* 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>
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)
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)
{
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,
.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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