[alsa-devel] [PATCH v3 02/10] ASoC: cros_ec_codec: refactor I2S RX
Benson Leung
bleung at google.com
Thu Oct 17 04:30:03 CEST 2019
Hi Tzung-Bi,
On Mon, Oct 14, 2019 at 06:20:14PM +0800, Tzung-Bi Shih wrote:
> Refactor by the following items:
> - reformat copyright declaration
> - use more specific name "i2s rx"
> - use verbose symbol names to separate namespaces
> - make some short functions inline
> - remove unused TDM-related code
>
> Signed-off-by: Tzung-Bi Shih <tzungbi at google.com>
Acked-By: Benson Leung <bleung at chromium.org>
Thanks,
Benson
> ---
> drivers/platform/chrome/cros_ec_trace.c | 2 +-
> .../linux/platform_data/cros_ec_commands.h | 120 ++---
> sound/soc/codecs/cros_ec_codec.c | 502 +++++++-----------
> 3 files changed, 251 insertions(+), 373 deletions(-)
>
> diff --git a/drivers/platform/chrome/cros_ec_trace.c b/drivers/platform/chrome/cros_ec_trace.c
> index 6f80ff4532ae..901850004b2b 100644
> --- a/drivers/platform/chrome/cros_ec_trace.c
> +++ b/drivers/platform/chrome/cros_ec_trace.c
> @@ -98,7 +98,7 @@
> TRACE_SYMBOL(EC_CMD_SB_READ_BLOCK), \
> TRACE_SYMBOL(EC_CMD_SB_WRITE_BLOCK), \
> TRACE_SYMBOL(EC_CMD_BATTERY_VENDOR_PARAM), \
> - TRACE_SYMBOL(EC_CMD_CODEC_I2S), \
> + TRACE_SYMBOL(EC_CMD_EC_CODEC_I2S_RX), \
> TRACE_SYMBOL(EC_CMD_REBOOT_EC), \
> TRACE_SYMBOL(EC_CMD_GET_PANIC_INFO), \
> TRACE_SYMBOL(EC_CMD_ACPI_READ), \
> diff --git a/include/linux/platform_data/cros_ec_commands.h b/include/linux/platform_data/cros_ec_commands.h
> index 43b8f7dae4cc..261ac83bd007 100644
> --- a/include/linux/platform_data/cros_ec_commands.h
> +++ b/include/linux/platform_data/cros_ec_commands.h
> @@ -4466,92 +4466,74 @@ enum mkbp_cec_event {
>
> /*****************************************************************************/
>
> -/* Commands for I2S recording on audio codec. */
> -
> -#define EC_CMD_CODEC_I2S 0x00BC
> -#define EC_WOV_I2S_SAMPLE_RATE 48000
> -
> -enum ec_codec_i2s_subcmd {
> - EC_CODEC_SET_SAMPLE_DEPTH = 0x0,
> - EC_CODEC_SET_GAIN = 0x1,
> - EC_CODEC_GET_GAIN = 0x2,
> - EC_CODEC_I2S_ENABLE = 0x3,
> - EC_CODEC_I2S_SET_CONFIG = 0x4,
> - EC_CODEC_I2S_SET_TDM_CONFIG = 0x5,
> - EC_CODEC_I2S_SET_BCLK = 0x6,
> - EC_CODEC_I2S_SUBCMD_COUNT = 0x7,
> +/* Commands for I2S RX on audio codec. */
> +
> +#define EC_CMD_EC_CODEC_I2S_RX 0x00BC
> +
> +enum ec_codec_i2s_rx_subcmd {
> + EC_CODEC_I2S_RX_ENABLE = 0x0,
> + EC_CODEC_I2S_RX_DISABLE = 0x1,
> + EC_CODEC_I2S_RX_SET_GAIN = 0x2,
> + EC_CODEC_I2S_RX_GET_GAIN = 0x3,
> + EC_CODEC_I2S_RX_SET_SAMPLE_DEPTH = 0x4,
> + EC_CODEC_I2S_RX_SET_DAIFMT = 0x5,
> + EC_CODEC_I2S_RX_SET_BCLK = 0x6,
> + EC_CODEC_I2S_RX_SUBCMD_COUNT,
> };
>
> -enum ec_sample_depth_value {
> - EC_CODEC_SAMPLE_DEPTH_16 = 0,
> - EC_CODEC_SAMPLE_DEPTH_24 = 1,
> +enum ec_codec_i2s_rx_sample_depth {
> + EC_CODEC_I2S_RX_SAMPLE_DEPTH_16 = 0x0,
> + EC_CODEC_I2S_RX_SAMPLE_DEPTH_24 = 0x1,
> + EC_CODEC_I2S_RX_SAMPLE_DEPTH_COUNT,
> };
>
> -enum ec_i2s_config {
> - EC_DAI_FMT_I2S = 0,
> - EC_DAI_FMT_RIGHT_J = 1,
> - EC_DAI_FMT_LEFT_J = 2,
> - EC_DAI_FMT_PCM_A = 3,
> - EC_DAI_FMT_PCM_B = 4,
> - EC_DAI_FMT_PCM_TDM = 5,
> +enum ec_codec_i2s_rx_daifmt {
> + EC_CODEC_I2S_RX_DAIFMT_I2S = 0x0,
> + EC_CODEC_I2S_RX_DAIFMT_RIGHT_J = 0x1,
> + EC_CODEC_I2S_RX_DAIFMT_LEFT_J = 0x2,
> + EC_CODEC_I2S_RX_DAIFMT_COUNT,
> };
>
> -/*
> - * For subcommand EC_CODEC_GET_GAIN.
> - */
> -struct __ec_align1 ec_codec_i2s_gain {
> +struct __ec_align1 ec_param_ec_codec_i2s_rx_set_sample_depth {
> + uint8_t depth;
> + uint8_t reserved[3];
> +};
> +
> +struct __ec_align1 ec_param_ec_codec_i2s_rx_set_gain {
> uint8_t left;
> uint8_t right;
> + uint8_t reserved[2];
> };
>
> -struct __ec_todo_unpacked ec_param_codec_i2s_tdm {
> - int16_t ch0_delay; /* 0 to 496 */
> - int16_t ch1_delay; /* -1 to 496 */
> - uint8_t adjacent_to_ch0;
> - uint8_t adjacent_to_ch1;
> +struct __ec_align1 ec_param_ec_codec_i2s_rx_set_daifmt {
> + uint8_t daifmt;
> + uint8_t reserved[3];
> };
>
> -struct __ec_todo_packed ec_param_codec_i2s {
> - /* enum ec_codec_i2s_subcmd */
> - uint8_t cmd;
> - union {
> - /*
> - * EC_CODEC_SET_SAMPLE_DEPTH
> - * Value should be one of ec_sample_depth_value.
> - */
> - uint8_t depth;
> -
> - /*
> - * EC_CODEC_SET_GAIN
> - * Value should be 0~43 for both channels.
> - */
> - struct ec_codec_i2s_gain gain;
> -
> - /*
> - * EC_CODEC_I2S_ENABLE
> - * 1 to enable, 0 to disable.
> - */
> - uint8_t i2s_enable;
> -
> - /*
> - * EC_CODEC_I2S_SET_CONFIG
> - * Value should be one of ec_i2s_config.
> - */
> - uint8_t i2s_config;
> +struct __ec_align4 ec_param_ec_codec_i2s_rx_set_bclk {
> + uint32_t bclk;
> +};
>
> - /*
> - * EC_CODEC_I2S_SET_TDM_CONFIG
> - * Value should be one of ec_i2s_config.
> - */
> - struct ec_param_codec_i2s_tdm tdm_param;
> +struct __ec_align4 ec_param_ec_codec_i2s_rx {
> + uint8_t cmd; /* enum ec_codec_i2s_rx_subcmd */
> + uint8_t reserved[3];
>
> - /*
> - * EC_CODEC_I2S_SET_BCLK
> - */
> - uint32_t bclk;
> + union {
> + struct ec_param_ec_codec_i2s_rx_set_sample_depth
> + set_sample_depth_param;
> + struct ec_param_ec_codec_i2s_rx_set_gain
> + set_gain_param;
> + struct ec_param_ec_codec_i2s_rx_set_daifmt
> + set_daifmt_param;
> + struct ec_param_ec_codec_i2s_rx_set_bclk
> + set_bclk_param;
> };
> };
>
> +struct __ec_align1 ec_response_ec_codec_i2s_rx_get_gain {
> + uint8_t left;
> + uint8_t right;
> +};
>
> /*****************************************************************************/
> /* System commands */
> diff --git a/sound/soc/codecs/cros_ec_codec.c b/sound/soc/codecs/cros_ec_codec.c
> index 3c1bd24a1057..179fa77291cd 100644
> --- a/sound/soc/codecs/cros_ec_codec.c
> +++ b/sound/soc/codecs/cros_ec_codec.c
> @@ -1,6 +1,8 @@
> // 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.
> @@ -18,403 +20,297 @@
> #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
> @@ -427,7 +323,7 @@ MODULE_DEVICE_TABLE(of, cros_ec_codec_of_match);
>
> 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,
> @@ -438,4 +334,4 @@ module_platform_driver(cros_ec_codec_platform_driver);
> MODULE_LICENSE("GPL v2");
> MODULE_DESCRIPTION("ChromeOS EC codec driver");
> MODULE_AUTHOR("Cheng-Yi Chiang <cychiang at chromium.org>");
> -MODULE_ALIAS("platform:" DRV_NAME);
> +MODULE_ALIAS("platform:cros-ec-codec");
> --
> 2.23.0.700.g56cf767bdb-goog
>
--
Benson Leung
Staff Software Engineer
Chrome OS Kernel
Google Inc.
bleung at google.com
Chromium OS Project
bleung at chromium.org
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