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linux-sg2042/sound/soc/mediatek/mt8173/mt8173-afe-pcm.c

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/*
* Mediatek 8173 ALSA SoC AFE platform driver
*
* Copyright (c) 2015 MediaTek Inc.
* Author: Koro Chen <koro.chen@mediatek.com>
* Sascha Hauer <s.hauer@pengutronix.de>
* Hidalgo Huang <hidalgo.huang@mediatek.com>
* Ir Lian <ir.lian@mediatek.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 and
* only 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.
*/
#include <linux/delay.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_address.h>
#include <linux/dma-mapping.h>
#include <linux/pm_runtime.h>
#include <sound/soc.h>
#include "mt8173-afe-common.h"
#include "../common/mtk-base-afe.h"
#include "../common/mtk-afe-platform-driver.h"
#include "../common/mtk-afe-fe-dai.h"
/*****************************************************************************
* R E G I S T E R D E F I N I T I O N
*****************************************************************************/
#define AUDIO_TOP_CON0 0x0000
#define AUDIO_TOP_CON1 0x0004
#define AFE_DAC_CON0 0x0010
#define AFE_DAC_CON1 0x0014
#define AFE_I2S_CON1 0x0034
#define AFE_I2S_CON2 0x0038
#define AFE_CONN_24BIT 0x006c
#define AFE_MEMIF_MSB 0x00cc
#define AFE_CONN1 0x0024
#define AFE_CONN2 0x0028
#define AFE_CONN3 0x002c
#define AFE_CONN7 0x0460
#define AFE_CONN8 0x0464
#define AFE_HDMI_CONN0 0x0390
/* Memory interface */
#define AFE_DL1_BASE 0x0040
#define AFE_DL1_CUR 0x0044
#define AFE_DL1_END 0x0048
#define AFE_DL2_BASE 0x0050
#define AFE_DL2_CUR 0x0054
#define AFE_AWB_BASE 0x0070
#define AFE_AWB_CUR 0x007c
#define AFE_VUL_BASE 0x0080
#define AFE_VUL_CUR 0x008c
#define AFE_VUL_END 0x0088
#define AFE_DAI_BASE 0x0090
#define AFE_DAI_CUR 0x009c
#define AFE_MOD_PCM_BASE 0x0330
#define AFE_MOD_PCM_CUR 0x033c
#define AFE_HDMI_OUT_BASE 0x0374
#define AFE_HDMI_OUT_CUR 0x0378
#define AFE_HDMI_OUT_END 0x037c
#define AFE_ADDA_TOP_CON0 0x0120
#define AFE_ADDA2_TOP_CON0 0x0600
#define AFE_HDMI_OUT_CON0 0x0370
#define AFE_IRQ_MCU_CON 0x03a0
#define AFE_IRQ_STATUS 0x03a4
#define AFE_IRQ_CLR 0x03a8
#define AFE_IRQ_CNT1 0x03ac
#define AFE_IRQ_CNT2 0x03b0
#define AFE_IRQ_MCU_EN 0x03b4
#define AFE_IRQ_CNT5 0x03bc
#define AFE_IRQ_CNT7 0x03dc
#define AFE_TDM_CON1 0x0548
#define AFE_TDM_CON2 0x054c
#define AFE_IRQ_STATUS_BITS 0xff
/* AUDIO_TOP_CON0 (0x0000) */
#define AUD_TCON0_PDN_SPDF (0x1 << 21)
#define AUD_TCON0_PDN_HDMI (0x1 << 20)
#define AUD_TCON0_PDN_24M (0x1 << 9)
#define AUD_TCON0_PDN_22M (0x1 << 8)
#define AUD_TCON0_PDN_AFE (0x1 << 2)
/* AFE_I2S_CON1 (0x0034) */
#define AFE_I2S_CON1_LOW_JITTER_CLK (0x1 << 12)
#define AFE_I2S_CON1_RATE(x) (((x) & 0xf) << 8)
#define AFE_I2S_CON1_FORMAT_I2S (0x1 << 3)
#define AFE_I2S_CON1_EN (0x1 << 0)
/* AFE_I2S_CON2 (0x0038) */
#define AFE_I2S_CON2_LOW_JITTER_CLK (0x1 << 12)
#define AFE_I2S_CON2_RATE(x) (((x) & 0xf) << 8)
#define AFE_I2S_CON2_FORMAT_I2S (0x1 << 3)
#define AFE_I2S_CON2_EN (0x1 << 0)
/* AFE_CONN_24BIT (0x006c) */
#define AFE_CONN_24BIT_O04 (0x1 << 4)
#define AFE_CONN_24BIT_O03 (0x1 << 3)
/* AFE_HDMI_CONN0 (0x0390) */
#define AFE_HDMI_CONN0_O37_I37 (0x7 << 21)
#define AFE_HDMI_CONN0_O36_I36 (0x6 << 18)
#define AFE_HDMI_CONN0_O35_I33 (0x3 << 15)
#define AFE_HDMI_CONN0_O34_I32 (0x2 << 12)
#define AFE_HDMI_CONN0_O33_I35 (0x5 << 9)
#define AFE_HDMI_CONN0_O32_I34 (0x4 << 6)
#define AFE_HDMI_CONN0_O31_I31 (0x1 << 3)
#define AFE_HDMI_CONN0_O30_I30 (0x0 << 0)
/* AFE_TDM_CON1 (0x0548) */
#define AFE_TDM_CON1_LRCK_WIDTH(x) (((x) - 1) << 24)
#define AFE_TDM_CON1_32_BCK_CYCLES (0x2 << 12)
#define AFE_TDM_CON1_WLEN_32BIT (0x2 << 8)
#define AFE_TDM_CON1_MSB_ALIGNED (0x1 << 4)
#define AFE_TDM_CON1_1_BCK_DELAY (0x1 << 3)
#define AFE_TDM_CON1_LRCK_INV (0x1 << 2)
#define AFE_TDM_CON1_BCK_INV (0x1 << 1)
#define AFE_TDM_CON1_EN (0x1 << 0)
enum afe_tdm_ch_start {
AFE_TDM_CH_START_O30_O31 = 0,
AFE_TDM_CH_START_O32_O33,
AFE_TDM_CH_START_O34_O35,
AFE_TDM_CH_START_O36_O37,
AFE_TDM_CH_ZERO,
};
static const unsigned int mt8173_afe_backup_list[] = {
AUDIO_TOP_CON0,
AFE_CONN1,
AFE_CONN2,
AFE_CONN7,
AFE_CONN8,
AFE_DAC_CON1,
AFE_DL1_BASE,
AFE_DL1_END,
AFE_VUL_BASE,
AFE_VUL_END,
AFE_HDMI_OUT_BASE,
AFE_HDMI_OUT_END,
AFE_HDMI_CONN0,
AFE_DAC_CON0,
};
struct mt8173_afe_private {
struct clk *clocks[MT8173_CLK_NUM];
};
static const struct snd_pcm_hardware mt8173_afe_hardware = {
.info = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
SNDRV_PCM_INFO_MMAP_VALID),
.buffer_bytes_max = 256 * 1024,
.period_bytes_min = 512,
.period_bytes_max = 128 * 1024,
.periods_min = 2,
.periods_max = 256,
.fifo_size = 0,
};
struct mt8173_afe_rate {
unsigned int rate;
unsigned int regvalue;
};
static const struct mt8173_afe_rate mt8173_afe_i2s_rates[] = {
{ .rate = 8000, .regvalue = 0 },
{ .rate = 11025, .regvalue = 1 },
{ .rate = 12000, .regvalue = 2 },
{ .rate = 16000, .regvalue = 4 },
{ .rate = 22050, .regvalue = 5 },
{ .rate = 24000, .regvalue = 6 },
{ .rate = 32000, .regvalue = 8 },
{ .rate = 44100, .regvalue = 9 },
{ .rate = 48000, .regvalue = 10 },
{ .rate = 88000, .regvalue = 11 },
{ .rate = 96000, .regvalue = 12 },
{ .rate = 174000, .regvalue = 13 },
{ .rate = 192000, .regvalue = 14 },
};
static int mt8173_afe_i2s_fs(unsigned int sample_rate)
{
int i;
for (i = 0; i < ARRAY_SIZE(mt8173_afe_i2s_rates); i++)
if (mt8173_afe_i2s_rates[i].rate == sample_rate)
return mt8173_afe_i2s_rates[i].regvalue;
return -EINVAL;
}
static int mt8173_afe_set_i2s(struct mtk_base_afe *afe, unsigned int rate)
{
unsigned int val;
int fs = mt8173_afe_i2s_fs(rate);
if (fs < 0)
return -EINVAL;
/* from external ADC */
regmap_update_bits(afe->regmap, AFE_ADDA_TOP_CON0, 0x1, 0x1);
regmap_update_bits(afe->regmap, AFE_ADDA2_TOP_CON0, 0x1, 0x1);
/* set input */
val = AFE_I2S_CON2_LOW_JITTER_CLK |
AFE_I2S_CON2_RATE(fs) |
AFE_I2S_CON2_FORMAT_I2S;
regmap_update_bits(afe->regmap, AFE_I2S_CON2, ~AFE_I2S_CON2_EN, val);
/* set output */
val = AFE_I2S_CON1_LOW_JITTER_CLK |
AFE_I2S_CON1_RATE(fs) |
AFE_I2S_CON1_FORMAT_I2S;
regmap_update_bits(afe->regmap, AFE_I2S_CON1, ~AFE_I2S_CON1_EN, val);
return 0;
}
static void mt8173_afe_set_i2s_enable(struct mtk_base_afe *afe, bool enable)
{
unsigned int val;
regmap_read(afe->regmap, AFE_I2S_CON2, &val);
if (!!(val & AFE_I2S_CON2_EN) == enable)
return;
/* input */
regmap_update_bits(afe->regmap, AFE_I2S_CON2, 0x1, enable);
/* output */
regmap_update_bits(afe->regmap, AFE_I2S_CON1, 0x1, enable);
}
static int mt8173_afe_dais_enable_clks(struct mtk_base_afe *afe,
struct clk *m_ck, struct clk *b_ck)
{
int ret;
if (m_ck) {
ret = clk_prepare_enable(m_ck);
if (ret) {
dev_err(afe->dev, "Failed to enable m_ck\n");
return ret;
}
}
if (b_ck) {
ret = clk_prepare_enable(b_ck);
if (ret) {
dev_err(afe->dev, "Failed to enable b_ck\n");
return ret;
}
}
return 0;
}
static int mt8173_afe_dais_set_clks(struct mtk_base_afe *afe,
struct clk *m_ck, unsigned int mck_rate,
struct clk *b_ck, unsigned int bck_rate)
{
int ret;
if (m_ck) {
ret = clk_set_rate(m_ck, mck_rate);
if (ret) {
dev_err(afe->dev, "Failed to set m_ck rate\n");
return ret;
}
}
if (b_ck) {
ret = clk_set_rate(b_ck, bck_rate);
if (ret) {
dev_err(afe->dev, "Failed to set b_ck rate\n");
return ret;
}
}
return 0;
}
static void mt8173_afe_dais_disable_clks(struct mtk_base_afe *afe,
struct clk *m_ck, struct clk *b_ck)
{
if (m_ck)
clk_disable_unprepare(m_ck);
if (b_ck)
clk_disable_unprepare(b_ck);
}
static int mt8173_afe_i2s_startup(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct mtk_base_afe *afe = snd_soc_platform_get_drvdata(rtd->platform);
if (dai->active)
return 0;
regmap_update_bits(afe->regmap, AUDIO_TOP_CON0,
AUD_TCON0_PDN_22M | AUD_TCON0_PDN_24M, 0);
return 0;
}
static void mt8173_afe_i2s_shutdown(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct mtk_base_afe *afe = snd_soc_platform_get_drvdata(rtd->platform);
if (dai->active)
return;
mt8173_afe_set_i2s_enable(afe, false);
regmap_update_bits(afe->regmap, AUDIO_TOP_CON0,
AUD_TCON0_PDN_22M | AUD_TCON0_PDN_24M,
AUD_TCON0_PDN_22M | AUD_TCON0_PDN_24M);
}
static int mt8173_afe_i2s_prepare(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct snd_pcm_runtime * const runtime = substream->runtime;
struct mtk_base_afe *afe = snd_soc_platform_get_drvdata(rtd->platform);
struct mt8173_afe_private *afe_priv = afe->platform_priv;
int ret;
mt8173_afe_dais_set_clks(afe, afe_priv->clocks[MT8173_CLK_I2S1_M],
runtime->rate * 256, NULL, 0);
mt8173_afe_dais_set_clks(afe, afe_priv->clocks[MT8173_CLK_I2S2_M],
runtime->rate * 256, NULL, 0);
/* config I2S */
ret = mt8173_afe_set_i2s(afe, substream->runtime->rate);
if (ret)
return ret;
mt8173_afe_set_i2s_enable(afe, true);
return 0;
}
static int mt8173_afe_hdmi_startup(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct mtk_base_afe *afe = snd_soc_platform_get_drvdata(rtd->platform);
struct mt8173_afe_private *afe_priv = afe->platform_priv;
if (dai->active)
return 0;
mt8173_afe_dais_enable_clks(afe, afe_priv->clocks[MT8173_CLK_I2S3_M],
afe_priv->clocks[MT8173_CLK_I2S3_B]);
return 0;
}
static void mt8173_afe_hdmi_shutdown(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct mtk_base_afe *afe = snd_soc_platform_get_drvdata(rtd->platform);
struct mt8173_afe_private *afe_priv = afe->platform_priv;
if (dai->active)
return;
mt8173_afe_dais_disable_clks(afe, afe_priv->clocks[MT8173_CLK_I2S3_M],
afe_priv->clocks[MT8173_CLK_I2S3_B]);
}
static int mt8173_afe_hdmi_prepare(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct snd_pcm_runtime * const runtime = substream->runtime;
struct mtk_base_afe *afe = snd_soc_platform_get_drvdata(rtd->platform);
struct mt8173_afe_private *afe_priv = afe->platform_priv;
unsigned int val;
mt8173_afe_dais_set_clks(afe, afe_priv->clocks[MT8173_CLK_I2S3_M],
runtime->rate * 128,
afe_priv->clocks[MT8173_CLK_I2S3_B],
runtime->rate * runtime->channels * 32);
val = AFE_TDM_CON1_BCK_INV |
AFE_TDM_CON1_LRCK_INV |
AFE_TDM_CON1_1_BCK_DELAY |
AFE_TDM_CON1_MSB_ALIGNED | /* I2S mode */
AFE_TDM_CON1_WLEN_32BIT |
AFE_TDM_CON1_32_BCK_CYCLES |
AFE_TDM_CON1_LRCK_WIDTH(32);
regmap_update_bits(afe->regmap, AFE_TDM_CON1, ~AFE_TDM_CON1_EN, val);
/* set tdm2 config */
switch (runtime->channels) {
case 1:
case 2:
val = AFE_TDM_CH_START_O30_O31;
val |= (AFE_TDM_CH_ZERO << 4);
val |= (AFE_TDM_CH_ZERO << 8);
val |= (AFE_TDM_CH_ZERO << 12);
break;
case 3:
case 4:
val = AFE_TDM_CH_START_O30_O31;
val |= (AFE_TDM_CH_START_O32_O33 << 4);
val |= (AFE_TDM_CH_ZERO << 8);
val |= (AFE_TDM_CH_ZERO << 12);
break;
case 5:
case 6:
val = AFE_TDM_CH_START_O30_O31;
val |= (AFE_TDM_CH_START_O32_O33 << 4);
val |= (AFE_TDM_CH_START_O34_O35 << 8);
val |= (AFE_TDM_CH_ZERO << 12);
break;
case 7:
case 8:
val = AFE_TDM_CH_START_O30_O31;
val |= (AFE_TDM_CH_START_O32_O33 << 4);
val |= (AFE_TDM_CH_START_O34_O35 << 8);
val |= (AFE_TDM_CH_START_O36_O37 << 12);
break;
default:
val = 0;
}
regmap_update_bits(afe->regmap, AFE_TDM_CON2, 0x0000ffff, val);
regmap_update_bits(afe->regmap, AFE_HDMI_OUT_CON0,
0x000000f0, runtime->channels << 4);
return 0;
}
static int mt8173_afe_hdmi_trigger(struct snd_pcm_substream *substream, int cmd,
struct snd_soc_dai *dai)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct mtk_base_afe *afe = snd_soc_platform_get_drvdata(rtd->platform);
dev_info(afe->dev, "%s cmd=%d %s\n", __func__, cmd, dai->name);
switch (cmd) {
case SNDRV_PCM_TRIGGER_START:
case SNDRV_PCM_TRIGGER_RESUME:
regmap_update_bits(afe->regmap, AUDIO_TOP_CON0,
AUD_TCON0_PDN_HDMI | AUD_TCON0_PDN_SPDF, 0);
/* set connections: O30~O37: L/R/LS/RS/C/LFE/CH7/CH8 */
regmap_write(afe->regmap, AFE_HDMI_CONN0,
AFE_HDMI_CONN0_O30_I30 |
AFE_HDMI_CONN0_O31_I31 |
AFE_HDMI_CONN0_O32_I34 |
AFE_HDMI_CONN0_O33_I35 |
AFE_HDMI_CONN0_O34_I32 |
AFE_HDMI_CONN0_O35_I33 |
AFE_HDMI_CONN0_O36_I36 |
AFE_HDMI_CONN0_O37_I37);
/* enable Out control */
regmap_update_bits(afe->regmap, AFE_HDMI_OUT_CON0, 0x1, 0x1);
/* enable tdm */
regmap_update_bits(afe->regmap, AFE_TDM_CON1, 0x1, 0x1);
return 0;
case SNDRV_PCM_TRIGGER_STOP:
case SNDRV_PCM_TRIGGER_SUSPEND:
/* disable tdm */
regmap_update_bits(afe->regmap, AFE_TDM_CON1, 0x1, 0);
/* disable Out control */
regmap_update_bits(afe->regmap, AFE_HDMI_OUT_CON0, 0x1, 0);
regmap_update_bits(afe->regmap, AUDIO_TOP_CON0,
AUD_TCON0_PDN_HDMI | AUD_TCON0_PDN_SPDF,
AUD_TCON0_PDN_HDMI | AUD_TCON0_PDN_SPDF);
return 0;
default:
return -EINVAL;
}
}
static int mt8173_memif_fs(struct snd_pcm_substream *substream,
unsigned int rate)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct mtk_base_afe *afe = snd_soc_platform_get_drvdata(rtd->platform);
struct mtk_base_afe_memif *memif = &afe->memif[rtd->cpu_dai->id];
int fs;
if (memif->data->id == MT8173_AFE_MEMIF_DAI ||
memif->data->id == MT8173_AFE_MEMIF_MOD_DAI) {
switch (rate) {
case 8000:
fs = 0;
break;
case 16000:
fs = 1;
break;
case 32000:
fs = 2;
break;
default:
return -EINVAL;
}
} else {
fs = mt8173_afe_i2s_fs(rate);
}
return fs;
}
static int mt8173_irq_fs(struct snd_pcm_substream *substream, unsigned int rate)
{
return mt8173_afe_i2s_fs(rate);
}
/* BE DAIs */
static const struct snd_soc_dai_ops mt8173_afe_i2s_ops = {
.startup = mt8173_afe_i2s_startup,
.shutdown = mt8173_afe_i2s_shutdown,
.prepare = mt8173_afe_i2s_prepare,
};
static const struct snd_soc_dai_ops mt8173_afe_hdmi_ops = {
.startup = mt8173_afe_hdmi_startup,
.shutdown = mt8173_afe_hdmi_shutdown,
.prepare = mt8173_afe_hdmi_prepare,
.trigger = mt8173_afe_hdmi_trigger,
};
static struct snd_soc_dai_driver mt8173_afe_pcm_dais[] = {
/* FE DAIs: memory intefaces to CPU */
{
.name = "DL1", /* downlink 1 */
.id = MT8173_AFE_MEMIF_DL1,
.suspend = mtk_afe_dai_suspend,
.resume = mtk_afe_dai_resume,
.playback = {
.stream_name = "DL1",
.channels_min = 1,
.channels_max = 2,
.rates = SNDRV_PCM_RATE_8000_48000,
.formats = SNDRV_PCM_FMTBIT_S16_LE,
},
.ops = &mtk_afe_fe_ops,
}, {
.name = "VUL", /* voice uplink */
.id = MT8173_AFE_MEMIF_VUL,
.suspend = mtk_afe_dai_suspend,
.resume = mtk_afe_dai_resume,
.capture = {
.stream_name = "VUL",
.channels_min = 1,
.channels_max = 2,
.rates = SNDRV_PCM_RATE_8000_48000,
.formats = SNDRV_PCM_FMTBIT_S16_LE,
},
.ops = &mtk_afe_fe_ops,
}, {
/* BE DAIs */
.name = "I2S",
.id = MT8173_AFE_IO_I2S,
.playback = {
.stream_name = "I2S Playback",
.channels_min = 1,
.channels_max = 2,
.rates = SNDRV_PCM_RATE_8000_48000,
.formats = SNDRV_PCM_FMTBIT_S16_LE,
},
.capture = {
.stream_name = "I2S Capture",
.channels_min = 1,
.channels_max = 2,
.rates = SNDRV_PCM_RATE_8000_48000,
.formats = SNDRV_PCM_FMTBIT_S16_LE,
},
.ops = &mt8173_afe_i2s_ops,
.symmetric_rates = 1,
},
};
static struct snd_soc_dai_driver mt8173_afe_hdmi_dais[] = {
/* FE DAIs */
{
.name = "HDMI",
.id = MT8173_AFE_MEMIF_HDMI,
.suspend = mtk_afe_dai_suspend,
.resume = mtk_afe_dai_resume,
.playback = {
.stream_name = "HDMI",
.channels_min = 2,
.channels_max = 8,
.rates = SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 |
SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 |
SNDRV_PCM_RATE_96000 | SNDRV_PCM_RATE_176400 |
SNDRV_PCM_RATE_192000,
.formats = SNDRV_PCM_FMTBIT_S16_LE,
},
.ops = &mtk_afe_fe_ops,
}, {
/* BE DAIs */
.name = "HDMIO",
.id = MT8173_AFE_IO_HDMI,
.playback = {
.stream_name = "HDMIO Playback",
.channels_min = 2,
.channels_max = 8,
.rates = SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 |
SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 |
SNDRV_PCM_RATE_96000 | SNDRV_PCM_RATE_176400 |
SNDRV_PCM_RATE_192000,
.formats = SNDRV_PCM_FMTBIT_S16_LE,
},
.ops = &mt8173_afe_hdmi_ops,
},
};
static const struct snd_kcontrol_new mt8173_afe_o03_mix[] = {
SOC_DAPM_SINGLE_AUTODISABLE("I05 Switch", AFE_CONN1, 21, 1, 0),
};
static const struct snd_kcontrol_new mt8173_afe_o04_mix[] = {
SOC_DAPM_SINGLE_AUTODISABLE("I06 Switch", AFE_CONN2, 6, 1, 0),
};
static const struct snd_kcontrol_new mt8173_afe_o09_mix[] = {
SOC_DAPM_SINGLE_AUTODISABLE("I03 Switch", AFE_CONN3, 0, 1, 0),
SOC_DAPM_SINGLE_AUTODISABLE("I17 Switch", AFE_CONN7, 30, 1, 0),
};
static const struct snd_kcontrol_new mt8173_afe_o10_mix[] = {
SOC_DAPM_SINGLE_AUTODISABLE("I04 Switch", AFE_CONN3, 3, 1, 0),
SOC_DAPM_SINGLE_AUTODISABLE("I18 Switch", AFE_CONN8, 0, 1, 0),
};
static const struct snd_soc_dapm_widget mt8173_afe_pcm_widgets[] = {
/* inter-connections */
SND_SOC_DAPM_MIXER("I03", SND_SOC_NOPM, 0, 0, NULL, 0),
SND_SOC_DAPM_MIXER("I04", SND_SOC_NOPM, 0, 0, NULL, 0),
SND_SOC_DAPM_MIXER("I05", SND_SOC_NOPM, 0, 0, NULL, 0),
SND_SOC_DAPM_MIXER("I06", SND_SOC_NOPM, 0, 0, NULL, 0),
SND_SOC_DAPM_MIXER("I17", SND_SOC_NOPM, 0, 0, NULL, 0),
SND_SOC_DAPM_MIXER("I18", SND_SOC_NOPM, 0, 0, NULL, 0),
SND_SOC_DAPM_MIXER("O03", SND_SOC_NOPM, 0, 0,
mt8173_afe_o03_mix, ARRAY_SIZE(mt8173_afe_o03_mix)),
SND_SOC_DAPM_MIXER("O04", SND_SOC_NOPM, 0, 0,
mt8173_afe_o04_mix, ARRAY_SIZE(mt8173_afe_o04_mix)),
SND_SOC_DAPM_MIXER("O09", SND_SOC_NOPM, 0, 0,
mt8173_afe_o09_mix, ARRAY_SIZE(mt8173_afe_o09_mix)),
SND_SOC_DAPM_MIXER("O10", SND_SOC_NOPM, 0, 0,
mt8173_afe_o10_mix, ARRAY_SIZE(mt8173_afe_o10_mix)),
};
static const struct snd_soc_dapm_route mt8173_afe_pcm_routes[] = {
{"I05", NULL, "DL1"},
{"I06", NULL, "DL1"},
{"I2S Playback", NULL, "O03"},
{"I2S Playback", NULL, "O04"},
{"VUL", NULL, "O09"},
{"VUL", NULL, "O10"},
{"I03", NULL, "I2S Capture"},
{"I04", NULL, "I2S Capture"},
{"I17", NULL, "I2S Capture"},
{"I18", NULL, "I2S Capture"},
{ "O03", "I05 Switch", "I05" },
{ "O04", "I06 Switch", "I06" },
{ "O09", "I17 Switch", "I17" },
{ "O09", "I03 Switch", "I03" },
{ "O10", "I18 Switch", "I18" },
{ "O10", "I04 Switch", "I04" },
};
static const struct snd_soc_dapm_route mt8173_afe_hdmi_routes[] = {
{"HDMIO Playback", NULL, "HDMI"},
};
static const struct snd_soc_component_driver mt8173_afe_pcm_dai_component = {
.name = "mt8173-afe-pcm-dai",
.dapm_widgets = mt8173_afe_pcm_widgets,
.num_dapm_widgets = ARRAY_SIZE(mt8173_afe_pcm_widgets),
.dapm_routes = mt8173_afe_pcm_routes,
.num_dapm_routes = ARRAY_SIZE(mt8173_afe_pcm_routes),
};
static const struct snd_soc_component_driver mt8173_afe_hdmi_dai_component = {
.name = "mt8173-afe-hdmi-dai",
.dapm_routes = mt8173_afe_hdmi_routes,
.num_dapm_routes = ARRAY_SIZE(mt8173_afe_hdmi_routes),
};
static const char *aud_clks[MT8173_CLK_NUM] = {
[MT8173_CLK_INFRASYS_AUD] = "infra_sys_audio_clk",
[MT8173_CLK_TOP_PDN_AUD] = "top_pdn_audio",
[MT8173_CLK_TOP_PDN_AUD_BUS] = "top_pdn_aud_intbus",
[MT8173_CLK_I2S0_M] = "i2s0_m",
[MT8173_CLK_I2S1_M] = "i2s1_m",
[MT8173_CLK_I2S2_M] = "i2s2_m",
[MT8173_CLK_I2S3_M] = "i2s3_m",
[MT8173_CLK_I2S3_B] = "i2s3_b",
[MT8173_CLK_BCK0] = "bck0",
[MT8173_CLK_BCK1] = "bck1",
};
static const struct mtk_base_memif_data memif_data[MT8173_AFE_MEMIF_NUM] = {
{
.name = "DL1",
.id = MT8173_AFE_MEMIF_DL1,
.reg_ofs_base = AFE_DL1_BASE,
.reg_ofs_cur = AFE_DL1_CUR,
.fs_reg = AFE_DAC_CON1,
.fs_shift = 0,
.fs_maskbit = 0xf,
.mono_reg = AFE_DAC_CON1,
.mono_shift = 21,
.hd_reg = -1,
.hd_shift = -1,
.enable_reg = AFE_DAC_CON0,
.enable_shift = 1,
.msb_reg = AFE_MEMIF_MSB,
.msb_shift = 0,
.agent_disable_reg = -1,
.agent_disable_shift = -1,
}, {
.name = "DL2",
.id = MT8173_AFE_MEMIF_DL2,
.reg_ofs_base = AFE_DL2_BASE,
.reg_ofs_cur = AFE_DL2_CUR,
.fs_reg = AFE_DAC_CON1,
.fs_shift = 4,
.fs_maskbit = 0xf,
.mono_reg = AFE_DAC_CON1,
.mono_shift = 22,
.hd_reg = -1,
.hd_shift = -1,
.enable_reg = AFE_DAC_CON0,
.enable_shift = 2,
.msb_reg = AFE_MEMIF_MSB,
.msb_shift = 1,
.agent_disable_reg = -1,
.agent_disable_shift = -1,
}, {
.name = "VUL",
.id = MT8173_AFE_MEMIF_VUL,
.reg_ofs_base = AFE_VUL_BASE,
.reg_ofs_cur = AFE_VUL_CUR,
.fs_reg = AFE_DAC_CON1,
.fs_shift = 16,
.fs_maskbit = 0xf,
.mono_reg = AFE_DAC_CON1,
.mono_shift = 27,
.hd_reg = -1,
.hd_shift = -1,
.enable_reg = AFE_DAC_CON0,
.enable_shift = 3,
.msb_reg = AFE_MEMIF_MSB,
.msb_shift = 6,
.agent_disable_reg = -1,
.agent_disable_shift = -1,
}, {
.name = "DAI",
.id = MT8173_AFE_MEMIF_DAI,
.reg_ofs_base = AFE_DAI_BASE,
.reg_ofs_cur = AFE_DAI_CUR,
.fs_reg = AFE_DAC_CON0,
.fs_shift = 24,
.fs_maskbit = 0x3,
.mono_reg = -1,
.mono_shift = -1,
.hd_reg = -1,
.hd_shift = -1,
.enable_reg = AFE_DAC_CON0,
.enable_shift = 4,
.msb_reg = AFE_MEMIF_MSB,
.msb_shift = 5,
.agent_disable_reg = -1,
.agent_disable_shift = -1,
}, {
.name = "AWB",
.id = MT8173_AFE_MEMIF_AWB,
.reg_ofs_base = AFE_AWB_BASE,
.reg_ofs_cur = AFE_AWB_CUR,
.fs_reg = AFE_DAC_CON1,
.fs_shift = 12,
.fs_maskbit = 0xf,
.mono_reg = AFE_DAC_CON1,
.mono_shift = 24,
.hd_reg = -1,
.hd_shift = -1,
.enable_reg = AFE_DAC_CON0,
.enable_shift = 6,
.msb_reg = AFE_MEMIF_MSB,
.msb_shift = 3,
.agent_disable_reg = -1,
.agent_disable_shift = -1,
}, {
.name = "MOD_DAI",
.id = MT8173_AFE_MEMIF_MOD_DAI,
.reg_ofs_base = AFE_MOD_PCM_BASE,
.reg_ofs_cur = AFE_MOD_PCM_CUR,
.fs_reg = AFE_DAC_CON1,
.fs_shift = 30,
.fs_maskbit = 0x3,
.mono_reg = AFE_DAC_CON1,
.mono_shift = 30,
.hd_reg = -1,
.hd_shift = -1,
.enable_reg = AFE_DAC_CON0,
.enable_shift = 7,
.msb_reg = AFE_MEMIF_MSB,
.msb_shift = 4,
.agent_disable_reg = -1,
.agent_disable_shift = -1,
}, {
.name = "HDMI",
.id = MT8173_AFE_MEMIF_HDMI,
.reg_ofs_base = AFE_HDMI_OUT_BASE,
.reg_ofs_cur = AFE_HDMI_OUT_CUR,
.fs_reg = -1,
.fs_shift = -1,
.fs_maskbit = -1,
.mono_reg = -1,
.mono_shift = -1,
.hd_reg = -1,
.hd_shift = -1,
.enable_reg = -1,
.enable_shift = -1,
.msb_reg = AFE_MEMIF_MSB,
.msb_shift = 8,
.agent_disable_reg = -1,
.agent_disable_shift = -1,
},
};
static const struct mtk_base_irq_data irq_data[MT8173_AFE_IRQ_NUM] = {
{
.id = MT8173_AFE_IRQ_DL1,
.irq_cnt_reg = AFE_IRQ_CNT1,
.irq_cnt_shift = 0,
.irq_cnt_maskbit = 0x3ffff,
.irq_en_reg = AFE_IRQ_MCU_CON,
.irq_en_shift = 0,
.irq_fs_reg = AFE_IRQ_MCU_CON,
.irq_fs_shift = 4,
.irq_fs_maskbit = 0xf,
.irq_clr_reg = AFE_IRQ_CLR,
.irq_clr_shift = 0,
}, {
.id = MT8173_AFE_IRQ_DL2,
.irq_cnt_reg = AFE_IRQ_CNT1,
.irq_cnt_shift = 20,
.irq_cnt_maskbit = 0x3ffff,
.irq_en_reg = AFE_IRQ_MCU_CON,
.irq_en_shift = 2,
.irq_fs_reg = AFE_IRQ_MCU_CON,
.irq_fs_shift = 16,
.irq_fs_maskbit = 0xf,
.irq_clr_reg = AFE_IRQ_CLR,
.irq_clr_shift = 2,
}, {
.id = MT8173_AFE_IRQ_VUL,
.irq_cnt_reg = AFE_IRQ_CNT2,
.irq_cnt_shift = 0,
.irq_cnt_maskbit = 0x3ffff,
.irq_en_reg = AFE_IRQ_MCU_CON,
.irq_en_shift = 1,
.irq_fs_reg = AFE_IRQ_MCU_CON,
.irq_fs_shift = 8,
.irq_fs_maskbit = 0xf,
.irq_clr_reg = AFE_IRQ_CLR,
.irq_clr_shift = 1,
}, {
.id = MT8173_AFE_IRQ_DAI,
.irq_cnt_reg = AFE_IRQ_CNT2,
.irq_cnt_shift = 20,
.irq_cnt_maskbit = 0x3ffff,
.irq_en_reg = AFE_IRQ_MCU_CON,
.irq_en_shift = 3,
.irq_fs_reg = AFE_IRQ_MCU_CON,
.irq_fs_shift = 20,
.irq_fs_maskbit = 0xf,
.irq_clr_reg = AFE_IRQ_CLR,
.irq_clr_shift = 3,
}, {
.id = MT8173_AFE_IRQ_AWB,
.irq_cnt_reg = AFE_IRQ_CNT7,
.irq_cnt_shift = 0,
.irq_cnt_maskbit = 0x3ffff,
.irq_en_reg = AFE_IRQ_MCU_CON,
.irq_en_shift = 14,
.irq_fs_reg = AFE_IRQ_MCU_CON,
.irq_fs_shift = 24,
.irq_fs_maskbit = 0xf,
.irq_clr_reg = AFE_IRQ_CLR,
.irq_clr_shift = 6,
}, {
.id = MT8173_AFE_IRQ_DAI,
.irq_cnt_reg = AFE_IRQ_CNT2,
.irq_cnt_shift = 20,
.irq_cnt_maskbit = 0x3ffff,
.irq_en_reg = AFE_IRQ_MCU_CON,
.irq_en_shift = 3,
.irq_fs_reg = AFE_IRQ_MCU_CON,
.irq_fs_shift = 20,
.irq_fs_maskbit = 0xf,
.irq_clr_reg = AFE_IRQ_CLR,
.irq_clr_shift = 3,
}, {
.id = MT8173_AFE_IRQ_HDMI,
.irq_cnt_reg = AFE_IRQ_CNT5,
.irq_cnt_shift = 0,
.irq_cnt_maskbit = 0x3ffff,
.irq_en_reg = AFE_IRQ_MCU_CON,
.irq_en_shift = 12,
.irq_fs_reg = -1,
.irq_fs_shift = -1,
.irq_fs_maskbit = -1,
.irq_clr_reg = AFE_IRQ_CLR,
.irq_clr_shift = 4,
},
};
static const struct regmap_config mt8173_afe_regmap_config = {
.reg_bits = 32,
.reg_stride = 4,
.val_bits = 32,
.max_register = AFE_ADDA2_TOP_CON0,
.cache_type = REGCACHE_NONE,
};
static irqreturn_t mt8173_afe_irq_handler(int irq, void *dev_id)
{
struct mtk_base_afe *afe = dev_id;
unsigned int reg_value;
int i, ret;
ret = regmap_read(afe->regmap, AFE_IRQ_STATUS, &reg_value);
if (ret) {
dev_err(afe->dev, "%s irq status err\n", __func__);
reg_value = AFE_IRQ_STATUS_BITS;
goto err_irq;
}
for (i = 0; i < MT8173_AFE_MEMIF_NUM; i++) {
struct mtk_base_afe_memif *memif = &afe->memif[i];
struct mtk_base_afe_irq *irq;
if (memif->irq_usage < 0)
continue;
irq = &afe->irqs[memif->irq_usage];
if (!(reg_value & (1 << irq->irq_data->irq_clr_shift)))
continue;
snd_pcm_period_elapsed(memif->substream);
}
err_irq:
/* clear irq */
regmap_write(afe->regmap, AFE_IRQ_CLR,
reg_value & AFE_IRQ_STATUS_BITS);
return IRQ_HANDLED;
}
static int mt8173_afe_runtime_suspend(struct device *dev)
{
struct mtk_base_afe *afe = dev_get_drvdata(dev);
struct mt8173_afe_private *afe_priv = afe->platform_priv;
/* disable AFE */
regmap_update_bits(afe->regmap, AFE_DAC_CON0, 0x1, 0);
/* disable AFE clk */
regmap_update_bits(afe->regmap, AUDIO_TOP_CON0,
AUD_TCON0_PDN_AFE, AUD_TCON0_PDN_AFE);
clk_disable_unprepare(afe_priv->clocks[MT8173_CLK_I2S1_M]);
clk_disable_unprepare(afe_priv->clocks[MT8173_CLK_I2S2_M]);
clk_disable_unprepare(afe_priv->clocks[MT8173_CLK_BCK0]);
clk_disable_unprepare(afe_priv->clocks[MT8173_CLK_BCK1]);
clk_disable_unprepare(afe_priv->clocks[MT8173_CLK_TOP_PDN_AUD]);
clk_disable_unprepare(afe_priv->clocks[MT8173_CLK_TOP_PDN_AUD_BUS]);
clk_disable_unprepare(afe_priv->clocks[MT8173_CLK_INFRASYS_AUD]);
return 0;
}
static int mt8173_afe_runtime_resume(struct device *dev)
{
struct mtk_base_afe *afe = dev_get_drvdata(dev);
struct mt8173_afe_private *afe_priv = afe->platform_priv;
int ret;
ret = clk_prepare_enable(afe_priv->clocks[MT8173_CLK_INFRASYS_AUD]);
if (ret)
return ret;
ret = clk_prepare_enable(afe_priv->clocks[MT8173_CLK_TOP_PDN_AUD_BUS]);
if (ret)
goto err_infra;
ret = clk_prepare_enable(afe_priv->clocks[MT8173_CLK_TOP_PDN_AUD]);
if (ret)
goto err_top_aud_bus;
ret = clk_prepare_enable(afe_priv->clocks[MT8173_CLK_BCK0]);
if (ret)
goto err_top_aud;
ret = clk_prepare_enable(afe_priv->clocks[MT8173_CLK_BCK1]);
if (ret)
goto err_bck0;
ret = clk_prepare_enable(afe_priv->clocks[MT8173_CLK_I2S1_M]);
if (ret)
goto err_i2s1_m;
ret = clk_prepare_enable(afe_priv->clocks[MT8173_CLK_I2S2_M]);
if (ret)
goto err_i2s2_m;
/* enable AFE clk */
regmap_update_bits(afe->regmap, AUDIO_TOP_CON0, AUD_TCON0_PDN_AFE, 0);
/* set O3/O4 16bits */
regmap_update_bits(afe->regmap, AFE_CONN_24BIT,
AFE_CONN_24BIT_O03 | AFE_CONN_24BIT_O04, 0);
/* unmask all IRQs */
regmap_update_bits(afe->regmap, AFE_IRQ_MCU_EN, 0xff, 0xff);
/* enable AFE */
regmap_update_bits(afe->regmap, AFE_DAC_CON0, 0x1, 0x1);
return 0;
err_i2s1_m:
clk_disable_unprepare(afe_priv->clocks[MT8173_CLK_I2S1_M]);
err_i2s2_m:
clk_disable_unprepare(afe_priv->clocks[MT8173_CLK_I2S2_M]);
err_bck0:
clk_disable_unprepare(afe_priv->clocks[MT8173_CLK_BCK0]);
err_top_aud:
clk_disable_unprepare(afe_priv->clocks[MT8173_CLK_TOP_PDN_AUD]);
err_top_aud_bus:
clk_disable_unprepare(afe_priv->clocks[MT8173_CLK_TOP_PDN_AUD_BUS]);
err_infra:
clk_disable_unprepare(afe_priv->clocks[MT8173_CLK_INFRASYS_AUD]);
return ret;
}
static int mt8173_afe_init_audio_clk(struct mtk_base_afe *afe)
{
size_t i;
struct mt8173_afe_private *afe_priv = afe->platform_priv;
for (i = 0; i < ARRAY_SIZE(aud_clks); i++) {
afe_priv->clocks[i] = devm_clk_get(afe->dev, aud_clks[i]);
if (IS_ERR(afe_priv->clocks[i])) {
dev_err(afe->dev, "%s devm_clk_get %s fail\n",
__func__, aud_clks[i]);
return PTR_ERR(afe_priv->clocks[i]);
}
}
clk_set_rate(afe_priv->clocks[MT8173_CLK_BCK0], 22579200); /* 22M */
clk_set_rate(afe_priv->clocks[MT8173_CLK_BCK1], 24576000); /* 24M */
return 0;
}
static int mt8173_afe_pcm_dev_probe(struct platform_device *pdev)
{
int ret, i;
unsigned int irq_id;
struct mtk_base_afe *afe;
struct mt8173_afe_private *afe_priv;
struct resource *res;
ret = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(33));
if (ret)
return ret;
afe = devm_kzalloc(&pdev->dev, sizeof(*afe), GFP_KERNEL);
if (!afe)
return -ENOMEM;
afe->platform_priv = devm_kzalloc(&pdev->dev, sizeof(*afe_priv),
GFP_KERNEL);
afe_priv = afe->platform_priv;
if (!afe_priv)
return -ENOMEM;
afe->dev = &pdev->dev;
irq_id = platform_get_irq(pdev, 0);
if (!irq_id) {
dev_err(afe->dev, "np %s no irq\n", afe->dev->of_node->name);
return -ENXIO;
}
ret = devm_request_irq(afe->dev, irq_id, mt8173_afe_irq_handler,
0, "Afe_ISR_Handle", (void *)afe);
if (ret) {
dev_err(afe->dev, "could not request_irq\n");
return ret;
}
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
afe->base_addr = devm_ioremap_resource(&pdev->dev, res);
if (IS_ERR(afe->base_addr))
return PTR_ERR(afe->base_addr);
afe->regmap = devm_regmap_init_mmio(&pdev->dev, afe->base_addr,
&mt8173_afe_regmap_config);
if (IS_ERR(afe->regmap))
return PTR_ERR(afe->regmap);
/* initial audio related clock */
ret = mt8173_afe_init_audio_clk(afe);
if (ret) {
dev_err(afe->dev, "mt8173_afe_init_audio_clk fail\n");
return ret;
}
/* memif % irq initialize*/
afe->memif_size = MT8173_AFE_MEMIF_NUM;
afe->memif = devm_kcalloc(afe->dev, afe->memif_size,
sizeof(*afe->memif), GFP_KERNEL);
if (!afe->memif)
return -ENOMEM;
afe->irqs_size = MT8173_AFE_IRQ_NUM;
afe->irqs = devm_kcalloc(afe->dev, afe->irqs_size,
sizeof(*afe->irqs), GFP_KERNEL);
if (!afe->irqs)
return -ENOMEM;
for (i = 0; i < afe->irqs_size; i++) {
afe->memif[i].data = &memif_data[i];
afe->irqs[i].irq_data = &irq_data[i];
afe->irqs[i].irq_occupyed = true;
afe->memif[i].irq_usage = i;
afe->memif[i].const_irq = 1;
}
afe->mtk_afe_hardware = &mt8173_afe_hardware;
afe->memif_fs = mt8173_memif_fs;
afe->irq_fs = mt8173_irq_fs;
platform_set_drvdata(pdev, afe);
pm_runtime_enable(&pdev->dev);
if (!pm_runtime_enabled(&pdev->dev)) {
ret = mt8173_afe_runtime_resume(&pdev->dev);
if (ret)
goto err_pm_disable;
}
afe->reg_back_up_list = mt8173_afe_backup_list;
afe->reg_back_up_list_num = ARRAY_SIZE(mt8173_afe_backup_list);
afe->runtime_resume = mt8173_afe_runtime_resume;
afe->runtime_suspend = mt8173_afe_runtime_suspend;
ret = snd_soc_register_platform(&pdev->dev, &mtk_afe_pcm_platform);
if (ret)
goto err_pm_disable;
ret = snd_soc_register_component(&pdev->dev,
&mt8173_afe_pcm_dai_component,
mt8173_afe_pcm_dais,
ARRAY_SIZE(mt8173_afe_pcm_dais));
if (ret)
goto err_platform;
ret = snd_soc_register_component(&pdev->dev,
&mt8173_afe_hdmi_dai_component,
mt8173_afe_hdmi_dais,
ARRAY_SIZE(mt8173_afe_hdmi_dais));
if (ret)
goto err_comp;
dev_info(&pdev->dev, "MT8173 AFE driver initialized.\n");
return 0;
err_comp:
snd_soc_unregister_component(&pdev->dev);
err_platform:
snd_soc_unregister_platform(&pdev->dev);
err_pm_disable:
pm_runtime_disable(&pdev->dev);
return ret;
}
static int mt8173_afe_pcm_dev_remove(struct platform_device *pdev)
{
pm_runtime_disable(&pdev->dev);
if (!pm_runtime_status_suspended(&pdev->dev))
mt8173_afe_runtime_suspend(&pdev->dev);
snd_soc_unregister_component(&pdev->dev);
snd_soc_unregister_platform(&pdev->dev);
return 0;
}
static const struct of_device_id mt8173_afe_pcm_dt_match[] = {
{ .compatible = "mediatek,mt8173-afe-pcm", },
{ }
};
MODULE_DEVICE_TABLE(of, mt8173_afe_pcm_dt_match);
static const struct dev_pm_ops mt8173_afe_pm_ops = {
SET_RUNTIME_PM_OPS(mt8173_afe_runtime_suspend,
mt8173_afe_runtime_resume, NULL)
};
static struct platform_driver mt8173_afe_pcm_driver = {
.driver = {
.name = "mt8173-afe-pcm",
.of_match_table = mt8173_afe_pcm_dt_match,
.pm = &mt8173_afe_pm_ops,
},
.probe = mt8173_afe_pcm_dev_probe,
.remove = mt8173_afe_pcm_dev_remove,
};
module_platform_driver(mt8173_afe_pcm_driver);
MODULE_DESCRIPTION("Mediatek ALSA SoC AFE platform driver");
MODULE_AUTHOR("Koro Chen <koro.chen@mediatek.com>");
MODULE_LICENSE("GPL v2");
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