1 // SPDX-License-Identifier: GPL-2.0-only
2 //
3 // nau8325.c -- Nuvoton NAU8325 audio codec driver
4 //
5 // Copyright 2023 Nuvoton Technology Crop.
6 // Author: Seven Lee <WTLI@nuvoton.com>
7 // David Lin <CTLIN0@nuvoton.com>
8 //
9
10 #include <linux/clk.h>
11 #include <linux/delay.h>
12 #include <linux/init.h>
13 #include <linux/i2c.h>
14 #include <linux/module.h>
15 #include <linux/regmap.h>
16 #include <linux/slab.h>
17 #include <sound/core.h>
18 #include <sound/initval.h>
19 #include <sound/pcm.h>
20 #include <sound/pcm_params.h>
21 #include <sound/soc.h>
22 #include <sound/tlv.h>
23 #include "nau8325.h"
24
25 /* Range of Master Clock MCLK (Hz) */
26 #define MASTER_CLK_MAX 49152000
27 #define MASTER_CLK_MIN 2048000
28
29 /* scaling for MCLK source */
30 #define CLK_PROC_BYPASS (-1)
31
32 /* the maximum CLK_DAC */
33 #define CLK_DA_AD_MAX 6144000
34
35 /* from MCLK input */
36 #define MCLK_SRC 4
37
38 static const struct nau8325_src_attr mclk_n1_div[] = {
39 { 1, 0x0 },
40 { 2, 0x1 },
41 { 3, 0x2 },
42 };
43
44 /* over sampling rate */
45 static const struct nau8325_osr_attr osr_dac_sel[] = {
46 { 64, 2 }, /* OSR 64, SRC 1/4 */
47 { 256, 0 }, /* OSR 256, SRC 1 */
48 { 128, 1 }, /* OSR 128, SRC 1/2 */
49 { 0, 0 },
50 { 32, 3 }, /* OSR 32, SRC 1/8 */
51 };
52
53 static const struct nau8325_src_attr mclk_n2_div[] = {
54 { 0, 0x0 },
55 { 1, 0x1 },
56 { 2, 0x2 },
57 { 3, 0x3 },
58 { 4, 0x4 },
59 };
60
61 static const struct nau8325_src_attr mclk_n3_mult[] = {
62 { 0, 0x1 },
63 { 1, 0x2 },
64 { 2, 0x3 },
65 { 3, 0x4 },
66 };
67
68 /* Sample Rate and MCLK_SRC selections */
69 static const struct nau8325_srate_attr target_srate_table[] = {
70 /* { FS, range, max, { MCLK source }} */
71 { 48000, 2, true, { 12288000, 19200000, 24000000 } },
72 { 16000, 1, false, { 4096000, 6400000, 8000000 } },
73 { 8000, 0, false, { 2048000, 3200000, 4000000 }},
74 { 44100, 2, true, { 11289600, 17640000, 22050000 }},
75 { 64000, 3, false, { 16384000, 25600000, 32000000 } },
76 { 96000, 3, true, { 24576000, 38400000, 48000000 } },
77 { 12000, 0, true, { 3072000, 4800000, 6000000 } },
78 { 24000, 1, true, { 6144000, 9600000, 12000000 } },
79 { 32000, 2, false, { 8192000, 12800000, 16000000 } },
80 };
81
82 static const struct reg_default nau8325_reg_defaults[] = {
83 { NAU8325_R00_HARDWARE_RST, 0x0000 },
84 { NAU8325_R01_SOFTWARE_RST, 0x0000 },
85 { NAU8325_R03_CLK_CTRL, 0x0000 },
86 { NAU8325_R04_ENA_CTRL, 0x0000 },
87 { NAU8325_R05_INTERRUPT_CTRL, 0x007f },
88 { NAU8325_R09_IRQOUT, 0x0000 },
89 { NAU8325_R0A_IO_CTRL, 0x0000 },
90 { NAU8325_R0B_PDM_CTRL, 0x0000 },
91 { NAU8325_R0C_TDM_CTRL, 0x0000 },
92 { NAU8325_R0D_I2S_PCM_CTRL1, 0x000a },
93 { NAU8325_R0E_I2S_PCM_CTRL2, 0x0000 },
94 { NAU8325_R0F_L_TIME_SLOT, 0x0000 },
95 { NAU8325_R10_R_TIME_SLOT, 0x0000 },
96 { NAU8325_R11_HPF_CTRL, 0x0000 },
97 { NAU8325_R12_MUTE_CTRL, 0x0000 },
98 { NAU8325_R13_DAC_VOLUME, 0xf3f3 },
99 { NAU8325_R29_DAC_CTRL1, 0x0081 },
100 { NAU8325_R2A_DAC_CTRL2, 0x0000 },
101 { NAU8325_R2C_ALC_CTRL1, 0x000e },
102 { NAU8325_R2D_ALC_CTRL2, 0x8400 },
103 { NAU8325_R2E_ALC_CTRL3, 0x0000 },
104 { NAU8325_R2F_ALC_CTRL4, 0x003f },
105 { NAU8325_R40_CLK_DET_CTRL, 0xa801 },
106 { NAU8325_R50_MIXER_CTRL, 0x0000 },
107 { NAU8325_R55_MISC_CTRL, 0x0000 },
108 { NAU8325_R60_BIAS_ADJ, 0x0000 },
109 { NAU8325_R61_ANALOG_CONTROL_1, 0x0000 },
110 { NAU8325_R62_ANALOG_CONTROL_2, 0x0000 },
111 { NAU8325_R63_ANALOG_CONTROL_3, 0x0000 },
112 { NAU8325_R64_ANALOG_CONTROL_4, 0x0000 },
113 { NAU8325_R65_ANALOG_CONTROL_5, 0x0000 },
114 { NAU8325_R66_ANALOG_CONTROL_6, 0x0000 },
115 { NAU8325_R69_CLIP_CTRL, 0x0000 },
116 { NAU8325_R73_RDAC, 0x0008 },
117 };
118
nau8325_readable_reg(struct device * dev,unsigned int reg)119 static bool nau8325_readable_reg(struct device *dev, unsigned int reg)
120 {
121 switch (reg) {
122 case NAU8325_R02_DEVICE_ID ... NAU8325_R06_INT_CLR_STATUS:
123 case NAU8325_R09_IRQOUT ... NAU8325_R13_DAC_VOLUME:
124 case NAU8325_R1D_DEBUG_READ1:
125 case NAU8325_R1F_DEBUG_READ2:
126 case NAU8325_R22_DEBUG_READ3:
127 case NAU8325_R29_DAC_CTRL1 ... NAU8325_R2A_DAC_CTRL2:
128 case NAU8325_R2C_ALC_CTRL1 ... NAU8325_R2F_ALC_CTRL4:
129 case NAU8325_R40_CLK_DET_CTRL:
130 case NAU8325_R49_TEST_STATUS ... NAU8325_R4A_ANALOG_READ:
131 case NAU8325_R50_MIXER_CTRL:
132 case NAU8325_R55_MISC_CTRL:
133 case NAU8325_R60_BIAS_ADJ ... NAU8325_R66_ANALOG_CONTROL_6:
134 case NAU8325_R69_CLIP_CTRL:
135 case NAU8325_R73_RDAC:
136 return true;
137 default:
138 return false;
139 }
140 }
141
nau8325_writeable_reg(struct device * dev,unsigned int reg)142 static bool nau8325_writeable_reg(struct device *dev, unsigned int reg)
143 {
144 switch (reg) {
145 case NAU8325_R00_HARDWARE_RST:
146 case NAU8325_R03_CLK_CTRL ... NAU8325_R06_INT_CLR_STATUS:
147 case NAU8325_R09_IRQOUT ... NAU8325_R13_DAC_VOLUME:
148 case NAU8325_R29_DAC_CTRL1 ... NAU8325_R2A_DAC_CTRL2:
149 case NAU8325_R2C_ALC_CTRL1 ... NAU8325_R2F_ALC_CTRL4:
150 case NAU8325_R40_CLK_DET_CTRL:
151 case NAU8325_R50_MIXER_CTRL:
152 case NAU8325_R55_MISC_CTRL:
153 case NAU8325_R60_BIAS_ADJ ... NAU8325_R66_ANALOG_CONTROL_6:
154 case NAU8325_R69_CLIP_CTRL:
155 case NAU8325_R73_RDAC:
156 return true;
157 default:
158 return false;
159 }
160 }
161
nau8325_volatile_reg(struct device * dev,unsigned int reg)162 static bool nau8325_volatile_reg(struct device *dev, unsigned int reg)
163 {
164 switch (reg) {
165 case NAU8325_R00_HARDWARE_RST ... NAU8325_R02_DEVICE_ID:
166 case NAU8325_R06_INT_CLR_STATUS:
167 case NAU8325_R1D_DEBUG_READ1:
168 case NAU8325_R1F_DEBUG_READ2:
169 case NAU8325_R22_DEBUG_READ3:
170 case NAU8325_R4A_ANALOG_READ:
171 return true;
172 default:
173 return false;
174 }
175 }
176
177 static const char * const nau8325_dac_oversampl_texts[] = {
178 "64", "256", "128", "32",
179 };
180
181 static const unsigned int nau8325_dac_oversampl_values[] = {
182 0, 1, 2, 4,
183 };
184
185 static const struct soc_enum nau8325_dac_oversampl_enum =
186 SOC_VALUE_ENUM_SINGLE(NAU8325_R29_DAC_CTRL1,
187 NAU8325_DAC_OVERSAMPLE_SFT, 0x7,
188 ARRAY_SIZE(nau8325_dac_oversampl_texts),
189 nau8325_dac_oversampl_texts,
190 nau8325_dac_oversampl_values);
191
192 static const DECLARE_TLV_DB_MINMAX_MUTE(dac_vol_tlv, -8000, 600);
193
194 static const struct snd_kcontrol_new nau8325_snd_controls[] = {
195 SOC_ENUM("DAC Oversampling Rate", nau8325_dac_oversampl_enum),
196 SOC_DOUBLE_TLV("Speaker Volume", NAU8325_R13_DAC_VOLUME,
197 NAU8325_DAC_VOLUME_L_SFT, NAU8325_DAC_VOLUME_R_SFT,
198 NAU8325_DAC_VOLUME_R_EN, 0, dac_vol_tlv),
199 SOC_SINGLE("ALC Max Gain", NAU8325_R2C_ALC_CTRL1,
200 NAU8325_ALC_MAXGAIN_SFT, NAU8325_ALC_MAXGAIN_MAX, 0),
201 SOC_SINGLE("ALC Min Gain", NAU8325_R2C_ALC_CTRL1,
202 NAU8325_ALC_MINGAIN_SFT, NAU8325_ALC_MINGAIN_MAX, 0),
203 SOC_SINGLE("ALC Decay Timer", NAU8325_R2D_ALC_CTRL2,
204 NAU8325_ALC_DCY_SFT, NAU8325_ALC_DCY_MAX, 0),
205 SOC_SINGLE("ALC Attack Timer", NAU8325_R2D_ALC_CTRL2,
206 NAU8325_ALC_ATK_SFT, NAU8325_ALC_ATK_MAX, 0),
207 SOC_SINGLE("ALC Hold Time", NAU8325_R2D_ALC_CTRL2,
208 NAU8325_ALC_HLD_SFT, NAU8325_ALC_HLD_MAX, 0),
209 SOC_SINGLE("ALC Target Level", NAU8325_R2D_ALC_CTRL2,
210 NAU8325_ALC_LVL_SFT, NAU8325_ALC_LVL_MAX, 0),
211 SOC_SINGLE("ALC Enable Switch", NAU8325_R2E_ALC_CTRL3,
212 NAU8325_ALC_EN_SFT, 1, 0),
213 };
214
nau8325_dac_event(struct snd_soc_dapm_widget * w,struct snd_kcontrol * kcontrol,int event)215 static int nau8325_dac_event(struct snd_soc_dapm_widget *w,
216 struct snd_kcontrol *kcontrol, int event)
217 {
218 struct snd_soc_component *component =
219 snd_soc_dapm_to_component(w->dapm);
220 struct nau8325 *nau8325 = snd_soc_component_get_drvdata(component);
221
222 switch (event) {
223 case SND_SOC_DAPM_POST_PMU:
224 regmap_update_bits(nau8325->regmap, NAU8325_R12_MUTE_CTRL,
225 NAU8325_SOFT_MUTE, 0);
226 msleep(30);
227 break;
228 case SND_SOC_DAPM_PRE_PMD:
229 /* Soft mute the output to prevent the pop noise. */
230 regmap_update_bits(nau8325->regmap, NAU8325_R12_MUTE_CTRL,
231 NAU8325_SOFT_MUTE, NAU8325_SOFT_MUTE);
232 msleep(30);
233 break;
234 default:
235 return -EINVAL;
236 }
237
238 return 0;
239 }
240
nau8325_powerup_event(struct snd_soc_dapm_widget * w,struct snd_kcontrol * kcontrol,int event)241 static int nau8325_powerup_event(struct snd_soc_dapm_widget *w,
242 struct snd_kcontrol *kcontrol, int event)
243 {
244 struct snd_soc_component *component =
245 snd_soc_dapm_to_component(w->dapm);
246 struct nau8325 *nau8325 = snd_soc_component_get_drvdata(component);
247
248 if (nau8325->clock_detection)
249 return 0;
250
251 switch (event) {
252 case SND_SOC_DAPM_POST_PMU:
253 regmap_update_bits(nau8325->regmap, NAU8325_R40_CLK_DET_CTRL,
254 NAU8325_PWRUP_DFT, NAU8325_PWRUP_DFT);
255 break;
256 case SND_SOC_DAPM_POST_PMD:
257 regmap_update_bits(nau8325->regmap, NAU8325_R40_CLK_DET_CTRL,
258 NAU8325_PWRUP_DFT, 0);
259 break;
260 default:
261 return -EINVAL;
262 }
263
264 return 0;
265 }
266
267 static const struct snd_soc_dapm_widget nau8325_dapm_widgets[] = {
268 SND_SOC_DAPM_SUPPLY("Power Up", SND_SOC_NOPM, 0, 0,
269 nau8325_powerup_event, SND_SOC_DAPM_POST_PMU |
270 SND_SOC_DAPM_POST_PMD),
271 SND_SOC_DAPM_DAC_E("DACL", NULL, NAU8325_R04_ENA_CTRL,
272 NAU8325_DAC_LEFT_CH_EN_SFT, 0, nau8325_dac_event,
273 SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD),
274 SND_SOC_DAPM_DAC_E("DACR", NULL, NAU8325_R04_ENA_CTRL,
275 NAU8325_DAC_RIGHT_CH_EN_SFT, 0, nau8325_dac_event,
276 SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD),
277 SND_SOC_DAPM_AIF_IN("AIFRX", "Playback", 0, SND_SOC_NOPM, 0, 0),
278
279 SND_SOC_DAPM_OUTPUT("SPKL"),
280 SND_SOC_DAPM_OUTPUT("SPKR"),
281 };
282
283 static const struct snd_soc_dapm_route nau8325_dapm_routes[] = {
284 { "DACL", NULL, "Power Up" },
285 { "DACR", NULL, "Power Up" },
286
287 { "DACL", NULL, "AIFRX" },
288 { "DACR", NULL, "AIFRX" },
289 { "SPKL", NULL, "DACL" },
290 { "SPKR", NULL, "DACR" },
291 };
292
nau8325_srate_clk_apply(struct nau8325 * nau8325,const struct nau8325_srate_attr * srate_table,int n1_sel,int mclk_mult_sel,int n2_sel)293 static int nau8325_srate_clk_apply(struct nau8325 *nau8325,
294 const struct nau8325_srate_attr *srate_table,
295 int n1_sel, int mclk_mult_sel, int n2_sel)
296 {
297 if (!srate_table || n2_sel < 0 || n2_sel >= ARRAY_SIZE(mclk_n2_div) ||
298 n1_sel < 0 || n1_sel >= ARRAY_SIZE(mclk_n1_div)) {
299 dev_dbg(nau8325->dev, "The CLK isn't supported.");
300 return -EINVAL;
301 }
302
303 regmap_update_bits(nau8325->regmap, NAU8325_R40_CLK_DET_CTRL,
304 NAU8325_REG_SRATE_MASK | NAU8325_REG_DIV_MAX,
305 (srate_table->range << NAU8325_REG_SRATE_SFT) |
306 (srate_table->max ? NAU8325_REG_DIV_MAX : 0));
307 regmap_update_bits(nau8325->regmap, NAU8325_R03_CLK_CTRL,
308 NAU8325_MCLK_SRC_MASK, mclk_n2_div[n2_sel].val);
309 regmap_update_bits(nau8325->regmap, NAU8325_R03_CLK_CTRL,
310 NAU8325_CLK_MUL_SRC_MASK,
311 mclk_n1_div[n1_sel].val << NAU8325_CLK_MUL_SRC_SFT);
312
313 if (mclk_mult_sel != CLK_PROC_BYPASS) {
314 regmap_update_bits(nau8325->regmap, NAU8325_R03_CLK_CTRL,
315 NAU8325_MCLK_SEL_MASK,
316 mclk_n3_mult[mclk_mult_sel].val <<
317 NAU8325_MCLK_SEL_SFT);
318 } else {
319 regmap_update_bits(nau8325->regmap, NAU8325_R03_CLK_CTRL,
320 NAU8325_MCLK_SEL_MASK, 0);
321 }
322
323 switch (mclk_mult_sel) {
324 case 2:
325 regmap_update_bits(nau8325->regmap, NAU8325_R65_ANALOG_CONTROL_5,
326 NAU8325_MCLK4XEN_EN, NAU8325_MCLK4XEN_EN);
327 break;
328 case 3:
329 regmap_update_bits(nau8325->regmap, NAU8325_R65_ANALOG_CONTROL_5,
330 NAU8325_MCLK4XEN_EN | NAU8325_MCLK8XEN_EN,
331 NAU8325_MCLK4XEN_EN | NAU8325_MCLK8XEN_EN);
332 break;
333 default:
334 regmap_update_bits(nau8325->regmap, NAU8325_R65_ANALOG_CONTROL_5,
335 NAU8325_MCLK4XEN_EN | NAU8325_MCLK8XEN_EN, 0);
336 break;
337 }
338
339 return 0;
340 }
341
nau8325_clksrc_n2(struct nau8325 * nau8325,const struct nau8325_srate_attr * srate_table,int mclk,int * n2_sel)342 static int nau8325_clksrc_n2(struct nau8325 *nau8325,
343 const struct nau8325_srate_attr *srate_table,
344 int mclk, int *n2_sel)
345 {
346 int i, mclk_src, ratio;
347
348 ratio = NAU8325_MCLK_FS_RATIO_NUM;
349 for (i = 0; i < ARRAY_SIZE(mclk_n2_div); i++) {
350 mclk_src = mclk >> mclk_n2_div[i].param;
351 if (srate_table->mclk_src[NAU8325_MCLK_FS_RATIO_256] == mclk_src) {
352 ratio = NAU8325_MCLK_FS_RATIO_256;
353 break;
354 } else if (srate_table->mclk_src[NAU8325_MCLK_FS_RATIO_400] == mclk_src) {
355 ratio = NAU8325_MCLK_FS_RATIO_400;
356 break;
357 } else if (srate_table->mclk_src[NAU8325_MCLK_FS_RATIO_500] == mclk_src) {
358 ratio = NAU8325_MCLK_FS_RATIO_500;
359 break;
360 }
361 }
362 if (ratio != NAU8325_MCLK_FS_RATIO_NUM)
363 *n2_sel = i;
364
365 return ratio;
366 }
367
target_srate_attribute(int srate)368 static const struct nau8325_srate_attr *target_srate_attribute(int srate)
369 {
370 int i;
371
372 for (i = 0; i < ARRAY_SIZE(target_srate_table); i++)
373 if (target_srate_table[i].fs == srate)
374 break;
375
376 if (i == ARRAY_SIZE(target_srate_table))
377 goto proc_err;
378
379 return &target_srate_table[i];
380
381 proc_err:
382 return NULL;
383 }
384
nau8325_clksrc_choose(struct nau8325 * nau8325,const struct nau8325_srate_attr ** srate_table,int * n1_sel,int * mult_sel,int * n2_sel)385 static int nau8325_clksrc_choose(struct nau8325 *nau8325,
386 const struct nau8325_srate_attr **srate_table,
387 int *n1_sel, int *mult_sel, int *n2_sel)
388 {
389 int i, j, mclk, mclk_max, ratio, ratio_sel, n2_max;
390
391 if (!nau8325->mclk || !nau8325->fs)
392 goto proc_err;
393
394 /* select sampling rate and MCLK_SRC */
395 *srate_table = target_srate_attribute(nau8325->fs);
396 if (!*srate_table)
397 goto proc_err;
398
399 /* First check clock from MCLK directly, decide N2 for MCLK_SRC.
400 * If not good, consider 1/N1 and Multiplier.
401 */
402 ratio = nau8325_clksrc_n2(nau8325, *srate_table, nau8325->mclk, n2_sel);
403 if (ratio != NAU8325_MCLK_FS_RATIO_NUM) {
404 *n1_sel = 0;
405 *mult_sel = CLK_PROC_BYPASS;
406 *n2_sel = MCLK_SRC;
407 goto proc_done;
408 }
409
410 /* Get MCLK_SRC through 1/N, Multiplier, and then 1/N2. */
411 mclk_max = 0;
412 for (i = 0; i < ARRAY_SIZE(mclk_n1_div); i++) {
413 for (j = 0; j < ARRAY_SIZE(mclk_n3_mult); j++) {
414 mclk = nau8325->mclk << mclk_n3_mult[j].param;
415 mclk = mclk / mclk_n1_div[i].param;
416 ratio = nau8325_clksrc_n2(nau8325,
417 *srate_table, mclk, n2_sel);
418 if (ratio != NAU8325_MCLK_FS_RATIO_NUM &&
419 (mclk_max < mclk || i > *n1_sel)) {
420 mclk_max = mclk;
421 n2_max = *n2_sel;
422 *n1_sel = i;
423 *mult_sel = j;
424 ratio_sel = ratio;
425 goto proc_done;
426 }
427 }
428 }
429 if (mclk_max) {
430 *n2_sel = n2_max;
431 ratio = ratio_sel;
432 goto proc_done;
433 }
434
435 proc_err:
436 dev_dbg(nau8325->dev, "The MCLK %d is invalid. It can't get MCLK_SRC of 256/400/500 FS (%d)",
437 nau8325->mclk, nau8325->fs);
438 return -EINVAL;
439 proc_done:
440 dev_dbg(nau8325->dev, "nau8325->fs=%d,range=0x%x, %s, (n1,mu,n2,dmu):(%d,%d,%d), MCLK_SRC=%uHz (%d)",
441 nau8325->fs, (*srate_table)->range,
442 (*srate_table)->max ? "MAX" : "MIN",
443 *n1_sel == CLK_PROC_BYPASS ?
444 CLK_PROC_BYPASS : mclk_n1_div[*n1_sel].param,
445 *mult_sel == CLK_PROC_BYPASS ?
446 CLK_PROC_BYPASS : 1 << mclk_n3_mult[*mult_sel].param,
447 1 << mclk_n2_div[*n2_sel].param,
448 (*srate_table)->mclk_src[ratio],
449 (*srate_table)->mclk_src[ratio] / nau8325->fs);
450
451 return 0;
452 }
453
nau8325_clock_config(struct nau8325 * nau8325)454 static int nau8325_clock_config(struct nau8325 *nau8325)
455 {
456 const struct nau8325_srate_attr *srate_table;
457 int ret, n1_sel, mult_sel, n2_sel;
458
459 ret = nau8325_clksrc_choose(nau8325, &srate_table,
460 &n1_sel, &mult_sel, &n2_sel);
461 if (ret)
462 goto err;
463
464 ret = nau8325_srate_clk_apply(nau8325, srate_table,
465 n1_sel, mult_sel, n2_sel);
466 if (ret)
467 goto err;
468
469 return 0;
470 err:
471 return ret;
472 }
473
nau8325_get_osr(struct nau8325 * nau8325)474 static const struct nau8325_osr_attr *nau8325_get_osr(struct nau8325 *nau8325)
475 {
476 unsigned int osr;
477
478 regmap_read(nau8325->regmap, NAU8325_R29_DAC_CTRL1, &osr);
479 osr &= NAU8325_DAC_OVERSAMPLE_MASK;
480 if (osr >= ARRAY_SIZE(osr_dac_sel))
481 return NULL;
482
483 return &osr_dac_sel[osr];
484 }
485
nau8325_dai_startup(struct snd_pcm_substream * substream,struct snd_soc_dai * dai)486 static int nau8325_dai_startup(struct snd_pcm_substream *substream,
487 struct snd_soc_dai *dai)
488 {
489 struct snd_soc_component *component = dai->component;
490 struct nau8325 *nau8325 = snd_soc_component_get_drvdata(component);
491 const struct nau8325_osr_attr *osr;
492
493 osr = nau8325_get_osr(nau8325);
494 if (!osr || !osr->osr)
495 return -EINVAL;
496
497 return snd_pcm_hw_constraint_minmax(substream->runtime,
498 SNDRV_PCM_HW_PARAM_RATE,
499 0, CLK_DA_AD_MAX / osr->osr);
500 }
501
nau8325_hw_params(struct snd_pcm_substream * substream,struct snd_pcm_hw_params * params,struct snd_soc_dai * dai)502 static int nau8325_hw_params(struct snd_pcm_substream *substream,
503 struct snd_pcm_hw_params *params,
504 struct snd_soc_dai *dai)
505 {
506 struct snd_soc_component *component = dai->component;
507 struct nau8325 *nau8325 = snd_soc_component_get_drvdata(component);
508 unsigned int val_len = 0;
509 const struct nau8325_osr_attr *osr;
510 int ret;
511
512 nau8325->fs = params_rate(params);
513 osr = nau8325_get_osr(nau8325);
514 if (!osr || !osr->osr || nau8325->fs * osr->osr > CLK_DA_AD_MAX) {
515 ret = -EINVAL;
516 goto err;
517 }
518 regmap_update_bits(nau8325->regmap, NAU8325_R03_CLK_CTRL,
519 NAU8325_CLK_DAC_SRC_MASK,
520 osr->clk_src << NAU8325_CLK_DAC_SRC_SFT);
521
522 ret = nau8325_clock_config(nau8325);
523 if (ret)
524 goto err;
525
526 switch (params_width(params)) {
527 case 16:
528 val_len |= NAU8325_I2S_DL_16;
529 break;
530 case 20:
531 val_len |= NAU8325_I2S_DL_20;
532 break;
533 case 24:
534 val_len |= NAU8325_I2S_DL_24;
535 break;
536 case 32:
537 val_len |= NAU8325_I2S_DL_32;
538 break;
539 default:
540 ret = -EINVAL;
541 goto err;
542 }
543
544 regmap_update_bits(nau8325->regmap, NAU8325_R0D_I2S_PCM_CTRL1,
545 NAU8325_I2S_DL_MASK, val_len);
546
547 return 0;
548
549 err:
550 return ret;
551 }
552
nau8325_set_fmt(struct snd_soc_dai * dai,unsigned int fmt)553 static int nau8325_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
554 {
555 struct snd_soc_component *component = dai->component;
556 struct nau8325 *nau8325 = snd_soc_component_get_drvdata(component);
557 unsigned int ctrl1_val = 0;
558
559 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
560 case SND_SOC_DAIFMT_CBC_CFC:
561 break;
562 default:
563 return -EINVAL;
564 }
565
566 switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
567 case SND_SOC_DAIFMT_NB_NF:
568 break;
569 case SND_SOC_DAIFMT_IB_NF:
570 ctrl1_val |= NAU8325_I2S_BP_INV;
571 break;
572 default:
573 return -EINVAL;
574 }
575
576 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
577 case SND_SOC_DAIFMT_I2S:
578 ctrl1_val |= NAU8325_I2S_DF_I2S;
579 break;
580 case SND_SOC_DAIFMT_LEFT_J:
581 ctrl1_val |= NAU8325_I2S_DF_LEFT;
582 break;
583 case SND_SOC_DAIFMT_RIGHT_J:
584 ctrl1_val |= NAU8325_I2S_DF_RIGTH;
585 break;
586 case SND_SOC_DAIFMT_DSP_A:
587 ctrl1_val |= NAU8325_I2S_DF_PCM_AB;
588 break;
589 case SND_SOC_DAIFMT_DSP_B:
590 ctrl1_val |= NAU8325_I2S_DF_PCM_AB;
591 ctrl1_val |= NAU8325_I2S_PCMB_EN;
592 break;
593 default:
594 return -EINVAL;
595 }
596
597 regmap_update_bits(nau8325->regmap, NAU8325_R0D_I2S_PCM_CTRL1,
598 NAU8325_I2S_DF_MASK | NAU8325_I2S_BP_MASK |
599 NAU8325_I2S_PCMB_EN, ctrl1_val);
600
601 return 0;
602 }
603
nau8325_set_sysclk(struct snd_soc_component * component,int clk_id,int source,unsigned int freq,int dir)604 static int nau8325_set_sysclk(struct snd_soc_component *component, int clk_id,
605 int source, unsigned int freq, int dir)
606 {
607 struct nau8325 *nau8325 = snd_soc_component_get_drvdata(component);
608
609 if (freq < MASTER_CLK_MIN || freq > MASTER_CLK_MAX) {
610 dev_dbg(nau8325->dev, "MCLK exceeds the range, MCLK:%d", freq);
611 return -EINVAL;
612 }
613
614 nau8325->mclk = freq;
615 dev_dbg(nau8325->dev, "MCLK %dHz", nau8325->mclk);
616
617 return 0;
618 }
619
620 static const struct snd_soc_component_driver nau8325_component_driver = {
621 .set_sysclk = nau8325_set_sysclk,
622 .suspend_bias_off = true,
623 .controls = nau8325_snd_controls,
624 .num_controls = ARRAY_SIZE(nau8325_snd_controls),
625 .dapm_widgets = nau8325_dapm_widgets,
626 .num_dapm_widgets = ARRAY_SIZE(nau8325_dapm_widgets),
627 .dapm_routes = nau8325_dapm_routes,
628 .num_dapm_routes = ARRAY_SIZE(nau8325_dapm_routes),
629 };
630
631 static const struct snd_soc_dai_ops nau8325_dai_ops = {
632 .startup = nau8325_dai_startup,
633 .hw_params = nau8325_hw_params,
634 .set_fmt = nau8325_set_fmt,
635 };
636
637 #define NAU8325_RATES SNDRV_PCM_RATE_8000_96000
638 #define NAU8325_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE \
639 | SNDRV_PCM_FMTBIT_S24_3LE)
640
641 static struct snd_soc_dai_driver nau8325_dai = {
642 .name = NAU8325_CODEC_DAI,
643 .playback = {
644 .stream_name = "Playback",
645 .channels_min = 1,
646 .channels_max = 2,
647 .rates = NAU8325_RATES,
648 .formats = NAU8325_FORMATS,
649 },
650 .ops = &nau8325_dai_ops,
651 };
652
653 static const struct regmap_config nau8325_regmap_config = {
654 .reg_bits = NAU8325_REG_ADDR_LEN,
655 .val_bits = NAU8325_REG_DATA_LEN,
656
657 .max_register = NAU8325_REG_MAX,
658 .readable_reg = nau8325_readable_reg,
659 .writeable_reg = nau8325_writeable_reg,
660 .volatile_reg = nau8325_volatile_reg,
661
662 .cache_type = REGCACHE_RBTREE,
663 .reg_defaults = nau8325_reg_defaults,
664 .num_reg_defaults = ARRAY_SIZE(nau8325_reg_defaults),
665 };
666
nau8325_reset_chip(struct regmap * regmap)667 static void nau8325_reset_chip(struct regmap *regmap)
668 {
669 regmap_write(regmap, NAU8325_R00_HARDWARE_RST, 0x0001);
670 regmap_write(regmap, NAU8325_R00_HARDWARE_RST, 0x0000);
671 }
672
nau8325_init_regs(struct nau8325 * nau8325)673 static void nau8325_init_regs(struct nau8325 *nau8325)
674 {
675 struct regmap *regmap = nau8325->regmap;
676 struct device *dev = nau8325->dev;
677
678 /* set ALC parameters */
679 regmap_update_bits(regmap, NAU8325_R2C_ALC_CTRL1,
680 NAU8325_ALC_MAXGAIN_MASK,
681 0x7 << NAU8325_ALC_MAXGAIN_SFT);
682 regmap_update_bits(regmap, NAU8325_R2D_ALC_CTRL2,
683 NAU8325_ALC_DCY_MASK | NAU8325_ALC_ATK_MASK |
684 NAU8325_ALC_HLD_MASK, (0x5 << NAU8325_ALC_DCY_SFT) |
685 (0x3 << NAU8325_ALC_ATK_SFT) |
686 (0x5 << NAU8325_ALC_HLD_SFT));
687 /* Enable ALC to avoid signal distortion when battery low. */
688 if (nau8325->alc_enable)
689 regmap_update_bits(regmap, NAU8325_R2E_ALC_CTRL3,
690 NAU8325_ALC_EN, NAU8325_ALC_EN);
691 if (nau8325->clock_detection)
692 regmap_update_bits(regmap, NAU8325_R40_CLK_DET_CTRL,
693 NAU8325_CLKPWRUP_DIS |
694 NAU8325_PWRUP_DFT, 0);
695 else
696 regmap_update_bits(regmap, NAU8325_R40_CLK_DET_CTRL,
697 NAU8325_CLKPWRUP_DIS | NAU8325_PWRUP_DFT,
698 NAU8325_CLKPWRUP_DIS);
699 if (nau8325->clock_det_data)
700 regmap_update_bits(regmap, NAU8325_R40_CLK_DET_CTRL,
701 NAU8325_APWRUP_EN, NAU8325_APWRUP_EN);
702 else
703 regmap_update_bits(regmap, NAU8325_R40_CLK_DET_CTRL,
704 NAU8325_APWRUP_EN, 0);
705
706 /* DAC Reference Voltage Setting */
707 switch (nau8325->dac_vref_microvolt) {
708 case 1800000:
709 regmap_update_bits(regmap, NAU8325_R73_RDAC,
710 NAU8325_DACVREFSEL_MASK, 0 << NAU8325_DACVREFSEL_SFT);
711 break;
712 case 2700000:
713 regmap_update_bits(regmap, NAU8325_R73_RDAC,
714 NAU8325_DACVREFSEL_MASK, 1 << NAU8325_DACVREFSEL_SFT);
715 break;
716 case 2880000:
717 regmap_update_bits(regmap, NAU8325_R73_RDAC,
718 NAU8325_DACVREFSEL_MASK, 2 << NAU8325_DACVREFSEL_SFT);
719 break;
720 case 3060000:
721 regmap_update_bits(regmap, NAU8325_R73_RDAC,
722 NAU8325_DACVREFSEL_MASK, 3 << NAU8325_DACVREFSEL_SFT);
723 break;
724 default:
725 dev_dbg(dev, "Invalid dac-vref-microvolt %d", nau8325->dac_vref_microvolt);
726
727 }
728
729 /* DAC Reference Voltage Decoupling Capacitors. */
730 regmap_update_bits(regmap, NAU8325_R63_ANALOG_CONTROL_3,
731 NAU8325_CLASSD_COARSE_GAIN_MASK, 0x4);
732 /* Auto-Att Min Gain 0dB, Class-D N Driver Slew Rate -25%. */
733 regmap_update_bits(regmap, NAU8325_R64_ANALOG_CONTROL_4,
734 NAU8325_CLASSD_SLEWN_MASK, 0x7);
735
736 /* VMID Tieoff (VMID Resistor Selection) */
737 switch (nau8325->vref_impedance_ohms) {
738 case 0:
739 regmap_update_bits(regmap, NAU8325_R60_BIAS_ADJ,
740 NAU8325_BIAS_VMID_SEL_MASK, 0 << NAU8325_BIAS_VMID_SEL_SFT);
741 break;
742 case 25000:
743 regmap_update_bits(regmap, NAU8325_R60_BIAS_ADJ,
744 NAU8325_BIAS_VMID_SEL_MASK, 1 << NAU8325_BIAS_VMID_SEL_SFT);
745 break;
746 case 125000:
747 regmap_update_bits(regmap, NAU8325_R60_BIAS_ADJ,
748 NAU8325_BIAS_VMID_SEL_MASK, 2 << NAU8325_BIAS_VMID_SEL_SFT);
749 break;
750 case 2500:
751 regmap_update_bits(regmap, NAU8325_R60_BIAS_ADJ,
752 NAU8325_BIAS_VMID_SEL_MASK, 3 << NAU8325_BIAS_VMID_SEL_SFT);
753 break;
754 default:
755 dev_dbg(dev, "Invalid vref-impedance-ohms %d", nau8325->vref_impedance_ohms);
756 }
757
758
759 /* enable VMID, BIAS, DAC, DCA CLOCK, Voltage/Current Amps
760 */
761 regmap_update_bits(regmap, NAU8325_R61_ANALOG_CONTROL_1,
762 NAU8325_DACEN_MASK | NAU8325_DACCLKEN_MASK |
763 NAU8325_DACEN_R_MASK | NAU8325_DACCLKEN_R_MASK |
764 NAU8325_CLASSDEN_MASK | NAU8325_VMDFSTENB_MASK |
765 NAU8325_BIASEN_MASK | NAU8325_VMIDEN_MASK,
766 (0x1 << NAU8325_DACEN_SFT) |
767 (0x1 << NAU8325_DACCLKEN_SFT) |
768 (0x1 << NAU8325_DACEN_R_SFT) |
769 (0x1 << NAU8325_DACCLKEN_R_SFT) |
770 (0x1 << NAU8325_CLASSDEN_SFT) |
771 (0x1 << NAU8325_VMDFSTENB_SFT) |
772 (0x1 << NAU8325_BIASEN_SFT) | 0x3);
773
774 /* Enable ALC to avoid signal distortion when battery low. */
775 if (nau8325->alc_enable)
776 regmap_update_bits(regmap, NAU8325_R2E_ALC_CTRL3,
777 NAU8325_ALC_EN, NAU8325_ALC_EN);
778 if (nau8325->clock_det_data)
779 regmap_update_bits(regmap, NAU8325_R40_CLK_DET_CTRL,
780 NAU8325_APWRUP_EN, NAU8325_APWRUP_EN);
781 else
782 regmap_update_bits(regmap, NAU8325_R40_CLK_DET_CTRL,
783 NAU8325_APWRUP_EN, 0);
784 if (nau8325->clock_detection)
785 regmap_update_bits(regmap, NAU8325_R40_CLK_DET_CTRL,
786 NAU8325_CLKPWRUP_DIS |
787 NAU8325_PWRUP_DFT, 0);
788 else
789 regmap_update_bits(regmap, NAU8325_R40_CLK_DET_CTRL,
790 NAU8325_CLKPWRUP_DIS | NAU8325_PWRUP_DFT,
791 NAU8325_CLKPWRUP_DIS);
792 regmap_update_bits(regmap, NAU8325_R29_DAC_CTRL1,
793 NAU8325_DAC_OVERSAMPLE_MASK,
794 NAU8325_DAC_OVERSAMPLE_128);
795 }
796
nau8325_print_device_properties(struct nau8325 * nau8325)797 static void nau8325_print_device_properties(struct nau8325 *nau8325)
798 {
799 struct device *dev = nau8325->dev;
800
801 dev_dbg(dev, "vref-impedance-ohms: %d", nau8325->vref_impedance_ohms);
802 dev_dbg(dev, "dac-vref-microvolt: %d", nau8325->dac_vref_microvolt);
803 dev_dbg(dev, "alc-enable: %d", nau8325->alc_enable);
804 dev_dbg(dev, "clock-det-data: %d", nau8325->clock_det_data);
805 dev_dbg(dev, "clock-detection-disable: %d", nau8325->clock_detection);
806 }
807
nau8325_read_device_properties(struct device * dev,struct nau8325 * nau8325)808 static int nau8325_read_device_properties(struct device *dev,
809 struct nau8325 *nau8325)
810 {
811 int ret;
812
813 nau8325->alc_enable =
814 device_property_read_bool(dev, "nuvoton,alc-enable");
815 nau8325->clock_det_data =
816 device_property_read_bool(dev, "nuvoton,clock-det-data");
817 nau8325->clock_detection =
818 !device_property_read_bool(dev, "nuvoton,clock-detection-disable");
819
820 ret = device_property_read_u32(dev, "nuvoton,vref-impedance-ohms",
821 &nau8325->vref_impedance_ohms);
822 if (ret)
823 nau8325->vref_impedance_ohms = 125000;
824 ret = device_property_read_u32(dev, "nuvoton,dac-vref-microvolt",
825 &nau8325->dac_vref_microvolt);
826 if (ret)
827 nau8325->dac_vref_microvolt = 2880000;
828
829 return 0;
830 }
831
nau8325_i2c_probe(struct i2c_client * i2c,const struct i2c_device_id * id)832 static int nau8325_i2c_probe(struct i2c_client *i2c,
833 const struct i2c_device_id *id)
834 {
835 struct device *dev = &i2c->dev;
836 struct nau8325 *nau8325 = dev_get_platdata(dev);
837 int ret, value;
838
839 if (!nau8325) {
840 nau8325 = devm_kzalloc(dev, sizeof(*nau8325), GFP_KERNEL);
841 if (!nau8325) {
842 ret = -ENOMEM;
843 goto err;
844 }
845 ret = nau8325_read_device_properties(dev, nau8325);
846 if (ret)
847 goto err;
848 }
849 i2c_set_clientdata(i2c, nau8325);
850
851 nau8325->regmap = devm_regmap_init_i2c(i2c, &nau8325_regmap_config);
852 if (IS_ERR(nau8325->regmap)) {
853 ret = PTR_ERR(nau8325->regmap);
854 goto err;
855 }
856 nau8325->dev = dev;
857 nau8325_print_device_properties(nau8325);
858
859 nau8325_reset_chip(nau8325->regmap);
860 ret = regmap_read(nau8325->regmap, NAU8325_R02_DEVICE_ID, &value);
861 if (ret) {
862 dev_dbg(dev, "Failed to read device id (%d)", ret);
863 goto err;
864 }
865 nau8325_init_regs(nau8325);
866
867 ret = devm_snd_soc_register_component(dev, &nau8325_component_driver,
868 &nau8325_dai, 1);
869 err:
870 return ret;
871 }
872
873 static const struct i2c_device_id nau8325_i2c_ids[] = {
874 { "nau8325" },
875 { }
876 };
877 MODULE_DEVICE_TABLE(i2c, nau8325_i2c_ids);
878
879 #ifdef CONFIG_OF
880 static const struct of_device_id nau8325_of_ids[] = {
881 { .compatible = "nuvoton,nau8325", },
882 {}
883 };
884 MODULE_DEVICE_TABLE(of, nau8325_of_ids);
885 #endif
886
887 static struct i2c_driver nau8325_i2c_driver = {
888 .driver = {
889 .name = "nau8325",
890 .of_match_table = of_match_ptr(nau8325_of_ids),
891 },
892 .probe = nau8325_i2c_probe,
893 .id_table = nau8325_i2c_ids,
894 };
895 module_i2c_driver(nau8325_i2c_driver);
896
897 MODULE_DESCRIPTION("ASoC NAU8325 driver");
898 MODULE_AUTHOR("Seven Lee <WTLI@nuvoton.com>");
899 MODULE_AUTHOR("David Lin <CTLIN0@nuvoton.com>");
900 MODULE_LICENSE("GPL");
901