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; | |
98ccf149 PO |
265 | brq.data.sg_len = mmc_queue_map_sg(mq); |
266 | ||
267 | mmc_queue_bounce_pre(mq); | |
1da177e4 | 268 | |
14d836e7 AD |
269 | if (brq.data.blocks != |
270 | (req->nr_sectors >> (md->block_bits - 9))) { | |
271 | data_size = brq.data.blocks * brq.data.blksz; | |
272 | for (sg_pos = 0; sg_pos < brq.data.sg_len; sg_pos++) { | |
273 | data_size -= mq->sg[sg_pos].length; | |
274 | if (data_size <= 0) { | |
275 | mq->sg[sg_pos].length += data_size; | |
276 | sg_pos++; | |
277 | break; | |
278 | } | |
279 | } | |
280 | brq.data.sg_len = sg_pos; | |
281 | } | |
282 | ||
1da177e4 | 283 | mmc_wait_for_req(card->host, &brq.mrq); |
98ccf149 PO |
284 | |
285 | mmc_queue_bounce_post(mq); | |
286 | ||
1da177e4 LT |
287 | if (brq.cmd.error) { |
288 | printk(KERN_ERR "%s: error %d sending read/write command\n", | |
289 | req->rq_disk->disk_name, brq.cmd.error); | |
290 | goto cmd_err; | |
291 | } | |
292 | ||
293 | if (brq.data.error) { | |
294 | printk(KERN_ERR "%s: error %d transferring data\n", | |
295 | req->rq_disk->disk_name, brq.data.error); | |
296 | goto cmd_err; | |
297 | } | |
298 | ||
299 | if (brq.stop.error) { | |
300 | printk(KERN_ERR "%s: error %d sending stop command\n", | |
301 | req->rq_disk->disk_name, brq.stop.error); | |
302 | goto cmd_err; | |
303 | } | |
304 | ||
2ed6d22c RK |
305 | if (rq_data_dir(req) != READ) { |
306 | do { | |
307 | int err; | |
308 | ||
309 | cmd.opcode = MMC_SEND_STATUS; | |
310 | cmd.arg = card->rca << 16; | |
311 | cmd.flags = MMC_RSP_R1 | MMC_CMD_AC; | |
312 | err = mmc_wait_for_cmd(card->host, &cmd, 5); | |
313 | if (err) { | |
314 | printk(KERN_ERR "%s: error %d requesting status\n", | |
315 | req->rq_disk->disk_name, err); | |
316 | goto cmd_err; | |
317 | } | |
318 | } while (!(cmd.resp[0] & R1_READY_FOR_DATA)); | |
1da177e4 LT |
319 | |
320 | #if 0 | |
2ed6d22c RK |
321 | if (cmd.resp[0] & ~0x00000900) |
322 | printk(KERN_ERR "%s: status = %08x\n", | |
323 | req->rq_disk->disk_name, cmd.resp[0]); | |
324 | if (mmc_decode_status(cmd.resp)) | |
325 | goto cmd_err; | |
1da177e4 | 326 | #endif |
2ed6d22c | 327 | } |
1da177e4 LT |
328 | |
329 | /* | |
330 | * A block was successfully transferred. | |
331 | */ | |
332 | spin_lock_irq(&md->lock); | |
333 | ret = end_that_request_chunk(req, 1, brq.data.bytes_xfered); | |
334 | if (!ret) { | |
335 | /* | |
336 | * The whole request completed successfully. | |
337 | */ | |
338 | add_disk_randomness(req->rq_disk); | |
339 | blkdev_dequeue_request(req); | |
8ffdc655 | 340 | end_that_request_last(req, 1); |
1da177e4 LT |
341 | } |
342 | spin_unlock_irq(&md->lock); | |
343 | } while (ret); | |
344 | ||
b855885e | 345 | mmc_release_host(card->host); |
1da177e4 LT |
346 | |
347 | return 1; | |
348 | ||
349 | cmd_err: | |
ec5a19dd PO |
350 | /* |
351 | * If this is an SD card and we're writing, we can first | |
352 | * mark the known good sectors as ok. | |
353 | * | |
354 | * If the card is not SD, we can still ok written sectors | |
355 | * if the controller can do proper error reporting. | |
176f00ff PO |
356 | * |
357 | * For reads we just fail the entire chunk as that should | |
358 | * be safe in all cases. | |
1da177e4 | 359 | */ |
ec5a19dd PO |
360 | if (rq_data_dir(req) != READ && mmc_card_sd(card)) { |
361 | u32 blocks; | |
362 | unsigned int bytes; | |
363 | ||
364 | blocks = mmc_sd_num_wr_blocks(card); | |
365 | if (blocks != (u32)-1) { | |
366 | if (card->csd.write_partial) | |
367 | bytes = blocks << md->block_bits; | |
368 | else | |
369 | bytes = blocks << 9; | |
370 | spin_lock_irq(&md->lock); | |
371 | ret = end_that_request_chunk(req, 1, bytes); | |
372 | spin_unlock_irq(&md->lock); | |
373 | } | |
374 | } else if (rq_data_dir(req) != READ && | |
375 | (card->host->caps & MMC_CAP_MULTIWRITE)) { | |
176f00ff PO |
376 | spin_lock_irq(&md->lock); |
377 | ret = end_that_request_chunk(req, 1, brq.data.bytes_xfered); | |
378 | spin_unlock_irq(&md->lock); | |
379 | } | |
380 | ||
b855885e | 381 | mmc_release_host(card->host); |
ec5a19dd | 382 | |
1da177e4 | 383 | spin_lock_irq(&md->lock); |
176f00ff | 384 | while (ret) { |
1da177e4 LT |
385 | ret = end_that_request_chunk(req, 0, |
386 | req->current_nr_sectors << 9); | |
176f00ff | 387 | } |
1da177e4 LT |
388 | |
389 | add_disk_randomness(req->rq_disk); | |
390 | blkdev_dequeue_request(req); | |
8ffdc655 | 391 | end_that_request_last(req, 0); |
1da177e4 LT |
392 | spin_unlock_irq(&md->lock); |
393 | ||
394 | return 0; | |
395 | } | |
396 | ||
397 | #define MMC_NUM_MINORS (256 >> MMC_SHIFT) | |
398 | ||
399 | static unsigned long dev_use[MMC_NUM_MINORS/(8*sizeof(unsigned long))]; | |
400 | ||
a6f6c96b RK |
401 | static inline int mmc_blk_readonly(struct mmc_card *card) |
402 | { | |
403 | return mmc_card_readonly(card) || | |
404 | !(card->csd.cmdclass & CCC_BLOCK_WRITE); | |
405 | } | |
406 | ||
1da177e4 LT |
407 | static struct mmc_blk_data *mmc_blk_alloc(struct mmc_card *card) |
408 | { | |
409 | struct mmc_blk_data *md; | |
410 | int devidx, ret; | |
411 | ||
412 | devidx = find_first_zero_bit(dev_use, MMC_NUM_MINORS); | |
413 | if (devidx >= MMC_NUM_MINORS) | |
414 | return ERR_PTR(-ENOSPC); | |
415 | __set_bit(devidx, dev_use); | |
416 | ||
417 | md = kmalloc(sizeof(struct mmc_blk_data), GFP_KERNEL); | |
a6f6c96b RK |
418 | if (!md) { |
419 | ret = -ENOMEM; | |
420 | goto out; | |
421 | } | |
1da177e4 | 422 | |
a6f6c96b | 423 | memset(md, 0, sizeof(struct mmc_blk_data)); |
1da177e4 | 424 | |
a6f6c96b RK |
425 | /* |
426 | * Set the read-only status based on the supported commands | |
427 | * and the write protect switch. | |
428 | */ | |
429 | md->read_only = mmc_blk_readonly(card); | |
1da177e4 | 430 | |
a6f6c96b | 431 | /* |
6fe9febb PO |
432 | * Both SD and MMC specifications state (although a bit |
433 | * unclearly in the MMC case) that a block size of 512 | |
434 | * bytes must always be supported by the card. | |
a6f6c96b | 435 | */ |
6fe9febb | 436 | md->block_bits = 9; |
1da177e4 | 437 | |
a6f6c96b RK |
438 | md->disk = alloc_disk(1 << MMC_SHIFT); |
439 | if (md->disk == NULL) { | |
440 | ret = -ENOMEM; | |
441 | goto err_kfree; | |
442 | } | |
1da177e4 | 443 | |
a6f6c96b RK |
444 | spin_lock_init(&md->lock); |
445 | md->usage = 1; | |
1da177e4 | 446 | |
a6f6c96b RK |
447 | ret = mmc_init_queue(&md->queue, card, &md->lock); |
448 | if (ret) | |
449 | goto err_putdisk; | |
1da177e4 | 450 | |
a6f6c96b RK |
451 | md->queue.issue_fn = mmc_blk_issue_rq; |
452 | md->queue.data = md; | |
d2b18394 | 453 | |
fe6b4c88 | 454 | md->disk->major = MMC_BLOCK_MAJOR; |
a6f6c96b RK |
455 | md->disk->first_minor = devidx << MMC_SHIFT; |
456 | md->disk->fops = &mmc_bdops; | |
457 | md->disk->private_data = md; | |
458 | md->disk->queue = md->queue.queue; | |
459 | md->disk->driverfs_dev = &card->dev; | |
460 | ||
461 | /* | |
462 | * As discussed on lkml, GENHD_FL_REMOVABLE should: | |
463 | * | |
464 | * - be set for removable media with permanent block devices | |
465 | * - be unset for removable block devices with permanent media | |
466 | * | |
467 | * Since MMC block devices clearly fall under the second | |
468 | * case, we do not set GENHD_FL_REMOVABLE. Userspace | |
469 | * should use the block device creation/destruction hotplug | |
470 | * messages to tell when the card is present. | |
471 | */ | |
472 | ||
473 | sprintf(md->disk->disk_name, "mmcblk%d", devidx); | |
a6f6c96b RK |
474 | |
475 | blk_queue_hardsect_size(md->queue.queue, 1 << md->block_bits); | |
476 | ||
85a18ad9 PO |
477 | if (!mmc_card_sd(card) && mmc_card_blockaddr(card)) { |
478 | /* | |
479 | * The EXT_CSD sector count is in number or 512 byte | |
480 | * sectors. | |
481 | */ | |
482 | set_capacity(md->disk, card->ext_csd.sectors); | |
483 | } else { | |
484 | /* | |
485 | * The CSD capacity field is in units of read_blkbits. | |
486 | * set_capacity takes units of 512 bytes. | |
487 | */ | |
488 | set_capacity(md->disk, | |
489 | card->csd.capacity << (card->csd.read_blkbits - 9)); | |
490 | } | |
1da177e4 | 491 | return md; |
a6f6c96b RK |
492 | |
493 | err_putdisk: | |
494 | put_disk(md->disk); | |
495 | err_kfree: | |
496 | kfree(md); | |
497 | out: | |
498 | return ERR_PTR(ret); | |
1da177e4 LT |
499 | } |
500 | ||
501 | static int | |
502 | mmc_blk_set_blksize(struct mmc_blk_data *md, struct mmc_card *card) | |
503 | { | |
504 | struct mmc_command cmd; | |
505 | int err; | |
506 | ||
fba68bd2 PL |
507 | /* Block-addressed cards ignore MMC_SET_BLOCKLEN. */ |
508 | if (mmc_card_blockaddr(card)) | |
509 | return 0; | |
510 | ||
b855885e | 511 | mmc_claim_host(card->host); |
1da177e4 | 512 | cmd.opcode = MMC_SET_BLOCKLEN; |
d2b18394 | 513 | cmd.arg = 1 << md->block_bits; |
e9225176 | 514 | cmd.flags = MMC_RSP_R1 | MMC_CMD_AC; |
1da177e4 | 515 | err = mmc_wait_for_cmd(card->host, &cmd, 5); |
b855885e | 516 | mmc_release_host(card->host); |
1da177e4 LT |
517 | |
518 | if (err) { | |
519 | printk(KERN_ERR "%s: unable to set block size to %d: %d\n", | |
520 | md->disk->disk_name, cmd.arg, err); | |
521 | return -EINVAL; | |
522 | } | |
523 | ||
524 | return 0; | |
525 | } | |
526 | ||
527 | static int mmc_blk_probe(struct mmc_card *card) | |
528 | { | |
529 | struct mmc_blk_data *md; | |
530 | int err; | |
531 | ||
912490db PO |
532 | /* |
533 | * Check that the card supports the command class(es) we need. | |
534 | */ | |
535 | if (!(card->csd.cmdclass & CCC_BLOCK_READ)) | |
1da177e4 LT |
536 | return -ENODEV; |
537 | ||
1da177e4 LT |
538 | md = mmc_blk_alloc(card); |
539 | if (IS_ERR(md)) | |
540 | return PTR_ERR(md); | |
541 | ||
542 | err = mmc_blk_set_blksize(md, card); | |
543 | if (err) | |
544 | goto out; | |
545 | ||
51828abc | 546 | printk(KERN_INFO "%s: %s %s %lluKiB %s\n", |
1da177e4 | 547 | md->disk->disk_name, mmc_card_id(card), mmc_card_name(card), |
51828abc AM |
548 | (unsigned long long)(get_capacity(md->disk) >> 1), |
549 | md->read_only ? "(ro)" : ""); | |
1da177e4 LT |
550 | |
551 | mmc_set_drvdata(card, md); | |
552 | add_disk(md->disk); | |
553 | return 0; | |
554 | ||
555 | out: | |
556 | mmc_blk_put(md); | |
557 | ||
558 | return err; | |
559 | } | |
560 | ||
561 | static void mmc_blk_remove(struct mmc_card *card) | |
562 | { | |
563 | struct mmc_blk_data *md = mmc_get_drvdata(card); | |
564 | ||
565 | if (md) { | |
566 | int devidx; | |
567 | ||
89b4e133 | 568 | /* Stop new requests from getting into the queue */ |
1da177e4 LT |
569 | del_gendisk(md->disk); |
570 | ||
89b4e133 PO |
571 | /* Then flush out any already in there */ |
572 | mmc_cleanup_queue(&md->queue); | |
1da177e4 LT |
573 | |
574 | devidx = md->disk->first_minor >> MMC_SHIFT; | |
575 | __clear_bit(devidx, dev_use); | |
576 | ||
577 | mmc_blk_put(md); | |
578 | } | |
579 | mmc_set_drvdata(card, NULL); | |
580 | } | |
581 | ||
582 | #ifdef CONFIG_PM | |
583 | static int mmc_blk_suspend(struct mmc_card *card, pm_message_t state) | |
584 | { | |
585 | struct mmc_blk_data *md = mmc_get_drvdata(card); | |
586 | ||
587 | if (md) { | |
588 | mmc_queue_suspend(&md->queue); | |
589 | } | |
590 | return 0; | |
591 | } | |
592 | ||
593 | static int mmc_blk_resume(struct mmc_card *card) | |
594 | { | |
595 | struct mmc_blk_data *md = mmc_get_drvdata(card); | |
596 | ||
597 | if (md) { | |
598 | mmc_blk_set_blksize(md, card); | |
599 | mmc_queue_resume(&md->queue); | |
600 | } | |
601 | return 0; | |
602 | } | |
603 | #else | |
604 | #define mmc_blk_suspend NULL | |
605 | #define mmc_blk_resume NULL | |
606 | #endif | |
607 | ||
608 | static struct mmc_driver mmc_driver = { | |
609 | .drv = { | |
610 | .name = "mmcblk", | |
611 | }, | |
612 | .probe = mmc_blk_probe, | |
613 | .remove = mmc_blk_remove, | |
614 | .suspend = mmc_blk_suspend, | |
615 | .resume = mmc_blk_resume, | |
616 | }; | |
617 | ||
618 | static int __init mmc_blk_init(void) | |
619 | { | |
620 | int res = -ENOMEM; | |
621 | ||
fe6b4c88 PO |
622 | res = register_blkdev(MMC_BLOCK_MAJOR, "mmc"); |
623 | if (res) | |
1da177e4 | 624 | goto out; |
1da177e4 | 625 | |
1da177e4 LT |
626 | return mmc_register_driver(&mmc_driver); |
627 | ||
628 | out: | |
629 | return res; | |
630 | } | |
631 | ||
632 | static void __exit mmc_blk_exit(void) | |
633 | { | |
634 | mmc_unregister_driver(&mmc_driver); | |
fe6b4c88 | 635 | unregister_blkdev(MMC_BLOCK_MAJOR, "mmc"); |
1da177e4 LT |
636 | } |
637 | ||
638 | module_init(mmc_blk_init); | |
639 | module_exit(mmc_blk_exit); | |
640 | ||
641 | MODULE_LICENSE("GPL"); | |
642 | MODULE_DESCRIPTION("Multimedia Card (MMC) block device driver"); | |
643 |