x86/speculation/mds: Fix documentation typo
[linux/fpc-iii.git] / sound / soc / codecs / si476x.c
blob354dc0d64f11fbd29f59d324c8fd4fb9449acaee
1 /*
2 * sound/soc/codecs/si476x.c -- Codec driver for SI476X chips
4 * Copyright (C) 2012 Innovative Converged Devices(ICD)
5 * Copyright (C) 2013 Andrey Smirnov
7 * Author: Andrey Smirnov <andrew.smirnov@gmail.com>
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; version 2 of the License.
13 * This program is distributed in the hope that it will be useful, but
14 * WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * General Public License for more details.
20 #include <linux/module.h>
21 #include <linux/slab.h>
22 #include <sound/pcm.h>
23 #include <sound/pcm_params.h>
24 #include <linux/regmap.h>
25 #include <sound/soc.h>
26 #include <sound/initval.h>
28 #include <linux/i2c.h>
30 #include <linux/mfd/si476x-core.h>
32 enum si476x_audio_registers {
33 SI476X_DIGITAL_IO_OUTPUT_FORMAT = 0x0203,
34 SI476X_DIGITAL_IO_OUTPUT_SAMPLE_RATE = 0x0202,
37 enum si476x_digital_io_output_format {
38 SI476X_DIGITAL_IO_SLOT_SIZE_SHIFT = 11,
39 SI476X_DIGITAL_IO_SAMPLE_SIZE_SHIFT = 8,
42 #define SI476X_DIGITAL_IO_OUTPUT_WIDTH_MASK ((0x7 << SI476X_DIGITAL_IO_SLOT_SIZE_SHIFT) | \
43 (0x7 << SI476X_DIGITAL_IO_SAMPLE_SIZE_SHIFT))
44 #define SI476X_DIGITAL_IO_OUTPUT_FORMAT_MASK (0x7e)
46 enum si476x_daudio_formats {
47 SI476X_DAUDIO_MODE_I2S = (0x0 << 1),
48 SI476X_DAUDIO_MODE_DSP_A = (0x6 << 1),
49 SI476X_DAUDIO_MODE_DSP_B = (0x7 << 1),
50 SI476X_DAUDIO_MODE_LEFT_J = (0x8 << 1),
51 SI476X_DAUDIO_MODE_RIGHT_J = (0x9 << 1),
53 SI476X_DAUDIO_MODE_IB = (1 << 5),
54 SI476X_DAUDIO_MODE_IF = (1 << 6),
57 enum si476x_pcm_format {
58 SI476X_PCM_FORMAT_S8 = 2,
59 SI476X_PCM_FORMAT_S16_LE = 4,
60 SI476X_PCM_FORMAT_S20_3LE = 5,
61 SI476X_PCM_FORMAT_S24_LE = 6,
64 static const struct snd_soc_dapm_widget si476x_dapm_widgets[] = {
65 SND_SOC_DAPM_OUTPUT("LOUT"),
66 SND_SOC_DAPM_OUTPUT("ROUT"),
69 static const struct snd_soc_dapm_route si476x_dapm_routes[] = {
70 { "Capture", NULL, "LOUT" },
71 { "Capture", NULL, "ROUT" },
74 static int si476x_codec_set_dai_fmt(struct snd_soc_dai *codec_dai,
75 unsigned int fmt)
77 struct si476x_core *core = i2c_mfd_cell_to_core(codec_dai->dev);
78 int err;
79 u16 format = 0;
81 if ((fmt & SND_SOC_DAIFMT_MASTER_MASK) != SND_SOC_DAIFMT_CBS_CFS)
82 return -EINVAL;
84 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
85 case SND_SOC_DAIFMT_DSP_A:
86 format |= SI476X_DAUDIO_MODE_DSP_A;
87 break;
88 case SND_SOC_DAIFMT_DSP_B:
89 format |= SI476X_DAUDIO_MODE_DSP_B;
90 break;
91 case SND_SOC_DAIFMT_I2S:
92 format |= SI476X_DAUDIO_MODE_I2S;
93 break;
94 case SND_SOC_DAIFMT_RIGHT_J:
95 format |= SI476X_DAUDIO_MODE_RIGHT_J;
96 break;
97 case SND_SOC_DAIFMT_LEFT_J:
98 format |= SI476X_DAUDIO_MODE_LEFT_J;
99 break;
100 default:
101 return -EINVAL;
104 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
105 case SND_SOC_DAIFMT_DSP_A:
106 case SND_SOC_DAIFMT_DSP_B:
107 switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
108 case SND_SOC_DAIFMT_NB_NF:
109 break;
110 case SND_SOC_DAIFMT_IB_NF:
111 format |= SI476X_DAUDIO_MODE_IB;
112 break;
113 default:
114 return -EINVAL;
116 break;
117 case SND_SOC_DAIFMT_I2S:
118 case SND_SOC_DAIFMT_RIGHT_J:
119 case SND_SOC_DAIFMT_LEFT_J:
120 switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
121 case SND_SOC_DAIFMT_NB_NF:
122 break;
123 case SND_SOC_DAIFMT_IB_IF:
124 format |= SI476X_DAUDIO_MODE_IB |
125 SI476X_DAUDIO_MODE_IF;
126 break;
127 case SND_SOC_DAIFMT_IB_NF:
128 format |= SI476X_DAUDIO_MODE_IB;
129 break;
130 case SND_SOC_DAIFMT_NB_IF:
131 format |= SI476X_DAUDIO_MODE_IF;
132 break;
133 default:
134 return -EINVAL;
136 break;
137 default:
138 return -EINVAL;
141 si476x_core_lock(core);
143 err = snd_soc_update_bits(codec_dai->codec, SI476X_DIGITAL_IO_OUTPUT_FORMAT,
144 SI476X_DIGITAL_IO_OUTPUT_FORMAT_MASK,
145 format);
147 si476x_core_unlock(core);
149 if (err < 0) {
150 dev_err(codec_dai->codec->dev, "Failed to set output format\n");
151 return err;
154 return 0;
157 static int si476x_codec_hw_params(struct snd_pcm_substream *substream,
158 struct snd_pcm_hw_params *params,
159 struct snd_soc_dai *dai)
161 struct si476x_core *core = i2c_mfd_cell_to_core(dai->dev);
162 int rate, width, err;
164 rate = params_rate(params);
165 if (rate < 32000 || rate > 48000) {
166 dev_err(dai->codec->dev, "Rate: %d is not supported\n", rate);
167 return -EINVAL;
170 switch (params_width(params)) {
171 case 8:
172 width = SI476X_PCM_FORMAT_S8;
173 break;
174 case 16:
175 width = SI476X_PCM_FORMAT_S16_LE;
176 break;
177 case 20:
178 width = SI476X_PCM_FORMAT_S20_3LE;
179 break;
180 case 24:
181 width = SI476X_PCM_FORMAT_S24_LE;
182 break;
183 default:
184 return -EINVAL;
187 si476x_core_lock(core);
189 err = snd_soc_write(dai->codec, SI476X_DIGITAL_IO_OUTPUT_SAMPLE_RATE,
190 rate);
191 if (err < 0) {
192 dev_err(dai->codec->dev, "Failed to set sample rate\n");
193 goto out;
196 err = snd_soc_update_bits(dai->codec, SI476X_DIGITAL_IO_OUTPUT_FORMAT,
197 SI476X_DIGITAL_IO_OUTPUT_WIDTH_MASK,
198 (width << SI476X_DIGITAL_IO_SLOT_SIZE_SHIFT) |
199 (width << SI476X_DIGITAL_IO_SAMPLE_SIZE_SHIFT));
200 if (err < 0) {
201 dev_err(dai->codec->dev, "Failed to set output width\n");
202 goto out;
205 out:
206 si476x_core_unlock(core);
208 return err;
211 static const struct snd_soc_dai_ops si476x_dai_ops = {
212 .hw_params = si476x_codec_hw_params,
213 .set_fmt = si476x_codec_set_dai_fmt,
216 static struct snd_soc_dai_driver si476x_dai = {
217 .name = "si476x-codec",
218 .capture = {
219 .stream_name = "Capture",
220 .channels_min = 2,
221 .channels_max = 2,
223 .rates = SNDRV_PCM_RATE_32000 |
224 SNDRV_PCM_RATE_44100 |
225 SNDRV_PCM_RATE_48000,
226 .formats = SNDRV_PCM_FMTBIT_S8 |
227 SNDRV_PCM_FMTBIT_S16_LE |
228 SNDRV_PCM_FMTBIT_S20_3LE |
229 SNDRV_PCM_FMTBIT_S24_LE
231 .ops = &si476x_dai_ops,
234 static struct regmap *si476x_get_regmap(struct device *dev)
236 return dev_get_regmap(dev->parent, NULL);
239 static const struct snd_soc_codec_driver soc_codec_dev_si476x = {
240 .get_regmap = si476x_get_regmap,
241 .component_driver = {
242 .dapm_widgets = si476x_dapm_widgets,
243 .num_dapm_widgets = ARRAY_SIZE(si476x_dapm_widgets),
244 .dapm_routes = si476x_dapm_routes,
245 .num_dapm_routes = ARRAY_SIZE(si476x_dapm_routes),
249 static int si476x_platform_probe(struct platform_device *pdev)
251 return snd_soc_register_codec(&pdev->dev, &soc_codec_dev_si476x,
252 &si476x_dai, 1);
255 static int si476x_platform_remove(struct platform_device *pdev)
257 snd_soc_unregister_codec(&pdev->dev);
258 return 0;
261 MODULE_ALIAS("platform:si476x-codec");
263 static struct platform_driver si476x_platform_driver = {
264 .driver = {
265 .name = "si476x-codec",
267 .probe = si476x_platform_probe,
268 .remove = si476x_platform_remove,
270 module_platform_driver(si476x_platform_driver);
272 MODULE_AUTHOR("Andrey Smirnov <andrew.smirnov@gmail.com>");
273 MODULE_DESCRIPTION("ASoC Si4761/64 codec driver");
274 MODULE_LICENSE("GPL");