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mmc: provide a select_hwpart implementation for get_device()

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This enables specifying which eMMC HW partition to target for any U-Boot
command that uses the generic get_partition() function to parse its
command-line arguments.

Acked-by: Pantelis Antoniou <panto@antoniou-consulting.com>
Signed-off-by: Stephen Warren <swarren@nvidia.com>
This commit is contained in:
Stephen Warren 2014-05-07 12:19:02 -06:00 committed by Pantelis Antoniou
parent 336b6f9048
commit d235628434
3 changed files with 33 additions and 1 deletions
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6
disk/part.c
View File

@ -39,7 +39,11 @@ static const struct block_drvr block_drvr[] = {
{ .name = "usb", .get_dev = usb_stor_get_dev, },
#endif
#if defined(CONFIG_MMC)
{ .name = "mmc", .get_dev = mmc_get_dev, },
{
.name = "mmc",
.get_dev = mmc_get_dev,
.select_hwpart = mmc_select_hwpart,
},
#endif
#if defined(CONFIG_SYSTEMACE)
{ .name = "ace", .get_dev = systemace_get_dev, },

26
drivers/mmc/mmc.c
View File

@ -552,6 +552,32 @@ static int mmc_set_capacity(struct mmc *mmc, int part_num)
return 0;
}
int mmc_select_hwpart(int dev_num, int hwpart)
{
struct mmc *mmc = find_mmc_device(dev_num);
int ret;
if (!mmc)
return -1;
if (mmc->part_num == hwpart)
return 0;
if (mmc->part_config == MMCPART_NOAVAILABLE) {
printf("Card doesn't support part_switch\n");
return -1;
}
ret = mmc_switch_part(dev_num, hwpart);
if (ret)
return -1;
mmc->part_num = hwpart;
return 0;
}
int mmc_switch_part(int dev_num, unsigned int part_num)
{
struct mmc *mmc = find_mmc_device(dev_num);

2
include/part.h
View File

@ -103,6 +103,7 @@ block_dev_desc_t* sata_get_dev(int dev);
block_dev_desc_t* scsi_get_dev(int dev);
block_dev_desc_t* usb_stor_get_dev(int dev);
block_dev_desc_t* mmc_get_dev(int dev);
int mmc_select_hwpart(int dev_num, int hwpart);
block_dev_desc_t* systemace_get_dev(int dev);
block_dev_desc_t* mg_disk_get_dev(int dev);
block_dev_desc_t *host_get_dev(int dev);
@ -126,6 +127,7 @@ static inline block_dev_desc_t* sata_get_dev(int dev) { return NULL; }
static inline block_dev_desc_t* scsi_get_dev(int dev) { return NULL; }
static inline block_dev_desc_t* usb_stor_get_dev(int dev) { return NULL; }
static inline block_dev_desc_t* mmc_get_dev(int dev) { return NULL; }
static inline int mmc_select_hwpart(int dev_num, int hwpart) { return -1; }
static inline block_dev_desc_t* systemace_get_dev(int dev) { return NULL; }
static inline block_dev_desc_t* mg_disk_get_dev(int dev) { return NULL; }
static inline block_dev_desc_t *host_get_dev(int dev) { return NULL; }