1 /* 2 * This driver supports the digital controls for the internal codec 3 * found in Allwinner's A33 SoCs. 4 * 5 * (C) Copyright 2010-2016 6 * Reuuimlla Technology Co., Ltd. <www.reuuimllatech.com> 7 * huangxin <huangxin@Reuuimllatech.com> 8 * Mylène Josserand <mylene.josserand@free-electrons.com> 9 * 10 * This program is free software; you can redistribute it and/or modify 11 * it under the terms of the GNU General Public License as published by 12 * the Free Software Foundation; either version 2 of the License, or 13 * (at your option) any later version. 14 * 15 * This program is distributed in the hope that it will be useful, 16 * but WITHOUT ANY WARRANTY; without even the implied warranty of 17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 18 * GNU General Public License for more details. 19 */ 20 21 #include <linux/module.h> 22 #include <linux/delay.h> 23 #include <linux/clk.h> 24 #include <linux/io.h> 25 #include <linux/pm_runtime.h> 26 #include <linux/regmap.h> 27 28 #include <sound/pcm_params.h> 29 #include <sound/soc.h> 30 #include <sound/soc-dapm.h> 31 32 #define SUN8I_SYSCLK_CTL 0x00c 33 #define SUN8I_SYSCLK_CTL_AIF1CLK_ENA 11 34 #define SUN8I_SYSCLK_CTL_AIF1CLK_SRC_PLL 9 35 #define SUN8I_SYSCLK_CTL_AIF1CLK_SRC 8 36 #define SUN8I_SYSCLK_CTL_SYSCLK_ENA 3 37 #define SUN8I_SYSCLK_CTL_SYSCLK_SRC 0 38 #define SUN8I_MOD_CLK_ENA 0x010 39 #define SUN8I_MOD_CLK_ENA_AIF1 15 40 #define SUN8I_MOD_CLK_ENA_DAC 2 41 #define SUN8I_MOD_RST_CTL 0x014 42 #define SUN8I_MOD_RST_CTL_AIF1 15 43 #define SUN8I_MOD_RST_CTL_DAC 2 44 #define SUN8I_SYS_SR_CTRL 0x018 45 #define SUN8I_SYS_SR_CTRL_AIF1_FS 12 46 #define SUN8I_SYS_SR_CTRL_AIF2_FS 8 47 #define SUN8I_AIF1CLK_CTRL 0x040 48 #define SUN8I_AIF1CLK_CTRL_AIF1_MSTR_MOD 15 49 #define SUN8I_AIF1CLK_CTRL_AIF1_BCLK_INV 14 50 #define SUN8I_AIF1CLK_CTRL_AIF1_LRCK_INV 13 51 #define SUN8I_AIF1CLK_CTRL_AIF1_BCLK_DIV 9 52 #define SUN8I_AIF1CLK_CTRL_AIF1_LRCK_DIV 6 53 #define SUN8I_AIF1CLK_CTRL_AIF1_LRCK_DIV_16 (1 << 6) 54 #define SUN8I_AIF1CLK_CTRL_AIF1_WORD_SIZ 4 55 #define SUN8I_AIF1CLK_CTRL_AIF1_WORD_SIZ_16 (1 << 4) 56 #define SUN8I_AIF1CLK_CTRL_AIF1_DATA_FMT 2 57 #define SUN8I_AIF1_DACDAT_CTRL 0x048 58 #define SUN8I_AIF1_DACDAT_CTRL_AIF1_DA0L_ENA 15 59 #define SUN8I_AIF1_DACDAT_CTRL_AIF1_DA0R_ENA 14 60 #define SUN8I_DAC_DIG_CTRL 0x120 61 #define SUN8I_DAC_DIG_CTRL_ENDA 15 62 #define SUN8I_DAC_MXR_SRC 0x130 63 #define SUN8I_DAC_MXR_SRC_DACL_MXR_SRC_AIF1DA0L 15 64 #define SUN8I_DAC_MXR_SRC_DACL_MXR_SRC_AIF1DA1L 14 65 #define SUN8I_DAC_MXR_SRC_DACL_MXR_SRC_AIF2DACL 13 66 #define SUN8I_DAC_MXR_SRC_DACL_MXR_SRC_ADCL 12 67 #define SUN8I_DAC_MXR_SRC_DACR_MXR_SRC_AIF1DA0R 11 68 #define SUN8I_DAC_MXR_SRC_DACR_MXR_SRC_AIF1DA1R 10 69 #define SUN8I_DAC_MXR_SRC_DACR_MXR_SRC_AIF2DACR 9 70 #define SUN8I_DAC_MXR_SRC_DACR_MXR_SRC_ADCR 8 71 72 #define SUN8I_SYS_SR_CTRL_AIF1_FS_MASK GENMASK(15, 12) 73 #define SUN8I_SYS_SR_CTRL_AIF2_FS_MASK GENMASK(11, 8) 74 #define SUN8I_AIF1CLK_CTRL_AIF1_WORD_SIZ_MASK GENMASK(5, 4) 75 #define SUN8I_AIF1CLK_CTRL_AIF1_LRCK_DIV_MASK GENMASK(8, 6) 76 77 struct sun8i_codec { 78 struct device *dev; 79 struct regmap *regmap; 80 struct clk *clk_module; 81 struct clk *clk_bus; 82 }; 83 84 static int sun8i_codec_runtime_resume(struct device *dev) 85 { 86 struct sun8i_codec *scodec = dev_get_drvdata(dev); 87 int ret; 88 89 ret = clk_prepare_enable(scodec->clk_module); 90 if (ret) { 91 dev_err(dev, "Failed to enable the module clock\n"); 92 return ret; 93 } 94 95 ret = clk_prepare_enable(scodec->clk_bus); 96 if (ret) { 97 dev_err(dev, "Failed to enable the bus clock\n"); 98 goto err_disable_modclk; 99 } 100 101 regcache_cache_only(scodec->regmap, false); 102 103 ret = regcache_sync(scodec->regmap); 104 if (ret) { 105 dev_err(dev, "Failed to sync regmap cache\n"); 106 goto err_disable_clk; 107 } 108 109 return 0; 110 111 err_disable_clk: 112 clk_disable_unprepare(scodec->clk_bus); 113 114 err_disable_modclk: 115 clk_disable_unprepare(scodec->clk_module); 116 117 return ret; 118 } 119 120 static int sun8i_codec_runtime_suspend(struct device *dev) 121 { 122 struct sun8i_codec *scodec = dev_get_drvdata(dev); 123 124 regcache_cache_only(scodec->regmap, true); 125 regcache_mark_dirty(scodec->regmap); 126 127 clk_disable_unprepare(scodec->clk_module); 128 clk_disable_unprepare(scodec->clk_bus); 129 130 return 0; 131 } 132 133 static int sun8i_codec_get_hw_rate(struct snd_pcm_hw_params *params) 134 { 135 unsigned int rate = params_rate(params); 136 137 switch (rate) { 138 case 8000: 139 case 7350: 140 return 0x0; 141 case 11025: 142 return 0x1; 143 case 12000: 144 return 0x2; 145 case 16000: 146 return 0x3; 147 case 22050: 148 return 0x4; 149 case 24000: 150 return 0x5; 151 case 32000: 152 return 0x6; 153 case 44100: 154 return 0x7; 155 case 48000: 156 return 0x8; 157 case 96000: 158 return 0x9; 159 case 192000: 160 return 0xa; 161 default: 162 return -EINVAL; 163 } 164 } 165 166 static int sun8i_set_fmt(struct snd_soc_dai *dai, unsigned int fmt) 167 { 168 struct sun8i_codec *scodec = snd_soc_codec_get_drvdata(dai->codec); 169 u32 value; 170 171 /* clock masters */ 172 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) { 173 case SND_SOC_DAIFMT_CBS_CFS: /* DAI Slave */ 174 value = 0x0; /* Codec Master */ 175 break; 176 case SND_SOC_DAIFMT_CBM_CFM: /* DAI Master */ 177 value = 0x1; /* Codec Slave */ 178 break; 179 default: 180 return -EINVAL; 181 } 182 regmap_update_bits(scodec->regmap, SUN8I_AIF1CLK_CTRL, 183 BIT(SUN8I_AIF1CLK_CTRL_AIF1_MSTR_MOD), 184 value << SUN8I_AIF1CLK_CTRL_AIF1_MSTR_MOD); 185 186 /* clock inversion */ 187 switch (fmt & SND_SOC_DAIFMT_INV_MASK) { 188 case SND_SOC_DAIFMT_NB_NF: /* Normal */ 189 value = 0x0; 190 break; 191 case SND_SOC_DAIFMT_IB_IF: /* Inversion */ 192 value = 0x1; 193 break; 194 default: 195 return -EINVAL; 196 } 197 regmap_update_bits(scodec->regmap, SUN8I_AIF1CLK_CTRL, 198 BIT(SUN8I_AIF1CLK_CTRL_AIF1_BCLK_INV), 199 value << SUN8I_AIF1CLK_CTRL_AIF1_BCLK_INV); 200 regmap_update_bits(scodec->regmap, SUN8I_AIF1CLK_CTRL, 201 BIT(SUN8I_AIF1CLK_CTRL_AIF1_LRCK_INV), 202 value << SUN8I_AIF1CLK_CTRL_AIF1_LRCK_INV); 203 204 /* DAI format */ 205 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { 206 case SND_SOC_DAIFMT_I2S: 207 value = 0x0; 208 break; 209 case SND_SOC_DAIFMT_LEFT_J: 210 value = 0x1; 211 break; 212 case SND_SOC_DAIFMT_RIGHT_J: 213 value = 0x2; 214 break; 215 case SND_SOC_DAIFMT_DSP_A: 216 case SND_SOC_DAIFMT_DSP_B: 217 value = 0x3; 218 break; 219 default: 220 return -EINVAL; 221 } 222 regmap_update_bits(scodec->regmap, SUN8I_AIF1CLK_CTRL, 223 BIT(SUN8I_AIF1CLK_CTRL_AIF1_DATA_FMT), 224 value << SUN8I_AIF1CLK_CTRL_AIF1_DATA_FMT); 225 226 return 0; 227 } 228 229 static int sun8i_codec_hw_params(struct snd_pcm_substream *substream, 230 struct snd_pcm_hw_params *params, 231 struct snd_soc_dai *dai) 232 { 233 struct sun8i_codec *scodec = snd_soc_codec_get_drvdata(dai->codec); 234 int sample_rate; 235 236 /* 237 * The CPU DAI handles only a sample of 16 bits. Configure the 238 * codec to handle this type of sample resolution. 239 */ 240 regmap_update_bits(scodec->regmap, SUN8I_AIF1CLK_CTRL, 241 SUN8I_AIF1CLK_CTRL_AIF1_WORD_SIZ_MASK, 242 SUN8I_AIF1CLK_CTRL_AIF1_WORD_SIZ_16); 243 244 regmap_update_bits(scodec->regmap, SUN8I_AIF1CLK_CTRL, 245 SUN8I_AIF1CLK_CTRL_AIF1_LRCK_DIV_MASK, 246 SUN8I_AIF1CLK_CTRL_AIF1_LRCK_DIV_16); 247 248 sample_rate = sun8i_codec_get_hw_rate(params); 249 if (sample_rate < 0) 250 return sample_rate; 251 252 regmap_update_bits(scodec->regmap, SUN8I_SYS_SR_CTRL, 253 SUN8I_SYS_SR_CTRL_AIF1_FS_MASK, 254 sample_rate << SUN8I_SYS_SR_CTRL_AIF1_FS); 255 regmap_update_bits(scodec->regmap, SUN8I_SYS_SR_CTRL, 256 SUN8I_SYS_SR_CTRL_AIF2_FS_MASK, 257 sample_rate << SUN8I_SYS_SR_CTRL_AIF2_FS); 258 259 return 0; 260 } 261 262 static const struct snd_kcontrol_new sun8i_dac_mixer_controls[] = { 263 SOC_DAPM_DOUBLE("AIF1 Slot 0 Digital DAC Playback Switch", 264 SUN8I_DAC_MXR_SRC, 265 SUN8I_DAC_MXR_SRC_DACL_MXR_SRC_AIF1DA0L, 266 SUN8I_DAC_MXR_SRC_DACR_MXR_SRC_AIF1DA0R, 1, 0), 267 SOC_DAPM_DOUBLE("AIF1 Slot 1 Digital DAC Playback Switch", 268 SUN8I_DAC_MXR_SRC, 269 SUN8I_DAC_MXR_SRC_DACL_MXR_SRC_AIF1DA1L, 270 SUN8I_DAC_MXR_SRC_DACR_MXR_SRC_AIF1DA1R, 1, 0), 271 SOC_DAPM_DOUBLE("AIF2 Digital DAC Playback Switch", SUN8I_DAC_MXR_SRC, 272 SUN8I_DAC_MXR_SRC_DACL_MXR_SRC_AIF2DACL, 273 SUN8I_DAC_MXR_SRC_DACR_MXR_SRC_AIF2DACR, 1, 0), 274 SOC_DAPM_DOUBLE("ADC Digital DAC Playback Switch", SUN8I_DAC_MXR_SRC, 275 SUN8I_DAC_MXR_SRC_DACL_MXR_SRC_ADCL, 276 SUN8I_DAC_MXR_SRC_DACR_MXR_SRC_ADCR, 1, 0), 277 }; 278 279 static const struct snd_soc_dapm_widget sun8i_codec_dapm_widgets[] = { 280 /* Digital parts of the DACs */ 281 SND_SOC_DAPM_SUPPLY("DAC", SUN8I_DAC_DIG_CTRL, SUN8I_DAC_DIG_CTRL_ENDA, 282 0, NULL, 0), 283 284 /* Analog DAC AIF */ 285 SND_SOC_DAPM_AIF_IN("AIF1 Slot 0 Left", "Playback", 0, 286 SUN8I_AIF1_DACDAT_CTRL, 287 SUN8I_AIF1_DACDAT_CTRL_AIF1_DA0L_ENA, 0), 288 SND_SOC_DAPM_AIF_IN("AIF1 Slot 0 Right", "Playback", 0, 289 SUN8I_AIF1_DACDAT_CTRL, 290 SUN8I_AIF1_DACDAT_CTRL_AIF1_DA0R_ENA, 0), 291 292 /* DAC Mixers */ 293 SOC_MIXER_ARRAY("Left Digital DAC Mixer", SND_SOC_NOPM, 0, 0, 294 sun8i_dac_mixer_controls), 295 SOC_MIXER_ARRAY("Right Digital DAC Mixer", SND_SOC_NOPM, 0, 0, 296 sun8i_dac_mixer_controls), 297 298 /* Clocks */ 299 SND_SOC_DAPM_SUPPLY("MODCLK AFI1", SUN8I_MOD_CLK_ENA, 300 SUN8I_MOD_CLK_ENA_AIF1, 0, NULL, 0), 301 SND_SOC_DAPM_SUPPLY("MODCLK DAC", SUN8I_MOD_CLK_ENA, 302 SUN8I_MOD_CLK_ENA_DAC, 0, NULL, 0), 303 SND_SOC_DAPM_SUPPLY("AIF1", SUN8I_SYSCLK_CTL, 304 SUN8I_SYSCLK_CTL_AIF1CLK_ENA, 0, NULL, 0), 305 SND_SOC_DAPM_SUPPLY("SYSCLK", SUN8I_SYSCLK_CTL, 306 SUN8I_SYSCLK_CTL_SYSCLK_ENA, 0, NULL, 0), 307 308 SND_SOC_DAPM_SUPPLY("AIF1 PLL", SUN8I_SYSCLK_CTL, 309 SUN8I_SYSCLK_CTL_AIF1CLK_SRC_PLL, 0, NULL, 0), 310 /* Inversion as 0=AIF1, 1=AIF2 */ 311 SND_SOC_DAPM_SUPPLY("SYSCLK AIF1", SUN8I_SYSCLK_CTL, 312 SUN8I_SYSCLK_CTL_SYSCLK_SRC, 1, NULL, 0), 313 314 /* Module reset */ 315 SND_SOC_DAPM_SUPPLY("RST AIF1", SUN8I_MOD_RST_CTL, 316 SUN8I_MOD_RST_CTL_AIF1, 0, NULL, 0), 317 SND_SOC_DAPM_SUPPLY("RST DAC", SUN8I_MOD_RST_CTL, 318 SUN8I_MOD_RST_CTL_DAC, 0, NULL, 0), 319 }; 320 321 static const struct snd_soc_dapm_route sun8i_codec_dapm_routes[] = { 322 /* Clock Routes */ 323 { "AIF1", NULL, "SYSCLK AIF1" }, 324 { "AIF1 PLL", NULL, "AIF1" }, 325 { "RST AIF1", NULL, "AIF1 PLL" }, 326 { "MODCLK AFI1", NULL, "RST AIF1" }, 327 { "DAC", NULL, "MODCLK AFI1" }, 328 329 { "RST DAC", NULL, "SYSCLK" }, 330 { "MODCLK DAC", NULL, "RST DAC" }, 331 { "DAC", NULL, "MODCLK DAC" }, 332 333 /* DAC Routes */ 334 { "AIF1 Slot 0 Right", NULL, "DAC" }, 335 { "AIF1 Slot 0 Left", NULL, "DAC" }, 336 337 /* DAC Mixer Routes */ 338 { "Left Digital DAC Mixer", "AIF1 Slot 0 Digital DAC Playback Switch", 339 "AIF1 Slot 0 Left"}, 340 { "Right Digital DAC Mixer", "AIF1 Slot 0 Digital DAC Playback Switch", 341 "AIF1 Slot 0 Right"}, 342 }; 343 344 static struct snd_soc_dai_ops sun8i_codec_dai_ops = { 345 .hw_params = sun8i_codec_hw_params, 346 .set_fmt = sun8i_set_fmt, 347 }; 348 349 static struct snd_soc_dai_driver sun8i_codec_dai = { 350 .name = "sun8i", 351 /* playback capabilities */ 352 .playback = { 353 .stream_name = "Playback", 354 .channels_min = 1, 355 .channels_max = 2, 356 .rates = SNDRV_PCM_RATE_8000_192000, 357 .formats = SNDRV_PCM_FMTBIT_S16_LE, 358 }, 359 /* pcm operations */ 360 .ops = &sun8i_codec_dai_ops, 361 }; 362 363 static struct snd_soc_codec_driver sun8i_soc_codec = { 364 .component_driver = { 365 .dapm_widgets = sun8i_codec_dapm_widgets, 366 .num_dapm_widgets = ARRAY_SIZE(sun8i_codec_dapm_widgets), 367 .dapm_routes = sun8i_codec_dapm_routes, 368 .num_dapm_routes = ARRAY_SIZE(sun8i_codec_dapm_routes), 369 }, 370 }; 371 372 static const struct regmap_config sun8i_codec_regmap_config = { 373 .reg_bits = 32, 374 .reg_stride = 4, 375 .val_bits = 32, 376 .max_register = SUN8I_DAC_MXR_SRC, 377 378 .cache_type = REGCACHE_FLAT, 379 }; 380 381 static int sun8i_codec_probe(struct platform_device *pdev) 382 { 383 struct resource *res_base; 384 struct sun8i_codec *scodec; 385 void __iomem *base; 386 int ret; 387 388 scodec = devm_kzalloc(&pdev->dev, sizeof(*scodec), GFP_KERNEL); 389 if (!scodec) 390 return -ENOMEM; 391 392 scodec->dev = &pdev->dev; 393 394 scodec->clk_module = devm_clk_get(&pdev->dev, "mod"); 395 if (IS_ERR(scodec->clk_module)) { 396 dev_err(&pdev->dev, "Failed to get the module clock\n"); 397 return PTR_ERR(scodec->clk_module); 398 } 399 400 scodec->clk_bus = devm_clk_get(&pdev->dev, "bus"); 401 if (IS_ERR(scodec->clk_bus)) { 402 dev_err(&pdev->dev, "Failed to get the bus clock\n"); 403 return PTR_ERR(scodec->clk_bus); 404 } 405 406 res_base = platform_get_resource(pdev, IORESOURCE_MEM, 0); 407 base = devm_ioremap_resource(&pdev->dev, res_base); 408 if (IS_ERR(base)) { 409 dev_err(&pdev->dev, "Failed to map the registers\n"); 410 return PTR_ERR(base); 411 } 412 413 scodec->regmap = devm_regmap_init_mmio(&pdev->dev, base, 414 &sun8i_codec_regmap_config); 415 if (IS_ERR(scodec->regmap)) { 416 dev_err(&pdev->dev, "Failed to create our regmap\n"); 417 return PTR_ERR(scodec->regmap); 418 } 419 420 platform_set_drvdata(pdev, scodec); 421 422 pm_runtime_enable(&pdev->dev); 423 if (!pm_runtime_enabled(&pdev->dev)) { 424 ret = sun8i_codec_runtime_resume(&pdev->dev); 425 if (ret) 426 goto err_pm_disable; 427 } 428 429 ret = snd_soc_register_codec(&pdev->dev, &sun8i_soc_codec, 430 &sun8i_codec_dai, 1); 431 if (ret) { 432 dev_err(&pdev->dev, "Failed to register codec\n"); 433 goto err_suspend; 434 } 435 436 return ret; 437 438 err_suspend: 439 if (!pm_runtime_status_suspended(&pdev->dev)) 440 sun8i_codec_runtime_suspend(&pdev->dev); 441 442 err_pm_disable: 443 pm_runtime_disable(&pdev->dev); 444 445 return ret; 446 } 447 448 static int sun8i_codec_remove(struct platform_device *pdev) 449 { 450 struct snd_soc_card *card = platform_get_drvdata(pdev); 451 struct sun8i_codec *scodec = snd_soc_card_get_drvdata(card); 452 453 pm_runtime_disable(&pdev->dev); 454 if (!pm_runtime_status_suspended(&pdev->dev)) 455 sun8i_codec_runtime_suspend(&pdev->dev); 456 457 snd_soc_unregister_codec(&pdev->dev); 458 clk_disable_unprepare(scodec->clk_module); 459 clk_disable_unprepare(scodec->clk_bus); 460 461 return 0; 462 } 463 464 static const struct of_device_id sun8i_codec_of_match[] = { 465 { .compatible = "allwinner,sun8i-a33-codec" }, 466 {} 467 }; 468 MODULE_DEVICE_TABLE(of, sun8i_codec_of_match); 469 470 static const struct dev_pm_ops sun8i_codec_pm_ops = { 471 SET_RUNTIME_PM_OPS(sun8i_codec_runtime_suspend, 472 sun8i_codec_runtime_resume, NULL) 473 }; 474 475 static struct platform_driver sun8i_codec_driver = { 476 .driver = { 477 .name = "sun8i-codec", 478 .of_match_table = sun8i_codec_of_match, 479 .pm = &sun8i_codec_pm_ops, 480 }, 481 .probe = sun8i_codec_probe, 482 .remove = sun8i_codec_remove, 483 }; 484 module_platform_driver(sun8i_codec_driver); 485 486 MODULE_DESCRIPTION("Allwinner A33 (sun8i) codec driver"); 487 MODULE_AUTHOR("Mylène Josserand <mylene.josserand@free-electrons.com>"); 488 MODULE_LICENSE("GPL"); 489 MODULE_ALIAS("platform:sun8i-codec"); 490