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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/config.h>
50 #include <linux/module.h>
51 #include <linux/kernel.h>
52 #include <linux/sched.h>
53 #include <linux/string.h>
54 #include <linux/ioport.h>
55 #include <linux/slab.h>
56 #include <linux/in.h>
57 #include <linux/pci.h>
58 #include <linux/proc_fs.h>
59 #include <linux/interrupt.h>
60 #include <linux/blkdev.h>
61 #include <linux/spinlock.h>
62 #include <linux/delay.h>
63
64 #include <asm/io.h>
65
66 #include <scsi/scsi.h>
67 #include <scsi/scsi_cmnd.h>
68 #include <scsi/scsi_device.h>
69 #include <scsi/scsi_host.h>
70
71 #include "eata_generic.h"
72 #include "eata_pio.h"
73
74
75 static uint ISAbases[MAXISA] =  {
76          0x1F0, 0x170, 0x330, 0x230
77 };
78
79 static uint ISAirqs[MAXISA] = {
80         14, 12, 15, 11
81 };
82
83 static unsigned char EISAbases[] = { 
84         1, 1, 1, 1, 1, 1, 1, 1,
85         1, 1, 1, 1, 1, 1, 1, 1 
86 };
87
88 static uint registered_HBAs;
89 static struct Scsi_Host *last_HBA;
90 static struct Scsi_Host *first_HBA;
91 static unsigned char reg_IRQ[16];
92 static unsigned char reg_IRQL[16];
93 static unsigned long int_counter;
94 static unsigned long queue_counter;
95
96 static struct scsi_host_template driver_template;
97
98 /*
99  * eata_proc_info
100  * inout : decides on the direction of the dataflow and the meaning of the 
101  *         variables
102  * buffer: If inout==FALSE data is being written to it else read from it
103  * *start: If inout==FALSE start of the valid data in the buffer
104  * offset: If inout==FALSE offset from the beginning of the imaginary file 
105  *         from which we start writing into the buffer
106  * length: If inout==FALSE max number of bytes to be written into the buffer 
107  *         else number of bytes in the buffer
108  */
109 static int eata_pio_proc_info(struct Scsi_Host *shost, char *buffer, char **start, off_t offset,
110                               int length, int rw)
111 {
112     static u8 buff[512];
113     int size, len = 0;
114     off_t begin = 0, pos = 0;
115
116     if (rw)
117         return -ENOSYS;
118     if (offset == 0)
119         memset(buff, 0, sizeof(buff));
120
121     size = sprintf(buffer+len, "EATA (Extended Attachment) PIO driver version: "
122                    "%d.%d%s\n",VER_MAJOR, VER_MINOR, VER_SUB);
123     len += size; pos = begin + len;
124     size = sprintf(buffer + len, "queued commands:     %10ld\n"
125                    "processed interrupts:%10ld\n", queue_counter, int_counter);
126     len += size; pos = begin + len;
127     
128     size = sprintf(buffer + len, "\nscsi%-2d: HBA %.10s\n",
129                    shost->host_no, SD(shost)->name);
130     len += size; 
131     pos = begin + len;
132     size = sprintf(buffer + len, "Firmware revision: v%s\n", 
133                    SD(shost)->revision);
134     len += size;
135     pos = begin + len;
136     size = sprintf(buffer + len, "IO: PIO\n");
137     len += size; 
138     pos = begin + len;
139     size = sprintf(buffer + len, "Base IO : %#.4x\n", (u32) shost->base);
140     len += size; 
141     pos = begin + len;
142     size = sprintf(buffer + len, "Host Bus: %s\n", 
143                    (SD(shost)->bustype == 'P')?"PCI ":
144                    (SD(shost)->bustype == 'E')?"EISA":"ISA ");
145     
146     len += size; 
147     pos = begin + len;
148     
149     if (pos < offset) {
150         len = 0;
151         begin = pos;
152     }
153     if (pos > offset + length)
154         goto stop_output;
155     
156  stop_output:
157     DBG(DBG_PROC, printk("2pos: %ld offset: %ld len: %d\n", pos, offset, len));
158     *start=buffer+(offset-begin);   /* Start of wanted data */
159     len-=(offset-begin);            /* Start slop */
160     if(len>length)
161         len = length;               /* Ending slop */
162     DBG(DBG_PROC, printk("3pos: %ld offset: %ld len: %d\n", pos, offset, len));
163     
164     return (len);     
165 }
166
167 static int eata_pio_release(struct Scsi_Host *sh)
168 {
169         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         }
177         return 1;
178 }
179
180 static void IncStat(struct scsi_pointer *SCp, uint Increment)
181 {
182         SCp->ptr += Increment;
183         if ((SCp->this_residual -= Increment) == 0) {
184                 if ((--SCp->buffers_residual) == 0)
185                         SCp->Status = 0;
186                 else {
187                         SCp->buffer++;
188                         SCp->ptr = page_address(SCp->buffer->page) + SCp->buffer->offset;
189                         SCp->this_residual = SCp->buffer->length;
190                 }
191         }
192 }
193
194 static void eata_pio_int_handler(int irq, void *dev_id, struct pt_regs *regs);
195
196 static irqreturn_t do_eata_pio_int_handler(int irq, void *dev_id,
197                                                 struct pt_regs *regs)
198 {
199         unsigned long flags;
200         struct Scsi_Host *dev = dev_id;
201
202         spin_lock_irqsave(dev->host_lock, flags);
203         eata_pio_int_handler(irq, dev_id, regs);
204         spin_unlock_irqrestore(dev->host_lock, flags);
205         return IRQ_HANDLED;
206 }
207
208 static void eata_pio_int_handler(int irq, void *dev_id, struct pt_regs *regs)
209 {
210         uint eata_stat = 0xfffff;
211         struct scsi_cmnd *cmd;
212         hostdata *hd;
213         struct eata_ccb *cp;
214         uint base;
215         uint x, z;
216         struct Scsi_Host *sh;
217         unsigned short zwickel = 0;
218         unsigned char stat, odd;
219
220         for (x = 1, sh = first_HBA; x <= registered_HBAs; x++, sh = SD(sh)->prev) 
221         {
222                 if (sh->irq != irq)
223                         continue;
224                 if (inb((uint) sh->base + HA_RSTATUS) & HA_SBUSY)
225                         continue;
226
227                 int_counter++;
228
229                 hd = SD(sh);
230
231                 cp = &hd->ccb[0];
232                 cmd = cp->cmd;
233                 base = (uint) cmd->device->host->base;
234
235                 do {
236                         stat = inb(base + HA_RSTATUS);
237                         if (stat & HA_SDRQ) {
238                                 if (cp->DataIn) {
239                                         z = 256;
240                                         odd = 0;
241                                         while ((cmd->SCp.Status) && ((z > 0) || (odd))) {
242                                                 if (odd) {
243                                                         *(cmd->SCp.ptr) = zwickel >> 8;
244                                                         IncStat(&cmd->SCp, 1);
245                                                         odd = 0;
246                                                 }
247                                                 x = min_t(unsigned int, z, cmd->SCp.this_residual / 2);
248                                                 insw(base + HA_RDATA, cmd->SCp.ptr, x);
249                                                 z -= x;
250                                                 IncStat(&cmd->SCp, 2 * x);
251                                                 if ((z > 0) && (cmd->SCp.this_residual == 1)) {
252                                                         zwickel = inw(base + HA_RDATA);
253                                                         *(cmd->SCp.ptr) = zwickel & 0xff;
254                                                         IncStat(&cmd->SCp, 1);
255                                                         z--;
256                                                         odd = 1;
257                                                 }
258                                         }
259                                         while (z > 0) {
260                                                 zwickel = inw(base + HA_RDATA);
261                                                 z--;
262                                         }
263                                 } else {        /* cp->DataOut */
264
265                                         odd = 0;
266                                         z = 256;
267                                         while ((cmd->SCp.Status) && ((z > 0) || (odd))) {
268                                                 if (odd) {
269                                                         zwickel += *(cmd->SCp.ptr) << 8;
270                                                         IncStat(&cmd->SCp, 1);
271                                                         outw(zwickel, base + HA_RDATA);
272                                                         z--;
273                                                         odd = 0;
274                                                 }
275                                                 x = min_t(unsigned int, z, cmd->SCp.this_residual / 2);
276                                                 outsw(base + HA_RDATA, cmd->SCp.ptr, x);
277                                                 z -= x;
278                                                 IncStat(&cmd->SCp, 2 * x);
279                                                 if ((z > 0) && (cmd->SCp.this_residual == 1)) {
280                                                         zwickel = *(cmd->SCp.ptr);
281                                                         zwickel &= 0xff;
282                                                         IncStat(&cmd->SCp, 1);
283                                                         odd = 1;
284                                                 }
285                                         }
286                                         while (z > 0 || odd) {
287                                                 outw(zwickel, base + HA_RDATA);
288                                                 z--;
289                                                 odd = 0;
290                                         }
291                                 }
292                         }
293                 }
294                 while ((stat & HA_SDRQ) || ((stat & HA_SMORE) && hd->moresupport));
295
296                 /* terminate handler if HBA goes busy again, i.e. transfers
297                  * more data */
298
299                 if (stat & HA_SBUSY)
300                         break;
301
302                 /* OK, this is quite stupid, but I haven't found any correct
303                  * way to get HBA&SCSI status so far */
304
305                 if (!(inb(base + HA_RSTATUS) & HA_SERROR)) {
306                         cmd->result = (DID_OK << 16);
307                         hd->devflags |= (1 << cp->cp_id);
308                 } else if (hd->devflags & 1 << cp->cp_id)
309                         cmd->result = (DID_OK << 16) + 0x02;
310                 else
311                         cmd->result = (DID_NO_CONNECT << 16);
312
313                 if (cp->status == LOCKED) {
314                         cp->status = FREE;
315                         eata_stat = inb(base + HA_RSTATUS);
316                         printk(KERN_CRIT "eata_pio: int_handler, freeing locked " "queueslot\n");
317                         return;
318                 }
319 #if DBG_INTR2
320                 if (stat != 0x50)
321                         printk(KERN_DEBUG "stat: %#.2x, result: %#.8x\n", stat, cmd->result);
322 #endif
323
324                 cp->status = FREE;      /* now we can release the slot  */
325
326                 cmd->scsi_done(cmd);
327         }
328
329         return;
330 }
331
332 static inline uint eata_pio_send_command(uint base, unsigned char command)
333 {
334         uint loop = HZ / 2;
335
336         while (inb(base + HA_RSTATUS) & HA_SBUSY)
337                 if (--loop == 0)
338                         return 1;
339
340         /* Enable interrupts for HBA.  It is not the best way to do it at this
341          * place, but I hope that it doesn't interfere with the IDE driver 
342          * initialization this way */
343
344         outb(HA_CTRL_8HEADS, base + HA_CTRLREG);
345
346         outb(command, base + HA_WCOMMAND);
347         return 0;
348 }
349
350 static int eata_pio_queue(struct scsi_cmnd *cmd,
351                 void (*done)(struct scsi_cmnd *))
352 {
353         uint x, y;
354         uint base;
355
356         hostdata *hd;
357         struct Scsi_Host *sh;
358         struct eata_ccb *cp;
359
360         queue_counter++;
361
362         hd = HD(cmd);
363         sh = cmd->device->host;
364         base = (uint) sh->base;
365
366         /* use only slot 0, as 2001 can handle only one cmd at a time */
367
368         y = x = 0;
369
370         if (hd->ccb[y].status != FREE) {
371
372                 DBG(DBG_QUEUE, printk(KERN_EMERG "can_queue %d, x %d, y %d\n", sh->can_queue, x, y));
373 #if DEBUG_EATA
374                 panic(KERN_EMERG "eata_pio: run out of queue slots cmdno:%ld " "intrno: %ld\n", queue_counter, int_counter);
375 #else
376                 panic(KERN_EMERG "eata_pio: run out of queue slots....\n");
377 #endif
378         }
379
380         cp = &hd->ccb[y];
381
382         memset(cp, 0, sizeof(struct eata_ccb));
383         memset(cmd->sense_buffer, 0, sizeof(cmd->sense_buffer));
384
385         cp->status = USED;      /* claim free slot */
386
387         DBG(DBG_QUEUE, printk(KERN_DEBUG "eata_pio_queue pid %ld, target: %x, lun:" " %x, y %d\n", cmd->pid, cmd->device->id, cmd->device->lun, y));
388
389         cmd->scsi_done = (void *) done;
390
391         if (cmd->sc_data_direction == DMA_TO_DEVICE)
392                 cp->DataOut = 1;        /* Output mode */
393         else
394                 cp->DataIn = 0; /* Input mode  */
395
396         cp->Interpret = (cmd->device->id == hd->hostid);
397         cp->cp_datalen = htonl((unsigned long) cmd->request_bufflen);
398         cp->Auto_Req_Sen = 0;
399         cp->cp_reqDMA = htonl(0);
400         cp->reqlen = 0;
401
402         cp->cp_id = cmd->device->id;
403         cp->cp_lun = cmd->device->lun;
404         cp->cp_dispri = 0;
405         cp->cp_identify = 1;
406         memcpy(cp->cp_cdb, cmd->cmnd, COMMAND_SIZE(*cmd->cmnd));
407
408         cp->cp_statDMA = htonl(0);
409
410         cp->cp_viraddr = cp;
411         cp->cmd = cmd;
412         cmd->host_scribble = (char *) &hd->ccb[y];
413
414         if (cmd->use_sg == 0) {
415                 cmd->SCp.buffers_residual = 1;
416                 cmd->SCp.ptr = cmd->request_buffer;
417                 cmd->SCp.this_residual = cmd->request_bufflen;
418                 cmd->SCp.buffer = NULL;
419         } else {
420                 cmd->SCp.buffer = cmd->request_buffer;
421                 cmd->SCp.buffers_residual = cmd->use_sg;
422                 cmd->SCp.ptr = page_address(cmd->SCp.buffer->page) + cmd->SCp.buffer->offset;
423                 cmd->SCp.this_residual = cmd->SCp.buffer->length;
424         }
425         cmd->SCp.Status = (cmd->SCp.this_residual != 0);        /* TRUE as long as bytes 
426                                                                  * are to transfer */
427
428         if (eata_pio_send_command(base, EATA_CMD_PIO_SEND_CP)) {
429                 cmd->result = DID_BUS_BUSY << 16;
430                 printk(KERN_NOTICE "eata_pio_queue target %d, pid %ld, HBA busy, " "returning DID_BUS_BUSY, done.\n", cmd->device->id, cmd->pid);
431                 done(cmd);
432                 cp->status = FREE;
433                 return (0);
434         }
435         /* FIXME: timeout */
436         while (!(inb(base + HA_RSTATUS) & HA_SDRQ))
437                 cpu_relax();
438         outsw(base + HA_RDATA, cp, hd->cplen);
439         outb(EATA_CMD_PIO_TRUNC, base + HA_WCOMMAND);
440         for (x = 0; x < hd->cppadlen; x++)
441                 outw(0, base + HA_RDATA);
442
443         DBG(DBG_QUEUE, printk(KERN_DEBUG "Queued base %#.4lx pid: %ld target: %x " "lun: %x slot %d irq %d\n", (long) sh->base, cmd->pid, cmd->device->id, cmd->device->lun, y, sh->irq));
444
445         return (0);
446 }
447
448 static int eata_pio_abort(struct scsi_cmnd *cmd)
449 {
450         uint loop = HZ;
451
452         DBG(DBG_ABNORM, printk(KERN_WARNING "eata_pio_abort called pid: %ld " "target: %x lun: %x\n", cmd->pid, cmd->device->id, cmd->device->lun));
453
454
455         while (inb(cmd->device->host->base + HA_RAUXSTAT) & HA_ABUSY)
456                 if (--loop == 0) {
457                         printk(KERN_WARNING "eata_pio: abort, timeout error.\n");
458                         return FAILED;
459                 }
460         if (CD(cmd)->status == FREE) {
461                 DBG(DBG_ABNORM, printk(KERN_WARNING "Returning: SCSI_ABORT_NOT_RUNNING\n"));
462                 return FAILED;
463         }
464         if (CD(cmd)->status == USED) {
465                 DBG(DBG_ABNORM, printk(KERN_WARNING "Returning: SCSI_ABORT_BUSY\n"));
466                 /* We want to sleep a bit more here */
467                 return FAILED;          /* SNOOZE */
468         }
469         if (CD(cmd)->status == RESET) {
470                 printk(KERN_WARNING "eata_pio: abort, command reset error.\n");
471                 return FAILED;
472         }
473         if (CD(cmd)->status == LOCKED) {
474                 DBG(DBG_ABNORM, printk(KERN_WARNING "eata_pio: abort, queue slot " "locked.\n"));
475                 return FAILED;
476         }
477         panic("eata_pio: abort: invalid slot status\n");
478 }
479
480 static int eata_pio_host_reset(struct scsi_cmnd *cmd)
481 {
482         uint x, limit = 0;
483         unsigned char success = 0;
484         struct scsi_cmnd *sp;
485         struct Scsi_Host *host = cmd->device->host;
486
487         DBG(DBG_ABNORM, printk(KERN_WARNING "eata_pio_reset called pid:%ld target:" " %x lun: %x\n", cmd->pid, cmd->device->id, cmd->device->lun));
488
489         spin_lock_irq(host->host_lock);
490
491         if (HD(cmd)->state == RESET) {
492                 printk(KERN_WARNING "eata_pio_reset: exit, already in reset.\n");
493                 spin_unlock_irq(host->host_lock);
494                 return FAILED;
495         }
496
497         /* force all slots to be free */
498
499         for (x = 0; x < cmd->device->host->can_queue; x++) {
500
501                 if (HD(cmd)->ccb[x].status == FREE)
502                         continue;
503
504                 sp = HD(cmd)->ccb[x].cmd;
505                 HD(cmd)->ccb[x].status = RESET;
506                 printk(KERN_WARNING "eata_pio_reset: slot %d in reset, pid %ld.\n", x, sp->pid);
507
508                 if (sp == NULL)
509                         panic("eata_pio_reset: slot %d, sp==NULL.\n", x);
510         }
511
512         /* hard reset the HBA  */
513         outb(EATA_CMD_RESET, (uint) cmd->device->host->base + HA_WCOMMAND);
514
515         DBG(DBG_ABNORM, printk(KERN_WARNING "eata_pio_reset: board reset done.\n"));
516         HD(cmd)->state = RESET;
517
518         spin_unlock_irq(host->host_lock);
519         msleep(3000);
520         spin_lock_irq(host->host_lock);
521
522         DBG(DBG_ABNORM, printk(KERN_WARNING "eata_pio_reset: interrupts disabled, " "loops %d.\n", limit));
523
524         for (x = 0; x < cmd->device->host->can_queue; x++) {
525
526                 /* Skip slots already set free by interrupt */
527                 if (HD(cmd)->ccb[x].status != RESET)
528                         continue;
529
530                 sp = HD(cmd)->ccb[x].cmd;
531                 sp->result = DID_RESET << 16;
532
533                 /* This mailbox is terminated */
534                 printk(KERN_WARNING "eata_pio_reset: reset ccb %d.\n", x);
535                 HD(cmd)->ccb[x].status = FREE;
536
537                 sp->scsi_done(sp);
538         }
539
540         HD(cmd)->state = 0;
541
542         spin_unlock_irq(host->host_lock);
543
544         if (success) {          /* hmmm... */
545                 DBG(DBG_ABNORM, printk(KERN_WARNING "eata_pio_reset: exit, success.\n"));
546                 return SUCCESS;
547         } else {
548                 DBG(DBG_ABNORM, printk(KERN_WARNING "eata_pio_reset: exit, wakeup.\n"));
549                 return FAILED;
550         }
551 }
552
553 static char *get_pio_board_data(unsigned long base, uint irq, uint id, unsigned long cplen, unsigned short cppadlen)
554 {
555         struct eata_ccb cp;
556         static char buff[256];
557         int z;
558
559         memset(&cp, 0, sizeof(struct eata_ccb));
560         memset(buff, 0, sizeof(buff));
561
562         cp.DataIn = 1;
563         cp.Interpret = 1;       /* Interpret command */
564
565         cp.cp_datalen = htonl(254);
566         cp.cp_dataDMA = htonl(0);
567
568         cp.cp_id = id;
569         cp.cp_lun = 0;
570
571         cp.cp_cdb[0] = INQUIRY;
572         cp.cp_cdb[1] = 0;
573         cp.cp_cdb[2] = 0;
574         cp.cp_cdb[3] = 0;
575         cp.cp_cdb[4] = 254;
576         cp.cp_cdb[5] = 0;
577
578         if (eata_pio_send_command((uint) base, EATA_CMD_PIO_SEND_CP))
579                 return (NULL);
580         while (!(inb(base + HA_RSTATUS) & HA_SDRQ));
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         if (inb(base + HA_RSTATUS) & HA_SERROR)
588                 return (NULL);
589         else if (!(inb(base + HA_RSTATUS) & HA_SDRQ))
590                 return (NULL);
591         else {
592                 insw(base + HA_RDATA, &buff, 127);
593                 while (inb(base + HA_RSTATUS) & HA_SDRQ)
594                         inw(base + HA_RDATA);
595                 return (buff);
596         }
597 }
598
599 static int get_pio_conf_PIO(u32 base, struct get_conf *buf)
600 {
601         unsigned long loop = HZ / 2;
602         int z;
603         unsigned short *p;
604
605         if (!request_region(base, 9, "eata_pio"))
606                 return 0;
607
608         memset(buf, 0, sizeof(struct get_conf));
609
610         while (inb(base + HA_RSTATUS) & HA_SBUSY)
611                 if (--loop == 0)
612                         goto fail;
613
614         DBG(DBG_PIO && DBG_PROBE, printk(KERN_DEBUG "Issuing PIO READ CONFIG to HBA at %#x\n", base));
615         eata_pio_send_command(base, EATA_CMD_PIO_READ_CONFIG);
616
617         loop = HZ / 2;
618         for (p = (unsigned short *) buf; (long) p <= ((long) buf + (sizeof(struct get_conf) / 2)); p++) {
619                 while (!(inb(base + HA_RSTATUS) & HA_SDRQ))
620                         if (--loop == 0)
621                                 goto fail;
622
623                 loop = HZ / 2;
624                 *p = inw(base + HA_RDATA);
625         }
626         if (inb(base + HA_RSTATUS) & HA_SERROR) {
627                 DBG(DBG_PROBE, printk("eata_dma: get_conf_PIO, error during "
628                                         "transfer for HBA at %x\n", base));
629                 goto fail;
630         }
631
632         if (htonl(EATA_SIGNATURE) != buf->signature)
633                 goto fail;
634
635         DBG(DBG_PIO && DBG_PROBE, printk(KERN_NOTICE "EATA Controller found "
636                                 "at %#4x EATA Level: %x\n",
637                                 base, (uint) (buf->version)));
638
639         while (inb(base + HA_RSTATUS) & HA_SDRQ)
640                 inw(base + HA_RDATA);
641
642         if (!ALLOW_DMA_BOARDS) {
643                 for (z = 0; z < MAXISA; z++)
644                         if (base == ISAbases[z]) {
645                                 buf->IRQ = ISAirqs[z];
646                                 break;
647                         }
648         }
649
650         return 1;
651
652  fail:
653         release_region(base, 9);
654         return 0;
655 }
656
657 static void print_pio_config(struct get_conf *gc)
658 {
659         printk("Please check values: (read config data)\n");
660         printk("LEN: %d ver:%d OCS:%d TAR:%d TRNXFR:%d MORES:%d\n", (uint) ntohl(gc->len), gc->version, gc->OCS_enabled, gc->TAR_support, gc->TRNXFR, gc->MORE_support);
661         printk("HAAV:%d SCSIID0:%d ID1:%d ID2:%d QUEUE:%d SG:%d SEC:%d\n", gc->HAA_valid, gc->scsi_id[3], gc->scsi_id[2], gc->scsi_id[1], ntohs(gc->queuesiz), ntohs(gc->SGsiz), gc->SECOND);
662         printk("IRQ:%d IRQT:%d FORCADR:%d MCH:%d RIDQ:%d\n", gc->IRQ, gc->IRQ_TR, gc->FORCADR, gc->MAX_CHAN, gc->ID_qest);
663 }
664
665 static uint print_selftest(uint base)
666 {
667         unsigned char buffer[512];
668 #ifdef VERBOSE_SETUP
669         int z;
670 #endif
671
672         printk("eata_pio: executing controller self test & setup...\n");
673         while (inb(base + HA_RSTATUS) & HA_SBUSY);
674         outb(EATA_CMD_PIO_SETUPTEST, base + HA_WCOMMAND);
675         do {
676                 while (inb(base + HA_RSTATUS) & HA_SBUSY)
677                         /* nothing */ ;
678                 if (inb(base + HA_RSTATUS) & HA_SDRQ) {
679                         insw(base + HA_RDATA, &buffer, 256);
680 #ifdef VERBOSE_SETUP
681                         /* no beeps please... */
682                         for (z = 0; z < 511 && buffer[z]; z++)
683                                 if (buffer[z] != 7)
684                                         printk("%c", buffer[z]);
685 #endif
686                 }
687         } while (inb(base + HA_RSTATUS) & (HA_SBUSY | HA_SDRQ));
688
689         return (!(inb(base + HA_RSTATUS) & HA_SERROR));
690 }
691
692 static int register_pio_HBA(long base, struct get_conf *gc)
693 {
694         unsigned long size = 0;
695         char *buff;
696         unsigned long cplen;
697         unsigned short cppadlen;
698         struct Scsi_Host *sh;
699         hostdata *hd;
700
701         DBG(DBG_REGISTER, print_pio_config(gc));
702
703         if (gc->DMA_support) {
704                 printk("HBA at %#.4lx supports DMA. Please use EATA-DMA driver.\n", base);
705                 if (!ALLOW_DMA_BOARDS)
706                         return 0;
707         }
708
709         if ((buff = get_pio_board_data((uint) base, gc->IRQ, gc->scsi_id[3], cplen = (htonl(gc->cplen) + 1) / 2, cppadlen = (htons(gc->cppadlen) + 1) / 2)) == NULL) {
710                 printk("HBA at %#lx didn't react on INQUIRY. Sorry.\n", (unsigned long) base);
711                 return 0;
712         }
713
714         if (!print_selftest(base) && !ALLOW_DMA_BOARDS) {
715                 printk("HBA at %#lx failed while performing self test & setup.\n", (unsigned long) base);
716                 return 0;
717         }
718
719         size = sizeof(hostdata) + (sizeof(struct eata_ccb) * ntohs(gc->queuesiz));
720
721         sh = scsi_register(&driver_template, size);
722         if (sh == NULL)
723                 return 0;
724
725         if (!reg_IRQ[gc->IRQ]) {        /* Interrupt already registered ? */
726                 if (!request_irq(gc->IRQ, do_eata_pio_int_handler, SA_INTERRUPT, "EATA-PIO", sh)) {
727                         reg_IRQ[gc->IRQ]++;
728                         if (!gc->IRQ_TR)
729                                 reg_IRQL[gc->IRQ] = 1;  /* IRQ is edge triggered */
730                 } else {
731                         printk("Couldn't allocate IRQ %d, Sorry.\n", gc->IRQ);
732                         return 0;
733                 }
734         } else {                /* More than one HBA on this IRQ */
735                 if (reg_IRQL[gc->IRQ]) {
736                         printk("Can't support more than one HBA on this IRQ,\n" "  if the IRQ is edge triggered. Sorry.\n");
737                         return 0;
738                 } else
739                         reg_IRQ[gc->IRQ]++;
740         }
741
742         hd = SD(sh);
743
744         memset(hd->ccb, 0, (sizeof(struct eata_ccb) * ntohs(gc->queuesiz)));
745         memset(hd->reads, 0, sizeof(unsigned long) * 26);
746
747         strlcpy(SD(sh)->vendor, &buff[8], sizeof(SD(sh)->vendor));
748         strlcpy(SD(sh)->name, &buff[16], sizeof(SD(sh)->name));
749         SD(sh)->revision[0] = buff[32];
750         SD(sh)->revision[1] = buff[33];
751         SD(sh)->revision[2] = buff[34];
752         SD(sh)->revision[3] = '.';
753         SD(sh)->revision[4] = buff[35];
754         SD(sh)->revision[5] = 0;
755
756         switch (ntohl(gc->len)) {
757         case 0x1c:
758                 SD(sh)->EATA_revision = 'a';
759                 break;
760         case 0x1e:
761                 SD(sh)->EATA_revision = 'b';
762                 break;
763         case 0x22:
764                 SD(sh)->EATA_revision = 'c';
765                 break;
766         case 0x24:
767                 SD(sh)->EATA_revision = 'z';
768         default:
769                 SD(sh)->EATA_revision = '?';
770         }
771
772         if (ntohl(gc->len) >= 0x22) {
773                 if (gc->is_PCI)
774                         hd->bustype = IS_PCI;
775                 else if (gc->is_EISA)
776                         hd->bustype = IS_EISA;
777                 else
778                         hd->bustype = IS_ISA;
779         } else {
780                 if (buff[21] == '4')
781                         hd->bustype = IS_PCI;
782                 else if (buff[21] == '2')
783                         hd->bustype = IS_EISA;
784                 else
785                         hd->bustype = IS_ISA;
786         }
787
788         SD(sh)->cplen = cplen;
789         SD(sh)->cppadlen = cppadlen;
790         SD(sh)->hostid = gc->scsi_id[3];
791         SD(sh)->devflags = 1 << gc->scsi_id[3];
792         SD(sh)->moresupport = gc->MORE_support;
793         sh->unique_id = base;
794         sh->base = base;
795         sh->io_port = base;
796         sh->n_io_port = 9;
797         sh->irq = gc->IRQ;
798         sh->dma_channel = PIO;
799         sh->this_id = gc->scsi_id[3];
800         sh->can_queue = 1;
801         sh->cmd_per_lun = 1;
802         sh->sg_tablesize = SG_ALL;
803
804         hd->channel = 0;
805
806         sh->max_id = 8;
807         sh->max_lun = 8;
808
809         if (gc->SECOND)
810                 hd->primary = 0;
811         else
812                 hd->primary = 1;
813
814         sh->unchecked_isa_dma = 0;      /* We can only do PIO */
815
816         hd->next = NULL;        /* build a linked list of all HBAs */
817         hd->prev = last_HBA;
818         if (hd->prev != NULL)
819                 SD(hd->prev)->next = sh;
820         last_HBA = sh;
821         if (first_HBA == NULL)
822                 first_HBA = sh;
823         registered_HBAs++;
824         return (1);
825 }
826
827 static void find_pio_ISA(struct get_conf *buf)
828 {
829         int i;
830
831         for (i = 0; i < MAXISA; i++) {
832                 if (!ISAbases[i])
833                         continue;
834                 if (!get_pio_conf_PIO(ISAbases[i], buf))
835                         continue;
836                 if (!register_pio_HBA(ISAbases[i], buf))
837                         release_region(ISAbases[i], 9);
838                 else
839                         ISAbases[i] = 0;
840         }
841         return;
842 }
843
844 static void find_pio_EISA(struct get_conf *buf)
845 {
846         u32 base;
847         int i;
848
849 #ifdef CHECKPAL
850         u8 pal1, pal2, pal3;
851 #endif
852
853         for (i = 0; i < MAXEISA; i++) {
854                 if (EISAbases[i]) {     /* Still a possibility ?          */
855
856                         base = 0x1c88 + (i * 0x1000);
857 #ifdef CHECKPAL
858                         pal1 = inb((u16) base - 8);
859                         pal2 = inb((u16) base - 7);
860                         pal3 = inb((u16) base - 6);
861
862                         if (((pal1 == 0x12) && (pal2 == 0x14)) || ((pal1 == 0x38) && (pal2 == 0xa3) && (pal3 == 0x82)) || ((pal1 == 0x06) && (pal2 == 0x94) && (pal3 == 0x24))) {
863                                 DBG(DBG_PROBE, printk(KERN_NOTICE "EISA EATA id tags found: " "%x %x %x \n", (int) pal1, (int) pal2, (int) pal3));
864 #endif
865                                 if (get_pio_conf_PIO(base, buf)) {
866                                         DBG(DBG_PROBE && DBG_EISA, print_pio_config(buf));
867                                         if (buf->IRQ) {
868                                                 if (!register_pio_HBA(base, buf))
869                                                         release_region(base, 9);
870                                         } else {
871                                                 printk(KERN_NOTICE "eata_dma: No valid IRQ. HBA " "removed from list\n");
872                                                 release_region(base, 9);
873                                         }
874                                 }
875                                 /* Nothing found here so we take it from the list */
876                                 EISAbases[i] = 0;
877 #ifdef CHECKPAL
878                         }
879 #endif
880                 }
881         }
882         return;
883 }
884
885 static void find_pio_PCI(struct get_conf *buf)
886 {
887 #ifndef CONFIG_PCI
888         printk("eata_dma: kernel PCI support not enabled. Skipping scan for PCI HBAs.\n");
889 #else
890         struct pci_dev *dev = NULL;
891         u32 base, x;
892
893         while ((dev = pci_find_device(PCI_VENDOR_ID_DPT, PCI_DEVICE_ID_DPT, dev)) != NULL) {
894                 DBG(DBG_PROBE && DBG_PCI, printk("eata_pio: find_PCI, HBA at %s\n", pci_name(dev)));
895                 if (pci_enable_device(dev))
896                         continue;
897                 pci_set_master(dev);
898                 base = pci_resource_flags(dev, 0);
899                 if (base & IORESOURCE_MEM) {
900                         printk("eata_pio: invalid base address of device %s\n", pci_name(dev));
901                         continue;
902                 }
903                 base = pci_resource_start(dev, 0);
904                 /* EISA tag there ? */
905                 if ((inb(base) == 0x12) && (inb(base + 1) == 0x14))
906                         continue;       /* Jep, it's forced, so move on  */
907                 base += 0x10;   /* Now, THIS is the real address */
908                 if (base != 0x1f8) {
909                         /* We didn't find it in the primary search */
910                         if (get_pio_conf_PIO(base, buf)) {
911                                 if (buf->FORCADR) {     /* If the address is forced */
912                                         release_region(base, 9);
913                                         continue;       /* we'll find it later      */
914                                 }
915
916                                 /* OK. We made it till here, so we can go now  
917                                  * and register it. We  only have to check and 
918                                  * eventually remove it from the EISA and ISA list 
919                                  */
920
921                                 if (!register_pio_HBA(base, buf)) {
922                                         release_region(base, 9);
923                                         continue;
924                                 }
925
926                                 if (base < 0x1000) {
927                                         for (x = 0; x < MAXISA; ++x) {
928                                                 if (ISAbases[x] == base) {
929                                                         ISAbases[x] = 0;
930                                                         break;
931                                                 }
932                                         }
933                                 } else if ((base & 0x0fff) == 0x0c88) {
934                                         x = (base >> 12) & 0x0f;
935                                         EISAbases[x] = 0;
936                                 }
937                         }
938 #ifdef CHECK_BLINK
939                         else if (check_blink_state(base)) {
940                                 printk("eata_pio: HBA is in BLINK state.\n" "Consult your HBAs manual to correct this.\n");
941                         }
942 #endif
943                 }
944         }
945 #endif                          /* #ifndef CONFIG_PCI */
946 }
947
948 static int eata_pio_detect(struct scsi_host_template *tpnt)
949 {
950         struct Scsi_Host *HBA_ptr;
951         struct get_conf gc;
952         int i;
953
954         find_pio_PCI(&gc);
955         find_pio_EISA(&gc);
956         find_pio_ISA(&gc);
957
958         for (i = 0; i <= MAXIRQ; i++)
959                 if (reg_IRQ[i])
960                         request_irq(i, do_eata_pio_int_handler, SA_INTERRUPT, "EATA-PIO", NULL);
961
962         HBA_ptr = first_HBA;
963
964         if (registered_HBAs != 0) {
965                 printk("EATA (Extended Attachment) PIO driver version: %d.%d%s\n"
966                        "(c) 1993-95 Michael Neuffer, neuffer@goofy.zdv.uni-mainz.de\n" "            Alfred Arnold,   a.arnold@kfa-juelich.de\n" "This release only supports DASD devices (harddisks)\n", VER_MAJOR, VER_MINOR, VER_SUB);
967
968                 printk("Registered HBAs:\n");
969                 printk("HBA no. Boardtype: Revis: EATA: Bus: BaseIO: IRQ: Ch: ID: Pr:" " QS: SG: CPL:\n");
970                 for (i = 1; i <= registered_HBAs; i++) {
971                         printk("scsi%-2d: %.10s v%s 2.0%c  %s %#.4x   %2d   %d   %d   %c"
972                                "  %2d  %2d  %2d\n",
973                                HBA_ptr->host_no, SD(HBA_ptr)->name, SD(HBA_ptr)->revision,
974                                SD(HBA_ptr)->EATA_revision, (SD(HBA_ptr)->bustype == 'P') ?
975                                "PCI " : (SD(HBA_ptr)->bustype == 'E') ? "EISA" : "ISA ",
976                                (uint) HBA_ptr->base, HBA_ptr->irq, SD(HBA_ptr)->channel, HBA_ptr->this_id,
977                                SD(HBA_ptr)->primary ? 'Y' : 'N', HBA_ptr->can_queue,
978                                HBA_ptr->sg_tablesize, HBA_ptr->cmd_per_lun);
979                         HBA_ptr = SD(HBA_ptr)->next;
980                 }
981         }
982         return (registered_HBAs);
983 }
984
985 static struct scsi_host_template driver_template = {
986         .proc_name              = "eata_pio",
987         .name                   = "EATA (Extended Attachment) PIO driver",
988         .proc_info              = eata_pio_proc_info,
989         .detect                 = eata_pio_detect,
990         .release                = eata_pio_release,
991         .queuecommand           = eata_pio_queue,
992         .eh_abort_handler       = eata_pio_abort,
993         .eh_host_reset_handler  = eata_pio_host_reset,
994         .use_clustering         = ENABLE_CLUSTERING,
995 };
996
997 MODULE_AUTHOR("Michael Neuffer, Alfred Arnold");
998 MODULE_DESCRIPTION("EATA SCSI PIO driver");
999 MODULE_LICENSE("GPL");
1000
1001 #include "scsi_module.c"