Currently we test the cards capabilities for being 8bit capable.
This does not work since noone ever sets this bit. Unfortunately
there is no bit to test 8bit capability, so we introduce a patch
from the kernel which puts the mmc card into 8bit mode and tests
whether it can succesfully read the ext_csd in this mode.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
The mci layer currently passes around a struct device_d for
its internal use. Apart from being confusing this drops
typesafety for no good reason. Instead, pass around a struct
mci.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
As we'll need more arguments to set_ios over time put them
in a struct mci_ios like the kernel does.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
This patch adds MMC over SPI support to mci-core.c and
mci_spi.c driver.
This driver is useful when SOC doesn't have built-in MCI
component. Tested with nios, 2Go SD-CARD and FAT file system.
Signed-off-by: Franck Jullien <franck.jullien@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
This adds the basic framework to handle MCI cards in barebox.
Signed-off-by: Juergen Beisert <jbe@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Sascha Hauer
Juergen Beisert
Franck Jullien