diff options
Diffstat (limited to 'sound/pci/ac97/ac97_patch.c')
| -rw-r--r-- | sound/pci/ac97/ac97_patch.c | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/sound/pci/ac97/ac97_patch.c b/sound/pci/ac97/ac97_patch.c index 094cfc1f3a1..5267b006c5c 100644 --- a/sound/pci/ac97/ac97_patch.c +++ b/sound/pci/ac97/ac97_patch.c @@ -2872,3 +2872,41 @@ int patch_lm4550(struct snd_ac97 *ac97) ac97->res_table = lm4550_restbl; return 0; } + +/* + * UCB1400 codec (http://www.semiconductors.philips.com/acrobat_download/datasheets/UCB1400-02.pdf) + */ +static const struct snd_kcontrol_new snd_ac97_controls_ucb1400[] = { +/* enable/disable headphone driver which allows direct connection to + stereo headphone without the use of external DC blocking + capacitors */ +AC97_SINGLE("Headphone Driver", 0x6a, 6, 1, 0), +/* Filter used to compensate the DC offset is added in the ADC to remove idle + tones from the audio band. */ +AC97_SINGLE("DC Filter", 0x6a, 4, 1, 0), +/* Control smart-low-power mode feature. Allows automatic power down + of unused blocks in the ADC analog front end and the PLL. */ +AC97_SINGLE("Smart Low Power Mode", 0x6c, 4, 3, 0), +}; + +static int patch_ucb1400_specific(struct snd_ac97 * ac97) +{ + int idx, err; + for (idx = 0; idx < ARRAY_SIZE(snd_ac97_controls_ucb1400); idx++) + if ((err = snd_ctl_add(ac97->bus->card, snd_ctl_new1(&snd_ac97_controls_ucb1400[idx], ac97))) < 0) + return err; + return 0; +} + +static struct snd_ac97_build_ops patch_ucb1400_ops = { + .build_specific = patch_ucb1400_specific, +}; + +int patch_ucb1400(struct snd_ac97 * ac97) +{ + ac97->build_ops = &patch_ucb1400_ops; + /* enable headphone driver and smart low power mode by default */ + snd_ac97_write(ac97, 0x6a, 0x0050); + snd_ac97_write(ac97, 0x6c, 0x0030); + return 0; +} |