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allow coexistance of N build and AC build.
[tomato.git] / release / src-rt-6.x / linux / linux-2.6 / drivers / scsi / eata_pio.c
blobf33ad01064a9d8b0f8696331bd6d90da1fbbef3a
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 static u8 buff[512];
111 int size, len = 0;
112 off_t begin = 0, pos = 0;
113
114 if (rw)
115 return -ENOSYS;
116 if (offset == 0)
117 memset(buff, 0, sizeof(buff));
118
119 size = sprintf(buffer+len, "EATA (Extended Attachment) PIO driver version: "
120 "%d.%d%s\n",VER_MAJOR, VER_MINOR, VER_SUB);
121 len += size; pos = begin + len;
122 size = sprintf(buffer + len, "queued commands: %10ld\n"
123 "processed interrupts:%10ld\n", queue_counter, int_counter);
124 len += size; pos = begin + len;
125
126 size = sprintf(buffer + len, "\nscsi%-2d: HBA %.10s\n",
127 shost->host_no, SD(shost)->name);
128 len += size;
129 pos = begin + len;
130 size = sprintf(buffer + len, "Firmware revision: v%s\n",
131 SD(shost)->revision);
132 len += size;
133 pos = begin + len;
134 size = sprintf(buffer + len, "IO: PIO\n");
135 len += size;
136 pos = begin + len;
137 size = sprintf(buffer + len, "Base IO : %#.4x\n", (u32) shost->base);
138 len += size;
139 pos = begin + len;
140 size = sprintf(buffer + len, "Host Bus: %s\n",
141 (SD(shost)->bustype == 'P')?"PCI ":
142 (SD(shost)->bustype == 'E')?"EISA":"ISA ");
143
144 len += size;
145 pos = begin + len;
146
147 if (pos < offset) {
148 len = 0;
149 begin = pos;
150 }
151 if (pos > offset + length)
152 goto stop_output;
153
154 stop_output:
155 DBG(DBG_PROC, printk("2pos: %ld offset: %ld len: %d\n", pos, offset, len));
156 *start=buffer+(offset-begin); /* Start of wanted data */
157 len-=(offset-begin); /* Start slop */
158 if(len>length)
159 len = length; /* Ending slop */
160 DBG(DBG_PROC, printk("3pos: %ld offset: %ld len: %d\n", pos, offset, len));
161
162 return (len);
163 }
164
165 static int eata_pio_release(struct Scsi_Host *sh)
166 {
167 hostdata *hd = SD(sh);
168 if (sh->irq && reg_IRQ[sh->irq] == 1)
169 free_irq(sh->irq, NULL);
170 else
171 reg_IRQ[sh->irq]--;
172 if (SD(sh)->channel == 0) {
173 if (sh->io_port && sh->n_io_port)
174 release_region(sh->io_port, sh->n_io_port);
175 }
176 /* At this point the PCI reference can go */
177 if (hd->pdev)
178 pci_dev_put(hd->pdev);
179 return 1;
180 }
181
182 static void IncStat(struct scsi_pointer *SCp, unsigned int Increment)
183 {
184 SCp->ptr += Increment;
185 if ((SCp->this_residual -= Increment) == 0) {
186 if ((--SCp->buffers_residual) == 0)
187 SCp->Status = 0;
188 else {
189 SCp->buffer++;
190 SCp->ptr = page_address(SCp->buffer->page) + SCp->buffer->offset;
191 SCp->this_residual = SCp->buffer->length;
192 }
193 }
194 }
195
196 static irqreturn_t eata_pio_int_handler(int irq, void *dev_id);
197
198 static irqreturn_t do_eata_pio_int_handler(int irq, void *dev_id)
199 {
200 unsigned long flags;
201 struct Scsi_Host *dev = dev_id;
202 irqreturn_t ret;
203
204 spin_lock_irqsave(dev->host_lock, flags);
205 ret = eata_pio_int_handler(irq, dev_id);
206 spin_unlock_irqrestore(dev->host_lock, flags);
207 return ret;
208 }
209
210 static irqreturn_t eata_pio_int_handler(int irq, void *dev_id)
211 {
212 unsigned int eata_stat = 0xfffff;
213 struct scsi_cmnd *cmd;
214 hostdata *hd;
215 struct eata_ccb *cp;
216 unsigned long base;
217 unsigned int x, z;
218 struct Scsi_Host *sh;
219 unsigned short zwickel = 0;
220 unsigned char stat, odd;
221 irqreturn_t ret = IRQ_NONE;
222
223 for (x = 1, sh = first_HBA; x <= registered_HBAs; x++, sh = SD(sh)->prev)
224 {
225 if (sh->irq != irq)
226 continue;
227 if (inb(sh->base + HA_RSTATUS) & HA_SBUSY)
228 continue;
229
230 int_counter++;
231 ret = IRQ_HANDLED;
232
233 hd = SD(sh);
234
235 cp = &hd->ccb[0];
236 cmd = cp->cmd;
237 base = cmd->device->host->base;
238
239 do {
240 stat = inb(base + HA_RSTATUS);
241 if (stat & HA_SDRQ) {
242 if (cp->DataIn) {
243 z = 256;
244 odd = 0;
245 while ((cmd->SCp.Status) && ((z > 0) || (odd))) {
246 if (odd) {
247 *(cmd->SCp.ptr) = zwickel >> 8;
248 IncStat(&cmd->SCp, 1);
249 odd = 0;
250 }
251 x = min_t(unsigned int, z, cmd->SCp.this_residual / 2);
252 insw(base + HA_RDATA, cmd->SCp.ptr, x);
253 z -= x;
254 IncStat(&cmd->SCp, 2 * x);
255 if ((z > 0) && (cmd->SCp.this_residual == 1)) {
256 zwickel = inw(base + HA_RDATA);
257 *(cmd->SCp.ptr) = zwickel & 0xff;
258 IncStat(&cmd->SCp, 1);
259 z--;
260 odd = 1;
261 }
262 }
263 while (z > 0) {
264 zwickel = inw(base + HA_RDATA);
265 z--;
266 }
267 } else { /* cp->DataOut */
268
269 odd = 0;
270 z = 256;
271 while ((cmd->SCp.Status) && ((z > 0) || (odd))) {
272 if (odd) {
273 zwickel += *(cmd->SCp.ptr) << 8;
274 IncStat(&cmd->SCp, 1);
275 outw(zwickel, base + HA_RDATA);
276 z--;
277 odd = 0;
278 }
279 x = min_t(unsigned int, z, cmd->SCp.this_residual / 2);
280 outsw(base + HA_RDATA, cmd->SCp.ptr, x);
281 z -= x;
282 IncStat(&cmd->SCp, 2 * x);
283 if ((z > 0) && (cmd->SCp.this_residual == 1)) {
284 zwickel = *(cmd->SCp.ptr);
285 zwickel &= 0xff;
286 IncStat(&cmd->SCp, 1);
287 odd = 1;
288 }
289 }
290 while (z > 0 || odd) {
291 outw(zwickel, base + HA_RDATA);
292 z--;
293 odd = 0;
294 }
295 }
296 }
297 }
298 while ((stat & HA_SDRQ) || ((stat & HA_SMORE) && hd->moresupport));
299
300 /* terminate handler if HBA goes busy again, i.e. transfers
301 * more data */
302
303 if (stat & HA_SBUSY)
304 break;
305
306 /* OK, this is quite stupid, but I haven't found any correct
307 * way to get HBA&SCSI status so far */
308
309 if (!(inb(base + HA_RSTATUS) & HA_SERROR)) {
310 cmd->result = (DID_OK << 16);
311 hd->devflags |= (1 << cp->cp_id);
312 } else if (hd->devflags & (1 << cp->cp_id))
313 cmd->result = (DID_OK << 16) + 0x02;
314 else
315 cmd->result = (DID_NO_CONNECT << 16);
316
317 if (cp->status == LOCKED) {
318 cp->status = FREE;
319 eata_stat = inb(base + HA_RSTATUS);
320 printk(KERN_CRIT "eata_pio: int_handler, freeing locked " "queueslot\n");
321 return ret;
322 }
323 #if DBG_INTR2
324 if (stat != 0x50)
325 printk(KERN_DEBUG "stat: %#.2x, result: %#.8x\n", stat, cmd->result);
326 #endif
327
328 cp->status = FREE; /* now we can release the slot */
329
330 cmd->scsi_done(cmd);
331 }
332
333 return ret;
334 }
335
336 static inline unsigned int eata_pio_send_command(unsigned long base, unsigned char command)
337 {
338 unsigned int loop = 50;
339
340 while (inb(base + HA_RSTATUS) & HA_SBUSY)
341 if (--loop == 0)
342 return 1;
343
344 /* Enable interrupts for HBA. It is not the best way to do it at this
345 * place, but I hope that it doesn't interfere with the IDE driver
346 * initialization this way */
347
348 outb(HA_CTRL_8HEADS, base + HA_CTRLREG);
349
350 outb(command, base + HA_WCOMMAND);
351 return 0;
352 }
353
354 static int eata_pio_queue(struct scsi_cmnd *cmd,
355 void (*done)(struct scsi_cmnd *))
356 {
357 unsigned int x, y;
358 unsigned long base;
359
360 hostdata *hd;
361 struct Scsi_Host *sh;
362 struct eata_ccb *cp;
363
364 queue_counter++;
365
366 hd = HD(cmd);
367 sh = cmd->device->host;
368 base = sh->base;
369
370 /* use only slot 0, as 2001 can handle only one cmd at a time */
371
372 y = x = 0;
373
374 if (hd->ccb[y].status != FREE) {
375
376 DBG(DBG_QUEUE, printk(KERN_EMERG "can_queue %d, x %d, y %d\n", sh->can_queue, x, y));
377 #if DEBUG_EATA
378 panic(KERN_EMERG "eata_pio: run out of queue slots cmdno:%ld " "intrno: %ld\n", queue_counter, int_counter);
379 #else
380 panic(KERN_EMERG "eata_pio: run out of queue slots....\n");
381 #endif
382 }
383
384 cp = &hd->ccb[y];
385
386 memset(cp, 0, sizeof(struct eata_ccb));
387 memset(cmd->sense_buffer, 0, sizeof(cmd->sense_buffer));
388
389 cp->status = USED; /* claim free slot */
390
391 DBG(DBG_QUEUE, scmd_printk(KERN_DEBUG, cmd,
392 "eata_pio_queue pid %ld, y %d\n",
393 cmd->pid, y));
394
395 cmd->scsi_done = (void *) done;
396
397 if (cmd->sc_data_direction == DMA_TO_DEVICE)
398 cp->DataOut = 1; /* Output mode */
399 else
400 cp->DataIn = 0; /* Input mode */
401
402 cp->Interpret = (cmd->device->id == hd->hostid);
403 cp->cp_datalen = cpu_to_be32(cmd->request_bufflen);
404 cp->Auto_Req_Sen = 0;
405 cp->cp_reqDMA = 0;
406 cp->reqlen = 0;
407
408 cp->cp_id = cmd->device->id;
409 cp->cp_lun = cmd->device->lun;
410 cp->cp_dispri = 0;
411 cp->cp_identify = 1;
412 memcpy(cp->cp_cdb, cmd->cmnd, COMMAND_SIZE(*cmd->cmnd));
413
414 cp->cp_statDMA = 0;
415
416 cp->cp_viraddr = cp;
417 cp->cmd = cmd;
418 cmd->host_scribble = (char *) &hd->ccb[y];
419
420 if (cmd->use_sg == 0) {
421 cmd->SCp.buffers_residual = 1;
422 cmd->SCp.ptr = cmd->request_buffer;
423 cmd->SCp.this_residual = cmd->request_bufflen;
424 cmd->SCp.buffer = NULL;
425 } else {
426 cmd->SCp.buffer = cmd->request_buffer;
427 cmd->SCp.buffers_residual = cmd->use_sg;
428 cmd->SCp.ptr = page_address(cmd->SCp.buffer->page) + cmd->SCp.buffer->offset;
429 cmd->SCp.this_residual = cmd->SCp.buffer->length;
430 }
431 cmd->SCp.Status = (cmd->SCp.this_residual != 0); /* TRUE as long as bytes
432 * are to transfer */
433
434 if (eata_pio_send_command(base, EATA_CMD_PIO_SEND_CP)) {
435 cmd->result = DID_BUS_BUSY << 16;
436 scmd_printk(KERN_NOTICE, cmd,
437 "eata_pio_queue pid %ld, HBA busy, "
438 "returning DID_BUS_BUSY, done.\n", cmd->pid);
439 done(cmd);
440 cp->status = FREE;
441 return (0);
442 }
443 /* FIXME: timeout */
444 while (!(inb(base + HA_RSTATUS) & HA_SDRQ))
445 cpu_relax();
446 outsw(base + HA_RDATA, cp, hd->cplen);
447 outb(EATA_CMD_PIO_TRUNC, base + HA_WCOMMAND);
448 for (x = 0; x < hd->cppadlen; x++)
449 outw(0, base + HA_RDATA);
450
451 DBG(DBG_QUEUE, scmd_printk(KERN_DEBUG, cmd,
452 "Queued base %#.4lx pid: %ld "
453 "slot %d irq %d\n", sh->base, cmd->pid, y, sh->irq));
454
455 return (0);
456 }
457
458 static int eata_pio_abort(struct scsi_cmnd *cmd)
459 {
460 unsigned int loop = 100;
461
462 DBG(DBG_ABNORM, scmd_printk(KERN_WARNING, cmd,
463 "eata_pio_abort called pid: %ld\n",
464 cmd->pid));
465
466 while (inb(cmd->device->host->base + HA_RAUXSTAT) & HA_ABUSY)
467 if (--loop == 0) {
468 printk(KERN_WARNING "eata_pio: abort, timeout error.\n");
469 return FAILED;
470 }
471 if (CD(cmd)->status == FREE) {
472 DBG(DBG_ABNORM, printk(KERN_WARNING "Returning: SCSI_ABORT_NOT_RUNNING\n"));
473 return FAILED;
474 }
475 if (CD(cmd)->status == USED) {
476 DBG(DBG_ABNORM, printk(KERN_WARNING "Returning: SCSI_ABORT_BUSY\n"));
477 /* We want to sleep a bit more here */
478 return FAILED; /* SNOOZE */
479 }
480 if (CD(cmd)->status == RESET) {
481 printk(KERN_WARNING "eata_pio: abort, command reset error.\n");
482 return FAILED;
483 }
484 if (CD(cmd)->status == LOCKED) {
485 DBG(DBG_ABNORM, printk(KERN_WARNING "eata_pio: abort, queue slot " "locked.\n"));
486 return FAILED;
487 }
488 panic("eata_pio: abort: invalid slot status\n");
489 }
490
491 static int eata_pio_host_reset(struct scsi_cmnd *cmd)
492 {
493 unsigned int x, limit = 0;
494 unsigned char success = 0;
495 struct scsi_cmnd *sp;
496 struct Scsi_Host *host = cmd->device->host;
497
498 DBG(DBG_ABNORM, scmd_printk(KERN_WARNING, cmd,
499 "eata_pio_reset called pid:%ld\n",
500 cmd->pid));
501
502 spin_lock_irq(host->host_lock);
503
504 if (HD(cmd)->state == RESET) {
505 printk(KERN_WARNING "eata_pio_reset: exit, already in reset.\n");
506 spin_unlock_irq(host->host_lock);
507 return FAILED;
508 }
509
510 /* force all slots to be free */
511
512 for (x = 0; x < cmd->device->host->can_queue; x++) {
513
514 if (HD(cmd)->ccb[x].status == FREE)
515 continue;
516
517 sp = HD(cmd)->ccb[x].cmd;
518 HD(cmd)->ccb[x].status = RESET;
519 printk(KERN_WARNING "eata_pio_reset: slot %d in reset, pid %ld.\n", x, sp->pid);
520
521 if (sp == NULL)
522 panic("eata_pio_reset: slot %d, sp==NULL.\n", x);
523 }
524
525 /* hard reset the HBA */
526 outb(EATA_CMD_RESET, cmd->device->host->base + HA_WCOMMAND);
527
528 DBG(DBG_ABNORM, printk(KERN_WARNING "eata_pio_reset: board reset done.\n"));
529 HD(cmd)->state = RESET;
530
531 spin_unlock_irq(host->host_lock);
532 msleep(3000);
533 spin_lock_irq(host->host_lock);
534
535 DBG(DBG_ABNORM, printk(KERN_WARNING "eata_pio_reset: interrupts disabled, " "loops %d.\n", limit));
536
537 for (x = 0; x < cmd->device->host->can_queue; x++) {
538
539 /* Skip slots already set free by interrupt */
540 if (HD(cmd)->ccb[x].status != RESET)
541 continue;
542
543 sp = HD(cmd)->ccb[x].cmd;
544 sp->result = DID_RESET << 16;
545
546 /* This mailbox is terminated */
547 printk(KERN_WARNING "eata_pio_reset: reset ccb %d.\n", x);
548 HD(cmd)->ccb[x].status = FREE;
549
550 sp->scsi_done(sp);
551 }
552
553 HD(cmd)->state = 0;
554
555 spin_unlock_irq(host->host_lock);
556
557 if (success) { /* hmmm... */
558 DBG(DBG_ABNORM, printk(KERN_WARNING "eata_pio_reset: exit, success.\n"));
559 return SUCCESS;
560 } else {
561 DBG(DBG_ABNORM, printk(KERN_WARNING "eata_pio_reset: exit, wakeup.\n"));
562 return FAILED;
563 }
564 }
565
566 static char *get_pio_board_data(unsigned long base, unsigned int irq, unsigned int id, unsigned long cplen, unsigned short cppadlen)
567 {
568 struct eata_ccb cp;
569 static char buff[256];
570 int z;
571
572 memset(&cp, 0, sizeof(struct eata_ccb));
573 memset(buff, 0, sizeof(buff));
574
575 cp.DataIn = 1;
576 cp.Interpret = 1; /* Interpret command */
577
578 cp.cp_datalen = cpu_to_be32(254);
579 cp.cp_dataDMA = cpu_to_be32(0);
580
581 cp.cp_id = id;
582 cp.cp_lun = 0;
583
584 cp.cp_cdb[0] = INQUIRY;
585 cp.cp_cdb[1] = 0;
586 cp.cp_cdb[2] = 0;
587 cp.cp_cdb[3] = 0;
588 cp.cp_cdb[4] = 254;
589 cp.cp_cdb[5] = 0;
590
591 if (eata_pio_send_command(base, EATA_CMD_PIO_SEND_CP))
592 return (NULL);
593 while (!(inb(base + HA_RSTATUS) & HA_SDRQ));
594 outsw(base + HA_RDATA, &cp, cplen);
595 outb(EATA_CMD_PIO_TRUNC, base + HA_WCOMMAND);
596 for (z = 0; z < cppadlen; z++)
597 outw(0, base + HA_RDATA);
598
599 while (inb(base + HA_RSTATUS) & HA_SBUSY);
600 if (inb(base + HA_RSTATUS) & HA_SERROR)
601 return (NULL);
602 else if (!(inb(base + HA_RSTATUS) & HA_SDRQ))
603 return (NULL);
604 else {
605 insw(base + HA_RDATA, &buff, 127);
606 while (inb(base + HA_RSTATUS) & HA_SDRQ)
607 inw(base + HA_RDATA);
608 return (buff);
609 }
610 }
611
612 static int get_pio_conf_PIO(unsigned long base, struct get_conf *buf)
613 {
614 unsigned long loop = HZ / 2;
615 int z;
616 unsigned short *p;
617
618 if (!request_region(base, 9, "eata_pio"))
619 return 0;
620
621 memset(buf, 0, sizeof(struct get_conf));
622
623 while (inb(base + HA_RSTATUS) & HA_SBUSY)
624 if (--loop == 0)
625 goto fail;
626
627 DBG(DBG_PIO && DBG_PROBE, printk(KERN_DEBUG "Issuing PIO READ CONFIG to HBA at %#lx\n", base));
628 eata_pio_send_command(base, EATA_CMD_PIO_READ_CONFIG);
629
630 loop = 50;
631 for (p = (unsigned short *) buf; (long) p <= ((long) buf + (sizeof(struct get_conf) / 2)); p++) {
632 while (!(inb(base + HA_RSTATUS) & HA_SDRQ))
633 if (--loop == 0)
634 goto fail;
635
636 loop = 50;
637 *p = inw(base + HA_RDATA);
638 }
639 if (inb(base + HA_RSTATUS) & HA_SERROR) {
640 DBG(DBG_PROBE, printk("eata_dma: get_conf_PIO, error during "
641 "transfer for HBA at %lx\n", base));
642 goto fail;
643 }
644
645 if (cpu_to_be32(EATA_SIGNATURE) != buf->signature)
646 goto fail;
647
648 DBG(DBG_PIO && DBG_PROBE, printk(KERN_NOTICE "EATA Controller found "
649 "at %#4lx EATA Level: %x\n",
650 base, (unsigned int) (buf->version)));
651
652 while (inb(base + HA_RSTATUS) & HA_SDRQ)
653 inw(base + HA_RDATA);
654
655 if (!ALLOW_DMA_BOARDS) {
656 for (z = 0; z < MAXISA; z++)
657 if (base == ISAbases[z]) {
658 buf->IRQ = ISAirqs[z];
659 break;
660 }
661 }
662
663 return 1;
664
665 fail:
666 release_region(base, 9);
667 return 0;
668 }
669
670 static void print_pio_config(struct get_conf *gc)
671 {
672 printk("Please check values: (read config data)\n");
673 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);
674 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);
675 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);
676 }
677
678 static unsigned int print_selftest(unsigned int base)
679 {
680 unsigned char buffer[512];
681 #ifdef VERBOSE_SETUP
682 int z;
683 #endif
684
685 printk("eata_pio: executing controller self test & setup...\n");
686 while (inb(base + HA_RSTATUS) & HA_SBUSY);
687 outb(EATA_CMD_PIO_SETUPTEST, base + HA_WCOMMAND);
688 do {
689 while (inb(base + HA_RSTATUS) & HA_SBUSY)
690 /* nothing */ ;
691 if (inb(base + HA_RSTATUS) & HA_SDRQ) {
692 insw(base + HA_RDATA, &buffer, 256);
693 #ifdef VERBOSE_SETUP
694 /* no beeps please... */
695 for (z = 0; z < 511 && buffer[z]; z++)
696 if (buffer[z] != 7)
697 printk("%c", buffer[z]);
698 #endif
699 }
700 } while (inb(base + HA_RSTATUS) & (HA_SBUSY | HA_SDRQ));
701
702 return (!(inb(base + HA_RSTATUS) & HA_SERROR));
703 }
704
705 static int register_pio_HBA(long base, struct get_conf *gc, struct pci_dev *pdev)
706 {
707 unsigned long size = 0;
708 char *buff;
709 unsigned long cplen;
710 unsigned short cppadlen;
711 struct Scsi_Host *sh;
712 hostdata *hd;
713
714 DBG(DBG_REGISTER, print_pio_config(gc));
715
716 if (gc->DMA_support) {
717 printk("HBA at %#.4lx supports DMA. Please use EATA-DMA driver.\n", base);
718 if (!ALLOW_DMA_BOARDS)
719 return 0;
720 }
721
722 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) {
723 printk("HBA at %#lx didn't react on INQUIRY. Sorry.\n", base);
724 return 0;
725 }
726
727 if (!print_selftest(base) && !ALLOW_DMA_BOARDS) {
728 printk("HBA at %#lx failed while performing self test & setup.\n", base);
729 return 0;
730 }
731
732 size = sizeof(hostdata) + (sizeof(struct eata_ccb) * be16_to_cpu(gc->queuesiz));
733
734 sh = scsi_register(&driver_template, size);
735 if (sh == NULL)
736 return 0;
737
738 if (!reg_IRQ[gc->IRQ]) { /* Interrupt already registered ? */
739 if (!request_irq(gc->IRQ, do_eata_pio_int_handler, IRQF_DISABLED, "EATA-PIO", sh)) {
740 reg_IRQ[gc->IRQ]++;
741 if (!gc->IRQ_TR)
742 reg_IRQL[gc->IRQ] = 1; /* IRQ is edge triggered */
743 } else {
744 printk("Couldn't allocate IRQ %d, Sorry.\n", gc->IRQ);
745 return 0;
746 }
747 } else { /* More than one HBA on this IRQ */
748 if (reg_IRQL[gc->IRQ]) {
749 printk("Can't support more than one HBA on this IRQ,\n" " if the IRQ is edge triggered. Sorry.\n");
750 return 0;
751 } else
752 reg_IRQ[gc->IRQ]++;
753 }
754
755 hd = SD(sh);
756
757 memset(hd->ccb, 0, (sizeof(struct eata_ccb) * be16_to_cpu(gc->queuesiz)));
758 memset(hd->reads, 0, sizeof(hd->reads));
759
760 strlcpy(SD(sh)->vendor, &buff[8], sizeof(SD(sh)->vendor));
761 strlcpy(SD(sh)->name, &buff[16], sizeof(SD(sh)->name));
762 SD(sh)->revision[0] = buff[32];
763 SD(sh)->revision[1] = buff[33];
764 SD(sh)->revision[2] = buff[34];
765 SD(sh)->revision[3] = '.';
766 SD(sh)->revision[4] = buff[35];
767 SD(sh)->revision[5] = 0;
768
769 switch (be32_to_cpu(gc->len)) {
770 case 0x1c:
771 SD(sh)->EATA_revision = 'a';
772 break;
773 case 0x1e:
774 SD(sh)->EATA_revision = 'b';
775 break;
776 case 0x22:
777 SD(sh)->EATA_revision = 'c';
778 break;
779 case 0x24:
780 SD(sh)->EATA_revision = 'z';
781 default:
782 SD(sh)->EATA_revision = '?';
783 }
784
785 if (be32_to_cpu(gc->len) >= 0x22) {
786 if (gc->is_PCI)
787 hd->bustype = IS_PCI;
788 else if (gc->is_EISA)
789 hd->bustype = IS_EISA;
790 else
791 hd->bustype = IS_ISA;
792 } else {
793 if (buff[21] == '4')
794 hd->bustype = IS_PCI;
795 else if (buff[21] == '2')
796 hd->bustype = IS_EISA;
797 else
798 hd->bustype = IS_ISA;
799 }
800
801 SD(sh)->cplen = cplen;
802 SD(sh)->cppadlen = cppadlen;
803 SD(sh)->hostid = gc->scsi_id[3];
804 SD(sh)->devflags = 1 << gc->scsi_id[3];
805 SD(sh)->moresupport = gc->MORE_support;
806 sh->unique_id = base;
807 sh->base = base;
808 sh->io_port = base;
809 sh->n_io_port = 9;
810 sh->irq = gc->IRQ;
811 sh->dma_channel = PIO;
812 sh->this_id = gc->scsi_id[3];
813 sh->can_queue = 1;
814 sh->cmd_per_lun = 1;
815 sh->sg_tablesize = SG_ALL;
816
817 hd->channel = 0;
818
819 hd->pdev = pci_dev_get(pdev); /* Keep a PCI reference */
820
821 sh->max_id = 8;
822 sh->max_lun = 8;
823
824 if (gc->SECOND)
825 hd->primary = 0;
826 else
827 hd->primary = 1;
828
829 sh->unchecked_isa_dma = 0; /* We can only do PIO */
830
831 hd->next = NULL; /* build a linked list of all HBAs */
832 hd->prev = last_HBA;
833 if (hd->prev != NULL)
834 SD(hd->prev)->next = sh;
835 last_HBA = sh;
836 if (first_HBA == NULL)
837 first_HBA = sh;
838 registered_HBAs++;
839 return (1);
840 }
841
842 static void find_pio_ISA(struct get_conf *buf)
843 {
844 int i;
845
846 for (i = 0; i < MAXISA; i++) {
847 if (!ISAbases[i])
848 continue;
849 if (!get_pio_conf_PIO(ISAbases[i], buf))
850 continue;
851 if (!register_pio_HBA(ISAbases[i], buf, NULL))
852 release_region(ISAbases[i], 9);
853 else
854 ISAbases[i] = 0;
855 }
856 return;
857 }
858
859 static void find_pio_EISA(struct get_conf *buf)
860 {
861 u32 base;
862 int i;
863
864 #ifdef CHECKPAL
865 u8 pal1, pal2, pal3;
866 #endif
867
868 for (i = 0; i < MAXEISA; i++) {
869 if (EISAbases[i]) { /* Still a possibility ? */
870
871 base = 0x1c88 + (i * 0x1000);
872 #ifdef CHECKPAL
873 pal1 = inb((u16) base - 8);
874 pal2 = inb((u16) base - 7);
875 pal3 = inb((u16) base - 6);
876
877 if (((pal1 == 0x12) && (pal2 == 0x14)) || ((pal1 == 0x38) && (pal2 == 0xa3) && (pal3 == 0x82)) || ((pal1 == 0x06) && (pal2 == 0x94) && (pal3 == 0x24))) {
878 DBG(DBG_PROBE, printk(KERN_NOTICE "EISA EATA id tags found: " "%x %x %x \n", (int) pal1, (int) pal2, (int) pal3));
879 #endif
880 if (get_pio_conf_PIO(base, buf)) {
881 DBG(DBG_PROBE && DBG_EISA, print_pio_config(buf));
882 if (buf->IRQ) {
883 if (!register_pio_HBA(base, buf, NULL))
884 release_region(base, 9);
885 } else {
886 printk(KERN_NOTICE "eata_dma: No valid IRQ. HBA " "removed from list\n");
887 release_region(base, 9);
888 }
889 }
890 /* Nothing found here so we take it from the list */
891 EISAbases[i] = 0;
892 #ifdef CHECKPAL
893 }
894 #endif
895 }
896 }
897 return;
898 }
899
900 static void find_pio_PCI(struct get_conf *buf)
901 {
902 #ifndef CONFIG_PCI
903 printk("eata_dma: kernel PCI support not enabled. Skipping scan for PCI HBAs.\n");
904 #else
905 struct pci_dev *dev = NULL;
906 unsigned long base, x;
907
908 while ((dev = pci_get_device(PCI_VENDOR_ID_DPT, PCI_DEVICE_ID_DPT, dev)) != NULL) {
909 DBG(DBG_PROBE && DBG_PCI, printk("eata_pio: find_PCI, HBA at %s\n", pci_name(dev)));
910 if (pci_enable_device(dev))
911 continue;
912 pci_set_master(dev);
913 base = pci_resource_flags(dev, 0);
914 if (base & IORESOURCE_MEM) {
915 printk("eata_pio: invalid base address of device %s\n", pci_name(dev));
916 continue;
917 }
918 base = pci_resource_start(dev, 0);
919 /* EISA tag there ? */
920 if ((inb(base) == 0x12) && (inb(base + 1) == 0x14))
921 continue; /* Jep, it's forced, so move on */
922 base += 0x10; /* Now, THIS is the real address */
923 if (base != 0x1f8) {
924 /* We didn't find it in the primary search */
925 if (get_pio_conf_PIO(base, buf)) {
926 if (buf->FORCADR) { /* If the address is forced */
927 release_region(base, 9);
928 continue; /* we'll find it later */
929 }
930
931 /* OK. We made it till here, so we can go now
932 * and register it. We only have to check and
933 * eventually remove it from the EISA and ISA list
934 */
935
936 if (!register_pio_HBA(base, buf, dev)) {
937 release_region(base, 9);
938 continue;
939 }
940
941 if (base < 0x1000) {
942 for (x = 0; x < MAXISA; ++x) {
943 if (ISAbases[x] == base) {
944 ISAbases[x] = 0;
945 break;
946 }
947 }
948 } else if ((base & 0x0fff) == 0x0c88) {
949 x = (base >> 12) & 0x0f;
950 EISAbases[x] = 0;
951 }
952 }
953 #ifdef CHECK_BLINK
954 else if (check_blink_state(base)) {
955 printk("eata_pio: HBA is in BLINK state.\n" "Consult your HBAs manual to correct this.\n");
956 }
957 #endif
958 }
959 }
960 #endif /* #ifndef CONFIG_PCI */
961 }
962
963 static int eata_pio_detect(struct scsi_host_template *tpnt)
964 {
965 struct Scsi_Host *HBA_ptr;
966 struct get_conf gc;
967 int i;
968
969 find_pio_PCI(&gc);
970 find_pio_EISA(&gc);
971 find_pio_ISA(&gc);
972
973 for (i = 0; i <= MAXIRQ; i++)
974 if (reg_IRQ[i])
975 request_irq(i, do_eata_pio_int_handler, IRQF_DISABLED, "EATA-PIO", NULL);
976
977 HBA_ptr = first_HBA;
978
979 if (registered_HBAs != 0) {
980 printk("EATA (Extended Attachment) PIO driver version: %d.%d%s\n"
981 "(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);
982
983 printk("Registered HBAs:\n");
984 printk("HBA no. Boardtype: Revis: EATA: Bus: BaseIO: IRQ: Ch: ID: Pr:" " QS: SG: CPL:\n");
985 for (i = 1; i <= registered_HBAs; i++) {
986 printk("scsi%-2d: %.10s v%s 2.0%c %s %#.4lx %2d %d %d %c"
987 " %2d %2d %2d\n",
988 HBA_ptr->host_no, SD(HBA_ptr)->name, SD(HBA_ptr)->revision,
989 SD(HBA_ptr)->EATA_revision, (SD(HBA_ptr)->bustype == 'P') ?
990 "PCI " : (SD(HBA_ptr)->bustype == 'E') ? "EISA" : "ISA ",
991 HBA_ptr->base, HBA_ptr->irq, SD(HBA_ptr)->channel, HBA_ptr->this_id,
992 SD(HBA_ptr)->primary ? 'Y' : 'N', HBA_ptr->can_queue,
993 HBA_ptr->sg_tablesize, HBA_ptr->cmd_per_lun);
994 HBA_ptr = SD(HBA_ptr)->next;
995 }
996 }
997 return (registered_HBAs);
998 }
999
1000 static struct scsi_host_template driver_template = {
1001 .proc_name = "eata_pio",
1002 .name = "EATA (Extended Attachment) PIO driver",
1003 .proc_info = eata_pio_proc_info,
1004 .detect = eata_pio_detect,
1005 .release = eata_pio_release,
1006 .queuecommand = eata_pio_queue,
1007 .eh_abort_handler = eata_pio_abort,
1008 .eh_host_reset_handler = eata_pio_host_reset,
1009 .use_clustering = ENABLE_CLUSTERING,
1010 };
1011
1012 MODULE_AUTHOR("Michael Neuffer, Alfred Arnold");
1013 MODULE_DESCRIPTION("EATA SCSI PIO driver");
1014 MODULE_LICENSE("GPL");
1015
1016 #include "scsi_module.c"
Tomato firmware and modifications.