target/linux/brcm2708/patches-4.14/950-0088-Allo-Digione-Driver-2048.patch

   1 From 525cdff530e74a8428a60859f9308bca825463fd Mon Sep 17 00:00:00 2001
   2 From: sandeepal <alsandeep@cem-solutions.net>
   3 Date: Fri, 2 Jun 2017 18:59:46 +0530
   4 Subject: [PATCH 088/454] Allo Digione Driver (#2048)
   5
   6 Driver for the Allo Digione soundcard
   7
   8 allo-digione: 192kHz clicking sound fix
   9
  10 See: https://github.com/raspberrypi/linux/pull/2149
  11 ---
  12  sound/soc/bcm/Kconfig        |   7 +
  13  sound/soc/bcm/Makefile       |   2 +
  14  sound/soc/bcm/allo-digione.c | 265 +++++++++++++++++++++++++++++++++++
  15  3 files changed, 274 insertions(+)
  16  create mode 100644 sound/soc/bcm/allo-digione.c
  17
  18 --- a/sound/soc/bcm/Kconfig
  19 +++ b/sound/soc/bcm/Kconfig
  20 @@ -176,6 +176,13 @@ config SND_BCM2708_SOC_ALLO_BOSS_DAC
  21         help
  22           Say Y or M if you want to add support for Allo Boss DAC.
  23
  24 +config SND_BCM2708_SOC_ALLO_DIGIONE
  25 +        tristate "Support for Allo DigiOne"
  26 +       depends on SND_BCM2708_SOC_I2S || SND_BCM2835_SOC_I2S
  27 +       select SND_SOC_PCM512x_I2C
  28 +       help
  29 +         Say Y or M if you want to add support for Allo DigiOne.
  30 +
  31  config SND_BCM2708_SOC_FE_PI_AUDIO
  32         tristate "Support for Fe-Pi-Audio"
  33         depends on SND_BCM2708_SOC_I2S || SND_BCM2835_SOC_I2S
  34 --- a/sound/soc/bcm/Makefile
  35 +++ b/sound/soc/bcm/Makefile
  36 @@ -34,6 +34,7 @@ snd-soc-dionaudio-loco-v2-objs := dionau
  37  snd-soc-allo-boss-dac-objs := allo-boss-dac.o
  38  snd-soc-allo-piano-dac-objs := allo-piano-dac.o
  39  snd-soc-allo-piano-dac-plus-objs := allo-piano-dac-plus.o
  40 +snd-soc-allo-digione-objs := allo-digione.o
  41  snd-soc-pisound-objs := pisound.o
  42  snd-soc-fe-pi-audio-objs := fe-pi-audio.o
  43
  44 @@ -60,5 +61,6 @@ obj-$(CONFIG_SND_BCM2708_SOC_DIONAUDIO_L
  45  obj-$(CONFIG_SND_BCM2708_SOC_ALLO_BOSS_DAC) += snd-soc-allo-boss-dac.o
  46  obj-$(CONFIG_SND_BCM2708_SOC_ALLO_PIANO_DAC) += snd-soc-allo-piano-dac.o
  47  obj-$(CONFIG_SND_BCM2708_SOC_ALLO_PIANO_DAC_PLUS) += snd-soc-allo-piano-dac-plus.o
  48 +obj-$(CONFIG_SND_BCM2708_SOC_ALLO_DIGIONE) += snd-soc-allo-digione.o
  49  obj-$(CONFIG_SND_PISOUND) += snd-soc-pisound.o
  50  obj-$(CONFIG_SND_BCM2708_SOC_FE_PI_AUDIO) += snd-soc-fe-pi-audio.o
  51 --- /dev/null
  52 +++ b/sound/soc/bcm/allo-digione.c
  53 @@ -0,0 +1,265 @@
  54 +/*
  55 + * ASoC Driver for Allo DigiOne
  56 + *
  57 + * Author: Baswaraj <jaikumar@cemsolutions.net>
  58 + *        Copyright 2017
  59 + * based on code by Daniel Matuschek <info@crazy-audio.com>
  60 + * based on code by Florian Meier <florian.meier@koalo.de>
  61 + *
  62 + * This program is free software; you can redistribute it and/or
  63 + * modify it under the terms of the GNU General Public License
  64 + * version 2 as published by the Free Software Foundation.
  65 + *
  66 + * This program is distributed in the hope that it will be useful, but
  67 + * WITHOUT ANY WARRANTY; without even the implied warranty of
  68 + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  69 + * General Public License for more details.
  70 + */
  71 +
  72 +#include <linux/module.h>
  73 +#include <linux/platform_device.h>
  74 +
  75 +#include <sound/core.h>
  76 +#include <sound/pcm.h>
  77 +#include <sound/pcm_params.h>
  78 +#include <sound/soc.h>
  79 +#include <sound/jack.h>
  80 +#include <linux/gpio/consumer.h>
  81 +
  82 +#include "../codecs/wm8804.h"
  83 +
  84 +static short int auto_shutdown_output;
  85 +module_param(auto_shutdown_output, short,
  86 +               S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP);
  87 +MODULE_PARM_DESC(auto_shutdown_output, "Shutdown SP/DIF output if playback is stopped");
  88 +
  89 +#define CLK_44EN_RATE 22579200UL
  90 +#define CLK_48EN_RATE 24576000UL
  91 +
  92 +static struct gpio_desc *snd_allo_clk44gpio;
  93 +static struct gpio_desc *snd_allo_clk48gpio;
  94 +
  95 +static int samplerate = 44100;
  96 +
  97 +static uint32_t snd_allo_digione_enable_clock(int sample_rate)
  98 +{
  99 +       switch (sample_rate) {
 100 +       case 11025:
 101 +       case 22050:
 102 +       case 44100:
 103 +       case 88200:
 104 +       case 176400:
 105 +               gpiod_set_value_cansleep(snd_allo_clk44gpio, 1);
 106 +               gpiod_set_value_cansleep(snd_allo_clk48gpio, 0);
 107 +               return CLK_44EN_RATE;
 108 +       default:
 109 +               gpiod_set_value_cansleep(snd_allo_clk48gpio, 1);
 110 +               gpiod_set_value_cansleep(snd_allo_clk44gpio, 0);
 111 +               return CLK_48EN_RATE;
 112 +       }
 113 +}
 114 +
 115 +
 116 +static int snd_allo_digione_init(struct snd_soc_pcm_runtime *rtd)
 117 +{
 118 +       struct snd_soc_codec *codec = rtd->codec;
 119 +
 120 +       /* enable TX output */
 121 +       snd_soc_update_bits(codec, WM8804_PWRDN, 0x4, 0x0);
 122 +
 123 +       return 0;
 124 +}
 125 +
 126 +static int snd_allo_digione_startup(struct snd_pcm_substream *substream)
 127 +{
 128 +       /* turn on digital output */
 129 +       struct snd_soc_pcm_runtime *rtd = substream->private_data;
 130 +       struct snd_soc_codec *codec = rtd->codec;
 131 +
 132 +       snd_soc_update_bits(codec, WM8804_PWRDN, 0x3c, 0x00);
 133 +       return 0;
 134 +}
 135 +
 136 +static void snd_allo_digione_shutdown(struct snd_pcm_substream *substream)
 137 +{
 138 +       /* turn off output */
 139 +       if (auto_shutdown_output) {
 140 +               /* turn off output */
 141 +               struct snd_soc_pcm_runtime *rtd = substream->private_data;
 142 +               struct snd_soc_codec *codec = rtd->codec;
 143 +
 144 +               snd_soc_update_bits(codec, WM8804_PWRDN, 0x3c, 0x3c);
 145 +       }
 146 +}
 147 +
 148 +static int snd_allo_digione_hw_params(struct snd_pcm_substream *substream,
 149 +                                      struct snd_pcm_hw_params *params)
 150 +{
 151 +       struct snd_soc_pcm_runtime *rtd = substream->private_data;
 152 +       struct snd_soc_dai *codec_dai = rtd->codec_dai;
 153 +       struct snd_soc_codec *codec = rtd->codec;
 154 +       struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 155 +
 156 +       int sysclk = 27000000; /* This is fixed on this board */
 157 +
 158 +       long mclk_freq = 0;
 159 +       int mclk_div = 1;
 160 +       int sampling_freq = 1;
 161 +
 162 +       int ret;
 163 +
 164 +       samplerate = params_rate(params);
 165 +       mclk_freq = samplerate * 256;
 166 +       mclk_div = WM8804_MCLKDIV_256FS;
 167 +
 168 +       sysclk = snd_allo_digione_enable_clock(samplerate);
 169 +
 170 +       switch (samplerate) {
 171 +       case 32000:
 172 +               sampling_freq = 0x03;
 173 +               break;
 174 +       case 44100:
 175 +               sampling_freq = 0x00;
 176 +               break;
 177 +       case 48000:
 178 +               sampling_freq = 0x02;
 179 +               break;
 180 +       case 88200:
 181 +               sampling_freq = 0x08;
 182 +               break;
 183 +       case 96000:
 184 +               sampling_freq = 0x0a;
 185 +               break;
 186 +       case 176400:
 187 +               sampling_freq = 0x0c;
 188 +               break;
 189 +       case 192000:
 190 +               sampling_freq = 0x0e;
 191 +               break;
 192 +       default:
 193 +               dev_err(codec->dev,
 194 +               "Failed to set WM8804 SYSCLK, unsupported samplerate %d\n",
 195 +               samplerate);
 196 +       }
 197 +
 198 +       snd_soc_dai_set_clkdiv(codec_dai, WM8804_MCLK_DIV, mclk_div);
 199 +       snd_soc_dai_set_pll(codec_dai, 0, 0, sysclk, mclk_freq);
 200 +
 201 +       ret = snd_soc_dai_set_sysclk(codec_dai, WM8804_TX_CLKSRC_PLL,
 202 +                                       sysclk, SND_SOC_CLOCK_OUT);
 203 +
 204 +       if (ret < 0) {
 205 +               dev_err(codec->dev,
 206 +               "Failed to set WM8804 SYSCLK: %d\n", ret);
 207 +               return ret;
 208 +       }
 209 +
 210 +       /* Enable TX output */
 211 +       snd_soc_update_bits(codec, WM8804_PWRDN, 0x4, 0x0);
 212 +
 213 +       /* Power on */
 214 +       snd_soc_update_bits(codec, WM8804_PWRDN, 0x9, 0);
 215 +
 216 +       /* set sampling frequency status bits */
 217 +       snd_soc_update_bits(codec, WM8804_SPDTX4, 0x0f, sampling_freq);
 218 +
 219 +       return snd_soc_dai_set_bclk_ratio(cpu_dai, 64);
 220 +}
 221 +
 222 +/* machine stream operations */
 223 +static struct snd_soc_ops snd_allo_digione_ops = {
 224 +       .hw_params      = snd_allo_digione_hw_params,
 225 +       .startup        = snd_allo_digione_startup,
 226 +       .shutdown       = snd_allo_digione_shutdown,
 227 +};
 228 +
 229 +static struct snd_soc_dai_link snd_allo_digione_dai[] = {
 230 +{
 231 +       .name           = "Allo DigiOne",
 232 +       .stream_name    = "Allo DigiOne HiFi",
 233 +       .cpu_dai_name   = "bcm2708-i2s.0",
 234 +       .codec_dai_name = "wm8804-spdif",
 235 +       .platform_name  = "bcm2708-i2s.0",
 236 +       .codec_name     = "wm8804.1-003b",
 237 +       .dai_fmt        = SND_SOC_DAIFMT_I2S |
 238 +                         SND_SOC_DAIFMT_NB_NF |
 239 +                         SND_SOC_DAIFMT_CBM_CFM,
 240 +       .ops            = &snd_allo_digione_ops,
 241 +       .init           = snd_allo_digione_init,
 242 +},
 243 +};
 244 +
 245 +/* audio machine driver */
 246 +static struct snd_soc_card snd_allo_digione = {
 247 +       .name         = "snd_allo_digione",
 248 +       .driver_name  = "AlloDigiOne",
 249 +       .owner        = THIS_MODULE,
 250 +       .dai_link     = snd_allo_digione_dai,
 251 +       .num_links    = ARRAY_SIZE(snd_allo_digione_dai),
 252 +};
 253 +
 254 +static int snd_allo_digione_probe(struct platform_device *pdev)
 255 +{
 256 +       int ret = 0;
 257 +
 258 +       snd_allo_digione.dev = &pdev->dev;
 259 +
 260 +       if (pdev->dev.of_node) {
 261 +               struct device_node *i2s_node;
 262 +               struct snd_soc_dai_link *dai = &snd_allo_digione_dai[0];
 263 +
 264 +               i2s_node = of_parse_phandle(pdev->dev.of_node,
 265 +                               "i2s-controller", 0);
 266 +
 267 +               if (i2s_node) {
 268 +                       dai->cpu_dai_name = NULL;
 269 +                       dai->cpu_of_node = i2s_node;
 270 +                       dai->platform_name = NULL;
 271 +                       dai->platform_of_node = i2s_node;
 272 +               }
 273 +
 274 +               snd_allo_clk44gpio =
 275 +                       devm_gpiod_get(&pdev->dev, "clock44", GPIOD_OUT_LOW);
 276 +               if (IS_ERR(snd_allo_clk44gpio))
 277 +                       dev_err(&pdev->dev, "devm_gpiod_get() failed\n");
 278 +
 279 +               snd_allo_clk48gpio =
 280 +                       devm_gpiod_get(&pdev->dev, "clock48", GPIOD_OUT_LOW);
 281 +               if (IS_ERR(snd_allo_clk48gpio))
 282 +                       dev_err(&pdev->dev, "devm_gpiod_get() failed\n");
 283 +       }
 284 +
 285 +       ret = snd_soc_register_card(&snd_allo_digione);
 286 +       if (ret && ret != -EPROBE_DEFER)
 287 +               dev_err(&pdev->dev, "snd_soc_register_card() failed: %d\n",
 288 +                       ret);
 289 +
 290 +       return ret;
 291 +}
 292 +
 293 +static int snd_allo_digione_remove(struct platform_device *pdev)
 294 +{
 295 +       return snd_soc_unregister_card(&snd_allo_digione);
 296 +}
 297 +
 298 +static const struct of_device_id snd_allo_digione_of_match[] = {
 299 +       { .compatible = "allo,allo-digione", },
 300 +       {},
 301 +};
 302 +MODULE_DEVICE_TABLE(of, snd_allo_digione_of_match);
 303 +
 304 +static struct platform_driver snd_allo_digione_driver = {
 305 +       .driver = {
 306 +               .name           = "snd-allo-digione",
 307 +               .owner          = THIS_MODULE,
 308 +               .of_match_table = snd_allo_digione_of_match,
 309 +       },
 310 +       .probe  = snd_allo_digione_probe,
 311 +       .remove = snd_allo_digione_remove,
 312 +};
 313 +
 314 +module_platform_driver(snd_allo_digione_driver);
 315 +
 316 +MODULE_AUTHOR("Baswaraj <jaikumar@cem-solutions.net>");
 317 +MODULE_DESCRIPTION("ASoC Driver for Allo DigiOne");
 318 +MODULE_LICENSE("GPL v2");