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 /board/st/u8500/u8500.c | |
| 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 'board/st/u8500/u8500.c')
| -rw-r--r-- | board/st/u8500/u8500.c | 8 |
1 files changed, 0 insertions, 8 deletions
diff --git a/board/st/u8500/u8500.c b/board/st/u8500/u8500.c index 7c47ab977..eb6dda5af 100644 --- a/board/st/u8500/u8500.c +++ b/board/st/u8500/u8500.c @@ -420,7 +420,6 @@ static void init_regs(void) } } else { struct prcmu *prcmu = (struct prcmu *) U8500_PRCMU_BASE; - u32 tmp; /* Enable timers */ writel(1 << 17, &prcmu->tcr); @@ -435,13 +434,6 @@ static void init_regs(void) u8500_prcmu_enable(&prcmu->uartclk_mgt); u8500_prcmu_enable(&prcmu->i2cclk_mgt); - if (!u8500_is_earlydrop()) { - /* Switch SDMMCCLK to 52Mhz instead of 104Mhz */ - tmp = readl(&prcmu->sdmmcclk_mgt); - tmp = (tmp & ~0x1f) | 16; - writel(tmp, &prcmu->sdmmcclk_mgt); - } - u8500_prcmu_enable(&prcmu->sdmmcclk_mgt); u8500_clock_enable(1, 9, -1); /* GPIO0 */ |