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ncr5380: Fix soft lockups
[deliverable/linux.git] / drivers / scsi / g_NCR5380.c
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
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 /*
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
59 #define AUTOPROBE_IRQ
60
61 #ifdef CONFIG_SCSI_GENERIC_NCR53C400
62 #define PSEUDO_DMA
63 #endif
64
65 #include <asm/io.h>
66 #include <linux/blkdev.h>
67 #include <linux/module.h>
68 #include <scsi/scsi_host.h>
69 #include "g_NCR5380.h"
70 #include "NCR5380.h"
71 #include <linux/init.h>
72 #include <linux/ioport.h>
73 #include <linux/isapnp.h>
74 #include <linux/interrupt.h>
75
76 static int ncr_irq;
77 static int ncr_dma;
78 static int ncr_addr;
79 static int ncr_5380;
80 static int ncr_53c400;
81 static int ncr_53c400a;
82 static int dtc_3181e;
83
84 static struct override {
85 NCR5380_map_type NCR5380_map_name;
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
96 #define NO_OVERRIDES ARRAY_SIZE(overrides)
97
98 #ifndef MODULE
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
112 static void __init internal_setup(int board, char *str, int *ints)
113 {
114 static int commandline_current;
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
163 static int __init do_NCR5380_setup(char *str)
164 {
165 int ints[10];
166
167 get_options(str, ARRAY_SIZE(ints), ints);
168 internal_setup(BOARD_NCR5380, str, ints);
169 return 1;
170 }
171
172 /**
173 * do_NCR53C400_setup - set up entry point
174 * @str: unused
175 * @ints: integer parameters from kernel setup code
176 *
177 * Setup function invoked at boot to parse the ncr53c400= command
178 * line.
179 */
180
181 static int __init do_NCR53C400_setup(char *str)
182 {
183 int ints[10];
184
185 get_options(str, ARRAY_SIZE(ints), ints);
186 internal_setup(BOARD_NCR53C400, str, ints);
187 return 1;
188 }
189
190 /**
191 * do_NCR53C400A_setup - set up entry point
192 * @str: unused
193 * @ints: integer parameters from kernel setup code
194 *
195 * Setup function invoked at boot to parse the ncr53c400a= command
196 * line.
197 */
198
199 static int __init do_NCR53C400A_setup(char *str)
200 {
201 int ints[10];
202
203 get_options(str, ARRAY_SIZE(ints), ints);
204 internal_setup(BOARD_NCR53C400A, str, ints);
205 return 1;
206 }
207
208 /**
209 * do_DTC3181E_setup - set up entry point
210 * @str: unused
211 * @ints: integer parameters from kernel setup code
212 *
213 * Setup function invoked at boot to parse the dtc3181e= command
214 * line.
215 */
216
217 static int __init do_DTC3181E_setup(char *str)
218 {
219 int ints[10];
220
221 get_options(str, ARRAY_SIZE(ints), ints);
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 *
236 * Locks: none
237 */
238
239 static int __init generic_NCR5380_detect(struct scsi_host_template *tpnt)
240 {
241 static int current_override;
242 int count;
243 unsigned int *ports;
244 #ifndef SCSI_G_NCR5380_MEM
245 int i;
246 unsigned long region_size = 16;
247 #endif
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 };
254 int flags;
255 struct Scsi_Host *instance;
256 #ifdef SCSI_G_NCR5380_MEM
257 unsigned long base;
258 void __iomem *iomem;
259 #endif
260
261 if (ncr_irq)
262 overrides[0].irq = ncr_irq;
263 if (ncr_dma)
264 overrides[0].dma = ncr_dma;
265 if (ncr_addr)
266 overrides[0].NCR5380_map_name = (NCR5380_map_type) ncr_addr;
267 if (ncr_5380)
268 overrides[0].board = BOARD_NCR5380;
269 else if (ncr_53c400)
270 overrides[0].board = BOARD_NCR53C400;
271 else if (ncr_53c400a)
272 overrides[0].board = BOARD_NCR53C400A;
273 else if (dtc_3181e)
274 overrides[0].board = BOARD_DTC3181E;
275 #ifndef SCSI_G_NCR5380_MEM
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;
282 if (pnp_device_attach(dev) < 0)
283 continue;
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
297 overrides[count].irq = NO_IRQ;
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 }
307 #endif
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;
314 flags = 0;
315 switch (overrides[current_override].board) {
316 case BOARD_NCR5380:
317 flags = FLAG_NO_PSEUDO_DMA;
318 break;
319 case BOARD_NCR53C400:
320 #ifdef PSEUDO_DMA
321 flags = FLAG_NO_DMA_FIXUP;
322 #endif
323 break;
324 case BOARD_NCR53C400A:
325 flags = FLAG_NO_PSEUDO_DMA;
326 ports = ncr_53c400a_ports;
327 break;
328 case BOARD_DTC3181E:
329 flags = FLAG_NO_PSEUDO_DMA;
330 ports = dtc_3181e_ports;
331 break;
332 }
333
334 #ifndef SCSI_G_NCR5380_MEM
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
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);
391 continue;
392 }
393 #endif
394 instance = scsi_register(tpnt, sizeof(struct NCR5380_hostdata));
395 if (instance == NULL)
396 goto out_release;
397
398 #ifndef SCSI_G_NCR5380_MEM
399 instance->io_port = overrides[current_override].NCR5380_map_name;
400 instance->n_io_port = region_size;
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;
408 #else
409 instance->base = overrides[current_override].NCR5380_map_name;
410 ((struct NCR5380_hostdata *)instance->hostdata)->iomem = iomem;
411 #endif
412
413 if (NCR5380_init(instance, flags))
414 goto out_unregister;
415
416 if (overrides[current_override].board == BOARD_NCR53C400)
417 NCR5380_write(C400_CONTROL_STATUS_REG, CSR_BASE);
418
419 NCR5380_maybe_reset_bus(instance);
420
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
426 /* Compatibility with documented NCR5380 kernel parameters */
427 if (instance->irq == 255)
428 instance->irq = NO_IRQ;
429
430 if (instance->irq != NO_IRQ)
431 if (request_irq(instance->irq, generic_NCR5380_intr,
432 0, "NCR5380", instance)) {
433 printk(KERN_WARNING "scsi%d : IRQ%d not free, interrupts disabled\n", instance->host_no, instance->irq);
434 instance->irq = NO_IRQ;
435 }
436
437 if (instance->irq == NO_IRQ) {
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
442 ++current_override;
443 ++count;
444 }
445 return count;
446
447 out_unregister:
448 scsi_unregister(instance);
449 out_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;
457 }
458
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
468 static int generic_NCR5380_release_resources(struct Scsi_Host *instance)
469 {
470 if (instance->irq != NO_IRQ)
471 free_irq(instance->irq, instance);
472 NCR5380_exit(instance);
473 #ifndef SCSI_G_NCR5380_MEM
474 release_region(instance->io_port, instance->n_io_port);
475 #else
476 iounmap(((struct NCR5380_hostdata *)instance->hostdata)->iomem);
477 release_mem_region(instance->base, NCR5380_region_size);
478 #endif
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
500 static int
501 generic_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
511 #ifdef PSEUDO_DMA
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 *
519 * Perform a pseudo DMA mode read from an NCR53C400 or equivalent
520 * controller
521 */
522
523 static inline int NCR5380_pread(struct Scsi_Host *instance, unsigned char *dst, int len)
524 {
525 #ifdef SCSI_G_NCR5380_MEM
526 struct NCR5380_hostdata *hostdata = shost_priv(instance);
527 #endif
528 int blocks = len / 128;
529 int start = 0;
530 int bl;
531
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
544 #ifndef SCSI_G_NCR5380_MEM
545 {
546 int i;
547 for (i = 0; i < 128; i++)
548 dst[start + i] = NCR5380_read(C400_HOST_BUFFER);
549 }
550 #else
551 /* implies SCSI_G_NCR5380_MEM */
552 memcpy_fromio(dst + start,
553 hostdata->iomem + NCR53C400_host_buffer, 128);
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
565 #ifndef SCSI_G_NCR5380_MEM
566 {
567 int i;
568 for (i = 0; i < 128; i++)
569 dst[start + i] = NCR5380_read(C400_HOST_BUFFER);
570 }
571 #else
572 /* implies SCSI_G_NCR5380_MEM */
573 memcpy_fromio(dst + start,
574 hostdata->iomem + NCR53C400_host_buffer, 128);
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
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 *
603 * Perform a pseudo DMA mode read from an NCR53C400 or equivalent
604 * controller
605 */
606
607 static inline int NCR5380_pwrite(struct Scsi_Host *instance, unsigned char *src, int len)
608 {
609 #ifdef SCSI_G_NCR5380_MEM
610 struct NCR5380_hostdata *hostdata = shost_priv(instance);
611 #endif
612 int blocks = len / 128;
613 int start = 0;
614 int bl;
615 int i;
616
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
630 #ifndef SCSI_G_NCR5380_MEM
631 {
632 for (i = 0; i < 128; i++)
633 NCR5380_write(C400_HOST_BUFFER, src[start + i]);
634 }
635 #else
636 /* implies SCSI_G_NCR5380_MEM */
637 memcpy_toio(hostdata->iomem + NCR53C400_host_buffer,
638 src + start, 128);
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
647 #ifndef SCSI_G_NCR5380_MEM
648 {
649 for (i = 0; i < 128; i++)
650 NCR5380_write(C400_HOST_BUFFER, src[start + i]);
651 }
652 #else
653 /* implies SCSI_G_NCR5380_MEM */
654 memcpy_toio(hostdata->iomem + NCR53C400_host_buffer,
655 src + start, 128);
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 }
693
694 static 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
708 #endif /* PSEUDO_DMA */
709
710 /*
711 * Include the NCR5380 core code that we build our driver around
712 */
713
714 #include "NCR5380.c"
715
716 static struct scsi_host_template driver_template = {
717 .proc_name = DRV_MODULE_NAME,
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,
723 .eh_abort_handler = generic_NCR5380_abort,
724 .eh_bus_reset_handler = generic_NCR5380_bus_reset,
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,
731 .cmd_size = NCR5380_CMD_SIZE,
732 .max_sectors = 128,
733 };
734
735 #include "scsi_module.c"
736
737 module_param(ncr_irq, int, 0);
738 module_param(ncr_dma, int, 0);
739 module_param(ncr_addr, int, 0);
740 module_param(ncr_5380, int, 0);
741 module_param(ncr_53c400, int, 0);
742 module_param(ncr_53c400a, int, 0);
743 module_param(dtc_3181e, int, 0);
744 MODULE_LICENSE("GPL");
745
746 #if !defined(SCSI_G_NCR5380_MEM) && defined(MODULE)
747 static struct isapnp_device_id id_table[] = {
748 {
749 ISAPNP_ANY_ID, ISAPNP_ANY_ID,
750 ISAPNP_VENDOR('D', 'T', 'C'), ISAPNP_FUNCTION(0x436e),
751 0},
752 {0}
753 };
754
755 MODULE_DEVICE_TABLE(isapnp, id_table);
756 #endif
757
758 __setup("ncr5380=", do_NCR5380_setup);
759 __setup("ncr53c400=", do_NCR53C400_setup);
760 __setup("ncr53c400a=", do_NCR53C400A_setup);
761 __setup("dtc3181e=", do_DTC3181E_setup);
Linux kernel - Deliverables
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