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SHM_UNLOCK: fix Unevictable pages stranded after swap
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / memstick / core / mspro_block.c
blob9729b92fbfdd3150280328a2be3d5872beacd618
1 /*
2 * Sony MemoryStick Pro storage support
3 *
4 * Copyright (C) 2007 Alex Dubov <oakad@yahoo.com>
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
9 *
10 * Special thanks to Carlos Corbacho for providing various MemoryStick cards
11 * that made this driver possible.
12 *
13 */
14
15 #include <linux/blkdev.h>
16 #include <linux/idr.h>
17 #include <linux/hdreg.h>
18 #include <linux/kthread.h>
19 #include <linux/delay.h>
20 #include <linux/slab.h>
21 #include <linux/mutex.h>
22 #include <linux/memstick.h>
23 #include <linux/module.h>
24
25 #define DRIVER_NAME "mspro_block"
26
27 static int major;
28 module_param(major, int, 0644);
29
30 #define MSPRO_BLOCK_MAX_SEGS 32
31 #define MSPRO_BLOCK_MAX_PAGES ((2 << 16) - 1)
32
33 #define MSPRO_BLOCK_SIGNATURE 0xa5c3
34 #define MSPRO_BLOCK_MAX_ATTRIBUTES 41
35
36 #define MSPRO_BLOCK_PART_SHIFT 3
37
38 enum {
39 MSPRO_BLOCK_ID_SYSINFO = 0x10,
40 MSPRO_BLOCK_ID_MODELNAME = 0x15,
41 MSPRO_BLOCK_ID_MBR = 0x20,
42 MSPRO_BLOCK_ID_PBR16 = 0x21,
43 MSPRO_BLOCK_ID_PBR32 = 0x22,
44 MSPRO_BLOCK_ID_SPECFILEVALUES1 = 0x25,
45 MSPRO_BLOCK_ID_SPECFILEVALUES2 = 0x26,
46 MSPRO_BLOCK_ID_DEVINFO = 0x30
47 };
48
49 struct mspro_sys_attr {
50 size_t size;
51 void *data;
52 unsigned char id;
53 char name[32];
54 struct device_attribute dev_attr;
55 };
56
57 struct mspro_attr_entry {
58 __be32 address;
59 __be32 size;
60 unsigned char id;
61 unsigned char reserved[3];
62 } __attribute__((packed));
63
64 struct mspro_attribute {
65 __be16 signature;
66 unsigned short version;
67 unsigned char count;
68 unsigned char reserved[11];
69 struct mspro_attr_entry entries[];
70 } __attribute__((packed));
71
72 struct mspro_sys_info {
73 unsigned char class;
74 unsigned char reserved0;
75 __be16 block_size;
76 __be16 block_count;
77 __be16 user_block_count;
78 __be16 page_size;
79 unsigned char reserved1[2];
80 unsigned char assembly_date[8];
81 __be32 serial_number;
82 unsigned char assembly_maker_code;
83 unsigned char assembly_model_code[3];
84 __be16 memory_maker_code;
85 __be16 memory_model_code;
86 unsigned char reserved2[4];
87 unsigned char vcc;
88 unsigned char vpp;
89 __be16 controller_number;
90 __be16 controller_function;
91 __be16 start_sector;
92 __be16 unit_size;
93 unsigned char ms_sub_class;
94 unsigned char reserved3[4];
95 unsigned char interface_type;
96 __be16 controller_code;
97 unsigned char format_type;
98 unsigned char reserved4;
99 unsigned char device_type;
100 unsigned char reserved5[7];
101 unsigned char mspro_id[16];
102 unsigned char reserved6[16];
103 } __attribute__((packed));
104
105 struct mspro_mbr {
106 unsigned char boot_partition;
107 unsigned char start_head;
108 unsigned char start_sector;
109 unsigned char start_cylinder;
110 unsigned char partition_type;
111 unsigned char end_head;
112 unsigned char end_sector;
113 unsigned char end_cylinder;
114 unsigned int start_sectors;
115 unsigned int sectors_per_partition;
116 } __attribute__((packed));
117
118 struct mspro_specfile {
119 char name[8];
120 char ext[3];
121 unsigned char attr;
122 unsigned char reserved[10];
123 unsigned short time;
124 unsigned short date;
125 unsigned short cluster;
126 unsigned int size;
127 } __attribute__((packed));
128
129 struct mspro_devinfo {
130 __be16 cylinders;
131 __be16 heads;
132 __be16 bytes_per_track;
133 __be16 bytes_per_sector;
134 __be16 sectors_per_track;
135 unsigned char reserved[6];
136 } __attribute__((packed));
137
138 struct mspro_block_data {
139 struct memstick_dev *card;
140 unsigned int usage_count;
141 unsigned int caps;
142 struct gendisk *disk;
143 struct request_queue *queue;
144 struct request *block_req;
145 spinlock_t q_lock;
146
147 unsigned short page_size;
148 unsigned short cylinders;
149 unsigned short heads;
150 unsigned short sectors_per_track;
151
152 unsigned char system;
153 unsigned char read_only:1,
154 eject:1,
155 has_request:1,
156 data_dir:1,
157 active:1;
158 unsigned char transfer_cmd;
159
160 int (*mrq_handler)(struct memstick_dev *card,
161 struct memstick_request **mrq);
162
163
164 /* Default request setup function for data access method preferred by
165 * this host instance.
166 */
167 void (*setup_transfer)(struct memstick_dev *card,
168 u64 offset, size_t length);
169
170 struct attribute_group attr_group;
171
172 struct scatterlist req_sg[MSPRO_BLOCK_MAX_SEGS];
173 unsigned int seg_count;
174 unsigned int current_seg;
175 unsigned int current_page;
176 };
177
178 static DEFINE_IDR(mspro_block_disk_idr);
179 static DEFINE_MUTEX(mspro_block_disk_lock);
180
181 static int mspro_block_complete_req(struct memstick_dev *card, int error);
182
183 /*** Block device ***/
184
185 static int mspro_block_bd_open(struct block_device *bdev, fmode_t mode)
186 {
187 struct gendisk *disk = bdev->bd_disk;
188 struct mspro_block_data *msb = disk->private_data;
189 int rc = -ENXIO;
190
191 mutex_lock(&mspro_block_disk_lock);
192
193 if (msb && msb->card) {
194 msb->usage_count++;
195 if ((mode & FMODE_WRITE) && msb->read_only)
196 rc = -EROFS;
197 else
198 rc = 0;
199 }
200
201 mutex_unlock(&mspro_block_disk_lock);
202
203 return rc;
204 }
205
206
207 static int mspro_block_disk_release(struct gendisk *disk)
208 {
209 struct mspro_block_data *msb = disk->private_data;
210 int disk_id = MINOR(disk_devt(disk)) >> MSPRO_BLOCK_PART_SHIFT;
211
212 mutex_lock(&mspro_block_disk_lock);
213
214 if (msb) {
215 if (msb->usage_count)
216 msb->usage_count--;
217
218 if (!msb->usage_count) {
219 kfree(msb);
220 disk->private_data = NULL;
221 idr_remove(&mspro_block_disk_idr, disk_id);
222 put_disk(disk);
223 }
224 }
225
226 mutex_unlock(&mspro_block_disk_lock);
227
228 return 0;
229 }
230
231 static int mspro_block_bd_release(struct gendisk *disk, fmode_t mode)
232 {
233 return mspro_block_disk_release(disk);
234 }
235
236 static int mspro_block_bd_getgeo(struct block_device *bdev,
237 struct hd_geometry *geo)
238 {
239 struct mspro_block_data *msb = bdev->bd_disk->private_data;
240
241 geo->heads = msb->heads;
242 geo->sectors = msb->sectors_per_track;
243 geo->cylinders = msb->cylinders;
244
245 return 0;
246 }
247
248 static const struct block_device_operations ms_block_bdops = {
249 .open = mspro_block_bd_open,
250 .release = mspro_block_bd_release,
251 .getgeo = mspro_block_bd_getgeo,
252 .owner = THIS_MODULE
253 };
254
255 /*** Information ***/
256
257 static struct mspro_sys_attr *mspro_from_sysfs_attr(struct attribute *attr)
258 {
259 struct device_attribute *dev_attr
260 = container_of(attr, struct device_attribute, attr);
261 return container_of(dev_attr, struct mspro_sys_attr, dev_attr);
262 }
263
264 static const char *mspro_block_attr_name(unsigned char tag)
265 {
266 switch (tag) {
267 case MSPRO_BLOCK_ID_SYSINFO:
268 return "attr_sysinfo";
269 case MSPRO_BLOCK_ID_MODELNAME:
270 return "attr_modelname";
271 case MSPRO_BLOCK_ID_MBR:
272 return "attr_mbr";
273 case MSPRO_BLOCK_ID_PBR16:
274 return "attr_pbr16";
275 case MSPRO_BLOCK_ID_PBR32:
276 return "attr_pbr32";
277 case MSPRO_BLOCK_ID_SPECFILEVALUES1:
278 return "attr_specfilevalues1";
279 case MSPRO_BLOCK_ID_SPECFILEVALUES2:
280 return "attr_specfilevalues2";
281 case MSPRO_BLOCK_ID_DEVINFO:
282 return "attr_devinfo";
283 default:
284 return NULL;
285 };
286 }
287
288 typedef ssize_t (*sysfs_show_t)(struct device *dev,
289 struct device_attribute *attr,
290 char *buffer);
291
292 static ssize_t mspro_block_attr_show_default(struct device *dev,
293 struct device_attribute *attr,
294 char *buffer)
295 {
296 struct mspro_sys_attr *s_attr = container_of(attr,
297 struct mspro_sys_attr,
298 dev_attr);
299
300 ssize_t cnt, rc = 0;
301
302 for (cnt = 0; cnt < s_attr->size; cnt++) {
303 if (cnt && !(cnt % 16)) {
304 if (PAGE_SIZE - rc)
305 buffer[rc++] = '\n';
306 }
307
308 rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "%02x ",
309 ((unsigned char *)s_attr->data)[cnt]);
310 }
311 return rc;
312 }
313
314 static ssize_t mspro_block_attr_show_sysinfo(struct device *dev,
315 struct device_attribute *attr,
316 char *buffer)
317 {
318 struct mspro_sys_attr *x_attr = container_of(attr,
319 struct mspro_sys_attr,
320 dev_attr);
321 struct mspro_sys_info *x_sys = x_attr->data;
322 ssize_t rc = 0;
323 int date_tz = 0, date_tz_f = 0;
324
325 if (x_sys->assembly_date[0] > 0x80U) {
326 date_tz = (~x_sys->assembly_date[0]) + 1;
327 date_tz_f = date_tz & 3;
328 date_tz >>= 2;
329 date_tz = -date_tz;
330 date_tz_f *= 15;
331 } else if (x_sys->assembly_date[0] < 0x80U) {
332 date_tz = x_sys->assembly_date[0];
333 date_tz_f = date_tz & 3;
334 date_tz >>= 2;
335 date_tz_f *= 15;
336 }
337
338 rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "class: %x\n",
339 x_sys->class);
340 rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "block size: %x\n",
341 be16_to_cpu(x_sys->block_size));
342 rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "block count: %x\n",
343 be16_to_cpu(x_sys->block_count));
344 rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "user block count: %x\n",
345 be16_to_cpu(x_sys->user_block_count));
346 rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "page size: %x\n",
347 be16_to_cpu(x_sys->page_size));
348 rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "assembly date: "
349 "GMT%+d:%d %04u-%02u-%02u %02u:%02u:%02u\n",
350 date_tz, date_tz_f,
351 be16_to_cpup((__be16 *)&x_sys->assembly_date[1]),
352 x_sys->assembly_date[3], x_sys->assembly_date[4],
353 x_sys->assembly_date[5], x_sys->assembly_date[6],
354 x_sys->assembly_date[7]);
355 rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "serial number: %x\n",
356 be32_to_cpu(x_sys->serial_number));
357 rc += scnprintf(buffer + rc, PAGE_SIZE - rc,
358 "assembly maker code: %x\n",
359 x_sys->assembly_maker_code);
360 rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "assembly model code: "
361 "%02x%02x%02x\n", x_sys->assembly_model_code[0],
362 x_sys->assembly_model_code[1],
363 x_sys->assembly_model_code[2]);
364 rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "memory maker code: %x\n",
365 be16_to_cpu(x_sys->memory_maker_code));
366 rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "memory model code: %x\n",
367 be16_to_cpu(x_sys->memory_model_code));
368 rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "vcc: %x\n",
369 x_sys->vcc);
370 rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "vpp: %x\n",
371 x_sys->vpp);
372 rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "controller number: %x\n",
373 be16_to_cpu(x_sys->controller_number));
374 rc += scnprintf(buffer + rc, PAGE_SIZE - rc,
375 "controller function: %x\n",
376 be16_to_cpu(x_sys->controller_function));
377 rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "start sector: %x\n",
378 be16_to_cpu(x_sys->start_sector));
379 rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "unit size: %x\n",
380 be16_to_cpu(x_sys->unit_size));
381 rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "sub class: %x\n",
382 x_sys->ms_sub_class);
383 rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "interface type: %x\n",
384 x_sys->interface_type);
385 rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "controller code: %x\n",
386 be16_to_cpu(x_sys->controller_code));
387 rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "format type: %x\n",
388 x_sys->format_type);
389 rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "device type: %x\n",
390 x_sys->device_type);
391 rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "mspro id: %s\n",
392 x_sys->mspro_id);
393 return rc;
394 }
395
396 static ssize_t mspro_block_attr_show_modelname(struct device *dev,
397 struct device_attribute *attr,
398 char *buffer)
399 {
400 struct mspro_sys_attr *s_attr = container_of(attr,
401 struct mspro_sys_attr,
402 dev_attr);
403
404 return scnprintf(buffer, PAGE_SIZE, "%s", (char *)s_attr->data);
405 }
406
407 static ssize_t mspro_block_attr_show_mbr(struct device *dev,
408 struct device_attribute *attr,
409 char *buffer)
410 {
411 struct mspro_sys_attr *x_attr = container_of(attr,
412 struct mspro_sys_attr,
413 dev_attr);
414 struct mspro_mbr *x_mbr = x_attr->data;
415 ssize_t rc = 0;
416
417 rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "boot partition: %x\n",
418 x_mbr->boot_partition);
419 rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "start head: %x\n",
420 x_mbr->start_head);
421 rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "start sector: %x\n",
422 x_mbr->start_sector);
423 rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "start cylinder: %x\n",
424 x_mbr->start_cylinder);
425 rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "partition type: %x\n",
426 x_mbr->partition_type);
427 rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "end head: %x\n",
428 x_mbr->end_head);
429 rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "end sector: %x\n",
430 x_mbr->end_sector);
431 rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "end cylinder: %x\n",
432 x_mbr->end_cylinder);
433 rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "start sectors: %x\n",
434 x_mbr->start_sectors);
435 rc += scnprintf(buffer + rc, PAGE_SIZE - rc,
436 "sectors per partition: %x\n",
437 x_mbr->sectors_per_partition);
438 return rc;
439 }
440
441 static ssize_t mspro_block_attr_show_specfile(struct device *dev,
442 struct device_attribute *attr,
443 char *buffer)
444 {
445 struct mspro_sys_attr *x_attr = container_of(attr,
446 struct mspro_sys_attr,
447 dev_attr);
448 struct mspro_specfile *x_spfile = x_attr->data;
449 char name[9], ext[4];
450 ssize_t rc = 0;
451
452 memcpy(name, x_spfile->name, 8);
453 name[8] = 0;
454 memcpy(ext, x_spfile->ext, 3);
455 ext[3] = 0;
456
457 rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "name: %s\n", name);
458 rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "ext: %s\n", ext);
459 rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "attribute: %x\n",
460 x_spfile->attr);
461 rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "time: %d:%d:%d\n",
462 x_spfile->time >> 11,
463 (x_spfile->time >> 5) & 0x3f,
464 (x_spfile->time & 0x1f) * 2);
465 rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "date: %d-%d-%d\n",
466 (x_spfile->date >> 9) + 1980,
467 (x_spfile->date >> 5) & 0xf,
468 x_spfile->date & 0x1f);
469 rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "start cluster: %x\n",
470 x_spfile->cluster);
471 rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "size: %x\n",
472 x_spfile->size);
473 return rc;
474 }
475
476 static ssize_t mspro_block_attr_show_devinfo(struct device *dev,
477 struct device_attribute *attr,
478 char *buffer)
479 {
480 struct mspro_sys_attr *x_attr = container_of(attr,
481 struct mspro_sys_attr,
482 dev_attr);
483 struct mspro_devinfo *x_devinfo = x_attr->data;
484 ssize_t rc = 0;
485
486 rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "cylinders: %x\n",
487 be16_to_cpu(x_devinfo->cylinders));
488 rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "heads: %x\n",
489 be16_to_cpu(x_devinfo->heads));
490 rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "bytes per track: %x\n",
491 be16_to_cpu(x_devinfo->bytes_per_track));
492 rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "bytes per sector: %x\n",
493 be16_to_cpu(x_devinfo->bytes_per_sector));
494 rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "sectors per track: %x\n",
495 be16_to_cpu(x_devinfo->sectors_per_track));
496 return rc;
497 }
498
499 static sysfs_show_t mspro_block_attr_show(unsigned char tag)
500 {
501 switch (tag) {
502 case MSPRO_BLOCK_ID_SYSINFO:
503 return mspro_block_attr_show_sysinfo;
504 case MSPRO_BLOCK_ID_MODELNAME:
505 return mspro_block_attr_show_modelname;
506 case MSPRO_BLOCK_ID_MBR:
507 return mspro_block_attr_show_mbr;
508 case MSPRO_BLOCK_ID_SPECFILEVALUES1:
509 case MSPRO_BLOCK_ID_SPECFILEVALUES2:
510 return mspro_block_attr_show_specfile;
511 case MSPRO_BLOCK_ID_DEVINFO:
512 return mspro_block_attr_show_devinfo;
513 default:
514 return mspro_block_attr_show_default;
515 }
516 }
517
518 /*** Protocol handlers ***/
519
520 /*
521 * Functions prefixed with "h_" are protocol callbacks. They can be called from
522 * interrupt context. Return value of 0 means that request processing is still
523 * ongoing, while special error value of -EAGAIN means that current request is
524 * finished (and request processor should come back some time later).
525 */
526
527 static int h_mspro_block_req_init(struct memstick_dev *card,
528 struct memstick_request **mrq)
529 {
530 struct mspro_block_data *msb = memstick_get_drvdata(card);
531
532 *mrq = &card->current_mrq;
533 card->next_request = msb->mrq_handler;
534 return 0;
535 }
536
537 static int h_mspro_block_default(struct memstick_dev *card,
538 struct memstick_request **mrq)
539 {
540 return mspro_block_complete_req(card, (*mrq)->error);
541 }
542
543 static int h_mspro_block_default_bad(struct memstick_dev *card,
544 struct memstick_request **mrq)
545 {
546 return -ENXIO;
547 }
548
549 static int h_mspro_block_get_ro(struct memstick_dev *card,
550 struct memstick_request **mrq)
551 {
552 struct mspro_block_data *msb = memstick_get_drvdata(card);
553
554 if (!(*mrq)->error) {
555 if ((*mrq)->data[offsetof(struct ms_status_register, status0)]
556 & MEMSTICK_STATUS0_WP)
557 msb->read_only = 1;
558 else
559 msb->read_only = 0;
560 }
561
562 return mspro_block_complete_req(card, (*mrq)->error);
563 }
564
565 static int h_mspro_block_wait_for_ced(struct memstick_dev *card,
566 struct memstick_request **mrq)
567 {
568 dev_dbg(&card->dev, "wait for ced: value %x\n", (*mrq)->data[0]);
569
570 if (!(*mrq)->error) {
571 if ((*mrq)->data[0] & (MEMSTICK_INT_CMDNAK | MEMSTICK_INT_ERR))
572 (*mrq)->error = -EFAULT;
573 else if (!((*mrq)->data[0] & MEMSTICK_INT_CED))
574 return 0;
575 }
576
577 return mspro_block_complete_req(card, (*mrq)->error);
578 }
579
580 static int h_mspro_block_transfer_data(struct memstick_dev *card,
581 struct memstick_request **mrq)
582 {
583 struct mspro_block_data *msb = memstick_get_drvdata(card);
584 unsigned char t_val = 0;
585 struct scatterlist t_sg = { 0 };
586 size_t t_offset;
587
588 if ((*mrq)->error)
589 return mspro_block_complete_req(card, (*mrq)->error);
590
591 switch ((*mrq)->tpc) {
592 case MS_TPC_WRITE_REG:
593 memstick_init_req(*mrq, MS_TPC_SET_CMD, &msb->transfer_cmd, 1);
594 (*mrq)->need_card_int = 1;
595 return 0;
596 case MS_TPC_SET_CMD:
597 t_val = (*mrq)->int_reg;
598 memstick_init_req(*mrq, MS_TPC_GET_INT, NULL, 1);
599 if (msb->caps & MEMSTICK_CAP_AUTO_GET_INT)
600 goto has_int_reg;
601 return 0;
602 case MS_TPC_GET_INT:
603 t_val = (*mrq)->data[0];
604 has_int_reg:
605 if (t_val & (MEMSTICK_INT_CMDNAK | MEMSTICK_INT_ERR)) {
606 t_val = MSPRO_CMD_STOP;
607 memstick_init_req(*mrq, MS_TPC_SET_CMD, &t_val, 1);
608 card->next_request = h_mspro_block_default;
609 return 0;
610 }
611
612 if (msb->current_page
613 == (msb->req_sg[msb->current_seg].length
614 / msb->page_size)) {
615 msb->current_page = 0;
616 msb->current_seg++;
617
618 if (msb->current_seg == msb->seg_count) {
619 if (t_val & MEMSTICK_INT_CED) {
620 return mspro_block_complete_req(card,
621 0);
622 } else {
623 card->next_request
624 = h_mspro_block_wait_for_ced;
625 memstick_init_req(*mrq, MS_TPC_GET_INT,
626 NULL, 1);
627 return 0;
628 }
629 }
630 }
631
632 if (!(t_val & MEMSTICK_INT_BREQ)) {
633 memstick_init_req(*mrq, MS_TPC_GET_INT, NULL, 1);
634 return 0;
635 }
636
637 t_offset = msb->req_sg[msb->current_seg].offset;
638 t_offset += msb->current_page * msb->page_size;
639
640 sg_set_page(&t_sg,
641 nth_page(sg_page(&(msb->req_sg[msb->current_seg])),
642 t_offset >> PAGE_SHIFT),
643 msb->page_size, offset_in_page(t_offset));
644
645 memstick_init_req_sg(*mrq, msb->data_dir == READ
646 ? MS_TPC_READ_LONG_DATA
647 : MS_TPC_WRITE_LONG_DATA,
648 &t_sg);
649 (*mrq)->need_card_int = 1;
650 return 0;
651 case MS_TPC_READ_LONG_DATA:
652 case MS_TPC_WRITE_LONG_DATA:
653 msb->current_page++;
654 if (msb->caps & MEMSTICK_CAP_AUTO_GET_INT) {
655 t_val = (*mrq)->int_reg;
656 goto has_int_reg;
657 } else {
658 memstick_init_req(*mrq, MS_TPC_GET_INT, NULL, 1);
659 return 0;
660 }
661
662 default:
663 BUG();
664 }
665 }
666
667 /*** Transfer setup functions for different access methods. ***/
668
669 /** Setup data transfer request for SET_CMD TPC with arguments in card
670 * registers.
671 *
672 * @card Current media instance
673 * @offset Target data offset in bytes
674 * @length Required transfer length in bytes.
675 */
676 static void h_mspro_block_setup_cmd(struct memstick_dev *card, u64 offset,
677 size_t length)
678 {
679 struct mspro_block_data *msb = memstick_get_drvdata(card);
680 struct mspro_param_register param = {
681 .system = msb->system,
682 .data_count = cpu_to_be16((uint16_t)(length / msb->page_size)),
683 /* ISO C90 warning precludes direct initialization for now. */
684 .data_address = 0,
685 .tpc_param = 0
686 };
687
688 do_div(offset, msb->page_size);
689 param.data_address = cpu_to_be32((uint32_t)offset);
690
691 card->next_request = h_mspro_block_req_init;
692 msb->mrq_handler = h_mspro_block_transfer_data;
693 memstick_init_req(&card->current_mrq, MS_TPC_WRITE_REG,
694 &param, sizeof(param));
695 }
696
697 /*** Data transfer ***/
698
699 static int mspro_block_issue_req(struct memstick_dev *card, int chunk)
700 {
701 struct mspro_block_data *msb = memstick_get_drvdata(card);
702 u64 t_off;
703 unsigned int count;
704
705 try_again:
706 while (chunk) {
707 msb->current_page = 0;
708 msb->current_seg = 0;
709 msb->seg_count = blk_rq_map_sg(msb->block_req->q,
710 msb->block_req,
711 msb->req_sg);
712
713 if (!msb->seg_count) {
714 chunk = __blk_end_request_cur(msb->block_req, -ENOMEM);
715 continue;
716 }
717
718 t_off = blk_rq_pos(msb->block_req);
719 t_off <<= 9;
720 count = blk_rq_bytes(msb->block_req);
721
722 msb->setup_transfer(card, t_off, count);
723
724 msb->data_dir = rq_data_dir(msb->block_req);
725 msb->transfer_cmd = msb->data_dir == READ
726 ? MSPRO_CMD_READ_DATA
727 : MSPRO_CMD_WRITE_DATA;
728
729 memstick_new_req(card->host);
730 return 0;
731 }
732
733 dev_dbg(&card->dev, "blk_fetch\n");
734 msb->block_req = blk_fetch_request(msb->queue);
735 if (!msb->block_req) {
736 dev_dbg(&card->dev, "issue end\n");
737 return -EAGAIN;
738 }
739
740 dev_dbg(&card->dev, "trying again\n");
741 chunk = 1;
742 goto try_again;
743 }
744
745 static int mspro_block_complete_req(struct memstick_dev *card, int error)
746 {
747 struct mspro_block_data *msb = memstick_get_drvdata(card);
748 int chunk, cnt;
749 unsigned int t_len = 0;
750 unsigned long flags;
751
752 spin_lock_irqsave(&msb->q_lock, flags);
753 dev_dbg(&card->dev, "complete %d, %d\n", msb->has_request ? 1 : 0,
754 error);
755
756 if (msb->has_request) {
757 /* Nothing to do - not really an error */
758 if (error == -EAGAIN)
759 error = 0;
760
761 if (error || (card->current_mrq.tpc == MSPRO_CMD_STOP)) {
762 if (msb->data_dir == READ) {
763 for (cnt = 0; cnt < msb->current_seg; cnt++)
764 t_len += msb->req_sg[cnt].length
765 / msb->page_size;
766
767 if (msb->current_page)
768 t_len += msb->current_page - 1;
769
770 t_len *= msb->page_size;
771 }
772 } else
773 t_len = blk_rq_bytes(msb->block_req);
774
775 dev_dbg(&card->dev, "transferred %x (%d)\n", t_len, error);
776
777 if (error && !t_len)
778 t_len = blk_rq_cur_bytes(msb->block_req);
779
780 chunk = __blk_end_request(msb->block_req, error, t_len);
781
782 error = mspro_block_issue_req(card, chunk);
783
784 if (!error)
785 goto out;
786 else
787 msb->has_request = 0;
788 } else {
789 if (!error)
790 error = -EAGAIN;
791 }
792
793 card->next_request = h_mspro_block_default_bad;
794 complete_all(&card->mrq_complete);
795 out:
796 spin_unlock_irqrestore(&msb->q_lock, flags);
797 return error;
798 }
799
800 static void mspro_block_stop(struct memstick_dev *card)
801 {
802 struct mspro_block_data *msb = memstick_get_drvdata(card);
803 int rc = 0;
804 unsigned long flags;
805
806 while (1) {
807 spin_lock_irqsave(&msb->q_lock, flags);
808 if (!msb->has_request) {
809 blk_stop_queue(msb->queue);
810 rc = 1;
811 }
812 spin_unlock_irqrestore(&msb->q_lock, flags);
813
814 if (rc)
815 break;
816
817 wait_for_completion(&card->mrq_complete);
818 }
819 }
820
821 static void mspro_block_start(struct memstick_dev *card)
822 {
823 struct mspro_block_data *msb = memstick_get_drvdata(card);
824 unsigned long flags;
825
826 spin_lock_irqsave(&msb->q_lock, flags);
827 blk_start_queue(msb->queue);
828 spin_unlock_irqrestore(&msb->q_lock, flags);
829 }
830
831 static int mspro_block_prepare_req(struct request_queue *q, struct request *req)
832 {
833 if (req->cmd_type != REQ_TYPE_FS &&
834 req->cmd_type != REQ_TYPE_BLOCK_PC) {
835 blk_dump_rq_flags(req, "MSPro unsupported request");
836 return BLKPREP_KILL;
837 }
838
839 req->cmd_flags |= REQ_DONTPREP;
840
841 return BLKPREP_OK;
842 }
843
844 static void mspro_block_submit_req(struct request_queue *q)
845 {
846 struct memstick_dev *card = q->queuedata;
847 struct mspro_block_data *msb = memstick_get_drvdata(card);
848 struct request *req = NULL;
849
850 if (msb->has_request)
851 return;
852
853 if (msb->eject) {
854 while ((req = blk_fetch_request(q)) != NULL)
855 __blk_end_request_all(req, -ENODEV);
856
857 return;
858 }
859
860 msb->has_request = 1;
861 if (mspro_block_issue_req(card, 0))
862 msb->has_request = 0;
863 }
864
865 /*** Initialization ***/
866
867 static int mspro_block_wait_for_ced(struct memstick_dev *card)
868 {
869 struct mspro_block_data *msb = memstick_get_drvdata(card);
870
871 card->next_request = h_mspro_block_req_init;
872 msb->mrq_handler = h_mspro_block_wait_for_ced;
873 memstick_init_req(&card->current_mrq, MS_TPC_GET_INT, NULL, 1);
874 memstick_new_req(card->host);
875 wait_for_completion(&card->mrq_complete);
876 return card->current_mrq.error;
877 }
878
879 static int mspro_block_set_interface(struct memstick_dev *card,
880 unsigned char sys_reg)
881 {
882 struct memstick_host *host = card->host;
883 struct mspro_block_data *msb = memstick_get_drvdata(card);
884 struct mspro_param_register param = {
885 .system = sys_reg,
886 .data_count = 0,
887 .data_address = 0,
888 .tpc_param = 0
889 };
890
891 card->next_request = h_mspro_block_req_init;
892 msb->mrq_handler = h_mspro_block_default;
893 memstick_init_req(&card->current_mrq, MS_TPC_WRITE_REG, &param,
894 sizeof(param));
895 memstick_new_req(host);
896 wait_for_completion(&card->mrq_complete);
897 return card->current_mrq.error;
898 }
899
900 static int mspro_block_switch_interface(struct memstick_dev *card)
901 {
902 struct memstick_host *host = card->host;
903 struct mspro_block_data *msb = memstick_get_drvdata(card);
904 int rc = 0;
905
906 try_again:
907 if (msb->caps & MEMSTICK_CAP_PAR4)
908 rc = mspro_block_set_interface(card, MEMSTICK_SYS_PAR4);
909 else
910 return 0;
911
912 if (rc) {
913 printk(KERN_WARNING
914 "%s: could not switch to 4-bit mode, error %d\n",
915 dev_name(&card->dev), rc);
916 return 0;
917 }
918
919 msb->system = MEMSTICK_SYS_PAR4;
920 host->set_param(host, MEMSTICK_INTERFACE, MEMSTICK_PAR4);
921 printk(KERN_INFO "%s: switching to 4-bit parallel mode\n",
922 dev_name(&card->dev));
923
924 if (msb->caps & MEMSTICK_CAP_PAR8) {
925 rc = mspro_block_set_interface(card, MEMSTICK_SYS_PAR8);
926
927 if (!rc) {
928 msb->system = MEMSTICK_SYS_PAR8;
929 host->set_param(host, MEMSTICK_INTERFACE,
930 MEMSTICK_PAR8);
931 printk(KERN_INFO
932 "%s: switching to 8-bit parallel mode\n",
933 dev_name(&card->dev));
934 } else
935 printk(KERN_WARNING
936 "%s: could not switch to 8-bit mode, error %d\n",
937 dev_name(&card->dev), rc);
938 }
939
940 card->next_request = h_mspro_block_req_init;
941 msb->mrq_handler = h_mspro_block_default;
942 memstick_init_req(&card->current_mrq, MS_TPC_GET_INT, NULL, 1);
943 memstick_new_req(card->host);
944 wait_for_completion(&card->mrq_complete);
945 rc = card->current_mrq.error;
946
947 if (rc) {
948 printk(KERN_WARNING
949 "%s: interface error, trying to fall back to serial\n",
950 dev_name(&card->dev));
951 msb->system = MEMSTICK_SYS_SERIAL;
952 host->set_param(host, MEMSTICK_POWER, MEMSTICK_POWER_OFF);
953 msleep(10);
954 host->set_param(host, MEMSTICK_POWER, MEMSTICK_POWER_ON);
955 host->set_param(host, MEMSTICK_INTERFACE, MEMSTICK_SERIAL);
956
957 rc = memstick_set_rw_addr(card);
958 if (!rc)
959 rc = mspro_block_set_interface(card, msb->system);
960
961 if (!rc) {
962 msleep(150);
963 rc = mspro_block_wait_for_ced(card);
964 if (rc)
965 return rc;
966
967 if (msb->caps & MEMSTICK_CAP_PAR8) {
968 msb->caps &= ~MEMSTICK_CAP_PAR8;
969 goto try_again;
970 }
971 }
972 }
973 return rc;
974 }
975
976 /* Memory allocated for attributes by this function should be freed by
977 * mspro_block_data_clear, no matter if the initialization process succeeded
978 * or failed.
979 */
980 static int mspro_block_read_attributes(struct memstick_dev *card)
981 {
982 struct mspro_block_data *msb = memstick_get_drvdata(card);
983 struct mspro_attribute *attr = NULL;
984 struct mspro_sys_attr *s_attr = NULL;
985 unsigned char *buffer = NULL;
986 int cnt, rc, attr_count;
987 /* While normally physical device offsets, represented here by
988 * attr_offset and attr_len will be of large numeric types, we can be
989 * sure, that attributes are close enough to the beginning of the
990 * device, to save ourselves some trouble.
991 */
992 unsigned int addr, attr_offset = 0, attr_len = msb->page_size;
993
994 attr = kmalloc(msb->page_size, GFP_KERNEL);
995 if (!attr)
996 return -ENOMEM;
997
998 sg_init_one(&msb->req_sg[0], attr, msb->page_size);
999 msb->seg_count = 1;
1000 msb->current_seg = 0;
1001 msb->current_page = 0;
1002 msb->data_dir = READ;
1003 msb->transfer_cmd = MSPRO_CMD_READ_ATRB;
1004
1005 msb->setup_transfer(card, attr_offset, attr_len);
1006
1007 memstick_new_req(card->host);
1008 wait_for_completion(&card->mrq_complete);
1009 if (card->current_mrq.error) {
1010 rc = card->current_mrq.error;
1011 goto out_free_attr;
1012 }
1013
1014 if (be16_to_cpu(attr->signature) != MSPRO_BLOCK_SIGNATURE) {
1015 printk(KERN_ERR "%s: unrecognized device signature %x\n",
1016 dev_name(&card->dev), be16_to_cpu(attr->signature));
1017 rc = -ENODEV;
1018 goto out_free_attr;
1019 }
1020
1021 if (attr->count > MSPRO_BLOCK_MAX_ATTRIBUTES) {
1022 printk(KERN_WARNING "%s: way too many attribute entries\n",
1023 dev_name(&card->dev));
1024 attr_count = MSPRO_BLOCK_MAX_ATTRIBUTES;
1025 } else
1026 attr_count = attr->count;
1027
1028 msb->attr_group.attrs = kzalloc((attr_count + 1)
1029 * sizeof(struct attribute),
1030 GFP_KERNEL);
1031 if (!msb->attr_group.attrs) {
1032 rc = -ENOMEM;
1033 goto out_free_attr;
1034 }
1035 msb->attr_group.name = "media_attributes";
1036
1037 buffer = kmalloc(attr_len, GFP_KERNEL);
1038 if (!buffer) {
1039 rc = -ENOMEM;
1040 goto out_free_attr;
1041 }
1042 memcpy(buffer, (char *)attr, attr_len);
1043
1044 for (cnt = 0; cnt < attr_count; ++cnt) {
1045 s_attr = kzalloc(sizeof(struct mspro_sys_attr), GFP_KERNEL);
1046 if (!s_attr) {
1047 rc = -ENOMEM;
1048 goto out_free_buffer;
1049 }
1050
1051 msb->attr_group.attrs[cnt] = &s_attr->dev_attr.attr;
1052 addr = be32_to_cpu(attr->entries[cnt].address);
1053 s_attr->size = be32_to_cpu(attr->entries[cnt].size);
1054 dev_dbg(&card->dev, "adding attribute %d: id %x, address %x, "
1055 "size %zx\n", cnt, attr->entries[cnt].id, addr,
1056 s_attr->size);
1057 s_attr->id = attr->entries[cnt].id;
1058 if (mspro_block_attr_name(s_attr->id))
1059 snprintf(s_attr->name, sizeof(s_attr->name), "%s",
1060 mspro_block_attr_name(attr->entries[cnt].id));
1061 else
1062 snprintf(s_attr->name, sizeof(s_attr->name),
1063 "attr_x%02x", attr->entries[cnt].id);
1064
1065 sysfs_attr_init(&s_attr->dev_attr.attr);
1066 s_attr->dev_attr.attr.name = s_attr->name;
1067 s_attr->dev_attr.attr.mode = S_IRUGO;
1068 s_attr->dev_attr.show = mspro_block_attr_show(s_attr->id);
1069
1070 if (!s_attr->size)
1071 continue;
1072
1073 s_attr->data = kmalloc(s_attr->size, GFP_KERNEL);
1074 if (!s_attr->data) {
1075 rc = -ENOMEM;
1076 goto out_free_buffer;
1077 }
1078
1079 if (((addr / msb->page_size) == (attr_offset / msb->page_size))
1080 && (((addr + s_attr->size - 1) / msb->page_size)
1081 == (attr_offset / msb->page_size))) {
1082 memcpy(s_attr->data, buffer + addr % msb->page_size,
1083 s_attr->size);
1084 continue;
1085 }
1086
1087 attr_offset = (addr / msb->page_size) * msb->page_size;
1088
1089 if ((attr_offset + attr_len) < (addr + s_attr->size)) {
1090 kfree(buffer);
1091 attr_len = (((addr + s_attr->size) / msb->page_size)
1092 + 1 ) * msb->page_size - attr_offset;
1093 buffer = kmalloc(attr_len, GFP_KERNEL);
1094 if (!buffer) {
1095 rc = -ENOMEM;
1096 goto out_free_attr;
1097 }
1098 }
1099
1100 sg_init_one(&msb->req_sg[0], buffer, attr_len);
1101 msb->seg_count = 1;
1102 msb->current_seg = 0;
1103 msb->current_page = 0;
1104 msb->data_dir = READ;
1105 msb->transfer_cmd = MSPRO_CMD_READ_ATRB;
1106
1107 dev_dbg(&card->dev, "reading attribute range %x, %x\n",
1108 attr_offset, attr_len);
1109
1110 msb->setup_transfer(card, attr_offset, attr_len);
1111 memstick_new_req(card->host);
1112 wait_for_completion(&card->mrq_complete);
1113 if (card->current_mrq.error) {
1114 rc = card->current_mrq.error;
1115 goto out_free_buffer;
1116 }
1117
1118 memcpy(s_attr->data, buffer + addr % msb->page_size,
1119 s_attr->size);
1120 }
1121
1122 rc = 0;
1123 out_free_buffer:
1124 kfree(buffer);
1125 out_free_attr:
1126 kfree(attr);
1127 return rc;
1128 }
1129
1130 static int mspro_block_init_card(struct memstick_dev *card)
1131 {
1132 struct mspro_block_data *msb = memstick_get_drvdata(card);
1133 struct memstick_host *host = card->host;
1134 int rc = 0;
1135
1136 msb->system = MEMSTICK_SYS_SERIAL;
1137 msb->setup_transfer = h_mspro_block_setup_cmd;
1138
1139 card->reg_addr.r_offset = offsetof(struct mspro_register, status);
1140 card->reg_addr.r_length = sizeof(struct ms_status_register);
1141 card->reg_addr.w_offset = offsetof(struct mspro_register, param);
1142 card->reg_addr.w_length = sizeof(struct mspro_param_register);
1143
1144 if (memstick_set_rw_addr(card))
1145 return -EIO;
1146
1147 msb->caps = host->caps;
1148
1149 msleep(150);
1150 rc = mspro_block_wait_for_ced(card);
1151 if (rc)
1152 return rc;
1153
1154 rc = mspro_block_switch_interface(card);
1155 if (rc)
1156 return rc;
1157
1158 dev_dbg(&card->dev, "card activated\n");
1159 if (msb->system != MEMSTICK_SYS_SERIAL)
1160 msb->caps |= MEMSTICK_CAP_AUTO_GET_INT;
1161
1162 card->next_request = h_mspro_block_req_init;
1163 msb->mrq_handler = h_mspro_block_get_ro;
1164 memstick_init_req(&card->current_mrq, MS_TPC_READ_REG, NULL,
1165 sizeof(struct ms_status_register));
1166 memstick_new_req(card->host);
1167 wait_for_completion(&card->mrq_complete);
1168 if (card->current_mrq.error)
1169 return card->current_mrq.error;
1170
1171 dev_dbg(&card->dev, "card r/w status %d\n", msb->read_only ? 0 : 1);
1172
1173 msb->page_size = 512;
1174 rc = mspro_block_read_attributes(card);
1175 if (rc)
1176 return rc;
1177
1178 dev_dbg(&card->dev, "attributes loaded\n");
1179 return 0;
1180
1181 }
1182
1183 static int mspro_block_init_disk(struct memstick_dev *card)
1184 {
1185 struct mspro_block_data *msb = memstick_get_drvdata(card);
1186 struct memstick_host *host = card->host;
1187 struct mspro_devinfo *dev_info = NULL;
1188 struct mspro_sys_info *sys_info = NULL;
1189 struct mspro_sys_attr *s_attr = NULL;
1190 int rc, disk_id;
1191 u64 limit = BLK_BOUNCE_HIGH;
1192 unsigned long capacity;
1193
1194 if (host->dev.dma_mask && *(host->dev.dma_mask))
1195 limit = *(host->dev.dma_mask);
1196
1197 for (rc = 0; msb->attr_group.attrs[rc]; ++rc) {
1198 s_attr = mspro_from_sysfs_attr(msb->attr_group.attrs[rc]);
1199
1200 if (s_attr->id == MSPRO_BLOCK_ID_DEVINFO)
1201 dev_info = s_attr->data;
1202 else if (s_attr->id == MSPRO_BLOCK_ID_SYSINFO)
1203 sys_info = s_attr->data;
1204 }
1205
1206 if (!dev_info || !sys_info)
1207 return -ENODEV;
1208
1209 msb->cylinders = be16_to_cpu(dev_info->cylinders);
1210 msb->heads = be16_to_cpu(dev_info->heads);
1211 msb->sectors_per_track = be16_to_cpu(dev_info->sectors_per_track);
1212
1213 msb->page_size = be16_to_cpu(sys_info->unit_size);
1214
1215 mutex_lock(&mspro_block_disk_lock);
1216 if (!idr_pre_get(&mspro_block_disk_idr, GFP_KERNEL)) {
1217 mutex_unlock(&mspro_block_disk_lock);
1218 return -ENOMEM;
1219 }
1220
1221 rc = idr_get_new(&mspro_block_disk_idr, card, &disk_id);
1222 mutex_unlock(&mspro_block_disk_lock);
1223
1224 if (rc)
1225 return rc;
1226
1227 if ((disk_id << MSPRO_BLOCK_PART_SHIFT) > 255) {
1228 rc = -ENOSPC;
1229 goto out_release_id;
1230 }
1231
1232 msb->disk = alloc_disk(1 << MSPRO_BLOCK_PART_SHIFT);
1233 if (!msb->disk) {
1234 rc = -ENOMEM;
1235 goto out_release_id;
1236 }
1237
1238 msb->queue = blk_init_queue(mspro_block_submit_req, &msb->q_lock);
1239 if (!msb->queue) {
1240 rc = -ENOMEM;
1241 goto out_put_disk;
1242 }
1243
1244 msb->queue->queuedata = card;
1245 blk_queue_prep_rq(msb->queue, mspro_block_prepare_req);
1246
1247 blk_queue_bounce_limit(msb->queue, limit);
1248 blk_queue_max_hw_sectors(msb->queue, MSPRO_BLOCK_MAX_PAGES);
1249 blk_queue_max_segments(msb->queue, MSPRO_BLOCK_MAX_SEGS);
1250 blk_queue_max_segment_size(msb->queue,
1251 MSPRO_BLOCK_MAX_PAGES * msb->page_size);
1252
1253 msb->disk->major = major;
1254 msb->disk->first_minor = disk_id << MSPRO_BLOCK_PART_SHIFT;
1255 msb->disk->fops = &ms_block_bdops;
1256 msb->usage_count = 1;
1257 msb->disk->private_data = msb;
1258 msb->disk->queue = msb->queue;
1259 msb->disk->driverfs_dev = &card->dev;
1260
1261 sprintf(msb->disk->disk_name, "mspblk%d", disk_id);
1262
1263 blk_queue_logical_block_size(msb->queue, msb->page_size);
1264
1265 capacity = be16_to_cpu(sys_info->user_block_count);
1266 capacity *= be16_to_cpu(sys_info->block_size);
1267 capacity *= msb->page_size >> 9;
1268 set_capacity(msb->disk, capacity);
1269 dev_dbg(&card->dev, "capacity set %ld\n", capacity);
1270
1271 add_disk(msb->disk);
1272 msb->active = 1;
1273 return 0;
1274
1275 out_put_disk:
1276 put_disk(msb->disk);
1277 out_release_id:
1278 mutex_lock(&mspro_block_disk_lock);
1279 idr_remove(&mspro_block_disk_idr, disk_id);
1280 mutex_unlock(&mspro_block_disk_lock);
1281 return rc;
1282 }
1283
1284 static void mspro_block_data_clear(struct mspro_block_data *msb)
1285 {
1286 int cnt;
1287 struct mspro_sys_attr *s_attr;
1288
1289 if (msb->attr_group.attrs) {
1290 for (cnt = 0; msb->attr_group.attrs[cnt]; ++cnt) {
1291 s_attr = mspro_from_sysfs_attr(msb->attr_group
1292 .attrs[cnt]);
1293 kfree(s_attr->data);
1294 kfree(s_attr);
1295 }
1296 kfree(msb->attr_group.attrs);
1297 }
1298
1299 msb->card = NULL;
1300 }
1301
1302 static int mspro_block_check_card(struct memstick_dev *card)
1303 {
1304 struct mspro_block_data *msb = memstick_get_drvdata(card);
1305
1306 return (msb->active == 1);
1307 }
1308
1309 static int mspro_block_probe(struct memstick_dev *card)
1310 {
1311 struct mspro_block_data *msb;
1312 int rc = 0;
1313
1314 msb = kzalloc(sizeof(struct mspro_block_data), GFP_KERNEL);
1315 if (!msb)
1316 return -ENOMEM;
1317 memstick_set_drvdata(card, msb);
1318 msb->card = card;
1319 spin_lock_init(&msb->q_lock);
1320
1321 rc = mspro_block_init_card(card);
1322
1323 if (rc)
1324 goto out_free;
1325
1326 rc = sysfs_create_group(&card->dev.kobj, &msb->attr_group);
1327 if (rc)
1328 goto out_free;
1329
1330 rc = mspro_block_init_disk(card);
1331 if (!rc) {
1332 card->check = mspro_block_check_card;
1333 card->stop = mspro_block_stop;
1334 card->start = mspro_block_start;
1335 return 0;
1336 }
1337
1338 sysfs_remove_group(&card->dev.kobj, &msb->attr_group);
1339 out_free:
1340 memstick_set_drvdata(card, NULL);
1341 mspro_block_data_clear(msb);
1342 kfree(msb);
1343 return rc;
1344 }
1345
1346 static void mspro_block_remove(struct memstick_dev *card)
1347 {
1348 struct mspro_block_data *msb = memstick_get_drvdata(card);
1349 unsigned long flags;
1350
1351 spin_lock_irqsave(&msb->q_lock, flags);
1352 msb->eject = 1;
1353 blk_start_queue(msb->queue);
1354 spin_unlock_irqrestore(&msb->q_lock, flags);
1355
1356 del_gendisk(msb->disk);
1357 dev_dbg(&card->dev, "mspro block remove\n");
1358
1359 blk_cleanup_queue(msb->queue);
1360 msb->queue = NULL;
1361
1362 sysfs_remove_group(&card->dev.kobj, &msb->attr_group);
1363
1364 mutex_lock(&mspro_block_disk_lock);
1365 mspro_block_data_clear(msb);
1366 mutex_unlock(&mspro_block_disk_lock);
1367
1368 mspro_block_disk_release(msb->disk);
1369 memstick_set_drvdata(card, NULL);
1370 }
1371
1372 #ifdef CONFIG_PM
1373
1374 static int mspro_block_suspend(struct memstick_dev *card, pm_message_t state)
1375 {
1376 struct mspro_block_data *msb = memstick_get_drvdata(card);
1377 unsigned long flags;
1378
1379 spin_lock_irqsave(&msb->q_lock, flags);
1380 blk_stop_queue(msb->queue);
1381 msb->active = 0;
1382 spin_unlock_irqrestore(&msb->q_lock, flags);
1383
1384 return 0;
1385 }
1386
1387 static int mspro_block_resume(struct memstick_dev *card)
1388 {
1389 struct mspro_block_data *msb = memstick_get_drvdata(card);
1390 unsigned long flags;
1391 int rc = 0;
1392
1393 #ifdef CONFIG_MEMSTICK_UNSAFE_RESUME
1394
1395 struct mspro_block_data *new_msb;
1396 struct memstick_host *host = card->host;
1397 struct mspro_sys_attr *s_attr, *r_attr;
1398 unsigned char cnt;
1399
1400 mutex_lock(&host->lock);
1401 new_msb = kzalloc(sizeof(struct mspro_block_data), GFP_KERNEL);
1402 if (!new_msb) {
1403 rc = -ENOMEM;
1404 goto out_unlock;
1405 }
1406
1407 new_msb->card = card;
1408 memstick_set_drvdata(card, new_msb);
1409 if (mspro_block_init_card(card))
1410 goto out_free;
1411
1412 for (cnt = 0; new_msb->attr_group.attrs[cnt]
1413 && msb->attr_group.attrs[cnt]; ++cnt) {
1414 s_attr = mspro_from_sysfs_attr(new_msb->attr_group.attrs[cnt]);
1415 r_attr = mspro_from_sysfs_attr(msb->attr_group.attrs[cnt]);
1416
1417 if (s_attr->id == MSPRO_BLOCK_ID_SYSINFO
1418 && r_attr->id == s_attr->id) {
1419 if (memcmp(s_attr->data, r_attr->data, s_attr->size))
1420 break;
1421
1422 msb->active = 1;
1423 break;
1424 }
1425 }
1426
1427 out_free:
1428 memstick_set_drvdata(card, msb);
1429 mspro_block_data_clear(new_msb);
1430 kfree(new_msb);
1431 out_unlock:
1432 mutex_unlock(&host->lock);
1433
1434 #endif /* CONFIG_MEMSTICK_UNSAFE_RESUME */
1435
1436 spin_lock_irqsave(&msb->q_lock, flags);
1437 blk_start_queue(msb->queue);
1438 spin_unlock_irqrestore(&msb->q_lock, flags);
1439 return rc;
1440 }
1441
1442 #else
1443
1444 #define mspro_block_suspend NULL
1445 #define mspro_block_resume NULL
1446
1447 #endif /* CONFIG_PM */
1448
1449 static struct memstick_device_id mspro_block_id_tbl[] = {
1450 {MEMSTICK_MATCH_ALL, MEMSTICK_TYPE_PRO, MEMSTICK_CATEGORY_STORAGE_DUO,
1451 MEMSTICK_CLASS_DUO},
1452 {}
1453 };
1454
1455
1456 static struct memstick_driver mspro_block_driver = {
1457 .driver = {
1458 .name = DRIVER_NAME,
1459 .owner = THIS_MODULE
1460 },
1461 .id_table = mspro_block_id_tbl,
1462 .probe = mspro_block_probe,
1463 .remove = mspro_block_remove,
1464 .suspend = mspro_block_suspend,
1465 .resume = mspro_block_resume
1466 };
1467
1468 static int __init mspro_block_init(void)
1469 {
1470 int rc = -ENOMEM;
1471
1472 rc = register_blkdev(major, DRIVER_NAME);
1473 if (rc < 0) {
1474 printk(KERN_ERR DRIVER_NAME ": failed to register "
1475 "major %d, error %d\n", major, rc);
1476 return rc;
1477 }
1478 if (!major)
1479 major = rc;
1480
1481 rc = memstick_register_driver(&mspro_block_driver);
1482 if (rc)
1483 unregister_blkdev(major, DRIVER_NAME);
1484 return rc;
1485 }
1486
1487 static void __exit mspro_block_exit(void)
1488 {
1489 memstick_unregister_driver(&mspro_block_driver);
1490 unregister_blkdev(major, DRIVER_NAME);
1491 idr_destroy(&mspro_block_disk_idr);
1492 }
1493
1494 module_init(mspro_block_init);
1495 module_exit(mspro_block_exit);
1496
1497 MODULE_LICENSE("GPL");
1498 MODULE_AUTHOR("Alex Dubov");
1499 MODULE_DESCRIPTION("Sony MemoryStickPro block device driver");
1500 MODULE_DEVICE_TABLE(memstick, mspro_block_id_tbl);
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree