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Commit 28e84225 authored by Mike Lockwood's avatar Mike Lockwood Committed by Alistair Strachan
Browse files

ANDROID: usb: gadget: f_audio_source: New gadget driver for audio output 



This driver presents a standard USB audio class interface to the host
and an ALSA PCM device to userspace

Bug: 78114713
Bug: 120441124
[badhri: f_audio_source is being migrated to userspace.]
Change-Id: If16b14a5ff27045f9cb2daaf1ae9195c5eeab7d0
Signed-off-by: default avatarMike Lockwood <lockwood@google.com>
[AmitP: Folded following android-4.9 commit changes into this patch
        Parts of e27543931009 ("ANDROID: usb: gadget: Fixes and hacks to make android usb gadget compile on 3.8")
        i6d9285e2574a ("ANDROID: usb: gadget: f_audio_source:replace deprecated API")]
Signed-off-by: default avatarAmit Pundir <amit.pundir@linaro.org>
[astrachan: Folded the following changes into this patch:
            ddfd0c4070c1 ("ANDROID: usb: gadget: f_audio_source: Move to USB_FUNCTION API")
            a3ab81aaa19e ("ANDROID: usb: gadget: f_audio_source: Move gadget functions code")
            2095c953d894 ("ANDROID: usb: gadget: f_audio_source: change max ISO packet size")
            8671b3e53638 ("ANDROID: usb: gadget: f_audio_source: Fixed USB Audio Class Interface Descriptor")
            af98f36edbe2 ("ANDROID: usb: gadget: f_audio_source: disable the CPU C-states upon playback")
            a830751a338e ("CHROMIUM: usb: gadget: f_audio_source: add .free_func callback")]
Signed-off-by: default avatarAlistair Strachan <astrachan@google.com>
parent f751d696

drivers/usb/gadget/Kconfig

+12 −0
Original line number Diff line number Diff line
@@ -218,6 +218,9 @@ config USB_F_TCM 
config USB_F_ACC

	tristate



config USB_F_AUDIO_SRC

	tristate



# this first set of drivers all depend on bulk-capable hardware.



config USB_CONFIGFS
@@ -386,6 +389,15 @@ config USB_CONFIGFS_F_ACC 
	help

	  USB gadget Accessory support



config USB_CONFIGFS_F_AUDIO_SRC

	bool "Audio Source gadget"

	depends on USB_CONFIGFS

	depends on SND

	select SND_PCM

	select USB_F_AUDIO_SRC

	help

	  USB gadget Audio Source support



config USB_CONFIGFS_F_UAC1

	bool "Audio Class 1.0"

	depends on USB_CONFIGFS

drivers/usb/gadget/function/Makefile

+2 −0
Original line number Diff line number Diff line
@@ -52,3 +52,5 @@ usb_f_tcm-y := f_tcm.o 
obj-$(CONFIG_USB_F_TCM)		+= usb_f_tcm.o

usb_f_accessory-y		:= f_accessory.o

obj-$(CONFIG_USB_F_ACC)		+= usb_f_accessory.o

usb_f_audio_source-y		:= f_audio_source.o

obj-$(CONFIG_USB_F_AUDIO_SRC)	+= usb_f_audio_source.o

drivers/usb/gadget/function/f_audio_source.c

0 → 100644
+1071 −0

File added.

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