xref: /openbmc/linux/sound/soc/sunxi/sun4i-codec.c (revision f3539c12)
1 /*
2  * Copyright 2014 Emilio López <emilio@elopez.com.ar>
3  * Copyright 2014 Jon Smirl <jonsmirl@gmail.com>
4  * Copyright 2015 Maxime Ripard <maxime.ripard@free-electrons.com>
5  * Copyright 2015 Adam Sampson <ats@offog.org>
6  *
7  * Based on the Allwinner SDK driver, released under the GPL.
8  *
9  * This program is free software; you can redistribute it and/or modify
10  * it under the terms of the GNU General Public License as published by
11  * the Free Software Foundation; either version 2 of the License, or
12  * (at your option) any later version.
13  *
14  * This program is distributed in the hope that it will be useful,
15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
17  * GNU General Public License for more details.
18  */
19 
20 #include <linux/init.h>
21 #include <linux/kernel.h>
22 #include <linux/module.h>
23 #include <linux/platform_device.h>
24 #include <linux/delay.h>
25 #include <linux/slab.h>
26 #include <linux/of.h>
27 #include <linux/of_platform.h>
28 #include <linux/of_address.h>
29 #include <linux/clk.h>
30 #include <linux/regmap.h>
31 #include <linux/gpio/consumer.h>
32 
33 #include <sound/core.h>
34 #include <sound/pcm.h>
35 #include <sound/pcm_params.h>
36 #include <sound/soc.h>
37 #include <sound/tlv.h>
38 #include <sound/initval.h>
39 #include <sound/dmaengine_pcm.h>
40 
41 /* Codec DAC register offsets and bit fields */
42 #define SUN4I_CODEC_DAC_DPC			(0x00)
43 #define SUN4I_CODEC_DAC_DPC_EN_DA			(31)
44 #define SUN4I_CODEC_DAC_DPC_DVOL			(12)
45 #define SUN4I_CODEC_DAC_FIFOC			(0x04)
46 #define SUN4I_CODEC_DAC_FIFOC_DAC_FS			(29)
47 #define SUN4I_CODEC_DAC_FIFOC_FIR_VERSION		(28)
48 #define SUN4I_CODEC_DAC_FIFOC_SEND_LASAT		(26)
49 #define SUN4I_CODEC_DAC_FIFOC_TX_FIFO_MODE		(24)
50 #define SUN4I_CODEC_DAC_FIFOC_DRQ_CLR_CNT		(21)
51 #define SUN4I_CODEC_DAC_FIFOC_TX_TRIG_LEVEL		(8)
52 #define SUN4I_CODEC_DAC_FIFOC_MONO_EN			(6)
53 #define SUN4I_CODEC_DAC_FIFOC_TX_SAMPLE_BITS		(5)
54 #define SUN4I_CODEC_DAC_FIFOC_DAC_DRQ_EN		(4)
55 #define SUN4I_CODEC_DAC_FIFOC_FIFO_FLUSH		(0)
56 #define SUN4I_CODEC_DAC_FIFOS			(0x08)
57 #define SUN4I_CODEC_DAC_TXDATA			(0x0c)
58 #define SUN4I_CODEC_DAC_ACTL			(0x10)
59 #define SUN4I_CODEC_DAC_ACTL_DACAENR			(31)
60 #define SUN4I_CODEC_DAC_ACTL_DACAENL			(30)
61 #define SUN4I_CODEC_DAC_ACTL_MIXEN			(29)
62 #define SUN4I_CODEC_DAC_ACTL_LDACLMIXS			(15)
63 #define SUN4I_CODEC_DAC_ACTL_RDACRMIXS			(14)
64 #define SUN4I_CODEC_DAC_ACTL_LDACRMIXS			(13)
65 #define SUN4I_CODEC_DAC_ACTL_DACPAS			(8)
66 #define SUN4I_CODEC_DAC_ACTL_MIXPAS			(7)
67 #define SUN4I_CODEC_DAC_ACTL_PA_MUTE			(6)
68 #define SUN4I_CODEC_DAC_ACTL_PA_VOL			(0)
69 #define SUN4I_CODEC_DAC_TUNE			(0x14)
70 #define SUN4I_CODEC_DAC_DEBUG			(0x18)
71 
72 /* Codec ADC register offsets and bit fields */
73 #define SUN4I_CODEC_ADC_FIFOC			(0x1c)
74 #define SUN4I_CODEC_ADC_FIFOC_ADC_FS			(29)
75 #define SUN4I_CODEC_ADC_FIFOC_EN_AD			(28)
76 #define SUN4I_CODEC_ADC_FIFOC_RX_FIFO_MODE		(24)
77 #define SUN4I_CODEC_ADC_FIFOC_RX_TRIG_LEVEL		(8)
78 #define SUN4I_CODEC_ADC_FIFOC_MONO_EN			(7)
79 #define SUN4I_CODEC_ADC_FIFOC_RX_SAMPLE_BITS		(6)
80 #define SUN4I_CODEC_ADC_FIFOC_ADC_DRQ_EN		(4)
81 #define SUN4I_CODEC_ADC_FIFOC_FIFO_FLUSH		(0)
82 #define SUN4I_CODEC_ADC_FIFOS			(0x20)
83 #define SUN4I_CODEC_ADC_RXDATA			(0x24)
84 #define SUN4I_CODEC_ADC_ACTL			(0x28)
85 #define SUN4I_CODEC_ADC_ACTL_ADC_R_EN			(31)
86 #define SUN4I_CODEC_ADC_ACTL_ADC_L_EN			(30)
87 #define SUN4I_CODEC_ADC_ACTL_PREG1EN			(29)
88 #define SUN4I_CODEC_ADC_ACTL_PREG2EN			(28)
89 #define SUN4I_CODEC_ADC_ACTL_VMICEN			(27)
90 #define SUN4I_CODEC_ADC_ACTL_VADCG			(20)
91 #define SUN4I_CODEC_ADC_ACTL_ADCIS			(17)
92 #define SUN4I_CODEC_ADC_ACTL_PA_EN			(4)
93 #define SUN4I_CODEC_ADC_ACTL_DDE			(3)
94 #define SUN4I_CODEC_ADC_DEBUG			(0x2c)
95 
96 /* Other various ADC registers */
97 #define SUN4I_CODEC_DAC_TXCNT			(0x30)
98 #define SUN4I_CODEC_ADC_RXCNT			(0x34)
99 #define SUN4I_CODEC_AC_SYS_VERI			(0x38)
100 #define SUN4I_CODEC_AC_MIC_PHONE_CAL		(0x3c)
101 
102 struct sun4i_codec {
103 	struct device	*dev;
104 	struct regmap	*regmap;
105 	struct clk	*clk_apb;
106 	struct clk	*clk_module;
107 	struct gpio_desc *gpio_pa;
108 
109 	struct snd_dmaengine_dai_dma_data	capture_dma_data;
110 	struct snd_dmaengine_dai_dma_data	playback_dma_data;
111 };
112 
113 static void sun4i_codec_start_playback(struct sun4i_codec *scodec)
114 {
115 	/* Flush TX FIFO */
116 	regmap_update_bits(scodec->regmap, SUN4I_CODEC_DAC_FIFOC,
117 			   BIT(SUN4I_CODEC_DAC_FIFOC_FIFO_FLUSH),
118 			   BIT(SUN4I_CODEC_DAC_FIFOC_FIFO_FLUSH));
119 
120 	/* Enable DAC DRQ */
121 	regmap_update_bits(scodec->regmap, SUN4I_CODEC_DAC_FIFOC,
122 			   BIT(SUN4I_CODEC_DAC_FIFOC_DAC_DRQ_EN),
123 			   BIT(SUN4I_CODEC_DAC_FIFOC_DAC_DRQ_EN));
124 }
125 
126 static void sun4i_codec_stop_playback(struct sun4i_codec *scodec)
127 {
128 	/* Disable DAC DRQ */
129 	regmap_update_bits(scodec->regmap, SUN4I_CODEC_DAC_FIFOC,
130 			   BIT(SUN4I_CODEC_DAC_FIFOC_DAC_DRQ_EN),
131 			   0);
132 }
133 
134 static void sun4i_codec_start_capture(struct sun4i_codec *scodec)
135 {
136 	/* Enable ADC DRQ */
137 	regmap_update_bits(scodec->regmap, SUN4I_CODEC_ADC_FIFOC,
138 			   BIT(SUN4I_CODEC_ADC_FIFOC_ADC_DRQ_EN),
139 			   BIT(SUN4I_CODEC_ADC_FIFOC_ADC_DRQ_EN));
140 }
141 
142 static void sun4i_codec_stop_capture(struct sun4i_codec *scodec)
143 {
144 	/* Disable ADC DRQ */
145 	regmap_update_bits(scodec->regmap, SUN4I_CODEC_ADC_FIFOC,
146 			   BIT(SUN4I_CODEC_ADC_FIFOC_ADC_DRQ_EN), 0);
147 }
148 
149 static int sun4i_codec_trigger(struct snd_pcm_substream *substream, int cmd,
150 			       struct snd_soc_dai *dai)
151 {
152 	struct snd_soc_pcm_runtime *rtd = substream->private_data;
153 	struct sun4i_codec *scodec = snd_soc_card_get_drvdata(rtd->card);
154 
155 	switch (cmd) {
156 	case SNDRV_PCM_TRIGGER_START:
157 	case SNDRV_PCM_TRIGGER_RESUME:
158 	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
159 		if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
160 			sun4i_codec_start_playback(scodec);
161 		else
162 			sun4i_codec_start_capture(scodec);
163 		break;
164 
165 	case SNDRV_PCM_TRIGGER_STOP:
166 	case SNDRV_PCM_TRIGGER_SUSPEND:
167 	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
168 		if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
169 			sun4i_codec_stop_playback(scodec);
170 		else
171 			sun4i_codec_stop_capture(scodec);
172 		break;
173 
174 	default:
175 		return -EINVAL;
176 	}
177 
178 	return 0;
179 }
180 
181 static int sun4i_codec_prepare_capture(struct snd_pcm_substream *substream,
182 				       struct snd_soc_dai *dai)
183 {
184 	struct snd_soc_pcm_runtime *rtd = substream->private_data;
185 	struct sun4i_codec *scodec = snd_soc_card_get_drvdata(rtd->card);
186 
187 
188 	/* Flush RX FIFO */
189 	regmap_update_bits(scodec->regmap, SUN4I_CODEC_ADC_FIFOC,
190 			   BIT(SUN4I_CODEC_ADC_FIFOC_FIFO_FLUSH),
191 			   BIT(SUN4I_CODEC_ADC_FIFOC_FIFO_FLUSH));
192 
193 
194 	/* Set RX FIFO trigger level */
195 	regmap_update_bits(scodec->regmap, SUN4I_CODEC_ADC_FIFOC,
196 			   0xf << SUN4I_CODEC_ADC_FIFOC_RX_TRIG_LEVEL,
197 			   0x7 << SUN4I_CODEC_ADC_FIFOC_RX_TRIG_LEVEL);
198 
199 	/*
200 	 * FIXME: Undocumented in the datasheet, but
201 	 *        Allwinner's code mentions that it is related
202 	 *        related to microphone gain
203 	 */
204 	regmap_update_bits(scodec->regmap, SUN4I_CODEC_ADC_ACTL,
205 			   0x3 << 25,
206 			   0x1 << 25);
207 
208 	if (of_device_is_compatible(scodec->dev->of_node,
209 				    "allwinner,sun7i-a20-codec"))
210 		/* FIXME: Undocumented bits */
211 		regmap_update_bits(scodec->regmap, SUN4I_CODEC_DAC_TUNE,
212 				   0x3 << 8,
213 				   0x1 << 8);
214 
215 	/* Fill most significant bits with valid data MSB */
216 	regmap_update_bits(scodec->regmap, SUN4I_CODEC_ADC_FIFOC,
217 			   BIT(SUN4I_CODEC_ADC_FIFOC_RX_FIFO_MODE),
218 			   BIT(SUN4I_CODEC_ADC_FIFOC_RX_FIFO_MODE));
219 
220 	return 0;
221 }
222 
223 static int sun4i_codec_prepare_playback(struct snd_pcm_substream *substream,
224 					struct snd_soc_dai *dai)
225 {
226 	struct snd_soc_pcm_runtime *rtd = substream->private_data;
227 	struct sun4i_codec *scodec = snd_soc_card_get_drvdata(rtd->card);
228 	u32 val;
229 
230 	/* Flush the TX FIFO */
231 	regmap_update_bits(scodec->regmap, SUN4I_CODEC_DAC_FIFOC,
232 			   BIT(SUN4I_CODEC_DAC_FIFOC_FIFO_FLUSH),
233 			   BIT(SUN4I_CODEC_DAC_FIFOC_FIFO_FLUSH));
234 
235 	/* Set TX FIFO Empty Trigger Level */
236 	regmap_update_bits(scodec->regmap, SUN4I_CODEC_DAC_FIFOC,
237 			   0x3f << SUN4I_CODEC_DAC_FIFOC_TX_TRIG_LEVEL,
238 			   0xf << SUN4I_CODEC_DAC_FIFOC_TX_TRIG_LEVEL);
239 
240 	if (substream->runtime->rate > 32000)
241 		/* Use 64 bits FIR filter */
242 		val = 0;
243 	else
244 		/* Use 32 bits FIR filter */
245 		val = BIT(SUN4I_CODEC_DAC_FIFOC_FIR_VERSION);
246 
247 	regmap_update_bits(scodec->regmap, SUN4I_CODEC_DAC_FIFOC,
248 			   BIT(SUN4I_CODEC_DAC_FIFOC_FIR_VERSION),
249 			   val);
250 
251 	/* Send zeros when we have an underrun */
252 	regmap_update_bits(scodec->regmap, SUN4I_CODEC_DAC_FIFOC,
253 			   BIT(SUN4I_CODEC_DAC_FIFOC_SEND_LASAT),
254 			   0);
255 
256 	return 0;
257 };
258 
259 static int sun4i_codec_prepare(struct snd_pcm_substream *substream,
260 			       struct snd_soc_dai *dai)
261 {
262 	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
263 		return sun4i_codec_prepare_playback(substream, dai);
264 
265 	return sun4i_codec_prepare_capture(substream, dai);
266 }
267 
268 static unsigned long sun4i_codec_get_mod_freq(struct snd_pcm_hw_params *params)
269 {
270 	unsigned int rate = params_rate(params);
271 
272 	switch (rate) {
273 	case 176400:
274 	case 88200:
275 	case 44100:
276 	case 33075:
277 	case 22050:
278 	case 14700:
279 	case 11025:
280 	case 7350:
281 		return 22579200;
282 
283 	case 192000:
284 	case 96000:
285 	case 48000:
286 	case 32000:
287 	case 24000:
288 	case 16000:
289 	case 12000:
290 	case 8000:
291 		return 24576000;
292 
293 	default:
294 		return 0;
295 	}
296 }
297 
298 static int sun4i_codec_get_hw_rate(struct snd_pcm_hw_params *params)
299 {
300 	unsigned int rate = params_rate(params);
301 
302 	switch (rate) {
303 	case 192000:
304 	case 176400:
305 		return 6;
306 
307 	case 96000:
308 	case 88200:
309 		return 7;
310 
311 	case 48000:
312 	case 44100:
313 		return 0;
314 
315 	case 32000:
316 	case 33075:
317 		return 1;
318 
319 	case 24000:
320 	case 22050:
321 		return 2;
322 
323 	case 16000:
324 	case 14700:
325 		return 3;
326 
327 	case 12000:
328 	case 11025:
329 		return 4;
330 
331 	case 8000:
332 	case 7350:
333 		return 5;
334 
335 	default:
336 		return -EINVAL;
337 	}
338 }
339 
340 static int sun4i_codec_hw_params_capture(struct sun4i_codec *scodec,
341 					 struct snd_pcm_hw_params *params,
342 					 unsigned int hwrate)
343 {
344 	/* Set ADC sample rate */
345 	regmap_update_bits(scodec->regmap, SUN4I_CODEC_ADC_FIFOC,
346 			   7 << SUN4I_CODEC_ADC_FIFOC_ADC_FS,
347 			   hwrate << SUN4I_CODEC_ADC_FIFOC_ADC_FS);
348 
349 	/* Set the number of channels we want to use */
350 	if (params_channels(params) == 1)
351 		regmap_update_bits(scodec->regmap, SUN4I_CODEC_ADC_FIFOC,
352 				   BIT(SUN4I_CODEC_ADC_FIFOC_MONO_EN),
353 				   BIT(SUN4I_CODEC_ADC_FIFOC_MONO_EN));
354 	else
355 		regmap_update_bits(scodec->regmap, SUN4I_CODEC_ADC_FIFOC,
356 				   BIT(SUN4I_CODEC_ADC_FIFOC_MONO_EN), 0);
357 
358 	return 0;
359 }
360 
361 static int sun4i_codec_hw_params_playback(struct sun4i_codec *scodec,
362 					  struct snd_pcm_hw_params *params,
363 					  unsigned int hwrate)
364 {
365 	u32 val;
366 
367 	/* Set DAC sample rate */
368 	regmap_update_bits(scodec->regmap, SUN4I_CODEC_DAC_FIFOC,
369 			   7 << SUN4I_CODEC_DAC_FIFOC_DAC_FS,
370 			   hwrate << SUN4I_CODEC_DAC_FIFOC_DAC_FS);
371 
372 	/* Set the number of channels we want to use */
373 	if (params_channels(params) == 1)
374 		val = BIT(SUN4I_CODEC_DAC_FIFOC_MONO_EN);
375 	else
376 		val = 0;
377 
378 	regmap_update_bits(scodec->regmap, SUN4I_CODEC_DAC_FIFOC,
379 			   BIT(SUN4I_CODEC_DAC_FIFOC_MONO_EN),
380 			   val);
381 
382 	/* Set the number of sample bits to either 16 or 24 bits */
383 	if (hw_param_interval(params, SNDRV_PCM_HW_PARAM_SAMPLE_BITS)->min == 32) {
384 		regmap_update_bits(scodec->regmap, SUN4I_CODEC_DAC_FIFOC,
385 				   BIT(SUN4I_CODEC_DAC_FIFOC_TX_SAMPLE_BITS),
386 				   BIT(SUN4I_CODEC_DAC_FIFOC_TX_SAMPLE_BITS));
387 
388 		/* Set TX FIFO mode to padding the LSBs with 0 */
389 		regmap_update_bits(scodec->regmap, SUN4I_CODEC_DAC_FIFOC,
390 				   BIT(SUN4I_CODEC_DAC_FIFOC_TX_FIFO_MODE),
391 				   0);
392 
393 		scodec->playback_dma_data.addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
394 	} else {
395 		regmap_update_bits(scodec->regmap, SUN4I_CODEC_DAC_FIFOC,
396 				   BIT(SUN4I_CODEC_DAC_FIFOC_TX_SAMPLE_BITS),
397 				   0);
398 
399 		/* Set TX FIFO mode to repeat the MSB */
400 		regmap_update_bits(scodec->regmap, SUN4I_CODEC_DAC_FIFOC,
401 				   BIT(SUN4I_CODEC_DAC_FIFOC_TX_FIFO_MODE),
402 				   BIT(SUN4I_CODEC_DAC_FIFOC_TX_FIFO_MODE));
403 
404 		scodec->playback_dma_data.addr_width = DMA_SLAVE_BUSWIDTH_2_BYTES;
405 	}
406 
407 	return 0;
408 }
409 
410 static int sun4i_codec_hw_params(struct snd_pcm_substream *substream,
411 				 struct snd_pcm_hw_params *params,
412 				 struct snd_soc_dai *dai)
413 {
414 	struct snd_soc_pcm_runtime *rtd = substream->private_data;
415 	struct sun4i_codec *scodec = snd_soc_card_get_drvdata(rtd->card);
416 	unsigned long clk_freq;
417 	int ret, hwrate;
418 
419 	clk_freq = sun4i_codec_get_mod_freq(params);
420 	if (!clk_freq)
421 		return -EINVAL;
422 
423 	ret = clk_set_rate(scodec->clk_module, clk_freq);
424 	if (ret)
425 		return ret;
426 
427 	hwrate = sun4i_codec_get_hw_rate(params);
428 	if (hwrate < 0)
429 		return hwrate;
430 
431 	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
432 		return sun4i_codec_hw_params_playback(scodec, params,
433 						      hwrate);
434 
435 	return sun4i_codec_hw_params_capture(scodec, params,
436 					     hwrate);
437 }
438 
439 static int sun4i_codec_startup(struct snd_pcm_substream *substream,
440 			       struct snd_soc_dai *dai)
441 {
442 	struct snd_soc_pcm_runtime *rtd = substream->private_data;
443 	struct sun4i_codec *scodec = snd_soc_card_get_drvdata(rtd->card);
444 
445 	/*
446 	 * Stop issuing DRQ when we have room for less than 16 samples
447 	 * in our TX FIFO
448 	 */
449 	regmap_update_bits(scodec->regmap, SUN4I_CODEC_DAC_FIFOC,
450 			   3 << SUN4I_CODEC_DAC_FIFOC_DRQ_CLR_CNT,
451 			   3 << SUN4I_CODEC_DAC_FIFOC_DRQ_CLR_CNT);
452 
453 	return clk_prepare_enable(scodec->clk_module);
454 }
455 
456 static void sun4i_codec_shutdown(struct snd_pcm_substream *substream,
457 				 struct snd_soc_dai *dai)
458 {
459 	struct snd_soc_pcm_runtime *rtd = substream->private_data;
460 	struct sun4i_codec *scodec = snd_soc_card_get_drvdata(rtd->card);
461 
462 	clk_disable_unprepare(scodec->clk_module);
463 }
464 
465 static const struct snd_soc_dai_ops sun4i_codec_dai_ops = {
466 	.startup	= sun4i_codec_startup,
467 	.shutdown	= sun4i_codec_shutdown,
468 	.trigger	= sun4i_codec_trigger,
469 	.hw_params	= sun4i_codec_hw_params,
470 	.prepare	= sun4i_codec_prepare,
471 };
472 
473 static struct snd_soc_dai_driver sun4i_codec_dai = {
474 	.name	= "Codec",
475 	.ops	= &sun4i_codec_dai_ops,
476 	.playback = {
477 		.stream_name	= "Codec Playback",
478 		.channels_min	= 1,
479 		.channels_max	= 2,
480 		.rate_min	= 8000,
481 		.rate_max	= 192000,
482 		.rates		= SNDRV_PCM_RATE_8000_48000 |
483 				  SNDRV_PCM_RATE_96000 |
484 				  SNDRV_PCM_RATE_192000,
485 		.formats	= SNDRV_PCM_FMTBIT_S16_LE |
486 				  SNDRV_PCM_FMTBIT_S32_LE,
487 		.sig_bits	= 24,
488 	},
489 	.capture = {
490 		.stream_name	= "Codec Capture",
491 		.channels_min	= 1,
492 		.channels_max	= 2,
493 		.rate_min	= 8000,
494 		.rate_max	= 192000,
495 		.rates		= SNDRV_PCM_RATE_8000_48000 |
496 				  SNDRV_PCM_RATE_96000 |
497 				  SNDRV_PCM_RATE_192000 |
498 				  SNDRV_PCM_RATE_KNOT,
499 		.formats	= SNDRV_PCM_FMTBIT_S16_LE |
500 				  SNDRV_PCM_FMTBIT_S32_LE,
501 		.sig_bits	= 24,
502 	},
503 };
504 
505 /*** Codec ***/
506 static const struct snd_kcontrol_new sun4i_codec_pa_mute =
507 	SOC_DAPM_SINGLE("Switch", SUN4I_CODEC_DAC_ACTL,
508 			SUN4I_CODEC_DAC_ACTL_PA_MUTE, 1, 0);
509 
510 static DECLARE_TLV_DB_SCALE(sun4i_codec_pa_volume_scale, -6300, 100, 1);
511 
512 static const struct snd_kcontrol_new sun4i_codec_widgets[] = {
513 	SOC_SINGLE_TLV("Power Amplifier Volume", SUN4I_CODEC_DAC_ACTL,
514 		       SUN4I_CODEC_DAC_ACTL_PA_VOL, 0x3F, 0,
515 		       sun4i_codec_pa_volume_scale),
516 };
517 
518 static const struct snd_kcontrol_new sun4i_codec_left_mixer_controls[] = {
519 	SOC_DAPM_SINGLE("Left DAC Playback Switch", SUN4I_CODEC_DAC_ACTL,
520 			SUN4I_CODEC_DAC_ACTL_LDACLMIXS, 1, 0),
521 };
522 
523 static const struct snd_kcontrol_new sun4i_codec_right_mixer_controls[] = {
524 	SOC_DAPM_SINGLE("Right DAC Playback Switch", SUN4I_CODEC_DAC_ACTL,
525 			SUN4I_CODEC_DAC_ACTL_RDACRMIXS, 1, 0),
526 	SOC_DAPM_SINGLE("Left DAC Playback Switch", SUN4I_CODEC_DAC_ACTL,
527 			SUN4I_CODEC_DAC_ACTL_LDACRMIXS, 1, 0),
528 };
529 
530 static const struct snd_kcontrol_new sun4i_codec_pa_mixer_controls[] = {
531 	SOC_DAPM_SINGLE("DAC Playback Switch", SUN4I_CODEC_DAC_ACTL,
532 			SUN4I_CODEC_DAC_ACTL_DACPAS, 1, 0),
533 	SOC_DAPM_SINGLE("Mixer Playback Switch", SUN4I_CODEC_DAC_ACTL,
534 			SUN4I_CODEC_DAC_ACTL_MIXPAS, 1, 0),
535 };
536 
537 static const struct snd_soc_dapm_widget sun4i_codec_codec_dapm_widgets[] = {
538 	/* Digital parts of the ADCs */
539 	SND_SOC_DAPM_SUPPLY("ADC", SUN4I_CODEC_ADC_FIFOC,
540 			    SUN4I_CODEC_ADC_FIFOC_EN_AD, 0,
541 			    NULL, 0),
542 
543 	/* Digital parts of the DACs */
544 	SND_SOC_DAPM_SUPPLY("DAC", SUN4I_CODEC_DAC_DPC,
545 			    SUN4I_CODEC_DAC_DPC_EN_DA, 0,
546 			    NULL, 0),
547 
548 	/* Analog parts of the ADCs */
549 	SND_SOC_DAPM_ADC("Left ADC", "Codec Capture", SUN4I_CODEC_ADC_ACTL,
550 			 SUN4I_CODEC_ADC_ACTL_ADC_L_EN, 0),
551 	SND_SOC_DAPM_ADC("Right ADC", "Codec Capture", SUN4I_CODEC_ADC_ACTL,
552 			 SUN4I_CODEC_ADC_ACTL_ADC_R_EN, 0),
553 
554 	/* Analog parts of the DACs */
555 	SND_SOC_DAPM_DAC("Left DAC", "Codec Playback", SUN4I_CODEC_DAC_ACTL,
556 			 SUN4I_CODEC_DAC_ACTL_DACAENL, 0),
557 	SND_SOC_DAPM_DAC("Right DAC", "Codec Playback", SUN4I_CODEC_DAC_ACTL,
558 			 SUN4I_CODEC_DAC_ACTL_DACAENR, 0),
559 
560 	/* Mixers */
561 	SND_SOC_DAPM_MIXER("Left Mixer", SND_SOC_NOPM, 0, 0,
562 			   sun4i_codec_left_mixer_controls,
563 			   ARRAY_SIZE(sun4i_codec_left_mixer_controls)),
564 	SND_SOC_DAPM_MIXER("Right Mixer", SND_SOC_NOPM, 0, 0,
565 			   sun4i_codec_right_mixer_controls,
566 			   ARRAY_SIZE(sun4i_codec_right_mixer_controls)),
567 
568 	/* Global Mixer Enable */
569 	SND_SOC_DAPM_SUPPLY("Mixer Enable", SUN4I_CODEC_DAC_ACTL,
570 			    SUN4I_CODEC_DAC_ACTL_MIXEN, 0, NULL, 0),
571 
572 	/* VMIC */
573 	SND_SOC_DAPM_SUPPLY("VMIC", SUN4I_CODEC_ADC_ACTL,
574 			    SUN4I_CODEC_ADC_ACTL_VMICEN, 0, NULL, 0),
575 
576 	/* Mic Pre-Amplifiers */
577 	SND_SOC_DAPM_PGA("MIC1 Pre-Amplifier", SUN4I_CODEC_ADC_ACTL,
578 			 SUN4I_CODEC_ADC_ACTL_PREG1EN, 0, NULL, 0),
579 
580 	/* Power Amplifier */
581 	SND_SOC_DAPM_MIXER("Power Amplifier", SUN4I_CODEC_ADC_ACTL,
582 			   SUN4I_CODEC_ADC_ACTL_PA_EN, 0,
583 			   sun4i_codec_pa_mixer_controls,
584 			   ARRAY_SIZE(sun4i_codec_pa_mixer_controls)),
585 	SND_SOC_DAPM_SWITCH("Power Amplifier Mute", SND_SOC_NOPM, 0, 0,
586 			    &sun4i_codec_pa_mute),
587 
588 	SND_SOC_DAPM_INPUT("Mic1"),
589 
590 	SND_SOC_DAPM_OUTPUT("HP Right"),
591 	SND_SOC_DAPM_OUTPUT("HP Left"),
592 };
593 
594 static const struct snd_soc_dapm_route sun4i_codec_codec_dapm_routes[] = {
595 	/* Left ADC / DAC Routes */
596 	{ "Left ADC", NULL, "ADC" },
597 	{ "Left DAC", NULL, "DAC" },
598 
599 	/* Right ADC / DAC Routes */
600 	{ "Right ADC", NULL, "ADC" },
601 	{ "Right DAC", NULL, "DAC" },
602 
603 	/* Right Mixer Routes */
604 	{ "Right Mixer", NULL, "Mixer Enable" },
605 	{ "Right Mixer", "Left DAC Playback Switch", "Left DAC" },
606 	{ "Right Mixer", "Right DAC Playback Switch", "Right DAC" },
607 
608 	/* Left Mixer Routes */
609 	{ "Left Mixer", NULL, "Mixer Enable" },
610 	{ "Left Mixer", "Left DAC Playback Switch", "Left DAC" },
611 
612 	/* Power Amplifier Routes */
613 	{ "Power Amplifier", "Mixer Playback Switch", "Left Mixer" },
614 	{ "Power Amplifier", "Mixer Playback Switch", "Right Mixer" },
615 	{ "Power Amplifier", "DAC Playback Switch", "Left DAC" },
616 	{ "Power Amplifier", "DAC Playback Switch", "Right DAC" },
617 
618 	/* Headphone Output Routes */
619 	{ "Power Amplifier Mute", "Switch", "Power Amplifier" },
620 	{ "HP Right", NULL, "Power Amplifier Mute" },
621 	{ "HP Left", NULL, "Power Amplifier Mute" },
622 
623 	/* Mic1 Routes */
624 	{ "Left ADC", NULL, "MIC1 Pre-Amplifier" },
625 	{ "Right ADC", NULL, "MIC1 Pre-Amplifier" },
626 	{ "MIC1 Pre-Amplifier", NULL, "Mic1"},
627 	{ "Mic1", NULL, "VMIC" },
628 };
629 
630 static struct snd_soc_codec_driver sun4i_codec_codec = {
631 	.controls		= sun4i_codec_widgets,
632 	.num_controls		= ARRAY_SIZE(sun4i_codec_widgets),
633 	.dapm_widgets		= sun4i_codec_codec_dapm_widgets,
634 	.num_dapm_widgets	= ARRAY_SIZE(sun4i_codec_codec_dapm_widgets),
635 	.dapm_routes		= sun4i_codec_codec_dapm_routes,
636 	.num_dapm_routes	= ARRAY_SIZE(sun4i_codec_codec_dapm_routes),
637 };
638 
639 static const struct snd_soc_component_driver sun4i_codec_component = {
640 	.name = "sun4i-codec",
641 };
642 
643 #define SUN4I_CODEC_RATES	SNDRV_PCM_RATE_8000_192000
644 #define SUN4I_CODEC_FORMATS	(SNDRV_PCM_FMTBIT_S16_LE | \
645 				 SNDRV_PCM_FMTBIT_S32_LE)
646 
647 static int sun4i_codec_dai_probe(struct snd_soc_dai *dai)
648 {
649 	struct snd_soc_card *card = snd_soc_dai_get_drvdata(dai);
650 	struct sun4i_codec *scodec = snd_soc_card_get_drvdata(card);
651 
652 	snd_soc_dai_init_dma_data(dai, &scodec->playback_dma_data,
653 				  &scodec->capture_dma_data);
654 
655 	return 0;
656 }
657 
658 static struct snd_soc_dai_driver dummy_cpu_dai = {
659 	.name	= "sun4i-codec-cpu-dai",
660 	.probe	= sun4i_codec_dai_probe,
661 	.playback = {
662 		.stream_name	= "Playback",
663 		.channels_min	= 1,
664 		.channels_max	= 2,
665 		.rates		= SUN4I_CODEC_RATES,
666 		.formats	= SUN4I_CODEC_FORMATS,
667 		.sig_bits	= 24,
668 	},
669 	.capture = {
670 		.stream_name	= "Capture",
671 		.channels_min	= 1,
672 		.channels_max	= 2,
673 		.rates 		= SUN4I_CODEC_RATES,
674 		.formats 	= SUN4I_CODEC_FORMATS,
675 		.sig_bits	= 24,
676 	 },
677 };
678 
679 static const struct regmap_config sun4i_codec_regmap_config = {
680 	.reg_bits	= 32,
681 	.reg_stride	= 4,
682 	.val_bits	= 32,
683 	.max_register	= SUN4I_CODEC_AC_MIC_PHONE_CAL,
684 };
685 
686 static const struct of_device_id sun4i_codec_of_match[] = {
687 	{ .compatible = "allwinner,sun4i-a10-codec" },
688 	{ .compatible = "allwinner,sun7i-a20-codec" },
689 	{}
690 };
691 MODULE_DEVICE_TABLE(of, sun4i_codec_of_match);
692 
693 static struct snd_soc_dai_link *sun4i_codec_create_link(struct device *dev,
694 							int *num_links)
695 {
696 	struct snd_soc_dai_link *link = devm_kzalloc(dev, sizeof(*link),
697 						     GFP_KERNEL);
698 	if (!link)
699 		return NULL;
700 
701 	link->name		= "cdc";
702 	link->stream_name	= "CDC PCM";
703 	link->codec_dai_name	= "Codec";
704 	link->cpu_dai_name	= dev_name(dev);
705 	link->codec_name	= dev_name(dev);
706 	link->platform_name	= dev_name(dev);
707 	link->dai_fmt		= SND_SOC_DAIFMT_I2S;
708 
709 	*num_links = 1;
710 
711 	return link;
712 };
713 
714 static int sun4i_codec_spk_event(struct snd_soc_dapm_widget *w,
715 				 struct snd_kcontrol *k, int event)
716 {
717 	struct sun4i_codec *scodec = snd_soc_card_get_drvdata(w->dapm->card);
718 
719 	if (scodec->gpio_pa)
720 		gpiod_set_value_cansleep(scodec->gpio_pa,
721 					 !!SND_SOC_DAPM_EVENT_ON(event));
722 
723 	return 0;
724 }
725 
726 static const struct snd_soc_dapm_widget sun4i_codec_card_dapm_widgets[] = {
727 	SND_SOC_DAPM_SPK("Speaker", sun4i_codec_spk_event),
728 };
729 
730 static const struct snd_soc_dapm_route sun4i_codec_card_dapm_routes[] = {
731 	{ "Speaker", NULL, "HP Right" },
732 	{ "Speaker", NULL, "HP Left" },
733 };
734 
735 static struct snd_soc_card *sun4i_codec_create_card(struct device *dev)
736 {
737 	struct snd_soc_card *card;
738 
739 	card = devm_kzalloc(dev, sizeof(*card), GFP_KERNEL);
740 	if (!card)
741 		return NULL;
742 
743 	card->dai_link = sun4i_codec_create_link(dev, &card->num_links);
744 	if (!card->dai_link)
745 		return NULL;
746 
747 	card->dev		= dev;
748 	card->name		= "sun4i-codec";
749 	card->dapm_widgets	= sun4i_codec_card_dapm_widgets;
750 	card->num_dapm_widgets	= ARRAY_SIZE(sun4i_codec_card_dapm_widgets);
751 	card->dapm_routes	= sun4i_codec_card_dapm_routes;
752 	card->num_dapm_routes	= ARRAY_SIZE(sun4i_codec_card_dapm_routes);
753 
754 	return card;
755 };
756 
757 static int sun4i_codec_probe(struct platform_device *pdev)
758 {
759 	struct snd_soc_card *card;
760 	struct sun4i_codec *scodec;
761 	struct resource *res;
762 	void __iomem *base;
763 	int ret;
764 
765 	scodec = devm_kzalloc(&pdev->dev, sizeof(*scodec), GFP_KERNEL);
766 	if (!scodec)
767 		return -ENOMEM;
768 
769 	scodec->dev = &pdev->dev;
770 
771 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
772 	base = devm_ioremap_resource(&pdev->dev, res);
773 	if (IS_ERR(base)) {
774 		dev_err(&pdev->dev, "Failed to map the registers\n");
775 		return PTR_ERR(base);
776 	}
777 
778 	scodec->regmap = devm_regmap_init_mmio(&pdev->dev, base,
779 					     &sun4i_codec_regmap_config);
780 	if (IS_ERR(scodec->regmap)) {
781 		dev_err(&pdev->dev, "Failed to create our regmap\n");
782 		return PTR_ERR(scodec->regmap);
783 	}
784 
785 	/* Get the clocks from the DT */
786 	scodec->clk_apb = devm_clk_get(&pdev->dev, "apb");
787 	if (IS_ERR(scodec->clk_apb)) {
788 		dev_err(&pdev->dev, "Failed to get the APB clock\n");
789 		return PTR_ERR(scodec->clk_apb);
790 	}
791 
792 	scodec->clk_module = devm_clk_get(&pdev->dev, "codec");
793 	if (IS_ERR(scodec->clk_module)) {
794 		dev_err(&pdev->dev, "Failed to get the module clock\n");
795 		return PTR_ERR(scodec->clk_module);
796 	}
797 
798 	/* Enable the bus clock */
799 	if (clk_prepare_enable(scodec->clk_apb)) {
800 		dev_err(&pdev->dev, "Failed to enable the APB clock\n");
801 		return -EINVAL;
802 	}
803 
804 	scodec->gpio_pa = devm_gpiod_get_optional(&pdev->dev, "allwinner,pa",
805 						  GPIOD_OUT_LOW);
806 	if (IS_ERR(scodec->gpio_pa)) {
807 		ret = PTR_ERR(scodec->gpio_pa);
808 		if (ret != -EPROBE_DEFER)
809 			dev_err(&pdev->dev, "Failed to get pa gpio: %d\n", ret);
810 		return ret;
811 	}
812 
813 	/* DMA configuration for TX FIFO */
814 	scodec->playback_dma_data.addr = res->start + SUN4I_CODEC_DAC_TXDATA;
815 	scodec->playback_dma_data.maxburst = 4;
816 	scodec->playback_dma_data.addr_width = DMA_SLAVE_BUSWIDTH_2_BYTES;
817 
818 	/* DMA configuration for RX FIFO */
819 	scodec->capture_dma_data.addr = res->start + SUN4I_CODEC_ADC_RXDATA;
820 	scodec->capture_dma_data.maxburst = 4;
821 	scodec->capture_dma_data.addr_width = DMA_SLAVE_BUSWIDTH_2_BYTES;
822 
823 	ret = snd_soc_register_codec(&pdev->dev, &sun4i_codec_codec,
824 				     &sun4i_codec_dai, 1);
825 	if (ret) {
826 		dev_err(&pdev->dev, "Failed to register our codec\n");
827 		goto err_clk_disable;
828 	}
829 
830 	ret = devm_snd_soc_register_component(&pdev->dev,
831 					      &sun4i_codec_component,
832 					      &dummy_cpu_dai, 1);
833 	if (ret) {
834 		dev_err(&pdev->dev, "Failed to register our DAI\n");
835 		goto err_unregister_codec;
836 	}
837 
838 	ret = devm_snd_dmaengine_pcm_register(&pdev->dev, NULL, 0);
839 	if (ret) {
840 		dev_err(&pdev->dev, "Failed to register against DMAEngine\n");
841 		goto err_unregister_codec;
842 	}
843 
844 	card = sun4i_codec_create_card(&pdev->dev);
845 	if (!card) {
846 		dev_err(&pdev->dev, "Failed to create our card\n");
847 		goto err_unregister_codec;
848 	}
849 
850 	platform_set_drvdata(pdev, card);
851 	snd_soc_card_set_drvdata(card, scodec);
852 
853 	ret = snd_soc_register_card(card);
854 	if (ret) {
855 		dev_err(&pdev->dev, "Failed to register our card\n");
856 		goto err_unregister_codec;
857 	}
858 
859 	return 0;
860 
861 err_unregister_codec:
862 	snd_soc_unregister_codec(&pdev->dev);
863 err_clk_disable:
864 	clk_disable_unprepare(scodec->clk_apb);
865 	return ret;
866 }
867 
868 static int sun4i_codec_remove(struct platform_device *pdev)
869 {
870 	struct snd_soc_card *card = platform_get_drvdata(pdev);
871 	struct sun4i_codec *scodec = snd_soc_card_get_drvdata(card);
872 
873 	snd_soc_unregister_card(card);
874 	snd_soc_unregister_codec(&pdev->dev);
875 	clk_disable_unprepare(scodec->clk_apb);
876 
877 	return 0;
878 }
879 
880 static struct platform_driver sun4i_codec_driver = {
881 	.driver = {
882 		.name = "sun4i-codec",
883 		.of_match_table = sun4i_codec_of_match,
884 	},
885 	.probe = sun4i_codec_probe,
886 	.remove = sun4i_codec_remove,
887 };
888 module_platform_driver(sun4i_codec_driver);
889 
890 MODULE_DESCRIPTION("Allwinner A10 codec driver");
891 MODULE_AUTHOR("Emilio López <emilio@elopez.com.ar>");
892 MODULE_AUTHOR("Jon Smirl <jonsmirl@gmail.com>");
893 MODULE_AUTHOR("Maxime Ripard <maxime.ripard@free-electrons.com>");
894 MODULE_LICENSE("GPL");
895