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path: root/sound/usb/mixer.c
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2011-05-25ALSA: usb-audio: export snd_usb_feature_unit_ctlDaniel Mack
In order to allow quirks functions to hook up to the standard feature unit op tables, this patch exports a pointer to the struct that is used internally. That way, all the code handling the control can be kept private, and external code can reference the symbol to re-use it. Signed-off-by: Daniel Mack <zonque@gmail.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2011-05-25ALSA: usb-audio: rework add_control_to_empty()Daniel Mack
This patch renames add_control_to_empty() to snd_usb_mixer_add_control() and exports it, so the quirks functions can make use of it. Also, as "struct mixer_build" is private to mixer.c, rewrite the function to take an argument of type "struct usb_mixer_interface" instead. Signed-off-by: Daniel Mack <zonque@gmail.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2011-05-22Merge branch 'topic/misc' into for-linusTakashi Iwai
2011-04-28ALSA: usb-audio - Don't expose broken dB rangesTakashi Iwai
Some crappy USB-audio devices give broken dB ranges, e.g. both min and max are 0dB. This confuses the volume control that prefers dB expression such as alsactl or PulseAudio. In such a case, it's much better not to expose the broken dB information. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2011-03-31Fix common misspellingsLucas De Marchi
Fixes generated by 'codespell' and manually reviewed. Signed-off-by: Lucas De Marchi <lucas.demarchi@profusion.mobi>
2011-03-11ALSA: usbaudio: implement USB autosuspendOliver Neukum
Devices are autosuspended if no pcm nor midi channel is open Mixer devices may be opened. This way they are active when in use to play or record sound, but can be suspended while users have a mixer application running. [Small clean-ups using static inline by tiwai] Signed-off-by: Oliver Neukum <oneukum@suse.de> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2011-03-11ALSA: usbaudio: fix suspend/resumeOliver Neukum
- ESHUTDOWN must be correctly handled - the optional interrupt endpoint's URB must be stopped and restarted Signed-off-by: Oliver Neukum <oneukum@suse.de> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2011-03-11Merge branch 'fix/misc' into topic/miscTakashi Iwai
2011-03-10ALSA: usb-audio - Add "cval->res = 384" quirk for Logitech Webcam C600Alexey Fisher
One more affected devices: Logitech Webcam C600 (046d:0808) Volume range before quirk is 6400, after (also real) is 16. Signed-off-by: Alexey Fisher <bug-track@fisher-privat.net> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2011-03-10ALSA: usb-audio - Add volume range check and warn if it too bigAlexey Fisher
Signed-off-by: Alexey Fisher <bug-track@fisher-privat.net> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2011-02-08ALSA: usbaudio - Enable the E-MU 0204 USBJoseph Teichman
Signed-off-by: Joseph Teichman <josteich@gmail.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2011-01-10ALSA: usb-audio: use enum control info helperClemens Ladisch
Simplify info callbacks by using the snd_ctl_enum_info() helper function. Signed-off-by: Clemens Ladisch <clemens@ladisch.de> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2010-09-16ALSA: usb/mixer: remove bogus castDan Carpenter
"uinfo->value.enumerated.item" is an unsigned int. If it's negative when we do the comparison: if ((int)uinfo->value.enumerated.item >= cval->max) then we would read past the end of the array on the next line. I also changed the strcpy() to strlcpy() out of paranoia. Signed-off-by: Dan Carpenter <error27@gmail.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2010-09-16ALSA: usb-audio - Fix an unused-variable compile warningTakashi Iwai
Used only when CONFIG_SND_DEBUG=y sound/usb/mixer.c: In function 'get_min_max': sound/usb/mixer.c:762: warning: unused variable 'chip' Reported-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2010-09-03ALSA: usb-audio: fix detection of vendor-specific device protocol settingsClemens Ladisch
The Audio Class v2 support code in 2.6.35 added checks for the bInterfaceProtocol field. However, there are devices (usually those detected by vendor-specific quirks) that do not have one of the predefined values in this field, which made the driver reject them. To fix this regression, restore the old behaviour, i.e., assume that a device with an unknown bInterfaceProtocol field (other than UAC_VERSION_2) has more or less UAC-v1-compatible descriptors. [compile warning fixes by tiwai] Signed-off-by: Clemens Ladisch <clemens@ladisch.de> Cc: Daniel Mack <daniel@caiaq.de> Cc: <stable@kernel.org> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2010-06-24ALSA: usb - Fix compile error with CONFIG_SND_DEBUG_VERBOSE=yTakashi Iwai
Replaced the forgotten cval->mixer->ctrlif. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2010-06-23ALSA: usb-audio: simplify control interface accessDaniel Mack
As the control interface is now carried in struct snd_usb_audio, we can simplify the API a little and also drop the private ctrlif field from struct usb_mixer_interface. Also remove a left-over function prototype in pcm.h. Signed-off-by: Daniel Mack <daniel@caiaq.de> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2010-06-23ALSA: usb-audio: move and add some commentsDaniel Mack
Also add a list of open topics. Signed-off-by: Daniel Mack <daniel@caiaq.de> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2010-06-23ALSA: usb-audio: unify UAC macros and struct namesDaniel Mack
Get rid of the last occurances of _v1 suffixes, and move the version number right after the "uac" string. Now things are consitent again. Sorry for the forth and back, but it just looks much nicer this way. Signed-off-by: Daniel Mack <daniel@caiaq.de> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2010-06-23ALSA: usb-audio - Add volume resolution quirk for some Logitech webcamsAlexey Fisher
Some programs like Skype trying to set capture volume automatically. Normally it will tray, carefully step by step lover or higher, set the volume. In real word it work not really well, because devises and vendors lie about real audio settings. For example most Logitech webcams have 6400 or 3500 steps for capture volume. They do not tell that actual resolution is 384. So we have only 7 or 18 real steps. In this patch I set real resolution only for tested devices. Signed-off-by: Alexey Fisher <bug-track@fisher-privat.net> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2010-06-11ALSA: usb-audio: fix UAC2 control value queriesDaniel Mack
For RANGE requests, we should only query as much bytes as we're in fact interested in. For CUR requests, we shouldn't confuse the firmware with an overlong request but just ask for 2 bytes. This might need fixing in the future as it's not entirely clear when to dispatch 1-byte, 2-byte and 4-byte request blocks. For now, we assume everything is coded in 16bit - this works for all firmware implementations I've seen. Signed-off-by: Daniel Mack <daniel@caiaq.de> Reported-by: Alex Lee <alexlee188@gmail.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2010-05-31ALSA: usb-audio: export UAC2 clock selectors as mixer controlsDaniel Mack
The UAC2 clock selectors are fortunately compatible with UAC1 audio selector units, so we can simply reuse the same approach to get all the linked units. Requests to this control need a different CS value though. Signed-off-by: Daniel Mack <daniel@caiaq.de> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2010-05-31ALSA: usb-audio: clean up find_audio_control_unit()Daniel Mack
Use a struct to parse the audio units, and return usable descriptors for all types. There's no need to limit the result set, except for some kind of sanity check. Signed-off-by: Daniel Mack <daniel@caiaq.de> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2010-05-31ALSA: usb-audio: add UAC2 sepecific Feature Unit controlsDaniel Mack
The bits to enable them are always 0 for UAC1 devices, so no additional checks are required. Signed-off-by: Daniel Mack <daniel@caiaq.de> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2010-05-31ALSA: usb-audio: unify constants from specificationDaniel Mack
Move more definitions from private enums to appropriate header files. Signed-off-by: Daniel Mack <daniel@caiaq.de> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2010-05-31ALSA: usb-audio: support partially write-protected UAC2 controlsDaniel Mack
So far, UAC2 controls are marked read-only if any of the channels are marked read-only in the descriptors. Change this behaviour and - mark them writeable unless all channels are read-only - store the read-only mask in usb_mixer_elem_info and - check the mask again in set_cur_mix_value(), and bail out for write-protected channels. Signed-off-by: Daniel Mack <daniel@caiaq.de> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2010-05-31ALSA: usb-audio: UAC2: clean up parsing of bmaControlsDaniel Mack
Introduce two new static inline functions for a more readable parsing of UAC2 bmaControls. Signed-off-by: Daniel Mack <daniel@caiaq.de> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2010-05-28ALSA: usb-audio: fix feature unit parser for UAC2Daniel Mack
Fix a small off-by-one bug which causes the feature unit to announce a wrong number of channels. This leads to illegal requests sent to the firmware eventually. Signed-off-by: Daniel Mack <daniel@caiaq.de> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2010-05-20Merge branch 'topic/usb' into for-linusTakashi Iwai
2010-05-11ALSA: sound/usb: add preliminary support for UAC2 interruptsDaniel Mack
For both UAC1 and UAC2, interrupt endpoint messages are now parsed with structs rather that with anonymous buffer array accesses. For UAC2, only CUR interrupt notifications are supported for now. snd_usb_mixer_status_complete() was renamed to snd_usb_mixer_interrupt(). Fixed one indentation flaw on the way. Signed-off-by: Daniel Mack <daniel@caiaq.de> Cc: Clemens Ladisch <clemens@ladisch.de> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2010-05-08ALSA: sound/usb: fix UAC1 regressionDaniel Mack
Commit 23caaf19b ("ALSA: usb-mixer: Add support for Audio Class v2.0") broke support for Class1 devices due to two faulty changes. This patch fixes it. Signed-off-by: Daniel Mack <daniel@caiaq.de> Reported-and-Tested-by: The Source <thesourcehim@gmail.com> Cc: Clemens Ladisch <clemens@ladisch.de> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2010-04-16ALSA: usb/mixer - use get_iface_desc() rather than direct structureJaroslav Kysela
Signed-off-by: Jaroslav Kysela <perex@perex.cz>
2010-03-12ALSA: usb-mixer: Add support for Audio Class v2.0Daniel Mack
USB Audio Class v2.0 compliant devices have different descriptors and a different way of setting/getting min/max/res/cur properties. This patch adds support for them. Signed-off-by: Daniel Mack <daniel@caiaq.de> Cc: Clemens Ladisch <clemens@ladisch.de> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2010-03-12ALSA: usb-mixer: parse descriptors with structsDaniel Mack
Introduce a number of new structs for mixer, selector, feature and processing units and some static inline helpers to access fields which have dynamic offsets. Use them in mixer.c to parse the descriptors. This is necessary for the upcoming audio v2 parsers. Signed-off-by: Daniel Mack <daniel@caiaq.de> Cc: Clemens Ladisch <clemens@ladisch.de> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2010-03-12ALSA: usbmixer: rename usbmixer.[ch] -> mixer.[ch]Daniel Mack
For clearer namespace, also rename usbmixer_maps.c -> mixer_maps.c Signed-off-by: Daniel Mack <daniel@caiaq.de> Cc: Clemens Ladisch <clemens@ladisch.de> Signed-off-by: Takashi Iwai <tiwai@suse.de>
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