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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 | ||
3217004a | 6 | #include <linux/gpio/consumer.h> |
4ae340d1 MJ |
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_digital_mute(struct snd_soc_dai *codec_dai, int mute) | |
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 | .digital_mute = pcm1789_digital_mute, | |
171 | .trigger = pcm1789_trigger, | |
172 | }; | |
173 | ||
174 | static const DECLARE_TLV_DB_SCALE(pcm1789_dac_tlv, -12000, 50, 1); | |
175 | ||
176 | static const struct snd_kcontrol_new pcm1789_controls[] = { | |
177 | SOC_DOUBLE_R_RANGE_TLV("DAC Playback Volume", PCM1789_DAC_VOL_LEFT, | |
178 | PCM1789_DAC_VOL_RIGHT, 0, 0xf, 0xff, 0, | |
179 | pcm1789_dac_tlv), | |
180 | }; | |
181 | ||
182 | static const struct snd_soc_dapm_widget pcm1789_dapm_widgets[] = { | |
183 | SND_SOC_DAPM_OUTPUT("IOUTL+"), | |
184 | SND_SOC_DAPM_OUTPUT("IOUTL-"), | |
185 | SND_SOC_DAPM_OUTPUT("IOUTR+"), | |
186 | SND_SOC_DAPM_OUTPUT("IOUTR-"), | |
187 | }; | |
188 | ||
189 | static const struct snd_soc_dapm_route pcm1789_dapm_routes[] = { | |
190 | { "IOUTL+", NULL, "Playback" }, | |
191 | { "IOUTL-", NULL, "Playback" }, | |
192 | { "IOUTR+", NULL, "Playback" }, | |
193 | { "IOUTR-", NULL, "Playback" }, | |
194 | }; | |
195 | ||
196 | static struct snd_soc_dai_driver pcm1789_dai = { | |
197 | .name = "pcm1789-hifi", | |
198 | .playback = { | |
199 | .stream_name = "Playback", | |
200 | .channels_min = 2, | |
201 | .channels_max = 2, | |
202 | .rates = SNDRV_PCM_RATE_CONTINUOUS, | |
203 | .rate_min = 10000, | |
204 | .rate_max = 200000, | |
205 | .formats = PCM1789_FORMATS, | |
206 | }, | |
207 | .ops = &pcm1789_dai_ops, | |
208 | }; | |
209 | ||
210 | const struct regmap_config pcm1789_regmap_config = { | |
211 | .reg_bits = 8, | |
212 | .val_bits = 8, | |
213 | .max_register = PCM1789_DAC_VOL_RIGHT, | |
214 | .reg_defaults = pcm1789_reg_defaults, | |
215 | .num_reg_defaults = ARRAY_SIZE(pcm1789_reg_defaults), | |
216 | .writeable_reg = pcm1789_writeable_reg, | |
217 | .readable_reg = pcm1789_accessible_reg, | |
218 | }; | |
219 | EXPORT_SYMBOL_GPL(pcm1789_regmap_config); | |
220 | ||
221 | static const struct snd_soc_component_driver soc_component_dev_pcm1789 = { | |
222 | .controls = pcm1789_controls, | |
223 | .num_controls = ARRAY_SIZE(pcm1789_controls), | |
224 | .dapm_widgets = pcm1789_dapm_widgets, | |
225 | .num_dapm_widgets = ARRAY_SIZE(pcm1789_dapm_widgets), | |
226 | .dapm_routes = pcm1789_dapm_routes, | |
227 | .num_dapm_routes = ARRAY_SIZE(pcm1789_dapm_routes), | |
228 | .idle_bias_on = 1, | |
229 | .use_pmdown_time = 1, | |
230 | .endianness = 1, | |
231 | .non_legacy_dai_naming = 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 | int pcm1789_common_exit(struct device *dev) | |
262 | { | |
263 | struct pcm1789_private *priv = dev_get_drvdata(dev); | |
264 | ||
a7dc662c | 265 | flush_work(&priv->work); |
4ae340d1 MJ |
266 | |
267 | return 0; | |
268 | } | |
269 | EXPORT_SYMBOL_GPL(pcm1789_common_exit); | |
270 | ||
271 | MODULE_DESCRIPTION("ASoC PCM1789 driver"); | |
272 | MODULE_AUTHOR("Mylène Josserand <mylene.josserand@free-electrons.com>"); | |
273 | MODULE_LICENSE("GPL"); |