blob: d312633db92beba41e1808e36e3b3cab2620147a [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/************************************************************
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
Linus Torvalds1da177e2005-04-16 15:20:36 -070049#include <linux/module.h>
50#include <linux/kernel.h>
51#include <linux/sched.h>
52#include <linux/string.h>
53#include <linux/ioport.h>
54#include <linux/slab.h>
55#include <linux/in.h>
56#include <linux/pci.h>
57#include <linux/proc_fs.h>
58#include <linux/interrupt.h>
59#include <linux/blkdev.h>
60#include <linux/spinlock.h>
61#include <linux/delay.h>
62
63#include <asm/io.h>
64
65#include <scsi/scsi.h>
66#include <scsi/scsi_cmnd.h>
67#include <scsi/scsi_device.h>
68#include <scsi/scsi_host.h>
69
70#include "eata_generic.h"
71#include "eata_pio.h"
72
73
Alan Cox1a68d412006-09-18 19:18:34 +010074static unsigned int ISAbases[MAXISA] = {
Linus Torvalds1da177e2005-04-16 15:20:36 -070075 0x1F0, 0x170, 0x330, 0x230
76};
77
Alan Cox1a68d412006-09-18 19:18:34 +010078static unsigned int ISAirqs[MAXISA] = {
Linus Torvalds1da177e2005-04-16 15:20:36 -070079 14, 12, 15, 11
80};
81
82static unsigned char EISAbases[] = {
83 1, 1, 1, 1, 1, 1, 1, 1,
84 1, 1, 1, 1, 1, 1, 1, 1
85};
86
Alan Cox1a68d412006-09-18 19:18:34 +010087static unsigned int registered_HBAs;
Linus Torvalds1da177e2005-04-16 15:20:36 -070088static struct Scsi_Host *last_HBA;
89static struct Scsi_Host *first_HBA;
90static unsigned char reg_IRQ[16];
91static unsigned char reg_IRQL[16];
92static unsigned long int_counter;
93static unsigned long queue_counter;
94
95static struct scsi_host_template driver_template;
96
97/*
98 * eata_proc_info
99 * inout : decides on the direction of the dataflow and the meaning of the
100 * variables
101 * buffer: If inout==FALSE data is being written to it else read from it
102 * *start: If inout==FALSE start of the valid data in the buffer
103 * offset: If inout==FALSE offset from the beginning of the imaginary file
104 * from which we start writing into the buffer
105 * length: If inout==FALSE max number of bytes to be written into the buffer
106 * else number of bytes in the buffer
107 */
108static int eata_pio_proc_info(struct Scsi_Host *shost, char *buffer, char **start, off_t offset,
109 int length, int rw)
110{
111 static u8 buff[512];
112 int size, len = 0;
113 off_t begin = 0, pos = 0;
114
115 if (rw)
116 return -ENOSYS;
117 if (offset == 0)
118 memset(buff, 0, sizeof(buff));
119
120 size = sprintf(buffer+len, "EATA (Extended Attachment) PIO driver version: "
121 "%d.%d%s\n",VER_MAJOR, VER_MINOR, VER_SUB);
122 len += size; pos = begin + len;
123 size = sprintf(buffer + len, "queued commands: %10ld\n"
124 "processed interrupts:%10ld\n", queue_counter, int_counter);
125 len += size; pos = begin + len;
126
127 size = sprintf(buffer + len, "\nscsi%-2d: HBA %.10s\n",
128 shost->host_no, SD(shost)->name);
129 len += size;
130 pos = begin + len;
131 size = sprintf(buffer + len, "Firmware revision: v%s\n",
132 SD(shost)->revision);
133 len += size;
134 pos = begin + len;
135 size = sprintf(buffer + len, "IO: PIO\n");
136 len += size;
137 pos = begin + len;
138 size = sprintf(buffer + len, "Base IO : %#.4x\n", (u32) shost->base);
139 len += size;
140 pos = begin + len;
141 size = sprintf(buffer + len, "Host Bus: %s\n",
142 (SD(shost)->bustype == 'P')?"PCI ":
143 (SD(shost)->bustype == 'E')?"EISA":"ISA ");
144
145 len += size;
146 pos = begin + len;
147
148 if (pos < offset) {
149 len = 0;
150 begin = pos;
151 }
152 if (pos > offset + length)
153 goto stop_output;
154
155 stop_output:
156 DBG(DBG_PROC, printk("2pos: %ld offset: %ld len: %d\n", pos, offset, len));
157 *start=buffer+(offset-begin); /* Start of wanted data */
158 len-=(offset-begin); /* Start slop */
159 if(len>length)
160 len = length; /* Ending slop */
161 DBG(DBG_PROC, printk("3pos: %ld offset: %ld len: %d\n", pos, offset, len));
162
163 return (len);
164}
165
166static int eata_pio_release(struct Scsi_Host *sh)
167{
Alan Cox1a68d412006-09-18 19:18:34 +0100168 hostdata *hd = SD(sh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700169 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 }
Alan Cox1a68d412006-09-18 19:18:34 +0100177 /* At this point the PCI reference can go */
178 if (hd->pdev)
179 pci_dev_put(hd->pdev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700180 return 1;
181}
182
Alan Cox1a68d412006-09-18 19:18:34 +0100183static void IncStat(struct scsi_pointer *SCp, unsigned int Increment)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700184{
185 SCp->ptr += Increment;
186 if ((SCp->this_residual -= Increment) == 0) {
187 if ((--SCp->buffers_residual) == 0)
188 SCp->Status = 0;
189 else {
190 SCp->buffer++;
191 SCp->ptr = page_address(SCp->buffer->page) + SCp->buffer->offset;
192 SCp->this_residual = SCp->buffer->length;
193 }
194 }
195}
196
Alan Cox1a68d412006-09-18 19:18:34 +0100197static irqreturn_t eata_pio_int_handler(int irq, void *dev_id, struct pt_regs *regs);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700198
199static irqreturn_t do_eata_pio_int_handler(int irq, void *dev_id,
200 struct pt_regs *regs)
201{
202 unsigned long flags;
203 struct Scsi_Host *dev = dev_id;
Alan Cox1a68d412006-09-18 19:18:34 +0100204 irqreturn_t ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700205
206 spin_lock_irqsave(dev->host_lock, flags);
Alan Cox1a68d412006-09-18 19:18:34 +0100207 ret = eata_pio_int_handler(irq, dev_id, regs);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700208 spin_unlock_irqrestore(dev->host_lock, flags);
Alan Cox1a68d412006-09-18 19:18:34 +0100209 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700210}
211
Alan Cox1a68d412006-09-18 19:18:34 +0100212static irqreturn_t eata_pio_int_handler(int irq, void *dev_id, struct pt_regs *regs)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700213{
Alan Cox1a68d412006-09-18 19:18:34 +0100214 unsigned int eata_stat = 0xfffff;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700215 struct scsi_cmnd *cmd;
216 hostdata *hd;
217 struct eata_ccb *cp;
Alan Cox1a68d412006-09-18 19:18:34 +0100218 unsigned long base;
219 unsigned int x, z;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700220 struct Scsi_Host *sh;
221 unsigned short zwickel = 0;
222 unsigned char stat, odd;
Alan Cox1a68d412006-09-18 19:18:34 +0100223 irqreturn_t ret = IRQ_NONE;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700224
225 for (x = 1, sh = first_HBA; x <= registered_HBAs; x++, sh = SD(sh)->prev)
226 {
227 if (sh->irq != irq)
228 continue;
Alan Cox1a68d412006-09-18 19:18:34 +0100229 if (inb(sh->base + HA_RSTATUS) & HA_SBUSY)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700230 continue;
231
232 int_counter++;
Alan Cox1a68d412006-09-18 19:18:34 +0100233 ret = IRQ_HANDLED;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700234
235 hd = SD(sh);
236
237 cp = &hd->ccb[0];
238 cmd = cp->cmd;
Alan Cox1a68d412006-09-18 19:18:34 +0100239 base = cmd->device->host->base;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700240
241 do {
242 stat = inb(base + HA_RSTATUS);
243 if (stat & HA_SDRQ) {
244 if (cp->DataIn) {
245 z = 256;
246 odd = 0;
247 while ((cmd->SCp.Status) && ((z > 0) || (odd))) {
248 if (odd) {
249 *(cmd->SCp.ptr) = zwickel >> 8;
250 IncStat(&cmd->SCp, 1);
251 odd = 0;
252 }
253 x = min_t(unsigned int, z, cmd->SCp.this_residual / 2);
254 insw(base + HA_RDATA, cmd->SCp.ptr, x);
255 z -= x;
256 IncStat(&cmd->SCp, 2 * x);
257 if ((z > 0) && (cmd->SCp.this_residual == 1)) {
258 zwickel = inw(base + HA_RDATA);
259 *(cmd->SCp.ptr) = zwickel & 0xff;
260 IncStat(&cmd->SCp, 1);
261 z--;
262 odd = 1;
263 }
264 }
265 while (z > 0) {
266 zwickel = inw(base + HA_RDATA);
267 z--;
268 }
269 } else { /* cp->DataOut */
270
271 odd = 0;
272 z = 256;
273 while ((cmd->SCp.Status) && ((z > 0) || (odd))) {
274 if (odd) {
275 zwickel += *(cmd->SCp.ptr) << 8;
276 IncStat(&cmd->SCp, 1);
277 outw(zwickel, base + HA_RDATA);
278 z--;
279 odd = 0;
280 }
281 x = min_t(unsigned int, z, cmd->SCp.this_residual / 2);
282 outsw(base + HA_RDATA, cmd->SCp.ptr, x);
283 z -= x;
284 IncStat(&cmd->SCp, 2 * x);
285 if ((z > 0) && (cmd->SCp.this_residual == 1)) {
286 zwickel = *(cmd->SCp.ptr);
287 zwickel &= 0xff;
288 IncStat(&cmd->SCp, 1);
289 odd = 1;
290 }
291 }
292 while (z > 0 || odd) {
293 outw(zwickel, base + HA_RDATA);
294 z--;
295 odd = 0;
296 }
297 }
298 }
299 }
300 while ((stat & HA_SDRQ) || ((stat & HA_SMORE) && hd->moresupport));
301
302 /* terminate handler if HBA goes busy again, i.e. transfers
303 * more data */
304
305 if (stat & HA_SBUSY)
306 break;
307
308 /* OK, this is quite stupid, but I haven't found any correct
309 * way to get HBA&SCSI status so far */
310
311 if (!(inb(base + HA_RSTATUS) & HA_SERROR)) {
312 cmd->result = (DID_OK << 16);
313 hd->devflags |= (1 << cp->cp_id);
Alan Cox1a68d412006-09-18 19:18:34 +0100314 } else if (hd->devflags & (1 << cp->cp_id))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700315 cmd->result = (DID_OK << 16) + 0x02;
316 else
317 cmd->result = (DID_NO_CONNECT << 16);
318
319 if (cp->status == LOCKED) {
320 cp->status = FREE;
321 eata_stat = inb(base + HA_RSTATUS);
322 printk(KERN_CRIT "eata_pio: int_handler, freeing locked " "queueslot\n");
Alan Cox1a68d412006-09-18 19:18:34 +0100323 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700324 }
325#if DBG_INTR2
326 if (stat != 0x50)
327 printk(KERN_DEBUG "stat: %#.2x, result: %#.8x\n", stat, cmd->result);
328#endif
329
330 cp->status = FREE; /* now we can release the slot */
331
332 cmd->scsi_done(cmd);
333 }
334
Alan Cox1a68d412006-09-18 19:18:34 +0100335 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700336}
337
Alan Cox1a68d412006-09-18 19:18:34 +0100338static inline unsigned int eata_pio_send_command(unsigned long base, unsigned char command)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700339{
Alan Cox1a68d412006-09-18 19:18:34 +0100340 unsigned int loop = 50;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700341
342 while (inb(base + HA_RSTATUS) & HA_SBUSY)
343 if (--loop == 0)
344 return 1;
345
346 /* Enable interrupts for HBA. It is not the best way to do it at this
347 * place, but I hope that it doesn't interfere with the IDE driver
348 * initialization this way */
349
350 outb(HA_CTRL_8HEADS, base + HA_CTRLREG);
351
352 outb(command, base + HA_WCOMMAND);
353 return 0;
354}
355
356static int eata_pio_queue(struct scsi_cmnd *cmd,
357 void (*done)(struct scsi_cmnd *))
358{
Alan Cox1a68d412006-09-18 19:18:34 +0100359 unsigned int x, y;
360 unsigned long base;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700361
362 hostdata *hd;
363 struct Scsi_Host *sh;
364 struct eata_ccb *cp;
365
366 queue_counter++;
367
368 hd = HD(cmd);
369 sh = cmd->device->host;
Alan Cox1a68d412006-09-18 19:18:34 +0100370 base = sh->base;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700371
372 /* use only slot 0, as 2001 can handle only one cmd at a time */
373
374 y = x = 0;
375
376 if (hd->ccb[y].status != FREE) {
377
378 DBG(DBG_QUEUE, printk(KERN_EMERG "can_queue %d, x %d, y %d\n", sh->can_queue, x, y));
379#if DEBUG_EATA
380 panic(KERN_EMERG "eata_pio: run out of queue slots cmdno:%ld " "intrno: %ld\n", queue_counter, int_counter);
381#else
382 panic(KERN_EMERG "eata_pio: run out of queue slots....\n");
383#endif
384 }
385
386 cp = &hd->ccb[y];
387
388 memset(cp, 0, sizeof(struct eata_ccb));
389 memset(cmd->sense_buffer, 0, sizeof(cmd->sense_buffer));
390
391 cp->status = USED; /* claim free slot */
392
Jeff Garzik017560f2005-10-24 18:04:36 -0400393 DBG(DBG_QUEUE, scmd_printk(KERN_DEBUG, cmd,
394 "eata_pio_queue pid %ld, y %d\n",
395 cmd->pid, y));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700396
397 cmd->scsi_done = (void *) done;
398
399 if (cmd->sc_data_direction == DMA_TO_DEVICE)
400 cp->DataOut = 1; /* Output mode */
401 else
402 cp->DataIn = 0; /* Input mode */
403
404 cp->Interpret = (cmd->device->id == hd->hostid);
Alan Cox1a68d412006-09-18 19:18:34 +0100405 cp->cp_datalen = cpu_to_be32(cmd->request_bufflen);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700406 cp->Auto_Req_Sen = 0;
Alan Cox1a68d412006-09-18 19:18:34 +0100407 cp->cp_reqDMA = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700408 cp->reqlen = 0;
409
410 cp->cp_id = cmd->device->id;
411 cp->cp_lun = cmd->device->lun;
412 cp->cp_dispri = 0;
413 cp->cp_identify = 1;
414 memcpy(cp->cp_cdb, cmd->cmnd, COMMAND_SIZE(*cmd->cmnd));
415
Alan Cox1a68d412006-09-18 19:18:34 +0100416 cp->cp_statDMA = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700417
418 cp->cp_viraddr = cp;
419 cp->cmd = cmd;
420 cmd->host_scribble = (char *) &hd->ccb[y];
421
422 if (cmd->use_sg == 0) {
423 cmd->SCp.buffers_residual = 1;
424 cmd->SCp.ptr = cmd->request_buffer;
425 cmd->SCp.this_residual = cmd->request_bufflen;
426 cmd->SCp.buffer = NULL;
427 } else {
428 cmd->SCp.buffer = cmd->request_buffer;
429 cmd->SCp.buffers_residual = cmd->use_sg;
430 cmd->SCp.ptr = page_address(cmd->SCp.buffer->page) + cmd->SCp.buffer->offset;
431 cmd->SCp.this_residual = cmd->SCp.buffer->length;
432 }
433 cmd->SCp.Status = (cmd->SCp.this_residual != 0); /* TRUE as long as bytes
434 * are to transfer */
435
436 if (eata_pio_send_command(base, EATA_CMD_PIO_SEND_CP)) {
437 cmd->result = DID_BUS_BUSY << 16;
Jeff Garzik017560f2005-10-24 18:04:36 -0400438 scmd_printk(KERN_NOTICE, cmd,
439 "eata_pio_queue pid %ld, HBA busy, "
440 "returning DID_BUS_BUSY, done.\n", cmd->pid);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700441 done(cmd);
442 cp->status = FREE;
443 return (0);
444 }
445 /* FIXME: timeout */
446 while (!(inb(base + HA_RSTATUS) & HA_SDRQ))
447 cpu_relax();
448 outsw(base + HA_RDATA, cp, hd->cplen);
449 outb(EATA_CMD_PIO_TRUNC, base + HA_WCOMMAND);
450 for (x = 0; x < hd->cppadlen; x++)
451 outw(0, base + HA_RDATA);
452
Jeff Garzik017560f2005-10-24 18:04:36 -0400453 DBG(DBG_QUEUE, scmd_printk(KERN_DEBUG, cmd,
454 "Queued base %#.4lx pid: %ld "
Alan Cox1a68d412006-09-18 19:18:34 +0100455 "slot %d irq %d\n", sh->base, cmd->pid, y, sh->irq));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700456
457 return (0);
458}
459
460static int eata_pio_abort(struct scsi_cmnd *cmd)
461{
Alan Cox1a68d412006-09-18 19:18:34 +0100462 unsigned int loop = 100;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700463
Jeff Garzik017560f2005-10-24 18:04:36 -0400464 DBG(DBG_ABNORM, scmd_printk(KERN_WARNING, cmd,
465 "eata_pio_abort called pid: %ld\n",
466 cmd->pid));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700467
468 while (inb(cmd->device->host->base + HA_RAUXSTAT) & HA_ABUSY)
469 if (--loop == 0) {
470 printk(KERN_WARNING "eata_pio: abort, timeout error.\n");
471 return FAILED;
472 }
473 if (CD(cmd)->status == FREE) {
474 DBG(DBG_ABNORM, printk(KERN_WARNING "Returning: SCSI_ABORT_NOT_RUNNING\n"));
475 return FAILED;
476 }
477 if (CD(cmd)->status == USED) {
478 DBG(DBG_ABNORM, printk(KERN_WARNING "Returning: SCSI_ABORT_BUSY\n"));
479 /* We want to sleep a bit more here */
480 return FAILED; /* SNOOZE */
481 }
482 if (CD(cmd)->status == RESET) {
483 printk(KERN_WARNING "eata_pio: abort, command reset error.\n");
484 return FAILED;
485 }
486 if (CD(cmd)->status == LOCKED) {
487 DBG(DBG_ABNORM, printk(KERN_WARNING "eata_pio: abort, queue slot " "locked.\n"));
488 return FAILED;
489 }
490 panic("eata_pio: abort: invalid slot status\n");
491}
492
493static int eata_pio_host_reset(struct scsi_cmnd *cmd)
494{
Alan Cox1a68d412006-09-18 19:18:34 +0100495 unsigned int x, limit = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700496 unsigned char success = 0;
497 struct scsi_cmnd *sp;
498 struct Scsi_Host *host = cmd->device->host;
499
Jeff Garzik017560f2005-10-24 18:04:36 -0400500 DBG(DBG_ABNORM, scmd_printk(KERN_WARNING, cmd,
501 "eata_pio_reset called pid:%ld\n",
502 cmd->pid));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700503
Jeff Garzik df0ae242005-05-28 07:57:14 -0400504 spin_lock_irq(host->host_lock);
505
Linus Torvalds1da177e2005-04-16 15:20:36 -0700506 if (HD(cmd)->state == RESET) {
507 printk(KERN_WARNING "eata_pio_reset: exit, already in reset.\n");
Jeff Garzik df0ae242005-05-28 07:57:14 -0400508 spin_unlock_irq(host->host_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700509 return FAILED;
510 }
511
512 /* force all slots to be free */
513
514 for (x = 0; x < cmd->device->host->can_queue; x++) {
515
516 if (HD(cmd)->ccb[x].status == FREE)
517 continue;
518
519 sp = HD(cmd)->ccb[x].cmd;
520 HD(cmd)->ccb[x].status = RESET;
521 printk(KERN_WARNING "eata_pio_reset: slot %d in reset, pid %ld.\n", x, sp->pid);
522
523 if (sp == NULL)
524 panic("eata_pio_reset: slot %d, sp==NULL.\n", x);
525 }
526
527 /* hard reset the HBA */
Alan Cox1a68d412006-09-18 19:18:34 +0100528 outb(EATA_CMD_RESET, cmd->device->host->base + HA_WCOMMAND);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700529
530 DBG(DBG_ABNORM, printk(KERN_WARNING "eata_pio_reset: board reset done.\n"));
531 HD(cmd)->state = RESET;
532
533 spin_unlock_irq(host->host_lock);
534 msleep(3000);
535 spin_lock_irq(host->host_lock);
536
537 DBG(DBG_ABNORM, printk(KERN_WARNING "eata_pio_reset: interrupts disabled, " "loops %d.\n", limit));
538
539 for (x = 0; x < cmd->device->host->can_queue; x++) {
540
541 /* Skip slots already set free by interrupt */
542 if (HD(cmd)->ccb[x].status != RESET)
543 continue;
544
545 sp = HD(cmd)->ccb[x].cmd;
546 sp->result = DID_RESET << 16;
547
548 /* This mailbox is terminated */
549 printk(KERN_WARNING "eata_pio_reset: reset ccb %d.\n", x);
550 HD(cmd)->ccb[x].status = FREE;
551
552 sp->scsi_done(sp);
553 }
554
555 HD(cmd)->state = 0;
556
Jeff Garzik df0ae242005-05-28 07:57:14 -0400557 spin_unlock_irq(host->host_lock);
558
Linus Torvalds1da177e2005-04-16 15:20:36 -0700559 if (success) { /* hmmm... */
560 DBG(DBG_ABNORM, printk(KERN_WARNING "eata_pio_reset: exit, success.\n"));
561 return SUCCESS;
562 } else {
563 DBG(DBG_ABNORM, printk(KERN_WARNING "eata_pio_reset: exit, wakeup.\n"));
564 return FAILED;
565 }
566}
567
Alan Cox1a68d412006-09-18 19:18:34 +0100568static char *get_pio_board_data(unsigned long base, unsigned int irq, unsigned int id, unsigned long cplen, unsigned short cppadlen)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700569{
570 struct eata_ccb cp;
571 static char buff[256];
572 int z;
573
574 memset(&cp, 0, sizeof(struct eata_ccb));
575 memset(buff, 0, sizeof(buff));
576
577 cp.DataIn = 1;
578 cp.Interpret = 1; /* Interpret command */
579
Alan Cox1a68d412006-09-18 19:18:34 +0100580 cp.cp_datalen = cpu_to_be32(254);
581 cp.cp_dataDMA = cpu_to_be32(0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700582
583 cp.cp_id = id;
584 cp.cp_lun = 0;
585
586 cp.cp_cdb[0] = INQUIRY;
587 cp.cp_cdb[1] = 0;
588 cp.cp_cdb[2] = 0;
589 cp.cp_cdb[3] = 0;
590 cp.cp_cdb[4] = 254;
591 cp.cp_cdb[5] = 0;
592
Alan Cox1a68d412006-09-18 19:18:34 +0100593 if (eata_pio_send_command(base, EATA_CMD_PIO_SEND_CP))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700594 return (NULL);
595 while (!(inb(base + HA_RSTATUS) & HA_SDRQ));
596 outsw(base + HA_RDATA, &cp, cplen);
597 outb(EATA_CMD_PIO_TRUNC, base + HA_WCOMMAND);
598 for (z = 0; z < cppadlen; z++)
599 outw(0, base + HA_RDATA);
600
601 while (inb(base + HA_RSTATUS) & HA_SBUSY);
602 if (inb(base + HA_RSTATUS) & HA_SERROR)
603 return (NULL);
604 else if (!(inb(base + HA_RSTATUS) & HA_SDRQ))
605 return (NULL);
606 else {
607 insw(base + HA_RDATA, &buff, 127);
608 while (inb(base + HA_RSTATUS) & HA_SDRQ)
609 inw(base + HA_RDATA);
610 return (buff);
611 }
612}
613
Alan Cox1a68d412006-09-18 19:18:34 +0100614static int get_pio_conf_PIO(unsigned long base, struct get_conf *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700615{
616 unsigned long loop = HZ / 2;
617 int z;
618 unsigned short *p;
619
620 if (!request_region(base, 9, "eata_pio"))
621 return 0;
622
623 memset(buf, 0, sizeof(struct get_conf));
624
625 while (inb(base + HA_RSTATUS) & HA_SBUSY)
626 if (--loop == 0)
627 goto fail;
628
Alan Cox1a68d412006-09-18 19:18:34 +0100629 DBG(DBG_PIO && DBG_PROBE, printk(KERN_DEBUG "Issuing PIO READ CONFIG to HBA at %#lx\n", base));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700630 eata_pio_send_command(base, EATA_CMD_PIO_READ_CONFIG);
631
Alan Cox1a68d412006-09-18 19:18:34 +0100632 loop = 50;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700633 for (p = (unsigned short *) buf; (long) p <= ((long) buf + (sizeof(struct get_conf) / 2)); p++) {
634 while (!(inb(base + HA_RSTATUS) & HA_SDRQ))
635 if (--loop == 0)
636 goto fail;
637
Alan Cox1a68d412006-09-18 19:18:34 +0100638 loop = 50;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700639 *p = inw(base + HA_RDATA);
640 }
641 if (inb(base + HA_RSTATUS) & HA_SERROR) {
642 DBG(DBG_PROBE, printk("eata_dma: get_conf_PIO, error during "
Alan Cox1a68d412006-09-18 19:18:34 +0100643 "transfer for HBA at %lx\n", base));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700644 goto fail;
645 }
646
Alan Cox1a68d412006-09-18 19:18:34 +0100647 if (cpu_to_be32(EATA_SIGNATURE) != buf->signature)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700648 goto fail;
649
650 DBG(DBG_PIO && DBG_PROBE, printk(KERN_NOTICE "EATA Controller found "
Alan Cox1a68d412006-09-18 19:18:34 +0100651 "at %#4lx EATA Level: %x\n",
652 base, (unsigned int) (buf->version)));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700653
654 while (inb(base + HA_RSTATUS) & HA_SDRQ)
655 inw(base + HA_RDATA);
656
657 if (!ALLOW_DMA_BOARDS) {
658 for (z = 0; z < MAXISA; z++)
659 if (base == ISAbases[z]) {
660 buf->IRQ = ISAirqs[z];
661 break;
662 }
663 }
664
665 return 1;
666
667 fail:
668 release_region(base, 9);
669 return 0;
670}
671
672static void print_pio_config(struct get_conf *gc)
673{
674 printk("Please check values: (read config data)\n");
Alan Cox1a68d412006-09-18 19:18:34 +0100675 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);
676 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);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700677 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);
678}
679
Alan Cox1a68d412006-09-18 19:18:34 +0100680static unsigned int print_selftest(unsigned int base)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700681{
682 unsigned char buffer[512];
683#ifdef VERBOSE_SETUP
684 int z;
685#endif
686
687 printk("eata_pio: executing controller self test & setup...\n");
688 while (inb(base + HA_RSTATUS) & HA_SBUSY);
689 outb(EATA_CMD_PIO_SETUPTEST, base + HA_WCOMMAND);
690 do {
691 while (inb(base + HA_RSTATUS) & HA_SBUSY)
692 /* nothing */ ;
693 if (inb(base + HA_RSTATUS) & HA_SDRQ) {
694 insw(base + HA_RDATA, &buffer, 256);
695#ifdef VERBOSE_SETUP
696 /* no beeps please... */
697 for (z = 0; z < 511 && buffer[z]; z++)
698 if (buffer[z] != 7)
699 printk("%c", buffer[z]);
700#endif
701 }
702 } while (inb(base + HA_RSTATUS) & (HA_SBUSY | HA_SDRQ));
703
704 return (!(inb(base + HA_RSTATUS) & HA_SERROR));
705}
706
Alan Cox1a68d412006-09-18 19:18:34 +0100707static int register_pio_HBA(long base, struct get_conf *gc, struct pci_dev *pdev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700708{
709 unsigned long size = 0;
710 char *buff;
711 unsigned long cplen;
712 unsigned short cppadlen;
713 struct Scsi_Host *sh;
714 hostdata *hd;
715
716 DBG(DBG_REGISTER, print_pio_config(gc));
717
718 if (gc->DMA_support) {
719 printk("HBA at %#.4lx supports DMA. Please use EATA-DMA driver.\n", base);
720 if (!ALLOW_DMA_BOARDS)
721 return 0;
722 }
723
Alan Cox1a68d412006-09-18 19:18:34 +0100724 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) {
725 printk("HBA at %#lx didn't react on INQUIRY. Sorry.\n", base);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700726 return 0;
727 }
728
729 if (!print_selftest(base) && !ALLOW_DMA_BOARDS) {
Alan Cox1a68d412006-09-18 19:18:34 +0100730 printk("HBA at %#lx failed while performing self test & setup.\n", base);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700731 return 0;
732 }
733
Alan Cox1a68d412006-09-18 19:18:34 +0100734 size = sizeof(hostdata) + (sizeof(struct eata_ccb) * be16_to_cpu(gc->queuesiz));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700735
736 sh = scsi_register(&driver_template, size);
737 if (sh == NULL)
738 return 0;
739
740 if (!reg_IRQ[gc->IRQ]) { /* Interrupt already registered ? */
Thomas Gleixner1d6f3592006-07-01 19:29:42 -0700741 if (!request_irq(gc->IRQ, do_eata_pio_int_handler, IRQF_DISABLED, "EATA-PIO", sh)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700742 reg_IRQ[gc->IRQ]++;
743 if (!gc->IRQ_TR)
744 reg_IRQL[gc->IRQ] = 1; /* IRQ is edge triggered */
745 } else {
746 printk("Couldn't allocate IRQ %d, Sorry.\n", gc->IRQ);
747 return 0;
748 }
749 } else { /* More than one HBA on this IRQ */
750 if (reg_IRQL[gc->IRQ]) {
751 printk("Can't support more than one HBA on this IRQ,\n" " if the IRQ is edge triggered. Sorry.\n");
752 return 0;
753 } else
754 reg_IRQ[gc->IRQ]++;
755 }
756
757 hd = SD(sh);
758
Alan Cox1a68d412006-09-18 19:18:34 +0100759 memset(hd->ccb, 0, (sizeof(struct eata_ccb) * be16_to_cpu(gc->queuesiz)));
760 memset(hd->reads, 0, sizeof(hd->reads));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700761
762 strlcpy(SD(sh)->vendor, &buff[8], sizeof(SD(sh)->vendor));
763 strlcpy(SD(sh)->name, &buff[16], sizeof(SD(sh)->name));
764 SD(sh)->revision[0] = buff[32];
765 SD(sh)->revision[1] = buff[33];
766 SD(sh)->revision[2] = buff[34];
767 SD(sh)->revision[3] = '.';
768 SD(sh)->revision[4] = buff[35];
769 SD(sh)->revision[5] = 0;
770
Alan Cox1a68d412006-09-18 19:18:34 +0100771 switch (be32_to_cpu(gc->len)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700772 case 0x1c:
773 SD(sh)->EATA_revision = 'a';
774 break;
775 case 0x1e:
776 SD(sh)->EATA_revision = 'b';
777 break;
778 case 0x22:
779 SD(sh)->EATA_revision = 'c';
780 break;
781 case 0x24:
782 SD(sh)->EATA_revision = 'z';
783 default:
784 SD(sh)->EATA_revision = '?';
785 }
786
Alan Cox1a68d412006-09-18 19:18:34 +0100787 if (be32_to_cpu(gc->len) >= 0x22) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700788 if (gc->is_PCI)
789 hd->bustype = IS_PCI;
790 else if (gc->is_EISA)
791 hd->bustype = IS_EISA;
792 else
793 hd->bustype = IS_ISA;
794 } else {
795 if (buff[21] == '4')
796 hd->bustype = IS_PCI;
797 else if (buff[21] == '2')
798 hd->bustype = IS_EISA;
799 else
800 hd->bustype = IS_ISA;
801 }
802
803 SD(sh)->cplen = cplen;
804 SD(sh)->cppadlen = cppadlen;
805 SD(sh)->hostid = gc->scsi_id[3];
806 SD(sh)->devflags = 1 << gc->scsi_id[3];
807 SD(sh)->moresupport = gc->MORE_support;
808 sh->unique_id = base;
809 sh->base = base;
810 sh->io_port = base;
811 sh->n_io_port = 9;
812 sh->irq = gc->IRQ;
813 sh->dma_channel = PIO;
814 sh->this_id = gc->scsi_id[3];
815 sh->can_queue = 1;
816 sh->cmd_per_lun = 1;
817 sh->sg_tablesize = SG_ALL;
818
819 hd->channel = 0;
820
Alan Cox1a68d412006-09-18 19:18:34 +0100821 hd->pdev = pci_dev_get(pdev); /* Keep a PCI reference */
822
Linus Torvalds1da177e2005-04-16 15:20:36 -0700823 sh->max_id = 8;
824 sh->max_lun = 8;
825
826 if (gc->SECOND)
827 hd->primary = 0;
828 else
829 hd->primary = 1;
830
831 sh->unchecked_isa_dma = 0; /* We can only do PIO */
832
833 hd->next = NULL; /* build a linked list of all HBAs */
834 hd->prev = last_HBA;
835 if (hd->prev != NULL)
836 SD(hd->prev)->next = sh;
837 last_HBA = sh;
838 if (first_HBA == NULL)
839 first_HBA = sh;
840 registered_HBAs++;
841 return (1);
842}
843
844static void find_pio_ISA(struct get_conf *buf)
845{
846 int i;
847
848 for (i = 0; i < MAXISA; i++) {
849 if (!ISAbases[i])
850 continue;
851 if (!get_pio_conf_PIO(ISAbases[i], buf))
852 continue;
Alan Cox1a68d412006-09-18 19:18:34 +0100853 if (!register_pio_HBA(ISAbases[i], buf, NULL))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700854 release_region(ISAbases[i], 9);
855 else
856 ISAbases[i] = 0;
857 }
858 return;
859}
860
861static void find_pio_EISA(struct get_conf *buf)
862{
863 u32 base;
864 int i;
865
866#ifdef CHECKPAL
867 u8 pal1, pal2, pal3;
868#endif
869
870 for (i = 0; i < MAXEISA; i++) {
871 if (EISAbases[i]) { /* Still a possibility ? */
872
873 base = 0x1c88 + (i * 0x1000);
874#ifdef CHECKPAL
875 pal1 = inb((u16) base - 8);
876 pal2 = inb((u16) base - 7);
877 pal3 = inb((u16) base - 6);
878
879 if (((pal1 == 0x12) && (pal2 == 0x14)) || ((pal1 == 0x38) && (pal2 == 0xa3) && (pal3 == 0x82)) || ((pal1 == 0x06) && (pal2 == 0x94) && (pal3 == 0x24))) {
880 DBG(DBG_PROBE, printk(KERN_NOTICE "EISA EATA id tags found: " "%x %x %x \n", (int) pal1, (int) pal2, (int) pal3));
881#endif
882 if (get_pio_conf_PIO(base, buf)) {
883 DBG(DBG_PROBE && DBG_EISA, print_pio_config(buf));
884 if (buf->IRQ) {
Alan Cox1a68d412006-09-18 19:18:34 +0100885 if (!register_pio_HBA(base, buf, NULL))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700886 release_region(base, 9);
887 } else {
888 printk(KERN_NOTICE "eata_dma: No valid IRQ. HBA " "removed from list\n");
889 release_region(base, 9);
890 }
891 }
892 /* Nothing found here so we take it from the list */
893 EISAbases[i] = 0;
894#ifdef CHECKPAL
895 }
896#endif
897 }
898 }
899 return;
900}
901
902static void find_pio_PCI(struct get_conf *buf)
903{
904#ifndef CONFIG_PCI
905 printk("eata_dma: kernel PCI support not enabled. Skipping scan for PCI HBAs.\n");
906#else
907 struct pci_dev *dev = NULL;
Alan Cox1a68d412006-09-18 19:18:34 +0100908 unsigned long base, x;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700909
Alan Cox1a68d412006-09-18 19:18:34 +0100910 while ((dev = pci_get_device(PCI_VENDOR_ID_DPT, PCI_DEVICE_ID_DPT, dev)) != NULL) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700911 DBG(DBG_PROBE && DBG_PCI, printk("eata_pio: find_PCI, HBA at %s\n", pci_name(dev)));
912 if (pci_enable_device(dev))
913 continue;
914 pci_set_master(dev);
915 base = pci_resource_flags(dev, 0);
916 if (base & IORESOURCE_MEM) {
917 printk("eata_pio: invalid base address of device %s\n", pci_name(dev));
918 continue;
919 }
920 base = pci_resource_start(dev, 0);
921 /* EISA tag there ? */
922 if ((inb(base) == 0x12) && (inb(base + 1) == 0x14))
923 continue; /* Jep, it's forced, so move on */
924 base += 0x10; /* Now, THIS is the real address */
925 if (base != 0x1f8) {
926 /* We didn't find it in the primary search */
927 if (get_pio_conf_PIO(base, buf)) {
928 if (buf->FORCADR) { /* If the address is forced */
929 release_region(base, 9);
930 continue; /* we'll find it later */
931 }
932
933 /* OK. We made it till here, so we can go now
934 * and register it. We only have to check and
935 * eventually remove it from the EISA and ISA list
936 */
937
Alan Cox1a68d412006-09-18 19:18:34 +0100938 if (!register_pio_HBA(base, buf, dev)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700939 release_region(base, 9);
940 continue;
941 }
942
943 if (base < 0x1000) {
944 for (x = 0; x < MAXISA; ++x) {
945 if (ISAbases[x] == base) {
946 ISAbases[x] = 0;
947 break;
948 }
949 }
950 } else if ((base & 0x0fff) == 0x0c88) {
951 x = (base >> 12) & 0x0f;
952 EISAbases[x] = 0;
953 }
954 }
955#ifdef CHECK_BLINK
956 else if (check_blink_state(base)) {
957 printk("eata_pio: HBA is in BLINK state.\n" "Consult your HBAs manual to correct this.\n");
958 }
959#endif
960 }
961 }
962#endif /* #ifndef CONFIG_PCI */
963}
964
965static int eata_pio_detect(struct scsi_host_template *tpnt)
966{
967 struct Scsi_Host *HBA_ptr;
968 struct get_conf gc;
969 int i;
970
971 find_pio_PCI(&gc);
972 find_pio_EISA(&gc);
973 find_pio_ISA(&gc);
974
975 for (i = 0; i <= MAXIRQ; i++)
976 if (reg_IRQ[i])
Thomas Gleixner1d6f3592006-07-01 19:29:42 -0700977 request_irq(i, do_eata_pio_int_handler, IRQF_DISABLED, "EATA-PIO", NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700978
979 HBA_ptr = first_HBA;
980
981 if (registered_HBAs != 0) {
982 printk("EATA (Extended Attachment) PIO driver version: %d.%d%s\n"
983 "(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);
984
985 printk("Registered HBAs:\n");
986 printk("HBA no. Boardtype: Revis: EATA: Bus: BaseIO: IRQ: Ch: ID: Pr:" " QS: SG: CPL:\n");
987 for (i = 1; i <= registered_HBAs; i++) {
Alan Cox1a68d412006-09-18 19:18:34 +0100988 printk("scsi%-2d: %.10s v%s 2.0%c %s %#.4lx %2d %d %d %c"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700989 " %2d %2d %2d\n",
990 HBA_ptr->host_no, SD(HBA_ptr)->name, SD(HBA_ptr)->revision,
991 SD(HBA_ptr)->EATA_revision, (SD(HBA_ptr)->bustype == 'P') ?
992 "PCI " : (SD(HBA_ptr)->bustype == 'E') ? "EISA" : "ISA ",
Alan Cox1a68d412006-09-18 19:18:34 +0100993 HBA_ptr->base, HBA_ptr->irq, SD(HBA_ptr)->channel, HBA_ptr->this_id,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700994 SD(HBA_ptr)->primary ? 'Y' : 'N', HBA_ptr->can_queue,
995 HBA_ptr->sg_tablesize, HBA_ptr->cmd_per_lun);
996 HBA_ptr = SD(HBA_ptr)->next;
997 }
998 }
999 return (registered_HBAs);
1000}
1001
1002static struct scsi_host_template driver_template = {
1003 .proc_name = "eata_pio",
1004 .name = "EATA (Extended Attachment) PIO driver",
1005 .proc_info = eata_pio_proc_info,
1006 .detect = eata_pio_detect,
1007 .release = eata_pio_release,
1008 .queuecommand = eata_pio_queue,
1009 .eh_abort_handler = eata_pio_abort,
1010 .eh_host_reset_handler = eata_pio_host_reset,
1011 .use_clustering = ENABLE_CLUSTERING,
1012};
1013
1014MODULE_AUTHOR("Michael Neuffer, Alfred Arnold");
1015MODULE_DESCRIPTION("EATA SCSI PIO driver");
1016MODULE_LICENSE("GPL");
1017
1018#include "scsi_module.c"