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257 lines
5.8 KiB
257 lines
5.8 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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* Driver for the 1250-EV1 audio I/O module |
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* |
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* Copyright 2011 Wolfson Microelectronics plc |
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*/ |
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#include <linux/init.h> |
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#include <linux/module.h> |
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#include <linux/slab.h> |
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#include <linux/i2c.h> |
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#include <linux/gpio.h> |
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#include <sound/soc.h> |
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#include <sound/soc-dapm.h> |
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#include <sound/wm1250-ev1.h> |
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static const char *wm1250_gpio_names[WM1250_EV1_NUM_GPIOS] = { |
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"WM1250 CLK_ENA", |
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"WM1250 CLK_SEL0", |
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"WM1250 CLK_SEL1", |
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"WM1250 OSR", |
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"WM1250 MASTER", |
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}; |
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struct wm1250_priv { |
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struct gpio gpios[WM1250_EV1_NUM_GPIOS]; |
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}; |
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static int wm1250_ev1_set_bias_level(struct snd_soc_component *component, |
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enum snd_soc_bias_level level) |
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{ |
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struct wm1250_priv *wm1250 = dev_get_drvdata(component->dev); |
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int ena; |
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if (wm1250) |
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ena = wm1250->gpios[WM1250_EV1_GPIO_CLK_ENA].gpio; |
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else |
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ena = -1; |
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switch (level) { |
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case SND_SOC_BIAS_ON: |
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break; |
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case SND_SOC_BIAS_PREPARE: |
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break; |
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case SND_SOC_BIAS_STANDBY: |
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if (ena >= 0) |
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gpio_set_value_cansleep(ena, 1); |
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break; |
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case SND_SOC_BIAS_OFF: |
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if (ena >= 0) |
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gpio_set_value_cansleep(ena, 0); |
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break; |
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} |
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return 0; |
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} |
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static const struct snd_soc_dapm_widget wm1250_ev1_dapm_widgets[] = { |
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SND_SOC_DAPM_ADC("ADC", "wm1250-ev1 Capture", SND_SOC_NOPM, 0, 0), |
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SND_SOC_DAPM_DAC("DAC", "wm1250-ev1 Playback", SND_SOC_NOPM, 0, 0), |
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SND_SOC_DAPM_INPUT("WM1250 Input"), |
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SND_SOC_DAPM_OUTPUT("WM1250 Output"), |
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}; |
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static const struct snd_soc_dapm_route wm1250_ev1_dapm_routes[] = { |
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{ "ADC", NULL, "WM1250 Input" }, |
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{ "WM1250 Output", NULL, "DAC" }, |
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}; |
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static int wm1250_ev1_hw_params(struct snd_pcm_substream *substream, |
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struct snd_pcm_hw_params *params, |
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struct snd_soc_dai *dai) |
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{ |
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struct wm1250_priv *wm1250 = snd_soc_component_get_drvdata(dai->component); |
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switch (params_rate(params)) { |
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case 8000: |
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gpio_set_value(wm1250->gpios[WM1250_EV1_GPIO_CLK_SEL0].gpio, |
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1); |
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gpio_set_value(wm1250->gpios[WM1250_EV1_GPIO_CLK_SEL1].gpio, |
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1); |
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break; |
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case 16000: |
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gpio_set_value(wm1250->gpios[WM1250_EV1_GPIO_CLK_SEL0].gpio, |
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0); |
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gpio_set_value(wm1250->gpios[WM1250_EV1_GPIO_CLK_SEL1].gpio, |
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1); |
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break; |
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case 32000: |
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gpio_set_value(wm1250->gpios[WM1250_EV1_GPIO_CLK_SEL0].gpio, |
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1); |
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gpio_set_value(wm1250->gpios[WM1250_EV1_GPIO_CLK_SEL1].gpio, |
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0); |
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break; |
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case 64000: |
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gpio_set_value(wm1250->gpios[WM1250_EV1_GPIO_CLK_SEL0].gpio, |
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0); |
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gpio_set_value(wm1250->gpios[WM1250_EV1_GPIO_CLK_SEL1].gpio, |
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0); |
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break; |
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default: |
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return -EINVAL; |
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} |
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return 0; |
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} |
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static const struct snd_soc_dai_ops wm1250_ev1_ops = { |
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.hw_params = wm1250_ev1_hw_params, |
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}; |
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#define WM1250_EV1_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_16000 |\ |
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SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_64000) |
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static struct snd_soc_dai_driver wm1250_ev1_dai = { |
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.name = "wm1250-ev1", |
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.playback = { |
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.stream_name = "Playback", |
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.channels_min = 1, |
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.channels_max = 2, |
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.rates = WM1250_EV1_RATES, |
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.formats = SNDRV_PCM_FMTBIT_S16_LE, |
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}, |
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.capture = { |
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.stream_name = "Capture", |
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.channels_min = 1, |
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.channels_max = 2, |
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.rates = WM1250_EV1_RATES, |
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.formats = SNDRV_PCM_FMTBIT_S16_LE, |
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}, |
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.ops = &wm1250_ev1_ops, |
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}; |
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static const struct snd_soc_component_driver soc_component_dev_wm1250_ev1 = { |
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.dapm_widgets = wm1250_ev1_dapm_widgets, |
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.num_dapm_widgets = ARRAY_SIZE(wm1250_ev1_dapm_widgets), |
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.dapm_routes = wm1250_ev1_dapm_routes, |
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.num_dapm_routes = ARRAY_SIZE(wm1250_ev1_dapm_routes), |
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.set_bias_level = wm1250_ev1_set_bias_level, |
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.use_pmdown_time = 1, |
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.endianness = 1, |
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}; |
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static int wm1250_ev1_pdata(struct i2c_client *i2c) |
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{ |
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struct wm1250_ev1_pdata *pdata = dev_get_platdata(&i2c->dev); |
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struct wm1250_priv *wm1250; |
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int i, ret; |
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if (!pdata) |
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return 0; |
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wm1250 = devm_kzalloc(&i2c->dev, sizeof(*wm1250), GFP_KERNEL); |
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if (!wm1250) { |
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ret = -ENOMEM; |
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goto err; |
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} |
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for (i = 0; i < ARRAY_SIZE(wm1250->gpios); i++) { |
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wm1250->gpios[i].gpio = pdata->gpios[i]; |
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wm1250->gpios[i].label = wm1250_gpio_names[i]; |
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wm1250->gpios[i].flags = GPIOF_OUT_INIT_LOW; |
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} |
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wm1250->gpios[WM1250_EV1_GPIO_CLK_SEL0].flags = GPIOF_OUT_INIT_HIGH; |
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wm1250->gpios[WM1250_EV1_GPIO_CLK_SEL1].flags = GPIOF_OUT_INIT_HIGH; |
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ret = gpio_request_array(wm1250->gpios, ARRAY_SIZE(wm1250->gpios)); |
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if (ret != 0) { |
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dev_err(&i2c->dev, "Failed to get GPIOs: %d\n", ret); |
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goto err; |
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} |
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dev_set_drvdata(&i2c->dev, wm1250); |
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return ret; |
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err: |
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return ret; |
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} |
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static void wm1250_ev1_free(struct i2c_client *i2c) |
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{ |
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struct wm1250_priv *wm1250 = dev_get_drvdata(&i2c->dev); |
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if (wm1250) |
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gpio_free_array(wm1250->gpios, ARRAY_SIZE(wm1250->gpios)); |
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} |
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static int wm1250_ev1_probe(struct i2c_client *i2c) |
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{ |
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int id, board, rev, ret; |
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dev_set_drvdata(&i2c->dev, NULL); |
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board = i2c_smbus_read_byte_data(i2c, 0); |
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if (board < 0) { |
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dev_err(&i2c->dev, "Failed to read ID: %d\n", board); |
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return board; |
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} |
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id = (board & 0xfe) >> 2; |
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rev = board & 0x3; |
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if (id != 1) { |
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dev_err(&i2c->dev, "Unknown board ID %d\n", id); |
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return -ENODEV; |
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} |
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dev_info(&i2c->dev, "revision %d\n", rev + 1); |
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ret = wm1250_ev1_pdata(i2c); |
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if (ret != 0) |
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return ret; |
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ret = devm_snd_soc_register_component(&i2c->dev, &soc_component_dev_wm1250_ev1, |
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&wm1250_ev1_dai, 1); |
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if (ret != 0) { |
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dev_err(&i2c->dev, "Failed to register CODEC: %d\n", ret); |
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wm1250_ev1_free(i2c); |
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return ret; |
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} |
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return 0; |
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} |
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static int wm1250_ev1_remove(struct i2c_client *i2c) |
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{ |
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wm1250_ev1_free(i2c); |
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return 0; |
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} |
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static const struct i2c_device_id wm1250_ev1_i2c_id[] = { |
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{ "wm1250-ev1", 0 }, |
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{ } |
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}; |
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MODULE_DEVICE_TABLE(i2c, wm1250_ev1_i2c_id); |
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static struct i2c_driver wm1250_ev1_i2c_driver = { |
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.driver = { |
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.name = "wm1250-ev1", |
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}, |
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.probe_new = wm1250_ev1_probe, |
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.remove = wm1250_ev1_remove, |
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.id_table = wm1250_ev1_i2c_id, |
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}; |
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module_i2c_driver(wm1250_ev1_i2c_driver); |
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MODULE_AUTHOR("Mark Brown <[email protected]>"); |
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MODULE_DESCRIPTION("WM1250-EV1 audio I/O module driver"); |
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MODULE_LICENSE("GPL");
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