sound/soc/meson/aiu.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 //
   3 // Copyright (c) 2020 BayLibre, SAS.
   4 // Author: Jerome Brunet <jbrunet@baylibre.com>
   5
   6 #include <linux/bitfield.h>
   7 #include <linux/clk.h>
   8 #include <linux/module.h>
   9 #include <linux/of_platform.h>
  10 #include <linux/regmap.h>
  11 #include <linux/reset.h>
  12 #include <sound/soc.h>
  13 #include <sound/soc-dai.h>
  14
  15 #include <dt-bindings/sound/meson-aiu.h>
  16 #include "aiu.h"
  17 #include "aiu-fifo.h"
  18
  19 #define AIU_I2S_MISC_958_SRC_SHIFT 3
  20
  21 static const char * const aiu_spdif_encode_sel_texts[] = {
  22         "SPDIF", "I2S",
  23 };
  24
  25 static SOC_ENUM_SINGLE_DECL(aiu_spdif_encode_sel_enum, AIU_I2S_MISC,
  26                             AIU_I2S_MISC_958_SRC_SHIFT,
  27                             aiu_spdif_encode_sel_texts);
  28
  29 static const struct snd_kcontrol_new aiu_spdif_encode_mux =
  30         SOC_DAPM_ENUM("SPDIF Buffer Src", aiu_spdif_encode_sel_enum);
  31
  32 static const struct snd_soc_dapm_widget aiu_cpu_dapm_widgets[] = {
  33         SND_SOC_DAPM_MUX("SPDIF SRC SEL", SND_SOC_NOPM, 0, 0,
  34                          &aiu_spdif_encode_mux),
  35 };
  36
  37 static const struct snd_soc_dapm_route aiu_cpu_dapm_routes[] = {
  38         { "I2S Encoder Playback", NULL, "I2S FIFO Playback" },
  39         { "SPDIF SRC SEL", "SPDIF", "SPDIF FIFO Playback" },
  40         { "SPDIF SRC SEL", "I2S", "I2S FIFO Playback" },
  41         { "SPDIF Encoder Playback", NULL, "SPDIF SRC SEL" },
  42 };
  43
  44 int aiu_of_xlate_dai_name(struct snd_soc_component *component,
  45                           struct of_phandle_args *args,
  46                           const char **dai_name,
  47                           unsigned int component_id)
  48 {
  49         struct snd_soc_dai *dai;
  50         int id;
  51
  52         if (args->args_count != 2)
  53                 return -EINVAL;
  54
  55         if (args->args[0] != component_id)
  56                 return -EINVAL;
  57
  58         id = args->args[1];
  59
  60         if (id < 0 || id >= component->num_dai)
  61                 return -EINVAL;
  62
  63         for_each_component_dais(component, dai) {
  64                 if (id == 0)
  65                         break;
  66                 id--;
  67         }
  68
  69         *dai_name = dai->driver->name;
  70
  71         return 0;
  72 }
  73
  74 static int aiu_cpu_of_xlate_dai_name(struct snd_soc_component *component,
  75                                      struct of_phandle_args *args,
  76                                      const char **dai_name)
  77 {
  78         return aiu_of_xlate_dai_name(component, args, dai_name, AIU_CPU);
  79 }
  80
  81 static int aiu_cpu_component_probe(struct snd_soc_component *component)
  82 {
  83         struct aiu *aiu = snd_soc_component_get_drvdata(component);
  84
  85         /* Required for the SPDIF Source control operation */
  86         return clk_prepare_enable(aiu->i2s.clks[PCLK].clk);
  87 }
  88
  89 static void aiu_cpu_component_remove(struct snd_soc_component *component)
  90 {
  91         struct aiu *aiu = snd_soc_component_get_drvdata(component);
  92
  93         clk_disable_unprepare(aiu->i2s.clks[PCLK].clk);
  94 }
  95
  96 static const struct snd_soc_component_driver aiu_cpu_component = {
  97         .name                   = "AIU CPU",
  98         .dapm_widgets           = aiu_cpu_dapm_widgets,
  99         .num_dapm_widgets       = ARRAY_SIZE(aiu_cpu_dapm_widgets),
 100         .dapm_routes            = aiu_cpu_dapm_routes,
 101         .num_dapm_routes        = ARRAY_SIZE(aiu_cpu_dapm_routes),
 102         .of_xlate_dai_name      = aiu_cpu_of_xlate_dai_name,
 103         .pointer                = aiu_fifo_pointer,
 104         .probe                  = aiu_cpu_component_probe,
 105         .remove                 = aiu_cpu_component_remove,
 106 };
 107
 108 static struct snd_soc_dai_driver aiu_cpu_dai_drv[] = {
 109         [CPU_I2S_FIFO] = {
 110                 .name = "I2S FIFO",
 111                 .playback = {
 112                         .stream_name    = "I2S FIFO Playback",
 113                         .channels_min   = 2,
 114                         .channels_max   = 8,
 115                         .rates          = SNDRV_PCM_RATE_CONTINUOUS,
 116                         .rate_min       = 5512,
 117                         .rate_max       = 192000,
 118                         .formats        = AIU_FORMATS,
 119                 },
 120                 .ops            = &aiu_fifo_i2s_dai_ops,
 121                 .pcm_new        = aiu_fifo_pcm_new,
 122                 .probe          = aiu_fifo_i2s_dai_probe,
 123                 .remove         = aiu_fifo_dai_remove,
 124         },
 125         [CPU_SPDIF_FIFO] = {
 126                 .name = "SPDIF FIFO",
 127                 .playback = {
 128                         .stream_name    = "SPDIF FIFO Playback",
 129                         .channels_min   = 2,
 130                         .channels_max   = 2,
 131                         .rates          = SNDRV_PCM_RATE_CONTINUOUS,
 132                         .rate_min       = 5512,
 133                         .rate_max       = 192000,
 134                         .formats        = AIU_FORMATS,
 135                 },
 136                 .ops            = &aiu_fifo_spdif_dai_ops,
 137                 .pcm_new        = aiu_fifo_pcm_new,
 138                 .probe          = aiu_fifo_spdif_dai_probe,
 139                 .remove         = aiu_fifo_dai_remove,
 140         },
 141         [CPU_I2S_ENCODER] = {
 142                 .name = "I2S Encoder",
 143                 .playback = {
 144                         .stream_name = "I2S Encoder Playback",
 145                         .channels_min = 2,
 146                         .channels_max = 8,
 147                         .rates = SNDRV_PCM_RATE_8000_192000,
 148                         .formats = AIU_FORMATS,
 149                 },
 150                 .ops = &aiu_encoder_i2s_dai_ops,
 151         },
 152         [CPU_SPDIF_ENCODER] = {
 153                 .name = "SPDIF Encoder",
 154                 .playback = {
 155                         .stream_name = "SPDIF Encoder Playback",
 156                         .channels_min = 2,
 157                         .channels_max = 2,
 158                         .rates = (SNDRV_PCM_RATE_32000  |
 159                                   SNDRV_PCM_RATE_44100  |
 160                                   SNDRV_PCM_RATE_48000  |
 161                                   SNDRV_PCM_RATE_88200  |
 162                                   SNDRV_PCM_RATE_96000  |
 163                                   SNDRV_PCM_RATE_176400 |
 164                                   SNDRV_PCM_RATE_192000),
 165                         .formats = AIU_FORMATS,
 166                 },
 167                 .ops = &aiu_encoder_spdif_dai_ops,
 168         }
 169 };
 170
 171 static const struct regmap_config aiu_regmap_cfg = {
 172         .reg_bits       = 32,
 173         .val_bits       = 32,
 174         .reg_stride     = 4,
 175         .max_register   = 0x2ac,
 176 };
 177
 178 static int aiu_clk_bulk_get(struct device *dev,
 179                             const char * const *ids,
 180                             unsigned int num,
 181                             struct aiu_interface *interface)
 182 {
 183         struct clk_bulk_data *clks;
 184         int i, ret;
 185
 186         clks = devm_kcalloc(dev, num, sizeof(*clks), GFP_KERNEL);
 187         if (!clks)
 188                 return -ENOMEM;
 189
 190         for (i = 0; i < num; i++)
 191                 clks[i].id = ids[i];
 192
 193         ret = devm_clk_bulk_get(dev, num, clks);
 194         if (ret < 0)
 195                 return ret;
 196
 197         interface->clks = clks;
 198         interface->clk_num = num;
 199         return 0;
 200 }
 201
 202 static const char * const aiu_i2s_ids[] = {
 203         [PCLK]  = "i2s_pclk",
 204         [AOCLK] = "i2s_aoclk",
 205         [MCLK]  = "i2s_mclk",
 206         [MIXER] = "i2s_mixer",
 207 };
 208
 209 static const char * const aiu_spdif_ids[] = {
 210         [PCLK]  = "spdif_pclk",
 211         [AOCLK] = "spdif_aoclk",
 212         [MCLK]  = "spdif_mclk_sel"
 213 };
 214
 215 static int aiu_clk_get(struct device *dev)
 216 {
 217         struct aiu *aiu = dev_get_drvdata(dev);
 218         int ret;
 219
 220         aiu->pclk = devm_clk_get(dev, "pclk");
 221         if (IS_ERR(aiu->pclk)) {
 222                 if (PTR_ERR(aiu->pclk) != -EPROBE_DEFER)
 223                         dev_err(dev, "Can't get the aiu pclk\n");
 224                 return PTR_ERR(aiu->pclk);
 225         }
 226
 227         aiu->spdif_mclk = devm_clk_get(dev, "spdif_mclk");
 228         if (IS_ERR(aiu->spdif_mclk)) {
 229                 if (PTR_ERR(aiu->spdif_mclk) != -EPROBE_DEFER)
 230                         dev_err(dev, "Can't get the aiu spdif master clock\n");
 231                 return PTR_ERR(aiu->spdif_mclk);
 232         }
 233
 234         ret = aiu_clk_bulk_get(dev, aiu_i2s_ids, ARRAY_SIZE(aiu_i2s_ids),
 235                                &aiu->i2s);
 236         if (ret) {
 237                 if (ret != -EPROBE_DEFER)
 238                         dev_err(dev, "Can't get the i2s clocks\n");
 239                 return ret;
 240         }
 241
 242         ret = aiu_clk_bulk_get(dev, aiu_spdif_ids, ARRAY_SIZE(aiu_spdif_ids),
 243                                &aiu->spdif);
 244         if (ret) {
 245                 if (ret != -EPROBE_DEFER)
 246                         dev_err(dev, "Can't get the spdif clocks\n");
 247                 return ret;
 248         }
 249
 250         ret = clk_prepare_enable(aiu->pclk);
 251         if (ret) {
 252                 dev_err(dev, "peripheral clock enable failed\n");
 253                 return ret;
 254         }
 255
 256         ret = devm_add_action_or_reset(dev,
 257                                        (void(*)(void *))clk_disable_unprepare,
 258                                        aiu->pclk);
 259         if (ret)
 260                 dev_err(dev, "failed to add reset action on pclk");
 261
 262         return ret;
 263 }
 264
 265 static int aiu_probe(struct platform_device *pdev)
 266 {
 267         struct device *dev = &pdev->dev;
 268         void __iomem *regs;
 269         struct regmap *map;
 270         struct aiu *aiu;
 271         int ret;
 272
 273         aiu = devm_kzalloc(dev, sizeof(*aiu), GFP_KERNEL);
 274         if (!aiu)
 275                 return -ENOMEM;
 276
 277         aiu->platform = device_get_match_data(dev);
 278         if (!aiu->platform)
 279                 return -ENODEV;
 280
 281         platform_set_drvdata(pdev, aiu);
 282
 283         ret = device_reset(dev);
 284         if (ret) {
 285                 if (ret != -EPROBE_DEFER)
 286                         dev_err(dev, "Failed to reset device\n");
 287                 return ret;
 288         }
 289
 290         regs = devm_platform_ioremap_resource(pdev, 0);
 291         if (IS_ERR(regs))
 292                 return PTR_ERR(regs);
 293
 294         map = devm_regmap_init_mmio(dev, regs, &aiu_regmap_cfg);
 295         if (IS_ERR(map)) {
 296                 dev_err(dev, "failed to init regmap: %ld\n",
 297                         PTR_ERR(map));
 298                 return PTR_ERR(map);
 299         }
 300
 301         aiu->i2s.irq = platform_get_irq_byname(pdev, "i2s");
 302         if (aiu->i2s.irq < 0)
 303                 return aiu->i2s.irq;
 304
 305         aiu->spdif.irq = platform_get_irq_byname(pdev, "spdif");
 306         if (aiu->spdif.irq < 0)
 307                 return aiu->spdif.irq;
 308
 309         ret = aiu_clk_get(dev);
 310         if (ret)
 311                 return ret;
 312
 313         /* Register the cpu component of the aiu */
 314         ret = snd_soc_register_component(dev, &aiu_cpu_component,
 315                                          aiu_cpu_dai_drv,
 316                                          ARRAY_SIZE(aiu_cpu_dai_drv));
 317         if (ret) {
 318                 dev_err(dev, "Failed to register cpu component\n");
 319                 return ret;
 320         }
 321
 322         /* Register the hdmi codec control component */
 323         ret = aiu_hdmi_ctrl_register_component(dev);
 324         if (ret) {
 325                 dev_err(dev, "Failed to register hdmi control component\n");
 326                 goto err;
 327         }
 328
 329         /* Register the internal dac control component on gxl */
 330         if (aiu->platform->has_acodec) {
 331                 ret = aiu_acodec_ctrl_register_component(dev);
 332                 if (ret) {
 333                         dev_err(dev,
 334                             "Failed to register acodec control component\n");
 335                         goto err;
 336                 }
 337         }
 338
 339         return 0;
 340 err:
 341         snd_soc_unregister_component(dev);
 342         return ret;
 343 }
 344
 345 static int aiu_remove(struct platform_device *pdev)
 346 {
 347         snd_soc_unregister_component(&pdev->dev);
 348
 349         return 0;
 350 }
 351
 352 static const struct aiu_platform_data aiu_gxbb_pdata = {
 353         .has_acodec = false,
 354         .has_clk_ctrl_more_i2s_div = true,
 355 };
 356
 357 static const struct aiu_platform_data aiu_gxl_pdata = {
 358         .has_acodec = true,
 359         .has_clk_ctrl_more_i2s_div = true,
 360 };
 361
 362 static const struct aiu_platform_data aiu_meson8_pdata = {
 363         .has_acodec = false,
 364         .has_clk_ctrl_more_i2s_div = false,
 365 };
 366
 367 static const struct of_device_id aiu_of_match[] = {
 368         { .compatible = "amlogic,aiu-gxbb", .data = &aiu_gxbb_pdata },
 369         { .compatible = "amlogic,aiu-gxl", .data = &aiu_gxl_pdata },
 370         { .compatible = "amlogic,aiu-meson8", .data = &aiu_meson8_pdata },
 371         { .compatible = "amlogic,aiu-meson8b", .data = &aiu_meson8_pdata },
 372         {}
 373 };
 374 MODULE_DEVICE_TABLE(of, aiu_of_match);
 375
 376 static struct platform_driver aiu_pdrv = {
 377         .probe = aiu_probe,
 378         .remove = aiu_remove,
 379         .driver = {
 380                 .name = "meson-aiu",
 381                 .of_match_table = aiu_of_match,
 382         },
 383 };
 384 module_platform_driver(aiu_pdrv);
 385
 386 MODULE_DESCRIPTION("Meson AIU Driver");
 387 MODULE_AUTHOR("Jerome Brunet <jbrunet@baylibre.com>");
 388 MODULE_LICENSE("GPL v2");