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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
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
Linus Torvalds1da177e2005-04-16 15:20:36 -070021 */
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/*
Linus Torvalds1da177e2005-04-16 15:20:36 -070029 * 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
Linus Torvalds1da177e2005-04-16 15:20:36 -070059/* settings for DTC3181E card with only Mustek scanner attached */
Nicholas Mc Guire4e5a8002015-02-04 13:30:20 -050060#define USLEEP_POLL msecs_to_jiffies(10)
61#define USLEEP_SLEEP msecs_to_jiffies(200)
62#define USLEEP_WAITLONG msecs_to_jiffies(5000)
Linus Torvalds1da177e2005-04-16 15:20:36 -070063
64#define AUTOPROBE_IRQ
Linus Torvalds1da177e2005-04-16 15:20:36 -070065
66#ifdef CONFIG_SCSI_GENERIC_NCR53C400
67#define NCR53C400_PSEUDO_DMA 1
68#define PSEUDO_DMA
69#define NCR53C400
Linus Torvalds1da177e2005-04-16 15:20:36 -070070#endif
71
Linus Torvalds1da177e2005-04-16 15:20:36 -070072#include <asm/io.h>
73#include <linux/signal.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070074#include <linux/blkdev.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070075#include <scsi/scsi_host.h>
76#include "g_NCR5380.h"
77#include "NCR5380.h"
78#include <linux/stat.h>
79#include <linux/init.h>
80#include <linux/ioport.h>
81#include <linux/isapnp.h>
82#include <linux/delay.h>
83#include <linux/interrupt.h>
84
Finn Thainc0965e62016-01-03 16:05:05 +110085static int ncr_irq;
86static int ncr_dma;
87static int ncr_addr;
88static int ncr_5380;
89static int ncr_53c400;
90static int ncr_53c400a;
91static int dtc_3181e;
Linus Torvalds1da177e2005-04-16 15:20:36 -070092
93static struct override {
Al Viroc818cb62006-03-24 03:15:37 -080094 NCR5380_map_type NCR5380_map_name;
Linus Torvalds1da177e2005-04-16 15:20:36 -070095 int irq;
96 int dma;
97 int board; /* Use NCR53c400, Ricoh, etc. extensions ? */
98} overrides
99#ifdef GENERIC_NCR5380_OVERRIDE
100[] __initdata = GENERIC_NCR5380_OVERRIDE;
101#else
102[1] __initdata = { { 0,},};
103#endif
104
Tobias Klauser6391a112006-06-08 22:23:48 -0700105#define NO_OVERRIDES ARRAY_SIZE(overrides)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700106
Tobias Klauser6391a112006-06-08 22:23:48 -0700107#ifndef MODULE
Linus Torvalds1da177e2005-04-16 15:20:36 -0700108
109/**
110 * internal_setup - handle lilo command string override
111 * @board: BOARD_* identifier for the board
112 * @str: unused
113 * @ints: numeric parameters
114 *
115 * Do LILO command line initialization of the overrides array. Display
116 * errors when needed
117 *
118 * Locks: none
119 */
120
121static void __init internal_setup(int board, char *str, int *ints)
122{
Finn Thaind5f7e652016-01-03 16:05:03 +1100123 static int commandline_current;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700124 switch (board) {
125 case BOARD_NCR5380:
126 if (ints[0] != 2 && ints[0] != 3) {
127 printk(KERN_ERR "generic_NCR5380_setup : usage ncr5380=" STRVAL(NCR5380_map_name) ",irq,dma\n");
128 return;
129 }
130 break;
131 case BOARD_NCR53C400:
132 if (ints[0] != 2) {
133 printk(KERN_ERR "generic_NCR53C400_setup : usage ncr53c400=" STRVAL(NCR5380_map_name) ",irq\n");
134 return;
135 }
136 break;
137 case BOARD_NCR53C400A:
138 if (ints[0] != 2) {
139 printk(KERN_ERR "generic_NCR53C400A_setup : usage ncr53c400a=" STRVAL(NCR5380_map_name) ",irq\n");
140 return;
141 }
142 break;
143 case BOARD_DTC3181E:
144 if (ints[0] != 2) {
145 printk("generic_DTC3181E_setup : usage dtc3181e=" STRVAL(NCR5380_map_name) ",irq\n");
146 return;
147 }
148 break;
149 }
150
151 if (commandline_current < NO_OVERRIDES) {
152 overrides[commandline_current].NCR5380_map_name = (NCR5380_map_type) ints[1];
153 overrides[commandline_current].irq = ints[2];
154 if (ints[0] == 3)
155 overrides[commandline_current].dma = ints[3];
156 else
157 overrides[commandline_current].dma = DMA_NONE;
158 overrides[commandline_current].board = board;
159 ++commandline_current;
160 }
161}
162
163
164/**
165 * do_NCR53C80_setup - set up entry point
166 * @str: unused
167 *
168 * Setup function invoked at boot to parse the ncr5380= command
169 * line.
170 */
171
172static int __init do_NCR5380_setup(char *str)
173{
174 int ints[10];
175
Tobias Klauser6391a112006-06-08 22:23:48 -0700176 get_options(str, ARRAY_SIZE(ints), ints);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700177 internal_setup(BOARD_NCR5380, str, ints);
178 return 1;
179}
180
181/**
182 * do_NCR53C400_setup - set up entry point
183 * @str: unused
Tobias Klauser6391a112006-06-08 22:23:48 -0700184 * @ints: integer parameters from kernel setup code
Linus Torvalds1da177e2005-04-16 15:20:36 -0700185 *
186 * Setup function invoked at boot to parse the ncr53c400= command
187 * line.
188 */
189
190static int __init do_NCR53C400_setup(char *str)
191{
192 int ints[10];
193
Tobias Klauser6391a112006-06-08 22:23:48 -0700194 get_options(str, ARRAY_SIZE(ints), ints);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700195 internal_setup(BOARD_NCR53C400, str, ints);
196 return 1;
197}
198
199/**
200 * do_NCR53C400A_setup - set up entry point
201 * @str: unused
Tobias Klauser6391a112006-06-08 22:23:48 -0700202 * @ints: integer parameters from kernel setup code
Linus Torvalds1da177e2005-04-16 15:20:36 -0700203 *
204 * Setup function invoked at boot to parse the ncr53c400a= command
205 * line.
206 */
207
208static int __init do_NCR53C400A_setup(char *str)
209{
210 int ints[10];
211
Tobias Klauser6391a112006-06-08 22:23:48 -0700212 get_options(str, ARRAY_SIZE(ints), ints);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700213 internal_setup(BOARD_NCR53C400A, str, ints);
214 return 1;
215}
216
217/**
218 * do_DTC3181E_setup - set up entry point
219 * @str: unused
Tobias Klauser6391a112006-06-08 22:23:48 -0700220 * @ints: integer parameters from kernel setup code
Linus Torvalds1da177e2005-04-16 15:20:36 -0700221 *
222 * Setup function invoked at boot to parse the dtc3181e= command
223 * line.
224 */
225
226static int __init do_DTC3181E_setup(char *str)
227{
228 int ints[10];
229
Tobias Klauser6391a112006-06-08 22:23:48 -0700230 get_options(str, ARRAY_SIZE(ints), ints);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700231 internal_setup(BOARD_DTC3181E, str, ints);
232 return 1;
233}
234
235#endif
236
237/**
238 * generic_NCR5380_detect - look for NCR5380 controllers
239 * @tpnt: the scsi template
240 *
241 * Scan for the present of NCR5380, NCR53C400, NCR53C400A, DTC3181E
242 * and DTC436(ISAPnP) controllers. If overrides have been set we use
243 * them.
244 *
245 * The caller supplied NCR5380_init function is invoked from here, before
246 * the interrupt line is taken.
247 *
248 * Locks: none
249 */
250
Finn Thained8b9e72014-11-12 16:11:51 +1100251static int __init generic_NCR5380_detect(struct scsi_host_template *tpnt)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700252{
Finn Thaind5f7e652016-01-03 16:05:03 +1100253 static int current_override;
Ondrej Zary702a98c2010-08-10 18:01:16 -0700254 int count;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700255 unsigned int *ports;
Ondrej Zary702a98c2010-08-10 18:01:16 -0700256#ifndef SCSI_G_NCR5380_MEM
257 int i;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700258 unsigned long region_size = 16;
Ondrej Zary702a98c2010-08-10 18:01:16 -0700259#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700260 static unsigned int __initdata ncr_53c400a_ports[] = {
261 0x280, 0x290, 0x300, 0x310, 0x330, 0x340, 0x348, 0x350, 0
262 };
263 static unsigned int __initdata dtc_3181e_ports[] = {
264 0x220, 0x240, 0x280, 0x2a0, 0x2c0, 0x300, 0x320, 0x340, 0
265 };
266 int flags = 0;
267 struct Scsi_Host *instance;
Ondrej Zary702a98c2010-08-10 18:01:16 -0700268#ifdef SCSI_G_NCR5380_MEM
Al Viroc818cb62006-03-24 03:15:37 -0800269 unsigned long base;
270 void __iomem *iomem;
271#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700272
Finn Thainc0965e62016-01-03 16:05:05 +1100273 if (ncr_irq)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700274 overrides[0].irq = ncr_irq;
Finn Thainc0965e62016-01-03 16:05:05 +1100275 if (ncr_dma)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700276 overrides[0].dma = ncr_dma;
Finn Thainc0965e62016-01-03 16:05:05 +1100277 if (ncr_addr)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700278 overrides[0].NCR5380_map_name = (NCR5380_map_type) ncr_addr;
Finn Thainc0965e62016-01-03 16:05:05 +1100279 if (ncr_5380)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700280 overrides[0].board = BOARD_NCR5380;
Finn Thainc0965e62016-01-03 16:05:05 +1100281 else if (ncr_53c400)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700282 overrides[0].board = BOARD_NCR53C400;
Finn Thainc0965e62016-01-03 16:05:05 +1100283 else if (ncr_53c400a)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700284 overrides[0].board = BOARD_NCR53C400A;
Finn Thainc0965e62016-01-03 16:05:05 +1100285 else if (dtc_3181e)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700286 overrides[0].board = BOARD_DTC3181E;
Ondrej Zary702a98c2010-08-10 18:01:16 -0700287#ifndef SCSI_G_NCR5380_MEM
Linus Torvalds1da177e2005-04-16 15:20:36 -0700288 if (!current_override && isapnp_present()) {
289 struct pnp_dev *dev = NULL;
290 count = 0;
291 while ((dev = pnp_find_dev(NULL, ISAPNP_VENDOR('D', 'T', 'C'), ISAPNP_FUNCTION(0x436e), dev))) {
292 if (count >= NO_OVERRIDES)
293 break;
Ondrej Zaryc94babb2010-08-10 18:01:15 -0700294 if (pnp_device_attach(dev) < 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700295 continue;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700296 if (pnp_activate_dev(dev) < 0) {
297 printk(KERN_ERR "dtc436e probe: activate failed\n");
298 pnp_device_detach(dev);
299 continue;
300 }
301 if (!pnp_port_valid(dev, 0)) {
302 printk(KERN_ERR "dtc436e probe: no valid port\n");
303 pnp_device_detach(dev);
304 continue;
305 }
306 if (pnp_irq_valid(dev, 0))
307 overrides[count].irq = pnp_irq(dev, 0);
308 else
Finn Thain22f5f102014-11-12 16:11:56 +1100309 overrides[count].irq = NO_IRQ;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700310 if (pnp_dma_valid(dev, 0))
311 overrides[count].dma = pnp_dma(dev, 0);
312 else
313 overrides[count].dma = DMA_NONE;
314 overrides[count].NCR5380_map_name = (NCR5380_map_type) pnp_port_start(dev, 0);
315 overrides[count].board = BOARD_DTC3181E;
316 count++;
317 }
318 }
Ondrej Zary702a98c2010-08-10 18:01:16 -0700319#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700320 tpnt->proc_name = "g_NCR5380";
321
322 for (count = 0; current_override < NO_OVERRIDES; ++current_override) {
323 if (!(overrides[current_override].NCR5380_map_name))
324 continue;
325
326 ports = NULL;
327 switch (overrides[current_override].board) {
328 case BOARD_NCR5380:
329 flags = FLAG_NO_PSEUDO_DMA;
330 break;
331 case BOARD_NCR53C400:
332 flags = FLAG_NCR53C400;
333 break;
334 case BOARD_NCR53C400A:
335 flags = FLAG_NO_PSEUDO_DMA;
336 ports = ncr_53c400a_ports;
337 break;
338 case BOARD_DTC3181E:
339 flags = FLAG_NO_PSEUDO_DMA | FLAG_DTC3181E;
340 ports = dtc_3181e_ports;
341 break;
342 }
343
Ondrej Zary702a98c2010-08-10 18:01:16 -0700344#ifndef SCSI_G_NCR5380_MEM
Linus Torvalds1da177e2005-04-16 15:20:36 -0700345 if (ports) {
346 /* wakeup sequence for the NCR53C400A and DTC3181E */
347
348 /* Disable the adapter and look for a free io port */
349 outb(0x59, 0x779);
350 outb(0xb9, 0x379);
351 outb(0xc5, 0x379);
352 outb(0xae, 0x379);
353 outb(0xa6, 0x379);
354 outb(0x00, 0x379);
355
356 if (overrides[current_override].NCR5380_map_name != PORT_AUTO)
357 for (i = 0; ports[i]; i++) {
358 if (!request_region(ports[i], 16, "ncr53c80"))
359 continue;
360 if (overrides[current_override].NCR5380_map_name == ports[i])
361 break;
362 release_region(ports[i], 16);
363 } else
364 for (i = 0; ports[i]; i++) {
365 if (!request_region(ports[i], 16, "ncr53c80"))
366 continue;
367 if (inb(ports[i]) == 0xff)
368 break;
369 release_region(ports[i], 16);
370 }
371 if (ports[i]) {
372 /* At this point we have our region reserved */
373 outb(0x59, 0x779);
374 outb(0xb9, 0x379);
375 outb(0xc5, 0x379);
376 outb(0xae, 0x379);
377 outb(0xa6, 0x379);
378 outb(0x80 | i, 0x379); /* set io port to be used */
379 outb(0xc0, ports[i] + 9);
380 if (inb(ports[i] + 9) != 0x80)
381 continue;
382 else
383 overrides[current_override].NCR5380_map_name = ports[i];
384 } else
385 continue;
386 }
387 else
388 {
389 /* Not a 53C400A style setup - just grab */
390 if(!(request_region(overrides[current_override].NCR5380_map_name, NCR5380_region_size, "ncr5380")))
391 continue;
392 region_size = NCR5380_region_size;
393 }
394#else
Al Viroc818cb62006-03-24 03:15:37 -0800395 base = overrides[current_override].NCR5380_map_name;
396 if (!request_mem_region(base, NCR5380_region_size, "ncr5380"))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700397 continue;
Al Viroc818cb62006-03-24 03:15:37 -0800398 iomem = ioremap(base, NCR5380_region_size);
399 if (!iomem) {
400 release_mem_region(base, NCR5380_region_size);
401 continue;
402 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700403#endif
404 instance = scsi_register(tpnt, sizeof(struct NCR5380_hostdata));
405 if (instance == NULL) {
Ondrej Zary702a98c2010-08-10 18:01:16 -0700406#ifndef SCSI_G_NCR5380_MEM
Linus Torvalds1da177e2005-04-16 15:20:36 -0700407 release_region(overrides[current_override].NCR5380_map_name, region_size);
408#else
Al Viroc818cb62006-03-24 03:15:37 -0800409 iounmap(iomem);
410 release_mem_region(base, NCR5380_region_size);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700411#endif
412 continue;
413 }
414
415 instance->NCR5380_instance_name = overrides[current_override].NCR5380_map_name;
Ondrej Zary702a98c2010-08-10 18:01:16 -0700416#ifndef SCSI_G_NCR5380_MEM
Linus Torvalds1da177e2005-04-16 15:20:36 -0700417 instance->n_io_port = region_size;
Al Viroc818cb62006-03-24 03:15:37 -0800418#else
Ondrej Zary702a98c2010-08-10 18:01:16 -0700419 ((struct NCR5380_hostdata *)instance->hostdata)->iomem = iomem;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700420#endif
421
422 NCR5380_init(instance, flags);
423
424 if (overrides[current_override].irq != IRQ_AUTO)
425 instance->irq = overrides[current_override].irq;
426 else
427 instance->irq = NCR5380_probe_irq(instance, 0xffff);
428
Finn Thain22f5f102014-11-12 16:11:56 +1100429 /* Compatibility with documented NCR5380 kernel parameters */
430 if (instance->irq == 255)
431 instance->irq = NO_IRQ;
432
433 if (instance->irq != NO_IRQ)
Jeff Garzik1e641662007-11-11 19:52:05 -0500434 if (request_irq(instance->irq, generic_NCR5380_intr,
Michael Opdenacker4909cc22014-03-05 06:09:41 +0100435 0, "NCR5380", instance)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700436 printk(KERN_WARNING "scsi%d : IRQ%d not free, interrupts disabled\n", instance->host_no, instance->irq);
Finn Thain22f5f102014-11-12 16:11:56 +1100437 instance->irq = NO_IRQ;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700438 }
439
Finn Thain22f5f102014-11-12 16:11:56 +1100440 if (instance->irq == NO_IRQ) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700441 printk(KERN_INFO "scsi%d : interrupts not enabled. for better interactive performance,\n", instance->host_no);
442 printk(KERN_INFO "scsi%d : please jumper the board for a free IRQ.\n", instance->host_no);
443 }
444
Linus Torvalds1da177e2005-04-16 15:20:36 -0700445 ++current_override;
446 ++count;
447 }
448 return count;
449}
450
451/**
Linus Torvalds1da177e2005-04-16 15:20:36 -0700452 * generic_NCR5380_release_resources - free resources
453 * @instance: host adapter to clean up
454 *
455 * Free the generic interface resources from this adapter.
456 *
457 * Locks: none
458 */
459
Finn Thained8b9e72014-11-12 16:11:51 +1100460static int generic_NCR5380_release_resources(struct Scsi_Host *instance)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700461{
462 NCR5380_local_declare();
463 NCR5380_setup(instance);
464
Finn Thain22f5f102014-11-12 16:11:56 +1100465 if (instance->irq != NO_IRQ)
Jeff Garzik1e641662007-11-11 19:52:05 -0500466 free_irq(instance->irq, instance);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700467 NCR5380_exit(instance);
468
Ondrej Zary702a98c2010-08-10 18:01:16 -0700469#ifndef SCSI_G_NCR5380_MEM
Linus Torvalds1da177e2005-04-16 15:20:36 -0700470 release_region(instance->NCR5380_instance_name, instance->n_io_port);
471#else
Ondrej Zary702a98c2010-08-10 18:01:16 -0700472 iounmap(((struct NCR5380_hostdata *)instance->hostdata)->iomem);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700473 release_mem_region(instance->NCR5380_instance_name, NCR5380_region_size);
474#endif
475
476
477 return 0;
478}
479
480#ifdef BIOSPARAM
481/**
482 * generic_NCR5380_biosparam
483 * @disk: disk to compute geometry for
484 * @dev: device identifier for this disk
485 * @ip: sizes to fill in
486 *
487 * Generates a BIOS / DOS compatible H-C-S mapping for the specified
488 * device / size.
489 *
490 * XXX Most SCSI boards use this mapping, I could be incorrect. Someone
491 * using hard disks on a trantor should verify that this mapping
492 * corresponds to that used by the BIOS / ASPI driver by running the linux
493 * fdisk program and matching the H_C_S coordinates to what DOS uses.
494 *
495 * Locks: none
496 */
497
498static int
499generic_NCR5380_biosparam(struct scsi_device *sdev, struct block_device *bdev,
500 sector_t capacity, int *ip)
501{
502 ip[0] = 64;
503 ip[1] = 32;
504 ip[2] = capacity >> 11;
505 return 0;
506}
507#endif
508
Gabriel C8d9e0f42007-08-10 14:50:39 -0700509#ifdef NCR53C400_PSEUDO_DMA
Linus Torvalds1da177e2005-04-16 15:20:36 -0700510
511/**
512 * NCR5380_pread - pseudo DMA read
513 * @instance: adapter to read from
514 * @dst: buffer to read into
515 * @len: buffer length
516 *
Lucas De Marchi25985ed2011-03-30 22:57:33 -0300517 * Perform a pseudo DMA mode read from an NCR53C400 or equivalent
Linus Torvalds1da177e2005-04-16 15:20:36 -0700518 * controller
519 */
520
521static inline int NCR5380_pread(struct Scsi_Host *instance, unsigned char *dst, int len)
522{
523 int blocks = len / 128;
524 int start = 0;
525 int bl;
526
527 NCR5380_local_declare();
528 NCR5380_setup(instance);
529
530 NCR5380_write(C400_CONTROL_STATUS_REG, CSR_BASE | CSR_TRANS_DIR);
531 NCR5380_write(C400_BLOCK_COUNTER_REG, blocks);
532 while (1) {
533 if ((bl = NCR5380_read(C400_BLOCK_COUNTER_REG)) == 0) {
534 break;
535 }
536 if (NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_GATED_53C80_IRQ) {
537 printk(KERN_ERR "53C400r: Got 53C80_IRQ start=%d, blocks=%d\n", start, blocks);
538 return -1;
539 }
540 while (NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_HOST_BUF_NOT_RDY);
541
Ondrej Zary702a98c2010-08-10 18:01:16 -0700542#ifndef SCSI_G_NCR5380_MEM
Linus Torvalds1da177e2005-04-16 15:20:36 -0700543 {
544 int i;
545 for (i = 0; i < 128; i++)
546 dst[start + i] = NCR5380_read(C400_HOST_BUFFER);
547 }
548#else
Ondrej Zary702a98c2010-08-10 18:01:16 -0700549 /* implies SCSI_G_NCR5380_MEM */
Al Viroc818cb62006-03-24 03:15:37 -0800550 memcpy_fromio(dst + start, iomem + NCR53C400_host_buffer, 128);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700551#endif
552 start += 128;
553 blocks--;
554 }
555
556 if (blocks) {
557 while (NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_HOST_BUF_NOT_RDY)
558 {
559 // FIXME - no timeout
560 }
561
Ondrej Zary702a98c2010-08-10 18:01:16 -0700562#ifndef SCSI_G_NCR5380_MEM
Linus Torvalds1da177e2005-04-16 15:20:36 -0700563 {
564 int i;
565 for (i = 0; i < 128; i++)
566 dst[start + i] = NCR5380_read(C400_HOST_BUFFER);
567 }
568#else
Ondrej Zary702a98c2010-08-10 18:01:16 -0700569 /* implies SCSI_G_NCR5380_MEM */
Al Viroc818cb62006-03-24 03:15:37 -0800570 memcpy_fromio(dst + start, iomem + NCR53C400_host_buffer, 128);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700571#endif
572 start += 128;
573 blocks--;
574 }
575
576 if (!(NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_GATED_53C80_IRQ))
577 printk("53C400r: no 53C80 gated irq after transfer");
578
579#if 0
580 /*
581 * DON'T DO THIS - THEY NEVER ARRIVE!
582 */
583 printk("53C400r: Waiting for 53C80 registers\n");
584 while (NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_53C80_REG)
585 ;
586#endif
587 if (!(NCR5380_read(BUS_AND_STATUS_REG) & BASR_END_DMA_TRANSFER))
588 printk(KERN_ERR "53C400r: no end dma signal\n");
589
590 NCR5380_write(MODE_REG, MR_BASE);
591 NCR5380_read(RESET_PARITY_INTERRUPT_REG);
592 return 0;
593}
594
595/**
596 * NCR5380_write - pseudo DMA write
597 * @instance: adapter to read from
598 * @dst: buffer to read into
599 * @len: buffer length
600 *
Lucas De Marchi25985ed2011-03-30 22:57:33 -0300601 * Perform a pseudo DMA mode read from an NCR53C400 or equivalent
Linus Torvalds1da177e2005-04-16 15:20:36 -0700602 * controller
603 */
604
605static inline int NCR5380_pwrite(struct Scsi_Host *instance, unsigned char *src, int len)
606{
607 int blocks = len / 128;
608 int start = 0;
609 int bl;
610 int i;
611
612 NCR5380_local_declare();
613 NCR5380_setup(instance);
614
615 NCR5380_write(C400_CONTROL_STATUS_REG, CSR_BASE);
616 NCR5380_write(C400_BLOCK_COUNTER_REG, blocks);
617 while (1) {
618 if (NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_GATED_53C80_IRQ) {
619 printk(KERN_ERR "53C400w: Got 53C80_IRQ start=%d, blocks=%d\n", start, blocks);
620 return -1;
621 }
622
623 if ((bl = NCR5380_read(C400_BLOCK_COUNTER_REG)) == 0) {
624 break;
625 }
626 while (NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_HOST_BUF_NOT_RDY)
627 ; // FIXME - timeout
Ondrej Zary702a98c2010-08-10 18:01:16 -0700628#ifndef SCSI_G_NCR5380_MEM
Linus Torvalds1da177e2005-04-16 15:20:36 -0700629 {
630 for (i = 0; i < 128; i++)
631 NCR5380_write(C400_HOST_BUFFER, src[start + i]);
632 }
633#else
Ondrej Zary702a98c2010-08-10 18:01:16 -0700634 /* implies SCSI_G_NCR5380_MEM */
Al Viroc818cb62006-03-24 03:15:37 -0800635 memcpy_toio(iomem + NCR53C400_host_buffer, src + start, 128);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700636#endif
637 start += 128;
638 blocks--;
639 }
640 if (blocks) {
641 while (NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_HOST_BUF_NOT_RDY)
642 ; // FIXME - no timeout
643
Ondrej Zary702a98c2010-08-10 18:01:16 -0700644#ifndef SCSI_G_NCR5380_MEM
Linus Torvalds1da177e2005-04-16 15:20:36 -0700645 {
646 for (i = 0; i < 128; i++)
647 NCR5380_write(C400_HOST_BUFFER, src[start + i]);
648 }
649#else
Ondrej Zary702a98c2010-08-10 18:01:16 -0700650 /* implies SCSI_G_NCR5380_MEM */
Al Viroc818cb62006-03-24 03:15:37 -0800651 memcpy_toio(iomem + NCR53C400_host_buffer, src + start, 128);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700652#endif
653 start += 128;
654 blocks--;
655 }
656
657#if 0
658 printk("53C400w: waiting for registers to be available\n");
659 THEY NEVER DO ! while (NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_53C80_REG);
660 printk("53C400w: Got em\n");
661#endif
662
663 /* Let's wait for this instead - could be ugly */
664 /* All documentation says to check for this. Maybe my hardware is too
665 * fast. Waiting for it seems to work fine! KLL
666 */
667 while (!(i = NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_GATED_53C80_IRQ))
668 ; // FIXME - no timeout
669
670 /*
671 * I know. i is certainly != 0 here but the loop is new. See previous
672 * comment.
673 */
674 if (i) {
675 if (!((i = NCR5380_read(BUS_AND_STATUS_REG)) & BASR_END_DMA_TRANSFER))
676 printk(KERN_ERR "53C400w: No END OF DMA bit - WHOOPS! BASR=%0x\n", i);
677 } else
678 printk(KERN_ERR "53C400w: no 53C80 gated irq after transfer (last block)\n");
679
680#if 0
681 if (!(NCR5380_read(BUS_AND_STATUS_REG) & BASR_END_DMA_TRANSFER)) {
682 printk(KERN_ERR "53C400w: no end dma signal\n");
683 }
684#endif
685 while (!(NCR5380_read(TARGET_COMMAND_REG) & TCR_LAST_BYTE_SENT))
686 ; // TIMEOUT
687 return 0;
688}
689#endif /* PSEUDO_DMA */
690
691/*
692 * Include the NCR5380 core code that we build our driver around
693 */
694
695#include "NCR5380.c"
696
Christoph Hellwigd0be4a7d2005-10-31 18:31:40 +0100697static struct scsi_host_template driver_template = {
Al Virodd7ab712013-03-31 01:15:54 -0400698 .show_info = generic_NCR5380_show_info,
Finn Thain8c325132014-11-12 16:11:58 +1100699 .name = "Generic NCR5380/NCR53C400 SCSI",
Linus Torvalds1da177e2005-04-16 15:20:36 -0700700 .detect = generic_NCR5380_detect,
701 .release = generic_NCR5380_release_resources,
702 .info = generic_NCR5380_info,
703 .queuecommand = generic_NCR5380_queue_command,
704 .eh_abort_handler = generic_NCR5380_abort,
705 .eh_bus_reset_handler = generic_NCR5380_bus_reset,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700706 .bios_param = NCR5380_BIOSPARAM,
707 .can_queue = CAN_QUEUE,
708 .this_id = 7,
709 .sg_tablesize = SG_ALL,
710 .cmd_per_lun = CMD_PER_LUN,
711 .use_clustering = DISABLE_CLUSTERING,
712};
713#include <linux/module.h>
714#include "scsi_module.c"
715
716module_param(ncr_irq, int, 0);
717module_param(ncr_dma, int, 0);
718module_param(ncr_addr, int, 0);
719module_param(ncr_5380, int, 0);
720module_param(ncr_53c400, int, 0);
721module_param(ncr_53c400a, int, 0);
722module_param(dtc_3181e, int, 0);
723MODULE_LICENSE("GPL");
724
Geert Uytterhoevenb026e8e2015-01-03 23:00:16 +0100725#if !defined(SCSI_G_NCR5380_MEM) && defined(MODULE)
Greg Kroah-Hartman6f039792012-12-21 13:08:55 -0800726static struct isapnp_device_id id_table[] = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700727 {
728 ISAPNP_ANY_ID, ISAPNP_ANY_ID,
729 ISAPNP_VENDOR('D', 'T', 'C'), ISAPNP_FUNCTION(0x436e),
730 0},
731 {0}
732};
733
734MODULE_DEVICE_TABLE(isapnp, id_table);
Ondrej Zary702a98c2010-08-10 18:01:16 -0700735#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700736
737__setup("ncr5380=", do_NCR5380_setup);
738__setup("ncr53c400=", do_NCR53C400_setup);
739__setup("ncr53c400a=", do_NCR53C400A_setup);
740__setup("dtc3181e=", do_DTC3181E_setup);