diff options
| author | Matt Waddel <matt.waddel@linaro.org> | 2011-02-24 16:35:23 +0000 |
|---|---|---|
| committer | Andy Fleming <afleming@freescale.com> | 2011-04-13 06:35:22 -0500 |
| commit | ce0fbcd2e1bd8c7b0975589b9853f3e8914aa406 (patch) | |
| tree | 3e21648aaaee68b050ea9f5f6bafa16a86a82e7a /drivers/mmc | |
| parent | b44c70837a87bcd92b76a94e49b85d7656cb2a11 (diff) | |
MMC: Max blocks value adjustable
The maximum blocks value was hardcoded to 65535 due to a 16 bit
register length. The value can change for different platforms.
This patch makes the default the current value of 65535, but it
is configurable for other platforms.
Signed-off-by: Matt Waddel <matt.waddel@linaro.org>
Signed-off-by: Andy Fleming <afleming@freescale.com>
Diffstat (limited to 'drivers/mmc')
| -rw-r--r-- | drivers/mmc/mmc.c | 19 |
1 files changed, 9 insertions, 10 deletions
diff --git a/drivers/mmc/mmc.c b/drivers/mmc/mmc.c index 9988cb1f24..1355735a52 100644 --- a/drivers/mmc/mmc.c +++ b/drivers/mmc/mmc.c @@ -33,6 +33,11 @@ #include <mmc.h> #include <div64.h> +/* Set block count limit because of 16 bit register limit on some hardware*/ +#ifndef CONFIG_SYS_MMC_MAX_BLK_COUNT +#define CONFIG_SYS_MMC_MAX_BLK_COUNT 65535 +#endif + static struct list_head mmc_devices; static int cur_dev_num = -1; @@ -139,11 +144,8 @@ mmc_bwrite(int dev_num, ulong start, lbaint_t blkcnt, const void*src) return 0; do { - /* - * The 65535 constraint comes from some hardware has - * only 16 bit width block number counter - */ - cur = (blocks_todo > 65535) ? 65535 : blocks_todo; + cur = (blocks_todo > CONFIG_SYS_MMC_MAX_BLK_COUNT) ? + CONFIG_SYS_MMC_MAX_BLK_COUNT : blocks_todo; if(mmc_write_blocks(mmc, start, cur, src) != cur) return 0; blocks_todo -= cur; @@ -215,11 +217,8 @@ static ulong mmc_bread(int dev_num, ulong start, lbaint_t blkcnt, void *dst) return 0; do { - /* - * The 65535 constraint comes from some hardware has - * only 16 bit width block number counter - */ - cur = (blocks_todo > 65535) ? 65535 : blocks_todo; + cur = (blocks_todo > CONFIG_SYS_MMC_MAX_BLK_COUNT) ? + CONFIG_SYS_MMC_MAX_BLK_COUNT : blocks_todo; if(mmc_read_blocks(mmc, dst, start, cur) != cur) return 0; blocks_todo -= cur; |