Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
Merge of master.kernel.org:/home/rmk/linux-2.6-mmc.git
+4
-1
drivers/mmc/mmc_block.c
+4
-1
drivers/mmc/mmc_block.c
···
383
383
struct mmc_blk_data *md;
384
384
int err;
385
385
386
-
if (card->csd.cmdclass & ~0x1ff)
386
+
/*
387
+
* Check that the card supports the command class(es) we need.
388
+
*/
389
+
if (!(card->csd.cmdclass & CCC_BLOCK_READ))
387
390
return -ENODEV;
388
391
389
392
if (card->csd.read_blkbits < 9) {
+27
include/linux/mmc/protocol.h
+27
include/linux/mmc/protocol.h
···
195
195
#define MMC_VDD_35_36 0x00800000 /* VDD voltage 3.5 ~ 3.6 */
196
196
#define MMC_CARD_BUSY 0x80000000 /* Card Power up status bit */
197
197
198
+
/*
199
+
* Card Command Classes (CCC)
200
+
*/
201
+
#define CCC_BASIC (1<<0) /* (0) Basic protocol functions */
202
+
/* (CMD0,1,2,3,4,7,9,10,12,13,15) */
203
+
#define CCC_STREAM_READ (1<<1) /* (1) Stream read commands */
204
+
/* (CMD11) */
205
+
#define CCC_BLOCK_READ (1<<2) /* (2) Block read commands */
206
+
/* (CMD16,17,18) */
207
+
#define CCC_STREAM_WRITE (1<<3) /* (3) Stream write commands */
208
+
/* (CMD20) */
209
+
#define CCC_BLOCK_WRITE (1<<4) /* (4) Block write commands */
210
+
/* (CMD16,24,25,26,27) */
211
+
#define CCC_ERASE (1<<5) /* (5) Ability to erase blocks */
212
+
/* (CMD32,33,34,35,36,37,38,39) */
213
+
#define CCC_WRITE_PROT (1<<6) /* (6) Able to write protect blocks */
214
+
/* (CMD28,29,30) */
215
+
#define CCC_LOCK_CARD (1<<7) /* (7) Able to lock down card */
216
+
/* (CMD16,CMD42) */
217
+
#define CCC_APP_SPEC (1<<8) /* (8) Application specific */
218
+
/* (CMD55,56,57,ACMD*) */
219
+
#define CCC_IO_MODE (1<<9) /* (9) I/O mode */
220
+
/* (CMD5,39,40,52,53) */
221
+
#define CCC_SWITCH (1<<10) /* (10) High speed switch */
222
+
/* (CMD6,34,35,36,37,50) */
223
+
/* (11) Reserved */
224
+
/* (CMD?) */
198
225
199
226
/*
200
227
* CSD field definitions