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ncr5380: Introduce NCR5380_poll_politely2
[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
1da177e4
LT		 21 */
22
23/*
24 * TODO : flesh out DMA support, find some one actually using this (I have
25 * a memory mapped Trantor board that works fine)
26 */
27
28/*
1da177e4
LT		 29 * The card is detected and initialized in one of several ways :
30 * 1. With command line overrides - NCR5380=port,irq may be
31 * used on the LILO command line to override the defaults.
32 *
33 * 2. With the GENERIC_NCR5380_OVERRIDE compile time define. This is
34 * specified as an array of address, irq, dma, board tuples. Ie, for
35 * one board at 0x350, IRQ5, no dma, I could say
36 * -DGENERIC_NCR5380_OVERRIDE={{0xcc000, 5, DMA_NONE, BOARD_NCR5380}}
37 *
38 * -1 should be specified for no or DMA interrupt, -2 to autoprobe for an
39 * IRQ line if overridden on the command line.
40 *
41 * 3. When included as a module, with arguments passed on the command line:
42 * ncr_irq=xx the interrupt
43 * ncr_addr=xx the port or base address (for port or memory
44 * mapped, resp.)
45 * ncr_dma=xx the DMA
46 * ncr_5380=1 to set up for a NCR5380 board
47 * ncr_53c400=1 to set up for a NCR53C400 board
48 * e.g.
49 * modprobe g_NCR5380 ncr_irq=5 ncr_addr=0x350 ncr_5380=1
50 * for a port mapped NCR5380 board or
51 * modprobe g_NCR5380 ncr_irq=255 ncr_addr=0xc8000 ncr_53c400=1
52 * for a memory mapped NCR53C400 board with interrupts disabled.
53 *
54 * 255 should be specified for no or DMA interrupt, 254 to autoprobe for an
55 * IRQ line if overridden on the command line.
56 *
57 */
58
1da177e4 59#define AUTOPROBE_IRQ
1da177e4
LT		 60
61#ifdef CONFIG_SCSI_GENERIC_NCR53C400
1da177e4 62#define PSEUDO_DMA
1da177e4
LT		 63#endif
64
1da177e4
LT		 65#include <asm/io.h>
66#include <linux/signal.h>
1da177e4 67#include <linux/blkdev.h>
1da177e4
LT		 68#include <scsi/scsi_host.h>
69#include "g_NCR5380.h"
70#include "NCR5380.h"
71#include <linux/stat.h>
72#include <linux/init.h>
73#include <linux/ioport.h>
74#include <linux/isapnp.h>
75#include <linux/delay.h>
76#include <linux/interrupt.h>
77
c0965e63
FT		 78static int ncr_irq;
79static int ncr_dma;
80static int ncr_addr;
81static int ncr_5380;
82static int ncr_53c400;
83static int ncr_53c400a;
84static int dtc_3181e;
1da177e4
LT		 85
86static struct override {
c818cb64 87 NCR5380_map_type NCR5380_map_name;
1da177e4
LT		 88 int irq;
89 int dma;
90 int board; /* Use NCR53c400, Ricoh, etc. extensions ? */
91} overrides
92#ifdef GENERIC_NCR5380_OVERRIDE
93[] __initdata = GENERIC_NCR5380_OVERRIDE;
94#else
95[1] __initdata = { { 0,},};
96#endif
97
6391a113 98#define NO_OVERRIDES ARRAY_SIZE(overrides)
1da177e4 99
6391a113 100#ifndef MODULE
1da177e4
LT		 101
102/**
103 * internal_setup - handle lilo command string override
104 * @board: BOARD_* identifier for the board
105 * @str: unused
106 * @ints: numeric parameters
107 *
108 * Do LILO command line initialization of the overrides array. Display
109 * errors when needed
110 *
111 * Locks: none
112 */
113
114static void __init internal_setup(int board, char *str, int *ints)
115{
d5f7e65d 116 static int commandline_current;
1da177e4
LT		 117 switch (board) {
118 case BOARD_NCR5380:
119 if (ints[0] != 2 && ints[0] != 3) {
120 printk(KERN_ERR "generic_NCR5380_setup : usage ncr5380=" STRVAL(NCR5380_map_name) ",irq,dma\n");
121 return;
122 }
123 break;
124 case BOARD_NCR53C400:
125 if (ints[0] != 2) {
126 printk(KERN_ERR "generic_NCR53C400_setup : usage ncr53c400=" STRVAL(NCR5380_map_name) ",irq\n");
127 return;
128 }
129 break;
130 case BOARD_NCR53C400A:
131 if (ints[0] != 2) {
132 printk(KERN_ERR "generic_NCR53C400A_setup : usage ncr53c400a=" STRVAL(NCR5380_map_name) ",irq\n");
133 return;
134 }
135 break;
136 case BOARD_DTC3181E:
137 if (ints[0] != 2) {
138 printk("generic_DTC3181E_setup : usage dtc3181e=" STRVAL(NCR5380_map_name) ",irq\n");
139 return;
140 }
141 break;
142 }
143
144 if (commandline_current < NO_OVERRIDES) {
145 overrides[commandline_current].NCR5380_map_name = (NCR5380_map_type) ints[1];
146 overrides[commandline_current].irq = ints[2];
147 if (ints[0] == 3)
148 overrides[commandline_current].dma = ints[3];
149 else
150 overrides[commandline_current].dma = DMA_NONE;
151 overrides[commandline_current].board = board;
152 ++commandline_current;
153 }
154}
155
156
157/**
158 * do_NCR53C80_setup - set up entry point
159 * @str: unused
160 *
161 * Setup function invoked at boot to parse the ncr5380= command
162 * line.
163 */
164
165static int __init do_NCR5380_setup(char *str)
166{
167 int ints[10];
168
6391a113 169 get_options(str, ARRAY_SIZE(ints), ints);
1da177e4
LT		 170 internal_setup(BOARD_NCR5380, str, ints);
171 return 1;
172}
173
174/**
175 * do_NCR53C400_setup - set up entry point
176 * @str: unused
6391a113 177 * @ints: integer parameters from kernel setup code
1da177e4
LT		 178 *
179 * Setup function invoked at boot to parse the ncr53c400= command
180 * line.
181 */
182
183static int __init do_NCR53C400_setup(char *str)
184{
185 int ints[10];
186
6391a113 187 get_options(str, ARRAY_SIZE(ints), ints);
1da177e4
LT		 188 internal_setup(BOARD_NCR53C400, str, ints);
189 return 1;
190}
191
192/**
193 * do_NCR53C400A_setup - set up entry point
194 * @str: unused
6391a113 195 * @ints: integer parameters from kernel setup code
1da177e4
LT		 196 *
197 * Setup function invoked at boot to parse the ncr53c400a= command
198 * line.
199 */
200
201static int __init do_NCR53C400A_setup(char *str)
202{
203 int ints[10];
204
6391a113 205 get_options(str, ARRAY_SIZE(ints), ints);
1da177e4
LT		 206 internal_setup(BOARD_NCR53C400A, str, ints);
207 return 1;
208}
209
210/**
211 * do_DTC3181E_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 dtc3181e= command
216 * line.
217 */
218
219static int __init do_DTC3181E_setup(char *str)
220{
221 int ints[10];
222
6391a113 223 get_options(str, ARRAY_SIZE(ints), ints);
1da177e4
LT		 224 internal_setup(BOARD_DTC3181E, str, ints);
225 return 1;
226}
227
228#endif
229
230/**
231 * generic_NCR5380_detect - look for NCR5380 controllers
232 * @tpnt: the scsi template
233 *
234 * Scan for the present of NCR5380, NCR53C400, NCR53C400A, DTC3181E
235 * and DTC436(ISAPnP) controllers. If overrides have been set we use
236 * them.
237 *
1da177e4
LT		 238 * Locks: none
239 */
240
ed8b9e7f 241static int __init generic_NCR5380_detect(struct scsi_host_template *tpnt)
1da177e4 242{
d5f7e65d 243 static int current_override;
702a98c6 244 int count;
1da177e4 245 unsigned int *ports;
702a98c6
OZ		 246#ifndef SCSI_G_NCR5380_MEM
247 int i;
1da177e4 248 unsigned long region_size = 16;
702a98c6 249#endif
1da177e4
LT		 250 static unsigned int __initdata ncr_53c400a_ports[] = {
251 0x280, 0x290, 0x300, 0x310, 0x330, 0x340, 0x348, 0x350, 0
252 };
253 static unsigned int __initdata dtc_3181e_ports[] = {
254 0x220, 0x240, 0x280, 0x2a0, 0x2c0, 0x300, 0x320, 0x340, 0
255 };
4d8c08c7 256 int flags;
1da177e4 257 struct Scsi_Host *instance;
702a98c6 258#ifdef SCSI_G_NCR5380_MEM
c818cb64
AV		 259 unsigned long base;
260 void __iomem *iomem;
261#endif
1da177e4 262
c0965e63 263 if (ncr_irq)
1da177e4 264 overrides[0].irq = ncr_irq;
c0965e63 265 if (ncr_dma)
1da177e4 266 overrides[0].dma = ncr_dma;
c0965e63 267 if (ncr_addr)
1da177e4 268 overrides[0].NCR5380_map_name = (NCR5380_map_type) ncr_addr;
c0965e63 269 if (ncr_5380)
1da177e4 270 overrides[0].board = BOARD_NCR5380;
c0965e63 271 else if (ncr_53c400)
1da177e4 272 overrides[0].board = BOARD_NCR53C400;
c0965e63 273 else if (ncr_53c400a)
1da177e4 274 overrides[0].board = BOARD_NCR53C400A;
c0965e63 275 else if (dtc_3181e)
1da177e4 276 overrides[0].board = BOARD_DTC3181E;
702a98c6 277#ifndef SCSI_G_NCR5380_MEM
1da177e4
LT		 278 if (!current_override && isapnp_present()) {
279 struct pnp_dev *dev = NULL;
280 count = 0;
281 while ((dev = pnp_find_dev(NULL, ISAPNP_VENDOR('D', 'T', 'C'), ISAPNP_FUNCTION(0x436e), dev))) {
282 if (count >= NO_OVERRIDES)
283 break;
c94babba 284 if (pnp_device_attach(dev) < 0)
1da177e4 285 continue;
1da177e4
LT		 286 if (pnp_activate_dev(dev) < 0) {
287 printk(KERN_ERR "dtc436e probe: activate failed\n");
288 pnp_device_detach(dev);
289 continue;
290 }
291 if (!pnp_port_valid(dev, 0)) {
292 printk(KERN_ERR "dtc436e probe: no valid port\n");
293 pnp_device_detach(dev);
294 continue;
295 }
296 if (pnp_irq_valid(dev, 0))
297 overrides[count].irq = pnp_irq(dev, 0);
298 else
22f5f10d 299 overrides[count].irq = NO_IRQ;
1da177e4
LT		 300 if (pnp_dma_valid(dev, 0))
301 overrides[count].dma = pnp_dma(dev, 0);
302 else
303 overrides[count].dma = DMA_NONE;
304 overrides[count].NCR5380_map_name = (NCR5380_map_type) pnp_port_start(dev, 0);
305 overrides[count].board = BOARD_DTC3181E;
306 count++;
307 }
308 }
702a98c6 309#endif
1da177e4
LT		 310 tpnt->proc_name = "g_NCR5380";
311
312 for (count = 0; current_override < NO_OVERRIDES; ++current_override) {
313 if (!(overrides[current_override].NCR5380_map_name))
314 continue;
315
316 ports = NULL;
4d8c08c7 317 flags = 0;
1da177e4
LT		 318 switch (overrides[current_override].board) {
319 case BOARD_NCR5380:
320 flags = FLAG_NO_PSEUDO_DMA;
321 break;
322 case BOARD_NCR53C400:
4d8c08c7 323#ifdef PSEUDO_DMA
1da177e4 324 flags = FLAG_NCR53C400;
4d8c08c7 325#endif
1da177e4
LT		 326 break;
327 case BOARD_NCR53C400A:
328 flags = FLAG_NO_PSEUDO_DMA;
329 ports = ncr_53c400a_ports;
330 break;
331 case BOARD_DTC3181E:
332 flags = FLAG_NO_PSEUDO_DMA | FLAG_DTC3181E;
333 ports = dtc_3181e_ports;
334 break;
335 }
336
702a98c6 337#ifndef SCSI_G_NCR5380_MEM
1da177e4
LT		 338 if (ports) {
339 /* wakeup sequence for the NCR53C400A and DTC3181E */
340
341 /* Disable the adapter and look for a free io port */
342 outb(0x59, 0x779);
343 outb(0xb9, 0x379);
344 outb(0xc5, 0x379);
345 outb(0xae, 0x379);
346 outb(0xa6, 0x379);
347 outb(0x00, 0x379);
348
349 if (overrides[current_override].NCR5380_map_name != PORT_AUTO)
350 for (i = 0; ports[i]; i++) {
351 if (!request_region(ports[i], 16, "ncr53c80"))
352 continue;
353 if (overrides[current_override].NCR5380_map_name == ports[i])
354 break;
355 release_region(ports[i], 16);
356 } else
357 for (i = 0; ports[i]; i++) {
358 if (!request_region(ports[i], 16, "ncr53c80"))
359 continue;
360 if (inb(ports[i]) == 0xff)
361 break;
362 release_region(ports[i], 16);
363 }
364 if (ports[i]) {
365 /* At this point we have our region reserved */
366 outb(0x59, 0x779);
367 outb(0xb9, 0x379);
368 outb(0xc5, 0x379);
369 outb(0xae, 0x379);
370 outb(0xa6, 0x379);
371 outb(0x80 | i, 0x379); /* set io port to be used */
372 outb(0xc0, ports[i] + 9);
373 if (inb(ports[i] + 9) != 0x80)
374 continue;
375 else
376 overrides[current_override].NCR5380_map_name = ports[i];
377 } else
378 continue;
379 }
380 else
381 {
382 /* Not a 53C400A style setup - just grab */
383 if(!(request_region(overrides[current_override].NCR5380_map_name, NCR5380_region_size, "ncr5380")))
384 continue;
385 region_size = NCR5380_region_size;
386 }
387#else
c818cb64
AV		 388 base = overrides[current_override].NCR5380_map_name;
389 if (!request_mem_region(base, NCR5380_region_size, "ncr5380"))
390 continue;
391 iomem = ioremap(base, NCR5380_region_size);
392 if (!iomem) {
393 release_mem_region(base, NCR5380_region_size);
1da177e4 394 continue;
c818cb64 395 }
1da177e4
LT		 396#endif
397 instance = scsi_register(tpnt, sizeof(struct NCR5380_hostdata));
0ad0eff9
FT		 398 if (instance == NULL)
399 goto out_release;
1da177e4 400
702a98c6 401#ifndef SCSI_G_NCR5380_MEM
b01ec348 402 instance->io_port = overrides[current_override].NCR5380_map_name;
1da177e4 403 instance->n_io_port = region_size;
4d8c08c7
FT		 404
405 /*
406 * On NCR53C400 boards, NCR5380 registers are mapped 8 past
407 * the base address.
408 */
409 if (overrides[current_override].board == BOARD_NCR53C400)
410 instance->io_port += 8;
c818cb64 411#else
b01ec348 412 instance->base = overrides[current_override].NCR5380_map_name;
702a98c6 413 ((struct NCR5380_hostdata *)instance->hostdata)->iomem = iomem;
1da177e4
LT		 414#endif
415
0ad0eff9
FT		 416 if (NCR5380_init(instance, flags))
417 goto out_unregister;
1da177e4 418
4d8c08c7
FT		 419 if (overrides[current_override].board == BOARD_NCR53C400)
420 NCR5380_write(C400_CONTROL_STATUS_REG, CSR_BASE);
421
b6488f97
FT		 422 NCR5380_maybe_reset_bus(instance);
423
1da177e4
LT		 424 if (overrides[current_override].irq != IRQ_AUTO)
425 instance->irq = overrides[current_override].irq;
426 else
427 instance->irq = NCR5380_probe_irq(instance, 0xffff);
428
22f5f10d
FT		 429 /* Compatibility with documented NCR5380 kernel parameters */
430 if (instance->irq == 255)
431 instance->irq = NO_IRQ;
432
433 if (instance->irq != NO_IRQ)
1e641664 434 if (request_irq(instance->irq, generic_NCR5380_intr,
4909cc2b 435 0, "NCR5380", instance)) {
1da177e4 436 printk(KERN_WARNING "scsi%d : IRQ%d not free, interrupts disabled\n", instance->host_no, instance->irq);
22f5f10d 437 instance->irq = NO_IRQ;
1da177e4
LT		 438 }
439
22f5f10d 440 if (instance->irq == NO_IRQ) {
1da177e4
LT		 441 printk(KERN_INFO "scsi%d : interrupts not enabled. for better interactive performance,\n", instance->host_no);
442 printk(KERN_INFO "scsi%d : please jumper the board for a free IRQ.\n", instance->host_no);
443 }
444
1da177e4
LT		 445 ++current_override;
446 ++count;
447 }
448 return count;
0ad0eff9
FT		 449
450out_unregister:
451 scsi_unregister(instance);
452out_release:
453#ifndef SCSI_G_NCR5380_MEM
454 release_region(overrides[current_override].NCR5380_map_name, region_size);
455#else
456 iounmap(iomem);
457 release_mem_region(base, NCR5380_region_size);
458#endif
459 return count;
1da177e4
LT		 460}
461
1da177e4
LT		 462/**
463 * generic_NCR5380_release_resources - free resources
464 * @instance: host adapter to clean up
465 *
466 * Free the generic interface resources from this adapter.
467 *
468 * Locks: none
469 */
470
ed8b9e7f 471static int generic_NCR5380_release_resources(struct Scsi_Host *instance)
1da177e4 472{
22f5f10d 473 if (instance->irq != NO_IRQ)
1e641664 474 free_irq(instance->irq, instance);
1da177e4 475 NCR5380_exit(instance);
702a98c6 476#ifndef SCSI_G_NCR5380_MEM
b01ec348 477 release_region(instance->io_port, instance->n_io_port);
1da177e4 478#else
702a98c6 479 iounmap(((struct NCR5380_hostdata *)instance->hostdata)->iomem);
b01ec348 480 release_mem_region(instance->base, NCR5380_region_size);
1da177e4 481#endif
1da177e4
LT		 482 return 0;
483}
484
485#ifdef BIOSPARAM
486/**
487 * generic_NCR5380_biosparam
488 * @disk: disk to compute geometry for
489 * @dev: device identifier for this disk
490 * @ip: sizes to fill in
491 *
492 * Generates a BIOS / DOS compatible H-C-S mapping for the specified
493 * device / size.
494 *
495 * XXX Most SCSI boards use this mapping, I could be incorrect. Someone
496 * using hard disks on a trantor should verify that this mapping
497 * corresponds to that used by the BIOS / ASPI driver by running the linux
498 * fdisk program and matching the H_C_S coordinates to what DOS uses.
499 *
500 * Locks: none
501 */
502
503static int
504generic_NCR5380_biosparam(struct scsi_device *sdev, struct block_device *bdev,
505 sector_t capacity, int *ip)
506{
507 ip[0] = 64;
508 ip[1] = 32;
509 ip[2] = capacity >> 11;
510 return 0;
511}
512#endif
513
4d8c08c7 514#ifdef PSEUDO_DMA
1da177e4
LT		 515
516/**
517 * NCR5380_pread - pseudo DMA read
518 * @instance: adapter to read from
519 * @dst: buffer to read into
520 * @len: buffer length
521 *
25985edc 522 * Perform a pseudo DMA mode read from an NCR53C400 or equivalent
1da177e4
LT		 523 * controller
524 */
525
526static inline int NCR5380_pread(struct Scsi_Host *instance, unsigned char *dst, int len)
527{
54d8fe44
FT		 528#ifdef SCSI_G_NCR5380_MEM
529 struct NCR5380_hostdata *hostdata = shost_priv(instance);
530#endif
1da177e4
LT		 531 int blocks = len / 128;
532 int start = 0;
533 int bl;
534
1da177e4
LT		 535 NCR5380_write(C400_CONTROL_STATUS_REG, CSR_BASE | CSR_TRANS_DIR);
536 NCR5380_write(C400_BLOCK_COUNTER_REG, blocks);
537 while (1) {
538 if ((bl = NCR5380_read(C400_BLOCK_COUNTER_REG)) == 0) {
539 break;
540 }
541 if (NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_GATED_53C80_IRQ) {
542 printk(KERN_ERR "53C400r: Got 53C80_IRQ start=%d, blocks=%d\n", start, blocks);
543 return -1;
544 }
545 while (NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_HOST_BUF_NOT_RDY);
546
702a98c6 547#ifndef SCSI_G_NCR5380_MEM
1da177e4
LT		 548 {
549 int i;
550 for (i = 0; i < 128; i++)
551 dst[start + i] = NCR5380_read(C400_HOST_BUFFER);
552 }
553#else
702a98c6 554 /* implies SCSI_G_NCR5380_MEM */
54d8fe44
FT		 555 memcpy_fromio(dst + start,
556 hostdata->iomem + NCR53C400_host_buffer, 128);
1da177e4
LT		 557#endif
558 start += 128;
559 blocks--;
560 }
561
562 if (blocks) {
563 while (NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_HOST_BUF_NOT_RDY)
564 {
565 // FIXME - no timeout
566 }
567
702a98c6 568#ifndef SCSI_G_NCR5380_MEM
1da177e4
LT		 569 {
570 int i;
571 for (i = 0; i < 128; i++)
572 dst[start + i] = NCR5380_read(C400_HOST_BUFFER);
573 }
574#else
702a98c6 575 /* implies SCSI_G_NCR5380_MEM */
54d8fe44
FT		 576 memcpy_fromio(dst + start,
577 hostdata->iomem + NCR53C400_host_buffer, 128);
1da177e4
LT		 578#endif
579 start += 128;
580 blocks--;
581 }
582
583 if (!(NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_GATED_53C80_IRQ))
584 printk("53C400r: no 53C80 gated irq after transfer");
585
586#if 0
587 /*
588 * DON'T DO THIS - THEY NEVER ARRIVE!
589 */
590 printk("53C400r: Waiting for 53C80 registers\n");
591 while (NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_53C80_REG)
592 ;
593#endif
594 if (!(NCR5380_read(BUS_AND_STATUS_REG) & BASR_END_DMA_TRANSFER))
595 printk(KERN_ERR "53C400r: no end dma signal\n");
596
1da177e4
LT		 597 return 0;
598}
599
600/**
601 * NCR5380_write - pseudo DMA write
602 * @instance: adapter to read from
603 * @dst: buffer to read into
604 * @len: buffer length
605 *
25985edc 606 * Perform a pseudo DMA mode read from an NCR53C400 or equivalent
1da177e4
LT		 607 * controller
608 */
609
610static inline int NCR5380_pwrite(struct Scsi_Host *instance, unsigned char *src, int len)
611{
54d8fe44
FT		 612#ifdef SCSI_G_NCR5380_MEM
613 struct NCR5380_hostdata *hostdata = shost_priv(instance);
614#endif
1da177e4
LT		 615 int blocks = len / 128;
616 int start = 0;
617 int bl;
618 int i;
619
1da177e4
LT		 620 NCR5380_write(C400_CONTROL_STATUS_REG, CSR_BASE);
621 NCR5380_write(C400_BLOCK_COUNTER_REG, blocks);
622 while (1) {
623 if (NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_GATED_53C80_IRQ) {
624 printk(KERN_ERR "53C400w: Got 53C80_IRQ start=%d, blocks=%d\n", start, blocks);
625 return -1;
626 }
627
628 if ((bl = NCR5380_read(C400_BLOCK_COUNTER_REG)) == 0) {
629 break;
630 }
631 while (NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_HOST_BUF_NOT_RDY)
632 ; // FIXME - timeout
702a98c6 633#ifndef SCSI_G_NCR5380_MEM
1da177e4
LT		 634 {
635 for (i = 0; i < 128; i++)
636 NCR5380_write(C400_HOST_BUFFER, src[start + i]);
637 }
638#else
702a98c6 639 /* implies SCSI_G_NCR5380_MEM */
54d8fe44
FT		 640 memcpy_toio(hostdata->iomem + NCR53C400_host_buffer,
641 src + start, 128);
1da177e4
LT		 642#endif
643 start += 128;
644 blocks--;
645 }
646 if (blocks) {
647 while (NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_HOST_BUF_NOT_RDY)
648 ; // FIXME - no timeout
649
702a98c6 650#ifndef SCSI_G_NCR5380_MEM
1da177e4
LT		 651 {
652 for (i = 0; i < 128; i++)
653 NCR5380_write(C400_HOST_BUFFER, src[start + i]);
654 }
655#else
702a98c6 656 /* implies SCSI_G_NCR5380_MEM */
54d8fe44
FT		 657 memcpy_toio(hostdata->iomem + NCR53C400_host_buffer,
658 src + start, 128);
1da177e4
LT		 659#endif
660 start += 128;
661 blocks--;
662 }
663
664#if 0
665 printk("53C400w: waiting for registers to be available\n");
666 THEY NEVER DO ! while (NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_53C80_REG);
667 printk("53C400w: Got em\n");
668#endif
669
670 /* Let's wait for this instead - could be ugly */
671 /* All documentation says to check for this. Maybe my hardware is too
672 * fast. Waiting for it seems to work fine! KLL
673 */
674 while (!(i = NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_GATED_53C80_IRQ))
675 ; // FIXME - no timeout
676
677 /*
678 * I know. i is certainly != 0 here but the loop is new. See previous
679 * comment.
680 */
681 if (i) {
682 if (!((i = NCR5380_read(BUS_AND_STATUS_REG)) & BASR_END_DMA_TRANSFER))
683 printk(KERN_ERR "53C400w: No END OF DMA bit - WHOOPS! BASR=%0x\n", i);
684 } else
685 printk(KERN_ERR "53C400w: no 53C80 gated irq after transfer (last block)\n");
686
687#if 0
688 if (!(NCR5380_read(BUS_AND_STATUS_REG) & BASR_END_DMA_TRANSFER)) {
689 printk(KERN_ERR "53C400w: no end dma signal\n");
690 }
691#endif
692 while (!(NCR5380_read(TARGET_COMMAND_REG) & TCR_LAST_BYTE_SENT))
693 ; // TIMEOUT
694 return 0;
695}
ff3d4578
FT		 696
697static int generic_NCR5380_dma_xfer_len(struct scsi_cmnd *cmd)
698{
699 int transfersize = cmd->transfersize;
700
701 /* Limit transfers to 32K, for xx400 & xx406
702 * pseudoDMA that transfers in 128 bytes blocks.
703 */
704 if (transfersize > 32 * 1024 && cmd->SCp.this_residual &&
705 !(cmd->SCp.this_residual % transfersize))
706 transfersize = 32 * 1024;
707
708 return transfersize;
709}
710
4d8c08c7 711#endif /* PSEUDO_DMA */
1da177e4
LT		 712
713/*
714 * Include the NCR5380 core code that we build our driver around
715 */
716
717#include "NCR5380.c"
718
d0be4a7d 719static struct scsi_host_template driver_template = {
dd7ab71b 720 .show_info = generic_NCR5380_show_info,
8c32513b 721 .name = "Generic NCR5380/NCR53C400 SCSI",
1da177e4
LT		 722 .detect = generic_NCR5380_detect,
723 .release = generic_NCR5380_release_resources,
724 .info = generic_NCR5380_info,
725 .queuecommand = generic_NCR5380_queue_command,
726 .eh_abort_handler = generic_NCR5380_abort,
727 .eh_bus_reset_handler = generic_NCR5380_bus_reset,
1da177e4
LT		 728 .bios_param = NCR5380_BIOSPARAM,
729 .can_queue = CAN_QUEUE,
730 .this_id = 7,
731 .sg_tablesize = SG_ALL,
732 .cmd_per_lun = CMD_PER_LUN,
733 .use_clustering = DISABLE_CLUSTERING,
734};
735#include <linux/module.h>
736#include "scsi_module.c"
737
738module_param(ncr_irq, int, 0);
739module_param(ncr_dma, int, 0);
740module_param(ncr_addr, int, 0);
741module_param(ncr_5380, int, 0);
742module_param(ncr_53c400, int, 0);
743module_param(ncr_53c400a, int, 0);
744module_param(dtc_3181e, int, 0);
745MODULE_LICENSE("GPL");
746
b026e8ed 747#if !defined(SCSI_G_NCR5380_MEM) && defined(MODULE)
6f039790 748static struct isapnp_device_id id_table[] = {
1da177e4
LT		 749 {
750 ISAPNP_ANY_ID, ISAPNP_ANY_ID,
751 ISAPNP_VENDOR('D', 'T', 'C'), ISAPNP_FUNCTION(0x436e),
752 0},
753 {0}
754};
755
756MODULE_DEVICE_TABLE(isapnp, id_table);
702a98c6 757#endif
1da177e4
LT		 758
759__setup("ncr5380=", do_NCR5380_setup);
760__setup("ncr53c400=", do_NCR53C400_setup);
761__setup("ncr53c400a=", do_NCR53C400A_setup);
762__setup("dtc3181e=", do_DTC3181E_setup);
Linux 6.x block layer and io_uring tree(s)