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fs: use kmem_cache_zalloc instead
[pv_ops_mirror.git] / drivers / scsi / eata_pio.c
blob96180bb47e4189c3fa8304df15fc52d520689915
1 /************************************************************
2 * *
3 * Linux EATA SCSI PIO driver *
4 * *
5 * based on the CAM document CAM/89-004 rev. 2.0c, *
6 * DPT's driver kit, some internal documents and source, *
7 * and several other Linux scsi drivers and kernel docs. *
8 * *
9 * The driver currently: *
10 * -supports all EATA-PIO boards *
11 * -only supports DASD devices *
12 * *
13 * (c)1993-96 Michael Neuffer, Alfred Arnold *
14 * neuffer@goofy.zdv.uni-mainz.de *
15 * a.arnold@kfa-juelich.de *
16 * *
17 * Updated 2002 by Alan Cox <alan@redhat.com> for Linux *
18 * 2.5.x and the newer locking and error handling *
19 * *
20 * This program is free software; you can redistribute it *
21 * and/or modify it under the terms of the GNU General *
22 * Public License as published by the Free Software *
23 * Foundation; either version 2 of the License, or *
24 * (at your option) any later version. *
25 * *
26 * This program is distributed in the hope that it will be *
27 * useful, but WITHOUT ANY WARRANTY; without even the *
28 * implied warranty of MERCHANTABILITY or FITNESS FOR A *
29 * PARTICULAR PURPOSE. See the GNU General Public License *
30 * for more details. *
31 * *
32 * You should have received a copy of the GNU General *
33 * Public License along with this kernel; if not, write to *
34 * the Free Software Foundation, Inc., 675 Mass Ave, *
35 * Cambridge, MA 02139, USA. *
36 * *
37 * For the avoidance of doubt the "preferred form" of this *
38 * code is one which is in an open non patent encumbered *
39 * format. Where cryptographic key signing forms part of *
40 * the process of creating an executable the information *
41 * including keys needed to generate an equivalently *
42 * functional executable are deemed to be part of the *
43 * source code are deemed to be part of the source code. *
44 * *
45 ************************************************************
46 * last change: 2002/11/02 OS: Linux 2.5.45 *
47 ************************************************************/
48
49 #include <linux/module.h>
50 #include <linux/kernel.h>
51 #include <linux/string.h>
52 #include <linux/ioport.h>
53 #include <linux/slab.h>
54 #include <linux/in.h>
55 #include <linux/pci.h>
56 #include <linux/proc_fs.h>
57 #include <linux/interrupt.h>
58 #include <linux/blkdev.h>
59 #include <linux/spinlock.h>
60 #include <linux/delay.h>
61
62 #include <asm/io.h>
63
64 #include <scsi/scsi.h>
65 #include <scsi/scsi_cmnd.h>
66 #include <scsi/scsi_device.h>
67 #include <scsi/scsi_host.h>
68
69 #include "eata_generic.h"
70 #include "eata_pio.h"
71
72
73 static unsigned int ISAbases[MAXISA] = {
74 0x1F0, 0x170, 0x330, 0x230
75 };
76
77 static unsigned int ISAirqs[MAXISA] = {
78 14, 12, 15, 11
79 };
80
81 static unsigned char EISAbases[] = {
82 1, 1, 1, 1, 1, 1, 1, 1,
83 1, 1, 1, 1, 1, 1, 1, 1
84 };
85
86 static unsigned int registered_HBAs;
87 static struct Scsi_Host *last_HBA;
88 static struct Scsi_Host *first_HBA;
89 static unsigned char reg_IRQ[16];
90 static unsigned char reg_IRQL[16];
91 static unsigned long int_counter;
92 static unsigned long queue_counter;
93
94 static struct scsi_host_template driver_template;
95
96 /*
97 * eata_proc_info
98 * inout : decides on the direction of the dataflow and the meaning of the
99 * variables
100 * buffer: If inout==FALSE data is being written to it else read from it
101 * *start: If inout==FALSE start of the valid data in the buffer
102 * offset: If inout==FALSE offset from the beginning of the imaginary file
103 * from which we start writing into the buffer
104 * length: If inout==FALSE max number of bytes to be written into the buffer
105 * else number of bytes in the buffer
106 */
107 static int eata_pio_proc_info(struct Scsi_Host *shost, char *buffer, char **start, off_t offset,
108 int length, int rw)
109 {
110 int len = 0;
111 off_t begin = 0, pos = 0;
112
113 if (rw)
114 return -ENOSYS;
115
116 len += sprintf(buffer+len, "EATA (Extended Attachment) PIO driver version: "
117 "%d.%d%s\n",VER_MAJOR, VER_MINOR, VER_SUB);
118 len += sprintf(buffer + len, "queued commands: %10ld\n"
119 "processed interrupts:%10ld\n", queue_counter, int_counter);
120 len += sprintf(buffer + len, "\nscsi%-2d: HBA %.10s\n",
121 shost->host_no, SD(shost)->name);
122 len += sprintf(buffer + len, "Firmware revision: v%s\n",
123 SD(shost)->revision);
124 len += sprintf(buffer + len, "IO: PIO\n");
125 len += sprintf(buffer + len, "Base IO : %#.4x\n", (u32) shost->base);
126 len += sprintf(buffer + len, "Host Bus: %s\n",
127 (SD(shost)->bustype == 'P')?"PCI ":
128 (SD(shost)->bustype == 'E')?"EISA":"ISA ");
129
130 pos = begin + len;
131
132 if (pos < offset) {
133 len = 0;
134 begin = pos;
135 }
136 if (pos > offset + length)
137 goto stop_output;
138
139 stop_output:
140 DBG(DBG_PROC, printk("2pos: %ld offset: %ld len: %d\n", pos, offset, len));
141 *start = buffer + (offset - begin); /* Start of wanted data */
142 len -= (offset - begin); /* Start slop */
143 if (len > length)
144 len = length; /* Ending slop */
145 DBG(DBG_PROC, printk("3pos: %ld offset: %ld len: %d\n", pos, offset, len));
146
147 return len;
148 }
149
150 static int eata_pio_release(struct Scsi_Host *sh)
151 {
152 hostdata *hd = SD(sh);
153 if (sh->irq && reg_IRQ[sh->irq] == 1)
154 free_irq(sh->irq, NULL);
155 else
156 reg_IRQ[sh->irq]--;
157 if (SD(sh)->channel == 0) {
158 if (sh->io_port && sh->n_io_port)
159 release_region(sh->io_port, sh->n_io_port);
160 }
161 /* At this point the PCI reference can go */
162 if (hd->pdev)
163 pci_dev_put(hd->pdev);
164 return 1;
165 }
166
167 static void IncStat(struct scsi_pointer *SCp, unsigned int Increment)
168 {
169 SCp->ptr += Increment;
170 if ((SCp->this_residual -= Increment) == 0) {
171 if ((--SCp->buffers_residual) == 0)
172 SCp->Status = 0;
173 else {
174 SCp->buffer++;
175 SCp->ptr = page_address(SCp->buffer->page) + SCp->buffer->offset;
176 SCp->this_residual = SCp->buffer->length;
177 }
178 }
179 }
180
181 static irqreturn_t eata_pio_int_handler(int irq, void *dev_id);
182
183 static irqreturn_t do_eata_pio_int_handler(int irq, void *dev_id)
184 {
185 unsigned long flags;
186 struct Scsi_Host *dev = dev_id;
187 irqreturn_t ret;
188
189 spin_lock_irqsave(dev->host_lock, flags);
190 ret = eata_pio_int_handler(irq, dev_id);
191 spin_unlock_irqrestore(dev->host_lock, flags);
192 return ret;
193 }
194
195 static irqreturn_t eata_pio_int_handler(int irq, void *dev_id)
196 {
197 unsigned int eata_stat = 0xfffff;
198 struct scsi_cmnd *cmd;
199 hostdata *hd;
200 struct eata_ccb *cp;
201 unsigned long base;
202 unsigned int x, z;
203 struct Scsi_Host *sh;
204 unsigned short zwickel = 0;
205 unsigned char stat, odd;
206 irqreturn_t ret = IRQ_NONE;
207
208 for (x = 1, sh = first_HBA; x <= registered_HBAs; x++, sh = SD(sh)->prev)
209 {
210 if (sh->irq != irq)
211 continue;
212 if (inb(sh->base + HA_RSTATUS) & HA_SBUSY)
213 continue;
214
215 int_counter++;
216 ret = IRQ_HANDLED;
217
218 hd = SD(sh);
219
220 cp = &hd->ccb[0];
221 cmd = cp->cmd;
222 base = cmd->device->host->base;
223
224 do {
225 stat = inb(base + HA_RSTATUS);
226 if (stat & HA_SDRQ) {
227 if (cp->DataIn) {
228 z = 256;
229 odd = 0;
230 while ((cmd->SCp.Status) && ((z > 0) || (odd))) {
231 if (odd) {
232 *(cmd->SCp.ptr) = zwickel >> 8;
233 IncStat(&cmd->SCp, 1);
234 odd = 0;
235 }
236 x = min_t(unsigned int, z, cmd->SCp.this_residual / 2);
237 insw(base + HA_RDATA, cmd->SCp.ptr, x);
238 z -= x;
239 IncStat(&cmd->SCp, 2 * x);
240 if ((z > 0) && (cmd->SCp.this_residual == 1)) {
241 zwickel = inw(base + HA_RDATA);
242 *(cmd->SCp.ptr) = zwickel & 0xff;
243 IncStat(&cmd->SCp, 1);
244 z--;
245 odd = 1;
246 }
247 }
248 while (z > 0) {
249 zwickel = inw(base + HA_RDATA);
250 z--;
251 }
252 } else { /* cp->DataOut */
253
254 odd = 0;
255 z = 256;
256 while ((cmd->SCp.Status) && ((z > 0) || (odd))) {
257 if (odd) {
258 zwickel += *(cmd->SCp.ptr) << 8;
259 IncStat(&cmd->SCp, 1);
260 outw(zwickel, base + HA_RDATA);
261 z--;
262 odd = 0;
263 }
264 x = min_t(unsigned int, z, cmd->SCp.this_residual / 2);
265 outsw(base + HA_RDATA, cmd->SCp.ptr, x);
266 z -= x;
267 IncStat(&cmd->SCp, 2 * x);
268 if ((z > 0) && (cmd->SCp.this_residual == 1)) {
269 zwickel = *(cmd->SCp.ptr);
270 zwickel &= 0xff;
271 IncStat(&cmd->SCp, 1);
272 odd = 1;
273 }
274 }
275 while (z > 0 || odd) {
276 outw(zwickel, base + HA_RDATA);
277 z--;
278 odd = 0;
279 }
280 }
281 }
282 }
283 while ((stat & HA_SDRQ) || ((stat & HA_SMORE) && hd->moresupport));
284
285 /* terminate handler if HBA goes busy again, i.e. transfers
286 * more data */
287
288 if (stat & HA_SBUSY)
289 break;
290
291 /* OK, this is quite stupid, but I haven't found any correct
292 * way to get HBA&SCSI status so far */
293
294 if (!(inb(base + HA_RSTATUS) & HA_SERROR)) {
295 cmd->result = (DID_OK << 16);
296 hd->devflags |= (1 << cp->cp_id);
297 } else if (hd->devflags & (1 << cp->cp_id))
298 cmd->result = (DID_OK << 16) + 0x02;
299 else
300 cmd->result = (DID_NO_CONNECT << 16);
301
302 if (cp->status == LOCKED) {
303 cp->status = FREE;
304 eata_stat = inb(base + HA_RSTATUS);
305 printk(KERN_CRIT "eata_pio: int_handler, freeing locked " "queueslot\n");
306 return ret;
307 }
308 #if DBG_INTR2
309 if (stat != 0x50)
310 printk(KERN_DEBUG "stat: %#.2x, result: %#.8x\n", stat, cmd->result);
311 #endif
312
313 cp->status = FREE; /* now we can release the slot */
314
315 cmd->scsi_done(cmd);
316 }
317
318 return ret;
319 }
320
321 static inline unsigned int eata_pio_send_command(unsigned long base, unsigned char command)
322 {
323 unsigned int loop = 50;
324
325 while (inb(base + HA_RSTATUS) & HA_SBUSY)
326 if (--loop == 0)
327 return 1;
328
329 /* Enable interrupts for HBA. It is not the best way to do it at this
330 * place, but I hope that it doesn't interfere with the IDE driver
331 * initialization this way */
332
333 outb(HA_CTRL_8HEADS, base + HA_CTRLREG);
334
335 outb(command, base + HA_WCOMMAND);
336 return 0;
337 }
338
339 static int eata_pio_queue(struct scsi_cmnd *cmd,
340 void (*done)(struct scsi_cmnd *))
341 {
342 unsigned int x, y;
343 unsigned long base;
344
345 hostdata *hd;
346 struct Scsi_Host *sh;
347 struct eata_ccb *cp;
348
349 queue_counter++;
350
351 hd = HD(cmd);
352 sh = cmd->device->host;
353 base = sh->base;
354
355 /* use only slot 0, as 2001 can handle only one cmd at a time */
356
357 y = x = 0;
358
359 if (hd->ccb[y].status != FREE) {
360
361 DBG(DBG_QUEUE, printk(KERN_EMERG "can_queue %d, x %d, y %d\n", sh->can_queue, x, y));
362 #if DEBUG_EATA
363 panic(KERN_EMERG "eata_pio: run out of queue slots cmdno:%ld " "intrno: %ld\n", queue_counter, int_counter);
364 #else
365 panic(KERN_EMERG "eata_pio: run out of queue slots....\n");
366 #endif
367 }
368
369 cp = &hd->ccb[y];
370
371 memset(cp, 0, sizeof(struct eata_ccb));
372 memset(cmd->sense_buffer, 0, sizeof(cmd->sense_buffer));
373
374 cp->status = USED; /* claim free slot */
375
376 DBG(DBG_QUEUE, scmd_printk(KERN_DEBUG, cmd,
377 "eata_pio_queue pid %ld, y %d\n",
378 cmd->serial_number, y));
379
380 cmd->scsi_done = (void *) done;
381
382 if (cmd->sc_data_direction == DMA_TO_DEVICE)
383 cp->DataOut = 1; /* Output mode */
384 else
385 cp->DataIn = 0; /* Input mode */
386
387 cp->Interpret = (cmd->device->id == hd->hostid);
388 cp->cp_datalen = cpu_to_be32(cmd->request_bufflen);
389 cp->Auto_Req_Sen = 0;
390 cp->cp_reqDMA = 0;
391 cp->reqlen = 0;
392
393 cp->cp_id = cmd->device->id;
394 cp->cp_lun = cmd->device->lun;
395 cp->cp_dispri = 0;
396 cp->cp_identify = 1;
397 memcpy(cp->cp_cdb, cmd->cmnd, COMMAND_SIZE(*cmd->cmnd));
398
399 cp->cp_statDMA = 0;
400
401 cp->cp_viraddr = cp;
402 cp->cmd = cmd;
403 cmd->host_scribble = (char *) &hd->ccb[y];
404
405 if (cmd->use_sg == 0) {
406 cmd->SCp.buffers_residual = 1;
407 cmd->SCp.ptr = cmd->request_buffer;
408 cmd->SCp.this_residual = cmd->request_bufflen;
409 cmd->SCp.buffer = NULL;
410 } else {
411 cmd->SCp.buffer = cmd->request_buffer;
412 cmd->SCp.buffers_residual = cmd->use_sg;
413 cmd->SCp.ptr = page_address(cmd->SCp.buffer->page) + cmd->SCp.buffer->offset;
414 cmd->SCp.this_residual = cmd->SCp.buffer->length;
415 }
416 cmd->SCp.Status = (cmd->SCp.this_residual != 0); /* TRUE as long as bytes
417 * are to transfer */
418
419 if (eata_pio_send_command(base, EATA_CMD_PIO_SEND_CP)) {
420 cmd->result = DID_BUS_BUSY << 16;
421 scmd_printk(KERN_NOTICE, cmd,
422 "eata_pio_queue pid %ld, HBA busy, "
423 "returning DID_BUS_BUSY, done.\n", cmd->serial_number);
424 done(cmd);
425 cp->status = FREE;
426 return 0;
427 }
428 /* FIXME: timeout */
429 while (!(inb(base + HA_RSTATUS) & HA_SDRQ))
430 cpu_relax();
431 outsw(base + HA_RDATA, cp, hd->cplen);
432 outb(EATA_CMD_PIO_TRUNC, base + HA_WCOMMAND);
433 for (x = 0; x < hd->cppadlen; x++)
434 outw(0, base + HA_RDATA);
435
436 DBG(DBG_QUEUE, scmd_printk(KERN_DEBUG, cmd,
437 "Queued base %#.4lx pid: %ld "
438 "slot %d irq %d\n", sh->base, cmd->serial_number, y, sh->irq));
439
440 return 0;
441 }
442
443 static int eata_pio_abort(struct scsi_cmnd *cmd)
444 {
445 unsigned int loop = 100;
446
447 DBG(DBG_ABNORM, scmd_printk(KERN_WARNING, cmd,
448 "eata_pio_abort called pid: %ld\n",
449 cmd->serial_number));
450
451 while (inb(cmd->device->host->base + HA_RAUXSTAT) & HA_ABUSY)
452 if (--loop == 0) {
453 printk(KERN_WARNING "eata_pio: abort, timeout error.\n");
454 return FAILED;
455 }
456 if (CD(cmd)->status == FREE) {
457 DBG(DBG_ABNORM, printk(KERN_WARNING "Returning: SCSI_ABORT_NOT_RUNNING\n"));
458 return FAILED;
459 }
460 if (CD(cmd)->status == USED) {
461 DBG(DBG_ABNORM, printk(KERN_WARNING "Returning: SCSI_ABORT_BUSY\n"));
462 /* We want to sleep a bit more here */
463 return FAILED; /* SNOOZE */
464 }
465 if (CD(cmd)->status == RESET) {
466 printk(KERN_WARNING "eata_pio: abort, command reset error.\n");
467 return FAILED;
468 }
469 if (CD(cmd)->status == LOCKED) {
470 DBG(DBG_ABNORM, printk(KERN_WARNING "eata_pio: abort, queue slot " "locked.\n"));
471 return FAILED;
472 }
473 panic("eata_pio: abort: invalid slot status\n");
474 }
475
476 static int eata_pio_host_reset(struct scsi_cmnd *cmd)
477 {
478 unsigned int x, limit = 0;
479 unsigned char success = 0;
480 struct scsi_cmnd *sp;
481 struct Scsi_Host *host = cmd->device->host;
482
483 DBG(DBG_ABNORM, scmd_printk(KERN_WARNING, cmd,
484 "eata_pio_reset called pid:%ld\n",
485 cmd->serial_number));
486
487 spin_lock_irq(host->host_lock);
488
489 if (HD(cmd)->state == RESET) {
490 printk(KERN_WARNING "eata_pio_reset: exit, already in reset.\n");
491 spin_unlock_irq(host->host_lock);
492 return FAILED;
493 }
494
495 /* force all slots to be free */
496
497 for (x = 0; x < cmd->device->host->can_queue; x++) {
498
499 if (HD(cmd)->ccb[x].status == FREE)
500 continue;
501
502 sp = HD(cmd)->ccb[x].cmd;
503 HD(cmd)->ccb[x].status = RESET;
504 printk(KERN_WARNING "eata_pio_reset: slot %d in reset, pid %ld.\n", x, sp->serial_number);
505
506 if (sp == NULL)
507 panic("eata_pio_reset: slot %d, sp==NULL.\n", x);
508 }
509
510 /* hard reset the HBA */
511 outb(EATA_CMD_RESET, cmd->device->host->base + HA_WCOMMAND);
512
513 DBG(DBG_ABNORM, printk(KERN_WARNING "eata_pio_reset: board reset done.\n"));
514 HD(cmd)->state = RESET;
515
516 spin_unlock_irq(host->host_lock);
517 msleep(3000);
518 spin_lock_irq(host->host_lock);
519
520 DBG(DBG_ABNORM, printk(KERN_WARNING "eata_pio_reset: interrupts disabled, " "loops %d.\n", limit));
521
522 for (x = 0; x < cmd->device->host->can_queue; x++) {
523
524 /* Skip slots already set free by interrupt */
525 if (HD(cmd)->ccb[x].status != RESET)
526 continue;
527
528 sp = HD(cmd)->ccb[x].cmd;
529 sp->result = DID_RESET << 16;
530
531 /* This mailbox is terminated */
532 printk(KERN_WARNING "eata_pio_reset: reset ccb %d.\n", x);
533 HD(cmd)->ccb[x].status = FREE;
534
535 sp->scsi_done(sp);
536 }
537
538 HD(cmd)->state = 0;
539
540 spin_unlock_irq(host->host_lock);
541
542 if (success) { /* hmmm... */
543 DBG(DBG_ABNORM, printk(KERN_WARNING "eata_pio_reset: exit, success.\n"));
544 return SUCCESS;
545 } else {
546 DBG(DBG_ABNORM, printk(KERN_WARNING "eata_pio_reset: exit, wakeup.\n"));
547 return FAILED;
548 }
549 }
550
551 static char *get_pio_board_data(unsigned long base, unsigned int irq, unsigned int id, unsigned long cplen, unsigned short cppadlen)
552 {
553 struct eata_ccb cp;
554 static char buff[256];
555 int z;
556
557 memset(&cp, 0, sizeof(struct eata_ccb));
558 memset(buff, 0, sizeof(buff));
559
560 cp.DataIn = 1;
561 cp.Interpret = 1; /* Interpret command */
562
563 cp.cp_datalen = cpu_to_be32(254);
564 cp.cp_dataDMA = cpu_to_be32(0);
565
566 cp.cp_id = id;
567 cp.cp_lun = 0;
568
569 cp.cp_cdb[0] = INQUIRY;
570 cp.cp_cdb[1] = 0;
571 cp.cp_cdb[2] = 0;
572 cp.cp_cdb[3] = 0;
573 cp.cp_cdb[4] = 254;
574 cp.cp_cdb[5] = 0;
575
576 if (eata_pio_send_command(base, EATA_CMD_PIO_SEND_CP))
577 return NULL;
578
579 while (!(inb(base + HA_RSTATUS) & HA_SDRQ))
580 cpu_relax();
581
582 outsw(base + HA_RDATA, &cp, cplen);
583 outb(EATA_CMD_PIO_TRUNC, base + HA_WCOMMAND);
584 for (z = 0; z < cppadlen; z++)
585 outw(0, base + HA_RDATA);
586
587 while (inb(base + HA_RSTATUS) & HA_SBUSY)
588 cpu_relax();
589
590 if (inb(base + HA_RSTATUS) & HA_SERROR)
591 return NULL;
592 else if (!(inb(base + HA_RSTATUS) & HA_SDRQ))
593 return NULL;
594 else {
595 insw(base + HA_RDATA, &buff, 127);
596 while (inb(base + HA_RSTATUS) & HA_SDRQ)
597 inw(base + HA_RDATA);
598 return buff;
599 }
600 }
601
602 static int get_pio_conf_PIO(unsigned long base, struct get_conf *buf)
603 {
604 unsigned long loop = HZ / 2;
605 int z;
606 unsigned short *p;
607
608 if (!request_region(base, 9, "eata_pio"))
609 return 0;
610
611 memset(buf, 0, sizeof(struct get_conf));
612
613 while (inb(base + HA_RSTATUS) & HA_SBUSY)
614 if (--loop == 0)
615 goto fail;
616
617 DBG(DBG_PIO && DBG_PROBE, printk(KERN_DEBUG "Issuing PIO READ CONFIG to HBA at %#lx\n", base));
618 eata_pio_send_command(base, EATA_CMD_PIO_READ_CONFIG);
619
620 loop = 50;
621 for (p = (unsigned short *) buf; (long) p <= ((long) buf + (sizeof(struct get_conf) / 2)); p++) {
622 while (!(inb(base + HA_RSTATUS) & HA_SDRQ))
623 if (--loop == 0)
624 goto fail;
625
626 loop = 50;
627 *p = inw(base + HA_RDATA);
628 }
629 if (inb(base + HA_RSTATUS) & HA_SERROR) {
630 DBG(DBG_PROBE, printk("eata_dma: get_conf_PIO, error during "
631 "transfer for HBA at %lx\n", base));
632 goto fail;
633 }
634
635 if (cpu_to_be32(EATA_SIGNATURE) != buf->signature)
636 goto fail;
637
638 DBG(DBG_PIO && DBG_PROBE, printk(KERN_NOTICE "EATA Controller found "
639 "at %#4lx EATA Level: %x\n",
640 base, (unsigned int) (buf->version)));
641
642 while (inb(base + HA_RSTATUS) & HA_SDRQ)
643 inw(base + HA_RDATA);
644
645 if (!ALLOW_DMA_BOARDS) {
646 for (z = 0; z < MAXISA; z++)
647 if (base == ISAbases[z]) {
648 buf->IRQ = ISAirqs[z];
649 break;
650 }
651 }
652
653 return 1;
654
655 fail:
656 release_region(base, 9);
657 return 0;
658 }
659
660 static void print_pio_config(struct get_conf *gc)
661 {
662 printk("Please check values: (read config data)\n");
663 printk("LEN: %d ver:%d OCS:%d TAR:%d TRNXFR:%d MORES:%d\n", be32_to_cpu(gc->len), gc->version, gc->OCS_enabled, gc->TAR_support, gc->TRNXFR, gc->MORE_support);
664 printk("HAAV:%d SCSIID0:%d ID1:%d ID2:%d QUEUE:%d SG:%d SEC:%d\n", gc->HAA_valid, gc->scsi_id[3], gc->scsi_id[2], gc->scsi_id[1], be16_to_cpu(gc->queuesiz), be16_to_cpu(gc->SGsiz), gc->SECOND);
665 printk("IRQ:%d IRQT:%d FORCADR:%d MCH:%d RIDQ:%d\n", gc->IRQ, gc->IRQ_TR, gc->FORCADR, gc->MAX_CHAN, gc->ID_qest);
666 }
667
668 static unsigned int print_selftest(unsigned int base)
669 {
670 unsigned char buffer[512];
671 #ifdef VERBOSE_SETUP
672 int z;
673 #endif
674
675 printk("eata_pio: executing controller self test & setup...\n");
676 while (inb(base + HA_RSTATUS) & HA_SBUSY);
677 outb(EATA_CMD_PIO_SETUPTEST, base + HA_WCOMMAND);
678 do {
679 while (inb(base + HA_RSTATUS) & HA_SBUSY)
680 /* nothing */ ;
681 if (inb(base + HA_RSTATUS) & HA_SDRQ) {
682 insw(base + HA_RDATA, &buffer, 256);
683 #ifdef VERBOSE_SETUP
684 /* no beeps please... */
685 for (z = 0; z < 511 && buffer[z]; z++)
686 if (buffer[z] != 7)
687 printk("%c", buffer[z]);
688 #endif
689 }
690 } while (inb(base + HA_RSTATUS) & (HA_SBUSY | HA_SDRQ));
691
692 return (!(inb(base + HA_RSTATUS) & HA_SERROR));
693 }
694
695 static int register_pio_HBA(long base, struct get_conf *gc, struct pci_dev *pdev)
696 {
697 unsigned long size = 0;
698 char *buff;
699 unsigned long cplen;
700 unsigned short cppadlen;
701 struct Scsi_Host *sh;
702 hostdata *hd;
703
704 DBG(DBG_REGISTER, print_pio_config(gc));
705
706 if (gc->DMA_support) {
707 printk("HBA at %#.4lx supports DMA. Please use EATA-DMA driver.\n", base);
708 if (!ALLOW_DMA_BOARDS)
709 return 0;
710 }
711
712 if ((buff = get_pio_board_data(base, gc->IRQ, gc->scsi_id[3], cplen = (cpu_to_be32(gc->cplen) + 1) / 2, cppadlen = (cpu_to_be16(gc->cppadlen) + 1) / 2)) == NULL) {
713 printk("HBA at %#lx didn't react on INQUIRY. Sorry.\n", base);
714 return 0;
715 }
716
717 if (!print_selftest(base) && !ALLOW_DMA_BOARDS) {
718 printk("HBA at %#lx failed while performing self test & setup.\n", base);
719 return 0;
720 }
721
722 size = sizeof(hostdata) + (sizeof(struct eata_ccb) * be16_to_cpu(gc->queuesiz));
723
724 sh = scsi_register(&driver_template, size);
725 if (sh == NULL)
726 return 0;
727
728 if (!reg_IRQ[gc->IRQ]) { /* Interrupt already registered ? */
729 if (!request_irq(gc->IRQ, do_eata_pio_int_handler, IRQF_DISABLED, "EATA-PIO", sh)) {
730 reg_IRQ[gc->IRQ]++;
731 if (!gc->IRQ_TR)
732 reg_IRQL[gc->IRQ] = 1; /* IRQ is edge triggered */
733 } else {
734 printk("Couldn't allocate IRQ %d, Sorry.\n", gc->IRQ);
735 return 0;
736 }
737 } else { /* More than one HBA on this IRQ */
738 if (reg_IRQL[gc->IRQ]) {
739 printk("Can't support more than one HBA on this IRQ,\n" " if the IRQ is edge triggered. Sorry.\n");
740 return 0;
741 } else
742 reg_IRQ[gc->IRQ]++;
743 }
744
745 hd = SD(sh);
746
747 memset(hd->ccb, 0, (sizeof(struct eata_ccb) * be16_to_cpu(gc->queuesiz)));
748 memset(hd->reads, 0, sizeof(hd->reads));
749
750 strlcpy(SD(sh)->vendor, &buff[8], sizeof(SD(sh)->vendor));
751 strlcpy(SD(sh)->name, &buff[16], sizeof(SD(sh)->name));
752 SD(sh)->revision[0] = buff[32];
753 SD(sh)->revision[1] = buff[33];
754 SD(sh)->revision[2] = buff[34];
755 SD(sh)->revision[3] = '.';
756 SD(sh)->revision[4] = buff[35];
757 SD(sh)->revision[5] = 0;
758
759 switch (be32_to_cpu(gc->len)) {
760 case 0x1c:
761 SD(sh)->EATA_revision = 'a';
762 break;
763 case 0x1e:
764 SD(sh)->EATA_revision = 'b';
765 break;
766 case 0x22:
767 SD(sh)->EATA_revision = 'c';
768 break;
769 case 0x24:
770 SD(sh)->EATA_revision = 'z';
771 default:
772 SD(sh)->EATA_revision = '?';
773 }
774
775 if (be32_to_cpu(gc->len) >= 0x22) {
776 if (gc->is_PCI)
777 hd->bustype = IS_PCI;
778 else if (gc->is_EISA)
779 hd->bustype = IS_EISA;
780 else
781 hd->bustype = IS_ISA;
782 } else {
783 if (buff[21] == '4')
784 hd->bustype = IS_PCI;
785 else if (buff[21] == '2')
786 hd->bustype = IS_EISA;
787 else
788 hd->bustype = IS_ISA;
789 }
790
791 SD(sh)->cplen = cplen;
792 SD(sh)->cppadlen = cppadlen;
793 SD(sh)->hostid = gc->scsi_id[3];
794 SD(sh)->devflags = 1 << gc->scsi_id[3];
795 SD(sh)->moresupport = gc->MORE_support;
796 sh->unique_id = base;
797 sh->base = base;
798 sh->io_port = base;
799 sh->n_io_port = 9;
800 sh->irq = gc->IRQ;
801 sh->dma_channel = PIO;
802 sh->this_id = gc->scsi_id[3];
803 sh->can_queue = 1;
804 sh->cmd_per_lun = 1;
805 sh->sg_tablesize = SG_ALL;
806
807 hd->channel = 0;
808
809 hd->pdev = pci_dev_get(pdev); /* Keep a PCI reference */
810
811 sh->max_id = 8;
812 sh->max_lun = 8;
813
814 if (gc->SECOND)
815 hd->primary = 0;
816 else
817 hd->primary = 1;
818
819 sh->unchecked_isa_dma = 0; /* We can only do PIO */
820
821 hd->next = NULL; /* build a linked list of all HBAs */
822 hd->prev = last_HBA;
823 if (hd->prev != NULL)
824 SD(hd->prev)->next = sh;
825 last_HBA = sh;
826 if (first_HBA == NULL)
827 first_HBA = sh;
828 registered_HBAs++;
829 return (1);
830 }
831
832 static void find_pio_ISA(struct get_conf *buf)
833 {
834 int i;
835
836 for (i = 0; i < MAXISA; i++) {
837 if (!ISAbases[i])
838 continue;
839 if (!get_pio_conf_PIO(ISAbases[i], buf))
840 continue;
841 if (!register_pio_HBA(ISAbases[i], buf, NULL))
842 release_region(ISAbases[i], 9);
843 else
844 ISAbases[i] = 0;
845 }
846 return;
847 }
848
849 static void find_pio_EISA(struct get_conf *buf)
850 {
851 u32 base;
852 int i;
853
854 #ifdef CHECKPAL
855 u8 pal1, pal2, pal3;
856 #endif
857
858 for (i = 0; i < MAXEISA; i++) {
859 if (EISAbases[i]) { /* Still a possibility ? */
860
861 base = 0x1c88 + (i * 0x1000);
862 #ifdef CHECKPAL
863 pal1 = inb((u16) base - 8);
864 pal2 = inb((u16) base - 7);
865 pal3 = inb((u16) base - 6);
866
867 if (((pal1 == 0x12) && (pal2 == 0x14)) || ((pal1 == 0x38) && (pal2 == 0xa3) && (pal3 == 0x82)) || ((pal1 == 0x06) && (pal2 == 0x94) && (pal3 == 0x24))) {
868 DBG(DBG_PROBE, printk(KERN_NOTICE "EISA EATA id tags found: " "%x %x %x \n", (int) pal1, (int) pal2, (int) pal3));
869 #endif
870 if (get_pio_conf_PIO(base, buf)) {
871 DBG(DBG_PROBE && DBG_EISA, print_pio_config(buf));
872 if (buf->IRQ) {
873 if (!register_pio_HBA(base, buf, NULL))
874 release_region(base, 9);
875 } else {
876 printk(KERN_NOTICE "eata_dma: No valid IRQ. HBA " "removed from list\n");
877 release_region(base, 9);
878 }
879 }
880 /* Nothing found here so we take it from the list */
881 EISAbases[i] = 0;
882 #ifdef CHECKPAL
883 }
884 #endif
885 }
886 }
887 return;
888 }
889
890 static void find_pio_PCI(struct get_conf *buf)
891 {
892 #ifndef CONFIG_PCI
893 printk("eata_dma: kernel PCI support not enabled. Skipping scan for PCI HBAs.\n");
894 #else
895 struct pci_dev *dev = NULL;
896 unsigned long base, x;
897
898 while ((dev = pci_get_device(PCI_VENDOR_ID_DPT, PCI_DEVICE_ID_DPT, dev)) != NULL) {
899 DBG(DBG_PROBE && DBG_PCI, printk("eata_pio: find_PCI, HBA at %s\n", pci_name(dev)));
900 if (pci_enable_device(dev))
901 continue;
902 pci_set_master(dev);
903 base = pci_resource_flags(dev, 0);
904 if (base & IORESOURCE_MEM) {
905 printk("eata_pio: invalid base address of device %s\n", pci_name(dev));
906 continue;
907 }
908 base = pci_resource_start(dev, 0);
909 /* EISA tag there ? */
910 if ((inb(base) == 0x12) && (inb(base + 1) == 0x14))
911 continue; /* Jep, it's forced, so move on */
912 base += 0x10; /* Now, THIS is the real address */
913 if (base != 0x1f8) {
914 /* We didn't find it in the primary search */
915 if (get_pio_conf_PIO(base, buf)) {
916 if (buf->FORCADR) { /* If the address is forced */
917 release_region(base, 9);
918 continue; /* we'll find it later */
919 }
920
921 /* OK. We made it till here, so we can go now
922 * and register it. We only have to check and
923 * eventually remove it from the EISA and ISA list
924 */
925
926 if (!register_pio_HBA(base, buf, dev)) {
927 release_region(base, 9);
928 continue;
929 }
930
931 if (base < 0x1000) {
932 for (x = 0; x < MAXISA; ++x) {
933 if (ISAbases[x] == base) {
934 ISAbases[x] = 0;
935 break;
936 }
937 }
938 } else if ((base & 0x0fff) == 0x0c88) {
939 x = (base >> 12) & 0x0f;
940 EISAbases[x] = 0;
941 }
942 }
943 #ifdef CHECK_BLINK
944 else if (check_blink_state(base)) {
945 printk("eata_pio: HBA is in BLINK state.\n" "Consult your HBAs manual to correct this.\n");
946 }
947 #endif
948 }
949 }
950 #endif /* #ifndef CONFIG_PCI */
951 }
952
953 static int eata_pio_detect(struct scsi_host_template *tpnt)
954 {
955 struct Scsi_Host *HBA_ptr;
956 struct get_conf gc;
957 int i;
958
959 find_pio_PCI(&gc);
960 find_pio_EISA(&gc);
961 find_pio_ISA(&gc);
962
963 for (i = 0; i <= MAXIRQ; i++)
964 if (reg_IRQ[i])
965 request_irq(i, do_eata_pio_int_handler, IRQF_DISABLED, "EATA-PIO", NULL);
966
967 HBA_ptr = first_HBA;
968
969 if (registered_HBAs != 0) {
970 printk("EATA (Extended Attachment) PIO driver version: %d.%d%s\n"
971 "(c) 1993-95 Michael Neuffer, neuffer@goofy.zdv.uni-mainz.de\n" " Alfred Arnold, a.arnold@kfa-juelich.de\n" "This release only supports DASD devices (harddisks)\n", VER_MAJOR, VER_MINOR, VER_SUB);
972
973 printk("Registered HBAs:\n");
974 printk("HBA no. Boardtype: Revis: EATA: Bus: BaseIO: IRQ: Ch: ID: Pr:" " QS: SG: CPL:\n");
975 for (i = 1; i <= registered_HBAs; i++) {
976 printk("scsi%-2d: %.10s v%s 2.0%c %s %#.4lx %2d %d %d %c"
977 " %2d %2d %2d\n",
978 HBA_ptr->host_no, SD(HBA_ptr)->name, SD(HBA_ptr)->revision,
979 SD(HBA_ptr)->EATA_revision, (SD(HBA_ptr)->bustype == 'P') ?
980 "PCI " : (SD(HBA_ptr)->bustype == 'E') ? "EISA" : "ISA ",
981 HBA_ptr->base, HBA_ptr->irq, SD(HBA_ptr)->channel, HBA_ptr->this_id,
982 SD(HBA_ptr)->primary ? 'Y' : 'N', HBA_ptr->can_queue,
983 HBA_ptr->sg_tablesize, HBA_ptr->cmd_per_lun);
984 HBA_ptr = SD(HBA_ptr)->next;
985 }
986 }
987 return (registered_HBAs);
988 }
989
990 static struct scsi_host_template driver_template = {
991 .proc_name = "eata_pio",
992 .name = "EATA (Extended Attachment) PIO driver",
993 .proc_info = eata_pio_proc_info,
994 .detect = eata_pio_detect,
995 .release = eata_pio_release,
996 .queuecommand = eata_pio_queue,
997 .eh_abort_handler = eata_pio_abort,
998 .eh_host_reset_handler = eata_pio_host_reset,
999 .use_clustering = ENABLE_CLUSTERING,
1000 };
1001
1002 MODULE_AUTHOR("Michael Neuffer, Alfred Arnold");
1003 MODULE_DESCRIPTION("EATA SCSI PIO driver");
1004 MODULE_LICENSE("GPL");
1005
1006 #include "scsi_module.c"
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