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>
We used to loop around the sectors in mci_sd_write/mci_sd_read.
Now that we have multi block read and write this is not necessary
anymore.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Most cards do not answer if some reserved bits
in the ocr are set. However, some controllers
can set bit 7 (reserved for low voltages), but
how to manage low voltages SD card is not yet
specified.
based on the original U-Boot patch from
Stefano Babic <sbabic@denx.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
The idea is to panic() when there is no memory available for normal
operation. Exception: code which can consume arbitrary amount of RAM
(example: files allocated in ramfs) must report error instead of panic().
This patch also fixes code which didn't check for NULL from malloc() etc.
Usage: malloc(), memalign() return NULL when out of RAM.
xmalloc(), xmemalign() always return non-NULL or panic().
Signed-off-by: Krzysztof Hałasa <khc@pm.waw.pl>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Silence this warning:
drivers/mci/mci-core.c:1324: Warning: argument `pdata' of command @param is not found in the argument list of mci_register(struct mci_host *host)
drivers/mci/mci-core.c:1324: Warning: The following parameters of mci_register(struct mci_host *host) are not documented:
parameter host
Signed-off-by: Robert Schwebel <r.schwebel@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Some mci controllers cannot transfer data with their DMA engines
if the data is not sufficiently aligned. Normally this is a driver
problem, but hey, we have no problem aligning the data and keep
the burden from the drivers.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Cc: Juergen Beisert <jbe@pengutronix.de>
Acked-by: Juergen Beisert <jbe@pengurtronix.de>
So far only for reading blocks. This is based on the corresponding
U-Boot code.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Cc: Juergen Beisert <jbe@pengutronix.de>
Acked-by: Juergen Beisert <jbe@pengurtronix.de>
This card is working since 'mci: handle SD cards < 2.0 correctly'
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Tested-by: Jürgen Beisert <jbe@pengutronix.de>
Most SD controllers need some kind of alignment for writing
blocks. Instead of coding this in every driver, align write
blocks to a 4 byte alignment in the mci layer. For DMA
accesses we may need bigger alignment, but let's solve this
problem when we have it.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
With SD cards older than 2.0 the sd_send_if_cond() fails. Do
not assume it's an MMC card in this case. Instead, assume
it's a MMC card if sd_send_op_cond() fails.
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>
Juergen Beisert
Franck Jullien
Sascha Hauer
Robert Schwebel
Jean-Christophe PLAGNIOL-VILLARD
Hubert Feurstein
Krzysztof Halasa
Marek Belisko
Eric Bénard