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157c4df677
Cppcheck complains of a possible issue: sound/soc/codecs/cros_ec_codec.c:98:10: warning: Possible null pointer dereference: in [nullPointer] memcpy(in, msg->data, insize); ^ sound/soc/codecs/cros_ec_codec.c:162:34: note: Calling function 'send_ec_host_command', 5th argument 'NULL' value is 0 (uint8_t *)&p, sizeof(p), NULL, 0); ^ sound/soc/codecs/cros_ec_codec.c:98:10: note: Null pointer dereference memcpy(in, msg->data, insize); ^ In practice the access to the pointer is protected by another argument, but this is likely to fool other static analysis tools. Add a test to avoid doing the memcpy if the pointer is NULL or the size is zero. Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> Acked-by: Enric Balletbo i Serra <enric.balletbo@collabora.com> Link: https://lore.kernel.org/r/20210312182246.5153-5-pierre-louis.bossart@linux.intel.com Signed-off-by: Mark Brown <broonie@kernel.org>
1068 lines
27 KiB
C
1068 lines
27 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright 2019 Google, Inc.
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*
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* ChromeOS Embedded Controller codec driver.
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*
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* This driver uses the cros-ec interface to communicate with the ChromeOS
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* EC for audio function.
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*/
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#include <crypto/sha2.h>
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#include <linux/acpi.h>
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#include <linux/delay.h>
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#include <linux/device.h>
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#include <linux/io.h>
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#include <linux/jiffies.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/of.h>
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#include <linux/of_address.h>
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#include <linux/platform_data/cros_ec_commands.h>
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#include <linux/platform_data/cros_ec_proto.h>
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#include <linux/platform_device.h>
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#include <sound/pcm.h>
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#include <sound/pcm_params.h>
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#include <sound/soc.h>
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#include <sound/tlv.h>
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struct cros_ec_codec_priv {
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struct device *dev;
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struct cros_ec_device *ec_device;
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/* common */
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uint32_t ec_capabilities;
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uint64_t ec_shm_addr;
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uint32_t ec_shm_len;
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uint64_t ap_shm_phys_addr;
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uint32_t ap_shm_len;
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uint64_t ap_shm_addr;
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uint64_t ap_shm_last_alloc;
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/* DMIC */
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atomic_t dmic_probed;
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/* I2S_RX */
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uint32_t i2s_rx_bclk_ratio;
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/* WoV */
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bool wov_enabled;
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uint8_t *wov_audio_shm_p;
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uint32_t wov_audio_shm_len;
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uint8_t wov_audio_shm_type;
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uint8_t *wov_lang_shm_p;
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uint32_t wov_lang_shm_len;
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uint8_t wov_lang_shm_type;
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struct mutex wov_dma_lock;
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uint8_t wov_buf[64000];
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uint32_t wov_rp, wov_wp;
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size_t wov_dma_offset;
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bool wov_burst_read;
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struct snd_pcm_substream *wov_substream;
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struct delayed_work wov_copy_work;
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struct notifier_block wov_notifier;
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};
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static int ec_codec_capable(struct cros_ec_codec_priv *priv, uint8_t cap)
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{
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return priv->ec_capabilities & BIT(cap);
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}
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static int send_ec_host_command(struct cros_ec_device *ec_dev, uint32_t cmd,
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uint8_t *out, size_t outsize,
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uint8_t *in, size_t insize)
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{
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int ret;
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struct cros_ec_command *msg;
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msg = kmalloc(sizeof(*msg) + max(outsize, insize), GFP_KERNEL);
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if (!msg)
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return -ENOMEM;
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msg->version = 0;
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msg->command = cmd;
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msg->outsize = outsize;
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msg->insize = insize;
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if (outsize)
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memcpy(msg->data, out, outsize);
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ret = cros_ec_cmd_xfer_status(ec_dev, msg);
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if (ret < 0)
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goto error;
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if (in && insize)
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memcpy(in, msg->data, insize);
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ret = 0;
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error:
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kfree(msg);
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return ret;
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}
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static int dmic_get_gain(struct snd_kcontrol *kcontrol,
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struct snd_ctl_elem_value *ucontrol)
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{
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struct snd_soc_component *component =
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snd_soc_kcontrol_component(kcontrol);
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struct cros_ec_codec_priv *priv =
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snd_soc_component_get_drvdata(component);
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struct ec_param_ec_codec_dmic p;
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struct ec_response_ec_codec_dmic_get_gain_idx r;
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int ret;
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p.cmd = EC_CODEC_DMIC_GET_GAIN_IDX;
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p.get_gain_idx_param.channel = EC_CODEC_DMIC_CHANNEL_0;
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ret = send_ec_host_command(priv->ec_device, EC_CMD_EC_CODEC_DMIC,
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(uint8_t *)&p, sizeof(p),
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(uint8_t *)&r, sizeof(r));
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if (ret < 0)
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return ret;
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ucontrol->value.integer.value[0] = r.gain;
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p.cmd = EC_CODEC_DMIC_GET_GAIN_IDX;
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p.get_gain_idx_param.channel = EC_CODEC_DMIC_CHANNEL_1;
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ret = send_ec_host_command(priv->ec_device, EC_CMD_EC_CODEC_DMIC,
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(uint8_t *)&p, sizeof(p),
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(uint8_t *)&r, sizeof(r));
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if (ret < 0)
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return ret;
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ucontrol->value.integer.value[1] = r.gain;
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return 0;
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}
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static int dmic_put_gain(struct snd_kcontrol *kcontrol,
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struct snd_ctl_elem_value *ucontrol)
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{
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struct snd_soc_component *component =
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snd_soc_kcontrol_component(kcontrol);
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struct cros_ec_codec_priv *priv =
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snd_soc_component_get_drvdata(component);
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struct soc_mixer_control *control =
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(struct soc_mixer_control *)kcontrol->private_value;
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int max_dmic_gain = control->max;
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int left = ucontrol->value.integer.value[0];
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int right = ucontrol->value.integer.value[1];
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struct ec_param_ec_codec_dmic p;
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int ret;
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if (left > max_dmic_gain || right > max_dmic_gain)
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return -EINVAL;
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dev_dbg(component->dev, "set mic gain to %u, %u\n", left, right);
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p.cmd = EC_CODEC_DMIC_SET_GAIN_IDX;
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p.set_gain_idx_param.channel = EC_CODEC_DMIC_CHANNEL_0;
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p.set_gain_idx_param.gain = left;
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ret = send_ec_host_command(priv->ec_device, EC_CMD_EC_CODEC_DMIC,
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(uint8_t *)&p, sizeof(p), NULL, 0);
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if (ret < 0)
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return ret;
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p.cmd = EC_CODEC_DMIC_SET_GAIN_IDX;
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p.set_gain_idx_param.channel = EC_CODEC_DMIC_CHANNEL_1;
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p.set_gain_idx_param.gain = right;
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return send_ec_host_command(priv->ec_device, EC_CMD_EC_CODEC_DMIC,
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(uint8_t *)&p, sizeof(p), NULL, 0);
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}
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static const DECLARE_TLV_DB_SCALE(dmic_gain_tlv, 0, 100, 0);
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enum {
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DMIC_CTL_GAIN = 0,
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};
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static struct snd_kcontrol_new dmic_controls[] = {
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[DMIC_CTL_GAIN] =
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SOC_DOUBLE_EXT_TLV("EC Mic Gain", SND_SOC_NOPM, SND_SOC_NOPM,
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0, 0, 0, dmic_get_gain, dmic_put_gain,
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dmic_gain_tlv),
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};
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static int dmic_probe(struct snd_soc_component *component)
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{
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struct cros_ec_codec_priv *priv =
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snd_soc_component_get_drvdata(component);
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struct device *dev = priv->dev;
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struct soc_mixer_control *control;
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struct ec_param_ec_codec_dmic p;
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struct ec_response_ec_codec_dmic_get_max_gain r;
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int ret;
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if (!atomic_add_unless(&priv->dmic_probed, 1, 1))
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return 0;
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p.cmd = EC_CODEC_DMIC_GET_MAX_GAIN;
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ret = send_ec_host_command(priv->ec_device, EC_CMD_EC_CODEC_DMIC,
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(uint8_t *)&p, sizeof(p),
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(uint8_t *)&r, sizeof(r));
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if (ret < 0) {
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dev_warn(dev, "get_max_gain() unsupported\n");
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return 0;
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}
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dev_dbg(dev, "max gain = %d\n", r.max_gain);
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control = (struct soc_mixer_control *)
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dmic_controls[DMIC_CTL_GAIN].private_value;
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control->max = r.max_gain;
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control->platform_max = r.max_gain;
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return snd_soc_add_component_controls(component,
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&dmic_controls[DMIC_CTL_GAIN], 1);
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}
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static int i2s_rx_hw_params(struct snd_pcm_substream *substream,
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struct snd_pcm_hw_params *params,
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struct snd_soc_dai *dai)
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{
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struct snd_soc_component *component = dai->component;
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struct cros_ec_codec_priv *priv =
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snd_soc_component_get_drvdata(component);
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struct ec_param_ec_codec_i2s_rx p;
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enum ec_codec_i2s_rx_sample_depth depth;
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uint32_t bclk;
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int ret;
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if (params_rate(params) != 48000)
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return -EINVAL;
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switch (params_format(params)) {
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case SNDRV_PCM_FORMAT_S16_LE:
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depth = EC_CODEC_I2S_RX_SAMPLE_DEPTH_16;
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break;
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case SNDRV_PCM_FORMAT_S24_LE:
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depth = EC_CODEC_I2S_RX_SAMPLE_DEPTH_24;
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break;
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default:
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return -EINVAL;
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}
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dev_dbg(component->dev, "set depth to %u\n", depth);
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p.cmd = EC_CODEC_I2S_RX_SET_SAMPLE_DEPTH;
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p.set_sample_depth_param.depth = depth;
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ret = send_ec_host_command(priv->ec_device, EC_CMD_EC_CODEC_I2S_RX,
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(uint8_t *)&p, sizeof(p), NULL, 0);
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if (ret < 0)
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return ret;
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if (priv->i2s_rx_bclk_ratio)
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bclk = params_rate(params) * priv->i2s_rx_bclk_ratio;
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else
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bclk = snd_soc_params_to_bclk(params);
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dev_dbg(component->dev, "set bclk to %u\n", bclk);
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p.cmd = EC_CODEC_I2S_RX_SET_BCLK;
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p.set_bclk_param.bclk = bclk;
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return send_ec_host_command(priv->ec_device, EC_CMD_EC_CODEC_I2S_RX,
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(uint8_t *)&p, sizeof(p), NULL, 0);
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}
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static int i2s_rx_set_bclk_ratio(struct snd_soc_dai *dai, unsigned int ratio)
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{
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struct snd_soc_component *component = dai->component;
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struct cros_ec_codec_priv *priv =
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snd_soc_component_get_drvdata(component);
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priv->i2s_rx_bclk_ratio = ratio;
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return 0;
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}
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static int i2s_rx_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
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{
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struct snd_soc_component *component = dai->component;
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struct cros_ec_codec_priv *priv =
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snd_soc_component_get_drvdata(component);
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struct ec_param_ec_codec_i2s_rx p;
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enum ec_codec_i2s_rx_daifmt daifmt;
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switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
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case SND_SOC_DAIFMT_CBS_CFS:
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break;
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default:
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return -EINVAL;
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}
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switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
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case SND_SOC_DAIFMT_NB_NF:
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break;
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default:
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return -EINVAL;
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}
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switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
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case SND_SOC_DAIFMT_I2S:
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daifmt = EC_CODEC_I2S_RX_DAIFMT_I2S;
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break;
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case SND_SOC_DAIFMT_RIGHT_J:
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daifmt = EC_CODEC_I2S_RX_DAIFMT_RIGHT_J;
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break;
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case SND_SOC_DAIFMT_LEFT_J:
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daifmt = EC_CODEC_I2S_RX_DAIFMT_LEFT_J;
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break;
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default:
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return -EINVAL;
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}
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dev_dbg(component->dev, "set format to %u\n", daifmt);
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p.cmd = EC_CODEC_I2S_RX_SET_DAIFMT;
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p.set_daifmt_param.daifmt = daifmt;
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return send_ec_host_command(priv->ec_device, EC_CMD_EC_CODEC_I2S_RX,
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(uint8_t *)&p, sizeof(p), NULL, 0);
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}
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static const struct snd_soc_dai_ops i2s_rx_dai_ops = {
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.hw_params = i2s_rx_hw_params,
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.set_fmt = i2s_rx_set_fmt,
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.set_bclk_ratio = i2s_rx_set_bclk_ratio,
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};
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static int i2s_rx_event(struct snd_soc_dapm_widget *w,
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struct snd_kcontrol *kcontrol, int event)
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{
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struct snd_soc_component *component =
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snd_soc_dapm_to_component(w->dapm);
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struct cros_ec_codec_priv *priv =
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snd_soc_component_get_drvdata(component);
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struct ec_param_ec_codec_i2s_rx p = {};
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switch (event) {
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case SND_SOC_DAPM_PRE_PMU:
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dev_dbg(component->dev, "enable I2S RX\n");
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p.cmd = EC_CODEC_I2S_RX_ENABLE;
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break;
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case SND_SOC_DAPM_PRE_PMD:
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dev_dbg(component->dev, "disable I2S RX\n");
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p.cmd = EC_CODEC_I2S_RX_DISABLE;
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break;
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default:
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return 0;
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}
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return send_ec_host_command(priv->ec_device, EC_CMD_EC_CODEC_I2S_RX,
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(uint8_t *)&p, sizeof(p), NULL, 0);
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}
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static struct snd_soc_dapm_widget i2s_rx_dapm_widgets[] = {
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SND_SOC_DAPM_INPUT("DMIC"),
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SND_SOC_DAPM_SUPPLY("I2S RX Enable", SND_SOC_NOPM, 0, 0, i2s_rx_event,
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SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_PRE_PMD),
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SND_SOC_DAPM_AIF_OUT("I2S RX", "I2S Capture", 0, SND_SOC_NOPM, 0, 0),
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};
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static struct snd_soc_dapm_route i2s_rx_dapm_routes[] = {
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{"I2S RX", NULL, "DMIC"},
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{"I2S RX", NULL, "I2S RX Enable"},
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};
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static struct snd_soc_dai_driver i2s_rx_dai_driver = {
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.name = "EC Codec I2S RX",
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.capture = {
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.stream_name = "I2S Capture",
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.channels_min = 2,
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.channels_max = 2,
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.rates = SNDRV_PCM_RATE_48000,
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.formats = SNDRV_PCM_FMTBIT_S16_LE |
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SNDRV_PCM_FMTBIT_S24_LE,
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},
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.ops = &i2s_rx_dai_ops,
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};
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static int i2s_rx_probe(struct snd_soc_component *component)
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{
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return dmic_probe(component);
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}
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static const struct snd_soc_component_driver i2s_rx_component_driver = {
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.probe = i2s_rx_probe,
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.dapm_widgets = i2s_rx_dapm_widgets,
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.num_dapm_widgets = ARRAY_SIZE(i2s_rx_dapm_widgets),
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.dapm_routes = i2s_rx_dapm_routes,
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.num_dapm_routes = ARRAY_SIZE(i2s_rx_dapm_routes),
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};
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static void *wov_map_shm(struct cros_ec_codec_priv *priv,
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uint8_t shm_id, uint32_t *len, uint8_t *type)
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{
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struct ec_param_ec_codec p;
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struct ec_response_ec_codec_get_shm_addr r;
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uint32_t req, offset;
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p.cmd = EC_CODEC_GET_SHM_ADDR;
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p.get_shm_addr_param.shm_id = shm_id;
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if (send_ec_host_command(priv->ec_device, EC_CMD_EC_CODEC,
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(uint8_t *)&p, sizeof(p),
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(uint8_t *)&r, sizeof(r)) < 0) {
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dev_err(priv->dev, "failed to EC_CODEC_GET_SHM_ADDR\n");
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return NULL;
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}
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dev_dbg(priv->dev, "phys_addr=%#llx, len=%#x\n", r.phys_addr, r.len);
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*len = r.len;
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*type = r.type;
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switch (r.type) {
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case EC_CODEC_SHM_TYPE_EC_RAM:
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return (void __force *)devm_ioremap_wc(priv->dev,
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r.phys_addr + priv->ec_shm_addr, r.len);
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case EC_CODEC_SHM_TYPE_SYSTEM_RAM:
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if (r.phys_addr) {
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dev_err(priv->dev, "unknown status\n");
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return NULL;
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}
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req = round_up(r.len, PAGE_SIZE);
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dev_dbg(priv->dev, "round up from %u to %u\n", r.len, req);
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if (priv->ap_shm_last_alloc + req >
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priv->ap_shm_phys_addr + priv->ap_shm_len) {
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dev_err(priv->dev, "insufficient space for AP SHM\n");
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return NULL;
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}
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dev_dbg(priv->dev, "alloc AP SHM addr=%#llx, len=%#x\n",
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priv->ap_shm_last_alloc, req);
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p.cmd = EC_CODEC_SET_SHM_ADDR;
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p.set_shm_addr_param.phys_addr = priv->ap_shm_last_alloc;
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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);
|
|
}
|
|
}
|
|
#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 <cychiang@chromium.org>");
|
|
MODULE_ALIAS("platform:cros-ec-codec");
|