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 }, 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 }, 138 [CPU_I2S_ENCODER] = { 139 .name = "I2S Encoder", 140 .playback = { 141 .stream_name = "I2S Encoder Playback", 142 .channels_min = 2, 143 .channels_max = 8, 144 .rates = SNDRV_PCM_RATE_8000_192000, 145 .formats = AIU_FORMATS, 146 }, 147 .ops = &aiu_encoder_i2s_dai_ops, 148 }, 149 [CPU_SPDIF_ENCODER] = { 150 .name = "SPDIF Encoder", 151 .playback = { 152 .stream_name = "SPDIF Encoder Playback", 153 .channels_min = 2, 154 .channels_max = 2, 155 .rates = (SNDRV_PCM_RATE_32000 | 156 SNDRV_PCM_RATE_44100 | 157 SNDRV_PCM_RATE_48000 | 158 SNDRV_PCM_RATE_88200 | 159 SNDRV_PCM_RATE_96000 | 160 SNDRV_PCM_RATE_176400 | 161 SNDRV_PCM_RATE_192000), 162 .formats = AIU_FORMATS, 163 }, 164 .ops = &aiu_encoder_spdif_dai_ops, 165 } 166 }; 167 168 static const struct regmap_config aiu_regmap_cfg = { 169 .reg_bits = 32, 170 .val_bits = 32, 171 .reg_stride = 4, 172 .max_register = 0x2ac, 173 }; 174 175 static int aiu_clk_bulk_get(struct device *dev, 176 const char * const *ids, 177 unsigned int num, 178 struct aiu_interface *interface) 179 { 180 struct clk_bulk_data *clks; 181 int i, ret; 182 183 clks = devm_kcalloc(dev, num, sizeof(*clks), GFP_KERNEL); 184 if (!clks) 185 return -ENOMEM; 186 187 for (i = 0; i < num; i++) 188 clks[i].id = ids[i]; 189 190 ret = devm_clk_bulk_get(dev, num, clks); 191 if (ret < 0) 192 return ret; 193 194 interface->clks = clks; 195 interface->clk_num = num; 196 return 0; 197 } 198 199 static const char * const aiu_i2s_ids[] = { 200 [PCLK] = "i2s_pclk", 201 [AOCLK] = "i2s_aoclk", 202 [MCLK] = "i2s_mclk", 203 [MIXER] = "i2s_mixer", 204 }; 205 206 static const char * const aiu_spdif_ids[] = { 207 [PCLK] = "spdif_pclk", 208 [AOCLK] = "spdif_aoclk", 209 [MCLK] = "spdif_mclk_sel" 210 }; 211 212 static int aiu_clk_get(struct device *dev) 213 { 214 struct aiu *aiu = dev_get_drvdata(dev); 215 int ret; 216 217 aiu->pclk = devm_clk_get(dev, "pclk"); 218 if (IS_ERR(aiu->pclk)) 219 return dev_err_probe(dev, PTR_ERR(aiu->pclk), "Can't get the aiu pclk\n"); 220 221 aiu->spdif_mclk = devm_clk_get(dev, "spdif_mclk"); 222 if (IS_ERR(aiu->spdif_mclk)) 223 return dev_err_probe(dev, PTR_ERR(aiu->spdif_mclk), 224 "Can't get the aiu spdif master clock\n"); 225 226 ret = aiu_clk_bulk_get(dev, aiu_i2s_ids, ARRAY_SIZE(aiu_i2s_ids), 227 &aiu->i2s); 228 if (ret) 229 return dev_err_probe(dev, ret, "Can't get the i2s clocks\n"); 230 231 ret = aiu_clk_bulk_get(dev, aiu_spdif_ids, ARRAY_SIZE(aiu_spdif_ids), 232 &aiu->spdif); 233 if (ret) 234 return dev_err_probe(dev, ret, "Can't get the spdif clocks\n"); 235 236 ret = clk_prepare_enable(aiu->pclk); 237 if (ret) { 238 dev_err(dev, "peripheral clock enable failed\n"); 239 return ret; 240 } 241 242 ret = devm_add_action_or_reset(dev, 243 (void(*)(void *))clk_disable_unprepare, 244 aiu->pclk); 245 if (ret) 246 dev_err(dev, "failed to add reset action on pclk"); 247 248 return ret; 249 } 250 251 static int aiu_probe(struct platform_device *pdev) 252 { 253 struct device *dev = &pdev->dev; 254 void __iomem *regs; 255 struct regmap *map; 256 struct aiu *aiu; 257 int ret; 258 259 aiu = devm_kzalloc(dev, sizeof(*aiu), GFP_KERNEL); 260 if (!aiu) 261 return -ENOMEM; 262 263 aiu->platform = device_get_match_data(dev); 264 if (!aiu->platform) 265 return -ENODEV; 266 267 platform_set_drvdata(pdev, aiu); 268 269 ret = device_reset(dev); 270 if (ret) 271 return dev_err_probe(dev, ret, "Failed to reset device\n"); 272 273 regs = devm_platform_ioremap_resource(pdev, 0); 274 if (IS_ERR(regs)) 275 return PTR_ERR(regs); 276 277 map = devm_regmap_init_mmio(dev, regs, &aiu_regmap_cfg); 278 if (IS_ERR(map)) { 279 dev_err(dev, "failed to init regmap: %ld\n", 280 PTR_ERR(map)); 281 return PTR_ERR(map); 282 } 283 284 aiu->i2s.irq = platform_get_irq_byname(pdev, "i2s"); 285 if (aiu->i2s.irq < 0) 286 return aiu->i2s.irq; 287 288 aiu->spdif.irq = platform_get_irq_byname(pdev, "spdif"); 289 if (aiu->spdif.irq < 0) 290 return aiu->spdif.irq; 291 292 ret = aiu_clk_get(dev); 293 if (ret) 294 return ret; 295 296 /* Register the cpu component of the aiu */ 297 ret = snd_soc_register_component(dev, &aiu_cpu_component, 298 aiu_cpu_dai_drv, 299 ARRAY_SIZE(aiu_cpu_dai_drv)); 300 if (ret) { 301 dev_err(dev, "Failed to register cpu component\n"); 302 return ret; 303 } 304 305 /* Register the hdmi codec control component */ 306 ret = aiu_hdmi_ctrl_register_component(dev); 307 if (ret) { 308 dev_err(dev, "Failed to register hdmi control component\n"); 309 goto err; 310 } 311 312 /* Register the internal dac control component on gxl */ 313 if (aiu->platform->has_acodec) { 314 ret = aiu_acodec_ctrl_register_component(dev); 315 if (ret) { 316 dev_err(dev, 317 "Failed to register acodec control component\n"); 318 goto err; 319 } 320 } 321 322 return 0; 323 err: 324 snd_soc_unregister_component(dev); 325 return ret; 326 } 327 328 static void aiu_remove(struct platform_device *pdev) 329 { 330 snd_soc_unregister_component(&pdev->dev); 331 } 332 333 static const struct aiu_platform_data aiu_gxbb_pdata = { 334 .has_acodec = false, 335 .has_clk_ctrl_more_i2s_div = true, 336 }; 337 338 static const struct aiu_platform_data aiu_gxl_pdata = { 339 .has_acodec = true, 340 .has_clk_ctrl_more_i2s_div = true, 341 }; 342 343 static const struct aiu_platform_data aiu_meson8_pdata = { 344 .has_acodec = false, 345 .has_clk_ctrl_more_i2s_div = false, 346 }; 347 348 static const struct of_device_id aiu_of_match[] = { 349 { .compatible = "amlogic,aiu-gxbb", .data = &aiu_gxbb_pdata }, 350 { .compatible = "amlogic,aiu-gxl", .data = &aiu_gxl_pdata }, 351 { .compatible = "amlogic,aiu-meson8", .data = &aiu_meson8_pdata }, 352 { .compatible = "amlogic,aiu-meson8b", .data = &aiu_meson8_pdata }, 353 {} 354 }; 355 MODULE_DEVICE_TABLE(of, aiu_of_match); 356 357 static struct platform_driver aiu_pdrv = { 358 .probe = aiu_probe, 359 .remove_new = aiu_remove, 360 .driver = { 361 .name = "meson-aiu", 362 .of_match_table = aiu_of_match, 363 }, 364 }; 365 module_platform_driver(aiu_pdrv); 366 367 MODULE_DESCRIPTION("Meson AIU Driver"); 368 MODULE_AUTHOR("Jerome Brunet <jbrunet@baylibre.com>"); 369 MODULE_LICENSE("GPL v2"); 370