diff options
| author | Ulf Hansson <ulf.hansson@stericsson.com> | 2010-07-02 13:47:39 +0200 |
|---|---|---|
| committer | Michael BRANDT <michael.brandt@stericsson.com> | 2010-08-11 10:53:36 +0200 |
| commit | 33a2e90bf491f13a4546d09a6105582c0ba7f313 (patch) | |
| tree | b986e40cefe66056013a73977976b1fa38b334c4 /lib_arm | |
| parent | 415211fa4c850467b3e45b7cdb2405ac018dec77 (diff) | |
Replace MMC/SD driver to fit new framework.
IR265772: MMC driver does not detect SDHC cards.
IR254201: Restructure MMC/SD driver for U8500 board according to the
block device framework in mainline U-Boot.
Changes to mmc framework:
- Multi Block Read support in mmc framework.
- Wrap Multi Block Write/Read to be able to adopt for large transaction.
- Removed incorrect check in EXT CSD for high capacity MMC.
- Corrected check for high capacity SD cards.
- Set MMC buswidth to 8, prio of using 4.
Known limitations/bugs in mmc framework:
- High capacity MMC, will likely not get the correct density.
- High speed is set, whether or not the host supports it or not.
board/st/u8500/mmc_utils:
IMPORTANT FOR DEVELOPERS:
- Removed unessary U-Boot commands which is already supported in
cmd_fat.
- mmc_read_cmd_file: Read command.txt into bootcmd env from FAT FS in
SD card.
- write_partition_block: Writes the MBR if it is not already written.
board/st/u8500/mmc_host[c.h]:
- Implements the entire MMC/SD host driver for the PL180 block.
- There is still room for optimization:
Increase CLK-speed.
Use high-speed for SD cards.
Is GPIO setup correctly for both cards an eMMC.
EarlyDrop support not fully tested.
Dynamically turn on voltage/clocks to SD, not always.
More...
Note:
- Increased read/write performance for eMMC, to around 5.4 MB/s for
sequential read/write. Earlier measurements was 3.5 MB/s for read and
2.6 MB/s for write.
ST-Ericsson ID: ER265772, CR267996, ER267993
Change-Id: I921102edbde761407ff5ad476d1bb99f5dc7a2ef
Reviewed-on: http://gerrit.lud.stericsson.com/gerrit/2288
Reviewed-by: Michael BRANDT <michael.brandt@stericsson.com>
Tested-by: Michael BRANDT <michael.brandt@stericsson.com>
Reviewed-by: Martin LUNDHOLM <martin.xa.lundholm@stericsson.com>
Tested-by: Martin LUNDHOLM <martin.xa.lundholm@stericsson.com>
Reviewed-by: Mikael LARSSON <mikael.xt.larsson@stericsson.com>
Tested-by: Mikael LARSSON <mikael.xt.larsson@stericsson.com>
Diffstat (limited to 'lib_arm')
| -rw-r--r-- | lib_arm/board.c | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/lib_arm/board.c b/lib_arm/board.c index 453d66012..33d215aea 100644 --- a/lib_arm/board.c +++ b/lib_arm/board.c @@ -344,6 +344,11 @@ void start_armboot (void) dataflash_print_info(); #endif +#ifdef CONFIG_GENERIC_MMC + puts("MMC: "); + mmc_initialize(gd->bd); +#endif + /* initialize environment */ env_relocate (); @@ -418,11 +423,6 @@ extern void davinci_eth_set_mac_addr (const u_int8_t *addr); board_late_init (); #endif -#ifdef CONFIG_GENERIC_MMC - puts ("MMC: "); - mmc_initialize (gd->bd); -#endif - #ifdef CONFIG_BITBANGMII bb_miiphy_init(); #endif |