We are already setup voltages from capabilities register.
Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
If a read or write operation encounters an error, the card
might stay in "recv" or "data" state, and never get back to
"tran" state.
In these cases, the host is required to send a CMD12 (end
transmission) to switch the FSM of the card back to "tran"
state, as described in MMC Specification, chapter "Data
Transfer Mode".
Signed-off-by: Robert Jarzmik <robert.jarzmik@free.fr>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Whether the controller works in 8bit mode is not only dependent
on the controller but also on the board having wired up 8 data
lines, so put a capabilities field in platform data.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
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>
Too often I have waited to get a reaction from this driver
when something goes wrong. Use timeout loops instead of
inifinite polling loops.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
This is quite useful when multiple SD cards are present so spare
some bytes to print this information.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
There will always be the next integer number unless we register
INT_MAX disk devices which is rarely the case.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
The mci layer uses pr_debug throughout. Use dev_dbg instead
which is very useful when multiple cards are involved.
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>
The s3c driver passes around a struct device_d * internally in which
it is never interested in. Instead pass around a struct s3c_mci_host
and get rid of all this ugly void * derefs.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Yes, it does make sense. First there will always be the next
hardware which has multiple controllers. Also, we shouldn't
give bad examples to others.
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>
Whether a card is high capacity is checked in
sd_send_op_cond/mmc_send_op_cond. Remove the wrong check in
mmc_change_freq which wrongly recognizes some eMMC flash
as high capacity.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
in commit commit f60f6c58e
atmel_mci: check for device id we use to address the right slot
the driver use the dev_id to detect the slot which is wrong on 9263 as we have
2 devices with 2 slots
use slot_b paramter to specify the slot as done in linux
Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Cc: Michael Grzeschik <m.grzeschik@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
There are major differences in the clock tree of the S3C24xx family and the
more recent CPUs of the S3C family. Keep the S3C24XX clock routines separate to
avoid an ifdef hell. But also use generic function names to be able to
share drivers among the S3C family.
Signed-off-by: Juergen Beisert <jbe@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Start with renaming files to share them in the S3C CPU family,
Signed-off-by: Juergen Beisert <jbe@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
The clock rate was incorrectly calculated, leading to a
frequency of 19.5MHz / 64 instead of 19.5Mz for the host
controller.
with the fix applied, a copy of a file of 230 kB shrinks
from 6000ms to 123ms.
Signed-off-by: Robert Jarzmik <robert.jarzmik@free.fr>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Support the setup of the mmc voltage, when booting OMAP4 with twl6030
from nand.
Signed-off-by: Alexander Aring <a.aring@phytec.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Increase pxa reading performance by reading 4 bytes at a
time instead of 4 reads of 1 byte.
As the mci controller FIFO accepts reads on bytes, halfwords
or words, use words whenether possible.
The boost is for a 250KBytes file read and display (bmp):
- before: 6900ms
- after: 6000ms
Signed-off-by: Robert Jarzmik <robert.jarzmik@free.fr>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
The write data timeout is too small for old cards,
especially the Transcend 256MBytes SD card. Increase it from
10ms to 100ms.
Signed-off-by: Robert Jarzmik <robert.jarzmik@free.fr>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Add a simple PIO based host controller for MMC and SD cards
on PXA SoCs. Reads and writes are available, and no usage is
made of DMA or IRQs.
SPI mode is not supported yet.
Signed-off-by: Robert Jarzmik <robert.jarzmik@free.fr>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
We have to check which sd card slot we use. The registered mmc_id is the
the correct parameter for this.
Signed-off-by: Michael Grzeschik <m.grzeschik@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
as example today if the timeout happened we can not probe the SD card again
Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Without CRC support the mmc spi driver fails to compile with
the following:
drivers/mci/mci_spi.c:74:18: error: static declaration of 'crc7' follows non-static declaration
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
'ATA' means more an interface than a disk drive. Change the names to reflect
their real meaning.
Signed-off-by: Juergen Beisert <jbe@pengutronix.de>
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>
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>
Alexander Shiyan
Robert Jarzmik
Sascha Hauer
Robert P. J. Day
Jean-Christophe PLAGNIOL-VILLARD
Juergen Beisert
Alexander Aring
Michael Grzeschik
Franck Jullien
Robert Schwebel