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Linux/sound/soc/ti/davinci-evm.c

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  1 // SPDX-License-Identifier: GPL-2.0-only
  2 /*
  3  * ASoC driver for TI DAVINCI EVM platform
  4  *
  5  * Author:      Vladimir Barinov, <vbarinov@embeddedalley.com>
  6  * Copyright:   (C) 2007 MontaVista Software, Inc., <source@mvista.com>
  7  */
  8 
  9 #include <linux/module.h>
 10 #include <linux/moduleparam.h>
 11 #include <linux/timer.h>
 12 #include <linux/interrupt.h>
 13 #include <linux/platform_device.h>
 14 #include <linux/i2c.h>
 15 #include <linux/of_platform.h>
 16 #include <linux/clk.h>
 17 #include <sound/core.h>
 18 #include <sound/pcm.h>
 19 #include <sound/soc.h>
 20 
 21 #include <asm/dma.h>
 22 #include <asm/mach-types.h>
 23 
 24 struct snd_soc_card_drvdata_davinci {
 25         struct clk *mclk;
 26         unsigned sysclk;
 27 };
 28 
 29 static int evm_startup(struct snd_pcm_substream *substream)
 30 {
 31         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 32         struct snd_soc_card *soc_card = rtd->card;
 33         struct snd_soc_card_drvdata_davinci *drvdata =
 34                 snd_soc_card_get_drvdata(soc_card);
 35 
 36         if (drvdata->mclk)
 37                 return clk_prepare_enable(drvdata->mclk);
 38 
 39         return 0;
 40 }
 41 
 42 static void evm_shutdown(struct snd_pcm_substream *substream)
 43 {
 44         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 45         struct snd_soc_card *soc_card = rtd->card;
 46         struct snd_soc_card_drvdata_davinci *drvdata =
 47                 snd_soc_card_get_drvdata(soc_card);
 48 
 49         if (drvdata->mclk)
 50                 clk_disable_unprepare(drvdata->mclk);
 51 }
 52 
 53 static int evm_hw_params(struct snd_pcm_substream *substream,
 54                          struct snd_pcm_hw_params *params)
 55 {
 56         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 57         struct snd_soc_dai *codec_dai = rtd->codec_dai;
 58         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 59         struct snd_soc_card *soc_card = rtd->card;
 60         int ret = 0;
 61         unsigned sysclk = ((struct snd_soc_card_drvdata_davinci *)
 62                            snd_soc_card_get_drvdata(soc_card))->sysclk;
 63 
 64         /* set the codec system clock */
 65         ret = snd_soc_dai_set_sysclk(codec_dai, 0, sysclk, SND_SOC_CLOCK_OUT);
 66         if (ret < 0)
 67                 return ret;
 68 
 69         /* set the CPU system clock */
 70         ret = snd_soc_dai_set_sysclk(cpu_dai, 0, sysclk, SND_SOC_CLOCK_OUT);
 71         if (ret < 0)
 72                 return ret;
 73 
 74         return 0;
 75 }
 76 
 77 static struct snd_soc_ops evm_ops = {
 78         .startup = evm_startup,
 79         .shutdown = evm_shutdown,
 80         .hw_params = evm_hw_params,
 81 };
 82 
 83 /* davinci-evm machine dapm widgets */
 84 static const struct snd_soc_dapm_widget aic3x_dapm_widgets[] = {
 85         SND_SOC_DAPM_HP("Headphone Jack", NULL),
 86         SND_SOC_DAPM_LINE("Line Out", NULL),
 87         SND_SOC_DAPM_MIC("Mic Jack", NULL),
 88         SND_SOC_DAPM_LINE("Line In", NULL),
 89 };
 90 
 91 /* davinci-evm machine audio_mapnections to the codec pins */
 92 static const struct snd_soc_dapm_route audio_map[] = {
 93         /* Headphone connected to HPLOUT, HPROUT */
 94         {"Headphone Jack", NULL, "HPLOUT"},
 95         {"Headphone Jack", NULL, "HPROUT"},
 96 
 97         /* Line Out connected to LLOUT, RLOUT */
 98         {"Line Out", NULL, "LLOUT"},
 99         {"Line Out", NULL, "RLOUT"},
100 
101         /* Mic connected to (MIC3L | MIC3R) */
102         {"MIC3L", NULL, "Mic Bias"},
103         {"MIC3R", NULL, "Mic Bias"},
104         {"Mic Bias", NULL, "Mic Jack"},
105 
106         /* Line In connected to (LINE1L | LINE2L), (LINE1R | LINE2R) */
107         {"LINE1L", NULL, "Line In"},
108         {"LINE2L", NULL, "Line In"},
109         {"LINE1R", NULL, "Line In"},
110         {"LINE2R", NULL, "Line In"},
111 };
112 
113 /* Logic for a aic3x as connected on a davinci-evm */
114 static int evm_aic3x_init(struct snd_soc_pcm_runtime *rtd)
115 {
116         struct snd_soc_card *card = rtd->card;
117         struct device_node *np = card->dev->of_node;
118         int ret;
119 
120         /* Add davinci-evm specific widgets */
121         snd_soc_dapm_new_controls(&card->dapm, aic3x_dapm_widgets,
122                                   ARRAY_SIZE(aic3x_dapm_widgets));
123 
124         if (np) {
125                 ret = snd_soc_of_parse_audio_routing(card, "ti,audio-routing");
126                 if (ret)
127                         return ret;
128         } else {
129                 /* Set up davinci-evm specific audio path audio_map */
130                 snd_soc_dapm_add_routes(&card->dapm, audio_map,
131                                         ARRAY_SIZE(audio_map));
132         }
133 
134         /* not connected */
135         snd_soc_dapm_nc_pin(&card->dapm, "MONO_LOUT");
136         snd_soc_dapm_nc_pin(&card->dapm, "HPLCOM");
137         snd_soc_dapm_nc_pin(&card->dapm, "HPRCOM");
138 
139         return 0;
140 }
141 
142 /* davinci-evm digital audio interface glue - connects codec <--> CPU */
143 SND_SOC_DAILINK_DEFS(dm6446,
144         DAILINK_COMP_ARRAY(COMP_CPU("davinci-mcbsp")),
145         DAILINK_COMP_ARRAY(COMP_CODEC("tlv320aic3x-codec.1-001b",
146                                       "tlv320aic3x-hifi")),
147         DAILINK_COMP_ARRAY(COMP_PLATFORM("davinci-mcbsp")));
148 
149 static struct snd_soc_dai_link dm6446_evm_dai = {
150         .name = "TLV320AIC3X",
151         .stream_name = "AIC3X",
152         .init = evm_aic3x_init,
153         .ops = &evm_ops,
154         .dai_fmt = SND_SOC_DAIFMT_DSP_B | SND_SOC_DAIFMT_CBM_CFM |
155                    SND_SOC_DAIFMT_IB_NF,
156         SND_SOC_DAILINK_REG(dm6446),
157 };
158 
159 SND_SOC_DAILINK_DEFS(dm355,
160         DAILINK_COMP_ARRAY(COMP_CPU("davinci-mcbsp.1")),
161         DAILINK_COMP_ARRAY(COMP_CODEC("tlv320aic3x-codec.1-001b",
162                                       "tlv320aic3x-hifi")),
163         DAILINK_COMP_ARRAY(COMP_PLATFORM("davinci-mcbsp.1")));
164 
165 static struct snd_soc_dai_link dm355_evm_dai = {
166         .name = "TLV320AIC3X",
167         .stream_name = "AIC3X",
168         .init = evm_aic3x_init,
169         .ops = &evm_ops,
170         .dai_fmt = SND_SOC_DAIFMT_DSP_B | SND_SOC_DAIFMT_CBM_CFM |
171                    SND_SOC_DAIFMT_IB_NF,
172         SND_SOC_DAILINK_REG(dm355),
173 };
174 
175 #ifdef CONFIG_SND_SOC_DM365_AIC3X_CODEC
176 SND_SOC_DAILINK_DEFS(dm365,
177         DAILINK_COMP_ARRAY(COMP_CPU("davinci-mcbsp")),
178         DAILINK_COMP_ARRAY(COMP_CODEC("tlv320aic3x-codec.1-0018",
179                                       "tlv320aic3x-hifi")),
180         DAILINK_COMP_ARRAY(COMP_PLATFORM("davinci-mcbsp")));
181 #elif defined(CONFIG_SND_SOC_DM365_VOICE_CODEC)
182 SND_SOC_DAILINK_DEFS(dm365,
183         DAILINK_COMP_ARRAY(COMP_CPU("davinci-vcif")),
184         DAILINK_COMP_ARRAY(COMP_CODEC("cq93vc-codec", "cq93vc-hifi")),
185         DAILINK_COMP_ARRAY(COMP_PLATFORM("davinci-vcif")));
186 #endif
187 
188 static struct snd_soc_dai_link dm365_evm_dai = {
189 #ifdef CONFIG_SND_SOC_DM365_AIC3X_CODEC
190         .name = "TLV320AIC3X",
191         .stream_name = "AIC3X",
192         .init = evm_aic3x_init,
193         .ops = &evm_ops,
194         .dai_fmt = SND_SOC_DAIFMT_DSP_B | SND_SOC_DAIFMT_CBM_CFM |
195                    SND_SOC_DAIFMT_IB_NF,
196         SND_SOC_DAILINK_REG(dm365),
197 #elif defined(CONFIG_SND_SOC_DM365_VOICE_CODEC)
198         .name = "Voice Codec - CQ93VC",
199         .stream_name = "CQ93",
200         SND_SOC_DAILINK_REG(dm365),
201 #endif
202 };
203 
204 SND_SOC_DAILINK_DEFS(dm6467_aic3x,
205         DAILINK_COMP_ARRAY(COMP_CPU("davinci-mcasp.0")),
206         DAILINK_COMP_ARRAY(COMP_CODEC("tlv320aic3x-codec.0-001a",
207                                       "tlv320aic3x-hifi")),
208         DAILINK_COMP_ARRAY(COMP_PLATFORM("davinci-mcasp.0")));
209 
210 SND_SOC_DAILINK_DEFS(dm6467_spdif,
211         DAILINK_COMP_ARRAY(COMP_CPU("davinci-mcasp.1")),
212         DAILINK_COMP_ARRAY(COMP_CODEC("spdif_dit", "dit-hifi")),
213         DAILINK_COMP_ARRAY(COMP_PLATFORM("davinci-mcasp.1")));
214 
215 static struct snd_soc_dai_link dm6467_evm_dai[] = {
216         {
217                 .name = "TLV320AIC3X",
218                 .stream_name = "AIC3X",
219                 .init = evm_aic3x_init,
220                 .ops = &evm_ops,
221                 .dai_fmt = SND_SOC_DAIFMT_DSP_B | SND_SOC_DAIFMT_CBM_CFM |
222                            SND_SOC_DAIFMT_IB_NF,
223                 SND_SOC_DAILINK_REG(dm6467_aic3x),
224         },
225         {
226                 .name = "McASP",
227                 .stream_name = "spdif",
228                 .dai_fmt = SND_SOC_DAIFMT_DSP_B | SND_SOC_DAIFMT_CBM_CFM |
229                            SND_SOC_DAIFMT_IB_NF,
230                 SND_SOC_DAILINK_REG(dm6467_spdif),
231         },
232 };
233 
234 SND_SOC_DAILINK_DEFS(da830,
235         DAILINK_COMP_ARRAY(COMP_CPU("davinci-mcasp.1")),
236         DAILINK_COMP_ARRAY(COMP_CODEC("tlv320aic3x-codec.1-0018",
237                                       "tlv320aic3x-hifi")),
238         DAILINK_COMP_ARRAY(COMP_PLATFORM("davinci-mcasp.1")));
239 
240 static struct snd_soc_dai_link da830_evm_dai = {
241         .name = "TLV320AIC3X",
242         .stream_name = "AIC3X",
243         .init = evm_aic3x_init,
244         .ops = &evm_ops,
245         .dai_fmt = SND_SOC_DAIFMT_DSP_B | SND_SOC_DAIFMT_CBM_CFM |
246                    SND_SOC_DAIFMT_IB_NF,
247         SND_SOC_DAILINK_REG(da830),
248 };
249 
250 SND_SOC_DAILINK_DEFS(da850,
251         DAILINK_COMP_ARRAY(COMP_CPU("davinci-mcasp.0")),
252         DAILINK_COMP_ARRAY(COMP_CODEC("tlv320aic3x-codec.1-0018",
253                                       "tlv320aic3x-hifi")),
254         DAILINK_COMP_ARRAY(COMP_PLATFORM("davinci-mcasp.0")));
255 
256 static struct snd_soc_dai_link da850_evm_dai = {
257         .name = "TLV320AIC3X",
258         .stream_name = "AIC3X",
259         .init = evm_aic3x_init,
260         .ops = &evm_ops,
261         .dai_fmt = SND_SOC_DAIFMT_DSP_B | SND_SOC_DAIFMT_CBM_CFM |
262                    SND_SOC_DAIFMT_IB_NF,
263         SND_SOC_DAILINK_REG(da850),
264 };
265 
266 /* davinci dm6446 evm audio machine driver */
267 /*
268  * ASP0 in DM6446 EVM is clocked by U55, as configured by
269  * board-dm644x-evm.c using GPIOs from U18.  There are six
270  * options; here we "know" we use a 48 KHz sample rate.
271  */
272 static struct snd_soc_card_drvdata_davinci dm6446_snd_soc_card_drvdata = {
273         .sysclk = 12288000,
274 };
275 
276 static struct snd_soc_card dm6446_snd_soc_card_evm = {
277         .name = "DaVinci DM6446 EVM",
278         .owner = THIS_MODULE,
279         .dai_link = &dm6446_evm_dai,
280         .num_links = 1,
281         .drvdata = &dm6446_snd_soc_card_drvdata,
282 };
283 
284 /* davinci dm355 evm audio machine driver */
285 /* ASP1 on DM355 EVM is clocked by an external oscillator */
286 static struct snd_soc_card_drvdata_davinci dm355_snd_soc_card_drvdata = {
287         .sysclk = 27000000,
288 };
289 
290 static struct snd_soc_card dm355_snd_soc_card_evm = {
291         .name = "DaVinci DM355 EVM",
292         .owner = THIS_MODULE,
293         .dai_link = &dm355_evm_dai,
294         .num_links = 1,
295         .drvdata = &dm355_snd_soc_card_drvdata,
296 };
297 
298 /* davinci dm365 evm audio machine driver */
299 static struct snd_soc_card_drvdata_davinci dm365_snd_soc_card_drvdata = {
300         .sysclk = 27000000,
301 };
302 
303 static struct snd_soc_card dm365_snd_soc_card_evm = {
304         .name = "DaVinci DM365 EVM",
305         .owner = THIS_MODULE,
306         .dai_link = &dm365_evm_dai,
307         .num_links = 1,
308         .drvdata = &dm365_snd_soc_card_drvdata,
309 };
310 
311 /* davinci dm6467 evm audio machine driver */
312 static struct snd_soc_card_drvdata_davinci dm6467_snd_soc_card_drvdata = {
313         .sysclk = 27000000,
314 };
315 
316 static struct snd_soc_card dm6467_snd_soc_card_evm = {
317         .name = "DaVinci DM6467 EVM",
318         .owner = THIS_MODULE,
319         .dai_link = dm6467_evm_dai,
320         .num_links = ARRAY_SIZE(dm6467_evm_dai),
321         .drvdata = &dm6467_snd_soc_card_drvdata,
322 };
323 
324 static struct snd_soc_card_drvdata_davinci da830_snd_soc_card_drvdata = {
325         .sysclk = 24576000,
326 };
327 
328 static struct snd_soc_card da830_snd_soc_card = {
329         .name = "DA830/OMAP-L137 EVM",
330         .owner = THIS_MODULE,
331         .dai_link = &da830_evm_dai,
332         .num_links = 1,
333         .drvdata = &da830_snd_soc_card_drvdata,
334 };
335 
336 static struct snd_soc_card_drvdata_davinci da850_snd_soc_card_drvdata = {
337         .sysclk = 24576000,
338 };
339 
340 static struct snd_soc_card da850_snd_soc_card = {
341         .name = "DA850/OMAP-L138 EVM",
342         .owner = THIS_MODULE,
343         .dai_link = &da850_evm_dai,
344         .num_links = 1,
345         .drvdata = &da850_snd_soc_card_drvdata,
346 };
347 
348 #if defined(CONFIG_OF)
349 
350 /*
351  * The struct is used as place holder. It will be completely
352  * filled with data from dt node.
353  */
354 SND_SOC_DAILINK_DEFS(evm,
355         DAILINK_COMP_ARRAY(COMP_EMPTY()),
356         DAILINK_COMP_ARRAY(COMP_CODEC(NULL, "tlv320aic3x-hifi")),
357         DAILINK_COMP_ARRAY(COMP_EMPTY()));
358 
359 static struct snd_soc_dai_link evm_dai_tlv320aic3x = {
360         .name           = "TLV320AIC3X",
361         .stream_name    = "AIC3X",
362         .ops            = &evm_ops,
363         .init           = evm_aic3x_init,
364         .dai_fmt = SND_SOC_DAIFMT_DSP_B | SND_SOC_DAIFMT_CBM_CFM |
365                    SND_SOC_DAIFMT_IB_NF,
366         SND_SOC_DAILINK_REG(evm),
367 };
368 
369 static const struct of_device_id davinci_evm_dt_ids[] = {
370         {
371                 .compatible = "ti,da830-evm-audio",
372                 .data = (void *) &evm_dai_tlv320aic3x,
373         },
374         { /* sentinel */ }
375 };
376 MODULE_DEVICE_TABLE(of, davinci_evm_dt_ids);
377 
378 /* davinci evm audio machine driver */
379 static struct snd_soc_card evm_soc_card = {
380         .owner = THIS_MODULE,
381         .num_links = 1,
382 };
383 
384 static int davinci_evm_probe(struct platform_device *pdev)
385 {
386         struct device_node *np = pdev->dev.of_node;
387         const struct of_device_id *match;
388         struct snd_soc_dai_link *dai;
389         struct snd_soc_card_drvdata_davinci *drvdata = NULL;
390         struct clk *mclk;
391         int ret = 0;
392 
393         match = of_match_device(of_match_ptr(davinci_evm_dt_ids), &pdev->dev);
394         if (!match) {
395                 dev_err(&pdev->dev, "Error: No device match found\n");
396                 return -ENODEV;
397         }
398 
399         dai = (struct snd_soc_dai_link *) match->data;
400 
401         evm_soc_card.dai_link = dai;
402 
403         dai->codecs->of_node = of_parse_phandle(np, "ti,audio-codec", 0);
404         if (!dai->codecs->of_node)
405                 return -EINVAL;
406 
407         dai->cpus->of_node = of_parse_phandle(np, "ti,mcasp-controller", 0);
408         if (!dai->cpus->of_node)
409                 return -EINVAL;
410 
411         dai->platforms->of_node = dai->cpus->of_node;
412 
413         evm_soc_card.dev = &pdev->dev;
414         ret = snd_soc_of_parse_card_name(&evm_soc_card, "ti,model");
415         if (ret)
416                 return ret;
417 
418         mclk = devm_clk_get(&pdev->dev, "mclk");
419         if (PTR_ERR(mclk) == -EPROBE_DEFER) {
420                 return -EPROBE_DEFER;
421         } else if (IS_ERR(mclk)) {
422                 dev_dbg(&pdev->dev, "mclk not found.\n");
423                 mclk = NULL;
424         }
425 
426         drvdata = devm_kzalloc(&pdev->dev, sizeof(*drvdata), GFP_KERNEL);
427         if (!drvdata)
428                 return -ENOMEM;
429 
430         drvdata->mclk = mclk;
431 
432         ret = of_property_read_u32(np, "ti,codec-clock-rate", &drvdata->sysclk);
433 
434         if (ret < 0) {
435                 if (!drvdata->mclk) {
436                         dev_err(&pdev->dev,
437                                 "No clock or clock rate defined.\n");
438                         return -EINVAL;
439                 }
440                 drvdata->sysclk = clk_get_rate(drvdata->mclk);
441         } else if (drvdata->mclk) {
442                 unsigned int requestd_rate = drvdata->sysclk;
443                 clk_set_rate(drvdata->mclk, drvdata->sysclk);
444                 drvdata->sysclk = clk_get_rate(drvdata->mclk);
445                 if (drvdata->sysclk != requestd_rate)
446                         dev_warn(&pdev->dev,
447                                  "Could not get requested rate %u using %u.\n",
448                                  requestd_rate, drvdata->sysclk);
449         }
450 
451         snd_soc_card_set_drvdata(&evm_soc_card, drvdata);
452         ret = devm_snd_soc_register_card(&pdev->dev, &evm_soc_card);
453 
454         if (ret)
455                 dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n", ret);
456 
457         return ret;
458 }
459 
460 static struct platform_driver davinci_evm_driver = {
461         .probe          = davinci_evm_probe,
462         .driver         = {
463                 .name   = "davinci_evm",
464                 .pm     = &snd_soc_pm_ops,
465                 .of_match_table = of_match_ptr(davinci_evm_dt_ids),
466         },
467 };
468 #endif
469 
470 static struct platform_device *evm_snd_device;
471 
472 static int __init evm_init(void)
473 {
474         struct snd_soc_card *evm_snd_dev_data;
475         int index;
476         int ret;
477 
478         /*
479          * If dtb is there, the devices will be created dynamically.
480          * Only register platfrom driver structure.
481          */
482 #if defined(CONFIG_OF)
483         if (of_have_populated_dt())
484                 return platform_driver_register(&davinci_evm_driver);
485 #endif
486 
487         if (machine_is_davinci_evm()) {
488                 evm_snd_dev_data = &dm6446_snd_soc_card_evm;
489                 index = 0;
490         } else if (machine_is_davinci_dm355_evm()) {
491                 evm_snd_dev_data = &dm355_snd_soc_card_evm;
492                 index = 1;
493         } else if (machine_is_davinci_dm365_evm()) {
494                 evm_snd_dev_data = &dm365_snd_soc_card_evm;
495                 index = 0;
496         } else if (machine_is_davinci_dm6467_evm()) {
497                 evm_snd_dev_data = &dm6467_snd_soc_card_evm;
498                 index = 0;
499         } else if (machine_is_davinci_da830_evm()) {
500                 evm_snd_dev_data = &da830_snd_soc_card;
501                 index = 1;
502         } else if (machine_is_davinci_da850_evm()) {
503                 evm_snd_dev_data = &da850_snd_soc_card;
504                 index = 0;
505         } else
506                 return -EINVAL;
507 
508         evm_snd_device = platform_device_alloc("soc-audio", index);
509         if (!evm_snd_device)
510                 return -ENOMEM;
511 
512         platform_set_drvdata(evm_snd_device, evm_snd_dev_data);
513         ret = platform_device_add(evm_snd_device);
514         if (ret)
515                 platform_device_put(evm_snd_device);
516 
517         return ret;
518 }
519 
520 static void __exit evm_exit(void)
521 {
522 #if defined(CONFIG_OF)
523         if (of_have_populated_dt()) {
524                 platform_driver_unregister(&davinci_evm_driver);
525                 return;
526         }
527 #endif
528 
529         platform_device_unregister(evm_snd_device);
530 }
531 
532 module_init(evm_init);
533 module_exit(evm_exit);
534 
535 MODULE_AUTHOR("Vladimir Barinov");
536 MODULE_DESCRIPTION("TI DAVINCI EVM ASoC driver");
537 MODULE_LICENSE("GPL");
538 

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