[alsa-devel] [PATCH v5 1/4] ASoC: cros_ec_codec: support WoV
Enric Balletbo i Serra
enric.balletbo at collabora.com
Mon Oct 21 13:26:04 CEST 2019
Hi,
On 19/10/19 9:02, Tzung-Bi Shih wrote:
> 1. Get EC codec's capabilities.
> 2. Get and set SHM address if any.
> 3. Transmit language model to EC codec if needed.
> 4. Start to read audio data from EC codec if receives host event.
>
> Signed-off-by: Tzung-Bi Shih <tzungbi at google.com>
> ---
> drivers/platform/chrome/cros_ec_trace.c | 1 +
> .../linux/platform_data/cros_ec_commands.h | 69 ++
For the chrome/platform side.
Acked-by: Enric Balletbo i Serra <enric.balletbo at collabora.com>
Mark, once applied, could we get an immutable branch from you containing the
following already applied patches + this series? We need as we have patches that
could conflict on platform/chrome.
3fe5a963c631 ASoC: dt-bindings: cros_ec_codec: add SHM bindings
f3e82ad43ca5 ASoC: cros_ec_codec: read max DMIC gain from EC codec
104c6f8f7ff8 platform/chrome: cros_ec: add common commands for EC codec
8f731d4c92c2 ASoC: cros_ec_codec: extract DMIC EC command from I2S RX
727f1c71c780 ASoC: cros_ec_codec: refactor I2S RX
036beb0e85f8 platform/chrome: cros_ec: remove unused EC feature
Thanks,
Enric.
> sound/soc/codecs/Kconfig | 2 +
> sound/soc/codecs/cros_ec_codec.c | 700 +++++++++++++++++-
> 4 files changed, 770 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/platform/chrome/cros_ec_trace.c b/drivers/platform/chrome/cros_ec_trace.c
> index 2ea0d4e0d54d..5af1d66d9eca 100644
> --- a/drivers/platform/chrome/cros_ec_trace.c
> +++ b/drivers/platform/chrome/cros_ec_trace.c
> @@ -101,6 +101,7 @@
> TRACE_SYMBOL(EC_CMD_EC_CODEC), \
> TRACE_SYMBOL(EC_CMD_EC_CODEC_DMIC), \
> TRACE_SYMBOL(EC_CMD_EC_CODEC_I2S_RX), \
> + TRACE_SYMBOL(EC_CMD_EC_CODEC_WOV), \
> 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 21db0d4d4025..69210881ebac 100644
> --- a/include/linux/platform_data/cros_ec_commands.h
> +++ b/include/linux/platform_data/cros_ec_commands.h
> @@ -556,6 +556,9 @@ enum host_event_code {
> /* Keyboard recovery combo with hardware reinitialization */
> EC_HOST_EVENT_KEYBOARD_RECOVERY_HW_REINIT = 30,
>
> + /* WoV */
> + EC_HOST_EVENT_WOV = 31,
> +
> /*
> * The high bit of the event mask is not used as a host event code. If
> * it reads back as set, then the entire event mask should be
> @@ -4477,10 +4480,14 @@ enum ec_codec_subcmd {
> };
>
> enum ec_codec_cap {
> + EC_CODEC_CAP_WOV_AUDIO_SHM = 0,
> + EC_CODEC_CAP_WOV_LANG_SHM = 1,
> EC_CODEC_CAP_LAST = 32,
> };
>
> enum ec_codec_shm_id {
> + EC_CODEC_SHM_ID_WOV_AUDIO = 0x0,
> + EC_CODEC_SHM_ID_WOV_LANG = 0x1,
> EC_CODEC_SHM_ID_LAST,
> };
>
> @@ -4641,6 +4648,68 @@ struct __ec_align4 ec_param_ec_codec_i2s_rx {
> };
> };
>
> +/*****************************************************************************/
> +/* Commands for WoV on audio codec. */
> +
> +#define EC_CMD_EC_CODEC_WOV 0x00BF
> +
> +enum ec_codec_wov_subcmd {
> + EC_CODEC_WOV_SET_LANG = 0x0,
> + EC_CODEC_WOV_SET_LANG_SHM = 0x1,
> + EC_CODEC_WOV_GET_LANG = 0x2,
> + EC_CODEC_WOV_ENABLE = 0x3,
> + EC_CODEC_WOV_DISABLE = 0x4,
> + EC_CODEC_WOV_READ_AUDIO = 0x5,
> + EC_CODEC_WOV_READ_AUDIO_SHM = 0x6,
> + EC_CODEC_WOV_SUBCMD_COUNT,
> +};
> +
> +/*
> + * @hash is SHA256 of the whole language model.
> + * @total_len indicates the length of whole language model.
> + * @offset is the cursor from the beginning of the model.
> + * @buf is the packet buffer.
> + * @len denotes how many bytes in the buf.
> + */
> +struct __ec_align4 ec_param_ec_codec_wov_set_lang {
> + uint8_t hash[32];
> + uint32_t total_len;
> + uint32_t offset;
> + uint8_t buf[128];
> + uint32_t len;
> +};
> +
> +struct __ec_align4 ec_param_ec_codec_wov_set_lang_shm {
> + uint8_t hash[32];
> + uint32_t total_len;
> +};
> +
> +struct __ec_align4 ec_param_ec_codec_wov {
> + uint8_t cmd; /* enum ec_codec_wov_subcmd */
> + uint8_t reserved[3];
> +
> + union {
> + struct ec_param_ec_codec_wov_set_lang
> + set_lang_param;
> + struct ec_param_ec_codec_wov_set_lang_shm
> + set_lang_shm_param;
> + };
> +};
> +
> +struct __ec_align4 ec_response_ec_codec_wov_get_lang {
> + uint8_t hash[32];
> +};
> +
> +struct __ec_align4 ec_response_ec_codec_wov_read_audio {
> + uint8_t buf[128];
> + uint32_t len;
> +};
> +
> +struct __ec_align4 ec_response_ec_codec_wov_read_audio_shm {
> + uint32_t offset;
> + uint32_t len;
> +};
> +
> /*****************************************************************************/
> /* System commands */
>
> diff --git a/sound/soc/codecs/Kconfig b/sound/soc/codecs/Kconfig
> index 5a706102db04..1a4b084cc90d 100644
> --- a/sound/soc/codecs/Kconfig
> +++ b/sound/soc/codecs/Kconfig
> @@ -509,6 +509,8 @@ config SND_SOC_CQ0093VC
> config SND_SOC_CROS_EC_CODEC
> tristate "codec driver for ChromeOS EC"
> depends on CROS_EC
> + select CRYPTO
> + select CRYPTO_SHA256
> help
> If you say yes here you will get support for the
> ChromeOS Embedded Controller's Audio Codec.
> diff --git a/sound/soc/codecs/cros_ec_codec.c b/sound/soc/codecs/cros_ec_codec.c
> index 3d4f9e82d6e9..dd14caf9091a 100644
> --- a/sound/soc/codecs/cros_ec_codec.c
> +++ b/sound/soc/codecs/cros_ec_codec.c
> @@ -8,10 +8,16 @@
> * EC for audio function.
> */
>
> +#include <crypto/hash.h>
> +#include <crypto/sha.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>
> @@ -23,8 +29,45 @@
> 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;
> +
> + /* 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)
> @@ -57,6 +100,41 @@ static int send_ec_host_command(struct cros_ec_device *ec_dev, uint32_t cmd,
> return ret;
> }
>
> +static int calculate_sha256(struct cros_ec_codec_priv *priv,
> + uint8_t *buf, uint32_t size, uint8_t *digest)
> +{
> + struct crypto_shash *tfm;
> +
> + tfm = crypto_alloc_shash("sha256", CRYPTO_ALG_TYPE_SHASH, 0);
> + if (IS_ERR(tfm)) {
> + dev_err(priv->dev, "can't alloc shash\n");
> + return PTR_ERR(tfm);
> + }
> +
> + {
> + SHASH_DESC_ON_STACK(desc, tfm);
> +
> + desc->tfm = tfm;
> +
> + crypto_shash_digest(desc, buf, size, digest);
> + shash_desc_zero(desc);
> + }
> +
> + crypto_free_shash(tfm);
> +
> +#ifdef DEBUG
> + {
> + char digest_str[65];
> +
> + bin2hex(digest_str, digest, 32);
> + digest_str[64] = 0;
> + dev_dbg(priv->dev, "hash=%s\n", digest_str);
> + }
> +#endif
> +
> + return 0;
> +}
> +
> static int dmic_get_gain(struct snd_kcontrol *kcontrol,
> struct snd_ctl_elem_value *ucontrol)
> {
> @@ -147,6 +225,9 @@ static int dmic_probe(struct snd_soc_component *component)
> 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,
> @@ -324,23 +405,638 @@ static const struct snd_soc_component_driver i2s_rx_component_driver = {
> .num_dapm_routes = ARRAY_SIZE(i2s_rx_dapm_routes),
> };
>
> +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);
> +
> + ret = calculate_sha256(priv, buf, size, digest);
> + if (ret)
> + goto leave;
> +
> + 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 snd_pcm_lib_alloc_vmalloc_buffer(substream,
> + params_buffer_bytes(hw_params));
> +}
> +
> +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 snd_pcm_lib_free_vmalloc_buffer(substream);
> +}
> +
> +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 struct page *wov_pcm_page(struct snd_soc_component *component,
> + struct snd_pcm_substream *substream,
> + unsigned long offset)
> +{
> + return snd_pcm_lib_get_vmalloc_page(substream, offset);
> +}
> +
> +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,
> + .page = wov_pcm_page,
> +};
> +
> 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);
> + }
> + }
> +#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;
>
> platform_set_drvdata(pdev, priv);
>
> - return devm_snd_soc_register_component(dev, &i2s_rx_component_driver,
> - &i2s_rx_dai_driver, 1);
> + 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
>
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