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cc289be8 DM |
1 | /* |
2 | * ALSA SoC driver for | |
3 | * Asahi Kasei AK5386 Single-ended 24-Bit 192kHz delta-sigma ADC | |
4 | * | |
5 | * (c) 2013 Daniel Mack <zonque@gmail.com> | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License version 2 as | |
9 | * published by the Free Software Foundation. | |
10 | */ | |
11 | ||
12 | #include <linux/module.h> | |
13 | #include <linux/slab.h> | |
14 | #include <linux/of.h> | |
15 | #include <linux/of_gpio.h> | |
16 | #include <linux/of_device.h> | |
fb668e73 | 17 | #include <linux/regulator/consumer.h> |
cc289be8 DM |
18 | #include <sound/soc.h> |
19 | #include <sound/pcm.h> | |
20 | #include <sound/initval.h> | |
21 | ||
2ad76541 | 22 | static const char * const supply_names[] = { |
fb668e73 DM |
23 | "va", "vd" |
24 | }; | |
25 | ||
cc289be8 DM |
26 | struct ak5386_priv { |
27 | int reset_gpio; | |
fb668e73 | 28 | struct regulator_bulk_data supplies[ARRAY_SIZE(supply_names)]; |
cc289be8 DM |
29 | }; |
30 | ||
dcf1439a MB |
31 | static const struct snd_soc_dapm_widget ak5386_dapm_widgets[] = { |
32 | SND_SOC_DAPM_INPUT("AINL"), | |
33 | SND_SOC_DAPM_INPUT("AINR"), | |
34 | }; | |
35 | ||
36 | static const struct snd_soc_dapm_route ak5386_dapm_routes[] = { | |
37 | { "Capture", NULL, "AINL" }, | |
38 | { "Capture", NULL, "AINR" }, | |
39 | }; | |
40 | ||
12132de6 | 41 | static int ak5386_soc_probe(struct snd_soc_component *component) |
fb668e73 | 42 | { |
12132de6 | 43 | struct ak5386_priv *priv = snd_soc_component_get_drvdata(component); |
fb668e73 DM |
44 | return regulator_bulk_enable(ARRAY_SIZE(priv->supplies), priv->supplies); |
45 | } | |
46 | ||
12132de6 | 47 | static void ak5386_soc_remove(struct snd_soc_component *component) |
fb668e73 | 48 | { |
12132de6 | 49 | struct ak5386_priv *priv = snd_soc_component_get_drvdata(component); |
fb668e73 | 50 | regulator_bulk_disable(ARRAY_SIZE(priv->supplies), priv->supplies); |
fb668e73 DM |
51 | } |
52 | ||
53 | #ifdef CONFIG_PM | |
12132de6 | 54 | static int ak5386_soc_suspend(struct snd_soc_component *component) |
fb668e73 | 55 | { |
12132de6 | 56 | struct ak5386_priv *priv = snd_soc_component_get_drvdata(component); |
fb668e73 DM |
57 | regulator_bulk_disable(ARRAY_SIZE(priv->supplies), priv->supplies); |
58 | return 0; | |
59 | } | |
60 | ||
12132de6 | 61 | static int ak5386_soc_resume(struct snd_soc_component *component) |
fb668e73 | 62 | { |
12132de6 | 63 | struct ak5386_priv *priv = snd_soc_component_get_drvdata(component); |
fb668e73 DM |
64 | return regulator_bulk_enable(ARRAY_SIZE(priv->supplies), priv->supplies); |
65 | } | |
66 | #else | |
67 | #define ak5386_soc_suspend NULL | |
68 | #define ak5386_soc_resume NULL | |
69 | #endif /* CONFIG_PM */ | |
70 | ||
12132de6 KM |
71 | static const struct snd_soc_component_driver soc_component_ak5386 = { |
72 | .probe = ak5386_soc_probe, | |
73 | .remove = ak5386_soc_remove, | |
74 | .suspend = ak5386_soc_suspend, | |
75 | .resume = ak5386_soc_resume, | |
76 | .dapm_widgets = ak5386_dapm_widgets, | |
77 | .num_dapm_widgets = ARRAY_SIZE(ak5386_dapm_widgets), | |
78 | .dapm_routes = ak5386_dapm_routes, | |
79 | .num_dapm_routes = ARRAY_SIZE(ak5386_dapm_routes), | |
80 | .idle_bias_on = 1, | |
81 | .use_pmdown_time = 1, | |
82 | .endianness = 1, | |
83 | .non_legacy_dai_naming = 1, | |
dcf1439a | 84 | }; |
cc289be8 DM |
85 | |
86 | static int ak5386_set_dai_fmt(struct snd_soc_dai *codec_dai, | |
87 | unsigned int format) | |
88 | { | |
12132de6 | 89 | struct snd_soc_component *component = codec_dai->component; |
cc289be8 DM |
90 | |
91 | format &= SND_SOC_DAIFMT_FORMAT_MASK; | |
92 | if (format != SND_SOC_DAIFMT_LEFT_J && | |
93 | format != SND_SOC_DAIFMT_I2S) { | |
12132de6 | 94 | dev_err(component->dev, "Invalid DAI format\n"); |
cc289be8 DM |
95 | return -EINVAL; |
96 | } | |
97 | ||
98 | return 0; | |
99 | } | |
100 | ||
101 | static int ak5386_hw_params(struct snd_pcm_substream *substream, | |
102 | struct snd_pcm_hw_params *params, | |
103 | struct snd_soc_dai *dai) | |
104 | { | |
12132de6 KM |
105 | struct snd_soc_component *component = dai->component; |
106 | struct ak5386_priv *priv = snd_soc_component_get_drvdata(component); | |
cc289be8 DM |
107 | |
108 | /* | |
109 | * From the datasheet: | |
110 | * | |
111 | * All external clocks (MCLK, SCLK and LRCK) must be present unless | |
112 | * PDN pin = āLā. If these clocks are not provided, the AK5386 may | |
113 | * draw excess current due to its use of internal dynamically | |
114 | * refreshed logic. If the external clocks are not present, place | |
115 | * the AK5386 in power-down mode (PDN pin = āLā). | |
116 | */ | |
117 | ||
118 | if (gpio_is_valid(priv->reset_gpio)) | |
119 | gpio_set_value(priv->reset_gpio, 1); | |
120 | ||
121 | return 0; | |
122 | } | |
123 | ||
124 | static int ak5386_hw_free(struct snd_pcm_substream *substream, | |
125 | struct snd_soc_dai *dai) | |
126 | { | |
12132de6 KM |
127 | struct snd_soc_component *component = dai->component; |
128 | struct ak5386_priv *priv = snd_soc_component_get_drvdata(component); | |
cc289be8 DM |
129 | |
130 | if (gpio_is_valid(priv->reset_gpio)) | |
131 | gpio_set_value(priv->reset_gpio, 0); | |
132 | ||
133 | return 0; | |
134 | } | |
135 | ||
136 | static const struct snd_soc_dai_ops ak5386_dai_ops = { | |
137 | .set_fmt = ak5386_set_dai_fmt, | |
138 | .hw_params = ak5386_hw_params, | |
139 | .hw_free = ak5386_hw_free, | |
140 | }; | |
141 | ||
142 | static struct snd_soc_dai_driver ak5386_dai = { | |
143 | .name = "ak5386-hifi", | |
144 | .capture = { | |
145 | .stream_name = "Capture", | |
146 | .channels_min = 1, | |
147 | .channels_max = 2, | |
148 | .rates = SNDRV_PCM_RATE_8000_192000, | |
149 | .formats = SNDRV_PCM_FMTBIT_S8 | | |
150 | SNDRV_PCM_FMTBIT_S16_LE | | |
151 | SNDRV_PCM_FMTBIT_S24_LE | | |
152 | SNDRV_PCM_FMTBIT_S24_3LE, | |
153 | }, | |
154 | .ops = &ak5386_dai_ops, | |
155 | }; | |
156 | ||
157 | #ifdef CONFIG_OF | |
158 | static const struct of_device_id ak5386_dt_ids[] = { | |
159 | { .compatible = "asahi-kasei,ak5386", }, | |
160 | { } | |
161 | }; | |
162 | MODULE_DEVICE_TABLE(of, ak5386_dt_ids); | |
163 | #endif | |
164 | ||
165 | static int ak5386_probe(struct platform_device *pdev) | |
166 | { | |
167 | struct device *dev = &pdev->dev; | |
168 | struct ak5386_priv *priv; | |
fb668e73 | 169 | int ret, i; |
cc289be8 DM |
170 | |
171 | priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); | |
172 | if (!priv) | |
173 | return -ENOMEM; | |
174 | ||
175 | priv->reset_gpio = -EINVAL; | |
176 | dev_set_drvdata(dev, priv); | |
177 | ||
fb668e73 DM |
178 | for (i = 0; i < ARRAY_SIZE(supply_names); i++) |
179 | priv->supplies[i].supply = supply_names[i]; | |
180 | ||
181 | ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(priv->supplies), | |
182 | priv->supplies); | |
183 | if (ret < 0) | |
184 | return ret; | |
185 | ||
cc289be8 DM |
186 | if (of_match_device(of_match_ptr(ak5386_dt_ids), dev)) |
187 | priv->reset_gpio = of_get_named_gpio(dev->of_node, | |
188 | "reset-gpio", 0); | |
189 | ||
190 | if (gpio_is_valid(priv->reset_gpio)) | |
191 | if (devm_gpio_request_one(dev, priv->reset_gpio, | |
192 | GPIOF_OUT_INIT_LOW, | |
193 | "AK5386 Reset")) | |
194 | priv->reset_gpio = -EINVAL; | |
195 | ||
12132de6 | 196 | return devm_snd_soc_register_component(dev, &soc_component_ak5386, |
cc289be8 DM |
197 | &ak5386_dai, 1); |
198 | } | |
199 | ||
cc289be8 DM |
200 | static struct platform_driver ak5386_driver = { |
201 | .probe = ak5386_probe, | |
cc289be8 DM |
202 | .driver = { |
203 | .name = "ak5386", | |
cc289be8 DM |
204 | .of_match_table = of_match_ptr(ak5386_dt_ids), |
205 | }, | |
206 | }; | |
207 | ||
208 | module_platform_driver(ak5386_driver); | |
209 | ||
210 | MODULE_DESCRIPTION("ASoC driver for AK5386 ADC"); | |
211 | MODULE_AUTHOR("Daniel Mack <zonque@gmail.com>"); | |
212 | MODULE_LICENSE("GPL"); |