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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * Block driver for media (i.e., flash cards) | |
3 | * | |
4 | * Copyright 2002 Hewlett-Packard Company | |
98ac2162 | 5 | * Copyright 2005-2007 Pierre Ossman |
1da177e4 LT |
6 | * |
7 | * Use consistent with the GNU GPL is permitted, | |
8 | * provided that this copyright notice is | |
9 | * preserved in its entirety in all copies and derived works. | |
10 | * | |
11 | * HEWLETT-PACKARD COMPANY MAKES NO WARRANTIES, EXPRESSED OR IMPLIED, | |
12 | * AS TO THE USEFULNESS OR CORRECTNESS OF THIS CODE OR ITS | |
13 | * FITNESS FOR ANY PARTICULAR PURPOSE. | |
14 | * | |
15 | * Many thanks to Alessandro Rubini and Jonathan Corbet! | |
16 | * | |
17 | * Author: Andrew Christian | |
18 | * 28 May 2002 | |
19 | */ | |
20 | #include <linux/moduleparam.h> | |
21 | #include <linux/module.h> | |
22 | #include <linux/init.h> | |
23 | ||
1da177e4 LT |
24 | #include <linux/kernel.h> |
25 | #include <linux/fs.h> | |
26 | #include <linux/errno.h> | |
27 | #include <linux/hdreg.h> | |
28 | #include <linux/kdev_t.h> | |
29 | #include <linux/blkdev.h> | |
a621aaed | 30 | #include <linux/mutex.h> |
ec5a19dd | 31 | #include <linux/scatterlist.h> |
1da177e4 LT |
32 | |
33 | #include <linux/mmc/card.h> | |
385e3227 | 34 | #include <linux/mmc/host.h> |
da7fbe58 PO |
35 | #include <linux/mmc/mmc.h> |
36 | #include <linux/mmc/sd.h> | |
1da177e4 LT |
37 | |
38 | #include <asm/system.h> | |
39 | #include <asm/uaccess.h> | |
40 | ||
98ac2162 | 41 | #include "queue.h" |
1da177e4 LT |
42 | |
43 | /* | |
44 | * max 8 partitions per card | |
45 | */ | |
46 | #define MMC_SHIFT 3 | |
47 | ||
1da177e4 LT |
48 | /* |
49 | * There is one mmc_blk_data per slot. | |
50 | */ | |
51 | struct mmc_blk_data { | |
52 | spinlock_t lock; | |
53 | struct gendisk *disk; | |
54 | struct mmc_queue queue; | |
55 | ||
56 | unsigned int usage; | |
57 | unsigned int block_bits; | |
a6f6c96b | 58 | unsigned int read_only; |
1da177e4 LT |
59 | }; |
60 | ||
a621aaed | 61 | static DEFINE_MUTEX(open_lock); |
1da177e4 LT |
62 | |
63 | static struct mmc_blk_data *mmc_blk_get(struct gendisk *disk) | |
64 | { | |
65 | struct mmc_blk_data *md; | |
66 | ||
a621aaed | 67 | mutex_lock(&open_lock); |
1da177e4 LT |
68 | md = disk->private_data; |
69 | if (md && md->usage == 0) | |
70 | md = NULL; | |
71 | if (md) | |
72 | md->usage++; | |
a621aaed | 73 | mutex_unlock(&open_lock); |
1da177e4 LT |
74 | |
75 | return md; | |
76 | } | |
77 | ||
78 | static void mmc_blk_put(struct mmc_blk_data *md) | |
79 | { | |
a621aaed | 80 | mutex_lock(&open_lock); |
1da177e4 LT |
81 | md->usage--; |
82 | if (md->usage == 0) { | |
83 | put_disk(md->disk); | |
1da177e4 LT |
84 | kfree(md); |
85 | } | |
a621aaed | 86 | mutex_unlock(&open_lock); |
1da177e4 LT |
87 | } |
88 | ||
89 | static int mmc_blk_open(struct inode *inode, struct file *filp) | |
90 | { | |
91 | struct mmc_blk_data *md; | |
92 | int ret = -ENXIO; | |
93 | ||
94 | md = mmc_blk_get(inode->i_bdev->bd_disk); | |
95 | if (md) { | |
96 | if (md->usage == 2) | |
97 | check_disk_change(inode->i_bdev); | |
98 | ret = 0; | |
a00fc090 | 99 | |
a6f6c96b | 100 | if ((filp->f_mode & FMODE_WRITE) && md->read_only) |
a00fc090 | 101 | ret = -EROFS; |
1da177e4 LT |
102 | } |
103 | ||
104 | return ret; | |
105 | } | |
106 | ||
107 | static int mmc_blk_release(struct inode *inode, struct file *filp) | |
108 | { | |
109 | struct mmc_blk_data *md = inode->i_bdev->bd_disk->private_data; | |
110 | ||
111 | mmc_blk_put(md); | |
112 | return 0; | |
113 | } | |
114 | ||
115 | static int | |
a885c8c4 | 116 | mmc_blk_getgeo(struct block_device *bdev, struct hd_geometry *geo) |
1da177e4 | 117 | { |
a885c8c4 CH |
118 | geo->cylinders = get_capacity(bdev->bd_disk) / (4 * 16); |
119 | geo->heads = 4; | |
120 | geo->sectors = 16; | |
121 | return 0; | |
1da177e4 LT |
122 | } |
123 | ||
124 | static struct block_device_operations mmc_bdops = { | |
125 | .open = mmc_blk_open, | |
126 | .release = mmc_blk_release, | |
a885c8c4 | 127 | .getgeo = mmc_blk_getgeo, |
1da177e4 LT |
128 | .owner = THIS_MODULE, |
129 | }; | |
130 | ||
131 | struct mmc_blk_request { | |
132 | struct mmc_request mrq; | |
133 | struct mmc_command cmd; | |
134 | struct mmc_command stop; | |
135 | struct mmc_data data; | |
136 | }; | |
137 | ||
ec5a19dd PO |
138 | static u32 mmc_sd_num_wr_blocks(struct mmc_card *card) |
139 | { | |
140 | int err; | |
141 | u32 blocks; | |
142 | ||
143 | struct mmc_request mrq; | |
144 | struct mmc_command cmd; | |
145 | struct mmc_data data; | |
146 | unsigned int timeout_us; | |
147 | ||
148 | struct scatterlist sg; | |
149 | ||
150 | memset(&cmd, 0, sizeof(struct mmc_command)); | |
151 | ||
152 | cmd.opcode = MMC_APP_CMD; | |
153 | cmd.arg = card->rca << 16; | |
154 | cmd.flags = MMC_RSP_R1 | MMC_CMD_AC; | |
155 | ||
156 | err = mmc_wait_for_cmd(card->host, &cmd, 0); | |
157 | if ((err != MMC_ERR_NONE) || !(cmd.resp[0] & R1_APP_CMD)) | |
158 | return (u32)-1; | |
159 | ||
160 | memset(&cmd, 0, sizeof(struct mmc_command)); | |
161 | ||
162 | cmd.opcode = SD_APP_SEND_NUM_WR_BLKS; | |
163 | cmd.arg = 0; | |
164 | cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC; | |
165 | ||
166 | memset(&data, 0, sizeof(struct mmc_data)); | |
167 | ||
168 | data.timeout_ns = card->csd.tacc_ns * 100; | |
169 | data.timeout_clks = card->csd.tacc_clks * 100; | |
170 | ||
171 | timeout_us = data.timeout_ns / 1000; | |
172 | timeout_us += data.timeout_clks * 1000 / | |
173 | (card->host->ios.clock / 1000); | |
174 | ||
175 | if (timeout_us > 100000) { | |
176 | data.timeout_ns = 100000000; | |
177 | data.timeout_clks = 0; | |
178 | } | |
179 | ||
180 | data.blksz = 4; | |
181 | data.blocks = 1; | |
182 | data.flags = MMC_DATA_READ; | |
183 | data.sg = &sg; | |
184 | data.sg_len = 1; | |
185 | ||
186 | memset(&mrq, 0, sizeof(struct mmc_request)); | |
187 | ||
188 | mrq.cmd = &cmd; | |
189 | mrq.data = &data; | |
190 | ||
191 | sg_init_one(&sg, &blocks, 4); | |
192 | ||
193 | mmc_wait_for_req(card->host, &mrq); | |
194 | ||
195 | if (cmd.error != MMC_ERR_NONE || data.error != MMC_ERR_NONE) | |
196 | return (u32)-1; | |
197 | ||
198 | blocks = ntohl(blocks); | |
199 | ||
200 | return blocks; | |
201 | } | |
202 | ||
1da177e4 LT |
203 | static int mmc_blk_issue_rq(struct mmc_queue *mq, struct request *req) |
204 | { | |
205 | struct mmc_blk_data *md = mq->data; | |
206 | struct mmc_card *card = md->queue.card; | |
176f00ff | 207 | struct mmc_blk_request brq; |
14d836e7 | 208 | int ret = 1, sg_pos, data_size; |
1da177e4 | 209 | |
b855885e | 210 | mmc_claim_host(card->host); |
1da177e4 LT |
211 | |
212 | do { | |
1da177e4 | 213 | struct mmc_command cmd; |
db53f28b | 214 | u32 readcmd, writecmd; |
1da177e4 LT |
215 | |
216 | memset(&brq, 0, sizeof(struct mmc_blk_request)); | |
217 | brq.mrq.cmd = &brq.cmd; | |
218 | brq.mrq.data = &brq.data; | |
219 | ||
fba68bd2 PL |
220 | brq.cmd.arg = req->sector; |
221 | if (!mmc_card_blockaddr(card)) | |
222 | brq.cmd.arg <<= 9; | |
e9225176 | 223 | brq.cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC; |
2c171bf1 | 224 | brq.data.blksz = 1 << md->block_bits; |
1da177e4 LT |
225 | brq.stop.opcode = MMC_STOP_TRANSMISSION; |
226 | brq.stop.arg = 0; | |
e9225176 | 227 | brq.stop.flags = MMC_RSP_R1B | MMC_CMD_AC; |
55db890a PO |
228 | brq.data.blocks = req->nr_sectors >> (md->block_bits - 9); |
229 | if (brq.data.blocks > card->host->max_blk_count) | |
230 | brq.data.blocks = card->host->max_blk_count; | |
1da177e4 | 231 | |
d773d725 | 232 | mmc_set_data_timeout(&brq.data, card, rq_data_dir(req) != READ); |
385e3227 | 233 | |
db53f28b RK |
234 | /* |
235 | * If the host doesn't support multiple block writes, force | |
ec5a19dd PO |
236 | * block writes to single block. SD cards are excepted from |
237 | * this rule as they support querying the number of | |
238 | * successfully written sectors. | |
db53f28b RK |
239 | */ |
240 | if (rq_data_dir(req) != READ && | |
ec5a19dd PO |
241 | !(card->host->caps & MMC_CAP_MULTIWRITE) && |
242 | !mmc_card_sd(card)) | |
1da177e4 | 243 | brq.data.blocks = 1; |
788ee7b0 RK |
244 | |
245 | if (brq.data.blocks > 1) { | |
246 | brq.data.flags |= MMC_DATA_MULTI; | |
247 | brq.mrq.stop = &brq.stop; | |
db53f28b RK |
248 | readcmd = MMC_READ_MULTIPLE_BLOCK; |
249 | writecmd = MMC_WRITE_MULTIPLE_BLOCK; | |
788ee7b0 RK |
250 | } else { |
251 | brq.mrq.stop = NULL; | |
db53f28b RK |
252 | readcmd = MMC_READ_SINGLE_BLOCK; |
253 | writecmd = MMC_WRITE_BLOCK; | |
254 | } | |
255 | ||
256 | if (rq_data_dir(req) == READ) { | |
257 | brq.cmd.opcode = readcmd; | |
258 | brq.data.flags |= MMC_DATA_READ; | |
259 | } else { | |
260 | brq.cmd.opcode = writecmd; | |
261 | brq.data.flags |= MMC_DATA_WRITE; | |
788ee7b0 | 262 | } |
1da177e4 LT |
263 | |
264 | brq.data.sg = mq->sg; | |
265 | brq.data.sg_len = blk_rq_map_sg(req->q, req, brq.data.sg); | |
266 | ||
14d836e7 AD |
267 | if (brq.data.blocks != |
268 | (req->nr_sectors >> (md->block_bits - 9))) { | |
269 | data_size = brq.data.blocks * brq.data.blksz; | |
270 | for (sg_pos = 0; sg_pos < brq.data.sg_len; sg_pos++) { | |
271 | data_size -= mq->sg[sg_pos].length; | |
272 | if (data_size <= 0) { | |
273 | mq->sg[sg_pos].length += data_size; | |
274 | sg_pos++; | |
275 | break; | |
276 | } | |
277 | } | |
278 | brq.data.sg_len = sg_pos; | |
279 | } | |
280 | ||
1da177e4 LT |
281 | mmc_wait_for_req(card->host, &brq.mrq); |
282 | if (brq.cmd.error) { | |
283 | printk(KERN_ERR "%s: error %d sending read/write command\n", | |
284 | req->rq_disk->disk_name, brq.cmd.error); | |
285 | goto cmd_err; | |
286 | } | |
287 | ||
288 | if (brq.data.error) { | |
289 | printk(KERN_ERR "%s: error %d transferring data\n", | |
290 | req->rq_disk->disk_name, brq.data.error); | |
291 | goto cmd_err; | |
292 | } | |
293 | ||
294 | if (brq.stop.error) { | |
295 | printk(KERN_ERR "%s: error %d sending stop command\n", | |
296 | req->rq_disk->disk_name, brq.stop.error); | |
297 | goto cmd_err; | |
298 | } | |
299 | ||
2ed6d22c RK |
300 | if (rq_data_dir(req) != READ) { |
301 | do { | |
302 | int err; | |
303 | ||
304 | cmd.opcode = MMC_SEND_STATUS; | |
305 | cmd.arg = card->rca << 16; | |
306 | cmd.flags = MMC_RSP_R1 | MMC_CMD_AC; | |
307 | err = mmc_wait_for_cmd(card->host, &cmd, 5); | |
308 | if (err) { | |
309 | printk(KERN_ERR "%s: error %d requesting status\n", | |
310 | req->rq_disk->disk_name, err); | |
311 | goto cmd_err; | |
312 | } | |
313 | } while (!(cmd.resp[0] & R1_READY_FOR_DATA)); | |
1da177e4 LT |
314 | |
315 | #if 0 | |
2ed6d22c RK |
316 | if (cmd.resp[0] & ~0x00000900) |
317 | printk(KERN_ERR "%s: status = %08x\n", | |
318 | req->rq_disk->disk_name, cmd.resp[0]); | |
319 | if (mmc_decode_status(cmd.resp)) | |
320 | goto cmd_err; | |
1da177e4 | 321 | #endif |
2ed6d22c | 322 | } |
1da177e4 LT |
323 | |
324 | /* | |
325 | * A block was successfully transferred. | |
326 | */ | |
327 | spin_lock_irq(&md->lock); | |
328 | ret = end_that_request_chunk(req, 1, brq.data.bytes_xfered); | |
329 | if (!ret) { | |
330 | /* | |
331 | * The whole request completed successfully. | |
332 | */ | |
333 | add_disk_randomness(req->rq_disk); | |
334 | blkdev_dequeue_request(req); | |
8ffdc655 | 335 | end_that_request_last(req, 1); |
1da177e4 LT |
336 | } |
337 | spin_unlock_irq(&md->lock); | |
338 | } while (ret); | |
339 | ||
b855885e | 340 | mmc_release_host(card->host); |
1da177e4 LT |
341 | |
342 | return 1; | |
343 | ||
344 | cmd_err: | |
ec5a19dd PO |
345 | /* |
346 | * If this is an SD card and we're writing, we can first | |
347 | * mark the known good sectors as ok. | |
348 | * | |
349 | * If the card is not SD, we can still ok written sectors | |
350 | * if the controller can do proper error reporting. | |
176f00ff PO |
351 | * |
352 | * For reads we just fail the entire chunk as that should | |
353 | * be safe in all cases. | |
1da177e4 | 354 | */ |
ec5a19dd PO |
355 | if (rq_data_dir(req) != READ && mmc_card_sd(card)) { |
356 | u32 blocks; | |
357 | unsigned int bytes; | |
358 | ||
359 | blocks = mmc_sd_num_wr_blocks(card); | |
360 | if (blocks != (u32)-1) { | |
361 | if (card->csd.write_partial) | |
362 | bytes = blocks << md->block_bits; | |
363 | else | |
364 | bytes = blocks << 9; | |
365 | spin_lock_irq(&md->lock); | |
366 | ret = end_that_request_chunk(req, 1, bytes); | |
367 | spin_unlock_irq(&md->lock); | |
368 | } | |
369 | } else if (rq_data_dir(req) != READ && | |
370 | (card->host->caps & MMC_CAP_MULTIWRITE)) { | |
176f00ff PO |
371 | spin_lock_irq(&md->lock); |
372 | ret = end_that_request_chunk(req, 1, brq.data.bytes_xfered); | |
373 | spin_unlock_irq(&md->lock); | |
374 | } | |
375 | ||
b855885e | 376 | mmc_release_host(card->host); |
ec5a19dd | 377 | |
1da177e4 | 378 | spin_lock_irq(&md->lock); |
176f00ff | 379 | while (ret) { |
1da177e4 LT |
380 | ret = end_that_request_chunk(req, 0, |
381 | req->current_nr_sectors << 9); | |
176f00ff | 382 | } |
1da177e4 LT |
383 | |
384 | add_disk_randomness(req->rq_disk); | |
385 | blkdev_dequeue_request(req); | |
8ffdc655 | 386 | end_that_request_last(req, 0); |
1da177e4 LT |
387 | spin_unlock_irq(&md->lock); |
388 | ||
389 | return 0; | |
390 | } | |
391 | ||
392 | #define MMC_NUM_MINORS (256 >> MMC_SHIFT) | |
393 | ||
394 | static unsigned long dev_use[MMC_NUM_MINORS/(8*sizeof(unsigned long))]; | |
395 | ||
a6f6c96b RK |
396 | static inline int mmc_blk_readonly(struct mmc_card *card) |
397 | { | |
398 | return mmc_card_readonly(card) || | |
399 | !(card->csd.cmdclass & CCC_BLOCK_WRITE); | |
400 | } | |
401 | ||
1da177e4 LT |
402 | static struct mmc_blk_data *mmc_blk_alloc(struct mmc_card *card) |
403 | { | |
404 | struct mmc_blk_data *md; | |
405 | int devidx, ret; | |
406 | ||
407 | devidx = find_first_zero_bit(dev_use, MMC_NUM_MINORS); | |
408 | if (devidx >= MMC_NUM_MINORS) | |
409 | return ERR_PTR(-ENOSPC); | |
410 | __set_bit(devidx, dev_use); | |
411 | ||
412 | md = kmalloc(sizeof(struct mmc_blk_data), GFP_KERNEL); | |
a6f6c96b RK |
413 | if (!md) { |
414 | ret = -ENOMEM; | |
415 | goto out; | |
416 | } | |
1da177e4 | 417 | |
a6f6c96b | 418 | memset(md, 0, sizeof(struct mmc_blk_data)); |
1da177e4 | 419 | |
a6f6c96b RK |
420 | /* |
421 | * Set the read-only status based on the supported commands | |
422 | * and the write protect switch. | |
423 | */ | |
424 | md->read_only = mmc_blk_readonly(card); | |
1da177e4 | 425 | |
a6f6c96b | 426 | /* |
6fe9febb PO |
427 | * Both SD and MMC specifications state (although a bit |
428 | * unclearly in the MMC case) that a block size of 512 | |
429 | * bytes must always be supported by the card. | |
a6f6c96b | 430 | */ |
6fe9febb | 431 | md->block_bits = 9; |
1da177e4 | 432 | |
a6f6c96b RK |
433 | md->disk = alloc_disk(1 << MMC_SHIFT); |
434 | if (md->disk == NULL) { | |
435 | ret = -ENOMEM; | |
436 | goto err_kfree; | |
437 | } | |
1da177e4 | 438 | |
a6f6c96b RK |
439 | spin_lock_init(&md->lock); |
440 | md->usage = 1; | |
1da177e4 | 441 | |
a6f6c96b RK |
442 | ret = mmc_init_queue(&md->queue, card, &md->lock); |
443 | if (ret) | |
444 | goto err_putdisk; | |
1da177e4 | 445 | |
a6f6c96b RK |
446 | md->queue.issue_fn = mmc_blk_issue_rq; |
447 | md->queue.data = md; | |
d2b18394 | 448 | |
fe6b4c88 | 449 | md->disk->major = MMC_BLOCK_MAJOR; |
a6f6c96b RK |
450 | md->disk->first_minor = devidx << MMC_SHIFT; |
451 | md->disk->fops = &mmc_bdops; | |
452 | md->disk->private_data = md; | |
453 | md->disk->queue = md->queue.queue; | |
454 | md->disk->driverfs_dev = &card->dev; | |
455 | ||
456 | /* | |
457 | * As discussed on lkml, GENHD_FL_REMOVABLE should: | |
458 | * | |
459 | * - be set for removable media with permanent block devices | |
460 | * - be unset for removable block devices with permanent media | |
461 | * | |
462 | * Since MMC block devices clearly fall under the second | |
463 | * case, we do not set GENHD_FL_REMOVABLE. Userspace | |
464 | * should use the block device creation/destruction hotplug | |
465 | * messages to tell when the card is present. | |
466 | */ | |
467 | ||
468 | sprintf(md->disk->disk_name, "mmcblk%d", devidx); | |
a6f6c96b RK |
469 | |
470 | blk_queue_hardsect_size(md->queue.queue, 1 << md->block_bits); | |
471 | ||
85a18ad9 PO |
472 | if (!mmc_card_sd(card) && mmc_card_blockaddr(card)) { |
473 | /* | |
474 | * The EXT_CSD sector count is in number or 512 byte | |
475 | * sectors. | |
476 | */ | |
477 | set_capacity(md->disk, card->ext_csd.sectors); | |
478 | } else { | |
479 | /* | |
480 | * The CSD capacity field is in units of read_blkbits. | |
481 | * set_capacity takes units of 512 bytes. | |
482 | */ | |
483 | set_capacity(md->disk, | |
484 | card->csd.capacity << (card->csd.read_blkbits - 9)); | |
485 | } | |
1da177e4 | 486 | return md; |
a6f6c96b RK |
487 | |
488 | err_putdisk: | |
489 | put_disk(md->disk); | |
490 | err_kfree: | |
491 | kfree(md); | |
492 | out: | |
493 | return ERR_PTR(ret); | |
1da177e4 LT |
494 | } |
495 | ||
496 | static int | |
497 | mmc_blk_set_blksize(struct mmc_blk_data *md, struct mmc_card *card) | |
498 | { | |
499 | struct mmc_command cmd; | |
500 | int err; | |
501 | ||
fba68bd2 PL |
502 | /* Block-addressed cards ignore MMC_SET_BLOCKLEN. */ |
503 | if (mmc_card_blockaddr(card)) | |
504 | return 0; | |
505 | ||
b855885e | 506 | mmc_claim_host(card->host); |
1da177e4 | 507 | cmd.opcode = MMC_SET_BLOCKLEN; |
d2b18394 | 508 | cmd.arg = 1 << md->block_bits; |
e9225176 | 509 | cmd.flags = MMC_RSP_R1 | MMC_CMD_AC; |
1da177e4 | 510 | err = mmc_wait_for_cmd(card->host, &cmd, 5); |
b855885e | 511 | mmc_release_host(card->host); |
1da177e4 LT |
512 | |
513 | if (err) { | |
514 | printk(KERN_ERR "%s: unable to set block size to %d: %d\n", | |
515 | md->disk->disk_name, cmd.arg, err); | |
516 | return -EINVAL; | |
517 | } | |
518 | ||
519 | return 0; | |
520 | } | |
521 | ||
522 | static int mmc_blk_probe(struct mmc_card *card) | |
523 | { | |
524 | struct mmc_blk_data *md; | |
525 | int err; | |
526 | ||
912490db PO |
527 | /* |
528 | * Check that the card supports the command class(es) we need. | |
529 | */ | |
530 | if (!(card->csd.cmdclass & CCC_BLOCK_READ)) | |
1da177e4 LT |
531 | return -ENODEV; |
532 | ||
1da177e4 LT |
533 | md = mmc_blk_alloc(card); |
534 | if (IS_ERR(md)) | |
535 | return PTR_ERR(md); | |
536 | ||
537 | err = mmc_blk_set_blksize(md, card); | |
538 | if (err) | |
539 | goto out; | |
540 | ||
51828abc | 541 | printk(KERN_INFO "%s: %s %s %lluKiB %s\n", |
1da177e4 | 542 | md->disk->disk_name, mmc_card_id(card), mmc_card_name(card), |
51828abc AM |
543 | (unsigned long long)(get_capacity(md->disk) >> 1), |
544 | md->read_only ? "(ro)" : ""); | |
1da177e4 LT |
545 | |
546 | mmc_set_drvdata(card, md); | |
547 | add_disk(md->disk); | |
548 | return 0; | |
549 | ||
550 | out: | |
551 | mmc_blk_put(md); | |
552 | ||
553 | return err; | |
554 | } | |
555 | ||
556 | static void mmc_blk_remove(struct mmc_card *card) | |
557 | { | |
558 | struct mmc_blk_data *md = mmc_get_drvdata(card); | |
559 | ||
560 | if (md) { | |
561 | int devidx; | |
562 | ||
89b4e133 | 563 | /* Stop new requests from getting into the queue */ |
1da177e4 LT |
564 | del_gendisk(md->disk); |
565 | ||
89b4e133 PO |
566 | /* Then flush out any already in there */ |
567 | mmc_cleanup_queue(&md->queue); | |
1da177e4 LT |
568 | |
569 | devidx = md->disk->first_minor >> MMC_SHIFT; | |
570 | __clear_bit(devidx, dev_use); | |
571 | ||
572 | mmc_blk_put(md); | |
573 | } | |
574 | mmc_set_drvdata(card, NULL); | |
575 | } | |
576 | ||
577 | #ifdef CONFIG_PM | |
578 | static int mmc_blk_suspend(struct mmc_card *card, pm_message_t state) | |
579 | { | |
580 | struct mmc_blk_data *md = mmc_get_drvdata(card); | |
581 | ||
582 | if (md) { | |
583 | mmc_queue_suspend(&md->queue); | |
584 | } | |
585 | return 0; | |
586 | } | |
587 | ||
588 | static int mmc_blk_resume(struct mmc_card *card) | |
589 | { | |
590 | struct mmc_blk_data *md = mmc_get_drvdata(card); | |
591 | ||
592 | if (md) { | |
593 | mmc_blk_set_blksize(md, card); | |
594 | mmc_queue_resume(&md->queue); | |
595 | } | |
596 | return 0; | |
597 | } | |
598 | #else | |
599 | #define mmc_blk_suspend NULL | |
600 | #define mmc_blk_resume NULL | |
601 | #endif | |
602 | ||
603 | static struct mmc_driver mmc_driver = { | |
604 | .drv = { | |
605 | .name = "mmcblk", | |
606 | }, | |
607 | .probe = mmc_blk_probe, | |
608 | .remove = mmc_blk_remove, | |
609 | .suspend = mmc_blk_suspend, | |
610 | .resume = mmc_blk_resume, | |
611 | }; | |
612 | ||
613 | static int __init mmc_blk_init(void) | |
614 | { | |
615 | int res = -ENOMEM; | |
616 | ||
fe6b4c88 PO |
617 | res = register_blkdev(MMC_BLOCK_MAJOR, "mmc"); |
618 | if (res) | |
1da177e4 | 619 | goto out; |
1da177e4 | 620 | |
1da177e4 LT |
621 | return mmc_register_driver(&mmc_driver); |
622 | ||
623 | out: | |
624 | return res; | |
625 | } | |
626 | ||
627 | static void __exit mmc_blk_exit(void) | |
628 | { | |
629 | mmc_unregister_driver(&mmc_driver); | |
fe6b4c88 | 630 | unregister_blkdev(MMC_BLOCK_MAJOR, "mmc"); |
1da177e4 LT |
631 | } |
632 | ||
633 | module_init(mmc_blk_init); | |
634 | module_exit(mmc_blk_exit); | |
635 | ||
636 | MODULE_LICENSE("GPL"); | |
637 | MODULE_DESCRIPTION("Multimedia Card (MMC) block device driver"); | |
638 |