Commit Graph

4682 Commits

Author SHA1 Message Date
Andrea Righi
27ac792ca0 PAGE_ALIGN(): correctly handle 64-bit values on 32-bit architectures
On 32-bit architectures PAGE_ALIGN() truncates 64-bit values to the 32-bit
boundary. For example:

	u64 val = PAGE_ALIGN(size);

always returns a value < 4GB even if size is greater than 4GB.

The problem resides in PAGE_MASK definition (from include/asm-x86/page.h for
example):

#define PAGE_SHIFT      12
#define PAGE_SIZE       (_AC(1,UL) << PAGE_SHIFT)
#define PAGE_MASK       (~(PAGE_SIZE-1))
...
#define PAGE_ALIGN(addr)       (((addr)+PAGE_SIZE-1)&PAGE_MASK)

The "~" is performed on a 32-bit value, so everything in "and" with
PAGE_MASK greater than 4GB will be truncated to the 32-bit boundary.
Using the ALIGN() macro seems to be the right way, because it uses
typeof(addr) for the mask.

Also move the PAGE_ALIGN() definitions out of include/asm-*/page.h in
include/linux/mm.h.

See also lkml discussion: http://lkml.org/lkml/2008/6/11/237

[akpm@linux-foundation.org: fix drivers/media/video/uvc/uvc_queue.c]
[akpm@linux-foundation.org: fix v850]
[akpm@linux-foundation.org: fix powerpc]
[akpm@linux-foundation.org: fix arm]
[akpm@linux-foundation.org: fix mips]
[akpm@linux-foundation.org: fix drivers/media/video/pvrusb2/pvrusb2-dvb.c]
[akpm@linux-foundation.org: fix drivers/mtd/maps/uclinux.c]
[akpm@linux-foundation.org: fix powerpc]
Signed-off-by: Andrea Righi <righi.andrea@gmail.com>
Cc: <linux-arch@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-07-24 10:47:21 -07:00
Greg Kroah-Hartman
e282959ef3 device create: dvb: convert device_create to device_create_drvdata
device_create() is race-prone, so use the race-free
device_create_drvdata() instead as device_create() is going away.

Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2008-07-21 21:54:42 -07:00
Linus Torvalds
f894d18380 Merge git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/v4l-dvb
* git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/v4l-dvb: (277 commits)
  V4L/DVB (8415): gspca: Infinite loop in i2c_w() of etoms.
  V4L/DVB (8414): videodev/cx18: fix get_index bug and error-handling lock-ups
  V4L/DVB (8411): videobuf-dma-contig.c: fix 64-bit build for pre-2.6.24 kernels
  V4L/DVB (8410): sh_mobile_ceu_camera: fix 64-bit compiler warnings
  V4L/DVB (8397): video: convert select VIDEO_ZORAN_ZR36060 into depends on
  V4L/DVB (8396): video: Fix Kbuild dependency for VIDEO_IR_I2C
  V4L/DVB (8395): saa7134: Fix Kbuild dependency of ir-kbd-i2c
  V4L/DVB (8394): ir-common: CodingStyle fix: move EXPORT_SYMBOL_GPL to their proper places
  V4L/DVB (8393): media/video: Fix depencencies for VIDEOBUF
  V4L/DVB (8392): media/Kconfig: Convert V4L1_COMPAT select into "depends on"
  V4L/DVB (8390): videodev: add comment and remove magic number.
  V4L/DVB (8389): videodev: simplify get_index()
  V4L/DVB (8387): Some cosmetic changes
  V4L/DVB (8381): ov7670: fix compile warnings
  V4L/DVB (8380): saa7115: use saa7115_auto instead of saa711x as the autodetect driver name.
  V4L/DVB (8379): saa7127: Make device detection optional
  V4L/DVB (8378): cx18: move cx18_av_vbi_setup to av-core.c and rename to cx18_av_std_setup
  V4L/DVB (8377): ivtv/cx18: ensure the default control values are correct
  V4L/DVB (8376): cx25840: move cx25840_vbi_setup to core.c and rename to cx25840_std_setup
  V4L/DVB (8374): gspca: No conflict of 0c45:6011 with the sn9c102 driver.
  ...
2008-07-20 21:14:42 -07:00
Jean-Francois Moine
d20b27478d V4L/DVB (8415): gspca: Infinite loop in i2c_w() of etoms.
Signed-off-by: Jean-Francois Moine <moinejf@free.fr>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
2008-07-20 07:29:33 -03:00
Hans Verkuil
fac3639d88 V4L/DVB (8414): videodev/cx18: fix get_index bug and error-handling lock-ups
Fix a bug in get_index that was introduced earlier.
Also fix two error handling lock-ups in videodev and cx18 that
where found thanks to that bug.

Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
2008-07-20 07:29:27 -03:00
Hans Verkuil
f19ad39014 V4L/DVB (8411): videobuf-dma-contig.c: fix 64-bit build for pre-2.6.24 kernels
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
2008-07-20 07:29:22 -03:00
Hans Verkuil
86751b016f V4L/DVB (8410): sh_mobile_ceu_camera: fix 64-bit compiler warnings
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
2008-07-20 07:29:17 -03:00
Mauro Carvalho Chehab
af8b303e96 V4L/DVB (8397): video: convert select VIDEO_ZORAN_ZR36060 into depends on
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
2008-07-20 07:29:12 -03:00
Mauro Carvalho Chehab
367394ac5c V4L/DVB (8396): video: Fix Kbuild dependency for VIDEO_IR_I2C
Instead of letting VIDEO_IR_I2C to be selected by VIDEO_IR, if I2C, convert it
into a symbol that depends on both VIDEO_IR and I2C.

Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
2008-07-20 07:29:08 -03:00
Mauro Carvalho Chehab
1c22dad8ab V4L/DVB (8395): saa7134: Fix Kbuild dependency of ir-kbd-i2c
Currently, saa7134 is dependent of ir-kbd-i2c, since it uses a symbol that is
defined there. However, as this symbol is used only on saa7134, there's no
sense on keeping it defined there (or on ir-commons).

So, let's move it to saa7134 and remove one symbol for being exported.

Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
2008-07-20 07:29:03 -03:00
Mauro Carvalho Chehab
4db16db4f6 V4L/DVB (8394): ir-common: CodingStyle fix: move EXPORT_SYMBOL_GPL to their proper places
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
2008-07-20 07:28:59 -03:00
Mauro Carvalho Chehab
432aa3b64d V4L/DVB (8393): media/video: Fix depencencies for VIDEOBUF
VIDEOBUF_DVB depends on VIDEOBUF_CORE, not on VIDEOBUF_DMA_SG

Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
2008-07-20 07:28:54 -03:00
Mauro Carvalho Chehab
d4216488c0 V4L/DVB (8392): media/Kconfig: Convert V4L1_COMPAT select into "depends on"
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
2008-07-20 07:28:49 -03:00
Hans Verkuil
c3fb62bf92 V4L/DVB (8390): videodev: add comment and remove magic number.
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
2008-07-20 07:28:44 -03:00
Brandon Philips
8373a3e512 V4L/DVB (8389): videodev: simplify get_index()
Use Hans Verkuil's suggested method of implementing get_index which doesn't
depend on class_for_each_device and instead uses the video_device array. This
simplifies the code and reduces its memory footprint.

Signed-off-by: Brandon Philips <bphilips@suse.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
2008-07-20 07:28:39 -03:00
Hans Verkuil
2bc93aa304 V4L/DVB (8387): Some cosmetic changes
Those changes, together with some proper patches, will allow out-of-tree 
compilation for for kernels < 2.6.19

Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
2008-07-20 07:28:32 -03:00
Hans Verkuil
e3bf20de33 V4L/DVB (8381): ov7670: fix compile warnings
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Acked-by: Jonathan Corbet <corbet@lwn.net>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
2008-07-20 07:28:27 -03:00
Hans Verkuil
9edd350f51 V4L/DVB (8380): saa7115: use saa7115_auto instead of saa711x as the autodetect driver name.
Having an _auto suffix is less ambiguous than a 'saa711x' identifier.
It's also used like this in the saa7127 driver.

Thanks to Jean Delvare for suggesting this.

Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
2008-07-20 07:28:23 -03:00
Jean Delvare
5daed07401 V4L/DVB (8379): saa7127: Make device detection optional
The saa7127 driver supports all of SAA7126, SAA7127, SAA7128 and
SAA1729 devices. Declare all these devices, so that board drivers can
tell which device is present, instead of always relying on
auto-detection (which needs to write to the chip, eek!).

We still need the detection for ivtv, so a special device name
"saa7127_auto" can be used when the caller doesn't know exactly which
device is present.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
2008-07-20 07:28:17 -03:00
Hans Verkuil
03b52c36a3 V4L/DVB (8378): cx18: move cx18_av_vbi_setup to av-core.c and rename to cx18_av_std_setup
Same issue as for cx25840: this function sets up the standard timings
and has nothing to do with VBI setup.

Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
2008-07-20 07:28:12 -03:00
Hans Verkuil
ca130eef2c V4L/DVB (8377): ivtv/cx18: ensure the default control values are correct
For several MPEG controls and the volume control the default as returned
by VIDIOC_QUERYCTRL was incorrect and did not match the actual initial
value.

This is now fixed for cx18 and ivtv.

Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
2008-07-20 07:28:07 -03:00
Hans Verkuil
cb5aa1c62d V4L/DVB (8376): cx25840: move cx25840_vbi_setup to core.c and rename to cx25840_std_setup
cx25840_vbi_setup has nothing to do with setting up VBI, but everything
with setting up the standard. Move to cx25840-core.c and rename.

Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
2008-07-20 07:28:00 -03:00
Hans de Goede
5de39b2b1f V4L/DVB (8374): gspca: No conflict of 0c45:6011 with the sn9c102 driver.
The sn9c102 driver claims to support usb-ID 0x0c45:0x6011, which is
a sn9c102 with ov6650 sensor, but the sn9c102 driver does not support the
ov6650 sensor (tested). Also the sn9c102 driver claims to support usb-ID
0x0c45:0x603f, which is a sn9c102 with CISVF10 sensor, but the sn9c102
driver does not support the CISVF10 sensor (not tested).

Signed-off-by: Hans de Goede <j.w.r.degoede@hhs.nl>
Signed-off-by: Jean-Francois Moine <moinejf@free.fr>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
2008-07-20 07:27:52 -03:00
Hans de Goede
12ff91264c V4L/DVB (8373): gspca: Hue, saturation and contrast controls added for sn9c10x ovxxxx.
(does not work with ov6650)

Signed-off-by: Hans de Goede <j.w.r.degoede@hhs.nl>
Signed-off-by: Jean-Francois Moine <moinejf@free.fr>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
2008-07-20 07:27:46 -03:00
Hans de Goede
722103e390 V4L/DVB (8372): gspca: Small ov6650 fixes.
1) Don't change  the red and blue pre-gain's from their defaults
2) Actually make the powerline freq ctrl available to userspace

Signed-off-by: Hans de Goede <j.w.r.degoede@hhs.nl>
Signed-off-by: Jean-Francois Moine <moinejf@free.fr>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
2008-07-20 07:27:42 -03:00
Jean-Francois Moine
c91256c27b V4L/DVB (8371): gspca: Webcam 08ca:2050 added.
Signed-off-by: Jean-Francois Moine <moinejf@free.fr>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
2008-07-20 07:27:37 -03:00
Jean-Francois Moine
100f7f2a34 V4L/DVB (8370): gspca: Webcam 0461:0821 added.
Signed-off-by: Jean-Francois Moine <moinejf@free.fr>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
2008-07-20 07:27:32 -03:00
Jean-Francois Moine
1ff1e48442 V4L/DVB (8369): gspca: Bad initialization of sn9c102 ov7630.
Signed-off-by: Jean-Francois Moine <moinejf@free.fr>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
2008-07-20 07:27:28 -03:00
Andoni Zubimendi
d87616f5a5 V4L/DVB (8367): gspca: Light frequency filter / exposure / clean-up for sn9c103 ov7630.
Signed-off-by: Andoni Zubimendi <andoni.zubimendi@gmail.com>
Signed-off-by: Jean-Francois Moine <moinejf@free.fr>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
2008-07-20 07:27:24 -03:00
Hans de Goede
a975a5279e V4L/DVB (8366): gspca: Better code for ov6650 and ov7630.
sonixb:   Common code between ov6650 and ov7630.
          Fix brightness oscillation with ov6650 sensor.

Signed-off-by: Hans de Goede <j.w.r.degoede@hhs.nl>
Signed-off-by: Jean-Francois Moine <moinejf@free.fr>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
2008-07-20 07:27:19 -03:00
Hans de Goede
66f358211d V4L/DVB (8364): gspca: Support of powerline frequency for ov6650.
Signed-off-by: Hans de Goede <j.w.r.degoede@hhs.nl>
Signed-off-by: Jean-Francois Moine <moinejf@free.fr>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
2008-07-20 07:27:15 -03:00
Hans de Goede
5c6644f305 V4L/DVB (8363): gspca: Bad image size with spca501.
Signed-off-by: Hans de Goede <j.w.r.degoede@hhs.nl>
Signed-off-by: Jean-Francois Moine <moinejf@free.fr>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
2008-07-20 07:27:10 -03:00
Hans de Goede
c36260ee27 V4L/DVB (8362): gspca: Bad offset of the brightness sum in sn9c103 packets.
Signed-off-by: Jean-Francois Moine <moinejf@free.fr>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
2008-07-20 07:27:05 -03:00
Andoni Zubimendi
b7474cf9f6 V4L/DVB (8361): gspca: Bad check of i2c write to sn9c10x.
Signed-off-by: Andoni Zubimendi <andoni.zubimendi@gmail.com>
Signed-off-by: Jean-Francois Moine <moinejf@free.fr>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
2008-07-20 07:27:01 -03:00
Andoni Zubimendi
794af52a4c V4L/DVB (8360): gspca: Bad initialization of sn9c103 - ov7630.
Signed-off-by: Andoni Zubimendi <andoni.zubimendi@gmail.com>
Signed-off-by: Jean-Francois Moine <moinejf@free.fr>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
2008-07-20 07:26:56 -03:00
Mauro Carvalho Chehab
9a97a2abe4 V4L/DVB (8359): gspca: Adds register aliases for zc03xx registers
Thanks to http://zc0302.sourceforge.net/zc0302.php, we have some hints
about what each zc3xx register means.

Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
Signed-off-by: Jean-Francois Moine <moinejf@free.fr>
2008-07-20 07:26:49 -03:00
Jean-Francois Moine
568788a771 V4L/DVB (8358): gspca: Better initialization of sn9c120 - ov7660.
Signed-off-by: Jean-Francois Moine <moinejf@free.fr>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
2008-07-20 07:26:43 -03:00
Hans de Goede
f4d520258d V4L/DVB (8357): gspca: Perfect exposure for sn9c10x, sensor ov6650.
Signed-off-by: Hans de Goede <j.w.r.degoede@hhs.nl>
Signed-off-by: Jean-Francois Moine <moinejf@free.fr>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
2008-07-20 07:26:37 -03:00
Hans de Goede
3647fea840 V4L/DVB (8356): gspca: 352x288 mode fix and source clean-up for Sonix bridges.
sonixb:   Bad initialization of sensor for 352x288 mode.
                (from Hans de Goede)
sonixj:   Clean-up source.

Signed-off-by: Hans de Goede <j.w.r.degoede@hhs.nl>
Signed-off-by: Jean-Francois Moine <moinejf@free.fr>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
2008-07-20 07:26:33 -03:00
Hans de Goede
ad5ef80dd7 V4L/DVB (8354): gspca: Better gain for bridge sn9c10x - sensor ov6650.
sonixb:   Better gain for ov6650.

Signed-off-by: Hans de Goede <j.w.r.degoede@hhs.nl>
Signed-off-by: Jean-Francois Moine <moinejf@free.fr>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
2008-07-20 07:26:28 -03:00
Andoni Zubimendi
4b972d29bb V4L/DVB (8353): gspca: 640x480 for bridge sn9c103 / sensor ov7630.
sonixb:   640x480 mode for sn9c103 - ov7630.

Signed-off-by: Andoni Zubimendi <andoni.zubimendi@gmail.com>
Signed-off-by: Jean-Francois Moine <moinejf@free.fr>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
2008-07-20 07:26:24 -03:00
Jean-Francois Moine
739570bb21 V4L/DVB (8352): gspca: Buffers for USB exchanges cannot be in the stack.
gspca:    Protect dq_callback() against simultaneous USB exchanges.
          Temporary buffer for USB exchanges added in the device struct.
(all)     Use a temporary buffer for all USB exchanges.

Signed-off-by: Jean-Francois Moine <moinejf@free.fr>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
2008-07-20 07:26:14 -03:00
Jean-Francois Moine
5b77ae7776 V4L/DVB (8350): gspca: Conform to v4l2 spec and mutex unlock fix.
gspca:    Empty the application queues on streamoff ioctl.
          streamon/off and qbuf ioctls may be done by any application.
          Don't handle MJPEG pixel format as JPEG.
                (thanks to Hans de Goede)
          Authorize reqbufs ioctl when streaming.
          Bad mutex unlock in poll() when streaming problem.
                (thanks to Mauro Carvalho Chehab)
          Don't handle 'webcam disconnected' in stream off.

Signed-off-by: Jean-Francois Moine <moinejf@free.fr>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
2008-07-20 07:26:09 -03:00
Andoni Zubimendi
51fc8e3bc0 V4L/DVB (8349): gspca: SN9C103 OV7630 fixes in sonixb.
Signed-off-by: Andoni Zubimendi <andoni.zubimendi@gmail.com>
Signed-off-by: Jean-Francois Moine <moinejf@free.fr>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
2008-07-20 07:26:04 -03:00
Hans de Goede
dcef3237b6 V4L/DVB (8348): gspca: Add auto gain/exposure to sonixb and tas5110 / ov6650 sensors.
sonixb:   Do auto gain for tas5110 / ov6650 sensors.
pac207:   Move the auto_gain function to gspca.
gspca:    New function gspca_auto_gain_n_exposure().

Signed-off-by: Hans de Goede <j.w.r.degoede@hhs.nl>
Signed-off-by: Jean-Francois Moine <moinejf@free.fr>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
2008-07-20 07:25:59 -03:00
Jean-Francois Moine
d0d0e39bc5 V4L/DVB (8346): gspca: Bad pixel format of bridge VC0321.
vc032x:   Light frequency was not initialized.
          Change the pixel format of bridge VC0321 to V4L2_PIX_FMT_YUV420
              ('YU12').
          Set a bridge to all webcams.

Signed-off-by: Jean-Francois Moine <moinejf@free.fr>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
2008-07-20 07:25:54 -03:00
Magnus Damm
326c986207 V4L/DVB (8343): soc_camera_platform: Add SoC Camera Platform driver
This patch adds a simple platform camera device. Useful for testing
cameras with SoC camera host drivers. Only one single pixel format
and resolution combination is supported.

Signed-off-by: Magnus Damm <damm@igel.co.jp>
Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@pengutronix.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
2008-07-20 07:25:49 -03:00
Magnus Damm
0d3244d643 V4L/DVB (8342): sh_mobile_ceu_camera: Add SuperH Mobile CEU driver V3
This is V3 of the SuperH Mobile CEU soc_camera driver.

The CEU hardware block is configured in a transparent data fetch
mode, frames are captured from the attached camera and written to
physically contiguous memory buffers provided by the newly added
videobuf-dma-contig queue. Tested on sh7722 and sh7723 processors.

 Changes since V2:
 - remove SUPERH Kconfig dependency
 - move sh_mobile_ceu.h to include/media
 - add board callback support with enable_camera()/disable_camera()
 - add support for declare_coherent_memory
 - rework video memory limit
 - more verbose error messages

 Changes since V1:
 - fixed the CEU driver to work with the newly updated patches

Signed-off-by: Magnus Damm <damm@igel.co.jp>
Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@pengutronix.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
2008-07-20 07:25:43 -03:00
Magnus Damm
2cc45cf25a V4L/DVB (8341): videobuf: Add physically contiguous queue code V3
This is V3 of the physically contiguous videobuf queues patch.
Useful for hardware such as the SuperH Mobile CEU which doesn't
support scatter gatter bus mastering.

Since it may be difficult to allocate large chunks of physically
contiguous memory after some uptime due to fragmentation, this code
allocates memory using dma_alloc_coherent(). Architectures supporting
dma_declare_coherent_memory() can easily avoid fragmentation issues
by using dma_declare_coherent_memory() to force dma_alloc_coherent()
to allocate from a certain pre-allocated memory area.

 Changes since V2
  - use dma_handle for physical address
  - use "scatter gather" instead of "scatter gatter"

 Changes since V1:
  - use dev_err() instead of pr_err()
  - remember size in struct videobuf_dma_contig_memory
  - keep struct videobuf_dma_contig_memory in .c file
  - let videobuf_to_dma_contig() return dma_addr_t
  - implement __videobuf_sync()
  - return statements, white space and other minor fixes

Signed-off-by: Magnus Damm <damm@igel.co.jp>
Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@pengutronix.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
2008-07-20 07:25:37 -03:00
Magnus Damm
5d6aaf50e2 V4L/DVB (8340): videobuf: Fix gather spelling
Use "scatter gather" instead of "scatter gatter".

Signed-off-by: Magnus Damm <damm@igel.co.jp>
Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@pengutronix.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
2008-07-20 07:25:32 -03:00