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Linux-2.6.12-rc2
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / scsi / NCR53c406a.c
blobc685d546f8381e68a8e99a348e5d054caf6c472c
1 /*
2 * NCR53c406.c
3 * Low-level SCSI driver for NCR53c406a chip.
4 * Copyright (C) 1994, 1995, 1996 Normunds Saumanis (normunds@fi.ibm.com)
5 *
6 * LILO command line usage: ncr53c406a=<PORTBASE>[,<IRQ>[,<FASTPIO>]]
7 * Specify IRQ = 0 for non-interrupt driven mode.
8 * FASTPIO = 1 for fast pio mode, 0 for slow mode.
9 *
10 * This program is free software; you can redistribute it and/or modify it
11 * under the terms of the GNU General Public License as published by the
12 * Free Software Foundation; either version 2, or (at your option) any
13 * later version.
14 *
15 * This program is distributed in the hope that it will be useful, but
16 * WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 * General Public License for more details.
19 *
20 */
21
22 #define NCR53C406A_DEBUG 0
23 #define VERBOSE_NCR53C406A_DEBUG 0
24
25 /* Set this to 1 for PIO mode (recommended) or to 0 for DMA mode */
26 #define USE_PIO 1
27
28 #define USE_BIOS 0
29 /* #define BIOS_ADDR 0xD8000 *//* define this if autoprobe fails */
30 /* #define PORT_BASE 0x330 *//* define this if autoprobe fails */
31 /* #define IRQ_LEV 0 *//* define this if autoprobe fails */
32 #define DMA_CHAN 5 /* this is ignored if DMA is disabled */
33
34 /* Set this to 0 if you encounter kernel lockups while transferring
35 * data in PIO mode */
36 #define USE_FAST_PIO 1
37
38 /* ============= End of user configurable parameters ============= */
39
40 #include <linux/module.h>
41
42 #include <linux/errno.h>
43 #include <linux/ioport.h>
44 #include <linux/sched.h>
45 #include <linux/interrupt.h>
46 #include <linux/proc_fs.h>
47 #include <linux/stat.h>
48 #include <linux/init.h>
49 #include <linux/bitops.h>
50 #include <asm/io.h>
51 #include <asm/dma.h>
52 #include <asm/irq.h>
53
54 #include <linux/blkdev.h>
55 #include <linux/spinlock.h>
56 #include "scsi.h"
57 #include <scsi/scsi_host.h>
58
59 /* ============================================================= */
60
61 #define WATCHDOG 5000000
62
63 #define SYNC_MODE 0 /* Synchronous transfer mode */
64
65 #if DEBUG
66 #undef NCR53C406A_DEBUG
67 #define NCR53C406A_DEBUG 1
68 #endif
69
70 #if USE_PIO
71 #define USE_DMA 0
72 #else
73 #define USE_DMA 1
74 #endif
75
76 /* Default configuration */
77 #define C1_IMG 0x07 /* ID=7 */
78 #define C2_IMG 0x48 /* FE SCSI2 */
79 #if USE_DMA
80 #define C3_IMG 0x21 /* CDB TE */
81 #else
82 #define C3_IMG 0x20 /* CDB */
83 #endif
84 #define C4_IMG 0x04 /* ANE */
85 #define C5_IMG 0xb6 /* AA PI SIE POL */
86
87 #define REG0 (outb(C4_IMG, CONFIG4))
88 #define REG1 (outb(C5_IMG, CONFIG5))
89
90 #if NCR53C406A_DEBUG
91 #define DEB(x) x
92 #else
93 #define DEB(x)
94 #endif
95
96 #if VERBOSE_NCR53C406A_DEBUG
97 #define VDEB(x) x
98 #else
99 #define VDEB(x)
100 #endif
101
102 #define LOAD_DMA_COUNT(count) \
103 outb(count & 0xff, TC_LSB); \
104 outb((count >> 8) & 0xff, TC_MSB); \
105 outb((count >> 16) & 0xff, TC_HIGH);
106
107 /* Chip commands */
108 #define DMA_OP 0x80
109
110 #define SCSI_NOP 0x00
111 #define FLUSH_FIFO 0x01
112 #define CHIP_RESET 0x02
113 #define SCSI_RESET 0x03
114 #define RESELECT 0x40
115 #define SELECT_NO_ATN 0x41
116 #define SELECT_ATN 0x42
117 #define SELECT_ATN_STOP 0x43
118 #define ENABLE_SEL 0x44
119 #define DISABLE_SEL 0x45
120 #define SELECT_ATN3 0x46
121 #define RESELECT3 0x47
122 #define TRANSFER_INFO 0x10
123 #define INIT_CMD_COMPLETE 0x11
124 #define MSG_ACCEPT 0x12
125 #define TRANSFER_PAD 0x18
126 #define SET_ATN 0x1a
127 #define RESET_ATN 0x1b
128 #define SEND_MSG 0x20
129 #define SEND_STATUS 0x21
130 #define SEND_DATA 0x22
131 #define DISCONN_SEQ 0x23
132 #define TERMINATE_SEQ 0x24
133 #define TARG_CMD_COMPLETE 0x25
134 #define DISCONN 0x27
135 #define RECV_MSG 0x28
136 #define RECV_CMD 0x29
137 #define RECV_DATA 0x2a
138 #define RECV_CMD_SEQ 0x2b
139 #define TARGET_ABORT_DMA 0x04
140
141 /*----------------------------------------------------------------*/
142 /* the following will set the monitor border color (useful to find
143 where something crashed or gets stuck at */
144 /* 1 = blue
145 2 = green
146 3 = cyan
147 4 = red
148 5 = magenta
149 6 = yellow
150 7 = white
151 */
152
153 #if NCR53C406A_DEBUG
154 #define rtrc(i) {inb(0x3da);outb(0x31,0x3c0);outb((i),0x3c0);}
155 #else
156 #define rtrc(i) {}
157 #endif
158 /*----------------------------------------------------------------*/
159
160 enum Phase {
161 idle,
162 data_out,
163 data_in,
164 command_ph,
165 status_ph,
166 message_out,
167 message_in
168 };
169
170 /* Static function prototypes */
171 static void NCR53c406a_intr(int, void *, struct pt_regs *);
172 static irqreturn_t do_NCR53c406a_intr(int, void *, struct pt_regs *);
173 static void chip_init(void);
174 static void calc_port_addr(void);
175 #ifndef IRQ_LEV
176 static int irq_probe(void);
177 #endif
178
179 /* ================================================================= */
180
181 #if USE_BIOS
182 static void *bios_base;
183 #endif
184
185 #if PORT_BASE
186 static int port_base = PORT_BASE;
187 #else
188 static int port_base;
189 #endif
190
191 #if IRQ_LEV
192 static int irq_level = IRQ_LEV;
193 #else
194 static int irq_level = -1; /* 0 is 'no irq', so use -1 for 'uninitialized' */
195 #endif
196
197 #if USE_DMA
198 static int dma_chan;
199 #endif
200
201 #if USE_PIO
202 static int fast_pio = USE_FAST_PIO;
203 #endif
204
205 static Scsi_Cmnd *current_SC;
206 static char info_msg[256];
207
208 /* ================================================================= */
209
210 /* possible BIOS locations */
211 #if USE_BIOS
212 static void *addresses[] = {
213 (void *) 0xd8000,
214 (void *) 0xc8000
215 };
216 #define ADDRESS_COUNT (sizeof( addresses ) / sizeof( unsigned ))
217 #endif /* USE_BIOS */
218
219 /* possible i/o port addresses */
220 static unsigned short ports[] = { 0x230, 0x330, 0x280, 0x290, 0x330, 0x340, 0x300, 0x310, 0x348, 0x350 };
221 #define PORT_COUNT (sizeof( ports ) / sizeof( unsigned short ))
222
223 /* possible interrupt channels */
224 static unsigned short intrs[] = { 10, 11, 12, 15 };
225 #define INTR_COUNT (sizeof( intrs ) / sizeof( unsigned short ))
226
227 /* signatures for NCR 53c406a based controllers */
228 #if USE_BIOS
229 struct signature {
230 char *signature;
231 int sig_offset;
232 int sig_length;
233 } signatures[] __initdata = {
234 /* 1 2 3 4 5 6 */
235 /* 123456789012345678901234567890123456789012345678901234567890 */
236 {
237 "Copyright (C) Acculogic, Inc.\r\n2.8M Diskette Extension Bios ver 4.04.03 03/01/1993", 61, 82},};
238
239 #define SIGNATURE_COUNT (sizeof( signatures ) / sizeof( struct signature ))
240 #endif /* USE_BIOS */
241
242 /* ============================================================ */
243
244 /* Control Register Set 0 */
245 static int TC_LSB; /* transfer counter lsb */
246 static int TC_MSB; /* transfer counter msb */
247 static int SCSI_FIFO; /* scsi fifo register */
248 static int CMD_REG; /* command register */
249 static int STAT_REG; /* status register */
250 static int DEST_ID; /* selection/reselection bus id */
251 static int INT_REG; /* interrupt status register */
252 static int SRTIMOUT; /* select/reselect timeout reg */
253 static int SEQ_REG; /* sequence step register */
254 static int SYNCPRD; /* synchronous transfer period */
255 static int FIFO_FLAGS; /* indicates # of bytes in fifo */
256 static int SYNCOFF; /* synchronous offset register */
257 static int CONFIG1; /* configuration register */
258 static int CLKCONV; /* clock conversion reg */
259 /*static int TESTREG;*//* test mode register */
260 static int CONFIG2; /* Configuration 2 Register */
261 static int CONFIG3; /* Configuration 3 Register */
262 static int CONFIG4; /* Configuration 4 Register */
263 static int TC_HIGH; /* Transfer Counter High */
264 /*static int FIFO_BOTTOM;*//* Reserve FIFO byte register */
265
266 /* Control Register Set 1 */
267 /*static int JUMPER_SENSE;*//* Jumper sense port reg (r/w) */
268 /*static int SRAM_PTR;*//* SRAM address pointer reg (r/w) */
269 /*static int SRAM_DATA;*//* SRAM data register (r/w) */
270 static int PIO_FIFO; /* PIO FIFO registers (r/w) */
271 /*static int PIO_FIFO1;*//* */
272 /*static int PIO_FIFO2;*//* */
273 /*static int PIO_FIFO3;*//* */
274 static int PIO_STATUS; /* PIO status (r/w) */
275 /*static int ATA_CMD;*//* ATA command/status reg (r/w) */
276 /*static int ATA_ERR;*//* ATA features/error register (r/w) */
277 static int PIO_FLAG; /* PIO flag interrupt enable (r/w) */
278 static int CONFIG5; /* Configuration 5 register (r/w) */
279 /*static int SIGNATURE;*//* Signature Register (r) */
280 /*static int CONFIG6;*//* Configuration 6 register (r) */
281
282 /* ============================================================== */
283
284 #if USE_DMA
285 static __inline__ int NCR53c406a_dma_setup(unsigned char *ptr, unsigned int count, unsigned char mode)
286 {
287 unsigned limit;
288 unsigned long flags = 0;
289
290 VDEB(printk("dma: before count=%d ", count));
291 if (dma_chan <= 3) {
292 if (count > 65536)
293 count = 65536;
294 limit = 65536 - (((unsigned) ptr) & 0xFFFF);
295 } else {
296 if (count > (65536 << 1))
297 count = (65536 << 1);
298 limit = (65536 << 1) - (((unsigned) ptr) & 0x1FFFF);
299 }
300
301 if (count > limit)
302 count = limit;
303
304 VDEB(printk("after count=%d\n", count));
305 if ((count & 1) || (((unsigned) ptr) & 1))
306 panic("NCR53c406a: attempted unaligned DMA transfer\n");
307
308 flags = claim_dma_lock();
309 disable_dma(dma_chan);
310 clear_dma_ff(dma_chan);
311 set_dma_addr(dma_chan, (long) ptr);
312 set_dma_count(dma_chan, count);
313 set_dma_mode(dma_chan, mode);
314 enable_dma(dma_chan);
315 release_dma_lock(flags);
316
317 return count;
318 }
319
320 static __inline__ int NCR53c406a_dma_write(unsigned char *src, unsigned int count)
321 {
322 return NCR53c406a_dma_setup(src, count, DMA_MODE_WRITE);
323 }
324
325 static __inline__ int NCR53c406a_dma_read(unsigned char *src, unsigned int count)
326 {
327 return NCR53c406a_dma_setup(src, count, DMA_MODE_READ);
328 }
329
330 static __inline__ int NCR53c406a_dma_residual(void)
331 {
332 register int tmp;
333 unsigned long flags;
334
335 flags = claim_dma_lock();
336 clear_dma_ff(dma_chan);
337 tmp = get_dma_residue(dma_chan);
338 release_dma_lock(flags);
339
340 return tmp;
341 }
342 #endif /* USE_DMA */
343
344 #if USE_PIO
345 static __inline__ int NCR53c406a_pio_read(unsigned char *request, unsigned int reqlen)
346 {
347 int i;
348 int len; /* current scsi fifo size */
349
350 REG1;
351 while (reqlen) {
352 i = inb(PIO_STATUS);
353 /* VDEB(printk("pio_status=%x\n", i)); */
354 if (i & 0x80)
355 return 0;
356
357 switch (i & 0x1e) {
358 default:
359 case 0x10:
360 len = 0;
361 break;
362 case 0x0:
363 len = 1;
364 break;
365 case 0x8:
366 len = 42;
367 break;
368 case 0xc:
369 len = 84;
370 break;
371 case 0xe:
372 len = 128;
373 break;
374 }
375
376 if ((i & 0x40) && len == 0) { /* fifo empty and interrupt occurred */
377 return 0;
378 }
379
380 if (len) {
381 if (len > reqlen)
382 len = reqlen;
383
384 if (fast_pio && len > 3) {
385 insl(PIO_FIFO, request, len >> 2);
386 request += len & 0xfc;
387 reqlen -= len & 0xfc;
388 } else {
389 while (len--) {
390 *request++ = inb(PIO_FIFO);
391 reqlen--;
392 }
393 }
394 }
395 }
396 return 0;
397 }
398
399 static __inline__ int NCR53c406a_pio_write(unsigned char *request, unsigned int reqlen)
400 {
401 int i = 0;
402 int len; /* current scsi fifo size */
403
404 REG1;
405 while (reqlen && !(i & 0x40)) {
406 i = inb(PIO_STATUS);
407 /* VDEB(printk("pio_status=%x\n", i)); */
408 if (i & 0x80) /* error */
409 return 0;
410
411 switch (i & 0x1e) {
412 case 0x10:
413 len = 128;
414 break;
415 case 0x0:
416 len = 84;
417 break;
418 case 0x8:
419 len = 42;
420 break;
421 case 0xc:
422 len = 1;
423 break;
424 default:
425 case 0xe:
426 len = 0;
427 break;
428 }
429
430 if (len) {
431 if (len > reqlen)
432 len = reqlen;
433
434 if (fast_pio && len > 3) {
435 outsl(PIO_FIFO, request, len >> 2);
436 request += len & 0xfc;
437 reqlen -= len & 0xfc;
438 } else {
439 while (len--) {
440 outb(*request++, PIO_FIFO);
441 reqlen--;
442 }
443 }
444 }
445 }
446 return 0;
447 }
448 #endif /* USE_PIO */
449
450 static int __init NCR53c406a_detect(Scsi_Host_Template * tpnt)
451 {
452 int present = 0;
453 struct Scsi_Host *shpnt = NULL;
454 #ifndef PORT_BASE
455 int i;
456 #endif
457
458 #if USE_BIOS
459 int ii, jj;
460 bios_base = 0;
461 /* look for a valid signature */
462 for (ii = 0; ii < ADDRESS_COUNT && !bios_base; ii++)
463 for (jj = 0; (jj < SIGNATURE_COUNT) && !bios_base; jj++)
464 if (!memcmp((void *) addresses[ii] + signatures[jj].sig_offset, (void *) signatures[jj].signature, (int) signatures[jj].sig_length))
465 bios_base = addresses[ii];
466
467 if (!bios_base) {
468 printk("NCR53c406a: BIOS signature not found\n");
469 return 0;
470 }
471
472 DEB(printk("NCR53c406a BIOS found at 0x%x\n", (unsigned int) bios_base);
473 );
474 #endif /* USE_BIOS */
475
476 #ifdef PORT_BASE
477 if (!request_region(port_base, 0x10, "NCR53c406a")) /* ports already snatched */
478 port_base = 0;
479
480 #else /* autodetect */
481 if (port_base) { /* LILO override */
482 if (!request_region(port_base, 0x10, "NCR53c406a"))
483 port_base = 0;
484 } else {
485 for (i = 0; i < PORT_COUNT && !port_base; i++) {
486 if (!request_region(ports[i], 0x10, "NCR53c406a")) {
487 DEB(printk("NCR53c406a: port 0x%x in use\n", ports[i]));
488 } else {
489 VDEB(printk("NCR53c406a: port 0x%x available\n", ports[i]));
490 outb(C5_IMG, ports[i] + 0x0d); /* reg set 1 */
491 if ((inb(ports[i] + 0x0e) ^ inb(ports[i] + 0x0e)) == 7 && (inb(ports[i] + 0x0e) ^ inb(ports[i] + 0x0e)) == 7 && (inb(ports[i] + 0x0e) & 0xf8) == 0x58) {
492 port_base = ports[i];
493 VDEB(printk("NCR53c406a: Sig register valid\n"));
494 VDEB(printk("port_base=0x%x\n", port_base));
495 break;
496 }
497 release_region(ports[i], 0x10);
498 }
499 }
500 }
501 #endif /* PORT_BASE */
502
503 if (!port_base) { /* no ports found */
504 printk("NCR53c406a: no available ports found\n");
505 return 0;
506 }
507
508 DEB(printk("NCR53c406a detected\n"));
509
510 calc_port_addr();
511 chip_init();
512
513 #ifndef IRQ_LEV
514 if (irq_level < 0) { /* LILO override if >= 0 */
515 irq_level = irq_probe();
516 if (irq_level < 0) { /* Trouble */
517 printk("NCR53c406a: IRQ problem, irq_level=%d, giving up\n", irq_level);
518 goto err_release;
519 }
520 }
521 #endif
522
523 DEB(printk("NCR53c406a: using port_base 0x%x\n", port_base));
524
525 present = 1;
526 tpnt->proc_name = "NCR53c406a";
527
528 shpnt = scsi_register(tpnt, 0);
529 if (!shpnt) {
530 printk("NCR53c406a: Unable to register host, giving up.\n");
531 goto err_release;
532 }
533
534 if (irq_level > 0) {
535 if (request_irq(irq_level, do_NCR53c406a_intr, 0, "NCR53c406a", shpnt)) {
536 printk("NCR53c406a: unable to allocate IRQ %d\n", irq_level);
537 goto err_free_scsi;
538 }
539 tpnt->can_queue = 1;
540 DEB(printk("NCR53c406a: allocated IRQ %d\n", irq_level));
541 } else if (irq_level == 0) {
542 tpnt->can_queue = 0;
543 DEB(printk("NCR53c406a: No interrupts detected\n"));
544 printk("NCR53c406a driver no longer supports polling interface\n");
545 printk("Please email linux-scsi@vger.kernel.org\n");
546
547 #if USE_DMA
548 printk("NCR53c406a: No interrupts found and DMA mode defined. Giving up.\n");
549 #endif /* USE_DMA */
550 goto err_free_scsi;
551 } else {
552 DEB(printk("NCR53c406a: Shouldn't get here!\n"));
553 goto err_free_scsi;
554 }
555
556 #if USE_DMA
557 dma_chan = DMA_CHAN;
558 if (request_dma(dma_chan, "NCR53c406a") != 0) {
559 printk("NCR53c406a: unable to allocate DMA channel %d\n", dma_chan);
560 goto err_free_irq;
561 }
562
563 DEB(printk("Allocated DMA channel %d\n", dma_chan));
564 #endif /* USE_DMA */
565
566 shpnt->irq = irq_level;
567 shpnt->io_port = port_base;
568 shpnt->n_io_port = 0x10;
569 #if USE_DMA
570 shpnt->dma = dma_chan;
571 #endif
572
573 #if USE_DMA
574 sprintf(info_msg, "NCR53c406a at 0x%x, IRQ %d, DMA channel %d.", port_base, irq_level, dma_chan);
575 #else
576 sprintf(info_msg, "NCR53c406a at 0x%x, IRQ %d, %s PIO mode.", port_base, irq_level, fast_pio ? "fast" : "slow");
577 #endif
578
579 return (present);
580
581 #if USE_DMA
582 err_free_irq:
583 if (irq_level)
584 free_irq(irq_level, shpnt);
585 #endif
586 err_free_scsi:
587 scsi_unregister(shpnt);
588 err_release:
589 release_region(port_base, 0x10);
590 return 0;
591 }
592
593 static int NCR53c406a_release(struct Scsi_Host *shost)
594 {
595 if (shost->irq)
596 free_irq(shost->irq, NULL);
597 #ifdef USE_DMA
598 if (shost->dma_channel != 0xff)
599 free_dma(shost->dma_channel);
600 #endif
601 if (shost->io_port && shost->n_io_port)
602 release_region(shost->io_port, shost->n_io_port);
603
604 scsi_unregister(shost);
605 return 0;
606 }
607
608 /* called from init/main.c */
609 static int __init NCR53c406a_setup(char *str)
610 {
611 static size_t setup_idx = 0;
612 size_t i;
613 int ints[4];
614
615 DEB(printk("NCR53c406a: Setup called\n");
616 );
617
618 if (setup_idx >= PORT_COUNT - 1) {
619 printk("NCR53c406a: Setup called too many times. Bad LILO params?\n");
620 return 0;
621 }
622 get_options(str, 4, ints);
623 if (ints[0] < 1 || ints[0] > 3) {
624 printk("NCR53c406a: Malformed command line\n");
625 printk("NCR53c406a: Usage: ncr53c406a=<PORTBASE>[,<IRQ>[,<FASTPIO>]]\n");
626 return 0;
627 }
628 for (i = 0; i < PORT_COUNT && !port_base; i++)
629 if (ports[i] == ints[1]) {
630 port_base = ints[1];
631 DEB(printk("NCR53c406a: Specified port_base 0x%x\n", port_base);
632 )
633 }
634 if (!port_base) {
635 printk("NCR53c406a: Invalid PORTBASE 0x%x specified\n", ints[1]);
636 return 0;
637 }
638
639 if (ints[0] > 1) {
640 if (ints[2] == 0) {
641 irq_level = 0;
642 DEB(printk("NCR53c406a: Specified irq %d\n", irq_level);
643 )
644 } else
645 for (i = 0; i < INTR_COUNT && irq_level < 0; i++)
646 if (intrs[i] == ints[2]) {
647 irq_level = ints[2];
648 DEB(printk("NCR53c406a: Specified irq %d\n", port_base);
649 )
650 }
651 if (irq_level < 0)
652 printk("NCR53c406a: Invalid IRQ %d specified\n", ints[2]);
653 }
654
655 if (ints[0] > 2)
656 fast_pio = ints[3];
657
658 DEB(printk("NCR53c406a: port_base=0x%x, irq=%d, fast_pio=%d\n", port_base, irq_level, fast_pio);)
659 return 1;
660 }
661
662 __setup("ncr53c406a=", NCR53c406a_setup);
663
664 static const char *NCR53c406a_info(struct Scsi_Host *SChost)
665 {
666 DEB(printk("NCR53c406a_info called\n"));
667 return (info_msg);
668 }
669
670 #if 0
671 static void wait_intr(void)
672 {
673 unsigned long i = jiffies + WATCHDOG;
674
675 while (time_after(i, jiffies) && !(inb(STAT_REG) & 0xe0)) { /* wait for a pseudo-interrupt */
676 cpu_relax();
677 barrier();
678 }
679
680 if (time_before_eq(i, jiffies)) { /* Timed out */
681 rtrc(0);
682 current_SC->result = DID_TIME_OUT << 16;
683 current_SC->SCp.phase = idle;
684 current_SC->scsi_done(current_SC);
685 return;
686 }
687
688 NCR53c406a_intr(0, NULL, NULL);
689 }
690 #endif
691
692 static int NCR53c406a_queue(Scsi_Cmnd * SCpnt, void (*done) (Scsi_Cmnd *))
693 {
694 int i;
695
696 VDEB(printk("NCR53c406a_queue called\n"));
697 DEB(printk("cmd=%02x, cmd_len=%02x, target=%02x, lun=%02x, bufflen=%d\n", SCpnt->cmnd[0], SCpnt->cmd_len, SCpnt->target, SCpnt->lun, SCpnt->request_bufflen));
698
699 #if 0
700 VDEB(for (i = 0; i < SCpnt->cmd_len; i++)
701 printk("cmd[%d]=%02x ", i, SCpnt->cmnd[i]));
702 VDEB(printk("\n"));
703 #endif
704
705 current_SC = SCpnt;
706 current_SC->scsi_done = done;
707 current_SC->SCp.phase = command_ph;
708 current_SC->SCp.Status = 0;
709 current_SC->SCp.Message = 0;
710
711 /* We are locked here already by the mid layer */
712 REG0;
713 outb(SCpnt->device->id, DEST_ID); /* set destination */
714 outb(FLUSH_FIFO, CMD_REG); /* reset the fifos */
715
716 for (i = 0; i < SCpnt->cmd_len; i++) {
717 outb(SCpnt->cmnd[i], SCSI_FIFO);
718 }
719 outb(SELECT_NO_ATN, CMD_REG);
720
721 rtrc(1);
722 return 0;
723 }
724
725 static int NCR53c406a_abort(Scsi_Cmnd * SCpnt)
726 {
727 DEB(printk("NCR53c406a_abort called\n"));
728 return FAILED; /* Don't know how to abort */
729 }
730
731 static int NCR53c406a_host_reset(Scsi_Cmnd * SCpnt)
732 {
733 DEB(printk("NCR53c406a_reset called\n"));
734 outb(C4_IMG, CONFIG4); /* Select reg set 0 */
735 outb(CHIP_RESET, CMD_REG);
736 outb(SCSI_NOP, CMD_REG); /* required after reset */
737 outb(SCSI_RESET, CMD_REG);
738 chip_init();
739
740 rtrc(2);
741 return SUCCESS;
742 }
743
744 static int NCR53c406a_device_reset(Scsi_Cmnd * SCpnt)
745 {
746 return FAILED;
747 }
748
749 static int NCR53c406a_bus_reset(Scsi_Cmnd * SCpnt)
750 {
751 return FAILED;
752 }
753
754 static int NCR53c406a_biosparm(struct scsi_device *disk,
755 struct block_device *dev,
756 sector_t capacity, int *info_array)
757 {
758 int size;
759
760 DEB(printk("NCR53c406a_biosparm called\n"));
761
762 size = capacity;
763 info_array[0] = 64; /* heads */
764 info_array[1] = 32; /* sectors */
765 info_array[2] = size >> 11; /* cylinders */
766 if (info_array[2] > 1024) { /* big disk */
767 info_array[0] = 255;
768 info_array[1] = 63;
769 info_array[2] = size / (255 * 63);
770 }
771 return 0;
772 }
773
774 static irqreturn_t do_NCR53c406a_intr(int unused, void *dev_id,
775 struct pt_regs *regs)
776 {
777 unsigned long flags;
778 struct Scsi_Host *dev = dev_id;
779
780 spin_lock_irqsave(dev->host_lock, flags);
781 NCR53c406a_intr(0, dev_id, regs);
782 spin_unlock_irqrestore(dev->host_lock, flags);
783 return IRQ_HANDLED;
784 }
785
786 static void NCR53c406a_intr(int unused, void *dev_id, struct pt_regs *regs)
787 {
788 DEB(unsigned char fifo_size;
789 )
790 DEB(unsigned char seq_reg;
791 )
792 unsigned char status, int_reg;
793 #if USE_PIO
794 unsigned char pio_status;
795 struct scatterlist *sglist;
796 unsigned int sgcount;
797 #endif
798
799 VDEB(printk("NCR53c406a_intr called\n"));
800
801 #if USE_PIO
802 REG1;
803 pio_status = inb(PIO_STATUS);
804 #endif
805 REG0;
806 status = inb(STAT_REG);
807 DEB(seq_reg = inb(SEQ_REG));
808 int_reg = inb(INT_REG);
809 DEB(fifo_size = inb(FIFO_FLAGS) & 0x1f);
810
811 #if NCR53C406A_DEBUG
812 printk("status=%02x, seq_reg=%02x, int_reg=%02x, fifo_size=%02x", status, seq_reg, int_reg, fifo_size);
813 #if (USE_DMA)
814 printk("\n");
815 #else
816 printk(", pio=%02x\n", pio_status);
817 #endif /* USE_DMA */
818 #endif /* NCR53C406A_DEBUG */
819
820 if (int_reg & 0x80) { /* SCSI reset intr */
821 rtrc(3);
822 DEB(printk("NCR53c406a: reset intr received\n"));
823 current_SC->SCp.phase = idle;
824 current_SC->result = DID_RESET << 16;
825 current_SC->scsi_done(current_SC);
826 return;
827 }
828 #if USE_PIO
829 if (pio_status & 0x80) {
830 printk("NCR53C406A: Warning: PIO error!\n");
831 current_SC->SCp.phase = idle;
832 current_SC->result = DID_ERROR << 16;
833 current_SC->scsi_done(current_SC);
834 return;
835 }
836 #endif /* USE_PIO */
837
838 if (status & 0x20) { /* Parity error */
839 printk("NCR53c406a: Warning: parity error!\n");
840 current_SC->SCp.phase = idle;
841 current_SC->result = DID_PARITY << 16;
842 current_SC->scsi_done(current_SC);
843 return;
844 }
845
846 if (status & 0x40) { /* Gross error */
847 printk("NCR53c406a: Warning: gross error!\n");
848 current_SC->SCp.phase = idle;
849 current_SC->result = DID_ERROR << 16;
850 current_SC->scsi_done(current_SC);
851 return;
852 }
853
854 if (int_reg & 0x20) { /* Disconnect */
855 DEB(printk("NCR53c406a: disconnect intr received\n"));
856 if (current_SC->SCp.phase != message_in) { /* Unexpected disconnect */
857 current_SC->result = DID_NO_CONNECT << 16;
858 } else { /* Command complete, return status and message */
859 current_SC->result = (current_SC->SCp.Status & 0xff)
860 | ((current_SC->SCp.Message & 0xff) << 8) | (DID_OK << 16);
861 }
862
863 rtrc(0);
864 current_SC->SCp.phase = idle;
865 current_SC->scsi_done(current_SC);
866 return;
867 }
868
869 switch (status & 0x07) { /* scsi phase */
870 case 0x00: /* DATA-OUT */
871 if (int_reg & 0x10) { /* Target requesting info transfer */
872 rtrc(5);
873 current_SC->SCp.phase = data_out;
874 VDEB(printk("NCR53c406a: Data-Out phase\n"));
875 outb(FLUSH_FIFO, CMD_REG);
876 LOAD_DMA_COUNT(current_SC->request_bufflen); /* Max transfer size */
877 #if USE_DMA /* No s/g support for DMA */
878 NCR53c406a_dma_write(current_SC->request_buffer, current_SC->request_bufflen);
879 #endif /* USE_DMA */
880 outb(TRANSFER_INFO | DMA_OP, CMD_REG);
881 #if USE_PIO
882 if (!current_SC->use_sg) /* Don't use scatter-gather */
883 NCR53c406a_pio_write(current_SC->request_buffer, current_SC->request_bufflen);
884 else { /* use scatter-gather */
885 sgcount = current_SC->use_sg;
886 sglist = current_SC->request_buffer;
887 while (sgcount--) {
888 NCR53c406a_pio_write(page_address(sglist->page) + sglist->offset, sglist->length);
889 sglist++;
890 }
891 }
892 REG0;
893 #endif /* USE_PIO */
894 }
895 break;
896
897 case 0x01: /* DATA-IN */
898 if (int_reg & 0x10) { /* Target requesting info transfer */
899 rtrc(6);
900 current_SC->SCp.phase = data_in;
901 VDEB(printk("NCR53c406a: Data-In phase\n"));
902 outb(FLUSH_FIFO, CMD_REG);
903 LOAD_DMA_COUNT(current_SC->request_bufflen); /* Max transfer size */
904 #if USE_DMA /* No s/g support for DMA */
905 NCR53c406a_dma_read(current_SC->request_buffer, current_SC->request_bufflen);
906 #endif /* USE_DMA */
907 outb(TRANSFER_INFO | DMA_OP, CMD_REG);
908 #if USE_PIO
909 if (!current_SC->use_sg) /* Don't use scatter-gather */
910 NCR53c406a_pio_read(current_SC->request_buffer, current_SC->request_bufflen);
911 else { /* Use scatter-gather */
912 sgcount = current_SC->use_sg;
913 sglist = current_SC->request_buffer;
914 while (sgcount--) {
915 NCR53c406a_pio_read(page_address(sglist->page) + sglist->offset, sglist->length);
916 sglist++;
917 }
918 }
919 REG0;
920 #endif /* USE_PIO */
921 }
922 break;
923
924 case 0x02: /* COMMAND */
925 current_SC->SCp.phase = command_ph;
926 printk("NCR53c406a: Warning: Unknown interrupt occurred in command phase!\n");
927 break;
928
929 case 0x03: /* STATUS */
930 rtrc(7);
931 current_SC->SCp.phase = status_ph;
932 VDEB(printk("NCR53c406a: Status phase\n"));
933 outb(FLUSH_FIFO, CMD_REG);
934 outb(INIT_CMD_COMPLETE, CMD_REG);
935 break;
936
937 case 0x04: /* Reserved */
938 case 0x05: /* Reserved */
939 printk("NCR53c406a: WARNING: Reserved phase!!!\n");
940 break;
941
942 case 0x06: /* MESSAGE-OUT */
943 DEB(printk("NCR53c406a: Message-Out phase\n"));
944 current_SC->SCp.phase = message_out;
945 outb(SET_ATN, CMD_REG); /* Reject the message */
946 outb(MSG_ACCEPT, CMD_REG);
947 break;
948
949 case 0x07: /* MESSAGE-IN */
950 rtrc(4);
951 VDEB(printk("NCR53c406a: Message-In phase\n"));
952 current_SC->SCp.phase = message_in;
953
954 current_SC->SCp.Status = inb(SCSI_FIFO);
955 current_SC->SCp.Message = inb(SCSI_FIFO);
956
957 VDEB(printk("SCSI FIFO size=%d\n", inb(FIFO_FLAGS) & 0x1f));
958 DEB(printk("Status = %02x Message = %02x\n", current_SC->SCp.Status, current_SC->SCp.Message));
959
960 if (current_SC->SCp.Message == SAVE_POINTERS || current_SC->SCp.Message == DISCONNECT) {
961 outb(SET_ATN, CMD_REG); /* Reject message */
962 DEB(printk("Discarding SAVE_POINTERS message\n"));
963 }
964 outb(MSG_ACCEPT, CMD_REG);
965 break;
966 }
967 }
968
969 #ifndef IRQ_LEV
970 static int irq_probe(void)
971 {
972 int irqs, irq;
973 unsigned long i;
974
975 inb(INT_REG); /* clear the interrupt register */
976 irqs = probe_irq_on();
977
978 /* Invalid command will cause an interrupt */
979 REG0;
980 outb(0xff, CMD_REG);
981
982 /* Wait for the interrupt to occur */
983 i = jiffies + WATCHDOG;
984 while (time_after(i, jiffies) && !(inb(STAT_REG) & 0x80))
985 barrier();
986 if (time_before_eq(i, jiffies)) { /* Timed out, must be hardware trouble */
987 probe_irq_off(irqs);
988 return -1;
989 }
990
991 irq = probe_irq_off(irqs);
992
993 /* Kick the chip */
994 outb(CHIP_RESET, CMD_REG);
995 outb(SCSI_NOP, CMD_REG);
996 chip_init();
997
998 return irq;
999 }
1000 #endif /* IRQ_LEV */
1001
1002 static void chip_init(void)
1003 {
1004 REG1;
1005 #if USE_DMA
1006 outb(0x00, PIO_STATUS);
1007 #else /* USE_PIO */
1008 outb(0x01, PIO_STATUS);
1009 #endif
1010 outb(0x00, PIO_FLAG);
1011
1012 outb(C4_IMG, CONFIG4); /* REG0; */
1013 outb(C3_IMG, CONFIG3);
1014 outb(C2_IMG, CONFIG2);
1015 outb(C1_IMG, CONFIG1);
1016
1017 outb(0x05, CLKCONV); /* clock conversion factor */
1018 outb(0x9C, SRTIMOUT); /* Selection timeout */
1019 outb(0x05, SYNCPRD); /* Synchronous transfer period */
1020 outb(SYNC_MODE, SYNCOFF); /* synchronous mode */
1021 }
1022
1023 static void __init calc_port_addr(void)
1024 {
1025 /* Control Register Set 0 */
1026 TC_LSB = (port_base + 0x00);
1027 TC_MSB = (port_base + 0x01);
1028 SCSI_FIFO = (port_base + 0x02);
1029 CMD_REG = (port_base + 0x03);
1030 STAT_REG = (port_base + 0x04);
1031 DEST_ID = (port_base + 0x04);
1032 INT_REG = (port_base + 0x05);
1033 SRTIMOUT = (port_base + 0x05);
1034 SEQ_REG = (port_base + 0x06);
1035 SYNCPRD = (port_base + 0x06);
1036 FIFO_FLAGS = (port_base + 0x07);
1037 SYNCOFF = (port_base + 0x07);
1038 CONFIG1 = (port_base + 0x08);
1039 CLKCONV = (port_base + 0x09);
1040 /* TESTREG = (port_base+0x0A); */
1041 CONFIG2 = (port_base + 0x0B);
1042 CONFIG3 = (port_base + 0x0C);
1043 CONFIG4 = (port_base + 0x0D);
1044 TC_HIGH = (port_base + 0x0E);
1045 /* FIFO_BOTTOM = (port_base+0x0F); */
1046
1047 /* Control Register Set 1 */
1048 /* JUMPER_SENSE = (port_base+0x00); */
1049 /* SRAM_PTR = (port_base+0x01); */
1050 /* SRAM_DATA = (port_base+0x02); */
1051 PIO_FIFO = (port_base + 0x04);
1052 /* PIO_FIFO1 = (port_base+0x05); */
1053 /* PIO_FIFO2 = (port_base+0x06); */
1054 /* PIO_FIFO3 = (port_base+0x07); */
1055 PIO_STATUS = (port_base + 0x08);
1056 /* ATA_CMD = (port_base+0x09); */
1057 /* ATA_ERR = (port_base+0x0A); */
1058 PIO_FLAG = (port_base + 0x0B);
1059 CONFIG5 = (port_base + 0x0D);
1060 /* SIGNATURE = (port_base+0x0E); */
1061 /* CONFIG6 = (port_base+0x0F); */
1062 }
1063
1064 MODULE_LICENSE("GPL");
1065
1066 /* NOTE: scatter-gather support only works in PIO mode.
1067 * Use SG_NONE if DMA mode is enabled!
1068 */
1069
1070 static Scsi_Host_Template driver_template =
1071 {
1072 .proc_name = "NCR53c406a" /* proc_name */,
1073 .name = "NCR53c406a" /* name */,
1074 .detect = NCR53c406a_detect /* detect */,
1075 .release = NCR53c406a_release,
1076 .info = NCR53c406a_info /* info */,
1077 .queuecommand = NCR53c406a_queue /* queuecommand */,
1078 .eh_abort_handler = NCR53c406a_abort /* abort */,
1079 .eh_bus_reset_handler = NCR53c406a_bus_reset /* reset */,
1080 .eh_device_reset_handler = NCR53c406a_device_reset /* reset */,
1081 .eh_host_reset_handler = NCR53c406a_host_reset /* reset */,
1082 .bios_param = NCR53c406a_biosparm /* biosparm */,
1083 .can_queue = 1 /* can_queue */,
1084 .this_id = 7 /* SCSI ID of the chip */,
1085 .sg_tablesize = 32 /*SG_ALL*/ /*SG_NONE*/,
1086 .cmd_per_lun = 1 /* commands per lun */,
1087 .unchecked_isa_dma = 1 /* unchecked_isa_dma */,
1088 .use_clustering = ENABLE_CLUSTERING
1089 };
1090
1091 #include "scsi_module.c"
1092
1093 /*
1094 * Overrides for Emacs so that we get a uniform tabbing style.
1095 * Emacs will notice this stuff at the end of the file and automatically
1096 * adjust the settings for this buffer only. This must remain at the end
1097 * of the file.
1098 * ---------------------------------------------------------------------------
1099 * Local variables:
1100 * c-indent-level: 4
1101 * c-brace-imaginary-offset: 0
1102 * c-brace-offset: -4
1103 * c-argdecl-indent: 4
1104 * c-label-offset: -4
1105 * c-continued-statement-offset: 4
1106 * c-continued-brace-offset: 0
1107 * indent-tabs-mode: nil
1108 * tab-width: 8
1109 * End:
1110 */
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