diff options
| author |   Daniel Mack <daniel@caiaq.de> | 2010-05-26 18:11:39 +0200 |
|---|---|---|
| committer |   Takashi Iwai <tiwai@suse.de> | 2010-05-27 09:49:37 +0200 |
| commit | 92c256110fa9566de639ef8948b4fb430aa495b3 (patch) | |
| tree | e20254c319911c02a9973280f4d678f13ff96584 /sound | |
| parent | ALSA: usb-audio: parse UAC2 endpoint descriptors correctly (diff) | |
| download | linux-dev-92c256110fa9566de639ef8948b4fb430aa495b3.tar.xz linux-dev-92c256110fa9566de639ef8948b4fb430aa495b3.zip | |
ALSA: usb-audio: add support for UAC2 pitch control
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>
Diffstat (limited to 'sound')
| -rw-r--r-- | sound/usb/pcm.c | 37 |
1 files changed, 30 insertions, 7 deletions
diff --git a/sound/usb/pcm.c b/sound/usb/pcm.c index 2bf0d77d1768..056587de7be4 100644 --- a/sound/usb/pcm.c +++ b/sound/usb/pcm.c @@ -120,10 +120,6 @@ static int init_pitch_v1(struct snd_usb_audio *chip, int iface, 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; if ((err = snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), UAC_SET_CUR, 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; } +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, 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); + /* if endpoint doesn't have pitch control, bail out */ + if (!(fmt->attributes & UAC_EP_CS_ATTR_PITCH_CONTROL)) + return 0; + switch (altsd->bInterfaceProtocol) { case UAC_VERSION_1: return init_pitch_v1(chip, iface, alts, fmt); case UAC_VERSION_2: - /* not implemented yet */ - return 0; + return init_pitch_v2(chip, iface, alts, fmt); } return -EINVAL; |