1 /*
2 * Nuvoton NAU8825 audio codec driver
3 *
4 * Copyright 2015 Google Chromium project.
5 * Author: Anatol Pomozov <anatol@chromium.org>
6 * Copyright 2015 Nuvoton Technology Corp.
7 * Co-author: Meng-Huang Kuo <mhkuo@nuvoton.com>
8 *
9 * Licensed under the GPL-2.
10 */
11
12 #include <linux/module.h>
13 #include <linux/delay.h>
14 #include <linux/init.h>
15 #include <linux/i2c.h>
16 #include <linux/regmap.h>
17 #include <linux/slab.h>
18 #include <linux/clk.h>
19 #include <linux/acpi.h>
20 #include <linux/math64.h>
21
22 #include <sound/initval.h>
23 #include <sound/tlv.h>
24 #include <sound/core.h>
25 #include <sound/pcm.h>
26 #include <sound/pcm_params.h>
27 #include <sound/soc.h>
28 #include <sound/jack.h>
29
30
31 #include "nau8825.h"
32
33 #define NAU_FREF_MAX 13500000
34 #define NAU_FVCO_MAX 100000000
35 #define NAU_FVCO_MIN 90000000
36
37 struct nau8825_fll {
38 int mclk_src;
39 int ratio;
40 int fll_frac;
41 int fll_int;
42 int clk_ref_div;
43 };
44
45 struct nau8825_fll_attr {
46 unsigned int param;
47 unsigned int val;
48 };
49
50 /* scaling for mclk from sysclk_src output */
51 static const struct nau8825_fll_attr mclk_src_scaling[] = {
52 { 1, 0x0 },
53 { 2, 0x2 },
54 { 4, 0x3 },
55 { 8, 0x4 },
56 { 16, 0x5 },
57 { 32, 0x6 },
58 { 3, 0x7 },
59 { 6, 0xa },
60 { 12, 0xb },
61 { 24, 0xc },
62 { 48, 0xd },
63 { 96, 0xe },
64 { 5, 0xf },
65 };
66
67 /* ratio for input clk freq */
68 static const struct nau8825_fll_attr fll_ratio[] = {
69 { 512000, 0x01 },
70 { 256000, 0x02 },
71 { 128000, 0x04 },
72 { 64000, 0x08 },
73 { 32000, 0x10 },
74 { 8000, 0x20 },
75 { 4000, 0x40 },
76 };
77
78 static const struct nau8825_fll_attr fll_pre_scalar[] = {
79 { 1, 0x0 },
80 { 2, 0x1 },
81 { 4, 0x2 },
82 { 8, 0x3 },
83 };
84
85 static const struct reg_default nau8825_reg_defaults[] = {
86 { NAU8825_REG_ENA_CTRL, 0x00ff },
87 { NAU8825_REG_CLK_DIVIDER, 0x0050 },
88 { NAU8825_REG_FLL1, 0x0 },
89 { NAU8825_REG_FLL2, 0x3126 },
90 { NAU8825_REG_FLL3, 0x0008 },
91 { NAU8825_REG_FLL4, 0x0010 },
92 { NAU8825_REG_FLL5, 0x0 },
93 { NAU8825_REG_FLL6, 0x6000 },
94 { NAU8825_REG_FLL_VCO_RSV, 0xf13c },
95 { NAU8825_REG_HSD_CTRL, 0x000c },
96 { NAU8825_REG_JACK_DET_CTRL, 0x0 },
97 { NAU8825_REG_INTERRUPT_MASK, 0x0 },
98 { NAU8825_REG_INTERRUPT_DIS_CTRL, 0xffff },
99 { NAU8825_REG_SAR_CTRL, 0x0015 },
100 { NAU8825_REG_KEYDET_CTRL, 0x0110 },
101 { NAU8825_REG_VDET_THRESHOLD_1, 0x0 },
102 { NAU8825_REG_VDET_THRESHOLD_2, 0x0 },
103 { NAU8825_REG_VDET_THRESHOLD_3, 0x0 },
104 { NAU8825_REG_VDET_THRESHOLD_4, 0x0 },
105 { NAU8825_REG_GPIO34_CTRL, 0x0 },
106 { NAU8825_REG_GPIO12_CTRL, 0x0 },
107 { NAU8825_REG_TDM_CTRL, 0x0 },
108 { NAU8825_REG_I2S_PCM_CTRL1, 0x000b },
109 { NAU8825_REG_I2S_PCM_CTRL2, 0x8010 },
110 { NAU8825_REG_LEFT_TIME_SLOT, 0x0 },
111 { NAU8825_REG_RIGHT_TIME_SLOT, 0x0 },
112 { NAU8825_REG_BIQ_CTRL, 0x0 },
113 { NAU8825_REG_BIQ_COF1, 0x0 },
114 { NAU8825_REG_BIQ_COF2, 0x0 },
115 { NAU8825_REG_BIQ_COF3, 0x0 },
116 { NAU8825_REG_BIQ_COF4, 0x0 },
117 { NAU8825_REG_BIQ_COF5, 0x0 },
118 { NAU8825_REG_BIQ_COF6, 0x0 },
119 { NAU8825_REG_BIQ_COF7, 0x0 },
120 { NAU8825_REG_BIQ_COF8, 0x0 },
121 { NAU8825_REG_BIQ_COF9, 0x0 },
122 { NAU8825_REG_BIQ_COF10, 0x0 },
123 { NAU8825_REG_ADC_RATE, 0x0010 },
124 { NAU8825_REG_DAC_CTRL1, 0x0001 },
125 { NAU8825_REG_DAC_CTRL2, 0x0 },
126 { NAU8825_REG_DAC_DGAIN_CTRL, 0x0 },
127 { NAU8825_REG_ADC_DGAIN_CTRL, 0x00cf },
128 { NAU8825_REG_MUTE_CTRL, 0x0 },
129 { NAU8825_REG_HSVOL_CTRL, 0x0 },
130 { NAU8825_REG_DACL_CTRL, 0x02cf },
131 { NAU8825_REG_DACR_CTRL, 0x00cf },
132 { NAU8825_REG_ADC_DRC_KNEE_IP12, 0x1486 },
133 { NAU8825_REG_ADC_DRC_KNEE_IP34, 0x0f12 },
134 { NAU8825_REG_ADC_DRC_SLOPES, 0x25ff },
135 { NAU8825_REG_ADC_DRC_ATKDCY, 0x3457 },
136 { NAU8825_REG_DAC_DRC_KNEE_IP12, 0x1486 },
137 { NAU8825_REG_DAC_DRC_KNEE_IP34, 0x0f12 },
138 { NAU8825_REG_DAC_DRC_SLOPES, 0x25f9 },
139 { NAU8825_REG_DAC_DRC_ATKDCY, 0x3457 },
140 { NAU8825_REG_IMM_MODE_CTRL, 0x0 },
141 { NAU8825_REG_CLASSG_CTRL, 0x0 },
142 { NAU8825_REG_OPT_EFUSE_CTRL, 0x0 },
143 { NAU8825_REG_MISC_CTRL, 0x0 },
144 { NAU8825_REG_BIAS_ADJ, 0x0 },
145 { NAU8825_REG_TRIM_SETTINGS, 0x0 },
146 { NAU8825_REG_ANALOG_CONTROL_1, 0x0 },
147 { NAU8825_REG_ANALOG_CONTROL_2, 0x0 },
148 { NAU8825_REG_ANALOG_ADC_1, 0x0011 },
149 { NAU8825_REG_ANALOG_ADC_2, 0x0020 },
150 { NAU8825_REG_RDAC, 0x0008 },
151 { NAU8825_REG_MIC_BIAS, 0x0006 },
152 { NAU8825_REG_BOOST, 0x0 },
153 { NAU8825_REG_FEPGA, 0x0 },
154 { NAU8825_REG_POWER_UP_CONTROL, 0x0 },
155 { NAU8825_REG_CHARGE_PUMP, 0x0 },
156 };
157
nau8825_readable_reg(struct device * dev,unsigned int reg)158 static bool nau8825_readable_reg(struct device *dev, unsigned int reg)
159 {
160 switch (reg) {
161 case NAU8825_REG_ENA_CTRL:
162 case NAU8825_REG_CLK_DIVIDER ... NAU8825_REG_FLL_VCO_RSV:
163 case NAU8825_REG_HSD_CTRL ... NAU8825_REG_JACK_DET_CTRL:
164 case NAU8825_REG_INTERRUPT_MASK ... NAU8825_REG_KEYDET_CTRL:
165 case NAU8825_REG_VDET_THRESHOLD_1 ... NAU8825_REG_DACR_CTRL:
166 case NAU8825_REG_ADC_DRC_KNEE_IP12 ... NAU8825_REG_ADC_DRC_ATKDCY:
167 case NAU8825_REG_DAC_DRC_KNEE_IP12 ... NAU8825_REG_DAC_DRC_ATKDCY:
168 case NAU8825_REG_IMM_MODE_CTRL ... NAU8825_REG_IMM_RMS_R:
169 case NAU8825_REG_CLASSG_CTRL ... NAU8825_REG_OPT_EFUSE_CTRL:
170 case NAU8825_REG_MISC_CTRL:
171 case NAU8825_REG_I2C_DEVICE_ID ... NAU8825_REG_SARDOUT_RAM_STATUS:
172 case NAU8825_REG_BIAS_ADJ:
173 case NAU8825_REG_TRIM_SETTINGS ... NAU8825_REG_ANALOG_CONTROL_2:
174 case NAU8825_REG_ANALOG_ADC_1 ... NAU8825_REG_MIC_BIAS:
175 case NAU8825_REG_BOOST ... NAU8825_REG_FEPGA:
176 case NAU8825_REG_POWER_UP_CONTROL ... NAU8825_REG_GENERAL_STATUS:
177 return true;
178 default:
179 return false;
180 }
181
182 }
183
nau8825_writeable_reg(struct device * dev,unsigned int reg)184 static bool nau8825_writeable_reg(struct device *dev, unsigned int reg)
185 {
186 switch (reg) {
187 case NAU8825_REG_RESET ... NAU8825_REG_ENA_CTRL:
188 case NAU8825_REG_CLK_DIVIDER ... NAU8825_REG_FLL_VCO_RSV:
189 case NAU8825_REG_HSD_CTRL ... NAU8825_REG_JACK_DET_CTRL:
190 case NAU8825_REG_INTERRUPT_MASK:
191 case NAU8825_REG_INT_CLR_KEY_STATUS ... NAU8825_REG_KEYDET_CTRL:
192 case NAU8825_REG_VDET_THRESHOLD_1 ... NAU8825_REG_DACR_CTRL:
193 case NAU8825_REG_ADC_DRC_KNEE_IP12 ... NAU8825_REG_ADC_DRC_ATKDCY:
194 case NAU8825_REG_DAC_DRC_KNEE_IP12 ... NAU8825_REG_DAC_DRC_ATKDCY:
195 case NAU8825_REG_IMM_MODE_CTRL:
196 case NAU8825_REG_CLASSG_CTRL ... NAU8825_REG_OPT_EFUSE_CTRL:
197 case NAU8825_REG_MISC_CTRL:
198 case NAU8825_REG_BIAS_ADJ:
199 case NAU8825_REG_TRIM_SETTINGS ... NAU8825_REG_ANALOG_CONTROL_2:
200 case NAU8825_REG_ANALOG_ADC_1 ... NAU8825_REG_MIC_BIAS:
201 case NAU8825_REG_BOOST ... NAU8825_REG_FEPGA:
202 case NAU8825_REG_POWER_UP_CONTROL ... NAU8825_REG_CHARGE_PUMP:
203 return true;
204 default:
205 return false;
206 }
207 }
208
nau8825_volatile_reg(struct device * dev,unsigned int reg)209 static bool nau8825_volatile_reg(struct device *dev, unsigned int reg)
210 {
211 switch (reg) {
212 case NAU8825_REG_RESET:
213 case NAU8825_REG_IRQ_STATUS:
214 case NAU8825_REG_INT_CLR_KEY_STATUS:
215 case NAU8825_REG_IMM_RMS_L:
216 case NAU8825_REG_IMM_RMS_R:
217 case NAU8825_REG_I2C_DEVICE_ID:
218 case NAU8825_REG_SARDOUT_RAM_STATUS:
219 case NAU8825_REG_CHARGE_PUMP_INPUT_READ:
220 case NAU8825_REG_GENERAL_STATUS:
221 return true;
222 default:
223 return false;
224 }
225 }
226
nau8825_pump_event(struct snd_soc_dapm_widget * w,struct snd_kcontrol * kcontrol,int event)227 static int nau8825_pump_event(struct snd_soc_dapm_widget *w,
228 struct snd_kcontrol *kcontrol, int event)
229 {
230 switch (event) {
231 case SND_SOC_DAPM_POST_PMU:
232 /* Prevent startup click by letting charge pump to ramp up */
233 msleep(10);
234 break;
235 default:
236 return -EINVAL;
237 }
238
239 return 0;
240 }
241
242 static const char * const nau8825_adc_decimation[] = {
243 "32", "64", "128", "256"
244 };
245
246 static const struct soc_enum nau8825_adc_decimation_enum =
247 SOC_ENUM_SINGLE(NAU8825_REG_ADC_RATE, NAU8825_ADC_SYNC_DOWN_SFT,
248 ARRAY_SIZE(nau8825_adc_decimation), nau8825_adc_decimation);
249
250 static const char * const nau8825_dac_oversampl[] = {
251 "64", "256", "128", "", "32"
252 };
253
254 static const struct soc_enum nau8825_dac_oversampl_enum =
255 SOC_ENUM_SINGLE(NAU8825_REG_DAC_CTRL1, NAU8825_DAC_OVERSAMPLE_SFT,
256 ARRAY_SIZE(nau8825_dac_oversampl), nau8825_dac_oversampl);
257
258 static const DECLARE_TLV_DB_MINMAX_MUTE(adc_vol_tlv, -10300, 2400);
259 static const DECLARE_TLV_DB_MINMAX_MUTE(sidetone_vol_tlv, -4200, 0);
260 static const DECLARE_TLV_DB_MINMAX(dac_vol_tlv, -5400, 0);
261 static const DECLARE_TLV_DB_MINMAX(fepga_gain_tlv, -100, 3600);
262 static const DECLARE_TLV_DB_MINMAX_MUTE(crosstalk_vol_tlv, -9600, 2400);
263
264 static const struct snd_kcontrol_new nau8825_controls[] = {
265 SOC_SINGLE_TLV("Mic Volume", NAU8825_REG_ADC_DGAIN_CTRL,
266 0, 0xff, 0, adc_vol_tlv),
267 SOC_DOUBLE_TLV("Headphone Bypass Volume", NAU8825_REG_ADC_DGAIN_CTRL,
268 12, 8, 0x0f, 0, sidetone_vol_tlv),
269 SOC_DOUBLE_TLV("Headphone Volume", NAU8825_REG_HSVOL_CTRL,
270 6, 0, 0x3f, 1, dac_vol_tlv),
271 SOC_SINGLE_TLV("Frontend PGA Volume", NAU8825_REG_POWER_UP_CONTROL,
272 8, 37, 0, fepga_gain_tlv),
273 SOC_DOUBLE_TLV("Headphone Crosstalk Volume", NAU8825_REG_DAC_DGAIN_CTRL,
274 0, 8, 0xff, 0, crosstalk_vol_tlv),
275
276 SOC_ENUM("ADC Decimation Rate", nau8825_adc_decimation_enum),
277 SOC_ENUM("DAC Oversampling Rate", nau8825_dac_oversampl_enum),
278 };
279
280 /* DAC Mux 0x33[9] and 0x34[9] */
281 static const char * const nau8825_dac_src[] = {
282 "DACL", "DACR",
283 };
284
285 static SOC_ENUM_SINGLE_DECL(
286 nau8825_dacl_enum, NAU8825_REG_DACL_CTRL,
287 NAU8825_DACL_CH_SEL_SFT, nau8825_dac_src);
288
289 static SOC_ENUM_SINGLE_DECL(
290 nau8825_dacr_enum, NAU8825_REG_DACR_CTRL,
291 NAU8825_DACR_CH_SEL_SFT, nau8825_dac_src);
292
293 static const struct snd_kcontrol_new nau8825_dacl_mux =
294 SOC_DAPM_ENUM("DACL Source", nau8825_dacl_enum);
295
296 static const struct snd_kcontrol_new nau8825_dacr_mux =
297 SOC_DAPM_ENUM("DACR Source", nau8825_dacr_enum);
298
299
300 static const struct snd_soc_dapm_widget nau8825_dapm_widgets[] = {
301 SND_SOC_DAPM_AIF_OUT("AIFTX", "Capture", 0, NAU8825_REG_I2S_PCM_CTRL2,
302 15, 1),
303
304 SND_SOC_DAPM_INPUT("MIC"),
305 SND_SOC_DAPM_MICBIAS("MICBIAS", NAU8825_REG_MIC_BIAS, 8, 0),
306
307 SND_SOC_DAPM_PGA("Frontend PGA", NAU8825_REG_POWER_UP_CONTROL, 14, 0,
308 NULL, 0),
309
310 SND_SOC_DAPM_ADC("ADC", NULL, NAU8825_REG_ENA_CTRL, 8, 0),
311 SND_SOC_DAPM_SUPPLY("ADC Clock", NAU8825_REG_ENA_CTRL, 7, 0, NULL, 0),
312 SND_SOC_DAPM_SUPPLY("ADC Power", NAU8825_REG_ANALOG_ADC_2, 6, 0, NULL,
313 0),
314
315 /* ADC for button press detection */
316 SND_SOC_DAPM_ADC("SAR", NULL, NAU8825_REG_SAR_CTRL,
317 NAU8825_SAR_ADC_EN_SFT, 0),
318
319 SND_SOC_DAPM_DAC("ADACL", NULL, NAU8825_REG_RDAC, 12, 0),
320 SND_SOC_DAPM_DAC("ADACR", NULL, NAU8825_REG_RDAC, 13, 0),
321 SND_SOC_DAPM_SUPPLY("ADACL Clock", NAU8825_REG_RDAC, 8, 0, NULL, 0),
322 SND_SOC_DAPM_SUPPLY("ADACR Clock", NAU8825_REG_RDAC, 9, 0, NULL, 0),
323
324 SND_SOC_DAPM_DAC("DDACR", NULL, NAU8825_REG_ENA_CTRL,
325 NAU8825_ENABLE_DACR_SFT, 0),
326 SND_SOC_DAPM_DAC("DDACL", NULL, NAU8825_REG_ENA_CTRL,
327 NAU8825_ENABLE_DACL_SFT, 0),
328 SND_SOC_DAPM_SUPPLY("DDAC Clock", NAU8825_REG_ENA_CTRL, 6, 0, NULL, 0),
329
330 SND_SOC_DAPM_MUX("DACL Mux", SND_SOC_NOPM, 0, 0, &nau8825_dacl_mux),
331 SND_SOC_DAPM_MUX("DACR Mux", SND_SOC_NOPM, 0, 0, &nau8825_dacr_mux),
332
333 SND_SOC_DAPM_PGA("HP amp L", NAU8825_REG_CLASSG_CTRL, 1, 0, NULL, 0),
334 SND_SOC_DAPM_PGA("HP amp R", NAU8825_REG_CLASSG_CTRL, 2, 0, NULL, 0),
335 SND_SOC_DAPM_SUPPLY("HP amp power", NAU8825_REG_CLASSG_CTRL, 0, 0, NULL,
336 0),
337
338 SND_SOC_DAPM_SUPPLY("Charge Pump", NAU8825_REG_CHARGE_PUMP, 5, 0,
339 nau8825_pump_event, SND_SOC_DAPM_POST_PMU),
340
341 SND_SOC_DAPM_PGA("Output Driver R Stage 1",
342 NAU8825_REG_POWER_UP_CONTROL, 5, 0, NULL, 0),
343 SND_SOC_DAPM_PGA("Output Driver L Stage 1",
344 NAU8825_REG_POWER_UP_CONTROL, 4, 0, NULL, 0),
345 SND_SOC_DAPM_PGA("Output Driver R Stage 2",
346 NAU8825_REG_POWER_UP_CONTROL, 3, 0, NULL, 0),
347 SND_SOC_DAPM_PGA("Output Driver L Stage 2",
348 NAU8825_REG_POWER_UP_CONTROL, 2, 0, NULL, 0),
349 SND_SOC_DAPM_PGA_S("Output Driver R Stage 3", 1,
350 NAU8825_REG_POWER_UP_CONTROL, 1, 0, NULL, 0),
351 SND_SOC_DAPM_PGA_S("Output Driver L Stage 3", 1,
352 NAU8825_REG_POWER_UP_CONTROL, 0, 0, NULL, 0),
353
354 SND_SOC_DAPM_PGA_S("Output DACL", 2, NAU8825_REG_CHARGE_PUMP, 8, 1, NULL, 0),
355 SND_SOC_DAPM_PGA_S("Output DACR", 2, NAU8825_REG_CHARGE_PUMP, 9, 1, NULL, 0),
356
357 SND_SOC_DAPM_OUTPUT("HPOL"),
358 SND_SOC_DAPM_OUTPUT("HPOR"),
359 };
360
361 static const struct snd_soc_dapm_route nau8825_dapm_routes[] = {
362 {"Frontend PGA", NULL, "MIC"},
363 {"ADC", NULL, "Frontend PGA"},
364 {"ADC", NULL, "ADC Clock"},
365 {"ADC", NULL, "ADC Power"},
366 {"AIFTX", NULL, "ADC"},
367
368 {"DDACL", NULL, "Playback"},
369 {"DDACR", NULL, "Playback"},
370 {"DDACL", NULL, "DDAC Clock"},
371 {"DDACR", NULL, "DDAC Clock"},
372 {"DACL Mux", "DACL", "DDACL"},
373 {"DACL Mux", "DACR", "DDACR"},
374 {"DACR Mux", "DACL", "DDACL"},
375 {"DACR Mux", "DACR", "DDACR"},
376 {"HP amp L", NULL, "DACL Mux"},
377 {"HP amp R", NULL, "DACR Mux"},
378 {"HP amp L", NULL, "HP amp power"},
379 {"HP amp R", NULL, "HP amp power"},
380 {"ADACL", NULL, "HP amp L"},
381 {"ADACR", NULL, "HP amp R"},
382 {"ADACL", NULL, "ADACL Clock"},
383 {"ADACR", NULL, "ADACR Clock"},
384 {"Output Driver L Stage 1", NULL, "ADACL"},
385 {"Output Driver R Stage 1", NULL, "ADACR"},
386 {"Output Driver L Stage 2", NULL, "Output Driver L Stage 1"},
387 {"Output Driver R Stage 2", NULL, "Output Driver R Stage 1"},
388 {"Output Driver L Stage 3", NULL, "Output Driver L Stage 2"},
389 {"Output Driver R Stage 3", NULL, "Output Driver R Stage 2"},
390 {"Output DACL", NULL, "Output Driver L Stage 3"},
391 {"Output DACR", NULL, "Output Driver R Stage 3"},
392 {"HPOL", NULL, "Output DACL"},
393 {"HPOR", NULL, "Output DACR"},
394 {"HPOL", NULL, "Charge Pump"},
395 {"HPOR", NULL, "Charge Pump"},
396 };
397
nau8825_hw_params(struct snd_pcm_substream * substream,struct snd_pcm_hw_params * params,struct snd_soc_dai * dai)398 static int nau8825_hw_params(struct snd_pcm_substream *substream,
399 struct snd_pcm_hw_params *params,
400 struct snd_soc_dai *dai)
401 {
402 struct snd_soc_codec *codec = dai->codec;
403 struct nau8825 *nau8825 = snd_soc_codec_get_drvdata(codec);
404 unsigned int val_len = 0;
405
406 switch (params_width(params)) {
407 case 16:
408 val_len |= NAU8825_I2S_DL_16;
409 break;
410 case 20:
411 val_len |= NAU8825_I2S_DL_20;
412 break;
413 case 24:
414 val_len |= NAU8825_I2S_DL_24;
415 break;
416 case 32:
417 val_len |= NAU8825_I2S_DL_32;
418 break;
419 default:
420 return -EINVAL;
421 }
422
423 regmap_update_bits(nau8825->regmap, NAU8825_REG_I2S_PCM_CTRL1,
424 NAU8825_I2S_DL_MASK, val_len);
425
426 return 0;
427 }
428
nau8825_set_dai_fmt(struct snd_soc_dai * codec_dai,unsigned int fmt)429 static int nau8825_set_dai_fmt(struct snd_soc_dai *codec_dai, unsigned int fmt)
430 {
431 struct snd_soc_codec *codec = codec_dai->codec;
432 struct nau8825 *nau8825 = snd_soc_codec_get_drvdata(codec);
433 unsigned int ctrl1_val = 0, ctrl2_val = 0;
434
435 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
436 case SND_SOC_DAIFMT_CBM_CFM:
437 ctrl2_val |= NAU8825_I2S_MS_MASTER;
438 break;
439 case SND_SOC_DAIFMT_CBS_CFS:
440 break;
441 default:
442 return -EINVAL;
443 }
444
445 switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
446 case SND_SOC_DAIFMT_NB_NF:
447 break;
448 case SND_SOC_DAIFMT_IB_NF:
449 ctrl1_val |= NAU8825_I2S_BP_INV;
450 break;
451 default:
452 return -EINVAL;
453 }
454
455 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
456 case SND_SOC_DAIFMT_I2S:
457 ctrl1_val |= NAU8825_I2S_DF_I2S;
458 break;
459 case SND_SOC_DAIFMT_LEFT_J:
460 ctrl1_val |= NAU8825_I2S_DF_LEFT;
461 break;
462 case SND_SOC_DAIFMT_RIGHT_J:
463 ctrl1_val |= NAU8825_I2S_DF_RIGTH;
464 break;
465 case SND_SOC_DAIFMT_DSP_A:
466 ctrl1_val |= NAU8825_I2S_DF_PCM_AB;
467 break;
468 case SND_SOC_DAIFMT_DSP_B:
469 ctrl1_val |= NAU8825_I2S_DF_PCM_AB;
470 ctrl1_val |= NAU8825_I2S_PCMB_EN;
471 break;
472 default:
473 return -EINVAL;
474 }
475
476 regmap_update_bits(nau8825->regmap, NAU8825_REG_I2S_PCM_CTRL1,
477 NAU8825_I2S_DL_MASK | NAU8825_I2S_DF_MASK |
478 NAU8825_I2S_BP_MASK | NAU8825_I2S_PCMB_MASK,
479 ctrl1_val);
480 regmap_update_bits(nau8825->regmap, NAU8825_REG_I2S_PCM_CTRL2,
481 NAU8825_I2S_MS_MASK, ctrl2_val);
482
483 return 0;
484 }
485
486 static const struct snd_soc_dai_ops nau8825_dai_ops = {
487 .hw_params = nau8825_hw_params,
488 .set_fmt = nau8825_set_dai_fmt,
489 };
490
491 #define NAU8825_RATES SNDRV_PCM_RATE_8000_192000
492 #define NAU8825_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE \
493 | SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_S32_LE)
494
495 static struct snd_soc_dai_driver nau8825_dai = {
496 .name = "nau8825-hifi",
497 .playback = {
498 .stream_name = "Playback",
499 .channels_min = 1,
500 .channels_max = 2,
501 .rates = NAU8825_RATES,
502 .formats = NAU8825_FORMATS,
503 },
504 .capture = {
505 .stream_name = "Capture",
506 .channels_min = 1,
507 .channels_max = 1,
508 .rates = NAU8825_RATES,
509 .formats = NAU8825_FORMATS,
510 },
511 .ops = &nau8825_dai_ops,
512 };
513
514 /**
515 * nau8825_enable_jack_detect - Specify a jack for event reporting
516 *
517 * @component: component to register the jack with
518 * @jack: jack to use to report headset and button events on
519 *
520 * After this function has been called the headset insert/remove and button
521 * events will be routed to the given jack. Jack can be null to stop
522 * reporting.
523 */
nau8825_enable_jack_detect(struct snd_soc_codec * codec,struct snd_soc_jack * jack)524 int nau8825_enable_jack_detect(struct snd_soc_codec *codec,
525 struct snd_soc_jack *jack)
526 {
527 struct nau8825 *nau8825 = snd_soc_codec_get_drvdata(codec);
528 struct regmap *regmap = nau8825->regmap;
529
530 nau8825->jack = jack;
531
532 /* Ground HP Outputs[1:0], needed for headset auto detection
533 * Enable Automatic Mic/Gnd switching reading on insert interrupt[6]
534 */
535 regmap_update_bits(regmap, NAU8825_REG_HSD_CTRL,
536 NAU8825_HSD_AUTO_MODE | NAU8825_SPKR_DWN1R | NAU8825_SPKR_DWN1L,
537 NAU8825_HSD_AUTO_MODE | NAU8825_SPKR_DWN1R | NAU8825_SPKR_DWN1L);
538
539 regmap_update_bits(regmap, NAU8825_REG_INTERRUPT_MASK,
540 NAU8825_IRQ_HEADSET_COMPLETE_EN | NAU8825_IRQ_EJECT_EN, 0);
541
542 return 0;
543 }
544 EXPORT_SYMBOL_GPL(nau8825_enable_jack_detect);
545
546
nau8825_is_jack_inserted(struct regmap * regmap)547 static bool nau8825_is_jack_inserted(struct regmap *regmap)
548 {
549 int status;
550
551 regmap_read(regmap, NAU8825_REG_I2C_DEVICE_ID, &status);
552 return !(status & NAU8825_GPIO2JD1);
553 }
554
nau8825_restart_jack_detection(struct regmap * regmap)555 static void nau8825_restart_jack_detection(struct regmap *regmap)
556 {
557 /* this will restart the entire jack detection process including MIC/GND
558 * switching and create interrupts. We have to go from 0 to 1 and back
559 * to 0 to restart.
560 */
561 regmap_update_bits(regmap, NAU8825_REG_JACK_DET_CTRL,
562 NAU8825_JACK_DET_RESTART, NAU8825_JACK_DET_RESTART);
563 regmap_update_bits(regmap, NAU8825_REG_JACK_DET_CTRL,
564 NAU8825_JACK_DET_RESTART, 0);
565 }
566
nau8825_eject_jack(struct nau8825 * nau8825)567 static void nau8825_eject_jack(struct nau8825 *nau8825)
568 {
569 struct snd_soc_dapm_context *dapm = nau8825->dapm;
570 struct regmap *regmap = nau8825->regmap;
571
572 snd_soc_dapm_disable_pin(dapm, "SAR");
573 snd_soc_dapm_disable_pin(dapm, "MICBIAS");
574 /* Detach 2kOhm Resistors from MICBIAS to MICGND1/2 */
575 regmap_update_bits(regmap, NAU8825_REG_MIC_BIAS,
576 NAU8825_MICBIAS_JKSLV | NAU8825_MICBIAS_JKR2, 0);
577 /* ground HPL/HPR, MICGRND1/2 */
578 regmap_update_bits(regmap, NAU8825_REG_HSD_CTRL, 0xf, 0xf);
579
580 snd_soc_dapm_sync(dapm);
581 }
582
nau8825_button_decode(int value)583 static int nau8825_button_decode(int value)
584 {
585 int buttons = 0;
586
587 /* The chip supports up to 8 buttons, but ALSA defines only 6 buttons */
588 if (value & BIT(0))
589 buttons |= SND_JACK_BTN_0;
590 if (value & BIT(1))
591 buttons |= SND_JACK_BTN_1;
592 if (value & BIT(2))
593 buttons |= SND_JACK_BTN_2;
594 if (value & BIT(3))
595 buttons |= SND_JACK_BTN_3;
596 if (value & BIT(4))
597 buttons |= SND_JACK_BTN_4;
598 if (value & BIT(5))
599 buttons |= SND_JACK_BTN_5;
600
601 return buttons;
602 }
603
nau8825_jack_insert(struct nau8825 * nau8825)604 static int nau8825_jack_insert(struct nau8825 *nau8825)
605 {
606 struct regmap *regmap = nau8825->regmap;
607 struct snd_soc_dapm_context *dapm = nau8825->dapm;
608 int jack_status_reg, mic_detected;
609 int type = 0;
610
611 regmap_read(regmap, NAU8825_REG_GENERAL_STATUS, &jack_status_reg);
612 mic_detected = (jack_status_reg >> 10) & 3;
613
614 switch (mic_detected) {
615 case 0:
616 /* no mic */
617 type = SND_JACK_HEADPHONE;
618 break;
619 case 1:
620 dev_dbg(nau8825->dev, "OMTP (micgnd1) mic connected\n");
621 type = SND_JACK_HEADSET;
622
623 /* Unground MICGND1 */
624 regmap_update_bits(regmap, NAU8825_REG_HSD_CTRL, 3 << 2,
625 1 << 2);
626 /* Attach 2kOhm Resistor from MICBIAS to MICGND1 */
627 regmap_update_bits(regmap, NAU8825_REG_MIC_BIAS,
628 NAU8825_MICBIAS_JKSLV | NAU8825_MICBIAS_JKR2,
629 NAU8825_MICBIAS_JKR2);
630 /* Attach SARADC to MICGND1 */
631 regmap_update_bits(regmap, NAU8825_REG_SAR_CTRL,
632 NAU8825_SAR_INPUT_MASK,
633 NAU8825_SAR_INPUT_JKR2);
634
635 snd_soc_dapm_force_enable_pin(dapm, "MICBIAS");
636 snd_soc_dapm_force_enable_pin(dapm, "SAR");
637 snd_soc_dapm_sync(dapm);
638 break;
639 case 2:
640 case 3:
641 dev_dbg(nau8825->dev, "CTIA (micgnd2) mic connected\n");
642 type = SND_JACK_HEADSET;
643
644 /* Unground MICGND2 */
645 regmap_update_bits(regmap, NAU8825_REG_HSD_CTRL, 3 << 2,
646 2 << 2);
647 /* Attach 2kOhm Resistor from MICBIAS to MICGND2 */
648 regmap_update_bits(regmap, NAU8825_REG_MIC_BIAS,
649 NAU8825_MICBIAS_JKSLV | NAU8825_MICBIAS_JKR2,
650 NAU8825_MICBIAS_JKSLV);
651 /* Attach SARADC to MICGND2 */
652 regmap_update_bits(regmap, NAU8825_REG_SAR_CTRL,
653 NAU8825_SAR_INPUT_MASK,
654 NAU8825_SAR_INPUT_JKSLV);
655
656 snd_soc_dapm_force_enable_pin(dapm, "MICBIAS");
657 snd_soc_dapm_force_enable_pin(dapm, "SAR");
658 snd_soc_dapm_sync(dapm);
659 break;
660 }
661
662 if (type & SND_JACK_HEADPHONE) {
663 /* Unground HPL/R */
664 regmap_update_bits(regmap, NAU8825_REG_HSD_CTRL, 0x3, 0);
665 }
666
667 return type;
668 }
669
670 #define NAU8825_BUTTONS (SND_JACK_BTN_0 | SND_JACK_BTN_1 | \
671 SND_JACK_BTN_2 | SND_JACK_BTN_3)
672
nau8825_interrupt(int irq,void * data)673 static irqreturn_t nau8825_interrupt(int irq, void *data)
674 {
675 struct nau8825 *nau8825 = (struct nau8825 *)data;
676 struct regmap *regmap = nau8825->regmap;
677 int active_irq, clear_irq = 0, event = 0, event_mask = 0;
678
679 regmap_read(regmap, NAU8825_REG_IRQ_STATUS, &active_irq);
680
681 if ((active_irq & NAU8825_JACK_EJECTION_IRQ_MASK) ==
682 NAU8825_JACK_EJECTION_DETECTED) {
683
684 nau8825_eject_jack(nau8825);
685 event_mask |= SND_JACK_HEADSET;
686 clear_irq = NAU8825_JACK_EJECTION_IRQ_MASK;
687 } else if (active_irq & NAU8825_KEY_SHORT_PRESS_IRQ) {
688 int key_status;
689
690 regmap_read(regmap, NAU8825_REG_INT_CLR_KEY_STATUS,
691 &key_status);
692
693 /* upper 8 bits of the register are for short pressed keys,
694 * lower 8 bits - for long pressed buttons
695 */
696 nau8825->button_pressed = nau8825_button_decode(
697 key_status >> 8);
698
699 event |= nau8825->button_pressed;
700 event_mask |= NAU8825_BUTTONS;
701 clear_irq = NAU8825_KEY_SHORT_PRESS_IRQ;
702 } else if (active_irq & NAU8825_KEY_RELEASE_IRQ) {
703 event_mask = NAU8825_BUTTONS;
704 clear_irq = NAU8825_KEY_RELEASE_IRQ;
705 } else if (active_irq & NAU8825_HEADSET_COMPLETION_IRQ) {
706 if (nau8825_is_jack_inserted(regmap)) {
707 event |= nau8825_jack_insert(nau8825);
708 } else {
709 dev_warn(nau8825->dev, "Headset completion IRQ fired but no headset connected\n");
710 nau8825_eject_jack(nau8825);
711 }
712
713 event_mask |= SND_JACK_HEADSET;
714 clear_irq = NAU8825_HEADSET_COMPLETION_IRQ;
715 }
716
717 if (!clear_irq)
718 clear_irq = active_irq;
719 /* clears the rightmost interruption */
720 regmap_write(regmap, NAU8825_REG_INT_CLR_KEY_STATUS, clear_irq);
721
722 if (event_mask)
723 snd_soc_jack_report(nau8825->jack, event, event_mask);
724
725 return IRQ_HANDLED;
726 }
727
nau8825_setup_buttons(struct nau8825 * nau8825)728 static void nau8825_setup_buttons(struct nau8825 *nau8825)
729 {
730 struct regmap *regmap = nau8825->regmap;
731
732 regmap_update_bits(regmap, NAU8825_REG_SAR_CTRL,
733 NAU8825_SAR_TRACKING_GAIN_MASK,
734 nau8825->sar_voltage << NAU8825_SAR_TRACKING_GAIN_SFT);
735 regmap_update_bits(regmap, NAU8825_REG_SAR_CTRL,
736 NAU8825_SAR_COMPARE_TIME_MASK,
737 nau8825->sar_compare_time << NAU8825_SAR_COMPARE_TIME_SFT);
738 regmap_update_bits(regmap, NAU8825_REG_SAR_CTRL,
739 NAU8825_SAR_SAMPLING_TIME_MASK,
740 nau8825->sar_sampling_time << NAU8825_SAR_SAMPLING_TIME_SFT);
741
742 regmap_update_bits(regmap, NAU8825_REG_KEYDET_CTRL,
743 NAU8825_KEYDET_LEVELS_NR_MASK,
744 (nau8825->sar_threshold_num - 1) << NAU8825_KEYDET_LEVELS_NR_SFT);
745 regmap_update_bits(regmap, NAU8825_REG_KEYDET_CTRL,
746 NAU8825_KEYDET_HYSTERESIS_MASK,
747 nau8825->sar_hysteresis << NAU8825_KEYDET_HYSTERESIS_SFT);
748 regmap_update_bits(regmap, NAU8825_REG_KEYDET_CTRL,
749 NAU8825_KEYDET_SHORTKEY_DEBOUNCE_MASK,
750 nau8825->key_debounce << NAU8825_KEYDET_SHORTKEY_DEBOUNCE_SFT);
751
752 regmap_write(regmap, NAU8825_REG_VDET_THRESHOLD_1,
753 (nau8825->sar_threshold[0] << 8) | nau8825->sar_threshold[1]);
754 regmap_write(regmap, NAU8825_REG_VDET_THRESHOLD_2,
755 (nau8825->sar_threshold[2] << 8) | nau8825->sar_threshold[3]);
756 regmap_write(regmap, NAU8825_REG_VDET_THRESHOLD_3,
757 (nau8825->sar_threshold[4] << 8) | nau8825->sar_threshold[5]);
758 regmap_write(regmap, NAU8825_REG_VDET_THRESHOLD_4,
759 (nau8825->sar_threshold[6] << 8) | nau8825->sar_threshold[7]);
760
761 /* Enable short press and release interruptions */
762 regmap_update_bits(regmap, NAU8825_REG_INTERRUPT_MASK,
763 NAU8825_IRQ_KEY_SHORT_PRESS_EN | NAU8825_IRQ_KEY_RELEASE_EN,
764 0);
765 }
766
nau8825_init_regs(struct nau8825 * nau8825)767 static void nau8825_init_regs(struct nau8825 *nau8825)
768 {
769 struct regmap *regmap = nau8825->regmap;
770
771 /* Enable Bias/Vmid */
772 regmap_update_bits(nau8825->regmap, NAU8825_REG_BIAS_ADJ,
773 NAU8825_BIAS_VMID, NAU8825_BIAS_VMID);
774 regmap_update_bits(nau8825->regmap, NAU8825_REG_BOOST,
775 NAU8825_GLOBAL_BIAS_EN, NAU8825_GLOBAL_BIAS_EN);
776
777 /* VMID Tieoff */
778 regmap_update_bits(regmap, NAU8825_REG_BIAS_ADJ,
779 NAU8825_BIAS_VMID_SEL_MASK,
780 nau8825->vref_impedance << NAU8825_BIAS_VMID_SEL_SFT);
781 /* Disable Boost Driver, Automatic Short circuit protection enable */
782 regmap_update_bits(regmap, NAU8825_REG_BOOST,
783 NAU8825_PRECHARGE_DIS | NAU8825_HP_BOOST_G_DIS |
784 NAU8825_SHORT_SHUTDOWN_EN,
785 NAU8825_PRECHARGE_DIS | NAU8825_HP_BOOST_G_DIS |
786 NAU8825_SHORT_SHUTDOWN_EN);
787
788 regmap_update_bits(regmap, NAU8825_REG_GPIO12_CTRL,
789 NAU8825_JKDET_OUTPUT_EN,
790 nau8825->jkdet_enable ? 0 : NAU8825_JKDET_OUTPUT_EN);
791 regmap_update_bits(regmap, NAU8825_REG_GPIO12_CTRL,
792 NAU8825_JKDET_PULL_EN,
793 nau8825->jkdet_pull_enable ? 0 : NAU8825_JKDET_PULL_EN);
794 regmap_update_bits(regmap, NAU8825_REG_GPIO12_CTRL,
795 NAU8825_JKDET_PULL_UP,
796 nau8825->jkdet_pull_up ? NAU8825_JKDET_PULL_UP : 0);
797 regmap_update_bits(regmap, NAU8825_REG_JACK_DET_CTRL,
798 NAU8825_JACK_POLARITY,
799 /* jkdet_polarity - 1 is for active-low */
800 nau8825->jkdet_polarity ? 0 : NAU8825_JACK_POLARITY);
801
802 regmap_update_bits(regmap, NAU8825_REG_JACK_DET_CTRL,
803 NAU8825_JACK_INSERT_DEBOUNCE_MASK,
804 nau8825->jack_insert_debounce << NAU8825_JACK_INSERT_DEBOUNCE_SFT);
805 regmap_update_bits(regmap, NAU8825_REG_JACK_DET_CTRL,
806 NAU8825_JACK_EJECT_DEBOUNCE_MASK,
807 nau8825->jack_eject_debounce << NAU8825_JACK_EJECT_DEBOUNCE_SFT);
808
809 /* Mask unneeded IRQs: 1 - disable, 0 - enable */
810 regmap_update_bits(regmap, NAU8825_REG_INTERRUPT_MASK, 0x7ff, 0x7ff);
811
812 regmap_update_bits(regmap, NAU8825_REG_MIC_BIAS,
813 NAU8825_MICBIAS_VOLTAGE_MASK, nau8825->micbias_voltage);
814
815 if (nau8825->sar_threshold_num)
816 nau8825_setup_buttons(nau8825);
817
818 /* Default oversampling/decimations settings are unusable
819 * (audible hiss). Set it to something better.
820 */
821 regmap_update_bits(regmap, NAU8825_REG_ADC_RATE,
822 NAU8825_ADC_SYNC_DOWN_MASK, NAU8825_ADC_SYNC_DOWN_128);
823 regmap_update_bits(regmap, NAU8825_REG_DAC_CTRL1,
824 NAU8825_DAC_OVERSAMPLE_MASK, NAU8825_DAC_OVERSAMPLE_128);
825 }
826
827 static const struct regmap_config nau8825_regmap_config = {
828 .val_bits = 16,
829 .reg_bits = 16,
830
831 .max_register = NAU8825_REG_MAX,
832 .readable_reg = nau8825_readable_reg,
833 .writeable_reg = nau8825_writeable_reg,
834 .volatile_reg = nau8825_volatile_reg,
835
836 .cache_type = REGCACHE_RBTREE,
837 .reg_defaults = nau8825_reg_defaults,
838 .num_reg_defaults = ARRAY_SIZE(nau8825_reg_defaults),
839 };
840
nau8825_codec_probe(struct snd_soc_codec * codec)841 static int nau8825_codec_probe(struct snd_soc_codec *codec)
842 {
843 struct nau8825 *nau8825 = snd_soc_codec_get_drvdata(codec);
844 struct snd_soc_dapm_context *dapm = snd_soc_codec_get_dapm(codec);
845
846 nau8825->dapm = dapm;
847
848 /* The interrupt clock is gated by x1[10:8],
849 * one of them needs to be enabled all the time for
850 * interrupts to happen.
851 */
852 snd_soc_dapm_force_enable_pin(dapm, "DDACR");
853 snd_soc_dapm_sync(dapm);
854
855 /* Unmask interruptions. Handler uses dapm object so we can enable
856 * interruptions only after dapm is fully initialized.
857 */
858 regmap_write(nau8825->regmap, NAU8825_REG_INTERRUPT_DIS_CTRL, 0);
859 nau8825_restart_jack_detection(nau8825->regmap);
860
861 return 0;
862 }
863
864 /**
865 * nau8825_calc_fll_param - Calculate FLL parameters.
866 * @fll_in: external clock provided to codec.
867 * @fs: sampling rate.
868 * @fll_param: Pointer to structure of FLL parameters.
869 *
870 * Calculate FLL parameters to configure codec.
871 *
872 * Returns 0 for success or negative error code.
873 */
nau8825_calc_fll_param(unsigned int fll_in,unsigned int fs,struct nau8825_fll * fll_param)874 static int nau8825_calc_fll_param(unsigned int fll_in, unsigned int fs,
875 struct nau8825_fll *fll_param)
876 {
877 u64 fvco;
878 unsigned int fref, i;
879
880 /* Ensure the reference clock frequency (FREF) is <= 13.5MHz by dividing
881 * freq_in by 1, 2, 4, or 8 using FLL pre-scalar.
882 * FREF = freq_in / NAU8825_FLL_REF_DIV_MASK
883 */
884 for (i = 0; i < ARRAY_SIZE(fll_pre_scalar); i++) {
885 fref = fll_in / fll_pre_scalar[i].param;
886 if (fref <= NAU_FREF_MAX)
887 break;
888 }
889 if (i == ARRAY_SIZE(fll_pre_scalar))
890 return -EINVAL;
891 fll_param->clk_ref_div = fll_pre_scalar[i].val;
892
893 /* Choose the FLL ratio based on FREF */
894 for (i = 0; i < ARRAY_SIZE(fll_ratio); i++) {
895 if (fref >= fll_ratio[i].param)
896 break;
897 }
898 if (i == ARRAY_SIZE(fll_ratio))
899 return -EINVAL;
900 fll_param->ratio = fll_ratio[i].val;
901
902 /* Calculate the frequency of DCO (FDCO) given freq_out = 256 * Fs.
903 * FDCO must be within the 90MHz - 100MHz or the FFL cannot be
904 * guaranteed across the full range of operation.
905 * FDCO = freq_out * 2 * mclk_src_scaling
906 */
907 for (i = 0; i < ARRAY_SIZE(mclk_src_scaling); i++) {
908 fvco = 256 * fs * 2 * mclk_src_scaling[i].param;
909 if (NAU_FVCO_MIN < fvco && fvco < NAU_FVCO_MAX)
910 break;
911 }
912 if (i == ARRAY_SIZE(mclk_src_scaling))
913 return -EINVAL;
914 fll_param->mclk_src = mclk_src_scaling[i].val;
915
916 /* Calculate the FLL 10-bit integer input and the FLL 16-bit fractional
917 * input based on FDCO, FREF and FLL ratio.
918 */
919 fvco = div_u64(fvco << 16, fref * fll_param->ratio);
920 fll_param->fll_int = (fvco >> 16) & 0x3FF;
921 fll_param->fll_frac = fvco & 0xFFFF;
922 return 0;
923 }
924
nau8825_fll_apply(struct nau8825 * nau8825,struct nau8825_fll * fll_param)925 static void nau8825_fll_apply(struct nau8825 *nau8825,
926 struct nau8825_fll *fll_param)
927 {
928 regmap_update_bits(nau8825->regmap, NAU8825_REG_CLK_DIVIDER,
929 NAU8825_CLK_MCLK_SRC_MASK, fll_param->mclk_src);
930 regmap_update_bits(nau8825->regmap, NAU8825_REG_FLL1,
931 NAU8825_FLL_RATIO_MASK, fll_param->ratio);
932 /* FLL 16-bit fractional input */
933 regmap_write(nau8825->regmap, NAU8825_REG_FLL2, fll_param->fll_frac);
934 /* FLL 10-bit integer input */
935 regmap_update_bits(nau8825->regmap, NAU8825_REG_FLL3,
936 NAU8825_FLL_INTEGER_MASK, fll_param->fll_int);
937 /* FLL pre-scaler */
938 regmap_update_bits(nau8825->regmap, NAU8825_REG_FLL4,
939 NAU8825_FLL_REF_DIV_MASK,
940 fll_param->clk_ref_div << NAU8825_FLL_REF_DIV_SFT);
941 /* select divided VCO input */
942 regmap_update_bits(nau8825->regmap, NAU8825_REG_FLL5,
943 NAU8825_FLL_FILTER_SW_MASK, 0x0000);
944 /* FLL sigma delta modulator enable */
945 regmap_update_bits(nau8825->regmap, NAU8825_REG_FLL6,
946 NAU8825_SDM_EN_MASK, NAU8825_SDM_EN);
947 }
948
949 /* freq_out must be 256*Fs in order to achieve the best performance */
nau8825_set_pll(struct snd_soc_codec * codec,int pll_id,int source,unsigned int freq_in,unsigned int freq_out)950 static int nau8825_set_pll(struct snd_soc_codec *codec, int pll_id, int source,
951 unsigned int freq_in, unsigned int freq_out)
952 {
953 struct nau8825 *nau8825 = snd_soc_codec_get_drvdata(codec);
954 struct nau8825_fll fll_param;
955 int ret, fs;
956
957 fs = freq_out / 256;
958 ret = nau8825_calc_fll_param(freq_in, fs, &fll_param);
959 if (ret < 0) {
960 dev_err(codec->dev, "Unsupported input clock %d\n", freq_in);
961 return ret;
962 }
963 dev_dbg(codec->dev, "mclk_src=%x ratio=%x fll_frac=%x fll_int=%x clk_ref_div=%x\n",
964 fll_param.mclk_src, fll_param.ratio, fll_param.fll_frac,
965 fll_param.fll_int, fll_param.clk_ref_div);
966
967 nau8825_fll_apply(nau8825, &fll_param);
968 mdelay(2);
969 regmap_update_bits(nau8825->regmap, NAU8825_REG_CLK_DIVIDER,
970 NAU8825_CLK_SRC_MASK, NAU8825_CLK_SRC_VCO);
971 return 0;
972 }
973
nau8825_configure_sysclk(struct nau8825 * nau8825,int clk_id,unsigned int freq)974 static int nau8825_configure_sysclk(struct nau8825 *nau8825, int clk_id,
975 unsigned int freq)
976 {
977 struct regmap *regmap = nau8825->regmap;
978 int ret;
979
980 switch (clk_id) {
981 case NAU8825_CLK_MCLK:
982 regmap_update_bits(regmap, NAU8825_REG_CLK_DIVIDER,
983 NAU8825_CLK_SRC_MASK, NAU8825_CLK_SRC_MCLK);
984 regmap_update_bits(regmap, NAU8825_REG_FLL6, NAU8825_DCO_EN, 0);
985
986 /* We selected MCLK source but the clock itself managed externally */
987 if (!nau8825->mclk)
988 break;
989
990 if (!nau8825->mclk_freq) {
991 ret = clk_prepare_enable(nau8825->mclk);
992 if (ret) {
993 dev_err(nau8825->dev, "Unable to prepare codec mclk\n");
994 return ret;
995 }
996 }
997
998 if (nau8825->mclk_freq != freq) {
999 nau8825->mclk_freq = freq;
1000
1001 freq = clk_round_rate(nau8825->mclk, freq);
1002 ret = clk_set_rate(nau8825->mclk, freq);
1003 if (ret) {
1004 dev_err(nau8825->dev, "Unable to set mclk rate\n");
1005 return ret;
1006 }
1007 }
1008
1009 break;
1010 case NAU8825_CLK_INTERNAL:
1011 regmap_update_bits(regmap, NAU8825_REG_FLL6, NAU8825_DCO_EN,
1012 NAU8825_DCO_EN);
1013 regmap_update_bits(regmap, NAU8825_REG_CLK_DIVIDER,
1014 NAU8825_CLK_SRC_MASK, NAU8825_CLK_SRC_VCO);
1015
1016 if (nau8825->mclk_freq) {
1017 clk_disable_unprepare(nau8825->mclk);
1018 nau8825->mclk_freq = 0;
1019 }
1020
1021 break;
1022 default:
1023 dev_err(nau8825->dev, "Invalid clock id (%d)\n", clk_id);
1024 return -EINVAL;
1025 }
1026
1027 dev_dbg(nau8825->dev, "Sysclk is %dHz and clock id is %d\n", freq,
1028 clk_id);
1029 return 0;
1030 }
1031
nau8825_set_sysclk(struct snd_soc_codec * codec,int clk_id,int source,unsigned int freq,int dir)1032 static int nau8825_set_sysclk(struct snd_soc_codec *codec, int clk_id,
1033 int source, unsigned int freq, int dir)
1034 {
1035 struct nau8825 *nau8825 = snd_soc_codec_get_drvdata(codec);
1036
1037 return nau8825_configure_sysclk(nau8825, clk_id, freq);
1038 }
1039
nau8825_set_bias_level(struct snd_soc_codec * codec,enum snd_soc_bias_level level)1040 static int nau8825_set_bias_level(struct snd_soc_codec *codec,
1041 enum snd_soc_bias_level level)
1042 {
1043 struct nau8825 *nau8825 = snd_soc_codec_get_drvdata(codec);
1044 int ret;
1045
1046 switch (level) {
1047 case SND_SOC_BIAS_ON:
1048 break;
1049
1050 case SND_SOC_BIAS_PREPARE:
1051 break;
1052
1053 case SND_SOC_BIAS_STANDBY:
1054 if (snd_soc_codec_get_bias_level(codec) == SND_SOC_BIAS_OFF) {
1055 if (nau8825->mclk_freq) {
1056 ret = clk_prepare_enable(nau8825->mclk);
1057 if (ret) {
1058 dev_err(nau8825->dev, "Unable to prepare codec mclk\n");
1059 return ret;
1060 }
1061 }
1062
1063 ret = regcache_sync(nau8825->regmap);
1064 if (ret) {
1065 dev_err(codec->dev,
1066 "Failed to sync cache: %d\n", ret);
1067 return ret;
1068 }
1069 }
1070
1071 break;
1072
1073 case SND_SOC_BIAS_OFF:
1074 if (nau8825->mclk_freq)
1075 clk_disable_unprepare(nau8825->mclk);
1076
1077 regcache_mark_dirty(nau8825->regmap);
1078 break;
1079 }
1080 return 0;
1081 }
1082
1083 static struct snd_soc_codec_driver nau8825_codec_driver = {
1084 .probe = nau8825_codec_probe,
1085 .set_sysclk = nau8825_set_sysclk,
1086 .set_pll = nau8825_set_pll,
1087 .set_bias_level = nau8825_set_bias_level,
1088 .suspend_bias_off = true,
1089
1090 .controls = nau8825_controls,
1091 .num_controls = ARRAY_SIZE(nau8825_controls),
1092 .dapm_widgets = nau8825_dapm_widgets,
1093 .num_dapm_widgets = ARRAY_SIZE(nau8825_dapm_widgets),
1094 .dapm_routes = nau8825_dapm_routes,
1095 .num_dapm_routes = ARRAY_SIZE(nau8825_dapm_routes),
1096 };
1097
nau8825_reset_chip(struct regmap * regmap)1098 static void nau8825_reset_chip(struct regmap *regmap)
1099 {
1100 regmap_write(regmap, NAU8825_REG_RESET, 0x00);
1101 regmap_write(regmap, NAU8825_REG_RESET, 0x00);
1102 }
1103
nau8825_print_device_properties(struct nau8825 * nau8825)1104 static void nau8825_print_device_properties(struct nau8825 *nau8825)
1105 {
1106 int i;
1107 struct device *dev = nau8825->dev;
1108
1109 dev_dbg(dev, "jkdet-enable: %d\n", nau8825->jkdet_enable);
1110 dev_dbg(dev, "jkdet-pull-enable: %d\n", nau8825->jkdet_pull_enable);
1111 dev_dbg(dev, "jkdet-pull-up: %d\n", nau8825->jkdet_pull_up);
1112 dev_dbg(dev, "jkdet-polarity: %d\n", nau8825->jkdet_polarity);
1113 dev_dbg(dev, "micbias-voltage: %d\n", nau8825->micbias_voltage);
1114 dev_dbg(dev, "vref-impedance: %d\n", nau8825->vref_impedance);
1115
1116 dev_dbg(dev, "sar-threshold-num: %d\n", nau8825->sar_threshold_num);
1117 for (i = 0; i < nau8825->sar_threshold_num; i++)
1118 dev_dbg(dev, "sar-threshold[%d]=%d\n", i,
1119 nau8825->sar_threshold[i]);
1120
1121 dev_dbg(dev, "sar-hysteresis: %d\n", nau8825->sar_hysteresis);
1122 dev_dbg(dev, "sar-voltage: %d\n", nau8825->sar_voltage);
1123 dev_dbg(dev, "sar-compare-time: %d\n", nau8825->sar_compare_time);
1124 dev_dbg(dev, "sar-sampling-time: %d\n", nau8825->sar_sampling_time);
1125 dev_dbg(dev, "short-key-debounce: %d\n", nau8825->key_debounce);
1126 dev_dbg(dev, "jack-insert-debounce: %d\n",
1127 nau8825->jack_insert_debounce);
1128 dev_dbg(dev, "jack-eject-debounce: %d\n",
1129 nau8825->jack_eject_debounce);
1130 }
1131
nau8825_read_device_properties(struct device * dev,struct nau8825 * nau8825)1132 static int nau8825_read_device_properties(struct device *dev,
1133 struct nau8825 *nau8825) {
1134
1135 nau8825->jkdet_enable = device_property_read_bool(dev,
1136 "nuvoton,jkdet-enable");
1137 nau8825->jkdet_pull_enable = device_property_read_bool(dev,
1138 "nuvoton,jkdet-pull-enable");
1139 nau8825->jkdet_pull_up = device_property_read_bool(dev,
1140 "nuvoton,jkdet-pull-up");
1141 device_property_read_u32(dev, "nuvoton,jkdet-polarity",
1142 &nau8825->jkdet_polarity);
1143 device_property_read_u32(dev, "nuvoton,micbias-voltage",
1144 &nau8825->micbias_voltage);
1145 device_property_read_u32(dev, "nuvoton,vref-impedance",
1146 &nau8825->vref_impedance);
1147 device_property_read_u32(dev, "nuvoton,sar-threshold-num",
1148 &nau8825->sar_threshold_num);
1149 device_property_read_u32_array(dev, "nuvoton,sar-threshold",
1150 nau8825->sar_threshold, nau8825->sar_threshold_num);
1151 device_property_read_u32(dev, "nuvoton,sar-hysteresis",
1152 &nau8825->sar_hysteresis);
1153 device_property_read_u32(dev, "nuvoton,sar-voltage",
1154 &nau8825->sar_voltage);
1155 device_property_read_u32(dev, "nuvoton,sar-compare-time",
1156 &nau8825->sar_compare_time);
1157 device_property_read_u32(dev, "nuvoton,sar-sampling-time",
1158 &nau8825->sar_sampling_time);
1159 device_property_read_u32(dev, "nuvoton,short-key-debounce",
1160 &nau8825->key_debounce);
1161 device_property_read_u32(dev, "nuvoton,jack-insert-debounce",
1162 &nau8825->jack_insert_debounce);
1163 device_property_read_u32(dev, "nuvoton,jack-eject-debounce",
1164 &nau8825->jack_eject_debounce);
1165
1166 nau8825->mclk = devm_clk_get(dev, "mclk");
1167 if (PTR_ERR(nau8825->mclk) == -EPROBE_DEFER) {
1168 return -EPROBE_DEFER;
1169 } else if (PTR_ERR(nau8825->mclk) == -ENOENT) {
1170 /* The MCLK is managed externally or not used at all */
1171 nau8825->mclk = NULL;
1172 dev_info(dev, "No 'mclk' clock found, assume MCLK is managed externally");
1173 } else if (IS_ERR(nau8825->mclk)) {
1174 return -EINVAL;
1175 }
1176
1177 return 0;
1178 }
1179
nau8825_setup_irq(struct nau8825 * nau8825)1180 static int nau8825_setup_irq(struct nau8825 *nau8825)
1181 {
1182 struct regmap *regmap = nau8825->regmap;
1183 int ret;
1184
1185 /* IRQ Output Enable */
1186 regmap_update_bits(regmap, NAU8825_REG_INTERRUPT_MASK,
1187 NAU8825_IRQ_OUTPUT_EN, NAU8825_IRQ_OUTPUT_EN);
1188
1189 /* Enable internal VCO needed for interruptions */
1190 nau8825_configure_sysclk(nau8825, NAU8825_CLK_INTERNAL, 0);
1191
1192 /* Enable DDACR needed for interrupts
1193 * It is the same as force_enable_pin("DDACR") we do later
1194 */
1195 regmap_update_bits(regmap, NAU8825_REG_ENA_CTRL,
1196 NAU8825_ENABLE_DACR, NAU8825_ENABLE_DACR);
1197
1198 /* Chip needs one FSCLK cycle in order to generate interrupts,
1199 * as we cannot guarantee one will be provided by the system. Turning
1200 * master mode on then off enables us to generate that FSCLK cycle
1201 * with a minimum of contention on the clock bus.
1202 */
1203 regmap_update_bits(regmap, NAU8825_REG_I2S_PCM_CTRL2,
1204 NAU8825_I2S_MS_MASK, NAU8825_I2S_MS_MASTER);
1205 regmap_update_bits(regmap, NAU8825_REG_I2S_PCM_CTRL2,
1206 NAU8825_I2S_MS_MASK, NAU8825_I2S_MS_SLAVE);
1207
1208 ret = devm_request_threaded_irq(nau8825->dev, nau8825->irq, NULL,
1209 nau8825_interrupt, IRQF_TRIGGER_LOW | IRQF_ONESHOT,
1210 "nau8825", nau8825);
1211
1212 if (ret) {
1213 dev_err(nau8825->dev, "Cannot request irq %d (%d)\n",
1214 nau8825->irq, ret);
1215 return ret;
1216 }
1217
1218 return 0;
1219 }
1220
nau8825_i2c_probe(struct i2c_client * i2c,const struct i2c_device_id * id)1221 static int nau8825_i2c_probe(struct i2c_client *i2c,
1222 const struct i2c_device_id *id)
1223 {
1224 struct device *dev = &i2c->dev;
1225 struct nau8825 *nau8825 = dev_get_platdata(&i2c->dev);
1226 int ret, value;
1227
1228 if (!nau8825) {
1229 nau8825 = devm_kzalloc(dev, sizeof(*nau8825), GFP_KERNEL);
1230 if (!nau8825)
1231 return -ENOMEM;
1232 ret = nau8825_read_device_properties(dev, nau8825);
1233 if (ret)
1234 return ret;
1235 }
1236
1237 i2c_set_clientdata(i2c, nau8825);
1238
1239 nau8825->regmap = devm_regmap_init_i2c(i2c, &nau8825_regmap_config);
1240 if (IS_ERR(nau8825->regmap))
1241 return PTR_ERR(nau8825->regmap);
1242 nau8825->dev = dev;
1243 nau8825->irq = i2c->irq;
1244
1245 nau8825_print_device_properties(nau8825);
1246
1247 nau8825_reset_chip(nau8825->regmap);
1248 ret = regmap_read(nau8825->regmap, NAU8825_REG_I2C_DEVICE_ID, &value);
1249 if (ret < 0) {
1250 dev_err(dev, "Failed to read device id from the NAU8825: %d\n",
1251 ret);
1252 return ret;
1253 }
1254 if ((value & NAU8825_SOFTWARE_ID_MASK) !=
1255 NAU8825_SOFTWARE_ID_NAU8825) {
1256 dev_err(dev, "Not a NAU8825 chip\n");
1257 return -ENODEV;
1258 }
1259
1260 nau8825_init_regs(nau8825);
1261
1262 if (i2c->irq)
1263 nau8825_setup_irq(nau8825);
1264
1265 return snd_soc_register_codec(&i2c->dev, &nau8825_codec_driver,
1266 &nau8825_dai, 1);
1267 }
1268
nau8825_i2c_remove(struct i2c_client * client)1269 static int nau8825_i2c_remove(struct i2c_client *client)
1270 {
1271 snd_soc_unregister_codec(&client->dev);
1272 return 0;
1273 }
1274
1275 #ifdef CONFIG_PM_SLEEP
nau8825_suspend(struct device * dev)1276 static int nau8825_suspend(struct device *dev)
1277 {
1278 struct i2c_client *client = to_i2c_client(dev);
1279 struct nau8825 *nau8825 = dev_get_drvdata(dev);
1280
1281 disable_irq(client->irq);
1282 regcache_cache_only(nau8825->regmap, true);
1283 regcache_mark_dirty(nau8825->regmap);
1284
1285 return 0;
1286 }
1287
nau8825_resume(struct device * dev)1288 static int nau8825_resume(struct device *dev)
1289 {
1290 struct i2c_client *client = to_i2c_client(dev);
1291 struct nau8825 *nau8825 = dev_get_drvdata(dev);
1292
1293 regcache_cache_only(nau8825->regmap, false);
1294 regcache_sync(nau8825->regmap);
1295 enable_irq(client->irq);
1296
1297 return 0;
1298 }
1299 #endif
1300
1301 static const struct dev_pm_ops nau8825_pm = {
1302 SET_SYSTEM_SLEEP_PM_OPS(nau8825_suspend, nau8825_resume)
1303 };
1304
1305 static const struct i2c_device_id nau8825_i2c_ids[] = {
1306 { "nau8825", 0 },
1307 { }
1308 };
1309
1310 #ifdef CONFIG_OF
1311 static const struct of_device_id nau8825_of_ids[] = {
1312 { .compatible = "nuvoton,nau8825", },
1313 {}
1314 };
1315 MODULE_DEVICE_TABLE(of, nau8825_of_ids);
1316 #endif
1317
1318 #ifdef CONFIG_ACPI
1319 static const struct acpi_device_id nau8825_acpi_match[] = {
1320 { "10508825", 0 },
1321 {},
1322 };
1323 MODULE_DEVICE_TABLE(acpi, nau8825_acpi_match);
1324 #endif
1325
1326 static struct i2c_driver nau8825_driver = {
1327 .driver = {
1328 .name = "nau8825",
1329 .of_match_table = of_match_ptr(nau8825_of_ids),
1330 .acpi_match_table = ACPI_PTR(nau8825_acpi_match),
1331 .pm = &nau8825_pm,
1332 },
1333 .probe = nau8825_i2c_probe,
1334 .remove = nau8825_i2c_remove,
1335 .id_table = nau8825_i2c_ids,
1336 };
1337 module_i2c_driver(nau8825_driver);
1338
1339 MODULE_DESCRIPTION("ASoC nau8825 driver");
1340 MODULE_AUTHOR("Anatol Pomozov <anatol@chromium.org>");
1341 MODULE_LICENSE("GPL");
1342