xref: /linux/sound/soc/meson/t9015.c (revision 79790b6818e96c58fe2bffee1b418c16e64e7b80)
1 // SPDX-License-Identifier: GPL-2.0
2 //
3 // Copyright (c) 2020 BayLibre, SAS.
4 // Author: Jerome Brunet <jbrunet@baylibre.com>
5 
6 #include <linux/clk.h>
7 #include <linux/delay.h>
8 #include <linux/module.h>
9 #include <linux/regmap.h>
10 #include <linux/regulator/consumer.h>
11 #include <linux/reset.h>
12 #include <sound/soc.h>
13 #include <sound/tlv.h>
14 
15 #define BLOCK_EN	0x00
16 #define  LORN_EN	0
17 #define  LORP_EN	1
18 #define  LOLN_EN	2
19 #define  LOLP_EN	3
20 #define  DACR_EN	4
21 #define  DACL_EN	5
22 #define  DACR_INV	20
23 #define  DACL_INV	21
24 #define  DACR_SRC	22
25 #define  DACL_SRC	23
26 #define  REFP_BUF_EN	BIT(12)
27 #define  BIAS_CURRENT_EN BIT(13)
28 #define  VMID_GEN_FAST	BIT(14)
29 #define  VMID_GEN_EN	BIT(15)
30 #define  I2S_MODE	BIT(30)
31 #define VOL_CTRL0	0x04
32 #define  GAIN_H		31
33 #define  GAIN_L		23
34 #define VOL_CTRL1	0x08
35 #define  DAC_MONO	8
36 #define  RAMP_RATE	10
37 #define  VC_RAMP_MODE	12
38 #define  MUTE_MODE	13
39 #define  UNMUTE_MODE	14
40 #define  DAC_SOFT_MUTE	15
41 #define  DACR_VC	16
42 #define  DACL_VC	24
43 #define LINEOUT_CFG	0x0c
44 #define  LORN_POL	0
45 #define  LORP_POL	4
46 #define  LOLN_POL	8
47 #define  LOLP_POL	12
48 #define POWER_CFG	0x10
49 
50 struct t9015 {
51 	struct regulator *avdd;
52 };
53 
t9015_dai_set_fmt(struct snd_soc_dai * dai,unsigned int fmt)54 static int t9015_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
55 {
56 	struct snd_soc_component *component = dai->component;
57 	unsigned int val;
58 
59 	switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
60 	case SND_SOC_DAIFMT_CBM_CFM:
61 		val = I2S_MODE;
62 		break;
63 
64 	case SND_SOC_DAIFMT_CBS_CFS:
65 		val = 0;
66 		break;
67 
68 	default:
69 		return -EINVAL;
70 	}
71 
72 	snd_soc_component_update_bits(component, BLOCK_EN, I2S_MODE, val);
73 
74 	if (((fmt & SND_SOC_DAIFMT_FORMAT_MASK) != SND_SOC_DAIFMT_I2S) &&
75 	    ((fmt & SND_SOC_DAIFMT_FORMAT_MASK) != SND_SOC_DAIFMT_LEFT_J))
76 		return -EINVAL;
77 
78 	return 0;
79 }
80 
81 static const struct snd_soc_dai_ops t9015_dai_ops = {
82 	.set_fmt = t9015_dai_set_fmt,
83 };
84 
85 static struct snd_soc_dai_driver t9015_dai = {
86 	.name = "t9015-hifi",
87 	.playback = {
88 		.stream_name = "Playback",
89 		.channels_min = 1,
90 		.channels_max = 2,
91 		.rates = SNDRV_PCM_RATE_8000_96000,
92 		.formats = (SNDRV_PCM_FMTBIT_S8 |
93 			    SNDRV_PCM_FMTBIT_S16_LE |
94 			    SNDRV_PCM_FMTBIT_S20_LE |
95 			    SNDRV_PCM_FMTBIT_S24_LE),
96 	},
97 	.ops = &t9015_dai_ops,
98 };
99 
100 static const DECLARE_TLV_DB_MINMAX_MUTE(dac_vol_tlv, -9525, 0);
101 
102 static const char * const ramp_rate_txt[] = { "Fast", "Slow" };
103 static SOC_ENUM_SINGLE_DECL(ramp_rate_enum, VOL_CTRL1, RAMP_RATE,
104 			    ramp_rate_txt);
105 
106 static const char * const dacr_in_txt[] = { "Right", "Left" };
107 static SOC_ENUM_SINGLE_DECL(dacr_in_enum, BLOCK_EN, DACR_SRC, dacr_in_txt);
108 
109 static const char * const dacl_in_txt[] = { "Left", "Right" };
110 static SOC_ENUM_SINGLE_DECL(dacl_in_enum, BLOCK_EN, DACL_SRC, dacl_in_txt);
111 
112 static const char * const mono_txt[] = { "Stereo", "Mono"};
113 static SOC_ENUM_SINGLE_DECL(mono_enum, VOL_CTRL1, DAC_MONO, mono_txt);
114 
115 static const struct snd_kcontrol_new t9015_snd_controls[] = {
116 	/* Volume Controls */
117 	SOC_ENUM("Playback Channel Mode", mono_enum),
118 	SOC_SINGLE("Playback Switch", VOL_CTRL1, DAC_SOFT_MUTE, 1, 1),
119 	SOC_DOUBLE_TLV("Playback Volume", VOL_CTRL1, DACL_VC, DACR_VC,
120 		       0xff, 0, dac_vol_tlv),
121 
122 	/* Ramp Controls */
123 	SOC_ENUM("Ramp Rate", ramp_rate_enum),
124 	SOC_SINGLE("Volume Ramp Switch", VOL_CTRL1, VC_RAMP_MODE, 1, 0),
125 	SOC_SINGLE("Mute Ramp Switch", VOL_CTRL1, MUTE_MODE, 1, 0),
126 	SOC_SINGLE("Unmute Ramp Switch", VOL_CTRL1, UNMUTE_MODE, 1, 0),
127 };
128 
129 static const struct snd_kcontrol_new t9015_right_dac_mux =
130 	SOC_DAPM_ENUM("Right DAC Source", dacr_in_enum);
131 static const struct snd_kcontrol_new t9015_left_dac_mux =
132 	SOC_DAPM_ENUM("Left DAC Source", dacl_in_enum);
133 
134 static const struct snd_soc_dapm_widget t9015_dapm_widgets[] = {
135 	SND_SOC_DAPM_AIF_IN("Right IN", NULL, 0, SND_SOC_NOPM, 0, 0),
136 	SND_SOC_DAPM_AIF_IN("Left IN", NULL, 0, SND_SOC_NOPM, 0, 0),
137 	SND_SOC_DAPM_MUX("Right DAC Sel", SND_SOC_NOPM, 0, 0,
138 			 &t9015_right_dac_mux),
139 	SND_SOC_DAPM_MUX("Left DAC Sel", SND_SOC_NOPM, 0, 0,
140 			 &t9015_left_dac_mux),
141 	SND_SOC_DAPM_DAC("Right DAC", NULL, BLOCK_EN, DACR_EN, 0),
142 	SND_SOC_DAPM_DAC("Left DAC",  NULL, BLOCK_EN, DACL_EN, 0),
143 	SND_SOC_DAPM_OUT_DRV("Right- Driver", BLOCK_EN, LORN_EN, 0,
144 			 NULL, 0),
145 	SND_SOC_DAPM_OUT_DRV("Right+ Driver", BLOCK_EN, LORP_EN, 0,
146 			 NULL, 0),
147 	SND_SOC_DAPM_OUT_DRV("Left- Driver",  BLOCK_EN, LOLN_EN, 0,
148 			 NULL, 0),
149 	SND_SOC_DAPM_OUT_DRV("Left+ Driver",  BLOCK_EN, LOLP_EN, 0,
150 			 NULL, 0),
151 	SND_SOC_DAPM_OUTPUT("LORN"),
152 	SND_SOC_DAPM_OUTPUT("LORP"),
153 	SND_SOC_DAPM_OUTPUT("LOLN"),
154 	SND_SOC_DAPM_OUTPUT("LOLP"),
155 };
156 
157 static const struct snd_soc_dapm_route t9015_dapm_routes[] = {
158 	{ "Right IN", NULL, "Playback" },
159 	{ "Left IN",  NULL, "Playback" },
160 	{ "Right DAC Sel", "Right", "Right IN" },
161 	{ "Right DAC Sel", "Left",  "Left IN" },
162 	{ "Left DAC Sel",  "Right", "Right IN" },
163 	{ "Left DAC Sel",  "Left",  "Left IN" },
164 	{ "Right DAC", NULL, "Right DAC Sel" },
165 	{ "Left DAC",  NULL, "Left DAC Sel" },
166 	{ "Right- Driver", NULL, "Right DAC" },
167 	{ "Right+ Driver", NULL, "Right DAC" },
168 	{ "Left- Driver",  NULL, "Left DAC"  },
169 	{ "Left+ Driver",  NULL, "Left DAC"  },
170 	{ "LORN", NULL, "Right- Driver", },
171 	{ "LORP", NULL, "Right+ Driver", },
172 	{ "LOLN", NULL, "Left- Driver",  },
173 	{ "LOLP", NULL, "Left+ Driver",  },
174 };
175 
t9015_set_bias_level(struct snd_soc_component * component,enum snd_soc_bias_level level)176 static int t9015_set_bias_level(struct snd_soc_component *component,
177 				enum snd_soc_bias_level level)
178 {
179 	struct t9015 *priv = snd_soc_component_get_drvdata(component);
180 	enum snd_soc_bias_level now =
181 		snd_soc_component_get_bias_level(component);
182 	int ret;
183 
184 	switch (level) {
185 	case SND_SOC_BIAS_ON:
186 		snd_soc_component_update_bits(component, BLOCK_EN,
187 					      BIAS_CURRENT_EN,
188 					      BIAS_CURRENT_EN);
189 		break;
190 	case SND_SOC_BIAS_PREPARE:
191 		snd_soc_component_update_bits(component, BLOCK_EN,
192 					      BIAS_CURRENT_EN,
193 					      0);
194 		break;
195 	case SND_SOC_BIAS_STANDBY:
196 		ret = regulator_enable(priv->avdd);
197 		if (ret) {
198 			dev_err(component->dev, "AVDD enable failed\n");
199 			return ret;
200 		}
201 
202 		if (now == SND_SOC_BIAS_OFF) {
203 			snd_soc_component_update_bits(component, BLOCK_EN,
204 				VMID_GEN_EN | VMID_GEN_FAST | REFP_BUF_EN,
205 				VMID_GEN_EN | VMID_GEN_FAST | REFP_BUF_EN);
206 
207 			mdelay(200);
208 			snd_soc_component_update_bits(component, BLOCK_EN,
209 						      VMID_GEN_FAST,
210 						      0);
211 		}
212 
213 		break;
214 	case SND_SOC_BIAS_OFF:
215 		snd_soc_component_update_bits(component, BLOCK_EN,
216 			VMID_GEN_EN | VMID_GEN_FAST | REFP_BUF_EN,
217 			0);
218 
219 		regulator_disable(priv->avdd);
220 		break;
221 	}
222 
223 	return 0;
224 }
225 
226 static const struct snd_soc_component_driver t9015_codec_driver = {
227 	.set_bias_level		= t9015_set_bias_level,
228 	.controls		= t9015_snd_controls,
229 	.num_controls		= ARRAY_SIZE(t9015_snd_controls),
230 	.dapm_widgets		= t9015_dapm_widgets,
231 	.num_dapm_widgets	= ARRAY_SIZE(t9015_dapm_widgets),
232 	.dapm_routes		= t9015_dapm_routes,
233 	.num_dapm_routes	= ARRAY_SIZE(t9015_dapm_routes),
234 	.suspend_bias_off	= 1,
235 	.endianness		= 1,
236 };
237 
238 static const struct regmap_config t9015_regmap_config = {
239 	.reg_bits		= 32,
240 	.reg_stride		= 4,
241 	.val_bits		= 32,
242 	.max_register		= POWER_CFG,
243 };
244 
t9015_probe(struct platform_device * pdev)245 static int t9015_probe(struct platform_device *pdev)
246 {
247 	struct device *dev = &pdev->dev;
248 	struct t9015 *priv;
249 	void __iomem *regs;
250 	struct regmap *regmap;
251 	struct clk *pclk;
252 	int ret;
253 
254 	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
255 	if (!priv)
256 		return -ENOMEM;
257 	platform_set_drvdata(pdev, priv);
258 
259 	pclk = devm_clk_get_enabled(dev, "pclk");
260 	if (IS_ERR(pclk))
261 		return dev_err_probe(dev, PTR_ERR(pclk), "failed to get core clock\n");
262 
263 	priv->avdd = devm_regulator_get(dev, "AVDD");
264 	if (IS_ERR(priv->avdd))
265 		return dev_err_probe(dev, PTR_ERR(priv->avdd), "failed to AVDD\n");
266 
267 	ret = device_reset(dev);
268 	if (ret) {
269 		dev_err(dev, "reset failed\n");
270 		return ret;
271 	}
272 
273 	regs = devm_platform_ioremap_resource(pdev, 0);
274 	if (IS_ERR(regs)) {
275 		dev_err(dev, "register map failed\n");
276 		return PTR_ERR(regs);
277 	}
278 
279 	regmap = devm_regmap_init_mmio(dev, regs, &t9015_regmap_config);
280 	if (IS_ERR(regmap)) {
281 		dev_err(dev, "regmap init failed\n");
282 		return PTR_ERR(regmap);
283 	}
284 
285 	/*
286 	 * Initialize output polarity:
287 	 * ATM the output polarity is fixed but in the future it might useful
288 	 * to add DT property to set this depending on the platform needs
289 	 */
290 	regmap_write(regmap, LINEOUT_CFG, 0x1111);
291 
292 	return devm_snd_soc_register_component(dev, &t9015_codec_driver,
293 					       &t9015_dai, 1);
294 }
295 
296 static const struct of_device_id t9015_ids[] __maybe_unused = {
297 	{ .compatible = "amlogic,t9015", },
298 	{ }
299 };
300 MODULE_DEVICE_TABLE(of, t9015_ids);
301 
302 static struct platform_driver t9015_driver = {
303 	.driver = {
304 		.name = "t9015-codec",
305 		.of_match_table = of_match_ptr(t9015_ids),
306 	},
307 	.probe = t9015_probe,
308 };
309 
310 module_platform_driver(t9015_driver);
311 
312 MODULE_DESCRIPTION("ASoC Amlogic T9015 codec driver");
313 MODULE_AUTHOR("Jerome Brunet <jbrunet@baylibre.com>");
314 MODULE_LICENSE("GPL");
315