Commit Graph

47 Commits

Author SHA1 Message Date
Linus Torvalds e6b5be2be4 Driver core patches for 3.19-rc1
Here's the set of driver core patches for 3.19-rc1.
 
 They are dominated by the removal of the .owner field in platform
 drivers.  They touch a lot of files, but they are "simple" changes, just
 removing a line in a structure.
 
 Other than that, a few minor driver core and debugfs changes.  There are
 some ath9k patches coming in through this tree that have been acked by
 the wireless maintainers as they relied on the debugfs changes.
 
 Everything has been in linux-next for a while.
 
 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'driver-core-3.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core

Pull driver core update from Greg KH:
 "Here's the set of driver core patches for 3.19-rc1.

  They are dominated by the removal of the .owner field in platform
  drivers.  They touch a lot of files, but they are "simple" changes,
  just removing a line in a structure.

  Other than that, a few minor driver core and debugfs changes.  There
  are some ath9k patches coming in through this tree that have been
  acked by the wireless maintainers as they relied on the debugfs
  changes.

  Everything has been in linux-next for a while"

* tag 'driver-core-3.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core: (324 commits)
  Revert "ath: ath9k: use debugfs_create_devm_seqfile() helper for seq_file entries"
  fs: debugfs: add forward declaration for struct device type
  firmware class: Deletion of an unnecessary check before the function call "vunmap"
  firmware loader: fix hung task warning dump
  devcoredump: provide a one-way disable function
  device: Add dev_<level>_once variants
  ath: ath9k: use debugfs_create_devm_seqfile() helper for seq_file entries
  ath: use seq_file api for ath9k debugfs files
  debugfs: add helper function to create device related seq_file
  drivers/base: cacheinfo: remove noisy error boot message
  Revert "core: platform: add warning if driver has no owner"
  drivers: base: support cpu cache information interface to userspace via sysfs
  drivers: base: add cpu_device_create to support per-cpu devices
  topology: replace custom attribute macros with standard DEVICE_ATTR*
  cpumask: factor out show_cpumap into separate helper function
  driver core: Fix unbalanced device reference in drivers_probe
  driver core: fix race with userland in device_add()
  sysfs/kernfs: make read requests on pre-alloc files use the buffer.
  sysfs/kernfs: allow attributes to request write buffer be pre-allocated.
  fs: sysfs: return EGBIG on write if offset is larger than file size
  ...
2014-12-14 16:10:09 -08:00
Alexander Stein 0481845401 ALSA: atmel_abdac: Add missing clock prepare
Clocks must be prepared before enabling them. Do this in one step.
Replace clk_enable with clk_prepare_enable and clk_disable with
clk_disable_unprepare.

Signed-off-by: Alexander Stein <alexanders83@web.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2014-12-05 20:36:13 +01:00
Alexander Stein 1132015b16 ALSA: sound/atmel/ac97c.c: Add missing clock prepare
Clocks must be prepared before enabling them. Do this in one step.
Replace clk_enable with clk_prepare_enable and clk_disable with
clk_disable_unprepare. This fixes the following warning:
------------[ cut here ]------------
WARNING: CPU: 0 PID: 1 at drivers/clk/clk.c:895 __clk_enable+0x24/0x9c()
Modules linked in:
CPU: 0 PID: 1 Comm: swapper Tainted: G        W      3.18.0-rc7+ #245
[<c000dce8>] (unwind_backtrace) from [<c000bcf0>] (show_stack+0x10/0x14)
[<c000bcf0>] (show_stack) from [<c001664c>] (warn_slowpath_common+0x60/0x80)
[<c001664c>] (warn_slowpath_common) from [<c00166fc>] (warn_slowpath_null+0x18/0x20)
[<c00166fc>] (warn_slowpath_null) from [<c02fd7ac>] (__clk_enable+0x24/0x9c)
[<c02fd7ac>] (__clk_enable) from [<c02fdbb4>] (clk_enable+0x18/0x2c)
[<c02fdbb4>] (clk_enable) from [<c0322688>] (atmel_ac97c_probe+0x154/0x694)
[<c0322688>] (atmel_ac97c_probe) from [<c0235e08>] (platform_drv_probe+0x48/0x94)
[<c0235e08>] (platform_drv_probe) from [<c02345f8>] (driver_probe_device+0x138/0x350)
[<c02345f8>] (driver_probe_device) from [<c02348bc>] (__driver_attach+0x68/0x8c)
[<c02348bc>] (__driver_attach) from [<c0232bd0>] (bus_for_each_dev+0x70/0x84)
[<c0232bd0>] (bus_for_each_dev) from [<c0233cd8>] (bus_add_driver+0xfc/0x1f8)
[<c0233cd8>] (bus_add_driver) from [<c0234f0c>] (driver_register+0x9c/0xe0)
[<c0234f0c>] (driver_register) from [<c0008ac4>] (do_one_initcall+0x110/0x1c8)
[<c0008ac4>] (do_one_initcall) from [<c053cd58>] (kernel_init_freeable+0xf8/0x1b8)
[<c053cd58>] (kernel_init_freeable) from [<c03c0414>] (kernel_init+0x8/0xe4)
[<c03c0414>] (kernel_init) from [<c00096d0>] (ret_from_fork+0x14/0x24)
---[ end trace cb88537fdc8fa201 ]---
atmel_ac97c fffa0000.sound: AC'97 0 does not respond - RESET
atmel_ac97c fffa0000.sound: AC'97 0 access is not valid [0xffffffff], removing mixer.
------------[ cut here ]------------

Signed-off-by: Alexander Stein <alexanders83@web.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2014-12-05 20:36:01 +01:00
Alexander Stein ca460cc250 ALSA: sound/atmel/ac97c.c: Fix device index for pcm
chip->pdev->id is -1 by default. This is an invalid index resulting in
device file names like /dev/snd/pcmC0D-1p.

Signed-off-by: Alexander Stein <alexanders83@web.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2014-12-05 17:40:37 +01:00
Wolfram Sang 16573a98e1 ALSA: atmel: drop owner assignment from platform_drivers
A platform_driver does not need to set an owner, it will be populated by the
driver core.

Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2014-10-20 16:21:59 +02:00
Andy Shevchenko 3d588f83e4 dmaengine: dw: split dma-dw.h to platform and private parts
The introduced include/linux/dma/dw.h is going to contain the private
extensions and structures which are shared for dw_dmac users in the kernel.
Meanwhile include/linux/platform_data/dma-dw.h keeps only platform related data
types and definitions.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2014-10-15 20:31:04 +05:30
Andy Shevchenko 3d598f47e8 dmaengine: dw: move dw_dmac.h to where it belongs to
There is a common storage for platform data related structures and definitions
inside kernel source tree. The patch moves file from include/linux to
include/linux/platform_data and renames it acoordingly. The users are also
updated.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
[For the arch/avr32/.* and .*sound/atmel.*]
Acked-by: Hans-Christian Egtvedt <egtvedt@samfundet.no>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2014-09-11 11:48:12 +05:30
Alexander Stein 4b973ee056 ALSA: sound/atmel/ac97c.c: Convert to module_platform_driver
This reduces some boilerplate code.

Signed-off-by: Alexander Stein <alexanders83@web.de>
Acked-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2014-04-16 10:22:03 +02:00
Takashi Iwai a4f2473d39 ALSA: atmel: Convert to snd_card_new() with a device pointer
Also remove superfluous snd_card_set_dev() calls.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
2014-02-14 08:14:04 +01:00
Takashi Iwai d09476018b Merge branch 'for-linus' into for-next 2013-12-16 15:53:52 +01:00
Paul Walmsley 337bb336b9 ALSA: atmel_abdac: clk_round_rate() can return a zero upon error
Treat both negative and zero return values from clk_round_rate()
as errors.  This is needed since subsequent patches will convert
clk_round_rate()'s return value to be an unsigned type, rather
than a signed type, since some clock sources can generate rates higher
than (2^31)-1 Hz.

Eventually, when calling clk_round_rate(), only a return value of
zero will be considered a error; all other values will be
considered valid rates.  The comparison against values less than
0 is kept to preserve the correct behavior in the meantime.

Signed-off-by: Paul Walmsley <pwalmsley@nvidia.com>
Acked-by: Hans-Christian Egtvedt <egtvedt@samfundet.no>
Cc: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2013-12-10 21:19:49 +01:00
Takashi Iwai e4de211cd3 ALSA: atmel: Fix possible array overflow
The static checker found a possible array overflow in atmel/abdac.c:
  static checker warning: "sound/atmel/abdac.c:373 set_sample_rates()
        error: buffer overflow 'dac->rates' 6 <= 6"

This patch papers over the buggy point, by ensuring that dac->rates[]
update not overflowing the actual array size.

Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2013-12-02 15:10:41 +01:00
Linus Walleij a1c22cdc77 ALSA: atmel: remove dependency on <mach/gpio.h>
This include is completely unused since the AT91 sound driver
actually uses gpiolib properly.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2013-11-05 13:43:25 +01:00
Sachin Kamat 9ea6cfbc2a ALSA: atmel: Remove redundant platform_set_drvdata()
Commit 0998d06310 (device-core: Ensure drvdata = NULL when no
driver is bound) removes the need to set driver data field to
NULL.

Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org>
Acked-by: Hans-Christian Egtvedt <egtvedt@samfundet.no>
Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2013-05-03 11:40:23 +02:00
Eldad Zack 74c34ca1cc ALSA: pcm_format_to_bits strong-typed conversion
Add a function to handle conversion from snd_pcm_format_t
to bitwise with proper typing.

Change such conversions to use this function and silence sparse
warnings.

Signed-off-by: Eldad Zack <eldad@fogrefinery.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2013-04-29 13:36:15 +02:00
Bill Pemberton 61dc674c3b ALSA: atmel: remove __dev* attributes
CONFIG_HOTPLUG is going away as an option.  As result the __dev*
markings will be going away.

Remove use of __devinit, __devexit_p, __devinitdata, __devinitconst,
and __devexit.

Signed-off-by: Bill Pemberton <wfp5p@virginia.edu>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2012-12-07 07:22:12 +01:00
Julia Lawall 0c23e46eb4 ALSA: sound/atmel/ac97c.c: fix error return code
In the first case, the second test of whether retval is negative is
redundant.  It is dropped and the previous and subsequent tests are
combined.

In the second case, add an initialization of retval on failure of ioremap.

A simplified version of the semantic match that finds this problem is as
follows: (http://coccinelle.lip6.fr/)

// <smpl>
(
if@p1 (\(ret < 0\|ret != 0\))
 { ... return ret; }
|
ret@p1 = 0
)
... when != ret = e1
    when != &ret
*if(...)
{
  ... when != ret = e2
      when forall
 return ret;
}

// </smpl>

Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2012-08-20 10:56:01 +02:00
Julia Lawall aaf265c22e ALSA: sound/atmel/abdac.c: fix error return code
Initialize retval before returning from a failed call to ioremap.

A simplified version of the semantic match that finds this problem is as
follows: (http://coccinelle.lip6.fr/)

// <smpl>
(
if@p1 (\(ret < 0\|ret != 0\))
 { ... return ret; }
|
ret@p1 = 0
)
... when != ret = e1
    when != &ret
*if(...)
{
  ... when != ret = e2
      when forall
 return ret;
}

// </smpl>

Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2012-08-20 10:53:13 +02:00
Takashi Iwai d34e4e00ad ALSA: platform: Check CONFIG_PM_SLEEP instead of CONFIG_PM
When CONFIG_PM is set but CONFIG_PM_SLEEP is unset,
SIMPLE_DEV_PM_OPS() ignores the given functions, and this leads to
compile warnings.

For avoiding this, simply check CONFIG_PM_SLEEP instead of CONFIG_PM.

Reported-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2012-08-09 15:47:15 +02:00
Takashi Iwai 284e7ca75f ALSA: convert PM ops of platform_driver to new pm ops
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2012-07-03 07:58:19 +02:00
Takashi Iwai 8bf01d8abc ALSA: Add missing .owner=THIS_MODULE to platform_driver definitions
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2012-07-02 17:50:05 +02:00
Bo Shen b2522f9262 ALSA: atmel/ac97c: correct the unexpected behavior when using uninitial value for reset pin
When pdata->reset_pin is passed with a negative value (means gpio
is invalid), then chip->reset_pin will not be assigned to a vaule,
it will use default value 0. This will cause unexpected behavior.

So, add this patch to correct.

Signed-off-by: Bo Shen <voice.shen@atmel.com>
Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2012-05-11 12:10:04 +02:00
Viresh Kumar e2b35f3dbf dmaengine/dw_dmac: Fix dw_dmac user drivers to adapt to slave_config changes
There are few existing user drivers of dw_dmac. They will break as soon as we
remove unused fields from struct dw_dma_slave. This patch focuses to fix these
user drivers to use dma_slave_config() routine.

Signed-off-by: Viresh Kumar <viresh.kumar@st.com>
Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
2012-02-22 18:15:39 +05:30
Linus Torvalds 57f2685c16 Merge branch 'next' of git://git.infradead.org/users/vkoul/slave-dma
* 'next' of git://git.infradead.org/users/vkoul/slave-dma: (53 commits)
  ARM: mach-shmobile: specify CHCLR registers on SH7372
  dma: shdma: fix runtime PM: clear channel buffers on reset
  dma/imx-sdma: save irq flags when use spin_lock in sdma_tx_submit
  dmaengine/ste_dma40: clear LNK on channel startup
  dmaengine: intel_mid_dma: remove legacy pm interface
  ASoC: mxs: correct 'direction' of device_prep_dma_cyclic
  dmaengine: intel_mid_dma: error path fix
  dmaengine: intel_mid_dma: locking and freeing fixes
  mtd: gpmi-nand: move to dma_transfer_direction
  mtd: fix compile error for gpmi-nand
  mmc: mxs-mmc: fix the dma_transfer_direction migration
  dmaengine: add DMA_TRANS_NONE to dma_transfer_direction
  dma: mxs-dma: Don't use CLKGATE bits in CTRL0 to disable DMA channels
  dma: mxs-dma: make mxs_dma_prep_slave_sg() multi user safe
  dma: mxs-dma: Always leave mxs_dma_init() with the clock disabled.
  dma: mxs-dma: fix a typo in comment
  DMA: PL330: Remove pm_runtime_xxx calls from pl330 probe/remove
  video i.MX IPU: Fix display connections
  i.MX IPU DMA: Fix wrong burstsize settings
  dmaengine/ste_dma40: allow fixed physical channel
  ...

Fix up conflicts in drivers/dma/{Kconfig,mxs-dma.c,pl330.c}

The conflicts looked pretty trivial, but I'll ask people to verify them.
2012-01-17 18:40:24 -08:00
Bo Shen 8015e3defe ALSA: atmel/ac97c: using software reset instead hardware reset if not available
Signed-off-by: Bo Shen <voice.shen@atmel.com>
Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2011-12-19 11:27:41 +01:00
Vinod Koul 35e16581ed sound-soc: move to dma_transfer_direction
fixup usage of dma direction by introducing dma_transfer_direction,
this patch moves asoc drivers to use new enum

Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
Cc: Liam Girdwood <lrg@ti.com>
Cc: Mark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
2011-10-31 09:40:27 +05:30
Jiri Kosina b7e9c223be Merge branch 'master' into for-next
Sync with Linus' tree to be able to apply pending patches that
are based on newer code already present upstream.
2011-07-11 14:15:55 +02:00
Hans-Christian Egtvedt 0cfae7c937 ALSA: atmel - update author email for ABDAC, AC97C and AT73C213
This patch updates the email address of the sound drivers supported by me to an
email account I will use on a more regular basis in the future.

Signed-off-by: Hans-Christian Egtvedt <hans-christian.egtvedt@atmel.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2011-06-28 16:56:07 +02:00
Joe Perches 28f65c11f2 treewide: Convert uses of struct resource to resource_size(ptr)
Several fixes as well where the +1 was missing.

Done via coccinelle scripts like:

@@
struct resource *ptr;
@@

- ptr->end - ptr->start + 1
+ resource_size(ptr)

and some grep and typing.

Mostly uncompiled, no cross-compilers.

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2011-06-10 14:55:36 +02:00
Hans-Christian Egtvedt fd76804f3f ALSA: fix invalid hardware.h include in ac97c for AVR32 architecture
This patch fixes the non-compiling AC97C driver for AVR32 architecture by
include mach/hardware.h only for AT91 architecture. The AVR32 architecture does
not supply the hardware.h include file.

Signed-off-by: Hans-Christian Egtvedt <hans-christian.egtvedt@atmel.com>
CC: stable@kernel.org
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2011-01-25 18:07:10 +01:00
Takashi Iwai 1beded5d9c ALSA: atmel - Fix the return value in error path
In the commit c0763e687d
    ALSA: snd-atmel-abdac: test wrong variable
the return value via PTR_ERR() had to be fixed as well.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
2010-11-22 10:57:17 +01:00
Vasiliy Kulikov c0763e687d ALSA: snd-atmel-abdac: test wrong variable
After clk_get() pclk is checked second time instead of sample_clk check.

Signed-off-by: Vasiliy Kulikov <segoon@openwall.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2010-11-22 10:56:53 +01:00
Yegor Yefremov f534116308 ALSA: atmel: set "channel A event" output to debug
Signed-off-by: Yegor Yefremov <yegorslists@googlemail.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2010-06-08 16:42:02 +02:00
Sedji Gaouaou ec2755a93d ALSA: AC97: add full duplex support for atmel AT91 and AVR.
This patch add full duplex support on AT91 and AVR.
It was a bug: we needed to check first if there are some chips opened so we
could enable both reception and sending of the data.

Signed-off-by: Sedji Gaouaou <sedji.gaouaou@atmel.com>
Acked-by: Liam Girdwood <lrg@slimlogic.co.uk>
Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2010-03-25 20:22:36 +01:00
Sedji Gaouaou 7177395fdd ALSA: AC97: add AC97 support for AT91.
This patch add AC97 support for ATMEL AT91, using the AVR32 code.
While AVR is using a DMA, the AT91 chips are using a Peripheral Data
Controller.

Signed-off-by: Sedji Gaouaou <sedji.gaouaou@atmel.com>
Acked-by: Liam Girdwood <lrg@slimlogic.co.uk>
Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2010-03-25 20:22:15 +01:00
Hans-Christian Egtvedt fa075ed2dc ALSA: snd-atmel-abdac: increase periods_min to 6 instead of 4
This patch increases periods_min to 6 from 4, this will remove any
hickups where the buffer is not filled fast enough from user space.

Signed-off-by: Hans-Christian Egtvedt <hans-christian.egtvedt@atmel.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2009-04-06 03:56:28 +02:00
Hans-Christian Egtvedt 60a56cce7a ALSA: snd-atmel-abdac: replace bus_id with dev_name()
This patch replaces the references to bus_id to the new dev_name() API.

Signed-off-by: Hans-Christian Egtvedt <hans-christian.egtvedt@atmel.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2009-04-06 03:56:11 +02:00
Hans-Christian Egtvedt 23572856e0 ALSA: snd-atmel-ac97c: replace bus_id with dev_name()
This patch replaces the references to bus_id to the new dev_name() API.

Signed-off-by: Hans-Christian Egtvedt <hans-christian.egtvedt@atmel.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2009-04-06 03:55:59 +02:00
Hans-Christian Egtvedt bd74a1843e ALSA: snd-atmel-ac97c: cleanup registers when removing driver
This patch will set the channel A and control channel mode register to
zero before disabling the AC97C peripheral.

Signed-off-by: Hans-Christian Egtvedt <hans-christian.egtvedt@atmel.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2009-04-06 03:55:50 +02:00
Hans-Christian Egtvedt 81baf3a7f6 ALSA: snd-atmel-ac97c: do a proper reset of the external codec
This patch will enable the AC97C before resetting the external codec,
leaving the AC97C disabled will result in floating I/O lines that can
affect the reset procedure.

Signed-off-by: Hans-Christian Egtvedt <hans-christian.egtvedt@atmel.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2009-04-06 03:55:42 +02:00
Hans-Christian Egtvedt df163587ea ALSA: snd-atmel-ac97c: enable interrupts to catch events for error reporting
This patch will enable interrupts from AC97C and report about error
conditions that occurs.

On channel A both overrun and underrun will be enabled depending if
playback and/or capture are enabled. On the control channel the overrun
interrupt is enabled.

Signed-off-by: Hans-Christian Egtvedt <hans-christian.egtvedt@atmel.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2009-04-06 03:55:33 +02:00
Hans-Christian Egtvedt c42eec0f19 ALSA: snd-atmel-ac97c: set correct size for buffer hardware parameter
This patch will set a proper maximum bytes for the buffer, which is:
channels * bytes per sample * maximum periods * maximum bytes per period.

It also sets the minimum periods to 6, a value chosen from testing, with
a minimum of 6 periods the system has good time to fill in new audio
data without skipping.

Signed-off-by: Hans-Christian Egtvedt <hans-christian.egtvedt@atmel.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2009-04-06 03:55:15 +02:00
Hans-Christian Egtvedt 128ed6a926 ALSA: snd-atmel-ac97c: do not overwrite OCA and ICA when assigning channels
This patch will take care not to overwrite OCA and ICA registers when
assigning input and output channels. It will also make sure the
registers are at a known state when enabling a channel and clean up
properly in case of an error.

Signed-off-by: Hans-Christian Egtvedt <hans-christian.egtvedt@atmel.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2009-04-06 03:55:08 +02:00
Hans-Christian Egtvedt d54bb9f0c5 ALSA: snd-atmel-ac97c: remove dead break statements after return in switch case
Signed-off-by: Hans-Christian Egtvedt <hans-christian.egtvedt@atmel.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2009-04-06 03:54:56 +02:00
Hans-Christian Egtvedt 8321fc0113 ALSA: snd-atmel-ac97c: cleanup register definitions
This patch will remove traces of channel B registers, since they are not
used by the AC97C driver. Channel B might be used for other purposes.

The driver also adds channel status bits TXEMPTY and OVRUN and a
AC97C_CH_MASK macro to ease clearing a channel settings.

Signed-off-by: Hans-Christian Egtvedt <hans-christian.egtvedt@atmel.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2009-04-06 03:54:48 +02:00
Hans-Christian Egtvedt 4ede028f87 ALSA: Add ALSA driver for Atmel AC97 controller
This patch adds ALSA support for the AC97 controller found on Atmel
AVR32 devices.

Tested on ATSTK1006 + ATSTK1000 with a development board with a AC97
codec.

Signed-off-by: Hans-Christian Egtvedt <hans-christian.egtvedt@atmel.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2009-02-05 15:08:51 +01:00
Hans-Christian Egtvedt e4967d6016 ALSA: Add ALSA driver for Atmel Audio Bitstream DAC
This patch adds ALSA support for the Audio Bistream DAC found on Atmel
AVR32 devices. The ABDAC is an Atmel IP which might show up on AT91
devices in the future, hence making a generic driver which can be
utilized by AT91 arch if needed.

Datasheet describing the ABDAC peripheral is available in the AT32AP7000
datasheet, http://www.atmel.com/dyn/products/datasheets.asp?family_id=682

Tested on ATSTK1006 + ATSTK1000 with a class D amplifier stage.

Signed-off-by: Hans-Christian Egtvedt <hans-christian.egtvedt@atmel.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2009-02-05 15:08:48 +01:00