target/linux/brcm2708/patches-4.19/950-0780-Allow-simultaneous-use-of-JustBoom-DAC-and-Digi.patch

   1 From 8f11db84e124da59b8a717d66fc424ef070f4be0 Mon Sep 17 00:00:00 2001
   2 From: Johannes Krude <johannes@krude.de>
   3 Date: Sat, 16 Nov 2019 13:14:43 +0100
   4 Subject: [PATCH] Allow simultaneous use of JustBoom DAC and Digi
   5
   6 Signed-off-by: Johannes Krude <johannes@krude.de>
   7 ---
   8  arch/arm/boot/dts/overlays/Makefile           |   1 +
   9  arch/arm/boot/dts/overlays/README             |  20 ++
  10  .../dts/overlays/justboom-both-overlay.dts    |  65 +++++
  11  sound/soc/bcm/Kconfig                         |  12 +
  12  sound/soc/bcm/Makefile                        |   2 +
  13  sound/soc/bcm/justboom-both.c                 | 269 ++++++++++++++++++
  14  11 files changed, 374 insertions(+)
  15  create mode 100644 arch/arm/boot/dts/overlays/justboom-both-overlay.dts
  16  create mode 100644 sound/soc/bcm/justboom-both.c
  17
  18 --- a/arch/arm/boot/dts/overlays/Makefile
  19 +++ b/arch/arm/boot/dts/overlays/Makefile
  20 @@ -86,6 +86,7 @@ dtbo-$(CONFIG_ARCH_BCM2835) += \
  21         iqaudio-digi-wm8804-audio.dtbo \
  22         irs1125.dtbo \
  23         jedec-spi-nor.dtbo \
  24 +       justboom-both.dtbo \
  25         justboom-dac.dtbo \
  26         justboom-digi.dtbo \
  27         ltc294x.dtbo \
  28 --- a/arch/arm/boot/dts/overlays/README
  29 +++ b/arch/arm/boot/dts/overlays/README
  30 @@ -1388,6 +1388,26 @@ Params: flash-spi<n>-<m>        Enables
  31                                  on SPI<n>, CS#<m>.
  32
  33
  34 +Name:   justboom-both
  35 +Info:   Simultaneous usage of an justboom-dac and justboom-digi based
  36 +        card
  37 +Load:   dtoverlay=justboom-both,<param>=<val>
  38 +Params: 24db_digital_gain       Allow gain to be applied via the PCM512x codec
  39 +                                Digital volume control. Enable with
  40 +                                "dtoverlay=justboom-dac,24db_digital_gain"
  41 +                                (The default behaviour is that the Digital
  42 +                                volume control is limited to a maximum of
  43 +                                0dB. ie. it can attenuate but not provide
  44 +                                gain. For most users, this will be desired
  45 +                                as it will prevent clipping. By appending
  46 +                                the 24dB_digital_gain parameter, the Digital
  47 +                                volume control will allow up to 24dB of
  48 +                                gain. If this parameter is enabled, it is the
  49 +                                responsibility of the user to ensure that
  50 +                                the Digital volume control is set to a value
  51 +                                that does not result in clipping/distortion!)
  52 +
  53 +
  54  Name:   justboom-dac
  55  Info:   Configures the JustBoom DAC HAT, Amp HAT, DAC Zero and Amp Zero audio
  56          cards
  57 --- /dev/null
  58 +++ b/arch/arm/boot/dts/overlays/justboom-both-overlay.dts
  59 @@ -0,0 +1,65 @@
  60 +// SPDX-License-Identifier: GPL-2.0
  61 +// Definitions for JustBoom Both (Digi+DAC)
  62 +/dts-v1/;
  63 +/plugin/;
  64 +
  65 +/ {
  66 +       compatible = "brcm,bcm2835";
  67 +
  68 +       fragment@0 {
  69 +               target = <&i2s>;
  70 +               __overlay__ {
  71 +                       status = "okay";
  72 +               };
  73 +       };
  74 +
  75 +       fragment@1 {
  76 +               target = <&i2c1>;
  77 +               __overlay__ {
  78 +                       #address-cells = <1>;
  79 +                       #size-cells = <0>;
  80 +                       status = "okay";
  81 +
  82 +                       wm8804@3b {
  83 +                               #sound-dai-cells = <0>;
  84 +                               compatible = "wlf,wm8804";
  85 +                               reg = <0x3b>;
  86 +                               PVDD-supply = <&vdd_3v3_reg>;
  87 +                               DVDD-supply = <&vdd_3v3_reg>;
  88 +                               status = "okay";
  89 +                       };
  90 +               };
  91 +       };
  92 +
  93 +       fragment@2 {
  94 +               target = <&i2c1>;
  95 +               __overlay__ {
  96 +                       #address-cells = <1>;
  97 +                       #size-cells = <0>;
  98 +                       status = "okay";
  99 +
 100 +                       pcm5122@4d {
 101 +                               #sound-dai-cells = <0>;
 102 +                               compatible = "ti,pcm5122";
 103 +                               reg = <0x4d>;
 104 +                               AVDD-supply = <&vdd_3v3_reg>;
 105 +                               DVDD-supply = <&vdd_3v3_reg>;
 106 +                               CPVDD-supply = <&vdd_3v3_reg>;
 107 +                               status = "okay";
 108 +                       };
 109 +               };
 110 +       };
 111 +
 112 +       fragment@3 {
 113 +               target = <&sound>;
 114 +               frag3: __overlay__ {
 115 +                       compatible = "justboom,justboom-both";
 116 +                       i2s-controller = <&i2s>;
 117 +                       status = "okay";
 118 +               };
 119 +       };
 120 +
 121 +       __overrides__ {
 122 +               24db_digital_gain = <&frag3>,"justboom,24db_digital_gain?";
 123 +       };
 124 +};
 125 --- a/sound/soc/bcm/Kconfig
 126 +++ b/sound/soc/bcm/Kconfig
 127 @@ -102,6 +102,18 @@ config SND_BCM2708_SOC_RPI_PROTO
 128         help
 129           Say Y or M if you want to add support for Audio Codec Board PROTO (WM8731).
 130
 131 +config SND_BCM2708_SOC_JUSTBOOM_BOTH
 132 +       tristate "Support for simultaneous JustBoom Digi and JustBoom DAC"
 133 +       depends on SND_BCM2708_SOC_I2S || SND_BCM2835_SOC_I2S
 134 +       select SND_SOC_WM8804
 135 +       select SND_SOC_PCM512x
 136 +       help
 137 +               Say Y or M if you want to add support for simultaneous
 138 +               JustBoom Digi and JustBoom DAC.
 139 +
 140 +               This is not the right choice if you only have one but both of
 141 +               these cards.
 142 +
 143  config SND_BCM2708_SOC_JUSTBOOM_DAC
 144         tristate "Support for JustBoom DAC"
 145         depends on SND_BCM2708_SOC_I2S || SND_BCM2835_SOC_I2S
 146 --- a/sound/soc/bcm/Makefile
 147 +++ b/sound/soc/bcm/Makefile
 148 @@ -16,6 +16,7 @@ snd-soc-hifiberry-dacplus-objs := hifibe
 149  snd-soc-hifiberry-dacplusadc-objs := hifiberry_dacplusadc.o
 150  snd-soc-hifiberry-dacplusadcpro-objs := hifiberry_dacplusadcpro.o
 151  snd-soc-hifiberry-dacplusdsp-objs := hifiberry_dacplusdsp.o
 152 +snd-soc-justboom-both-objs := justboom-both.o
 153  snd-soc-justboom-dac-objs := justboom-dac.o
 154  snd-soc-rpi-cirrus-objs := rpi-cirrus.o
 155  snd-soc-rpi-proto-objs := rpi-proto.o
 156 @@ -42,6 +43,7 @@ obj-$(CONFIG_SND_BCM2708_SOC_HIFIBERRY_D
 157  obj-$(CONFIG_SND_BCM2708_SOC_HIFIBERRY_DACPLUSADC) += snd-soc-hifiberry-dacplusadc.o
 158  obj-$(CONFIG_SND_BCM2708_SOC_HIFIBERRY_DACPLUSADCPRO) += snd-soc-hifiberry-dacplusadcpro.o
 159  obj-$(CONFIG_SND_BCM2708_SOC_HIFIBERRY_DACPLUSDSP) += snd-soc-hifiberry-dacplusdsp.o
 160 +obj-$(CONFIG_SND_BCM2708_SOC_JUSTBOOM_BOTH) += snd-soc-justboom-both.o
 161  obj-$(CONFIG_SND_BCM2708_SOC_JUSTBOOM_DAC) += snd-soc-justboom-dac.o
 162  obj-$(CONFIG_SND_BCM2708_SOC_RPI_CIRRUS) += snd-soc-rpi-cirrus.o
 163  obj-$(CONFIG_SND_BCM2708_SOC_RPI_PROTO) += snd-soc-rpi-proto.o
 164 --- /dev/null
 165 +++ b/sound/soc/bcm/justboom-both.c
 166 @@ -0,0 +1,269 @@
 167 +// SPDX-License-Identifier: GPL-2.0
 168 +/*
 169 + * rpi--wm8804.c -- ALSA SoC Raspberry Pi soundcard.
 170 + *
 171 + * Authors: Johannes Krude <johannes@krude.de
 172 + *
 173 + * Driver for when connecting simultaneously justboom-digi and justboom-dac
 174 + *
 175 + * Based upon code from:
 176 + * justboom-digi.c
 177 + * by Milan Neskovic <info@justboom.co>
 178 + * justboom-dac.c
 179 + * by Milan Neskovic <info@justboom.co>
 180 + *
 181 + * This program is free software; you can redistribute it and/or
 182 + * modify it under the terms of the GNU General Public License
 183 + * version 2 as published by the Free Software Foundation.
 184 + *
 185 + * This program is distributed in the hope that it will be useful, but
 186 + * WITHOUT ANY WARRANTY; without even the implied warranty of
 187 + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 188 + * General Public License for more details.
 189 + */
 190 +
 191 +#include <linux/module.h>
 192 +#include <linux/platform_device.h>
 193 +
 194 +#include <sound/core.h>
 195 +#include <sound/pcm.h>
 196 +#include <sound/pcm_params.h>
 197 +#include <sound/soc.h>
 198 +#include <sound/jack.h>
 199 +
 200 +#include "../codecs/wm8804.h"
 201 +#include "../codecs/pcm512x.h"
 202 +
 203 +
 204 +static bool digital_gain_0db_limit = true;
 205 +
 206 +static int snd_rpi_justboom_both_init(struct snd_soc_pcm_runtime *rtd)
 207 +{
 208 +       struct snd_soc_component *digi = rtd->codec_dais[0]->component;
 209 +       struct snd_soc_component *dac = rtd->codec_dais[1]->component;
 210 +
 211 +       /* enable  TX output */
 212 +       snd_soc_component_update_bits(digi, WM8804_PWRDN, 0x4, 0x0);
 213 +
 214 +       snd_soc_component_update_bits(dac, PCM512x_GPIO_EN, 0x08, 0x08);
 215 +       snd_soc_component_update_bits(dac, PCM512x_GPIO_OUTPUT_4, 0xf, 0x02);
 216 +       snd_soc_component_update_bits(dac, PCM512x_GPIO_CONTROL_1, 0x08, 0x08);
 217 +
 218 +       if (digital_gain_0db_limit) {
 219 +               int ret;
 220 +               struct snd_soc_card *card = rtd->card;
 221 +
 222 +               ret = snd_soc_limit_volume(card, "Digital Playback Volume",
 223 +                                                                       207);
 224 +               if (ret < 0)
 225 +                       dev_warn(card->dev, "Failed to set volume limit: %d\n",
 226 +                                                                       ret);
 227 +       }
 228 +
 229 +       return 0;
 230 +}
 231 +
 232 +static int snd_rpi_justboom_both_hw_params(struct snd_pcm_substream *substream,
 233 +                                      struct snd_pcm_hw_params *params)
 234 +{
 235 +       struct snd_soc_pcm_runtime *rtd = substream->private_data;
 236 +       struct snd_soc_dai *codec_dai = rtd->codec_dai;
 237 +       struct snd_soc_component *digi = rtd->codec_dais[0]->component;
 238 +       struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 239 +
 240 +       int sysclk = 27000000; /* This is fixed on this board */
 241 +
 242 +       long mclk_freq    = 0;
 243 +       int mclk_div      = 1;
 244 +       int sampling_freq = 1;
 245 +
 246 +       int ret;
 247 +
 248 +       int samplerate = params_rate(params);
 249 +
 250 +       if (samplerate <= 96000) {
 251 +               mclk_freq = samplerate*256;
 252 +               mclk_div  = WM8804_MCLKDIV_256FS;
 253 +       } else {
 254 +               mclk_freq = samplerate*128;
 255 +               mclk_div  = WM8804_MCLKDIV_128FS;
 256 +       }
 257 +
 258 +       switch (samplerate) {
 259 +       case 32000:
 260 +               sampling_freq = 0x03;
 261 +               break;
 262 +       case 44100:
 263 +               sampling_freq = 0x00;
 264 +               break;
 265 +       case 48000:
 266 +               sampling_freq = 0x02;
 267 +               break;
 268 +       case 88200:
 269 +               sampling_freq = 0x08;
 270 +               break;
 271 +       case 96000:
 272 +               sampling_freq = 0x0a;
 273 +               break;
 274 +       case 176400:
 275 +               sampling_freq = 0x0c;
 276 +               break;
 277 +       case 192000:
 278 +               sampling_freq = 0x0e;
 279 +               break;
 280 +       default:
 281 +               dev_err(rtd->card->dev,
 282 +               "Failed to set WM8804 SYSCLK, unsupported samplerate %d\n",
 283 +               samplerate);
 284 +       }
 285 +
 286 +       snd_soc_dai_set_clkdiv(codec_dai, WM8804_MCLK_DIV, mclk_div);
 287 +       snd_soc_dai_set_pll(codec_dai, 0, 0, sysclk, mclk_freq);
 288 +
 289 +       ret = snd_soc_dai_set_sysclk(codec_dai, WM8804_TX_CLKSRC_PLL,
 290 +                                       sysclk, SND_SOC_CLOCK_OUT);
 291 +       if (ret < 0) {
 292 +               dev_err(rtd->card->dev,
 293 +               "Failed to set WM8804 SYSCLK: %d\n", ret);
 294 +               return ret;
 295 +       }
 296 +
 297 +       /* Enable TX output */
 298 +       snd_soc_component_update_bits(digi, WM8804_PWRDN, 0x4, 0x0);
 299 +
 300 +       /* Power on */
 301 +       snd_soc_component_update_bits(digi, WM8804_PWRDN, 0x9, 0);
 302 +
 303 +       /* set sampling frequency status bits */
 304 +       snd_soc_component_update_bits(digi, WM8804_SPDTX4, 0x0f, sampling_freq);
 305 +
 306 +       return snd_soc_dai_set_bclk_ratio(cpu_dai, 64);
 307 +}
 308 +
 309 +static int snd_rpi_justboom_both_startup(struct snd_pcm_substream *substream)
 310 +{
 311 +       struct snd_soc_pcm_runtime *rtd = substream->private_data;
 312 +       struct snd_soc_component *digi = rtd->codec_dais[0]->component;
 313 +       struct snd_soc_component *dac = rtd->codec_dais[1]->component;
 314 +
 315 +       /* turn on digital output */
 316 +       snd_soc_component_update_bits(digi, WM8804_PWRDN, 0x3c, 0x00);
 317 +
 318 +       snd_soc_component_update_bits(dac, PCM512x_GPIO_CONTROL_1, 0x08, 0x08);
 319 +
 320 +       return 0;
 321 +}
 322 +
 323 +static void snd_rpi_justboom_both_shutdown(struct snd_pcm_substream *substream)
 324 +{
 325 +       struct snd_soc_pcm_runtime *rtd = substream->private_data;
 326 +       struct snd_soc_component *digi = rtd->codec_dais[0]->component;
 327 +       struct snd_soc_component *dac = rtd->codec_dais[1]->component;
 328 +
 329 +       snd_soc_component_update_bits(dac, PCM512x_GPIO_CONTROL_1, 0x08, 0x00);
 330 +
 331 +       /* turn off output */
 332 +       snd_soc_component_update_bits(digi, WM8804_PWRDN, 0x3c, 0x3c);
 333 +}
 334 +
 335 +/* machine stream operations */
 336 +static struct snd_soc_ops snd_rpi_justboom_both_ops = {
 337 +       .hw_params = snd_rpi_justboom_both_hw_params,
 338 +       .startup   = snd_rpi_justboom_both_startup,
 339 +       .shutdown  = snd_rpi_justboom_both_shutdown,
 340 +};
 341 +
 342 +static struct snd_soc_dai_link_component justboom_both_codecs[] = {
 343 +{
 344 +       .dai_name = "wm8804-spdif",
 345 +       .name     = "wm8804.1-003b",
 346 +},
 347 +{
 348 +       .dai_name = "pcm512x-hifi",
 349 +       .name     = "pcm512x.1-004d",
 350 +},
 351 +};
 352 +
 353 +static struct snd_soc_dai_link snd_rpi_justboom_both_dai[] = {
 354 +{
 355 +       .name           = "JustBoom Digi",
 356 +       .stream_name    = "JustBoom Digi HiFi",
 357 +       .cpu_dai_name   = "bcm2708-i2s.0",
 358 +       .platform_name  = "bcm2708-i2s.0",
 359 +       .codecs         = justboom_both_codecs,
 360 +       .num_codecs     = ARRAY_SIZE(justboom_both_codecs),
 361 +       .dai_fmt        = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
 362 +                                       SND_SOC_DAIFMT_CBM_CFM,
 363 +       .ops            = &snd_rpi_justboom_both_ops,
 364 +       .init           = snd_rpi_justboom_both_init,
 365 +},
 366 +};
 367 +
 368 +/* audio machine driver */
 369 +static struct snd_soc_card snd_rpi_justboom_both = {
 370 +       .name             = "snd_rpi_justboom_both",
 371 +       .driver_name      = "JustBoomBoth",
 372 +       .owner            = THIS_MODULE,
 373 +       .dai_link         = snd_rpi_justboom_both_dai,
 374 +       .num_links        = ARRAY_SIZE(snd_rpi_justboom_both_dai),
 375 +};
 376 +
 377 +static int snd_rpi_justboom_both_probe(struct platform_device *pdev)
 378 +{
 379 +       int ret = 0;
 380 +
 381 +       snd_rpi_justboom_both.dev = &pdev->dev;
 382 +
 383 +       if (pdev->dev.of_node) {
 384 +               struct device_node *i2s_node;
 385 +               struct snd_soc_dai_link *dai = &snd_rpi_justboom_both_dai[0];
 386 +
 387 +               i2s_node = of_parse_phandle(pdev->dev.of_node,
 388 +                                       "i2s-controller", 0);
 389 +
 390 +               if (i2s_node) {
 391 +                       dai->cpu_dai_name = NULL;
 392 +                       dai->cpu_of_node = i2s_node;
 393 +                       dai->platform_name = NULL;
 394 +                       dai->platform_of_node = i2s_node;
 395 +               }
 396 +
 397 +               digital_gain_0db_limit = !of_property_read_bool(
 398 +                       pdev->dev.of_node, "justboom,24db_digital_gain");
 399 +       }
 400 +
 401 +       ret = snd_soc_register_card(&snd_rpi_justboom_both);
 402 +       if (ret && ret != -EPROBE_DEFER) {
 403 +               dev_err(&pdev->dev,
 404 +                       "snd_soc_register_card() failed: %d\n", ret);
 405 +       }
 406 +
 407 +       return ret;
 408 +}
 409 +
 410 +static int snd_rpi_justboom_both_remove(struct platform_device *pdev)
 411 +{
 412 +       return snd_soc_unregister_card(&snd_rpi_justboom_both);
 413 +}
 414 +
 415 +static const struct of_device_id snd_rpi_justboom_both_of_match[] = {
 416 +       { .compatible = "justboom,justboom-both", },
 417 +       {},
 418 +};
 419 +MODULE_DEVICE_TABLE(of, snd_rpi_justboom_both_of_match);
 420 +
 421 +static struct platform_driver snd_rpi_justboom_both_driver = {
 422 +       .driver = {
 423 +               .name   = "snd-rpi-justboom-both",
 424 +               .owner  = THIS_MODULE,
 425 +               .of_match_table = snd_rpi_justboom_both_of_match,
 426 +       },
 427 +       .probe          = snd_rpi_justboom_both_probe,
 428 +       .remove         = snd_rpi_justboom_both_remove,
 429 +};
 430 +
 431 +module_platform_driver(snd_rpi_justboom_both_driver);
 432 +
 433 +MODULE_AUTHOR("Johannes Krude <johannes@krude.de>");
 434 +MODULE_DESCRIPTION("ASoC Driver for simultaneous use of JustBoom PI Digi & DAC HAT Sound Cards");
 435 +MODULE_LICENSE("GPL v2");