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