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-rw-r--r--sound/usb/usbaudio.c25
1 files changed, 25 insertions, 0 deletions
diff --git a/sound/usb/usbaudio.c b/sound/usb/usbaudio.c
index a6b88482637b..e87121751dd0 100644
--- a/sound/usb/usbaudio.c
+++ b/sound/usb/usbaudio.c
@@ -3279,6 +3279,25 @@ static int snd_usb_cm106_boot_quirk(struct usb_device *dev)
3279 return snd_usb_cm106_write_int_reg(dev, 2, 0x8004); 3279 return snd_usb_cm106_write_int_reg(dev, 2, 0x8004);
3280} 3280}
3281 3281
3282/*
3283 * C-Media CM6206 is based on CM106 with two additional
3284 * registers that are not documented in the data sheet.
3285 * Values here are chosen based on sniffing USB traffic
3286 * under Windows.
3287 */
3288static int snd_usb_cm6206_boot_quirk(struct usb_device *dev)
3289{
3290 int err, reg;
3291 int val[] = {0x200c, 0x3000, 0xf800, 0x143f, 0x0000, 0x3000};
3292
3293 for (reg = 0; reg < ARRAY_SIZE(val); reg++) {
3294 err = snd_usb_cm106_write_int_reg(dev, reg, val[reg]);
3295 if (err < 0)
3296 return err;
3297 }
3298
3299 return err;
3300}
3282 3301
3283/* 3302/*
3284 * Setup quirks 3303 * Setup quirks
@@ -3565,6 +3584,12 @@ static void *snd_usb_audio_probe(struct usb_device *dev,
3565 goto __err_val; 3584 goto __err_val;
3566 } 3585 }
3567 3586
3587 /* C-Media CM6206 / CM106-Like Sound Device */
3588 if (id == USB_ID(0x0d8c, 0x0102)) {
3589 if (snd_usb_cm6206_boot_quirk(dev) < 0)
3590 goto __err_val;
3591 }
3592
3568 /* 3593 /*
3569 * found a config. now register to ALSA 3594 * found a config. now register to ALSA
3570 */ 3595 */