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linux/sound/i2c/other/pt2258.c
Thomas Gleixner 1a59d1b8e0 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156
Based on 1 normalized pattern(s):

  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

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-or-later

has been chosen to replace the boilerplate/reference in 1334 file(s).

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Allison Randal <allison@lohutok.net>
Reviewed-by: Richard Fontana <rfontana@redhat.com>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190527070033.113240726@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-05-30 11:26:35 -07:00

214 lines
5.4 KiB
C

// SPDX-License-Identifier: GPL-2.0-or-later
/*
* ALSA Driver for the PT2258 volume controller.
*
* Copyright (c) 2006 Jochen Voss <voss@seehuhn.de>
*/
#include <sound/core.h>
#include <sound/control.h>
#include <sound/tlv.h>
#include <sound/i2c.h>
#include <sound/pt2258.h>
#include <linux/module.h>
MODULE_AUTHOR("Jochen Voss <voss@seehuhn.de>");
MODULE_DESCRIPTION("PT2258 volume controller (Princeton Technology Corp.)");
MODULE_LICENSE("GPL");
#define PT2258_CMD_RESET 0xc0
#define PT2258_CMD_UNMUTE 0xf8
#define PT2258_CMD_MUTE 0xf9
static const unsigned char pt2258_channel_code[12] = {
0x80, 0x90, /* channel 1: -10dB, -1dB */
0x40, 0x50, /* channel 2: -10dB, -1dB */
0x00, 0x10, /* channel 3: -10dB, -1dB */
0x20, 0x30, /* channel 4: -10dB, -1dB */
0x60, 0x70, /* channel 5: -10dB, -1dB */
0xa0, 0xb0 /* channel 6: -10dB, -1dB */
};
int snd_pt2258_reset(struct snd_pt2258 *pt)
{
unsigned char bytes[2];
int i;
/* reset chip */
bytes[0] = PT2258_CMD_RESET;
snd_i2c_lock(pt->i2c_bus);
if (snd_i2c_sendbytes(pt->i2c_dev, bytes, 1) != 1)
goto __error;
snd_i2c_unlock(pt->i2c_bus);
/* mute all channels */
pt->mute = 1;
bytes[0] = PT2258_CMD_MUTE;
snd_i2c_lock(pt->i2c_bus);
if (snd_i2c_sendbytes(pt->i2c_dev, bytes, 1) != 1)
goto __error;
snd_i2c_unlock(pt->i2c_bus);
/* set all channels to 0dB */
for (i = 0; i < 6; ++i)
pt->volume[i] = 0;
bytes[0] = 0xd0;
bytes[1] = 0xe0;
snd_i2c_lock(pt->i2c_bus);
if (snd_i2c_sendbytes(pt->i2c_dev, bytes, 2) != 2)
goto __error;
snd_i2c_unlock(pt->i2c_bus);
return 0;
__error:
snd_i2c_unlock(pt->i2c_bus);
snd_printk(KERN_ERR "PT2258 reset failed\n");
return -EIO;
}
static int pt2258_stereo_volume_info(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_info *uinfo)
{
uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
uinfo->count = 2;
uinfo->value.integer.min = 0;
uinfo->value.integer.max = 79;
return 0;
}
static int pt2258_stereo_volume_get(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_pt2258 *pt = kcontrol->private_data;
int base = kcontrol->private_value;
/* chip does not support register reads */
ucontrol->value.integer.value[0] = 79 - pt->volume[base];
ucontrol->value.integer.value[1] = 79 - pt->volume[base + 1];
return 0;
}
static int pt2258_stereo_volume_put(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_pt2258 *pt = kcontrol->private_data;
int base = kcontrol->private_value;
unsigned char bytes[2];
int val0, val1;
val0 = 79 - ucontrol->value.integer.value[0];
val1 = 79 - ucontrol->value.integer.value[1];
if (val0 < 0 || val0 > 79 || val1 < 0 || val1 > 79)
return -EINVAL;
if (val0 == pt->volume[base] && val1 == pt->volume[base + 1])
return 0;
pt->volume[base] = val0;
bytes[0] = pt2258_channel_code[2 * base] | (val0 / 10);
bytes[1] = pt2258_channel_code[2 * base + 1] | (val0 % 10);
snd_i2c_lock(pt->i2c_bus);
if (snd_i2c_sendbytes(pt->i2c_dev, bytes, 2) != 2)
goto __error;
snd_i2c_unlock(pt->i2c_bus);
pt->volume[base + 1] = val1;
bytes[0] = pt2258_channel_code[2 * base + 2] | (val1 / 10);
bytes[1] = pt2258_channel_code[2 * base + 3] | (val1 % 10);
snd_i2c_lock(pt->i2c_bus);
if (snd_i2c_sendbytes(pt->i2c_dev, bytes, 2) != 2)
goto __error;
snd_i2c_unlock(pt->i2c_bus);
return 1;
__error:
snd_i2c_unlock(pt->i2c_bus);
snd_printk(KERN_ERR "PT2258 access failed\n");
return -EIO;
}
#define pt2258_switch_info snd_ctl_boolean_mono_info
static int pt2258_switch_get(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_pt2258 *pt = kcontrol->private_data;
ucontrol->value.integer.value[0] = !pt->mute;
return 0;
}
static int pt2258_switch_put(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_pt2258 *pt = kcontrol->private_data;
unsigned char bytes[2];
int val;
val = !ucontrol->value.integer.value[0];
if (pt->mute == val)
return 0;
pt->mute = val;
bytes[0] = val ? PT2258_CMD_MUTE : PT2258_CMD_UNMUTE;
snd_i2c_lock(pt->i2c_bus);
if (snd_i2c_sendbytes(pt->i2c_dev, bytes, 1) != 1)
goto __error;
snd_i2c_unlock(pt->i2c_bus);
return 1;
__error:
snd_i2c_unlock(pt->i2c_bus);
snd_printk(KERN_ERR "PT2258 access failed 2\n");
return -EIO;
}
static const DECLARE_TLV_DB_SCALE(pt2258_db_scale, -7900, 100, 0);
int snd_pt2258_build_controls(struct snd_pt2258 *pt)
{
struct snd_kcontrol_new knew;
char *names[3] = {
"Mic Loopback Playback Volume",
"Line Loopback Playback Volume",
"CD Loopback Playback Volume"
};
int i, err;
for (i = 0; i < 3; ++i) {
memset(&knew, 0, sizeof(knew));
knew.name = names[i];
knew.iface = SNDRV_CTL_ELEM_IFACE_MIXER;
knew.count = 1;
knew.access = SNDRV_CTL_ELEM_ACCESS_READWRITE |
SNDRV_CTL_ELEM_ACCESS_TLV_READ;
knew.private_value = 2 * i;
knew.info = pt2258_stereo_volume_info;
knew.get = pt2258_stereo_volume_get;
knew.put = pt2258_stereo_volume_put;
knew.tlv.p = pt2258_db_scale;
err = snd_ctl_add(pt->card, snd_ctl_new1(&knew, pt));
if (err < 0)
return err;
}
memset(&knew, 0, sizeof(knew));
knew.name = "Loopback Switch";
knew.iface = SNDRV_CTL_ELEM_IFACE_MIXER;
knew.info = pt2258_switch_info;
knew.get = pt2258_switch_get;
knew.put = pt2258_switch_put;
knew.access = 0;
err = snd_ctl_add(pt->card, snd_ctl_new1(&knew, pt));
if (err < 0)
return err;
return 0;
}
EXPORT_SYMBOL(snd_pt2258_reset);
EXPORT_SYMBOL(snd_pt2258_build_controls);