path: root/sound/pci/ad1889.c

/* Analog Devices 1889 audio driver
 *
 * This is a driver for the AD1889 PCI audio chipset found
 * on the HP PA-RISC [BCJ]-xxx0 workstations.
 *
 * Copyright (C) 2004-2005, Kyle McMartin <kyle@parisc-linux.org>
 * Copyright (C) 2005, Thibaut Varene <varenet@parisc-linux.org>
 *   Based on the OSS AD1889 driver by Randolph Chung <tausq@debian.org>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License, version 2, as
 * published by the Free Software Foundation.
 *
 * 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., 675 Mass Ave, Cambridge, MA 02139, USA.
 *
 * TODO:
 *	Do we need to take care of CCS register?
 *	Maybe we could use finer grained locking (separate locks for pb/cap)?
 * Wishlist:
 *	Control Interface (mixer) support
 *	Better AC97 support (VSR...)?
 *	PM support
 *	MIDI support
 *	Game Port support
 *	SG DMA support (this will need *alot* of work)
 */

#include <linux/init.h>
#include <linux/pci.h>
#include <linux/dma-mapping.h>
#include <linux/slab.h>
#include <linux/interrupt.h>
#include <linux/compiler.h>
#include <linux/delay.h>

#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/initval.h>
#include <sound/ac97_codec.h>

#include <asm/io.h>

#include "ad1889.h"
#include "ac97/ac97_id.h"

#define	AD1889_DRVVER	"Version: 1.7"

MODULE_AUTHOR("Kyle McMartin <kyle@parisc-linux.org>, Thibaut Varene <t-bone@parisc-linux.org>");
MODULE_DESCRIPTION("Analog Devices AD1889 ALSA sound driver");
MODULE_LICENSE("GPL");
MODULE_SUPPORTED_DEVICE("{{Analog Devices,AD1889}}");

static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;
module_param_array(index, int, NULL, 0444);
MODULE_PARM_DESC(index, "Index value for the AD1889 soundcard.");

static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;
module_param_array(id, charp, NULL, 0444);
MODULE_PARM_DESC(id, "ID string for the AD1889 soundcard.");

static int enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;
module_param_array(enable, bool, NULL, 0444);
MODULE_PARM_DESC(enable, "Enable AD1889 soundcard.");

static char *ac97_quirk[SNDRV_CARDS];
module_param_array(ac97_quirk, charp, NULL, 0444);
MODULE_PARM_DESC(ac97_quirk, "AC'97 workaround for strange hardware.");

#define DEVNAME "ad1889"
#define PFX	DEVNAME ": "

/* let's use the global sound debug interfaces */
#define ad1889_debug(fmt, arg...) snd_printd(KERN_DEBUG fmt, ## arg)

/* keep track of some hw registers */
struct ad1889_register_state {
	u16 reg;	/* reg setup */
	u32 addr;	/* dma base address */
	unsigned long size;	/* DMA buffer size */
};

struct snd_ad1889 {
	struct snd_card *card;
	struct pci_dev *pci;

	int irq;
	unsigned long bar;
	void __iomem *iobase;

	struct snd_ac97 *ac97;
	struct snd_ac97_bus *ac97_bus;
	struct snd_pcm *pcm;
	struct snd_info_entry *proc;

	struct snd_pcm_substream *psubs;
	struct snd_pcm_substream *csubs;

	/* playback register state */
	struct ad1889_register_state wave;
	struct ad1889_register_state ramc;

	spinlock_t lock;
};

static inline u16
ad1889_readw(struct snd_ad1889 *chip, unsigned reg)
{
	return readw(chip->iobase + reg);
}

static inline void
ad1889_writew(struct snd_ad1889 *chip, unsigned reg, u16 val)
{
	writew(val, chip->iobase + reg);
}

static inline u32
ad1889_readl(struct snd_ad1889 *chip, unsigned reg)
{
	return readl(chip->iobase + reg);
}

static inline void
ad1889_writel(struct snd_ad1889 *chip, unsigned reg, u32 val)
{
	writel(val, chip->iobase + reg);
}

static inline void
ad1889_unmute(struct snd_ad1889 *chip)
{
	u16 st;
	st = ad1889_readw(chip, AD_DS_WADA) & 
		~(AD_DS_WADA_RWAM | AD_DS_WADA_LWAM);
	ad1889_writew(chip, AD_DS_WADA, st);
	ad1889_readw(chip, AD_DS_WADA);
}

static inline void
ad1889_mute(struct snd_ad1889 *chip)
{
	u16 st;
	st = ad1889_readw(chip, AD_DS_WADA) | AD_DS_WADA_RWAM | AD_DS_WADA_LWAM;
	ad1889_writew(chip, AD_DS_WADA, st);
	ad1889_readw(chip, AD_DS_WADA);
}

static inline void
ad1889_load_adc_buffer_address(struct snd_ad1889 *chip, u32 address)
{
	ad1889_writel(chip, AD_DMA_ADCBA, address);
	ad1889_writel(chip, AD_DMA_ADCCA, address</