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>
diff --git a/sound/usb/mixer.c b/sound/usb/mixer.c
index 1163ec3..035a77b 100644
--- a/sound/usb/mixer.c
+++ b/sound/usb/mixer.c
@@ -291,16 +291,15 @@
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_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 @@
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 @@
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 @@
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 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 @@
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 @@
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 @@
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 @@
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 @@
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);