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 block_device * bdev,struct hd_geometry * geo)192 static int mspro_block_bd_getgeo(struct block_device *bdev,
193 				 struct hd_geometry *geo)
194 {
195 	struct mspro_block_data *msb = bdev->bd_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 += scnprintf(buffer + rc, PAGE_SIZE - 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 += scnprintf(buffer + rc, PAGE_SIZE - rc, "class: %x\n",
294 			x_sys->class);
295 	rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "block size: %x\n",
296 			be16_to_cpu(x_sys->block_size));
297 	rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "block count: %x\n",
298 			be16_to_cpu(x_sys->block_count));
299 	rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "user block count: %x\n",
300 			be16_to_cpu(x_sys->user_block_count));
301 	rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "page size: %x\n",
302 			be16_to_cpu(x_sys->page_size));
303 	rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "assembly date: "
304 			"GMT%+d:%d %04u-%02u-%02u %02u:%02u:%02u\n",
305 			date_tz, date_tz_f,
306 			be16_to_cpup((__be16 *)&x_sys->assembly_date[1]),
307 			x_sys->assembly_date[3], x_sys->assembly_date[4],
308 			x_sys->assembly_date[5], x_sys->assembly_date[6],
309 			x_sys->assembly_date[7]);
310 	rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "serial number: %x\n",
311 			be32_to_cpu(x_sys->serial_number));
312 	rc += scnprintf(buffer + rc, PAGE_SIZE - rc,
313 			"assembly maker code: %x\n",
314 			x_sys->assembly_maker_code);
315 	rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "assembly model code: "
316 			"%02x%02x%02x\n", x_sys->assembly_model_code[0],
317 			x_sys->assembly_model_code[1],
318 			x_sys->assembly_model_code[2]);
319 	rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "memory maker code: %x\n",
320 			be16_to_cpu(x_sys->memory_maker_code));
321 	rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "memory model code: %x\n",
322 			be16_to_cpu(x_sys->memory_model_code));
323 	rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "vcc: %x\n",
324 			x_sys->vcc);
325 	rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "vpp: %x\n",
326 			x_sys->vpp);
327 	rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "controller number: %x\n",
328 			be16_to_cpu(x_sys->controller_number));
329 	rc += scnprintf(buffer + rc, PAGE_SIZE - rc,
330 			"controller function: %x\n",
331 			be16_to_cpu(x_sys->controller_function));
332 	rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "start sector: %x\n",
333 			be16_to_cpu(x_sys->start_sector));
334 	rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "unit size: %x\n",
335 			be16_to_cpu(x_sys->unit_size));
336 	rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "sub class: %x\n",
337 			x_sys->ms_sub_class);
338 	rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "interface type: %x\n",
339 			x_sys->interface_type);
340 	rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "controller code: %x\n",
341 			be16_to_cpu(x_sys->controller_code));
342 	rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "format type: %x\n",
343 			x_sys->format_type);
344 	rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "device type: %x\n",
345 			x_sys->device_type);
346 	rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "mspro id: %s\n",
347 			x_sys->mspro_id);
348 	return rc;
349 }
350 
mspro_block_attr_show_modelname(struct device * dev,struct device_attribute * attr,char * buffer)351 static ssize_t mspro_block_attr_show_modelname(struct device *dev,
352 					       struct device_attribute *attr,
353 					       char *buffer)
354 {
355 	struct mspro_sys_attr *s_attr = container_of(attr,
356 						     struct mspro_sys_attr,
357 						     dev_attr);
358 
359 	return scnprintf(buffer, PAGE_SIZE, "%s", (char *)s_attr->data);
360 }
361 
mspro_block_attr_show_mbr(struct device * dev,struct device_attribute * attr,char * buffer)362 static ssize_t mspro_block_attr_show_mbr(struct device *dev,
363 					 struct device_attribute *attr,
364 					 char *buffer)
365 {
366 	struct mspro_sys_attr *x_attr = container_of(attr,
367 						     struct mspro_sys_attr,
368 						     dev_attr);
369 	struct mspro_mbr *x_mbr = x_attr->data;
370 	ssize_t rc = 0;
371 
372 	rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "boot partition: %x\n",
373 			x_mbr->boot_partition);
374 	rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "start head: %x\n",
375 			x_mbr->start_head);
376 	rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "start sector: %x\n",
377 			x_mbr->start_sector);
378 	rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "start cylinder: %x\n",
379 			x_mbr->start_cylinder);
380 	rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "partition type: %x\n",
381 			x_mbr->partition_type);
382 	rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "end head: %x\n",
383 			x_mbr->end_head);
384 	rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "end sector: %x\n",
385 			x_mbr->end_sector);
386 	rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "end cylinder: %x\n",
387 			x_mbr->end_cylinder);
388 	rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "start sectors: %x\n",
389 			x_mbr->start_sectors);
390 	rc += scnprintf(buffer + rc, PAGE_SIZE - rc,
391 			"sectors per partition: %x\n",
392 			x_mbr->sectors_per_partition);
393 	return rc;
394 }
395 
mspro_block_attr_show_specfile(struct device * dev,struct device_attribute * attr,char * buffer)396 static ssize_t mspro_block_attr_show_specfile(struct device *dev,
397 					      struct device_attribute *attr,
398 					      char *buffer)
399 {
400 	struct mspro_sys_attr *x_attr = container_of(attr,
401 						     struct mspro_sys_attr,
402 						     dev_attr);
403 	struct mspro_specfile *x_spfile = x_attr->data;
404 	char name[9], ext[4];
405 	ssize_t rc = 0;
406 
407 	memcpy(name, x_spfile->name, 8);
408 	name[8] = 0;
409 	memcpy(ext, x_spfile->ext, 3);
410 	ext[3] = 0;
411 
412 	rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "name: %s\n", name);
413 	rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "ext: %s\n", ext);
414 	rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "attribute: %x\n",
415 			x_spfile->attr);
416 	rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "time: %d:%d:%d\n",
417 			x_spfile->time >> 11,
418 			(x_spfile->time >> 5) & 0x3f,
419 			(x_spfile->time & 0x1f) * 2);
420 	rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "date: %d-%d-%d\n",
421 			(x_spfile->date >> 9) + 1980,
422 			(x_spfile->date >> 5) & 0xf,
423 			x_spfile->date & 0x1f);
424 	rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "start cluster: %x\n",
425 			x_spfile->cluster);
426 	rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "size: %x\n",
427 			x_spfile->size);
428 	return rc;
429 }
430 
mspro_block_attr_show_devinfo(struct device * dev,struct device_attribute * attr,char * buffer)431 static ssize_t mspro_block_attr_show_devinfo(struct device *dev,
432 					     struct device_attribute *attr,
433 					     char *buffer)
434 {
435 	struct mspro_sys_attr *x_attr = container_of(attr,
436 						     struct mspro_sys_attr,
437 						     dev_attr);
438 	struct mspro_devinfo *x_devinfo = x_attr->data;
439 	ssize_t rc = 0;
440 
441 	rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "cylinders: %x\n",
442 			be16_to_cpu(x_devinfo->cylinders));
443 	rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "heads: %x\n",
444 			be16_to_cpu(x_devinfo->heads));
445 	rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "bytes per track: %x\n",
446 			be16_to_cpu(x_devinfo->bytes_per_track));
447 	rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "bytes per sector: %x\n",
448 			be16_to_cpu(x_devinfo->bytes_per_sector));
449 	rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "sectors per track: %x\n",
450 			be16_to_cpu(x_devinfo->sectors_per_track));
451 	return rc;
452 }
453 
mspro_block_attr_show(unsigned char tag)454 static sysfs_show_t mspro_block_attr_show(unsigned char tag)
455 {
456 	switch (tag) {
457 	case MSPRO_BLOCK_ID_SYSINFO:
458 		return mspro_block_attr_show_sysinfo;
459 	case MSPRO_BLOCK_ID_MODELNAME:
460 		return mspro_block_attr_show_modelname;
461 	case MSPRO_BLOCK_ID_MBR:
462 		return mspro_block_attr_show_mbr;
463 	case MSPRO_BLOCK_ID_SPECFILEVALUES1:
464 	case MSPRO_BLOCK_ID_SPECFILEVALUES2:
465 		return mspro_block_attr_show_specfile;
466 	case MSPRO_BLOCK_ID_DEVINFO:
467 		return mspro_block_attr_show_devinfo;
468 	default:
469 		return mspro_block_attr_show_default;
470 	}
471 }
472 
473 /*** Protocol handlers ***/
474 
475 /*
476  * Functions prefixed with "h_" are protocol callbacks. They can be called from
477  * interrupt context. Return value of 0 means that request processing is still
478  * ongoing, while special error value of -EAGAIN means that current request is
479  * finished (and request processor should come back some time later).
480  */
481 
h_mspro_block_req_init(struct memstick_dev * card,struct memstick_request ** mrq)482 static int h_mspro_block_req_init(struct memstick_dev *card,
483 				  struct memstick_request **mrq)
484 {
485 	struct mspro_block_data *msb = memstick_get_drvdata(card);
486 
487 	*mrq = &card->current_mrq;
488 	card->next_request = msb->mrq_handler;
489 	return 0;
490 }
491 
h_mspro_block_default(struct memstick_dev * card,struct memstick_request ** mrq)492 static int h_mspro_block_default(struct memstick_dev *card,
493 				 struct memstick_request **mrq)
494 {
495 	return mspro_block_complete_req(card, (*mrq)->error);
496 }
497 
h_mspro_block_default_bad(struct memstick_dev * card,struct memstick_request ** mrq)498 static int h_mspro_block_default_bad(struct memstick_dev *card,
499 				     struct memstick_request **mrq)
500 {
501 	return -ENXIO;
502 }
503 
h_mspro_block_get_ro(struct memstick_dev * card,struct memstick_request ** mrq)504 static int h_mspro_block_get_ro(struct memstick_dev *card,
505 				struct memstick_request **mrq)
506 {
507 	struct mspro_block_data *msb = memstick_get_drvdata(card);
508 
509 	if (!(*mrq)->error) {
510 		if ((*mrq)->data[offsetof(struct ms_status_register, status0)]
511 		    & MEMSTICK_STATUS0_WP)
512 			msb->read_only = 1;
513 		else
514 			msb->read_only = 0;
515 	}
516 
517 	return mspro_block_complete_req(card, (*mrq)->error);
518 }
519 
h_mspro_block_wait_for_ced(struct memstick_dev * card,struct memstick_request ** mrq)520 static int h_mspro_block_wait_for_ced(struct memstick_dev *card,
521 				      struct memstick_request **mrq)
522 {
523 	dev_dbg(&card->dev, "wait for ced: value %x\n", (*mrq)->data[0]);
524 
525 	if (!(*mrq)->error) {
526 		if ((*mrq)->data[0] & (MEMSTICK_INT_CMDNAK | MEMSTICK_INT_ERR))
527 			(*mrq)->error = -EFAULT;
528 		else if (!((*mrq)->data[0] & MEMSTICK_INT_CED))
529 			return 0;
530 	}
531 
532 	return mspro_block_complete_req(card, (*mrq)->error);
533 }
534 
h_mspro_block_transfer_data(struct memstick_dev * card,struct memstick_request ** mrq)535 static int h_mspro_block_transfer_data(struct memstick_dev *card,
536 				       struct memstick_request **mrq)
537 {
538 	struct mspro_block_data *msb = memstick_get_drvdata(card);
539 	unsigned char t_val = 0;
540 	struct scatterlist t_sg = { 0 };
541 	size_t t_offset;
542 
543 	if ((*mrq)->error)
544 		return mspro_block_complete_req(card, (*mrq)->error);
545 
546 	switch ((*mrq)->tpc) {
547 	case MS_TPC_WRITE_REG:
548 		memstick_init_req(*mrq, MS_TPC_SET_CMD, &msb->transfer_cmd, 1);
549 		(*mrq)->need_card_int = 1;
550 		return 0;
551 	case MS_TPC_SET_CMD:
552 		t_val = (*mrq)->int_reg;
553 		memstick_init_req(*mrq, MS_TPC_GET_INT, NULL, 1);
554 		if (msb->caps & MEMSTICK_CAP_AUTO_GET_INT)
555 			goto has_int_reg;
556 		return 0;
557 	case MS_TPC_GET_INT:
558 		t_val = (*mrq)->data[0];
559 has_int_reg:
560 		if (t_val & (MEMSTICK_INT_CMDNAK | MEMSTICK_INT_ERR)) {
561 			t_val = MSPRO_CMD_STOP;
562 			memstick_init_req(*mrq, MS_TPC_SET_CMD, &t_val, 1);
563 			card->next_request = h_mspro_block_default;
564 			return 0;
565 		}
566 
567 		if (msb->current_page
568 		    == (msb->req_sg[msb->current_seg].length
569 			/ msb->page_size)) {
570 			msb->current_page = 0;
571 			msb->current_seg++;
572 
573 			if (msb->current_seg == msb->seg_count) {
574 				if (t_val & MEMSTICK_INT_CED) {
575 					return mspro_block_complete_req(card,
576 									0);
577 				} else {
578 					card->next_request
579 						= h_mspro_block_wait_for_ced;
580 					memstick_init_req(*mrq, MS_TPC_GET_INT,
581 							  NULL, 1);
582 					return 0;
583 				}
584 			}
585 		}
586 
587 		if (!(t_val & MEMSTICK_INT_BREQ)) {
588 			memstick_init_req(*mrq, MS_TPC_GET_INT, NULL, 1);
589 			return 0;
590 		}
591 
592 		t_offset = msb->req_sg[msb->current_seg].offset;
593 		t_offset += msb->current_page * msb->page_size;
594 
595 		sg_set_page(&t_sg,
596 			    nth_page(sg_page(&(msb->req_sg[msb->current_seg])),
597 				     t_offset >> PAGE_SHIFT),
598 			    msb->page_size, offset_in_page(t_offset));
599 
600 		memstick_init_req_sg(*mrq, msb->data_dir == READ
601 					   ? MS_TPC_READ_LONG_DATA
602 					   : MS_TPC_WRITE_LONG_DATA,
603 				     &t_sg);
604 		(*mrq)->need_card_int = 1;
605 		return 0;
606 	case MS_TPC_READ_LONG_DATA:
607 	case MS_TPC_WRITE_LONG_DATA:
608 		msb->current_page++;
609 		if (msb->caps & MEMSTICK_CAP_AUTO_GET_INT) {
610 			t_val = (*mrq)->int_reg;
611 			goto has_int_reg;
612 		} else {
613 			memstick_init_req(*mrq, MS_TPC_GET_INT, NULL, 1);
614 			return 0;
615 		}
616 
617 	default:
618 		BUG();
619 	}
620 }
621 
622 /*** Transfer setup functions for different access methods. ***/
623 
624 /** Setup data transfer request for SET_CMD TPC with arguments in card
625  *  registers.
626  *
627  *  @card    Current media instance
628  *  @offset  Target data offset in bytes
629  *  @length  Required transfer length in bytes.
630  */
h_mspro_block_setup_cmd(struct memstick_dev * card,u64 offset,size_t length)631 static void h_mspro_block_setup_cmd(struct memstick_dev *card, u64 offset,
632 				    size_t length)
633 {
634 	struct mspro_block_data *msb = memstick_get_drvdata(card);
635 	struct mspro_param_register param = {
636 		.system = msb->system,
637 		.data_count = cpu_to_be16((uint16_t)(length / msb->page_size)),
638 		/* ISO C90 warning precludes direct initialization for now. */
639 		.data_address = 0,
640 		.tpc_param = 0
641 	};
642 
643 	do_div(offset, msb->page_size);
644 	param.data_address = cpu_to_be32((uint32_t)offset);
645 
646 	card->next_request = h_mspro_block_req_init;
647 	msb->mrq_handler = h_mspro_block_transfer_data;
648 	memstick_init_req(&card->current_mrq, MS_TPC_WRITE_REG,
649 			  &param, sizeof(param));
650 }
651 
652 /*** Data transfer ***/
653 
mspro_block_issue_req(struct memstick_dev * card)654 static int mspro_block_issue_req(struct memstick_dev *card)
655 {
656 	struct mspro_block_data *msb = memstick_get_drvdata(card);
657 	u64 t_off;
658 	unsigned int count;
659 
660 	while (true) {
661 		msb->current_page = 0;
662 		msb->current_seg = 0;
663 		msb->seg_count = blk_rq_map_sg(msb->block_req->q,
664 					       msb->block_req,
665 					       msb->req_sg);
666 
667 		if (!msb->seg_count) {
668 			unsigned int bytes = blk_rq_cur_bytes(msb->block_req);
669 			bool chunk;
670 
671 			chunk = blk_update_request(msb->block_req,
672 							BLK_STS_RESOURCE,
673 							bytes);
674 			if (chunk)
675 				continue;
676 			__blk_mq_end_request(msb->block_req,
677 						BLK_STS_RESOURCE);
678 			msb->block_req = NULL;
679 			return -EAGAIN;
680 		}
681 
682 		t_off = blk_rq_pos(msb->block_req);
683 		t_off <<= 9;
684 		count = blk_rq_bytes(msb->block_req);
685 
686 		msb->setup_transfer(card, t_off, count);
687 
688 		msb->data_dir = rq_data_dir(msb->block_req);
689 		msb->transfer_cmd = msb->data_dir == READ
690 				    ? MSPRO_CMD_READ_DATA
691 				    : MSPRO_CMD_WRITE_DATA;
692 
693 		memstick_new_req(card->host);
694 		return 0;
695 	}
696 }
697 
mspro_block_complete_req(struct memstick_dev * card,int error)698 static int mspro_block_complete_req(struct memstick_dev *card, int error)
699 {
700 	struct mspro_block_data *msb = memstick_get_drvdata(card);
701 	int cnt;
702 	bool chunk;
703 	unsigned int t_len = 0;
704 	unsigned long flags;
705 
706 	spin_lock_irqsave(&msb->q_lock, flags);
707 	dev_dbg(&card->dev, "complete %d, %d\n", msb->block_req ? 1 : 0,
708 		error);
709 
710 	if (msb->block_req) {
711 		/* Nothing to do - not really an error */
712 		if (error == -EAGAIN)
713 			error = 0;
714 
715 		if (error || (card->current_mrq.tpc == MSPRO_CMD_STOP)) {
716 			if (msb->data_dir == READ) {
717 				for (cnt = 0; cnt < msb->current_seg; cnt++) {
718 					t_len += msb->req_sg[cnt].length
719 						 / msb->page_size;
720 
721 					if (msb->current_page)
722 						t_len += msb->current_page - 1;
723 
724 					t_len *= msb->page_size;
725 				}
726 			}
727 		} else
728 			t_len = blk_rq_bytes(msb->block_req);
729 
730 		dev_dbg(&card->dev, "transferred %x (%d)\n", t_len, error);
731 
732 		if (error && !t_len)
733 			t_len = blk_rq_cur_bytes(msb->block_req);
734 
735 		chunk = blk_update_request(msb->block_req,
736 				errno_to_blk_status(error), t_len);
737 		if (chunk) {
738 			error = mspro_block_issue_req(card);
739 			if (!error)
740 				goto out;
741 		} else {
742 			__blk_mq_end_request(msb->block_req,
743 						errno_to_blk_status(error));
744 			msb->block_req = NULL;
745 		}
746 	} else {
747 		if (!error)
748 			error = -EAGAIN;
749 	}
750 
751 	card->next_request = h_mspro_block_default_bad;
752 	complete_all(&card->mrq_complete);
753 out:
754 	spin_unlock_irqrestore(&msb->q_lock, flags);
755 	return error;
756 }
757 
mspro_block_stop(struct memstick_dev * card)758 static void mspro_block_stop(struct memstick_dev *card)
759 {
760 	struct mspro_block_data *msb = memstick_get_drvdata(card);
761 	int rc = 0;
762 	unsigned long flags;
763 
764 	while (1) {
765 		spin_lock_irqsave(&msb->q_lock, flags);
766 		if (!msb->block_req) {
767 			blk_mq_stop_hw_queues(msb->queue);
768 			rc = 1;
769 		}
770 		spin_unlock_irqrestore(&msb->q_lock, flags);
771 
772 		if (rc)
773 			break;
774 
775 		wait_for_completion(&card->mrq_complete);
776 	}
777 }
778 
mspro_block_start(struct memstick_dev * card)779 static void mspro_block_start(struct memstick_dev *card)
780 {
781 	struct mspro_block_data *msb = memstick_get_drvdata(card);
782 
783 	blk_mq_start_hw_queues(msb->queue);
784 }
785 
mspro_queue_rq(struct blk_mq_hw_ctx * hctx,const struct blk_mq_queue_data * bd)786 static blk_status_t mspro_queue_rq(struct blk_mq_hw_ctx *hctx,
787 				   const struct blk_mq_queue_data *bd)
788 {
789 	struct memstick_dev *card = hctx->queue->queuedata;
790 	struct mspro_block_data *msb = memstick_get_drvdata(card);
791 
792 	spin_lock_irq(&msb->q_lock);
793 
794 	if (msb->block_req) {
795 		spin_unlock_irq(&msb->q_lock);
796 		return BLK_STS_DEV_RESOURCE;
797 	}
798 
799 	if (msb->eject) {
800 		spin_unlock_irq(&msb->q_lock);
801 		blk_mq_start_request(bd->rq);
802 		return BLK_STS_IOERR;
803 	}
804 
805 	msb->block_req = bd->rq;
806 	blk_mq_start_request(bd->rq);
807 
808 	if (mspro_block_issue_req(card))
809 		msb->block_req = NULL;
810 
811 	spin_unlock_irq(&msb->q_lock);
812 	return BLK_STS_OK;
813 }
814 
815 /*** Initialization ***/
816 
mspro_block_wait_for_ced(struct memstick_dev * card)817 static int mspro_block_wait_for_ced(struct memstick_dev *card)
818 {
819 	struct mspro_block_data *msb = memstick_get_drvdata(card);
820 
821 	card->next_request = h_mspro_block_req_init;
822 	msb->mrq_handler = h_mspro_block_wait_for_ced;
823 	memstick_init_req(&card->current_mrq, MS_TPC_GET_INT, NULL, 1);
824 	memstick_new_req(card->host);
825 	wait_for_completion(&card->mrq_complete);
826 	return card->current_mrq.error;
827 }
828 
mspro_block_set_interface(struct memstick_dev * card,unsigned char sys_reg)829 static int mspro_block_set_interface(struct memstick_dev *card,
830 				     unsigned char sys_reg)
831 {
832 	struct memstick_host *host = card->host;
833 	struct mspro_block_data *msb = memstick_get_drvdata(card);
834 	struct mspro_param_register param = {
835 		.system = sys_reg,
836 		.data_count = 0,
837 		.data_address = 0,
838 		.tpc_param = 0
839 	};
840 
841 	card->next_request = h_mspro_block_req_init;
842 	msb->mrq_handler = h_mspro_block_default;
843 	memstick_init_req(&card->current_mrq, MS_TPC_WRITE_REG, &param,
844 			  sizeof(param));
845 	memstick_new_req(host);
846 	wait_for_completion(&card->mrq_complete);
847 	return card->current_mrq.error;
848 }
849 
mspro_block_switch_interface(struct memstick_dev * card)850 static int mspro_block_switch_interface(struct memstick_dev *card)
851 {
852 	struct memstick_host *host = card->host;
853 	struct mspro_block_data *msb = memstick_get_drvdata(card);
854 	int rc = 0;
855 
856 try_again:
857 	if (msb->caps & MEMSTICK_CAP_PAR4)
858 		rc = mspro_block_set_interface(card, MEMSTICK_SYS_PAR4);
859 	else
860 		return 0;
861 
862 	if (rc) {
863 		printk(KERN_WARNING
864 		       "%s: could not switch to 4-bit mode, error %d\n",
865 		       dev_name(&card->dev), rc);
866 		return 0;
867 	}
868 
869 	msb->system = MEMSTICK_SYS_PAR4;
870 	host->set_param(host, MEMSTICK_INTERFACE, MEMSTICK_PAR4);
871 	printk(KERN_INFO "%s: switching to 4-bit parallel mode\n",
872 	       dev_name(&card->dev));
873 
874 	if (msb->caps & MEMSTICK_CAP_PAR8) {
875 		rc = mspro_block_set_interface(card, MEMSTICK_SYS_PAR8);
876 
877 		if (!rc) {
878 			msb->system = MEMSTICK_SYS_PAR8;
879 			host->set_param(host, MEMSTICK_INTERFACE,
880 					MEMSTICK_PAR8);
881 			printk(KERN_INFO
882 			       "%s: switching to 8-bit parallel mode\n",
883 			       dev_name(&card->dev));
884 		} else
885 			printk(KERN_WARNING
886 			       "%s: could not switch to 8-bit mode, error %d\n",
887 			       dev_name(&card->dev), rc);
888 	}
889 
890 	card->next_request = h_mspro_block_req_init;
891 	msb->mrq_handler = h_mspro_block_default;
892 	memstick_init_req(&card->current_mrq, MS_TPC_GET_INT, NULL, 1);
893 	memstick_new_req(card->host);
894 	wait_for_completion(&card->mrq_complete);
895 	rc = card->current_mrq.error;
896 
897 	if (rc) {
898 		printk(KERN_WARNING
899 		       "%s: interface error, trying to fall back to serial\n",
900 		       dev_name(&card->dev));
901 		msb->system = MEMSTICK_SYS_SERIAL;
902 		host->set_param(host, MEMSTICK_POWER, MEMSTICK_POWER_OFF);
903 		msleep(10);
904 		host->set_param(host, MEMSTICK_POWER, MEMSTICK_POWER_ON);
905 		host->set_param(host, MEMSTICK_INTERFACE, MEMSTICK_SERIAL);
906 
907 		rc = memstick_set_rw_addr(card);
908 		if (!rc)
909 			rc = mspro_block_set_interface(card, msb->system);
910 
911 		if (!rc) {
912 			msleep(150);
913 			rc = mspro_block_wait_for_ced(card);
914 			if (rc)
915 				return rc;
916 
917 			if (msb->caps & MEMSTICK_CAP_PAR8) {
918 				msb->caps &= ~MEMSTICK_CAP_PAR8;
919 				goto try_again;
920 			}
921 		}
922 	}
923 	return rc;
924 }
925 
926 /* Memory allocated for attributes by this function should be freed by
927  * mspro_block_data_clear, no matter if the initialization process succeeded
928  * or failed.
929  */
mspro_block_read_attributes(struct memstick_dev * card)930 static int mspro_block_read_attributes(struct memstick_dev *card)
931 {
932 	struct mspro_block_data *msb = memstick_get_drvdata(card);
933 	struct mspro_attribute *attr = NULL;
934 	struct mspro_sys_attr *s_attr = NULL;
935 	unsigned char *buffer = NULL;
936 	int cnt, rc, attr_count;
937 	/* While normally physical device offsets, represented here by
938 	 * attr_offset and attr_len will be of large numeric types, we can be
939 	 * sure, that attributes are close enough to the beginning of the
940 	 * device, to save ourselves some trouble.
941 	 */
942 	unsigned int addr, attr_offset = 0, attr_len = msb->page_size;
943 
944 	attr = kmalloc(msb->page_size, GFP_KERNEL);
945 	if (!attr)
946 		return -ENOMEM;
947 
948 	sg_init_one(&msb->req_sg[0], attr, msb->page_size);
949 	msb->seg_count = 1;
950 	msb->current_seg = 0;
951 	msb->current_page = 0;
952 	msb->data_dir = READ;
953 	msb->transfer_cmd = MSPRO_CMD_READ_ATRB;
954 
955 	msb->setup_transfer(card, attr_offset, attr_len);
956 
957 	memstick_new_req(card->host);
958 	wait_for_completion(&card->mrq_complete);
959 	if (card->current_mrq.error) {
960 		rc = card->current_mrq.error;
961 		goto out_free_attr;
962 	}
963 
964 	if (be16_to_cpu(attr->signature) != MSPRO_BLOCK_SIGNATURE) {
965 		printk(KERN_ERR "%s: unrecognized device signature %x\n",
966 		       dev_name(&card->dev), be16_to_cpu(attr->signature));
967 		rc = -ENODEV;
968 		goto out_free_attr;
969 	}
970 
971 	if (attr->count > MSPRO_BLOCK_MAX_ATTRIBUTES) {
972 		printk(KERN_WARNING "%s: way too many attribute entries\n",
973 		       dev_name(&card->dev));
974 		attr_count = MSPRO_BLOCK_MAX_ATTRIBUTES;
975 	} else
976 		attr_count = attr->count;
977 
978 	msb->attr_group.attrs = kcalloc(attr_count + 1,
979 					sizeof(*msb->attr_group.attrs),
980 					GFP_KERNEL);
981 	if (!msb->attr_group.attrs) {
982 		rc = -ENOMEM;
983 		goto out_free_attr;
984 	}
985 	msb->attr_group.name = "media_attributes";
986 
987 	buffer = kmemdup(attr, attr_len, GFP_KERNEL);
988 	if (!buffer) {
989 		rc = -ENOMEM;
990 		goto out_free_attr;
991 	}
992 
993 	for (cnt = 0; cnt < attr_count; ++cnt) {
994 		s_attr = kzalloc(sizeof(struct mspro_sys_attr), GFP_KERNEL);
995 		if (!s_attr) {
996 			rc = -ENOMEM;
997 			goto out_free_buffer;
998 		}
999 
1000 		msb->attr_group.attrs[cnt] = &s_attr->dev_attr.attr;
1001 		addr = be32_to_cpu(attr->entries[cnt].address);
1002 		s_attr->size = be32_to_cpu(attr->entries[cnt].size);
1003 		dev_dbg(&card->dev, "adding attribute %d: id %x, address %x, "
1004 			"size %zx\n", cnt, attr->entries[cnt].id, addr,
1005 			s_attr->size);
1006 		s_attr->id = attr->entries[cnt].id;
1007 		if (mspro_block_attr_name(s_attr->id))
1008 			snprintf(s_attr->name, sizeof(s_attr->name), "%s",
1009 				 mspro_block_attr_name(attr->entries[cnt].id));
1010 		else
1011 			snprintf(s_attr->name, sizeof(s_attr->name),
1012 				 "attr_x%02x", attr->entries[cnt].id);
1013 
1014 		sysfs_attr_init(&s_attr->dev_attr.attr);
1015 		s_attr->dev_attr.attr.name = s_attr->name;
1016 		s_attr->dev_attr.attr.mode = S_IRUGO;
1017 		s_attr->dev_attr.show = mspro_block_attr_show(s_attr->id);
1018 
1019 		if (!s_attr->size)
1020 			continue;
1021 
1022 		s_attr->data = kmalloc(s_attr->size, GFP_KERNEL);
1023 		if (!s_attr->data) {
1024 			rc = -ENOMEM;
1025 			goto out_free_buffer;
1026 		}
1027 
1028 		if (((addr / msb->page_size) == (attr_offset / msb->page_size))
1029 		    && (((addr + s_attr->size - 1) / msb->page_size)
1030 			== (attr_offset / msb->page_size))) {
1031 			memcpy(s_attr->data, buffer + addr % msb->page_size,
1032 			       s_attr->size);
1033 			continue;
1034 		}
1035 
1036 		attr_offset = (addr / msb->page_size) * msb->page_size;
1037 
1038 		if ((attr_offset + attr_len) < (addr + s_attr->size)) {
1039 			kfree(buffer);
1040 			attr_len = (((addr + s_attr->size) / msb->page_size)
1041 				    + 1 ) * msb->page_size - attr_offset;
1042 			buffer = kmalloc(attr_len, GFP_KERNEL);
1043 			if (!buffer) {
1044 				rc = -ENOMEM;
1045 				goto out_free_attr;
1046 			}
1047 		}
1048 
1049 		sg_init_one(&msb->req_sg[0], buffer, attr_len);
1050 		msb->seg_count = 1;
1051 		msb->current_seg = 0;
1052 		msb->current_page = 0;
1053 		msb->data_dir = READ;
1054 		msb->transfer_cmd = MSPRO_CMD_READ_ATRB;
1055 
1056 		dev_dbg(&card->dev, "reading attribute range %x, %x\n",
1057 			attr_offset, attr_len);
1058 
1059 		msb->setup_transfer(card, attr_offset, attr_len);
1060 		memstick_new_req(card->host);
1061 		wait_for_completion(&card->mrq_complete);
1062 		if (card->current_mrq.error) {
1063 			rc = card->current_mrq.error;
1064 			goto out_free_buffer;
1065 		}
1066 
1067 		memcpy(s_attr->data, buffer + addr % msb->page_size,
1068 		       s_attr->size);
1069 	}
1070 
1071 	rc = 0;
1072 out_free_buffer:
1073 	kfree(buffer);
1074 out_free_attr:
1075 	kfree(attr);
1076 	return rc;
1077 }
1078 
mspro_block_init_card(struct memstick_dev * card)1079 static int mspro_block_init_card(struct memstick_dev *card)
1080 {
1081 	struct mspro_block_data *msb = memstick_get_drvdata(card);
1082 	struct memstick_host *host = card->host;
1083 	int rc = 0;
1084 
1085 	msb->system = MEMSTICK_SYS_SERIAL;
1086 	msb->setup_transfer = h_mspro_block_setup_cmd;
1087 
1088 	card->reg_addr.r_offset = offsetof(struct mspro_register, status);
1089 	card->reg_addr.r_length = sizeof(struct ms_status_register);
1090 	card->reg_addr.w_offset = offsetof(struct mspro_register, param);
1091 	card->reg_addr.w_length = sizeof(struct mspro_param_register);
1092 
1093 	if (memstick_set_rw_addr(card))
1094 		return -EIO;
1095 
1096 	msb->caps = host->caps;
1097 
1098 	msleep(150);
1099 	rc = mspro_block_wait_for_ced(card);
1100 	if (rc)
1101 		return rc;
1102 
1103 	rc = mspro_block_switch_interface(card);
1104 	if (rc)
1105 		return rc;
1106 
1107 	dev_dbg(&card->dev, "card activated\n");
1108 	if (msb->system != MEMSTICK_SYS_SERIAL)
1109 		msb->caps |= MEMSTICK_CAP_AUTO_GET_INT;
1110 
1111 	card->next_request = h_mspro_block_req_init;
1112 	msb->mrq_handler = h_mspro_block_get_ro;
1113 	memstick_init_req(&card->current_mrq, MS_TPC_READ_REG, NULL,
1114 			  sizeof(struct ms_status_register));
1115 	memstick_new_req(card->host);
1116 	wait_for_completion(&card->mrq_complete);
1117 	if (card->current_mrq.error)
1118 		return card->current_mrq.error;
1119 
1120 	dev_dbg(&card->dev, "card r/w status %d\n", msb->read_only ? 0 : 1);
1121 
1122 	msb->page_size = 512;
1123 	rc = mspro_block_read_attributes(card);
1124 	if (rc)
1125 		return rc;
1126 
1127 	dev_dbg(&card->dev, "attributes loaded\n");
1128 	return 0;
1129 
1130 }
1131 
1132 static const struct blk_mq_ops mspro_mq_ops = {
1133 	.queue_rq	= mspro_queue_rq,
1134 };
1135 
mspro_block_init_disk(struct memstick_dev * card)1136 static int mspro_block_init_disk(struct memstick_dev *card)
1137 {
1138 	struct mspro_block_data *msb = memstick_get_drvdata(card);
1139 	struct mspro_devinfo *dev_info = NULL;
1140 	struct mspro_sys_info *sys_info = NULL;
1141 	struct mspro_sys_attr *s_attr = NULL;
1142 	int rc, disk_id;
1143 	unsigned long capacity;
1144 
1145 	for (rc = 0; msb->attr_group.attrs[rc]; ++rc) {
1146 		s_attr = mspro_from_sysfs_attr(msb->attr_group.attrs[rc]);
1147 
1148 		if (s_attr->id == MSPRO_BLOCK_ID_DEVINFO)
1149 			dev_info = s_attr->data;
1150 		else if (s_attr->id == MSPRO_BLOCK_ID_SYSINFO)
1151 			sys_info = s_attr->data;
1152 	}
1153 
1154 	if (!dev_info || !sys_info)
1155 		return -ENODEV;
1156 
1157 	msb->cylinders = be16_to_cpu(dev_info->cylinders);
1158 	msb->heads = be16_to_cpu(dev_info->heads);
1159 	msb->sectors_per_track = be16_to_cpu(dev_info->sectors_per_track);
1160 
1161 	msb->page_size = be16_to_cpu(sys_info->unit_size);
1162 
1163 	mutex_lock(&mspro_block_disk_lock);
1164 	disk_id = idr_alloc(&mspro_block_disk_idr, card, 0, 256, GFP_KERNEL);
1165 	mutex_unlock(&mspro_block_disk_lock);
1166 	if (disk_id < 0)
1167 		return disk_id;
1168 
1169 	rc = blk_mq_alloc_sq_tag_set(&msb->tag_set, &mspro_mq_ops, 2,
1170 				     BLK_MQ_F_SHOULD_MERGE);
1171 	if (rc)
1172 		goto out_release_id;
1173 
1174 	msb->disk = blk_mq_alloc_disk(&msb->tag_set, card);
1175 	if (IS_ERR(msb->disk)) {
1176 		rc = PTR_ERR(msb->disk);
1177 		goto out_free_tag_set;
1178 	}
1179 	msb->queue = msb->disk->queue;
1180 
1181 	blk_queue_max_hw_sectors(msb->queue, MSPRO_BLOCK_MAX_PAGES);
1182 	blk_queue_max_segments(msb->queue, MSPRO_BLOCK_MAX_SEGS);
1183 	blk_queue_max_segment_size(msb->queue,
1184 				   MSPRO_BLOCK_MAX_PAGES * msb->page_size);
1185 
1186 	msb->disk->major = major;
1187 	msb->disk->first_minor = disk_id << MSPRO_BLOCK_PART_SHIFT;
1188 	msb->disk->minors = 1 << MSPRO_BLOCK_PART_SHIFT;
1189 	msb->disk->fops = &ms_block_bdops;
1190 	msb->disk->private_data = msb;
1191 
1192 	sprintf(msb->disk->disk_name, "mspblk%d", disk_id);
1193 
1194 	blk_queue_logical_block_size(msb->queue, msb->page_size);
1195 
1196 	capacity = be16_to_cpu(sys_info->user_block_count);
1197 	capacity *= be16_to_cpu(sys_info->block_size);
1198 	capacity *= msb->page_size >> 9;
1199 	set_capacity(msb->disk, capacity);
1200 	dev_dbg(&card->dev, "capacity set %ld\n", capacity);
1201 
1202 	if (msb->read_only)
1203 		set_disk_ro(msb->disk, true);
1204 
1205 	rc = device_add_disk(&card->dev, msb->disk, NULL);
1206 	if (rc)
1207 		goto out_cleanup_disk;
1208 	msb->active = 1;
1209 	return 0;
1210 
1211 out_cleanup_disk:
1212 	blk_cleanup_disk(msb->disk);
1213 out_free_tag_set:
1214 	blk_mq_free_tag_set(&msb->tag_set);
1215 out_release_id:
1216 	mutex_lock(&mspro_block_disk_lock);
1217 	idr_remove(&mspro_block_disk_idr, disk_id);
1218 	mutex_unlock(&mspro_block_disk_lock);
1219 	return rc;
1220 }
1221 
mspro_block_data_clear(struct mspro_block_data * msb)1222 static void mspro_block_data_clear(struct mspro_block_data *msb)
1223 {
1224 	int cnt;
1225 	struct mspro_sys_attr *s_attr;
1226 
1227 	if (msb->attr_group.attrs) {
1228 		for (cnt = 0; msb->attr_group.attrs[cnt]; ++cnt) {
1229 			s_attr = mspro_from_sysfs_attr(msb->attr_group
1230 							   .attrs[cnt]);
1231 			kfree(s_attr->data);
1232 			kfree(s_attr);
1233 		}
1234 		kfree(msb->attr_group.attrs);
1235 	}
1236 
1237 	msb->card = NULL;
1238 }
1239 
mspro_block_check_card(struct memstick_dev * card)1240 static int mspro_block_check_card(struct memstick_dev *card)
1241 {
1242 	struct mspro_block_data *msb = memstick_get_drvdata(card);
1243 
1244 	return (msb->active == 1);
1245 }
1246 
mspro_block_probe(struct memstick_dev * card)1247 static int mspro_block_probe(struct memstick_dev *card)
1248 {
1249 	struct mspro_block_data *msb;
1250 	int rc = 0;
1251 
1252 	msb = kzalloc(sizeof(struct mspro_block_data), GFP_KERNEL);
1253 	if (!msb)
1254 		return -ENOMEM;
1255 	memstick_set_drvdata(card, msb);
1256 	msb->card = card;
1257 	spin_lock_init(&msb->q_lock);
1258 
1259 	rc = mspro_block_init_card(card);
1260 
1261 	if (rc)
1262 		goto out_free;
1263 
1264 	rc = sysfs_create_group(&card->dev.kobj, &msb->attr_group);
1265 	if (rc)
1266 		goto out_free;
1267 
1268 	rc = mspro_block_init_disk(card);
1269 	if (!rc) {
1270 		card->check = mspro_block_check_card;
1271 		card->stop = mspro_block_stop;
1272 		card->start = mspro_block_start;
1273 		return 0;
1274 	}
1275 
1276 	sysfs_remove_group(&card->dev.kobj, &msb->attr_group);
1277 out_free:
1278 	memstick_set_drvdata(card, NULL);
1279 	mspro_block_data_clear(msb);
1280 	kfree(msb);
1281 	return rc;
1282 }
1283 
mspro_block_remove(struct memstick_dev * card)1284 static void mspro_block_remove(struct memstick_dev *card)
1285 {
1286 	struct mspro_block_data *msb = memstick_get_drvdata(card);
1287 	unsigned long flags;
1288 
1289 	spin_lock_irqsave(&msb->q_lock, flags);
1290 	msb->eject = 1;
1291 	spin_unlock_irqrestore(&msb->q_lock, flags);
1292 	blk_mq_start_hw_queues(msb->queue);
1293 
1294 	del_gendisk(msb->disk);
1295 	dev_dbg(&card->dev, "mspro block remove\n");
1296 
1297 	blk_cleanup_queue(msb->queue);
1298 	blk_mq_free_tag_set(&msb->tag_set);
1299 	msb->queue = NULL;
1300 
1301 	sysfs_remove_group(&card->dev.kobj, &msb->attr_group);
1302 
1303 	mutex_lock(&mspro_block_disk_lock);
1304 	mspro_block_data_clear(msb);
1305 	mutex_unlock(&mspro_block_disk_lock);
1306 
1307 	put_disk(msb->disk);
1308 	memstick_set_drvdata(card, NULL);
1309 }
1310 
1311 #ifdef CONFIG_PM
1312 
mspro_block_suspend(struct memstick_dev * card,pm_message_t state)1313 static int mspro_block_suspend(struct memstick_dev *card, pm_message_t state)
1314 {
1315 	struct mspro_block_data *msb = memstick_get_drvdata(card);
1316 	unsigned long flags;
1317 
1318 	blk_mq_stop_hw_queues(msb->queue);
1319 
1320 	spin_lock_irqsave(&msb->q_lock, flags);
1321 	msb->active = 0;
1322 	spin_unlock_irqrestore(&msb->q_lock, flags);
1323 
1324 	return 0;
1325 }
1326 
mspro_block_resume(struct memstick_dev * card)1327 static int mspro_block_resume(struct memstick_dev *card)
1328 {
1329 	struct mspro_block_data *msb = memstick_get_drvdata(card);
1330 	int rc = 0;
1331 
1332 #ifdef CONFIG_MEMSTICK_UNSAFE_RESUME
1333 
1334 	struct mspro_block_data *new_msb;
1335 	struct memstick_host *host = card->host;
1336 	struct mspro_sys_attr *s_attr, *r_attr;
1337 	unsigned char cnt;
1338 
1339 	mutex_lock(&host->lock);
1340 	new_msb = kzalloc(sizeof(struct mspro_block_data), GFP_KERNEL);
1341 	if (!new_msb) {
1342 		rc = -ENOMEM;
1343 		goto out_unlock;
1344 	}
1345 
1346 	new_msb->card = card;
1347 	memstick_set_drvdata(card, new_msb);
1348 	rc = mspro_block_init_card(card);
1349 	if (rc)
1350 		goto out_free;
1351 
1352 	for (cnt = 0; new_msb->attr_group.attrs[cnt]
1353 		      && msb->attr_group.attrs[cnt]; ++cnt) {
1354 		s_attr = mspro_from_sysfs_attr(new_msb->attr_group.attrs[cnt]);
1355 		r_attr = mspro_from_sysfs_attr(msb->attr_group.attrs[cnt]);
1356 
1357 		if (s_attr->id == MSPRO_BLOCK_ID_SYSINFO
1358 		    && r_attr->id == s_attr->id) {
1359 			if (memcmp(s_attr->data, r_attr->data, s_attr->size))
1360 				break;
1361 
1362 			msb->active = 1;
1363 			break;
1364 		}
1365 	}
1366 
1367 out_free:
1368 	memstick_set_drvdata(card, msb);
1369 	mspro_block_data_clear(new_msb);
1370 	kfree(new_msb);
1371 out_unlock:
1372 	mutex_unlock(&host->lock);
1373 
1374 #endif /* CONFIG_MEMSTICK_UNSAFE_RESUME */
1375 
1376 	blk_mq_start_hw_queues(msb->queue);
1377 	return rc;
1378 }
1379 
1380 #else
1381 
1382 #define mspro_block_suspend NULL
1383 #define mspro_block_resume NULL
1384 
1385 #endif /* CONFIG_PM */
1386 
1387 static struct memstick_device_id mspro_block_id_tbl[] = {
1388 	{MEMSTICK_MATCH_ALL, MEMSTICK_TYPE_PRO, MEMSTICK_CATEGORY_STORAGE_DUO,
1389 	 MEMSTICK_CLASS_DUO},
1390 	{}
1391 };
1392 
1393 
1394 static struct memstick_driver mspro_block_driver = {
1395 	.driver = {
1396 		.name  = DRIVER_NAME,
1397 		.owner = THIS_MODULE
1398 	},
1399 	.id_table = mspro_block_id_tbl,
1400 	.probe    = mspro_block_probe,
1401 	.remove   = mspro_block_remove,
1402 	.suspend  = mspro_block_suspend,
1403 	.resume   = mspro_block_resume
1404 };
1405 
mspro_block_init(void)1406 static int __init mspro_block_init(void)
1407 {
1408 	int rc = -ENOMEM;
1409 
1410 	rc = register_blkdev(major, DRIVER_NAME);
1411 	if (rc < 0) {
1412 		printk(KERN_ERR DRIVER_NAME ": failed to register "
1413 		       "major %d, error %d\n", major, rc);
1414 		return rc;
1415 	}
1416 	if (!major)
1417 		major = rc;
1418 
1419 	rc = memstick_register_driver(&mspro_block_driver);
1420 	if (rc)
1421 		unregister_blkdev(major, DRIVER_NAME);
1422 	return rc;
1423 }
1424 
mspro_block_exit(void)1425 static void __exit mspro_block_exit(void)
1426 {
1427 	memstick_unregister_driver(&mspro_block_driver);
1428 	unregister_blkdev(major, DRIVER_NAME);
1429 	idr_destroy(&mspro_block_disk_idr);
1430 }
1431 
1432 module_init(mspro_block_init);
1433 module_exit(mspro_block_exit);
1434 
1435 MODULE_LICENSE("GPL");
1436 MODULE_AUTHOR("Alex Dubov");
1437 MODULE_DESCRIPTION("Sony MemoryStickPro block device driver");
1438 MODULE_DEVICE_TABLE(memstick, mspro_block_id_tbl);
1439