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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@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 
eata_pio_show_info(struct seq_file * m,struct Scsi_Host * shost)95 static int eata_pio_show_info(struct seq_file *m, struct Scsi_Host *shost)
96 {
97 	seq_printf(m, "EATA (Extended Attachment) PIO driver version: "
98 		   "%d.%d%s\n",VER_MAJOR, VER_MINOR, VER_SUB);
99 	seq_printf(m, "queued commands:     %10ld\n"
100 		   "processed interrupts:%10ld\n", queue_counter, int_counter);
101 	seq_printf(m, "\nscsi%-2d: HBA %.10s\n",
102 		   shost->host_no, SD(shost)->name);
103 	seq_printf(m, "Firmware revision: v%s\n",
104 		   SD(shost)->revision);
105 	seq_puts(m, "IO: PIO\n");
106 	seq_printf(m, "Base IO : %#.4x\n", (u32) shost->base);
107 	seq_printf(m, "Host Bus: %s\n",
108 		   (SD(shost)->bustype == 'P')?"PCI ":
109 		   (SD(shost)->bustype == 'E')?"EISA":"ISA ");
110 	return 0;
111 }
112 
eata_pio_release(struct Scsi_Host * sh)113 static int eata_pio_release(struct Scsi_Host *sh)
114 {
115 	hostdata *hd = SD(sh);
116 	if (sh->irq && reg_IRQ[sh->irq] == 1)
117 		free_irq(sh->irq, NULL);
118 	else
119 		reg_IRQ[sh->irq]--;
120 	if (SD(sh)->channel == 0) {
121 		if (sh->io_port && sh->n_io_port)
122 			release_region(sh->io_port, sh->n_io_port);
123 	}
124 	/* At this point the PCI reference can go */
125 	if (hd->pdev)
126 		pci_dev_put(hd->pdev);
127 	return 1;
128 }
129 
IncStat(struct scsi_pointer * SCp,unsigned int Increment)130 static void IncStat(struct scsi_pointer *SCp, unsigned int Increment)
131 {
132 	SCp->ptr += Increment;
133 	if ((SCp->this_residual -= Increment) == 0) {
134 		if ((--SCp->buffers_residual) == 0)
135 			SCp->Status = 0;
136 		else {
137 			SCp->buffer++;
138 			SCp->ptr = sg_virt(SCp->buffer);
139 			SCp->this_residual = SCp->buffer->length;
140 		}
141 	}
142 }
143 
144 static irqreturn_t eata_pio_int_handler(int irq, void *dev_id);
145 
do_eata_pio_int_handler(int irq,void * dev_id)146 static irqreturn_t do_eata_pio_int_handler(int irq, void *dev_id)
147 {
148 	unsigned long flags;
149 	struct Scsi_Host *dev = dev_id;
150 	irqreturn_t ret;
151 
152 	spin_lock_irqsave(dev->host_lock, flags);
153 	ret = eata_pio_int_handler(irq, dev_id);
154 	spin_unlock_irqrestore(dev->host_lock, flags);
155 	return ret;
156 }
157 
eata_pio_int_handler(int irq,void * dev_id)158 static irqreturn_t eata_pio_int_handler(int irq, void *dev_id)
159 {
160 	unsigned int eata_stat = 0xfffff;
161 	struct scsi_cmnd *cmd;
162 	hostdata *hd;
163 	struct eata_ccb *cp;
164 	unsigned long base;
165 	unsigned int x, z;
166 	struct Scsi_Host *sh;
167 	unsigned short zwickel = 0;
168 	unsigned char stat, odd;
169 	irqreturn_t ret = IRQ_NONE;
170 
171 	for (x = 1, sh = first_HBA; x <= registered_HBAs; x++, sh = SD(sh)->prev)
172 	{
173 		if (sh->irq != irq)
174 			continue;
175 		if (inb(sh->base + HA_RSTATUS) & HA_SBUSY)
176 			continue;
177 
178 		int_counter++;
179 		ret = IRQ_HANDLED;
180 
181 		hd = SD(sh);
182 
183 		cp = &hd->ccb[0];
184 		cmd = cp->cmd;
185 		base = cmd->device->host->base;
186 
187 		do {
188 			stat = inb(base + HA_RSTATUS);
189 			if (stat & HA_SDRQ) {
190 				if (cp->DataIn) {
191 					z = 256;
192 					odd = 0;
193 					while ((cmd->SCp.Status) && ((z > 0) || (odd))) {
194 						if (odd) {
195 							*(cmd->SCp.ptr) = zwickel >> 8;
196 							IncStat(&cmd->SCp, 1);
197 							odd = 0;
198 						}
199 						x = min_t(unsigned int, z, cmd->SCp.this_residual / 2);
200 						insw(base + HA_RDATA, cmd->SCp.ptr, x);
201 						z -= x;
202 						IncStat(&cmd->SCp, 2 * x);
203 						if ((z > 0) && (cmd->SCp.this_residual == 1)) {
204 							zwickel = inw(base + HA_RDATA);
205 							*(cmd->SCp.ptr) = zwickel & 0xff;
206 							IncStat(&cmd->SCp, 1);
207 							z--;
208 							odd = 1;
209 						}
210 					}
211 					while (z > 0) {
212 						zwickel = inw(base + HA_RDATA);
213 						z--;
214 					}
215 				} else {	/* cp->DataOut */
216 
217 					odd = 0;
218 					z = 256;
219 					while ((cmd->SCp.Status) && ((z > 0) || (odd))) {
220 						if (odd) {
221 							zwickel += *(cmd->SCp.ptr) << 8;
222 							IncStat(&cmd->SCp, 1);
223 							outw(zwickel, base + HA_RDATA);
224 							z--;
225 							odd = 0;
226 						}
227 						x = min_t(unsigned int, z, cmd->SCp.this_residual / 2);
228 						outsw(base + HA_RDATA, cmd->SCp.ptr, x);
229 						z -= x;
230 						IncStat(&cmd->SCp, 2 * x);
231 						if ((z > 0) && (cmd->SCp.this_residual == 1)) {
232 							zwickel = *(cmd->SCp.ptr);
233 							zwickel &= 0xff;
234 							IncStat(&cmd->SCp, 1);
235 							odd = 1;
236 						}
237 					}
238 					while (z > 0 || odd) {
239 						outw(zwickel, base + HA_RDATA);
240 						z--;
241 						odd = 0;
242 					}
243 				}
244 			}
245 		}
246 		while ((stat & HA_SDRQ) || ((stat & HA_SMORE) && hd->moresupport));
247 
248 		/* terminate handler if HBA goes busy again, i.e. transfers
249 		 * more data */
250 
251 		if (stat & HA_SBUSY)
252 			break;
253 
254 		/* OK, this is quite stupid, but I haven't found any correct
255 		 * way to get HBA&SCSI status so far */
256 
257 		if (!(inb(base + HA_RSTATUS) & HA_SERROR)) {
258 			cmd->result = (DID_OK << 16);
259 			hd->devflags |= (1 << cp->cp_id);
260 		} else if (hd->devflags & (1 << cp->cp_id))
261 			cmd->result = (DID_OK << 16) + 0x02;
262 		else
263 			cmd->result = (DID_NO_CONNECT << 16);
264 
265 		if (cp->status == LOCKED) {
266 			cp->status = FREE;
267 			eata_stat = inb(base + HA_RSTATUS);
268 			printk(KERN_CRIT "eata_pio: int_handler, freeing locked " "queueslot\n");
269 			return ret;
270 		}
271 #if DBG_INTR2
272 		if (stat != 0x50)
273 			printk(KERN_DEBUG "stat: %#.2x, result: %#.8x\n", stat, cmd->result);
274 #endif
275 
276 		cp->status = FREE;	/* now we can release the slot  */
277 
278 		cmd->scsi_done(cmd);
279 	}
280 
281 	return ret;
282 }
283 
eata_pio_send_command(unsigned long base,unsigned char command)284 static inline unsigned int eata_pio_send_command(unsigned long base, unsigned char command)
285 {
286 	unsigned int loop = 50;
287 
288 	while (inb(base + HA_RSTATUS) & HA_SBUSY)
289 		if (--loop == 0)
290 			return 1;
291 
292 	/* Enable interrupts for HBA.  It is not the best way to do it at this
293 	 * place, but I hope that it doesn't interfere with the IDE driver
294 	 * initialization this way */
295 
296 	outb(HA_CTRL_8HEADS, base + HA_CTRLREG);
297 
298 	outb(command, base + HA_WCOMMAND);
299 	return 0;
300 }
301 
eata_pio_queue_lck(struct scsi_cmnd * cmd,void (* done)(struct scsi_cmnd *))302 static int eata_pio_queue_lck(struct scsi_cmnd *cmd,
303 		void (*done)(struct scsi_cmnd *))
304 {
305 	unsigned int x, y;
306 	unsigned long base;
307 
308 	hostdata *hd;
309 	struct Scsi_Host *sh;
310 	struct eata_ccb *cp;
311 
312 	queue_counter++;
313 
314 	hd = HD(cmd);
315 	sh = cmd->device->host;
316 	base = sh->base;
317 
318 	/* use only slot 0, as 2001 can handle only one cmd at a time */
319 
320 	y = x = 0;
321 
322 	if (hd->ccb[y].status != FREE) {
323 
324 		DBG(DBG_QUEUE, printk(KERN_EMERG "can_queue %d, x %d, y %d\n", sh->can_queue, x, y));
325 #if DEBUG_EATA
326 		panic(KERN_EMERG "eata_pio: run out of queue slots cmdno:%ld " "intrno: %ld\n", queue_counter, int_counter);
327 #else
328 		panic(KERN_EMERG "eata_pio: run out of queue slots....\n");
329 #endif
330 	}
331 
332 	cp = &hd->ccb[y];
333 
334 	memset(cp, 0, sizeof(struct eata_ccb));
335 
336 	cp->status = USED;	/* claim free slot */
337 
338 	DBG(DBG_QUEUE, scmd_printk(KERN_DEBUG, cmd,
339 		"eata_pio_queue 0x%p, y %d\n", cmd, y));
340 
341 	cmd->scsi_done = (void *) done;
342 
343 	if (cmd->sc_data_direction == DMA_TO_DEVICE)
344 		cp->DataOut = 1;	/* Output mode */
345 	else
346 		cp->DataIn = 0;	/* Input mode  */
347 
348 	cp->Interpret = (cmd->device->id == hd->hostid);
349 	cp->cp_datalen = cpu_to_be32(scsi_bufflen(cmd));
350 	cp->Auto_Req_Sen = 0;
351 	cp->cp_reqDMA = 0;
352 	cp->reqlen = 0;
353 
354 	cp->cp_id = cmd->device->id;
355 	cp->cp_lun = cmd->device->lun;
356 	cp->cp_dispri = 0;
357 	cp->cp_identify = 1;
358 	memcpy(cp->cp_cdb, cmd->cmnd, COMMAND_SIZE(*cmd->cmnd));
359 
360 	cp->cp_statDMA = 0;
361 
362 	cp->cp_viraddr = cp;
363 	cp->cmd = cmd;
364 	cmd->host_scribble = (char *) &hd->ccb[y];
365 
366 	if (!scsi_bufflen(cmd)) {
367 		cmd->SCp.buffers_residual = 1;
368 		cmd->SCp.ptr = NULL;
369 		cmd->SCp.this_residual = 0;
370 		cmd->SCp.buffer = NULL;
371 	} else {
372 		cmd->SCp.buffer = scsi_sglist(cmd);
373 		cmd->SCp.buffers_residual = scsi_sg_count(cmd);
374 		cmd->SCp.ptr = sg_virt(cmd->SCp.buffer);
375 		cmd->SCp.this_residual = cmd->SCp.buffer->length;
376 	}
377 	cmd->SCp.Status = (cmd->SCp.this_residual != 0);	/* TRUE as long as bytes
378 								 * are to transfer */
379 
380 	if (eata_pio_send_command(base, EATA_CMD_PIO_SEND_CP)) {
381 		cmd->result = DID_BUS_BUSY << 16;
382 		scmd_printk(KERN_NOTICE, cmd,
383 			"eata_pio_queue pid 0x%p, HBA busy, "
384 			"returning DID_BUS_BUSY, done.\n", cmd);
385 		done(cmd);
386 		cp->status = FREE;
387 		return 0;
388 	}
389 	/* FIXME: timeout */
390 	while (!(inb(base + HA_RSTATUS) & HA_SDRQ))
391 		cpu_relax();
392 	outsw(base + HA_RDATA, cp, hd->cplen);
393 	outb(EATA_CMD_PIO_TRUNC, base + HA_WCOMMAND);
394 	for (x = 0; x < hd->cppadlen; x++)
395 		outw(0, base + HA_RDATA);
396 
397 	DBG(DBG_QUEUE, scmd_printk(KERN_DEBUG, cmd,
398 		"Queued base %#.4lx cmd: 0x%p "
399 		"slot %d irq %d\n", sh->base, cmd, y, sh->irq));
400 
401 	return 0;
402 }
403 
DEF_SCSI_QCMD(eata_pio_queue)404 static DEF_SCSI_QCMD(eata_pio_queue)
405 
406 static int eata_pio_abort(struct scsi_cmnd *cmd)
407 {
408 	unsigned int loop = 100;
409 
410 	DBG(DBG_ABNORM, scmd_printk(KERN_WARNING, cmd,
411 		"eata_pio_abort called pid: 0x%p\n", cmd));
412 
413 	while (inb(cmd->device->host->base + HA_RAUXSTAT) & HA_ABUSY)
414 		if (--loop == 0) {
415 			printk(KERN_WARNING "eata_pio: abort, timeout error.\n");
416 			return FAILED;
417 		}
418 	if (CD(cmd)->status == FREE) {
419 		DBG(DBG_ABNORM, printk(KERN_WARNING "Returning: SCSI_ABORT_NOT_RUNNING\n"));
420 		return FAILED;
421 	}
422 	if (CD(cmd)->status == USED) {
423 		DBG(DBG_ABNORM, printk(KERN_WARNING "Returning: SCSI_ABORT_BUSY\n"));
424 		/* We want to sleep a bit more here */
425 		return FAILED;		/* SNOOZE */
426 	}
427 	if (CD(cmd)->status == RESET) {
428 		printk(KERN_WARNING "eata_pio: abort, command reset error.\n");
429 		return FAILED;
430 	}
431 	if (CD(cmd)->status == LOCKED) {
432 		DBG(DBG_ABNORM, printk(KERN_WARNING "eata_pio: abort, queue slot " "locked.\n"));
433 		return FAILED;
434 	}
435 	panic("eata_pio: abort: invalid slot status\n");
436 }
437 
eata_pio_host_reset(struct scsi_cmnd * cmd)438 static int eata_pio_host_reset(struct scsi_cmnd *cmd)
439 {
440 	unsigned int x, limit = 0;
441 	unsigned char success = 0;
442 	struct scsi_cmnd *sp;
443 	struct Scsi_Host *host = cmd->device->host;
444 
445 	DBG(DBG_ABNORM, scmd_printk(KERN_WARNING, cmd,
446 		"eata_pio_reset called\n"));
447 
448 	spin_lock_irq(host->host_lock);
449 
450 	if (HD(cmd)->state == RESET) {
451 		printk(KERN_WARNING "eata_pio_reset: exit, already in reset.\n");
452 		spin_unlock_irq(host->host_lock);
453 		return FAILED;
454 	}
455 
456 	/* force all slots to be free */
457 
458 	for (x = 0; x < cmd->device->host->can_queue; x++) {
459 
460 		if (HD(cmd)->ccb[x].status == FREE)
461 			continue;
462 
463 		sp = HD(cmd)->ccb[x].cmd;
464 		HD(cmd)->ccb[x].status = RESET;
465 		printk(KERN_WARNING "eata_pio_reset: slot %d in reset.\n", x);
466 
467 		if (sp == NULL)
468 			panic("eata_pio_reset: slot %d, sp==NULL.\n", x);
469 	}
470 
471 	/* hard reset the HBA  */
472 	outb(EATA_CMD_RESET, cmd->device->host->base + HA_WCOMMAND);
473 
474 	DBG(DBG_ABNORM, printk(KERN_WARNING "eata_pio_reset: board reset done.\n"));
475 	HD(cmd)->state = RESET;
476 
477 	spin_unlock_irq(host->host_lock);
478 	msleep(3000);
479 	spin_lock_irq(host->host_lock);
480 
481 	DBG(DBG_ABNORM, printk(KERN_WARNING "eata_pio_reset: interrupts disabled, " "loops %d.\n", limit));
482 
483 	for (x = 0; x < cmd->device->host->can_queue; x++) {
484 
485 		/* Skip slots already set free by interrupt */
486 		if (HD(cmd)->ccb[x].status != RESET)
487 			continue;
488 
489 		sp = HD(cmd)->ccb[x].cmd;
490 		sp->result = DID_RESET << 16;
491 
492 		/* This mailbox is terminated */
493 		printk(KERN_WARNING "eata_pio_reset: reset ccb %d.\n", x);
494 		HD(cmd)->ccb[x].status = FREE;
495 
496 		sp->scsi_done(sp);
497 	}
498 
499 	HD(cmd)->state = 0;
500 
501 	spin_unlock_irq(host->host_lock);
502 
503 	if (success) {		/* hmmm... */
504 		DBG(DBG_ABNORM, printk(KERN_WARNING "eata_pio_reset: exit, success.\n"));
505 		return SUCCESS;
506 	} else {
507 		DBG(DBG_ABNORM, printk(KERN_WARNING "eata_pio_reset: exit, wakeup.\n"));
508 		return FAILED;
509 	}
510 }
511 
get_pio_board_data(unsigned long base,unsigned int irq,unsigned int id,unsigned long cplen,unsigned short cppadlen)512 static char *get_pio_board_data(unsigned long base, unsigned int irq, unsigned int id, unsigned long cplen, unsigned short cppadlen)
513 {
514 	struct eata_ccb cp;
515 	static char buff[256];
516 	int z;
517 
518 	memset(&cp, 0, sizeof(struct eata_ccb));
519 	memset(buff, 0, sizeof(buff));
520 
521 	cp.DataIn = 1;
522 	cp.Interpret = 1;	/* Interpret command */
523 
524 	cp.cp_datalen = cpu_to_be32(254);
525 	cp.cp_dataDMA = cpu_to_be32(0);
526 
527 	cp.cp_id = id;
528 	cp.cp_lun = 0;
529 
530 	cp.cp_cdb[0] = INQUIRY;
531 	cp.cp_cdb[1] = 0;
532 	cp.cp_cdb[2] = 0;
533 	cp.cp_cdb[3] = 0;
534 	cp.cp_cdb[4] = 254;
535 	cp.cp_cdb[5] = 0;
536 
537 	if (eata_pio_send_command(base, EATA_CMD_PIO_SEND_CP))
538 		return NULL;
539 
540 	while (!(inb(base + HA_RSTATUS) & HA_SDRQ))
541 		cpu_relax();
542 
543 	outsw(base + HA_RDATA, &cp, cplen);
544 	outb(EATA_CMD_PIO_TRUNC, base + HA_WCOMMAND);
545 	for (z = 0; z < cppadlen; z++)
546 		outw(0, base + HA_RDATA);
547 
548 	while (inb(base + HA_RSTATUS) & HA_SBUSY)
549 		cpu_relax();
550 
551 	if (inb(base + HA_RSTATUS) & HA_SERROR)
552 		return NULL;
553 	else if (!(inb(base + HA_RSTATUS) & HA_SDRQ))
554 		return NULL;
555 	else {
556 		insw(base + HA_RDATA, &buff, 127);
557 		while (inb(base + HA_RSTATUS) & HA_SDRQ)
558 			inw(base + HA_RDATA);
559 		return buff;
560 	}
561 }
562 
get_pio_conf_PIO(unsigned long base,struct get_conf * buf)563 static int get_pio_conf_PIO(unsigned long base, struct get_conf *buf)
564 {
565 	unsigned long loop = HZ / 2;
566 	int z;
567 	unsigned short *p;
568 
569 	if (!request_region(base, 9, "eata_pio"))
570 		return 0;
571 
572 	memset(buf, 0, sizeof(struct get_conf));
573 
574 	while (inb(base + HA_RSTATUS) & HA_SBUSY)
575 		if (--loop == 0)
576 			goto fail;
577 
578 	DBG(DBG_PIO && DBG_PROBE, printk(KERN_DEBUG "Issuing PIO READ CONFIG to HBA at %#lx\n", base));
579 	eata_pio_send_command(base, EATA_CMD_PIO_READ_CONFIG);
580 
581 	loop = 50;
582 	for (p = (unsigned short *) buf; (long) p <= ((long) buf + (sizeof(struct get_conf) / 2)); p++) {
583 		while (!(inb(base + HA_RSTATUS) & HA_SDRQ))
584 			if (--loop == 0)
585 				goto fail;
586 
587 		loop = 50;
588 		*p = inw(base + HA_RDATA);
589 	}
590 	if (inb(base + HA_RSTATUS) & HA_SERROR) {
591 		DBG(DBG_PROBE, printk("eata_dma: get_conf_PIO, error during "
592 					"transfer for HBA at %lx\n", base));
593 		goto fail;
594 	}
595 
596 	if (cpu_to_be32(EATA_SIGNATURE) != buf->signature)
597 		goto fail;
598 
599 	DBG(DBG_PIO && DBG_PROBE, printk(KERN_NOTICE "EATA Controller found "
600 				"at %#4lx EATA Level: %x\n",
601 				base, (unsigned int) (buf->version)));
602 
603 	while (inb(base + HA_RSTATUS) & HA_SDRQ)
604 		inw(base + HA_RDATA);
605 
606 	if (!ALLOW_DMA_BOARDS) {
607 		for (z = 0; z < MAXISA; z++)
608 			if (base == ISAbases[z]) {
609 				buf->IRQ = ISAirqs[z];
610 				break;
611 			}
612 	}
613 
614 	return 1;
615 
616  fail:
617 	release_region(base, 9);
618 	return 0;
619 }
620 
print_pio_config(struct get_conf * gc)621 static void print_pio_config(struct get_conf *gc)
622 {
623 	printk("Please check values: (read config data)\n");
624 	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);
625 	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);
626 	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);
627 }
628 
print_selftest(unsigned int base)629 static unsigned int print_selftest(unsigned int base)
630 {
631 	unsigned char buffer[512];
632 #ifdef VERBOSE_SETUP
633 	int z;
634 #endif
635 
636 	printk("eata_pio: executing controller self test & setup...\n");
637 	while (inb(base + HA_RSTATUS) & HA_SBUSY);
638 	outb(EATA_CMD_PIO_SETUPTEST, base + HA_WCOMMAND);
639 	do {
640 		while (inb(base + HA_RSTATUS) & HA_SBUSY)
641 			/* nothing */ ;
642 		if (inb(base + HA_RSTATUS) & HA_SDRQ) {
643 			insw(base + HA_RDATA, &buffer, 256);
644 #ifdef VERBOSE_SETUP
645 			/* no beeps please... */
646 			for (z = 0; z < 511 && buffer[z]; z++)
647 				if (buffer[z] != 7)
648 					printk("%c", buffer[z]);
649 #endif
650 		}
651 	} while (inb(base + HA_RSTATUS) & (HA_SBUSY | HA_SDRQ));
652 
653 	return (!(inb(base + HA_RSTATUS) & HA_SERROR));
654 }
655 
register_pio_HBA(long base,struct get_conf * gc,struct pci_dev * pdev)656 static int register_pio_HBA(long base, struct get_conf *gc, struct pci_dev *pdev)
657 {
658 	unsigned long size = 0;
659 	char *buff;
660 	unsigned long cplen;
661 	unsigned short cppadlen;
662 	struct Scsi_Host *sh;
663 	hostdata *hd;
664 
665 	DBG(DBG_REGISTER, print_pio_config(gc));
666 
667 	if (gc->DMA_support) {
668 		printk("HBA at %#.4lx supports DMA. Please use EATA-DMA driver.\n", base);
669 		if (!ALLOW_DMA_BOARDS)
670 			return 0;
671 	}
672 
673 	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) {
674 		printk("HBA at %#lx didn't react on INQUIRY. Sorry.\n", base);
675 		return 0;
676 	}
677 
678 	if (!print_selftest(base) && !ALLOW_DMA_BOARDS) {
679 		printk("HBA at %#lx failed while performing self test & setup.\n", base);
680 		return 0;
681 	}
682 
683 	size = sizeof(hostdata) + (sizeof(struct eata_ccb) * be16_to_cpu(gc->queuesiz));
684 
685 	sh = scsi_register(&driver_template, size);
686 	if (sh == NULL)
687 		return 0;
688 
689 	if (!reg_IRQ[gc->IRQ]) {	/* Interrupt already registered ? */
690 		if (!request_irq(gc->IRQ, do_eata_pio_int_handler, 0, "EATA-PIO", sh)) {
691 			reg_IRQ[gc->IRQ]++;
692 			if (!gc->IRQ_TR)
693 				reg_IRQL[gc->IRQ] = 1;	/* IRQ is edge triggered */
694 		} else {
695 			printk("Couldn't allocate IRQ %d, Sorry.\n", gc->IRQ);
696 			return 0;
697 		}
698 	} else {		/* More than one HBA on this IRQ */
699 		if (reg_IRQL[gc->IRQ]) {
700 			printk("Can't support more than one HBA on this IRQ,\n" "  if the IRQ is edge triggered. Sorry.\n");
701 			return 0;
702 		} else
703 			reg_IRQ[gc->IRQ]++;
704 	}
705 
706 	hd = SD(sh);
707 
708 	memset(hd->ccb, 0, (sizeof(struct eata_ccb) * be16_to_cpu(gc->queuesiz)));
709 	memset(hd->reads, 0, sizeof(hd->reads));
710 
711 	strlcpy(SD(sh)->vendor, &buff[8], sizeof(SD(sh)->vendor));
712 	strlcpy(SD(sh)->name, &buff[16], sizeof(SD(sh)->name));
713 	SD(sh)->revision[0] = buff[32];
714 	SD(sh)->revision[1] = buff[33];
715 	SD(sh)->revision[2] = buff[34];
716 	SD(sh)->revision[3] = '.';
717 	SD(sh)->revision[4] = buff[35];
718 	SD(sh)->revision[5] = 0;
719 
720 	switch (be32_to_cpu(gc->len)) {
721 	case 0x1c:
722 		SD(sh)->EATA_revision = 'a';
723 		break;
724 	case 0x1e:
725 		SD(sh)->EATA_revision = 'b';
726 		break;
727 	case 0x22:
728 		SD(sh)->EATA_revision = 'c';
729 		break;
730 	case 0x24:
731 		SD(sh)->EATA_revision = 'z';
732 		break;
733 	default:
734 		SD(sh)->EATA_revision = '?';
735 	}
736 
737 	if (be32_to_cpu(gc->len) >= 0x22) {
738 		if (gc->is_PCI)
739 			hd->bustype = IS_PCI;
740 		else if (gc->is_EISA)
741 			hd->bustype = IS_EISA;
742 		else
743 			hd->bustype = IS_ISA;
744 	} else {
745 		if (buff[21] == '4')
746 			hd->bustype = IS_PCI;
747 		else if (buff[21] == '2')
748 			hd->bustype = IS_EISA;
749 		else
750 			hd->bustype = IS_ISA;
751 	}
752 
753 	SD(sh)->cplen = cplen;
754 	SD(sh)->cppadlen = cppadlen;
755 	SD(sh)->hostid = gc->scsi_id[3];
756 	SD(sh)->devflags = 1 << gc->scsi_id[3];
757 	SD(sh)->moresupport = gc->MORE_support;
758 	sh->unique_id = base;
759 	sh->base = base;
760 	sh->io_port = base;
761 	sh->n_io_port = 9;
762 	sh->irq = gc->IRQ;
763 	sh->dma_channel = PIO;
764 	sh->this_id = gc->scsi_id[3];
765 	sh->can_queue = 1;
766 	sh->cmd_per_lun = 1;
767 	sh->sg_tablesize = SG_ALL;
768 
769 	hd->channel = 0;
770 
771 	hd->pdev = pci_dev_get(pdev);	/* Keep a PCI reference */
772 
773 	sh->max_id = 8;
774 	sh->max_lun = 8;
775 
776 	if (gc->SECOND)
777 		hd->primary = 0;
778 	else
779 		hd->primary = 1;
780 
781 	hd->next = NULL;	/* build a linked list of all HBAs */
782 	hd->prev = last_HBA;
783 	if (hd->prev != NULL)
784 		SD(hd->prev)->next = sh;
785 	last_HBA = sh;
786 	if (first_HBA == NULL)
787 		first_HBA = sh;
788 	registered_HBAs++;
789 	return (1);
790 }
791 
find_pio_ISA(struct get_conf * buf)792 static void find_pio_ISA(struct get_conf *buf)
793 {
794 	int i;
795 
796 	for (i = 0; i < MAXISA; i++) {
797 		if (!ISAbases[i])
798 			continue;
799 		if (!get_pio_conf_PIO(ISAbases[i], buf))
800 			continue;
801 		if (!register_pio_HBA(ISAbases[i], buf, NULL))
802 			release_region(ISAbases[i], 9);
803 		else
804 			ISAbases[i] = 0;
805 	}
806 	return;
807 }
808 
find_pio_EISA(struct get_conf * buf)809 static void find_pio_EISA(struct get_conf *buf)
810 {
811 	u32 base;
812 	int i;
813 
814 #ifdef CHECKPAL
815 	u8 pal1, pal2, pal3;
816 #endif
817 
818 	for (i = 0; i < MAXEISA; i++) {
819 		if (EISAbases[i]) {	/* Still a possibility ?          */
820 
821 			base = 0x1c88 + (i * 0x1000);
822 #ifdef CHECKPAL
823 			pal1 = inb((u16) base - 8);
824 			pal2 = inb((u16) base - 7);
825 			pal3 = inb((u16) base - 6);
826 
827 			if (((pal1 == 0x12) && (pal2 == 0x14)) || ((pal1 == 0x38) && (pal2 == 0xa3) && (pal3 == 0x82)) || ((pal1 == 0x06) && (pal2 == 0x94) && (pal3 == 0x24))) {
828 				DBG(DBG_PROBE, printk(KERN_NOTICE "EISA EATA id tags found: " "%x %x %x \n", (int) pal1, (int) pal2, (int) pal3));
829 #endif
830 				if (get_pio_conf_PIO(base, buf)) {
831 					DBG(DBG_PROBE && DBG_EISA, print_pio_config(buf));
832 					if (buf->IRQ) {
833 						if (!register_pio_HBA(base, buf, NULL))
834 							release_region(base, 9);
835 					} else {
836 						printk(KERN_NOTICE "eata_dma: No valid IRQ. HBA " "removed from list\n");
837 						release_region(base, 9);
838 					}
839 				}
840 				/* Nothing found here so we take it from the list */
841 				EISAbases[i] = 0;
842 #ifdef CHECKPAL
843 			}
844 #endif
845 		}
846 	}
847 	return;
848 }
849 
find_pio_PCI(struct get_conf * buf)850 static void find_pio_PCI(struct get_conf *buf)
851 {
852 #ifndef CONFIG_PCI
853 	printk("eata_dma: kernel PCI support not enabled. Skipping scan for PCI HBAs.\n");
854 #else
855 	struct pci_dev *dev = NULL;
856 	unsigned long base, x;
857 
858 	while ((dev = pci_get_device(PCI_VENDOR_ID_DPT, PCI_DEVICE_ID_DPT, dev)) != NULL) {
859 		DBG(DBG_PROBE && DBG_PCI, printk("eata_pio: find_PCI, HBA at %s\n", pci_name(dev)));
860 		if (pci_enable_device(dev))
861 			continue;
862 		pci_set_master(dev);
863 		base = pci_resource_flags(dev, 0);
864 		if (base & IORESOURCE_MEM) {
865 			printk("eata_pio: invalid base address of device %s\n", pci_name(dev));
866 			continue;
867 		}
868 		base = pci_resource_start(dev, 0);
869 		/* EISA tag there ? */
870 		if ((inb(base) == 0x12) && (inb(base + 1) == 0x14))
871 			continue;	/* Jep, it's forced, so move on  */
872 		base += 0x10;	/* Now, THIS is the real address */
873 		if (base != 0x1f8) {
874 			/* We didn't find it in the primary search */
875 			if (get_pio_conf_PIO(base, buf)) {
876 				if (buf->FORCADR) {	/* If the address is forced */
877 					release_region(base, 9);
878 					continue;	/* we'll find it later      */
879 				}
880 
881 				/* OK. We made it till here, so we can go now
882 				 * and register it. We  only have to check and
883 				 * eventually remove it from the EISA and ISA list
884 				 */
885 
886 				if (!register_pio_HBA(base, buf, dev)) {
887 					release_region(base, 9);
888 					continue;
889 				}
890 
891 				if (base < 0x1000) {
892 					for (x = 0; x < MAXISA; ++x) {
893 						if (ISAbases[x] == base) {
894 							ISAbases[x] = 0;
895 							break;
896 						}
897 					}
898 				} else if ((base & 0x0fff) == 0x0c88) {
899 					x = (base >> 12) & 0x0f;
900 					EISAbases[x] = 0;
901 				}
902 			}
903 #ifdef CHECK_BLINK
904 			else if (check_blink_state(base)) {
905 				printk("eata_pio: HBA is in BLINK state.\n" "Consult your HBAs manual to correct this.\n");
906 			}
907 #endif
908 		}
909 	}
910 #endif				/* #ifndef CONFIG_PCI */
911 }
912 
eata_pio_detect(struct scsi_host_template * tpnt)913 static int eata_pio_detect(struct scsi_host_template *tpnt)
914 {
915 	struct Scsi_Host *HBA_ptr;
916 	struct get_conf gc;
917 	int i;
918 
919 	find_pio_PCI(&gc);
920 	find_pio_EISA(&gc);
921 	find_pio_ISA(&gc);
922 
923 	for (i = 0; i < MAXIRQ; i++)
924 		if (reg_IRQ[i])
925 			request_irq(i, do_eata_pio_int_handler, 0, "EATA-PIO", NULL);
926 
927 	HBA_ptr = first_HBA;
928 
929 	if (registered_HBAs != 0) {
930 		printk("EATA (Extended Attachment) PIO driver version: %d.%d%s\n"
931 		       "(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);
932 
933 		printk("Registered HBAs:\n");
934 		printk("HBA no. Boardtype: Revis: EATA: Bus: BaseIO: IRQ: Ch: ID: Pr:" " QS: SG: CPL:\n");
935 		for (i = 1; i <= registered_HBAs; i++) {
936 			printk("scsi%-2d: %.10s v%s 2.0%c  %s %#.4lx   %2d   %d   %d   %c"
937 			       "  %2d  %2d  %2d\n",
938 			       HBA_ptr->host_no, SD(HBA_ptr)->name, SD(HBA_ptr)->revision,
939 			       SD(HBA_ptr)->EATA_revision, (SD(HBA_ptr)->bustype == 'P') ?
940 			       "PCI " : (SD(HBA_ptr)->bustype == 'E') ? "EISA" : "ISA ",
941 			       HBA_ptr->base, HBA_ptr->irq, SD(HBA_ptr)->channel, HBA_ptr->this_id,
942 			       SD(HBA_ptr)->primary ? 'Y' : 'N', HBA_ptr->can_queue,
943 			       HBA_ptr->sg_tablesize, HBA_ptr->cmd_per_lun);
944 			HBA_ptr = SD(HBA_ptr)->next;
945 		}
946 	}
947 	return (registered_HBAs);
948 }
949 
950 static struct scsi_host_template driver_template = {
951 	.proc_name		= "eata_pio",
952 	.name              	= "EATA (Extended Attachment) PIO driver",
953 	.show_info         	= eata_pio_show_info,
954 	.detect            	= eata_pio_detect,
955 	.release           	= eata_pio_release,
956 	.queuecommand      	= eata_pio_queue,
957 	.eh_abort_handler  	= eata_pio_abort,
958 	.eh_host_reset_handler	= eata_pio_host_reset,
959 	.use_clustering    	= ENABLE_CLUSTERING,
960 };
961 
962 MODULE_AUTHOR("Michael Neuffer, Alfred Arnold");
963 MODULE_DESCRIPTION("EATA SCSI PIO driver");
964 MODULE_LICENSE("GPL");
965 
966 #include "scsi_module.c"
967