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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 65#include <asm/io.h>
1da177e4 66#include <linux/blkdev.h>
161c0059 67#include <linux/module.h>
1da177e4
LT
68#include <scsi/scsi_host.h>
69#include "g_NCR5380.h"
70#include "NCR5380.h"
1da177e4
LT
71#include <linux/init.h>
72#include <linux/ioport.h>
73#include <linux/isapnp.h>
1da177e4
LT
74#include <linux/interrupt.h>
75
c0965e63
FT
76static int ncr_irq;
77static int ncr_dma;
78static int ncr_addr;
79static int ncr_5380;
80static int ncr_53c400;
81static int ncr_53c400a;
82static int dtc_3181e;
1da177e4
LT
83
84static struct override {
c818cb64 85 NCR5380_map_type NCR5380_map_name;
1da177e4
LT
86 int irq;
87 int dma;
88 int board; /* Use NCR53c400, Ricoh, etc. extensions ? */
89} overrides
90#ifdef GENERIC_NCR5380_OVERRIDE
91[] __initdata = GENERIC_NCR5380_OVERRIDE;
92#else
93[1] __initdata = { { 0,},};
94#endif
95
6391a113 96#define NO_OVERRIDES ARRAY_SIZE(overrides)
1da177e4 97
6391a113 98#ifndef MODULE
1da177e4
LT
99
100/**
101 * internal_setup - handle lilo command string override
102 * @board: BOARD_* identifier for the board
103 * @str: unused
104 * @ints: numeric parameters
105 *
106 * Do LILO command line initialization of the overrides array. Display
107 * errors when needed
108 *
109 * Locks: none
110 */
111
112static void __init internal_setup(int board, char *str, int *ints)
113{
d5f7e65d 114 static int commandline_current;
1da177e4
LT
115 switch (board) {
116 case BOARD_NCR5380:
117 if (ints[0] != 2 && ints[0] != 3) {
118 printk(KERN_ERR "generic_NCR5380_setup : usage ncr5380=" STRVAL(NCR5380_map_name) ",irq,dma\n");
119 return;
120 }
121 break;
122 case BOARD_NCR53C400:
123 if (ints[0] != 2) {
124 printk(KERN_ERR "generic_NCR53C400_setup : usage ncr53c400=" STRVAL(NCR5380_map_name) ",irq\n");
125 return;
126 }
127 break;
128 case BOARD_NCR53C400A:
129 if (ints[0] != 2) {
130 printk(KERN_ERR "generic_NCR53C400A_setup : usage ncr53c400a=" STRVAL(NCR5380_map_name) ",irq\n");
131 return;
132 }
133 break;
134 case BOARD_DTC3181E:
135 if (ints[0] != 2) {
136 printk("generic_DTC3181E_setup : usage dtc3181e=" STRVAL(NCR5380_map_name) ",irq\n");
137 return;
138 }
139 break;
140 }
141
142 if (commandline_current < NO_OVERRIDES) {
143 overrides[commandline_current].NCR5380_map_name = (NCR5380_map_type) ints[1];
144 overrides[commandline_current].irq = ints[2];
145 if (ints[0] == 3)
146 overrides[commandline_current].dma = ints[3];
147 else
148 overrides[commandline_current].dma = DMA_NONE;
149 overrides[commandline_current].board = board;
150 ++commandline_current;
151 }
152}
153
154
155/**
156 * do_NCR53C80_setup - set up entry point
157 * @str: unused
158 *
159 * Setup function invoked at boot to parse the ncr5380= command
160 * line.
161 */
162
163static int __init do_NCR5380_setup(char *str)
164{
165 int ints[10];
166
6391a113 167 get_options(str, ARRAY_SIZE(ints), ints);
1da177e4
LT
168 internal_setup(BOARD_NCR5380, str, ints);
169 return 1;
170}
171
172/**
173 * do_NCR53C400_setup - set up entry point
174 * @str: unused
6391a113 175 * @ints: integer parameters from kernel setup code
1da177e4
LT
176 *
177 * Setup function invoked at boot to parse the ncr53c400= command
178 * line.
179 */
180
181static int __init do_NCR53C400_setup(char *str)
182{
183 int ints[10];
184
6391a113 185 get_options(str, ARRAY_SIZE(ints), ints);
1da177e4
LT
186 internal_setup(BOARD_NCR53C400, str, ints);
187 return 1;
188}
189
190/**
191 * do_NCR53C400A_setup - set up entry point
192 * @str: unused
6391a113 193 * @ints: integer parameters from kernel setup code
1da177e4
LT
194 *
195 * Setup function invoked at boot to parse the ncr53c400a= command
196 * line.
197 */
198
199static int __init do_NCR53C400A_setup(char *str)
200{
201 int ints[10];
202
6391a113 203 get_options(str, ARRAY_SIZE(ints), ints);
1da177e4
LT
204 internal_setup(BOARD_NCR53C400A, str, ints);
205 return 1;
206}
207
208/**
209 * do_DTC3181E_setup - set up entry point
210 * @str: unused
6391a113 211 * @ints: integer parameters from kernel setup code
1da177e4
LT
212 *
213 * Setup function invoked at boot to parse the dtc3181e= command
214 * line.
215 */
216
217static int __init do_DTC3181E_setup(char *str)
218{
219 int ints[10];
220
6391a113 221 get_options(str, ARRAY_SIZE(ints), ints);
1da177e4
LT
222 internal_setup(BOARD_DTC3181E, str, ints);
223 return 1;
224}
225
226#endif
227
228/**
229 * generic_NCR5380_detect - look for NCR5380 controllers
230 * @tpnt: the scsi template
231 *
232 * Scan for the present of NCR5380, NCR53C400, NCR53C400A, DTC3181E
233 * and DTC436(ISAPnP) controllers. If overrides have been set we use
234 * them.
235 *
1da177e4
LT
236 * Locks: none
237 */
238
ed8b9e7f 239static int __init generic_NCR5380_detect(struct scsi_host_template *tpnt)
1da177e4 240{
d5f7e65d 241 static int current_override;
702a98c6 242 int count;
1da177e4 243 unsigned int *ports;
702a98c6
OZ
244#ifndef SCSI_G_NCR5380_MEM
245 int i;
1da177e4 246 unsigned long region_size = 16;
702a98c6 247#endif
1da177e4
LT
248 static unsigned int __initdata ncr_53c400a_ports[] = {
249 0x280, 0x290, 0x300, 0x310, 0x330, 0x340, 0x348, 0x350, 0
250 };
251 static unsigned int __initdata dtc_3181e_ports[] = {
252 0x220, 0x240, 0x280, 0x2a0, 0x2c0, 0x300, 0x320, 0x340, 0
253 };
4d8c08c7 254 int flags;
1da177e4 255 struct Scsi_Host *instance;
702a98c6 256#ifdef SCSI_G_NCR5380_MEM
c818cb64
AV
257 unsigned long base;
258 void __iomem *iomem;
259#endif
1da177e4 260
c0965e63 261 if (ncr_irq)
1da177e4 262 overrides[0].irq = ncr_irq;
c0965e63 263 if (ncr_dma)
1da177e4 264 overrides[0].dma = ncr_dma;
c0965e63 265 if (ncr_addr)
1da177e4 266 overrides[0].NCR5380_map_name = (NCR5380_map_type) ncr_addr;
c0965e63 267 if (ncr_5380)
1da177e4 268 overrides[0].board = BOARD_NCR5380;
c0965e63 269 else if (ncr_53c400)
1da177e4 270 overrides[0].board = BOARD_NCR53C400;
c0965e63 271 else if (ncr_53c400a)
1da177e4 272 overrides[0].board = BOARD_NCR53C400A;
c0965e63 273 else if (dtc_3181e)
1da177e4 274 overrides[0].board = BOARD_DTC3181E;
702a98c6 275#ifndef SCSI_G_NCR5380_MEM
1da177e4
LT
276 if (!current_override && isapnp_present()) {
277 struct pnp_dev *dev = NULL;
278 count = 0;
279 while ((dev = pnp_find_dev(NULL, ISAPNP_VENDOR('D', 'T', 'C'), ISAPNP_FUNCTION(0x436e), dev))) {
280 if (count >= NO_OVERRIDES)
281 break;
c94babba 282 if (pnp_device_attach(dev) < 0)
1da177e4 283 continue;
1da177e4
LT
284 if (pnp_activate_dev(dev) < 0) {
285 printk(KERN_ERR "dtc436e probe: activate failed\n");
286 pnp_device_detach(dev);
287 continue;
288 }
289 if (!pnp_port_valid(dev, 0)) {
290 printk(KERN_ERR "dtc436e probe: no valid port\n");
291 pnp_device_detach(dev);
292 continue;
293 }
294 if (pnp_irq_valid(dev, 0))
295 overrides[count].irq = pnp_irq(dev, 0);
296 else
22f5f10d 297 overrides[count].irq = NO_IRQ;
1da177e4
LT
298 if (pnp_dma_valid(dev, 0))
299 overrides[count].dma = pnp_dma(dev, 0);
300 else
301 overrides[count].dma = DMA_NONE;
302 overrides[count].NCR5380_map_name = (NCR5380_map_type) pnp_port_start(dev, 0);
303 overrides[count].board = BOARD_DTC3181E;
304 count++;
305 }
306 }
702a98c6 307#endif
1da177e4
LT
308
309 for (count = 0; current_override < NO_OVERRIDES; ++current_override) {
310 if (!(overrides[current_override].NCR5380_map_name))
311 continue;
312
313 ports = NULL;
4d8c08c7 314 flags = 0;
1da177e4
LT
315 switch (overrides[current_override].board) {
316 case BOARD_NCR5380:
317 flags = FLAG_NO_PSEUDO_DMA;
318 break;
319 case BOARD_NCR53C400:
4d8c08c7 320#ifdef PSEUDO_DMA
55181be8 321 flags = FLAG_NO_DMA_FIXUP;
4d8c08c7 322#endif
1da177e4
LT
323 break;
324 case BOARD_NCR53C400A:
325 flags = FLAG_NO_PSEUDO_DMA;
326 ports = ncr_53c400a_ports;
327 break;
328 case BOARD_DTC3181E:
be3f4121 329 flags = FLAG_NO_PSEUDO_DMA;
1da177e4
LT
330 ports = dtc_3181e_ports;
331 break;
332 }
333
702a98c6 334#ifndef SCSI_G_NCR5380_MEM
1da177e4
LT
335 if (ports) {
336 /* wakeup sequence for the NCR53C400A and DTC3181E */
337
338 /* Disable the adapter and look for a free io port */
339 outb(0x59, 0x779);
340 outb(0xb9, 0x379);
341 outb(0xc5, 0x379);
342 outb(0xae, 0x379);
343 outb(0xa6, 0x379);
344 outb(0x00, 0x379);
345
346 if (overrides[current_override].NCR5380_map_name != PORT_AUTO)
347 for (i = 0; ports[i]; i++) {
348 if (!request_region(ports[i], 16, "ncr53c80"))
349 continue;
350 if (overrides[current_override].NCR5380_map_name == ports[i])
351 break;
352 release_region(ports[i], 16);
353 } else
354 for (i = 0; ports[i]; i++) {
355 if (!request_region(ports[i], 16, "ncr53c80"))
356 continue;
357 if (inb(ports[i]) == 0xff)
358 break;
359 release_region(ports[i], 16);
360 }
361 if (ports[i]) {
362 /* At this point we have our region reserved */
363 outb(0x59, 0x779);
364 outb(0xb9, 0x379);
365 outb(0xc5, 0x379);
366 outb(0xae, 0x379);
367 outb(0xa6, 0x379);
368 outb(0x80 | i, 0x379); /* set io port to be used */
369 outb(0xc0, ports[i] + 9);
370 if (inb(ports[i] + 9) != 0x80)
371 continue;
372 else
373 overrides[current_override].NCR5380_map_name = ports[i];
374 } else
375 continue;
376 }
377 else
378 {
379 /* Not a 53C400A style setup - just grab */
380 if(!(request_region(overrides[current_override].NCR5380_map_name, NCR5380_region_size, "ncr5380")))
381 continue;
382 region_size = NCR5380_region_size;
383 }
384#else
c818cb64
AV
385 base = overrides[current_override].NCR5380_map_name;
386 if (!request_mem_region(base, NCR5380_region_size, "ncr5380"))
387 continue;
388 iomem = ioremap(base, NCR5380_region_size);
389 if (!iomem) {
390 release_mem_region(base, NCR5380_region_size);
1da177e4 391 continue;
c818cb64 392 }
1da177e4
LT
393#endif
394 instance = scsi_register(tpnt, sizeof(struct NCR5380_hostdata));
0ad0eff9
FT
395 if (instance == NULL)
396 goto out_release;
1da177e4 397
702a98c6 398#ifndef SCSI_G_NCR5380_MEM
b01ec348 399 instance->io_port = overrides[current_override].NCR5380_map_name;
1da177e4 400 instance->n_io_port = region_size;
4d8c08c7
FT
401
402 /*
403 * On NCR53C400 boards, NCR5380 registers are mapped 8 past
404 * the base address.
405 */
406 if (overrides[current_override].board == BOARD_NCR53C400)
407 instance->io_port += 8;
c818cb64 408#else
b01ec348 409 instance->base = overrides[current_override].NCR5380_map_name;
702a98c6 410 ((struct NCR5380_hostdata *)instance->hostdata)->iomem = iomem;
1da177e4
LT
411#endif
412
0ad0eff9
FT
413 if (NCR5380_init(instance, flags))
414 goto out_unregister;
1da177e4 415
4d8c08c7
FT
416 if (overrides[current_override].board == BOARD_NCR53C400)
417 NCR5380_write(C400_CONTROL_STATUS_REG, CSR_BASE);
418
b6488f97
FT
419 NCR5380_maybe_reset_bus(instance);
420
1da177e4
LT
421 if (overrides[current_override].irq != IRQ_AUTO)
422 instance->irq = overrides[current_override].irq;
423 else
424 instance->irq = NCR5380_probe_irq(instance, 0xffff);
425
22f5f10d
FT
426 /* Compatibility with documented NCR5380 kernel parameters */
427 if (instance->irq == 255)
428 instance->irq = NO_IRQ;
429
430 if (instance->irq != NO_IRQ)
1e641664 431 if (request_irq(instance->irq, generic_NCR5380_intr,
4909cc2b 432 0, "NCR5380", instance)) {
1da177e4 433 printk(KERN_WARNING "scsi%d : IRQ%d not free, interrupts disabled\n", instance->host_no, instance->irq);
22f5f10d 434 instance->irq = NO_IRQ;
1da177e4
LT
435 }
436
22f5f10d 437 if (instance->irq == NO_IRQ) {
1da177e4
LT
438 printk(KERN_INFO "scsi%d : interrupts not enabled. for better interactive performance,\n", instance->host_no);
439 printk(KERN_INFO "scsi%d : please jumper the board for a free IRQ.\n", instance->host_no);
440 }
441
1da177e4
LT
442 ++current_override;
443 ++count;
444 }
445 return count;
0ad0eff9
FT
446
447out_unregister:
448 scsi_unregister(instance);
449out_release:
450#ifndef SCSI_G_NCR5380_MEM
451 release_region(overrides[current_override].NCR5380_map_name, region_size);
452#else
453 iounmap(iomem);
454 release_mem_region(base, NCR5380_region_size);
455#endif
456 return count;
1da177e4
LT
457}
458
1da177e4
LT
459/**
460 * generic_NCR5380_release_resources - free resources
461 * @instance: host adapter to clean up
462 *
463 * Free the generic interface resources from this adapter.
464 *
465 * Locks: none
466 */
467
ed8b9e7f 468static int generic_NCR5380_release_resources(struct Scsi_Host *instance)
1da177e4 469{
22f5f10d 470 if (instance->irq != NO_IRQ)
1e641664 471 free_irq(instance->irq, instance);
1da177e4 472 NCR5380_exit(instance);
702a98c6 473#ifndef SCSI_G_NCR5380_MEM
b01ec348 474 release_region(instance->io_port, instance->n_io_port);
1da177e4 475#else
702a98c6 476 iounmap(((struct NCR5380_hostdata *)instance->hostdata)->iomem);
b01ec348 477 release_mem_region(instance->base, NCR5380_region_size);
1da177e4 478#endif
1da177e4
LT
479 return 0;
480}
481
482#ifdef BIOSPARAM
483/**
484 * generic_NCR5380_biosparam
485 * @disk: disk to compute geometry for
486 * @dev: device identifier for this disk
487 * @ip: sizes to fill in
488 *
489 * Generates a BIOS / DOS compatible H-C-S mapping for the specified
490 * device / size.
491 *
492 * XXX Most SCSI boards use this mapping, I could be incorrect. Someone
493 * using hard disks on a trantor should verify that this mapping
494 * corresponds to that used by the BIOS / ASPI driver by running the linux
495 * fdisk program and matching the H_C_S coordinates to what DOS uses.
496 *
497 * Locks: none
498 */
499
500static int
501generic_NCR5380_biosparam(struct scsi_device *sdev, struct block_device *bdev,
502 sector_t capacity, int *ip)
503{
504 ip[0] = 64;
505 ip[1] = 32;
506 ip[2] = capacity >> 11;
507 return 0;
508}
509#endif
510
4d8c08c7 511#ifdef PSEUDO_DMA
1da177e4
LT
512
513/**
514 * NCR5380_pread - pseudo DMA read
515 * @instance: adapter to read from
516 * @dst: buffer to read into
517 * @len: buffer length
518 *
25985edc 519 * Perform a pseudo DMA mode read from an NCR53C400 or equivalent
1da177e4
LT
520 * controller
521 */
522
523static inline int NCR5380_pread(struct Scsi_Host *instance, unsigned char *dst, int len)
524{
54d8fe44
FT
525#ifdef SCSI_G_NCR5380_MEM
526 struct NCR5380_hostdata *hostdata = shost_priv(instance);
527#endif
1da177e4
LT
528 int blocks = len / 128;
529 int start = 0;
530 int bl;
531
1da177e4
LT
532 NCR5380_write(C400_CONTROL_STATUS_REG, CSR_BASE | CSR_TRANS_DIR);
533 NCR5380_write(C400_BLOCK_COUNTER_REG, blocks);
534 while (1) {
535 if ((bl = NCR5380_read(C400_BLOCK_COUNTER_REG)) == 0) {
536 break;
537 }
538 if (NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_GATED_53C80_IRQ) {
539 printk(KERN_ERR "53C400r: Got 53C80_IRQ start=%d, blocks=%d\n", start, blocks);
540 return -1;
541 }
542 while (NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_HOST_BUF_NOT_RDY);
543
702a98c6 544#ifndef SCSI_G_NCR5380_MEM
1da177e4
LT
545 {
546 int i;
547 for (i = 0; i < 128; i++)
548 dst[start + i] = NCR5380_read(C400_HOST_BUFFER);
549 }
550#else
702a98c6 551 /* implies SCSI_G_NCR5380_MEM */
54d8fe44
FT
552 memcpy_fromio(dst + start,
553 hostdata->iomem + NCR53C400_host_buffer, 128);
1da177e4
LT
554#endif
555 start += 128;
556 blocks--;
557 }
558
559 if (blocks) {
560 while (NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_HOST_BUF_NOT_RDY)
561 {
562 // FIXME - no timeout
563 }
564
702a98c6 565#ifndef SCSI_G_NCR5380_MEM
1da177e4
LT
566 {
567 int i;
568 for (i = 0; i < 128; i++)
569 dst[start + i] = NCR5380_read(C400_HOST_BUFFER);
570 }
571#else
702a98c6 572 /* implies SCSI_G_NCR5380_MEM */
54d8fe44
FT
573 memcpy_fromio(dst + start,
574 hostdata->iomem + NCR53C400_host_buffer, 128);
1da177e4
LT
575#endif
576 start += 128;
577 blocks--;
578 }
579
580 if (!(NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_GATED_53C80_IRQ))
581 printk("53C400r: no 53C80 gated irq after transfer");
582
583#if 0
584 /*
585 * DON'T DO THIS - THEY NEVER ARRIVE!
586 */
587 printk("53C400r: Waiting for 53C80 registers\n");
588 while (NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_53C80_REG)
589 ;
590#endif
591 if (!(NCR5380_read(BUS_AND_STATUS_REG) & BASR_END_DMA_TRANSFER))
592 printk(KERN_ERR "53C400r: no end dma signal\n");
593
1da177e4
LT
594 return 0;
595}
596
597/**
598 * NCR5380_write - pseudo DMA write
599 * @instance: adapter to read from
600 * @dst: buffer to read into
601 * @len: buffer length
602 *
25985edc 603 * Perform a pseudo DMA mode read from an NCR53C400 or equivalent
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LT
604 * controller
605 */
606
607static inline int NCR5380_pwrite(struct Scsi_Host *instance, unsigned char *src, int len)
608{
54d8fe44
FT
609#ifdef SCSI_G_NCR5380_MEM
610 struct NCR5380_hostdata *hostdata = shost_priv(instance);
611#endif
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LT
612 int blocks = len / 128;
613 int start = 0;
614 int bl;
615 int i;
616
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LT
617 NCR5380_write(C400_CONTROL_STATUS_REG, CSR_BASE);
618 NCR5380_write(C400_BLOCK_COUNTER_REG, blocks);
619 while (1) {
620 if (NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_GATED_53C80_IRQ) {
621 printk(KERN_ERR "53C400w: Got 53C80_IRQ start=%d, blocks=%d\n", start, blocks);
622 return -1;
623 }
624
625 if ((bl = NCR5380_read(C400_BLOCK_COUNTER_REG)) == 0) {
626 break;
627 }
628 while (NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_HOST_BUF_NOT_RDY)
629 ; // FIXME - timeout
702a98c6 630#ifndef SCSI_G_NCR5380_MEM
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LT
631 {
632 for (i = 0; i < 128; i++)
633 NCR5380_write(C400_HOST_BUFFER, src[start + i]);
634 }
635#else
702a98c6 636 /* implies SCSI_G_NCR5380_MEM */
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FT
637 memcpy_toio(hostdata->iomem + NCR53C400_host_buffer,
638 src + start, 128);
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LT
639#endif
640 start += 128;
641 blocks--;
642 }
643 if (blocks) {
644 while (NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_HOST_BUF_NOT_RDY)
645 ; // FIXME - no timeout
646
702a98c6 647#ifndef SCSI_G_NCR5380_MEM
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LT
648 {
649 for (i = 0; i < 128; i++)
650 NCR5380_write(C400_HOST_BUFFER, src[start + i]);
651 }
652#else
702a98c6 653 /* implies SCSI_G_NCR5380_MEM */
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FT
654 memcpy_toio(hostdata->iomem + NCR53C400_host_buffer,
655 src + start, 128);
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LT
656#endif
657 start += 128;
658 blocks--;
659 }
660
661#if 0
662 printk("53C400w: waiting for registers to be available\n");
663 THEY NEVER DO ! while (NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_53C80_REG);
664 printk("53C400w: Got em\n");
665#endif
666
667 /* Let's wait for this instead - could be ugly */
668 /* All documentation says to check for this. Maybe my hardware is too
669 * fast. Waiting for it seems to work fine! KLL
670 */
671 while (!(i = NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_GATED_53C80_IRQ))
672 ; // FIXME - no timeout
673
674 /*
675 * I know. i is certainly != 0 here but the loop is new. See previous
676 * comment.
677 */
678 if (i) {
679 if (!((i = NCR5380_read(BUS_AND_STATUS_REG)) & BASR_END_DMA_TRANSFER))
680 printk(KERN_ERR "53C400w: No END OF DMA bit - WHOOPS! BASR=%0x\n", i);
681 } else
682 printk(KERN_ERR "53C400w: no 53C80 gated irq after transfer (last block)\n");
683
684#if 0
685 if (!(NCR5380_read(BUS_AND_STATUS_REG) & BASR_END_DMA_TRANSFER)) {
686 printk(KERN_ERR "53C400w: no end dma signal\n");
687 }
688#endif
689 while (!(NCR5380_read(TARGET_COMMAND_REG) & TCR_LAST_BYTE_SENT))
690 ; // TIMEOUT
691 return 0;
692}
ff3d4578
FT
693
694static int generic_NCR5380_dma_xfer_len(struct scsi_cmnd *cmd)
695{
696 int transfersize = cmd->transfersize;
697
698 /* Limit transfers to 32K, for xx400 & xx406
699 * pseudoDMA that transfers in 128 bytes blocks.
700 */
701 if (transfersize > 32 * 1024 && cmd->SCp.this_residual &&
702 !(cmd->SCp.this_residual % transfersize))
703 transfersize = 32 * 1024;
704
705 return transfersize;
706}
707
4d8c08c7 708#endif /* PSEUDO_DMA */
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709
710/*
711 * Include the NCR5380 core code that we build our driver around
712 */
713
714#include "NCR5380.c"
715
d0be4a7d 716static struct scsi_host_template driver_template = {
aa2e2cb1 717 .proc_name = DRV_MODULE_NAME,
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FT
718 .name = "Generic NCR5380/NCR53C400 SCSI",
719 .detect = generic_NCR5380_detect,
720 .release = generic_NCR5380_release_resources,
721 .info = generic_NCR5380_info,
722 .queuecommand = generic_NCR5380_queue_command,
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723 .eh_abort_handler = generic_NCR5380_abort,
724 .eh_bus_reset_handler = generic_NCR5380_bus_reset,
aa2e2cb1
FT
725 .bios_param = NCR5380_BIOSPARAM,
726 .can_queue = 16,
727 .this_id = 7,
728 .sg_tablesize = SG_ALL,
729 .cmd_per_lun = 2,
730 .use_clustering = DISABLE_CLUSTERING,
1da177e4 731};
161c0059 732
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LT
733#include "scsi_module.c"
734
735module_param(ncr_irq, int, 0);
736module_param(ncr_dma, int, 0);
737module_param(ncr_addr, int, 0);
738module_param(ncr_5380, int, 0);
739module_param(ncr_53c400, int, 0);
740module_param(ncr_53c400a, int, 0);
741module_param(dtc_3181e, int, 0);
742MODULE_LICENSE("GPL");
743
b026e8ed 744#if !defined(SCSI_G_NCR5380_MEM) && defined(MODULE)
6f039790 745static struct isapnp_device_id id_table[] = {
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LT
746 {
747 ISAPNP_ANY_ID, ISAPNP_ANY_ID,
748 ISAPNP_VENDOR('D', 'T', 'C'), ISAPNP_FUNCTION(0x436e),
749 0},
750 {0}
751};
752
753MODULE_DEVICE_TABLE(isapnp, id_table);
702a98c6 754#endif
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LT
755
756__setup("ncr5380=", do_NCR5380_setup);
757__setup("ncr53c400=", do_NCR53C400_setup);
758__setup("ncr53c400a=", do_NCR53C400A_setup);
759__setup("dtc3181e=", do_DTC3181E_setup);