path: root/sound/parisc/harmony.c

/* Hewlett-Packard Harmony audio driver
 *
 *   This is a driver for the Harmony audio chipset found
 *   on the LASI ASIC of various early HP PA-RISC workstations.
 *
 *   Copyright (C) 2004, Kyle McMartin <kyle@{debian.org,parisc-linux.org}>
 *
 *     Based on the previous Harmony incarnations by,
 *       Copyright 2000 (c) Linuxcare Canada, Alex deVries
 *       Copyright 2000-2003 (c) Helge Deller
 *       Copyright 2001 (c) Matthieu Delahaye
 *       Copyright 2001 (c) Jean-Christophe Vaugeois
 *       Copyright 2003 (c) Laurent Canet
 *       Copyright 2004 (c) Stuart Brady
 *
 *   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.
 *
 * Notes:
 *   - graveyard and silence buffers last for lifetime of
 *     the driver. playback and capture buffers are allocated
 *     per _open()/_close().
 * 
 * TODO:
 *
 */

#include <linux/init.h>
#include <linux/slab.h>
#include <linux/time.h>
#include <linux/wait.h>
#include <linux/delay.h>
#include <linux/module.h>
#include <linux/interrupt.h>
#include <linux/spinlock.h>
#include <linux/dma-mapping.h>

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

#include <asm/io.h>
#include <asm/hardware.h>
#include <asm/parisc-device.h>

#include "harmony.h"

static int index = SNDRV_DEFAULT_IDX1;	/* Index 0-MAX */
static char *id = SNDRV_DEFAULT_STR1;	/* ID for this card */
module_param(index, int, 0444);
MODULE_PARM_DESC(index, "Index value for Harmony driver.");
module_param(id, charp, 0444);
MODULE_PARM_DESC(id, "ID string for Harmony driver.");


static struct parisc_device_id snd_harmony_devtable[] = {
	/* bushmaster / flounder */
	{ HPHW_FIO, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x0007A }, 
	/* 712 / 715 */
	{ HPHW_FIO, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x0007B }, 
	/* pace */
	{ HPHW_FIO, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x0007E }, 
	/* outfield / coral II */
	{ HPHW_FIO, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x0007F },
	{ 0, }
};

MODULE_DEVICE_TABLE(parisc, snd_harmony_devtable);

#define NAME "harmony"
#define PFX  NAME ": "

static unsigned int snd_harmony_rates[] = {
	5512, 6615, 8000, 9600,
	11025, 16000, 18900, 22050,
	27428, 32000, 33075, 37800,
	44100, 48000
};

static unsigned int rate_bits[14] = {
	HARMONY_SR_5KHZ, HARMONY_SR_6KHZ, HARMONY_SR_8KHZ,
	HARMONY_SR_9KHZ, HARMONY_SR_11KHZ, HARMONY_SR_16KHZ,
	HARMONY_SR_18KHZ, HARMONY_SR_22KHZ, HARMONY_SR_27KHZ,
	HARMONY_SR_32KHZ, HARMONY_SR_33KHZ, HARMONY_SR_37KHZ,
	HARMONY_SR_44KHZ, HARMONY_SR_48KHZ
};

static struct snd_pcm_hw_constraint_list hw_constraint_rates = {
	.count = ARRAY_SIZE(snd_harmony_rates),
	.list = snd_harmony_rates,
	.mask = 0,
};

static inline unsigned long
harmony_read(struct snd_harmony *h, unsigned r)
{
	return __raw_readl(h->iobase + r);
}

static inline void
harmony_write(struct snd_harmony *h, unsigned r, unsigned long v)
{
	__raw_writel(v, h->iobase + r);
}

static inline void
harmony_wait_for_control(struct snd_harmony *h)
{
	while (harmony_read(h, HARMONY_CNTL) & HARMONY_CNTL_C) ;
}

static inline void
harmony_reset(struct snd_harmony *h)
{
	harmony_write(h, HARMONY_RESET, 1);
	mdelay(50);
	harmony_write(h, HARMONY_RESET, 0);
}

static void
harmony_disable_interrupts(struct snd_harmony *h)
{
	u32 dstatus;
	harmony_wait_for_control(h);
	dstatus = harmony_read(h, HARMONY_DSTATUS);
	dstatus &= ~HARMONY_DSTATUS_IE;
	harmony_write(h, HARMONY_DSTATUS, dstatus);
}

static void
harmony_enable_interrupts(struct snd_harmony *h)
{
	u32 dstatus;
	harmony_wait_for_control(h);
	dstatus = harmony_read(h, HARMONY_DSTATUS);
	dstatus |= HARMONY_DSTATUS_IE;
	harmony_write(h, HARMONY_DSTATUS, dstatus);
}

static void
harmony_mute(struct snd_harmony *h)
{
	unsigned long flags;

	spin_lock_irqsave(&h->mixer_lock, flags);
	harmony_wait_for_control(h);
	harmony_write(h, HARMONY_GAINCTL, HARMONY_GAIN_SILENCE);
	spin_unlock_irqrestore(&h->mixer_lock, flags);
}

static void
harmony_unmute