Linux Kernel  3.7.1
 All Data Structures Namespaces Files Functions Variables Typedefs Enumerations Enumerator Macros Groups Pages
mspro_block.c
Go to the documentation of this file.
1 /*
2  * Sony MemoryStick Pro storage support
3  *
4  * Copyright (C) 2007 Alex Dubov <[email protected]>
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 
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);
Generated on Thu Jan 10 2013 13:53:06 for Linux Kernel by   doxygen 1.8.2