linux/sound/soc/davinci/davinci-evm.c
<<
>>
Prefs
   1/*
   2 * ASoC driver for TI DAVINCI EVM platform
   3 *
   4 * Author:      Vladimir Barinov, <vbarinov@embeddedalley.com>
   5 * Copyright:   (C) 2007 MontaVista Software, Inc., <source@mvista.com>
   6 *
   7 * This program is free software; you can redistribute it and/or modify
   8 * it under the terms of the GNU General Public License version 2 as
   9 * published by the Free Software Foundation.
  10 */
  11
  12#include <linux/module.h>
  13#include <linux/moduleparam.h>
  14#include <linux/timer.h>
  15#include <linux/interrupt.h>
  16#include <linux/platform_device.h>
  17#include <linux/i2c.h>
  18#include <linux/of_platform.h>
  19#include <linux/clk.h>
  20#include <sound/core.h>
  21#include <sound/pcm.h>
  22#include <sound/soc.h>
  23
  24#include <asm/dma.h>
  25#include <asm/mach-types.h>
  26
  27struct snd_soc_card_drvdata_davinci {
  28        struct clk *mclk;
  29        unsigned sysclk;
  30};
  31
  32static int evm_startup(struct snd_pcm_substream *substream)
  33{
  34        struct snd_soc_pcm_runtime *rtd = substream->private_data;
  35        struct snd_soc_card *soc_card = rtd->card;
  36        struct snd_soc_card_drvdata_davinci *drvdata =
  37                snd_soc_card_get_drvdata(soc_card);
  38
  39        if (drvdata->mclk)
  40                return clk_prepare_enable(drvdata->mclk);
  41
  42        return 0;
  43}
  44
  45static void evm_shutdown(struct snd_pcm_substream *substream)
  46{
  47        struct snd_soc_pcm_runtime *rtd = substream->private_data;
  48        struct snd_soc_card *soc_card = rtd->card;
  49        struct snd_soc_card_drvdata_davinci *drvdata =
  50                snd_soc_card_get_drvdata(soc_card);
  51
  52        if (drvdata->mclk)
  53                clk_disable_unprepare(drvdata->mclk);
  54}
  55
  56static int evm_hw_params(struct snd_pcm_substream *substream,
  57                         struct snd_pcm_hw_params *params)
  58{
  59        struct snd_soc_pcm_runtime *rtd = substream->private_data;
  60        struct snd_soc_dai *codec_dai = rtd->codec_dai;
  61        struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
  62        struct snd_soc_card *soc_card = rtd->card;
  63        int ret = 0;
  64        unsigned sysclk = ((struct snd_soc_card_drvdata_davinci *)
  65                           snd_soc_card_get_drvdata(soc_card))->sysclk;
  66
  67        /* set the codec system clock */
  68        ret = snd_soc_dai_set_sysclk(codec_dai, 0, sysclk, SND_SOC_CLOCK_OUT);
  69        if (ret < 0)
  70                return ret;
  71
  72        /* set the CPU system clock */
  73        ret = snd_soc_dai_set_sysclk(cpu_dai, 0, sysclk, SND_SOC_CLOCK_OUT);
  74        if (ret < 0)
  75                return ret;
  76
  77        return 0;
  78}
  79
  80static struct snd_soc_ops evm_ops = {
  81        .startup = evm_startup,
  82        .shutdown = evm_shutdown,
  83        .hw_params = evm_hw_params,
  84};
  85
  86/* davinci-evm machine dapm widgets */
  87static const struct snd_soc_dapm_widget aic3x_dapm_widgets[] = {
  88        SND_SOC_DAPM_HP("Headphone Jack", NULL),
  89        SND_SOC_DAPM_LINE("Line Out", NULL),
  90        SND_SOC_DAPM_MIC("Mic Jack", NULL),
  91        SND_SOC_DAPM_LINE("Line In", NULL),
  92};
  93
  94/* davinci-evm machine audio_mapnections to the codec pins */
  95static const struct snd_soc_dapm_route audio_map[] = {
  96        /* Headphone connected to HPLOUT, HPROUT */
  97        {"Headphone Jack", NULL, "HPLOUT"},
  98        {"Headphone Jack", NULL, "HPROUT"},
  99
 100        /* Line Out connected to LLOUT, RLOUT */
 101        {"Line Out", NULL, "LLOUT"},
 102        {"Line Out", NULL, "RLOUT"},
 103
 104        /* Mic connected to (MIC3L | MIC3R) */
 105        {"MIC3L", NULL, "Mic Bias"},
 106        {"MIC3R", NULL, "Mic Bias"},
 107        {"Mic Bias", NULL, "Mic Jack"},
 108
 109        /* Line In connected to (LINE1L | LINE2L), (LINE1R | LINE2R) */
 110        {"LINE1L", NULL, "Line In"},
 111        {"LINE2L", NULL, "Line In"},
 112        {"LINE1R", NULL, "Line In"},
 113        {"LINE2R", NULL, "Line In"},
 114};
 115
 116/* Logic for a aic3x as connected on a davinci-evm */
 117static int evm_aic3x_init(struct snd_soc_pcm_runtime *rtd)
 118{
 119        struct snd_soc_card *card = rtd->card;
 120        struct device_node *np = card->dev->of_node;
 121        int ret;
 122
 123        /* Add davinci-evm specific widgets */
 124        snd_soc_dapm_new_controls(&card->dapm, aic3x_dapm_widgets,
 125                                  ARRAY_SIZE(aic3x_dapm_widgets));
 126
 127        if (np) {
 128                ret = snd_soc_of_parse_audio_routing(card, "ti,audio-routing");
 129                if (ret)
 130                        return ret;
 131        } else {
 132                /* Set up davinci-evm specific audio path audio_map */
 133                snd_soc_dapm_add_routes(&card->dapm, audio_map,
 134                                        ARRAY_SIZE(audio_map));
 135        }
 136
 137        /* not connected */
 138        snd_soc_dapm_nc_pin(&card->dapm, "MONO_LOUT");
 139        snd_soc_dapm_nc_pin(&card->dapm, "HPLCOM");
 140        snd_soc_dapm_nc_pin(&card->dapm, "HPRCOM");
 141
 142        return 0;
 143}
 144
 145/* davinci-evm digital audio interface glue - connects codec <--> CPU */
 146static struct snd_soc_dai_link dm6446_evm_dai = {
 147        .name = "TLV320AIC3X",
 148        .stream_name = "AIC3X",
 149        .cpu_dai_name = "davinci-mcbsp",
 150        .codec_dai_name = "tlv320aic3x-hifi",
 151        .codec_name = "tlv320aic3x-codec.1-001b",
 152        .platform_name = "davinci-mcbsp",
 153        .init = evm_aic3x_init,
 154        .ops = &evm_ops,
 155        .dai_fmt = SND_SOC_DAIFMT_DSP_B | SND_SOC_DAIFMT_CBM_CFM |
 156                   SND_SOC_DAIFMT_IB_NF,
 157};
 158
 159static struct snd_soc_dai_link dm355_evm_dai = {
 160        .name = "TLV320AIC3X",
 161        .stream_name = "AIC3X",
 162        .cpu_dai_name = "davinci-mcbsp.1",
 163        .codec_dai_name = "tlv320aic3x-hifi",
 164        .codec_name = "tlv320aic3x-codec.1-001b",
 165        .platform_name = "davinci-mcbsp.1",
 166        .init = evm_aic3x_init,
 167        .ops = &evm_ops,
 168        .dai_fmt = SND_SOC_DAIFMT_DSP_B | SND_SOC_DAIFMT_CBM_CFM |
 169                   SND_SOC_DAIFMT_IB_NF,
 170};
 171
 172static struct snd_soc_dai_link dm365_evm_dai = {
 173#ifdef CONFIG_SND_DM365_AIC3X_CODEC
 174        .name = "TLV320AIC3X",
 175        .stream_name = "AIC3X",
 176        .cpu_dai_name = "davinci-mcbsp",
 177        .codec_dai_name = "tlv320aic3x-hifi",
 178        .codec_name = "tlv320aic3x-codec.1-0018",
 179        .platform_name = "davinci-mcbsp",
 180        .init = evm_aic3x_init,
 181        .ops = &evm_ops,
 182        .dai_fmt = SND_SOC_DAIFMT_DSP_B | SND_SOC_DAIFMT_CBM_CFM |
 183                   SND_SOC_DAIFMT_IB_NF,
 184#elif defined(CONFIG_SND_DM365_VOICE_CODEC)
 185        .name = "Voice Codec - CQ93VC",
 186        .stream_name = "CQ93",
 187        .cpu_dai_name = "davinci-vcif",
 188        .codec_dai_name = "cq93vc-hifi",
 189        .codec_name = "cq93vc-codec",
 190        .platform_name = "davinci-vcif",
 191#endif
 192};
 193
 194static struct snd_soc_dai_link dm6467_evm_dai[] = {
 195        {
 196                .name = "TLV320AIC3X",
 197                .stream_name = "AIC3X",
 198                .cpu_dai_name= "davinci-mcasp.0",
 199                .codec_dai_name = "tlv320aic3x-hifi",
 200                .platform_name = "davinci-mcasp.0",
 201                .codec_name = "tlv320aic3x-codec.0-001a",
 202                .init = evm_aic3x_init,
 203                .ops = &evm_ops,
 204                .dai_fmt = SND_SOC_DAIFMT_DSP_B | SND_SOC_DAIFMT_CBM_CFM |
 205                           SND_SOC_DAIFMT_IB_NF,
 206        },
 207        {
 208                .name = "McASP",
 209                .stream_name = "spdif",
 210                .cpu_dai_name= "davinci-mcasp.1",
 211                .codec_dai_name = "dit-hifi",
 212                .codec_name = "spdif_dit",
 213                .platform_name = "davinci-mcasp.1",
 214                .dai_fmt = SND_SOC_DAIFMT_DSP_B | SND_SOC_DAIFMT_CBM_CFM |
 215                           SND_SOC_DAIFMT_IB_NF,
 216        },
 217};
 218
 219static struct snd_soc_dai_link da830_evm_dai = {
 220        .name = "TLV320AIC3X",
 221        .stream_name = "AIC3X",
 222        .cpu_dai_name = "davinci-mcasp.1",
 223        .codec_dai_name = "tlv320aic3x-hifi",
 224        .codec_name = "tlv320aic3x-codec.1-0018",
 225        .platform_name = "davinci-mcasp.1",
 226        .init = evm_aic3x_init,
 227        .ops = &evm_ops,
 228        .dai_fmt = SND_SOC_DAIFMT_DSP_B | SND_SOC_DAIFMT_CBM_CFM |
 229                   SND_SOC_DAIFMT_IB_NF,
 230};
 231
 232static struct snd_soc_dai_link da850_evm_dai = {
 233        .name = "TLV320AIC3X",
 234        .stream_name = "AIC3X",
 235        .cpu_dai_name= "davinci-mcasp.0",
 236        .codec_dai_name = "tlv320aic3x-hifi",
 237        .codec_name = "tlv320aic3x-codec.1-0018",
 238        .platform_name = "davinci-mcasp.0",
 239        .init = evm_aic3x_init,
 240        .ops = &evm_ops,
 241        .dai_fmt = SND_SOC_DAIFMT_DSP_B | SND_SOC_DAIFMT_CBM_CFM |
 242                   SND_SOC_DAIFMT_IB_NF,
 243};
 244
 245/* davinci dm6446 evm audio machine driver */
 246/*
 247 * ASP0 in DM6446 EVM is clocked by U55, as configured by
 248 * board-dm644x-evm.c using GPIOs from U18.  There are six
 249 * options; here we "know" we use a 48 KHz sample rate.
 250 */
 251static struct snd_soc_card_drvdata_davinci dm6446_snd_soc_card_drvdata = {
 252        .sysclk = 12288000,
 253};
 254
 255static struct snd_soc_card dm6446_snd_soc_card_evm = {
 256        .name = "DaVinci DM6446 EVM",
 257        .owner = THIS_MODULE,
 258        .dai_link = &dm6446_evm_dai,
 259        .num_links = 1,
 260        .drvdata = &dm6446_snd_soc_card_drvdata,
 261};
 262
 263/* davinci dm355 evm audio machine driver */
 264/* ASP1 on DM355 EVM is clocked by an external oscillator */
 265static struct snd_soc_card_drvdata_davinci dm355_snd_soc_card_drvdata = {
 266        .sysclk = 27000000,
 267};
 268
 269static struct snd_soc_card dm355_snd_soc_card_evm = {
 270        .name = "DaVinci DM355 EVM",
 271        .owner = THIS_MODULE,
 272        .dai_link = &dm355_evm_dai,
 273        .num_links = 1,
 274        .drvdata = &dm355_snd_soc_card_drvdata,
 275};
 276
 277/* davinci dm365 evm audio machine driver */
 278static struct snd_soc_card_drvdata_davinci dm365_snd_soc_card_drvdata = {
 279        .sysclk = 27000000,
 280};
 281
 282static struct snd_soc_card dm365_snd_soc_card_evm = {
 283        .name = "DaVinci DM365 EVM",
 284        .owner = THIS_MODULE,
 285        .dai_link = &dm365_evm_dai,
 286        .num_links = 1,
 287        .drvdata = &dm365_snd_soc_card_drvdata,
 288};
 289
 290/* davinci dm6467 evm audio machine driver */
 291static struct snd_soc_card_drvdata_davinci dm6467_snd_soc_card_drvdata = {
 292        .sysclk = 27000000,
 293};
 294
 295static struct snd_soc_card dm6467_snd_soc_card_evm = {
 296        .name = "DaVinci DM6467 EVM",
 297        .owner = THIS_MODULE,
 298        .dai_link = dm6467_evm_dai,
 299        .num_links = ARRAY_SIZE(dm6467_evm_dai),
 300        .drvdata = &dm6467_snd_soc_card_drvdata,
 301};
 302
 303static struct snd_soc_card_drvdata_davinci da830_snd_soc_card_drvdata = {
 304        .sysclk = 24576000,
 305};
 306
 307static struct snd_soc_card da830_snd_soc_card = {
 308        .name = "DA830/OMAP-L137 EVM",
 309        .owner = THIS_MODULE,
 310        .dai_link = &da830_evm_dai,
 311        .num_links = 1,
 312        .drvdata = &da830_snd_soc_card_drvdata,
 313};
 314
 315static struct snd_soc_card_drvdata_davinci da850_snd_soc_card_drvdata = {
 316        .sysclk = 24576000,
 317};
 318
 319static struct snd_soc_card da850_snd_soc_card = {
 320        .name = "DA850/OMAP-L138 EVM",
 321        .owner = THIS_MODULE,
 322        .dai_link = &da850_evm_dai,
 323        .num_links = 1,
 324        .drvdata = &da850_snd_soc_card_drvdata,
 325};
 326
 327#if defined(CONFIG_OF)
 328
 329/*
 330 * The struct is used as place holder. It will be completely
 331 * filled with data from dt node.
 332 */
 333static struct snd_soc_dai_link evm_dai_tlv320aic3x = {
 334        .name           = "TLV320AIC3X",
 335        .stream_name    = "AIC3X",
 336        .codec_dai_name = "tlv320aic3x-hifi",
 337        .ops            = &evm_ops,
 338        .init           = evm_aic3x_init,
 339        .dai_fmt = SND_SOC_DAIFMT_DSP_B | SND_SOC_DAIFMT_CBM_CFM |
 340                   SND_SOC_DAIFMT_IB_NF,
 341};
 342
 343static const struct of_device_id davinci_evm_dt_ids[] = {
 344        {
 345                .compatible = "ti,da830-evm-audio",
 346                .data = (void *) &evm_dai_tlv320aic3x,
 347        },
 348        { /* sentinel */ }
 349};
 350MODULE_DEVICE_TABLE(of, davinci_evm_dt_ids);
 351
 352/* davinci evm audio machine driver */
 353static struct snd_soc_card evm_soc_card = {
 354        .owner = THIS_MODULE,
 355        .num_links = 1,
 356};
 357
 358static int davinci_evm_probe(struct platform_device *pdev)
 359{
 360        struct device_node *np = pdev->dev.of_node;
 361        const struct of_device_id *match =
 362                of_match_device(of_match_ptr(davinci_evm_dt_ids), &pdev->dev);
 363        struct snd_soc_dai_link *dai = (struct snd_soc_dai_link *) match->data;
 364        struct snd_soc_card_drvdata_davinci *drvdata = NULL;
 365        struct clk *mclk;
 366        int ret = 0;
 367
 368        evm_soc_card.dai_link = dai;
 369
 370        dai->codec_of_node = of_parse_phandle(np, "ti,audio-codec", 0);
 371        if (!dai->codec_of_node)
 372                return -EINVAL;
 373
 374        dai->cpu_of_node = of_parse_phandle(np, "ti,mcasp-controller", 0);
 375        if (!dai->cpu_of_node)
 376                return -EINVAL;
 377
 378        dai->platform_of_node = dai->cpu_of_node;
 379
 380        evm_soc_card.dev = &pdev->dev;
 381        ret = snd_soc_of_parse_card_name(&evm_soc_card, "ti,model");
 382        if (ret)
 383                return ret;
 384
 385        mclk = devm_clk_get(&pdev->dev, "mclk");
 386        if (PTR_ERR(mclk) == -EPROBE_DEFER) {
 387                return -EPROBE_DEFER;
 388        } else if (IS_ERR(mclk)) {
 389                dev_dbg(&pdev->dev, "mclk not found.\n");
 390                mclk = NULL;
 391        }
 392
 393        drvdata = devm_kzalloc(&pdev->dev, sizeof(*drvdata), GFP_KERNEL);
 394        if (!drvdata)
 395                return -ENOMEM;
 396
 397        drvdata->mclk = mclk;
 398
 399        ret = of_property_read_u32(np, "ti,codec-clock-rate", &drvdata->sysclk);
 400
 401        if (ret < 0) {
 402                if (!drvdata->mclk) {
 403                        dev_err(&pdev->dev,
 404                                "No clock or clock rate defined.\n");
 405                        return -EINVAL;
 406                }
 407                drvdata->sysclk = clk_get_rate(drvdata->mclk);
 408        } else if (drvdata->mclk) {
 409                unsigned int requestd_rate = drvdata->sysclk;
 410                clk_set_rate(drvdata->mclk, drvdata->sysclk);
 411                drvdata->sysclk = clk_get_rate(drvdata->mclk);
 412                if (drvdata->sysclk != requestd_rate)
 413                        dev_warn(&pdev->dev,
 414                                 "Could not get requested rate %u using %u.\n",
 415                                 requestd_rate, drvdata->sysclk);
 416        }
 417
 418        snd_soc_card_set_drvdata(&evm_soc_card, drvdata);
 419        ret = devm_snd_soc_register_card(&pdev->dev, &evm_soc_card);
 420
 421        if (ret)
 422                dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n", ret);
 423
 424        return ret;
 425}
 426
 427static struct platform_driver davinci_evm_driver = {
 428        .probe          = davinci_evm_probe,
 429        .driver         = {
 430                .name   = "davinci_evm",
 431                .pm     = &snd_soc_pm_ops,
 432                .of_match_table = of_match_ptr(davinci_evm_dt_ids),
 433        },
 434};
 435#endif
 436
 437static struct platform_device *evm_snd_device;
 438
 439static int __init evm_init(void)
 440{
 441        struct snd_soc_card *evm_snd_dev_data;
 442        int index;
 443        int ret;
 444
 445        /*
 446         * If dtb is there, the devices will be created dynamically.
 447         * Only register platfrom driver structure.
 448         */
 449#if defined(CONFIG_OF)
 450        if (of_have_populated_dt())
 451                return platform_driver_register(&davinci_evm_driver);
 452#endif
 453
 454        if (machine_is_davinci_evm()) {
 455                evm_snd_dev_data = &dm6446_snd_soc_card_evm;
 456                index = 0;
 457        } else if (machine_is_davinci_dm355_evm()) {
 458                evm_snd_dev_data = &dm355_snd_soc_card_evm;
 459                index = 1;
 460        } else if (machine_is_davinci_dm365_evm()) {
 461                evm_snd_dev_data = &dm365_snd_soc_card_evm;
 462                index = 0;
 463        } else if (machine_is_davinci_dm6467_evm()) {
 464                evm_snd_dev_data = &dm6467_snd_soc_card_evm;
 465                index = 0;
 466        } else if (machine_is_davinci_da830_evm()) {
 467                evm_snd_dev_data = &da830_snd_soc_card;
 468                index = 1;
 469        } else if (machine_is_davinci_da850_evm()) {
 470                evm_snd_dev_data = &da850_snd_soc_card;
 471                index = 0;
 472        } else
 473                return -EINVAL;
 474
 475        evm_snd_device = platform_device_alloc("soc-audio", index);
 476        if (!evm_snd_device)
 477                return -ENOMEM;
 478
 479        platform_set_drvdata(evm_snd_device, evm_snd_dev_data);
 480        ret = platform_device_add(evm_snd_device);
 481        if (ret)
 482                platform_device_put(evm_snd_device);
 483
 484        return ret;
 485}
 486
 487static void __exit evm_exit(void)
 488{
 489#if defined(CONFIG_OF)
 490        if (of_have_populated_dt()) {
 491                platform_driver_unregister(&davinci_evm_driver);
 492                return;
 493        }
 494#endif
 495
 496        platform_device_unregister(evm_snd_device);
 497}
 498
 499module_init(evm_init);
 500module_exit(evm_exit);
 501
 502MODULE_AUTHOR("Vladimir Barinov");
 503MODULE_DESCRIPTION("TI DAVINCI EVM ASoC driver");
 504MODULE_LICENSE("GPL");
 505
lxr.linux.no kindly hosted by Redpill Linpro AS, provider of Linux consulting and operations services since 1995.