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Merge remote-tracking branch 'regmap/topic/core' into regmap-next
[linux-2.6-block.git] / drivers / scsi / g_NCR5380.c
CommitLineData
1da177e4
LT		 1/*
2 * Generic Generic NCR5380 driver
3 *
4 * Copyright 1993, Drew Eckhardt
5 * Visionary Computing
6 * (Unix and Linux consulting and custom programming)
7 * drew@colorado.edu
8 * +1 (303) 440-4894
9 *
10 * NCR53C400 extensions (c) 1994,1995,1996, Kevin Lentin
11 * K.Lentin@cs.monash.edu.au
12 *
13 * NCR53C400A extensions (c) 1996, Ingmar Baumgart
14 * ingmar@gonzo.schwaben.de
15 *
16 * DTC3181E extensions (c) 1997, Ronald van Cuijlenborg
17 * ronald.van.cuijlenborg@tip.nl or nutty@dds.nl
18 *
19 * Added ISAPNP support for DTC436 adapters,
20 * Thomas Sailer, sailer@ife.ee.ethz.ch
21 *
22 * ALPHA RELEASE 1.
23 *
24 * For more information, please consult
25 *
26 * NCR 5380 Family
27 * SCSI Protocol Controller
28 * Databook
29 *
30 * NCR Microelectronics
31 * 1635 Aeroplaza Drive
32 * Colorado Springs, CO 80916
33 * 1+ (719) 578-3400
34 * 1+ (800) 334-5454
35 */
36
37/*
38 * TODO : flesh out DMA support, find some one actually using this (I have
39 * a memory mapped Trantor board that works fine)
40 */
41
42/*
43 * Options :
44 *
45 * PARITY - enable parity checking. Not supported.
46 *
47 * SCSI2 - enable support for SCSI-II tagged queueing. Untested.
48 *
49 * USLEEP - enable support for devices that don't disconnect. Untested.
50 *
51 * The card is detected and initialized in one of several ways :
52 * 1. With command line overrides - NCR5380=port,irq may be
53 * used on the LILO command line to override the defaults.
54 *
55 * 2. With the GENERIC_NCR5380_OVERRIDE compile time define. This is
56 * specified as an array of address, irq, dma, board tuples. Ie, for
57 * one board at 0x350, IRQ5, no dma, I could say
58 * -DGENERIC_NCR5380_OVERRIDE={{0xcc000, 5, DMA_NONE, BOARD_NCR5380}}
59 *
60 * -1 should be specified for no or DMA interrupt, -2 to autoprobe for an
61 * IRQ line if overridden on the command line.
62 *
63 * 3. When included as a module, with arguments passed on the command line:
64 * ncr_irq=xx the interrupt
65 * ncr_addr=xx the port or base address (for port or memory
66 * mapped, resp.)
67 * ncr_dma=xx the DMA
68 * ncr_5380=1 to set up for a NCR5380 board
69 * ncr_53c400=1 to set up for a NCR53C400 board
70 * e.g.
71 * modprobe g_NCR5380 ncr_irq=5 ncr_addr=0x350 ncr_5380=1
72 * for a port mapped NCR5380 board or
73 * modprobe g_NCR5380 ncr_irq=255 ncr_addr=0xc8000 ncr_53c400=1
74 * for a memory mapped NCR53C400 board with interrupts disabled.
75 *
76 * 255 should be specified for no or DMA interrupt, 254 to autoprobe for an
77 * IRQ line if overridden on the command line.
78 *
79 */
80
1da177e4
LT		 81/* settings for DTC3181E card with only Mustek scanner attached */
82#define USLEEP
83#define USLEEP_POLL 1
84#define USLEEP_SLEEP 20
85#define USLEEP_WAITLONG 500
86
87#define AUTOPROBE_IRQ
88#define AUTOSENSE
89
1da177e4
LT		 90
91#ifdef CONFIG_SCSI_GENERIC_NCR53C400
92#define NCR53C400_PSEUDO_DMA 1
93#define PSEUDO_DMA
94#define NCR53C400
95#define NCR5380_STATS
96#undef NCR5380_STAT_LIMIT
97#endif
98
1da177e4
LT		 99#include <asm/io.h>
100#include <linux/signal.h>
1da177e4
LT		 101#include <linux/blkdev.h>
102#include "scsi.h"
103#include <scsi/scsi_host.h>
104#include "g_NCR5380.h"
105#include "NCR5380.h"
106#include <linux/stat.h>
107#include <linux/init.h>
108#include <linux/ioport.h>
109#include <linux/isapnp.h>
110#include <linux/delay.h>
111#include <linux/interrupt.h>
112
113#define NCR_NOT_SET 0
114static int ncr_irq = NCR_NOT_SET;
115static int ncr_dma = NCR_NOT_SET;
116static int ncr_addr = NCR_NOT_SET;
117static int ncr_5380 = NCR_NOT_SET;
118static int ncr_53c400 = NCR_NOT_SET;
119static int ncr_53c400a = NCR_NOT_SET;
120static int dtc_3181e = NCR_NOT_SET;
121
122static struct override {
c818cb64 123 NCR5380_map_type NCR5380_map_name;
1da177e4
LT		 124 int irq;
125 int dma;
126 int board; /* Use NCR53c400, Ricoh, etc. extensions ? */
127} overrides
128#ifdef GENERIC_NCR5380_OVERRIDE
129[] __initdata = GENERIC_NCR5380_OVERRIDE;
130#else
131[1] __initdata = { { 0,},};
132#endif
133
6391a113 134#define NO_OVERRIDES ARRAY_SIZE(overrides)
1da177e4 135
6391a113 136#ifndef MODULE
1da177e4
LT		 137
138/**
139 * internal_setup - handle lilo command string override
140 * @board: BOARD_* identifier for the board
141 * @str: unused
142 * @ints: numeric parameters
143 *
144 * Do LILO command line initialization of the overrides array. Display
145 * errors when needed
146 *
147 * Locks: none
148 */
149
150static void __init internal_setup(int board, char *str, int *ints)
151{
152 static int commandline_current = 0;
153 switch (board) {
154 case BOARD_NCR5380:
155 if (ints[0] != 2 && ints[0] != 3) {
156 printk(KERN_ERR "generic_NCR5380_setup : usage ncr5380=" STRVAL(NCR5380_map_name) ",irq,dma\n");
157 return;
158 }
159 break;
160 case BOARD_NCR53C400:
161 if (ints[0] != 2) {
162 printk(KERN_ERR "generic_NCR53C400_setup : usage ncr53c400=" STRVAL(NCR5380_map_name) ",irq\n");
163 return;
164 }
165 break;
166 case BOARD_NCR53C400A:
167 if (ints[0] != 2) {
168 printk(KERN_ERR "generic_NCR53C400A_setup : usage ncr53c400a=" STRVAL(NCR5380_map_name) ",irq\n");
169 return;
170 }
171 break;
172 case BOARD_DTC3181E:
173 if (ints[0] != 2) {
174 printk("generic_DTC3181E_setup : usage dtc3181e=" STRVAL(NCR5380_map_name) ",irq\n");
175 return;
176 }
177 break;
178 }
179
180 if (commandline_current < NO_OVERRIDES) {
181 overrides[commandline_current].NCR5380_map_name = (NCR5380_map_type) ints[1];
182 overrides[commandline_current].irq = ints[2];
183 if (ints[0] == 3)
184 overrides[commandline_current].dma = ints[3];
185 else
186 overrides[commandline_current].dma = DMA_NONE;
187 overrides[commandline_current].board = board;
188 ++commandline_current;
189 }
190}
191
192
193/**
194 * do_NCR53C80_setup - set up entry point
195 * @str: unused
196 *
197 * Setup function invoked at boot to parse the ncr5380= command
198 * line.
199 */
200
201static int __init do_NCR5380_setup(char *str)
202{
203 int ints[10];
204
6391a113 205 get_options(str, ARRAY_SIZE(ints), ints);
1da177e4
LT		 206 internal_setup(BOARD_NCR5380, str, ints);
207 return 1;
208}
209
210/**
211 * do_NCR53C400_setup - set up entry point
212 * @str: unused
6391a113 213 * @ints: integer parameters from kernel setup code
1da177e4
LT		 214 *
215 * Setup function invoked at boot to parse the ncr53c400= command
216 * line.
217 */
218
219static int __init do_NCR53C400_setup(char *str)
220{
221 int ints[10];
222
6391a113 223 get_options(str, ARRAY_SIZE(ints), ints);
1da177e4
LT		 224 internal_setup(BOARD_NCR53C400, str, ints);
225 return 1;
226}
227
228/**
229 * do_NCR53C400A_setup - set up entry point
230 * @str: unused
6391a113 231 * @ints: integer parameters from kernel setup code
1da177e4
LT		 232 *
233 * Setup function invoked at boot to parse the ncr53c400a= command
234 * line.
235 */
236
237static int __init do_NCR53C400A_setup(char *str)
238{
239 int ints[10];
240
6391a113 241 get_options(str, ARRAY_SIZE(ints), ints);
1da177e4
LT		 242 internal_setup(BOARD_NCR53C400A, str, ints);
243 return 1;
244}
245
246/**
247 * do_DTC3181E_setup - set up entry point
248 * @str: unused
6391a113 249 * @ints: integer parameters from kernel setup code
1da177e4
LT		 250 *
251 * Setup function invoked at boot to parse the dtc3181e= command
252 * line.
253 */
254
255static int __init do_DTC3181E_setup(char *str)
256{
257 int ints[10];
258
6391a113 259 get_options(str, ARRAY_SIZE(ints), ints);
1da177e4
LT		 260 internal_setup(BOARD_DTC3181E, str, ints);
261 return 1;
262}
263
264#endif
265
266/**
267 * generic_NCR5380_detect - look for NCR5380 controllers
268 * @tpnt: the scsi template
269 *
270 * Scan for the present of NCR5380, NCR53C400, NCR53C400A, DTC3181E
271 * and DTC436(ISAPnP) controllers. If overrides have been set we use
272 * them.
273 *
274 * The caller supplied NCR5380_init function is invoked from here, before
275 * the interrupt line is taken.
276 *
277 * Locks: none
278 */
279
d0be4a7d 280int __init generic_NCR5380_detect(struct scsi_host_template * tpnt)
1da177e4
LT		 281{
282 static int current_override = 0;
702a98c6 283 int count;
1da177e4 284 unsigned int *ports;
702a98c6
OZ		 285#ifndef SCSI_G_NCR5380_MEM
286 int i;
1da177e4 287 unsigned long region_size = 16;
702a98c6 288#endif
1da177e4
LT		 289 static unsigned int __initdata ncr_53c400a_ports[] = {
290 0x280, 0x290, 0x300, 0x310, 0x330, 0x340, 0x348, 0x350, 0
291 };
292 static unsigned int __initdata dtc_3181e_ports[] = {
293 0x220, 0x240, 0x280, 0x2a0, 0x2c0, 0x300, 0x320, 0x340, 0
294 };
295 int flags = 0;
296 struct Scsi_Host *instance;
702a98c6 297#ifdef SCSI_G_NCR5380_MEM
c818cb64
AV		 298 unsigned long base;
299 void __iomem *iomem;
300#endif
1da177e4
LT		 301
302 if (ncr_irq != NCR_NOT_SET)
303 overrides[0].irq = ncr_irq;
304 if (ncr_dma != NCR_NOT_SET)
305 overrides[0].dma = ncr_dma;
306 if (ncr_addr != NCR_NOT_SET)
307 overrides[0].NCR5380_map_name = (NCR5380_map_type) ncr_addr;
308 if (ncr_5380 != NCR_NOT_SET)
309 overrides[0].board = BOARD_NCR5380;
310 else if (ncr_53c400 != NCR_NOT_SET)
311 overrides[0].board = BOARD_NCR53C400;
312 else if (ncr_53c400a != NCR_NOT_SET)
313 overrides[0].board = BOARD_NCR53C400A;
314 else if (dtc_3181e != NCR_NOT_SET)
315 overrides[0].board = BOARD_DTC3181E;
702a98c6 316#ifndef SCSI_G_NCR5380_MEM
1da177e4
LT		 317 if (!current_override && isapnp_present()) {
318 struct pnp_dev *dev = NULL;
319 count = 0;
320 while ((dev = pnp_find_dev(NULL, ISAPNP_VENDOR('D', 'T', 'C'), ISAPNP_FUNCTION(0x436e), dev))) {
321 if (count >= NO_OVERRIDES)
322 break;
c94babba 323 if (pnp_device_attach(dev) < 0)
1da177e4 324 continue;
1da177e4
LT		 325 if (pnp_activate_dev(dev) < 0) {
326 printk(KERN_ERR "dtc436e probe: activate failed\n");
327 pnp_device_detach(dev);
328 continue;
329 }
330 if (!pnp_port_valid(dev, 0)) {
331 printk(KERN_ERR "dtc436e probe: no valid port\n");
332 pnp_device_detach(dev);
333 continue;
334 }
335 if (pnp_irq_valid(dev, 0))
336 overrides[count].irq = pnp_irq(dev, 0);
337 else
338 overrides[count].irq = SCSI_IRQ_NONE;
339 if (pnp_dma_valid(dev, 0))
340 overrides[count].dma = pnp_dma(dev, 0);
341 else
342 overrides[count].dma = DMA_NONE;
343 overrides[count].NCR5380_map_name = (NCR5380_map_type) pnp_port_start(dev, 0);
344 overrides[count].board = BOARD_DTC3181E;
345 count++;
346 }
347 }
702a98c6 348#endif
1da177e4
LT		 349 tpnt->proc_name = "g_NCR5380";
350
351 for (count = 0; current_override < NO_OVERRIDES; ++current_override) {
352 if (!(overrides[current_override].NCR5380_map_name))
353 continue;
354
355 ports = NULL;
356 switch (overrides[current_override].board) {
357 case BOARD_NCR5380:
358 flags = FLAG_NO_PSEUDO_DMA;
359 break;
360 case BOARD_NCR53C400:
361 flags = FLAG_NCR53C400;
362 break;
363 case BOARD_NCR53C400A:
364 flags = FLAG_NO_PSEUDO_DMA;
365 ports = ncr_53c400a_ports;
366 break;
367 case BOARD_DTC3181E:
368 flags = FLAG_NO_PSEUDO_DMA | FLAG_DTC3181E;
369 ports = dtc_3181e_ports;
370 break;
371 }
372
702a98c6 373#ifndef SCSI_G_NCR5380_MEM
1da177e4
LT		 374 if (ports) {
375 /* wakeup sequence for the NCR53C400A and DTC3181E */
376
377 /* Disable the adapter and look for a free io port */
378 outb(0x59, 0x779);
379 outb(0xb9, 0x379);
380 outb(0xc5, 0x379);
381 outb(0xae, 0x379);
382 outb(0xa6, 0x379);
383 outb(0x00, 0x379);
384
385 if (overrides[current_override].NCR5380_map_name != PORT_AUTO)
386 for (i = 0; ports[i]; i++) {
387 if (!request_region(ports[i], 16, "ncr53c80"))
388 continue;
389 if (overrides[current_override].NCR5380_map_name == ports[i])
390 break;
391 release_region(ports[i], 16);
392 } else
393 for (i = 0; ports[i]; i++) {
394 if (!request_region(ports[i], 16, "ncr53c80"))
395 continue;
396 if (inb(ports[i]) == 0xff)
397 break;
398 release_region(ports[i], 16);
399 }
400 if (ports[i]) {
401 /* At this point we have our region reserved */
402 outb(0x59, 0x779);
403 outb(0xb9, 0x379);
404 outb(0xc5, 0x379);
405 outb(0xae, 0x379);
406 outb(0xa6, 0x379);
407 outb(0x80 | i, 0x379); /* set io port to be used */
408 outb(0xc0, ports[i] + 9);
409 if (inb(ports[i] + 9) != 0x80)
410 continue;
411 else
412 overrides[current_override].NCR5380_map_name = ports[i];
413 } else
414 continue;
415 }
416 else
417 {
418 /* Not a 53C400A style setup - just grab */
419 if(!(request_region(overrides[current_override].NCR5380_map_name, NCR5380_region_size, "ncr5380")))
420 continue;
421 region_size = NCR5380_region_size;
422 }
423#else
c818cb64
AV		 424 base = overrides[current_override].NCR5380_map_name;
425 if (!request_mem_region(base, NCR5380_region_size, "ncr5380"))
426 continue;
427 iomem = ioremap(base, NCR5380_region_size);
428 if (!iomem) {
429 release_mem_region(base, NCR5380_region_size);
1da177e4 430 continue;
c818cb64 431 }
1da177e4
LT		 432#endif
433 instance = scsi_register(tpnt, sizeof(struct NCR5380_hostdata));
434 if (instance == NULL) {
702a98c6 435#ifndef SCSI_G_NCR5380_MEM
1da177e4
LT		 436 release_region(overrides[current_override].NCR5380_map_name, region_size);
437#else
c818cb64
AV		 438 iounmap(iomem);
439 release_mem_region(base, NCR5380_region_size);
1da177e4
LT		 440#endif
441 continue;
442 }
443
444 instance->NCR5380_instance_name = overrides[current_override].NCR5380_map_name;
702a98c6 445#ifndef SCSI_G_NCR5380_MEM
1da177e4 446 instance->n_io_port = region_size;
c818cb64 447#else
702a98c6 448 ((struct NCR5380_hostdata *)instance->hostdata)->iomem = iomem;
1da177e4
LT		 449#endif
450
451 NCR5380_init(instance, flags);
452
453 if (overrides[current_override].irq != IRQ_AUTO)
454 instance->irq = overrides[current_override].irq;
455 else
456 instance->irq = NCR5380_probe_irq(instance, 0xffff);
457
458 if (instance->irq != SCSI_IRQ_NONE)
1e641664 459 if (request_irq(instance->irq, generic_NCR5380_intr,
4909cc2b 460 0, "NCR5380", instance)) {
1da177e4
LT		 461 printk(KERN_WARNING "scsi%d : IRQ%d not free, interrupts disabled\n", instance->host_no, instance->irq);
462 instance->irq = SCSI_IRQ_NONE;
463 }
464
465 if (instance->irq == SCSI_IRQ_NONE) {
466 printk(KERN_INFO "scsi%d : interrupts not enabled. for better interactive performance,\n", instance->host_no);
467 printk(KERN_INFO "scsi%d : please jumper the board for a free IRQ.\n", instance->host_no);
468 }
469
470 printk(KERN_INFO "scsi%d : at " STRVAL(NCR5380_map_name) " 0x%x", instance->host_no, (unsigned int) instance->NCR5380_instance_name);
471 if (instance->irq == SCSI_IRQ_NONE)
472 printk(" interrupts disabled");
473 else
474 printk(" irq %d", instance->irq);
475 printk(" options CAN_QUEUE=%d CMD_PER_LUN=%d release=%d", CAN_QUEUE, CMD_PER_LUN, GENERIC_NCR5380_PUBLIC_RELEASE);
476 NCR5380_print_options(instance);
477 printk("\n");
478
479 ++current_override;
480 ++count;
481 }
482 return count;
483}
484
485/**
486 * generic_NCR5380_info - reporting string
487 * @host: NCR5380 to report on
488 *
489 * Report driver information for the NCR5380
490 */
491
492const char *generic_NCR5380_info(struct Scsi_Host *host)
493{
494 static const char string[] = "Generic NCR5380/53C400 Driver";
495 return string;
496}
497
498/**
499 * generic_NCR5380_release_resources - free resources
500 * @instance: host adapter to clean up
501 *
502 * Free the generic interface resources from this adapter.
503 *
504 * Locks: none
505 */
506
507int generic_NCR5380_release_resources(struct Scsi_Host *instance)
508{
509 NCR5380_local_declare();
510 NCR5380_setup(instance);
511
512 if (instance->irq != SCSI_IRQ_NONE)
1e641664 513 free_irq(instance->irq, instance);
1da177e4
LT		 514 NCR5380_exit(instance);
515
702a98c6 516#ifndef SCSI_G_NCR5380_MEM
1da177e4
LT		 517 release_region(instance->NCR5380_instance_name, instance->n_io_port);
518#else
702a98c6 519 iounmap(((struct NCR5380_hostdata *)instance->hostdata)->iomem);
1da177e4
LT		 520 release_mem_region(instance->NCR5380_instance_name, NCR5380_region_size);
521#endif
522
523
524 return 0;
525}
526
527#ifdef BIOSPARAM
528/**
529 * generic_NCR5380_biosparam
530 * @disk: disk to compute geometry for
531 * @dev: device identifier for this disk
532 * @ip: sizes to fill in
533 *
534 * Generates a BIOS / DOS compatible H-C-S mapping for the specified
535 * device / size.
536 *
537 * XXX Most SCSI boards use this mapping, I could be incorrect. Someone
538 * using hard disks on a trantor should verify that this mapping
539 * corresponds to that used by the BIOS / ASPI driver by running the linux
540 * fdisk program and matching the H_C_S coordinates to what DOS uses.
541 *
542 * Locks: none
543 */
544
545static int
546generic_NCR5380_biosparam(struct scsi_device *sdev, struct block_device *bdev,
547 sector_t capacity, int *ip)
548{
549 ip[0] = 64;
550 ip[1] = 32;
551 ip[2] = capacity >> 11;
552 return 0;
553}
554#endif
555
8d9e0f46 556#ifdef NCR53C400_PSEUDO_DMA
1da177e4
LT		 557
558/**
559 * NCR5380_pread - pseudo DMA read
560 * @instance: adapter to read from
561 * @dst: buffer to read into
562 * @len: buffer length
563 *
25985edc 564 * Perform a pseudo DMA mode read from an NCR53C400 or equivalent
1da177e4
LT		 565 * controller
566 */
567
568static inline int NCR5380_pread(struct Scsi_Host *instance, unsigned char *dst, int len)
569{
570 int blocks = len / 128;
571 int start = 0;
572 int bl;
573
574 NCR5380_local_declare();
575 NCR5380_setup(instance);
576
577 NCR5380_write(C400_CONTROL_STATUS_REG, CSR_BASE | CSR_TRANS_DIR);
578 NCR5380_write(C400_BLOCK_COUNTER_REG, blocks);
579 while (1) {
580 if ((bl = NCR5380_read(C400_BLOCK_COUNTER_REG)) == 0) {
581 break;
582 }
583 if (NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_GATED_53C80_IRQ) {
584 printk(KERN_ERR "53C400r: Got 53C80_IRQ start=%d, blocks=%d\n", start, blocks);
585 return -1;
586 }
587 while (NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_HOST_BUF_NOT_RDY);
588
702a98c6 589#ifndef SCSI_G_NCR5380_MEM
1da177e4
LT		 590 {
591 int i;
592 for (i = 0; i < 128; i++)
593 dst[start + i] = NCR5380_read(C400_HOST_BUFFER);
594 }
595#else
702a98c6 596 /* implies SCSI_G_NCR5380_MEM */
c818cb64 597 memcpy_fromio(dst + start, iomem + NCR53C400_host_buffer, 128);
1da177e4
LT		 598#endif
599 start += 128;
600 blocks--;
601 }
602
603 if (blocks) {
604 while (NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_HOST_BUF_NOT_RDY)
605 {
606 // FIXME - no timeout
607 }
608
702a98c6 609#ifndef SCSI_G_NCR5380_MEM
1da177e4
LT		 610 {
611 int i;
612 for (i = 0; i < 128; i++)
613 dst[start + i] = NCR5380_read(C400_HOST_BUFFER);
614 }
615#else
702a98c6 616 /* implies SCSI_G_NCR5380_MEM */
c818cb64 617 memcpy_fromio(dst + start, iomem + NCR53C400_host_buffer, 128);
1da177e4
LT		 618#endif
619 start += 128;
620 blocks--;
621 }
622
623 if (!(NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_GATED_53C80_IRQ))
624 printk("53C400r: no 53C80 gated irq after transfer");
625
626#if 0
627 /*
628 * DON'T DO THIS - THEY NEVER ARRIVE!
629 */
630 printk("53C400r: Waiting for 53C80 registers\n");
631 while (NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_53C80_REG)
632 ;
633#endif
634 if (!(NCR5380_read(BUS_AND_STATUS_REG) & BASR_END_DMA_TRANSFER))
635 printk(KERN_ERR "53C400r: no end dma signal\n");
636
637 NCR5380_write(MODE_REG, MR_BASE);
638 NCR5380_read(RESET_PARITY_INTERRUPT_REG);
639 return 0;
640}
641
642/**
643 * NCR5380_write - pseudo DMA write
644 * @instance: adapter to read from
645 * @dst: buffer to read into
646 * @len: buffer length
647 *
25985edc 648 * Perform a pseudo DMA mode read from an NCR53C400 or equivalent
1da177e4
LT		 649 * controller
650 */
651
652static inline int NCR5380_pwrite(struct Scsi_Host *instance, unsigned char *src, int len)
653{
654 int blocks = len / 128;
655 int start = 0;
656 int bl;
657 int i;
658
659 NCR5380_local_declare();
660 NCR5380_setup(instance);
661
662 NCR5380_write(C400_CONTROL_STATUS_REG, CSR_BASE);
663 NCR5380_write(C400_BLOCK_COUNTER_REG, blocks);
664 while (1) {
665 if (NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_GATED_53C80_IRQ) {
666 printk(KERN_ERR "53C400w: Got 53C80_IRQ start=%d, blocks=%d\n", start, blocks);
667 return -1;
668 }
669
670 if ((bl = NCR5380_read(C400_BLOCK_COUNTER_REG)) == 0) {
671 break;
672 }
673 while (NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_HOST_BUF_NOT_RDY)
674 ; // FIXME - timeout
702a98c6 675#ifndef SCSI_G_NCR5380_MEM
1da177e4
LT		 676 {
677 for (i = 0; i < 128; i++)
678 NCR5380_write(C400_HOST_BUFFER, src[start + i]);
679 }
680#else
702a98c6 681 /* implies SCSI_G_NCR5380_MEM */
c818cb64 682 memcpy_toio(iomem + NCR53C400_host_buffer, src + start, 128);
1da177e4
LT		 683#endif
684 start += 128;
685 blocks--;
686 }
687 if (blocks) {
688 while (NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_HOST_BUF_NOT_RDY)
689 ; // FIXME - no timeout
690
702a98c6 691#ifndef SCSI_G_NCR5380_MEM
1da177e4
LT		 692 {
693 for (i = 0; i < 128; i++)
694 NCR5380_write(C400_HOST_BUFFER, src[start + i]);
695 }
696#else
702a98c6 697 /* implies SCSI_G_NCR5380_MEM */
c818cb64 698 memcpy_toio(iomem + NCR53C400_host_buffer, src + start, 128);
1da177e4
LT		 699#endif
700 start += 128;
701 blocks--;
702 }
703
704#if 0
705 printk("53C400w: waiting for registers to be available\n");
706 THEY NEVER DO ! while (NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_53C80_REG);
707 printk("53C400w: Got em\n");
708#endif
709
710 /* Let's wait for this instead - could be ugly */
711 /* All documentation says to check for this. Maybe my hardware is too
712 * fast. Waiting for it seems to work fine! KLL
713 */
714 while (!(i = NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_GATED_53C80_IRQ))
715 ; // FIXME - no timeout
716
717 /*
718 * I know. i is certainly != 0 here but the loop is new. See previous
719 * comment.
720 */
721 if (i) {
722 if (!((i = NCR5380_read(BUS_AND_STATUS_REG)) & BASR_END_DMA_TRANSFER))
723 printk(KERN_ERR "53C400w: No END OF DMA bit - WHOOPS! BASR=%0x\n", i);
724 } else
725 printk(KERN_ERR "53C400w: no 53C80 gated irq after transfer (last block)\n");
726
727#if 0
728 if (!(NCR5380_read(BUS_AND_STATUS_REG) & BASR_END_DMA_TRANSFER)) {
729 printk(KERN_ERR "53C400w: no end dma signal\n");
730 }
731#endif
732 while (!(NCR5380_read(TARGET_COMMAND_REG) & TCR_LAST_BYTE_SENT))
733 ; // TIMEOUT
734 return 0;
735}
736#endif /* PSEUDO_DMA */
737
738/*
739 * Include the NCR5380 core code that we build our driver around
740 */
741
742#include "NCR5380.c"
743
dd7ab71b 744#define PRINTP(x) seq_printf(m, x)
1da177e4
LT		 745#define ANDP ,
746
dd7ab71b 747static void sprint_opcode(struct seq_file *m, int opcode)
1da177e4 748{
1da177e4 749 PRINTP("0x%02x " ANDP opcode);
1da177e4
LT		 750}
751
dd7ab71b 752static void sprint_command(struct seq_file *m, unsigned char *command)
1da177e4 753{
dd7ab71b
AV		 754 int i, s;
755 sprint_opcode(m, command[0]);
1da177e4
LT		 756 for (i = 1, s = COMMAND_SIZE(command[0]); i < s; ++i)
757 PRINTP("%02x " ANDP command[i]);
758 PRINTP("\n");
1da177e4
LT		 759}
760
761/**
762 * sprintf_Scsi_Cmnd - print a scsi command
dd7ab71b 763 * @m: seq_fil to print into
1da177e4
LT		 764 * @cmd: SCSI command block
765 *
766 * Print out the target and command data in hex
767 */
768
dd7ab71b 769static void sprint_Scsi_Cmnd(struct seq_file *m, Scsi_Cmnd * cmd)
1da177e4 770{
9cb78c16 771 PRINTP("host number %d destination target %d, lun %llu\n" ANDP cmd->device->host->host_no ANDP cmd->device->id ANDP cmd->device->lun);
1da177e4 772 PRINTP(" command = ");
dd7ab71b 773 sprint_command(m, cmd->cmnd);
1da177e4
LT		 774}
775
776/**
777 * generic_NCR5380_proc_info - /proc for NCR5380 driver
778 * @buffer: buffer to print into
779 * @start: start position
780 * @offset: offset into buffer
781 * @len: length
782 * @hostno: instance to affect
783 * @inout: read/write
784 *
785 * Provide the procfs information for the 5380 controller. We fill
786 * this with useful debugging information including the commands
787 * being executed, disconnected command queue and the statistical
788 * data
789 *
790 * Locks: global cli/lock for queue walk
791 */
792
dd7ab71b 793static int generic_NCR5380_show_info(struct seq_file *m, struct Scsi_Host *scsi_ptr)
1da177e4 794{
1da177e4
LT		 795 NCR5380_local_declare();
796 unsigned long flags;
797 unsigned char status;
798 int i;
799 Scsi_Cmnd *ptr;
800 struct NCR5380_hostdata *hostdata;
801#ifdef NCR5380_STATS
f64a181d 802 struct scsi_device *dev;
1da177e4
LT		 803#endif
804
805 NCR5380_setup(scsi_ptr);
806 hostdata = (struct NCR5380_hostdata *) scsi_ptr->hostdata;
807
808 spin_lock_irqsave(scsi_ptr->host_lock, flags);
809 PRINTP("SCSI host number %d : %s\n" ANDP scsi_ptr->host_no ANDP scsi_ptr->hostt->name);
810 PRINTP("Generic NCR5380 driver version %d\n" ANDP GENERIC_NCR5380_PUBLIC_RELEASE);
811 PRINTP("NCR5380 core version %d\n" ANDP NCR5380_PUBLIC_RELEASE);
812#ifdef NCR53C400
813 PRINTP("NCR53C400 extension version %d\n" ANDP NCR53C400_PUBLIC_RELEASE);
814 PRINTP("NCR53C400 card%s detected\n" ANDP(((struct NCR5380_hostdata *) scsi_ptr->hostdata)->flags & FLAG_NCR53C400) ? "" : " not");
815# if NCR53C400_PSEUDO_DMA
816 PRINTP("NCR53C400 pseudo DMA used\n");
817# endif
818#else
819 PRINTP("NO NCR53C400 driver extensions\n");
820#endif
821 PRINTP("Using %s mapping at %s 0x%lx, " ANDP STRVAL(NCR5380_map_config) ANDP STRVAL(NCR5380_map_name) ANDP scsi_ptr->NCR5380_instance_name);
822 if (scsi_ptr->irq == SCSI_IRQ_NONE)
823 PRINTP("no interrupt\n");
824 else
825 PRINTP("on interrupt %d\n" ANDP scsi_ptr->irq);
826
827#ifdef NCR5380_STATS
828 if (hostdata->connected || hostdata->issue_queue || hostdata->disconnected_queue)
829 PRINTP("There are commands pending, transfer rates may be crud\n");
830 if (hostdata->pendingr)
831 PRINTP(" %d pending reads" ANDP hostdata->pendingr);
832 if (hostdata->pendingw)
833 PRINTP(" %d pending writes" ANDP hostdata->pendingw);
834 if (hostdata->pendingr || hostdata->pendingw)
835 PRINTP("\n");
836 shost_for_each_device(dev, scsi_ptr) {
837 unsigned long br = hostdata->bytes_read[dev->id];
838 unsigned long bw = hostdata->bytes_write[dev->id];
839 long tr = hostdata->time_read[dev->id] / HZ;
840 long tw = hostdata->time_write[dev->id] / HZ;
841
4ff36718 842 PRINTP(" T:%d %s " ANDP dev->id ANDP scsi_device_type(dev->type));
1da177e4
LT		 843 for (i = 0; i < 8; i++)
844 if (dev->vendor[i] >= 0x20)
dd7ab71b
AV		 845 seq_putc(m, dev->vendor[i]);
846 seq_putc(m, ' ');
1da177e4
LT		 847 for (i = 0; i < 16; i++)
848 if (dev->model[i] >= 0x20)
dd7ab71b
AV		 849 seq_putc(m, dev->model[i]);
850 seq_putc(m, ' ');
1da177e4
LT		 851 for (i = 0; i < 4; i++)
852 if (dev->rev[i] >= 0x20)
dd7ab71b
AV		 853 seq_putc(m, dev->rev[i]);
854 seq_putc(m, ' ');
1da177e4
LT		 855
856 PRINTP("\n%10ld kb read in %5ld secs" ANDP br / 1024 ANDP tr);
857 if (tr)
858 PRINTP(" @ %5ld bps" ANDP br / tr);
859
860 PRINTP("\n%10ld kb written in %5ld secs" ANDP bw / 1024 ANDP tw);
861 if (tw)
862 PRINTP(" @ %5ld bps" ANDP bw / tw);
863 PRINTP("\n");
864 }
865#endif
866
867 status = NCR5380_read(STATUS_REG);
868 if (!(status & SR_REQ))
869 PRINTP("REQ not asserted, phase unknown.\n");
870 else {
871 for (i = 0; (phases[i].value != PHASE_UNKNOWN) && (phases[i].value != (status & PHASE_MASK)); ++i);
872 PRINTP("Phase %s\n" ANDP phases[i].name);
873 }
874
875 if (!hostdata->connected) {
876 PRINTP("No currently connected command\n");
877 } else {
dd7ab71b 878 sprint_Scsi_Cmnd(m, (Scsi_Cmnd *) hostdata->connected);
1da177e4
LT		 879 }
880
881 PRINTP("issue_queue\n");
882
883 for (ptr = (Scsi_Cmnd *) hostdata->issue_queue; ptr; ptr = (Scsi_Cmnd *) ptr->host_scribble)
dd7ab71b 884 sprint_Scsi_Cmnd(m, ptr);
1da177e4
LT		 885
886 PRINTP("disconnected_queue\n");
887
888 for (ptr = (Scsi_Cmnd *) hostdata->disconnected_queue; ptr; ptr = (Scsi_Cmnd *) ptr->host_scribble)
dd7ab71b 889 sprint_Scsi_Cmnd(m, ptr);
1da177e4 890
1da177e4 891 spin_unlock_irqrestore(scsi_ptr->host_lock, flags);
dd7ab71b 892 return 0;
1da177e4
LT		 893}
894
895#undef PRINTP
896#undef ANDP
897
d0be4a7d 898static struct scsi_host_template driver_template = {
dd7ab71b 899 .show_info = generic_NCR5380_show_info,
1da177e4
LT		 900 .name = "Generic NCR5380/NCR53C400 Scsi Driver",
901 .detect = generic_NCR5380_detect,
902 .release = generic_NCR5380_release_resources,
903 .info = generic_NCR5380_info,
904 .queuecommand = generic_NCR5380_queue_command,
905 .eh_abort_handler = generic_NCR5380_abort,
906 .eh_bus_reset_handler = generic_NCR5380_bus_reset,
1da177e4
LT		 907 .bios_param = NCR5380_BIOSPARAM,
908 .can_queue = CAN_QUEUE,
909 .this_id = 7,
910 .sg_tablesize = SG_ALL,
911 .cmd_per_lun = CMD_PER_LUN,
912 .use_clustering = DISABLE_CLUSTERING,
913};
914#include <linux/module.h>
915#include "scsi_module.c"
916
917module_param(ncr_irq, int, 0);
918module_param(ncr_dma, int, 0);
919module_param(ncr_addr, int, 0);
920module_param(ncr_5380, int, 0);
921module_param(ncr_53c400, int, 0);
922module_param(ncr_53c400a, int, 0);
923module_param(dtc_3181e, int, 0);
924MODULE_LICENSE("GPL");
925
702a98c6 926#ifndef SCSI_G_NCR5380_MEM
6f039790 927static struct isapnp_device_id id_table[] = {
1da177e4
LT		 928 {
929 ISAPNP_ANY_ID, ISAPNP_ANY_ID,
930 ISAPNP_VENDOR('D', 'T', 'C'), ISAPNP_FUNCTION(0x436e),
931 0},
932 {0}
933};
934
935MODULE_DEVICE_TABLE(isapnp, id_table);
702a98c6 936#endif
1da177e4
LT		 937
938__setup("ncr5380=", do_NCR5380_setup);
939__setup("ncr53c400=", do_NCR53C400_setup);
940__setup("ncr53c400a=", do_NCR53C400A_setup);
941__setup("dtc3181e=", do_DTC3181E_setup);
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