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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 18:20:36 -0400
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 18:20:36 -0400
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /drivers/scsi/eata_pio.c
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
Diffstat (limited to 'drivers/scsi/eata_pio.c')
-rw-r--r--drivers/scsi/eata_pio.c996
1 files changed, 996 insertions, 0 deletions
diff --git a/drivers/scsi/eata_pio.c b/drivers/scsi/eata_pio.c
new file mode 100644
index 000000000000..0ee49dc50b85
--- /dev/null
+++ b/drivers/scsi/eata_pio.c
@@ -0,0 +1,996 @@
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
75static uint ISAbases[MAXISA] = {
76 0x1F0, 0x170, 0x330, 0x230
77};
78
79static uint ISAirqs[MAXISA] = {
80 14, 12, 15, 11
81};
82
83static unsigned char EISAbases[] = {
84 1, 1, 1, 1, 1, 1, 1, 1,
85 1, 1, 1, 1, 1, 1, 1, 1
86};
87
88static uint registered_HBAs;
89static struct Scsi_Host *last_HBA;
90static struct Scsi_Host *first_HBA;
91static unsigned char reg_IRQ[16];
92static unsigned char reg_IRQL[16];
93static unsigned long int_counter;
94static unsigned long queue_counter;
95
96static 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 */
109static 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
167static 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
180static 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
194static void eata_pio_int_handler(int irq, void *dev_id, struct pt_regs *regs);
195
196static 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
208static 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
332static 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
350static 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, printk(KERN_DEBUG "eata_pio_queue pid %ld, target: %x, lun:" " %x, y %d\n", cmd->pid, cmd->device->id, cmd->device->lun, y));
388
389 cmd->scsi_done = (void *) done;
390
391 if (cmd->sc_data_direction == DMA_TO_DEVICE)
392 cp->DataOut = 1; /* Output mode */
393 else
394 cp->DataIn = 0; /* Input mode */
395
396 cp->Interpret = (cmd->device->id == hd->hostid);
397 cp->cp_datalen = htonl((unsigned long) cmd->request_bufflen);
398 cp->Auto_Req_Sen = 0;
399 cp->cp_reqDMA = htonl(0);
400 cp->reqlen = 0;
401
402 cp->cp_id = cmd->device->id;
403 cp->cp_lun = cmd->device->lun;
404 cp->cp_dispri = 0;
405 cp->cp_identify = 1;
406 memcpy(cp->cp_cdb, cmd->cmnd, COMMAND_SIZE(*cmd->cmnd));
407
408 cp->cp_statDMA = htonl(0);
409
410 cp->cp_viraddr = cp;
411 cp->cmd = cmd;
412 cmd->host_scribble = (char *) &hd->ccb[y];
413
414 if (cmd->use_sg == 0) {
415 cmd->SCp.buffers_residual = 1;
416 cmd->SCp.ptr = cmd->request_buffer;
417 cmd->SCp.this_residual = cmd->request_bufflen;
418 cmd->SCp.buffer = NULL;
419 } else {
420 cmd->SCp.buffer = cmd->request_buffer;
421 cmd->SCp.buffers_residual = cmd->use_sg;
422 cmd->SCp.ptr = page_address(cmd->SCp.buffer->page) + cmd->SCp.buffer->offset;
423 cmd->SCp.this_residual = cmd->SCp.buffer->length;
424 }
425 cmd->SCp.Status = (cmd->SCp.this_residual != 0); /* TRUE as long as bytes
426 * are to transfer */
427
428 if (eata_pio_send_command(base, EATA_CMD_PIO_SEND_CP)) {
429 cmd->result = DID_BUS_BUSY << 16;
430 printk(KERN_NOTICE "eata_pio_queue target %d, pid %ld, HBA busy, " "returning DID_BUS_BUSY, done.\n", cmd->device->id, cmd->pid);
431 done(cmd);
432 cp->status = FREE;
433 return (0);
434 }
435 /* FIXME: timeout */
436 while (!(inb(base + HA_RSTATUS) & HA_SDRQ))
437 cpu_relax();
438 outsw(base + HA_RDATA, cp, hd->cplen);
439 outb(EATA_CMD_PIO_TRUNC, base + HA_WCOMMAND);
440 for (x = 0; x < hd->cppadlen; x++)
441 outw(0, base + HA_RDATA);
442
443 DBG(DBG_QUEUE, printk(KERN_DEBUG "Queued base %#.4lx pid: %ld target: %x " "lun: %x slot %d irq %d\n", (long) sh->base, cmd->pid, cmd->device->id, cmd->device->lun, y, sh->irq));
444
445 return (0);
446}
447
448static int eata_pio_abort(struct scsi_cmnd *cmd)
449{
450 uint loop = HZ;
451
452 DBG(DBG_ABNORM, printk(KERN_WARNING "eata_pio_abort called pid: %ld " "target: %x lun: %x reason %x\n", cmd->pid, cmd->device->id, cmd->device->lun, cmd->abort_reason));
453
454
455 while (inb(cmd->device->host->base + HA_RAUXSTAT) & HA_ABUSY)
456 if (--loop == 0) {
457 printk(KERN_WARNING "eata_pio: abort, timeout error.\n");
458 return FAILED;
459 }
460 if (CD(cmd)->status == FREE) {
461 DBG(DBG_ABNORM, printk(KERN_WARNING "Returning: SCSI_ABORT_NOT_RUNNING\n"));
462 return FAILED;
463 }
464 if (CD(cmd)->status == USED) {
465 DBG(DBG_ABNORM, printk(KERN_WARNING "Returning: SCSI_ABORT_BUSY\n"));
466 /* We want to sleep a bit more here */
467 return FAILED; /* SNOOZE */
468 }
469 if (CD(cmd)->status == RESET) {
470 printk(KERN_WARNING "eata_pio: abort, command reset error.\n");
471 return FAILED;
472 }
473 if (CD(cmd)->status == LOCKED) {
474 DBG(DBG_ABNORM, printk(KERN_WARNING "eata_pio: abort, queue slot " "locked.\n"));
475 return FAILED;
476 }
477 panic("eata_pio: abort: invalid slot status\n");
478}
479
480static int eata_pio_host_reset(struct scsi_cmnd *cmd)
481{
482 uint x, limit = 0;
483 unsigned char success = 0;
484 struct scsi_cmnd *sp;
485 struct Scsi_Host *host = cmd->device->host;
486
487 DBG(DBG_ABNORM, printk(KERN_WARNING "eata_pio_reset called pid:%ld target:" " %x lun: %x reason %x\n", cmd->pid, cmd->device->id, cmd->device->lun, cmd->abort_reason));
488
489 if (HD(cmd)->state == RESET) {
490 printk(KERN_WARNING "eata_pio_reset: exit, already in reset.\n");
491 return FAILED;
492 }
493
494 /* force all slots to be free */
495
496 for (x = 0; x < cmd->device->host->can_queue; x++) {
497
498 if (HD(cmd)->ccb[x].status == FREE)
499 continue;
500
501 sp = HD(cmd)->ccb[x].cmd;
502 HD(cmd)->ccb[x].status = RESET;
503 printk(KERN_WARNING "eata_pio_reset: slot %d in reset, pid %ld.\n", x, sp->pid);
504
505 if (sp == NULL)
506 panic("eata_pio_reset: slot %d, sp==NULL.\n", x);
507 }
508
509 /* hard reset the HBA */
510 outb(EATA_CMD_RESET, (uint) cmd->device->host->base + HA_WCOMMAND);
511
512 DBG(DBG_ABNORM, printk(KERN_WARNING "eata_pio_reset: board reset done.\n"));
513 HD(cmd)->state = RESET;
514
515 spin_unlock_irq(host->host_lock);
516 msleep(3000);
517 spin_lock_irq(host->host_lock);
518
519 DBG(DBG_ABNORM, printk(KERN_WARNING "eata_pio_reset: interrupts disabled, " "loops %d.\n", limit));
520
521 for (x = 0; x < cmd->device->host->can_queue; x++) {
522
523 /* Skip slots already set free by interrupt */
524 if (HD(cmd)->ccb[x].status != RESET)
525 continue;
526
527 sp = HD(cmd)->ccb[x].cmd;
528 sp->result = DID_RESET << 16;
529
530 /* This mailbox is terminated */
531 printk(KERN_WARNING "eata_pio_reset: reset ccb %d.\n", x);
532 HD(cmd)->ccb[x].status = FREE;
533
534 sp->scsi_done(sp);
535 }
536
537 HD(cmd)->state = 0;
538
539 if (success) { /* hmmm... */
540 DBG(DBG_ABNORM, printk(KERN_WARNING "eata_pio_reset: exit, success.\n"));
541 return SUCCESS;
542 } else {
543 DBG(DBG_ABNORM, printk(KERN_WARNING "eata_pio_reset: exit, wakeup.\n"));
544 return FAILED;
545 }
546}
547
548static char *get_pio_board_data(unsigned long base, uint irq, uint id, unsigned long cplen, unsigned short cppadlen)
549{
550 struct eata_ccb cp;
551 static char buff[256];
552 int z;
553
554 memset(&cp, 0, sizeof(struct eata_ccb));
555 memset(buff, 0, sizeof(buff));
556
557 cp.DataIn = 1;
558 cp.Interpret = 1; /* Interpret command */
559
560 cp.cp_datalen = htonl(254);
561 cp.cp_dataDMA = htonl(0);
562
563 cp.cp_id = id;
564 cp.cp_lun = 0;
565
566 cp.cp_cdb[0] = INQUIRY;
567 cp.cp_cdb[1] = 0;
568 cp.cp_cdb[2] = 0;
569 cp.cp_cdb[3] = 0;
570 cp.cp_cdb[4] = 254;
571 cp.cp_cdb[5] = 0;
572
573 if (eata_pio_send_command((uint) base, EATA_CMD_PIO_SEND_CP))
574 return (NULL);
575 while (!(inb(base + HA_RSTATUS) & HA_SDRQ));
576 outsw(base + HA_RDATA, &cp, cplen);
577 outb(EATA_CMD_PIO_TRUNC, base + HA_WCOMMAND);
578 for (z = 0; z < cppadlen; z++)
579 outw(0, base + HA_RDATA);
580
581 while (inb(base + HA_RSTATUS) & HA_SBUSY);
582 if (inb(base + HA_RSTATUS) & HA_SERROR)
583 return (NULL);
584 else if (!(inb(base + HA_RSTATUS) & HA_SDRQ))
585 return (NULL);
586 else {
587 insw(base + HA_RDATA, &buff, 127);
588 while (inb(base + HA_RSTATUS) & HA_SDRQ)
589 inw(base + HA_RDATA);
590 return (buff);
591 }
592}
593
594static int get_pio_conf_PIO(u32 base, struct get_conf *buf)
595{
596 unsigned long loop = HZ / 2;
597 int z;
598 unsigned short *p;
599
600 if (!request_region(base, 9, "eata_pio"))
601 return 0;
602
603 memset(buf, 0, sizeof(struct get_conf));
604
605 while (inb(base + HA_RSTATUS) & HA_SBUSY)
606 if (--loop == 0)
607 goto fail;
608
609 DBG(DBG_PIO && DBG_PROBE, printk(KERN_DEBUG "Issuing PIO READ CONFIG to HBA at %#x\n", base));
610 eata_pio_send_command(base, EATA_CMD_PIO_READ_CONFIG);
611
612 loop = HZ / 2;
613 for (p = (unsigned short *) buf; (long) p <= ((long) buf + (sizeof(struct get_conf) / 2)); p++) {
614 while (!(inb(base + HA_RSTATUS) & HA_SDRQ))
615 if (--loop == 0)
616 goto fail;
617
618 loop = HZ / 2;
619 *p = inw(base + HA_RDATA);
620 }
621 if (inb(base + HA_RSTATUS) & HA_SERROR) {
622 DBG(DBG_PROBE, printk("eata_dma: get_conf_PIO, error during "
623 "transfer for HBA at %x\n", base));
624 goto fail;
625 }
626
627 if (htonl(EATA_SIGNATURE) != buf->signature)
628 goto fail;
629
630 DBG(DBG_PIO && DBG_PROBE, printk(KERN_NOTICE "EATA Controller found "
631 "at %#4x EATA Level: %x\n",
632 base, (uint) (buf->version)));
633
634 while (inb(base + HA_RSTATUS) & HA_SDRQ)
635 inw(base + HA_RDATA);
636
637 if (!ALLOW_DMA_BOARDS) {
638 for (z = 0; z < MAXISA; z++)
639 if (base == ISAbases[z]) {
640 buf->IRQ = ISAirqs[z];
641 break;
642 }
643 }
644
645 return 1;
646
647 fail:
648 release_region(base, 9);
649 return 0;
650}
651
652static void print_pio_config(struct get_conf *gc)
653{
654 printk("Please check values: (read config data)\n");
655 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);
656 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);
657 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);
658}
659
660static uint print_selftest(uint base)
661{
662 unsigned char buffer[512];
663#ifdef VERBOSE_SETUP
664 int z;
665#endif
666
667 printk("eata_pio: executing controller self test & setup...\n");
668 while (inb(base + HA_RSTATUS) & HA_SBUSY);
669 outb(EATA_CMD_PIO_SETUPTEST, base + HA_WCOMMAND);
670 do {
671 while (inb(base + HA_RSTATUS) & HA_SBUSY)
672 /* nothing */ ;
673 if (inb(base + HA_RSTATUS) & HA_SDRQ) {
674 insw(base + HA_RDATA, &buffer, 256);
675#ifdef VERBOSE_SETUP
676 /* no beeps please... */
677 for (z = 0; z < 511 && buffer[z]; z++)
678 if (buffer[z] != 7)
679 printk("%c", buffer[z]);
680#endif
681 }
682 } while (inb(base + HA_RSTATUS) & (HA_SBUSY | HA_SDRQ));
683
684 return (!(inb(base + HA_RSTATUS) & HA_SERROR));
685}
686
687static int register_pio_HBA(long base, struct get_conf *gc)
688{
689 unsigned long size = 0;
690 char *buff;
691 unsigned long cplen;
692 unsigned short cppadlen;
693 struct Scsi_Host *sh;
694 hostdata *hd;
695
696 DBG(DBG_REGISTER, print_pio_config(gc));
697
698 if (gc->DMA_support) {
699 printk("HBA at %#.4lx supports DMA. Please use EATA-DMA driver.\n", base);
700 if (!ALLOW_DMA_BOARDS)
701 return 0;
702 }
703
704 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) {
705 printk("HBA at %#lx didn't react on INQUIRY. Sorry.\n", (unsigned long) base);
706 return 0;
707 }
708
709 if (!print_selftest(base) && !ALLOW_DMA_BOARDS) {
710 printk("HBA at %#lx failed while performing self test & setup.\n", (unsigned long) base);
711 return 0;
712 }
713
714 size = sizeof(hostdata) + (sizeof(struct eata_ccb) * ntohs(gc->queuesiz));
715
716 sh = scsi_register(&driver_template, size);
717 if (sh == NULL)
718 return 0;
719
720 if (!reg_IRQ[gc->IRQ]) { /* Interrupt already registered ? */
721 if (!request_irq(gc->IRQ, do_eata_pio_int_handler, SA_INTERRUPT, "EATA-PIO", sh)) {
722 reg_IRQ[gc->IRQ]++;
723 if (!gc->IRQ_TR)
724 reg_IRQL[gc->IRQ] = 1; /* IRQ is edge triggered */
725 } else {
726 printk("Couldn't allocate IRQ %d, Sorry.\n", gc->IRQ);
727 return 0;
728 }
729 } else { /* More than one HBA on this IRQ */
730 if (reg_IRQL[gc->IRQ]) {
731 printk("Can't support more than one HBA on this IRQ,\n" " if the IRQ is edge triggered. Sorry.\n");
732 return 0;
733 } else
734 reg_IRQ[gc->IRQ]++;
735 }
736
737 hd = SD(sh);
738
739 memset(hd->ccb, 0, (sizeof(struct eata_ccb) * ntohs(gc->queuesiz)));
740 memset(hd->reads, 0, sizeof(unsigned long) * 26);
741
742 strlcpy(SD(sh)->vendor, &buff[8], sizeof(SD(sh)->vendor));
743 strlcpy(SD(sh)->name, &buff[16], sizeof(SD(sh)->name));
744 SD(sh)->revision[0] = buff[32];
745 SD(sh)->revision[1] = buff[33];
746 SD(sh)->revision[2] = buff[34];
747 SD(sh)->revision[3] = '.';
748 SD(sh)->revision[4] = buff[35];
749 SD(sh)->revision[5] = 0;
750
751 switch (ntohl(gc->len)) {
752 case 0x1c:
753 SD(sh)->EATA_revision = 'a';
754 break;
755 case 0x1e:
756 SD(sh)->EATA_revision = 'b';
757 break;
758 case 0x22:
759 SD(sh)->EATA_revision = 'c';
760 break;
761 case 0x24:
762 SD(sh)->EATA_revision = 'z';
763 default:
764 SD(sh)->EATA_revision = '?';
765 }
766
767 if (ntohl(gc->len) >= 0x22) {
768 if (gc->is_PCI)
769 hd->bustype = IS_PCI;
770 else if (gc->is_EISA)
771 hd->bustype = IS_EISA;
772 else
773 hd->bustype = IS_ISA;
774 } else {
775 if (buff[21] == '4')
776 hd->bustype = IS_PCI;
777 else if (buff[21] == '2')
778 hd->bustype = IS_EISA;
779 else
780 hd->bustype = IS_ISA;
781 }
782
783 SD(sh)->cplen = cplen;
784 SD(sh)->cppadlen = cppadlen;
785 SD(sh)->hostid = gc->scsi_id[3];
786 SD(sh)->devflags = 1 << gc->scsi_id[3];
787 SD(sh)->moresupport = gc->MORE_support;
788 sh->unique_id = base;
789 sh->base = base;
790 sh->io_port = base;
791 sh->n_io_port = 9;
792 sh->irq = gc->IRQ;
793 sh->dma_channel = PIO;
794 sh->this_id = gc->scsi_id[3];
795 sh->can_queue = 1;
796 sh->cmd_per_lun = 1;
797 sh->sg_tablesize = SG_ALL;
798
799 hd->channel = 0;
800
801 sh->max_id = 8;
802 sh->max_lun = 8;
803
804 if (gc->SECOND)
805 hd->primary = 0;
806 else
807 hd->primary = 1;
808
809 sh->unchecked_isa_dma = 0; /* We can only do PIO */
810
811 hd->next = NULL; /* build a linked list of all HBAs */
812 hd->prev = last_HBA;
813 if (hd->prev != NULL)
814 SD(hd->prev)->next = sh;
815 last_HBA = sh;
816 if (first_HBA == NULL)
817 first_HBA = sh;
818 registered_HBAs++;
819 return (1);
820}
821
822static void find_pio_ISA(struct get_conf *buf)
823{
824 int i;
825
826 for (i = 0; i < MAXISA; i++) {
827 if (!ISAbases[i])
828 continue;
829 if (!get_pio_conf_PIO(ISAbases[i], buf))
830 continue;
831 if (!register_pio_HBA(ISAbases[i], buf))
832 release_region(ISAbases[i], 9);
833 else
834 ISAbases[i] = 0;
835 }
836 return;
837}
838
839static void find_pio_EISA(struct get_conf *buf)
840{
841 u32 base;
842 int i;
843
844#ifdef CHECKPAL
845 u8 pal1, pal2, pal3;
846#endif
847
848 for (i = 0; i < MAXEISA; i++) {
849 if (EISAbases[i]) { /* Still a possibility ? */
850
851 base = 0x1c88 + (i * 0x1000);
852#ifdef CHECKPAL
853 pal1 = inb((u16) base - 8);
854 pal2 = inb((u16) base - 7);
855 pal3 = inb((u16) base - 6);
856
857 if (((pal1 == 0x12) && (pal2 == 0x14)) || ((pal1 == 0x38) && (pal2 == 0xa3) && (pal3 == 0x82)) || ((pal1 == 0x06) && (pal2 == 0x94) && (pal3 == 0x24))) {
858 DBG(DBG_PROBE, printk(KERN_NOTICE "EISA EATA id tags found: " "%x %x %x \n", (int) pal1, (int) pal2, (int) pal3));
859#endif
860 if (get_pio_conf_PIO(base, buf)) {
861 DBG(DBG_PROBE && DBG_EISA, print_pio_config(buf));
862 if (buf->IRQ) {
863 if (!register_pio_HBA(base, buf))
864 release_region(base, 9);
865 } else {
866 printk(KERN_NOTICE "eata_dma: No valid IRQ. HBA " "removed from list\n");
867 release_region(base, 9);
868 }
869 }
870 /* Nothing found here so we take it from the list */
871 EISAbases[i] = 0;
872#ifdef CHECKPAL
873 }
874#endif
875 }
876 }
877 return;
878}
879
880static void find_pio_PCI(struct get_conf *buf)
881{
882#ifndef CONFIG_PCI
883 printk("eata_dma: kernel PCI support not enabled. Skipping scan for PCI HBAs.\n");
884#else
885 struct pci_dev *dev = NULL;
886 u32 base, x;
887
888 while ((dev = pci_find_device(PCI_VENDOR_ID_DPT, PCI_DEVICE_ID_DPT, dev)) != NULL) {
889 DBG(DBG_PROBE && DBG_PCI, printk("eata_pio: find_PCI, HBA at %s\n", pci_name(dev)));
890 if (pci_enable_device(dev))
891 continue;
892 pci_set_master(dev);
893 base = pci_resource_flags(dev, 0);
894 if (base & IORESOURCE_MEM) {
895 printk("eata_pio: invalid base address of device %s\n", pci_name(dev));
896 continue;
897 }
898 base = pci_resource_start(dev, 0);
899 /* EISA tag there ? */
900 if ((inb(base) == 0x12) && (inb(base + 1) == 0x14))
901 continue; /* Jep, it's forced, so move on */
902 base += 0x10; /* Now, THIS is the real address */
903 if (base != 0x1f8) {
904 /* We didn't find it in the primary search */
905 if (get_pio_conf_PIO(base, buf)) {
906 if (buf->FORCADR) { /* If the address is forced */
907 release_region(base, 9);
908 continue; /* we'll find it later */
909 }
910
911 /* OK. We made it till here, so we can go now
912 * and register it. We only have to check and
913 * eventually remove it from the EISA and ISA list
914 */
915
916 if (!register_pio_HBA(base, buf)) {
917 release_region(base, 9);
918 continue;
919 }
920
921 if (base < 0x1000) {
922 for (x = 0; x < MAXISA; ++x) {
923 if (ISAbases[x] == base) {
924 ISAbases[x] = 0;
925 break;
926 }
927 }
928 } else if ((base & 0x0fff) == 0x0c88) {
929 x = (base >> 12) & 0x0f;
930 EISAbases[x] = 0;
931 }
932 }
933#ifdef CHECK_BLINK
934 else if (check_blink_state(base)) {
935 printk("eata_pio: HBA is in BLINK state.\n" "Consult your HBAs manual to correct this.\n");
936 }
937#endif
938 }
939 }
940#endif /* #ifndef CONFIG_PCI */
941}
942
943static int eata_pio_detect(struct scsi_host_template *tpnt)
944{
945 struct Scsi_Host *HBA_ptr;
946 struct get_conf gc;
947 int i;
948
949 find_pio_PCI(&gc);
950 find_pio_EISA(&gc);
951 find_pio_ISA(&gc);
952
953 for (i = 0; i <= MAXIRQ; i++)
954 if (reg_IRQ[i])
955 request_irq(i, do_eata_pio_int_handler, SA_INTERRUPT, "EATA-PIO", NULL);
956
957 HBA_ptr = first_HBA;
958
959 if (registered_HBAs != 0) {
960 printk("EATA (Extended Attachment) PIO driver version: %d.%d%s\n"
961 "(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);
962
963 printk("Registered HBAs:\n");
964 printk("HBA no. Boardtype: Revis: EATA: Bus: BaseIO: IRQ: Ch: ID: Pr:" " QS: SG: CPL:\n");
965 for (i = 1; i <= registered_HBAs; i++) {
966 printk("scsi%-2d: %.10s v%s 2.0%c %s %#.4x %2d %d %d %c"
967 " %2d %2d %2d\n",
968 HBA_ptr->host_no, SD(HBA_ptr)->name, SD(HBA_ptr)->revision,
969 SD(HBA_ptr)->EATA_revision, (SD(HBA_ptr)->bustype == 'P') ?
970 "PCI " : (SD(HBA_ptr)->bustype == 'E') ? "EISA" : "ISA ",
971 (uint) HBA_ptr->base, HBA_ptr->irq, SD(HBA_ptr)->channel, HBA_ptr->this_id,
972 SD(HBA_ptr)->primary ? 'Y' : 'N', HBA_ptr->can_queue,
973 HBA_ptr->sg_tablesize, HBA_ptr->cmd_per_lun);
974 HBA_ptr = SD(HBA_ptr)->next;
975 }
976 }
977 return (registered_HBAs);
978}
979
980static struct scsi_host_template driver_template = {
981 .proc_name = "eata_pio",
982 .name = "EATA (Extended Attachment) PIO driver",
983 .proc_info = eata_pio_proc_info,
984 .detect = eata_pio_detect,
985 .release = eata_pio_release,
986 .queuecommand = eata_pio_queue,
987 .eh_abort_handler = eata_pio_abort,
988 .eh_host_reset_handler = eata_pio_host_reset,
989 .use_clustering = ENABLE_CLUSTERING,
990};
991
992MODULE_AUTHOR("Michael Neuffer, Alfred Arnold");
993MODULE_DESCRIPTION("EATA SCSI PIO driver");
994MODULE_LICENSE("GPL");
995
996#include "scsi_module.c"
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-14 22:33:01 -0500