1 /* 2 * Wolfson WM97xx -- Core device 3 * 4 * Copyright (C) 2017 Robert Jarzmik 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License as published by 8 * the Free Software Foundation; either version 2 of the License, or 9 * (at your option) any later version. 10 * 11 * Features: 12 * - an AC97 audio codec 13 * - a touchscreen driver 14 * - a GPIO block 15 */ 16 17 #include <linux/device.h> 18 #include <linux/mfd/core.h> 19 #include <linux/mfd/wm97xx.h> 20 #include <linux/module.h> 21 #include <linux/regmap.h> 22 #include <linux/slab.h> 23 #include <linux/wm97xx.h> 24 #include <sound/ac97/codec.h> 25 #include <sound/ac97/compat.h> 26 27 #define WM9705_VENDOR_ID 0x574d4c05 28 #define WM9712_VENDOR_ID 0x574d4c12 29 #define WM9713_VENDOR_ID 0x574d4c13 30 #define WM97xx_VENDOR_ID_MASK 0xffffffff 31 32 struct wm97xx_priv { 33 struct regmap *regmap; 34 struct snd_ac97 *ac97; 35 struct device *dev; 36 struct wm97xx_platform_data codec_pdata; 37 }; 38 39 static bool wm97xx_readable_reg(struct device *dev, unsigned int reg) 40 { 41 switch (reg) { 42 case AC97_RESET ... AC97_PCM_SURR_DAC_RATE: 43 case AC97_PCM_LR_ADC_RATE: 44 case AC97_CENTER_LFE_MASTER: 45 case AC97_SPDIF ... AC97_LINE1_LEVEL: 46 case AC97_GPIO_CFG ... 0x5c: 47 case AC97_CODEC_CLASS_REV ... AC97_PCI_SID: 48 case 0x74 ... AC97_VENDOR_ID2: 49 return true; 50 default: 51 return false; 52 } 53 } 54 55 static bool wm97xx_writeable_reg(struct device *dev, unsigned int reg) 56 { 57 switch (reg) { 58 case AC97_VENDOR_ID1: 59 case AC97_VENDOR_ID2: 60 return false; 61 default: 62 return wm97xx_readable_reg(dev, reg); 63 } 64 } 65 66 static const struct reg_default wm9705_reg_defaults[] = { 67 { 0x02, 0x8000 }, 68 { 0x04, 0x8000 }, 69 { 0x06, 0x8000 }, 70 { 0x0a, 0x8000 }, 71 { 0x0c, 0x8008 }, 72 { 0x0e, 0x8008 }, 73 { 0x10, 0x8808 }, 74 { 0x12, 0x8808 }, 75 { 0x14, 0x8808 }, 76 { 0x16, 0x8808 }, 77 { 0x18, 0x8808 }, 78 { 0x1a, 0x0000 }, 79 { 0x1c, 0x8000 }, 80 { 0x20, 0x0000 }, 81 { 0x22, 0x0000 }, 82 { 0x26, 0x000f }, 83 { 0x28, 0x0605 }, 84 { 0x2a, 0x0000 }, 85 { 0x2c, 0xbb80 }, 86 { 0x32, 0xbb80 }, 87 { 0x34, 0x2000 }, 88 { 0x5a, 0x0000 }, 89 { 0x5c, 0x0000 }, 90 { 0x72, 0x0808 }, 91 { 0x74, 0x0000 }, 92 { 0x76, 0x0006 }, 93 { 0x78, 0x0000 }, 94 { 0x7a, 0x0000 }, 95 }; 96 97 static const struct regmap_config wm9705_regmap_config = { 98 .reg_bits = 16, 99 .reg_stride = 2, 100 .val_bits = 16, 101 .max_register = 0x7e, 102 .cache_type = REGCACHE_RBTREE, 103 104 .reg_defaults = wm9705_reg_defaults, 105 .num_reg_defaults = ARRAY_SIZE(wm9705_reg_defaults), 106 .volatile_reg = regmap_ac97_default_volatile, 107 .readable_reg = wm97xx_readable_reg, 108 .writeable_reg = wm97xx_writeable_reg, 109 }; 110 111 static struct mfd_cell wm9705_cells[] = { 112 { .name = "wm9705-codec", }, 113 { .name = "wm97xx-ts", }, 114 }; 115 116 static bool wm9712_volatile_reg(struct device *dev, unsigned int reg) 117 { 118 switch (reg) { 119 case AC97_REC_GAIN: 120 return true; 121 default: 122 return regmap_ac97_default_volatile(dev, reg); 123 } 124 } 125 126 static const struct reg_default wm9712_reg_defaults[] = { 127 { 0x02, 0x8000 }, 128 { 0x04, 0x8000 }, 129 { 0x06, 0x8000 }, 130 { 0x08, 0x0f0f }, 131 { 0x0a, 0xaaa0 }, 132 { 0x0c, 0xc008 }, 133 { 0x0e, 0x6808 }, 134 { 0x10, 0xe808 }, 135 { 0x12, 0xaaa0 }, 136 { 0x14, 0xad00 }, 137 { 0x16, 0x8000 }, 138 { 0x18, 0xe808 }, 139 { 0x1a, 0x3000 }, 140 { 0x1c, 0x8000 }, 141 { 0x20, 0x0000 }, 142 { 0x22, 0x0000 }, 143 { 0x26, 0x000f }, 144 { 0x28, 0x0605 }, 145 { 0x2a, 0x0410 }, 146 { 0x2c, 0xbb80 }, 147 { 0x2e, 0xbb80 }, 148 { 0x32, 0xbb80 }, 149 { 0x34, 0x2000 }, 150 { 0x4c, 0xf83e }, 151 { 0x4e, 0xffff }, 152 { 0x50, 0x0000 }, 153 { 0x52, 0x0000 }, 154 { 0x56, 0xf83e }, 155 { 0x58, 0x0008 }, 156 { 0x5c, 0x0000 }, 157 { 0x60, 0xb032 }, 158 { 0x62, 0x3e00 }, 159 { 0x64, 0x0000 }, 160 { 0x76, 0x0006 }, 161 { 0x78, 0x0001 }, 162 { 0x7a, 0x0000 }, 163 }; 164 165 static const struct regmap_config wm9712_regmap_config = { 166 .reg_bits = 16, 167 .reg_stride = 2, 168 .val_bits = 16, 169 .max_register = 0x7e, 170 .cache_type = REGCACHE_RBTREE, 171 172 .reg_defaults = wm9712_reg_defaults, 173 .num_reg_defaults = ARRAY_SIZE(wm9712_reg_defaults), 174 .volatile_reg = wm9712_volatile_reg, 175 .readable_reg = wm97xx_readable_reg, 176 .writeable_reg = wm97xx_writeable_reg, 177 }; 178 179 static struct mfd_cell wm9712_cells[] = { 180 { .name = "wm9712-codec", }, 181 { .name = "wm97xx-ts", }, 182 }; 183 184 static const struct reg_default wm9713_reg_defaults[] = { 185 { 0x02, 0x8080 }, /* Speaker Output Volume */ 186 { 0x04, 0x8080 }, /* Headphone Output Volume */ 187 { 0x06, 0x8080 }, /* Out3/OUT4 Volume */ 188 { 0x08, 0xc880 }, /* Mono Volume */ 189 { 0x0a, 0xe808 }, /* LINEIN Volume */ 190 { 0x0c, 0xe808 }, /* DAC PGA Volume */ 191 { 0x0e, 0x0808 }, /* MIC PGA Volume */ 192 { 0x10, 0x00da }, /* MIC Routing Control */ 193 { 0x12, 0x8000 }, /* Record PGA Volume */ 194 { 0x14, 0xd600 }, /* Record Routing */ 195 { 0x16, 0xaaa0 }, /* PCBEEP Volume */ 196 { 0x18, 0xaaa0 }, /* VxDAC Volume */ 197 { 0x1a, 0xaaa0 }, /* AUXDAC Volume */ 198 { 0x1c, 0x0000 }, /* Output PGA Mux */ 199 { 0x1e, 0x0000 }, /* DAC 3D control */ 200 { 0x20, 0x0f0f }, /* DAC Tone Control*/ 201 { 0x22, 0x0040 }, /* MIC Input Select & Bias */ 202 { 0x24, 0x0000 }, /* Output Volume Mapping & Jack */ 203 { 0x26, 0x7f00 }, /* Powerdown Ctrl/Stat*/ 204 { 0x28, 0x0405 }, /* Extended Audio ID */ 205 { 0x2a, 0x0410 }, /* Extended Audio Start/Ctrl */ 206 { 0x2c, 0xbb80 }, /* Audio DACs Sample Rate */ 207 { 0x2e, 0xbb80 }, /* AUXDAC Sample Rate */ 208 { 0x32, 0xbb80 }, /* Audio ADCs Sample Rate */ 209 { 0x36, 0x4523 }, /* PCM codec control */ 210 { 0x3a, 0x2000 }, /* SPDIF control */ 211 { 0x3c, 0xfdff }, /* Powerdown 1 */ 212 { 0x3e, 0xffff }, /* Powerdown 2 */ 213 { 0x40, 0x0000 }, /* General Purpose */ 214 { 0x42, 0x0000 }, /* Fast Power-Up Control */ 215 { 0x44, 0x0080 }, /* MCLK/PLL Control */ 216 { 0x46, 0x0000 }, /* MCLK/PLL Control */ 217 218 { 0x4c, 0xfffe }, /* GPIO Pin Configuration */ 219 { 0x4e, 0xffff }, /* GPIO Pin Polarity / Type */ 220 { 0x50, 0x0000 }, /* GPIO Pin Sticky */ 221 { 0x52, 0x0000 }, /* GPIO Pin Wake-Up */ 222 /* GPIO Pin Status */ 223 { 0x56, 0xfffe }, /* GPIO Pin Sharing */ 224 { 0x58, 0x4000 }, /* GPIO PullUp/PullDown */ 225 { 0x5a, 0x0000 }, /* Additional Functions 1 */ 226 { 0x5c, 0x0000 }, /* Additional Functions 2 */ 227 { 0x60, 0xb032 }, /* ALC Control */ 228 { 0x62, 0x3e00 }, /* ALC / Noise Gate Control */ 229 { 0x64, 0x0000 }, /* AUXDAC input control */ 230 { 0x74, 0x0000 }, /* Digitiser Reg 1 */ 231 { 0x76, 0x0006 }, /* Digitiser Reg 2 */ 232 { 0x78, 0x0001 }, /* Digitiser Reg 3 */ 233 { 0x7a, 0x0000 }, /* Digitiser Read Back */ 234 }; 235 236 static const struct regmap_config wm9713_regmap_config = { 237 .reg_bits = 16, 238 .reg_stride = 2, 239 .val_bits = 16, 240 .max_register = 0x7e, 241 .cache_type = REGCACHE_RBTREE, 242 243 .reg_defaults = wm9713_reg_defaults, 244 .num_reg_defaults = ARRAY_SIZE(wm9713_reg_defaults), 245 .volatile_reg = regmap_ac97_default_volatile, 246 .readable_reg = wm97xx_readable_reg, 247 .writeable_reg = wm97xx_writeable_reg, 248 }; 249 250 static struct mfd_cell wm9713_cells[] = { 251 { .name = "wm9713-codec", }, 252 { .name = "wm97xx-ts", }, 253 }; 254 255 static int wm97xx_ac97_probe(struct ac97_codec_device *adev) 256 { 257 struct wm97xx_priv *wm97xx; 258 const struct regmap_config *config; 259 struct wm97xx_platform_data *codec_pdata; 260 struct mfd_cell *cells; 261 int ret = -ENODEV, nb_cells, i; 262 struct wm97xx_pdata *pdata = snd_ac97_codec_get_platdata(adev); 263 264 wm97xx = devm_kzalloc(ac97_codec_dev2dev(adev), 265 sizeof(*wm97xx), GFP_KERNEL); 266 if (!wm97xx) 267 return -ENOMEM; 268 269 wm97xx->dev = ac97_codec_dev2dev(adev); 270 wm97xx->ac97 = snd_ac97_compat_alloc(adev); 271 if (IS_ERR(wm97xx->ac97)) 272 return PTR_ERR(wm97xx->ac97); 273 274 275 ac97_set_drvdata(adev, wm97xx); 276 dev_info(wm97xx->dev, "wm97xx core found, id=0x%x\n", 277 adev->vendor_id); 278 279 codec_pdata = &wm97xx->codec_pdata; 280 codec_pdata->ac97 = wm97xx->ac97; 281 codec_pdata->batt_pdata = pdata->batt_pdata; 282 283 switch (adev->vendor_id) { 284 case WM9705_VENDOR_ID: 285 config = &wm9705_regmap_config; 286 cells = wm9705_cells; 287 nb_cells = ARRAY_SIZE(wm9705_cells); 288 break; 289 case WM9712_VENDOR_ID: 290 config = &wm9712_regmap_config; 291 cells = wm9712_cells; 292 nb_cells = ARRAY_SIZE(wm9712_cells); 293 break; 294 case WM9713_VENDOR_ID: 295 config = &wm9713_regmap_config; 296 cells = wm9713_cells; 297 nb_cells = ARRAY_SIZE(wm9713_cells); 298 break; 299 default: 300 goto err_free_compat; 301 } 302 303 for (i = 0; i < nb_cells; i++) { 304 cells[i].platform_data = codec_pdata; 305 cells[i].pdata_size = sizeof(*codec_pdata); 306 } 307 308 codec_pdata->regmap = devm_regmap_init_ac97(wm97xx->ac97, config); 309 if (IS_ERR(codec_pdata->regmap)) { 310 ret = PTR_ERR(codec_pdata->regmap); 311 goto err_free_compat; 312 } 313 314 ret = devm_mfd_add_devices(wm97xx->dev, PLATFORM_DEVID_NONE, 315 cells, nb_cells, NULL, 0, NULL); 316 if (ret) 317 goto err_free_compat; 318 319 return ret; 320 321 err_free_compat: 322 snd_ac97_compat_release(wm97xx->ac97); 323 return ret; 324 } 325 326 static int wm97xx_ac97_remove(struct ac97_codec_device *adev) 327 { 328 struct wm97xx_priv *wm97xx = ac97_get_drvdata(adev); 329 330 snd_ac97_compat_release(wm97xx->ac97); 331 332 return 0; 333 } 334 335 static const struct ac97_id wm97xx_ac97_ids[] = { 336 { .id = WM9705_VENDOR_ID, .mask = WM97xx_VENDOR_ID_MASK }, 337 { .id = WM9712_VENDOR_ID, .mask = WM97xx_VENDOR_ID_MASK }, 338 { .id = WM9713_VENDOR_ID, .mask = WM97xx_VENDOR_ID_MASK }, 339 { } 340 }; 341 342 static struct ac97_codec_driver wm97xx_ac97_driver = { 343 .driver = { 344 .name = "wm97xx-core", 345 }, 346 .probe = wm97xx_ac97_probe, 347 .remove = wm97xx_ac97_remove, 348 .id_table = wm97xx_ac97_ids, 349 }; 350 351 static int __init wm97xx_module_init(void) 352 { 353 return snd_ac97_codec_driver_register(&wm97xx_ac97_driver); 354 } 355 module_init(wm97xx_module_init); 356 357 static void __exit wm97xx_module_exit(void) 358 { 359 snd_ac97_codec_driver_unregister(&wm97xx_ac97_driver); 360 } 361 module_exit(wm97xx_module_exit); 362 363 MODULE_DESCRIPTION("WM9712, WM9713 core driver"); 364 MODULE_AUTHOR("Robert Jarzmik <robert.jarzmik@free.fr>"); 365 MODULE_LICENSE("GPL"); 366 367