2 * Copyright (ST) 2012 Rajeev Kumar (rajeev-dlh.kumar@st.com)
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.
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.
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
20 #ifndef __SOUND_DESIGNWARE_I2S_H
21 #define __SOUND_DESIGNWARE_I2S_H
23 #include <linux/dmaengine.h>
24 #include <linux/types.h>
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)
32 struct i2s_clk_config_data {
38 struct i2s_platform_data {
39 #define DWC_I2S_PLAY (1 << 0)
40 #define DWC_I2S_RECORD (1 << 1)
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);
56 enum dma_slave_buswidth addr_width;
57 bool (*filter)(struct dma_chan *chan, void *slave);
60 /* I2S DMA registers */
61 #define I2S_RXDMA 0x01C0
62 #define I2S_TXDMA 0x01C8
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 */
69 #endif /* __SOUND_DESIGNWARE_I2S_H */