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18#include <linux/module.h>
19#include <linux/init.h>
20#include <linux/i2c.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/tlv.h>
26
27#include "max9850.h"
28
29struct max9850_priv {
30 unsigned int sysclk;
31};
32
33
34static const u8 max9850_reg[MAX9850_CACHEREGNUM] = {
35 0x00, 0x00, 0x0c, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
36};
37
38
39
40static int max9850_volatile_register(struct snd_soc_codec *codec,
41 unsigned int reg)
42{
43 switch (reg) {
44 case MAX9850_STATUSA:
45 case MAX9850_STATUSB:
46 return 1;
47 default:
48 return 0;
49 }
50}
51
52static const unsigned int max9850_tlv[] = {
53 TLV_DB_RANGE_HEAD(4),
54 0x18, 0x1f, TLV_DB_SCALE_ITEM(-7450, 400, 0),
55 0x20, 0x33, TLV_DB_SCALE_ITEM(-4150, 200, 0),
56 0x34, 0x37, TLV_DB_SCALE_ITEM(-150, 100, 0),
57 0x38, 0x3f, TLV_DB_SCALE_ITEM(250, 50, 0),
58};
59
60static const struct snd_kcontrol_new max9850_controls[] = {
61SOC_SINGLE_TLV("Headphone Volume", MAX9850_VOLUME, 0, 0x3f, 1, max9850_tlv),
62SOC_SINGLE("Headphone Switch", MAX9850_VOLUME, 7, 1, 1),
63SOC_SINGLE("Mono Switch", MAX9850_GENERAL_PURPOSE, 2, 1, 0),
64};
65
66static const struct snd_kcontrol_new max9850_mixer_controls[] = {
67 SOC_DAPM_SINGLE("Line In Switch", MAX9850_ENABLE, 1, 1, 0),
68};
69
70static const struct snd_soc_dapm_widget max9850_dapm_widgets[] = {
71SND_SOC_DAPM_SUPPLY("Charge Pump 1", MAX9850_ENABLE, 4, 0, NULL, 0),
72SND_SOC_DAPM_SUPPLY("Charge Pump 2", MAX9850_ENABLE, 5, 0, NULL, 0),
73SND_SOC_DAPM_SUPPLY("MCLK", MAX9850_ENABLE, 6, 0, NULL, 0),
74SND_SOC_DAPM_SUPPLY("SHDN", MAX9850_ENABLE, 7, 0, NULL, 0),
75SND_SOC_DAPM_MIXER_NAMED_CTL("Output Mixer", MAX9850_ENABLE, 2, 0,
76 &max9850_mixer_controls[0],
77 ARRAY_SIZE(max9850_mixer_controls)),
78SND_SOC_DAPM_PGA("Headphone Output", MAX9850_ENABLE, 3, 0, NULL, 0),
79SND_SOC_DAPM_DAC("DAC", "HiFi Playback", MAX9850_ENABLE, 0, 0),
80SND_SOC_DAPM_OUTPUT("OUTL"),
81SND_SOC_DAPM_OUTPUT("HPL"),
82SND_SOC_DAPM_OUTPUT("OUTR"),
83SND_SOC_DAPM_OUTPUT("HPR"),
84SND_SOC_DAPM_MIXER("Line Input", SND_SOC_NOPM, 0, 0, NULL, 0),
85SND_SOC_DAPM_INPUT("INL"),
86SND_SOC_DAPM_INPUT("INR"),
87};
88
89static const struct snd_soc_dapm_route intercon[] = {
90
91 {"Output Mixer", NULL, "DAC"},
92 {"Output Mixer", "Line In Switch", "Line Input"},
93
94
95 {"Headphone Output", NULL, "Output Mixer"},
96 {"HPL", NULL, "Headphone Output"},
97 {"HPR", NULL, "Headphone Output"},
98 {"OUTL", NULL, "Output Mixer"},
99 {"OUTR", NULL, "Output Mixer"},
100
101
102 {"Line Input", NULL, "INL"},
103 {"Line Input", NULL, "INR"},
104
105
106 {"Output Mixer", NULL, "Charge Pump 1"},
107 {"Output Mixer", NULL, "Charge Pump 2"},
108 {"Output Mixer", NULL, "SHDN"},
109 {"DAC", NULL, "MCLK"},
110};
111
112static int max9850_hw_params(struct snd_pcm_substream *substream,
113 struct snd_pcm_hw_params *params,
114 struct snd_soc_dai *dai)
115{
116 struct snd_soc_codec *codec = dai->codec;
117 struct max9850_priv *max9850 = snd_soc_codec_get_drvdata(codec);
118 u64 lrclk_div;
119 u8 sf, da;
120
121 if (!max9850->sysclk)
122 return -EINVAL;
123
124
125 sf = (snd_soc_read(codec, MAX9850_CLOCK) >> 2) + 1;
126 lrclk_div = (1 << 22);
127 lrclk_div *= params_rate(params);
128 lrclk_div *= sf;
129 do_div(lrclk_div, max9850->sysclk);
130
131 snd_soc_write(codec, MAX9850_LRCLK_MSB, (lrclk_div >> 8) & 0x7f);
132 snd_soc_write(codec, MAX9850_LRCLK_LSB, lrclk_div & 0xff);
133
134 switch (params_format(params)) {
135 case SNDRV_PCM_FORMAT_S16_LE:
136 da = 0;
137 break;
138 case SNDRV_PCM_FORMAT_S20_3LE:
139 da = 0x2;
140 break;
141 case SNDRV_PCM_FORMAT_S24_LE:
142 da = 0x3;
143 break;
144 default:
145 return -EINVAL;
146 }
147 snd_soc_update_bits(codec, MAX9850_DIGITAL_AUDIO, 0x3, da);
148
149 return 0;
150}
151
152static int max9850_set_dai_sysclk(struct snd_soc_dai *codec_dai,
153 int clk_id, unsigned int freq, int dir)
154{
155 struct snd_soc_codec *codec = codec_dai->codec;
156 struct max9850_priv *max9850 = snd_soc_codec_get_drvdata(codec);
157
158
159 if (freq <= 13000000)
160 snd_soc_write(codec, MAX9850_CLOCK, 0x0);
161 else if (freq <= 26000000)
162 snd_soc_write(codec, MAX9850_CLOCK, 0x4);
163 else if (freq <= 40000000)
164 snd_soc_write(codec, MAX9850_CLOCK, 0x8);
165 else
166 return -EINVAL;
167
168 max9850->sysclk = freq;
169 return 0;
170}
171
172static int max9850_set_dai_fmt(struct snd_soc_dai *codec_dai, unsigned int fmt)
173{
174 struct snd_soc_codec *codec = codec_dai->codec;
175 u8 da = 0;
176
177
178 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
179 case SND_SOC_DAIFMT_CBM_CFM:
180 da |= MAX9850_MASTER;
181 break;
182 case SND_SOC_DAIFMT_CBS_CFS:
183 break;
184 default:
185 return -EINVAL;
186 }
187
188
189 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
190 case SND_SOC_DAIFMT_I2S:
191 da |= MAX9850_DLY;
192 break;
193 case SND_SOC_DAIFMT_RIGHT_J:
194 da |= MAX9850_RTJ;
195 break;
196 case SND_SOC_DAIFMT_LEFT_J:
197 break;
198 default:
199 return -EINVAL;
200 }
201
202
203 switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
204 case SND_SOC_DAIFMT_NB_NF:
205 break;
206 case SND_SOC_DAIFMT_IB_IF:
207 da |= MAX9850_BCINV | MAX9850_INV;
208 break;
209 case SND_SOC_DAIFMT_IB_NF:
210 da |= MAX9850_BCINV;
211 break;
212 case SND_SOC_DAIFMT_NB_IF:
213 da |= MAX9850_INV;
214 break;
215 default:
216 return -EINVAL;
217 }
218
219
220 snd_soc_write(codec, MAX9850_DIGITAL_AUDIO, da);
221
222 return 0;
223}
224
225static int max9850_set_bias_level(struct snd_soc_codec *codec,
226 enum snd_soc_bias_level level)
227{
228 int ret;
229
230 switch (level) {
231 case SND_SOC_BIAS_ON:
232 break;
233 case SND_SOC_BIAS_PREPARE:
234 break;
235 case SND_SOC_BIAS_STANDBY:
236 if (codec->dapm.bias_level == SND_SOC_BIAS_OFF) {
237 ret = snd_soc_cache_sync(codec);
238 if (ret) {
239 dev_err(codec->dev,
240 "Failed to sync cache: %d\n", ret);
241 return ret;
242 }
243 }
244 break;
245 case SND_SOC_BIAS_OFF:
246 break;
247 }
248 codec->dapm.bias_level = level;
249 return 0;
250}
251
252#define MAX9850_RATES SNDRV_PCM_RATE_8000_48000
253
254#define MAX9850_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
255 SNDRV_PCM_FMTBIT_S24_LE)
256
257static struct snd_soc_dai_ops max9850_dai_ops = {
258 .hw_params = max9850_hw_params,
259 .set_sysclk = max9850_set_dai_sysclk,
260 .set_fmt = max9850_set_dai_fmt,
261};
262
263static struct snd_soc_dai_driver max9850_dai = {
264 .name = "max9850-hifi",
265 .playback = {
266 .stream_name = "Playback",
267 .channels_min = 1,
268 .channels_max = 2,
269 .rates = MAX9850_RATES,
270 .formats = MAX9850_FORMATS
271 },
272 .ops = &max9850_dai_ops,
273};
274
275#ifdef CONFIG_PM
276static int max9850_suspend(struct snd_soc_codec *codec, pm_message_t state)
277{
278 max9850_set_bias_level(codec, SND_SOC_BIAS_OFF);
279
280 return 0;
281}
282
283static int max9850_resume(struct snd_soc_codec *codec)
284{
285 max9850_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
286
287 return 0;
288}
289#else
290#define max9850_suspend NULL
291#define max9850_resume NULL
292#endif
293
294static int max9850_probe(struct snd_soc_codec *codec)
295{
296 struct snd_soc_dapm_context *dapm = &codec->dapm;
297 int ret;
298
299 ret = snd_soc_codec_set_cache_io(codec, 8, 8, SND_SOC_I2C);
300 if (ret < 0) {
301 dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret);
302 return ret;
303 }
304
305
306 snd_soc_update_bits(codec, MAX9850_GENERAL_PURPOSE, 1, 1);
307
308 snd_soc_update_bits(codec, MAX9850_VOLUME, 0x40, 0x40);
309
310 snd_soc_update_bits(codec, MAX9850_CHARGE_PUMP, 0xff, 0xc0);
311
312 snd_soc_dapm_new_controls(dapm, max9850_dapm_widgets,
313 ARRAY_SIZE(max9850_dapm_widgets));
314 snd_soc_dapm_add_routes(dapm, intercon, ARRAY_SIZE(intercon));
315
316 snd_soc_add_controls(codec, max9850_controls,
317 ARRAY_SIZE(max9850_controls));
318
319 return 0;
320}
321
322static struct snd_soc_codec_driver soc_codec_dev_max9850 = {
323 .probe = max9850_probe,
324 .suspend = max9850_suspend,
325 .resume = max9850_resume,
326 .set_bias_level = max9850_set_bias_level,
327 .reg_cache_size = ARRAY_SIZE(max9850_reg),
328 .reg_word_size = sizeof(u8),
329 .reg_cache_default = max9850_reg,
330 .volatile_register = max9850_volatile_register,
331};
332
333static int __devinit max9850_i2c_probe(struct i2c_client *i2c,
334 const struct i2c_device_id *id)
335{
336 struct max9850_priv *max9850;
337 int ret;
338
339 max9850 = kzalloc(sizeof(struct max9850_priv), GFP_KERNEL);
340 if (max9850 == NULL)
341 return -ENOMEM;
342
343 i2c_set_clientdata(i2c, max9850);
344
345 ret = snd_soc_register_codec(&i2c->dev,
346 &soc_codec_dev_max9850, &max9850_dai, 1);
347 if (ret < 0)
348 kfree(max9850);
349 return ret;
350}
351
352static __devexit int max9850_i2c_remove(struct i2c_client *client)
353{
354 snd_soc_unregister_codec(&client->dev);
355 kfree(i2c_get_clientdata(client));
356 return 0;
357}
358
359static const struct i2c_device_id max9850_i2c_id[] = {
360 { "max9850", 0 },
361 { }
362};
363MODULE_DEVICE_TABLE(i2c, max9850_i2c_id);
364
365static struct i2c_driver max9850_i2c_driver = {
366 .driver = {
367 .name = "max9850",
368 .owner = THIS_MODULE,
369 },
370 .probe = max9850_i2c_probe,
371 .remove = __devexit_p(max9850_i2c_remove),
372 .id_table = max9850_i2c_id,
373};
374
375static int __init max9850_init(void)
376{
377 return i2c_add_driver(&max9850_i2c_driver);
378}
379module_init(max9850_init);
380
381static void __exit max9850_exit(void)
382{
383 i2c_del_driver(&max9850_i2c_driver);
384}
385module_exit(max9850_exit);
386
387MODULE_AUTHOR("Christian Glindkamp <christian.glindkamp@taskit.de>");
388MODULE_DESCRIPTION("ASoC MAX9850 codec driver");
389MODULE_LICENSE("GPL");
390
