1 /* SPDX-License-Identifier: GPL-2.0 */
3 * Copyright (ST) 2012 Rajeev Kumar (rajeevkumar.linux@gmail.com)
5 * This file is licensed under the terms of the GNU General Public
6 * License version 2. This program is licensed "as is" without any
7 * warranty of any kind, whether express or implied.
10 #ifndef __STARFIVE_I2S_H
11 #define __STARFIVE_I2S_H
13 #include <linux/clk.h>
14 #include <linux/device.h>
15 #include <linux/types.h>
16 #include <sound/dmaengine_pcm.h>
17 #include <sound/pcm.h>
18 #include <sound/designware_i2s.h>
20 /* common register for all channel */
29 /* Interrupt status register fields */
30 #define ISR_TXFO BIT(5)
31 #define ISR_TXFE BIT(4)
32 #define ISR_RXFO BIT(1)
33 #define ISR_RXDA BIT(0)
35 /* I2STxRxRegisters for all channels */
36 #define LRBR_LTHR(x) (0x40 * x + 0x020)
37 #define RRBR_RTHR(x) (0x40 * x + 0x024)
38 #define RER(x) (0x40 * x + 0x028)
39 #define TER(x) (0x40 * x + 0x02C)
40 #define RCR(x) (0x40 * x + 0x030)
41 #define TCR(x) (0x40 * x + 0x034)
42 #define ISR(x) (0x40 * x + 0x038)
43 #define IMR(x) (0x40 * x + 0x03C)
44 #define ROR(x) (0x40 * x + 0x040)
45 #define TOR(x) (0x40 * x + 0x044)
46 #define RFCR(x) (0x40 * x + 0x048)
47 #define TFCR(x) (0x40 * x + 0x04C)
48 #define RFF(x) (0x40 * x + 0x050)
49 #define TFF(x) (0x40 * x + 0x054)
51 /* I2SCOMPRegisters */
52 #define I2S_COMP_PARAM_2 0x01F0
53 #define I2S_COMP_PARAM_1 0x01F4
54 #define I2S_COMP_VERSION 0x01F8
55 #define I2S_COMP_TYPE 0x01FC
58 * Component parameter register fields - define the I2S block's
61 #define COMP1_TX_WORDSIZE_3(r) (((r) & GENMASK(27, 25)) >> 25)
62 #define COMP1_TX_WORDSIZE_2(r) (((r) & GENMASK(24, 22)) >> 22)
63 #define COMP1_TX_WORDSIZE_1(r) (((r) & GENMASK(21, 19)) >> 19)
64 #define COMP1_TX_WORDSIZE_0(r) (((r) & GENMASK(18, 16)) >> 16)
65 #define COMP1_TX_CHANNELS(r) (((r) & GENMASK(10, 9)) >> 9)
66 #define COMP1_RX_CHANNELS(r) (((r) & GENMASK(8, 7)) >> 7)
67 #define COMP1_RX_ENABLED(r) (((r) & BIT(6)) >> 6)
68 #define COMP1_TX_ENABLED(r) (((r) & BIT(5)) >> 5)
69 #define COMP1_MODE_EN(r) (((r) & BIT(4)) >> 4)
70 #define COMP1_FIFO_DEPTH_GLOBAL(r) (((r) & GENMASK(3, 2)) >> 2)
71 #define COMP1_APB_DATA_WIDTH(r) (((r) & GENMASK(1, 0)) >> 0)
73 #define COMP2_RX_WORDSIZE_3(r) (((r) & GENMASK(12, 10)) >> 10)
74 #define COMP2_RX_WORDSIZE_2(r) (((r) & GENMASK(9, 7)) >> 7)
75 #define COMP2_RX_WORDSIZE_1(r) (((r) & GENMASK(5, 3)) >> 3)
76 #define COMP2_RX_WORDSIZE_0(r) (((r) & GENMASK(2, 0)) >> 0)
78 /* Number of entries in WORDSIZE and DATA_WIDTH parameter registers */
79 #define COMP_MAX_WORDSIZE (1 << 3)
80 #define COMP_MAX_DATA_WIDTH (1 << 2)
82 #define MAX_CHANNEL_NUM 8
83 #define MIN_CHANNEL_NUM 2
85 /* SYSCON Registers */
86 #define I2SRX_3CH_ADC_MASK 0x2
87 #define I2SRX_3CH_ADC_EN BIT(1)
88 #define AUDIO_SDIN_MUX_MASK 0x3FC00
89 #define I2SRX_DATA_SRC_PDM (0x91 << 10)
91 union dw_i2s_snd_dma_data {
92 struct i2s_dma_data pd;
93 struct snd_dmaengine_dai_dma_data dt;
97 void __iomem *i2s_base;
98 struct regmap *syscon_base;
100 unsigned int capability;
102 unsigned int i2s_reg_comp1;
103 unsigned int i2s_reg_comp2;
108 u32 syscon_offset_18;
109 u32 syscon_offset_34;
111 struct clk *clk_apb0;
112 struct clk *clk_i2s_apb;
113 struct clk *clk_i2s_bclk_mst;
114 struct clk *clk_i2s_lrck_mst;
115 struct clk *clk_i2s_bclk;
116 struct clk *clk_i2s_lrck;
117 struct clk *clk_mclk;
118 struct clk *clk_mclk_ext;
119 struct clk *clk_mclk_inner;
120 struct reset_control *rst_i2s_apb;
121 struct reset_control *rst_i2s_bclk;
123 /* data related to DMA transfers b/w i2s and DMAC */
124 union dw_i2s_snd_dma_data play_dma_data;
125 union dw_i2s_snd_dma_data capture_dma_data;
126 struct i2s_clk_config_data config;
127 int (*i2s_clk_cfg)(struct i2s_clk_config_data *config);
129 /* data related to PIO transfers */
131 struct snd_pcm_substream __rcu *tx_substream;
132 struct snd_pcm_substream __rcu *rx_substream;
133 unsigned int (*tx_fn)(struct dw_i2s_dev *dev,
134 struct snd_pcm_runtime *runtime, unsigned int tx_ptr,
135 bool *period_elapsed);
136 unsigned int (*rx_fn)(struct dw_i2s_dev *dev,
137 struct snd_pcm_runtime *runtime, unsigned int rx_ptr,
138 bool *period_elapsed);
143 #if IS_ENABLED(CONFIG_SND_DESIGNWARE_PCM)
144 void dw_pcm_push_tx(struct dw_i2s_dev *dev);
145 void dw_pcm_pop_rx(struct dw_i2s_dev *dev);
146 int dw_pcm_register(struct platform_device *pdev);
148 static inline void dw_pcm_push_tx(struct dw_i2s_dev *dev) { }
149 static inline void dw_pcm_pop_rx(struct dw_i2s_dev *dev) { }
150 static inline int dw_pcm_register(struct platform_device *pdev)