Root/include/sound/designware_i2s.h

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 */
32struct i2s_clk_config_data {
33    int chan_nr;
34    u32 data_width;
35    u32 sample_rate;
36};
37
38struct 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
52struct 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

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