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(c: 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(c: component); |
67 | |
68 | return regmap_update_bits(map: priv->regmap, PCM1789_SOFT_MUTE, |
69 | PCM1789_MUTE_MASK, |
70 | val: 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(c: component); |
79 | int val = 0, ret; |
80 | |
81 | priv->rate = params_rate(p: params); |
82 | |
83 | switch (priv->format & SND_SOC_DAIFMT_FORMAT_MASK) { |
84 | case SND_SOC_DAIFMT_RIGHT_J: |
85 | switch (params_width(p: 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(p: 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(p: 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(map: 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(map: priv->regmap, PCM1789_MUTE_CONTROL, |
139 | mask: 0x3 << PCM1789_MUTE_SRET, val: 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(c: 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(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, size: 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, data: pcm1789); |
246 | |
247 | pcm1789->reset = devm_gpiod_get_optional(dev, con_id: "reset" , flags: GPIOD_OUT_HIGH); |
248 | if (IS_ERR(ptr: pcm1789->reset)) |
249 | return PTR_ERR(ptr: pcm1789->reset); |
250 | |
251 | gpiod_set_value_cansleep(desc: pcm1789->reset, value: 0); |
252 | msleep(msecs: 300); |
253 | |
254 | INIT_WORK(&pcm1789->work, pcm1789_work_queue); |
255 | |
256 | return devm_snd_soc_register_component(dev, component_driver: &soc_component_dev_pcm1789, |
257 | dai_drv: &pcm1789_dai, num_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(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" ); |
272 | |