1 files changed, 71 insertions, 0 deletions
diff --git a/sound/soc/loongson/loongson_i2s.h b/sound/soc/loongson/loongson_i2s.h
new file mode 100644
index 0000000000..89492eebf8
--- /dev/null
+++ b/sound/soc/loongson/loongson_i2s.h
@@ -0,0 +1,71 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * ALSA I2S interface for the Loongson platform
+ *
+ * Copyright (C) 2023 Loongson Technology Corporation Limited
+ * Author: Yingkun Meng <mengyingkun@loongson.cn>
+ */
+
+#ifndef _LOONGSON_I2S_H
+#define _LOONGSON_I2S_H
+
+#include <linux/regmap.h>
+#include <sound/dmaengine_pcm.h>
+
+/* I2S Common Registers */
+#define LS_I2S_VER	0x00 /* I2S Version */
+#define LS_I2S_CFG	0x04 /* I2S Config */
+#define LS_I2S_CTRL	0x08 /* I2S Control */
+#define LS_I2S_RX_DATA	0x0C /* I2S DMA RX Address */
+#define LS_I2S_TX_DATA	0x10 /* I2S DMA TX Address */
+
+/* 2K2000 I2S Specify Registers */
+#define LS_I2S_CFG1	0x14 /* I2S Config1 */
+
+/* 7A2000 I2S Specify Registers */
+#define LS_I2S_TX_ORDER	0x100 /* TX DMA Order */
+#define LS_I2S_RX_ORDER 0x110 /* RX DMA Order */
+
+/* Loongson I2S Control Register */
+#define I2S_CTRL_MCLK_READY	(1 << 16) /* MCLK ready */
+#define I2S_CTRL_MASTER		(1 << 15) /* Master mode */
+#define I2S_CTRL_MSB		(1 << 14) /* MSB bit order */
+#define I2S_CTRL_RX_EN		(1 << 13) /* RX enable */
+#define I2S_CTRL_TX_EN		(1 << 12) /* TX enable */
+#define I2S_CTRL_RX_DMA_EN	(1 << 11) /* DMA RX enable */
+#define I2S_CTRL_CLK_READY	(1 << 8)  /* BCLK ready */
+#define I2S_CTRL_TX_DMA_EN	(1 << 7)  /* DMA TX enable */
+#define I2S_CTRL_RESET		(1 << 4)  /* Controller soft reset */
+#define I2S_CTRL_MCLK_EN	(1 << 3)  /* Enable MCLK */
+#define I2S_CTRL_RX_INT_EN	(1 << 1)  /* RX interrupt enable */
+#define I2S_CTRL_TX_INT_EN	(1 << 0)  /* TX interrupt enable */
+
+#define LS_I2S_DRVNAME		"loongson-i2s"
+
+struct loongson_dma_data {
+	dma_addr_t dev_addr;		/* device physical address for DMA */
+	void __iomem *order_addr;	/* DMA order register */
+	int irq;			/* DMA irq */
+};
+
+struct loongson_i2s {
+	struct device *dev;
+	union {
+		struct snd_dmaengine_dai_dma_data playback_dma_data;
+		struct loongson_dma_data tx_dma_data;
+	};
+	union {
+		struct snd_dmaengine_dai_dma_data capture_dma_data;
+		struct loongson_dma_data rx_dma_data;
+	};
+	struct regmap *regmap;
+	void __iomem *reg_base;
+	u32 rev_id;
+	u32 clk_rate;
+	u32 sysclk;
+};
+
+extern const struct dev_pm_ops loongson_i2s_pm;
+extern struct snd_soc_dai_driver loongson_i2s_dai;
+
+#endif