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 	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