summaryrefslogtreecommitdiff
path: root/sound/soc/codecs/wm1250-ev1.c
diff options
context:
space:
mode:
Diffstat (limited to 'sound/soc/codecs/wm1250-ev1.c')
-rw-r--r--sound/soc/codecs/wm1250-ev1.c267
1 files changed, 267 insertions, 0 deletions
diff --git a/sound/soc/codecs/wm1250-ev1.c b/sound/soc/codecs/wm1250-ev1.c
new file mode 100644
index 000000000..8011f75fb
--- /dev/null
+++ b/sound/soc/codecs/wm1250-ev1.c
@@ -0,0 +1,267 @@
+/*
+ * Driver for the 1250-EV1 audio I/O module
+ *
+ * Copyright 2011 Wolfson Microelectronics plc
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ *
+ */
+
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/i2c.h>
+#include <linux/gpio.h>
+
+#include <sound/soc.h>
+#include <sound/soc-dapm.h>
+#include <sound/wm1250-ev1.h>
+
+static const char *wm1250_gpio_names[WM1250_EV1_NUM_GPIOS] = {
+ "WM1250 CLK_ENA",
+ "WM1250 CLK_SEL0",
+ "WM1250 CLK_SEL1",
+ "WM1250 OSR",
+ "WM1250 MASTER",
+};
+
+struct wm1250_priv {
+ struct gpio gpios[WM1250_EV1_NUM_GPIOS];
+};
+
+static int wm1250_ev1_set_bias_level(struct snd_soc_codec *codec,
+ enum snd_soc_bias_level level)
+{
+ struct wm1250_priv *wm1250 = dev_get_drvdata(codec->dev);
+ int ena;
+
+ if (wm1250)
+ ena = wm1250->gpios[WM1250_EV1_GPIO_CLK_ENA].gpio;
+ else
+ ena = -1;
+
+ switch (level) {
+ case SND_SOC_BIAS_ON:
+ break;
+
+ case SND_SOC_BIAS_PREPARE:
+ break;
+
+ case SND_SOC_BIAS_STANDBY:
+ if (ena >= 0)
+ gpio_set_value_cansleep(ena, 1);
+ break;
+
+ case SND_SOC_BIAS_OFF:
+ if (ena >= 0)
+ gpio_set_value_cansleep(ena, 0);
+ break;
+ }
+
+ codec->dapm.bias_level = level;
+
+ return 0;
+}
+
+static const struct snd_soc_dapm_widget wm1250_ev1_dapm_widgets[] = {
+SND_SOC_DAPM_ADC("ADC", "wm1250-ev1 Capture", SND_SOC_NOPM, 0, 0),
+SND_SOC_DAPM_DAC("DAC", "wm1250-ev1 Playback", SND_SOC_NOPM, 0, 0),
+
+SND_SOC_DAPM_INPUT("WM1250 Input"),
+SND_SOC_DAPM_OUTPUT("WM1250 Output"),
+};
+
+static const struct snd_soc_dapm_route wm1250_ev1_dapm_routes[] = {
+ { "ADC", NULL, "WM1250 Input" },
+ { "WM1250 Output", NULL, "DAC" },
+};
+
+static int wm1250_ev1_hw_params(struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *params,
+ struct snd_soc_dai *dai)
+{
+ struct wm1250_priv *wm1250 = snd_soc_codec_get_drvdata(dai->codec);
+
+ switch (params_rate(params)) {
+ case 8000:
+ gpio_set_value(wm1250->gpios[WM1250_EV1_GPIO_CLK_SEL0].gpio,
+ 1);
+ gpio_set_value(wm1250->gpios[WM1250_EV1_GPIO_CLK_SEL1].gpio,
+ 1);
+ break;
+ case 16000:
+ gpio_set_value(wm1250->gpios[WM1250_EV1_GPIO_CLK_SEL0].gpio,
+ 0);
+ gpio_set_value(wm1250->gpios[WM1250_EV1_GPIO_CLK_SEL1].gpio,
+ 1);
+ break;
+ case 32000:
+ gpio_set_value(wm1250->gpios[WM1250_EV1_GPIO_CLK_SEL0].gpio,
+ 1);
+ gpio_set_value(wm1250->gpios[WM1250_EV1_GPIO_CLK_SEL1].gpio,
+ 0);
+ break;
+ case 64000:
+ gpio_set_value(wm1250->gpios[WM1250_EV1_GPIO_CLK_SEL0].gpio,
+ 0);
+ gpio_set_value(wm1250->gpios[WM1250_EV1_GPIO_CLK_SEL1].gpio,
+ 0);
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static const struct snd_soc_dai_ops wm1250_ev1_ops = {
+ .hw_params = wm1250_ev1_hw_params,
+};
+
+#define WM1250_EV1_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_16000 |\
+ SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_64000)
+
+static struct snd_soc_dai_driver wm1250_ev1_dai = {
+ .name = "wm1250-ev1",
+ .playback = {
+ .stream_name = "Playback",
+ .channels_min = 1,
+ .channels_max = 2,
+ .rates = WM1250_EV1_RATES,
+ .formats = SNDRV_PCM_FMTBIT_S16_LE,
+ },
+ .capture = {
+ .stream_name = "Capture",
+ .channels_min = 1,
+ .channels_max = 2,
+ .rates = WM1250_EV1_RATES,
+ .formats = SNDRV_PCM_FMTBIT_S16_LE,
+ },
+ .ops = &wm1250_ev1_ops,
+};
+
+static struct snd_soc_codec_driver soc_codec_dev_wm1250_ev1 = {
+ .dapm_widgets = wm1250_ev1_dapm_widgets,
+ .num_dapm_widgets = ARRAY_SIZE(wm1250_ev1_dapm_widgets),
+ .dapm_routes = wm1250_ev1_dapm_routes,
+ .num_dapm_routes = ARRAY_SIZE(wm1250_ev1_dapm_routes),
+
+ .set_bias_level = wm1250_ev1_set_bias_level,
+ .idle_bias_off = true,
+};
+
+static int wm1250_ev1_pdata(struct i2c_client *i2c)
+{
+ struct wm1250_ev1_pdata *pdata = dev_get_platdata(&i2c->dev);
+ struct wm1250_priv *wm1250;
+ int i, ret;
+
+ if (!pdata)
+ return 0;
+
+ wm1250 = devm_kzalloc(&i2c->dev, sizeof(*wm1250), GFP_KERNEL);
+ if (!wm1250) {
+ ret = -ENOMEM;
+ goto err;
+ }
+
+ for (i = 0; i < ARRAY_SIZE(wm1250->gpios); i++) {
+ wm1250->gpios[i].gpio = pdata->gpios[i];
+ wm1250->gpios[i].label = wm1250_gpio_names[i];
+ wm1250->gpios[i].flags = GPIOF_OUT_INIT_LOW;
+ }
+ wm1250->gpios[WM1250_EV1_GPIO_CLK_SEL0].flags = GPIOF_OUT_INIT_HIGH;
+ wm1250->gpios[WM1250_EV1_GPIO_CLK_SEL1].flags = GPIOF_OUT_INIT_HIGH;
+
+ ret = gpio_request_array(wm1250->gpios, ARRAY_SIZE(wm1250->gpios));
+ if (ret != 0) {
+ dev_err(&i2c->dev, "Failed to get GPIOs: %d\n", ret);
+ goto err;
+ }
+
+ dev_set_drvdata(&i2c->dev, wm1250);
+
+ return ret;
+
+err:
+ return ret;
+}
+
+static void wm1250_ev1_free(struct i2c_client *i2c)
+{
+ struct wm1250_priv *wm1250 = dev_get_drvdata(&i2c->dev);
+
+ if (wm1250)
+ gpio_free_array(wm1250->gpios, ARRAY_SIZE(wm1250->gpios));
+}
+
+static int wm1250_ev1_probe(struct i2c_client *i2c,
+ const struct i2c_device_id *i2c_id)
+{
+ int id, board, rev, ret;
+
+ dev_set_drvdata(&i2c->dev, NULL);
+
+ board = i2c_smbus_read_byte_data(i2c, 0);
+ if (board < 0) {
+ dev_err(&i2c->dev, "Failed to read ID: %d\n", board);
+ return board;
+ }
+
+ id = (board & 0xfe) >> 2;
+ rev = board & 0x3;
+
+ if (id != 1) {
+ dev_err(&i2c->dev, "Unknown board ID %d\n", id);
+ return -ENODEV;
+ }
+
+ dev_info(&i2c->dev, "revision %d\n", rev + 1);
+
+ ret = wm1250_ev1_pdata(i2c);
+ if (ret != 0)
+ return ret;
+
+ ret = snd_soc_register_codec(&i2c->dev, &soc_codec_dev_wm1250_ev1,
+ &wm1250_ev1_dai, 1);
+ if (ret != 0) {
+ dev_err(&i2c->dev, "Failed to register CODEC: %d\n", ret);
+ wm1250_ev1_free(i2c);
+ return ret;
+ }
+
+ return 0;
+}
+
+static int wm1250_ev1_remove(struct i2c_client *i2c)
+{
+ snd_soc_unregister_codec(&i2c->dev);
+ wm1250_ev1_free(i2c);
+
+ return 0;
+}
+
+static const struct i2c_device_id wm1250_ev1_i2c_id[] = {
+ { "wm1250-ev1", 0 },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, wm1250_ev1_i2c_id);
+
+static struct i2c_driver wm1250_ev1_i2c_driver = {
+ .driver = {
+ .name = "wm1250-ev1",
+ .owner = THIS_MODULE,
+ },
+ .probe = wm1250_ev1_probe,
+ .remove = wm1250_ev1_remove,
+ .id_table = wm1250_ev1_i2c_id,
+};
+
+module_i2c_driver(wm1250_ev1_i2c_driver);
+
+MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
+MODULE_DESCRIPTION("WM1250-EV1 audio I/O module driver");
+MODULE_LICENSE("GPL");
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-11-05 18:38:07 +0000