3 Commits

Author	SHA1	Message	Date
Thierry Reding	48972d907a	mmc: Implement card detection. ... Check for card detect each time an MMC/SD device is initialized. If card detection is not implemented, this code behaves as before and continues assuming a card is present. If no card is detected, has_init is reset for the MMC/SD device (to force initialization next time) and an error is returned. Signed-off-by: Thierry Reding <thierry.reding@avionic-design.de> Tested-by: Jason Liu <jason.hui@linaro.org>	2012-01-08 21:28:27 -06:00
Thomas Chou	ed018b21d6	mmc_spi: generate response for send status command ... A "send status" command is added with the commit "mmc: checking status after commands with R1b response". But the status register returned from send status command of SPI protocol is different from that of MMC/SD protocol. We do a simple test and generate a response in stead of full bit-by-bit translation. Signed-off-by: Thomas Chou <thomas@wytron.com.tw>	2011-05-18 14:30:34 -05:00
Thomas Chou	d52ebf1022	mmc: add generic mmc spi driver ... This patch supports mmc/sd card with spi interface. It is based on the generic mmc framework. It works with SDHC and supports multi blocks read/write. The crc checksum on data packet is enabled with the def, There is a subcomamnd "mmc_spi" to setup spi bus and cs at run time. Signed-off-by: Thomas Chou <thomas@wytron.com.tw> Signed-off-by: Andy Fleming <afleming@freescale.com>	2011-04-13 06:35:22 -05:00