[alsa-devel] [PATCH] ASoC: rt5514: expose Hotword Model control

[Hsin-Yu Chao]

This change exposes mixer control 'Hotword Model' for switching
hotword model in runtime. This new function requires updated
firmware to load hotword model at address 0x4ff80000.

Note that if the rt5514-spi driver is not enabled in kernel, hotword
model will not be loaded when "DSP Voice Wake Up" is set to turn on
DSP mode, and an error is logged instead.

Signed-off-by: Hsin-Yu Chao <hychao at chromium.org>
---
 sound/soc/codecs/rt5514.c | 63 +++++++++++++++++++++++++++++++++++++++++++++++
 sound/soc/codecs/rt5514.h |  3 +++
 2 files changed, 66 insertions(+)

diff --git a/sound/soc/codecs/rt5514.c b/sound/soc/codecs/rt5514.c
index a2722177470e..250581082e9d 100644
--- a/sound/soc/codecs/rt5514.c
+++ b/sound/soc/codecs/rt5514.c
@@ -335,6 +335,39 @@ static int rt5514_dsp_voice_wake_up_put(struct snd_kcontrol *kcontrol,
 				fw = NULL;
 			}
 
+			if (rt5514->model_buf && rt5514->model_len) {
+#if IS_ENABLED(CONFIG_SND_SOC_RT5514_SPI)
+				int ret;
+
+				ret = rt5514_spi_burst_write(0x4ff80000,
+					rt5514->model_buf,
+					((rt5514->model_len / 8) + 1) * 8);
+				if (ret) {
+					dev_err(codec->dev,
+						"Model load failed %d\n", ret);
+					return ret;
+				}
+#else
+				dev_err(codec->dev,
+					"No SPI driver for loading firmware\n");
+#endif
+			} else {
+				request_firmware(&fw, RT5514_FIRMWARE3,
+						 codec->dev);
+				if (fw) {
+#if IS_ENABLED(CONFIG_SND_SOC_RT5514_SPI)
+					rt5514_spi_burst_write(0x4ff80000,
+						fw->data,
+						((fw->size/8)+1)*8);
+#else
+					dev_err(codec->dev,
+						"No SPI driver to load fw\n");
+#endif
+					release_firmware(fw);
+					fw = NULL;
+				}
+			}
+
 			/* DSP run */
 			regmap_write(rt5514->i2c_regmap, 0x18002f00,
 				0x00055148);
@@ -349,6 +382,34 @@ static int rt5514_dsp_voice_wake_up_put(struct snd_kcontrol *kcontrol,
 	return 0;
 }
 
+static int rt5514_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 rt5514_priv *rt5514 = snd_soc_component_get_drvdata(component);
+	struct snd_soc_codec *codec = rt5514->codec;
+	int ret = 0;
+
+	if (rt5514->model_buf || rt5514->model_len < size) {
+		if (rt5514->model_buf)
+			devm_kfree(codec->dev, rt5514->model_buf);
+		rt5514->model_buf = devm_kmalloc(codec->dev, size, GFP_KERNEL);
+		if (!rt5514->model_buf) {
+			ret = -ENOMEM;
+			goto done;
+		}
+	}
+
+	/* Skips the TLV header. */
+	bytes += 2;
+
+	if (copy_from_user(rt5514->model_buf, bytes, size))
+		ret = -EFAULT;
+done:
+	rt5514->model_len = (ret ? 0 : size);
+	return ret;
+}
+
 static const struct snd_kcontrol_new rt5514_snd_controls[] = {
 	SOC_DOUBLE_TLV("MIC Boost Volume", RT5514_ANA_CTRL_MICBST,
 		RT5514_SEL_BSTL_SFT, RT5514_SEL_BSTR_SFT, 8, 0, bst_tlv),
@@ -360,6 +421,8 @@ static const struct snd_kcontrol_new rt5514_snd_controls[] = {
 		adc_vol_tlv),
 	SOC_SINGLE_EXT("DSP Voice Wake Up", SND_SOC_NOPM, 0, 1, 0,
 		rt5514_dsp_voice_wake_up_get, rt5514_dsp_voice_wake_up_put),
+	SND_SOC_BYTES_TLV("Hotword Model", 0x8504,
+		NULL, rt5514_hotword_model_put),
 };
 
 /* ADC Mixer*/
diff --git a/sound/soc/codecs/rt5514.h b/sound/soc/codecs/rt5514.h
index 02bc212a86d9..07475a9918d2 100644
--- a/sound/soc/codecs/rt5514.h
+++ b/sound/soc/codecs/rt5514.h
@@ -236,6 +236,7 @@
 
 #define RT5514_FIRMWARE1	"rt5514_dsp_fw1.bin"
 #define RT5514_FIRMWARE2	"rt5514_dsp_fw2.bin"
+#define RT5514_FIRMWARE3	"rt5514_dsp_fw3.bin"
 
 /* System Clock Source */
 enum {
@@ -262,6 +263,8 @@ struct rt5514_priv {
 	int pll_in;
 	int pll_out;
 	int dsp_enabled;
+	u8 *model_buf;
+	unsigned int model_len;
 };
 
 #endif /* __RT5514_H__ */
-- 
2.12.2