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1// SPDX-License-Identifier: GPL-2.0-or-later2/*3 * Driver for the 1250-EV1 audio I/O module4 *5 * Copyright 2011 Wolfson Microelectronics plc6 */7 8#include <linux/init.h>9#include <linux/module.h>10#include <linux/slab.h>11#include <linux/i2c.h>12#include <linux/gpio/consumer.h>13 14#include <sound/soc.h>15#include <sound/soc-dapm.h>16 17struct wm1250_priv {18 struct gpio_desc *clk_ena;19 struct gpio_desc *clk_sel0;20 struct gpio_desc *clk_sel1;21 struct gpio_desc *osr;22 struct gpio_desc *master;23};24 25static int wm1250_ev1_set_bias_level(struct snd_soc_component *component,26 enum snd_soc_bias_level level)27{28 struct wm1250_priv *wm1250 = dev_get_drvdata(component->dev);29 30 switch (level) {31 case SND_SOC_BIAS_ON:32 break;33 34 case SND_SOC_BIAS_PREPARE:35 break;36 37 case SND_SOC_BIAS_STANDBY:38 gpiod_set_value_cansleep(wm1250->clk_ena, 1);39 break;40 41 case SND_SOC_BIAS_OFF:42 gpiod_set_value_cansleep(wm1250->clk_ena, 0);43 break;44 }45 46 return 0;47}48 49static const struct snd_soc_dapm_widget wm1250_ev1_dapm_widgets[] = {50SND_SOC_DAPM_ADC("ADC", "wm1250-ev1 Capture", SND_SOC_NOPM, 0, 0),51SND_SOC_DAPM_DAC("DAC", "wm1250-ev1 Playback", SND_SOC_NOPM, 0, 0),52 53SND_SOC_DAPM_INPUT("WM1250 Input"),54SND_SOC_DAPM_OUTPUT("WM1250 Output"),55};56 57static const struct snd_soc_dapm_route wm1250_ev1_dapm_routes[] = {58 { "ADC", NULL, "WM1250 Input" },59 { "WM1250 Output", NULL, "DAC" },60};61 62static int wm1250_ev1_hw_params(struct snd_pcm_substream *substream,63 struct snd_pcm_hw_params *params,64 struct snd_soc_dai *dai)65{66 struct wm1250_priv *wm1250 = snd_soc_component_get_drvdata(dai->component);67 68 switch (params_rate(params)) {69 case 8000:70 gpiod_set_value(wm1250->clk_sel0, 1);71 gpiod_set_value(wm1250->clk_sel1, 1);72 break;73 case 16000:74 gpiod_set_value(wm1250->clk_sel0, 0);75 gpiod_set_value(wm1250->clk_sel1, 1);76 break;77 case 32000:78 gpiod_set_value(wm1250->clk_sel0, 1);79 gpiod_set_value(wm1250->clk_sel1, 0);80 break;81 case 64000:82 gpiod_set_value(wm1250->clk_sel0, 0);83 gpiod_set_value(wm1250->clk_sel1, 0);84 break;85 default:86 return -EINVAL;87 }88 89 return 0;90}91 92static const struct snd_soc_dai_ops wm1250_ev1_ops = {93 .hw_params = wm1250_ev1_hw_params,94};95 96#define WM1250_EV1_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_16000 |\97 SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_64000)98 99static struct snd_soc_dai_driver wm1250_ev1_dai = {100 .name = "wm1250-ev1",101 .playback = {102 .stream_name = "Playback",103 .channels_min = 1,104 .channels_max = 2,105 .rates = WM1250_EV1_RATES,106 .formats = SNDRV_PCM_FMTBIT_S16_LE,107 },108 .capture = {109 .stream_name = "Capture",110 .channels_min = 1,111 .channels_max = 2,112 .rates = WM1250_EV1_RATES,113 .formats = SNDRV_PCM_FMTBIT_S16_LE,114 },115 .ops = &wm1250_ev1_ops,116};117 118static const struct snd_soc_component_driver soc_component_dev_wm1250_ev1 = {119 .dapm_widgets = wm1250_ev1_dapm_widgets,120 .num_dapm_widgets = ARRAY_SIZE(wm1250_ev1_dapm_widgets),121 .dapm_routes = wm1250_ev1_dapm_routes,122 .num_dapm_routes = ARRAY_SIZE(wm1250_ev1_dapm_routes),123 .set_bias_level = wm1250_ev1_set_bias_level,124 .use_pmdown_time = 1,125 .endianness = 1,126};127 128static int wm1250_ev1_pdata(struct i2c_client *i2c)129{130 struct wm1250_ev1_pdata *pdata = dev_get_platdata(&i2c->dev);131 struct wm1250_priv *wm1250;132 133 if (!pdata)134 return 0;135 136 wm1250 = devm_kzalloc(&i2c->dev, sizeof(*wm1250), GFP_KERNEL);137 if (!wm1250)138 return -ENOMEM;139 140 wm1250->clk_ena = devm_gpiod_get(&i2c->dev, "clk-ena", GPIOD_OUT_LOW);141 if (IS_ERR(wm1250->clk_ena))142 return dev_err_probe(&i2c->dev, PTR_ERR(wm1250->clk_ena),143 "failed to get clock enable GPIO\n");144 145 wm1250->clk_sel0 = devm_gpiod_get(&i2c->dev, "clk-sel0", GPIOD_OUT_HIGH);146 if (IS_ERR(wm1250->clk_sel0))147 return dev_err_probe(&i2c->dev, PTR_ERR(wm1250->clk_sel0),148 "failed to get clock sel0 GPIO\n");149 150 wm1250->clk_sel1 = devm_gpiod_get(&i2c->dev, "clk-sel1", GPIOD_OUT_HIGH);151 if (IS_ERR(wm1250->clk_sel1))152 return dev_err_probe(&i2c->dev, PTR_ERR(wm1250->clk_sel1),153 "failed to get clock sel1 GPIO\n");154 155 wm1250->osr = devm_gpiod_get(&i2c->dev, "osr", GPIOD_OUT_LOW);156 if (IS_ERR(wm1250->osr))157 return dev_err_probe(&i2c->dev, PTR_ERR(wm1250->osr),158 "failed to get OSR GPIO\n");159 160 wm1250->master = devm_gpiod_get(&i2c->dev, "master", GPIOD_OUT_LOW);161 if (IS_ERR(wm1250->master))162 return dev_err_probe(&i2c->dev, PTR_ERR(wm1250->master),163 "failed to get MASTER GPIO\n");164 165 dev_set_drvdata(&i2c->dev, wm1250);166 167 return 0;168}169 170static int wm1250_ev1_probe(struct i2c_client *i2c)171{172 int id, board, rev, ret;173 174 dev_set_drvdata(&i2c->dev, NULL);175 176 board = i2c_smbus_read_byte_data(i2c, 0);177 if (board < 0) {178 dev_err(&i2c->dev, "Failed to read ID: %d\n", board);179 return board;180 }181 182 id = (board & 0xfe) >> 2;183 rev = board & 0x3;184 185 if (id != 1) {186 dev_err(&i2c->dev, "Unknown board ID %d\n", id);187 return -ENODEV;188 }189 190 dev_info(&i2c->dev, "revision %d\n", rev + 1);191 192 ret = wm1250_ev1_pdata(i2c);193 if (ret != 0)194 return ret;195 196 ret = devm_snd_soc_register_component(&i2c->dev, &soc_component_dev_wm1250_ev1,197 &wm1250_ev1_dai, 1);198 if (ret != 0) {199 dev_err(&i2c->dev, "Failed to register CODEC: %d\n", ret);200 return ret;201 }202 203 return 0;204}205 206static const struct i2c_device_id wm1250_ev1_i2c_id[] = {207 { "wm1250-ev1" },208 { }209};210MODULE_DEVICE_TABLE(i2c, wm1250_ev1_i2c_id);211 212static struct i2c_driver wm1250_ev1_i2c_driver = {213 .driver = {214 .name = "wm1250-ev1",215 },216 .probe = wm1250_ev1_probe,217 .id_table = wm1250_ev1_i2c_id,218};219 220module_i2c_driver(wm1250_ev1_i2c_driver);221 222MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");223MODULE_DESCRIPTION("WM1250-EV1 audio I/O module driver");224MODULE_LICENSE("GPL");225