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[PARISC] Clean up compiler warning in pci.c
[linux-2.6/x86.git] / drivers / scsi / eata_pio.c
blob23beb48c79c58e62ddbda9498237e62c1aad6124
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/config.h>
50 #include <linux/module.h>
51 #include <linux/kernel.h>
52 #include <linux/sched.h>
53 #include <linux/string.h>
54 #include <linux/ioport.h>
55 #include <linux/slab.h>
56 #include <linux/in.h>
57 #include <linux/pci.h>
58 #include <linux/proc_fs.h>
59 #include <linux/interrupt.h>
60 #include <linux/blkdev.h>
61 #include <linux/spinlock.h>
62 #include <linux/delay.h>
63
64 #include <asm/io.h>
65
66 #include <scsi/scsi.h>
67 #include <scsi/scsi_cmnd.h>
68 #include <scsi/scsi_device.h>
69 #include <scsi/scsi_host.h>
70
71 #include "eata_generic.h"
72 #include "eata_pio.h"
73
74
75 static uint ISAbases[MAXISA] = {
76 0x1F0, 0x170, 0x330, 0x230
77 };
78
79 static uint ISAirqs[MAXISA] = {
80 14, 12, 15, 11
81 };
82
83 static unsigned char EISAbases[] = {
84 1, 1, 1, 1, 1, 1, 1, 1,
85 1, 1, 1, 1, 1, 1, 1, 1
86 };
87
88 static uint registered_HBAs;
89 static struct Scsi_Host *last_HBA;
90 static struct Scsi_Host *first_HBA;
91 static unsigned char reg_IRQ[16];
92 static unsigned char reg_IRQL[16];
93 static unsigned long int_counter;
94 static unsigned long queue_counter;
95
96 static struct scsi_host_template driver_template;
97
98 /*
99 * eata_proc_info
100 * inout : decides on the direction of the dataflow and the meaning of the
101 * variables
102 * buffer: If inout==FALSE data is being written to it else read from it
103 * *start: If inout==FALSE start of the valid data in the buffer
104 * offset: If inout==FALSE offset from the beginning of the imaginary file
105 * from which we start writing into the buffer
106 * length: If inout==FALSE max number of bytes to be written into the buffer
107 * else number of bytes in the buffer
108 */
109 static int eata_pio_proc_info(struct Scsi_Host *shost, char *buffer, char **start, off_t offset,
110 int length, int rw)
111 {
112 static u8 buff[512];
113 int size, len = 0;
114 off_t begin = 0, pos = 0;
115
116 if (rw)
117 return -ENOSYS;
118 if (offset == 0)
119 memset(buff, 0, sizeof(buff));
120
121 size = sprintf(buffer+len, "EATA (Extended Attachment) PIO driver version: "
122 "%d.%d%s\n",VER_MAJOR, VER_MINOR, VER_SUB);
123 len += size; pos = begin + len;
124 size = sprintf(buffer + len, "queued commands: %10ld\n"
125 "processed interrupts:%10ld\n", queue_counter, int_counter);
126 len += size; pos = begin + len;
127
128 size = sprintf(buffer + len, "\nscsi%-2d: HBA %.10s\n",
129 shost->host_no, SD(shost)->name);
130 len += size;
131 pos = begin + len;
132 size = sprintf(buffer + len, "Firmware revision: v%s\n",
133 SD(shost)->revision);
134 len += size;
135 pos = begin + len;
136 size = sprintf(buffer + len, "IO: PIO\n");
137 len += size;
138 pos = begin + len;
139 size = sprintf(buffer + len, "Base IO : %#.4x\n", (u32) shost->base);
140 len += size;
141 pos = begin + len;
142 size = sprintf(buffer + len, "Host Bus: %s\n",
143 (SD(shost)->bustype == 'P')?"PCI ":
144 (SD(shost)->bustype == 'E')?"EISA":"ISA ");
145
146 len += size;
147 pos = begin + len;
148
149 if (pos < offset) {
150 len = 0;
151 begin = pos;
152 }
153 if (pos > offset + length)
154 goto stop_output;
155
156 stop_output:
157 DBG(DBG_PROC, printk("2pos: %ld offset: %ld len: %d\n", pos, offset, len));
158 *start=buffer+(offset-begin); /* Start of wanted data */
159 len-=(offset-begin); /* Start slop */
160 if(len>length)
161 len = length; /* Ending slop */
162 DBG(DBG_PROC, printk("3pos: %ld offset: %ld len: %d\n", pos, offset, len));
163
164 return (len);
165 }
166
167 static int eata_pio_release(struct Scsi_Host *sh)
168 {
169 if (sh->irq && reg_IRQ[sh->irq] == 1)
170 free_irq(sh->irq, NULL);
171 else
172 reg_IRQ[sh->irq]--;
173 if (SD(sh)->channel == 0) {
174 if (sh->io_port && sh->n_io_port)
175 release_region(sh->io_port, sh->n_io_port);
176 }
177 return 1;
178 }
179
180 static void IncStat(struct scsi_pointer *SCp, uint Increment)
181 {
182 SCp->ptr += Increment;
183 if ((SCp->this_residual -= Increment) == 0) {
184 if ((--SCp->buffers_residual) == 0)
185 SCp->Status = 0;
186 else {
187 SCp->buffer++;
188 SCp->ptr = page_address(SCp->buffer->page) + SCp->buffer->offset;
189 SCp->this_residual = SCp->buffer->length;
190 }
191 }
192 }
193
194 static void eata_pio_int_handler(int irq, void *dev_id, struct pt_regs *regs);
195
196 static irqreturn_t do_eata_pio_int_handler(int irq, void *dev_id,
197 struct pt_regs *regs)
198 {
199 unsigned long flags;
200 struct Scsi_Host *dev = dev_id;
201
202 spin_lock_irqsave(dev->host_lock, flags);
203 eata_pio_int_handler(irq, dev_id, regs);
204 spin_unlock_irqrestore(dev->host_lock, flags);
205 return IRQ_HANDLED;
206 }
207
208 static void eata_pio_int_handler(int irq, void *dev_id, struct pt_regs *regs)
209 {
210 uint eata_stat = 0xfffff;
211 struct scsi_cmnd *cmd;
212 hostdata *hd;
213 struct eata_ccb *cp;
214 uint base;
215 uint x, z;
216 struct Scsi_Host *sh;
217 unsigned short zwickel = 0;
218 unsigned char stat, odd;
219
220 for (x = 1, sh = first_HBA; x <= registered_HBAs; x++, sh = SD(sh)->prev)
221 {
222 if (sh->irq != irq)
223 continue;
224 if (inb((uint) sh->base + HA_RSTATUS) & HA_SBUSY)
225 continue;
226
227 int_counter++;
228
229 hd = SD(sh);
230
231 cp = &hd->ccb[0];
232 cmd = cp->cmd;
233 base = (uint) cmd->device->host->base;
234
235 do {
236 stat = inb(base + HA_RSTATUS);
237 if (stat & HA_SDRQ) {
238 if (cp->DataIn) {
239 z = 256;
240 odd = 0;
241 while ((cmd->SCp.Status) && ((z > 0) || (odd))) {
242 if (odd) {
243 *(cmd->SCp.ptr) = zwickel >> 8;
244 IncStat(&cmd->SCp, 1);
245 odd = 0;
246 }
247 x = min_t(unsigned int, z, cmd->SCp.this_residual / 2);
248 insw(base + HA_RDATA, cmd->SCp.ptr, x);
249 z -= x;
250 IncStat(&cmd->SCp, 2 * x);
251 if ((z > 0) && (cmd->SCp.this_residual == 1)) {
252 zwickel = inw(base + HA_RDATA);
253 *(cmd->SCp.ptr) = zwickel & 0xff;
254 IncStat(&cmd->SCp, 1);
255 z--;
256 odd = 1;
257 }
258 }
259 while (z > 0) {
260 zwickel = inw(base + HA_RDATA);
261 z--;
262 }
263 } else { /* cp->DataOut */
264
265 odd = 0;
266 z = 256;
267 while ((cmd->SCp.Status) && ((z > 0) || (odd))) {
268 if (odd) {
269 zwickel += *(cmd->SCp.ptr) << 8;
270 IncStat(&cmd->SCp, 1);
271 outw(zwickel, base + HA_RDATA);
272 z--;
273 odd = 0;
274 }
275 x = min_t(unsigned int, z, cmd->SCp.this_residual / 2);
276 outsw(base + HA_RDATA, cmd->SCp.ptr, x);
277 z -= x;
278 IncStat(&cmd->SCp, 2 * x);
279 if ((z > 0) && (cmd->SCp.this_residual == 1)) {
280 zwickel = *(cmd->SCp.ptr);
281 zwickel &= 0xff;
282 IncStat(&cmd->SCp, 1);
283 odd = 1;
284 }
285 }
286 while (z > 0 || odd) {
287 outw(zwickel, base + HA_RDATA);
288 z--;
289 odd = 0;
290 }
291 }
292 }
293 }
294 while ((stat & HA_SDRQ) || ((stat & HA_SMORE) && hd->moresupport));
295
296 /* terminate handler if HBA goes busy again, i.e. transfers
297 * more data */
298
299 if (stat & HA_SBUSY)
300 break;
301
302 /* OK, this is quite stupid, but I haven't found any correct
303 * way to get HBA&SCSI status so far */
304
305 if (!(inb(base + HA_RSTATUS) & HA_SERROR)) {
306 cmd->result = (DID_OK << 16);
307 hd->devflags |= (1 << cp->cp_id);
308 } else if (hd->devflags & 1 << cp->cp_id)
309 cmd->result = (DID_OK << 16) + 0x02;
310 else
311 cmd->result = (DID_NO_CONNECT << 16);
312
313 if (cp->status == LOCKED) {
314 cp->status = FREE;
315 eata_stat = inb(base + HA_RSTATUS);
316 printk(KERN_CRIT "eata_pio: int_handler, freeing locked " "queueslot\n");
317 return;
318 }
319 #if DBG_INTR2
320 if (stat != 0x50)
321 printk(KERN_DEBUG "stat: %#.2x, result: %#.8x\n", stat, cmd->result);
322 #endif
323
324 cp->status = FREE; /* now we can release the slot */
325
326 cmd->scsi_done(cmd);
327 }
328
329 return;
330 }
331
332 static inline uint eata_pio_send_command(uint base, unsigned char command)
333 {
334 uint loop = HZ / 2;
335
336 while (inb(base + HA_RSTATUS) & HA_SBUSY)
337 if (--loop == 0)
338 return 1;
339
340 /* Enable interrupts for HBA. It is not the best way to do it at this
341 * place, but I hope that it doesn't interfere with the IDE driver
342 * initialization this way */
343
344 outb(HA_CTRL_8HEADS, base + HA_CTRLREG);
345
346 outb(command, base + HA_WCOMMAND);
347 return 0;
348 }
349
350 static int eata_pio_queue(struct scsi_cmnd *cmd,
351 void (*done)(struct scsi_cmnd *))
352 {
353 uint x, y;
354 uint base;
355
356 hostdata *hd;
357 struct Scsi_Host *sh;
358 struct eata_ccb *cp;
359
360 queue_counter++;
361
362 hd = HD(cmd);
363 sh = cmd->device->host;
364 base = (uint) sh->base;
365
366 /* use only slot 0, as 2001 can handle only one cmd at a time */
367
368 y = x = 0;
369
370 if (hd->ccb[y].status != FREE) {
371
372 DBG(DBG_QUEUE, printk(KERN_EMERG "can_queue %d, x %d, y %d\n", sh->can_queue, x, y));
373 #if DEBUG_EATA
374 panic(KERN_EMERG "eata_pio: run out of queue slots cmdno:%ld " "intrno: %ld\n", queue_counter, int_counter);
375 #else
376 panic(KERN_EMERG "eata_pio: run out of queue slots....\n");
377 #endif
378 }
379
380 cp = &hd->ccb[y];
381
382 memset(cp, 0, sizeof(struct eata_ccb));
383 memset(cmd->sense_buffer, 0, sizeof(cmd->sense_buffer));
384
385 cp->status = USED; /* claim free slot */
386
387 DBG(DBG_QUEUE, scmd_printk(KERN_DEBUG, cmd,
388 "eata_pio_queue pid %ld, y %d\n",
389 cmd->pid, y));
390
391 cmd->scsi_done = (void *) done;
392
393 if (cmd->sc_data_direction == DMA_TO_DEVICE)
394 cp->DataOut = 1; /* Output mode */
395 else
396 cp->DataIn = 0; /* Input mode */
397
398 cp->Interpret = (cmd->device->id == hd->hostid);
399 cp->cp_datalen = htonl((unsigned long) cmd->request_bufflen);
400 cp->Auto_Req_Sen = 0;
401 cp->cp_reqDMA = htonl(0);
402 cp->reqlen = 0;
403
404 cp->cp_id = cmd->device->id;
405 cp->cp_lun = cmd->device->lun;
406 cp->cp_dispri = 0;
407 cp->cp_identify = 1;
408 memcpy(cp->cp_cdb, cmd->cmnd, COMMAND_SIZE(*cmd->cmnd));
409
410 cp->cp_statDMA = htonl(0);
411
412 cp->cp_viraddr = cp;
413 cp->cmd = cmd;
414 cmd->host_scribble = (char *) &hd->ccb[y];
415
416 if (cmd->use_sg == 0) {
417 cmd->SCp.buffers_residual = 1;
418 cmd->SCp.ptr = cmd->request_buffer;
419 cmd->SCp.this_residual = cmd->request_bufflen;
420 cmd->SCp.buffer = NULL;
421 } else {
422 cmd->SCp.buffer = cmd->request_buffer;
423 cmd->SCp.buffers_residual = cmd->use_sg;
424 cmd->SCp.ptr = page_address(cmd->SCp.buffer->page) + cmd->SCp.buffer->offset;
425 cmd->SCp.this_residual = cmd->SCp.buffer->length;
426 }
427 cmd->SCp.Status = (cmd->SCp.this_residual != 0); /* TRUE as long as bytes
428 * are to transfer */
429
430 if (eata_pio_send_command(base, EATA_CMD_PIO_SEND_CP)) {
431 cmd->result = DID_BUS_BUSY << 16;
432 scmd_printk(KERN_NOTICE, cmd,
433 "eata_pio_queue pid %ld, HBA busy, "
434 "returning DID_BUS_BUSY, done.\n", cmd->pid);
435 done(cmd);
436 cp->status = FREE;
437 return (0);
438 }
439 /* FIXME: timeout */
440 while (!(inb(base + HA_RSTATUS) & HA_SDRQ))
441 cpu_relax();
442 outsw(base + HA_RDATA, cp, hd->cplen);
443 outb(EATA_CMD_PIO_TRUNC, base + HA_WCOMMAND);
444 for (x = 0; x < hd->cppadlen; x++)
445 outw(0, base + HA_RDATA);
446
447 DBG(DBG_QUEUE, scmd_printk(KERN_DEBUG, cmd,
448 "Queued base %#.4lx pid: %ld "
449 "slot %d irq %d\n", (long) sh->base, cmd->pid, y, sh->irq));
450
451 return (0);
452 }
453
454 static int eata_pio_abort(struct scsi_cmnd *cmd)
455 {
456 uint loop = HZ;
457
458 DBG(DBG_ABNORM, scmd_printk(KERN_WARNING, cmd,
459 "eata_pio_abort called pid: %ld\n",
460 cmd->pid));
461
462 while (inb(cmd->device->host->base + HA_RAUXSTAT) & HA_ABUSY)
463 if (--loop == 0) {
464 printk(KERN_WARNING "eata_pio: abort, timeout error.\n");
465 return FAILED;
466 }
467 if (CD(cmd)->status == FREE) {
468 DBG(DBG_ABNORM, printk(KERN_WARNING "Returning: SCSI_ABORT_NOT_RUNNING\n"));
469 return FAILED;
470 }
471 if (CD(cmd)->status == USED) {
472 DBG(DBG_ABNORM, printk(KERN_WARNING "Returning: SCSI_ABORT_BUSY\n"));
473 /* We want to sleep a bit more here */
474 return FAILED; /* SNOOZE */
475 }
476 if (CD(cmd)->status == RESET) {
477 printk(KERN_WARNING "eata_pio: abort, command reset error.\n");
478 return FAILED;
479 }
480 if (CD(cmd)->status == LOCKED) {
481 DBG(DBG_ABNORM, printk(KERN_WARNING "eata_pio: abort, queue slot " "locked.\n"));
482 return FAILED;
483 }
484 panic("eata_pio: abort: invalid slot status\n");
485 }
486
487 static int eata_pio_host_reset(struct scsi_cmnd *cmd)
488 {
489 uint x, limit = 0;
490 unsigned char success = 0;
491 struct scsi_cmnd *sp;
492 struct Scsi_Host *host = cmd->device->host;
493
494 DBG(DBG_ABNORM, scmd_printk(KERN_WARNING, cmd,
495 "eata_pio_reset called pid:%ld\n",
496 cmd->pid));
497
498 spin_lock_irq(host->host_lock);
499
500 if (HD(cmd)->state == RESET) {
501 printk(KERN_WARNING "eata_pio_reset: exit, already in reset.\n");
502 spin_unlock_irq(host->host_lock);
503 return FAILED;
504 }
505
506 /* force all slots to be free */
507
508 for (x = 0; x < cmd->device->host->can_queue; x++) {
509
510 if (HD(cmd)->ccb[x].status == FREE)
511 continue;
512
513 sp = HD(cmd)->ccb[x].cmd;
514 HD(cmd)->ccb[x].status = RESET;
515 printk(KERN_WARNING "eata_pio_reset: slot %d in reset, pid %ld.\n", x, sp->pid);
516
517 if (sp == NULL)
518 panic("eata_pio_reset: slot %d, sp==NULL.\n", x);
519 }
520
521 /* hard reset the HBA */
522 outb(EATA_CMD_RESET, (uint) cmd->device->host->base + HA_WCOMMAND);
523
524 DBG(DBG_ABNORM, printk(KERN_WARNING "eata_pio_reset: board reset done.\n"));
525 HD(cmd)->state = RESET;
526
527 spin_unlock_irq(host->host_lock);
528 msleep(3000);
529 spin_lock_irq(host->host_lock);
530
531 DBG(DBG_ABNORM, printk(KERN_WARNING "eata_pio_reset: interrupts disabled, " "loops %d.\n", limit));
532
533 for (x = 0; x < cmd->device->host->can_queue; x++) {
534
535 /* Skip slots already set free by interrupt */
536 if (HD(cmd)->ccb[x].status != RESET)
537 continue;
538
539 sp = HD(cmd)->ccb[x].cmd;
540 sp->result = DID_RESET << 16;
541
542 /* This mailbox is terminated */
543 printk(KERN_WARNING "eata_pio_reset: reset ccb %d.\n", x);
544 HD(cmd)->ccb[x].status = FREE;
545
546 sp->scsi_done(sp);
547 }
548
549 HD(cmd)->state = 0;
550
551 spin_unlock_irq(host->host_lock);
552
553 if (success) { /* hmmm... */
554 DBG(DBG_ABNORM, printk(KERN_WARNING "eata_pio_reset: exit, success.\n"));
555 return SUCCESS;
556 } else {
557 DBG(DBG_ABNORM, printk(KERN_WARNING "eata_pio_reset: exit, wakeup.\n"));
558 return FAILED;
559 }
560 }
561
562 static char *get_pio_board_data(unsigned long base, uint irq, uint id, unsigned long cplen, unsigned short cppadlen)
563 {
564 struct eata_ccb cp;
565 static char buff[256];
566 int z;
567
568 memset(&cp, 0, sizeof(struct eata_ccb));
569 memset(buff, 0, sizeof(buff));
570
571 cp.DataIn = 1;
572 cp.Interpret = 1; /* Interpret command */
573
574 cp.cp_datalen = htonl(254);
575 cp.cp_dataDMA = htonl(0);
576
577 cp.cp_id = id;
578 cp.cp_lun = 0;
579
580 cp.cp_cdb[0] = INQUIRY;
581 cp.cp_cdb[1] = 0;
582 cp.cp_cdb[2] = 0;
583 cp.cp_cdb[3] = 0;
584 cp.cp_cdb[4] = 254;
585 cp.cp_cdb[5] = 0;
586
587 if (eata_pio_send_command((uint) base, EATA_CMD_PIO_SEND_CP))
588 return (NULL);
589 while (!(inb(base + HA_RSTATUS) & HA_SDRQ));
590 outsw(base + HA_RDATA, &cp, cplen);
591 outb(EATA_CMD_PIO_TRUNC, base + HA_WCOMMAND);
592 for (z = 0; z < cppadlen; z++)
593 outw(0, base + HA_RDATA);
594
595 while (inb(base + HA_RSTATUS) & HA_SBUSY);
596 if (inb(base + HA_RSTATUS) & HA_SERROR)
597 return (NULL);
598 else if (!(inb(base + HA_RSTATUS) & HA_SDRQ))
599 return (NULL);
600 else {
601 insw(base + HA_RDATA, &buff, 127);
602 while (inb(base + HA_RSTATUS) & HA_SDRQ)
603 inw(base + HA_RDATA);
604 return (buff);
605 }
606 }
607
608 static int get_pio_conf_PIO(u32 base, struct get_conf *buf)
609 {
610 unsigned long loop = HZ / 2;
611 int z;
612 unsigned short *p;
613
614 if (!request_region(base, 9, "eata_pio"))
615 return 0;
616
617 memset(buf, 0, sizeof(struct get_conf));
618
619 while (inb(base + HA_RSTATUS) & HA_SBUSY)
620 if (--loop == 0)
621 goto fail;
622
623 DBG(DBG_PIO && DBG_PROBE, printk(KERN_DEBUG "Issuing PIO READ CONFIG to HBA at %#x\n", base));
624 eata_pio_send_command(base, EATA_CMD_PIO_READ_CONFIG);
625
626 loop = HZ / 2;
627 for (p = (unsigned short *) buf; (long) p <= ((long) buf + (sizeof(struct get_conf) / 2)); p++) {
628 while (!(inb(base + HA_RSTATUS) & HA_SDRQ))
629 if (--loop == 0)
630 goto fail;
631
632 loop = HZ / 2;
633 *p = inw(base + HA_RDATA);
634 }
635 if (inb(base + HA_RSTATUS) & HA_SERROR) {
636 DBG(DBG_PROBE, printk("eata_dma: get_conf_PIO, error during "
637 "transfer for HBA at %x\n", base));
638 goto fail;
639 }
640
641 if (htonl(EATA_SIGNATURE) != buf->signature)
642 goto fail;
643
644 DBG(DBG_PIO && DBG_PROBE, printk(KERN_NOTICE "EATA Controller found "
645 "at %#4x EATA Level: %x\n",
646 base, (uint) (buf->version)));
647
648 while (inb(base + HA_RSTATUS) & HA_SDRQ)
649 inw(base + HA_RDATA);
650
651 if (!ALLOW_DMA_BOARDS) {
652 for (z = 0; z < MAXISA; z++)
653 if (base == ISAbases[z]) {
654 buf->IRQ = ISAirqs[z];
655 break;
656 }
657 }
658
659 return 1;
660
661 fail:
662 release_region(base, 9);
663 return 0;
664 }
665
666 static void print_pio_config(struct get_conf *gc)
667 {
668 printk("Please check values: (read config data)\n");
669 printk("LEN: %d ver:%d OCS:%d TAR:%d TRNXFR:%d MORES:%d\n", (uint) ntohl(gc->len), gc->version, gc->OCS_enabled, gc->TAR_support, gc->TRNXFR, gc->MORE_support);
670 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], ntohs(gc->queuesiz), ntohs(gc->SGsiz), gc->SECOND);
671 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);
672 }
673
674 static uint print_selftest(uint base)
675 {
676 unsigned char buffer[512];
677 #ifdef VERBOSE_SETUP
678 int z;
679 #endif
680
681 printk("eata_pio: executing controller self test & setup...\n");
682 while (inb(base + HA_RSTATUS) & HA_SBUSY);
683 outb(EATA_CMD_PIO_SETUPTEST, base + HA_WCOMMAND);
684 do {
685 while (inb(base + HA_RSTATUS) & HA_SBUSY)
686 /* nothing */ ;
687 if (inb(base + HA_RSTATUS) & HA_SDRQ) {
688 insw(base + HA_RDATA, &buffer, 256);
689 #ifdef VERBOSE_SETUP
690 /* no beeps please... */
691 for (z = 0; z < 511 && buffer[z]; z++)
692 if (buffer[z] != 7)
693 printk("%c", buffer[z]);
694 #endif
695 }
696 } while (inb(base + HA_RSTATUS) & (HA_SBUSY | HA_SDRQ));
697
698 return (!(inb(base + HA_RSTATUS) & HA_SERROR));
699 }
700
701 static int register_pio_HBA(long base, struct get_conf *gc)
702 {
703 unsigned long size = 0;
704 char *buff;
705 unsigned long cplen;
706 unsigned short cppadlen;
707 struct Scsi_Host *sh;
708 hostdata *hd;
709
710 DBG(DBG_REGISTER, print_pio_config(gc));
711
712 if (gc->DMA_support) {
713 printk("HBA at %#.4lx supports DMA. Please use EATA-DMA driver.\n", base);
714 if (!ALLOW_DMA_BOARDS)
715 return 0;
716 }
717
718 if ((buff = get_pio_board_data((uint) base, gc->IRQ, gc->scsi_id[3], cplen = (htonl(gc->cplen) + 1) / 2, cppadlen = (htons(gc->cppadlen) + 1) / 2)) == NULL) {
719 printk("HBA at %#lx didn't react on INQUIRY. Sorry.\n", (unsigned long) base);
720 return 0;
721 }
722
723 if (!print_selftest(base) && !ALLOW_DMA_BOARDS) {
724 printk("HBA at %#lx failed while performing self test & setup.\n", (unsigned long) base);
725 return 0;
726 }
727
728 size = sizeof(hostdata) + (sizeof(struct eata_ccb) * ntohs(gc->queuesiz));
729
730 sh = scsi_register(&driver_template, size);
731 if (sh == NULL)
732 return 0;
733
734 if (!reg_IRQ[gc->IRQ]) { /* Interrupt already registered ? */
735 if (!request_irq(gc->IRQ, do_eata_pio_int_handler, SA_INTERRUPT, "EATA-PIO", sh)) {
736 reg_IRQ[gc->IRQ]++;
737 if (!gc->IRQ_TR)
738 reg_IRQL[gc->IRQ] = 1; /* IRQ is edge triggered */
739 } else {
740 printk("Couldn't allocate IRQ %d, Sorry.\n", gc->IRQ);
741 return 0;
742 }
743 } else { /* More than one HBA on this IRQ */
744 if (reg_IRQL[gc->IRQ]) {
745 printk("Can't support more than one HBA on this IRQ,\n" " if the IRQ is edge triggered. Sorry.\n");
746 return 0;
747 } else
748 reg_IRQ[gc->IRQ]++;
749 }
750
751 hd = SD(sh);
752
753 memset(hd->ccb, 0, (sizeof(struct eata_ccb) * ntohs(gc->queuesiz)));
754 memset(hd->reads, 0, sizeof(unsigned long) * 26);
755
756 strlcpy(SD(sh)->vendor, &buff[8], sizeof(SD(sh)->vendor));
757 strlcpy(SD(sh)->name, &buff[16], sizeof(SD(sh)->name));
758 SD(sh)->revision[0] = buff[32];
759 SD(sh)->revision[1] = buff[33];
760 SD(sh)->revision[2] = buff[34];
761 SD(sh)->revision[3] = '.';
762 SD(sh)->revision[4] = buff[35];
763 SD(sh)->revision[5] = 0;
764
765 switch (ntohl(gc->len)) {
766 case 0x1c:
767 SD(sh)->EATA_revision = 'a';
768 break;
769 case 0x1e:
770 SD(sh)->EATA_revision = 'b';
771 break;
772 case 0x22:
773 SD(sh)->EATA_revision = 'c';
774 break;
775 case 0x24:
776 SD(sh)->EATA_revision = 'z';
777 default:
778 SD(sh)->EATA_revision = '?';
779 }
780
781 if (ntohl(gc->len) >= 0x22) {
782 if (gc->is_PCI)
783 hd->bustype = IS_PCI;
784 else if (gc->is_EISA)
785 hd->bustype = IS_EISA;
786 else
787 hd->bustype = IS_ISA;
788 } else {
789 if (buff[21] == '4')
790 hd->bustype = IS_PCI;
791 else if (buff[21] == '2')
792 hd->bustype = IS_EISA;
793 else
794 hd->bustype = IS_ISA;
795 }
796
797 SD(sh)->cplen = cplen;
798 SD(sh)->cppadlen = cppadlen;
799 SD(sh)->hostid = gc->scsi_id[3];
800 SD(sh)->devflags = 1 << gc->scsi_id[3];
801 SD(sh)->moresupport = gc->MORE_support;
802 sh->unique_id = base;
803 sh->base = base;
804 sh->io_port = base;
805 sh->n_io_port = 9;
806 sh->irq = gc->IRQ;
807 sh->dma_channel = PIO;
808 sh->this_id = gc->scsi_id[3];
809 sh->can_queue = 1;
810 sh->cmd_per_lun = 1;
811 sh->sg_tablesize = SG_ALL;
812
813 hd->channel = 0;
814
815 sh->max_id = 8;
816 sh->max_lun = 8;
817
818 if (gc->SECOND)
819 hd->primary = 0;
820 else
821 hd->primary = 1;
822
823 sh->unchecked_isa_dma = 0; /* We can only do PIO */
824
825 hd->next = NULL; /* build a linked list of all HBAs */
826 hd->prev = last_HBA;
827 if (hd->prev != NULL)
828 SD(hd->prev)->next = sh;
829 last_HBA = sh;
830 if (first_HBA == NULL)
831 first_HBA = sh;
832 registered_HBAs++;
833 return (1);
834 }
835
836 static void find_pio_ISA(struct get_conf *buf)
837 {
838 int i;
839
840 for (i = 0; i < MAXISA; i++) {
841 if (!ISAbases[i])
842 continue;
843 if (!get_pio_conf_PIO(ISAbases[i], buf))
844 continue;
845 if (!register_pio_HBA(ISAbases[i], buf))
846 release_region(ISAbases[i], 9);
847 else
848 ISAbases[i] = 0;
849 }
850 return;
851 }
852
853 static void find_pio_EISA(struct get_conf *buf)
854 {
855 u32 base;
856 int i;
857
858 #ifdef CHECKPAL
859 u8 pal1, pal2, pal3;
860 #endif
861
862 for (i = 0; i < MAXEISA; i++) {
863 if (EISAbases[i]) { /* Still a possibility ? */
864
865 base = 0x1c88 + (i * 0x1000);
866 #ifdef CHECKPAL
867 pal1 = inb((u16) base - 8);
868 pal2 = inb((u16) base - 7);
869 pal3 = inb((u16) base - 6);
870
871 if (((pal1 == 0x12) && (pal2 == 0x14)) || ((pal1 == 0x38) && (pal2 == 0xa3) && (pal3 == 0x82)) || ((pal1 == 0x06) && (pal2 == 0x94) && (pal3 == 0x24))) {
872 DBG(DBG_PROBE, printk(KERN_NOTICE "EISA EATA id tags found: " "%x %x %x \n", (int) pal1, (int) pal2, (int) pal3));
873 #endif
874 if (get_pio_conf_PIO(base, buf)) {
875 DBG(DBG_PROBE && DBG_EISA, print_pio_config(buf));
876 if (buf->IRQ) {
877 if (!register_pio_HBA(base, buf))
878 release_region(base, 9);
879 } else {
880 printk(KERN_NOTICE "eata_dma: No valid IRQ. HBA " "removed from list\n");
881 release_region(base, 9);
882 }
883 }
884 /* Nothing found here so we take it from the list */
885 EISAbases[i] = 0;
886 #ifdef CHECKPAL
887 }
888 #endif
889 }
890 }
891 return;
892 }
893
894 static void find_pio_PCI(struct get_conf *buf)
895 {
896 #ifndef CONFIG_PCI
897 printk("eata_dma: kernel PCI support not enabled. Skipping scan for PCI HBAs.\n");
898 #else
899 struct pci_dev *dev = NULL;
900 u32 base, x;
901
902 while ((dev = pci_find_device(PCI_VENDOR_ID_DPT, PCI_DEVICE_ID_DPT, dev)) != NULL) {
903 DBG(DBG_PROBE && DBG_PCI, printk("eata_pio: find_PCI, HBA at %s\n", pci_name(dev)));
904 if (pci_enable_device(dev))
905 continue;
906 pci_set_master(dev);
907 base = pci_resource_flags(dev, 0);
908 if (base & IORESOURCE_MEM) {
909 printk("eata_pio: invalid base address of device %s\n", pci_name(dev));
910 continue;
911 }
912 base = pci_resource_start(dev, 0);
913 /* EISA tag there ? */
914 if ((inb(base) == 0x12) && (inb(base + 1) == 0x14))
915 continue; /* Jep, it's forced, so move on */
916 base += 0x10; /* Now, THIS is the real address */
917 if (base != 0x1f8) {
918 /* We didn't find it in the primary search */
919 if (get_pio_conf_PIO(base, buf)) {
920 if (buf->FORCADR) { /* If the address is forced */
921 release_region(base, 9);
922 continue; /* we'll find it later */
923 }
924
925 /* OK. We made it till here, so we can go now
926 * and register it. We only have to check and
927 * eventually remove it from the EISA and ISA list
928 */
929
930 if (!register_pio_HBA(base, buf)) {
931 release_region(base, 9);
932 continue;
933 }
934
935 if (base < 0x1000) {
936 for (x = 0; x < MAXISA; ++x) {
937 if (ISAbases[x] == base) {
938 ISAbases[x] = 0;
939 break;
940 }
941 }
942 } else if ((base & 0x0fff) == 0x0c88) {
943 x = (base >> 12) & 0x0f;
944 EISAbases[x] = 0;
945 }
946 }
947 #ifdef CHECK_BLINK
948 else if (check_blink_state(base)) {
949 printk("eata_pio: HBA is in BLINK state.\n" "Consult your HBAs manual to correct this.\n");
950 }
951 #endif
952 }
953 }
954 #endif /* #ifndef CONFIG_PCI */
955 }
956
957 static int eata_pio_detect(struct scsi_host_template *tpnt)
958 {
959 struct Scsi_Host *HBA_ptr;
960 struct get_conf gc;
961 int i;
962
963 find_pio_PCI(&gc);
964 find_pio_EISA(&gc);
965 find_pio_ISA(&gc);
966
967 for (i = 0; i <= MAXIRQ; i++)
968 if (reg_IRQ[i])
969 request_irq(i, do_eata_pio_int_handler, SA_INTERRUPT, "EATA-PIO", NULL);
970
971 HBA_ptr = first_HBA;
972
973 if (registered_HBAs != 0) {
974 printk("EATA (Extended Attachment) PIO driver version: %d.%d%s\n"
975 "(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);
976
977 printk("Registered HBAs:\n");
978 printk("HBA no. Boardtype: Revis: EATA: Bus: BaseIO: IRQ: Ch: ID: Pr:" " QS: SG: CPL:\n");
979 for (i = 1; i <= registered_HBAs; i++) {
980 printk("scsi%-2d: %.10s v%s 2.0%c %s %#.4x %2d %d %d %c"
981 " %2d %2d %2d\n",
982 HBA_ptr->host_no, SD(HBA_ptr)->name, SD(HBA_ptr)->revision,
983 SD(HBA_ptr)->EATA_revision, (SD(HBA_ptr)->bustype == 'P') ?
984 "PCI " : (SD(HBA_ptr)->bustype == 'E') ? "EISA" : "ISA ",
985 (uint) HBA_ptr->base, HBA_ptr->irq, SD(HBA_ptr)->channel, HBA_ptr->this_id,
986 SD(HBA_ptr)->primary ? 'Y' : 'N', HBA_ptr->can_queue,
987 HBA_ptr->sg_tablesize, HBA_ptr->cmd_per_lun);
988 HBA_ptr = SD(HBA_ptr)->next;
989 }
990 }
991 return (registered_HBAs);
992 }
993
994 static struct scsi_host_template driver_template = {
995 .proc_name = "eata_pio",
996 .name = "EATA (Extended Attachment) PIO driver",
997 .proc_info = eata_pio_proc_info,
998 .detect = eata_pio_detect,
999 .release = eata_pio_release,
1000 .queuecommand = eata_pio_queue,
1001 .eh_abort_handler = eata_pio_abort,
1002 .eh_host_reset_handler = eata_pio_host_reset,
1003 .use_clustering = ENABLE_CLUSTERING,
1004 };
1005
1006 MODULE_AUTHOR("Michael Neuffer, Alfred Arnold");
1007 MODULE_DESCRIPTION("EATA SCSI PIO driver");
1008 MODULE_LICENSE("GPL");
1009
1010 #include "scsi_module.c"
x86 "subsystem" repository