2 /* sx.c -- driver for the Specialix SX series cards.
4 * This driver will also support the older SI, and XIO cards.
7 * (C) 1998 - 2004 R.E.Wolff@BitWizard.nl
9 * Simon Allen (simonallen@cix.compulink.co.uk) wrote a previous
10 * version of this driver. Some fragments may have been copied. (none
13 * Specialix pays for the development and support of this driver.
14 * Please DO contact support@specialix.co.uk if you require
15 * support. But please read the documentation (sx.txt) first.
19 * This program is free software; you can redistribute it and/or
20 * modify it under the terms of the GNU General Public License as
21 * published by the Free Software Foundation; either version 2 of
22 * the License, or (at your option) any later version.
24 * This program is distributed in the hope that it will be
25 * useful, but WITHOUT ANY WARRANTY; without even the implied
26 * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
27 * PURPOSE. See the GNU General Public License for more details.
29 * You should have received a copy of the GNU General Public
30 * License along with this program; if not, write to the Free
31 * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139,
36 * Revision 1.33 2000/03/09 10:00:00 pvdl,wolff
37 * - Fixed module and port counting
38 * - Fixed signal handling
41 * Revision 1.32 2000/03/07 09:00:00 wolff,pvdl
42 * - Fixed some sx_dprintk typos
43 * - added detection for an invalid board/module configuration
45 * Revision 1.31 2000/03/06 12:00:00 wolff,pvdl
46 * - Added support for EISA
48 * Revision 1.30 2000/01/21 17:43:06 wolff
49 * - Added support for SX+
51 * Revision 1.26 1999/08/05 15:22:14 wolff
53 * - Reformatted to Linus' liking.
55 * Revision 1.25 1999/07/30 14:24:08 wolff
56 * Had accidentally left "gs_debug" set to "-1" instead of "off" (=0).
58 * Revision 1.24 1999/07/28 09:41:52 wolff
59 * - I noticed the remark about use-count straying in sx.txt. I checked
60 * sx_open, and found a few places where that could happen. I hope it's
63 * Revision 1.23 1999/07/28 08:56:06 wolff
64 * - Fixed crash when sx_firmware run twice.
65 * - Added sx_slowpoll as a module parameter (I guess nobody really wanted
66 * to change it from the default... )
67 * - Fixed a stupid editing problem I introduced in 1.22.
68 * - Fixed dropping characters on a termios change.
70 * Revision 1.22 1999/07/26 21:01:43 wolff
71 * Russell Brown noticed that I had overlooked 4 out of six modem control
72 * signals in sx_getsignals. Ooops.
74 * Revision 1.21 1999/07/23 09:11:33 wolff
75 * I forgot to free dynamically allocated memory when the driver is unloaded.
77 * Revision 1.20 1999/07/20 06:25:26 wolff
78 * The "closing wait" wasn't honoured. Thanks to James Griffiths for
81 * Revision 1.19 1999/07/11 08:59:59 wolff
82 * Fixed an oops in close, when an open was pending. Changed the memtest
83 * a bit. Should also test the board in word-mode, however my card fails the
84 * memtest then. I still have to figure out what is wrong...
86 * Revision 1.18 1999/06/10 09:38:42 wolff
87 * Changed the format of the firmware revision from %04x to %x.%02x .
89 * Revision 1.17 1999/06/04 09:44:35 wolff
90 * fixed problem: reference to pci stuff when config_pci was off...
91 * Thanks to Jorge Novo for noticing this.
93 * Revision 1.16 1999/06/02 08:30:15 wolff
94 * added/removed the workaround for the DCD bug in the Firmware.
95 * A bit more debugging code to locate that...
97 * Revision 1.15 1999/06/01 11:35:30 wolff
98 * when DCD is left low (floating?), on TA's the firmware first tells us
99 * that DCD is high, but after a short while suddenly comes to the
100 * conclusion that it is low. All this would be fine, if it weren't that
101 * Unix requires us to send a "hangup" signal in that case. This usually
102 * all happens BEFORE the program has had a chance to ioctl the device
105 * Revision 1.14 1999/05/25 11:18:59 wolff
107 * Added checks for return code of sx_sendcommand.
108 * Don't issue "reconfig" if port isn't open yet. (bit us on TA modules...)
110 * Revision 1.13 1999/04/29 15:18:01 wolff
111 * Fixed an "oops" that showed on SuSE 6.0 systems.
112 * Activate DTR again after stty 0.
114 * Revision 1.12 1999/04/29 07:49:52 wolff
115 * Improved "stty 0" handling a bit. (used to change baud to 9600 assuming
116 * the connection would be dropped anyway. That is not always the case,
117 * and confuses people).
118 * Told the card to always monitor the modem signals.
119 * Added support for dynamic gs_debug adjustments.
120 * Now tells the rest of the system the number of ports.
122 * Revision 1.11 1999/04/24 11:11:30 wolff
123 * Fixed two stupid typos in the memory test.
125 * Revision 1.10 1999/04/24 10:53:39 wolff
126 * Added some of Christian's suggestions.
127 * Fixed an HW_COOK_IN bug (ISIG was not in I_OTHER. We used to trust the
128 * card to send the signal to the process.....)
130 * Revision 1.9 1999/04/23 07:26:38 wolff
131 * Included Christian Lademann's 2.0 compile-warning fixes and interrupt
132 * assignment redesign.
133 * Cleanup of some other stuff.
135 * Revision 1.8 1999/04/16 13:05:30 wolff
136 * fixed a DCD change unnoticed bug.
138 * Revision 1.7 1999/04/14 22:19:51 wolff
139 * Fixed typo that showed up in 2.0.x builds (get_user instead of Get_user!)
141 * Revision 1.6 1999/04/13 18:40:20 wolff
142 * changed misc-minor to 161, as assigned by HPA.
144 * Revision 1.5 1999/04/13 15:12:25 wolff
145 * Fixed use-count leak when "hangup" occurred.
146 * Added workaround for a stupid-PCIBIOS bug.
149 * Revision 1.4 1999/04/01 22:47:40 wolff
150 * Fixed < 1M linux-2.0 problem.
151 * (vremap isn't compatible with ioremap in that case)
153 * Revision 1.3 1999/03/31 13:45:45 wolff
154 * Firmware loading is now done through a separate IOCTL.
156 * Revision 1.2 1999/03/28 12:22:29 wolff
159 * Revision 1.1 1999/03/28 12:10:34 wolff
160 * Readying for release on 2.0.x (sorry David, 1.01 becomes 1.1 for RCS).
162 * Revision 0.12 1999/03/28 09:20:10 wolff
163 * Fixed problem in 0.11, continueing cleanup.
165 * Revision 0.11 1999/03/28 08:46:44 wolff
168 * Revision 0.10 1999/03/28 08:09:43 wolff
169 * Fixed loosing characters on close.
171 * Revision 0.9 1999/03/21 22:52:01 wolff
172 * Ported back to 2.2.... (minor things)
174 * Revision 0.8 1999/03/21 22:40:33 wolff
177 * Revision 0.7 1999/03/21 19:06:34 wolff
178 * Fixed hangup processing.
180 * Revision 0.6 1999/02/05 08:45:14 wolff
181 * fixed real_raw problems. Inclusion into kernel imminent.
183 * Revision 0.5 1998/12/21 23:51:06 wolff
184 * Snatched a nasty bug: sx_transmit_chars was getting re-entered, and it
185 * shouldn't have. THATs why I want to have transmit interrupts even when
186 * the buffer is empty.
188 * Revision 0.4 1998/12/17 09:34:46 wolff
189 * PPP works. ioctl works. Basically works!
191 * Revision 0.3 1998/12/15 13:05:18 wolff
192 * It works! Wow! Gotta start implementing IOCTL and stuff....
194 * Revision 0.2 1998/12/01 08:33:53 wolff
195 * moved over to 2.1.130
197 * Revision 0.1 1998/11/03 21:23:51 wolff
198 * Initial revision. Detects SX card.
203 #define RCS_ID "$Id: sx.c,v 1.33 2000/03/08 10:01:02 wolff, pvdl Exp $"
204 #define RCS_REV "$Revision: 1.33 $"
206 #include <linux/module.h>
207 #include <linux/kdev_t.h>
208 #include <linux/kernel.h>
209 #include <linux/sched.h>
210 #include <linux/ioport.h>
211 #include <linux/interrupt.h>
212 #include <linux/errno.h>
213 #include <linux/tty.h>
214 #include <linux/tty_flip.h>
215 #include <linux/mm.h>
216 #include <linux/serial.h>
217 #include <linux/fcntl.h>
218 #include <linux/major.h>
219 #include <linux/delay.h>
220 #include <linux/pci.h>
221 #include <linux/slab.h>
222 #include <linux/init.h>
223 #include <linux/miscdevice.h>
224 #include <linux/bitops.h>
227 #include <asm/uaccess.h>
229 /* The 3.0.0 version of sxboards/sxwindow.h uses BYTE and WORD.... */
233 /* .... but the 3.0.4 version uses _u8 and _u16. */
237 #include "sxboards.h"
238 #include "sxwindow.h"
240 #include <linux/generic_serial.h>
244 /* I don't think that this driver can handle more than 256 ports on
245 one machine. You'll have to increase the number of boards in sx.h
246 if you want more than 4 boards. */
248 #ifndef PCI_DEVICE_ID_SPECIALIX_SX_XIO_IO8
249 #define PCI_DEVICE_ID_SPECIALIX_SX_XIO_IO8 0x2000
253 static struct pci_device_id sx_pci_tbl
[] = {
254 { PCI_VENDOR_ID_SPECIALIX
, PCI_DEVICE_ID_SPECIALIX_SX_XIO_IO8
, PCI_ANY_ID
, PCI_ANY_ID
},
257 MODULE_DEVICE_TABLE(pci
, sx_pci_tbl
);
258 #endif /* CONFIG_PCI */
260 /* Configurable options:
261 (Don't be too sure that it'll work if you toggle them) */
263 /* Am I paranoid or not ? ;-) */
264 #undef SX_PARANOIA_CHECK
267 /* 20 -> 2000 per second. The card should rate-limit interrupts at 100
268 Hz, but it is user configurable. I don't recommend going above 1000
269 Hz. The interrupt ratelimit might trigger if the interrupt is
270 shared with a very active other device. */
271 #define IRQ_RATE_LIMIT 20
273 /* Sharing interrupts is possible now. If the other device wants more
274 than 2000 interrupts per second, we'd gracefully decline further
275 interrupts. That's not what we want. On the other hand, if the
276 other device interrupts 2000 times a second, don't use the SX
277 interrupt. Use polling. */
278 #undef IRQ_RATE_LIMIT
282 /* Not implemented */
284 * The following defines are mostly for testing purposes. But if you need
285 * some nice reporting in your syslog, you can define them also.
287 #define SX_REPORT_FIFO
288 #define SX_REPORT_OVERRUN
292 /* Function prototypes */
293 static void sx_disable_tx_interrupts (void * ptr
);
294 static void sx_enable_tx_interrupts (void * ptr
);
295 static void sx_disable_rx_interrupts (void * ptr
);
296 static void sx_enable_rx_interrupts (void * ptr
);
297 static int sx_get_CD (void * ptr
);
298 static void sx_shutdown_port (void * ptr
);
299 static int sx_set_real_termios (void *ptr
);
300 static void sx_close (void *ptr
);
301 static int sx_chars_in_buffer (void * ptr
);
302 static int sx_init_board (struct sx_board
*board
);
303 static int sx_init_portstructs (int nboards
, int nports
);
304 static int sx_fw_ioctl (struct inode
*inode
, struct file
*filp
,
305 unsigned int cmd
, unsigned long arg
);
306 static int sx_init_drivers(void);
309 static struct tty_driver
*sx_driver
;
311 static struct sx_board boards
[SX_NBOARDS
];
312 static struct sx_port
*sx_ports
;
313 static int sx_initialized
;
314 static int sx_nports
;
318 /* You can have the driver poll your card.
319 - Set sx_poll to 1 to poll every timer tick (10ms on Intel).
320 This is used when the card cannot use an interrupt for some reason.
322 - set sx_slowpoll to 100 to do an extra poll once a second (on Intel). If
323 the driver misses an interrupt (report this if it DOES happen to you!)
324 everything will continue to work....
326 static int sx_poll
= 1;
327 static int sx_slowpoll
;
329 /* The card limits the number of interrupts per second.
330 At 115k2 "100" should be sufficient.
331 If you're using higher baudrates, you can increase this...
334 static int sx_maxints
= 100;
336 /* These are the only open spaces in my computer. Yours may have more
338 duh: Card at 0xa0000 is possible on HP Netserver?? -- pvdl
340 static int sx_probe_addrs
[]= {0xc0000, 0xd0000, 0xe0000,
341 0xc8000, 0xd8000, 0xe8000};
342 static int si_probe_addrs
[]= {0xc0000, 0xd0000, 0xe0000,
343 0xc8000, 0xd8000, 0xe8000, 0xa0000};
344 static int si1_probe_addrs
[]= { 0xd0000};
346 #define NR_SX_ADDRS ARRAY_SIZE(sx_probe_addrs)
347 #define NR_SI_ADDRS ARRAY_SIZE(si_probe_addrs)
348 #define NR_SI1_ADDRS ARRAY_SIZE(si1_probe_addrs)
351 /* Set the mask to all-ones. This alas, only supports 32 interrupts.
352 Some architectures may need more. */
353 static int sx_irqmask
= -1;
355 module_param_array(sx_probe_addrs
, int, NULL
, 0);
356 module_param_array(si_probe_addrs
, int, NULL
, 0);
357 module_param(sx_poll
, int, 0);
358 module_param(sx_slowpoll
, int, 0);
359 module_param(sx_maxints
, int, 0);
360 module_param(sx_debug
, int, 0);
361 module_param(sx_irqmask
, int, 0);
363 MODULE_LICENSE("GPL");
365 static struct real_driver sx_real_driver
= {
366 sx_disable_tx_interrupts
,
367 sx_enable_tx_interrupts
,
368 sx_disable_rx_interrupts
,
369 sx_enable_rx_interrupts
,
379 This driver can spew a whole lot of debugging output at you. If you
380 need maximum performance, you should disable the DEBUG define. To
381 aid in debugging in the field, I'm leaving the compile-time debug
382 features enabled, and disable them "runtime". That allows me to
383 instruct people with problems to enable debugging without requiring
390 #define sx_dprintk(f, str...) if (sx_debug & f) printk (str)
392 #define sx_dprintk(f, str...) /* nothing */
397 #define func_enter() sx_dprintk (SX_DEBUG_FLOW, "sx: enter %s\n",__FUNCTION__)
398 #define func_exit() sx_dprintk (SX_DEBUG_FLOW, "sx: exit %s\n", __FUNCTION__)
400 #define func_enter2() sx_dprintk (SX_DEBUG_FLOW, "sx: enter %s (port %d)\n", \
401 __FUNCTION__, port->line)
407 * Firmware loader driver specific routines
411 static const struct file_operations sx_fw_fops
= {
412 .owner
= THIS_MODULE
,
413 .ioctl
= sx_fw_ioctl
,
416 static struct miscdevice sx_fw_device
= {
417 SXCTL_MISC_MINOR
, "sxctl", &sx_fw_fops
424 #ifdef SX_PARANOIA_CHECK
426 /* This doesn't work. Who's paranoid around here? Not me! */
428 static inline int sx_paranoia_check(struct sx_port
const * port
,
429 char *name
, const char *routine
)
432 static const char *badmagic
=
433 KERN_ERR
"sx: Warning: bad sx port magic number for device %s in %s\n";
434 static const char *badinfo
=
435 KERN_ERR
"sx: Warning: null sx port for device %s in %s\n";
438 printk(badinfo
, name
, routine
);
441 if (port
->magic
!= SX_MAGIC
) {
442 printk(badmagic
, name
, routine
);
449 #define sx_paranoia_check(a,b,c) 0
452 /* The timeouts. First try 30 times as fast as possible. Then give
453 the card some time to breathe between accesses. (Otherwise the
454 processor on the card might not be able to access its OWN bus... */
457 #define TIMEOUT_2 1000000
461 static void my_hd_io(void __iomem
*p
, int len
)
464 unsigned char __iomem
*addr
= p
;
466 for (i
=0;i
<len
;i
+=16) {
467 printk ("%p ", addr
+i
);
469 printk ("%02x %s", readb(addr
+j
+i
), (j
==7)?" ":"");
472 ch
= readb(addr
+j
+i
);
473 printk ("%c", (ch
< 0x20)?'.':((ch
> 0x7f)?'.':ch
));
478 static void my_hd(void *p
, int len
)
481 unsigned char *addr
= p
;
483 for (i
=0;i
<len
;i
+=16) {
484 printk ("%p ", addr
+i
);
486 printk ("%02x %s", addr
[j
+i
], (j
==7)?" ":"");
490 printk ("%c", (ch
< 0x20)?'.':((ch
> 0x7f)?'.':ch
));
499 /* This needs redoing for Alpha -- REW -- Done. */
501 static inline void write_sx_byte (struct sx_board
*board
, int offset
, u8 byte
)
503 writeb (byte
, board
->base
+offset
);
506 static inline u8
read_sx_byte (struct sx_board
*board
, int offset
)
508 return readb (board
->base
+offset
);
512 static inline void write_sx_word (struct sx_board
*board
, int offset
, u16 word
)
514 writew (word
, board
->base
+offset
);
517 static inline u16
read_sx_word (struct sx_board
*board
, int offset
)
519 return readw (board
->base
+ offset
);
523 static int sx_busy_wait_eq (struct sx_board
*board
,
524 int offset
, int mask
, int correctval
)
530 for (i
=0; i
< TIMEOUT_1
;i
++)
531 if ((read_sx_byte (board
, offset
) & mask
) == correctval
) {
536 for (i
=0; i
< TIMEOUT_2
;i
++) {
537 if ((read_sx_byte (board
, offset
) & mask
) == correctval
) {
549 static int sx_busy_wait_neq (struct sx_board
*board
,
550 int offset
, int mask
, int badval
)
556 for (i
=0; i
< TIMEOUT_1
;i
++)
557 if ((read_sx_byte (board
, offset
) & mask
) != badval
) {
562 for (i
=0; i
< TIMEOUT_2
;i
++) {
563 if ((read_sx_byte (board
, offset
) & mask
) != badval
) {
576 /* 5.6.4 of 6210028 r2.3 */
577 static int sx_reset (struct sx_board
*board
)
581 if (IS_SX_BOARD (board
)) {
583 write_sx_byte (board
, SX_CONFIG
, 0);
584 write_sx_byte (board
, SX_RESET
, 1); /* Value doesn't matter */
586 if (!sx_busy_wait_eq (board
, SX_RESET_STATUS
, 1, 0)) {
587 printk (KERN_INFO
"sx: Card doesn't respond to reset....\n");
590 } else if (IS_EISA_BOARD(board
)) {
591 outb(board
->irq
<<4, board
->eisa_base
+0xc02);
592 } else if (IS_SI1_BOARD(board
)) {
593 write_sx_byte (board
, SI1_ISA_RESET
, 0); // value does not matter
595 /* Gory details of the SI/ISA board */
596 write_sx_byte (board
, SI2_ISA_RESET
, SI2_ISA_RESET_SET
);
597 write_sx_byte (board
, SI2_ISA_IRQ11
, SI2_ISA_IRQ11_CLEAR
);
598 write_sx_byte (board
, SI2_ISA_IRQ12
, SI2_ISA_IRQ12_CLEAR
);
599 write_sx_byte (board
, SI2_ISA_IRQ15
, SI2_ISA_IRQ15_CLEAR
);
600 write_sx_byte (board
, SI2_ISA_INTCLEAR
, SI2_ISA_INTCLEAR_CLEAR
);
601 write_sx_byte (board
, SI2_ISA_IRQSET
, SI2_ISA_IRQSET_CLEAR
);
609 /* This doesn't work on machines where "NULL" isn't 0 */
610 /* If you have one of those, someone will need to write
611 the equivalent of this, which will amount to about 3 lines. I don't
612 want to complicate this right now. -- REW
613 (See, I do write comments every now and then :-) */
614 #define OFFSETOF(strct, elem) ((long)&(((struct strct *)NULL)->elem))
617 #define CHAN_OFFSET(port,elem) (port->ch_base + OFFSETOF (_SXCHANNEL, elem))
618 #define MODU_OFFSET(board,addr,elem) (addr + OFFSETOF (_SXMODULE, elem))
619 #define BRD_OFFSET(board,elem) (OFFSETOF (_SXCARD, elem))
622 #define sx_write_channel_byte(port, elem, val) \
623 write_sx_byte (port->board, CHAN_OFFSET (port, elem), val)
625 #define sx_read_channel_byte(port, elem) \
626 read_sx_byte (port->board, CHAN_OFFSET (port, elem))
628 #define sx_write_channel_word(port, elem, val) \
629 write_sx_word (port->board, CHAN_OFFSET (port, elem), val)
631 #define sx_read_channel_word(port, elem) \
632 read_sx_word (port->board, CHAN_OFFSET (port, elem))
635 #define sx_write_module_byte(board, addr, elem, val) \
636 write_sx_byte (board, MODU_OFFSET (board, addr, elem), val)
638 #define sx_read_module_byte(board, addr, elem) \
639 read_sx_byte (board, MODU_OFFSET (board, addr, elem))
641 #define sx_write_module_word(board, addr, elem, val) \
642 write_sx_word (board, MODU_OFFSET (board, addr, elem), val)
644 #define sx_read_module_word(board, addr, elem) \
645 read_sx_word (board, MODU_OFFSET (board, addr, elem))
648 #define sx_write_board_byte(board, elem, val) \
649 write_sx_byte (board, BRD_OFFSET (board, elem), val)
651 #define sx_read_board_byte(board, elem) \
652 read_sx_byte (board, BRD_OFFSET (board, elem))
654 #define sx_write_board_word(board, elem, val) \
655 write_sx_word (board, BRD_OFFSET (board, elem), val)
657 #define sx_read_board_word(board, elem) \
658 read_sx_word (board, BRD_OFFSET (board, elem))
661 static int sx_start_board (struct sx_board
*board
)
663 if (IS_SX_BOARD (board
)) {
664 write_sx_byte (board
, SX_CONFIG
, SX_CONF_BUSEN
);
665 } else if (IS_EISA_BOARD(board
)) {
666 write_sx_byte(board
, SI2_EISA_OFF
, SI2_EISA_VAL
);
667 outb((board
->irq
<<4)|4, board
->eisa_base
+0xc02);
668 } else if (IS_SI1_BOARD(board
)) {
669 write_sx_byte (board
, SI1_ISA_RESET_CLEAR
, 0);
670 write_sx_byte (board
, SI1_ISA_INTCL
, 0);
672 /* Don't bug me about the clear_set.
673 I haven't the foggiest idea what it's about -- REW */
674 write_sx_byte (board
, SI2_ISA_RESET
, SI2_ISA_RESET_CLEAR
);
675 write_sx_byte (board
, SI2_ISA_INTCLEAR
, SI2_ISA_INTCLEAR_SET
);
680 #define SX_IRQ_REG_VAL(board) \
681 ((board->flags & SX_ISA_BOARD)?(board->irq << 4):0)
683 /* Note. The SX register is write-only. Therefore, we have to enable the
684 bus too. This is a no-op, if you don't mess with this driver... */
685 static int sx_start_interrupts (struct sx_board
*board
)
688 /* Don't call this with board->irq == 0 */
690 if (IS_SX_BOARD(board
)) {
691 write_sx_byte (board
, SX_CONFIG
, SX_IRQ_REG_VAL (board
) |
694 } else if (IS_EISA_BOARD(board
)) {
695 inb(board
->eisa_base
+0xc03);
696 } else if (IS_SI1_BOARD(board
)) {
697 write_sx_byte (board
, SI1_ISA_INTCL
,0);
698 write_sx_byte (board
, SI1_ISA_INTCL_CLEAR
,0);
700 switch (board
->irq
) {
701 case 11:write_sx_byte (board
, SI2_ISA_IRQ11
, SI2_ISA_IRQ11_SET
);break;
702 case 12:write_sx_byte (board
, SI2_ISA_IRQ12
, SI2_ISA_IRQ12_SET
);break;
703 case 15:write_sx_byte (board
, SI2_ISA_IRQ15
, SI2_ISA_IRQ15_SET
);break;
704 default:printk (KERN_INFO
"sx: SI/XIO card doesn't support interrupt %d.\n",
708 write_sx_byte (board
, SI2_ISA_INTCLEAR
, SI2_ISA_INTCLEAR_SET
);
715 static int sx_send_command (struct sx_port
*port
,
716 int command
, int mask
, int newstat
)
719 write_sx_byte (port
->board
, CHAN_OFFSET (port
, hi_hstat
), command
);
721 return sx_busy_wait_eq (port
->board
, CHAN_OFFSET (port
, hi_hstat
), mask
, newstat
);
725 static char *mod_type_s (int module_type
)
727 switch (module_type
) {
728 case TA4
: return "TA4";
729 case TA8
: return "TA8";
730 case TA4_ASIC
: return "TA4_ASIC";
731 case TA8_ASIC
: return "TA8_ASIC";
732 case MTA_CD1400
:return "MTA_CD1400";
733 case SXDC
: return "SXDC";
734 default:return "Unknown/invalid";
739 static char *pan_type_s (int pan_type
)
742 case MOD_RS232DB25
: return "MOD_RS232DB25";
743 case MOD_RS232RJ45
: return "MOD_RS232RJ45";
744 case MOD_RS422DB25
: return "MOD_RS422DB25";
745 case MOD_PARALLEL
: return "MOD_PARALLEL";
746 case MOD_2_RS232DB25
: return "MOD_2_RS232DB25";
747 case MOD_2_RS232RJ45
: return "MOD_2_RS232RJ45";
748 case MOD_2_RS422DB25
: return "MOD_2_RS422DB25";
749 case MOD_RS232DB25MALE
: return "MOD_RS232DB25MALE";
750 case MOD_2_PARALLEL
: return "MOD_2_PARALLEL";
751 case MOD_BLANK
: return "empty";
752 default:return "invalid";
757 static int mod_compat_type (int module_type
)
759 return module_type
>> 4;
762 static void sx_reconfigure_port(struct sx_port
*port
)
764 if (sx_read_channel_byte (port
, hi_hstat
) == HS_IDLE_OPEN
) {
765 if (sx_send_command (port
, HS_CONFIG
, -1, HS_IDLE_OPEN
) != 1) {
766 printk (KERN_WARNING
"sx: Sent reconfigure command, but card didn't react.\n");
769 sx_dprintk (SX_DEBUG_TERMIOS
,
770 "sx: Not sending reconfigure: port isn't open (%02x).\n",
771 sx_read_channel_byte (port
, hi_hstat
));
775 static void sx_setsignals (struct sx_port
*port
, int dtr
, int rts
)
780 t
= sx_read_channel_byte (port
, hi_op
);
781 if (dtr
>= 0) t
= dtr
? (t
| OP_DTR
): (t
& ~OP_DTR
);
782 if (rts
>= 0) t
= rts
? (t
| OP_RTS
): (t
& ~OP_RTS
);
783 sx_write_channel_byte (port
, hi_op
, t
);
784 sx_dprintk (SX_DEBUG_MODEMSIGNALS
, "setsignals: %d/%d\n", dtr
, rts
);
791 static int sx_getsignals (struct sx_port
*port
)
795 o_stat
= sx_read_channel_byte (port
, hi_op
);
796 i_stat
= sx_read_channel_byte (port
, hi_ip
);
798 sx_dprintk (SX_DEBUG_MODEMSIGNALS
, "getsignals: %d/%d (%d/%d) %02x/%02x\n",
799 (o_stat
& OP_DTR
) != 0, (o_stat
& OP_RTS
) != 0,
800 port
->c_dcd
, sx_get_CD (port
),
801 sx_read_channel_byte (port
, hi_ip
),
802 sx_read_channel_byte (port
, hi_state
));
804 return (((o_stat
& OP_DTR
)?TIOCM_DTR
:0) |
805 ((o_stat
& OP_RTS
)?TIOCM_RTS
:0) |
806 ((i_stat
& IP_CTS
)?TIOCM_CTS
:0) |
807 ((i_stat
& IP_DCD
)?TIOCM_CAR
:0) |
808 ((i_stat
& IP_DSR
)?TIOCM_DSR
:0) |
809 ((i_stat
& IP_RI
)?TIOCM_RNG
:0)
814 static void sx_set_baud (struct sx_port
*port
)
818 if (port
->board
->ta_type
== MOD_SXDC
) {
819 switch (port
->gs
.baud
) {
820 /* Save some typing work... */
821 #define e(x) case x:t= BAUD_ ## x ; break
822 e(50);e(75);e(110);e(150);e(200);e(300);e(600);
823 e(1200);e(1800);e(2000);e(2400);e(4800);e(7200);
824 e(9600);e(14400);e(19200);e(28800);e(38400);
825 e(56000);e(57600);e(64000);e(76800);e(115200);
826 e(128000);e(150000);e(230400);e(256000);e(460800);
828 case 134 :t
= BAUD_134_5
; break;
832 /* Can I return "invalid"? */
834 printk (KERN_INFO
"sx: unsupported baud rate: %d.\n", port
->gs
.baud
);
839 /* The baud rate is not set to 0, so we're enabeling DTR... -- REW */
840 sx_setsignals (port
, 1, -1);
841 /* XXX This is not TA & MTA compatible */
842 sx_write_channel_byte (port
, hi_csr
, 0xff);
844 sx_write_channel_byte (port
, hi_txbaud
, t
);
845 sx_write_channel_byte (port
, hi_rxbaud
, t
);
847 sx_setsignals (port
, 0, -1);
850 switch (port
->gs
.baud
) {
851 #define e(x) case x:t= CSR_ ## x ; break
852 e(75);e(150);e(300);e(600);e(1200);e(2400);e(4800);
854 e(19200);e(57600);e(38400);
855 /* TA supports 110, but not 115200, MTA supports 115200, but not 110 */
857 if (port
->board
->ta_type
== MOD_TA
) {
862 printk (KERN_INFO
"sx: Unsupported baud rate: %d.\n", port
->gs
.baud
);
866 if (port
->board
->ta_type
== MOD_TA
) {
868 printk (KERN_INFO
"sx: Unsupported baud rate: %d.\n", port
->gs
.baud
);
878 printk (KERN_INFO
"sx: Unsupported baud rate: %d.\n", port
->gs
.baud
);
883 sx_setsignals (port
, 1, -1);
884 sx_write_channel_byte (port
, hi_csr
, t
* 0x11);
886 sx_setsignals (port
, 0, -1);
892 /* Simon Allen's version of this routine was 225 lines long. 85 is a lot
895 static int sx_set_real_termios (void *ptr
)
897 struct sx_port
*port
= ptr
;
904 /* What is this doing here? -- REW
905 Ha! figured it out. It is to allow you to get DTR active again
906 if you've dropped it with stty 0. Moved to set_baud, where it
907 belongs (next to the drop dtr if baud == 0) -- REW */
908 /* sx_setsignals (port, 1, -1); */
912 #define CFLAG port->gs.tty->termios->c_cflag
913 sx_write_channel_byte (port
, hi_mr1
,
914 (C_PARENB (port
->gs
.tty
)? MR1_WITH
:MR1_NONE
) |
915 (C_PARODD (port
->gs
.tty
)? MR1_ODD
:MR1_EVEN
) |
916 (C_CRTSCTS(port
->gs
.tty
)? MR1_RTS_RXFLOW
:0) |
917 (((CFLAG
& CSIZE
)==CS8
) ? MR1_8_BITS
:0) |
918 (((CFLAG
& CSIZE
)==CS7
) ? MR1_7_BITS
:0) |
919 (((CFLAG
& CSIZE
)==CS6
) ? MR1_6_BITS
:0) |
920 (((CFLAG
& CSIZE
)==CS5
) ? MR1_5_BITS
:0) );
922 sx_write_channel_byte (port
, hi_mr2
,
923 (C_CRTSCTS(port
->gs
.tty
)?MR2_CTS_TXFLOW
:0) |
924 (C_CSTOPB (port
->gs
.tty
)?MR2_2_STOP
:MR2_1_STOP
));
926 switch (CFLAG
& CSIZE
) {
927 case CS8
:sx_write_channel_byte (port
, hi_mask
, 0xff);break;
928 case CS7
:sx_write_channel_byte (port
, hi_mask
, 0x7f);break;
929 case CS6
:sx_write_channel_byte (port
, hi_mask
, 0x3f);break;
930 case CS5
:sx_write_channel_byte (port
, hi_mask
, 0x1f);break;
932 printk (KERN_INFO
"sx: Invalid wordsize: %u\n", CFLAG
& CSIZE
);
936 sx_write_channel_byte (port
, hi_prtcl
,
937 (I_IXON (port
->gs
.tty
)?SP_TXEN
:0) |
938 (I_IXOFF (port
->gs
.tty
)?SP_RXEN
:0) |
939 (I_IXANY (port
->gs
.tty
)?SP_TANY
:0) |
942 sx_write_channel_byte (port
, hi_break
,
943 (I_IGNBRK(port
->gs
.tty
)?BR_IGN
:0 |
944 I_BRKINT(port
->gs
.tty
)?BR_INT
:0));
946 sx_write_channel_byte (port
, hi_txon
, START_CHAR (port
->gs
.tty
));
947 sx_write_channel_byte (port
, hi_rxon
, START_CHAR (port
->gs
.tty
));
948 sx_write_channel_byte (port
, hi_txoff
, STOP_CHAR (port
->gs
.tty
));
949 sx_write_channel_byte (port
, hi_rxoff
, STOP_CHAR (port
->gs
.tty
));
951 sx_reconfigure_port(port
);
953 /* Tell line discipline whether we will do input cooking */
954 if(I_OTHER(port
->gs
.tty
)) {
955 clear_bit(TTY_HW_COOK_IN
, &port
->gs
.tty
->flags
);
957 set_bit(TTY_HW_COOK_IN
, &port
->gs
.tty
->flags
);
959 sx_dprintk (SX_DEBUG_TERMIOS
, "iflags: %x(%d) ",
960 port
->gs
.tty
->termios
->c_iflag
,
961 I_OTHER(port
->gs
.tty
));
964 /* Tell line discipline whether we will do output cooking.
965 * If OPOST is set and no other output flags are set then we can do output
966 * processing. Even if only *one* other flag in the O_OTHER group is set
967 * we do cooking in software.
969 if(O_OPOST(port
->gs
.tty
) && !O_OTHER(port
->gs
.tty
)) {
970 set_bit(TTY_HW_COOK_OUT
, &port
->gs
.tty
->flags
);
972 clear_bit(TTY_HW_COOK_OUT
, &port
->gs
.tty
->flags
);
974 sx_dprintk (SX_DEBUG_TERMIOS
, "oflags: %x(%d)\n",
975 port
->gs
.tty
->termios
->c_oflag
,
976 O_OTHER(port
->gs
.tty
));
977 /* port->c_dcd = sx_get_CD (port); */
984 /* ********************************************************************** *
985 * the interrupt related routines *
986 * ********************************************************************** */
989 Other drivers use the macro "MIN" to calculate how much to copy.
990 This has the disadvantage that it will evaluate parts twice. That's
991 expensive when it's IO (and the compiler cannot optimize those away!).
992 Moreover, I'm not sure that you're race-free.
994 I assign a value, and then only allow the value to decrease. This
995 is always safe. This makes the code a few lines longer, and you
996 know I'm dead against that, but I think it is required in this
1000 static void sx_transmit_chars (struct sx_port
*port
)
1007 sx_dprintk (SX_DEBUG_TRANSMIT
, "Port %p: transmit %d chars\n",
1008 port
, port
->gs
.xmit_cnt
);
1010 if (test_and_set_bit (SX_PORT_TRANSMIT_LOCK
, &port
->locks
)) {
1015 c
= port
->gs
.xmit_cnt
;
1017 sx_dprintk (SX_DEBUG_TRANSMIT
, "Copying %d ", c
);
1018 tx_ip
= sx_read_channel_byte (port
, hi_txipos
);
1020 /* Took me 5 minutes to deduce this formula.
1021 Luckily it is literally in the manual in section 6.5.4.3.5 */
1022 txroom
= (sx_read_channel_byte (port
, hi_txopos
) - tx_ip
- 1) & 0xff;
1024 /* Don't copy more bytes than there is room for in the buffer */
1027 sx_dprintk (SX_DEBUG_TRANSMIT
, " %d(%d) ", c
, txroom
);
1029 /* Don't copy past the end of the hardware transmit buffer */
1030 if (c
> 0x100 - tx_ip
)
1033 sx_dprintk (SX_DEBUG_TRANSMIT
, " %d(%d) ", c
, 0x100-tx_ip
);
1035 /* Don't copy pas the end of the source buffer */
1036 if (c
> SERIAL_XMIT_SIZE
- port
->gs
.xmit_tail
)
1037 c
= SERIAL_XMIT_SIZE
- port
->gs
.xmit_tail
;
1039 sx_dprintk (SX_DEBUG_TRANSMIT
, " %d(%ld) \n",
1040 c
, SERIAL_XMIT_SIZE
- port
->gs
.xmit_tail
);
1042 /* If for one reason or another, we can't copy more data, we're done! */
1046 memcpy_toio (port
->board
->base
+ CHAN_OFFSET(port
,hi_txbuf
) + tx_ip
,
1047 port
->gs
.xmit_buf
+ port
->gs
.xmit_tail
, c
);
1049 /* Update the pointer in the card */
1050 sx_write_channel_byte (port
, hi_txipos
, (tx_ip
+c
) & 0xff);
1052 /* Update the kernel buffer end */
1053 port
->gs
.xmit_tail
= (port
->gs
.xmit_tail
+ c
) & (SERIAL_XMIT_SIZE
-1);
1055 /* This one last. (this is essential)
1056 It would allow others to start putting more data into the buffer! */
1057 port
->gs
.xmit_cnt
-= c
;
1060 if (port
->gs
.xmit_cnt
== 0) {
1061 sx_disable_tx_interrupts (port
);
1064 if ((port
->gs
.xmit_cnt
<= port
->gs
.wakeup_chars
) && port
->gs
.tty
) {
1065 tty_wakeup(port
->gs
.tty
);
1066 sx_dprintk (SX_DEBUG_TRANSMIT
, "Waking up.... ldisc (%d)....\n",
1067 port
->gs
.wakeup_chars
);
1070 clear_bit (SX_PORT_TRANSMIT_LOCK
, &port
->locks
);
1075 /* Note the symmetry between receiving chars and transmitting them!
1076 Note: The kernel should have implemented both a receive buffer and
1077 a transmit buffer. */
1079 /* Inlined: Called only once. Remove the inline when you add another call */
1080 static inline void sx_receive_chars (struct sx_port
*port
)
1084 struct tty_struct
*tty
;
1091 rx_op
= sx_read_channel_byte (port
, hi_rxopos
);
1092 c
= (sx_read_channel_byte (port
, hi_rxipos
) - rx_op
) & 0xff;
1094 sx_dprintk (SX_DEBUG_RECEIVE
, "rxop=%d, c = %d.\n", rx_op
, c
);
1096 /* Don't copy past the end of the hardware receive buffer */
1097 if (rx_op
+ c
> 0x100) c
= 0x100 - rx_op
;
1099 sx_dprintk (SX_DEBUG_RECEIVE
, "c = %d.\n", c
);
1101 /* Don't copy more bytes than there is room for in the buffer */
1103 c
= tty_prepare_flip_string(tty
, &rp
, c
);
1105 sx_dprintk (SX_DEBUG_RECEIVE
, "c = %d.\n", c
);
1107 /* If for one reason or another, we can't copy more data, we're done! */
1110 sx_dprintk (SX_DEBUG_RECEIVE
, "Copying over %d chars. First is %d at %lx\n", c
,
1111 read_sx_byte (port
->board
, CHAN_OFFSET(port
,hi_rxbuf
) + rx_op
),
1112 CHAN_OFFSET(port
, hi_rxbuf
));
1114 port
->board
->base
+ CHAN_OFFSET(port
,hi_rxbuf
) + rx_op
, c
);
1116 /* This one last. ( Not essential.)
1117 It allows the card to start putting more data into the buffer!
1118 Update the pointer in the card */
1119 sx_write_channel_byte (port
, hi_rxopos
, (rx_op
+ c
) & 0xff);
1126 do_gettimeofday (&tv
);
1127 sx_dprintk (SX_DEBUG_RECEIVE
,
1128 "pushing flipq port %d (%3d chars): %d.%06d (%d/%d)\n",
1130 (int) (tv
.tv_sec
% 60), (int)tv
.tv_usec
, tty
->raw
, tty
->real_raw
);
1132 /* Tell the rest of the system the news. Great news. New characters! */
1133 tty_flip_buffer_push (tty
);
1134 /* tty_schedule_flip (tty); */
1140 /* Inlined: it is called only once. Remove the inline if you add another
1142 static inline void sx_check_modem_signals (struct sx_port
*port
)
1147 hi_state
= sx_read_channel_byte (port
, hi_state
);
1148 sx_dprintk (SX_DEBUG_MODEMSIGNALS
, "Checking modem signals (%d/%d)\n",
1149 port
->c_dcd
, sx_get_CD (port
));
1151 if (hi_state
& ST_BREAK
) {
1152 hi_state
&= ~ST_BREAK
;
1153 sx_dprintk (SX_DEBUG_MODEMSIGNALS
, "got a break.\n");
1154 sx_write_channel_byte (port
, hi_state
, hi_state
);
1155 gs_got_break (&port
->gs
);
1157 if (hi_state
& ST_DCD
) {
1158 hi_state
&= ~ST_DCD
;
1159 sx_dprintk (SX_DEBUG_MODEMSIGNALS
, "got a DCD change.\n");
1160 sx_write_channel_byte (port
, hi_state
, hi_state
);
1161 c_dcd
= sx_get_CD (port
);
1162 sx_dprintk (SX_DEBUG_MODEMSIGNALS
, "DCD is now %d\n", c_dcd
);
1163 if (c_dcd
!= port
->c_dcd
) {
1164 port
->c_dcd
= c_dcd
;
1165 if (sx_get_CD (port
)) {
1167 if ((sx_read_channel_byte(port
, hi_hstat
) != HS_IDLE_CLOSED
) &&
1168 !(port
->gs
.tty
->termios
->c_cflag
& CLOCAL
) ) {
1169 /* Are we blocking in open?*/
1170 sx_dprintk (SX_DEBUG_MODEMSIGNALS
, "DCD active, unblocking open\n");
1171 wake_up_interruptible(&port
->gs
.open_wait
);
1173 sx_dprintk (SX_DEBUG_MODEMSIGNALS
, "DCD raised. Ignoring.\n");
1176 /* DCD went down! */
1177 if (!(port
->gs
.tty
->termios
->c_cflag
& CLOCAL
) ) {
1178 sx_dprintk (SX_DEBUG_MODEMSIGNALS
, "DCD dropped. hanging up....\n");
1179 tty_hangup (port
->gs
.tty
);
1181 sx_dprintk (SX_DEBUG_MODEMSIGNALS
, "DCD dropped. ignoring.\n");
1185 sx_dprintk (SX_DEBUG_MODEMSIGNALS
, "Hmmm. card told us DCD changed, but it didn't.\n");
1191 /* This is what an interrupt routine should look like.
1192 * Small, elegant, clear.
1195 static irqreturn_t
sx_interrupt (int irq
, void *ptr
, struct pt_regs
*regs
)
1197 struct sx_board
*board
= ptr
;
1198 struct sx_port
*port
;
1202 sx_dprintk (SX_DEBUG_FLOW
, "sx: enter sx_interrupt (%d/%d)\n", irq
, board
->irq
);
1204 /* AAargh! The order in which to do these things is essential and
1207 - Rate limit goes before "recursive". Otherwise a series of
1208 recursive calls will hang the machine in the interrupt routine.
1210 - hardware twiddling goes before "recursive". Otherwise when we
1211 poll the card, and a recursive interrupt happens, we won't
1212 ack the card, so it might keep on interrupting us. (especially
1213 level sensitive interrupt systems like PCI).
1215 - Rate limit goes before hardware twiddling. Otherwise we won't
1216 catch a card that has gone bonkers.
1218 - The "initialized" test goes after the hardware twiddling. Otherwise
1219 the card will stick us in the interrupt routine again.
1221 - The initialized test goes before recursive.
1226 #ifdef IRQ_RATE_LIMIT
1227 /* Aaargh! I'm ashamed. This costs more lines-of-code than the
1228 actual interrupt routine!. (Well, used to when I wrote that comment) */
1233 if (lastjif
== jiffies
) {
1234 if (++nintr
> IRQ_RATE_LIMIT
) {
1235 free_irq (board
->irq
, board
);
1236 printk (KERN_ERR
"sx: Too many interrupts. Turning off interrupt %d.\n",
1247 if (board
->irq
== irq
) {
1248 /* Tell the card we've noticed the interrupt. */
1250 sx_write_board_word (board
, cc_int_pending
, 0);
1251 if (IS_SX_BOARD (board
)) {
1252 write_sx_byte (board
, SX_RESET_IRQ
, 1);
1253 } else if (IS_EISA_BOARD(board
)) {
1254 inb(board
->eisa_base
+0xc03);
1255 write_sx_word(board
, 8, 0);
1257 write_sx_byte (board
, SI2_ISA_INTCLEAR
, SI2_ISA_INTCLEAR_CLEAR
);
1258 write_sx_byte (board
, SI2_ISA_INTCLEAR
, SI2_ISA_INTCLEAR_SET
);
1262 if (!sx_initialized
)
1264 if (!(board
->flags
& SX_BOARD_INITIALIZED
))
1267 if (test_and_set_bit (SX_BOARD_INTR_LOCK
, &board
->locks
)) {
1268 printk (KERN_ERR
"Recursive interrupt! (%d)\n", board
->irq
);
1272 for (i
=0;i
<board
->nports
;i
++) {
1273 port
= &board
->ports
[i
];
1274 if (port
->gs
.flags
& GS_ACTIVE
) {
1275 if (sx_read_channel_byte (port
, hi_state
)) {
1276 sx_dprintk (SX_DEBUG_INTERRUPTS
,
1277 "Port %d: modem signal change?... \n", i
);
1278 sx_check_modem_signals (port
);
1280 if (port
->gs
.xmit_cnt
) {
1281 sx_transmit_chars (port
);
1283 if (!(port
->gs
.flags
& SX_RX_THROTTLE
)) {
1284 sx_receive_chars (port
);
1289 clear_bit (SX_BOARD_INTR_LOCK
, &board
->locks
);
1291 sx_dprintk (SX_DEBUG_FLOW
, "sx: exit sx_interrupt (%d/%d)\n", irq
, board
->irq
);
1297 static void sx_pollfunc (unsigned long data
)
1299 struct sx_board
*board
= (struct sx_board
*) data
;
1303 sx_interrupt (0, board
, NULL
);
1305 init_timer(&board
->timer
);
1307 board
->timer
.expires
= jiffies
+ sx_poll
;
1308 add_timer (&board
->timer
);
1314 /* ********************************************************************** *
1315 * Here are the routines that actually *
1316 * interface with the generic_serial driver *
1317 * ********************************************************************** */
1319 /* Ehhm. I don't know how to fiddle with interrupts on the SX card. --REW */
1320 /* Hmm. Ok I figured it out. You don't. */
1322 static void sx_disable_tx_interrupts (void * ptr
)
1324 struct sx_port
*port
= ptr
;
1327 port
->gs
.flags
&= ~GS_TX_INTEN
;
1333 static void sx_enable_tx_interrupts (void * ptr
)
1335 struct sx_port
*port
= ptr
;
1339 /* First transmit the characters that we're supposed to */
1340 sx_transmit_chars (port
);
1342 /* The sx card will never interrupt us if we don't fill the buffer
1343 past 25%. So we keep considering interrupts off if that's the case. */
1344 data_in_buffer
= (sx_read_channel_byte (port
, hi_txipos
) -
1345 sx_read_channel_byte (port
, hi_txopos
)) & 0xff;
1347 /* XXX Must be "HIGH_WATER" for SI card according to doc. */
1348 if (data_in_buffer
< LOW_WATER
)
1349 port
->gs
.flags
&= ~GS_TX_INTEN
;
1355 static void sx_disable_rx_interrupts (void * ptr
)
1357 /* struct sx_port *port = ptr; */
1363 static void sx_enable_rx_interrupts (void * ptr
)
1365 /* struct sx_port *port = ptr; */
1372 /* Jeez. Isn't this simple? */
1373 static int sx_get_CD (void * ptr
)
1375 struct sx_port
*port
= ptr
;
1379 return ((sx_read_channel_byte (port
, hi_ip
) & IP_DCD
) != 0);
1383 /* Jeez. Isn't this simple? */
1384 static int sx_chars_in_buffer (void * ptr
)
1386 struct sx_port
*port
= ptr
;
1390 return ((sx_read_channel_byte (port
, hi_txipos
) -
1391 sx_read_channel_byte (port
, hi_txopos
)) & 0xff);
1395 static void sx_shutdown_port (void * ptr
)
1397 struct sx_port
*port
= ptr
;
1401 port
->gs
.flags
&= ~ GS_ACTIVE
;
1402 if (port
->gs
.tty
&& (port
->gs
.tty
->termios
->c_cflag
& HUPCL
)) {
1403 sx_setsignals (port
, 0, 0);
1404 sx_reconfigure_port(port
);
1414 /* ********************************************************************** *
1415 * Here are the routines that actually *
1416 * interface with the rest of the system *
1417 * ********************************************************************** */
1419 static int sx_open (struct tty_struct
* tty
, struct file
* filp
)
1421 struct sx_port
*port
;
1423 unsigned long flags
;
1427 if (!sx_initialized
) {
1432 sx_dprintk (SX_DEBUG_OPEN
, "%d: opening line %d. tty=%p ctty=%p, np=%d)\n",
1433 current
->pid
, line
, tty
, current
->signal
->tty
, sx_nports
);
1435 if ((line
< 0) || (line
>= SX_NPORTS
) || (line
>= sx_nports
))
1438 port
= & sx_ports
[line
];
1439 port
->c_dcd
= 0; /* Make sure that the first interrupt doesn't detect a
1440 1 -> 0 transition. */
1443 sx_dprintk (SX_DEBUG_OPEN
, "port = %p c_dcd = %d\n", port
, port
->c_dcd
);
1445 spin_lock_irqsave(&port
->gs
.driver_lock
, flags
);
1447 tty
->driver_data
= port
;
1450 spin_unlock_irqrestore(&port
->gs
.driver_lock
, flags
);
1452 sx_dprintk (SX_DEBUG_OPEN
, "starting port\n");
1455 * Start up serial port
1457 retval
= gs_init_port(&port
->gs
);
1458 sx_dprintk (SX_DEBUG_OPEN
, "done gs_init\n");
1464 port
->gs
.flags
|= GS_ACTIVE
;
1465 if (port
->gs
.count
<= 1)
1466 sx_setsignals (port
, 1,1);
1469 if (sx_debug
& SX_DEBUG_OPEN
)
1470 my_hd (port
, sizeof (*port
));
1472 if (sx_debug
& SX_DEBUG_OPEN
)
1473 my_hd_io (port
->board
->base
+ port
->ch_base
, sizeof (*port
));
1476 if (port
->gs
.count
<= 1) {
1477 if (sx_send_command (port
, HS_LOPEN
, -1, HS_IDLE_OPEN
) != 1) {
1478 printk (KERN_ERR
"sx: Card didn't respond to LOPEN command.\n");
1479 spin_lock_irqsave(&port
->gs
.driver_lock
, flags
);
1481 spin_unlock_irqrestore(&port
->gs
.driver_lock
, flags
);
1486 retval
= gs_block_til_ready(port
, filp
);
1487 sx_dprintk (SX_DEBUG_OPEN
, "Block til ready returned %d. Count=%d\n",
1488 retval
, port
->gs
.count
);
1492 * Don't lower gs.count here because sx_close() will be called later
1497 /* tty->low_latency = 1; */
1499 port
->c_dcd
= sx_get_CD (port
);
1500 sx_dprintk (SX_DEBUG_OPEN
, "at open: cd=%d\n", port
->c_dcd
);
1508 static void sx_close (void *ptr
)
1510 struct sx_port
*port
= ptr
;
1511 /* Give the port 5 seconds to close down. */
1516 sx_setsignals (port
, 0, 0);
1517 sx_reconfigure_port(port
);
1518 sx_send_command (port
, HS_CLOSE
, 0, 0);
1520 while (to
-- && (sx_read_channel_byte (port
, hi_hstat
) != HS_IDLE_CLOSED
))
1521 if (msleep_interruptible(10))
1523 if (sx_read_channel_byte (port
, hi_hstat
) != HS_IDLE_CLOSED
) {
1524 if (sx_send_command (port
, HS_FORCE_CLOSED
, -1, HS_IDLE_CLOSED
) != 1) {
1526 "sx: sent the force_close command, but card didn't react\n");
1528 sx_dprintk (SX_DEBUG_CLOSE
, "sent the force_close command.\n");
1531 sx_dprintk (SX_DEBUG_CLOSE
, "waited %d jiffies for close. count=%d\n",
1532 5 * HZ
- to
- 1, port
->gs
.count
);
1534 if(port
->gs
.count
) {
1535 sx_dprintk(SX_DEBUG_CLOSE
, "WARNING port count:%d\n", port
->gs
.count
);
1536 //printk ("%s SETTING port count to zero: %p count: %d\n", __FUNCTION__, port, port->gs.count);
1537 //port->gs.count = 0;
1545 /* This is relatively thorough. But then again it is only 20 lines. */
1546 #define MARCHUP for (i=min;i<max;i++)
1547 #define MARCHDOWN for (i=max-1;i>=min;i--)
1548 #define W0 write_sx_byte (board, i, 0x55)
1549 #define W1 write_sx_byte (board, i, 0xaa)
1550 #define R0 if (read_sx_byte (board, i) != 0x55) return 1
1551 #define R1 if (read_sx_byte (board, i) != 0xaa) return 1
1553 /* This memtest takes a human-noticable time. You normally only do it
1554 once a boot, so I guess that it is worth it. */
1555 static int do_memtest (struct sx_board
*board
, int min
, int max
)
1559 /* This is a marchb. Theoretically, marchb catches much more than
1560 simpler tests. In practise, the longer test just catches more
1561 intermittent errors. -- REW
1562 (For the theory behind memory testing see:
1563 Testing Semiconductor Memories by A.J. van de Goor.) */
1565 MARCHUP
{R0
;W1
;R1
;W0
;R0
;W1
;}
1567 MARCHDOWN
{R1
;W0
;W1
;W0
;}
1568 MARCHDOWN
{R0
;W1
;W0
;}
1581 #define MARCHUP for (i=min;i<max;i+=2)
1582 #define MARCHDOWN for (i=max-1;i>=min;i-=2)
1583 #define W0 write_sx_word (board, i, 0x55aa)
1584 #define W1 write_sx_word (board, i, 0xaa55)
1585 #define R0 if (read_sx_word (board, i) != 0x55aa) return 1
1586 #define R1 if (read_sx_word (board, i) != 0xaa55) return 1
1589 /* This memtest takes a human-noticable time. You normally only do it
1590 once a boot, so I guess that it is worth it. */
1591 static int do_memtest_w (struct sx_board
*board
, int min
, int max
)
1596 MARCHUP
{R0
;W1
;R1
;W0
;R0
;W1
;}
1598 MARCHDOWN
{R1
;W0
;W1
;W0
;}
1599 MARCHDOWN
{R0
;W1
;W0
;}
1606 static int sx_fw_ioctl (struct inode
*inode
, struct file
*filp
,
1607 unsigned int cmd
, unsigned long arg
)
1610 int __user
*descr
= (int __user
*)arg
;
1612 static struct sx_board
*board
= NULL
;
1620 /* Removed superuser check: Sysops can use the permissions on the device
1621 file to restrict access. Recommendation: Root only. (root.root 600) */
1622 if (!capable(CAP_SYS_ADMIN
)) {
1627 sx_dprintk (SX_DEBUG_FIRMWARE
, "IOCTL %x: %lx\n", cmd
, arg
);
1629 if (!board
) board
= &boards
[0];
1630 if (board
->flags
& SX_BOARD_PRESENT
) {
1631 sx_dprintk (SX_DEBUG_FIRMWARE
, "Board present! (%x)\n",
1634 sx_dprintk (SX_DEBUG_FIRMWARE
, "Board not present! (%x) all:",
1636 for (i
=0;i
< SX_NBOARDS
;i
++)
1637 sx_dprintk (SX_DEBUG_FIRMWARE
, "<%x> ", boards
[i
].flags
);
1638 sx_dprintk (SX_DEBUG_FIRMWARE
, "\n");
1643 case SXIO_SET_BOARD
:
1644 sx_dprintk (SX_DEBUG_FIRMWARE
, "set board to %ld\n", arg
);
1645 if (arg
>= SX_NBOARDS
) return -EIO
;
1646 sx_dprintk (SX_DEBUG_FIRMWARE
, "not out of range\n");
1647 if (!(boards
[arg
].flags
& SX_BOARD_PRESENT
)) return -EIO
;
1648 sx_dprintk (SX_DEBUG_FIRMWARE
, ".. and present!\n");
1649 board
= &boards
[arg
];
1652 rc
= -ENOENT
; /* If we manage to miss one, return error. */
1653 if (IS_SX_BOARD (board
)) rc
= SX_TYPE_SX
;
1654 if (IS_CF_BOARD (board
)) rc
= SX_TYPE_CF
;
1655 if (IS_SI_BOARD (board
)) rc
= SX_TYPE_SI
;
1656 if (IS_SI1_BOARD (board
)) rc
= SX_TYPE_SI
;
1657 if (IS_EISA_BOARD (board
)) rc
= SX_TYPE_SI
;
1658 sx_dprintk (SX_DEBUG_FIRMWARE
, "returning type= %d\n", rc
);
1660 case SXIO_DO_RAMTEST
:
1661 if (sx_initialized
) /* Already initialized: better not ramtest the board. */
1663 if (IS_SX_BOARD (board
)) {
1664 rc
= do_memtest (board
, 0, 0x7000);
1665 if (!rc
) rc
= do_memtest (board
, 0, 0x7000);
1666 /*if (!rc) rc = do_memtest_w (board, 0, 0x7000);*/
1668 rc
= do_memtest (board
, 0, 0x7ff8);
1669 /* if (!rc) rc = do_memtest_w (board, 0, 0x7ff8); */
1671 sx_dprintk (SX_DEBUG_FIRMWARE
, "returning memtest result= %d\n", rc
);
1674 if (sx_initialized
) /* Already initialized */
1676 if (!sx_reset (board
))
1678 sx_dprintk (SX_DEBUG_INIT
, "reset the board...\n");
1680 tmp
= kmalloc (SX_CHUNK_SIZE
, GFP_USER
);
1681 if (!tmp
) return -ENOMEM
;
1682 get_user (nbytes
, descr
++);
1683 get_user (offset
, descr
++);
1684 get_user (data
, descr
++);
1685 while (nbytes
&& data
) {
1686 for (i
=0;i
<nbytes
;i
+= SX_CHUNK_SIZE
) {
1687 if (copy_from_user(tmp
, (char __user
*)data
+i
,
1688 (i
+ SX_CHUNK_SIZE
>
1689 nbytes
) ? nbytes
- i
:
1694 memcpy_toio(board
->base2
+ offset
+ i
, tmp
,
1695 (i
+SX_CHUNK_SIZE
>nbytes
)?nbytes
-i
:SX_CHUNK_SIZE
);
1698 get_user (nbytes
, descr
++);
1699 get_user (offset
, descr
++);
1700 get_user (data
, descr
++);
1703 sx_nports
+= sx_init_board (board
);
1707 if (sx_initialized
) /* Already initialized */
1709 /* This is not allowed until all boards are initialized... */
1710 for (i
=0;i
<SX_NBOARDS
;i
++) {
1711 if ( (boards
[i
].flags
& SX_BOARD_PRESENT
) &&
1712 !(boards
[i
].flags
& SX_BOARD_INITIALIZED
))
1715 for (i
=0;i
<SX_NBOARDS
;i
++)
1716 if (!(boards
[i
].flags
& SX_BOARD_PRESENT
)) break;
1718 sx_dprintk (SX_DEBUG_FIRMWARE
, "initing portstructs, %d boards, "
1719 "%d channels, first board: %d ports\n",
1720 i
, sx_nports
, boards
[0].nports
);
1721 rc
= sx_init_portstructs (i
, sx_nports
);
1732 case SXIO_GETGSDEBUG
:
1733 case SXIO_SETGSDEBUG
:
1736 case SXIO_GETNPORTS
:
1740 printk (KERN_WARNING
"Unknown ioctl on firmware device (%x).\n", cmd
);
1748 static void sx_break (struct tty_struct
* tty
, int flag
)
1750 struct sx_port
*port
= tty
->driver_data
;
1756 rv
= sx_send_command (port
, HS_START
, -1, HS_IDLE_BREAK
);
1758 rv
= sx_send_command (port
, HS_STOP
, -1, HS_IDLE_OPEN
);
1759 if (rv
!= 1) printk (KERN_ERR
"sx: couldn't send break (%x).\n",
1760 read_sx_byte (port
->board
, CHAN_OFFSET (port
, hi_hstat
)));
1766 static int sx_tiocmget(struct tty_struct
*tty
, struct file
*file
)
1768 struct sx_port
*port
= tty
->driver_data
;
1769 return sx_getsignals(port
);
1772 static int sx_tiocmset(struct tty_struct
*tty
, struct file
*file
,
1773 unsigned int set
, unsigned int clear
)
1775 struct sx_port
*port
= tty
->driver_data
;
1776 int rts
= -1, dtr
= -1;
1778 if (set
& TIOCM_RTS
)
1780 if (set
& TIOCM_DTR
)
1782 if (clear
& TIOCM_RTS
)
1784 if (clear
& TIOCM_DTR
)
1787 sx_setsignals(port
, dtr
, rts
);
1788 sx_reconfigure_port(port
);
1792 static int sx_ioctl (struct tty_struct
* tty
, struct file
* filp
,
1793 unsigned int cmd
, unsigned long arg
)
1796 struct sx_port
*port
= tty
->driver_data
;
1797 void __user
*argp
= (void __user
*)arg
;
1800 /* func_enter2(); */
1805 rc
= put_user(((tty
->termios
->c_cflag
& CLOCAL
) ? 1 : 0),
1806 (unsigned __user
*) argp
);
1809 if ((rc
= get_user(ival
, (unsigned __user
*) argp
)) == 0) {
1810 tty
->termios
->c_cflag
=
1811 (tty
->termios
->c_cflag
& ~CLOCAL
) |
1812 (ival
? CLOCAL
: 0);
1816 rc
= gs_getserial(&port
->gs
, argp
);
1819 rc
= gs_setserial(&port
->gs
, argp
);
1831 /* The throttle/unthrottle scheme for the Specialix card is different
1832 * from other drivers and deserves some explanation.
1833 * The Specialix hardware takes care of XON/XOFF
1834 * and CTS/RTS flow control itself. This means that all we have to
1835 * do when signalled by the upper tty layer to throttle/unthrottle is
1836 * to make a note of it here. When we come to read characters from the
1837 * rx buffers on the card (sx_receive_chars()) we look to see if the
1838 * upper layer can accept more (as noted here in sx_rx_throt[]).
1839 * If it can't we simply don't remove chars from the cards buffer.
1840 * When the tty layer can accept chars, we again note that here and when
1841 * sx_receive_chars() is called it will remove them from the cards buffer.
1842 * The card will notice that a ports buffer has drained below some low
1843 * water mark and will unflow control the line itself, using whatever
1844 * flow control scheme is in use for that port. -- Simon Allen
1847 static void sx_throttle (struct tty_struct
* tty
)
1849 struct sx_port
*port
= (struct sx_port
*)tty
->driver_data
;
1852 /* If the port is using any type of input flow
1853 * control then throttle the port.
1855 if((tty
->termios
->c_cflag
& CRTSCTS
) || (I_IXOFF(tty
)) ) {
1856 port
->gs
.flags
|= SX_RX_THROTTLE
;
1862 static void sx_unthrottle (struct tty_struct
* tty
)
1864 struct sx_port
*port
= (struct sx_port
*)tty
->driver_data
;
1867 /* Always unthrottle even if flow control is not enabled on
1868 * this port in case we disabled flow control while the port
1871 port
->gs
.flags
&= ~SX_RX_THROTTLE
;
1877 /* ********************************************************************** *
1878 * Here are the initialization routines. *
1879 * ********************************************************************** */
1884 static int sx_init_board (struct sx_board
*board
)
1892 /* This is preceded by downloading the download code. */
1894 board
->flags
|= SX_BOARD_INITIALIZED
;
1896 if (read_sx_byte (board
, 0))
1897 /* CF boards may need this. */
1898 write_sx_byte(board
,0, 0);
1900 /* This resets the processor again, to make sure it didn't do any
1901 foolish things while we were downloading the image */
1902 if (!sx_reset (board
))
1905 sx_start_board (board
);
1907 if (!sx_busy_wait_neq (board
, 0, 0xff, 0)) {
1908 printk (KERN_ERR
"sx: Ooops. Board won't initialize.\n");
1912 /* Ok. So now the processor on the card is running. It gathered
1913 some info for us... */
1914 sx_dprintk (SX_DEBUG_INIT
, "The sxcard structure:\n");
1915 if (sx_debug
& SX_DEBUG_INIT
) my_hd_io (board
->base
, 0x10);
1916 sx_dprintk (SX_DEBUG_INIT
, "the first sx_module structure:\n");
1917 if (sx_debug
& SX_DEBUG_INIT
) my_hd_io (board
->base
+ 0x80, 0x30);
1919 sx_dprintk (SX_DEBUG_INIT
,
1920 "init_status: %x, %dk memory, firmware V%x.%02x,\n",
1921 read_sx_byte (board
, 0), read_sx_byte(board
, 1),
1922 read_sx_byte (board
, 5), read_sx_byte(board
, 4));
1924 if (read_sx_byte (board
, 0) == 0xff) {
1925 printk (KERN_INFO
"sx: No modules found. Sorry.\n");
1932 if (IS_SX_BOARD(board
)) {
1933 sx_write_board_word (board
, cc_int_count
, sx_maxints
);
1936 sx_write_board_word (board
, cc_int_count
, SI_PROCESSOR_CLOCK
/8/sx_maxints
);
1939 /* grab the first module type... */
1940 /* board->ta_type = mod_compat_type (read_sx_byte (board, 0x80 + 0x08)); */
1941 board
->ta_type
= mod_compat_type (sx_read_module_byte (board
, 0x80, mc_chip
));
1944 for (addr
= 0x80;addr
!= 0;addr
= read_sx_word (board
, addr
) & 0x7fff) {
1945 type
= sx_read_module_byte (board
, addr
, mc_chip
);
1946 sx_dprintk (SX_DEBUG_INIT
, "Module at %x: %d channels\n",
1947 addr
, read_sx_byte (board
, addr
+ 2));
1949 chans
+= sx_read_module_byte (board
, addr
, mc_type
);
1951 sx_dprintk (SX_DEBUG_INIT
, "module is an %s, which has %s/%s panels\n",
1953 pan_type_s (sx_read_module_byte (board
, addr
, mc_mods
) & 0xf),
1954 pan_type_s (sx_read_module_byte (board
, addr
, mc_mods
) >> 4));
1956 sx_dprintk (SX_DEBUG_INIT
, "CD1400 versions: %x/%x, ASIC version: %x\n",
1957 sx_read_module_byte (board
, addr
, mc_rev1
),
1958 sx_read_module_byte (board
, addr
, mc_rev2
),
1959 sx_read_module_byte (board
, addr
, mc_mtaasic_rev
));
1961 /* The following combinations are illegal: It should theoretically
1962 work, but timing problems make the bus HANG. */
1964 if (mod_compat_type (type
) != board
->ta_type
) {
1965 printk (KERN_ERR
"sx: This is an invalid configuration.\n"
1966 "Don't mix TA/MTA/SXDC on the same hostadapter.\n");
1970 if ((IS_EISA_BOARD(board
) ||
1971 IS_SI_BOARD(board
)) && (mod_compat_type(type
) == 4)) {
1972 printk (KERN_ERR
"sx: This is an invalid configuration.\n"
1973 "Don't use SXDCs on an SI/XIO adapter.\n");
1977 #if 0 /* Problem fixed: firmware 3.05 */
1978 if (IS_SX_BOARD(board
) && (type
== TA8
)) {
1979 /* There are some issues with the firmware and the DCD/RTS
1980 lines. It might work if you tie them together or something.
1981 It might also work if you get a newer sx_firmware. Therefore
1982 this is just a warning. */
1983 printk (KERN_WARNING
"sx: The SX host doesn't work too well "
1984 "with the TA8 adapters.\nSpecialix is working on it.\n");
1990 /* board->flags |= SX_BOARD_PRESENT; */
1991 if(board
->irq
> 0) {
1992 /* fixed irq, probably PCI */
1993 if(sx_irqmask
& (1 << board
->irq
)) { /* may we use this irq? */
1994 if(request_irq(board
->irq
, sx_interrupt
, IRQF_SHARED
| IRQF_DISABLED
, "sx", board
)) {
1995 printk(KERN_ERR
"sx: Cannot allocate irq %d.\n", board
->irq
);
2000 } else if(board
->irq
< 0 && sx_irqmask
) {
2001 /* auto-allocate irq */
2003 int irqmask
= sx_irqmask
& (IS_SX_BOARD(board
) ? SX_ISA_IRQ_MASK
: SI2_ISA_IRQ_MASK
);
2004 for(irqnr
= 15; irqnr
> 0; irqnr
--)
2005 if(irqmask
& (1 << irqnr
))
2006 if(! request_irq(irqnr
, sx_interrupt
, IRQF_SHARED
| IRQF_DISABLED
, "sx", board
))
2009 printk(KERN_ERR
"sx: Cannot allocate IRQ.\n");
2015 /* Found a valid interrupt, start up interrupts! */
2016 sx_dprintk (SX_DEBUG_INIT
, "Using irq %d.\n", board
->irq
);
2017 sx_start_interrupts (board
);
2018 board
->poll
= sx_slowpoll
;
2019 board
->flags
|= SX_IRQ_ALLOCATED
;
2021 /* no irq: setup board for polled operation */
2022 board
->poll
= sx_poll
;
2023 sx_dprintk (SX_DEBUG_INIT
, "Using poll-interval %d.\n", board
->poll
);
2026 /* The timer should be initialized anyway: That way we can safely
2027 del_timer it when the module is unloaded. */
2028 init_timer (&board
->timer
);
2031 board
->timer
.data
= (unsigned long) board
;
2032 board
->timer
.function
= sx_pollfunc
;
2033 board
->timer
.expires
= jiffies
+ board
->poll
;
2034 add_timer (&board
->timer
);
2040 board
->nports
= chans
;
2041 sx_dprintk (SX_DEBUG_INIT
, "returning %d ports.", board
->nports
);
2048 static void printheader(void)
2050 static int header_printed
;
2052 if (!header_printed
) {
2053 printk (KERN_INFO
"Specialix SX driver "
2054 "(C) 1998/1999 R.E.Wolff@BitWizard.nl \n");
2055 printk (KERN_INFO
"sx: version %s\n", RCS_ID
);
2061 static int probe_sx (struct sx_board
*board
)
2063 struct vpd_prom vpdp
;
2069 if (!IS_CF_BOARD (board
)) {
2070 sx_dprintk (SX_DEBUG_PROBE
, "Going to verify vpd prom at %p.\n",
2071 board
->base
+ SX_VPD_ROM
);
2073 if (sx_debug
& SX_DEBUG_PROBE
)
2074 my_hd_io(board
->base
+ SX_VPD_ROM
, 0x40);
2077 for (i
=0;i
< sizeof (struct vpd_prom
);i
++)
2078 *p
++ = read_sx_byte (board
, SX_VPD_ROM
+ i
*2);
2080 if (sx_debug
& SX_DEBUG_PROBE
)
2081 my_hd (&vpdp
, 0x20);
2083 sx_dprintk (SX_DEBUG_PROBE
, "checking identifier...\n");
2085 if (strncmp (vpdp
.identifier
, SX_VPD_IDENT_STRING
, 16) != 0) {
2086 sx_dprintk (SX_DEBUG_PROBE
, "Got non-SX identifier: '%s'\n",
2094 if (!IS_CF_BOARD (board
)) {
2095 printk (KERN_DEBUG
"sx: Found an SX board at %lx\n", board
->hw_base
);
2096 printk (KERN_DEBUG
"sx: hw_rev: %d, assembly level: %d, uniq ID:%08x, ",
2097 vpdp
.hwrev
, vpdp
.hwass
, vpdp
.uniqid
);
2098 printk ( "Manufactured: %d/%d\n",
2099 1970 + vpdp
.myear
, vpdp
.mweek
);
2102 if ((((vpdp
.uniqid
>> 24) & SX_UNIQUEID_MASK
) != SX_PCI_UNIQUEID1
) &&
2103 (((vpdp
.uniqid
>> 24) & SX_UNIQUEID_MASK
) != SX_ISA_UNIQUEID1
)) {
2104 /* This might be a bit harsh. This was the primary reason the
2105 SX/ISA card didn't work at first... */
2106 printk (KERN_ERR
"sx: Hmm. Not an SX/PCI or SX/ISA card. Sorry: giving up.\n");
2110 if (((vpdp
.uniqid
>> 24) & SX_UNIQUEID_MASK
) == SX_ISA_UNIQUEID1
) {
2111 if (((unsigned long)board
->hw_base
) & 0x8000) {
2112 printk (KERN_WARNING
"sx: Warning: There may be hardware problems with the card at %lx.\n", board
->hw_base
);
2113 printk (KERN_WARNING
"sx: Read sx.txt for more info.\n");
2120 /* This resets the processor, and keeps it off the bus. */
2121 if (!sx_reset (board
))
2123 sx_dprintk (SX_DEBUG_INIT
, "reset the board...\n");
2125 board
->flags
|= SX_BOARD_PRESENT
;
2133 /* Specialix probes for this card at 32k increments from 640k to 16M.
2134 I consider machines with less than 16M unlikely nowadays, so I'm
2135 not probing above 1Mb. Also, 0xa0000, 0xb0000, are taken by the VGA
2136 card. 0xe0000 and 0xf0000 are taken by the BIOS. That only leaves
2137 0xc0000, 0xc8000, 0xd0000 and 0xd8000 . */
2139 static int probe_si (struct sx_board
*board
)
2144 sx_dprintk (SX_DEBUG_PROBE
, "Going to verify SI signature hw %lx at %p.\n", board
->hw_base
,
2145 board
->base
+ SI2_ISA_ID_BASE
);
2147 if (sx_debug
& SX_DEBUG_PROBE
)
2148 my_hd_io(board
->base
+ SI2_ISA_ID_BASE
, 0x8);
2150 if (!IS_EISA_BOARD(board
)) {
2151 if( IS_SI1_BOARD(board
) )
2154 write_sx_byte (board
, SI2_ISA_ID_BASE
+7-i
,i
);
2159 if ((read_sx_byte (board
, SI2_ISA_ID_BASE
+7-i
) & 7) != i
) {
2166 /* Now we're pretty much convinced that there is an SI board here,
2167 but to prevent trouble, we'd better double check that we don't
2168 have an SI1 board when we're probing for an SI2 board.... */
2170 write_sx_byte (board
, SI2_ISA_ID_BASE
,0x10);
2171 if ( IS_SI1_BOARD(board
)) {
2172 /* This should be an SI1 board, which has this
2173 location writable... */
2174 if (read_sx_byte (board
, SI2_ISA_ID_BASE
) != 0x10) {
2179 /* This should be an SI2 board, which has the bottom
2180 3 bits non-writable... */
2181 if (read_sx_byte (board
, SI2_ISA_ID_BASE
) == 0x10) {
2187 /* Now we're pretty much convinced that there is an SI board here,
2188 but to prevent trouble, we'd better double check that we don't
2189 have an SI1 board when we're probing for an SI2 board.... */
2191 write_sx_byte (board
, SI2_ISA_ID_BASE
,0x10);
2192 if ( IS_SI1_BOARD(board
)) {
2193 /* This should be an SI1 board, which has this
2194 location writable... */
2195 if (read_sx_byte (board
, SI2_ISA_ID_BASE
) != 0x10) {
2200 /* This should be an SI2 board, which has the bottom
2201 3 bits non-writable... */
2202 if (read_sx_byte (board
, SI2_ISA_ID_BASE
) == 0x10) {
2210 printk (KERN_DEBUG
"sx: Found an SI board at %lx\n", board
->hw_base
);
2211 /* Compared to the SX boards, it is a complete guess as to what
2212 this card is up to... */
2216 /* This resets the processor, and keeps it off the bus. */
2217 if (!sx_reset (board
))
2219 sx_dprintk (SX_DEBUG_INIT
, "reset the board...\n");
2221 board
->flags
|= SX_BOARD_PRESENT
;
2227 static const struct tty_operations sx_ops
= {
2228 .break_ctl
= sx_break
,
2232 .put_char
= gs_put_char
,
2233 .flush_chars
= gs_flush_chars
,
2234 .write_room
= gs_write_room
,
2235 .chars_in_buffer
= gs_chars_in_buffer
,
2236 .flush_buffer
= gs_flush_buffer
,
2238 .throttle
= sx_throttle
,
2239 .unthrottle
= sx_unthrottle
,
2240 .set_termios
= gs_set_termios
,
2243 .hangup
= gs_hangup
,
2244 .tiocmget
= sx_tiocmget
,
2245 .tiocmset
= sx_tiocmset
,
2248 static int sx_init_drivers(void)
2254 sx_driver
= alloc_tty_driver(sx_nports
);
2257 sx_driver
->owner
= THIS_MODULE
;
2258 sx_driver
->driver_name
= "specialix_sx";
2259 sx_driver
->name
= "ttyX";
2260 sx_driver
->major
= SX_NORMAL_MAJOR
;
2261 sx_driver
->type
= TTY_DRIVER_TYPE_SERIAL
;
2262 sx_driver
->subtype
= SERIAL_TYPE_NORMAL
;
2263 sx_driver
->init_termios
= tty_std_termios
;
2264 sx_driver
->init_termios
.c_cflag
=
2265 B9600
| CS8
| CREAD
| HUPCL
| CLOCAL
;
2266 sx_driver
->flags
= TTY_DRIVER_REAL_RAW
;
2267 tty_set_operations(sx_driver
, &sx_ops
);
2269 if ((error
= tty_register_driver(sx_driver
))) {
2270 put_tty_driver(sx_driver
);
2271 printk(KERN_ERR
"sx: Couldn't register sx driver, error = %d\n",
2280 static void * ckmalloc (int size
)
2284 p
= kmalloc(size
, GFP_KERNEL
);
2291 static int sx_init_portstructs (int nboards
, int nports
)
2293 struct sx_board
*board
;
2294 struct sx_port
*port
;
2301 /* Many drivers statically allocate the maximum number of ports
2302 There is no reason not to allocate them dynamically. Is there? -- REW */
2303 sx_ports
= ckmalloc(nports
* sizeof (struct sx_port
));
2308 for (i
= 0; i
< nboards
; i
++) {
2310 board
->ports
= port
;
2311 for (j
=0; j
< boards
[i
].nports
;j
++) {
2312 sx_dprintk (SX_DEBUG_INIT
, "initing port %d\n", j
);
2313 port
->gs
.magic
= SX_MAGIC
;
2314 port
->gs
.close_delay
= HZ
/2;
2315 port
->gs
.closing_wait
= 30 * HZ
;
2316 port
->board
= board
;
2317 port
->gs
.rd
= &sx_real_driver
;
2318 #ifdef NEW_WRITE_LOCKING
2319 port
->gs
.port_write_mutex
= MUTEX
;
2321 spin_lock_init(&port
->gs
.driver_lock
);
2323 * Initializing wait queue
2325 init_waitqueue_head(&port
->gs
.open_wait
);
2326 init_waitqueue_head(&port
->gs
.close_wait
);
2334 for (i
= 0; i
< nboards
; i
++) {
2336 board
->port_base
= portno
;
2337 /* Possibly the configuration was rejected. */
2338 sx_dprintk (SX_DEBUG_PROBE
, "Board has %d channels\n", board
->nports
);
2339 if (board
->nports
<= 0) continue;
2340 /* XXX byteorder ?? */
2341 for (addr
= 0x80;addr
!= 0;addr
= read_sx_word (board
, addr
) & 0x7fff) {
2342 chans
= sx_read_module_byte (board
, addr
, mc_type
);
2343 sx_dprintk (SX_DEBUG_PROBE
, "Module at %x: %d channels\n", addr
, chans
);
2344 sx_dprintk (SX_DEBUG_PROBE
, "Port at");
2345 for (j
=0;j
<chans
;j
++) {
2346 /* The "sx-way" is the way it SHOULD be done. That way in the
2347 future, the firmware may for example pack the structures a bit
2348 more efficient. Neil tells me it isn't going to happen anytime
2350 if (IS_SX_BOARD(board
))
2351 port
->ch_base
= sx_read_module_word (board
, addr
+j
*2, mc_chan_pointer
);
2353 port
->ch_base
= addr
+ 0x100 + 0x300*j
;
2355 sx_dprintk (SX_DEBUG_PROBE
, " %x", port
->ch_base
);
2356 port
->line
= portno
++;
2359 sx_dprintk (SX_DEBUG_PROBE
, "\n");
2361 /* This has to be done earlier. */
2362 /* board->flags |= SX_BOARD_INITIALIZED; */
2369 static void __exit
sx_release_drivers(void)
2372 tty_unregister_driver(sx_driver
);
2373 put_tty_driver(sx_driver
);
2378 /********************************************************
2379 * Setting bit 17 in the CNTRL register of the PLX 9050 *
2380 * chip forces a retry on writes while a read is pending.*
2381 * This is to prevent the card locking up on Intel Xeon *
2382 * multiprocessor systems with the NX chipset. -- NV *
2383 ********************************************************/
2385 /* Newer cards are produced with this bit set from the configuration
2386 EEprom. As the bit is read/write for the CPU, we can fix it here,
2387 if we detect that it isn't set correctly. -- REW */
2389 static void fix_sx_pci (struct pci_dev
*pdev
, struct sx_board
*board
)
2391 unsigned int hwbase
;
2392 void __iomem
*rebase
;
2395 #define CNTRL_REG_OFFSET 0x50
2396 #define CNTRL_REG_GOODVALUE 0x18260000
2398 pci_read_config_dword(pdev
, PCI_BASE_ADDRESS_0
, &hwbase
);
2399 hwbase
&= PCI_BASE_ADDRESS_MEM_MASK
;
2400 rebase
= ioremap(hwbase
, 0x80);
2401 t
= readl (rebase
+ CNTRL_REG_OFFSET
);
2402 if (t
!= CNTRL_REG_GOODVALUE
) {
2403 printk (KERN_DEBUG
"sx: performing cntrl reg fix: %08x -> %08x\n", t
, CNTRL_REG_GOODVALUE
);
2404 writel (CNTRL_REG_GOODVALUE
, rebase
+ CNTRL_REG_OFFSET
);
2411 static int __init
sx_init(void)
2416 struct sx_board
*board
;
2419 struct pci_dev
*pdev
= NULL
;
2421 unsigned short tshort
;
2425 sx_dprintk (SX_DEBUG_INIT
, "Initing sx module... (sx_debug=%d)\n", sx_debug
);
2426 if (abs ((long) (&sx_debug
) - sx_debug
) < 0x10000) {
2427 printk (KERN_WARNING
"sx: sx_debug is an address, instead of a value. "
2429 printk ("(%p)\n", &sx_debug
);
2433 if (misc_register(&sx_fw_device
) < 0) {
2434 printk(KERN_ERR
"SX: Unable to register firmware loader driver.\n");
2439 while ((pdev
= pci_find_device (PCI_VENDOR_ID_SPECIALIX
,
2440 PCI_DEVICE_ID_SPECIALIX_SX_XIO_IO8
,
2442 if (pci_enable_device(pdev
))
2445 /* Specialix has a whole bunch of cards with
2446 0x2000 as the device ID. They say its because
2447 the standard requires it. Stupid standard. */
2448 /* It seems that reading a word doesn't work reliably on 2.0.
2449 Also, reading a non-aligned dword doesn't work. So we read the
2450 whole dword at 0x2c and extract the word at 0x2e (SUBSYSTEM_ID)
2452 /* I don't know why the define doesn't work, constant 0x2c does --REW */
2453 pci_read_config_dword (pdev
, 0x2c, &tint
);
2454 tshort
= (tint
>> 16) & 0xffff;
2455 sx_dprintk (SX_DEBUG_PROBE
, "Got a specialix card: %x.\n", tint
);
2456 /* sx_dprintk (SX_DEBUG_PROBE, "pdev = %d/%d (%x)\n", pdev, tint); */
2457 if ((tshort
!= 0x0200) && (tshort
!= 0x0300)) {
2458 sx_dprintk (SX_DEBUG_PROBE
, "But it's not an SX card (%d)...\n",
2462 board
= &boards
[found
];
2464 board
->flags
&= ~SX_BOARD_TYPE
;
2465 board
->flags
|= (tshort
== 0x200)?SX_PCI_BOARD
:
2468 /* CF boards use base address 3.... */
2469 if (IS_CF_BOARD (board
))
2470 board
->hw_base
= pci_resource_start (pdev
, 3);
2472 board
->hw_base
= pci_resource_start (pdev
, 2);
2474 board
->base
= ioremap(board
->hw_base
, WINDOW_LEN (board
));
2476 printk(KERN_ERR
"ioremap failed\n");
2477 /* XXX handle error */
2480 /* Most of the stuff on the CF board is offset by
2482 if (IS_CF_BOARD (board
)) board
->base
+= 0x18000;
2484 board
->irq
= pdev
->irq
;
2486 sx_dprintk (SX_DEBUG_PROBE
, "Got a specialix card: %x/%p(%d) %x.\n",
2487 tint
, boards
[found
].base
, board
->irq
, board
->flags
);
2489 if (probe_sx (board
)) {
2491 fix_sx_pci (pdev
, board
);
2493 iounmap(board
->base2
);
2497 for (i
=0;i
<NR_SX_ADDRS
;i
++) {
2498 board
= &boards
[found
];
2499 board
->hw_base
= sx_probe_addrs
[i
];
2501 board
->base
= ioremap(board
->hw_base
, SX_WINDOW_LEN
);
2502 board
->flags
&= ~SX_BOARD_TYPE
;
2503 board
->flags
|= SX_ISA_BOARD
;
2504 board
->irq
= sx_irqmask
?-1:0;
2506 if (probe_sx (board
)) {
2509 iounmap(board
->base
);
2513 for (i
=0;i
<NR_SI_ADDRS
;i
++) {
2514 board
= &boards
[found
];
2515 board
->hw_base
= si_probe_addrs
[i
];
2517 board
->base
= ioremap(board
->hw_base
, SI2_ISA_WINDOW_LEN
);
2518 board
->flags
&= ~SX_BOARD_TYPE
;
2519 board
->flags
|= SI_ISA_BOARD
;
2520 board
->irq
= sx_irqmask
?-1:0;
2522 if (probe_si (board
)) {
2525 iounmap (board
->base
);
2528 for (i
=0;i
<NR_SI1_ADDRS
;i
++) {
2529 board
= &boards
[found
];
2530 board
->hw_base
= si1_probe_addrs
[i
];
2532 board
->base
= ioremap(board
->hw_base
, SI1_ISA_WINDOW_LEN
);
2533 board
->flags
&= ~SX_BOARD_TYPE
;
2534 board
->flags
|= SI1_ISA_BOARD
;
2535 board
->irq
= sx_irqmask
?-1:0;
2537 if (probe_si (board
)) {
2540 iounmap (board
->base
);
2544 sx_dprintk(SX_DEBUG_PROBE
, "Probing for EISA cards\n");
2545 for(eisa_slot
=0x1000; eisa_slot
<0x10000; eisa_slot
+=0x1000)
2547 if((inb(eisa_slot
+0xc80)==0x4d) &&
2548 (inb(eisa_slot
+0xc81)==0x98))
2550 sx_dprintk(SX_DEBUG_PROBE
, "%s : Signature found in EISA slot %d, Product %d Rev %d\n",
2551 "XIO", (eisa_slot
>>12), inb(eisa_slot
+0xc82), inb(eisa_slot
+0xc83));
2553 board
= &boards
[found
];
2554 board
->eisa_base
= eisa_slot
;
2555 board
->flags
&= ~SX_BOARD_TYPE
;
2556 board
->flags
|= SI_EISA_BOARD
;
2558 board
->hw_base
= (((inb(0xc01+eisa_slot
) << 8) + inb(0xc00+eisa_slot
)) << 16);
2560 board
->base
= ioremap(board
->hw_base
, SI2_EISA_WINDOW_LEN
);
2562 sx_dprintk(SX_DEBUG_PROBE
, "IO hw_base address: %lx\n", board
->hw_base
);
2563 sx_dprintk(SX_DEBUG_PROBE
, "base: %p\n", board
->base
);
2564 board
->irq
= inb(board
->eisa_base
+0xc02)>>4;
2565 sx_dprintk(SX_DEBUG_PROBE
, "IRQ: %d\n", board
->irq
);
2573 printk (KERN_INFO
"sx: total of %d boards detected.\n", found
);
2575 misc_deregister(&sx_fw_device
);
2579 return found
?0:-EIO
;
2583 static void __exit
sx_exit (void)
2586 struct sx_board
*board
;
2589 for (i
= 0; i
< SX_NBOARDS
; i
++) {
2591 if (board
->flags
& SX_BOARD_INITIALIZED
) {
2592 sx_dprintk (SX_DEBUG_CLEANUP
, "Cleaning up board at %p\n", board
->base
);
2593 /* The board should stop messing with us.
2594 (actually I mean the interrupt) */
2596 if ((board
->irq
) && (board
->flags
& SX_IRQ_ALLOCATED
))
2597 free_irq (board
->irq
, board
);
2599 /* It is safe/allowed to del_timer a non-active timer */
2600 del_timer (& board
->timer
);
2601 iounmap(board
->base
);
2604 if (misc_deregister(&sx_fw_device
) < 0) {
2605 printk (KERN_INFO
"sx: couldn't deregister firmware loader devic\n");
2607 sx_dprintk (SX_DEBUG_CLEANUP
, "Cleaning up drivers (%d)\n", sx_initialized
);
2609 sx_release_drivers ();
2615 module_init(sx_init
);
2616 module_exit(sx_exit
);