1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Sony MemoryStick Pro storage support
4 *
5 * Copyright (C) 2007 Alex Dubov <oakad@yahoo.com>
6 *
7 * Special thanks to Carlos Corbacho for providing various MemoryStick cards
8 * that made this driver possible.
9 */
10
11 #include <linux/blk-mq.h>
12 #include <linux/idr.h>
13 #include <linux/hdreg.h>
14 #include <linux/kthread.h>
15 #include <linux/delay.h>
16 #include <linux/slab.h>
17 #include <linux/mutex.h>
18 #include <linux/memstick.h>
19 #include <linux/module.h>
20
21 #define DRIVER_NAME "mspro_block"
22
23 static int major;
24 module_param(major, int, 0644);
25
26 #define MSPRO_BLOCK_MAX_SEGS 32
27 #define MSPRO_BLOCK_MAX_PAGES ((2 << 16) - 1)
28
29 #define MSPRO_BLOCK_SIGNATURE 0xa5c3
30 #define MSPRO_BLOCK_MAX_ATTRIBUTES 41
31
32 #define MSPRO_BLOCK_PART_SHIFT 3
33
34 enum {
35 MSPRO_BLOCK_ID_SYSINFO = 0x10,
36 MSPRO_BLOCK_ID_MODELNAME = 0x15,
37 MSPRO_BLOCK_ID_MBR = 0x20,
38 MSPRO_BLOCK_ID_PBR16 = 0x21,
39 MSPRO_BLOCK_ID_PBR32 = 0x22,
40 MSPRO_BLOCK_ID_SPECFILEVALUES1 = 0x25,
41 MSPRO_BLOCK_ID_SPECFILEVALUES2 = 0x26,
42 MSPRO_BLOCK_ID_DEVINFO = 0x30
43 };
44
45 struct mspro_sys_attr {
46 size_t size;
47 void *data;
48 unsigned char id;
49 char name[32];
50 struct device_attribute dev_attr;
51 };
52
53 struct mspro_attr_entry {
54 __be32 address;
55 __be32 size;
56 unsigned char id;
57 unsigned char reserved[3];
58 } __attribute__((packed));
59
60 struct mspro_attribute {
61 __be16 signature;
62 unsigned short version;
63 unsigned char count;
64 unsigned char reserved[11];
65 struct mspro_attr_entry entries[];
66 } __attribute__((packed));
67
68 struct mspro_sys_info {
69 unsigned char class;
70 unsigned char reserved0;
71 __be16 block_size;
72 __be16 block_count;
73 __be16 user_block_count;
74 __be16 page_size;
75 unsigned char reserved1[2];
76 unsigned char assembly_date[8];
77 __be32 serial_number;
78 unsigned char assembly_maker_code;
79 unsigned char assembly_model_code[3];
80 __be16 memory_maker_code;
81 __be16 memory_model_code;
82 unsigned char reserved2[4];
83 unsigned char vcc;
84 unsigned char vpp;
85 __be16 controller_number;
86 __be16 controller_function;
87 __be16 start_sector;
88 __be16 unit_size;
89 unsigned char ms_sub_class;
90 unsigned char reserved3[4];
91 unsigned char interface_type;
92 __be16 controller_code;
93 unsigned char format_type;
94 unsigned char reserved4;
95 unsigned char device_type;
96 unsigned char reserved5[7];
97 unsigned char mspro_id[16];
98 unsigned char reserved6[16];
99 } __attribute__((packed));
100
101 struct mspro_mbr {
102 unsigned char boot_partition;
103 unsigned char start_head;
104 unsigned char start_sector;
105 unsigned char start_cylinder;
106 unsigned char partition_type;
107 unsigned char end_head;
108 unsigned char end_sector;
109 unsigned char end_cylinder;
110 unsigned int start_sectors;
111 unsigned int sectors_per_partition;
112 } __attribute__((packed));
113
114 struct mspro_specfile {
115 char name[8];
116 char ext[3];
117 unsigned char attr;
118 unsigned char reserved[10];
119 unsigned short time;
120 unsigned short date;
121 unsigned short cluster;
122 unsigned int size;
123 } __attribute__((packed));
124
125 struct mspro_devinfo {
126 __be16 cylinders;
127 __be16 heads;
128 __be16 bytes_per_track;
129 __be16 bytes_per_sector;
130 __be16 sectors_per_track;
131 unsigned char reserved[6];
132 } __attribute__((packed));
133
134 struct mspro_block_data {
135 struct memstick_dev *card;
136 unsigned int caps;
137 struct gendisk *disk;
138 struct request_queue *queue;
139 struct request *block_req;
140 struct blk_mq_tag_set tag_set;
141 spinlock_t q_lock;
142
143 unsigned short page_size;
144 unsigned short cylinders;
145 unsigned short heads;
146 unsigned short sectors_per_track;
147
148 unsigned char system;
149 unsigned char read_only:1,
150 eject:1,
151 data_dir:1,
152 active:1;
153 unsigned char transfer_cmd;
154
155 int (*mrq_handler)(struct memstick_dev *card,
156 struct memstick_request **mrq);
157
158
159 /* Default request setup function for data access method preferred by
160 * this host instance.
161 */
162 void (*setup_transfer)(struct memstick_dev *card,
163 u64 offset, size_t length);
164
165 struct attribute_group attr_group;
166
167 struct scatterlist req_sg[MSPRO_BLOCK_MAX_SEGS];
168 unsigned int seg_count;
169 unsigned int current_seg;
170 unsigned int current_page;
171 };
172
173 static DEFINE_IDR(mspro_block_disk_idr);
174 static DEFINE_MUTEX(mspro_block_disk_lock);
175
176 static int mspro_block_complete_req(struct memstick_dev *card, int error);
177
178 /*** Block device ***/
179
mspro_block_bd_free_disk(struct gendisk * disk)180 static void mspro_block_bd_free_disk(struct gendisk *disk)
181 {
182 struct mspro_block_data *msb = disk->private_data;
183 int disk_id = MINOR(disk_devt(disk)) >> MSPRO_BLOCK_PART_SHIFT;
184
185 mutex_lock(&mspro_block_disk_lock);
186 idr_remove(&mspro_block_disk_idr, disk_id);
187 mutex_unlock(&mspro_block_disk_lock);
188
189 kfree(msb);
190 }
191
mspro_block_bd_getgeo(struct gendisk * disk,struct hd_geometry * geo)192 static int mspro_block_bd_getgeo(struct gendisk *disk,
193 struct hd_geometry *geo)
194 {
195 struct mspro_block_data *msb = disk->private_data;
196
197 geo->heads = msb->heads;
198 geo->sectors = msb->sectors_per_track;
199 geo->cylinders = msb->cylinders;
200
201 return 0;
202 }
203
204 static const struct block_device_operations ms_block_bdops = {
205 .owner = THIS_MODULE,
206 .getgeo = mspro_block_bd_getgeo,
207 .free_disk = mspro_block_bd_free_disk,
208 };
209
210 /*** Information ***/
211
mspro_from_sysfs_attr(struct attribute * attr)212 static struct mspro_sys_attr *mspro_from_sysfs_attr(struct attribute *attr)
213 {
214 struct device_attribute *dev_attr
215 = container_of(attr, struct device_attribute, attr);
216 return container_of(dev_attr, struct mspro_sys_attr, dev_attr);
217 }
218
mspro_block_attr_name(unsigned char tag)219 static const char *mspro_block_attr_name(unsigned char tag)
220 {
221 switch (tag) {
222 case MSPRO_BLOCK_ID_SYSINFO:
223 return "attr_sysinfo";
224 case MSPRO_BLOCK_ID_MODELNAME:
225 return "attr_modelname";
226 case MSPRO_BLOCK_ID_MBR:
227 return "attr_mbr";
228 case MSPRO_BLOCK_ID_PBR16:
229 return "attr_pbr16";
230 case MSPRO_BLOCK_ID_PBR32:
231 return "attr_pbr32";
232 case MSPRO_BLOCK_ID_SPECFILEVALUES1:
233 return "attr_specfilevalues1";
234 case MSPRO_BLOCK_ID_SPECFILEVALUES2:
235 return "attr_specfilevalues2";
236 case MSPRO_BLOCK_ID_DEVINFO:
237 return "attr_devinfo";
238 default:
239 return NULL;
240 }
241 }
242
243 typedef ssize_t (*sysfs_show_t)(struct device *dev,
244 struct device_attribute *attr,
245 char *buffer);
246
mspro_block_attr_show_default(struct device * dev,struct device_attribute * attr,char * buffer)247 static ssize_t mspro_block_attr_show_default(struct device *dev,
248 struct device_attribute *attr,
249 char *buffer)
250 {
251 struct mspro_sys_attr *s_attr = container_of(attr,
252 struct mspro_sys_attr,
253 dev_attr);
254
255 ssize_t cnt, rc = 0;
256
257 for (cnt = 0; cnt < s_attr->size; cnt++) {
258 if (cnt && !(cnt % 16)) {
259 if (PAGE_SIZE - rc)
260 buffer[rc++] = '\n';
261 }
262
263 rc += sysfs_emit_at(buffer, rc, "%02x ",
264 ((unsigned char *)s_attr->data)[cnt]);
265 }
266 return rc;
267 }
268
mspro_block_attr_show_sysinfo(struct device * dev,struct device_attribute * attr,char * buffer)269 static ssize_t mspro_block_attr_show_sysinfo(struct device *dev,
270 struct device_attribute *attr,
271 char *buffer)
272 {
273 struct mspro_sys_attr *x_attr = container_of(attr,
274 struct mspro_sys_attr,
275 dev_attr);
276 struct mspro_sys_info *x_sys = x_attr->data;
277 ssize_t rc = 0;
278 int date_tz = 0, date_tz_f = 0;
279
280 if (x_sys->assembly_date[0] > 0x80U) {
281 date_tz = (~x_sys->assembly_date[0]) + 1;
282 date_tz_f = date_tz & 3;
283 date_tz >>= 2;
284 date_tz = -date_tz;
285 date_tz_f *= 15;
286 } else if (x_sys->assembly_date[0] < 0x80U) {
287 date_tz = x_sys->assembly_date[0];
288 date_tz_f = date_tz & 3;
289 date_tz >>= 2;
290 date_tz_f *= 15;
291 }
292
293 rc += sysfs_emit_at(buffer, rc, "class: %x\n", x_sys->class);
294 rc += sysfs_emit_at(buffer, rc, "block size: %x\n", be16_to_cpu(x_sys->block_size));
295 rc += sysfs_emit_at(buffer, rc, "block count: %x\n", be16_to_cpu(x_sys->block_count));
296 rc += sysfs_emit_at(buffer, rc, "user block count: %x\n",
297 be16_to_cpu(x_sys->user_block_count));
298 rc += sysfs_emit_at(buffer, rc, "page size: %x\n", be16_to_cpu(x_sys->page_size));
299 rc += sysfs_emit_at(buffer, rc, "assembly date: GMT%+d:%d %04u-%02u-%02u %02u:%02u:%02u\n",
300 date_tz, date_tz_f,
301 be16_to_cpup((__be16 *)&x_sys->assembly_date[1]),
302 x_sys->assembly_date[3], x_sys->assembly_date[4],
303 x_sys->assembly_date[5], x_sys->assembly_date[6],
304 x_sys->assembly_date[7]);
305 rc += sysfs_emit_at(buffer, rc, "serial number: %x\n", be32_to_cpu(x_sys->serial_number));
306 rc += sysfs_emit_at(buffer, rc, "assembly maker code: %x\n", x_sys->assembly_maker_code);
307 rc += sysfs_emit_at(buffer, rc, "assembly model code: %02x%02x%02x\n",
308 x_sys->assembly_model_code[0],
309 x_sys->assembly_model_code[1],
310 x_sys->assembly_model_code[2]);
311 rc += sysfs_emit_at(buffer, rc, "memory maker code: %x\n",
312 be16_to_cpu(x_sys->memory_maker_code));
313 rc += sysfs_emit_at(buffer, rc, "memory model code: %x\n",
314 be16_to_cpu(x_sys->memory_model_code));
315 rc += sysfs_emit_at(buffer, rc, "vcc: %x\n", x_sys->vcc);
316 rc += sysfs_emit_at(buffer, rc, "vpp: %x\n", x_sys->vpp);
317 rc += sysfs_emit_at(buffer, rc, "controller number: %x\n",
318 be16_to_cpu(x_sys->controller_number));
319 rc += sysfs_emit_at(buffer, rc, "controller function: %x\n",
320 be16_to_cpu(x_sys->controller_function));
321 rc += sysfs_emit_at(buffer, rc, "start sector: %x\n", be16_to_cpu(x_sys->start_sector));
322 rc += sysfs_emit_at(buffer, rc, "unit size: %x\n", be16_to_cpu(x_sys->unit_size));
323 rc += sysfs_emit_at(buffer, rc, "sub class: %x\n", x_sys->ms_sub_class);
324 rc += sysfs_emit_at(buffer, rc, "interface type: %x\n", x_sys->interface_type);
325 rc += sysfs_emit_at(buffer, rc, "controller code: %x\n",
326 be16_to_cpu(x_sys->controller_code));
327 rc += sysfs_emit_at(buffer, rc, "format type: %x\n", x_sys->format_type);
328 rc += sysfs_emit_at(buffer, rc, "device type: %x\n", x_sys->device_type);
329 rc += sysfs_emit_at(buffer, rc, "mspro id: %s\n", x_sys->mspro_id);
330 return rc;
331 }
332
mspro_block_attr_show_modelname(struct device * dev,struct device_attribute * attr,char * buffer)333 static ssize_t mspro_block_attr_show_modelname(struct device *dev,
334 struct device_attribute *attr,
335 char *buffer)
336 {
337 struct mspro_sys_attr *s_attr = container_of(attr,
338 struct mspro_sys_attr,
339 dev_attr);
340
341 return sysfs_emit(buffer, "%s", (char *)s_attr->data);
342 }
343
mspro_block_attr_show_mbr(struct device * dev,struct device_attribute * attr,char * buffer)344 static ssize_t mspro_block_attr_show_mbr(struct device *dev,
345 struct device_attribute *attr,
346 char *buffer)
347 {
348 struct mspro_sys_attr *x_attr = container_of(attr,
349 struct mspro_sys_attr,
350 dev_attr);
351 struct mspro_mbr *x_mbr = x_attr->data;
352 ssize_t rc = 0;
353
354 rc += sysfs_emit_at(buffer, rc, "boot partition: %x\n", x_mbr->boot_partition);
355 rc += sysfs_emit_at(buffer, rc, "start head: %x\n", x_mbr->start_head);
356 rc += sysfs_emit_at(buffer, rc, "start sector: %x\n", x_mbr->start_sector);
357 rc += sysfs_emit_at(buffer, rc, "start cylinder: %x\n", x_mbr->start_cylinder);
358 rc += sysfs_emit_at(buffer, rc, "partition type: %x\n", x_mbr->partition_type);
359 rc += sysfs_emit_at(buffer, rc, "end head: %x\n", x_mbr->end_head);
360 rc += sysfs_emit_at(buffer, rc, "end sector: %x\n", x_mbr->end_sector);
361 rc += sysfs_emit_at(buffer, rc, "end cylinder: %x\n", x_mbr->end_cylinder);
362 rc += sysfs_emit_at(buffer, rc, "start sectors: %x\n", x_mbr->start_sectors);
363 rc += sysfs_emit_at(buffer, rc, "sectors per partition: %x\n",
364 x_mbr->sectors_per_partition);
365 return rc;
366 }
367
mspro_block_attr_show_specfile(struct device * dev,struct device_attribute * attr,char * buffer)368 static ssize_t mspro_block_attr_show_specfile(struct device *dev,
369 struct device_attribute *attr,
370 char *buffer)
371 {
372 struct mspro_sys_attr *x_attr = container_of(attr,
373 struct mspro_sys_attr,
374 dev_attr);
375 struct mspro_specfile *x_spfile = x_attr->data;
376 char name[9], ext[4];
377 ssize_t rc = 0;
378
379 memcpy(name, x_spfile->name, 8);
380 name[8] = 0;
381 memcpy(ext, x_spfile->ext, 3);
382 ext[3] = 0;
383
384 rc += sysfs_emit_at(buffer, rc, "name: %s\n", name);
385 rc += sysfs_emit_at(buffer, rc, "ext: %s\n", ext);
386 rc += sysfs_emit_at(buffer, rc, "attribute: %x\n", x_spfile->attr);
387 rc += sysfs_emit_at(buffer, rc, "time: %d:%d:%d\n",
388 x_spfile->time >> 11,
389 (x_spfile->time >> 5) & 0x3f,
390 (x_spfile->time & 0x1f) * 2);
391 rc += sysfs_emit_at(buffer, rc, "date: %d-%d-%d\n",
392 (x_spfile->date >> 9) + 1980,
393 (x_spfile->date >> 5) & 0xf,
394 x_spfile->date & 0x1f);
395 rc += sysfs_emit_at(buffer, rc, "start cluster: %x\n", x_spfile->cluster);
396 rc += sysfs_emit_at(buffer, rc, "size: %x\n", x_spfile->size);
397 return rc;
398 }
399
mspro_block_attr_show_devinfo(struct device * dev,struct device_attribute * attr,char * buffer)400 static ssize_t mspro_block_attr_show_devinfo(struct device *dev,
401 struct device_attribute *attr,
402 char *buffer)
403 {
404 struct mspro_sys_attr *x_attr = container_of(attr,
405 struct mspro_sys_attr,
406 dev_attr);
407 struct mspro_devinfo *x_devinfo = x_attr->data;
408 ssize_t rc = 0;
409
410 rc += sysfs_emit_at(buffer, rc, "cylinders: %x\n", be16_to_cpu(x_devinfo->cylinders));
411 rc += sysfs_emit_at(buffer, rc, "heads: %x\n", be16_to_cpu(x_devinfo->heads));
412 rc += sysfs_emit_at(buffer, rc, "bytes per track: %x\n",
413 be16_to_cpu(x_devinfo->bytes_per_track));
414 rc += sysfs_emit_at(buffer, rc, "bytes per sector: %x\n",
415 be16_to_cpu(x_devinfo->bytes_per_sector));
416 rc += sysfs_emit_at(buffer, rc, "sectors per track: %x\n",
417 be16_to_cpu(x_devinfo->sectors_per_track));
418 return rc;
419 }
420
mspro_block_attr_show(unsigned char tag)421 static sysfs_show_t mspro_block_attr_show(unsigned char tag)
422 {
423 switch (tag) {
424 case MSPRO_BLOCK_ID_SYSINFO:
425 return mspro_block_attr_show_sysinfo;
426 case MSPRO_BLOCK_ID_MODELNAME:
427 return mspro_block_attr_show_modelname;
428 case MSPRO_BLOCK_ID_MBR:
429 return mspro_block_attr_show_mbr;
430 case MSPRO_BLOCK_ID_SPECFILEVALUES1:
431 case MSPRO_BLOCK_ID_SPECFILEVALUES2:
432 return mspro_block_attr_show_specfile;
433 case MSPRO_BLOCK_ID_DEVINFO:
434 return mspro_block_attr_show_devinfo;
435 default:
436 return mspro_block_attr_show_default;
437 }
438 }
439
440 /*** Protocol handlers ***/
441
442 /*
443 * Functions prefixed with "h_" are protocol callbacks. They can be called from
444 * interrupt context. Return value of 0 means that request processing is still
445 * ongoing, while special error value of -EAGAIN means that current request is
446 * finished (and request processor should come back some time later).
447 */
448
h_mspro_block_req_init(struct memstick_dev * card,struct memstick_request ** mrq)449 static int h_mspro_block_req_init(struct memstick_dev *card,
450 struct memstick_request **mrq)
451 {
452 struct mspro_block_data *msb = memstick_get_drvdata(card);
453
454 *mrq = &card->current_mrq;
455 card->next_request = msb->mrq_handler;
456 return 0;
457 }
458
h_mspro_block_default(struct memstick_dev * card,struct memstick_request ** mrq)459 static int h_mspro_block_default(struct memstick_dev *card,
460 struct memstick_request **mrq)
461 {
462 return mspro_block_complete_req(card, (*mrq)->error);
463 }
464
h_mspro_block_default_bad(struct memstick_dev * card,struct memstick_request ** mrq)465 static int h_mspro_block_default_bad(struct memstick_dev *card,
466 struct memstick_request **mrq)
467 {
468 return -ENXIO;
469 }
470
h_mspro_block_get_ro(struct memstick_dev * card,struct memstick_request ** mrq)471 static int h_mspro_block_get_ro(struct memstick_dev *card,
472 struct memstick_request **mrq)
473 {
474 struct mspro_block_data *msb = memstick_get_drvdata(card);
475
476 if (!(*mrq)->error) {
477 if ((*mrq)->data[offsetof(struct ms_status_register, status0)]
478 & MEMSTICK_STATUS0_WP)
479 msb->read_only = 1;
480 else
481 msb->read_only = 0;
482 }
483
484 return mspro_block_complete_req(card, (*mrq)->error);
485 }
486
h_mspro_block_wait_for_ced(struct memstick_dev * card,struct memstick_request ** mrq)487 static int h_mspro_block_wait_for_ced(struct memstick_dev *card,
488 struct memstick_request **mrq)
489 {
490 dev_dbg(&card->dev, "wait for ced: value %x\n", (*mrq)->data[0]);
491
492 if (!(*mrq)->error) {
493 if ((*mrq)->data[0] & (MEMSTICK_INT_CMDNAK | MEMSTICK_INT_ERR))
494 (*mrq)->error = -EFAULT;
495 else if (!((*mrq)->data[0] & MEMSTICK_INT_CED))
496 return 0;
497 }
498
499 return mspro_block_complete_req(card, (*mrq)->error);
500 }
501
h_mspro_block_transfer_data(struct memstick_dev * card,struct memstick_request ** mrq)502 static int h_mspro_block_transfer_data(struct memstick_dev *card,
503 struct memstick_request **mrq)
504 {
505 struct mspro_block_data *msb = memstick_get_drvdata(card);
506 unsigned char t_val = 0;
507 struct scatterlist t_sg = { 0 };
508 size_t t_offset;
509
510 if ((*mrq)->error)
511 return mspro_block_complete_req(card, (*mrq)->error);
512
513 switch ((*mrq)->tpc) {
514 case MS_TPC_WRITE_REG:
515 memstick_init_req(*mrq, MS_TPC_SET_CMD, &msb->transfer_cmd, 1);
516 (*mrq)->need_card_int = 1;
517 return 0;
518 case MS_TPC_SET_CMD:
519 t_val = (*mrq)->int_reg;
520 memstick_init_req(*mrq, MS_TPC_GET_INT, NULL, 1);
521 if (msb->caps & MEMSTICK_CAP_AUTO_GET_INT)
522 goto has_int_reg;
523 return 0;
524 case MS_TPC_GET_INT:
525 t_val = (*mrq)->data[0];
526 has_int_reg:
527 if (t_val & (MEMSTICK_INT_CMDNAK | MEMSTICK_INT_ERR)) {
528 t_val = MSPRO_CMD_STOP;
529 memstick_init_req(*mrq, MS_TPC_SET_CMD, &t_val, 1);
530 card->next_request = h_mspro_block_default;
531 return 0;
532 }
533
534 if (msb->current_page
535 == (msb->req_sg[msb->current_seg].length
536 / msb->page_size)) {
537 msb->current_page = 0;
538 msb->current_seg++;
539
540 if (msb->current_seg == msb->seg_count) {
541 if (t_val & MEMSTICK_INT_CED) {
542 return mspro_block_complete_req(card,
543 0);
544 } else {
545 card->next_request
546 = h_mspro_block_wait_for_ced;
547 memstick_init_req(*mrq, MS_TPC_GET_INT,
548 NULL, 1);
549 return 0;
550 }
551 }
552 }
553
554 if (!(t_val & MEMSTICK_INT_BREQ)) {
555 memstick_init_req(*mrq, MS_TPC_GET_INT, NULL, 1);
556 return 0;
557 }
558
559 t_offset = msb->req_sg[msb->current_seg].offset;
560 t_offset += msb->current_page * msb->page_size;
561
562 sg_set_page(&t_sg,
563 sg_page(&(msb->req_sg[msb->current_seg])) + (t_offset >> PAGE_SHIFT),
564 msb->page_size, offset_in_page(t_offset));
565
566 memstick_init_req_sg(*mrq, msb->data_dir == READ
567 ? MS_TPC_READ_LONG_DATA
568 : MS_TPC_WRITE_LONG_DATA,
569 &t_sg);
570 (*mrq)->need_card_int = 1;
571 return 0;
572 case MS_TPC_READ_LONG_DATA:
573 case MS_TPC_WRITE_LONG_DATA:
574 msb->current_page++;
575 if (msb->caps & MEMSTICK_CAP_AUTO_GET_INT) {
576 t_val = (*mrq)->int_reg;
577 goto has_int_reg;
578 } else {
579 memstick_init_req(*mrq, MS_TPC_GET_INT, NULL, 1);
580 return 0;
581 }
582
583 default:
584 BUG();
585 }
586 }
587
588 /*** Transfer setup functions for different access methods. ***/
589
590 /** Setup data transfer request for SET_CMD TPC with arguments in card
591 * registers.
592 *
593 * @card Current media instance
594 * @offset Target data offset in bytes
595 * @length Required transfer length in bytes.
596 */
h_mspro_block_setup_cmd(struct memstick_dev * card,u64 offset,size_t length)597 static void h_mspro_block_setup_cmd(struct memstick_dev *card, u64 offset,
598 size_t length)
599 {
600 struct mspro_block_data *msb = memstick_get_drvdata(card);
601 struct mspro_param_register param = {
602 .system = msb->system,
603 .data_count = cpu_to_be16((uint16_t)(length / msb->page_size)),
604 /* ISO C90 warning precludes direct initialization for now. */
605 .data_address = 0,
606 .tpc_param = 0
607 };
608
609 do_div(offset, msb->page_size);
610 param.data_address = cpu_to_be32((uint32_t)offset);
611
612 card->next_request = h_mspro_block_req_init;
613 msb->mrq_handler = h_mspro_block_transfer_data;
614 memstick_init_req(&card->current_mrq, MS_TPC_WRITE_REG,
615 ¶m, sizeof(param));
616 }
617
618 /*** Data transfer ***/
619
mspro_block_issue_req(struct memstick_dev * card)620 static int mspro_block_issue_req(struct memstick_dev *card)
621 {
622 struct mspro_block_data *msb = memstick_get_drvdata(card);
623 u64 t_off;
624 unsigned int count;
625
626 while (true) {
627 msb->current_page = 0;
628 msb->current_seg = 0;
629 msb->seg_count = blk_rq_map_sg(msb->block_req, msb->req_sg);
630
631 if (!msb->seg_count) {
632 unsigned int bytes = blk_rq_cur_bytes(msb->block_req);
633 bool chunk;
634
635 chunk = blk_update_request(msb->block_req,
636 BLK_STS_RESOURCE,
637 bytes);
638 if (chunk)
639 continue;
640 __blk_mq_end_request(msb->block_req,
641 BLK_STS_RESOURCE);
642 msb->block_req = NULL;
643 return -EAGAIN;
644 }
645
646 t_off = blk_rq_pos(msb->block_req);
647 t_off <<= 9;
648 count = blk_rq_bytes(msb->block_req);
649
650 msb->setup_transfer(card, t_off, count);
651
652 msb->data_dir = rq_data_dir(msb->block_req);
653 msb->transfer_cmd = msb->data_dir == READ
654 ? MSPRO_CMD_READ_DATA
655 : MSPRO_CMD_WRITE_DATA;
656
657 memstick_new_req(card->host);
658 return 0;
659 }
660 }
661
mspro_block_complete_req(struct memstick_dev * card,int error)662 static int mspro_block_complete_req(struct memstick_dev *card, int error)
663 {
664 struct mspro_block_data *msb = memstick_get_drvdata(card);
665 int cnt;
666 bool chunk;
667 unsigned int t_len = 0;
668 unsigned long flags;
669
670 spin_lock_irqsave(&msb->q_lock, flags);
671 dev_dbg(&card->dev, "complete %d, %d\n", msb->block_req ? 1 : 0,
672 error);
673
674 if (msb->block_req) {
675 /* Nothing to do - not really an error */
676 if (error == -EAGAIN)
677 error = 0;
678
679 if (error || (card->current_mrq.tpc == MSPRO_CMD_STOP)) {
680 if (msb->data_dir == READ) {
681 for (cnt = 0; cnt < msb->current_seg; cnt++) {
682 t_len += msb->req_sg[cnt].length
683 / msb->page_size;
684
685 if (msb->current_page)
686 t_len += msb->current_page - 1;
687
688 t_len *= msb->page_size;
689 }
690 }
691 } else
692 t_len = blk_rq_bytes(msb->block_req);
693
694 dev_dbg(&card->dev, "transferred %x (%d)\n", t_len, error);
695
696 if (error && !t_len)
697 t_len = blk_rq_cur_bytes(msb->block_req);
698
699 chunk = blk_update_request(msb->block_req,
700 errno_to_blk_status(error), t_len);
701 if (chunk) {
702 error = mspro_block_issue_req(card);
703 if (!error)
704 goto out;
705 } else {
706 __blk_mq_end_request(msb->block_req,
707 errno_to_blk_status(error));
708 msb->block_req = NULL;
709 }
710 } else {
711 if (!error)
712 error = -EAGAIN;
713 }
714
715 card->next_request = h_mspro_block_default_bad;
716 complete_all(&card->mrq_complete);
717 out:
718 spin_unlock_irqrestore(&msb->q_lock, flags);
719 return error;
720 }
721
mspro_block_stop(struct memstick_dev * card)722 static void mspro_block_stop(struct memstick_dev *card)
723 {
724 struct mspro_block_data *msb = memstick_get_drvdata(card);
725 int rc = 0;
726 unsigned long flags;
727
728 while (1) {
729 spin_lock_irqsave(&msb->q_lock, flags);
730 if (!msb->block_req) {
731 blk_mq_stop_hw_queues(msb->queue);
732 rc = 1;
733 }
734 spin_unlock_irqrestore(&msb->q_lock, flags);
735
736 if (rc)
737 break;
738
739 wait_for_completion(&card->mrq_complete);
740 }
741 }
742
mspro_block_start(struct memstick_dev * card)743 static void mspro_block_start(struct memstick_dev *card)
744 {
745 struct mspro_block_data *msb = memstick_get_drvdata(card);
746
747 blk_mq_start_hw_queues(msb->queue);
748 }
749
mspro_queue_rq(struct blk_mq_hw_ctx * hctx,const struct blk_mq_queue_data * bd)750 static blk_status_t mspro_queue_rq(struct blk_mq_hw_ctx *hctx,
751 const struct blk_mq_queue_data *bd)
752 {
753 struct memstick_dev *card = hctx->queue->queuedata;
754 struct mspro_block_data *msb = memstick_get_drvdata(card);
755
756 spin_lock_irq(&msb->q_lock);
757
758 if (msb->block_req) {
759 spin_unlock_irq(&msb->q_lock);
760 return BLK_STS_DEV_RESOURCE;
761 }
762
763 if (msb->eject) {
764 spin_unlock_irq(&msb->q_lock);
765 blk_mq_start_request(bd->rq);
766 return BLK_STS_IOERR;
767 }
768
769 msb->block_req = bd->rq;
770 blk_mq_start_request(bd->rq);
771
772 if (mspro_block_issue_req(card))
773 msb->block_req = NULL;
774
775 spin_unlock_irq(&msb->q_lock);
776 return BLK_STS_OK;
777 }
778
779 /*** Initialization ***/
780
mspro_block_wait_for_ced(struct memstick_dev * card)781 static int mspro_block_wait_for_ced(struct memstick_dev *card)
782 {
783 struct mspro_block_data *msb = memstick_get_drvdata(card);
784
785 card->next_request = h_mspro_block_req_init;
786 msb->mrq_handler = h_mspro_block_wait_for_ced;
787 memstick_init_req(&card->current_mrq, MS_TPC_GET_INT, NULL, 1);
788 memstick_new_req(card->host);
789 wait_for_completion(&card->mrq_complete);
790 return card->current_mrq.error;
791 }
792
mspro_block_set_interface(struct memstick_dev * card,unsigned char sys_reg)793 static int mspro_block_set_interface(struct memstick_dev *card,
794 unsigned char sys_reg)
795 {
796 struct memstick_host *host = card->host;
797 struct mspro_block_data *msb = memstick_get_drvdata(card);
798 struct mspro_param_register param = {
799 .system = sys_reg,
800 .data_count = 0,
801 .data_address = 0,
802 .tpc_param = 0
803 };
804
805 card->next_request = h_mspro_block_req_init;
806 msb->mrq_handler = h_mspro_block_default;
807 memstick_init_req(&card->current_mrq, MS_TPC_WRITE_REG, ¶m,
808 sizeof(param));
809 memstick_new_req(host);
810 wait_for_completion(&card->mrq_complete);
811 return card->current_mrq.error;
812 }
813
mspro_block_switch_interface(struct memstick_dev * card)814 static int mspro_block_switch_interface(struct memstick_dev *card)
815 {
816 struct memstick_host *host = card->host;
817 struct mspro_block_data *msb = memstick_get_drvdata(card);
818 int rc = 0;
819
820 try_again:
821 if (msb->caps & MEMSTICK_CAP_PAR4)
822 rc = mspro_block_set_interface(card, MEMSTICK_SYS_PAR4);
823 else
824 return 0;
825
826 if (rc) {
827 printk(KERN_WARNING
828 "%s: could not switch to 4-bit mode, error %d\n",
829 dev_name(&card->dev), rc);
830 return 0;
831 }
832
833 msb->system = MEMSTICK_SYS_PAR4;
834 host->set_param(host, MEMSTICK_INTERFACE, MEMSTICK_PAR4);
835 printk(KERN_INFO "%s: switching to 4-bit parallel mode\n",
836 dev_name(&card->dev));
837
838 if (msb->caps & MEMSTICK_CAP_PAR8) {
839 rc = mspro_block_set_interface(card, MEMSTICK_SYS_PAR8);
840
841 if (!rc) {
842 msb->system = MEMSTICK_SYS_PAR8;
843 host->set_param(host, MEMSTICK_INTERFACE,
844 MEMSTICK_PAR8);
845 printk(KERN_INFO
846 "%s: switching to 8-bit parallel mode\n",
847 dev_name(&card->dev));
848 } else
849 printk(KERN_WARNING
850 "%s: could not switch to 8-bit mode, error %d\n",
851 dev_name(&card->dev), rc);
852 }
853
854 card->next_request = h_mspro_block_req_init;
855 msb->mrq_handler = h_mspro_block_default;
856 memstick_init_req(&card->current_mrq, MS_TPC_GET_INT, NULL, 1);
857 memstick_new_req(card->host);
858 wait_for_completion(&card->mrq_complete);
859 rc = card->current_mrq.error;
860
861 if (rc) {
862 printk(KERN_WARNING
863 "%s: interface error, trying to fall back to serial\n",
864 dev_name(&card->dev));
865 msb->system = MEMSTICK_SYS_SERIAL;
866 host->set_param(host, MEMSTICK_POWER, MEMSTICK_POWER_OFF);
867 msleep(10);
868 host->set_param(host, MEMSTICK_POWER, MEMSTICK_POWER_ON);
869 host->set_param(host, MEMSTICK_INTERFACE, MEMSTICK_SERIAL);
870
871 rc = memstick_set_rw_addr(card);
872 if (!rc)
873 rc = mspro_block_set_interface(card, msb->system);
874
875 if (!rc) {
876 msleep(150);
877 rc = mspro_block_wait_for_ced(card);
878 if (rc)
879 return rc;
880
881 if (msb->caps & MEMSTICK_CAP_PAR8) {
882 msb->caps &= ~MEMSTICK_CAP_PAR8;
883 goto try_again;
884 }
885 }
886 }
887 return rc;
888 }
889
890 /* Memory allocated for attributes by this function should be freed by
891 * mspro_block_data_clear, no matter if the initialization process succeeded
892 * or failed.
893 */
mspro_block_read_attributes(struct memstick_dev * card)894 static int mspro_block_read_attributes(struct memstick_dev *card)
895 {
896 struct mspro_block_data *msb = memstick_get_drvdata(card);
897 struct mspro_attribute *attr = NULL;
898 struct mspro_sys_attr *s_attr = NULL;
899 unsigned char *buffer = NULL;
900 int cnt, rc, attr_count;
901 /* While normally physical device offsets, represented here by
902 * attr_offset and attr_len will be of large numeric types, we can be
903 * sure, that attributes are close enough to the beginning of the
904 * device, to save ourselves some trouble.
905 */
906 unsigned int addr, attr_offset = 0, attr_len = msb->page_size;
907
908 attr = kmalloc(msb->page_size, GFP_KERNEL);
909 if (!attr)
910 return -ENOMEM;
911
912 sg_init_one(&msb->req_sg[0], attr, msb->page_size);
913 msb->seg_count = 1;
914 msb->current_seg = 0;
915 msb->current_page = 0;
916 msb->data_dir = READ;
917 msb->transfer_cmd = MSPRO_CMD_READ_ATRB;
918
919 msb->setup_transfer(card, attr_offset, attr_len);
920
921 memstick_new_req(card->host);
922 wait_for_completion(&card->mrq_complete);
923 if (card->current_mrq.error) {
924 rc = card->current_mrq.error;
925 goto out_free_attr;
926 }
927
928 if (be16_to_cpu(attr->signature) != MSPRO_BLOCK_SIGNATURE) {
929 printk(KERN_ERR "%s: unrecognized device signature %x\n",
930 dev_name(&card->dev), be16_to_cpu(attr->signature));
931 rc = -ENODEV;
932 goto out_free_attr;
933 }
934
935 if (attr->count > MSPRO_BLOCK_MAX_ATTRIBUTES) {
936 printk(KERN_WARNING "%s: way too many attribute entries\n",
937 dev_name(&card->dev));
938 attr_count = MSPRO_BLOCK_MAX_ATTRIBUTES;
939 } else
940 attr_count = attr->count;
941
942 msb->attr_group.attrs = kcalloc(attr_count + 1,
943 sizeof(*msb->attr_group.attrs),
944 GFP_KERNEL);
945 if (!msb->attr_group.attrs) {
946 rc = -ENOMEM;
947 goto out_free_attr;
948 }
949 msb->attr_group.name = "media_attributes";
950
951 buffer = kmemdup(attr, attr_len, GFP_KERNEL);
952 if (!buffer) {
953 rc = -ENOMEM;
954 goto out_free_attr;
955 }
956
957 for (cnt = 0; cnt < attr_count; ++cnt) {
958 s_attr = kzalloc(sizeof(struct mspro_sys_attr), GFP_KERNEL);
959 if (!s_attr) {
960 rc = -ENOMEM;
961 goto out_free_buffer;
962 }
963
964 msb->attr_group.attrs[cnt] = &s_attr->dev_attr.attr;
965 addr = be32_to_cpu(attr->entries[cnt].address);
966 s_attr->size = be32_to_cpu(attr->entries[cnt].size);
967 dev_dbg(&card->dev, "adding attribute %d: id %x, address %x, "
968 "size %zx\n", cnt, attr->entries[cnt].id, addr,
969 s_attr->size);
970 s_attr->id = attr->entries[cnt].id;
971 if (mspro_block_attr_name(s_attr->id))
972 snprintf(s_attr->name, sizeof(s_attr->name), "%s",
973 mspro_block_attr_name(attr->entries[cnt].id));
974 else
975 snprintf(s_attr->name, sizeof(s_attr->name),
976 "attr_x%02x", attr->entries[cnt].id);
977
978 sysfs_attr_init(&s_attr->dev_attr.attr);
979 s_attr->dev_attr.attr.name = s_attr->name;
980 s_attr->dev_attr.attr.mode = S_IRUGO;
981 s_attr->dev_attr.show = mspro_block_attr_show(s_attr->id);
982
983 if (!s_attr->size)
984 continue;
985
986 s_attr->data = kmalloc(s_attr->size, GFP_KERNEL);
987 if (!s_attr->data) {
988 rc = -ENOMEM;
989 goto out_free_buffer;
990 }
991
992 if (((addr / msb->page_size) == (attr_offset / msb->page_size))
993 && (((addr + s_attr->size - 1) / msb->page_size)
994 == (attr_offset / msb->page_size))) {
995 memcpy(s_attr->data, buffer + addr % msb->page_size,
996 s_attr->size);
997 continue;
998 }
999
1000 attr_offset = (addr / msb->page_size) * msb->page_size;
1001
1002 if ((attr_offset + attr_len) < (addr + s_attr->size)) {
1003 kfree(buffer);
1004 attr_len = (((addr + s_attr->size) / msb->page_size)
1005 + 1 ) * msb->page_size - attr_offset;
1006 buffer = kmalloc(attr_len, GFP_KERNEL);
1007 if (!buffer) {
1008 rc = -ENOMEM;
1009 goto out_free_attr;
1010 }
1011 }
1012
1013 sg_init_one(&msb->req_sg[0], buffer, attr_len);
1014 msb->seg_count = 1;
1015 msb->current_seg = 0;
1016 msb->current_page = 0;
1017 msb->data_dir = READ;
1018 msb->transfer_cmd = MSPRO_CMD_READ_ATRB;
1019
1020 dev_dbg(&card->dev, "reading attribute range %x, %x\n",
1021 attr_offset, attr_len);
1022
1023 msb->setup_transfer(card, attr_offset, attr_len);
1024 memstick_new_req(card->host);
1025 wait_for_completion(&card->mrq_complete);
1026 if (card->current_mrq.error) {
1027 rc = card->current_mrq.error;
1028 goto out_free_buffer;
1029 }
1030
1031 memcpy(s_attr->data, buffer + addr % msb->page_size,
1032 s_attr->size);
1033 }
1034
1035 rc = 0;
1036 out_free_buffer:
1037 kfree(buffer);
1038 out_free_attr:
1039 kfree(attr);
1040 return rc;
1041 }
1042
mspro_block_init_card(struct memstick_dev * card)1043 static int mspro_block_init_card(struct memstick_dev *card)
1044 {
1045 struct mspro_block_data *msb = memstick_get_drvdata(card);
1046 struct memstick_host *host = card->host;
1047 int rc = 0;
1048
1049 msb->system = MEMSTICK_SYS_SERIAL;
1050 msb->setup_transfer = h_mspro_block_setup_cmd;
1051
1052 card->reg_addr.r_offset = offsetof(struct mspro_register, status);
1053 card->reg_addr.r_length = sizeof(struct ms_status_register);
1054 card->reg_addr.w_offset = offsetof(struct mspro_register, param);
1055 card->reg_addr.w_length = sizeof(struct mspro_param_register);
1056
1057 if (memstick_set_rw_addr(card))
1058 return -EIO;
1059
1060 msb->caps = host->caps;
1061
1062 msleep(150);
1063 rc = mspro_block_wait_for_ced(card);
1064 if (rc)
1065 return rc;
1066
1067 rc = mspro_block_switch_interface(card);
1068 if (rc)
1069 return rc;
1070
1071 dev_dbg(&card->dev, "card activated\n");
1072 if (msb->system != MEMSTICK_SYS_SERIAL)
1073 msb->caps |= MEMSTICK_CAP_AUTO_GET_INT;
1074
1075 card->next_request = h_mspro_block_req_init;
1076 msb->mrq_handler = h_mspro_block_get_ro;
1077 memstick_init_req(&card->current_mrq, MS_TPC_READ_REG, NULL,
1078 sizeof(struct ms_status_register));
1079 memstick_new_req(card->host);
1080 wait_for_completion(&card->mrq_complete);
1081 if (card->current_mrq.error)
1082 return card->current_mrq.error;
1083
1084 dev_dbg(&card->dev, "card r/w status %d\n", msb->read_only ? 0 : 1);
1085
1086 msb->page_size = 512;
1087 rc = mspro_block_read_attributes(card);
1088 if (rc)
1089 return rc;
1090
1091 dev_dbg(&card->dev, "attributes loaded\n");
1092 return 0;
1093
1094 }
1095
1096 static const struct blk_mq_ops mspro_mq_ops = {
1097 .queue_rq = mspro_queue_rq,
1098 };
1099
mspro_block_init_disk(struct memstick_dev * card)1100 static int mspro_block_init_disk(struct memstick_dev *card)
1101 {
1102 struct mspro_block_data *msb = memstick_get_drvdata(card);
1103 struct queue_limits lim = {
1104 .logical_block_size = msb->page_size,
1105 .max_hw_sectors = MSPRO_BLOCK_MAX_PAGES,
1106 .max_segments = MSPRO_BLOCK_MAX_SEGS,
1107 .max_segment_size = MSPRO_BLOCK_MAX_PAGES * msb->page_size,
1108 };
1109 struct mspro_devinfo *dev_info = NULL;
1110 struct mspro_sys_info *sys_info = NULL;
1111 struct mspro_sys_attr *s_attr = NULL;
1112 int rc, disk_id;
1113 unsigned long capacity;
1114
1115 for (rc = 0; msb->attr_group.attrs[rc]; ++rc) {
1116 s_attr = mspro_from_sysfs_attr(msb->attr_group.attrs[rc]);
1117
1118 if (s_attr->id == MSPRO_BLOCK_ID_DEVINFO)
1119 dev_info = s_attr->data;
1120 else if (s_attr->id == MSPRO_BLOCK_ID_SYSINFO)
1121 sys_info = s_attr->data;
1122 }
1123
1124 if (!dev_info || !sys_info)
1125 return -ENODEV;
1126
1127 msb->cylinders = be16_to_cpu(dev_info->cylinders);
1128 msb->heads = be16_to_cpu(dev_info->heads);
1129 msb->sectors_per_track = be16_to_cpu(dev_info->sectors_per_track);
1130
1131 msb->page_size = be16_to_cpu(sys_info->unit_size);
1132
1133 mutex_lock(&mspro_block_disk_lock);
1134 disk_id = idr_alloc(&mspro_block_disk_idr, card, 0, 256, GFP_KERNEL);
1135 mutex_unlock(&mspro_block_disk_lock);
1136 if (disk_id < 0)
1137 return disk_id;
1138
1139 rc = blk_mq_alloc_sq_tag_set(&msb->tag_set, &mspro_mq_ops, 2, 0);
1140 if (rc)
1141 goto out_release_id;
1142
1143 msb->disk = blk_mq_alloc_disk(&msb->tag_set, &lim, card);
1144 if (IS_ERR(msb->disk)) {
1145 rc = PTR_ERR(msb->disk);
1146 goto out_free_tag_set;
1147 }
1148 msb->queue = msb->disk->queue;
1149
1150 msb->disk->major = major;
1151 msb->disk->first_minor = disk_id << MSPRO_BLOCK_PART_SHIFT;
1152 msb->disk->minors = 1 << MSPRO_BLOCK_PART_SHIFT;
1153 msb->disk->fops = &ms_block_bdops;
1154 msb->disk->private_data = msb;
1155
1156 sprintf(msb->disk->disk_name, "mspblk%d", disk_id);
1157
1158 capacity = be16_to_cpu(sys_info->user_block_count);
1159 capacity *= be16_to_cpu(sys_info->block_size);
1160 capacity *= msb->page_size >> 9;
1161 set_capacity(msb->disk, capacity);
1162 dev_dbg(&card->dev, "capacity set %ld\n", capacity);
1163
1164 if (msb->read_only)
1165 set_disk_ro(msb->disk, true);
1166
1167 rc = device_add_disk(&card->dev, msb->disk, NULL);
1168 if (rc)
1169 goto out_cleanup_disk;
1170 msb->active = 1;
1171 return 0;
1172
1173 out_cleanup_disk:
1174 put_disk(msb->disk);
1175 out_free_tag_set:
1176 blk_mq_free_tag_set(&msb->tag_set);
1177 out_release_id:
1178 mutex_lock(&mspro_block_disk_lock);
1179 idr_remove(&mspro_block_disk_idr, disk_id);
1180 mutex_unlock(&mspro_block_disk_lock);
1181 return rc;
1182 }
1183
mspro_block_data_clear(struct mspro_block_data * msb)1184 static void mspro_block_data_clear(struct mspro_block_data *msb)
1185 {
1186 int cnt;
1187 struct mspro_sys_attr *s_attr;
1188
1189 if (msb->attr_group.attrs) {
1190 for (cnt = 0; msb->attr_group.attrs[cnt]; ++cnt) {
1191 s_attr = mspro_from_sysfs_attr(msb->attr_group
1192 .attrs[cnt]);
1193 kfree(s_attr->data);
1194 kfree(s_attr);
1195 }
1196 kfree(msb->attr_group.attrs);
1197 }
1198
1199 msb->card = NULL;
1200 }
1201
mspro_block_check_card(struct memstick_dev * card)1202 static int mspro_block_check_card(struct memstick_dev *card)
1203 {
1204 struct mspro_block_data *msb = memstick_get_drvdata(card);
1205
1206 return (msb->active == 1);
1207 }
1208
mspro_block_probe(struct memstick_dev * card)1209 static int mspro_block_probe(struct memstick_dev *card)
1210 {
1211 struct mspro_block_data *msb;
1212 int rc = 0;
1213
1214 msb = kzalloc(sizeof(struct mspro_block_data), GFP_KERNEL);
1215 if (!msb)
1216 return -ENOMEM;
1217 memstick_set_drvdata(card, msb);
1218 msb->card = card;
1219 spin_lock_init(&msb->q_lock);
1220
1221 rc = mspro_block_init_card(card);
1222
1223 if (rc)
1224 goto out_free;
1225
1226 rc = sysfs_create_group(&card->dev.kobj, &msb->attr_group);
1227 if (rc)
1228 goto out_free;
1229
1230 rc = mspro_block_init_disk(card);
1231 if (!rc) {
1232 card->check = mspro_block_check_card;
1233 card->stop = mspro_block_stop;
1234 card->start = mspro_block_start;
1235 return 0;
1236 }
1237
1238 sysfs_remove_group(&card->dev.kobj, &msb->attr_group);
1239 out_free:
1240 memstick_set_drvdata(card, NULL);
1241 mspro_block_data_clear(msb);
1242 kfree(msb);
1243 return rc;
1244 }
1245
mspro_block_remove(struct memstick_dev * card)1246 static void mspro_block_remove(struct memstick_dev *card)
1247 {
1248 struct mspro_block_data *msb = memstick_get_drvdata(card);
1249 unsigned long flags;
1250
1251 spin_lock_irqsave(&msb->q_lock, flags);
1252 msb->eject = 1;
1253 spin_unlock_irqrestore(&msb->q_lock, flags);
1254 blk_mq_start_hw_queues(msb->queue);
1255
1256 del_gendisk(msb->disk);
1257 dev_dbg(&card->dev, "mspro block remove\n");
1258
1259 blk_mq_free_tag_set(&msb->tag_set);
1260 msb->queue = NULL;
1261
1262 sysfs_remove_group(&card->dev.kobj, &msb->attr_group);
1263
1264 mutex_lock(&mspro_block_disk_lock);
1265 mspro_block_data_clear(msb);
1266 mutex_unlock(&mspro_block_disk_lock);
1267
1268 put_disk(msb->disk);
1269 memstick_set_drvdata(card, NULL);
1270 }
1271
1272 #ifdef CONFIG_PM
1273
mspro_block_suspend(struct memstick_dev * card,pm_message_t state)1274 static int mspro_block_suspend(struct memstick_dev *card, pm_message_t state)
1275 {
1276 struct mspro_block_data *msb = memstick_get_drvdata(card);
1277 unsigned long flags;
1278
1279 blk_mq_stop_hw_queues(msb->queue);
1280
1281 spin_lock_irqsave(&msb->q_lock, flags);
1282 msb->active = 0;
1283 spin_unlock_irqrestore(&msb->q_lock, flags);
1284
1285 return 0;
1286 }
1287
mspro_block_resume(struct memstick_dev * card)1288 static int mspro_block_resume(struct memstick_dev *card)
1289 {
1290 struct mspro_block_data *msb = memstick_get_drvdata(card);
1291 int rc = 0;
1292
1293 #ifdef CONFIG_MEMSTICK_UNSAFE_RESUME
1294
1295 struct mspro_block_data *new_msb;
1296 struct memstick_host *host = card->host;
1297 struct mspro_sys_attr *s_attr, *r_attr;
1298 unsigned char cnt;
1299
1300 mutex_lock(&host->lock);
1301 new_msb = kzalloc(sizeof(struct mspro_block_data), GFP_KERNEL);
1302 if (!new_msb) {
1303 rc = -ENOMEM;
1304 goto out_unlock;
1305 }
1306
1307 new_msb->card = card;
1308 memstick_set_drvdata(card, new_msb);
1309 rc = mspro_block_init_card(card);
1310 if (rc)
1311 goto out_free;
1312
1313 for (cnt = 0; new_msb->attr_group.attrs[cnt]
1314 && msb->attr_group.attrs[cnt]; ++cnt) {
1315 s_attr = mspro_from_sysfs_attr(new_msb->attr_group.attrs[cnt]);
1316 r_attr = mspro_from_sysfs_attr(msb->attr_group.attrs[cnt]);
1317
1318 if (s_attr->id == MSPRO_BLOCK_ID_SYSINFO
1319 && r_attr->id == s_attr->id) {
1320 if (memcmp(s_attr->data, r_attr->data, s_attr->size))
1321 break;
1322
1323 msb->active = 1;
1324 break;
1325 }
1326 }
1327
1328 out_free:
1329 memstick_set_drvdata(card, msb);
1330 mspro_block_data_clear(new_msb);
1331 kfree(new_msb);
1332 out_unlock:
1333 mutex_unlock(&host->lock);
1334
1335 #endif /* CONFIG_MEMSTICK_UNSAFE_RESUME */
1336
1337 blk_mq_start_hw_queues(msb->queue);
1338 return rc;
1339 }
1340
1341 #else
1342
1343 #define mspro_block_suspend NULL
1344 #define mspro_block_resume NULL
1345
1346 #endif /* CONFIG_PM */
1347
1348 static const struct memstick_device_id mspro_block_id_tbl[] = {
1349 {MEMSTICK_MATCH_ALL, MEMSTICK_TYPE_PRO, MEMSTICK_CATEGORY_STORAGE_DUO,
1350 MEMSTICK_CLASS_DUO},
1351 {}
1352 };
1353
1354
1355 static struct memstick_driver mspro_block_driver = {
1356 .driver = {
1357 .name = DRIVER_NAME,
1358 .owner = THIS_MODULE
1359 },
1360 .id_table = mspro_block_id_tbl,
1361 .probe = mspro_block_probe,
1362 .remove = mspro_block_remove,
1363 .suspend = mspro_block_suspend,
1364 .resume = mspro_block_resume
1365 };
1366
mspro_block_init(void)1367 static int __init mspro_block_init(void)
1368 {
1369 int rc = -ENOMEM;
1370
1371 rc = register_blkdev(major, DRIVER_NAME);
1372 if (rc < 0) {
1373 printk(KERN_ERR DRIVER_NAME ": failed to register "
1374 "major %d, error %d\n", major, rc);
1375 return rc;
1376 }
1377 if (!major)
1378 major = rc;
1379
1380 rc = memstick_register_driver(&mspro_block_driver);
1381 if (rc)
1382 unregister_blkdev(major, DRIVER_NAME);
1383 return rc;
1384 }
1385
mspro_block_exit(void)1386 static void __exit mspro_block_exit(void)
1387 {
1388 memstick_unregister_driver(&mspro_block_driver);
1389 unregister_blkdev(major, DRIVER_NAME);
1390 idr_destroy(&mspro_block_disk_idr);
1391 }
1392
1393 module_init(mspro_block_init);
1394 module_exit(mspro_block_exit);
1395
1396 MODULE_LICENSE("GPL");
1397 MODULE_AUTHOR("Alex Dubov");
1398 MODULE_DESCRIPTION("Sony MemoryStickPro block device driver");
1399 MODULE_DEVICE_TABLE(memstick, mspro_block_id_tbl);
1400