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/*
* Analog Devices ADV7511 HDMI transmitter driver
*
* Copyright 2012 Analog Devices Inc.
* Copyright (c) 2016, Linaro Limited
*
* Licensed under the GPL-2.
*/
#include <sound/core.h>
#include <sound/hdmi-codec.h>
#include <sound/pcm.h>
#include <sound/soc.h>
#include <linux/of_graph.h>
#include "adv7511.h"
static void adv7511_calc_cts_n(unsigned int f_tmds, unsigned int fs,
unsigned int *cts, unsigned int *n)
{
switch (fs) {
case 32000:
*n = 4096;
break;
case 44100:
*n = 6272;
break;
case 48000:
*n = 6144;
break;
}
*cts = ((f_tmds * *n) / (128 * fs)) * 1000;
}
static int adv7511_update_cts_n(struct adv7511 *adv7511)
{
unsigned int cts = 0;
unsigned int n = 0;
adv7511_calc_cts_n(adv7511->f_tmds, adv7511->f_audio, &cts, &n);
regmap_write(adv7511->regmap, ADV7511_REG_N0, (n >> 16) & 0xf);
regmap_write(adv7511->regmap, ADV7511_REG_N1, (n >> 8) & 0xff);
regmap_write(adv7511->regmap, ADV7511_REG_N2, n & 0xff);
regmap_write(adv7511->regmap, ADV7511_REG_CTS_MANUAL0,
(cts >> 16) & 0xf);
regmap_write(adv7511->regmap, ADV7511_REG_CTS_MANUAL1,
(cts >> 8) & 0xff);
regmap_write(adv7511->regmap, ADV7511_REG_CTS_MANUAL2,
cts & 0xff);
return 0;
}
int adv7511_hdmi_hw_params(struct device *dev, void *data,
struct hdmi_codec_daifmt *fmt,
struct hdmi_codec_params *hparms)
{
struct adv7511 *adv7511 = dev_get_drvdata(dev);
unsigned int audio_source, i2s_format = 0;
unsigned int invert_clock;
unsigned int rate;
unsigned int len;
switch (hparms->sample_rate) {
case 32000:
rate = ADV7511_SAMPLE_FREQ_32000;
break;
case 44100:
rate = ADV7511_SAMPLE_FREQ_44100;
break;
case 48000:
rate = ADV7511_SAMPLE_FREQ_48000;
break;
case 88200:
rate = ADV7511_SAMPLE_FREQ_88200;
break;
case 96000:
rate = ADV7511_SAMPLE_FREQ_96000;
break;
case 176400:
rate = ADV7511_SAMPLE_FREQ_176400;
break;
case 192000:
rate = ADV7511_SAMPLE_FREQ_192000;
break;
default:
return -EINVAL;
}
switch (hparms->sample_width) {
case 16:
len = ADV7511_I2S_SAMPLE_LEN_16;
break;
case 18:
len = ADV7511_I2S_SAMPLE_LEN_18;
break;
case 20:
len = ADV7511_I2S_SAMPLE_LEN_20;
break;
case 24:
len = ADV7511_I2S_SAMPLE_LEN_24;
break;
default:
return -EINVAL;
}
switch (fmt->fmt) {
case HDMI_I2S:
audio_source = ADV7511_AUDIO_SOURCE_I2S;
i2s_format = ADV7511_I2S_FORMAT_I2S;
break;
case HDMI_RIGHT_J:
audio_source = ADV7511_AUDIO_SOURCE_I2S;
i2s_format = ADV7511_I2S_FORMAT_RIGHT_J;
break;
case HDMI_LEFT_J:
audio_source = ADV7511_AUDIO_SOURCE_I2S;
i2s_format = ADV7511_I2S_FORMAT_LEFT_J;
break;
default:
return -EINVAL;
}
invert_clock = fmt->bit_clk_inv;
regmap_update_bits(adv7511->regmap, ADV7511_REG_AUDIO_SOURCE, 0x70,
audio_source << 4);
regmap_update_bits(adv7511->regmap, ADV7511_REG_AUDIO_CONFIG, BIT(6),
invert_clock << 6);
regmap_update_bits(adv7511->regmap, ADV7511_REG_I2S_CONFIG, 0x03,
i2s_format);
adv7511->audio_source = audio_source;
adv7511->f_audio = hparms->sample_rate;
adv7511_update_cts_n(adv7511);
regmap_update_bits(adv7511->regmap, ADV7511_REG_AUDIO_CFG3,
ADV7511_AUDIO_CFG3_LEN_MASK, len);
regmap_update_bits(adv7511->regmap, ADV7511_REG_I2C_FREQ_ID_CFG,
ADV7511_I2C_FREQ_ID_CFG_RATE_MASK, rate << 4);
regmap_write(adv7511->regmap, 0x73, 0x1);
return 0;
}
static int audio_startup(struct device *dev, void *data)
{
struct adv7511 *adv7511 = dev_get_drvdata(dev);
regmap_update_bits(adv7511->regmap, ADV7511_REG_AUDIO_CONFIG,
BIT(7), 0);
/* hide Audio infoframe updates */
regmap_update_bits(adv7511->regmap, ADV7511_REG_INFOFRAME_UPDATE,
BIT(5), BIT(5));
/* enable N/CTS, enable Audio sample packets */
regmap_update_bits(adv7511->regmap, ADV7511_REG_PACKET_ENABLE1,
BIT(5), BIT(5));
/* enable N/CTS */
regmap_update_bits(adv7511->regmap, ADV7511_REG_PACKET_ENABLE1,
BIT(6), BIT(6));
/* not copyrighted */
regmap_update_bits(adv7511->regmap, ADV7511_REG_AUDIO_CFG1,
BIT(5), BIT(5));
/* enable audio infoframes */
regmap_update_bits(adv7511->regmap, ADV7511_REG_PACKET_ENABLE1,
BIT(3), BIT(3));
/* AV mute disable */
regmap_update_bits(adv7511->regmap, ADV7511_REG_GC(0),
BIT(7) | BIT(6), BIT(7));
/* use Audio infoframe updated info */
regmap_update_bits(adv7511->regmap, ADV7511_REG_GC(1),
BIT(5), 0);
return 0;
}
static void audio_shutdown(struct device *dev, void *data)
{
}
static int adv7511_hdmi_i2s_get_dai_id(struct snd_soc_component *component,
struct device_node *endpoint)
{
struct of_endpoint of_ep;
int ret;
ret = of_graph_parse_endpoint(endpoint, &of_ep);
if (ret < 0)
return ret;
/*
* HDMI sound should be located as reg = <2>
* Then, it is sound port 0
*/
if (of_ep.port == 2)
return 0;
return -EINVAL;
}
static const struct hdmi_codec_ops adv7511_codec_ops = {
.hw_params = adv7511_hdmi_hw_params,
.audio_shutdown = audio_shutdown,
.audio_startup = audio_startup,
.get_dai_id = adv7511_hdmi_i2s_get_dai_id,
};
static const struct hdmi_codec_pdata codec_data = {
.ops = &adv7511_codec_ops,
.max_i2s_channels = 2,
.i2s = 1,
};
int adv7511_audio_init(struct device *dev, struct adv7511 *adv7511)
{
adv7511->audio_pdev = platform_device_register_data(dev,
HDMI_CODEC_DRV_NAME,
PLATFORM_DEVID_AUTO,
&codec_data,
sizeof(codec_data));
return PTR_ERR_OR_ZERO(adv7511->audio_pdev);
}
void adv7511_audio_exit(struct adv7511 *adv7511)
{
if (adv7511->audio_pdev) {
platform_device_unregister(adv7511->audio_pdev);
adv7511->audio_pdev = NULL;
}
}
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