Reviewing the ECSPI reset handling shows two issues:
1. For the enable/reset bit (MXC_CSPICTRL_EN) in the control reg
(ECSPIx_CONGREG) the i.MX6 technical reference manual states:
-- cut --
ECSPIx_CONREG[0]: EN: Writing zero to this bit disables the block
and resets the internal logic with the exception of the ECSPI_CONREG.
-- cut --
Note the exception mentioned: The CONREG itself isn't reset.
Fix this by manually writing the reset value 0 to the whole register.
This sets the EN bit to zero, too (i.e. includes the old
~MXC_CSPICTRL_EN).
2. We want to reset the whole SPI block here. So it makes no sense
to first read the old value of the CONREG and write it back, later.
This will give us the old (historic/random) value of the CONREG back.
And doesn't reset the CONREG.
To get a clean CONREG after the reset of the block, too, don't use
the old (historic/random) value of the CONREG while doing the reset.
And read the clean CONREG after the reset.
This was found while working on a SPI boot device where the i.MX6 boot
ROM has already initialized the SPI block. The initialization by the
boot ROM might be different to what the U-Boot driver wants to configure.
I.e. we need a clean reset of SPI block, including the CONREG.
Signed-off-by: Dirk Behme <dirk.behme@de.bosch.com>
CC: Stefano Babic <sbabic@denx.de>
CC: Fabio Estevam <fabio.estevam@freescale.com>
Apparently, CONFIG_SYS_HZ must be 1000. Change this, and fix the timer
driver to conform to this.
Have the timer implementation export a custom API get_timer_us() for use
by the BCM2835 MMC API, which needs us resolution for a HW workaround.
Signed-off-by: Stephen Warren <swarren@wwwdotorg.org>
Maximum bus width supported by some i.MX6 boards is not 8bit like
others. In case where both host controller and card support 8bit transfers,
they agree to communicate on 8bit interface while some boards support only 4bit interface.
Due to this reason the mmc 8bit default mode fails on these boards. To rectify this,
define maximum bus width supported by these boards (4bit). If max_bus_width is not
defined, it is 0 by default and 8bit width support will be enabled in host
capabilities otherwise host capabilities are modified accordingly.
It is tested with a MMCplus card.
Signed-off-by: Abbas Raza <Abbas_Raza@mentor.com>
cc: stefano Babic <sbabic@denx.de>
cc: Andy Fleming <afleming@gmail.com>
Acked-by: Dirk Behme <dirk.behme@de.bosch.com>
Acked-by: Andrew Gabbasov <andrew_gabbasov@mentor.com>
Enclosing process_nodes() and spi_get_config() inside
CONFIG_OF_CONTROL, since they are compiled only for DT systems.
This fixes following warning:
exynos_spi.c:391:12: warning: 'process_nodes' defined but not used [-Wunused-function]
Signed-off-by: Vivek Gautam <gautam.vivek@samsung.com>
Acked-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>
Add function to parse the required platform data fron DP DT node
and fill the edp_info structure.
Signed-off-by: Ajay Kumar <ajaykumar.rs@samsung.com>
Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>
dp_regs variable was redundantly defined across all the functions in
the driver even though it contains just the same address. We make it
global and initialize it once using exynos_dp_set_base_addr().
>From then on, other funtions can use the address stored in the global variable.
Signed-off-by: Ajay Kumar <ajaykumar.rs@samsung.com>
Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>
Add function to parse FIMD data from device tree.
The driver still supports non-DT case.
Define panel_info statically in some file if you are not using DT.
If you have defined DT node for FIMD, panel_info will be filled
using the bindings of FIMD DT node.
Signed-off-by: Ajay Kumar <ajaykumar.rs@samsung.com>
Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>
fimd_ctrl variable was redundantly defined across all the functions in
the driver even though it contains just the same address. We make it
global and initialize it in exynos_fimd_lcd_init. From then on, other
funtions can use the data in the global variable.
Signed-off-by: Ajay Kumar <ajaykumar.rs@samsung.com>
Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>
Replaced the functionality of callbacks by using a standard set of functions.
Instead of implementing and hooking up a callback, put the same code in one of
the standard set of functions by overriding it.
Signed-off-by: Ajay Kumar <ajaykumar.rs@samsung.com>
Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>
Replaced the functionality of callbacks by using a standard set of functions.
Instead of implementing and hooking up a callback, put the same code in one of
the standard set of functions by overriding it.
This patch is tested only on SMDK5250.
For Trats and universal_c210 board, it is only compile tested.
Signed-off-by: Ajay Kumar <ajaykumar.rs@samsung.com>
Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>
Add driver for tegra114 SPI controller. This controller is not
compatible with either the tegra20 or tegra30 controllers, so it
requires a new driver.
Signed-off-by: Allen Martin <amartin@nvidia.com>
Signed-off-by: Tom Warren <twarren@nvidia.com>
Reviewed-by: Stephen Warren <swarren@nvidia.com>
Add support for Winbond W25Q32DW 32Mbit part
Signed-off-by: Allen Martin <amartin@nvidia.com>
Signed-off-by: Tom Warren <twarren@nvidia.com>
Reviewed-by: Stephen Warren <swarren@nvidia.com>
Add a common interface to fdt based SPI drivers. Each driver is
represented by a table entry in fdt_spi_drivers[]. If there are
multiple SPI drivers in the table, the first driver to return success
from spi_init() will be registered as the SPI driver.
Signed-off-by: Allen Martin <amartin@nvidia.com>
Signed-off-by: Tom Warren <twarren@nvidia.com>
Reviewed-by: Stephen Warren <swarren@nvidia.com>
Make the tegra20 SPI driver similar to the tegra30 (and soon to be
tegra114) SPI drivers in preparation of common fdt SPI driver front
end.
Signed-off-by: Allen Martin <amartin@nvidia.com>
Signed-off-by: Tom Warren <twarren@nvidia.com>
Reviewed-by: Stephen Warren <swarren@nvidia.com>
Move register structs from headers into .c files and use common name.
This is in preparation of making common fdt front end for SPI
drivers.
Signed-off-by: Allen Martin <amartin@nvidia.com>
Signed-off-by: Tom Warren <twarren@nvidia.com>
Reviewed-by: Stephen Warren <swarren@nvidia.com>
Remove non fdt support from tegra20 and tegra30 SPI drivers in
preparation of new common fdt based SPI driver front end.
Signed-off-by: Allen Martin <amartin@nvidia.com>
Signed-off-by: Tom Warren <twarren@nvidia.com>
Reviewed-by: Stephen Warren <swarren@nvidia.com>
Rename tegra SPI drivers to tegra20_flash and tegra20_slink in
preparation for commonization and addition of tegra114_spi.
Signed-off-by: Allen Martin <amartin@nvidia.com>
Signed-off-by: Tom Warren <twarren@nvidia.com>
Reviewed-by: Stephen Warren <swarren@nvidia.com>
This feature was only used for tegra20 seaboard that had a pinmux
conflict on the SPI pins. These boards were never manufactured, so
remove this support to clean up SPI driver.
Signed-off-by: Allen Martin <amartin@nvidia.com>
Signed-off-by: Tom Warren <twarren@nvidia.com>
Reviewed-by: Stephen Warren <swarren@nvidia.com>
Gets rid of warnings from omap_gpio:
ERROR : check_gpio: invalid GPIO -1
(and undefined behaviour as the -1 error code is interpreted as gpio value)
Signed-off-by: Peter Korsgaard <peter.korsgaard@barco.com>
Let mmc_getcd() return true and mmc_getwp() false if mmc driver doesn't
provide handlers for them.
Signed-off-by: Peter Korsgaard <peter.korsgaard@barco.com>
[trini: Add braces around first if test in each case to fix warning]
Signed-off-by: Tom Rini <trini@ti.com>
- In arch/arm/cpu/armv7/omap-common/timer.c,
drivers/mtd/nand/omap_gpmc.c and drivers/net/cpsw.c add #include files
that the driver needs but had been relying on <config.h> to bring in.
- In arch/arm/cpu/armv7/omap-common/lowlevel_init.S add <config.h>
- In am335x_evm.h and pcm051.h don't globally include
<asm/arch/hardware.h> and <asm/arch/cpu.h> but just <asm/arch/omap.h>
as that is the only include which defines things the config uses.
Cc: Lars Poeschel <poeschel@lemonage.de>
Signed-off-by: Tom Rini <trini@ti.com>
This adds a simple driver for the BCM2835's SD controller.
Workarounds are implemented for:
* Register writes can't be too close to each-other in time, or they will
be lost.
* Register accesses must all be 32-bit, so implement custom accessors.
This code was extracted from:
git://github.com/gonzoua/u-boot-pi.git master
which was created by Oleksandr Tymoshenko.
Portions of the code there were obviously based on the Linux kernel at:
git://github.com/raspberrypi/linux.git rpi-3.6.y
commit f5b930b "Main bcm2708 linux port" signed-off-by Dom Cobley.
swarren changed the following for upstream:
* Removed hack udelay()s in bcm2835_sdhci_raw_writel(); setting
SDHCI_QUIRK_WAIT_SEND_CMD appears to solve the issues.
* Remove register logging from read*/write* functions.
* Sort out confusion with min/max_freq values passed to add_sdhci().
* Use more descriptive variable names and calculations in IO accessors.
* Simplified and commented twoticks_delay calculation.
* checkpatch fixes.
Cc: Andy Fleming <afleming@gmail.com>
Signed-off-by: Oleksandr Tymoshenko <gonzo@bluezbox.com>
Signed-off-by: Stephen Warren <swarren@wwwdotorg.org>
Acked-by: Andy Fleming <afleming@gmail.com>
The firmware running on the bcm2835 SoC's VideoCore CPU manages the
display controller. Add a simple "LCD" driver that communicates with the
firmware using the property mailbox protocol. This configures the
display and frame-buffer to match whatever physical resolution the
firmware chosen when booting, which is typically the native resolution
of the attached display device, presumably unless otherwise specified
in config.txt on the boot media.
Enable this driver in the Raspberry Pi board configuration.
Signed-off-by: Stephen Warren <swarren@wwwdotorg.org>
Acked-by: Anatolij Gustschin <agust@denx.de>
Enable device tree control of SPI flash, and use this to implement
memory-mapped SPI flash, which is supported on Intel chips.
Signed-off-by: Simon Glass <sjg@chromium.org>
This SPI controller can only write 64 bytes at a time. Add this restriction
in so that 'sf write' works correct for blocks larger than 64 bytes.
Signed-off-by: Simon Glass <sjg@chromium.org>
Some SPI flash controllers (e.g. Intel ICH) have a limit on the number of
bytes that can be in a write transaction. Support this by breaking the
writes into multiple transactions.
Signed-off-by: Simon Glass <sjg@chromium.org>
This supports Intel ICH7/9. The Intel controller is a little unusual in
that it is mostly intended for use with SPI flash, and has some
optimisations and features specifically for that application. In
particular it is not possible to support ongoing transactions that
continue over many calls with SPI_XFER_BEGIN and SPI_XFER_END.
This driver supports writes of up to 64 bytes at a time, the limit
for the controller. Future work will improve this.
Signed-off-by: Bernie Thompson <bhthompson@chromium.org>
Signed-off-by: Duncan Laurie <dlaurie@chromium.org>
Signed-off-by: Bill Richardson <wfrichar@chromium.org>
Signed-off-by: Vadim Bendebury <vbendeb@chromium.org>
Signed-off-by: Gabe Black <gabeblack@chromium.org>
Signed-off-by: Simon Glass <sjg@chromium.org>
Rather than each device having its own way to allocate a SPI flash
structure, use the new allocation function everywhere. This will make it
easier to extend the interface without breaking devices.
Signed-off-by: Simon Glass <sjg@chromium.org>
At present it is difficult to extend the SPI flash structure since
all devices allocate it themselves, and few of them zero all fields.
Add a new function spi_flash_alloc() which can be used by SPI devices
to perform this allocation, and thus ensure that all devices can
better cope with SPI structure changes.
Signed-off-by: Simon Glass <sjg@chromium.org>
Rather than each driver having its own way to allocate a SPI slave,
use the new allocation function everywhere. This will make it easier
to extend the interface without breaking drivers.
Signed-off-by: Simon Glass <sjg@chromium.org>
At present it is difficult to extend the SPI structure since all
drivers allocate it themselves, and few of them zero all fields. Add
a new function spi_alloc_slave() which can be used by SPI drivers
to perform this allocation, and thus ensure that all drivers can
better cope with SPI structure changes.
Signed-off-by: Simon Glass <sjg@chromium.org>
Albert's rework of the linker scripts conflicted with Simon's making
everyone use __bss_end. We also had a minor conflict over
README.scrapyard being added to in mainline and enhanced in
u-boot-arm/master with proper formatting.
Conflicts:
arch/arm/cpu/ixp/u-boot.lds
arch/arm/cpu/u-boot.lds
arch/arm/lib/Makefile
board/actux1/u-boot.lds
board/actux2/u-boot.lds
board/actux3/u-boot.lds
board/dvlhost/u-boot.lds
board/freescale/mx31ads/u-boot.lds
doc/README.scrapyard
include/configs/tegra-common.h
Build tested for all of ARM and run-time tested on am335x_evm.
Signed-off-by: Tom Rini <trini@ti.com>
Use the ability to have several active EHCI controller on a system
in the PCI EHCI controller implementation.
Signed-off-by: Simon Glass <sjg@chromium.org>
[port of Linux kernel commit bcd218be5aeb by Steve Glendinning]
The eeprom read & write commands currently check the E2P_CMD_LOADED_ bit is
set before allowing any operations. This prevents any reading or writing
unless a correctly programmed EEPROM is installed.
Signed-off-by: Michael Spang <spang@chromium.org>
Signed-off-by: Simon Glass <sjg@chromium.org>
Acked-by: Marek Vasut <marex@denx.de>
The interrupt endpoint handling code stores the buffer pointer in the QH
padding field. We need to make it the size of a pointer to avoid strict
aliasing issue with the compiler.
Signed-off-by: Vincent Palatin <vpalatin@chromium.org>
Signed-off-by: Simon Glass <sjg@chromium.org>
Interrupt transfers aren't meant to be used from the async list
(the EHCI spec indicates trouble with low/full-speed intr on async).
Build a periodic list instead, and provide an API to make use of it.
Then, use that API from the existing interrupt transfer API.
This provides support for USB keyboards using EHCI.
Use timeouts to ensure we cannot get stuck in the keyboard scanning
if something wrong happens (USB device unplugged or fatal I/O error)
Signed-off-by: Vincent Palatin <vpalatin@chromium.org>
Signed-off-by: Julius Werner <jwerner@chromium.org>
Signed-off-by: Simon Glass <sjg@chromium.org>
Enabling the non-dt path for the driver so that
we don't get any build errors for non-dt configuration.
Signed-off-by: Vivek Gautam <gautam.vivek@samsung.com>
Acked-by: Simon Glass <sjg@chromium.org>
With current FDT support driver tries to parse device node
twice in ehci_hcd_init() and ehci_hcd_stop(), which shouldn't
happen ideally.
Making provision to store data in a global structure and thereby
passing its pointer when needed.
Signed-off-by: Vivek Gautam <gautam.vivek@samsung.com>
This patch adds the USB Mass Storage Gadget to u-boot
New command called "ums" is implemented to provide access
to on-device embedded persistent memory.
USB Mass Storage is supposed to work on top of the USB
Gadget framework
Signed-off-by: Lukasz Majewski <l.majewski@samsung.com>
Signed-off-by: Piotr Wilczek <p.wilczek@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
CC: Marek Vasut <marek.vasut@gmail.com>
The storage_common.c source file from v2.6.36 Linux kernel.
commit d26a6aa08b9f12b44fb1ee65625e7480d3d5bb81
Author: Michal Nazarewicz <m.nazarewicz@samsung.com>
Date: Mon Nov 9 14:15:23 2009 +0100
USB: g_mass_storage: code cleaned up and comments updated
Signed-off-by: Lukasz Majewski <l.majewski@samsung.com>
Signed-off-by: Andrzej Pietrasiewicz <andrzej.p@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
CC: Marek Vasut <marek.vasut@gmail.com>
