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* Merge branch 'for_linus' of ↵Linus Torvalds2008-10-13
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-2.6 * 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-2.6: (313 commits) V4L/DVB (9186): Added support for Prof 7300 DVB-S/S2 cards V4L/DVB (9185): S2API: Ensure we have a reasonable ROLLOFF default V4L/DVB (9184): cx24116: Change the default SNR units back to percentage by default. V4L/DVB (9183): S2API: Return error of the caller provides 0 commands. V4L/DVB (9182): S2API: Added support for DTV_HIERARCHY V4L/DVB (9181): S2API: Add support fot DTV_GUARD_INTERVAL and DTV_TRANSMISSION_MODE V4L/DVB (9180): S2API: Added support for DTV_CODE_RATE_HP/LP V4L/DVB (9179): S2API: frontend.h cleanup V4L/DVB (9178): cx24116: Add module parameter to return SNR as ESNO. V4L/DVB (9177): S2API: Change _8PSK / _16APSK to PSK_8 and APSK_16 V4L/DVB (9176): Add support for DvbWorld USB cards with STV0288 demodulator. V4L/DVB (9175): Remove NULL pointer in stb6000 driver. V4L/DVB (9174): Allow custom inittab for ST STV0288 demodulator. V4L/DVB (9173): S2API: Remove the hardcoded command limit during validation V4L/DVB (9172): S2API: Bugfix related to DVB-S / DVB-S2 tuning for the legacy API. V4L/DVB (9171): S2API: Stop an OOPS if illegal commands are dumped in S2API. V4L/DVB (9170): cx24116: Sanity checking to data input via S2API to the cx24116 demod. V4L/DVB (9169): uvcvideo: Support two new Bison Electronics webcams. V4L/DVB (9168): Add support for MSI TV@nywhere Plus remote V4L/DVB: v4l2-dev: remove duplicated #include ...
| * V4L/DVB (9185): S2API: Ensure we have a reasonable ROLLOFF defaultDarron Broad2008-10-13
| | | | | | | | | | | | | | | | Non-initialised cache values get a reasonble default. Signed-off-by: Darron Broad <darron@kewl.org> Signed-off-by: Steven Toth <stoth@linuxtv.org> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
| * V4L/DVB (9182): S2API: Added support for DTV_HIERARCHYSteven Toth2008-10-13
| | | | | | | | | | | | | | | | A user tuning DVB-T via the S2API reports that this was not implemented, and his tuning was failing. Signed-off-by: Steven Toth <stoth@linuxtv.org> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
| * V4L/DVB (9181): S2API: Add support fot DTV_GUARD_INTERVAL and ↵Steven Toth2008-10-13
| | | | | | | | | | | | | | | | | | DTV_TRANSMISSION_MODE Tuning DVB-T via the S2API was failing, missing some essential items. Signed-off-by: Steven Toth <stoth@linuxtv.org> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
| * V4L/DVB (9180): S2API: Added support for DTV_CODE_RATE_HP/LPSteven Toth2008-10-13
| | | | | | | | | | | | | | | | Reports from users that using the new API for tuning DTV was failing, and the cache was missing some essential items. Signed-off-by: Steven Toth <stoth@linuxtv.org> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
| * V4L/DVB (9179): S2API: frontend.h cleanupBrandon Philips2008-10-13
| | | | | | | | | | | | | | | | | | Reviewing the code briefly and saw this. You can't change more than DTV_IOCTL_MAX_MSGS at once, not 16. Signed-off-by: Brandon Philips <bphilips@suse.de> Signed-off-by: Steven Toth <stoth@linuxtv.org> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
| * V4L/DVB (9177): S2API: Change _8PSK / _16APSK to PSK_8 and APSK_16Steven Toth2008-10-13
| | | | | | | | | | | | | | | | | | ... and cleanup any drivers using them. I've also removed NBC_QPSK and modified the cx24116 driver to check the delivery_type also, removing some excess namespace baggage. Signed-off-by: Steven Toth <stoth@linuxtv.org> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
| * V4L/DVB (9173): S2API: Remove the hardcoded command limit during validationSteven Toth2008-10-13
| | | | | | | | | | | | | | | | | | This means that when developers add new commands then they'll be see the DTV_MAX_COMMAND define and will be more likely to modify it, without having to modify the command validation code. Signed-off-by: Steven Toth <stoth@linuxtv.org> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
| * V4L/DVB (9168): Add support for MSI TV@nywhere Plus remoteBrian Rogers2008-10-13
| | | | | | | | | | | | | | | | | | | | | | The IR controller has a couple quirks. It won't respond until some other device on the bus is probed. To work around that, probe 0x50 first. Then, since it won't respond to a zero-byte read, probe with a one-byte read. Signed-off-by: Brian Rogers <brian_rogers@comcast.net> [mchehab.redhat.com: Fix merge conflicts and remove an unused var] Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
| * V4L/DVB (9160): v4l: remove vidioc_enum_fmt_vbi_capHans Verkuil2008-10-13
| | | | | | | | | | | | | | | | | | Remove the vidioc_enum_fmt_vbi_cap ops: it was scheduled for removal in 2.6.28 since the v4l2 specification says that V4L2_BUF_TYPE_VBI_CAPTURE should not support VIDIOC_ENUM_FMT. It's also pretty pointless. Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
| * V4L/DVB (9133): v4l: disconnect kernel number from minorHans Verkuil2008-10-12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The v4l core creates four different video devices (video, vbi, radio, vtx) and each has its own range of minor numbers. However, modern devices keep increasing the number of devices that they need so a maximum of 64 video devices will not be enough in the future. In addition this scheme makes it very hard to add new device types. This patch disconnects the kernel number allocation (e.g. video0, video1, etc.) from the actual minor number (just pick the first free minor). This allows for much more flexibility in the future. However, it does require the use of udev. For those who cannot use udev a new CONFIG option was created that changes the allocation scheme back to the old behavior. Thanks to Greg KH for suggesting this approach during the 2008 LPC. In addition, several bugs were fixed in the ivtv and cx18 drivers: these drivers try to allocate specific kernel numbers but that scheme contained a bug which caused what should have been e.g. video17 to appear as e.g. video2. Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
| * V4L/DVB (9072): S2API: Add DTV_API_VERSION commandSteven Toth2008-10-12
| | | | | | | | | | | | | | | | | | This allows application developers to query the dvb-core API version dynamically, helping developers understand whether certain features will be available. Signed-off-by: Steven Toth <stoth@linuxtv.org> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
| * V4L/DVB (9071): S2API: Implement result codes for individual commandsSteven Toth2008-10-12
| | | | | | | | | | | | | | | | This allows application developers to determine which particular command in a sequence is invalid, or failing with error. Signed-off-by: Steven Toth <stoth@linuxtv.org> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
| * V4L/DVB (9070): S2API: Removed the typedef for the commands, used defines ↵Steven Toth2008-10-12
| | | | | | | | | | | | | | instead. Signed-off-by: Steven Toth <stoth@linuxtv.org> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
| * V4L/DVB (9061): saa7134: Add support for Real Audio 220Mauro Carvalho Chehab2008-10-12
| | | | | | | | | | | | | | | | Thanks to Sistema Fenix (http://www.sistemafenix.com.br/) for sponsoring this development. Signed-off-by: Gilberto <gilberto@sistemafenix.com.br> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
| * V4L/DVB (9060): saa7134: Add support for Avermedia PCI pure analog (M135A)Mauro Carvalho Chehab2008-10-12
| | | | | | | | | | | | | | | | Thanks to Sistema Fenix (http://www.sistemafenix.com.br/) for sponsoring this development. Signed-off-by: Gilberto <gilberto@sistemafenix.com.br> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
| * V4L/DVB (9059): saa7134: Add support for Encore version 5.3 boardMauro Carvalho Chehab2008-10-12
| | | | | | | | | | | | | | | | Thanks to Sistema Fenix (http://www.sistemafenix.com.br/) for sponsoring this development. Signed-off-by: Gilberto <gilberto@sistemafenix.com.br> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
| * V4L/DVB (9049): convert tuner drivers to use dvb_frontend->callbackMichael Krufky2008-10-12
| | | | | | | | | | Signed-off-by: Michael Krufky <mkrufky@linuxtv.org> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
| * V4L/DVB (9025): S2API: Deactivate the ISDB-T definitionsSteven Toth2008-10-12
| | | | | | | | | | | | | | | | | | We don't want to push the ISDB-T definitions into the kernel until we have a high level of confidence in the ISDB-T API. More testing is required before this code is released. Signed-off-by: Steven Toth <stoth@linuxtv.org> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
| * V4L/DVB (9024): S2API: Cleanup dtv_property remove unwanted fields.Steven Toth2008-10-12
| | | | | | | | | | Signed-off-by: Steven Toth <stoth@linuxtv.org> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
| * V4L/DVB (9007): S2API: Changed bandwidth to be expressed in HZSteven Toth2008-10-12
| | | | | | | | | | | | | | | | | | Also added some compat code for the older API. Added more ISDB message/command suggestions, current not connected in dvb-core. Signed-off-by: Steven Toth <stoth@linuxtv.org> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
| * V4L/DVB (9003): S2API: Remove the DTV_SET_ and DTV_GET_ prefixesSteven Toth2008-10-12
| | | | | | | | | | | | | | | | | | | | The API now assumes that ioctl calls for FE_SET_PROPERTY and all set commands, and FE_GET_PROPERTY are get commands. Simplification. Signed-off-by: Steven Toth <stoth@linuxtv.org> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
| * V4L/DVB (9001): S2API: ISDBT_SEGMENT_NUM -> ISDBT_SEGMENT_IDXSteven Toth2008-10-12
| | | | | | | | | | Signed-off-by: Steven Toth <stoth@linuxtv.org> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
| * V4L/DVB (8998): s2api: restore DTV_UNDEFINEDSteven Toth2008-10-12
| | | | | | | | | | | | Signed-off-by: Steven Toth <stoth@linuxtv.org> Signed-off-by: Michael Krufky <mkrufky@linuxtv.org> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
| * V4L/DVB (8997): S2API: Cleanup SYMBOLRATE, INNERFEC -> SYMBOL_RATE, INNER_FECSteven Toth2008-10-12
| | | | | | | | | | | | | | This is now consistent with the existing API. Signed-off-by: Steven Toth <stoth@linuxtv.org> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
| * V4L/DVB (8996): S2API: typedefs replaced, _SEQ_'s removed, fixed 16 command ↵Steven Toth2008-10-12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | arrays replaced After discussion the following changes were made: 1. Removed the typedefs in frontend.h, use structures. 2. In the frontend.h, remove the 16 command limit on the API and switch to a flexible variable length API. For practical reasons a #define limits this to 64, this should be discussed. 3. Changed dvb-core ioctl handing to deal with variable sequences of commands. tune-v0.0.3.c is required to use this API, it contains the interface changes. Signed-off-by: Steven Toth <stoth@linuxtv.org> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
| * V4L/DVB (8995): S2API: tv_ / TV_ to dtv_ / DTV_ namespace changesSteven Toth2008-10-12
| | | | | | | | | | | | | | The group preferred dtv_ over tv_, this implements it. Signed-off-by: Steven Toth <stoth@linuxtv.org> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
| * V4L/DVB (8985): S2API: Added dvb frontend changes to support a newer tuning APISteven Toth2008-10-12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This is an experimental patch to add a new tuning mechanism for dvb frontends. Rather than passing fixed structures across the user/kernel boundary, which need to be revised for each new modulation type (or feature the kernel developers want to add), this implements a simpler message based approach, allowing fe commands to be broken down into a series of small fixed size transactions, presented in an array. The goal is to avoid changing the user/kernel ABI in the future, by simply creating new frontend commands (and sequencies of commands) that help us add support for brand new demodulator, delivery system or statistics related commmands. known issues: checkpatch voilations feedback from various developers yet to be implemented, relating to namespace conventions, variable length array passing conventions, and generally some optimization. This patch should support all existing tuning mechanisms through the new API, as well as adding 8PSK, DVB-S2 NBC-QPSK and ISDB-T API support. For testing and exercise purposes, see the latest tune.c tool available from http://www.steventoth.net/linux/s2 Signed-off-by: Steven Toth <stoth@linuxtv.org> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
| * V4L/DVB (8959): include <linux/videodev2.h> into linux/ivtv.hKirill A. Shutemov2008-10-12
| | | | | | | | | | | | | | | | linux/videodev2.h defines enum v4l2_buf_type and struct v4l2_rect Signed-off-by: Kirill A. Shutemov <kirill@shutemov.name> Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
| * V4L/DVB (8940): saa7115: fix saa7111(a) supportHans Verkuil2008-10-12
| | | | | | | | | | | | | | | | | | The saa7111 support in saa7115.c was missing some features and did not properly take some of the differences into account. With this patch saa7115 can be used in the mxb driver instead of saa7111.c. Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
| * V4L/DVB (8559): replace __FUNCTION__ with __func__Alexander Beregalov2008-10-12
| | | | | | | | | | | | | | v4l: replace __FUNCTION__ with __func__ Signed-off-by: Alexander Beregalov <a.beregalov@gmail.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
| * V4L/DVB (8852): v4l2: use register_chrdev_region instead of register_chrdevHans Verkuil2008-10-12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Replace the old register_chrdev with the more flexible register_chrdev_region. Ensure that the release() is called when the very last chardev usage was released, and not when the sysfs devices were removed. This should simplify hotpluggable drivers considerably. Tested-by: Mike Isely <isely@isely.net> Tested-by: Laurent Pinchart <laurent.pinchart@skynet.be> Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl> Acked-by: David Ellingsworth <david@identd.dyndns.org> Reviewed-by: Hans de Goede <j.w.r.degoede@hhs.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
| * V4L/DVB (8787): v4l2-dev: cleanups and add video_drvdata helper functionHans Verkuil2008-10-12
| | | | | | | | | | | | | | | | | | Cleanup v4l2-dev.[ch], add/improve comments and add a new helper function: video_drvdata() that can get the private driver data from a file struct. Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
| * V4L/DVB (8786): v4l2: remove the priv field, use dev_get_drvdata insteadHans Verkuil2008-10-12
| | | | | | | | | | | | | | | | | | | | Remove the priv field and let video_get/set_drvdata use dev_get_drvdata and dev_set_drvdata instead. Convert all drivers that still used priv directly. Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
| * V4L/DVB (8785): v4l2: add __must_check to v4l2_dev.hHans Verkuil2008-10-12
| | | | | | | | | | Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
| * V4L/DVB (8782): v4l2-dev: add video_device_release_emptyHans Verkuil2008-10-12
| | | | | | | | | | | | | | | | | | | | | | | | Add a second release function: video_device_release_empty It can be used by drivers that have statically allocated video_device structs. Its use usually, but not always, indicates laziness on the part of the driver programmer. Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
| * V4L/DVB (8781): v4l2-dev: remove obsolete video_exclusive_open/releaseHans Verkuil2008-10-12
| | | | | | | | | | Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
| * V4L/DVB (8777): tea575x-tuner: replace video_exclusive_open/releaseHans Verkuil2008-10-12
| | | | | | | | | | | | | | | | Move the video_exclusive_open/release functionality into the driver itself. Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
| * V4L/DVB (8691): i2c-id: remove obsolete SAB3036 driver IDHans Verkuil2008-10-12
| | | | | | | | | | Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
| * V4L/DVB (8687): soc-camera: Move .power and .reset from soc_camera host to ↵Stefan Herbrechtsmeier2008-10-12
| | | | | | | | | | | | | | | | | | | | | | | | | | sensor driver Make .power and .reset callbacks per camera instead of per host, also move their invocation to camera drivers. .arch/arm/mach-pxa/include/mach/camera.h | 2 - Signed-off-by: Stefan Herbrechtsmeier <hbmeier@hni.uni-paderborn.de> Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
| * V4L/DVB (8683): Add Micron mt9m111 chip ID in V4L2 identifiersRobert Jarzmik2008-10-12
| | | | | | | | | | | | Signed-off-by: Robert Jarzmik <robert.jarzmik@free.fr> Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
| * V4L/DVB (8649): v4l2: add AAC bitrate controlHans Verkuil2008-10-12
| | | | | | | | | | | | | | | | If you can select AAC as audio encoder, then you should also be able to set the bitrate. Add this missing control. Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
| * V4L/DVB (8639): saa6752hs: cleanup and add AC-3 supportHans Verkuil2008-10-12
| | | | | | | | | | | | | | | | | | Cleaned up the saa6752hs i2c driver. Add AC-3 support. Add VIDIOC_CHIP_IDENT support. Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
| * V4L/DVB (8637): v4l2: add v4l2_ctrl_query_menu_valid_items support functionHans Verkuil2008-10-12
| | | | | | | | | | | | | | | | | | | | | | v4l2_ctrl_query_menu_valid_items() makes it easy to handle control menus that have a lot of invalid 'holes'. For example, many MPEG encoders only support a limited subset of audio bitrates. In that case a driver can specify an array listing the set of valid bitrates and pass that to this function. Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
| * V4L/DVB (8636): v4l2: add v4l2_ctrl_get_name control support function.Hans Verkuil2008-10-12
| | | | | | | | | | | | | | | | | | Add function that returns the control name. Allows this to be used in places where the normal v4l2_ctrl_query_fill() function cannot be used (e.g. uvc). Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
| * V4L/DVB (8635): v4l: add AC-3 audio support to the MPEG Encoding APIHans Verkuil2008-10-12
| | | | | | | | | | | | | | | | Some models of the saa6752hs support AC-3. Extend the API with the necessary controls for AC-3. Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
| * V4L/DVB (8634): v4l2: extend MPEG Encoding API with AVC and AACJanne Grunau2008-10-12
| | | | | | | | | | | | | | | | | | | | Adds Advanced Audio Coding (AAC) and MPEG-4 Advanced Video Coding (AVC/H.264) as audio/video codecs to the extended controls API. Updates cx2341x driver to the new values. Signed-off-by: Janne Grunau <j@jannau.net> Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
| * V4L/DVB (8628): bttv: Add support for Encore ENLTV2-FMMauro Carvalho Chehab2008-10-12
| | | | | | | | | | | | | | | | Thanks to Sistema Fenix (http://www.sistemafenix.com.br/) and CDI Brasil (www.cdibrasil.com.br/) for sponsoring this development. Signed-off-by: Gilberto <gilberto@sistemafenix.com.br> Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
| * V4L/DVB (8626): Add support for TCL tuner MF02GIP-5N-EMauro Carvalho Chehab2008-10-12
| | | | | | | | | | | | | | | | | | Thanks to Sistema Fenix (http://www.sistemafenix.com.br/) and CDI Brasil (www.cdibrasil.com.br/) for sponsoring this development. Signed-off-by: Gilberto <gilberto@sistemafenix.com.br> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
| * V4L/DVB (8625): saa7134: Add NEC prococol IR decoding capabilityMauro Carvalho Chehab2008-10-12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch adds the capability of decoding NEC protocol, received via GPIO18 line. This GPIO port can trigger saa7134 IRQ. A future improvement would be to make it a little more generic to work also with GPIO16 line. A pure IRQ code didn't work, since some delays were introduced on the tests we did. A possible approach would be to use polling at a rate of 2.5 ms or less. If a new code were taken, a code similar to nec_task() could be used. However, this would add an extra overhead to kernel, and will consume more power. Due to that, we took an hybrid approach: an IRQ upper half to trigger when a new key is received and a bottom half to convert pulse-distance into a keycode. The bottom half is polling based, to improve performance. During the bottom half proccess, GPIO18 IRQ line is disabled, preventing IRQ reentrancy and improving performance a little bit. Thanks to Sistema Fenix (http://www.sistemafenix.com.br/) for sponsoring this development. Signed-off-by: Gilberto <gilberto@sistemafenix.com.br> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
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