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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>
269 lines
6.2 KiB
C
269 lines
6.2 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* PMac DACA lowlevel functions
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*
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* Copyright (c) by Takashi Iwai <tiwai@suse.de>
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*/
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#include <linux/init.h>
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#include <linux/i2c.h>
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#include <linux/kmod.h>
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#include <linux/slab.h>
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#include <sound/core.h>
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#include "pmac.h"
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/* i2c address */
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#define DACA_I2C_ADDR 0x4d
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/* registers */
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#define DACA_REG_SR 0x01
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#define DACA_REG_AVOL 0x02
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#define DACA_REG_GCFG 0x03
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/* maximum volume value */
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#define DACA_VOL_MAX 0x38
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struct pmac_daca {
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struct pmac_keywest i2c;
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int left_vol, right_vol;
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unsigned int deemphasis : 1;
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unsigned int amp_on : 1;
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};
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/*
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* initialize / detect DACA
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*/
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static int daca_init_client(struct pmac_keywest *i2c)
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{
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unsigned short wdata = 0x00;
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/* SR: no swap, 1bit delay, 32-48kHz */
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/* GCFG: power amp inverted, DAC on */
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if (i2c_smbus_write_byte_data(i2c->client, DACA_REG_SR, 0x08) < 0 ||
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i2c_smbus_write_byte_data(i2c->client, DACA_REG_GCFG, 0x05) < 0)
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return -EINVAL;
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return i2c_smbus_write_block_data(i2c->client, DACA_REG_AVOL,
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2, (unsigned char*)&wdata);
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}
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/*
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* update volume
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*/
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static int daca_set_volume(struct pmac_daca *mix)
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{
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unsigned char data[2];
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if (! mix->i2c.client)
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return -ENODEV;
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if (mix->left_vol > DACA_VOL_MAX)
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data[0] = DACA_VOL_MAX;
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else
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data[0] = mix->left_vol;
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if (mix->right_vol > DACA_VOL_MAX)
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data[1] = DACA_VOL_MAX;
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else
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data[1] = mix->right_vol;
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data[1] |= mix->deemphasis ? 0x40 : 0;
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if (i2c_smbus_write_block_data(mix->i2c.client, DACA_REG_AVOL,
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2, data) < 0) {
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snd_printk(KERN_ERR "failed to set volume \n");
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return -EINVAL;
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}
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return 0;
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}
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/* deemphasis switch */
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#define daca_info_deemphasis snd_ctl_boolean_mono_info
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static int daca_get_deemphasis(struct snd_kcontrol *kcontrol,
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struct snd_ctl_elem_value *ucontrol)
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{
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struct snd_pmac *chip = snd_kcontrol_chip(kcontrol);
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struct pmac_daca *mix;
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if (! (mix = chip->mixer_data))
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return -ENODEV;
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ucontrol->value.integer.value[0] = mix->deemphasis ? 1 : 0;
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return 0;
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}
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static int daca_put_deemphasis(struct snd_kcontrol *kcontrol,
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struct snd_ctl_elem_value *ucontrol)
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{
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struct snd_pmac *chip = snd_kcontrol_chip(kcontrol);
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struct pmac_daca *mix;
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int change;
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if (! (mix = chip->mixer_data))
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return -ENODEV;
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change = mix->deemphasis != ucontrol->value.integer.value[0];
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if (change) {
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mix->deemphasis = !!ucontrol->value.integer.value[0];
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daca_set_volume(mix);
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}
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return change;
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}
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/* output volume */
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static int daca_info_volume(struct snd_kcontrol *kcontrol,
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struct snd_ctl_elem_info *uinfo)
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{
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uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
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uinfo->count = 2;
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uinfo->value.integer.min = 0;
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uinfo->value.integer.max = DACA_VOL_MAX;
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return 0;
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}
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static int daca_get_volume(struct snd_kcontrol *kcontrol,
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struct snd_ctl_elem_value *ucontrol)
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{
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struct snd_pmac *chip = snd_kcontrol_chip(kcontrol);
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struct pmac_daca *mix;
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if (! (mix = chip->mixer_data))
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return -ENODEV;
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ucontrol->value.integer.value[0] = mix->left_vol;
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ucontrol->value.integer.value[1] = mix->right_vol;
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return 0;
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}
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static int daca_put_volume(struct snd_kcontrol *kcontrol,
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struct snd_ctl_elem_value *ucontrol)
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{
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struct snd_pmac *chip = snd_kcontrol_chip(kcontrol);
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struct pmac_daca *mix;
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unsigned int vol[2];
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int change;
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if (! (mix = chip->mixer_data))
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return -ENODEV;
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vol[0] = ucontrol->value.integer.value[0];
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vol[1] = ucontrol->value.integer.value[1];
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if (vol[0] > DACA_VOL_MAX || vol[1] > DACA_VOL_MAX)
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return -EINVAL;
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change = mix->left_vol != vol[0] ||
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mix->right_vol != vol[1];
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if (change) {
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mix->left_vol = vol[0];
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mix->right_vol = vol[1];
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daca_set_volume(mix);
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}
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return change;
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}
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/* amplifier switch */
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#define daca_info_amp daca_info_deemphasis
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static int daca_get_amp(struct snd_kcontrol *kcontrol,
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struct snd_ctl_elem_value *ucontrol)
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{
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struct snd_pmac *chip = snd_kcontrol_chip(kcontrol);
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struct pmac_daca *mix;
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if (! (mix = chip->mixer_data))
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return -ENODEV;
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ucontrol->value.integer.value[0] = mix->amp_on ? 1 : 0;
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return 0;
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}
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static int daca_put_amp(struct snd_kcontrol *kcontrol,
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struct snd_ctl_elem_value *ucontrol)
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{
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struct snd_pmac *chip = snd_kcontrol_chip(kcontrol);
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struct pmac_daca *mix;
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int change;
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if (! (mix = chip->mixer_data))
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return -ENODEV;
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change = mix->amp_on != ucontrol->value.integer.value[0];
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if (change) {
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mix->amp_on = !!ucontrol->value.integer.value[0];
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i2c_smbus_write_byte_data(mix->i2c.client, DACA_REG_GCFG,
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mix->amp_on ? 0x05 : 0x04);
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}
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return change;
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}
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static struct snd_kcontrol_new daca_mixers[] = {
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{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
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.name = "Deemphasis Switch",
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.info = daca_info_deemphasis,
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.get = daca_get_deemphasis,
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.put = daca_put_deemphasis
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},
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{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
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.name = "Master Playback Volume",
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.info = daca_info_volume,
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.get = daca_get_volume,
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.put = daca_put_volume
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},
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{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
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.name = "Power Amplifier Switch",
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.info = daca_info_amp,
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.get = daca_get_amp,
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.put = daca_put_amp
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},
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};
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#ifdef CONFIG_PM
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static void daca_resume(struct snd_pmac *chip)
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{
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struct pmac_daca *mix = chip->mixer_data;
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i2c_smbus_write_byte_data(mix->i2c.client, DACA_REG_SR, 0x08);
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i2c_smbus_write_byte_data(mix->i2c.client, DACA_REG_GCFG,
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mix->amp_on ? 0x05 : 0x04);
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daca_set_volume(mix);
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}
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#endif /* CONFIG_PM */
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static void daca_cleanup(struct snd_pmac *chip)
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{
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struct pmac_daca *mix = chip->mixer_data;
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if (! mix)
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return;
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snd_pmac_keywest_cleanup(&mix->i2c);
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kfree(mix);
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chip->mixer_data = NULL;
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}
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/* exported */
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int snd_pmac_daca_init(struct snd_pmac *chip)
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{
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int i, err;
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struct pmac_daca *mix;
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request_module("i2c-powermac");
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mix = kzalloc(sizeof(*mix), GFP_KERNEL);
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if (! mix)
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return -ENOMEM;
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chip->mixer_data = mix;
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chip->mixer_free = daca_cleanup;
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mix->amp_on = 1; /* default on */
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mix->i2c.addr = DACA_I2C_ADDR;
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mix->i2c.init_client = daca_init_client;
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mix->i2c.name = "DACA";
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if ((err = snd_pmac_keywest_init(&mix->i2c)) < 0)
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return err;
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/*
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* build mixers
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*/
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strcpy(chip->card->mixername, "PowerMac DACA");
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for (i = 0; i < ARRAY_SIZE(daca_mixers); i++) {
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if ((err = snd_ctl_add(chip->card, snd_ctl_new1(&daca_mixers[i], chip))) < 0)
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return err;
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}
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#ifdef CONFIG_PM
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chip->resume = daca_resume;
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#endif
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return 0;
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}
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