1 // SPDX-License-Identifier: GPL-2.0-only
3  * wm8940.c  --  WM8940 ALSA Soc Audio driver
14  * No means to obtain current gain if alc enabled.
131 	{ 0x20, 0x0038 }, /* ALC Control 1 */
132 	{ 0x21, 0x000B }, /* ALC Control 2 */
133 	{ 0x22, 0x0032 }, /* ALC Control 3 */
140 	{ 0x2a, 0x0030 }, /* ALC Control 4 */
155 static const char *wm8940_companding[] = { "Off", "NC", "u-law", "A-law" };
161 static const char *wm8940_alc_mode_text[] = {"ALC", "Limiter"};
173 static DECLARE_TLV_DB_SCALE(wm8940_spk_vol_tlv, -5700, 100, 1);
174 static DECLARE_TLV_DB_SCALE(wm8940_att_tlv, -1000, 1000, 0);
175 static DECLARE_TLV_DB_SCALE(wm8940_pga_vol_tlv, -1200, 75, 0);
176 static DECLARE_TLV_DB_SCALE(wm8940_alc_min_tlv, -1200, 600, 0);
178 static DECLARE_TLV_DB_SCALE(wm8940_alc_tar_tlv, -2250, 50, 0);
180 static DECLARE_TLV_DB_SCALE(wm8940_lim_thresh_tlv, -600, 100, 0);
181 static DECLARE_TLV_DB_SCALE(wm8940_adc_tlv, -12750, 50, 1);
190 	SOC_ENUM("ALC Mode", wm8940_alc_mode_enum),
191 	SOC_SINGLE("ALC Switch", WM8940_ALC1, 8, 1, 0),
192 	SOC_SINGLE_TLV("ALC Capture Max Gain", WM8940_ALC1,
194 	SOC_SINGLE_TLV("ALC Capture Min Gain", WM8940_ALC1,
196 	SOC_SINGLE_TLV("ALC Capture Target", WM8940_ALC2,
198 	SOC_SINGLE("ALC Capture Hold", WM8940_ALC2, 4, 10, 0),
199 	SOC_SINGLE("ALC Capture Decay", WM8940_ALC3, 4, 10, 0),
200 	SOC_SINGLE("ALC Capture Attach", WM8940_ALC3, 0, 10, 0),
201 	SOC_SINGLE("ALC ZC Switch", WM8940_ALC4, 1, 1, 0),
202 	SOC_SINGLE("ALC Capture Noise Gate Switch", WM8940_NOISEGATE,
204 	SOC_SINGLE("ALC Capture Noise Gate Threshold", WM8940_NOISEGATE,
258 static DECLARE_TLV_DB_SCALE(wm8940_boost_vol_tlv, -1500, 300, 1);
341 	struct snd_soc_component *component = codec_dai->component;  in wm8940_set_dai_fmt()
352 		return -EINVAL;  in wm8940_set_dai_fmt()
397 	struct snd_soc_component *component = dai->component;  in wm8940_i2s_hw_params()
405 	priv->fs = params_rate(params);  in wm8940_i2s_hw_params()
411 	if (substream->stream == SNDRV_PCM_STREAM_CAPTURE  in wm8940_i2s_hw_params()
466 	struct snd_soc_component *component = dai->component;  in wm8940_mute()
487 		/* Enable thermal shutdown */  in wm8940_set_bias_level()
502 			ret = regcache_sync(wm8940->regmap);  in wm8940_set_bias_level()
504 				dev_err(component->dev, "Failed to sync cache: %d\n", ret);  in wm8940_set_bias_level()
585 	struct snd_soc_component *component = codec_dai->component;  in wm8940_set_dai_pll()
612 	/* Enable the PLL */  in wm8940_set_dai_pll()
626 	struct snd_soc_component *component = codec_dai->component;  in wm8940_set_dai_clkdiv()
681 	struct snd_soc_component *codec = dai->component;  in wm8940_update_clocks()
688 	if (!priv->mclk || !priv->fs)  in wm8940_update_clocks()
691 	fs256 = 256 * priv->fs;  in wm8940_update_clocks()
693 	f = wm8940_get_mclkdiv(priv->mclk, fs256, &mclkdiv);  in wm8940_update_clocks()
694 	if (f != priv->mclk) {  in wm8940_update_clocks()
699 	wm8940_set_dai_pll(dai, 0, 0, priv->mclk, fpll);  in wm8940_update_clocks()
708 	struct snd_soc_component *codec = dai->component;  in wm8940_set_dai_sysclk()
712 		return -EINVAL;  in wm8940_set_dai_sysclk()
714 	priv->mclk = freq;  in wm8940_set_dai_sysclk()
738 	.name = "wm8940-hifi",
759 	struct wm8940_setup_data *pdata = component->dev->platform_data;  in wm8940_probe()
764 	 * Check chip ID for wm8940 - value of 0x00 offset  in wm8940_probe()
770 		dev_err(component->dev, "Wrong wm8940 chip ID: 0x%x\n", reg);  in wm8940_probe()
771 		return -ENODEV;  in wm8940_probe()
776 		dev_err(component->dev, "Failed to issue reset\n");  in wm8940_probe()
788 		ret = snd_soc_component_write(component, WM8940_OUTPUTCTL, reg | pdata->vroi);  in wm8940_probe()
829 	wm8940 = devm_kzalloc(&i2c->dev, sizeof(struct wm8940_priv),  in wm8940_i2c_probe()
832 		return -ENOMEM;  in wm8940_i2c_probe()
834 	wm8940->regmap = devm_regmap_init_i2c(i2c, &wm8940_regmap);  in wm8940_i2c_probe()
835 	if (IS_ERR(wm8940->regmap))  in wm8940_i2c_probe()
836 		return PTR_ERR(wm8940->regmap);  in wm8940_i2c_probe()
840 	ret = devm_snd_soc_register_component(&i2c->dev,  in wm8940_i2c_probe()