mmc: mxs: implement detect callback ...

Needed to automatically detect the SD card when it contains the barebox
environment.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

mci: mxs: Drop explicit devname setup code ...

Drop explicit devname setup code. Same setup will be done by
mci_of_parse().

Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

mci: mxs: add support for dt aliases to name devices ...

While changing there, reformat the comment and use ; instead of , after
the previous call.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

driver: replace dev_request_mem_region with dev_request_mem_resource ...

dev_request_mem_region doesn't work properly one some SoCs on which
PTR_ERR() values clash with valid return values from dev_request_mem_region.
Replace them with dev_request_mem_resource where possible.

This patch has been generated with the following semantic patch:

// <smpl>
@@
expression d;
expression n;
expression io;
identifier func;
@@
func(...) {
+struct resource *iores;
<+...
-io = dev_request_mem_region(d, n);
-if (IS_ERR(io)) {
+iores = dev_request_mem_resource(d, n);
+if (IS_ERR(iores)) {
...
-	return PTR_ERR(io);
-}
+	return PTR_ERR(iores);
+}
+io = IOMEM(iores->start);
...+>
}

@@
expression d;
expression n;
expression io;
identifier func;
@@
func(...) {
+struct resource *iores;
<+...
-io = dev_request_mem_region(d, n);
-if (IS_ERR(io)) {
+iores = dev_request_mem_resource(d, n);
+if (IS_ERR(iores))
-	return PTR_ERR(io);
-}
+	return PTR_ERR(iores);
+io = IOMEM(iores->start);
...+>
}

@@
expression d;
expression n;
expression io;
identifier func;
@@
func(...) {
+struct resource *iores;
<+...
-io = dev_request_mem_region(d, n);
-if (IS_ERR(io)) {
-	ret = PTR_ERR(io);
+iores = dev_request_mem_resource(d, n);
+if (IS_ERR(iores)) {
+	ret = PTR_ERR(iores);
...
}
+io = IOMEM(iores->start);
...+>
}

@@
expression d;
expression n;
expression io;
identifier func;
@@
func(...) {
+struct resource *iores;
<+...
-io = dev_request_mem_region(d, n);
+iores = dev_request_mem_resource(d, n);
+if (IS_ERR(iores))
+	return PTR_ERR(iores);
+io = IOMEM(iores->start);
...+>
}

@@
identifier func;
@@
func(...) {
<+...
struct resource *iores;
-struct resource *iores;
...+>
}
// </smpl>

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

mci: mxs: Add devicetree support ...

Add device tree compatibles and allow retrieving data from device tree
instead of platform_data only.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

drivers: remove unnecessary mach/imx-regs.h include ...

And replace the ones needed with the SoC specific header.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

mci: mxs-mci: add f_min/f_max fields unconditionally ...

Parts of the driver need these regardless of whether CONFIG_MCI_INFO
is set, so add these fields unconditionally.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

Typoes: "whith" -> "with" ...

This patch is based on linux kernel commit

    commit e1b8513
    Author: Robert P. J. Day <rpjday@crashcourse.ca>
    Date:   Sun Feb 3 15:14:02 2008 +0200

        Typoes:  "whith" -> "with"

Signed-off-by: Antony Pavlov <antonynpavlov@gmail.com>
Cc: Robert P. J. Day <rpjday@crashcourse.ca>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

resource: Let dev_request_mem_region return an error pointer ...

For all users fix or add the error check.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

mci: mxs: support overwriting the device name via platform data ...

The current implementation of the bootloader specification depends on the
hardware name and the name of the device in /dev to match. As the default
hardware name is mciX and the device name is diskY the bootloader spec
cannot be used as is.

This patch implements a way to overwrite the device name similar to what is
possible for the imx-esdhc driver.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

ARM: MXS: introduce stmp device support ...

MXS specific devices have some common infrastructure in the kernel
known as STMP devices. We have the same in barebox, but with a
mxs_ prefix instead of a stmp_ prefix. As some STMP devices are
also found on i.MX6 move the common infrastructure out of MXS
specific files and use the stmp_ prefix.

This is done in preparation for i.MX6 NAND support.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

mci: mxs: use common clk API ...

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

mci: mxs: Use dev_* ...

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

driver: Attach info callback to device, not to driver ...

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>

MCI/MXS: fix signed/unsigned mismatch ...

Using the MXS MCI driver with an eight bit capable eMMC results into the
'devinfo' message the interface uses '0' bits for data transfer:

 barebox:/ devinfo mxs_mci0
 resources:
 num   : 0
 start : 0x80034000
 size  : 0x00002000
 driver: mxs_mci
 bus: platform

  Interface
   Min. bus clock: 1476 Hz
   Max. bus clock: 48000000 Hz
   Current bus clock: 24000000 Hz
   Bus width: 0 bit

The eight bit interface width is stored internally as value '2'. And a two bit
'2' ends up into 0xfffffffe when used as an array index. Using an unsigned
field instead fixes this issue:

 barebox:/ devinfo mxs_mci0
 resources:
 num   : 0
 start : 0x80034000
 size  : 0x00002000
 driver: mxs_mci
 bus: platform

  Interface
   Min. bus clock: 1476 Hz
   Max. bus clock: 48000000 Hz
   Current bus clock: 24000000 Hz
   Bus width: 8 bit

Signed-off-by: Juergen Beisert <jbe@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

Merge branch 'for-next/mxs'

Merge branch 'for-next/mci'

MCI/MXS: report a better matching error code when the transfer fails ...

EIO is a better error message to describe the data transfer to or from the SD cards has failed.

Signed-off-by: Juergen Beisert <jbe@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

MXS/MCI: simplify reset of the MCI device block ...

Since a generic block reset function is a available, also the MCI driver
should make use of it.

Signed-off-by: Juergen Beisert <jbe@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

MXS/MCI: don't touch variables in the host structure ...

MMC_BUS_WIDTH_* macros do not correspond with the real bus width.
After setting a bus width larger than 1 bit the next call to change the
frequency ends in the default handler and the host interface stays silently
at the previous frequency.

Signed-off-by: Juergen Beisert <jbe@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

Merge branch 'for-next/mxs'

Use new device_platform_driver() macro for drivers ...

Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

ARM mxs: ssp move to common register layout ...

This patch moves the register defines and bit definitions
into one include file. As the defines are common for ssp
and mci devices they can be shared.

Signed-off-by: Michael Grzeschik <m.grzeschik@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

treewide: fix format specifiers ...

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

switch all platform_bus device/driver registering to platform_driver/device_register ...

now register_driver and register_device are for bus only usage.

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>

Treewide: remove address of the Free Software Foundation ...

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>

mci: remove unused device argument from set_ios ...

This argmuent is unused in all drivers, so remove it.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

mci core: replace discrete ios values with struct ios ...

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>

mci mxs: do not use external define for internal use ...

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

Merge branch 'next'