[SCSI] bnx2fc: Broadcom FCoE offload driver
[linux-2.6.git] / 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@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  */
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
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
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
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
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
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
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 pid %ld, y %d\n",
376                 cmd->serial_number, y));
377
378         cmd->scsi_done = (void *) done;
379
380         if (cmd->sc_data_direction == DMA_TO_DEVICE)
381                 cp->DataOut = 1;        /* Output mode */
382         else
383                 cp->DataIn = 0; /* Input mode  */
384
385         cp->Interpret = (cmd->device->id == hd->hostid);
386         cp->cp_datalen = cpu_to_be32(scsi_bufflen(cmd));
387         cp->Auto_Req_Sen = 0;
388         cp->cp_reqDMA = 0;
389         cp->reqlen = 0;
390
391         cp->cp_id = cmd->device->id;
392         cp->cp_lun = cmd->device->lun;
393         cp->cp_dispri = 0;
394         cp->cp_identify = 1;
395         memcpy(cp->cp_cdb, cmd->cmnd, COMMAND_SIZE(*cmd->cmnd));
396
397         cp->cp_statDMA = 0;
398
399         cp->cp_viraddr = cp;
400         cp->cmd = cmd;
401         cmd->host_scribble = (char *) &hd->ccb[y];
402
403         if (!scsi_bufflen(cmd)) {
404                 cmd->SCp.buffers_residual = 1;
405                 cmd->SCp.ptr = NULL;
406                 cmd->SCp.this_residual = 0;
407                 cmd->SCp.buffer = NULL;
408         } else {
409                 cmd->SCp.buffer = scsi_sglist(cmd);
410                 cmd->SCp.buffers_residual = scsi_sg_count(cmd);
411                 cmd->SCp.ptr = sg_virt(cmd->SCp.buffer);
412                 cmd->SCp.this_residual = cmd->SCp.buffer->length;
413         }
414         cmd->SCp.Status = (cmd->SCp.this_residual != 0);        /* TRUE as long as bytes 
415                                                                  * are to transfer */
416
417         if (eata_pio_send_command(base, EATA_CMD_PIO_SEND_CP)) {
418                 cmd->result = DID_BUS_BUSY << 16;
419                 scmd_printk(KERN_NOTICE, cmd,
420                         "eata_pio_queue pid %ld, HBA busy, "
421                         "returning DID_BUS_BUSY, done.\n", cmd->serial_number);
422                 done(cmd);
423                 cp->status = FREE;
424                 return 0;
425         }
426         /* FIXME: timeout */
427         while (!(inb(base + HA_RSTATUS) & HA_SDRQ))
428                 cpu_relax();
429         outsw(base + HA_RDATA, cp, hd->cplen);
430         outb(EATA_CMD_PIO_TRUNC, base + HA_WCOMMAND);
431         for (x = 0; x < hd->cppadlen; x++)
432                 outw(0, base + HA_RDATA);
433
434         DBG(DBG_QUEUE, scmd_printk(KERN_DEBUG, cmd,
435                 "Queued base %#.4lx pid: %ld "
436                 "slot %d irq %d\n", sh->base, cmd->serial_number, y, sh->irq));
437
438         return 0;
439 }
440
441 static DEF_SCSI_QCMD(eata_pio_queue)
442
443 static int eata_pio_abort(struct scsi_cmnd *cmd)
444 {
445         unsigned int loop = 100;
446
447         DBG(DBG_ABNORM, scmd_printk(KERN_WARNING, cmd,
448                 "eata_pio_abort called pid: %ld\n",
449                 cmd->serial_number));
450
451         while (inb(cmd->device->host->base + HA_RAUXSTAT) & HA_ABUSY)
452                 if (--loop == 0) {
453                         printk(KERN_WARNING "eata_pio: abort, timeout error.\n");
454                         return FAILED;
455                 }
456         if (CD(cmd)->status == FREE) {
457                 DBG(DBG_ABNORM, printk(KERN_WARNING "Returning: SCSI_ABORT_NOT_RUNNING\n"));
458                 return FAILED;
459         }
460         if (CD(cmd)->status == USED) {
461                 DBG(DBG_ABNORM, printk(KERN_WARNING "Returning: SCSI_ABORT_BUSY\n"));
462                 /* We want to sleep a bit more here */
463                 return FAILED;          /* SNOOZE */
464         }
465         if (CD(cmd)->status == RESET) {
466                 printk(KERN_WARNING "eata_pio: abort, command reset error.\n");
467                 return FAILED;
468         }
469         if (CD(cmd)->status == LOCKED) {
470                 DBG(DBG_ABNORM, printk(KERN_WARNING "eata_pio: abort, queue slot " "locked.\n"));
471                 return FAILED;
472         }
473         panic("eata_pio: abort: invalid slot status\n");
474 }
475
476 static int eata_pio_host_reset(struct scsi_cmnd *cmd)
477 {
478         unsigned int x, limit = 0;
479         unsigned char success = 0;
480         struct scsi_cmnd *sp;
481         struct Scsi_Host *host = cmd->device->host;
482
483         DBG(DBG_ABNORM, scmd_printk(KERN_WARNING, cmd,
484                 "eata_pio_reset called pid:%ld\n",
485                 cmd->serial_number));
486
487         spin_lock_irq(host->host_lock);
488
489         if (HD(cmd)->state == RESET) {
490                 printk(KERN_WARNING "eata_pio_reset: exit, already in reset.\n");
491                 spin_unlock_irq(host->host_lock);
492                 return FAILED;
493         }
494
495         /* force all slots to be free */
496
497         for (x = 0; x < cmd->device->host->can_queue; x++) {
498
499                 if (HD(cmd)->ccb[x].status == FREE)
500                         continue;
501
502                 sp = HD(cmd)->ccb[x].cmd;
503                 HD(cmd)->ccb[x].status = RESET;
504                 printk(KERN_WARNING "eata_pio_reset: slot %d in reset, pid %ld.\n", x, sp->serial_number);
505
506                 if (sp == NULL)
507                         panic("eata_pio_reset: slot %d, sp==NULL.\n", x);
508         }
509
510         /* hard reset the HBA  */
511         outb(EATA_CMD_RESET, cmd->device->host->base + HA_WCOMMAND);
512
513         DBG(DBG_ABNORM, printk(KERN_WARNING "eata_pio_reset: board reset done.\n"));
514         HD(cmd)->state = RESET;
515
516         spin_unlock_irq(host->host_lock);
517         msleep(3000);
518         spin_lock_irq(host->host_lock);
519
520         DBG(DBG_ABNORM, printk(KERN_WARNING "eata_pio_reset: interrupts disabled, " "loops %d.\n", limit));
521
522         for (x = 0; x < cmd->device->host->can_queue; x++) {
523
524                 /* Skip slots already set free by interrupt */
525                 if (HD(cmd)->ccb[x].status != RESET)
526                         continue;
527
528                 sp = HD(cmd)->ccb[x].cmd;
529                 sp->result = DID_RESET << 16;
530
531                 /* This mailbox is terminated */
532                 printk(KERN_WARNING "eata_pio_reset: reset ccb %d.\n", x);
533                 HD(cmd)->ccb[x].status = FREE;
534
535                 sp->scsi_done(sp);
536         }
537
538         HD(cmd)->state = 0;
539
540         spin_unlock_irq(host->host_lock);
541
542         if (success) {          /* hmmm... */
543                 DBG(DBG_ABNORM, printk(KERN_WARNING "eata_pio_reset: exit, success.\n"));
544                 return SUCCESS;
545         } else {
546                 DBG(DBG_ABNORM, printk(KERN_WARNING "eata_pio_reset: exit, wakeup.\n"));
547                 return FAILED;
548         }
549 }
550
551 static char *get_pio_board_data(unsigned long base, unsigned int irq, unsigned int id, unsigned long cplen, unsigned short cppadlen)
552 {
553         struct eata_ccb cp;
554         static char buff[256];
555         int z;
556
557         memset(&cp, 0, sizeof(struct eata_ccb));
558         memset(buff, 0, sizeof(buff));
559
560         cp.DataIn = 1;
561         cp.Interpret = 1;       /* Interpret command */
562
563         cp.cp_datalen = cpu_to_be32(254);
564         cp.cp_dataDMA = cpu_to_be32(0);
565
566         cp.cp_id = id;
567         cp.cp_lun = 0;
568
569         cp.cp_cdb[0] = INQUIRY;
570         cp.cp_cdb[1] = 0;
571         cp.cp_cdb[2] = 0;
572         cp.cp_cdb[3] = 0;
573         cp.cp_cdb[4] = 254;
574         cp.cp_cdb[5] = 0;
575
576         if (eata_pio_send_command(base, EATA_CMD_PIO_SEND_CP))
577                 return NULL;
578
579         while (!(inb(base + HA_RSTATUS) & HA_SDRQ))
580                 cpu_relax();
581
582         outsw(base + HA_RDATA, &cp, cplen);
583         outb(EATA_CMD_PIO_TRUNC, base + HA_WCOMMAND);
584         for (z = 0; z < cppadlen; z++)
585                 outw(0, base + HA_RDATA);
586
587         while (inb(base + HA_RSTATUS) & HA_SBUSY)
588                 cpu_relax();
589
590         if (inb(base + HA_RSTATUS) & HA_SERROR)
591                 return NULL;
592         else if (!(inb(base + HA_RSTATUS) & HA_SDRQ))
593                 return NULL;
594         else {
595                 insw(base + HA_RDATA, &buff, 127);
596                 while (inb(base + HA_RSTATUS) & HA_SDRQ)
597                         inw(base + HA_RDATA);
598                 return buff;
599         }
600 }
601
602 static int get_pio_conf_PIO(unsigned long base, struct get_conf *buf)
603 {
604         unsigned long loop = HZ / 2;
605         int z;
606         unsigned short *p;
607
608         if (!request_region(base, 9, "eata_pio"))
609                 return 0;
610
611         memset(buf, 0, sizeof(struct get_conf));
612
613         while (inb(base + HA_RSTATUS) & HA_SBUSY)
614                 if (--loop == 0)
615                         goto fail;
616
617         DBG(DBG_PIO && DBG_PROBE, printk(KERN_DEBUG "Issuing PIO READ CONFIG to HBA at %#lx\n", base));
618         eata_pio_send_command(base, EATA_CMD_PIO_READ_CONFIG);
619
620         loop = 50;
621         for (p = (unsigned short *) buf; (long) p <= ((long) buf + (sizeof(struct get_conf) / 2)); p++) {
622                 while (!(inb(base + HA_RSTATUS) & HA_SDRQ))
623                         if (--loop == 0)
624                                 goto fail;
625
626                 loop = 50;
627                 *p = inw(base + HA_RDATA);
628         }
629         if (inb(base + HA_RSTATUS) & HA_SERROR) {
630                 DBG(DBG_PROBE, printk("eata_dma: get_conf_PIO, error during "
631                                         "transfer for HBA at %lx\n", base));
632                 goto fail;
633         }
634
635         if (cpu_to_be32(EATA_SIGNATURE) != buf->signature)
636                 goto fail;
637
638         DBG(DBG_PIO && DBG_PROBE, printk(KERN_NOTICE "EATA Controller found "
639                                 "at %#4lx EATA Level: %x\n",
640                                 base, (unsigned int) (buf->version)));
641
642         while (inb(base + HA_RSTATUS) & HA_SDRQ)
643                 inw(base + HA_RDATA);
644
645         if (!ALLOW_DMA_BOARDS) {
646                 for (z = 0; z < MAXISA; z++)
647                         if (base == ISAbases[z]) {
648                                 buf->IRQ = ISAirqs[z];
649                                 break;
650                         }
651         }
652
653         return 1;
654
655  fail:
656         release_region(base, 9);
657         return 0;
658 }
659
660 static void print_pio_config(struct get_conf *gc)
661 {
662         printk("Please check values: (read config data)\n");
663         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);
664         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);
665         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);
666 }
667
668 static unsigned int print_selftest(unsigned int base)
669 {
670         unsigned char buffer[512];
671 #ifdef VERBOSE_SETUP
672         int z;
673 #endif
674
675         printk("eata_pio: executing controller self test & setup...\n");
676         while (inb(base + HA_RSTATUS) & HA_SBUSY);
677         outb(EATA_CMD_PIO_SETUPTEST, base + HA_WCOMMAND);
678         do {
679                 while (inb(base + HA_RSTATUS) & HA_SBUSY)
680                         /* nothing */ ;
681                 if (inb(base + HA_RSTATUS) & HA_SDRQ) {
682                         insw(base + HA_RDATA, &buffer, 256);
683 #ifdef VERBOSE_SETUP
684                         /* no beeps please... */
685                         for (z = 0; z < 511 && buffer[z]; z++)
686                                 if (buffer[z] != 7)
687                                         printk("%c", buffer[z]);
688 #endif
689                 }
690         } while (inb(base + HA_RSTATUS) & (HA_SBUSY | HA_SDRQ));
691
692         return (!(inb(base + HA_RSTATUS) & HA_SERROR));
693 }
694
695 static int register_pio_HBA(long base, struct get_conf *gc, struct pci_dev *pdev)
696 {
697         unsigned long size = 0;
698         char *buff;
699         unsigned long cplen;
700         unsigned short cppadlen;
701         struct Scsi_Host *sh;
702         hostdata *hd;
703
704         DBG(DBG_REGISTER, print_pio_config(gc));
705
706         if (gc->DMA_support) {
707                 printk("HBA at %#.4lx supports DMA. Please use EATA-DMA driver.\n", base);
708                 if (!ALLOW_DMA_BOARDS)
709                         return 0;
710         }
711
712         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) {
713                 printk("HBA at %#lx didn't react on INQUIRY. Sorry.\n", base);
714                 return 0;
715         }
716
717         if (!print_selftest(base) && !ALLOW_DMA_BOARDS) {
718                 printk("HBA at %#lx failed while performing self test & setup.\n", base);
719                 return 0;
720         }
721
722         size = sizeof(hostdata) + (sizeof(struct eata_ccb) * be16_to_cpu(gc->queuesiz));
723
724         sh = scsi_register(&driver_template, size);
725         if (sh == NULL)
726                 return 0;
727
728         if (!reg_IRQ[gc->IRQ]) {        /* Interrupt already registered ? */
729                 if (!request_irq(gc->IRQ, do_eata_pio_int_handler, IRQF_DISABLED, "EATA-PIO", sh)) {
730                         reg_IRQ[gc->IRQ]++;
731                         if (!gc->IRQ_TR)
732                                 reg_IRQL[gc->IRQ] = 1;  /* IRQ is edge triggered */
733                 } else {
734                         printk("Couldn't allocate IRQ %d, Sorry.\n", gc->IRQ);
735                         return 0;
736                 }
737         } else {                /* More than one HBA on this IRQ */
738                 if (reg_IRQL[gc->IRQ]) {
739                         printk("Can't support more than one HBA on this IRQ,\n" "  if the IRQ is edge triggered. Sorry.\n");
740                         return 0;
741                 } else
742                         reg_IRQ[gc->IRQ]++;
743         }
744
745         hd = SD(sh);
746
747         memset(hd->ccb, 0, (sizeof(struct eata_ccb) * be16_to_cpu(gc->queuesiz)));
748         memset(hd->reads, 0, sizeof(hd->reads));
749
750         strlcpy(SD(sh)->vendor, &buff[8], sizeof(SD(sh)->vendor));
751         strlcpy(SD(sh)->name, &buff[16], sizeof(SD(sh)->name));
752         SD(sh)->revision[0] = buff[32];
753         SD(sh)->revision[1] = buff[33];
754         SD(sh)->revision[2] = buff[34];
755         SD(sh)->revision[3] = '.';
756         SD(sh)->revision[4] = buff[35];
757         SD(sh)->revision[5] = 0;
758
759         switch (be32_to_cpu(gc->len)) {
760         case 0x1c:
761                 SD(sh)->EATA_revision = 'a';
762                 break;
763         case 0x1e:
764                 SD(sh)->EATA_revision = 'b';
765                 break;
766         case 0x22:
767                 SD(sh)->EATA_revision = 'c';
768                 break;
769         case 0x24:
770                 SD(sh)->EATA_revision = 'z';
771         default:
772                 SD(sh)->EATA_revision = '?';
773         }
774
775         if (be32_to_cpu(gc->len) >= 0x22) {
776                 if (gc->is_PCI)
777                         hd->bustype = IS_PCI;
778                 else if (gc->is_EISA)
779                         hd->bustype = IS_EISA;
780                 else
781                         hd->bustype = IS_ISA;
782         } else {
783                 if (buff[21] == '4')
784                         hd->bustype = IS_PCI;
785                 else if (buff[21] == '2')
786                         hd->bustype = IS_EISA;
787                 else
788                         hd->bustype = IS_ISA;
789         }
790
791         SD(sh)->cplen = cplen;
792         SD(sh)->cppadlen = cppadlen;
793         SD(sh)->hostid = gc->scsi_id[3];
794         SD(sh)->devflags = 1 << gc->scsi_id[3];
795         SD(sh)->moresupport = gc->MORE_support;
796         sh->unique_id = base;
797         sh->base = base;
798         sh->io_port = base;
799         sh->n_io_port = 9;
800         sh->irq = gc->IRQ;
801         sh->dma_channel = PIO;
802         sh->this_id = gc->scsi_id[3];
803         sh->can_queue = 1;
804         sh->cmd_per_lun = 1;
805         sh->sg_tablesize = SG_ALL;
806
807         hd->channel = 0;
808
809         hd->pdev = pci_dev_get(pdev);   /* Keep a PCI reference */
810
811         sh->max_id = 8;
812         sh->max_lun = 8;
813
814         if (gc->SECOND)
815                 hd->primary = 0;
816         else
817                 hd->primary = 1;
818
819         hd->next = NULL;        /* build a linked list of all HBAs */
820         hd->prev = last_HBA;
821         if (hd->prev != NULL)
822                 SD(hd->prev)->next = sh;
823         last_HBA = sh;
824         if (first_HBA == NULL)
825                 first_HBA = sh;
826         registered_HBAs++;
827         return (1);
828 }
829
830 static void find_pio_ISA(struct get_conf *buf)
831 {
832         int i;
833
834         for (i = 0; i < MAXISA; i++) {
835                 if (!ISAbases[i])
836                         continue;
837                 if (!get_pio_conf_PIO(ISAbases[i], buf))
838                         continue;
839                 if (!register_pio_HBA(ISAbases[i], buf, NULL))
840                         release_region(ISAbases[i], 9);
841                 else
842                         ISAbases[i] = 0;
843         }
844         return;
845 }
846
847 static void find_pio_EISA(struct get_conf *buf)
848 {
849         u32 base;
850         int i;
851
852 #ifdef CHECKPAL
853         u8 pal1, pal2, pal3;
854 #endif
855
856         for (i = 0; i < MAXEISA; i++) {
857                 if (EISAbases[i]) {     /* Still a possibility ?          */
858
859                         base = 0x1c88 + (i * 0x1000);
860 #ifdef CHECKPAL
861                         pal1 = inb((u16) base - 8);
862                         pal2 = inb((u16) base - 7);
863                         pal3 = inb((u16) base - 6);
864
865                         if (((pal1 == 0x12) && (pal2 == 0x14)) || ((pal1 == 0x38) && (pal2 == 0xa3) && (pal3 == 0x82)) || ((pal1 == 0x06) && (pal2 == 0x94) && (pal3 == 0x24))) {
866                                 DBG(DBG_PROBE, printk(KERN_NOTICE "EISA EATA id tags found: " "%x %x %x \n", (int) pal1, (int) pal2, (int) pal3));
867 #endif
868                                 if (get_pio_conf_PIO(base, buf)) {
869                                         DBG(DBG_PROBE && DBG_EISA, print_pio_config(buf));
870                                         if (buf->IRQ) {
871                                                 if (!register_pio_HBA(base, buf, NULL))
872                                                         release_region(base, 9);
873                                         } else {
874                                                 printk(KERN_NOTICE "eata_dma: No valid IRQ. HBA " "removed from list\n");
875                                                 release_region(base, 9);
876                                         }
877                                 }
878                                 /* Nothing found here so we take it from the list */
879                                 EISAbases[i] = 0;
880 #ifdef CHECKPAL
881                         }
882 #endif
883                 }
884         }
885         return;
886 }
887
888 static void find_pio_PCI(struct get_conf *buf)
889 {
890 #ifndef CONFIG_PCI
891         printk("eata_dma: kernel PCI support not enabled. Skipping scan for PCI HBAs.\n");
892 #else
893         struct pci_dev *dev = NULL;
894         unsigned long base, x;
895
896         while ((dev = pci_get_device(PCI_VENDOR_ID_DPT, PCI_DEVICE_ID_DPT, dev)) != NULL) {
897                 DBG(DBG_PROBE && DBG_PCI, printk("eata_pio: find_PCI, HBA at %s\n", pci_name(dev)));
898                 if (pci_enable_device(dev))
899                         continue;
900                 pci_set_master(dev);
901                 base = pci_resource_flags(dev, 0);
902                 if (base & IORESOURCE_MEM) {
903                         printk("eata_pio: invalid base address of device %s\n", pci_name(dev));
904                         continue;
905                 }
906                 base = pci_resource_start(dev, 0);
907                 /* EISA tag there ? */
908                 if ((inb(base) == 0x12) && (inb(base + 1) == 0x14))
909                         continue;       /* Jep, it's forced, so move on  */
910                 base += 0x10;   /* Now, THIS is the real address */
911                 if (base != 0x1f8) {
912                         /* We didn't find it in the primary search */
913                         if (get_pio_conf_PIO(base, buf)) {
914                                 if (buf->FORCADR) {     /* If the address is forced */
915                                         release_region(base, 9);
916                                         continue;       /* we'll find it later      */
917                                 }
918
919                                 /* OK. We made it till here, so we can go now  
920                                  * and register it. We  only have to check and 
921                                  * eventually remove it from the EISA and ISA list 
922                                  */
923
924                                 if (!register_pio_HBA(base, buf, dev)) {
925                                         release_region(base, 9);
926                                         continue;
927                                 }
928
929                                 if (base < 0x1000) {
930                                         for (x = 0; x < MAXISA; ++x) {
931                                                 if (ISAbases[x] == base) {
932                                                         ISAbases[x] = 0;
933                                                         break;
934                                                 }
935                                         }
936                                 } else if ((base & 0x0fff) == 0x0c88) {
937                                         x = (base >> 12) & 0x0f;
938                                         EISAbases[x] = 0;
939                                 }
940                         }
941 #ifdef CHECK_BLINK
942                         else if (check_blink_state(base)) {
943                                 printk("eata_pio: HBA is in BLINK state.\n" "Consult your HBAs manual to correct this.\n");
944                         }
945 #endif
946                 }
947         }
948 #endif                          /* #ifndef CONFIG_PCI */
949 }
950
951 static int eata_pio_detect(struct scsi_host_template *tpnt)
952 {
953         struct Scsi_Host *HBA_ptr;
954         struct get_conf gc;
955         int i;
956
957         find_pio_PCI(&gc);
958         find_pio_EISA(&gc);
959         find_pio_ISA(&gc);
960
961         for (i = 0; i <= MAXIRQ; i++)
962                 if (reg_IRQ[i])
963                         request_irq(i, do_eata_pio_int_handler, IRQF_DISABLED, "EATA-PIO", NULL);
964
965         HBA_ptr = first_HBA;
966
967         if (registered_HBAs != 0) {
968                 printk("EATA (Extended Attachment) PIO driver version: %d.%d%s\n"
969                        "(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);
970
971                 printk("Registered HBAs:\n");
972                 printk("HBA no. Boardtype: Revis: EATA: Bus: BaseIO: IRQ: Ch: ID: Pr:" " QS: SG: CPL:\n");
973                 for (i = 1; i <= registered_HBAs; i++) {
974                         printk("scsi%-2d: %.10s v%s 2.0%c  %s %#.4lx   %2d   %d   %d   %c"
975                                "  %2d  %2d  %2d\n",
976                                HBA_ptr->host_no, SD(HBA_ptr)->name, SD(HBA_ptr)->revision,
977                                SD(HBA_ptr)->EATA_revision, (SD(HBA_ptr)->bustype == 'P') ?
978                                "PCI " : (SD(HBA_ptr)->bustype == 'E') ? "EISA" : "ISA ",
979                                HBA_ptr->base, HBA_ptr->irq, SD(HBA_ptr)->channel, HBA_ptr->this_id,
980                                SD(HBA_ptr)->primary ? 'Y' : 'N', HBA_ptr->can_queue,
981                                HBA_ptr->sg_tablesize, HBA_ptr->cmd_per_lun);
982                         HBA_ptr = SD(HBA_ptr)->next;
983                 }
984         }
985         return (registered_HBAs);
986 }
987
988 static struct scsi_host_template driver_template = {
989         .proc_name              = "eata_pio",
990         .name                   = "EATA (Extended Attachment) PIO driver",
991         .proc_info              = eata_pio_proc_info,
992         .detect                 = eata_pio_detect,
993         .release                = eata_pio_release,
994         .queuecommand           = eata_pio_queue,
995         .eh_abort_handler       = eata_pio_abort,
996         .eh_host_reset_handler  = eata_pio_host_reset,
997         .use_clustering         = ENABLE_CLUSTERING,
998 };
999
1000 MODULE_AUTHOR("Michael Neuffer, Alfred Arnold");
1001 MODULE_DESCRIPTION("EATA SCSI PIO driver");
1002 MODULE_LICENSE("GPL");
1003
1004 #include "scsi_module.c"