// SPDX-License-Identifier: GPL-2.0
/*
* 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 <crypto/sha2.h>
#include <linux/acpi.h>
#include <linux/delay.h>
#include <linux/device.h>
#include <linux/io.h>
#include <linux/jiffies.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_address.h>
#include <linux/platform_data/cros_ec_commands.h>
#include <linux/platform_data/cros_ec_proto.h>
#include <linux/platform_device.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include <sound/tlv.h>
struct cros_ec_codec_priv {
struct device *dev;
struct cros_ec_device *ec_device;
/* common */
uint32_t ec_capabilities;
uint64_t ec_shm_addr;
uint32_t ec_shm_len;
uint64_t ap_shm_phys_addr;
uint32_t ap_shm_len;
uint64_t ap_shm_addr;
uint64_t ap_shm_last_alloc;
/* DMIC */
atomic_t dmic_probed;
/* I2S_RX */
uint32_t i2s_rx_bclk_ratio;
/* WoV */
bool wov_enabled;
uint8_t *wov_audio_shm_p;
uint32_t wov_audio_shm_len;
uint8_t wov_audio_shm_type;
uint8_t *wov_lang_shm_p;
uint32_t wov_lang_shm_len;
uint8_t wov_lang_shm_type;
struct mutex wov_dma_lock;
uint8_t wov_buf[64000];
uint32_t wov_rp, wov_wp;
size_t wov_dma_offset;
bool wov_burst_read;
struct snd_pcm_substream *wov_substream;
struct delayed_work wov_copy_work;
struct notifier_block wov_notifier;
};
static int ec_codec_capable(struct cros_ec_codec_priv *priv, uint8_t cap)
{
return priv->ec_capabilities & BIT(cap);
}
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)
{
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 = cmd;
msg->outsize = outsize;
msg->insize = insize;
if (outsize)
memcpy(msg->data, out, outsize);
ret = cros_ec_cmd_xfer_status(ec_dev, msg);
if (ret < 0)
goto error;
if (in && insize)
memcpy(in, msg->data, insize);
ret = 0;
error:
kfree(msg);
return ret;
}
static int dmic_get_gain(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_soc_component *component =
snd_soc_kcontrol_component(kcontrol);
struct cros_ec_codec_priv *priv =
snd_soc_component_get_drvdata(component);
struct ec_param_ec_codec_dmic p;
struct ec_response_ec_codec_dmic_get_gain_idx r;
int ret;
p.cmd = EC_CODEC_DMIC_GET_GAIN_IDX;
p.get_gain_idx_param.channel = EC_CODEC_DMIC_CHANNEL_0;
ret = send_ec_host_command(priv->ec_device, EC_CMD_EC_CODEC_DMIC,
(uint8_t *)&p, sizeof(p),
(uint8_t *)&r, sizeof(r));
if (ret < 0)
return ret;
ucontrol->value.integer.value[0] = r.gain;
p.cmd = EC_CODEC_DMIC_GET_GAIN_IDX;
p.get_gain_idx_param.channel = EC_CODEC_DMIC_CHANNEL_1;
ret = send_ec_host_command(priv->ec_device, EC_CMD_EC_CODEC_DMIC,
(uint8_t *)&p, sizeof(p),
(uint8_t *)&r, sizeof(r));
if (ret < 0)
return ret;
ucontrol->value.integer.value[1] = r.gain;
return 0;
}
static int dmic_put_gain(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
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_dmic p;
int ret;
if (left > max_dmic_gain || right > max_dmic_gain)
return -EINVAL;
dev_dbg(component->dev, "set mic gain to %u, %u\n", left, right);
p.cmd = EC_CODEC_DMIC_SET_GAIN_IDX;
p.set_gain_idx_param.channel = EC_CODEC_DMIC_CHANNEL_0;
p.set_gain_idx_param.gain = left;
ret = send_ec_host_command(priv->ec_device, EC_CMD_EC_CODEC_DMIC,
(uint8_t *)&p, sizeof(p), NULL, 0);
if (ret < 0)
return ret;
p.cmd = EC_CODEC_DMIC_SET_GAIN_IDX;
p.set_gain_idx_param.channel = EC_CODEC_DMIC_CHANNEL_1;
p.set_gain_idx_param.gain = right;
return send_ec_host_command(priv->ec_device, EC_CMD_EC_CODEC_DMIC,
(uint8_t *)&p, sizeof(p), NULL, 0);
}
static const DECLARE_TLV_DB_SCALE(dmic_gain_tlv, 0, 100, 0);
enum {
DMIC_CTL_GAIN = 0,
};
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 dmic_probe(struct snd_soc_component *component)
{
struct cros_ec_codec_priv *priv =
snd_soc_component_get_drvdata(component);
struct device *dev = priv->dev;
struct soc_mixer_control *control;
struct ec_param_ec_codec_dmic p;
struct ec_response_ec_codec_dmic_get_max_gain r;
int ret;
if (!atomic_add_unless(&priv->dmic_probed, 1, 1))
return 0;
p.cmd = EC_CODEC_DMIC_GET_MAX_GAIN;
ret = send_ec_host_command(priv->ec_device, EC_CMD_EC_CODEC_DMIC,
(uint8_t *)&p, sizeof(p),
(uint8_t *)&r, sizeof(r));
if (ret < 0) {
dev_warn(dev, "get_max_gain() unsupported\n");
return 0;
}
dev_dbg(dev, "max gain = %d\n", r.max_gain);
control = (struct soc_mixer_control *)
dmic_controls[DMIC_CTL_GAIN].private_value;
control->max = r.max_gain;
control->platform_max = r.max_gain;
return snd_soc_add_component_controls(component,
&dmic_controls[DMIC_CTL_GAIN], 1);
}
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;
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;
uint32_t bclk;
int ret;
if (params_rate(params) != 48000)
return -EINVAL;
switch (params_width(params)) {
case 16:
depth = EC_CODEC_I2S_RX_SAMPLE_DEPTH_16;
break;
case 24:
depth = EC_CODEC_I2S_RX_SAMPLE_DEPTH_24;
break;
default:
return -EINVAL;
}
dev_dbg(component->dev, "set depth to %u\n", depth);
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;
if (priv->i2s_rx_bclk_ratio)
bclk = params_rate(params) * priv->i2s_rx_bclk_ratio;
else
bclk = snd_soc_params_to_bclk(params);
dev_dbg(component->dev, "set bclk to %u\n", bclk);
p.cmd = EC_CODEC_I2S_RX_SET_BCLK;
p.set_bclk_param.bclk = bclk;
return send_ec_host_command(priv->ec_device, EC_CMD_EC_CODEC_I2S_RX,
(uint8_t *)&p, sizeof(p), NULL, 0);
}
static int i2s_rx_set_bclk_ratio(struct snd_soc_dai *dai, unsigned int ratio)
{
struct snd_soc_component *component = dai->component;
struct cros_ec_codec_priv *priv =
snd_soc_component_get_drvdata(component);
priv->i2s_rx_bclk_ratio = ratio;
return 0;
}
static int i2s_rx_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
{
struct snd_soc_component *component = dai->component;
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_daifmt daifmt;
switch (fmt & SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) {
case SND_SOC_DAIFMT_CBC_CFC:
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:
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;
}
dev_dbg(component->dev, "set format to %u\n", daifmt);
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 const struct snd_soc_dai_ops i2s_rx_dai_ops = {
.hw_params = i2s_rx_hw_params,
.set_fmt = i2s_rx_set_fmt,
.set_bclk_ratio = i2s_rx_set_bclk_ratio,
};
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, "enable I2S RX\n");
p.cmd = EC_CODEC_I2S_RX_ENABLE;
break;
case SND_SOC_DAPM_PRE_PMD:
dev_dbg(component->dev, "disable I2S RX\n");
p.cmd = EC_CODEC_I2S_RX_DISABLE;
break;
default:
return 0;
}
return send_ec_host_command(priv->ec_device, EC_CMD_EC_CODEC_I2S_RX,
(uint8_t *)&p, sizeof(p), NULL, 0);
}
static struct snd_soc_dapm_widget i2s_rx_dapm_widgets[] = {
SND_SOC_DAPM_INPUT("DMIC"),
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),
};
static struct snd_soc_dapm_route i2s_rx_dapm_routes[] = {
{"I2S RX", NULL, "DMIC"},
{"I2S RX", NULL, "I2S RX 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,
};
static int i2s_rx_probe(struct snd_soc_component *component)
{
return dmic_probe(component);
}
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),
.endianness = 1,
};
static void *wov_map_shm(struct cros_ec_codec_priv *priv,
uint8_t shm_id, uint32_t *len, uint8_t *type)
{
struct ec_param_ec_codec p;
struct ec_response_ec_codec_get_shm_addr r;
uint32_t req, offset;
p.cmd = EC_CODEC_GET_SHM_ADDR;
p.get_shm_addr_param.shm_id = shm_id;
if (send_ec_host_command(priv->ec_device, EC_CMD_EC_CODEC,
(uint8_t *)&p, sizeof(p),
(uint8_t *)&r, sizeof(r)) < 0) {
dev_err(priv->dev, "failed to EC_CODEC_GET_SHM_ADDR\n");
return NULL;
}
dev_dbg(priv->dev, "phys_addr=%#llx, len=%#x\n", r.phys_addr, r.len);
*len = r.len;
*type = r.type;
switch (r.type) {
case EC_CODEC_SHM_TYPE_EC_RAM:
return (void __force *)devm_ioremap_wc(priv->dev,
r.phys_addr + priv->ec_shm_addr, r.len);
case EC_CODEC_SHM_TYPE_SYSTEM_RAM:
if (r.phys_addr) {
dev_err(priv->dev, "unknown status\n");
return NULL;
}
req = round_up(r.len, PAGE_SIZE);
dev_dbg(priv->dev, "round up from %u to %u\n", r.len, req);
if (priv->ap_shm_last_alloc + req >
priv->ap_shm_phys_addr + priv->ap_shm_len) {
dev_err(priv->dev, "insufficient space for AP SHM\n");
return NULL;
}
dev_dbg(priv->dev, "alloc AP SHM addr=%#llx, len=%#x\n",
priv->ap_shm_last_alloc, req);
p.cmd = EC_CODEC_SET_SHM_ADDR;
p.set_shm_addr_param.phys_addr = priv->ap_shm_last_alloc;
p.set_shm_addr_param.len = req;
p.set_shm_addr_param.shm_id = shm_id;
if (send_ec_host_command(priv->ec_device, EC_CMD_EC_CODEC,
(uint8_t *)&p, sizeof(p),
NULL, 0) < 0) {
dev_err(priv->dev, "failed to EC_CODEC_SET_SHM_ADDR\n");
return NULL;
}
/*
* Note: EC codec only requests for `r.len' but we allocate
* round up PAGE_SIZE `req'.
*/
offset = priv->ap_shm_last_alloc - priv->ap_shm_phys_addr;
priv->ap_shm_last_alloc += req;
return (void *)(uintptr_t)(priv->ap_shm_addr + offset);
default:
return NULL;
}
}
static bool wov_queue_full(struct cros_ec_codec_priv *priv)
{
return ((priv->wov_wp + 1) % sizeof(priv->wov_buf)) == priv->wov_rp;
}
static size_t wov_queue_size(struct cros_ec_codec_priv *priv)
{
if (priv->wov_wp >= priv->wov_rp)
return priv->wov_wp - priv->wov_rp;
else
return sizeof(priv->wov_buf) - priv->wov_rp + priv->wov_wp;
}
static void wov_queue_dequeue(struct cros_ec_codec_priv *priv, size_t len)
{
struct snd_pcm_runtime *runtime = priv->wov_substream->runtime;
size_t req;
while (len) {
req = min(len, runtime->dma_bytes - priv->wov_dma_offset);
if (priv->wov_wp >= priv->wov_rp)
req = min(req, (size_t)priv->wov_wp - priv->wov_rp);
else
req = min(req, sizeof(priv->wov_buf) - priv->wov_rp);
memcpy(runtime->dma_area + priv->wov_dma_offset,
priv->wov_buf + priv->wov_rp, req);
priv->wov_dma_offset += req;
if (priv->wov_dma_offset == runtime->dma_bytes)
priv->wov_dma_offset = 0;
priv->wov_rp += req;
if (priv->wov_rp == sizeof(priv->wov_buf))
priv->wov_rp = 0;
len -= req;
}
snd_pcm_period_elapsed(priv->wov_substream);
}
static void wov_queue_try_dequeue(struct cros_ec_codec_priv *priv)
{
size_t period_bytes = snd_pcm_lib_period_bytes(priv->wov_substream);
while (period_bytes && wov_queue_size(priv) >= period_bytes) {
wov_queue_dequeue(priv, period_bytes);
period_bytes = snd_pcm_lib_period_bytes(priv->wov_substream);
}
}
static void wov_queue_enqueue(struct cros_ec_codec_priv *priv,
uint8_t *addr, size_t len, bool iomem)
{
size_t req;
while (len) {
if (wov_queue_full(priv)) {
wov_queue_try_dequeue(priv);
if (wov_queue_full(priv)) {
dev_err(priv->dev, "overrun detected\n");
return;
}
}
if (priv->wov_wp >= priv->wov_rp)
req = sizeof(priv->wov_buf) - priv->wov_wp;
else
/* Note: waste 1-byte to differentiate full and empty */
req = priv->wov_rp - priv->wov_wp - 1;
req = min(req, len);
if (iomem)
memcpy_fromio(priv->wov_buf + priv->wov_wp,
(void __force __iomem *)addr, req);
else
memcpy(priv->wov_buf + priv->wov_wp, addr, req);
priv->wov_wp += req;
if (priv->wov_wp == sizeof(priv->wov_buf))
priv->wov_wp = 0;
addr += req;
len -= req;
}
wov_queue_try_dequeue(priv);
}
static int wov_read_audio_shm(struct cros_ec_codec_priv *priv)
{
struct ec_param_ec_codec_wov p;
struct ec_response_ec_codec_wov_read_audio_shm r;
int ret;
p.cmd = EC_CODEC_WOV_READ_AUDIO_SHM;
ret = send_ec_host_command(priv->ec_device, EC_CMD_EC_CODEC_WOV,
(uint8_t *)&p, sizeof(p),
(uint8_t *)&r, sizeof(r));
if (ret) {
dev_err(priv->dev, "failed to EC_CODEC_WOV_READ_AUDIO_SHM\n");
return ret;
}
if (!r.len)
dev_dbg(priv->dev, "no data, sleep\n");
else
wov_queue_enqueue(priv, priv->wov_audio_shm_p + r.offset, r.len,
priv->wov_audio_shm_type == EC_CODEC_SHM_TYPE_EC_RAM);
return -EAGAIN;
}
static int wov_read_audio(struct cros_ec_codec_priv *priv)
{
struct ec_param_ec_codec_wov p;
struct ec_response_ec_codec_wov_read_audio r;
int remain = priv->wov_burst_read ? 16000 : 320;
int ret;
while (remain >= 0) {
p.cmd = EC_CODEC_WOV_READ_AUDIO;
ret = send_ec_host_command(priv->ec_device, EC_CMD_EC_CODEC_WOV,
(uint8_t *)&p, sizeof(p),
(uint8_t *)&r, sizeof(r));
if (ret) {
dev_err(priv->dev,
"failed to EC_CODEC_WOV_READ_AUDIO\n");
return ret;
}
if (!r.len) {
dev_dbg(priv->dev, "no data, sleep\n");
priv->wov_burst_read = false;
break;
}
wov_queue_enqueue(priv, r.buf, r.len, false);
remain -= r.len;
}
return -EAGAIN;
}
static void wov_copy_work(struct work_struct *w)
{
struct cros_ec_codec_priv *priv =
container_of(w, struct cros_ec_codec_priv, wov_copy_work.work);
int ret;
mutex_lock(&priv->wov_dma_lock);
if (!priv->wov_substream) {
dev_warn(priv->dev, "no pcm substream\n");
goto leave;
}
if (ec_codec_capable(priv, EC_CODEC_CAP_WOV_AUDIO_SHM))
ret = wov_read_audio_shm(priv);
else
ret = wov_read_audio(priv);
if (ret == -EAGAIN)
schedule_delayed_work(&priv->wov_copy_work,
msecs_to_jiffies(10));
else if (ret)
dev_err(priv->dev, "failed to read audio data\n");
leave:
mutex_unlock(&priv->wov_dma_lock);
}
static int wov_enable_get(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_soc_component *c = snd_soc_kcontrol_component(kcontrol);
struct cros_ec_codec_priv *priv = snd_soc_component_get_drvdata(c);
ucontrol->value.integer.value[0] = priv->wov_enabled;
return 0;
}
static int wov_enable_put(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_soc_component *c = snd_soc_kcontrol_component(kcontrol);
struct cros_ec_codec_priv *priv = snd_soc_component_get_drvdata(c);
int enabled = ucontrol->value.integer.value[0];
struct ec_param_ec_codec_wov p;
int ret;
if (priv->wov_enabled != enabled) {
if (enabled)
p.cmd = EC_CODEC_WOV_ENABLE;
else
p.cmd = EC_CODEC_WOV_DISABLE;
ret = send_ec_host_command(priv->ec_device, EC_CMD_EC_CODEC_WOV,
(uint8_t *)&p, sizeof(p), NULL, 0);
if (ret) {
dev_err(priv->dev, "failed to %s wov\n",
enabled ? "enable" : "disable");
return ret;
}
priv->wov_enabled = enabled;
}
return 0;
}
static int wov_set_lang_shm(struct cros_ec_codec_priv *priv,
uint8_t *buf, size_t size, uint8_t *digest)
{
struct ec_param_ec_codec_wov p;
struct ec_param_ec_codec_wov_set_lang_shm *pp = &p.set_lang_shm_param;
int ret;
if (size > priv->wov_lang_shm_len) {
dev_err(priv->dev, "no enough SHM size: %d\n",
priv->wov_lang_shm_len);
return -EIO;
}
switch (priv->wov_lang_shm_type) {
case EC_CODEC_SHM_TYPE_EC_RAM:
memcpy_toio((void __force __iomem *)priv->wov_lang_shm_p,
buf, size);
memset_io((void __force __iomem *)priv->wov_lang_shm_p + size,
0, priv->wov_lang_shm_len - size);
break;
case EC_CODEC_SHM_TYPE_SYSTEM_RAM:
memcpy(priv->wov_lang_shm_p, buf, size);
memset(priv->wov_lang_shm_p + size, 0,
priv->wov_lang_shm_len - size);
/* make sure write to memory before calling host command */
wmb();
break;
}
p.cmd = EC_CODEC_WOV_SET_LANG_SHM;
memcpy(pp->hash, digest, SHA256_DIGEST_SIZE);
pp->total_len = size;
ret = send_ec_host_command(priv->ec_device, EC_CMD_EC_CODEC_WOV,
(uint8_t *)&p, sizeof(p), NULL, 0);
if (ret) {
dev_err(priv->dev, "failed to EC_CODEC_WOV_SET_LANG_SHM\n");
return ret;
}
return 0;
}
static int wov_set_lang(struct cros_ec_codec_priv *priv,
uint8_t *buf, size_t size, uint8_t *digest)
{
struct ec_param_ec_codec_wov p;
struct ec_param_ec_codec_wov_set_lang *pp = &p.set_lang_param;
size_t i, req;
int ret;
for (i = 0; i < size; i += req) {
req = min(size - i, ARRAY_SIZE(pp->buf));
p.cmd = EC_CODEC_WOV_SET_LANG;
memcpy(pp->hash, digest, SHA256_DIGEST_SIZE);
pp->total_len = size;
pp->offset = i;
memcpy(pp->buf, buf + i, req);
pp->len = req;
ret = send_ec_host_command(priv->ec_device, EC_CMD_EC_CODEC_WOV,
(uint8_t *)&p, sizeof(p), NULL, 0);
if (ret) {
dev_err(priv->dev, "failed to EC_CODEC_WOV_SET_LANG\n");
return ret;
}
}
return 0;
}
static int wov_hotword_model_put(struct snd_kcontrol *kcontrol,
const unsigned int __user *bytes,
unsigned int size)
{
struct snd_soc_component *component = snd_kcontrol_chip(kcontrol);
struct cros_ec_codec_priv *priv =
snd_soc_component_get_drvdata(component);
struct ec_param_ec_codec_wov p;
struct ec_response_ec_codec_wov_get_lang r;
uint8_t digest[SHA256_DIGEST_SIZE];
uint8_t *buf;
int ret;
/* Skips the TLV header. */
bytes += 2;
size -= 8;
dev_dbg(priv->dev, "%s: size=%d\n", __func__, size);
buf = memdup_user(bytes, size);
if (IS_ERR(buf))
return PTR_ERR(buf);
sha256(buf, size, digest);
dev_dbg(priv->dev, "hash=%*phN\n", SHA256_DIGEST_SIZE, digest);
p.cmd = EC_CODEC_WOV_GET_LANG;
ret = send_ec_host_command(priv->ec_device, EC_CMD_EC_CODEC_WOV,
(uint8_t *)&p, sizeof(p),
(uint8_t *)&r, sizeof(r));
if (ret)
goto leave;
if (memcmp(digest, r.hash, SHA256_DIGEST_SIZE) == 0) {
dev_dbg(priv->dev, "not updated");
goto leave;
}
if (ec_codec_capable(priv, EC_CODEC_CAP_WOV_LANG_SHM))
ret = wov_set_lang_shm(priv, buf, size, digest);
else
ret = wov_set_lang(priv, buf, size, digest);
leave:
kfree(buf);
return ret;
}
static struct snd_kcontrol_new wov_controls[] = {
SOC_SINGLE_BOOL_EXT("Wake-on-Voice Switch", 0,
wov_enable_get, wov_enable_put),
SND_SOC_BYTES_TLV("Hotword Model", 0x11000, NULL,
wov_hotword_model_put),
};
static struct snd_soc_dai_driver wov_dai_driver = {
.name = "Wake on Voice",
.capture = {
.stream_name = "WoV Capture",
.channels_min = 1,
.channels_max = 1,
.rates = SNDRV_PCM_RATE_16000,
.formats = SNDRV_PCM_FMTBIT_S16_LE,
},
};
static int wov_host_event(struct notifier_block *nb,
unsigned long queued_during_suspend, void *notify)
{
struct cros_ec_codec_priv *priv =
container_of(nb, struct cros_ec_codec_priv, wov_notifier);
u32 host_event;
dev_dbg(priv->dev, "%s\n", __func__);
host_event = cros_ec_get_host_event(priv->ec_device);
if (host_event & EC_HOST_EVENT_MASK(EC_HOST_EVENT_WOV)) {
schedule_delayed_work(&priv->wov_copy_work, 0);
return NOTIFY_OK;
} else {
return NOTIFY_DONE;
}
}
static int wov_probe(struct snd_soc_component *component)
{
struct cros_ec_codec_priv *priv =
snd_soc_component_get_drvdata(component);
int ret;
mutex_init(&priv->wov_dma_lock);
INIT_DELAYED_WORK(&priv->wov_copy_work, wov_copy_work);
priv->wov_notifier.notifier_call = wov_host_event;
ret = blocking_notifier_chain_register(
&priv->ec_device->event_notifier, &priv->wov_notifier);
if (ret)
return ret;
if (ec_codec_capable(priv, EC_CODEC_CAP_WOV_LANG_SHM)) {
priv->wov_lang_shm_p = wov_map_shm(priv,
EC_CODEC_SHM_ID_WOV_LANG,
&priv->wov_lang_shm_len,
&priv->wov_lang_shm_type);
if (!priv->wov_lang_shm_p)
return -EFAULT;
}
if (ec_codec_capable(priv, EC_CODEC_CAP_WOV_AUDIO_SHM)) {
priv->wov_audio_shm_p = wov_map_shm(priv,
EC_CODEC_SHM_ID_WOV_AUDIO,
&priv->wov_audio_shm_len,
&priv->wov_audio_shm_type);
if (!priv->wov_audio_shm_p)
return -EFAULT;
}
return dmic_probe(component);
}
static void wov_remove(struct snd_soc_component *component)
{
struct cros_ec_codec_priv *priv =
snd_soc_component_get_drvdata(component);
blocking_notifier_chain_unregister(
&priv->ec_device->event_notifier, &priv->wov_notifier);
}
static int wov_pcm_open(struct snd_soc_component *component,
struct snd_pcm_substream *substream)
{
static const struct snd_pcm_hardware hw_param = {
.info = SNDRV_PCM_INFO_MMAP |
SNDRV_PCM_INFO_INTERLEAVED |
SNDRV_PCM_INFO_MMAP_VALID,
.formats = SNDRV_PCM_FMTBIT_S16_LE,
.rates = SNDRV_PCM_RATE_16000,
.channels_min = 1,
.channels_max = 1,
.period_bytes_min = PAGE_SIZE,
.period_bytes_max = 0x20000 / 8,
.periods_min = 8,
.periods_max = 8,
.buffer_bytes_max = 0x20000,
};
return snd_soc_set_runtime_hwparams(substream, &hw_param);
}
static int wov_pcm_hw_params(struct snd_soc_component *component,
struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *hw_params)
{
struct cros_ec_codec_priv *priv =
snd_soc_component_get_drvdata(component);
mutex_lock(&priv->wov_dma_lock);
priv->wov_substream = substream;
priv->wov_rp = priv->wov_wp = 0;
priv->wov_dma_offset = 0;
priv->wov_burst_read = true;
mutex_unlock(&priv->wov_dma_lock);
return 0;
}
static int wov_pcm_hw_free(struct snd_soc_component *component,
struct snd_pcm_substream *substream)
{
struct cros_ec_codec_priv *priv =
snd_soc_component_get_drvdata(component);
mutex_lock(&priv->wov_dma_lock);
wov_queue_dequeue(priv, wov_queue_size(priv));
priv->wov_substream = NULL;
mutex_unlock(&priv->wov_dma_lock);
cancel_delayed_work_sync(&priv->wov_copy_work);
return 0;
}
static snd_pcm_uframes_t wov_pcm_pointer(struct snd_soc_component *component,
struct snd_pcm_substream *substream)
{
struct snd_pcm_runtime *runtime = substream->runtime;
struct cros_ec_codec_priv *priv =
snd_soc_component_get_drvdata(component);
return bytes_to_frames(runtime, priv->wov_dma_offset);
}
static int wov_pcm_new(struct snd_soc_component *component,
struct snd_soc_pcm_runtime *rtd)
{
snd_pcm_set_managed_buffer_all(rtd->pcm, SNDRV_DMA_TYPE_VMALLOC,
NULL, 0, 0);
return 0;
}
static const struct snd_soc_component_driver wov_component_driver = {
.probe = wov_probe,
.remove = wov_remove,
.controls = wov_controls,
.num_controls = ARRAY_SIZE(wov_controls),
.open = wov_pcm_open,
.hw_params = wov_pcm_hw_params,
.hw_free = wov_pcm_hw_free,
.pointer = wov_pcm_pointer,
.pcm_construct = wov_pcm_new,
};
static int cros_ec_codec_platform_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct cros_ec_device *ec_device = dev_get_drvdata(pdev->dev.parent);
struct cros_ec_codec_priv *priv;
struct ec_param_ec_codec p;
struct ec_response_ec_codec_get_capabilities r;
int ret;
#ifdef CONFIG_OF
struct device_node *node;
struct resource res;
u64 ec_shm_size;
const __be32 *regaddr_p;
#endif
priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
if (!priv)
return -ENOMEM;
#ifdef CONFIG_OF
regaddr_p = of_get_address(dev->of_node, 0, &ec_shm_size, NULL);
if (regaddr_p) {
priv->ec_shm_addr = of_read_number(regaddr_p, 2);
priv->ec_shm_len = ec_shm_size;
dev_dbg(dev, "ec_shm_addr=%#llx len=%#x\n",
priv->ec_shm_addr, priv->ec_shm_len);
}
node = of_parse_phandle(dev->of_node, "memory-region", 0);
if (node) {
ret = of_address_to_resource(node, 0, &res);
if (!ret) {
priv->ap_shm_phys_addr = res.start;
priv->ap_shm_len = resource_size(&res);
priv->ap_shm_addr =
(uint64_t)(uintptr_t)devm_ioremap_wc(
dev, priv->ap_shm_phys_addr,
priv->ap_shm_len);
priv->ap_shm_last_alloc = priv->ap_shm_phys_addr;
dev_dbg(dev, "ap_shm_phys_addr=%#llx len=%#x\n",
priv->ap_shm_phys_addr, priv->ap_shm_len);
}
of_node_put(node);
}
#endif
priv->dev = dev;
priv->ec_device = ec_device;
atomic_set(&priv->dmic_probed, 0);
p.cmd = EC_CODEC_GET_CAPABILITIES;
ret = send_ec_host_command(priv->ec_device, EC_CMD_EC_CODEC,
(uint8_t *)&p, sizeof(p),
(uint8_t *)&r, sizeof(r));
if (ret) {
dev_err(dev, "failed to EC_CODEC_GET_CAPABILITIES\n");
return ret;
}
priv->ec_capabilities = r.capabilities;
/* Reset EC codec i2s rx. */
p.cmd = EC_CODEC_I2S_RX_RESET;
ret = send_ec_host_command(priv->ec_device, EC_CMD_EC_CODEC_I2S_RX,
(uint8_t *)&p, sizeof(p), NULL, 0);
if (ret == -ENOPROTOOPT) {
dev_info(dev,
"Missing reset command. Please update EC firmware.\n");
} else if (ret) {
dev_err(dev, "failed to EC_CODEC_I2S_RESET: %d\n", ret);
return ret;
}
platform_set_drvdata(pdev, priv);
ret = devm_snd_soc_register_component(dev, &i2s_rx_component_driver,
&i2s_rx_dai_driver, 1);
if (ret)
return ret;
return devm_snd_soc_register_component(dev, &wov_component_driver,
&wov_dai_driver, 1);
}
#ifdef CONFIG_OF
static const struct of_device_id cros_ec_codec_of_match[] = {
{ .compatible = "google,cros-ec-codec" },
{},
};
MODULE_DEVICE_TABLE(of, cros_ec_codec_of_match);
#endif
#ifdef CONFIG_ACPI
static const struct acpi_device_id cros_ec_codec_acpi_id[] = {
{ "GOOG0013", 0 },
{ }
};
MODULE_DEVICE_TABLE(acpi, cros_ec_codec_acpi_id);
#endif
static struct platform_driver cros_ec_codec_platform_driver = {
.driver = {
.name = "cros-ec-codec",
.of_match_table = of_match_ptr(cros_ec_codec_of_match),
.acpi_match_table = ACPI_PTR(cros_ec_codec_acpi_id),
},
.probe = cros_ec_codec_platform_probe,
};
module_platform_driver(cros_ec_codec_platform_driver);
MODULE_LICENSE("GPL v2");
MODULE_DESCRIPTION("ChromeOS EC codec driver");
MODULE_AUTHOR("Cheng-Yi Chiang <[email protected]>");
MODULE_ALIAS("platform:cros-ec-codec");
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