f8043872e7
The BCM2835 contains two forms of SPI master controller (one known simply as SPI0, and the other known as the "Universal SPI Master", in the auxilliary block) and one form of SPI slave controller. This patch adds support for the SPI0 controller. This driver is taken from Chris Boot's repository at git://github.com/bootc/linux.git rpi-linear as of commit 6de2905 "spi-bcm2708: fix printf with spurious %s". In the first SPI-related commit there, Chris wrote: Thanks to csoutreach / A Robinson for his driver which I used as an inspiration. You can find his version here: http://piface.openlx.org.uk/raspberry-pi-spi-kernel-driver-available-for Changes made during upstreaming: * Renamed bcm2708 to bcm2835 as per upstream naming for this SoC. * Removed support for brcm,realtime property. * Increased transfer timeout to 30 seconds. * Return IRQ_NONE from the IRQ handler if no interrupt was handled. * Disable TA (Transfer Active) and clear FIFOs on a transfer timeout. * Wrote device tree binding documentation. * Request unnamed clock rather than "sys_pclk"; the DT will provide the correct clock. * Assume that tfr->speed_hz and tfr->bits_per_word are always set in bcm2835_spi_start_transfer(), bcm2835_spi_transfer_one(), so no need to check spi->speed_hz or tft->bits_per_word. * Re-ordered probe() to remove the need for temporary variables. * Call clk_disable_unprepare() rather than just clk_unprepare() on probe() failure. * Don't use devm_request_irq(), to ensure that the IRQ doesn't fire after we've torn down the device, but not unhooked the IRQ. * Moved probe()'s call to clk_prepare_enable() so we can be sure the clock is enabled if the IRQ handler fires immediately. * Remove redundant checks from bcm2835_spi_check_transfer() and bcm2835_spi_setup(). * Re-ordered IRQ handler to check for RXR before DONE. Added comments to ISR. * Removed empty prepare/unprepare implementations. * Removed use of devinit/devexit. * Added BCM2835_ prefix to defines. Signed-off-by: Chris Boot <bootc@bootc.net> Signed-off-by: Stephen Warren <swarren@wwwdotorg.org> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
526 lines
15 KiB
Text
526 lines
15 KiB
Text
#
|
|
# SPI driver configuration
|
|
#
|
|
# NOTE: the reason this doesn't show SPI slave support is mostly that
|
|
# nobody's needed a slave side API yet. The master-role API is not
|
|
# fully appropriate there, so it'd need some thought to do well.
|
|
#
|
|
menuconfig SPI
|
|
bool "SPI support"
|
|
depends on HAS_IOMEM
|
|
help
|
|
The "Serial Peripheral Interface" is a low level synchronous
|
|
protocol. Chips that support SPI can have data transfer rates
|
|
up to several tens of Mbit/sec. Chips are addressed with a
|
|
controller and a chipselect. Most SPI slaves don't support
|
|
dynamic device discovery; some are even write-only or read-only.
|
|
|
|
SPI is widely used by microcontrollers to talk with sensors,
|
|
eeprom and flash memory, codecs and various other controller
|
|
chips, analog to digital (and d-to-a) converters, and more.
|
|
MMC and SD cards can be accessed using SPI protocol; and for
|
|
DataFlash cards used in MMC sockets, SPI must always be used.
|
|
|
|
SPI is one of a family of similar protocols using a four wire
|
|
interface (select, clock, data in, data out) including Microwire
|
|
(half duplex), SSP, SSI, and PSP. This driver framework should
|
|
work with most such devices and controllers.
|
|
|
|
if SPI
|
|
|
|
config SPI_DEBUG
|
|
boolean "Debug support for SPI drivers"
|
|
depends on DEBUG_KERNEL
|
|
help
|
|
Say "yes" to enable debug messaging (like dev_dbg and pr_debug),
|
|
sysfs, and debugfs support in SPI controller and protocol drivers.
|
|
|
|
#
|
|
# MASTER side ... talking to discrete SPI slave chips including microcontrollers
|
|
#
|
|
|
|
config SPI_MASTER
|
|
# boolean "SPI Master Support"
|
|
boolean
|
|
default SPI
|
|
help
|
|
If your system has an master-capable SPI controller (which
|
|
provides the clock and chipselect), you can enable that
|
|
controller and the protocol drivers for the SPI slave chips
|
|
that are connected.
|
|
|
|
if SPI_MASTER
|
|
|
|
comment "SPI Master Controller Drivers"
|
|
|
|
config SPI_ALTERA
|
|
tristate "Altera SPI Controller"
|
|
select SPI_BITBANG
|
|
help
|
|
This is the driver for the Altera SPI Controller.
|
|
|
|
config SPI_ATH79
|
|
tristate "Atheros AR71XX/AR724X/AR913X SPI controller driver"
|
|
depends on ATH79 && GENERIC_GPIO
|
|
select SPI_BITBANG
|
|
help
|
|
This enables support for the SPI controller present on the
|
|
Atheros AR71XX/AR724X/AR913X SoCs.
|
|
|
|
config SPI_ATMEL
|
|
tristate "Atmel SPI Controller"
|
|
depends on (ARCH_AT91 || AVR32)
|
|
help
|
|
This selects a driver for the Atmel SPI Controller, present on
|
|
many AT32 (AVR32) and AT91 (ARM) chips.
|
|
|
|
config SPI_BCM2835
|
|
tristate "BCM2835 SPI controller"
|
|
depends on ARCH_BCM2835
|
|
help
|
|
This selects a driver for the Broadcom BCM2835 SPI master.
|
|
|
|
The BCM2835 contains two types of SPI master controller; the
|
|
"universal SPI master", and the regular SPI controller. This driver
|
|
is for the regular SPI controller. Slave mode operation is not also
|
|
not supported.
|
|
|
|
config SPI_BFIN5XX
|
|
tristate "SPI controller driver for ADI Blackfin5xx"
|
|
depends on BLACKFIN
|
|
help
|
|
This is the SPI controller master driver for Blackfin 5xx processor.
|
|
|
|
config SPI_BFIN_SPORT
|
|
tristate "SPI bus via Blackfin SPORT"
|
|
depends on BLACKFIN
|
|
help
|
|
Enable support for a SPI bus via the Blackfin SPORT peripheral.
|
|
|
|
config SPI_AU1550
|
|
tristate "Au1550/Au1200/Au1300 SPI Controller"
|
|
depends on MIPS_ALCHEMY
|
|
select SPI_BITBANG
|
|
help
|
|
If you say yes to this option, support will be included for the
|
|
PSC SPI controller found on Au1550, Au1200 and Au1300 series.
|
|
|
|
config SPI_BCM63XX
|
|
tristate "Broadcom BCM63xx SPI controller"
|
|
depends on BCM63XX
|
|
help
|
|
Enable support for the SPI controller on the Broadcom BCM63xx SoCs.
|
|
|
|
config SPI_BITBANG
|
|
tristate "Utilities for Bitbanging SPI masters"
|
|
help
|
|
With a few GPIO pins, your system can bitbang the SPI protocol.
|
|
Select this to get SPI support through I/O pins (GPIO, parallel
|
|
port, etc). Or, some systems' SPI master controller drivers use
|
|
this code to manage the per-word or per-transfer accesses to the
|
|
hardware shift registers.
|
|
|
|
This is library code, and is automatically selected by drivers that
|
|
need it. You only need to select this explicitly to support driver
|
|
modules that aren't part of this kernel tree.
|
|
|
|
config SPI_BUTTERFLY
|
|
tristate "Parallel port adapter for AVR Butterfly (DEVELOPMENT)"
|
|
depends on PARPORT
|
|
select SPI_BITBANG
|
|
help
|
|
This uses a custom parallel port cable to connect to an AVR
|
|
Butterfly <http://www.atmel.com/products/avr/butterfly>, an
|
|
inexpensive battery powered microcontroller evaluation board.
|
|
This same cable can be used to flash new firmware.
|
|
|
|
config SPI_CLPS711X
|
|
tristate "CLPS711X host SPI controller"
|
|
depends on ARCH_CLPS711X
|
|
help
|
|
This enables dedicated general purpose SPI/Microwire1-compatible
|
|
master mode interface (SSI1) for CLPS711X-based CPUs.
|
|
|
|
config SPI_COLDFIRE_QSPI
|
|
tristate "Freescale Coldfire QSPI controller"
|
|
depends on (M520x || M523x || M5249 || M525x || M527x || M528x || M532x)
|
|
help
|
|
This enables support for the Coldfire QSPI controller in master
|
|
mode.
|
|
|
|
config SPI_DAVINCI
|
|
tristate "Texas Instruments DaVinci/DA8x/OMAP-L/AM1x SoC SPI controller"
|
|
depends on ARCH_DAVINCI
|
|
select SPI_BITBANG
|
|
select TI_EDMA
|
|
help
|
|
SPI master controller for DaVinci/DA8x/OMAP-L/AM1x SPI modules.
|
|
|
|
config SPI_EP93XX
|
|
tristate "Cirrus Logic EP93xx SPI controller"
|
|
depends on ARCH_EP93XX
|
|
help
|
|
This enables using the Cirrus EP93xx SPI controller in master
|
|
mode.
|
|
|
|
config SPI_FALCON
|
|
tristate "Falcon SPI controller support"
|
|
depends on SOC_FALCON
|
|
help
|
|
The external bus unit (EBU) found on the FALC-ON SoC has SPI
|
|
emulation that is designed for serial flash access. This driver
|
|
has only been tested with m25p80 type chips. The hardware has no
|
|
support for other types of SPI peripherals.
|
|
|
|
config SPI_GPIO
|
|
tristate "GPIO-based bitbanging SPI Master"
|
|
depends on GENERIC_GPIO
|
|
select SPI_BITBANG
|
|
help
|
|
This simple GPIO bitbanging SPI master uses the arch-neutral GPIO
|
|
interface to manage MOSI, MISO, SCK, and chipselect signals. SPI
|
|
slaves connected to a bus using this driver are configured as usual,
|
|
except that the spi_board_info.controller_data holds the GPIO number
|
|
for the chipselect used by this controller driver.
|
|
|
|
Note that this driver often won't achieve even 1 Mbit/sec speeds,
|
|
making it unusually slow for SPI. If your platform can inline
|
|
GPIO operations, you should be able to leverage that for better
|
|
speed with a custom version of this driver; see the source code.
|
|
|
|
config SPI_IMX
|
|
tristate "Freescale i.MX SPI controllers"
|
|
depends on ARCH_MXC
|
|
select SPI_BITBANG
|
|
default m if IMX_HAVE_PLATFORM_SPI_IMX
|
|
help
|
|
This enables using the Freescale i.MX SPI controllers in master
|
|
mode.
|
|
|
|
config SPI_LM70_LLP
|
|
tristate "Parallel port adapter for LM70 eval board (DEVELOPMENT)"
|
|
depends on PARPORT
|
|
select SPI_BITBANG
|
|
help
|
|
This driver supports the NS LM70 LLP Evaluation Board,
|
|
which interfaces to an LM70 temperature sensor using
|
|
a parallel port.
|
|
|
|
config SPI_MPC52xx
|
|
tristate "Freescale MPC52xx SPI (non-PSC) controller support"
|
|
depends on PPC_MPC52xx
|
|
help
|
|
This drivers supports the MPC52xx SPI controller in master SPI
|
|
mode.
|
|
|
|
config SPI_MPC52xx_PSC
|
|
tristate "Freescale MPC52xx PSC SPI controller"
|
|
depends on PPC_MPC52xx
|
|
help
|
|
This enables using the Freescale MPC52xx Programmable Serial
|
|
Controller in master SPI mode.
|
|
|
|
config SPI_MPC512x_PSC
|
|
tristate "Freescale MPC512x PSC SPI controller"
|
|
depends on PPC_MPC512x
|
|
help
|
|
This enables using the Freescale MPC5121 Programmable Serial
|
|
Controller in SPI master mode.
|
|
|
|
config SPI_FSL_LIB
|
|
tristate
|
|
depends on FSL_SOC
|
|
|
|
config SPI_FSL_SPI
|
|
bool "Freescale SPI controller"
|
|
depends on FSL_SOC
|
|
select SPI_FSL_LIB
|
|
help
|
|
This enables using the Freescale SPI controllers in master mode.
|
|
MPC83xx platform uses the controller in cpu mode or CPM/QE mode.
|
|
MPC8569 uses the controller in QE mode, MPC8610 in cpu mode.
|
|
|
|
config SPI_FSL_ESPI
|
|
bool "Freescale eSPI controller"
|
|
depends on FSL_SOC
|
|
select SPI_FSL_LIB
|
|
help
|
|
This enables using the Freescale eSPI controllers in master mode.
|
|
From MPC8536, 85xx platform uses the controller, and all P10xx,
|
|
P20xx, P30xx,P40xx, P50xx uses this controller.
|
|
|
|
config SPI_OC_TINY
|
|
tristate "OpenCores tiny SPI"
|
|
depends on GENERIC_GPIO
|
|
select SPI_BITBANG
|
|
help
|
|
This is the driver for OpenCores tiny SPI master controller.
|
|
|
|
config SPI_OCTEON
|
|
tristate "Cavium OCTEON SPI controller"
|
|
depends on CPU_CAVIUM_OCTEON
|
|
help
|
|
SPI host driver for the hardware found on some Cavium OCTEON
|
|
SOCs.
|
|
|
|
config SPI_OMAP_UWIRE
|
|
tristate "OMAP1 MicroWire"
|
|
depends on ARCH_OMAP1
|
|
select SPI_BITBANG
|
|
help
|
|
This hooks up to the MicroWire controller on OMAP1 chips.
|
|
|
|
config SPI_OMAP24XX
|
|
tristate "McSPI driver for OMAP"
|
|
depends on ARCH_OMAP2PLUS
|
|
help
|
|
SPI master controller for OMAP24XX and later Multichannel SPI
|
|
(McSPI) modules.
|
|
|
|
config SPI_OMAP_100K
|
|
tristate "OMAP SPI 100K"
|
|
depends on ARCH_OMAP850 || ARCH_OMAP730
|
|
help
|
|
OMAP SPI 100K master controller for omap7xx boards.
|
|
|
|
config SPI_ORION
|
|
tristate "Orion SPI master"
|
|
depends on PLAT_ORION
|
|
help
|
|
This enables using the SPI master controller on the Orion chips.
|
|
|
|
config SPI_PL022
|
|
tristate "ARM AMBA PL022 SSP controller"
|
|
depends on ARM_AMBA
|
|
default y if MACH_U300
|
|
default y if ARCH_REALVIEW
|
|
default y if INTEGRATOR_IMPD1
|
|
default y if ARCH_VERSATILE
|
|
help
|
|
This selects the ARM(R) AMBA(R) PrimeCell PL022 SSP
|
|
controller. If you have an embedded system with an AMBA(R)
|
|
bus and a PL022 controller, say Y or M here.
|
|
|
|
config SPI_PPC4xx
|
|
tristate "PPC4xx SPI Controller"
|
|
depends on PPC32 && 4xx
|
|
select SPI_BITBANG
|
|
help
|
|
This selects a driver for the PPC4xx SPI Controller.
|
|
|
|
config SPI_PXA2XX_PXADMA
|
|
bool "PXA2xx SSP legacy PXA DMA API support"
|
|
depends on SPI_PXA2XX && ARCH_PXA
|
|
help
|
|
Enable PXA private legacy DMA API support. Note that this is
|
|
deprecated in favor of generic DMA engine API.
|
|
|
|
config SPI_PXA2XX_DMA
|
|
def_bool y
|
|
depends on SPI_PXA2XX && !SPI_PXA2XX_PXADMA
|
|
|
|
config SPI_PXA2XX
|
|
tristate "PXA2xx SSP SPI master"
|
|
depends on ARCH_PXA || PCI || ACPI
|
|
select PXA_SSP if ARCH_PXA
|
|
help
|
|
This enables using a PXA2xx or Sodaville SSP port as a SPI master
|
|
controller. The driver can be configured to use any SSP port and
|
|
additional documentation can be found a Documentation/spi/pxa2xx.
|
|
|
|
config SPI_PXA2XX_PCI
|
|
def_tristate SPI_PXA2XX && PCI
|
|
|
|
config SPI_RSPI
|
|
tristate "Renesas RSPI controller"
|
|
depends on SUPERH
|
|
help
|
|
SPI driver for Renesas RSPI blocks.
|
|
|
|
config SPI_S3C24XX
|
|
tristate "Samsung S3C24XX series SPI"
|
|
depends on ARCH_S3C24XX
|
|
select SPI_BITBANG
|
|
help
|
|
SPI driver for Samsung S3C24XX series ARM SoCs
|
|
|
|
config SPI_S3C24XX_FIQ
|
|
bool "S3C24XX driver with FIQ pseudo-DMA"
|
|
depends on SPI_S3C24XX
|
|
select FIQ
|
|
help
|
|
Enable FIQ support for the S3C24XX SPI driver to provide pseudo
|
|
DMA by using the fast-interrupt request framework, This allows
|
|
the driver to get DMA-like performance when there are either
|
|
no free DMA channels, or when doing transfers that required both
|
|
TX and RX data paths.
|
|
|
|
config SPI_S3C64XX
|
|
tristate "Samsung S3C64XX series type SPI"
|
|
depends on (ARCH_S3C24XX || ARCH_S3C64XX || ARCH_S5P64X0 || ARCH_EXYNOS)
|
|
select S3C64XX_DMA if ARCH_S3C64XX
|
|
help
|
|
SPI driver for Samsung S3C64XX and newer SoCs.
|
|
|
|
config SPI_SC18IS602
|
|
tristate "NXP SC18IS602/602B/603 I2C to SPI bridge"
|
|
depends on I2C
|
|
help
|
|
SPI driver for NXP SC18IS602/602B/603 I2C to SPI bridge.
|
|
|
|
config SPI_SH_MSIOF
|
|
tristate "SuperH MSIOF SPI controller"
|
|
depends on (SUPERH || ARCH_SHMOBILE) && HAVE_CLK
|
|
select SPI_BITBANG
|
|
help
|
|
SPI driver for SuperH and SH Mobile MSIOF blocks.
|
|
|
|
config SPI_SH
|
|
tristate "SuperH SPI controller"
|
|
depends on SUPERH
|
|
help
|
|
SPI driver for SuperH SPI blocks.
|
|
|
|
config SPI_SH_SCI
|
|
tristate "SuperH SCI SPI controller"
|
|
depends on SUPERH
|
|
select SPI_BITBANG
|
|
help
|
|
SPI driver for SuperH SCI blocks.
|
|
|
|
config SPI_SH_HSPI
|
|
tristate "SuperH HSPI controller"
|
|
depends on ARCH_SHMOBILE
|
|
help
|
|
SPI driver for SuperH HSPI blocks.
|
|
|
|
config SPI_SIRF
|
|
tristate "CSR SiRFprimaII SPI controller"
|
|
depends on ARCH_PRIMA2
|
|
select SPI_BITBANG
|
|
help
|
|
SPI driver for CSR SiRFprimaII SoCs
|
|
|
|
config SPI_MXS
|
|
tristate "Freescale MXS SPI controller"
|
|
depends on ARCH_MXS
|
|
select STMP_DEVICE
|
|
help
|
|
SPI driver for Freescale MXS devices.
|
|
|
|
config SPI_TEGRA20_SFLASH
|
|
tristate "Nvidia Tegra20 Serial flash Controller"
|
|
depends on ARCH_TEGRA
|
|
help
|
|
SPI driver for Nvidia Tegra20 Serial flash Controller interface.
|
|
The main usecase of this controller is to use spi flash as boot
|
|
device.
|
|
|
|
config SPI_TEGRA20_SLINK
|
|
tristate "Nvidia Tegra20/Tegra30 SLINK Controller"
|
|
depends on ARCH_TEGRA && TEGRA20_APB_DMA
|
|
help
|
|
SPI driver for Nvidia Tegra20/Tegra30 SLINK Controller interface.
|
|
|
|
config SPI_TI_SSP
|
|
tristate "TI Sequencer Serial Port - SPI Support"
|
|
depends on MFD_TI_SSP
|
|
help
|
|
This selects an SPI master implementation using a TI sequencer
|
|
serial port.
|
|
|
|
config SPI_TOPCLIFF_PCH
|
|
tristate "Intel EG20T PCH/LAPIS Semicon IOH(ML7213/ML7223/ML7831) SPI"
|
|
depends on PCI
|
|
help
|
|
SPI driver for the Topcliff PCH (Platform Controller Hub) SPI bus
|
|
used in some x86 embedded processors.
|
|
|
|
This driver also supports the ML7213/ML7223/ML7831, a companion chip
|
|
for the Atom E6xx series and compatible with the Intel EG20T PCH.
|
|
|
|
config SPI_TXX9
|
|
tristate "Toshiba TXx9 SPI controller"
|
|
depends on GENERIC_GPIO && CPU_TX49XX
|
|
help
|
|
SPI driver for Toshiba TXx9 MIPS SoCs
|
|
|
|
config SPI_XCOMM
|
|
tristate "Analog Devices AD-FMCOMMS1-EBZ SPI-I2C-bridge driver"
|
|
depends on I2C
|
|
help
|
|
Support for the SPI-I2C bridge found on the Analog Devices
|
|
AD-FMCOMMS1-EBZ board.
|
|
|
|
config SPI_XILINX
|
|
tristate "Xilinx SPI controller common module"
|
|
depends on HAS_IOMEM
|
|
select SPI_BITBANG
|
|
help
|
|
This exposes the SPI controller IP from the Xilinx EDK.
|
|
|
|
See the "OPB Serial Peripheral Interface (SPI) (v1.00e)"
|
|
Product Specification document (DS464) for hardware details.
|
|
|
|
Or for the DS570, see "XPS Serial Peripheral Interface (SPI) (v2.00b)"
|
|
|
|
config SPI_NUC900
|
|
tristate "Nuvoton NUC900 series SPI"
|
|
depends on ARCH_W90X900
|
|
select SPI_BITBANG
|
|
help
|
|
SPI driver for Nuvoton NUC900 series ARM SoCs
|
|
|
|
#
|
|
# Add new SPI master controllers in alphabetical order above this line
|
|
#
|
|
|
|
config SPI_DESIGNWARE
|
|
tristate "DesignWare SPI controller core support"
|
|
help
|
|
general driver for SPI controller core from DesignWare
|
|
|
|
config SPI_DW_PCI
|
|
tristate "PCI interface driver for DW SPI core"
|
|
depends on SPI_DESIGNWARE && PCI
|
|
|
|
config SPI_DW_MID_DMA
|
|
bool "DMA support for DW SPI controller on Intel Moorestown platform"
|
|
depends on SPI_DW_PCI && INTEL_MID_DMAC
|
|
|
|
config SPI_DW_MMIO
|
|
tristate "Memory-mapped io interface driver for DW SPI core"
|
|
depends on SPI_DESIGNWARE && HAVE_CLK
|
|
|
|
#
|
|
# There are lots of SPI device types, with sensors and memory
|
|
# being probably the most widely used ones.
|
|
#
|
|
comment "SPI Protocol Masters"
|
|
|
|
config SPI_SPIDEV
|
|
tristate "User mode SPI device driver support"
|
|
help
|
|
This supports user mode SPI protocol drivers.
|
|
|
|
Note that this application programming interface is EXPERIMENTAL
|
|
and hence SUBJECT TO CHANGE WITHOUT NOTICE while it stabilizes.
|
|
|
|
config SPI_TLE62X0
|
|
tristate "Infineon TLE62X0 (for power switching)"
|
|
depends on SYSFS
|
|
help
|
|
SPI driver for Infineon TLE62X0 series line driver chips,
|
|
such as the TLE6220, TLE6230 and TLE6240. This provides a
|
|
sysfs interface, with each line presented as a kind of GPIO
|
|
exposing both switch control and diagnostic feedback.
|
|
|
|
#
|
|
# Add new SPI protocol masters in alphabetical order above this line
|
|
#
|
|
|
|
endif # SPI_MASTER
|
|
|
|
# (slave support would go here)
|
|
|
|
endif # SPI
|