blob: 2083454db511d7daf260eb8ceace3f2580cc47bc [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * Copyright (c) 1996 John Shifflett, GeoLog Consulting
3 * john@geolog.com
4 * jshiffle@netcom.com
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2, or (at your option)
9 * any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 */
16
17/*
18 * Drew Eckhardt's excellent 'Generic NCR5380' sources from Linux-PC
19 * provided much of the inspiration and some of the code for this
20 * driver. Everything I know about Amiga DMA was gleaned from careful
21 * reading of Hamish Mcdonald's original wd33c93 driver; in fact, I
22 * borrowed shamelessly from all over that source. Thanks Hamish!
23 *
24 * _This_ driver is (I feel) an improvement over the old one in
25 * several respects:
26 *
27 * - Target Disconnection/Reconnection is now supported. Any
28 * system with more than one device active on the SCSI bus
29 * will benefit from this. The driver defaults to what I
30 * call 'adaptive disconnect' - meaning that each command
31 * is evaluated individually as to whether or not it should
32 * be run with the option to disconnect/reselect (if the
33 * device chooses), or as a "SCSI-bus-hog".
34 *
35 * - Synchronous data transfers are now supported. Because of
36 * a few devices that choke after telling the driver that
37 * they can do sync transfers, we don't automatically use
38 * this faster protocol - it can be enabled via the command-
39 * line on a device-by-device basis.
40 *
41 * - Runtime operating parameters can now be specified through
42 * the 'amiboot' or the 'insmod' command line. For amiboot do:
43 * "amiboot [usual stuff] wd33c93=blah,blah,blah"
44 * The defaults should be good for most people. See the comment
45 * for 'setup_strings' below for more details.
46 *
47 * - The old driver relied exclusively on what the Western Digital
48 * docs call "Combination Level 2 Commands", which are a great
49 * idea in that the CPU is relieved of a lot of interrupt
50 * overhead. However, by accepting a certain (user-settable)
51 * amount of additional interrupts, this driver achieves
52 * better control over the SCSI bus, and data transfers are
53 * almost as fast while being much easier to define, track,
54 * and debug.
55 *
56 *
57 * TODO:
58 * more speed. linked commands.
59 *
60 *
61 * People with bug reports, wish-lists, complaints, comments,
62 * or improvements are asked to pah-leeez email me (John Shifflett)
63 * at john@geolog.com or jshiffle@netcom.com! I'm anxious to get
64 * this thing into as good a shape as possible, and I'm positive
65 * there are lots of lurking bugs and "Stupid Places".
66 *
67 * Updates:
68 *
69 * Added support for pre -A chips, which don't have advanced features
70 * and will generate CSR_RESEL rather than CSR_RESEL_AM.
71 * Richard Hirst <richard@sleepie.demon.co.uk> August 2000
72 */
73
Linus Torvalds1da177e2005-04-16 15:20:36 -070074#include <linux/module.h>
75
76#include <linux/sched.h>
77#include <linux/string.h>
78#include <linux/delay.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070079#include <linux/init.h>
Ralf Baechlecf7f5b42006-03-03 16:34:08 +000080#include <linux/interrupt.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070081#include <linux/blkdev.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070082
83#include <scsi/scsi.h>
84#include <scsi/scsi_cmnd.h>
85#include <scsi/scsi_device.h>
86#include <scsi/scsi_host.h>
87
88#include "wd33c93.h"
89
90
91#define WD33C93_VERSION "1.26"
92#define WD33C93_DATE "22/Feb/2003"
93
94MODULE_AUTHOR("John Shifflett");
95MODULE_DESCRIPTION("Generic WD33C93 SCSI driver");
96MODULE_LICENSE("GPL");
97
98/*
99 * 'setup_strings' is a single string used to pass operating parameters and
100 * settings from the kernel/module command-line to the driver. 'setup_args[]'
101 * is an array of strings that define the compile-time default values for
102 * these settings. If Linux boots with an amiboot or insmod command-line,
103 * those settings are combined with 'setup_args[]'. Note that amiboot
104 * command-lines are prefixed with "wd33c93=" while insmod uses a
105 * "setup_strings=" prefix. The driver recognizes the following keywords
106 * (lower case required) and arguments:
107 *
108 * - nosync:bitmask -bitmask is a byte where the 1st 7 bits correspond with
109 * the 7 possible SCSI devices. Set a bit to negotiate for
110 * asynchronous transfers on that device. To maintain
111 * backwards compatibility, a command-line such as
112 * "wd33c93=255" will be automatically translated to
113 * "wd33c93=nosync:0xff".
114 * - nodma:x -x = 1 to disable DMA, x = 0 to enable it. Argument is
115 * optional - if not present, same as "nodma:1".
116 * - period:ns -ns is the minimum # of nanoseconds in a SCSI data transfer
117 * period. Default is 500; acceptable values are 250 - 1000.
118 * - disconnect:x -x = 0 to never allow disconnects, 2 to always allow them.
119 * x = 1 does 'adaptive' disconnects, which is the default
120 * and generally the best choice.
121 * - debug:x -If 'DEBUGGING_ON' is defined, x is a bit mask that causes
122 * various types of debug output to printed - see the DB_xxx
123 * defines in wd33c93.h
124 * - clock:x -x = clock input in MHz for WD33c93 chip. Normal values
125 * would be from 8 through 20. Default is 8.
126 * - next -No argument. Used to separate blocks of keywords when
127 * there's more than one host adapter in the system.
128 *
129 * Syntax Notes:
130 * - Numeric arguments can be decimal or the '0x' form of hex notation. There
131 * _must_ be a colon between a keyword and its numeric argument, with no
132 * spaces.
133 * - Keywords are separated by commas, no spaces, in the standard kernel
134 * command-line manner.
135 * - A keyword in the 'nth' comma-separated command-line member will overwrite
136 * the 'nth' element of setup_args[]. A blank command-line member (in
137 * other words, a comma with no preceding keyword) will _not_ overwrite
138 * the corresponding setup_args[] element.
139 * - If a keyword is used more than once, the first one applies to the first
140 * SCSI host found, the second to the second card, etc, unless the 'next'
141 * keyword is used to change the order.
142 *
143 * Some amiboot examples (for insmod, use 'setup_strings' instead of 'wd33c93'):
144 * - wd33c93=nosync:255
145 * - wd33c93=nodma
146 * - wd33c93=nodma:1
147 * - wd33c93=disconnect:2,nosync:0x08,period:250
148 * - wd33c93=debug:0x1c
149 */
150
151/* Normally, no defaults are specified */
152static char *setup_args[] = { "", "", "", "", "", "", "", "", "" };
153
154static char *setup_strings;
155module_param(setup_strings, charp, 0);
156
157static void wd33c93_execute(struct Scsi_Host *instance);
158
159#ifdef CONFIG_WD33C93_PIO
160static inline uchar
161read_wd33c93(const wd33c93_regs regs, uchar reg_num)
162{
163 uchar data;
164
165 outb(reg_num, regs.SASR);
166 data = inb(regs.SCMD);
167 return data;
168}
169
170static inline unsigned long
171read_wd33c93_count(const wd33c93_regs regs)
172{
173 unsigned long value;
174
175 outb(WD_TRANSFER_COUNT_MSB, regs.SASR);
176 value = inb(regs.SCMD) << 16;
177 value |= inb(regs.SCMD) << 8;
178 value |= inb(regs.SCMD);
179 return value;
180}
181
182static inline uchar
183read_aux_stat(const wd33c93_regs regs)
184{
185 return inb(regs.SASR);
186}
187
188static inline void
189write_wd33c93(const wd33c93_regs regs, uchar reg_num, uchar value)
190{
191 outb(reg_num, regs.SASR);
192 outb(value, regs.SCMD);
193}
194
195static inline void
196write_wd33c93_count(const wd33c93_regs regs, unsigned long value)
197{
198 outb(WD_TRANSFER_COUNT_MSB, regs.SASR);
199 outb((value >> 16) & 0xff, regs.SCMD);
200 outb((value >> 8) & 0xff, regs.SCMD);
201 outb( value & 0xff, regs.SCMD);
202}
203
204#define write_wd33c93_cmd(regs, cmd) \
205 write_wd33c93((regs), WD_COMMAND, (cmd))
206
207static inline void
208write_wd33c93_cdb(const wd33c93_regs regs, uint len, uchar cmnd[])
209{
210 int i;
211
212 outb(WD_CDB_1, regs.SASR);
213 for (i=0; i<len; i++)
214 outb(cmnd[i], regs.SCMD);
215}
216
217#else /* CONFIG_WD33C93_PIO */
218static inline uchar
219read_wd33c93(const wd33c93_regs regs, uchar reg_num)
220{
221 *regs.SASR = reg_num;
222 mb();
223 return (*regs.SCMD);
224}
225
226static unsigned long
227read_wd33c93_count(const wd33c93_regs regs)
228{
229 unsigned long value;
230
231 *regs.SASR = WD_TRANSFER_COUNT_MSB;
232 mb();
233 value = *regs.SCMD << 16;
234 value |= *regs.SCMD << 8;
235 value |= *regs.SCMD;
236 mb();
237 return value;
238}
239
240static inline uchar
241read_aux_stat(const wd33c93_regs regs)
242{
243 return *regs.SASR;
244}
245
246static inline void
247write_wd33c93(const wd33c93_regs regs, uchar reg_num, uchar value)
248{
249 *regs.SASR = reg_num;
250 mb();
251 *regs.SCMD = value;
252 mb();
253}
254
255static void
256write_wd33c93_count(const wd33c93_regs regs, unsigned long value)
257{
258 *regs.SASR = WD_TRANSFER_COUNT_MSB;
259 mb();
260 *regs.SCMD = value >> 16;
261 *regs.SCMD = value >> 8;
262 *regs.SCMD = value;
263 mb();
264}
265
266static inline void
267write_wd33c93_cmd(const wd33c93_regs regs, uchar cmd)
268{
269 *regs.SASR = WD_COMMAND;
270 mb();
271 *regs.SCMD = cmd;
272 mb();
273}
274
275static inline void
276write_wd33c93_cdb(const wd33c93_regs regs, uint len, uchar cmnd[])
277{
278 int i;
279
280 *regs.SASR = WD_CDB_1;
281 for (i = 0; i < len; i++)
282 *regs.SCMD = cmnd[i];
283}
284#endif /* CONFIG_WD33C93_PIO */
285
286static inline uchar
287read_1_byte(const wd33c93_regs regs)
288{
289 uchar asr;
290 uchar x = 0;
291
292 write_wd33c93(regs, WD_CONTROL, CTRL_IDI | CTRL_EDI | CTRL_POLLED);
293 write_wd33c93_cmd(regs, WD_CMD_TRANS_INFO | 0x80);
294 do {
295 asr = read_aux_stat(regs);
296 if (asr & ASR_DBR)
297 x = read_wd33c93(regs, WD_DATA);
298 } while (!(asr & ASR_INT));
299 return x;
300}
301
302static struct sx_period sx_table[] = {
303 {1, 0x20},
304 {252, 0x20},
305 {376, 0x30},
306 {500, 0x40},
307 {624, 0x50},
308 {752, 0x60},
309 {876, 0x70},
310 {1000, 0x00},
311 {0, 0}
312};
313
314static int
315round_period(unsigned int period)
316{
317 int x;
318
319 for (x = 1; sx_table[x].period_ns; x++) {
320 if ((period <= sx_table[x - 0].period_ns) &&
321 (period > sx_table[x - 1].period_ns)) {
322 return x;
323 }
324 }
325 return 7;
326}
327
328static uchar
329calc_sync_xfer(unsigned int period, unsigned int offset)
330{
331 uchar result;
332
333 period *= 4; /* convert SDTR code to ns */
334 result = sx_table[round_period(period)].reg_value;
335 result |= (offset < OPTIMUM_SX_OFF) ? offset : OPTIMUM_SX_OFF;
336 return result;
337}
338
339int
340wd33c93_queuecommand(struct scsi_cmnd *cmd,
341 void (*done)(struct scsi_cmnd *))
342{
343 struct WD33C93_hostdata *hostdata;
344 struct scsi_cmnd *tmp;
345
346 hostdata = (struct WD33C93_hostdata *) cmd->device->host->hostdata;
347
348 DB(DB_QUEUE_COMMAND,
349 printk("Q-%d-%02x-%ld( ", cmd->device->id, cmd->cmnd[0], cmd->pid))
350
351/* Set up a few fields in the scsi_cmnd structure for our own use:
352 * - host_scribble is the pointer to the next cmd in the input queue
353 * - scsi_done points to the routine we call when a cmd is finished
354 * - result is what you'd expect
355 */
356 cmd->host_scribble = NULL;
357 cmd->scsi_done = done;
358 cmd->result = 0;
359
360/* We use the Scsi_Pointer structure that's included with each command
361 * as a scratchpad (as it's intended to be used!). The handy thing about
362 * the SCp.xxx fields is that they're always associated with a given
363 * cmd, and are preserved across disconnect-reselect. This means we
364 * can pretty much ignore SAVE_POINTERS and RESTORE_POINTERS messages
365 * if we keep all the critical pointers and counters in SCp:
366 * - SCp.ptr is the pointer into the RAM buffer
367 * - SCp.this_residual is the size of that buffer
368 * - SCp.buffer points to the current scatter-gather buffer
369 * - SCp.buffers_residual tells us how many S.G. buffers there are
370 * - SCp.have_data_in is not used
371 * - SCp.sent_command is not used
372 * - SCp.phase records this command's SRCID_ER bit setting
373 */
374
375 if (cmd->use_sg) {
Christoph Hellwig79bd3f82006-07-14 10:29:34 +0200376 cmd->SCp.buffer = (struct scatterlist *) cmd->request_buffer;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700377 cmd->SCp.buffers_residual = cmd->use_sg - 1;
378 cmd->SCp.ptr = page_address(cmd->SCp.buffer->page) +
379 cmd->SCp.buffer->offset;
380 cmd->SCp.this_residual = cmd->SCp.buffer->length;
381 } else {
382 cmd->SCp.buffer = NULL;
383 cmd->SCp.buffers_residual = 0;
384 cmd->SCp.ptr = (char *) cmd->request_buffer;
385 cmd->SCp.this_residual = cmd->request_bufflen;
386 }
387
388/* WD docs state that at the conclusion of a "LEVEL2" command, the
389 * status byte can be retrieved from the LUN register. Apparently,
390 * this is the case only for *uninterrupted* LEVEL2 commands! If
391 * there are any unexpected phases entered, even if they are 100%
392 * legal (different devices may choose to do things differently),
393 * the LEVEL2 command sequence is exited. This often occurs prior
394 * to receiving the status byte, in which case the driver does a
395 * status phase interrupt and gets the status byte on its own.
396 * While such a command can then be "resumed" (ie restarted to
397 * finish up as a LEVEL2 command), the LUN register will NOT be
398 * a valid status byte at the command's conclusion, and we must
399 * use the byte obtained during the earlier interrupt. Here, we
400 * preset SCp.Status to an illegal value (0xff) so that when
401 * this command finally completes, we can tell where the actual
402 * status byte is stored.
403 */
404
405 cmd->SCp.Status = ILLEGAL_STATUS_BYTE;
406
407 /*
408 * Add the cmd to the end of 'input_Q'. Note that REQUEST SENSE
409 * commands are added to the head of the queue so that the desired
410 * sense data is not lost before REQUEST_SENSE executes.
411 */
412
413 spin_lock_irq(&hostdata->lock);
414
415 if (!(hostdata->input_Q) || (cmd->cmnd[0] == REQUEST_SENSE)) {
416 cmd->host_scribble = (uchar *) hostdata->input_Q;
417 hostdata->input_Q = cmd;
418 } else { /* find the end of the queue */
419 for (tmp = (struct scsi_cmnd *) hostdata->input_Q;
420 tmp->host_scribble;
421 tmp = (struct scsi_cmnd *) tmp->host_scribble) ;
422 tmp->host_scribble = (uchar *) cmd;
423 }
424
425/* We know that there's at least one command in 'input_Q' now.
426 * Go see if any of them are runnable!
427 */
428
429 wd33c93_execute(cmd->device->host);
430
431 DB(DB_QUEUE_COMMAND, printk(")Q-%ld ", cmd->pid))
432
433 spin_unlock_irq(&hostdata->lock);
434 return 0;
435}
436
437/*
438 * This routine attempts to start a scsi command. If the host_card is
439 * already connected, we give up immediately. Otherwise, look through
440 * the input_Q, using the first command we find that's intended
441 * for a currently non-busy target/lun.
442 *
443 * wd33c93_execute() is always called with interrupts disabled or from
444 * the wd33c93_intr itself, which means that a wd33c93 interrupt
445 * cannot occur while we are in here.
446 */
447static void
448wd33c93_execute(struct Scsi_Host *instance)
449{
450 struct WD33C93_hostdata *hostdata =
451 (struct WD33C93_hostdata *) instance->hostdata;
452 const wd33c93_regs regs = hostdata->regs;
453 struct scsi_cmnd *cmd, *prev;
454
455 DB(DB_EXECUTE, printk("EX("))
456 if (hostdata->selecting || hostdata->connected) {
457 DB(DB_EXECUTE, printk(")EX-0 "))
458 return;
459 }
460
461 /*
462 * Search through the input_Q for a command destined
463 * for an idle target/lun.
464 */
465
466 cmd = (struct scsi_cmnd *) hostdata->input_Q;
Al Viroa5d361f2006-01-12 01:06:34 -0800467 prev = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700468 while (cmd) {
469 if (!(hostdata->busy[cmd->device->id] & (1 << cmd->device->lun)))
470 break;
471 prev = cmd;
472 cmd = (struct scsi_cmnd *) cmd->host_scribble;
473 }
474
475 /* quit if queue empty or all possible targets are busy */
476
477 if (!cmd) {
478 DB(DB_EXECUTE, printk(")EX-1 "))
479 return;
480 }
481
482 /* remove command from queue */
483
484 if (prev)
485 prev->host_scribble = cmd->host_scribble;
486 else
487 hostdata->input_Q = (struct scsi_cmnd *) cmd->host_scribble;
488
489#ifdef PROC_STATISTICS
490 hostdata->cmd_cnt[cmd->device->id]++;
491#endif
492
493 /*
494 * Start the selection process
495 */
496
497 if (cmd->sc_data_direction == DMA_TO_DEVICE)
498 write_wd33c93(regs, WD_DESTINATION_ID, cmd->device->id);
499 else
500 write_wd33c93(regs, WD_DESTINATION_ID, cmd->device->id | DSTID_DPD);
501
502/* Now we need to figure out whether or not this command is a good
503 * candidate for disconnect/reselect. We guess to the best of our
504 * ability, based on a set of hierarchical rules. When several
505 * devices are operating simultaneously, disconnects are usually
506 * an advantage. In a single device system, or if only 1 device
507 * is being accessed, transfers usually go faster if disconnects
508 * are not allowed:
509 *
510 * + Commands should NEVER disconnect if hostdata->disconnect =
511 * DIS_NEVER (this holds for tape drives also), and ALWAYS
512 * disconnect if hostdata->disconnect = DIS_ALWAYS.
513 * + Tape drive commands should always be allowed to disconnect.
514 * + Disconnect should be allowed if disconnected_Q isn't empty.
515 * + Commands should NOT disconnect if input_Q is empty.
516 * + Disconnect should be allowed if there are commands in input_Q
517 * for a different target/lun. In this case, the other commands
518 * should be made disconnect-able, if not already.
519 *
520 * I know, I know - this code would flunk me out of any
521 * "C Programming 101" class ever offered. But it's easy
522 * to change around and experiment with for now.
523 */
524
525 cmd->SCp.phase = 0; /* assume no disconnect */
526 if (hostdata->disconnect == DIS_NEVER)
527 goto no;
528 if (hostdata->disconnect == DIS_ALWAYS)
529 goto yes;
530 if (cmd->device->type == 1) /* tape drive? */
531 goto yes;
532 if (hostdata->disconnected_Q) /* other commands disconnected? */
533 goto yes;
534 if (!(hostdata->input_Q)) /* input_Q empty? */
535 goto no;
536 for (prev = (struct scsi_cmnd *) hostdata->input_Q; prev;
537 prev = (struct scsi_cmnd *) prev->host_scribble) {
538 if ((prev->device->id != cmd->device->id) ||
539 (prev->device->lun != cmd->device->lun)) {
540 for (prev = (struct scsi_cmnd *) hostdata->input_Q; prev;
541 prev = (struct scsi_cmnd *) prev->host_scribble)
542 prev->SCp.phase = 1;
543 goto yes;
544 }
545 }
546
547 goto no;
548
549 yes:
550 cmd->SCp.phase = 1;
551
552#ifdef PROC_STATISTICS
553 hostdata->disc_allowed_cnt[cmd->device->id]++;
554#endif
555
556 no:
557
558 write_wd33c93(regs, WD_SOURCE_ID, ((cmd->SCp.phase) ? SRCID_ER : 0));
559
560 write_wd33c93(regs, WD_TARGET_LUN, cmd->device->lun);
561 write_wd33c93(regs, WD_SYNCHRONOUS_TRANSFER,
562 hostdata->sync_xfer[cmd->device->id]);
563 hostdata->busy[cmd->device->id] |= (1 << cmd->device->lun);
564
565 if ((hostdata->level2 == L2_NONE) ||
566 (hostdata->sync_stat[cmd->device->id] == SS_UNSET)) {
567
568 /*
569 * Do a 'Select-With-ATN' command. This will end with
570 * one of the following interrupts:
571 * CSR_RESEL_AM: failure - can try again later.
572 * CSR_TIMEOUT: failure - give up.
573 * CSR_SELECT: success - proceed.
574 */
575
576 hostdata->selecting = cmd;
577
578/* Every target has its own synchronous transfer setting, kept in the
579 * sync_xfer array, and a corresponding status byte in sync_stat[].
580 * Each target's sync_stat[] entry is initialized to SX_UNSET, and its
581 * sync_xfer[] entry is initialized to the default/safe value. SS_UNSET
582 * means that the parameters are undetermined as yet, and that we
583 * need to send an SDTR message to this device after selection is
584 * complete: We set SS_FIRST to tell the interrupt routine to do so.
585 * If we've been asked not to try synchronous transfers on this
586 * target (and _all_ luns within it), we'll still send the SDTR message
587 * later, but at that time we'll negotiate for async by specifying a
588 * sync fifo depth of 0.
589 */
590 if (hostdata->sync_stat[cmd->device->id] == SS_UNSET)
591 hostdata->sync_stat[cmd->device->id] = SS_FIRST;
592 hostdata->state = S_SELECTING;
593 write_wd33c93_count(regs, 0); /* guarantee a DATA_PHASE interrupt */
594 write_wd33c93_cmd(regs, WD_CMD_SEL_ATN);
595 } else {
596
597 /*
598 * Do a 'Select-With-ATN-Xfer' command. This will end with
599 * one of the following interrupts:
600 * CSR_RESEL_AM: failure - can try again later.
601 * CSR_TIMEOUT: failure - give up.
602 * anything else: success - proceed.
603 */
604
605 hostdata->connected = cmd;
606 write_wd33c93(regs, WD_COMMAND_PHASE, 0);
607
608 /* copy command_descriptor_block into WD chip
609 * (take advantage of auto-incrementing)
610 */
611
612 write_wd33c93_cdb(regs, cmd->cmd_len, cmd->cmnd);
613
614 /* The wd33c93 only knows about Group 0, 1, and 5 commands when
615 * it's doing a 'select-and-transfer'. To be safe, we write the
616 * size of the CDB into the OWN_ID register for every case. This
617 * way there won't be problems with vendor-unique, audio, etc.
618 */
619
620 write_wd33c93(regs, WD_OWN_ID, cmd->cmd_len);
621
622 /* When doing a non-disconnect command with DMA, we can save
623 * ourselves a DATA phase interrupt later by setting everything
624 * up ahead of time.
625 */
626
627 if ((cmd->SCp.phase == 0) && (hostdata->no_dma == 0)) {
628 if (hostdata->dma_setup(cmd,
629 (cmd->sc_data_direction == DMA_TO_DEVICE) ?
630 DATA_OUT_DIR : DATA_IN_DIR))
631 write_wd33c93_count(regs, 0); /* guarantee a DATA_PHASE interrupt */
632 else {
633 write_wd33c93_count(regs,
634 cmd->SCp.this_residual);
635 write_wd33c93(regs, WD_CONTROL,
636 CTRL_IDI | CTRL_EDI | CTRL_DMA);
637 hostdata->dma = D_DMA_RUNNING;
638 }
639 } else
640 write_wd33c93_count(regs, 0); /* guarantee a DATA_PHASE interrupt */
641
642 hostdata->state = S_RUNNING_LEVEL2;
643 write_wd33c93_cmd(regs, WD_CMD_SEL_ATN_XFER);
644 }
645
646 /*
647 * Since the SCSI bus can handle only 1 connection at a time,
648 * we get out of here now. If the selection fails, or when
649 * the command disconnects, we'll come back to this routine
650 * to search the input_Q again...
651 */
652
653 DB(DB_EXECUTE,
654 printk("%s%ld)EX-2 ", (cmd->SCp.phase) ? "d:" : "", cmd->pid))
655}
656
657static void
658transfer_pio(const wd33c93_regs regs, uchar * buf, int cnt,
659 int data_in_dir, struct WD33C93_hostdata *hostdata)
660{
661 uchar asr;
662
663 DB(DB_TRANSFER,
664 printk("(%p,%d,%s:", buf, cnt, data_in_dir ? "in" : "out"))
665
666 write_wd33c93(regs, WD_CONTROL, CTRL_IDI | CTRL_EDI | CTRL_POLLED);
667 write_wd33c93_count(regs, cnt);
668 write_wd33c93_cmd(regs, WD_CMD_TRANS_INFO);
669 if (data_in_dir) {
670 do {
671 asr = read_aux_stat(regs);
672 if (asr & ASR_DBR)
673 *buf++ = read_wd33c93(regs, WD_DATA);
674 } while (!(asr & ASR_INT));
675 } else {
676 do {
677 asr = read_aux_stat(regs);
678 if (asr & ASR_DBR)
679 write_wd33c93(regs, WD_DATA, *buf++);
680 } while (!(asr & ASR_INT));
681 }
682
683 /* Note: we are returning with the interrupt UN-cleared.
684 * Since (presumably) an entire I/O operation has
685 * completed, the bus phase is probably different, and
686 * the interrupt routine will discover this when it
687 * responds to the uncleared int.
688 */
689
690}
691
692static void
693transfer_bytes(const wd33c93_regs regs, struct scsi_cmnd *cmd,
694 int data_in_dir)
695{
696 struct WD33C93_hostdata *hostdata;
697 unsigned long length;
698
699 hostdata = (struct WD33C93_hostdata *) cmd->device->host->hostdata;
700
701/* Normally, you'd expect 'this_residual' to be non-zero here.
702 * In a series of scatter-gather transfers, however, this
703 * routine will usually be called with 'this_residual' equal
704 * to 0 and 'buffers_residual' non-zero. This means that a
705 * previous transfer completed, clearing 'this_residual', and
706 * now we need to setup the next scatter-gather buffer as the
707 * source or destination for THIS transfer.
708 */
709 if (!cmd->SCp.this_residual && cmd->SCp.buffers_residual) {
710 ++cmd->SCp.buffer;
711 --cmd->SCp.buffers_residual;
712 cmd->SCp.this_residual = cmd->SCp.buffer->length;
713 cmd->SCp.ptr = page_address(cmd->SCp.buffer->page) +
714 cmd->SCp.buffer->offset;
715 }
716
717 write_wd33c93(regs, WD_SYNCHRONOUS_TRANSFER,
718 hostdata->sync_xfer[cmd->device->id]);
719
720/* 'hostdata->no_dma' is TRUE if we don't even want to try DMA.
721 * Update 'this_residual' and 'ptr' after 'transfer_pio()' returns.
722 */
723
724 if (hostdata->no_dma || hostdata->dma_setup(cmd, data_in_dir)) {
725#ifdef PROC_STATISTICS
726 hostdata->pio_cnt++;
727#endif
728 transfer_pio(regs, (uchar *) cmd->SCp.ptr,
729 cmd->SCp.this_residual, data_in_dir, hostdata);
730 length = cmd->SCp.this_residual;
731 cmd->SCp.this_residual = read_wd33c93_count(regs);
732 cmd->SCp.ptr += (length - cmd->SCp.this_residual);
733 }
734
735/* We are able to do DMA (in fact, the Amiga hardware is
736 * already going!), so start up the wd33c93 in DMA mode.
737 * We set 'hostdata->dma' = D_DMA_RUNNING so that when the
738 * transfer completes and causes an interrupt, we're
739 * reminded to tell the Amiga to shut down its end. We'll
740 * postpone the updating of 'this_residual' and 'ptr'
741 * until then.
742 */
743
744 else {
745#ifdef PROC_STATISTICS
746 hostdata->dma_cnt++;
747#endif
748 write_wd33c93(regs, WD_CONTROL, CTRL_IDI | CTRL_EDI | CTRL_DMA);
749 write_wd33c93_count(regs, cmd->SCp.this_residual);
750
751 if ((hostdata->level2 >= L2_DATA) ||
752 (hostdata->level2 == L2_BASIC && cmd->SCp.phase == 0)) {
753 write_wd33c93(regs, WD_COMMAND_PHASE, 0x45);
754 write_wd33c93_cmd(regs, WD_CMD_SEL_ATN_XFER);
755 hostdata->state = S_RUNNING_LEVEL2;
756 } else
757 write_wd33c93_cmd(regs, WD_CMD_TRANS_INFO);
758
759 hostdata->dma = D_DMA_RUNNING;
760 }
761}
762
763void
764wd33c93_intr(struct Scsi_Host *instance)
765{
766 struct WD33C93_hostdata *hostdata =
767 (struct WD33C93_hostdata *) instance->hostdata;
768 const wd33c93_regs regs = hostdata->regs;
769 struct scsi_cmnd *patch, *cmd;
770 uchar asr, sr, phs, id, lun, *ucp, msg;
771 unsigned long length, flags;
772
773 asr = read_aux_stat(regs);
774 if (!(asr & ASR_INT) || (asr & ASR_BSY))
775 return;
776
777 spin_lock_irqsave(&hostdata->lock, flags);
778
779#ifdef PROC_STATISTICS
780 hostdata->int_cnt++;
781#endif
782
783 cmd = (struct scsi_cmnd *) hostdata->connected; /* assume we're connected */
784 sr = read_wd33c93(regs, WD_SCSI_STATUS); /* clear the interrupt */
785 phs = read_wd33c93(regs, WD_COMMAND_PHASE);
786
787 DB(DB_INTR, printk("{%02x:%02x-", asr, sr))
788
789/* After starting a DMA transfer, the next interrupt
790 * is guaranteed to be in response to completion of
791 * the transfer. Since the Amiga DMA hardware runs in
792 * in an open-ended fashion, it needs to be told when
793 * to stop; do that here if D_DMA_RUNNING is true.
794 * Also, we have to update 'this_residual' and 'ptr'
795 * based on the contents of the TRANSFER_COUNT register,
796 * in case the device decided to do an intermediate
797 * disconnect (a device may do this if it has to do a
798 * seek, or just to be nice and let other devices have
799 * some bus time during long transfers). After doing
800 * whatever is needed, we go on and service the WD3393
801 * interrupt normally.
802 */
803 if (hostdata->dma == D_DMA_RUNNING) {
804 DB(DB_TRANSFER,
805 printk("[%p/%d:", cmd->SCp.ptr, cmd->SCp.this_residual))
806 hostdata->dma_stop(cmd->device->host, cmd, 1);
807 hostdata->dma = D_DMA_OFF;
808 length = cmd->SCp.this_residual;
809 cmd->SCp.this_residual = read_wd33c93_count(regs);
810 cmd->SCp.ptr += (length - cmd->SCp.this_residual);
811 DB(DB_TRANSFER,
812 printk("%p/%d]", cmd->SCp.ptr, cmd->SCp.this_residual))
813 }
814
815/* Respond to the specific WD3393 interrupt - there are quite a few! */
816 switch (sr) {
817 case CSR_TIMEOUT:
818 DB(DB_INTR, printk("TIMEOUT"))
819
820 if (hostdata->state == S_RUNNING_LEVEL2)
821 hostdata->connected = NULL;
822 else {
823 cmd = (struct scsi_cmnd *) hostdata->selecting; /* get a valid cmd */
824 hostdata->selecting = NULL;
825 }
826
827 cmd->result = DID_NO_CONNECT << 16;
828 hostdata->busy[cmd->device->id] &= ~(1 << cmd->device->lun);
829 hostdata->state = S_UNCONNECTED;
830 cmd->scsi_done(cmd);
831
832 /* From esp.c:
833 * There is a window of time within the scsi_done() path
834 * of execution where interrupts are turned back on full
835 * blast and left that way. During that time we could
836 * reconnect to a disconnected command, then we'd bomb
837 * out below. We could also end up executing two commands
838 * at _once_. ...just so you know why the restore_flags()
839 * is here...
840 */
841
842 spin_unlock_irqrestore(&hostdata->lock, flags);
843
844/* We are not connected to a target - check to see if there
845 * are commands waiting to be executed.
846 */
847
848 wd33c93_execute(instance);
849 break;
850
851/* Note: this interrupt should not occur in a LEVEL2 command */
852
853 case CSR_SELECT:
854 DB(DB_INTR, printk("SELECT"))
855 hostdata->connected = cmd =
856 (struct scsi_cmnd *) hostdata->selecting;
857 hostdata->selecting = NULL;
858
859 /* construct an IDENTIFY message with correct disconnect bit */
860
861 hostdata->outgoing_msg[0] = (0x80 | 0x00 | cmd->device->lun);
862 if (cmd->SCp.phase)
863 hostdata->outgoing_msg[0] |= 0x40;
864
865 if (hostdata->sync_stat[cmd->device->id] == SS_FIRST) {
866#ifdef SYNC_DEBUG
867 printk(" sending SDTR ");
868#endif
869
870 hostdata->sync_stat[cmd->device->id] = SS_WAITING;
871
872/* Tack on a 2nd message to ask about synchronous transfers. If we've
873 * been asked to do only asynchronous transfers on this device, we
874 * request a fifo depth of 0, which is equivalent to async - should
875 * solve the problems some people have had with GVP's Guru ROM.
876 */
877
878 hostdata->outgoing_msg[1] = EXTENDED_MESSAGE;
879 hostdata->outgoing_msg[2] = 3;
880 hostdata->outgoing_msg[3] = EXTENDED_SDTR;
881 if (hostdata->no_sync & (1 << cmd->device->id)) {
882 hostdata->outgoing_msg[4] =
883 hostdata->default_sx_per / 4;
884 hostdata->outgoing_msg[5] = 0;
885 } else {
886 hostdata->outgoing_msg[4] = OPTIMUM_SX_PER / 4;
887 hostdata->outgoing_msg[5] = OPTIMUM_SX_OFF;
888 }
889 hostdata->outgoing_len = 6;
890 } else
891 hostdata->outgoing_len = 1;
892
893 hostdata->state = S_CONNECTED;
894 spin_unlock_irqrestore(&hostdata->lock, flags);
895 break;
896
897 case CSR_XFER_DONE | PHS_DATA_IN:
898 case CSR_UNEXP | PHS_DATA_IN:
899 case CSR_SRV_REQ | PHS_DATA_IN:
900 DB(DB_INTR,
901 printk("IN-%d.%d", cmd->SCp.this_residual,
902 cmd->SCp.buffers_residual))
903 transfer_bytes(regs, cmd, DATA_IN_DIR);
904 if (hostdata->state != S_RUNNING_LEVEL2)
905 hostdata->state = S_CONNECTED;
906 spin_unlock_irqrestore(&hostdata->lock, flags);
907 break;
908
909 case CSR_XFER_DONE | PHS_DATA_OUT:
910 case CSR_UNEXP | PHS_DATA_OUT:
911 case CSR_SRV_REQ | PHS_DATA_OUT:
912 DB(DB_INTR,
913 printk("OUT-%d.%d", cmd->SCp.this_residual,
914 cmd->SCp.buffers_residual))
915 transfer_bytes(regs, cmd, DATA_OUT_DIR);
916 if (hostdata->state != S_RUNNING_LEVEL2)
917 hostdata->state = S_CONNECTED;
918 spin_unlock_irqrestore(&hostdata->lock, flags);
919 break;
920
921/* Note: this interrupt should not occur in a LEVEL2 command */
922
923 case CSR_XFER_DONE | PHS_COMMAND:
924 case CSR_UNEXP | PHS_COMMAND:
925 case CSR_SRV_REQ | PHS_COMMAND:
926 DB(DB_INTR, printk("CMND-%02x,%ld", cmd->cmnd[0], cmd->pid))
927 transfer_pio(regs, cmd->cmnd, cmd->cmd_len, DATA_OUT_DIR,
928 hostdata);
929 hostdata->state = S_CONNECTED;
930 spin_unlock_irqrestore(&hostdata->lock, flags);
931 break;
932
933 case CSR_XFER_DONE | PHS_STATUS:
934 case CSR_UNEXP | PHS_STATUS:
935 case CSR_SRV_REQ | PHS_STATUS:
936 DB(DB_INTR, printk("STATUS="))
937 cmd->SCp.Status = read_1_byte(regs);
938 DB(DB_INTR, printk("%02x", cmd->SCp.Status))
939 if (hostdata->level2 >= L2_BASIC) {
940 sr = read_wd33c93(regs, WD_SCSI_STATUS); /* clear interrupt */
Roman Zippel882905c2006-06-23 02:04:57 -0700941 udelay(7);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700942 hostdata->state = S_RUNNING_LEVEL2;
943 write_wd33c93(regs, WD_COMMAND_PHASE, 0x50);
944 write_wd33c93_cmd(regs, WD_CMD_SEL_ATN_XFER);
945 } else {
946 hostdata->state = S_CONNECTED;
947 }
948 spin_unlock_irqrestore(&hostdata->lock, flags);
949 break;
950
951 case CSR_XFER_DONE | PHS_MESS_IN:
952 case CSR_UNEXP | PHS_MESS_IN:
953 case CSR_SRV_REQ | PHS_MESS_IN:
954 DB(DB_INTR, printk("MSG_IN="))
955
956 msg = read_1_byte(regs);
957 sr = read_wd33c93(regs, WD_SCSI_STATUS); /* clear interrupt */
Roman Zippel882905c2006-06-23 02:04:57 -0700958 udelay(7);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700959
960 hostdata->incoming_msg[hostdata->incoming_ptr] = msg;
961 if (hostdata->incoming_msg[0] == EXTENDED_MESSAGE)
962 msg = EXTENDED_MESSAGE;
963 else
964 hostdata->incoming_ptr = 0;
965
966 cmd->SCp.Message = msg;
967 switch (msg) {
968
969 case COMMAND_COMPLETE:
970 DB(DB_INTR, printk("CCMP-%ld", cmd->pid))
971 write_wd33c93_cmd(regs, WD_CMD_NEGATE_ACK);
972 hostdata->state = S_PRE_CMP_DISC;
973 break;
974
975 case SAVE_POINTERS:
976 DB(DB_INTR, printk("SDP"))
977 write_wd33c93_cmd(regs, WD_CMD_NEGATE_ACK);
978 hostdata->state = S_CONNECTED;
979 break;
980
981 case RESTORE_POINTERS:
982 DB(DB_INTR, printk("RDP"))
983 if (hostdata->level2 >= L2_BASIC) {
984 write_wd33c93(regs, WD_COMMAND_PHASE, 0x45);
985 write_wd33c93_cmd(regs, WD_CMD_SEL_ATN_XFER);
986 hostdata->state = S_RUNNING_LEVEL2;
987 } else {
988 write_wd33c93_cmd(regs, WD_CMD_NEGATE_ACK);
989 hostdata->state = S_CONNECTED;
990 }
991 break;
992
993 case DISCONNECT:
994 DB(DB_INTR, printk("DIS"))
995 cmd->device->disconnect = 1;
996 write_wd33c93_cmd(regs, WD_CMD_NEGATE_ACK);
997 hostdata->state = S_PRE_TMP_DISC;
998 break;
999
1000 case MESSAGE_REJECT:
1001 DB(DB_INTR, printk("REJ"))
1002#ifdef SYNC_DEBUG
1003 printk("-REJ-");
1004#endif
1005 if (hostdata->sync_stat[cmd->device->id] == SS_WAITING)
1006 hostdata->sync_stat[cmd->device->id] = SS_SET;
1007 write_wd33c93_cmd(regs, WD_CMD_NEGATE_ACK);
1008 hostdata->state = S_CONNECTED;
1009 break;
1010
1011 case EXTENDED_MESSAGE:
1012 DB(DB_INTR, printk("EXT"))
1013
1014 ucp = hostdata->incoming_msg;
1015
1016#ifdef SYNC_DEBUG
1017 printk("%02x", ucp[hostdata->incoming_ptr]);
1018#endif
1019 /* Is this the last byte of the extended message? */
1020
1021 if ((hostdata->incoming_ptr >= 2) &&
1022 (hostdata->incoming_ptr == (ucp[1] + 1))) {
1023
1024 switch (ucp[2]) { /* what's the EXTENDED code? */
1025 case EXTENDED_SDTR:
1026 id = calc_sync_xfer(ucp[3], ucp[4]);
1027 if (hostdata->sync_stat[cmd->device->id] !=
1028 SS_WAITING) {
1029
1030/* A device has sent an unsolicited SDTR message; rather than go
1031 * through the effort of decoding it and then figuring out what
1032 * our reply should be, we're just gonna say that we have a
1033 * synchronous fifo depth of 0. This will result in asynchronous
1034 * transfers - not ideal but so much easier.
1035 * Actually, this is OK because it assures us that if we don't
1036 * specifically ask for sync transfers, we won't do any.
1037 */
1038
1039 write_wd33c93_cmd(regs, WD_CMD_ASSERT_ATN); /* want MESS_OUT */
1040 hostdata->outgoing_msg[0] =
1041 EXTENDED_MESSAGE;
1042 hostdata->outgoing_msg[1] = 3;
1043 hostdata->outgoing_msg[2] =
1044 EXTENDED_SDTR;
1045 hostdata->outgoing_msg[3] =
1046 hostdata->default_sx_per /
1047 4;
1048 hostdata->outgoing_msg[4] = 0;
1049 hostdata->outgoing_len = 5;
1050 hostdata->sync_xfer[cmd->device->id] =
1051 calc_sync_xfer(hostdata->
1052 default_sx_per
1053 / 4, 0);
1054 } else {
1055 hostdata->sync_xfer[cmd->device->id] = id;
1056 }
1057#ifdef SYNC_DEBUG
1058 printk("sync_xfer=%02x",
1059 hostdata->sync_xfer[cmd->device->id]);
1060#endif
1061 hostdata->sync_stat[cmd->device->id] =
1062 SS_SET;
1063 write_wd33c93_cmd(regs,
1064 WD_CMD_NEGATE_ACK);
1065 hostdata->state = S_CONNECTED;
1066 break;
1067 case EXTENDED_WDTR:
1068 write_wd33c93_cmd(regs, WD_CMD_ASSERT_ATN); /* want MESS_OUT */
1069 printk("sending WDTR ");
1070 hostdata->outgoing_msg[0] =
1071 EXTENDED_MESSAGE;
1072 hostdata->outgoing_msg[1] = 2;
1073 hostdata->outgoing_msg[2] =
1074 EXTENDED_WDTR;
1075 hostdata->outgoing_msg[3] = 0; /* 8 bit transfer width */
1076 hostdata->outgoing_len = 4;
1077 write_wd33c93_cmd(regs,
1078 WD_CMD_NEGATE_ACK);
1079 hostdata->state = S_CONNECTED;
1080 break;
1081 default:
1082 write_wd33c93_cmd(regs, WD_CMD_ASSERT_ATN); /* want MESS_OUT */
1083 printk
1084 ("Rejecting Unknown Extended Message(%02x). ",
1085 ucp[2]);
1086 hostdata->outgoing_msg[0] =
1087 MESSAGE_REJECT;
1088 hostdata->outgoing_len = 1;
1089 write_wd33c93_cmd(regs,
1090 WD_CMD_NEGATE_ACK);
1091 hostdata->state = S_CONNECTED;
1092 break;
1093 }
1094 hostdata->incoming_ptr = 0;
1095 }
1096
1097 /* We need to read more MESS_IN bytes for the extended message */
1098
1099 else {
1100 hostdata->incoming_ptr++;
1101 write_wd33c93_cmd(regs, WD_CMD_NEGATE_ACK);
1102 hostdata->state = S_CONNECTED;
1103 }
1104 break;
1105
1106 default:
1107 printk("Rejecting Unknown Message(%02x) ", msg);
1108 write_wd33c93_cmd(regs, WD_CMD_ASSERT_ATN); /* want MESS_OUT */
1109 hostdata->outgoing_msg[0] = MESSAGE_REJECT;
1110 hostdata->outgoing_len = 1;
1111 write_wd33c93_cmd(regs, WD_CMD_NEGATE_ACK);
1112 hostdata->state = S_CONNECTED;
1113 }
1114 spin_unlock_irqrestore(&hostdata->lock, flags);
1115 break;
1116
1117/* Note: this interrupt will occur only after a LEVEL2 command */
1118
1119 case CSR_SEL_XFER_DONE:
1120
1121/* Make sure that reselection is enabled at this point - it may
1122 * have been turned off for the command that just completed.
1123 */
1124
1125 write_wd33c93(regs, WD_SOURCE_ID, SRCID_ER);
1126 if (phs == 0x60) {
1127 DB(DB_INTR, printk("SX-DONE-%ld", cmd->pid))
1128 cmd->SCp.Message = COMMAND_COMPLETE;
1129 lun = read_wd33c93(regs, WD_TARGET_LUN);
1130 DB(DB_INTR, printk(":%d.%d", cmd->SCp.Status, lun))
1131 hostdata->connected = NULL;
1132 hostdata->busy[cmd->device->id] &= ~(1 << cmd->device->lun);
1133 hostdata->state = S_UNCONNECTED;
1134 if (cmd->SCp.Status == ILLEGAL_STATUS_BYTE)
1135 cmd->SCp.Status = lun;
1136 if (cmd->cmnd[0] == REQUEST_SENSE
1137 && cmd->SCp.Status != GOOD)
1138 cmd->result =
1139 (cmd->
1140 result & 0x00ffff) | (DID_ERROR << 16);
1141 else
1142 cmd->result =
1143 cmd->SCp.Status | (cmd->SCp.Message << 8);
1144 cmd->scsi_done(cmd);
1145
1146/* We are no longer connected to a target - check to see if
1147 * there are commands waiting to be executed.
1148 */
1149 spin_unlock_irqrestore(&hostdata->lock, flags);
1150 wd33c93_execute(instance);
1151 } else {
1152 printk
1153 ("%02x:%02x:%02x-%ld: Unknown SEL_XFER_DONE phase!!---",
1154 asr, sr, phs, cmd->pid);
1155 spin_unlock_irqrestore(&hostdata->lock, flags);
1156 }
1157 break;
1158
1159/* Note: this interrupt will occur only after a LEVEL2 command */
1160
1161 case CSR_SDP:
1162 DB(DB_INTR, printk("SDP"))
1163 hostdata->state = S_RUNNING_LEVEL2;
1164 write_wd33c93(regs, WD_COMMAND_PHASE, 0x41);
1165 write_wd33c93_cmd(regs, WD_CMD_SEL_ATN_XFER);
1166 spin_unlock_irqrestore(&hostdata->lock, flags);
1167 break;
1168
1169 case CSR_XFER_DONE | PHS_MESS_OUT:
1170 case CSR_UNEXP | PHS_MESS_OUT:
1171 case CSR_SRV_REQ | PHS_MESS_OUT:
1172 DB(DB_INTR, printk("MSG_OUT="))
1173
1174/* To get here, we've probably requested MESSAGE_OUT and have
1175 * already put the correct bytes in outgoing_msg[] and filled
1176 * in outgoing_len. We simply send them out to the SCSI bus.
1177 * Sometimes we get MESSAGE_OUT phase when we're not expecting
1178 * it - like when our SDTR message is rejected by a target. Some
1179 * targets send the REJECT before receiving all of the extended
1180 * message, and then seem to go back to MESSAGE_OUT for a byte
1181 * or two. Not sure why, or if I'm doing something wrong to
1182 * cause this to happen. Regardless, it seems that sending
1183 * NOP messages in these situations results in no harm and
1184 * makes everyone happy.
1185 */
1186 if (hostdata->outgoing_len == 0) {
1187 hostdata->outgoing_len = 1;
1188 hostdata->outgoing_msg[0] = NOP;
1189 }
1190 transfer_pio(regs, hostdata->outgoing_msg,
1191 hostdata->outgoing_len, DATA_OUT_DIR, hostdata);
1192 DB(DB_INTR, printk("%02x", hostdata->outgoing_msg[0]))
1193 hostdata->outgoing_len = 0;
1194 hostdata->state = S_CONNECTED;
1195 spin_unlock_irqrestore(&hostdata->lock, flags);
1196 break;
1197
1198 case CSR_UNEXP_DISC:
1199
1200/* I think I've seen this after a request-sense that was in response
1201 * to an error condition, but not sure. We certainly need to do
1202 * something when we get this interrupt - the question is 'what?'.
1203 * Let's think positively, and assume some command has finished
1204 * in a legal manner (like a command that provokes a request-sense),
1205 * so we treat it as a normal command-complete-disconnect.
1206 */
1207
1208/* Make sure that reselection is enabled at this point - it may
1209 * have been turned off for the command that just completed.
1210 */
1211
1212 write_wd33c93(regs, WD_SOURCE_ID, SRCID_ER);
1213 if (cmd == NULL) {
1214 printk(" - Already disconnected! ");
1215 hostdata->state = S_UNCONNECTED;
1216 spin_unlock_irqrestore(&hostdata->lock, flags);
1217 return;
1218 }
1219 DB(DB_INTR, printk("UNEXP_DISC-%ld", cmd->pid))
1220 hostdata->connected = NULL;
1221 hostdata->busy[cmd->device->id] &= ~(1 << cmd->device->lun);
1222 hostdata->state = S_UNCONNECTED;
1223 if (cmd->cmnd[0] == REQUEST_SENSE && cmd->SCp.Status != GOOD)
1224 cmd->result =
1225 (cmd->result & 0x00ffff) | (DID_ERROR << 16);
1226 else
1227 cmd->result = cmd->SCp.Status | (cmd->SCp.Message << 8);
1228 cmd->scsi_done(cmd);
1229
1230/* We are no longer connected to a target - check to see if
1231 * there are commands waiting to be executed.
1232 */
1233 /* look above for comments on scsi_done() */
1234 spin_unlock_irqrestore(&hostdata->lock, flags);
1235 wd33c93_execute(instance);
1236 break;
1237
1238 case CSR_DISC:
1239
1240/* Make sure that reselection is enabled at this point - it may
1241 * have been turned off for the command that just completed.
1242 */
1243
1244 write_wd33c93(regs, WD_SOURCE_ID, SRCID_ER);
1245 DB(DB_INTR, printk("DISC-%ld", cmd->pid))
1246 if (cmd == NULL) {
1247 printk(" - Already disconnected! ");
1248 hostdata->state = S_UNCONNECTED;
1249 }
1250 switch (hostdata->state) {
1251 case S_PRE_CMP_DISC:
1252 hostdata->connected = NULL;
1253 hostdata->busy[cmd->device->id] &= ~(1 << cmd->device->lun);
1254 hostdata->state = S_UNCONNECTED;
1255 DB(DB_INTR, printk(":%d", cmd->SCp.Status))
1256 if (cmd->cmnd[0] == REQUEST_SENSE
1257 && cmd->SCp.Status != GOOD)
1258 cmd->result =
1259 (cmd->
1260 result & 0x00ffff) | (DID_ERROR << 16);
1261 else
1262 cmd->result =
1263 cmd->SCp.Status | (cmd->SCp.Message << 8);
1264 cmd->scsi_done(cmd);
1265 break;
1266 case S_PRE_TMP_DISC:
1267 case S_RUNNING_LEVEL2:
1268 cmd->host_scribble = (uchar *) hostdata->disconnected_Q;
1269 hostdata->disconnected_Q = cmd;
1270 hostdata->connected = NULL;
1271 hostdata->state = S_UNCONNECTED;
1272
1273#ifdef PROC_STATISTICS
1274 hostdata->disc_done_cnt[cmd->device->id]++;
1275#endif
1276
1277 break;
1278 default:
1279 printk("*** Unexpected DISCONNECT interrupt! ***");
1280 hostdata->state = S_UNCONNECTED;
1281 }
1282
1283/* We are no longer connected to a target - check to see if
1284 * there are commands waiting to be executed.
1285 */
1286 spin_unlock_irqrestore(&hostdata->lock, flags);
1287 wd33c93_execute(instance);
1288 break;
1289
1290 case CSR_RESEL_AM:
1291 case CSR_RESEL:
1292 DB(DB_INTR, printk("RESEL%s", sr == CSR_RESEL_AM ? "_AM" : ""))
1293
1294 /* Old chips (pre -A ???) don't have advanced features and will
1295 * generate CSR_RESEL. In that case we have to extract the LUN the
1296 * hard way (see below).
1297 * First we have to make sure this reselection didn't
1298 * happen during Arbitration/Selection of some other device.
1299 * If yes, put losing command back on top of input_Q.
1300 */
1301 if (hostdata->level2 <= L2_NONE) {
1302
1303 if (hostdata->selecting) {
1304 cmd = (struct scsi_cmnd *) hostdata->selecting;
1305 hostdata->selecting = NULL;
1306 hostdata->busy[cmd->device->id] &= ~(1 << cmd->device->lun);
1307 cmd->host_scribble =
1308 (uchar *) hostdata->input_Q;
1309 hostdata->input_Q = cmd;
1310 }
1311 }
1312
1313 else {
1314
1315 if (cmd) {
1316 if (phs == 0x00) {
1317 hostdata->busy[cmd->device->id] &=
1318 ~(1 << cmd->device->lun);
1319 cmd->host_scribble =
1320 (uchar *) hostdata->input_Q;
1321 hostdata->input_Q = cmd;
1322 } else {
1323 printk
1324 ("---%02x:%02x:%02x-TROUBLE: Intrusive ReSelect!---",
1325 asr, sr, phs);
1326 while (1)
1327 printk("\r");
1328 }
1329 }
1330
1331 }
1332
1333 /* OK - find out which device reselected us. */
1334
1335 id = read_wd33c93(regs, WD_SOURCE_ID);
1336 id &= SRCID_MASK;
1337
1338 /* and extract the lun from the ID message. (Note that we don't
1339 * bother to check for a valid message here - I guess this is
1340 * not the right way to go, but...)
1341 */
1342
1343 if (sr == CSR_RESEL_AM) {
1344 lun = read_wd33c93(regs, WD_DATA);
1345 if (hostdata->level2 < L2_RESELECT)
1346 write_wd33c93_cmd(regs, WD_CMD_NEGATE_ACK);
1347 lun &= 7;
1348 } else {
1349 /* Old chip; wait for msgin phase to pick up the LUN. */
1350 for (lun = 255; lun; lun--) {
1351 if ((asr = read_aux_stat(regs)) & ASR_INT)
1352 break;
1353 udelay(10);
1354 }
1355 if (!(asr & ASR_INT)) {
1356 printk
1357 ("wd33c93: Reselected without IDENTIFY\n");
1358 lun = 0;
1359 } else {
1360 /* Verify this is a change to MSG_IN and read the message */
1361 sr = read_wd33c93(regs, WD_SCSI_STATUS);
Roman Zippel882905c2006-06-23 02:04:57 -07001362 udelay(7);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001363 if (sr == (CSR_ABORT | PHS_MESS_IN) ||
1364 sr == (CSR_UNEXP | PHS_MESS_IN) ||
1365 sr == (CSR_SRV_REQ | PHS_MESS_IN)) {
1366 /* Got MSG_IN, grab target LUN */
1367 lun = read_1_byte(regs);
1368 /* Now we expect a 'paused with ACK asserted' int.. */
1369 asr = read_aux_stat(regs);
1370 if (!(asr & ASR_INT)) {
1371 udelay(10);
1372 asr = read_aux_stat(regs);
1373 if (!(asr & ASR_INT))
1374 printk
1375 ("wd33c93: No int after LUN on RESEL (%02x)\n",
1376 asr);
1377 }
1378 sr = read_wd33c93(regs, WD_SCSI_STATUS);
Roman Zippel882905c2006-06-23 02:04:57 -07001379 udelay(7);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001380 if (sr != CSR_MSGIN)
1381 printk
1382 ("wd33c93: Not paused with ACK on RESEL (%02x)\n",
1383 sr);
1384 lun &= 7;
1385 write_wd33c93_cmd(regs,
1386 WD_CMD_NEGATE_ACK);
1387 } else {
1388 printk
1389 ("wd33c93: Not MSG_IN on reselect (%02x)\n",
1390 sr);
1391 lun = 0;
1392 }
1393 }
1394 }
1395
1396 /* Now we look for the command that's reconnecting. */
1397
1398 cmd = (struct scsi_cmnd *) hostdata->disconnected_Q;
1399 patch = NULL;
1400 while (cmd) {
1401 if (id == cmd->device->id && lun == cmd->device->lun)
1402 break;
1403 patch = cmd;
1404 cmd = (struct scsi_cmnd *) cmd->host_scribble;
1405 }
1406
1407 /* Hmm. Couldn't find a valid command.... What to do? */
1408
1409 if (!cmd) {
1410 printk
1411 ("---TROUBLE: target %d.%d not in disconnect queue---",
1412 id, lun);
1413 spin_unlock_irqrestore(&hostdata->lock, flags);
1414 return;
1415 }
1416
1417 /* Ok, found the command - now start it up again. */
1418
1419 if (patch)
1420 patch->host_scribble = cmd->host_scribble;
1421 else
1422 hostdata->disconnected_Q =
1423 (struct scsi_cmnd *) cmd->host_scribble;
1424 hostdata->connected = cmd;
1425
1426 /* We don't need to worry about 'initialize_SCp()' or 'hostdata->busy[]'
1427 * because these things are preserved over a disconnect.
1428 * But we DO need to fix the DPD bit so it's correct for this command.
1429 */
1430
1431 if (cmd->sc_data_direction == DMA_TO_DEVICE)
1432 write_wd33c93(regs, WD_DESTINATION_ID, cmd->device->id);
1433 else
1434 write_wd33c93(regs, WD_DESTINATION_ID,
1435 cmd->device->id | DSTID_DPD);
1436 if (hostdata->level2 >= L2_RESELECT) {
1437 write_wd33c93_count(regs, 0); /* we want a DATA_PHASE interrupt */
1438 write_wd33c93(regs, WD_COMMAND_PHASE, 0x45);
1439 write_wd33c93_cmd(regs, WD_CMD_SEL_ATN_XFER);
1440 hostdata->state = S_RUNNING_LEVEL2;
1441 } else
1442 hostdata->state = S_CONNECTED;
1443
1444 DB(DB_INTR, printk("-%ld", cmd->pid))
1445 spin_unlock_irqrestore(&hostdata->lock, flags);
1446 break;
1447
1448 default:
1449 printk("--UNKNOWN INTERRUPT:%02x:%02x:%02x--", asr, sr, phs);
1450 spin_unlock_irqrestore(&hostdata->lock, flags);
1451 }
1452
1453 DB(DB_INTR, printk("} "))
1454
1455}
1456
1457static void
1458reset_wd33c93(struct Scsi_Host *instance)
1459{
1460 struct WD33C93_hostdata *hostdata =
1461 (struct WD33C93_hostdata *) instance->hostdata;
1462 const wd33c93_regs regs = hostdata->regs;
1463 uchar sr;
1464
1465#ifdef CONFIG_SGI_IP22
1466 {
1467 int busycount = 0;
1468 extern void sgiwd93_reset(unsigned long);
1469 /* wait 'til the chip gets some time for us */
1470 while ((read_aux_stat(regs) & ASR_BSY) && busycount++ < 100)
1471 udelay (10);
1472 /*
1473 * there are scsi devices out there, which manage to lock up
1474 * the wd33c93 in a busy condition. In this state it won't
1475 * accept the reset command. The only way to solve this is to
1476 * give the chip a hardware reset (if possible). The code below
1477 * does this for the SGI Indy, where this is possible
1478 */
1479 /* still busy ? */
1480 if (read_aux_stat(regs) & ASR_BSY)
1481 sgiwd93_reset(instance->base); /* yeah, give it the hard one */
1482 }
1483#endif
1484
1485 write_wd33c93(regs, WD_OWN_ID, OWNID_EAF | OWNID_RAF |
1486 instance->this_id | hostdata->clock_freq);
1487 write_wd33c93(regs, WD_CONTROL, CTRL_IDI | CTRL_EDI | CTRL_POLLED);
1488 write_wd33c93(regs, WD_SYNCHRONOUS_TRANSFER,
1489 calc_sync_xfer(hostdata->default_sx_per / 4,
1490 DEFAULT_SX_OFF));
1491 write_wd33c93(regs, WD_COMMAND, WD_CMD_RESET);
1492
1493
1494#ifdef CONFIG_MVME147_SCSI
1495 udelay(25); /* The old wd33c93 on MVME147 needs this, at least */
1496#endif
1497
1498 while (!(read_aux_stat(regs) & ASR_INT))
1499 ;
1500 sr = read_wd33c93(regs, WD_SCSI_STATUS);
1501
1502 hostdata->microcode = read_wd33c93(regs, WD_CDB_1);
1503 if (sr == 0x00)
1504 hostdata->chip = C_WD33C93;
1505 else if (sr == 0x01) {
1506 write_wd33c93(regs, WD_QUEUE_TAG, 0xa5); /* any random number */
1507 sr = read_wd33c93(regs, WD_QUEUE_TAG);
1508 if (sr == 0xa5) {
1509 hostdata->chip = C_WD33C93B;
1510 write_wd33c93(regs, WD_QUEUE_TAG, 0);
1511 } else
1512 hostdata->chip = C_WD33C93A;
1513 } else
1514 hostdata->chip = C_UNKNOWN_CHIP;
1515
1516 write_wd33c93(regs, WD_TIMEOUT_PERIOD, TIMEOUT_PERIOD_VALUE);
1517 write_wd33c93(regs, WD_CONTROL, CTRL_IDI | CTRL_EDI | CTRL_POLLED);
1518}
1519
1520int
1521wd33c93_host_reset(struct scsi_cmnd * SCpnt)
1522{
1523 struct Scsi_Host *instance;
1524 struct WD33C93_hostdata *hostdata;
1525 int i;
1526
1527 instance = SCpnt->device->host;
1528 hostdata = (struct WD33C93_hostdata *) instance->hostdata;
1529
1530 printk("scsi%d: reset. ", instance->host_no);
1531 disable_irq(instance->irq);
1532
1533 hostdata->dma_stop(instance, NULL, 0);
1534 for (i = 0; i < 8; i++) {
1535 hostdata->busy[i] = 0;
1536 hostdata->sync_xfer[i] =
1537 calc_sync_xfer(DEFAULT_SX_PER / 4, DEFAULT_SX_OFF);
1538 hostdata->sync_stat[i] = SS_UNSET; /* using default sync values */
1539 }
1540 hostdata->input_Q = NULL;
1541 hostdata->selecting = NULL;
1542 hostdata->connected = NULL;
1543 hostdata->disconnected_Q = NULL;
1544 hostdata->state = S_UNCONNECTED;
1545 hostdata->dma = D_DMA_OFF;
1546 hostdata->incoming_ptr = 0;
1547 hostdata->outgoing_len = 0;
1548
1549 reset_wd33c93(instance);
1550 SCpnt->result = DID_RESET << 16;
1551 enable_irq(instance->irq);
1552 return SUCCESS;
1553}
1554
1555int
1556wd33c93_abort(struct scsi_cmnd * cmd)
1557{
1558 struct Scsi_Host *instance;
1559 struct WD33C93_hostdata *hostdata;
1560 wd33c93_regs regs;
1561 struct scsi_cmnd *tmp, *prev;
1562
1563 disable_irq(cmd->device->host->irq);
1564
1565 instance = cmd->device->host;
1566 hostdata = (struct WD33C93_hostdata *) instance->hostdata;
1567 regs = hostdata->regs;
1568
1569/*
1570 * Case 1 : If the command hasn't been issued yet, we simply remove it
1571 * from the input_Q.
1572 */
1573
1574 tmp = (struct scsi_cmnd *) hostdata->input_Q;
Al Viroa5d361f2006-01-12 01:06:34 -08001575 prev = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001576 while (tmp) {
1577 if (tmp == cmd) {
1578 if (prev)
1579 prev->host_scribble = cmd->host_scribble;
1580 else
1581 hostdata->input_Q =
1582 (struct scsi_cmnd *) cmd->host_scribble;
1583 cmd->host_scribble = NULL;
1584 cmd->result = DID_ABORT << 16;
1585 printk
1586 ("scsi%d: Abort - removing command %ld from input_Q. ",
1587 instance->host_no, cmd->pid);
1588 enable_irq(cmd->device->host->irq);
1589 cmd->scsi_done(cmd);
1590 return SUCCESS;
1591 }
1592 prev = tmp;
1593 tmp = (struct scsi_cmnd *) tmp->host_scribble;
1594 }
1595
1596/*
1597 * Case 2 : If the command is connected, we're going to fail the abort
1598 * and let the high level SCSI driver retry at a later time or
1599 * issue a reset.
1600 *
1601 * Timeouts, and therefore aborted commands, will be highly unlikely
1602 * and handling them cleanly in this situation would make the common
1603 * case of noresets less efficient, and would pollute our code. So,
1604 * we fail.
1605 */
1606
1607 if (hostdata->connected == cmd) {
1608 uchar sr, asr;
1609 unsigned long timeout;
1610
1611 printk("scsi%d: Aborting connected command %ld - ",
1612 instance->host_no, cmd->pid);
1613
1614 printk("stopping DMA - ");
1615 if (hostdata->dma == D_DMA_RUNNING) {
1616 hostdata->dma_stop(instance, cmd, 0);
1617 hostdata->dma = D_DMA_OFF;
1618 }
1619
1620 printk("sending wd33c93 ABORT command - ");
1621 write_wd33c93(regs, WD_CONTROL,
1622 CTRL_IDI | CTRL_EDI | CTRL_POLLED);
1623 write_wd33c93_cmd(regs, WD_CMD_ABORT);
1624
1625/* Now we have to attempt to flush out the FIFO... */
1626
1627 printk("flushing fifo - ");
1628 timeout = 1000000;
1629 do {
1630 asr = read_aux_stat(regs);
1631 if (asr & ASR_DBR)
1632 read_wd33c93(regs, WD_DATA);
1633 } while (!(asr & ASR_INT) && timeout-- > 0);
1634 sr = read_wd33c93(regs, WD_SCSI_STATUS);
1635 printk
1636 ("asr=%02x, sr=%02x, %ld bytes un-transferred (timeout=%ld) - ",
1637 asr, sr, read_wd33c93_count(regs), timeout);
1638
1639 /*
1640 * Abort command processed.
1641 * Still connected.
1642 * We must disconnect.
1643 */
1644
1645 printk("sending wd33c93 DISCONNECT command - ");
1646 write_wd33c93_cmd(regs, WD_CMD_DISCONNECT);
1647
1648 timeout = 1000000;
1649 asr = read_aux_stat(regs);
1650 while ((asr & ASR_CIP) && timeout-- > 0)
1651 asr = read_aux_stat(regs);
1652 sr = read_wd33c93(regs, WD_SCSI_STATUS);
1653 printk("asr=%02x, sr=%02x.", asr, sr);
1654
1655 hostdata->busy[cmd->device->id] &= ~(1 << cmd->device->lun);
1656 hostdata->connected = NULL;
1657 hostdata->state = S_UNCONNECTED;
1658 cmd->result = DID_ABORT << 16;
1659
1660/* sti();*/
1661 wd33c93_execute(instance);
1662
1663 enable_irq(cmd->device->host->irq);
1664 cmd->scsi_done(cmd);
1665 return SUCCESS;
1666 }
1667
1668/*
1669 * Case 3: If the command is currently disconnected from the bus,
1670 * we're not going to expend much effort here: Let's just return
1671 * an ABORT_SNOOZE and hope for the best...
1672 */
1673
1674 tmp = (struct scsi_cmnd *) hostdata->disconnected_Q;
1675 while (tmp) {
1676 if (tmp == cmd) {
1677 printk
1678 ("scsi%d: Abort - command %ld found on disconnected_Q - ",
1679 instance->host_no, cmd->pid);
1680 printk("Abort SNOOZE. ");
1681 enable_irq(cmd->device->host->irq);
1682 return FAILED;
1683 }
1684 tmp = (struct scsi_cmnd *) tmp->host_scribble;
1685 }
1686
1687/*
1688 * Case 4 : If we reached this point, the command was not found in any of
1689 * the queues.
1690 *
1691 * We probably reached this point because of an unlikely race condition
1692 * between the command completing successfully and the abortion code,
1693 * so we won't panic, but we will notify the user in case something really
1694 * broke.
1695 */
1696
1697/* sti();*/
1698 wd33c93_execute(instance);
1699
1700 enable_irq(cmd->device->host->irq);
1701 printk("scsi%d: warning : SCSI command probably completed successfully"
1702 " before abortion. ", instance->host_no);
1703 return FAILED;
1704}
1705
1706#define MAX_WD33C93_HOSTS 4
Tobias Klauser6391a112006-06-08 22:23:48 -07001707#define MAX_SETUP_ARGS ARRAY_SIZE(setup_args)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001708#define SETUP_BUFFER_SIZE 200
1709static char setup_buffer[SETUP_BUFFER_SIZE];
1710static char setup_used[MAX_SETUP_ARGS];
1711static int done_setup = 0;
1712
1713int
1714wd33c93_setup(char *str)
1715{
1716 int i;
1717 char *p1, *p2;
1718
1719 /* The kernel does some processing of the command-line before calling
1720 * this function: If it begins with any decimal or hex number arguments,
1721 * ints[0] = how many numbers found and ints[1] through [n] are the values
1722 * themselves. str points to where the non-numeric arguments (if any)
1723 * start: We do our own parsing of those. We construct synthetic 'nosync'
1724 * keywords out of numeric args (to maintain compatibility with older
1725 * versions) and then add the rest of the arguments.
1726 */
1727
1728 p1 = setup_buffer;
1729 *p1 = '\0';
1730 if (str)
1731 strncpy(p1, str, SETUP_BUFFER_SIZE - strlen(setup_buffer));
1732 setup_buffer[SETUP_BUFFER_SIZE - 1] = '\0';
1733 p1 = setup_buffer;
1734 i = 0;
1735 while (*p1 && (i < MAX_SETUP_ARGS)) {
1736 p2 = strchr(p1, ',');
1737 if (p2) {
1738 *p2 = '\0';
1739 if (p1 != p2)
1740 setup_args[i] = p1;
1741 p1 = p2 + 1;
1742 i++;
1743 } else {
1744 setup_args[i] = p1;
1745 break;
1746 }
1747 }
1748 for (i = 0; i < MAX_SETUP_ARGS; i++)
1749 setup_used[i] = 0;
1750 done_setup = 1;
1751
1752 return 1;
1753}
1754__setup("wd33c93=", wd33c93_setup);
1755
1756/* check_setup_args() returns index if key found, 0 if not
1757 */
1758static int
1759check_setup_args(char *key, int *flags, int *val, char *buf)
1760{
1761 int x;
1762 char *cp;
1763
1764 for (x = 0; x < MAX_SETUP_ARGS; x++) {
1765 if (setup_used[x])
1766 continue;
1767 if (!strncmp(setup_args[x], key, strlen(key)))
1768 break;
1769 if (!strncmp(setup_args[x], "next", strlen("next")))
1770 return 0;
1771 }
1772 if (x == MAX_SETUP_ARGS)
1773 return 0;
1774 setup_used[x] = 1;
1775 cp = setup_args[x] + strlen(key);
1776 *val = -1;
1777 if (*cp != ':')
1778 return ++x;
1779 cp++;
1780 if ((*cp >= '0') && (*cp <= '9')) {
1781 *val = simple_strtoul(cp, NULL, 0);
1782 }
1783 return ++x;
1784}
1785
1786void
1787wd33c93_init(struct Scsi_Host *instance, const wd33c93_regs regs,
1788 dma_setup_t setup, dma_stop_t stop, int clock_freq)
1789{
1790 struct WD33C93_hostdata *hostdata;
1791 int i;
1792 int flags;
1793 int val;
1794 char buf[32];
1795
1796 if (!done_setup && setup_strings)
1797 wd33c93_setup(setup_strings);
1798
1799 hostdata = (struct WD33C93_hostdata *) instance->hostdata;
1800
1801 hostdata->regs = regs;
1802 hostdata->clock_freq = clock_freq;
1803 hostdata->dma_setup = setup;
1804 hostdata->dma_stop = stop;
1805 hostdata->dma_bounce_buffer = NULL;
1806 hostdata->dma_bounce_len = 0;
1807 for (i = 0; i < 8; i++) {
1808 hostdata->busy[i] = 0;
1809 hostdata->sync_xfer[i] =
1810 calc_sync_xfer(DEFAULT_SX_PER / 4, DEFAULT_SX_OFF);
1811 hostdata->sync_stat[i] = SS_UNSET; /* using default sync values */
1812#ifdef PROC_STATISTICS
1813 hostdata->cmd_cnt[i] = 0;
1814 hostdata->disc_allowed_cnt[i] = 0;
1815 hostdata->disc_done_cnt[i] = 0;
1816#endif
1817 }
1818 hostdata->input_Q = NULL;
1819 hostdata->selecting = NULL;
1820 hostdata->connected = NULL;
1821 hostdata->disconnected_Q = NULL;
1822 hostdata->state = S_UNCONNECTED;
1823 hostdata->dma = D_DMA_OFF;
1824 hostdata->level2 = L2_BASIC;
1825 hostdata->disconnect = DIS_ADAPTIVE;
1826 hostdata->args = DEBUG_DEFAULTS;
1827 hostdata->incoming_ptr = 0;
1828 hostdata->outgoing_len = 0;
1829 hostdata->default_sx_per = DEFAULT_SX_PER;
1830 hostdata->no_sync = 0xff; /* sync defaults to off */
1831 hostdata->no_dma = 0; /* default is DMA enabled */
1832
1833#ifdef PROC_INTERFACE
1834 hostdata->proc = PR_VERSION | PR_INFO | PR_STATISTICS |
1835 PR_CONNECTED | PR_INPUTQ | PR_DISCQ | PR_STOP;
1836#ifdef PROC_STATISTICS
1837 hostdata->dma_cnt = 0;
1838 hostdata->pio_cnt = 0;
1839 hostdata->int_cnt = 0;
1840#endif
1841#endif
1842
1843 if (check_setup_args("nosync", &flags, &val, buf))
1844 hostdata->no_sync = val;
1845
1846 if (check_setup_args("nodma", &flags, &val, buf))
1847 hostdata->no_dma = (val == -1) ? 1 : val;
1848
1849 if (check_setup_args("period", &flags, &val, buf))
1850 hostdata->default_sx_per =
1851 sx_table[round_period((unsigned int) val)].period_ns;
1852
1853 if (check_setup_args("disconnect", &flags, &val, buf)) {
1854 if ((val >= DIS_NEVER) && (val <= DIS_ALWAYS))
1855 hostdata->disconnect = val;
1856 else
1857 hostdata->disconnect = DIS_ADAPTIVE;
1858 }
1859
1860 if (check_setup_args("level2", &flags, &val, buf))
1861 hostdata->level2 = val;
1862
1863 if (check_setup_args("debug", &flags, &val, buf))
1864 hostdata->args = val & DB_MASK;
1865
1866 if (check_setup_args("clock", &flags, &val, buf)) {
1867 if (val > 7 && val < 11)
1868 val = WD33C93_FS_8_10;
1869 else if (val > 11 && val < 16)
1870 val = WD33C93_FS_12_15;
1871 else if (val > 15 && val < 21)
1872 val = WD33C93_FS_16_20;
1873 else
1874 val = WD33C93_FS_8_10;
1875 hostdata->clock_freq = val;
1876 }
1877
1878 if ((i = check_setup_args("next", &flags, &val, buf))) {
1879 while (i)
1880 setup_used[--i] = 1;
1881 }
1882#ifdef PROC_INTERFACE
1883 if (check_setup_args("proc", &flags, &val, buf))
1884 hostdata->proc = val;
1885#endif
1886
1887 spin_lock_irq(&hostdata->lock);
1888 reset_wd33c93(instance);
1889 spin_unlock_irq(&hostdata->lock);
1890
1891 printk("wd33c93-%d: chip=%s/%d no_sync=0x%x no_dma=%d",
1892 instance->host_no,
1893 (hostdata->chip == C_WD33C93) ? "WD33c93" : (hostdata->chip ==
1894 C_WD33C93A) ?
1895 "WD33c93A" : (hostdata->chip ==
1896 C_WD33C93B) ? "WD33c93B" : "unknown",
1897 hostdata->microcode, hostdata->no_sync, hostdata->no_dma);
1898#ifdef DEBUGGING_ON
1899 printk(" debug_flags=0x%02x\n", hostdata->args);
1900#else
1901 printk(" debugging=OFF\n");
1902#endif
1903 printk(" setup_args=");
1904 for (i = 0; i < MAX_SETUP_ARGS; i++)
1905 printk("%s,", setup_args[i]);
1906 printk("\n");
1907 printk(" Version %s - %s, Compiled %s at %s\n",
1908 WD33C93_VERSION, WD33C93_DATE, __DATE__, __TIME__);
1909}
1910
1911int
1912wd33c93_proc_info(struct Scsi_Host *instance, char *buf, char **start, off_t off, int len, int in)
1913{
1914
1915#ifdef PROC_INTERFACE
1916
1917 char *bp;
1918 char tbuf[128];
1919 struct WD33C93_hostdata *hd;
1920 struct scsi_cmnd *cmd;
1921 int x, i;
1922 static int stop = 0;
1923
1924 hd = (struct WD33C93_hostdata *) instance->hostdata;
1925
1926/* If 'in' is TRUE we need to _read_ the proc file. We accept the following
1927 * keywords (same format as command-line, but only ONE per read):
1928 * debug
1929 * disconnect
1930 * period
1931 * resync
1932 * proc
1933 * nodma
1934 */
1935
1936 if (in) {
1937 buf[len] = '\0';
1938 bp = buf;
1939 if (!strncmp(bp, "debug:", 6)) {
1940 bp += 6;
1941 hd->args = simple_strtoul(bp, NULL, 0) & DB_MASK;
1942 } else if (!strncmp(bp, "disconnect:", 11)) {
1943 bp += 11;
1944 x = simple_strtoul(bp, NULL, 0);
1945 if (x < DIS_NEVER || x > DIS_ALWAYS)
1946 x = DIS_ADAPTIVE;
1947 hd->disconnect = x;
1948 } else if (!strncmp(bp, "period:", 7)) {
1949 bp += 7;
1950 x = simple_strtoul(bp, NULL, 0);
1951 hd->default_sx_per =
1952 sx_table[round_period((unsigned int) x)].period_ns;
1953 } else if (!strncmp(bp, "resync:", 7)) {
1954 bp += 7;
1955 x = simple_strtoul(bp, NULL, 0);
1956 for (i = 0; i < 7; i++)
1957 if (x & (1 << i))
1958 hd->sync_stat[i] = SS_UNSET;
1959 } else if (!strncmp(bp, "proc:", 5)) {
1960 bp += 5;
1961 hd->proc = simple_strtoul(bp, NULL, 0);
1962 } else if (!strncmp(bp, "nodma:", 6)) {
1963 bp += 6;
1964 hd->no_dma = simple_strtoul(bp, NULL, 0);
1965 } else if (!strncmp(bp, "level2:", 7)) {
1966 bp += 7;
1967 hd->level2 = simple_strtoul(bp, NULL, 0);
1968 }
1969 return len;
1970 }
1971
1972 spin_lock_irq(&hd->lock);
1973 bp = buf;
1974 *bp = '\0';
1975 if (hd->proc & PR_VERSION) {
1976 sprintf(tbuf, "\nVersion %s - %s. Compiled %s %s",
1977 WD33C93_VERSION, WD33C93_DATE, __DATE__, __TIME__);
1978 strcat(bp, tbuf);
1979 }
1980 if (hd->proc & PR_INFO) {
1981 sprintf(tbuf, "\nclock_freq=%02x no_sync=%02x no_dma=%d",
1982 hd->clock_freq, hd->no_sync, hd->no_dma);
1983 strcat(bp, tbuf);
1984 strcat(bp, "\nsync_xfer[] = ");
1985 for (x = 0; x < 7; x++) {
1986 sprintf(tbuf, "\t%02x", hd->sync_xfer[x]);
1987 strcat(bp, tbuf);
1988 }
1989 strcat(bp, "\nsync_stat[] = ");
1990 for (x = 0; x < 7; x++) {
1991 sprintf(tbuf, "\t%02x", hd->sync_stat[x]);
1992 strcat(bp, tbuf);
1993 }
1994 }
1995#ifdef PROC_STATISTICS
1996 if (hd->proc & PR_STATISTICS) {
1997 strcat(bp, "\ncommands issued: ");
1998 for (x = 0; x < 7; x++) {
1999 sprintf(tbuf, "\t%ld", hd->cmd_cnt[x]);
2000 strcat(bp, tbuf);
2001 }
2002 strcat(bp, "\ndisconnects allowed:");
2003 for (x = 0; x < 7; x++) {
2004 sprintf(tbuf, "\t%ld", hd->disc_allowed_cnt[x]);
2005 strcat(bp, tbuf);
2006 }
2007 strcat(bp, "\ndisconnects done: ");
2008 for (x = 0; x < 7; x++) {
2009 sprintf(tbuf, "\t%ld", hd->disc_done_cnt[x]);
2010 strcat(bp, tbuf);
2011 }
2012 sprintf(tbuf,
2013 "\ninterrupts: %ld, DATA_PHASE ints: %ld DMA, %ld PIO",
2014 hd->int_cnt, hd->dma_cnt, hd->pio_cnt);
2015 strcat(bp, tbuf);
2016 }
2017#endif
2018 if (hd->proc & PR_CONNECTED) {
2019 strcat(bp, "\nconnected: ");
2020 if (hd->connected) {
2021 cmd = (struct scsi_cmnd *) hd->connected;
2022 sprintf(tbuf, " %ld-%d:%d(%02x)",
2023 cmd->pid, cmd->device->id, cmd->device->lun, cmd->cmnd[0]);
2024 strcat(bp, tbuf);
2025 }
2026 }
2027 if (hd->proc & PR_INPUTQ) {
2028 strcat(bp, "\ninput_Q: ");
2029 cmd = (struct scsi_cmnd *) hd->input_Q;
2030 while (cmd) {
2031 sprintf(tbuf, " %ld-%d:%d(%02x)",
2032 cmd->pid, cmd->device->id, cmd->device->lun, cmd->cmnd[0]);
2033 strcat(bp, tbuf);
2034 cmd = (struct scsi_cmnd *) cmd->host_scribble;
2035 }
2036 }
2037 if (hd->proc & PR_DISCQ) {
2038 strcat(bp, "\ndisconnected_Q:");
2039 cmd = (struct scsi_cmnd *) hd->disconnected_Q;
2040 while (cmd) {
2041 sprintf(tbuf, " %ld-%d:%d(%02x)",
2042 cmd->pid, cmd->device->id, cmd->device->lun, cmd->cmnd[0]);
2043 strcat(bp, tbuf);
2044 cmd = (struct scsi_cmnd *) cmd->host_scribble;
2045 }
2046 }
2047 strcat(bp, "\n");
2048 spin_unlock_irq(&hd->lock);
2049 *start = buf;
2050 if (stop) {
2051 stop = 0;
2052 return 0;
2053 }
2054 if (off > 0x40000) /* ALWAYS stop after 256k bytes have been read */
2055 stop = 1;
2056 if (hd->proc & PR_STOP) /* stop every other time */
2057 stop = 1;
2058 return strlen(bp);
2059
2060#else /* PROC_INTERFACE */
2061
2062 return 0;
2063
2064#endif /* PROC_INTERFACE */
2065
2066}
2067
2068void
2069wd33c93_release(void)
2070{
2071}
2072
2073EXPORT_SYMBOL(wd33c93_host_reset);
2074EXPORT_SYMBOL(wd33c93_init);
2075EXPORT_SYMBOL(wd33c93_release);
2076EXPORT_SYMBOL(wd33c93_abort);
2077EXPORT_SYMBOL(wd33c93_queuecommand);
2078EXPORT_SYMBOL(wd33c93_intr);
2079EXPORT_SYMBOL(wd33c93_proc_info);