Merge branch 'x86/alternatives' into x86/core
[linux-2.6] / drivers / scsi / eata_pio.c
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         int len = 0;
111         off_t begin = 0, pos = 0;
112
113         if (rw)
114                 return -ENOSYS;
115
116         len += sprintf(buffer+len, "EATA (Extended Attachment) PIO driver version: "
117                    "%d.%d%s\n",VER_MAJOR, VER_MINOR, VER_SUB);
118         len += sprintf(buffer + len, "queued commands:     %10ld\n"
119                    "processed interrupts:%10ld\n", queue_counter, int_counter);
120         len += sprintf(buffer + len, "\nscsi%-2d: HBA %.10s\n",
121                    shost->host_no, SD(shost)->name);
122         len += sprintf(buffer + len, "Firmware revision: v%s\n",
123                    SD(shost)->revision);
124         len += sprintf(buffer + len, "IO: PIO\n");
125         len += sprintf(buffer + len, "Base IO : %#.4x\n", (u32) shost->base);
126         len += sprintf(buffer + len, "Host Bus: %s\n",
127                    (SD(shost)->bustype == 'P')?"PCI ":
128                    (SD(shost)->bustype == 'E')?"EISA":"ISA ");
129     
130         pos = begin + len;
131     
132         if (pos < offset) {
133                 len = 0;
134                 begin = pos;
135         }
136         if (pos > offset + length)
137                 goto stop_output;
138     
139 stop_output:
140         DBG(DBG_PROC, printk("2pos: %ld offset: %ld len: %d\n", pos, offset, len));
141         *start = buffer + (offset - begin);   /* Start of wanted data */
142         len -= (offset - begin);            /* Start slop */
143         if (len > length)
144                 len = length;               /* Ending slop */
145         DBG(DBG_PROC, printk("3pos: %ld offset: %ld len: %d\n", pos, offset, len));
146     
147         return len;
148 }
149
150 static int eata_pio_release(struct Scsi_Host *sh)
151 {
152         hostdata *hd = SD(sh);
153         if (sh->irq && reg_IRQ[sh->irq] == 1)
154                 free_irq(sh->irq, NULL);
155         else
156                 reg_IRQ[sh->irq]--;
157         if (SD(sh)->channel == 0) {
158                 if (sh->io_port && sh->n_io_port)
159                         release_region(sh->io_port, sh->n_io_port);
160         }
161         /* At this point the PCI reference can go */
162         if (hd->pdev)
163                 pci_dev_put(hd->pdev);
164         return 1;
165 }
166
167 static void IncStat(struct scsi_pointer *SCp, unsigned int Increment)
168 {
169         SCp->ptr += Increment;
170         if ((SCp->this_residual -= Increment) == 0) {
171                 if ((--SCp->buffers_residual) == 0)
172                         SCp->Status = 0;
173                 else {
174                         SCp->buffer++;
175                         SCp->ptr = sg_virt(SCp->buffer);
176                         SCp->this_residual = SCp->buffer->length;
177                 }
178         }
179 }
180
181 static irqreturn_t eata_pio_int_handler(int irq, void *dev_id);
182
183 static irqreturn_t do_eata_pio_int_handler(int irq, void *dev_id)
184 {
185         unsigned long flags;
186         struct Scsi_Host *dev = dev_id;
187         irqreturn_t ret;
188
189         spin_lock_irqsave(dev->host_lock, flags);
190         ret = eata_pio_int_handler(irq, dev_id);
191         spin_unlock_irqrestore(dev->host_lock, flags);
192         return ret;
193 }
194
195 static irqreturn_t eata_pio_int_handler(int irq, void *dev_id)
196 {
197         unsigned int eata_stat = 0xfffff;
198         struct scsi_cmnd *cmd;
199         hostdata *hd;
200         struct eata_ccb *cp;
201         unsigned long base;
202         unsigned int x, z;
203         struct Scsi_Host *sh;
204         unsigned short zwickel = 0;
205         unsigned char stat, odd;
206         irqreturn_t ret = IRQ_NONE;
207
208         for (x = 1, sh = first_HBA; x <= registered_HBAs; x++, sh = SD(sh)->prev) 
209         {
210                 if (sh->irq != irq)
211                         continue;
212                 if (inb(sh->base + HA_RSTATUS) & HA_SBUSY)
213                         continue;
214
215                 int_counter++;
216                 ret = IRQ_HANDLED;
217
218                 hd = SD(sh);
219
220                 cp = &hd->ccb[0];
221                 cmd = cp->cmd;
222                 base = cmd->device->host->base;
223
224                 do {
225                         stat = inb(base + HA_RSTATUS);
226                         if (stat & HA_SDRQ) {
227                                 if (cp->DataIn) {
228                                         z = 256;
229                                         odd = 0;
230                                         while ((cmd->SCp.Status) && ((z > 0) || (odd))) {
231                                                 if (odd) {
232                                                         *(cmd->SCp.ptr) = zwickel >> 8;
233                                                         IncStat(&cmd->SCp, 1);
234                                                         odd = 0;
235                                                 }
236                                                 x = min_t(unsigned int, z, cmd->SCp.this_residual / 2);
237                                                 insw(base + HA_RDATA, cmd->SCp.ptr, x);
238                                                 z -= x;
239                                                 IncStat(&cmd->SCp, 2 * x);
240                                                 if ((z > 0) && (cmd->SCp.this_residual == 1)) {
241                                                         zwickel = inw(base + HA_RDATA);
242                                                         *(cmd->SCp.ptr) = zwickel & 0xff;
243                                                         IncStat(&cmd->SCp, 1);
244                                                         z--;
245                                                         odd = 1;
246                                                 }
247                                         }
248                                         while (z > 0) {
249                                                 zwickel = inw(base + HA_RDATA);
250                                                 z--;
251                                         }
252                                 } else {        /* cp->DataOut */
253
254                                         odd = 0;
255                                         z = 256;
256                                         while ((cmd->SCp.Status) && ((z > 0) || (odd))) {
257                                                 if (odd) {
258                                                         zwickel += *(cmd->SCp.ptr) << 8;
259                                                         IncStat(&cmd->SCp, 1);
260                                                         outw(zwickel, base + HA_RDATA);
261                                                         z--;
262                                                         odd = 0;
263                                                 }
264                                                 x = min_t(unsigned int, z, cmd->SCp.this_residual / 2);
265                                                 outsw(base + HA_RDATA, cmd->SCp.ptr, x);
266                                                 z -= x;
267                                                 IncStat(&cmd->SCp, 2 * x);
268                                                 if ((z > 0) && (cmd->SCp.this_residual == 1)) {
269                                                         zwickel = *(cmd->SCp.ptr);
270                                                         zwickel &= 0xff;
271                                                         IncStat(&cmd->SCp, 1);
272                                                         odd = 1;
273                                                 }
274                                         }
275                                         while (z > 0 || odd) {
276                                                 outw(zwickel, base + HA_RDATA);
277                                                 z--;
278                                                 odd = 0;
279                                         }
280                                 }
281                         }
282                 }
283                 while ((stat & HA_SDRQ) || ((stat & HA_SMORE) && hd->moresupport));
284
285                 /* terminate handler if HBA goes busy again, i.e. transfers
286                  * more data */
287
288                 if (stat & HA_SBUSY)
289                         break;
290
291                 /* OK, this is quite stupid, but I haven't found any correct
292                  * way to get HBA&SCSI status so far */
293
294                 if (!(inb(base + HA_RSTATUS) & HA_SERROR)) {
295                         cmd->result = (DID_OK << 16);
296                         hd->devflags |= (1 << cp->cp_id);
297                 } else if (hd->devflags & (1 << cp->cp_id))
298                         cmd->result = (DID_OK << 16) + 0x02;
299                 else
300                         cmd->result = (DID_NO_CONNECT << 16);
301
302                 if (cp->status == LOCKED) {
303                         cp->status = FREE;
304                         eata_stat = inb(base + HA_RSTATUS);
305                         printk(KERN_CRIT "eata_pio: int_handler, freeing locked " "queueslot\n");
306                         return ret;
307                 }
308 #if DBG_INTR2
309                 if (stat != 0x50)
310                         printk(KERN_DEBUG "stat: %#.2x, result: %#.8x\n", stat, cmd->result);
311 #endif
312
313                 cp->status = FREE;      /* now we can release the slot  */
314
315                 cmd->scsi_done(cmd);
316         }
317
318         return ret;
319 }
320
321 static inline unsigned int eata_pio_send_command(unsigned long base, unsigned char command)
322 {
323         unsigned int loop = 50;
324
325         while (inb(base + HA_RSTATUS) & HA_SBUSY)
326                 if (--loop == 0)
327                         return 1;
328
329         /* Enable interrupts for HBA.  It is not the best way to do it at this
330          * place, but I hope that it doesn't interfere with the IDE driver 
331          * initialization this way */
332
333         outb(HA_CTRL_8HEADS, base + HA_CTRLREG);
334
335         outb(command, base + HA_WCOMMAND);
336         return 0;
337 }
338
339 static int eata_pio_queue(struct scsi_cmnd *cmd,
340                 void (*done)(struct scsi_cmnd *))
341 {
342         unsigned int x, y;
343         unsigned long base;
344
345         hostdata *hd;
346         struct Scsi_Host *sh;
347         struct eata_ccb *cp;
348
349         queue_counter++;
350
351         hd = HD(cmd);
352         sh = cmd->device->host;
353         base = sh->base;
354
355         /* use only slot 0, as 2001 can handle only one cmd at a time */
356
357         y = x = 0;
358
359         if (hd->ccb[y].status != FREE) {
360
361                 DBG(DBG_QUEUE, printk(KERN_EMERG "can_queue %d, x %d, y %d\n", sh->can_queue, x, y));
362 #if DEBUG_EATA
363                 panic(KERN_EMERG "eata_pio: run out of queue slots cmdno:%ld " "intrno: %ld\n", queue_counter, int_counter);
364 #else
365                 panic(KERN_EMERG "eata_pio: run out of queue slots....\n");
366 #endif
367         }
368
369         cp = &hd->ccb[y];
370
371         memset(cp, 0, sizeof(struct eata_ccb));
372
373         cp->status = USED;      /* claim free slot */
374
375         DBG(DBG_QUEUE, scmd_printk(KERN_DEBUG, cmd,
376                 "eata_pio_queue pid %ld, y %d\n",
377                 cmd->serial_number, y));
378
379         cmd->scsi_done = (void *) done;
380
381         if (cmd->sc_data_direction == DMA_TO_DEVICE)
382                 cp->DataOut = 1;        /* Output mode */
383         else
384                 cp->DataIn = 0; /* Input mode  */
385
386         cp->Interpret = (cmd->device->id == hd->hostid);
387         cp->cp_datalen = cpu_to_be32(scsi_bufflen(cmd));
388         cp->Auto_Req_Sen = 0;
389         cp->cp_reqDMA = 0;
390         cp->reqlen = 0;
391
392         cp->cp_id = cmd->device->id;
393         cp->cp_lun = cmd->device->lun;
394         cp->cp_dispri = 0;
395         cp->cp_identify = 1;
396         memcpy(cp->cp_cdb, cmd->cmnd, COMMAND_SIZE(*cmd->cmnd));
397
398         cp->cp_statDMA = 0;
399
400         cp->cp_viraddr = cp;
401         cp->cmd = cmd;
402         cmd->host_scribble = (char *) &hd->ccb[y];
403
404         if (!scsi_bufflen(cmd)) {
405                 cmd->SCp.buffers_residual = 1;
406                 cmd->SCp.ptr = NULL;
407                 cmd->SCp.this_residual = 0;
408                 cmd->SCp.buffer = NULL;
409         } else {
410                 cmd->SCp.buffer = scsi_sglist(cmd);
411                 cmd->SCp.buffers_residual = scsi_sg_count(cmd);
412                 cmd->SCp.ptr = sg_virt(cmd->SCp.buffer);
413                 cmd->SCp.this_residual = cmd->SCp.buffer->length;
414         }
415         cmd->SCp.Status = (cmd->SCp.this_residual != 0);        /* TRUE as long as bytes 
416                                                                  * are to transfer */
417
418         if (eata_pio_send_command(base, EATA_CMD_PIO_SEND_CP)) {
419                 cmd->result = DID_BUS_BUSY << 16;
420                 scmd_printk(KERN_NOTICE, cmd,
421                         "eata_pio_queue pid %ld, HBA busy, "
422                         "returning DID_BUS_BUSY, done.\n", cmd->serial_number);
423                 done(cmd);
424                 cp->status = FREE;
425                 return 0;
426         }
427         /* FIXME: timeout */
428         while (!(inb(base + HA_RSTATUS) & HA_SDRQ))
429                 cpu_relax();
430         outsw(base + HA_RDATA, cp, hd->cplen);
431         outb(EATA_CMD_PIO_TRUNC, base + HA_WCOMMAND);
432         for (x = 0; x < hd->cppadlen; x++)
433                 outw(0, base + HA_RDATA);
434
435         DBG(DBG_QUEUE, scmd_printk(KERN_DEBUG, cmd,
436                 "Queued base %#.4lx pid: %ld "
437                 "slot %d irq %d\n", sh->base, cmd->serial_number, y, sh->irq));
438
439         return 0;
440 }
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: %ld\n",
448                 cmd->serial_number));
449
450         while (inb(cmd->device->host->base + HA_RAUXSTAT) & HA_ABUSY)
451                 if (--loop == 0) {
452                         printk(KERN_WARNING "eata_pio: abort, timeout error.\n");
453                         return FAILED;
454                 }
455         if (CD(cmd)->status == FREE) {
456                 DBG(DBG_ABNORM, printk(KERN_WARNING "Returning: SCSI_ABORT_NOT_RUNNING\n"));
457                 return FAILED;
458         }
459         if (CD(cmd)->status == USED) {
460                 DBG(DBG_ABNORM, printk(KERN_WARNING "Returning: SCSI_ABORT_BUSY\n"));
461                 /* We want to sleep a bit more here */
462                 return FAILED;          /* SNOOZE */
463         }
464         if (CD(cmd)->status == RESET) {
465                 printk(KERN_WARNING "eata_pio: abort, command reset error.\n");
466                 return FAILED;
467         }
468         if (CD(cmd)->status == LOCKED) {
469                 DBG(DBG_ABNORM, printk(KERN_WARNING "eata_pio: abort, queue slot " "locked.\n"));
470                 return FAILED;
471         }
472         panic("eata_pio: abort: invalid slot status\n");
473 }
474
475 static int eata_pio_host_reset(struct scsi_cmnd *cmd)
476 {
477         unsigned int x, limit = 0;
478         unsigned char success = 0;
479         struct scsi_cmnd *sp;
480         struct Scsi_Host *host = cmd->device->host;
481
482         DBG(DBG_ABNORM, scmd_printk(KERN_WARNING, cmd,
483                 "eata_pio_reset called pid:%ld\n",
484                 cmd->serial_number));
485
486         spin_lock_irq(host->host_lock);
487
488         if (HD(cmd)->state == RESET) {
489                 printk(KERN_WARNING "eata_pio_reset: exit, already in reset.\n");
490                 spin_unlock_irq(host->host_lock);
491                 return FAILED;
492         }
493
494         /* force all slots to be free */
495
496         for (x = 0; x < cmd->device->host->can_queue; x++) {
497
498                 if (HD(cmd)->ccb[x].status == FREE)
499                         continue;
500
501                 sp = HD(cmd)->ccb[x].cmd;
502                 HD(cmd)->ccb[x].status = RESET;
503                 printk(KERN_WARNING "eata_pio_reset: slot %d in reset, pid %ld.\n", x, sp->serial_number);
504
505                 if (sp == NULL)
506                         panic("eata_pio_reset: slot %d, sp==NULL.\n", x);
507         }
508
509         /* hard reset the HBA  */
510         outb(EATA_CMD_RESET, cmd->device->host->base + HA_WCOMMAND);
511
512         DBG(DBG_ABNORM, printk(KERN_WARNING "eata_pio_reset: board reset done.\n"));
513         HD(cmd)->state = RESET;
514
515         spin_unlock_irq(host->host_lock);
516         msleep(3000);
517         spin_lock_irq(host->host_lock);
518
519         DBG(DBG_ABNORM, printk(KERN_WARNING "eata_pio_reset: interrupts disabled, " "loops %d.\n", limit));
520
521         for (x = 0; x < cmd->device->host->can_queue; x++) {
522
523                 /* Skip slots already set free by interrupt */
524                 if (HD(cmd)->ccb[x].status != RESET)
525                         continue;
526
527                 sp = HD(cmd)->ccb[x].cmd;
528                 sp->result = DID_RESET << 16;
529
530                 /* This mailbox is terminated */
531                 printk(KERN_WARNING "eata_pio_reset: reset ccb %d.\n", x);
532                 HD(cmd)->ccb[x].status = FREE;
533
534                 sp->scsi_done(sp);
535         }
536
537         HD(cmd)->state = 0;
538
539         spin_unlock_irq(host->host_lock);
540
541         if (success) {          /* hmmm... */
542                 DBG(DBG_ABNORM, printk(KERN_WARNING "eata_pio_reset: exit, success.\n"));
543                 return SUCCESS;
544         } else {
545                 DBG(DBG_ABNORM, printk(KERN_WARNING "eata_pio_reset: exit, wakeup.\n"));
546                 return FAILED;
547         }
548 }
549
550 static char *get_pio_board_data(unsigned long base, unsigned int irq, unsigned int id, unsigned long cplen, unsigned short cppadlen)
551 {
552         struct eata_ccb cp;
553         static char buff[256];
554         int z;
555
556         memset(&cp, 0, sizeof(struct eata_ccb));
557         memset(buff, 0, sizeof(buff));
558
559         cp.DataIn = 1;
560         cp.Interpret = 1;       /* Interpret command */
561
562         cp.cp_datalen = cpu_to_be32(254);
563         cp.cp_dataDMA = cpu_to_be32(0);
564
565         cp.cp_id = id;
566         cp.cp_lun = 0;
567
568         cp.cp_cdb[0] = INQUIRY;
569         cp.cp_cdb[1] = 0;
570         cp.cp_cdb[2] = 0;
571         cp.cp_cdb[3] = 0;
572         cp.cp_cdb[4] = 254;
573         cp.cp_cdb[5] = 0;
574
575         if (eata_pio_send_command(base, EATA_CMD_PIO_SEND_CP))
576                 return NULL;
577
578         while (!(inb(base + HA_RSTATUS) & HA_SDRQ))
579                 cpu_relax();
580
581         outsw(base + HA_RDATA, &cp, cplen);
582         outb(EATA_CMD_PIO_TRUNC, base + HA_WCOMMAND);
583         for (z = 0; z < cppadlen; z++)
584                 outw(0, base + HA_RDATA);
585
586         while (inb(base + HA_RSTATUS) & HA_SBUSY)
587                 cpu_relax();
588
589         if (inb(base + HA_RSTATUS) & HA_SERROR)
590                 return NULL;
591         else if (!(inb(base + HA_RSTATUS) & HA_SDRQ))
592                 return NULL;
593         else {
594                 insw(base + HA_RDATA, &buff, 127);
595                 while (inb(base + HA_RSTATUS) & HA_SDRQ)
596                         inw(base + HA_RDATA);
597                 return buff;
598         }
599 }
600
601 static int get_pio_conf_PIO(unsigned long base, struct get_conf *buf)
602 {
603         unsigned long loop = HZ / 2;
604         int z;
605         unsigned short *p;
606
607         if (!request_region(base, 9, "eata_pio"))
608                 return 0;
609
610         memset(buf, 0, sizeof(struct get_conf));
611
612         while (inb(base + HA_RSTATUS) & HA_SBUSY)
613                 if (--loop == 0)
614                         goto fail;
615
616         DBG(DBG_PIO && DBG_PROBE, printk(KERN_DEBUG "Issuing PIO READ CONFIG to HBA at %#lx\n", base));
617         eata_pio_send_command(base, EATA_CMD_PIO_READ_CONFIG);
618
619         loop = 50;
620         for (p = (unsigned short *) buf; (long) p <= ((long) buf + (sizeof(struct get_conf) / 2)); p++) {
621                 while (!(inb(base + HA_RSTATUS) & HA_SDRQ))
622                         if (--loop == 0)
623                                 goto fail;
624
625                 loop = 50;
626                 *p = inw(base + HA_RDATA);
627         }
628         if (inb(base + HA_RSTATUS) & HA_SERROR) {
629                 DBG(DBG_PROBE, printk("eata_dma: get_conf_PIO, error during "
630                                         "transfer for HBA at %lx\n", base));
631                 goto fail;
632         }
633
634         if (cpu_to_be32(EATA_SIGNATURE) != buf->signature)
635                 goto fail;
636
637         DBG(DBG_PIO && DBG_PROBE, printk(KERN_NOTICE "EATA Controller found "
638                                 "at %#4lx EATA Level: %x\n",
639                                 base, (unsigned int) (buf->version)));
640
641         while (inb(base + HA_RSTATUS) & HA_SDRQ)
642                 inw(base + HA_RDATA);
643
644         if (!ALLOW_DMA_BOARDS) {
645                 for (z = 0; z < MAXISA; z++)
646                         if (base == ISAbases[z]) {
647                                 buf->IRQ = ISAirqs[z];
648                                 break;
649                         }
650         }
651
652         return 1;
653
654  fail:
655         release_region(base, 9);
656         return 0;
657 }
658
659 static void print_pio_config(struct get_conf *gc)
660 {
661         printk("Please check values: (read config data)\n");
662         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);
663         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);
664         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);
665 }
666
667 static unsigned int print_selftest(unsigned int base)
668 {
669         unsigned char buffer[512];
670 #ifdef VERBOSE_SETUP
671         int z;
672 #endif
673
674         printk("eata_pio: executing controller self test & setup...\n");
675         while (inb(base + HA_RSTATUS) & HA_SBUSY);
676         outb(EATA_CMD_PIO_SETUPTEST, base + HA_WCOMMAND);
677         do {
678                 while (inb(base + HA_RSTATUS) & HA_SBUSY)
679                         /* nothing */ ;
680                 if (inb(base + HA_RSTATUS) & HA_SDRQ) {
681                         insw(base + HA_RDATA, &buffer, 256);
682 #ifdef VERBOSE_SETUP
683                         /* no beeps please... */
684                         for (z = 0; z < 511 && buffer[z]; z++)
685                                 if (buffer[z] != 7)
686                                         printk("%c", buffer[z]);
687 #endif
688                 }
689         } while (inb(base + HA_RSTATUS) & (HA_SBUSY | HA_SDRQ));
690
691         return (!(inb(base + HA_RSTATUS) & HA_SERROR));
692 }
693
694 static int register_pio_HBA(long base, struct get_conf *gc, struct pci_dev *pdev)
695 {
696         unsigned long size = 0;
697         char *buff;
698         unsigned long cplen;
699         unsigned short cppadlen;
700         struct Scsi_Host *sh;
701         hostdata *hd;
702
703         DBG(DBG_REGISTER, print_pio_config(gc));
704
705         if (gc->DMA_support) {
706                 printk("HBA at %#.4lx supports DMA. Please use EATA-DMA driver.\n", base);
707                 if (!ALLOW_DMA_BOARDS)
708                         return 0;
709         }
710
711         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) {
712                 printk("HBA at %#lx didn't react on INQUIRY. Sorry.\n", base);
713                 return 0;
714         }
715
716         if (!print_selftest(base) && !ALLOW_DMA_BOARDS) {
717                 printk("HBA at %#lx failed while performing self test & setup.\n", base);
718                 return 0;
719         }
720
721         size = sizeof(hostdata) + (sizeof(struct eata_ccb) * be16_to_cpu(gc->queuesiz));
722
723         sh = scsi_register(&driver_template, size);
724         if (sh == NULL)
725                 return 0;
726
727         if (!reg_IRQ[gc->IRQ]) {        /* Interrupt already registered ? */
728                 if (!request_irq(gc->IRQ, do_eata_pio_int_handler, IRQF_DISABLED, "EATA-PIO", sh)) {
729                         reg_IRQ[gc->IRQ]++;
730                         if (!gc->IRQ_TR)
731                                 reg_IRQL[gc->IRQ] = 1;  /* IRQ is edge triggered */
732                 } else {
733                         printk("Couldn't allocate IRQ %d, Sorry.\n", gc->IRQ);
734                         return 0;
735                 }
736         } else {                /* More than one HBA on this IRQ */
737                 if (reg_IRQL[gc->IRQ]) {
738                         printk("Can't support more than one HBA on this IRQ,\n" "  if the IRQ is edge triggered. Sorry.\n");
739                         return 0;
740                 } else
741                         reg_IRQ[gc->IRQ]++;
742         }
743
744         hd = SD(sh);
745
746         memset(hd->ccb, 0, (sizeof(struct eata_ccb) * be16_to_cpu(gc->queuesiz)));
747         memset(hd->reads, 0, sizeof(hd->reads));
748
749         strlcpy(SD(sh)->vendor, &buff[8], sizeof(SD(sh)->vendor));
750         strlcpy(SD(sh)->name, &buff[16], sizeof(SD(sh)->name));
751         SD(sh)->revision[0] = buff[32];
752         SD(sh)->revision[1] = buff[33];
753         SD(sh)->revision[2] = buff[34];
754         SD(sh)->revision[3] = '.';
755         SD(sh)->revision[4] = buff[35];
756         SD(sh)->revision[5] = 0;
757
758         switch (be32_to_cpu(gc->len)) {
759         case 0x1c:
760                 SD(sh)->EATA_revision = 'a';
761                 break;
762         case 0x1e:
763                 SD(sh)->EATA_revision = 'b';
764                 break;
765         case 0x22:
766                 SD(sh)->EATA_revision = 'c';
767                 break;
768         case 0x24:
769                 SD(sh)->EATA_revision = 'z';
770         default:
771                 SD(sh)->EATA_revision = '?';
772         }
773
774         if (be32_to_cpu(gc->len) >= 0x22) {
775                 if (gc->is_PCI)
776                         hd->bustype = IS_PCI;
777                 else if (gc->is_EISA)
778                         hd->bustype = IS_EISA;
779                 else
780                         hd->bustype = IS_ISA;
781         } else {
782                 if (buff[21] == '4')
783                         hd->bustype = IS_PCI;
784                 else if (buff[21] == '2')
785                         hd->bustype = IS_EISA;
786                 else
787                         hd->bustype = IS_ISA;
788         }
789
790         SD(sh)->cplen = cplen;
791         SD(sh)->cppadlen = cppadlen;
792         SD(sh)->hostid = gc->scsi_id[3];
793         SD(sh)->devflags = 1 << gc->scsi_id[3];
794         SD(sh)->moresupport = gc->MORE_support;
795         sh->unique_id = base;
796         sh->base = base;
797         sh->io_port = base;
798         sh->n_io_port = 9;
799         sh->irq = gc->IRQ;
800         sh->dma_channel = PIO;
801         sh->this_id = gc->scsi_id[3];
802         sh->can_queue = 1;
803         sh->cmd_per_lun = 1;
804         sh->sg_tablesize = SG_ALL;
805
806         hd->channel = 0;
807
808         hd->pdev = pci_dev_get(pdev);   /* Keep a PCI reference */
809
810         sh->max_id = 8;
811         sh->max_lun = 8;
812
813         if (gc->SECOND)
814                 hd->primary = 0;
815         else
816                 hd->primary = 1;
817
818         hd->next = NULL;        /* build a linked list of all HBAs */
819         hd->prev = last_HBA;
820         if (hd->prev != NULL)
821                 SD(hd->prev)->next = sh;
822         last_HBA = sh;
823         if (first_HBA == NULL)
824                 first_HBA = sh;
825         registered_HBAs++;
826         return (1);
827 }
828
829 static void find_pio_ISA(struct get_conf *buf)
830 {
831         int i;
832
833         for (i = 0; i < MAXISA; i++) {
834                 if (!ISAbases[i])
835                         continue;
836                 if (!get_pio_conf_PIO(ISAbases[i], buf))
837                         continue;
838                 if (!register_pio_HBA(ISAbases[i], buf, NULL))
839                         release_region(ISAbases[i], 9);
840                 else
841                         ISAbases[i] = 0;
842         }
843         return;
844 }
845
846 static void find_pio_EISA(struct get_conf *buf)
847 {
848         u32 base;
849         int i;
850
851 #ifdef CHECKPAL
852         u8 pal1, pal2, pal3;
853 #endif
854
855         for (i = 0; i < MAXEISA; i++) {
856                 if (EISAbases[i]) {     /* Still a possibility ?          */
857
858                         base = 0x1c88 + (i * 0x1000);
859 #ifdef CHECKPAL
860                         pal1 = inb((u16) base - 8);
861                         pal2 = inb((u16) base - 7);
862                         pal3 = inb((u16) base - 6);
863
864                         if (((pal1 == 0x12) && (pal2 == 0x14)) || ((pal1 == 0x38) && (pal2 == 0xa3) && (pal3 == 0x82)) || ((pal1 == 0x06) && (pal2 == 0x94) && (pal3 == 0x24))) {
865                                 DBG(DBG_PROBE, printk(KERN_NOTICE "EISA EATA id tags found: " "%x %x %x \n", (int) pal1, (int) pal2, (int) pal3));
866 #endif
867                                 if (get_pio_conf_PIO(base, buf)) {
868                                         DBG(DBG_PROBE && DBG_EISA, print_pio_config(buf));
869                                         if (buf->IRQ) {
870                                                 if (!register_pio_HBA(base, buf, NULL))
871                                                         release_region(base, 9);
872                                         } else {
873                                                 printk(KERN_NOTICE "eata_dma: No valid IRQ. HBA " "removed from list\n");
874                                                 release_region(base, 9);
875                                         }
876                                 }
877                                 /* Nothing found here so we take it from the list */
878                                 EISAbases[i] = 0;
879 #ifdef CHECKPAL
880                         }
881 #endif
882                 }
883         }
884         return;
885 }
886
887 static void find_pio_PCI(struct get_conf *buf)
888 {
889 #ifndef CONFIG_PCI
890         printk("eata_dma: kernel PCI support not enabled. Skipping scan for PCI HBAs.\n");
891 #else
892         struct pci_dev *dev = NULL;
893         unsigned long base, x;
894
895         while ((dev = pci_get_device(PCI_VENDOR_ID_DPT, PCI_DEVICE_ID_DPT, dev)) != NULL) {
896                 DBG(DBG_PROBE && DBG_PCI, printk("eata_pio: find_PCI, HBA at %s\n", pci_name(dev)));
897                 if (pci_enable_device(dev))
898                         continue;
899                 pci_set_master(dev);
900                 base = pci_resource_flags(dev, 0);
901                 if (base & IORESOURCE_MEM) {
902                         printk("eata_pio: invalid base address of device %s\n", pci_name(dev));
903                         continue;
904                 }
905                 base = pci_resource_start(dev, 0);
906                 /* EISA tag there ? */
907                 if ((inb(base) == 0x12) && (inb(base + 1) == 0x14))
908                         continue;       /* Jep, it's forced, so move on  */
909                 base += 0x10;   /* Now, THIS is the real address */
910                 if (base != 0x1f8) {
911                         /* We didn't find it in the primary search */
912                         if (get_pio_conf_PIO(base, buf)) {
913                                 if (buf->FORCADR) {     /* If the address is forced */
914                                         release_region(base, 9);
915                                         continue;       /* we'll find it later      */
916                                 }
917
918                                 /* OK. We made it till here, so we can go now  
919                                  * and register it. We  only have to check and 
920                                  * eventually remove it from the EISA and ISA list 
921                                  */
922
923                                 if (!register_pio_HBA(base, buf, dev)) {
924                                         release_region(base, 9);
925                                         continue;
926                                 }
927
928                                 if (base < 0x1000) {
929                                         for (x = 0; x < MAXISA; ++x) {
930                                                 if (ISAbases[x] == base) {
931                                                         ISAbases[x] = 0;
932                                                         break;
933                                                 }
934                                         }
935                                 } else if ((base & 0x0fff) == 0x0c88) {
936                                         x = (base >> 12) & 0x0f;
937                                         EISAbases[x] = 0;
938                                 }
939                         }
940 #ifdef CHECK_BLINK
941                         else if (check_blink_state(base)) {
942                                 printk("eata_pio: HBA is in BLINK state.\n" "Consult your HBAs manual to correct this.\n");
943                         }
944 #endif
945                 }
946         }
947 #endif                          /* #ifndef CONFIG_PCI */
948 }
949
950 static int eata_pio_detect(struct scsi_host_template *tpnt)
951 {
952         struct Scsi_Host *HBA_ptr;
953         struct get_conf gc;
954         int i;
955
956         find_pio_PCI(&gc);
957         find_pio_EISA(&gc);
958         find_pio_ISA(&gc);
959
960         for (i = 0; i <= MAXIRQ; i++)
961                 if (reg_IRQ[i])
962                         request_irq(i, do_eata_pio_int_handler, IRQF_DISABLED, "EATA-PIO", NULL);
963
964         HBA_ptr = first_HBA;
965
966         if (registered_HBAs != 0) {
967                 printk("EATA (Extended Attachment) PIO driver version: %d.%d%s\n"
968                        "(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);
969
970                 printk("Registered HBAs:\n");
971                 printk("HBA no. Boardtype: Revis: EATA: Bus: BaseIO: IRQ: Ch: ID: Pr:" " QS: SG: CPL:\n");
972                 for (i = 1; i <= registered_HBAs; i++) {
973                         printk("scsi%-2d: %.10s v%s 2.0%c  %s %#.4lx   %2d   %d   %d   %c"
974                                "  %2d  %2d  %2d\n",
975                                HBA_ptr->host_no, SD(HBA_ptr)->name, SD(HBA_ptr)->revision,
976                                SD(HBA_ptr)->EATA_revision, (SD(HBA_ptr)->bustype == 'P') ?
977                                "PCI " : (SD(HBA_ptr)->bustype == 'E') ? "EISA" : "ISA ",
978                                HBA_ptr->base, HBA_ptr->irq, SD(HBA_ptr)->channel, HBA_ptr->this_id,
979                                SD(HBA_ptr)->primary ? 'Y' : 'N', HBA_ptr->can_queue,
980                                HBA_ptr->sg_tablesize, HBA_ptr->cmd_per_lun);
981                         HBA_ptr = SD(HBA_ptr)->next;
982                 }
983         }
984         return (registered_HBAs);
985 }
986
987 static struct scsi_host_template driver_template = {
988         .proc_name              = "eata_pio",
989         .name                   = "EATA (Extended Attachment) PIO driver",
990         .proc_info              = eata_pio_proc_info,
991         .detect                 = eata_pio_detect,
992         .release                = eata_pio_release,
993         .queuecommand           = eata_pio_queue,
994         .eh_abort_handler       = eata_pio_abort,
995         .eh_host_reset_handler  = eata_pio_host_reset,
996         .use_clustering         = ENABLE_CLUSTERING,
997 };
998
999 MODULE_AUTHOR("Michael Neuffer, Alfred Arnold");
1000 MODULE_DESCRIPTION("EATA SCSI PIO driver");
1001 MODULE_LICENSE("GPL");
1002
1003 #include "scsi_module.c"