diff options
| -rw-r--r-- | sound/pci/cs5535audio/Makefile | 4 | ||||
| -rw-r--r-- | sound/pci/cs5535audio/cs5535audio.c | 7 | ||||
| -rw-r--r-- | sound/pci/cs5535audio/cs5535audio.h | 9 | ||||
| -rw-r--r-- | sound/pci/cs5535audio/cs5535audio_olpc.c | 113 |
4 files changed, 133 insertions, 0 deletions
diff --git a/sound/pci/cs5535audio/Makefile b/sound/pci/cs5535audio/Makefile index bb3d57e6a3cb..3e41fd39780d 100644 --- a/sound/pci/cs5535audio/Makefile +++ b/sound/pci/cs5535audio/Makefile @@ -5,5 +5,9 @@ snd-cs5535audio-y := cs5535audio.o cs5535audio_pcm.o snd-cs5535audio-$(CONFIG_PM) += cs5535audio_pm.o +ifdef CONFIG_OLPC +snd-cs5535audio-objs += cs5535audio_olpc.o +endif + # Toplevel Module Dependency obj-$(CONFIG_SND_CS5535AUDIO) += snd-cs5535audio.o diff --git a/sound/pci/cs5535audio/cs5535audio.c b/sound/pci/cs5535audio/cs5535audio.c index 6c886edd06db..50333bb9242c 100644 --- a/sound/pci/cs5535audio/cs5535audio.c +++ b/sound/pci/cs5535audio/cs5535audio.c @@ -171,6 +171,13 @@ static int __devinit snd_cs5535audio_mixer(struct cs5535audio *cs5535au) snd_ac97_tune_hardware(cs5535au->ac97, ac97_quirks, ac97_quirk); + /* olpc_quirks is dummied out if not olpc */ + err = olpc_quirks(card, cs5535au->ac97); + if (err < 0) { + snd_printk(KERN_ERR "olpc quirks failed\n"); + return err; + } + return 0; } diff --git a/sound/pci/cs5535audio/cs5535audio.h b/sound/pci/cs5535audio/cs5535audio.h index 1aa1e2bbdf74..adcb213eb276 100644 --- a/sound/pci/cs5535audio/cs5535audio.h +++ b/sound/pci/cs5535audio/cs5535audio.h @@ -92,6 +92,9 @@ struct cs5535audio { struct snd_pcm_substream *playback_substream; struct snd_pcm_substream *capture_substream; struct cs5535audio_dma dmas[NUM_CS5535AUDIO_DMAS]; +#ifdef CONFIG_OLPC + int ec_analog_input_mode; +#endif }; #ifdef CONFIG_PM @@ -99,6 +102,12 @@ int snd_cs5535audio_suspend(struct pci_dev *pci, pm_message_t state); int snd_cs5535audio_resume(struct pci_dev *pci); #endif +#ifdef CONFIG_OLPC +int olpc_quirks(struct snd_card *card, struct snd_ac97 *ac97); +#else +#define olpc_quirks(arg, arg2) (0) +#endif + int __devinit snd_cs5535audio_pcm(struct cs5535audio *cs5535audio); #endif /* __SOUND_CS5535AUDIO_H */ diff --git a/sound/pci/cs5535audio/cs5535audio_olpc.c b/sound/pci/cs5535audio/cs5535audio_olpc.c new file mode 100644 index 000000000000..4b72d8662ec9 --- /dev/null +++ b/sound/pci/cs5535audio/cs5535audio_olpc.c @@ -0,0 +1,113 @@ +#include <linux/olpc.h> +#include <sound/driver.h> +#include <sound/core.h> +#include <sound/info.h> +#include <sound/control.h> +#include <sound/ac97_codec.h> +#include "cs5535audio.h" + +/* OLPC has an additional feature on top of regular AD1888 codec +features. This is support for an analog input mode. This is a +2 step process. First, to turn off the AD1888 codec bias voltage +and high pass filter. Second, to tell the embedded controller to +reroute from a capacitive trace to a direct trace using an analog +switch. The *_ec()s are what talk to that controller */ + +static int snd_cs5535audio_ctl_info(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_info *uinfo) +{ + uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN; + uinfo->count = 1; + uinfo->value.integer.min = 0; + uinfo->value.integer.max = 1; + return 0; +} + +#define AD1888_VREFOUT_EN_BIT (1 << 2) +#define AD1888_HPF_EN_BIT (1 << 12) +static int snd_cs5535audio_ctl_get(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_value *ucontrol) +{ + struct cs5535audio *cs5535au = snd_kcontrol_chip(kcontrol); + u16 reg1, reg2; + + /* if either AD1888 VRef Bias and High Pass Filter are enabled + or the EC is not in analog mode then flag as not in analog mode. + No EC command to read current analog state so we cache that. */ + reg1 = snd_ac97_read(cs5535au->ac97, AC97_AD_MISC); + reg2 = snd_ac97_read(cs5535au->ac97, AC97_AD_TEST2); + + if ((reg1 & AD1888_VREFOUT_EN_BIT) && (reg2 & AD1888_HPF_EN_BIT) && + cs5535au->ec_analog_input_mode) + ucontrol->value.integer.value[0] = 1; + else + ucontrol->value.integer.value[0] = 0; + + return 0; +} + +static int snd_cs5535audio_ctl_put(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_value *ucontrol) +{ + int err; + struct cs5535audio *cs5535au = snd_kcontrol_chip(kcontrol); + u8 value; + struct snd_ac97 *ac97 = cs5535au->ac97; + + /* value is 1 if analog input is desired */ + value = ucontrol->value.integer.value[0]; + + /* use ec mode as flag to determine if any change needed */ + if (cs5535au->ec_analog_input_mode == value) + return 0; + + /* sets High Z on VREF Bias if 1 */ + if (value) + err = snd_ac97_update_bits(ac97, AC97_AD_MISC, + AD1888_VREFOUT_EN_BIT, AD1888_VREFOUT_EN_BIT); + else + err = snd_ac97_update_bits(ac97, AC97_AD_MISC, + AD1888_VREFOUT_EN_BIT, 0); + if (err < 0) + snd_printk(KERN_ERR "Error updating AD_MISC %d\n", err); + + /* turns off High Pass Filter if 1 */ + if (value) + err = snd_ac97_update_bits(ac97, AC97_AD_TEST2, + AD1888_HPF_EN_BIT, AD1888_HPF_EN_BIT); + else + err = snd_ac97_update_bits(ac97, AC97_AD_TEST2, + AD1888_HPF_EN_BIT, 0); + if (err < 0) + snd_printk(KERN_ERR "Error updating AD_TEST2 %d\n", err); + + if (value) + err = write_ec_command(0x01); /* activate MIC_AC_OFF */ + else + err = write_ec_command(0x02); /* deactivates MIC_AC_OFF */ + + if (err < 0) + snd_printk(KERN_ERR "Error talking to EC %d\n", err); + + cs5535au->ec_analog_input_mode = value; + + return 1; +} + +static struct snd_kcontrol_new snd_cs5535audio_controls __devinitdata = +{ + .iface = SNDRV_CTL_ELEM_IFACE_MIXER, + .name = "Analog Input Switch", + .info = snd_cs5535audio_ctl_info, + .get = snd_cs5535audio_ctl_get, + .put = snd_cs5535audio_ctl_put, + .private_value = 0 +}; + +int __devinit olpc_quirks(struct snd_card *card, struct snd_ac97 *ac97) +{ + /* setup callback for mixer control that does analog input mode */ + return snd_ctl_add(card, snd_ctl_new1(&snd_cs5535audio_controls, + ac97->private_data)); +} + |