ak4531_codec.c

来自「优龙2410linux2.6.8内核源代码」· C语言 代码 · 共 448 行 · 第 1/2 页

/*
 *  Copyright (c) by Jaroslav Kysela <[e-mail]>
 *  Universal routines for AK4531 codec
 *
 *
 *   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 <sound/driver.h>
#include <linux/delay.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <sound/core.h>
#include <sound/ak4531_codec.h>

MODULE_AUTHOR("Jaroslav Kysela <[e-mail]>");
MODULE_DESCRIPTION("Universal routines for AK4531 codec");
MODULE_LICENSE("GPL");

#define chip_t ak4531_t

static void snd_ak4531_proc_init(snd_card_t * card, ak4531_t * ak4531);

/*
 *
 */
 
#if 0

static void snd_ak4531_dump(ak4531_t *ak4531)
{
	int idx;
	
	for (idx = 0; idx < 0x19; idx++)
		printk("ak4531 0x%x: 0x%x\n", idx, ak4531->regs[idx]);
}

#endif

/*
 *
 */

#define AK4531_SINGLE(xname, xindex, reg, shift, mask, invert) \
{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \
  .info = snd_ak4531_info_single, \
  .get = snd_ak4531_get_single, .put = snd_ak4531_put_single, \
  .private_value = reg | (shift << 16) | (mask << 24) | (invert << 22) }

static int snd_ak4531_info_single(snd_kcontrol_t * kcontrol, snd_ctl_elem_info_t * uinfo)
{
	int mask = (kcontrol->private_value >> 24) & 0xff;

	uinfo->type = mask == 1 ? SNDRV_CTL_ELEM_TYPE_BOOLEAN : SNDRV_CTL_ELEM_TYPE_INTEGER;
	uinfo->count = 1;
	uinfo->value.integer.min = 0;
	uinfo->value.integer.max = mask;
	return 0;
}
 
static int snd_ak4531_get_single(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol)
{
	ak4531_t *ak4531 = snd_kcontrol_chip(kcontrol);
	unsigned long flags;
	int reg = kcontrol->private_value & 0xff;
	int shift = (kcontrol->private_value >> 16) & 0x07;
	int mask = (kcontrol->private_value >> 24) & 0xff;
	int invert = (kcontrol->private_value >> 22) & 1;
	int val;

	spin_lock_irqsave(&ak4531->reg_lock, flags);
	val = (ak4531->regs[reg] >> shift) & mask;
	spin_unlock_irqrestore(&ak4531->reg_lock, flags);
	if (invert) {
		val = mask - val;
	}
	ucontrol->value.integer.value[0] = val;
	return 0;
}                                                                                                                                                                                                                                                                                                            

static int snd_ak4531_put_single(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol)
{
	ak4531_t *ak4531 = snd_kcontrol_chip(kcontrol);
	unsigned long flags;
	int reg = kcontrol->private_value & 0xff;
	int shift = (kcontrol->private_value >> 16) & 0x07;
	int mask = (kcontrol->private_value >> 24) & 0xff;
	int invert = (kcontrol->private_value >> 22) & 1;
	int change;
	int val;

	val = ucontrol->value.integer.value[0] & mask;
	if (invert) {
		val = mask - val;
	}
	val <<= shift;
	spin_lock_irqsave(&ak4531->reg_lock, flags);
	val = (ak4531->regs[reg] & ~(mask << shift)) | val;
	change = val != ak4531->regs[reg];
	ak4531->write(ak4531, reg, ak4531->regs[reg] = val);
	spin_unlock_irqrestore(&ak4531->reg_lock, flags);
	return change;
}                                                                                                                                                                                                                                                                                                            

#define AK4531_DOUBLE(xname, xindex, left_reg, right_reg, left_shift, right_shift, mask, invert) \
{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \
  .info = snd_ak4531_info_double, \
  .get = snd_ak4531_get_double, .put = snd_ak4531_put_double, \
  .private_value = left_reg | (right_reg << 8) | (left_shift << 16) | (right_shift << 19) | (mask << 24) | (invert << 22) }

static int snd_ak4531_info_double(snd_kcontrol_t * kcontrol, snd_ctl_elem_info_t * uinfo)
{
	int mask = (kcontrol->private_value >> 24) & 0xff;

	uinfo->type = mask == 1 ? SNDRV_CTL_ELEM_TYPE_BOOLEAN : SNDRV_CTL_ELEM_TYPE_INTEGER;
	uinfo->count = 2;
	uinfo->value.integer.min = 0;
	uinfo->value.integer.max = mask;
	return 0;
}
 
static int snd_ak4531_get_double(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol)
{
	ak4531_t *ak4531 = snd_kcontrol_chip(kcontrol);
	unsigned long flags;
	int left_reg = kcontrol->private_value & 0xff;
	int right_reg = (kcontrol->private_value >> 8) & 0xff;
	int left_shift = (kcontrol->private_value >> 16) & 0x07;
	int right_shift = (kcontrol->private_value >> 19) & 0x07;
	int mask = (kcontrol->private_value >> 24) & 0xff;
	int invert = (kcontrol->private_value >> 22) & 1;
	int left, right;

	spin_lock_irqsave(&ak4531->reg_lock, flags);
	left = (ak4531->regs[left_reg] >> left_shift) & mask;
	right = (ak4531->regs[right_reg] >> right_shift) & mask;
	spin_unlock_irqrestore(&ak4531->reg_lock, flags);
	if (invert) {
		left = mask - left;
		right = mask - right;
	}
	ucontrol->value.integer.value[0] = left;
	ucontrol->value.integer.value[1] = right;
	return 0;
}                                                                                                                                                                                                                                                                                                            

static int snd_ak4531_put_double(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol)
{
	ak4531_t *ak4531 = snd_kcontrol_chip(kcontrol);
	unsigned long flags;
	int left_reg = kcontrol->private_value & 0xff;
	int right_reg = (kcontrol->private_value >> 8) & 0xff;
	int left_shift = (kcontrol->private_value >> 16) & 0x07;
	int right_shift = (kcontrol->private_value >> 19) & 0x07;
	int mask = (kcontrol->private_value >> 24) & 0xff;
	int invert = (kcontrol->private_value >> 22) & 1;
	int change;
	int left, right;

	left = ucontrol->value.integer.value[0] & mask;
	right = ucontrol->value.integer.value[1] & mask;
	if (invert) {
		left = mask - left;
		right = mask - right;
	}
	left <<= left_shift;
	right <<= right_shift;
	spin_lock_irqsave(&ak4531->reg_lock, flags);
	if (left_reg == right_reg) {
		left = (ak4531->regs[left_reg] & ~((mask << left_shift) | (mask << right_shift))) | left | right;
		change = left != ak4531->regs[left_reg];
		ak4531->write(ak4531, left_reg, ak4531->regs[left_reg] = left);
	} else {
		left = (ak4531->regs[left_reg] & ~(mask << left_shift)) | left;
		right = (ak4531->regs[right_reg] & ~(mask << right_shift)) | right;
		change = left != ak4531->regs[left_reg] || right != ak4531->regs[right_reg];
		ak4531->write(ak4531, left_reg, ak4531->regs[left_reg] = left);
		ak4531->write(ak4531, right_reg, ak4531->regs[right_reg] = right);
	}
	spin_unlock_irqrestore(&ak4531->reg_lock, flags);
	return change;
}                                                                                                                                                                                                                                                                                                            

#define AK4531_INPUT_SW(xname, xindex, reg1, reg2, left_shift, right_shift) \
{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \
  .info = snd_ak4531_info_input_sw, \
  .get = snd_ak4531_get_input_sw, .put = snd_ak4531_put_input_sw, \
  .private_value = reg1 | (reg2 << 8) | (left_shift << 16) | (right_shift << 24) }

static int snd_ak4531_info_input_sw(snd_kcontrol_t * kcontrol, snd_ctl_elem_info_t * uinfo)
{
	uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
	uinfo->count = 4;
	uinfo->value.integer.min = 0;
	uinfo->value.integer.max = 1;
	return 0;
}
 
static int snd_ak4531_get_input_sw(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol)
{
	ak4531_t *ak4531 = snd_kcontrol_chip(kcontrol);
	unsigned long flags;
	int reg1 = kcontrol->private_value & 0xff;
	int reg2 = (kcontrol->private_value >> 8) & 0xff;
	int left_shift = (kcontrol->private_value >> 16) & 0x0f;
	int right_shift = (kcontrol->private_value >> 24) & 0x0f;

	spin_lock_irqsave(&ak4531->reg_lock, flags);
	ucontrol->value.integer.value[0] = (ak4531->regs[reg1] >> left_shift) & 1;
	ucontrol->value.integer.value[1] = (ak4531->regs[reg2] >> left_shift) & 1;
	ucontrol->value.integer.value[2] = (ak4531->regs[reg1] >> right_shift) & 1;