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ALSA: usb-audio: add support for UAC2 pitch control

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This request is again handled differently in comparison to UAC1.

Signed-off-by: Daniel Mack <daniel@caiaq.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Daniel Mack 2010-05-26 18:11:39 +02:00 committed by Takashi Iwai
parent 43b8e3bc4a
commit 92c256110f
1 changed files with 30 additions and 7 deletions
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37
sound/usb/pcm.c
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@ -120,10 +120,6 @@ static int init_pitch_v1(struct snd_usb_audio *chip, int iface,
ep = get_endpoint(alts, 0)->bEndpointAddress; ep = get_endpoint(alts, 0)->bEndpointAddress;
/* if endpoint doesn't have pitch control, bail out */
if (!(fmt->attributes & UAC_EP_CS_ATTR_PITCH_CONTROL))
return 0;
data[0] = 1; data[0] = 1;
if ((err = snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), UAC_SET_CUR, if ((err = snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), UAC_SET_CUR,
USB_TYPE_CLASS|USB_RECIP_ENDPOINT|USB_DIR_OUT, USB_TYPE_CLASS|USB_RECIP_ENDPOINT|USB_DIR_OUT,
@ -137,8 +133,32 @@ static int init_pitch_v1(struct snd_usb_audio *chip, int iface,
return 0; return 0;
} }
static int init_pitch_v2(struct snd_usb_audio *chip, int iface,
struct usb_host_interface *alts,
struct audioformat *fmt)
{
struct usb_device *dev = chip->dev;
unsigned char data[1];
unsigned int ep;
int err;
ep = get_endpoint(alts, 0)->bEndpointAddress;
data[0] = 1;
if ((err = snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), UAC2_CS_CUR,
USB_TYPE_CLASS | USB_RECIP_ENDPOINT | USB_DIR_OUT,
UAC2_EP_CS_PITCH << 8, 0,
data, sizeof(data), 1000)) < 0) {
snd_printk(KERN_ERR "%d:%d:%d: cannot set enable PITCH (v2)\n",
dev->devnum, iface, fmt->altsetting);
return err;
}
return 0;
}
/* /*
* initialize the picth control and sample rate * initialize the pitch control and sample rate
*/ */
int snd_usb_init_pitch(struct snd_usb_audio *chip, int iface, int snd_usb_init_pitch(struct snd_usb_audio *chip, int iface,
struct usb_host_interface *alts, struct usb_host_interface *alts,
@ -146,13 +166,16 @@ int snd_usb_init_pitch(struct snd_usb_audio *chip, int iface,
{ {
struct usb_interface_descriptor *altsd = get_iface_desc(alts); struct usb_interface_descriptor *altsd = get_iface_desc(alts);
/* if endpoint doesn't have pitch control, bail out */
if (!(fmt->attributes & UAC_EP_CS_ATTR_PITCH_CONTROL))
return 0;
switch (altsd->bInterfaceProtocol) { switch (altsd->bInterfaceProtocol) {
case UAC_VERSION_1: case UAC_VERSION_1:
return init_pitch_v1(chip, iface, alts, fmt); return init_pitch_v1(chip, iface, alts, fmt);
case UAC_VERSION_2: case UAC_VERSION_2:
/* not implemented yet */ return init_pitch_v2(chip, iface, alts, fmt);
return 0;
} }
return -EINVAL; return -EINVAL;