V4L/DVB (3769): Fix a type error in dvb_frontend.c
[linux-2.6] / drivers / scsi / scsi_transport_spi.c
CommitLineData
1da177e4
LT
1/*
2 * Parallel SCSI (SPI) transport specific attributes exported to sysfs.
3 *
4 * Copyright (c) 2003 Silicon Graphics, Inc. All rights reserved.
5 * Copyright (c) 2004, 2005 James Bottomley <James.Bottomley@SteelEye.com>
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20 */
410ca5c7 21#include <linux/config.h>
1da177e4
LT
22#include <linux/ctype.h>
23#include <linux/init.h>
24#include <linux/module.h>
25#include <linux/workqueue.h>
949bf797 26#include <linux/blkdev.h>
d158d261 27#include <linux/mutex.h>
1da177e4
LT
28#include <scsi/scsi.h>
29#include "scsi_priv.h"
30#include <scsi/scsi_device.h>
31#include <scsi/scsi_host.h>
33aa687d 32#include <scsi/scsi_cmnd.h>
1da177e4
LT
33#include <scsi/scsi_eh.h>
34#include <scsi/scsi_transport.h>
35#include <scsi/scsi_transport_spi.h>
36
d872ebe4 37#define SPI_NUM_ATTRS 14 /* increase this if you add attributes */
1da177e4
LT
38#define SPI_OTHER_ATTRS 1 /* Increase this if you add "always
39 * on" attributes */
40#define SPI_HOST_ATTRS 1
41
42#define SPI_MAX_ECHO_BUFFER_SIZE 4096
43
949bf797
JB
44#define DV_LOOPS 3
45#define DV_TIMEOUT (10*HZ)
46#define DV_RETRIES 3 /* should only need at most
47 * two cc/ua clears */
48
1da177e4
LT
49/* Private data accessors (keep these out of the header file) */
50#define spi_dv_pending(x) (((struct spi_transport_attrs *)&(x)->starget_data)->dv_pending)
d158d261 51#define spi_dv_mutex(x) (((struct spi_transport_attrs *)&(x)->starget_data)->dv_mutex)
1da177e4
LT
52
53struct spi_internal {
54 struct scsi_transport_template t;
55 struct spi_function_template *f;
56 /* The actual attributes */
57 struct class_device_attribute private_attrs[SPI_NUM_ATTRS];
58 /* The array of null terminated pointers to attributes
59 * needed by scsi_sysfs.c */
60 struct class_device_attribute *attrs[SPI_NUM_ATTRS + SPI_OTHER_ATTRS + 1];
61 struct class_device_attribute private_host_attrs[SPI_HOST_ATTRS];
62 struct class_device_attribute *host_attrs[SPI_HOST_ATTRS + 1];
63};
64
65#define to_spi_internal(tmpl) container_of(tmpl, struct spi_internal, t)
66
67static const int ppr_to_ps[] = {
68 /* The PPR values 0-6 are reserved, fill them in when
69 * the committee defines them */
70 -1, /* 0x00 */
71 -1, /* 0x01 */
72 -1, /* 0x02 */
73 -1, /* 0x03 */
74 -1, /* 0x04 */
75 -1, /* 0x05 */
76 -1, /* 0x06 */
77 3125, /* 0x07 */
78 6250, /* 0x08 */
79 12500, /* 0x09 */
80 25000, /* 0x0a */
81 30300, /* 0x0b */
82 50000, /* 0x0c */
83};
84/* The PPR values at which you calculate the period in ns by multiplying
85 * by 4 */
86#define SPI_STATIC_PPR 0x0c
87
88static int sprint_frac(char *dest, int value, int denom)
89{
90 int frac = value % denom;
91 int result = sprintf(dest, "%d", value / denom);
92
93 if (frac == 0)
94 return result;
95 dest[result++] = '.';
96
97 do {
98 denom /= 10;
99 sprintf(dest + result, "%d", frac / denom);
100 result++;
101 frac %= denom;
102 } while (frac);
103
104 dest[result++] = '\0';
105 return result;
106}
107
33aa687d
JB
108static int spi_execute(struct scsi_device *sdev, const void *cmd,
109 enum dma_data_direction dir,
110 void *buffer, unsigned bufflen,
111 struct scsi_sense_hdr *sshdr)
949bf797 112{
33aa687d
JB
113 int i, result;
114 unsigned char sense[SCSI_SENSE_BUFFERSIZE];
949bf797
JB
115
116 for(i = 0; i < DV_RETRIES; i++) {
33aa687d
JB
117 result = scsi_execute(sdev, cmd, dir, buffer, bufflen,
118 sense, DV_TIMEOUT, /* retries */ 1,
119 REQ_FAILFAST);
120 if (result & DRIVER_SENSE) {
121 struct scsi_sense_hdr sshdr_tmp;
122 if (!sshdr)
123 sshdr = &sshdr_tmp;
124
125 if (scsi_normalize_sense(sense, sizeof(*sense),
126 sshdr)
127 && sshdr->sense_key == UNIT_ATTENTION)
949bf797
JB
128 continue;
129 }
130 break;
131 }
33aa687d 132 return result;
949bf797
JB
133}
134
1da177e4
LT
135static struct {
136 enum spi_signal_type value;
137 char *name;
138} signal_types[] = {
139 { SPI_SIGNAL_UNKNOWN, "unknown" },
140 { SPI_SIGNAL_SE, "SE" },
141 { SPI_SIGNAL_LVD, "LVD" },
142 { SPI_SIGNAL_HVD, "HVD" },
143};
144
145static inline const char *spi_signal_to_string(enum spi_signal_type type)
146{
147 int i;
148
6391a113 149 for (i = 0; i < ARRAY_SIZE(signal_types); i++) {
1da177e4
LT
150 if (type == signal_types[i].value)
151 return signal_types[i].name;
152 }
153 return NULL;
154}
155static inline enum spi_signal_type spi_signal_to_value(const char *name)
156{
157 int i, len;
158
6391a113 159 for (i = 0; i < ARRAY_SIZE(signal_types); i++) {
1da177e4
LT
160 len = strlen(signal_types[i].name);
161 if (strncmp(name, signal_types[i].name, len) == 0 &&
162 (name[len] == '\n' || name[len] == '\0'))
163 return signal_types[i].value;
164 }
165 return SPI_SIGNAL_UNKNOWN;
166}
167
d0a7e574
JB
168static int spi_host_setup(struct transport_container *tc, struct device *dev,
169 struct class_device *cdev)
1da177e4
LT
170{
171 struct Scsi_Host *shost = dev_to_shost(dev);
172
173 spi_signalling(shost) = SPI_SIGNAL_UNKNOWN;
174
175 return 0;
176}
177
178static DECLARE_TRANSPORT_CLASS(spi_host_class,
179 "spi_host",
180 spi_host_setup,
181 NULL,
182 NULL);
183
184static int spi_host_match(struct attribute_container *cont,
185 struct device *dev)
186{
187 struct Scsi_Host *shost;
188 struct spi_internal *i;
189
190 if (!scsi_is_host_device(dev))
191 return 0;
192
193 shost = dev_to_shost(dev);
194 if (!shost->transportt || shost->transportt->host_attrs.ac.class
195 != &spi_host_class.class)
196 return 0;
197
198 i = to_spi_internal(shost->transportt);
199
200 return &i->t.host_attrs.ac == cont;
201}
202
d0a7e574
JB
203static int spi_device_configure(struct transport_container *tc,
204 struct device *dev,
205 struct class_device *cdev)
1da177e4
LT
206{
207 struct scsi_device *sdev = to_scsi_device(dev);
208 struct scsi_target *starget = sdev->sdev_target;
209
210 /* Populate the target capability fields with the values
211 * gleaned from the device inquiry */
212
213 spi_support_sync(starget) = scsi_device_sync(sdev);
214 spi_support_wide(starget) = scsi_device_wide(sdev);
215 spi_support_dt(starget) = scsi_device_dt(sdev);
216 spi_support_dt_only(starget) = scsi_device_dt_only(sdev);
217 spi_support_ius(starget) = scsi_device_ius(sdev);
218 spi_support_qas(starget) = scsi_device_qas(sdev);
219
220 return 0;
221}
222
d0a7e574
JB
223static int spi_setup_transport_attrs(struct transport_container *tc,
224 struct device *dev,
225 struct class_device *cdev)
1da177e4
LT
226{
227 struct scsi_target *starget = to_scsi_target(dev);
228
229 spi_period(starget) = -1; /* illegal value */
62a86129 230 spi_min_period(starget) = 0;
1da177e4 231 spi_offset(starget) = 0; /* async */
62a86129 232 spi_max_offset(starget) = 255;
1da177e4 233 spi_width(starget) = 0; /* narrow */
62a86129 234 spi_max_width(starget) = 1;
1da177e4
LT
235 spi_iu(starget) = 0; /* no IU */
236 spi_dt(starget) = 0; /* ST */
237 spi_qas(starget) = 0;
238 spi_wr_flow(starget) = 0;
239 spi_rd_strm(starget) = 0;
240 spi_rti(starget) = 0;
241 spi_pcomp_en(starget) = 0;
d872ebe4 242 spi_hold_mcs(starget) = 0;
1da177e4
LT
243 spi_dv_pending(starget) = 0;
244 spi_initial_dv(starget) = 0;
d158d261 245 mutex_init(&spi_dv_mutex(starget));
1da177e4
LT
246
247 return 0;
248}
249
62a86129
JB
250#define spi_transport_show_simple(field, format_string) \
251 \
252static ssize_t \
253show_spi_transport_##field(struct class_device *cdev, char *buf) \
254{ \
255 struct scsi_target *starget = transport_class_to_starget(cdev); \
256 struct spi_transport_attrs *tp; \
257 \
258 tp = (struct spi_transport_attrs *)&starget->starget_data; \
259 return snprintf(buf, 20, format_string, tp->field); \
260}
261
262#define spi_transport_store_simple(field, format_string) \
263 \
264static ssize_t \
265store_spi_transport_##field(struct class_device *cdev, const char *buf, \
266 size_t count) \
267{ \
268 int val; \
269 struct scsi_target *starget = transport_class_to_starget(cdev); \
270 struct spi_transport_attrs *tp; \
271 \
272 tp = (struct spi_transport_attrs *)&starget->starget_data; \
273 val = simple_strtoul(buf, NULL, 0); \
274 tp->field = val; \
275 return count; \
276}
277
1da177e4
LT
278#define spi_transport_show_function(field, format_string) \
279 \
280static ssize_t \
281show_spi_transport_##field(struct class_device *cdev, char *buf) \
282{ \
283 struct scsi_target *starget = transport_class_to_starget(cdev); \
284 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); \
285 struct spi_transport_attrs *tp; \
286 struct spi_internal *i = to_spi_internal(shost->transportt); \
287 tp = (struct spi_transport_attrs *)&starget->starget_data; \
288 if (i->f->get_##field) \
289 i->f->get_##field(starget); \
290 return snprintf(buf, 20, format_string, tp->field); \
291}
292
293#define spi_transport_store_function(field, format_string) \
294static ssize_t \
295store_spi_transport_##field(struct class_device *cdev, const char *buf, \
296 size_t count) \
297{ \
298 int val; \
299 struct scsi_target *starget = transport_class_to_starget(cdev); \
300 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); \
301 struct spi_internal *i = to_spi_internal(shost->transportt); \
302 \
303 val = simple_strtoul(buf, NULL, 0); \
62a86129
JB
304 i->f->set_##field(starget, val); \
305 return count; \
306}
307
308#define spi_transport_store_max(field, format_string) \
309static ssize_t \
310store_spi_transport_##field(struct class_device *cdev, const char *buf, \
311 size_t count) \
312{ \
313 int val; \
314 struct scsi_target *starget = transport_class_to_starget(cdev); \
315 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); \
316 struct spi_internal *i = to_spi_internal(shost->transportt); \
317 struct spi_transport_attrs *tp \
318 = (struct spi_transport_attrs *)&starget->starget_data; \
319 \
320 val = simple_strtoul(buf, NULL, 0); \
321 if (val > tp->max_##field) \
322 val = tp->max_##field; \
1da177e4
LT
323 i->f->set_##field(starget, val); \
324 return count; \
325}
326
327#define spi_transport_rd_attr(field, format_string) \
328 spi_transport_show_function(field, format_string) \
329 spi_transport_store_function(field, format_string) \
330static CLASS_DEVICE_ATTR(field, S_IRUGO | S_IWUSR, \
331 show_spi_transport_##field, \
332 store_spi_transport_##field);
333
62a86129
JB
334#define spi_transport_simple_attr(field, format_string) \
335 spi_transport_show_simple(field, format_string) \
336 spi_transport_store_simple(field, format_string) \
337static CLASS_DEVICE_ATTR(field, S_IRUGO | S_IWUSR, \
338 show_spi_transport_##field, \
339 store_spi_transport_##field);
340
341#define spi_transport_max_attr(field, format_string) \
342 spi_transport_show_function(field, format_string) \
343 spi_transport_store_max(field, format_string) \
344 spi_transport_simple_attr(max_##field, format_string) \
345static CLASS_DEVICE_ATTR(field, S_IRUGO | S_IWUSR, \
346 show_spi_transport_##field, \
347 store_spi_transport_##field);
348
1da177e4 349/* The Parallel SCSI Tranport Attributes: */
62a86129
JB
350spi_transport_max_attr(offset, "%d\n");
351spi_transport_max_attr(width, "%d\n");
1da177e4
LT
352spi_transport_rd_attr(iu, "%d\n");
353spi_transport_rd_attr(dt, "%d\n");
354spi_transport_rd_attr(qas, "%d\n");
355spi_transport_rd_attr(wr_flow, "%d\n");
356spi_transport_rd_attr(rd_strm, "%d\n");
357spi_transport_rd_attr(rti, "%d\n");
358spi_transport_rd_attr(pcomp_en, "%d\n");
d872ebe4 359spi_transport_rd_attr(hold_mcs, "%d\n");
1da177e4 360
9a881f16 361/* we only care about the first child device so we return 1 */
362static int child_iter(struct device *dev, void *data)
363{
364 struct scsi_device *sdev = to_scsi_device(dev);
365
366 spi_dv_device(sdev);
367 return 1;
368}
369
1da177e4
LT
370static ssize_t
371store_spi_revalidate(struct class_device *cdev, const char *buf, size_t count)
372{
373 struct scsi_target *starget = transport_class_to_starget(cdev);
374
9a881f16 375 device_for_each_child(&starget->dev, NULL, child_iter);
1da177e4
LT
376 return count;
377}
378static CLASS_DEVICE_ATTR(revalidate, S_IWUSR, NULL, store_spi_revalidate);
379
380/* Translate the period into ns according to the current spec
381 * for SDTR/PPR messages */
ef72582e 382static int period_to_str(char *buf, int period)
1da177e4 383{
1da177e4 384 int len, picosec;
1da177e4 385
62a86129 386 if (period < 0 || period > 0xff) {
1da177e4 387 picosec = -1;
62a86129
JB
388 } else if (period <= SPI_STATIC_PPR) {
389 picosec = ppr_to_ps[period];
1da177e4 390 } else {
62a86129 391 picosec = period * 4000;
1da177e4
LT
392 }
393
394 if (picosec == -1) {
395 len = sprintf(buf, "reserved");
396 } else {
397 len = sprint_frac(buf, picosec, 1000);
398 }
399
ef72582e
MW
400 return len;
401}
402
403static ssize_t
ea697e45 404show_spi_transport_period_helper(char *buf, int period)
ef72582e
MW
405{
406 int len = period_to_str(buf, period);
1da177e4
LT
407 buf[len++] = '\n';
408 buf[len] = '\0';
409 return len;
410}
411
412static ssize_t
62a86129
JB
413store_spi_transport_period_helper(struct class_device *cdev, const char *buf,
414 size_t count, int *periodp)
1da177e4 415{
1da177e4
LT
416 int j, picosec, period = -1;
417 char *endp;
418
419 picosec = simple_strtoul(buf, &endp, 10) * 1000;
420 if (*endp == '.') {
421 int mult = 100;
422 do {
423 endp++;
424 if (!isdigit(*endp))
425 break;
426 picosec += (*endp - '0') * mult;
427 mult /= 10;
428 } while (mult > 0);
429 }
430
431 for (j = 0; j <= SPI_STATIC_PPR; j++) {
432 if (ppr_to_ps[j] < picosec)
433 continue;
434 period = j;
435 break;
436 }
437
438 if (period == -1)
439 period = picosec / 4000;
440
441 if (period > 0xff)
442 period = 0xff;
443
62a86129 444 *periodp = period;
1da177e4
LT
445
446 return count;
447}
448
62a86129
JB
449static ssize_t
450show_spi_transport_period(struct class_device *cdev, char *buf)
451{
452 struct scsi_target *starget = transport_class_to_starget(cdev);
453 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
454 struct spi_internal *i = to_spi_internal(shost->transportt);
455 struct spi_transport_attrs *tp =
456 (struct spi_transport_attrs *)&starget->starget_data;
457
458 if (i->f->get_period)
459 i->f->get_period(starget);
460
ea697e45 461 return show_spi_transport_period_helper(buf, tp->period);
62a86129
JB
462}
463
464static ssize_t
465store_spi_transport_period(struct class_device *cdev, const char *buf,
466 size_t count)
467{
468 struct scsi_target *starget = transport_class_to_starget(cdev);
469 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
470 struct spi_internal *i = to_spi_internal(shost->transportt);
471 struct spi_transport_attrs *tp =
472 (struct spi_transport_attrs *)&starget->starget_data;
473 int period, retval;
474
475 retval = store_spi_transport_period_helper(cdev, buf, count, &period);
476
477 if (period < tp->min_period)
478 period = tp->min_period;
479
480 i->f->set_period(starget, period);
481
482 return retval;
483}
484
1da177e4
LT
485static CLASS_DEVICE_ATTR(period, S_IRUGO | S_IWUSR,
486 show_spi_transport_period,
487 store_spi_transport_period);
488
62a86129
JB
489static ssize_t
490show_spi_transport_min_period(struct class_device *cdev, char *buf)
491{
492 struct scsi_target *starget = transport_class_to_starget(cdev);
493 struct spi_transport_attrs *tp =
494 (struct spi_transport_attrs *)&starget->starget_data;
495
ea697e45 496 return show_spi_transport_period_helper(buf, tp->min_period);
62a86129
JB
497}
498
499static ssize_t
500store_spi_transport_min_period(struct class_device *cdev, const char *buf,
501 size_t count)
502{
503 struct scsi_target *starget = transport_class_to_starget(cdev);
504 struct spi_transport_attrs *tp =
505 (struct spi_transport_attrs *)&starget->starget_data;
506
507 return store_spi_transport_period_helper(cdev, buf, count,
508 &tp->min_period);
509}
510
511
512static CLASS_DEVICE_ATTR(min_period, S_IRUGO | S_IWUSR,
513 show_spi_transport_min_period,
514 store_spi_transport_min_period);
515
516
1da177e4
LT
517static ssize_t show_spi_host_signalling(struct class_device *cdev, char *buf)
518{
519 struct Scsi_Host *shost = transport_class_to_shost(cdev);
520 struct spi_internal *i = to_spi_internal(shost->transportt);
521
522 if (i->f->get_signalling)
523 i->f->get_signalling(shost);
524
525 return sprintf(buf, "%s\n", spi_signal_to_string(spi_signalling(shost)));
526}
527static ssize_t store_spi_host_signalling(struct class_device *cdev,
528 const char *buf, size_t count)
529{
530 struct Scsi_Host *shost = transport_class_to_shost(cdev);
531 struct spi_internal *i = to_spi_internal(shost->transportt);
532 enum spi_signal_type type = spi_signal_to_value(buf);
533
534 if (type != SPI_SIGNAL_UNKNOWN)
535 i->f->set_signalling(shost, type);
536
537 return count;
538}
539static CLASS_DEVICE_ATTR(signalling, S_IRUGO | S_IWUSR,
540 show_spi_host_signalling,
541 store_spi_host_signalling);
542
543#define DV_SET(x, y) \
544 if(i->f->set_##x) \
545 i->f->set_##x(sdev->sdev_target, y)
546
1da177e4
LT
547enum spi_compare_returns {
548 SPI_COMPARE_SUCCESS,
549 SPI_COMPARE_FAILURE,
550 SPI_COMPARE_SKIP_TEST,
551};
552
553
554/* This is for read/write Domain Validation: If the device supports
555 * an echo buffer, we do read/write tests to it */
556static enum spi_compare_returns
33aa687d 557spi_dv_device_echo_buffer(struct scsi_device *sdev, u8 *buffer,
1da177e4
LT
558 u8 *ptr, const int retries)
559{
1da177e4 560 int len = ptr - buffer;
33aa687d 561 int j, k, r, result;
1da177e4 562 unsigned int pattern = 0x0000ffff;
33aa687d 563 struct scsi_sense_hdr sshdr;
1da177e4
LT
564
565 const char spi_write_buffer[] = {
566 WRITE_BUFFER, 0x0a, 0, 0, 0, 0, 0, len >> 8, len & 0xff, 0
567 };
568 const char spi_read_buffer[] = {
569 READ_BUFFER, 0x0a, 0, 0, 0, 0, 0, len >> 8, len & 0xff, 0
570 };
571
572 /* set up the pattern buffer. Doesn't matter if we spill
573 * slightly beyond since that's where the read buffer is */
574 for (j = 0; j < len; ) {
575
576 /* fill the buffer with counting (test a) */
577 for ( ; j < min(len, 32); j++)
578 buffer[j] = j;
579 k = j;
580 /* fill the buffer with alternating words of 0x0 and
581 * 0xffff (test b) */
582 for ( ; j < min(len, k + 32); j += 2) {
583 u16 *word = (u16 *)&buffer[j];
584
585 *word = (j & 0x02) ? 0x0000 : 0xffff;
586 }
587 k = j;
588 /* fill with crosstalk (alternating 0x5555 0xaaa)
589 * (test c) */
590 for ( ; j < min(len, k + 32); j += 2) {
591 u16 *word = (u16 *)&buffer[j];
592
593 *word = (j & 0x02) ? 0x5555 : 0xaaaa;
594 }
595 k = j;
596 /* fill with shifting bits (test d) */
597 for ( ; j < min(len, k + 32); j += 4) {
598 u32 *word = (unsigned int *)&buffer[j];
599 u32 roll = (pattern & 0x80000000) ? 1 : 0;
600
601 *word = pattern;
602 pattern = (pattern << 1) | roll;
603 }
604 /* don't bother with random data (test e) */
605 }
606
607 for (r = 0; r < retries; r++) {
33aa687d
JB
608 result = spi_execute(sdev, spi_write_buffer, DMA_TO_DEVICE,
609 buffer, len, &sshdr);
610 if(result || !scsi_device_online(sdev)) {
1da177e4
LT
611
612 scsi_device_set_state(sdev, SDEV_QUIESCE);
33aa687d 613 if (scsi_sense_valid(&sshdr)
1da177e4
LT
614 && sshdr.sense_key == ILLEGAL_REQUEST
615 /* INVALID FIELD IN CDB */
616 && sshdr.asc == 0x24 && sshdr.ascq == 0x00)
617 /* This would mean that the drive lied
618 * to us about supporting an echo
619 * buffer (unfortunately some Western
620 * Digital drives do precisely this)
621 */
622 return SPI_COMPARE_SKIP_TEST;
623
624
9ccfc756 625 sdev_printk(KERN_ERR, sdev, "Write Buffer failure %x\n", result);
1da177e4
LT
626 return SPI_COMPARE_FAILURE;
627 }
628
629 memset(ptr, 0, len);
33aa687d
JB
630 spi_execute(sdev, spi_read_buffer, DMA_FROM_DEVICE,
631 ptr, len, NULL);
1da177e4
LT
632 scsi_device_set_state(sdev, SDEV_QUIESCE);
633
634 if (memcmp(buffer, ptr, len) != 0)
635 return SPI_COMPARE_FAILURE;
636 }
637 return SPI_COMPARE_SUCCESS;
638}
639
640/* This is for the simplest form of Domain Validation: a read test
641 * on the inquiry data from the device */
642static enum spi_compare_returns
33aa687d 643spi_dv_device_compare_inquiry(struct scsi_device *sdev, u8 *buffer,
1da177e4
LT
644 u8 *ptr, const int retries)
645{
33aa687d
JB
646 int r, result;
647 const int len = sdev->inquiry_len;
1da177e4
LT
648 const char spi_inquiry[] = {
649 INQUIRY, 0, 0, 0, len, 0
650 };
651
652 for (r = 0; r < retries; r++) {
1da177e4
LT
653 memset(ptr, 0, len);
654
33aa687d
JB
655 result = spi_execute(sdev, spi_inquiry, DMA_FROM_DEVICE,
656 ptr, len, NULL);
1da177e4 657
33aa687d 658 if(result || !scsi_device_online(sdev)) {
1da177e4
LT
659 scsi_device_set_state(sdev, SDEV_QUIESCE);
660 return SPI_COMPARE_FAILURE;
661 }
662
663 /* If we don't have the inquiry data already, the
664 * first read gets it */
665 if (ptr == buffer) {
666 ptr += len;
667 --r;
668 continue;
669 }
670
671 if (memcmp(buffer, ptr, len) != 0)
672 /* failure */
673 return SPI_COMPARE_FAILURE;
674 }
675 return SPI_COMPARE_SUCCESS;
676}
677
678static enum spi_compare_returns
33aa687d 679spi_dv_retrain(struct scsi_device *sdev, u8 *buffer, u8 *ptr,
1da177e4 680 enum spi_compare_returns
33aa687d 681 (*compare_fn)(struct scsi_device *, u8 *, u8 *, int))
1da177e4 682{
33aa687d 683 struct spi_internal *i = to_spi_internal(sdev->host->transportt);
9a8bc9b8 684 struct scsi_target *starget = sdev->sdev_target;
1da177e4
LT
685 int period = 0, prevperiod = 0;
686 enum spi_compare_returns retval;
687
688
689 for (;;) {
690 int newperiod;
33aa687d 691 retval = compare_fn(sdev, buffer, ptr, DV_LOOPS);
1da177e4
LT
692
693 if (retval == SPI_COMPARE_SUCCESS
694 || retval == SPI_COMPARE_SKIP_TEST)
695 break;
696
697 /* OK, retrain, fallback */
9a8bc9b8
JB
698 if (i->f->get_iu)
699 i->f->get_iu(starget);
700 if (i->f->get_qas)
701 i->f->get_qas(starget);
1da177e4
LT
702 if (i->f->get_period)
703 i->f->get_period(sdev->sdev_target);
9a8bc9b8
JB
704
705 /* Here's the fallback sequence; first try turning off
706 * IU, then QAS (if we can control them), then finally
707 * fall down the periods */
708 if (i->f->set_iu && spi_iu(starget)) {
9ccfc756 709 starget_printk(KERN_ERR, starget, "Domain Validation Disabing Information Units\n");
9a8bc9b8
JB
710 DV_SET(iu, 0);
711 } else if (i->f->set_qas && spi_qas(starget)) {
9ccfc756 712 starget_printk(KERN_ERR, starget, "Domain Validation Disabing Quick Arbitration and Selection\n");
9a8bc9b8
JB
713 DV_SET(qas, 0);
714 } else {
715 newperiod = spi_period(starget);
716 period = newperiod > period ? newperiod : period;
717 if (period < 0x0d)
718 period++;
719 else
720 period += period >> 1;
721
722 if (unlikely(period > 0xff || period == prevperiod)) {
723 /* Total failure; set to async and return */
9ccfc756 724 starget_printk(KERN_ERR, starget, "Domain Validation Failure, dropping back to Asynchronous\n");
9a8bc9b8
JB
725 DV_SET(offset, 0);
726 return SPI_COMPARE_FAILURE;
727 }
9ccfc756 728 starget_printk(KERN_ERR, starget, "Domain Validation detected failure, dropping back\n");
9a8bc9b8
JB
729 DV_SET(period, period);
730 prevperiod = period;
1da177e4 731 }
1da177e4
LT
732 }
733 return retval;
734}
735
736static int
33aa687d 737spi_dv_device_get_echo_buffer(struct scsi_device *sdev, u8 *buffer)
1da177e4 738{
33aa687d 739 int l, result;
1da177e4
LT
740
741 /* first off do a test unit ready. This can error out
742 * because of reservations or some other reason. If it
743 * fails, the device won't let us write to the echo buffer
744 * so just return failure */
745
746 const char spi_test_unit_ready[] = {
747 TEST_UNIT_READY, 0, 0, 0, 0, 0
748 };
749
750 const char spi_read_buffer_descriptor[] = {
751 READ_BUFFER, 0x0b, 0, 0, 0, 0, 0, 0, 4, 0
752 };
753
754
1da177e4
LT
755 /* We send a set of three TURs to clear any outstanding
756 * unit attention conditions if they exist (Otherwise the
757 * buffer tests won't be happy). If the TUR still fails
758 * (reservation conflict, device not ready, etc) just
759 * skip the write tests */
760 for (l = 0; ; l++) {
33aa687d
JB
761 result = spi_execute(sdev, spi_test_unit_ready, DMA_NONE,
762 NULL, 0, NULL);
1da177e4 763
33aa687d 764 if(result) {
1da177e4
LT
765 if(l >= 3)
766 return 0;
767 } else {
768 /* TUR succeeded */
769 break;
770 }
771 }
772
33aa687d
JB
773 result = spi_execute(sdev, spi_read_buffer_descriptor,
774 DMA_FROM_DEVICE, buffer, 4, NULL);
1da177e4 775
33aa687d 776 if (result)
1da177e4
LT
777 /* Device has no echo buffer */
778 return 0;
779
780 return buffer[3] + ((buffer[2] & 0x1f) << 8);
781}
782
783static void
33aa687d 784spi_dv_device_internal(struct scsi_device *sdev, u8 *buffer)
1da177e4 785{
33aa687d 786 struct spi_internal *i = to_spi_internal(sdev->host->transportt);
62a86129 787 struct scsi_target *starget = sdev->sdev_target;
60eef257 788 struct Scsi_Host *shost = sdev->host;
1da177e4
LT
789 int len = sdev->inquiry_len;
790 /* first set us up for narrow async */
791 DV_SET(offset, 0);
792 DV_SET(width, 0);
793
33aa687d 794 if (spi_dv_device_compare_inquiry(sdev, buffer, buffer, DV_LOOPS)
1da177e4 795 != SPI_COMPARE_SUCCESS) {
9ccfc756 796 starget_printk(KERN_ERR, starget, "Domain Validation Initial Inquiry Failed\n");
1da177e4
LT
797 /* FIXME: should probably offline the device here? */
798 return;
799 }
800
801 /* test width */
eb1dd68b
JB
802 if (i->f->set_width && spi_max_width(starget) &&
803 scsi_device_wide(sdev)) {
9a8bc9b8 804 i->f->set_width(starget, 1);
62a86129 805
33aa687d 806 if (spi_dv_device_compare_inquiry(sdev, buffer,
1da177e4
LT
807 buffer + len,
808 DV_LOOPS)
809 != SPI_COMPARE_SUCCESS) {
9ccfc756 810 starget_printk(KERN_ERR, starget, "Wide Transfers Fail\n");
9a8bc9b8 811 i->f->set_width(starget, 0);
1da177e4
LT
812 }
813 }
814
815 if (!i->f->set_period)
816 return;
817
818 /* device can't handle synchronous */
eb1dd68b 819 if (!scsi_device_sync(sdev) && !scsi_device_dt(sdev))
1da177e4
LT
820 return;
821
349cd7cf
JB
822 /* len == -1 is the signal that we need to ascertain the
823 * presence of an echo buffer before trying to use it. len ==
824 * 0 means we don't have an echo buffer */
825 len = -1;
1da177e4
LT
826
827 retry:
828
829 /* now set up to the maximum */
62a86129
JB
830 DV_SET(offset, spi_max_offset(starget));
831 DV_SET(period, spi_min_period(starget));
9a8bc9b8
JB
832 /* try QAS requests; this should be harmless to set if the
833 * target supports it */
eb1dd68b
JB
834 if (scsi_device_qas(sdev))
835 DV_SET(qas, 1);
9a8bc9b8 836 /* Also try IU transfers */
eb1dd68b
JB
837 if (scsi_device_ius(sdev))
838 DV_SET(iu, 1);
9a8bc9b8
JB
839 if (spi_min_period(starget) < 9) {
840 /* This u320 (or u640). Ignore the coupled parameters
841 * like DT and IU, but set the optional ones */
842 DV_SET(rd_strm, 1);
843 DV_SET(wr_flow, 1);
844 DV_SET(rti, 1);
845 if (spi_min_period(starget) == 8)
846 DV_SET(pcomp_en, 1);
847 }
60eef257
JB
848 /* now that we've done all this, actually check the bus
849 * signal type (if known). Some devices are stupid on
850 * a SE bus and still claim they can try LVD only settings */
851 if (i->f->get_signalling)
852 i->f->get_signalling(shost);
853 if (spi_signalling(shost) == SPI_SIGNAL_SE ||
854 spi_signalling(shost) == SPI_SIGNAL_HVD)
855 DV_SET(dt, 0);
349cd7cf
JB
856 /* Do the read only INQUIRY tests */
857 spi_dv_retrain(sdev, buffer, buffer + sdev->inquiry_len,
858 spi_dv_device_compare_inquiry);
859 /* See if we actually managed to negotiate and sustain DT */
860 if (i->f->get_dt)
861 i->f->get_dt(starget);
862
863 /* see if the device has an echo buffer. If it does we can do
864 * the SPI pattern write tests. Because of some broken
865 * devices, we *only* try this on a device that has actually
866 * negotiated DT */
867
868 if (len == -1 && spi_dt(starget))
869 len = spi_dv_device_get_echo_buffer(sdev, buffer);
1da177e4 870
349cd7cf 871 if (len <= 0) {
9ccfc756 872 starget_printk(KERN_INFO, starget, "Domain Validation skipping write tests\n");
1da177e4
LT
873 return;
874 }
875
876 if (len > SPI_MAX_ECHO_BUFFER_SIZE) {
9ccfc756 877 starget_printk(KERN_WARNING, starget, "Echo buffer size %d is too big, trimming to %d\n", len, SPI_MAX_ECHO_BUFFER_SIZE);
1da177e4
LT
878 len = SPI_MAX_ECHO_BUFFER_SIZE;
879 }
880
33aa687d 881 if (spi_dv_retrain(sdev, buffer, buffer + len,
1da177e4
LT
882 spi_dv_device_echo_buffer)
883 == SPI_COMPARE_SKIP_TEST) {
884 /* OK, the stupid drive can't do a write echo buffer
885 * test after all, fall back to the read tests */
886 len = 0;
887 goto retry;
888 }
889}
890
891
892/** spi_dv_device - Do Domain Validation on the device
893 * @sdev: scsi device to validate
894 *
895 * Performs the domain validation on the given device in the
896 * current execution thread. Since DV operations may sleep,
897 * the current thread must have user context. Also no SCSI
898 * related locks that would deadlock I/O issued by the DV may
899 * be held.
900 */
901void
902spi_dv_device(struct scsi_device *sdev)
903{
1da177e4
LT
904 struct scsi_target *starget = sdev->sdev_target;
905 u8 *buffer;
906 const int len = SPI_MAX_ECHO_BUFFER_SIZE*2;
907
1da177e4 908 if (unlikely(scsi_device_get(sdev)))
33aa687d 909 return;
1da177e4 910
24669f75 911 buffer = kzalloc(len, GFP_KERNEL);
1da177e4
LT
912
913 if (unlikely(!buffer))
914 goto out_put;
915
1da177e4
LT
916 /* We need to verify that the actual device will quiesce; the
917 * later target quiesce is just a nice to have */
918 if (unlikely(scsi_device_quiesce(sdev)))
919 goto out_free;
920
921 scsi_target_quiesce(starget);
922
923 spi_dv_pending(starget) = 1;
d158d261 924 mutex_lock(&spi_dv_mutex(starget));
1da177e4 925
9ccfc756 926 starget_printk(KERN_INFO, starget, "Beginning Domain Validation\n");
1da177e4 927
33aa687d 928 spi_dv_device_internal(sdev, buffer);
1da177e4 929
9ccfc756 930 starget_printk(KERN_INFO, starget, "Ending Domain Validation\n");
1da177e4 931
d158d261 932 mutex_unlock(&spi_dv_mutex(starget));
1da177e4
LT
933 spi_dv_pending(starget) = 0;
934
935 scsi_target_resume(starget);
936
937 spi_initial_dv(starget) = 1;
938
939 out_free:
940 kfree(buffer);
941 out_put:
942 scsi_device_put(sdev);
1da177e4
LT
943}
944EXPORT_SYMBOL(spi_dv_device);
945
946struct work_queue_wrapper {
947 struct work_struct work;
948 struct scsi_device *sdev;
949};
950
951static void
952spi_dv_device_work_wrapper(void *data)
953{
954 struct work_queue_wrapper *wqw = (struct work_queue_wrapper *)data;
955 struct scsi_device *sdev = wqw->sdev;
956
957 kfree(wqw);
958 spi_dv_device(sdev);
959 spi_dv_pending(sdev->sdev_target) = 0;
960 scsi_device_put(sdev);
961}
962
963
964/**
965 * spi_schedule_dv_device - schedule domain validation to occur on the device
966 * @sdev: The device to validate
967 *
968 * Identical to spi_dv_device() above, except that the DV will be
969 * scheduled to occur in a workqueue later. All memory allocations
970 * are atomic, so may be called from any context including those holding
971 * SCSI locks.
972 */
973void
974spi_schedule_dv_device(struct scsi_device *sdev)
975{
976 struct work_queue_wrapper *wqw =
977 kmalloc(sizeof(struct work_queue_wrapper), GFP_ATOMIC);
978
979 if (unlikely(!wqw))
980 return;
981
982 if (unlikely(spi_dv_pending(sdev->sdev_target))) {
983 kfree(wqw);
984 return;
985 }
986 /* Set pending early (dv_device doesn't check it, only sets it) */
987 spi_dv_pending(sdev->sdev_target) = 1;
988 if (unlikely(scsi_device_get(sdev))) {
989 kfree(wqw);
990 spi_dv_pending(sdev->sdev_target) = 0;
991 return;
992 }
993
994 INIT_WORK(&wqw->work, spi_dv_device_work_wrapper, wqw);
995 wqw->sdev = sdev;
996
997 schedule_work(&wqw->work);
998}
999EXPORT_SYMBOL(spi_schedule_dv_device);
1000
1001/**
1002 * spi_display_xfer_agreement - Print the current target transfer agreement
1003 * @starget: The target for which to display the agreement
1004 *
1005 * Each SPI port is required to maintain a transfer agreement for each
1006 * other port on the bus. This function prints a one-line summary of
1007 * the current agreement; more detailed information is available in sysfs.
1008 */
1009void spi_display_xfer_agreement(struct scsi_target *starget)
1010{
1011 struct spi_transport_attrs *tp;
1012 tp = (struct spi_transport_attrs *)&starget->starget_data;
1013
1014 if (tp->offset > 0 && tp->period > 0) {
1015 unsigned int picosec, kb100;
1016 char *scsi = "FAST-?";
1017 char tmp[8];
1018
1019 if (tp->period <= SPI_STATIC_PPR) {
1020 picosec = ppr_to_ps[tp->period];
1021 switch (tp->period) {
1022 case 7: scsi = "FAST-320"; break;
1023 case 8: scsi = "FAST-160"; break;
1024 case 9: scsi = "FAST-80"; break;
1025 case 10:
1026 case 11: scsi = "FAST-40"; break;
1027 case 12: scsi = "FAST-20"; break;
1028 }
1029 } else {
1030 picosec = tp->period * 4000;
1031 if (tp->period < 25)
1032 scsi = "FAST-20";
1033 else if (tp->period < 50)
1034 scsi = "FAST-10";
1035 else
1036 scsi = "FAST-5";
1037 }
1038
1039 kb100 = (10000000 + picosec / 2) / picosec;
1040 if (tp->width)
1041 kb100 *= 2;
1042 sprint_frac(tmp, picosec, 1000);
1043
1044 dev_info(&starget->dev,
d872ebe4
JB
1045 "%s %sSCSI %d.%d MB/s %s%s%s%s%s%s%s%s (%s ns, offset %d)\n",
1046 scsi, tp->width ? "WIDE " : "", kb100/10, kb100 % 10,
1047 tp->dt ? "DT" : "ST",
1048 tp->iu ? " IU" : "",
1049 tp->qas ? " QAS" : "",
1050 tp->rd_strm ? " RDSTRM" : "",
1051 tp->rti ? " RTI" : "",
1052 tp->wr_flow ? " WRFLOW" : "",
1053 tp->pcomp_en ? " PCOMP" : "",
1054 tp->hold_mcs ? " HMCS" : "",
1055 tmp, tp->offset);
1da177e4 1056 } else {
493ff4ee 1057 dev_info(&starget->dev, "%sasynchronous\n",
1da177e4
LT
1058 tp->width ? "wide " : "");
1059 }
1060}
1061EXPORT_SYMBOL(spi_display_xfer_agreement);
1062
6ea3c0b2
MW
1063int spi_populate_width_msg(unsigned char *msg, int width)
1064{
1065 msg[0] = EXTENDED_MESSAGE;
1066 msg[1] = 2;
1067 msg[2] = EXTENDED_WDTR;
1068 msg[3] = width;
1069 return 4;
1070}
38e14f89 1071EXPORT_SYMBOL_GPL(spi_populate_width_msg);
6ea3c0b2
MW
1072
1073int spi_populate_sync_msg(unsigned char *msg, int period, int offset)
1074{
1075 msg[0] = EXTENDED_MESSAGE;
1076 msg[1] = 3;
1077 msg[2] = EXTENDED_SDTR;
1078 msg[3] = period;
1079 msg[4] = offset;
1080 return 5;
1081}
38e14f89 1082EXPORT_SYMBOL_GPL(spi_populate_sync_msg);
6ea3c0b2
MW
1083
1084int spi_populate_ppr_msg(unsigned char *msg, int period, int offset,
1085 int width, int options)
1086{
1087 msg[0] = EXTENDED_MESSAGE;
1088 msg[1] = 6;
1089 msg[2] = EXTENDED_PPR;
1090 msg[3] = period;
1091 msg[4] = 0;
1092 msg[5] = offset;
1093 msg[6] = width;
1094 msg[7] = options;
1095 return 8;
1096}
38e14f89 1097EXPORT_SYMBOL_GPL(spi_populate_ppr_msg);
6ea3c0b2 1098
410ca5c7
MW
1099#ifdef CONFIG_SCSI_CONSTANTS
1100static const char * const one_byte_msgs[] = {
72df0ebf 1101/* 0x00 */ "Task Complete", NULL /* Extended Message */, "Save Pointers",
410ca5c7 1102/* 0x03 */ "Restore Pointers", "Disconnect", "Initiator Error",
72df0ebf 1103/* 0x06 */ "Abort Task Set", "Message Reject", "Nop", "Message Parity Error",
410ca5c7 1104/* 0x0a */ "Linked Command Complete", "Linked Command Complete w/flag",
72df0ebf
MW
1105/* 0x0c */ "Target Reset", "Abort Task", "Clear Task Set",
1106/* 0x0f */ "Initiate Recovery", "Release Recovery",
1107/* 0x11 */ "Terminate Process", "Continue Task", "Target Transfer Disable",
1108/* 0x14 */ NULL, NULL, "Clear ACA", "LUN Reset"
410ca5c7 1109};
410ca5c7
MW
1110
1111static const char * const two_byte_msgs[] = {
47972153 1112/* 0x20 */ "Simple Queue Tag", "Head of Queue Tag", "Ordered Queue Tag",
72df0ebf 1113/* 0x23 */ "Ignore Wide Residue", "ACA"
410ca5c7 1114};
410ca5c7
MW
1115
1116static const char * const extended_msgs[] = {
1117/* 0x00 */ "Modify Data Pointer", "Synchronous Data Transfer Request",
ef72582e 1118/* 0x02 */ "SCSI-I Extended Identify", "Wide Data Transfer Request",
fc25307d 1119/* 0x04 */ "Parallel Protocol Request", "Modify Bidirectional Data Pointer"
410ca5c7 1120};
410ca5c7 1121
bdd70f2c 1122static void print_nego(const unsigned char *msg, int per, int off, int width)
ef72582e
MW
1123{
1124 if (per) {
1125 char buf[20];
1126 period_to_str(buf, msg[per]);
1127 printk("period = %s ns ", buf);
1128 }
1129
1130 if (off)
1131 printk("offset = %d ", msg[off]);
1132 if (width)
1133 printk("width = %d ", 8 << msg[width]);
1134}
410ca5c7 1135
fc25307d
MW
1136static void print_ptr(const unsigned char *msg, int msb, const char *desc)
1137{
1138 int ptr = (msg[msb] << 24) | (msg[msb+1] << 16) | (msg[msb+2] << 8) |
1139 msg[msb+3];
1140 printk("%s = %d ", desc, ptr);
1141}
1142
1abfd370 1143int spi_print_msg(const unsigned char *msg)
410ca5c7 1144{
72df0ebf 1145 int len = 1, i;
410ca5c7 1146 if (msg[0] == EXTENDED_MESSAGE) {
fc25307d
MW
1147 len = 2 + msg[1];
1148 if (len == 2)
1149 len += 256;
b32aaffc 1150 if (msg[2] < ARRAY_SIZE(extended_msgs))
410ca5c7
MW
1151 printk ("%s ", extended_msgs[msg[2]]);
1152 else
1153 printk ("Extended Message, reserved code (0x%02x) ",
1154 (int) msg[2]);
1155 switch (msg[2]) {
1156 case EXTENDED_MODIFY_DATA_POINTER:
fc25307d 1157 print_ptr(msg, 3, "pointer");
410ca5c7
MW
1158 break;
1159 case EXTENDED_SDTR:
ef72582e 1160 print_nego(msg, 3, 4, 0);
410ca5c7
MW
1161 break;
1162 case EXTENDED_WDTR:
ef72582e
MW
1163 print_nego(msg, 0, 0, 3);
1164 break;
1165 case EXTENDED_PPR:
1166 print_nego(msg, 3, 5, 6);
410ca5c7 1167 break;
fc25307d
MW
1168 case EXTENDED_MODIFY_BIDI_DATA_PTR:
1169 print_ptr(msg, 3, "out");
1170 print_ptr(msg, 7, "in");
1171 break;
410ca5c7
MW
1172 default:
1173 for (i = 2; i < len; ++i)
1174 printk("%02x ", msg[i]);
1175 }
1176 /* Identify */
1177 } else if (msg[0] & 0x80) {
1178 printk("Identify disconnect %sallowed %s %d ",
1179 (msg[0] & 0x40) ? "" : "not ",
1180 (msg[0] & 0x20) ? "target routine" : "lun",
1181 msg[0] & 0x7);
410ca5c7
MW
1182 /* Normal One byte */
1183 } else if (msg[0] < 0x1f) {
72df0ebf 1184 if (msg[0] < ARRAY_SIZE(one_byte_msgs) && one_byte_msgs[msg[0]])
e24d873d 1185 printk("%s ", one_byte_msgs[msg[0]]);
410ca5c7
MW
1186 else
1187 printk("reserved (%02x) ", msg[0]);
72df0ebf
MW
1188 } else if (msg[0] == 0x55) {
1189 printk("QAS Request ");
410ca5c7
MW
1190 /* Two byte */
1191 } else if (msg[0] <= 0x2f) {
b32aaffc 1192 if ((msg[0] - 0x20) < ARRAY_SIZE(two_byte_msgs))
410ca5c7
MW
1193 printk("%s %02x ", two_byte_msgs[msg[0] - 0x20],
1194 msg[1]);
1195 else
1196 printk("reserved two byte (%02x %02x) ",
1197 msg[0], msg[1]);
1198 len = 2;
1199 } else
e24d873d 1200 printk("reserved ");
410ca5c7
MW
1201 return len;
1202}
1abfd370 1203EXPORT_SYMBOL(spi_print_msg);
410ca5c7
MW
1204
1205#else /* ifndef CONFIG_SCSI_CONSTANTS */
1206
1abfd370 1207int spi_print_msg(const unsigned char *msg)
410ca5c7 1208{
72df0ebf 1209 int len = 1, i;
410ca5c7
MW
1210
1211 if (msg[0] == EXTENDED_MESSAGE) {
fc25307d
MW
1212 len = 2 + msg[1];
1213 if (len == 2)
1214 len += 256;
410ca5c7
MW
1215 for (i = 0; i < len; ++i)
1216 printk("%02x ", msg[i]);
1217 /* Identify */
1218 } else if (msg[0] & 0x80) {
1219 printk("%02x ", msg[0]);
410ca5c7 1220 /* Normal One byte */
597705aa 1221 } else if ((msg[0] < 0x1f) || (msg[0] == 0x55)) {
410ca5c7 1222 printk("%02x ", msg[0]);
410ca5c7
MW
1223 /* Two byte */
1224 } else if (msg[0] <= 0x2f) {
1225 printk("%02x %02x", msg[0], msg[1]);
1226 len = 2;
1227 } else
1228 printk("%02x ", msg[0]);
1229 return len;
1230}
1abfd370 1231EXPORT_SYMBOL(spi_print_msg);
410ca5c7
MW
1232#endif /* ! CONFIG_SCSI_CONSTANTS */
1233
1da177e4
LT
1234#define SETUP_ATTRIBUTE(field) \
1235 i->private_attrs[count] = class_device_attr_##field; \
1236 if (!i->f->set_##field) { \
1237 i->private_attrs[count].attr.mode = S_IRUGO; \
1238 i->private_attrs[count].store = NULL; \
1239 } \
1240 i->attrs[count] = &i->private_attrs[count]; \
1241 if (i->f->show_##field) \
1242 count++
1243
62a86129
JB
1244#define SETUP_RELATED_ATTRIBUTE(field, rel_field) \
1245 i->private_attrs[count] = class_device_attr_##field; \
1246 if (!i->f->set_##rel_field) { \
1247 i->private_attrs[count].attr.mode = S_IRUGO; \
1248 i->private_attrs[count].store = NULL; \
1249 } \
1250 i->attrs[count] = &i->private_attrs[count]; \
1251 if (i->f->show_##rel_field) \
1252 count++
1253
1da177e4
LT
1254#define SETUP_HOST_ATTRIBUTE(field) \
1255 i->private_host_attrs[count] = class_device_attr_##field; \
1256 if (!i->f->set_##field) { \
1257 i->private_host_attrs[count].attr.mode = S_IRUGO; \
1258 i->private_host_attrs[count].store = NULL; \
1259 } \
1260 i->host_attrs[count] = &i->private_host_attrs[count]; \
1261 count++
1262
1263static int spi_device_match(struct attribute_container *cont,
1264 struct device *dev)
1265{
1266 struct scsi_device *sdev;
1267 struct Scsi_Host *shost;
10c1b889 1268 struct spi_internal *i;
1da177e4
LT
1269
1270 if (!scsi_is_sdev_device(dev))
1271 return 0;
1272
1273 sdev = to_scsi_device(dev);
1274 shost = sdev->host;
1275 if (!shost->transportt || shost->transportt->host_attrs.ac.class
1276 != &spi_host_class.class)
1277 return 0;
1278 /* Note: this class has no device attributes, so it has
1279 * no per-HBA allocation and thus we don't need to distinguish
1280 * the attribute containers for the device */
10c1b889
JB
1281 i = to_spi_internal(shost->transportt);
1282 if (i->f->deny_binding && i->f->deny_binding(sdev->sdev_target))
1283 return 0;
1da177e4
LT
1284 return 1;
1285}
1286
1287static int spi_target_match(struct attribute_container *cont,
1288 struct device *dev)
1289{
1290 struct Scsi_Host *shost;
10c1b889 1291 struct scsi_target *starget;
1da177e4
LT
1292 struct spi_internal *i;
1293
1294 if (!scsi_is_target_device(dev))
1295 return 0;
1296
1297 shost = dev_to_shost(dev->parent);
1298 if (!shost->transportt || shost->transportt->host_attrs.ac.class
1299 != &spi_host_class.class)
1300 return 0;
1301
1302 i = to_spi_internal(shost->transportt);
10c1b889
JB
1303 starget = to_scsi_target(dev);
1304
1305 if (i->f->deny_binding && i->f->deny_binding(starget))
1306 return 0;
1307
1da177e4
LT
1308 return &i->t.target_attrs.ac == cont;
1309}
1310
1311static DECLARE_TRANSPORT_CLASS(spi_transport_class,
1312 "spi_transport",
1313 spi_setup_transport_attrs,
1314 NULL,
1315 NULL);
1316
1317static DECLARE_ANON_TRANSPORT_CLASS(spi_device_class,
1318 spi_device_match,
1319 spi_device_configure);
1320
1321struct scsi_transport_template *
1322spi_attach_transport(struct spi_function_template *ft)
1323{
1da177e4 1324 int count = 0;
24669f75
JS
1325 struct spi_internal *i = kzalloc(sizeof(struct spi_internal),
1326 GFP_KERNEL);
1327
1da177e4
LT
1328 if (unlikely(!i))
1329 return NULL;
1330
1da177e4
LT
1331 i->t.target_attrs.ac.class = &spi_transport_class.class;
1332 i->t.target_attrs.ac.attrs = &i->attrs[0];
1333 i->t.target_attrs.ac.match = spi_target_match;
1334 transport_container_register(&i->t.target_attrs);
1335 i->t.target_size = sizeof(struct spi_transport_attrs);
1336 i->t.host_attrs.ac.class = &spi_host_class.class;
1337 i->t.host_attrs.ac.attrs = &i->host_attrs[0];
1338 i->t.host_attrs.ac.match = spi_host_match;
1339 transport_container_register(&i->t.host_attrs);
1340 i->t.host_size = sizeof(struct spi_host_attrs);
1341 i->f = ft;
1342
1343 SETUP_ATTRIBUTE(period);
62a86129 1344 SETUP_RELATED_ATTRIBUTE(min_period, period);
1da177e4 1345 SETUP_ATTRIBUTE(offset);
62a86129 1346 SETUP_RELATED_ATTRIBUTE(max_offset, offset);
1da177e4 1347 SETUP_ATTRIBUTE(width);
62a86129 1348 SETUP_RELATED_ATTRIBUTE(max_width, width);
1da177e4
LT
1349 SETUP_ATTRIBUTE(iu);
1350 SETUP_ATTRIBUTE(dt);
1351 SETUP_ATTRIBUTE(qas);
1352 SETUP_ATTRIBUTE(wr_flow);
1353 SETUP_ATTRIBUTE(rd_strm);
1354 SETUP_ATTRIBUTE(rti);
1355 SETUP_ATTRIBUTE(pcomp_en);
d872ebe4 1356 SETUP_ATTRIBUTE(hold_mcs);
1da177e4
LT
1357
1358 /* if you add an attribute but forget to increase SPI_NUM_ATTRS
1359 * this bug will trigger */
1360 BUG_ON(count > SPI_NUM_ATTRS);
1361
1362 i->attrs[count++] = &class_device_attr_revalidate;
1363
1364 i->attrs[count] = NULL;
1365
1366 count = 0;
1367 SETUP_HOST_ATTRIBUTE(signalling);
1368
1369 BUG_ON(count > SPI_HOST_ATTRS);
1370
1371 i->host_attrs[count] = NULL;
1372
1373 return &i->t;
1374}
1375EXPORT_SYMBOL(spi_attach_transport);
1376
1377void spi_release_transport(struct scsi_transport_template *t)
1378{
1379 struct spi_internal *i = to_spi_internal(t);
1380
1381 transport_container_unregister(&i->t.target_attrs);
1382 transport_container_unregister(&i->t.host_attrs);
1383
1384 kfree(i);
1385}
1386EXPORT_SYMBOL(spi_release_transport);
1387
1388static __init int spi_transport_init(void)
1389{
1390 int error = transport_class_register(&spi_transport_class);
1391 if (error)
1392 return error;
1393 error = anon_transport_class_register(&spi_device_class);
1394 return transport_class_register(&spi_host_class);
1395}
1396
1397static void __exit spi_transport_exit(void)
1398{
1399 transport_class_unregister(&spi_transport_class);
1400 anon_transport_class_unregister(&spi_device_class);
1401 transport_class_unregister(&spi_host_class);
1402}
1403
1404MODULE_AUTHOR("Martin Hicks");
1405MODULE_DESCRIPTION("SPI Transport Attributes");
1406MODULE_LICENSE("GPL");
1407
1408module_init(spi_transport_init);
1409module_exit(spi_transport_exit);