path: root/sound/oss/dmasound/tas3004.c

/*
 * Driver for the i2c/i2s based TA3004 sound chip used
 * on some Apple hardware. Also known as "snapper".
 *
 * Tobias Sargeant <tobias.sargeant@bigpond.com>
 * Based upon tas3001c.c by Christopher C. Chimelis <chris@debian.org>:
 *
 * Input support by Renzo Davoli <renzo@cs.unibo.it>
 *
 */

#include <linux/module.h>
#include <linux/slab.h>
#include <linux/proc_fs.h>
#include <linux/ioport.h>
#include <linux/sysctl.h>
#include <linux/types.h>
#include <linux/i2c.h>
#include <linux/init.h>
#include <linux/soundcard.h>
#include <linux/interrupt.h>
#include <linux/workqueue.h>

#include <asm/uaccess.h>
#include <asm/errno.h>
#include <asm/io.h>
#include <asm/prom.h>

#include "dmasound.h"
#include "tas_common.h"
#include "tas3004.h"

#include "tas_ioctl.h"

/* #define DEBUG_DRCE */

#define TAS3004_BIQUAD_FILTER_COUNT  7
#define TAS3004_BIQUAD_CHANNEL_COUNT 2

#define VOL_DEFAULT	(100 * 4 / 5)
#define INPUT_DEFAULT	(100 * 4 / 5)
#define BASS_DEFAULT	(100 / 2)
#define TREBLE_DEFAULT	(100 / 2)

struct tas3004_data_t {
	struct tas_data_t super;
	int device_id;
	int output_id;
	int speaker_id;
	struct tas_drce_t drce_state;
};

#define MAKE_TIME(sec,usec) (((sec)<<12) + (50000+(usec/10)*(1<<12))/100000)

#define MAKE_RATIO(i,f) (((i)<<8) + ((500+(f)*(1<<8))/1000))


static const union tas_biquad_t tas3004_eq_unity = {
	.buf		 = { 0x100000, 0x000000, 0x000000, 0x000000, 0x000000 },
};


static const struct tas_drce_t tas3004_drce_min = {
	.enable		= 1,
	.above		= { .val = MAKE_RATIO(16,0), .expand = 0 },
	.below		= { .val = MAKE_RATIO(2,0), .expand = 0 },
	.threshold	= -0x59a0,
	.energy		= MAKE_TIME(0,  1700),
	.attack		= MAKE_TIME(0,  1700),
	.decay		= MAKE_TIME(0,  1700),
};


static const struct tas_drce_t tas3004_drce_max = {
	.enable		= 1,
	.above		= { .val = MAKE_RATIO(1,500), .expand = 1 },
	.below		= { .val = MAKE_RATIO(2,0), .expand = 1 },
	.threshold	= -0x0,
	.energy		= MAKE_TIME(2,400000),
	.attack		= MAKE_TIME(2,400000),
	.decay		= MAKE_TIME(2,400000),
};


static const unsigned short time_constants[]={
	MAKE_TIME(0,  1700),
	MAKE_TIME(0,  3500),
	MAKE_TIME(0,  6700),
	MAKE_TIME(0, 13000),
	MAKE_TIME(0, 26000),
	MAKE_TIME(0, 53000),
	MAKE_TIME(0,106000),
	MAKE_TIME(0,212000),
	MAKE_TIME(0,425000),
	MAKE_TIME(0,850000),
	MAKE_TIME(1,700000),
	MAKE_TIME(2,400000),
};

static const unsigned short above_threshold_compression_ratio[]={
	MAKE_RATIO( 1, 70),
	MAKE_RATIO( 1,140),
	MAKE_RATIO( 1,230),
	MAKE_RATIO( 1,330),
	MAKE_RATIO( 1,450),
	MAKE_RATIO( 1,600),
	MAKE_RATIO( 1,780),
	MAKE_RATIO( 2,  0),
	MAKE_RATIO( 2,290),
	MAKE_RATIO( 2,670),
	MAKE_RATIO( 3,200),
	MAKE_RATIO( 4,  0),
	MAKE_RATIO( 5,330),
	MAKE_RATIO( 8,  0),
	MAKE_RATIO(16,  0),
};

static const unsigned short above_thr