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treewide: remove redundant IS_ERR() before error code check
[linux/fpc-iii.git] / sound / soc / codecs / pcm3168a.c
blob9711fab296ebc44a5aa469fd498a0cae952007b3
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/of_gpio.h>
15 #include <linux/pm_runtime.h>
16 #include <linux/regulator/consumer.h>
17
18 #include <sound/pcm_params.h>
19 #include <sound/soc.h>
20 #include <sound/tlv.h>
21
22 #include "pcm3168a.h"
23
24 #define PCM3168A_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | \
25 SNDRV_PCM_FMTBIT_S24_3LE | \
26 SNDRV_PCM_FMTBIT_S24_LE)
27
28 #define PCM3168A_FMT_I2S 0x0
29 #define PCM3168A_FMT_LEFT_J 0x1
30 #define PCM3168A_FMT_RIGHT_J 0x2
31 #define PCM3168A_FMT_RIGHT_J_16 0x3
32 #define PCM3168A_FMT_DSP_A 0x4
33 #define PCM3168A_FMT_DSP_B 0x5
34 #define PCM3168A_FMT_I2S_TDM 0x6
35 #define PCM3168A_FMT_LEFT_J_TDM 0x7
36 #define PCM3168A_FMT_DSP_MASK 0x4
37
38 #define PCM3168A_NUM_SUPPLIES 6
39 static const char *const pcm3168a_supply_names[PCM3168A_NUM_SUPPLIES] = {
40 "VDD1",
41 "VDD2",
42 "VCCAD1",
43 "VCCAD2",
44 "VCCDA1",
45 "VCCDA2"
46 };
47
48 #define PCM3168A_DAI_DAC 0
49 #define PCM3168A_DAI_ADC 1
50
51 /* ADC/DAC side parameters */
52 struct pcm3168a_io_params {
53 bool master_mode;
54 unsigned int fmt;
55 int tdm_slots;
56 u32 tdm_mask;
57 int slot_width;
58 };
59
60 struct pcm3168a_priv {
61 struct regulator_bulk_data supplies[PCM3168A_NUM_SUPPLIES];
62 struct regmap *regmap;
63 struct clk *scki;
64 struct gpio_desc *gpio_rst;
65 unsigned long sysclk;
66
67 struct pcm3168a_io_params io_params[2];
68 struct snd_soc_dai_driver dai_drv[2];
69 };
70
71 static const char *const pcm3168a_roll_off[] = { "Sharp", "Slow" };
72
73 static SOC_ENUM_SINGLE_DECL(pcm3168a_d1_roll_off, PCM3168A_DAC_OP_FLT,
74 PCM3168A_DAC_FLT_SHIFT, pcm3168a_roll_off);
75 static SOC_ENUM_SINGLE_DECL(pcm3168a_d2_roll_off, PCM3168A_DAC_OP_FLT,
76 PCM3168A_DAC_FLT_SHIFT + 1, pcm3168a_roll_off);
77 static SOC_ENUM_SINGLE_DECL(pcm3168a_d3_roll_off, PCM3168A_DAC_OP_FLT,
78 PCM3168A_DAC_FLT_SHIFT + 2, pcm3168a_roll_off);
79 static SOC_ENUM_SINGLE_DECL(pcm3168a_d4_roll_off, PCM3168A_DAC_OP_FLT,
80 PCM3168A_DAC_FLT_SHIFT + 3, pcm3168a_roll_off);
81
82 static const char *const pcm3168a_volume_type[] = {
83 "Individual", "Master + Individual" };
84
85 static SOC_ENUM_SINGLE_DECL(pcm3168a_dac_volume_type, PCM3168A_DAC_ATT_DEMP_ZF,
86 PCM3168A_DAC_ATMDDA_SHIFT, pcm3168a_volume_type);
87
88 static const char *const pcm3168a_att_speed_mult[] = { "2048", "4096" };
89
90 static SOC_ENUM_SINGLE_DECL(pcm3168a_dac_att_mult, PCM3168A_DAC_ATT_DEMP_ZF,
91 PCM3168A_DAC_ATSPDA_SHIFT, pcm3168a_att_speed_mult);
92
93 static const char *const pcm3168a_demp[] = {
94 "Disabled", "48khz", "44.1khz", "32khz" };
95
96 static SOC_ENUM_SINGLE_DECL(pcm3168a_dac_demp, PCM3168A_DAC_ATT_DEMP_ZF,
97 PCM3168A_DAC_DEMP_SHIFT, pcm3168a_demp);
98
99 static const char *const pcm3168a_zf_func[] = {
100 "DAC 1/2/3/4 AND", "DAC 1/2/3/4 OR", "DAC 1/2/3 AND",
101 "DAC 1/2/3 OR", "DAC 4 AND", "DAC 4 OR" };
102
103 static SOC_ENUM_SINGLE_DECL(pcm3168a_dac_zf_func, PCM3168A_DAC_ATT_DEMP_ZF,
104 PCM3168A_DAC_AZRO_SHIFT, pcm3168a_zf_func);
105
106 static const char *const pcm3168a_pol[] = { "Active High", "Active Low" };
107
108 static SOC_ENUM_SINGLE_DECL(pcm3168a_dac_zf_pol, PCM3168A_DAC_ATT_DEMP_ZF,
109 PCM3168A_DAC_ATSPDA_SHIFT, pcm3168a_pol);
110
111 static const char *const pcm3168a_con[] = { "Differential", "Single-Ended" };
112
113 static SOC_ENUM_DOUBLE_DECL(pcm3168a_adc1_con, PCM3168A_ADC_SEAD,
114 0, 1, pcm3168a_con);
115 static SOC_ENUM_DOUBLE_DECL(pcm3168a_adc2_con, PCM3168A_ADC_SEAD,
116 2, 3, pcm3168a_con);
117 static SOC_ENUM_DOUBLE_DECL(pcm3168a_adc3_con, PCM3168A_ADC_SEAD,
118 4, 5, pcm3168a_con);
119
120 static SOC_ENUM_SINGLE_DECL(pcm3168a_adc_volume_type, PCM3168A_ADC_ATT_OVF,
121 PCM3168A_ADC_ATMDAD_SHIFT, pcm3168a_volume_type);
122
123 static SOC_ENUM_SINGLE_DECL(pcm3168a_adc_att_mult, PCM3168A_ADC_ATT_OVF,
124 PCM3168A_ADC_ATSPAD_SHIFT, pcm3168a_att_speed_mult);
125
126 static SOC_ENUM_SINGLE_DECL(pcm3168a_adc_ov_pol, PCM3168A_ADC_ATT_OVF,
127 PCM3168A_ADC_OVFP_SHIFT, pcm3168a_pol);
128
129 /* -100db to 0db, register values 0-54 cause mute */
130 static const DECLARE_TLV_DB_SCALE(pcm3168a_dac_tlv, -10050, 50, 1);
131
132 /* -100db to 20db, register values 0-14 cause mute */
133 static const DECLARE_TLV_DB_SCALE(pcm3168a_adc_tlv, -10050, 50, 1);
134
135 static const struct snd_kcontrol_new pcm3168a_snd_controls[] = {
136 SOC_SINGLE("DAC Power-Save Switch", PCM3168A_DAC_PWR_MST_FMT,
137 PCM3168A_DAC_PSMDA_SHIFT, 1, 1),
138 SOC_ENUM("DAC1 Digital Filter roll-off", pcm3168a_d1_roll_off),
139 SOC_ENUM("DAC2 Digital Filter roll-off", pcm3168a_d2_roll_off),
140 SOC_ENUM("DAC3 Digital Filter roll-off", pcm3168a_d3_roll_off),
141 SOC_ENUM("DAC4 Digital Filter roll-off", pcm3168a_d4_roll_off),
142 SOC_DOUBLE("DAC1 Invert Switch", PCM3168A_DAC_INV, 0, 1, 1, 0),
143 SOC_DOUBLE("DAC2 Invert Switch", PCM3168A_DAC_INV, 2, 3, 1, 0),
144 SOC_DOUBLE("DAC3 Invert Switch", PCM3168A_DAC_INV, 4, 5, 1, 0),
145 SOC_DOUBLE("DAC4 Invert Switch", PCM3168A_DAC_INV, 6, 7, 1, 0),
146 SOC_ENUM("DAC Volume Control Type", pcm3168a_dac_volume_type),
147 SOC_ENUM("DAC Volume Rate Multiplier", pcm3168a_dac_att_mult),
148 SOC_ENUM("DAC De-Emphasis", pcm3168a_dac_demp),
149 SOC_ENUM("DAC Zero Flag Function", pcm3168a_dac_zf_func),
150 SOC_ENUM("DAC Zero Flag Polarity", pcm3168a_dac_zf_pol),
151 SOC_SINGLE_RANGE_TLV("Master Playback Volume",
152 PCM3168A_DAC_VOL_MASTER, 0, 54, 255, 0,
153 pcm3168a_dac_tlv),
154 SOC_DOUBLE_R_RANGE_TLV("DAC1 Playback Volume",
155 PCM3168A_DAC_VOL_CHAN_START,
156 PCM3168A_DAC_VOL_CHAN_START + 1,
157 0, 54, 255, 0, pcm3168a_dac_tlv),
158 SOC_DOUBLE_R_RANGE_TLV("DAC2 Playback Volume",
159 PCM3168A_DAC_VOL_CHAN_START + 2,
160 PCM3168A_DAC_VOL_CHAN_START + 3,
161 0, 54, 255, 0, pcm3168a_dac_tlv),
162 SOC_DOUBLE_R_RANGE_TLV("DAC3 Playback Volume",
163 PCM3168A_DAC_VOL_CHAN_START + 4,
164 PCM3168A_DAC_VOL_CHAN_START + 5,
165 0, 54, 255, 0, pcm3168a_dac_tlv),
166 SOC_DOUBLE_R_RANGE_TLV("DAC4 Playback Volume",
167 PCM3168A_DAC_VOL_CHAN_START + 6,
168 PCM3168A_DAC_VOL_CHAN_START + 7,
169 0, 54, 255, 0, pcm3168a_dac_tlv),
170 SOC_SINGLE("ADC1 High-Pass Filter Switch", PCM3168A_ADC_PWR_HPFB,
171 PCM3168A_ADC_BYP_SHIFT, 1, 1),
172 SOC_SINGLE("ADC2 High-Pass Filter Switch", PCM3168A_ADC_PWR_HPFB,
173 PCM3168A_ADC_BYP_SHIFT + 1, 1, 1),
174 SOC_SINGLE("ADC3 High-Pass Filter Switch", PCM3168A_ADC_PWR_HPFB,
175 PCM3168A_ADC_BYP_SHIFT + 2, 1, 1),
176 SOC_ENUM("ADC1 Connection Type", pcm3168a_adc1_con),
177 SOC_ENUM("ADC2 Connection Type", pcm3168a_adc2_con),
178 SOC_ENUM("ADC3 Connection Type", pcm3168a_adc3_con),
179 SOC_DOUBLE("ADC1 Invert Switch", PCM3168A_ADC_INV, 0, 1, 1, 0),
180 SOC_DOUBLE("ADC2 Invert Switch", PCM3168A_ADC_INV, 2, 3, 1, 0),
181 SOC_DOUBLE("ADC3 Invert Switch", PCM3168A_ADC_INV, 4, 5, 1, 0),
182 SOC_DOUBLE("ADC1 Mute Switch", PCM3168A_ADC_MUTE, 0, 1, 1, 0),
183 SOC_DOUBLE("ADC2 Mute Switch", PCM3168A_ADC_MUTE, 2, 3, 1, 0),
184 SOC_DOUBLE("ADC3 Mute Switch", PCM3168A_ADC_MUTE, 4, 5, 1, 0),
185 SOC_ENUM("ADC Volume Control Type", pcm3168a_adc_volume_type),
186 SOC_ENUM("ADC Volume Rate Multiplier", pcm3168a_adc_att_mult),
187 SOC_ENUM("ADC Overflow Flag Polarity", pcm3168a_adc_ov_pol),
188 SOC_SINGLE_RANGE_TLV("Master Capture Volume",
189 PCM3168A_ADC_VOL_MASTER, 0, 14, 255, 0,
190 pcm3168a_adc_tlv),
191 SOC_DOUBLE_R_RANGE_TLV("ADC1 Capture Volume",
192 PCM3168A_ADC_VOL_CHAN_START,
193 PCM3168A_ADC_VOL_CHAN_START + 1,
194 0, 14, 255, 0, pcm3168a_adc_tlv),
195 SOC_DOUBLE_R_RANGE_TLV("ADC2 Capture Volume",
196 PCM3168A_ADC_VOL_CHAN_START + 2,
197 PCM3168A_ADC_VOL_CHAN_START + 3,
198 0, 14, 255, 0, pcm3168a_adc_tlv),
199 SOC_DOUBLE_R_RANGE_TLV("ADC3 Capture Volume",
200 PCM3168A_ADC_VOL_CHAN_START + 4,
201 PCM3168A_ADC_VOL_CHAN_START + 5,
202 0, 14, 255, 0, pcm3168a_adc_tlv)
203 };
204
205 static const struct snd_soc_dapm_widget pcm3168a_dapm_widgets[] = {
206 SND_SOC_DAPM_DAC("DAC1", "Playback", PCM3168A_DAC_OP_FLT,
207 PCM3168A_DAC_OPEDA_SHIFT, 1),
208 SND_SOC_DAPM_DAC("DAC2", "Playback", PCM3168A_DAC_OP_FLT,
209 PCM3168A_DAC_OPEDA_SHIFT + 1, 1),
210 SND_SOC_DAPM_DAC("DAC3", "Playback", PCM3168A_DAC_OP_FLT,
211 PCM3168A_DAC_OPEDA_SHIFT + 2, 1),
212 SND_SOC_DAPM_DAC("DAC4", "Playback", PCM3168A_DAC_OP_FLT,
213 PCM3168A_DAC_OPEDA_SHIFT + 3, 1),
214
215 SND_SOC_DAPM_OUTPUT("AOUT1L"),
216 SND_SOC_DAPM_OUTPUT("AOUT1R"),
217 SND_SOC_DAPM_OUTPUT("AOUT2L"),
218 SND_SOC_DAPM_OUTPUT("AOUT2R"),
219 SND_SOC_DAPM_OUTPUT("AOUT3L"),
220 SND_SOC_DAPM_OUTPUT("AOUT3R"),
221 SND_SOC_DAPM_OUTPUT("AOUT4L"),
222 SND_SOC_DAPM_OUTPUT("AOUT4R"),
223
224 SND_SOC_DAPM_ADC("ADC1", "Capture", PCM3168A_ADC_PWR_HPFB,
225 PCM3168A_ADC_PSVAD_SHIFT, 1),
226 SND_SOC_DAPM_ADC("ADC2", "Capture", PCM3168A_ADC_PWR_HPFB,
227 PCM3168A_ADC_PSVAD_SHIFT + 1, 1),
228 SND_SOC_DAPM_ADC("ADC3", "Capture", PCM3168A_ADC_PWR_HPFB,
229 PCM3168A_ADC_PSVAD_SHIFT + 2, 1),
230
231 SND_SOC_DAPM_INPUT("AIN1L"),
232 SND_SOC_DAPM_INPUT("AIN1R"),
233 SND_SOC_DAPM_INPUT("AIN2L"),
234 SND_SOC_DAPM_INPUT("AIN2R"),
235 SND_SOC_DAPM_INPUT("AIN3L"),
236 SND_SOC_DAPM_INPUT("AIN3R")
237 };
238
239 static const struct snd_soc_dapm_route pcm3168a_dapm_routes[] = {
240 /* Playback */
241 { "AOUT1L", NULL, "DAC1" },
242 { "AOUT1R", NULL, "DAC1" },
243
244 { "AOUT2L", NULL, "DAC2" },
245 { "AOUT2R", NULL, "DAC2" },
246
247 { "AOUT3L", NULL, "DAC3" },
248 { "AOUT3R", NULL, "DAC3" },
249
250 { "AOUT4L", NULL, "DAC4" },
251 { "AOUT4R", NULL, "DAC4" },
252
253 /* Capture */
254 { "ADC1", NULL, "AIN1L" },
255 { "ADC1", NULL, "AIN1R" },
256
257 { "ADC2", NULL, "AIN2L" },
258 { "ADC2", NULL, "AIN2R" },
259
260 { "ADC3", NULL, "AIN3L" },
261 { "ADC3", NULL, "AIN3R" }
262 };
263
264 static unsigned int pcm3168a_scki_ratios[] = {
265 768,
266 512,
267 384,
268 256,
269 192,
270 128
271 };
272
273 #define PCM3168A_NUM_SCKI_RATIOS_DAC ARRAY_SIZE(pcm3168a_scki_ratios)
274 #define PCM3168A_NUM_SCKI_RATIOS_ADC (ARRAY_SIZE(pcm3168a_scki_ratios) - 2)
275
276 #define PCM3168A_MAX_SYSCLK 36864000
277
278 static int pcm3168a_reset(struct pcm3168a_priv *pcm3168a)
279 {
280 int ret;
281
282 ret = regmap_write(pcm3168a->regmap, PCM3168A_RST_SMODE, 0);
283 if (ret)
284 return ret;
285
286 /* Internal reset is de-asserted after 3846 SCKI cycles */
287 msleep(DIV_ROUND_UP(3846 * 1000, pcm3168a->sysclk));
288
289 return regmap_write(pcm3168a->regmap, PCM3168A_RST_SMODE,
290 PCM3168A_MRST_MASK | PCM3168A_SRST_MASK);
291 }
292
293 static int pcm3168a_digital_mute(struct snd_soc_dai *dai, int mute)
294 {
295 struct snd_soc_component *component = dai->component;
296 struct pcm3168a_priv *pcm3168a = snd_soc_component_get_drvdata(component);
297
298 regmap_write(pcm3168a->regmap, PCM3168A_DAC_MUTE, mute ? 0xff : 0);
299
300 return 0;
301 }
302
303 static int pcm3168a_set_dai_sysclk(struct snd_soc_dai *dai,
304 int clk_id, unsigned int freq, int dir)
305 {
306 struct pcm3168a_priv *pcm3168a = snd_soc_component_get_drvdata(dai->component);
307 int ret;
308
309 if (freq > PCM3168A_MAX_SYSCLK)
310 return -EINVAL;
311
312 ret = clk_set_rate(pcm3168a->scki, freq);
313 if (ret)
314 return ret;
315
316 pcm3168a->sysclk = freq;
317
318 return 0;
319 }
320
321 static void pcm3168a_update_fixup_pcm_stream(struct snd_soc_dai *dai)
322 {
323 struct snd_soc_component *component = dai->component;
324 struct pcm3168a_priv *pcm3168a = snd_soc_component_get_drvdata(component);
325 u64 formats = SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_S24_LE;
326 unsigned int channel_max = dai->id == PCM3168A_DAI_DAC ? 8 : 6;
327
328 if (pcm3168a->io_params[dai->id].fmt == PCM3168A_FMT_RIGHT_J) {
329 /* S16_LE is only supported in RIGHT_J mode */
330 formats |= SNDRV_PCM_FMTBIT_S16_LE;
331
332 /*
333 * If multi DIN/DOUT is not selected, RIGHT_J can only support
334 * two channels (no TDM support)
335 */
336 if (pcm3168a->io_params[dai->id].tdm_slots != 2)
337 channel_max = 2;
338 }
339
340 if (dai->id == PCM3168A_DAI_DAC) {
341 dai->driver->playback.channels_max = channel_max;
342 dai->driver->playback.formats = formats;
343 } else {
344 dai->driver->capture.channels_max = channel_max;
345 dai->driver->capture.formats = formats;
346 }
347 }
348
349 static int pcm3168a_set_dai_fmt(struct snd_soc_dai *dai, unsigned int format)
350 {
351 struct snd_soc_component *component = dai->component;
352 struct pcm3168a_priv *pcm3168a = snd_soc_component_get_drvdata(component);
353 u32 fmt, reg, mask, shift;
354 bool master_mode;
355
356 switch (format & SND_SOC_DAIFMT_FORMAT_MASK) {
357 case SND_SOC_DAIFMT_LEFT_J:
358 fmt = PCM3168A_FMT_LEFT_J;
359 break;
360 case SND_SOC_DAIFMT_I2S:
361 fmt = PCM3168A_FMT_I2S;
362 break;
363 case SND_SOC_DAIFMT_RIGHT_J:
364 fmt = PCM3168A_FMT_RIGHT_J;
365 break;
366 case SND_SOC_DAIFMT_DSP_A:
367 fmt = PCM3168A_FMT_DSP_A;
368 break;
369 case SND_SOC_DAIFMT_DSP_B:
370 fmt = PCM3168A_FMT_DSP_B;
371 break;
372 default:
373 dev_err(component->dev, "unsupported dai format\n");
374 return -EINVAL;
375 }
376
377 switch (format & SND_SOC_DAIFMT_MASTER_MASK) {
378 case SND_SOC_DAIFMT_CBS_CFS:
379 master_mode = false;
380 break;
381 case SND_SOC_DAIFMT_CBM_CFM:
382 master_mode = true;
383 break;
384 default:
385 dev_err(component->dev, "unsupported master/slave mode\n");
386 return -EINVAL;
387 }
388
389 switch (format & SND_SOC_DAIFMT_INV_MASK) {
390 case SND_SOC_DAIFMT_NB_NF:
391 break;
392 default:
393 return -EINVAL;
394 }
395
396 if (dai->id == PCM3168A_DAI_DAC) {
397 reg = PCM3168A_DAC_PWR_MST_FMT;
398 mask = PCM3168A_DAC_FMT_MASK;
399 shift = PCM3168A_DAC_FMT_SHIFT;
400 } else {
401 reg = PCM3168A_ADC_MST_FMT;
402 mask = PCM3168A_ADC_FMTAD_MASK;
403 shift = PCM3168A_ADC_FMTAD_SHIFT;
404 }
405
406 pcm3168a->io_params[dai->id].master_mode = master_mode;
407 pcm3168a->io_params[dai->id].fmt = fmt;
408
409 regmap_update_bits(pcm3168a->regmap, reg, mask, fmt << shift);
410
411 pcm3168a_update_fixup_pcm_stream(dai);
412
413 return 0;
414 }
415
416 static int pcm3168a_set_tdm_slot(struct snd_soc_dai *dai, unsigned int tx_mask,
417 unsigned int rx_mask, int slots,
418 int slot_width)
419 {
420 struct snd_soc_component *component = dai->component;
421 struct pcm3168a_priv *pcm3168a = snd_soc_component_get_drvdata(component);
422 struct pcm3168a_io_params *io_params = &pcm3168a->io_params[dai->id];
423
424 if (tx_mask >= (1<<slots) || rx_mask >= (1<<slots)) {
425 dev_err(component->dev,
426 "Bad tdm mask tx: 0x%08x rx: 0x%08x slots %d\n",
427 tx_mask, rx_mask, slots);
428 return -EINVAL;
429 }
430
431 if (slot_width &&
432 (slot_width != 16 && slot_width != 24 && slot_width != 32 )) {
433 dev_err(component->dev, "Unsupported slot_width %d\n",
434 slot_width);
435 return -EINVAL;
436 }
437
438 io_params->tdm_slots = slots;
439 io_params->slot_width = slot_width;
440 /* Ignore the not relevant mask for the DAI/direction */
441 if (dai->id == PCM3168A_DAI_DAC)
442 io_params->tdm_mask = tx_mask;
443 else
444 io_params->tdm_mask = rx_mask;
445
446 pcm3168a_update_fixup_pcm_stream(dai);
447
448 return 0;
449 }
450
451 static int pcm3168a_hw_params(struct snd_pcm_substream *substream,
452 struct snd_pcm_hw_params *params,
453 struct snd_soc_dai *dai)
454 {
455 struct snd_soc_component *component = dai->component;
456 struct pcm3168a_priv *pcm3168a = snd_soc_component_get_drvdata(component);
457 struct pcm3168a_io_params *io_params = &pcm3168a->io_params[dai->id];
458 bool master_mode;
459 u32 val, mask, shift, reg;
460 unsigned int rate, fmt, ratio, max_ratio;
461 unsigned int tdm_slots;
462 int i, slot_width;
463
464 rate = params_rate(params);
465
466 ratio = pcm3168a->sysclk / rate;
467
468 if (dai->id == PCM3168A_DAI_DAC) {
469 max_ratio = PCM3168A_NUM_SCKI_RATIOS_DAC;
470 reg = PCM3168A_DAC_PWR_MST_FMT;
471 mask = PCM3168A_DAC_MSDA_MASK;
472 shift = PCM3168A_DAC_MSDA_SHIFT;
473 } else {
474 max_ratio = PCM3168A_NUM_SCKI_RATIOS_ADC;
475 reg = PCM3168A_ADC_MST_FMT;
476 mask = PCM3168A_ADC_MSAD_MASK;
477 shift = PCM3168A_ADC_MSAD_SHIFT;
478 }
479
480 master_mode = io_params->master_mode;
481 fmt = io_params->fmt;
482
483 for (i = 0; i < max_ratio; i++) {
484 if (pcm3168a_scki_ratios[i] == ratio)
485 break;
486 }
487
488 if (i == max_ratio) {
489 dev_err(component->dev, "unsupported sysclk ratio\n");
490 return -EINVAL;
491 }
492
493 if (io_params->slot_width)
494 slot_width = io_params->slot_width;
495 else
496 slot_width = params_width(params);
497
498 switch (slot_width) {
499 case 16:
500 if (master_mode || (fmt != PCM3168A_FMT_RIGHT_J)) {
501 dev_err(component->dev, "16-bit slots are supported only for slave mode using right justified\n");
502 return -EINVAL;
503 }
504 fmt = PCM3168A_FMT_RIGHT_J_16;
505 break;
506 case 24:
507 if (master_mode || (fmt & PCM3168A_FMT_DSP_MASK)) {
508 dev_err(component->dev, "24-bit slots not supported in master mode, or slave mode using DSP\n");
509 return -EINVAL;
510 }
511 break;
512 case 32:
513 break;
514 default:
515 dev_err(component->dev, "unsupported frame size: %d\n", slot_width);
516 return -EINVAL;
517 }
518
519 if (io_params->tdm_slots)
520 tdm_slots = io_params->tdm_slots;
521 else
522 tdm_slots = params_channels(params);
523
524 /*
525 * Switch the codec to TDM mode when more than 2 TDM slots are needed
526 * for the stream.
527 * If pcm3168a->tdm_slots is not set or set to more than 2 (8/6 usually)
528 * then DIN1/DOUT1 is used in TDM mode.
529 * If pcm3168a->tdm_slots is set to 2 then DIN1/2/3/4 and DOUT1/2/3 is
530 * used in normal mode, no need to switch to TDM modes.
531 */
532 if (tdm_slots > 2) {
533 switch (fmt) {
534 case PCM3168A_FMT_I2S:
535 case PCM3168A_FMT_DSP_A:
536 fmt = PCM3168A_FMT_I2S_TDM;
537 break;
538 case PCM3168A_FMT_LEFT_J:
539 case PCM3168A_FMT_DSP_B:
540 fmt = PCM3168A_FMT_LEFT_J_TDM;
541 break;
542 default:
543 dev_err(component->dev,
544 "TDM is supported under DSP/I2S/Left_J only\n");
545 return -EINVAL;
546 }
547 }
548
549 if (master_mode)
550 val = ((i + 1) << shift);
551 else
552 val = 0;
553
554 regmap_update_bits(pcm3168a->regmap, reg, mask, val);
555
556 if (dai->id == PCM3168A_DAI_DAC) {
557 mask = PCM3168A_DAC_FMT_MASK;
558 shift = PCM3168A_DAC_FMT_SHIFT;
559 } else {
560 mask = PCM3168A_ADC_FMTAD_MASK;
561 shift = PCM3168A_ADC_FMTAD_SHIFT;
562 }
563
564 regmap_update_bits(pcm3168a->regmap, reg, mask, fmt << shift);
565
566 return 0;
567 }
568
569 static const struct snd_soc_dai_ops pcm3168a_dai_ops = {
570 .set_fmt = pcm3168a_set_dai_fmt,
571 .set_sysclk = pcm3168a_set_dai_sysclk,
572 .hw_params = pcm3168a_hw_params,
573 .digital_mute = pcm3168a_digital_mute,
574 .set_tdm_slot = pcm3168a_set_tdm_slot,
575 };
576
577 static struct snd_soc_dai_driver pcm3168a_dais[] = {
578 {
579 .name = "pcm3168a-dac",
580 .id = PCM3168A_DAI_DAC,
581 .playback = {
582 .stream_name = "Playback",
583 .channels_min = 1,
584 .channels_max = 8,
585 .rates = SNDRV_PCM_RATE_8000_192000,
586 .formats = PCM3168A_FORMATS
587 },
588 .ops = &pcm3168a_dai_ops
589 },
590 {
591 .name = "pcm3168a-adc",
592 .id = PCM3168A_DAI_ADC,
593 .capture = {
594 .stream_name = "Capture",
595 .channels_min = 1,
596 .channels_max = 6,
597 .rates = SNDRV_PCM_RATE_8000_96000,
598 .formats = PCM3168A_FORMATS
599 },
600 .ops = &pcm3168a_dai_ops
601 },
602 };
603
604 static const struct reg_default pcm3168a_reg_default[] = {
605 { PCM3168A_RST_SMODE, PCM3168A_MRST_MASK | PCM3168A_SRST_MASK },
606 { PCM3168A_DAC_PWR_MST_FMT, 0x00 },
607 { PCM3168A_DAC_OP_FLT, 0x00 },
608 { PCM3168A_DAC_INV, 0x00 },
609 { PCM3168A_DAC_MUTE, 0x00 },
610 { PCM3168A_DAC_ZERO, 0x00 },
611 { PCM3168A_DAC_ATT_DEMP_ZF, 0x00 },
612 { PCM3168A_DAC_VOL_MASTER, 0xff },
613 { PCM3168A_DAC_VOL_CHAN_START, 0xff },
614 { PCM3168A_DAC_VOL_CHAN_START + 1, 0xff },
615 { PCM3168A_DAC_VOL_CHAN_START + 2, 0xff },
616 { PCM3168A_DAC_VOL_CHAN_START + 3, 0xff },
617 { PCM3168A_DAC_VOL_CHAN_START + 4, 0xff },
618 { PCM3168A_DAC_VOL_CHAN_START + 5, 0xff },
619 { PCM3168A_DAC_VOL_CHAN_START + 6, 0xff },
620 { PCM3168A_DAC_VOL_CHAN_START + 7, 0xff },
621 { PCM3168A_ADC_SMODE, 0x00 },
622 { PCM3168A_ADC_MST_FMT, 0x00 },
623 { PCM3168A_ADC_PWR_HPFB, 0x00 },
624 { PCM3168A_ADC_SEAD, 0x00 },
625 { PCM3168A_ADC_INV, 0x00 },
626 { PCM3168A_ADC_MUTE, 0x00 },
627 { PCM3168A_ADC_OV, 0x00 },
628 { PCM3168A_ADC_ATT_OVF, 0x00 },
629 { PCM3168A_ADC_VOL_MASTER, 0xd3 },
630 { PCM3168A_ADC_VOL_CHAN_START, 0xd3 },
631 { PCM3168A_ADC_VOL_CHAN_START + 1, 0xd3 },
632 { PCM3168A_ADC_VOL_CHAN_START + 2, 0xd3 },
633 { PCM3168A_ADC_VOL_CHAN_START + 3, 0xd3 },
634 { PCM3168A_ADC_VOL_CHAN_START + 4, 0xd3 },
635 { PCM3168A_ADC_VOL_CHAN_START + 5, 0xd3 }
636 };
637
638 static bool pcm3168a_readable_register(struct device *dev, unsigned int reg)
639 {
640 if (reg >= PCM3168A_RST_SMODE)
641 return true;
642 else
643 return false;
644 }
645
646 static bool pcm3168a_volatile_register(struct device *dev, unsigned int reg)
647 {
648 switch (reg) {
649 case PCM3168A_RST_SMODE:
650 case PCM3168A_DAC_ZERO:
651 case PCM3168A_ADC_OV:
652 return true;
653 default:
654 return false;
655 }
656 }
657
658 static bool pcm3168a_writeable_register(struct device *dev, unsigned int reg)
659 {
660 if (reg < PCM3168A_RST_SMODE)
661 return false;
662
663 switch (reg) {
664 case PCM3168A_DAC_ZERO:
665 case PCM3168A_ADC_OV:
666 return false;
667 default:
668 return true;
669 }
670 }
671
672 const struct regmap_config pcm3168a_regmap = {
673 .reg_bits = 8,
674 .val_bits = 8,
675
676 .max_register = PCM3168A_ADC_VOL_CHAN_START + 5,
677 .reg_defaults = pcm3168a_reg_default,
678 .num_reg_defaults = ARRAY_SIZE(pcm3168a_reg_default),
679 .readable_reg = pcm3168a_readable_register,
680 .volatile_reg = pcm3168a_volatile_register,
681 .writeable_reg = pcm3168a_writeable_register,
682 .cache_type = REGCACHE_FLAT
683 };
684 EXPORT_SYMBOL_GPL(pcm3168a_regmap);
685
686 static const struct snd_soc_component_driver pcm3168a_driver = {
687 .controls = pcm3168a_snd_controls,
688 .num_controls = ARRAY_SIZE(pcm3168a_snd_controls),
689 .dapm_widgets = pcm3168a_dapm_widgets,
690 .num_dapm_widgets = ARRAY_SIZE(pcm3168a_dapm_widgets),
691 .dapm_routes = pcm3168a_dapm_routes,
692 .num_dapm_routes = ARRAY_SIZE(pcm3168a_dapm_routes),
693 .use_pmdown_time = 1,
694 .endianness = 1,
695 .non_legacy_dai_naming = 1,
696 };
697
698 int pcm3168a_probe(struct device *dev, struct regmap *regmap)
699 {
700 struct pcm3168a_priv *pcm3168a;
701 int ret, i;
702
703 pcm3168a = devm_kzalloc(dev, sizeof(*pcm3168a), GFP_KERNEL);
704 if (pcm3168a == NULL)
705 return -ENOMEM;
706
707 dev_set_drvdata(dev, pcm3168a);
708
709 /*
710 * Request the reset (connected to RST pin) gpio line as non exclusive
711 * as the same reset line might be connected to multiple pcm3168a codec
712 *
713 * The RST is low active, we want the GPIO line to be high initially, so
714 * request the initial level to LOW which in practice means DEASSERTED:
715 * The deasserted level of GPIO_ACTIVE_LOW is HIGH.
716 */
717 pcm3168a->gpio_rst = devm_gpiod_get_optional(dev, "reset",
718 GPIOD_OUT_LOW |
719 GPIOD_FLAGS_BIT_NONEXCLUSIVE);
720 if (IS_ERR(pcm3168a->gpio_rst)) {
721 ret = PTR_ERR(pcm3168a->gpio_rst);
722 if (ret != -EPROBE_DEFER )
723 dev_err(dev, "failed to acquire RST gpio: %d\n", ret);
724
725 return ret;
726 }
727
728 pcm3168a->scki = devm_clk_get(dev, "scki");
729 if (IS_ERR(pcm3168a->scki)) {
730 ret = PTR_ERR(pcm3168a->scki);
731 if (ret != -EPROBE_DEFER)
732 dev_err(dev, "failed to acquire clock 'scki': %d\n", ret);
733 return ret;
734 }
735
736 ret = clk_prepare_enable(pcm3168a->scki);
737 if (ret) {
738 dev_err(dev, "Failed to enable mclk: %d\n", ret);
739 return ret;
740 }
741
742 pcm3168a->sysclk = clk_get_rate(pcm3168a->scki);
743
744 for (i = 0; i < ARRAY_SIZE(pcm3168a->supplies); i++)
745 pcm3168a->supplies[i].supply = pcm3168a_supply_names[i];
746
747 ret = devm_regulator_bulk_get(dev,
748 ARRAY_SIZE(pcm3168a->supplies), pcm3168a->supplies);
749 if (ret) {
750 if (ret != -EPROBE_DEFER)
751 dev_err(dev, "failed to request supplies: %d\n", ret);
752 goto err_clk;
753 }
754
755 ret = regulator_bulk_enable(ARRAY_SIZE(pcm3168a->supplies),
756 pcm3168a->supplies);
757 if (ret) {
758 dev_err(dev, "failed to enable supplies: %d\n", ret);
759 goto err_clk;
760 }
761
762 pcm3168a->regmap = regmap;
763 if (IS_ERR(pcm3168a->regmap)) {
764 ret = PTR_ERR(pcm3168a->regmap);
765 dev_err(dev, "failed to allocate regmap: %d\n", ret);
766 goto err_regulator;
767 }
768
769 if (pcm3168a->gpio_rst) {
770 /*
771 * The device is taken out from reset via GPIO line, wait for
772 * 3846 SCKI clock cycles for the internal reset de-assertion
773 */
774 msleep(DIV_ROUND_UP(3846 * 1000, pcm3168a->sysclk));
775 } else {
776 ret = pcm3168a_reset(pcm3168a);
777 if (ret) {
778 dev_err(dev, "Failed to reset device: %d\n", ret);
779 goto err_regulator;
780 }
781 }
782
783 pm_runtime_set_active(dev);
784 pm_runtime_enable(dev);
785 pm_runtime_idle(dev);
786
787 memcpy(pcm3168a->dai_drv, pcm3168a_dais, sizeof(pcm3168a->dai_drv));
788 ret = devm_snd_soc_register_component(dev, &pcm3168a_driver,
789 pcm3168a->dai_drv,
790 ARRAY_SIZE(pcm3168a->dai_drv));
791 if (ret) {
792 dev_err(dev, "failed to register component: %d\n", ret);
793 goto err_regulator;
794 }
795
796 return 0;
797
798 err_regulator:
799 regulator_bulk_disable(ARRAY_SIZE(pcm3168a->supplies),
800 pcm3168a->supplies);
801 err_clk:
802 clk_disable_unprepare(pcm3168a->scki);
803
804 return ret;
805 }
806 EXPORT_SYMBOL_GPL(pcm3168a_probe);
807
808 static void pcm3168a_disable(struct device *dev)
809 {
810 struct pcm3168a_priv *pcm3168a = dev_get_drvdata(dev);
811
812 regulator_bulk_disable(ARRAY_SIZE(pcm3168a->supplies),
813 pcm3168a->supplies);
814 clk_disable_unprepare(pcm3168a->scki);
815 }
816
817 void pcm3168a_remove(struct device *dev)
818 {
819 struct pcm3168a_priv *pcm3168a = dev_get_drvdata(dev);
820
821 /*
822 * The RST is low active, we want the GPIO line to be low when the
823 * driver is removed, so set level to 1 which in practice means
824 * ASSERTED:
825 * The asserted level of GPIO_ACTIVE_LOW is LOW.
826 */
827 gpiod_set_value_cansleep(pcm3168a->gpio_rst, 1);
828 pm_runtime_disable(dev);
829 #ifndef CONFIG_PM
830 pcm3168a_disable(dev);
831 #endif
832 }
833 EXPORT_SYMBOL_GPL(pcm3168a_remove);
834
835 #ifdef CONFIG_PM
836 static int pcm3168a_rt_resume(struct device *dev)
837 {
838 struct pcm3168a_priv *pcm3168a = dev_get_drvdata(dev);
839 int ret;
840
841 ret = clk_prepare_enable(pcm3168a->scki);
842 if (ret) {
843 dev_err(dev, "Failed to enable mclk: %d\n", ret);
844 return ret;
845 }
846
847 ret = regulator_bulk_enable(ARRAY_SIZE(pcm3168a->supplies),
848 pcm3168a->supplies);
849 if (ret) {
850 dev_err(dev, "Failed to enable supplies: %d\n", ret);
851 goto err_clk;
852 }
853
854 ret = pcm3168a_reset(pcm3168a);
855 if (ret) {
856 dev_err(dev, "Failed to reset device: %d\n", ret);
857 goto err_regulator;
858 }
859
860 regcache_cache_only(pcm3168a->regmap, false);
861
862 regcache_mark_dirty(pcm3168a->regmap);
863
864 ret = regcache_sync(pcm3168a->regmap);
865 if (ret) {
866 dev_err(dev, "Failed to sync regmap: %d\n", ret);
867 goto err_regulator;
868 }
869
870 return 0;
871
872 err_regulator:
873 regulator_bulk_disable(ARRAY_SIZE(pcm3168a->supplies),
874 pcm3168a->supplies);
875 err_clk:
876 clk_disable_unprepare(pcm3168a->scki);
877
878 return ret;
879 }
880
881 static int pcm3168a_rt_suspend(struct device *dev)
882 {
883 struct pcm3168a_priv *pcm3168a = dev_get_drvdata(dev);
884
885 regcache_cache_only(pcm3168a->regmap, true);
886
887 pcm3168a_disable(dev);
888
889 return 0;
890 }
891 #endif
892
893 const struct dev_pm_ops pcm3168a_pm_ops = {
894 SET_RUNTIME_PM_OPS(pcm3168a_rt_suspend, pcm3168a_rt_resume, NULL)
895 };
896 EXPORT_SYMBOL_GPL(pcm3168a_pm_ops);
897
898 MODULE_DESCRIPTION("PCM3168A codec driver");
899 MODULE_AUTHOR("Damien Horsley <Damien.Horsley@imgtec.com>");
900 MODULE_LICENSE("GPL v2");
Linux with added FPC-III support