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>
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>
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 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>
The CONFIG_MXS_SPI_DMA_ENABLE is no longer relevant as the SPI DMA
has proven to work correctly. Remove this configuration option.
Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Fabio Estevam <fabio.estevam@freescale.com>
Cc: Otavio Salvador <otavio@ossystems.com.br>
Cc: Stefano Babic <sbabic@denx.de>
The MX23 has slightly different register layout. Adjust the SPI
driver to match the layout, both the PIO and DMA part.
Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Fabio Estevam <fabio.estevam@freescale.com>
Cc: Otavio Salvador <otavio@ossystems.com.br>
Cc: Stefano Babic <sbabic@denx.de>
This patch streamlines the differences between the MX23 and MX28 by
implementing a few helper functions to handle different DMA channel
mapping, different clock domain for SSP block and fixes a few minor
bugs.
First of all, the DMA channel mapping is now fixed in dma.h by defining
the actual channel map for both MX23 and MX28. Thus, MX23 now does no
longer use MX28 channel map which was wrong. Also, there is a fix for
MX28 DMA channel map, where the last four channels were incorrect.
Next, because correct DMA channel map is in place, the mxs_dma_init_channel()
call now bases the channel ID starting from SSP port #0. This removes the
need for DMA channel offset being added and cleans up the code. For the
same reason, the SSP0 offset can now be used in mxs_dma_desc_append(), thus
no need to adjust dma channel number in the driver either.
Lastly, the SSP clock ID is now retrieved by calling mxs_ssp_clock_by_bus()
which handles the fact that MX23 has shared SSP clock for both ports, while
MX28 has per-port SSP clock.
Finally, the mxs_ssp_bus_id_valid() pulls out two implementations of the
same functionality from MMC and SPI driver into common code.
Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Fabio Estevam <fabio.estevam@freescale.com>
Cc: Otavio Salvador <otavio@ossystems.com.br>
Cc: Stefano Babic <sbabic@denx.de>
Spi driver for bf60x is different from old one, so implement a new
driver for it.
Signed-off-by: Scott Jiang <scott.jiang.linux@gmail.com>
Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
Signed-off-by: Bob Liu <lliubbo@gmail.com>
Signed-off-by: Sonic Zhang <sonic.adi@gmail.com>
Add driver for tegra SPI "SLINK" style driver. This controller is
similar to the tegra20 SPI "SFLASH" controller. The difference is
that the SLINK controller is a genernal purpose SPI controller and the
SFLASH controller is special purpose and can only talk to FLASH
devices. In addition there are potentially many instances of an SLINK
controller on tegra and only a single instance of SFLASH. Tegra20 is
currently ths only version of tegra that instantiates an SFLASH
controller.
This driver supports basic PIO mode of operation and is configurable
(CONFIG_OF_CONTROL) to be driven off devicetree bindings. Up to 4
devices per controller may be attached, although typically only a
single chip select line is exposed from tegra per controller so in
reality this is usually limited to 1.
To enable this driver, use CONFIG_TEGRA_SLINK
Signed-off-by: Allen Martin <amartin@nvidia.com>
Signed-off-by: Tom Warren <twarren@nvidia.com>
Add support for configuring tegra SPI driver from devicetree.
Support is keyed off CONFIG_OF_CONTROL. Add entry in seaboard dts
file for spi controller to describe seaboard spi.
Signed-off-by: Allen Martin <amartin@nvidia.com>
Signed-off-by: Tom Warren <twarren@nvidia.com>
Create function which converts SSP bus number to SSP register pointer.
This functionality is reimplemented multiple times in the code, thus
make one common implementation. Moreover, make it a switch(), since the
SSP ports are not mapped in such nice linear fashion on MX23, therefore
having it a switch will simplify things there.
Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Andy Fleming <afleming@freescale.com>
Cc: Fabio Estevam <fabio.estevam@freescale.com>
Cc: Stefano Babic <sbabic@denx.de>
This saves stack and code memory for local copy, and
consumes initialized data memory. For 22 of the 29
kirkwood-based boards, this results in a global saving
of about 30 bytes. For 7 of them, it results in an
increase of 6 to 14 bytes.
Signed-off-by: Albert ARIBAUD <albert.u.boot@aribaud.net>
This patch adds FDT support to the SPI driver.
Signed-off-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Rajeshwari Shinde <rajeshwari.s@samsung.com>
Acked-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>
Added posted writes (read after writes) to effect the
change immediately for channel confiuration and channel
enable register
Disable the channel to purge receieve data in TX_ONLY
mode transfer otherwise rx data will get affected by
the next immediate RX_ONLY mode transfer
Wait for the EOT bit to be set after last byte has been
loaded to TX shift register in the the TX_ONLY mode.This
ensures TX data has been completely shifted out
Disable the channel in RX_ONLY mode before reading the
last data from RXX register to prevent the SPI slave
to transmit next word
Signed-off-by: Ajoy Kumar Das <akdas75@yahoo.in>
Cc: Tom Rini <trini@ti.com>
Cc: jacopo mondi <j.mondi@voltaelectronics.com>
The at91sam9m10g45 also support WDRBT bit, add support for it
Signed-off-by: Bo Shen <voice.shen@atmel.com>
Signed-off-by: Andreas Bießmann <andreas.devel@googlemail.com>
Measuring the spi clock line on a scope shows a 'glitch' during the reset of the
spi.
Fix this by toggling only the MXC_CSPICTRL_EN bit, so that the clock line becomes
always stable.
Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Acked-by: Stefano Babic <sbabic@denx.de>
In decode_cs() function the polarity of the chip select must be taken into
account.
Also, for the case of low active chip select, the CS was activated too early.
Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
This patch adds SPI driver for EXYNOS.
Signed-off-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Padmavathi Venna <padma.v@samsung.com>
Signed-off-by: Gabe Black <gabeblack@google.com>
Signed-off-by: Rajeshwari Shinde <rajeshwari.s@samsung.com>
Signed-off-by: Hatim Ali <hatim.rv@samsung.com>
Acked-by: Mike Frysinger <vapier@gentoo.org>
Acked-by: Simon Glass <sjg@chromium.org>
Tested-by: jy0922.shim@samsung.com
Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>
D0/D1 Swapped or not is a board property, not anything specific to
the am33xx SoC, so add a custom define for it.
At the same time correct the bit handling for the swapped mode
(DPE0 should be cleared and SI/DPE1 set).
Signed-off-by: Peter Korsgaard <peter.korsgaard@barco.com>
Current espi controller driver assumes the command length of write command is
not equal to '1', it was made based on SPANSION SPI flash, but some SPI flash
driver such as SST does use write command length as '1', so write command on
SST SPI flash will not work. And the length check for write command is not
necessary for SPANSION, though it's harmless for SPANSION, it will stop write
operation on flashes like SST, so we remove the check.
Signed-off-by: Shaohui Xie <Shaohui.Xie@freescale.com>
Signed-off-by: Andy Fleming <afleming@freescale.com>
The move is pretty straight-forward. ap20.h and tegra20.h were renamed to ap.h and tegra.h.
Some files remain in arch-tegra20 but 'include' a file in 'arch-tegra' with #defines & structs
that will be common between T20 and T30 HW. HW-specific #defines, etc. stay in the 'arch-tegra20'
'root' file.
All boards build OK w/MAKEALL -s tegra20. Checkpatch.pl runs clean. Seaboard works OK.
Signed-off-by: Tom Warren <twarren@nvidia.com>
This patch adds a driver for Freescale Colfire Queued SPI bus.
Coded to work with 8 bits per transfer to use with SPI flash.
CPOL, CPHA, and CS_ACTIVE_HIGH can be configured.
Tested with MCF5270 which have 4 chip selects.
Activate by #define CONFIG_CF_QSPI in board config.
Signed-off-by: Richard Retanubun <richardretanubun@ruggedcom.com>
The MPC8308RDB Reference Manual states that no bits in the SPMODE
register are allowed to change while the enable (EN) bit is set.
This driver changes the character length bits (LEN) while the enable
(EN) bit is set. Clearing the EN bit while changing the LEN bits makes
the driver work correctly on MPC8308RDB.
Signed-off-by: Ira W. Snyder <iws@ovro.caltech.edu>
Signed-off-by: Kim Phillips <kim.phillips@freescale.com>
Warning is:
xilinx_spi.c: In function 'spi_setup_slave':
xilinx_spi.c:81: warning: unused variable 'regs'
Signed-off-by: Stephan Linz <linz@li-pro.net>
CC: Michal Simek <monstr@monstr.eu>
Convert TEGRA20_ defines to either TEGRA_ or NV_PA_ where appropriate.
Convert tegra20_ source file and function names to tegra_, also.
Upcoming Tegra30 port will use common code/defines/names where possible.
Signed-off-by: Tom Warren <twarren@nvidia.com>
Acked-by: Stephen Warren <swarren@nvidia.com>
It turns out that in order for the SPI DMA to properly support
continuous transfers longer than 65280 bytes, there are some very
important parts that were left out from the documentation.
Firstly, the XFER_SIZE register is not written with the whole length
of a transfer, but is written by each and every chained descriptor
with the length of the descriptors data buffer.
Next, unlike the demo code supplied by FSL, which only writes one PIO
word per descriptor, this does not apply if the descriptors are chained,
since the XFER_SIZE register must be written. Therefore, it is essential
to use four PIO words, CTRL0, CMD0, CMD1, XFER_SIZE. CMD0 and CMD1 are
written with zero, since they don't apply. The DMA programs the PIO words
in an incrementing order, so four PIO words.
Finally, unlike the demo code supplied by FSL, the SSP_CTRL0_IGNORE_CRC
must not be set during the whole transfer, but it must be set only on the
last descriptor in the chain.
Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Fabio Estevam <festevam@gmail.com>
Cc: Otavio Salvador <otavio@ossystems.com.br>
Cc: Stefano Babic <sbabic@denx.de>
This patch fixes dcache-related problem. The problem manifested
when dcache was enabled and the following command issued twice:
mw 0x42000000 0 0x4000 ; sf probe ; sf read 0x42000000 0x0 0x10000 ; sha1sum 0x42000000 0x10000
The SHA1 checksum was correct during the first call. Yet with
every subsequent call of the above command, it differed and was
wrong.
It turns out this was because of a race condition. On the first
time the command was called, no cacheline contained any data from
the destination memory location. The DMA transfered data into the
location and the cache above the location was invalidated. Then the
checksum was computed, but that meant the data were loaded into data
cache.
On any subsequent call, the DMA again transfered data into the same
destination. Yet during the transfer, some of the DCache lines were
evicted and written back into the main memory. Once the DMA transfer
completed, the data cache was invalidated over the memory location as
usual. But the data that were to be loaded back into the data cache
by subsequent SHA1 checksuming were corrupted.
Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Fabio Estevam <festevam@gmail.com>
Cc: Otavio Salvador <otavio@ossystems.com.br>
Cc: Stefano Babic <sbabic@denx.de>
The computation was not correct with low clock values: setting a 1MHz
clock would result in an overlap that would then configure a 25Mhz
clock.
This patch implements a correct computation method according to the
kirkwood functionnal spec. table 600 (Serial Memory Interface
Configuration Register).
Signed-off-by: Valentin Longchamp <valentin.longchamp@keymile.com>
cc: Holger Brunck <holger.brunck@keymile.com>
cc: Prafulla Wadaskar <prafulla@marvell.com>
Acked-by: Prafulla Wadaskar <Prafulla@marvell.com>
Signed-off-by: Prafulla Wadaskar <prafulla@marvell.com>
The atmel at91sam9x5 series spi has feature to avoid receive overren
Using the patch to enable it
Signed-off-by: Bo Shen <voice.shen@atmel.com>
Acked-by: Andreas Bießmann <andreas.devel@googlemail.com>
Signed-off-by: Andreas Bießmann <andreas.devel@googlemail.com>
This change implements DMA chaining into SPI driver. This allows
the transfers to go much faster, while also fixing SF issues.
Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Fabio Estevam <festevam@gmail.com>
Cc: Otavio Salvador <otavio@ossystems.com.br>
Cc: Stefano Babic <sbabic@denx.de>
Use calloc() instead of malloc() to allocate the mxs_spi_slave structure.
Clearing the memory is necessary since most of the time this gets done
super early in boot, but on warm reboots, and when SPI probing is done
long after the init stages it could actually pick up previously used memory,
and things like the chipselect polarity and other data end up being filled
with trash data if not explicitly set by the board files.
This solves a semi-random, almost unreproducable error whereby SPI devices
act very, very strangly on boot.
Signed-off-by: Matt Sealey <matt@genesi-usa.com>
Acked-by: Stefano Babic <sbabic@denx.de>
Use calloc() instead of malloc() to allocate the mxc_spi_slave structure.
Clearing the memory is necessary since most of the time this gets done
super early in boot, but on warm reboots, and when SPI probing is done
long after the init stages it could actually pick up previously used memory,
and things like the chipselect polarity and other data end up being filled
with trash data if not explicitly set by the board files.
This solves a semi-random, almost unreproducable error whereby SPI devices
act very, very strangly on boot. Tested on Efika MX over several years..
Signed-off-by: Matt Sealey <matt@genesi-usa.com>
Acked-by: Stefano Babic <sbabic@denx.de>
Since the input frequency of the API is a maximum that should not be exceeded in
order for the devices to operate properly, the SPI clock divider should be
rounded up, not truncated.
Signed-off-by: Benoît Thébaudeau <benoit.thebaudeau@advansee.com>
Cc: Wolfgang Denk <wd@denx.de>
Cc: Stefano Babic <sbabic@denx.de>
Acked-by: Stefano Babic <sbabic@denx.de>
The sys_proto.h functions (except the boot modes) are compatible with
i.MX233 and i.MX28 so we use 'mxs' prefix for its methods.
Signed-off-by: Otavio Salvador <otavio@ossystems.com.br>
This is make naming consistent with the kernel and devicetree and in
preparation of pulling out the common tegra20 code.
Signed-off-by: Allen Martin <amartin@nvidia.com>
Acked-by: Stephen Warren <swarren@wwwdotorg.org>
Tested-by: Thierry Reding <thierry.reding@avionic-design.de>
Signed-off-by: Tom Warren <twarren@nvidia.com>
The DMA transfers happen only if the transfered data are larger
than 512 bytes. Otherwise PIO is used. This is a small speed
optimization.
The DMA transfer doesn't work if unaligned transfer is requested
due to the limitation of the DMA controller. This has to be fixed
by introducing generic bounce buffer. Therefore the DMA feature
is now disabled by default.
Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Fabio Estevam <festevam@gmail.com>
Cc: Otavio Salvador <otavio@ossystems.com.br>
Cc: Stefano Babic <sbabic@denx.de>
Cc: Wolfgang Denk <wd@denx.de>
Pull out all the PIO transfer logic into separate function,
so DMA can be added.
Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Fabio Estevam <festevam@gmail.com>
Cc: Otavio Salvador <otavio@ossystems.com.br>
Cc: Stefano Babic <sbabic@denx.de>
Cc: Wolfgang Denk <wd@denx.de>
This makes it easier to adapt for addition of DMA support.
Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Fabio Estevam <festevam@gmail.com>
Cc: Otavio Salvador <otavio@ossystems.com.br>
Cc: Stefano Babic <sbabic@denx.de>
Cc: Wolfgang Denk <wd@denx.de>
The patch "spi: tegra2: rename tegra2_spi.* to tegra_spi.*"
(sha1: edffa63d3d)
renamed tegra2_spi.c to tegra_spi.c
and the patch "Merge branch 'master' of git://git.denx.de/u-boot-microblaze"
(sha1: d978780b2e)
has wrongly resolved confict.
This patch fix it.
Signed-off-by: Michal Simek <monstr@monstr.eu>
* 'master' of git://git.denx.de/u-boot-microblaze:
microblaze: Wire up SPI driver
spi: microblaze: Adds driver for Xilinx SPI controller
microblaze: intc: Clear interrupt code
microblaze: Call serial multi initialization
microblaze: Move __udelay implementation
microblaze: Remove extern from board.c
microblaze: Wire up dts configuration
fdt: Add board specific dts inclusion
microblaze: Move individual board linker scripts to common script in cpu tree.
microblaze: Add gpio.h
microblaze: Add missing undefs for UBI and UBIFS
microblaze: Expand and correct configuration comments
microblaze: Enable ubi support
microblaze: Avoid compile error on systems without cfi flash
microblaze: Remove wrong define CONFIG_SYS_FLASH_PROTECTION
Conflicts:
drivers/spi/Makefile
Signed-off-by: Wolfgang Denk <wd@denx.de>
This is an improved version of the driver patch original
submitted by Graeme Smecher <graeme.smecher@mail.mcgill.ca>
The changes are:
- remove hard coded Xilinx BSP defines (XPAR_SPI_*) and
use CONFIG_SYS_SPI_BASE from config.h instead
- add extensive register struct definitions
- remove offset calculation for register access and
use the new register struct instead
- move default SPI controller configuration from
spi_setup_slave() to spi_claim_bus()
- add spi_set_speed()
- insert SPI controller deactivation in spi_release_bus()
- protect while loops in spi_xfer() with counter / timeouts
- support SPI mode flags: LSB_FIRST, CPHA, CPOL, LOOP
Come from:
http://patchwork.ozlabs.org/patch/71797/
Signed-off-by: Stephan Linz <linz@li-pro.net>
Tested-by: Michal Simek <monstr@monstr.eu>
MXS SSP controller may have up to three chip selects per port: SS0, SS1 and SS2.
Currently only SS0 is supported in the mxs_spi driver.
Allow all the three chip select to work by selecting the desired one
in bits 20 and 21 of the HW_SSP_CTRL0 register.
Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Acked-by: Marek Vasut <marex@denx.de>
Introduce spi_cs_is_valid() for validating spi bus and chip select numbers.
Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Acked-by: Marek Vasut <marex@denx.de>
Acked-by: Mike Frysinger <vapier@gentoo.org>
* 'master' of git://git.denx.de/u-boot-arm: (146 commits)
arm: Use common .lds file where possible
arm: add a common .lds link script
arm: Remove unneeded setting of LDCSRIPT
Define CPUDIR for the .lds link script
arm: Remove zipitz2 link script
Allow arch directory to contain .lds without requiring Makefile
OMAP: Remove omap1610inn-based boards
arch/arm/cpu/armv7/omap-common/clocks-common.c: Fix build warnings
board/ti/beagle/beagle.c: Fix build warnings
sdrc.c: Fix typo in do_sdrc_init() for SPL
tegra: i2c: Add I2C driver
tegra: fdt: i2c: Add extra I2C bindings for U-Boot
tegra: i2c: Select I2C ordering for Seaboard
tegra: i2c: Enable I2C on Seaboard
tegra: i2c: Select number of controllers for Tegra2 boards
tegra: i2c: Initialise I2C on Nvidia boards
tegra: Enhance clock support to handle 16-bit clock divisors
fdt: Add function to allow aliases to refer to multiple nodes
tegra: Rename NV_PA_PMC_BASE to TEGRA2_PMC_BASE
tegra: fdt: Enable FDT support for Ventana
tegra: fdt: Enable FDT support for Seaboard
tegra: usb: Enable USB on Seaboard
tegra: usb: Add common USB defines for tegra2 boards
tegra: usb: Add USB support to nvidia boards
arm: Check for valid FDT after console is up
fdt: Avoid early panic() when there is no FDT present
tegra: usb: Add support for Tegra USB peripheral
tegra: fdt: Add function to return peripheral/clock ID
usb: Add support for txfifo threshold
tegra: usb: fdt: Add USB definitions for Tegra2 Seaboard
tegra: usb: fdt: Add additional device tree definitions for USB ports
tegra: fdt: Add clock bindings for Tegra2 Seaboard
tegra: fdt: Add clock bindings
tegra: fdt: Add additional USB binding
fdt: Add tegra-usb bindings file from linux
fdt: Add staging area for device tree binding documentation
tegra: fdt: Add device tree file for Tegra2 Seaboard from kernel
tegra: fdt: Add Tegra2x device tree file from kernel
arm: fdt: Add skeleton device tree file from kernel
fdt: Add basic support for decoding GPIO definitions
fdt: Add functions to access phandles, arrays and bools
fdt: Tidy up a few fdtdec problems
fdt: Add tests for fdtdec
fdt: Add fdtdec_find_aliases() to deal with alias nodes
arm: Tegra2: Fix ELDK42 gcc failure with inline asm stack pointer load
net: fec_mxc: allow use with cache enabled
net: force PKTALIGN to ARCH_DMA_MINALIGN
i.MX28: Enable caches by default
i.MX28: Make use of the bounce buffer
i.MX28: Do data transfers via DMA in MMC driver
MMC: Implement generic bounce buffer
i.MX28: Add cache support to MXS NAND driver
i.MX28: Add cache support into the APBH DMA driver
ARM926EJS: Implement cache operations
board/vpac270/onenand.c: Fix build errors
nhk8815: fix build errors
atmel-boards: add missing atmel_mci.h
ARM: highbank: setup env from boot source register
ARM: highbank: change env config to use nvram
ARM: highbank: add reset support
ARM: highbank: Add boot counter support
ARM: highbank: change TEXT_BASE to 0x8000
ARM: highbank: fix us_to_tick calculation
ARM: highbank: add missing get_tbclk
ARM: highbank: fix warning for calxedaxgmac_initialize
net: calxedaxgmac: fix build due to missing __aligned definition
EXYNOS: Add structure for Exynos4 DMC
EXYNOS: SMDK5250: Support all 4 UARTs
ARM: fix s3c2410 timer code
ARM: davinci: fixes for cam_enc_4xx board
omap3_spi: receive transmit mode
calimain, enbw_cmc: Fix typo in comments
Davinci: ea20: use gpio framework to access gpios
OMAP3: mt_ventoux: sets its own mtdparts
OMAP3: mt_ventoux: updated timing for FPGA
twl4030: fix potential power supply handling issues
NAND: TI: fix warnings in omap_gpmc.c
cam_enc_4xx: Rename 'images' to 'imgs'
arm: Add Prep subcommand support to bootm
OMAP3: twister: add support to boot Linux from SPL
SPL: call cleanup_before_linux() before booting Linux
OMAP3: SPL: do not call I2C init if no I2C is set.
Add cache functions to SPL for armv7
devkit8000: Implement and activate direct OS boot
omap/spl: change output of spl_parse_image_header
omap-common/spl: Add linux boot to SPL
devkit8000/spl: init GPMC for dm9000 in SPL
omap-common: Add NAND SPL linux booting
devkit8000: add config for spl command
Add cmd_spl command
mx53ard: Initialize return code with error
mx53: Make PLL2 to be the parent of UART clock
configs: imx: Use CONFIG_SF_DEFAULT_CS
mx28evk: Provide default values for SPI bus and chip select
USB: ehci-mx6: Add proper IO accessors
mx6: Read silicon revision from register
i.MX28: Drop __naked function from spl_mem_init
mxs_spi: Return proper timeout error
i.MX28: Make the stabilization delays shorter
pmic_i2c: Return error in case of invalid pmic_i2c_tx_num
mx6: Remove duplicate definition of ANATOP_BASE_ADDR
mx6: Fix reset cause for Power On Reset case
i.MX6: mx6qsabrelite: add MACH_TYPE_MX6Q_SABRELITE
i.MX6: mx6q_sabrelite: add CONFIG_REVISION_TAG
i.MX28: Enable additional DRAM address bits
mx6q: mx6qsabrelite: setup_spi() should be called in board_init to allow use for environment
mx31: add "ARM11P power gating" to get_reset_cause
mx31pdk: Fix CONFIG_SYS_MEMTEST_END
efikamx: Fix CONFIG_SYS_MEMTEST_END
mx53smd: Fix CONFIG_SYS_MEMTEST_END
mx53evk: Fix CONFIG_SYS_MEMTEST_END
mx51evk: Fix CONFIG_SYS_MEMTEST_END
i.MX6: mx6qsabrelite: add ext2 support
imximage: Remove overwriting of flash_offset
IXP: Fix GPIO_INT_ACT_LOW_SET()
IXP: Fix NAND build warning on PDNB3 and SCPU
IXP: Move PDNB3 and SCPU from Makefile to boards.cfg
IXP: Squash warnings in IXP NPE
IXP: Fix missing MACH_TYPE_{ACTUX?,PNB3,DVLHOST}
IXP: Make IXP buildable with arm-linux- toolchains
Examples: Properly append LDFLAGS to LD command
SPL: Enable YMODEM support on BeagleBone and AM335x EVM
SPL: Add YMODEM over UART load support
SPL: Add README.omap3
README: document more SPL config options
spl.c: Use __noreturn decorator
config.mk: Check for -fstack-usage support
config.mk: Make cc-option create a file under include/generated
...
Implementation of receive-transmit mode for
omap3 MCSPI.
Introduces full duplex communication, needed by
some spi devices (such as enc28j60).
Signed-off-by: jacopo mondi <mondi@cs.unibo.it> <j.mondi@voltaelectronics.com>
Instead of returning -1, it is preferred to return -ETIMEDOUT in case of timeouts.
Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Acked-by: Marek Vasut <marex@denx.de>
The module has 4 chip select signals. This patch supports it.
Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Signed-off-by: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
Move (E)CSPI register declarations into the imx-regs.h files for each supported CPU
Introduce two new macros to control conditional setup
MXC_CSPI - Used for processors with the Configurable Serial Peripheral Interface (MX3x)
MXC_ECSPI - For processors with Enhanced Configurable... (MX5x, MX6x)
Signed-off-by: Eric Nelson <eric.nelson@boundarydevices.com>
Acked-by: Dirk Behme <dirk.behme@de.bosch.com>
Acked-by: Stefano Babic <sbabic@denx.de>
Acked-by: Jason Liu <jason.hui@linaro.org>
Tested-by: Jason Liu <jason.hui@linaro.org>
Problem appears to have been present since day one but masked because alignment
aborts were not enabled. ca4b55800e "arm, arm926ejs: always do cpu critical
inits" turned on alignment aborts and uncovered this latent problem.
Signed-off-by: Ian Campbell <ijc@hellion.org.uk>
Acked-By: Jason Cooper <u-boot@lakedaemon.net>
Tested-By: Holger Brunck <holger.brunck@keymile.com>
Cc: Prafulla Wadaskar <prafulla@marvell.com>
Cc: Albert ARIBAUD <albert.u.boot@aribaud.net>
The generic spi flash driver (drivers/mtd/spi/spi_flash.c) uses the
spi low level driver's spi_xfer() function with len=0 to deassert the
SPI flash' chip select. But the i.MX28 spi driver rejects this call
due to len=0.
This patch implements an exception for len=0 with the SPI_XFER_END
flag set. This results in an extra read with the chip select being
deasserted afterwards. There seems to be no way to deassert the signal
by hand.
Signed-off-by: Matthias Fuchs <matthias.fuchs@esd.eu>
Tested-by: Fabio Estevam <fabio.estevam@freescale.com>
This allows a final, board specific, step in the claim/relase_bus
function for the SPI controller, which may be needed for some hardware
designs.
Signed-off-by: Valentin Longchamp <valentin.longchamp@keymile.com>
cc: Holger Brunck <holger.brunck@keymile.com>
cc: Prafulla Wadaskar <prafulla@marvell.com>
These two function nows ensure that the MPP is configured correctly for
the SPI controller before any SPI access, and restore the initial
configuration when the access is over.
Since the used pins for the SPI controller can differ (2 possibilities
for each signal), the used pins are configured with CONFIG_SYS_KW_SPI_MPP.
Signed-off-by: Valentin Longchamp <valentin.longchamp@keymile.com>
cc: Holger Brunck <holger.brunck@keymile.com>
cc: Prafulla Wadaskar <prafulla@marvell.com>
This was not done before, and in the case of a shared pin (for MPP0
between NF_IO[2] and CSn) this could lead to problems.
Signed-off-by: Valentin Longchamp <valentin.longchamp@keymile.com>
cc: Holger Brunck <holger.brunck@keymile.com>
cc: Prafulla Wadaskar <prafulla@marvell.com>
In anticipation of Tegra3 support, start removing/renaming
Tegra2-specific files. No functional changes (yet).
Also updated copyright to 2012.
Signed-off-by: Tom Warren <twarren@nvidia.com>
Simon Glass's proposal to fix this on Seaboard was NAK'd, so I
removed his NS16550 references and added a small delay before
SPI/UART muxing. Tested on my Seaboard with large SPI reads/writes
and saw no corruption (crc's matched) and no spurious comm chars.
Signed-off-by: Tom Warren <twarren@nvidia.com>
Acked-by: Simon Glass <sjg@chromium.org>
Tested-by: Jimmy Zhang <jimmzhang@nvidia.com>
Add the SPI / UART switch logic into the Tegra2 SPI driver so that it
can co-exist with the NS16550 UART.
We need the ns16550.h header for NS16550_t for now.
Signed-off-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Tom Warren <twarren@nvidia.com>
Fix:
atmel_spi.c: In function 'spi_xfer':
atmel_spi.c:139:7: warning: variable 'ret' set but not used
[-Wunused-but-set-variable]
Signed-off-by: Anatolij Gustschin <agust@denx.de>
* 'master' of git://git.denx.de/u-boot-arm:
ARM: Add Calxeda Highbank platform
dkb: make mmc command as default enabled
Marvell: dkb: add mmc support
ARM: pantheon: add mmc definition
davinci: remove config.mk file from the sources
ARM:AM33XX: Add support for TI AM335X EVM
ARM:AM33XX: Added timer support
ARM:AM33XX: Add emif/ddr support
ARM:AM33XX: Add clock definitions
ARM:AM33XX: Added support for AM33xx
omap3/emif4: fix registers definition
davinci: remove obsolete macro CONFIG_EMAC_MDIO_PHY_NUM
davinci: emac: add support for more than 1 PHYs
davinci: emac: add new features to autonegotiate for EMAC
da850evm: Move LPSC configuration to board_early_init_f()
omap4_panda: Build in cmd_gpio support on panda
omap: Don't use gpio_free to change direction to input
mmc: omap: Allow OMAP_HSMMC[23]_BASE to be unset
OMAP3: overo : Add environment variable optargs to bootargs
OMAP3: overo: Move ethernet CS4 configuration to execute based on board id
OMAP3: overo : Use ttyO2 instead of ttyS2.
da830: add support for NAND boot mode
dm36x: revert cache disable patch
dm644X: revert cache disable patch
devkit8000: Add malloc space
omap: spl: fix build break due to changes in FAT
OMAP3 SPL: Provide weak omap_rev_string
omap: beagle: Use ubifs instead of jffs2 for nand boot
omap: overo: Disable pull-ups on camera PCLK, HS and VS signals
omap: overo: Configure mux for gpio10
SPL: Add DMA library
omap3: Add interface for omap3 DMA
omap3: Add DMA register accessors
omap3: Add Base register for DMA
arm, davinci: add missing LSPC define for MMC/SD1
U-Boot/SPL: omap4: Make ddr pre-calculated timings as default.
DaVinci: correct MDSTAT.STATE mask
omap4: splitting padconfs into common, 4430 and 4460
omap4: adding revision detection for 4460 ES1.1
omap4: replacing OMAP4_CONTROL with OMAP4430_CONTROL
gplug: fixed build error as a result of code cleanup patch
kirkwood_spi: add dummy spi_init()
gpio: mvmfp: reduce include platform file
ARM: orion5x: reduce dependence of including platform file
serial: reduce include platform file for marvell chip
ARM: kirkwood: reduce dependence of including platform file
ARM: armada100: reduce dependence of including platform file
ARM: pantheon: reduce dependence of including platform file
Armada100: Add env storage support for Marvell gplugD
Armada100: Add SPI flash support for Marvell gplugD
Armada100: Add SPI support for Marvell gplugD
SPI: Add SPI driver support for Marvell Armada100
dreamplug: initial board support.
imx: fix coding style
misc: pmic: drop old Freescale's pmic driver
MX31: mx31pdk: use new pmic driver
MX31: mx31ads: use new pmic driver
MX31: mx31_litekit: use new pmic driver
MX5: mx53evk: use new pmic driver
MX5: mx51evk: use new pmic driver
MX35: mx35pdk: use new pmic driver
misc: pmic: addI2C support to pmic_fsl driver
misc: pmic: use I2C_SET_BUS in pmic I2C
MX5: efikamx/efikasb: use new pmic driver
MX3: qong: use new pmic driver
RTC: Switch mc13783 to generic pmic code
MX5: vision2: use new pmic driver
misc: pmic: Freescale PMIC switches to generic PMIC driver
misc:pmic:samsung Enable PMIC driver at GONI target
misc:pmic:max8998 MAX8998 support at a new PMIC driver.
misc:pmic:core New generic PMIC driver
mx31pdk: Remove unneeded config
mx31: provide readable WEIM CS accessor
MX51: vision2: Set global macros
I2C: Add i2c_get/set_speed() to mxc_i2c.c
ARM: Update mach-types
devkit8000: Add config to enable SPL MMC boot
devkit8000: protect board_mmc_init
arm, post: add missing post_time_ms for arm
cosmetic, post: Codingstyle cleanup
arm, logbuffer: make it compileclean
tegra2: Enable MMC for Seaboard
tegra2: Add more pinmux functions
tegra2: Rename PIN_ to PINGRP_
tegra2: Add more clock functions
tegra2: Clean up board code a little
tegra2: Rename CLOCK_PLL_ID to CLOCK_ID
kirkwood_spi.c:125:2: warning: format '%08X' expects type 'unsigned int', but
argument 4 has type 'const void *'
kirkwood_spi.c:125:2: warning: format '%08X' expects type 'unsigned int', but
argument 5 has type 'void *'
kirkwood_spi.c:160:5: warning: format '%08x' expects type 'unsigned int', but
argument 2 has type 'void *'
Signed-off-by: Marek Vasut <marek.vasut@gmail.com>
Cc: Wolfgang Denk <wd@denx.de>
Cc: Simon Glass <sjg@chromium.org>
Cc: Mike Frysinger <vapier@gentoo.org>
fsl_espi.c: In function 'spi_setup_slave':
fsl_espi.c💯 warning: format '%d' expects type 'int', but argument 3 has type
'long unsigned int'
fsl_espi.c: In function 'spi_xfer':
fsl_espi.c:237: warning: format '%08x' expects type 'unsigned int', but argument
5 has type 'const void *'
fsl_espi.c:237: warning: format '%08x' expects type 'unsigned int', but argument
7 has type 'void *'
Signed-off-by: Marek Vasut <marek.vasut@gmail.com>
Cc: Wolfgang Denk <wd@denx.de>
Cc: Simon Glass <sjg@chromium.org>
Cc: Mike Frysinger <vapier@gentoo.org>
For files like the drivers/serial/serial.c, it must include the
platform file, as the CONFIG_SYS_NS16550_COM1 must reference to the
definition in the platform definition files.
Include the platform definition file in the config file, so that it
would decouple the dependence for the driver files.
Signed-off-by: Lei Wen <leiwen@marvell.com>
IMX processors has a slightly different interface
to access GPIOs and do not make use of the provided GPIO
framework. The patch substitutes mxc_ specific
functions and make use of the API in asm/gpio.h
Signed-off-by: Stefano Babic <sbabic@denx.de>
andes_spi is an spi interface developed by Andes Tech.
Signed-off-by: Macpaul Lin <macpaul@andestech.com>
Cc: Wolfgang Denk <wd@denx.de>
Cc: Mike Frysinger <vapier@gentoo.org>
Acked-by: Mike Frysinger <vapier@gentoo.org>
The rework effort for ATMEL (AT91/AVR32) accidentially broke build of
this driver. Fix this to make it build again. However this driver should
be reworked as soon as possible!
Signed-off-by: Reinhard Meyer <u-boot@emk-elektronik.de>
Signed-off-by: Mingkai Hu <Mingkai.hu@freescale.com>
Singed-off-by: Jerry Huang <Chang-Ming.Huang@freescale.com>
Signed-off-by: Shaohui Xie <b21989@freescale.com>
Cc: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
As exception among the i.MX processors, the i.MX31 has headers
without general names (mx31-regs.h, mx31.h instead of imx-regs.h and
clock.h). This requires several nasty #ifdef in the drivers to
include the correct header. The patch cleans up the driver and
renames the header files as for the other i.MX processors.
Signed-off-by: Stefano Babic <sbabic@denx.de>
This patch adds CONFIG_SPI_IDLE_VAL to cf_spi.c
The default setting is 0x0 to behave same as current version, in case
CONFIG_SPI_MMC is set, the value is set to 0xFFFF (all ones). In either
case, the value can be overwritten by board configuration.
Signed-off-by: Wolfgang Wegner <w.wegner@astro-kom.de>
Signed-off-by: Andy Fleming <afleming@freescale.com>
Added this for mmc_spi driver. Though altera spi core does not
support programmable speed. It is fixed when configured in
sopc-builder.
Signed-off-by: Thomas Chou <thomas@wytron.com.tw>
Signed-off-by: Scott McNutt <smcnutt@psyent.com>
This patch cleans driver code replacing all accesses
to registers with fixed offsets with a corresponding
structure.
Signed-off-by: Stefano Babic <sbabic@denx.de>
The MXC SPI driver didn't calculate the SPI clock up to
now and just used highest possible divider 512 for DATA
RATE in the control register. This results in very low
transfer rates.
The patch adds code to calculate and setup the SPI clock
frequency for transfers.
Signed-off-by: Anatolij Gustschin <agust@denx.de>
Signed-off-by: Stefano Babic <sbabic@denx.de>
We need to shift only one time in each cycle in the swapping loop
for unaligned tx case. Currently two byte shift operations are
performed in each loop cycle causing zero gaps in the transmited
data, so not all data scheduled for transmition is actually
transmited.
The proper swapping in unaligned rx case is missing, so add it
as we need to put the received data into the rx buffer in the
correct byte order.
Signed-off-by: Anatolij Gustschin <agust@denx.de>
Tested-by: Stefano Babic <sbabic@denx.de>
CC: Ruslan N. Araslanov <byaaka@yandex.ru>
Signed-off-by: Ruslan Araslanov <ruslan.araslanov@vitecmm.com>
Signed-off-by: Sandeep Paulraj <s-paulraj@ti.com>
Before this commit, weak symbols were not overridden by non-weak symbols
found in archive libraries when linking with recent versions of
binutils. As stated in the System V ABI, "the link editor does not
extract archive members to resolve undefined weak symbols".
This commit changes all Makefiles to use partial linking (ld -r) instead
of creating library archives, which forces all symbols to participate in
linking, allowing non-weak symbols to override weak symbols as intended.
This approach is also used by Linux, from which the gmake function
cmd_link_o_target (defined in config.mk and used in all Makefiles) is
inspired.
The name of each former library archive is preserved except for
extensions which change from ".a" to ".o". This commit updates
references accordingly where needed, in particular in some linker
scripts.
This commit reveals board configurations that exclude some features but
include source files that depend these disabled features in the build,
resulting in undefined symbols. Known such cases include:
- disabling CMD_NET but not CMD_NFS;
- enabling CONFIG_OF_LIBFDT but not CONFIG_QE.
Signed-off-by: Sebastien Carlier <sebastien.carlier@gmail.com>
This moves the last piece from the old spi_flash driver to the new SPI
framework -- optional DMA RX support. This typically cuts speeds by ~40%
at the cost of additional ~300 bytes.
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
The actual SPI driver for i.MX31 and i.MX51 controller
use a wrong byte ordering, because it is supposed
to work only with Freescale's devices, as the Power
Controllers (PMIC). The driver is not suitable for
general purposes, because the buffers passed to spi_xfer
must be 32-bit aligned, as it is used mainly to send
integer to PMIC devices.
The patch drops any kind of limitation and makes the
driver useful with devices controlled sending commands
composed by single bytes (or by a odd number of bytes), such as
spi flash, sensor, etc.
Because the byte ordering is changed,
any current driver using this controller must be adapted, too.
Signed-off-by: Stefano Babic <sbabic@denx.de>
The handling of the SPI_CPOL bit inside the SPI
driver was wrong. As reported by the manual,
the meaning of the SSPOL inside the
configuration register is the same as reported
by SPI specification (0 if low in idle, 1 is high
on idle). The driver inverts this logic.
Because this patch sets the logic as specified, it is required
to clear the CPOL bit in the configuration file to adapt
to the correct logic.
Signed-off-by: Stefano Babic <sbabic@denx.de>
Signed-off-by: David Jander <david.jander@protonic.nl>
The patch adds support for setting gpios to the
MX51 processor and change name to the corresponding
functions for MX31. In this way, it is possible to get rid
of nasty #ifdef switches related to the processor type.
Signed-off-by: Stefano Babic <sbabic@denx.de>
Linux uses an offset of 8 to switch from hardware cs to a gpio cs,
so have u-boot use the same value. Also make sure it is public
for boards to access.
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Rather than only support the pins dedicated as chip selects, utilize the
gpio framework to support any gpio pin.
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Two Indentation fixes.
Catch requests for full-duplex transfers when driver configured for
half-duplex operation only.
Signed-off-by: Nick Thompson <nick.thompson@ge.com>
Signed-off-by: Sandeep Paulraj <s-paulraj@ti.com>
The following restructuring and optimisations increase the SPI
read performance from 1.3MiB/s (on da850) to 2.87MiB/s (on da830):
Remove continual revaluation of driver state from the core of the
copy loop. State can not change during the copy loop, so it is
possible to move these evaluations to before the copy loop.
Cost is more code space as loop variants are required for each set
of possible configurations. The loops are simpler however, so the
extra is only 128bytes on da830 with CONFIG_SPI_HALF_DUPLEX
defined.
Unrolling the first copy loop iteration allows the TX buffer to be
pre-loaded reducing SPI clock starvation.
Unrolling the last copy loop iteration removes testing for the
final loop iteration every time round the loop.
Using the RX buffer empty flag as a transfer throttle allows the
assumption that it is always safe to write to the TX buffer, so
polling of TX buffer full flag can be removed.
Signed-off-by: Nick Thompson <nick.thompson@ge.com>
Signed-off-by: Sandeep Paulraj <s-paulraj@ti.com>
I have updated this patch based on the comments [1] by Wolfgang Denk and
removed unused variables.
[1][http://lists.denx.de/pipermail/u-boot/2010-May/071728.html]
Reduce the number of reads per byte transferred on the BUF register from 2 to 1 and
take advantage of the TX buffer in the SPI module. On LogicPD OMAP-L138 EVM,
SPI read throughput goes up from ~0.8Mbyte/s to ~1.3Mbyte/s. Tested with a 2Mbyte image file.
Remove unused variables in the spi_xfer() function.
Signed-off-by: Delio Brignoli <dbrignoli@audioscience.com>
Tested-by: Ben Gardiner <bengardiner@nanometrics.ca>
Signed-off-by: Sandeep Paulraj <s-paulraj@ti.com>
This patch adds the driver of altera spi controller, which is
used as epcs/spi flash controller. It also works with mmc_spi
driver.
This driver support more than one spi bus, with base list declared
#define CONFIG_SYS_ALTERA_SPI_LIST { BASE_0,BASE_1,... }
Signed-off-by: Thomas Chou <thomas@wytron.com.tw>
Tested-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Scott McNutt <smcnutt@psyent.com>
As discussed on the list, move "arch/ppc" to "arch/powerpc" to
better match the Linux directory structure.
Please note that this patch also changes the "ppc" target in
MAKEALL to "powerpc" to match this new infrastructure. But "ppc"
is kept as an alias for now, to not break compatibility with
scripts using this name.
Signed-off-by: Stefan Roese <sr@denx.de>
Acked-by: Wolfgang Denk <wd@denx.de>
Acked-by: Detlev Zundel <dzu@denx.de>
Acked-by: Kim Phillips <kim.phillips@freescale.com>
Cc: Peter Tyser <ptyser@xes-inc.com>
Cc: Anatolij Gustschin <agust@denx.de>
* add's a warning to all files, which need update to new SoC access
* convert common files in cpu/../at91 and a lot of drivers to use
c stucture SoC access
Signed-off-by: Jens Scharsig <js_at_ng@scharsoft.de>
Commit f9b6a1575d, "i.MX31: fix SPI
driver for shorter than 32 bit" broke 32 bit transfers. This patch
makes single 32 bit transfer work again.
Transfer lengths that are known not to work will abort and print
an error message.
Tested on i.MX31 Litekit and i.MX31 PDK using 32 bit transfers to
the MC13783/ATLAS chip (using the 'date' command).
Signed-off-by: Magnus Lilja <lilja.magnus@gmail.com>
This adds a driver for the SPI controller found on davinci
based SoCs from Texas Instruments.
Signed-off-by: Sekhar Nori <nsekhar@ti.com>
Signed-off-by: Sudhakar Rajashekhara <sudhakar.raj@ti.com>
Signed-off-by: Sandeep Paulraj <s-paulraj@ti.com>
If the requested clock cannot be exactly obtained, round it up so that we
err on the side of slightly slower rather than slightly faster.
Signed-off-by: Cliff Cai <cliff.cai@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Some SPI devices like to see high idle values rather than low.
Signed-off-by: Cliff Cai <cliff.cai@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Blackfin SPI driver was not driving the SPI chip-select high before
putting the chip-select signals into tri-state mode. This is probably
something that slipped by unnoticed in most designs. If the signals are
put directly into a tri-state mode, then the board is relying on the
pull-up resistors to pull up the chip-select before the next transaction.
Most of the time this is fine, except when you have two transactions that
follow each other very closely, such as the flash erase and read status
register commands. In this case I was seeing a 500ns separation between
the transactions. In my setup, with a 10kOhm pull-up, it would meet
timing spec about half the time and resulted in intermittent errors. (A
stronger pull up would fix this, but our design is targeted for low power
consumption and a 3.3kOhm @ 3.3v is 3.3mW of needless power consumption.)
I modified the spi_cs_deactivate() function in bfin_spi.c to drive the
chip-selects high before putting them into tri-state. For me, this
resulted in a rise time of 5ns instead of the previous rise time of about
1us, and fully satisfied the timing spec of the chip.
Signed-off-by: Todor I Mollov <tmollov@ucsd.edu>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Since the PORTJ on the BF537 is peripheral-only (no GPIO functionality),
then there is no PORTJ_FER register for us to worry about.
Signed-off-by: Sonic Zhang <Sonic.Zhang@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Some SPI devices have special requirements on chip-select handling.
With this patch we can use a GPIO as a chip-select and strictly follow
the SPI_XFER_BEGIN and SPI_XFER_END flags.
Signed-off-by: Guennadi Liakhovetski <lg@denx.de>
Acked-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Fix setting the SPI Control register, 8 and 16-bit transfers
and a wrong pointer in the free routine in the mxc_spi driver.
Signed-off-by: Guennadi Liakhovetski <lg@denx.de>
Acked-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
This adds a driver for the SPI controller found on most AT91 and AVR32
chips, implementing the new SPI API.
Changed in v4:
- Update to new API
- Handle zero-length transfers appropriately. The user may send a
zero-length SPI transfer with SPI_XFER_END set in order to
deactivate the chip select after a series of transfers with chip
select active. This is useful e.g. when polling the status
register of DataFlash.
Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com>
This patch gets rid of the spi_chipsel table and adds a handful of new
functions that makes the SPI layer cleaner and more flexible.
Instead of the spi_chipsel table, each board that wants to use SPI
gets to implement three hooks:
* spi_cs_activate(): Activates the chipselect for a given slave
* spi_cs_deactivate(): Deactivates the chipselect for a given slave
* spi_cs_is_valid(): Determines if the given bus/chipselect
combination can be activated.
Not all drivers may need those extra functions however. If that's the
case, the board code may just leave them out (assuming they know what
the driver needs) or rely on the linker to strip them out (assuming
--gc-sections is being used.)
To set up communication parameters for a given slave, the driver needs
to call spi_setup_slave(). This returns a pointer to an opaque
spi_slave struct which must be passed as a parameter to subsequent SPI
calls. This struct can be freed by calling spi_free_slave(), but most
driver probably don't want to do this.
Before starting one or more SPI transfers, the driver must call
spi_claim_bus() to gain exclusive access to the SPI bus and initialize
the hardware. When all transfers are done, the driver must call
spi_release_bus() to make the bus available to others, and possibly
shut down the SPI controller hardware.
spi_xfer() behaves mostly the same as before, but it now takes a
spi_slave parameter instead of a spi_chipsel function pointer. It also
got a new parameter, flags, which is used to specify chip select
behaviour. This may be extended with other flags in the future.
This patch has been build-tested on all powerpc and arm boards
involved. I have not tested NIOS since I don't have a toolchain for it
installed, so I expect some breakage there even though I've tried
fixing up everything I could find by visual inspection.
I have run-time tested this on AVR32 ATNGW100 using the atmel_spi and
DataFlash drivers posted as a follow-up. I'd like some help testing
other boards that use the existing SPI API.
But most of all, I'd like some comments on the new API. Is this stuff
usable for everyone? If not, why?
Changed in v4:
- Build fixes for various boards, drivers and commands
- Provide common struct spi_slave definition that can be extended by
drivers
- Pass a struct spi_slave * to spi_cs_activate and spi_cs_deactivate
- Make default bus and mode build-time configurable
- Override default SPI bus ID and mode on mx32ads and imx31_litekit.
Changed in v3:
- Add opaque struct spi_slave for controller-specific data associated
with a slave.
- Add spi_claim_bus() and spi_release_bus()
- Add spi_free_slave()
- spi_setup() is now called spi_setup_slave() and returns a
struct spi_slave
- soft_spi now supports four SPI modes (CPOL|CPHA)
- Add bus parameter to spi_setup_slave()
- Convert the new i.MX32 SPI driver
- Convert the new MC13783 RTC driver
Changed in v2:
- Convert the mpc8xxx_spi driver and the mpc8349emds board to the
new API.
Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com>
Tested-by: Guennadi Liakhovetski <lg@denx.de>
This commit gets rid of a huge amount of silly white-space issues.
Especially, all sequences of SPACEs followed by TAB characters get
removed (unless they appear in print statements).
Also remove all embedded "vim:" and "vi:" statements which hide
indentation problems.
Signed-off-by: Wolfgang Denk <wd@denx.de>
This is an SPI driver for i.MX and MXC based SoCs from Freescale. So far
only implemented and tested on i.MX31, can with a modified register layout
and definitions be used for i.MX27, I think, MXC CPUs have similar SPI
controllers too.
Signed-off-by: Guennadi Liakhovetski <lg@denx.de>
This driver should only compile if CONFIG_MPC8XXX_SPI is set
Signed-off-by: Ben Warren <biggerbadderben@gmail.com>
Signed-off-by: Kim Phillips <kim.phillips@freescale.com>
This patch adds support for the SPI controller found on Freescale PowerPC
processors such as the MCP834x family. Additionally, a new config option,
CONFIG_HARD_SPI, is added for general purpose SPI controller use.
Signed-off-by: Ben Warren <biggerbadderben@gmail.com>
Signed-off-by: Kim Phillips <kim.phillips@freescale.com>
