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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 <linux/regmap.h>
25#include <sound/soc.h>
26#include <sound/initval.h>
27
28#include <linux/i2c.h>
29
30#include <linux/mfd/si476x-core.h>
31
32enum si476x_audio_registers {
33 SI476X_DIGITAL_IO_OUTPUT_FORMAT = 0x0203,
34 SI476X_DIGITAL_IO_OUTPUT_SAMPLE_RATE = 0x0202,
35};
36
37enum si476x_digital_io_output_format {
38 SI476X_DIGITAL_IO_SLOT_SIZE_SHIFT = 11,
39 SI476X_DIGITAL_IO_SAMPLE_SIZE_SHIFT = 8,
40};
41
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)
45
46enum 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),
52
53 SI476X_DAUDIO_MODE_IB = (1 << 5),
54 SI476X_DAUDIO_MODE_IF = (1 << 6),
55};
56
57enum 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,
62};
63
64static const struct snd_soc_dapm_widget si476x_dapm_widgets[] = {
65SND_SOC_DAPM_OUTPUT("LOUT"),
66SND_SOC_DAPM_OUTPUT("ROUT"),
67};
68
69static const struct snd_soc_dapm_route si476x_dapm_routes[] = {
70 { "Capture", NULL, "LOUT" },
71 { "Capture", NULL, "ROUT" },
72};
73
74static int si476x_codec_set_dai_fmt(struct snd_soc_dai *codec_dai,
75 unsigned int fmt)
76{
77 struct si476x_core *core = i2c_mfd_cell_to_core(codec_dai->dev);
78 int err;
79 u16 format = 0;
80
81 if ((fmt & SND_SOC_DAIFMT_MASTER_MASK) != SND_SOC_DAIFMT_CBS_CFS)
82 return -EINVAL;
83
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;
102 }
103
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;
115 }
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;
135 }
136 break;
137 default:
138 return -EINVAL;
139 }
140
141 si476x_core_lock(core);
142
143 err = snd_soc_update_bits(codec_dai->codec, SI476X_DIGITAL_IO_OUTPUT_FORMAT,
144 SI476X_DIGITAL_IO_OUTPUT_FORMAT_MASK,
145 format);
146
147 si476x_core_unlock(core);
148
149 if (err < 0) {
150 dev_err(codec_dai->codec->dev, "Failed to set output format\n");
151 return err;
152 }
153
154 return 0;
155}
156
157static int si476x_codec_hw_params(struct snd_pcm_substream *substream,
158 struct snd_pcm_hw_params *params,
159 struct snd_soc_dai *dai)
160{
161 struct si476x_core *core = i2c_mfd_cell_to_core(dai->dev);
162 int rate, width, err;
163
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;
168 }
169
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;
185 }
186
187 si476x_core_lock(core);
188
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;
194 }
195
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;
203 }
204
205out:
206 si476x_core_unlock(core);
207
208 return err;
209}
210
211static const struct snd_soc_dai_ops si476x_dai_ops = {
212 .hw_params = si476x_codec_hw_params,
213 .set_fmt = si476x_codec_set_dai_fmt,
214};
215
216static 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,
222
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
230 },
231 .ops = &si476x_dai_ops,
232};
233
234static struct regmap *si476x_get_regmap(struct device *dev)
235{
236 return dev_get_regmap(dev->parent, NULL);
237}
238
239static struct snd_soc_codec_driver soc_codec_dev_si476x = {
240 .get_regmap = si476x_get_regmap,
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 },
265 .probe = si476x_platform_probe,
266 .remove = si476x_platform_remove,
267};
268module_platform_driver(si476x_platform_driver);
269
270MODULE_AUTHOR("Andrey Smirnov <andrew.smirnov@gmail.com>");
271MODULE_DESCRIPTION("ASoC Si4761/64 codec driver");
272MODULE_LICENSE("GPL");
273
