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13#include <linux/module.h>
14#include <linux/init.h>
15#include <linux/i2c.h>
16#include <linux/regmap.h>
17#include <linux/slab.h>
18#include <sound/pcm.h>
19#include <sound/pcm_params.h>
20#include <sound/soc.h>
21#include <sound/tlv.h>
22
23#include "max9850.h"
24
25struct max9850_priv {
26 struct regmap *regmap;
27 unsigned int sysclk;
28};
29
30
31static const struct reg_default max9850_reg[] = {
32 { 2, 0x0c },
33 { 3, 0x00 },
34 { 4, 0x00 },
35 { 5, 0x00 },
36 { 6, 0x00 },
37 { 7, 0x00 },
38 { 8, 0x00 },
39 { 9, 0x00 },
40 { 10, 0x00 },
41};
42
43
44
45static bool max9850_volatile_register(struct device *dev, unsigned int reg)
46{
47 switch (reg) {
48 case MAX9850_STATUSA:
49 case MAX9850_STATUSB:
50 return true;
51 default:
52 return false;
53 }
54}
55
56static const struct regmap_config max9850_regmap = {
57 .reg_bits = 8,
58 .val_bits = 8,
59
60 .max_register = MAX9850_DIGITAL_AUDIO,
61 .volatile_reg = max9850_volatile_register,
62 .cache_type = REGCACHE_RBTREE,
63};
64
65static const DECLARE_TLV_DB_RANGE(max9850_tlv,
66 0x18, 0x1f, TLV_DB_SCALE_ITEM(-7450, 400, 0),
67 0x20, 0x33, TLV_DB_SCALE_ITEM(-4150, 200, 0),
68 0x34, 0x37, TLV_DB_SCALE_ITEM(-150, 100, 0),
69 0x38, 0x3f, TLV_DB_SCALE_ITEM(250, 50, 0)
70);
71
72static const struct snd_kcontrol_new max9850_controls[] = {
73SOC_SINGLE_TLV("Headphone Volume", MAX9850_VOLUME, 0, 0x3f, 1, max9850_tlv),
74SOC_SINGLE("Headphone Switch", MAX9850_VOLUME, 7, 1, 1),
75SOC_SINGLE("Mono Switch", MAX9850_GENERAL_PURPOSE, 2, 1, 0),
76};
77
78static const struct snd_kcontrol_new max9850_mixer_controls[] = {
79 SOC_DAPM_SINGLE("Line In Switch", MAX9850_ENABLE, 1, 1, 0),
80};
81
82static const struct snd_soc_dapm_widget max9850_dapm_widgets[] = {
83SND_SOC_DAPM_SUPPLY("Charge Pump 1", MAX9850_ENABLE, 4, 0, NULL, 0),
84SND_SOC_DAPM_SUPPLY("Charge Pump 2", MAX9850_ENABLE, 5, 0, NULL, 0),
85SND_SOC_DAPM_SUPPLY("MCLK", MAX9850_ENABLE, 6, 0, NULL, 0),
86SND_SOC_DAPM_SUPPLY("SHDN", MAX9850_ENABLE, 7, 0, NULL, 0),
87SND_SOC_DAPM_MIXER_NAMED_CTL("Output Mixer", MAX9850_ENABLE, 2, 0,
88 &max9850_mixer_controls[0],
89 ARRAY_SIZE(max9850_mixer_controls)),
90SND_SOC_DAPM_PGA("Headphone Output", MAX9850_ENABLE, 3, 0, NULL, 0),
91SND_SOC_DAPM_DAC("DAC", "HiFi Playback", MAX9850_ENABLE, 0, 0),
92SND_SOC_DAPM_OUTPUT("OUTL"),
93SND_SOC_DAPM_OUTPUT("HPL"),
94SND_SOC_DAPM_OUTPUT("OUTR"),
95SND_SOC_DAPM_OUTPUT("HPR"),
96SND_SOC_DAPM_MIXER("Line Input", SND_SOC_NOPM, 0, 0, NULL, 0),
97SND_SOC_DAPM_INPUT("INL"),
98SND_SOC_DAPM_INPUT("INR"),
99};
100
101static const struct snd_soc_dapm_route max9850_dapm_routes[] = {
102
103 {"Output Mixer", NULL, "DAC"},
104 {"Output Mixer", "Line In Switch", "Line Input"},
105
106
107 {"Headphone Output", NULL, "Output Mixer"},
108 {"HPL", NULL, "Headphone Output"},
109 {"HPR", NULL, "Headphone Output"},
110 {"OUTL", NULL, "Output Mixer"},
111 {"OUTR", NULL, "Output Mixer"},
112
113
114 {"Line Input", NULL, "INL"},
115 {"Line Input", NULL, "INR"},
116
117
118 {"Output Mixer", NULL, "Charge Pump 1"},
119 {"Output Mixer", NULL, "Charge Pump 2"},
120 {"Output Mixer", NULL, "SHDN"},
121 {"DAC", NULL, "MCLK"},
122};
123
124static int max9850_hw_params(struct snd_pcm_substream *substream,
125 struct snd_pcm_hw_params *params,
126 struct snd_soc_dai *dai)
127{
128 struct snd_soc_component *component = dai->component;
129 struct max9850_priv *max9850 = snd_soc_component_get_drvdata(component);
130 u64 lrclk_div;
131 u8 sf, da;
132
133 if (!max9850->sysclk)
134 return -EINVAL;
135
136
137 sf = (snd_soc_component_read32(component, MAX9850_CLOCK) >> 2) + 1;
138 lrclk_div = (1 << 22);
139 lrclk_div *= params_rate(params);
140 lrclk_div *= sf;
141 do_div(lrclk_div, max9850->sysclk);
142
143 snd_soc_component_write(component, MAX9850_LRCLK_MSB, (lrclk_div >> 8) & 0x7f);
144 snd_soc_component_write(component, MAX9850_LRCLK_LSB, lrclk_div & 0xff);
145
146 switch (params_width(params)) {
147 case 16:
148 da = 0;
149 break;
150 case 20:
151 da = 0x2;
152 break;
153 case 24:
154 da = 0x3;
155 break;
156 default:
157 return -EINVAL;
158 }
159 snd_soc_component_update_bits(component, MAX9850_DIGITAL_AUDIO, 0x3, da);
160
161 return 0;
162}
163
164static int max9850_set_dai_sysclk(struct snd_soc_dai *codec_dai,
165 int clk_id, unsigned int freq, int dir)
166{
167 struct snd_soc_component *component = codec_dai->component;
168 struct max9850_priv *max9850 = snd_soc_component_get_drvdata(component);
169
170
171 if (freq <= 13000000)
172 snd_soc_component_write(component, MAX9850_CLOCK, 0x0);
173 else if (freq <= 26000000)
174 snd_soc_component_write(component, MAX9850_CLOCK, 0x4);
175 else if (freq <= 40000000)
176 snd_soc_component_write(component, MAX9850_CLOCK, 0x8);
177 else
178 return -EINVAL;
179
180 max9850->sysclk = freq;
181 return 0;
182}
183
184static int max9850_set_dai_fmt(struct snd_soc_dai *codec_dai, unsigned int fmt)
185{
186 struct snd_soc_component *component = codec_dai->component;
187 u8 da = 0;
188
189
190 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
191 case SND_SOC_DAIFMT_CBM_CFM:
192 da |= MAX9850_MASTER;
193 break;
194 case SND_SOC_DAIFMT_CBS_CFS:
195 break;
196 default:
197 return -EINVAL;
198 }
199
200
201 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
202 case SND_SOC_DAIFMT_I2S:
203 da |= MAX9850_DLY;
204 break;
205 case SND_SOC_DAIFMT_RIGHT_J:
206 da |= MAX9850_RTJ;
207 break;
208 case SND_SOC_DAIFMT_LEFT_J:
209 break;
210 default:
211 return -EINVAL;
212 }
213
214
215 switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
216 case SND_SOC_DAIFMT_NB_NF:
217 break;
218 case SND_SOC_DAIFMT_IB_IF:
219 da |= MAX9850_BCINV | MAX9850_INV;
220 break;
221 case SND_SOC_DAIFMT_IB_NF:
222 da |= MAX9850_BCINV;
223 break;
224 case SND_SOC_DAIFMT_NB_IF:
225 da |= MAX9850_INV;
226 break;
227 default:
228 return -EINVAL;
229 }
230
231
232 snd_soc_component_write(component, MAX9850_DIGITAL_AUDIO, da);
233
234 return 0;
235}
236
237static int max9850_set_bias_level(struct snd_soc_component *component,
238 enum snd_soc_bias_level level)
239{
240 struct max9850_priv *max9850 = snd_soc_component_get_drvdata(component);
241 int ret;
242
243 switch (level) {
244 case SND_SOC_BIAS_ON:
245 break;
246 case SND_SOC_BIAS_PREPARE:
247 break;
248 case SND_SOC_BIAS_STANDBY:
249 if (snd_soc_component_get_bias_level(component) == SND_SOC_BIAS_OFF) {
250 ret = regcache_sync(max9850->regmap);
251 if (ret) {
252 dev_err(component->dev,
253 "Failed to sync cache: %d\n", ret);
254 return ret;
255 }
256 }
257 break;
258 case SND_SOC_BIAS_OFF:
259 break;
260 }
261 return 0;
262}
263
264#define MAX9850_RATES SNDRV_PCM_RATE_8000_48000
265
266#define MAX9850_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
267 SNDRV_PCM_FMTBIT_S24_LE)
268
269static const struct snd_soc_dai_ops max9850_dai_ops = {
270 .hw_params = max9850_hw_params,
271 .set_sysclk = max9850_set_dai_sysclk,
272 .set_fmt = max9850_set_dai_fmt,
273};
274
275static struct snd_soc_dai_driver max9850_dai = {
276 .name = "max9850-hifi",
277 .playback = {
278 .stream_name = "Playback",
279 .channels_min = 1,
280 .channels_max = 2,
281 .rates = MAX9850_RATES,
282 .formats = MAX9850_FORMATS
283 },
284 .ops = &max9850_dai_ops,
285};
286
287static int max9850_probe(struct snd_soc_component *component)
288{
289
290 snd_soc_component_update_bits(component, MAX9850_GENERAL_PURPOSE, 1, 1);
291
292 snd_soc_component_update_bits(component, MAX9850_VOLUME, 0x40, 0x40);
293
294 snd_soc_component_update_bits(component, MAX9850_CHARGE_PUMP, 0xff, 0xc0);
295
296 return 0;
297}
298
299static const struct snd_soc_component_driver soc_component_dev_max9850 = {
300 .probe = max9850_probe,
301 .set_bias_level = max9850_set_bias_level,
302 .controls = max9850_controls,
303 .num_controls = ARRAY_SIZE(max9850_controls),
304 .dapm_widgets = max9850_dapm_widgets,
305 .num_dapm_widgets = ARRAY_SIZE(max9850_dapm_widgets),
306 .dapm_routes = max9850_dapm_routes,
307 .num_dapm_routes = ARRAY_SIZE(max9850_dapm_routes),
308 .suspend_bias_off = 1,
309 .idle_bias_on = 1,
310 .use_pmdown_time = 1,
311 .endianness = 1,
312 .non_legacy_dai_naming = 1,
313};
314
315static int max9850_i2c_probe(struct i2c_client *i2c,
316 const struct i2c_device_id *id)
317{
318 struct max9850_priv *max9850;
319 int ret;
320
321 max9850 = devm_kzalloc(&i2c->dev, sizeof(struct max9850_priv),
322 GFP_KERNEL);
323 if (max9850 == NULL)
324 return -ENOMEM;
325
326 max9850->regmap = devm_regmap_init_i2c(i2c, &max9850_regmap);
327 if (IS_ERR(max9850->regmap))
328 return PTR_ERR(max9850->regmap);
329
330 i2c_set_clientdata(i2c, max9850);
331
332 ret = devm_snd_soc_register_component(&i2c->dev,
333 &soc_component_dev_max9850, &max9850_dai, 1);
334 return ret;
335}
336
337static const struct i2c_device_id max9850_i2c_id[] = {
338 { "max9850", 0 },
339 { }
340};
341MODULE_DEVICE_TABLE(i2c, max9850_i2c_id);
342
343static struct i2c_driver max9850_i2c_driver = {
344 .driver = {
345 .name = "max9850",
346 },
347 .probe = max9850_i2c_probe,
348 .id_table = max9850_i2c_id,
349};
350
351module_i2c_driver(max9850_i2c_driver);
352
353MODULE_AUTHOR("Christian Glindkamp <christian.glindkamp@taskit.de>");
354MODULE_DESCRIPTION("ASoC MAX9850 codec driver");
355MODULE_LICENSE("GPL");
356
