summaryrefslogtreecommitdiffstats
path: root/drivers/scsi/pcmcia/sym53c500_cs.c
blob: 0be232b58ffb795e5d878f3aa400eee8dab5b673 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
/*
*  sym53c500_cs.c	Bob Tracy (rct@frus.com)
*
*  A rewrite of the pcmcia-cs add-on driver for newer (circa 1997)
*  New Media Bus Toaster PCMCIA SCSI cards using the Symbios Logic
*  53c500 controller: intended for use with 2.6 and later kernels.
*  The pcmcia-cs add-on version of this driver is not supported
*  beyond 2.4.  It consisted of three files with history/copyright
*  information as follows:
*
*  SYM53C500.h
*	Bob Tracy (rct@frus.com)
*	Original by Tom Corner (tcorner@via.at).
*	Adapted from NCR53c406a.h which is Copyrighted (C) 1994
*	Normunds Saumanis (normunds@rx.tech.swh.lv)
*
*  SYM53C500.c
*	Bob Tracy (rct@frus.com)
*	Original driver by Tom Corner (tcorner@via.at) was adapted
*	from NCR53c406a.c which is Copyrighted (C) 1994, 1995, 1996 
*	Normunds Saumanis (normunds@fi.ibm.com)
*
*  sym53c500.c
*	Bob Tracy (rct@frus.com)
*	Original by Tom Corner (tcorner@via.at) was adapted from a
*	driver for the Qlogic SCSI card written by
*	David Hinds (dhinds@allegro.stanford.edu).
* 
*  This program is free software; you can redistribute it and/or modify it
*  under the terms of the GNU General Public License as published by the
*  Free Software Foundation; either version 2, or (at your option) any
*  later version.
*
*  This program is distributed in the hope that it will be useful, but
*  WITHOUT ANY WARRANTY; without even the implied warranty of
*  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
*  General Public License for more details.
*/

#define SYM53C500_DEBUG 0
#define VERBOSE_SYM53C500_DEBUG 0

/*
*  Set this to 0 if you encounter kernel lockups while transferring 
*  data in PIO mode.  Note this can be changed via "sysfs".
*/
#define USE_FAST_PIO 1

/* =============== End of user configurable parameters ============== */

#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/errno.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/string.h>
#include <linux/ioport.h>
#include <linux/blkdev.h>
#include <linux/spinlock.h>
#include <linux/bitops.h>

#include <asm/io.h>
#include <asm/dma.h>
#include <asm/irq.h>

#include <scsi/scsi_ioctl.h>
#include <scsi/scsi_cmnd.h>
#include <scsi/scsi_device.h>
#include <scsi/scsi.h>
#include <scsi/scsi_host.h>

#include <pcmcia/cs_types.h>
#include <pcmcia/cs.h>
#include <pcmcia/cistpl.h>
#include <pcmcia/ds.h>
#include <pcmcia/ciscode.h>

/* ================================================================== */

#ifdef PCMCIA_DEBUG
static int pc_debug = PCMCIA_DEBUG;
module_param(pc_debug, int, 0);
#define DEBUG(n, args...) if (pc_debug>(n)) printk(KERN_DEBUG args)
static char *version =
"sym53c500_cs.c 0.9c 2004/10/27 (Bob Tracy)";
#else
#define DEBUG(n, args...)
#endif

/* ================================================================== */

#define SYNC_MODE 0 		/* Synchronous transfer mode */

/* Default configuration */
#define C1_IMG   0x07		/* ID=7 */
#define C2_IMG   0x48		/* FE SCSI2 */
#define C3_IMG   0x20		/* CDB */
#define C4_IMG   0x04		/* ANE */
#define C5_IMG   0xa4		/* ? changed from b6= AA PI SIE POL */
#define C7_IMG   0x80		/* added for SYM53C500 t. corner */

/* Hardware Registers: offsets from io_port (base) */

/* Control Register Set 0 */
#define TC_LSB		0x00		/* transfer counter lsb */
#define TC_MSB		0x01		/* transfer counter msb */
#define SCSI_FIFO	0x02		/* scsi fifo register */
#define CMD_REG		0x03		/* command register */
#define STAT_REG	0x04		/* status register */
#define DEST_ID		0x04		/* selection/reselection bus id */
#define INT_REG		0x05		/* interrupt status register */
#define SRTIMOUT	0x05		/* select/reselect timeout reg */
#define SEQ_REG		0x06		/* sequence step register */
#define SYNCPRD		0x06		/* synchronous transfer period */
#define FIFO_FLAGS	0x07		/* indicates # of bytes in fifo */
#define SYNCOFF		0x07		/* synchronous offset register */
#define CONFIG1		0x08		/* configuration register */
#define CLKCONV		0x09		/* clock conversion register */
/* #define TESTREG	0x0A */		/* test mode register */
#define CONFIG2		0x0B		/* configuration 2 register */
#define CONFIG3		0x0C		/* configuration 3 register */
#define CONFIG4		0x0D		/* configuration 4 register */
#define TC_HIGH		0x0E		/* transfer counter high */
/* #define FIFO_BOTTOM	0x0F */		/* reserve FIFO byte register */

/* Control Register Set 1 */
/* #define JUMPER_SENSE	0x00 */		/* jumper sense port reg (r/w) */
/* #define SRAM_PTR	0x01 */		/* SRAM address pointer reg (r/w) */
/* #define SRAM_DATA	0x02 */		/* SRAM data register (r/w) */
#define PIO_FIFO	0x04		/* PIO FIFO registers (r/w) */
/* #define PIO_FIFO1	0x05 */		/*  */
/* #define PIO_FIFO2	0x06 */		/*  */
/* #define PIO_FIFO3	0x07 */		/*  */
#define PIO_STATUS	0x08		/* PIO status (r/w) */
/* #define ATA_CMD	0x09 */		/* ATA command/status reg (r/w) */
/* #define ATA_ERR	0x0A */		/* ATA features/error reg (r/w) */
#define PIO_FLAG	0x0B		/* PIO flag interrupt enable (r/w) */
#define CONFIG5		0x09		/* configuration 5 register */
/* #define SIGNATURE	0x0E */		/* signature register (r) */
/* #define CONFIG6	0x0F */		/* configuration 6 register (r) */
#define CONFIG7		0x0d

/* select register set 0 */
#define REG0(x)		(outb(C4_IMG, (x) + CONFIG4))
/* select register set 1 */
#define REG1(x)		outb(C7_IMG, (x) + CONFIG7); outb(C5_IMG, (x) + CONFIG5)

#if SYM53C500_DEBUG
#define DEB(x) x
#else
#define DEB(x)
#endif

#if VERBOSE_SYM53C500_DEBUG
#define VDEB(x) x
#else
#define VDEB(x)
#endif

#define LOAD_DMA_COUNT(x, count) \
  outb(count & 0xff, (x) + TC_LSB); \
  outb((count >> 8) & 0xff, (x) + TC_MSB); \
  outb((count >> 16) & 0xff, (x) + TC_HIGH);

/* Chip commands */
#define DMA_OP               0x80

#define SCSI_NOP             0x00
#define FLUSH_FIFO           0x01
#define CHIP_RESET           0x02
#define SCSI_RESET           0x03
#define RESELECT             0x40
#define SELECT_NO_ATN        0x41
#define SELECT_ATN           0x42
#define SELECT_ATN_STOP      0x43
#define ENABLE_SEL           0x44
#define DISABLE_SEL          0x45
#define SELECT_ATN3          0x46
#define RESELECT3            0x47
#define TRANSFER_INFO        0x10
#define INIT_CMD_COMPLETE    0x11
#define MSG_ACCEPT           0x12
#define TRANSFER_PAD         0x18
#define SET_ATN              0x1a
#define RESET_ATN            0x1b
#define SEND_MSG             0x20
#define SEND_STATUS          0x21
#define SEND_DATA            0x22
#define DISCONN_SEQ          0x23
#define TERMINATE_SEQ        0x24
#define TARG_CMD_COMPLETE    0x25
#define DISCONN              0x27
#define RECV_MSG             0x28
#define RECV_CMD             0x29
#define RECV_DATA            0x2a
#define RECV_CMD_SEQ         0x2b
#define TARGET_ABORT_DMA     0x04

/* ================================================================== */

struct scsi_info_t {
	struct pcmcia_device	*p_dev;
	dev_node_t node;
	struct Scsi_Host *host;
	unsigned short manf_id;
};

/*
*  Repository for per-instance host data.
*/
struct sym53c500_data {
	struct scsi_cmnd *current_SC;
	int fast_pio;
};

enum Phase {
    idle,
    data_out,
    data_in,
    command_ph,
    status_ph,
    message_out,
    message_in
};

/* ================================================================== */

static void
chip_init(int io_port)
{
	REG1(io_port);
	outb(0x01, io_port + PIO_STATUS);
	outb(0x00, io_port + PIO_FLAG);

	outb(C4_IMG, io_port + CONFIG4);	/* REG0(io_port); */
	outb(C3_IMG, io_port + CONFIG3);
	outb(C2_IMG, io_port + CONFIG2);
	outb(C1_IMG, io_port + CONFIG1);

	outb(0x05, io_port + CLKCONV);	/* clock conversion factor */
	outb(0x9C, io_port + SRTIMOUT);	/* Selection timeout */
	outb(0x05, io_port + SYNCPRD);	/* Synchronous transfer period */
	outb(SYNC_MODE, io_port + SYNCOFF);	/* synchronous mode */  
}

static void
SYM53C500_int_host_reset(int io_port)
{
	outb(C4_IMG, io_port + CONFIG4);	/* REG0(io_port); */
	outb(CHIP_RESET, io_port + CMD_REG);
	outb(SCSI_NOP, io_port + CMD_REG);	/* required after reset */
	outb(SCSI_RESET, io_port + CMD_REG);
	chip_init(io_port);
}

static __inline__ int
SYM53C500_pio_read(int fast_pio, int base, unsigned char *request, unsigned int reqlen)
{
	int i;
	int len;	/* current scsi fifo size */

	REG1(base);
	while (reqlen) {
		i = inb(base + PIO_STATUS);
		/* VDEB(printk("pio_status=%x\n", i)); */
		if (i & 0x80) 
			return 0;

		switch (i & 0x1e) {
		default:
		case 0x10:	/* fifo empty */
			len = 0;
			break;
		case 0x0:
			len = 1;
			break; 
		case 0x8:	/* fifo 1/3 full */
			len = 42;
			break;
		case 0xc:	/* fifo 2/3 full */
			len = 84;
			break;
		case 0xe:	/* fifo full */
			len = 128;
			break;
		}

		if ((i & 0x40) && len == 0) { /* fifo empty and interrupt occurred */
			return 0;
		}

		if (len) {
			if (len > reqlen) 
				len = reqlen;

			if (fast_pio && len > 3) {
				insl(base + PIO_FIFO, request, len >> 2);
				request += len & 0xfc; 
				reqlen -= len & 0xfc; 
			} else {
				while (len--) {
					*request++ = inb(base + PIO_FIFO);
					reqlen--;
				}
			} 
		}
	}
	return 0;
}

static __inline__ int
SYM53C500_pio_write(int fast_pio, int base, unsigned char *request, unsigned int reqlen)
{
	int i = 0;
	int len;	/* current scsi fifo size */

	REG1(base);
	while (reqlen && !(i & 0x40)) {
		i = inb(base + PIO_STATUS);
		/* VDEB(printk("pio_status=%x\n", i)); */
		if (i & 0x80)	/* error */
			return 0;

		switch (i & 0x1e) {
		case 0x10:
			len = 128;
			break;
		case 0x0:
			len = 84;
			break;
		case 0x8:
			len = 42;
			break;
		case 0xc:
			len = 1;
			break;
		default:
		case 0xe:
			len = 0;
			break;
		}

		if (len) {
			if (len > reqlen)
				len = reqlen;

			if (fast_pio && len > 3) {
				outsl(base + PIO_FIFO, request, len >> 2);
				request += len & 0xfc;
				reqlen -= len & 0xfc;
			} else {
				while (len--) {
					outb(*request++, base + PIO_FIFO);
					reqlen--;
				}
			}
		}
	}
	return 0;
}

static irqreturn_t
SYM53C500_intr(int irq, void *dev_id)
{
	unsigned long flags;
	struct Scsi_Host *dev = dev_id;
	DEB(unsigned char fifo_size;)
	DEB(unsigned char seq_reg;)
	unsigned char status, int_reg;
	unsigned char pio_status;
	int port_base = dev->io_port;
	struct sym53c500_data *data =
	    (struct sym53c500_data *)dev->hostdata;
	struct scsi_cmnd *curSC = data->current_SC;
	int fast_pio = data->fast_pio;

	spin_lock_irqsave(dev->host_lock, flags);

	VDEB(printk("SYM53C500_intr called\n"));

	REG1(port_base);
	pio_status = inb(port_base + PIO_STATUS);
	REG0(port_base);
	status = inb(port_base + STAT_REG);
	DEB(seq_reg = inb(port_base + SEQ_REG));
	int_reg = inb(port_base + INT_REG);
	DEB(fifo_size = inb(port_base + FIFO_FLAGS) & 0x1f);

#if SYM53C500_DEBUG
	printk("status=%02x, seq_reg=%02x, int_reg=%02x, fifo_size=%02x", 
	    status, seq_reg, int_reg, fifo_size);
	printk(", pio=%02x\n", pio_status);
#endif /* SYM53C500_DEBUG */

	if (int_reg & 0x80) {	/* SCSI reset intr */
		DEB(printk("SYM53C500: reset intr received\n"));
		curSC->result = DID_RESET << 16;
		goto idle_out;
	}

	if (pio_status & 0x80) {
		printk("SYM53C500: Warning: PIO error!\n");
		curSC->result = DID_ERROR << 16;
		goto idle_out;
	}

	if (status & 0x20) {		/* Parity error */
		printk("SYM53C500: Warning: parity error!\n");
		curSC->result = DID_PARITY << 16;
		goto idle_out;
	}

	if (status & 0x40) {		/* Gross error */
		printk("SYM53C500: Warning: gross error!\n");
		curSC->result = DID_ERROR << 16;
		goto idle_out;
	}

	if (int_reg & 0x20) {		/* Disconnect */
		DEB(printk("SYM53C500: disconnect intr received\n"));
		if (curSC->SCp.phase != message_in) {	/* Unexpected disconnect */
			curSC->result = DID_NO_CONNECT << 16;
		} else {	/* Command complete, return status and message */
			curSC->result = (curSC->SCp.Status & 0xff)
			    | ((curSC->SCp.Message & 0xff) << 8) | (DID_OK << 16);
		}
		goto idle_out;
	}

	switch (status & 0x07) {	/* scsi phase */
	case 0x00:			/* DATA-OUT */
		if (int_reg & 0x10) {	/* Target requesting info transfer */
			struct scatterlist *sg;
			int i;

			curSC->SCp.phase = data_out;
			VDEB(printk("SYM53C500: Data-Out phase\n"));
			outb(FLUSH_FIFO, port_base + CMD_REG);
			LOAD_DMA_COUNT(port_base, scsi_bufflen(curSC));	/* Max transfer size */
			outb(TRANSFER_INFO | DMA_OP, port_base + CMD_REG);

			scsi_for_each_sg(curSC, sg, scsi_sg_count(curSC), i) {
				SYM53C500_pio_write(fast_pio, port_base,
				    sg_virt(sg), sg->length);
			}
			REG0(port_base);
		}
		break;

	case 0x01:		/* DATA-IN */
		if (int_reg & 0x10) {	/* Target requesting info transfer */
			struct scatterlist *sg;
			int i;

			curSC->SCp.phase = data_in;
			VDEB(printk("SYM53C500: Data-In phase\n"));
			outb(FLUSH_FIFO, port_base + CMD_REG);
			LOAD_DMA_COUNT(port_base, scsi_bufflen(curSC));	/* Max transfer size */
			outb(TRANSFER_INFO | DMA_OP, port_base + CMD_REG);

			scsi_for_each_sg(curSC, sg, scsi_sg_count(curSC), i) {
				SYM53C500_pio_read(fast_pio, port_base,
					sg_virt(sg), sg->length);
			}
			REG0(port_base);
		}
		break;

	case 0x02:		/* COMMAND */
		curSC->SCp.phase = command_ph;
		printk("SYM53C500: Warning: Unknown interrupt occurred in command phase!\n");
		break;

	case 0x03:		/* STATUS */
		curSC->SCp.phase = status_ph;
		VDEB(printk("SYM53C500: Status phase\n"));
		outb(FLUSH_FIFO, port_base + CMD_REG);
		outb(INIT_CMD_COMPLETE, port_base + CMD_REG);
		break;

	case 0x04:		/* Reserved */
	case 0x05:		/* Reserved */
		printk("SYM53C500: WARNING: Reserved phase!!!\n");
		break;

	case 0x06:		/* MESSAGE-OUT */
		DEB(printk("SYM53C500: Message-Out phase\n"));
		curSC->SCp.phase = message_out;
		outb(SET_ATN, port_base + CMD_REG);	/* Reject the message */
		outb(MSG_ACCEPT, port_base + CMD_REG);
		break;

	case 0x07:		/* MESSAGE-IN */
		VDEB(printk("SYM53C500: Message-In phase\n"));
		curSC->SCp.phase = message_in;

		curSC->SCp.Status = inb(port_base + SCSI_FIFO);
		curSC->SCp.Message = inb(port_base + SCSI_FIFO);

		VDEB(printk("SCSI FIFO size=%d\n", inb(port_base + FIFO_FLAGS) & 0x1f));
		DEB(printk("Status = %02x  Message = %02x\n", curSC->SCp.Status, curSC->SCp.Message));

		if (curSC->SCp.Message == SAVE_POINTERS || curSC->SCp.Message == DISCONNECT) {
			outb(SET_ATN, port_base + CMD_REG);	/* Reject message */
			DEB(printk("Discarding SAVE_POINTERS message\n"));
		}
		outb(MSG_ACCEPT, port_base + CMD_REG);
		break;
	}
out:
	spin_unlock_irqrestore(dev->host_lock, flags);
	return IRQ_HANDLED;

idle_out:
	curSC->SCp.phase = idle;
	curSC->scsi_done(curSC);
	goto out;
}

static void
SYM53C500_release(struct pcmcia_device *link)
{
	struct scsi_info_t *info = link->priv;
	struct Scsi_Host *shost = info->host;

	DEBUG(0, "SYM53C500_release(0x%p)\n", link);

	/*
	*  Do this before releasing/freeing resources.
	*/
	scsi_remove_host(shost);

	/*
	*  Interrupts getting hosed on card removal.  Try
	*  the following code, mostly from qlogicfas.c.
	*/
	if (shost->irq)
		free_irq(shost->irq, shost);
	if (shost->io_port && shost->n_io_port)
		release_region(shost->io_port, shost->n_io_port);

	pcmcia_disable_device(link);

	scsi_host_put(shost);
} /* SYM53C500_release */

static const char*
SYM53C500_info(struct Scsi_Host *SChost)
{
	static char info_msg[256];
	struct sym53c500_data *data =
	    (struct sym53c500_data *)SChost->hostdata;

	DEB(printk("SYM53C500_info called\n"));
	(void)snprintf(info_msg, sizeof(info_msg),
	    "SYM53C500 at 0x%lx, IRQ %d, %s PIO mode.", 
	    SChost->io_port, SChost->irq, data->fast_pio ? "fast" : "slow");
	return (info_msg);
}

static int 
SYM53C500_queue(struct scsi_cmnd *SCpnt, void (*done)(struct scsi_cmnd *))
{
	int i;
	int port_base = SCpnt->device->host->io_port;
	struct sym53c500_data *data =
	    (struct sym53c500_data *)SCpnt->device->host->hostdata;

	VDEB(printk("SYM53C500_queue called\n"));

	DEB(printk("cmd=%02x, cmd_len=%02x, target=%02x, lun=%02x, bufflen=%d\n", 
	    SCpnt->cmnd[0], SCpnt->cmd_len, SCpnt->device->id, 
	    SCpnt->device->lun,  scsi_bufflen(SCpnt)));

	VDEB(for (i = 0; i < SCpnt->cmd_len; i++)
	    printk("cmd[%d]=%02x  ", i, SCpnt->cmnd[i]));
	VDEB(printk("\n"));

	data->current_SC = SCpnt;
	data->current_SC->scsi_done = done;
	data->current_SC->SCp.phase = command_ph;
	data->current_SC->SCp.Status = 0;
	data->current_SC->SCp.Message = 0;

	/* We are locked here already by the mid layer */
	REG0(port_base);
	outb(scmd_id(SCpnt), port_base + DEST_ID);	/* set destination */
	outb(FLUSH_FIFO, port_base + CMD_REG);	/* reset the fifos */

	for (i = 0; i < SCpnt->cmd_len; i++) {
		outb(SCpnt->cmnd[i], port_base + SCSI_FIFO);
	}
	outb(SELECT_NO_ATN, port_base + CMD_REG);

	return 0;
}

static int 
SYM53C500_host_reset(struct scsi_cmnd *SCpnt)
{
	int port_base = SCpnt->device->host->io_port;

	DEB(printk("SYM53C500_host_reset called\n"));
	spin_lock_irq(SCpnt->device->host->host_lock);
	SYM53C500_int_host_reset(port_base);
	spin_unlock_irq(SCpnt->device->host->host_lock);

	return SUCCESS;
}

static int 
SYM53C500_biosparm(struct scsi_device *disk,
    struct block_device *dev,
    sector_t capacity, int *info_array)
{
	int size;

	DEB(printk("SYM53C500_biosparm called\n"));

	size = capacity;
	info_array[0] = 64;		/* heads */
	info_array[1] = 32;		/* sectors */
	info_array[2] = size >> 11;	/* cylinders */
	if (info_array[2] > 1024) {	/* big disk */
		info_array[0] = 255;
		info_array[1] = 63;
		info_array[2] = size / (255 * 63);
	}
	return 0;
}

static ssize_t
SYM53C500_show_pio(struct device *dev, struct device_attribute *attr,
		   char *buf)
{
	struct Scsi_Host *SHp = class_to_shost(dev);
	struct sym53c500_data *data =
	    (struct sym53c500_data *)SHp->hostdata;

	return snprintf(buf, 4, "%d\n", data->fast_pio);
}

static ssize_t
SYM53C500_store_pio(struct device *dev, struct device_attribute *attr,
		    const char *buf, size_t count)
{
	int pio;
	struct Scsi_Host *SHp = class_to_shost(dev);
	struct sym53c500_data *data =
	    (struct sym53c500_data *)SHp->hostdata;

	pio = simple_strtoul(buf, NULL, 0);
	if (pio == 0 || pio == 1) {
		data->fast_pio = pio;
		return count;
	}
	else
		return -EINVAL;
}

/*
*  SCSI HBA device attributes we want to
*  make available via sysfs.
*/
static struct device_attribute SYM53C500_pio_attr = {
	.attr = {
		.name = "fast_pio",
		.mode = (S_IRUGO | S_IWUSR),
	},
	.show = SYM53C500_show_pio,
	.store = SYM53C500_store_pio,
};

static struct device_attribute *SYM53C500_shost_attrs[] = {
	&SYM53C500_pio_attr,
	NULL,
};

/*
*  scsi_host_template initializer
*/
static struct scsi_host_template sym53c500_driver_template = {
     .module			= THIS_MODULE,
     .name			= "SYM53C500",
     .info			= SYM53C500_info,
     .queuecommand		= SYM53C500_queue,
     .eh_host_reset_handler	= SYM53C500_host_reset,
     .bios_param		= SYM53C500_biosparm,
     .proc_name			= "SYM53C500",
     .can_queue			= 1,
     .this_id			= 7,
     .sg_tablesize		= 32,
     .cmd_per_lun		= 1,
     .use_clustering		= ENABLE_CLUSTERING,
     .shost_attrs		= SYM53C500_shost_attrs
};

#define CS_CHECK(fn, ret) \
do { last_fn = (fn); if ((last_ret = (ret)) != 0) goto cs_failed; } while (0)

static int
SYM53C500_config(struct pcmcia_device *link)
{
	struct scsi_info_t *info = link->priv;
	tuple_t tuple;
	cisparse_t parse;
	int i, last_ret, last_fn;
	int irq_level, port_base;
	unsigned short tuple_data[32];
	struct Scsi_Host *host;
	struct scsi_host_template *tpnt = &sym53c500_driver_template;
	struct sym53c500_data *data;

	DEBUG(0, "SYM53C500_config(0x%p)\n", link);

	info->manf_id = link->manf_id;

	tuple.TupleData = (cisdata_t *)tuple_data;
	tuple.TupleDataMax = 64;
	tuple.TupleOffset = 0;

	tuple.DesiredTuple = CISTPL_CFTABLE_ENTRY;
	CS_CHECK(GetFirstTuple, pcmcia_get_first_tuple(link, &tuple));
	while (1) {
		if (pcmcia_get_tuple_data(link, &tuple) != 0 ||
		    pcmcia_parse_tuple(link, &tuple, &parse) != 0)
			goto next_entry;
		link->conf.ConfigIndex = parse.cftable_entry.index;
		link->io.BasePort1 = parse.cftable_entry.io.win[0].base;
		link->io.NumPorts1 = parse.cftable_entry.io.win[0].len;

		if (link->io.BasePort1 != 0) {
			i = pcmcia_request_io(link, &link->io);
			if (i == CS_SUCCESS)
				break;
		}
next_entry:
		CS_CHECK(GetNextTuple, pcmcia_get_next_tuple(link, &tuple));
	}

	CS_CHECK(RequestIRQ, pcmcia_request_irq(link, &link->irq));
	CS_CHECK(RequestConfiguration, pcmcia_request_configuration(link, &link->conf));

	/*
	*  That's the trouble with copying liberally from another driver.
	*  Some things probably aren't relevant, and I suspect this entire
	*  section dealing with manufacturer IDs can be scrapped.	--rct
	*/
	if ((info->manf_id == MANFID_MACNICA) ||
	    (info->manf_id == MANFID_PIONEER) ||
	    (info->manf_id == 0x0098)) {
		/* set ATAcmd */
		outb(0xb4, link->io.BasePort1 + 0xd);
		outb(0x24, link->io.BasePort1 + 0x9);
		outb(0x04, link->io.BasePort1 + 0xd);
	}

	/*
	*  irq_level == 0 implies tpnt->can_queue == 0, which
	*  is not supported in 2.6.  Thus, only irq_level > 0
	*  will be allowed.
	*
	*  Possible port_base values are as follows:
	*
	*	0x130, 0x230, 0x280, 0x290,
	*	0x320, 0x330, 0x340, 0x350
	*/
	port_base = link->io.BasePort1;
	irq_level = link->irq.AssignedIRQ;

	DEB(printk("SYM53C500: port_base=0x%x, irq=%d, fast_pio=%d\n",
	    port_base, irq_level, USE_FAST_PIO);)

	chip_init(port_base);

	host = scsi_host_alloc(tpnt, sizeof(struct sym53c500_data));
	if (!host) {
		printk("SYM53C500: Unable to register host, giving up.\n");
		goto err_release;
	}

	data = (struct sym53c500_data *)host->hostdata;

	if (irq_level > 0) {
		if (request_irq(irq_level, SYM53C500_intr, IRQF_SHARED, "SYM53C500", host)) {
			printk("SYM53C500: unable to allocate IRQ %d\n", irq_level);
			goto err_free_scsi;
		}
		DEB(printk("SYM53C500: allocated IRQ %d\n", irq_level));
	} else if (irq_level == 0) {
		DEB(printk("SYM53C500: No interrupts detected\n"));
		goto err_free_scsi;
	} else {
		DEB(printk("SYM53C500: Shouldn't get here!\n"));
		goto err_free_scsi;
	}

	host->unique_id = port_base;
	host->irq = irq_level;
	host->io_port = port_base;
	host->n_io_port = 0x10;
	host->dma_channel = -1;

	/*
	*  Note fast_pio is set to USE_FAST_PIO by
	*  default, but can be changed via "sysfs".
	*/
	data->fast_pio = USE_FAST_PIO;

	sprintf(info->node.dev_name, "scsi%d", host->host_no);
	link->dev_node = &info->node;
	info->host = host;

	if (scsi_add_host(host, NULL))
		goto err_free_irq;

	scsi_scan_host(host);

	return 0;

err_free_irq:
	free_irq(irq_level, host);
err_free_scsi:
	scsi_host_put(host);
err_release:
	release_region(port_base, 0x10);
	printk(KERN_INFO "sym53c500_cs: no SCSI devices found\n");
	return -ENODEV;

cs_failed:
	cs_error(link, last_fn, last_ret);
	SYM53C500_release(link);
	return -ENODEV;
} /* SYM53C500_config */

static int sym53c500_resume(struct pcmcia_device *link)
{
	struct scsi_info_t *info = link->priv;

	/* See earlier comment about manufacturer IDs. */
	if ((info->manf_id == MANFID_MACNICA) ||
	    (info->manf_id == MANFID_PIONEER) ||
	    (info->manf_id == 0x0098)) {
		outb(0x80, link->io.BasePort1 + 0xd);
		outb(0x24, link->io.BasePort1 + 0x9);
		outb(0x04, link->io.BasePort1 + 0xd);
	}
	/*
	 *  If things don't work after a "resume",
	 *  this is a good place to start looking.
	 */
	SYM53C500_int_host_reset(link->io.BasePort1);

	return 0;
}

static void
SYM53C500_detach(struct pcmcia_device *link)
{
	DEBUG(0, "SYM53C500_detach(0x%p)\n", link);

	SYM53C500_release(link);

	kfree(link->priv);
	link->priv = NULL;
} /* SYM53C500_detach */

static int
SYM53C500_probe(struct pcmcia_device *link)
{
	struct scsi_info_t *info;

	DEBUG(0, "SYM53C500_attach()\n");

	/* Create new SCSI device */
	info = kzalloc(sizeof(*info), GFP_KERNEL);
	if (!info)
		return -ENOMEM;
	info->p_dev = link;
	link->priv = info;
	link->io.NumPorts1 = 16;
	link->io.Attributes1 = IO_DATA_PATH_WIDTH_AUTO;
	link->io.IOAddrLines = 10;
	link->irq.Attributes = IRQ_TYPE_EXCLUSIVE;
	link->irq.IRQInfo1 = IRQ_LEVEL_ID;
	link->conf.Attributes = CONF_ENABLE_IRQ;
	link->conf.IntType = INT_MEMORY_AND_IO;

	return SYM53C500_config(link);
} /* SYM53C500_attach */

MODULE_AUTHOR("Bob Tracy <rct@frus.com>");
MODULE_DESCRIPTION("SYM53C500 PCMCIA SCSI driver");
MODULE_LICENSE("GPL");

static struct pcmcia_device_id sym53c500_ids[] = {
	PCMCIA_DEVICE_PROD_ID12("BASICS by New Media Corporation", "SCSI Sym53C500", 0x23c78a9d, 0x0099e7f7),
	PCMCIA_DEVICE_PROD_ID12("New Media Corporation", "SCSI Bus Toaster Sym53C500", 0x085a850b, 0x45432eb8),
	PCMCIA_DEVICE_PROD_ID2("SCSI9000", 0x21648f44),
	PCMCIA_DEVICE_NULL,
};
MODULE_DEVICE_TABLE(pcmcia, sym53c500_ids);

static struct pcmcia_driver sym53c500_cs_driver = {
	.owner		= THIS_MODULE,
	.drv		= {
		.name	= "sym53c500_cs",
	},
	.probe		= SYM53C500_probe,
	.remove		= SYM53C500_detach,
	.id_table       = sym53c500_ids,
	.resume		= sym53c500_resume,
};

static int __init
init_sym53c500_cs(void)
{
	return pcmcia_register_driver(&sym53c500_cs_driver);
}

static void __exit
exit_sym53c500_cs(void)
{
	pcmcia_unregister_driver(&sym53c500_cs_driver);
}

module_init(init_sym53c500_cs);
module_exit(exit_sym53c500_cs);