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| author | Lei Wen <leiwen@marvell.com> | 2011-05-02 16:26:26 +0000 |
|---|---|---|
| committer | Andy Fleming <afleming@freescale.com> | 2011-05-18 14:37:03 -0500 |
| commit | bc897b1d4d86597311430dbe7b3e6c807c8c53e5 (patch) | |
| tree | dc5136100f1b0a873dd8bc90708286215335f559 /common/cmd_mmc.c | |
| parent | ea6ebe21772568ee97fb5c23c01e993140f0e0e6 (diff) | |
| download | u-boot-midas-bc897b1d4d86597311430dbe7b3e6c807c8c53e5.tar.gz u-boot-midas-bc897b1d4d86597311430dbe7b3e6c807c8c53e5.tar.bz2 u-boot-midas-bc897b1d4d86597311430dbe7b3e6c807c8c53e5.zip | |
mmc: enable partition switch function for emmc
For emmc, it may have up to 7 partitions: two boot partitions, one
user partition, one RPMB partition and four general purpose partitions.
(Refer to JESD84-A44.pdf/page 154)
As bootloader may need to read out or reflashing images on those
different partitions, it is better to enable the partition switch with
console command support.
Also for partition would be restore to user partition(part 0) when CMD0
is used, so change mmc_init routine to perform normal initialization
only once for each slot, unless use the rescan command to force init
again.
Signed-off-by: Lei Wen <leiwen@marvell.com>
Acked-by: Andy Fleming <afleming@freescale.com>
Diffstat (limited to 'common/cmd_mmc.c')
| -rw-r--r-- | common/cmd_mmc.c | 38 |
1 files changed, 34 insertions, 4 deletions
diff --git a/common/cmd_mmc.c b/common/cmd_mmc.c index e266d4fa43..176646d462 100644 --- a/common/cmd_mmc.c +++ b/common/cmd_mmc.c @@ -164,6 +164,7 @@ int do_mmcops(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) return 1; } + mmc->has_init = 0; mmc_init(mmc); return 0; @@ -189,14 +190,22 @@ int do_mmcops(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) print_mmc_devices('\n'); return 0; } else if (strcmp(argv[1], "dev") == 0) { - int dev; + int dev, part = -1; struct mmc *mmc; if (argc == 2) dev = curr_device; else if (argc == 3) dev = simple_strtoul(argv[2], NULL, 10); - else + else if (argc == 4) { + dev = (int)simple_strtoul(argv[2], NULL, 10); + part = (int)simple_strtoul(argv[3], NULL, 10); + if (part > PART_ACCESS_MASK) { + printf("#part_num shouldn't be larger" + " than %d\n", PART_ACCESS_MASK); + return 1; + } + } else return cmd_usage(cmdtp); mmc = find_mmc_device(dev); @@ -205,8 +214,29 @@ int do_mmcops(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) return 1; } + mmc_init(mmc); + if (part != -1) { + int ret; + if (mmc->part_config == MMCPART_NOAVAILABLE) { + printf("Card doesn't support part_switch\n"); + return 1; + } + + if (part != mmc->part_num) { + ret = mmc_switch_part(dev, part); + if (!ret) + mmc->part_num = part; + + printf("switch to partions #%d, %s\n", + part, (!ret) ? "OK" : "ERROR"); + } + } curr_device = dev; - printf("mmc%d is current device\n", curr_device); + if (mmc->part_config == MMCPART_NOAVAILABLE) + printf("mmc%d is current device\n", curr_device); + else + printf("mmc%d(part %d) is current device\n", + curr_device, mmc->part_num); return 0; } else if (strcmp(argv[1], "read") == 0) { @@ -269,6 +299,6 @@ U_BOOT_CMD( "mmc write addr blk# cnt\n" "mmc rescan\n" "mmc part - lists available partition on current mmc device\n" - "mmc dev [dev] - show or set current mmc device\n" + "mmc dev [dev] [part] - show or set current mmc device [partition]\n" "mmc list - lists available devices"); #endif |