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54 commits

Author SHA1 Message Date
Tejun Heo
5a0e3ad6af include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
percpu.h is included by sched.h and module.h and thus ends up being
included when building most .c files.  percpu.h includes slab.h which
in turn includes gfp.h making everything defined by the two files
universally available and complicating inclusion dependencies.

percpu.h -> slab.h dependency is about to be removed.  Prepare for
this change by updating users of gfp and slab facilities include those
headers directly instead of assuming availability.  As this conversion
needs to touch large number of source files, the following script is
used as the basis of conversion.

  http://userweb.kernel.org/~tj/misc/slabh-sweep.py

The script does the followings.

* Scan files for gfp and slab usages and update includes such that
  only the necessary includes are there.  ie. if only gfp is used,
  gfp.h, if slab is used, slab.h.

* When the script inserts a new include, it looks at the include
  blocks and try to put the new include such that its order conforms
  to its surrounding.  It's put in the include block which contains
  core kernel includes, in the same order that the rest are ordered -
  alphabetical, Christmas tree, rev-Xmas-tree or at the end if there
  doesn't seem to be any matching order.

* If the script can't find a place to put a new include (mostly
  because the file doesn't have fitting include block), it prints out
  an error message indicating which .h file needs to be added to the
  file.

The conversion was done in the following steps.

1. The initial automatic conversion of all .c files updated slightly
   over 4000 files, deleting around 700 includes and adding ~480 gfp.h
   and ~3000 slab.h inclusions.  The script emitted errors for ~400
   files.

2. Each error was manually checked.  Some didn't need the inclusion,
   some needed manual addition while adding it to implementation .h or
   embedding .c file was more appropriate for others.  This step added
   inclusions to around 150 files.

3. The script was run again and the output was compared to the edits
   from #2 to make sure no file was left behind.

4. Several build tests were done and a couple of problems were fixed.
   e.g. lib/decompress_*.c used malloc/free() wrappers around slab
   APIs requiring slab.h to be added manually.

5. The script was run on all .h files but without automatically
   editing them as sprinkling gfp.h and slab.h inclusions around .h
   files could easily lead to inclusion dependency hell.  Most gfp.h
   inclusion directives were ignored as stuff from gfp.h was usually
   wildly available and often used in preprocessor macros.  Each
   slab.h inclusion directive was examined and added manually as
   necessary.

6. percpu.h was updated not to include slab.h.

7. Build test were done on the following configurations and failures
   were fixed.  CONFIG_GCOV_KERNEL was turned off for all tests (as my
   distributed build env didn't work with gcov compiles) and a few
   more options had to be turned off depending on archs to make things
   build (like ipr on powerpc/64 which failed due to missing writeq).

   * x86 and x86_64 UP and SMP allmodconfig and a custom test config.
   * powerpc and powerpc64 SMP allmodconfig
   * sparc and sparc64 SMP allmodconfig
   * ia64 SMP allmodconfig
   * s390 SMP allmodconfig
   * alpha SMP allmodconfig
   * um on x86_64 SMP allmodconfig

8. percpu.h modifications were reverted so that it could be applied as
   a separate patch and serve as bisection point.

Given the fact that I had only a couple of failures from tests on step
6, I'm fairly confident about the coverage of this conversion patch.
If there is a breakage, it's likely to be something in one of the arch
headers which should be easily discoverable easily on most builds of
the specific arch.

Signed-off-by: Tejun Heo <tj@kernel.org>
Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
2010-03-30 22:02:32 +09:00
Eirik Aanonsen
640e95abdf USB: atmel uaba: Adding invert vbus_pin
Adding vbus_pin_inverted so that the usb detect pin can be active high
or low depending on HW implementation also replaced the
gpio_get_value(udc->vbus_pin); with a call to vbus_is_present(udc); This
allows the driver to be loaded and save about 0,15W on the consumption.

Signed-off-by: Eirik Aanonsen <eaa@wprmedical.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-03-02 14:54:57 -08:00
Hans-Christian Egtvedt
cbf8de1620 avr32: clean up memory allocation in at32_add_device_mci
This patch will check if the kzalloc for the MCI DMA struct actually
returns a valid address, and also clean up properly if it fails or the
function fails at a later stage.

This also silences a compiler warning about using the slave variable
uninitialized.

Signed-off-by: Hans-Christian Egtvedt <hans-christian.egtvedt@atmel.com>
Signed-off-by: Haavard Skinnemoen <haavard.skinnemoen@atmel.com>
2009-12-28 12:33:00 +01:00
Peter Huewe
754a00aeb2 arch/avr32: Fix build failure for avr32 caused by typo
This patch fixes a build failure introduced by the patch
  atmel-mci: change use of dma slave interface by Nicolas Ferre
by changing mci_dma_slave to the correct name of mci_dma_data

This should make the avr32 tree build again.

References:
http://kisskb.ellerman.id.au/kisskb/buildresult/1893610/
http://git.kernel.org/?p=linux/kernel/git/sfr/linux-next.git;a=commitdiff;h=2635d1ba711560d521f6218c585a3e0401f566e1

Patch against Linus' tree.

Signed-off-by: Peter Huewe <peterhuewe@gmx.de>
Signed-off-by: Haavard Skinnemoen <haavard.skinnemoen@atmel.com>
2009-12-28 11:24:09 +01:00
Linus Torvalds
050cbb09da Merge git://git.kernel.org/pub/scm/linux/kernel/git/hskinnemoen/avr32-2.6
* git://git.kernel.org/pub/scm/linux/kernel/git/hskinnemoen/avr32-2.6:
  avr32: update default configurations for ATNGW100, ATSTK1002 and ATSTK1006
  avr32: add default configurations for ATNGW100 mkII and EVKLCD10X
  avr32: add support for ATNGW100 mkII board
  avr32: convert to asm-generic/hardirq.h
  avr32: add two new at91 to cpu.h definition
  avr32: clean up linker script using standard macros.
  avr32: MRMT: correct setup of SPI slaves
  avr32: function for independently setting up SPI slaves
  avr32: re-instate MCI WP/CD pin assignments for ATNGW100
2009-12-15 09:01:00 -08:00
Nicolas Ferre
2635d1ba71 atmel-mci: change use of dma slave interface
Allow the use of another DMA controller driver in atmel-mci sd/mmc driver.
 This adds a generic dma_slave pointer to the mci platform structure where
we can store DMA controller information.  In atmel-mci we use information
provided by this structure to initialize the driver (with new helper
functions that are architecture dependant).

This also adds at32/avr32 chip modifications to cope with this new access
method.

Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Cc: Haavard Skinnemoen <hskinnemoen@atmel.com>
Cc: <linux-mmc@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-12-15 08:53:35 -08:00
Peter Ma
0708420370 avr32: function for independently setting up SPI slaves
at32ap_spi_setup_slaves() is exposed to allow the addition of SPI slaves
to a SPI bus that has already been registered.  This is especially
useful for add-on cards, which have their own board setup function.
at32ap_spi_add_device() has been slightly re-organized, but should be
transparent to existing users.

So to add a SPI slave, after a SPI bus has already been registered:

	/* Configure the list of slaves on SPI controller "id" */
	at32_spi_setup_slaves(id,spi_board_info,ARRAY_SIZE(spi_board_info));
 	/* Register the list of slaves */
 	spi_register_board_info(spi_board_info,ARRAY_SIZE(spi_board_info));

Signed-off-by: Peter Ma <pma@mediamatech.com>
[haavard.skinnemoen@atmel.com: trivial whitespace fix]
Signed-off-by: Haavard Skinnemoen <haavard.skinnemoen@atmel.com>
2009-08-27 10:20:58 +02:00
Yang Hongyang
284901a90a dma-mapping: replace all DMA_32BIT_MASK macro with DMA_BIT_MASK(32)
Replace all DMA_32BIT_MASK macro with DMA_BIT_MASK(32)

Signed-off-by: Yang Hongyang<yanghy@cn.fujitsu.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-04-07 08:31:11 -07:00
Peter Ma
bf4861cf3e avr32: add RTS/CTS/CLK pin selection for the USARTs
Adds extra parameter to AT32 at32_map_usart(), so as to reserve
RTS/CTS/CLK pins.

All boards under arch/avr32/boards have been updated (trivial change), but
not all have been tested.

Signed-off-by: Peter Ma <pma@mediamatech.com>
Signed-off-by: Haavard Skinnemoen <haavard.skinnemoen@atmel.com>
2009-04-01 16:13:45 +02:00
Hans-Christian Egtvedt
2f47c8c555 avr32: at32ap700x: setup DMA for AC97C in the machine code
This patch will adjust the setup the DMA controller for the AC97
Controller in the at32ap700x machine code. This setup matches the new
ALSA driver for the AC97C.

The struct ac97c_platform_data has been moved into its own header file
located in the sound include path.

Tested on ATSTK1006 + ATSTK1000.

This patch will setup the AC97 controller properly for the adjusted
machine code. Both EVKLCD10x and Hammerhead board has been updated.

Tested on EVKLCD10x, and copied to Hammerhead board.

Signed-off-by: Hans-Christian Egtvedt <hans-christian.egtvedt@atmel.com>
[haavard.skinnemoen@atmel.com: fold with board code update]
Signed-off-by: Haavard Skinnemoen <haavard.skinnemoen@atmel.com>
2009-03-27 16:15:39 +01:00
Hans-Christian Egtvedt
6b0c935142 avr32: at32ap700x: setup DMA for ABDAC in the machine code
This patch will adjust the setup the DMA controller for the Audio
Bistream DAC in the at32ap700x machine code. This setup matches the new
ALSA driver for the ABDAC.

Tested on ATSTK1006 + ATSTK1000.

This patch will setup the needed platform data for the Audio Bistream
DAC used by the Favr-32 board.

Signed-off-by: Hans-Christian Egtvedt <hans-christian.egtvedt@atmel.com>
[haavard.skinnemoen@atmel.com: fold board code update]
Signed-off-by: Haavard Skinnemoen <haavard.skinnemoen@atmel.com>
2009-03-27 16:15:39 +01:00
Hans-Christian Egtvedt
9477ab2b2a avr32: use gpio_is_valid() to check USBA vbus_pin I/O line
This patch will use gpio_is_valid() to check the vbus_pin I/O line.

Signed-off-by: Hans-Christian Egtvedt <hans-christian.egtvedt@atmel.com>
Signed-off-by: Haavard Skinnemoen <haavard.skinnemoen@atmel.com>
2009-03-26 14:59:01 +01:00
Linus Torvalds
d9e8a3a5b8 Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/djbw/async_tx
* 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/djbw/async_tx: (22 commits)
  ioat: fix self test for multi-channel case
  dmaengine: bump initcall level to arch_initcall
  dmaengine: advertise all channels on a device to dma_filter_fn
  dmaengine: use idr for registering dma device numbers
  dmaengine: add a release for dma class devices and dependent infrastructure
  ioat: do not perform removal actions at shutdown
  iop-adma: enable module removal
  iop-adma: kill debug BUG_ON
  iop-adma: let devm do its job, don't duplicate free
  dmaengine: kill enum dma_state_client
  dmaengine: remove 'bigref' infrastructure
  dmaengine: kill struct dma_client and supporting infrastructure
  dmaengine: replace dma_async_client_register with dmaengine_get
  atmel-mci: convert to dma_request_channel and down-level dma_slave
  dmatest: convert to dma_request_channel
  dmaengine: introduce dma_request_channel and private channels
  net_dma: convert to dma_find_channel
  dmaengine: provide a common 'issue_pending_all' implementation
  dmaengine: centralize channel allocation, introduce dma_find_channel
  dmaengine: up-level reference counting to the module level
  ...
2009-01-09 11:52:14 -08:00
Dan Williams
74465b4ff9 atmel-mci: convert to dma_request_channel and down-level dma_slave
dma_request_channel provides an exclusive channel, so we no longer need to
pass slave data through dmaengine.

Cc: Haavard Skinnemoen <haavard.skinnemoen@atmel.com>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2009-01-06 11:38:16 -07:00
Haavard Skinnemoen
0e49005090 Merge branch 'move-atmel-mci-h' into boards 2009-01-05 16:36:07 +01:00
Nicolas Ferre
c42aa775cc atmel-mci: move atmel-mci.h file to include/linux
Needed to use the atmel-mci driver in an architecture
independant maner.

Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: Haavard Skinnemoen <haavard.skinnemoen@atmel.com>
2009-01-05 16:35:31 +01:00
Alex Raimondi
dd5e1339e5 avr32: Hammerhead board support
The Hammerhead platform is built around a AVR32 32-bit microcontroller
from Atmel.  It offers versatile peripherals, such as ethernet, usb
device, usb host etc.

The board also incooperates a power supply and is a Power over Ethernet
(PoE) Powered Device (PD).

Additonally, a Cyclone III FPGA from Altera is integrated on the board.
The FPGA is mapped into the 32-bit AVR memory bus. The FPGA offers two
DDR2 SDRAM interfaces, which will cover even the most exceptional need
of memory bandwidth. Together with the onboard video decoder the board
is ready for video processing.

This patch does include the basic support for the fpga device driver,
but not the device driver itself.

Signed-off-by: Alex Raimondi <mailinglist@miromico.ch>
Signed-off-by: Haavard Skinnemoen <haavard.skinnemoen@atmel.com>
2009-01-05 15:52:04 +01:00
Anders Blomdell
105462632c avr32: Enable pullup on USART TX lines
Make USART initialization conform to Section 24.6.1 in the AT32AP7000 manual,
i.e. "To prevent the TXD line from falling when the USART is disabled, the use
of an internal pull up is mandatory."

Signed-off-by: Anders Blomdell <anders.blomdell@control.lth.se>
[haavard.skinnemoen@atmel.com: enable pullup on RX as well]
Signed-off-by: Haavard Skinnemoen <haavard.skinnemoen@atmel.com>
2008-10-24 15:45:48 +02:00
Haavard Skinnemoen
d9214556b1 Merge branches 'boards' and 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/hskinnemoen/avr32-2.6 2008-10-23 15:24:10 +02:00
Haavard Skinnemoen
e82c6106b0 avr32: Fix GPIO initcall breakage
Add essential system devices, including GPIO controllers, automatically
at core_initcall time. This ensures that the devices are there when the
PIO driver gets initialized at postcore_initcall, fixing a bug exposed
by commit d6634db8fe "avr32: Use
platform_driver_probe for pio platform driver".

Signed-off-by: Haavard Skinnemoen <haavard.skinnemoen@atmel.com>
2008-10-23 15:18:33 +02:00
Alex Raimondi
6090065663 avr32: Fix bug in LCD pin setup on port C
Bug was introduced with the new at32_select_periph function.

Signed-off-by: Alex Raimondi <mailinglist@miromico.ch>
Signed-off-by: Haavard Skinnemoen <haavard.skinnemoen@atmel.com>
2008-10-23 15:18:22 +02:00
Mark Jackson
198f29358a avr32: Fix MIMC200 board use of SPD network pins
The MIMC200 board uses the SPD output pin from the Ethernet MACs for
other purposes.

One of these is as a board-reset, so I've had to #define off the SPD
output pin declaration.

This is probably not the best way of achieving this, but works in the
current framework.

Signed-off-by: Mark Jackson <mpfj@mimc.co.uk>
Signed-off-by: Haavard Skinnemoen <haavard.skinnemoen@atmel.com>
2008-10-13 16:36:11 +02:00
Julien May
caf18f19ee avr32: Allow selecting multiple pins at once
at32_select_periph() now takes an u32 bitmask rather than a single pin.
This allows to set multiple pins at once.

Signed-off-by: Alex Raimondi <mailinglist@miromico.ch>
Signed-off-by: Haavard Skinnemoen <haavard.skinnemoen@atmel.com>
2008-10-12 15:54:00 +02:00
Haavard Skinnemoen
0d62950125 Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/hskinnemoen/atmel-mci-2.6.28 2008-10-12 15:44:33 +02:00
Haavard Skinnemoen
65e8b083fc atmel-mci: Add experimental DMA support
This adds support for DMA transfers through the generic DMA engine
framework with the DMA slave extensions.

The driver has been tested using mmc-block and ext3fs on several SD,
SDHC and MMC+ cards. Reads and writes work fine, with read transfer
rates up to 7.5 MiB/s on fast cards with debugging disabled.

Unfortunately, the driver has been known to lock up from time to time
with DMA enabled, so DMA support is currently optional and marked
EXPERIMENTAL. However, I didn't see any problems while testing 13
different cards (MMC, SD and SDHC of different brands and sizes), so I
suspect the "Initialize BLKR before sending data transfer command" fix
that was posted earlier fixed this as well.

Signed-off-by: Haavard Skinnemoen <haavard.skinnemoen@atmel.com>
2008-10-05 20:39:21 +02:00
Haavard Skinnemoen
6b918657b7 atmel-mci: Platform code for supporting multiple mmc slots
Add the necessary platform infrastructure to support multiple mmc/sdcard
slots all at once through a single controller. Currently, the driver
will use the first valid slot it finds and stick with that, but later
patches will add support for switching between several slots on the fly.

Extend the platform data structure with per-slot information: MMC/SDcard
bus width and card detect/write protect pins. This will affect the pin
muxing as well as the capabilities announced to the mmc core.

Note that board code is now required to supply a mci_platform_data
struct to at32_add_device_mci().

Signed-off-by: Haavard Skinnemoen <haavard.skinnemoen@atmel.com>
2008-10-05 20:39:21 +02:00
Alex Raimondi
300bb76251 avr32: Replace static clock list with dynamic linked list
This replaces the at32_clock_list array with a linked list.
Clocks can now be registered (added) to the list.

Signed-off-by: Alex Raimondi <raimondi@miromico.ch>
Signed-off-by: Haavard Skinnemoen <haavard.skinnemoen@atmel.com>
2008-10-05 19:33:48 +02:00
Julien May
7066412488 avr32: Allow fine-grained control over LCDC pins
This replaces the pin_config param with an u64 pin_mask in
at32_add_device_lcdc, allowing a board-maintainer to indivually select
specific lcdc pins.

Signed-off-by: Alex Raimondi <raimondi@miromico.ch>
Signed-off-by: Julien May <jmay@miromico.ch>
Signed-off-by: Haavard Skinnemoen <haavard.skinnemoen@atmel.com>
2008-09-22 09:51:01 +02:00
Haavard Skinnemoen
b47eb4092f avr32: Clean up HMATRIX code
Introduce a few helper functions for HMATRIX configuration and clean up
the register definitions. Also add definitions for the HMATRIX master
and slave IDs on the AT32AP700x chips.

Also make the definitions in hmatrix.h available to board code by moving
it to <mach/hmatrix.h>

Signed-off-by: Haavard Skinnemoen <haavard.skinnemoen@atmel.com>
2008-08-08 12:44:01 +02:00
Haavard Skinnemoen
3663b736a5 avr32: Use <mach/foo.h> instead of <asm/arch/foo.h>
Update all avr32-specific files to use the new platform-specific header
locations. Drivers shared with ARM are left alone for now.

Signed-off-by: Haavard Skinnemoen <haavard.skinnemoen@atmel.com>
2008-08-05 14:36:57 +02:00
David Brownell
3c26e17032 avr32: some mmc/sd cleanups
Minor cleanups for the MMC/SD support on avr32:

 - Make at32_add_device_mci() properly initialize "missing"
   platform data ... so boards like STK1002 won't try GPIO 0.

 - Switch over to gpio_is_valid() instead of testing for only
   one designated value.

 - Provide STK1002 platform data for the unlikely case that
   switches are set so first Ethernet controller isn't in use.
   (That's the only way to get card detect and writeprotect
   switch sensing on the STK1000.)

And get rid of one "unused variable" warning.

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Haavard Skinnemoen <haavard.skinnemoen@atmel.com>
2008-07-27 13:57:36 +02:00
Haavard Skinnemoen
eda3d8f560 Merge commit 'upstream/master' 2008-07-27 13:54:08 +02:00
David Woodhouse
ff877ea80e Merge branch 'linux-next' of git://git.infradead.org/~dedekind/ubi-2.6 2008-07-25 10:40:14 -04:00
Hans-Christian Egtvedt
218df4a25a avr32: Add platform data for AC97C platform device
This patch adds platform data to the AC97C platform device. This will
let the board add a GPIO line which is connected to the external codecs
reset line.

The platform data, ac97c_platform_data, must also contain the DMA
controller ID, RX channel ID and TX channel ID.

Tested with Wolfson WM9712 and AP7000.

Signed-off-by: Hans-Christian Egtvedt <hcegtvedt@atmel.com>
Signed-off-by: Haavard Skinnemoen <haavard.skinnemoen@atmel.com>
2008-07-24 13:51:46 +02:00
Linus Torvalds
5554b35933 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/djbw/async_tx
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/djbw/async_tx: (24 commits)
  I/OAT: I/OAT version 3.0 support
  I/OAT: tcp_dma_copybreak default value dependent on I/OAT version
  I/OAT: Add watchdog/reset functionality to ioatdma
  iop_adma: cleanup iop_chan_xor_slot_count
  iop_adma: document how to calculate the minimum descriptor pool size
  iop_adma: directly reclaim descriptors on allocation failure
  async_tx: make async_tx_test_ack a boolean routine
  async_tx: remove depend_tx from async_tx_sync_epilog
  async_tx: export async_tx_quiesce
  async_tx: fix handling of the "out of descriptor" condition in async_xor
  async_tx: ensure the xor destination buffer remains dma-mapped
  async_tx: list_for_each_entry_rcu() cleanup
  dmaengine: Driver for the Synopsys DesignWare DMA controller
  dmaengine: Add slave DMA interface
  dmaengine: add DMA_COMPL_SKIP_{SRC,DEST}_UNMAP flags to control dma unmap
  dmaengine: Add dma_client parameter to device_alloc_chan_resources
  dmatest: Simple DMA memcpy test client
  dmaengine: DMA engine driver for Marvell XOR engine
  iop-adma: fix platform driver hotplug/coldplug
  dmaengine: track the number of clients using a channel
  ...

Fixed up conflict in drivers/dca/dca-sysfs.c manually
2008-07-23 12:03:18 -07:00
Ben Nizette
fbfca4b878 avr32: clean up mci platform code
This patch does a few small cleanups around the atmel mci platform code
and in the atmel-mci driver.  The platform changes simply removes an
unused variable, uses the fact that by the end we always have some form
of platform data and notes that GPIO_PIN_NONE != 0.  This last point
could cause the incorrect attempt to twice reserve pin PA0.

While we've got the hood up, add linux/err.h to the atmel-mci.c include
list.  It needs it and generally pulls it by voodoo but I did once
stumble across a config which don't build.

This is against Linus' latest git.

Signed-off-by: Ben Nizette <bn@niasdigital.com>
Signed-off-by: Haavard Skinnemoen <haavard.skinnemoen@atmel.com>
2008-07-18 11:01:16 +02:00
Haavard Skinnemoen
7d2be0749a atmel-mci: Driver for Atmel on-chip MMC controllers
This is a driver for the MMC controller on the AP7000 chips from
Atmel. It should in theory work on AT91 systems too with some
tweaking, but since the DMA interface is quite different, it's not
entirely clear if it's worth merging this with the at91_mci driver.

This driver has been around for a while in BSPs and kernel sources
provided by Atmel, but this particular version uses the generic DMA
Engine framework (with the slave extensions) instead of an
avr32-only DMA controller framework.

This driver can also use PIO transfers when no DMA channels are
available, and for transfers where using DMA may be difficult or
impractical for some reason (e.g. the DMA setup overhead is usually
not worth it for very short transfers, and badly aligned buffers or
lengths are difficult to handle.)

Currently, the driver only support PIO transfers. DMA support has been
split out to a separate patch to hopefully make it easier to review.

The driver has been tested using mmc-block and ext3fs on several SD,
SDHC and MMC+ cards. Reads and writes work fine, with read transfer
rates up to 3.5 MiB/s on fast cards with debugging disabled.

The driver has also been tested using the mmc_test module on the same
cards. All tests except 7, 9, 15 and 17 succeed. The first two are
unsupported by all the cards I have, so I don't know if the driver
handles this correctly. The last two fail because the hardware flags a
Data CRC Error instead of a Data Timeout error. I'm not sure how to deal
with that.

Documentation for this controller can be found in many data sheets from
Atmel, including the AT32AP7000 data sheet which can be found here:

http://www.atmel.com/dyn/products/datasheets.asp?family_id=682

Signed-off-by: Haavard Skinnemoen <haavard.skinnemoen@atmel.com>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2008-07-15 14:14:49 +02:00
Haavard Skinnemoen
3bfb1d20b5 dmaengine: Driver for the Synopsys DesignWare DMA controller
This adds a driver for the Synopsys DesignWare DMA controller (aka
DMACA on AVR32 systems.) This DMA controller can be found integrated
on the AT32AP7000 chip and is primarily meant for peripheral DMA
transfer, but can also be used for memory-to-memory transfers.

This patch is based on a driver from David Brownell which was based on
an older version of the DMA Engine framework. It also implements the
proposed extensions to the DMA Engine API for slave DMA operations.

The dmatest client shows no problems, but there may still be room for
improvement performance-wise. DMA slave transfer performance is
definitely "good enough"; reading 100 MiB from an SD card running at ~20
MHz yields ~7.2 MiB/s average transfer rate.

Full documentation for this controller can be found in the Synopsys
DW AHB DMAC Databook:

http://www.synopsys.com/designware/docs/iip/DW_ahb_dmac/latest/doc/dw_ahb_dmac_db.pdf

The controller has lots of implementation options, so it's usually a
good idea to check the data sheet of the chip it's intergrated on as
well. The AT32AP7000 data sheet can be found here:

http://www.atmel.com/dyn/products/datasheets.asp?family_id=682


Changes since v4:
  * Use client_count instead of dma_chan_is_in_use()
  * Add missing include
  * Unmap buffers unless client told us not to

Changes since v3:
  * Update to latest DMA engine and DMA slave APIs
  * Embed the hw descriptor into the sw descriptor
  * Clean up and update MODULE_DESCRIPTION, copyright date, etc.

Changes since v2:
  * Dequeue all pending transfers in terminate_all()
  * Rename dw_dmac.h -> dw_dmac_regs.h
  * Define and use controller-specific dma_slave data
  * Fix up a few outdated comments
  * Define hardware registers as structs (doesn't generate better
    code, unfortunately, but it looks nicer.)
  * Get number of channels from platform_data instead of hardcoding it
    based on CONFIG_WHATEVER_CPU.
  * Give slave clients exclusive access to the channel

Acked-by: Maciej Sosnowski <maciej.sosnowski@intel.com>,
Signed-off-by: Haavard Skinnemoen <haavard.skinnemoen@atmel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2008-07-08 11:59:42 -07:00
Haavard Skinnemoen
b83d6ee175 avr32: Add simple SRAM allocator
Add SRAM allocator for avr32, which is just a thin wrapper around
genalloc.

Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com>
2008-07-02 11:05:01 +02:00
Haavard Skinnemoen
7951f188a0 avr32: Enable SDRAMC clock at startup
The SDRAM controller needs a clock in order to respond to our
commands, and suspend doesn't work very well without the SDRAM in
self-refresh mode.

Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com>
2008-07-02 11:05:01 +02:00
Haavard Skinnemoen
65033ed740 avr32: Move setup_platform() into chip-specific file
Combine at32_clock_init() and at32_portmux_init() into
setup_platform() and remove setup_platform() from at32ap.c. No
functional change since all setup_platform() ever did was call those
two functions.

Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com>
2008-06-28 15:08:39 +02:00
Sedji Gaouaou
8405996ff6 atmel_pwm: Rename the "mck" clock to "pwm_clk"
The name "mck" causes a conflict on AT91. Call it "pwm_clk" instead.

Signed-off-by: Sedji Gaouaou <sedji.gaouaou@atmel.com>
Signed-off-by: Haavard Skinnemoen <haavard.skinnemoen@atmel.com>
2008-06-27 15:32:30 +02:00
David Brownell
9c2baf785e at32ap700x spi: enable pullups on MISO
This is a minor tweak to the at32ap700x pin configuration for the SPI
input pin (MISO), enabling the on-chip weak pullup (typical 190K) to

  (a) ensure a fixed data value for missing or input-only slaves;

  (b) prevent power waste associated with inputs floating near VDDIO/2.

Atmel's boards have no external pullup or pulldown on these pins, so
it's unlikely other boards would address these issues with external
pulldowns.  Were there trouble, board-specific code could turn off
the relevant pullup(s).

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Haavard Skinnemoen <haavard.skinnemoen@atmel.com>
2008-06-27 15:32:29 +02:00
Hans-Christian Egtvedt
d86d314f67 avr32: Add PSIF platform devices
This patch adds the PS/2 interface (PSIF) to the device code, split into
two platform devices, one for each port.

The function for adding the PSIF platform device is also added to the
board header file.

Signed-off-by: Hans-Christian Egtvedt <hcegtvedt@atmel.com>
Signed-off-by: Haavard Skinnemoen <haavard.skinnemoen@atmel.com>
2008-06-27 15:32:28 +02:00
Hans-Christian Egtvedt
47882cf620 avr32: Add pin configuration choice to LCDC peripheral
This patch lets the board code choose which pin out to use for the LCD
interface.

On AT32AP7000 the LCDC is wired to two sets of pins, which lets the user
choose between dual ethernet and 32-bit EBI. For the ATNGW100 board it
is vital to have the choice to select the alternative pinout since this
pinout is routed to the external headers.

Update ATSTK1002 and ATSTK1004 to use the new interface.

Signed-off-by: Hans-Christian Egtvedt <hcegtvedt@atmel.com>
Signed-off-by: Haavard Skinnemoen <haavard.skinnemoen@atmel.com>
2008-06-27 15:32:27 +02:00
Alex
60ed7951d0 avr32: Allow board to define oscillator rates
On our custom board we have other oscillator rates than on atngw100 and
atstk100x.

Currently these rates are hardcoded in arch/avr32/mach-at32ap/at32ap700x.c.

This patch moves them into board specific code.

Signed-off-by: Alex Raimondi <raimondi@miromico.ch>
Signed-off-by: Haavard Skinnemoen <haavard.skinnemoen@atmel.com>
2008-06-27 15:07:16 +02:00
Håvard Skinnemoen
62090a08ab [MTD] [NAND] avr32: atmel_nand platform code for AT32AP700x
This function initializes and adds a platform_device for a NAND flash
interface on SMC chip select 3.

Signed-off-by: Håvard Skinnemoen <haavard.skinnemoen@atmel.com>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2008-06-07 08:45:36 +01:00
Hans-Christian Egtvedt
35bf50ccc8 avr32: Implement set_rate(), set_parent() and mode() for pll1
This patch is a take two of adding full functionality to PLL1 on
AT32AP7000.  This allows board-specific code and drivers to configure
and enable PLL1. This is useful when precise control over the
frequency of e.g. a genclock is needed and requested by users for the
ABDAC device.

The patch is based upon previous patches from both Haavard Skinnemoen
and David Brownell.

Signed-off-by: Hans-Christian Egtvedt <hcegtvedt@atmel.com>
Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com>
2008-04-19 20:40:08 -04:00
David Brownell
e723ff666a avr32: Generic clockevents support
This combines three patches from David Brownell:
  * avr32: tclib support
  * avr32: simplify clocksources
  * avr32: Turn count/compare into a oneshot clockevent device

Register both TC blocks (instead of just the first one) so that
the AT32/AT91 tclib code will pick them up (instead of just the
avr32-only PIT-style clocksource).

Rename the first one and its resources appropriately.

More cleanups to the cycle counter clocksource code

 - Disable all the weak symbol magic; remove the AVR32-only TCB-based
   clocksource code (source and header).

 - Mark the __init code properly.

 - Don't forget to report IRQF_TIMER.

 - Make the system work properly with this clocksource, by preventing
   use of the CPU "idle" sleep state in the idle loop when it's used.

Package the avr32 count/compare timekeeping support as a oneshot
clockevent device, so it supports NO_HZ and high res timers.
This means it also supports plugging in other clockevent devices
and clocksources.

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com>
2008-04-19 20:40:08 -04:00
Ben Nizette
040b28fc0a avr32: pass i2c board info through at32_add_device_twi
New-style I2C drivers require that motherboard-mounted I2C devices are
registered with the I2C core, typically at arch_initcall time.  This
can be done nice and neat by passing the struct i2c_board_info[]
through at32_add_device_twi just like we do for the SPI board info.

While we've got the hood up, remove a duplicate declaration of
at32_add_device_twi() in board.h.

[hskinnemoen@atmel.com: add missing i2c_board_info forward-declaration]
Signed-Off-By: Ben Nizette <bn@niasdigital.com>
Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com>
2008-04-19 20:40:06 -04:00