This patch adds a new SPI driver to support the Altera SOPC Builder
SPI component. It uses the bitbanging library.
Signed-off-by: Thomas Chou <thomas@wytron.com.tw>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
This patch enables the existing S3C64XX series SPI driver for S5P64X0
and removed dependency on EXPERIMENTAL because we don't need it now.
v3: Changed dependency of S3C64XX_DMA
v2: Removed dependency on EXPERIMENTAL
Signed-off-by: Abhilash Kesavan <a.kesavan@samsung.com>
Signed-off-by: Sangbeom Kim <sbkim73@samsung.com>
Acked-by: Jassi Brar <jassi.brar@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
* 'spi' of git://git.linutronix.de/users/bigeasy/soda into spi/next
spi/pxa2xx: register driver properly
spi/pxa2xx: add support for shared IRQ handler
spi/pxa2xx: Use define for SSSR_TFL_MASK instead of plain numbers
arm/pxa2xx: reorgazine SSP and SPI header files
spi/pxa2xx: Add CE4100 support
spi/pxa2xx: Consider CE4100's FIFO depth
spi/pxa2xx: Add chipselect support for Sodaville
spi/pxa2xx: Modify RX-Tresh instead of busy-loop for the remaining RX bytes.
spi/pxa2xx: pass of_node to spi device and set a parent device
* 'for-grant' of git://arago-project.org/git/projects/linux-davinci into spi/next
spi: davinci: fix checkpatch errors
spi: davinci: whitespace cleanup
spi: davinci: remove unused variable 'pdata'
spi: davinci: set chip-select mode in SPIDEF only once
spi: davinci: enable both activation and deactivation of chip-selects
spi: davinci: remove unnecessary data transmit on CS disable
spi: davinci: enable GPIO lines to be used as chip selects
spi: davinci: simplify prescalar calculation
spi: davinci: remove 'wait_enable' platform data member
spi: davinci: make chip-slect specific parameters really chip-select specific
spi: davinci: consolidate setup of SPIFMTn in one function
spi: davinci: setup chip-select timers values only if timer enabled
spi: davinci: add support for wait enable timeouts
spi: davinci: remove unused members of davinci_spi_slave
spi: davinci: eliminate the single member structure davinci_spi_slave
spi: davinci: eliminate unnecessary update of davinci_spi->count
spi: davinci: simplify calculation of edma acount value
spi: davinci: check for NULL buffer pointer before using it
spi: davinci: remove unnecessary disable of SPI
spi: davinci: remove unnecessary 'count' variable in driver private data
spi: davinci: remove unnecessary completion variable initialization
spi: davinci: remove non-useful interrupt mode support
spi: davinci: simplify poll mode transfers
spi: davinci: add support for interrupt mode
spi: davinci: configure the invariable bits in spipc0 only once
spi: davinci: remove unnecessary function davinci_spi_bufs_prep()
spi: davinci: remove unnecessary call to davinci_spi_setup_transfer()
spi: davinci: do not store DMA channel information per chip select
spi: davinci: always start transmit DMA
spi: davinci: do not use temporary buffer if no transmit data provided
spi: davinci: always start receive DMA
spi: davinci: use edma_write_slot() to setup EDMA PaRAM slot
spi: davinci: fix DMA event generation stoppage
spi: davinci: fix EDMA CC errors at end of transfers
spi: davinci: handle DMA completion errors correctly
spi: davinci: remove usage of additional completion variables for DMA
spi: davinci: let DMA operation be specified on per-device basis
spi: davinci: remove non-useful "clk_internal" platform data
spi: davinci: enable and power-up SPI only when required
spi: davinci: setup the driver owner
spi: davinci: add additional comments
spi: davinci: add EF Johnson Technologies copyright
spi: davinci: removed unused #defines
spi: davinci: remove unnecessary typecast
spi: davinci: do not treat Tx interrupt being set as error
spi: davinci: do not allocate DMA channels during SPI device setup
spi: davinci: remove unnecessary private data member 'region_size'
spi: davinci: shorten variable names
spi: davinci: kconfig: add manufacturer name to prompt string
dw_spi driver in upstream only supports PIO mode, and this patch
will support it to cowork with the Designware dma controller used
on Intel Moorestown platform, at the same time it provides a general
framework to support dw_spi core to cowork with dma controllers on
other platforms
It has been tested with a Option GTM501L 3G modem and Infenion 60x60
modem. To use DMA mode, DMA controller 2 of Moorestown has to be enabled
Also change the dma interface suggested by Linus Walleij.
Acked-by: Linus Walleij <linus.walleij@stericsson.com>
Signed-off-by: Feng Tang <feng.tang@intel.com>
[Typo fix and renames to match intel_mid_dma renaming]
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Sodaville's SPI controller is very much the same as in PXA25x. The
difference:
- The RX/TX FIFO is only 4 words deep instead of 16
- No DMA support
- The SPI controller offers a CS functionality
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Dirk Brandewie <dirk.brandewie@gmail.com>
Add manufacturer name to the Kconfig prompt string and move
the controller name to the begining of the prompt.
This helps locate the driver easily among the list of existing
drivers.
While at it, also add information about being able to build
the driver as module.
Tested-By: Brian Niebuhr <bniebuhr@efjohnson.com>
Signed-off-by: Sekhar Nori <nsekhar@ti.com>
Now that the of_platform_bus_type has been merged with the platform
bus type, a single platform driver can handle both OF and non-OF use
cases. This patch merges the OF support into the platform driver.
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Tested-by: Michal Simek <monstr@monstr.eu>
This patch merges the platform driver support into the main body of
xilinx_spi.c in preparation for merging the OF and non-OF support
code.
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Tested-by: Michal Simek <monstr@monstr.eu>
v2 changes:
from Thierry Reding:
* add "select TEGRA_SYSTEM_DMA" to Kconfig
from Grant Likely:
* add oneline description to header
* inline references to DRIVER_NAME
* inline references to BUSY_TIMEOUT
* open coded bytes_per_word()
* spi_readl/writel -> spi_tegra_readl/writel
* move transfer validation to spi_tegra_transfer
* don't request_mem_region iomem as platform bus does that for us
* __exit -> __devexit
v3 changes:
from Russell King:
* put request_mem_region back int
from Grant Likely:
* remove #undef DEBUG
* add SLINK_ to register bit defines
* remove unused bytes_per_word
* make spi_tegra_readl/writel static linine
* various refactoring for clarity
* mark err if BSY bit is not cleared after 1000 retries
* move spinlock to protect setting of RDY bit
* subsys_initcall -> module_init
v3 changes:
from Grant Likely:
* update spi_tegra to use PTR_ERRless dma API
v4 changes:
from Grant Likely:
* remove empty spi_tegra_cleanup fucntion
* allow device ids of -1
Signed-off-by: Erik Gilling <konkers@android.com>
Acked-by: Grant Likely <grant.likely@secretlab.ca>
Cc: Thierry Reding <thierry.reding@avionic-design.de>
Cc: Russell King <linux@arm.linux.org.uk>
spi: tegra: cleanups from upstream review
Change-Id: Icecf7e64efcb39de072a15234ba1faa4bad40d25
Signed-off-by: Erik Gilling <konkers@android.com>
* 'devel' of master.kernel.org:/home/rmk/linux-2.6-arm: (278 commits)
arm: remove machine_desc.io_pg_offst and .phys_io
arm: use addruart macro to establish debug mappings
arm: return both physical and virtual addresses from addruart
arm/debug: consolidate addruart macros for CONFIG_DEBUG_ICEDCC
ARM: make struct machine_desc definition coherent with its comment
eukrea_mbimxsd-baseboard: Pass the correct GPIO to gpio_free
cpuimx27: fix compile when ULPI is selected
mach-pcm037_eet: fix compile errors
Fixing ethernet driver compilation error for i.MX31 ADS board
cpuimx51: update board support
mx5: add cpuimx51sd module and its baseboard
iomux-mx51: fix GPIO_1_xx 's IOMUX configuration
imx-esdhc: update devices registration
mx51: add resources for SD/MMC on i.MX51
iomux-mx51: fix SD1 and SD2's iomux configuration
clock-mx51: rename CLOCK1 to CLOCK_CCGR for better readability
clock-mx51: factorize clk_set_parent and clk_get_rate
eukrea_mbimxsd: add support for DVI displays
cpuimx25 & cpuimx35: fix OTG port registration in host mode
i.MX31 and i.MX35 : fix errate TLSbo65953 and ENGcm09472
...
Add eSPI controller support based on the library code spi_fsl_lib.c.
The eSPI controller is newer controller 85xx/Pxxx devices supported.
There're some differences comparing to the SPI controller:
1. Has different register map and different bit definition
So leave the code operated the register to the driver code, not
the common code.
2. Support 4 dedicated chip selects
The software can't controll the chip selects directly, The SPCOM[CS]
field is used to select which chip selects is used, and the
SPCOM[TRANLEN] field is set to tell the controller how long the CS
signal need to be asserted. So the driver doesn't need the chipselect
related function when transfering data, just set corresponding register
fields to controll the chipseclect.
3. Different Transmit/Receive FIFO access register behavior
For SPI controller, the Tx/Rx FIFO access register can hold only
one character regardless of the character length, but for eSPI
controller, the register can hold 4 or 2 characters according to
the character lengths. Access the Tx/Rx FIFO access register of the
eSPI controller will shift out/in 4/2 characters one time. For SPI
subsystem, the command and data are put into different transfers, so
we need to combine all the transfers to one transfer in order to pass
the transfer to eSPI controller.
4. The max transaction length limitation
The max transaction length one time is limitted by the SPCOM[TRANSLEN]
field which is 0xFFFF. When used mkfs.ext2 command to create ext2
filesystem on the flash, the read length will exceed the max value of
the SPCOM[TRANSLEN] field.
Signed-off-by: Mingkai Hu <Mingkai.hu@freescale.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Refactor the common code in file spi_fsl_spi.c to spi_fsl_lib.c used
by SPI/eSPI controller driver as a library, and leave the QE/CPM SPI
controller code in the SPI controller driver spi_fsl_spi.c.
Because the register map of the SPI controller and eSPI controller
is so different, also leave the code operated the register to the
driver code, not the common code.
Signed-off-by: Mingkai Hu <Mingkai.hu@freescale.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
This will pave the way to refactor out the common code which can be used
by the eSPI controller driver, and rename the SPI controller dirver to the
file spi_fsl_spi.c.
Signed-off-by: Mingkai Hu <Mingkai.hu@freescale.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Topcliff PCH is the platform controller hub that is going to be used
in Intel's upcoming general embedded platform. All IO peripherals in
Topcliff PCH are actually devices sitting on AMBA bus. This patch
adds a driver for the SPI bus integrated into the Topcliff device.
Signed-off-by: Masayuki Ohtake <masa-korg@dsn.okisemi.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
i.MX51 comes with two eCSPI interfaces (that are quite different from
what was known before---the tried and tested Freescale way) and a CSPI
interface that is identical to the devices found on i.MX25 and i.MX35.
This patch is a merge of two very similar patches (by Jason Wang and Sascha
Hauer resp.) plus a (now hopefully correct) reimplementation of the
clock calculation.
Acked-by: Jason Wang <jason77.wang@gmail.com>
Acked-by: Grant Likely <grant.likely@secretlab.ca>
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
This has the advantage not to need to much cpu_is_... macros. Still more
when imx51 support is added which has two different spi interfaces which
would introduce additional checks on the device id.
With this setup it's not possible for the compiler anymore to detect the
unused functions, so four additional kconfig symbols are introduced to
ifdef out the unneeded functions in the callback array and all these
functions are marked with __maybe_unused to suppress the corresponding
gcc warnings.
Comparing the driver footprint with and without the patch for a mx27
kernel yields:
add/remove: 2/0 grow/shrink: 2/0 up/down: 280/0 (280)
function old new delta
spi_imx_devtype - 192 +192
spi_imx_probe 980 1032 +52
spi_imx_devtype_data - 32 +32
spi_imx_setupxfer 276 280 +4
Later when the platform code is updated to use the platform ids, the
autodetection can be removed which will make the driver a bit smaller
again. (~60 Bytes in my test.)
Acked-by: Jason Wang <jason77.wang@gmail.com>
Acked-by: Grant Likely <grant.likely@secretlab.ca>
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Thomas Chou
Gabor Juhos
Abhilash Kesavan
Yong Shen
Grant Likely
Feng Tang
Sebastian Andrzej Siewior
Sekhar Nori
Erik Gilling
Linus Torvalds
Mingkai Hu
Masayuki Ohtake
Uwe Kleine-König
Anatolij Gustschin
Mika Westerberg