ASoC: mediatek: mt8186: Correct I2S shared clocks
[platform/kernel/linux-starfive.git] / sound / soc / codecs / pcm1789.c
1 // SPDX-License-Identifier: GPL-2.0
2 // Audio driver for PCM1789
3 // Copyright (C) 2018 Bootlin
4 // Mylène Josserand <mylene.josserand@bootlin.com>
5
6 #include <linux/gpio/consumer.h>
7 #include <linux/module.h>
8 #include <linux/workqueue.h>
9
10 #include <sound/pcm_params.h>
11 #include <sound/soc.h>
12 #include <sound/tlv.h>
13
14 #include "pcm1789.h"
15
16 #define PCM1789_MUTE_CONTROL    0x10
17 #define PCM1789_FMT_CONTROL     0x11
18 #define PCM1789_SOFT_MUTE       0x14
19 #define PCM1789_DAC_VOL_LEFT    0x18
20 #define PCM1789_DAC_VOL_RIGHT   0x19
21
22 #define PCM1789_FMT_MASK        0x07
23 #define PCM1789_MUTE_MASK       0x03
24 #define PCM1789_MUTE_SRET       0x06
25
26 struct pcm1789_private {
27         struct regmap *regmap;
28         unsigned int format;
29         unsigned int rate;
30         struct gpio_desc *reset;
31         struct work_struct work;
32         struct device *dev;
33 };
34
35 static const struct reg_default pcm1789_reg_defaults[] = {
36         { PCM1789_FMT_CONTROL, 0x00 },
37         { PCM1789_SOFT_MUTE, 0x00 },
38         { PCM1789_DAC_VOL_LEFT, 0xff },
39         { PCM1789_DAC_VOL_RIGHT, 0xff },
40 };
41
42 static bool pcm1789_accessible_reg(struct device *dev, unsigned int reg)
43 {
44         return reg >= PCM1789_MUTE_CONTROL && reg <= PCM1789_DAC_VOL_RIGHT;
45 }
46
47 static bool pcm1789_writeable_reg(struct device *dev, unsigned int reg)
48 {
49         return pcm1789_accessible_reg(dev, reg);
50 }
51
52 static int pcm1789_set_dai_fmt(struct snd_soc_dai *codec_dai,
53                                unsigned int format)
54 {
55         struct snd_soc_component *component = codec_dai->component;
56         struct pcm1789_private *priv = snd_soc_component_get_drvdata(component);
57
58         priv->format = format;
59
60         return 0;
61 }
62
63 static int pcm1789_mute(struct snd_soc_dai *codec_dai, int mute, int direction)
64 {
65         struct snd_soc_component *component = codec_dai->component;
66         struct pcm1789_private *priv = snd_soc_component_get_drvdata(component);
67
68         return regmap_update_bits(priv->regmap, PCM1789_SOFT_MUTE,
69                                   PCM1789_MUTE_MASK,
70                                   mute ? 0 : PCM1789_MUTE_MASK);
71 }
72
73 static int pcm1789_hw_params(struct snd_pcm_substream *substream,
74                              struct snd_pcm_hw_params *params,
75                              struct snd_soc_dai *codec_dai)
76 {
77         struct snd_soc_component *component = codec_dai->component;
78         struct pcm1789_private *priv = snd_soc_component_get_drvdata(component);
79         int val = 0, ret;
80
81         priv->rate = params_rate(params);
82
83         switch (priv->format & SND_SOC_DAIFMT_FORMAT_MASK) {
84         case SND_SOC_DAIFMT_RIGHT_J:
85                 switch (params_width(params)) {
86                 case 24:
87                         val = 2;
88                         break;
89                 case 16:
90                         val = 3;
91                         break;
92                 default:
93                         return -EINVAL;
94                 }
95                 break;
96         case SND_SOC_DAIFMT_I2S:
97                 switch (params_width(params)) {
98                 case 16:
99                 case 24:
100                 case 32:
101                         val = 0;
102                         break;
103                 default:
104                         return -EINVAL;
105                 }
106                 break;
107         case SND_SOC_DAIFMT_LEFT_J:
108                 switch (params_width(params)) {
109                 case 16:
110                 case 24:
111                 case 32:
112                         val = 1;
113                         break;
114                 default:
115                         return -EINVAL;
116                 }
117                 break;
118         default:
119                 dev_err(component->dev, "Invalid DAI format\n");
120                 return -EINVAL;
121         }
122
123         ret = regmap_update_bits(priv->regmap, PCM1789_FMT_CONTROL,
124                                  PCM1789_FMT_MASK, val);
125         if (ret < 0)
126                 return ret;
127
128         return 0;
129 }
130
131 static void pcm1789_work_queue(struct work_struct *work)
132 {
133         struct pcm1789_private *priv = container_of(work,
134                                                     struct pcm1789_private,
135                                                     work);
136
137         /* Perform a software reset to remove codec from desynchronized state */
138         if (regmap_update_bits(priv->regmap, PCM1789_MUTE_CONTROL,
139                                0x3 << PCM1789_MUTE_SRET, 0) < 0)
140                 dev_err(priv->dev, "Error while setting SRET");
141 }
142
143 static int pcm1789_trigger(struct snd_pcm_substream *substream, int cmd,
144                            struct snd_soc_dai *dai)
145 {
146         struct snd_soc_component *component = dai->component;
147         struct pcm1789_private *priv = snd_soc_component_get_drvdata(component);
148         int ret = 0;
149
150         switch (cmd) {
151         case SNDRV_PCM_TRIGGER_START:
152         case SNDRV_PCM_TRIGGER_RESUME:
153         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
154                 schedule_work(&priv->work);
155                 break;
156         case SNDRV_PCM_TRIGGER_STOP:
157         case SNDRV_PCM_TRIGGER_SUSPEND:
158         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
159                 break;
160         default:
161                 ret = -EINVAL;
162         }
163
164         return ret;
165 }
166
167 static const struct snd_soc_dai_ops pcm1789_dai_ops = {
168         .set_fmt        = pcm1789_set_dai_fmt,
169         .hw_params      = pcm1789_hw_params,
170         .mute_stream    = pcm1789_mute,
171         .trigger        = pcm1789_trigger,
172         .no_capture_mute = 1,
173 };
174
175 static const DECLARE_TLV_DB_SCALE(pcm1789_dac_tlv, -12000, 50, 1);
176
177 static const struct snd_kcontrol_new pcm1789_controls[] = {
178         SOC_DOUBLE_R_RANGE_TLV("DAC Playback Volume", PCM1789_DAC_VOL_LEFT,
179                                PCM1789_DAC_VOL_RIGHT, 0, 0xf, 0xff, 0,
180                                pcm1789_dac_tlv),
181 };
182
183 static const struct snd_soc_dapm_widget pcm1789_dapm_widgets[] = {
184         SND_SOC_DAPM_OUTPUT("IOUTL+"),
185         SND_SOC_DAPM_OUTPUT("IOUTL-"),
186         SND_SOC_DAPM_OUTPUT("IOUTR+"),
187         SND_SOC_DAPM_OUTPUT("IOUTR-"),
188 };
189
190 static const struct snd_soc_dapm_route pcm1789_dapm_routes[] = {
191         { "IOUTL+", NULL, "Playback" },
192         { "IOUTL-", NULL, "Playback" },
193         { "IOUTR+", NULL, "Playback" },
194         { "IOUTR-", NULL, "Playback" },
195 };
196
197 static struct snd_soc_dai_driver pcm1789_dai = {
198         .name = "pcm1789-hifi",
199         .playback = {
200                 .stream_name = "Playback",
201                 .channels_min = 2,
202                 .channels_max = 2,
203                 .rates = SNDRV_PCM_RATE_CONTINUOUS,
204                 .rate_min = 10000,
205                 .rate_max = 200000,
206                 .formats = PCM1789_FORMATS,
207         },
208         .ops = &pcm1789_dai_ops,
209 };
210
211 const struct regmap_config pcm1789_regmap_config = {
212         .reg_bits               = 8,
213         .val_bits               = 8,
214         .max_register           = PCM1789_DAC_VOL_RIGHT,
215         .reg_defaults           = pcm1789_reg_defaults,
216         .num_reg_defaults       = ARRAY_SIZE(pcm1789_reg_defaults),
217         .writeable_reg          = pcm1789_writeable_reg,
218         .readable_reg           = pcm1789_accessible_reg,
219 };
220 EXPORT_SYMBOL_GPL(pcm1789_regmap_config);
221
222 static const struct snd_soc_component_driver soc_component_dev_pcm1789 = {
223         .controls               = pcm1789_controls,
224         .num_controls           = ARRAY_SIZE(pcm1789_controls),
225         .dapm_widgets           = pcm1789_dapm_widgets,
226         .num_dapm_widgets       = ARRAY_SIZE(pcm1789_dapm_widgets),
227         .dapm_routes            = pcm1789_dapm_routes,
228         .num_dapm_routes        = ARRAY_SIZE(pcm1789_dapm_routes),
229         .idle_bias_on           = 1,
230         .use_pmdown_time        = 1,
231         .endianness             = 1,
232 };
233
234 int pcm1789_common_init(struct device *dev, struct regmap *regmap)
235 {
236         struct pcm1789_private *pcm1789;
237
238         pcm1789 = devm_kzalloc(dev, sizeof(struct pcm1789_private),
239                                GFP_KERNEL);
240         if (!pcm1789)
241                 return -ENOMEM;
242
243         pcm1789->regmap = regmap;
244         pcm1789->dev = dev;
245         dev_set_drvdata(dev, pcm1789);
246
247         pcm1789->reset = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_HIGH);
248         if (IS_ERR(pcm1789->reset))
249                 return PTR_ERR(pcm1789->reset);
250
251         gpiod_set_value_cansleep(pcm1789->reset, 0);
252         msleep(300);
253
254         INIT_WORK(&pcm1789->work, pcm1789_work_queue);
255
256         return devm_snd_soc_register_component(dev, &soc_component_dev_pcm1789,
257                                                &pcm1789_dai, 1);
258 }
259 EXPORT_SYMBOL_GPL(pcm1789_common_init);
260
261 void pcm1789_common_exit(struct device *dev)
262 {
263         struct pcm1789_private *priv = dev_get_drvdata(dev);
264
265         flush_work(&priv->work);
266 }
267 EXPORT_SYMBOL_GPL(pcm1789_common_exit);
268
269 MODULE_DESCRIPTION("ASoC PCM1789 driver");
270 MODULE_AUTHOR("Mylène Josserand <mylene.josserand@free-electrons.com>");
271 MODULE_LICENSE("GPL");