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
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
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
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
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