1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Nuvoton NAU8825 audio codec driver
4 *
5 * Copyright 2015 Google Chromium project.
6 * Author: Anatol Pomozov <anatol@chromium.org>
7 * Copyright 2015 Nuvoton Technology Corp.
8 * Co-author: Meng-Huang Kuo <mhkuo@nuvoton.com>
9 */
10
11 #include <linux/module.h>
12 #include <linux/delay.h>
13 #include <linux/init.h>
14 #include <linux/i2c.h>
15 #include <linux/regmap.h>
16 #include <linux/slab.h>
17 #include <linux/clk.h>
18 #include <linux/acpi.h>
19 #include <linux/math64.h>
20 #include <linux/semaphore.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
34 #define NUVOTON_CODEC_DAI "nau8825-hifi"
35
36 #define NAU_FREF_MAX 13500000
37 #define NAU_FVCO_MAX 124000000
38 #define NAU_FVCO_MIN 90000000
39
40 /* cross talk suppression detection */
41 #define LOG10_MAGIC 646456993
42 #define GAIN_AUGMENT 22500
43 #define SIDETONE_BASE 207000
44
45 /* the maximum frequency of CLK_ADC and CLK_DAC */
46 #define CLK_DA_AD_MAX 6144000
47
48 static int nau8825_configure_sysclk(struct nau8825 *nau8825,
49 int clk_id, unsigned int freq);
50
51 struct nau8825_fll {
52 int mclk_src;
53 int ratio;
54 int fll_frac;
55 int fll_int;
56 int clk_ref_div;
57 };
58
59 struct nau8825_fll_attr {
60 unsigned int param;
61 unsigned int val;
62 };
63
64 /* scaling for mclk from sysclk_src output */
65 static const struct nau8825_fll_attr mclk_src_scaling[] = {
66 { 1, 0x0 },
67 { 2, 0x2 },
68 { 4, 0x3 },
69 { 8, 0x4 },
70 { 16, 0x5 },
71 { 32, 0x6 },
72 { 3, 0x7 },
73 { 6, 0xa },
74 { 12, 0xb },
75 { 24, 0xc },
76 { 48, 0xd },
77 { 96, 0xe },
78 { 5, 0xf },
79 };
80
81 /* ratio for input clk freq */
82 static const struct nau8825_fll_attr fll_ratio[] = {
83 { 512000, 0x01 },
84 { 256000, 0x02 },
85 { 128000, 0x04 },
86 { 64000, 0x08 },
87 { 32000, 0x10 },
88 { 8000, 0x20 },
89 { 4000, 0x40 },
90 };
91
92 static const struct nau8825_fll_attr fll_pre_scalar[] = {
93 { 1, 0x0 },
94 { 2, 0x1 },
95 { 4, 0x2 },
96 { 8, 0x3 },
97 };
98
99 /* over sampling rate */
100 struct nau8825_osr_attr {
101 unsigned int osr;
102 unsigned int clk_src;
103 };
104
105 static const struct nau8825_osr_attr osr_dac_sel[] = {
106 { 64, 2 }, /* OSR 64, SRC 1/4 */
107 { 256, 0 }, /* OSR 256, SRC 1 */
108 { 128, 1 }, /* OSR 128, SRC 1/2 */
109 { 0, 0 },
110 { 32, 3 }, /* OSR 32, SRC 1/8 */
111 };
112
113 static const struct nau8825_osr_attr osr_adc_sel[] = {
114 { 32, 3 }, /* OSR 32, SRC 1/8 */
115 { 64, 2 }, /* OSR 64, SRC 1/4 */
116 { 128, 1 }, /* OSR 128, SRC 1/2 */
117 { 256, 0 }, /* OSR 256, SRC 1 */
118 };
119
120 static const struct reg_default nau8825_reg_defaults[] = {
121 { NAU8825_REG_ENA_CTRL, 0x00ff },
122 { NAU8825_REG_IIC_ADDR_SET, 0x0 },
123 { NAU8825_REG_CLK_DIVIDER, 0x0050 },
124 { NAU8825_REG_FLL1, 0x0 },
125 { NAU8825_REG_FLL2, 0x3126 },
126 { NAU8825_REG_FLL3, 0x0008 },
127 { NAU8825_REG_FLL4, 0x0010 },
128 { NAU8825_REG_FLL5, 0x0 },
129 { NAU8825_REG_FLL6, 0x6000 },
130 { NAU8825_REG_FLL_VCO_RSV, 0xf13c },
131 { NAU8825_REG_HSD_CTRL, 0x000c },
132 { NAU8825_REG_JACK_DET_CTRL, 0x0 },
133 { NAU8825_REG_INTERRUPT_MASK, 0x0 },
134 { NAU8825_REG_INTERRUPT_DIS_CTRL, 0xffff },
135 { NAU8825_REG_SAR_CTRL, 0x0015 },
136 { NAU8825_REG_KEYDET_CTRL, 0x0110 },
137 { NAU8825_REG_VDET_THRESHOLD_1, 0x0 },
138 { NAU8825_REG_VDET_THRESHOLD_2, 0x0 },
139 { NAU8825_REG_VDET_THRESHOLD_3, 0x0 },
140 { NAU8825_REG_VDET_THRESHOLD_4, 0x0 },
141 { NAU8825_REG_GPIO34_CTRL, 0x0 },
142 { NAU8825_REG_GPIO12_CTRL, 0x0 },
143 { NAU8825_REG_TDM_CTRL, 0x0 },
144 { NAU8825_REG_I2S_PCM_CTRL1, 0x000b },
145 { NAU8825_REG_I2S_PCM_CTRL2, 0x8010 },
146 { NAU8825_REG_LEFT_TIME_SLOT, 0x0 },
147 { NAU8825_REG_RIGHT_TIME_SLOT, 0x0 },
148 { NAU8825_REG_BIQ_CTRL, 0x0 },
149 { NAU8825_REG_BIQ_COF1, 0x0 },
150 { NAU8825_REG_BIQ_COF2, 0x0 },
151 { NAU8825_REG_BIQ_COF3, 0x0 },
152 { NAU8825_REG_BIQ_COF4, 0x0 },
153 { NAU8825_REG_BIQ_COF5, 0x0 },
154 { NAU8825_REG_BIQ_COF6, 0x0 },
155 { NAU8825_REG_BIQ_COF7, 0x0 },
156 { NAU8825_REG_BIQ_COF8, 0x0 },
157 { NAU8825_REG_BIQ_COF9, 0x0 },
158 { NAU8825_REG_BIQ_COF10, 0x0 },
159 { NAU8825_REG_ADC_RATE, 0x0010 },
160 { NAU8825_REG_DAC_CTRL1, 0x0001 },
161 { NAU8825_REG_DAC_CTRL2, 0x0 },
162 { NAU8825_REG_DAC_DGAIN_CTRL, 0x0 },
163 { NAU8825_REG_ADC_DGAIN_CTRL, 0x00cf },
164 { NAU8825_REG_MUTE_CTRL, 0x0 },
165 { NAU8825_REG_HSVOL_CTRL, 0x0 },
166 { NAU8825_REG_DACL_CTRL, 0x02cf },
167 { NAU8825_REG_DACR_CTRL, 0x00cf },
168 { NAU8825_REG_ADC_DRC_KNEE_IP12, 0x1486 },
169 { NAU8825_REG_ADC_DRC_KNEE_IP34, 0x0f12 },
170 { NAU8825_REG_ADC_DRC_SLOPES, 0x25ff },
171 { NAU8825_REG_ADC_DRC_ATKDCY, 0x3457 },
172 { NAU8825_REG_DAC_DRC_KNEE_IP12, 0x1486 },
173 { NAU8825_REG_DAC_DRC_KNEE_IP34, 0x0f12 },
174 { NAU8825_REG_DAC_DRC_SLOPES, 0x25f9 },
175 { NAU8825_REG_DAC_DRC_ATKDCY, 0x3457 },
176 { NAU8825_REG_IMM_MODE_CTRL, 0x0 },
177 { NAU8825_REG_CLASSG_CTRL, 0x0 },
178 { NAU8825_REG_OPT_EFUSE_CTRL, 0x0 },
179 { NAU8825_REG_MISC_CTRL, 0x0 },
180 { NAU8825_REG_BIAS_ADJ, 0x0 },
181 { NAU8825_REG_TRIM_SETTINGS, 0x0 },
182 { NAU8825_REG_ANALOG_CONTROL_1, 0x0 },
183 { NAU8825_REG_ANALOG_CONTROL_2, 0x0 },
184 { NAU8825_REG_ANALOG_ADC_1, 0x0011 },
185 { NAU8825_REG_ANALOG_ADC_2, 0x0020 },
186 { NAU8825_REG_RDAC, 0x0008 },
187 { NAU8825_REG_MIC_BIAS, 0x0006 },
188 { NAU8825_REG_BOOST, 0x0 },
189 { NAU8825_REG_FEPGA, 0x0 },
190 { NAU8825_REG_POWER_UP_CONTROL, 0x0 },
191 { NAU8825_REG_CHARGE_PUMP, 0x0 },
192 };
193
194 /* register backup table when cross talk detection */
195 static struct reg_default nau8825_xtalk_baktab[] = {
196 { NAU8825_REG_ADC_DGAIN_CTRL, 0x00cf },
197 { NAU8825_REG_HSVOL_CTRL, 0 },
198 { NAU8825_REG_DACL_CTRL, 0x00cf },
199 { NAU8825_REG_DACR_CTRL, 0x02cf },
200 };
201
202 static const unsigned short logtable[256] = {
203 0x0000, 0x0171, 0x02e0, 0x044e, 0x05ba, 0x0725, 0x088e, 0x09f7,
204 0x0b5d, 0x0cc3, 0x0e27, 0x0f8a, 0x10eb, 0x124b, 0x13aa, 0x1508,
205 0x1664, 0x17bf, 0x1919, 0x1a71, 0x1bc8, 0x1d1e, 0x1e73, 0x1fc6,
206 0x2119, 0x226a, 0x23ba, 0x2508, 0x2656, 0x27a2, 0x28ed, 0x2a37,
207 0x2b80, 0x2cc8, 0x2e0f, 0x2f54, 0x3098, 0x31dc, 0x331e, 0x345f,
208 0x359f, 0x36de, 0x381b, 0x3958, 0x3a94, 0x3bce, 0x3d08, 0x3e41,
209 0x3f78, 0x40af, 0x41e4, 0x4319, 0x444c, 0x457f, 0x46b0, 0x47e1,
210 0x4910, 0x4a3f, 0x4b6c, 0x4c99, 0x4dc5, 0x4eef, 0x5019, 0x5142,
211 0x526a, 0x5391, 0x54b7, 0x55dc, 0x5700, 0x5824, 0x5946, 0x5a68,
212 0x5b89, 0x5ca8, 0x5dc7, 0x5ee5, 0x6003, 0x611f, 0x623a, 0x6355,
213 0x646f, 0x6588, 0x66a0, 0x67b7, 0x68ce, 0x69e4, 0x6af8, 0x6c0c,
214 0x6d20, 0x6e32, 0x6f44, 0x7055, 0x7165, 0x7274, 0x7383, 0x7490,
215 0x759d, 0x76aa, 0x77b5, 0x78c0, 0x79ca, 0x7ad3, 0x7bdb, 0x7ce3,
216 0x7dea, 0x7ef0, 0x7ff6, 0x80fb, 0x81ff, 0x8302, 0x8405, 0x8507,
217 0x8608, 0x8709, 0x8809, 0x8908, 0x8a06, 0x8b04, 0x8c01, 0x8cfe,
218 0x8dfa, 0x8ef5, 0x8fef, 0x90e9, 0x91e2, 0x92db, 0x93d2, 0x94ca,
219 0x95c0, 0x96b6, 0x97ab, 0x98a0, 0x9994, 0x9a87, 0x9b7a, 0x9c6c,
220 0x9d5e, 0x9e4f, 0x9f3f, 0xa02e, 0xa11e, 0xa20c, 0xa2fa, 0xa3e7,
221 0xa4d4, 0xa5c0, 0xa6ab, 0xa796, 0xa881, 0xa96a, 0xaa53, 0xab3c,
222 0xac24, 0xad0c, 0xadf2, 0xaed9, 0xafbe, 0xb0a4, 0xb188, 0xb26c,
223 0xb350, 0xb433, 0xb515, 0xb5f7, 0xb6d9, 0xb7ba, 0xb89a, 0xb97a,
224 0xba59, 0xbb38, 0xbc16, 0xbcf4, 0xbdd1, 0xbead, 0xbf8a, 0xc065,
225 0xc140, 0xc21b, 0xc2f5, 0xc3cf, 0xc4a8, 0xc580, 0xc658, 0xc730,
226 0xc807, 0xc8de, 0xc9b4, 0xca8a, 0xcb5f, 0xcc34, 0xcd08, 0xcddc,
227 0xceaf, 0xcf82, 0xd054, 0xd126, 0xd1f7, 0xd2c8, 0xd399, 0xd469,
228 0xd538, 0xd607, 0xd6d6, 0xd7a4, 0xd872, 0xd93f, 0xda0c, 0xdad9,
229 0xdba5, 0xdc70, 0xdd3b, 0xde06, 0xded0, 0xdf9a, 0xe063, 0xe12c,
230 0xe1f5, 0xe2bd, 0xe385, 0xe44c, 0xe513, 0xe5d9, 0xe69f, 0xe765,
231 0xe82a, 0xe8ef, 0xe9b3, 0xea77, 0xeb3b, 0xebfe, 0xecc1, 0xed83,
232 0xee45, 0xef06, 0xefc8, 0xf088, 0xf149, 0xf209, 0xf2c8, 0xf387,
233 0xf446, 0xf505, 0xf5c3, 0xf680, 0xf73e, 0xf7fb, 0xf8b7, 0xf973,
234 0xfa2f, 0xfaea, 0xfba5, 0xfc60, 0xfd1a, 0xfdd4, 0xfe8e, 0xff47
235 };
236
237 /**
238 * nau8825_sema_acquire - acquire the semaphore of nau88l25
239 * @nau8825: component to register the codec private data with
240 * @timeout: how long in jiffies to wait before failure or zero to wait
241 * until release
242 *
243 * Attempts to acquire the semaphore with number of jiffies. If no more
244 * tasks are allowed to acquire the semaphore, calling this function will
245 * put the task to sleep. If the semaphore is not released within the
246 * specified number of jiffies, this function returns.
247 * If the semaphore is not released within the specified number of jiffies,
248 * this function returns -ETIME. If the sleep is interrupted by a signal,
249 * this function will return -EINTR. It returns 0 if the semaphore was
250 * acquired successfully.
251 *
252 * Acquires the semaphore without jiffies. Try to acquire the semaphore
253 * atomically. Returns 0 if the semaphore has been acquired successfully
254 * or 1 if it cannot be acquired.
255 */
nau8825_sema_acquire(struct nau8825 * nau8825,long timeout)256 static int nau8825_sema_acquire(struct nau8825 *nau8825, long timeout)
257 {
258 int ret;
259
260 if (timeout) {
261 ret = down_timeout(&nau8825->xtalk_sem, timeout);
262 if (ret < 0)
263 dev_warn(nau8825->dev, "Acquire semaphore timeout\n");
264 } else {
265 ret = down_trylock(&nau8825->xtalk_sem);
266 if (ret)
267 dev_warn(nau8825->dev, "Acquire semaphore fail\n");
268 }
269
270 return ret;
271 }
272
273 /**
274 * nau8825_sema_release - release the semaphore of nau88l25
275 * @nau8825: component to register the codec private data with
276 *
277 * Release the semaphore which may be called from any context and
278 * even by tasks which have never called down().
279 */
nau8825_sema_release(struct nau8825 * nau8825)280 static inline void nau8825_sema_release(struct nau8825 *nau8825)
281 {
282 up(&nau8825->xtalk_sem);
283 }
284
285 /**
286 * nau8825_sema_reset - reset the semaphore for nau88l25
287 * @nau8825: component to register the codec private data with
288 *
289 * Reset the counter of the semaphore. Call this function to restart
290 * a new round task management.
291 */
nau8825_sema_reset(struct nau8825 * nau8825)292 static inline void nau8825_sema_reset(struct nau8825 *nau8825)
293 {
294 nau8825->xtalk_sem.count = 1;
295 }
296
297 /**
298 * Ramp up the headphone volume change gradually to target level.
299 *
300 * @nau8825: component to register the codec private data with
301 * @vol_from: the volume to start up
302 * @vol_to: the target volume
303 * @step: the volume span to move on
304 *
305 * The headphone volume is from 0dB to minimum -54dB and -1dB per step.
306 * If the volume changes sharp, there is a pop noise heard in headphone. We
307 * provide the function to ramp up the volume up or down by delaying 10ms
308 * per step.
309 */
nau8825_hpvol_ramp(struct nau8825 * nau8825,unsigned int vol_from,unsigned int vol_to,unsigned int step)310 static void nau8825_hpvol_ramp(struct nau8825 *nau8825,
311 unsigned int vol_from, unsigned int vol_to, unsigned int step)
312 {
313 unsigned int value, volume, ramp_up, from, to;
314
315 if (vol_from == vol_to || step == 0) {
316 return;
317 } else if (vol_from < vol_to) {
318 ramp_up = true;
319 from = vol_from;
320 to = vol_to;
321 } else {
322 ramp_up = false;
323 from = vol_to;
324 to = vol_from;
325 }
326 /* only handle volume from 0dB to minimum -54dB */
327 if (to > NAU8825_HP_VOL_MIN)
328 to = NAU8825_HP_VOL_MIN;
329
330 for (volume = from; volume < to; volume += step) {
331 if (ramp_up)
332 value = volume;
333 else
334 value = to - volume + from;
335 regmap_update_bits(nau8825->regmap, NAU8825_REG_HSVOL_CTRL,
336 NAU8825_HPL_VOL_MASK | NAU8825_HPR_VOL_MASK,
337 (value << NAU8825_HPL_VOL_SFT) | value);
338 usleep_range(10000, 10500);
339 }
340 if (ramp_up)
341 value = to;
342 else
343 value = from;
344 regmap_update_bits(nau8825->regmap, NAU8825_REG_HSVOL_CTRL,
345 NAU8825_HPL_VOL_MASK | NAU8825_HPR_VOL_MASK,
346 (value << NAU8825_HPL_VOL_SFT) | value);
347 }
348
349 /**
350 * Computes log10 of a value; the result is round off to 3 decimal. This func-
351 * tion takes reference to dvb-math. The source code locates as the following.
352 * Linux/drivers/media/dvb-core/dvb_math.c
353 * @value: input for log10
354 *
355 * return log10(value) * 1000
356 */
nau8825_intlog10_dec3(u32 value)357 static u32 nau8825_intlog10_dec3(u32 value)
358 {
359 u32 msb, logentry, significand, interpolation, log10val;
360 u64 log2val;
361
362 /* first detect the msb (count begins at 0) */
363 msb = fls(value) - 1;
364 /**
365 * now we use a logtable after the following method:
366 *
367 * log2(2^x * y) * 2^24 = x * 2^24 + log2(y) * 2^24
368 * where x = msb and therefore 1 <= y < 2
369 * first y is determined by shifting the value left
370 * so that msb is bit 31
371 * 0x00231f56 -> 0x8C7D5800
372 * the result is y * 2^31 -> "significand"
373 * then the highest 9 bits are used for a table lookup
374 * the highest bit is discarded because it's always set
375 * the highest nine bits in our example are 100011000
376 * so we would use the entry 0x18
377 */
378 significand = value << (31 - msb);
379 logentry = (significand >> 23) & 0xff;
380 /**
381 * last step we do is interpolation because of the
382 * limitations of the log table the error is that part of
383 * the significand which isn't used for lookup then we
384 * compute the ratio between the error and the next table entry
385 * and interpolate it between the log table entry used and the
386 * next one the biggest error possible is 0x7fffff
387 * (in our example it's 0x7D5800)
388 * needed value for next table entry is 0x800000
389 * so the interpolation is
390 * (error / 0x800000) * (logtable_next - logtable_current)
391 * in the implementation the division is moved to the end for
392 * better accuracy there is also an overflow correction if
393 * logtable_next is 256
394 */
395 interpolation = ((significand & 0x7fffff) *
396 ((logtable[(logentry + 1) & 0xff] -
397 logtable[logentry]) & 0xffff)) >> 15;
398
399 log2val = ((msb << 24) + (logtable[logentry] << 8) + interpolation);
400 /**
401 * log10(x) = log2(x) * log10(2)
402 */
403 log10val = (log2val * LOG10_MAGIC) >> 31;
404 /**
405 * the result is round off to 3 decimal
406 */
407 return log10val / ((1 << 24) / 1000);
408 }
409
410 /**
411 * computes cross talk suppression sidetone gain.
412 *
413 * @sig_org: orignal signal level
414 * @sig_cros: cross talk signal level
415 *
416 * The orignal and cross talk signal vlues need to be characterized.
417 * Once these values have been characterized, this sidetone value
418 * can be converted to decibel with the equation below.
419 * sidetone = 20 * log (original signal level / crosstalk signal level)
420 *
421 * return cross talk sidetone gain
422 */
nau8825_xtalk_sidetone(u32 sig_org,u32 sig_cros)423 static u32 nau8825_xtalk_sidetone(u32 sig_org, u32 sig_cros)
424 {
425 u32 gain, sidetone;
426
427 if (WARN_ON(sig_org == 0 || sig_cros == 0))
428 return 0;
429
430 sig_org = nau8825_intlog10_dec3(sig_org);
431 sig_cros = nau8825_intlog10_dec3(sig_cros);
432 if (sig_org >= sig_cros)
433 gain = (sig_org - sig_cros) * 20 + GAIN_AUGMENT;
434 else
435 gain = (sig_cros - sig_org) * 20 + GAIN_AUGMENT;
436 sidetone = SIDETONE_BASE - gain * 2;
437 sidetone /= 1000;
438
439 return sidetone;
440 }
441
nau8825_xtalk_baktab_index_by_reg(unsigned int reg)442 static int nau8825_xtalk_baktab_index_by_reg(unsigned int reg)
443 {
444 int index;
445
446 for (index = 0; index < ARRAY_SIZE(nau8825_xtalk_baktab); index++)
447 if (nau8825_xtalk_baktab[index].reg == reg)
448 return index;
449 return -EINVAL;
450 }
451
nau8825_xtalk_backup(struct nau8825 * nau8825)452 static void nau8825_xtalk_backup(struct nau8825 *nau8825)
453 {
454 int i;
455
456 if (nau8825->xtalk_baktab_initialized)
457 return;
458
459 /* Backup some register values to backup table */
460 for (i = 0; i < ARRAY_SIZE(nau8825_xtalk_baktab); i++)
461 regmap_read(nau8825->regmap, nau8825_xtalk_baktab[i].reg,
462 &nau8825_xtalk_baktab[i].def);
463
464 nau8825->xtalk_baktab_initialized = true;
465 }
466
nau8825_xtalk_restore(struct nau8825 * nau8825,bool cause_cancel)467 static void nau8825_xtalk_restore(struct nau8825 *nau8825, bool cause_cancel)
468 {
469 int i, volume;
470
471 if (!nau8825->xtalk_baktab_initialized)
472 return;
473
474 /* Restore register values from backup table; When the driver restores
475 * the headphone volume in XTALK_DONE state, it needs recover to
476 * original level gradually with 3dB per step for less pop noise.
477 * Otherwise, the restore should do ASAP.
478 */
479 for (i = 0; i < ARRAY_SIZE(nau8825_xtalk_baktab); i++) {
480 if (!cause_cancel && nau8825_xtalk_baktab[i].reg ==
481 NAU8825_REG_HSVOL_CTRL) {
482 /* Ramping up the volume change to reduce pop noise */
483 volume = nau8825_xtalk_baktab[i].def &
484 NAU8825_HPR_VOL_MASK;
485 nau8825_hpvol_ramp(nau8825, 0, volume, 3);
486 continue;
487 }
488 regmap_write(nau8825->regmap, nau8825_xtalk_baktab[i].reg,
489 nau8825_xtalk_baktab[i].def);
490 }
491
492 nau8825->xtalk_baktab_initialized = false;
493 }
494
nau8825_xtalk_prepare_dac(struct nau8825 * nau8825)495 static void nau8825_xtalk_prepare_dac(struct nau8825 *nau8825)
496 {
497 /* Enable power of DAC path */
498 regmap_update_bits(nau8825->regmap, NAU8825_REG_ENA_CTRL,
499 NAU8825_ENABLE_DACR | NAU8825_ENABLE_DACL |
500 NAU8825_ENABLE_ADC | NAU8825_ENABLE_ADC_CLK |
501 NAU8825_ENABLE_DAC_CLK, NAU8825_ENABLE_DACR |
502 NAU8825_ENABLE_DACL | NAU8825_ENABLE_ADC |
503 NAU8825_ENABLE_ADC_CLK | NAU8825_ENABLE_DAC_CLK);
504 /* Prevent startup click by letting charge pump to ramp up and
505 * change bump enable
506 */
507 regmap_update_bits(nau8825->regmap, NAU8825_REG_CHARGE_PUMP,
508 NAU8825_JAMNODCLOW | NAU8825_CHANRGE_PUMP_EN,
509 NAU8825_JAMNODCLOW | NAU8825_CHANRGE_PUMP_EN);
510 /* Enable clock sync of DAC and DAC clock */
511 regmap_update_bits(nau8825->regmap, NAU8825_REG_RDAC,
512 NAU8825_RDAC_EN | NAU8825_RDAC_CLK_EN |
513 NAU8825_RDAC_FS_BCLK_ENB,
514 NAU8825_RDAC_EN | NAU8825_RDAC_CLK_EN);
515 /* Power up output driver with 2 stage */
516 regmap_update_bits(nau8825->regmap, NAU8825_REG_POWER_UP_CONTROL,
517 NAU8825_POWERUP_INTEGR_R | NAU8825_POWERUP_INTEGR_L |
518 NAU8825_POWERUP_DRV_IN_R | NAU8825_POWERUP_DRV_IN_L,
519 NAU8825_POWERUP_INTEGR_R | NAU8825_POWERUP_INTEGR_L |
520 NAU8825_POWERUP_DRV_IN_R | NAU8825_POWERUP_DRV_IN_L);
521 regmap_update_bits(nau8825->regmap, NAU8825_REG_POWER_UP_CONTROL,
522 NAU8825_POWERUP_HP_DRV_R | NAU8825_POWERUP_HP_DRV_L,
523 NAU8825_POWERUP_HP_DRV_R | NAU8825_POWERUP_HP_DRV_L);
524 /* HP outputs not shouted to ground */
525 regmap_update_bits(nau8825->regmap, NAU8825_REG_HSD_CTRL,
526 NAU8825_SPKR_DWN1R | NAU8825_SPKR_DWN1L, 0);
527 /* Enable HP boost driver */
528 regmap_update_bits(nau8825->regmap, NAU8825_REG_BOOST,
529 NAU8825_HP_BOOST_DIS, NAU8825_HP_BOOST_DIS);
530 /* Enable class G compare path to supply 1.8V or 0.9V. */
531 regmap_update_bits(nau8825->regmap, NAU8825_REG_CLASSG_CTRL,
532 NAU8825_CLASSG_LDAC_EN | NAU8825_CLASSG_RDAC_EN,
533 NAU8825_CLASSG_LDAC_EN | NAU8825_CLASSG_RDAC_EN);
534 }
535
nau8825_xtalk_prepare_adc(struct nau8825 * nau8825)536 static void nau8825_xtalk_prepare_adc(struct nau8825 *nau8825)
537 {
538 /* Power up left ADC and raise 5dB than Vmid for Vref */
539 regmap_update_bits(nau8825->regmap, NAU8825_REG_ANALOG_ADC_2,
540 NAU8825_POWERUP_ADCL | NAU8825_ADC_VREFSEL_MASK,
541 NAU8825_POWERUP_ADCL | NAU8825_ADC_VREFSEL_VMID_PLUS_0_5DB);
542 }
543
nau8825_xtalk_clock(struct nau8825 * nau8825)544 static void nau8825_xtalk_clock(struct nau8825 *nau8825)
545 {
546 /* Recover FLL default value */
547 regmap_write(nau8825->regmap, NAU8825_REG_FLL1, 0x0);
548 regmap_write(nau8825->regmap, NAU8825_REG_FLL2, 0x3126);
549 regmap_write(nau8825->regmap, NAU8825_REG_FLL3, 0x0008);
550 regmap_write(nau8825->regmap, NAU8825_REG_FLL4, 0x0010);
551 regmap_write(nau8825->regmap, NAU8825_REG_FLL5, 0x0);
552 regmap_write(nau8825->regmap, NAU8825_REG_FLL6, 0x6000);
553 /* Enable internal VCO clock for detection signal generated */
554 regmap_update_bits(nau8825->regmap, NAU8825_REG_CLK_DIVIDER,
555 NAU8825_CLK_SRC_MASK, NAU8825_CLK_SRC_VCO);
556 regmap_update_bits(nau8825->regmap, NAU8825_REG_FLL6, NAU8825_DCO_EN,
557 NAU8825_DCO_EN);
558 /* Given specific clock frequency of internal clock to
559 * generate signal.
560 */
561 regmap_update_bits(nau8825->regmap, NAU8825_REG_CLK_DIVIDER,
562 NAU8825_CLK_MCLK_SRC_MASK, 0xf);
563 regmap_update_bits(nau8825->regmap, NAU8825_REG_FLL1,
564 NAU8825_FLL_RATIO_MASK, 0x10);
565 }
566
nau8825_xtalk_prepare(struct nau8825 * nau8825)567 static void nau8825_xtalk_prepare(struct nau8825 *nau8825)
568 {
569 int volume, index;
570
571 /* Backup those registers changed by cross talk detection */
572 nau8825_xtalk_backup(nau8825);
573 /* Config IIS as master to output signal by codec */
574 regmap_update_bits(nau8825->regmap, NAU8825_REG_I2S_PCM_CTRL2,
575 NAU8825_I2S_MS_MASK | NAU8825_I2S_LRC_DIV_MASK |
576 NAU8825_I2S_BLK_DIV_MASK, NAU8825_I2S_MS_MASTER |
577 (0x2 << NAU8825_I2S_LRC_DIV_SFT) | 0x1);
578 /* Ramp up headphone volume to 0dB to get better performance and
579 * avoid pop noise in headphone.
580 */
581 index = nau8825_xtalk_baktab_index_by_reg(NAU8825_REG_HSVOL_CTRL);
582 if (index != -EINVAL) {
583 volume = nau8825_xtalk_baktab[index].def &
584 NAU8825_HPR_VOL_MASK;
585 nau8825_hpvol_ramp(nau8825, volume, 0, 3);
586 }
587 nau8825_xtalk_clock(nau8825);
588 nau8825_xtalk_prepare_dac(nau8825);
589 nau8825_xtalk_prepare_adc(nau8825);
590 /* Config channel path and digital gain */
591 regmap_update_bits(nau8825->regmap, NAU8825_REG_DACL_CTRL,
592 NAU8825_DACL_CH_SEL_MASK | NAU8825_DACL_CH_VOL_MASK,
593 NAU8825_DACL_CH_SEL_L | 0xab);
594 regmap_update_bits(nau8825->regmap, NAU8825_REG_DACR_CTRL,
595 NAU8825_DACR_CH_SEL_MASK | NAU8825_DACR_CH_VOL_MASK,
596 NAU8825_DACR_CH_SEL_R | 0xab);
597 /* Config cross talk parameters and generate the 23Hz sine wave with
598 * 1/16 full scale of signal level for impedance measurement.
599 */
600 regmap_update_bits(nau8825->regmap, NAU8825_REG_IMM_MODE_CTRL,
601 NAU8825_IMM_THD_MASK | NAU8825_IMM_GEN_VOL_MASK |
602 NAU8825_IMM_CYC_MASK | NAU8825_IMM_DAC_SRC_MASK,
603 (0x9 << NAU8825_IMM_THD_SFT) | NAU8825_IMM_GEN_VOL_1_16th |
604 NAU8825_IMM_CYC_8192 | NAU8825_IMM_DAC_SRC_SIN);
605 /* RMS intrruption enable */
606 regmap_update_bits(nau8825->regmap,
607 NAU8825_REG_INTERRUPT_MASK, NAU8825_IRQ_RMS_EN, 0);
608 /* Power up left and right DAC */
609 regmap_update_bits(nau8825->regmap, NAU8825_REG_CHARGE_PUMP,
610 NAU8825_POWER_DOWN_DACR | NAU8825_POWER_DOWN_DACL, 0);
611 }
612
nau8825_xtalk_clean_dac(struct nau8825 * nau8825)613 static void nau8825_xtalk_clean_dac(struct nau8825 *nau8825)
614 {
615 /* Disable HP boost driver */
616 regmap_update_bits(nau8825->regmap, NAU8825_REG_BOOST,
617 NAU8825_HP_BOOST_DIS, 0);
618 /* HP outputs shouted to ground */
619 regmap_update_bits(nau8825->regmap, NAU8825_REG_HSD_CTRL,
620 NAU8825_SPKR_DWN1R | NAU8825_SPKR_DWN1L,
621 NAU8825_SPKR_DWN1R | NAU8825_SPKR_DWN1L);
622 /* Power down left and right DAC */
623 regmap_update_bits(nau8825->regmap, NAU8825_REG_CHARGE_PUMP,
624 NAU8825_POWER_DOWN_DACR | NAU8825_POWER_DOWN_DACL,
625 NAU8825_POWER_DOWN_DACR | NAU8825_POWER_DOWN_DACL);
626 /* Enable the TESTDAC and disable L/R HP impedance */
627 regmap_update_bits(nau8825->regmap, NAU8825_REG_BIAS_ADJ,
628 NAU8825_BIAS_HPR_IMP | NAU8825_BIAS_HPL_IMP |
629 NAU8825_BIAS_TESTDAC_EN, NAU8825_BIAS_TESTDAC_EN);
630 /* Power down output driver with 2 stage */
631 regmap_update_bits(nau8825->regmap, NAU8825_REG_POWER_UP_CONTROL,
632 NAU8825_POWERUP_HP_DRV_R | NAU8825_POWERUP_HP_DRV_L, 0);
633 regmap_update_bits(nau8825->regmap, NAU8825_REG_POWER_UP_CONTROL,
634 NAU8825_POWERUP_INTEGR_R | NAU8825_POWERUP_INTEGR_L |
635 NAU8825_POWERUP_DRV_IN_R | NAU8825_POWERUP_DRV_IN_L, 0);
636 /* Disable clock sync of DAC and DAC clock */
637 regmap_update_bits(nau8825->regmap, NAU8825_REG_RDAC,
638 NAU8825_RDAC_EN | NAU8825_RDAC_CLK_EN, 0);
639 /* Disable charge pump ramp up function and change bump */
640 regmap_update_bits(nau8825->regmap, NAU8825_REG_CHARGE_PUMP,
641 NAU8825_JAMNODCLOW | NAU8825_CHANRGE_PUMP_EN, 0);
642 /* Disable power of DAC path */
643 regmap_update_bits(nau8825->regmap, NAU8825_REG_ENA_CTRL,
644 NAU8825_ENABLE_DACR | NAU8825_ENABLE_DACL |
645 NAU8825_ENABLE_ADC_CLK | NAU8825_ENABLE_DAC_CLK, 0);
646 if (!nau8825->irq)
647 regmap_update_bits(nau8825->regmap,
648 NAU8825_REG_ENA_CTRL, NAU8825_ENABLE_ADC, 0);
649 }
650
nau8825_xtalk_clean_adc(struct nau8825 * nau8825)651 static void nau8825_xtalk_clean_adc(struct nau8825 *nau8825)
652 {
653 /* Power down left ADC and restore voltage to Vmid */
654 regmap_update_bits(nau8825->regmap, NAU8825_REG_ANALOG_ADC_2,
655 NAU8825_POWERUP_ADCL | NAU8825_ADC_VREFSEL_MASK, 0);
656 }
657
nau8825_xtalk_clean(struct nau8825 * nau8825,bool cause_cancel)658 static void nau8825_xtalk_clean(struct nau8825 *nau8825, bool cause_cancel)
659 {
660 /* Enable internal VCO needed for interruptions */
661 nau8825_configure_sysclk(nau8825, NAU8825_CLK_INTERNAL, 0);
662 nau8825_xtalk_clean_dac(nau8825);
663 nau8825_xtalk_clean_adc(nau8825);
664 /* Clear cross talk parameters and disable */
665 regmap_write(nau8825->regmap, NAU8825_REG_IMM_MODE_CTRL, 0);
666 /* RMS intrruption disable */
667 regmap_update_bits(nau8825->regmap, NAU8825_REG_INTERRUPT_MASK,
668 NAU8825_IRQ_RMS_EN, NAU8825_IRQ_RMS_EN);
669 /* Recover default value for IIS */
670 regmap_update_bits(nau8825->regmap, NAU8825_REG_I2S_PCM_CTRL2,
671 NAU8825_I2S_MS_MASK | NAU8825_I2S_LRC_DIV_MASK |
672 NAU8825_I2S_BLK_DIV_MASK, NAU8825_I2S_MS_SLAVE);
673 /* Restore value of specific register for cross talk */
674 nau8825_xtalk_restore(nau8825, cause_cancel);
675 }
676
nau8825_xtalk_imm_start(struct nau8825 * nau8825,int vol)677 static void nau8825_xtalk_imm_start(struct nau8825 *nau8825, int vol)
678 {
679 /* Apply ADC volume for better cross talk performance */
680 regmap_update_bits(nau8825->regmap, NAU8825_REG_ADC_DGAIN_CTRL,
681 NAU8825_ADC_DIG_VOL_MASK, vol);
682 /* Disables JKTIP(HPL) DAC channel for right to left measurement.
683 * Do it before sending signal in order to erase pop noise.
684 */
685 regmap_update_bits(nau8825->regmap, NAU8825_REG_BIAS_ADJ,
686 NAU8825_BIAS_TESTDACR_EN | NAU8825_BIAS_TESTDACL_EN,
687 NAU8825_BIAS_TESTDACL_EN);
688 switch (nau8825->xtalk_state) {
689 case NAU8825_XTALK_HPR_R2L:
690 /* Enable right headphone impedance */
691 regmap_update_bits(nau8825->regmap, NAU8825_REG_BIAS_ADJ,
692 NAU8825_BIAS_HPR_IMP | NAU8825_BIAS_HPL_IMP,
693 NAU8825_BIAS_HPR_IMP);
694 break;
695 case NAU8825_XTALK_HPL_R2L:
696 /* Enable left headphone impedance */
697 regmap_update_bits(nau8825->regmap, NAU8825_REG_BIAS_ADJ,
698 NAU8825_BIAS_HPR_IMP | NAU8825_BIAS_HPL_IMP,
699 NAU8825_BIAS_HPL_IMP);
700 break;
701 default:
702 break;
703 }
704 msleep(100);
705 /* Impedance measurement mode enable */
706 regmap_update_bits(nau8825->regmap, NAU8825_REG_IMM_MODE_CTRL,
707 NAU8825_IMM_EN, NAU8825_IMM_EN);
708 }
709
nau8825_xtalk_imm_stop(struct nau8825 * nau8825)710 static void nau8825_xtalk_imm_stop(struct nau8825 *nau8825)
711 {
712 /* Impedance measurement mode disable */
713 regmap_update_bits(nau8825->regmap,
714 NAU8825_REG_IMM_MODE_CTRL, NAU8825_IMM_EN, 0);
715 }
716
717 /* The cross talk measurement function can reduce cross talk across the
718 * JKTIP(HPL) and JKR1(HPR) outputs which measures the cross talk signal
719 * level to determine what cross talk reduction gain is. This system works by
720 * sending a 23Hz -24dBV sine wave into the headset output DAC and through
721 * the PGA. The output of the PGA is then connected to an internal current
722 * sense which measures the attenuated 23Hz signal and passing the output to
723 * an ADC which converts the measurement to a binary code. With two separated
724 * measurement, one for JKR1(HPR) and the other JKTIP(HPL), measurement data
725 * can be separated read in IMM_RMS_L for HSR and HSL after each measurement.
726 * Thus, the measurement function has four states to complete whole sequence.
727 * 1. Prepare state : Prepare the resource for detection and transfer to HPR
728 * IMM stat to make JKR1(HPR) impedance measure.
729 * 2. HPR IMM state : Read out orignal signal level of JKR1(HPR) and transfer
730 * to HPL IMM state to make JKTIP(HPL) impedance measure.
731 * 3. HPL IMM state : Read out cross talk signal level of JKTIP(HPL) and
732 * transfer to IMM state to determine suppression sidetone gain.
733 * 4. IMM state : Computes cross talk suppression sidetone gain with orignal
734 * and cross talk signal level. Apply this gain and then restore codec
735 * configuration. Then transfer to Done state for ending.
736 */
nau8825_xtalk_measure(struct nau8825 * nau8825)737 static void nau8825_xtalk_measure(struct nau8825 *nau8825)
738 {
739 u32 sidetone;
740
741 switch (nau8825->xtalk_state) {
742 case NAU8825_XTALK_PREPARE:
743 /* In prepare state, set up clock, intrruption, DAC path, ADC
744 * path and cross talk detection parameters for preparation.
745 */
746 nau8825_xtalk_prepare(nau8825);
747 msleep(280);
748 /* Trigger right headphone impedance detection */
749 nau8825->xtalk_state = NAU8825_XTALK_HPR_R2L;
750 nau8825_xtalk_imm_start(nau8825, 0x00d2);
751 break;
752 case NAU8825_XTALK_HPR_R2L:
753 /* In right headphone IMM state, read out right headphone
754 * impedance measure result, and then start up left side.
755 */
756 regmap_read(nau8825->regmap, NAU8825_REG_IMM_RMS_L,
757 &nau8825->imp_rms[NAU8825_XTALK_HPR_R2L]);
758 dev_dbg(nau8825->dev, "HPR_R2L imm: %x\n",
759 nau8825->imp_rms[NAU8825_XTALK_HPR_R2L]);
760 /* Disable then re-enable IMM mode to update */
761 nau8825_xtalk_imm_stop(nau8825);
762 /* Trigger left headphone impedance detection */
763 nau8825->xtalk_state = NAU8825_XTALK_HPL_R2L;
764 nau8825_xtalk_imm_start(nau8825, 0x00ff);
765 break;
766 case NAU8825_XTALK_HPL_R2L:
767 /* In left headphone IMM state, read out left headphone
768 * impedance measure result, and delay some time to wait
769 * detection sine wave output finish. Then, we can calculate
770 * the cross talk suppresstion side tone according to the L/R
771 * headphone imedance.
772 */
773 regmap_read(nau8825->regmap, NAU8825_REG_IMM_RMS_L,
774 &nau8825->imp_rms[NAU8825_XTALK_HPL_R2L]);
775 dev_dbg(nau8825->dev, "HPL_R2L imm: %x\n",
776 nau8825->imp_rms[NAU8825_XTALK_HPL_R2L]);
777 nau8825_xtalk_imm_stop(nau8825);
778 msleep(150);
779 nau8825->xtalk_state = NAU8825_XTALK_IMM;
780 break;
781 case NAU8825_XTALK_IMM:
782 /* In impedance measure state, the orignal and cross talk
783 * signal level vlues are ready. The side tone gain is deter-
784 * mined with these signal level. After all, restore codec
785 * configuration.
786 */
787 sidetone = nau8825_xtalk_sidetone(
788 nau8825->imp_rms[NAU8825_XTALK_HPR_R2L],
789 nau8825->imp_rms[NAU8825_XTALK_HPL_R2L]);
790 dev_dbg(nau8825->dev, "cross talk sidetone: %x\n", sidetone);
791 regmap_write(nau8825->regmap, NAU8825_REG_DAC_DGAIN_CTRL,
792 (sidetone << 8) | sidetone);
793 nau8825_xtalk_clean(nau8825, false);
794 nau8825->xtalk_state = NAU8825_XTALK_DONE;
795 break;
796 default:
797 break;
798 }
799 }
800
nau8825_xtalk_work(struct work_struct * work)801 static void nau8825_xtalk_work(struct work_struct *work)
802 {
803 struct nau8825 *nau8825 = container_of(
804 work, struct nau8825, xtalk_work);
805
806 nau8825_xtalk_measure(nau8825);
807 /* To determine the cross talk side tone gain when reach
808 * the impedance measure state.
809 */
810 if (nau8825->xtalk_state == NAU8825_XTALK_IMM)
811 nau8825_xtalk_measure(nau8825);
812
813 /* Delay jack report until cross talk detection process
814 * completed. It can avoid application to do playback
815 * preparation before cross talk detection is still working.
816 * Meanwhile, the protection of the cross talk detection
817 * is released.
818 */
819 if (nau8825->xtalk_state == NAU8825_XTALK_DONE) {
820 snd_soc_jack_report(nau8825->jack, nau8825->xtalk_event,
821 nau8825->xtalk_event_mask);
822 nau8825_sema_release(nau8825);
823 nau8825->xtalk_protect = false;
824 }
825 }
826
nau8825_xtalk_cancel(struct nau8825 * nau8825)827 static void nau8825_xtalk_cancel(struct nau8825 *nau8825)
828 {
829 /* If the crosstalk is eanbled and the process is on going,
830 * the driver forces to cancel the crosstalk task and
831 * restores the configuration to original status.
832 */
833 if (nau8825->xtalk_enable && nau8825->xtalk_state !=
834 NAU8825_XTALK_DONE) {
835 cancel_work_sync(&nau8825->xtalk_work);
836 nau8825_xtalk_clean(nau8825, true);
837 }
838 /* Reset parameters for cross talk suppression function */
839 nau8825_sema_reset(nau8825);
840 nau8825->xtalk_state = NAU8825_XTALK_DONE;
841 nau8825->xtalk_protect = false;
842 }
843
nau8825_readable_reg(struct device * dev,unsigned int reg)844 static bool nau8825_readable_reg(struct device *dev, unsigned int reg)
845 {
846 switch (reg) {
847 case NAU8825_REG_ENA_CTRL ... NAU8825_REG_FLL_VCO_RSV:
848 case NAU8825_REG_HSD_CTRL ... NAU8825_REG_JACK_DET_CTRL:
849 case NAU8825_REG_INTERRUPT_MASK ... NAU8825_REG_KEYDET_CTRL:
850 case NAU8825_REG_VDET_THRESHOLD_1 ... NAU8825_REG_DACR_CTRL:
851 case NAU8825_REG_ADC_DRC_KNEE_IP12 ... NAU8825_REG_ADC_DRC_ATKDCY:
852 case NAU8825_REG_DAC_DRC_KNEE_IP12 ... NAU8825_REG_DAC_DRC_ATKDCY:
853 case NAU8825_REG_IMM_MODE_CTRL ... NAU8825_REG_IMM_RMS_R:
854 case NAU8825_REG_CLASSG_CTRL ... NAU8825_REG_OPT_EFUSE_CTRL:
855 case NAU8825_REG_MISC_CTRL:
856 case NAU8825_REG_I2C_DEVICE_ID ... NAU8825_REG_SARDOUT_RAM_STATUS:
857 case NAU8825_REG_BIAS_ADJ:
858 case NAU8825_REG_TRIM_SETTINGS ... NAU8825_REG_ANALOG_CONTROL_2:
859 case NAU8825_REG_ANALOG_ADC_1 ... NAU8825_REG_MIC_BIAS:
860 case NAU8825_REG_BOOST ... NAU8825_REG_FEPGA:
861 case NAU8825_REG_POWER_UP_CONTROL ... NAU8825_REG_GENERAL_STATUS:
862 return true;
863 default:
864 return false;
865 }
866
867 }
868
nau8825_writeable_reg(struct device * dev,unsigned int reg)869 static bool nau8825_writeable_reg(struct device *dev, unsigned int reg)
870 {
871 switch (reg) {
872 case NAU8825_REG_RESET ... NAU8825_REG_FLL_VCO_RSV:
873 case NAU8825_REG_HSD_CTRL ... NAU8825_REG_JACK_DET_CTRL:
874 case NAU8825_REG_INTERRUPT_MASK:
875 case NAU8825_REG_INT_CLR_KEY_STATUS ... NAU8825_REG_KEYDET_CTRL:
876 case NAU8825_REG_VDET_THRESHOLD_1 ... NAU8825_REG_DACR_CTRL:
877 case NAU8825_REG_ADC_DRC_KNEE_IP12 ... NAU8825_REG_ADC_DRC_ATKDCY:
878 case NAU8825_REG_DAC_DRC_KNEE_IP12 ... NAU8825_REG_DAC_DRC_ATKDCY:
879 case NAU8825_REG_IMM_MODE_CTRL:
880 case NAU8825_REG_CLASSG_CTRL ... NAU8825_REG_OPT_EFUSE_CTRL:
881 case NAU8825_REG_MISC_CTRL:
882 case NAU8825_REG_BIAS_ADJ:
883 case NAU8825_REG_TRIM_SETTINGS ... NAU8825_REG_ANALOG_CONTROL_2:
884 case NAU8825_REG_ANALOG_ADC_1 ... NAU8825_REG_MIC_BIAS:
885 case NAU8825_REG_BOOST ... NAU8825_REG_FEPGA:
886 case NAU8825_REG_POWER_UP_CONTROL ... NAU8825_REG_CHARGE_PUMP:
887 return true;
888 default:
889 return false;
890 }
891 }
892
nau8825_volatile_reg(struct device * dev,unsigned int reg)893 static bool nau8825_volatile_reg(struct device *dev, unsigned int reg)
894 {
895 switch (reg) {
896 case NAU8825_REG_RESET:
897 case NAU8825_REG_IRQ_STATUS:
898 case NAU8825_REG_INT_CLR_KEY_STATUS:
899 case NAU8825_REG_IMM_RMS_L:
900 case NAU8825_REG_IMM_RMS_R:
901 case NAU8825_REG_I2C_DEVICE_ID:
902 case NAU8825_REG_SARDOUT_RAM_STATUS:
903 case NAU8825_REG_CHARGE_PUMP_INPUT_READ:
904 case NAU8825_REG_GENERAL_STATUS:
905 case NAU8825_REG_BIQ_CTRL ... NAU8825_REG_BIQ_COF10:
906 return true;
907 default:
908 return false;
909 }
910 }
911
nau8825_adc_event(struct snd_soc_dapm_widget * w,struct snd_kcontrol * kcontrol,int event)912 static int nau8825_adc_event(struct snd_soc_dapm_widget *w,
913 struct snd_kcontrol *kcontrol, int event)
914 {
915 struct snd_soc_component *component = snd_soc_dapm_to_component(w->dapm);
916 struct nau8825 *nau8825 = snd_soc_component_get_drvdata(component);
917
918 switch (event) {
919 case SND_SOC_DAPM_POST_PMU:
920 msleep(125);
921 regmap_update_bits(nau8825->regmap, NAU8825_REG_ENA_CTRL,
922 NAU8825_ENABLE_ADC, NAU8825_ENABLE_ADC);
923 break;
924 case SND_SOC_DAPM_POST_PMD:
925 if (!nau8825->irq)
926 regmap_update_bits(nau8825->regmap,
927 NAU8825_REG_ENA_CTRL, NAU8825_ENABLE_ADC, 0);
928 break;
929 default:
930 return -EINVAL;
931 }
932
933 return 0;
934 }
935
nau8825_pump_event(struct snd_soc_dapm_widget * w,struct snd_kcontrol * kcontrol,int event)936 static int nau8825_pump_event(struct snd_soc_dapm_widget *w,
937 struct snd_kcontrol *kcontrol, int event)
938 {
939 struct snd_soc_component *component = snd_soc_dapm_to_component(w->dapm);
940 struct nau8825 *nau8825 = snd_soc_component_get_drvdata(component);
941
942 switch (event) {
943 case SND_SOC_DAPM_POST_PMU:
944 /* Prevent startup click by letting charge pump to ramp up */
945 msleep(10);
946 regmap_update_bits(nau8825->regmap, NAU8825_REG_CHARGE_PUMP,
947 NAU8825_JAMNODCLOW, NAU8825_JAMNODCLOW);
948 break;
949 case SND_SOC_DAPM_PRE_PMD:
950 regmap_update_bits(nau8825->regmap, NAU8825_REG_CHARGE_PUMP,
951 NAU8825_JAMNODCLOW, 0);
952 break;
953 default:
954 return -EINVAL;
955 }
956
957 return 0;
958 }
959
nau8825_output_dac_event(struct snd_soc_dapm_widget * w,struct snd_kcontrol * kcontrol,int event)960 static int nau8825_output_dac_event(struct snd_soc_dapm_widget *w,
961 struct snd_kcontrol *kcontrol, int event)
962 {
963 struct snd_soc_component *component = snd_soc_dapm_to_component(w->dapm);
964 struct nau8825 *nau8825 = snd_soc_component_get_drvdata(component);
965
966 switch (event) {
967 case SND_SOC_DAPM_PRE_PMU:
968 /* Disables the TESTDAC to let DAC signal pass through. */
969 regmap_update_bits(nau8825->regmap, NAU8825_REG_BIAS_ADJ,
970 NAU8825_BIAS_TESTDAC_EN, 0);
971 break;
972 case SND_SOC_DAPM_POST_PMD:
973 regmap_update_bits(nau8825->regmap, NAU8825_REG_BIAS_ADJ,
974 NAU8825_BIAS_TESTDAC_EN, NAU8825_BIAS_TESTDAC_EN);
975 break;
976 default:
977 return -EINVAL;
978 }
979
980 return 0;
981 }
982
nau8825_biq_coeff_get(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)983 static int nau8825_biq_coeff_get(struct snd_kcontrol *kcontrol,
984 struct snd_ctl_elem_value *ucontrol)
985 {
986 struct snd_soc_component *component = snd_kcontrol_chip(kcontrol);
987 struct soc_bytes_ext *params = (void *)kcontrol->private_value;
988
989 if (!component->regmap)
990 return -EINVAL;
991
992 regmap_raw_read(component->regmap, NAU8825_REG_BIQ_COF1,
993 ucontrol->value.bytes.data, params->max);
994 return 0;
995 }
996
nau8825_biq_coeff_put(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)997 static int nau8825_biq_coeff_put(struct snd_kcontrol *kcontrol,
998 struct snd_ctl_elem_value *ucontrol)
999 {
1000 struct snd_soc_component *component = snd_kcontrol_chip(kcontrol);
1001 struct soc_bytes_ext *params = (void *)kcontrol->private_value;
1002 void *data;
1003
1004 if (!component->regmap)
1005 return -EINVAL;
1006
1007 data = kmemdup(ucontrol->value.bytes.data,
1008 params->max, GFP_KERNEL | GFP_DMA);
1009 if (!data)
1010 return -ENOMEM;
1011
1012 regmap_update_bits(component->regmap, NAU8825_REG_BIQ_CTRL,
1013 NAU8825_BIQ_WRT_EN, 0);
1014 regmap_raw_write(component->regmap, NAU8825_REG_BIQ_COF1,
1015 data, params->max);
1016 regmap_update_bits(component->regmap, NAU8825_REG_BIQ_CTRL,
1017 NAU8825_BIQ_WRT_EN, NAU8825_BIQ_WRT_EN);
1018
1019 kfree(data);
1020 return 0;
1021 }
1022
1023 static const char * const nau8825_biq_path[] = {
1024 "ADC", "DAC"
1025 };
1026
1027 static const struct soc_enum nau8825_biq_path_enum =
1028 SOC_ENUM_SINGLE(NAU8825_REG_BIQ_CTRL, NAU8825_BIQ_PATH_SFT,
1029 ARRAY_SIZE(nau8825_biq_path), nau8825_biq_path);
1030
1031 static const char * const nau8825_adc_decimation[] = {
1032 "32", "64", "128", "256"
1033 };
1034
1035 static const struct soc_enum nau8825_adc_decimation_enum =
1036 SOC_ENUM_SINGLE(NAU8825_REG_ADC_RATE, NAU8825_ADC_SYNC_DOWN_SFT,
1037 ARRAY_SIZE(nau8825_adc_decimation), nau8825_adc_decimation);
1038
1039 static const char * const nau8825_dac_oversampl[] = {
1040 "64", "256", "128", "", "32"
1041 };
1042
1043 static const struct soc_enum nau8825_dac_oversampl_enum =
1044 SOC_ENUM_SINGLE(NAU8825_REG_DAC_CTRL1, NAU8825_DAC_OVERSAMPLE_SFT,
1045 ARRAY_SIZE(nau8825_dac_oversampl), nau8825_dac_oversampl);
1046
1047 static const DECLARE_TLV_DB_MINMAX_MUTE(adc_vol_tlv, -10300, 2400);
1048 static const DECLARE_TLV_DB_MINMAX_MUTE(sidetone_vol_tlv, -4200, 0);
1049 static const DECLARE_TLV_DB_MINMAX(dac_vol_tlv, -5400, 0);
1050 static const DECLARE_TLV_DB_MINMAX(fepga_gain_tlv, -100, 3600);
1051 static const DECLARE_TLV_DB_MINMAX_MUTE(crosstalk_vol_tlv, -9600, 2400);
1052
1053 static const struct snd_kcontrol_new nau8825_controls[] = {
1054 SOC_SINGLE_TLV("Mic Volume", NAU8825_REG_ADC_DGAIN_CTRL,
1055 0, 0xff, 0, adc_vol_tlv),
1056 SOC_DOUBLE_TLV("Headphone Bypass Volume", NAU8825_REG_ADC_DGAIN_CTRL,
1057 12, 8, 0x0f, 0, sidetone_vol_tlv),
1058 SOC_DOUBLE_TLV("Headphone Volume", NAU8825_REG_HSVOL_CTRL,
1059 6, 0, 0x3f, 1, dac_vol_tlv),
1060 SOC_SINGLE_TLV("Frontend PGA Volume", NAU8825_REG_POWER_UP_CONTROL,
1061 8, 37, 0, fepga_gain_tlv),
1062 SOC_DOUBLE_TLV("Headphone Crosstalk Volume", NAU8825_REG_DAC_DGAIN_CTRL,
1063 0, 8, 0xff, 0, crosstalk_vol_tlv),
1064
1065 SOC_ENUM("ADC Decimation Rate", nau8825_adc_decimation_enum),
1066 SOC_ENUM("DAC Oversampling Rate", nau8825_dac_oversampl_enum),
1067 /* programmable biquad filter */
1068 SOC_ENUM("BIQ Path Select", nau8825_biq_path_enum),
1069 SND_SOC_BYTES_EXT("BIQ Coefficients", 20,
1070 nau8825_biq_coeff_get, nau8825_biq_coeff_put),
1071 };
1072
1073 /* DAC Mux 0x33[9] and 0x34[9] */
1074 static const char * const nau8825_dac_src[] = {
1075 "DACL", "DACR",
1076 };
1077
1078 static SOC_ENUM_SINGLE_DECL(
1079 nau8825_dacl_enum, NAU8825_REG_DACL_CTRL,
1080 NAU8825_DACL_CH_SEL_SFT, nau8825_dac_src);
1081
1082 static SOC_ENUM_SINGLE_DECL(
1083 nau8825_dacr_enum, NAU8825_REG_DACR_CTRL,
1084 NAU8825_DACR_CH_SEL_SFT, nau8825_dac_src);
1085
1086 static const struct snd_kcontrol_new nau8825_dacl_mux =
1087 SOC_DAPM_ENUM("DACL Source", nau8825_dacl_enum);
1088
1089 static const struct snd_kcontrol_new nau8825_dacr_mux =
1090 SOC_DAPM_ENUM("DACR Source", nau8825_dacr_enum);
1091
1092
1093 static const struct snd_soc_dapm_widget nau8825_dapm_widgets[] = {
1094 SND_SOC_DAPM_AIF_OUT("AIFTX", "Capture", 0, NAU8825_REG_I2S_PCM_CTRL2,
1095 15, 1),
1096
1097 SND_SOC_DAPM_INPUT("MIC"),
1098 SND_SOC_DAPM_MICBIAS("MICBIAS", NAU8825_REG_MIC_BIAS, 8, 0),
1099
1100 SND_SOC_DAPM_PGA("Frontend PGA", NAU8825_REG_POWER_UP_CONTROL, 14, 0,
1101 NULL, 0),
1102
1103 SND_SOC_DAPM_ADC_E("ADC", NULL, SND_SOC_NOPM, 0, 0,
1104 nau8825_adc_event, SND_SOC_DAPM_POST_PMU |
1105 SND_SOC_DAPM_POST_PMD),
1106 SND_SOC_DAPM_SUPPLY("ADC Clock", NAU8825_REG_ENA_CTRL, 7, 0, NULL, 0),
1107 SND_SOC_DAPM_SUPPLY("ADC Power", NAU8825_REG_ANALOG_ADC_2, 6, 0, NULL,
1108 0),
1109
1110 /* ADC for button press detection. A dapm supply widget is used to
1111 * prevent dapm_power_widgets keeping the codec at SND_SOC_BIAS_ON
1112 * during suspend.
1113 */
1114 SND_SOC_DAPM_SUPPLY("SAR", NAU8825_REG_SAR_CTRL,
1115 NAU8825_SAR_ADC_EN_SFT, 0, NULL, 0),
1116
1117 SND_SOC_DAPM_PGA_S("ADACL", 2, NAU8825_REG_RDAC, 12, 0, NULL, 0),
1118 SND_SOC_DAPM_PGA_S("ADACR", 2, NAU8825_REG_RDAC, 13, 0, NULL, 0),
1119 SND_SOC_DAPM_PGA_S("ADACL Clock", 3, NAU8825_REG_RDAC, 8, 0, NULL, 0),
1120 SND_SOC_DAPM_PGA_S("ADACR Clock", 3, NAU8825_REG_RDAC, 9, 0, NULL, 0),
1121
1122 SND_SOC_DAPM_DAC("DDACR", NULL, NAU8825_REG_ENA_CTRL,
1123 NAU8825_ENABLE_DACR_SFT, 0),
1124 SND_SOC_DAPM_DAC("DDACL", NULL, NAU8825_REG_ENA_CTRL,
1125 NAU8825_ENABLE_DACL_SFT, 0),
1126 SND_SOC_DAPM_SUPPLY("DDAC Clock", NAU8825_REG_ENA_CTRL, 6, 0, NULL, 0),
1127
1128 SND_SOC_DAPM_MUX("DACL Mux", SND_SOC_NOPM, 0, 0, &nau8825_dacl_mux),
1129 SND_SOC_DAPM_MUX("DACR Mux", SND_SOC_NOPM, 0, 0, &nau8825_dacr_mux),
1130
1131 SND_SOC_DAPM_PGA_S("HP amp L", 0,
1132 NAU8825_REG_CLASSG_CTRL, 1, 0, NULL, 0),
1133 SND_SOC_DAPM_PGA_S("HP amp R", 0,
1134 NAU8825_REG_CLASSG_CTRL, 2, 0, NULL, 0),
1135
1136 SND_SOC_DAPM_PGA_S("Charge Pump", 1, NAU8825_REG_CHARGE_PUMP, 5, 0,
1137 nau8825_pump_event, SND_SOC_DAPM_POST_PMU |
1138 SND_SOC_DAPM_PRE_PMD),
1139
1140 SND_SOC_DAPM_PGA_S("Output Driver R Stage 1", 4,
1141 NAU8825_REG_POWER_UP_CONTROL, 5, 0, NULL, 0),
1142 SND_SOC_DAPM_PGA_S("Output Driver L Stage 1", 4,
1143 NAU8825_REG_POWER_UP_CONTROL, 4, 0, NULL, 0),
1144 SND_SOC_DAPM_PGA_S("Output Driver R Stage 2", 5,
1145 NAU8825_REG_POWER_UP_CONTROL, 3, 0, NULL, 0),
1146 SND_SOC_DAPM_PGA_S("Output Driver L Stage 2", 5,
1147 NAU8825_REG_POWER_UP_CONTROL, 2, 0, NULL, 0),
1148 SND_SOC_DAPM_PGA_S("Output Driver R Stage 3", 6,
1149 NAU8825_REG_POWER_UP_CONTROL, 1, 0, NULL, 0),
1150 SND_SOC_DAPM_PGA_S("Output Driver L Stage 3", 6,
1151 NAU8825_REG_POWER_UP_CONTROL, 0, 0, NULL, 0),
1152
1153 SND_SOC_DAPM_PGA_S("Output DACL", 7,
1154 NAU8825_REG_CHARGE_PUMP, 8, 1, nau8825_output_dac_event,
1155 SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD),
1156 SND_SOC_DAPM_PGA_S("Output DACR", 7,
1157 NAU8825_REG_CHARGE_PUMP, 9, 1, nau8825_output_dac_event,
1158 SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD),
1159
1160 /* HPOL/R are ungrounded by disabling 16 Ohm pull-downs on playback */
1161 SND_SOC_DAPM_PGA_S("HPOL Pulldown", 8,
1162 NAU8825_REG_HSD_CTRL, 0, 1, NULL, 0),
1163 SND_SOC_DAPM_PGA_S("HPOR Pulldown", 8,
1164 NAU8825_REG_HSD_CTRL, 1, 1, NULL, 0),
1165
1166 /* High current HPOL/R boost driver */
1167 SND_SOC_DAPM_PGA_S("HP Boost Driver", 9,
1168 NAU8825_REG_BOOST, 9, 1, NULL, 0),
1169
1170 /* Class G operation control*/
1171 SND_SOC_DAPM_PGA_S("Class G", 10,
1172 NAU8825_REG_CLASSG_CTRL, 0, 0, NULL, 0),
1173
1174 SND_SOC_DAPM_OUTPUT("HPOL"),
1175 SND_SOC_DAPM_OUTPUT("HPOR"),
1176 };
1177
1178 static const struct snd_soc_dapm_route nau8825_dapm_routes[] = {
1179 {"Frontend PGA", NULL, "MIC"},
1180 {"ADC", NULL, "Frontend PGA"},
1181 {"ADC", NULL, "ADC Clock"},
1182 {"ADC", NULL, "ADC Power"},
1183 {"AIFTX", NULL, "ADC"},
1184
1185 {"DDACL", NULL, "Playback"},
1186 {"DDACR", NULL, "Playback"},
1187 {"DDACL", NULL, "DDAC Clock"},
1188 {"DDACR", NULL, "DDAC Clock"},
1189 {"DACL Mux", "DACL", "DDACL"},
1190 {"DACL Mux", "DACR", "DDACR"},
1191 {"DACR Mux", "DACL", "DDACL"},
1192 {"DACR Mux", "DACR", "DDACR"},
1193 {"HP amp L", NULL, "DACL Mux"},
1194 {"HP amp R", NULL, "DACR Mux"},
1195 {"Charge Pump", NULL, "HP amp L"},
1196 {"Charge Pump", NULL, "HP amp R"},
1197 {"ADACL", NULL, "Charge Pump"},
1198 {"ADACR", NULL, "Charge Pump"},
1199 {"ADACL Clock", NULL, "ADACL"},
1200 {"ADACR Clock", NULL, "ADACR"},
1201 {"Output Driver L Stage 1", NULL, "ADACL Clock"},
1202 {"Output Driver R Stage 1", NULL, "ADACR Clock"},
1203 {"Output Driver L Stage 2", NULL, "Output Driver L Stage 1"},
1204 {"Output Driver R Stage 2", NULL, "Output Driver R Stage 1"},
1205 {"Output Driver L Stage 3", NULL, "Output Driver L Stage 2"},
1206 {"Output Driver R Stage 3", NULL, "Output Driver R Stage 2"},
1207 {"Output DACL", NULL, "Output Driver L Stage 3"},
1208 {"Output DACR", NULL, "Output Driver R Stage 3"},
1209 {"HPOL Pulldown", NULL, "Output DACL"},
1210 {"HPOR Pulldown", NULL, "Output DACR"},
1211 {"HP Boost Driver", NULL, "HPOL Pulldown"},
1212 {"HP Boost Driver", NULL, "HPOR Pulldown"},
1213 {"Class G", NULL, "HP Boost Driver"},
1214 {"HPOL", NULL, "Class G"},
1215 {"HPOR", NULL, "Class G"},
1216 };
1217
nau8825_clock_check(struct nau8825 * nau8825,int stream,int rate,int osr)1218 static int nau8825_clock_check(struct nau8825 *nau8825,
1219 int stream, int rate, int osr)
1220 {
1221 int osrate;
1222
1223 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
1224 if (osr >= ARRAY_SIZE(osr_dac_sel))
1225 return -EINVAL;
1226 osrate = osr_dac_sel[osr].osr;
1227 } else {
1228 if (osr >= ARRAY_SIZE(osr_adc_sel))
1229 return -EINVAL;
1230 osrate = osr_adc_sel[osr].osr;
1231 }
1232
1233 if (!osrate || rate * osr > CLK_DA_AD_MAX) {
1234 dev_err(nau8825->dev, "exceed the maximum frequency of CLK_ADC or CLK_DAC\n");
1235 return -EINVAL;
1236 }
1237
1238 return 0;
1239 }
1240
nau8825_hw_params(struct snd_pcm_substream * substream,struct snd_pcm_hw_params * params,struct snd_soc_dai * dai)1241 static int nau8825_hw_params(struct snd_pcm_substream *substream,
1242 struct snd_pcm_hw_params *params,
1243 struct snd_soc_dai *dai)
1244 {
1245 struct snd_soc_component *component = dai->component;
1246 struct nau8825 *nau8825 = snd_soc_component_get_drvdata(component);
1247 unsigned int val_len = 0, osr, ctrl_val, bclk_fs, bclk_div;
1248
1249 nau8825_sema_acquire(nau8825, 3 * HZ);
1250
1251 /* CLK_DAC or CLK_ADC = OSR * FS
1252 * DAC or ADC clock frequency is defined as Over Sampling Rate (OSR)
1253 * multiplied by the audio sample rate (Fs). Note that the OSR and Fs
1254 * values must be selected such that the maximum frequency is less
1255 * than 6.144 MHz.
1256 */
1257 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
1258 regmap_read(nau8825->regmap, NAU8825_REG_DAC_CTRL1, &osr);
1259 osr &= NAU8825_DAC_OVERSAMPLE_MASK;
1260 if (nau8825_clock_check(nau8825, substream->stream,
1261 params_rate(params), osr)) {
1262 nau8825_sema_release(nau8825);
1263 return -EINVAL;
1264 }
1265 regmap_update_bits(nau8825->regmap, NAU8825_REG_CLK_DIVIDER,
1266 NAU8825_CLK_DAC_SRC_MASK,
1267 osr_dac_sel[osr].clk_src << NAU8825_CLK_DAC_SRC_SFT);
1268 } else {
1269 regmap_read(nau8825->regmap, NAU8825_REG_ADC_RATE, &osr);
1270 osr &= NAU8825_ADC_SYNC_DOWN_MASK;
1271 if (nau8825_clock_check(nau8825, substream->stream,
1272 params_rate(params), osr)) {
1273 nau8825_sema_release(nau8825);
1274 return -EINVAL;
1275 }
1276 regmap_update_bits(nau8825->regmap, NAU8825_REG_CLK_DIVIDER,
1277 NAU8825_CLK_ADC_SRC_MASK,
1278 osr_adc_sel[osr].clk_src << NAU8825_CLK_ADC_SRC_SFT);
1279 }
1280
1281 /* make BCLK and LRC divde configuration if the codec as master. */
1282 regmap_read(nau8825->regmap, NAU8825_REG_I2S_PCM_CTRL2, &ctrl_val);
1283 if (ctrl_val & NAU8825_I2S_MS_MASTER) {
1284 /* get the bclk and fs ratio */
1285 bclk_fs = snd_soc_params_to_bclk(params) / params_rate(params);
1286 if (bclk_fs <= 32)
1287 bclk_div = 2;
1288 else if (bclk_fs <= 64)
1289 bclk_div = 1;
1290 else if (bclk_fs <= 128)
1291 bclk_div = 0;
1292 else {
1293 nau8825_sema_release(nau8825);
1294 return -EINVAL;
1295 }
1296 regmap_update_bits(nau8825->regmap, NAU8825_REG_I2S_PCM_CTRL2,
1297 NAU8825_I2S_LRC_DIV_MASK | NAU8825_I2S_BLK_DIV_MASK,
1298 ((bclk_div + 1) << NAU8825_I2S_LRC_DIV_SFT) | bclk_div);
1299 }
1300
1301 switch (params_width(params)) {
1302 case 16:
1303 val_len |= NAU8825_I2S_DL_16;
1304 break;
1305 case 20:
1306 val_len |= NAU8825_I2S_DL_20;
1307 break;
1308 case 24:
1309 val_len |= NAU8825_I2S_DL_24;
1310 break;
1311 case 32:
1312 val_len |= NAU8825_I2S_DL_32;
1313 break;
1314 default:
1315 nau8825_sema_release(nau8825);
1316 return -EINVAL;
1317 }
1318
1319 regmap_update_bits(nau8825->regmap, NAU8825_REG_I2S_PCM_CTRL1,
1320 NAU8825_I2S_DL_MASK, val_len);
1321
1322 /* Release the semaphore. */
1323 nau8825_sema_release(nau8825);
1324
1325 return 0;
1326 }
1327
nau8825_set_dai_fmt(struct snd_soc_dai * codec_dai,unsigned int fmt)1328 static int nau8825_set_dai_fmt(struct snd_soc_dai *codec_dai, unsigned int fmt)
1329 {
1330 struct snd_soc_component *component = codec_dai->component;
1331 struct nau8825 *nau8825 = snd_soc_component_get_drvdata(component);
1332 unsigned int ctrl1_val = 0, ctrl2_val = 0;
1333
1334 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
1335 case SND_SOC_DAIFMT_CBM_CFM:
1336 ctrl2_val |= NAU8825_I2S_MS_MASTER;
1337 break;
1338 case SND_SOC_DAIFMT_CBS_CFS:
1339 break;
1340 default:
1341 return -EINVAL;
1342 }
1343
1344 switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
1345 case SND_SOC_DAIFMT_NB_NF:
1346 break;
1347 case SND_SOC_DAIFMT_IB_NF:
1348 ctrl1_val |= NAU8825_I2S_BP_INV;
1349 break;
1350 default:
1351 return -EINVAL;
1352 }
1353
1354 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
1355 case SND_SOC_DAIFMT_I2S:
1356 ctrl1_val |= NAU8825_I2S_DF_I2S;
1357 break;
1358 case SND_SOC_DAIFMT_LEFT_J:
1359 ctrl1_val |= NAU8825_I2S_DF_LEFT;
1360 break;
1361 case SND_SOC_DAIFMT_RIGHT_J:
1362 ctrl1_val |= NAU8825_I2S_DF_RIGTH;
1363 break;
1364 case SND_SOC_DAIFMT_DSP_A:
1365 ctrl1_val |= NAU8825_I2S_DF_PCM_AB;
1366 break;
1367 case SND_SOC_DAIFMT_DSP_B:
1368 ctrl1_val |= NAU8825_I2S_DF_PCM_AB;
1369 ctrl1_val |= NAU8825_I2S_PCMB_EN;
1370 break;
1371 default:
1372 return -EINVAL;
1373 }
1374
1375 nau8825_sema_acquire(nau8825, 3 * HZ);
1376
1377 regmap_update_bits(nau8825->regmap, NAU8825_REG_I2S_PCM_CTRL1,
1378 NAU8825_I2S_DL_MASK | NAU8825_I2S_DF_MASK |
1379 NAU8825_I2S_BP_MASK | NAU8825_I2S_PCMB_MASK,
1380 ctrl1_val);
1381 regmap_update_bits(nau8825->regmap, NAU8825_REG_I2S_PCM_CTRL2,
1382 NAU8825_I2S_MS_MASK, ctrl2_val);
1383
1384 /* Release the semaphore. */
1385 nau8825_sema_release(nau8825);
1386
1387 return 0;
1388 }
1389
1390 static const struct snd_soc_dai_ops nau8825_dai_ops = {
1391 .hw_params = nau8825_hw_params,
1392 .set_fmt = nau8825_set_dai_fmt,
1393 };
1394
1395 #define NAU8825_RATES SNDRV_PCM_RATE_8000_192000
1396 #define NAU8825_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE \
1397 | SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_S32_LE)
1398
1399 static struct snd_soc_dai_driver nau8825_dai = {
1400 .name = "nau8825-hifi",
1401 .playback = {
1402 .stream_name = "Playback",
1403 .channels_min = 1,
1404 .channels_max = 2,
1405 .rates = NAU8825_RATES,
1406 .formats = NAU8825_FORMATS,
1407 },
1408 .capture = {
1409 .stream_name = "Capture",
1410 .channels_min = 1,
1411 .channels_max = 1,
1412 .rates = NAU8825_RATES,
1413 .formats = NAU8825_FORMATS,
1414 },
1415 .ops = &nau8825_dai_ops,
1416 };
1417
1418 /**
1419 * nau8825_enable_jack_detect - Specify a jack for event reporting
1420 *
1421 * @component: component to register the jack with
1422 * @jack: jack to use to report headset and button events on
1423 *
1424 * After this function has been called the headset insert/remove and button
1425 * events will be routed to the given jack. Jack can be null to stop
1426 * reporting.
1427 */
nau8825_enable_jack_detect(struct snd_soc_component * component,struct snd_soc_jack * jack)1428 int nau8825_enable_jack_detect(struct snd_soc_component *component,
1429 struct snd_soc_jack *jack)
1430 {
1431 struct nau8825 *nau8825 = snd_soc_component_get_drvdata(component);
1432 struct regmap *regmap = nau8825->regmap;
1433
1434 nau8825->jack = jack;
1435
1436 /* Ground HP Outputs[1:0], needed for headset auto detection
1437 * Enable Automatic Mic/Gnd switching reading on insert interrupt[6]
1438 */
1439 regmap_update_bits(regmap, NAU8825_REG_HSD_CTRL,
1440 NAU8825_HSD_AUTO_MODE | NAU8825_SPKR_DWN1R | NAU8825_SPKR_DWN1L,
1441 NAU8825_HSD_AUTO_MODE | NAU8825_SPKR_DWN1R | NAU8825_SPKR_DWN1L);
1442
1443 return 0;
1444 }
1445 EXPORT_SYMBOL_GPL(nau8825_enable_jack_detect);
1446
1447
nau8825_is_jack_inserted(struct regmap * regmap)1448 static bool nau8825_is_jack_inserted(struct regmap *regmap)
1449 {
1450 bool active_high, is_high;
1451 int status, jkdet;
1452
1453 regmap_read(regmap, NAU8825_REG_JACK_DET_CTRL, &jkdet);
1454 active_high = jkdet & NAU8825_JACK_POLARITY;
1455 regmap_read(regmap, NAU8825_REG_I2C_DEVICE_ID, &status);
1456 is_high = status & NAU8825_GPIO2JD1;
1457 /* return jack connection status according to jack insertion logic
1458 * active high or active low.
1459 */
1460 return active_high == is_high;
1461 }
1462
nau8825_restart_jack_detection(struct regmap * regmap)1463 static void nau8825_restart_jack_detection(struct regmap *regmap)
1464 {
1465 /* this will restart the entire jack detection process including MIC/GND
1466 * switching and create interrupts. We have to go from 0 to 1 and back
1467 * to 0 to restart.
1468 */
1469 regmap_update_bits(regmap, NAU8825_REG_JACK_DET_CTRL,
1470 NAU8825_JACK_DET_RESTART, NAU8825_JACK_DET_RESTART);
1471 regmap_update_bits(regmap, NAU8825_REG_JACK_DET_CTRL,
1472 NAU8825_JACK_DET_RESTART, 0);
1473 }
1474
nau8825_int_status_clear_all(struct regmap * regmap)1475 static void nau8825_int_status_clear_all(struct regmap *regmap)
1476 {
1477 int active_irq, clear_irq, i;
1478
1479 /* Reset the intrruption status from rightmost bit if the corres-
1480 * ponding irq event occurs.
1481 */
1482 regmap_read(regmap, NAU8825_REG_IRQ_STATUS, &active_irq);
1483 for (i = 0; i < NAU8825_REG_DATA_LEN; i++) {
1484 clear_irq = (0x1 << i);
1485 if (active_irq & clear_irq)
1486 regmap_write(regmap,
1487 NAU8825_REG_INT_CLR_KEY_STATUS, clear_irq);
1488 }
1489 }
1490
nau8825_eject_jack(struct nau8825 * nau8825)1491 static void nau8825_eject_jack(struct nau8825 *nau8825)
1492 {
1493 struct snd_soc_dapm_context *dapm = nau8825->dapm;
1494 struct regmap *regmap = nau8825->regmap;
1495
1496 /* Force to cancel the cross talk detection process */
1497 nau8825_xtalk_cancel(nau8825);
1498
1499 snd_soc_dapm_disable_pin(dapm, "SAR");
1500 snd_soc_dapm_disable_pin(dapm, "MICBIAS");
1501 /* Detach 2kOhm Resistors from MICBIAS to MICGND1/2 */
1502 regmap_update_bits(regmap, NAU8825_REG_MIC_BIAS,
1503 NAU8825_MICBIAS_JKSLV | NAU8825_MICBIAS_JKR2, 0);
1504 /* ground HPL/HPR, MICGRND1/2 */
1505 regmap_update_bits(regmap, NAU8825_REG_HSD_CTRL, 0xf, 0xf);
1506
1507 snd_soc_dapm_sync(dapm);
1508
1509 /* Clear all interruption status */
1510 nau8825_int_status_clear_all(regmap);
1511
1512 /* Enable the insertion interruption, disable the ejection inter-
1513 * ruption, and then bypass de-bounce circuit.
1514 */
1515 regmap_update_bits(regmap, NAU8825_REG_INTERRUPT_DIS_CTRL,
1516 NAU8825_IRQ_EJECT_DIS | NAU8825_IRQ_INSERT_DIS,
1517 NAU8825_IRQ_EJECT_DIS);
1518 regmap_update_bits(regmap, NAU8825_REG_INTERRUPT_MASK,
1519 NAU8825_IRQ_OUTPUT_EN | NAU8825_IRQ_EJECT_EN |
1520 NAU8825_IRQ_HEADSET_COMPLETE_EN | NAU8825_IRQ_INSERT_EN,
1521 NAU8825_IRQ_OUTPUT_EN | NAU8825_IRQ_EJECT_EN |
1522 NAU8825_IRQ_HEADSET_COMPLETE_EN);
1523 regmap_update_bits(regmap, NAU8825_REG_JACK_DET_CTRL,
1524 NAU8825_JACK_DET_DB_BYPASS, NAU8825_JACK_DET_DB_BYPASS);
1525
1526 /* Disable ADC needed for interruptions at audo mode */
1527 regmap_update_bits(regmap, NAU8825_REG_ENA_CTRL,
1528 NAU8825_ENABLE_ADC, 0);
1529
1530 /* Close clock for jack type detection at manual mode */
1531 nau8825_configure_sysclk(nau8825, NAU8825_CLK_DIS, 0);
1532 }
1533
1534 /* Enable audo mode interruptions with internal clock. */
nau8825_setup_auto_irq(struct nau8825 * nau8825)1535 static void nau8825_setup_auto_irq(struct nau8825 *nau8825)
1536 {
1537 struct regmap *regmap = nau8825->regmap;
1538
1539 /* Enable headset jack type detection complete interruption and
1540 * jack ejection interruption.
1541 */
1542 regmap_update_bits(regmap, NAU8825_REG_INTERRUPT_MASK,
1543 NAU8825_IRQ_HEADSET_COMPLETE_EN | NAU8825_IRQ_EJECT_EN, 0);
1544
1545 /* Enable internal VCO needed for interruptions */
1546 nau8825_configure_sysclk(nau8825, NAU8825_CLK_INTERNAL, 0);
1547
1548 /* Enable ADC needed for interruptions */
1549 regmap_update_bits(regmap, NAU8825_REG_ENA_CTRL,
1550 NAU8825_ENABLE_ADC, NAU8825_ENABLE_ADC);
1551
1552 /* Chip needs one FSCLK cycle in order to generate interruptions,
1553 * as we cannot guarantee one will be provided by the system. Turning
1554 * master mode on then off enables us to generate that FSCLK cycle
1555 * with a minimum of contention on the clock bus.
1556 */
1557 regmap_update_bits(regmap, NAU8825_REG_I2S_PCM_CTRL2,
1558 NAU8825_I2S_MS_MASK, NAU8825_I2S_MS_MASTER);
1559 regmap_update_bits(regmap, NAU8825_REG_I2S_PCM_CTRL2,
1560 NAU8825_I2S_MS_MASK, NAU8825_I2S_MS_SLAVE);
1561
1562 /* Not bypass de-bounce circuit */
1563 regmap_update_bits(regmap, NAU8825_REG_JACK_DET_CTRL,
1564 NAU8825_JACK_DET_DB_BYPASS, 0);
1565
1566 /* Unmask all interruptions */
1567 regmap_write(regmap, NAU8825_REG_INTERRUPT_DIS_CTRL, 0);
1568
1569 /* Restart the jack detection process at auto mode */
1570 nau8825_restart_jack_detection(regmap);
1571 }
1572
nau8825_button_decode(int value)1573 static int nau8825_button_decode(int value)
1574 {
1575 int buttons = 0;
1576
1577 /* The chip supports up to 8 buttons, but ALSA defines only 6 buttons */
1578 if (value & BIT(0))
1579 buttons |= SND_JACK_BTN_0;
1580 if (value & BIT(1))
1581 buttons |= SND_JACK_BTN_1;
1582 if (value & BIT(2))
1583 buttons |= SND_JACK_BTN_2;
1584 if (value & BIT(3))
1585 buttons |= SND_JACK_BTN_3;
1586 if (value & BIT(4))
1587 buttons |= SND_JACK_BTN_4;
1588 if (value & BIT(5))
1589 buttons |= SND_JACK_BTN_5;
1590
1591 return buttons;
1592 }
1593
nau8825_jack_insert(struct nau8825 * nau8825)1594 static int nau8825_jack_insert(struct nau8825 *nau8825)
1595 {
1596 struct regmap *regmap = nau8825->regmap;
1597 struct snd_soc_dapm_context *dapm = nau8825->dapm;
1598 int jack_status_reg, mic_detected;
1599 int type = 0;
1600
1601 regmap_read(regmap, NAU8825_REG_GENERAL_STATUS, &jack_status_reg);
1602 mic_detected = (jack_status_reg >> 10) & 3;
1603 /* The JKSLV and JKR2 all detected in high impedance headset */
1604 if (mic_detected == 0x3)
1605 nau8825->high_imped = true;
1606 else
1607 nau8825->high_imped = false;
1608
1609 switch (mic_detected) {
1610 case 0:
1611 /* no mic */
1612 type = SND_JACK_HEADPHONE;
1613 break;
1614 case 1:
1615 dev_dbg(nau8825->dev, "OMTP (micgnd1) mic connected\n");
1616 type = SND_JACK_HEADSET;
1617
1618 /* Unground MICGND1 */
1619 regmap_update_bits(regmap, NAU8825_REG_HSD_CTRL, 3 << 2,
1620 1 << 2);
1621 /* Attach 2kOhm Resistor from MICBIAS to MICGND1 */
1622 regmap_update_bits(regmap, NAU8825_REG_MIC_BIAS,
1623 NAU8825_MICBIAS_JKSLV | NAU8825_MICBIAS_JKR2,
1624 NAU8825_MICBIAS_JKR2);
1625 /* Attach SARADC to MICGND1 */
1626 regmap_update_bits(regmap, NAU8825_REG_SAR_CTRL,
1627 NAU8825_SAR_INPUT_MASK,
1628 NAU8825_SAR_INPUT_JKR2);
1629
1630 snd_soc_dapm_force_enable_pin(dapm, "MICBIAS");
1631 snd_soc_dapm_force_enable_pin(dapm, "SAR");
1632 snd_soc_dapm_sync(dapm);
1633 break;
1634 case 2:
1635 dev_dbg(nau8825->dev, "CTIA (micgnd2) mic connected\n");
1636 type = SND_JACK_HEADSET;
1637
1638 /* Unground MICGND2 */
1639 regmap_update_bits(regmap, NAU8825_REG_HSD_CTRL, 3 << 2,
1640 2 << 2);
1641 /* Attach 2kOhm Resistor from MICBIAS to MICGND2 */
1642 regmap_update_bits(regmap, NAU8825_REG_MIC_BIAS,
1643 NAU8825_MICBIAS_JKSLV | NAU8825_MICBIAS_JKR2,
1644 NAU8825_MICBIAS_JKSLV);
1645 /* Attach SARADC to MICGND2 */
1646 regmap_update_bits(regmap, NAU8825_REG_SAR_CTRL,
1647 NAU8825_SAR_INPUT_MASK,
1648 NAU8825_SAR_INPUT_JKSLV);
1649
1650 snd_soc_dapm_force_enable_pin(dapm, "MICBIAS");
1651 snd_soc_dapm_force_enable_pin(dapm, "SAR");
1652 snd_soc_dapm_sync(dapm);
1653 break;
1654 case 3:
1655 /* detect error case */
1656 dev_err(nau8825->dev, "detection error; disable mic function\n");
1657 type = SND_JACK_HEADPHONE;
1658 break;
1659 }
1660
1661 /* Leaving HPOL/R grounded after jack insert by default. They will be
1662 * ungrounded as part of the widget power up sequence at the beginning
1663 * of playback to reduce pop.
1664 */
1665 return type;
1666 }
1667
1668 #define NAU8825_BUTTONS (SND_JACK_BTN_0 | SND_JACK_BTN_1 | \
1669 SND_JACK_BTN_2 | SND_JACK_BTN_3)
1670
nau8825_interrupt(int irq,void * data)1671 static irqreturn_t nau8825_interrupt(int irq, void *data)
1672 {
1673 struct nau8825 *nau8825 = (struct nau8825 *)data;
1674 struct regmap *regmap = nau8825->regmap;
1675 int active_irq, clear_irq = 0, event = 0, event_mask = 0;
1676
1677 if (regmap_read(regmap, NAU8825_REG_IRQ_STATUS, &active_irq)) {
1678 dev_err(nau8825->dev, "failed to read irq status\n");
1679 return IRQ_NONE;
1680 }
1681
1682 if ((active_irq & NAU8825_JACK_EJECTION_IRQ_MASK) ==
1683 NAU8825_JACK_EJECTION_DETECTED) {
1684
1685 nau8825_eject_jack(nau8825);
1686 event_mask |= SND_JACK_HEADSET;
1687 clear_irq = NAU8825_JACK_EJECTION_IRQ_MASK;
1688 } else if (active_irq & NAU8825_KEY_SHORT_PRESS_IRQ) {
1689 int key_status;
1690
1691 regmap_read(regmap, NAU8825_REG_INT_CLR_KEY_STATUS,
1692 &key_status);
1693
1694 /* upper 8 bits of the register are for short pressed keys,
1695 * lower 8 bits - for long pressed buttons
1696 */
1697 nau8825->button_pressed = nau8825_button_decode(
1698 key_status >> 8);
1699
1700 event |= nau8825->button_pressed;
1701 event_mask |= NAU8825_BUTTONS;
1702 clear_irq = NAU8825_KEY_SHORT_PRESS_IRQ;
1703 } else if (active_irq & NAU8825_KEY_RELEASE_IRQ) {
1704 event_mask = NAU8825_BUTTONS;
1705 clear_irq = NAU8825_KEY_RELEASE_IRQ;
1706 } else if (active_irq & NAU8825_HEADSET_COMPLETION_IRQ) {
1707 if (nau8825_is_jack_inserted(regmap)) {
1708 event |= nau8825_jack_insert(nau8825);
1709 if (nau8825->xtalk_enable && !nau8825->high_imped) {
1710 /* Apply the cross talk suppression in the
1711 * headset without high impedance.
1712 */
1713 if (!nau8825->xtalk_protect) {
1714 /* Raise protection for cross talk de-
1715 * tection if no protection before.
1716 * The driver has to cancel the pro-
1717 * cess and restore changes if process
1718 * is ongoing when ejection.
1719 */
1720 int ret;
1721 nau8825->xtalk_protect = true;
1722 ret = nau8825_sema_acquire(nau8825, 0);
1723 if (ret)
1724 nau8825->xtalk_protect = false;
1725 }
1726 /* Startup cross talk detection process */
1727 if (nau8825->xtalk_protect) {
1728 nau8825->xtalk_state =
1729 NAU8825_XTALK_PREPARE;
1730 schedule_work(&nau8825->xtalk_work);
1731 }
1732 } else {
1733 /* The cross talk suppression shouldn't apply
1734 * in the headset with high impedance. Thus,
1735 * relieve the protection raised before.
1736 */
1737 if (nau8825->xtalk_protect) {
1738 nau8825_sema_release(nau8825);
1739 nau8825->xtalk_protect = false;
1740 }
1741 }
1742 } else {
1743 dev_warn(nau8825->dev, "Headset completion IRQ fired but no headset connected\n");
1744 nau8825_eject_jack(nau8825);
1745 }
1746
1747 event_mask |= SND_JACK_HEADSET;
1748 clear_irq = NAU8825_HEADSET_COMPLETION_IRQ;
1749 /* Record the interruption report event for driver to report
1750 * the event later. The jack report will delay until cross
1751 * talk detection process is done.
1752 */
1753 if (nau8825->xtalk_state == NAU8825_XTALK_PREPARE) {
1754 nau8825->xtalk_event = event;
1755 nau8825->xtalk_event_mask = event_mask;
1756 }
1757 } else if (active_irq & NAU8825_IMPEDANCE_MEAS_IRQ) {
1758 /* crosstalk detection enable and process on going */
1759 if (nau8825->xtalk_enable && nau8825->xtalk_protect)
1760 schedule_work(&nau8825->xtalk_work);
1761 clear_irq = NAU8825_IMPEDANCE_MEAS_IRQ;
1762 } else if ((active_irq & NAU8825_JACK_INSERTION_IRQ_MASK) ==
1763 NAU8825_JACK_INSERTION_DETECTED) {
1764 /* One more step to check GPIO status directly. Thus, the
1765 * driver can confirm the real insertion interruption because
1766 * the intrruption at manual mode has bypassed debounce
1767 * circuit which can get rid of unstable status.
1768 */
1769 if (nau8825_is_jack_inserted(regmap)) {
1770 /* Turn off insertion interruption at manual mode */
1771 regmap_update_bits(regmap,
1772 NAU8825_REG_INTERRUPT_DIS_CTRL,
1773 NAU8825_IRQ_INSERT_DIS,
1774 NAU8825_IRQ_INSERT_DIS);
1775 regmap_update_bits(regmap, NAU8825_REG_INTERRUPT_MASK,
1776 NAU8825_IRQ_INSERT_EN, NAU8825_IRQ_INSERT_EN);
1777 /* Enable interruption for jack type detection at audo
1778 * mode which can detect microphone and jack type.
1779 */
1780 nau8825_setup_auto_irq(nau8825);
1781 }
1782 }
1783
1784 if (!clear_irq)
1785 clear_irq = active_irq;
1786 /* clears the rightmost interruption */
1787 regmap_write(regmap, NAU8825_REG_INT_CLR_KEY_STATUS, clear_irq);
1788
1789 /* Delay jack report until cross talk detection is done. It can avoid
1790 * application to do playback preparation when cross talk detection
1791 * process is still working. Otherwise, the resource like clock and
1792 * power will be issued by them at the same time and conflict happens.
1793 */
1794 if (event_mask && nau8825->xtalk_state == NAU8825_XTALK_DONE)
1795 snd_soc_jack_report(nau8825->jack, event, event_mask);
1796
1797 return IRQ_HANDLED;
1798 }
1799
nau8825_setup_buttons(struct nau8825 * nau8825)1800 static void nau8825_setup_buttons(struct nau8825 *nau8825)
1801 {
1802 struct regmap *regmap = nau8825->regmap;
1803
1804 regmap_update_bits(regmap, NAU8825_REG_SAR_CTRL,
1805 NAU8825_SAR_TRACKING_GAIN_MASK,
1806 nau8825->sar_voltage << NAU8825_SAR_TRACKING_GAIN_SFT);
1807 regmap_update_bits(regmap, NAU8825_REG_SAR_CTRL,
1808 NAU8825_SAR_COMPARE_TIME_MASK,
1809 nau8825->sar_compare_time << NAU8825_SAR_COMPARE_TIME_SFT);
1810 regmap_update_bits(regmap, NAU8825_REG_SAR_CTRL,
1811 NAU8825_SAR_SAMPLING_TIME_MASK,
1812 nau8825->sar_sampling_time << NAU8825_SAR_SAMPLING_TIME_SFT);
1813
1814 regmap_update_bits(regmap, NAU8825_REG_KEYDET_CTRL,
1815 NAU8825_KEYDET_LEVELS_NR_MASK,
1816 (nau8825->sar_threshold_num - 1) << NAU8825_KEYDET_LEVELS_NR_SFT);
1817 regmap_update_bits(regmap, NAU8825_REG_KEYDET_CTRL,
1818 NAU8825_KEYDET_HYSTERESIS_MASK,
1819 nau8825->sar_hysteresis << NAU8825_KEYDET_HYSTERESIS_SFT);
1820 regmap_update_bits(regmap, NAU8825_REG_KEYDET_CTRL,
1821 NAU8825_KEYDET_SHORTKEY_DEBOUNCE_MASK,
1822 nau8825->key_debounce << NAU8825_KEYDET_SHORTKEY_DEBOUNCE_SFT);
1823
1824 regmap_write(regmap, NAU8825_REG_VDET_THRESHOLD_1,
1825 (nau8825->sar_threshold[0] << 8) | nau8825->sar_threshold[1]);
1826 regmap_write(regmap, NAU8825_REG_VDET_THRESHOLD_2,
1827 (nau8825->sar_threshold[2] << 8) | nau8825->sar_threshold[3]);
1828 regmap_write(regmap, NAU8825_REG_VDET_THRESHOLD_3,
1829 (nau8825->sar_threshold[4] << 8) | nau8825->sar_threshold[5]);
1830 regmap_write(regmap, NAU8825_REG_VDET_THRESHOLD_4,
1831 (nau8825->sar_threshold[6] << 8) | nau8825->sar_threshold[7]);
1832
1833 /* Enable short press and release interruptions */
1834 regmap_update_bits(regmap, NAU8825_REG_INTERRUPT_MASK,
1835 NAU8825_IRQ_KEY_SHORT_PRESS_EN | NAU8825_IRQ_KEY_RELEASE_EN,
1836 0);
1837 }
1838
nau8825_init_regs(struct nau8825 * nau8825)1839 static void nau8825_init_regs(struct nau8825 *nau8825)
1840 {
1841 struct regmap *regmap = nau8825->regmap;
1842
1843 /* Latch IIC LSB value */
1844 regmap_write(regmap, NAU8825_REG_IIC_ADDR_SET, 0x0001);
1845 /* Enable Bias/Vmid */
1846 regmap_update_bits(nau8825->regmap, NAU8825_REG_BIAS_ADJ,
1847 NAU8825_BIAS_VMID, NAU8825_BIAS_VMID);
1848 regmap_update_bits(nau8825->regmap, NAU8825_REG_BOOST,
1849 NAU8825_GLOBAL_BIAS_EN, NAU8825_GLOBAL_BIAS_EN);
1850
1851 /* VMID Tieoff */
1852 regmap_update_bits(regmap, NAU8825_REG_BIAS_ADJ,
1853 NAU8825_BIAS_VMID_SEL_MASK,
1854 nau8825->vref_impedance << NAU8825_BIAS_VMID_SEL_SFT);
1855 /* Disable Boost Driver, Automatic Short circuit protection enable */
1856 regmap_update_bits(regmap, NAU8825_REG_BOOST,
1857 NAU8825_PRECHARGE_DIS | NAU8825_HP_BOOST_DIS |
1858 NAU8825_HP_BOOST_G_DIS | NAU8825_SHORT_SHUTDOWN_EN,
1859 NAU8825_PRECHARGE_DIS | NAU8825_HP_BOOST_DIS |
1860 NAU8825_HP_BOOST_G_DIS | NAU8825_SHORT_SHUTDOWN_EN);
1861
1862 regmap_update_bits(regmap, NAU8825_REG_GPIO12_CTRL,
1863 NAU8825_JKDET_OUTPUT_EN,
1864 nau8825->jkdet_enable ? 0 : NAU8825_JKDET_OUTPUT_EN);
1865 regmap_update_bits(regmap, NAU8825_REG_GPIO12_CTRL,
1866 NAU8825_JKDET_PULL_EN,
1867 nau8825->jkdet_pull_enable ? 0 : NAU8825_JKDET_PULL_EN);
1868 regmap_update_bits(regmap, NAU8825_REG_GPIO12_CTRL,
1869 NAU8825_JKDET_PULL_UP,
1870 nau8825->jkdet_pull_up ? NAU8825_JKDET_PULL_UP : 0);
1871 regmap_update_bits(regmap, NAU8825_REG_JACK_DET_CTRL,
1872 NAU8825_JACK_POLARITY,
1873 /* jkdet_polarity - 1 is for active-low */
1874 nau8825->jkdet_polarity ? 0 : NAU8825_JACK_POLARITY);
1875
1876 regmap_update_bits(regmap, NAU8825_REG_JACK_DET_CTRL,
1877 NAU8825_JACK_INSERT_DEBOUNCE_MASK,
1878 nau8825->jack_insert_debounce << NAU8825_JACK_INSERT_DEBOUNCE_SFT);
1879 regmap_update_bits(regmap, NAU8825_REG_JACK_DET_CTRL,
1880 NAU8825_JACK_EJECT_DEBOUNCE_MASK,
1881 nau8825->jack_eject_debounce << NAU8825_JACK_EJECT_DEBOUNCE_SFT);
1882
1883 /* Pull up IRQ pin */
1884 regmap_update_bits(regmap, NAU8825_REG_INTERRUPT_MASK,
1885 NAU8825_IRQ_PIN_PULLUP | NAU8825_IRQ_PIN_PULL_EN,
1886 NAU8825_IRQ_PIN_PULLUP | NAU8825_IRQ_PIN_PULL_EN);
1887 /* Mask unneeded IRQs: 1 - disable, 0 - enable */
1888 regmap_update_bits(regmap, NAU8825_REG_INTERRUPT_MASK, 0x7ff, 0x7ff);
1889
1890 regmap_update_bits(regmap, NAU8825_REG_MIC_BIAS,
1891 NAU8825_MICBIAS_VOLTAGE_MASK, nau8825->micbias_voltage);
1892
1893 if (nau8825->sar_threshold_num)
1894 nau8825_setup_buttons(nau8825);
1895
1896 /* Default oversampling/decimations settings are unusable
1897 * (audible hiss). Set it to something better.
1898 */
1899 regmap_update_bits(regmap, NAU8825_REG_ADC_RATE,
1900 NAU8825_ADC_SYNC_DOWN_MASK | NAU8825_ADC_SINC4_EN,
1901 NAU8825_ADC_SYNC_DOWN_64);
1902 regmap_update_bits(regmap, NAU8825_REG_DAC_CTRL1,
1903 NAU8825_DAC_OVERSAMPLE_MASK, NAU8825_DAC_OVERSAMPLE_64);
1904 /* Disable DACR/L power */
1905 regmap_update_bits(regmap, NAU8825_REG_CHARGE_PUMP,
1906 NAU8825_POWER_DOWN_DACR | NAU8825_POWER_DOWN_DACL,
1907 NAU8825_POWER_DOWN_DACR | NAU8825_POWER_DOWN_DACL);
1908 /* Enable TESTDAC. This sets the analog DAC inputs to a '0' input
1909 * signal to avoid any glitches due to power up transients in both
1910 * the analog and digital DAC circuit.
1911 */
1912 regmap_update_bits(nau8825->regmap, NAU8825_REG_BIAS_ADJ,
1913 NAU8825_BIAS_TESTDAC_EN, NAU8825_BIAS_TESTDAC_EN);
1914 /* CICCLP off */
1915 regmap_update_bits(regmap, NAU8825_REG_DAC_CTRL1,
1916 NAU8825_DAC_CLIP_OFF, NAU8825_DAC_CLIP_OFF);
1917
1918 /* Class AB bias current to 2x, DAC Capacitor enable MSB/LSB */
1919 regmap_update_bits(regmap, NAU8825_REG_ANALOG_CONTROL_2,
1920 NAU8825_HP_NON_CLASSG_CURRENT_2xADJ |
1921 NAU8825_DAC_CAPACITOR_MSB | NAU8825_DAC_CAPACITOR_LSB,
1922 NAU8825_HP_NON_CLASSG_CURRENT_2xADJ |
1923 NAU8825_DAC_CAPACITOR_MSB | NAU8825_DAC_CAPACITOR_LSB);
1924 /* Class G timer 64ms */
1925 regmap_update_bits(regmap, NAU8825_REG_CLASSG_CTRL,
1926 NAU8825_CLASSG_TIMER_MASK,
1927 0x20 << NAU8825_CLASSG_TIMER_SFT);
1928 /* DAC clock delay 2ns, VREF */
1929 regmap_update_bits(regmap, NAU8825_REG_RDAC,
1930 NAU8825_RDAC_CLK_DELAY_MASK | NAU8825_RDAC_VREF_MASK,
1931 (0x2 << NAU8825_RDAC_CLK_DELAY_SFT) |
1932 (0x3 << NAU8825_RDAC_VREF_SFT));
1933 /* Config L/R channel */
1934 regmap_update_bits(nau8825->regmap, NAU8825_REG_DACL_CTRL,
1935 NAU8825_DACL_CH_SEL_MASK, NAU8825_DACL_CH_SEL_L);
1936 regmap_update_bits(nau8825->regmap, NAU8825_REG_DACR_CTRL,
1937 NAU8825_DACL_CH_SEL_MASK, NAU8825_DACL_CH_SEL_R);
1938 /* Disable short Frame Sync detection logic */
1939 regmap_update_bits(regmap, NAU8825_REG_LEFT_TIME_SLOT,
1940 NAU8825_DIS_FS_SHORT_DET, NAU8825_DIS_FS_SHORT_DET);
1941 }
1942
1943 static const struct regmap_config nau8825_regmap_config = {
1944 .val_bits = NAU8825_REG_DATA_LEN,
1945 .reg_bits = NAU8825_REG_ADDR_LEN,
1946
1947 .max_register = NAU8825_REG_MAX,
1948 .readable_reg = nau8825_readable_reg,
1949 .writeable_reg = nau8825_writeable_reg,
1950 .volatile_reg = nau8825_volatile_reg,
1951
1952 .cache_type = REGCACHE_RBTREE,
1953 .reg_defaults = nau8825_reg_defaults,
1954 .num_reg_defaults = ARRAY_SIZE(nau8825_reg_defaults),
1955 };
1956
nau8825_component_probe(struct snd_soc_component * component)1957 static int nau8825_component_probe(struct snd_soc_component *component)
1958 {
1959 struct nau8825 *nau8825 = snd_soc_component_get_drvdata(component);
1960 struct snd_soc_dapm_context *dapm = snd_soc_component_get_dapm(component);
1961
1962 nau8825->dapm = dapm;
1963
1964 return 0;
1965 }
1966
nau8825_component_remove(struct snd_soc_component * component)1967 static void nau8825_component_remove(struct snd_soc_component *component)
1968 {
1969 struct nau8825 *nau8825 = snd_soc_component_get_drvdata(component);
1970
1971 /* Cancel and reset cross tak suppresstion detection funciton */
1972 nau8825_xtalk_cancel(nau8825);
1973 }
1974
1975 /**
1976 * nau8825_calc_fll_param - Calculate FLL parameters.
1977 * @fll_in: external clock provided to codec.
1978 * @fs: sampling rate.
1979 * @fll_param: Pointer to structure of FLL parameters.
1980 *
1981 * Calculate FLL parameters to configure codec.
1982 *
1983 * Returns 0 for success or negative error code.
1984 */
nau8825_calc_fll_param(unsigned int fll_in,unsigned int fs,struct nau8825_fll * fll_param)1985 static int nau8825_calc_fll_param(unsigned int fll_in, unsigned int fs,
1986 struct nau8825_fll *fll_param)
1987 {
1988 u64 fvco, fvco_max;
1989 unsigned int fref, i, fvco_sel;
1990
1991 /* Ensure the reference clock frequency (FREF) is <= 13.5MHz by dividing
1992 * freq_in by 1, 2, 4, or 8 using FLL pre-scalar.
1993 * FREF = freq_in / NAU8825_FLL_REF_DIV_MASK
1994 */
1995 for (i = 0; i < ARRAY_SIZE(fll_pre_scalar); i++) {
1996 fref = fll_in / fll_pre_scalar[i].param;
1997 if (fref <= NAU_FREF_MAX)
1998 break;
1999 }
2000 if (i == ARRAY_SIZE(fll_pre_scalar))
2001 return -EINVAL;
2002 fll_param->clk_ref_div = fll_pre_scalar[i].val;
2003
2004 /* Choose the FLL ratio based on FREF */
2005 for (i = 0; i < ARRAY_SIZE(fll_ratio); i++) {
2006 if (fref >= fll_ratio[i].param)
2007 break;
2008 }
2009 if (i == ARRAY_SIZE(fll_ratio))
2010 return -EINVAL;
2011 fll_param->ratio = fll_ratio[i].val;
2012
2013 /* Calculate the frequency of DCO (FDCO) given freq_out = 256 * Fs.
2014 * FDCO must be within the 90MHz - 124MHz or the FFL cannot be
2015 * guaranteed across the full range of operation.
2016 * FDCO = freq_out * 2 * mclk_src_scaling
2017 */
2018 fvco_max = 0;
2019 fvco_sel = ARRAY_SIZE(mclk_src_scaling);
2020 for (i = 0; i < ARRAY_SIZE(mclk_src_scaling); i++) {
2021 fvco = 256ULL * fs * 2 * mclk_src_scaling[i].param;
2022 if (fvco > NAU_FVCO_MIN && fvco < NAU_FVCO_MAX &&
2023 fvco_max < fvco) {
2024 fvco_max = fvco;
2025 fvco_sel = i;
2026 }
2027 }
2028 if (ARRAY_SIZE(mclk_src_scaling) == fvco_sel)
2029 return -EINVAL;
2030 fll_param->mclk_src = mclk_src_scaling[fvco_sel].val;
2031
2032 /* Calculate the FLL 10-bit integer input and the FLL 16-bit fractional
2033 * input based on FDCO, FREF and FLL ratio.
2034 */
2035 fvco = div_u64(fvco_max << 16, fref * fll_param->ratio);
2036 fll_param->fll_int = (fvco >> 16) & 0x3FF;
2037 fll_param->fll_frac = fvco & 0xFFFF;
2038 return 0;
2039 }
2040
nau8825_fll_apply(struct nau8825 * nau8825,struct nau8825_fll * fll_param)2041 static void nau8825_fll_apply(struct nau8825 *nau8825,
2042 struct nau8825_fll *fll_param)
2043 {
2044 regmap_update_bits(nau8825->regmap, NAU8825_REG_CLK_DIVIDER,
2045 NAU8825_CLK_SRC_MASK | NAU8825_CLK_MCLK_SRC_MASK,
2046 NAU8825_CLK_SRC_MCLK | fll_param->mclk_src);
2047 /* Make DSP operate at high speed for better performance. */
2048 regmap_update_bits(nau8825->regmap, NAU8825_REG_FLL1,
2049 NAU8825_FLL_RATIO_MASK | NAU8825_ICTRL_LATCH_MASK,
2050 fll_param->ratio | (0x6 << NAU8825_ICTRL_LATCH_SFT));
2051 /* FLL 16-bit fractional input */
2052 regmap_write(nau8825->regmap, NAU8825_REG_FLL2, fll_param->fll_frac);
2053 /* FLL 10-bit integer input */
2054 regmap_update_bits(nau8825->regmap, NAU8825_REG_FLL3,
2055 NAU8825_FLL_INTEGER_MASK, fll_param->fll_int);
2056 /* FLL pre-scaler */
2057 regmap_update_bits(nau8825->regmap, NAU8825_REG_FLL4,
2058 NAU8825_FLL_REF_DIV_MASK,
2059 fll_param->clk_ref_div << NAU8825_FLL_REF_DIV_SFT);
2060 /* select divided VCO input */
2061 regmap_update_bits(nau8825->regmap, NAU8825_REG_FLL5,
2062 NAU8825_FLL_CLK_SW_MASK, NAU8825_FLL_CLK_SW_REF);
2063 /* Disable free-running mode */
2064 regmap_update_bits(nau8825->regmap,
2065 NAU8825_REG_FLL6, NAU8825_DCO_EN, 0);
2066 if (fll_param->fll_frac) {
2067 /* set FLL loop filter enable and cutoff frequency at 500Khz */
2068 regmap_update_bits(nau8825->regmap, NAU8825_REG_FLL5,
2069 NAU8825_FLL_PDB_DAC_EN | NAU8825_FLL_LOOP_FTR_EN |
2070 NAU8825_FLL_FTR_SW_MASK,
2071 NAU8825_FLL_PDB_DAC_EN | NAU8825_FLL_LOOP_FTR_EN |
2072 NAU8825_FLL_FTR_SW_FILTER);
2073 regmap_update_bits(nau8825->regmap, NAU8825_REG_FLL6,
2074 NAU8825_SDM_EN | NAU8825_CUTOFF500,
2075 NAU8825_SDM_EN | NAU8825_CUTOFF500);
2076 } else {
2077 /* disable FLL loop filter and cutoff frequency */
2078 regmap_update_bits(nau8825->regmap, NAU8825_REG_FLL5,
2079 NAU8825_FLL_PDB_DAC_EN | NAU8825_FLL_LOOP_FTR_EN |
2080 NAU8825_FLL_FTR_SW_MASK, NAU8825_FLL_FTR_SW_ACCU);
2081 regmap_update_bits(nau8825->regmap, NAU8825_REG_FLL6,
2082 NAU8825_SDM_EN | NAU8825_CUTOFF500, 0);
2083 }
2084 }
2085
2086 /* freq_out must be 256*Fs in order to achieve the best performance */
nau8825_set_pll(struct snd_soc_component * component,int pll_id,int source,unsigned int freq_in,unsigned int freq_out)2087 static int nau8825_set_pll(struct snd_soc_component *component, int pll_id, int source,
2088 unsigned int freq_in, unsigned int freq_out)
2089 {
2090 struct nau8825 *nau8825 = snd_soc_component_get_drvdata(component);
2091 struct nau8825_fll fll_param;
2092 int ret, fs;
2093
2094 fs = freq_out / 256;
2095 ret = nau8825_calc_fll_param(freq_in, fs, &fll_param);
2096 if (ret < 0) {
2097 dev_err(component->dev, "Unsupported input clock %d\n", freq_in);
2098 return ret;
2099 }
2100 dev_dbg(component->dev, "mclk_src=%x ratio=%x fll_frac=%x fll_int=%x clk_ref_div=%x\n",
2101 fll_param.mclk_src, fll_param.ratio, fll_param.fll_frac,
2102 fll_param.fll_int, fll_param.clk_ref_div);
2103
2104 nau8825_fll_apply(nau8825, &fll_param);
2105 mdelay(2);
2106 regmap_update_bits(nau8825->regmap, NAU8825_REG_CLK_DIVIDER,
2107 NAU8825_CLK_SRC_MASK, NAU8825_CLK_SRC_VCO);
2108 return 0;
2109 }
2110
nau8825_mclk_prepare(struct nau8825 * nau8825,unsigned int freq)2111 static int nau8825_mclk_prepare(struct nau8825 *nau8825, unsigned int freq)
2112 {
2113 int ret = 0;
2114
2115 nau8825->mclk = devm_clk_get(nau8825->dev, "mclk");
2116 if (IS_ERR(nau8825->mclk)) {
2117 dev_info(nau8825->dev, "No 'mclk' clock found, assume MCLK is managed externally");
2118 return 0;
2119 }
2120
2121 if (!nau8825->mclk_freq) {
2122 ret = clk_prepare_enable(nau8825->mclk);
2123 if (ret) {
2124 dev_err(nau8825->dev, "Unable to prepare codec mclk\n");
2125 return ret;
2126 }
2127 }
2128
2129 if (nau8825->mclk_freq != freq) {
2130 freq = clk_round_rate(nau8825->mclk, freq);
2131 ret = clk_set_rate(nau8825->mclk, freq);
2132 if (ret) {
2133 dev_err(nau8825->dev, "Unable to set mclk rate\n");
2134 return ret;
2135 }
2136 nau8825->mclk_freq = freq;
2137 }
2138
2139 return 0;
2140 }
2141
nau8825_configure_mclk_as_sysclk(struct regmap * regmap)2142 static void nau8825_configure_mclk_as_sysclk(struct regmap *regmap)
2143 {
2144 regmap_update_bits(regmap, NAU8825_REG_CLK_DIVIDER,
2145 NAU8825_CLK_SRC_MASK, NAU8825_CLK_SRC_MCLK);
2146 regmap_update_bits(regmap, NAU8825_REG_FLL6,
2147 NAU8825_DCO_EN, 0);
2148 /* Make DSP operate as default setting for power saving. */
2149 regmap_update_bits(regmap, NAU8825_REG_FLL1,
2150 NAU8825_ICTRL_LATCH_MASK, 0);
2151 }
2152
nau8825_configure_sysclk(struct nau8825 * nau8825,int clk_id,unsigned int freq)2153 static int nau8825_configure_sysclk(struct nau8825 *nau8825, int clk_id,
2154 unsigned int freq)
2155 {
2156 struct regmap *regmap = nau8825->regmap;
2157 int ret;
2158
2159 switch (clk_id) {
2160 case NAU8825_CLK_DIS:
2161 /* Clock provided externally and disable internal VCO clock */
2162 nau8825_configure_mclk_as_sysclk(regmap);
2163 if (nau8825->mclk_freq) {
2164 clk_disable_unprepare(nau8825->mclk);
2165 nau8825->mclk_freq = 0;
2166 }
2167
2168 break;
2169 case NAU8825_CLK_MCLK:
2170 /* Acquire the semaphore to synchronize the playback and
2171 * interrupt handler. In order to avoid the playback inter-
2172 * fered by cross talk process, the driver make the playback
2173 * preparation halted until cross talk process finish.
2174 */
2175 nau8825_sema_acquire(nau8825, 3 * HZ);
2176 nau8825_configure_mclk_as_sysclk(regmap);
2177 /* MCLK not changed by clock tree */
2178 regmap_update_bits(regmap, NAU8825_REG_CLK_DIVIDER,
2179 NAU8825_CLK_MCLK_SRC_MASK, 0);
2180 /* Release the semaphore. */
2181 nau8825_sema_release(nau8825);
2182
2183 ret = nau8825_mclk_prepare(nau8825, freq);
2184 if (ret)
2185 return ret;
2186
2187 break;
2188 case NAU8825_CLK_INTERNAL:
2189 if (nau8825_is_jack_inserted(nau8825->regmap)) {
2190 regmap_update_bits(regmap, NAU8825_REG_FLL6,
2191 NAU8825_DCO_EN, NAU8825_DCO_EN);
2192 regmap_update_bits(regmap, NAU8825_REG_CLK_DIVIDER,
2193 NAU8825_CLK_SRC_MASK, NAU8825_CLK_SRC_VCO);
2194 /* Decrease the VCO frequency and make DSP operate
2195 * as default setting for power saving.
2196 */
2197 regmap_update_bits(regmap, NAU8825_REG_CLK_DIVIDER,
2198 NAU8825_CLK_MCLK_SRC_MASK, 0xf);
2199 regmap_update_bits(regmap, NAU8825_REG_FLL1,
2200 NAU8825_ICTRL_LATCH_MASK |
2201 NAU8825_FLL_RATIO_MASK, 0x10);
2202 regmap_update_bits(regmap, NAU8825_REG_FLL6,
2203 NAU8825_SDM_EN, NAU8825_SDM_EN);
2204 } else {
2205 /* The clock turns off intentionally for power saving
2206 * when no headset connected.
2207 */
2208 nau8825_configure_mclk_as_sysclk(regmap);
2209 dev_warn(nau8825->dev, "Disable clock for power saving when no headset connected\n");
2210 }
2211 if (nau8825->mclk_freq) {
2212 clk_disable_unprepare(nau8825->mclk);
2213 nau8825->mclk_freq = 0;
2214 }
2215
2216 break;
2217 case NAU8825_CLK_FLL_MCLK:
2218 /* Acquire the semaphore to synchronize the playback and
2219 * interrupt handler. In order to avoid the playback inter-
2220 * fered by cross talk process, the driver make the playback
2221 * preparation halted until cross talk process finish.
2222 */
2223 nau8825_sema_acquire(nau8825, 3 * HZ);
2224 /* Higher FLL reference input frequency can only set lower
2225 * gain error, such as 0000 for input reference from MCLK
2226 * 12.288Mhz.
2227 */
2228 regmap_update_bits(regmap, NAU8825_REG_FLL3,
2229 NAU8825_FLL_CLK_SRC_MASK | NAU8825_GAIN_ERR_MASK,
2230 NAU8825_FLL_CLK_SRC_MCLK | 0);
2231 /* Release the semaphore. */
2232 nau8825_sema_release(nau8825);
2233
2234 ret = nau8825_mclk_prepare(nau8825, freq);
2235 if (ret)
2236 return ret;
2237
2238 break;
2239 case NAU8825_CLK_FLL_BLK:
2240 /* Acquire the semaphore to synchronize the playback and
2241 * interrupt handler. In order to avoid the playback inter-
2242 * fered by cross talk process, the driver make the playback
2243 * preparation halted until cross talk process finish.
2244 */
2245 nau8825_sema_acquire(nau8825, 3 * HZ);
2246 /* If FLL reference input is from low frequency source,
2247 * higher error gain can apply such as 0xf which has
2248 * the most sensitive gain error correction threshold,
2249 * Therefore, FLL has the most accurate DCO to
2250 * target frequency.
2251 */
2252 regmap_update_bits(regmap, NAU8825_REG_FLL3,
2253 NAU8825_FLL_CLK_SRC_MASK | NAU8825_GAIN_ERR_MASK,
2254 NAU8825_FLL_CLK_SRC_BLK |
2255 (0xf << NAU8825_GAIN_ERR_SFT));
2256 /* Release the semaphore. */
2257 nau8825_sema_release(nau8825);
2258
2259 if (nau8825->mclk_freq) {
2260 clk_disable_unprepare(nau8825->mclk);
2261 nau8825->mclk_freq = 0;
2262 }
2263
2264 break;
2265 case NAU8825_CLK_FLL_FS:
2266 /* Acquire the semaphore to synchronize the playback and
2267 * interrupt handler. In order to avoid the playback inter-
2268 * fered by cross talk process, the driver make the playback
2269 * preparation halted until cross talk process finish.
2270 */
2271 nau8825_sema_acquire(nau8825, 3 * HZ);
2272 /* If FLL reference input is from low frequency source,
2273 * higher error gain can apply such as 0xf which has
2274 * the most sensitive gain error correction threshold,
2275 * Therefore, FLL has the most accurate DCO to
2276 * target frequency.
2277 */
2278 regmap_update_bits(regmap, NAU8825_REG_FLL3,
2279 NAU8825_FLL_CLK_SRC_MASK | NAU8825_GAIN_ERR_MASK,
2280 NAU8825_FLL_CLK_SRC_FS |
2281 (0xf << NAU8825_GAIN_ERR_SFT));
2282 /* Release the semaphore. */
2283 nau8825_sema_release(nau8825);
2284
2285 if (nau8825->mclk_freq) {
2286 clk_disable_unprepare(nau8825->mclk);
2287 nau8825->mclk_freq = 0;
2288 }
2289
2290 break;
2291 default:
2292 dev_err(nau8825->dev, "Invalid clock id (%d)\n", clk_id);
2293 return -EINVAL;
2294 }
2295
2296 dev_dbg(nau8825->dev, "Sysclk is %dHz and clock id is %d\n", freq,
2297 clk_id);
2298 return 0;
2299 }
2300
nau8825_set_sysclk(struct snd_soc_component * component,int clk_id,int source,unsigned int freq,int dir)2301 static int nau8825_set_sysclk(struct snd_soc_component *component, int clk_id,
2302 int source, unsigned int freq, int dir)
2303 {
2304 struct nau8825 *nau8825 = snd_soc_component_get_drvdata(component);
2305
2306 return nau8825_configure_sysclk(nau8825, clk_id, freq);
2307 }
2308
nau8825_resume_setup(struct nau8825 * nau8825)2309 static int nau8825_resume_setup(struct nau8825 *nau8825)
2310 {
2311 struct regmap *regmap = nau8825->regmap;
2312
2313 /* Close clock when jack type detection at manual mode */
2314 nau8825_configure_sysclk(nau8825, NAU8825_CLK_DIS, 0);
2315
2316 /* Clear all interruption status */
2317 nau8825_int_status_clear_all(regmap);
2318
2319 /* Enable both insertion and ejection interruptions, and then
2320 * bypass de-bounce circuit.
2321 */
2322 regmap_update_bits(regmap, NAU8825_REG_INTERRUPT_MASK,
2323 NAU8825_IRQ_OUTPUT_EN | NAU8825_IRQ_HEADSET_COMPLETE_EN |
2324 NAU8825_IRQ_EJECT_EN | NAU8825_IRQ_INSERT_EN,
2325 NAU8825_IRQ_OUTPUT_EN | NAU8825_IRQ_HEADSET_COMPLETE_EN);
2326 regmap_update_bits(regmap, NAU8825_REG_JACK_DET_CTRL,
2327 NAU8825_JACK_DET_DB_BYPASS, NAU8825_JACK_DET_DB_BYPASS);
2328 regmap_update_bits(regmap, NAU8825_REG_INTERRUPT_DIS_CTRL,
2329 NAU8825_IRQ_INSERT_DIS | NAU8825_IRQ_EJECT_DIS, 0);
2330
2331 return 0;
2332 }
2333
nau8825_set_bias_level(struct snd_soc_component * component,enum snd_soc_bias_level level)2334 static int nau8825_set_bias_level(struct snd_soc_component *component,
2335 enum snd_soc_bias_level level)
2336 {
2337 struct nau8825 *nau8825 = snd_soc_component_get_drvdata(component);
2338 int ret;
2339
2340 switch (level) {
2341 case SND_SOC_BIAS_ON:
2342 break;
2343
2344 case SND_SOC_BIAS_PREPARE:
2345 break;
2346
2347 case SND_SOC_BIAS_STANDBY:
2348 if (snd_soc_component_get_bias_level(component) == SND_SOC_BIAS_OFF) {
2349 if (nau8825->mclk_freq) {
2350 ret = clk_prepare_enable(nau8825->mclk);
2351 if (ret) {
2352 dev_err(nau8825->dev, "Unable to prepare component mclk\n");
2353 return ret;
2354 }
2355 }
2356 /* Setup codec configuration after resume */
2357 nau8825_resume_setup(nau8825);
2358 }
2359 break;
2360
2361 case SND_SOC_BIAS_OFF:
2362 /* Reset the configuration of jack type for detection */
2363 /* Detach 2kOhm Resistors from MICBIAS to MICGND1/2 */
2364 regmap_update_bits(nau8825->regmap, NAU8825_REG_MIC_BIAS,
2365 NAU8825_MICBIAS_JKSLV | NAU8825_MICBIAS_JKR2, 0);
2366 /* ground HPL/HPR, MICGRND1/2 */
2367 regmap_update_bits(nau8825->regmap,
2368 NAU8825_REG_HSD_CTRL, 0xf, 0xf);
2369 /* Cancel and reset cross talk detection funciton */
2370 nau8825_xtalk_cancel(nau8825);
2371 /* Turn off all interruptions before system shutdown. Keep the
2372 * interruption quiet before resume setup completes.
2373 */
2374 regmap_write(nau8825->regmap,
2375 NAU8825_REG_INTERRUPT_DIS_CTRL, 0xffff);
2376 /* Disable ADC needed for interruptions at audo mode */
2377 regmap_update_bits(nau8825->regmap, NAU8825_REG_ENA_CTRL,
2378 NAU8825_ENABLE_ADC, 0);
2379 if (nau8825->mclk_freq)
2380 clk_disable_unprepare(nau8825->mclk);
2381 break;
2382 }
2383 return 0;
2384 }
2385
nau8825_suspend(struct snd_soc_component * component)2386 static int __maybe_unused nau8825_suspend(struct snd_soc_component *component)
2387 {
2388 struct nau8825 *nau8825 = snd_soc_component_get_drvdata(component);
2389
2390 disable_irq(nau8825->irq);
2391 snd_soc_component_force_bias_level(component, SND_SOC_BIAS_OFF);
2392 /* Power down codec power; don't suppoet button wakeup */
2393 snd_soc_dapm_disable_pin(nau8825->dapm, "SAR");
2394 snd_soc_dapm_disable_pin(nau8825->dapm, "MICBIAS");
2395 snd_soc_dapm_sync(nau8825->dapm);
2396 regcache_cache_only(nau8825->regmap, true);
2397 regcache_mark_dirty(nau8825->regmap);
2398
2399 return 0;
2400 }
2401
nau8825_resume(struct snd_soc_component * component)2402 static int __maybe_unused nau8825_resume(struct snd_soc_component *component)
2403 {
2404 struct nau8825 *nau8825 = snd_soc_component_get_drvdata(component);
2405 int ret;
2406
2407 regcache_cache_only(nau8825->regmap, false);
2408 regcache_sync(nau8825->regmap);
2409 nau8825->xtalk_protect = true;
2410 ret = nau8825_sema_acquire(nau8825, 0);
2411 if (ret)
2412 nau8825->xtalk_protect = false;
2413 enable_irq(nau8825->irq);
2414
2415 return 0;
2416 }
2417
2418 static const struct snd_soc_component_driver nau8825_component_driver = {
2419 .probe = nau8825_component_probe,
2420 .remove = nau8825_component_remove,
2421 .set_sysclk = nau8825_set_sysclk,
2422 .set_pll = nau8825_set_pll,
2423 .set_bias_level = nau8825_set_bias_level,
2424 .suspend = nau8825_suspend,
2425 .resume = nau8825_resume,
2426 .controls = nau8825_controls,
2427 .num_controls = ARRAY_SIZE(nau8825_controls),
2428 .dapm_widgets = nau8825_dapm_widgets,
2429 .num_dapm_widgets = ARRAY_SIZE(nau8825_dapm_widgets),
2430 .dapm_routes = nau8825_dapm_routes,
2431 .num_dapm_routes = ARRAY_SIZE(nau8825_dapm_routes),
2432 .suspend_bias_off = 1,
2433 .idle_bias_on = 1,
2434 .use_pmdown_time = 1,
2435 .endianness = 1,
2436 .non_legacy_dai_naming = 1,
2437 };
2438
nau8825_reset_chip(struct regmap * regmap)2439 static void nau8825_reset_chip(struct regmap *regmap)
2440 {
2441 regmap_write(regmap, NAU8825_REG_RESET, 0x00);
2442 regmap_write(regmap, NAU8825_REG_RESET, 0x00);
2443 }
2444
nau8825_print_device_properties(struct nau8825 * nau8825)2445 static void nau8825_print_device_properties(struct nau8825 *nau8825)
2446 {
2447 int i;
2448 struct device *dev = nau8825->dev;
2449
2450 dev_dbg(dev, "jkdet-enable: %d\n", nau8825->jkdet_enable);
2451 dev_dbg(dev, "jkdet-pull-enable: %d\n", nau8825->jkdet_pull_enable);
2452 dev_dbg(dev, "jkdet-pull-up: %d\n", nau8825->jkdet_pull_up);
2453 dev_dbg(dev, "jkdet-polarity: %d\n", nau8825->jkdet_polarity);
2454 dev_dbg(dev, "micbias-voltage: %d\n", nau8825->micbias_voltage);
2455 dev_dbg(dev, "vref-impedance: %d\n", nau8825->vref_impedance);
2456
2457 dev_dbg(dev, "sar-threshold-num: %d\n", nau8825->sar_threshold_num);
2458 for (i = 0; i < nau8825->sar_threshold_num; i++)
2459 dev_dbg(dev, "sar-threshold[%d]=%d\n", i,
2460 nau8825->sar_threshold[i]);
2461
2462 dev_dbg(dev, "sar-hysteresis: %d\n", nau8825->sar_hysteresis);
2463 dev_dbg(dev, "sar-voltage: %d\n", nau8825->sar_voltage);
2464 dev_dbg(dev, "sar-compare-time: %d\n", nau8825->sar_compare_time);
2465 dev_dbg(dev, "sar-sampling-time: %d\n", nau8825->sar_sampling_time);
2466 dev_dbg(dev, "short-key-debounce: %d\n", nau8825->key_debounce);
2467 dev_dbg(dev, "jack-insert-debounce: %d\n",
2468 nau8825->jack_insert_debounce);
2469 dev_dbg(dev, "jack-eject-debounce: %d\n",
2470 nau8825->jack_eject_debounce);
2471 dev_dbg(dev, "crosstalk-enable: %d\n",
2472 nau8825->xtalk_enable);
2473 }
2474
nau8825_read_device_properties(struct device * dev,struct nau8825 * nau8825)2475 static int nau8825_read_device_properties(struct device *dev,
2476 struct nau8825 *nau8825) {
2477 int ret;
2478
2479 nau8825->jkdet_enable = device_property_read_bool(dev,
2480 "nuvoton,jkdet-enable");
2481 nau8825->jkdet_pull_enable = device_property_read_bool(dev,
2482 "nuvoton,jkdet-pull-enable");
2483 nau8825->jkdet_pull_up = device_property_read_bool(dev,
2484 "nuvoton,jkdet-pull-up");
2485 ret = device_property_read_u32(dev, "nuvoton,jkdet-polarity",
2486 &nau8825->jkdet_polarity);
2487 if (ret)
2488 nau8825->jkdet_polarity = 1;
2489 ret = device_property_read_u32(dev, "nuvoton,micbias-voltage",
2490 &nau8825->micbias_voltage);
2491 if (ret)
2492 nau8825->micbias_voltage = 6;
2493 ret = device_property_read_u32(dev, "nuvoton,vref-impedance",
2494 &nau8825->vref_impedance);
2495 if (ret)
2496 nau8825->vref_impedance = 2;
2497 ret = device_property_read_u32(dev, "nuvoton,sar-threshold-num",
2498 &nau8825->sar_threshold_num);
2499 if (ret)
2500 nau8825->sar_threshold_num = 4;
2501 ret = device_property_read_u32_array(dev, "nuvoton,sar-threshold",
2502 nau8825->sar_threshold, nau8825->sar_threshold_num);
2503 if (ret) {
2504 nau8825->sar_threshold[0] = 0x08;
2505 nau8825->sar_threshold[1] = 0x12;
2506 nau8825->sar_threshold[2] = 0x26;
2507 nau8825->sar_threshold[3] = 0x73;
2508 }
2509 ret = device_property_read_u32(dev, "nuvoton,sar-hysteresis",
2510 &nau8825->sar_hysteresis);
2511 if (ret)
2512 nau8825->sar_hysteresis = 0;
2513 ret = device_property_read_u32(dev, "nuvoton,sar-voltage",
2514 &nau8825->sar_voltage);
2515 if (ret)
2516 nau8825->sar_voltage = 6;
2517 ret = device_property_read_u32(dev, "nuvoton,sar-compare-time",
2518 &nau8825->sar_compare_time);
2519 if (ret)
2520 nau8825->sar_compare_time = 1;
2521 ret = device_property_read_u32(dev, "nuvoton,sar-sampling-time",
2522 &nau8825->sar_sampling_time);
2523 if (ret)
2524 nau8825->sar_sampling_time = 1;
2525 ret = device_property_read_u32(dev, "nuvoton,short-key-debounce",
2526 &nau8825->key_debounce);
2527 if (ret)
2528 nau8825->key_debounce = 3;
2529 ret = device_property_read_u32(dev, "nuvoton,jack-insert-debounce",
2530 &nau8825->jack_insert_debounce);
2531 if (ret)
2532 nau8825->jack_insert_debounce = 7;
2533 ret = device_property_read_u32(dev, "nuvoton,jack-eject-debounce",
2534 &nau8825->jack_eject_debounce);
2535 if (ret)
2536 nau8825->jack_eject_debounce = 0;
2537 nau8825->xtalk_enable = device_property_read_bool(dev,
2538 "nuvoton,crosstalk-enable");
2539
2540 nau8825->mclk = devm_clk_get(dev, "mclk");
2541 if (PTR_ERR(nau8825->mclk) == -EPROBE_DEFER) {
2542 return -EPROBE_DEFER;
2543 } else if (PTR_ERR(nau8825->mclk) == -ENOENT) {
2544 /* The MCLK is managed externally or not used at all */
2545 nau8825->mclk = NULL;
2546 dev_info(dev, "No 'mclk' clock found, assume MCLK is managed externally");
2547 } else if (IS_ERR(nau8825->mclk)) {
2548 return -EINVAL;
2549 }
2550
2551 return 0;
2552 }
2553
nau8825_setup_irq(struct nau8825 * nau8825)2554 static int nau8825_setup_irq(struct nau8825 *nau8825)
2555 {
2556 int ret;
2557
2558 ret = devm_request_threaded_irq(nau8825->dev, nau8825->irq, NULL,
2559 nau8825_interrupt, IRQF_TRIGGER_LOW | IRQF_ONESHOT,
2560 "nau8825", nau8825);
2561
2562 if (ret) {
2563 dev_err(nau8825->dev, "Cannot request irq %d (%d)\n",
2564 nau8825->irq, ret);
2565 return ret;
2566 }
2567
2568 return 0;
2569 }
2570
nau8825_i2c_probe(struct i2c_client * i2c,const struct i2c_device_id * id)2571 static int nau8825_i2c_probe(struct i2c_client *i2c,
2572 const struct i2c_device_id *id)
2573 {
2574 struct device *dev = &i2c->dev;
2575 struct nau8825 *nau8825 = dev_get_platdata(&i2c->dev);
2576 int ret, value;
2577
2578 if (!nau8825) {
2579 nau8825 = devm_kzalloc(dev, sizeof(*nau8825), GFP_KERNEL);
2580 if (!nau8825)
2581 return -ENOMEM;
2582 ret = nau8825_read_device_properties(dev, nau8825);
2583 if (ret)
2584 return ret;
2585 }
2586
2587 i2c_set_clientdata(i2c, nau8825);
2588
2589 nau8825->regmap = devm_regmap_init_i2c(i2c, &nau8825_regmap_config);
2590 if (IS_ERR(nau8825->regmap))
2591 return PTR_ERR(nau8825->regmap);
2592 nau8825->dev = dev;
2593 nau8825->irq = i2c->irq;
2594 /* Initiate parameters, semaphore and work queue which are needed in
2595 * cross talk suppression measurment function.
2596 */
2597 nau8825->xtalk_state = NAU8825_XTALK_DONE;
2598 nau8825->xtalk_protect = false;
2599 nau8825->xtalk_baktab_initialized = false;
2600 sema_init(&nau8825->xtalk_sem, 1);
2601 INIT_WORK(&nau8825->xtalk_work, nau8825_xtalk_work);
2602
2603 nau8825_print_device_properties(nau8825);
2604
2605 nau8825_reset_chip(nau8825->regmap);
2606 ret = regmap_read(nau8825->regmap, NAU8825_REG_I2C_DEVICE_ID, &value);
2607 if (ret < 0) {
2608 dev_err(dev, "Failed to read device id from the NAU8825: %d\n",
2609 ret);
2610 return ret;
2611 }
2612 if ((value & NAU8825_SOFTWARE_ID_MASK) !=
2613 NAU8825_SOFTWARE_ID_NAU8825) {
2614 dev_err(dev, "Not a NAU8825 chip\n");
2615 return -ENODEV;
2616 }
2617
2618 nau8825_init_regs(nau8825);
2619
2620 if (i2c->irq)
2621 nau8825_setup_irq(nau8825);
2622
2623 return devm_snd_soc_register_component(&i2c->dev,
2624 &nau8825_component_driver,
2625 &nau8825_dai, 1);
2626 }
2627
nau8825_i2c_remove(struct i2c_client * client)2628 static int nau8825_i2c_remove(struct i2c_client *client)
2629 {
2630 return 0;
2631 }
2632
2633 static const struct i2c_device_id nau8825_i2c_ids[] = {
2634 { "nau8825", 0 },
2635 { }
2636 };
2637 MODULE_DEVICE_TABLE(i2c, nau8825_i2c_ids);
2638
2639 #ifdef CONFIG_OF
2640 static const struct of_device_id nau8825_of_ids[] = {
2641 { .compatible = "nuvoton,nau8825", },
2642 {}
2643 };
2644 MODULE_DEVICE_TABLE(of, nau8825_of_ids);
2645 #endif
2646
2647 #ifdef CONFIG_ACPI
2648 static const struct acpi_device_id nau8825_acpi_match[] = {
2649 { "10508825", 0 },
2650 {},
2651 };
2652 MODULE_DEVICE_TABLE(acpi, nau8825_acpi_match);
2653 #endif
2654
2655 static struct i2c_driver nau8825_driver = {
2656 .driver = {
2657 .name = "nau8825",
2658 .of_match_table = of_match_ptr(nau8825_of_ids),
2659 .acpi_match_table = ACPI_PTR(nau8825_acpi_match),
2660 },
2661 .probe = nau8825_i2c_probe,
2662 .remove = nau8825_i2c_remove,
2663 .id_table = nau8825_i2c_ids,
2664 };
2665 module_i2c_driver(nau8825_driver);
2666
2667 MODULE_DESCRIPTION("ASoC nau8825 driver");
2668 MODULE_AUTHOR("Anatol Pomozov <anatol@chromium.org>");
2669 MODULE_LICENSE("GPL");
2670
