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20#include <linux/module.h>
21#include <linux/slab.h>
22#include <sound/pcm.h>
23#include <sound/pcm_params.h>
24#include <sound/soc.h>
25#include <sound/initval.h>
26
27#include <linux/i2c.h>
28
29#include <linux/mfd/si476x-core.h>
30
31enum si476x_audio_registers {
32 SI476X_DIGITAL_IO_OUTPUT_FORMAT = 0x0203,
33 SI476X_DIGITAL_IO_OUTPUT_SAMPLE_RATE = 0x0202,
34};
35
36enum si476x_digital_io_output_format {
37 SI476X_DIGITAL_IO_SLOT_SIZE_SHIFT = 11,
38 SI476X_DIGITAL_IO_SAMPLE_SIZE_SHIFT = 8,
39};
40
41#define SI476X_DIGITAL_IO_OUTPUT_WIDTH_MASK ((0x7 << SI476X_DIGITAL_IO_SLOT_SIZE_SHIFT) | \
42 (0x7 << SI476X_DIGITAL_IO_SAMPLE_SIZE_SHIFT))
43#define SI476X_DIGITAL_IO_OUTPUT_FORMAT_MASK (0x7e)
44
45enum si476x_daudio_formats {
46 SI476X_DAUDIO_MODE_I2S = (0x0 << 1),
47 SI476X_DAUDIO_MODE_DSP_A = (0x6 << 1),
48 SI476X_DAUDIO_MODE_DSP_B = (0x7 << 1),
49 SI476X_DAUDIO_MODE_LEFT_J = (0x8 << 1),
50 SI476X_DAUDIO_MODE_RIGHT_J = (0x9 << 1),
51
52 SI476X_DAUDIO_MODE_IB = (1 << 5),
53 SI476X_DAUDIO_MODE_IF = (1 << 6),
54};
55
56enum si476x_pcm_format {
57 SI476X_PCM_FORMAT_S8 = 2,
58 SI476X_PCM_FORMAT_S16_LE = 4,
59 SI476X_PCM_FORMAT_S20_3LE = 5,
60 SI476X_PCM_FORMAT_S24_LE = 6,
61};
62
63static const struct snd_soc_dapm_widget si476x_dapm_widgets[] = {
64SND_SOC_DAPM_OUTPUT("LOUT"),
65SND_SOC_DAPM_OUTPUT("ROUT"),
66};
67
68static const struct snd_soc_dapm_route si476x_dapm_routes[] = {
69 { "Capture", NULL, "LOUT" },
70 { "Capture", NULL, "ROUT" },
71};
72
73static int si476x_codec_set_dai_fmt(struct snd_soc_dai *codec_dai,
74 unsigned int fmt)
75{
76 struct si476x_core *core = i2c_mfd_cell_to_core(codec_dai->dev);
77 int err;
78 u16 format = 0;
79
80 if ((fmt & SND_SOC_DAIFMT_MASTER_MASK) != SND_SOC_DAIFMT_CBS_CFS)
81 return -EINVAL;
82
83 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
84 case SND_SOC_DAIFMT_DSP_A:
85 format |= SI476X_DAUDIO_MODE_DSP_A;
86 break;
87 case SND_SOC_DAIFMT_DSP_B:
88 format |= SI476X_DAUDIO_MODE_DSP_B;
89 break;
90 case SND_SOC_DAIFMT_I2S:
91 format |= SI476X_DAUDIO_MODE_I2S;
92 break;
93 case SND_SOC_DAIFMT_RIGHT_J:
94 format |= SI476X_DAUDIO_MODE_RIGHT_J;
95 break;
96 case SND_SOC_DAIFMT_LEFT_J:
97 format |= SI476X_DAUDIO_MODE_LEFT_J;
98 break;
99 default:
100 return -EINVAL;
101 }
102
103 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
104 case SND_SOC_DAIFMT_DSP_A:
105 case SND_SOC_DAIFMT_DSP_B:
106 switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
107 case SND_SOC_DAIFMT_NB_NF:
108 break;
109 case SND_SOC_DAIFMT_IB_NF:
110 format |= SI476X_DAUDIO_MODE_IB;
111 break;
112 default:
113 return -EINVAL;
114 }
115 break;
116 case SND_SOC_DAIFMT_I2S:
117 case SND_SOC_DAIFMT_RIGHT_J:
118 case SND_SOC_DAIFMT_LEFT_J:
119 switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
120 case SND_SOC_DAIFMT_NB_NF:
121 break;
122 case SND_SOC_DAIFMT_IB_IF:
123 format |= SI476X_DAUDIO_MODE_IB |
124 SI476X_DAUDIO_MODE_IF;
125 break;
126 case SND_SOC_DAIFMT_IB_NF:
127 format |= SI476X_DAUDIO_MODE_IB;
128 break;
129 case SND_SOC_DAIFMT_NB_IF:
130 format |= SI476X_DAUDIO_MODE_IF;
131 break;
132 default:
133 return -EINVAL;
134 }
135 break;
136 default:
137 return -EINVAL;
138 }
139
140 si476x_core_lock(core);
141
142 err = snd_soc_update_bits(codec_dai->codec, SI476X_DIGITAL_IO_OUTPUT_FORMAT,
143 SI476X_DIGITAL_IO_OUTPUT_FORMAT_MASK,
144 format);
145
146 si476x_core_unlock(core);
147
148 if (err < 0) {
149 dev_err(codec_dai->codec->dev, "Failed to set output format\n");
150 return err;
151 }
152
153 return 0;
154}
155
156static int si476x_codec_hw_params(struct snd_pcm_substream *substream,
157 struct snd_pcm_hw_params *params,
158 struct snd_soc_dai *dai)
159{
160 struct si476x_core *core = i2c_mfd_cell_to_core(dai->dev);
161 int rate, width, err;
162
163 rate = params_rate(params);
164 if (rate < 32000 || rate > 48000) {
165 dev_err(dai->codec->dev, "Rate: %d is not supported\n", rate);
166 return -EINVAL;
167 }
168
169 switch (params_format(params)) {
170 case SNDRV_PCM_FORMAT_S8:
171 width = SI476X_PCM_FORMAT_S8;
172 break;
173 case SNDRV_PCM_FORMAT_S16_LE:
174 width = SI476X_PCM_FORMAT_S16_LE;
175 break;
176 case SNDRV_PCM_FORMAT_S20_3LE:
177 width = SI476X_PCM_FORMAT_S20_3LE;
178 break;
179 case SNDRV_PCM_FORMAT_S24_LE:
180 width = SI476X_PCM_FORMAT_S24_LE;
181 break;
182 default:
183 return -EINVAL;
184 }
185
186 si476x_core_lock(core);
187
188 err = snd_soc_write(dai->codec, SI476X_DIGITAL_IO_OUTPUT_SAMPLE_RATE,
189 rate);
190 if (err < 0) {
191 dev_err(dai->codec->dev, "Failed to set sample rate\n");
192 goto out;
193 }
194
195 err = snd_soc_update_bits(dai->codec, SI476X_DIGITAL_IO_OUTPUT_FORMAT,
196 SI476X_DIGITAL_IO_OUTPUT_WIDTH_MASK,
197 (width << SI476X_DIGITAL_IO_SLOT_SIZE_SHIFT) |
198 (width << SI476X_DIGITAL_IO_SAMPLE_SIZE_SHIFT));
199 if (err < 0) {
200 dev_err(dai->codec->dev, "Failed to set output width\n");
201 goto out;
202 }
203
204out:
205 si476x_core_unlock(core);
206
207 return err;
208}
209
210static int si476x_codec_probe(struct snd_soc_codec *codec)
211{
212 codec->control_data = dev_get_regmap(codec->dev->parent, NULL);
213 return 0;
214}
215
216static struct snd_soc_dai_ops si476x_dai_ops = {
217 .hw_params = si476x_codec_hw_params,
218 .set_fmt = si476x_codec_set_dai_fmt,
219};
220
221static struct snd_soc_dai_driver si476x_dai = {
222 .name = "si476x-codec",
223 .capture = {
224 .stream_name = "Capture",
225 .channels_min = 2,
226 .channels_max = 2,
227
228 .rates = SNDRV_PCM_RATE_32000 |
229 SNDRV_PCM_RATE_44100 |
230 SNDRV_PCM_RATE_48000,
231 .formats = SNDRV_PCM_FMTBIT_S8 |
232 SNDRV_PCM_FMTBIT_S16_LE |
233 SNDRV_PCM_FMTBIT_S20_3LE |
234 SNDRV_PCM_FMTBIT_S24_LE
235 },
236 .ops = &si476x_dai_ops,
237};
238
239static struct snd_soc_codec_driver soc_codec_dev_si476x = {
240 .probe = si476x_codec_probe,
241 .dapm_widgets = si476x_dapm_widgets,
242 .num_dapm_widgets = ARRAY_SIZE(si476x_dapm_widgets),
243 .dapm_routes = si476x_dapm_routes,
244 .num_dapm_routes = ARRAY_SIZE(si476x_dapm_routes),
245};
246
247static int si476x_platform_probe(struct platform_device *pdev)
248{
249 return snd_soc_register_codec(&pdev->dev, &soc_codec_dev_si476x,
250 &si476x_dai, 1);
251}
252
253static int si476x_platform_remove(struct platform_device *pdev)
254{
255 snd_soc_unregister_codec(&pdev->dev);
256 return 0;
257}
258
259MODULE_ALIAS("platform:si476x-codec");
260
261static struct platform_driver si476x_platform_driver = {
262 .driver = {
263 .name = "si476x-codec",
264 .owner = THIS_MODULE,
265 },
266 .probe = si476x_platform_probe,
267 .remove = si476x_platform_remove,
268};
269module_platform_driver(si476x_platform_driver);
270
271MODULE_AUTHOR("Andrey Smirnov <andrew.smirnov@gmail.com>");
272MODULE_DESCRIPTION("ASoC Si4761/64 codec driver");
273MODULE_LICENSE("GPL");
274
