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8#include <linux/i2c.h>
9#include <linux/gpio/consumer.h>
10#include <linux/module.h>
11#include <linux/of_device.h>
12#include <linux/of_gpio.h>
13#include <linux/regmap.h>
14#include <linux/slab.h>
15
16#include <sound/asoundef.h>
17#include <sound/core.h>
18#include <sound/initval.h>
19#include <sound/soc.h>
20
21#define AK4118_REG_CLK_PWR_CTL 0x00
22#define AK4118_REG_FORMAT_CTL 0x01
23#define AK4118_REG_IO_CTL0 0x02
24#define AK4118_REG_IO_CTL1 0x03
25#define AK4118_REG_INT0_MASK 0x04
26#define AK4118_REG_INT1_MASK 0x05
27#define AK4118_REG_RCV_STATUS0 0x06
28#define AK4118_REG_RCV_STATUS1 0x07
29#define AK4118_REG_RXCHAN_STATUS0 0x08
30#define AK4118_REG_RXCHAN_STATUS1 0x09
31#define AK4118_REG_RXCHAN_STATUS2 0x0a
32#define AK4118_REG_RXCHAN_STATUS3 0x0b
33#define AK4118_REG_RXCHAN_STATUS4 0x0c
34#define AK4118_REG_TXCHAN_STATUS0 0x0d
35#define AK4118_REG_TXCHAN_STATUS1 0x0e
36#define AK4118_REG_TXCHAN_STATUS2 0x0f
37#define AK4118_REG_TXCHAN_STATUS3 0x10
38#define AK4118_REG_TXCHAN_STATUS4 0x11
39#define AK4118_REG_BURST_PREAMB_PC0 0x12
40#define AK4118_REG_BURST_PREAMB_PC1 0x13
41#define AK4118_REG_BURST_PREAMB_PD0 0x14
42#define AK4118_REG_BURST_PREAMB_PD1 0x15
43#define AK4118_REG_QSUB_CTL 0x16
44#define AK4118_REG_QSUB_TRACK 0x17
45#define AK4118_REG_QSUB_INDEX 0x18
46#define AK4118_REG_QSUB_MIN 0x19
47#define AK4118_REG_QSUB_SEC 0x1a
48#define AK4118_REG_QSUB_FRAME 0x1b
49#define AK4118_REG_QSUB_ZERO 0x1c
50#define AK4118_REG_QSUB_ABS_MIN 0x1d
51#define AK4118_REG_QSUB_ABS_SEC 0x1e
52#define AK4118_REG_QSUB_ABS_FRAME 0x1f
53#define AK4118_REG_GPE 0x20
54#define AK4118_REG_GPDR 0x21
55#define AK4118_REG_GPSCR 0x22
56#define AK4118_REG_GPLR 0x23
57#define AK4118_REG_DAT_MASK_DTS 0x24
58#define AK4118_REG_RX_DETECT 0x25
59#define AK4118_REG_STC_DAT_DETECT 0x26
60#define AK4118_REG_RXCHAN_STATUS5 0x27
61#define AK4118_REG_TXCHAN_STATUS5 0x28
62#define AK4118_REG_MAX 0x29
63
64#define AK4118_REG_FORMAT_CTL_DIF0 (1 << 4)
65#define AK4118_REG_FORMAT_CTL_DIF1 (1 << 5)
66#define AK4118_REG_FORMAT_CTL_DIF2 (1 << 6)
67
68struct ak4118_priv {
69 struct regmap *regmap;
70 struct gpio_desc *reset;
71 struct gpio_desc *irq;
72 struct snd_soc_component *component;
73};
74
75static const struct reg_default ak4118_reg_defaults[] = {
76 {AK4118_REG_CLK_PWR_CTL, 0x43},
77 {AK4118_REG_FORMAT_CTL, 0x6a},
78 {AK4118_REG_IO_CTL0, 0x88},
79 {AK4118_REG_IO_CTL1, 0x48},
80 {AK4118_REG_INT0_MASK, 0xee},
81 {AK4118_REG_INT1_MASK, 0xb5},
82 {AK4118_REG_RCV_STATUS0, 0x00},
83 {AK4118_REG_RCV_STATUS1, 0x10},
84 {AK4118_REG_TXCHAN_STATUS0, 0x00},
85 {AK4118_REG_TXCHAN_STATUS1, 0x00},
86 {AK4118_REG_TXCHAN_STATUS2, 0x00},
87 {AK4118_REG_TXCHAN_STATUS3, 0x00},
88 {AK4118_REG_TXCHAN_STATUS4, 0x00},
89 {AK4118_REG_GPE, 0x77},
90 {AK4118_REG_GPDR, 0x00},
91 {AK4118_REG_GPSCR, 0x00},
92 {AK4118_REG_GPLR, 0x00},
93 {AK4118_REG_DAT_MASK_DTS, 0x3f},
94 {AK4118_REG_RX_DETECT, 0x00},
95 {AK4118_REG_STC_DAT_DETECT, 0x00},
96 {AK4118_REG_TXCHAN_STATUS5, 0x00},
97};
98
99static const char * const ak4118_input_select_txt[] = {
100 "RX0", "RX1", "RX2", "RX3", "RX4", "RX5", "RX6", "RX7",
101};
102static SOC_ENUM_SINGLE_DECL(ak4118_insel_enum, AK4118_REG_IO_CTL1, 0x0,
103 ak4118_input_select_txt);
104
105static const struct snd_kcontrol_new ak4118_input_mux_controls =
106 SOC_DAPM_ENUM("Input Select", ak4118_insel_enum);
107
108static const char * const ak4118_iec958_fs_txt[] = {
109 "44100", "48000", "32000", "22050", "11025", "24000", "16000", "88200",
110 "8000", "96000", "64000", "176400", "192000",
111};
112
113static const int ak4118_iec958_fs_val[] = {
114 0x0, 0x2, 0x3, 0x4, 0x5, 0x6, 0x7, 0x8, 0x9, 0xA, 0xB, 0xC, 0xE,
115};
116
117static SOC_VALUE_ENUM_SINGLE_DECL(ak4118_iec958_fs_enum, AK4118_REG_RCV_STATUS1,
118 0x4, 0x4, ak4118_iec958_fs_txt,
119 ak4118_iec958_fs_val);
120
121static struct snd_kcontrol_new ak4118_iec958_controls[] = {
122 SOC_SINGLE("IEC958 Parity Errors", AK4118_REG_RCV_STATUS0, 0, 1, 0),
123 SOC_SINGLE("IEC958 No Audio", AK4118_REG_RCV_STATUS0, 1, 1, 0),
124 SOC_SINGLE("IEC958 PLL Lock", AK4118_REG_RCV_STATUS0, 4, 1, 1),
125 SOC_SINGLE("IEC958 Non PCM", AK4118_REG_RCV_STATUS0, 6, 1, 0),
126 SOC_ENUM("IEC958 Sampling Freq", ak4118_iec958_fs_enum),
127};
128
129static const struct snd_soc_dapm_widget ak4118_dapm_widgets[] = {
130 SND_SOC_DAPM_INPUT("INRX0"),
131 SND_SOC_DAPM_INPUT("INRX1"),
132 SND_SOC_DAPM_INPUT("INRX2"),
133 SND_SOC_DAPM_INPUT("INRX3"),
134 SND_SOC_DAPM_INPUT("INRX4"),
135 SND_SOC_DAPM_INPUT("INRX5"),
136 SND_SOC_DAPM_INPUT("INRX6"),
137 SND_SOC_DAPM_INPUT("INRX7"),
138 SND_SOC_DAPM_MUX("Input Mux", SND_SOC_NOPM, 0, 0,
139 &ak4118_input_mux_controls),
140};
141
142static const struct snd_soc_dapm_route ak4118_dapm_routes[] = {
143 {"Input Mux", "RX0", "INRX0"},
144 {"Input Mux", "RX1", "INRX1"},
145 {"Input Mux", "RX2", "INRX2"},
146 {"Input Mux", "RX3", "INRX3"},
147 {"Input Mux", "RX4", "INRX4"},
148 {"Input Mux", "RX5", "INRX5"},
149 {"Input Mux", "RX6", "INRX6"},
150 {"Input Mux", "RX7", "INRX7"},
151};
152
153
154static int ak4118_set_dai_fmt_provider(struct ak4118_priv *ak4118,
155 unsigned int format)
156{
157 int dif;
158
159 switch (format & SND_SOC_DAIFMT_FORMAT_MASK) {
160 case SND_SOC_DAIFMT_I2S:
161 dif = AK4118_REG_FORMAT_CTL_DIF0 | AK4118_REG_FORMAT_CTL_DIF2;
162 break;
163 case SND_SOC_DAIFMT_RIGHT_J:
164 dif = AK4118_REG_FORMAT_CTL_DIF0 | AK4118_REG_FORMAT_CTL_DIF1;
165 break;
166 case SND_SOC_DAIFMT_LEFT_J:
167 dif = AK4118_REG_FORMAT_CTL_DIF2;
168 break;
169 default:
170 return -ENOTSUPP;
171 }
172
173 return dif;
174}
175
176static int ak4118_set_dai_fmt_consumer(struct ak4118_priv *ak4118,
177 unsigned int format)
178{
179 int dif;
180
181 switch (format & SND_SOC_DAIFMT_FORMAT_MASK) {
182 case SND_SOC_DAIFMT_I2S:
183 dif = AK4118_REG_FORMAT_CTL_DIF0 | AK4118_REG_FORMAT_CTL_DIF1 |
184 AK4118_REG_FORMAT_CTL_DIF2;
185 break;
186 case SND_SOC_DAIFMT_LEFT_J:
187 dif = AK4118_REG_FORMAT_CTL_DIF1 | AK4118_REG_FORMAT_CTL_DIF2;
188 break;
189 default:
190 return -ENOTSUPP;
191 }
192
193 return dif;
194}
195
196static int ak4118_set_dai_fmt(struct snd_soc_dai *dai,
197 unsigned int format)
198{
199 struct snd_soc_component *component = dai->component;
200 struct ak4118_priv *ak4118 = snd_soc_component_get_drvdata(component);
201 int dif;
202 int ret = 0;
203
204 switch (format & SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) {
205 case SND_SOC_DAIFMT_CBP_CFP:
206 dif = ak4118_set_dai_fmt_provider(ak4118, format);
207 break;
208 case SND_SOC_DAIFMT_CBC_CFC:
209 dif = ak4118_set_dai_fmt_consumer(ak4118, format);
210 break;
211 default:
212 ret = -ENOTSUPP;
213 goto exit;
214 }
215
216
217 if (dif < 0) {
218 ret = dif;
219 goto exit;
220 }
221
222 ret = regmap_update_bits(ak4118->regmap, AK4118_REG_FORMAT_CTL,
223 AK4118_REG_FORMAT_CTL_DIF0 |
224 AK4118_REG_FORMAT_CTL_DIF1 |
225 AK4118_REG_FORMAT_CTL_DIF2, dif);
226 if (ret < 0)
227 goto exit;
228
229exit:
230 return ret;
231}
232
233static int ak4118_hw_params(struct snd_pcm_substream *substream,
234 struct snd_pcm_hw_params *params,
235 struct snd_soc_dai *dai)
236{
237 return 0;
238}
239
240static const struct snd_soc_dai_ops ak4118_dai_ops = {
241 .hw_params = ak4118_hw_params,
242 .set_fmt = ak4118_set_dai_fmt,
243};
244
245static struct snd_soc_dai_driver ak4118_dai = {
246 .name = "ak4118-hifi",
247 .capture = {
248 .stream_name = "Capture",
249 .channels_min = 2,
250 .channels_max = 2,
251 .rates = SNDRV_PCM_RATE_22050 | SNDRV_PCM_RATE_32000 |
252 SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000 |
253 SNDRV_PCM_RATE_88200 | SNDRV_PCM_RATE_96000 |
254 SNDRV_PCM_RATE_176400 | SNDRV_PCM_RATE_192000,
255 .formats = SNDRV_PCM_FMTBIT_S16_LE |
256 SNDRV_PCM_FMTBIT_S24_3LE |
257 SNDRV_PCM_FMTBIT_S24_LE
258 },
259 .ops = &ak4118_dai_ops,
260};
261
262static irqreturn_t ak4118_irq_handler(int irq, void *data)
263{
264 struct ak4118_priv *ak4118 = data;
265 struct snd_soc_component *component = ak4118->component;
266 struct snd_kcontrol_new *kctl_new;
267 struct snd_kcontrol *kctl;
268 struct snd_ctl_elem_id *id;
269 unsigned int i;
270
271 if (!component)
272 return IRQ_NONE;
273
274 for (i = 0; i < ARRAY_SIZE(ak4118_iec958_controls); i++) {
275 kctl_new = &ak4118_iec958_controls[i];
276 kctl = snd_soc_card_get_kcontrol(component->card,
277 kctl_new->name);
278 if (!kctl)
279 continue;
280 id = &kctl->id;
281 snd_ctl_notify(component->card->snd_card,
282 SNDRV_CTL_EVENT_MASK_VALUE, id);
283 }
284
285 return IRQ_HANDLED;
286}
287
288static int ak4118_probe(struct snd_soc_component *component)
289{
290 struct ak4118_priv *ak4118 = snd_soc_component_get_drvdata(component);
291 int ret = 0;
292
293 ak4118->component = component;
294
295
296 gpiod_set_value(ak4118->reset, 0);
297
298
299 ret = regmap_write(ak4118->regmap, AK4118_REG_INT1_MASK, 0x00);
300 if (ret < 0) {
301 dev_err(component->dev,
302 "failed to write regmap 0x%x 0x%x: %d\n",
303 AK4118_REG_INT1_MASK, 0x00, ret);
304 return ret;
305 }
306
307
308 ret = regmap_write(ak4118->regmap, AK4118_REG_RX_DETECT, 0xff);
309 if (ret < 0) {
310 dev_err(component->dev,
311 "failed to write regmap 0x%x 0x%x: %d\n",
312 AK4118_REG_RX_DETECT, 0xff, ret);
313 return ret;
314 }
315
316 ret = snd_soc_add_component_controls(component, ak4118_iec958_controls,
317 ARRAY_SIZE(ak4118_iec958_controls));
318 if (ret) {
319 dev_err(component->dev,
320 "failed to add component kcontrols: %d\n", ret);
321 return ret;
322 }
323
324 return 0;
325}
326
327static void ak4118_remove(struct snd_soc_component *component)
328{
329 struct ak4118_priv *ak4118 = snd_soc_component_get_drvdata(component);
330
331
332 gpiod_set_value(ak4118->reset, 1);
333}
334
335static const struct snd_soc_component_driver soc_component_drv_ak4118 = {
336 .probe = ak4118_probe,
337 .remove = ak4118_remove,
338 .dapm_widgets = ak4118_dapm_widgets,
339 .num_dapm_widgets = ARRAY_SIZE(ak4118_dapm_widgets),
340 .dapm_routes = ak4118_dapm_routes,
341 .num_dapm_routes = ARRAY_SIZE(ak4118_dapm_routes),
342 .idle_bias_on = 1,
343 .use_pmdown_time = 1,
344 .endianness = 1,
345 .non_legacy_dai_naming = 1,
346};
347
348static const struct regmap_config ak4118_regmap = {
349 .reg_bits = 8,
350 .val_bits = 8,
351
352 .reg_defaults = ak4118_reg_defaults,
353 .num_reg_defaults = ARRAY_SIZE(ak4118_reg_defaults),
354
355 .cache_type = REGCACHE_NONE,
356 .max_register = AK4118_REG_MAX - 1,
357};
358
359static int ak4118_i2c_probe(struct i2c_client *i2c,
360 const struct i2c_device_id *id)
361{
362 struct ak4118_priv *ak4118;
363 int ret;
364
365 ak4118 = devm_kzalloc(&i2c->dev, sizeof(struct ak4118_priv),
366 GFP_KERNEL);
367 if (ak4118 == NULL)
368 return -ENOMEM;
369
370 ak4118->regmap = devm_regmap_init_i2c(i2c, &ak4118_regmap);
371 if (IS_ERR(ak4118->regmap))
372 return PTR_ERR(ak4118->regmap);
373
374 i2c_set_clientdata(i2c, ak4118);
375
376 ak4118->reset = devm_gpiod_get(&i2c->dev, "reset", GPIOD_OUT_HIGH);
377 if (IS_ERR(ak4118->reset)) {
378 ret = PTR_ERR(ak4118->reset);
379 if (ret != -EPROBE_DEFER)
380 dev_err(&i2c->dev, "Failed to get reset: %d\n", ret);
381 return ret;
382 }
383
384 ak4118->irq = devm_gpiod_get(&i2c->dev, "irq", GPIOD_IN);
385 if (IS_ERR(ak4118->irq)) {
386 ret = PTR_ERR(ak4118->irq);
387 if (ret != -EPROBE_DEFER)
388 dev_err(&i2c->dev, "Failed to get IRQ: %d\n", ret);
389 return ret;
390 }
391
392 ret = devm_request_threaded_irq(&i2c->dev, gpiod_to_irq(ak4118->irq),
393 NULL, ak4118_irq_handler,
394 IRQF_TRIGGER_RISING | IRQF_ONESHOT,
395 "ak4118-irq", ak4118);
396 if (ret < 0) {
397 dev_err(&i2c->dev, "Fail to request_irq: %d\n", ret);
398 return ret;
399 }
400
401 return devm_snd_soc_register_component(&i2c->dev,
402 &soc_component_drv_ak4118, &ak4118_dai, 1);
403}
404
405#ifdef CONFIG_OF
406static const struct of_device_id ak4118_of_match[] = {
407 { .compatible = "asahi-kasei,ak4118", },
408 {}
409};
410MODULE_DEVICE_TABLE(of, ak4118_of_match);
411#endif
412
413static const struct i2c_device_id ak4118_id_table[] = {
414 { "ak4118", 0 },
415 {}
416};
417MODULE_DEVICE_TABLE(i2c, ak4118_id_table);
418
419static struct i2c_driver ak4118_i2c_driver = {
420 .driver = {
421 .name = "ak4118",
422 .of_match_table = of_match_ptr(ak4118_of_match),
423 },
424 .id_table = ak4118_id_table,
425 .probe = ak4118_i2c_probe,
426};
427
428module_i2c_driver(ak4118_i2c_driver);
429
430MODULE_DESCRIPTION("Asahi Kasei AK4118 ALSA SoC driver");
431MODULE_AUTHOR("Adrien Charruel <adrien.charruel@devialet.com>");
432MODULE_LICENSE("GPL");
433
