup table. The driver will probe for
713 Cyclom-Y/ISA boards at all addresses in here. If you want the
714 driver to probe addresses at a different address, add it to
715 this table. If the driver is probing some other board and
716 causing problems, remove the offending address from this table.
719 static unsigned int cy_isa_addresses[] = {
728 0, 0, 0, 0, 0, 0, 0, 0
731 #define NR_ISA_ADDRS ARRAY_SIZE(cy_isa_addresses)
734 static long maddr[NR_CARDS];
735 static int irq[NR_CARDS];
737 module_param_array(maddr, long, NULL, 0);
738 module_param_array(irq, int, NULL, 0);
741 #endif /* CONFIG_ISA */
743 /* This is the per-card data structure containing address, irq, number of
744 channels, etc. This driver supports a maximum of NR_CARDS cards.
746 static struct cyclades_card cy_card[NR_CARDS];
748 static int cy_next_channel; /* next minor available */
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->port.flags.
754 * 0, 1, 2, 3, 4, 5, 6, 7, 8, 9,
755 * 10, 11, 12, 13, 14, 15, 16, 17, 18, 19,
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,
765 static char baud_co_25[] = { /* 25 MHz clock option table */
766 /* value => 00 01 02 03 04 */
767 /* divide by 8 32 128 512 2048 */
768 0x00, 0x04, 0x04, 0x04, 0x04, 0x04, 0x03, 0x03, 0x03, 0x02,
769 0x02, 0x02, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
772 static char baud_bpr_25[] = { /* 25 MHz baud rate period table */
773 0x00, 0xf5, 0xa3, 0x6f, 0x5c, 0x51, 0xf5, 0xa3, 0x51, 0xa3,
774 0x6d, 0x51, 0xa3, 0x51, 0xa3, 0x51, 0x36, 0x29, 0x1b, 0x15
777 static char baud_co_60[] = { /* 60 MHz clock option table (CD1400 J) */
778 /* value => 00 01 02 03 04 */
779 /* divide by 8 32 128 512 2048 */
780 0x00, 0x00, 0x00, 0x04, 0x04, 0x04, 0x04, 0x04, 0x03, 0x03,
781 0x03, 0x02, 0x02, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00,
785 static char baud_bpr_60[] = { /* 60 MHz baud rate period table (CD1400 J) */
786 0x00, 0x82, 0x21, 0xff, 0xdb, 0xc3, 0x92, 0x62, 0xc3, 0x62,
787 0x41, 0xc3, 0x62, 0xc3, 0x62, 0xc3, 0x82, 0x62, 0x41, 0x32,
791 static char baud_cor3[] = { /* receive threshold */
792 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a,
793 0x0a, 0x0a, 0x0a, 0x09, 0x09, 0x08, 0x08, 0x08, 0x08, 0x07,
798 * The Cyclades driver implements HW flow control as any serial driver.
799 * The cyclades_port structure member rflow and the vector rflow_thr
800 * allows us to take advantage of a special feature in the CD1400 to avoid
801 * data loss even when the system interrupt latency is too high. These flags
802 * are to be used only with very special applications. Setting these flags
803 * requires the use of a special cable (DTR and RTS reversed). In the new
804 * CD1400-based boards (rev. 6.00 or later), there is no need for special
808 static char rflow_thr[] = { /* rflow threshold */
809 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
810 0x00, 0x00, 0x00, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a,
814 /* The Cyclom-Ye has placed the sequential chips in non-sequential
815 * address order. This look-up table overcomes that problem.
817 static int cy_chip_offset[] = { 0x0000,
827 /* PCI related definitions */
830 static struct pci_device_id cy_pci_dev_id[] __devinitdata = {
832 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Y_Lo) },
834 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Y_Hi) },
836 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_4Y_Lo) },
838 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_4Y_Hi) },
840 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_8Y_Lo) },
842 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_8Y_Hi) },
844 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Z_Lo) },
846 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Z_Hi) },
847 { } /* end of table */
849 MODULE_DEVICE_TABLE(pci, cy_pci_dev_id);
852 static void cy_start(struct tty_struct *);
853 static void set_line_char(struct cyclades_port *);
854 static int cyz_issue_cmd(struct cyclades_card *, __u32, __u8, __u32);
856 static unsigned detect_isa_irq(void __iomem *);
857 #endif /* CONFIG_ISA */
859 #ifndef CONFIG_CYZ_INTR
860 static void cyz_poll(unsigned long);
862 /* The Cyclades-Z polling cycle is defined by this variable */
863 static long cyz_polling_cycle = CZ_DEF_POLL;
865 static DEFINE_TIMER(cyz_timerlist, cyz_poll, 0, 0);
867 #else /* CONFIG_CYZ_INTR */
868 static void cyz_rx_restart(unsigned long);
869 static struct timer_list cyz_rx_full_timer[NR_PORTS];
870 #endif /* CONFIG_CYZ_INTR */
872 static inline bool cy_is_Z(struct cyclades_card *card)
874 return card->num_chips == (unsigned int)-1;
877 static inline bool __cyz_fpga_loaded(struct RUNTIME_9060 __iomem *ctl_addr)
879 return readl(&ctl_addr->init_ctrl) & (1 << 17);
882 static inline bool cyz_fpga_loaded(struct cyclades_card *card)
884 return __cyz_fpga_loaded(card->ctl_addr.p9060);
887 static inline bool cyz_is_loaded(struct cyclades_card *card)
889 struct FIRM_ID __iomem *fw_id = card->base_addr + ID_ADDRESS;
891 return (card->hw_ver == ZO_V1 || cyz_fpga_loaded(card)) &&
892 readl(&fw_id->signature) == ZFIRM_ID;
895 static inline int serial_paranoia_check(struct cyclades_port *info,
896 char *name, const char *routine)
898 #ifdef SERIAL_PARANOIA_CHECK
900 printk(KERN_WARNING "cyc Warning: null cyclades_port for (%s) "
901 "in %s\n", name, routine);
905 if (info->magic != CYCLADES_MAGIC) {
906 printk(KERN_WARNING "cyc Warning: bad magic number for serial "
907 "struct (%s) in %s\n", name, routine);
912 } /* serial_paranoia_check */
914 /***********************************************************/
915 /********* Start of block of Cyclom-Y specific code ********/
917 /* This routine waits up to 1000 micro-seconds for the previous
918 command to the Cirrus chip to complete and then issues the
919 new command. An error is returned if the previous command
920 didn't finish within the time limit.
922 This function is only called from inside spinlock-protected code.
924 static int cyy_issue_cmd(void __iomem *base_addr, u_char cmd, int index)
928 /* Check to see that the previous command has completed */
929 for (i = 0; i < 100; i++) {
930 if (readb(base_addr + (CyCCR << index)) == 0)
934 /* if the CCR never cleared, the previous command
935 didn't finish within the "reasonable time" */
939 /* Issue the new command */
940 cy_writeb(base_addr + (CyCCR << index), cmd);
943 } /* cyy_issue_cmd */
946 /* ISA interrupt detection code */
947 static unsigned detect_isa_irq(void __iomem *address)
950 unsigned long irqs, flags;
951 int save_xir, save_car;
952 int index = 0; /* IRQ probing is only for ISA */
954 /* forget possible initially masked and pending IRQ */
955 irq = probe_irq_off(probe_irq_on());
957 /* Clear interrupts on the board first */
958 cy_writeb(address + (Cy_ClrIntr << index), 0);
959 /* Cy_ClrIntr is 0x1800 */
961 irqs = probe_irq_on();
965 /* Enable the Tx interrupts on the CD1400 */
966 local_irq_save(flags);
967 cy_writeb(address + (CyCAR << index), 0);
968 cyy_issue_cmd(address, CyCHAN_CTL | CyENB_XMTR, index);
970 cy_writeb(address + (CyCAR << index), 0);
971 cy_writeb(address + (CySRER << index),
972 readb(address + (CySRER << index)) | CyTxRdy);
973 local_irq_restore(flags);
978 /* Check which interrupt is in use */
979 irq = probe_irq_off(irqs);
982 save_xir = (u_char) readb(address + (CyTIR << index));
983 save_car = readb(address + (CyCAR << index));
984 cy_writeb(address + (CyCAR << index), (save_xir & 0x3));
985 cy_writeb(address + (CySRER << index),
986 readb(address + (CySRER << index)) & ~CyTxRdy);
987 cy_writeb(address + (CyTIR << index), (save_xir & 0x3f));
988 cy_writeb(address + (CyCAR << index), (save_car));
989 cy_writeb(address + (Cy_ClrIntr << index), 0);
990 /* Cy_ClrIntr is 0x1800 */
992 return (irq > 0) ? irq : 0;
994 #endif /* CONFIG_ISA */
996 static void cyy_chip_rx(struct cyclades_card *cinfo, int chip,
997 void __iomem *base_addr)
999 struct cyclades_port *info;
1000 struct tty_struct *tty;
1001 int len, index = cinfo->bus_index;
1002 u8 save_xir, channel, save_car, data, char_count;
1004 #ifdef CY_DEBUG_INTERRUPTS
1005 printk(KERN_DEBUG "cyy_interrupt: rcvd intr, chip %d\n", chip);
1007 /* determine the channel & change to that context */
1008 save_xir = readb(base_addr + (CyRIR << index));
1009 channel = save_xir & CyIRChannel;
1010 info = &cinfo->ports[channel + chip * 4];
1011 save_car = readb(base_addr + (CyCAR << index));
1012 cy_writeb(base_addr + (CyCAR << index), save_xir);
1014 /* if there is nowhere to put the data, discard it */
1015 if (info->port.tty == NULL) {
1016 if ((readb(base_addr + (CyRIVR << index)) & CyIVRMask) ==
1017 CyIVRRxEx) { /* exception */
1018 data = readb(base_addr + (CyRDSR << index));
1019 } else { /* normal character reception */
1020 char_count = readb(base_addr + (CyRDCR << index));
1021 while (char_count--)
1022 data = readb(base_addr + (CyRDSR << index));
1026 /* there is an open port for this data */
1027 tty = info->port.tty;
1028 if ((readb(base_addr + (CyRIVR << index)) & CyIVRMask) ==
1029 CyIVRRxEx) { /* exception */
1030 data = readb(base_addr + (CyRDSR << index));
1032 /* For statistics only */
1035 else if (data & CyFRAME)
1036 info->icount.frame++;
1037 else if (data & CyPARITY)
1038 info->icount.parity++;
1039 else if (data & CyOVERRUN)
1040 info->icount.overrun++;
1042 if (data & info->ignore_status_mask) {
1046 if (tty_buffer_request_room(tty, 1)) {
1047 if (data & info->read_status_mask) {
1048 if (data & CyBREAK) {
1049 tty_insert_flip_char(tty,
1050 readb(base_addr + (CyRDSR <<
1051 index)), TTY_BREAK);
1053 if (info->port.flags & ASYNC_SAK)
1055 } else if (data & CyFRAME) {
1056 tty_insert_flip_char(tty,
1057 readb(base_addr + (CyRDSR <<
1058 index)), TTY_FRAME);
1060 info->idle_stats.frame_errs++;
1061 } else if (data & CyPARITY) {
1062 /* Pieces of seven... */
1063 tty_insert_flip_char(tty,
1064 readb(base_addr + (CyRDSR <<
1065 index)), TTY_PARITY);
1067 info->idle_stats.parity_errs++;
1068 } else if (data & CyOVERRUN) {
1069 tty_insert_flip_char(tty, 0,
1072 /* If the flip buffer itself is
1073 overflowing, we still lose
1074 the next incoming character.
1076 tty_insert_flip_char(tty,
1077 readb(base_addr + (CyRDSR <<
1078 index)), TTY_FRAME);
1080 info->idle_stats.overruns++;
1081 /* These two conditions may imply */
1082 /* a normal read should be done. */
1083 /* } else if(data & CyTIMEOUT) { */
1084 /* } else if(data & CySPECHAR) { */
1086 tty_insert_flip_char(tty, 0,
1091 tty_insert_flip_char(tty, 0, TTY_NORMAL);
1095 /* there was a software buffer overrun and nothing
1096 * could be done about it!!! */
1097 info->icount.buf_overrun++;
1098 info->idle_stats.overruns++;
1100 } else { /* normal character reception */
1101 /* load # chars available from the chip */
1102 char_count = readb(base_addr + (CyRDCR << index));
1104 #ifdef CY_ENABLE_MONITORING
1105 ++info->mon.int_count;
1106 info->mon.char_count += char_count;
1107 if (char_count > info->mon.char_max)
1108 info->mon.char_max = char_count;
1109 info->mon.char_last = char_count;
1111 len = tty_buffer_request_room(tty, char_count);
1113 data = readb(base_addr + (CyRDSR << index));
1114 tty_insert_flip_char(tty, data, TTY_NORMAL);
1115 info->idle_stats.recv_bytes++;
1121 info->idle_stats.recv_idle = jiffies;
1123 tty_schedule_flip(tty);
1125 /* end of service */
1126 cy_writeb(base_addr + (CyRIR << index), save_xir & 0x3f);
1127 cy_writeb(base_addr + (CyCAR << index), save_car);
1130 static void cyy_chip_tx(struct cyclades_card *cinfo, unsigned int chip,
1131 void __iomem *base_addr)
1133 struct cyclades_port *info;
1134 int char_count, index = cinfo->bus_index;
1135 u8 save_xir, channel, save_car, outch;
1137 /* Since we only get here when the transmit buffer
1138 is empty, we know we can always stuff a dozen
1140 #ifdef CY_DEBUG_INTERRUPTS
1141 printk(KERN_DEBUG "cyy_interrupt: xmit intr, chip %d\n", chip);
1144 /* determine the channel & change to that context */
1145 save_xir = readb(base_addr + (CyTIR << index));
1146 channel = save_xir & CyIRChannel;
1147 save_car = readb(base_addr + (CyCAR << index));
1148 cy_writeb(base_addr + (CyCAR << index), save_xir);
1150 /* validate the port# (as configured and open) */
1151 if (channel + chip * 4 >= cinfo->nports) {
1152 cy_writeb(base_addr + (CySRER << index),
1153 readb(base_addr + (CySRER << index)) & ~CyTxRdy);
1156 info = &cinfo->ports[channel + chip * 4];
1157 if (info->port.tty == NULL) {
1158 cy_writeb(base_addr + (CySRER << index),
1159 readb(base_addr + (CySRER << index)) & ~CyTxRdy);
1163 /* load the on-chip space for outbound data */
1164 char_count = info->xmit_fifo_size;
1166 if (info->x_char) { /* send special char */
1167 outch = info->x_char;
1168 cy_writeb(base_addr + (CyTDR << index), outch);
1174 if (info->breakon || info->breakoff) {
1175 if (info->breakon) {
1176 cy_writeb(base_addr + (CyTDR << index), 0);
1177 cy_writeb(base_addr + (CyTDR << index), 0x81);
1181 if (info->breakoff) {
1182 cy_writeb(base_addr + (CyTDR << index), 0);
1183 cy_writeb(base_addr + (CyTDR << index), 0x83);
1189 while (char_count-- > 0) {
1190 if (!info->xmit_cnt) {
1191 if (readb(base_addr + (CySRER << index)) & CyTxMpty) {
1192 cy_writeb(base_addr + (CySRER << index),
1193 readb(base_addr + (CySRER << index)) &
1196 cy_writeb(base_addr + (CySRER << index),
1197 (readb(base_addr + (CySRER << index)) &
1198 ~CyTxRdy) | CyTxMpty);
1202 if (info->port.xmit_buf == NULL) {
1203 cy_writeb(base_addr + (CySRER << index),
1204 readb(base_addr + (CySRER << index)) &
1208 if (info->port.tty->stopped || info->port.tty->hw_stopped) {
1209 cy_writeb(base_addr + (CySRER << index),
1210 readb(base_addr + (CySRER << index)) &
1214 /* Because the Embedded Transmit Commands have been enabled,
1215 * we must check to see if the escape character, NULL, is being
1216 * sent. If it is, we must ensure that there is room for it to
1217 * be doubled in the output stream. Therefore we no longer
1218 * advance the pointer when the character is fetched, but
1219 * rather wait until after the check for a NULL output
1220 * character. This is necessary because there may not be room
1221 * for the two chars needed to send a NULL.)
1223 outch = info->port.xmit_buf[info->xmit_tail];
1226 info->xmit_tail = (info->xmit_tail + 1) &
1227 (SERIAL_XMIT_SIZE - 1);
1228 cy_writeb(base_addr + (CyTDR << index), outch);
1231 if (char_count > 1) {
1233 info->xmit_tail = (info->xmit_tail + 1) &
1234 (SERIAL_XMIT_SIZE - 1);
1235 cy_writeb(base_addr + (CyTDR << index), outch);
1236 cy_writeb(base_addr + (CyTDR << index), 0);
1244 tty_wakeup(info->port.tty);
1246 /* end of service */
1247 cy_writeb(base_addr + (CyTIR << index), save_xir & 0x3f);
1248 cy_writeb(base_addr + (CyCAR << index), save_car);
1251 static void cyy_chip_modem(struct cyclades_card *cinfo, int chip,
1252 void __iomem *base_addr)
1254 struct cyclades_port *info;
1255 int index = cinfo->bus_index;
1256 u8 save_xir, channel, save_car, mdm_change, mdm_status;
1258 /* determine the channel & change to that context */
1259 save_xir = readb(base_addr + (CyMIR << index));
1260 channel = save_xir & CyIRChannel;
1261 info = &cinfo->ports[channel + chip * 4];
1262 save_car = readb(base_addr + (CyCAR << index));
1263 cy_writeb(base_addr + (CyCAR << index), save_xir);
1265 mdm_change = readb(base_addr + (CyMISR << index));
1266 mdm_status = readb(base_addr + (CyMSVR1 << index));
1268 if (!info->port.tty)
1271 if (mdm_change & CyANY_DELTA) {
1272 /* For statistics only */
1273 if (mdm_change & CyDCD)
1275 if (mdm_change & CyCTS)
1277 if (mdm_change & CyDSR)
1279 if (mdm_change & CyRI)
1282 wake_up_interruptible(&info->delta_msr_wait);
1285 if ((mdm_change & CyDCD) && (info->port.flags & ASYNC_CHECK_CD)) {
1286 if (!(mdm_status & CyDCD)) {
1287 tty_hangup(info->port.tty);
1288 info->port.flags &= ~ASYNC_NORMAL_ACTIVE;
1290 wake_up_interruptible(&info->port.open_wait);
1292 if ((mdm_change & CyCTS) && (info->port.flags & ASYNC_CTS_FLOW)) {
1293 if (info->port.tty->hw_stopped) {
1294 if (mdm_status & CyCTS) {
1295 /* cy_start isn't used
1297 info->port.tty->hw_stopped = 0;
1298 cy_writeb(base_addr + (CySRER << index),
1299 readb(base_addr + (CySRER << index)) |
1301 tty_wakeup(info->port.tty);
1304 if (!(mdm_status & CyCTS)) {
1305 /* cy_stop isn't used
1307 info->port.tty->hw_stopped = 1;
1308 cy_writeb(base_addr + (CySRER << index),
1309 readb(base_addr + (CySRER << index)) &
1314 /* if (mdm_change & CyDSR) {
1316 if (mdm_change & CyRI) {
1319 /* end of service */
1320 cy_writeb(base_addr + (CyMIR << index), save_xir & 0x3f);
1321 cy_writeb(base_addr + (CyCAR << index), save_car);
1324 /* The real interrupt service routine is called
1325 whenever the card wants its hand held--chars
1326 received, out buffer empty, modem change, etc.
1328 static irqreturn_t cyy_interrupt(int irq, void *dev_id)
1331 struct cyclades_card *cinfo = dev_id;
1332 void __iomem *base_addr, *card_base_addr;
1333 unsigned int chip, too_many, had_work;
1336 if (unlikely(cinfo == NULL)) {
1337 #ifdef CY_DEBUG_INTERRUPTS
1338 printk(KERN_DEBUG "cyy_interrupt: spurious interrupt %d\n",
1341 return IRQ_NONE; /* spurious interrupt */
1344 card_base_addr = cinfo->base_addr;
1345 index = cinfo->bus_index;
1347 /* card was not initialized yet (e.g. DEBUG_SHIRQ) */
1348 if (unlikely(card_base_addr == NULL))
1351 /* This loop checks all chips in the card. Make a note whenever
1352 _any_ chip had some work to do, as this is considered an
1353 indication that there will be more to do. Only when no chip
1354 has any work does this outermost loop exit.
1358 for (chip = 0; chip < cinfo->num_chips; chip++) {
1359 base_addr = cinfo->base_addr +
1360 (cy_chip_offset[chip] << index);
1362 while ((status = readb(base_addr +
1363 (CySVRR << index))) != 0x00) {
1365 /* The purpose of the following test is to ensure that
1366 no chip can monopolize the driver. This forces the
1367 chips to be checked in a round-robin fashion (after
1368 draining each of a bunch (1000) of characters).
1370 if (1000 < too_many++)
1372 spin_lock(&cinfo->card_lock);
1373 if (status & CySRReceive) /* rx intr */
1374 cyy_chip_rx(cinfo, chip, base_addr);
1375 if (status & CySRTransmit) /* tx intr */
1376 cyy_chip_tx(cinfo, chip, base_addr);
1377 if (status & CySRModem) /* modem intr */
1378 cyy_chip_modem(cinfo, chip, base_addr);
1379 spin_unlock(&cinfo->card_lock);
1384 /* clear interrupts */
1385 spin_lock(&cinfo->card_lock);
1386 cy_writeb(card_base_addr + (Cy_ClrIntr << index), 0);
1387 /* Cy_ClrIntr is 0x1800 */
1388 spin_unlock(&cinfo->card_lock);
1390 } /* cyy_interrupt */
1392 /***********************************************************/
1393 /********* End of block of Cyclom-Y specific code **********/
1394 /******** Start of block of Cyclades-Z specific code *******/
1395 /***********************************************************/
1398 cyz_fetch_msg(struct cyclades_card *cinfo,
1399 __u32 *channel, __u8 *cmd, __u32 *param)
1401 struct FIRM_ID __iomem *firm_id;
1402 struct ZFW_CTRL __iomem *zfw_ctrl;
1403 struct BOARD_CTRL __iomem *board_ctrl;
1404 unsigned long loc_doorbell;
1406 firm_id = cinfo->base_addr + ID_ADDRESS;
1407 zfw_ctrl = cinfo->base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
1408 board_ctrl = &zfw_ctrl->board_ctrl;
1410 loc_doorbell = readl(&cinfo->ctl_addr.p9060->loc_doorbell);
1412 *cmd = (char)(0xff & loc_doorbell);
1413 *channel = readl(&board_ctrl->fwcmd_channel);
1414 *param = (__u32) readl(&board_ctrl->fwcmd_param);
1415 cy_writel(&cinfo->ctl_addr.p9060->loc_doorbell, 0xffffffff);
1419 } /* cyz_fetch_msg */
1422 cyz_issue_cmd(struct cyclades_card *cinfo,
1423 __u32 channel, __u8 cmd, __u32 param)
1425 struct FIRM_ID __iomem *firm_id;
1426 struct ZFW_CTRL __iomem *zfw_ctrl;
1427 struct BOARD_CTRL __iomem *board_ctrl;
1428 __u32 __iomem *pci_doorbell;
1431 firm_id = cinfo->base_addr + ID_ADDRESS;
1432 if (!cyz_is_loaded(cinfo))
1435 zfw_ctrl = cinfo->base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
1436 board_ctrl = &zfw_ctrl->board_ctrl;
1439 pci_doorbell = &cinfo->ctl_addr.p9060->pci_doorbell;
1440 while ((readl(pci_doorbell) & 0xff) != 0) {
1441 if (index++ == 1000)
1442 return (int)(readl(pci_doorbell) & 0xff);
1445 cy_writel(&board_ctrl->hcmd_channel, channel);
1446 cy_writel(&board_ctrl->hcmd_param, param);
1447 cy_writel(pci_doorbell, (long)cmd);
1450 } /* cyz_issue_cmd */
1452 static void cyz_handle_rx(struct cyclades_port *info,
1453 struct BUF_CTRL __iomem *buf_ctrl)
1455 struct cyclades_card *cinfo = info->card;
1456 struct tty_struct *tty = info->port.tty;
1457 unsigned int char_count;
1464 __u32 rx_put, rx_get, new_rx_get, rx_bufsize, rx_bufaddr;
1466 rx_get = new_rx_get = readl(&buf_ctrl->rx_get);
1467 rx_put = readl(&buf_ctrl->rx_put);
1468 rx_bufsize = readl(&buf_ctrl->rx_bufsize);
1469 rx_bufaddr = readl(&buf_ctrl->rx_bufaddr);
1470 if (rx_put >= rx_get)
1471 char_count = rx_put - rx_get;
1473 char_count = rx_put - rx_get + rx_bufsize;
1476 #ifdef CY_ENABLE_MONITORING
1477 info->mon.int_count++;
1478 info->mon.char_count += char_count;
1479 if (char_count > info->mon.char_max)
1480 info->mon.char_max = char_count;
1481 info->mon.char_last = char_count;
1484 /* flush received characters */
1485 new_rx_get = (new_rx_get + char_count) &
1487 info->rflush_count++;
1490 /* we'd like to use memcpy(t, f, n) and memset(s, c, count)
1491 for performance, but because of buffer boundaries, there
1492 may be several steps to the operation */
1494 len = tty_prepare_flip_string(tty, &buf,
1499 len = min_t(unsigned int, min(len, char_count),
1500 rx_bufsize - new_rx_get);
1502 memcpy_fromio(buf, cinfo->base_addr +
1503 rx_bufaddr + new_rx_get, len);
1505 new_rx_get = (new_rx_get + len) &
1508 info->icount.rx += len;
1509 info->idle_stats.recv_bytes += len;
1512 len = tty_buffer_request_room(tty, char_count);
1514 data = readb(cinfo->base_addr + rx_bufaddr +
1516 new_rx_get = (new_rx_get + 1) &
1518 tty_insert_flip_char(tty, data, TTY_NORMAL);
1519 info->idle_stats.recv_bytes++;
1523 #ifdef CONFIG_CYZ_INTR
1524 /* Recalculate the number of chars in the RX buffer and issue
1525 a cmd in case it's higher than the RX high water mark */
1526 rx_put = readl(&buf_ctrl->rx_put);
1527 if (rx_put >= rx_get)
1528 char_count = rx_put - rx_get;
1530 char_count = rx_put - rx_get + rx_bufsize;
1531 if (char_count >= readl(&buf_ctrl->rx_threshold) &&
1532 !timer_pending(&cyz_rx_full_timer[
1534 mod_timer(&cyz_rx_full_timer[info->line],
1537 info->idle_stats.recv_idle = jiffies;
1538 tty_schedule_flip(tty);
1541 cy_writel(&buf_ctrl->rx_get, new_rx_get);
1545 static void cyz_handle_tx(struct cyclades_port *info,
1546 struct BUF_CTRL __iomem *buf_ctrl)
1548 struct cyclades_card *cinfo = info->card;
1549 struct tty_struct *tty = info->port.tty;
1551 unsigned int char_count;
1555 __u32 tx_put, tx_get, tx_bufsize, tx_bufaddr;
1557 if (info->xmit_cnt <= 0) /* Nothing to transmit */
1560 tx_get = readl(&buf_ctrl->tx_get);
1561 tx_put = readl(&buf_ctrl->tx_put);
1562 tx_bufsize = readl(&buf_ctrl->tx_bufsize);
1563 tx_bufaddr = readl(&buf_ctrl->tx_bufaddr);
1564 if (tx_put >= tx_get)
1565 char_count = tx_get - tx_put - 1 + tx_bufsize;
1567 char_count = tx_get - tx_put - 1;
1574 if (info->x_char) { /* send special char */
1575 data = info->x_char;
1577 cy_writeb(cinfo->base_addr + tx_bufaddr + tx_put, data);
1578 tx_put = (tx_put + 1) & (tx_bufsize - 1);
1584 while (0 < (small_count = min_t(unsigned int,
1585 tx_bufsize - tx_put, min_t(unsigned int,
1586 (SERIAL_XMIT_SIZE - info->xmit_tail),
1587 min_t(unsigned int, info->xmit_cnt,
1590 memcpy_toio((char *)(cinfo->base_addr + tx_bufaddr +
1592 &info->port.xmit_buf[info->xmit_tail],
1595 tx_put = (tx_put + small_count) & (tx_bufsize - 1);
1596 char_count -= small_count;
1597 info->icount.tx += small_count;
1598 info->xmit_cnt -= small_count;
1599 info->xmit_tail = (info->xmit_tail + small_count) &
1600 (SERIAL_XMIT_SIZE - 1);
1603 while (info->xmit_cnt && char_count) {
1604 data = info->port.xmit_buf[info->xmit_tail];
1606 info->xmit_tail = (info->xmit_tail + 1) &
1607 (SERIAL_XMIT_SIZE - 1);
1609 cy_writeb(cinfo->base_addr + tx_bufaddr + tx_put, data);
1610 tx_put = (tx_put + 1) & (tx_bufsize - 1);
1618 cy_writel(&buf_ctrl->tx_put, tx_put);
1622 static void cyz_handle_cmd(struct cyclades_card *cinfo)
1624 struct tty_struct *tty;
1625 struct cyclades_port *info;
1626 static struct FIRM_ID __iomem *firm_id;
1627 static struct ZFW_CTRL __iomem *zfw_ctrl;
1628 static struct BOARD_CTRL __iomem *board_ctrl;
1629 static struct CH_CTRL __iomem *ch_ctrl;
1630 static struct BUF_CTRL __iomem *buf_ctrl;
1631 __u32 channel, param, fw_ver;
1636 firm_id = cinfo->base_addr + ID_ADDRESS;
1637 zfw_ctrl = cinfo->base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
1638 board_ctrl = &zfw_ctrl->board_ctrl;
1639 fw_ver = readl(&board_ctrl->fw_version);
1641 while (cyz_fetch_msg(cinfo, &channel, &cmd, ¶m) == 1) {
1644 info = &cinfo->ports[channel];
1645 tty = info->port.tty;
1649 ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]);
1650 buf_ctrl = &(zfw_ctrl->buf_ctrl[channel]);
1654 tty_insert_flip_char(tty, 0, TTY_PARITY);
1659 tty_insert_flip_char(tty, 0, TTY_FRAME);
1664 tty_insert_flip_char(tty, 0, TTY_BREAK);
1671 if (info->port.flags & ASYNC_CHECK_CD) {
1672 if ((fw_ver > 241 ? ((u_long) param) :
1673 readl(&ch_ctrl->rs_status)) &
1675 wake_up_interruptible(&info->port.open_wait);
1677 tty_hangup(info->port.tty);
1678 wake_up_interruptible(&info->port.open_wait);
1679 info->port.flags &= ~ASYNC_NORMAL_ACTIVE;
1697 complete(&info->shutdown_wait);
1700 #ifdef CONFIG_CYZ_INTR
1704 /* Reception Interrupt */
1705 #ifdef CY_DEBUG_INTERRUPTS
1706 printk(KERN_DEBUG "cyz_interrupt: rcvd intr, card %d, "
1707 "port %ld\n", info->card, channel);
1709 cyz_handle_rx(info, buf_ctrl);
1714 /* Transmission Interrupt */
1715 #ifdef CY_DEBUG_INTERRUPTS
1716 printk(KERN_DEBUG "cyz_interrupt: xmit intr, card %d, "
1717 "port %ld\n", info->card, channel);
1719 cyz_handle_tx(info, buf_ctrl);
1721 #endif /* CONFIG_CYZ_INTR */
1723 /* should do something with this !!! */
1729 wake_up_interruptible(&info->delta_msr_wait);
1731 tty_schedule_flip(tty);
1735 #ifdef CONFIG_CYZ_INTR
1736 static irqreturn_t cyz_interrupt(int irq, void *dev_id)
1738 struct cyclades_card *cinfo = dev_id;
1740 if (unlikely(!cyz_is_loaded(cinfo))) {
1741 #ifdef CY_DEBUG_INTERRUPTS
1742 printk(KERN_DEBUG "cyz_interrupt: board not yet loaded "
1748 /* Handle the interrupts */
1749 cyz_handle_cmd(cinfo);
1752 } /* cyz_interrupt */
1754 static void cyz_rx_restart(unsigned long arg)
1756 struct cyclades_port *info = (struct cyclades_port *)arg;
1757 struct cyclades_card *card = info->card;
1759 __u32 channel = info->line - card->first_line;
1760 unsigned long flags;
1762 spin_lock_irqsave(&card->card_lock, flags);
1763 retval = cyz_issue_cmd(card, channel, C_CM_INTBACK2, 0L);
1765 printk(KERN_ERR "cyc:cyz_rx_restart retval on ttyC%d was %x\n",
1766 info->line, retval);
1768 spin_unlock_irqrestore(&card->card_lock, flags);
1771 #else /* CONFIG_CYZ_INTR */
1773 static void cyz_poll(unsigned long arg)
1775 struct cyclades_card *cinfo;
1776 struct cyclades_port *info;
1777 struct tty_struct *tty;
1778 struct FIRM_ID __iomem *firm_id;
1779 struct ZFW_CTRL __iomem *zfw_ctrl;
1780 struct BOARD_CTRL __iomem *board_ctrl;
1781 struct BUF_CTRL __iomem *buf_ctrl;
1782 unsigned long expires = jiffies + HZ;
1783 unsigned int port, card;
1785 for (card = 0; card < NR_CARDS; card++) {
1786 cinfo = &cy_card[card];
1788 if (!cy_is_Z(cinfo))
1790 if (!cyz_is_loaded(cinfo))
1793 firm_id = cinfo->base_addr + ID_ADDRESS;
1794 zfw_ctrl = cinfo->base_addr +
1795 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
1796 board_ctrl = &(zfw_ctrl->board_ctrl);
1798 /* Skip first polling cycle to avoid racing conditions with the FW */
1799 if (!cinfo->intr_enabled) {
1800 cinfo->nports = (int)readl(&board_ctrl->n_channel);
1801 cinfo->intr_enabled = 1;
1805 cyz_handle_cmd(cinfo);
1807 for (port = 0; port < cinfo->nports; port++) {
1808 info = &cinfo->ports[port];
1809 tty = info->port.tty;
1810 buf_ctrl = &(zfw_ctrl->buf_ctrl[port]);
1812 if (!info->throttle)
1813 cyz_handle_rx(info, buf_ctrl);
1814 cyz_handle_tx(info, buf_ctrl);
1816 /* poll every 'cyz_polling_cycle' period */
1817 expires = jiffies + cyz_polling_cycle;
1819 mod_timer(&cyz_timerlist, expires);
1822 #endif /* CONFIG_CYZ_INTR */
1824 /********** End of block of Cyclades-Z specific code *********/
1825 /***********************************************************/
1827 /* This is called whenever a port becomes active;
1828 interrupts are enabled and DTR & RTS are turned on.
1830 static int startup(struct cyclades_port *info)
1832 struct cyclades_card *card;
1833 unsigned long flags;
1835 void __iomem *base_addr;
1836 int chip, channel, index;
1840 channel = info->line - card->first_line;
1842 page = get_zeroed_page(GFP_KERNEL);
1846 spin_lock_irqsave(&card->card_lock, flags);
1848 if (info->port.flags & ASYNC_INITIALIZED) {
1855 set_bit(TTY_IO_ERROR, &info->port.tty->flags);
1860 if (info->port.xmit_buf)
1863 info->port.xmit_buf = (unsigned char *)page;
1865 spin_unlock_irqrestore(&card->card_lock, flags);
1867 set_line_char(info);
1869 if (!cy_is_Z(card)) {
1870 chip = channel >> 2;
1872 index = card->bus_index;
1873 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
1875 #ifdef CY_DEBUG_OPEN
1876 printk(KERN_DEBUG "cyc startup card %d, chip %d, channel %d, "
1878 card, chip, channel, base_addr);
1880 spin_lock_irqsave(&card->card_lock, flags);
1882 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
1884 cy_writeb(base_addr + (CyRTPR << index),
1885 (info->default_timeout ? info->default_timeout : 0x02));
1886 /* 10ms rx timeout */
1888 cyy_issue_cmd(base_addr, CyCHAN_CTL | CyENB_RCVR | CyENB_XMTR,
1891 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
1892 cy_writeb(base_addr + (CyMSVR1 << index), CyRTS);
1893 cy_writeb(base_addr + (CyMSVR2 << index), CyDTR);
1896 printk(KERN_DEBUG "cyc:startup raising DTR\n");
1897 printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
1898 readb(base_addr + (CyMSVR1 << index)),
1899 readb(base_addr + (CyMSVR2 << index)));
1902 cy_writeb(base_addr + (CySRER << index),
1903 readb(base_addr + (CySRER << index)) | CyRxData);
1904 info->port.flags |= ASYNC_INITIALIZED;
1907 clear_bit(TTY_IO_ERROR, &info->port.tty->flags);
1908 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
1909 info->breakon = info->breakoff = 0;
1910 memset((char *)&info->idle_stats, 0, sizeof(info->idle_stats));
1911 info->idle_stats.in_use =
1912 info->idle_stats.recv_idle =
1913 info->idle_stats.xmit_idle = jiffies;
1915 spin_unlock_irqrestore(&card->card_lock, flags);
1918 struct FIRM_ID __iomem *firm_id;
1919 struct ZFW_CTRL __iomem *zfw_ctrl;
1920 struct BOARD_CTRL __iomem *board_ctrl;
1921 struct CH_CTRL __iomem *ch_ctrl;
1923 base_addr = card->base_addr;
1925 firm_id = base_addr + ID_ADDRESS;
1926 if (!cyz_is_loaded(card))
1929 zfw_ctrl = card->base_addr +
1930 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
1931 board_ctrl = &zfw_ctrl->board_ctrl;
1932 ch_ctrl = zfw_ctrl->ch_ctrl;
1934 #ifdef CY_DEBUG_OPEN
1935 printk(KERN_DEBUG "cyc startup Z card %d, channel %d, "
1936 "base_addr %p\n", card, channel, base_addr);
1938 spin_lock_irqsave(&card->card_lock, flags);
1940 cy_writel(&ch_ctrl[channel].op_mode, C_CH_ENABLE);
1942 #ifdef CONFIG_CYZ_INTR
1943 cy_writel(&ch_ctrl[channel].intr_enable,
1944 C_IN_TXBEMPTY | C_IN_TXLOWWM | C_IN_RXHIWM |
1945 C_IN_RXNNDT | C_IN_IOCTLW | C_IN_MDCD);
1947 cy_writel(&ch_ctrl[channel].intr_enable,
1948 C_IN_IOCTLW | C_IN_MDCD);
1949 #endif /* CONFIG_CYZ_INTR */
1951 #ifdef CONFIG_CYZ_INTR
1952 cy_writel(&ch_ctrl[channel].intr_enable,
1953 C_IN_TXBEMPTY | C_IN_TXLOWWM | C_IN_RXHIWM |
1954 C_IN_RXNNDT | C_IN_MDCD);
1956 cy_writel(&ch_ctrl[channel].intr_enable, C_IN_MDCD);
1957 #endif /* CONFIG_CYZ_INTR */
1960 retval = cyz_issue_cmd(card, channel, C_CM_IOCTL, 0L);
1962 printk(KERN_ERR "cyc:startup(1) retval on ttyC%d was "
1963 "%x\n", info->line, retval);
1966 /* Flush RX buffers before raising DTR and RTS */
1967 retval = cyz_issue_cmd(card, channel, C_CM_FLUSH_RX, 0L);
1969 printk(KERN_ERR "cyc:startup(2) retval on ttyC%d was "
1970 "%x\n", info->line, retval);
1973 /* set timeout !!! */
1974 /* set RTS and DTR !!! */
1975 cy_writel(&ch_ctrl[channel].rs_control,
1976 readl(&ch_ctrl[channel].rs_control) | C_RS_RTS |
1978 retval = cyz_issue_cmd(card, channel, C_CM_IOCTLM, 0L);
1980 printk(KERN_ERR "cyc:startup(3) retval on ttyC%d was "
1981 "%x\n", info->line, retval);
1984 printk(KERN_DEBUG "cyc:startup raising Z DTR\n");
1987 /* enable send, recv, modem !!! */
1989 info->port.flags |= ASYNC_INITIALIZED;
1991 clear_bit(TTY_IO_ERROR, &info->port.tty->flags);
1992 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
1993 info->breakon = info->breakoff = 0;
1994 memset((char *)&info->idle_stats, 0, sizeof(info->idle_stats));
1995 info->idle_stats.in_use =
1996 info->idle_stats.recv_idle =
1997 info->idle_stats.xmit_idle = jiffies;
1999 spin_unlock_irqrestore(&card->card_lock, flags);
2002 #ifdef CY_DEBUG_OPEN
2003 printk(KERN_DEBUG "cyc startup done\n");
2008 spin_unlock_irqrestore(&card->card_lock, flags);
2012 static void start_xmit(struct cyclades_port *info)
2014 struct cyclades_card *card;
2015 unsigned long flags;
2016 void __iomem *base_addr;
2017 int chip, channel, index;
2020 channel = info->line - card->first_line;
2021 if (!cy_is_Z(card)) {
2022 chip = channel >> 2;
2024 index = card->bus_index;
2025 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
2027 spin_lock_irqsave(&card->card_lock, flags);
2028 cy_writeb(base_addr + (CyCAR << index), channel);
2029 cy_writeb(base_addr + (CySRER << index),
2030 readb(base_addr + (CySRER << index)) | CyTxRdy);
2031 spin_unlock_irqrestore(&card->card_lock, flags);
2033 #ifdef CONFIG_CYZ_INTR
2036 spin_lock_irqsave(&card->card_lock, flags);
2037 retval = cyz_issue_cmd(card, channel, C_CM_INTBACK, 0L);
2039 printk(KERN_ERR "cyc:start_xmit retval on ttyC%d was "
2040 "%x\n", info->line, retval);
2042 spin_unlock_irqrestore(&card->card_lock, flags);
2043 #else /* CONFIG_CYZ_INTR */
2044 /* Don't have to do anything at this time */
2045 #endif /* CONFIG_CYZ_INTR */
2050 * This routine shuts down a serial port; interrupts are disabled,
2051 * and DTR is dropped if the hangup on close termio flag is on.
2053 static void shutdown(struct cyclades_port *info)
2055 struct cyclades_card *card;
2056 unsigned long flags;
2057 void __iomem *base_addr;
2058 int chip, channel, index;
2060 if (!(info->port.flags & ASYNC_INITIALIZED))
2064 channel = info->line - card->first_line;
2065 if (!cy_is_Z(card)) {
2066 chip = channel >> 2;
2068 index = card->bus_index;
2069 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
2071 #ifdef CY_DEBUG_OPEN
2072 printk(KERN_DEBUG "cyc shutdown Y card %d, chip %d, "
2073 "channel %d, base_addr %p\n",
2074 card, chip, channel, base_addr);
2077 spin_lock_irqsave(&card->card_lock, flags);
2079 /* Clear delta_msr_wait queue to avoid mem leaks. */
2080 wake_up_interruptible(&info->delta_msr_wait);
2082 if (info->port.xmit_buf) {
2083 unsigned char *temp;
2084 temp = info->port.xmit_buf;
2085 info->port.xmit_buf = NULL;
2086 free_page((unsigned long)temp);
2088 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
2089 if (!info->port.tty || (info->port.tty->termios->c_cflag & HUPCL)) {
2090 cy_writeb(base_addr + (CyMSVR1 << index), ~CyRTS);
2091 cy_writeb(base_addr + (CyMSVR2 << index), ~CyDTR);
2093 printk(KERN_DEBUG "cyc shutdown dropping DTR\n");
2094 printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
2095 readb(base_addr + (CyMSVR1 << index)),
2096 readb(base_addr + (CyMSVR2 << index)));
2099 cyy_issue_cmd(base_addr, CyCHAN_CTL | CyDIS_RCVR, index);
2100 /* it may be appropriate to clear _XMIT at
2101 some later date (after testing)!!! */
2104 set_bit(TTY_IO_ERROR, &info->port.tty->flags);
2105 info->port.flags &= ~ASYNC_INITIALIZED;
2106 spin_unlock_irqrestore(&card->card_lock, flags);
2108 struct FIRM_ID __iomem *firm_id;
2109 struct ZFW_CTRL __iomem *zfw_ctrl;
2110 struct BOARD_CTRL __iomem *board_ctrl;
2111 struct CH_CTRL __iomem *ch_ctrl;
2114 base_addr = card->base_addr;
2115 #ifdef CY_DEBUG_OPEN
2116 printk(KERN_DEBUG "cyc shutdown Z card %d, channel %d, "
2117 "base_addr %p\n", card, channel, base_addr);
2120 firm_id = base_addr + ID_ADDRESS;
2121 if (!cyz_is_loaded(card))
2124 zfw_ctrl = card->base_addr +
2125 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
2126 board_ctrl = &zfw_ctrl->board_ctrl;
2127 ch_ctrl = zfw_ctrl->ch_ctrl;
2129 spin_lock_irqsave(&card->card_lock, flags);
2131 if (info->port.xmit_buf) {
2132 unsigned char *temp;
2133 temp = info->port.xmit_buf;
2134 info->port.xmit_buf = NULL;
2135 free_page((unsigned long)temp);
2138 if (!info->port.tty || (info->port.tty->termios->c_cflag & HUPCL)) {
2139 cy_writel(&ch_ctrl[channel].rs_control,
2140 (__u32)(readl(&ch_ctrl[channel].rs_control) &
2141 ~(C_RS_RTS | C_RS_DTR)));
2142 retval = cyz_issue_cmd(info->card, channel,
2145 printk(KERN_ERR"cyc:shutdown retval on ttyC%d "
2146 "was %x\n", info->line, retval);
2149 printk(KERN_DEBUG "cyc:shutdown dropping Z DTR\n");
2154 set_bit(TTY_IO_ERROR, &info->port.tty->flags);
2155 info->port.flags &= ~ASYNC_INITIALIZED;
2157 spin_unlock_irqrestore(&card->card_lock, flags);
2160 #ifdef CY_DEBUG_OPEN
2161 printk(KERN_DEBUG "cyc shutdown done\n");
2166 * ------------------------------------------------------------
2167 * cy_open() and friends
2168 * ------------------------------------------------------------
2172 block_til_ready(struct tty_struct *tty, struct file *filp,
2173 struct cyclades_port *info)
2175 DECLARE_WAITQUEUE(wait, current);
2176 struct cyclades_card *cinfo;
2177 unsigned long flags;
2178 int chip, channel, index;
2180 void __iomem *base_addr;
2183 channel = info->line - cinfo->first_line;
2186 * If the device is in the middle of being closed, then block
2187 * until it's done, and then try again.
2189 if (tty_hung_up_p(filp) || (info->port.flags & ASYNC_CLOSING)) {
2190 wait_event_interruptible(info->port.close_wait,
2191 !(info->port.flags & ASYNC_CLOSING));
2192 return (info->port.flags & ASYNC_HUP_NOTIFY) ? -EAGAIN: -ERESTARTSYS;
2196 * If non-blocking mode is set, then make the check up front
2199 if ((filp->f_flags & O_NONBLOCK) ||
2200 (tty->flags & (1 << TTY_IO_ERROR))) {
2201 info->port.flags |= ASYNC_NORMAL_ACTIVE;
2206 * Block waiting for the carrier detect and the line to become
2207 * free (i.e., not in use by the callout). While we are in
2208 * this loop, info->port.count is dropped by one, so that
2209 * cy_close() knows when to free things. We restore it upon
2210 * exit, either normal or abnormal.
2213 add_wait_queue(&info->port.open_wait, &wait);
2214 #ifdef CY_DEBUG_OPEN
2215 printk(KERN_DEBUG "cyc block_til_ready before block: ttyC%d, "
2216 "count = %d\n", info->line, info->port.count);
2218 spin_lock_irqsave(&cinfo->card_lock, flags);
2219 if (!tty_hung_up_p(filp))
2221 spin_unlock_irqrestore(&cinfo->card_lock, flags);
2222 #ifdef CY_DEBUG_COUNT
2223 printk(KERN_DEBUG "cyc block_til_ready: (%d): decrementing count to "
2224 "%d\n", current->pid, info->port.count);
2226 info->port.blocked_open++;
2228 if (!cy_is_Z(cinfo)) {
2229 chip = channel >> 2;
2231 index = cinfo->bus_index;
2232 base_addr = cinfo->base_addr + (cy_chip_offset[chip] << index);
2235 spin_lock_irqsave(&cinfo->card_lock, flags);
2236 if ((tty->termios->c_cflag & CBAUD)) {
2237 cy_writeb(base_addr + (CyCAR << index),
2239 cy_writeb(base_addr + (CyMSVR1 << index),
2241 cy_writeb(base_addr + (CyMSVR2 << index),
2244 printk(KERN_DEBUG "cyc:block_til_ready raising "
2246 printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
2247 readb(base_addr + (CyMSVR1 << index)),
2248 readb(base_addr + (CyMSVR2 << index)));
2251 spin_unlock_irqrestore(&cinfo->card_lock, flags);
2253 set_current_state(TASK_INTERRUPTIBLE);
2254 if (tty_hung_up_p(filp) ||
2255 !(info->port.flags & ASYNC_INITIALIZED)) {
2256 retval = ((info->port.flags & ASYNC_HUP_NOTIFY) ?
2257 -EAGAIN : -ERESTARTSYS);
2261 spin_lock_irqsave(&cinfo->card_lock, flags);
2262 cy_writeb(base_addr + (CyCAR << index),
2264 if (!(info->port.flags & ASYNC_CLOSING) && (C_CLOCAL(tty) ||
2266 (CyMSVR1 << index)) & CyDCD))) {
2267 spin_unlock_irqrestore(&cinfo->card_lock, flags);
2270 spin_unlock_irqrestore(&cinfo->card_lock, flags);
2272 if (signal_pending(current)) {
2273 retval = -ERESTARTSYS;
2276 #ifdef CY_DEBUG_OPEN
2277 printk(KERN_DEBUG "cyc block_til_ready blocking: "
2278 "ttyC%d, count = %d\n",
2279 info->line, info->port.count);
2284 struct FIRM_ID __iomem *firm_id;
2285 struct ZFW_CTRL __iomem *zfw_ctrl;
2286 struct BOARD_CTRL __iomem *board_ctrl;
2287 struct CH_CTRL __iomem *ch_ctrl;
2289 base_addr = cinfo->base_addr;
2290 firm_id = base_addr + ID_ADDRESS;
2291 if (!cyz_is_loaded(cinfo)) {
2292 __set_current_state(TASK_RUNNING);
2293 remove_wait_queue(&info->port.open_wait, &wait);
2297 zfw_ctrl = base_addr + (readl(&firm_id->zfwctrl_addr)
2299 board_ctrl = &zfw_ctrl->board_ctrl;
2300 ch_ctrl = zfw_ctrl->ch_ctrl;
2303 if ((tty->termios->c_cflag & CBAUD)) {
2304 cy_writel(&ch_ctrl[channel].rs_control,
2305 readl(&ch_ctrl[channel].rs_control) |
2306 C_RS_RTS | C_RS_DTR);
2307 retval = cyz_issue_cmd(cinfo,
2308 channel, C_CM_IOCTLM, 0L);
2310 printk(KERN_ERR "cyc:block_til_ready "
2311 "retval on ttyC%d was %x\n",
2312 info->line, retval);
2315 printk(KERN_DEBUG "cyc:block_til_ready raising "
2320 set_current_state(TASK_INTERRUPTIBLE);
2321 if (tty_hung_up_p(filp) ||
2322 !(info->port.flags & ASYNC_INITIALIZED)) {
2323 retval = ((info->port.flags & ASYNC_HUP_NOTIFY) ?
2324 -EAGAIN : -ERESTARTSYS);
2327 if (!(info->port.flags & ASYNC_CLOSING) && (C_CLOCAL(tty) ||
2328 (readl(&ch_ctrl[channel].rs_status) &
2332 if (signal_pending(current)) {
2333 retval = -ERESTARTSYS;
2336 #ifdef CY_DEBUG_OPEN
2337 printk(KERN_DEBUG "cyc block_til_ready blocking: "
2338 "ttyC%d, count = %d\n",
2339 info->line, info->port.count);
2344 __set_current_state(TASK_RUNNING);
2345 remove_wait_queue(&info->port.open_wait, &wait);
2346 if (!tty_hung_up_p(filp)) {
2348 #ifdef CY_DEBUG_COUNT
2349 printk(KERN_DEBUG "cyc:block_til_ready (%d): incrementing "
2350 "count to %d\n", current->pid, info->port.count);
2353 info->port.blocked_open--;
2354 #ifdef CY_DEBUG_OPEN
2355 printk(KERN_DEBUG "cyc:block_til_ready after blocking: ttyC%d, "
2356 "count = %d\n", info->line, info->port.count);
2360 info->port.flags |= ASYNC_NORMAL_ACTIVE;
2362 } /* block_til_ready */
2365 * This routine is called whenever a serial port is opened. It
2366 * performs the serial-specific initialization for the tty structure.
2368 static int cy_open(struct tty_struct *tty, struct file *filp)
2370 struct cyclades_port *info;
2371 unsigned int i, line;
2375 if (tty->index < 0 || NR_PORTS <= line)
2378 for (i = 0; i < NR_CARDS; i++)
2379 if (line < cy_card[i].first_line + cy_card[i].nports &&
2380 line >= cy_card[i].first_line)
2384 info = &cy_card[i].ports[line - cy_card[i].first_line];
2388 /* If the card's firmware hasn't been loaded,
2389 treat it as absent from the system. This
2390 will make the user pay attention.
2392 if (cy_is_Z(info->card)) {
2393 struct cyclades_card *cinfo = info->card;
2394 struct FIRM_ID __iomem *firm_id = cinfo->base_addr + ID_ADDRESS;
2396 if (!cyz_is_loaded(cinfo)) {
2397 if (cinfo->hw_ver == ZE_V1 && cyz_fpga_loaded(cinfo) &&
2398 readl(&firm_id->signature) ==
2400 printk(KERN_ERR "cyc:Cyclades-Z Error: you "
2401 "need an external power supply for "
2402 "this number of ports.\nFirmware "
2405 printk(KERN_ERR "cyc:Cyclades-Z firmware not "
2410 #ifdef CONFIG_CYZ_INTR
2412 /* In case this Z board is operating in interrupt mode, its
2413 interrupts should be enabled as soon as the first open
2414 happens to one of its ports. */
2415 if (!cinfo->intr_enabled) {
2416 struct ZFW_CTRL __iomem *zfw_ctrl;
2417 struct BOARD_CTRL __iomem *board_ctrl;
2420 zfw_ctrl = cinfo->base_addr +
2421 (readl(&firm_id->zfwctrl_addr) &
2424 board_ctrl = &zfw_ctrl->board_ctrl;
2426 /* Enable interrupts on the PLX chip */
2427 intr = readw(&cinfo->ctl_addr.p9060->
2428 intr_ctrl_stat) | 0x0900;
2429 cy_writew(&cinfo->ctl_addr.p9060->
2430 intr_ctrl_stat, intr);
2431 /* Enable interrupts on the FW */
2432 retval = cyz_issue_cmd(cinfo, 0,
2435 printk(KERN_ERR "cyc:IRQ enable retval "
2436 "was %x\n", retval);
2439 (int)readl(&board_ctrl->n_channel);
2440 cinfo->intr_enabled = 1;
2443 #endif /* CONFIG_CYZ_INTR */
2444 /* Make sure this Z port really exists in hardware */
2445 if (info->line > (cinfo->first_line + cinfo->nports - 1))
2448 #ifdef CY_DEBUG_OTHER
2449 printk(KERN_DEBUG "cyc:cy_open ttyC%d\n", info->line);
2451 tty->driver_data = info;
2452 info->port.tty = tty;
2453 if (serial_paranoia_check(info, tty->name, "cy_open"))
2456 #ifdef CY_DEBUG_OPEN
2457 printk(KERN_DEBUG "cyc:cy_open ttyC%d, count = %d\n", info->line,
2461 #ifdef CY_DEBUG_COUNT
2462 printk(KERN_DEBUG "cyc:cy_open (%d): incrementing count to %d\n",
2463 current->pid, info->port.count);
2467 * If the port is the middle of closing, bail out now
2469 if (tty_hung_up_p(filp) || (info->port.flags & ASYNC_CLOSING)) {
2470 wait_event_interruptible(info->port.close_wait,
2471 !(info->port.flags & ASYNC_CLOSING));
2472 return (info->port.flags & ASYNC_HUP_NOTIFY) ? -EAGAIN: -ERESTARTSYS;
2476 * Start up serial port
2478 retval = startup(info);
2482 retval = block_til_ready(tty, filp, info);
2484 #ifdef CY_DEBUG_OPEN
2485 printk(KERN_DEBUG "cyc:cy_open returning after block_til_ready "
2486 "with %d\n", retval);
2493 #ifdef CY_DEBUG_OPEN
2494 printk(KERN_DEBUG "cyc:cy_open done\n");
2500 * cy_wait_until_sent() --- wait until the transmitter is empty
2502 static void cy_wait_until_sent(struct tty_struct *tty, int timeout)
2504 struct cyclades_card *card;
2505 struct cyclades_port *info = tty->driver_data;
2506 void __iomem *base_addr;
2507 int chip, channel, index;
2508 unsigned long orig_jiffies;
2511 if (serial_paranoia_check(info, tty->name, "cy_wait_until_sent"))
2514 if (info->xmit_fifo_size == 0)
2515 return; /* Just in case.... */
2517 orig_jiffies = jiffies;
2520 * Set the check interval to be 1/5 of the estimated time to
2521 * send a single character, and make it at least 1. The check
2522 * interval should also be less than the timeout.
2524 * Note: we have to use pretty tight timings here to satisfy
2527 char_time = (info->timeout - HZ / 50) / info->xmit_fifo_size;
2528 char_time = char_time / 5;
2534 char_time = min(char_time, timeout);
2536 * If the transmitter hasn't cleared in twice the approximate
2537 * amount of time to send the entire FIFO, it probably won't
2538 * ever clear. This assumes the UART isn't doing flow
2539 * control, which is currently the case. Hence, if it ever
2540 * takes longer than info->timeout, this is probably due to a
2541 * UART bug of some kind. So, we clamp the timeout parameter at
2544 if (!timeout || timeout > 2 * info->timeout)
2545 timeout = 2 * info->timeout;
2546 #ifdef CY_DEBUG_WAIT_UNTIL_SENT
2547 printk(KERN_DEBUG "In cy_wait_until_sent(%d) check=%d, jiff=%lu...",
2548 timeout, char_time, jiffies);
2551 channel = (info->line) - (card->first_line);
2552 if (!cy_is_Z(card)) {
2553 chip = channel >> 2;
2555 index = card->bus_index;
2556 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
2557 while (readb(base_addr + (CySRER << index)) & CyTxRdy) {
2558 #ifdef CY_DEBUG_WAIT_UNTIL_SENT
2559 printk(KERN_DEBUG "Not clean (jiff=%lu)...", jiffies);
2561 if (msleep_interruptible(jiffies_to_msecs(char_time)))
2563 if (timeout && time_after(jiffies, orig_jiffies +
2568 /* Run one more char cycle */
2569 msleep_interruptible(jiffies_to_msecs(char_time * 5));
2571 #ifdef CY_DEBUG_WAIT_UNTIL_SENT
2572 printk(KERN_DEBUG "Clean (jiff=%lu)...done\n", jiffies);
2576 static void cy_flush_buffer(struct tty_struct *tty)
2578 struct cyclades_port *info = tty->driver_data;
2579 struct cyclades_card *card;
2580 int channel, retval;
2581 unsigned long flags;
2584 printk(KERN_DEBUG "cyc:cy_flush_buffer ttyC%d\n", info->line);
2587 if (serial_paranoia_check(info, tty->name, "cy_flush_buffer"))
2591 channel = info->line - card->first_line;
2593 spin_lock_irqsave(&card->card_lock, flags);
2594 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
2595 spin_unlock_irqrestore(&card->card_lock, flags);
2597 if (cy_is_Z(card)) { /* If it is a Z card, flush the on-board
2599 spin_lock_irqsave(&card->card_lock, flags);
2600 retval = cyz_issue_cmd(card, channel, C_CM_FLUSH_TX, 0L);
2602 printk(KERN_ERR "cyc: flush_buffer retval on ttyC%d "
2603 "was %x\n", info->line, retval);
2605 spin_unlock_irqrestore(&card->card_lock, flags);
2608 } /* cy_flush_buffer */
2612 * This routine is called when a particular tty device is closed.
2614 static void cy_close(struct tty_struct *tty, struct file *filp)
2616 struct cyclades_port *info = tty->driver_data;
2617 struct cyclades_card *card;
2618 unsigned long flags;
2620 #ifdef CY_DEBUG_OTHER
2621 printk(KERN_DEBUG "cyc:cy_close ttyC%d\n", info->line);
2624 if (!info || serial_paranoia_check(info, tty->name, "cy_close"))
2629 spin_lock_irqsave(&card->card_lock, flags);
2630 /* If the TTY is being hung up, nothing to do */
2631 if (tty_hung_up_p(filp)) {
2632 spin_unlock_irqrestore(&card->card_lock, flags);
2635 #ifdef CY_DEBUG_OPEN
2636 printk(KERN_DEBUG "cyc:cy_close ttyC%d, count = %d\n", info->line,
2639 if ((tty->count == 1) && (info->port.count != 1)) {
2641 * Uh, oh. tty->count is 1, which means that the tty
2642 * structure will be freed. Info->count should always
2643 * be one in these conditions. If it's greater than
2644 * one, we've got real problems, since it means the
2645 * serial port won't be shutdown.
2647 printk(KERN_ERR "cyc:cy_close: bad serial port count; "
2648 "tty->count is 1, info->port.count is %d\n", info->port.count);
2649 info->port.count = 1;
2651 #ifdef CY_DEBUG_COUNT
2652 printk(KERN_DEBUG "cyc:cy_close at (%d): decrementing count to %d\n",
2653 current->pid, info->port.count - 1);
2655 if (--info->port.count < 0) {
2656 #ifdef CY_DEBUG_COUNT
2657 printk(KERN_DEBUG "cyc:cyc_close setting count to 0\n");
2659 info->port.count = 0;
2661 if (info->port.count) {
2662 spin_unlock_irqrestore(&card->card_lock, flags);
2665 info->port.flags |= ASYNC_CLOSING;
2668 * Now we wait for the transmit buffer to clear; and we notify
2669 * the line discipline to only process XON/XOFF characters.
2672 spin_unlock_irqrestore(&card->card_lock, flags);
2673 if (info->port.closing_wait != CY_CLOSING_WAIT_NONE)
2674 tty_wait_until_sent(tty, info->port.closing_wait);
2676 spin_lock_irqsave(&card->card_lock, flags);
2678 if (!cy_is_Z(card)) {
2679 int channel = info->line - card->first_line;
2680 int index = card->bus_index;
2681 void __iomem *base_addr = card->base_addr +
2682 (cy_chip_offset[channel >> 2] << index);
2683 /* Stop accepting input */
2685 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
2686 cy_writeb(base_addr + (CySRER << index),
2687 readb(base_addr + (CySRER << index)) & ~CyRxData);
2688 if (info->port.flags & ASYNC_INITIALIZED) {
2689 /* Waiting for on-board buffers to be empty before
2691 spin_unlock_irqrestore(&card->card_lock, flags);
2692 cy_wait_until_sent(tty, info->timeout);
2693 spin_lock_irqsave(&card->card_lock, flags);
2697 /* Waiting for on-board buffers to be empty before closing
2699 void __iomem *base_addr = card->base_addr;
2700 struct FIRM_ID __iomem *firm_id = base_addr + ID_ADDRESS;
2701 struct ZFW_CTRL __iomem *zfw_ctrl =
2702 base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
2703 struct CH_CTRL __iomem *ch_ctrl = zfw_ctrl->ch_ctrl;
2704 int channel = info->line - card->first_line;
2707 if (readl(&ch_ctrl[channel].flow_status) != C_FS_TXIDLE) {
2708 retval = cyz_issue_cmd(card, channel, C_CM_IOCTLW, 0L);
2710 printk(KERN_DEBUG "cyc:cy_close retval on "
2711 "ttyC%d was %x\n", info->line, retval);
2713 spin_unlock_irqrestore(&card->card_lock, flags);
2714 wait_for_completion_interruptible(&info->shutdown_wait);
2715 spin_lock_irqsave(&card->card_lock, flags);
2720 spin_unlock_irqrestore(&card->card_lock, flags);
2722 cy_flush_buffer(tty);
2723 tty_ldisc_flush(tty);
2724 spin_lock_irqsave(&card->card_lock, flags);
2727 info->port.tty = NULL;
2728 if (info->port.blocked_open) {
2729 spin_unlock_irqrestore(&card->card_lock, flags);
2730 if (info->port.close_delay) {
2731 msleep_interruptible(jiffies_to_msecs
2732 (info->port.close_delay));
2734 wake_up_interruptible(&info->port.open_wait);
2735 spin_lock_irqsave(&card->card_lock, flags);
2737 info->port.flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CLOSING);
2738 wake_up_interruptible(&info->port.close_wait);
2740 #ifdef CY_DEBUG_OTHER
2741 printk(KERN_DEBUG "cyc:cy_close done\n");
2744 spin_unlock_irqrestore(&card->card_lock, flags);
2747 /* This routine gets called when tty_write has put something into
2748 * the write_queue. The characters may come from user space or
2751 * This routine will return the number of characters actually
2752 * accepted for writing.
2754 * If the port is not already transmitting stuff, start it off by
2755 * enabling interrupts. The interrupt service routine will then
2756 * ensure that the characters are sent.
2757 * If the port is already active, there is no need to kick it.
2760 static int cy_write(struct tty_struct *tty, const unsigned char *buf, int count)
2762 struct cyclades_port *info = tty->driver_data;
2763 unsigned long flags;
2767 printk(KERN_DEBUG "cyc:cy_write ttyC%d\n", info->line);
2770 if (serial_paranoia_check(info, tty->name, "cy_write"))
2773 if (!info->port.xmit_buf)
2776 spin_lock_irqsave(&info->card->card_lock, flags);
2778 c = min(count, (int)(SERIAL_XMIT_SIZE - info->xmit_cnt - 1));
2779 c = min(c, (int)(SERIAL_XMIT_SIZE - info->xmit_head));
2784 memcpy(info->port.xmit_buf + info->xmit_head, buf, c);
2785 info->xmit_head = (info->xmit_head + c) &
2786 (SERIAL_XMIT_SIZE - 1);
2787 info->xmit_cnt += c;
2792 spin_unlock_irqrestore(&info->card->card_lock, flags);
2794 info->idle_stats.xmit_bytes += ret;
2795 info->idle_stats.xmit_idle = jiffies;
2797 if (info->xmit_cnt && !tty->stopped && !tty->hw_stopped)
2804 * This routine is called by the kernel to write a single
2805 * character to the tty device. If the kernel uses this routine,
2806 * it must call the flush_chars() routine (if defined) when it is
2807 * done stuffing characters into the driver. If there is no room
2808 * in the queue, the character is ignored.
2810 static int cy_put_char(struct tty_struct *tty, unsigned char ch)
2812 struct cyclades_port *info = tty->driver_data;
2813 unsigned long flags;
2816 printk(KERN_DEBUG "cyc:cy_put_char ttyC%d\n", info->line);
2819 if (serial_paranoia_check(info, tty->name, "cy_put_char"))
2822 if (!info->port.xmit_buf)
2825 spin_lock_irqsave(&info->card->card_lock, flags);
2826 if (info->xmit_cnt >= (int)(SERIAL_XMIT_SIZE - 1)) {
2827 spin_unlock_irqrestore(&info->card->card_lock, flags);
2831 info->port.xmit_buf[info->xmit_head++] = ch;
2832 info->xmit_head &= SERIAL_XMIT_SIZE - 1;
2834 info->idle_stats.xmit_bytes++;
2835 info->idle_stats.xmit_idle = jiffies;
2836 spin_unlock_irqrestore(&info->card->card_lock, flags);
2841 * This routine is called by the kernel after it has written a
2842 * series of characters to the tty device using put_char().
2844 static void cy_flush_chars(struct tty_struct *tty)
2846 struct cyclades_port *info = tty->driver_data;
2849 printk(KERN_DEBUG "cyc:cy_flush_chars ttyC%d\n", info->line);
2852 if (serial_paranoia_check(info, tty->name, "cy_flush_chars"))
2855 if (info->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped ||
2856 !info->port.xmit_buf)
2860 } /* cy_flush_chars */
2863 * This routine returns the numbers of characters the tty driver
2864 * will accept for queuing to be written. This number is subject
2865 * to change as output buffers get emptied, or if the output flow
2866 * control is activated.
2868 static int cy_write_room(struct tty_struct *tty)
2870 struct cyclades_port *info = tty->driver_data;
2874 printk(KERN_DEBUG "cyc:cy_write_room ttyC%d\n", info->line);
2877 if (serial_paranoia_check(info, tty->name, "cy_write_room"))
2879 ret = SERIAL_XMIT_SIZE - info->xmit_cnt - 1;
2883 } /* cy_write_room */
2885 static int cy_chars_in_buffer(struct tty_struct *tty)
2887 struct cyclades_card *card;
2888 struct cyclades_port *info = tty->driver_data;
2891 if (serial_paranoia_check(info, tty->name, "cy_chars_in_buffer"))
2895 channel = (info->line) - (card->first_line);
2897 #ifdef Z_EXT_CHARS_IN_BUFFER
2898 if (!cy_is_Z(card)) {
2899 #endif /* Z_EXT_CHARS_IN_BUFFER */
2901 printk(KERN_DEBUG "cyc:cy_chars_in_buffer ttyC%d %d\n",
2902 info->line, info->xmit_cnt);
2904 return info->xmit_cnt;
2905 #ifdef Z_EXT_CHARS_IN_BUFFER
2907 static struct FIRM_ID *firm_id;
2908 static struct ZFW_CTRL *zfw_ctrl;
2909 static struct CH_CTRL *ch_ctrl;
2910 static struct BUF_CTRL *buf_ctrl;
2912 __u32 tx_put, tx_get, tx_bufsize;
2915 firm_id = card->base_addr + ID_ADDRESS;
2916 zfw_ctrl = card->base_addr +
2917 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
2918 ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]);
2919 buf_ctrl = &(zfw_ctrl->buf_ctrl[channel]);
2921 tx_get = readl(&buf_ctrl->tx_get);
2922 tx_put = readl(&buf_ctrl->tx_put);
2923 tx_bufsize = readl(&buf_ctrl->tx_bufsize);
2924 if (tx_put >= tx_get)
2925 char_count = tx_put - tx_get;
2927 char_count = tx_put - tx_get + tx_bufsize;
2929 printk(KERN_DEBUG "cyc:cy_chars_in_buffer ttyC%d %d\n",
2930 info->line, info->xmit_cnt + char_count);
2933 return info->xmit_cnt + char_count;
2935 #endif /* Z_EXT_CHARS_IN_BUFFER */
2936 } /* cy_chars_in_buffer */
2939 * ------------------------------------------------------------
2940 * cy_ioctl() and friends
2941 * ------------------------------------------------------------
2944 static void cyy_baud_calc(struct cyclades_port *info, __u32 baud)
2946 int co, co_val, bpr;
2947 __u32 cy_clock = ((info->chip_rev >= CD1400_REV_J) ? 60000000 :
2951 info->tbpr = info->tco = info->rbpr = info->rco = 0;
2955 /* determine which prescaler to use */
2956 for (co = 4, co_val = 2048; co; co--, co_val >>= 2) {
2957 if (cy_clock / co_val / baud > 63)
2961 bpr = (cy_clock / co_val * 2 / baud + 1) / 2;
2965 info->tbpr = info->rbpr = bpr;
2966 info->tco = info->rco = co;
2970 * This routine finds or computes the various line characteristics.
2971 * It used to be called config_setup
2973 static void set_line_char(struct cyclades_port *info)
2975 struct cyclades_card *card;
2976 unsigned long flags;
2977 void __iomem *base_addr;
2978 int chip, channel, index;
2979 unsigned cflag, iflag;
2980 unsigned short chip_number;
2981 int baud, baud_rate = 0;
2984 if (!info->port.tty || !info->port.tty->termios)
2987 if (info->line == -1)
2990 cflag = info->port.tty->termios->c_cflag;
2991 iflag = info->port.tty->termios->c_iflag;
2994 * Set up the tty->alt_speed kludge
2996 if (info->port.tty) {
2997 if ((info->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
2998 info->port.tty->alt_speed = 57600;
2999 if ((info->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
3000 info->port.tty->alt_speed = 115200;
3001 if ((info->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
3002 info->port.tty->alt_speed = 230400;
3003 if ((info->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
3004 info->port.tty->alt_speed = 460800;
3008 channel = info->line - card->first_line;
3009 chip_number = channel / 4;
3011 if (!cy_is_Z(card)) {
3013 index = card->bus_index;
3016 baud = tty_get_baud_rate(info->port.tty);
3017 if (baud == 38400 && (info->port.flags & ASYNC_SPD_MASK) ==
3019 if (info->custom_divisor)
3020 baud_rate = info->baud / info->custom_divisor;
3022 baud_rate = info->baud;
3023 } else if (baud > CD1400_MAX_SPEED) {
3024 baud = CD1400_MAX_SPEED;
3026 /* find the baud index */
3027 for (i = 0; i < 20; i++) {
3028 if (baud == baud_table[i])
3032 i = 19; /* CD1400_MAX_SPEED */
3034 if (baud == 38400 && (info->port.flags & ASYNC_SPD_MASK) ==
3036 cyy_baud_calc(info, baud_rate);
3038 if (info->chip_rev >= CD1400_REV_J) {
3039 /* It is a CD1400 rev. J or later */
3040 info->tbpr = baud_bpr_60[i]; /* Tx BPR */
3041 info->tco = baud_co_60[i]; /* Tx CO */
3042 info->rbpr = baud_bpr_60[i]; /* Rx BPR */
3043 info->rco = baud_co_60[i]; /* Rx CO */
3045 info->tbpr = baud_bpr_25[i]; /* Tx BPR */
3046 info->tco = baud_co_25[i]; /* Tx CO */
3047 info->rbpr = baud_bpr_25[i]; /* Rx BPR */
3048 info->rco = baud_co_25[i]; /* Rx CO */
3051 if (baud_table[i] == 134) {
3052 /* get it right for 134.5 baud */
3053 info->timeout = (info->xmit_fifo_size * HZ * 30 / 269) +
3055 } else if (baud == 38400 && (info->port.flags & ASYNC_SPD_MASK) ==
3057 info->timeout = (info->xmit_fifo_size * HZ * 15 /
3059 } else if (baud_table[i]) {
3060 info->timeout = (info->xmit_fifo_size * HZ * 15 /
3062 /* this needs to be propagated into the card info */
3066 /* By tradition (is it a standard?) a baud rate of zero
3067 implies the line should be/has been closed. A bit
3068 later in this routine such a test is performed. */
3070 /* byte size and parity */
3073 /* receive threshold */
3074 info->cor3 = (info->default_threshold ?
3075 info->default_threshold : baud_cor3[i]);
3077 switch (cflag & CSIZE) {
3079 info->cor1 = Cy_5_BITS;
3082 info->cor1 = Cy_6_BITS;
3085 info->cor1 = Cy_7_BITS;
3088 info->cor1 = Cy_8_BITS;
3092 info->cor1 |= Cy_2_STOP;
3094 if (cflag & PARENB) {
3096 info->cor1 |= CyPARITY_O;
3098 info->cor1 |= CyPARITY_E;
3100 info->cor1 |= CyPARITY_NONE;
3102 /* CTS flow control flag */
3103 if (cflag & CRTSCTS) {
3104 info->port.flags |= ASYNC_CTS_FLOW;
3105 info->cor2 |= CyCtsAE;
3107 info->port.flags &= ~ASYNC_CTS_FLOW;
3108 info->cor2 &= ~CyCtsAE;
3111 info->port.flags &= ~ASYNC_CHECK_CD;
3113 info->port.flags |= ASYNC_CHECK_CD;
3115 /***********************************************
3116 The hardware option, CyRtsAO, presents RTS when
3117 the chip has characters to send. Since most modems
3118 use RTS as reverse (inbound) flow control, this
3119 option is not used. If inbound flow control is
3120 necessary, DTR can be programmed to provide the
3121 appropriate signals for use with a non-standard
3122 cable. Contact Marcio Saito for details.
3123 ***********************************************/
3125 chip = channel >> 2;
3127 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3129 spin_lock_irqsave(&card->card_lock, flags);
3130 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
3132 /* tx and rx baud rate */
3134 cy_writeb(base_addr + (CyTCOR << index), info->tco);
3135 cy_writeb(base_addr + (CyTBPR << index), info->tbpr);
3136 cy_writeb(base_addr + (CyRCOR << index), info->rco);
3137 cy_writeb(base_addr + (CyRBPR << index), info->rbpr);
3139 /* set line characteristics according configuration */
3141 cy_writeb(base_addr + (CySCHR1 << index),
3142 START_CHAR(info->port.tty));
3143 cy_writeb(base_addr + (CySCHR2 << index), STOP_CHAR(info->port.tty));
3144 cy_writeb(base_addr + (CyCOR1 << index), info->cor1);
3145 cy_writeb(base_addr + (CyCOR2 << index), info->cor2);
3146 cy_writeb(base_addr + (CyCOR3 << index), info->cor3);
3147 cy_writeb(base_addr + (CyCOR4 << index), info->cor4);
3148 cy_writeb(base_addr + (CyCOR5 << index), info->cor5);
3150 cyy_issue_cmd(base_addr, CyCOR_CHANGE | CyCOR1ch | CyCOR2ch |
3153 /* !!! Is this needed? */
3154 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
3155 cy_writeb(base_addr + (CyRTPR << index),
3156 (info->default_timeout ? info->default_timeout : 0x02));
3157 /* 10ms rx timeout */
3159 if (C_CLOCAL(info->port.tty)) {
3160 /* without modem intr */
3161 cy_writeb(base_addr + (CySRER << index),
3162 readb(base_addr + (CySRER << index)) | CyMdmCh);
3163 /* act on 1->0 modem transitions */
3164 if ((cflag & CRTSCTS) && info->rflow) {
3165 cy_writeb(base_addr + (CyMCOR1 << index),
3166 (CyCTS | rflow_thr[i]));
3168 cy_writeb(base_addr + (CyMCOR1 << index),
3171 /* act on 0->1 modem transitions */
3172 cy_writeb(base_addr + (CyMCOR2 << index), CyCTS);
3174 /* without modem intr */
3175 cy_writeb(base_addr + (CySRER << index),
3177 (CySRER << index)) | CyMdmCh);
3178 /* act on 1->0 modem transitions */
3179 if ((cflag & CRTSCTS) && info->rflow) {
3180 cy_writeb(base_addr + (CyMCOR1 << index),
3181 (CyDSR | CyCTS | CyRI | CyDCD |
3184 cy_writeb(base_addr + (CyMCOR1 << index),
3185 CyDSR | CyCTS | CyRI | CyDCD);
3187 /* act on 0->1 modem transitions */
3188 cy_writeb(base_addr + (CyMCOR2 << index),
3189 CyDSR | CyCTS | CyRI | CyDCD);
3192 if (i == 0) { /* baud rate is zero, turn off line */
3193 if (info->rtsdtr_inv) {
3194 cy_writeb(base_addr + (CyMSVR1 << index),
3197 cy_writeb(base_addr + (CyMSVR2 << index),
3201 printk(KERN_DEBUG "cyc:set_line_char dropping DTR\n");
3202 printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
3203 readb(base_addr + (CyMSVR1 << index)),
3204 readb(base_addr + (CyMSVR2 << index)));
3207 if (info->rtsdtr_inv) {
3208 cy_writeb(base_addr + (CyMSVR1 << index),
3211 cy_writeb(base_addr + (CyMSVR2 << index),
3215 printk(KERN_DEBUG "cyc:set_line_char raising DTR\n");
3216 printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
3217 readb(base_addr + (CyMSVR1 << index)),
3218 readb(base_addr + (CyMSVR2 << index)));
3223 clear_bit(TTY_IO_ERROR, &info->port.tty->flags);
3224 spin_unlock_irqrestore(&card->card_lock, flags);
3227 struct FIRM_ID __iomem *firm_id;
3228 struct ZFW_CTRL __iomem *zfw_ctrl;
3229 struct BOARD_CTRL __iomem *board_ctrl;
3230 struct CH_CTRL __iomem *ch_ctrl;
3231 struct BUF_CTRL __iomem *buf_ctrl;
3235 firm_id = card->base_addr + ID_ADDRESS;
3236 if (!cyz_is_loaded(card))
3239 zfw_ctrl = card->base_addr +
3240 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
3241 board_ctrl = &zfw_ctrl->board_ctrl;
3242 ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]);
3243 buf_ctrl = &zfw_ctrl->buf_ctrl[channel];
3246 baud = tty_get_baud_rate(info->port.tty);
3247 if (baud == 38400 && (info->port.flags & ASYNC_SPD_MASK) ==
3249 if (info->custom_divisor)
3250 baud_rate = info->baud / info->custom_divisor;
3252 baud_rate = info->baud;
3253 } else if (baud > CYZ_MAX_SPEED) {
3254 baud = CYZ_MAX_SPEED;
3256 cy_writel(&ch_ctrl->comm_baud, baud);
3259 /* get it right for 134.5 baud */
3260 info->timeout = (info->xmit_fifo_size * HZ * 30 / 269) +
3262 } else if (baud == 38400 && (info->port.flags & ASYNC_SPD_MASK) ==
3264 info->timeout = (info->xmit_fifo_size * HZ * 15 /
3267 info->timeout = (info->xmit_fifo_size * HZ * 15 /
3269 /* this needs to be propagated into the card info */
3274 /* byte size and parity */
3275 switch (cflag & CSIZE) {
3277 cy_writel(&ch_ctrl->comm_data_l, C_DL_CS5);
3280 cy_writel(&ch_ctrl->comm_data_l, C_DL_CS6);
3283 cy_writel(&ch_ctrl->comm_data_l, C_DL_CS7);
3286 cy_writel(&ch_ctrl->comm_data_l, C_DL_CS8);
3289 if (cflag & CSTOPB) {
3290 cy_writel(&ch_ctrl->comm_data_l,
3291 readl(&ch_ctrl->comm_data_l) | C_DL_2STOP);
3293 cy_writel(&ch_ctrl->comm_data_l,
3294 readl(&ch_ctrl->comm_data_l) | C_DL_1STOP);
3296 if (cflag & PARENB) {
3298 cy_writel(&ch_ctrl->comm_parity, C_PR_ODD);
3300 cy_writel(&ch_ctrl->comm_parity, C_PR_EVEN);
3302 cy_writel(&ch_ctrl->comm_parity, C_PR_NONE);
3304 /* CTS flow control flag */
3305 if (cflag & CRTSCTS) {
3306 cy_writel(&ch_ctrl->hw_flow,
3307 readl(&ch_ctrl->hw_flow) | C_RS_CTS | C_RS_RTS);
3309 cy_writel(&ch_ctrl->hw_flow, readl(&ch_ctrl->hw_flow) &
3310 ~(C_RS_CTS | C_RS_RTS));
3312 /* As the HW flow control is done in firmware, the driver
3313 doesn't need to care about it */
3314 info->port.flags &= ~ASYNC_CTS_FLOW;
3316 /* XON/XOFF/XANY flow control flags */
3319 sw_flow |= C_FL_OXX;
3321 sw_flow |= C_FL_OIXANY;
3323 cy_writel(&ch_ctrl->sw_flow, sw_flow);
3325 retval = cyz_issue_cmd(card, channel, C_CM_IOCTL, 0L);
3327 printk(KERN_ERR "cyc:set_line_char retval on ttyC%d "
3328 "was %x\n", info->line, retval);
3331 /* CD sensitivity */
3333 info->port.flags &= ~ASYNC_CHECK_CD;
3335 info->port.flags |= ASYNC_CHECK_CD;
3337 if (baud == 0) { /* baud rate is zero, turn off line */
3338 cy_writel(&ch_ctrl->rs_control,
3339 readl(&ch_ctrl->rs_control) & ~C_RS_DTR);
3341 printk(KERN_DEBUG "cyc:set_line_char dropping Z DTR\n");
3344 cy_writel(&ch_ctrl->rs_control,
3345 readl(&ch_ctrl->rs_control) | C_RS_DTR);
3347 printk(KERN_DEBUG "cyc:set_line_char raising Z DTR\n");
3351 retval = cyz_issue_cmd(card, channel, C_CM_IOCTLM, 0L);
3353 printk(KERN_ERR "cyc:set_line_char(2) retval on ttyC%d "
3354 "was %x\n", info->line, retval);
3358 clear_bit(TTY_IO_ERROR, &info->port.tty->flags);
3360 } /* set_line_char */
3363 get_serial_info(struct cyclades_port *info,
3364 struct serial_struct __user *retinfo)
3366 struct serial_struct tmp;
3367 struct cyclades_card *cinfo = info->card;
3371 memset(&tmp, 0, sizeof(tmp));
3372 tmp.type = info->type;
3373 tmp.line = info->line;
3374 tmp.port = (info->card - cy_card) * 0x100 + info->line -
3376 tmp.irq = cinfo->irq;
3377 tmp.flags = info->port.flags;
3378 tmp.close_delay = info->port.close_delay;
3379 tmp.closing_wait = info->port.closing_wait;
3380 tmp.baud_base = info->baud;
3381 tmp.custom_divisor = info->custom_divisor;
3382 tmp.hub6 = 0; /*!!! */
3383 return copy_to_user(retinfo, &tmp, sizeof(*retinfo)) ? -EFAULT : 0;
3384 } /* get_serial_info */
3387 set_serial_info(struct cyclades_port *info,
3388 struct serial_struct __user *new_info)
3390 struct serial_struct new_serial;
3391 struct cyclades_port old_info;
3393 if (copy_from_user(&new_serial, new_info, sizeof(new_serial)))
3397 if (!capable(CAP_SYS_ADMIN)) {
3398 if (new_serial.close_delay != info->port.close_delay ||
3399 new_serial.baud_base != info->baud ||
3400 (new_serial.flags & ASYNC_FLAGS &
3402 (info->port.flags & ASYNC_FLAGS & ~ASYNC_USR_MASK))
3404 info->port.flags = (info->port.flags & ~ASYNC_USR_MASK) |
3405 (new_serial.flags & ASYNC_USR_MASK);
3406 info->baud = new_serial.baud_base;
3407 info->custom_divisor = new_serial.custom_divisor;
3408 goto check_and_exit;
3412 * OK, past this point, all the error checking has been done.
3413 * At this point, we start making changes.....
3416 info->baud = new_serial.baud_base;
3417 info->custom_divisor = new_serial.custom_divisor;
3418 info->port.flags = (info->port.flags & ~ASYNC_FLAGS) |
3419 (new_serial.flags & ASYNC_FLAGS);
3420 info->port.close_delay = new_serial.close_delay * HZ / 100;
3421 info->port.closing_wait = new_serial.closing_wait * HZ / 100;
3424 if (info->port.flags & ASYNC_INITIALIZED) {
3425 set_line_char(info);
3428 return startup(info);
3430 } /* set_serial_info */
3433 * get_lsr_info - get line status register info
3435 * Purpose: Let user call ioctl() to get info when the UART physically
3436 * is emptied. On bus types like RS485, the transmitter must
3437 * release the bus after transmitting. This must be done when
3438 * the transmit shift register is empty, not be done when the
3439 * transmit holding register is empty. This functionality
3440 * allows an RS485 driver to be written in user space.
3442 static int get_lsr_info(struct cyclades_port *info, unsigned int __user *value)
3444 struct cyclades_card *card;
3445 int chip, channel, index;
3446 unsigned char status;
3447 unsigned int result;
3448 unsigned long flags;
3449 void __iomem *base_addr;
3452 channel = (info->line) - (card->first_line);
3453 if (!cy_is_Z(card)) {
3454 chip = channel >> 2;
3456 index = card->bus_index;
3457 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3459 spin_lock_irqsave(&card->card_lock, flags);
3460 status = readb(base_addr + (CySRER << index)) &
3461 (CyTxRdy | CyTxMpty);
3462 spin_unlock_irqrestore(&card->card_lock, flags);
3463 result = (status ? 0 : TIOCSER_TEMT);
3465 /* Not supported yet */
3468 return put_user(result, (unsigned long __user *)value);
3471 static int cy_tiocmget(struct tty_struct *tty, struct file *file)
3473 struct cyclades_port *info = tty->driver_data;
3474 struct cyclades_card *card;
3475 int chip, channel, index;
3476 void __iomem *base_addr;
3477 unsigned long flags;
3478 unsigned char status;
3479 unsigned long lstatus;
3480 unsigned int result;
3481 struct FIRM_ID __iomem *firm_id;
3482 struct ZFW_CTRL __iomem *zfw_ctrl;
3483 struct BOARD_CTRL __iomem *board_ctrl;
3484 struct CH_CTRL __iomem *ch_ctrl;
3486 if (serial_paranoia_check(info, tty->name, __func__))
3492 channel = info->line - card->first_line;
3493 if (!cy_is_Z(card)) {
3494 chip = channel >> 2;
3496 index = card->bus_index;
3497 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3499 spin_lock_irqsave(&card->card_lock, flags);
3500 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
3501 status = readb(base_addr + (CyMSVR1 << index));
3502 status |= readb(base_addr + (CyMSVR2 << index));
3503 spin_unlock_irqrestore(&card->card_lock, flags);
3505 if (info->rtsdtr_inv) {
3506 result = ((status & CyRTS) ? TIOCM_DTR : 0) |
3507 ((status & CyDTR) ? TIOCM_RTS : 0);
3509 result = ((status & CyRTS) ? TIOCM_RTS : 0) |
3510 ((status & CyDTR) ? TIOCM_DTR : 0);
3512 result |= ((status & CyDCD) ? TIOCM_CAR : 0) |
3513 ((status & CyRI) ? TIOCM_RNG : 0) |
3514 ((status & CyDSR) ? TIOCM_DSR : 0) |
3515 ((status & CyCTS) ? TIOCM_CTS : 0);
3517 base_addr = card->base_addr;
3518 firm_id = card->base_addr + ID_ADDRESS;
3519 if (cyz_is_loaded(card)) {
3520 zfw_ctrl = card->base_addr +
3521 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
3522 board_ctrl = &zfw_ctrl->board_ctrl;
3523 ch_ctrl = zfw_ctrl->ch_ctrl;
3524 lstatus = readl(&ch_ctrl[channel].rs_status);
3525 result = ((lstatus & C_RS_RTS) ? TIOCM_RTS : 0) |
3526 ((lstatus & C_RS_DTR) ? TIOCM_DTR : 0) |
3527 ((lstatus & C_RS_DCD) ? TIOCM_CAR : 0) |
3528 ((lstatus & C_RS_RI) ? TIOCM_RNG : 0) |
3529 ((lstatus & C_RS_DSR) ? TIOCM_DSR : 0) |
3530 ((lstatus & C_RS_CTS) ? TIOCM_CTS : 0);
3543 cy_tiocmset(struct tty_struct *tty, struct file *file,
3544 unsigned int set, unsigned int clear)
3546 struct cyclades_port *info = tty->driver_data;
3547 struct cyclades_card *card;
3548 int chip, channel, index;
3549 void __iomem *base_addr;
3550 unsigned long flags;
3551 struct FIRM_ID __iomem *firm_id;
3552 struct ZFW_CTRL __iomem *zfw_ctrl;
3553 struct BOARD_CTRL __iomem *board_ctrl;
3554 struct CH_CTRL __iomem *ch_ctrl;
3557 if (serial_paranoia_check(info, tty->name, __func__))
3561 channel = (info->line) - (card->first_line);
3562 if (!cy_is_Z(card)) {
3563 chip = channel >> 2;
3565 index = card->bus_index;
3566 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3568 if (set & TIOCM_RTS) {
3569 spin_lock_irqsave(&card->card_lock, flags);
3570 cy_writeb(base_addr + (CyCAR << index),
3572 if (info->rtsdtr_inv) {
3573 cy_writeb(base_addr + (CyMSVR2 << index),
3576 cy_writeb(base_addr + (CyMSVR1 << index),
3579 spin_unlock_irqrestore(&card->card_lock, flags);
3581 if (clear & TIOCM_RTS) {
3582 spin_lock_irqsave(&card->card_lock, flags);
3583 cy_writeb(base_addr + (CyCAR << index),
3585 if (info->rtsdtr_inv) {
3586 cy_writeb(base_addr + (CyMSVR2 << index),
3589 cy_writeb(base_addr + (CyMSVR1 << index),
3592 spin_unlock_irqrestore(&card->card_lock, flags);
3594 if (set & TIOCM_DTR) {
3595 spin_lock_irqsave(&card->card_lock, flags);
3596 cy_writeb(base_addr + (CyCAR << index),
3598 if (info->rtsdtr_inv) {
3599 cy_writeb(base_addr + (CyMSVR1 << index),
3602 cy_writeb(base_addr + (CyMSVR2 << index),
3606 printk(KERN_DEBUG "cyc:set_modem_info raising DTR\n");
3607 printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
3608 readb(base_addr + (CyMSVR1 << index)),
3609 readb(base_addr + (CyMSVR2 << index)));
3611 spin_unlock_irqrestore(&card->card_lock, flags);
3613 if (clear & TIOCM_DTR) {
3614 spin_lock_irqsave(&card->card_lock, flags);
3615 cy_writeb(base_addr + (CyCAR << index),
3617 if (info->rtsdtr_inv) {
3618 cy_writeb(base_addr + (CyMSVR1 << index),
3621 cy_writeb(base_addr + (CyMSVR2 << index),
3626 printk(KERN_DEBUG "cyc:set_modem_info dropping DTR\n");
3627 printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
3628 readb(base_addr + (CyMSVR1 << index)),
3629 readb(base_addr + (CyMSVR2 << index)));
3631 spin_unlock_irqrestore(&card->card_lock, flags);
3634 base_addr = card->base_addr;
3636 firm_id = card->base_addr + ID_ADDRESS;
3637 if (cyz_is_loaded(card)) {
3638 zfw_ctrl = card->base_addr +
3639 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
3640 board_ctrl = &zfw_ctrl->board_ctrl;
3641 ch_ctrl = zfw_ctrl->ch_ctrl;
3643 if (set & TIOCM_RTS) {
3644 spin_lock_irqsave(&card->card_lock, flags);
3645 cy_writel(&ch_ctrl[channel].rs_control,
3646 readl(&ch_ctrl[channel].rs_control) |
3648 spin_unlock_irqrestore(&card->card_lock, flags);
3650 if (clear & TIOCM_RTS) {
3651 spin_lock_irqsave(&card->card_lock, flags);
3652 cy_writel(&ch_ctrl[channel].rs_control,
3653 readl(&ch_ctrl[channel].rs_control) &
3655 spin_unlock_irqrestore(&card->card_lock, flags);
3657 if (set & TIOCM_DTR) {
3658 spin_lock_irqsave(&card->card_lock, flags);
3659 cy_writel(&ch_ctrl[channel].rs_control,
3660 readl(&ch_ctrl[channel].rs_control) |
3663 printk(KERN_DEBUG "cyc:set_modem_info raising "
3666 spin_unlock_irqrestore(&card->card_lock, flags);
3668 if (clear & TIOCM_DTR) {
3669 spin_lock_irqsave(&card->card_lock, flags);
3670 cy_writel(&ch_ctrl[channel].rs_control,
3671 readl(&ch_ctrl[channel].rs_control) &
3674 printk(KERN_DEBUG "cyc:set_modem_info clearing "
3677 spin_unlock_irqrestore(&card->card_lock, flags);
3682 spin_lock_irqsave(&card->card_lock, flags);
3683 retval = cyz_issue_cmd(card, channel, C_CM_IOCTLM, 0L);
3685 printk(KERN_ERR "cyc:set_modem_info retval on ttyC%d "
3686 "was %x\n", info->line, retval);
3688 spin_unlock_irqrestore(&card->card_lock, flags);
3694 * cy_break() --- routine which turns the break handling on or off
3696 static int cy_break(struct tty_struct *tty, int break_state)
3698 struct cyclades_port *info = tty->driver_data;
3699 struct cyclades_card *card;
3700 unsigned long flags;
3703 if (serial_paranoia_check(info, tty->name, "cy_break"))
3708 spin_lock_irqsave(&card->card_lock, flags);
3709 if (!cy_is_Z(card)) {
3710 /* Let the transmit ISR take care of this (since it
3711 requires stuffing characters into the output stream).
3713 if (break_state == -1) {
3714 if (!info->breakon) {
3716 if (!info->xmit_cnt) {
3717 spin_unlock_irqrestore(&card->card_lock, flags);
3719 spin_lock_irqsave(&card->card_lock, flags);
3723 if (!info->breakoff) {
3725 if (!info->xmit_cnt) {
3726 spin_unlock_irqrestore(&card->card_lock, flags);
3728 spin_lock_irqsave(&card->card_lock, flags);
3733 if (break_state == -1) {
3734 retval = cyz_issue_cmd(card,
3735 info->line - card->first_line,
3736 C_CM_SET_BREAK, 0L);
3738 printk(KERN_ERR "cyc:cy_break (set) retval on "
3739 "ttyC%d was %x\n", info->line, retval);
3742 retval = cyz_issue_cmd(card,
3743 info->line - card->first_line,
3744 C_CM_CLR_BREAK, 0L);
3746 printk(KERN_DEBUG "cyc:cy_break (clr) retval "
3747 "on ttyC%d was %x\n", info->line,
3752 spin_unlock_irqrestore(&card->card_lock, flags);
3756 static int get_mon_info(struct cyclades_port *info,
3757 struct cyclades_monitor __user *mon)
3760 if (copy_to_user(mon, &info->mon, sizeof(struct cyclades_monitor)))
3762 info->mon.int_count = 0;
3763 info->mon.char_count = 0;
3764 info->mon.char_max = 0;
3765 info->mon.char_last = 0;
3767 } /* get_mon_info */
3769 static int set_threshold(struct cyclades_port *info, unsigned long value)
3771 struct cyclades_card *card;
3772 void __iomem *base_addr;
3773 int channel, chip, index;
3774 unsigned long flags;
3777 channel = info->line - card->first_line;
3778 if (!cy_is_Z(card)) {
3779 chip = channel >> 2;
3781 index = card->bus_index;
3783 card->base_addr + (cy_chip_offset[chip] << index);
3785 info->cor3 &= ~CyREC_FIFO;
3786 info->cor3 |= value & CyREC_FIFO;
3788 spin_lock_irqsave(&card->card_lock, flags);
3789 cy_writeb(base_addr + (CyCOR3 << index), info->cor3);
3790 cyy_issue_cmd(base_addr, CyCOR_CHANGE | CyCOR3ch, index);
3791 spin_unlock_irqrestore(&card->card_lock, flags);
3794 } /* set_threshold */
3796 static int get_threshold(struct cyclades_port *info,
3797 unsigned long __user *value)
3799 struct cyclades_card *card;
3800 void __iomem *base_addr;
3801 int channel, chip, index;
3805 channel = info->line - card->first_line;
3806 if (!cy_is_Z(card)) {
3807 chip = channel >> 2;
3809 index = card->bus_index;
3810 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3812 tmp = readb(base_addr + (CyCOR3 << index)) & CyREC_FIFO;
3813 return put_user(tmp, value);
3816 } /* get_threshold */
3818 static int set_default_threshold(struct cyclades_port *info,
3819 unsigned long value)
3821 info->default_threshold = value & 0x0f;
3823 } /* set_default_threshold */
3825 static int get_default_threshold(struct cyclades_port *info,
3826 unsigned long __user *value)
3828 return put_user(info->default_threshold, value);
3829 } /* get_default_threshold */
3831 static int set_timeout(struct cyclades_port *info, unsigned long value)
3833 struct cyclades_card *card;
3834 void __iomem *base_addr;
3835 int channel, chip, index;
3836 unsigned long flags;
3839 channel = info->line - card->first_line;
3840 if (!cy_is_Z(card)) {
3841 chip = channel >> 2;
3843 index = card->bus_index;
3844 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3846 spin_lock_irqsave(&card->card_lock, flags);
3847 cy_writeb(base_addr + (CyRTPR << index), value & 0xff);
3848 spin_unlock_irqrestore(&card->card_lock, flags);
3853 static int get_timeout(struct cyclades_port *info,
3854 unsigned long __user *value)
3856 struct cyclades_card *card;
3857 void __iomem *base_addr;
3858 int channel, chip, index;
3862 channel = info->line - card->first_line;
3863 if (!cy_is_Z(card)) {
3864 chip = channel >> 2;
3866 index = card->bus_index;
3867 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3869 tmp = readb(base_addr + (CyRTPR << index));
3870 return put_user(tmp, value);
3875 static int set_default_timeout(struct cyclades_port *info, unsigned long value)
3877 info->default_timeout = value & 0xff;
3879 } /* set_default_timeout */
3881 static int get_default_timeout(struct cyclades_port *info,
3882 unsigned long __user *value)
3884 return put_user(info->default_timeout, value);
3885 } /* get_default_timeout */
3888 * This routine allows the tty driver to implement device-
3889 * specific ioctl's. If the ioctl number passed in cmd is
3890 * not recognized by the driver, it should return ENOIOCTLCMD.
3893 cy_ioctl(struct tty_struct *tty, struct file *file,
3894 unsigned int cmd, unsigned long arg)
3896 struct cyclades_port *info = tty->driver_data;
3897 struct cyclades_icount cprev, cnow; /* kernel counter temps */
3898 struct serial_icounter_struct __user *p_cuser; /* user space */
3900 unsigned long flags;
3901 void __user *argp = (void __user *)arg;
3903 if (serial_paranoia_check(info, tty->name, "cy_ioctl"))
3906 #ifdef CY_DEBUG_OTHER
3907 printk(KERN_DEBUG "cyc:cy_ioctl ttyC%d, cmd = %x arg = %lx\n",
3908 info->line, cmd, arg);
3914 ret_val = get_mon_info(info, argp);
3917 ret_val = get_threshold(info, argp);
3920 ret_val = set_threshold(info, arg);
3922 case CYGETDEFTHRESH:
3923 ret_val = get_default_threshold(info, argp);
3925 case CYSETDEFTHRESH:
3926 ret_val = set_default_threshold(info, arg);
3929 ret_val = get_timeout(info, argp);
3932 ret_val = set_timeout(info, arg);
3934 case CYGETDEFTIMEOUT:
3935 ret_val = get_default_timeout(info, argp);
3937 case CYSETDEFTIMEOUT:
3938 ret_val = set_default_timeout(info, arg);
3941 info->rflow = (int)arg;
3945 ret_val = info->rflow;
3947 case CYSETRTSDTR_INV:
3948 info->rtsdtr_inv = (int)arg;
3951 case CYGETRTSDTR_INV:
3952 ret_val = info->rtsdtr_inv;
3954 case CYGETCD1400VER:
3955 ret_val = info->chip_rev;
3957 #ifndef CONFIG_CYZ_INTR
3958 case CYZSETPOLLCYCLE:
3959 cyz_polling_cycle = (arg * HZ) / 1000;
3962 case CYZGETPOLLCYCLE:
3963 ret_val = (cyz_polling_cycle * 1000) / HZ;
3965 #endif /* CONFIG_CYZ_INTR */
3967 info->port.closing_wait = (unsigned short)arg * HZ / 100;
3971 ret_val = info->port.closing_wait / (HZ / 100);
3974 ret_val = get_serial_info(info, argp);
3977 ret_val = set_serial_info(info, argp);
3979 case TIOCSERGETLSR: /* Get line status register */
3980 ret_val = get_lsr_info(info, argp);
3983 * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
3984 * - mask passed in arg for lines of interest
3985 * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
3986 * Caller should use TIOCGICOUNT to see which one it was
3989 spin_lock_irqsave(&info->card->card_lock, flags);
3990 /* note the counters on entry */
3991 cnow = info->icount;
3992 spin_unlock_irqrestore(&info->card->card_lock, flags);
3993 ret_val = wait_event_interruptible(info->delta_msr_wait, ({
3995 spin_lock_irqsave(&info->card->card_lock, flags);
3996 cnow = info->icount; /* atomic copy */
3997 spin_unlock_irqrestore(&info->card->card_lock, flags);
3999 ((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
4000 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
4001 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) ||
4002 ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts));
4007 * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
4008 * Return: write counters to the user passed counter struct
4009 * NB: both 1->0 and 0->1 transitions are counted except for
4010 * RI where only 0->1 is counted.
4013 spin_lock_irqsave(&info->card->card_lock, flags);
4014 cnow = info->icount;
4015 spin_unlock_irqrestore(&info->card->card_lock, flags);
4017 ret_val = put_user(cnow.cts, &p_cuser->cts);
4020 ret_val = put_user(cnow.dsr, &p_cuser->dsr);
4023 ret_val = put_user(cnow.rng, &p_cuser->rng);
4026 ret_val = put_user(cnow.dcd, &p_cuser->dcd);
4029 ret_val = put_user(cnow.rx, &p_cuser->rx);
4032 ret_val = put_user(cnow.tx, &p_cuser->tx);
4035 ret_val = put_user(cnow.frame, &p_cuser->frame);
4038 ret_val = put_user(cnow.overrun, &p_cuser->overrun);
4041 ret_val = put_user(cnow.parity, &p_cuser->parity);
4044 ret_val = put_user(cnow.brk, &p_cuser->brk);
4047 ret_val = put_user(cnow.buf_overrun, &p_cuser->buf_overrun);
4053 ret_val = -ENOIOCTLCMD;
4057 #ifdef CY_DEBUG_OTHER
4058 printk(KERN_DEBUG "cyc:cy_ioctl done\n");
4064 * This routine allows the tty driver to be notified when
4065 * device's termios settings have changed. Note that a
4066 * well-designed tty driver should be prepared to accept the case
4067 * where old == NULL, and try to do something rational.
4069 static void cy_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
4071 struct cyclades_port *info = tty->driver_data;
4073 #ifdef CY_DEBUG_OTHER
4074 printk(KERN_DEBUG "cyc:cy_set_termios ttyC%d\n", info->line);
4077 set_line_char(info);
4079 if ((old_termios->c_cflag & CRTSCTS) &&
4080 !(tty->termios->c_cflag & CRTSCTS)) {
4081 tty->hw_stopped = 0;
4086 * No need to wake up processes in open wait, since they
4087 * sample the CLOCAL flag once, and don't recheck it.
4088 * XXX It's not clear whether the current behavior is correct
4089 * or not. Hence, this may change.....
4091 if (!(old_termios->c_cflag & CLOCAL) &&
4092 (tty->termios->c_cflag & CLOCAL))
4093 wake_up_interruptible(&info->port.open_wait);
4095 } /* cy_set_termios */
4097 /* This function is used to send a high-priority XON/XOFF character to
4100 static void cy_send_xchar(struct tty_struct *tty, char ch)
4102 struct cyclades_port *info = tty->driver_data;
4103 struct cyclades_card *card;
4106 if (serial_paranoia_check(info, tty->name, "cy_send_xchar"))
4115 channel = info->line - card->first_line;
4117 if (cy_is_Z(card)) {
4118 if (ch == STOP_CHAR(tty))
4119 cyz_issue_cmd(card, channel, C_CM_SENDXOFF, 0L);
4120 else if (ch == START_CHAR(tty))
4121 cyz_issue_cmd(card, channel, C_CM_SENDXON, 0L);
4125 /* This routine is called by the upper-layer tty layer to signal
4126 that incoming characters should be throttled because the input
4127 buffers are close to full.
4129 static void cy_throttle(struct tty_struct *tty)
4131 struct cyclades_port *info = tty->driver_data;
4132 struct cyclades_card *card;
4133 unsigned long flags;
4134 void __iomem *base_addr;
4135 int chip, channel, index;
4137 #ifdef CY_DEBUG_THROTTLE
4140 printk(KERN_DEBUG "cyc:throttle %s: %ld...ttyC%d\n", tty_name(tty, buf),
4141 tty->ldisc.chars_in_buffer(tty), info->line);
4144 if (serial_paranoia_check(info, tty->name, "cy_throttle"))
4151 cy_send_xchar(tty, STOP_CHAR(tty));
4156 if (tty->termios->c_cflag & CRTSCTS) {
4157 channel = info->line - card->first_line;
4158 if (!cy_is_Z(card)) {
4159 chip = channel >> 2;
4161 index = card->bus_index;
4162 base_addr = card->base_addr +
4163 (cy_chip_offset[chip] << index);
4165 spin_lock_irqsave(&card->card_lock, flags);
4166 cy_writeb(base_addr + (CyCAR << index),
4168 if (info->rtsdtr_inv) {
4169 cy_writeb(base_addr + (CyMSVR2 << index),
4172 cy_writeb(base_addr + (CyMSVR1 << index),
4175 spin_unlock_irqrestore(&card->card_lock, flags);
4183 * This routine notifies the tty driver that it should signal
4184 * that characters can now be sent to the tty without fear of
4185 * overrunning the input buffers of the line disciplines.
4187 static void cy_unthrottle(struct tty_struct *tty)
4189 struct cyclades_port *info = tty->driver_data;
4190 struct cyclades_card *card;
4191 unsigned long flags;
4192 void __iomem *base_addr;
4193 int chip, channel, index;
4195 #ifdef CY_DEBUG_THROTTLE
4198 printk(KERN_DEBUG "cyc:unthrottle %s: %ld...ttyC%d\n",
4199 tty_name(tty, buf), tty_chars_in_buffer(tty), info->line);
4202 if (serial_paranoia_check(info, tty->name, "cy_unthrottle"))
4209 cy_send_xchar(tty, START_CHAR(tty));
4212 if (tty->termios->c_cflag & CRTSCTS) {
4214 channel = info->line - card->first_line;
4215 if (!cy_is_Z(card)) {
4216 chip = channel >> 2;
4218 index = card->bus_index;
4219 base_addr = card->base_addr +
4220 (cy_chip_offset[chip] << index);
4222 spin_lock_irqsave(&card->card_lock, flags);
4223 cy_writeb(base_addr + (CyCAR << index),
4225 if (info->rtsdtr_inv) {
4226 cy_writeb(base_addr + (CyMSVR2 << index),
4229 cy_writeb(base_addr + (CyMSVR1 << index),
4232 spin_unlock_irqrestore(&card->card_lock, flags);
4237 } /* cy_unthrottle */
4239 /* cy_start and cy_stop provide software output flow control as a
4240 function of XON/XOFF, software CTS, and other such stuff.
4242 static void cy_stop(struct tty_struct *tty)
4244 struct cyclades_card *cinfo;
4245 struct cyclades_port *info = tty->driver_data;
4246 void __iomem *base_addr;
4247 int chip, channel, index;
4248 unsigned long flags;
4250 #ifdef CY_DEBUG_OTHER
4251 printk(KERN_DEBUG "cyc:cy_stop ttyC%d\n", info->line);
4254 if (serial_paranoia_check(info, tty->name, "cy_stop"))
4258 channel = info->line - cinfo->first_line;
4259 if (!cy_is_Z(cinfo)) {
4260 index = cinfo->bus_index;
4261 chip = channel >> 2;
4263 base_addr = cinfo->base_addr + (cy_chip_offset[chip] << index);
4265 spin_lock_irqsave(&cinfo->card_lock, flags);
4266 cy_writeb(base_addr + (CyCAR << index),
4267 (u_char)(channel & 0x0003)); /* index channel */
4268 cy_writeb(base_addr + (CySRER << index),
4269 readb(base_addr + (CySRER << index)) & ~CyTxRdy);
4270 spin_unlock_irqrestore(&cinfo->card_lock, flags);
4274 static void cy_start(struct tty_struct *tty)
4276 struct cyclades_card *cinfo;
4277 struct cyclades_port *info = tty->driver_data;
4278 void __iomem *base_addr;
4279 int chip, channel, index;
4280 unsigned long flags;
4282 #ifdef CY_DEBUG_OTHER
4283 printk(KERN_DEBUG "cyc:cy_start ttyC%d\n", info->line);
4286 if (serial_paranoia_check(info, tty->name, "cy_start"))
4290 channel = info->line - cinfo->first_line;
4291 index = cinfo->bus_index;
4292 if (!cy_is_Z(cinfo)) {
4293 chip = channel >> 2;
4295 base_addr = cinfo->base_addr + (cy_chip_offset[chip] << index);
4297 spin_lock_irqsave(&cinfo->card_lock, flags);
4298 cy_writeb(base_addr + (CyCAR << index),
4299 (u_char) (channel & 0x0003)); /* index channel */
4300 cy_writeb(base_addr + (CySRER << index),
4301 readb(base_addr + (CySRER << index)) | CyTxRdy);
4302 spin_unlock_irqrestore(&cinfo->card_lock, flags);
4307 * cy_hangup() --- called by tty_hangup() when a hangup is signaled.
4309 static void cy_hangup(struct tty_struct *tty)
4311 struct cyclades_port *info = tty->driver_data;
4313 #ifdef CY_DEBUG_OTHER
4314 printk(KERN_DEBUG "cyc:cy_hangup ttyC%d\n", info->line);
4317 if (serial_paranoia_check(info, tty->name, "cy_hangup"))
4320 cy_flush_buffer(tty);
4322 info->port.count = 0;
4323 #ifdef CY_DEBUG_COUNT
4324 printk(KERN_DEBUG "cyc:cy_hangup (%d): setting count to 0\n",
4327 info->port.tty = NULL;
4328 info->port.flags &= ~ASYNC_NORMAL_ACTIVE;
4329 wake_up_interruptible(&info->port.open_wait);
4333 * ---------------------------------------------------------------------
4334 * cy_init() and friends
4336 * cy_init() is called at boot-time to initialize the serial driver.
4337 * ---------------------------------------------------------------------
4340 static int __devinit cy_init_card(struct cyclades_card *cinfo)
4342 struct cyclades_port *info;
4343 unsigned int nports, port;
4344 unsigned short chip_number;
4345 int uninitialized_var(index);
4347 spin_lock_init(&cinfo->card_lock);
4349 if (cy_is_Z(cinfo)) { /* Cyclades-Z */
4350 nports = (cinfo->hw_ver == ZE_V1) ? ZE_V1_NPORTS : 8;
4351 cinfo->intr_enabled = 0;
4352 cinfo->nports = 0; /* Will be correctly set later, after
4355 index = cinfo->bus_index;
4356 nports = cinfo->nports = CyPORTS_PER_CHIP * cinfo->num_chips;
4359 cinfo->ports = kzalloc(sizeof(*cinfo->ports) * nports, GFP_KERNEL);
4360 if (cinfo->ports == NULL) {
4361 printk(KERN_ERR "Cyclades: cannot allocate ports\n");
4366 for (port = cinfo->first_line; port < cinfo->first_line + nports;
4368 info = &cinfo->ports[port - cinfo->first_line];
4369 tty_port_init(&info->port);
4370 info->magic = CYCLADES_MAGIC;
4374 info->port.closing_wait = CLOSING_WAIT_DELAY;
4375 info->port.close_delay = 5 * HZ / 10;
4376 info->port.flags = STD_COM_FLAGS;
4377 init_completion(&info->shutdown_wait);
4378 init_waitqueue_head(&info->delta_msr_wait);
4380 if (cy_is_Z(cinfo)) {
4381 info->type = PORT_STARTECH;
4382 if (cinfo->hw_ver == ZO_V1)
4383 info->xmit_fifo_size = CYZ_FIFO_SIZE;
4385 info->xmit_fifo_size = 4 * CYZ_FIFO_SIZE;
4386 #ifdef CONFIG_CYZ_INTR
4387 setup_timer(&cyz_rx_full_timer[port],
4388 cyz_rx_restart, (unsigned long)info);
4391 info->type = PORT_CIRRUS;
4392 info->xmit_fifo_size = CyMAX_CHAR_FIFO;
4393 info->cor1 = CyPARITY_NONE | Cy_1_STOP | Cy_8_BITS;
4395 info->cor3 = 0x08; /* _very_ small rcv threshold */
4397 chip_number = (port - cinfo->first_line) / 4;
4398 info->chip_rev = readb(cinfo->base_addr +
4399 (cy_chip_offset[chip_number] << index) +
4400 (CyGFRCR << index));
4402 if (info->chip_rev >= CD1400_REV_J) {
4403 /* It is a CD1400 rev. J or later */
4404 info->tbpr = baud_bpr_60[13]; /* Tx BPR */
4405 info->tco = baud_co_60[13]; /* Tx CO */
4406 info->rbpr = baud_bpr_60[13]; /* Rx BPR */
4407 info->rco = baud_co_60[13]; /* Rx CO */
4408 info->rtsdtr_inv = 1;
4410 info->tbpr = baud_bpr_25[13]; /* Tx BPR */
4411 info->tco = baud_co_25[13]; /* Tx CO */
4412 info->rbpr = baud_bpr_25[13]; /* Rx BPR */
4413 info->rco = baud_co_25[13]; /* Rx CO */
4414 info->rtsdtr_inv = 0;
4416 info->read_status_mask = CyTIMEOUT | CySPECHAR |
4417 CyBREAK | CyPARITY | CyFRAME | CyOVERRUN;
4422 #ifndef CONFIG_CYZ_INTR
4423 if (cy_is_Z(cinfo) && !timer_pending(&cyz_timerlist)) {
4424 mod_timer(&cyz_timerlist, jiffies + 1);
4426 printk(KERN_DEBUG "Cyclades-Z polling initialized\n");
4433 /* initialize chips on Cyclom-Y card -- return number of valid
4434 chips (which is number of ports/4) */
4435 static unsigned short __devinit cyy_init_card(void __iomem *true_base_addr,
4438 unsigned int chip_number;
4439 void __iomem *base_addr;
4441 cy_writeb(true_base_addr + (Cy_HwReset << index), 0);
4442 /* Cy_HwReset is 0x1400 */
4443 cy_writeb(true_base_addr + (Cy_ClrIntr << index), 0);
4444 /* Cy_ClrIntr is 0x1800 */
4447 for (chip_number = 0; chip_number < CyMAX_CHIPS_PER_CARD;
4450 true_base_addr + (cy_chip_offset[chip_number] << index);
4452 if (readb(base_addr + (CyCCR << index)) != 0x00) {
4454 printk(" chip #%d at %#6lx is never idle (CCR != 0)\n",
4455 chip_number, (unsigned long)base_addr);
4460 cy_writeb(base_addr + (CyGFRCR << index), 0);
4463 /* The Cyclom-16Y does not decode address bit 9 and therefore
4464 cannot distinguish between references to chip 0 and a non-
4465 existent chip 4. If the preceding clearing of the supposed
4466 chip 4 GFRCR register appears at chip 0, there is no chip 4
4467 and this must be a Cyclom-16Y, not a Cyclom-32Ye.
4469 if (chip_number == 4 && readb(true_base_addr +
4470 (cy_chip_offset[0] << index) +
4471 (CyGFRCR << index)) == 0) {
4475 cy_writeb(base_addr + (CyCCR << index), CyCHIP_RESET);
4478 if (readb(base_addr + (CyGFRCR << index)) == 0x00) {
4480 printk(" chip #%d at %#6lx is not responding ",
4481 chip_number, (unsigned long)base_addr);
4482 printk("(GFRCR stayed 0)\n",
4486 if ((0xf0 & (readb(base_addr + (CyGFRCR << index)))) !=
4489 printk(" chip #%d at %#6lx is not valid (GFRCR == "
4491 chip_number, (unsigned long)base_addr,
4492 base_addr[CyGFRCR<<index]);
4496 cy_writeb(base_addr + (CyGCR << index), CyCH0_SERIAL);
4497 if (readb(base_addr + (CyGFRCR << index)) >= CD1400_REV_J) {
4498 /* It is a CD1400 rev. J or later */
4499 /* Impossible to reach 5ms with this chip.
4500 Changed to 2ms instead (f = 500 Hz). */
4501 cy_writeb(base_addr + (CyPPR << index), CyCLOCK_60_2MS);
4504 cy_writeb(base_addr + (CyPPR << index), CyCLOCK_25_5MS);
4508 printk(" chip #%d at %#6lx is rev 0x%2x\n",
4509 chip_number, (unsigned long)base_addr,
4510 readb(base_addr+(CyGFRCR<<index)));
4514 } /* cyy_init_card */
4517 * ---------------------------------------------------------------------
4518 * cy_detect_isa() - Probe for Cyclom-Y/ISA boards.
4519 * sets global variables and return the number of ISA boards found.
4520 * ---------------------------------------------------------------------
4522 static int __init cy_detect_isa(void)
4525 unsigned short cy_isa_irq, nboard;
4526 void __iomem *cy_isa_address;
4527 unsigned short i, j, cy_isa_nchan;
4535 /* Check for module parameters */
4536 for (i = 0; i < NR_CARDS; i++) {
4537 if (maddr[i] || i) {
4539 cy_isa_addresses[i] = maddr[i];
4546 /* scan the address table probing for Cyclom-Y/ISA boards */
4547 for (i = 0; i < NR_ISA_ADDRS; i++) {
4548 unsigned int isa_address = cy_isa_addresses[i];
4549 if (isa_address == 0x0000)
4552 /* probe for CD1400... */
4553 cy_isa_address = ioremap_nocache(isa_address, CyISA_Ywin);
4554 if (cy_isa_address == NULL) {
4555 printk(KERN_ERR "Cyclom-Y/ISA: can't remap base "
4559 cy_isa_nchan = CyPORTS_PER_CHIP *
4560 cyy_init_card(cy_isa_address, 0);
4561 if (cy_isa_nchan == 0) {
4562 iounmap(cy_isa_address);
4566 if (isparam && irq[i])
4567 cy_isa_irq = irq[i];
4570 /* find out the board's irq by probing */
4571 cy_isa_irq = detect_isa_irq(cy_isa_address);
4572 if (cy_isa_irq == 0) {
4573 printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but the "
4574 "IRQ could not be detected.\n",
4575 (unsigned long)cy_isa_address);
4576 iounmap(cy_isa_address);
4580 if ((cy_next_channel + cy_isa_nchan) > NR_PORTS) {
4581 printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but no "
4582 "more channels are available. Change NR_PORTS "
4583 "in cyclades.c and recompile kernel.\n",
4584 (unsigned long)cy_isa_address);
4585 iounmap(cy_isa_address);
4588 /* fill the next cy_card structure available */
4589 for (j = 0; j < NR_CARDS; j++) {
4590 if (cy_card[j].base_addr == NULL)
4593 if (j == NR_CARDS) { /* no more cy_cards available */
4594 printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but no "
4595 "more cards can be used. Change NR_CARDS in "
4596 "cyclades.c and recompile kernel.\n",
4597 (unsigned long)cy_isa_address);
4598 iounmap(cy_isa_address);
4603 if (request_irq(cy_isa_irq, cyy_interrupt,
4604 IRQF_DISABLED, "Cyclom-Y", &cy_card[j])) {
4605 printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but "
4606 "could not allocate IRQ#%d.\n",
4607 (unsigned long)cy_isa_address, cy_isa_irq);
4608 iounmap(cy_isa_address);
4613 cy_card[j].base_addr = cy_isa_address;
4614 cy_card[j].ctl_addr.p9050 = NULL;
4615 cy_card[j].irq = (int)cy_isa_irq;
4616 cy_card[j].bus_index = 0;
4617 cy_card[j].first_line = cy_next_channel;
4618 cy_card[j].num_chips = cy_isa_nchan / 4;
4619 if (cy_init_card(&cy_card[j])) {
4620 cy_card[j].base_addr = NULL;
4621 free_irq(cy_isa_irq, &cy_card[j]);
4622 iounmap(cy_isa_address);
4627 printk(KERN_INFO "Cyclom-Y/ISA #%d: 0x%lx-0x%lx, IRQ%d found: "
4628 "%d channels starting from port %d\n",
4629 j + 1, (unsigned long)cy_isa_address,
4630 (unsigned long)(cy_isa_address + (CyISA_Ywin - 1)),
4631 cy_isa_irq, cy_isa_nchan, cy_next_channel);
4633 for (j = cy_next_channel;
4634 j < cy_next_channel + cy_isa_nchan; j++)
4635 tty_register_device(cy_serial_driver, j, NULL);
4636 cy_next_channel += cy_isa_nchan;
4641 #endif /* CONFIG_ISA */
4642 } /* cy_detect_isa */
4645 static inline int __devinit cyc_isfwstr(const char *str, unsigned int size)
4649 for (a = 0; a < size && *str; a++, str++)
4653 for (; a < size; a++, str++)
4660 static inline void __devinit cyz_fpga_copy(void __iomem *fpga, const u8 *data,
4663 for (; size > 0; size--) {
4664 cy_writel(fpga, *data++);
4669 static void __devinit plx_init(struct pci_dev *pdev, int irq,
4670 struct RUNTIME_9060 __iomem *addr)
4673 cy_writel(&addr->init_ctrl, readl(&addr->init_ctrl) | 0x40000000);
4675 cy_writel(&addr->init_ctrl, readl(&addr->init_ctrl) & ~0x40000000);
4677 /* Reload Config. Registers from EEPROM */
4678 cy_writel(&addr->init_ctrl, readl(&addr->init_ctrl) | 0x20000000);
4680 cy_writel(&addr->init_ctrl, readl(&addr->init_ctrl) & ~0x20000000);
4682 /* For some yet unknown reason, once the PLX9060 reloads the EEPROM,
4683 * the IRQ is lost and, thus, we have to re-write it to the PCI config.
4684 * registers. This will remain here until we find a permanent fix.
4686 pci_write_config_byte(pdev, PCI_INTERRUPT_LINE, irq);
4689 static int __devinit __cyz_load_fw(const struct firmware *fw,
4690 const char *name, const u32 mailbox, void __iomem *base,
4693 const void *ptr = fw->data;
4694 const struct zfile_header *h = ptr;
4695 const struct zfile_config *c, *cs;
4696 const struct zfile_block *b, *bs;
4697 unsigned int a, tmp, len = fw->size;
4698 #define BAD_FW KERN_ERR "Bad firmware: "
4699 if (len < sizeof(*h)) {
4700 printk(BAD_FW "too short: %u<%zu\n", len, sizeof(*h));
4704 cs = ptr + h->config_offset;
4705 bs = ptr + h->block_offset;
4707 if ((void *)(cs + h->n_config) > ptr + len ||
4708 (void *)(bs + h->n_blocks) > ptr + len) {
4709 printk(BAD_FW "too short");
4713 if (cyc_isfwstr(h->name, sizeof(h->name)) ||
4714 cyc_isfwstr(h->date, sizeof(h->date))) {
4715 printk(BAD_FW "bad formatted header string\n");
4719 if (strncmp(name, h->name, sizeof(h->name))) {
4720 printk(BAD_FW "bad name '%s' (expected '%s')\n", h->name, name);
4725 for (c = cs; c < cs + h->n_config; c++) {
4726 for (a = 0; a < c->n_blocks; a++)
4727 if (c->block_list[a] > h->n_blocks) {
4728 printk(BAD_FW "bad block ref number in cfgs\n");
4731 if (c->mailbox == mailbox && c->function == 0) /* 0 is normal */
4735 printk(BAD_FW "nothing appropriate\n");
4739 for (b = bs; b < bs + h->n_blocks; b++)
4740 if (b->file_offset + b->size > len) {
4741 printk(BAD_FW "bad block data offset\n");
4745 /* everything is OK, let's seek'n'load it */
4746 for (c = cs; c < cs + h->n_config; c++)
4747 if (c->mailbox == mailbox && c->function == 0)
4750 for (a = 0; a < c->n_blocks; a++) {
4751 b = &bs[c->block_list[a]];
4752 if (b->type == ZBLOCK_FPGA) {
4754 cyz_fpga_copy(fpga, ptr + b->file_offset,
4758 memcpy_toio(base + b->ram_offset,
4759 ptr + b->file_offset, b->size);
4766 static int __devinit cyz_load_fw(struct pci_dev *pdev, void __iomem *base_addr,
4767 struct RUNTIME_9060 __iomem *ctl_addr, int irq)
4769 const struct firmware *fw;
4770 struct FIRM_ID __iomem *fid = base_addr + ID_ADDRESS;
4771 struct CUSTOM_REG __iomem *cust = base_addr;
4772 struct ZFW_CTRL __iomem *pt_zfwctrl;
4774 u32 mailbox, status;
4778 retval = request_firmware(&fw, "cyzfirm.bin", &pdev->dev);
4780 dev_err(&pdev->dev, "can't get firmware\n");
4784 /* Check whether the firmware is already loaded and running. If
4785 positive, skip this board */
4786 if (__cyz_fpga_loaded(ctl_addr) && readl(&fid->signature) == ZFIRM_ID) {
4787 u32 cntval = readl(base_addr + 0x190);
4790 if (cntval != readl(base_addr + 0x190)) {
4791 /* FW counter is working, FW is running */
4792 dev_dbg(&pdev->dev, "Cyclades-Z FW already loaded. "
4793 "Skipping board.\n");
4800 cy_writel(&ctl_addr->intr_ctrl_stat, readl(&ctl_addr->intr_ctrl_stat) &
4803 mailbox = readl(&ctl_addr->mail_box_0);
4805 if (mailbox == 0 || __cyz_fpga_loaded(ctl_addr)) {
4806 /* stops CPU and set window to beginning of RAM */
4807 cy_writel(&ctl_addr->loc_addr_base, WIN_CREG);
4808 cy_writel(&cust->cpu_stop, 0);
4809 cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
4813 plx_init(pdev, irq, ctl_addr);
4817 retval = __cyz_load_fw(fw, "Cyclom-Z", mailbox, NULL,
4821 if (!__cyz_fpga_loaded(ctl_addr)) {
4822 dev_err(&pdev->dev, "fw upload successful, but fw is "
4828 /* stops CPU and set window to beginning of RAM */
4829 cy_writel(&ctl_addr->loc_addr_base, WIN_CREG);
4830 cy_writel(&cust->cpu_stop, 0);
4831 cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
4835 for (tmp = base_addr; tmp < base_addr + RAM_SIZE; tmp++)
4836 cy_writeb(tmp, 255);
4838 /* set window to last 512K of RAM */
4839 cy_writel(&ctl_addr->loc_addr_base, WIN_RAM + RAM_SIZE);
4840 for (tmp = base_addr; tmp < base_addr + RAM_SIZE; tmp++)
4841 cy_writeb(tmp, 255);
4842 /* set window to beginning of RAM */
4843 cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
4846 retval = __cyz_load_fw(fw, "Cyclom-Z", mailbox, base_addr, NULL);
4847 release_firmware(fw);
4851 /* finish boot and start boards */
4852 cy_writel(&ctl_addr->loc_addr_base, WIN_CREG);
4853 cy_writel(&cust->cpu_start, 0);
4854 cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
4856 while ((status = readl(&fid->signature)) != ZFIRM_ID && i++ < 40)
4858 if (status != ZFIRM_ID) {
4859 if (status == ZFIRM_HLT) {
4860 dev_err(&pdev->dev, "you need an external power supply "
4861 "for this number of ports. Firmware halted and "
4866 dev_warn(&pdev->dev, "fid->signature = 0x%x... Waiting "
4867 "some more time\n", status);
4868 while ((status = readl(&fid->signature)) != ZFIRM_ID &&
4871 if (status != ZFIRM_ID) {
4872 dev_err(&pdev->dev, "Board not started in 20 seconds! "
4873 "Giving up. (fid->signature = 0x%x)\n",
4875 dev_info(&pdev->dev, "*** Warning ***: if you are "
4876 "upgrading the FW, please power cycle the "
4877 "system before loading the new FW to the "
4880 if (__cyz_fpga_loaded(ctl_addr))
4881 plx_init(pdev, irq, ctl_addr);
4886 dev_dbg(&pdev->dev, "Firmware started after %d seconds.\n",
4889 pt_zfwctrl = base_addr + readl(&fid->zfwctrl_addr);
4891 dev_dbg(&pdev->dev, "fid=> %p, zfwctrl_addr=> %x, npt_zfwctrl=> %p\n",
4892 base_addr + ID_ADDRESS, readl(&fid->zfwctrl_addr),
4893 base_addr + readl(&fid->zfwctrl_addr));
4895 dev_info(&pdev->dev, "Cyclades-Z FW loaded: version = %x, ports = %u\n",
4896 readl(&pt_zfwctrl->board_ctrl.fw_version),
4897 readl(&pt_zfwctrl->board_ctrl.n_channel));
4899 if (readl(&pt_zfwctrl->board_ctrl.n_channel) == 0) {
4900 dev_warn(&pdev->dev, "no Cyclades-Z ports were found. Please "
4901 "check the connection between the Z host card and the "
4902 "serial expanders.\n");
4904 if (__cyz_fpga_loaded(ctl_addr))
4905 plx_init(pdev, irq, ctl_addr);
4907 dev_info(&pdev->dev, "Null number of ports detected. Board "
4913 cy_writel(&pt_zfwctrl->board_ctrl.op_system, C_OS_LINUX);
4914 cy_writel(&pt_zfwctrl->board_ctrl.dr_version, DRIVER_VERSION);
4917 Early firmware failed to start looking for commands.
4918 This enables firmware interrupts for those commands.
4920 cy_writel(&ctl_addr->intr_ctrl_stat, readl(&ctl_addr->intr_ctrl_stat) |
4922 cy_writel(&ctl_addr->intr_ctrl_stat, readl(&ctl_addr->intr_ctrl_stat) |
4927 release_firmware(fw);
4932 static int __devinit cy_pci_probe(struct pci_dev *pdev,
4933 const struct pci_device_id *ent)
4935 void __iomem *addr0 = NULL, *addr2 = NULL;
4936 char *card_name = NULL;
4937 u32 uninitialized_var(mailbox);
4938 unsigned int device_id, nchan = 0, card_no, i;
4939 unsigned char plx_ver;
4942 retval = pci_enable_device(pdev);
4944 dev_err(&pdev->dev, "cannot enable device\n");
4948 /* read PCI configuration area */
4950 device_id = pdev->device & ~PCI_DEVICE_ID_MASK;
4952 #if defined(__alpha__)
4953 if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo) { /* below 1M? */
4954 dev_err(&pdev->dev, "Cyclom-Y/PCI not supported for low "
4955 "addresses on Alpha systems.\n");
4960 if (device_id == PCI_DEVICE_ID_CYCLOM_Z_Lo) {
4961 dev_err(&pdev->dev, "Cyclades-Z/PCI not supported for low "
4967 if (pci_resource_flags(pdev, 2) & IORESOURCE_IO) {
4968 dev_warn(&pdev->dev, "PCI I/O bit incorrectly set. Ignoring "
4970 pdev->resource[2].flags &= ~IORESOURCE_IO;
4973 retval = pci_request_regions(pdev, "cyclades");
4975 dev_err(&pdev->dev, "failed to reserve resources\n");
4980 if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo ||
4981 device_id == PCI_DEVICE_ID_CYCLOM_Y_Hi) {
4982 card_name = "Cyclom-Y";
4984 addr0 = ioremap_nocache(pci_resource_start(pdev, 0),
4986 if (addr0 == NULL) {
4987 dev_err(&pdev->dev, "can't remap ctl region\n");
4990 addr2 = ioremap_nocache(pci_resource_start(pdev, 2),
4992 if (addr2 == NULL) {
4993 dev_err(&pdev->dev, "can't remap base region\n");
4997 nchan = CyPORTS_PER_CHIP * cyy_init_card(addr2, 1);
4999 dev_err(&pdev->dev, "Cyclom-Y PCI host card with no "
5000 "Serial-Modules\n");
5003 } else if (device_id == PCI_DEVICE_ID_CYCLOM_Z_Hi) {
5004 struct RUNTIME_9060 __iomem *ctl_addr;
5006 ctl_addr = addr0 = ioremap_nocache(pci_resource_start(pdev, 0),
5008 if (addr0 == NULL) {
5009 dev_err(&pdev->dev, "can't remap ctl region\n");
5013 /* Disable interrupts on the PLX before resetting it */
5014 cy_writew(&ctl_addr->intr_ctrl_stat,
5015 readw(&ctl_addr->intr_ctrl_stat) & ~0x0900);
5017 plx_init(pdev, irq, addr0);
5019 mailbox = readl(&ctl_addr->mail_box_0);
5021 addr2 = ioremap_nocache(pci_resource_start(pdev, 2),
5022 mailbox == ZE_V1 ? CyPCI_Ze_win : CyPCI_Zwin);
5023 if (addr2 == NULL) {
5024 dev_err(&pdev->dev, "can't remap base region\n");
5028 if (mailbox == ZE_V1) {
5029 card_name = "Cyclades-Ze";
5031 nchan = ZE_V1_NPORTS;
5033 card_name = "Cyclades-8Zo";
5037 if (mailbox == ZO_V1) {
5038 cy_writel(&ctl_addr->loc_addr_base, WIN_CREG);
5039 dev_info(&pdev->dev, "Cyclades-8Zo/PCI: FPGA "
5040 "id %lx, ver %lx\n", (ulong)(0xff &
5041 readl(&((struct CUSTOM_REG *)addr2)->
5042 fpga_id)), (ulong)(0xff &
5043 readl(&((struct CUSTOM_REG *)addr2)->
5045 cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
5047 dev_info(&pdev->dev, "Cyclades-Z/PCI: New "
5048 "Cyclades-Z board. FPGA not loaded\n");
5051 /* The following clears the firmware id word. This
5052 ensures that the driver will not attempt to talk to
5053 the board until it has been properly initialized.
5055 if ((mailbox == ZO_V1) || (mailbox == ZO_V2))
5056 cy_writel(addr2 + ID_ADDRESS, 0L);
5059 retval = cyz_load_fw(pdev, addr2, addr0, irq);
5064 if ((cy_next_channel + nchan) > NR_PORTS) {
5065 dev_err(&pdev->dev, "Cyclades-8Zo/PCI found, but no "
5066 "channels are available. Change NR_PORTS in "
5067 "cyclades.c and recompile kernel.\n");
5070 /* fill the next cy_card structure available */
5071 for (card_no = 0; card_no < NR_CARDS; card_no++) {
5072 if (cy_card[card_no].base_addr == NULL)
5075 if (card_no == NR_CARDS) { /* no more cy_cards available */
5076 dev_err(&pdev->dev, "Cyclades-8Zo/PCI found, but no "
5077 "more cards can be used. Change NR_CARDS in "
5078 "cyclades.c and recompile kernel.\n");
5082 if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo ||
5083 device_id == PCI_DEVICE_ID_CYCLOM_Y_Hi) {
5085 retval = request_irq(irq, cyy_interrupt,
5086 IRQF_SHARED, "Cyclom-Y", &cy_card[card_no]);
5088 dev_err(&pdev->dev, "could not allocate IRQ\n");
5091 cy_card[card_no].num_chips = nchan / 4;
5093 cy_card[card_no].hw_ver = mailbox;
5094 cy_card[card_no].num_chips = (unsigned int)-1;
5095 #ifdef CONFIG_CYZ_INTR
5096 /* allocate IRQ only if board has an IRQ */
5097 if (irq != 0 && irq != 255) {
5098 retval = request_irq(irq, cyz_interrupt,
5099 IRQF_SHARED, "Cyclades-Z",
5102 dev_err(&pdev->dev, "could not allocate IRQ\n");
5106 #endif /* CONFIG_CYZ_INTR */
5110 cy_card[card_no].base_addr = addr2;
5111 cy_card[card_no].ctl_addr.p9050 = addr0;
5112 cy_card[card_no].irq = irq;
5113 cy_card[card_no].bus_index = 1;
5114 cy_card[card_no].first_line = cy_next_channel;
5115 retval = cy_init_card(&cy_card[card_no]);
5119 pci_set_drvdata(pdev, &cy_card[card_no]);
5121 if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo ||
5122 device_id == PCI_DEVICE_ID_CYCLOM_Y_Hi) {
5123 /* enable interrupts in the PCI interface */
5124 plx_ver = readb(addr2 + CyPLX_VER) & 0x0f;
5127 cy_writeb(addr0 + 0x4c, 0x43);
5132 default: /* Old boards, use PLX_9060 */
5134 struct RUNTIME_9060 __iomem *ctl_addr = addr0;
5135 plx_init(pdev, irq, ctl_addr);
5136 cy_writew(&ctl_addr->intr_ctrl_stat,
5137 readw(&ctl_addr->intr_ctrl_stat) | 0x0900);
5143 dev_info(&pdev->dev, "%s/PCI #%d found: %d channels starting from "
5144 "port %d.\n", card_name, card_no + 1, nchan, cy_next_channel);
5145 for (i = cy_next_channel; i < cy_next_channel + nchan; i++)
5146 tty_register_device(cy_serial_driver, i, &pdev->dev);
5147 cy_next_channel += nchan;
5151 cy_card[card_no].base_addr = NULL;
5152 free_irq(irq, &cy_card[card_no]);
5158 pci_release_regions(pdev);
5160 pci_disable_device(pdev);
5165 static void __devexit cy_pci_remove(struct pci_dev *pdev)
5167 struct cyclades_card *cinfo = pci_get_drvdata(pdev);
5170 /* non-Z with old PLX */
5171 if (!cy_is_Z(cinfo) && (readb(cinfo->base_addr + CyPLX_VER) & 0x0f) ==
5173 cy_writeb(cinfo->ctl_addr.p9050 + 0x4c, 0);
5175 #ifndef CONFIG_CYZ_INTR
5176 if (!cy_is_Z(cinfo))
5178 cy_writew(&cinfo->ctl_addr.p9060->intr_ctrl_stat,
5179 readw(&cinfo->ctl_addr.p9060->intr_ctrl_stat) &
5182 iounmap(cinfo->base_addr);
5183 if (cinfo->ctl_addr.p9050)
5184 iounmap(cinfo->ctl_addr.p9050);
5186 #ifndef CONFIG_CYZ_INTR
5188 #endif /* CONFIG_CYZ_INTR */
5190 free_irq(cinfo->irq, cinfo);
5191 pci_release_regions(pdev);
5193 cinfo->base_addr = NULL;
5194 for (i = cinfo->first_line; i < cinfo->first_line +
5196 tty_unregister_device(cy_serial_driver, i);
5198 kfree(cinfo->ports);
5201 static struct pci_driver cy_pci_driver = {
5203 .id_table = cy_pci_dev_id,
5204 .probe = cy_pci_probe,
5205 .remove = __devexit_p(cy_pci_remove)
5209 static int cyclades_proc_show(struct seq_file *m, void *v)
5211 struct cyclades_port *info;
5213 __u32 cur_jifs = jiffies;
5215 seq_puts(m, "Dev TimeOpen BytesOut IdleOut BytesIn "
5216 "IdleIn Overruns Ldisc\n");
5218 /* Output one line for each known port */
5219 for (i = 0; i < NR_CARDS; i++)
5220 for (j = 0; j < cy_card[i].nports; j++) {
5221 info = &cy_card[i].ports[j];
5223 if (info->port.count)
5224 seq_printf(m, "%3d %8lu %10lu %8lu "
5225 "%10lu %8lu %9lu %6ld\n", info->line,
5226 (cur_jifs - info->idle_stats.in_use) /
5227 HZ, info->idle_stats.xmit_bytes,
5228 (cur_jifs - info->idle_stats.xmit_idle)/
5229 HZ, info->idle_stats.recv_bytes,
5230 (cur_jifs - info->idle_stats.recv_idle)/
5231 HZ, info->idle_stats.overruns,
5232 /* FIXME: double check locking */
5233 (long)info->port.tty->ldisc.ops->num);
5235 seq_printf(m, "%3d %8lu %10lu %8lu "
5236 "%10lu %8lu %9lu %6ld\n",
5237 info->line, 0L, 0L, 0L, 0L, 0L, 0L, 0L);
5242 static int cyclades_proc_open(struct inode *inode, struct file *file)
5244 return single_open(file, cyclades_proc_show, NULL);
5247 static const struct file_operations cyclades_proc_fops = {
5248 .owner = THIS_MODULE,
5249 .open = cyclades_proc_open,
5251 .llseek = seq_lseek,
5252 .release = single_release,
5255 /* The serial driver boot-time initialization code!
5256 Hardware I/O ports are mapped to character special devices on a
5257 first found, first allocated manner. That is, this code searches
5258 for Cyclom cards in the system. As each is found, it is probed
5259 to discover how many chips (and thus how many ports) are present.
5260 These ports are mapped to the tty ports 32 and upward in monotonic
5261 fashion. If an 8-port card is replaced with a 16-port card, the
5262 port mapping on a following card will shift.
5264 This approach is different from what is used in the other serial
5265 device driver because the Cyclom is more properly a multiplexer,
5266 not just an aggregation of serial ports on one card.
5268 If there are more cards with more ports than have been
5269 statically allocated above, a warning is printed and the
5270 extra ports are ignored.
5273 static const struct tty_operations cy_ops = {
5277 .put_char = cy_put_char,
5278 .flush_chars = cy_flush_chars,
5279 .write_room = cy_write_room,
5280 .chars_in_buffer = cy_chars_in_buffer,
5281 .flush_buffer = cy_flush_buffer,
5283 .throttle = cy_throttle,
5284 .unthrottle = cy_unthrottle,
5285 .set_termios = cy_set_termios,
5288 .hangup = cy_hangup,
5289 .break_ctl = cy_break,
5290 .wait_until_sent = cy_wait_until_sent,
5291 .tiocmget = cy_tiocmget,
5292 .tiocmset = cy_tiocmset,
5293 .proc_fops = &cyclades_proc_fops,
5296 static int __init cy_init(void)
5298 unsigned int nboards;
5299 int retval = -ENOMEM;
5301 cy_serial_driver = alloc_tty_driver(NR_PORTS);
5302 if (!cy_serial_driver)
5305 printk(KERN_INFO "Cyclades driver " CY_VERSION " (built %s %s)\n",
5306 __DATE__, __TIME__);
5308 /* Initialize the tty_driver structure */
5310 cy_serial_driver->owner = THIS_MODULE;
5311 cy_serial_driver->driver_name = "cyclades";
5312 cy_serial_driver->name = "ttyC";
5313 cy_serial_driver->major = CYCLADES_MAJOR;
5314 cy_serial_driver->minor_start = 0;
5315 cy_serial_driver->type = TTY_DRIVER_TYPE_SERIAL;
5316 cy_serial_driver->subtype = SERIAL_TYPE_NORMAL;
5317 cy_serial_driver->init_termios = tty_std_termios;
5318 cy_serial_driver->init_termios.c_cflag =
5319 B9600 | CS8 | CREAD | HUPCL | CLOCAL;
5320 cy_serial_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
5321 tty_set_operations(cy_serial_driver, &cy_ops);
5323 retval = tty_register_driver(cy_serial_driver);
5325 printk(KERN_ERR "Couldn't register Cyclades serial driver\n");
5329 /* the code below is responsible to find the boards. Each different
5330 type of board has its own detection routine. If a board is found,
5331 the next cy_card structure available is set by the detection
5332 routine. These functions are responsible for checking the
5333 availability of cy_card and cy_port data structures and updating
5334 the cy_next_channel. */
5336 /* look for isa boards */
5337 nboards = cy_detect_isa();
5340 /* look for pci boards */
5341 retval = pci_register_driver(&cy_pci_driver);
5342 if (retval && !nboards) {
5343 tty_unregister_driver(cy_serial_driver);
5350 put_tty_driver(cy_serial_driver);
5355 static void __exit cy_cleanup_module(void)
5357 struct cyclades_card *card;
5360 #ifndef CONFIG_CYZ_INTR
5361 del_timer_sync(&cyz_timerlist);
5362 #endif /* CONFIG_CYZ_INTR */
5364 e1 = tty_unregister_driver(cy_serial_driver);
5366 printk(KERN_ERR "failed to unregister Cyclades serial "
5367 "driver(%d)\n", e1);
5370 pci_unregister_driver(&cy_pci_driver);
5373 for (i = 0; i < NR_CARDS; i++) {
5375 if (card->base_addr) {
5376 /* clear interrupt */
5377 cy_writeb(card->base_addr + Cy_ClrIntr, 0);
5378 iounmap(card->base_addr);
5379 if (card->ctl_addr.p9050)
5380 iounmap(card->ctl_addr.p9050);
5382 #ifndef CONFIG_CYZ_INTR
5384 #endif /* CONFIG_CYZ_INTR */
5386 free_irq(card->irq, card);
5387 for (e1 = card->first_line; e1 < card->first_line +
5389 tty_unregister_device(cy_serial_driver, e1);
5394 put_tty_driver(cy_serial_driver);
5395 } /* cy_cleanup_module */
5397 module_init(cy_init);
5398 module_exit(cy_cleanup_module);
5400 MODULE_LICENSE("GPL");
5401 MODULE_VERSION(CY_VERSION);
5402 MODULE_ALIAS_CHARDEV_MAJOR(CYCLADES_MAJOR);