drivers/pinctrl/mediatek/pinctrl-paris.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * MediaTek Pinctrl Paris Driver, which implement the vendor per-pin
   4  * bindings for MediaTek SoC.
   5  *
   6  * Copyright (C) 2018 MediaTek Inc.
   7  * Author: Sean Wang <sean.wang@mediatek.com>
   8  *         Zhiyong Tao <zhiyong.tao@mediatek.com>
   9  *         Hongzhou.Yang <hongzhou.yang@mediatek.com>
  10  */
  11
  12 #include <linux/gpio/driver.h>
  13 #include <linux/module.h>
  14 #include <dt-bindings/pinctrl/mt65xx.h>
  15 #include "pinctrl-paris.h"
  16
  17 #define PINCTRL_PINCTRL_DEV     KBUILD_MODNAME
  18
  19 /* Custom pinconf parameters */
  20 #define MTK_PIN_CONFIG_TDSEL    (PIN_CONFIG_END + 1)
  21 #define MTK_PIN_CONFIG_RDSEL    (PIN_CONFIG_END + 2)
  22 #define MTK_PIN_CONFIG_PU_ADV   (PIN_CONFIG_END + 3)
  23 #define MTK_PIN_CONFIG_PD_ADV   (PIN_CONFIG_END + 4)
  24 #define MTK_PIN_CONFIG_DRV_ADV  (PIN_CONFIG_END + 5)
  25
  26 static const struct pinconf_generic_params mtk_custom_bindings[] = {
  27         {"mediatek,tdsel",      MTK_PIN_CONFIG_TDSEL,           0},
  28         {"mediatek,rdsel",      MTK_PIN_CONFIG_RDSEL,           0},
  29         {"mediatek,pull-up-adv", MTK_PIN_CONFIG_PU_ADV,         1},
  30         {"mediatek,pull-down-adv", MTK_PIN_CONFIG_PD_ADV,       1},
  31         {"mediatek,drive-strength-adv", MTK_PIN_CONFIG_DRV_ADV, 2},
  32 };
  33
  34 #ifdef CONFIG_DEBUG_FS
  35 static const struct pin_config_item mtk_conf_items[] = {
  36         PCONFDUMP(MTK_PIN_CONFIG_TDSEL, "tdsel", NULL, true),
  37         PCONFDUMP(MTK_PIN_CONFIG_RDSEL, "rdsel", NULL, true),
  38         PCONFDUMP(MTK_PIN_CONFIG_PU_ADV, "pu-adv", NULL, true),
  39         PCONFDUMP(MTK_PIN_CONFIG_PD_ADV, "pd-adv", NULL, true),
  40         PCONFDUMP(MTK_PIN_CONFIG_DRV_ADV, "drive-strength-adv", NULL, true),
  41 };
  42 #endif
  43
  44 static const char * const mtk_gpio_functions[] = {
  45         "func0", "func1", "func2", "func3",
  46         "func4", "func5", "func6", "func7",
  47         "func8", "func9", "func10", "func11",
  48         "func12", "func13", "func14", "func15",
  49 };
  50
  51 static int mtk_pinmux_gpio_request_enable(struct pinctrl_dev *pctldev,
  52                                           struct pinctrl_gpio_range *range,
  53                                           unsigned int pin)
  54 {
  55         struct mtk_pinctrl *hw = pinctrl_dev_get_drvdata(pctldev);
  56         const struct mtk_pin_desc *desc;
  57
  58         desc = (const struct mtk_pin_desc *)&hw->soc->pins[pin];
  59
  60         return mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_MODE,
  61                                 hw->soc->gpio_m);
  62 }
  63
  64 static int mtk_pinmux_gpio_set_direction(struct pinctrl_dev *pctldev,
  65                                          struct pinctrl_gpio_range *range,
  66                                          unsigned int pin, bool input)
  67 {
  68         struct mtk_pinctrl *hw = pinctrl_dev_get_drvdata(pctldev);
  69         const struct mtk_pin_desc *desc;
  70
  71         desc = (const struct mtk_pin_desc *)&hw->soc->pins[pin];
  72
  73         /* hardware would take 0 as input direction */
  74         return mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_DIR, !input);
  75 }
  76
  77 static int mtk_pinconf_get(struct pinctrl_dev *pctldev,
  78                            unsigned int pin, unsigned long *config)
  79 {
  80         struct mtk_pinctrl *hw = pinctrl_dev_get_drvdata(pctldev);
  81         u32 param = pinconf_to_config_param(*config);
  82         int pullup, err, reg, ret = 1;
  83         const struct mtk_pin_desc *desc;
  84
  85         if (pin >= hw->soc->npins) {
  86                 err = -EINVAL;
  87                 goto out;
  88         }
  89         desc = (const struct mtk_pin_desc *)&hw->soc->pins[pin];
  90
  91         switch (param) {
  92         case PIN_CONFIG_BIAS_DISABLE:
  93         case PIN_CONFIG_BIAS_PULL_UP:
  94         case PIN_CONFIG_BIAS_PULL_DOWN:
  95                 if (hw->soc->bias_get_combo) {
  96                         err = hw->soc->bias_get_combo(hw, desc, &pullup, &ret);
  97                         if (err)
  98                                 goto out;
  99                         if (ret == MTK_PUPD_SET_R1R0_00)
 100                                 ret = MTK_DISABLE;
 101                         if (param == PIN_CONFIG_BIAS_DISABLE) {
 102                                 if (ret != MTK_DISABLE)
 103                                         err = -EINVAL;
 104                         } else if (param == PIN_CONFIG_BIAS_PULL_UP) {
 105                                 if (!pullup || ret == MTK_DISABLE)
 106                                         err = -EINVAL;
 107                         } else if (param == PIN_CONFIG_BIAS_PULL_DOWN) {
 108                                 if (pullup || ret == MTK_DISABLE)
 109                                         err = -EINVAL;
 110                         }
 111                 } else {
 112                         err = -ENOTSUPP;
 113                 }
 114                 break;
 115         case PIN_CONFIG_SLEW_RATE:
 116                 err = mtk_hw_get_value(hw, desc, PINCTRL_PIN_REG_SR, &ret);
 117                 break;
 118         case PIN_CONFIG_INPUT_ENABLE:
 119         case PIN_CONFIG_OUTPUT_ENABLE:
 120                 err = mtk_hw_get_value(hw, desc, PINCTRL_PIN_REG_DIR, &ret);
 121                 if (err)
 122                         goto out;
 123                 /*     CONFIG     Current direction return value
 124                  * -------------  ----------------- ----------------------
 125                  * OUTPUT_ENABLE       output       1 (= HW value)
 126                  *                     input        0 (= HW value)
 127                  * INPUT_ENABLE        output       0 (= reverse HW value)
 128                  *                     input        1 (= reverse HW value)
 129                  */
 130                 if (param == PIN_CONFIG_INPUT_ENABLE)
 131                         ret = !ret;
 132
 133                 break;
 134         case PIN_CONFIG_INPUT_SCHMITT_ENABLE:
 135                 err = mtk_hw_get_value(hw, desc, PINCTRL_PIN_REG_DIR, &ret);
 136                 if (err)
 137                         goto out;
 138                 /* return error when in output mode
 139                  * because schmitt trigger only work in input mode
 140                  */
 141                 if (ret) {
 142                         err = -EINVAL;
 143                         goto out;
 144                 }
 145
 146                 err = mtk_hw_get_value(hw, desc, PINCTRL_PIN_REG_SMT, &ret);
 147
 148                 break;
 149         case PIN_CONFIG_DRIVE_STRENGTH:
 150                 if (hw->soc->drive_get)
 151                         err = hw->soc->drive_get(hw, desc, &ret);
 152                 else
 153                         err = -ENOTSUPP;
 154                 break;
 155         case MTK_PIN_CONFIG_TDSEL:
 156         case MTK_PIN_CONFIG_RDSEL:
 157                 reg = (param == MTK_PIN_CONFIG_TDSEL) ?
 158                        PINCTRL_PIN_REG_TDSEL : PINCTRL_PIN_REG_RDSEL;
 159                 err = mtk_hw_get_value(hw, desc, reg, &ret);
 160                 break;
 161         case MTK_PIN_CONFIG_PU_ADV:
 162         case MTK_PIN_CONFIG_PD_ADV:
 163                 if (hw->soc->adv_pull_get) {
 164                         pullup = param == MTK_PIN_CONFIG_PU_ADV;
 165                         err = hw->soc->adv_pull_get(hw, desc, pullup, &ret);
 166                 } else
 167                         err = -ENOTSUPP;
 168                 break;
 169         case MTK_PIN_CONFIG_DRV_ADV:
 170                 if (hw->soc->adv_drive_get)
 171                         err = hw->soc->adv_drive_get(hw, desc, &ret);
 172                 else
 173                         err = -ENOTSUPP;
 174                 break;
 175         default:
 176                 err = -ENOTSUPP;
 177         }
 178
 179 out:
 180         if (!err)
 181                 *config = pinconf_to_config_packed(param, ret);
 182
 183         return err;
 184 }
 185
 186 static int mtk_pinconf_set(struct pinctrl_dev *pctldev, unsigned int pin,
 187                            enum pin_config_param param, u32 arg)
 188 {
 189         struct mtk_pinctrl *hw = pinctrl_dev_get_drvdata(pctldev);
 190         const struct mtk_pin_desc *desc;
 191         int err = 0;
 192         u32 reg;
 193
 194         if (pin >= hw->soc->npins) {
 195                 err = -EINVAL;
 196                 goto err;
 197         }
 198         desc = (const struct mtk_pin_desc *)&hw->soc->pins[pin];
 199
 200         switch ((u32)param) {
 201         case PIN_CONFIG_BIAS_DISABLE:
 202                 if (hw->soc->bias_set_combo)
 203                         err = hw->soc->bias_set_combo(hw, desc, 0, MTK_DISABLE);
 204                 else
 205                         err = -ENOTSUPP;
 206                 break;
 207         case PIN_CONFIG_BIAS_PULL_UP:
 208                 if (hw->soc->bias_set_combo)
 209                         err = hw->soc->bias_set_combo(hw, desc, 1, arg);
 210                 else
 211                         err = -ENOTSUPP;
 212                 break;
 213         case PIN_CONFIG_BIAS_PULL_DOWN:
 214                 if (hw->soc->bias_set_combo)
 215                         err = hw->soc->bias_set_combo(hw, desc, 0, arg);
 216                 else
 217                         err = -ENOTSUPP;
 218                 break;
 219         case PIN_CONFIG_OUTPUT_ENABLE:
 220                 err = mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_SMT,
 221                                        MTK_DISABLE);
 222                 /* Keep set direction to consider the case that a GPIO pin
 223                  *  does not have SMT control
 224                  */
 225                 if (err != -ENOTSUPP)
 226                         goto err;
 227
 228                 err = mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_DIR,
 229                                        MTK_OUTPUT);
 230                 break;
 231         case PIN_CONFIG_INPUT_ENABLE:
 232                 /* regard all non-zero value as enable */
 233                 err = mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_IES, !!arg);
 234                 if (err)
 235                         goto err;
 236
 237                 err = mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_DIR,
 238                                        MTK_INPUT);
 239                 break;
 240         case PIN_CONFIG_SLEW_RATE:
 241                 /* regard all non-zero value as enable */
 242                 err = mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_SR, !!arg);
 243                 break;
 244         case PIN_CONFIG_OUTPUT:
 245                 err = mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_DO,
 246                                        arg);
 247                 if (err)
 248                         goto err;
 249
 250                 err = mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_DIR,
 251                                        MTK_OUTPUT);
 252                 break;
 253         case PIN_CONFIG_INPUT_SCHMITT:
 254         case PIN_CONFIG_INPUT_SCHMITT_ENABLE:
 255                 /* arg = 1: Input mode & SMT enable ;
 256                  * arg = 0: Output mode & SMT disable
 257                  */
 258                 err = mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_DIR, !arg);
 259                 if (err)
 260                         goto err;
 261
 262                 err = mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_SMT, !!arg);
 263                 break;
 264         case PIN_CONFIG_DRIVE_STRENGTH:
 265                 if (hw->soc->drive_set)
 266                         err = hw->soc->drive_set(hw, desc, arg);
 267                 else
 268                         err = -ENOTSUPP;
 269                 break;
 270         case MTK_PIN_CONFIG_TDSEL:
 271         case MTK_PIN_CONFIG_RDSEL:
 272                 reg = (param == MTK_PIN_CONFIG_TDSEL) ?
 273                        PINCTRL_PIN_REG_TDSEL : PINCTRL_PIN_REG_RDSEL;
 274                 err = mtk_hw_set_value(hw, desc, reg, arg);
 275                 break;
 276         case MTK_PIN_CONFIG_PU_ADV:
 277         case MTK_PIN_CONFIG_PD_ADV:
 278                 if (hw->soc->adv_pull_set) {
 279                         bool pullup;
 280
 281                         pullup = param == MTK_PIN_CONFIG_PU_ADV;
 282                         err = hw->soc->adv_pull_set(hw, desc, pullup,
 283                                                     arg);
 284                 } else
 285                         err = -ENOTSUPP;
 286                 break;
 287         case MTK_PIN_CONFIG_DRV_ADV:
 288                 if (hw->soc->adv_drive_set)
 289                         err = hw->soc->adv_drive_set(hw, desc, arg);
 290                 else
 291                         err = -ENOTSUPP;
 292                 break;
 293         default:
 294                 err = -ENOTSUPP;
 295         }
 296
 297 err:
 298         return err;
 299 }
 300
 301 static struct mtk_pinctrl_group *
 302 mtk_pctrl_find_group_by_pin(struct mtk_pinctrl *hw, u32 pin)
 303 {
 304         int i;
 305
 306         for (i = 0; i < hw->soc->ngrps; i++) {
 307                 struct mtk_pinctrl_group *grp = hw->groups + i;
 308
 309                 if (grp->pin == pin)
 310                         return grp;
 311         }
 312
 313         return NULL;
 314 }
 315
 316 static const struct mtk_func_desc *
 317 mtk_pctrl_find_function_by_pin(struct mtk_pinctrl *hw, u32 pin_num, u32 fnum)
 318 {
 319         const struct mtk_pin_desc *pin = hw->soc->pins + pin_num;
 320         const struct mtk_func_desc *func = pin->funcs;
 321
 322         while (func && func->name) {
 323                 if (func->muxval == fnum)
 324                         return func;
 325                 func++;
 326         }
 327
 328         return NULL;
 329 }
 330
 331 static bool mtk_pctrl_is_function_valid(struct mtk_pinctrl *hw, u32 pin_num,
 332                                         u32 fnum)
 333 {
 334         int i;
 335
 336         for (i = 0; i < hw->soc->npins; i++) {
 337                 const struct mtk_pin_desc *pin = hw->soc->pins + i;
 338
 339                 if (pin->number == pin_num) {
 340                         const struct mtk_func_desc *func = pin->funcs;
 341
 342                         while (func && func->name) {
 343                                 if (func->muxval == fnum)
 344                                         return true;
 345                                 func++;
 346                         }
 347
 348                         break;
 349                 }
 350         }
 351
 352         return false;
 353 }
 354
 355 static int mtk_pctrl_dt_node_to_map_func(struct mtk_pinctrl *pctl,
 356                                          u32 pin, u32 fnum,
 357                                          struct mtk_pinctrl_group *grp,
 358                                          struct pinctrl_map **map,
 359                                          unsigned *reserved_maps,
 360                                          unsigned *num_maps)
 361 {
 362         bool ret;
 363
 364         if (*num_maps == *reserved_maps)
 365                 return -ENOSPC;
 366
 367         (*map)[*num_maps].type = PIN_MAP_TYPE_MUX_GROUP;
 368         (*map)[*num_maps].data.mux.group = grp->name;
 369
 370         ret = mtk_pctrl_is_function_valid(pctl, pin, fnum);
 371         if (!ret) {
 372                 dev_err(pctl->dev, "invalid function %d on pin %d .\n",
 373                         fnum, pin);
 374                 return -EINVAL;
 375         }
 376
 377         (*map)[*num_maps].data.mux.function = mtk_gpio_functions[fnum];
 378         (*num_maps)++;
 379
 380         return 0;
 381 }
 382
 383 static int mtk_pctrl_dt_subnode_to_map(struct pinctrl_dev *pctldev,
 384                                        struct device_node *node,
 385                                        struct pinctrl_map **map,
 386                                        unsigned *reserved_maps,
 387                                        unsigned *num_maps)
 388 {
 389         struct mtk_pinctrl *hw = pinctrl_dev_get_drvdata(pctldev);
 390         int num_pins, num_funcs, maps_per_pin, i, err;
 391         struct mtk_pinctrl_group *grp;
 392         unsigned int num_configs;
 393         bool has_config = false;
 394         unsigned long *configs;
 395         u32 pinfunc, pin, func;
 396         struct property *pins;
 397         unsigned reserve = 0;
 398
 399         pins = of_find_property(node, "pinmux", NULL);
 400         if (!pins) {
 401                 dev_err(hw->dev, "missing pins property in node %pOFn .\n",
 402                         node);
 403                 return -EINVAL;
 404         }
 405
 406         err = pinconf_generic_parse_dt_config(node, pctldev, &configs,
 407                                               &num_configs);
 408         if (err)
 409                 return err;
 410
 411         if (num_configs)
 412                 has_config = true;
 413
 414         num_pins = pins->length / sizeof(u32);
 415         num_funcs = num_pins;
 416         maps_per_pin = 0;
 417         if (num_funcs)
 418                 maps_per_pin++;
 419         if (has_config && num_pins >= 1)
 420                 maps_per_pin++;
 421
 422         if (!num_pins || !maps_per_pin) {
 423                 err = -EINVAL;
 424                 goto exit;
 425         }
 426
 427         reserve = num_pins * maps_per_pin;
 428
 429         err = pinctrl_utils_reserve_map(pctldev, map, reserved_maps, num_maps,
 430                                         reserve);
 431         if (err < 0)
 432                 goto exit;
 433
 434         for (i = 0; i < num_pins; i++) {
 435                 err = of_property_read_u32_index(node, "pinmux", i, &pinfunc);
 436                 if (err)
 437                         goto exit;
 438
 439                 pin = MTK_GET_PIN_NO(pinfunc);
 440                 func = MTK_GET_PIN_FUNC(pinfunc);
 441
 442                 if (pin >= hw->soc->npins ||
 443                     func >= ARRAY_SIZE(mtk_gpio_functions)) {
 444                         dev_err(hw->dev, "invalid pins value.\n");
 445                         err = -EINVAL;
 446                         goto exit;
 447                 }
 448
 449                 grp = mtk_pctrl_find_group_by_pin(hw, pin);
 450                 if (!grp) {
 451                         dev_err(hw->dev, "unable to match pin %d to group\n",
 452                                 pin);
 453                         err = -EINVAL;
 454                         goto exit;
 455                 }
 456
 457                 err = mtk_pctrl_dt_node_to_map_func(hw, pin, func, grp, map,
 458                                                     reserved_maps, num_maps);
 459                 if (err < 0)
 460                         goto exit;
 461
 462                 if (has_config) {
 463                         err = pinctrl_utils_add_map_configs(pctldev, map,
 464                                                             reserved_maps,
 465                                                             num_maps,
 466                                                             grp->name,
 467                                                             configs,
 468                                                             num_configs,
 469                                                             PIN_MAP_TYPE_CONFIGS_GROUP);
 470                         if (err < 0)
 471                                 goto exit;
 472                 }
 473         }
 474
 475         err = 0;
 476
 477 exit:
 478         kfree(configs);
 479         return err;
 480 }
 481
 482 static int mtk_pctrl_dt_node_to_map(struct pinctrl_dev *pctldev,
 483                                     struct device_node *np_config,
 484                                     struct pinctrl_map **map,
 485                                     unsigned *num_maps)
 486 {
 487         struct device_node *np;
 488         unsigned reserved_maps;
 489         int ret;
 490
 491         *map = NULL;
 492         *num_maps = 0;
 493         reserved_maps = 0;
 494
 495         for_each_child_of_node(np_config, np) {
 496                 ret = mtk_pctrl_dt_subnode_to_map(pctldev, np, map,
 497                                                   &reserved_maps,
 498                                                   num_maps);
 499                 if (ret < 0) {
 500                         pinctrl_utils_free_map(pctldev, *map, *num_maps);
 501                         of_node_put(np);
 502                         return ret;
 503                 }
 504         }
 505
 506         return 0;
 507 }
 508
 509 static int mtk_pctrl_get_groups_count(struct pinctrl_dev *pctldev)
 510 {
 511         struct mtk_pinctrl *hw = pinctrl_dev_get_drvdata(pctldev);
 512
 513         return hw->soc->ngrps;
 514 }
 515
 516 static const char *mtk_pctrl_get_group_name(struct pinctrl_dev *pctldev,
 517                                             unsigned group)
 518 {
 519         struct mtk_pinctrl *hw = pinctrl_dev_get_drvdata(pctldev);
 520
 521         return hw->groups[group].name;
 522 }
 523
 524 static int mtk_pctrl_get_group_pins(struct pinctrl_dev *pctldev,
 525                                     unsigned group, const unsigned **pins,
 526                                     unsigned *num_pins)
 527 {
 528         struct mtk_pinctrl *hw = pinctrl_dev_get_drvdata(pctldev);
 529
 530         *pins = (unsigned *)&hw->groups[group].pin;
 531         *num_pins = 1;
 532
 533         return 0;
 534 }
 535
 536 static int mtk_hw_get_value_wrap(struct mtk_pinctrl *hw, unsigned int gpio, int field)
 537 {
 538         const struct mtk_pin_desc *desc;
 539         int value, err;
 540
 541         if (gpio >= hw->soc->npins)
 542                 return -EINVAL;
 543
 544         desc = (const struct mtk_pin_desc *)&hw->soc->pins[gpio];
 545
 546         err = mtk_hw_get_value(hw, desc, field, &value);
 547         if (err)
 548                 return err;
 549
 550         return value;
 551 }
 552
 553 #define mtk_pctrl_get_pinmux(hw, gpio)                  \
 554         mtk_hw_get_value_wrap(hw, gpio, PINCTRL_PIN_REG_MODE)
 555
 556 #define mtk_pctrl_get_direction(hw, gpio)               \
 557         mtk_hw_get_value_wrap(hw, gpio, PINCTRL_PIN_REG_DIR)
 558
 559 #define mtk_pctrl_get_out(hw, gpio)                     \
 560         mtk_hw_get_value_wrap(hw, gpio, PINCTRL_PIN_REG_DO)
 561
 562 #define mtk_pctrl_get_in(hw, gpio)                      \
 563         mtk_hw_get_value_wrap(hw, gpio, PINCTRL_PIN_REG_DI)
 564
 565 #define mtk_pctrl_get_smt(hw, gpio)                     \
 566         mtk_hw_get_value_wrap(hw, gpio, PINCTRL_PIN_REG_SMT)
 567
 568 #define mtk_pctrl_get_ies(hw, gpio)                     \
 569         mtk_hw_get_value_wrap(hw, gpio, PINCTRL_PIN_REG_IES)
 570
 571 #define mtk_pctrl_get_driving(hw, gpio)                 \
 572         mtk_hw_get_value_wrap(hw, gpio, PINCTRL_PIN_REG_DRV)
 573
 574 ssize_t mtk_pctrl_show_one_pin(struct mtk_pinctrl *hw,
 575         unsigned int gpio, char *buf, unsigned int bufLen)
 576 {
 577         int pinmux, pullup, pullen, len = 0, r1 = -1, r0 = -1;
 578         const struct mtk_pin_desc *desc;
 579
 580         if (gpio >= hw->soc->npins)
 581                 return -EINVAL;
 582
 583         if (mtk_is_virt_gpio(hw, gpio))
 584                 return -EINVAL;
 585
 586         desc = (const struct mtk_pin_desc *)&hw->soc->pins[gpio];
 587         pinmux = mtk_pctrl_get_pinmux(hw, gpio);
 588         if (pinmux >= hw->soc->nfuncs)
 589                 pinmux -= hw->soc->nfuncs;
 590
 591         mtk_pinconf_bias_get_combo(hw, desc, &pullup, &pullen);
 592         if (pullen == MTK_PUPD_SET_R1R0_00) {
 593                 pullen = 0;
 594                 r1 = 0;
 595                 r0 = 0;
 596         } else if (pullen == MTK_PUPD_SET_R1R0_01) {
 597                 pullen = 1;
 598                 r1 = 0;
 599                 r0 = 1;
 600         } else if (pullen == MTK_PUPD_SET_R1R0_10) {
 601                 pullen = 1;
 602                 r1 = 1;
 603                 r0 = 0;
 604         } else if (pullen == MTK_PUPD_SET_R1R0_11) {
 605                 pullen = 1;
 606                 r1 = 1;
 607                 r0 = 1;
 608         } else if (pullen != MTK_DISABLE && pullen != MTK_ENABLE) {
 609                 pullen = 0;
 610         }
 611         len += scnprintf(buf + len, bufLen - len,
 612                         "%03d: %1d%1d%1d%1d%02d%1d%1d%1d%1d",
 613                         gpio,
 614                         pinmux,
 615                         mtk_pctrl_get_direction(hw, gpio),
 616                         mtk_pctrl_get_out(hw, gpio),
 617                         mtk_pctrl_get_in(hw, gpio),
 618                         mtk_pctrl_get_driving(hw, gpio),
 619                         mtk_pctrl_get_smt(hw, gpio),
 620                         mtk_pctrl_get_ies(hw, gpio),
 621                         pullen,
 622                         pullup);
 623
 624         if (r1 != -1) {
 625                 len += scnprintf(buf + len, bufLen - len, " (%1d %1d)\n",
 626                         r1, r0);
 627         } else {
 628                 len += scnprintf(buf + len, bufLen - len, "\n");
 629         }
 630
 631         return len;
 632 }
 633 EXPORT_SYMBOL_GPL(mtk_pctrl_show_one_pin);
 634
 635 #define PIN_DBG_BUF_SZ 96
 636 static void mtk_pctrl_dbg_show(struct pinctrl_dev *pctldev, struct seq_file *s,
 637                           unsigned int gpio)
 638 {
 639         struct mtk_pinctrl *hw = pinctrl_dev_get_drvdata(pctldev);
 640         char buf[PIN_DBG_BUF_SZ];
 641
 642         (void)mtk_pctrl_show_one_pin(hw, gpio, buf, PIN_DBG_BUF_SZ);
 643
 644         seq_printf(s, "%s", buf);
 645 }
 646
 647 static const struct pinctrl_ops mtk_pctlops = {
 648         .dt_node_to_map         = mtk_pctrl_dt_node_to_map,
 649         .dt_free_map            = pinctrl_utils_free_map,
 650         .get_groups_count       = mtk_pctrl_get_groups_count,
 651         .get_group_name         = mtk_pctrl_get_group_name,
 652         .get_group_pins         = mtk_pctrl_get_group_pins,
 653         .pin_dbg_show           = mtk_pctrl_dbg_show,
 654 };
 655
 656 static int mtk_pmx_get_funcs_cnt(struct pinctrl_dev *pctldev)
 657 {
 658         return ARRAY_SIZE(mtk_gpio_functions);
 659 }
 660
 661 static const char *mtk_pmx_get_func_name(struct pinctrl_dev *pctldev,
 662                                          unsigned selector)
 663 {
 664         return mtk_gpio_functions[selector];
 665 }
 666
 667 static int mtk_pmx_get_func_groups(struct pinctrl_dev *pctldev,
 668                                    unsigned function,
 669                                    const char * const **groups,
 670                                    unsigned * const num_groups)
 671 {
 672         struct mtk_pinctrl *hw = pinctrl_dev_get_drvdata(pctldev);
 673
 674         *groups = hw->grp_names;
 675         *num_groups = hw->soc->ngrps;
 676
 677         return 0;
 678 }
 679
 680 static int mtk_pmx_set_mux(struct pinctrl_dev *pctldev,
 681                            unsigned function,
 682                            unsigned group)
 683 {
 684         struct mtk_pinctrl *hw = pinctrl_dev_get_drvdata(pctldev);
 685         struct mtk_pinctrl_group *grp = hw->groups + group;
 686         const struct mtk_func_desc *desc_func;
 687         const struct mtk_pin_desc *desc;
 688         bool ret;
 689
 690         ret = mtk_pctrl_is_function_valid(hw, grp->pin, function);
 691         if (!ret) {
 692                 dev_err(hw->dev, "invalid function %d on group %d .\n",
 693                         function, group);
 694                 return -EINVAL;
 695         }
 696
 697         desc_func = mtk_pctrl_find_function_by_pin(hw, grp->pin, function);
 698         if (!desc_func)
 699                 return -EINVAL;
 700
 701         desc = (const struct mtk_pin_desc *)&hw->soc->pins[grp->pin];
 702         mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_MODE, desc_func->muxval);
 703
 704         return 0;
 705 }
 706
 707 static const struct pinmux_ops mtk_pmxops = {
 708         .get_functions_count    = mtk_pmx_get_funcs_cnt,
 709         .get_function_name      = mtk_pmx_get_func_name,
 710         .get_function_groups    = mtk_pmx_get_func_groups,
 711         .set_mux                = mtk_pmx_set_mux,
 712         .gpio_set_direction     = mtk_pinmux_gpio_set_direction,
 713         .gpio_request_enable    = mtk_pinmux_gpio_request_enable,
 714 };
 715
 716 static int mtk_pconf_group_get(struct pinctrl_dev *pctldev, unsigned group,
 717                                unsigned long *config)
 718 {
 719         struct mtk_pinctrl *hw = pinctrl_dev_get_drvdata(pctldev);
 720         struct mtk_pinctrl_group *grp = &hw->groups[group];
 721
 722          /* One pin per group only */
 723         return mtk_pinconf_get(pctldev, grp->pin, config);
 724 }
 725
 726 static int mtk_pconf_group_set(struct pinctrl_dev *pctldev, unsigned group,
 727                                unsigned long *configs, unsigned num_configs)
 728 {
 729         struct mtk_pinctrl *hw = pinctrl_dev_get_drvdata(pctldev);
 730         struct mtk_pinctrl_group *grp = &hw->groups[group];
 731         int i, ret;
 732
 733         for (i = 0; i < num_configs; i++) {
 734                 ret = mtk_pinconf_set(pctldev, grp->pin,
 735                                       pinconf_to_config_param(configs[i]),
 736                                       pinconf_to_config_argument(configs[i]));
 737                 if (ret < 0)
 738                         return ret;
 739         }
 740
 741         return 0;
 742 }
 743
 744 static const struct pinconf_ops mtk_confops = {
 745         .pin_config_get = mtk_pinconf_get,
 746         .pin_config_group_get   = mtk_pconf_group_get,
 747         .pin_config_group_set   = mtk_pconf_group_set,
 748         .is_generic = true,
 749 };
 750
 751 static struct pinctrl_desc mtk_desc = {
 752         .name = PINCTRL_PINCTRL_DEV,
 753         .pctlops = &mtk_pctlops,
 754         .pmxops = &mtk_pmxops,
 755         .confops = &mtk_confops,
 756         .owner = THIS_MODULE,
 757 };
 758
 759 static int mtk_gpio_get_direction(struct gpio_chip *chip, unsigned int gpio)
 760 {
 761         struct mtk_pinctrl *hw = gpiochip_get_data(chip);
 762         const struct mtk_pin_desc *desc;
 763         int value, err;
 764
 765         if (gpio >= hw->soc->npins)
 766                 return -EINVAL;
 767
 768         /*
 769          * "Virtual" GPIOs are always and only used for interrupts
 770          * Since they are only used for interrupts, they are always inputs
 771          */
 772         if (mtk_is_virt_gpio(hw, gpio))
 773                 return 1;
 774
 775         desc = (const struct mtk_pin_desc *)&hw->soc->pins[gpio];
 776
 777         err = mtk_hw_get_value(hw, desc, PINCTRL_PIN_REG_DIR, &value);
 778         if (err)
 779                 return err;
 780
 781         if (value)
 782                 return GPIO_LINE_DIRECTION_OUT;
 783
 784         return GPIO_LINE_DIRECTION_IN;
 785 }
 786
 787 static int mtk_gpio_get(struct gpio_chip *chip, unsigned int gpio)
 788 {
 789         struct mtk_pinctrl *hw = gpiochip_get_data(chip);
 790         const struct mtk_pin_desc *desc;
 791         int value, err;
 792
 793         if (gpio >= hw->soc->npins)
 794                 return -EINVAL;
 795
 796         desc = (const struct mtk_pin_desc *)&hw->soc->pins[gpio];
 797
 798         err = mtk_hw_get_value(hw, desc, PINCTRL_PIN_REG_DI, &value);
 799         if (err)
 800                 return err;
 801
 802         return !!value;
 803 }
 804
 805 static void mtk_gpio_set(struct gpio_chip *chip, unsigned int gpio, int value)
 806 {
 807         struct mtk_pinctrl *hw = gpiochip_get_data(chip);
 808         const struct mtk_pin_desc *desc;
 809
 810         if (gpio >= hw->soc->npins)
 811                 return;
 812
 813         desc = (const struct mtk_pin_desc *)&hw->soc->pins[gpio];
 814
 815         mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_DO, !!value);
 816 }
 817
 818 static int mtk_gpio_direction_input(struct gpio_chip *chip, unsigned int gpio)
 819 {
 820         struct mtk_pinctrl *hw = gpiochip_get_data(chip);
 821
 822         if (gpio >= hw->soc->npins)
 823                 return -EINVAL;
 824
 825         return pinctrl_gpio_direction_input(chip->base + gpio);
 826 }
 827
 828 static int mtk_gpio_direction_output(struct gpio_chip *chip, unsigned int gpio,
 829                                      int value)
 830 {
 831         struct mtk_pinctrl *hw = gpiochip_get_data(chip);
 832
 833         if (gpio >= hw->soc->npins)
 834                 return -EINVAL;
 835
 836         mtk_gpio_set(chip, gpio, value);
 837
 838         return pinctrl_gpio_direction_output(chip->base + gpio);
 839 }
 840
 841 static int mtk_gpio_to_irq(struct gpio_chip *chip, unsigned int offset)
 842 {
 843         struct mtk_pinctrl *hw = gpiochip_get_data(chip);
 844         const struct mtk_pin_desc *desc;
 845
 846         if (!hw->eint)
 847                 return -ENOTSUPP;
 848
 849         desc = (const struct mtk_pin_desc *)&hw->soc->pins[offset];
 850
 851         if (desc->eint.eint_n == EINT_NA)
 852                 return -ENOTSUPP;
 853
 854         return mtk_eint_find_irq(hw->eint, desc->eint.eint_n);
 855 }
 856
 857 static int mtk_gpio_set_config(struct gpio_chip *chip, unsigned int offset,
 858                                unsigned long config)
 859 {
 860         struct mtk_pinctrl *hw = gpiochip_get_data(chip);
 861         const struct mtk_pin_desc *desc;
 862         u32 debounce;
 863
 864         desc = (const struct mtk_pin_desc *)&hw->soc->pins[offset];
 865
 866         if (!hw->eint ||
 867             pinconf_to_config_param(config) != PIN_CONFIG_INPUT_DEBOUNCE ||
 868             desc->eint.eint_n == EINT_NA)
 869                 return -ENOTSUPP;
 870
 871         debounce = pinconf_to_config_argument(config);
 872
 873         return mtk_eint_set_debounce(hw->eint, desc->eint.eint_n, debounce);
 874 }
 875
 876 static int mtk_build_gpiochip(struct mtk_pinctrl *hw, struct device_node *np)
 877 {
 878         struct gpio_chip *chip = &hw->chip;
 879         int ret;
 880
 881         chip->label             = PINCTRL_PINCTRL_DEV;
 882         chip->parent            = hw->dev;
 883         chip->request           = gpiochip_generic_request;
 884         chip->free              = gpiochip_generic_free;
 885         chip->get_direction     = mtk_gpio_get_direction;
 886         chip->direction_input   = mtk_gpio_direction_input;
 887         chip->direction_output  = mtk_gpio_direction_output;
 888         chip->get               = mtk_gpio_get;
 889         chip->set               = mtk_gpio_set;
 890         chip->to_irq            = mtk_gpio_to_irq;
 891         chip->set_config        = mtk_gpio_set_config;
 892         chip->base              = -1;
 893         chip->ngpio             = hw->soc->npins;
 894         chip->of_node           = np;
 895         chip->of_gpio_n_cells   = 2;
 896
 897         ret = gpiochip_add_data(chip, hw);
 898         if (ret < 0)
 899                 return ret;
 900
 901         return 0;
 902 }
 903
 904 static int mtk_pctrl_build_state(struct platform_device *pdev)
 905 {
 906         struct mtk_pinctrl *hw = platform_get_drvdata(pdev);
 907         int i;
 908
 909         /* Allocate groups */
 910         hw->groups = devm_kmalloc_array(&pdev->dev, hw->soc->ngrps,
 911                                         sizeof(*hw->groups), GFP_KERNEL);
 912         if (!hw->groups)
 913                 return -ENOMEM;
 914
 915         /* We assume that one pin is one group, use pin name as group name. */
 916         hw->grp_names = devm_kmalloc_array(&pdev->dev, hw->soc->ngrps,
 917                                            sizeof(*hw->grp_names), GFP_KERNEL);
 918         if (!hw->grp_names)
 919                 return -ENOMEM;
 920
 921         for (i = 0; i < hw->soc->npins; i++) {
 922                 const struct mtk_pin_desc *pin = hw->soc->pins + i;
 923                 struct mtk_pinctrl_group *group = hw->groups + i;
 924
 925                 group->name = pin->name;
 926                 group->pin = pin->number;
 927
 928                 hw->grp_names[i] = pin->name;
 929         }
 930
 931         return 0;
 932 }
 933
 934 int mtk_paris_pinctrl_probe(struct platform_device *pdev,
 935                             const struct mtk_pin_soc *soc)
 936 {
 937         struct pinctrl_pin_desc *pins;
 938         struct mtk_pinctrl *hw;
 939         int err, i;
 940
 941         hw = devm_kzalloc(&pdev->dev, sizeof(*hw), GFP_KERNEL);
 942         if (!hw)
 943                 return -ENOMEM;
 944
 945         platform_set_drvdata(pdev, hw);
 946         hw->soc = soc;
 947         hw->dev = &pdev->dev;
 948
 949         if (!hw->soc->nbase_names) {
 950                 dev_err(&pdev->dev,
 951                         "SoC should be assigned at least one register base\n");
 952                 return -EINVAL;
 953         }
 954
 955         hw->base = devm_kmalloc_array(&pdev->dev, hw->soc->nbase_names,
 956                                       sizeof(*hw->base), GFP_KERNEL);
 957         if (!hw->base)
 958                 return -ENOMEM;
 959
 960         for (i = 0; i < hw->soc->nbase_names; i++) {
 961                 hw->base[i] = devm_platform_ioremap_resource_byname(pdev,
 962                                         hw->soc->base_names[i]);
 963                 if (IS_ERR(hw->base[i]))
 964                         return PTR_ERR(hw->base[i]);
 965         }
 966
 967         hw->nbase = hw->soc->nbase_names;
 968
 969         spin_lock_init(&hw->lock);
 970
 971         err = mtk_pctrl_build_state(pdev);
 972         if (err) {
 973                 dev_err(&pdev->dev, "build state failed: %d\n", err);
 974                 return -EINVAL;
 975         }
 976
 977         /* Copy from internal struct mtk_pin_desc to register to the core */
 978         pins = devm_kmalloc_array(&pdev->dev, hw->soc->npins, sizeof(*pins),
 979                                   GFP_KERNEL);
 980         if (!pins)
 981                 return -ENOMEM;
 982
 983         for (i = 0; i < hw->soc->npins; i++) {
 984                 pins[i].number = hw->soc->pins[i].number;
 985                 pins[i].name = hw->soc->pins[i].name;
 986         }
 987
 988         /* Setup pins descriptions per SoC types */
 989         mtk_desc.pins = (const struct pinctrl_pin_desc *)pins;
 990         mtk_desc.npins = hw->soc->npins;
 991         mtk_desc.num_custom_params = ARRAY_SIZE(mtk_custom_bindings);
 992         mtk_desc.custom_params = mtk_custom_bindings;
 993 #ifdef CONFIG_DEBUG_FS
 994         mtk_desc.custom_conf_items = mtk_conf_items;
 995 #endif
 996
 997         err = devm_pinctrl_register_and_init(&pdev->dev, &mtk_desc, hw,
 998                                              &hw->pctrl);
 999         if (err)
1000                 return err;
1001
1002         err = pinctrl_enable(hw->pctrl);
1003         if (err)
1004                 return err;
1005
1006         err = mtk_build_eint(hw, pdev);
1007         if (err)
1008                 dev_warn(&pdev->dev,
1009                          "Failed to add EINT, but pinctrl still can work\n");
1010
1011         /* Build gpiochip should be after pinctrl_enable is done */
1012         err = mtk_build_gpiochip(hw, pdev->dev.of_node);
1013         if (err) {
1014                 dev_err(&pdev->dev, "Failed to add gpio_chip\n");
1015                 return err;
1016         }
1017
1018         platform_set_drvdata(pdev, hw);
1019
1020         return 0;
1021 }
1022 EXPORT_SYMBOL_GPL(mtk_paris_pinctrl_probe);
1023
1024 static int mtk_paris_pinctrl_suspend(struct device *device)
1025 {
1026         struct mtk_pinctrl *pctl = dev_get_drvdata(device);
1027
1028         return mtk_eint_do_suspend(pctl->eint);
1029 }
1030
1031 static int mtk_paris_pinctrl_resume(struct device *device)
1032 {
1033         struct mtk_pinctrl *pctl = dev_get_drvdata(device);
1034
1035         return mtk_eint_do_resume(pctl->eint);
1036 }
1037
1038 const struct dev_pm_ops mtk_paris_pinctrl_pm_ops = {
1039         .suspend_noirq = mtk_paris_pinctrl_suspend,
1040         .resume_noirq = mtk_paris_pinctrl_resume,
1041 };
1042
1043 MODULE_LICENSE("GPL v2");
1044 MODULE_DESCRIPTION("MediaTek Pinctrl Common Driver V2 Paris");