1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * PCM3168A codec driver
4 *
5 * Copyright (C) 2015 Imagination Technologies Ltd.
6 *
7 * Author: Damien Horsley <Damien.Horsley@imgtec.com>
8 */
9
10 #include <linux/clk.h>
11 #include <linux/delay.h>
12 #include <linux/gpio/consumer.h>
13 #include <linux/module.h>
14 #include <linux/pm_runtime.h>
15 #include <linux/regulator/consumer.h>
16
17 #include <sound/pcm_params.h>
18 #include <sound/soc.h>
19 #include <sound/tlv.h>
20
21 #include "pcm3168a.h"
22
23 #define PCM3168A_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | \
24 SNDRV_PCM_FMTBIT_S24_3LE | \
25 SNDRV_PCM_FMTBIT_S24_LE)
26
27 #define PCM3168A_FMT_I2S 0x0
28 #define PCM3168A_FMT_LEFT_J 0x1
29 #define PCM3168A_FMT_RIGHT_J 0x2
30 #define PCM3168A_FMT_RIGHT_J_16 0x3
31 #define PCM3168A_FMT_DSP_A 0x4
32 #define PCM3168A_FMT_DSP_B 0x5
33 #define PCM3168A_FMT_I2S_TDM 0x6
34 #define PCM3168A_FMT_LEFT_J_TDM 0x7
35
36 static const char *const pcm3168a_supply_names[] = {
37 "VDD1",
38 "VDD2",
39 "VCCAD1",
40 "VCCAD2",
41 "VCCDA1",
42 "VCCDA2"
43 };
44
45 #define PCM3168A_DAI_DAC 0
46 #define PCM3168A_DAI_ADC 1
47
48 /* ADC/DAC side parameters */
49 struct pcm3168a_io_params {
50 bool provider_mode;
51 unsigned int format;
52 int tdm_slots;
53 u32 tdm_mask;
54 int slot_width;
55 };
56
57 struct pcm3168a_priv {
58 struct regulator_bulk_data supplies[ARRAY_SIZE(pcm3168a_supply_names)];
59 struct regmap *regmap;
60 struct clk *scki;
61 struct gpio_desc *gpio_rst;
62 unsigned long sysclk;
63
64 struct pcm3168a_io_params io_params[2];
65 struct snd_soc_dai_driver dai_drv[2];
66 };
67
68 static const char *const pcm3168a_roll_off[] = { "Sharp", "Slow" };
69
70 static SOC_ENUM_SINGLE_DECL(pcm3168a_d1_roll_off, PCM3168A_DAC_OP_FLT,
71 PCM3168A_DAC_FLT_SHIFT, pcm3168a_roll_off);
72 static SOC_ENUM_SINGLE_DECL(pcm3168a_d2_roll_off, PCM3168A_DAC_OP_FLT,
73 PCM3168A_DAC_FLT_SHIFT + 1, pcm3168a_roll_off);
74 static SOC_ENUM_SINGLE_DECL(pcm3168a_d3_roll_off, PCM3168A_DAC_OP_FLT,
75 PCM3168A_DAC_FLT_SHIFT + 2, pcm3168a_roll_off);
76 static SOC_ENUM_SINGLE_DECL(pcm3168a_d4_roll_off, PCM3168A_DAC_OP_FLT,
77 PCM3168A_DAC_FLT_SHIFT + 3, pcm3168a_roll_off);
78
79 static const char *const pcm3168a_volume_type[] = {
80 "Individual", "Master + Individual" };
81
82 static SOC_ENUM_SINGLE_DECL(pcm3168a_dac_volume_type, PCM3168A_DAC_ATT_DEMP_ZF,
83 PCM3168A_DAC_ATMDDA_SHIFT, pcm3168a_volume_type);
84
85 static const char *const pcm3168a_att_speed_mult[] = { "2048", "4096" };
86
87 static SOC_ENUM_SINGLE_DECL(pcm3168a_dac_att_mult, PCM3168A_DAC_ATT_DEMP_ZF,
88 PCM3168A_DAC_ATSPDA_SHIFT, pcm3168a_att_speed_mult);
89
90 static const char *const pcm3168a_demp[] = {
91 "Disabled", "48khz", "44.1khz", "32khz" };
92
93 static SOC_ENUM_SINGLE_DECL(pcm3168a_dac_demp, PCM3168A_DAC_ATT_DEMP_ZF,
94 PCM3168A_DAC_DEMP_SHIFT, pcm3168a_demp);
95
96 static const char *const pcm3168a_zf_func[] = {
97 "DAC 1/2/3/4 AND", "DAC 1/2/3/4 OR", "DAC 1/2/3 AND",
98 "DAC 1/2/3 OR", "DAC 4 AND", "DAC 4 OR" };
99
100 static SOC_ENUM_SINGLE_DECL(pcm3168a_dac_zf_func, PCM3168A_DAC_ATT_DEMP_ZF,
101 PCM3168A_DAC_AZRO_SHIFT, pcm3168a_zf_func);
102
103 static const char *const pcm3168a_pol[] = { "Active High", "Active Low" };
104
105 static SOC_ENUM_SINGLE_DECL(pcm3168a_dac_zf_pol, PCM3168A_DAC_ATT_DEMP_ZF,
106 PCM3168A_DAC_ATSPDA_SHIFT, pcm3168a_pol);
107
108 static const char *const pcm3168a_con[] = { "Differential", "Single-Ended" };
109
110 static SOC_ENUM_DOUBLE_DECL(pcm3168a_adc1_con, PCM3168A_ADC_SEAD,
111 0, 1, pcm3168a_con);
112 static SOC_ENUM_DOUBLE_DECL(pcm3168a_adc2_con, PCM3168A_ADC_SEAD,
113 2, 3, pcm3168a_con);
114 static SOC_ENUM_DOUBLE_DECL(pcm3168a_adc3_con, PCM3168A_ADC_SEAD,
115 4, 5, pcm3168a_con);
116
117 static SOC_ENUM_SINGLE_DECL(pcm3168a_adc_volume_type, PCM3168A_ADC_ATT_OVF,
118 PCM3168A_ADC_ATMDAD_SHIFT, pcm3168a_volume_type);
119
120 static SOC_ENUM_SINGLE_DECL(pcm3168a_adc_att_mult, PCM3168A_ADC_ATT_OVF,
121 PCM3168A_ADC_ATSPAD_SHIFT, pcm3168a_att_speed_mult);
122
123 static SOC_ENUM_SINGLE_DECL(pcm3168a_adc_ov_pol, PCM3168A_ADC_ATT_OVF,
124 PCM3168A_ADC_OVFP_SHIFT, pcm3168a_pol);
125
126 /* -100db to 0db, register values 0-54 cause mute */
127 static const DECLARE_TLV_DB_SCALE(pcm3168a_dac_tlv, -10050, 50, 1);
128
129 /* -100db to 20db, register values 0-14 cause mute */
130 static const DECLARE_TLV_DB_SCALE(pcm3168a_adc_tlv, -10050, 50, 1);
131
132 static const struct snd_kcontrol_new pcm3168a_snd_controls[] = {
133 SOC_SINGLE("DAC Power-Save Switch", PCM3168A_DAC_PWR_MST_FMT,
134 PCM3168A_DAC_PSMDA_SHIFT, 1, 1),
135 SOC_ENUM("DAC1 Digital Filter roll-off", pcm3168a_d1_roll_off),
136 SOC_ENUM("DAC2 Digital Filter roll-off", pcm3168a_d2_roll_off),
137 SOC_ENUM("DAC3 Digital Filter roll-off", pcm3168a_d3_roll_off),
138 SOC_ENUM("DAC4 Digital Filter roll-off", pcm3168a_d4_roll_off),
139 SOC_DOUBLE("DAC1 Invert Switch", PCM3168A_DAC_INV, 0, 1, 1, 0),
140 SOC_DOUBLE("DAC2 Invert Switch", PCM3168A_DAC_INV, 2, 3, 1, 0),
141 SOC_DOUBLE("DAC3 Invert Switch", PCM3168A_DAC_INV, 4, 5, 1, 0),
142 SOC_DOUBLE("DAC4 Invert Switch", PCM3168A_DAC_INV, 6, 7, 1, 0),
143 SOC_ENUM("DAC Volume Control Type", pcm3168a_dac_volume_type),
144 SOC_ENUM("DAC Volume Rate Multiplier", pcm3168a_dac_att_mult),
145 SOC_ENUM("DAC De-Emphasis", pcm3168a_dac_demp),
146 SOC_ENUM("DAC Zero Flag Function", pcm3168a_dac_zf_func),
147 SOC_ENUM("DAC Zero Flag Polarity", pcm3168a_dac_zf_pol),
148 SOC_SINGLE_RANGE_TLV("Master Playback Volume",
149 PCM3168A_DAC_VOL_MASTER, 0, 54, 255, 0,
150 pcm3168a_dac_tlv),
151 SOC_DOUBLE_R_RANGE_TLV("DAC1 Playback Volume",
152 PCM3168A_DAC_VOL_CHAN_START,
153 PCM3168A_DAC_VOL_CHAN_START + 1,
154 0, 54, 255, 0, pcm3168a_dac_tlv),
155 SOC_DOUBLE_R_RANGE_TLV("DAC2 Playback Volume",
156 PCM3168A_DAC_VOL_CHAN_START + 2,
157 PCM3168A_DAC_VOL_CHAN_START + 3,
158 0, 54, 255, 0, pcm3168a_dac_tlv),
159 SOC_DOUBLE_R_RANGE_TLV("DAC3 Playback Volume",
160 PCM3168A_DAC_VOL_CHAN_START + 4,
161 PCM3168A_DAC_VOL_CHAN_START + 5,
162 0, 54, 255, 0, pcm3168a_dac_tlv),
163 SOC_DOUBLE_R_RANGE_TLV("DAC4 Playback Volume",
164 PCM3168A_DAC_VOL_CHAN_START + 6,
165 PCM3168A_DAC_VOL_CHAN_START + 7,
166 0, 54, 255, 0, pcm3168a_dac_tlv),
167 SOC_SINGLE("ADC1 High-Pass Filter Switch", PCM3168A_ADC_PWR_HPFB,
168 PCM3168A_ADC_BYP_SHIFT, 1, 1),
169 SOC_SINGLE("ADC2 High-Pass Filter Switch", PCM3168A_ADC_PWR_HPFB,
170 PCM3168A_ADC_BYP_SHIFT + 1, 1, 1),
171 SOC_SINGLE("ADC3 High-Pass Filter Switch", PCM3168A_ADC_PWR_HPFB,
172 PCM3168A_ADC_BYP_SHIFT + 2, 1, 1),
173 SOC_ENUM("ADC1 Connection Type", pcm3168a_adc1_con),
174 SOC_ENUM("ADC2 Connection Type", pcm3168a_adc2_con),
175 SOC_ENUM("ADC3 Connection Type", pcm3168a_adc3_con),
176 SOC_DOUBLE("ADC1 Invert Switch", PCM3168A_ADC_INV, 0, 1, 1, 0),
177 SOC_DOUBLE("ADC2 Invert Switch", PCM3168A_ADC_INV, 2, 3, 1, 0),
178 SOC_DOUBLE("ADC3 Invert Switch", PCM3168A_ADC_INV, 4, 5, 1, 0),
179 SOC_DOUBLE("ADC1 Mute Switch", PCM3168A_ADC_MUTE, 0, 1, 1, 0),
180 SOC_DOUBLE("ADC2 Mute Switch", PCM3168A_ADC_MUTE, 2, 3, 1, 0),
181 SOC_DOUBLE("ADC3 Mute Switch", PCM3168A_ADC_MUTE, 4, 5, 1, 0),
182 SOC_ENUM("ADC Volume Control Type", pcm3168a_adc_volume_type),
183 SOC_ENUM("ADC Volume Rate Multiplier", pcm3168a_adc_att_mult),
184 SOC_ENUM("ADC Overflow Flag Polarity", pcm3168a_adc_ov_pol),
185 SOC_SINGLE_RANGE_TLV("Master Capture Volume",
186 PCM3168A_ADC_VOL_MASTER, 0, 14, 255, 0,
187 pcm3168a_adc_tlv),
188 SOC_DOUBLE_R_RANGE_TLV("ADC1 Capture Volume",
189 PCM3168A_ADC_VOL_CHAN_START,
190 PCM3168A_ADC_VOL_CHAN_START + 1,
191 0, 14, 255, 0, pcm3168a_adc_tlv),
192 SOC_DOUBLE_R_RANGE_TLV("ADC2 Capture Volume",
193 PCM3168A_ADC_VOL_CHAN_START + 2,
194 PCM3168A_ADC_VOL_CHAN_START + 3,
195 0, 14, 255, 0, pcm3168a_adc_tlv),
196 SOC_DOUBLE_R_RANGE_TLV("ADC3 Capture Volume",
197 PCM3168A_ADC_VOL_CHAN_START + 4,
198 PCM3168A_ADC_VOL_CHAN_START + 5,
199 0, 14, 255, 0, pcm3168a_adc_tlv)
200 };
201
202 static const struct snd_soc_dapm_widget pcm3168a_dapm_widgets[] = {
203 SND_SOC_DAPM_DAC("DAC1", "Playback", PCM3168A_DAC_OP_FLT,
204 PCM3168A_DAC_OPEDA_SHIFT, 1),
205 SND_SOC_DAPM_DAC("DAC2", "Playback", PCM3168A_DAC_OP_FLT,
206 PCM3168A_DAC_OPEDA_SHIFT + 1, 1),
207 SND_SOC_DAPM_DAC("DAC3", "Playback", PCM3168A_DAC_OP_FLT,
208 PCM3168A_DAC_OPEDA_SHIFT + 2, 1),
209 SND_SOC_DAPM_DAC("DAC4", "Playback", PCM3168A_DAC_OP_FLT,
210 PCM3168A_DAC_OPEDA_SHIFT + 3, 1),
211
212 SND_SOC_DAPM_OUTPUT("AOUT1L"),
213 SND_SOC_DAPM_OUTPUT("AOUT1R"),
214 SND_SOC_DAPM_OUTPUT("AOUT2L"),
215 SND_SOC_DAPM_OUTPUT("AOUT2R"),
216 SND_SOC_DAPM_OUTPUT("AOUT3L"),
217 SND_SOC_DAPM_OUTPUT("AOUT3R"),
218 SND_SOC_DAPM_OUTPUT("AOUT4L"),
219 SND_SOC_DAPM_OUTPUT("AOUT4R"),
220
221 SND_SOC_DAPM_ADC("ADC1", "Capture", PCM3168A_ADC_PWR_HPFB,
222 PCM3168A_ADC_PSVAD_SHIFT, 1),
223 SND_SOC_DAPM_ADC("ADC2", "Capture", PCM3168A_ADC_PWR_HPFB,
224 PCM3168A_ADC_PSVAD_SHIFT + 1, 1),
225 SND_SOC_DAPM_ADC("ADC3", "Capture", PCM3168A_ADC_PWR_HPFB,
226 PCM3168A_ADC_PSVAD_SHIFT + 2, 1),
227
228 SND_SOC_DAPM_INPUT("AIN1L"),
229 SND_SOC_DAPM_INPUT("AIN1R"),
230 SND_SOC_DAPM_INPUT("AIN2L"),
231 SND_SOC_DAPM_INPUT("AIN2R"),
232 SND_SOC_DAPM_INPUT("AIN3L"),
233 SND_SOC_DAPM_INPUT("AIN3R")
234 };
235
236 static const struct snd_soc_dapm_route pcm3168a_dapm_routes[] = {
237 /* Playback */
238 { "AOUT1L", NULL, "DAC1" },
239 { "AOUT1R", NULL, "DAC1" },
240
241 { "AOUT2L", NULL, "DAC2" },
242 { "AOUT2R", NULL, "DAC2" },
243
244 { "AOUT3L", NULL, "DAC3" },
245 { "AOUT3R", NULL, "DAC3" },
246
247 { "AOUT4L", NULL, "DAC4" },
248 { "AOUT4R", NULL, "DAC4" },
249
250 /* Capture */
251 { "ADC1", NULL, "AIN1L" },
252 { "ADC1", NULL, "AIN1R" },
253
254 { "ADC2", NULL, "AIN2L" },
255 { "ADC2", NULL, "AIN2R" },
256
257 { "ADC3", NULL, "AIN3L" },
258 { "ADC3", NULL, "AIN3R" }
259 };
260
261 static unsigned int pcm3168a_scki_ratios[] = {
262 768,
263 512,
264 384,
265 256,
266 192,
267 128
268 };
269
270 #define PCM3168A_NUM_SCKI_RATIOS_DAC ARRAY_SIZE(pcm3168a_scki_ratios)
271 #define PCM3168A_NUM_SCKI_RATIOS_ADC (ARRAY_SIZE(pcm3168a_scki_ratios) - 2)
272
273 #define PCM3168A_MAX_SYSCLK 36864000
274
275 static int pcm3168a_reset(struct pcm3168a_priv *pcm3168a)
276 {
277 int ret;
278
279 ret = regmap_write(pcm3168a->regmap, PCM3168A_RST_SMODE, 0);
280 if (ret)
281 return ret;
282
283 /* Internal reset is de-asserted after 3846 SCKI cycles */
284 msleep(DIV_ROUND_UP(3846 * 1000, pcm3168a->sysclk));
285
286 return regmap_write(pcm3168a->regmap, PCM3168A_RST_SMODE,
287 PCM3168A_MRST_MASK | PCM3168A_SRST_MASK);
288 }
289
290 static int pcm3168a_mute(struct snd_soc_dai *dai, int mute, int direction)
291 {
292 struct snd_soc_component *component = dai->component;
293 struct pcm3168a_priv *pcm3168a = snd_soc_component_get_drvdata(component);
294
295 regmap_write(pcm3168a->regmap, PCM3168A_DAC_MUTE, mute ? 0xff : 0);
296
297 return 0;
298 }
299
300 static int pcm3168a_set_dai_sysclk(struct snd_soc_dai *dai,
301 int clk_id, unsigned int freq, int dir)
302 {
303 struct pcm3168a_priv *pcm3168a = snd_soc_component_get_drvdata(dai->component);
304 int ret;
305
306 /*
307 * Some sound card sets 0 Hz as reset,
308 * but it is impossible to set. Ignore it here
309 */
310 if (freq == 0)
311 return 0;
312
313 if (freq > PCM3168A_MAX_SYSCLK)
314 return -EINVAL;
315
316 ret = clk_set_rate(pcm3168a->scki, freq);
317 if (ret)
318 return ret;
319
320 pcm3168a->sysclk = freq;
321
322 return 0;
323 }
324
325 static void pcm3168a_update_fixup_pcm_stream(struct snd_soc_dai *dai)
326 {
327 struct snd_soc_component *component = dai->component;
328 struct pcm3168a_priv *pcm3168a = snd_soc_component_get_drvdata(component);
329 struct pcm3168a_io_params *io_params = &pcm3168a->io_params[dai->id];
330 u64 formats = SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_S24_LE;
331 unsigned int channel_max = dai->id == PCM3168A_DAI_DAC ? 8 : 6;
332
333 if (io_params->format == SND_SOC_DAIFMT_RIGHT_J) {
334 /* S16_LE is only supported in RIGHT_J mode */
335 formats |= SNDRV_PCM_FMTBIT_S16_LE;
336
337 /*
338 * If multi DIN/DOUT is not selected, RIGHT_J can only support
339 * two channels (no TDM support)
340 */
341 if (io_params->tdm_slots != 2)
342 channel_max = 2;
343 }
344
345 if (dai->id == PCM3168A_DAI_DAC) {
346 dai->driver->playback.channels_max = channel_max;
347 dai->driver->playback.formats = formats;
348 } else {
349 dai->driver->capture.channels_max = channel_max;
350 dai->driver->capture.formats = formats;
351 }
352 }
353
354 static int pcm3168a_set_dai_fmt(struct snd_soc_dai *dai, unsigned int format)
355 {
356 struct snd_soc_component *component = dai->component;
357 struct pcm3168a_priv *pcm3168a = snd_soc_component_get_drvdata(component);
358 struct pcm3168a_io_params *io_params = &pcm3168a->io_params[dai->id];
359 bool provider_mode;
360
361 switch (format & SND_SOC_DAIFMT_FORMAT_MASK) {
362 case SND_SOC_DAIFMT_LEFT_J:
363 case SND_SOC_DAIFMT_I2S:
364 case SND_SOC_DAIFMT_RIGHT_J:
365 case SND_SOC_DAIFMT_DSP_A:
366 case SND_SOC_DAIFMT_DSP_B:
367 break;
368 default:
369 dev_err(component->dev, "unsupported dai format\n");
370 return -EINVAL;
371 }
372
373 switch (format & SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) {
374 case SND_SOC_DAIFMT_CBC_CFC:
375 provider_mode = false;
376 break;
377 case SND_SOC_DAIFMT_CBP_CFP:
378 provider_mode = true;
379 break;
380 default:
381 dev_err(component->dev, "unsupported provider mode\n");
382 return -EINVAL;
383 }
384
385 switch (format & SND_SOC_DAIFMT_INV_MASK) {
386 case SND_SOC_DAIFMT_NB_NF:
387 break;
388 default:
389 return -EINVAL;
390 }
391
392 io_params->provider_mode = provider_mode;
393 io_params->format = format & SND_SOC_DAIFMT_FORMAT_MASK;
394
395 pcm3168a_update_fixup_pcm_stream(dai);
396
397 return 0;
398 }
399
400 static int pcm3168a_set_tdm_slot(struct snd_soc_dai *dai, unsigned int tx_mask,
401 unsigned int rx_mask, int slots,
402 int slot_width)
403 {
404 struct snd_soc_component *component = dai->component;
405 struct pcm3168a_priv *pcm3168a = snd_soc_component_get_drvdata(component);
406 struct pcm3168a_io_params *io_params = &pcm3168a->io_params[dai->id];
407
408 if (tx_mask >= (1<<slots) || rx_mask >= (1<<slots)) {
409 dev_err(component->dev,
410 "Bad tdm mask tx: 0x%08x rx: 0x%08x slots %d\n",
411 tx_mask, rx_mask, slots);
412 return -EINVAL;
413 }
414
415 if (slot_width &&
416 (slot_width != 16 && slot_width != 24 && slot_width != 32 )) {
417 dev_err(component->dev, "Unsupported slot_width %d\n",
418 slot_width);
419 return -EINVAL;
420 }
421
422 io_params->tdm_slots = slots;
423 io_params->slot_width = slot_width;
424 /* Ignore the not relevant mask for the DAI/direction */
425 if (dai->id == PCM3168A_DAI_DAC)
426 io_params->tdm_mask = tx_mask;
427 else
428 io_params->tdm_mask = rx_mask;
429
430 pcm3168a_update_fixup_pcm_stream(dai);
431
432 return 0;
433 }
434
435 static int pcm3168a_hw_params(struct snd_pcm_substream *substream,
436 struct snd_pcm_hw_params *params,
437 struct snd_soc_dai *dai)
438 {
439 struct snd_soc_component *component = dai->component;
440 struct pcm3168a_priv *pcm3168a = snd_soc_component_get_drvdata(component);
441 struct pcm3168a_io_params *io_params = &pcm3168a->io_params[dai->id];
442 bool provider_mode, tdm_mode;
443 unsigned int format;
444 unsigned int reg, mask, ms, ms_shift, fmt, fmt_shift, ratio, tdm_slots;
445 int i, num_scki_ratios, slot_width;
446
447 if (dai->id == PCM3168A_DAI_DAC) {
448 num_scki_ratios = PCM3168A_NUM_SCKI_RATIOS_DAC;
449 reg = PCM3168A_DAC_PWR_MST_FMT;
450 mask = PCM3168A_DAC_MSDA_MASK | PCM3168A_DAC_FMT_MASK;
451 ms_shift = PCM3168A_DAC_MSDA_SHIFT;
452 fmt_shift = PCM3168A_DAC_FMT_SHIFT;
453 } else {
454 num_scki_ratios = PCM3168A_NUM_SCKI_RATIOS_ADC;
455 reg = PCM3168A_ADC_MST_FMT;
456 mask = PCM3168A_ADC_MSAD_MASK | PCM3168A_ADC_FMTAD_MASK;
457 ms_shift = PCM3168A_ADC_MSAD_SHIFT;
458 fmt_shift = PCM3168A_ADC_FMTAD_SHIFT;
459 }
460
461 provider_mode = io_params->provider_mode;
462
463 if (provider_mode) {
464 ratio = pcm3168a->sysclk / params_rate(params);
465
466 for (i = 0; i < num_scki_ratios; i++) {
467 if (pcm3168a_scki_ratios[i] == ratio)
468 break;
469 }
470
471 if (i == num_scki_ratios) {
472 dev_err(component->dev, "unsupported sysclk ratio\n");
473 return -EINVAL;
474 }
475
476 ms = (i + 1);
477 } else {
478 ms = 0;
479 }
480
481 format = io_params->format;
482
483 if (io_params->slot_width)
484 slot_width = io_params->slot_width;
485 else
486 slot_width = params_width(params);
487
488 switch (slot_width) {
489 case 16:
490 if (provider_mode || (format != SND_SOC_DAIFMT_RIGHT_J)) {
491 dev_err(component->dev, "16-bit slots are supported only for consumer mode using right justified\n");
492 return -EINVAL;
493 }
494 break;
495 case 24:
496 if (provider_mode || (format == SND_SOC_DAIFMT_DSP_A) ||
497 (format == SND_SOC_DAIFMT_DSP_B)) {
498 dev_err(component->dev, "24-bit slots not supported in provider mode, or consumer mode using DSP\n");
499 return -EINVAL;
500 }
501 break;
502 case 32:
503 break;
504 default:
505 dev_err(component->dev, "unsupported frame size: %d\n", slot_width);
506 return -EINVAL;
507 }
508
509 if (io_params->tdm_slots)
510 tdm_slots = io_params->tdm_slots;
511 else
512 tdm_slots = params_channels(params);
513
514 /*
515 * Switch the codec to TDM mode when more than 2 TDM slots are needed
516 * for the stream.
517 * If pcm3168a->tdm_slots is not set or set to more than 2 (8/6 usually)
518 * then DIN1/DOUT1 is used in TDM mode.
519 * If pcm3168a->tdm_slots is set to 2 then DIN1/2/3/4 and DOUT1/2/3 is
520 * used in normal mode, no need to switch to TDM modes.
521 */
522 tdm_mode = (tdm_slots > 2);
523
524 if (tdm_mode) {
525 switch (format) {
526 case SND_SOC_DAIFMT_I2S:
527 case SND_SOC_DAIFMT_DSP_A:
528 case SND_SOC_DAIFMT_LEFT_J:
529 case SND_SOC_DAIFMT_DSP_B:
530 break;
531 default:
532 dev_err(component->dev,
533 "TDM is supported under DSP/I2S/Left_J only\n");
534 return -EINVAL;
535 }
536 }
537
538 switch (format) {
539 case SND_SOC_DAIFMT_I2S:
540 fmt = tdm_mode ? PCM3168A_FMT_I2S_TDM : PCM3168A_FMT_I2S;
541 break;
542 case SND_SOC_DAIFMT_LEFT_J:
543 fmt = tdm_mode ? PCM3168A_FMT_LEFT_J_TDM : PCM3168A_FMT_LEFT_J;
544 break;
545 case SND_SOC_DAIFMT_RIGHT_J:
546 fmt = (slot_width == 16) ? PCM3168A_FMT_RIGHT_J_16 :
547 PCM3168A_FMT_RIGHT_J;
548 break;
549 case SND_SOC_DAIFMT_DSP_A:
550 fmt = tdm_mode ? PCM3168A_FMT_I2S_TDM : PCM3168A_FMT_DSP_A;
551 break;
552 case SND_SOC_DAIFMT_DSP_B:
553 fmt = tdm_mode ? PCM3168A_FMT_LEFT_J_TDM : PCM3168A_FMT_DSP_B;
554 break;
555 default:
556 return -EINVAL;
557 }
558
559 regmap_update_bits(pcm3168a->regmap, reg, mask,
560 (ms << ms_shift) | (fmt << fmt_shift));
561
562 return 0;
563 }
564
565 static const u64 pcm3168a_dai_formats[] = {
566 /*
567 * Select below from Sound Card, not here
568 * SND_SOC_DAIFMT_CBC_CFC
569 * SND_SOC_DAIFMT_CBP_CFP
570 */
571
572 /*
573 * First Priority
574 */
575 SND_SOC_POSSIBLE_DAIFMT_I2S |
576 SND_SOC_POSSIBLE_DAIFMT_LEFT_J,
577 /*
578 * Second Priority
579 *
580 * These have picky limitation.
581 * see
582 * pcm3168a_hw_params()
583 */
584 SND_SOC_POSSIBLE_DAIFMT_RIGHT_J |
585 SND_SOC_POSSIBLE_DAIFMT_DSP_A |
586 SND_SOC_POSSIBLE_DAIFMT_DSP_B,
587 };
588
589 static const struct snd_soc_dai_ops pcm3168a_dai_ops = {
590 .set_fmt = pcm3168a_set_dai_fmt,
591 .set_sysclk = pcm3168a_set_dai_sysclk,
592 .hw_params = pcm3168a_hw_params,
593 .mute_stream = pcm3168a_mute,
594 .set_tdm_slot = pcm3168a_set_tdm_slot,
595 .no_capture_mute = 1,
596 .auto_selectable_formats = pcm3168a_dai_formats,
597 .num_auto_selectable_formats = ARRAY_SIZE(pcm3168a_dai_formats),
598 };
599
600 static struct snd_soc_dai_driver pcm3168a_dais[] = {
601 {
602 .name = "pcm3168a-dac",
603 .id = PCM3168A_DAI_DAC,
604 .playback = {
605 .stream_name = "Playback",
606 .channels_min = 1,
607 .channels_max = 8,
608 .rates = SNDRV_PCM_RATE_8000_192000,
609 .formats = PCM3168A_FORMATS
610 },
611 .ops = &pcm3168a_dai_ops
612 },
613 {
614 .name = "pcm3168a-adc",
615 .id = PCM3168A_DAI_ADC,
616 .capture = {
617 .stream_name = "Capture",
618 .channels_min = 1,
619 .channels_max = 6,
620 .rates = SNDRV_PCM_RATE_8000_96000,
621 .formats = PCM3168A_FORMATS
622 },
623 .ops = &pcm3168a_dai_ops
624 },
625 };
626
627 static const struct reg_default pcm3168a_reg_default[] = {
628 { PCM3168A_RST_SMODE, PCM3168A_MRST_MASK | PCM3168A_SRST_MASK },
629 { PCM3168A_DAC_PWR_MST_FMT, 0x00 },
630 { PCM3168A_DAC_OP_FLT, 0x00 },
631 { PCM3168A_DAC_INV, 0x00 },
632 { PCM3168A_DAC_MUTE, 0x00 },
633 { PCM3168A_DAC_ZERO, 0x00 },
634 { PCM3168A_DAC_ATT_DEMP_ZF, 0x00 },
635 { PCM3168A_DAC_VOL_MASTER, 0xff },
636 { PCM3168A_DAC_VOL_CHAN_START, 0xff },
637 { PCM3168A_DAC_VOL_CHAN_START + 1, 0xff },
638 { PCM3168A_DAC_VOL_CHAN_START + 2, 0xff },
639 { PCM3168A_DAC_VOL_CHAN_START + 3, 0xff },
640 { PCM3168A_DAC_VOL_CHAN_START + 4, 0xff },
641 { PCM3168A_DAC_VOL_CHAN_START + 5, 0xff },
642 { PCM3168A_DAC_VOL_CHAN_START + 6, 0xff },
643 { PCM3168A_DAC_VOL_CHAN_START + 7, 0xff },
644 { PCM3168A_ADC_SMODE, 0x00 },
645 { PCM3168A_ADC_MST_FMT, 0x00 },
646 { PCM3168A_ADC_PWR_HPFB, 0x00 },
647 { PCM3168A_ADC_SEAD, 0x00 },
648 { PCM3168A_ADC_INV, 0x00 },
649 { PCM3168A_ADC_MUTE, 0x00 },
650 { PCM3168A_ADC_OV, 0x00 },
651 { PCM3168A_ADC_ATT_OVF, 0x00 },
652 { PCM3168A_ADC_VOL_MASTER, 0xd3 },
653 { PCM3168A_ADC_VOL_CHAN_START, 0xd3 },
654 { PCM3168A_ADC_VOL_CHAN_START + 1, 0xd3 },
655 { PCM3168A_ADC_VOL_CHAN_START + 2, 0xd3 },
656 { PCM3168A_ADC_VOL_CHAN_START + 3, 0xd3 },
657 { PCM3168A_ADC_VOL_CHAN_START + 4, 0xd3 },
658 { PCM3168A_ADC_VOL_CHAN_START + 5, 0xd3 }
659 };
660
661 static bool pcm3168a_readable_register(struct device *dev, unsigned int reg)
662 {
663 if (reg >= PCM3168A_RST_SMODE)
664 return true;
665 else
666 return false;
667 }
668
669 static bool pcm3168a_volatile_register(struct device *dev, unsigned int reg)
670 {
671 switch (reg) {
672 case PCM3168A_RST_SMODE:
673 case PCM3168A_DAC_ZERO:
674 case PCM3168A_ADC_OV:
675 return true;
676 default:
677 return false;
678 }
679 }
680
681 static bool pcm3168a_writeable_register(struct device *dev, unsigned int reg)
682 {
683 if (reg < PCM3168A_RST_SMODE)
684 return false;
685
686 switch (reg) {
687 case PCM3168A_DAC_ZERO:
688 case PCM3168A_ADC_OV:
689 return false;
690 default:
691 return true;
692 }
693 }
694
695 const struct regmap_config pcm3168a_regmap = {
696 .reg_bits = 8,
697 .val_bits = 8,
698
699 .max_register = PCM3168A_ADC_VOL_CHAN_START + 5,
700 .reg_defaults = pcm3168a_reg_default,
701 .num_reg_defaults = ARRAY_SIZE(pcm3168a_reg_default),
702 .readable_reg = pcm3168a_readable_register,
703 .volatile_reg = pcm3168a_volatile_register,
704 .writeable_reg = pcm3168a_writeable_register,
705 .cache_type = REGCACHE_FLAT
706 };
707 EXPORT_SYMBOL_GPL(pcm3168a_regmap);
708
709 static const struct snd_soc_component_driver pcm3168a_driver = {
710 .controls = pcm3168a_snd_controls,
711 .num_controls = ARRAY_SIZE(pcm3168a_snd_controls),
712 .dapm_widgets = pcm3168a_dapm_widgets,
713 .num_dapm_widgets = ARRAY_SIZE(pcm3168a_dapm_widgets),
714 .dapm_routes = pcm3168a_dapm_routes,
715 .num_dapm_routes = ARRAY_SIZE(pcm3168a_dapm_routes),
716 .use_pmdown_time = 1,
717 .endianness = 1,
718 };
719
720 int pcm3168a_probe(struct device *dev, struct regmap *regmap)
721 {
722 struct pcm3168a_priv *pcm3168a;
723 int ret, i;
724
725 pcm3168a = devm_kzalloc(dev, sizeof(*pcm3168a), GFP_KERNEL);
726 if (pcm3168a == NULL)
727 return -ENOMEM;
728
729 dev_set_drvdata(dev, pcm3168a);
730
731 /*
732 * Request the reset (connected to RST pin) gpio line as non exclusive
733 * as the same reset line might be connected to multiple pcm3168a codec
734 *
735 * The RST is low active, we want the GPIO line to be high initially, so
736 * request the initial level to LOW which in practice means DEASSERTED:
737 * The deasserted level of GPIO_ACTIVE_LOW is HIGH.
738 */
739 pcm3168a->gpio_rst = devm_gpiod_get_optional(dev, "reset",
740 GPIOD_OUT_LOW |
741 GPIOD_FLAGS_BIT_NONEXCLUSIVE);
742 if (IS_ERR(pcm3168a->gpio_rst))
743 return dev_err_probe(dev, PTR_ERR(pcm3168a->gpio_rst),
744 "failed to acquire RST gpio\n");
745
746 pcm3168a->scki = devm_clk_get(dev, "scki");
747 if (IS_ERR(pcm3168a->scki))
748 return dev_err_probe(dev, PTR_ERR(pcm3168a->scki),
749 "failed to acquire clock 'scki'\n");
750
751 ret = clk_prepare_enable(pcm3168a->scki);
752 if (ret) {
753 dev_err(dev, "Failed to enable mclk: %d\n", ret);
754 return ret;
755 }
756
757 pcm3168a->sysclk = clk_get_rate(pcm3168a->scki);
758
759 for (i = 0; i < ARRAY_SIZE(pcm3168a->supplies); i++)
760 pcm3168a->supplies[i].supply = pcm3168a_supply_names[i];
761
762 ret = devm_regulator_bulk_get(dev,
763 ARRAY_SIZE(pcm3168a->supplies), pcm3168a->supplies);
764 if (ret) {
765 dev_err_probe(dev, ret, "failed to request supplies\n");
766 goto err_clk;
767 }
768
769 ret = regulator_bulk_enable(ARRAY_SIZE(pcm3168a->supplies),
770 pcm3168a->supplies);
771 if (ret) {
772 dev_err(dev, "failed to enable supplies: %d\n", ret);
773 goto err_clk;
774 }
775
776 pcm3168a->regmap = regmap;
777 if (IS_ERR(pcm3168a->regmap)) {
778 ret = PTR_ERR(pcm3168a->regmap);
779 dev_err(dev, "failed to allocate regmap: %d\n", ret);
780 goto err_regulator;
781 }
782
783 if (pcm3168a->gpio_rst) {
784 /*
785 * The device is taken out from reset via GPIO line, wait for
786 * 3846 SCKI clock cycles for the internal reset de-assertion
787 */
788 msleep(DIV_ROUND_UP(3846 * 1000, pcm3168a->sysclk));
789 } else {
790 ret = pcm3168a_reset(pcm3168a);
791 if (ret) {
792 dev_err(dev, "Failed to reset device: %d\n", ret);
793 goto err_regulator;
794 }
795 }
796
797 pm_runtime_set_active(dev);
798 pm_runtime_enable(dev);
799 pm_runtime_idle(dev);
800
801 memcpy(pcm3168a->dai_drv, pcm3168a_dais, sizeof(pcm3168a->dai_drv));
802 ret = devm_snd_soc_register_component(dev, &pcm3168a_driver,
803 pcm3168a->dai_drv,
804 ARRAY_SIZE(pcm3168a->dai_drv));
805 if (ret) {
806 dev_err(dev, "failed to register component: %d\n", ret);
807 goto err_regulator;
808 }
809
810 return 0;
811
812 err_regulator:
813 regulator_bulk_disable(ARRAY_SIZE(pcm3168a->supplies),
814 pcm3168a->supplies);
815 err_clk:
816 clk_disable_unprepare(pcm3168a->scki);
817
818 return ret;
819 }
820 EXPORT_SYMBOL_GPL(pcm3168a_probe);
821
822 static void pcm3168a_disable(struct device *dev)
823 {
824 struct pcm3168a_priv *pcm3168a = dev_get_drvdata(dev);
825
826 regulator_bulk_disable(ARRAY_SIZE(pcm3168a->supplies),
827 pcm3168a->supplies);
828 clk_disable_unprepare(pcm3168a->scki);
829 }
830
831 void pcm3168a_remove(struct device *dev)
832 {
833 struct pcm3168a_priv *pcm3168a = dev_get_drvdata(dev);
834
835 /*
836 * The RST is low active, we want the GPIO line to be low when the
837 * driver is removed, so set level to 1 which in practice means
838 * ASSERTED:
839 * The asserted level of GPIO_ACTIVE_LOW is LOW.
840 */
841 gpiod_set_value_cansleep(pcm3168a->gpio_rst, 1);
842 pm_runtime_disable(dev);
843 #ifndef CONFIG_PM
844 pcm3168a_disable(dev);
845 #endif
846 }
847 EXPORT_SYMBOL_GPL(pcm3168a_remove);
848
849 #ifdef CONFIG_PM
850 static int pcm3168a_rt_resume(struct device *dev)
851 {
852 struct pcm3168a_priv *pcm3168a = dev_get_drvdata(dev);
853 int ret;
854
855 ret = clk_prepare_enable(pcm3168a->scki);
856 if (ret) {
857 dev_err(dev, "Failed to enable mclk: %d\n", ret);
858 return ret;
859 }
860
861 ret = regulator_bulk_enable(ARRAY_SIZE(pcm3168a->supplies),
862 pcm3168a->supplies);
863 if (ret) {
864 dev_err(dev, "Failed to enable supplies: %d\n", ret);
865 goto err_clk;
866 }
867
868 ret = pcm3168a_reset(pcm3168a);
869 if (ret) {
870 dev_err(dev, "Failed to reset device: %d\n", ret);
871 goto err_regulator;
872 }
873
874 regcache_cache_only(pcm3168a->regmap, false);
875
876 regcache_mark_dirty(pcm3168a->regmap);
877
878 ret = regcache_sync(pcm3168a->regmap);
879 if (ret) {
880 dev_err(dev, "Failed to sync regmap: %d\n", ret);
881 goto err_regulator;
882 }
883
884 return 0;
885
886 err_regulator:
887 regulator_bulk_disable(ARRAY_SIZE(pcm3168a->supplies),
888 pcm3168a->supplies);
889 err_clk:
890 clk_disable_unprepare(pcm3168a->scki);
891
892 return ret;
893 }
894
895 static int pcm3168a_rt_suspend(struct device *dev)
896 {
897 struct pcm3168a_priv *pcm3168a = dev_get_drvdata(dev);
898
899 regcache_cache_only(pcm3168a->regmap, true);
900
901 pcm3168a_disable(dev);
902
903 return 0;
904 }
905 #endif
906
907 const struct dev_pm_ops pcm3168a_pm_ops = {
908 SET_RUNTIME_PM_OPS(pcm3168a_rt_suspend, pcm3168a_rt_resume, NULL)
909 };
910 EXPORT_SYMBOL_GPL(pcm3168a_pm_ops);
911
912 MODULE_DESCRIPTION("PCM3168A codec driver");
913 MODULE_AUTHOR("Damien Horsley <Damien.Horsley@imgtec.com>");
914 MODULE_LICENSE("GPL v2");
915
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