Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | */ |
| 21 | #include <linux/ctype.h> |
| 22 | #include <linux/init.h> |
| 23 | #include <linux/module.h> |
| 24 | #include <linux/workqueue.h> |
James Bottomley | 949bf79 | 2005-05-01 18:58:15 -0500 | [diff] [blame] | 25 | #include <linux/blkdev.h> |
Jes Sorensen | d158d26 | 2006-01-13 16:05:44 -0800 | [diff] [blame] | 26 | #include <linux/mutex.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 27 | #include <scsi/scsi.h> |
| 28 | #include "scsi_priv.h" |
| 29 | #include <scsi/scsi_device.h> |
| 30 | #include <scsi/scsi_host.h> |
James Bottomley | 33aa687 | 2005-08-28 11:31:14 -0500 | [diff] [blame] | 31 | #include <scsi/scsi_cmnd.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 32 | #include <scsi/scsi_eh.h> |
| 33 | #include <scsi/scsi_transport.h> |
| 34 | #include <scsi/scsi_transport_spi.h> |
| 35 | |
James Bottomley | d872ebe | 2005-08-03 15:43:52 -0500 | [diff] [blame] | 36 | #define SPI_NUM_ATTRS 14 /* increase this if you add attributes */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 37 | #define SPI_OTHER_ATTRS 1 /* Increase this if you add "always |
| 38 | * on" attributes */ |
| 39 | #define SPI_HOST_ATTRS 1 |
| 40 | |
| 41 | #define SPI_MAX_ECHO_BUFFER_SIZE 4096 |
| 42 | |
James Bottomley | 949bf79 | 2005-05-01 18:58:15 -0500 | [diff] [blame] | 43 | #define DV_LOOPS 3 |
| 44 | #define DV_TIMEOUT (10*HZ) |
| 45 | #define DV_RETRIES 3 /* should only need at most |
| 46 | * two cc/ua clears */ |
| 47 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 48 | /* Private data accessors (keep these out of the header file) */ |
| 49 | #define spi_dv_pending(x) (((struct spi_transport_attrs *)&(x)->starget_data)->dv_pending) |
James Bottomley | dfdc58b | 2006-09-20 12:00:18 -0400 | [diff] [blame] | 50 | #define spi_dv_in_progress(x) (((struct spi_transport_attrs *)&(x)->starget_data)->dv_in_progress) |
Jes Sorensen | d158d26 | 2006-01-13 16:05:44 -0800 | [diff] [blame] | 51 | #define spi_dv_mutex(x) (((struct spi_transport_attrs *)&(x)->starget_data)->dv_mutex) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 52 | |
| 53 | struct 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 | |
| 67 | static 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 | |
| 88 | static 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 | |
James Bottomley | 33aa687 | 2005-08-28 11:31:14 -0500 | [diff] [blame] | 108 | static 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) |
James Bottomley | 949bf79 | 2005-05-01 18:58:15 -0500 | [diff] [blame] | 112 | { |
James Bottomley | 33aa687 | 2005-08-28 11:31:14 -0500 | [diff] [blame] | 113 | int i, result; |
| 114 | unsigned char sense[SCSI_SENSE_BUFFERSIZE]; |
James Bottomley | 949bf79 | 2005-05-01 18:58:15 -0500 | [diff] [blame] | 115 | |
| 116 | for(i = 0; i < DV_RETRIES; i++) { |
James Bottomley | 33aa687 | 2005-08-28 11:31:14 -0500 | [diff] [blame] | 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; |
James Bottomley | 949bf79 | 2005-05-01 18:58:15 -0500 | [diff] [blame] | 124 | |
James Bottomley | 33aa687 | 2005-08-28 11:31:14 -0500 | [diff] [blame] | 125 | if (scsi_normalize_sense(sense, sizeof(*sense), |
| 126 | sshdr) |
| 127 | && sshdr->sense_key == UNIT_ATTENTION) |
James Bottomley | 949bf79 | 2005-05-01 18:58:15 -0500 | [diff] [blame] | 128 | continue; |
| 129 | } |
| 130 | break; |
| 131 | } |
James Bottomley | 33aa687 | 2005-08-28 11:31:14 -0500 | [diff] [blame] | 132 | return result; |
James Bottomley | 949bf79 | 2005-05-01 18:58:15 -0500 | [diff] [blame] | 133 | } |
| 134 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 135 | static 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 | |
| 145 | static inline const char *spi_signal_to_string(enum spi_signal_type type) |
| 146 | { |
| 147 | int i; |
| 148 | |
Tobias Klauser | 6391a11 | 2006-06-08 22:23:48 -0700 | [diff] [blame] | 149 | for (i = 0; i < ARRAY_SIZE(signal_types); i++) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 150 | if (type == signal_types[i].value) |
| 151 | return signal_types[i].name; |
| 152 | } |
| 153 | return NULL; |
| 154 | } |
| 155 | static inline enum spi_signal_type spi_signal_to_value(const char *name) |
| 156 | { |
| 157 | int i, len; |
| 158 | |
Tobias Klauser | 6391a11 | 2006-06-08 22:23:48 -0700 | [diff] [blame] | 159 | for (i = 0; i < ARRAY_SIZE(signal_types); i++) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
James Bottomley | d0a7e57 | 2005-08-14 17:09:01 -0500 | [diff] [blame] | 168 | static int spi_host_setup(struct transport_container *tc, struct device *dev, |
| 169 | struct class_device *cdev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 170 | { |
| 171 | struct Scsi_Host *shost = dev_to_shost(dev); |
| 172 | |
| 173 | spi_signalling(shost) = SPI_SIGNAL_UNKNOWN; |
| 174 | |
| 175 | return 0; |
| 176 | } |
| 177 | |
| 178 | static DECLARE_TRANSPORT_CLASS(spi_host_class, |
| 179 | "spi_host", |
| 180 | spi_host_setup, |
| 181 | NULL, |
| 182 | NULL); |
| 183 | |
| 184 | static 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 | |
James Bottomley | d0a7e57 | 2005-08-14 17:09:01 -0500 | [diff] [blame] | 203 | static int spi_device_configure(struct transport_container *tc, |
| 204 | struct device *dev, |
| 205 | struct class_device *cdev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
James Bottomley | d0a7e57 | 2005-08-14 17:09:01 -0500 | [diff] [blame] | 223 | static int spi_setup_transport_attrs(struct transport_container *tc, |
| 224 | struct device *dev, |
| 225 | struct class_device *cdev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 226 | { |
| 227 | struct scsi_target *starget = to_scsi_target(dev); |
| 228 | |
| 229 | spi_period(starget) = -1; /* illegal value */ |
James Bottomley | 62a8612 | 2005-05-06 18:05:20 -0500 | [diff] [blame] | 230 | spi_min_period(starget) = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 231 | spi_offset(starget) = 0; /* async */ |
James Bottomley | 62a8612 | 2005-05-06 18:05:20 -0500 | [diff] [blame] | 232 | spi_max_offset(starget) = 255; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 233 | spi_width(starget) = 0; /* narrow */ |
James Bottomley | 62a8612 | 2005-05-06 18:05:20 -0500 | [diff] [blame] | 234 | spi_max_width(starget) = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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; |
James Bottomley | d872ebe | 2005-08-03 15:43:52 -0500 | [diff] [blame] | 242 | spi_hold_mcs(starget) = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 243 | spi_dv_pending(starget) = 0; |
James Bottomley | dfdc58b | 2006-09-20 12:00:18 -0400 | [diff] [blame] | 244 | spi_dv_in_progress(starget) = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 245 | spi_initial_dv(starget) = 0; |
Jes Sorensen | d158d26 | 2006-01-13 16:05:44 -0800 | [diff] [blame] | 246 | mutex_init(&spi_dv_mutex(starget)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 247 | |
| 248 | return 0; |
| 249 | } |
| 250 | |
James Bottomley | 62a8612 | 2005-05-06 18:05:20 -0500 | [diff] [blame] | 251 | #define spi_transport_show_simple(field, format_string) \ |
| 252 | \ |
| 253 | static ssize_t \ |
| 254 | show_spi_transport_##field(struct class_device *cdev, char *buf) \ |
| 255 | { \ |
| 256 | struct scsi_target *starget = transport_class_to_starget(cdev); \ |
| 257 | struct spi_transport_attrs *tp; \ |
| 258 | \ |
| 259 | tp = (struct spi_transport_attrs *)&starget->starget_data; \ |
| 260 | return snprintf(buf, 20, format_string, tp->field); \ |
| 261 | } |
| 262 | |
| 263 | #define spi_transport_store_simple(field, format_string) \ |
| 264 | \ |
| 265 | static ssize_t \ |
| 266 | store_spi_transport_##field(struct class_device *cdev, const char *buf, \ |
| 267 | size_t count) \ |
| 268 | { \ |
| 269 | int val; \ |
| 270 | struct scsi_target *starget = transport_class_to_starget(cdev); \ |
| 271 | struct spi_transport_attrs *tp; \ |
| 272 | \ |
| 273 | tp = (struct spi_transport_attrs *)&starget->starget_data; \ |
| 274 | val = simple_strtoul(buf, NULL, 0); \ |
| 275 | tp->field = val; \ |
| 276 | return count; \ |
| 277 | } |
| 278 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 279 | #define spi_transport_show_function(field, format_string) \ |
| 280 | \ |
| 281 | static ssize_t \ |
| 282 | show_spi_transport_##field(struct class_device *cdev, char *buf) \ |
| 283 | { \ |
| 284 | struct scsi_target *starget = transport_class_to_starget(cdev); \ |
| 285 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); \ |
| 286 | struct spi_transport_attrs *tp; \ |
| 287 | struct spi_internal *i = to_spi_internal(shost->transportt); \ |
| 288 | tp = (struct spi_transport_attrs *)&starget->starget_data; \ |
| 289 | if (i->f->get_##field) \ |
| 290 | i->f->get_##field(starget); \ |
| 291 | return snprintf(buf, 20, format_string, tp->field); \ |
| 292 | } |
| 293 | |
| 294 | #define spi_transport_store_function(field, format_string) \ |
| 295 | static ssize_t \ |
| 296 | store_spi_transport_##field(struct class_device *cdev, const char *buf, \ |
| 297 | size_t count) \ |
| 298 | { \ |
| 299 | int val; \ |
| 300 | struct scsi_target *starget = transport_class_to_starget(cdev); \ |
| 301 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); \ |
| 302 | struct spi_internal *i = to_spi_internal(shost->transportt); \ |
| 303 | \ |
| 304 | val = simple_strtoul(buf, NULL, 0); \ |
James Bottomley | 62a8612 | 2005-05-06 18:05:20 -0500 | [diff] [blame] | 305 | i->f->set_##field(starget, val); \ |
| 306 | return count; \ |
| 307 | } |
| 308 | |
| 309 | #define spi_transport_store_max(field, format_string) \ |
| 310 | static ssize_t \ |
| 311 | store_spi_transport_##field(struct class_device *cdev, const char *buf, \ |
| 312 | size_t count) \ |
| 313 | { \ |
| 314 | int val; \ |
| 315 | struct scsi_target *starget = transport_class_to_starget(cdev); \ |
| 316 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); \ |
| 317 | struct spi_internal *i = to_spi_internal(shost->transportt); \ |
| 318 | struct spi_transport_attrs *tp \ |
| 319 | = (struct spi_transport_attrs *)&starget->starget_data; \ |
| 320 | \ |
| 321 | val = simple_strtoul(buf, NULL, 0); \ |
| 322 | if (val > tp->max_##field) \ |
| 323 | val = tp->max_##field; \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 324 | i->f->set_##field(starget, val); \ |
| 325 | return count; \ |
| 326 | } |
| 327 | |
| 328 | #define spi_transport_rd_attr(field, format_string) \ |
| 329 | spi_transport_show_function(field, format_string) \ |
| 330 | spi_transport_store_function(field, format_string) \ |
| 331 | static CLASS_DEVICE_ATTR(field, S_IRUGO | S_IWUSR, \ |
| 332 | show_spi_transport_##field, \ |
| 333 | store_spi_transport_##field); |
| 334 | |
James Bottomley | 62a8612 | 2005-05-06 18:05:20 -0500 | [diff] [blame] | 335 | #define spi_transport_simple_attr(field, format_string) \ |
| 336 | spi_transport_show_simple(field, format_string) \ |
| 337 | spi_transport_store_simple(field, format_string) \ |
| 338 | static CLASS_DEVICE_ATTR(field, S_IRUGO | S_IWUSR, \ |
| 339 | show_spi_transport_##field, \ |
| 340 | store_spi_transport_##field); |
| 341 | |
| 342 | #define spi_transport_max_attr(field, format_string) \ |
| 343 | spi_transport_show_function(field, format_string) \ |
| 344 | spi_transport_store_max(field, format_string) \ |
| 345 | spi_transport_simple_attr(max_##field, format_string) \ |
| 346 | static CLASS_DEVICE_ATTR(field, S_IRUGO | S_IWUSR, \ |
| 347 | show_spi_transport_##field, \ |
| 348 | store_spi_transport_##field); |
| 349 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 350 | /* The Parallel SCSI Tranport Attributes: */ |
James Bottomley | 62a8612 | 2005-05-06 18:05:20 -0500 | [diff] [blame] | 351 | spi_transport_max_attr(offset, "%d\n"); |
| 352 | spi_transport_max_attr(width, "%d\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 353 | spi_transport_rd_attr(iu, "%d\n"); |
| 354 | spi_transport_rd_attr(dt, "%d\n"); |
| 355 | spi_transport_rd_attr(qas, "%d\n"); |
| 356 | spi_transport_rd_attr(wr_flow, "%d\n"); |
| 357 | spi_transport_rd_attr(rd_strm, "%d\n"); |
| 358 | spi_transport_rd_attr(rti, "%d\n"); |
| 359 | spi_transport_rd_attr(pcomp_en, "%d\n"); |
James Bottomley | d872ebe | 2005-08-03 15:43:52 -0500 | [diff] [blame] | 360 | spi_transport_rd_attr(hold_mcs, "%d\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 361 | |
gregkh@suse.de | 9a881f1 | 2005-03-25 15:52:00 -0800 | [diff] [blame] | 362 | /* we only care about the first child device so we return 1 */ |
| 363 | static int child_iter(struct device *dev, void *data) |
| 364 | { |
| 365 | struct scsi_device *sdev = to_scsi_device(dev); |
| 366 | |
| 367 | spi_dv_device(sdev); |
| 368 | return 1; |
| 369 | } |
| 370 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 371 | static ssize_t |
| 372 | store_spi_revalidate(struct class_device *cdev, const char *buf, size_t count) |
| 373 | { |
| 374 | struct scsi_target *starget = transport_class_to_starget(cdev); |
| 375 | |
gregkh@suse.de | 9a881f1 | 2005-03-25 15:52:00 -0800 | [diff] [blame] | 376 | device_for_each_child(&starget->dev, NULL, child_iter); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 377 | return count; |
| 378 | } |
| 379 | static CLASS_DEVICE_ATTR(revalidate, S_IWUSR, NULL, store_spi_revalidate); |
| 380 | |
| 381 | /* Translate the period into ns according to the current spec |
| 382 | * for SDTR/PPR messages */ |
Matthew Wilcox | ef72582 | 2005-12-15 16:22:01 -0500 | [diff] [blame] | 383 | static int period_to_str(char *buf, int period) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 384 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 385 | int len, picosec; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 386 | |
James Bottomley | 62a8612 | 2005-05-06 18:05:20 -0500 | [diff] [blame] | 387 | if (period < 0 || period > 0xff) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 388 | picosec = -1; |
James Bottomley | 62a8612 | 2005-05-06 18:05:20 -0500 | [diff] [blame] | 389 | } else if (period <= SPI_STATIC_PPR) { |
| 390 | picosec = ppr_to_ps[period]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 391 | } else { |
James Bottomley | 62a8612 | 2005-05-06 18:05:20 -0500 | [diff] [blame] | 392 | picosec = period * 4000; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 393 | } |
| 394 | |
| 395 | if (picosec == -1) { |
| 396 | len = sprintf(buf, "reserved"); |
| 397 | } else { |
| 398 | len = sprint_frac(buf, picosec, 1000); |
| 399 | } |
| 400 | |
Matthew Wilcox | ef72582 | 2005-12-15 16:22:01 -0500 | [diff] [blame] | 401 | return len; |
| 402 | } |
| 403 | |
| 404 | static ssize_t |
Matthew Wilcox | ea697e4 | 2006-02-07 08:01:02 -0700 | [diff] [blame] | 405 | show_spi_transport_period_helper(char *buf, int period) |
Matthew Wilcox | ef72582 | 2005-12-15 16:22:01 -0500 | [diff] [blame] | 406 | { |
| 407 | int len = period_to_str(buf, period); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 408 | buf[len++] = '\n'; |
| 409 | buf[len] = '\0'; |
| 410 | return len; |
| 411 | } |
| 412 | |
| 413 | static ssize_t |
James Bottomley | 62a8612 | 2005-05-06 18:05:20 -0500 | [diff] [blame] | 414 | store_spi_transport_period_helper(struct class_device *cdev, const char *buf, |
| 415 | size_t count, int *periodp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 416 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 417 | int j, picosec, period = -1; |
| 418 | char *endp; |
| 419 | |
| 420 | picosec = simple_strtoul(buf, &endp, 10) * 1000; |
| 421 | if (*endp == '.') { |
| 422 | int mult = 100; |
| 423 | do { |
| 424 | endp++; |
| 425 | if (!isdigit(*endp)) |
| 426 | break; |
| 427 | picosec += (*endp - '0') * mult; |
| 428 | mult /= 10; |
| 429 | } while (mult > 0); |
| 430 | } |
| 431 | |
| 432 | for (j = 0; j <= SPI_STATIC_PPR; j++) { |
| 433 | if (ppr_to_ps[j] < picosec) |
| 434 | continue; |
| 435 | period = j; |
| 436 | break; |
| 437 | } |
| 438 | |
| 439 | if (period == -1) |
| 440 | period = picosec / 4000; |
| 441 | |
| 442 | if (period > 0xff) |
| 443 | period = 0xff; |
| 444 | |
James Bottomley | 62a8612 | 2005-05-06 18:05:20 -0500 | [diff] [blame] | 445 | *periodp = period; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 446 | |
| 447 | return count; |
| 448 | } |
| 449 | |
James Bottomley | 62a8612 | 2005-05-06 18:05:20 -0500 | [diff] [blame] | 450 | static ssize_t |
| 451 | show_spi_transport_period(struct class_device *cdev, char *buf) |
| 452 | { |
| 453 | struct scsi_target *starget = transport_class_to_starget(cdev); |
| 454 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); |
| 455 | struct spi_internal *i = to_spi_internal(shost->transportt); |
| 456 | struct spi_transport_attrs *tp = |
| 457 | (struct spi_transport_attrs *)&starget->starget_data; |
| 458 | |
| 459 | if (i->f->get_period) |
| 460 | i->f->get_period(starget); |
| 461 | |
Matthew Wilcox | ea697e4 | 2006-02-07 08:01:02 -0700 | [diff] [blame] | 462 | return show_spi_transport_period_helper(buf, tp->period); |
James Bottomley | 62a8612 | 2005-05-06 18:05:20 -0500 | [diff] [blame] | 463 | } |
| 464 | |
| 465 | static ssize_t |
| 466 | store_spi_transport_period(struct class_device *cdev, const char *buf, |
| 467 | size_t count) |
| 468 | { |
| 469 | struct scsi_target *starget = transport_class_to_starget(cdev); |
| 470 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); |
| 471 | struct spi_internal *i = to_spi_internal(shost->transportt); |
| 472 | struct spi_transport_attrs *tp = |
| 473 | (struct spi_transport_attrs *)&starget->starget_data; |
| 474 | int period, retval; |
| 475 | |
| 476 | retval = store_spi_transport_period_helper(cdev, buf, count, &period); |
| 477 | |
| 478 | if (period < tp->min_period) |
| 479 | period = tp->min_period; |
| 480 | |
| 481 | i->f->set_period(starget, period); |
| 482 | |
| 483 | return retval; |
| 484 | } |
| 485 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 486 | static CLASS_DEVICE_ATTR(period, S_IRUGO | S_IWUSR, |
| 487 | show_spi_transport_period, |
| 488 | store_spi_transport_period); |
| 489 | |
James Bottomley | 62a8612 | 2005-05-06 18:05:20 -0500 | [diff] [blame] | 490 | static ssize_t |
| 491 | show_spi_transport_min_period(struct class_device *cdev, char *buf) |
| 492 | { |
| 493 | struct scsi_target *starget = transport_class_to_starget(cdev); |
| 494 | struct spi_transport_attrs *tp = |
| 495 | (struct spi_transport_attrs *)&starget->starget_data; |
| 496 | |
Matthew Wilcox | ea697e4 | 2006-02-07 08:01:02 -0700 | [diff] [blame] | 497 | return show_spi_transport_period_helper(buf, tp->min_period); |
James Bottomley | 62a8612 | 2005-05-06 18:05:20 -0500 | [diff] [blame] | 498 | } |
| 499 | |
| 500 | static ssize_t |
| 501 | store_spi_transport_min_period(struct class_device *cdev, const char *buf, |
| 502 | size_t count) |
| 503 | { |
| 504 | struct scsi_target *starget = transport_class_to_starget(cdev); |
| 505 | struct spi_transport_attrs *tp = |
| 506 | (struct spi_transport_attrs *)&starget->starget_data; |
| 507 | |
| 508 | return store_spi_transport_period_helper(cdev, buf, count, |
| 509 | &tp->min_period); |
| 510 | } |
| 511 | |
| 512 | |
| 513 | static CLASS_DEVICE_ATTR(min_period, S_IRUGO | S_IWUSR, |
| 514 | show_spi_transport_min_period, |
| 515 | store_spi_transport_min_period); |
| 516 | |
| 517 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 518 | static ssize_t show_spi_host_signalling(struct class_device *cdev, char *buf) |
| 519 | { |
| 520 | struct Scsi_Host *shost = transport_class_to_shost(cdev); |
| 521 | struct spi_internal *i = to_spi_internal(shost->transportt); |
| 522 | |
| 523 | if (i->f->get_signalling) |
| 524 | i->f->get_signalling(shost); |
| 525 | |
| 526 | return sprintf(buf, "%s\n", spi_signal_to_string(spi_signalling(shost))); |
| 527 | } |
| 528 | static ssize_t store_spi_host_signalling(struct class_device *cdev, |
| 529 | const char *buf, size_t count) |
| 530 | { |
| 531 | struct Scsi_Host *shost = transport_class_to_shost(cdev); |
| 532 | struct spi_internal *i = to_spi_internal(shost->transportt); |
| 533 | enum spi_signal_type type = spi_signal_to_value(buf); |
| 534 | |
| 535 | if (type != SPI_SIGNAL_UNKNOWN) |
| 536 | i->f->set_signalling(shost, type); |
| 537 | |
| 538 | return count; |
| 539 | } |
| 540 | static CLASS_DEVICE_ATTR(signalling, S_IRUGO | S_IWUSR, |
| 541 | show_spi_host_signalling, |
| 542 | store_spi_host_signalling); |
| 543 | |
| 544 | #define DV_SET(x, y) \ |
| 545 | if(i->f->set_##x) \ |
| 546 | i->f->set_##x(sdev->sdev_target, y) |
| 547 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 548 | enum spi_compare_returns { |
| 549 | SPI_COMPARE_SUCCESS, |
| 550 | SPI_COMPARE_FAILURE, |
| 551 | SPI_COMPARE_SKIP_TEST, |
| 552 | }; |
| 553 | |
| 554 | |
| 555 | /* This is for read/write Domain Validation: If the device supports |
| 556 | * an echo buffer, we do read/write tests to it */ |
| 557 | static enum spi_compare_returns |
James Bottomley | 33aa687 | 2005-08-28 11:31:14 -0500 | [diff] [blame] | 558 | spi_dv_device_echo_buffer(struct scsi_device *sdev, u8 *buffer, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 559 | u8 *ptr, const int retries) |
| 560 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 561 | int len = ptr - buffer; |
James Bottomley | 33aa687 | 2005-08-28 11:31:14 -0500 | [diff] [blame] | 562 | int j, k, r, result; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 563 | unsigned int pattern = 0x0000ffff; |
James Bottomley | 33aa687 | 2005-08-28 11:31:14 -0500 | [diff] [blame] | 564 | struct scsi_sense_hdr sshdr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 565 | |
| 566 | const char spi_write_buffer[] = { |
| 567 | WRITE_BUFFER, 0x0a, 0, 0, 0, 0, 0, len >> 8, len & 0xff, 0 |
| 568 | }; |
| 569 | const char spi_read_buffer[] = { |
| 570 | READ_BUFFER, 0x0a, 0, 0, 0, 0, 0, len >> 8, len & 0xff, 0 |
| 571 | }; |
| 572 | |
| 573 | /* set up the pattern buffer. Doesn't matter if we spill |
| 574 | * slightly beyond since that's where the read buffer is */ |
| 575 | for (j = 0; j < len; ) { |
| 576 | |
| 577 | /* fill the buffer with counting (test a) */ |
| 578 | for ( ; j < min(len, 32); j++) |
| 579 | buffer[j] = j; |
| 580 | k = j; |
| 581 | /* fill the buffer with alternating words of 0x0 and |
| 582 | * 0xffff (test b) */ |
| 583 | for ( ; j < min(len, k + 32); j += 2) { |
| 584 | u16 *word = (u16 *)&buffer[j]; |
| 585 | |
| 586 | *word = (j & 0x02) ? 0x0000 : 0xffff; |
| 587 | } |
| 588 | k = j; |
| 589 | /* fill with crosstalk (alternating 0x5555 0xaaa) |
| 590 | * (test c) */ |
| 591 | for ( ; j < min(len, k + 32); j += 2) { |
| 592 | u16 *word = (u16 *)&buffer[j]; |
| 593 | |
| 594 | *word = (j & 0x02) ? 0x5555 : 0xaaaa; |
| 595 | } |
| 596 | k = j; |
| 597 | /* fill with shifting bits (test d) */ |
| 598 | for ( ; j < min(len, k + 32); j += 4) { |
| 599 | u32 *word = (unsigned int *)&buffer[j]; |
| 600 | u32 roll = (pattern & 0x80000000) ? 1 : 0; |
| 601 | |
| 602 | *word = pattern; |
| 603 | pattern = (pattern << 1) | roll; |
| 604 | } |
| 605 | /* don't bother with random data (test e) */ |
| 606 | } |
| 607 | |
| 608 | for (r = 0; r < retries; r++) { |
James Bottomley | 33aa687 | 2005-08-28 11:31:14 -0500 | [diff] [blame] | 609 | result = spi_execute(sdev, spi_write_buffer, DMA_TO_DEVICE, |
| 610 | buffer, len, &sshdr); |
| 611 | if(result || !scsi_device_online(sdev)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 612 | |
| 613 | scsi_device_set_state(sdev, SDEV_QUIESCE); |
James Bottomley | 33aa687 | 2005-08-28 11:31:14 -0500 | [diff] [blame] | 614 | if (scsi_sense_valid(&sshdr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 615 | && sshdr.sense_key == ILLEGAL_REQUEST |
| 616 | /* INVALID FIELD IN CDB */ |
| 617 | && sshdr.asc == 0x24 && sshdr.ascq == 0x00) |
| 618 | /* This would mean that the drive lied |
| 619 | * to us about supporting an echo |
| 620 | * buffer (unfortunately some Western |
| 621 | * Digital drives do precisely this) |
| 622 | */ |
| 623 | return SPI_COMPARE_SKIP_TEST; |
| 624 | |
| 625 | |
James Bottomley | 9ccfc75 | 2005-10-02 11:45:08 -0500 | [diff] [blame] | 626 | sdev_printk(KERN_ERR, sdev, "Write Buffer failure %x\n", result); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 627 | return SPI_COMPARE_FAILURE; |
| 628 | } |
| 629 | |
| 630 | memset(ptr, 0, len); |
James Bottomley | 33aa687 | 2005-08-28 11:31:14 -0500 | [diff] [blame] | 631 | spi_execute(sdev, spi_read_buffer, DMA_FROM_DEVICE, |
| 632 | ptr, len, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 633 | scsi_device_set_state(sdev, SDEV_QUIESCE); |
| 634 | |
| 635 | if (memcmp(buffer, ptr, len) != 0) |
| 636 | return SPI_COMPARE_FAILURE; |
| 637 | } |
| 638 | return SPI_COMPARE_SUCCESS; |
| 639 | } |
| 640 | |
| 641 | /* This is for the simplest form of Domain Validation: a read test |
| 642 | * on the inquiry data from the device */ |
| 643 | static enum spi_compare_returns |
James Bottomley | 33aa687 | 2005-08-28 11:31:14 -0500 | [diff] [blame] | 644 | spi_dv_device_compare_inquiry(struct scsi_device *sdev, u8 *buffer, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 645 | u8 *ptr, const int retries) |
| 646 | { |
James Bottomley | 33aa687 | 2005-08-28 11:31:14 -0500 | [diff] [blame] | 647 | int r, result; |
| 648 | const int len = sdev->inquiry_len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 649 | const char spi_inquiry[] = { |
| 650 | INQUIRY, 0, 0, 0, len, 0 |
| 651 | }; |
| 652 | |
| 653 | for (r = 0; r < retries; r++) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 654 | memset(ptr, 0, len); |
| 655 | |
James Bottomley | 33aa687 | 2005-08-28 11:31:14 -0500 | [diff] [blame] | 656 | result = spi_execute(sdev, spi_inquiry, DMA_FROM_DEVICE, |
| 657 | ptr, len, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 658 | |
James Bottomley | 33aa687 | 2005-08-28 11:31:14 -0500 | [diff] [blame] | 659 | if(result || !scsi_device_online(sdev)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 660 | scsi_device_set_state(sdev, SDEV_QUIESCE); |
| 661 | return SPI_COMPARE_FAILURE; |
| 662 | } |
| 663 | |
| 664 | /* If we don't have the inquiry data already, the |
| 665 | * first read gets it */ |
| 666 | if (ptr == buffer) { |
| 667 | ptr += len; |
| 668 | --r; |
| 669 | continue; |
| 670 | } |
| 671 | |
| 672 | if (memcmp(buffer, ptr, len) != 0) |
| 673 | /* failure */ |
| 674 | return SPI_COMPARE_FAILURE; |
| 675 | } |
| 676 | return SPI_COMPARE_SUCCESS; |
| 677 | } |
| 678 | |
| 679 | static enum spi_compare_returns |
James Bottomley | 33aa687 | 2005-08-28 11:31:14 -0500 | [diff] [blame] | 680 | spi_dv_retrain(struct scsi_device *sdev, u8 *buffer, u8 *ptr, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 681 | enum spi_compare_returns |
James Bottomley | 33aa687 | 2005-08-28 11:31:14 -0500 | [diff] [blame] | 682 | (*compare_fn)(struct scsi_device *, u8 *, u8 *, int)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 683 | { |
James Bottomley | 33aa687 | 2005-08-28 11:31:14 -0500 | [diff] [blame] | 684 | struct spi_internal *i = to_spi_internal(sdev->host->transportt); |
James Bottomley | 9a8bc9b | 2005-05-31 18:35:39 -0500 | [diff] [blame] | 685 | struct scsi_target *starget = sdev->sdev_target; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 686 | int period = 0, prevperiod = 0; |
| 687 | enum spi_compare_returns retval; |
| 688 | |
| 689 | |
| 690 | for (;;) { |
| 691 | int newperiod; |
James Bottomley | 33aa687 | 2005-08-28 11:31:14 -0500 | [diff] [blame] | 692 | retval = compare_fn(sdev, buffer, ptr, DV_LOOPS); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 693 | |
| 694 | if (retval == SPI_COMPARE_SUCCESS |
| 695 | || retval == SPI_COMPARE_SKIP_TEST) |
| 696 | break; |
| 697 | |
| 698 | /* OK, retrain, fallback */ |
James Bottomley | 9a8bc9b | 2005-05-31 18:35:39 -0500 | [diff] [blame] | 699 | if (i->f->get_iu) |
| 700 | i->f->get_iu(starget); |
| 701 | if (i->f->get_qas) |
| 702 | i->f->get_qas(starget); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 703 | if (i->f->get_period) |
| 704 | i->f->get_period(sdev->sdev_target); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 705 | |
James Bottomley | 9a8bc9b | 2005-05-31 18:35:39 -0500 | [diff] [blame] | 706 | /* Here's the fallback sequence; first try turning off |
| 707 | * IU, then QAS (if we can control them), then finally |
| 708 | * fall down the periods */ |
| 709 | if (i->f->set_iu && spi_iu(starget)) { |
James Bottomley | 9ccfc75 | 2005-10-02 11:45:08 -0500 | [diff] [blame] | 710 | starget_printk(KERN_ERR, starget, "Domain Validation Disabing Information Units\n"); |
James Bottomley | 9a8bc9b | 2005-05-31 18:35:39 -0500 | [diff] [blame] | 711 | DV_SET(iu, 0); |
| 712 | } else if (i->f->set_qas && spi_qas(starget)) { |
James Bottomley | 9ccfc75 | 2005-10-02 11:45:08 -0500 | [diff] [blame] | 713 | starget_printk(KERN_ERR, starget, "Domain Validation Disabing Quick Arbitration and Selection\n"); |
James Bottomley | 9a8bc9b | 2005-05-31 18:35:39 -0500 | [diff] [blame] | 714 | DV_SET(qas, 0); |
| 715 | } else { |
| 716 | newperiod = spi_period(starget); |
| 717 | period = newperiod > period ? newperiod : period; |
| 718 | if (period < 0x0d) |
| 719 | period++; |
| 720 | else |
| 721 | period += period >> 1; |
| 722 | |
| 723 | if (unlikely(period > 0xff || period == prevperiod)) { |
| 724 | /* Total failure; set to async and return */ |
James Bottomley | 9ccfc75 | 2005-10-02 11:45:08 -0500 | [diff] [blame] | 725 | starget_printk(KERN_ERR, starget, "Domain Validation Failure, dropping back to Asynchronous\n"); |
James Bottomley | 9a8bc9b | 2005-05-31 18:35:39 -0500 | [diff] [blame] | 726 | DV_SET(offset, 0); |
| 727 | return SPI_COMPARE_FAILURE; |
| 728 | } |
James Bottomley | 9ccfc75 | 2005-10-02 11:45:08 -0500 | [diff] [blame] | 729 | starget_printk(KERN_ERR, starget, "Domain Validation detected failure, dropping back\n"); |
James Bottomley | 9a8bc9b | 2005-05-31 18:35:39 -0500 | [diff] [blame] | 730 | DV_SET(period, period); |
| 731 | prevperiod = period; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 732 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 733 | } |
| 734 | return retval; |
| 735 | } |
| 736 | |
| 737 | static int |
James Bottomley | 33aa687 | 2005-08-28 11:31:14 -0500 | [diff] [blame] | 738 | spi_dv_device_get_echo_buffer(struct scsi_device *sdev, u8 *buffer) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 739 | { |
James Bottomley | 33aa687 | 2005-08-28 11:31:14 -0500 | [diff] [blame] | 740 | int l, result; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 741 | |
| 742 | /* first off do a test unit ready. This can error out |
| 743 | * because of reservations or some other reason. If it |
| 744 | * fails, the device won't let us write to the echo buffer |
| 745 | * so just return failure */ |
| 746 | |
| 747 | const char spi_test_unit_ready[] = { |
| 748 | TEST_UNIT_READY, 0, 0, 0, 0, 0 |
| 749 | }; |
| 750 | |
| 751 | const char spi_read_buffer_descriptor[] = { |
| 752 | READ_BUFFER, 0x0b, 0, 0, 0, 0, 0, 0, 4, 0 |
| 753 | }; |
| 754 | |
| 755 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 756 | /* We send a set of three TURs to clear any outstanding |
| 757 | * unit attention conditions if they exist (Otherwise the |
| 758 | * buffer tests won't be happy). If the TUR still fails |
| 759 | * (reservation conflict, device not ready, etc) just |
| 760 | * skip the write tests */ |
| 761 | for (l = 0; ; l++) { |
James Bottomley | 33aa687 | 2005-08-28 11:31:14 -0500 | [diff] [blame] | 762 | result = spi_execute(sdev, spi_test_unit_ready, DMA_NONE, |
| 763 | NULL, 0, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 764 | |
James Bottomley | 33aa687 | 2005-08-28 11:31:14 -0500 | [diff] [blame] | 765 | if(result) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 766 | if(l >= 3) |
| 767 | return 0; |
| 768 | } else { |
| 769 | /* TUR succeeded */ |
| 770 | break; |
| 771 | } |
| 772 | } |
| 773 | |
James Bottomley | 33aa687 | 2005-08-28 11:31:14 -0500 | [diff] [blame] | 774 | result = spi_execute(sdev, spi_read_buffer_descriptor, |
| 775 | DMA_FROM_DEVICE, buffer, 4, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 776 | |
James Bottomley | 33aa687 | 2005-08-28 11:31:14 -0500 | [diff] [blame] | 777 | if (result) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 778 | /* Device has no echo buffer */ |
| 779 | return 0; |
| 780 | |
| 781 | return buffer[3] + ((buffer[2] & 0x1f) << 8); |
| 782 | } |
| 783 | |
| 784 | static void |
James Bottomley | 33aa687 | 2005-08-28 11:31:14 -0500 | [diff] [blame] | 785 | spi_dv_device_internal(struct scsi_device *sdev, u8 *buffer) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 786 | { |
James Bottomley | 33aa687 | 2005-08-28 11:31:14 -0500 | [diff] [blame] | 787 | struct spi_internal *i = to_spi_internal(sdev->host->transportt); |
James Bottomley | 62a8612 | 2005-05-06 18:05:20 -0500 | [diff] [blame] | 788 | struct scsi_target *starget = sdev->sdev_target; |
James Bottomley | 60eef25 | 2006-06-10 10:51:23 -0500 | [diff] [blame] | 789 | struct Scsi_Host *shost = sdev->host; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 790 | int len = sdev->inquiry_len; |
| 791 | /* first set us up for narrow async */ |
| 792 | DV_SET(offset, 0); |
| 793 | DV_SET(width, 0); |
| 794 | |
James Bottomley | 33aa687 | 2005-08-28 11:31:14 -0500 | [diff] [blame] | 795 | if (spi_dv_device_compare_inquiry(sdev, buffer, buffer, DV_LOOPS) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 796 | != SPI_COMPARE_SUCCESS) { |
James Bottomley | 9ccfc75 | 2005-10-02 11:45:08 -0500 | [diff] [blame] | 797 | starget_printk(KERN_ERR, starget, "Domain Validation Initial Inquiry Failed\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 798 | /* FIXME: should probably offline the device here? */ |
| 799 | return; |
| 800 | } |
| 801 | |
| 802 | /* test width */ |
James Bottomley | eb1dd68 | 2005-07-02 12:22:01 -0400 | [diff] [blame] | 803 | if (i->f->set_width && spi_max_width(starget) && |
| 804 | scsi_device_wide(sdev)) { |
James Bottomley | 9a8bc9b | 2005-05-31 18:35:39 -0500 | [diff] [blame] | 805 | i->f->set_width(starget, 1); |
James Bottomley | 62a8612 | 2005-05-06 18:05:20 -0500 | [diff] [blame] | 806 | |
James Bottomley | 33aa687 | 2005-08-28 11:31:14 -0500 | [diff] [blame] | 807 | if (spi_dv_device_compare_inquiry(sdev, buffer, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 808 | buffer + len, |
| 809 | DV_LOOPS) |
| 810 | != SPI_COMPARE_SUCCESS) { |
James Bottomley | 9ccfc75 | 2005-10-02 11:45:08 -0500 | [diff] [blame] | 811 | starget_printk(KERN_ERR, starget, "Wide Transfers Fail\n"); |
James Bottomley | 9a8bc9b | 2005-05-31 18:35:39 -0500 | [diff] [blame] | 812 | i->f->set_width(starget, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 813 | } |
| 814 | } |
| 815 | |
| 816 | if (!i->f->set_period) |
| 817 | return; |
| 818 | |
| 819 | /* device can't handle synchronous */ |
James Bottomley | eb1dd68 | 2005-07-02 12:22:01 -0400 | [diff] [blame] | 820 | if (!scsi_device_sync(sdev) && !scsi_device_dt(sdev)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 821 | return; |
| 822 | |
James Bottomley | 349cd7c | 2005-11-28 15:41:58 -0600 | [diff] [blame] | 823 | /* len == -1 is the signal that we need to ascertain the |
| 824 | * presence of an echo buffer before trying to use it. len == |
| 825 | * 0 means we don't have an echo buffer */ |
| 826 | len = -1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 827 | |
| 828 | retry: |
| 829 | |
| 830 | /* now set up to the maximum */ |
James Bottomley | 62a8612 | 2005-05-06 18:05:20 -0500 | [diff] [blame] | 831 | DV_SET(offset, spi_max_offset(starget)); |
| 832 | DV_SET(period, spi_min_period(starget)); |
James Bottomley | 9a8bc9b | 2005-05-31 18:35:39 -0500 | [diff] [blame] | 833 | /* try QAS requests; this should be harmless to set if the |
| 834 | * target supports it */ |
James Bottomley | dfdc58b | 2006-09-20 12:00:18 -0400 | [diff] [blame] | 835 | if (scsi_device_qas(sdev)) { |
James Bottomley | eb1dd68 | 2005-07-02 12:22:01 -0400 | [diff] [blame] | 836 | DV_SET(qas, 1); |
James Bottomley | dfdc58b | 2006-09-20 12:00:18 -0400 | [diff] [blame] | 837 | } else { |
| 838 | DV_SET(qas, 0); |
| 839 | } |
| 840 | |
| 841 | if (scsi_device_ius(sdev) && spi_min_period(starget) < 9) { |
| 842 | /* This u320 (or u640). Set IU transfers */ |
James Bottomley | eb1dd68 | 2005-07-02 12:22:01 -0400 | [diff] [blame] | 843 | DV_SET(iu, 1); |
James Bottomley | dfdc58b | 2006-09-20 12:00:18 -0400 | [diff] [blame] | 844 | /* Then set the optional parameters */ |
James Bottomley | 9a8bc9b | 2005-05-31 18:35:39 -0500 | [diff] [blame] | 845 | DV_SET(rd_strm, 1); |
| 846 | DV_SET(wr_flow, 1); |
| 847 | DV_SET(rti, 1); |
| 848 | if (spi_min_period(starget) == 8) |
| 849 | DV_SET(pcomp_en, 1); |
James Bottomley | dfdc58b | 2006-09-20 12:00:18 -0400 | [diff] [blame] | 850 | } else { |
| 851 | DV_SET(iu, 0); |
James Bottomley | 9a8bc9b | 2005-05-31 18:35:39 -0500 | [diff] [blame] | 852 | } |
James Bottomley | dfdc58b | 2006-09-20 12:00:18 -0400 | [diff] [blame] | 853 | |
James Bottomley | 60eef25 | 2006-06-10 10:51:23 -0500 | [diff] [blame] | 854 | /* now that we've done all this, actually check the bus |
| 855 | * signal type (if known). Some devices are stupid on |
| 856 | * a SE bus and still claim they can try LVD only settings */ |
| 857 | if (i->f->get_signalling) |
| 858 | i->f->get_signalling(shost); |
| 859 | if (spi_signalling(shost) == SPI_SIGNAL_SE || |
James Bottomley | dfdc58b | 2006-09-20 12:00:18 -0400 | [diff] [blame] | 860 | spi_signalling(shost) == SPI_SIGNAL_HVD || |
| 861 | !scsi_device_dt(sdev)) { |
James Bottomley | 60eef25 | 2006-06-10 10:51:23 -0500 | [diff] [blame] | 862 | DV_SET(dt, 0); |
James Bottomley | dfdc58b | 2006-09-20 12:00:18 -0400 | [diff] [blame] | 863 | } else { |
| 864 | DV_SET(dt, 1); |
| 865 | } |
James Bottomley | 349cd7c | 2005-11-28 15:41:58 -0600 | [diff] [blame] | 866 | /* Do the read only INQUIRY tests */ |
| 867 | spi_dv_retrain(sdev, buffer, buffer + sdev->inquiry_len, |
| 868 | spi_dv_device_compare_inquiry); |
| 869 | /* See if we actually managed to negotiate and sustain DT */ |
| 870 | if (i->f->get_dt) |
| 871 | i->f->get_dt(starget); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 872 | |
James Bottomley | 349cd7c | 2005-11-28 15:41:58 -0600 | [diff] [blame] | 873 | /* see if the device has an echo buffer. If it does we can do |
| 874 | * the SPI pattern write tests. Because of some broken |
| 875 | * devices, we *only* try this on a device that has actually |
| 876 | * negotiated DT */ |
| 877 | |
| 878 | if (len == -1 && spi_dt(starget)) |
| 879 | len = spi_dv_device_get_echo_buffer(sdev, buffer); |
| 880 | |
| 881 | if (len <= 0) { |
James Bottomley | 9ccfc75 | 2005-10-02 11:45:08 -0500 | [diff] [blame] | 882 | starget_printk(KERN_INFO, starget, "Domain Validation skipping write tests\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 883 | return; |
| 884 | } |
| 885 | |
| 886 | if (len > SPI_MAX_ECHO_BUFFER_SIZE) { |
James Bottomley | 9ccfc75 | 2005-10-02 11:45:08 -0500 | [diff] [blame] | 887 | starget_printk(KERN_WARNING, starget, "Echo buffer size %d is too big, trimming to %d\n", len, SPI_MAX_ECHO_BUFFER_SIZE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 888 | len = SPI_MAX_ECHO_BUFFER_SIZE; |
| 889 | } |
| 890 | |
James Bottomley | 33aa687 | 2005-08-28 11:31:14 -0500 | [diff] [blame] | 891 | if (spi_dv_retrain(sdev, buffer, buffer + len, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 892 | spi_dv_device_echo_buffer) |
| 893 | == SPI_COMPARE_SKIP_TEST) { |
| 894 | /* OK, the stupid drive can't do a write echo buffer |
| 895 | * test after all, fall back to the read tests */ |
| 896 | len = 0; |
| 897 | goto retry; |
| 898 | } |
| 899 | } |
| 900 | |
| 901 | |
| 902 | /** spi_dv_device - Do Domain Validation on the device |
| 903 | * @sdev: scsi device to validate |
| 904 | * |
| 905 | * Performs the domain validation on the given device in the |
| 906 | * current execution thread. Since DV operations may sleep, |
| 907 | * the current thread must have user context. Also no SCSI |
| 908 | * related locks that would deadlock I/O issued by the DV may |
| 909 | * be held. |
| 910 | */ |
| 911 | void |
| 912 | spi_dv_device(struct scsi_device *sdev) |
| 913 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 914 | struct scsi_target *starget = sdev->sdev_target; |
| 915 | u8 *buffer; |
| 916 | const int len = SPI_MAX_ECHO_BUFFER_SIZE*2; |
| 917 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 918 | if (unlikely(scsi_device_get(sdev))) |
James Bottomley | 33aa687 | 2005-08-28 11:31:14 -0500 | [diff] [blame] | 919 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 920 | |
James Bottomley | dfdc58b | 2006-09-20 12:00:18 -0400 | [diff] [blame] | 921 | if (unlikely(spi_dv_in_progress(starget))) |
| 922 | return; |
| 923 | spi_dv_in_progress(starget) = 1; |
| 924 | |
Jes Sorensen | 24669f75 | 2006-01-16 10:31:18 -0500 | [diff] [blame] | 925 | buffer = kzalloc(len, GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 926 | |
| 927 | if (unlikely(!buffer)) |
| 928 | goto out_put; |
| 929 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 930 | /* We need to verify that the actual device will quiesce; the |
| 931 | * later target quiesce is just a nice to have */ |
| 932 | if (unlikely(scsi_device_quiesce(sdev))) |
| 933 | goto out_free; |
| 934 | |
| 935 | scsi_target_quiesce(starget); |
| 936 | |
| 937 | spi_dv_pending(starget) = 1; |
Jes Sorensen | d158d26 | 2006-01-13 16:05:44 -0800 | [diff] [blame] | 938 | mutex_lock(&spi_dv_mutex(starget)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 939 | |
James Bottomley | 9ccfc75 | 2005-10-02 11:45:08 -0500 | [diff] [blame] | 940 | starget_printk(KERN_INFO, starget, "Beginning Domain Validation\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 941 | |
James Bottomley | 33aa687 | 2005-08-28 11:31:14 -0500 | [diff] [blame] | 942 | spi_dv_device_internal(sdev, buffer); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 943 | |
James Bottomley | 9ccfc75 | 2005-10-02 11:45:08 -0500 | [diff] [blame] | 944 | starget_printk(KERN_INFO, starget, "Ending Domain Validation\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 945 | |
Jes Sorensen | d158d26 | 2006-01-13 16:05:44 -0800 | [diff] [blame] | 946 | mutex_unlock(&spi_dv_mutex(starget)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 947 | spi_dv_pending(starget) = 0; |
| 948 | |
| 949 | scsi_target_resume(starget); |
| 950 | |
| 951 | spi_initial_dv(starget) = 1; |
| 952 | |
| 953 | out_free: |
| 954 | kfree(buffer); |
| 955 | out_put: |
James Bottomley | dfdc58b | 2006-09-20 12:00:18 -0400 | [diff] [blame] | 956 | spi_dv_in_progress(starget) = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 957 | scsi_device_put(sdev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 958 | } |
| 959 | EXPORT_SYMBOL(spi_dv_device); |
| 960 | |
| 961 | struct work_queue_wrapper { |
| 962 | struct work_struct work; |
| 963 | struct scsi_device *sdev; |
| 964 | }; |
| 965 | |
| 966 | static void |
| 967 | spi_dv_device_work_wrapper(void *data) |
| 968 | { |
| 969 | struct work_queue_wrapper *wqw = (struct work_queue_wrapper *)data; |
| 970 | struct scsi_device *sdev = wqw->sdev; |
| 971 | |
| 972 | kfree(wqw); |
| 973 | spi_dv_device(sdev); |
| 974 | spi_dv_pending(sdev->sdev_target) = 0; |
| 975 | scsi_device_put(sdev); |
| 976 | } |
| 977 | |
| 978 | |
| 979 | /** |
| 980 | * spi_schedule_dv_device - schedule domain validation to occur on the device |
| 981 | * @sdev: The device to validate |
| 982 | * |
| 983 | * Identical to spi_dv_device() above, except that the DV will be |
| 984 | * scheduled to occur in a workqueue later. All memory allocations |
| 985 | * are atomic, so may be called from any context including those holding |
| 986 | * SCSI locks. |
| 987 | */ |
| 988 | void |
| 989 | spi_schedule_dv_device(struct scsi_device *sdev) |
| 990 | { |
| 991 | struct work_queue_wrapper *wqw = |
| 992 | kmalloc(sizeof(struct work_queue_wrapper), GFP_ATOMIC); |
| 993 | |
| 994 | if (unlikely(!wqw)) |
| 995 | return; |
| 996 | |
| 997 | if (unlikely(spi_dv_pending(sdev->sdev_target))) { |
| 998 | kfree(wqw); |
| 999 | return; |
| 1000 | } |
| 1001 | /* Set pending early (dv_device doesn't check it, only sets it) */ |
| 1002 | spi_dv_pending(sdev->sdev_target) = 1; |
| 1003 | if (unlikely(scsi_device_get(sdev))) { |
| 1004 | kfree(wqw); |
| 1005 | spi_dv_pending(sdev->sdev_target) = 0; |
| 1006 | return; |
| 1007 | } |
| 1008 | |
| 1009 | INIT_WORK(&wqw->work, spi_dv_device_work_wrapper, wqw); |
| 1010 | wqw->sdev = sdev; |
| 1011 | |
| 1012 | schedule_work(&wqw->work); |
| 1013 | } |
| 1014 | EXPORT_SYMBOL(spi_schedule_dv_device); |
| 1015 | |
| 1016 | /** |
| 1017 | * spi_display_xfer_agreement - Print the current target transfer agreement |
| 1018 | * @starget: The target for which to display the agreement |
| 1019 | * |
| 1020 | * Each SPI port is required to maintain a transfer agreement for each |
| 1021 | * other port on the bus. This function prints a one-line summary of |
| 1022 | * the current agreement; more detailed information is available in sysfs. |
| 1023 | */ |
| 1024 | void spi_display_xfer_agreement(struct scsi_target *starget) |
| 1025 | { |
| 1026 | struct spi_transport_attrs *tp; |
| 1027 | tp = (struct spi_transport_attrs *)&starget->starget_data; |
| 1028 | |
| 1029 | if (tp->offset > 0 && tp->period > 0) { |
| 1030 | unsigned int picosec, kb100; |
| 1031 | char *scsi = "FAST-?"; |
| 1032 | char tmp[8]; |
| 1033 | |
| 1034 | if (tp->period <= SPI_STATIC_PPR) { |
| 1035 | picosec = ppr_to_ps[tp->period]; |
| 1036 | switch (tp->period) { |
| 1037 | case 7: scsi = "FAST-320"; break; |
| 1038 | case 8: scsi = "FAST-160"; break; |
| 1039 | case 9: scsi = "FAST-80"; break; |
| 1040 | case 10: |
| 1041 | case 11: scsi = "FAST-40"; break; |
| 1042 | case 12: scsi = "FAST-20"; break; |
| 1043 | } |
| 1044 | } else { |
| 1045 | picosec = tp->period * 4000; |
| 1046 | if (tp->period < 25) |
| 1047 | scsi = "FAST-20"; |
| 1048 | else if (tp->period < 50) |
| 1049 | scsi = "FAST-10"; |
| 1050 | else |
| 1051 | scsi = "FAST-5"; |
| 1052 | } |
| 1053 | |
| 1054 | kb100 = (10000000 + picosec / 2) / picosec; |
| 1055 | if (tp->width) |
| 1056 | kb100 *= 2; |
| 1057 | sprint_frac(tmp, picosec, 1000); |
| 1058 | |
| 1059 | dev_info(&starget->dev, |
James Bottomley | d872ebe | 2005-08-03 15:43:52 -0500 | [diff] [blame] | 1060 | "%s %sSCSI %d.%d MB/s %s%s%s%s%s%s%s%s (%s ns, offset %d)\n", |
| 1061 | scsi, tp->width ? "WIDE " : "", kb100/10, kb100 % 10, |
| 1062 | tp->dt ? "DT" : "ST", |
| 1063 | tp->iu ? " IU" : "", |
| 1064 | tp->qas ? " QAS" : "", |
| 1065 | tp->rd_strm ? " RDSTRM" : "", |
| 1066 | tp->rti ? " RTI" : "", |
| 1067 | tp->wr_flow ? " WRFLOW" : "", |
| 1068 | tp->pcomp_en ? " PCOMP" : "", |
| 1069 | tp->hold_mcs ? " HMCS" : "", |
| 1070 | tmp, tp->offset); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1071 | } else { |
Matthew Wilcox | 493ff4e | 2005-11-17 11:13:43 -0700 | [diff] [blame] | 1072 | dev_info(&starget->dev, "%sasynchronous\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1073 | tp->width ? "wide " : ""); |
| 1074 | } |
| 1075 | } |
| 1076 | EXPORT_SYMBOL(spi_display_xfer_agreement); |
| 1077 | |
Matthew Wilcox | 6ea3c0b | 2006-02-07 07:54:46 -0700 | [diff] [blame] | 1078 | int spi_populate_width_msg(unsigned char *msg, int width) |
| 1079 | { |
| 1080 | msg[0] = EXTENDED_MESSAGE; |
| 1081 | msg[1] = 2; |
| 1082 | msg[2] = EXTENDED_WDTR; |
| 1083 | msg[3] = width; |
| 1084 | return 4; |
| 1085 | } |
James Bottomley | 38e14f8 | 2006-02-17 14:58:47 -0800 | [diff] [blame] | 1086 | EXPORT_SYMBOL_GPL(spi_populate_width_msg); |
Matthew Wilcox | 6ea3c0b | 2006-02-07 07:54:46 -0700 | [diff] [blame] | 1087 | |
| 1088 | int spi_populate_sync_msg(unsigned char *msg, int period, int offset) |
| 1089 | { |
| 1090 | msg[0] = EXTENDED_MESSAGE; |
| 1091 | msg[1] = 3; |
| 1092 | msg[2] = EXTENDED_SDTR; |
| 1093 | msg[3] = period; |
| 1094 | msg[4] = offset; |
| 1095 | return 5; |
| 1096 | } |
James Bottomley | 38e14f8 | 2006-02-17 14:58:47 -0800 | [diff] [blame] | 1097 | EXPORT_SYMBOL_GPL(spi_populate_sync_msg); |
Matthew Wilcox | 6ea3c0b | 2006-02-07 07:54:46 -0700 | [diff] [blame] | 1098 | |
| 1099 | int spi_populate_ppr_msg(unsigned char *msg, int period, int offset, |
| 1100 | int width, int options) |
| 1101 | { |
| 1102 | msg[0] = EXTENDED_MESSAGE; |
| 1103 | msg[1] = 6; |
| 1104 | msg[2] = EXTENDED_PPR; |
| 1105 | msg[3] = period; |
| 1106 | msg[4] = 0; |
| 1107 | msg[5] = offset; |
| 1108 | msg[6] = width; |
| 1109 | msg[7] = options; |
| 1110 | return 8; |
| 1111 | } |
James Bottomley | 38e14f8 | 2006-02-17 14:58:47 -0800 | [diff] [blame] | 1112 | EXPORT_SYMBOL_GPL(spi_populate_ppr_msg); |
Matthew Wilcox | 6ea3c0b | 2006-02-07 07:54:46 -0700 | [diff] [blame] | 1113 | |
Matthew Wilcox | 410ca5c | 2005-12-15 16:22:01 -0500 | [diff] [blame] | 1114 | #ifdef CONFIG_SCSI_CONSTANTS |
| 1115 | static const char * const one_byte_msgs[] = { |
Matthew Wilcox | 72df0eb | 2006-03-10 07:18:22 -0700 | [diff] [blame] | 1116 | /* 0x00 */ "Task Complete", NULL /* Extended Message */, "Save Pointers", |
Matthew Wilcox | 410ca5c | 2005-12-15 16:22:01 -0500 | [diff] [blame] | 1117 | /* 0x03 */ "Restore Pointers", "Disconnect", "Initiator Error", |
Matthew Wilcox | 72df0eb | 2006-03-10 07:18:22 -0700 | [diff] [blame] | 1118 | /* 0x06 */ "Abort Task Set", "Message Reject", "Nop", "Message Parity Error", |
Matthew Wilcox | 410ca5c | 2005-12-15 16:22:01 -0500 | [diff] [blame] | 1119 | /* 0x0a */ "Linked Command Complete", "Linked Command Complete w/flag", |
Matthew Wilcox | 72df0eb | 2006-03-10 07:18:22 -0700 | [diff] [blame] | 1120 | /* 0x0c */ "Target Reset", "Abort Task", "Clear Task Set", |
| 1121 | /* 0x0f */ "Initiate Recovery", "Release Recovery", |
| 1122 | /* 0x11 */ "Terminate Process", "Continue Task", "Target Transfer Disable", |
| 1123 | /* 0x14 */ NULL, NULL, "Clear ACA", "LUN Reset" |
Matthew Wilcox | 410ca5c | 2005-12-15 16:22:01 -0500 | [diff] [blame] | 1124 | }; |
Matthew Wilcox | 410ca5c | 2005-12-15 16:22:01 -0500 | [diff] [blame] | 1125 | |
| 1126 | static const char * const two_byte_msgs[] = { |
Matthew Wilcox | 4797215 | 2005-12-15 16:22:01 -0500 | [diff] [blame] | 1127 | /* 0x20 */ "Simple Queue Tag", "Head of Queue Tag", "Ordered Queue Tag", |
Matthew Wilcox | 72df0eb | 2006-03-10 07:18:22 -0700 | [diff] [blame] | 1128 | /* 0x23 */ "Ignore Wide Residue", "ACA" |
Matthew Wilcox | 410ca5c | 2005-12-15 16:22:01 -0500 | [diff] [blame] | 1129 | }; |
Matthew Wilcox | 410ca5c | 2005-12-15 16:22:01 -0500 | [diff] [blame] | 1130 | |
| 1131 | static const char * const extended_msgs[] = { |
| 1132 | /* 0x00 */ "Modify Data Pointer", "Synchronous Data Transfer Request", |
Matthew Wilcox | ef72582 | 2005-12-15 16:22:01 -0500 | [diff] [blame] | 1133 | /* 0x02 */ "SCSI-I Extended Identify", "Wide Data Transfer Request", |
Matthew Wilcox | fc25307 | 2006-02-18 20:52:31 -0700 | [diff] [blame] | 1134 | /* 0x04 */ "Parallel Protocol Request", "Modify Bidirectional Data Pointer" |
Matthew Wilcox | 410ca5c | 2005-12-15 16:22:01 -0500 | [diff] [blame] | 1135 | }; |
Matthew Wilcox | 410ca5c | 2005-12-15 16:22:01 -0500 | [diff] [blame] | 1136 | |
Adrian Bunk | bdd70f2 | 2006-01-05 23:39:18 +0100 | [diff] [blame] | 1137 | static void print_nego(const unsigned char *msg, int per, int off, int width) |
Matthew Wilcox | ef72582 | 2005-12-15 16:22:01 -0500 | [diff] [blame] | 1138 | { |
| 1139 | if (per) { |
| 1140 | char buf[20]; |
| 1141 | period_to_str(buf, msg[per]); |
| 1142 | printk("period = %s ns ", buf); |
| 1143 | } |
| 1144 | |
| 1145 | if (off) |
| 1146 | printk("offset = %d ", msg[off]); |
| 1147 | if (width) |
| 1148 | printk("width = %d ", 8 << msg[width]); |
| 1149 | } |
Matthew Wilcox | 410ca5c | 2005-12-15 16:22:01 -0500 | [diff] [blame] | 1150 | |
Matthew Wilcox | fc25307 | 2006-02-18 20:52:31 -0700 | [diff] [blame] | 1151 | static void print_ptr(const unsigned char *msg, int msb, const char *desc) |
| 1152 | { |
| 1153 | int ptr = (msg[msb] << 24) | (msg[msb+1] << 16) | (msg[msb+2] << 8) | |
| 1154 | msg[msb+3]; |
| 1155 | printk("%s = %d ", desc, ptr); |
| 1156 | } |
| 1157 | |
Matthew Wilcox | 1abfd37 | 2005-12-15 16:22:01 -0500 | [diff] [blame] | 1158 | int spi_print_msg(const unsigned char *msg) |
Matthew Wilcox | 410ca5c | 2005-12-15 16:22:01 -0500 | [diff] [blame] | 1159 | { |
Matthew Wilcox | 72df0eb | 2006-03-10 07:18:22 -0700 | [diff] [blame] | 1160 | int len = 1, i; |
Matthew Wilcox | 410ca5c | 2005-12-15 16:22:01 -0500 | [diff] [blame] | 1161 | if (msg[0] == EXTENDED_MESSAGE) { |
Matthew Wilcox | fc25307 | 2006-02-18 20:52:31 -0700 | [diff] [blame] | 1162 | len = 2 + msg[1]; |
| 1163 | if (len == 2) |
| 1164 | len += 256; |
Matthew Wilcox | b32aaff | 2005-12-15 16:22:01 -0500 | [diff] [blame] | 1165 | if (msg[2] < ARRAY_SIZE(extended_msgs)) |
Matthew Wilcox | 410ca5c | 2005-12-15 16:22:01 -0500 | [diff] [blame] | 1166 | printk ("%s ", extended_msgs[msg[2]]); |
| 1167 | else |
| 1168 | printk ("Extended Message, reserved code (0x%02x) ", |
| 1169 | (int) msg[2]); |
| 1170 | switch (msg[2]) { |
| 1171 | case EXTENDED_MODIFY_DATA_POINTER: |
Matthew Wilcox | fc25307 | 2006-02-18 20:52:31 -0700 | [diff] [blame] | 1172 | print_ptr(msg, 3, "pointer"); |
Matthew Wilcox | 410ca5c | 2005-12-15 16:22:01 -0500 | [diff] [blame] | 1173 | break; |
| 1174 | case EXTENDED_SDTR: |
Matthew Wilcox | ef72582 | 2005-12-15 16:22:01 -0500 | [diff] [blame] | 1175 | print_nego(msg, 3, 4, 0); |
Matthew Wilcox | 410ca5c | 2005-12-15 16:22:01 -0500 | [diff] [blame] | 1176 | break; |
| 1177 | case EXTENDED_WDTR: |
Matthew Wilcox | ef72582 | 2005-12-15 16:22:01 -0500 | [diff] [blame] | 1178 | print_nego(msg, 0, 0, 3); |
| 1179 | break; |
| 1180 | case EXTENDED_PPR: |
| 1181 | print_nego(msg, 3, 5, 6); |
Matthew Wilcox | 410ca5c | 2005-12-15 16:22:01 -0500 | [diff] [blame] | 1182 | break; |
Matthew Wilcox | fc25307 | 2006-02-18 20:52:31 -0700 | [diff] [blame] | 1183 | case EXTENDED_MODIFY_BIDI_DATA_PTR: |
| 1184 | print_ptr(msg, 3, "out"); |
| 1185 | print_ptr(msg, 7, "in"); |
| 1186 | break; |
Matthew Wilcox | 410ca5c | 2005-12-15 16:22:01 -0500 | [diff] [blame] | 1187 | default: |
| 1188 | for (i = 2; i < len; ++i) |
| 1189 | printk("%02x ", msg[i]); |
| 1190 | } |
| 1191 | /* Identify */ |
| 1192 | } else if (msg[0] & 0x80) { |
| 1193 | printk("Identify disconnect %sallowed %s %d ", |
| 1194 | (msg[0] & 0x40) ? "" : "not ", |
| 1195 | (msg[0] & 0x20) ? "target routine" : "lun", |
| 1196 | msg[0] & 0x7); |
Matthew Wilcox | 410ca5c | 2005-12-15 16:22:01 -0500 | [diff] [blame] | 1197 | /* Normal One byte */ |
| 1198 | } else if (msg[0] < 0x1f) { |
Matthew Wilcox | 72df0eb | 2006-03-10 07:18:22 -0700 | [diff] [blame] | 1199 | if (msg[0] < ARRAY_SIZE(one_byte_msgs) && one_byte_msgs[msg[0]]) |
Matthew Wilcox | e24d873 | 2006-02-07 08:05:26 -0700 | [diff] [blame] | 1200 | printk("%s ", one_byte_msgs[msg[0]]); |
Matthew Wilcox | 410ca5c | 2005-12-15 16:22:01 -0500 | [diff] [blame] | 1201 | else |
| 1202 | printk("reserved (%02x) ", msg[0]); |
Matthew Wilcox | 72df0eb | 2006-03-10 07:18:22 -0700 | [diff] [blame] | 1203 | } else if (msg[0] == 0x55) { |
| 1204 | printk("QAS Request "); |
Matthew Wilcox | 410ca5c | 2005-12-15 16:22:01 -0500 | [diff] [blame] | 1205 | /* Two byte */ |
| 1206 | } else if (msg[0] <= 0x2f) { |
Matthew Wilcox | b32aaff | 2005-12-15 16:22:01 -0500 | [diff] [blame] | 1207 | if ((msg[0] - 0x20) < ARRAY_SIZE(two_byte_msgs)) |
Matthew Wilcox | 410ca5c | 2005-12-15 16:22:01 -0500 | [diff] [blame] | 1208 | printk("%s %02x ", two_byte_msgs[msg[0] - 0x20], |
| 1209 | msg[1]); |
| 1210 | else |
| 1211 | printk("reserved two byte (%02x %02x) ", |
| 1212 | msg[0], msg[1]); |
| 1213 | len = 2; |
| 1214 | } else |
Matthew Wilcox | e24d873 | 2006-02-07 08:05:26 -0700 | [diff] [blame] | 1215 | printk("reserved "); |
Matthew Wilcox | 410ca5c | 2005-12-15 16:22:01 -0500 | [diff] [blame] | 1216 | return len; |
| 1217 | } |
Matthew Wilcox | 1abfd37 | 2005-12-15 16:22:01 -0500 | [diff] [blame] | 1218 | EXPORT_SYMBOL(spi_print_msg); |
Matthew Wilcox | 410ca5c | 2005-12-15 16:22:01 -0500 | [diff] [blame] | 1219 | |
| 1220 | #else /* ifndef CONFIG_SCSI_CONSTANTS */ |
| 1221 | |
Matthew Wilcox | 1abfd37 | 2005-12-15 16:22:01 -0500 | [diff] [blame] | 1222 | int spi_print_msg(const unsigned char *msg) |
Matthew Wilcox | 410ca5c | 2005-12-15 16:22:01 -0500 | [diff] [blame] | 1223 | { |
Matthew Wilcox | 72df0eb | 2006-03-10 07:18:22 -0700 | [diff] [blame] | 1224 | int len = 1, i; |
Matthew Wilcox | 410ca5c | 2005-12-15 16:22:01 -0500 | [diff] [blame] | 1225 | |
| 1226 | if (msg[0] == EXTENDED_MESSAGE) { |
Matthew Wilcox | fc25307 | 2006-02-18 20:52:31 -0700 | [diff] [blame] | 1227 | len = 2 + msg[1]; |
| 1228 | if (len == 2) |
| 1229 | len += 256; |
Matthew Wilcox | 410ca5c | 2005-12-15 16:22:01 -0500 | [diff] [blame] | 1230 | for (i = 0; i < len; ++i) |
| 1231 | printk("%02x ", msg[i]); |
| 1232 | /* Identify */ |
| 1233 | } else if (msg[0] & 0x80) { |
| 1234 | printk("%02x ", msg[0]); |
Matthew Wilcox | 410ca5c | 2005-12-15 16:22:01 -0500 | [diff] [blame] | 1235 | /* Normal One byte */ |
James Bottomley | 597705a | 2006-03-12 09:54:19 -0600 | [diff] [blame] | 1236 | } else if ((msg[0] < 0x1f) || (msg[0] == 0x55)) { |
Matthew Wilcox | 410ca5c | 2005-12-15 16:22:01 -0500 | [diff] [blame] | 1237 | printk("%02x ", msg[0]); |
Matthew Wilcox | 410ca5c | 2005-12-15 16:22:01 -0500 | [diff] [blame] | 1238 | /* Two byte */ |
| 1239 | } else if (msg[0] <= 0x2f) { |
| 1240 | printk("%02x %02x", msg[0], msg[1]); |
| 1241 | len = 2; |
| 1242 | } else |
| 1243 | printk("%02x ", msg[0]); |
| 1244 | return len; |
| 1245 | } |
Matthew Wilcox | 1abfd37 | 2005-12-15 16:22:01 -0500 | [diff] [blame] | 1246 | EXPORT_SYMBOL(spi_print_msg); |
Matthew Wilcox | 410ca5c | 2005-12-15 16:22:01 -0500 | [diff] [blame] | 1247 | #endif /* ! CONFIG_SCSI_CONSTANTS */ |
| 1248 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1249 | #define SETUP_ATTRIBUTE(field) \ |
| 1250 | i->private_attrs[count] = class_device_attr_##field; \ |
| 1251 | if (!i->f->set_##field) { \ |
| 1252 | i->private_attrs[count].attr.mode = S_IRUGO; \ |
| 1253 | i->private_attrs[count].store = NULL; \ |
| 1254 | } \ |
| 1255 | i->attrs[count] = &i->private_attrs[count]; \ |
| 1256 | if (i->f->show_##field) \ |
| 1257 | count++ |
| 1258 | |
James Bottomley | 62a8612 | 2005-05-06 18:05:20 -0500 | [diff] [blame] | 1259 | #define SETUP_RELATED_ATTRIBUTE(field, rel_field) \ |
| 1260 | i->private_attrs[count] = class_device_attr_##field; \ |
| 1261 | if (!i->f->set_##rel_field) { \ |
| 1262 | i->private_attrs[count].attr.mode = S_IRUGO; \ |
| 1263 | i->private_attrs[count].store = NULL; \ |
| 1264 | } \ |
| 1265 | i->attrs[count] = &i->private_attrs[count]; \ |
| 1266 | if (i->f->show_##rel_field) \ |
| 1267 | count++ |
| 1268 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1269 | #define SETUP_HOST_ATTRIBUTE(field) \ |
| 1270 | i->private_host_attrs[count] = class_device_attr_##field; \ |
| 1271 | if (!i->f->set_##field) { \ |
| 1272 | i->private_host_attrs[count].attr.mode = S_IRUGO; \ |
| 1273 | i->private_host_attrs[count].store = NULL; \ |
| 1274 | } \ |
| 1275 | i->host_attrs[count] = &i->private_host_attrs[count]; \ |
| 1276 | count++ |
| 1277 | |
| 1278 | static int spi_device_match(struct attribute_container *cont, |
| 1279 | struct device *dev) |
| 1280 | { |
| 1281 | struct scsi_device *sdev; |
| 1282 | struct Scsi_Host *shost; |
James Bottomley | 10c1b88 | 2005-08-14 14:34:06 -0500 | [diff] [blame] | 1283 | struct spi_internal *i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1284 | |
| 1285 | if (!scsi_is_sdev_device(dev)) |
| 1286 | return 0; |
| 1287 | |
| 1288 | sdev = to_scsi_device(dev); |
| 1289 | shost = sdev->host; |
| 1290 | if (!shost->transportt || shost->transportt->host_attrs.ac.class |
| 1291 | != &spi_host_class.class) |
| 1292 | return 0; |
| 1293 | /* Note: this class has no device attributes, so it has |
| 1294 | * no per-HBA allocation and thus we don't need to distinguish |
| 1295 | * the attribute containers for the device */ |
James Bottomley | 10c1b88 | 2005-08-14 14:34:06 -0500 | [diff] [blame] | 1296 | i = to_spi_internal(shost->transportt); |
| 1297 | if (i->f->deny_binding && i->f->deny_binding(sdev->sdev_target)) |
| 1298 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1299 | return 1; |
| 1300 | } |
| 1301 | |
| 1302 | static int spi_target_match(struct attribute_container *cont, |
| 1303 | struct device *dev) |
| 1304 | { |
| 1305 | struct Scsi_Host *shost; |
James Bottomley | 10c1b88 | 2005-08-14 14:34:06 -0500 | [diff] [blame] | 1306 | struct scsi_target *starget; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1307 | struct spi_internal *i; |
| 1308 | |
| 1309 | if (!scsi_is_target_device(dev)) |
| 1310 | return 0; |
| 1311 | |
| 1312 | shost = dev_to_shost(dev->parent); |
| 1313 | if (!shost->transportt || shost->transportt->host_attrs.ac.class |
| 1314 | != &spi_host_class.class) |
| 1315 | return 0; |
| 1316 | |
| 1317 | i = to_spi_internal(shost->transportt); |
James Bottomley | 10c1b88 | 2005-08-14 14:34:06 -0500 | [diff] [blame] | 1318 | starget = to_scsi_target(dev); |
| 1319 | |
| 1320 | if (i->f->deny_binding && i->f->deny_binding(starget)) |
| 1321 | return 0; |
| 1322 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1323 | return &i->t.target_attrs.ac == cont; |
| 1324 | } |
| 1325 | |
| 1326 | static DECLARE_TRANSPORT_CLASS(spi_transport_class, |
| 1327 | "spi_transport", |
| 1328 | spi_setup_transport_attrs, |
| 1329 | NULL, |
| 1330 | NULL); |
| 1331 | |
| 1332 | static DECLARE_ANON_TRANSPORT_CLASS(spi_device_class, |
| 1333 | spi_device_match, |
| 1334 | spi_device_configure); |
| 1335 | |
| 1336 | struct scsi_transport_template * |
| 1337 | spi_attach_transport(struct spi_function_template *ft) |
| 1338 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1339 | int count = 0; |
Jes Sorensen | 24669f75 | 2006-01-16 10:31:18 -0500 | [diff] [blame] | 1340 | struct spi_internal *i = kzalloc(sizeof(struct spi_internal), |
| 1341 | GFP_KERNEL); |
| 1342 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1343 | if (unlikely(!i)) |
| 1344 | return NULL; |
| 1345 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1346 | i->t.target_attrs.ac.class = &spi_transport_class.class; |
| 1347 | i->t.target_attrs.ac.attrs = &i->attrs[0]; |
| 1348 | i->t.target_attrs.ac.match = spi_target_match; |
| 1349 | transport_container_register(&i->t.target_attrs); |
| 1350 | i->t.target_size = sizeof(struct spi_transport_attrs); |
| 1351 | i->t.host_attrs.ac.class = &spi_host_class.class; |
| 1352 | i->t.host_attrs.ac.attrs = &i->host_attrs[0]; |
| 1353 | i->t.host_attrs.ac.match = spi_host_match; |
| 1354 | transport_container_register(&i->t.host_attrs); |
| 1355 | i->t.host_size = sizeof(struct spi_host_attrs); |
| 1356 | i->f = ft; |
| 1357 | |
| 1358 | SETUP_ATTRIBUTE(period); |
James Bottomley | 62a8612 | 2005-05-06 18:05:20 -0500 | [diff] [blame] | 1359 | SETUP_RELATED_ATTRIBUTE(min_period, period); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1360 | SETUP_ATTRIBUTE(offset); |
James Bottomley | 62a8612 | 2005-05-06 18:05:20 -0500 | [diff] [blame] | 1361 | SETUP_RELATED_ATTRIBUTE(max_offset, offset); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1362 | SETUP_ATTRIBUTE(width); |
James Bottomley | 62a8612 | 2005-05-06 18:05:20 -0500 | [diff] [blame] | 1363 | SETUP_RELATED_ATTRIBUTE(max_width, width); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1364 | SETUP_ATTRIBUTE(iu); |
| 1365 | SETUP_ATTRIBUTE(dt); |
| 1366 | SETUP_ATTRIBUTE(qas); |
| 1367 | SETUP_ATTRIBUTE(wr_flow); |
| 1368 | SETUP_ATTRIBUTE(rd_strm); |
| 1369 | SETUP_ATTRIBUTE(rti); |
| 1370 | SETUP_ATTRIBUTE(pcomp_en); |
James Bottomley | d872ebe | 2005-08-03 15:43:52 -0500 | [diff] [blame] | 1371 | SETUP_ATTRIBUTE(hold_mcs); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1372 | |
| 1373 | /* if you add an attribute but forget to increase SPI_NUM_ATTRS |
| 1374 | * this bug will trigger */ |
| 1375 | BUG_ON(count > SPI_NUM_ATTRS); |
| 1376 | |
| 1377 | i->attrs[count++] = &class_device_attr_revalidate; |
| 1378 | |
| 1379 | i->attrs[count] = NULL; |
| 1380 | |
| 1381 | count = 0; |
| 1382 | SETUP_HOST_ATTRIBUTE(signalling); |
| 1383 | |
| 1384 | BUG_ON(count > SPI_HOST_ATTRS); |
| 1385 | |
| 1386 | i->host_attrs[count] = NULL; |
| 1387 | |
| 1388 | return &i->t; |
| 1389 | } |
| 1390 | EXPORT_SYMBOL(spi_attach_transport); |
| 1391 | |
| 1392 | void spi_release_transport(struct scsi_transport_template *t) |
| 1393 | { |
| 1394 | struct spi_internal *i = to_spi_internal(t); |
| 1395 | |
| 1396 | transport_container_unregister(&i->t.target_attrs); |
| 1397 | transport_container_unregister(&i->t.host_attrs); |
| 1398 | |
| 1399 | kfree(i); |
| 1400 | } |
| 1401 | EXPORT_SYMBOL(spi_release_transport); |
| 1402 | |
| 1403 | static __init int spi_transport_init(void) |
| 1404 | { |
| 1405 | int error = transport_class_register(&spi_transport_class); |
| 1406 | if (error) |
| 1407 | return error; |
| 1408 | error = anon_transport_class_register(&spi_device_class); |
| 1409 | return transport_class_register(&spi_host_class); |
| 1410 | } |
| 1411 | |
| 1412 | static void __exit spi_transport_exit(void) |
| 1413 | { |
| 1414 | transport_class_unregister(&spi_transport_class); |
| 1415 | anon_transport_class_unregister(&spi_device_class); |
| 1416 | transport_class_unregister(&spi_host_class); |
| 1417 | } |
| 1418 | |
| 1419 | MODULE_AUTHOR("Martin Hicks"); |
| 1420 | MODULE_DESCRIPTION("SPI Transport Attributes"); |
| 1421 | MODULE_LICENSE("GPL"); |
| 1422 | |
| 1423 | module_init(spi_transport_init); |
| 1424 | module_exit(spi_transport_exit); |