The first SEND_OP_COND (CMD1) command added is used to ask card capabilities.
After it an AND operation is done between card capabilities and host
capabilities (at the moment only for the voltage field).
Finally the correct value is sent to the MMC, waiting that the card
exits from busy state.
Signed-off-by: Raffaele Recalcati <raffaele.recalcati@bticino.it>
Signed-off-by: Andy Fleming <afleming@freescale.com>
It is recommended to check card status after these kind of commands.
This is done using CMD13 (SEND_STATUS) JEDEC command until
the card is ready.
In case of error the card status field is displayed.
Signed-off-by: Raffaele Recalcati <raffaele.recalcati@bticino.it>
Signed-off-by: Andy Fleming <afleming@freescale.com>
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>
These local vars need not be writable nor exported.
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Andy Fleming <afleming@freescale.com>
The maximum blocks value was hardcoded to 65535 due to a 16 bit
register length. The value can change for different platforms.
This patch makes the default the current value of 65535, but it
is configurable for other platforms.
Signed-off-by: Matt Waddel <matt.waddel@linaro.org>
Signed-off-by: Andy Fleming <afleming@freescale.com>
This patch adds multi-block read support for the generic MMC
driver. Large reads are broken into chunks of 65535 blocks to
ensure that the code works with controllers having a 16 bit block counter.
This patch results in a significant performance improvement.
Time to read a 45 MB file went from 36 seconds to 9 seconds on Overo
Signed-off-by: Steve Sakoman <steve.sakoman@linaro.org>
Tested-by: Steve Sakoman <steve.sakoman@linaro.org>
Signed-off-by: Sandeep Paulraj <s-paulraj@ti.com>
The current mmc write implementation is type ulong, but returns int values.
Some of the printf's are terminated with /n/r, one has none.
This patch fixes these issues and also removes some unnecessary local
variables.
Signed-off-by: Steve Sakoman <steve.sakoman@linaro.org>
Signed-off-by: Sandeep Paulraj <s-paulraj@ti.com>
Constraint the mmc framework to only send no more than 65535
blocks in one go during the multi-write command. This constraint
comes due to the limitation of 16bit width block counter register
at some hardware.
Signed-off-by: Lei Wen <leiwen@marvell.com>
Cc: Reinhard Meyer <u-boot@emk-elektronik.de>
The current mmc driver returns erroneous capacity information for
eMMC. The capacity of eMMC devices is available only in the ext-CSD
register. This patch add code to read the ext-CDSD register and
correctly calculate eMMC capacity.
Signed-off-by: Sukumar Ghorai <s-ghorai@ti.com>
Acked-by: Steve Sakoman <steve@sakoman.com>
Commit d2bf29e3 caused a number of compiler warnings:
mmc.c: In function 'mmc_bwrite':
mmc.c:97: warning: format '%x' expects type 'unsigned int', but argument 2 has type 'long unsigned int'
mmc.c:97: warning: format '%x' expects type 'unsigned int', but argument 3 has type 'lbaint_t'
mmc.c: In function 'mmc_bread':
mmc.c:229: warning: format '%x' expects type 'unsigned int', but argument 2 has type 'long unsigned int'
mmc.c:229: warning: format '%x' expects type 'unsigned int', but argument 3 has type 'lbaint_t'
Fix these.
Signed-off-by: Wolfgang Denk <wd@denx.de>
Cc: Lei Wen <leiwen@marvell.com>
There is be a path through mmc_read in drivers/mmc/mmc.c where
malloc'd memory is not freed before exiting mmc_read: it occurs if
mmc_set_blocklen() returns a non-zero value.
Reported-by: Quentin Armitage <Quentin@Armitage.org.uk>
Signed-off-by: Wolfgang Denk <wd@denx.de>
Most controllers can check if there is a card in the slot.
However, they require pins that could be not available because
required by other functions and the detection of a card must
be performed in another way. This patch adds a weak function
that a board can implement to add its internal custom way
to check the presence of a MMC/SD card.
Signed-off-by: Stefano Babic <sbabic@denx.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.
Signed-off-by: Stefano Babic <sbabic@denx.de>
We need to switch back to 1-bit before initialization or SD 2.0 cards
will fail to send SCR if we've switched to 4-bit already.
Signed-off-by: Ilya Yanok <yanok@emcraft.com>
SCR & switch data are read from card as big-endian words and should be
converted to CPU byte order.
Signed-off-by: Yauhen Kharuzhy <jekhor@gmail.com>
Signed-off-by: Andy Fleming <afleming@freescale.com>
Cards which are not compatible with SD 2.0 standard, may return response
for CMD8 command, but it will be invalid in terms of SD 2.0. We should
accept this case as admissible, just like Linux does.
Signed-off-by: Yauhen Kharuzhy <jekhor@gmail.com>
Signed-off-by: Andy Fleming <afleming@freescale.com>
The mmc code defines the response as an array of chars. However, it
access the response bytes both as (i) an array of four uints (with
casts) and (ii) as individual chars. The former case is used more
often, including by the driver when it assigns the response.
The char-wise accesses are broken on little endian systems because they
assume that the bytes in the uints are in big endian byte order.
This patch fixes this by changing the response to be an array of four
uints and replacing the char-wise accesses with equivalent uint-wise
accesses.
Signed-off-by: Rabin Vincent <rabin@rab.in>
The generic MMC core uses direct long long divisions, which do not build
with ARM EABI toolchains. Use lldiv() instead, which works everywhere.
Signed-off-by: Rabin Vincent <rabin@rab.in>
find_mmc_device returns NULL if an invalid device number is specified.
Check for this to avoid dereferencing NULL pointers.
Signed-off-by: Rabin Vincent <rabin@rab.in>
__attribute__ follows gcc's documented syntax and is generally more
common than __attribute. This change is only asthetic and should not
affect functionality.
Signed-off-by: Peter Tyser <ptyser@xes-inc.com>
Here's a new framework (based roughly off the linux one) for managing
MMC controllers. It handles all of the standard SD/MMC transactions,
leaving the host drivers to implement only what is necessary to
deal with their specific hardware.
This also hooks the infrastructure into the PowerPC board code
(similar to how the ethernet infrastructure now hooks in)
Some of this code was contributed by Dave Liu <daveliu@freescale.com>
Signed-off-by: Andy Fleming <afleming@freescale.com>
