path: root/sound/pci/atiixp_modem.c

/*
 *   ALSA driver for ATI IXP 150/200/250 AC97 modem controllers
 *
 *	Copyright (c) 2004 Takashi Iwai <tiwai@suse.de>
 *
 *   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 <asm/io.h>
#include <linux/delay.h>
#include <linux/interrupt.h>
#include <linux/init.h>
#include <linux/pci.h>
#include <linux/slab.h>
#include <linux/moduleparam.h>
#include <linux/mutex.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/info.h>
#include <sound/ac97_codec.h>
#include <sound/initval.h>

MODULE_AUTHOR("Takashi Iwai <tiwai@suse.de>");
MODULE_DESCRIPTION("ATI IXP MC97 controller");
MODULE_LICENSE("GPL");
MODULE_SUPPORTED_DEVICE("{{ATI,IXP150/200/250}}");

static int index = -2; /* Exclude the first card */
static char *id = SNDRV_DEFAULT_STR1;	/* ID for this card */
static int ac97_clock = 48000;

module_param(index, int, 0444);
MODULE_PARM_DESC(index, "Index value for ATI IXP controller.");
module_param(id, charp, 0444);
MODULE_PARM_DESC(id, "ID string for ATI IXP controller.");
module_param(ac97_clock, int, 0444);
MODULE_PARM_DESC(ac97_clock, "AC'97 codec clock (default 48000Hz).");

/* just for backward compatibility */
static int enable;
module_param(enable, bool, 0444);


/*
 */

#define ATI_REG_ISR			0x00	/* interrupt source */
#define  ATI_REG_ISR_MODEM_IN_XRUN	(1U<<0)
#define  ATI_REG_ISR_MODEM_IN_STATUS	(1U<<1)
#define  ATI_REG_ISR_MODEM_OUT1_XRUN	(1U<<2)
#define  ATI_REG_ISR_MODEM_OUT1_STATUS	(1U<<3)
#define  ATI_REG_ISR_MODEM_OUT2_XRUN	(1U<<4)
#define  ATI_REG_ISR_MODEM_OUT2_STATUS	(1U<<5)
#define  ATI_REG_ISR_MODEM_OUT3_XRUN	(1U<<6)
#define  ATI_REG_ISR_MODEM_OUT3_STATUS	(1U<<7)
#define  ATI_REG_ISR_PHYS_INTR		(1U<<8)
#define  ATI_REG_ISR_PHYS_MISMATCH	(1U<<9)
#define  ATI_REG_ISR_CODEC0_NOT_READY	(1U<<10)
#define  ATI_REG_ISR_CODEC1_NOT_READY	(1U<<11)
#define  ATI_REG_ISR_CODEC2_NOT_READY	(1U<<12)
#define  ATI_REG_ISR_NEW_FRAME		(1U<<13)
#define  ATI_REG_ISR_MODEM_GPIO_DATA	(1U<<14)

#define ATI_REG_IER			0x04	/* interrupt enable */
#define  ATI_REG_IER_MODEM_IN_XRUN_EN	(1U<<0)
#define  ATI_REG_IER_MODEM_STATUS_EN	(1U<<1)
#define  ATI_REG_IER_MODEM_OUT1_XRUN_EN	(1U<<2)
#define  ATI_REG_IER_MODEM_OUT2_XRUN_EN	(1U<<4)
#define  ATI_REG_IER_MODEM_OUT3_XRUN_EN	(1U<<6)
#define  ATI_REG_IER_PHYS_INTR_EN	(1U<<8)
#define  ATI_REG_IER_PHYS_MISMATCH_EN	(1U<<9)
#define  ATI_REG_IER_CODEC0_INTR_EN	(1U<<10)
#define  ATI_REG_IER_CODEC1_INTR_EN	(1U<<11)
#define  ATI_REG_IER_CODEC2_INTR_EN	(1U<<12)
#define  ATI_REG_IER_NEW_FRAME_EN	(1U<<13)	/* (RO */
#define  ATI_REG_IER_MODEM_GPIO_DATA_EN	(1U<<14)	/* (WO) modem is running */
#define  ATI_REG_IER_MODEM_SET_BUS_BUSY	(1U<<15)

#define ATI_REG_CMD			0x08	/* command */
#define  ATI_REG_CMD_POWERDOWN	(1U<<0)
#define  ATI_REG_CMD_MODEM_RECEIVE_EN	(1U<<1)	/* modem only */
#define  ATI_REG_CMD_MODEM_SEND1_EN	(1U<<2)	/* modem only */
#define  ATI_REG_CMD_MODEM_SEND2_EN	(1U<<3)	/* modem only */
#define  ATI_REG_CMD_MODEM_SEND3_EN	(1U<<4)	/* modem only */
#define  ATI_REG_CMD_MODEM_STATUS_MEM	(1U<<5)	/* modem only */
#define  ATI_REG_CMD_MODEM_IN_DMA_EN	(1U<<8)	/* modem only */
#define  ATI_REG_CMD_MODEM_OUT_DMA1_EN	(1U<<9)	/* modem only */
#define  ATI_REG_CMD_MODEM_OUT_DMA2_EN	(1U<<10)	/* modem only */
#define  ATI_REG_CMD_MODEM_OUT_DMA3_EN	(1U<<11)	/* modem only */
#define  ATI_REG_CMD_AUDIO_PRESENT	(1U<<20)
#define  ATI_REG_CMD_MODEM_GPIO_THRU_DMA	(1U<<22)