path: root/sound/i2c/l3/uda1341.c

/*
 * Philips UDA1341 mixer device driver
 * Copyright (c) 2002 Tomas Kasparek <tomas.kasparek@seznam.cz>
 *
 * Portions are Copyright (C) 2000 Lernout & Hauspie Speech Products, N.V.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License.
 *
 * History:
 *
 * 2002-03-13   Tomas Kasparek  initial release - based on uda1341.c from OSS
 * 2002-03-28   Tomas Kasparek  basic mixer is working (volume, bass, treble)
 * 2002-03-30   Tomas Kasparek  proc filesystem support, complete mixer and DSP
 *                              features support
 * 2002-04-12	Tomas Kasparek	proc interface update, code cleanup
 * 2002-05-12   Tomas Kasparek  another code cleanup
 */

/* $Id: uda1341.c,v 1.18 2005/11/17 14:17:21 tiwai Exp $ */

#include <sound/driver.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/types.h>
#include <linux/slab.h>
#include <linux/errno.h>
#include <linux/ioctl.h>

#include <asm/uaccess.h>

#include <sound/core.h>
#include <sound/control.h>
#include <sound/initval.h>
#include <sound/info.h>

#include <linux/l3/l3.h>

#include <sound/uda1341.h>

/* {{{ HW regs definition */

#define STAT0                   0x00
#define STAT1			0x80
#define STAT_MASK               0x80

#define DATA0_0			0x00
#define DATA0_1			0x40
#define DATA0_2			0x80
#define DATA_MASK               0xc0

#define IS_DATA0(x)     ((x) >= data0_0 && (x) <= data0_2)
#define IS_DATA1(x)     ((x) == data1)
#define IS_STATUS(x)    ((x) == stat0 || (x) == stat1)
#define IS_EXTEND(x)   ((x) >= ext0 && (x) <= ext6)

/* }}} */


static const char *peak_names[] = {
	"before",
	"after",
};

static const char *filter_names[] = {
	"flat",
	"min",
	"min",
	"max",
};

static const char *mixer_names[] = {
	"double differential",
	"input channel 1 (line in)",
	"input channel 2 (microphone)",
	"digital mixer",
};

static const char *deemp_names[] = {
	"none",
	"32 kHz",
	"44.1 kHz",
	"48 kHz",        
};

enum uda1341_regs_names {
	stat0,
	stat1,
	data0_0,
	data0_1,
	data0_2,
	data1,
	ext0,
	ext1,
	ext2,
	empty,
	ext4,
	ext5,
	ext6,
	uda1341_reg_last,
};

static const char *uda1341_reg_names[] = {
	"stat 0 ",
	"stat 1 ",
	"data 00",
	"data 01",
	"data 02",
	"data 1 ",
	"ext 0",
	"ext 1",
	"ext 2",
	"empty",
	"ext 4",
	"ext 5",
	"ext 6",
};

static const int uda1341_enum_items[] = {
	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
	2, //peak - before/after
	4, //deemp - none/32/44.1/48
	0,
	4, //filter - flat/min/min/max
	0, 0, 0,
	4, //mixer - differ/line/mic/mixer
	0, 0, 0, 0, 0,
};

static const char ** uda1341_enum_names[] = {
	NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
	peak_names, //peak - before/after
	deemp_names, //deemp - none/32/44.1/48
	NULL,
	filter_names, //filter - flat/min/min/max
	NULL, NULL, NULL,
	mixer_names, //mixer - differ/line/mic/mixer
	NULL, NULL, NULL, NULL, NULL,
};

typedef int uda1341_cfg[CMD_LAST];

struct uda1341 {
	int (*write) (struct l3_client *uda1341, unsigned short reg, unsigned short val);
	int (*read) (struct l3_client *uda1341, unsigned short reg);        
	unsigned char regs[uda1341_reg_last];
	int active;
	spinlock_t reg_lock;
	struct snd_card *card;
	uda1341_cfg cfg;
#ifdef CONFIG_PM
	unsigned char suspend_regs[uda1341_reg_last];
	uda1341_cfg suspend_cfg;
#endif
};

/* transfer 8bit integer into string with binary representation */
static void int2str_bin8(uint8_t val, char *buf)
{
	const int size = sizeof(val) * 8;
	int i;

	for (i= 0; i < size; i++){
		*(buf++) = (val >> (size - 1)) ? '1' : '0';
		val <<= 1;
	}
	*buf = '\0'; //end the string with zero
}

/* {{{ HW manipulation routines */

static int snd_uda1341_codec_write(struct l3_client *clnt, unsigned short reg, unsigned short val)
{
	struct uda1341 *uda = clnt->driver_data;
	unsigned char buf[2] = { 0xc0, 0xe0 }; // for EXT addressing
	int err = 0;

	uda->regs[reg] = val;

	if (uda->active) {
		if (IS_DATA0(reg)) {
			err = l3_write(clnt, UDA1341_DATA0, (const unsigned char *)&val, 1);
		} else if (IS_DATA1(reg)) {
			err = l3_write(clnt, UDA1341_DATA1, (const unsigned char *)&val, 1);
		} else if (IS_STATUS(reg)) {
			err = l3_write(clnt, UDA1341_S