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                           const 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                                      const 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 #ifdef CONFIG_DEBUG_FS
 107         .debugfs_prefix         = "cpu",
 108 #endif
 109 };
 110
 111 static struct snd_soc_dai_driver aiu_cpu_dai_drv[] = {
 112         [CPU_I2S_FIFO] = {
 113                 .name = "I2S FIFO",
 114                 .playback = {
 115                         .stream_name    = "I2S FIFO Playback",
 116                         .channels_min   = 2,
 117                         .channels_max   = 8,
 118                         .rates          = SNDRV_PCM_RATE_CONTINUOUS,
 119                         .rate_min       = 5512,
 120                         .rate_max       = 192000,
 121                         .formats        = AIU_FORMATS,
 122                 },
 123                 .ops            = &aiu_fifo_i2s_dai_ops,
 124                 .pcm_new        = aiu_fifo_pcm_new,
 125                 .probe          = aiu_fifo_i2s_dai_probe,
 126                 .remove         = aiu_fifo_dai_remove,
 127         },
 128         [CPU_SPDIF_FIFO] = {
 129                 .name = "SPDIF FIFO",
 130                 .playback = {
 131                         .stream_name    = "SPDIF FIFO Playback",
 132                         .channels_min   = 2,
 133                         .channels_max   = 2,
 134                         .rates          = SNDRV_PCM_RATE_CONTINUOUS,
 135                         .rate_min       = 5512,
 136                         .rate_max       = 192000,
 137                         .formats        = AIU_FORMATS,
 138                 },
 139                 .ops            = &aiu_fifo_spdif_dai_ops,
 140                 .pcm_new        = aiu_fifo_pcm_new,
 141                 .probe          = aiu_fifo_spdif_dai_probe,
 142                 .remove         = aiu_fifo_dai_remove,
 143         },
 144         [CPU_I2S_ENCODER] = {
 145                 .name = "I2S Encoder",
 146                 .playback = {
 147                         .stream_name = "I2S Encoder Playback",
 148                         .channels_min = 2,
 149                         .channels_max = 8,
 150                         .rates = SNDRV_PCM_RATE_8000_192000,
 151                         .formats = AIU_FORMATS,
 152                 },
 153                 .ops = &aiu_encoder_i2s_dai_ops,
 154         },
 155         [CPU_SPDIF_ENCODER] = {
 156                 .name = "SPDIF Encoder",
 157                 .playback = {
 158                         .stream_name = "SPDIF Encoder Playback",
 159                         .channels_min = 2,
 160                         .channels_max = 2,
 161                         .rates = (SNDRV_PCM_RATE_32000  |
 162                                   SNDRV_PCM_RATE_44100  |
 163                                   SNDRV_PCM_RATE_48000  |
 164                                   SNDRV_PCM_RATE_88200  |
 165                                   SNDRV_PCM_RATE_96000  |
 166                                   SNDRV_PCM_RATE_176400 |
 167                                   SNDRV_PCM_RATE_192000),
 168                         .formats = AIU_FORMATS,
 169                 },
 170                 .ops = &aiu_encoder_spdif_dai_ops,
 171         }
 172 };
 173
 174 static const struct regmap_config aiu_regmap_cfg = {
 175         .reg_bits       = 32,
 176         .val_bits       = 32,
 177         .reg_stride     = 4,
 178         .max_register   = 0x2ac,
 179 };
 180
 181 static int aiu_clk_bulk_get(struct device *dev,
 182                             const char * const *ids,
 183                             unsigned int num,
 184                             struct aiu_interface *interface)
 185 {
 186         struct clk_bulk_data *clks;
 187         int i, ret;
 188
 189         clks = devm_kcalloc(dev, num, sizeof(*clks), GFP_KERNEL);
 190         if (!clks)
 191                 return -ENOMEM;
 192
 193         for (i = 0; i < num; i++)
 194                 clks[i].id = ids[i];
 195
 196         ret = devm_clk_bulk_get(dev, num, clks);
 197         if (ret < 0)
 198                 return ret;
 199
 200         interface->clks = clks;
 201         interface->clk_num = num;
 202         return 0;
 203 }
 204
 205 static const char * const aiu_i2s_ids[] = {
 206         [PCLK]  = "i2s_pclk",
 207         [AOCLK] = "i2s_aoclk",
 208         [MCLK]  = "i2s_mclk",
 209         [MIXER] = "i2s_mixer",
 210 };
 211
 212 static const char * const aiu_spdif_ids[] = {
 213         [PCLK]  = "spdif_pclk",
 214         [AOCLK] = "spdif_aoclk",
 215         [MCLK]  = "spdif_mclk_sel"
 216 };
 217
 218 static int aiu_clk_get(struct device *dev)
 219 {
 220         struct aiu *aiu = dev_get_drvdata(dev);
 221         struct clk *pclk;
 222         int ret;
 223
 224         pclk = devm_clk_get_enabled(dev, "pclk");
 225         if (IS_ERR(pclk))
 226                 return dev_err_probe(dev, PTR_ERR(pclk), "Can't get the aiu pclk\n");
 227
 228         aiu->spdif_mclk = devm_clk_get(dev, "spdif_mclk");
 229         if (IS_ERR(aiu->spdif_mclk))
 230                 return dev_err_probe(dev, PTR_ERR(aiu->spdif_mclk),
 231                                      "Can't get the aiu spdif master clock\n");
 232
 233         ret = aiu_clk_bulk_get(dev, aiu_i2s_ids, ARRAY_SIZE(aiu_i2s_ids),
 234                                &aiu->i2s);
 235         if (ret)
 236                 return dev_err_probe(dev, ret, "Can't get the i2s clocks\n");
 237
 238         ret = aiu_clk_bulk_get(dev, aiu_spdif_ids, ARRAY_SIZE(aiu_spdif_ids),
 239                                &aiu->spdif);
 240         if (ret)
 241                 return dev_err_probe(dev, ret, "Can't get the spdif clocks\n");
 242
 243         return ret;
 244 }
 245
 246 static int aiu_probe(struct platform_device *pdev)
 247 {
 248         struct device *dev = &pdev->dev;
 249         void __iomem *regs;
 250         struct regmap *map;
 251         struct aiu *aiu;
 252         int ret;
 253
 254         aiu = devm_kzalloc(dev, sizeof(*aiu), GFP_KERNEL);
 255         if (!aiu)
 256                 return -ENOMEM;
 257
 258         aiu->platform = device_get_match_data(dev);
 259         if (!aiu->platform)
 260                 return -ENODEV;
 261
 262         platform_set_drvdata(pdev, aiu);
 263
 264         ret = device_reset(dev);
 265         if (ret)
 266                 return dev_err_probe(dev, ret, "Failed to reset device\n");
 267
 268         regs = devm_platform_ioremap_resource(pdev, 0);
 269         if (IS_ERR(regs))
 270                 return PTR_ERR(regs);
 271
 272         map = devm_regmap_init_mmio(dev, regs, &aiu_regmap_cfg);
 273         if (IS_ERR(map)) {
 274                 dev_err(dev, "failed to init regmap: %ld\n",
 275                         PTR_ERR(map));
 276                 return PTR_ERR(map);
 277         }
 278
 279         aiu->i2s.irq = platform_get_irq_byname(pdev, "i2s");
 280         if (aiu->i2s.irq < 0)
 281                 return aiu->i2s.irq;
 282
 283         aiu->spdif.irq = platform_get_irq_byname(pdev, "spdif");
 284         if (aiu->spdif.irq < 0)
 285                 return aiu->spdif.irq;
 286
 287         ret = aiu_clk_get(dev);
 288         if (ret)
 289                 return ret;
 290
 291         /* Register the cpu component of the aiu */
 292         ret = snd_soc_register_component(dev, &aiu_cpu_component,
 293                                          aiu_cpu_dai_drv,
 294                                          ARRAY_SIZE(aiu_cpu_dai_drv));
 295         if (ret) {
 296                 dev_err(dev, "Failed to register cpu component\n");
 297                 return ret;
 298         }
 299
 300         /* Register the hdmi codec control component */
 301         ret = aiu_hdmi_ctrl_register_component(dev);
 302         if (ret) {
 303                 dev_err(dev, "Failed to register hdmi control component\n");
 304                 goto err;
 305         }
 306
 307         /* Register the internal dac control component on gxl */
 308         if (aiu->platform->has_acodec) {
 309                 ret = aiu_acodec_ctrl_register_component(dev);
 310                 if (ret) {
 311                         dev_err(dev,
 312                             "Failed to register acodec control component\n");
 313                         goto err;
 314                 }
 315         }
 316
 317         return 0;
 318 err:
 319         snd_soc_unregister_component(dev);
 320         return ret;
 321 }
 322
 323 static int aiu_remove(struct platform_device *pdev)
 324 {
 325         snd_soc_unregister_component(&pdev->dev);
 326
 327         return 0;
 328 }
 329
 330 static const struct aiu_platform_data aiu_gxbb_pdata = {
 331         .has_acodec = false,
 332         .has_clk_ctrl_more_i2s_div = true,
 333 };
 334
 335 static const struct aiu_platform_data aiu_gxl_pdata = {
 336         .has_acodec = true,
 337         .has_clk_ctrl_more_i2s_div = true,
 338 };
 339
 340 static const struct aiu_platform_data aiu_meson8_pdata = {
 341         .has_acodec = false,
 342         .has_clk_ctrl_more_i2s_div = false,
 343 };
 344
 345 static const struct of_device_id aiu_of_match[] = {
 346         { .compatible = "amlogic,aiu-gxbb", .data = &aiu_gxbb_pdata },
 347         { .compatible = "amlogic,aiu-gxl", .data = &aiu_gxl_pdata },
 348         { .compatible = "amlogic,aiu-meson8", .data = &aiu_meson8_pdata },
 349         { .compatible = "amlogic,aiu-meson8b", .data = &aiu_meson8_pdata },
 350         {}
 351 };
 352 MODULE_DEVICE_TABLE(of, aiu_of_match);
 353
 354 static struct platform_driver aiu_pdrv = {
 355         .probe = aiu_probe,
 356         .remove = aiu_remove,
 357         .driver = {
 358                 .name = "meson-aiu",
 359                 .of_match_table = aiu_of_match,
 360         },
 361 };
 362 module_platform_driver(aiu_pdrv);
 363
 364 MODULE_DESCRIPTION("Meson AIU Driver");
 365 MODULE_AUTHOR("Jerome Brunet <jbrunet@baylibre.com>");
 366 MODULE_LICENSE("GPL v2");