From: Sam Revitch Date: Fri, 23 Jun 2006 13:10:18 +0000 (+0200) Subject: [ALSA] usb-audio support for Turtle Beach Roadie X-Git-Tag: v2.6.18-rc1~357^2~19 X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=e217e30c359edafce3225d2c4fbbda06ae5a408b;p=linux-2.6 [ALSA] usb-audio support for Turtle Beach Roadie From: Sam Revitch Recently a Turtle Beach Audio Advantage Roadie device ended up in my possession. It seems to work with the snd-usb-audio driver, but only using the headphone jack in 2-channel mode. The device has a DIN connector carrying six more channels that are otherwise silent. C-Media has freely available documentation for the CM106 chip around which this device is based, and enabling 8-channel output, or 6-channel output with the headphone jack following the front pair is a matter of setting one of its registers. Attached is a patch to try to enable 5.1 output mode at probe time. It seems to work correctly with my device. There is quite list of other configurables for this device that might deserve controls. Signed-off-by: Takashi Iwai Signed-off-by: Jaroslav Kysela --- diff --git a/sound/usb/usbaudio.c b/sound/usb/usbaudio.c index 627de9525a..d32d83d970 100644 --- a/sound/usb/usbaudio.c +++ b/sound/usb/usbaudio.c @@ -3095,6 +3095,32 @@ static int snd_usb_audigy2nx_boot_quirk(struct usb_device *dev) return 0; } +/* + * C-Media CM106/CM106+ have four 16-bit internal registers that are nicely + * documented in the device's data sheet. + */ +static int snd_usb_cm106_write_int_reg(struct usb_device *dev, int reg, u16 value) +{ + u8 buf[4]; + buf[0] = 0x20; + buf[1] = value & 0xff; + buf[2] = (value >> 8) & 0xff; + buf[3] = reg; + return snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), USB_REQ_SET_CONFIGURATION, + USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_ENDPOINT, + 0, 0, &buf, 4, 1000); +} + +static int snd_usb_cm106_boot_quirk(struct usb_device *dev) +{ + /* + * Enable line-out driver mode, set headphone source to front + * channels, enable stereo mic. + */ + return snd_usb_cm106_write_int_reg(dev, 2, 0x8004); +} + + /* * Setup quirks */ @@ -3365,6 +3391,12 @@ static void *snd_usb_audio_probe(struct usb_device *dev, goto __err_val; } + /* C-Media CM106 / Turtle Beach Audio Advantage Roadie */ + if (id == USB_ID(0x10f5, 0x0200)) { + if (snd_usb_cm106_boot_quirk(dev) < 0) + goto __err_val; + } + /* * found a config. now register to ALSA */