sound/soc/bcm/hifiberry_dacplusadc.c

   1 /*
   2  * ASoC Driver for HiFiBerry DAC+ / DAC Pro with ADC
   3  *
   4  * Author:      Daniel Matuschek, Stuart MacLean <stuart@hifiberry.com>
   5  *              Copyright 2014-2015
   6  *              based on code by Florian Meier <florian.meier@koalo.de>
   7  *              ADC added by Joerg Schambacher <joscha@schambacher.com>
   8  *              Copyright 2018
   9  *
  10  * This program is free software; you can redistribute it and/or
  11  * modify it under the terms of the GNU General Public License
  12  * version 2 as published by the Free Software Foundation.
  13  *
  14  * This program is distributed in the hope that it will be useful, but
  15  * WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  17  * General Public License for more details.
  18  */
  19
  20 #include <linux/module.h>
  21 #include <linux/platform_device.h>
  22 #include <linux/kernel.h>
  23 #include <linux/clk.h>
  24 #include <linux/kernel.h>
  25 #include <linux/module.h>
  26 #include <linux/of.h>
  27 #include <linux/slab.h>
  28 #include <linux/delay.h>
  29
  30 #include <sound/core.h>
  31 #include <sound/pcm.h>
  32 #include <sound/pcm_params.h>
  33 #include <sound/soc.h>
  34 #include <sound/jack.h>
  35
  36 #include "../codecs/pcm512x.h"
  37
  38 #define HIFIBERRY_DACPRO_NOCLOCK 0
  39 #define HIFIBERRY_DACPRO_CLK44EN 1
  40 #define HIFIBERRY_DACPRO_CLK48EN 2
  41
  42 struct platform_device *dmic_codec_dev;
  43
  44 struct pcm512x_priv {
  45         struct regmap *regmap;
  46         struct clk *sclk;
  47 };
  48
  49 /* Clock rate of CLK44EN attached to GPIO6 pin */
  50 #define CLK_44EN_RATE 22579200UL
  51 /* Clock rate of CLK48EN attached to GPIO3 pin */
  52 #define CLK_48EN_RATE 24576000UL
  53
  54 static bool slave;
  55 static bool snd_rpi_hifiberry_is_dacpro;
  56 static bool digital_gain_0db_limit = true;
  57 static bool leds_off;
  58
  59 static void snd_rpi_hifiberry_dacplusadc_select_clk(struct snd_soc_component *component,
  60         int clk_id)
  61 {
  62         switch (clk_id) {
  63         case HIFIBERRY_DACPRO_NOCLOCK:
  64                 snd_soc_component_update_bits(component, PCM512x_GPIO_CONTROL_1, 0x24, 0x00);
  65                 break;
  66         case HIFIBERRY_DACPRO_CLK44EN:
  67                 snd_soc_component_update_bits(component, PCM512x_GPIO_CONTROL_1, 0x24, 0x20);
  68                 break;
  69         case HIFIBERRY_DACPRO_CLK48EN:
  70                 snd_soc_component_update_bits(component, PCM512x_GPIO_CONTROL_1, 0x24, 0x04);
  71                 break;
  72         }
  73 }
  74
  75 static void snd_rpi_hifiberry_dacplusadc_clk_gpio(struct snd_soc_component *component)
  76 {
  77         snd_soc_component_update_bits(component, PCM512x_GPIO_EN, 0x24, 0x24);
  78         snd_soc_component_update_bits(component, PCM512x_GPIO_OUTPUT_3, 0x0f, 0x02);
  79         snd_soc_component_update_bits(component, PCM512x_GPIO_OUTPUT_6, 0x0f, 0x02);
  80 }
  81
  82 static bool snd_rpi_hifiberry_dacplusadc_is_sclk(struct snd_soc_component *component)
  83 {
  84         unsigned int sck;
  85
  86         sck = snd_soc_component_read(component, PCM512x_RATE_DET_4);
  87         return (!(sck & 0x40));
  88 }
  89
  90 static bool snd_rpi_hifiberry_dacplusadc_is_sclk_sleep(
  91         struct snd_soc_component *component)
  92 {
  93         msleep(2);
  94         return snd_rpi_hifiberry_dacplusadc_is_sclk(component);
  95 }
  96
  97 static bool snd_rpi_hifiberry_dacplusadc_is_pro_card(struct snd_soc_component *component)
  98 {
  99         bool isClk44EN, isClk48En, isNoClk;
 100
 101         snd_rpi_hifiberry_dacplusadc_clk_gpio(component);
 102
 103         snd_rpi_hifiberry_dacplusadc_select_clk(component, HIFIBERRY_DACPRO_CLK44EN);
 104         isClk44EN = snd_rpi_hifiberry_dacplusadc_is_sclk_sleep(component);
 105
 106         snd_rpi_hifiberry_dacplusadc_select_clk(component, HIFIBERRY_DACPRO_NOCLOCK);
 107         isNoClk = snd_rpi_hifiberry_dacplusadc_is_sclk_sleep(component);
 108
 109         snd_rpi_hifiberry_dacplusadc_select_clk(component, HIFIBERRY_DACPRO_CLK48EN);
 110         isClk48En = snd_rpi_hifiberry_dacplusadc_is_sclk_sleep(component);
 111
 112         return (isClk44EN && isClk48En && !isNoClk);
 113 }
 114
 115 static int snd_rpi_hifiberry_dacplusadc_clk_for_rate(int sample_rate)
 116 {
 117         int type;
 118
 119         switch (sample_rate) {
 120         case 11025:
 121         case 22050:
 122         case 44100:
 123         case 88200:
 124         case 176400:
 125         case 352800:
 126                 type = HIFIBERRY_DACPRO_CLK44EN;
 127                 break;
 128         default:
 129                 type = HIFIBERRY_DACPRO_CLK48EN;
 130                 break;
 131         }
 132         return type;
 133 }
 134
 135 static void snd_rpi_hifiberry_dacplusadc_set_sclk(struct snd_soc_component *component,
 136         int sample_rate)
 137 {
 138         struct pcm512x_priv *pcm512x = snd_soc_component_get_drvdata(component);
 139
 140         if (!IS_ERR(pcm512x->sclk)) {
 141                 int ctype;
 142
 143                 ctype = snd_rpi_hifiberry_dacplusadc_clk_for_rate(sample_rate);
 144                 clk_set_rate(pcm512x->sclk, (ctype == HIFIBERRY_DACPRO_CLK44EN)
 145                         ? CLK_44EN_RATE : CLK_48EN_RATE);
 146                 snd_rpi_hifiberry_dacplusadc_select_clk(component, ctype);
 147         }
 148 }
 149
 150 static int snd_rpi_hifiberry_dacplusadc_init(struct snd_soc_pcm_runtime *rtd)
 151 {
 152         struct snd_soc_component *component = asoc_rtd_to_codec(rtd, 0)->component;
 153         struct pcm512x_priv *priv;
 154
 155         if (slave)
 156                 snd_rpi_hifiberry_is_dacpro = false;
 157         else
 158                 snd_rpi_hifiberry_is_dacpro =
 159                                 snd_rpi_hifiberry_dacplusadc_is_pro_card(component);
 160
 161         if (snd_rpi_hifiberry_is_dacpro) {
 162                 struct snd_soc_dai_link *dai = rtd->dai_link;
 163
 164                 dai->name = "HiFiBerry ADCDAC+ Pro";
 165                 dai->stream_name = "HiFiBerry ADCDAC+ Pro HiFi";
 166                 dai->dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF
 167                         | SND_SOC_DAIFMT_CBM_CFM;
 168
 169                 snd_soc_component_update_bits(component, PCM512x_BCLK_LRCLK_CFG, 0x31, 0x11);
 170                 snd_soc_component_update_bits(component, PCM512x_MASTER_MODE, 0x03, 0x03);
 171                 snd_soc_component_update_bits(component, PCM512x_MASTER_CLKDIV_2, 0x7f, 63);
 172         } else {
 173                 priv = snd_soc_component_get_drvdata(component);
 174                 priv->sclk = ERR_PTR(-ENOENT);
 175         }
 176
 177         snd_soc_component_update_bits(component, PCM512x_GPIO_EN, 0x08, 0x08);
 178         snd_soc_component_update_bits(component, PCM512x_GPIO_OUTPUT_4, 0x0f, 0x02);
 179         if (leds_off)
 180                 snd_soc_component_update_bits(component, PCM512x_GPIO_CONTROL_1, 0x08, 0x00);
 181         else
 182                 snd_soc_component_update_bits(component, PCM512x_GPIO_CONTROL_1, 0x08, 0x08);
 183
 184         if (digital_gain_0db_limit) {
 185                 int ret;
 186                 struct snd_soc_card *card = rtd->card;
 187
 188                 ret = snd_soc_limit_volume(card, "Digital Playback Volume", 207);
 189                 if (ret < 0)
 190                         dev_warn(card->dev, "Failed to set volume limit: %d\n", ret);
 191         }
 192
 193         return 0;
 194 }
 195
 196 static int snd_rpi_hifiberry_dacplusadc_update_rate_den(
 197         struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params)
 198 {
 199         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 200         struct snd_soc_component *component = asoc_rtd_to_codec(rtd, 0)->component;
 201         struct pcm512x_priv *pcm512x = snd_soc_component_get_drvdata(component);
 202         struct snd_ratnum *rats_no_pll;
 203         unsigned int num = 0, den = 0;
 204         int err;
 205
 206         rats_no_pll = devm_kzalloc(rtd->dev, sizeof(*rats_no_pll), GFP_KERNEL);
 207         if (!rats_no_pll)
 208                 return -ENOMEM;
 209
 210         rats_no_pll->num = clk_get_rate(pcm512x->sclk) / 64;
 211         rats_no_pll->den_min = 1;
 212         rats_no_pll->den_max = 128;
 213         rats_no_pll->den_step = 1;
 214
 215         err = snd_interval_ratnum(hw_param_interval(params,
 216                 SNDRV_PCM_HW_PARAM_RATE), 1, rats_no_pll, &num, &den);
 217         if (err >= 0 && den) {
 218                 params->rate_num = num;
 219                 params->rate_den = den;
 220         }
 221
 222         devm_kfree(rtd->dev, rats_no_pll);
 223         return 0;
 224 }
 225
 226 static int snd_rpi_hifiberry_dacplusadc_hw_params(
 227         struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params)
 228 {
 229         int ret = 0;
 230         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 231         int channels = params_channels(params);
 232         int width = 32;
 233
 234         if (snd_rpi_hifiberry_is_dacpro) {
 235                 struct snd_soc_component *component = asoc_rtd_to_codec(rtd, 0)->component;
 236
 237                 width = snd_pcm_format_physical_width(params_format(params));
 238
 239                 snd_rpi_hifiberry_dacplusadc_set_sclk(component,
 240                         params_rate(params));
 241
 242                 ret = snd_rpi_hifiberry_dacplusadc_update_rate_den(
 243                         substream, params);
 244         }
 245
 246         ret = snd_soc_dai_set_bclk_ratio(asoc_rtd_to_cpu(rtd, 0), channels * width);
 247         if (ret)
 248                 return ret;
 249         ret = snd_soc_dai_set_bclk_ratio(asoc_rtd_to_codec(rtd, 0), channels * width);
 250         return ret;
 251 }
 252
 253 static int hifiberry_dacplusadc_LED_cnt;
 254
 255 static int snd_rpi_hifiberry_dacplusadc_startup(
 256         struct snd_pcm_substream *substream)
 257 {
 258         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 259         struct snd_soc_component *component = asoc_rtd_to_codec(rtd, 0)->component;
 260
 261         if (leds_off)
 262                 return 0;
 263         snd_soc_component_update_bits(component, PCM512x_GPIO_CONTROL_1,
 264                                          0x08, 0x08);
 265         hifiberry_dacplusadc_LED_cnt++;
 266         return 0;
 267 }
 268
 269 static void snd_rpi_hifiberry_dacplusadc_shutdown(
 270         struct snd_pcm_substream *substream)
 271 {
 272         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 273         struct snd_soc_component *component = asoc_rtd_to_codec(rtd, 0)->component;
 274
 275         hifiberry_dacplusadc_LED_cnt--;
 276         if (!hifiberry_dacplusadc_LED_cnt)
 277                 snd_soc_component_update_bits(component, PCM512x_GPIO_CONTROL_1,
 278                                                  0x08, 0x00);
 279 }
 280
 281 /* machine stream operations */
 282 static struct snd_soc_ops snd_rpi_hifiberry_dacplusadc_ops = {
 283         .hw_params = snd_rpi_hifiberry_dacplusadc_hw_params,
 284         .startup = snd_rpi_hifiberry_dacplusadc_startup,
 285         .shutdown = snd_rpi_hifiberry_dacplusadc_shutdown,
 286 };
 287
 288 SND_SOC_DAILINK_DEFS(hifi,
 289         DAILINK_COMP_ARRAY(COMP_CPU("bcm2708-i2s.0")),
 290         DAILINK_COMP_ARRAY(COMP_CODEC("pcm512x.1-004d", "pcm512x-hifi"),
 291                            COMP_CODEC("dmic-codec", "dmic-hifi")),
 292         DAILINK_COMP_ARRAY(COMP_PLATFORM("bcm2708-i2s.0")));
 293
 294 static struct snd_soc_dai_link snd_rpi_hifiberry_dacplusadc_dai[] = {
 295 {
 296         .name           = "HiFiBerry DAC+ADC",
 297         .stream_name    = "HiFiBerry DAC+ADC HiFi",
 298         .dai_fmt        = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
 299                                 SND_SOC_DAIFMT_CBS_CFS,
 300         .ops            = &snd_rpi_hifiberry_dacplusadc_ops,
 301         .init           = snd_rpi_hifiberry_dacplusadc_init,
 302         SND_SOC_DAILINK_REG(hifi),
 303 },
 304 };
 305
 306 /* audio machine driver */
 307 static struct snd_soc_card snd_rpi_hifiberry_dacplusadc = {
 308         .name         = "snd_rpi_hifiberry_dacplusadc",
 309         .driver_name  = "HifiberryDacpAdc",
 310         .owner        = THIS_MODULE,
 311         .dai_link     = snd_rpi_hifiberry_dacplusadc_dai,
 312         .num_links    = ARRAY_SIZE(snd_rpi_hifiberry_dacplusadc_dai),
 313 };
 314
 315
 316 static int snd_rpi_hifiberry_dacplusadc_probe(struct platform_device *pdev)
 317 {
 318         int ret = 0;
 319
 320         snd_rpi_hifiberry_dacplusadc.dev = &pdev->dev;
 321         if (pdev->dev.of_node) {
 322                 struct device_node *i2s_node;
 323                 struct snd_soc_dai_link *dai;
 324
 325                 dai = &snd_rpi_hifiberry_dacplusadc_dai[0];
 326                 i2s_node = of_parse_phandle(pdev->dev.of_node,
 327                         "i2s-controller", 0);
 328                 if (i2s_node) {
 329                         dai->cpus->of_node = i2s_node;
 330                         dai->platforms->of_node = i2s_node;
 331                         dai->cpus->dai_name = NULL;
 332                         dai->platforms->name = NULL;
 333                 }
 334         }
 335         digital_gain_0db_limit = !of_property_read_bool(
 336                 pdev->dev.of_node, "hifiberry,24db_digital_gain");
 337         slave = of_property_read_bool(pdev->dev.of_node,
 338                                         "hifiberry-dacplusadc,slave");
 339         leds_off = of_property_read_bool(pdev->dev.of_node,
 340                                         "hifiberry-dacplusadc,leds_off");
 341
 342         ret = devm_snd_soc_register_card(&pdev->dev,
 343                                                  &snd_rpi_hifiberry_dacplusadc);
 344         if (ret && ret != -EPROBE_DEFER)
 345                 dev_err(&pdev->dev,
 346                         "snd_soc_register_card() failed: %d\n", ret);
 347
 348         return ret;
 349 }
 350
 351 static const struct of_device_id snd_rpi_hifiberry_dacplusadc_of_match[] = {
 352         { .compatible = "hifiberry,hifiberry-dacplusadc", },
 353         {},
 354 };
 355
 356 MODULE_DEVICE_TABLE(of, snd_rpi_hifiberry_dacplusadc_of_match);
 357
 358 static struct platform_driver snd_rpi_hifiberry_dacplusadc_driver = {
 359         .driver = {
 360                 .name   = "snd-rpi-hifiberry-dacplusadc",
 361                 .owner  = THIS_MODULE,
 362                 .of_match_table = snd_rpi_hifiberry_dacplusadc_of_match,
 363         },
 364         .probe          = snd_rpi_hifiberry_dacplusadc_probe,
 365 };
 366
 367 static int __init hifiberry_dacplusadc_init(void)
 368 {
 369         int ret;
 370
 371         dmic_codec_dev = platform_device_register_simple("dmic-codec", -1, NULL,
 372                                                          0);
 373         if (IS_ERR(dmic_codec_dev)) {
 374                 pr_err("%s: dmic-codec device registration failed\n", __func__);
 375                 return PTR_ERR(dmic_codec_dev);
 376         }
 377
 378         ret = platform_driver_register(&snd_rpi_hifiberry_dacplusadc_driver);
 379         if (ret) {
 380                 pr_err("%s: platform driver registration failed\n", __func__);
 381                 platform_device_unregister(dmic_codec_dev);
 382         }
 383
 384         return ret;
 385 }
 386 module_init(hifiberry_dacplusadc_init);
 387
 388 static void __exit hifiberry_dacplusadc_exit(void)
 389 {
 390         platform_driver_unregister(&snd_rpi_hifiberry_dacplusadc_driver);
 391         platform_device_unregister(dmic_codec_dev);
 392 }
 393 module_exit(hifiberry_dacplusadc_exit);
 394
 395 MODULE_AUTHOR("Joerg Schambacher <joscha@schambacher.com>");
 396 MODULE_AUTHOR("Daniel Matuschek <daniel@hifiberry.com>");
 397 MODULE_DESCRIPTION("ASoC Driver for HiFiBerry DAC+ADC");
 398 MODULE_LICENSE("GPL v2");