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ALSA: ice1724: ESI W192M: Add sampling rate control of the ADC/DAC 

Add sampling rate control for ADC/DAC for ESI W192M.
Allow to switch between 48K/96K/192K sampling rate.
All DAC need to be mute when changing samplerate.

Signed-off-by: Clément Guedez <klem.dev@gmail.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Clément Guedez 2015-03-18 02:26:31 +01:00 committed by Takashi Iwai
parent ae8a9a1125
commit 1aa9a4ea4f
1 changed files with 107 additions and 0 deletions
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107
sound/pci/ice1712/wtm.c
View File

@ -30,12 +30,18 @@
#include <linux/init.h>
#include <sound/core.h>
#include <sound/tlv.h>
#include <linux/slab.h>
#include "ice1712.h"
#include "envy24ht.h"
#include "wtm.h"
#include "stac946x.h"
struct wtm_spec {
/* rate change needs atomic mute/unmute of all dacs*/
struct mutex mute_mutex;
};
/*
* 2*ADC 6*DAC no1 ringbuffer r/w on i2c bus
@ -69,15 +75,65 @@ static inline unsigned char stac9460_2_get(struct snd_ice1712 *ice, int reg)
/*
* DAC mute control
*/
static void stac9460_dac_mute_all(struct snd_ice1712 *ice, unsigned char mute,
unsigned short int *change_mask)
{
unsigned char new, old;
int id, idx, change;
/*stac9460 1*/
for (id = 0; id < 7; id++) {
if (*change_mask & (0x01 << id)) {
if (id == 0)
idx = STAC946X_MASTER_VOLUME;
else
idx = STAC946X_LF_VOLUME - 1 + id;
old = stac9460_get(ice, idx);
new = (~mute << 7 & 0x80) | (old & ~0x80);
change = (new != old);
if (change) {
stac9460_put(ice, idx, new);
*change_mask = *change_mask | (0x01 << id);
} else {
*change_mask = *change_mask & ~(0x01 << id);
}
}
}
/*stac9460 2*/
for (id = 0; id < 3; id++) {
if (*change_mask & (0x01 << (id + 7))) {
if (id == 0)
idx = STAC946X_MASTER_VOLUME;
else
idx = STAC946X_LF_VOLUME - 1 + id;
old = stac9460_2_get(ice, idx);
new = (~mute << 7 & 0x80) | (old & ~0x80);
change = (new != old);
if (change) {
stac9460_2_put(ice, idx, new);
*change_mask = *change_mask | (0x01 << id);
} else {
*change_mask = *change_mask & ~(0x01 << id);
}
}
}
}
#define stac9460_dac_mute_info snd_ctl_boolean_mono_info
static int stac9460_dac_mute_get(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_ice1712 *ice = snd_kcontrol_chip(kcontrol);
struct wtm_spec *spec = ice->spec;
unsigned char val;
int idx, id;
mutex_lock(&spec->mute_mutex);
if (kcontrol->private_value) {
idx = STAC946X_MASTER_VOLUME;
id = 0;
@ -90,6 +146,8 @@ static int stac9460_dac_mute_get(struct snd_kcontrol *kcontrol,
else
val = stac9460_2_get(ice, idx - 6);
ucontrol->value.integer.value[0] = (~val >> 7) & 0x1;
mutex_unlock(&spec->mute_mutex);
return 0;
}
@ -388,6 +446,44 @@ static int stac9460_mic_sw_put(struct snd_kcontrol *kcontrol,
}
/*
* Handler for setting correct codec rate - called when rate change is detected
*/
static void stac9460_set_rate_val(struct snd_ice1712 *ice, unsigned int rate)
{
unsigned char old, new;
unsigned short int changed;
struct wtm_spec *spec = ice->spec;
if (rate == 0) /* no hint - S/PDIF input is master, simply return */
return;
else if (rate <= 48000)
new = 0x08; /* 256x, base rate mode */
else if (rate <= 96000)
new = 0x11; /* 256x, mid rate mode */
else
new = 0x12; /* 128x, high rate mode */
old = stac9460_get(ice, STAC946X_MASTER_CLOCKING);
if (old == new)
return;
/* change detected, setting master clock, muting first */
/* due to possible conflicts with mute controls - mutexing */
mutex_lock(&spec->mute_mutex);
/* we have to remember current mute status for each DAC */
changed = 0xFFFF;
stac9460_dac_mute_all(ice, 0, &changed);
/*printk(KERN_DEBUG "Rate change: %d, new MC: 0x%02x\n", rate, new);*/
stac9460_put(ice, STAC946X_MASTER_CLOCKING, new);
stac9460_2_put(ice, STAC946X_MASTER_CLOCKING, new);
udelay(10);
/* unmuting - only originally unmuted dacs -
* i.e. those changed when muting */
stac9460_dac_mute_all(ice, 1, &changed);
mutex_unlock(&spec->mute_mutex);
}
/*Limits value in dB for fader*/
static const DECLARE_TLV_DB_SCALE(db_scale_dac, -19125, 75, 0);
static const DECLARE_TLV_DB_SCALE(db_scale_adc, 0, 150, 0);
@ -487,21 +583,32 @@ static int wtm_init(struct snd_ice1712 *ice)
{
static unsigned short stac_inits_wtm[] = {
STAC946X_RESET, 0,
STAC946X_MASTER_CLOCKING, 0x11,
(unsigned short)-1
};
unsigned short *p;
struct wtm_spec *spec;
/*WTM 192M*/
ice->num_total_dacs = 8;
ice->num_total_adcs = 4;
ice->force_rdma1 = 1;
/*init mutex for dac mute conflict*/
spec = kzalloc(sizeof(*spec), GFP_KERNEL);
if (!spec)
return -ENOMEM;
ice->spec = spec;
mutex_init(&spec->mute_mutex);
/*initialize codec*/
p = stac_inits_wtm;
for (; *p != (unsigned short)-1; p += 2) {
stac9460_put(ice, p[0], p[1]);
stac9460_2_put(ice, p[0], p[1]);
}
ice->gpio.set_pro_rate = stac9460_set_rate_val;
return 0;
}