1/* SPDX-License-Identifier: GPL-2.0 */ 2/* 3 * ALSA I2S interface for the Loongson platform 4 * 5 * Copyright (C) 2023 Loongson Technology Corporation Limited 6 * Author: Yingkun Meng <mengyingkun@loongson.cn> 7 */ 8 9#ifndef _LOONGSON_I2S_H 10#define _LOONGSON_I2S_H 11 12#include <linux/regmap.h> 13#include <sound/dmaengine_pcm.h> 14 15/* I2S Common Registers */ 16#define LS_I2S_VER 0x00 /* I2S Version */ 17#define LS_I2S_CFG 0x04 /* I2S Config */ 18#define LS_I2S_CTRL 0x08 /* I2S Control */ 19#define LS_I2S_RX_DATA 0x0C /* I2S DMA RX Address */ 20#define LS_I2S_TX_DATA 0x10 /* I2S DMA TX Address */ 21 22/* 2K2000 I2S Specify Registers */ 23#define LS_I2S_CFG1 0x14 /* I2S Config1 */ 24 25/* 7A2000 I2S Specify Registers */ 26#define LS_I2S_TX_ORDER 0x100 /* TX DMA Order */ 27#define LS_I2S_RX_ORDER 0x110 /* RX DMA Order */ 28 29/* Loongson I2S Control Register */ 30#define I2S_CTRL_MCLK_READY (1 << 16) /* MCLK ready */ 31#define I2S_CTRL_MASTER (1 << 15) /* Master mode */ 32#define I2S_CTRL_MSB (1 << 14) /* MSB bit order */ 33#define I2S_CTRL_RX_EN (1 << 13) /* RX enable */ 34#define I2S_CTRL_TX_EN (1 << 12) /* TX enable */ 35#define I2S_CTRL_RX_DMA_EN (1 << 11) /* DMA RX enable */ 36#define I2S_CTRL_CLK_READY (1 << 8) /* BCLK ready */ 37#define I2S_CTRL_TX_DMA_EN (1 << 7) /* DMA TX enable */ 38#define I2S_CTRL_RESET (1 << 4) /* Controller soft reset */ 39#define I2S_CTRL_MCLK_EN (1 << 3) /* Enable MCLK */ 40#define I2S_CTRL_RX_INT_EN (1 << 1) /* RX interrupt enable */ 41#define I2S_CTRL_TX_INT_EN (1 << 0) /* TX interrupt enable */ 42 43#define LS_I2S_DRVNAME "loongson-i2s" 44 45struct loongson_dma_data { 46 dma_addr_t dev_addr; /* device physical address for DMA */ 47 void __iomem *order_addr; /* DMA order register */ 48 int irq; /* DMA irq */ 49}; 50 51struct loongson_i2s { 52 struct device *dev; 53 union { 54 struct snd_dmaengine_dai_dma_data playback_dma_data; 55 struct loongson_dma_data tx_dma_data; 56 }; 57 union { 58 struct snd_dmaengine_dai_dma_data capture_dma_data; 59 struct loongson_dma_data rx_dma_data; 60 }; 61 struct regmap *regmap; 62 void __iomem *reg_base; 63 u32 rev_id; 64 u32 clk_rate; 65 u32 sysclk; 66}; 67 68extern const struct dev_pm_ops loongson_i2s_pm; 69extern struct snd_soc_dai_driver loongson_i2s_dai; 70 71#endif 72