sound/aoa/soundbus/i2sbus/interface.h - arm/linux - Git at Google

 /*
  * i2sbus driver -- interface register definitions
  *
  * Copyright 2006 Johannes Berg <johannes@sipsolutions.net>
  *
  * GPL v2, can be found in COPYING.
  */
 #ifndef __I2SBUS_INTERFACE_H
 #define __I2SBUS_INTERFACE_H

 /* i2s bus control registers, at least what we know about them */

 #define __PAD(m,n) u8 __pad##m[n]
 #define _PAD(line, n) __PAD(line, n)
 #define PAD(n) _PAD(__LINE__, (n))
 struct i2s_interface_regs {
 	__le32 intr_ctl;	/* 0x00 */
 	PAD(12);
 	__le32 serial_format;	/* 0x10 */
 	PAD(12);
 	__le32 codec_msg_out;	/* 0x20 */
 	PAD(12);
 	__le32 codec_msg_in;	/* 0x30 */
 	PAD(12);
 	__le32 frame_count;	/* 0x40 */
 	PAD(12);
 	__le32 frame_match;	/* 0x50 */
 	PAD(12);
 	__le32 data_word_sizes;	/* 0x60 */
 	PAD(12);
 	__le32 peak_level_sel;	/* 0x70 */
 	PAD(12);
 	__le32 peak_level_in0;	/* 0x80 */
 	PAD(12);
 	__le32 peak_level_in1;	/* 0x90 */
 	PAD(12);
 	/* total size: 0x100 bytes */
 }  __attribute__((__packed__));

 /* interrupt register is just a bitfield with
  * interrupt enable and pending bits */
 #define I2S_REG_INTR_CTL		0x00
 #	define I2S_INT_FRAME_COUNT		(1<<31)
 #	define I2S_PENDING_FRAME_COUNT		(1<<30)
 #	define I2S_INT_MESSAGE_FLAG		(1<<29)
 #	define I2S_PENDING_MESSAGE_FLAG		(1<<28)
 #	define I2S_INT_NEW_PEAK			(1<<27)
 #	define I2S_PENDING_NEW_PEAK		(1<<26)
 #	define I2S_INT_CLOCKS_STOPPED		(1<<25)
 #	define I2S_PENDING_CLOCKS_STOPPED	(1<<24)
 #	define I2S_INT_EXTERNAL_SYNC_ERROR	(1<<23)
 #	define I2S_PENDING_EXTERNAL_SYNC_ERROR	(1<<22)
 #	define I2S_INT_EXTERNAL_SYNC_OK		(1<<21)
 #	define I2S_PENDING_EXTERNAL_SYNC_OK	(1<<20)
 #	define I2S_INT_NEW_SAMPLE_RATE		(1<<19)
 #	define I2S_PENDING_NEW_SAMPLE_RATE	(1<<18)
 #	define I2S_INT_STATUS_FLAG		(1<<17)
 #	define I2S_PENDING_STATUS_FLAG		(1<<16)

 /* serial format register is more interesting :)
  * It contains:
  *  - clock source
  *  - MClk divisor
  *  - SClk divisor
  *  - SClk master flag
  *  - serial format (sony, i2s 64x, i2s 32x, dav, silabs)
  *  - external sample frequency interrupt (don't understand)
  *  - external sample frequency
  */
 #define I2S_REG_SERIAL_FORMAT		0x10
 /* clock source. You get either 18.432, 45.1584 or 49.1520 MHz */
 #	define I2S_SF_CLOCK_SOURCE_SHIFT	30
 #	define I2S_SF_CLOCK_SOURCE_MASK		(3<<I2S_SF_CLOCK_SOURCE_SHIFT)
 #	define I2S_SF_CLOCK_SOURCE_18MHz	(0<<I2S_SF_CLOCK_SOURCE_SHIFT)
 #	define I2S_SF_CLOCK_SOURCE_45MHz	(1<<I2S_SF_CLOCK_SOURCE_SHIFT)
 #	define I2S_SF_CLOCK_SOURCE_49MHz	(2<<I2S_SF_CLOCK_SOURCE_SHIFT)
 /* also, let's define the exact clock speeds here, in Hz */
 #define I2S_CLOCK_SPEED_18MHz	18432000
 #define I2S_CLOCK_SPEED_45MHz	45158400
 #define I2S_CLOCK_SPEED_49MHz	49152000
 /* MClk is the clock that drives the codec, usually called its 'system clock'.
  * It is derived by taking only every 'divisor' tick of the clock.
  */
 #	define I2S_SF_MCLKDIV_SHIFT		24
 #	define I2S_SF_MCLKDIV_MASK		(0x1F<<I2S_SF_MCLKDIV_SHIFT)
 #	define I2S_SF_MCLKDIV_1			(0x14<<I2S_SF_MCLKDIV_SHIFT)
 #	define I2S_SF_MCLKDIV_3			(0x13<<I2S_SF_MCLKDIV_SHIFT)
 #	define I2S_SF_MCLKDIV_5			(0x12<<I2S_SF_MCLKDIV_SHIFT)
 #	define I2S_SF_MCLKDIV_14		(0x0E<<I2S_SF_MCLKDIV_SHIFT)
 #	define I2S_SF_MCLKDIV_OTHER(div)	(((div/2-1)<<I2S_SF_MCLKDIV_SHIFT)&I2S_SF_MCLKDIV_MASK)
 static inline int i2s_sf_mclkdiv(int div, int *out)
 {
 	int d;

 	switch(div) {
 	case 1: *out |= I2S_SF_MCLKDIV_1; return 0;
 	case 3: *out |= I2S_SF_MCLKDIV_3; return 0;
 	case 5: *out |= I2S_SF_MCLKDIV_5; return 0;
 	case 14: *out |= I2S_SF_MCLKDIV_14; return 0;
 	default:
 		if (div%2) return -1;
 		d = div/2-1;
 		if (d == 0x14 || d == 0x13 || d == 0x12 || d == 0x0E)
 			return -1;
 		*out |= I2S_SF_MCLKDIV_OTHER(div);
 		return 0;
 	}
 }
 /* SClk is the clock that drives the i2s wire bus. Note that it is
  * derived from the MClk above by taking only every 'divisor' tick
  * of MClk.
  */
 #	define I2S_SF_SCLKDIV_SHIFT		20
 #	define I2S_SF_SCLKDIV_MASK		(0xF<<I2S_SF_SCLKDIV_SHIFT)
 #	define I2S_SF_SCLKDIV_1			(8<<I2S_SF_SCLKDIV_SHIFT)
 #	define I2S_SF_SCLKDIV_3			(9<<I2S_SF_SCLKDIV_SHIFT)
 #	define I2S_SF_SCLKDIV_OTHER(div)	(((div/2-1)<<I2S_SF_SCLKDIV_SHIFT)&I2S_SF_SCLKDIV_MASK)
 static inline int i2s_sf_sclkdiv(int div, int *out)
 {
 	int d;

 	switch(div) {
 	case 1: *out |= I2S_SF_SCLKDIV_1; return 0;
 	case 3: *out |= I2S_SF_SCLKDIV_3; return 0;
 	default:
 		if (div%2) return -1;
 		d = div/2-1;
 		if (d == 8 || d == 9) return -1;
 		*out |= I2S_SF_SCLKDIV_OTHER(div);
 		return 0;
 	}
 }
 #	define I2S_SF_SCLK_MASTER		(1<<19)
 /* serial format is the way the data is put to the i2s wire bus */
 #	define I2S_SF_SERIAL_FORMAT_SHIFT	16
 #	define I2S_SF_SERIAL_FORMAT_MASK	(7<<I2S_SF_SERIAL_FORMAT_SHIFT)
 #	define I2S_SF_SERIAL_FORMAT_SONY	(0<<I2S_SF_SERIAL_FORMAT_SHIFT)
 #	define I2S_SF_SERIAL_FORMAT_I2S_64X	(1<<I2S_SF_SERIAL_FORMAT_SHIFT)
 #	define I2S_SF_SERIAL_FORMAT_I2S_32X	(2<<I2S_SF_SERIAL_FORMAT_SHIFT)
 #	define I2S_SF_SERIAL_FORMAT_I2S_DAV	(4<<I2S_SF_SERIAL_FORMAT_SHIFT)
 #	define I2S_SF_SERIAL_FORMAT_I2S_SILABS	(5<<I2S_SF_SERIAL_FORMAT_SHIFT)
 /* unknown */
 #	define I2S_SF_EXT_SAMPLE_FREQ_INT_SHIFT	12
 #	define I2S_SF_EXT_SAMPLE_FREQ_INT_MASK	(0xF<<I2S_SF_SAMPLE_FREQ_INT_SHIFT)
 /* probably gives external frequency? */
 #	define I2S_SF_EXT_SAMPLE_FREQ_MASK	0xFFF

 /* used to send codec messages, but how isn't clear */
 #define I2S_REG_CODEC_MSG_OUT		0x20

 /* used to receive codec messages, but how isn't clear */
 #define I2S_REG_CODEC_MSG_IN		0x30

 /* frame count reg isn't clear to me yet, but probably useful */
 #define I2S_REG_FRAME_COUNT		0x40

 /* program to some value, and get interrupt if frame count reaches it */
 #define I2S_REG_FRAME_MATCH		0x50

 /* this register describes how the bus transfers data */
 #define I2S_REG_DATA_WORD_SIZES		0x60
 /* number of interleaved input channels */
 #	define I2S_DWS_NUM_CHANNELS_IN_SHIFT	24
 #	define I2S_DWS_NUM_CHANNELS_IN_MASK	(0x1F<<I2S_DWS_NUM_CHANNELS_IN_SHIFT)
 /* word size of input data */
 #	define I2S_DWS_DATA_IN_SIZE_SHIFT	16
 #	define I2S_DWS_DATA_IN_16BIT		(0<<I2S_DWS_DATA_IN_SIZE_SHIFT)
 #	define I2S_DWS_DATA_IN_24BIT		(3<<I2S_DWS_DATA_IN_SIZE_SHIFT)
 /* number of interleaved output channels */
 #	define I2S_DWS_NUM_CHANNELS_OUT_SHIFT	8
 #	define I2S_DWS_NUM_CHANNELS_OUT_MASK	(0x1F<<I2S_DWS_NUM_CHANNELS_OUT_SHIFT)
 /* word size of output data */
 #	define I2S_DWS_DATA_OUT_SIZE_SHIFT	0
 #	define I2S_DWS_DATA_OUT_16BIT		(0<<I2S_DWS_DATA_OUT_SIZE_SHIFT)
 #	define I2S_DWS_DATA_OUT_24BIT		(3<<I2S_DWS_DATA_OUT_SIZE_SHIFT)


 /* unknown */
 #define I2S_REG_PEAK_LEVEL_SEL		0x70

 /* unknown */
 #define I2S_REG_PEAK_LEVEL_IN0		0x80

 /* unknown */
 #define I2S_REG_PEAK_LEVEL_IN1		0x90

 #endif /* __I2SBUS_INTERFACE_H */
	/*
	* i2sbus driver -- interface register definitions
	*
	* Copyright 2006 Johannes Berg <johannes@sipsolutions.net>
	*
	* GPL v2, can be found in COPYING.
	*/
	#ifndef __I2SBUS_INTERFACE_H
	#define __I2SBUS_INTERFACE_H

	/* i2s bus control registers, at least what we know about them */

	#define __PAD(m,n) u8 __pad##m[n]
	#define _PAD(line, n) __PAD(line, n)
	#define PAD(n) _PAD(__LINE__, (n))
	struct i2s_interface_regs {
	__le32 intr_ctl; /* 0x00 */
	PAD(12);
	__le32 serial_format; /* 0x10 */
	PAD(12);
	__le32 codec_msg_out; /* 0x20 */
	PAD(12);
	__le32 codec_msg_in; /* 0x30 */
	PAD(12);
	__le32 frame_count; /* 0x40 */
	PAD(12);
	__le32 frame_match; /* 0x50 */
	PAD(12);
	__le32 data_word_sizes; /* 0x60 */
	PAD(12);
	__le32 peak_level_sel; /* 0x70 */
	PAD(12);
	__le32 peak_level_in0; /* 0x80 */
	PAD(12);
	__le32 peak_level_in1; /* 0x90 */
	PAD(12);
	/* total size: 0x100 bytes */
	} __attribute__((__packed__));

	/* interrupt register is just a bitfield with
	* interrupt enable and pending bits */
	#define I2S_REG_INTR_CTL 0x00
	# define I2S_INT_FRAME_COUNT (1<<31)
	# define I2S_PENDING_FRAME_COUNT (1<<30)
	# define I2S_INT_MESSAGE_FLAG (1<<29)
	# define I2S_PENDING_MESSAGE_FLAG (1<<28)
	# define I2S_INT_NEW_PEAK (1<<27)
	# define I2S_PENDING_NEW_PEAK (1<<26)
	# define I2S_INT_CLOCKS_STOPPED (1<<25)
	# define I2S_PENDING_CLOCKS_STOPPED (1<<24)
	# define I2S_INT_EXTERNAL_SYNC_ERROR (1<<23)
	# define I2S_PENDING_EXTERNAL_SYNC_ERROR (1<<22)
	# define I2S_INT_EXTERNAL_SYNC_OK (1<<21)
	# define I2S_PENDING_EXTERNAL_SYNC_OK (1<<20)
	# define I2S_INT_NEW_SAMPLE_RATE (1<<19)
	# define I2S_PENDING_NEW_SAMPLE_RATE (1<<18)
	# define I2S_INT_STATUS_FLAG (1<<17)
	# define I2S_PENDING_STATUS_FLAG (1<<16)

	/* serial format register is more interesting :)
	* It contains:
	* - clock source
	* - MClk divisor
	* - SClk divisor
	* - SClk master flag
	* - serial format (sony, i2s 64x, i2s 32x, dav, silabs)
	* - external sample frequency interrupt (don't understand)
	* - external sample frequency
	*/
	#define I2S_REG_SERIAL_FORMAT 0x10
	/* clock source. You get either 18.432, 45.1584 or 49.1520 MHz */
	# define I2S_SF_CLOCK_SOURCE_SHIFT 30
	# define I2S_SF_CLOCK_SOURCE_MASK (3<<I2S_SF_CLOCK_SOURCE_SHIFT)
	# define I2S_SF_CLOCK_SOURCE_18MHz (0<<I2S_SF_CLOCK_SOURCE_SHIFT)
	# define I2S_SF_CLOCK_SOURCE_45MHz (1<<I2S_SF_CLOCK_SOURCE_SHIFT)
	# define I2S_SF_CLOCK_SOURCE_49MHz (2<<I2S_SF_CLOCK_SOURCE_SHIFT)
	/* also, let's define the exact clock speeds here, in Hz */
	#define I2S_CLOCK_SPEED_18MHz 18432000
	#define I2S_CLOCK_SPEED_45MHz 45158400
	#define I2S_CLOCK_SPEED_49MHz 49152000
	/* MClk is the clock that drives the codec, usually called its 'system clock'.
	* It is derived by taking only every 'divisor' tick of the clock.
	*/
	# define I2S_SF_MCLKDIV_SHIFT 24
	# define I2S_SF_MCLKDIV_MASK (0x1F<<I2S_SF_MCLKDIV_SHIFT)
	# define I2S_SF_MCLKDIV_1 (0x14<<I2S_SF_MCLKDIV_SHIFT)
	# define I2S_SF_MCLKDIV_3 (0x13<<I2S_SF_MCLKDIV_SHIFT)
	# define I2S_SF_MCLKDIV_5 (0x12<<I2S_SF_MCLKDIV_SHIFT)
	# define I2S_SF_MCLKDIV_14 (0x0E<<I2S_SF_MCLKDIV_SHIFT)
	# define I2S_SF_MCLKDIV_OTHER(div) (((div/2-1)<<I2S_SF_MCLKDIV_SHIFT)&I2S_SF_MCLKDIV_MASK)
	static inline int i2s_sf_mclkdiv(int div, int *out)
	{
	int d;

	switch(div) {
	case 1: *out \|= I2S_SF_MCLKDIV_1; return 0;
	case 3: *out \|= I2S_SF_MCLKDIV_3; return 0;
	case 5: *out \|= I2S_SF_MCLKDIV_5; return 0;
	case 14: *out \|= I2S_SF_MCLKDIV_14; return 0;
	default:
	if (div%2) return -1;
	d = div/2-1;
	if (d == 0x14 \|\| d == 0x13 \|\| d == 0x12 \|\| d == 0x0E)
	return -1;
	*out \|= I2S_SF_MCLKDIV_OTHER(div);
	return 0;
	}
	}
	/* SClk is the clock that drives the i2s wire bus. Note that it is
	* derived from the MClk above by taking only every 'divisor' tick
	* of MClk.
	*/
	# define I2S_SF_SCLKDIV_SHIFT 20
	# define I2S_SF_SCLKDIV_MASK (0xF<<I2S_SF_SCLKDIV_SHIFT)
	# define I2S_SF_SCLKDIV_1 (8<<I2S_SF_SCLKDIV_SHIFT)
	# define I2S_SF_SCLKDIV_3 (9<<I2S_SF_SCLKDIV_SHIFT)
	# define I2S_SF_SCLKDIV_OTHER(div) (((div/2-1)<<I2S_SF_SCLKDIV_SHIFT)&I2S_SF_SCLKDIV_MASK)
	static inline int i2s_sf_sclkdiv(int div, int *out)
	{
	int d;

	switch(div) {
	case 1: *out \|= I2S_SF_SCLKDIV_1; return 0;
	case 3: *out \|= I2S_SF_SCLKDIV_3; return 0;
	default:
	if (div%2) return -1;
	d = div/2-1;
	if (d == 8 \|\| d == 9) return -1;
	*out \|= I2S_SF_SCLKDIV_OTHER(div);
	return 0;
	}
	}
	# define I2S_SF_SCLK_MASTER (1<<19)
	/* serial format is the way the data is put to the i2s wire bus */
	# define I2S_SF_SERIAL_FORMAT_SHIFT 16
	# define I2S_SF_SERIAL_FORMAT_MASK (7<<I2S_SF_SERIAL_FORMAT_SHIFT)
	# define I2S_SF_SERIAL_FORMAT_SONY (0<<I2S_SF_SERIAL_FORMAT_SHIFT)
	# define I2S_SF_SERIAL_FORMAT_I2S_64X (1<<I2S_SF_SERIAL_FORMAT_SHIFT)
	# define I2S_SF_SERIAL_FORMAT_I2S_32X (2<<I2S_SF_SERIAL_FORMAT_SHIFT)
	# define I2S_SF_SERIAL_FORMAT_I2S_DAV (4<<I2S_SF_SERIAL_FORMAT_SHIFT)
	# define I2S_SF_SERIAL_FORMAT_I2S_SILABS (5<<I2S_SF_SERIAL_FORMAT_SHIFT)
	/* unknown */
	# define I2S_SF_EXT_SAMPLE_FREQ_INT_SHIFT 12
	# define I2S_SF_EXT_SAMPLE_FREQ_INT_MASK (0xF<<I2S_SF_SAMPLE_FREQ_INT_SHIFT)
	/* probably gives external frequency? */
	# define I2S_SF_EXT_SAMPLE_FREQ_MASK 0xFFF

	/* used to send codec messages, but how isn't clear */
	#define I2S_REG_CODEC_MSG_OUT 0x20

	/* used to receive codec messages, but how isn't clear */
	#define I2S_REG_CODEC_MSG_IN 0x30

	/* frame count reg isn't clear to me yet, but probably useful */
	#define I2S_REG_FRAME_COUNT 0x40

	/* program to some value, and get interrupt if frame count reaches it */
	#define I2S_REG_FRAME_MATCH 0x50

	/* this register describes how the bus transfers data */
	#define I2S_REG_DATA_WORD_SIZES 0x60
	/* number of interleaved input channels */
	# define I2S_DWS_NUM_CHANNELS_IN_SHIFT 24
	# define I2S_DWS_NUM_CHANNELS_IN_MASK (0x1F<<I2S_DWS_NUM_CHANNELS_IN_SHIFT)
	/* word size of input data */
	# define I2S_DWS_DATA_IN_SIZE_SHIFT 16
	# define I2S_DWS_DATA_IN_16BIT (0<<I2S_DWS_DATA_IN_SIZE_SHIFT)
	# define I2S_DWS_DATA_IN_24BIT (3<<I2S_DWS_DATA_IN_SIZE_SHIFT)
	/* number of interleaved output channels */
	# define I2S_DWS_NUM_CHANNELS_OUT_SHIFT 8
	# define I2S_DWS_NUM_CHANNELS_OUT_MASK (0x1F<<I2S_DWS_NUM_CHANNELS_OUT_SHIFT)
	/* word size of output data */
	# define I2S_DWS_DATA_OUT_SIZE_SHIFT 0
	# define I2S_DWS_DATA_OUT_16BIT (0<<I2S_DWS_DATA_OUT_SIZE_SHIFT)
	# define I2S_DWS_DATA_OUT_24BIT (3<<I2S_DWS_DATA_OUT_SIZE_SHIFT)


	/* unknown */
	#define I2S_REG_PEAK_LEVEL_SEL 0x70

	/* unknown */
	#define I2S_REG_PEAK_LEVEL_IN0 0x80

	/* unknown */
	#define I2S_REG_PEAK_LEVEL_IN1 0x90

	#endif /* __I2SBUS_INTERFACE_H */