1 /* 2 * Copyright (ST) 2012 Rajeev Kumar (rajeev-dlh.kumar@st.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 unsigned int cap; 42 int channel; 43 u32 snd_fmts; 44 u32 snd_rates; 45 46 void *play_dma_data; 47 void *capture_dma_data; 48 bool (*filter)(struct dma_chan *chan, void *slave); 49 int (*i2s_clk_cfg)(struct i2s_clk_config_data *config); 50 }; 51 52 struct i2s_dma_data { 53 void *data; 54 dma_addr_t addr; 55 u32 max_burst; 56 enum dma_slave_buswidth addr_width; 57 bool (*filter)(struct dma_chan *chan, void *slave); 58 }; 59 60 /* I2S DMA registers */ 61 #define I2S_RXDMA 0x01C0 62 #define I2S_TXDMA 0x01C8 63 64 #define TWO_CHANNEL_SUPPORT 2 /* up to 2.0 */ 65 #define FOUR_CHANNEL_SUPPORT 4 /* up to 3.1 */ 66 #define SIX_CHANNEL_SUPPORT 6 /* up to 5.1 */ 67 #define EIGHT_CHANNEL_SUPPORT 8 /* up to 7.1 */ 68 69 #endif /* __SOUND_DESIGNWARE_I2S_H */ 70