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1// SPDX-License-Identifier: GPL-2.0-only2/*3 * Pistachio internal dac driver4 *5 * Copyright (C) 2015 Imagination Technologies Ltd.6 *7 * Author: Damien Horsley <Damien.Horsley@imgtec.com>8 */9 10#include <linux/clk.h>11#include <linux/delay.h>12#include <linux/mfd/syscon.h>13#include <linux/module.h>14#include <linux/pm_runtime.h>15#include <linux/regmap.h>16#include <linux/regulator/consumer.h>17 18#include <sound/pcm_params.h>19#include <sound/soc.h>20 21#define PISTACHIO_INTERNAL_DAC_CTRL 0x4022#define PISTACHIO_INTERNAL_DAC_CTRL_PWR_SEL_MASK 0x223#define PISTACHIO_INTERNAL_DAC_CTRL_PWRDN_MASK 0x124 25#define PISTACHIO_INTERNAL_DAC_SRST 0x4426#define PISTACHIO_INTERNAL_DAC_SRST_MASK 0x127 28#define PISTACHIO_INTERNAL_DAC_GTI_CTRL 0x4829#define PISTACHIO_INTERNAL_DAC_GTI_CTRL_ADDR_SHIFT 030#define PISTACHIO_INTERNAL_DAC_GTI_CTRL_ADDR_MASK 0xFFF31#define PISTACHIO_INTERNAL_DAC_GTI_CTRL_WE_MASK 0x100032#define PISTACHIO_INTERNAL_DAC_GTI_CTRL_WDATA_SHIFT 1333#define PISTACHIO_INTERNAL_DAC_GTI_CTRL_WDATA_MASK 0x1FE00034 35#define PISTACHIO_INTERNAL_DAC_PWR 0x136#define PISTACHIO_INTERNAL_DAC_PWR_MASK 0x137 38#define PISTACHIO_INTERNAL_DAC_FORMATS (SNDRV_PCM_FMTBIT_S24_LE | \39 SNDRV_PCM_FMTBIT_S32_LE)40 41/* codec private data */42struct pistachio_internal_dac {43 struct regmap *regmap;44 struct regulator *supply;45 bool mute;46};47 48static const struct snd_kcontrol_new pistachio_internal_dac_snd_controls[] = {49 SOC_SINGLE("Playback Switch", PISTACHIO_INTERNAL_DAC_CTRL, 2, 1, 1)50};51 52static const struct snd_soc_dapm_widget pistachio_internal_dac_widgets[] = {53 SND_SOC_DAPM_DAC("DAC", "Playback", SND_SOC_NOPM, 0, 0),54 SND_SOC_DAPM_OUTPUT("AOUTL"),55 SND_SOC_DAPM_OUTPUT("AOUTR"),56};57 58static const struct snd_soc_dapm_route pistachio_internal_dac_routes[] = {59 { "AOUTL", NULL, "DAC" },60 { "AOUTR", NULL, "DAC" },61};62 63static void pistachio_internal_dac_reg_writel(struct regmap *top_regs,64 u32 val, u32 reg)65{66 regmap_update_bits(top_regs, PISTACHIO_INTERNAL_DAC_GTI_CTRL,67 PISTACHIO_INTERNAL_DAC_GTI_CTRL_ADDR_MASK,68 reg << PISTACHIO_INTERNAL_DAC_GTI_CTRL_ADDR_SHIFT);69 70 regmap_update_bits(top_regs, PISTACHIO_INTERNAL_DAC_GTI_CTRL,71 PISTACHIO_INTERNAL_DAC_GTI_CTRL_WDATA_MASK,72 val << PISTACHIO_INTERNAL_DAC_GTI_CTRL_WDATA_SHIFT);73 74 regmap_update_bits(top_regs, PISTACHIO_INTERNAL_DAC_GTI_CTRL,75 PISTACHIO_INTERNAL_DAC_GTI_CTRL_WE_MASK,76 PISTACHIO_INTERNAL_DAC_GTI_CTRL_WE_MASK);77 78 regmap_update_bits(top_regs, PISTACHIO_INTERNAL_DAC_GTI_CTRL,79 PISTACHIO_INTERNAL_DAC_GTI_CTRL_WE_MASK, 0);80}81 82static void pistachio_internal_dac_pwr_off(struct pistachio_internal_dac *dac)83{84 regmap_update_bits(dac->regmap, PISTACHIO_INTERNAL_DAC_CTRL,85 PISTACHIO_INTERNAL_DAC_CTRL_PWRDN_MASK,86 PISTACHIO_INTERNAL_DAC_CTRL_PWRDN_MASK);87 88 pistachio_internal_dac_reg_writel(dac->regmap, 0,89 PISTACHIO_INTERNAL_DAC_PWR);90}91 92static void pistachio_internal_dac_pwr_on(struct pistachio_internal_dac *dac)93{94 regmap_update_bits(dac->regmap, PISTACHIO_INTERNAL_DAC_SRST,95 PISTACHIO_INTERNAL_DAC_SRST_MASK,96 PISTACHIO_INTERNAL_DAC_SRST_MASK);97 98 regmap_update_bits(dac->regmap, PISTACHIO_INTERNAL_DAC_SRST,99 PISTACHIO_INTERNAL_DAC_SRST_MASK, 0);100 101 pistachio_internal_dac_reg_writel(dac->regmap,102 PISTACHIO_INTERNAL_DAC_PWR_MASK,103 PISTACHIO_INTERNAL_DAC_PWR);104 105 regmap_update_bits(dac->regmap, PISTACHIO_INTERNAL_DAC_CTRL,106 PISTACHIO_INTERNAL_DAC_CTRL_PWRDN_MASK, 0);107}108 109static struct snd_soc_dai_driver pistachio_internal_dac_dais[] = {110 {111 .name = "pistachio_internal_dac",112 .playback = {113 .stream_name = "Playback",114 .channels_min = 2,115 .channels_max = 2,116 .rates = SNDRV_PCM_RATE_8000_48000,117 .formats = PISTACHIO_INTERNAL_DAC_FORMATS,118 }119 },120};121 122static int pistachio_internal_dac_codec_probe(struct snd_soc_component *component)123{124 struct pistachio_internal_dac *dac = snd_soc_component_get_drvdata(component);125 126 snd_soc_component_init_regmap(component, dac->regmap);127 128 return 0;129}130 131static const struct snd_soc_component_driver pistachio_internal_dac_driver = {132 .probe = pistachio_internal_dac_codec_probe,133 .controls = pistachio_internal_dac_snd_controls,134 .num_controls = ARRAY_SIZE(pistachio_internal_dac_snd_controls),135 .dapm_widgets = pistachio_internal_dac_widgets,136 .num_dapm_widgets = ARRAY_SIZE(pistachio_internal_dac_widgets),137 .dapm_routes = pistachio_internal_dac_routes,138 .num_dapm_routes = ARRAY_SIZE(pistachio_internal_dac_routes),139 .use_pmdown_time = 1,140 .endianness = 1,141};142 143static int pistachio_internal_dac_probe(struct platform_device *pdev)144{145 struct pistachio_internal_dac *dac;146 int ret, voltage;147 struct device *dev = &pdev->dev;148 u32 reg;149 150 dac = devm_kzalloc(dev, sizeof(*dac), GFP_KERNEL);151 152 if (!dac)153 return -ENOMEM;154 155 platform_set_drvdata(pdev, dac);156 157 dac->regmap = syscon_regmap_lookup_by_phandle(pdev->dev.of_node,158 "img,cr-top");159 if (IS_ERR(dac->regmap))160 return PTR_ERR(dac->regmap);161 162 dac->supply = devm_regulator_get(dev, "VDD");163 if (IS_ERR(dac->supply))164 return dev_err_probe(dev, PTR_ERR(dac->supply),165 "failed to acquire supply 'VDD-supply'\n");166 167 ret = regulator_enable(dac->supply);168 if (ret) {169 dev_err(dev, "failed to enable supply: %d\n", ret);170 return ret;171 }172 173 voltage = regulator_get_voltage(dac->supply);174 175 switch (voltage) {176 case 1800000:177 reg = 0;178 break;179 case 3300000:180 reg = PISTACHIO_INTERNAL_DAC_CTRL_PWR_SEL_MASK;181 break;182 default:183 dev_err(dev, "invalid voltage: %d\n", voltage);184 ret = -EINVAL;185 goto err_regulator;186 }187 188 regmap_update_bits(dac->regmap, PISTACHIO_INTERNAL_DAC_CTRL,189 PISTACHIO_INTERNAL_DAC_CTRL_PWR_SEL_MASK, reg);190 191 pistachio_internal_dac_pwr_off(dac);192 pistachio_internal_dac_pwr_on(dac);193 194 pm_runtime_set_active(dev);195 pm_runtime_enable(dev);196 pm_runtime_idle(dev);197 198 ret = devm_snd_soc_register_component(dev,199 &pistachio_internal_dac_driver,200 pistachio_internal_dac_dais,201 ARRAY_SIZE(pistachio_internal_dac_dais));202 if (ret) {203 dev_err(dev, "failed to register component: %d\n", ret);204 goto err_pwr;205 }206 207 return 0;208 209err_pwr:210 pm_runtime_disable(&pdev->dev);211 pistachio_internal_dac_pwr_off(dac);212err_regulator:213 regulator_disable(dac->supply);214 215 return ret;216}217 218static void pistachio_internal_dac_remove(struct platform_device *pdev)219{220 struct pistachio_internal_dac *dac = dev_get_drvdata(&pdev->dev);221 222 pm_runtime_disable(&pdev->dev);223 pistachio_internal_dac_pwr_off(dac);224 regulator_disable(dac->supply);225}226 227#ifdef CONFIG_PM228static int pistachio_internal_dac_rt_resume(struct device *dev)229{230 struct pistachio_internal_dac *dac = dev_get_drvdata(dev);231 int ret;232 233 ret = regulator_enable(dac->supply);234 if (ret) {235 dev_err(dev, "failed to enable supply: %d\n", ret);236 return ret;237 }238 239 pistachio_internal_dac_pwr_on(dac);240 241 return 0;242}243 244static int pistachio_internal_dac_rt_suspend(struct device *dev)245{246 struct pistachio_internal_dac *dac = dev_get_drvdata(dev);247 248 pistachio_internal_dac_pwr_off(dac);249 250 regulator_disable(dac->supply);251 252 return 0;253}254#endif255 256static const struct dev_pm_ops pistachio_internal_dac_pm_ops = {257 SET_RUNTIME_PM_OPS(pistachio_internal_dac_rt_suspend,258 pistachio_internal_dac_rt_resume, NULL)259};260 261static const struct of_device_id pistachio_internal_dac_of_match[] = {262 { .compatible = "img,pistachio-internal-dac" },263 {}264};265MODULE_DEVICE_TABLE(of, pistachio_internal_dac_of_match);266 267static struct platform_driver pistachio_internal_dac_plat_driver = {268 .driver = {269 .name = "img-pistachio-internal-dac",270 .of_match_table = pistachio_internal_dac_of_match,271 .pm = &pistachio_internal_dac_pm_ops272 },273 .probe = pistachio_internal_dac_probe,274 .remove = pistachio_internal_dac_remove275};276module_platform_driver(pistachio_internal_dac_plat_driver);277 278MODULE_DESCRIPTION("Pistachio Internal DAC driver");279MODULE_AUTHOR("Damien Horsley <Damien.Horsley@imgtec.com>");280MODULE_LICENSE("GPL v2");281