343 lines
9.1 KiB
C
343 lines
9.1 KiB
C
/*
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* ALSA SoC Texas Instruments TPA6130A2 headset stereo amplifier driver
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*
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* Copyright (C) Nokia Corporation
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*
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* Author: Peter Ujfalusi <peter.ujfalusi@ti.com>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* version 2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
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* 02110-1301 USA
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*/
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#include <linux/module.h>
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#include <linux/errno.h>
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#include <linux/device.h>
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#include <linux/i2c.h>
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#include <linux/gpio.h>
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#include <linux/regulator/consumer.h>
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#include <linux/slab.h>
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#include <sound/tpa6130a2-plat.h>
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#include <sound/soc.h>
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#include <sound/tlv.h>
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#include <linux/of.h>
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#include <linux/of_gpio.h>
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#include <linux/regmap.h>
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#include "tpa6130a2.h"
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enum tpa_model {
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TPA6130A2,
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TPA6140A2,
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};
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/* This struct is used to save the context */
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struct tpa6130a2_data {
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struct device *dev;
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struct regmap *regmap;
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struct regulator *supply;
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int power_gpio;
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enum tpa_model id;
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};
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static int tpa6130a2_power(struct tpa6130a2_data *data, bool enable)
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{
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int ret = 0, ret2;
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if (enable) {
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ret = regulator_enable(data->supply);
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if (ret != 0) {
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dev_err(data->dev,
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"Failed to enable supply: %d\n", ret);
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return ret;
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}
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/* Power on */
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if (data->power_gpio >= 0)
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gpio_set_value(data->power_gpio, 1);
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/* Sync registers */
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regcache_cache_only(data->regmap, false);
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ret = regcache_sync(data->regmap);
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if (ret != 0) {
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dev_err(data->dev,
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"Failed to sync registers: %d\n", ret);
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regcache_cache_only(data->regmap, true);
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if (data->power_gpio >= 0)
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gpio_set_value(data->power_gpio, 0);
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ret2 = regulator_disable(data->supply);
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if (ret2 != 0)
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dev_err(data->dev,
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"Failed to disable supply: %d\n", ret2);
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return ret;
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}
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} else {
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/* Powered off device does not retain registers. While device
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* is off, any register updates (i.e. volume changes) should
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* happen in cache only.
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*/
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regcache_mark_dirty(data->regmap);
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regcache_cache_only(data->regmap, true);
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/* Power off */
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if (data->power_gpio >= 0)
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gpio_set_value(data->power_gpio, 0);
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ret = regulator_disable(data->supply);
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if (ret != 0) {
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dev_err(data->dev,
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"Failed to disable supply: %d\n", ret);
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return ret;
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}
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}
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return ret;
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}
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static int tpa6130a2_power_event(struct snd_soc_dapm_widget *w,
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struct snd_kcontrol *kctrl, int event)
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{
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struct snd_soc_component *c = snd_soc_dapm_to_component(w->dapm);
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struct tpa6130a2_data *data = snd_soc_component_get_drvdata(c);
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if (SND_SOC_DAPM_EVENT_ON(event)) {
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/* Before widget power up: turn chip on, sync registers */
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return tpa6130a2_power(data, true);
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} else {
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/* After widget power down: turn chip off */
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return tpa6130a2_power(data, false);
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}
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}
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/*
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* TPA6130 volume. From -59.5 to 4 dB with increasing step size when going
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* down in gain.
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*/
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static const DECLARE_TLV_DB_RANGE(tpa6130_tlv,
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0, 1, TLV_DB_SCALE_ITEM(-5950, 600, 0),
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2, 3, TLV_DB_SCALE_ITEM(-5000, 250, 0),
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4, 5, TLV_DB_SCALE_ITEM(-4550, 160, 0),
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6, 7, TLV_DB_SCALE_ITEM(-4140, 190, 0),
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8, 9, TLV_DB_SCALE_ITEM(-3650, 120, 0),
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10, 11, TLV_DB_SCALE_ITEM(-3330, 160, 0),
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12, 13, TLV_DB_SCALE_ITEM(-3040, 180, 0),
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14, 20, TLV_DB_SCALE_ITEM(-2710, 110, 0),
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21, 37, TLV_DB_SCALE_ITEM(-1960, 74, 0),
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38, 63, TLV_DB_SCALE_ITEM(-720, 45, 0)
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);
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static const struct snd_kcontrol_new tpa6130a2_controls[] = {
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SOC_SINGLE_TLV("Headphone Playback Volume",
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TPA6130A2_REG_VOL_MUTE, 0, 0x3f, 0,
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tpa6130_tlv),
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};
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static const DECLARE_TLV_DB_RANGE(tpa6140_tlv,
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0, 8, TLV_DB_SCALE_ITEM(-5900, 400, 0),
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9, 16, TLV_DB_SCALE_ITEM(-2500, 200, 0),
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17, 31, TLV_DB_SCALE_ITEM(-1000, 100, 0)
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);
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static const struct snd_kcontrol_new tpa6140a2_controls[] = {
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SOC_SINGLE_TLV("Headphone Playback Volume",
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TPA6130A2_REG_VOL_MUTE, 1, 0x1f, 0,
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tpa6140_tlv),
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};
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static int tpa6130a2_component_probe(struct snd_soc_component *component)
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{
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struct tpa6130a2_data *data = snd_soc_component_get_drvdata(component);
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if (data->id == TPA6140A2)
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return snd_soc_add_component_controls(component,
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tpa6140a2_controls, ARRAY_SIZE(tpa6140a2_controls));
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else
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return snd_soc_add_component_controls(component,
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tpa6130a2_controls, ARRAY_SIZE(tpa6130a2_controls));
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}
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static const struct snd_soc_dapm_widget tpa6130a2_dapm_widgets[] = {
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SND_SOC_DAPM_INPUT("LEFTIN"),
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SND_SOC_DAPM_INPUT("RIGHTIN"),
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SND_SOC_DAPM_OUTPUT("HPLEFT"),
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SND_SOC_DAPM_OUTPUT("HPRIGHT"),
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SND_SOC_DAPM_PGA("Left Mute", TPA6130A2_REG_VOL_MUTE,
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TPA6130A2_HP_EN_L_SHIFT, 1, NULL, 0),
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SND_SOC_DAPM_PGA("Right Mute", TPA6130A2_REG_VOL_MUTE,
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TPA6130A2_HP_EN_R_SHIFT, 1, NULL, 0),
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SND_SOC_DAPM_PGA("Left PGA", TPA6130A2_REG_CONTROL,
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TPA6130A2_HP_EN_L_SHIFT, 0, NULL, 0),
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SND_SOC_DAPM_PGA("Right PGA", TPA6130A2_REG_CONTROL,
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TPA6130A2_HP_EN_R_SHIFT, 0, NULL, 0),
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SND_SOC_DAPM_SUPPLY("Power", TPA6130A2_REG_CONTROL,
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TPA6130A2_SWS_SHIFT, 1, tpa6130a2_power_event,
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SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD),
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};
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static const struct snd_soc_dapm_route tpa6130a2_dapm_routes[] = {
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{ "Left PGA", NULL, "LEFTIN" },
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{ "Right PGA", NULL, "RIGHTIN" },
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{ "Left Mute", NULL, "Left PGA" },
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{ "Right Mute", NULL, "Right PGA" },
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{ "HPLEFT", NULL, "Left Mute" },
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{ "HPRIGHT", NULL, "Right Mute" },
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{ "Left PGA", NULL, "Power" },
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{ "Right PGA", NULL, "Power" },
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};
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static const struct snd_soc_component_driver tpa6130a2_component_driver = {
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.name = "tpa6130a2",
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.probe = tpa6130a2_component_probe,
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.dapm_widgets = tpa6130a2_dapm_widgets,
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.num_dapm_widgets = ARRAY_SIZE(tpa6130a2_dapm_widgets),
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.dapm_routes = tpa6130a2_dapm_routes,
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.num_dapm_routes = ARRAY_SIZE(tpa6130a2_dapm_routes),
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};
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static const struct reg_default tpa6130a2_reg_defaults[] = {
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{ TPA6130A2_REG_CONTROL, TPA6130A2_SWS },
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{ TPA6130A2_REG_VOL_MUTE, TPA6130A2_MUTE_R | TPA6130A2_MUTE_L },
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};
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static const struct regmap_config tpa6130a2_regmap_config = {
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.reg_bits = 8,
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.val_bits = 8,
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.max_register = TPA6130A2_REG_VERSION,
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.reg_defaults = tpa6130a2_reg_defaults,
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.num_reg_defaults = ARRAY_SIZE(tpa6130a2_reg_defaults),
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.cache_type = REGCACHE_RBTREE,
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};
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static int tpa6130a2_probe(struct i2c_client *client,
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const struct i2c_device_id *id)
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{
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struct device *dev;
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struct tpa6130a2_data *data;
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struct tpa6130a2_platform_data *pdata = client->dev.platform_data;
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struct device_node *np = client->dev.of_node;
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const char *regulator;
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unsigned int version;
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int ret;
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dev = &client->dev;
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data = devm_kzalloc(&client->dev, sizeof(*data), GFP_KERNEL);
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if (!data)
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return -ENOMEM;
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data->dev = dev;
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data->regmap = devm_regmap_init_i2c(client, &tpa6130a2_regmap_config);
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if (IS_ERR(data->regmap))
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return PTR_ERR(data->regmap);
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if (pdata) {
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data->power_gpio = pdata->power_gpio;
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} else if (np) {
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data->power_gpio = of_get_named_gpio(np, "power-gpio", 0);
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} else {
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dev_err(dev, "Platform data not set\n");
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dump_stack();
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return -ENODEV;
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}
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i2c_set_clientdata(client, data);
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data->id = id->driver_data;
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if (data->power_gpio >= 0) {
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ret = devm_gpio_request(dev, data->power_gpio,
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"tpa6130a2 enable");
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if (ret < 0) {
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dev_err(dev, "Failed to request power GPIO (%d)\n",
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data->power_gpio);
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return ret;
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}
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gpio_direction_output(data->power_gpio, 0);
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}
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switch (data->id) {
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default:
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dev_warn(dev, "Unknown TPA model (%d). Assuming 6130A2\n",
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data->id);
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/* fall through */
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case TPA6130A2:
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regulator = "Vdd";
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break;
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case TPA6140A2:
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regulator = "AVdd";
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break;
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}
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data->supply = devm_regulator_get(dev, regulator);
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if (IS_ERR(data->supply)) {
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ret = PTR_ERR(data->supply);
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dev_err(dev, "Failed to request supply: %d\n", ret);
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return ret;
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}
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ret = tpa6130a2_power(data, true);
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if (ret != 0)
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return ret;
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/* Read version */
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regmap_read(data->regmap, TPA6130A2_REG_VERSION, &version);
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version &= TPA6130A2_VERSION_MASK;
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if ((version != 1) && (version != 2))
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dev_warn(dev, "UNTESTED version detected (%d)\n", version);
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/* Disable the chip */
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ret = tpa6130a2_power(data, false);
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if (ret != 0)
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return ret;
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return devm_snd_soc_register_component(&client->dev,
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&tpa6130a2_component_driver, NULL, 0);
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}
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static const struct i2c_device_id tpa6130a2_id[] = {
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{ "tpa6130a2", TPA6130A2 },
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{ "tpa6140a2", TPA6140A2 },
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{ }
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};
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MODULE_DEVICE_TABLE(i2c, tpa6130a2_id);
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#if IS_ENABLED(CONFIG_OF)
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static const struct of_device_id tpa6130a2_of_match[] = {
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{ .compatible = "ti,tpa6130a2", },
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{ .compatible = "ti,tpa6140a2" },
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{},
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};
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MODULE_DEVICE_TABLE(of, tpa6130a2_of_match);
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#endif
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static struct i2c_driver tpa6130a2_i2c_driver = {
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.driver = {
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.name = "tpa6130a2",
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.of_match_table = of_match_ptr(tpa6130a2_of_match),
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},
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.probe = tpa6130a2_probe,
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.id_table = tpa6130a2_id,
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};
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module_i2c_driver(tpa6130a2_i2c_driver);
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MODULE_AUTHOR("Peter Ujfalusi <peter.ujfalusi@ti.com>");
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MODULE_DESCRIPTION("TPA6130A2 Headphone amplifier driver");
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MODULE_LICENSE("GPL");
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