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
72static unsigned int ISAbases[MAXISA] =	{
73	 0x1F0, 0x170, 0x330, 0x230
74};
75
76static unsigned int ISAirqs[MAXISA] = {
77	14, 12, 15, 11
78};
79
80static unsigned char EISAbases[] = {
81	1, 1, 1, 1, 1, 1, 1, 1,
82	1, 1, 1, 1, 1, 1, 1, 1
83};
84
85static unsigned int registered_HBAs;
86static struct Scsi_Host *last_HBA;
87static struct Scsi_Host *first_HBA;
88static unsigned char reg_IRQ[16];
89static unsigned char reg_IRQL[16];
90static unsigned long int_counter;
91static unsigned long queue_counter;
92
93static 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 */
106static 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
138stop_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
149static 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
166static 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
180static irqreturn_t eata_pio_int_handler(int irq, void *dev_id);
181
182static 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
194static 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
320static 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
338static 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 0x%p, y %d\n", cmd, y));
376
377	cmd->scsi_done = (void *) done;
378
379	if (cmd->sc_data_direction == DMA_TO_DEVICE)
380		cp->DataOut = 1;	/* Output mode */
381	else
382		cp->DataIn = 0;	/* Input mode  */
383
384	cp->Interpret = (cmd->device->id == hd->hostid);
385	cp->cp_datalen = cpu_to_be32(scsi_bufflen(cmd));
386	cp->Auto_Req_Sen = 0;
387	cp->cp_reqDMA = 0;
388	cp->reqlen = 0;
389
390	cp->cp_id = cmd->device->id;
391	cp->cp_lun = cmd->device->lun;
392	cp->cp_dispri = 0;
393	cp->cp_identify = 1;
394	memcpy(cp->cp_cdb, cmd->cmnd, COMMAND_SIZE(*cmd->cmnd));
395
396	cp->cp_statDMA = 0;
397
398	cp->cp_viraddr = cp;
399	cp->cmd = cmd;
400	cmd->host_scribble = (char *) &hd->ccb[y];
401
402	if (!scsi_bufflen(cmd)) {
403		cmd->SCp.buffers_residual = 1;
404		cmd->SCp.ptr = NULL;
405		cmd->SCp.this_residual = 0;
406		cmd->SCp.buffer = NULL;
407	} else {
408		cmd->SCp.buffer = scsi_sglist(cmd);
409		cmd->SCp.buffers_residual = scsi_sg_count(cmd);
410		cmd->SCp.ptr = sg_virt(cmd->SCp.buffer);
411		cmd->SCp.this_residual = cmd->SCp.buffer->length;
412	}
413	cmd->SCp.Status = (cmd->SCp.this_residual != 0);	/* TRUE as long as bytes
414								 * are to transfer */
415
416	if (eata_pio_send_command(base, EATA_CMD_PIO_SEND_CP)) {
417		cmd->result = DID_BUS_BUSY << 16;
418		scmd_printk(KERN_NOTICE, cmd,
419			"eata_pio_queue pid 0x%p, HBA busy, "
420			"returning DID_BUS_BUSY, done.\n", cmd);
421		done(cmd);
422		cp->status = FREE;
423		return 0;
424	}
425	/* FIXME: timeout */
426	while (!(inb(base + HA_RSTATUS) & HA_SDRQ))
427		cpu_relax();
428	outsw(base + HA_RDATA, cp, hd->cplen);
429	outb(EATA_CMD_PIO_TRUNC, base + HA_WCOMMAND);
430	for (x = 0; x < hd->cppadlen; x++)
431		outw(0, base + HA_RDATA);
432
433	DBG(DBG_QUEUE, scmd_printk(KERN_DEBUG, cmd,
434		"Queued base %#.4lx cmd: 0x%p "
435		"slot %d irq %d\n", sh->base, cmd, y, sh->irq));
436
437	return 0;
438}
439
440static DEF_SCSI_QCMD(eata_pio_queue)
441
442static int eata_pio_abort(struct scsi_cmnd *cmd)
443{
444	unsigned int loop = 100;
445
446	DBG(DBG_ABNORM, scmd_printk(KERN_WARNING, cmd,
447		"eata_pio_abort called pid: 0x%p\n", cmd));
448
449	while (inb(cmd->device->host->base + HA_RAUXSTAT) & HA_ABUSY)
450		if (--loop == 0) {
451			printk(KERN_WARNING "eata_pio: abort, timeout error.\n");
452			return FAILED;
453		}
454	if (CD(cmd)->status == FREE) {
455		DBG(DBG_ABNORM, printk(KERN_WARNING "Returning: SCSI_ABORT_NOT_RUNNING\n"));
456		return FAILED;
457	}
458	if (CD(cmd)->status == USED) {
459		DBG(DBG_ABNORM, printk(KERN_WARNING "Returning: SCSI_ABORT_BUSY\n"));
460		/* We want to sleep a bit more here */
461		return FAILED;		/* SNOOZE */
462	}
463	if (CD(cmd)->status == RESET) {
464		printk(KERN_WARNING "eata_pio: abort, command reset error.\n");
465		return FAILED;
466	}
467	if (CD(cmd)->status == LOCKED) {
468		DBG(DBG_ABNORM, printk(KERN_WARNING "eata_pio: abort, queue slot " "locked.\n"));
469		return FAILED;
470	}
471	panic("eata_pio: abort: invalid slot status\n");
472}
473
474static int eata_pio_host_reset(struct scsi_cmnd *cmd)
475{
476	unsigned int x, limit = 0;
477	unsigned char success = 0;
478	struct scsi_cmnd *sp;
479	struct Scsi_Host *host = cmd->device->host;
480
481	DBG(DBG_ABNORM, scmd_printk(KERN_WARNING, cmd,
482		"eata_pio_reset called\n"));
483
484	spin_lock_irq(host->host_lock);
485
486	if (HD(cmd)->state == RESET) {
487		printk(KERN_WARNING "eata_pio_reset: exit, already in reset.\n");
488		spin_unlock_irq(host->host_lock);
489		return FAILED;
490	}
491
492	/* force all slots to be free */
493
494	for (x = 0; x < cmd->device->host->can_queue; x++) {
495
496		if (HD(cmd)->ccb[x].status == FREE)
497			continue;
498
499		sp = HD(cmd)->ccb[x].cmd;
500		HD(cmd)->ccb[x].status = RESET;
501		printk(KERN_WARNING "eata_pio_reset: slot %d in reset.\n", x);
502
503		if (sp == NULL)
504			panic("eata_pio_reset: slot %d, sp==NULL.\n", x);
505	}
506
507	/* hard reset the HBA  */
508	outb(EATA_CMD_RESET, cmd->device->host->base + HA_WCOMMAND);
509
510	DBG(DBG_ABNORM, printk(KERN_WARNING "eata_pio_reset: board reset done.\n"));
511	HD(cmd)->state = RESET;
512
513	spin_unlock_irq(host->host_lock);
514	msleep(3000);
515	spin_lock_irq(host->host_lock);
516
517	DBG(DBG_ABNORM, printk(KERN_WARNING "eata_pio_reset: interrupts disabled, " "loops %d.\n", limit));
518
519	for (x = 0; x < cmd->device->host->can_queue; x++) {
520
521		/* Skip slots already set free by interrupt */
522		if (HD(cmd)->ccb[x].status != RESET)
523			continue;
524
525		sp = HD(cmd)->ccb[x].cmd;
526		sp->result = DID_RESET << 16;
527
528		/* This mailbox is terminated */
529		printk(KERN_WARNING "eata_pio_reset: reset ccb %d.\n", x);
530		HD(cmd)->ccb[x].status = FREE;
531
532		sp->scsi_done(sp);
533	}
534
535	HD(cmd)->state = 0;
536
537	spin_unlock_irq(host->host_lock);
538
539	if (success) {		/* hmmm... */
540		DBG(DBG_ABNORM, printk(KERN_WARNING "eata_pio_reset: exit, success.\n"));
541		return SUCCESS;
542	} else {
543		DBG(DBG_ABNORM, printk(KERN_WARNING "eata_pio_reset: exit, wakeup.\n"));
544		return FAILED;
545	}
546}
547
548static char *get_pio_board_data(unsigned long base, unsigned int irq, unsigned int id, unsigned long cplen, unsigned short cppadlen)
549{
550	struct eata_ccb cp;
551	static char buff[256];
552	int z;
553
554	memset(&cp, 0, sizeof(struct eata_ccb));
555	memset(buff, 0, sizeof(buff));
556
557	cp.DataIn = 1;
558	cp.Interpret = 1;	/* Interpret command */
559
560	cp.cp_datalen = cpu_to_be32(254);
561	cp.cp_dataDMA = cpu_to_be32(0);
562
563	cp.cp_id = id;
564	cp.cp_lun = 0;
565
566	cp.cp_cdb[0] = INQUIRY;
567	cp.cp_cdb[1] = 0;
568	cp.cp_cdb[2] = 0;
569	cp.cp_cdb[3] = 0;
570	cp.cp_cdb[4] = 254;
571	cp.cp_cdb[5] = 0;
572
573	if (eata_pio_send_command(base, EATA_CMD_PIO_SEND_CP))
574		return NULL;
575
576	while (!(inb(base + HA_RSTATUS) & HA_SDRQ))
577		cpu_relax();
578
579	outsw(base + HA_RDATA, &cp, cplen);
580	outb(EATA_CMD_PIO_TRUNC, base + HA_WCOMMAND);
581	for (z = 0; z < cppadlen; z++)
582		outw(0, base + HA_RDATA);
583
584	while (inb(base + HA_RSTATUS) & HA_SBUSY)
585		cpu_relax();
586
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
599static int get_pio_conf_PIO(unsigned long 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 %#lx\n", base));
615	eata_pio_send_command(base, EATA_CMD_PIO_READ_CONFIG);
616
617	loop = 50;
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 = 50;
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 %lx\n", base));
629		goto fail;
630	}
631
632	if (cpu_to_be32(EATA_SIGNATURE) != buf->signature)
633		goto fail;
634
635	DBG(DBG_PIO && DBG_PROBE, printk(KERN_NOTICE "EATA Controller found "
636				"at %#4lx EATA Level: %x\n",
637				base, (unsigned int) (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
657static 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", be32_to_cpu(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], be16_to_cpu(gc->queuesiz), be16_to_cpu(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
665static unsigned int print_selftest(unsigned int 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
692static int register_pio_HBA(long base, struct get_conf *gc, struct pci_dev *pdev)
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(base, gc->IRQ, gc->scsi_id[3], cplen = (cpu_to_be32(gc->cplen) + 1) / 2, cppadlen = (cpu_to_be16(gc->cppadlen) + 1) / 2)) == NULL) {
710		printk("HBA at %#lx didn't react on INQUIRY. Sorry.\n", 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", base);
716		return 0;
717	}
718
719	size = sizeof(hostdata) + (sizeof(struct eata_ccb) * be16_to_cpu(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, IRQF_DISABLED, "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) * be16_to_cpu(gc->queuesiz)));
745	memset(hd->reads, 0, sizeof(hd->reads));
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 (be32_to_cpu(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 (be32_to_cpu(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	hd->pdev = pci_dev_get(pdev);	/* Keep a PCI reference */
807
808	sh->max_id = 8;
809	sh->max_lun = 8;
810
811	if (gc->SECOND)
812		hd->primary = 0;
813	else
814		hd->primary = 1;
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
827static 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, NULL))
837			release_region(ISAbases[i], 9);
838		else
839			ISAbases[i] = 0;
840	}
841	return;
842}
843
844static 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, NULL))
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
885static 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	unsigned long base, x;
892
893	while ((dev = pci_get_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, dev)) {
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
948static 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, IRQF_DISABLED, "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 %#.4lx   %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			       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
985static 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
997MODULE_AUTHOR("Michael Neuffer, Alfred Arnold");
998MODULE_DESCRIPTION("EATA SCSI PIO driver");
999MODULE_LICENSE("GPL");
1000
1001#include "scsi_module.c"
1002