ALSA: usb-audio: simplify control interface access

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>

1 files changed, 18 insertions, 19 deletions

diff --git a/sound/usb/mixer.c b/sound/usb/mixer.c
index 1163ec3ca8a0..035a77bd67a6 100644
--- a/sound/usb/mixer.c
+++ b/sound/usb/mixer.c
@@ -291,16 +291,15 @@ static int get_abs_value(struct usb_mixer_elem_info *cval, int val)
 
 static int get_ctl_value_v1(struct usb_mixer_elem_info *cval, int request, int validx, int *value_ret)
 {
+	struct snd_usb_audio *chip = cval->mixer->chip;
 	unsigned char buf[2];
 	int val_len = cval->val_type >= USB_MIXER_S16 ? 2 : 1;
 	int timeout = 10;
 
 	while (timeout-- > 0) {
-		if (snd_usb_ctl_msg(cval->mixer->chip->dev,
-				    usb_rcvctrlpipe(cval->mixer->chip->dev, 0),
-				    request,
+		if (snd_usb_ctl_msg(chip->dev, usb_rcvctrlpipe(chip->dev, 0), request,
 				    USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN,
-				    validx, cval->mixer->ctrlif | (cval->id << 8),
+				    validx, snd_usb_ctrl_intf(chip) | (cval->id << 8),
 				    buf, val_len, 100) >= val_len) {
 			*value_ret = convert_signed_value(cval, snd_usb_combine_bytes(buf, val_len));
 			return 0;
@@ -313,6 +312,7 @@ static int get_ctl_value_v1(struct usb_mixer_elem_info *cval, int request, int v
 
 static int get_ctl_value_v2(struct usb_mixer_elem_info *cval, int request, int validx, int *value_ret)
 {
+	struct snd_usb_audio *chip = cval->mixer->chip;
 	unsigned char buf[2 + 3*sizeof(__u16)]; /* enough space for one range */
 	unsigned char *val;
 	int ret, size;
@@ -328,16 +328,14 @@ static int get_ctl_value_v2(struct usb_mixer_elem_info *cval, int request, int v
 
 	memset(buf, 0, sizeof(buf));
 
-	ret = snd_usb_ctl_msg(cval->mixer->chip->dev,
-			      usb_rcvctrlpipe(cval->mixer->chip->dev, 0),
-			      bRequest,
+	ret = snd_usb_ctl_msg(chip->dev, usb_rcvctrlpipe(chip->dev, 0), bRequest,
 			      USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN,
-			      validx, cval->mixer->ctrlif | (cval->id << 8),
+			      validx, snd_usb_ctrl_intf(chip) | (cval->id << 8),
 			      buf, size, 1000);
 
 	if (ret < 0) {
 		snd_printk(KERN_ERR "cannot get ctl value: req = %#x, wValue = %#x, wIndex = %#x, type = %d\n",
-			   request, validx, cval->mixer->ctrlif | (cval->id << 8), cval->val_type);
+			   request, validx, snd_usb_ctrl_intf(chip) | (cval->id << 8), cval->val_type);
 		return ret;
 	}
 
@@ -413,6 +411,7 @@ static int get_cur_mix_value(struct usb_mixer_elem_info *cval,
 int snd_usb_mixer_set_ctl_value(struct usb_mixer_elem_info *cval,
 				int request, int validx, int value_set)
 {
+	struct snd_usb_audio *chip = cval->mixer->chip;
 	unsigned char buf[2];
 	int val_len, timeout = 10;
 
@@ -435,15 +434,14 @@ int snd_usb_mixer_set_ctl_value(struct usb_mixer_elem_info *cval,
 	buf[0] = value_set & 0xff;
 	buf[1] = (value_set >> 8) & 0xff;
 	while (timeout-- > 0)
-		if (snd_usb_ctl_msg(cval->mixer->chip->dev,
-				    usb_sndctrlpipe(cval->mixer->chip->dev, 0),
-				    request,
+		if (snd_usb_ctl_msg(chip->dev,
+				    usb_sndctrlpipe(chip->dev, 0), request,
 				    USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_OUT,
-				    validx, cval->mixer->ctrlif | (cval->id << 8),
+				    validx, snd_usb_ctrl_intf(chip) | (cval->id << 8),
 				    buf, val_len, 100) >= 0)
 			return 0;
 	snd_printdd(KERN_ERR "cannot set ctl value: req = %#x, wValue = %#x, wIndex = %#x, type = %d, data = %#x/%#x\n",
-		    request, validx, cval->mixer->ctrlif | (cval->id << 8), cval->val_type, buf[0], buf[1]);
+		    request, validx, snd_usb_ctrl_intf(chip) | (cval->id << 8), cval->val_type, buf[0], buf[1]);
 	return -EINVAL;
 }
 
@@ -761,6 +759,8 @@ static void usb_mixer_elem_free(struct snd_kcontrol *kctl)
  */
 static int get_min_max(struct usb_mixer_elem_info *cval, int default_min)
 {
+	struct snd_usb_audio *chip = cval->mixer->chip;
+
 	/* for failsafe */
 	cval->min = default_min;
 	cval->max = cval->min + 1;
@@ -783,7 +783,7 @@ static int get_min_max(struct usb_mixer_elem_info *cval, int default_min)
 		if (get_ctl_value(cval, UAC_GET_MAX, (cval->control << 8) | minchn, &cval->max) < 0 ||
 		    get_ctl_value(cval, UAC_GET_MIN, (cval->control << 8) | minchn, &cval->min) < 0) {
 			snd_printd(KERN_ERR "%d:%d: cannot get min/max values for control %d (id %d)\n",
-				   cval->id, cval->mixer->ctrlif, cval->control, cval->id);
+				   cval->id, snd_usb_ctrl_intf(chip), cval->control, cval->id);
 			return -EINVAL;
 		}
 		if (get_ctl_value(cval, UAC_GET_RES, (cval->control << 8) | minchn, &cval->res) < 0) {
@@ -1913,7 +1913,7 @@ static int snd_usb_mixer_controls(struct usb_mixer_interface *mixer)
 	struct usb_host_interface *hostif;
 	void *p;
 
-	hostif = &usb_ifnum_to_if(mixer->chip->dev, mixer->ctrlif)->altsetting[0];
+	hostif = mixer->chip->ctrl_intf;
 	memset(&state, 0, sizeof(state));
 	state.chip = mixer->chip;
 	state.mixer = mixer;
@@ -2005,7 +2005,7 @@ static void snd_usb_mixer_proc_read(struct snd_info_entry *entry,
 	list_for_each_entry(mixer, &chip->mixer_list, list) {
 		snd_iprintf(buffer,
 			"USB Mixer: usb_id=0x%08x, ctrlif=%i, ctlerr=%i\n",
-				chip->usb_id, mixer->ctrlif,
+				chip->usb_id, snd_usb_ctrl_intf(chip),
 				mixer->ignore_ctl_error);
 		snd_iprintf(buffer, "Card: %s\n", chip->card->longname);
 		for (unitid = 0; unitid < MAX_ID_ELEMS; unitid++) {
@@ -2123,7 +2123,7 @@ static int snd_usb_mixer_status_create(struct usb_mixer_interface *mixer)
 	int buffer_length;
 	unsigned int epnum;
 
-	hostif = &usb_ifnum_to_if(mixer->chip->dev, mixer->ctrlif)->altsetting[0];
+	hostif = mixer->chip->ctrl_intf;
 	/* we need one interrupt input endpoint */
 	if (get_iface_desc(hostif)->bNumEndpoints < 1)
 		return 0;
@@ -2166,7 +2166,6 @@ int snd_usb_create_mixer(struct snd_usb_audio *chip, int ctrlif,
 	if (!mixer)
 		return -ENOMEM;
 	mixer->chip = chip;
-	mixer->ctrlif = ctrlif;
 	mixer->ignore_ctl_error = ignore_error;
 	mixer->id_elems = kcalloc(MAX_ID_ELEMS, sizeof(*mixer->id_elems),
 				  GFP_KERNEL);