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 */