From 5a8dbdc6b4b8b4b17c807c9bb23807cdc66f6feb Mon Sep 17 00:00:00 2001 From: Yangbo Lu Date: Wed, 22 Apr 2015 13:57:00 +0800 Subject: mmc: fsl_esdhc: Add adapter card type identification support Add adapter card type identification support by reading FPGA STAT_PRES1 register SDHC Card ID[0:2] bits. To use this function, define CONFIG_FSL_ESDHC_ADAPTER_IDENT. Signed-off-by: Yangbo Lu Cc: York Sun Cc: Pantelis Antoniou [York Sun: resolve conflicts in README.fsl-esdhc] Reviewed-by: York Sun --- doc/README.fsl-esdhc | 28 +++++++++++++++++++++++----- 1 file changed, 23 insertions(+), 5 deletions(-) (limited to 'doc') diff --git a/doc/README.fsl-esdhc b/doc/README.fsl-esdhc index 619c6b2d07..7e71387576 100644 --- a/doc/README.fsl-esdhc +++ b/doc/README.fsl-esdhc @@ -1,6 +1,24 @@ -CONFIG_SYS_FSL_ESDHC_LE means ESDHC IP is in little-endian mode. -CONFIG_SYS_FSL_ESDHC_BE means ESDHC IP is in big-endian mode. -CONFIG_SYS_FSL_ESDHC_FORCE_VSELECT forces to run at 1.8V. +Freescale esdhc-specific options -Accessing ESDHC registers can be determined by ESDHC IP's endian -mode or processor's endian mode. + - CONFIG_FSL_ESDHC_ADAPTER_IDENT + Support Freescale adapter card type identification. This is implemented by + operating Qixis FPGA relevant registers. The STAT_PRES1 register has SDHC + Card ID[0:2] bits showing the type of card installed in the SDHC Adapter Slot. + + SDHC Card ID[0:2] Adapter Card Type + 0b000 reserved + 0b001 eMMC Card Rev4.5 + 0b010 SD/MMC Legacy Card + 0b011 eMMC Card Rev4.4 + 0b100 reserved + 0b101 MMC Card + 0b110 SD Card Rev2.0/3.0 + 0b111 No card is present + - CONFIG_SYS_FSL_ESDHC_LE + ESDHC IP is in little-endian mode. Accessing ESDHC registers can be + determined by ESDHC IP's endian mode or processor's endian mode. + - CONFIG_SYS_FSL_ESDHC_BE + ESDHC IP is in big-endian mode. Accessing ESDHC registers can be determined + by ESDHC IP's endian mode or processor's endian mode. + + - CONFIG_SYS_FSL_ESDHC_FORCE_VSELECT forces to run at 1.8V. -- cgit v1.2.3