1 /* 2 * Copyright (ST) 2012 Rajeev Kumar (rajeevkumar.linux@gmail.com) 3 * 4 * This file is licensed under the terms of the GNU General Public 5 * License version 2. This program is licensed "as is" without any 6 * warranty of any kind, whether express or implied. 7 */ 8 9 #ifndef __DESIGNWARE_LOCAL_H 10 #define __DESIGNWARE_LOCAL_H 11 12 #include <linux/clk.h> 13 #include <linux/device.h> 14 #include <linux/types.h> 15 #include <sound/dmaengine_pcm.h> 16 #include <sound/pcm.h> 17 #include <sound/designware_i2s.h> 18 19 /* common register for all channel */ 20 #define IER 0x000 21 #define IRER 0x004 22 #define ITER 0x008 23 #define CER 0x00C 24 #define CCR 0x010 25 #define RXFFR 0x014 26 #define TXFFR 0x018 27 28 /* Interrupt status register fields */ 29 #define ISR_TXFO BIT(5) 30 #define ISR_TXFE BIT(4) 31 #define ISR_RXFO BIT(1) 32 #define ISR_RXDA BIT(0) 33 34 /* I2STxRxRegisters for all channels */ 35 #define LRBR_LTHR(x) (0x40 * x + 0x020) 36 #define RRBR_RTHR(x) (0x40 * x + 0x024) 37 #define RER(x) (0x40 * x + 0x028) 38 #define TER(x) (0x40 * x + 0x02C) 39 #define RCR(x) (0x40 * x + 0x030) 40 #define TCR(x) (0x40 * x + 0x034) 41 #define ISR(x) (0x40 * x + 0x038) 42 #define IMR(x) (0x40 * x + 0x03C) 43 #define ROR(x) (0x40 * x + 0x040) 44 #define TOR(x) (0x40 * x + 0x044) 45 #define RFCR(x) (0x40 * x + 0x048) 46 #define TFCR(x) (0x40 * x + 0x04C) 47 #define RFF(x) (0x40 * x + 0x050) 48 #define TFF(x) (0x40 * x + 0x054) 49 50 /* I2SCOMPRegisters */ 51 #define I2S_COMP_PARAM_2 0x01F0 52 #define I2S_COMP_PARAM_1 0x01F4 53 #define I2S_COMP_VERSION 0x01F8 54 #define I2S_COMP_TYPE 0x01FC 55 56 /* 57 * Component parameter register fields - define the I2S block's 58 * configuration. 59 */ 60 #define COMP1_TX_WORDSIZE_3(r) (((r) & GENMASK(27, 25)) >> 25) 61 #define COMP1_TX_WORDSIZE_2(r) (((r) & GENMASK(24, 22)) >> 22) 62 #define COMP1_TX_WORDSIZE_1(r) (((r) & GENMASK(21, 19)) >> 19) 63 #define COMP1_TX_WORDSIZE_0(r) (((r) & GENMASK(18, 16)) >> 16) 64 #define COMP1_TX_CHANNELS(r) (((r) & GENMASK(10, 9)) >> 9) 65 #define COMP1_RX_CHANNELS(r) (((r) & GENMASK(8, 7)) >> 7) 66 #define COMP1_RX_ENABLED(r) (((r) & BIT(6)) >> 6) 67 #define COMP1_TX_ENABLED(r) (((r) & BIT(5)) >> 5) 68 #define COMP1_MODE_EN(r) (((r) & BIT(4)) >> 4) 69 #define COMP1_FIFO_DEPTH_GLOBAL(r) (((r) & GENMASK(3, 2)) >> 2) 70 #define COMP1_APB_DATA_WIDTH(r) (((r) & GENMASK(1, 0)) >> 0) 71 72 #define COMP2_RX_WORDSIZE_3(r) (((r) & GENMASK(12, 10)) >> 10) 73 #define COMP2_RX_WORDSIZE_2(r) (((r) & GENMASK(9, 7)) >> 7) 74 #define COMP2_RX_WORDSIZE_1(r) (((r) & GENMASK(5, 3)) >> 3) 75 #define COMP2_RX_WORDSIZE_0(r) (((r) & GENMASK(2, 0)) >> 0) 76 77 /* Number of entries in WORDSIZE and DATA_WIDTH parameter registers */ 78 #define COMP_MAX_WORDSIZE (1 << 3) 79 #define COMP_MAX_DATA_WIDTH (1 << 2) 80 81 #define MAX_CHANNEL_NUM 8 82 #define MIN_CHANNEL_NUM 2 83 84 union dw_i2s_snd_dma_data { 85 struct i2s_dma_data pd; 86 struct snd_dmaengine_dai_dma_data dt; 87 }; 88 89 struct dw_i2s_dev { 90 void __iomem *i2s_base; 91 struct clk *clk; 92 int active; 93 unsigned int capability; 94 unsigned int quirks; 95 unsigned int i2s_reg_comp1; 96 unsigned int i2s_reg_comp2; 97 struct device *dev; 98 u32 ccr; 99 u32 xfer_resolution; 100 u32 fifo_th; 101 102 /* data related to DMA transfers b/w i2s and DMAC */ 103 union dw_i2s_snd_dma_data play_dma_data; 104 union dw_i2s_snd_dma_data capture_dma_data; 105 struct i2s_clk_config_data config; 106 int (*i2s_clk_cfg)(struct i2s_clk_config_data *config); 107 108 /* data related to PIO transfers */ 109 bool use_pio; 110 struct snd_pcm_substream __rcu *tx_substream; 111 struct snd_pcm_substream __rcu *rx_substream; 112 unsigned int (*tx_fn)(struct dw_i2s_dev *dev, 113 struct snd_pcm_runtime *runtime, unsigned int tx_ptr, 114 bool *period_elapsed); 115 unsigned int (*rx_fn)(struct dw_i2s_dev *dev, 116 struct snd_pcm_runtime *runtime, unsigned int rx_ptr, 117 bool *period_elapsed); 118 unsigned int tx_ptr; 119 unsigned int rx_ptr; 120 }; 121 122 #if IS_ENABLED(CONFIG_SND_DESIGNWARE_PCM) 123 void dw_pcm_push_tx(struct dw_i2s_dev *dev); 124 void dw_pcm_pop_rx(struct dw_i2s_dev *dev); 125 int dw_pcm_register(struct platform_device *pdev); 126 #else 127 void dw_pcm_push_tx(struct dw_i2s_dev *dev) { } 128 void dw_pcm_pop_rx(struct dw_i2s_dev *dev) { } 129 int dw_pcm_register(struct platform_device *pdev) 130 { 131 return -EINVAL; 132 } 133 #endif 134 135 #endif 136