1 // SPDX-License-Identifier: GPL-2.0-only 2 // 3 // tegra210_ope.c - Tegra210 OPE driver 4 // 5 // Copyright (c) 2022, NVIDIA CORPORATION. All rights reserved. 6 7 #include <linux/clk.h> 8 #include <linux/device.h> 9 #include <linux/io.h> 10 #include <linux/mod_devicetable.h> 11 #include <linux/module.h> 12 #include <linux/platform_device.h> 13 #include <linux/pm_runtime.h> 14 #include <linux/regmap.h> 15 #include <sound/core.h> 16 #include <sound/pcm.h> 17 #include <sound/pcm_params.h> 18 #include <sound/soc.h> 19 20 #include "tegra210_mbdrc.h" 21 #include "tegra210_ope.h" 22 #include "tegra210_peq.h" 23 #include "tegra_cif.h" 24 25 static const struct reg_default tegra210_ope_reg_defaults[] = { 26 { TEGRA210_OPE_RX_INT_MASK, 0x00000001}, 27 { TEGRA210_OPE_RX_CIF_CTRL, 0x00007700}, 28 { TEGRA210_OPE_TX_INT_MASK, 0x00000001}, 29 { TEGRA210_OPE_TX_CIF_CTRL, 0x00007700}, 30 { TEGRA210_OPE_CG, 0x1}, 31 }; 32 33 static int tegra210_ope_set_audio_cif(struct tegra210_ope *ope, 34 struct snd_pcm_hw_params *params, 35 unsigned int reg) 36 { 37 int channels, audio_bits; 38 struct tegra_cif_conf cif_conf; 39 40 memset(&cif_conf, 0, sizeof(struct tegra_cif_conf)); 41 42 channels = params_channels(params); 43 if (channels < 2) 44 return -EINVAL; 45 46 switch (params_format(params)) { 47 case SNDRV_PCM_FORMAT_S16_LE: 48 audio_bits = TEGRA_ACIF_BITS_16; 49 break; 50 case SNDRV_PCM_FORMAT_S32_LE: 51 audio_bits = TEGRA_ACIF_BITS_32; 52 break; 53 default: 54 return -EINVAL; 55 } 56 57 cif_conf.audio_ch = channels; 58 cif_conf.client_ch = channels; 59 cif_conf.audio_bits = audio_bits; 60 cif_conf.client_bits = audio_bits; 61 62 tegra_set_cif(ope->regmap, reg, &cif_conf); 63 64 return 0; 65 } 66 67 static int tegra210_ope_hw_params(struct snd_pcm_substream *substream, 68 struct snd_pcm_hw_params *params, 69 struct snd_soc_dai *dai) 70 { 71 struct device *dev = dai->dev; 72 struct tegra210_ope *ope = snd_soc_dai_get_drvdata(dai); 73 int err; 74 75 /* Set RX and TX CIF */ 76 err = tegra210_ope_set_audio_cif(ope, params, 77 TEGRA210_OPE_RX_CIF_CTRL); 78 if (err) { 79 dev_err(dev, "Can't set OPE RX CIF: %d\n", err); 80 return err; 81 } 82 83 err = tegra210_ope_set_audio_cif(ope, params, 84 TEGRA210_OPE_TX_CIF_CTRL); 85 if (err) { 86 dev_err(dev, "Can't set OPE TX CIF: %d\n", err); 87 return err; 88 } 89 90 tegra210_mbdrc_hw_params(dai->component); 91 92 return err; 93 } 94 95 static int tegra210_ope_component_probe(struct snd_soc_component *cmpnt) 96 { 97 struct tegra210_ope *ope = dev_get_drvdata(cmpnt->dev); 98 99 tegra210_peq_component_init(cmpnt); 100 tegra210_mbdrc_component_init(cmpnt); 101 102 /* 103 * The OPE, PEQ and MBDRC functionalities are combined under one 104 * device registered by OPE driver. In fact OPE HW block includes 105 * sub blocks PEQ and MBDRC. However driver registers separate 106 * regmap interfaces for each of these. ASoC core depends on 107 * dev_get_regmap() to populate the regmap field for a given ASoC 108 * component. A component can have one regmap reference and since 109 * the DAPM routes depend on OPE regmap only, below explicit 110 * assignment is done to highlight this. This is needed for ASoC 111 * core to access correct regmap during DAPM path setup. 112 */ 113 snd_soc_component_init_regmap(cmpnt, ope->regmap); 114 115 return 0; 116 } 117 118 static const struct snd_soc_dai_ops tegra210_ope_dai_ops = { 119 .hw_params = tegra210_ope_hw_params, 120 }; 121 122 static struct snd_soc_dai_driver tegra210_ope_dais[] = { 123 { 124 .name = "OPE-RX-CIF", 125 .playback = { 126 .stream_name = "RX-CIF-Playback", 127 .channels_min = 1, 128 .channels_max = 8, 129 .rates = SNDRV_PCM_RATE_8000_192000, 130 .formats = SNDRV_PCM_FMTBIT_S8 | 131 SNDRV_PCM_FMTBIT_S16_LE | 132 SNDRV_PCM_FMTBIT_S32_LE, 133 }, 134 .capture = { 135 .stream_name = "RX-CIF-Capture", 136 .channels_min = 1, 137 .channels_max = 8, 138 .rates = SNDRV_PCM_RATE_8000_192000, 139 .formats = SNDRV_PCM_FMTBIT_S8 | 140 SNDRV_PCM_FMTBIT_S16_LE | 141 SNDRV_PCM_FMTBIT_S32_LE, 142 }, 143 }, 144 { 145 .name = "OPE-TX-CIF", 146 .playback = { 147 .stream_name = "TX-CIF-Playback", 148 .channels_min = 1, 149 .channels_max = 8, 150 .rates = SNDRV_PCM_RATE_8000_192000, 151 .formats = SNDRV_PCM_FMTBIT_S8 | 152 SNDRV_PCM_FMTBIT_S16_LE | 153 SNDRV_PCM_FMTBIT_S32_LE, 154 }, 155 .capture = { 156 .stream_name = "TX-CIF-Capture", 157 .channels_min = 1, 158 .channels_max = 8, 159 .rates = SNDRV_PCM_RATE_8000_192000, 160 .formats = SNDRV_PCM_FMTBIT_S8 | 161 SNDRV_PCM_FMTBIT_S16_LE | 162 SNDRV_PCM_FMTBIT_S32_LE, 163 }, 164 .ops = &tegra210_ope_dai_ops, 165 } 166 }; 167 168 static const struct snd_soc_dapm_widget tegra210_ope_widgets[] = { 169 SND_SOC_DAPM_AIF_IN("RX", NULL, 0, SND_SOC_NOPM, 0, 0), 170 SND_SOC_DAPM_AIF_OUT("TX", NULL, 0, TEGRA210_OPE_ENABLE, 171 TEGRA210_OPE_EN_SHIFT, 0), 172 }; 173 174 #define OPE_ROUTES(sname) \ 175 { "RX XBAR-" sname, NULL, "XBAR-TX" }, \ 176 { "RX-CIF-" sname, NULL, "RX XBAR-" sname }, \ 177 { "RX", NULL, "RX-CIF-" sname }, \ 178 { "TX-CIF-" sname, NULL, "TX" }, \ 179 { "TX XBAR-" sname, NULL, "TX-CIF-" sname }, \ 180 { "XBAR-RX", NULL, "TX XBAR-" sname } 181 182 static const struct snd_soc_dapm_route tegra210_ope_routes[] = { 183 { "TX", NULL, "RX" }, 184 OPE_ROUTES("Playback"), 185 OPE_ROUTES("Capture"), 186 }; 187 188 static const char * const tegra210_ope_data_dir_text[] = { 189 "MBDRC to PEQ", 190 "PEQ to MBDRC" 191 }; 192 193 static const struct soc_enum tegra210_ope_data_dir_enum = 194 SOC_ENUM_SINGLE(TEGRA210_OPE_DIR, TEGRA210_OPE_DIR_SHIFT, 195 2, tegra210_ope_data_dir_text); 196 197 static int tegra210_ope_get_data_dir(struct snd_kcontrol *kcontrol, 198 struct snd_ctl_elem_value *ucontrol) 199 { 200 struct snd_soc_component *cmpnt = snd_soc_kcontrol_component(kcontrol); 201 struct tegra210_ope *ope = snd_soc_component_get_drvdata(cmpnt); 202 203 ucontrol->value.enumerated.item[0] = ope->data_dir; 204 205 return 0; 206 } 207 208 static int tegra210_ope_put_data_dir(struct snd_kcontrol *kcontrol, 209 struct snd_ctl_elem_value *ucontrol) 210 { 211 struct snd_soc_component *cmpnt = snd_soc_kcontrol_component(kcontrol); 212 struct tegra210_ope *ope = snd_soc_component_get_drvdata(cmpnt); 213 unsigned int value = ucontrol->value.enumerated.item[0]; 214 215 if (value == ope->data_dir) 216 return 0; 217 218 ope->data_dir = value; 219 220 return 1; 221 } 222 223 static const struct snd_kcontrol_new tegra210_ope_controls[] = { 224 SOC_ENUM_EXT("Data Flow Direction", tegra210_ope_data_dir_enum, 225 tegra210_ope_get_data_dir, tegra210_ope_put_data_dir), 226 }; 227 228 static const struct snd_soc_component_driver tegra210_ope_cmpnt = { 229 .probe = tegra210_ope_component_probe, 230 .dapm_widgets = tegra210_ope_widgets, 231 .num_dapm_widgets = ARRAY_SIZE(tegra210_ope_widgets), 232 .dapm_routes = tegra210_ope_routes, 233 .num_dapm_routes = ARRAY_SIZE(tegra210_ope_routes), 234 .controls = tegra210_ope_controls, 235 .num_controls = ARRAY_SIZE(tegra210_ope_controls), 236 }; 237 238 static bool tegra210_ope_wr_reg(struct device *dev, unsigned int reg) 239 { 240 switch (reg) { 241 case TEGRA210_OPE_RX_INT_MASK ... TEGRA210_OPE_RX_CIF_CTRL: 242 case TEGRA210_OPE_TX_INT_MASK ... TEGRA210_OPE_TX_CIF_CTRL: 243 case TEGRA210_OPE_ENABLE ... TEGRA210_OPE_CG: 244 case TEGRA210_OPE_DIR: 245 return true; 246 default: 247 return false; 248 } 249 } 250 251 static bool tegra210_ope_rd_reg(struct device *dev, unsigned int reg) 252 { 253 if (tegra210_ope_wr_reg(dev, reg)) 254 return true; 255 256 switch (reg) { 257 case TEGRA210_OPE_RX_STATUS: 258 case TEGRA210_OPE_RX_INT_STATUS: 259 case TEGRA210_OPE_TX_STATUS: 260 case TEGRA210_OPE_TX_INT_STATUS: 261 case TEGRA210_OPE_STATUS: 262 case TEGRA210_OPE_INT_STATUS: 263 return true; 264 default: 265 return false; 266 } 267 } 268 269 static bool tegra210_ope_volatile_reg(struct device *dev, unsigned int reg) 270 { 271 switch (reg) { 272 case TEGRA210_OPE_RX_STATUS: 273 case TEGRA210_OPE_RX_INT_STATUS: 274 case TEGRA210_OPE_TX_STATUS: 275 case TEGRA210_OPE_TX_INT_STATUS: 276 case TEGRA210_OPE_SOFT_RESET: 277 case TEGRA210_OPE_STATUS: 278 case TEGRA210_OPE_INT_STATUS: 279 return true; 280 default: 281 return false; 282 } 283 } 284 285 static const struct regmap_config tegra210_ope_regmap_config = { 286 .reg_bits = 32, 287 .reg_stride = 4, 288 .val_bits = 32, 289 .max_register = TEGRA210_OPE_DIR, 290 .writeable_reg = tegra210_ope_wr_reg, 291 .readable_reg = tegra210_ope_rd_reg, 292 .volatile_reg = tegra210_ope_volatile_reg, 293 .reg_defaults = tegra210_ope_reg_defaults, 294 .num_reg_defaults = ARRAY_SIZE(tegra210_ope_reg_defaults), 295 .cache_type = REGCACHE_FLAT, 296 }; 297 298 static int tegra210_ope_probe(struct platform_device *pdev) 299 { 300 struct device *dev = &pdev->dev; 301 struct tegra210_ope *ope; 302 void __iomem *regs; 303 int err; 304 305 ope = devm_kzalloc(dev, sizeof(*ope), GFP_KERNEL); 306 if (!ope) 307 return -ENOMEM; 308 309 regs = devm_platform_ioremap_resource(pdev, 0); 310 if (IS_ERR(regs)) 311 return PTR_ERR(regs); 312 313 ope->regmap = devm_regmap_init_mmio(dev, regs, 314 &tegra210_ope_regmap_config); 315 if (IS_ERR(ope->regmap)) { 316 dev_err(dev, "regmap init failed\n"); 317 return PTR_ERR(ope->regmap); 318 } 319 320 regcache_cache_only(ope->regmap, true); 321 322 dev_set_drvdata(dev, ope); 323 324 err = tegra210_peq_regmap_init(pdev); 325 if (err < 0) { 326 dev_err(dev, "PEQ init failed\n"); 327 return err; 328 } 329 330 err = tegra210_mbdrc_regmap_init(pdev); 331 if (err < 0) { 332 dev_err(dev, "MBDRC init failed\n"); 333 return err; 334 } 335 336 err = devm_snd_soc_register_component(dev, &tegra210_ope_cmpnt, 337 tegra210_ope_dais, 338 ARRAY_SIZE(tegra210_ope_dais)); 339 if (err) { 340 dev_err(dev, "can't register OPE component, err: %d\n", err); 341 return err; 342 } 343 344 pm_runtime_enable(dev); 345 346 return 0; 347 } 348 349 static void tegra210_ope_remove(struct platform_device *pdev) 350 { 351 pm_runtime_disable(&pdev->dev); 352 } 353 354 static int __maybe_unused tegra210_ope_runtime_suspend(struct device *dev) 355 { 356 struct tegra210_ope *ope = dev_get_drvdata(dev); 357 358 tegra210_peq_save(ope->peq_regmap, ope->peq_biquad_gains, 359 ope->peq_biquad_shifts); 360 361 regcache_cache_only(ope->mbdrc_regmap, true); 362 regcache_cache_only(ope->peq_regmap, true); 363 regcache_cache_only(ope->regmap, true); 364 365 regcache_mark_dirty(ope->regmap); 366 regcache_mark_dirty(ope->peq_regmap); 367 regcache_mark_dirty(ope->mbdrc_regmap); 368 369 return 0; 370 } 371 372 static int __maybe_unused tegra210_ope_runtime_resume(struct device *dev) 373 { 374 struct tegra210_ope *ope = dev_get_drvdata(dev); 375 376 regcache_cache_only(ope->regmap, false); 377 regcache_cache_only(ope->peq_regmap, false); 378 regcache_cache_only(ope->mbdrc_regmap, false); 379 380 regcache_sync(ope->regmap); 381 regcache_sync(ope->peq_regmap); 382 regcache_sync(ope->mbdrc_regmap); 383 384 tegra210_peq_restore(ope->peq_regmap, ope->peq_biquad_gains, 385 ope->peq_biquad_shifts); 386 387 return 0; 388 } 389 390 static const struct dev_pm_ops tegra210_ope_pm_ops = { 391 SET_RUNTIME_PM_OPS(tegra210_ope_runtime_suspend, 392 tegra210_ope_runtime_resume, NULL) 393 SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend, 394 pm_runtime_force_resume) 395 }; 396 397 static const struct of_device_id tegra210_ope_of_match[] = { 398 { .compatible = "nvidia,tegra210-ope" }, 399 {}, 400 }; 401 MODULE_DEVICE_TABLE(of, tegra210_ope_of_match); 402 403 static struct platform_driver tegra210_ope_driver = { 404 .driver = { 405 .name = "tegra210-ope", 406 .of_match_table = tegra210_ope_of_match, 407 .pm = &tegra210_ope_pm_ops, 408 }, 409 .probe = tegra210_ope_probe, 410 .remove = tegra210_ope_remove, 411 }; 412 module_platform_driver(tegra210_ope_driver) 413 414 MODULE_AUTHOR("Sumit Bhattacharya <sumitb@nvidia.com>"); 415 MODULE_DESCRIPTION("Tegra210 OPE ASoC driver"); 416 MODULE_LICENSE("GPL"); 417