[v4,12/18] ASoC: mediatek: mt8186: support gpio control in platform driver

diff --git a/sound/soc/mediatek/mt8186/mt8186-afe-gpio.c b/sound/soc/mediatek/mt8186/mt8186-afe-gpio.c
new file mode 100644
index 000000000000..5ba28095b7da
--- /dev/null
+++ b/sound/soc/mediatek/mt8186/mt8186-afe-gpio.c
@@ -0,0 +1,244 @@ 
+// SPDX-License-Identifier: GPL-2.0
+//
+// mt8186-afe-gpio.c  --  Mediatek 8186 afe gpio ctrl
+//
+// Copyright (c) 2022 MediaTek Inc.
+// Author: Jiaxin Yu <jiaxin.yu@mediatek.com>
+
+#include <linux/gpio.h>
+#include <linux/pinctrl/consumer.h>
+
+#include "mt8186-afe-common.h"
+#include "mt8186-afe-gpio.h"
+
+struct pinctrl *aud_pinctrl;
+
+enum mt8186_afe_gpio {
+	MT8186_AFE_GPIO_CLK_MOSI_OFF,
+	MT8186_AFE_GPIO_CLK_MOSI_ON,
+	MT8186_AFE_GPIO_CLK_MISO_OFF,
+	MT8186_AFE_GPIO_CLK_MISO_ON,
+	MT8186_AFE_GPIO_DAT_MISO_OFF,
+	MT8186_AFE_GPIO_DAT_MISO_ON,
+	MT8186_AFE_GPIO_DAT_MOSI_OFF,
+	MT8186_AFE_GPIO_DAT_MOSI_ON,
+	MT8186_AFE_GPIO_I2S0_OFF,
+	MT8186_AFE_GPIO_I2S0_ON,
+	MT8186_AFE_GPIO_I2S1_OFF,
+	MT8186_AFE_GPIO_I2S1_ON,
+	MT8186_AFE_GPIO_I2S2_OFF,
+	MT8186_AFE_GPIO_I2S2_ON,
+	MT8186_AFE_GPIO_I2S3_OFF,
+	MT8186_AFE_GPIO_I2S3_ON,
+	MT8186_AFE_GPIO_TDM_OFF,
+	MT8186_AFE_GPIO_TDM_ON,
+	MT8186_AFE_GPIO_PCM_OFF,
+	MT8186_AFE_GPIO_PCM_ON,
+	MT8186_AFE_GPIO_GPIO_NUM
+};
+
+struct audio_gpio_attr {
+	const char *name;
+	bool gpio_prepare;
+	struct pinctrl_state *gpioctrl;
+};
+
+static struct audio_gpio_attr aud_gpios[MT8186_AFE_GPIO_GPIO_NUM] = {
+	[MT8186_AFE_GPIO_CLK_MOSI_OFF] = {"aud_clk_mosi_off", false, NULL},
+	[MT8186_AFE_GPIO_CLK_MOSI_ON] = {"aud_clk_mosi_on", false, NULL},
+	[MT8186_AFE_GPIO_CLK_MISO_OFF] = {"aud_clk_miso_off", false, NULL},
+	[MT8186_AFE_GPIO_CLK_MISO_ON] = {"aud_clk_miso_on", false, NULL},
+	[MT8186_AFE_GPIO_DAT_MISO_OFF] = {"aud_dat_miso_off", false, NULL},
+	[MT8186_AFE_GPIO_DAT_MISO_ON] = {"aud_dat_miso_on", false, NULL},
+	[MT8186_AFE_GPIO_DAT_MOSI_OFF] = {"aud_dat_mosi_off", false, NULL},
+	[MT8186_AFE_GPIO_DAT_MOSI_ON] = {"aud_dat_mosi_on", false, NULL},
+	[MT8186_AFE_GPIO_I2S0_OFF] = {"aud_gpio_i2s0_off", false, NULL},
+	[MT8186_AFE_GPIO_I2S0_ON] = {"aud_gpio_i2s0_on", false, NULL},
+	[MT8186_AFE_GPIO_I2S1_OFF] = {"aud_gpio_i2s1_off", false, NULL},
+	[MT8186_AFE_GPIO_I2S1_ON] = {"aud_gpio_i2s1_on", false, NULL},
+	[MT8186_AFE_GPIO_I2S2_OFF] = {"aud_gpio_i2s2_off", false, NULL},
+	[MT8186_AFE_GPIO_I2S2_ON] = {"aud_gpio_i2s2_on", false, NULL},
+	[MT8186_AFE_GPIO_I2S3_OFF] = {"aud_gpio_i2s3_off", false, NULL},
+	[MT8186_AFE_GPIO_I2S3_ON] = {"aud_gpio_i2s3_on", false, NULL},
+	[MT8186_AFE_GPIO_TDM_OFF] = {"aud_gpio_tdm_off", false, NULL},
+	[MT8186_AFE_GPIO_TDM_ON] = {"aud_gpio_tdm_on", false, NULL},
+	[MT8186_AFE_GPIO_PCM_OFF] = {"aud_gpio_pcm_off", false, NULL},
+	[MT8186_AFE_GPIO_PCM_ON] = {"aud_gpio_pcm_on", false, NULL},
+};
+
+static DEFINE_MUTEX(gpio_request_mutex);
+
+int mt8186_afe_gpio_init(struct device *dev)
+{
+	int i, j, ret;
+
+	aud_pinctrl = devm_pinctrl_get(dev);
+	if (IS_ERR(aud_pinctrl)) {
+		ret = PTR_ERR(aud_pinctrl);
+		dev_err(dev, "%s(), ret %d, cannot get aud_pinctrl!\n",
+			__func__, ret);
+		return ret;
+	}
+
+	for (i = 0; i < ARRAY_SIZE(aud_gpios); i++) {
+		aud_gpios[i].gpioctrl = pinctrl_lookup_state(aud_pinctrl,
+							     aud_gpios[i].name);
+		if (IS_ERR(aud_gpios[i].gpioctrl)) {
+			ret = PTR_ERR(aud_gpios[i].gpioctrl);
+			dev_info(dev, "%s(), pinctrl_lookup_state %s fail, ret %d\n",
+				 __func__, aud_gpios[i].name, ret);
+		} else {
+			aud_gpios[i].gpio_prepare = true;
+		}
+	}
+
+	/* gpio status init */
+	for (i = MT8186_DAI_ADDA; i <= MT8186_DAI_TDM_IN; i++) {
+		for (j = 0; j <= 1; j++)
+			mt8186_afe_gpio_request(dev, false, i, j);
+	}
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(mt8186_afe_gpio_init);
+
+static int mt8186_afe_gpio_select(struct device *dev,
+				  enum mt8186_afe_gpio type)
+{
+	int ret = 0;
+
+	if (type < 0 || type >= MT8186_AFE_GPIO_GPIO_NUM) {
+		dev_err(dev, "%s(), error, invalid gpio type %d\n",
+			__func__, type);
+		return -EINVAL;
+	}
+
+	if (!aud_gpios[type].gpio_prepare) {
+		dev_err(dev, "%s(), error, gpio type %d not prepared\n",
+			__func__, type);
+		return -EIO;
+	}
+
+	ret = pinctrl_select_state(aud_pinctrl,
+				   aud_gpios[type].gpioctrl);
+	if (ret) {
+		dev_err(dev, "%s(), error, can not set gpio type %d\n",
+			__func__, type);
+		return ret;
+	}
+
+	return 0;
+}
+
+static int mt8186_afe_gpio_adda_dl(struct device *dev, bool enable)
+{
+	int ret;
+
+	if (enable) {
+		ret = mt8186_afe_gpio_select(dev, MT8186_AFE_GPIO_CLK_MOSI_ON);
+		if (ret) {
+			dev_err(dev, "%s(), MOSI CLK ON slect fail!\n", __func__);
+			return ret;
+		}
+
+		ret = mt8186_afe_gpio_select(dev, MT8186_AFE_GPIO_DAT_MOSI_ON);
+		if (ret) {
+			dev_err(dev, "%s(), MOSI DAT ON slect fail!\n", __func__);
+			return ret;
+		}
+	} else {
+		ret = mt8186_afe_gpio_select(dev, MT8186_AFE_GPIO_DAT_MOSI_OFF);
+		if (ret) {
+			dev_err(dev, "%s(), MOSI DAT OFF slect fail!\n", __func__);
+			return ret;
+		}
+
+		ret = mt8186_afe_gpio_select(dev, MT8186_AFE_GPIO_CLK_MOSI_OFF);
+		if (ret) {
+			dev_err(dev, "%s(), MOSI CLK ON slect fail!\n", __func__);
+			return ret;
+		}
+	}
+
+	return 0;
+}
+
+static int mt8186_afe_gpio_adda_ul(struct device *dev, bool enable)
+{
+	int ret;
+
+	if (enable) {
+		ret = mt8186_afe_gpio_select(dev, MT8186_AFE_GPIO_CLK_MISO_ON);
+		if (ret) {
+			dev_err(dev, "%s(), MISO CLK ON slect fail!\n", __func__);
+			return ret;
+		}
+
+		ret = mt8186_afe_gpio_select(dev, MT8186_AFE_GPIO_DAT_MISO_ON);
+		if (ret) {
+			dev_err(dev, "%s(), MISO DAT ON slect fail!\n", __func__);
+			return ret;
+		}
+	} else {
+		ret = mt8186_afe_gpio_select(dev, MT8186_AFE_GPIO_DAT_MISO_OFF);
+		if (ret) {
+			dev_err(dev, "%s(), MISO DAT OFF slect fail!\n", __func__);
+			return ret;
+		}
+
+		ret = mt8186_afe_gpio_select(dev, MT8186_AFE_GPIO_CLK_MISO_OFF);
+		if (ret) {
+			dev_err(dev, "%s(), MISO CLK OFF slect fail!\n", __func__);
+			return ret;
+		}
+	}
+
+	return 0;
+}
+
+int mt8186_afe_gpio_request(struct device *dev, bool enable,
+			    int dai, int uplink)
+{
+	enum mt8186_afe_gpio sel;
+	int ret = -EINVAL;
+
+	mutex_lock(&gpio_request_mutex);
+
+	switch (dai) {
+	case MT8186_DAI_ADDA:
+		if (uplink)
+			ret = mt8186_afe_gpio_adda_ul(dev, enable);
+		else
+			ret = mt8186_afe_gpio_adda_dl(dev, enable);
+		goto unlock;
+	case MT8186_DAI_I2S_0:
+		sel = enable ? MT8186_AFE_GPIO_I2S0_ON : MT8186_AFE_GPIO_I2S0_OFF;
+		break;
+	case MT8186_DAI_I2S_1:
+		sel = enable ? MT8186_AFE_GPIO_I2S1_ON : MT8186_AFE_GPIO_I2S1_OFF;
+		break;
+	case MT8186_DAI_I2S_2:
+		sel = enable ? MT8186_AFE_GPIO_I2S2_ON : MT8186_AFE_GPIO_I2S2_OFF;
+		break;
+	case MT8186_DAI_I2S_3:
+		sel = enable ? MT8186_AFE_GPIO_I2S3_ON : MT8186_AFE_GPIO_I2S3_OFF;
+		break;
+	case MT8186_DAI_TDM_IN:
+		sel = enable ? MT8186_AFE_GPIO_TDM_ON : MT8186_AFE_GPIO_TDM_OFF;
+		break;
+	case MT8186_DAI_PCM:
+		sel = enable ? MT8186_AFE_GPIO_PCM_ON : MT8186_AFE_GPIO_PCM_OFF;
+		break;
+	default:
+		mutex_unlock(&gpio_request_mutex);
+		dev_err(dev, "%s(), invalid dai %d\n", __func__, dai);
+		goto unlock;
+	}
+
+	ret = mt8186_afe_gpio_select(dev, sel);
+
+unlock:
+	mutex_unlock(&gpio_request_mutex);
+
+	return ret;
+}
diff --git a/sound/soc/mediatek/mt8186/mt8186-afe-gpio.h b/sound/soc/mediatek/mt8186/mt8186-afe-gpio.h
new file mode 100644
index 000000000000..1ddc27838eb1
--- /dev/null
+++ b/sound/soc/mediatek/mt8186/mt8186-afe-gpio.h
@@ -0,0 +1,19 @@ 
+/* SPDX-License-Identifier: GPL-2.0
+ *
+ * mt6833-afe-gpio.h  --  Mediatek 6833 afe gpio ctrl definition
+ *
+ * Copyright (c) 2022 MediaTek Inc.
+ * Author: Jiaxin Yu <jiaxin.yu@mediatek.com>
+ */
+
+#ifndef _MT8186_AFE_GPIO_H_
+#define _MT8186_AFE_GPIO_H_
+
+struct mtk_base_afe;
+
+int mt8186_afe_gpio_init(struct device *dev);
+
+int mt8186_afe_gpio_request(struct device *dev, bool enable,
+			    int dai, int uplink);
+
+#endif