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path: root/drivers/media/video/em28xx/em28xx-audio.c
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* [media] em28xx-audio: fix some locking issuesMauro Carvalho Chehab2010-10-20
| | | | | | | Those locking issues affect tvtime, causing a kernel oops/panic, due to a race condition. Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* V4L/DVB: em28xx: "Empia Em28xx Audio" too longDan Carpenter2010-05-17
| | | | | | | | card->driver is 15 characters and a NULL. The original code goes past the end of the array. Signed-off-by: Dan Carpenter <error27@gmail.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* V4L/DVB (13289): em28xx-audio: Convert printks to em28xx_errFilipe Rosset2009-12-05
| | | | | | | | Convert printks to em28xx_err. Signed-off-by: Filipe Rosset <rosset.filipe@gmail.com> Signed-off-by: Douglas Schilling Landgraf <dougsland@redhat.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* V4L/DVB (13190): em28xx: fix panic that can occur when starting audio streamingDevin Heitmueller2009-11-07
| | | | | | | | | | | | | Because the counters were not reset when starting up streaming, they would be reused from the previous run. This can result in cases such that when the second instance of streaming starts up, the "cnt" variable in em28xx_audio_isocirq() can end up being negative, resulting in attempting to write to memory before the start of runtime->dma_area (as well as having a negative number of bytes to copy). Signed-off-by: Devin Heitmueller <dheitmueller@kernellabs.com> CC: stable@kernel.org Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* V4L/DVB (11896): em28xx: Fix for Slow Memory LeakRobert Krakora2009-06-16
| | | | | | | | | | | | | | | | Test Code: (Provided by Douglas) v4l-dvb/v4l2-apps/test/stress-buffer.c The audio DMA area was never being freed and would slowly leak over time as the v4l device was opened and closed by an application. Thanks again to Douglas for generating the test code to help locate memory leaks!!! Signed-off-by: Robert Krakora <rob.krakora@messagenetsystems.com> Signed-off-by: Douglas Schilling Landgraf <dougsland@redhat.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* V4L/DVB (10555): em28xx: CodingStyle fixesNicola Soranzo2009-03-30
| | | | | | | | Coding style fixes for recent changesets in em28xx. Signed-off-by: Nicola Soranzo <nsoranzo@tiscali.it> Signed-off-by: Douglas Schilling Landgraf <dougsland@redhat.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* V4L/DVB (10525): em28xx: Coding style fixes and a typo correctionNicola Soranzo2009-03-30
| | | | | | | | | Lots of coding style fixes and a typo correction for em28xx. [dougsland@redhat.com: fixed a reject due to a change on em28xx-audio.c] Signed-off-by: Nicola Soranzo <nsoranzo@tiscali.it> Signed-off-by: Douglas Schilling Landgraf <dougsland@redhat.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* V4L/DVB (10523): em28xx-audio: Add macros EM28XX_START_AUDIO / EM28XX_STOP_AUDIODouglas Schilling Landgraf2009-03-30
| | | | | | | Added macros EM28XX_START_AUDIO and EM28XX_STOP_AUDIO for em28xx_cmd(). Signed-off-by: Douglas Schilling Landgraf <dougsland@redhat.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* V4L/DVB (10522): em28xx-audio: replace printk with em28xx_errdevAlexey Klimov2009-03-30
| | | | | | | | | Patch removes printk and place em28xx_errdev macros to provide information about driver name to dmesg. Signed-off-by: Alexey Klimov <klimov.linux@gmail.com> Signed-off-by: Douglas Schilling Landgraf <dougsland@redhat.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* V4L/DVB (10521): em28xx-audio: Add lock for usersDouglas Schilling Landgraf2009-03-30
| | | | | | | Added lock for users count Signed-off-by: Douglas Schilling Landgraf <dougsland@redhat.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* V4L/DVB (10520): em28xx-audio: Add spinlock for triggerDouglas Schilling Landgraf2009-03-30
| | | | | | | Added spinlock for trigger session Signed-off-by: Douglas Schilling Landgraf <dougsland@redhat.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* V4L/DVB (10519): em28xx: Fix for em28xx audio startupRobert Krakora2009-03-30
| | | | | | | | | | | Essentially if a snd_em28xx_capture_trigger() stop followed by a snd_em28xx_capture_trigger() start would not yield any data because there was some logic put in with an adev->shutdown variable which did not seem warranted in my humble opinion. It would cause snd_em28xx_capture_trigger start never to start up the audio stream until the device was closed and reopened again. Upon re-opening the device adev->shutdown is reset and audio data would again flow. Signed-off-by: Robert Krakora <rob.krakora@messagenetsystems.com> Signed-off-by: Douglas Schilling Landgraf <dougsland@redhat.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* V4L/DVB (10518): em28xx: Fix for em28xx memory leak and function renameRobert Krakora2009-03-30
| | | | | | | | Fix for em28xx memory leak and function rename Signed-off-by: Robert Krakora <rob.krakora@messagenetsystems.com> Signed-off-by: Douglas Schilling Landgraf <dougsland@redhat.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* V4L/DVB (10517): em28xx: remove bad check (changeset a31c595188af)Douglas Schilling Landgraf2009-03-30
| | | | | | | | Removed bad check. Thanks to Robert Krakora <rob.krakora@messagenetsystems.com> to report that. Signed-off-by: Douglas Schilling Landgraf <dougsland@redhat.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* V4L/DVB (10327): em28xx: Add check before call em28xx_isoc_audio_deinit()Douglas Schilling Landgraf2009-03-30
| | | | | | | Just call em28xx_isoc_audio_deinit() if em28xx sent a usb_submit(). Signed-off-by: Douglas Schilling Landgraf <dougsland@redhat.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* V4L/DVB (10326): em28xx: Cleanup: fix bad whitespacingDouglas Schilling Landgraf2009-03-30
| | | | | Signed-off-by: Douglas Schilling Landgraf <dougsland@redhat.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* Merge branch 'topic/snd_card_new-err' into for-linusTakashi Iwai2009-03-23
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| * drivers/media: Convert to snd_card_create()Takashi Iwai2009-01-12
| | | | | | | | | | | | Convert from snd_card_new() to the new snd_card_create() function. Signed-off-by: Takashi Iwai <tiwai@suse.de>
* | V4L/DVB (10659): em28xx: register device to soundcard for sysfsNicola Soranzo2009-02-26
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | As explained in "Writing an ALSA driver" (T. Iwai), audio drivers should set the struct device for the card before registering the card instance. This will add the correct /sys/class/sound/cardN/device symlink, so HAL can see the device and ConsoleKit sets its ACL permissions for the logged-in user. For em28xx audio capture cards found e.g. in Hauppauge WinTV-HVR-900 (R2), this patch fixes errors like: ALSA lib pcm_hw.c:1429:(_snd_pcm_hw_open) Invalid value for card Error opening audio: Permission denied when running mplayer as a normal user. Signed-off-by: Nicola Soranzo <nsoranzo@tiscali.it> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* | V4L/DVB (10325): em28xx: Fix for fail to submit URB with IRQs and ↵Robert Krakora2009-01-29
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Pre-emption Disabled Trace: (Provided by Douglas) BUG: sleeping function called from invalid context at drivers/usb/core/urb.c:558 in_atomic():0, irqs_disabled():1 Pid: 4918, comm: sox Not tainted 2.6.27.5 #1 [<c04246d8>] __might_sleep+0xc6/0xcb [<c058c8b0>] usb_kill_urb+0x1a/0xd8 [<c0488e68>] ? __kmalloc+0x9b/0xfc [<c0488e85>] ? __kmalloc+0xb8/0xfc [<c058cd5a>] ? usb_alloc_urb+0xf/0x31 [<f8dd638c>] em28xx_isoc_audio_deinit+0x2f/0x6c [em28xx_alsa] [<f8dd6573>] em28xx_cmd+0x1aa/0x1c5 [em28xx_alsa] [<f8dd65e1>] snd_em28xx_capture_trigger+0x53/0x68 [em28xx_alsa] [<f8aa8674>] snd_pcm_do_start+0x1c/0x23 [snd_pcm] [<f8aa85d7>] snd_pcm_action_single+0x25/0x4b [snd_pcm] [<f8aa9833>] snd_pcm_action+0x6a/0x76 [snd_pcm] [<f8aa98f5>] snd_pcm_start+0x14/0x16 [snd_pcm] [<f8aae10e>] snd_pcm_lib_read1+0x66/0x273 [snd_pcm] [<f8aac5a3>] ? snd_pcm_kernel_ioctl+0x46/0x5f [snd_pcm] [<f8aae4a7>] snd_pcm_lib_read+0xbf/0xcd [snd_pcm] [<f8aad774>] ? snd_pcm_lib_read_transfer+0x0/0xaf [snd_pcm] [<f89feeb6>] snd_pcm_oss_read3+0x99/0xdc [snd_pcm_oss] [<f89fef9c>] snd_pcm_oss_read2+0xa3/0xbf [snd_pcm_oss] [<c064169d>] ? _cond_resched+0x8/0x32 [<f89ff0be>] snd_pcm_oss_read+0x106/0x150 [snd_pcm_oss] [<f89fefb8>] ? snd_pcm_oss_read+0x0/0x150 [snd_pcm_oss] [<c048c6e2>] vfs_read+0x81/0xdc [<c048c7d6>] sys_read+0x3b/0x60 [<c04039bf>] sysenter_do_call+0x12/0x34 ======================= The culprit in the trace is snd_pcm_action() which invokes a spin lock which disables pre-emption which disables an IRQ which causes the __might_sleep() function to fail the irqs_disabled() test. Since pre-emption is enabled then it is safe to de-allocate the memory if you first unlink each URB. In this instance you are safe since pre-emption is disabled. If pre-emption and irqs are not disabled then call usb_kill_urb(), else call usb_unlink_urb(). Thanks to Douglas for tracking down this bug originally!!! [dougsland@redhat.com: Fixed codyingstyle] Signed-off-by: Robert Krakora <rob.krakora@messagenetsystems.com> Signed-off-by: Douglas Schilling Landgraf <dougsland@redhat.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* | V4L/DVB (10261): em28xx: fix kernel panic on audio shutdownDevin Heitmueller2009-01-29
| | | | | | | | | | | | | | | | | | | | | | Revert a change made in change 9743 which resulted in a kernel panic in some cases on shutdown of the audio stream. First discovered when working on the Pinnacle 880e support, and later reproduced by a user on the mailing list with the HVR-900 as well. Signed-off-by: Devin Heitmueller <dheitmueller@linuxtv.org> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* | V4L/DVB (10254): em28xx: Fix audio URB transfer buffer race conditionRobert Krakora2009-01-29
|/ | | | | | | | | | em28xx: Fix audio URB transfer buffer memory leak and race condition/corruption of capture pointer Leak fix kindly contributed by Pádraig Brady. Signed-off-by: Robert Krakora <rob.krakora@messagenetsystems.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* V4L/DVB (10163): em28xx: allocate adev together with struct em28xx devMauro Carvalho Chehab2009-01-02
| | | | | | | | | | Some devices require different setups on struct_audio. Due to that, we may need to change some fields at dev.adev during device probe. So, this patch moves the dynamic memory allocation of adev at em28xx-alsa to the dynamic allocation of struct em28xx dev that happens during device probe. Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* V4L/DVB (9588): Don't load em28xx audio module for digital-only devicesDevin Heitmueller2008-12-29
| | | | | | | | Rework the logic so that the em28xx-alsa module does not get loaded for devices that don't support analog audio (such as the em2874) Signed-off-by: Devin Heitmueller <devin.heitmueller@gmail.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* V4L/DVB (9581): Remove unused variable from em28xx-audio.cDevin Heitmueller2008-12-29
| | | | | | | | | Remove unused variable from em28xx-audio.c Fix warning for unused "ret" variable Signed-off-by: Devin Heitmueller <devin.heitmueller@gmail.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* V4L/DVB (9532): Properly handle error messages during alsa registeringMauro Carvalho Chehab2008-12-29
| | | | Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* em28xx: remove backward compat macro added on a previous fixMauro Carvalho Chehab2008-12-01
| | | | | | | | | | commit 50f3beb50abe0cc0228363af804e50e710b3e5b0 fixed em28xx-alsa locking schema. However, a backport macro was kept. This patch removes the macro, since it is not needed for the module compilation against upstream. Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* V4L/DVB (9743): em28xx: fix oops audioDouglas Schilling Landgraf2008-12-01
| | | | | | | | | | | Replaced usb_kill_usb for usb_unlink_usb (wait until urb to fully stop require USB core to put the calling process to sleep). Oops: http://www.kerneloops.org/raw.php?rawid=71799&msgid= Signed-off-by: Douglas Schilling Landgraf <dougsland@linuxtv.org> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* V4L/DVB (9742): em28xx-alsa: implement another locking schemaMauro Carvalho Chehab2008-11-24
| | | | | | | Instead of using a spinlock, it is better to call the proper pcm stream locking schema. Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* V4L/DVB (9103): em28xx: HVR-900 B3C0 - fix audio clicking issueWiktor Grebla2008-10-04
| | | | | | | | Fixed audio clicking problem which could be heard when using analog tv or composite input Signed-off-by: Wiktor Grebla <greblus@gmail.com> Signed-off-by: Douglas Schilling Landgraf <dougsland@linuxtv.org> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* V4L/DVB (8884): em28xx-audio: fix memory leakDouglas Schilling Landgraf2008-09-29
| | | | | | | Free allocated memory Signed-off-by: Douglas Schilling Landgraf <dougsland@linuxtv.org> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* V4L/DVB (8026): Avoids an OOPS if dev struct can't be successfully recoveredMauro Carvalho Chehab2008-06-26
| | | | | | | | | | | | On some alsa versions, it seems that snd_pcm_substream_chip(substream) is returning a NULL pointer. This causes an OOPS, as reported by: https://bugs.launchpad.net/ubuntu/+source/linux-ubuntu-modules-2.6.24/+bug/212271 https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/212960 This patch avoids the OOPS by not letting and open() succeed. Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
* V4L/DVB (8017): Ensure em28xx extensions only get run against devs that ↵Devin Heitmueller2008-06-26
| | | | | | | | | | | | | support them em28xx-audio.c em28xx-dvb.c - Em28xx extensions should ensure they are being only loaded against devices that support them. Deals with case where there are multiple em28xx devices, some of which have DVB (or ALSA) support and some do not. Signed-off-by: Devin Heitmueller <devin.heitmueller@gmail.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
* V4L/DVB (7522): media/video/em28xx replace remaining __FUNCTION__ occurrencesHarvey Harrison2008-04-24
| | | | | | | | __FUNCTION__ is gcc-specific, use __func__ Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com> Signed-off-by: Michael Krufky <mkrufky@linuxtv.org> Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
* V4L/DVB (7164): em28xx-alsa: Add a missing mutexMauro Carvalho Chehab2008-02-18
| | | | Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
* V4L/DVB (7049): Remove sound/driver.hMauro Carvalho Chehab2008-02-18
| | | | | | sound/driver.h is already included by sound/core. Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
* V4L/DVB (6952): Add code for autoloading em28xx-alsa, if neededMauro Carvalho Chehab2008-01-25
| | | | | | | | | | | | | | | | Older em28xx devices does implement standard Audio Class. However, on newer devices, this were replaced by a Vendor Class. This patch autodetects that an em28xx lacks Audio Class and auto-loads em28xx-alsa, for the devices that implements only a Vendor Class. For devices with Audio Class, snd-usb-audio module will provide an ALSA interface. This patch uses the request_module_async function as defined on cx88-mpeg.c, originally wrote by Markus Rechberger. Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
* V4L/DVB (6951): Integrates em28xx-audio.c into em28xx kernel moduleMauro Carvalho Chehab2008-01-25
| | | | | | Also fixes the remaining CodingStyle issues that Lindent didn't fix. Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
* V4L/DVB (6950): Lindent em28xx-audio.cMauro Carvalho Chehab2008-01-25
| | | | Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
* V4L/DVB (6949): Adds em28xx-audio moduleMarkus Rechberger2008-01-25
em28xx-audio module exports em28xx Vendor Class audio as an -alsa driver. This module were written based on usbaudio driver by Markus Rechberger. Recently, he acked to allow us to merge it on kernel: http://lists-archives.org/video4linux/20408-supporting-prolink-pixelview-405-dvd-maker.html Thanks to Markus Rechberger <mrechberger@gmail.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
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