1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * Driver for the 1250-EV1 audio I/O module
5 * Copyright 2011 Wolfson Microelectronics plc
8 #include <linux/init.h>
9 #include <linux/module.h>
10 #include <linux/slab.h>
11 #include <linux/i2c.h>
12 #include <linux/gpio.h>
14 #include <sound/soc.h>
15 #include <sound/soc-dapm.h>
16 #include <sound/wm1250-ev1.h>
18 static const char *wm1250_gpio_names[WM1250_EV1_NUM_GPIOS] = {
27 struct gpio gpios[WM1250_EV1_NUM_GPIOS];
30 static int wm1250_ev1_set_bias_level(struct snd_soc_component *component,
31 enum snd_soc_bias_level level)
33 struct wm1250_priv *wm1250 = dev_get_drvdata(component->dev);
37 ena = wm1250->gpios[WM1250_EV1_GPIO_CLK_ENA].gpio;
45 case SND_SOC_BIAS_PREPARE:
48 case SND_SOC_BIAS_STANDBY:
50 gpio_set_value_cansleep(ena, 1);
53 case SND_SOC_BIAS_OFF:
55 gpio_set_value_cansleep(ena, 0);
62 static const struct snd_soc_dapm_widget wm1250_ev1_dapm_widgets[] = {
63 SND_SOC_DAPM_ADC("ADC", "wm1250-ev1 Capture", SND_SOC_NOPM, 0, 0),
64 SND_SOC_DAPM_DAC("DAC", "wm1250-ev1 Playback", SND_SOC_NOPM, 0, 0),
66 SND_SOC_DAPM_INPUT("WM1250 Input"),
67 SND_SOC_DAPM_OUTPUT("WM1250 Output"),
70 static const struct snd_soc_dapm_route wm1250_ev1_dapm_routes[] = {
71 { "ADC", NULL, "WM1250 Input" },
72 { "WM1250 Output", NULL, "DAC" },
75 static int wm1250_ev1_hw_params(struct snd_pcm_substream *substream,
76 struct snd_pcm_hw_params *params,
77 struct snd_soc_dai *dai)
79 struct wm1250_priv *wm1250 = snd_soc_component_get_drvdata(dai->component);
81 switch (params_rate(params)) {
83 gpio_set_value(wm1250->gpios[WM1250_EV1_GPIO_CLK_SEL0].gpio,
85 gpio_set_value(wm1250->gpios[WM1250_EV1_GPIO_CLK_SEL1].gpio,
89 gpio_set_value(wm1250->gpios[WM1250_EV1_GPIO_CLK_SEL0].gpio,
91 gpio_set_value(wm1250->gpios[WM1250_EV1_GPIO_CLK_SEL1].gpio,
95 gpio_set_value(wm1250->gpios[WM1250_EV1_GPIO_CLK_SEL0].gpio,
97 gpio_set_value(wm1250->gpios[WM1250_EV1_GPIO_CLK_SEL1].gpio,
101 gpio_set_value(wm1250->gpios[WM1250_EV1_GPIO_CLK_SEL0].gpio,
103 gpio_set_value(wm1250->gpios[WM1250_EV1_GPIO_CLK_SEL1].gpio,
113 static const struct snd_soc_dai_ops wm1250_ev1_ops = {
114 .hw_params = wm1250_ev1_hw_params,
117 #define WM1250_EV1_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_16000 |\
118 SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_64000)
120 static struct snd_soc_dai_driver wm1250_ev1_dai = {
121 .name = "wm1250-ev1",
123 .stream_name = "Playback",
126 .rates = WM1250_EV1_RATES,
127 .formats = SNDRV_PCM_FMTBIT_S16_LE,
130 .stream_name = "Capture",
133 .rates = WM1250_EV1_RATES,
134 .formats = SNDRV_PCM_FMTBIT_S16_LE,
136 .ops = &wm1250_ev1_ops,
139 static const struct snd_soc_component_driver soc_component_dev_wm1250_ev1 = {
140 .dapm_widgets = wm1250_ev1_dapm_widgets,
141 .num_dapm_widgets = ARRAY_SIZE(wm1250_ev1_dapm_widgets),
142 .dapm_routes = wm1250_ev1_dapm_routes,
143 .num_dapm_routes = ARRAY_SIZE(wm1250_ev1_dapm_routes),
144 .set_bias_level = wm1250_ev1_set_bias_level,
145 .use_pmdown_time = 1,
147 .non_legacy_dai_naming = 1,
150 static int wm1250_ev1_pdata(struct i2c_client *i2c)
152 struct wm1250_ev1_pdata *pdata = dev_get_platdata(&i2c->dev);
153 struct wm1250_priv *wm1250;
159 wm1250 = devm_kzalloc(&i2c->dev, sizeof(*wm1250), GFP_KERNEL);
165 for (i = 0; i < ARRAY_SIZE(wm1250->gpios); i++) {
166 wm1250->gpios[i].gpio = pdata->gpios[i];
167 wm1250->gpios[i].label = wm1250_gpio_names[i];
168 wm1250->gpios[i].flags = GPIOF_OUT_INIT_LOW;
170 wm1250->gpios[WM1250_EV1_GPIO_CLK_SEL0].flags = GPIOF_OUT_INIT_HIGH;
171 wm1250->gpios[WM1250_EV1_GPIO_CLK_SEL1].flags = GPIOF_OUT_INIT_HIGH;
173 ret = gpio_request_array(wm1250->gpios, ARRAY_SIZE(wm1250->gpios));
175 dev_err(&i2c->dev, "Failed to get GPIOs: %d\n", ret);
179 dev_set_drvdata(&i2c->dev, wm1250);
187 static void wm1250_ev1_free(struct i2c_client *i2c)
189 struct wm1250_priv *wm1250 = dev_get_drvdata(&i2c->dev);
192 gpio_free_array(wm1250->gpios, ARRAY_SIZE(wm1250->gpios));
195 static int wm1250_ev1_probe(struct i2c_client *i2c,
196 const struct i2c_device_id *i2c_id)
198 int id, board, rev, ret;
200 dev_set_drvdata(&i2c->dev, NULL);
202 board = i2c_smbus_read_byte_data(i2c, 0);
204 dev_err(&i2c->dev, "Failed to read ID: %d\n", board);
208 id = (board & 0xfe) >> 2;
212 dev_err(&i2c->dev, "Unknown board ID %d\n", id);
216 dev_info(&i2c->dev, "revision %d\n", rev + 1);
218 ret = wm1250_ev1_pdata(i2c);
222 ret = devm_snd_soc_register_component(&i2c->dev, &soc_component_dev_wm1250_ev1,
225 dev_err(&i2c->dev, "Failed to register CODEC: %d\n", ret);
226 wm1250_ev1_free(i2c);
233 static int wm1250_ev1_remove(struct i2c_client *i2c)
235 wm1250_ev1_free(i2c);
240 static const struct i2c_device_id wm1250_ev1_i2c_id[] = {
244 MODULE_DEVICE_TABLE(i2c, wm1250_ev1_i2c_id);
246 static struct i2c_driver wm1250_ev1_i2c_driver = {
248 .name = "wm1250-ev1",
250 .probe = wm1250_ev1_probe,
251 .remove = wm1250_ev1_remove,
252 .id_table = wm1250_ev1_i2c_id,
255 module_i2c_driver(wm1250_ev1_i2c_driver);
257 MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
258 MODULE_DESCRIPTION("WM1250-EV1 audio I/O module driver");
259 MODULE_LICENSE("GPL");