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OMAP3: PM: Prevented DVFS state switches when enabling off-mode
[linux-ginger.git] / drivers / scsi / aha1542.c
blob80594947c6f6c1a97117be2bedde8fa9b83c75a8
1 /* $Id: aha1542.c,v 1.1 1992/07/24 06:27:38 root Exp root $
2 * linux/kernel/aha1542.c
3 *
4 * Copyright (C) 1992 Tommy Thorn
5 * Copyright (C) 1993, 1994, 1995 Eric Youngdale
6 *
7 * Modified by Eric Youngdale
8 * Use request_irq and request_dma to help prevent unexpected conflicts
9 * Set up on-board DMA controller, such that we do not have to
10 * have the bios enabled to use the aha1542.
11 * Modified by David Gentzel
12 * Don't call request_dma if dma mask is 0 (for BusLogic BT-445S VL-Bus
13 * controller).
14 * Modified by Matti Aarnio
15 * Accept parameters from LILO cmd-line. -- 1-Oct-94
16 * Modified by Mike McLagan <mike.mclagan@linux.org>
17 * Recognise extended mode on AHA1542CP, different bit than 1542CF
18 * 1-Jan-97
19 * Modified by Bjorn L. Thordarson and Einar Thor Einarsson
20 * Recognize that DMA0 is valid DMA channel -- 13-Jul-98
21 * Modified by Chris Faulhaber <jedgar@fxp.org>
22 * Added module command-line options
23 * 19-Jul-99
24 * Modified by Adam Fritzler
25 * Added proper detection of the AHA-1640 (MCA version of AHA-1540)
26 */
27
28 #include <linux/module.h>
29 #include <linux/interrupt.h>
30 #include <linux/kernel.h>
31 #include <linux/types.h>
32 #include <linux/string.h>
33 #include <linux/ioport.h>
34 #include <linux/delay.h>
35 #include <linux/proc_fs.h>
36 #include <linux/init.h>
37 #include <linux/spinlock.h>
38 #include <linux/isapnp.h>
39 #include <linux/blkdev.h>
40 #include <linux/mca.h>
41 #include <linux/mca-legacy.h>
42
43 #include <asm/dma.h>
44 #include <asm/system.h>
45 #include <asm/io.h>
46
47 #include "scsi.h"
48 #include <scsi/scsi_host.h>
49 #include "aha1542.h"
50
51 #define SCSI_BUF_PA(address) isa_virt_to_bus(address)
52 #define SCSI_SG_PA(sgent) (isa_page_to_bus(sg_page((sgent))) + (sgent)->offset)
53
54 static void BAD_SG_DMA(Scsi_Cmnd * SCpnt,
55 struct scatterlist *sgp,
56 int nseg,
57 int badseg)
58 {
59 printk(KERN_CRIT "sgpnt[%d:%d] page %p/0x%llx length %u\n",
60 badseg, nseg, sg_virt(sgp),
61 (unsigned long long)SCSI_SG_PA(sgp),
62 sgp->length);
63
64 /*
65 * Not safe to continue.
66 */
67 panic("Buffer at physical address > 16Mb used for aha1542");
68 }
69
70 #include<linux/stat.h>
71
72 #ifdef DEBUG
73 #define DEB(x) x
74 #else
75 #define DEB(x)
76 #endif
77
78 /*
79 static const char RCSid[] = "$Header: /usr/src/linux/kernel/blk_drv/scsi/RCS/aha1542.c,v 1.1 1992/07/24 06:27:38 root Exp root $";
80 */
81
82 /* The adaptec can be configured for quite a number of addresses, but
83 I generally do not want the card poking around at random. We allow
84 two addresses - this allows people to use the Adaptec with a Midi
85 card, which also used 0x330 -- can be overridden with LILO! */
86
87 #define MAXBOARDS 4 /* Increase this and the sizes of the
88 arrays below, if you need more.. */
89
90 /* Boards 3,4 slots are reserved for ISAPnP/MCA scans */
91
92 static unsigned int bases[MAXBOARDS] __initdata = {0x330, 0x334, 0, 0};
93
94 /* set by aha1542_setup according to the command line; they also may
95 be marked __initdata, but require zero initializers then */
96
97 static int setup_called[MAXBOARDS];
98 static int setup_buson[MAXBOARDS];
99 static int setup_busoff[MAXBOARDS];
100 static int setup_dmaspeed[MAXBOARDS] __initdata = { -1, -1, -1, -1 };
101
102 /*
103 * LILO/Module params: aha1542=<PORTBASE>[,<BUSON>,<BUSOFF>[,<DMASPEED>]]
104 *
105 * Where: <PORTBASE> is any of the valid AHA addresses:
106 * 0x130, 0x134, 0x230, 0x234, 0x330, 0x334
107 * <BUSON> is the time (in microsecs) that AHA spends on the AT-bus
108 * when transferring data. 1542A power-on default is 11us,
109 * valid values are in range: 2..15 (decimal)
110 * <BUSOFF> is the time that AHA spends OFF THE BUS after while
111 * it is transferring data (not to monopolize the bus).
112 * Power-on default is 4us, valid range: 1..64 microseconds.
113 * <DMASPEED> Default is jumper selected (1542A: on the J1),
114 * but experimenter can alter it with this.
115 * Valid values: 5, 6, 7, 8, 10 (MB/s)
116 * Factory default is 5 MB/s.
117 */
118
119 #if defined(MODULE)
120 static int isapnp = 0;
121 static int aha1542[] = {0x330, 11, 4, -1};
122 module_param_array(aha1542, int, NULL, 0);
123 module_param(isapnp, bool, 0);
124
125 static struct isapnp_device_id id_table[] __initdata = {
126 {
127 ISAPNP_ANY_ID, ISAPNP_ANY_ID,
128 ISAPNP_VENDOR('A', 'D', 'P'), ISAPNP_FUNCTION(0x1542),
129 0
130 },
131 {0}
132 };
133
134 MODULE_DEVICE_TABLE(isapnp, id_table);
135
136 #else
137 static int isapnp = 1;
138 #endif
139
140 #define BIOS_TRANSLATION_1632 0 /* Used by some old 1542A boards */
141 #define BIOS_TRANSLATION_6432 1 /* Default case these days */
142 #define BIOS_TRANSLATION_25563 2 /* Big disk case */
143
144 struct aha1542_hostdata {
145 /* This will effectively start both of them at the first mailbox */
146 int bios_translation; /* Mapping bios uses - for compatibility */
147 int aha1542_last_mbi_used;
148 int aha1542_last_mbo_used;
149 Scsi_Cmnd *SCint[AHA1542_MAILBOXES];
150 struct mailbox mb[2 * AHA1542_MAILBOXES];
151 struct ccb ccb[AHA1542_MAILBOXES];
152 };
153
154 #define HOSTDATA(host) ((struct aha1542_hostdata *) &host->hostdata)
155
156 static DEFINE_SPINLOCK(aha1542_lock);
157
158
159
160 #define WAITnexttimeout 3000000
161
162 static void setup_mailboxes(int base_io, struct Scsi_Host *shpnt);
163 static int aha1542_restart(struct Scsi_Host *shost);
164 static void aha1542_intr_handle(struct Scsi_Host *shost);
165
166 #define aha1542_intr_reset(base) outb(IRST, CONTROL(base))
167
168 #define WAIT(port, mask, allof, noneof) \
169 { register int WAITbits; \
170 register int WAITtimeout = WAITnexttimeout; \
171 while (1) { \
172 WAITbits = inb(port) & (mask); \
173 if ((WAITbits & (allof)) == (allof) && ((WAITbits & (noneof)) == 0)) \
174 break; \
175 if (--WAITtimeout == 0) goto fail; \
176 } \
177 }
178
179 /* Similar to WAIT, except we use the udelay call to regulate the
180 amount of time we wait. */
181 #define WAITd(port, mask, allof, noneof, timeout) \
182 { register int WAITbits; \
183 register int WAITtimeout = timeout; \
184 while (1) { \
185 WAITbits = inb(port) & (mask); \
186 if ((WAITbits & (allof)) == (allof) && ((WAITbits & (noneof)) == 0)) \
187 break; \
188 mdelay(1); \
189 if (--WAITtimeout == 0) goto fail; \
190 } \
191 }
192
193 static void aha1542_stat(void)
194 {
195 /* int s = inb(STATUS), i = inb(INTRFLAGS);
196 printk("status=%x intrflags=%x\n", s, i, WAITnexttimeout-WAITtimeout); */
197 }
198
199 /* This is a bit complicated, but we need to make sure that an interrupt
200 routine does not send something out while we are in the middle of this.
201 Fortunately, it is only at boot time that multi-byte messages
202 are ever sent. */
203 static int aha1542_out(unsigned int base, unchar * cmdp, int len)
204 {
205 unsigned long flags = 0;
206 int got_lock;
207
208 if (len == 1) {
209 got_lock = 0;
210 while (1 == 1) {
211 WAIT(STATUS(base), CDF, 0, CDF);
212 spin_lock_irqsave(&aha1542_lock, flags);
213 if (inb(STATUS(base)) & CDF) {
214 spin_unlock_irqrestore(&aha1542_lock, flags);
215 continue;
216 }
217 outb(*cmdp, DATA(base));
218 spin_unlock_irqrestore(&aha1542_lock, flags);
219 return 0;
220 }
221 } else {
222 spin_lock_irqsave(&aha1542_lock, flags);
223 got_lock = 1;
224 while (len--) {
225 WAIT(STATUS(base), CDF, 0, CDF);
226 outb(*cmdp++, DATA(base));
227 }
228 spin_unlock_irqrestore(&aha1542_lock, flags);
229 }
230 return 0;
231 fail:
232 if (got_lock)
233 spin_unlock_irqrestore(&aha1542_lock, flags);
234 printk(KERN_ERR "aha1542_out failed(%d): ", len + 1);
235 aha1542_stat();
236 return 1;
237 }
238
239 /* Only used at boot time, so we do not need to worry about latency as much
240 here */
241
242 static int __init aha1542_in(unsigned int base, unchar * cmdp, int len)
243 {
244 unsigned long flags;
245
246 spin_lock_irqsave(&aha1542_lock, flags);
247 while (len--) {
248 WAIT(STATUS(base), DF, DF, 0);
249 *cmdp++ = inb(DATA(base));
250 }
251 spin_unlock_irqrestore(&aha1542_lock, flags);
252 return 0;
253 fail:
254 spin_unlock_irqrestore(&aha1542_lock, flags);
255 printk(KERN_ERR "aha1542_in failed(%d): ", len + 1);
256 aha1542_stat();
257 return 1;
258 }
259
260 /* Similar to aha1542_in, except that we wait a very short period of time.
261 We use this if we know the board is alive and awake, but we are not sure
262 if the board will respond to the command we are about to send or not */
263 static int __init aha1542_in1(unsigned int base, unchar * cmdp, int len)
264 {
265 unsigned long flags;
266
267 spin_lock_irqsave(&aha1542_lock, flags);
268 while (len--) {
269 WAITd(STATUS(base), DF, DF, 0, 100);
270 *cmdp++ = inb(DATA(base));
271 }
272 spin_unlock_irqrestore(&aha1542_lock, flags);
273 return 0;
274 fail:
275 spin_unlock_irqrestore(&aha1542_lock, flags);
276 return 1;
277 }
278
279 static int makecode(unsigned hosterr, unsigned scsierr)
280 {
281 switch (hosterr) {
282 case 0x0:
283 case 0xa: /* Linked command complete without error and linked normally */
284 case 0xb: /* Linked command complete without error, interrupt generated */
285 hosterr = 0;
286 break;
287
288 case 0x11: /* Selection time out-The initiator selection or target
289 reselection was not complete within the SCSI Time out period */
290 hosterr = DID_TIME_OUT;
291 break;
292
293 case 0x12: /* Data overrun/underrun-The target attempted to transfer more data
294 than was allocated by the Data Length field or the sum of the
295 Scatter / Gather Data Length fields. */
296
297 case 0x13: /* Unexpected bus free-The target dropped the SCSI BSY at an unexpected time. */
298
299 case 0x15: /* MBO command was not 00, 01 or 02-The first byte of the CB was
300 invalid. This usually indicates a software failure. */
301
302 case 0x16: /* Invalid CCB Operation Code-The first byte of the CCB was invalid.
303 This usually indicates a software failure. */
304
305 case 0x17: /* Linked CCB does not have the same LUN-A subsequent CCB of a set
306 of linked CCB's does not specify the same logical unit number as
307 the first. */
308 case 0x18: /* Invalid Target Direction received from Host-The direction of a
309 Target Mode CCB was invalid. */
310
311 case 0x19: /* Duplicate CCB Received in Target Mode-More than once CCB was
312 received to service data transfer between the same target LUN
313 and initiator SCSI ID in the same direction. */
314
315 case 0x1a: /* Invalid CCB or Segment List Parameter-A segment list with a zero
316 length segment or invalid segment list boundaries was received.
317 A CCB parameter was invalid. */
318 DEB(printk("Aha1542: %x %x\n", hosterr, scsierr));
319 hosterr = DID_ERROR; /* Couldn't find any better */
320 break;
321
322 case 0x14: /* Target bus phase sequence failure-An invalid bus phase or bus
323 phase sequence was requested by the target. The host adapter
324 will generate a SCSI Reset Condition, notifying the host with
325 a SCRD interrupt */
326 hosterr = DID_RESET;
327 break;
328 default:
329 printk(KERN_ERR "aha1542: makecode: unknown hoststatus %x\n", hosterr);
330 break;
331 }
332 return scsierr | (hosterr << 16);
333 }
334
335 static int __init aha1542_test_port(int bse, struct Scsi_Host *shpnt)
336 {
337 unchar inquiry_cmd[] = {CMD_INQUIRY};
338 unchar inquiry_result[4];
339 unchar *cmdp;
340 int len;
341 volatile int debug = 0;
342
343 /* Quick and dirty test for presence of the card. */
344 if (inb(STATUS(bse)) == 0xff)
345 return 0;
346
347 /* Reset the adapter. I ought to make a hard reset, but it's not really necessary */
348
349 /* DEB(printk("aha1542_test_port called \n")); */
350
351 /* In case some other card was probing here, reset interrupts */
352 aha1542_intr_reset(bse); /* reset interrupts, so they don't block */
353
354 outb(SRST | IRST /*|SCRST */ , CONTROL(bse));
355
356 mdelay(20); /* Wait a little bit for things to settle down. */
357
358 debug = 1;
359 /* Expect INIT and IDLE, any of the others are bad */
360 WAIT(STATUS(bse), STATMASK, INIT | IDLE, STST | DIAGF | INVDCMD | DF | CDF);
361
362 debug = 2;
363 /* Shouldn't have generated any interrupts during reset */
364 if (inb(INTRFLAGS(bse)) & INTRMASK)
365 goto fail;
366
367
368 /* Perform a host adapter inquiry instead so we do not need to set
369 up the mailboxes ahead of time */
370
371 aha1542_out(bse, inquiry_cmd, 1);
372
373 debug = 3;
374 len = 4;
375 cmdp = &inquiry_result[0];
376
377 while (len--) {
378 WAIT(STATUS(bse), DF, DF, 0);
379 *cmdp++ = inb(DATA(bse));
380 }
381
382 debug = 8;
383 /* Reading port should reset DF */
384 if (inb(STATUS(bse)) & DF)
385 goto fail;
386
387 debug = 9;
388 /* When HACC, command is completed, and we're though testing */
389 WAIT(INTRFLAGS(bse), HACC, HACC, 0);
390 /* now initialize adapter */
391
392 debug = 10;
393 /* Clear interrupts */
394 outb(IRST, CONTROL(bse));
395
396 debug = 11;
397
398 return debug; /* 1 = ok */
399 fail:
400 return 0; /* 0 = not ok */
401 }
402
403 /* A quick wrapper for do_aha1542_intr_handle to grab the spin lock */
404 static irqreturn_t do_aha1542_intr_handle(int dummy, void *dev_id)
405 {
406 unsigned long flags;
407 struct Scsi_Host *shost = dev_id;
408
409 spin_lock_irqsave(shost->host_lock, flags);
410 aha1542_intr_handle(shost);
411 spin_unlock_irqrestore(shost->host_lock, flags);
412 return IRQ_HANDLED;
413 }
414
415 /* A "high" level interrupt handler */
416 static void aha1542_intr_handle(struct Scsi_Host *shost)
417 {
418 void (*my_done) (Scsi_Cmnd *) = NULL;
419 int errstatus, mbi, mbo, mbistatus;
420 int number_serviced;
421 unsigned long flags;
422 Scsi_Cmnd *SCtmp;
423 int flag;
424 int needs_restart;
425 struct mailbox *mb;
426 struct ccb *ccb;
427
428 mb = HOSTDATA(shost)->mb;
429 ccb = HOSTDATA(shost)->ccb;
430
431 #ifdef DEBUG
432 {
433 flag = inb(INTRFLAGS(shost->io_port));
434 printk(KERN_DEBUG "aha1542_intr_handle: ");
435 if (!(flag & ANYINTR))
436 printk("no interrupt?");
437 if (flag & MBIF)
438 printk("MBIF ");
439 if (flag & MBOA)
440 printk("MBOF ");
441 if (flag & HACC)
442 printk("HACC ");
443 if (flag & SCRD)
444 printk("SCRD ");
445 printk("status %02x\n", inb(STATUS(shost->io_port)));
446 };
447 #endif
448 number_serviced = 0;
449 needs_restart = 0;
450
451 while (1 == 1) {
452 flag = inb(INTRFLAGS(shost->io_port));
453
454 /* Check for unusual interrupts. If any of these happen, we should
455 probably do something special, but for now just printing a message
456 is sufficient. A SCSI reset detected is something that we really
457 need to deal with in some way. */
458 if (flag & ~MBIF) {
459 if (flag & MBOA)
460 printk("MBOF ");
461 if (flag & HACC)
462 printk("HACC ");
463 if (flag & SCRD) {
464 needs_restart = 1;
465 printk("SCRD ");
466 }
467 }
468 aha1542_intr_reset(shost->io_port);
469
470 spin_lock_irqsave(&aha1542_lock, flags);
471 mbi = HOSTDATA(shost)->aha1542_last_mbi_used + 1;
472 if (mbi >= 2 * AHA1542_MAILBOXES)
473 mbi = AHA1542_MAILBOXES;
474
475 do {
476 if (mb[mbi].status != 0)
477 break;
478 mbi++;
479 if (mbi >= 2 * AHA1542_MAILBOXES)
480 mbi = AHA1542_MAILBOXES;
481 } while (mbi != HOSTDATA(shost)->aha1542_last_mbi_used);
482
483 if (mb[mbi].status == 0) {
484 spin_unlock_irqrestore(&aha1542_lock, flags);
485 /* Hmm, no mail. Must have read it the last time around */
486 if (!number_serviced && !needs_restart)
487 printk(KERN_WARNING "aha1542.c: interrupt received, but no mail.\n");
488 /* We detected a reset. Restart all pending commands for
489 devices that use the hard reset option */
490 if (needs_restart)
491 aha1542_restart(shost);
492 return;
493 };
494
495 mbo = (scsi2int(mb[mbi].ccbptr) - (SCSI_BUF_PA(&ccb[0]))) / sizeof(struct ccb);
496 mbistatus = mb[mbi].status;
497 mb[mbi].status = 0;
498 HOSTDATA(shost)->aha1542_last_mbi_used = mbi;
499 spin_unlock_irqrestore(&aha1542_lock, flags);
500
501 #ifdef DEBUG
502 {
503 if (ccb[mbo].tarstat | ccb[mbo].hastat)
504 printk(KERN_DEBUG "aha1542_command: returning %x (status %d)\n",
505 ccb[mbo].tarstat + ((int) ccb[mbo].hastat << 16), mb[mbi].status);
506 };
507 #endif
508
509 if (mbistatus == 3)
510 continue; /* Aborted command not found */
511
512 #ifdef DEBUG
513 printk(KERN_DEBUG "...done %d %d\n", mbo, mbi);
514 #endif
515
516 SCtmp = HOSTDATA(shost)->SCint[mbo];
517
518 if (!SCtmp || !SCtmp->scsi_done) {
519 printk(KERN_WARNING "aha1542_intr_handle: Unexpected interrupt\n");
520 printk(KERN_WARNING "tarstat=%x, hastat=%x idlun=%x ccb#=%d \n", ccb[mbo].tarstat,
521 ccb[mbo].hastat, ccb[mbo].idlun, mbo);
522 return;
523 }
524 my_done = SCtmp->scsi_done;
525 kfree(SCtmp->host_scribble);
526 SCtmp->host_scribble = NULL;
527 /* Fetch the sense data, and tuck it away, in the required slot. The
528 Adaptec automatically fetches it, and there is no guarantee that
529 we will still have it in the cdb when we come back */
530 if (ccb[mbo].tarstat == 2)
531 memcpy(SCtmp->sense_buffer, &ccb[mbo].cdb[ccb[mbo].cdblen],
532 SCSI_SENSE_BUFFERSIZE);
533
534
535 /* is there mail :-) */
536
537 /* more error checking left out here */
538 if (mbistatus != 1)
539 /* This is surely wrong, but I don't know what's right */
540 errstatus = makecode(ccb[mbo].hastat, ccb[mbo].tarstat);
541 else
542 errstatus = 0;
543
544 #ifdef DEBUG
545 if (errstatus)
546 printk(KERN_DEBUG "(aha1542 error:%x %x %x) ", errstatus,
547 ccb[mbo].hastat, ccb[mbo].tarstat);
548 #endif
549
550 if (ccb[mbo].tarstat == 2) {
551 #ifdef DEBUG
552 int i;
553 #endif
554 DEB(printk("aha1542_intr_handle: sense:"));
555 #ifdef DEBUG
556 for (i = 0; i < 12; i++)
557 printk("%02x ", ccb[mbo].cdb[ccb[mbo].cdblen + i]);
558 printk("\n");
559 #endif
560 /*
561 DEB(printk("aha1542_intr_handle: buf:"));
562 for (i = 0; i < bufflen; i++)
563 printk("%02x ", ((unchar *)buff)[i]);
564 printk("\n");
565 */
566 }
567 DEB(if (errstatus) printk("aha1542_intr_handle: returning %6x\n", errstatus));
568 SCtmp->result = errstatus;
569 HOSTDATA(shost)->SCint[mbo] = NULL; /* This effectively frees up the mailbox slot, as
570 far as queuecommand is concerned */
571 my_done(SCtmp);
572 number_serviced++;
573 };
574 }
575
576 static int aha1542_queuecommand(Scsi_Cmnd * SCpnt, void (*done) (Scsi_Cmnd *))
577 {
578 unchar ahacmd = CMD_START_SCSI;
579 unchar direction;
580 unchar *cmd = (unchar *) SCpnt->cmnd;
581 unchar target = SCpnt->device->id;
582 unchar lun = SCpnt->device->lun;
583 unsigned long flags;
584 int bufflen = scsi_bufflen(SCpnt);
585 int mbo;
586 struct mailbox *mb;
587 struct ccb *ccb;
588
589 DEB(int i);
590
591 mb = HOSTDATA(SCpnt->device->host)->mb;
592 ccb = HOSTDATA(SCpnt->device->host)->ccb;
593
594 DEB(if (target > 1) {
595 SCpnt->result = DID_TIME_OUT << 16;
596 done(SCpnt); return 0;
597 }
598 );
599
600 if (*cmd == REQUEST_SENSE) {
601 /* Don't do the command - we have the sense data already */
602 #if 0
603 /* scsi_request_sense() provides a buffer of size 256,
604 so there is no reason to expect equality */
605 if (bufflen != SCSI_SENSE_BUFFERSIZE)
606 printk(KERN_CRIT "aha1542: Wrong buffer length supplied "
607 "for request sense (%d)\n", bufflen);
608 #endif
609 SCpnt->result = 0;
610 done(SCpnt);
611 return 0;
612 }
613 #ifdef DEBUG
614 if (*cmd == READ_10 || *cmd == WRITE_10)
615 i = xscsi2int(cmd + 2);
616 else if (*cmd == READ_6 || *cmd == WRITE_6)
617 i = scsi2int(cmd + 2);
618 else
619 i = -1;
620 if (done)
621 printk(KERN_DEBUG "aha1542_queuecommand: dev %d cmd %02x pos %d len %d ", target, *cmd, i, bufflen);
622 else
623 printk(KERN_DEBUG "aha1542_command: dev %d cmd %02x pos %d len %d ", target, *cmd, i, bufflen);
624 aha1542_stat();
625 printk(KERN_DEBUG "aha1542_queuecommand: dumping scsi cmd:");
626 for (i = 0; i < SCpnt->cmd_len; i++)
627 printk("%02x ", cmd[i]);
628 printk("\n");
629 if (*cmd == WRITE_10 || *cmd == WRITE_6)
630 return 0; /* we are still testing, so *don't* write */
631 #endif
632 /* Use the outgoing mailboxes in a round-robin fashion, because this
633 is how the host adapter will scan for them */
634
635 spin_lock_irqsave(&aha1542_lock, flags);
636 mbo = HOSTDATA(SCpnt->device->host)->aha1542_last_mbo_used + 1;
637 if (mbo >= AHA1542_MAILBOXES)
638 mbo = 0;
639
640 do {
641 if (mb[mbo].status == 0 && HOSTDATA(SCpnt->device->host)->SCint[mbo] == NULL)
642 break;
643 mbo++;
644 if (mbo >= AHA1542_MAILBOXES)
645 mbo = 0;
646 } while (mbo != HOSTDATA(SCpnt->device->host)->aha1542_last_mbo_used);
647
648 if (mb[mbo].status || HOSTDATA(SCpnt->device->host)->SCint[mbo])
649 panic("Unable to find empty mailbox for aha1542.\n");
650
651 HOSTDATA(SCpnt->device->host)->SCint[mbo] = SCpnt; /* This will effectively prevent someone else from
652 screwing with this cdb. */
653
654 HOSTDATA(SCpnt->device->host)->aha1542_last_mbo_used = mbo;
655 spin_unlock_irqrestore(&aha1542_lock, flags);
656
657 #ifdef DEBUG
658 printk(KERN_DEBUG "Sending command (%d %x)...", mbo, done);
659 #endif
660
661 any2scsi(mb[mbo].ccbptr, SCSI_BUF_PA(&ccb[mbo])); /* This gets trashed for some reason */
662
663 memset(&ccb[mbo], 0, sizeof(struct ccb));
664
665 ccb[mbo].cdblen = SCpnt->cmd_len;
666
667 direction = 0;
668 if (*cmd == READ_10 || *cmd == READ_6)
669 direction = 8;
670 else if (*cmd == WRITE_10 || *cmd == WRITE_6)
671 direction = 16;
672
673 memcpy(ccb[mbo].cdb, cmd, ccb[mbo].cdblen);
674
675 if (bufflen) {
676 struct scatterlist *sg;
677 struct chain *cptr;
678 #ifdef DEBUG
679 unsigned char *ptr;
680 #endif
681 int i, sg_count = scsi_sg_count(SCpnt);
682 ccb[mbo].op = 2; /* SCSI Initiator Command w/scatter-gather */
683 SCpnt->host_scribble = kmalloc(sizeof(*cptr)*sg_count,
684 GFP_KERNEL | GFP_DMA);
685 cptr = (struct chain *) SCpnt->host_scribble;
686 if (cptr == NULL) {
687 /* free the claimed mailbox slot */
688 HOSTDATA(SCpnt->device->host)->SCint[mbo] = NULL;
689 return SCSI_MLQUEUE_HOST_BUSY;
690 }
691 scsi_for_each_sg(SCpnt, sg, sg_count, i) {
692 any2scsi(cptr[i].dataptr, SCSI_SG_PA(sg));
693 if (SCSI_SG_PA(sg) + sg->length - 1 > ISA_DMA_THRESHOLD)
694 BAD_SG_DMA(SCpnt, scsi_sglist(SCpnt), sg_count, i);
695 any2scsi(cptr[i].datalen, sg->length);
696 };
697 any2scsi(ccb[mbo].datalen, sg_count * sizeof(struct chain));
698 any2scsi(ccb[mbo].dataptr, SCSI_BUF_PA(cptr));
699 #ifdef DEBUG
700 printk("cptr %x: ", cptr);
701 ptr = (unsigned char *) cptr;
702 for (i = 0; i < 18; i++)
703 printk("%02x ", ptr[i]);
704 #endif
705 } else {
706 ccb[mbo].op = 0; /* SCSI Initiator Command */
707 SCpnt->host_scribble = NULL;
708 any2scsi(ccb[mbo].datalen, 0);
709 any2scsi(ccb[mbo].dataptr, 0);
710 };
711 ccb[mbo].idlun = (target & 7) << 5 | direction | (lun & 7); /*SCSI Target Id */
712 ccb[mbo].rsalen = 16;
713 ccb[mbo].linkptr[0] = ccb[mbo].linkptr[1] = ccb[mbo].linkptr[2] = 0;
714 ccb[mbo].commlinkid = 0;
715
716 #ifdef DEBUG
717 {
718 int i;
719 printk(KERN_DEBUG "aha1542_command: sending.. ");
720 for (i = 0; i < sizeof(ccb[mbo]) - 10; i++)
721 printk("%02x ", ((unchar *) & ccb[mbo])[i]);
722 };
723 #endif
724
725 if (done) {
726 DEB(printk("aha1542_queuecommand: now waiting for interrupt ");
727 aha1542_stat());
728 SCpnt->scsi_done = done;
729 mb[mbo].status = 1;
730 aha1542_out(SCpnt->device->host->io_port, &ahacmd, 1); /* start scsi command */
731 DEB(aha1542_stat());
732 } else
733 printk("aha1542_queuecommand: done can't be NULL\n");
734
735 return 0;
736 }
737
738 /* Initialize mailboxes */
739 static void setup_mailboxes(int bse, struct Scsi_Host *shpnt)
740 {
741 int i;
742 struct mailbox *mb;
743 struct ccb *ccb;
744
745 unchar cmd[5] = { CMD_MBINIT, AHA1542_MAILBOXES, 0, 0, 0};
746
747 mb = HOSTDATA(shpnt)->mb;
748 ccb = HOSTDATA(shpnt)->ccb;
749
750 for (i = 0; i < AHA1542_MAILBOXES; i++) {
751 mb[i].status = mb[AHA1542_MAILBOXES + i].status = 0;
752 any2scsi(mb[i].ccbptr, SCSI_BUF_PA(&ccb[i]));
753 };
754 aha1542_intr_reset(bse); /* reset interrupts, so they don't block */
755 any2scsi((cmd + 2), SCSI_BUF_PA(mb));
756 aha1542_out(bse, cmd, 5);
757 WAIT(INTRFLAGS(bse), INTRMASK, HACC, 0);
758 while (0) {
759 fail:
760 printk(KERN_ERR "aha1542_detect: failed setting up mailboxes\n");
761 }
762 aha1542_intr_reset(bse);
763 }
764
765 static int __init aha1542_getconfig(int base_io, unsigned char *irq_level, unsigned char *dma_chan, unsigned char *scsi_id)
766 {
767 unchar inquiry_cmd[] = {CMD_RETCONF};
768 unchar inquiry_result[3];
769 int i;
770 i = inb(STATUS(base_io));
771 if (i & DF) {
772 i = inb(DATA(base_io));
773 };
774 aha1542_out(base_io, inquiry_cmd, 1);
775 aha1542_in(base_io, inquiry_result, 3);
776 WAIT(INTRFLAGS(base_io), INTRMASK, HACC, 0);
777 while (0) {
778 fail:
779 printk(KERN_ERR "aha1542_detect: query board settings\n");
780 }
781 aha1542_intr_reset(base_io);
782 switch (inquiry_result[0]) {
783 case 0x80:
784 *dma_chan = 7;
785 break;
786 case 0x40:
787 *dma_chan = 6;
788 break;
789 case 0x20:
790 *dma_chan = 5;
791 break;
792 case 0x01:
793 *dma_chan = 0;
794 break;
795 case 0:
796 /* This means that the adapter, although Adaptec 1542 compatible, doesn't use a DMA channel.
797 Currently only aware of the BusLogic BT-445S VL-Bus adapter which needs this. */
798 *dma_chan = 0xFF;
799 break;
800 default:
801 printk(KERN_ERR "Unable to determine Adaptec DMA priority. Disabling board\n");
802 return -1;
803 };
804 switch (inquiry_result[1]) {
805 case 0x40:
806 *irq_level = 15;
807 break;
808 case 0x20:
809 *irq_level = 14;
810 break;
811 case 0x8:
812 *irq_level = 12;
813 break;
814 case 0x4:
815 *irq_level = 11;
816 break;
817 case 0x2:
818 *irq_level = 10;
819 break;
820 case 0x1:
821 *irq_level = 9;
822 break;
823 default:
824 printk(KERN_ERR "Unable to determine Adaptec IRQ level. Disabling board\n");
825 return -1;
826 };
827 *scsi_id = inquiry_result[2] & 7;
828 return 0;
829 }
830
831 /* This function should only be called for 1542C boards - we can detect
832 the special firmware settings and unlock the board */
833
834 static int __init aha1542_mbenable(int base)
835 {
836 static unchar mbenable_cmd[3];
837 static unchar mbenable_result[2];
838 int retval;
839
840 retval = BIOS_TRANSLATION_6432;
841
842 mbenable_cmd[0] = CMD_EXTBIOS;
843 aha1542_out(base, mbenable_cmd, 1);
844 if (aha1542_in1(base, mbenable_result, 2))
845 return retval;
846 WAITd(INTRFLAGS(base), INTRMASK, HACC, 0, 100);
847 aha1542_intr_reset(base);
848
849 if ((mbenable_result[0] & 0x08) || mbenable_result[1]) {
850 mbenable_cmd[0] = CMD_MBENABLE;
851 mbenable_cmd[1] = 0;
852 mbenable_cmd[2] = mbenable_result[1];
853
854 if ((mbenable_result[0] & 0x08) && (mbenable_result[1] & 0x03))
855 retval = BIOS_TRANSLATION_25563;
856
857 aha1542_out(base, mbenable_cmd, 3);
858 WAIT(INTRFLAGS(base), INTRMASK, HACC, 0);
859 };
860 while (0) {
861 fail:
862 printk(KERN_ERR "aha1542_mbenable: Mailbox init failed\n");
863 }
864 aha1542_intr_reset(base);
865 return retval;
866 }
867
868 /* Query the board to find out if it is a 1542 or a 1740, or whatever. */
869 static int __init aha1542_query(int base_io, int *transl)
870 {
871 unchar inquiry_cmd[] = {CMD_INQUIRY};
872 unchar inquiry_result[4];
873 int i;
874 i = inb(STATUS(base_io));
875 if (i & DF) {
876 i = inb(DATA(base_io));
877 };
878 aha1542_out(base_io, inquiry_cmd, 1);
879 aha1542_in(base_io, inquiry_result, 4);
880 WAIT(INTRFLAGS(base_io), INTRMASK, HACC, 0);
881 while (0) {
882 fail:
883 printk(KERN_ERR "aha1542_detect: query card type\n");
884 }
885 aha1542_intr_reset(base_io);
886
887 *transl = BIOS_TRANSLATION_6432; /* Default case */
888
889 /* For an AHA1740 series board, we ignore the board since there is a
890 hardware bug which can lead to wrong blocks being returned if the board
891 is operating in the 1542 emulation mode. Since there is an extended mode
892 driver, we simply ignore the board and let the 1740 driver pick it up.
893 */
894
895 if (inquiry_result[0] == 0x43) {
896 printk(KERN_INFO "aha1542.c: Emulation mode not supported for AHA 174N hardware.\n");
897 return 1;
898 };
899
900 /* Always call this - boards that do not support extended bios translation
901 will ignore the command, and we will set the proper default */
902
903 *transl = aha1542_mbenable(base_io);
904
905 return 0;
906 }
907
908 #ifndef MODULE
909 static char *setup_str[MAXBOARDS] __initdata;
910 static int setup_idx = 0;
911
912 static void __init aha1542_setup(char *str, int *ints)
913 {
914 const char *ahausage = "aha1542: usage: aha1542=<PORTBASE>[,<BUSON>,<BUSOFF>[,<DMASPEED>]]\n";
915 int setup_portbase;
916
917 if (setup_idx >= MAXBOARDS) {
918 printk(KERN_ERR "aha1542: aha1542_setup called too many times! Bad LILO params ?\n");
919 printk(KERN_ERR " Entryline 1: %s\n", setup_str[0]);
920 printk(KERN_ERR " Entryline 2: %s\n", setup_str[1]);
921 printk(KERN_ERR " This line: %s\n", str);
922 return;
923 }
924 if (ints[0] < 1 || ints[0] > 4) {
925 printk(KERN_ERR "aha1542: %s\n", str);
926 printk(ahausage);
927 printk(KERN_ERR "aha1542: Wrong parameters may cause system malfunction.. We try anyway..\n");
928 }
929 setup_called[setup_idx] = ints[0];
930 setup_str[setup_idx] = str;
931
932 setup_portbase = ints[0] >= 1 ? ints[1] : 0; /* Preserve the default value.. */
933 setup_buson[setup_idx] = ints[0] >= 2 ? ints[2] : 7;
934 setup_busoff[setup_idx] = ints[0] >= 3 ? ints[3] : 5;
935 if (ints[0] >= 4)
936 {
937 int atbt = -1;
938 switch (ints[4]) {
939 case 5:
940 atbt = 0x00;
941 break;
942 case 6:
943 atbt = 0x04;
944 break;
945 case 7:
946 atbt = 0x01;
947 break;
948 case 8:
949 atbt = 0x02;
950 break;
951 case 10:
952 atbt = 0x03;
953 break;
954 default:
955 printk(KERN_ERR "aha1542: %s\n", str);
956 printk(ahausage);
957 printk(KERN_ERR "aha1542: Valid values for DMASPEED are 5-8, 10 MB/s. Using jumper defaults.\n");
958 break;
959 }
960 setup_dmaspeed[setup_idx] = atbt;
961 }
962 if (setup_portbase != 0)
963 bases[setup_idx] = setup_portbase;
964
965 ++setup_idx;
966 }
967
968 static int __init do_setup(char *str)
969 {
970 int ints[5];
971
972 int count=setup_idx;
973
974 get_options(str, ARRAY_SIZE(ints), ints);
975 aha1542_setup(str,ints);
976
977 return count<setup_idx;
978 }
979
980 __setup("aha1542=",do_setup);
981 #endif
982
983 /* return non-zero on detection */
984 static int __init aha1542_detect(struct scsi_host_template * tpnt)
985 {
986 unsigned char dma_chan;
987 unsigned char irq_level;
988 unsigned char scsi_id;
989 unsigned long flags;
990 unsigned int base_io;
991 int trans;
992 struct Scsi_Host *shpnt = NULL;
993 int count = 0;
994 int indx;
995
996 DEB(printk("aha1542_detect: \n"));
997
998 tpnt->proc_name = "aha1542";
999
1000 #ifdef MODULE
1001 bases[0] = aha1542[0];
1002 setup_buson[0] = aha1542[1];
1003 setup_busoff[0] = aha1542[2];
1004 {
1005 int atbt = -1;
1006 switch (aha1542[3]) {
1007 case 5:
1008 atbt = 0x00;
1009 break;
1010 case 6:
1011 atbt = 0x04;
1012 break;
1013 case 7:
1014 atbt = 0x01;
1015 break;
1016 case 8:
1017 atbt = 0x02;
1018 break;
1019 case 10:
1020 atbt = 0x03;
1021 break;
1022 };
1023 setup_dmaspeed[0] = atbt;
1024 }
1025 #endif
1026
1027 /*
1028 * Find MicroChannel cards (AHA1640)
1029 */
1030 #ifdef CONFIG_MCA_LEGACY
1031 if(MCA_bus) {
1032 int slot = 0;
1033 int pos = 0;
1034
1035 for (indx = 0; (slot != MCA_NOTFOUND) && (indx < ARRAY_SIZE(bases)); indx++) {
1036
1037 if (bases[indx])
1038 continue;
1039
1040 /* Detect only AHA-1640 cards -- MCA ID 0F1F */
1041 slot = mca_find_unused_adapter(0x0f1f, slot);
1042 if (slot == MCA_NOTFOUND)
1043 break;
1044
1045 /* Found one */
1046 pos = mca_read_stored_pos(slot, 3);
1047
1048 /* Decode address */
1049 if (pos & 0x80) {
1050 if (pos & 0x02) {
1051 if (pos & 0x01)
1052 bases[indx] = 0x334;
1053 else
1054 bases[indx] = 0x234;
1055 } else {
1056 if (pos & 0x01)
1057 bases[indx] = 0x134;
1058 }
1059 } else {
1060 if (pos & 0x02) {
1061 if (pos & 0x01)
1062 bases[indx] = 0x330;
1063 else
1064 bases[indx] = 0x230;
1065 } else {
1066 if (pos & 0x01)
1067 bases[indx] = 0x130;
1068 }
1069 }
1070
1071 /* No need to decode IRQ and Arb level -- those are
1072 * read off the card later.
1073 */
1074 printk(KERN_INFO "Found an AHA-1640 in MCA slot %d, I/O 0x%04x\n", slot, bases[indx]);
1075
1076 mca_set_adapter_name(slot, "Adapter AHA-1640");
1077 mca_set_adapter_procfn(slot, NULL, NULL);
1078 mca_mark_as_used(slot);
1079
1080 /* Go on */
1081 slot++;
1082 }
1083
1084 }
1085 #endif
1086
1087 /*
1088 * Hunt for ISA Plug'n'Pray Adaptecs (AHA1535)
1089 */
1090
1091 if(isapnp)
1092 {
1093 struct pnp_dev *pdev = NULL;
1094 for(indx = 0; indx < ARRAY_SIZE(bases); indx++) {
1095 if(bases[indx])
1096 continue;
1097 pdev = pnp_find_dev(NULL, ISAPNP_VENDOR('A', 'D', 'P'),
1098 ISAPNP_FUNCTION(0x1542), pdev);
1099 if(pdev==NULL)
1100 break;
1101 /*
1102 * Activate the PnP card
1103 */
1104
1105 if(pnp_device_attach(pdev)<0)
1106 continue;
1107
1108 if(pnp_activate_dev(pdev)<0) {
1109 pnp_device_detach(pdev);
1110 continue;
1111 }
1112
1113 if(!pnp_port_valid(pdev, 0)) {
1114 pnp_device_detach(pdev);
1115 continue;
1116 }
1117
1118 bases[indx] = pnp_port_start(pdev, 0);
1119
1120 /* The card can be queried for its DMA, we have
1121 the DMA set up that is enough */
1122
1123 printk(KERN_INFO "ISAPnP found an AHA1535 at I/O 0x%03X\n", bases[indx]);
1124 }
1125 }
1126 for (indx = 0; indx < ARRAY_SIZE(bases); indx++)
1127 if (bases[indx] != 0 && request_region(bases[indx], 4, "aha1542")) {
1128 shpnt = scsi_register(tpnt,
1129 sizeof(struct aha1542_hostdata));
1130
1131 if(shpnt==NULL) {
1132 release_region(bases[indx], 4);
1133 continue;
1134 }
1135 /* For now we do this - until kmalloc is more intelligent
1136 we are resigned to stupid hacks like this */
1137 if (SCSI_BUF_PA(shpnt) >= ISA_DMA_THRESHOLD) {
1138 printk(KERN_ERR "Invalid address for shpnt with 1542.\n");
1139 goto unregister;
1140 }
1141 if (!aha1542_test_port(bases[indx], shpnt))
1142 goto unregister;
1143
1144
1145 base_io = bases[indx];
1146
1147 /* Set the Bus on/off-times as not to ruin floppy performance */
1148 {
1149 unchar oncmd[] = {CMD_BUSON_TIME, 7};
1150 unchar offcmd[] = {CMD_BUSOFF_TIME, 5};
1151
1152 if (setup_called[indx]) {
1153 oncmd[1] = setup_buson[indx];
1154 offcmd[1] = setup_busoff[indx];
1155 }
1156 aha1542_intr_reset(base_io);
1157 aha1542_out(base_io, oncmd, 2);
1158 WAIT(INTRFLAGS(base_io), INTRMASK, HACC, 0);
1159 aha1542_intr_reset(base_io);
1160 aha1542_out(base_io, offcmd, 2);
1161 WAIT(INTRFLAGS(base_io), INTRMASK, HACC, 0);
1162 if (setup_dmaspeed[indx] >= 0) {
1163 unchar dmacmd[] = {CMD_DMASPEED, 0};
1164 dmacmd[1] = setup_dmaspeed[indx];
1165 aha1542_intr_reset(base_io);
1166 aha1542_out(base_io, dmacmd, 2);
1167 WAIT(INTRFLAGS(base_io), INTRMASK, HACC, 0);
1168 }
1169 while (0) {
1170 fail:
1171 printk(KERN_ERR "aha1542_detect: setting bus on/off-time failed\n");
1172 }
1173 aha1542_intr_reset(base_io);
1174 }
1175 if (aha1542_query(base_io, &trans))
1176 goto unregister;
1177
1178 if (aha1542_getconfig(base_io, &irq_level, &dma_chan, &scsi_id) == -1)
1179 goto unregister;
1180
1181 printk(KERN_INFO "Configuring Adaptec (SCSI-ID %d) at IO:%x, IRQ %d", scsi_id, base_io, irq_level);
1182 if (dma_chan != 0xFF)
1183 printk(", DMA priority %d", dma_chan);
1184 printk("\n");
1185
1186 DEB(aha1542_stat());
1187 setup_mailboxes(base_io, shpnt);
1188
1189 DEB(aha1542_stat());
1190
1191 DEB(printk("aha1542_detect: enable interrupt channel %d\n", irq_level));
1192 spin_lock_irqsave(&aha1542_lock, flags);
1193 if (request_irq(irq_level, do_aha1542_intr_handle, 0,
1194 "aha1542", shpnt)) {
1195 printk(KERN_ERR "Unable to allocate IRQ for adaptec controller.\n");
1196 spin_unlock_irqrestore(&aha1542_lock, flags);
1197 goto unregister;
1198 }
1199 if (dma_chan != 0xFF) {
1200 if (request_dma(dma_chan, "aha1542")) {
1201 printk(KERN_ERR "Unable to allocate DMA channel for Adaptec.\n");
1202 free_irq(irq_level, shpnt);
1203 spin_unlock_irqrestore(&aha1542_lock, flags);
1204 goto unregister;
1205 }
1206 if (dma_chan == 0 || dma_chan >= 5) {
1207 set_dma_mode(dma_chan, DMA_MODE_CASCADE);
1208 enable_dma(dma_chan);
1209 }
1210 }
1211
1212 shpnt->this_id = scsi_id;
1213 shpnt->unique_id = base_io;
1214 shpnt->io_port = base_io;
1215 shpnt->n_io_port = 4; /* Number of bytes of I/O space used */
1216 shpnt->dma_channel = dma_chan;
1217 shpnt->irq = irq_level;
1218 HOSTDATA(shpnt)->bios_translation = trans;
1219 if (trans == BIOS_TRANSLATION_25563)
1220 printk(KERN_INFO "aha1542.c: Using extended bios translation\n");
1221 HOSTDATA(shpnt)->aha1542_last_mbi_used = (2 * AHA1542_MAILBOXES - 1);
1222 HOSTDATA(shpnt)->aha1542_last_mbo_used = (AHA1542_MAILBOXES - 1);
1223 memset(HOSTDATA(shpnt)->SCint, 0, sizeof(HOSTDATA(shpnt)->SCint));
1224 spin_unlock_irqrestore(&aha1542_lock, flags);
1225 #if 0
1226 DEB(printk(" *** READ CAPACITY ***\n"));
1227
1228 {
1229 unchar buf[8];
1230 static unchar cmd[] = { READ_CAPACITY, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
1231 int i;
1232
1233 for (i = 0; i < sizeof(buf); ++i)
1234 buf[i] = 0x87;
1235 for (i = 0; i < 2; ++i)
1236 if (!aha1542_command(i, cmd, buf, sizeof(buf))) {
1237 printk(KERN_DEBUG "aha_detect: LU %d sector_size %d device_size %d\n",
1238 i, xscsi2int(buf + 4), xscsi2int(buf));
1239 }
1240 }
1241
1242 DEB(printk(" *** NOW RUNNING MY OWN TEST *** \n"));
1243
1244 for (i = 0; i < 4; ++i) {
1245 unsigned char cmd[10];
1246 static buffer[512];
1247
1248 cmd[0] = READ_10;
1249 cmd[1] = 0;
1250 xany2scsi(cmd + 2, i);
1251 cmd[6] = 0;
1252 cmd[7] = 0;
1253 cmd[8] = 1;
1254 cmd[9] = 0;
1255 aha1542_command(0, cmd, buffer, 512);
1256 }
1257 #endif
1258 count++;
1259 continue;
1260 unregister:
1261 release_region(bases[indx], 4);
1262 scsi_unregister(shpnt);
1263 continue;
1264
1265 };
1266
1267 return count;
1268 }
1269
1270 static int aha1542_release(struct Scsi_Host *shost)
1271 {
1272 if (shost->irq)
1273 free_irq(shost->irq, shost);
1274 if (shost->dma_channel != 0xff)
1275 free_dma(shost->dma_channel);
1276 if (shost->io_port && shost->n_io_port)
1277 release_region(shost->io_port, shost->n_io_port);
1278 scsi_unregister(shost);
1279 return 0;
1280 }
1281
1282 static int aha1542_restart(struct Scsi_Host *shost)
1283 {
1284 int i;
1285 int count = 0;
1286 #if 0
1287 unchar ahacmd = CMD_START_SCSI;
1288 #endif
1289
1290 for (i = 0; i < AHA1542_MAILBOXES; i++)
1291 if (HOSTDATA(shost)->SCint[i] &&
1292 !(HOSTDATA(shost)->SCint[i]->device->soft_reset)) {
1293 #if 0
1294 HOSTDATA(shost)->mb[i].status = 1; /* Indicate ready to restart... */
1295 #endif
1296 count++;
1297 }
1298 printk(KERN_DEBUG "Potential to restart %d stalled commands...\n", count);
1299 #if 0
1300 /* start scsi command */
1301 if (count)
1302 aha1542_out(shost->io_port, &ahacmd, 1);
1303 #endif
1304 return 0;
1305 }
1306
1307 /*
1308 * This is a device reset. This is handled by sending a special command
1309 * to the device.
1310 */
1311 static int aha1542_dev_reset(Scsi_Cmnd * SCpnt)
1312 {
1313 unsigned long flags;
1314 struct mailbox *mb;
1315 unchar target = SCpnt->device->id;
1316 unchar lun = SCpnt->device->lun;
1317 int mbo;
1318 struct ccb *ccb;
1319 unchar ahacmd = CMD_START_SCSI;
1320
1321 ccb = HOSTDATA(SCpnt->device->host)->ccb;
1322 mb = HOSTDATA(SCpnt->device->host)->mb;
1323
1324 spin_lock_irqsave(&aha1542_lock, flags);
1325 mbo = HOSTDATA(SCpnt->device->host)->aha1542_last_mbo_used + 1;
1326 if (mbo >= AHA1542_MAILBOXES)
1327 mbo = 0;
1328
1329 do {
1330 if (mb[mbo].status == 0 && HOSTDATA(SCpnt->device->host)->SCint[mbo] == NULL)
1331 break;
1332 mbo++;
1333 if (mbo >= AHA1542_MAILBOXES)
1334 mbo = 0;
1335 } while (mbo != HOSTDATA(SCpnt->device->host)->aha1542_last_mbo_used);
1336
1337 if (mb[mbo].status || HOSTDATA(SCpnt->device->host)->SCint[mbo])
1338 panic("Unable to find empty mailbox for aha1542.\n");
1339
1340 HOSTDATA(SCpnt->device->host)->SCint[mbo] = SCpnt; /* This will effectively
1341 prevent someone else from
1342 screwing with this cdb. */
1343
1344 HOSTDATA(SCpnt->device->host)->aha1542_last_mbo_used = mbo;
1345 spin_unlock_irqrestore(&aha1542_lock, flags);
1346
1347 any2scsi(mb[mbo].ccbptr, SCSI_BUF_PA(&ccb[mbo])); /* This gets trashed for some reason */
1348
1349 memset(&ccb[mbo], 0, sizeof(struct ccb));
1350
1351 ccb[mbo].op = 0x81; /* BUS DEVICE RESET */
1352
1353 ccb[mbo].idlun = (target & 7) << 5 | (lun & 7); /*SCSI Target Id */
1354
1355 ccb[mbo].linkptr[0] = ccb[mbo].linkptr[1] = ccb[mbo].linkptr[2] = 0;
1356 ccb[mbo].commlinkid = 0;
1357
1358 /*
1359 * Now tell the 1542 to flush all pending commands for this
1360 * target
1361 */
1362 aha1542_out(SCpnt->device->host->io_port, &ahacmd, 1);
1363
1364 scmd_printk(KERN_WARNING, SCpnt,
1365 "Trying device reset for target\n");
1366
1367 return SUCCESS;
1368
1369
1370 #ifdef ERIC_neverdef
1371 /*
1372 * With the 1542 we apparently never get an interrupt to
1373 * acknowledge a device reset being sent. Then again, Leonard
1374 * says we are doing this wrong in the first place...
1375 *
1376 * Take a wait and see attitude. If we get spurious interrupts,
1377 * then the device reset is doing something sane and useful, and
1378 * we will wait for the interrupt to post completion.
1379 */
1380 printk(KERN_WARNING "Sent BUS DEVICE RESET to target %d\n", SCpnt->target);
1381
1382 /*
1383 * Free the command block for all commands running on this
1384 * target...
1385 */
1386 for (i = 0; i < AHA1542_MAILBOXES; i++) {
1387 if (HOSTDATA(SCpnt->host)->SCint[i] &&
1388 HOSTDATA(SCpnt->host)->SCint[i]->target == SCpnt->target) {
1389 Scsi_Cmnd *SCtmp;
1390 SCtmp = HOSTDATA(SCpnt->host)->SCint[i];
1391 kfree(SCtmp->host_scribble);
1392 SCtmp->host_scribble = NULL;
1393 HOSTDATA(SCpnt->host)->SCint[i] = NULL;
1394 HOSTDATA(SCpnt->host)->mb[i].status = 0;
1395 }
1396 }
1397 return SUCCESS;
1398
1399 return FAILED;
1400 #endif /* ERIC_neverdef */
1401 }
1402
1403 static int aha1542_bus_reset(Scsi_Cmnd * SCpnt)
1404 {
1405 int i;
1406
1407 /*
1408 * This does a scsi reset for all devices on the bus.
1409 * In principle, we could also reset the 1542 - should
1410 * we do this? Try this first, and we can add that later
1411 * if it turns out to be useful.
1412 */
1413 outb(SCRST, CONTROL(SCpnt->device->host->io_port));
1414
1415 /*
1416 * Wait for the thing to settle down a bit. Unfortunately
1417 * this is going to basically lock up the machine while we
1418 * wait for this to complete. To be 100% correct, we need to
1419 * check for timeout, and if we are doing something like this
1420 * we are pretty desperate anyways.
1421 */
1422 ssleep(4);
1423
1424 spin_lock_irq(SCpnt->device->host->host_lock);
1425
1426 WAIT(STATUS(SCpnt->device->host->io_port),
1427 STATMASK, INIT | IDLE, STST | DIAGF | INVDCMD | DF | CDF);
1428
1429 /*
1430 * Now try to pick up the pieces. For all pending commands,
1431 * free any internal data structures, and basically clear things
1432 * out. We do not try and restart any commands or anything -
1433 * the strategy handler takes care of that crap.
1434 */
1435 printk(KERN_WARNING "Sent BUS RESET to scsi host %d\n", SCpnt->device->host->host_no);
1436
1437 for (i = 0; i < AHA1542_MAILBOXES; i++) {
1438 if (HOSTDATA(SCpnt->device->host)->SCint[i] != NULL) {
1439 Scsi_Cmnd *SCtmp;
1440 SCtmp = HOSTDATA(SCpnt->device->host)->SCint[i];
1441
1442
1443 if (SCtmp->device->soft_reset) {
1444 /*
1445 * If this device implements the soft reset option,
1446 * then it is still holding onto the command, and
1447 * may yet complete it. In this case, we don't
1448 * flush the data.
1449 */
1450 continue;
1451 }
1452 kfree(SCtmp->host_scribble);
1453 SCtmp->host_scribble = NULL;
1454 HOSTDATA(SCpnt->device->host)->SCint[i] = NULL;
1455 HOSTDATA(SCpnt->device->host)->mb[i].status = 0;
1456 }
1457 }
1458
1459 spin_unlock_irq(SCpnt->device->host->host_lock);
1460 return SUCCESS;
1461
1462 fail:
1463 spin_unlock_irq(SCpnt->device->host->host_lock);
1464 return FAILED;
1465 }
1466
1467 static int aha1542_host_reset(Scsi_Cmnd * SCpnt)
1468 {
1469 int i;
1470
1471 /*
1472 * This does a scsi reset for all devices on the bus.
1473 * In principle, we could also reset the 1542 - should
1474 * we do this? Try this first, and we can add that later
1475 * if it turns out to be useful.
1476 */
1477 outb(HRST | SCRST, CONTROL(SCpnt->device->host->io_port));
1478
1479 /*
1480 * Wait for the thing to settle down a bit. Unfortunately
1481 * this is going to basically lock up the machine while we
1482 * wait for this to complete. To be 100% correct, we need to
1483 * check for timeout, and if we are doing something like this
1484 * we are pretty desperate anyways.
1485 */
1486 ssleep(4);
1487 spin_lock_irq(SCpnt->device->host->host_lock);
1488
1489 WAIT(STATUS(SCpnt->device->host->io_port),
1490 STATMASK, INIT | IDLE, STST | DIAGF | INVDCMD | DF | CDF);
1491
1492 /*
1493 * We need to do this too before the 1542 can interact with
1494 * us again.
1495 */
1496 setup_mailboxes(SCpnt->device->host->io_port, SCpnt->device->host);
1497
1498 /*
1499 * Now try to pick up the pieces. For all pending commands,
1500 * free any internal data structures, and basically clear things
1501 * out. We do not try and restart any commands or anything -
1502 * the strategy handler takes care of that crap.
1503 */
1504 printk(KERN_WARNING "Sent BUS RESET to scsi host %d\n", SCpnt->device->host->host_no);
1505
1506 for (i = 0; i < AHA1542_MAILBOXES; i++) {
1507 if (HOSTDATA(SCpnt->device->host)->SCint[i] != NULL) {
1508 Scsi_Cmnd *SCtmp;
1509 SCtmp = HOSTDATA(SCpnt->device->host)->SCint[i];
1510
1511 if (SCtmp->device->soft_reset) {
1512 /*
1513 * If this device implements the soft reset option,
1514 * then it is still holding onto the command, and
1515 * may yet complete it. In this case, we don't
1516 * flush the data.
1517 */
1518 continue;
1519 }
1520 kfree(SCtmp->host_scribble);
1521 SCtmp->host_scribble = NULL;
1522 HOSTDATA(SCpnt->device->host)->SCint[i] = NULL;
1523 HOSTDATA(SCpnt->device->host)->mb[i].status = 0;
1524 }
1525 }
1526
1527 spin_unlock_irq(SCpnt->device->host->host_lock);
1528 return SUCCESS;
1529
1530 fail:
1531 spin_unlock_irq(SCpnt->device->host->host_lock);
1532 return FAILED;
1533 }
1534
1535 #if 0
1536 /*
1537 * These are the old error handling routines. They are only temporarily
1538 * here while we play with the new error handling code.
1539 */
1540 static int aha1542_old_abort(Scsi_Cmnd * SCpnt)
1541 {
1542 #if 0
1543 unchar ahacmd = CMD_START_SCSI;
1544 unsigned long flags;
1545 struct mailbox *mb;
1546 int mbi, mbo, i;
1547
1548 printk(KERN_DEBUG "In aha1542_abort: %x %x\n",
1549 inb(STATUS(SCpnt->host->io_port)),
1550 inb(INTRFLAGS(SCpnt->host->io_port)));
1551
1552 spin_lock_irqsave(&aha1542_lock, flags);
1553 mb = HOSTDATA(SCpnt->host)->mb;
1554 mbi = HOSTDATA(SCpnt->host)->aha1542_last_mbi_used + 1;
1555 if (mbi >= 2 * AHA1542_MAILBOXES)
1556 mbi = AHA1542_MAILBOXES;
1557
1558 do {
1559 if (mb[mbi].status != 0)
1560 break;
1561 mbi++;
1562 if (mbi >= 2 * AHA1542_MAILBOXES)
1563 mbi = AHA1542_MAILBOXES;
1564 } while (mbi != HOSTDATA(SCpnt->host)->aha1542_last_mbi_used);
1565 spin_unlock_irqrestore(&aha1542_lock, flags);
1566
1567 if (mb[mbi].status) {
1568 printk(KERN_ERR "Lost interrupt discovered on irq %d - attempting to recover\n",
1569 SCpnt->host->irq);
1570 aha1542_intr_handle(SCpnt->host, NULL);
1571 return 0;
1572 }
1573 /* OK, no lost interrupt. Try looking to see how many pending commands
1574 we think we have. */
1575
1576 for (i = 0; i < AHA1542_MAILBOXES; i++)
1577 if (HOSTDATA(SCpnt->host)->SCint[i]) {
1578 if (HOSTDATA(SCpnt->host)->SCint[i] == SCpnt) {
1579 printk(KERN_ERR "Timed out command pending for %s\n",
1580 SCpnt->request->rq_disk ?
1581 SCpnt->request->rq_disk->disk_name : "?"
1582 );
1583 if (HOSTDATA(SCpnt->host)->mb[i].status) {
1584 printk(KERN_ERR "OGMB still full - restarting\n");
1585 aha1542_out(SCpnt->host->io_port, &ahacmd, 1);
1586 };
1587 } else
1588 printk(KERN_ERR "Other pending command %s\n",
1589 SCpnt->request->rq_disk ?
1590 SCpnt->request->rq_disk->disk_name : "?"
1591 );
1592 }
1593 #endif
1594
1595 DEB(printk("aha1542_abort\n"));
1596 #if 0
1597 spin_lock_irqsave(&aha1542_lock, flags);
1598 for (mbo = 0; mbo < AHA1542_MAILBOXES; mbo++) {
1599 if (SCpnt == HOSTDATA(SCpnt->host)->SCint[mbo]) {
1600 mb[mbo].status = 2; /* Abort command */
1601 aha1542_out(SCpnt->host->io_port, &ahacmd, 1); /* start scsi command */
1602 spin_unlock_irqrestore(&aha1542_lock, flags);
1603 break;
1604 }
1605 }
1606 if (AHA1542_MAILBOXES == mbo)
1607 spin_unlock_irqrestore(&aha1542_lock, flags);
1608 #endif
1609 return SCSI_ABORT_SNOOZE;
1610 }
1611
1612 /* We do not implement a reset function here, but the upper level code
1613 assumes that it will get some kind of response for the command in
1614 SCpnt. We must oblige, or the command will hang the scsi system.
1615 For a first go, we assume that the 1542 notifies us with all of the
1616 pending commands (it does implement soft reset, after all). */
1617
1618 static int aha1542_old_reset(Scsi_Cmnd * SCpnt, unsigned int reset_flags)
1619 {
1620 unchar ahacmd = CMD_START_SCSI;
1621 int i;
1622
1623 /*
1624 * See if a bus reset was suggested.
1625 */
1626 if (reset_flags & SCSI_RESET_SUGGEST_BUS_RESET) {
1627 /*
1628 * This does a scsi reset for all devices on the bus.
1629 * In principle, we could also reset the 1542 - should
1630 * we do this? Try this first, and we can add that later
1631 * if it turns out to be useful.
1632 */
1633 outb(HRST | SCRST, CONTROL(SCpnt->host->io_port));
1634
1635 /*
1636 * Wait for the thing to settle down a bit. Unfortunately
1637 * this is going to basically lock up the machine while we
1638 * wait for this to complete. To be 100% correct, we need to
1639 * check for timeout, and if we are doing something like this
1640 * we are pretty desperate anyways.
1641 */
1642 WAIT(STATUS(SCpnt->host->io_port),
1643 STATMASK, INIT | IDLE, STST | DIAGF | INVDCMD | DF | CDF);
1644
1645 /*
1646 * We need to do this too before the 1542 can interact with
1647 * us again.
1648 */
1649 setup_mailboxes(SCpnt->host->io_port, SCpnt->host);
1650
1651 /*
1652 * Now try to pick up the pieces. Restart all commands
1653 * that are currently active on the bus, and reset all of
1654 * the datastructures. We have some time to kill while
1655 * things settle down, so print a nice message.
1656 */
1657 printk(KERN_WARNING "Sent BUS RESET to scsi host %d\n", SCpnt->host->host_no);
1658
1659 for (i = 0; i < AHA1542_MAILBOXES; i++)
1660 if (HOSTDATA(SCpnt->host)->SCint[i] != NULL) {
1661 Scsi_Cmnd *SCtmp;
1662 SCtmp = HOSTDATA(SCpnt->host)->SCint[i];
1663 SCtmp->result = DID_RESET << 16;
1664 kfree(SCtmp->host_scribble);
1665 SCtmp->host_scribble = NULL;
1666 printk(KERN_WARNING "Sending DID_RESET for target %d\n", SCpnt->target);
1667 SCtmp->scsi_done(SCpnt);
1668
1669 HOSTDATA(SCpnt->host)->SCint[i] = NULL;
1670 HOSTDATA(SCpnt->host)->mb[i].status = 0;
1671 }
1672 /*
1673 * Now tell the mid-level code what we did here. Since
1674 * we have restarted all of the outstanding commands,
1675 * then report SUCCESS.
1676 */
1677 return (SCSI_RESET_SUCCESS | SCSI_RESET_BUS_RESET);
1678 fail:
1679 printk(KERN_CRIT "aha1542.c: Unable to perform hard reset.\n");
1680 printk(KERN_CRIT "Power cycle machine to reset\n");
1681 return (SCSI_RESET_ERROR | SCSI_RESET_BUS_RESET);
1682
1683
1684 } else {
1685 /* This does a selective reset of just the one device */
1686 /* First locate the ccb for this command */
1687 for (i = 0; i < AHA1542_MAILBOXES; i++)
1688 if (HOSTDATA(SCpnt->host)->SCint[i] == SCpnt) {
1689 HOSTDATA(SCpnt->host)->ccb[i].op = 0x81; /* BUS DEVICE RESET */
1690 /* Now tell the 1542 to flush all pending commands for this target */
1691 aha1542_out(SCpnt->host->io_port, &ahacmd, 1);
1692
1693 /* Here is the tricky part. What to do next. Do we get an interrupt
1694 for the commands that we aborted with the specified target, or
1695 do we generate this on our own? Try it without first and see
1696 what happens */
1697 printk(KERN_WARNING "Sent BUS DEVICE RESET to target %d\n", SCpnt->target);
1698
1699 /* If the first does not work, then try the second. I think the
1700 first option is more likely to be correct. Free the command
1701 block for all commands running on this target... */
1702 for (i = 0; i < AHA1542_MAILBOXES; i++)
1703 if (HOSTDATA(SCpnt->host)->SCint[i] &&
1704 HOSTDATA(SCpnt->host)->SCint[i]->target == SCpnt->target) {
1705 Scsi_Cmnd *SCtmp;
1706 SCtmp = HOSTDATA(SCpnt->host)->SCint[i];
1707 SCtmp->result = DID_RESET << 16;
1708 kfree(SCtmp->host_scribble);
1709 SCtmp->host_scribble = NULL;
1710 printk(KERN_WARNING "Sending DID_RESET for target %d\n", SCpnt->target);
1711 SCtmp->scsi_done(SCpnt);
1712
1713 HOSTDATA(SCpnt->host)->SCint[i] = NULL;
1714 HOSTDATA(SCpnt->host)->mb[i].status = 0;
1715 }
1716 return SCSI_RESET_SUCCESS;
1717 }
1718 }
1719 /* No active command at this time, so this means that each time we got
1720 some kind of response the last time through. Tell the mid-level code
1721 to request sense information in order to decide what to do next. */
1722 return SCSI_RESET_PUNT;
1723 }
1724 #endif /* end of big comment block around old_abort + old_reset */
1725
1726 static int aha1542_biosparam(struct scsi_device *sdev,
1727 struct block_device *bdev, sector_t capacity, int *ip)
1728 {
1729 int translation_algorithm;
1730 int size = capacity;
1731
1732 translation_algorithm = HOSTDATA(sdev->host)->bios_translation;
1733
1734 if ((size >> 11) > 1024 && translation_algorithm == BIOS_TRANSLATION_25563) {
1735 /* Please verify that this is the same as what DOS returns */
1736 ip[0] = 255;
1737 ip[1] = 63;
1738 ip[2] = size / 255 / 63;
1739 } else {
1740 ip[0] = 64;
1741 ip[1] = 32;
1742 ip[2] = size >> 11;
1743 }
1744
1745 return 0;
1746 }
1747 MODULE_LICENSE("GPL");
1748
1749
1750 static struct scsi_host_template driver_template = {
1751 .proc_name = "aha1542",
1752 .name = "Adaptec 1542",
1753 .detect = aha1542_detect,
1754 .release = aha1542_release,
1755 .queuecommand = aha1542_queuecommand,
1756 .eh_device_reset_handler= aha1542_dev_reset,
1757 .eh_bus_reset_handler = aha1542_bus_reset,
1758 .eh_host_reset_handler = aha1542_host_reset,
1759 .bios_param = aha1542_biosparam,
1760 .can_queue = AHA1542_MAILBOXES,
1761 .this_id = 7,
1762 .sg_tablesize = AHA1542_SCATTER,
1763 .cmd_per_lun = AHA1542_CMDLUN,
1764 .unchecked_isa_dma = 1,
1765 .use_clustering = ENABLE_CLUSTERING,
1766 };
1767 #include "scsi_module.c"
Linux for Ginger Game Console