1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * ak4118.c -- Asahi Kasei ALSA Soc Audio driver
4 *
5 * Copyright 2018 DEVIALET
6 */
7
8 #include <linux/i2c.h>
9 #include <linux/gpio/consumer.h>
10 #include <linux/module.h>
11 #include <linux/of.h>
12 #include <linux/regmap.h>
13 #include <linux/slab.h>
14
15 #include <sound/asoundef.h>
16 #include <sound/core.h>
17 #include <sound/initval.h>
18 #include <sound/soc.h>
19
20 #define AK4118_REG_CLK_PWR_CTL 0x00
21 #define AK4118_REG_FORMAT_CTL 0x01
22 #define AK4118_REG_IO_CTL0 0x02
23 #define AK4118_REG_IO_CTL1 0x03
24 #define AK4118_REG_INT0_MASK 0x04
25 #define AK4118_REG_INT1_MASK 0x05
26 #define AK4118_REG_RCV_STATUS0 0x06
27 #define AK4118_REG_RCV_STATUS1 0x07
28 #define AK4118_REG_RXCHAN_STATUS0 0x08
29 #define AK4118_REG_RXCHAN_STATUS1 0x09
30 #define AK4118_REG_RXCHAN_STATUS2 0x0a
31 #define AK4118_REG_RXCHAN_STATUS3 0x0b
32 #define AK4118_REG_RXCHAN_STATUS4 0x0c
33 #define AK4118_REG_TXCHAN_STATUS0 0x0d
34 #define AK4118_REG_TXCHAN_STATUS1 0x0e
35 #define AK4118_REG_TXCHAN_STATUS2 0x0f
36 #define AK4118_REG_TXCHAN_STATUS3 0x10
37 #define AK4118_REG_TXCHAN_STATUS4 0x11
38 #define AK4118_REG_BURST_PREAMB_PC0 0x12
39 #define AK4118_REG_BURST_PREAMB_PC1 0x13
40 #define AK4118_REG_BURST_PREAMB_PD0 0x14
41 #define AK4118_REG_BURST_PREAMB_PD1 0x15
42 #define AK4118_REG_QSUB_CTL 0x16
43 #define AK4118_REG_QSUB_TRACK 0x17
44 #define AK4118_REG_QSUB_INDEX 0x18
45 #define AK4118_REG_QSUB_MIN 0x19
46 #define AK4118_REG_QSUB_SEC 0x1a
47 #define AK4118_REG_QSUB_FRAME 0x1b
48 #define AK4118_REG_QSUB_ZERO 0x1c
49 #define AK4118_REG_QSUB_ABS_MIN 0x1d
50 #define AK4118_REG_QSUB_ABS_SEC 0x1e
51 #define AK4118_REG_QSUB_ABS_FRAME 0x1f
52 #define AK4118_REG_GPE 0x20
53 #define AK4118_REG_GPDR 0x21
54 #define AK4118_REG_GPSCR 0x22
55 #define AK4118_REG_GPLR 0x23
56 #define AK4118_REG_DAT_MASK_DTS 0x24
57 #define AK4118_REG_RX_DETECT 0x25
58 #define AK4118_REG_STC_DAT_DETECT 0x26
59 #define AK4118_REG_RXCHAN_STATUS5 0x27
60 #define AK4118_REG_TXCHAN_STATUS5 0x28
61 #define AK4118_REG_MAX 0x29
62
63 #define AK4118_REG_FORMAT_CTL_DIF0 (1 << 4)
64 #define AK4118_REG_FORMAT_CTL_DIF1 (1 << 5)
65 #define AK4118_REG_FORMAT_CTL_DIF2 (1 << 6)
66
67 struct ak4118_priv {
68 struct regmap *regmap;
69 struct gpio_desc *reset;
70 struct gpio_desc *irq;
71 struct snd_soc_component *component;
72 };
73
74 static const struct reg_default ak4118_reg_defaults[] = {
75 {AK4118_REG_CLK_PWR_CTL, 0x43},
76 {AK4118_REG_FORMAT_CTL, 0x6a},
77 {AK4118_REG_IO_CTL0, 0x88},
78 {AK4118_REG_IO_CTL1, 0x48},
79 {AK4118_REG_INT0_MASK, 0xee},
80 {AK4118_REG_INT1_MASK, 0xb5},
81 {AK4118_REG_RCV_STATUS0, 0x00},
82 {AK4118_REG_RCV_STATUS1, 0x10},
83 {AK4118_REG_TXCHAN_STATUS0, 0x00},
84 {AK4118_REG_TXCHAN_STATUS1, 0x00},
85 {AK4118_REG_TXCHAN_STATUS2, 0x00},
86 {AK4118_REG_TXCHAN_STATUS3, 0x00},
87 {AK4118_REG_TXCHAN_STATUS4, 0x00},
88 {AK4118_REG_GPE, 0x77},
89 {AK4118_REG_GPDR, 0x00},
90 {AK4118_REG_GPSCR, 0x00},
91 {AK4118_REG_GPLR, 0x00},
92 {AK4118_REG_DAT_MASK_DTS, 0x3f},
93 {AK4118_REG_RX_DETECT, 0x00},
94 {AK4118_REG_STC_DAT_DETECT, 0x00},
95 {AK4118_REG_TXCHAN_STATUS5, 0x00},
96 };
97
98 static const char * const ak4118_input_select_txt[] = {
99 "RX0", "RX1", "RX2", "RX3", "RX4", "RX5", "RX6", "RX7",
100 };
101 static SOC_ENUM_SINGLE_DECL(ak4118_insel_enum, AK4118_REG_IO_CTL1, 0x0,
102 ak4118_input_select_txt);
103
104 static const struct snd_kcontrol_new ak4118_input_mux_controls =
105 SOC_DAPM_ENUM("Input Select", ak4118_insel_enum);
106
107 static const char * const ak4118_iec958_fs_txt[] = {
108 "44100", "48000", "32000", "22050", "11025", "24000", "16000", "88200",
109 "8000", "96000", "64000", "176400", "192000",
110 };
111
112 static const int ak4118_iec958_fs_val[] = {
113 0x0, 0x2, 0x3, 0x4, 0x5, 0x6, 0x7, 0x8, 0x9, 0xA, 0xB, 0xC, 0xE,
114 };
115
116 static SOC_VALUE_ENUM_SINGLE_DECL(ak4118_iec958_fs_enum, AK4118_REG_RCV_STATUS1,
117 0x4, 0x4, ak4118_iec958_fs_txt,
118 ak4118_iec958_fs_val);
119
120 static struct snd_kcontrol_new ak4118_iec958_controls[] = {
121 SOC_SINGLE("IEC958 Parity Errors", AK4118_REG_RCV_STATUS0, 0, 1, 0),
122 SOC_SINGLE("IEC958 No Audio", AK4118_REG_RCV_STATUS0, 1, 1, 0),
123 SOC_SINGLE("IEC958 PLL Lock", AK4118_REG_RCV_STATUS0, 4, 1, 1),
124 SOC_SINGLE("IEC958 Non PCM", AK4118_REG_RCV_STATUS0, 6, 1, 0),
125 SOC_ENUM("IEC958 Sampling Freq", ak4118_iec958_fs_enum),
126 };
127
128 static const struct snd_soc_dapm_widget ak4118_dapm_widgets[] = {
129 SND_SOC_DAPM_INPUT("INRX0"),
130 SND_SOC_DAPM_INPUT("INRX1"),
131 SND_SOC_DAPM_INPUT("INRX2"),
132 SND_SOC_DAPM_INPUT("INRX3"),
133 SND_SOC_DAPM_INPUT("INRX4"),
134 SND_SOC_DAPM_INPUT("INRX5"),
135 SND_SOC_DAPM_INPUT("INRX6"),
136 SND_SOC_DAPM_INPUT("INRX7"),
137 SND_SOC_DAPM_MUX("Input Mux", SND_SOC_NOPM, 0, 0,
138 &ak4118_input_mux_controls),
139 };
140
141 static const struct snd_soc_dapm_route ak4118_dapm_routes[] = {
142 {"Input Mux", "RX0", "INRX0"},
143 {"Input Mux", "RX1", "INRX1"},
144 {"Input Mux", "RX2", "INRX2"},
145 {"Input Mux", "RX3", "INRX3"},
146 {"Input Mux", "RX4", "INRX4"},
147 {"Input Mux", "RX5", "INRX5"},
148 {"Input Mux", "RX6", "INRX6"},
149 {"Input Mux", "RX7", "INRX7"},
150 };
151
152
ak4118_set_dai_fmt_provider(struct ak4118_priv * ak4118,unsigned int format)153 static int ak4118_set_dai_fmt_provider(struct ak4118_priv *ak4118,
154 unsigned int format)
155 {
156 int dif;
157
158 switch (format & SND_SOC_DAIFMT_FORMAT_MASK) {
159 case SND_SOC_DAIFMT_I2S:
160 dif = AK4118_REG_FORMAT_CTL_DIF0 | AK4118_REG_FORMAT_CTL_DIF2;
161 break;
162 case SND_SOC_DAIFMT_RIGHT_J:
163 dif = AK4118_REG_FORMAT_CTL_DIF0 | AK4118_REG_FORMAT_CTL_DIF1;
164 break;
165 case SND_SOC_DAIFMT_LEFT_J:
166 dif = AK4118_REG_FORMAT_CTL_DIF2;
167 break;
168 default:
169 return -ENOTSUPP;
170 }
171
172 return dif;
173 }
174
ak4118_set_dai_fmt_consumer(struct ak4118_priv * ak4118,unsigned int format)175 static int ak4118_set_dai_fmt_consumer(struct ak4118_priv *ak4118,
176 unsigned int format)
177 {
178 int dif;
179
180 switch (format & SND_SOC_DAIFMT_FORMAT_MASK) {
181 case SND_SOC_DAIFMT_I2S:
182 dif = AK4118_REG_FORMAT_CTL_DIF0 | AK4118_REG_FORMAT_CTL_DIF1 |
183 AK4118_REG_FORMAT_CTL_DIF2;
184 break;
185 case SND_SOC_DAIFMT_LEFT_J:
186 dif = AK4118_REG_FORMAT_CTL_DIF1 | AK4118_REG_FORMAT_CTL_DIF2;
187 break;
188 default:
189 return -ENOTSUPP;
190 }
191
192 return dif;
193 }
194
ak4118_set_dai_fmt(struct snd_soc_dai * dai,unsigned int format)195 static int ak4118_set_dai_fmt(struct snd_soc_dai *dai,
196 unsigned int format)
197 {
198 struct snd_soc_component *component = dai->component;
199 struct ak4118_priv *ak4118 = snd_soc_component_get_drvdata(component);
200 int dif;
201 int ret = 0;
202
203 switch (format & SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) {
204 case SND_SOC_DAIFMT_CBP_CFP:
205 dif = ak4118_set_dai_fmt_provider(ak4118, format);
206 break;
207 case SND_SOC_DAIFMT_CBC_CFC:
208 dif = ak4118_set_dai_fmt_consumer(ak4118, format);
209 break;
210 default:
211 ret = -ENOTSUPP;
212 goto exit;
213 }
214
215 /* format not supported */
216 if (dif < 0) {
217 ret = dif;
218 goto exit;
219 }
220
221 ret = regmap_update_bits(ak4118->regmap, AK4118_REG_FORMAT_CTL,
222 AK4118_REG_FORMAT_CTL_DIF0 |
223 AK4118_REG_FORMAT_CTL_DIF1 |
224 AK4118_REG_FORMAT_CTL_DIF2, dif);
225 if (ret < 0)
226 goto exit;
227
228 exit:
229 return ret;
230 }
231
ak4118_hw_params(struct snd_pcm_substream * substream,struct snd_pcm_hw_params * params,struct snd_soc_dai * dai)232 static int ak4118_hw_params(struct snd_pcm_substream *substream,
233 struct snd_pcm_hw_params *params,
234 struct snd_soc_dai *dai)
235 {
236 return 0;
237 }
238
239 static const struct snd_soc_dai_ops ak4118_dai_ops = {
240 .hw_params = ak4118_hw_params,
241 .set_fmt = ak4118_set_dai_fmt,
242 };
243
244 static struct snd_soc_dai_driver ak4118_dai = {
245 .name = "ak4118-hifi",
246 .capture = {
247 .stream_name = "Capture",
248 .channels_min = 2,
249 .channels_max = 2,
250 .rates = SNDRV_PCM_RATE_22050 | SNDRV_PCM_RATE_32000 |
251 SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000 |
252 SNDRV_PCM_RATE_88200 | SNDRV_PCM_RATE_96000 |
253 SNDRV_PCM_RATE_176400 | SNDRV_PCM_RATE_192000,
254 .formats = SNDRV_PCM_FMTBIT_S16_LE |
255 SNDRV_PCM_FMTBIT_S24_3LE |
256 SNDRV_PCM_FMTBIT_S24_LE
257 },
258 .ops = &ak4118_dai_ops,
259 };
260
ak4118_irq_handler(int irq,void * data)261 static irqreturn_t ak4118_irq_handler(int irq, void *data)
262 {
263 struct ak4118_priv *ak4118 = data;
264 struct snd_soc_component *component = ak4118->component;
265 struct snd_kcontrol_new *kctl_new;
266 unsigned int i;
267
268 if (!component)
269 return IRQ_NONE;
270
271 for (i = 0; i < ARRAY_SIZE(ak4118_iec958_controls); i++) {
272 kctl_new = &ak4118_iec958_controls[i];
273
274 snd_soc_component_notify_control(component, kctl_new->name);
275 }
276
277 return IRQ_HANDLED;
278 }
279
ak4118_probe(struct snd_soc_component * component)280 static int ak4118_probe(struct snd_soc_component *component)
281 {
282 struct ak4118_priv *ak4118 = snd_soc_component_get_drvdata(component);
283 int ret = 0;
284
285 ak4118->component = component;
286
287 /* release reset */
288 gpiod_set_value(ak4118->reset, 0);
289
290 /* unmask all int1 sources */
291 ret = regmap_write(ak4118->regmap, AK4118_REG_INT1_MASK, 0x00);
292 if (ret < 0) {
293 dev_err(component->dev,
294 "failed to write regmap 0x%x 0x%x: %d\n",
295 AK4118_REG_INT1_MASK, 0x00, ret);
296 return ret;
297 }
298
299 /* rx detect enable on all channels */
300 ret = regmap_write(ak4118->regmap, AK4118_REG_RX_DETECT, 0xff);
301 if (ret < 0) {
302 dev_err(component->dev,
303 "failed to write regmap 0x%x 0x%x: %d\n",
304 AK4118_REG_RX_DETECT, 0xff, ret);
305 return ret;
306 }
307
308 ret = snd_soc_add_component_controls(component, ak4118_iec958_controls,
309 ARRAY_SIZE(ak4118_iec958_controls));
310 if (ret) {
311 dev_err(component->dev,
312 "failed to add component kcontrols: %d\n", ret);
313 return ret;
314 }
315
316 return 0;
317 }
318
ak4118_remove(struct snd_soc_component * component)319 static void ak4118_remove(struct snd_soc_component *component)
320 {
321 struct ak4118_priv *ak4118 = snd_soc_component_get_drvdata(component);
322
323 /* hold reset */
324 gpiod_set_value(ak4118->reset, 1);
325 }
326
327 static const struct snd_soc_component_driver soc_component_drv_ak4118 = {
328 .probe = ak4118_probe,
329 .remove = ak4118_remove,
330 .dapm_widgets = ak4118_dapm_widgets,
331 .num_dapm_widgets = ARRAY_SIZE(ak4118_dapm_widgets),
332 .dapm_routes = ak4118_dapm_routes,
333 .num_dapm_routes = ARRAY_SIZE(ak4118_dapm_routes),
334 .idle_bias_on = 1,
335 .use_pmdown_time = 1,
336 .endianness = 1,
337 };
338
339 static const struct regmap_config ak4118_regmap = {
340 .reg_bits = 8,
341 .val_bits = 8,
342
343 .reg_defaults = ak4118_reg_defaults,
344 .num_reg_defaults = ARRAY_SIZE(ak4118_reg_defaults),
345
346 .cache_type = REGCACHE_NONE,
347 .max_register = AK4118_REG_MAX - 1,
348 };
349
ak4118_i2c_probe(struct i2c_client * i2c)350 static int ak4118_i2c_probe(struct i2c_client *i2c)
351 {
352 struct ak4118_priv *ak4118;
353 int ret;
354
355 ak4118 = devm_kzalloc(&i2c->dev, sizeof(struct ak4118_priv),
356 GFP_KERNEL);
357 if (ak4118 == NULL)
358 return -ENOMEM;
359
360 ak4118->regmap = devm_regmap_init_i2c(i2c, &ak4118_regmap);
361 if (IS_ERR(ak4118->regmap))
362 return PTR_ERR(ak4118->regmap);
363
364 i2c_set_clientdata(i2c, ak4118);
365
366 ak4118->reset = devm_gpiod_get(&i2c->dev, "reset", GPIOD_OUT_HIGH);
367 if (IS_ERR(ak4118->reset))
368 return dev_err_probe(&i2c->dev, PTR_ERR(ak4118->reset),
369 "Failed to get reset\n");
370
371 ak4118->irq = devm_gpiod_get(&i2c->dev, "irq", GPIOD_IN);
372 if (IS_ERR(ak4118->irq))
373 return dev_err_probe(&i2c->dev, PTR_ERR(ak4118->irq),
374 "Failed to get IRQ\n");
375
376 ret = devm_request_threaded_irq(&i2c->dev, gpiod_to_irq(ak4118->irq),
377 NULL, ak4118_irq_handler,
378 IRQF_TRIGGER_RISING | IRQF_ONESHOT,
379 "ak4118-irq", ak4118);
380 if (ret < 0) {
381 dev_err(&i2c->dev, "Fail to request_irq: %d\n", ret);
382 return ret;
383 }
384
385 return devm_snd_soc_register_component(&i2c->dev,
386 &soc_component_drv_ak4118, &ak4118_dai, 1);
387 }
388
389 #ifdef CONFIG_OF
390 static const struct of_device_id ak4118_of_match[] = {
391 { .compatible = "asahi-kasei,ak4118", },
392 {}
393 };
394 MODULE_DEVICE_TABLE(of, ak4118_of_match);
395 #endif
396
397 static const struct i2c_device_id ak4118_id_table[] = {
398 { "ak4118" },
399 {}
400 };
401 MODULE_DEVICE_TABLE(i2c, ak4118_id_table);
402
403 static struct i2c_driver ak4118_i2c_driver = {
404 .driver = {
405 .name = "ak4118",
406 .of_match_table = of_match_ptr(ak4118_of_match),
407 },
408 .id_table = ak4118_id_table,
409 .probe = ak4118_i2c_probe,
410 };
411
412 module_i2c_driver(ak4118_i2c_driver);
413
414 MODULE_DESCRIPTION("Asahi Kasei AK4118 ALSA SoC driver");
415 MODULE_AUTHOR("Adrien Charruel <adrien.charruel@devialet.com>");
416 MODULE_LICENSE("GPL");
417