1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * cs4265.c -- CS4265 ALSA SoC audio driver
4 *
5 * Copyright 2014 Cirrus Logic, Inc.
6 *
7 * Author: Paul Handrigan <paul.handrigan@cirrus.com>
8 */
9
10 #include <linux/module.h>
11 #include <linux/moduleparam.h>
12 #include <linux/kernel.h>
13 #include <linux/gpio/consumer.h>
14 #include <linux/init.h>
15 #include <linux/delay.h>
16 #include <linux/i2c.h>
17 #include <linux/input.h>
18 #include <linux/regmap.h>
19 #include <linux/slab.h>
20 #include <linux/platform_device.h>
21 #include <sound/core.h>
22 #include <sound/pcm.h>
23 #include <sound/pcm_params.h>
24 #include <sound/soc.h>
25 #include <sound/soc-dapm.h>
26 #include <sound/initval.h>
27 #include <sound/tlv.h>
28 #include "cs4265.h"
29
30 struct cs4265_private {
31 struct regmap *regmap;
32 struct gpio_desc *reset_gpio;
33 u8 format;
34 u32 sysclk;
35 };
36
37 static const struct reg_default cs4265_reg_defaults[] = {
38 { CS4265_PWRCTL, 0x0F },
39 { CS4265_DAC_CTL, 0x08 },
40 { CS4265_ADC_CTL, 0x00 },
41 { CS4265_MCLK_FREQ, 0x00 },
42 { CS4265_SIG_SEL, 0x40 },
43 { CS4265_CHB_PGA_CTL, 0x00 },
44 { CS4265_CHA_PGA_CTL, 0x00 },
45 { CS4265_ADC_CTL2, 0x19 },
46 { CS4265_DAC_CHA_VOL, 0x00 },
47 { CS4265_DAC_CHB_VOL, 0x00 },
48 { CS4265_DAC_CTL2, 0xC0 },
49 { CS4265_SPDIF_CTL1, 0x00 },
50 { CS4265_SPDIF_CTL2, 0x00 },
51 { CS4265_INT_MASK, 0x00 },
52 { CS4265_STATUS_MODE_MSB, 0x00 },
53 { CS4265_STATUS_MODE_LSB, 0x00 },
54 };
55
cs4265_readable_register(struct device * dev,unsigned int reg)56 static bool cs4265_readable_register(struct device *dev, unsigned int reg)
57 {
58 switch (reg) {
59 case CS4265_CHIP_ID ... CS4265_MAX_REGISTER:
60 return true;
61 default:
62 return false;
63 }
64 }
65
cs4265_volatile_register(struct device * dev,unsigned int reg)66 static bool cs4265_volatile_register(struct device *dev, unsigned int reg)
67 {
68 switch (reg) {
69 case CS4265_INT_STATUS:
70 return true;
71 default:
72 return false;
73 }
74 }
75
76 static DECLARE_TLV_DB_SCALE(pga_tlv, -1200, 50, 0);
77
78 static DECLARE_TLV_DB_SCALE(dac_tlv, -12750, 50, 0);
79
80 static const char * const digital_input_mux_text[] = {
81 "SDIN1", "SDIN2"
82 };
83
84 static SOC_ENUM_SINGLE_DECL(digital_input_mux_enum, CS4265_SIG_SEL, 7,
85 digital_input_mux_text);
86
87 static const struct snd_kcontrol_new digital_input_mux =
88 SOC_DAPM_ENUM("Digital Input Mux", digital_input_mux_enum);
89
90 static const char * const mic_linein_text[] = {
91 "MIC", "LINEIN"
92 };
93
94 static SOC_ENUM_SINGLE_DECL(mic_linein_enum, CS4265_ADC_CTL2, 0,
95 mic_linein_text);
96
97 static const char * const cam_mode_text[] = {
98 "One Byte", "Two Byte"
99 };
100
101 static SOC_ENUM_SINGLE_DECL(cam_mode_enum, CS4265_SPDIF_CTL1, 5,
102 cam_mode_text);
103
104 static const char * const cam_mono_stereo_text[] = {
105 "Stereo", "Mono"
106 };
107
108 static SOC_ENUM_SINGLE_DECL(spdif_mono_stereo_enum, CS4265_SPDIF_CTL2, 2,
109 cam_mono_stereo_text);
110
111 static const char * const mono_select_text[] = {
112 "Channel A", "Channel B"
113 };
114
115 static SOC_ENUM_SINGLE_DECL(spdif_mono_select_enum, CS4265_SPDIF_CTL2, 0,
116 mono_select_text);
117
118 static const struct snd_kcontrol_new mic_linein_mux =
119 SOC_DAPM_ENUM("ADC Input Capture Mux", mic_linein_enum);
120
121 static const struct snd_kcontrol_new loopback_ctl =
122 SOC_DAPM_SINGLE("Switch", CS4265_SIG_SEL, 1, 1, 0);
123
124 static const struct snd_kcontrol_new spdif_switch =
125 SOC_DAPM_SINGLE("Switch", SND_SOC_NOPM, 0, 0, 0);
126
127 static const struct snd_kcontrol_new dac_switch =
128 SOC_DAPM_SINGLE("Switch", CS4265_PWRCTL, 1, 1, 0);
129
130 static const struct snd_kcontrol_new cs4265_snd_controls[] = {
131
132 SOC_DOUBLE_R_SX_TLV("PGA Volume", CS4265_CHA_PGA_CTL,
133 CS4265_CHB_PGA_CTL, 0, 0x28, 0x30, pga_tlv),
134 SOC_DOUBLE_R_TLV("DAC Volume", CS4265_DAC_CHA_VOL,
135 CS4265_DAC_CHB_VOL, 0, 0xFF, 1, dac_tlv),
136 SOC_SINGLE("De-emp 44.1kHz Switch", CS4265_DAC_CTL, 1,
137 1, 0),
138 SOC_SINGLE("DAC INV Switch", CS4265_DAC_CTL2, 5,
139 1, 0),
140 SOC_SINGLE("DAC Zero Cross Switch", CS4265_DAC_CTL2, 6,
141 1, 0),
142 SOC_SINGLE("DAC Soft Ramp Switch", CS4265_DAC_CTL2, 7,
143 1, 0),
144 SOC_SINGLE("ADC HPF Switch", CS4265_ADC_CTL, 1,
145 1, 0),
146 SOC_SINGLE("ADC Zero Cross Switch", CS4265_ADC_CTL2, 3,
147 1, 1),
148 SOC_SINGLE("ADC Soft Ramp Switch", CS4265_ADC_CTL2, 7,
149 1, 0),
150 SOC_SINGLE("E to F Buffer Disable Switch", CS4265_SPDIF_CTL1,
151 6, 1, 0),
152 SOC_ENUM("C Data Access", cam_mode_enum),
153 SOC_SINGLE("Validity Bit Control Switch", CS4265_SPDIF_CTL2,
154 3, 1, 0),
155 SOC_ENUM("SPDIF Mono/Stereo", spdif_mono_stereo_enum),
156 SOC_SINGLE("MMTLR Data Switch", CS4265_SPDIF_CTL2, 0, 1, 0),
157 SOC_ENUM("Mono Channel Select", spdif_mono_select_enum),
158 SND_SOC_BYTES("C Data Buffer", CS4265_C_DATA_BUFF, 24),
159 };
160
161 static const struct snd_soc_dapm_widget cs4265_dapm_widgets[] = {
162
163 SND_SOC_DAPM_INPUT("LINEINL"),
164 SND_SOC_DAPM_INPUT("LINEINR"),
165 SND_SOC_DAPM_INPUT("MICL"),
166 SND_SOC_DAPM_INPUT("MICR"),
167
168 SND_SOC_DAPM_AIF_OUT("DOUT", NULL, 0,
169 SND_SOC_NOPM, 0, 0),
170 SND_SOC_DAPM_AIF_OUT("SPDIFOUT", NULL, 0,
171 SND_SOC_NOPM, 0, 0),
172
173 SND_SOC_DAPM_MUX("ADC Mux", SND_SOC_NOPM, 0, 0, &mic_linein_mux),
174
175 SND_SOC_DAPM_ADC("ADC", NULL, CS4265_PWRCTL, 2, 1),
176 SND_SOC_DAPM_PGA("Pre-amp MIC", CS4265_PWRCTL, 3,
177 1, NULL, 0),
178
179 SND_SOC_DAPM_MUX("Input Mux", SND_SOC_NOPM,
180 0, 0, &digital_input_mux),
181
182 SND_SOC_DAPM_MIXER("SDIN1 Input Mixer", SND_SOC_NOPM, 0, 0, NULL, 0),
183 SND_SOC_DAPM_MIXER("SDIN2 Input Mixer", SND_SOC_NOPM, 0, 0, NULL, 0),
184 SND_SOC_DAPM_MIXER("SPDIF Transmitter", SND_SOC_NOPM, 0, 0, NULL, 0),
185
186 SND_SOC_DAPM_SWITCH("Loopback", SND_SOC_NOPM, 0, 0,
187 &loopback_ctl),
188 SND_SOC_DAPM_SWITCH("SPDIF", CS4265_SPDIF_CTL2, 5, 1,
189 &spdif_switch),
190 SND_SOC_DAPM_SWITCH("DAC", CS4265_PWRCTL, 1, 1,
191 &dac_switch),
192
193 SND_SOC_DAPM_AIF_IN("DIN1", NULL, 0,
194 SND_SOC_NOPM, 0, 0),
195 SND_SOC_DAPM_AIF_IN("DIN2", NULL, 0,
196 SND_SOC_NOPM, 0, 0),
197 SND_SOC_DAPM_AIF_IN("TXIN", NULL, 0,
198 CS4265_SPDIF_CTL2, 5, 1),
199
200 SND_SOC_DAPM_OUTPUT("LINEOUTL"),
201 SND_SOC_DAPM_OUTPUT("LINEOUTR"),
202
203 };
204
205 static const struct snd_soc_dapm_route cs4265_audio_map[] = {
206
207 {"DIN1", NULL, "DAI1 Playback"},
208 {"DIN2", NULL, "DAI2 Playback"},
209 {"SDIN1 Input Mixer", NULL, "DIN1"},
210 {"SDIN2 Input Mixer", NULL, "DIN2"},
211 {"Input Mux", "SDIN1", "SDIN1 Input Mixer"},
212 {"Input Mux", "SDIN2", "SDIN2 Input Mixer"},
213 {"DAC", "Switch", "Input Mux"},
214 {"SPDIF", "Switch", "Input Mux"},
215 {"LINEOUTL", NULL, "DAC"},
216 {"LINEOUTR", NULL, "DAC"},
217 {"SPDIFOUT", NULL, "SPDIF"},
218
219 {"Pre-amp MIC", NULL, "MICL"},
220 {"Pre-amp MIC", NULL, "MICR"},
221 {"ADC Mux", "MIC", "Pre-amp MIC"},
222 {"ADC Mux", "LINEIN", "LINEINL"},
223 {"ADC Mux", "LINEIN", "LINEINR"},
224 {"ADC", NULL, "ADC Mux"},
225 {"DOUT", NULL, "ADC"},
226 {"DAI1 Capture", NULL, "DOUT"},
227 {"DAI2 Capture", NULL, "DOUT"},
228
229 /* Loopback */
230 {"Loopback", "Switch", "ADC"},
231 {"DAC", NULL, "Loopback"},
232 };
233
234 struct cs4265_clk_para {
235 u32 mclk;
236 u32 rate;
237 u8 fm_mode; /* values 1, 2, or 4 */
238 u8 mclkdiv;
239 };
240
241 static const struct cs4265_clk_para clk_map_table[] = {
242 /*32k*/
243 {8192000, 32000, 0, 0},
244 {12288000, 32000, 0, 1},
245 {16384000, 32000, 0, 2},
246 {24576000, 32000, 0, 3},
247 {32768000, 32000, 0, 4},
248
249 /*44.1k*/
250 {11289600, 44100, 0, 0},
251 {16934400, 44100, 0, 1},
252 {22579200, 44100, 0, 2},
253 {33868000, 44100, 0, 3},
254 {45158400, 44100, 0, 4},
255
256 /*48k*/
257 {12288000, 48000, 0, 0},
258 {18432000, 48000, 0, 1},
259 {24576000, 48000, 0, 2},
260 {36864000, 48000, 0, 3},
261 {49152000, 48000, 0, 4},
262
263 /*64k*/
264 {8192000, 64000, 1, 0},
265 {12288000, 64000, 1, 1},
266 {16934400, 64000, 1, 2},
267 {24576000, 64000, 1, 3},
268 {32768000, 64000, 1, 4},
269
270 /* 88.2k */
271 {11289600, 88200, 1, 0},
272 {16934400, 88200, 1, 1},
273 {22579200, 88200, 1, 2},
274 {33868000, 88200, 1, 3},
275 {45158400, 88200, 1, 4},
276
277 /* 96k */
278 {12288000, 96000, 1, 0},
279 {18432000, 96000, 1, 1},
280 {24576000, 96000, 1, 2},
281 {36864000, 96000, 1, 3},
282 {49152000, 96000, 1, 4},
283
284 /* 128k */
285 {8192000, 128000, 2, 0},
286 {12288000, 128000, 2, 1},
287 {16934400, 128000, 2, 2},
288 {24576000, 128000, 2, 3},
289 {32768000, 128000, 2, 4},
290
291 /* 176.4k */
292 {11289600, 176400, 2, 0},
293 {16934400, 176400, 2, 1},
294 {22579200, 176400, 2, 2},
295 {33868000, 176400, 2, 3},
296 {49152000, 176400, 2, 4},
297
298 /* 192k */
299 {12288000, 192000, 2, 0},
300 {18432000, 192000, 2, 1},
301 {24576000, 192000, 2, 2},
302 {36864000, 192000, 2, 3},
303 {49152000, 192000, 2, 4},
304 };
305
cs4265_get_clk_index(int mclk,int rate)306 static int cs4265_get_clk_index(int mclk, int rate)
307 {
308 int i;
309
310 for (i = 0; i < ARRAY_SIZE(clk_map_table); i++) {
311 if (clk_map_table[i].rate == rate &&
312 clk_map_table[i].mclk == mclk)
313 return i;
314 }
315 return -EINVAL;
316 }
317
cs4265_set_sysclk(struct snd_soc_dai * codec_dai,int clk_id,unsigned int freq,int dir)318 static int cs4265_set_sysclk(struct snd_soc_dai *codec_dai, int clk_id,
319 unsigned int freq, int dir)
320 {
321 struct snd_soc_component *component = codec_dai->component;
322 struct cs4265_private *cs4265 = snd_soc_component_get_drvdata(component);
323 int i;
324
325 if (clk_id != 0) {
326 dev_err(component->dev, "Invalid clk_id %d\n", clk_id);
327 return -EINVAL;
328 }
329 for (i = 0; i < ARRAY_SIZE(clk_map_table); i++) {
330 if (clk_map_table[i].mclk == freq) {
331 cs4265->sysclk = freq;
332 return 0;
333 }
334 }
335 cs4265->sysclk = 0;
336 dev_err(component->dev, "Invalid freq parameter %d\n", freq);
337 return -EINVAL;
338 }
339
cs4265_set_fmt(struct snd_soc_dai * codec_dai,unsigned int fmt)340 static int cs4265_set_fmt(struct snd_soc_dai *codec_dai, unsigned int fmt)
341 {
342 struct snd_soc_component *component = codec_dai->component;
343 struct cs4265_private *cs4265 = snd_soc_component_get_drvdata(component);
344 u8 iface = 0;
345
346 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
347 case SND_SOC_DAIFMT_CBM_CFM:
348 snd_soc_component_update_bits(component, CS4265_ADC_CTL,
349 CS4265_ADC_MASTER,
350 CS4265_ADC_MASTER);
351 break;
352 case SND_SOC_DAIFMT_CBS_CFS:
353 snd_soc_component_update_bits(component, CS4265_ADC_CTL,
354 CS4265_ADC_MASTER,
355 0);
356 break;
357 default:
358 return -EINVAL;
359 }
360
361 /* interface format */
362 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
363 case SND_SOC_DAIFMT_I2S:
364 iface |= SND_SOC_DAIFMT_I2S;
365 break;
366 case SND_SOC_DAIFMT_RIGHT_J:
367 iface |= SND_SOC_DAIFMT_RIGHT_J;
368 break;
369 case SND_SOC_DAIFMT_LEFT_J:
370 iface |= SND_SOC_DAIFMT_LEFT_J;
371 break;
372 default:
373 return -EINVAL;
374 }
375
376 cs4265->format = iface;
377 return 0;
378 }
379
cs4265_mute(struct snd_soc_dai * dai,int mute,int direction)380 static int cs4265_mute(struct snd_soc_dai *dai, int mute, int direction)
381 {
382 struct snd_soc_component *component = dai->component;
383
384 if (mute) {
385 snd_soc_component_update_bits(component, CS4265_DAC_CTL,
386 CS4265_DAC_CTL_MUTE,
387 CS4265_DAC_CTL_MUTE);
388 snd_soc_component_update_bits(component, CS4265_SPDIF_CTL2,
389 CS4265_SPDIF_CTL2_MUTE,
390 CS4265_SPDIF_CTL2_MUTE);
391 } else {
392 snd_soc_component_update_bits(component, CS4265_DAC_CTL,
393 CS4265_DAC_CTL_MUTE,
394 0);
395 snd_soc_component_update_bits(component, CS4265_SPDIF_CTL2,
396 CS4265_SPDIF_CTL2_MUTE,
397 0);
398 }
399 return 0;
400 }
401
cs4265_pcm_hw_params(struct snd_pcm_substream * substream,struct snd_pcm_hw_params * params,struct snd_soc_dai * dai)402 static int cs4265_pcm_hw_params(struct snd_pcm_substream *substream,
403 struct snd_pcm_hw_params *params,
404 struct snd_soc_dai *dai)
405 {
406 struct snd_soc_component *component = dai->component;
407 struct cs4265_private *cs4265 = snd_soc_component_get_drvdata(component);
408 int index;
409
410 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE &&
411 ((cs4265->format & SND_SOC_DAIFMT_FORMAT_MASK)
412 == SND_SOC_DAIFMT_RIGHT_J))
413 return -EINVAL;
414
415 index = cs4265_get_clk_index(cs4265->sysclk, params_rate(params));
416 if (index >= 0) {
417 snd_soc_component_update_bits(component, CS4265_ADC_CTL,
418 CS4265_ADC_FM, clk_map_table[index].fm_mode << 6);
419 snd_soc_component_update_bits(component, CS4265_MCLK_FREQ,
420 CS4265_MCLK_FREQ_MASK,
421 clk_map_table[index].mclkdiv << 4);
422
423 } else {
424 dev_err(component->dev, "can't get correct mclk\n");
425 return -EINVAL;
426 }
427
428 switch (cs4265->format & SND_SOC_DAIFMT_FORMAT_MASK) {
429 case SND_SOC_DAIFMT_I2S:
430 snd_soc_component_update_bits(component, CS4265_DAC_CTL,
431 CS4265_DAC_CTL_DIF, (1 << 4));
432 snd_soc_component_update_bits(component, CS4265_ADC_CTL,
433 CS4265_ADC_DIF, (1 << 4));
434 snd_soc_component_update_bits(component, CS4265_SPDIF_CTL2,
435 CS4265_SPDIF_CTL2_DIF, (1 << 6));
436 break;
437 case SND_SOC_DAIFMT_RIGHT_J:
438 if (params_width(params) == 16) {
439 snd_soc_component_update_bits(component, CS4265_DAC_CTL,
440 CS4265_DAC_CTL_DIF, (2 << 4));
441 snd_soc_component_update_bits(component, CS4265_SPDIF_CTL2,
442 CS4265_SPDIF_CTL2_DIF, (2 << 6));
443 } else {
444 snd_soc_component_update_bits(component, CS4265_DAC_CTL,
445 CS4265_DAC_CTL_DIF, (3 << 4));
446 snd_soc_component_update_bits(component, CS4265_SPDIF_CTL2,
447 CS4265_SPDIF_CTL2_DIF, (3 << 6));
448 }
449 break;
450 case SND_SOC_DAIFMT_LEFT_J:
451 snd_soc_component_update_bits(component, CS4265_DAC_CTL,
452 CS4265_DAC_CTL_DIF, 0);
453 snd_soc_component_update_bits(component, CS4265_ADC_CTL,
454 CS4265_ADC_DIF, 0);
455 snd_soc_component_update_bits(component, CS4265_SPDIF_CTL2,
456 CS4265_SPDIF_CTL2_DIF, 0);
457
458 break;
459 default:
460 return -EINVAL;
461 }
462 return 0;
463 }
464
cs4265_set_bias_level(struct snd_soc_component * component,enum snd_soc_bias_level level)465 static int cs4265_set_bias_level(struct snd_soc_component *component,
466 enum snd_soc_bias_level level)
467 {
468 switch (level) {
469 case SND_SOC_BIAS_ON:
470 break;
471 case SND_SOC_BIAS_PREPARE:
472 snd_soc_component_update_bits(component, CS4265_PWRCTL,
473 CS4265_PWRCTL_PDN, 0);
474 break;
475 case SND_SOC_BIAS_STANDBY:
476 snd_soc_component_update_bits(component, CS4265_PWRCTL,
477 CS4265_PWRCTL_PDN,
478 CS4265_PWRCTL_PDN);
479 break;
480 case SND_SOC_BIAS_OFF:
481 snd_soc_component_update_bits(component, CS4265_PWRCTL,
482 CS4265_PWRCTL_PDN,
483 CS4265_PWRCTL_PDN);
484 break;
485 }
486 return 0;
487 }
488
489 #define CS4265_RATES (SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 | \
490 SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_64000 | \
491 SNDRV_PCM_RATE_88200 | SNDRV_PCM_RATE_96000 | \
492 SNDRV_PCM_RATE_176400 | SNDRV_PCM_RATE_192000)
493
494 #define CS4265_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_U16_LE | \
495 SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_U24_LE | \
496 SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_U32_LE)
497
498 static const struct snd_soc_dai_ops cs4265_ops = {
499 .hw_params = cs4265_pcm_hw_params,
500 .mute_stream = cs4265_mute,
501 .set_fmt = cs4265_set_fmt,
502 .set_sysclk = cs4265_set_sysclk,
503 .no_capture_mute = 1,
504 };
505
506 static struct snd_soc_dai_driver cs4265_dai[] = {
507 {
508 .name = "cs4265-dai1",
509 .playback = {
510 .stream_name = "DAI1 Playback",
511 .channels_min = 1,
512 .channels_max = 2,
513 .rates = CS4265_RATES,
514 .formats = CS4265_FORMATS,
515 },
516 .capture = {
517 .stream_name = "DAI1 Capture",
518 .channels_min = 1,
519 .channels_max = 2,
520 .rates = CS4265_RATES,
521 .formats = CS4265_FORMATS,
522 },
523 .ops = &cs4265_ops,
524 },
525 {
526 .name = "cs4265-dai2",
527 .playback = {
528 .stream_name = "DAI2 Playback",
529 .channels_min = 1,
530 .channels_max = 2,
531 .rates = CS4265_RATES,
532 .formats = CS4265_FORMATS,
533 },
534 .capture = {
535 .stream_name = "DAI2 Capture",
536 .channels_min = 1,
537 .channels_max = 2,
538 .rates = CS4265_RATES,
539 .formats = CS4265_FORMATS,
540 },
541 .ops = &cs4265_ops,
542 },
543 };
544
545 static const struct snd_soc_component_driver soc_component_cs4265 = {
546 .set_bias_level = cs4265_set_bias_level,
547 .controls = cs4265_snd_controls,
548 .num_controls = ARRAY_SIZE(cs4265_snd_controls),
549 .dapm_widgets = cs4265_dapm_widgets,
550 .num_dapm_widgets = ARRAY_SIZE(cs4265_dapm_widgets),
551 .dapm_routes = cs4265_audio_map,
552 .num_dapm_routes = ARRAY_SIZE(cs4265_audio_map),
553 .idle_bias_on = 1,
554 .use_pmdown_time = 1,
555 .endianness = 1,
556 };
557
558 static const struct regmap_config cs4265_regmap = {
559 .reg_bits = 8,
560 .val_bits = 8,
561
562 .max_register = CS4265_MAX_REGISTER,
563 .reg_defaults = cs4265_reg_defaults,
564 .num_reg_defaults = ARRAY_SIZE(cs4265_reg_defaults),
565 .readable_reg = cs4265_readable_register,
566 .volatile_reg = cs4265_volatile_register,
567 .cache_type = REGCACHE_MAPLE,
568 };
569
cs4265_i2c_probe(struct i2c_client * i2c_client)570 static int cs4265_i2c_probe(struct i2c_client *i2c_client)
571 {
572 struct cs4265_private *cs4265;
573 int ret;
574 unsigned int devid = 0;
575 unsigned int reg;
576
577 cs4265 = devm_kzalloc(&i2c_client->dev, sizeof(struct cs4265_private),
578 GFP_KERNEL);
579 if (cs4265 == NULL)
580 return -ENOMEM;
581
582 cs4265->regmap = devm_regmap_init_i2c(i2c_client, &cs4265_regmap);
583 if (IS_ERR(cs4265->regmap)) {
584 ret = PTR_ERR(cs4265->regmap);
585 dev_err(&i2c_client->dev, "regmap_init() failed: %d\n", ret);
586 return ret;
587 }
588
589 cs4265->reset_gpio = devm_gpiod_get_optional(&i2c_client->dev,
590 "reset", GPIOD_OUT_LOW);
591 if (IS_ERR(cs4265->reset_gpio))
592 return PTR_ERR(cs4265->reset_gpio);
593
594 if (cs4265->reset_gpio) {
595 mdelay(1);
596 gpiod_set_value_cansleep(cs4265->reset_gpio, 1);
597 }
598
599 i2c_set_clientdata(i2c_client, cs4265);
600
601 ret = regmap_read(cs4265->regmap, CS4265_CHIP_ID, ®);
602 if (ret) {
603 dev_err(&i2c_client->dev, "Failed to read chip ID: %d\n", ret);
604 return ret;
605 }
606
607 devid = reg & CS4265_CHIP_ID_MASK;
608 if (devid != CS4265_CHIP_ID_VAL) {
609 ret = -ENODEV;
610 dev_err(&i2c_client->dev,
611 "CS4265 Part Number ID: 0x%x Expected: 0x%x\n",
612 devid >> 4, CS4265_CHIP_ID_VAL >> 4);
613 return ret;
614 }
615 dev_info(&i2c_client->dev,
616 "CS4265 Version %x\n",
617 reg & CS4265_REV_ID_MASK);
618
619 regmap_write(cs4265->regmap, CS4265_PWRCTL, 0x0F);
620
621 return devm_snd_soc_register_component(&i2c_client->dev,
622 &soc_component_cs4265, cs4265_dai,
623 ARRAY_SIZE(cs4265_dai));
624 }
625
cs4265_i2c_remove(struct i2c_client * i2c)626 static void cs4265_i2c_remove(struct i2c_client *i2c)
627 {
628 struct cs4265_private *cs4265 = i2c_get_clientdata(i2c);
629
630 if (cs4265->reset_gpio)
631 gpiod_set_value_cansleep(cs4265->reset_gpio, 0);
632 }
633
634 static const struct of_device_id cs4265_of_match[] = {
635 { .compatible = "cirrus,cs4265", },
636 { }
637 };
638 MODULE_DEVICE_TABLE(of, cs4265_of_match);
639
640 static const struct i2c_device_id cs4265_id[] = {
641 { "cs4265" },
642 { }
643 };
644 MODULE_DEVICE_TABLE(i2c, cs4265_id);
645
646 static struct i2c_driver cs4265_i2c_driver = {
647 .driver = {
648 .name = "cs4265",
649 .of_match_table = cs4265_of_match,
650 },
651 .id_table = cs4265_id,
652 .probe = cs4265_i2c_probe,
653 .remove = cs4265_i2c_remove,
654 };
655
656 module_i2c_driver(cs4265_i2c_driver);
657
658 MODULE_DESCRIPTION("ASoC CS4265 driver");
659 MODULE_AUTHOR("Paul Handrigan, Cirrus Logic Inc, <paul.handrigan@cirrus.com>");
660 MODULE_LICENSE("GPL");
661