1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Driver for Adaptec AHA-1542 SCSI host adapters
4 *
5 * Copyright (C) 1992 Tommy Thorn
6 * Copyright (C) 1993, 1994, 1995 Eric Youngdale
7 * Copyright (C) 2015 Ondrej Zary
8 */
9
10 #include <linux/module.h>
11 #include <linux/interrupt.h>
12 #include <linux/kernel.h>
13 #include <linux/types.h>
14 #include <linux/string.h>
15 #include <linux/delay.h>
16 #include <linux/init.h>
17 #include <linux/spinlock.h>
18 #include <linux/isa.h>
19 #include <linux/pnp.h>
20 #include <linux/slab.h>
21 #include <linux/io.h>
22 #include <asm/dma.h>
23 #include <scsi/scsi_cmnd.h>
24 #include <scsi/scsi_device.h>
25 #include <scsi/scsi_host.h>
26 #include "aha1542.h"
27
28 #define MAXBOARDS 4
29
30 static bool isapnp = 1;
31 module_param(isapnp, bool, 0);
32 MODULE_PARM_DESC(isapnp, "enable PnP support (default=1)");
33
34 static int io[MAXBOARDS] = { 0x330, 0x334, 0, 0 };
35 module_param_hw_array(io, int, ioport, NULL, 0);
36 MODULE_PARM_DESC(io, "base IO address of controller (0x130,0x134,0x230,0x234,0x330,0x334, default=0x330,0x334)");
37
38 /* time AHA spends on the AT-bus during data transfer */
39 static int bus_on[MAXBOARDS] = { -1, -1, -1, -1 }; /* power-on default: 11us */
40 module_param_array(bus_on, int, NULL, 0);
41 MODULE_PARM_DESC(bus_on, "bus on time [us] (2-15, default=-1 [HW default: 11])");
42
43 /* time AHA spends off the bus (not to monopolize it) during data transfer */
44 static int bus_off[MAXBOARDS] = { -1, -1, -1, -1 }; /* power-on default: 4us */
45 module_param_array(bus_off, int, NULL, 0);
46 MODULE_PARM_DESC(bus_off, "bus off time [us] (1-64, default=-1 [HW default: 4])");
47
48 /* default is jumper selected (J1 on 1542A), factory default = 5 MB/s */
49 static int dma_speed[MAXBOARDS] = { -1, -1, -1, -1 };
50 module_param_array(dma_speed, int, NULL, 0);
51 MODULE_PARM_DESC(dma_speed, "DMA speed [MB/s] (5,6,7,8,10, default=-1 [by jumper])");
52
53 #define BIOS_TRANSLATION_6432 1 /* Default case these days */
54 #define BIOS_TRANSLATION_25563 2 /* Big disk case */
55
56 struct aha1542_hostdata {
57 /* This will effectively start both of them at the first mailbox */
58 int bios_translation; /* Mapping bios uses - for compatibility */
59 int aha1542_last_mbi_used;
60 int aha1542_last_mbo_used;
61 struct scsi_cmnd *int_cmds[AHA1542_MAILBOXES];
62 struct mailbox *mb;
63 dma_addr_t mb_handle;
64 struct ccb *ccb;
65 dma_addr_t ccb_handle;
66 };
67
68 #define AHA1542_MAX_SECTORS 16
69
70 struct aha1542_cmd {
71 /* bounce buffer */
72 void *data_buffer;
73 dma_addr_t data_buffer_handle;
74 };
75
aha1542_intr_reset(u16 base)76 static inline void aha1542_intr_reset(u16 base)
77 {
78 outb(IRST, CONTROL(base));
79 }
80
wait_mask(u16 port,u8 mask,u8 allof,u8 noneof,int timeout)81 static inline bool wait_mask(u16 port, u8 mask, u8 allof, u8 noneof, int timeout)
82 {
83 bool delayed = true;
84
85 if (timeout == 0) {
86 timeout = 3000000;
87 delayed = false;
88 }
89
90 while (1) {
91 u8 bits = inb(port) & mask;
92 if ((bits & allof) == allof && ((bits & noneof) == 0))
93 break;
94 if (delayed)
95 mdelay(1);
96 if (--timeout == 0)
97 return false;
98 }
99
100 return true;
101 }
102
aha1542_outb(unsigned int base,u8 val)103 static int aha1542_outb(unsigned int base, u8 val)
104 {
105 if (!wait_mask(STATUS(base), CDF, 0, CDF, 0))
106 return 1;
107 outb(val, DATA(base));
108
109 return 0;
110 }
111
aha1542_out(unsigned int base,u8 * buf,int len)112 static int aha1542_out(unsigned int base, u8 *buf, int len)
113 {
114 while (len--) {
115 if (!wait_mask(STATUS(base), CDF, 0, CDF, 0))
116 return 1;
117 outb(*buf++, DATA(base));
118 }
119 if (!wait_mask(INTRFLAGS(base), INTRMASK, HACC, 0, 0))
120 return 1;
121
122 return 0;
123 }
124
125 /*
126 * Only used at boot time, so we do not need to worry about latency as much
127 * here
128 */
129
aha1542_in(unsigned int base,u8 * buf,int len,int timeout)130 static int aha1542_in(unsigned int base, u8 *buf, int len, int timeout)
131 {
132 while (len--) {
133 if (!wait_mask(STATUS(base), DF, DF, 0, timeout))
134 return 1;
135 *buf++ = inb(DATA(base));
136 }
137 return 0;
138 }
139
makecode(unsigned hosterr,unsigned scsierr)140 static int makecode(unsigned hosterr, unsigned scsierr)
141 {
142 switch (hosterr) {
143 case 0x0:
144 case 0xa: /* Linked command complete without error and linked normally */
145 case 0xb: /* Linked command complete without error, interrupt generated */
146 hosterr = 0;
147 break;
148
149 case 0x11: /* Selection time out-The initiator selection or target
150 * reselection was not complete within the SCSI Time out period
151 */
152 hosterr = DID_TIME_OUT;
153 break;
154
155 case 0x12: /* Data overrun/underrun-The target attempted to transfer more data
156 * than was allocated by the Data Length field or the sum of the
157 * Scatter / Gather Data Length fields.
158 */
159
160 case 0x13: /* Unexpected bus free-The target dropped the SCSI BSY at an unexpected time. */
161
162 case 0x15: /* MBO command was not 00, 01 or 02-The first byte of the CB was
163 * invalid. This usually indicates a software failure.
164 */
165
166 case 0x16: /* Invalid CCB Operation Code-The first byte of the CCB was invalid.
167 * This usually indicates a software failure.
168 */
169
170 case 0x17: /* Linked CCB does not have the same LUN-A subsequent CCB of a set
171 * of linked CCB's does not specify the same logical unit number as
172 * the first.
173 */
174 case 0x18: /* Invalid Target Direction received from Host-The direction of a
175 * Target Mode CCB was invalid.
176 */
177
178 case 0x19: /* Duplicate CCB Received in Target Mode-More than once CCB was
179 * received to service data transfer between the same target LUN
180 * and initiator SCSI ID in the same direction.
181 */
182
183 case 0x1a: /* Invalid CCB or Segment List Parameter-A segment list with a zero
184 * length segment or invalid segment list boundaries was received.
185 * A CCB parameter was invalid.
186 */
187 #ifdef DEBUG
188 printk("Aha1542: %x %x\n", hosterr, scsierr);
189 #endif
190 hosterr = DID_ERROR; /* Couldn't find any better */
191 break;
192
193 case 0x14: /* Target bus phase sequence failure-An invalid bus phase or bus
194 * phase sequence was requested by the target. The host adapter
195 * will generate a SCSI Reset Condition, notifying the host with
196 * a SCRD interrupt
197 */
198 hosterr = DID_RESET;
199 break;
200 default:
201 printk(KERN_ERR "aha1542: makecode: unknown hoststatus %x\n", hosterr);
202 break;
203 }
204 return scsierr | (hosterr << 16);
205 }
206
aha1542_test_port(struct Scsi_Host * sh)207 static int aha1542_test_port(struct Scsi_Host *sh)
208 {
209 int i;
210
211 /* Quick and dirty test for presence of the card. */
212 if (inb(STATUS(sh->io_port)) == 0xff)
213 return 0;
214
215 /* Reset the adapter. I ought to make a hard reset, but it's not really necessary */
216
217 /* In case some other card was probing here, reset interrupts */
218 aha1542_intr_reset(sh->io_port); /* reset interrupts, so they don't block */
219
220 outb(SRST | IRST /*|SCRST */ , CONTROL(sh->io_port));
221
222 mdelay(20); /* Wait a little bit for things to settle down. */
223
224 /* Expect INIT and IDLE, any of the others are bad */
225 if (!wait_mask(STATUS(sh->io_port), STATMASK, INIT | IDLE, STST | DIAGF | INVDCMD | DF | CDF, 0))
226 return 0;
227
228 /* Shouldn't have generated any interrupts during reset */
229 if (inb(INTRFLAGS(sh->io_port)) & INTRMASK)
230 return 0;
231
232 /*
233 * Perform a host adapter inquiry instead so we do not need to set
234 * up the mailboxes ahead of time
235 */
236
237 aha1542_outb(sh->io_port, CMD_INQUIRY);
238
239 for (i = 0; i < 4; i++) {
240 if (!wait_mask(STATUS(sh->io_port), DF, DF, 0, 0))
241 return 0;
242 (void)inb(DATA(sh->io_port));
243 }
244
245 /* Reading port should reset DF */
246 if (inb(STATUS(sh->io_port)) & DF)
247 return 0;
248
249 /* When HACC, command is completed, and we're though testing */
250 if (!wait_mask(INTRFLAGS(sh->io_port), HACC, HACC, 0, 0))
251 return 0;
252
253 /* Clear interrupts */
254 outb(IRST, CONTROL(sh->io_port));
255
256 return 1;
257 }
258
aha1542_free_cmd(struct scsi_cmnd * cmd)259 static void aha1542_free_cmd(struct scsi_cmnd *cmd)
260 {
261 struct aha1542_cmd *acmd = scsi_cmd_priv(cmd);
262
263 if (cmd->sc_data_direction == DMA_FROM_DEVICE) {
264 struct request *rq = scsi_cmd_to_rq(cmd);
265 void *buf = acmd->data_buffer;
266 struct req_iterator iter;
267 struct bio_vec bv;
268
269 rq_for_each_segment(bv, rq, iter) {
270 memcpy_to_bvec(&bv, buf);
271 buf += bv.bv_len;
272 }
273 }
274
275 scsi_dma_unmap(cmd);
276 }
277
aha1542_interrupt(int irq,void * dev_id)278 static irqreturn_t aha1542_interrupt(int irq, void *dev_id)
279 {
280 struct Scsi_Host *sh = dev_id;
281 struct aha1542_hostdata *aha1542 = shost_priv(sh);
282 int errstatus, mbi, mbo, mbistatus;
283 int number_serviced;
284 unsigned long flags;
285 struct scsi_cmnd *tmp_cmd;
286 int flag;
287 struct mailbox *mb = aha1542->mb;
288 struct ccb *ccb = aha1542->ccb;
289
290 #ifdef DEBUG
291 {
292 flag = inb(INTRFLAGS(sh->io_port));
293 shost_printk(KERN_DEBUG, sh, "aha1542_intr_handle: ");
294 if (!(flag & ANYINTR))
295 printk("no interrupt?");
296 if (flag & MBIF)
297 printk("MBIF ");
298 if (flag & MBOA)
299 printk("MBOF ");
300 if (flag & HACC)
301 printk("HACC ");
302 if (flag & SCRD)
303 printk("SCRD ");
304 printk("status %02x\n", inb(STATUS(sh->io_port)));
305 }
306 #endif
307 number_serviced = 0;
308
309 spin_lock_irqsave(sh->host_lock, flags);
310 while (1) {
311 flag = inb(INTRFLAGS(sh->io_port));
312
313 /*
314 * Check for unusual interrupts. If any of these happen, we should
315 * probably do something special, but for now just printing a message
316 * is sufficient. A SCSI reset detected is something that we really
317 * need to deal with in some way.
318 */
319 if (flag & ~MBIF) {
320 if (flag & MBOA)
321 printk("MBOF ");
322 if (flag & HACC)
323 printk("HACC ");
324 if (flag & SCRD)
325 printk("SCRD ");
326 }
327 aha1542_intr_reset(sh->io_port);
328
329 mbi = aha1542->aha1542_last_mbi_used + 1;
330 if (mbi >= 2 * AHA1542_MAILBOXES)
331 mbi = AHA1542_MAILBOXES;
332
333 do {
334 if (mb[mbi].status != 0)
335 break;
336 mbi++;
337 if (mbi >= 2 * AHA1542_MAILBOXES)
338 mbi = AHA1542_MAILBOXES;
339 } while (mbi != aha1542->aha1542_last_mbi_used);
340
341 if (mb[mbi].status == 0) {
342 spin_unlock_irqrestore(sh->host_lock, flags);
343 /* Hmm, no mail. Must have read it the last time around */
344 if (!number_serviced)
345 shost_printk(KERN_WARNING, sh, "interrupt received, but no mail.\n");
346 return IRQ_HANDLED;
347 }
348
349 mbo = (scsi2int(mb[mbi].ccbptr) - (unsigned long)aha1542->ccb_handle) / sizeof(struct ccb);
350 mbistatus = mb[mbi].status;
351 mb[mbi].status = 0;
352 aha1542->aha1542_last_mbi_used = mbi;
353
354 #ifdef DEBUG
355 if (ccb[mbo].tarstat | ccb[mbo].hastat)
356 shost_printk(KERN_DEBUG, sh, "aha1542_command: returning %x (status %d)\n",
357 ccb[mbo].tarstat + ((int) ccb[mbo].hastat << 16), mb[mbi].status);
358 #endif
359
360 if (mbistatus == 3)
361 continue; /* Aborted command not found */
362
363 #ifdef DEBUG
364 shost_printk(KERN_DEBUG, sh, "...done %d %d\n", mbo, mbi);
365 #endif
366
367 tmp_cmd = aha1542->int_cmds[mbo];
368
369 if (!tmp_cmd) {
370 spin_unlock_irqrestore(sh->host_lock, flags);
371 shost_printk(KERN_WARNING, sh, "Unexpected interrupt\n");
372 shost_printk(KERN_WARNING, sh, "tarstat=%x, hastat=%x idlun=%x ccb#=%d\n", ccb[mbo].tarstat,
373 ccb[mbo].hastat, ccb[mbo].idlun, mbo);
374 return IRQ_HANDLED;
375 }
376 aha1542_free_cmd(tmp_cmd);
377 /*
378 * Fetch the sense data, and tuck it away, in the required slot. The
379 * Adaptec automatically fetches it, and there is no guarantee that
380 * we will still have it in the cdb when we come back
381 */
382 if (ccb[mbo].tarstat == 2)
383 memcpy(tmp_cmd->sense_buffer, &ccb[mbo].cdb[ccb[mbo].cdblen],
384 SCSI_SENSE_BUFFERSIZE);
385
386
387 /* is there mail :-) */
388
389 /* more error checking left out here */
390 if (mbistatus != 1)
391 /* This is surely wrong, but I don't know what's right */
392 errstatus = makecode(ccb[mbo].hastat, ccb[mbo].tarstat);
393 else
394 errstatus = 0;
395
396 #ifdef DEBUG
397 if (errstatus)
398 shost_printk(KERN_DEBUG, sh, "(aha1542 error:%x %x %x) ", errstatus,
399 ccb[mbo].hastat, ccb[mbo].tarstat);
400 if (ccb[mbo].tarstat == 2)
401 print_hex_dump_bytes("sense: ", DUMP_PREFIX_NONE, &ccb[mbo].cdb[ccb[mbo].cdblen], 12);
402 if (errstatus)
403 printk("aha1542_intr_handle: returning %6x\n", errstatus);
404 #endif
405 tmp_cmd->result = errstatus;
406 aha1542->int_cmds[mbo] = NULL; /* This effectively frees up the mailbox slot, as
407 * far as queuecommand is concerned
408 */
409 scsi_done(tmp_cmd);
410 number_serviced++;
411 }
412 }
413
aha1542_queuecommand(struct Scsi_Host * sh,struct scsi_cmnd * cmd)414 static enum scsi_qc_status aha1542_queuecommand(struct Scsi_Host *sh,
415 struct scsi_cmnd *cmd)
416 {
417 struct aha1542_cmd *acmd = scsi_cmd_priv(cmd);
418 struct aha1542_hostdata *aha1542 = shost_priv(sh);
419 u8 direction;
420 u8 target = cmd->device->id;
421 u8 lun = cmd->device->lun;
422 unsigned long flags;
423 int bufflen = scsi_bufflen(cmd);
424 int mbo;
425 struct mailbox *mb = aha1542->mb;
426 struct ccb *ccb = aha1542->ccb;
427
428 if (*cmd->cmnd == REQUEST_SENSE) {
429 /* Don't do the command - we have the sense data already */
430 cmd->result = 0;
431 scsi_done(cmd);
432 return 0;
433 }
434 #ifdef DEBUG
435 {
436 int i = -1;
437 if (*cmd->cmnd == READ_10 || *cmd->cmnd == WRITE_10)
438 i = xscsi2int(cmd->cmnd + 2);
439 else if (*cmd->cmnd == READ_6 || *cmd->cmnd == WRITE_6)
440 i = scsi2int(cmd->cmnd + 2);
441 shost_printk(KERN_DEBUG, sh, "aha1542_queuecommand: dev %d cmd %02x pos %d len %d",
442 target, *cmd->cmnd, i, bufflen);
443 print_hex_dump_bytes("command: ", DUMP_PREFIX_NONE, cmd->cmnd, cmd->cmd_len);
444 }
445 #endif
446
447 if (cmd->sc_data_direction == DMA_TO_DEVICE) {
448 struct request *rq = scsi_cmd_to_rq(cmd);
449 void *buf = acmd->data_buffer;
450 struct req_iterator iter;
451 struct bio_vec bv;
452
453 rq_for_each_segment(bv, rq, iter) {
454 memcpy_from_bvec(buf, &bv);
455 buf += bv.bv_len;
456 }
457 }
458
459 /*
460 * Use the outgoing mailboxes in a round-robin fashion, because this
461 * is how the host adapter will scan for them
462 */
463
464 spin_lock_irqsave(sh->host_lock, flags);
465 mbo = aha1542->aha1542_last_mbo_used + 1;
466 if (mbo >= AHA1542_MAILBOXES)
467 mbo = 0;
468
469 do {
470 if (mb[mbo].status == 0 && aha1542->int_cmds[mbo] == NULL)
471 break;
472 mbo++;
473 if (mbo >= AHA1542_MAILBOXES)
474 mbo = 0;
475 } while (mbo != aha1542->aha1542_last_mbo_used);
476
477 if (mb[mbo].status || aha1542->int_cmds[mbo])
478 panic("Unable to find empty mailbox for aha1542.\n");
479
480 aha1542->int_cmds[mbo] = cmd; /* This will effectively prevent someone else from
481 * screwing with this cdb.
482 */
483
484 aha1542->aha1542_last_mbo_used = mbo;
485
486 #ifdef DEBUG
487 shost_printk(KERN_DEBUG, sh, "Sending command (%d)...", mbo);
488 #endif
489
490 /* This gets trashed for some reason */
491 any2scsi(mb[mbo].ccbptr, aha1542->ccb_handle + mbo * sizeof(*ccb));
492
493 memset(&ccb[mbo], 0, sizeof(struct ccb));
494
495 ccb[mbo].cdblen = cmd->cmd_len;
496
497 direction = 0;
498 if (*cmd->cmnd == READ_10 || *cmd->cmnd == READ_6)
499 direction = 8;
500 else if (*cmd->cmnd == WRITE_10 || *cmd->cmnd == WRITE_6)
501 direction = 16;
502
503 memcpy(ccb[mbo].cdb, cmd->cmnd, ccb[mbo].cdblen);
504 ccb[mbo].op = 0; /* SCSI Initiator Command */
505 any2scsi(ccb[mbo].datalen, bufflen);
506 if (bufflen)
507 any2scsi(ccb[mbo].dataptr, acmd->data_buffer_handle);
508 else
509 any2scsi(ccb[mbo].dataptr, 0);
510 ccb[mbo].idlun = (target & 7) << 5 | direction | (lun & 7); /*SCSI Target Id */
511 ccb[mbo].rsalen = 16;
512 ccb[mbo].linkptr[0] = ccb[mbo].linkptr[1] = ccb[mbo].linkptr[2] = 0;
513 ccb[mbo].commlinkid = 0;
514
515 #ifdef DEBUG
516 print_hex_dump_bytes("sending: ", DUMP_PREFIX_NONE, &ccb[mbo], sizeof(ccb[mbo]) - 10);
517 printk("aha1542_queuecommand: now waiting for interrupt ");
518 #endif
519 mb[mbo].status = 1;
520 aha1542_outb(cmd->device->host->io_port, CMD_START_SCSI);
521 spin_unlock_irqrestore(sh->host_lock, flags);
522
523 return 0;
524 }
525
526 /* Initialize mailboxes */
setup_mailboxes(struct Scsi_Host * sh)527 static void setup_mailboxes(struct Scsi_Host *sh)
528 {
529 struct aha1542_hostdata *aha1542 = shost_priv(sh);
530 u8 mb_cmd[5] = { CMD_MBINIT, AHA1542_MAILBOXES, 0, 0, 0};
531 int i;
532
533 for (i = 0; i < AHA1542_MAILBOXES; i++) {
534 aha1542->mb[i].status = 0;
535 any2scsi(aha1542->mb[i].ccbptr,
536 aha1542->ccb_handle + i * sizeof(struct ccb));
537 aha1542->mb[AHA1542_MAILBOXES + i].status = 0;
538 }
539 aha1542_intr_reset(sh->io_port); /* reset interrupts, so they don't block */
540 any2scsi(mb_cmd + 2, aha1542->mb_handle);
541 if (aha1542_out(sh->io_port, mb_cmd, 5))
542 shost_printk(KERN_ERR, sh, "failed setting up mailboxes\n");
543 aha1542_intr_reset(sh->io_port);
544 }
545
aha1542_getconfig(struct Scsi_Host * sh)546 static int aha1542_getconfig(struct Scsi_Host *sh)
547 {
548 u8 inquiry_result[3];
549 int i;
550 i = inb(STATUS(sh->io_port));
551 if (i & DF) {
552 i = inb(DATA(sh->io_port));
553 }
554 aha1542_outb(sh->io_port, CMD_RETCONF);
555 aha1542_in(sh->io_port, inquiry_result, 3, 0);
556 if (!wait_mask(INTRFLAGS(sh->io_port), INTRMASK, HACC, 0, 0))
557 shost_printk(KERN_ERR, sh, "error querying board settings\n");
558 aha1542_intr_reset(sh->io_port);
559 switch (inquiry_result[0]) {
560 case 0x80:
561 sh->dma_channel = 7;
562 break;
563 case 0x40:
564 sh->dma_channel = 6;
565 break;
566 case 0x20:
567 sh->dma_channel = 5;
568 break;
569 case 0x01:
570 sh->dma_channel = 0;
571 break;
572 case 0:
573 /*
574 * This means that the adapter, although Adaptec 1542 compatible, doesn't use a DMA channel.
575 * Currently only aware of the BusLogic BT-445S VL-Bus adapter which needs this.
576 */
577 sh->dma_channel = 0xFF;
578 break;
579 default:
580 shost_printk(KERN_ERR, sh, "Unable to determine DMA channel.\n");
581 return -1;
582 }
583 switch (inquiry_result[1]) {
584 case 0x40:
585 sh->irq = 15;
586 break;
587 case 0x20:
588 sh->irq = 14;
589 break;
590 case 0x8:
591 sh->irq = 12;
592 break;
593 case 0x4:
594 sh->irq = 11;
595 break;
596 case 0x2:
597 sh->irq = 10;
598 break;
599 case 0x1:
600 sh->irq = 9;
601 break;
602 default:
603 shost_printk(KERN_ERR, sh, "Unable to determine IRQ level.\n");
604 return -1;
605 }
606 sh->this_id = inquiry_result[2] & 7;
607 return 0;
608 }
609
610 /*
611 * This function should only be called for 1542C boards - we can detect
612 * the special firmware settings and unlock the board
613 */
614
aha1542_mbenable(struct Scsi_Host * sh)615 static int aha1542_mbenable(struct Scsi_Host *sh)
616 {
617 static u8 mbenable_cmd[3];
618 static u8 mbenable_result[2];
619 int retval;
620
621 retval = BIOS_TRANSLATION_6432;
622
623 aha1542_outb(sh->io_port, CMD_EXTBIOS);
624 if (aha1542_in(sh->io_port, mbenable_result, 2, 100))
625 return retval;
626 if (!wait_mask(INTRFLAGS(sh->io_port), INTRMASK, HACC, 0, 100))
627 goto fail;
628 aha1542_intr_reset(sh->io_port);
629
630 if ((mbenable_result[0] & 0x08) || mbenable_result[1]) {
631 mbenable_cmd[0] = CMD_MBENABLE;
632 mbenable_cmd[1] = 0;
633 mbenable_cmd[2] = mbenable_result[1];
634
635 if ((mbenable_result[0] & 0x08) && (mbenable_result[1] & 0x03))
636 retval = BIOS_TRANSLATION_25563;
637
638 if (aha1542_out(sh->io_port, mbenable_cmd, 3))
639 goto fail;
640 }
641 while (0) {
642 fail:
643 shost_printk(KERN_ERR, sh, "Mailbox init failed\n");
644 }
645 aha1542_intr_reset(sh->io_port);
646 return retval;
647 }
648
649 /* Query the board to find out if it is a 1542 or a 1740, or whatever. */
aha1542_query(struct Scsi_Host * sh)650 static int aha1542_query(struct Scsi_Host *sh)
651 {
652 struct aha1542_hostdata *aha1542 = shost_priv(sh);
653 u8 inquiry_result[4];
654 int i;
655 i = inb(STATUS(sh->io_port));
656 if (i & DF) {
657 i = inb(DATA(sh->io_port));
658 }
659 aha1542_outb(sh->io_port, CMD_INQUIRY);
660 aha1542_in(sh->io_port, inquiry_result, 4, 0);
661 if (!wait_mask(INTRFLAGS(sh->io_port), INTRMASK, HACC, 0, 0))
662 shost_printk(KERN_ERR, sh, "error querying card type\n");
663 aha1542_intr_reset(sh->io_port);
664
665 aha1542->bios_translation = BIOS_TRANSLATION_6432; /* Default case */
666
667 /*
668 * For an AHA1740 series board, we ignore the board since there is a
669 * hardware bug which can lead to wrong blocks being returned if the board
670 * is operating in the 1542 emulation mode. Since there is an extended mode
671 * driver, we simply ignore the board and let the 1740 driver pick it up.
672 */
673
674 if (inquiry_result[0] == 0x43) {
675 shost_printk(KERN_INFO, sh, "Emulation mode not supported for AHA-1740 hardware, use aha1740 driver instead.\n");
676 return 1;
677 }
678
679 /*
680 * Always call this - boards that do not support extended bios translation
681 * will ignore the command, and we will set the proper default
682 */
683
684 aha1542->bios_translation = aha1542_mbenable(sh);
685
686 return 0;
687 }
688
dma_speed_hw(int dma_speed)689 static u8 dma_speed_hw(int dma_speed)
690 {
691 switch (dma_speed) {
692 case 5:
693 return 0x00;
694 case 6:
695 return 0x04;
696 case 7:
697 return 0x01;
698 case 8:
699 return 0x02;
700 case 10:
701 return 0x03;
702 }
703
704 return 0xff; /* invalid */
705 }
706
707 /* Set the Bus on/off-times as not to ruin floppy performance */
aha1542_set_bus_times(struct Scsi_Host * sh,int bus_on,int bus_off,int dma_speed)708 static void aha1542_set_bus_times(struct Scsi_Host *sh, int bus_on, int bus_off, int dma_speed)
709 {
710 if (bus_on > 0) {
711 u8 oncmd[] = { CMD_BUSON_TIME, clamp(bus_on, 2, 15) };
712
713 aha1542_intr_reset(sh->io_port);
714 if (aha1542_out(sh->io_port, oncmd, 2))
715 goto fail;
716 }
717
718 if (bus_off > 0) {
719 u8 offcmd[] = { CMD_BUSOFF_TIME, clamp(bus_off, 1, 64) };
720
721 aha1542_intr_reset(sh->io_port);
722 if (aha1542_out(sh->io_port, offcmd, 2))
723 goto fail;
724 }
725
726 if (dma_speed_hw(dma_speed) != 0xff) {
727 u8 dmacmd[] = { CMD_DMASPEED, dma_speed_hw(dma_speed) };
728
729 aha1542_intr_reset(sh->io_port);
730 if (aha1542_out(sh->io_port, dmacmd, 2))
731 goto fail;
732 }
733 aha1542_intr_reset(sh->io_port);
734 return;
735 fail:
736 shost_printk(KERN_ERR, sh, "setting bus on/off-time failed\n");
737 aha1542_intr_reset(sh->io_port);
738 }
739
740 /* return non-zero on detection */
aha1542_hw_init(const struct scsi_host_template * tpnt,struct device * pdev,int indx)741 static struct Scsi_Host *aha1542_hw_init(const struct scsi_host_template *tpnt,
742 struct device *pdev, int indx)
743 {
744 unsigned int base_io = io[indx];
745 struct Scsi_Host *sh;
746 struct aha1542_hostdata *aha1542;
747 char dma_info[] = "no DMA";
748
749 if (base_io == 0)
750 return NULL;
751
752 if (!request_region(base_io, AHA1542_REGION_SIZE, "aha1542"))
753 return NULL;
754
755 sh = scsi_host_alloc(tpnt, sizeof(struct aha1542_hostdata));
756 if (!sh)
757 goto release;
758 aha1542 = shost_priv(sh);
759
760 sh->unique_id = base_io;
761 sh->io_port = base_io;
762 sh->n_io_port = AHA1542_REGION_SIZE;
763 aha1542->aha1542_last_mbi_used = 2 * AHA1542_MAILBOXES - 1;
764 aha1542->aha1542_last_mbo_used = AHA1542_MAILBOXES - 1;
765
766 if (!aha1542_test_port(sh))
767 goto unregister;
768
769 aha1542_set_bus_times(sh, bus_on[indx], bus_off[indx], dma_speed[indx]);
770 if (aha1542_query(sh))
771 goto unregister;
772 if (aha1542_getconfig(sh) == -1)
773 goto unregister;
774
775 if (sh->dma_channel != 0xFF)
776 snprintf(dma_info, sizeof(dma_info), "DMA %d", sh->dma_channel);
777 shost_printk(KERN_INFO, sh, "Adaptec AHA-1542 (SCSI-ID %d) at IO 0x%x, IRQ %d, %s\n",
778 sh->this_id, base_io, sh->irq, dma_info);
779 if (aha1542->bios_translation == BIOS_TRANSLATION_25563)
780 shost_printk(KERN_INFO, sh, "Using extended bios translation\n");
781
782 if (dma_set_mask_and_coherent(pdev, DMA_BIT_MASK(24)) < 0)
783 goto unregister;
784
785 aha1542->mb = dma_alloc_coherent(pdev,
786 AHA1542_MAILBOXES * 2 * sizeof(struct mailbox),
787 &aha1542->mb_handle, GFP_KERNEL);
788 if (!aha1542->mb)
789 goto unregister;
790
791 aha1542->ccb = dma_alloc_coherent(pdev,
792 AHA1542_MAILBOXES * sizeof(struct ccb),
793 &aha1542->ccb_handle, GFP_KERNEL);
794 if (!aha1542->ccb)
795 goto free_mb;
796
797 setup_mailboxes(sh);
798
799 if (request_irq(sh->irq, aha1542_interrupt, 0, "aha1542", sh)) {
800 shost_printk(KERN_ERR, sh, "Unable to allocate IRQ.\n");
801 goto free_ccb;
802 }
803 if (sh->dma_channel != 0xFF) {
804 if (request_dma(sh->dma_channel, "aha1542")) {
805 shost_printk(KERN_ERR, sh, "Unable to allocate DMA channel.\n");
806 goto free_irq;
807 }
808 if (sh->dma_channel == 0 || sh->dma_channel >= 5) {
809 set_dma_mode(sh->dma_channel, DMA_MODE_CASCADE);
810 enable_dma(sh->dma_channel);
811 }
812 }
813
814 if (scsi_add_host(sh, pdev))
815 goto free_dma;
816
817 scsi_scan_host(sh);
818
819 return sh;
820
821 free_dma:
822 if (sh->dma_channel != 0xff)
823 free_dma(sh->dma_channel);
824 free_irq:
825 free_irq(sh->irq, sh);
826 free_ccb:
827 dma_free_coherent(pdev, AHA1542_MAILBOXES * sizeof(struct ccb),
828 aha1542->ccb, aha1542->ccb_handle);
829 free_mb:
830 dma_free_coherent(pdev, AHA1542_MAILBOXES * 2 * sizeof(struct mailbox),
831 aha1542->mb, aha1542->mb_handle);
832 unregister:
833 scsi_host_put(sh);
834 release:
835 release_region(base_io, AHA1542_REGION_SIZE);
836
837 return NULL;
838 }
839
aha1542_release(struct Scsi_Host * sh)840 static int aha1542_release(struct Scsi_Host *sh)
841 {
842 struct aha1542_hostdata *aha1542 = shost_priv(sh);
843 struct device *dev = sh->dma_dev;
844
845 scsi_remove_host(sh);
846 if (sh->dma_channel != 0xff)
847 free_dma(sh->dma_channel);
848 dma_free_coherent(dev, AHA1542_MAILBOXES * sizeof(struct ccb),
849 aha1542->ccb, aha1542->ccb_handle);
850 dma_free_coherent(dev, AHA1542_MAILBOXES * 2 * sizeof(struct mailbox),
851 aha1542->mb, aha1542->mb_handle);
852 if (sh->irq)
853 free_irq(sh->irq, sh);
854 if (sh->io_port && sh->n_io_port)
855 release_region(sh->io_port, sh->n_io_port);
856 scsi_host_put(sh);
857 return 0;
858 }
859
860
861 /*
862 * This is a device reset. This is handled by sending a special command
863 * to the device.
864 */
aha1542_dev_reset(struct scsi_cmnd * cmd)865 static int aha1542_dev_reset(struct scsi_cmnd *cmd)
866 {
867 struct Scsi_Host *sh = cmd->device->host;
868 struct aha1542_hostdata *aha1542 = shost_priv(sh);
869 unsigned long flags;
870 struct mailbox *mb = aha1542->mb;
871 u8 target = cmd->device->id;
872 u8 lun = cmd->device->lun;
873 int mbo;
874 struct ccb *ccb = aha1542->ccb;
875
876 spin_lock_irqsave(sh->host_lock, flags);
877 mbo = aha1542->aha1542_last_mbo_used + 1;
878 if (mbo >= AHA1542_MAILBOXES)
879 mbo = 0;
880
881 do {
882 if (mb[mbo].status == 0 && aha1542->int_cmds[mbo] == NULL)
883 break;
884 mbo++;
885 if (mbo >= AHA1542_MAILBOXES)
886 mbo = 0;
887 } while (mbo != aha1542->aha1542_last_mbo_used);
888
889 if (mb[mbo].status || aha1542->int_cmds[mbo])
890 panic("Unable to find empty mailbox for aha1542.\n");
891
892 aha1542->int_cmds[mbo] = cmd; /* This will effectively
893 * prevent someone else from
894 * screwing with this cdb.
895 */
896
897 aha1542->aha1542_last_mbo_used = mbo;
898
899 /* This gets trashed for some reason */
900 any2scsi(mb[mbo].ccbptr, aha1542->ccb_handle + mbo * sizeof(*ccb));
901
902 memset(&ccb[mbo], 0, sizeof(struct ccb));
903
904 ccb[mbo].op = 0x81; /* BUS DEVICE RESET */
905
906 ccb[mbo].idlun = (target & 7) << 5 | (lun & 7); /*SCSI Target Id */
907
908 ccb[mbo].linkptr[0] = ccb[mbo].linkptr[1] = ccb[mbo].linkptr[2] = 0;
909 ccb[mbo].commlinkid = 0;
910
911 /*
912 * Now tell the 1542 to flush all pending commands for this
913 * target
914 */
915 aha1542_outb(sh->io_port, CMD_START_SCSI);
916 spin_unlock_irqrestore(sh->host_lock, flags);
917
918 scmd_printk(KERN_WARNING, cmd,
919 "Trying device reset for target\n");
920
921 return SUCCESS;
922 }
923
aha1542_reset(struct scsi_cmnd * cmd,u8 reset_cmd)924 static int aha1542_reset(struct scsi_cmnd *cmd, u8 reset_cmd)
925 {
926 struct Scsi_Host *sh = cmd->device->host;
927 struct aha1542_hostdata *aha1542 = shost_priv(sh);
928 unsigned long flags;
929 int i;
930
931 spin_lock_irqsave(sh->host_lock, flags);
932 /*
933 * This does a scsi reset for all devices on the bus.
934 * In principle, we could also reset the 1542 - should
935 * we do this? Try this first, and we can add that later
936 * if it turns out to be useful.
937 */
938 outb(reset_cmd, CONTROL(cmd->device->host->io_port));
939
940 if (!wait_mask(STATUS(cmd->device->host->io_port),
941 STATMASK, IDLE, STST | DIAGF | INVDCMD | DF | CDF, 0)) {
942 spin_unlock_irqrestore(sh->host_lock, flags);
943 return FAILED;
944 }
945
946 /*
947 * We need to do this too before the 1542 can interact with
948 * us again after host reset.
949 */
950 if (reset_cmd & HRST)
951 setup_mailboxes(cmd->device->host);
952
953 /*
954 * Now try to pick up the pieces. For all pending commands,
955 * free any internal data structures, and basically clear things
956 * out. We do not try and restart any commands or anything -
957 * the strategy handler takes care of that crap.
958 */
959 shost_printk(KERN_WARNING, cmd->device->host, "Sent BUS RESET to scsi host %d\n", cmd->device->host->host_no);
960
961 for (i = 0; i < AHA1542_MAILBOXES; i++) {
962 if (aha1542->int_cmds[i] != NULL) {
963 struct scsi_cmnd *tmp_cmd;
964 tmp_cmd = aha1542->int_cmds[i];
965
966 if (tmp_cmd->device->soft_reset) {
967 /*
968 * If this device implements the soft reset option,
969 * then it is still holding onto the command, and
970 * may yet complete it. In this case, we don't
971 * flush the data.
972 */
973 continue;
974 }
975 aha1542_free_cmd(tmp_cmd);
976 aha1542->int_cmds[i] = NULL;
977 aha1542->mb[i].status = 0;
978 }
979 }
980
981 spin_unlock_irqrestore(sh->host_lock, flags);
982 return SUCCESS;
983 }
984
aha1542_bus_reset(struct scsi_cmnd * cmd)985 static int aha1542_bus_reset(struct scsi_cmnd *cmd)
986 {
987 return aha1542_reset(cmd, SCRST);
988 }
989
aha1542_host_reset(struct scsi_cmnd * cmd)990 static int aha1542_host_reset(struct scsi_cmnd *cmd)
991 {
992 return aha1542_reset(cmd, HRST | SCRST);
993 }
994
aha1542_biosparam(struct scsi_device * sdev,struct gendisk * unused,sector_t capacity,int geom[])995 static int aha1542_biosparam(struct scsi_device *sdev,
996 struct gendisk *unused, sector_t capacity, int geom[])
997 {
998 struct aha1542_hostdata *aha1542 = shost_priv(sdev->host);
999
1000 if (capacity >= 0x200000 &&
1001 aha1542->bios_translation == BIOS_TRANSLATION_25563) {
1002 /* Please verify that this is the same as what DOS returns */
1003 geom[0] = 255; /* heads */
1004 geom[1] = 63; /* sectors */
1005 } else {
1006 geom[0] = 64; /* heads */
1007 geom[1] = 32; /* sectors */
1008 }
1009 geom[2] = sector_div(capacity, geom[0] * geom[1]); /* cylinders */
1010
1011 return 0;
1012 }
1013
1014 MODULE_DESCRIPTION("Adaptec AHA-1542 SCSI host adapter driver");
1015 MODULE_LICENSE("GPL");
1016
aha1542_init_cmd_priv(struct Scsi_Host * shost,struct scsi_cmnd * cmd)1017 static int aha1542_init_cmd_priv(struct Scsi_Host *shost, struct scsi_cmnd *cmd)
1018 {
1019 struct aha1542_cmd *acmd = scsi_cmd_priv(cmd);
1020
1021 acmd->data_buffer = dma_alloc_coherent(shost->dma_dev,
1022 SECTOR_SIZE * AHA1542_MAX_SECTORS,
1023 &acmd->data_buffer_handle, GFP_KERNEL);
1024 if (!acmd->data_buffer)
1025 return -ENOMEM;
1026 return 0;
1027 }
1028
aha1542_exit_cmd_priv(struct Scsi_Host * shost,struct scsi_cmnd * cmd)1029 static int aha1542_exit_cmd_priv(struct Scsi_Host *shost, struct scsi_cmnd *cmd)
1030 {
1031 struct aha1542_cmd *acmd = scsi_cmd_priv(cmd);
1032
1033 dma_free_coherent(shost->dma_dev, SECTOR_SIZE * AHA1542_MAX_SECTORS,
1034 acmd->data_buffer, acmd->data_buffer_handle);
1035 return 0;
1036 }
1037
1038 static const struct scsi_host_template driver_template = {
1039 .module = THIS_MODULE,
1040 .proc_name = "aha1542",
1041 .name = "Adaptec 1542",
1042 .cmd_size = sizeof(struct aha1542_cmd),
1043 .queuecommand = aha1542_queuecommand,
1044 .eh_device_reset_handler= aha1542_dev_reset,
1045 .eh_bus_reset_handler = aha1542_bus_reset,
1046 .eh_host_reset_handler = aha1542_host_reset,
1047 .bios_param = aha1542_biosparam,
1048 .init_cmd_priv = aha1542_init_cmd_priv,
1049 .exit_cmd_priv = aha1542_exit_cmd_priv,
1050 .can_queue = AHA1542_MAILBOXES,
1051 .this_id = 7,
1052 .max_sectors = AHA1542_MAX_SECTORS,
1053 .sg_tablesize = SG_ALL,
1054 };
1055
aha1542_isa_match(struct device * pdev,unsigned int ndev)1056 static int aha1542_isa_match(struct device *pdev, unsigned int ndev)
1057 {
1058 struct Scsi_Host *sh = aha1542_hw_init(&driver_template, pdev, ndev);
1059
1060 if (!sh)
1061 return 0;
1062
1063 dev_set_drvdata(pdev, sh);
1064 return 1;
1065 }
1066
aha1542_isa_remove(struct device * pdev,unsigned int ndev)1067 static void aha1542_isa_remove(struct device *pdev,
1068 unsigned int ndev)
1069 {
1070 aha1542_release(dev_get_drvdata(pdev));
1071 dev_set_drvdata(pdev, NULL);
1072 }
1073
1074 static struct isa_driver aha1542_isa_driver = {
1075 .match = aha1542_isa_match,
1076 .remove = aha1542_isa_remove,
1077 .driver = {
1078 .name = "aha1542"
1079 },
1080 };
1081 static int isa_registered;
1082
1083 #ifdef CONFIG_PNP
1084 static const struct pnp_device_id aha1542_pnp_ids[] = {
1085 { .id = "ADP1542" },
1086 { .id = "" }
1087 };
1088 MODULE_DEVICE_TABLE(pnp, aha1542_pnp_ids);
1089
aha1542_pnp_probe(struct pnp_dev * pdev,const struct pnp_device_id * id)1090 static int aha1542_pnp_probe(struct pnp_dev *pdev, const struct pnp_device_id *id)
1091 {
1092 int indx;
1093 struct Scsi_Host *sh;
1094
1095 for (indx = 0; indx < ARRAY_SIZE(io); indx++) {
1096 if (io[indx])
1097 continue;
1098
1099 if (pnp_activate_dev(pdev) < 0)
1100 continue;
1101
1102 io[indx] = pnp_port_start(pdev, 0);
1103
1104 /*
1105 * The card can be queried for its DMA, we have
1106 * the DMA set up that is enough
1107 */
1108
1109 dev_info(&pdev->dev, "ISAPnP found an AHA1535 at I/O 0x%03X", io[indx]);
1110 }
1111
1112 sh = aha1542_hw_init(&driver_template, &pdev->dev, indx);
1113 if (!sh)
1114 return -ENODEV;
1115
1116 pnp_set_drvdata(pdev, sh);
1117 return 0;
1118 }
1119
aha1542_pnp_remove(struct pnp_dev * pdev)1120 static void aha1542_pnp_remove(struct pnp_dev *pdev)
1121 {
1122 aha1542_release(pnp_get_drvdata(pdev));
1123 pnp_set_drvdata(pdev, NULL);
1124 }
1125
1126 static struct pnp_driver aha1542_pnp_driver = {
1127 .name = "aha1542",
1128 .id_table = aha1542_pnp_ids,
1129 .probe = aha1542_pnp_probe,
1130 .remove = aha1542_pnp_remove,
1131 };
1132 static int pnp_registered;
1133 #endif /* CONFIG_PNP */
1134
aha1542_init(void)1135 static int __init aha1542_init(void)
1136 {
1137 int ret = 0;
1138
1139 #ifdef CONFIG_PNP
1140 if (isapnp) {
1141 ret = pnp_register_driver(&aha1542_pnp_driver);
1142 if (!ret)
1143 pnp_registered = 1;
1144 }
1145 #endif
1146 ret = isa_register_driver(&aha1542_isa_driver, MAXBOARDS);
1147 if (!ret)
1148 isa_registered = 1;
1149
1150 #ifdef CONFIG_PNP
1151 if (pnp_registered)
1152 ret = 0;
1153 #endif
1154 if (isa_registered)
1155 ret = 0;
1156
1157 return ret;
1158 }
1159
aha1542_exit(void)1160 static void __exit aha1542_exit(void)
1161 {
1162 #ifdef CONFIG_PNP
1163 if (pnp_registered)
1164 pnp_unregister_driver(&aha1542_pnp_driver);
1165 #endif
1166 if (isa_registered)
1167 isa_unregister_driver(&aha1542_isa_driver);
1168 }
1169
1170 module_init(aha1542_init);
1171 module_exit(aha1542_exit);
1172