ASoC: qdsp6: q6afe: Add support to MI2S ports

This patch adds support to 4 MI2S ports on LPASS.
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Reviewed-and-tested-by: Rohit kumar <rohitkr@codeaurora.org>
Reviewed-by: Banajit Goswami <bgoswami@codeaurora.org>
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/qcom/qdsp6/q6afe.c

@@ -15,6 +15,10 @@
 #include <linux/spinlock.h>
 #include <linux/delay.h>
 #include <linux/soc/qcom/apr.h>
+#include <sound/soc.h>
+#include <sound/soc-dai.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
 #include "q6dsp-errno.h"
 #include "q6core.h"
 #include "q6afe.h"
@@ -31,6 +35,32 @@
 #define AFE_PARAM_ID_CDC_SLIMBUS_SLAVE_CFG 0x00010235
 
 #define AFE_PARAM_ID_SLIMBUS_CONFIG    0x00010212
+#define AFE_PARAM_ID_I2S_CONFIG	0x0001020D
+
+/* I2S config specific */
+#define AFE_API_VERSION_I2S_CONFIG	0x1
+#define AFE_PORT_I2S_SD0		0x1
+#define AFE_PORT_I2S_SD1		0x2
+#define AFE_PORT_I2S_SD2		0x3
+#define AFE_PORT_I2S_SD3		0x4
+#define AFE_PORT_I2S_SD0_MASK		BIT(0x1)
+#define AFE_PORT_I2S_SD1_MASK		BIT(0x2)
+#define AFE_PORT_I2S_SD2_MASK		BIT(0x3)
+#define AFE_PORT_I2S_SD3_MASK		BIT(0x4)
+#define AFE_PORT_I2S_SD0_1_MASK		GENMASK(2, 1)
+#define AFE_PORT_I2S_SD2_3_MASK		GENMASK(4, 3)
+#define AFE_PORT_I2S_SD0_1_2_MASK	GENMASK(3, 1)
+#define AFE_PORT_I2S_SD0_1_2_3_MASK	GENMASK(4, 1)
+#define AFE_PORT_I2S_QUAD01		0x5
+#define AFE_PORT_I2S_QUAD23		0x6
+#define AFE_PORT_I2S_6CHS		0x7
+#define AFE_PORT_I2S_8CHS		0x8
+#define AFE_PORT_I2S_MONO		0x0
+#define AFE_PORT_I2S_STEREO		0x1
+#define AFE_PORT_CONFIG_I2S_WS_SRC_EXTERNAL	0x0
+#define AFE_PORT_CONFIG_I2S_WS_SRC_INTERNAL	0x1
+#define AFE_LINEAR_PCM_DATA				0x0
+
 
 /* Port IDs */
 #define AFE_API_VERSION_HDMI_CONFIG	0x1
@@ -66,6 +96,19 @@
 #define AFE_PORT_ID_SLIMBUS_MULTI_CHAN_6_RX      0x400c
 /* SLIMbus Tx port on channel 6. */
 #define AFE_PORT_ID_SLIMBUS_MULTI_CHAN_6_TX      0x400d
+#define AFE_PORT_ID_PRIMARY_MI2S_RX         0x1000
+#define AFE_PORT_ID_PRIMARY_MI2S_TX         0x1001
+#define AFE_PORT_ID_SECONDARY_MI2S_RX       0x1002
+#define AFE_PORT_ID_SECONDARY_MI2S_TX       0x1003
+#define AFE_PORT_ID_TERTIARY_MI2S_RX        0x1004
+#define AFE_PORT_ID_TERTIARY_MI2S_TX        0x1005
+#define AFE_PORT_ID_QUATERNARY_MI2S_RX      0x1006
+#define AFE_PORT_ID_QUATERNARY_MI2S_TX      0x1007
+
+#define Q6AFE_LPASS_MODE_CLK1_VALID 1
+#define Q6AFE_LPASS_MODE_CLK2_VALID 2
+#define Q6AFE_LPASS_CLK_SRC_INTERNAL 1
+#define Q6AFE_LPASS_CLK_ROOT_DEFAULT 0
 
 #define TIMEOUT_MS 1000
 #define AFE_CMD_RESP_AVAIL	0
@@ -159,10 +202,21 @@ struct afe_param_id_slimbus_cfg {
  */
 } __packed;
 
+struct afe_param_id_i2s_cfg {
+	u32	i2s_cfg_minor_version;
+	u16	bit_width;
+	u16	channel_mode;
+	u16	mono_stereo;
+	u16	ws_src;
+	u32	sample_rate;
+	u16	data_format;
+	u16	reserved;
+} __packed;
 
 union afe_port_config {
 	struct afe_param_id_hdmi_multi_chan_audio_cfg hdmi_multi_ch;
 	struct afe_param_id_slimbus_cfg           slim_cfg;
+	struct afe_param_id_i2s_cfg	i2s_cfg;
 } __packed;
 
 struct q6afe_port {
@@ -206,6 +260,22 @@ static struct afe_port_map port_maps[AFE_PORT_MAX] = {
 				SLIMBUS_5_RX, 1, 1},
 	[SLIMBUS_6_RX] = { AFE_PORT_ID_SLIMBUS_MULTI_CHAN_6_RX,
 				SLIMBUS_6_RX, 1, 1},
+	[PRIMARY_MI2S_RX] = { AFE_PORT_ID_PRIMARY_MI2S_RX,
+				PRIMARY_MI2S_RX, 1, 1},
+	[PRIMARY_MI2S_TX] = { AFE_PORT_ID_PRIMARY_MI2S_TX,
+				PRIMARY_MI2S_RX, 0, 1},
+	[SECONDARY_MI2S_RX] = { AFE_PORT_ID_SECONDARY_MI2S_RX,
+				SECONDARY_MI2S_RX, 1, 1},
+	[SECONDARY_MI2S_TX] = { AFE_PORT_ID_SECONDARY_MI2S_TX,
+				SECONDARY_MI2S_TX, 0, 1},
+	[TERTIARY_MI2S_RX] = { AFE_PORT_ID_TERTIARY_MI2S_RX,
+				TERTIARY_MI2S_RX, 1, 1},
+	[TERTIARY_MI2S_TX] = { AFE_PORT_ID_TERTIARY_MI2S_TX,
+				TERTIARY_MI2S_TX, 0, 1},
+	[QUATERNARY_MI2S_RX] = { AFE_PORT_ID_QUATERNARY_MI2S_RX,
+				QUATERNARY_MI2S_RX, 1, 1},
+	[QUATERNARY_MI2S_TX] = { AFE_PORT_ID_QUATERNARY_MI2S_TX,
+				QUATERNARY_MI2S_TX, 0, 1},
 };
 
 static void q6afe_port_free(struct kref *ref)
@@ -481,6 +551,149 @@ void q6afe_hdmi_port_prepare(struct q6afe_port *port,
 }
 EXPORT_SYMBOL_GPL(q6afe_hdmi_port_prepare);
 
+/**
+ * q6afe_i2s_port_prepare() - Prepare i2s afe port.
+ *
+ * @port: Instance of afe port
+ * @cfg: I2S configuration for the afe port
+ * Return: Will be an negative on error and zero on success.
+ */
+int q6afe_i2s_port_prepare(struct q6afe_port *port, struct q6afe_i2s_cfg *cfg)
+{
+	union afe_port_config *pcfg = &port->port_cfg;
+	struct device *dev = port->afe->dev;
+	int num_sd_lines;
+
+	pcfg->i2s_cfg.i2s_cfg_minor_version = AFE_API_VERSION_I2S_CONFIG;
+	pcfg->i2s_cfg.sample_rate = cfg->sample_rate;
+	pcfg->i2s_cfg.bit_width = cfg->bit_width;
+	pcfg->i2s_cfg.data_format = AFE_LINEAR_PCM_DATA;
+
+	switch (cfg->fmt & SND_SOC_DAIFMT_MASTER_MASK) {
+	case SND_SOC_DAIFMT_CBS_CFS:
+		pcfg->i2s_cfg.ws_src = AFE_PORT_CONFIG_I2S_WS_SRC_INTERNAL;
+		break;
+	case SND_SOC_DAIFMT_CBM_CFM:
+		/* CPU is slave */
+		pcfg->i2s_cfg.ws_src = AFE_PORT_CONFIG_I2S_WS_SRC_EXTERNAL;
+		break;
+	default:
+		break;
+	}
+
+	num_sd_lines = hweight_long(cfg->sd_line_mask);
+
+	switch (num_sd_lines) {
+	case 0:
+		dev_err(dev, "no line is assigned\n");
+		return -EINVAL;
+	case 1:
+		switch (cfg->sd_line_mask) {
+		case AFE_PORT_I2S_SD0_MASK:
+			pcfg->i2s_cfg.channel_mode = AFE_PORT_I2S_SD0;
+			break;
+		case AFE_PORT_I2S_SD1_MASK:
+			pcfg->i2s_cfg.channel_mode = AFE_PORT_I2S_SD1;
+			break;
+		case AFE_PORT_I2S_SD2_MASK:
+			pcfg->i2s_cfg.channel_mode = AFE_PORT_I2S_SD2;
+			break;
+		case AFE_PORT_I2S_SD3_MASK:
+			pcfg->i2s_cfg.channel_mode = AFE_PORT_I2S_SD3;
+			break;
+		default:
+			dev_err(dev, "Invalid SD lines\n");
+			return -EINVAL;
+		}
+		break;
+	case 2:
+		switch (cfg->sd_line_mask) {
+		case AFE_PORT_I2S_SD0_1_MASK:
+			pcfg->i2s_cfg.channel_mode = AFE_PORT_I2S_QUAD01;
+			break;
+		case AFE_PORT_I2S_SD2_3_MASK:
+			pcfg->i2s_cfg.channel_mode = AFE_PORT_I2S_QUAD23;
+			break;
+		default:
+			dev_err(dev, "Invalid SD lines\n");
+			return -EINVAL;
+		}
+		break;
+	case 3:
+		switch (cfg->sd_line_mask) {
+		case AFE_PORT_I2S_SD0_1_2_MASK:
+			pcfg->i2s_cfg.channel_mode = AFE_PORT_I2S_6CHS;
+			break;
+		default:
+			dev_err(dev, "Invalid SD lines\n");
+			return -EINVAL;
+		}
+		break;
+	case 4:
+		switch (cfg->sd_line_mask) {
+		case AFE_PORT_I2S_SD0_1_2_3_MASK:
+			pcfg->i2s_cfg.channel_mode = AFE_PORT_I2S_8CHS;
+
+			break;
+		default:
+			dev_err(dev, "Invalid SD lines\n");
+			return -EINVAL;
+		}
+		break;
+	default:
+		dev_err(dev, "Invalid SD lines\n");
+		return -EINVAL;
+	}
+
+	switch (cfg->num_channels) {
+	case 1:
+	case 2:
+		switch (pcfg->i2s_cfg.channel_mode) {
+		case AFE_PORT_I2S_QUAD01:
+		case AFE_PORT_I2S_6CHS:
+		case AFE_PORT_I2S_8CHS:
+			pcfg->i2s_cfg.channel_mode = AFE_PORT_I2S_SD0;
+			break;
+		case AFE_PORT_I2S_QUAD23:
+				pcfg->i2s_cfg.channel_mode = AFE_PORT_I2S_SD2;
+			break;
+		}
+
+		if (cfg->num_channels == 2)
+			pcfg->i2s_cfg.mono_stereo = AFE_PORT_I2S_STEREO;
+		else
+			pcfg->i2s_cfg.mono_stereo = AFE_PORT_I2S_MONO;
+
+		break;
+	case 3:
+	case 4:
+		if (pcfg->i2s_cfg.channel_mode < AFE_PORT_I2S_QUAD01) {
+			dev_err(dev, "Invalid Channel mode\n");
+			return -EINVAL;
+		}
+		break;
+	case 5:
+	case 6:
+		if (pcfg->i2s_cfg.channel_mode < AFE_PORT_I2S_6CHS) {
+			dev_err(dev, "Invalid Channel mode\n");
+			return -EINVAL;
+		}
+		break;
+	case 7:
+	case 8:
+		if (pcfg->i2s_cfg.channel_mode < AFE_PORT_I2S_8CHS) {
+			dev_err(dev, "Invalid Channel mode\n");
+			return -EINVAL;
+		}
+		break;
+	default:
+		break;
+	}
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(q6afe_i2s_port_prepare);
+
 /**
  * q6afe_port_start() - Start a afe port
  *
@@ -580,6 +793,17 @@ struct q6afe_port *q6afe_port_get_from_id(struct device *dev, int id)
 	case AFE_PORT_ID_SLIMBUS_MULTI_CHAN_6_RX:
 		cfg_type = AFE_PARAM_ID_SLIMBUS_CONFIG;
 		break;
+
+	case AFE_PORT_ID_PRIMARY_MI2S_RX:
+	case AFE_PORT_ID_PRIMARY_MI2S_TX:
+	case AFE_PORT_ID_SECONDARY_MI2S_RX:
+	case AFE_PORT_ID_SECONDARY_MI2S_TX:
+	case AFE_PORT_ID_TERTIARY_MI2S_RX:
+	case AFE_PORT_ID_TERTIARY_MI2S_TX:
+	case AFE_PORT_ID_QUATERNARY_MI2S_RX:
+	case AFE_PORT_ID_QUATERNARY_MI2S_TX:
+		cfg_type = AFE_PARAM_ID_I2S_CONFIG;
+		break;
 	default:
 		dev_err(dev, "Invalid port id 0x%x\n", port_id);
 		return ERR_PTR(-EINVAL);

sound/soc/qcom/qdsp6/q6afe.h

@@ -11,6 +11,8 @@
 #define MSM_AFE_PORT_TYPE_TX 1
 #define AFE_MAX_PORTS AFE_PORT_MAX
 
+#define Q6AFE_MAX_MI2S_LINES	4
+
 #define AFE_MAX_CHAN_COUNT	8
 #define AFE_PORT_MAX_AUDIO_CHAN_CNT	0x8
 
@@ -29,9 +31,19 @@ struct q6afe_slim_cfg {
 	u8	ch_mapping[AFE_MAX_CHAN_COUNT];
 };
 
+struct q6afe_i2s_cfg {
+	u32	sample_rate;
+	u16	bit_width;
+	u16	data_format;
+	u16	num_channels;
+	u32	sd_line_mask;
+	int fmt;
+};
+
 struct q6afe_port_config {
 	struct q6afe_hdmi_cfg hdmi;
 	struct q6afe_slim_cfg slim;
+	struct q6afe_i2s_cfg i2s_cfg;
 };
 
 struct q6afe_port;
@@ -45,5 +57,6 @@ void q6afe_hdmi_port_prepare(struct q6afe_port *port,
 			    struct q6afe_hdmi_cfg *cfg);
 void q6afe_slim_port_prepare(struct q6afe_port *port,
 			  struct q6afe_slim_cfg *cfg);
+int q6afe_i2s_port_prepare(struct q6afe_port *port, struct q6afe_i2s_cfg *cfg);
 
 #endif /* __Q6AFE_H__ */