ALSA: add Apple iSight microphone driver

This adds an experimental driver for the front and rear microphones of
the Apple iSight web camera.

Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

sound/firewire/Kconfig

@@ -22,4 +22,16 @@ config SND_FIREWIRE_SPEAKERS
 	  To compile this driver as a module, choose M here: the module
 	  will be called snd-firewire-speakers.
 
+config SND_ISIGHT
+	tristate "Apple iSight microphone (EXPERIMENTAL)"
+	depends on EXPERIMENTAL
+	select SND_PCM
+	select SND_FIREWIRE_LIB
+	help
+	  Say Y here to include support for the front and rear microphones
+	  of the Apple iSight web camera.
+
+	  To compile this driver as a module, choose M here: the module
+	  will be called snd-isight.
+
 endif # SND_FIREWIRE

sound/firewire/Makefile

@@ -1,6 +1,8 @@
 snd-firewire-lib-objs := lib.o iso-resources.o packets-buffer.o \
 			 fcp.o cmp.o amdtp.o
 snd-firewire-speakers-objs := speakers.o
+snd-isight-objs := isight.o
 
 obj-$(CONFIG_SND_FIREWIRE_LIB) += snd-firewire-lib.o
 obj-$(CONFIG_SND_FIREWIRE_SPEAKERS) += snd-firewire-speakers.o
+obj-$(CONFIG_SND_ISIGHT) += snd-isight.o