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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
81/*
82 * $Log: generic_NCR5380.c,v $
83 */
84
85/* settings for DTC3181E card with only Mustek scanner attached */
86#define USLEEP
87#define USLEEP_POLL 1
88#define USLEEP_SLEEP 20
89#define USLEEP_WAITLONG 500
90
91#define AUTOPROBE_IRQ
92#define AUTOSENSE
93
94
95#ifdef CONFIG_SCSI_GENERIC_NCR53C400
96#define NCR53C400_PSEUDO_DMA 1
97#define PSEUDO_DMA
98#define NCR53C400
99#define NCR5380_STATS
100#undef NCR5380_STAT_LIMIT
101#endif
102
103#include <asm/system.h>
104#include <asm/io.h>
105#include <linux/signal.h>
106#include <linux/blkdev.h>
107#include "scsi.h"
108#include <scsi/scsi_host.h>
109#include "g_NCR5380.h"
110#include "NCR5380.h"
111#include <linux/stat.h>
112#include <linux/init.h>
113#include <linux/ioport.h>
114#include <linux/isapnp.h>
115#include <linux/delay.h>
116#include <linux/interrupt.h>
117
118#define NCR_NOT_SET 0
119static int ncr_irq = NCR_NOT_SET;
120static int ncr_dma = NCR_NOT_SET;
121static int ncr_addr = NCR_NOT_SET;
122static int ncr_5380 = NCR_NOT_SET;
123static int ncr_53c400 = NCR_NOT_SET;
124static int ncr_53c400a = NCR_NOT_SET;
125static int dtc_3181e = NCR_NOT_SET;
126
127static struct override {
128 NCR5380_map_type NCR5380_map_name;
129 int irq;
130 int dma;
131 int board; /* Use NCR53c400, Ricoh, etc. extensions ? */
132} overrides
133#ifdef GENERIC_NCR5380_OVERRIDE
134[] __initdata = GENERIC_NCR5380_OVERRIDE;
135#else
136[1] __initdata = { { 0,},};
137#endif
138
139#define NO_OVERRIDES ARRAY_SIZE(overrides)
140
141#ifndef MODULE
142
143/**
144 * internal_setup - handle lilo command string override
145 * @board: BOARD_* identifier for the board
146 * @str: unused
147 * @ints: numeric parameters
148 *
149 * Do LILO command line initialization of the overrides array. Display
150 * errors when needed
151 *
152 * Locks: none
153 */
154
155static void __init internal_setup(int board, char *str, int *ints)
156{
157 static int commandline_current = 0;
158 switch (board) {
159 case BOARD_NCR5380:
160 if (ints[0] != 2 && ints[0] != 3) {
161 printk(KERN_ERR "generic_NCR5380_setup : usage ncr5380=" STRVAL(NCR5380_map_name) ",irq,dma\n");
162 return;
163 }
164 break;
165 case BOARD_NCR53C400:
166 if (ints[0] != 2) {
167 printk(KERN_ERR "generic_NCR53C400_setup : usage ncr53c400=" STRVAL(NCR5380_map_name) ",irq\n");
168 return;
169 }
170 break;
171 case BOARD_NCR53C400A:
172 if (ints[0] != 2) {
173 printk(KERN_ERR "generic_NCR53C400A_setup : usage ncr53c400a=" STRVAL(NCR5380_map_name) ",irq\n");
174 return;
175 }
176 break;
177 case BOARD_DTC3181E:
178 if (ints[0] != 2) {
179 printk("generic_DTC3181E_setup : usage dtc3181e=" STRVAL(NCR5380_map_name) ",irq\n");
180 return;
181 }
182 break;
183 }
184
185 if (commandline_current < NO_OVERRIDES) {
186 overrides[commandline_current].NCR5380_map_name = (NCR5380_map_type) ints[1];
187 overrides[commandline_current].irq = ints[2];
188 if (ints[0] == 3)
189 overrides[commandline_current].dma = ints[3];
190 else
191 overrides[commandline_current].dma = DMA_NONE;
192 overrides[commandline_current].board = board;
193 ++commandline_current;
194 }
195}
196
197
198/**
199 * do_NCR53C80_setup - set up entry point
200 * @str: unused
201 *
202 * Setup function invoked at boot to parse the ncr5380= command
203 * line.
204 */
205
206static int __init do_NCR5380_setup(char *str)
207{
208 int ints[10];
209
210 get_options(str, ARRAY_SIZE(ints), ints);
211 internal_setup(BOARD_NCR5380, str, ints);
212 return 1;
213}
214
215/**
216 * do_NCR53C400_setup - set up entry point
217 * @str: unused
218 * @ints: integer parameters from kernel setup code
219 *
220 * Setup function invoked at boot to parse the ncr53c400= command
221 * line.
222 */
223
224static int __init do_NCR53C400_setup(char *str)
225{
226 int ints[10];
227
228 get_options(str, ARRAY_SIZE(ints), ints);
229 internal_setup(BOARD_NCR53C400, str, ints);
230 return 1;
231}
232
233/**
234 * do_NCR53C400A_setup - set up entry point
235 * @str: unused
236 * @ints: integer parameters from kernel setup code
237 *
238 * Setup function invoked at boot to parse the ncr53c400a= command
239 * line.
240 */
241
242static int __init do_NCR53C400A_setup(char *str)
243{
244 int ints[10];
245
246 get_options(str, ARRAY_SIZE(ints), ints);
247 internal_setup(BOARD_NCR53C400A, str, ints);
248 return 1;
249}
250
251/**
252 * do_DTC3181E_setup - set up entry point
253 * @str: unused
254 * @ints: integer parameters from kernel setup code
255 *
256 * Setup function invoked at boot to parse the dtc3181e= command
257 * line.
258 */
259
260static int __init do_DTC3181E_setup(char *str)
261{
262 int ints[10];
263
264 get_options(str, ARRAY_SIZE(ints), ints);
265 internal_setup(BOARD_DTC3181E, str, ints);
266 return 1;
267}
268
269#endif
270
271/**
272 * generic_NCR5380_detect - look for NCR5380 controllers
273 * @tpnt: the scsi template
274 *
275 * Scan for the present of NCR5380, NCR53C400, NCR53C400A, DTC3181E
276 * and DTC436(ISAPnP) controllers. If overrides have been set we use
277 * them.
278 *
279 * The caller supplied NCR5380_init function is invoked from here, before
280 * the interrupt line is taken.
281 *
282 * Locks: none
283 */
284
285int __init generic_NCR5380_detect(struct scsi_host_template * tpnt)
286{
287 static int current_override = 0;
288 int count;
289 unsigned int *ports;
290#ifndef SCSI_G_NCR5380_MEM
291 int i;
292 unsigned long region_size = 16;
293#endif
294 static unsigned int __initdata ncr_53c400a_ports[] = {
295 0x280, 0x290, 0x300, 0x310, 0x330, 0x340, 0x348, 0x350, 0
296 };
297 static unsigned int __initdata dtc_3181e_ports[] = {
298 0x220, 0x240, 0x280, 0x2a0, 0x2c0, 0x300, 0x320, 0x340, 0
299 };
300 int flags = 0;
301 struct Scsi_Host *instance;
302#ifdef SCSI_G_NCR5380_MEM
303 unsigned long base;
304 void __iomem *iomem;
305#endif
306
307 if (ncr_irq != NCR_NOT_SET)
308 overrides[0].irq = ncr_irq;
309 if (ncr_dma != NCR_NOT_SET)
310 overrides[0].dma = ncr_dma;
311 if (ncr_addr != NCR_NOT_SET)
312 overrides[0].NCR5380_map_name = (NCR5380_map_type) ncr_addr;
313 if (ncr_5380 != NCR_NOT_SET)
314 overrides[0].board = BOARD_NCR5380;
315 else if (ncr_53c400 != NCR_NOT_SET)
316 overrides[0].board = BOARD_NCR53C400;
317 else if (ncr_53c400a != NCR_NOT_SET)
318 overrides[0].board = BOARD_NCR53C400A;
319 else if (dtc_3181e != NCR_NOT_SET)
320 overrides[0].board = BOARD_DTC3181E;
321#ifndef SCSI_G_NCR5380_MEM
322 if (!current_override && isapnp_present()) {
323 struct pnp_dev *dev = NULL;
324 count = 0;
325 while ((dev = pnp_find_dev(NULL, ISAPNP_VENDOR('D', 'T', 'C'), ISAPNP_FUNCTION(0x436e), dev))) {
326 if (count >= NO_OVERRIDES)
327 break;
328 if (pnp_device_attach(dev) < 0)
329 continue;
330 if (pnp_activate_dev(dev) < 0) {
331 printk(KERN_ERR "dtc436e probe: activate failed\n");
332 pnp_device_detach(dev);
333 continue;
334 }
335 if (!pnp_port_valid(dev, 0)) {
336 printk(KERN_ERR "dtc436e probe: no valid port\n");
337 pnp_device_detach(dev);
338 continue;
339 }
340 if (pnp_irq_valid(dev, 0))
341 overrides[count].irq = pnp_irq(dev, 0);
342 else
343 overrides[count].irq = SCSI_IRQ_NONE;
344 if (pnp_dma_valid(dev, 0))
345 overrides[count].dma = pnp_dma(dev, 0);
346 else
347 overrides[count].dma = DMA_NONE;
348 overrides[count].NCR5380_map_name = (NCR5380_map_type) pnp_port_start(dev, 0);
349 overrides[count].board = BOARD_DTC3181E;
350 count++;
351 }
352 }
353#endif
354 tpnt->proc_name = "g_NCR5380";
355
356 for (count = 0; current_override < NO_OVERRIDES; ++current_override) {
357 if (!(overrides[current_override].NCR5380_map_name))
358 continue;
359
360 ports = NULL;
361 switch (overrides[current_override].board) {
362 case BOARD_NCR5380:
363 flags = FLAG_NO_PSEUDO_DMA;
364 break;
365 case BOARD_NCR53C400:
366 flags = FLAG_NCR53C400;
367 break;
368 case BOARD_NCR53C400A:
369 flags = FLAG_NO_PSEUDO_DMA;
370 ports = ncr_53c400a_ports;
371 break;
372 case BOARD_DTC3181E:
373 flags = FLAG_NO_PSEUDO_DMA | FLAG_DTC3181E;
374 ports = dtc_3181e_ports;
375 break;
376 }
377
378#ifndef SCSI_G_NCR5380_MEM
379 if (ports) {
380 /* wakeup sequence for the NCR53C400A and DTC3181E */
381
382 /* Disable the adapter and look for a free io port */
383 outb(0x59, 0x779);
384 outb(0xb9, 0x379);
385 outb(0xc5, 0x379);
386 outb(0xae, 0x379);
387 outb(0xa6, 0x379);
388 outb(0x00, 0x379);
389
390 if (overrides[current_override].NCR5380_map_name != PORT_AUTO)
391 for (i = 0; ports[i]; i++) {
392 if (!request_region(ports[i], 16, "ncr53c80"))
393 continue;
394 if (overrides[current_override].NCR5380_map_name == ports[i])
395 break;
396 release_region(ports[i], 16);
397 } else
398 for (i = 0; ports[i]; i++) {
399 if (!request_region(ports[i], 16, "ncr53c80"))
400 continue;
401 if (inb(ports[i]) == 0xff)
402 break;
403 release_region(ports[i], 16);
404 }
405 if (ports[i]) {
406 /* At this point we have our region reserved */
407 outb(0x59, 0x779);
408 outb(0xb9, 0x379);
409 outb(0xc5, 0x379);
410 outb(0xae, 0x379);
411 outb(0xa6, 0x379);
412 outb(0x80 | i, 0x379); /* set io port to be used */
413 outb(0xc0, ports[i] + 9);
414 if (inb(ports[i] + 9) != 0x80)
415 continue;
416 else
417 overrides[current_override].NCR5380_map_name = ports[i];
418 } else
419 continue;
420 }
421 else
422 {
423 /* Not a 53C400A style setup - just grab */
424 if(!(request_region(overrides[current_override].NCR5380_map_name, NCR5380_region_size, "ncr5380")))
425 continue;
426 region_size = NCR5380_region_size;
427 }
428#else
429 base = overrides[current_override].NCR5380_map_name;
430 if (!request_mem_region(base, NCR5380_region_size, "ncr5380"))
431 continue;
432 iomem = ioremap(base, NCR5380_region_size);
433 if (!iomem) {
434 release_mem_region(base, NCR5380_region_size);
435 continue;
436 }
437#endif
438 instance = scsi_register(tpnt, sizeof(struct NCR5380_hostdata));
439 if (instance == NULL) {
440#ifndef SCSI_G_NCR5380_MEM
441 release_region(overrides[current_override].NCR5380_map_name, region_size);
442#else
443 iounmap(iomem);
444 release_mem_region(base, NCR5380_region_size);
445#endif
446 continue;
447 }
448
449 instance->NCR5380_instance_name = overrides[current_override].NCR5380_map_name;
450#ifndef SCSI_G_NCR5380_MEM
451 instance->n_io_port = region_size;
452#else
453 ((struct NCR5380_hostdata *)instance->hostdata)->iomem = iomem;
454#endif
455
456 NCR5380_init(instance, flags);
457
458 if (overrides[current_override].irq != IRQ_AUTO)
459 instance->irq = overrides[current_override].irq;
460 else
461 instance->irq = NCR5380_probe_irq(instance, 0xffff);
462
463 if (instance->irq != SCSI_IRQ_NONE)
464 if (request_irq(instance->irq, generic_NCR5380_intr,
465 IRQF_DISABLED, "NCR5380", instance)) {
466 printk(KERN_WARNING "scsi%d : IRQ%d not free, interrupts disabled\n", instance->host_no, instance->irq);
467 instance->irq = SCSI_IRQ_NONE;
468 }
469
470 if (instance->irq == SCSI_IRQ_NONE) {
471 printk(KERN_INFO "scsi%d : interrupts not enabled. for better interactive performance,\n", instance->host_no);
472 printk(KERN_INFO "scsi%d : please jumper the board for a free IRQ.\n", instance->host_no);
473 }
474
475 printk(KERN_INFO "scsi%d : at " STRVAL(NCR5380_map_name) " 0x%x", instance->host_no, (unsigned int) instance->NCR5380_instance_name);
476 if (instance->irq == SCSI_IRQ_NONE)
477 printk(" interrupts disabled");
478 else
479 printk(" irq %d", instance->irq);
480 printk(" options CAN_QUEUE=%d CMD_PER_LUN=%d release=%d", CAN_QUEUE, CMD_PER_LUN, GENERIC_NCR5380_PUBLIC_RELEASE);
481 NCR5380_print_options(instance);
482 printk("\n");
483
484 ++current_override;
485 ++count;
486 }
487 return count;
488}
489
490/**
491 * generic_NCR5380_info - reporting string
492 * @host: NCR5380 to report on
493 *
494 * Report driver information for the NCR5380
495 */
496
497const char *generic_NCR5380_info(struct Scsi_Host *host)
498{
499 static const char string[] = "Generic NCR5380/53C400 Driver";
500 return string;
501}
502
503/**
504 * generic_NCR5380_release_resources - free resources
505 * @instance: host adapter to clean up
506 *
507 * Free the generic interface resources from this adapter.
508 *
509 * Locks: none
510 */
511
512int generic_NCR5380_release_resources(struct Scsi_Host *instance)
513{
514 NCR5380_local_declare();
515 NCR5380_setup(instance);
516
517 if (instance->irq != SCSI_IRQ_NONE)
518 free_irq(instance->irq, instance);
519 NCR5380_exit(instance);
520
521#ifndef SCSI_G_NCR5380_MEM
522 release_region(instance->NCR5380_instance_name, instance->n_io_port);
523#else
524 iounmap(((struct NCR5380_hostdata *)instance->hostdata)->iomem);
525 release_mem_region(instance->NCR5380_instance_name, NCR5380_region_size);
526#endif
527
528
529 return 0;
530}
531
532#ifdef BIOSPARAM
533/**
534 * generic_NCR5380_biosparam
535 * @disk: disk to compute geometry for
536 * @dev: device identifier for this disk
537 * @ip: sizes to fill in
538 *
539 * Generates a BIOS / DOS compatible H-C-S mapping for the specified
540 * device / size.
541 *
542 * XXX Most SCSI boards use this mapping, I could be incorrect. Someone
543 * using hard disks on a trantor should verify that this mapping
544 * corresponds to that used by the BIOS / ASPI driver by running the linux
545 * fdisk program and matching the H_C_S coordinates to what DOS uses.
546 *
547 * Locks: none
548 */
549
550static int
551generic_NCR5380_biosparam(struct scsi_device *sdev, struct block_device *bdev,
552 sector_t capacity, int *ip)
553{
554 ip[0] = 64;
555 ip[1] = 32;
556 ip[2] = capacity >> 11;
557 return 0;
558}
559#endif
560
561#ifdef NCR53C400_PSEUDO_DMA
562
563/**
564 * NCR5380_pread - pseudo DMA read
565 * @instance: adapter to read from
566 * @dst: buffer to read into
567 * @len: buffer length
568 *
569 * Perform a pseudo DMA mode read from an NCR53C400 or equivalent
570 * controller
571 */
572
573static inline int NCR5380_pread(struct Scsi_Host *instance, unsigned char *dst, int len)
574{
575 int blocks = len / 128;
576 int start = 0;
577 int bl;
578
579 NCR5380_local_declare();
580 NCR5380_setup(instance);
581
582 NCR5380_write(C400_CONTROL_STATUS_REG, CSR_BASE | CSR_TRANS_DIR);
583 NCR5380_write(C400_BLOCK_COUNTER_REG, blocks);
584 while (1) {
585 if ((bl = NCR5380_read(C400_BLOCK_COUNTER_REG)) == 0) {
586 break;
587 }
588 if (NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_GATED_53C80_IRQ) {
589 printk(KERN_ERR "53C400r: Got 53C80_IRQ start=%d, blocks=%d\n", start, blocks);
590 return -1;
591 }
592 while (NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_HOST_BUF_NOT_RDY);
593
594#ifndef SCSI_G_NCR5380_MEM
595 {
596 int i;
597 for (i = 0; i < 128; i++)
598 dst[start + i] = NCR5380_read(C400_HOST_BUFFER);
599 }
600#else
601 /* implies SCSI_G_NCR5380_MEM */
602 memcpy_fromio(dst + start, iomem + NCR53C400_host_buffer, 128);
603#endif
604 start += 128;
605 blocks--;
606 }
607
608 if (blocks) {
609 while (NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_HOST_BUF_NOT_RDY)
610 {
611 // FIXME - no timeout
612 }
613
614#ifndef SCSI_G_NCR5380_MEM
615 {
616 int i;
617 for (i = 0; i < 128; i++)
618 dst[start + i] = NCR5380_read(C400_HOST_BUFFER);
619 }
620#else
621 /* implies SCSI_G_NCR5380_MEM */
622 memcpy_fromio(dst + start, iomem + NCR53C400_host_buffer, 128);
623#endif
624 start += 128;
625 blocks--;
626 }
627
628 if (!(NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_GATED_53C80_IRQ))
629 printk("53C400r: no 53C80 gated irq after transfer");
630
631#if 0
632 /*
633 * DON'T DO THIS - THEY NEVER ARRIVE!
634 */
635 printk("53C400r: Waiting for 53C80 registers\n");
636 while (NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_53C80_REG)
637 ;
638#endif
639 if (!(NCR5380_read(BUS_AND_STATUS_REG) & BASR_END_DMA_TRANSFER))
640 printk(KERN_ERR "53C400r: no end dma signal\n");
641
642 NCR5380_write(MODE_REG, MR_BASE);
643 NCR5380_read(RESET_PARITY_INTERRUPT_REG);
644 return 0;
645}
646
647/**
648 * NCR5380_write - pseudo DMA write
649 * @instance: adapter to read from
650 * @dst: buffer to read into
651 * @len: buffer length
652 *
653 * Perform a pseudo DMA mode read from an NCR53C400 or equivalent
654 * controller
655 */
656
657static inline int NCR5380_pwrite(struct Scsi_Host *instance, unsigned char *src, int len)
658{
659 int blocks = len / 128;
660 int start = 0;
661 int bl;
662 int i;
663
664 NCR5380_local_declare();
665 NCR5380_setup(instance);
666
667 NCR5380_write(C400_CONTROL_STATUS_REG, CSR_BASE);
668 NCR5380_write(C400_BLOCK_COUNTER_REG, blocks);
669 while (1) {
670 if (NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_GATED_53C80_IRQ) {
671 printk(KERN_ERR "53C400w: Got 53C80_IRQ start=%d, blocks=%d\n", start, blocks);
672 return -1;
673 }
674
675 if ((bl = NCR5380_read(C400_BLOCK_COUNTER_REG)) == 0) {
676 break;
677 }
678 while (NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_HOST_BUF_NOT_RDY)
679 ; // FIXME - timeout
680#ifndef SCSI_G_NCR5380_MEM
681 {
682 for (i = 0; i < 128; i++)
683 NCR5380_write(C400_HOST_BUFFER, src[start + i]);
684 }
685#else
686 /* implies SCSI_G_NCR5380_MEM */
687 memcpy_toio(iomem + NCR53C400_host_buffer, src + start, 128);
688#endif
689 start += 128;
690 blocks--;
691 }
692 if (blocks) {
693 while (NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_HOST_BUF_NOT_RDY)
694 ; // FIXME - no timeout
695
696#ifndef SCSI_G_NCR5380_MEM
697 {
698 for (i = 0; i < 128; i++)
699 NCR5380_write(C400_HOST_BUFFER, src[start + i]);
700 }
701#else
702 /* implies SCSI_G_NCR5380_MEM */
703 memcpy_toio(iomem + NCR53C400_host_buffer, src + start, 128);
704#endif
705 start += 128;
706 blocks--;
707 }
708
709#if 0
710 printk("53C400w: waiting for registers to be available\n");
711 THEY NEVER DO ! while (NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_53C80_REG);
712 printk("53C400w: Got em\n");
713#endif
714
715 /* Let's wait for this instead - could be ugly */
716 /* All documentation says to check for this. Maybe my hardware is too
717 * fast. Waiting for it seems to work fine! KLL
718 */
719 while (!(i = NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_GATED_53C80_IRQ))
720 ; // FIXME - no timeout
721
722 /*
723 * I know. i is certainly != 0 here but the loop is new. See previous
724 * comment.
725 */
726 if (i) {
727 if (!((i = NCR5380_read(BUS_AND_STATUS_REG)) & BASR_END_DMA_TRANSFER))
728 printk(KERN_ERR "53C400w: No END OF DMA bit - WHOOPS! BASR=%0x\n", i);
729 } else
730 printk(KERN_ERR "53C400w: no 53C80 gated irq after transfer (last block)\n");
731
732#if 0
733 if (!(NCR5380_read(BUS_AND_STATUS_REG) & BASR_END_DMA_TRANSFER)) {
734 printk(KERN_ERR "53C400w: no end dma signal\n");
735 }
736#endif
737 while (!(NCR5380_read(TARGET_COMMAND_REG) & TCR_LAST_BYTE_SENT))
738 ; // TIMEOUT
739 return 0;
740}
741#endif /* PSEUDO_DMA */
742
743/*
744 * Include the NCR5380 core code that we build our driver around
745 */
746
747#include "NCR5380.c"
748
749#define PRINTP(x) len += sprintf(buffer+len, x)
750#define ANDP ,
751
752static int sprint_opcode(char *buffer, int len, int opcode)
753{
754 int start = len;
755 PRINTP("0x%02x " ANDP opcode);
756 return len - start;
757}
758
759static int sprint_command(char *buffer, int len, unsigned char *command)
760{
761 int i, s, start = len;
762 len += sprint_opcode(buffer, len, command[0]);
763 for (i = 1, s = COMMAND_SIZE(command[0]); i < s; ++i)
764 PRINTP("%02x " ANDP command[i]);
765 PRINTP("\n");
766 return len - start;
767}
768
769/**
770 * sprintf_Scsi_Cmnd - print a scsi command
771 * @buffer: buffr to print into
772 * @len: buffer length
773 * @cmd: SCSI command block
774 *
775 * Print out the target and command data in hex
776 */
777
778static int sprint_Scsi_Cmnd(char *buffer, int len, Scsi_Cmnd * cmd)
779{
780 int start = len;
781 PRINTP("host number %d destination target %d, lun %d\n" ANDP cmd->device->host->host_no ANDP cmd->device->id ANDP cmd->device->lun);
782 PRINTP(" command = ");
783 len += sprint_command(buffer, len, cmd->cmnd);
784 return len - start;
785}
786
787/**
788 * generic_NCR5380_proc_info - /proc for NCR5380 driver
789 * @buffer: buffer to print into
790 * @start: start position
791 * @offset: offset into buffer
792 * @len: length
793 * @hostno: instance to affect
794 * @inout: read/write
795 *
796 * Provide the procfs information for the 5380 controller. We fill
797 * this with useful debugging information including the commands
798 * being executed, disconnected command queue and the statistical
799 * data
800 *
801 * Locks: global cli/lock for queue walk
802 */
803
804static int generic_NCR5380_proc_info(struct Scsi_Host *scsi_ptr, char *buffer, char **start, off_t offset, int length, int inout)
805{
806 int len = 0;
807 NCR5380_local_declare();
808 unsigned long flags;
809 unsigned char status;
810 int i;
811 Scsi_Cmnd *ptr;
812 struct NCR5380_hostdata *hostdata;
813#ifdef NCR5380_STATS
814 struct scsi_device *dev;
815#endif
816
817 NCR5380_setup(scsi_ptr);
818 hostdata = (struct NCR5380_hostdata *) scsi_ptr->hostdata;
819
820 spin_lock_irqsave(scsi_ptr->host_lock, flags);
821 PRINTP("SCSI host number %d : %s\n" ANDP scsi_ptr->host_no ANDP scsi_ptr->hostt->name);
822 PRINTP("Generic NCR5380 driver version %d\n" ANDP GENERIC_NCR5380_PUBLIC_RELEASE);
823 PRINTP("NCR5380 core version %d\n" ANDP NCR5380_PUBLIC_RELEASE);
824#ifdef NCR53C400
825 PRINTP("NCR53C400 extension version %d\n" ANDP NCR53C400_PUBLIC_RELEASE);
826 PRINTP("NCR53C400 card%s detected\n" ANDP(((struct NCR5380_hostdata *) scsi_ptr->hostdata)->flags & FLAG_NCR53C400) ? "" : " not");
827# if NCR53C400_PSEUDO_DMA
828 PRINTP("NCR53C400 pseudo DMA used\n");
829# endif
830#else
831 PRINTP("NO NCR53C400 driver extensions\n");
832#endif
833 PRINTP("Using %s mapping at %s 0x%lx, " ANDP STRVAL(NCR5380_map_config) ANDP STRVAL(NCR5380_map_name) ANDP scsi_ptr->NCR5380_instance_name);
834 if (scsi_ptr->irq == SCSI_IRQ_NONE)
835 PRINTP("no interrupt\n");
836 else
837 PRINTP("on interrupt %d\n" ANDP scsi_ptr->irq);
838
839#ifdef NCR5380_STATS
840 if (hostdata->connected || hostdata->issue_queue || hostdata->disconnected_queue)
841 PRINTP("There are commands pending, transfer rates may be crud\n");
842 if (hostdata->pendingr)
843 PRINTP(" %d pending reads" ANDP hostdata->pendingr);
844 if (hostdata->pendingw)
845 PRINTP(" %d pending writes" ANDP hostdata->pendingw);
846 if (hostdata->pendingr || hostdata->pendingw)
847 PRINTP("\n");
848 shost_for_each_device(dev, scsi_ptr) {
849 unsigned long br = hostdata->bytes_read[dev->id];
850 unsigned long bw = hostdata->bytes_write[dev->id];
851 long tr = hostdata->time_read[dev->id] / HZ;
852 long tw = hostdata->time_write[dev->id] / HZ;
853
854 PRINTP(" T:%d %s " ANDP dev->id ANDP scsi_device_type(dev->type));
855 for (i = 0; i < 8; i++)
856 if (dev->vendor[i] >= 0x20)
857 *(buffer + (len++)) = dev->vendor[i];
858 *(buffer + (len++)) = ' ';
859 for (i = 0; i < 16; i++)
860 if (dev->model[i] >= 0x20)
861 *(buffer + (len++)) = dev->model[i];
862 *(buffer + (len++)) = ' ';
863 for (i = 0; i < 4; i++)
864 if (dev->rev[i] >= 0x20)
865 *(buffer + (len++)) = dev->rev[i];
866 *(buffer + (len++)) = ' ';
867
868 PRINTP("\n%10ld kb read in %5ld secs" ANDP br / 1024 ANDP tr);
869 if (tr)
870 PRINTP(" @ %5ld bps" ANDP br / tr);
871
872 PRINTP("\n%10ld kb written in %5ld secs" ANDP bw / 1024 ANDP tw);
873 if (tw)
874 PRINTP(" @ %5ld bps" ANDP bw / tw);
875 PRINTP("\n");
876 }
877#endif
878
879 status = NCR5380_read(STATUS_REG);
880 if (!(status & SR_REQ))
881 PRINTP("REQ not asserted, phase unknown.\n");
882 else {
883 for (i = 0; (phases[i].value != PHASE_UNKNOWN) && (phases[i].value != (status & PHASE_MASK)); ++i);
884 PRINTP("Phase %s\n" ANDP phases[i].name);
885 }
886
887 if (!hostdata->connected) {
888 PRINTP("No currently connected command\n");
889 } else {
890 len += sprint_Scsi_Cmnd(buffer, len, (Scsi_Cmnd *) hostdata->connected);
891 }
892
893 PRINTP("issue_queue\n");
894
895 for (ptr = (Scsi_Cmnd *) hostdata->issue_queue; ptr; ptr = (Scsi_Cmnd *) ptr->host_scribble)
896 len += sprint_Scsi_Cmnd(buffer, len, ptr);
897
898 PRINTP("disconnected_queue\n");
899
900 for (ptr = (Scsi_Cmnd *) hostdata->disconnected_queue; ptr; ptr = (Scsi_Cmnd *) ptr->host_scribble)
901 len += sprint_Scsi_Cmnd(buffer, len, ptr);
902
903 *start = buffer + offset;
904 len -= offset;
905 if (len > length)
906 len = length;
907 spin_unlock_irqrestore(scsi_ptr->host_lock, flags);
908 return len;
909}
910
911#undef PRINTP
912#undef ANDP
913
914static struct scsi_host_template driver_template = {
915 .proc_info = generic_NCR5380_proc_info,
916 .name = "Generic NCR5380/NCR53C400 Scsi Driver",
917 .detect = generic_NCR5380_detect,
918 .release = generic_NCR5380_release_resources,
919 .info = generic_NCR5380_info,
920 .queuecommand = generic_NCR5380_queue_command,
921 .eh_abort_handler = generic_NCR5380_abort,
922 .eh_bus_reset_handler = generic_NCR5380_bus_reset,
923 .bios_param = NCR5380_BIOSPARAM,
924 .can_queue = CAN_QUEUE,
925 .this_id = 7,
926 .sg_tablesize = SG_ALL,
927 .cmd_per_lun = CMD_PER_LUN,
928 .use_clustering = DISABLE_CLUSTERING,
929};
930#include <linux/module.h>
931#include "scsi_module.c"
932
933module_param(ncr_irq, int, 0);
934module_param(ncr_dma, int, 0);
935module_param(ncr_addr, int, 0);
936module_param(ncr_5380, int, 0);
937module_param(ncr_53c400, int, 0);
938module_param(ncr_53c400a, int, 0);
939module_param(dtc_3181e, int, 0);
940MODULE_LICENSE("GPL");
941
942#ifndef SCSI_G_NCR5380_MEM
943static struct isapnp_device_id id_table[] __devinitdata = {
944 {
945 ISAPNP_ANY_ID, ISAPNP_ANY_ID,
946 ISAPNP_VENDOR('D', 'T', 'C'), ISAPNP_FUNCTION(0x436e),
947 0},
948 {0}
949};
950
951MODULE_DEVICE_TABLE(isapnp, id_table);
952#endif
953
954__setup("ncr5380=", do_NCR5380_setup);
955__setup("ncr53c400=", do_NCR53C400_setup);
956__setup("ncr53c400a=", do_NCR53C400A_setup);
957__setup("dtc3181e=", do_DTC3181E_setup);
1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Generic Generic NCR5380 driver
4 *
5 * Copyright 1993, Drew Eckhardt
6 * Visionary Computing
7 * (Unix and Linux consulting and custom programming)
8 * drew@colorado.edu
9 * +1 (303) 440-4894
10 *
11 * NCR53C400 extensions (c) 1994,1995,1996, Kevin Lentin
12 * K.Lentin@cs.monash.edu.au
13 *
14 * NCR53C400A extensions (c) 1996, Ingmar Baumgart
15 * ingmar@gonzo.schwaben.de
16 *
17 * DTC3181E extensions (c) 1997, Ronald van Cuijlenborg
18 * ronald.van.cuijlenborg@tip.nl or nutty@dds.nl
19 *
20 * Added ISAPNP support for DTC436 adapters,
21 * Thomas Sailer, sailer@ife.ee.ethz.ch
22 *
23 * See Documentation/scsi/g_NCR5380.txt for more info.
24 */
25
26#include <asm/io.h>
27#include <linux/blkdev.h>
28#include <linux/module.h>
29#include <scsi/scsi_host.h>
30#include <linux/init.h>
31#include <linux/ioport.h>
32#include <linux/isa.h>
33#include <linux/pnp.h>
34#include <linux/interrupt.h>
35
36/* Definitions for the core NCR5380 driver. */
37
38#define NCR5380_read(reg) \
39 ioread8(hostdata->io + hostdata->offset + (reg))
40#define NCR5380_write(reg, value) \
41 iowrite8(value, hostdata->io + hostdata->offset + (reg))
42
43#define NCR5380_implementation_fields \
44 int offset; \
45 int c400_ctl_status; \
46 int c400_blk_cnt; \
47 int c400_host_buf; \
48 int io_width; \
49 int pdma_residual; \
50 int board
51
52#define NCR5380_dma_xfer_len generic_NCR5380_dma_xfer_len
53#define NCR5380_dma_recv_setup generic_NCR5380_precv
54#define NCR5380_dma_send_setup generic_NCR5380_psend
55#define NCR5380_dma_residual generic_NCR5380_dma_residual
56
57#define NCR5380_intr generic_NCR5380_intr
58#define NCR5380_queue_command generic_NCR5380_queue_command
59#define NCR5380_abort generic_NCR5380_abort
60#define NCR5380_host_reset generic_NCR5380_host_reset
61#define NCR5380_info generic_NCR5380_info
62
63#define NCR5380_io_delay(x) udelay(x)
64
65#include "NCR5380.h"
66
67#define DRV_MODULE_NAME "g_NCR5380"
68
69#define NCR53C400_mem_base 0x3880
70#define NCR53C400_host_buffer 0x3900
71#define NCR53C400_region_size 0x3a00
72
73#define BOARD_NCR5380 0
74#define BOARD_NCR53C400 1
75#define BOARD_NCR53C400A 2
76#define BOARD_DTC3181E 3
77#define BOARD_HP_C2502 4
78
79#define IRQ_AUTO 254
80
81#define MAX_CARDS 8
82#define DMA_MAX_SIZE 32768
83
84/* old-style parameters for compatibility */
85static int ncr_irq = -1;
86static int ncr_addr;
87static int ncr_5380;
88static int ncr_53c400;
89static int ncr_53c400a;
90static int dtc_3181e;
91static int hp_c2502;
92module_param_hw(ncr_irq, int, irq, 0);
93module_param_hw(ncr_addr, int, ioport, 0);
94module_param(ncr_5380, int, 0);
95module_param(ncr_53c400, int, 0);
96module_param(ncr_53c400a, int, 0);
97module_param(dtc_3181e, int, 0);
98module_param(hp_c2502, int, 0);
99
100static int irq[] = { -1, -1, -1, -1, -1, -1, -1, -1 };
101module_param_hw_array(irq, int, irq, NULL, 0);
102MODULE_PARM_DESC(irq, "IRQ number(s) (0=none, 254=auto [default])");
103
104static int base[] = { 0, 0, 0, 0, 0, 0, 0, 0 };
105module_param_hw_array(base, int, ioport, NULL, 0);
106MODULE_PARM_DESC(base, "base address(es)");
107
108static int card[] = { -1, -1, -1, -1, -1, -1, -1, -1 };
109module_param_array(card, int, NULL, 0);
110MODULE_PARM_DESC(card, "card type (0=NCR5380, 1=NCR53C400, 2=NCR53C400A, 3=DTC3181E, 4=HP C2502)");
111
112MODULE_ALIAS("g_NCR5380_mmio");
113MODULE_LICENSE("GPL");
114
115static void g_NCR5380_trigger_irq(struct Scsi_Host *instance)
116{
117 struct NCR5380_hostdata *hostdata = shost_priv(instance);
118
119 /*
120 * An interrupt is triggered whenever BSY = false, SEL = true
121 * and a bit set in the SELECT_ENABLE_REG is asserted on the
122 * SCSI bus.
123 *
124 * Note that the bus is only driven when the phase control signals
125 * (I/O, C/D, and MSG) match those in the TCR.
126 */
127 NCR5380_write(TARGET_COMMAND_REG,
128 PHASE_SR_TO_TCR(NCR5380_read(STATUS_REG) & PHASE_MASK));
129 NCR5380_write(SELECT_ENABLE_REG, hostdata->id_mask);
130 NCR5380_write(OUTPUT_DATA_REG, hostdata->id_mask);
131 NCR5380_write(INITIATOR_COMMAND_REG,
132 ICR_BASE | ICR_ASSERT_DATA | ICR_ASSERT_SEL);
133
134 msleep(1);
135
136 NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE);
137 NCR5380_write(SELECT_ENABLE_REG, 0);
138 NCR5380_write(TARGET_COMMAND_REG, 0);
139}
140
141/**
142 * g_NCR5380_probe_irq - find the IRQ of a NCR5380 or equivalent
143 * @instance: SCSI host instance
144 *
145 * Autoprobe for the IRQ line used by the card by triggering an IRQ
146 * and then looking to see what interrupt actually turned up.
147 */
148
149static int g_NCR5380_probe_irq(struct Scsi_Host *instance)
150{
151 struct NCR5380_hostdata *hostdata = shost_priv(instance);
152 int irq_mask, irq;
153
154 NCR5380_read(RESET_PARITY_INTERRUPT_REG);
155 irq_mask = probe_irq_on();
156 g_NCR5380_trigger_irq(instance);
157 irq = probe_irq_off(irq_mask);
158 NCR5380_read(RESET_PARITY_INTERRUPT_REG);
159
160 if (irq <= 0)
161 return NO_IRQ;
162 return irq;
163}
164
165/*
166 * Configure I/O address of 53C400A or DTC436 by writing magic numbers
167 * to ports 0x779 and 0x379.
168 */
169static void magic_configure(int idx, u8 irq, u8 magic[])
170{
171 u8 cfg = 0;
172
173 outb(magic[0], 0x779);
174 outb(magic[1], 0x379);
175 outb(magic[2], 0x379);
176 outb(magic[3], 0x379);
177 outb(magic[4], 0x379);
178
179 if (irq == 9)
180 irq = 2;
181
182 if (idx >= 0 && idx <= 7)
183 cfg = 0x80 | idx | (irq << 4);
184 outb(cfg, 0x379);
185}
186
187static irqreturn_t legacy_empty_irq_handler(int irq, void *dev_id)
188{
189 return IRQ_HANDLED;
190}
191
192static int legacy_find_free_irq(int *irq_table)
193{
194 while (*irq_table != -1) {
195 if (!request_irq(*irq_table, legacy_empty_irq_handler,
196 IRQF_PROBE_SHARED, "Test IRQ",
197 (void *)irq_table)) {
198 free_irq(*irq_table, (void *) irq_table);
199 return *irq_table;
200 }
201 irq_table++;
202 }
203 return -1;
204}
205
206static unsigned int ncr_53c400a_ports[] = {
207 0x280, 0x290, 0x300, 0x310, 0x330, 0x340, 0x348, 0x350, 0
208};
209static unsigned int dtc_3181e_ports[] = {
210 0x220, 0x240, 0x280, 0x2a0, 0x2c0, 0x300, 0x320, 0x340, 0
211};
212static u8 ncr_53c400a_magic[] = { /* 53C400A & DTC436 */
213 0x59, 0xb9, 0xc5, 0xae, 0xa6
214};
215static u8 hp_c2502_magic[] = { /* HP C2502 */
216 0x0f, 0x22, 0xf0, 0x20, 0x80
217};
218static int hp_c2502_irqs[] = {
219 9, 5, 7, 3, 4, -1
220};
221
222static int generic_NCR5380_init_one(struct scsi_host_template *tpnt,
223 struct device *pdev, int base, int irq, int board)
224{
225 bool is_pmio = base <= 0xffff;
226 int ret;
227 int flags = 0;
228 unsigned int *ports = NULL;
229 u8 *magic = NULL;
230 int i;
231 int port_idx = -1;
232 unsigned long region_size;
233 struct Scsi_Host *instance;
234 struct NCR5380_hostdata *hostdata;
235 u8 __iomem *iomem;
236
237 switch (board) {
238 case BOARD_NCR5380:
239 flags = FLAG_NO_PSEUDO_DMA | FLAG_DMA_FIXUP;
240 break;
241 case BOARD_NCR53C400A:
242 ports = ncr_53c400a_ports;
243 magic = ncr_53c400a_magic;
244 break;
245 case BOARD_HP_C2502:
246 ports = ncr_53c400a_ports;
247 magic = hp_c2502_magic;
248 break;
249 case BOARD_DTC3181E:
250 ports = dtc_3181e_ports;
251 magic = ncr_53c400a_magic;
252 break;
253 }
254
255 if (is_pmio && ports && magic) {
256 /* wakeup sequence for the NCR53C400A and DTC3181E */
257
258 /* Disable the adapter and look for a free io port */
259 magic_configure(-1, 0, magic);
260
261 region_size = 16;
262 if (base)
263 for (i = 0; ports[i]; i++) {
264 if (base == ports[i]) { /* index found */
265 if (!request_region(ports[i],
266 region_size,
267 "ncr53c80"))
268 return -EBUSY;
269 break;
270 }
271 }
272 else
273 for (i = 0; ports[i]; i++) {
274 if (!request_region(ports[i], region_size,
275 "ncr53c80"))
276 continue;
277 if (inb(ports[i]) == 0xff)
278 break;
279 release_region(ports[i], region_size);
280 }
281 if (ports[i]) {
282 /* At this point we have our region reserved */
283 magic_configure(i, 0, magic); /* no IRQ yet */
284 base = ports[i];
285 outb(0xc0, base + 9);
286 if (inb(base + 9) != 0x80) {
287 ret = -ENODEV;
288 goto out_release;
289 }
290 port_idx = i;
291 } else
292 return -EINVAL;
293 } else if (is_pmio) {
294 /* NCR5380 - no configuration, just grab */
295 region_size = 8;
296 if (!base || !request_region(base, region_size, "ncr5380"))
297 return -EBUSY;
298 } else { /* MMIO */
299 region_size = NCR53C400_region_size;
300 if (!request_mem_region(base, region_size, "ncr5380"))
301 return -EBUSY;
302 }
303
304 if (is_pmio)
305 iomem = ioport_map(base, region_size);
306 else
307 iomem = ioremap(base, region_size);
308
309 if (!iomem) {
310 ret = -ENOMEM;
311 goto out_release;
312 }
313
314 instance = scsi_host_alloc(tpnt, sizeof(struct NCR5380_hostdata));
315 if (instance == NULL) {
316 ret = -ENOMEM;
317 goto out_unmap;
318 }
319 hostdata = shost_priv(instance);
320
321 hostdata->board = board;
322 hostdata->io = iomem;
323 hostdata->region_size = region_size;
324
325 if (is_pmio) {
326 hostdata->io_port = base;
327 hostdata->io_width = 1; /* 8-bit PDMA by default */
328 hostdata->offset = 0;
329
330 /*
331 * On NCR53C400 boards, NCR5380 registers are mapped 8 past
332 * the base address.
333 */
334 switch (board) {
335 case BOARD_NCR53C400:
336 hostdata->io_port += 8;
337 hostdata->c400_ctl_status = 0;
338 hostdata->c400_blk_cnt = 1;
339 hostdata->c400_host_buf = 4;
340 break;
341 case BOARD_DTC3181E:
342 hostdata->io_width = 2; /* 16-bit PDMA */
343 /* fall through */
344 case BOARD_NCR53C400A:
345 case BOARD_HP_C2502:
346 hostdata->c400_ctl_status = 9;
347 hostdata->c400_blk_cnt = 10;
348 hostdata->c400_host_buf = 8;
349 break;
350 }
351 } else {
352 hostdata->base = base;
353 hostdata->offset = NCR53C400_mem_base;
354 switch (board) {
355 case BOARD_NCR53C400:
356 hostdata->c400_ctl_status = 0x100;
357 hostdata->c400_blk_cnt = 0x101;
358 hostdata->c400_host_buf = 0x104;
359 break;
360 case BOARD_DTC3181E:
361 case BOARD_NCR53C400A:
362 case BOARD_HP_C2502:
363 pr_err(DRV_MODULE_NAME ": unknown register offsets\n");
364 ret = -EINVAL;
365 goto out_unregister;
366 }
367 }
368
369 /* Check for vacant slot */
370 NCR5380_write(MODE_REG, 0);
371 if (NCR5380_read(MODE_REG) != 0) {
372 ret = -ENODEV;
373 goto out_unregister;
374 }
375
376 ret = NCR5380_init(instance, flags | FLAG_LATE_DMA_SETUP);
377 if (ret)
378 goto out_unregister;
379
380 switch (board) {
381 case BOARD_NCR53C400:
382 case BOARD_DTC3181E:
383 case BOARD_NCR53C400A:
384 case BOARD_HP_C2502:
385 NCR5380_write(hostdata->c400_ctl_status, CSR_BASE);
386 }
387
388 NCR5380_maybe_reset_bus(instance);
389
390 /* Compatibility with documented NCR5380 kernel parameters */
391 if (irq == 255 || irq == 0)
392 irq = NO_IRQ;
393 else if (irq == -1)
394 irq = IRQ_AUTO;
395
396 if (board == BOARD_HP_C2502) {
397 int *irq_table = hp_c2502_irqs;
398 int board_irq = -1;
399
400 switch (irq) {
401 case NO_IRQ:
402 board_irq = 0;
403 break;
404 case IRQ_AUTO:
405 board_irq = legacy_find_free_irq(irq_table);
406 break;
407 default:
408 while (*irq_table != -1)
409 if (*irq_table++ == irq)
410 board_irq = irq;
411 }
412
413 if (board_irq <= 0) {
414 board_irq = 0;
415 irq = NO_IRQ;
416 }
417
418 magic_configure(port_idx, board_irq, magic);
419 }
420
421 if (irq == IRQ_AUTO) {
422 instance->irq = g_NCR5380_probe_irq(instance);
423 if (instance->irq == NO_IRQ)
424 shost_printk(KERN_INFO, instance, "no irq detected\n");
425 } else {
426 instance->irq = irq;
427 if (instance->irq == NO_IRQ)
428 shost_printk(KERN_INFO, instance, "no irq provided\n");
429 }
430
431 if (instance->irq != NO_IRQ) {
432 if (request_irq(instance->irq, generic_NCR5380_intr,
433 0, "NCR5380", instance)) {
434 instance->irq = NO_IRQ;
435 shost_printk(KERN_INFO, instance,
436 "irq %d denied\n", instance->irq);
437 } else {
438 shost_printk(KERN_INFO, instance,
439 "irq %d acquired\n", instance->irq);
440 }
441 }
442
443 ret = scsi_add_host(instance, pdev);
444 if (ret)
445 goto out_free_irq;
446 scsi_scan_host(instance);
447 dev_set_drvdata(pdev, instance);
448 return 0;
449
450out_free_irq:
451 if (instance->irq != NO_IRQ)
452 free_irq(instance->irq, instance);
453 NCR5380_exit(instance);
454out_unregister:
455 scsi_host_put(instance);
456out_unmap:
457 iounmap(iomem);
458out_release:
459 if (is_pmio)
460 release_region(base, region_size);
461 else
462 release_mem_region(base, region_size);
463 return ret;
464}
465
466static void generic_NCR5380_release_resources(struct Scsi_Host *instance)
467{
468 struct NCR5380_hostdata *hostdata = shost_priv(instance);
469 void __iomem *iomem = hostdata->io;
470 unsigned long io_port = hostdata->io_port;
471 unsigned long base = hostdata->base;
472 unsigned long region_size = hostdata->region_size;
473
474 scsi_remove_host(instance);
475 if (instance->irq != NO_IRQ)
476 free_irq(instance->irq, instance);
477 NCR5380_exit(instance);
478 scsi_host_put(instance);
479 iounmap(iomem);
480 if (io_port)
481 release_region(io_port, region_size);
482 else
483 release_mem_region(base, region_size);
484}
485
486/* wait_for_53c80_access - wait for 53C80 registers to become accessible
487 * @hostdata: scsi host private data
488 *
489 * The registers within the 53C80 logic block are inaccessible until
490 * bit 7 in the 53C400 control status register gets asserted.
491 */
492
493static void wait_for_53c80_access(struct NCR5380_hostdata *hostdata)
494{
495 int count = 10000;
496
497 do {
498 if (hostdata->board == BOARD_DTC3181E)
499 udelay(4); /* DTC436 chip hangs without this */
500 if (NCR5380_read(hostdata->c400_ctl_status) & CSR_53C80_REG)
501 return;
502 } while (--count > 0);
503
504 scmd_printk(KERN_ERR, hostdata->connected,
505 "53c80 registers not accessible, device will be reset\n");
506 NCR5380_write(hostdata->c400_ctl_status, CSR_RESET);
507 NCR5380_write(hostdata->c400_ctl_status, CSR_BASE);
508}
509
510/**
511 * generic_NCR5380_precv - pseudo DMA receive
512 * @hostdata: scsi host private data
513 * @dst: buffer to write into
514 * @len: transfer size
515 *
516 * Perform a pseudo DMA mode receive from a 53C400 or equivalent device.
517 */
518
519static inline int generic_NCR5380_precv(struct NCR5380_hostdata *hostdata,
520 unsigned char *dst, int len)
521{
522 int residual;
523 int start = 0;
524
525 NCR5380_write(hostdata->c400_ctl_status, CSR_BASE | CSR_TRANS_DIR);
526 NCR5380_write(hostdata->c400_blk_cnt, len / 128);
527
528 do {
529 if (start == len - 128) {
530 /* Ignore End of DMA interrupt for the final buffer */
531 if (NCR5380_poll_politely(hostdata, hostdata->c400_ctl_status,
532 CSR_HOST_BUF_NOT_RDY, 0, HZ / 64) < 0)
533 break;
534 } else {
535 if (NCR5380_poll_politely2(hostdata, hostdata->c400_ctl_status,
536 CSR_HOST_BUF_NOT_RDY, 0,
537 hostdata->c400_ctl_status,
538 CSR_GATED_53C80_IRQ,
539 CSR_GATED_53C80_IRQ, HZ / 64) < 0 ||
540 NCR5380_read(hostdata->c400_ctl_status) & CSR_HOST_BUF_NOT_RDY)
541 break;
542 }
543
544 if (hostdata->io_port && hostdata->io_width == 2)
545 insw(hostdata->io_port + hostdata->c400_host_buf,
546 dst + start, 64);
547 else if (hostdata->io_port)
548 insb(hostdata->io_port + hostdata->c400_host_buf,
549 dst + start, 128);
550 else
551 memcpy_fromio(dst + start,
552 hostdata->io + NCR53C400_host_buffer, 128);
553 start += 128;
554 } while (start < len);
555
556 residual = len - start;
557
558 if (residual != 0) {
559 /* 53c80 interrupt or transfer timeout. Reset 53c400 logic. */
560 NCR5380_write(hostdata->c400_ctl_status, CSR_RESET);
561 NCR5380_write(hostdata->c400_ctl_status, CSR_BASE);
562 }
563 wait_for_53c80_access(hostdata);
564
565 if (residual == 0 && NCR5380_poll_politely(hostdata, BUS_AND_STATUS_REG,
566 BASR_END_DMA_TRANSFER,
567 BASR_END_DMA_TRANSFER,
568 HZ / 64) < 0)
569 scmd_printk(KERN_ERR, hostdata->connected, "%s: End of DMA timeout\n",
570 __func__);
571
572 hostdata->pdma_residual = residual;
573
574 return 0;
575}
576
577/**
578 * generic_NCR5380_psend - pseudo DMA send
579 * @hostdata: scsi host private data
580 * @src: buffer to read from
581 * @len: transfer size
582 *
583 * Perform a pseudo DMA mode send to a 53C400 or equivalent device.
584 */
585
586static inline int generic_NCR5380_psend(struct NCR5380_hostdata *hostdata,
587 unsigned char *src, int len)
588{
589 int residual;
590 int start = 0;
591
592 NCR5380_write(hostdata->c400_ctl_status, CSR_BASE);
593 NCR5380_write(hostdata->c400_blk_cnt, len / 128);
594
595 do {
596 if (NCR5380_poll_politely2(hostdata, hostdata->c400_ctl_status,
597 CSR_HOST_BUF_NOT_RDY, 0,
598 hostdata->c400_ctl_status,
599 CSR_GATED_53C80_IRQ,
600 CSR_GATED_53C80_IRQ, HZ / 64) < 0 ||
601 NCR5380_read(hostdata->c400_ctl_status) & CSR_HOST_BUF_NOT_RDY) {
602 /* Both 128 B buffers are in use */
603 if (start >= 128)
604 start -= 128;
605 if (start >= 128)
606 start -= 128;
607 break;
608 }
609
610 if (start >= len && NCR5380_read(hostdata->c400_blk_cnt) == 0)
611 break;
612
613 if (NCR5380_read(hostdata->c400_ctl_status) & CSR_GATED_53C80_IRQ) {
614 /* Host buffer is empty, other one is in use */
615 if (start >= 128)
616 start -= 128;
617 break;
618 }
619
620 if (start >= len)
621 continue;
622
623 if (hostdata->io_port && hostdata->io_width == 2)
624 outsw(hostdata->io_port + hostdata->c400_host_buf,
625 src + start, 64);
626 else if (hostdata->io_port)
627 outsb(hostdata->io_port + hostdata->c400_host_buf,
628 src + start, 128);
629 else
630 memcpy_toio(hostdata->io + NCR53C400_host_buffer,
631 src + start, 128);
632 start += 128;
633 } while (1);
634
635 residual = len - start;
636
637 if (residual != 0) {
638 /* 53c80 interrupt or transfer timeout. Reset 53c400 logic. */
639 NCR5380_write(hostdata->c400_ctl_status, CSR_RESET);
640 NCR5380_write(hostdata->c400_ctl_status, CSR_BASE);
641 }
642 wait_for_53c80_access(hostdata);
643
644 if (residual == 0) {
645 if (NCR5380_poll_politely(hostdata, TARGET_COMMAND_REG,
646 TCR_LAST_BYTE_SENT, TCR_LAST_BYTE_SENT,
647 HZ / 64) < 0)
648 scmd_printk(KERN_ERR, hostdata->connected,
649 "%s: Last Byte Sent timeout\n", __func__);
650
651 if (NCR5380_poll_politely(hostdata, BUS_AND_STATUS_REG,
652 BASR_END_DMA_TRANSFER, BASR_END_DMA_TRANSFER,
653 HZ / 64) < 0)
654 scmd_printk(KERN_ERR, hostdata->connected, "%s: End of DMA timeout\n",
655 __func__);
656 }
657
658 hostdata->pdma_residual = residual;
659
660 return 0;
661}
662
663static int generic_NCR5380_dma_xfer_len(struct NCR5380_hostdata *hostdata,
664 struct scsi_cmnd *cmd)
665{
666 int transfersize = cmd->SCp.this_residual;
667
668 if (hostdata->flags & FLAG_NO_PSEUDO_DMA)
669 return 0;
670
671 /* 53C400 datasheet: non-modulo-128-byte transfers should use PIO */
672 if (transfersize % 128)
673 return 0;
674
675 /* Limit PDMA send to 512 B to avoid random corruption on DTC3181E */
676 if (hostdata->board == BOARD_DTC3181E &&
677 cmd->sc_data_direction == DMA_TO_DEVICE)
678 transfersize = min(cmd->SCp.this_residual, 512);
679
680 return min(transfersize, DMA_MAX_SIZE);
681}
682
683static int generic_NCR5380_dma_residual(struct NCR5380_hostdata *hostdata)
684{
685 return hostdata->pdma_residual;
686}
687
688/* Include the core driver code. */
689
690#include "NCR5380.c"
691
692static struct scsi_host_template driver_template = {
693 .module = THIS_MODULE,
694 .proc_name = DRV_MODULE_NAME,
695 .name = "Generic NCR5380/NCR53C400 SCSI",
696 .info = generic_NCR5380_info,
697 .queuecommand = generic_NCR5380_queue_command,
698 .eh_abort_handler = generic_NCR5380_abort,
699 .eh_host_reset_handler = generic_NCR5380_host_reset,
700 .can_queue = 16,
701 .this_id = 7,
702 .sg_tablesize = SG_ALL,
703 .cmd_per_lun = 2,
704 .dma_boundary = PAGE_SIZE - 1,
705 .cmd_size = NCR5380_CMD_SIZE,
706 .max_sectors = 128,
707};
708
709static int generic_NCR5380_isa_match(struct device *pdev, unsigned int ndev)
710{
711 int ret = generic_NCR5380_init_one(&driver_template, pdev, base[ndev],
712 irq[ndev], card[ndev]);
713 if (ret) {
714 if (base[ndev])
715 printk(KERN_WARNING "Card not found at address 0x%03x\n",
716 base[ndev]);
717 return 0;
718 }
719
720 return 1;
721}
722
723static int generic_NCR5380_isa_remove(struct device *pdev,
724 unsigned int ndev)
725{
726 generic_NCR5380_release_resources(dev_get_drvdata(pdev));
727 dev_set_drvdata(pdev, NULL);
728 return 0;
729}
730
731static struct isa_driver generic_NCR5380_isa_driver = {
732 .match = generic_NCR5380_isa_match,
733 .remove = generic_NCR5380_isa_remove,
734 .driver = {
735 .name = DRV_MODULE_NAME
736 },
737};
738
739#ifdef CONFIG_PNP
740static const struct pnp_device_id generic_NCR5380_pnp_ids[] = {
741 { .id = "DTC436e", .driver_data = BOARD_DTC3181E },
742 { .id = "" }
743};
744MODULE_DEVICE_TABLE(pnp, generic_NCR5380_pnp_ids);
745
746static int generic_NCR5380_pnp_probe(struct pnp_dev *pdev,
747 const struct pnp_device_id *id)
748{
749 int base, irq;
750
751 if (pnp_activate_dev(pdev) < 0)
752 return -EBUSY;
753
754 base = pnp_port_start(pdev, 0);
755 irq = pnp_irq(pdev, 0);
756
757 return generic_NCR5380_init_one(&driver_template, &pdev->dev, base, irq,
758 id->driver_data);
759}
760
761static void generic_NCR5380_pnp_remove(struct pnp_dev *pdev)
762{
763 generic_NCR5380_release_resources(pnp_get_drvdata(pdev));
764 pnp_set_drvdata(pdev, NULL);
765}
766
767static struct pnp_driver generic_NCR5380_pnp_driver = {
768 .name = DRV_MODULE_NAME,
769 .id_table = generic_NCR5380_pnp_ids,
770 .probe = generic_NCR5380_pnp_probe,
771 .remove = generic_NCR5380_pnp_remove,
772};
773#endif /* defined(CONFIG_PNP) */
774
775static int pnp_registered, isa_registered;
776
777static int __init generic_NCR5380_init(void)
778{
779 int ret = 0;
780
781 /* compatibility with old-style parameters */
782 if (irq[0] == -1 && base[0] == 0 && card[0] == -1) {
783 irq[0] = ncr_irq;
784 base[0] = ncr_addr;
785 if (ncr_5380)
786 card[0] = BOARD_NCR5380;
787 if (ncr_53c400)
788 card[0] = BOARD_NCR53C400;
789 if (ncr_53c400a)
790 card[0] = BOARD_NCR53C400A;
791 if (dtc_3181e)
792 card[0] = BOARD_DTC3181E;
793 if (hp_c2502)
794 card[0] = BOARD_HP_C2502;
795 }
796
797#ifdef CONFIG_PNP
798 if (!pnp_register_driver(&generic_NCR5380_pnp_driver))
799 pnp_registered = 1;
800#endif
801 ret = isa_register_driver(&generic_NCR5380_isa_driver, MAX_CARDS);
802 if (!ret)
803 isa_registered = 1;
804
805 return (pnp_registered || isa_registered) ? 0 : ret;
806}
807
808static void __exit generic_NCR5380_exit(void)
809{
810#ifdef CONFIG_PNP
811 if (pnp_registered)
812 pnp_unregister_driver(&generic_NCR5380_pnp_driver);
813#endif
814 if (isa_registered)
815 isa_unregister_driver(&generic_NCR5380_isa_driver);
816}
817
818module_init(generic_NCR5380_init);
819module_exit(generic_NCR5380_exit);