1 // SPDX-License-Identifier: GPL-2.0
5  * ChromeOS Embedded Controller codec driver.
7  * This driver uses the cros-ec interface to communicate with the ChromeOS
8  * EC for audio function.
73 	return priv->ec_capabilities & BIT(cap);  in ec_codec_capable()
85 		return -ENOMEM;  in send_ec_host_command()
87 	msg->version = 0;  in send_ec_host_command()
88 	msg->command = cmd;  in send_ec_host_command()
89 	msg->outsize = outsize;  in send_ec_host_command()
90 	msg->insize = insize;  in send_ec_host_command()
93 		memcpy(msg->data, out, outsize);  in send_ec_host_command()
100 		memcpy(in, msg->data, insize);  in send_ec_host_command()
121 	ret = send_ec_host_command(priv->ec_device, EC_CMD_EC_CODEC_DMIC,  in dmic_get_gain()
126 	ucontrol->value.integer.value[0] = r.gain;  in dmic_get_gain()
130 	ret = send_ec_host_command(priv->ec_device, EC_CMD_EC_CODEC_DMIC,  in dmic_get_gain()
135 	ucontrol->value.integer.value[1] = r.gain;  in dmic_get_gain()
148 		(struct soc_mixer_control *)kcontrol->private_value;  in dmic_put_gain()
149 	int max_dmic_gain = control->max;  in dmic_put_gain()
150 	int left = ucontrol->value.integer.value[0];  in dmic_put_gain()
151 	int right = ucontrol->value.integer.value[1];  in dmic_put_gain()
156 		return -EINVAL;  in dmic_put_gain()
158 	dev_dbg(component->dev, "set mic gain to %u, %u\n", left, right);  in dmic_put_gain()
163 	ret = send_ec_host_command(priv->ec_device, EC_CMD_EC_CODEC_DMIC,  in dmic_put_gain()
171 	return send_ec_host_command(priv->ec_device, EC_CMD_EC_CODEC_DMIC,  in dmic_put_gain()
183 		SOC_DOUBLE_EXT_TLV("EC Mic Gain", SND_SOC_NOPM, SND_SOC_NOPM,
192 	struct device *dev = priv->dev;  in dmic_probe()
198 	if (!atomic_add_unless(&priv->dmic_probed, 1, 1))  in dmic_probe()
203 	ret = send_ec_host_command(priv->ec_device, EC_CMD_EC_CODEC_DMIC,  in dmic_probe()
215 	control->max = r.max_gain;  in dmic_probe()
216 	control->platform_max = r.max_gain;  in dmic_probe()
226 	struct snd_soc_component *component = dai->component;  in i2s_rx_hw_params()
235 		return -EINVAL;  in i2s_rx_hw_params()
245 		return -EINVAL;  in i2s_rx_hw_params()
248 	dev_dbg(component->dev, "set depth to %u\n", depth);  in i2s_rx_hw_params()
252 	ret = send_ec_host_command(priv->ec_device, EC_CMD_EC_CODEC_I2S_RX,  in i2s_rx_hw_params()
257 	if (priv->i2s_rx_bclk_ratio)  in i2s_rx_hw_params()
258 		bclk = params_rate(params) * priv->i2s_rx_bclk_ratio;  in i2s_rx_hw_params()
262 	dev_dbg(component->dev, "set bclk to %u\n", bclk);  in i2s_rx_hw_params()
266 	return send_ec_host_command(priv->ec_device, EC_CMD_EC_CODEC_I2S_RX,  in i2s_rx_hw_params()
272 	struct snd_soc_component *component = dai->component;  in i2s_rx_set_bclk_ratio()
276 	priv->i2s_rx_bclk_ratio = ratio;  in i2s_rx_set_bclk_ratio()
282 	struct snd_soc_component *component = dai->component;  in i2s_rx_set_fmt()
292 		return -EINVAL;  in i2s_rx_set_fmt()
299 		return -EINVAL;  in i2s_rx_set_fmt()
313 		return -EINVAL;  in i2s_rx_set_fmt()
316 	dev_dbg(component->dev, "set format to %u\n", daifmt);  in i2s_rx_set_fmt()
320 	return send_ec_host_command(priv->ec_device, EC_CMD_EC_CODEC_I2S_RX,  in i2s_rx_set_fmt()
334 		snd_soc_dapm_to_component(w->dapm);  in i2s_rx_event()
341 		dev_dbg(component->dev, "enable I2S RX\n");  in i2s_rx_event()
345 		dev_dbg(component->dev, "disable I2S RX\n");  in i2s_rx_event()
352 	return send_ec_host_command(priv->ec_device, EC_CMD_EC_CODEC_I2S_RX,  in i2s_rx_event()
369 	.name = "EC Codec I2S RX",
404 	if (send_ec_host_command(priv->ec_device, EC_CMD_EC_CODEC,  in wov_map_shm()
407 		dev_err(priv->dev, "failed to EC_CODEC_GET_SHM_ADDR\n");  in wov_map_shm()
411 	dev_dbg(priv->dev, "phys_addr=%#llx, len=%#x\n", r.phys_addr, r.len);  in wov_map_shm()
418 		return (void __force *)devm_ioremap_wc(priv->dev,  in wov_map_shm()
419 				r.phys_addr + priv->ec_shm_addr, r.len);  in wov_map_shm()
422 			dev_err(priv->dev, "unknown status\n");  in wov_map_shm()
427 		dev_dbg(priv->dev, "round up from %u to %u\n", r.len, req);  in wov_map_shm()
429 		if (priv->ap_shm_last_alloc + req >  in wov_map_shm()
430 		    priv->ap_shm_phys_addr + priv->ap_shm_len) {  in wov_map_shm()
431 			dev_err(priv->dev, "insufficient space for AP SHM\n");  in wov_map_shm()
435 		dev_dbg(priv->dev, "alloc AP SHM addr=%#llx, len=%#x\n",  in wov_map_shm()
436 			priv->ap_shm_last_alloc, req);  in wov_map_shm()
439 		p.set_shm_addr_param.phys_addr = priv->ap_shm_last_alloc;  in wov_map_shm()
442 		if (send_ec_host_command(priv->ec_device, EC_CMD_EC_CODEC,  in wov_map_shm()
445 			dev_err(priv->dev, "failed to EC_CODEC_SET_SHM_ADDR\n");  in wov_map_shm()
450 		 * Note: EC codec only requests for `r.len' but we allocate  in wov_map_shm()
453 		offset = priv->ap_shm_last_alloc - priv->ap_shm_phys_addr;  in wov_map_shm()
454 		priv->ap_shm_last_alloc += req;  in wov_map_shm()
456 		return (void *)(uintptr_t)(priv->ap_shm_addr + offset);  in wov_map_shm()
464 	return ((priv->wov_wp + 1) % sizeof(priv->wov_buf)) == priv->wov_rp;  in wov_queue_full()
469 	if (priv->wov_wp >= priv->wov_rp)  in wov_queue_size()
470 		return priv->wov_wp - priv->wov_rp;  in wov_queue_size()
472 		return sizeof(priv->wov_buf) - priv->wov_rp + priv->wov_wp;  in wov_queue_size()
477 	struct snd_pcm_runtime *runtime = priv->wov_substream->runtime;  in wov_queue_dequeue()
481 		req = min(len, runtime->dma_bytes - priv->wov_dma_offset);  in wov_queue_dequeue()
482 		if (priv->wov_wp >= priv->wov_rp)  in wov_queue_dequeue()
483 			req = min(req, (size_t)priv->wov_wp - priv->wov_rp);  in wov_queue_dequeue()
485 			req = min(req, sizeof(priv->wov_buf) - priv->wov_rp);  in wov_queue_dequeue()
487 		memcpy(runtime->dma_area + priv->wov_dma_offset,  in wov_queue_dequeue()
488 		       priv->wov_buf + priv->wov_rp, req);  in wov_queue_dequeue()
490 		priv->wov_dma_offset += req;  in wov_queue_dequeue()
491 		if (priv->wov_dma_offset == runtime->dma_bytes)  in wov_queue_dequeue()
492 			priv->wov_dma_offset = 0;  in wov_queue_dequeue()
494 		priv->wov_rp += req;  in wov_queue_dequeue()
495 		if (priv->wov_rp == sizeof(priv->wov_buf))  in wov_queue_dequeue()
496 			priv->wov_rp = 0;  in wov_queue_dequeue()
498 		len -= req;  in wov_queue_dequeue()
501 	snd_pcm_period_elapsed(priv->wov_substream);  in wov_queue_dequeue()
506 	size_t period_bytes = snd_pcm_lib_period_bytes(priv->wov_substream);  in wov_queue_try_dequeue()
510 		period_bytes = snd_pcm_lib_period_bytes(priv->wov_substream);  in wov_queue_try_dequeue()
524 				dev_err(priv->dev, "overrun detected\n");  in wov_queue_enqueue()
529 		if (priv->wov_wp >= priv->wov_rp)  in wov_queue_enqueue()
530 			req = sizeof(priv->wov_buf) - priv->wov_wp;  in wov_queue_enqueue()
532 			/* Note: waste 1-byte to differentiate full and empty */  in wov_queue_enqueue()
533 			req = priv->wov_rp - priv->wov_wp - 1;  in wov_queue_enqueue()
537 			memcpy_fromio(priv->wov_buf + priv->wov_wp,  in wov_queue_enqueue()
540 			memcpy(priv->wov_buf + priv->wov_wp, addr, req);  in wov_queue_enqueue()
542 		priv->wov_wp += req;  in wov_queue_enqueue()
543 		if (priv->wov_wp == sizeof(priv->wov_buf))  in wov_queue_enqueue()
544 			priv->wov_wp = 0;  in wov_queue_enqueue()
547 		len -= req;  in wov_queue_enqueue()
560 	ret = send_ec_host_command(priv->ec_device, EC_CMD_EC_CODEC_WOV,  in wov_read_audio_shm()
564 		dev_err(priv->dev, "failed to EC_CODEC_WOV_READ_AUDIO_SHM\n");  in wov_read_audio_shm()
569 		dev_dbg(priv->dev, "no data, sleep\n");  in wov_read_audio_shm()
571 		wov_queue_enqueue(priv, priv->wov_audio_shm_p + r.offset, r.len,  in wov_read_audio_shm()
572 			priv->wov_audio_shm_type == EC_CODEC_SHM_TYPE_EC_RAM);  in wov_read_audio_shm()
573 	return -EAGAIN;  in wov_read_audio_shm()
580 	int remain = priv->wov_burst_read ? 16000 : 320;  in wov_read_audio()
585 		ret = send_ec_host_command(priv->ec_device, EC_CMD_EC_CODEC_WOV,  in wov_read_audio()
589 			dev_err(priv->dev,  in wov_read_audio()
595 			dev_dbg(priv->dev, "no data, sleep\n");  in wov_read_audio()
596 			priv->wov_burst_read = false;  in wov_read_audio()
601 		remain -= r.len;  in wov_read_audio()
604 	return -EAGAIN;  in wov_read_audio()
613 	mutex_lock(&priv->wov_dma_lock);  in wov_copy_work()
614 	if (!priv->wov_substream) {  in wov_copy_work()
615 		dev_warn(priv->dev, "no pcm substream\n");  in wov_copy_work()
624 	if (ret == -EAGAIN)  in wov_copy_work()
625 		schedule_delayed_work(&priv->wov_copy_work,  in wov_copy_work()
628 		dev_err(priv->dev, "failed to read audio data\n");  in wov_copy_work()
630 	mutex_unlock(&priv->wov_dma_lock);  in wov_copy_work()
639 	ucontrol->value.integer.value[0] = priv->wov_enabled;  in wov_enable_get()
648 	int enabled = ucontrol->value.integer.value[0];  in wov_enable_put()
652 	if (priv->wov_enabled != enabled) {  in wov_enable_put()
658 		ret = send_ec_host_command(priv->ec_device, EC_CMD_EC_CODEC_WOV,  in wov_enable_put()
661 			dev_err(priv->dev, "failed to %s wov\n",  in wov_enable_put()
666 		priv->wov_enabled = enabled;  in wov_enable_put()
679 	if (size > priv->wov_lang_shm_len) {  in wov_set_lang_shm()
680 		dev_err(priv->dev, "no enough SHM size: %d\n",  in wov_set_lang_shm()
681 			priv->wov_lang_shm_len);  in wov_set_lang_shm()
682 		return -EIO;  in wov_set_lang_shm()
685 	switch (priv->wov_lang_shm_type) {  in wov_set_lang_shm()
687 		memcpy_toio((void __force __iomem *)priv->wov_lang_shm_p,  in wov_set_lang_shm()
689 		memset_io((void __force __iomem *)priv->wov_lang_shm_p + size,  in wov_set_lang_shm()
690 			  0, priv->wov_lang_shm_len - size);  in wov_set_lang_shm()
693 		memcpy(priv->wov_lang_shm_p, buf, size);  in wov_set_lang_shm()
694 		memset(priv->wov_lang_shm_p + size, 0,  in wov_set_lang_shm()
695 		       priv->wov_lang_shm_len - size);  in wov_set_lang_shm()
703 	memcpy(pp->hash, digest, SHA256_DIGEST_SIZE);  in wov_set_lang_shm()
704 	pp->total_len = size;  in wov_set_lang_shm()
705 	ret = send_ec_host_command(priv->ec_device, EC_CMD_EC_CODEC_WOV,  in wov_set_lang_shm()
708 		dev_err(priv->dev, "failed to EC_CODEC_WOV_SET_LANG_SHM\n");  in wov_set_lang_shm()
724 		req = min(size - i, ARRAY_SIZE(pp->buf));  in wov_set_lang()
727 		memcpy(pp->hash, digest, SHA256_DIGEST_SIZE);  in wov_set_lang()
728 		pp->total_len = size;  in wov_set_lang()
729 		pp->offset = i;  in wov_set_lang()
730 		memcpy(pp->buf, buf + i, req);  in wov_set_lang()
731 		pp->len = req;  in wov_set_lang()
732 		ret = send_ec_host_command(priv->ec_device, EC_CMD_EC_CODEC_WOV,  in wov_set_lang()
735 			dev_err(priv->dev, "failed to EC_CODEC_WOV_SET_LANG\n");  in wov_set_lang()
758 	size -= 8;  in wov_hotword_model_put()
760 	dev_dbg(priv->dev, "%s: size=%d\n", __func__, size);  in wov_hotword_model_put()
767 	dev_dbg(priv->dev, "hash=%*phN\n", SHA256_DIGEST_SIZE, digest);  in wov_hotword_model_put()
770 	ret = send_ec_host_command(priv->ec_device, EC_CMD_EC_CODEC_WOV,  in wov_hotword_model_put()
777 		dev_dbg(priv->dev, "not updated");  in wov_hotword_model_put()
792 	SOC_SINGLE_BOOL_EXT("Wake-on-Voice Switch", 0,
816 	dev_dbg(priv->dev, "%s\n", __func__);  in wov_host_event()
818 	host_event = cros_ec_get_host_event(priv->ec_device);  in wov_host_event()
820 		schedule_delayed_work(&priv->wov_copy_work, 0);  in wov_host_event()
833 	mutex_init(&priv->wov_dma_lock);  in wov_probe()
834 	INIT_DELAYED_WORK(&priv->wov_copy_work, wov_copy_work);  in wov_probe()
836 	priv->wov_notifier.notifier_call = wov_host_event;  in wov_probe()
838 			&priv->ec_device->event_notifier, &priv->wov_notifier);  in wov_probe()
843 		priv->wov_lang_shm_p = wov_map_shm(priv,  in wov_probe()
845 				&priv->wov_lang_shm_len,  in wov_probe()
846 				&priv->wov_lang_shm_type);  in wov_probe()
847 		if (!priv->wov_lang_shm_p)  in wov_probe()
848 			return -EFAULT;  in wov_probe()
852 		priv->wov_audio_shm_p = wov_map_shm(priv,  in wov_probe()
854 				&priv->wov_audio_shm_len,  in wov_probe()
855 				&priv->wov_audio_shm_type);  in wov_probe()
856 		if (!priv->wov_audio_shm_p)  in wov_probe()
857 			return -EFAULT;  in wov_probe()
869 			&priv->ec_device->event_notifier, &priv->wov_notifier);  in wov_remove()
900 	mutex_lock(&priv->wov_dma_lock);  in wov_pcm_hw_params()
901 	priv->wov_substream = substream;  in wov_pcm_hw_params()
902 	priv->wov_rp = priv->wov_wp = 0;  in wov_pcm_hw_params()
903 	priv->wov_dma_offset = 0;  in wov_pcm_hw_params()
904 	priv->wov_burst_read = true;  in wov_pcm_hw_params()
905 	mutex_unlock(&priv->wov_dma_lock);  in wov_pcm_hw_params()
916 	mutex_lock(&priv->wov_dma_lock);  in wov_pcm_hw_free()
918 	priv->wov_substream = NULL;  in wov_pcm_hw_free()
919 	mutex_unlock(&priv->wov_dma_lock);  in wov_pcm_hw_free()
921 	cancel_delayed_work_sync(&priv->wov_copy_work);  in wov_pcm_hw_free()
929 	struct snd_pcm_runtime *runtime = substream->runtime;  in wov_pcm_pointer()
933 	return bytes_to_frames(runtime, priv->wov_dma_offset);  in wov_pcm_pointer()
939 	snd_pcm_set_managed_buffer_all(rtd->pcm, SNDRV_DMA_TYPE_VMALLOC,  in wov_pcm_new()
958 	struct device *dev = &pdev->dev;  in cros_ec_codec_platform_probe()
959 	struct cros_ec_device *ec_device = dev_get_drvdata(pdev->dev.parent);  in cros_ec_codec_platform_probe()
972 		return -ENOMEM;  in cros_ec_codec_platform_probe()
975 	regaddr_p = of_get_address(dev->of_node, 0, &ec_shm_size, NULL);  in cros_ec_codec_platform_probe()
977 		priv->ec_shm_addr = of_read_number(regaddr_p, 2);  in cros_ec_codec_platform_probe()
978 		priv->ec_shm_len = ec_shm_size;  in cros_ec_codec_platform_probe()
981 			priv->ec_shm_addr, priv->ec_shm_len);  in cros_ec_codec_platform_probe()
984 	ret = of_reserved_mem_region_to_resource(dev->of_node, 0, &res);  in cros_ec_codec_platform_probe()
986 		priv->ap_shm_phys_addr = res.start;  in cros_ec_codec_platform_probe()
987 		priv->ap_shm_len = resource_size(&res);  in cros_ec_codec_platform_probe()
988 		priv->ap_shm_addr =  in cros_ec_codec_platform_probe()
990 				dev, priv->ap_shm_phys_addr,  in cros_ec_codec_platform_probe()
991 				priv->ap_shm_len);  in cros_ec_codec_platform_probe()
992 		priv->ap_shm_last_alloc = priv->ap_shm_phys_addr;  in cros_ec_codec_platform_probe()
995 			priv->ap_shm_phys_addr, priv->ap_shm_len);  in cros_ec_codec_platform_probe()
999 	priv->dev = dev;  in cros_ec_codec_platform_probe()
1000 	priv->ec_device = ec_device;  in cros_ec_codec_platform_probe()
1001 	atomic_set(&priv->dmic_probed, 0);  in cros_ec_codec_platform_probe()
1004 	ret = send_ec_host_command(priv->ec_device, EC_CMD_EC_CODEC,  in cros_ec_codec_platform_probe()
1011 	priv->ec_capabilities = r.capabilities;  in cros_ec_codec_platform_probe()
1013 	/* Reset EC codec i2s rx. */  in cros_ec_codec_platform_probe()
1015 	ret = send_ec_host_command(priv->ec_device, EC_CMD_EC_CODEC_I2S_RX,  in cros_ec_codec_platform_probe()
1017 	if (ret == -ENOPROTOOPT) {  in cros_ec_codec_platform_probe()
1019 			 "Missing reset command. Please update EC firmware.\n");  in cros_ec_codec_platform_probe()
1038 	{ .compatible = "google,cros-ec-codec" },
1054 		.name = "cros-ec-codec",
1064 MODULE_DESCRIPTION("ChromeOS EC codec driver");
1065 MODULE_AUTHOR("Cheng-Yi Chiang <cychiang@chromium.org>");
1066 MODULE_ALIAS("platform:cros-ec-codec");