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

 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

sound/firewire/iso-resources.c

@@ -36,6 +36,7 @@ int fw_iso_resources_init(struct fw_iso_resources *r, struct fw_unit *unit)
 
 	return 0;
 }
+EXPORT_SYMBOL(fw_iso_resources_init);
 
 /**
  * fw_iso_resources_destroy - destroy a resource manager
@@ -48,6 +49,7 @@ void fw_iso_resources_destroy(struct fw_iso_resources *r)
 	mutex_destroy(&r->mutex);
 	fw_unit_put(r->unit);
 }
+EXPORT_SYMBOL(fw_iso_resources_destroy);
 
 static unsigned int packet_bandwidth(unsigned int max_payload_bytes, int speed)
 {
@@ -152,6 +154,7 @@ int fw_iso_resources_allocate(struct fw_iso_resources *r,
 
 	return channel;
 }
+EXPORT_SYMBOL(fw_iso_resources_allocate);
 
 /**
  * fw_iso_resources_update - update resource allocations after a bus reset
@@ -203,6 +206,7 @@ int fw_iso_resources_update(struct fw_iso_resources *r)
 
 	return channel;
 }
+EXPORT_SYMBOL(fw_iso_resources_update);
 
 /**
  * fw_iso_resources_free - frees allocated resources
@@ -230,3 +234,4 @@ void fw_iso_resources_free(struct fw_iso_resources *r)
 
 	mutex_unlock(&r->mutex);
 }
+EXPORT_SYMBOL(fw_iso_resources_free);

sound/firewire/packets-buffer.c

@@ -60,6 +60,7 @@ int iso_packets_buffer_init(struct iso_packets_buffer *b, struct fw_unit *unit,
 error:
 	return err;
 }
+EXPORT_SYMBOL(iso_packets_buffer_init);
 
 /**
  * iso_packets_buffer_destroy - frees packet buffer resources
@@ -72,3 +73,4 @@ void iso_packets_buffer_destroy(struct iso_packets_buffer *b,
 	fw_iso_buffer_destroy(&b->iso_buffer, fw_parent_device(unit)->card);
 	kfree(b->packets);
 }
+EXPORT_SYMBOL(iso_packets_buffer_destroy);