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/*
* mt2701-afe-clock-ctrl.c -- Mediatek 2701 afe clock ctrl
*
* Copyright (c) 2016 MediaTek Inc.
* Author: Garlic Tseng <garlic.tseng@mediatek.com>
* Ryder Lee <ryder.lee@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 "mt2701-afe-common.h"
#include "mt2701-afe-clock-ctrl.h"
static const char *const base_clks[] = {
[MT2701_INFRA_SYS_AUDIO] = "infra_sys_audio_clk",
[MT2701_TOP_AUD_MCLK_SRC0] = "top_audio_mux1_sel",
[MT2701_TOP_AUD_MCLK_SRC1] = "top_audio_mux2_sel",
[MT2701_TOP_AUD_A1SYS] = "top_audio_a1sys_hp",
[MT2701_TOP_AUD_A2SYS] = "top_audio_a2sys_hp",
[MT2701_AUDSYS_AFE] = "audio_afe_pd",
[MT2701_AUDSYS_AFE_CONN] = "audio_afe_conn_pd",
[MT2701_AUDSYS_A1SYS] = "audio_a1sys_pd",
[MT2701_AUDSYS_A2SYS] = "audio_a2sys_pd",
};
int mt2701_init_clock(struct mtk_base_afe *afe)
{
struct mt2701_afe_private *afe_priv = afe->platform_priv;
int i;
for (i = 0; i < MT2701_BASE_CLK_NUM; i++) {
afe_priv->base_ck[i] = devm_clk_get(afe->dev, base_clks[i]);
if (IS_ERR(afe_priv->base_ck[i])) {
dev_err(afe->dev, "failed to get %s\n", base_clks[i]);
return PTR_ERR(afe_priv->base_ck[i]);
}
}
/* Get I2S related clocks */
for (i = 0; i < afe_priv->soc->i2s_num; i++) {
struct mt2701_i2s_path *i2s_path = &afe_priv->i2s_path[i];
struct clk *i2s_ck;
char name[13];
snprintf(name, sizeof(name), "i2s%d_src_sel", i);
i2s_path->sel_ck = devm_clk_get(afe->dev, name);
if (IS_ERR(i2s_path->sel_ck)) {
dev_err(afe->dev, "failed to get %s\n", name);
return PTR_ERR(i2s_path->sel_ck);
}
snprintf(name, sizeof(name), "i2s%d_src_div", i);
i2s_path->div_ck = devm_clk_get(afe->dev, name);
if (IS_ERR(i2s_path->div_ck)) {
dev_err(afe->dev, "failed to get %s\n", name);
return PTR_ERR(i2s_path->div_ck);
}
snprintf(name, sizeof(name), "i2s%d_mclk_en", i);
i2s_path->mclk_ck = devm_clk_get(afe->dev, name);
if (IS_ERR(i2s_path->mclk_ck)) {
dev_err(afe->dev, "failed to get %s\n", name);
return PTR_ERR(i2s_path->mclk_ck);
}
snprintf(name, sizeof(name), "i2so%d_hop_ck", i);
i2s_ck = devm_clk_get(afe->dev, name);
if (IS_ERR(i2s_ck)) {
dev_err(afe->dev, "failed to get %s\n", name);
return PTR_ERR(i2s_ck);
}
i2s_path->hop_ck[SNDRV_PCM_STREAM_PLAYBACK] = i2s_ck;
snprintf(name, sizeof(name), "i2si%d_hop_ck", i);
i2s_ck = devm_clk_get(afe->dev, name);
if (IS_ERR(i2s_ck)) {
dev_err(afe->dev, "failed to get %s\n", name);
return PTR_ERR(i2s_ck);
}
i2s_path->hop_ck[SNDRV_PCM_STREAM_CAPTURE] = i2s_ck;
snprintf(name, sizeof(name), "asrc%d_out_ck", i);
i2s_path->asrco_ck = devm_clk_get(afe->dev, name);
if (IS_ERR(i2s_path->asrco_ck)) {
dev_err(afe->dev, "failed to get %s\n", name);
return PTR_ERR(i2s_path->asrco_ck);
}
}
/* Some platforms may support BT path */
afe_priv->mrgif_ck = devm_clk_get(afe->dev, "audio_mrgif_pd");
if (IS_ERR(afe_priv->mrgif_ck)) {
if (PTR_ERR(afe_priv->mrgif_ck) == -EPROBE_DEFER)
return -EPROBE_DEFER;
afe_priv->mrgif_ck = NULL;
}
return 0;
}
int mt2701_afe_enable_i2s(struct mtk_base_afe *afe,
struct mt2701_i2s_path *i2s_path,
int dir)
{
int ret;
ret = clk_prepare_enable(i2s_path->asrco_ck);
if (ret) {
dev_err(afe->dev, "failed to enable ASRC clock %d\n", ret);
return ret;
}
ret = clk_prepare_enable(i2s_path->hop_ck[dir]);
if (ret) {
dev_err(afe->dev, "failed to enable I2S clock %d\n", ret);
goto err_hop_ck;
}
return 0;
err_hop_ck:
clk_disable_unprepare(i2s_path->asrco_ck);
return ret;
}
void mt2701_afe_disable_i2s(struct mtk_base_afe *afe,
struct mt2701_i2s_path *i2s_path,
int dir)
{
clk_disable_unprepare(i2s_path->hop_ck[dir]);
clk_disable_unprepare(i2s_path->asrco_ck);
}
int mt2701_afe_enable_mclk(struct mtk_base_afe *afe, int id)
{
struct mt2701_afe_private *afe_priv = afe->platform_priv;
struct mt2701_i2s_path *i2s_path = &afe_priv->i2s_path[id];
return clk_prepare_enable(i2s_path->mclk_ck);
}
void mt2701_afe_disable_mclk(struct mtk_base_afe *afe, int id)
{
struct mt2701_afe_private *afe_priv = afe->platform_priv;
struct mt2701_i2s_path *i2s_path = &afe_priv->i2s_path[id];
clk_disable_unprepare(i2s_path->mclk_ck);
}
int mt2701_enable_btmrg_clk(struct mtk_base_afe *afe)
{
struct mt2701_afe_private *afe_priv = afe->platform_priv;
return clk_prepare_enable(afe_priv->mrgif_ck);
}
void mt2701_disable_btmrg_clk(struct mtk_base_afe *afe)
{
struct mt2701_afe_private *afe_priv = afe->platform_priv;
clk_disable_unprepare(afe_priv->mrgif_ck);
}
static int mt2701_afe_enable_audsys(struct mtk_base_afe *afe)
{
struct mt2701_afe_private *afe_priv = afe->platform_priv;
int ret;
/* Enable infra clock gate */
ret = clk_prepare_enable(afe_priv->base_ck[MT2701_INFRA_SYS_AUDIO]);
if (ret)
return ret;
/* Enable top a1sys clock gate */
ret = clk_prepare_enable(afe_priv->base_ck[MT2701_TOP_AUD_A1SYS]);
if (ret)
goto err_a1sys;
/* Enable top a2sys clock gate */
ret = clk_prepare_enable(afe_priv->base_ck[MT2701_TOP_AUD_A2SYS]);
if (ret)
goto err_a2sys;
/* Internal clock gates */
ret = clk_prepare_enable(afe_priv->base_ck[MT2701_AUDSYS_AFE]);
if (ret)
goto err_afe;
ret = clk_prepare_enable(afe_priv->base_ck[MT2701_AUDSYS_A1SYS]);
if (ret)
goto err_audio_a1sys;
ret = clk_prepare_enable(afe_priv->base_ck[MT2701_AUDSYS_A2SYS]);
if (ret)
goto err_audio_a2sys;
ret = clk_prepare_enable(afe_priv->base_ck[MT2701_AUDSYS_AFE_CONN]);
if (ret)
goto err_afe_conn;
return 0;
err_afe_conn:
clk_disable_unprepare(afe_priv->base_ck[MT2701_AUDSYS_A2SYS]);
err_audio_a2sys:
clk_disable_unprepare(afe_priv->base_ck[MT2701_AUDSYS_A1SYS]);
err_audio_a1sys:
clk_disable_unprepare(afe_priv->base_ck[MT2701_AUDSYS_AFE]);
err_afe:
clk_disable_unprepare(afe_priv->base_ck[MT2701_TOP_AUD_A2SYS]);
err_a2sys:
clk_disable_unprepare(afe_priv->base_ck[MT2701_TOP_AUD_A1SYS]);
err_a1sys:
clk_disable_unprepare(afe_priv->base_ck[MT2701_INFRA_SYS_AUDIO]);
return ret;
}
static void mt2701_afe_disable_audsys(struct mtk_base_afe *afe)
{
struct mt2701_afe_private *afe_priv = afe->platform_priv;
clk_disable_unprepare(afe_priv->base_ck[MT2701_AUDSYS_AFE_CONN]);
clk_disable_unprepare(afe_priv->base_ck[MT2701_AUDSYS_A2SYS]);
clk_disable_unprepare(afe_priv->base_ck[MT2701_AUDSYS_A1SYS]);
clk_disable_unprepare(afe_priv->base_ck[MT2701_AUDSYS_AFE]);
clk_disable_unprepare(afe_priv->base_ck[MT2701_TOP_AUD_A1SYS]);
clk_disable_unprepare(afe_priv->base_ck[MT2701_TOP_AUD_A2SYS]);
clk_disable_unprepare(afe_priv->base_ck[MT2701_INFRA_SYS_AUDIO]);
}
int mt2701_afe_enable_clock(struct mtk_base_afe *afe)
{
int ret;
/* Enable audio system */
ret = mt2701_afe_enable_audsys(afe);
if (ret) {
dev_err(afe->dev, "failed to enable audio system %d\n", ret);
return ret;
}
regmap_update_bits(afe->regmap, ASYS_TOP_CON,
ASYS_TOP_CON_ASYS_TIMING_ON,
ASYS_TOP_CON_ASYS_TIMING_ON);
regmap_update_bits(afe->regmap, AFE_DAC_CON0,
AFE_DAC_CON0_AFE_ON,
AFE_DAC_CON0_AFE_ON);
/* Configure ASRC */
regmap_write(afe->regmap, PWR1_ASM_CON1, PWR1_ASM_CON1_INIT_VAL);
regmap_write(afe->regmap, PWR2_ASM_CON1, PWR2_ASM_CON1_INIT_VAL);
return 0;
}
int mt2701_afe_disable_clock(struct mtk_base_afe *afe)
{
regmap_update_bits(afe->regmap, ASYS_TOP_CON,
ASYS_TOP_CON_ASYS_TIMING_ON, 0);
regmap_update_bits(afe->regmap, AFE_DAC_CON0,
AFE_DAC_CON0_AFE_ON, 0);
mt2701_afe_disable_audsys(afe);
return 0;
}
int mt2701_mclk_configuration(struct mtk_base_afe *afe, int id)
{
struct mt2701_afe_private *priv = afe->platform_priv;
struct mt2701_i2s_path *i2s_path = &priv->i2s_path[id];
int ret = -EINVAL;
/* Set mclk source */
if (!(MT2701_PLL_DOMAIN_0_RATE % i2s_path->mclk_rate))
ret = clk_set_parent(i2s_path->sel_ck,
priv->base_ck[MT2701_TOP_AUD_MCLK_SRC0]);
else if (!(MT2701_PLL_DOMAIN_1_RATE % i2s_path->mclk_rate))
ret = clk_set_parent(i2s_path->sel_ck,
priv->base_ck[MT2701_TOP_AUD_MCLK_SRC1]);
if (ret) {
dev_err(afe->dev, "failed to set mclk source\n");
return ret;
}
/* Set mclk divider */
ret = clk_set_rate(i2s_path->div_ck, i2s_path->mclk_rate);
if (ret) {
dev_err(afe->dev, "failed to set mclk divider %d\n", ret);
return ret;
}
return 0;
}
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