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>
Change all code that conditionally operates on high bat
registers (that is, BATs 4-7) to look at CONFIG_HIGH_BATS
instead of the myriad ways this is done now. Define the option
for every config for which high bats are supported (and
enabled by early boot, on parts where they're not always
enabled)
Signed-off-by: Becky Bruce <becky.bruce@freescale.com>
This cleans up the SDRAM initialization and related code a bit, and
allows faster booting.
* Add definitions for EBI and internal SRAM to asm/arch/memory-map.h
* Remove memory test from sdram_init() and make caller responsible
for verifying the SDRAM and determining its size.
* Remove base_address member from struct sdram_config (was sdram_info)
* Add data_bits member to struct sdram_config and kill CFG_SDRAM_16BIT
* Add support for a common STK1000 hack: 16MB SDRAM instead of 8.
Signed-off-by: Haavard Skinnemoen <haavard.skinnemoen@atmel.com>
This is a replacement for ATSTK1002 with 64MB SDRAM and NAND flash on
board. It's currently in production and will be available soon.
Signed-off-by: Haavard Skinnemoen <haavard.skinnemoen@atmel.com>
Make STK1002 and NGW100 boards act more alike:
- STK boards can use as many arguments as NGW
- STK boards don't need to manage FPGAs either
- NGW commands should match STK ones
Also spell U-Boot right in prompts for STK1002 and NGW100.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
[haavard.skinnemoen@atmel.com: update STK100[34] as well]
Signed-off-by: Haavard Skinnemoen <haavard.skinnemoen@atmel.com>
Add new configuration variable CONFIG_PCI_OHCI_DEVNO.
In case of several PCI USB controllers on a board this variable
specifys which controller to use.
Also add USB support for sokrates board.
See doc/README.generic_usb_ohci for details.
Signed-off-by: Sergei Poselenov <sposelenov@emcraft.com>
Signed-off-by: Markus Klotzbuecher <mk@denx.de>
Add DIU and cfb console support to FSL 5121ADS board.
Use #define CONFIG_VIDEO in config file to enable fb console.
Signed-off-by: York Sun <yorksun@freescale.com>
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>
Change LCRR clock ratio from 2 to 4 to commodate VSC7385.
Correct TSEC1 vs TSEC2 assignment.
Define ETHADDR and ETH1ADDR always.
Signed-off-by: York Sun <yorksun@freescale.com>
Signed-off-by: Timur Tabi <timur@freescale.com>
CONFIG_ENV_OVERWRITE is commented out in the config header files,
so let's cleanup the files by removing the whole definition.
Signed-off-by: Stelian Pop <stelian@popies.net>
Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
This patch makes the necessary adaptations (PIO configurations and
defines in config header file) to hook up the Atmel LCD driver to the
AT91SAM9RLEK board.
Signed-off-by: Stelian Pop <stelian@popies.net>
Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
This patch makes the necessary adaptations (PIO configurations and
defines in config header file) to hook up the Atmel LCD driver to the
AT91SAM9263EK board.
Signed-off-by: Stelian Pop <stelian@popies.net>
Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
This patch makes the necessary adaptations (PIO configurations and
defines in config header file) to hook up the Atmel LCD driver to the
AT91SAM9261EK board.
Signed-off-by: Stelian Pop <stelian@popies.net>
Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
This patch makes the necessary adaptations (PIO configurations and
defines in config header file) to hook up the Atmel LCD driver to the
AT91CAP9ADK board.
Signed-off-by: Stelian Pop <stelian@popies.net>
Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
This patch adds support for the AT91SAM9RL chip and the AT91SAM9RLEK
board.
Signed-off-by: Stelian Pop <stelian@popies.net>
Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
This patch adds support for the AT91SAM9263 chip and the AT91SAM9263EK
board.
Signed-off-by: Stelian Pop <stelian@popies.net>
Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
This patch adds support for the AT91SAM9261 chip and the AT91SAM9261EK
board.
Signed-off-by: Stelian Pop <stelian@popies.net>
Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
This patch fixes the dataflash offsets used in CONFIG_BOOTCOMMAND
in order to cope with the changes in DataFlash partitionning scheme
(cset c3a60cb3).
Signed-off-by: Stelian Pop <stelian@popies.net>
Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
This patch adapts CONFIG_BOOTARGS to the chosen boot method (boot from
DataFlash or from NAND), and gives to Linux a fully specified mtdparts
variable.
Signed-off-by: Stelian Pop <stelian@popies.net>
Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
This patch changes the SPI timings to closely match the ones
used by the Linux kernel and the Atmel's own bootstrap project.
Signed-off-by: Stelian Pop <stelian@popies.net>
Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
The Atmel boards can handle 8 or 16 bit NAND memories. This patch
makes the support configurable in the board config header file
(CFG_NAND_DBW_8 or CFG_NAND_DBW_16).
Signed-off-by: Stelian Pop <stelian@popies.net>
Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
This patch fixes the dataflash offsets used in CONFIG_BOOTCOMMAND
in order to cope with the changes in DataFlash partitionning scheme
(cset c3a60cb3).
Signed-off-by: Stelian Pop <stelian@popies.net>
Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
This patch adapts CONFIG_BOOTARGS to the chosen boot method (boot from
DataFlash or from NAND), and gives to Linux a fully specified mtdparts
variable.
Signed-off-by: Stelian Pop <stelian@popies.net>
Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
This patch changes the SPI timings to closely match the ones
used by the Linux kernel and the Atmel's own bootstrap project.
Signed-off-by: Stelian Pop <stelian@popies.net>
Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
The Atmel boards can handle 8 or 16 bit NAND memories. This patch
makes the support configurable in the board config header file
(CFG_NAND_DBW_8 or CFG_NAND_DBW_16).
Signed-off-by: Stelian Pop <stelian@popies.net>
Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
When using dhcp/bootp the "netmask" environment variable is not set
because CONFIG_BOOTP_SUBNETMASK is not defined. But usually this is
desireable, so the following patch adds this this option to the board
config.
Signed-off-by: Markus Klotzbuecher <mk@denx.de>
Signed-off-by: Stefan Roese <sr@denx.de>
This patch reworks the default environment on Makalu. Now "net_nfs" for
example uses the device-tree style booting formerly know as "net_nfs_fdt".
Also the addresses in RAM were changed because of the new image booting
support, which check for image overwriting. So the addresses needed to
get adjusted.
Signed-off-by: Stefan Roese <sr@denx.de>
When applying the AT91CAP9 patches upstream, something transformed
the '@' character into the ' <at> ' sequence.
The patch below restores the original form in all the places where
it has been modified (the AT91CAP9 files, the AT91SAM9260 files which
were copied from AT91CAP9, and a couple of other files where the
' <at> ' sequence was present).
Signed-off-by: Stelian Pop <stelian@popies.net>
According to schematics and to RedBoot sources, the MX31ADS uses a 32768Hz
oscillator as a SKIL source. Fix previously wrongly assumed 32000Hz value.
Also fix a typo when verifying a jumper configuration. While at it, make
two needlessly global functions static.
Signed-off-by: Guennadi Liakhovetski <lg@denx.de>
When applying the AT91CAP9 patches upstream, something transformed
the '@' character into the ' <at> ' sequence.
The patch below restores the original form in all the places where
it has been modified (the AT91CAP9 files, the AT91SAM9260 files which
were copied from AT91CAP9, and a couple of other files where the
' <at> ' sequence was present).
Signed-off-by: Stelian Pop <stelian@popies.net>
Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
