[linux-2.6-block.git] / sound / pci / ice1712 / ak4xxx.c

/*
 *   ALSA driver for ICEnsemble ICE1712 (Envy24)
 *
 *   AK4524 / AK4528 / AK4529 / AK4355 / AK4381 interface
 *
 *	Copyright (c) 2000 Jaroslav Kysela <perex@perex.cz>
 *
 *   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/io.h>
#include <linux/delay.h>
#include <linux/interrupt.h>
#include <linux/slab.h>
#include <linux/init.h>
#include <linux/module.h>
#include <sound/core.h>
#include <sound/initval.h>
#include "ice1712.h"

MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>");
MODULE_DESCRIPTION("ICEnsemble ICE17xx <-> AK4xxx AD/DA chip interface");
MODULE_LICENSE("GPL");

static void snd_ice1712_akm4xxx_lock(struct snd_akm4xxx *ak, int chip)
{
	struct snd_ice1712 *ice = ak->private_data[0];

	snd_ice1712_save_gpio_status(ice);
}

static void snd_ice1712_akm4xxx_unlock(struct snd_akm4xxx *ak, int chip)
{
	struct snd_ice1712 *ice = ak->private_data[0];

	snd_ice1712_restore_gpio_status(ice);
}

/*
 * write AK4xxx register
 */
static void snd_ice1712_akm4xxx_write(struct snd_akm4xxx *ak, int chip,
				      unsigned char addr, unsigned char data)
{
	unsigned int tmp;
	int idx;
	unsigned int addrdata;
	struct snd_ak4xxx_private *priv = (void *)ak->private_value[0];
	struct snd_ice1712 *ice = ak->private_data[0];

	if (snd_BUG_ON(chip < 0 || chip >= 4))
		return;

	tmp = snd_ice1712_gpio_read(ice);
	tmp |= priv->add_flags;
	tmp &= ~priv->mask_flags;
	if (priv->cs_mask == priv->cs_addr) {
		if (priv->cif) {
			tmp |= priv->cs_mask; /* start without chip select */
		}  else {
			tmp &= ~priv->cs_mask; /* chip select low */
			snd_ice1712_gpio_write(ice, tmp);
			udelay(1);
		}
	} else {
		/* doesn't handle cf=1 yet */
		tmp &= ~priv->cs_mask;
		tmp |= priv->cs_addr;
		snd_ice1712_gpio_write(ice, tmp);
		udelay(1);
	}

	/* build I2C address + data byte */
	addrdata = (priv->caddr << 6) | 0x20 | (addr & 0x1f);
	addrdata = (addrdata << 8) | data;
	for (idx = 15; idx >= 0; idx--) {
		/* drop clock */
		tmp &= ~priv->clk_mask;
		snd_ice1712_gpio_write(ice, tmp);
		udelay(1);
		/* set data */
		if (addrdata & (1 << idx))
			tmp |= priv->data_mask;
		else
			tmp &= ~priv->data_mask;
		snd_ice1712_gpio_write(ice, tmp);
		udelay(1);
		/* raise clock */
		tmp |= priv->clk_mask;
		snd_ice1712_gpio_write(ice, tmp);
		udelay(1);
	}

	if (priv->cs_mask == priv->cs_addr) {
		if (priv->cif) {
			/* assert a cs pulse to trigger */
			tmp &= ~priv->cs_mask;
			snd_ice1712_gpio_write(ice, tmp);
			udelay(1);
		}
		tmp |= priv->cs_mask; /* chip select high to trigger */
	} else {
		tmp &= ~priv->cs_mask;
		tmp |= priv->cs_none; /* deselect address */
	}
	snd_ice1712_gpio_write(ice, tmp);
	udelay(1);
}

/*
 * initialize the struct snd_akm4xxx record with the template
 */
int snd_ice1712_akm4xxx_init(struct snd_akm4xxx *ak, const struct snd_akm4xxx *temp,
			     const struct snd_ak4xxx_private *_priv, struct snd_ice1712 *ice)
{
	struct snd_ak4xxx_private *priv;

	if (_priv != NULL) {
		priv = kmalloc(sizeof(*priv), GFP_KERNEL);
		if (priv == NULL)
			return -ENOMEM;
		*priv = *_priv;
	} else {
		priv = NULL;
	}
	*ak = *temp;
	ak->card = ice->card;
        ak->private_value[0] = (unsigned long)priv;
	ak->private_data[0] = ice;
	if (ak->ops.lock == NULL)
		ak->ops.lock = snd_ice1712_akm4xxx_lock;
	if (ak->ops.unlock == NULL)
		ak->ops.unlock = snd_ice1712_akm4xxx_unlock;
	if (ak->ops.write == NULL)
		ak->ops.write = snd_ice1712_akm4xxx_write;
	snd_akm4xxx_init(ak);
	return 0;
}

void snd_ice1712_akm4xxx_free(struct snd_ice1712 *ice)
{
	unsigned int akidx;
	if (ice->akm == NULL)
		return;
	for (akidx = 0; akidx < ice->akm_codecs; akidx++) {
		struct snd_akm4xxx *ak = &ice->akm[akidx];
		kfree((void*)ak->private_value[0]);
	}
	kfree(ice->akm);
}

/*
 * build AK4xxx controls
 */
int snd_ice1712_akm4xxx_build_controls(struct snd_ice1712 *ice)
{
	unsigned int akidx;
	int err;

	for (akidx = 0; akidx < ice->akm_codecs; akidx++) {
		struct snd_akm4xxx *ak = &ice->akm[akidx];
		err = snd_akm4xxx_build_controls(ak);
		if (err < 0)
			return err;
	}
	return 0;
}

static int __init alsa_ice1712_akm4xxx_module_init(void)
{
	return 0;
}
        
static void __exit alsa_ice1712_akm4xxx_module_exit(void)
{
}
        
module_init(alsa_ice1712_akm4xxx_module_init)
module_exit(alsa_ice1712_akm4xxx_module_exit)

EXPORT_SYMBOL(snd_ice1712_akm4xxx_init);
EXPORT_SYMBOL(snd_ice1712_akm4xxx_free);
EXPORT_SYMBOL(snd_ice1712_akm4xxx_build_controls);
Commit	Line	Data
1da177e4 LT	1	/*
	2	* ALSA driver for ICEnsemble ICE1712 (Envy24)
	3	*
	4	* AK4524 / AK4528 / AK4529 / AK4355 / AK4381 interface
	5	*
c1017a4c	6	* Copyright (c) 2000 Jaroslav Kysela <perex@perex.cz>
1da177e4 LT	7	*
	8	* This program is free software; you can redistribute it and/or modify
	9	* it under the terms of the GNU General Public License as published by
	10	* the Free Software Foundation; either version 2 of the License, or
	11	* (at your option) any later version.
	12	*
	13	* This program is distributed in the hope that it will be useful,
	14	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	15	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	16	* GNU General Public License for more details.
	17	*
	18	* You should have received a copy of the GNU General Public License
	19	* along with this program; if not, write to the Free Software
	20	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	21	*
	22	*/
	23
6cbbfe1c	24	#include <linux/io.h>
1da177e4 LT	25	#include <linux/delay.h>
1da177e4 LT	26	#include <linux/interrupt.h>
5a0e3ad6	27	#include <linux/slab.h>
1da177e4	28	#include <linux/init.h>
da155d5b	29	#include <linux/module.h>
1da177e4 LT	30	#include <sound/core.h>
	31	#include <sound/initval.h>
	32	#include "ice1712.h"
	33
c1017a4c	34	MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>");
1da177e4 LT	35	MODULE_DESCRIPTION("ICEnsemble ICE17xx <-> AK4xxx AD/DA chip interface");
	36	MODULE_LICENSE("GPL");
	37
6ca308d4	38	static void snd_ice1712_akm4xxx_lock(struct snd_akm4xxx *ak, int chip)
1da177e4	39	{
6ca308d4	40	struct snd_ice1712 *ice = ak->private_data[0];
1da177e4 LT	41
	42	snd_ice1712_save_gpio_status(ice);
	43	}
	44
6ca308d4	45	static void snd_ice1712_akm4xxx_unlock(struct snd_akm4xxx *ak, int chip)
1da177e4	46	{
6ca308d4	47	struct snd_ice1712 *ice = ak->private_data[0];
1da177e4 LT	48
	49	snd_ice1712_restore_gpio_status(ice);
	50	}
	51
	52	/*
	53	* write AK4xxx register
	54	*/
6ca308d4	55	static void snd_ice1712_akm4xxx_write(struct snd_akm4xxx *ak, int chip,
1da177e4 LT	56	unsigned char addr, unsigned char data)
	57	{
	58	unsigned int tmp;
	59	int idx;
	60	unsigned int addrdata;
	61	struct snd_ak4xxx_private priv = (void )ak->private_value[0];
6ca308d4	62	struct snd_ice1712 *ice = ak->private_data[0];
1da177e4	63
da3cec35 TI	64	if (snd_BUG_ON(chip < 0 \|\| chip >= 4))
da3cec35 TI	65	return;
1da177e4 LT	66
	67	tmp = snd_ice1712_gpio_read(ice);
	68	tmp \|= priv->add_flags;
	69	tmp &= ~priv->mask_flags;
	70	if (priv->cs_mask == priv->cs_addr) {
	71	if (priv->cif) {
	72	tmp \|= priv->cs_mask; /* start without chip select */
	73	} else {
	74	tmp &= ~priv->cs_mask; /* chip select low */
	75	snd_ice1712_gpio_write(ice, tmp);
	76	udelay(1);
	77	}
	78	} else {
	79	/* doesn't handle cf=1 yet */
	80	tmp &= ~priv->cs_mask;
	81	tmp \|= priv->cs_addr;
	82	snd_ice1712_gpio_write(ice, tmp);
	83	udelay(1);
	84	}
	85
	86	/* build I2C address + data byte */
	87	addrdata = (priv->caddr << 6) \| 0x20 \| (addr & 0x1f);
	88	addrdata = (addrdata << 8) \| data;
	89	for (idx = 15; idx >= 0; idx--) {
	90	/* drop clock */
	91	tmp &= ~priv->clk_mask;
	92	snd_ice1712_gpio_write(ice, tmp);
	93	udelay(1);
	94	/* set data */
	95	if (addrdata & (1 << idx))
	96	tmp \|= priv->data_mask;
	97	else
	98	tmp &= ~priv->data_mask;
	99	snd_ice1712_gpio_write(ice, tmp);
	100	udelay(1);
	101	/* raise clock */
	102	tmp \|= priv->clk_mask;
	103	snd_ice1712_gpio_write(ice, tmp);
	104	udelay(1);
	105	}
	106
	107	if (priv->cs_mask == priv->cs_addr) {
	108	if (priv->cif) {
	109	/* assert a cs pulse to trigger */
	110	tmp &= ~priv->cs_mask;
	111	snd_ice1712_gpio_write(ice, tmp);
	112	udelay(1);
	113	}
	114	tmp \|= priv->cs_mask; /* chip select high to trigger */
	115	} else {
	116	tmp &= ~priv->cs_mask;
	117	tmp \|= priv->cs_none; /* deselect address */
	118	}
	119	snd_ice1712_gpio_write(ice, tmp);
	120	udelay(1);
	121	}
	122
	123	/*
6ca308d4	124	* initialize the struct snd_akm4xxx record with the template
1da177e4	125	*/
6ca308d4 TI	126	int snd_ice1712_akm4xxx_init(struct snd_akm4xxx ak, const struct snd_akm4xxx temp,
6ca308d4 TI	127	const struct snd_ak4xxx_private _priv, struct snd_ice1712 ice)
1da177e4 LT	128	{
	129	struct snd_ak4xxx_private *priv;
	130
	131	if (_priv != NULL) {
	132	priv = kmalloc(sizeof(*priv), GFP_KERNEL);
	133	if (priv == NULL)
	134	return -ENOMEM;
	135	priv = _priv;
	136	} else {
	137	priv = NULL;
	138	}
	139	ak = temp;
	140	ak->card = ice->card;
	141	ak->private_value[0] = (unsigned long)priv;
	142	ak->private_data[0] = ice;
	143	if (ak->ops.lock == NULL)
	144	ak->ops.lock = snd_ice1712_akm4xxx_lock;
	145	if (ak->ops.unlock == NULL)
	146	ak->ops.unlock = snd_ice1712_akm4xxx_unlock;
	147	if (ak->ops.write == NULL)
	148	ak->ops.write = snd_ice1712_akm4xxx_write;
	149	snd_akm4xxx_init(ak);
	150	return 0;
	151	}
	152
6ca308d4	153	void snd_ice1712_akm4xxx_free(struct snd_ice1712 *ice)
1da177e4 LT	154	{
	155	unsigned int akidx;
	156	if (ice->akm == NULL)
	157	return;
	158	for (akidx = 0; akidx < ice->akm_codecs; akidx++) {
6ca308d4	159	struct snd_akm4xxx *ak = &ice->akm[akidx];
1da177e4 LT	160	kfree((void*)ak->private_value[0]);
	161	}
	162	kfree(ice->akm);
	163	}
	164
	165	/*
	166	* build AK4xxx controls
	167	*/
6ca308d4	168	int snd_ice1712_akm4xxx_build_controls(struct snd_ice1712 *ice)
1da177e4 LT	169	{
	170	unsigned int akidx;
	171	int err;
	172
	173	for (akidx = 0; akidx < ice->akm_codecs; akidx++) {
6ca308d4	174	struct snd_akm4xxx *ak = &ice->akm[akidx];
1da177e4 LT	175	err = snd_akm4xxx_build_controls(ak);
	176	if (err < 0)
	177	return err;
	178	}
	179	return 0;
	180	}
	181
	182	static int __init alsa_ice1712_akm4xxx_module_init(void)
	183	{
	184	return 0;
	185	}
	186
	187	static void __exit alsa_ice1712_akm4xxx_module_exit(void)
	188	{
	189	}
	190
	191	module_init(alsa_ice1712_akm4xxx_module_init)
	192	module_exit(alsa_ice1712_akm4xxx_module_exit)
	193
	194	EXPORT_SYMBOL(snd_ice1712_akm4xxx_init);
	195	EXPORT_SYMBOL(snd_ice1712_akm4xxx_free);
	196	EXPORT_SYMBOL(snd_ice1712_akm4xxx_build_controls);