path: root/sound/isa/sb/emu8000.c

/*
 *  Copyright (c) by Jaroslav Kysela <perex@perex.cz>
 *     and (c) 1999 Steve Ratcliffe <steve@parabola.demon.co.uk>
 *  Copyright (C) 1999-2000 Takashi Iwai <tiwai@suse.de>
 *
 *  Routines for control of EMU8000 chip
 *
 *   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; either version 2 of the License, or
 *   (at your option) any later version.
 *
 *   This program is distributed in the hope that it will be useful,
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *   GNU General Public License for more details.
 *
 *   You should have received a copy of the GNU General Public License
 *   along with this program; if not, write to the Free Software
 *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
 */

#include <linux/wait.h>
#include <linux/sched.h>
#include <linux/slab.h>
#include <linux/ioport.h>
#include <linux/delay.h>
#include <sound/core.h>
#include <sound/emu8000.h>
#include <sound/emu8000_reg.h>
#include <asm/io.h>
#include <asm/uaccess.h>
#include <linux/init.h>
#include <sound/control.h>
#include <sound/initval.h>

/*
 * emu8000 register controls
 */

/*
 * The following routines read and write registers on the emu8000.  They
 * should always be called via the EMU8000*READ/WRITE macros and never
 * directly.  The macros handle the port number and command word.
 */
/* Write a word */
void snd_emu8000_poke(struct snd_emu8000 *emu, unsigned int port, unsigned int reg, unsigned int val)
{
	unsigned long flags;
	spin_lock_irqsave(&emu->reg_lock, flags);
	if (reg != emu->last_reg) {
		outw((unsigned short)reg, EMU8000_PTR(emu)); /* Set register */
		emu->last_reg = reg;
	}
	outw((unsigned short)val, port); /* Send data */
	spin_unlock_irqrestore(&emu->reg_lock, flags);
}

/* Read a word */
unsigned short snd_emu8000_peek(struct snd_emu8000 *emu, unsigned int port, unsigned int reg)
{
	unsigned short res;
	unsigned long flags;
	spin_lock_irqsave(&emu->reg_lock, flags);
	if (reg != emu->last_reg) {
		outw((unsigned short)reg, EMU8000_PTR(emu)); /* Set register */
		emu->last_reg = reg;
	}
	res = inw(port);	/* Read data */
	spin_unlock_irqrestore(&emu->reg_lock, flags);
	return res;
}

/* Write a double word */
void snd_emu8000_poke_dw(struct snd_emu8000 *emu, unsigned int port, unsigned int reg, unsigned int val)
{
	unsigned long flags;
	spin_lock_irqsave(&emu->reg_lock, flags);
	if (reg != emu->last_reg) {
		outw((unsigned short)reg, EMU8000_PTR(emu)); /* Set register */
		emu->last_reg = reg;
	}
	outw((unsigned short)val, port); /* Send low word of data */
	outw((unsigned short)(val>>16), port+2); /* Send high word of data */
	spin_unlock_irqrestore(&emu->reg_lock, flags);
}

/* Read a double word */
unsigned int snd_emu8000_peek_dw(struct snd_emu8000 *emu, unsigned int port, unsigned int reg)
{
	unsigned short low;
	unsigned int res;
	unsigned long flags;
	spin_lock_irqsave(&emu->reg_lock, flags);
	if (reg != emu->last_reg) {
		outw((unsigned short)reg, EMU8000_PTR(emu)); /* Set register */
		emu->last_reg = reg;
	}
	low = inw(port);	/* Read low word of data */
	res = low + (inw(port+2) << 16);
	spin_unlock_irqrestore(&emu->reg_lock, fl