ASoC: cygnus: Add Cygnus audio DAI driver

/*

 * Copyright (C) 2014-2015 Broadcom Corporation

 *

 * This program is free software; you can redistribute it and/or

 * modify it under the terms of the GNU General Public License as

 * published by the Free Software Foundation version 2.

 *

 * This program is distributed "as is" WITHOUT ANY WARRANTY of any

 * kind, whether express or implied; without even the implied warranty

 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 */

#ifndef __CYGNUS_SSP_H__

#define __CYGNUS_SSP_H__

#define CYGNUS_TDM_DAI_MAX_SLOTS 16

#define CYGNUS_MAX_PLAYBACK_PORTS 4

#define CYGNUS_MAX_CAPTURE_PORTS 3

#define CYGNUS_MAX_I2S_PORTS 3

#define CYGNUS_MAX_PORTS  CYGNUS_MAX_PLAYBACK_PORTS

#define CYGNUS_AUIDO_MAX_NUM_CLKS 3

#define CYGNUS_SSP_FRAMEBITS_DIV 1

#define CYGNUS_SSPMODE_I2S 0

#define CYGNUS_SSPMODE_TDM 1

#define CYGNUS_SSPMODE_UNKNOWN -1

#define CYGNUS_SSP_CLKSRC_PLL      0

/* Max string length of our dt property names */

#define PROP_LEN_MAX 40

struct ringbuf_regs {

	unsigned rdaddr;

	unsigned wraddr;

	unsigned baseaddr;

	unsigned endaddr;

	unsigned fmark;   /* freemark for play, fullmark for caputure */

	unsigned period_bytes;

	unsigned buf_size;

};

#define RINGBUF_REG_PLAYBACK(num) ((struct ringbuf_regs) { \

	.rdaddr = SRC_RBUF_ ##num## _RDADDR_OFFSET, \

	.wraddr = SRC_RBUF_ ##num## _WRADDR_OFFSET, \

	.baseaddr = SRC_RBUF_ ##num## _BASEADDR_OFFSET, \

	.endaddr = SRC_RBUF_ ##num## _ENDADDR_OFFSET, \

	.fmark = SRC_RBUF_ ##num## _FREE_MARK_OFFSET, \

	.period_bytes = 0, \

	.buf_size = 0, \

})

#define RINGBUF_REG_CAPTURE(num) ((struct ringbuf_regs)  { \

	.rdaddr = DST_RBUF_ ##num## _RDADDR_OFFSET, \

	.wraddr = DST_RBUF_ ##num## _WRADDR_OFFSET, \

	.baseaddr = DST_RBUF_ ##num## _BASEADDR_OFFSET, \

	.endaddr = DST_RBUF_ ##num## _ENDADDR_OFFSET, \

	.fmark = DST_RBUF_ ##num## _FULL_MARK_OFFSET, \

	.period_bytes = 0, \

	.buf_size = 0, \

})

enum cygnus_audio_port_type {

	PORT_TDM,

	PORT_SPDIF,

};

struct cygnus_ssp_regs {

	u32 i2s_stream_cfg;

	u32 i2s_cfg;

	u32 i2s_cap_stream_cfg;

	u32 i2s_cap_cfg;

	u32 i2s_mclk_cfg;

	u32 bf_destch_ctrl;

	u32 bf_destch_cfg;

	u32 bf_sourcech_ctrl;

	u32 bf_sourcech_cfg;

	u32 bf_sourcech_grp;

};

struct cygnus_track_clk {

	bool cap_en;

	bool play_en;

	bool cap_clk_en;

	bool play_clk_en;

};

struct cygnus_aio_port {

	int portnum;

	int mode;

	bool is_slave;

	int streams_on;   /* will be 0 if both capture and play are off */

	int fsync_width;

	int port_type;

	u32 mclk;

	u32 lrclk;

	u32 bit_per_frame;

	u32 pll_clk_num;

	struct cygnus_audio *cygaud;

	struct cygnus_ssp_regs regs;

	struct ringbuf_regs play_rb_regs;

	struct ringbuf_regs capture_rb_regs;

	struct snd_pcm_substream *play_stream;

	struct snd_pcm_substream *capture_stream;

	struct cygnus_track_clk clk_trace;

};

struct cygnus_audio {

	struct cygnus_aio_port  portinfo[CYGNUS_MAX_PORTS];

	int irq_num;

	void __iomem *audio;

	struct device *dev;

	void __iomem *i2s_in;

	struct clk *audio_clk[CYGNUS_AUIDO_MAX_NUM_CLKS];

	int active_ports;

	unsigned long vco_rate;

};

extern int cygnus_ssp_get_mode(struct snd_soc_dai *cpu_dai);

extern int cygnus_ssp_add_pll_tweak_controls(struct snd_soc_pcm_runtime *rtd);

extern int cygnus_ssp_set_custom_fsync_width(struct snd_soc_dai *cpu_dai,

						int len);

extern int cygnus_soc_platform_register(struct device *dev,

					struct cygnus_audio *cygaud);

extern int cygnus_soc_platform_unregister(struct device *dev);

extern int cygnus_ssp_set_custom_fsync_width(struct snd_soc_dai *cpu_dai,

	int len);

#endif