ALSA: usb-mixer: factor out quirks

Move all non-standard mixer controls and vendor-specific extensions to a
separate file. Some structs need to be exported now.
Signed-off-by: Daniel Mack <daniel@caiaq.de>
Cc: Clemens Ladisch <clemens@ladisch.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

sound/usb/Makefile

@@ -4,6 +4,7 @@
 
 snd-usb-audio-objs := 	card.o \
 			usbmixer.o \
+			mixer_quirks.o \
 			proc.o \
 			quirks.o \
 			format.o \

sound/usb/mixer_quirks.h

+#ifndef SND_USB_MIXER_QUIRKS_H
+#define SND_USB_MIXER_QUIRKS_H
+
+int snd_usb_mixer_apply_create_quirk(struct usb_mixer_interface *mixer);
+
+void snd_emuusb_set_samplerate(struct snd_usb_audio *chip,
+			       unsigned char samplerate_id);
+
+void snd_usb_mixer_rc_memory_change(struct usb_mixer_interface *mixer,
+				    int unitid);
+
+#endif /* SND_USB_MIXER_QUIRKS_H */
+

sound/usb/quirks.c

@@ -25,6 +25,7 @@
 #include "usbaudio.h"
 #include "card.h"
 #include "usbmixer.h"
+#include "mixer_quirks.h"
 #include "midi.h"
 #include "quirks.h"
 #include "helper.h"

sound/usb/usbmixer.h

 #ifndef __USBMIXER_H
 #define __USBMIXER_H
 
+struct usb_mixer_interface {
+	struct snd_usb_audio *chip;
+	unsigned int ctrlif;
+	struct list_head list;
+	unsigned int ignore_ctl_error;
+	struct urb *urb;
+	/* array[MAX_ID_ELEMS], indexed by unit id */
+	struct usb_mixer_elem_info **id_elems;
+
+	/* Sound Blaster remote control stuff */
+	const struct rc_config *rc_cfg;
+	u32 rc_code;
+	wait_queue_head_t rc_waitq;
+	struct urb *rc_urb;
+	struct usb_ctrlrequest *rc_setup_packet;
+	u8 rc_buffer[6];
+
+	u8 audigy2nx_leds[3];
+	u8 xonar_u1_status;
+};
+
+#define MAX_CHANNELS	10	/* max logical channels */
+
+struct usb_mixer_elem_info {
+	struct usb_mixer_interface *mixer;
+	struct usb_mixer_elem_info *next_id_elem; /* list of controls with same id */
+	struct snd_ctl_elem_id *elem_id;
+	unsigned int id;
+	unsigned int control;	/* CS or ICN (high byte) */
+	unsigned int cmask; /* channel mask bitmap: 0 = master */
+	int channels;
+	int val_type;
+	int min, max, res;
+	int dBmin, dBmax;
+	int cached;
+	int cache_val[MAX_CHANNELS];
+	u8 initialized;
+};
+
 int snd_usb_create_mixer(struct snd_usb_audio *chip, int ctrlif,
 			 int ignore_error);
 void snd_usb_mixer_disconnect(struct list_head *p);
 
-void snd_emuusb_set_samplerate(struct snd_usb_audio *chip,
-			unsigned char samplerate_id);
+void snd_usb_mixer_notify_id(struct usb_mixer_interface *mixer, int unitid);
+
+int snd_usb_mixer_set_ctl_value(struct usb_mixer_elem_info *cval,
+				int request, int validx, int value_set);
 
 #endif /* __USBMIXER_H */