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>

1 files changed, 8 insertions, 4 deletions

diff --git a/include/configs/u8500.h b/include/configs/u8500.h
index 21c48fe66..4df4b8952 100644
--- a/include/configs/u8500.h
+++ b/include/configs/u8500.h
@@ -80,6 +80,7 @@
  * Devices and file systems
  */
 #define CONFIG_MMC		1
+#define CONFIG_GENERIC_MMC	1
 #define CONFIG_DOS_PARTITION	1
 
 /*
@@ -126,7 +127,7 @@
 	"commonargs=setenv bootargs cachepolicy=writealloc noinitrd "	\
 		"init=init "						\
 		"board_id=${board_id} "					\
-		"logo.${logo} "					\
+		"logo.${logo} "						\
 		"startup_graphics=${startup_graphics}\0"		\
 	"emmcargs=setenv bootargs ${bootargs} "				\
 		"root=/dev/mmcblk0p2 "					\
@@ -135,7 +136,8 @@
 		"console=${console}\0"					\
 	"emmcboot=echo Booting from eMMC ...; "				\
 		"run commonargs emmcargs addcons memargs;"		\
-		"emmc_read ${loadaddr} 0x14000000 0x300000; "		\
+		"write_partition_block;"				\
+		"mmc read 0 ${loadaddr} 0xA0000 0x4000;"		\
 		"bootm ${loadaddr}\0"					\
 	"cmdfile=mmc init 1;mmc_read_cmd_file;run bootcmd\0"		\
 	"flash=mmc init 1;fatload mmc 1 ${loadaddr} flash.scr;"		\
@@ -211,6 +213,7 @@
  */
 #define MMC_BLOCK_SIZE			512
 #define CFG_MMC_BASE			0x80126000	/* MMC base for 8500  */
+#define CONFIG_MMC_DEV_NUM		1
 
 /*-----------------------------------------------------------------------
  * EMMC related configs
@@ -222,7 +225,8 @@
 #define CONFIG_CMD_SAVEENV	/* CMD_ENV is obsolete but used in env_emmc.c */
 #define CONFIG_ENV_IS_IN_EMMC		1
 #define CONFIG_ENV_OFFSET_START		0x13F80000
-#define CONFIG_ENV_OFFSET_END 		0x13FE0000
+#define CONFIG_ENV_OFFSET_END		0x13FE0000
+#define CONFIG_EMMC_DEV_NUM		0
 
 /*-----------------------------------------------------------------------
  * USB related configs
@@ -242,7 +246,7 @@
  * FLASH and environment organization
  */
 
-#define CONFIG_SYS_MAX_FLASH_SECT 	512	
+#define CONFIG_SYS_MAX_FLASH_SECT 	512
 #define CONFIG_SYS_MAX_FLASH_BANKS	1	/* max number of memory banks */
 
 /*-----------------------------------------------------------------------