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 | |
979ce720 | 5 | * Copyright 2005-2008 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 | |
1dff3144 DW |
47 | #define MMC_NUM_MINORS (256 >> MMC_SHIFT) |
48 | ||
203c8018 | 49 | static DECLARE_BITMAP(dev_use, MMC_NUM_MINORS); |
1da177e4 | 50 | |
1da177e4 LT |
51 | /* |
52 | * There is one mmc_blk_data per slot. | |
53 | */ | |
54 | struct mmc_blk_data { | |
55 | spinlock_t lock; | |
56 | struct gendisk *disk; | |
57 | struct mmc_queue queue; | |
58 | ||
59 | unsigned int usage; | |
60 | unsigned int block_bits; | |
a6f6c96b | 61 | unsigned int read_only; |
1da177e4 LT |
62 | }; |
63 | ||
a621aaed | 64 | static DEFINE_MUTEX(open_lock); |
1da177e4 LT |
65 | |
66 | static struct mmc_blk_data *mmc_blk_get(struct gendisk *disk) | |
67 | { | |
68 | struct mmc_blk_data *md; | |
69 | ||
a621aaed | 70 | mutex_lock(&open_lock); |
1da177e4 LT |
71 | md = disk->private_data; |
72 | if (md && md->usage == 0) | |
73 | md = NULL; | |
74 | if (md) | |
75 | md->usage++; | |
a621aaed | 76 | mutex_unlock(&open_lock); |
1da177e4 LT |
77 | |
78 | return md; | |
79 | } | |
80 | ||
81 | static void mmc_blk_put(struct mmc_blk_data *md) | |
82 | { | |
a621aaed | 83 | mutex_lock(&open_lock); |
1da177e4 LT |
84 | md->usage--; |
85 | if (md->usage == 0) { | |
1dff3144 DW |
86 | int devidx = md->disk->first_minor >> MMC_SHIFT; |
87 | __clear_bit(devidx, dev_use); | |
88 | ||
1da177e4 | 89 | put_disk(md->disk); |
1da177e4 LT |
90 | kfree(md); |
91 | } | |
a621aaed | 92 | mutex_unlock(&open_lock); |
1da177e4 LT |
93 | } |
94 | ||
95 | static int mmc_blk_open(struct inode *inode, struct file *filp) | |
96 | { | |
97 | struct mmc_blk_data *md; | |
98 | int ret = -ENXIO; | |
99 | ||
100 | md = mmc_blk_get(inode->i_bdev->bd_disk); | |
101 | if (md) { | |
102 | if (md->usage == 2) | |
103 | check_disk_change(inode->i_bdev); | |
104 | ret = 0; | |
a00fc090 | 105 | |
70bb0896 AM |
106 | if ((filp->f_mode & FMODE_WRITE) && md->read_only) { |
107 | mmc_blk_put(md); | |
a00fc090 | 108 | ret = -EROFS; |
70bb0896 | 109 | } |
1da177e4 LT |
110 | } |
111 | ||
112 | return ret; | |
113 | } | |
114 | ||
115 | static int mmc_blk_release(struct inode *inode, struct file *filp) | |
116 | { | |
117 | struct mmc_blk_data *md = inode->i_bdev->bd_disk->private_data; | |
118 | ||
119 | mmc_blk_put(md); | |
120 | return 0; | |
121 | } | |
122 | ||
123 | static int | |
a885c8c4 | 124 | mmc_blk_getgeo(struct block_device *bdev, struct hd_geometry *geo) |
1da177e4 | 125 | { |
a885c8c4 CH |
126 | geo->cylinders = get_capacity(bdev->bd_disk) / (4 * 16); |
127 | geo->heads = 4; | |
128 | geo->sectors = 16; | |
129 | return 0; | |
1da177e4 LT |
130 | } |
131 | ||
132 | static struct block_device_operations mmc_bdops = { | |
133 | .open = mmc_blk_open, | |
134 | .release = mmc_blk_release, | |
a885c8c4 | 135 | .getgeo = mmc_blk_getgeo, |
1da177e4 LT |
136 | .owner = THIS_MODULE, |
137 | }; | |
138 | ||
139 | struct mmc_blk_request { | |
140 | struct mmc_request mrq; | |
141 | struct mmc_command cmd; | |
142 | struct mmc_command stop; | |
143 | struct mmc_data data; | |
144 | }; | |
145 | ||
ec5a19dd PO |
146 | static u32 mmc_sd_num_wr_blocks(struct mmc_card *card) |
147 | { | |
148 | int err; | |
149 | u32 blocks; | |
150 | ||
151 | struct mmc_request mrq; | |
152 | struct mmc_command cmd; | |
153 | struct mmc_data data; | |
154 | unsigned int timeout_us; | |
155 | ||
156 | struct scatterlist sg; | |
157 | ||
158 | memset(&cmd, 0, sizeof(struct mmc_command)); | |
159 | ||
160 | cmd.opcode = MMC_APP_CMD; | |
161 | cmd.arg = card->rca << 16; | |
7213d175 | 162 | cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC; |
ec5a19dd PO |
163 | |
164 | err = mmc_wait_for_cmd(card->host, &cmd, 0); | |
7213d175 DB |
165 | if (err) |
166 | return (u32)-1; | |
167 | if (!mmc_host_is_spi(card->host) && !(cmd.resp[0] & R1_APP_CMD)) | |
ec5a19dd PO |
168 | return (u32)-1; |
169 | ||
170 | memset(&cmd, 0, sizeof(struct mmc_command)); | |
171 | ||
172 | cmd.opcode = SD_APP_SEND_NUM_WR_BLKS; | |
173 | cmd.arg = 0; | |
7213d175 | 174 | cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC; |
ec5a19dd PO |
175 | |
176 | memset(&data, 0, sizeof(struct mmc_data)); | |
177 | ||
178 | data.timeout_ns = card->csd.tacc_ns * 100; | |
179 | data.timeout_clks = card->csd.tacc_clks * 100; | |
180 | ||
181 | timeout_us = data.timeout_ns / 1000; | |
182 | timeout_us += data.timeout_clks * 1000 / | |
183 | (card->host->ios.clock / 1000); | |
184 | ||
185 | if (timeout_us > 100000) { | |
186 | data.timeout_ns = 100000000; | |
187 | data.timeout_clks = 0; | |
188 | } | |
189 | ||
190 | data.blksz = 4; | |
191 | data.blocks = 1; | |
192 | data.flags = MMC_DATA_READ; | |
193 | data.sg = &sg; | |
194 | data.sg_len = 1; | |
195 | ||
196 | memset(&mrq, 0, sizeof(struct mmc_request)); | |
197 | ||
198 | mrq.cmd = &cmd; | |
199 | mrq.data = &data; | |
200 | ||
201 | sg_init_one(&sg, &blocks, 4); | |
202 | ||
203 | mmc_wait_for_req(card->host, &mrq); | |
204 | ||
17b0429d | 205 | if (cmd.error || data.error) |
ec5a19dd PO |
206 | return (u32)-1; |
207 | ||
208 | blocks = ntohl(blocks); | |
209 | ||
210 | return blocks; | |
211 | } | |
212 | ||
1da177e4 LT |
213 | static int mmc_blk_issue_rq(struct mmc_queue *mq, struct request *req) |
214 | { | |
215 | struct mmc_blk_data *md = mq->data; | |
216 | struct mmc_card *card = md->queue.card; | |
176f00ff | 217 | struct mmc_blk_request brq; |
f3eb0aaa | 218 | int ret = 1; |
1da177e4 | 219 | |
b855885e | 220 | mmc_claim_host(card->host); |
1da177e4 LT |
221 | |
222 | do { | |
1da177e4 | 223 | struct mmc_command cmd; |
db53f28b | 224 | u32 readcmd, writecmd; |
1da177e4 LT |
225 | |
226 | memset(&brq, 0, sizeof(struct mmc_blk_request)); | |
227 | brq.mrq.cmd = &brq.cmd; | |
228 | brq.mrq.data = &brq.data; | |
229 | ||
fba68bd2 PL |
230 | brq.cmd.arg = req->sector; |
231 | if (!mmc_card_blockaddr(card)) | |
232 | brq.cmd.arg <<= 9; | |
7213d175 | 233 | brq.cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC; |
2c171bf1 | 234 | brq.data.blksz = 1 << md->block_bits; |
1da177e4 LT |
235 | brq.stop.opcode = MMC_STOP_TRANSMISSION; |
236 | brq.stop.arg = 0; | |
7213d175 | 237 | brq.stop.flags = MMC_RSP_SPI_R1B | MMC_RSP_R1B | MMC_CMD_AC; |
55db890a | 238 | brq.data.blocks = req->nr_sectors >> (md->block_bits - 9); |
1da177e4 | 239 | |
788ee7b0 | 240 | if (brq.data.blocks > 1) { |
7213d175 DB |
241 | /* SPI multiblock writes terminate using a special |
242 | * token, not a STOP_TRANSMISSION request. | |
243 | */ | |
244 | if (!mmc_host_is_spi(card->host) | |
245 | || rq_data_dir(req) == READ) | |
246 | brq.mrq.stop = &brq.stop; | |
db53f28b RK |
247 | readcmd = MMC_READ_MULTIPLE_BLOCK; |
248 | writecmd = MMC_WRITE_MULTIPLE_BLOCK; | |
788ee7b0 RK |
249 | } else { |
250 | brq.mrq.stop = NULL; | |
db53f28b RK |
251 | readcmd = MMC_READ_SINGLE_BLOCK; |
252 | writecmd = MMC_WRITE_BLOCK; | |
253 | } | |
254 | ||
255 | if (rq_data_dir(req) == READ) { | |
256 | brq.cmd.opcode = readcmd; | |
257 | brq.data.flags |= MMC_DATA_READ; | |
258 | } else { | |
259 | brq.cmd.opcode = writecmd; | |
260 | brq.data.flags |= MMC_DATA_WRITE; | |
788ee7b0 | 261 | } |
1da177e4 | 262 | |
b146d26a PO |
263 | mmc_set_data_timeout(&brq.data, card); |
264 | ||
1da177e4 | 265 | brq.data.sg = mq->sg; |
98ccf149 PO |
266 | brq.data.sg_len = mmc_queue_map_sg(mq); |
267 | ||
268 | mmc_queue_bounce_pre(mq); | |
1da177e4 LT |
269 | |
270 | mmc_wait_for_req(card->host, &brq.mrq); | |
98ccf149 PO |
271 | |
272 | mmc_queue_bounce_post(mq); | |
273 | ||
979ce720 PO |
274 | /* |
275 | * Check for errors here, but don't jump to cmd_err | |
276 | * until later as we need to wait for the card to leave | |
277 | * programming mode even when things go wrong. | |
278 | */ | |
1da177e4 LT |
279 | if (brq.cmd.error) { |
280 | printk(KERN_ERR "%s: error %d sending read/write command\n", | |
281 | req->rq_disk->disk_name, brq.cmd.error); | |
1da177e4 LT |
282 | } |
283 | ||
284 | if (brq.data.error) { | |
285 | printk(KERN_ERR "%s: error %d transferring data\n", | |
286 | req->rq_disk->disk_name, brq.data.error); | |
1da177e4 LT |
287 | } |
288 | ||
289 | if (brq.stop.error) { | |
290 | printk(KERN_ERR "%s: error %d sending stop command\n", | |
291 | req->rq_disk->disk_name, brq.stop.error); | |
1da177e4 LT |
292 | } |
293 | ||
7213d175 | 294 | if (!mmc_host_is_spi(card->host) && rq_data_dir(req) != READ) { |
2ed6d22c RK |
295 | do { |
296 | int err; | |
297 | ||
298 | cmd.opcode = MMC_SEND_STATUS; | |
299 | cmd.arg = card->rca << 16; | |
300 | cmd.flags = MMC_RSP_R1 | MMC_CMD_AC; | |
301 | err = mmc_wait_for_cmd(card->host, &cmd, 5); | |
302 | if (err) { | |
303 | printk(KERN_ERR "%s: error %d requesting status\n", | |
304 | req->rq_disk->disk_name, err); | |
305 | goto cmd_err; | |
306 | } | |
d198f101 PO |
307 | /* |
308 | * Some cards mishandle the status bits, | |
309 | * so make sure to check both the busy | |
310 | * indication and the card state. | |
311 | */ | |
312 | } while (!(cmd.resp[0] & R1_READY_FOR_DATA) || | |
313 | (R1_CURRENT_STATE(cmd.resp[0]) == 7)); | |
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 | 323 | |
979ce720 PO |
324 | if (brq.cmd.error || brq.data.error || brq.stop.error) |
325 | goto cmd_err; | |
326 | ||
1da177e4 LT |
327 | /* |
328 | * A block was successfully transferred. | |
329 | */ | |
330 | spin_lock_irq(&md->lock); | |
fd539832 | 331 | ret = __blk_end_request(req, 0, brq.data.bytes_xfered); |
1da177e4 LT |
332 | spin_unlock_irq(&md->lock); |
333 | } while (ret); | |
334 | ||
b855885e | 335 | mmc_release_host(card->host); |
1da177e4 LT |
336 | |
337 | return 1; | |
338 | ||
339 | cmd_err: | |
ec5a19dd PO |
340 | /* |
341 | * If this is an SD card and we're writing, we can first | |
342 | * mark the known good sectors as ok. | |
343 | * | |
344 | * If the card is not SD, we can still ok written sectors | |
23af6039 PO |
345 | * as reported by the controller (which might be less than |
346 | * the real number of written sectors, but never more). | |
176f00ff PO |
347 | * |
348 | * For reads we just fail the entire chunk as that should | |
349 | * be safe in all cases. | |
1da177e4 | 350 | */ |
23af6039 PO |
351 | if (rq_data_dir(req) != READ) { |
352 | if (mmc_card_sd(card)) { | |
353 | u32 blocks; | |
354 | unsigned int bytes; | |
355 | ||
356 | blocks = mmc_sd_num_wr_blocks(card); | |
357 | if (blocks != (u32)-1) { | |
358 | if (card->csd.write_partial) | |
359 | bytes = blocks << md->block_bits; | |
360 | else | |
361 | bytes = blocks << 9; | |
362 | spin_lock_irq(&md->lock); | |
363 | ret = __blk_end_request(req, 0, bytes); | |
364 | spin_unlock_irq(&md->lock); | |
365 | } | |
366 | } else { | |
ec5a19dd | 367 | spin_lock_irq(&md->lock); |
23af6039 | 368 | ret = __blk_end_request(req, 0, brq.data.bytes_xfered); |
ec5a19dd PO |
369 | spin_unlock_irq(&md->lock); |
370 | } | |
176f00ff PO |
371 | } |
372 | ||
b855885e | 373 | mmc_release_host(card->host); |
ec5a19dd | 374 | |
1da177e4 | 375 | spin_lock_irq(&md->lock); |
fd539832 KU |
376 | while (ret) |
377 | ret = __blk_end_request(req, -EIO, blk_rq_cur_bytes(req)); | |
1da177e4 LT |
378 | spin_unlock_irq(&md->lock); |
379 | ||
380 | return 0; | |
381 | } | |
382 | ||
1da177e4 | 383 | |
a6f6c96b RK |
384 | static inline int mmc_blk_readonly(struct mmc_card *card) |
385 | { | |
386 | return mmc_card_readonly(card) || | |
387 | !(card->csd.cmdclass & CCC_BLOCK_WRITE); | |
388 | } | |
389 | ||
1da177e4 LT |
390 | static struct mmc_blk_data *mmc_blk_alloc(struct mmc_card *card) |
391 | { | |
392 | struct mmc_blk_data *md; | |
393 | int devidx, ret; | |
394 | ||
395 | devidx = find_first_zero_bit(dev_use, MMC_NUM_MINORS); | |
396 | if (devidx >= MMC_NUM_MINORS) | |
397 | return ERR_PTR(-ENOSPC); | |
398 | __set_bit(devidx, dev_use); | |
399 | ||
dd00cc48 | 400 | md = kzalloc(sizeof(struct mmc_blk_data), GFP_KERNEL); |
a6f6c96b RK |
401 | if (!md) { |
402 | ret = -ENOMEM; | |
403 | goto out; | |
404 | } | |
1da177e4 | 405 | |
1da177e4 | 406 | |
a6f6c96b RK |
407 | /* |
408 | * Set the read-only status based on the supported commands | |
409 | * and the write protect switch. | |
410 | */ | |
411 | md->read_only = mmc_blk_readonly(card); | |
1da177e4 | 412 | |
a6f6c96b | 413 | /* |
6fe9febb PO |
414 | * Both SD and MMC specifications state (although a bit |
415 | * unclearly in the MMC case) that a block size of 512 | |
416 | * bytes must always be supported by the card. | |
a6f6c96b | 417 | */ |
6fe9febb | 418 | md->block_bits = 9; |
1da177e4 | 419 | |
a6f6c96b RK |
420 | md->disk = alloc_disk(1 << MMC_SHIFT); |
421 | if (md->disk == NULL) { | |
422 | ret = -ENOMEM; | |
423 | goto err_kfree; | |
424 | } | |
1da177e4 | 425 | |
a6f6c96b RK |
426 | spin_lock_init(&md->lock); |
427 | md->usage = 1; | |
1da177e4 | 428 | |
a6f6c96b RK |
429 | ret = mmc_init_queue(&md->queue, card, &md->lock); |
430 | if (ret) | |
431 | goto err_putdisk; | |
1da177e4 | 432 | |
a6f6c96b RK |
433 | md->queue.issue_fn = mmc_blk_issue_rq; |
434 | md->queue.data = md; | |
d2b18394 | 435 | |
fe6b4c88 | 436 | md->disk->major = MMC_BLOCK_MAJOR; |
a6f6c96b RK |
437 | md->disk->first_minor = devidx << MMC_SHIFT; |
438 | md->disk->fops = &mmc_bdops; | |
439 | md->disk->private_data = md; | |
440 | md->disk->queue = md->queue.queue; | |
441 | md->disk->driverfs_dev = &card->dev; | |
442 | ||
443 | /* | |
444 | * As discussed on lkml, GENHD_FL_REMOVABLE should: | |
445 | * | |
446 | * - be set for removable media with permanent block devices | |
447 | * - be unset for removable block devices with permanent media | |
448 | * | |
449 | * Since MMC block devices clearly fall under the second | |
450 | * case, we do not set GENHD_FL_REMOVABLE. Userspace | |
451 | * should use the block device creation/destruction hotplug | |
452 | * messages to tell when the card is present. | |
453 | */ | |
454 | ||
455 | sprintf(md->disk->disk_name, "mmcblk%d", devidx); | |
a6f6c96b RK |
456 | |
457 | blk_queue_hardsect_size(md->queue.queue, 1 << md->block_bits); | |
458 | ||
85a18ad9 PO |
459 | if (!mmc_card_sd(card) && mmc_card_blockaddr(card)) { |
460 | /* | |
461 | * The EXT_CSD sector count is in number or 512 byte | |
462 | * sectors. | |
463 | */ | |
464 | set_capacity(md->disk, card->ext_csd.sectors); | |
465 | } else { | |
466 | /* | |
467 | * The CSD capacity field is in units of read_blkbits. | |
468 | * set_capacity takes units of 512 bytes. | |
469 | */ | |
470 | set_capacity(md->disk, | |
471 | card->csd.capacity << (card->csd.read_blkbits - 9)); | |
472 | } | |
1da177e4 | 473 | return md; |
a6f6c96b RK |
474 | |
475 | err_putdisk: | |
476 | put_disk(md->disk); | |
477 | err_kfree: | |
478 | kfree(md); | |
479 | out: | |
480 | return ERR_PTR(ret); | |
1da177e4 LT |
481 | } |
482 | ||
483 | static int | |
484 | mmc_blk_set_blksize(struct mmc_blk_data *md, struct mmc_card *card) | |
485 | { | |
486 | struct mmc_command cmd; | |
487 | int err; | |
488 | ||
fba68bd2 PL |
489 | /* Block-addressed cards ignore MMC_SET_BLOCKLEN. */ |
490 | if (mmc_card_blockaddr(card)) | |
491 | return 0; | |
492 | ||
b855885e | 493 | mmc_claim_host(card->host); |
1da177e4 | 494 | cmd.opcode = MMC_SET_BLOCKLEN; |
d2b18394 | 495 | cmd.arg = 1 << md->block_bits; |
7213d175 | 496 | cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC; |
1da177e4 | 497 | err = mmc_wait_for_cmd(card->host, &cmd, 5); |
b855885e | 498 | mmc_release_host(card->host); |
1da177e4 LT |
499 | |
500 | if (err) { | |
501 | printk(KERN_ERR "%s: unable to set block size to %d: %d\n", | |
502 | md->disk->disk_name, cmd.arg, err); | |
503 | return -EINVAL; | |
504 | } | |
505 | ||
506 | return 0; | |
507 | } | |
508 | ||
509 | static int mmc_blk_probe(struct mmc_card *card) | |
510 | { | |
511 | struct mmc_blk_data *md; | |
512 | int err; | |
513 | ||
912490db PO |
514 | /* |
515 | * Check that the card supports the command class(es) we need. | |
516 | */ | |
517 | if (!(card->csd.cmdclass & CCC_BLOCK_READ)) | |
1da177e4 LT |
518 | return -ENODEV; |
519 | ||
1da177e4 LT |
520 | md = mmc_blk_alloc(card); |
521 | if (IS_ERR(md)) | |
522 | return PTR_ERR(md); | |
523 | ||
524 | err = mmc_blk_set_blksize(md, card); | |
525 | if (err) | |
526 | goto out; | |
527 | ||
51828abc | 528 | printk(KERN_INFO "%s: %s %s %lluKiB %s\n", |
1da177e4 | 529 | md->disk->disk_name, mmc_card_id(card), mmc_card_name(card), |
51828abc AM |
530 | (unsigned long long)(get_capacity(md->disk) >> 1), |
531 | md->read_only ? "(ro)" : ""); | |
1da177e4 LT |
532 | |
533 | mmc_set_drvdata(card, md); | |
534 | add_disk(md->disk); | |
535 | return 0; | |
536 | ||
537 | out: | |
538 | mmc_blk_put(md); | |
539 | ||
540 | return err; | |
541 | } | |
542 | ||
543 | static void mmc_blk_remove(struct mmc_card *card) | |
544 | { | |
545 | struct mmc_blk_data *md = mmc_get_drvdata(card); | |
546 | ||
547 | if (md) { | |
89b4e133 | 548 | /* Stop new requests from getting into the queue */ |
1da177e4 LT |
549 | del_gendisk(md->disk); |
550 | ||
89b4e133 PO |
551 | /* Then flush out any already in there */ |
552 | mmc_cleanup_queue(&md->queue); | |
1da177e4 | 553 | |
1da177e4 LT |
554 | mmc_blk_put(md); |
555 | } | |
556 | mmc_set_drvdata(card, NULL); | |
557 | } | |
558 | ||
559 | #ifdef CONFIG_PM | |
560 | static int mmc_blk_suspend(struct mmc_card *card, pm_message_t state) | |
561 | { | |
562 | struct mmc_blk_data *md = mmc_get_drvdata(card); | |
563 | ||
564 | if (md) { | |
565 | mmc_queue_suspend(&md->queue); | |
566 | } | |
567 | return 0; | |
568 | } | |
569 | ||
570 | static int mmc_blk_resume(struct mmc_card *card) | |
571 | { | |
572 | struct mmc_blk_data *md = mmc_get_drvdata(card); | |
573 | ||
574 | if (md) { | |
575 | mmc_blk_set_blksize(md, card); | |
576 | mmc_queue_resume(&md->queue); | |
577 | } | |
578 | return 0; | |
579 | } | |
580 | #else | |
581 | #define mmc_blk_suspend NULL | |
582 | #define mmc_blk_resume NULL | |
583 | #endif | |
584 | ||
585 | static struct mmc_driver mmc_driver = { | |
586 | .drv = { | |
587 | .name = "mmcblk", | |
588 | }, | |
589 | .probe = mmc_blk_probe, | |
590 | .remove = mmc_blk_remove, | |
591 | .suspend = mmc_blk_suspend, | |
592 | .resume = mmc_blk_resume, | |
593 | }; | |
594 | ||
595 | static int __init mmc_blk_init(void) | |
596 | { | |
9d4e98e9 | 597 | int res; |
1da177e4 | 598 | |
fe6b4c88 PO |
599 | res = register_blkdev(MMC_BLOCK_MAJOR, "mmc"); |
600 | if (res) | |
1da177e4 | 601 | goto out; |
1da177e4 | 602 | |
9d4e98e9 AM |
603 | res = mmc_register_driver(&mmc_driver); |
604 | if (res) | |
605 | goto out2; | |
1da177e4 | 606 | |
9d4e98e9 AM |
607 | return 0; |
608 | out2: | |
609 | unregister_blkdev(MMC_BLOCK_MAJOR, "mmc"); | |
1da177e4 LT |
610 | out: |
611 | return res; | |
612 | } | |
613 | ||
614 | static void __exit mmc_blk_exit(void) | |
615 | { | |
616 | mmc_unregister_driver(&mmc_driver); | |
fe6b4c88 | 617 | unregister_blkdev(MMC_BLOCK_MAJOR, "mmc"); |
1da177e4 LT |
618 | } |
619 | ||
620 | module_init(mmc_blk_init); | |
621 | module_exit(mmc_blk_exit); | |
622 | ||
623 | MODULE_LICENSE("GPL"); | |
624 | MODULE_DESCRIPTION("Multimedia Card (MMC) block device driver"); | |
625 |