There is no need to check the card-detect status
for non-removable devices.
Signed-off-by: Lucas Stach <dev@lynxeye.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Currently the version defines reflect the digits in the version
number. MMC_VERSION_4_41 is defined as 0x441 and MMC_VERSION_4_5
is defined as 0x405. This results in MMC_VERSION_4_5 < MMC_VERSION_4_41
becoming true which was surely not intended. Fix this by
redefining the versions as 0x<major><minor><micro>. This makes the
string generation more complicated but makes versions comparable
again.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
add optional DSR support. This should go into the kernel, too
Signed-off-by: Markus Niebel <Markus.Niebel@tqs.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
The eMMC and the SD-Card specifications describe the optional SET_DSR command.
During measurements at our lab we found that some cards implementing this feature
having really strong driver strengts per default. This can lead to voltage peaks
above the specification of the host on signal edges for data sent from a card to
the host.
Since availability of a given card type may be shorter than the time a certain
hardware will be produced it is useful to have support for this command (Alternative
would be changing termination resistors and adapting the driver strength of the
host to the used card.)
Signed-off-by: Markus Niebel <Markus.Niebel@tqs.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Year is coded in 4 bits of CID. eMMC 4.41
adds a new interpretation rule: production
year for 4.41 cards and newer is between 2010
and 2025 with 0 corresponding to 2013.
This fix was inspired by currect kernel code.
Signed-off-by: Markus Niebel <Markus.Niebel@tqs.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
eMMC is available up to version 4.5 but the
correct version is not decoded. Change version
definitions to support more minor verions, add
missing versions and parse the minor versions from
ext_csd.
After this, card detection code and devinfo reports
correct versions.
Handling is inspired by u-boot code.
Signed-off-by: Markus Niebel <Markus.Niebel@tqs.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
A lot of files rely on include/driver.h including include/of.h (and
this including include/errno.h. include the files explicitly so we can
eventually get rid of including of.h from driver.h
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Some controller such as the ARM AMBA pl181 can not handle more than 16bits
data length request.
Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
MMC/SD cards normally have a DOS/GPT partition table, but sometimes
barebox uses the unpartitioned area to store its environment. Add
devicetree partition parsing also for SD/MMC cards so that we have
a way to describe the partition in the devicetree.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
The tran_speed field as decoded from csd is valid in most cases,
so use it to determine the maximum clock we can support. It is
not valid though for MMC highspeed cards, in this case the
csd contains invalid values and we have to set tran_speed explicitly
to the maximum speed. As the values passed into mci_set_clock are
now based on tran_speed we no longer have to limit the rate to
tran_speed in mci_set_clock.
The (intended) effect of this patch is that highspeed MMC cards are
no longer limited to non highspeed rates.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
In devinfo for the card also print:
- capabilities for host and card
- current bus width
- current clock
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Use MMC_CAP_ names instead of MMC_MODE_. This makes it more
clear that these are capabilities of host/card and do not refer
to the current mode. These are in line with the Linux Kernel
except for MMC_CAP_MMC_HIGHSPEED_52MHZ which could be fixed
later.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
We already have the possibility to register a mci with a certain
filename to get persistent names. However, the device needed to
find the probe parameter still has the name 'mcix'. This patch
changes this by registering the mci device with the same name
as the filename.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Since the info is device specific and not driver specific, attach
the callback to the device. This makes it possible to have a info
callback for a device which does not have a driver attached.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Some MMC cards support boot partitions. These are special regions
on the MMC card intended to put a bootloader on.
This patch adds support for these partitions, they are accessible
as /dev/diskx.boot[0|1].
Additionally the partitions can be configured bootable using a
device parameter. This can be used to mark the user area or one
of the boot partitions as bootable.
Since this feature is mostly seen on eMMC cards it is made optional
to lower the size impact for boards which do not have eMMC.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
The host limits are only one limit we must honor when changing the transmission frequency.
The SD cards have their own limits, so take them also into account.
Signed-off-by: Juergen Beisert <jbe@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
According to the SD card spec the detection can happen at 400 kHz
Signed-off-by: Juergen Beisert <jbe@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Currently there is no common way for the mci host driver to tell
that thee car is write protected. This adds a card_write_protected callback
which is used by the framework to tell whether it's protected or not.
Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Currently there is no common way for the mci host driver to tell
that there is no card present. This adds a card_present callback
which is used by the framework to tell whether it's present or not.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Always add the 'probe' parameter to cards so that scripts can
rely on the parameter to be present.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
This makes the behaviour more friendly to scripts which can now
set the probe parameter without checking if it has been done before.
Having a succesful result now means that there is a card.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
When multiple MMC/SD cards are present in the system we often
have to have persistent names to identify them during runtime.
This patch allows to overwrite the devicename which is used.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
dev_add_child is a very unsafe function. If called multiple times
it allows setting the same device to different parents thus corrupting
the siblings list. This happens regularly since:
| commit c2e568d19c
| Author: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
| Date: Sat Nov 3 16:11:05 2012 +0100
|
| bus: add bus device
|
| automatically add it as parent of any bus device if none already specified
|
| we have now a nice output per bus
If for example a FATfs is mounted this nice output per bus often ends with:
> `---- fat0
> `---- 0
> `---- 0x86f0000087020031-0x86f000410df27124: /dev/<NULL>
> `---- sram00
> `---- 0x00000000-0xffffffffffffffff: /dev/<NULL>
> `---- 0x00000000-0xffffffffffffffff: /dev/<NULL>
> unable to handle NULL pointer dereference at address 0x0000000c
> pc : [<87f08a20>] lr : [<87f08a04>]
> sp : 86eff8c0 ip : 87f3fbde fp : ffffffff
> r10: ffffffff r9 : 00000000 r8 : 00000003
> r7 : 86f075b8 r6 : 00000002 r5 : ffffffec r4 : 86f07544
> r3 : 00000000 r2 : 43f900b4 r1 : 00000020 r0 : 00000005
> Flags: Nzcv IRQs off FIQs off Mode SVC_32
> [<87f08a20>] (do_devinfo_subtree+0x90/0x130) from [<87f08a90>] (do_devinfo_subtree+0x100/0x130)
>
> [<87f3e070>] (unwind_backtrace+0x0/0x90) from [<87f28514>] (panic+0x28/0x3c)
> [<87f28514>] (panic+0x28/0x3c) from [<87f3e4b8>] (do_exception+0x10/0x14)
> [<87f3e4b8>] (do_exception+0x10/0x14) from [<87f3e544>] (do_data_abort+0x2c/0x38)
> [<87f3e544>] (do_data_abort+0x2c/0x38) from [<87f3e268>] (data_abort+0x48/0x60)
This patch fixes this by adding a device to its parents children list in
register_device so that dev_add_child is no longer needed. This function
is removed from the tree. Now callers of register_device have to clearly
set the parent *before* registering a device.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Reported-by: Jan Lübbe <jlu@pengutronix.de>
This adds the STUFF_BITS macro from the kernel to extract numbers
from the csd. This also fixes several places where the csd fields
in SD cards differ from MMC cards.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
so we print the correct size
Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
so we can detect sd card version 2.0 on spi
as we need to the OCR_HCS on version 2.0 regardless if it's a SPI or not
Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
The FSF address has changed in the past. Instead of updating it
each time the address changes, just drop it completely treewide.
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>
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>
Lucas Stach
Sascha Hauer
Alexander Shiyan
Markus Niebel
Alexander Aring
Jean-Christophe PLAGNIOL-VILLARD
Juergen Beisert
Hubert Feurstein
Robert Jarzmik