// SPDX-License-Identifier: GPL-2.0
/*
- * Driver for ChromeOS Embedded Controller codec.
+ * Copyright 2019 Google, Inc.
+ *
+ * ChromeOS Embedded Controller codec driver.
*
* This driver uses the cros-ec interface to communicate with the ChromeOS
* EC for audio function.
#include <sound/soc.h>
#include <sound/tlv.h>
-#define DRV_NAME "cros-ec-codec"
-
-/**
- * struct cros_ec_codec_data - ChromeOS EC codec driver data.
- * @dev: Device structure used in sysfs.
- * @ec_device: cros_ec_device structure to talk to the physical device.
- * @component: Pointer to the component.
- * @max_dmic_gain: Maximum gain in dB supported by EC codec.
- */
-struct cros_ec_codec_data {
+struct cros_ec_codec_priv {
struct device *dev;
struct cros_ec_device *ec_device;
- struct snd_soc_component *component;
- unsigned int max_dmic_gain;
};
-static const DECLARE_TLV_DB_SCALE(ec_mic_gain_tlv, 0, 100, 0);
-
-static int ec_command_get_gain(struct snd_soc_component *component,
- struct ec_param_codec_i2s *param,
- struct ec_codec_i2s_gain *resp)
+static int send_ec_host_command(struct cros_ec_device *ec_dev, uint32_t cmd,
+ uint8_t *out, size_t outsize,
+ uint8_t *in, size_t insize)
{
- struct cros_ec_codec_data *codec_data =
- snd_soc_component_get_drvdata(component);
- struct cros_ec_device *ec_device = codec_data->ec_device;
- u8 buffer[sizeof(struct cros_ec_command) +
- max(sizeof(struct ec_param_codec_i2s),
- sizeof(struct ec_codec_i2s_gain))];
- struct cros_ec_command *msg = (struct cros_ec_command *)&buffer;
int ret;
+ struct cros_ec_command *msg;
+
+ msg = kmalloc(sizeof(*msg) + max(outsize, insize), GFP_KERNEL);
+ if (!msg)
+ return -ENOMEM;
msg->version = 0;
- msg->command = EC_CMD_CODEC_I2S;
- msg->outsize = sizeof(struct ec_param_codec_i2s);
- msg->insize = sizeof(struct ec_codec_i2s_gain);
+ msg->command = cmd;
+ msg->outsize = outsize;
+ msg->insize = insize;
+
+ if (outsize)
+ memcpy(msg->data, out, outsize);
- memcpy(msg->data, param, msg->outsize);
+ ret = cros_ec_cmd_xfer_status(ec_dev, msg);
+ if (ret < 0)
+ goto error;
- ret = cros_ec_cmd_xfer_status(ec_device, msg);
- if (ret > 0)
- memcpy(resp, msg->data, msg->insize);
+ if (insize)
+ memcpy(in, msg->data, insize);
+ ret = 0;
+error:
+ kfree(msg);
return ret;
}
-/*
- * Wrapper for EC command without response.
- */
-static int ec_command_no_resp(struct snd_soc_component *component,
- struct ec_param_codec_i2s *param)
+static int dmic_get_gain(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *ucontrol)
{
- struct cros_ec_codec_data *codec_data =
+ struct snd_soc_component *component =
+ snd_soc_kcontrol_component(kcontrol);
+ struct cros_ec_codec_priv *priv =
snd_soc_component_get_drvdata(component);
- struct cros_ec_device *ec_device = codec_data->ec_device;
- u8 buffer[sizeof(struct cros_ec_command) +
- sizeof(struct ec_param_codec_i2s)];
- struct cros_ec_command *msg = (struct cros_ec_command *)&buffer;
-
- msg->version = 0;
- msg->command = EC_CMD_CODEC_I2S;
- msg->outsize = sizeof(struct ec_param_codec_i2s);
- msg->insize = 0;
-
- memcpy(msg->data, param, msg->outsize);
-
- return cros_ec_cmd_xfer_status(ec_device, msg);
-}
-
-static int set_i2s_config(struct snd_soc_component *component,
- enum ec_i2s_config i2s_config)
-{
- struct ec_param_codec_i2s param;
+ struct ec_param_ec_codec_i2s_rx p;
+ struct ec_response_ec_codec_i2s_rx_get_gain r;
+ int ret;
- dev_dbg(component->dev, "%s set I2S format to %u\n", __func__,
- i2s_config);
+ p.cmd = EC_CODEC_I2S_RX_GET_GAIN;
+ ret = send_ec_host_command(priv->ec_device, EC_CMD_EC_CODEC_I2S_RX,
+ (uint8_t *)&p, sizeof(p),
+ (uint8_t *)&r, sizeof(r));
+ if (ret < 0)
+ return ret;
- param.cmd = EC_CODEC_I2S_SET_CONFIG;
- param.i2s_config = i2s_config;
+ ucontrol->value.integer.value[0] = r.left;
+ ucontrol->value.integer.value[1] = r.right;
- return ec_command_no_resp(component, ¶m);
+ return 0;
}
-static int cros_ec_i2s_set_dai_fmt(struct snd_soc_dai *dai, unsigned int fmt)
+static int dmic_put_gain(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *ucontrol)
{
- struct snd_soc_component *component = dai->component;
- enum ec_i2s_config i2s_config;
-
- switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
- case SND_SOC_DAIFMT_CBS_CFS:
- break;
- default:
- return -EINVAL;
- }
-
- switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
- case SND_SOC_DAIFMT_NB_NF:
- break;
- default:
- return -EINVAL;
- }
-
- switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
- case SND_SOC_DAIFMT_I2S:
- i2s_config = EC_DAI_FMT_I2S;
- break;
-
- case SND_SOC_DAIFMT_RIGHT_J:
- i2s_config = EC_DAI_FMT_RIGHT_J;
- break;
-
- case SND_SOC_DAIFMT_LEFT_J:
- i2s_config = EC_DAI_FMT_LEFT_J;
- break;
-
- case SND_SOC_DAIFMT_DSP_A:
- i2s_config = EC_DAI_FMT_PCM_A;
- break;
-
- case SND_SOC_DAIFMT_DSP_B:
- i2s_config = EC_DAI_FMT_PCM_B;
- break;
+ struct snd_soc_component *component =
+ snd_soc_kcontrol_component(kcontrol);
+ struct cros_ec_codec_priv *priv =
+ snd_soc_component_get_drvdata(component);
+ struct soc_mixer_control *control =
+ (struct soc_mixer_control *)kcontrol->private_value;
+ int max_dmic_gain = control->max;
+ int left = ucontrol->value.integer.value[0];
+ int right = ucontrol->value.integer.value[1];
+ struct ec_param_ec_codec_i2s_rx p;
- default:
+ if (left > max_dmic_gain || right > max_dmic_gain)
return -EINVAL;
- }
- return set_i2s_config(component, i2s_config);
-}
-
-static int set_i2s_sample_depth(struct snd_soc_component *component,
- enum ec_sample_depth_value depth)
-{
- struct ec_param_codec_i2s param;
-
- dev_dbg(component->dev, "%s set depth to %u\n", __func__, depth);
-
- param.cmd = EC_CODEC_SET_SAMPLE_DEPTH;
- param.depth = depth;
+ dev_dbg(component->dev, "set mic gain to %u, %u\n", left, right);
- return ec_command_no_resp(component, ¶m);
+ p.cmd = EC_CODEC_I2S_RX_SET_GAIN;
+ p.set_gain_param.left = left;
+ p.set_gain_param.right = right;
+ return send_ec_host_command(priv->ec_device, EC_CMD_EC_CODEC_I2S_RX,
+ (uint8_t *)&p, sizeof(p), NULL, 0);
}
-static int set_i2s_bclk(struct snd_soc_component *component, uint32_t bclk)
-{
- struct ec_param_codec_i2s param;
-
- dev_dbg(component->dev, "%s set i2s bclk to %u\n", __func__, bclk);
+static const DECLARE_TLV_DB_SCALE(dmic_gain_tlv, 0, 100, 0);
- param.cmd = EC_CODEC_I2S_SET_BCLK;
- param.bclk = bclk;
+enum {
+ DMIC_CTL_GAIN = 0,
+};
- return ec_command_no_resp(component, ¶m);
-}
+static struct snd_kcontrol_new dmic_controls[] = {
+ [DMIC_CTL_GAIN] =
+ SOC_DOUBLE_EXT_TLV("EC Mic Gain", SND_SOC_NOPM, SND_SOC_NOPM,
+ 0, 0, 0, dmic_get_gain, dmic_put_gain,
+ dmic_gain_tlv),
+};
-static int cros_ec_i2s_hw_params(struct snd_pcm_substream *substream,
- struct snd_pcm_hw_params *params,
- struct snd_soc_dai *dai)
+static int i2s_rx_hw_params(struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *params,
+ struct snd_soc_dai *dai)
{
struct snd_soc_component *component = dai->component;
- unsigned int rate, bclk;
+ struct cros_ec_codec_priv *priv =
+ snd_soc_component_get_drvdata(component);
+ struct ec_param_ec_codec_i2s_rx p;
+ enum ec_codec_i2s_rx_sample_depth depth;
int ret;
- rate = params_rate(params);
- if (rate != 48000)
+ if (params_rate(params) != 48000)
return -EINVAL;
switch (params_format(params)) {
case SNDRV_PCM_FORMAT_S16_LE:
- ret = set_i2s_sample_depth(component, EC_CODEC_SAMPLE_DEPTH_16);
+ depth = EC_CODEC_I2S_RX_SAMPLE_DEPTH_16;
break;
case SNDRV_PCM_FORMAT_S24_LE:
- ret = set_i2s_sample_depth(component, EC_CODEC_SAMPLE_DEPTH_24);
+ depth = EC_CODEC_I2S_RX_SAMPLE_DEPTH_24;
break;
default:
return -EINVAL;
}
- if (ret < 0)
- return ret;
-
- bclk = snd_soc_params_to_bclk(params);
- return set_i2s_bclk(component, bclk);
-}
-static const struct snd_soc_dai_ops cros_ec_i2s_dai_ops = {
- .hw_params = cros_ec_i2s_hw_params,
- .set_fmt = cros_ec_i2s_set_dai_fmt,
-};
+ dev_dbg(component->dev, "set depth to %u\n", depth);
-static struct snd_soc_dai_driver cros_ec_dai[] = {
- {
- .name = "cros_ec_codec I2S",
- .id = 0,
- .capture = {
- .stream_name = "I2S Capture",
- .channels_min = 2,
- .channels_max = 2,
- .rates = SNDRV_PCM_RATE_48000,
- .formats = SNDRV_PCM_FMTBIT_S16_LE |
- SNDRV_PCM_FMTBIT_S24_LE,
- },
- .ops = &cros_ec_i2s_dai_ops,
- }
-};
-
-static int get_ec_mic_gain(struct snd_soc_component *component,
- u8 *left, u8 *right)
-{
- struct ec_param_codec_i2s param;
- struct ec_codec_i2s_gain resp;
- int ret;
-
- param.cmd = EC_CODEC_GET_GAIN;
-
- ret = ec_command_get_gain(component, ¶m, &resp);
+ p.cmd = EC_CODEC_I2S_RX_SET_SAMPLE_DEPTH;
+ p.set_sample_depth_param.depth = depth;
+ ret = send_ec_host_command(priv->ec_device, EC_CMD_EC_CODEC_I2S_RX,
+ (uint8_t *)&p, sizeof(p), NULL, 0);
if (ret < 0)
return ret;
- *left = resp.left;
- *right = resp.right;
-
- return 0;
-}
-
-static int mic_gain_get(struct snd_kcontrol *kcontrol,
- struct snd_ctl_elem_value *ucontrol)
-{
- struct snd_soc_component *component =
- snd_soc_kcontrol_component(kcontrol);
- u8 left, right;
- int ret;
-
- ret = get_ec_mic_gain(component, &left, &right);
- if (ret)
- return ret;
-
- ucontrol->value.integer.value[0] = left;
- ucontrol->value.integer.value[1] = right;
-
- return 0;
-}
-
-static int set_ec_mic_gain(struct snd_soc_component *component,
- u8 left, u8 right)
-{
- struct ec_param_codec_i2s param;
-
- dev_dbg(component->dev, "%s set mic gain to %u, %u\n",
- __func__, left, right);
+ dev_dbg(component->dev, "set bclk to %u\n",
+ snd_soc_params_to_bclk(params));
- param.cmd = EC_CODEC_SET_GAIN;
- param.gain.left = left;
- param.gain.right = right;
-
- return ec_command_no_resp(component, ¶m);
+ p.cmd = EC_CODEC_I2S_RX_SET_BCLK;
+ p.set_bclk_param.bclk = snd_soc_params_to_bclk(params);
+ return send_ec_host_command(priv->ec_device, EC_CMD_EC_CODEC_I2S_RX,
+ (uint8_t *)&p, sizeof(p), NULL, 0);
}
-static int mic_gain_put(struct snd_kcontrol *kcontrol,
- struct snd_ctl_elem_value *ucontrol)
+static int i2s_rx_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
{
- struct snd_soc_component *component =
- snd_soc_kcontrol_component(kcontrol);
- struct cros_ec_codec_data *codec_data =
+ struct snd_soc_component *component = dai->component;
+ struct cros_ec_codec_priv *priv =
snd_soc_component_get_drvdata(component);
- int left = ucontrol->value.integer.value[0];
- int right = ucontrol->value.integer.value[1];
- unsigned int max_dmic_gain = codec_data->max_dmic_gain;
+ struct ec_param_ec_codec_i2s_rx p;
+ enum ec_codec_i2s_rx_daifmt daifmt;
- if (left > max_dmic_gain || right > max_dmic_gain)
+ switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
+ case SND_SOC_DAIFMT_CBS_CFS:
+ break;
+ default:
return -EINVAL;
+ }
- return set_ec_mic_gain(component, (u8)left, (u8)right);
-}
-
-static struct snd_kcontrol_new mic_gain_control =
- SOC_DOUBLE_EXT_TLV("EC Mic Gain", SND_SOC_NOPM, SND_SOC_NOPM, 0, 0, 0,
- mic_gain_get, mic_gain_put, ec_mic_gain_tlv);
-
-static int enable_i2s(struct snd_soc_component *component, int enable)
-{
- struct ec_param_codec_i2s param;
+ switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
+ case SND_SOC_DAIFMT_NB_NF:
+ break;
+ default:
+ return -EINVAL;
+ }
- dev_dbg(component->dev, "%s set i2s to %u\n", __func__, enable);
+ switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
+ case SND_SOC_DAIFMT_I2S:
+ daifmt = EC_CODEC_I2S_RX_DAIFMT_I2S;
+ break;
+ case SND_SOC_DAIFMT_RIGHT_J:
+ daifmt = EC_CODEC_I2S_RX_DAIFMT_RIGHT_J;
+ break;
+ case SND_SOC_DAIFMT_LEFT_J:
+ daifmt = EC_CODEC_I2S_RX_DAIFMT_LEFT_J;
+ break;
+ default:
+ return -EINVAL;
+ }
- param.cmd = EC_CODEC_I2S_ENABLE;
- param.i2s_enable = enable;
+ dev_dbg(component->dev, "set format to %u\n", daifmt);
- return ec_command_no_resp(component, ¶m);
+ p.cmd = EC_CODEC_I2S_RX_SET_DAIFMT;
+ p.set_daifmt_param.daifmt = daifmt;
+ return send_ec_host_command(priv->ec_device, EC_CMD_EC_CODEC_I2S_RX,
+ (uint8_t *)&p, sizeof(p), NULL, 0);
}
-static int cros_ec_i2s_enable_event(struct snd_soc_dapm_widget *w,
- struct snd_kcontrol *kcontrol, int event)
+static const struct snd_soc_dai_ops i2s_rx_dai_ops = {
+ .hw_params = i2s_rx_hw_params,
+ .set_fmt = i2s_rx_set_fmt,
+};
+
+static int i2s_rx_event(struct snd_soc_dapm_widget *w,
+ struct snd_kcontrol *kcontrol, int event)
{
struct snd_soc_component *component =
snd_soc_dapm_to_component(w->dapm);
+ struct cros_ec_codec_priv *priv =
+ snd_soc_component_get_drvdata(component);
+ struct ec_param_ec_codec_i2s_rx p;
switch (event) {
case SND_SOC_DAPM_PRE_PMU:
- dev_dbg(component->dev,
- "%s got SND_SOC_DAPM_PRE_PMU event\n", __func__);
- return enable_i2s(component, 1);
-
+ dev_dbg(component->dev, "enable I2S RX\n");
+ p.cmd = EC_CODEC_I2S_RX_ENABLE;
+ break;
case SND_SOC_DAPM_PRE_PMD:
- dev_dbg(component->dev,
- "%s got SND_SOC_DAPM_PRE_PMD event\n", __func__);
- return enable_i2s(component, 0);
+ dev_dbg(component->dev, "disable I2S RX\n");
+ p.cmd = EC_CODEC_I2S_RX_DISABLE;
+ break;
+ default:
+ return 0;
}
- return 0;
+ return send_ec_host_command(priv->ec_device, EC_CMD_EC_CODEC_I2S_RX,
+ (uint8_t *)&p, sizeof(p), NULL, 0);
}
-/*
- * The goal of this DAPM route is to turn on/off I2S using EC
- * host command when capture stream is started/stopped.
- */
-static const struct snd_soc_dapm_widget cros_ec_codec_dapm_widgets[] = {
+static struct snd_soc_dapm_widget i2s_rx_dapm_widgets[] = {
SND_SOC_DAPM_INPUT("DMIC"),
-
- /*
- * Control EC to enable/disable I2S.
- */
- SND_SOC_DAPM_SUPPLY("I2S Enable", SND_SOC_NOPM,
- 0, 0, cros_ec_i2s_enable_event,
+ SND_SOC_DAPM_SUPPLY("I2S RX Enable", SND_SOC_NOPM, 0, 0, i2s_rx_event,
SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_PRE_PMD),
+ SND_SOC_DAPM_AIF_OUT("I2S RX", "I2S Capture", 0, SND_SOC_NOPM, 0, 0),
+};
- SND_SOC_DAPM_AIF_OUT("I2STX", "I2S Capture", 0, SND_SOC_NOPM, 0, 0),
+static struct snd_soc_dapm_route i2s_rx_dapm_routes[] = {
+ {"I2S RX", NULL, "DMIC"},
+ {"I2S RX", NULL, "I2S RX Enable"},
};
-static const struct snd_soc_dapm_route cros_ec_codec_dapm_routes[] = {
- { "I2STX", NULL, "DMIC" },
- { "I2STX", NULL, "I2S Enable" },
+static struct snd_soc_dai_driver i2s_rx_dai_driver = {
+ .name = "EC Codec I2S RX",
+ .capture = {
+ .stream_name = "I2S Capture",
+ .channels_min = 2,
+ .channels_max = 2,
+ .rates = SNDRV_PCM_RATE_48000,
+ .formats = SNDRV_PCM_FMTBIT_S16_LE |
+ SNDRV_PCM_FMTBIT_S24_LE,
+ },
+ .ops = &i2s_rx_dai_ops,
};
-/*
- * Read maximum gain from device property and set it to mixer control.
- */
-static int cros_ec_set_gain_range(struct device *dev)
+static int i2s_rx_probe(struct snd_soc_component *component)
{
+ struct cros_ec_codec_priv *priv =
+ snd_soc_component_get_drvdata(component);
+ struct device *dev = priv->dev;
+ int ret, val;
struct soc_mixer_control *control;
- struct cros_ec_codec_data *codec_data = dev_get_drvdata(dev);
- int rc;
- rc = device_property_read_u32(dev, "max-dmic-gain",
- &codec_data->max_dmic_gain);
- if (rc)
- return rc;
+ ret = device_property_read_u32(dev, "max-dmic-gain", &val);
+ if (ret) {
+ dev_err(dev, "Failed to read 'max-dmic-gain'\n");
+ return ret;
+ }
control = (struct soc_mixer_control *)
- mic_gain_control.private_value;
- control->max = codec_data->max_dmic_gain;
- control->platform_max = codec_data->max_dmic_gain;
+ dmic_controls[DMIC_CTL_GAIN].private_value;
+ control->max = val;
+ control->platform_max = val;
- return 0;
-}
-
-static int cros_ec_codec_probe(struct snd_soc_component *component)
-{
- int rc;
-
- struct cros_ec_codec_data *codec_data =
- snd_soc_component_get_drvdata(component);
-
- rc = cros_ec_set_gain_range(codec_data->dev);
- if (rc)
- return rc;
-
- return snd_soc_add_component_controls(component, &mic_gain_control, 1);
+ return snd_soc_add_component_controls(component,
+ &dmic_controls[DMIC_CTL_GAIN], 1);
}
-static const struct snd_soc_component_driver cros_ec_component_driver = {
- .probe = cros_ec_codec_probe,
- .dapm_widgets = cros_ec_codec_dapm_widgets,
- .num_dapm_widgets = ARRAY_SIZE(cros_ec_codec_dapm_widgets),
- .dapm_routes = cros_ec_codec_dapm_routes,
- .num_dapm_routes = ARRAY_SIZE(cros_ec_codec_dapm_routes),
+static const struct snd_soc_component_driver i2s_rx_component_driver = {
+ .probe = i2s_rx_probe,
+ .dapm_widgets = i2s_rx_dapm_widgets,
+ .num_dapm_widgets = ARRAY_SIZE(i2s_rx_dapm_widgets),
+ .dapm_routes = i2s_rx_dapm_routes,
+ .num_dapm_routes = ARRAY_SIZE(i2s_rx_dapm_routes),
};
-/*
- * Platform device and platform driver fro cros-ec-codec.
- */
-static int cros_ec_codec_platform_probe(struct platform_device *pd)
+static int cros_ec_codec_platform_probe(struct platform_device *pdev)
{
- struct device *dev = &pd->dev;
- struct cros_ec_device *ec_device = dev_get_drvdata(pd->dev.parent);
- struct cros_ec_codec_data *codec_data;
+ struct device *dev = &pdev->dev;
+ struct cros_ec_device *ec_device = dev_get_drvdata(pdev->dev.parent);
+ struct cros_ec_codec_priv *priv;
- codec_data = devm_kzalloc(dev, sizeof(struct cros_ec_codec_data),
- GFP_KERNEL);
- if (!codec_data)
+ priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
+ if (!priv)
return -ENOMEM;
- codec_data->dev = dev;
- codec_data->ec_device = ec_device;
+ priv->dev = dev;
+ priv->ec_device = ec_device;
- platform_set_drvdata(pd, codec_data);
+ platform_set_drvdata(pdev, priv);
- return devm_snd_soc_register_component(dev, &cros_ec_component_driver,
- cros_ec_dai, ARRAY_SIZE(cros_ec_dai));
+ return devm_snd_soc_register_component(dev, &i2s_rx_component_driver,
+ &i2s_rx_dai_driver, 1);
}
#ifdef CONFIG_OF
static struct platform_driver cros_ec_codec_platform_driver = {
.driver = {
- .name = DRV_NAME,
+ .name = "cros-ec-codec",
.of_match_table = of_match_ptr(cros_ec_codec_of_match),
},
.probe = cros_ec_codec_platform_probe,
MODULE_LICENSE("GPL v2");
MODULE_DESCRIPTION("ChromeOS EC codec driver");
MODULE_AUTHOR("Cheng-Yi Chiang <cychiang@chromium.org>");
-MODULE_ALIAS("platform:" DRV_NAME);
+MODULE_ALIAS("platform:cros-ec-codec");
projects / linux-2.6-block.git / commitdiff