1 /* 2 * Copyright (ST) 2012 Rajeev Kumar (rajeevkumar.linux@gmail.com) 3 * 4 * This program is free software; you can redistribute it and/or modify 5 * it under the terms of the GNU General Public License as published by 6 * the Free Software Foundation; either version 2 of the License, or 7 * (at your option) any later version. 8 * 9 * This program is distributed in the hope that it will be useful, 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 * GNU General Public License for more details. 13 * 14 * You should have received a copy of the GNU General Public License 15 * along with this program; if not, write to the Free Software 16 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 17 * 18 */ 19 20 #ifndef __SOUND_DESIGNWARE_I2S_H 21 #define __SOUND_DESIGNWARE_I2S_H 22 23 #include <linux/dmaengine.h> 24 #include <linux/types.h> 25 26 /* 27 * struct i2s_clk_config_data - represent i2s clk configuration data 28 * @chan_nr: number of channel 29 * @data_width: number of bits per sample (8/16/24/32 bit) 30 * @sample_rate: sampling frequency (8Khz, 16Khz, 32Khz, 44Khz, 48Khz) 31 */ 32 struct i2s_clk_config_data { 33 int chan_nr; 34 u32 data_width; 35 u32 sample_rate; 36 }; 37 38 struct i2s_platform_data { 39 #define DWC_I2S_PLAY (1 << 0) 40 #define DWC_I2S_RECORD (1 << 1) 41 #define DW_I2S_SLAVE (1 << 2) 42 #define DW_I2S_MASTER (1 << 3) 43 unsigned int cap; 44 int channel; 45 u32 snd_fmts; 46 u32 snd_rates; 47 48 #define DW_I2S_QUIRK_COMP_REG_OFFSET (1 << 0) 49 #define DW_I2S_QUIRK_COMP_PARAM1 (1 << 1) 50 #define DW_I2S_QUIRK_16BIT_IDX_OVERRIDE (1 << 2) 51 unsigned int quirks; 52 unsigned int i2s_reg_comp1; 53 unsigned int i2s_reg_comp2; 54 55 void *play_dma_data; 56 void *capture_dma_data; 57 bool (*filter)(struct dma_chan *chan, void *slave); 58 int (*i2s_clk_cfg)(struct i2s_clk_config_data *config); 59 }; 60 61 struct i2s_dma_data { 62 void *data; 63 dma_addr_t addr; 64 u32 max_burst; 65 enum dma_slave_buswidth addr_width; 66 bool (*filter)(struct dma_chan *chan, void *slave); 67 }; 68 69 /* I2S DMA registers */ 70 #define I2S_RXDMA 0x01C0 71 #define I2S_TXDMA 0x01C8 72 73 #define TWO_CHANNEL_SUPPORT 2 /* up to 2.0 */ 74 #define FOUR_CHANNEL_SUPPORT 4 /* up to 3.1 */ 75 #define SIX_CHANNEL_SUPPORT 6 /* up to 5.1 */ 76 #define EIGHT_CHANNEL_SUPPORT 8 /* up to 7.1 */ 77 78 #endif /* __SOUND_DESIGNWARE_I2S_H */ 79