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linux/sound/soc/codecs/tlv320dac33.c
Peter Ujfalusi c8bf93f0fe ASoC: Codec driver for Texas Instruments tlv320dac33 codec 
Driver for Texas Instruments TLV320DAC33 (SLAS546) low power stereo
audio DAC.

TLV320DAC33 is a stereo audio codec with integrated 24KB FIFO for low
power audio playback.

The digital interface can use I2S, DSP (A or B), Right and Left
justified formats.
DAC33 has stereo analog input, which can be bypassed to the analog
outputs.

Regarding to the internal 24KB FIFO the driver implements 'FIFO bypass'
mode (default) and nSample mode (FIFO is in use).
a) In 'FIFO bypass' mode the internal FIFO is not in use, the codec is
working synchronously as a normal codec (it needs constant stream of
data on the digital interface).

b) The nSample mode implementation uses one interrupt line from DAC33 to
the host:
Alarm threshold is set to 10ms of audio data (limit by the driver
implementation).
DAC33 will signal an interrupt, when the FIFO level goes under the
Alarm threshold.
The host will write to nSample register a value (number of stereo
samples), to tell DAC33 how many samples it should read in a burst from
the host. When the DAC33 received the number of samples, it disables the
clocks on the I2S bus. When the FIFO use again goes under the Alarm
threshold, DAC33 signals the host with an interrupt, and the process is
repeated.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@nokia.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
2009-10-15 15:02:04 +01:00

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/*
* ALSA SoC Texas Instruments TLV320DAC33 codec driver
*
* Author: Peter Ujfalusi <peter.ujfalusi@nokia.com>
*
* Copyright: (C) 2009 Nokia Corporation
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA
*
*/
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/pm.h>
#include <linux/i2c.h>
#include <linux/platform_device.h>
#include <linux/interrupt.h>
#include <linux/gpio.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include <sound/soc-dapm.h>
#include <sound/initval.h>
#include <sound/tlv.h>
#include <sound/tlv320dac33-plat.h>
#include "tlv320dac33.h"
#define DAC33_BUFFER_SIZE_BYTES 24576 /* bytes, 12288 16 bit words,
* 6144 stereo */
#define DAC33_BUFFER_SIZE_SAMPLES 6144
#define NSAMPLE_MAX 5700
#define LATENCY_TIME_MS 20
static struct snd_soc_codec *tlv320dac33_codec;
enum dac33_state {
DAC33_IDLE = 0,
DAC33_PREFILL,
DAC33_PLAYBACK,
DAC33_FLUSH,
};
struct tlv320dac33_priv {
struct mutex mutex;
struct workqueue_struct *dac33_wq;
struct work_struct work;
struct snd_soc_codec codec;
int power_gpio;
int chip_power;
int irq;
unsigned int refclk;
unsigned int alarm_threshold; /* set to be half of LATENCY_TIME_MS */
unsigned int nsample_min; /* nsample should not be lower than
* this */
unsigned int nsample_max; /* nsample should not be higher than
* this */
unsigned int nsample_switch; /* Use FIFO or bypass FIFO switch */
unsigned int nsample; /* burst read amount from host */
enum dac33_state state;
};
static const u8 dac33_reg[DAC33_CACHEREGNUM] = {
0x00, 0x00, 0x00, 0x00, /* 0x00 - 0x03 */
0x00, 0x00, 0x00, 0x00, /* 0x04 - 0x07 */
0x00, 0x00, 0x00, 0x00, /* 0x08 - 0x0b */
0x00, 0x00, 0x00, 0x00, /* 0x0c - 0x0f */
0x00, 0x00, 0x00, 0x00, /* 0x10 - 0x13 */
0x00, 0x00, 0x00, 0x00, /* 0x14 - 0x17 */
0x00, 0x00, 0x00, 0x00, /* 0x18 - 0x1b */
0x00, 0x00, 0x00, 0x00, /* 0x1c - 0x1f */
0x00, 0x00, 0x00, 0x00, /* 0x20 - 0x23 */
0x00, 0x00, 0x00, 0x00, /* 0x24 - 0x27 */
0x00, 0x00, 0x00, 0x00, /* 0x28 - 0x2b */
0x00, 0x00, 0x00, 0x80, /* 0x2c - 0x2f */
0x80, 0x00, 0x00, 0x00, /* 0x30 - 0x33 */
0x00, 0x00, 0x00, 0x00, /* 0x34 - 0x37 */
0x00, 0x00, /* 0x38 - 0x39 */
/* Registers 0x3a - 0x3f are reserved */
0x00, 0x00, /* 0x3a - 0x3b */
0x00, 0x00, 0x00, 0x00, /* 0x3c - 0x3f */
0x00, 0x00, 0x00, 0x00, /* 0x40 - 0x43 */
0x00, 0x80, /* 0x44 - 0x45 */
/* Registers 0x46 - 0x47 are reserved */
0x80, 0x80, /* 0x46 - 0x47 */
0x80, 0x00, 0x00, /* 0x48 - 0x4a */
/* Registers 0x4b - 0x7c are reserved */
0x00, /* 0x4b */
0x00, 0x00, 0x00, 0x00, /* 0x4c - 0x4f */
0x00, 0x00, 0x00, 0x00, /* 0x50 - 0x53 */
0x00, 0x00, 0x00, 0x00, /* 0x54 - 0x57 */
0x00, 0x00, 0x00, 0x00, /* 0x58 - 0x5b */
0x00, 0x00, 0x00, 0x00, /* 0x5c - 0x5f */
0x00, 0x00, 0x00, 0x00, /* 0x60 - 0x63 */
0x00, 0x00, 0x00, 0x00, /* 0x64 - 0x67 */
0x00, 0x00, 0x00, 0x00, /* 0x68 - 0x6b */
0x00, 0x00, 0x00, 0x00, /* 0x6c - 0x6f */
0x00, 0x00, 0x00, 0x00, /* 0x70 - 0x73 */
0x00, 0x00, 0x00, 0x00, /* 0x74 - 0x77 */
0x00, 0x00, 0x00, 0x00, /* 0x78 - 0x7b */
0x00, /* 0x7c */
0xda, 0x33, 0x03, /* 0x7d - 0x7f */
};
/* Register read and write */
static inline unsigned int dac33_read_reg_cache(struct snd_soc_codec *codec,
unsigned reg)
{
u8 *cache = codec->reg_cache;
if (reg >= DAC33_CACHEREGNUM)
return 0;
return cache[reg];
}
static inline void dac33_write_reg_cache(struct snd_soc_codec *codec,
u8 reg, u8 value)
{
u8 *cache = codec->reg_cache;
if (reg >= DAC33_CACHEREGNUM)
return;
cache[reg] = value;
}
static int dac33_read(struct snd_soc_codec *codec, unsigned int reg,
u8 *value)
{
struct tlv320dac33_priv *dac33 = codec->private_data;
int val;
*value = reg & 0xff;
/* If powered off, return the cached value */
if (dac33->chip_power) {
val = i2c_smbus_read_byte_data(codec->control_data, value[0]);
if (val < 0) {
dev_err(codec->dev, "Read failed (%d)\n", val);
value[0] = dac33_read_reg_cache(codec, reg);
} else {
value[0] = val;
dac33_write_reg_cache(codec, reg, val);
}
} else {
value[0] = dac33_read_reg_cache(codec, reg);
}
return 0;
}
static int dac33_write(struct snd_soc_codec *codec, unsigned int reg,
unsigned int value)
{
struct tlv320dac33_priv *dac33 = codec->private_data;
u8 data[2];
int ret = 0;
/*
* data is
* D15..D8 dac33 register offset
* D7...D0 register data
*/
data[0] = reg & 0xff;
data[1] = value & 0xff;
dac33_write_reg_cache(codec, data[0], data[1]);
if (dac33->chip_power) {
ret = codec->hw_write(codec->control_data, data, 2);
if (ret != 2)
dev_err(codec->dev, "Write failed (%d)\n", ret);
else
ret = 0;
}
return ret;
}
static int dac33_write_locked(struct snd_soc_codec *codec, unsigned int reg,
unsigned int value)
{
struct tlv320dac33_priv *dac33 = codec->private_data;
int ret;
mutex_lock(&dac33->mutex);
ret = dac33_write(codec, reg, value);
mutex_unlock(&dac33->mutex);
return ret;
}
#define DAC33_I2C_ADDR_AUTOINC 0x80
static int dac33_write16(struct snd_soc_codec *codec, unsigned int reg,
unsigned int value)
{
struct tlv320dac33_priv *dac33 = codec->private_data;
u8 data[3];
int ret = 0;
/*
* data is
* D23..D16 dac33 register offset
* D15..D8 register data MSB
* D7...D0 register data LSB
*/
data[0] = reg & 0xff;
data[1] = (value >> 8) & 0xff;
data[2] = value & 0xff;
dac33_write_reg_cache(codec, data[0], data[1]);
dac33_write_reg_cache(codec, data[0] + 1, data[2]);
if (dac33->chip_power) {
/* We need to set autoincrement mode for 16 bit writes */
data[0] |= DAC33_I2C_ADDR_AUTOINC;
ret = codec->hw_write(codec->control_data, data, 3);
if (ret != 3)
dev_err(codec->dev, "Write failed (%d)\n", ret);
else
ret = 0;
}
return ret;
}
static void dac33_restore_regs(struct snd_soc_codec *codec)
{
struct tlv320dac33_priv *dac33 = codec->private_data;
u8 *cache = codec->reg_cache;
u8 data[2];
int i, ret;
if (!dac33->chip_power)
return;
for (i = DAC33_PWR_CTRL; i <= DAC33_INTP_CTRL_B; i++) {
data[0] = i;
data[1] = cache[i];
/* Skip the read only registers */
if ((i >= DAC33_INT_OSC_STATUS &&
i <= DAC33_INT_OSC_FREQ_RAT_READ_B) ||
(i >= DAC33_FIFO_WPTR_MSB && i <= DAC33_FIFO_IRQ_FLAG) ||
i == DAC33_DAC_STATUS_FLAGS ||
i == DAC33_SRC_EST_REF_CLK_RATIO_A ||
i == DAC33_SRC_EST_REF_CLK_RATIO_B)
continue;
ret = codec->hw_write(codec->control_data, data, 2);
if (ret != 2)
dev_err(codec->dev, "Write failed (%d)\n", ret);
}
for (i = DAC33_LDAC_PWR_CTRL; i <= DAC33_LINEL_TO_LLO_VOL; i++) {
data[0] = i;
data[1] = cache[i];
ret = codec->hw_write(codec->control_data, data, 2);
if (ret != 2)
dev_err(codec->dev, "Write failed (%d)\n", ret);
}
for (i = DAC33_LINER_TO_RLO_VOL; i <= DAC33_OSC_TRIM; i++) {
data[0] = i;
data[1] = cache[i];
ret = codec->hw_write(codec->control_data, data, 2);
if (ret != 2)
dev_err(codec->dev, "Write failed (%d)\n", ret);
}
}
static inline void dac33_soft_power(struct snd_soc_codec *codec, int power)
{
u8 reg;
reg = dac33_read_reg_cache(codec, DAC33_PWR_CTRL);
if (power)
reg |= DAC33_PDNALLB;
else
reg &= ~DAC33_PDNALLB;
dac33_write(codec, DAC33_PWR_CTRL, reg);
}
static void dac33_hard_power(struct snd_soc_codec *codec, int power)
{
struct tlv320dac33_priv *dac33 = codec->private_data;
mutex_lock(&dac33->mutex);
if (power) {
if (dac33->power_gpio >= 0) {
gpio_set_value(dac33->power_gpio, 1);
dac33->chip_power = 1;
/* Restore registers */
dac33_restore_regs(codec);
}
dac33_soft_power(codec, 1);
} else {
dac33_soft_power(codec, 0);
if (dac33->power_gpio >= 0) {
gpio_set_value(dac33->power_gpio, 0);
dac33->chip_power = 0;
}
}
mutex_unlock(&dac33->mutex);
}
static int dac33_get_nsample(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
struct tlv320dac33_priv *dac33 = codec->private_data;
ucontrol->value.integer.value[0] = dac33->nsample;
return 0;
}
static int dac33_set_nsample(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
struct tlv320dac33_priv *dac33 = codec->private_data;
int ret = 0;
if (dac33->nsample == ucontrol->value.integer.value[0])
return 0;
if (ucontrol->value.integer.value[0] < dac33->nsample_min ||
ucontrol->value.integer.value[0] > dac33->nsample_max)
ret = -EINVAL;
else
dac33->nsample = ucontrol->value.integer.value[0];
return ret;
}
static int dac33_get_nsample_switch(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
struct tlv320dac33_priv *dac33 = codec->private_data;
ucontrol->value.integer.value[0] = dac33->nsample_switch;
return 0;
}
static int dac33_set_nsample_switch(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
struct tlv320dac33_priv *dac33 = codec->private_data;
int ret = 0;
if (dac33->nsample_switch == ucontrol->value.integer.value[0])
return 0;
/* Do not allow changes while stream is running*/
if (codec->active)
return -EPERM;
if (ucontrol->value.integer.value[0] < 0 ||
ucontrol->value.integer.value[0] > 1)
ret = -EINVAL;
else
dac33->nsample_switch = ucontrol->value.integer.value[0];
return ret;
}
/*
* DACL/R digital volume control:
* from 0 dB to -63.5 in 0.5 dB steps
* Need to be inverted later on:
* 0x00 == 0 dB
* 0x7f == -63.5 dB
*/
static DECLARE_TLV_DB_SCALE(dac_digivol_tlv, -6350, 50, 0);
static const struct snd_kcontrol_new dac33_snd_controls[] = {
SOC_DOUBLE_R_TLV("DAC Digital Playback Volume",
DAC33_LDAC_DIG_VOL_CTRL, DAC33_RDAC_DIG_VOL_CTRL,
0, 0x7f, 1, dac_digivol_tlv),
SOC_DOUBLE_R("DAC Digital Playback Switch",
DAC33_LDAC_DIG_VOL_CTRL, DAC33_RDAC_DIG_VOL_CTRL, 7, 1, 1),
SOC_DOUBLE_R("Line to Line Out Volume",
DAC33_LINEL_TO_LLO_VOL, DAC33_LINER_TO_RLO_VOL, 0, 127, 1),
};
static const struct snd_kcontrol_new dac33_nsample_snd_controls[] = {
SOC_SINGLE_EXT("nSample", 0, 0, 5900, 0,
dac33_get_nsample, dac33_set_nsample),
SOC_SINGLE_EXT("nSample Switch", 0, 0, 1, 0,
dac33_get_nsample_switch, dac33_set_nsample_switch),
};
/* Analog bypass */
static const struct snd_kcontrol_new dac33_dapm_abypassl_control =
SOC_DAPM_SINGLE("Switch", DAC33_LINEL_TO_LLO_VOL, 7, 1, 1);
static const struct snd_kcontrol_new dac33_dapm_abypassr_control =
SOC_DAPM_SINGLE("Switch", DAC33_LINER_TO_RLO_VOL, 7, 1, 1);
static const struct snd_soc_dapm_widget dac33_dapm_widgets[] = {
SND_SOC_DAPM_OUTPUT("LEFT_LO"),
SND_SOC_DAPM_OUTPUT("RIGHT_LO"),
SND_SOC_DAPM_INPUT("LINEL"),
SND_SOC_DAPM_INPUT("LINER"),
SND_SOC_DAPM_DAC("DACL", "Left Playback", DAC33_LDAC_PWR_CTRL, 2, 0),
SND_SOC_DAPM_DAC("DACR", "Right Playback", DAC33_RDAC_PWR_CTRL, 2, 0),
/* Analog bypass */
SND_SOC_DAPM_SWITCH("Analog Left Bypass", SND_SOC_NOPM, 0, 0,
&dac33_dapm_abypassl_control),
SND_SOC_DAPM_SWITCH("Analog Right Bypass", SND_SOC_NOPM, 0, 0,
&dac33_dapm_abypassr_control),
SND_SOC_DAPM_REG(snd_soc_dapm_mixer, "Output Left Amp Power",
DAC33_OUT_AMP_PWR_CTRL, 6, 3, 3, 0),
SND_SOC_DAPM_REG(snd_soc_dapm_mixer, "Output Right Amp Power",
DAC33_OUT_AMP_PWR_CTRL, 4, 3, 3, 0),
};
static const struct snd_soc_dapm_route audio_map[] = {
/* Analog bypass */
{"Analog Left Bypass", "Switch", "LINEL"},
{"Analog Right Bypass", "Switch", "LINER"},
{"Output Left Amp Power", NULL, "DACL"},
{"Output Right Amp Power", NULL, "DACR"},
{"Output Left Amp Power", NULL, "Analog Left Bypass"},
{"Output Right Amp Power", NULL, "Analog Right Bypass"},
/* output */
{"LEFT_LO", NULL, "Output Left Amp Power"},
{"RIGHT_LO", NULL, "Output Right Amp Power"},
};
static int dac33_add_widgets(struct snd_soc_codec *codec)
{
snd_soc_dapm_new_controls(codec, dac33_dapm_widgets,
ARRAY_SIZE(dac33_dapm_widgets));
/* set up audio path interconnects */
snd_soc_dapm_add_routes(codec, audio_map, ARRAY_SIZE(audio_map));
snd_soc_dapm_new_widgets(codec);
return 0;
}
static int dac33_set_bias_level(struct snd_soc_codec *codec,
enum snd_soc_bias_level level)
{
switch (level) {
case SND_SOC_BIAS_ON:
dac33_soft_power(codec, 1);
break;
case SND_SOC_BIAS_PREPARE:
break;
case SND_SOC_BIAS_STANDBY:
if (codec->bias_level == SND_SOC_BIAS_OFF)
dac33_hard_power(codec, 1);
dac33_soft_power(codec, 0);
break;
case SND_SOC_BIAS_OFF:
dac33_hard_power(codec, 0);
break;
}
codec->bias_level = level;
return 0;
}
static void dac33_work(struct work_struct *work)
{
struct snd_soc_codec *codec;
struct tlv320dac33_priv *dac33;
u8 reg;
dac33 = container_of(work, struct tlv320dac33_priv, work);
codec = &dac33->codec;
mutex_lock(&dac33->mutex);
switch (dac33->state) {
case DAC33_PREFILL:
dac33->state = DAC33_PLAYBACK;
dac33_write16(codec, DAC33_NSAMPLE_MSB,
DAC33_THRREG(dac33->nsample));
dac33_write16(codec, DAC33_PREFILL_MSB,
DAC33_THRREG(dac33->alarm_threshold));
break;
case DAC33_PLAYBACK:
dac33_write16(codec, DAC33_NSAMPLE_MSB,
DAC33_THRREG(dac33->nsample));
break;
case DAC33_IDLE:
break;
case DAC33_FLUSH:
dac33->state = DAC33_IDLE;
/* Mask all interrupts from dac33 */
dac33_write(codec, DAC33_FIFO_IRQ_MASK, 0);
/* flush fifo */
reg = dac33_read_reg_cache(codec, DAC33_FIFO_CTRL_A);
reg |= DAC33_FIFOFLUSH;
dac33_write(codec, DAC33_FIFO_CTRL_A, reg);
break;
}
mutex_unlock(&dac33->mutex);
}
static irqreturn_t dac33_interrupt_handler(int irq, void *dev)
{
struct snd_soc_codec *codec = dev;
struct tlv320dac33_priv *dac33 = codec->private_data;
queue_work(dac33->dac33_wq, &dac33->work);
return IRQ_HANDLED;
}
static void dac33_shutdown(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct snd_soc_device *socdev = rtd->socdev;
struct snd_soc_codec *codec = socdev->card->codec;
struct tlv320dac33_priv *dac33 = codec->private_data;
unsigned int pwr_ctrl;
/* Stop pending workqueue */
if (dac33->nsample_switch)
cancel_work_sync(&dac33->work);
mutex_lock(&dac33->mutex);
pwr_ctrl = dac33_read_reg_cache(codec, DAC33_PWR_CTRL);
pwr_ctrl &= ~(DAC33_OSCPDNB | DAC33_DACRPDNB | DAC33_DACLPDNB);
dac33_write(codec, DAC33_PWR_CTRL, pwr_ctrl);
mutex_unlock(&dac33->mutex);
}
static void dac33_oscwait(struct snd_soc_codec *codec)
{
int timeout = 20;
u8 reg;
do {
msleep(1);
dac33_read(codec, DAC33_INT_OSC_STATUS, &reg);
} while (((reg & 0x03) != DAC33_OSCSTATUS_NORMAL) && timeout--);
if ((reg & 0x03) != DAC33_OSCSTATUS_NORMAL)
dev_err(codec->dev,
"internal oscillator calibration failed\n");
}
static int dac33_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params,
struct snd_soc_dai *dai)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct snd_soc_device *socdev = rtd->socdev;
struct snd_soc_codec *codec = socdev->card->codec;
/* Check parameters for validity */
switch (params_rate(params)) {
case 44100:
case 48000:
break;
default:
dev_err(codec->dev, "unsupported rate %d\n",
params_rate(params));
return -EINVAL;
}
switch (params_format(params)) {
case SNDRV_PCM_FORMAT_S16_LE:
break;
default:
dev_err(codec->dev, "unsupported format %d\n",
params_format(params));
return -EINVAL;
}
return 0;
}
#define CALC_OSCSET(rate, refclk) ( \
((((rate * 10000) / refclk) * 4096) + 5000) / 10000)
#define CALC_RATIOSET(rate, refclk) ( \
((((refclk * 100000) / rate) * 16384) + 50000) / 100000)
/*
* tlv320dac33 is strict on the sequence of the register writes, if the register
* writes happens in different order, than dac33 might end up in unknown state.
* Use the known, working sequence of register writes to initialize the dac33.
*/
static int dac33_prepare_chip(struct snd_pcm_substream *substream)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct snd_soc_device *socdev = rtd->socdev;
struct snd_soc_codec *codec = socdev->card->codec;
struct tlv320dac33_priv *dac33 = codec->private_data;
unsigned int oscset, ratioset, pwr_ctrl, reg_tmp;
u8 aictrl_a, fifoctrl_a;
switch (substream->runtime->rate) {
case 44100:
case 48000:
oscset = CALC_OSCSET(substream->runtime->rate, dac33->refclk);
ratioset = CALC_RATIOSET(substream->runtime->rate,
dac33->refclk);
break;
default:
dev_err(codec->dev, "unsupported rate %d\n",
substream->runtime->rate);
return -EINVAL;
}
aictrl_a = dac33_read_reg_cache(codec, DAC33_SER_AUDIOIF_CTRL_A);
aictrl_a &= ~(DAC33_NCYCL_MASK | DAC33_WLEN_MASK);
fifoctrl_a = dac33_read_reg_cache(codec, DAC33_FIFO_CTRL_A);
fifoctrl_a &= ~DAC33_WIDTH;
switch (substream->runtime->format) {
case SNDRV_PCM_FORMAT_S16_LE:
aictrl_a |= (DAC33_NCYCL_16 | DAC33_WLEN_16);
fifoctrl_a |= DAC33_WIDTH;
break;
default:
dev_err(codec->dev, "unsupported format %d\n",
substream->runtime->format);
return -EINVAL;
}
mutex_lock(&dac33->mutex);
dac33_soft_power(codec, 1);
reg_tmp = dac33_read_reg_cache(codec, DAC33_INT_OSC_CTRL);
dac33_write(codec, DAC33_INT_OSC_CTRL, reg_tmp);
/* Write registers 0x08 and 0x09 (MSB, LSB) */
dac33_write16(codec, DAC33_INT_OSC_FREQ_RAT_A, oscset);
/* calib time: 128 is a nice number ;) */
dac33_write(codec, DAC33_CALIB_TIME, 128);
/* adjustment treshold & step */
dac33_write(codec, DAC33_INT_OSC_CTRL_B, DAC33_ADJTHRSHLD(2) |
DAC33_ADJSTEP(1));
/* div=4 / gain=1 / div */
dac33_write(codec, DAC33_INT_OSC_CTRL_C, DAC33_REFDIV(4));
pwr_ctrl = dac33_read_reg_cache(codec, DAC33_PWR_CTRL);
pwr_ctrl |= DAC33_OSCPDNB | DAC33_DACRPDNB | DAC33_DACLPDNB;
dac33_write(codec, DAC33_PWR_CTRL, pwr_ctrl);
dac33_oscwait(codec);
if (dac33->nsample_switch) {
/* 50-51 : ASRC Control registers */
dac33_write(codec, DAC33_ASRC_CTRL_A, (1 << 4)); /* div=2 */
dac33_write(codec, DAC33_ASRC_CTRL_B, 1); /* ??? */
/* Write registers 0x34 and 0x35 (MSB, LSB) */
dac33_write16(codec, DAC33_SRC_REF_CLK_RATIO_A, ratioset);
/* Set interrupts to high active */
dac33_write(codec, DAC33_INTP_CTRL_A, DAC33_INTPM_AHIGH);
dac33_write(codec, DAC33_FIFO_IRQ_MODE_B,
DAC33_ATM(DAC33_FIFO_IRQ_MODE_LEVEL));
dac33_write(codec, DAC33_FIFO_IRQ_MASK, DAC33_MAT);
} else {
/* 50-51 : ASRC Control registers */
dac33_write(codec, DAC33_ASRC_CTRL_A, DAC33_SRCBYP);
dac33_write(codec, DAC33_ASRC_CTRL_B, 0); /* ??? */
}
if (dac33->nsample_switch)
fifoctrl_a &= ~DAC33_FBYPAS;
else
fifoctrl_a |= DAC33_FBYPAS;
dac33_write(codec, DAC33_FIFO_CTRL_A, fifoctrl_a);
dac33_write(codec, DAC33_SER_AUDIOIF_CTRL_A, aictrl_a);
reg_tmp = dac33_read_reg_cache(codec, DAC33_SER_AUDIOIF_CTRL_B);
if (dac33->nsample_switch)
reg_tmp &= ~DAC33_BCLKON;
else
reg_tmp |= DAC33_BCLKON;
dac33_write(codec, DAC33_SER_AUDIOIF_CTRL_B, reg_tmp);
if (dac33->nsample_switch) {
/* 20: BCLK divide ratio */
dac33_write(codec, DAC33_SER_AUDIOIF_CTRL_C, 3);
dac33_write16(codec, DAC33_ATHR_MSB,
DAC33_THRREG(dac33->alarm_threshold));
} else {
dac33_write(codec, DAC33_SER_AUDIOIF_CTRL_C, 32);
}
mutex_unlock(&dac33->mutex);
return 0;
}
static void dac33_calculate_times(struct snd_pcm_substream *substream)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct snd_soc_device *socdev = rtd->socdev;
struct snd_soc_codec *codec = socdev->card->codec;
struct tlv320dac33_priv *dac33 = codec->private_data;
unsigned int nsample_limit;
/* Number of samples (16bit, stereo) in one period */
dac33->nsample_min = snd_pcm_lib_period_bytes(substream) / 4;
/* Number of samples (16bit, stereo) in ALSA buffer */
dac33->nsample_max = snd_pcm_lib_buffer_bytes(substream) / 4;
/* Subtract one period from the total */
dac33->nsample_max -= dac33->nsample_min;
/* Number of samples for LATENCY_TIME_MS / 2 */
dac33->alarm_threshold = substream->runtime->rate /
(1000 / (LATENCY_TIME_MS / 2));
/* Find and fix up the lowest nsmaple limit */
nsample_limit = substream->runtime->rate / (1000 / LATENCY_TIME_MS);
if (dac33->nsample_min < nsample_limit)
dac33->nsample_min = nsample_limit;
if (dac33->nsample < dac33->nsample_min)
dac33->nsample = dac33->nsample_min;
/*
* Find and fix up the highest nsmaple limit
* In order to not overflow the DAC33 buffer substract the
* alarm_threshold value from the size of the DAC33 buffer
*/
nsample_limit = DAC33_BUFFER_SIZE_SAMPLES - dac33->alarm_threshold;
if (dac33->nsample_max > nsample_limit)
dac33->nsample_max = nsample_limit;
if (dac33->nsample > dac33->nsample_max)
dac33->nsample = dac33->nsample_max;
}
static int dac33_pcm_prepare(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai)
{
dac33_calculate_times(substream);
dac33_prepare_chip(substream);
return 0;
}
static int dac33_pcm_trigger(struct snd_pcm_substream *substream, int cmd,
struct snd_soc_dai *dai)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct snd_soc_device *socdev = rtd->socdev;
struct snd_soc_codec *codec = socdev->card->codec;
struct tlv320dac33_priv *dac33 = codec->private_data;
int ret = 0;
switch (cmd) {
case SNDRV_PCM_TRIGGER_START:
case SNDRV_PCM_TRIGGER_RESUME:
case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
if (dac33->nsample_switch) {
dac33->state = DAC33_PREFILL;
queue_work(dac33->dac33_wq, &dac33->work);
}
break;
case SNDRV_PCM_TRIGGER_STOP:
case SNDRV_PCM_TRIGGER_SUSPEND:
case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
if (dac33->nsample_switch) {
dac33->state = DAC33_FLUSH;
queue_work(dac33->dac33_wq, &dac33->work);
}
break;
default:
ret = -EINVAL;
}
return ret;
}
static int dac33_set_dai_sysclk(struct snd_soc_dai *codec_dai,
int clk_id, unsigned int freq, int dir)
{
struct snd_soc_codec *codec = codec_dai->codec;
struct tlv320dac33_priv *dac33 = codec->private_data;
u8 ioc_reg, asrcb_reg;
ioc_reg = dac33_read_reg_cache(codec, DAC33_INT_OSC_CTRL);
asrcb_reg = dac33_read_reg_cache(codec, DAC33_ASRC_CTRL_B);
switch (clk_id) {
case TLV320DAC33_MCLK:
ioc_reg |= DAC33_REFSEL;
asrcb_reg |= DAC33_SRCREFSEL;
break;
case TLV320DAC33_SLEEPCLK:
ioc_reg &= ~DAC33_REFSEL;
asrcb_reg &= ~DAC33_SRCREFSEL;
break;
default:
dev_err(codec->dev, "Invalid clock ID (%d)\n", clk_id);
break;
}
dac33->refclk = freq;
dac33_write_reg_cache(codec, DAC33_INT_OSC_CTRL, ioc_reg);
dac33_write_reg_cache(codec, DAC33_ASRC_CTRL_B, asrcb_reg);
return 0;
}
static int dac33_set_dai_fmt(struct snd_soc_dai *codec_dai,
unsigned int fmt)
{
struct snd_soc_codec *codec = codec_dai->codec;
u8 aictrl_a, aictrl_b;
aictrl_a = dac33_read_reg_cache(codec, DAC33_SER_AUDIOIF_CTRL_A);
aictrl_b = dac33_read_reg_cache(codec, DAC33_SER_AUDIOIF_CTRL_B);
/* set master/slave audio interface */
switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
case SND_SOC_DAIFMT_CBM_CFM:
/* Codec Master */
aictrl_a |= (DAC33_MSBCLK | DAC33_MSWCLK);
break;
case SND_SOC_DAIFMT_CBS_CFS:
/* Codec Slave */
aictrl_a &= ~(DAC33_MSBCLK | DAC33_MSWCLK);
break;
default:
return -EINVAL;
}
aictrl_a &= ~DAC33_AFMT_MASK;
switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
case SND_SOC_DAIFMT_I2S:
aictrl_a |= DAC33_AFMT_I2S;
break;
case SND_SOC_DAIFMT_DSP_A:
aictrl_a |= DAC33_AFMT_DSP;
aictrl_b &= ~DAC33_DATA_DELAY_MASK;
aictrl_b |= DAC33_DATA_DELAY(1); /* 1 bit delay */
break;
case SND_SOC_DAIFMT_DSP_B:
aictrl_a |= DAC33_AFMT_DSP;
aictrl_b &= ~DAC33_DATA_DELAY_MASK; /* No delay */
break;
case SND_SOC_DAIFMT_RIGHT_J:
aictrl_a |= DAC33_AFMT_RIGHT_J;
break;
case SND_SOC_DAIFMT_LEFT_J:
aictrl_a |= DAC33_AFMT_LEFT_J;
break;
default:
dev_err(codec->dev, "Unsupported format (%u)\n",
fmt & SND_SOC_DAIFMT_FORMAT_MASK);
return -EINVAL;
}
dac33_write_reg_cache(codec, DAC33_SER_AUDIOIF_CTRL_A, aictrl_a);
dac33_write_reg_cache(codec, DAC33_SER_AUDIOIF_CTRL_B, aictrl_b);
return 0;
}
static void dac33_init_chip(struct snd_soc_codec *codec)
{
/* 44-46: DAC Control Registers */
/* A : DAC sample rate Fsref/1.5 */
dac33_write(codec, DAC33_DAC_CTRL_A, DAC33_DACRATE(1));
/* B : DAC src=normal, not muted */
dac33_write(codec, DAC33_DAC_CTRL_B, DAC33_DACSRCR_RIGHT |
DAC33_DACSRCL_LEFT);
/* C : (defaults) */
dac33_write(codec, DAC33_DAC_CTRL_C, 0x00);
/* 64-65 : L&R DAC power control
Line In -> OUT 1V/V Gain, DAC -> OUT 4V/V Gain*/
dac33_write(codec, DAC33_LDAC_PWR_CTRL, DAC33_LROUT_GAIN(2));
dac33_write(codec, DAC33_RDAC_PWR_CTRL, DAC33_LROUT_GAIN(2));
/* 73 : volume soft stepping control,
clock source = internal osc (?) */
dac33_write(codec, DAC33_ANA_VOL_SOFT_STEP_CTRL, DAC33_VOLCLKEN);
/* 66 : LOP/LOM Modes */
dac33_write(codec, DAC33_OUT_AMP_CM_CTRL, 0xff);
/* 68 : LOM inverted from LOP */
dac33_write(codec, DAC33_OUT_AMP_CTRL, (3<<2));
dac33_write(codec, DAC33_PWR_CTRL, DAC33_PDNALLB);
}
static int dac33_soc_probe(struct platform_device *pdev)
{
struct snd_soc_device *socdev = platform_get_drvdata(pdev);
struct snd_soc_codec *codec;
struct tlv320dac33_priv *dac33;
int ret = 0;
BUG_ON(!tlv320dac33_codec);
codec = tlv320dac33_codec;
socdev->card->codec = codec;
dac33 = codec->private_data;
/* Power up the codec */
dac33_hard_power(codec, 1);
/* Set default configuration */
dac33_init_chip(codec);
/* register pcms */
ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1);
if (ret < 0) {
dev_err(codec->dev, "failed to create pcms\n");
goto pcm_err;
}
snd_soc_add_controls(codec, dac33_snd_controls,
ARRAY_SIZE(dac33_snd_controls));
/* Only add the nSample controls, if we have valid IRQ number */
if (dac33->irq >= 0)
snd_soc_add_controls(codec, dac33_nsample_snd_controls,
ARRAY_SIZE(dac33_nsample_snd_controls));
dac33_add_widgets(codec);
/* power on device */
dac33_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
ret = snd_soc_init_card(socdev);
if (ret < 0) {
dev_err(codec->dev, "failed to register card\n");
goto card_err;
}
return 0;
card_err:
snd_soc_free_pcms(socdev);
snd_soc_dapm_free(socdev);
pcm_err:
dac33_hard_power(codec, 0);
return ret;
}
static int dac33_soc_remove(struct platform_device *pdev)
{
struct snd_soc_device *socdev = platform_get_drvdata(pdev);
struct snd_soc_codec *codec = socdev->card->codec;
dac33_set_bias_level(codec, SND_SOC_BIAS_OFF);
snd_soc_free_pcms(socdev);
snd_soc_dapm_free(socdev);
return 0;
}
static int dac33_soc_suspend(struct platform_device *pdev, pm_message_t state)
{
struct snd_soc_device *socdev = platform_get_drvdata(pdev);
struct snd_soc_codec *codec = socdev->card->codec;
dac33_set_bias_level(codec, SND_SOC_BIAS_OFF);
return 0;
}
static int dac33_soc_resume(struct platform_device *pdev)
{
struct snd_soc_device *socdev = platform_get_drvdata(pdev);
struct snd_soc_codec *codec = socdev->card->codec;
dac33_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
dac33_set_bias_level(codec, codec->suspend_bias_level);
return 0;
}
struct snd_soc_codec_device soc_codec_dev_tlv320dac33 = {
.probe = dac33_soc_probe,
.remove = dac33_soc_remove,
.suspend = dac33_soc_suspend,
.resume = dac33_soc_resume,
};
EXPORT_SYMBOL_GPL(soc_codec_dev_tlv320dac33);
#define DAC33_RATES (SNDRV_PCM_RATE_44100 | \
SNDRV_PCM_RATE_48000)
#define DAC33_FORMATS SNDRV_PCM_FMTBIT_S16_LE
static struct snd_soc_dai_ops dac33_dai_ops = {
.shutdown = dac33_shutdown,
.hw_params = dac33_hw_params,
.prepare = dac33_pcm_prepare,
.trigger = dac33_pcm_trigger,
.set_sysclk = dac33_set_dai_sysclk,
.set_fmt = dac33_set_dai_fmt,
};
struct snd_soc_dai dac33_dai = {
.name = "tlv320dac33",
.playback = {
.stream_name = "Playback",
.channels_min = 2,
.channels_max = 2,
.rates = DAC33_RATES,
.formats = DAC33_FORMATS,},
.ops = &dac33_dai_ops,
};
EXPORT_SYMBOL_GPL(dac33_dai);
static int dac33_i2c_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
struct tlv320dac33_platform_data *pdata;
struct tlv320dac33_priv *dac33;
struct snd_soc_codec *codec;
int ret = 0;
if (client->dev.platform_data == NULL) {
dev_err(&client->dev, "Platform data not set\n");
return -ENODEV;
}
pdata = client->dev.platform_data;
dac33 = kzalloc(sizeof(struct tlv320dac33_priv), GFP_KERNEL);
if (dac33 == NULL)
return -ENOMEM;
codec = &dac33->codec;
codec->private_data = dac33;
codec->control_data = client;
mutex_init(&codec->mutex);
mutex_init(&dac33->mutex);
INIT_LIST_HEAD(&codec->dapm_widgets);
INIT_LIST_HEAD(&codec->dapm_paths);
codec->name = "tlv320dac33";
codec->owner = THIS_MODULE;
codec->read = dac33_read_reg_cache;
codec->write = dac33_write_locked;
codec->hw_write = (hw_write_t) i2c_master_send;
codec->bias_level = SND_SOC_BIAS_OFF;
codec->set_bias_level = dac33_set_bias_level;
codec->dai = &dac33_dai;
codec->num_dai = 1;
codec->reg_cache_size = ARRAY_SIZE(dac33_reg);
codec->reg_cache = kmemdup(dac33_reg, ARRAY_SIZE(dac33_reg),
GFP_KERNEL);
if (codec->reg_cache == NULL) {
ret = -ENOMEM;
goto error_reg;
}
i2c_set_clientdata(client, dac33);
dac33->power_gpio = pdata->power_gpio;
dac33->irq = client->irq;
dac33->nsample = NSAMPLE_MAX;
/* Disable FIFO use by default */
dac33->nsample_switch = 0;
tlv320dac33_codec = codec;
codec->dev = &client->dev;
dac33_dai.dev = codec->dev;
/* Check if the reset GPIO number is valid and request it */
if (dac33->power_gpio >= 0) {
ret = gpio_request(dac33->power_gpio, "tlv320dac33 reset");
if (ret < 0) {
dev_err(codec->dev,
"Failed to request reset GPIO (%d)\n",
dac33->power_gpio);
snd_soc_unregister_dai(&dac33_dai);
snd_soc_unregister_codec(codec);
goto error_gpio;
}
gpio_direction_output(dac33->power_gpio, 0);
} else {
dac33->chip_power = 1;
}
/* Check if the IRQ number is valid and request it */
if (dac33->irq >= 0) {
ret = request_irq(dac33->irq, dac33_interrupt_handler,
IRQF_TRIGGER_RISING | IRQF_DISABLED,
codec->name, codec);
if (ret < 0) {
dev_err(codec->dev, "Could not request IRQ%d (%d)\n",
dac33->irq, ret);
dac33->irq = -1;
}
if (dac33->irq != -1) {
/* Setup work queue */
dac33->dac33_wq = create_rt_workqueue("tlv320dac33");
if (dac33->dac33_wq == NULL) {
free_irq(dac33->irq, &dac33->codec);
ret = -ENOMEM;
goto error_wq;
}
INIT_WORK(&dac33->work, dac33_work);
}
}
ret = snd_soc_register_codec(codec);
if (ret != 0) {
dev_err(codec->dev, "Failed to register codec: %d\n", ret);
goto error_codec;
}
ret = snd_soc_register_dai(&dac33_dai);
if (ret != 0) {
dev_err(codec->dev, "Failed to register DAI: %d\n", ret);
snd_soc_unregister_codec(codec);
goto error_codec;
}
/* Shut down the codec for now */
dac33_hard_power(codec, 0);
return ret;
error_codec:
if (dac33->irq >= 0) {
free_irq(dac33->irq, &dac33->codec);
destroy_workqueue(dac33->dac33_wq);
}
error_wq:
if (dac33->power_gpio >= 0)
gpio_free(dac33->power_gpio);
error_gpio:
kfree(codec->reg_cache);
error_reg:
tlv320dac33_codec = NULL;
kfree(dac33);
return ret;
}
static int dac33_i2c_remove(struct i2c_client *client)
{
struct tlv320dac33_priv *dac33;
dac33 = i2c_get_clientdata(client);
dac33_hard_power(&dac33->codec, 0);
if (dac33->power_gpio >= 0)
gpio_free(dac33->power_gpio);
if (dac33->irq >= 0)
free_irq(dac33->irq, &dac33->codec);
destroy_workqueue(dac33->dac33_wq);
snd_soc_unregister_dai(&dac33_dai);
snd_soc_unregister_codec(&dac33->codec);
kfree(dac33->codec.reg_cache);
kfree(dac33);
tlv320dac33_codec = NULL;
return 0;
}
static const struct i2c_device_id tlv320dac33_i2c_id[] = {
{
.name = "tlv320dac33",
.driver_data = 0,
},
{ },
};
static struct i2c_driver tlv320dac33_i2c_driver = {
.driver = {
.name = "tlv320dac33",
.owner = THIS_MODULE,
},
.probe = dac33_i2c_probe,
.remove = __devexit_p(dac33_i2c_remove),
.id_table = tlv320dac33_i2c_id,
};
static int __init dac33_module_init(void)
{
int r;
r = i2c_add_driver(&tlv320dac33_i2c_driver);
if (r < 0) {
printk(KERN_ERR "DAC33: driver registration failed\n");
return r;
}
return 0;
}
module_init(dac33_module_init);
static void __exit dac33_module_exit(void)
{
i2c_del_driver(&tlv320dac33_i2c_driver);
}
module_exit(dac33_module_exit);
MODULE_DESCRIPTION("ASoC TLV320DAC33 codec driver");
MODULE_AUTHOR("Peter Ujfalusi <peter.ujfalusi@nokia.com>");
MODULE_LICENSE("GPL");
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