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mmc: Define a constant for the maximum block size

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The number 512 appears quite a bit in the mmc code. Add a constant for this
so that it can be used here and in other parts of the code (e.g. SPL code
which loads from mmc).

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Vadim Bendebury <vbendeb@google.com>
This commit is contained in:
Simon Glass 2013-04-03 08:54:30 +00:00 committed by Tom Rini
parent 3f9315c04f
commit 8bfa195e4e
2 changed files with 16 additions and 12 deletions
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25
drivers/mmc/mmc.c
View File

@ -601,7 +601,7 @@ static int mmc_send_ext_csd(struct mmc *mmc, u8 *ext_csd)
data.dest = (char *)ext_csd;
data.blocks = 1;
data.blocksize = 512;
data.blocksize = MMC_MAX_BLOCK_LEN;
data.flags = MMC_DATA_READ;
err = mmc_send_cmd(mmc, &cmd, &data);
@ -634,7 +634,7 @@ static int mmc_switch(struct mmc *mmc, u8 set, u8 index, u8 value)
static int mmc_change_freq(struct mmc *mmc)
{
ALLOC_CACHE_ALIGN_BUFFER(u8, ext_csd, 512);
ALLOC_CACHE_ALIGN_BUFFER(u8, ext_csd, MMC_MAX_BLOCK_LEN);
char cardtype;
int err;
@ -899,8 +899,8 @@ static int mmc_startup(struct mmc *mmc)
uint mult, freq;
u64 cmult, csize, capacity;
struct mmc_cmd cmd;
ALLOC_CACHE_ALIGN_BUFFER(u8, ext_csd, 512);
ALLOC_CACHE_ALIGN_BUFFER(u8, test_csd, 512);
ALLOC_CACHE_ALIGN_BUFFER(u8, ext_csd, MMC_MAX_BLOCK_LEN);
ALLOC_CACHE_ALIGN_BUFFER(u8, test_csd, MMC_MAX_BLOCK_LEN);
int timeout = 1000;
#ifdef CONFIG_MMC_SPI_CRC_ON
@ -1016,11 +1016,11 @@ static int mmc_startup(struct mmc *mmc)
mmc->capacity = (csize + 1) << (cmult + 2);
mmc->capacity *= mmc->read_bl_len;
if (mmc->read_bl_len > 512)
mmc->read_bl_len = 512;
if (mmc->read_bl_len > MMC_MAX_BLOCK_LEN)
mmc->read_bl_len = MMC_MAX_BLOCK_LEN;
if (mmc->write_bl_len > 512)
mmc->write_bl_len = 512;
if (mmc->write_bl_len > MMC_MAX_BLOCK_LEN)
mmc->write_bl_len = MMC_MAX_BLOCK_LEN;
/* Select the card, and put it into Transfer Mode */
if (!mmc_host_is_spi(mmc)) { /* cmd not supported in spi */
@ -1051,7 +1051,7 @@ static int mmc_startup(struct mmc *mmc)
| ext_csd[EXT_CSD_SEC_CNT + 1] << 8
| ext_csd[EXT_CSD_SEC_CNT + 2] << 16
| ext_csd[EXT_CSD_SEC_CNT + 3] << 24;
capacity *= 512;
capacity *= MMC_MAX_BLOCK_LEN;
if ((capacity >> 20) > 2 * 1024)
mmc->capacity = capacity;
}
@ -1079,10 +1079,11 @@ static int mmc_startup(struct mmc *mmc)
* group size from ext_csd directly, or calculate
* the group size from the csd value.
*/
if (ext_csd[EXT_CSD_ERASE_GROUP_DEF])
if (ext_csd[EXT_CSD_ERASE_GROUP_DEF]) {
mmc->erase_grp_size =
ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE] * 512 * 1024;
else {
ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE] *
MMC_MAX_BLOCK_LEN * 1024;
} else {
int erase_gsz, erase_gmul;
erase_gsz = (mmc->csd[2] & 0x00007c00) >> 10;
erase_gmul = (mmc->csd[2] & 0x000003e0) >> 5;

3
include/mmc.h
View File

@ -207,6 +207,9 @@
#define PART_ACCESS_MASK (0x7)
#define PART_SUPPORT (0x1)
/* Maximum block size for MMC */
#define MMC_MAX_BLOCK_LEN 512
struct mmc_cid {
unsigned long psn;
unsigned short oid;