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 (param == PIN_CONFIG_BIAS_DISABLE) {
 100                                 if (ret == MTK_PUPD_SET_R1R0_00)
 101                                         ret = MTK_DISABLE;
 102                         } else if (param == PIN_CONFIG_BIAS_PULL_UP) {
 103                                 /* When desire to get pull-up value, return
 104                                  *  error if current setting is pull-down
 105                                  */
 106                                 if (!pullup)
 107                                         err = -EINVAL;
 108                         } else if (param == PIN_CONFIG_BIAS_PULL_DOWN) {
 109                                 /* When desire to get pull-down value, return
 110                                  *  error if current setting is pull-up
 111                                  */
 112                                 if (pullup)
 113                                         err = -EINVAL;
 114                         }
 115                 } else {
 116                         err = -ENOTSUPP;
 117                 }
 118                 break;
 119         case PIN_CONFIG_SLEW_RATE:
 120                 err = mtk_hw_get_value(hw, desc, PINCTRL_PIN_REG_SR, &ret);
 121                 break;
 122         case PIN_CONFIG_INPUT_ENABLE:
 123         case PIN_CONFIG_OUTPUT_ENABLE:
 124                 err = mtk_hw_get_value(hw, desc, PINCTRL_PIN_REG_DIR, &ret);
 125                 if (err)
 126                         goto out;
 127                 /*     CONFIG     Current direction return value
 128                  * -------------  ----------------- ----------------------
 129                  * OUTPUT_ENABLE       output       1 (= HW value)
 130                  *                     input        0 (= HW value)
 131                  * INPUT_ENABLE        output       0 (= reverse HW value)
 132                  *                     input        1 (= reverse HW value)
 133                  */
 134                 if (param == PIN_CONFIG_INPUT_ENABLE)
 135                         ret = !ret;
 136
 137                 break;
 138         case PIN_CONFIG_INPUT_SCHMITT_ENABLE:
 139                 err = mtk_hw_get_value(hw, desc, PINCTRL_PIN_REG_DIR, &ret);
 140                 if (err)
 141                         goto out;
 142                 /* return error when in output mode
 143                  * because schmitt trigger only work in input mode
 144                  */
 145                 if (ret) {
 146                         err = -EINVAL;
 147                         goto out;
 148                 }
 149
 150                 err = mtk_hw_get_value(hw, desc, PINCTRL_PIN_REG_SMT, &ret);
 151
 152                 break;
 153         case PIN_CONFIG_DRIVE_STRENGTH:
 154                 if (hw->soc->drive_get)
 155                         err = hw->soc->drive_get(hw, desc, &ret);
 156                 else
 157                         err = -ENOTSUPP;
 158                 break;
 159         case MTK_PIN_CONFIG_TDSEL:
 160         case MTK_PIN_CONFIG_RDSEL:
 161                 reg = (param == MTK_PIN_CONFIG_TDSEL) ?
 162                        PINCTRL_PIN_REG_TDSEL : PINCTRL_PIN_REG_RDSEL;
 163                 err = mtk_hw_get_value(hw, desc, reg, &ret);
 164                 break;
 165         case MTK_PIN_CONFIG_PU_ADV:
 166         case MTK_PIN_CONFIG_PD_ADV:
 167                 if (hw->soc->adv_pull_get) {
 168                         pullup = param == MTK_PIN_CONFIG_PU_ADV;
 169                         err = hw->soc->adv_pull_get(hw, desc, pullup, &ret);
 170                 } else
 171                         err = -ENOTSUPP;
 172                 break;
 173         case MTK_PIN_CONFIG_DRV_ADV:
 174                 if (hw->soc->adv_drive_get)
 175                         err = hw->soc->adv_drive_get(hw, desc, &ret);
 176                 else
 177                         err = -ENOTSUPP;
 178                 break;
 179         default:
 180                 err = -ENOTSUPP;
 181         }
 182
 183 out:
 184         if (!err)
 185                 *config = pinconf_to_config_packed(param, ret);
 186
 187         return err;
 188 }
 189
 190 static int mtk_pinconf_set(struct pinctrl_dev *pctldev, unsigned int pin,
 191                            enum pin_config_param param,
 192                            enum pin_config_param arg)
 193 {
 194         struct mtk_pinctrl *hw = pinctrl_dev_get_drvdata(pctldev);
 195         const struct mtk_pin_desc *desc;
 196         int err = 0;
 197         u32 reg;
 198
 199         if (pin >= hw->soc->npins) {
 200                 err = -EINVAL;
 201                 goto err;
 202         }
 203         desc = (const struct mtk_pin_desc *)&hw->soc->pins[pin];
 204
 205         switch ((u32)param) {
 206         case PIN_CONFIG_BIAS_DISABLE:
 207                 if (hw->soc->bias_set_combo)
 208                         err = hw->soc->bias_set_combo(hw, desc, 0, MTK_DISABLE);
 209                 else
 210                         err = -ENOTSUPP;
 211                 break;
 212         case PIN_CONFIG_BIAS_PULL_UP:
 213                 if (hw->soc->bias_set_combo)
 214                         err = hw->soc->bias_set_combo(hw, desc, 1, arg);
 215                 else
 216                         err = -ENOTSUPP;
 217                 break;
 218         case PIN_CONFIG_BIAS_PULL_DOWN:
 219                 if (hw->soc->bias_set_combo)
 220                         err = hw->soc->bias_set_combo(hw, desc, 0, arg);
 221                 else
 222                         err = -ENOTSUPP;
 223                 break;
 224         case PIN_CONFIG_OUTPUT_ENABLE:
 225                 err = mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_SMT,
 226                                        MTK_DISABLE);
 227                 /* Keep set direction to consider the case that a GPIO pin
 228                  *  does not have SMT control
 229                  */
 230                 if (err != -ENOTSUPP)
 231                         goto err;
 232
 233                 err = mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_DIR,
 234                                        MTK_OUTPUT);
 235                 break;
 236         case PIN_CONFIG_INPUT_ENABLE:
 237                 /* regard all non-zero value as enable */
 238                 err = mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_IES, !!arg);
 239                 if (err)
 240                         goto err;
 241
 242                 err = mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_DIR,
 243                                        MTK_INPUT);
 244                 break;
 245         case PIN_CONFIG_SLEW_RATE:
 246                 /* regard all non-zero value as enable */
 247                 err = mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_SR, !!arg);
 248                 break;
 249         case PIN_CONFIG_OUTPUT:
 250                 err = mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_DO,
 251                                        arg);
 252                 if (err)
 253                         goto err;
 254
 255                 err = mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_DIR,
 256                                        MTK_OUTPUT);
 257                 break;
 258         case PIN_CONFIG_INPUT_SCHMITT:
 259         case PIN_CONFIG_INPUT_SCHMITT_ENABLE:
 260                 /* arg = 1: Input mode & SMT enable ;
 261                  * arg = 0: Output mode & SMT disable
 262                  */
 263                 err = mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_DIR, !arg);
 264                 if (err)
 265                         goto err;
 266
 267                 err = mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_SMT, !!arg);
 268                 break;
 269         case PIN_CONFIG_DRIVE_STRENGTH:
 270                 if (hw->soc->drive_set)
 271                         err = hw->soc->drive_set(hw, desc, arg);
 272                 else
 273                         err = -ENOTSUPP;
 274                 break;
 275         case MTK_PIN_CONFIG_TDSEL:
 276         case MTK_PIN_CONFIG_RDSEL:
 277                 reg = (param == MTK_PIN_CONFIG_TDSEL) ?
 278                        PINCTRL_PIN_REG_TDSEL : PINCTRL_PIN_REG_RDSEL;
 279                 err = mtk_hw_set_value(hw, desc, reg, arg);
 280                 break;
 281         case MTK_PIN_CONFIG_PU_ADV:
 282         case MTK_PIN_CONFIG_PD_ADV:
 283                 if (hw->soc->adv_pull_set) {
 284                         bool pullup;
 285
 286                         pullup = param == MTK_PIN_CONFIG_PU_ADV;
 287                         err = hw->soc->adv_pull_set(hw, desc, pullup,
 288                                                     arg);
 289                 } else
 290                         err = -ENOTSUPP;
 291                 break;
 292         case MTK_PIN_CONFIG_DRV_ADV:
 293                 if (hw->soc->adv_drive_set)
 294                         err = hw->soc->adv_drive_set(hw, desc, arg);
 295                 else
 296                         err = -ENOTSUPP;
 297                 break;
 298         default:
 299                 err = -ENOTSUPP;
 300         }
 301
 302 err:
 303         return err;
 304 }
 305
 306 static struct mtk_pinctrl_group *
 307 mtk_pctrl_find_group_by_pin(struct mtk_pinctrl *hw, u32 pin)
 308 {
 309         int i;
 310
 311         for (i = 0; i < hw->soc->ngrps; i++) {
 312                 struct mtk_pinctrl_group *grp = hw->groups + i;
 313
 314                 if (grp->pin == pin)
 315                         return grp;
 316         }
 317
 318         return NULL;
 319 }
 320
 321 static const struct mtk_func_desc *
 322 mtk_pctrl_find_function_by_pin(struct mtk_pinctrl *hw, u32 pin_num, u32 fnum)
 323 {
 324         const struct mtk_pin_desc *pin = hw->soc->pins + pin_num;
 325         const struct mtk_func_desc *func = pin->funcs;
 326
 327         while (func && func->name) {
 328                 if (func->muxval == fnum)
 329                         return func;
 330                 func++;
 331         }
 332
 333         return NULL;
 334 }
 335
 336 static bool mtk_pctrl_is_function_valid(struct mtk_pinctrl *hw, u32 pin_num,
 337                                         u32 fnum)
 338 {
 339         int i;
 340
 341         for (i = 0; i < hw->soc->npins; i++) {
 342                 const struct mtk_pin_desc *pin = hw->soc->pins + i;
 343
 344                 if (pin->number == pin_num) {
 345                         const struct mtk_func_desc *func = pin->funcs;
 346
 347                         while (func && func->name) {
 348                                 if (func->muxval == fnum)
 349                                         return true;
 350                                 func++;
 351                         }
 352
 353                         break;
 354                 }
 355         }
 356
 357         return false;
 358 }
 359
 360 static int mtk_pctrl_dt_node_to_map_func(struct mtk_pinctrl *pctl,
 361                                          u32 pin, u32 fnum,
 362                                          struct mtk_pinctrl_group *grp,
 363                                          struct pinctrl_map **map,
 364                                          unsigned *reserved_maps,
 365                                          unsigned *num_maps)
 366 {
 367         bool ret;
 368
 369         if (*num_maps == *reserved_maps)
 370                 return -ENOSPC;
 371
 372         (*map)[*num_maps].type = PIN_MAP_TYPE_MUX_GROUP;
 373         (*map)[*num_maps].data.mux.group = grp->name;
 374
 375         ret = mtk_pctrl_is_function_valid(pctl, pin, fnum);
 376         if (!ret) {
 377                 dev_err(pctl->dev, "invalid function %d on pin %d .\n",
 378                         fnum, pin);
 379                 return -EINVAL;
 380         }
 381
 382         (*map)[*num_maps].data.mux.function = mtk_gpio_functions[fnum];
 383         (*num_maps)++;
 384
 385         return 0;
 386 }
 387
 388 static int mtk_pctrl_dt_subnode_to_map(struct pinctrl_dev *pctldev,
 389                                        struct device_node *node,
 390                                        struct pinctrl_map **map,
 391                                        unsigned *reserved_maps,
 392                                        unsigned *num_maps)
 393 {
 394         struct mtk_pinctrl *hw = pinctrl_dev_get_drvdata(pctldev);
 395         int num_pins, num_funcs, maps_per_pin, i, err;
 396         struct mtk_pinctrl_group *grp;
 397         unsigned int num_configs;
 398         bool has_config = false;
 399         unsigned long *configs;
 400         u32 pinfunc, pin, func;
 401         struct property *pins;
 402         unsigned reserve = 0;
 403
 404         pins = of_find_property(node, "pinmux", NULL);
 405         if (!pins) {
 406                 dev_err(hw->dev, "missing pins property in node %pOFn .\n",
 407                         node);
 408                 return -EINVAL;
 409         }
 410
 411         err = pinconf_generic_parse_dt_config(node, pctldev, &configs,
 412                                               &num_configs);
 413         if (err)
 414                 return err;
 415
 416         if (num_configs)
 417                 has_config = true;
 418
 419         num_pins = pins->length / sizeof(u32);
 420         num_funcs = num_pins;
 421         maps_per_pin = 0;
 422         if (num_funcs)
 423                 maps_per_pin++;
 424         if (has_config && num_pins >= 1)
 425                 maps_per_pin++;
 426
 427         if (!num_pins || !maps_per_pin) {
 428                 err = -EINVAL;
 429                 goto exit;
 430         }
 431
 432         reserve = num_pins * maps_per_pin;
 433
 434         err = pinctrl_utils_reserve_map(pctldev, map, reserved_maps, num_maps,
 435                                         reserve);
 436         if (err < 0)
 437                 goto exit;
 438
 439         for (i = 0; i < num_pins; i++) {
 440                 err = of_property_read_u32_index(node, "pinmux", i, &pinfunc);
 441                 if (err)
 442                         goto exit;
 443
 444                 pin = MTK_GET_PIN_NO(pinfunc);
 445                 func = MTK_GET_PIN_FUNC(pinfunc);
 446
 447                 if (pin >= hw->soc->npins ||
 448                     func >= ARRAY_SIZE(mtk_gpio_functions)) {
 449                         dev_err(hw->dev, "invalid pins value.\n");
 450                         err = -EINVAL;
 451                         goto exit;
 452                 }
 453
 454                 grp = mtk_pctrl_find_group_by_pin(hw, pin);
 455                 if (!grp) {
 456                         dev_err(hw->dev, "unable to match pin %d to group\n",
 457                                 pin);
 458                         err = -EINVAL;
 459                         goto exit;
 460                 }
 461
 462                 err = mtk_pctrl_dt_node_to_map_func(hw, pin, func, grp, map,
 463                                                     reserved_maps, num_maps);
 464                 if (err < 0)
 465                         goto exit;
 466
 467                 if (has_config) {
 468                         err = pinctrl_utils_add_map_configs(pctldev, map,
 469                                                             reserved_maps,
 470                                                             num_maps,
 471                                                             grp->name,
 472                                                             configs,
 473                                                             num_configs,
 474                                                             PIN_MAP_TYPE_CONFIGS_GROUP);
 475                         if (err < 0)
 476                                 goto exit;
 477                 }
 478         }
 479
 480         err = 0;
 481
 482 exit:
 483         kfree(configs);
 484         return err;
 485 }
 486
 487 static int mtk_pctrl_dt_node_to_map(struct pinctrl_dev *pctldev,
 488                                     struct device_node *np_config,
 489                                     struct pinctrl_map **map,
 490                                     unsigned *num_maps)
 491 {
 492         struct device_node *np;
 493         unsigned reserved_maps;
 494         int ret;
 495
 496         *map = NULL;
 497         *num_maps = 0;
 498         reserved_maps = 0;
 499
 500         for_each_child_of_node(np_config, np) {
 501                 ret = mtk_pctrl_dt_subnode_to_map(pctldev, np, map,
 502                                                   &reserved_maps,
 503                                                   num_maps);
 504                 if (ret < 0) {
 505                         pinctrl_utils_free_map(pctldev, *map, *num_maps);
 506                         of_node_put(np);
 507                         return ret;
 508                 }
 509         }
 510
 511         return 0;
 512 }
 513
 514 static int mtk_pctrl_get_groups_count(struct pinctrl_dev *pctldev)
 515 {
 516         struct mtk_pinctrl *hw = pinctrl_dev_get_drvdata(pctldev);
 517
 518         return hw->soc->ngrps;
 519 }
 520
 521 static const char *mtk_pctrl_get_group_name(struct pinctrl_dev *pctldev,
 522                                             unsigned group)
 523 {
 524         struct mtk_pinctrl *hw = pinctrl_dev_get_drvdata(pctldev);
 525
 526         return hw->groups[group].name;
 527 }
 528
 529 static int mtk_pctrl_get_group_pins(struct pinctrl_dev *pctldev,
 530                                     unsigned group, const unsigned **pins,
 531                                     unsigned *num_pins)
 532 {
 533         struct mtk_pinctrl *hw = pinctrl_dev_get_drvdata(pctldev);
 534
 535         *pins = (unsigned *)&hw->groups[group].pin;
 536         *num_pins = 1;
 537
 538         return 0;
 539 }
 540
 541 static int mtk_hw_get_value_wrap(struct mtk_pinctrl *hw, unsigned int gpio, int field)
 542 {
 543         const struct mtk_pin_desc *desc;
 544         int value, err;
 545
 546         if (gpio >= hw->soc->npins)
 547                 return -EINVAL;
 548
 549         desc = (const struct mtk_pin_desc *)&hw->soc->pins[gpio];
 550
 551         err = mtk_hw_get_value(hw, desc, field, &value);
 552         if (err)
 553                 return err;
 554
 555         return value;
 556 }
 557
 558 #define mtk_pctrl_get_pinmux(hw, gpio)                  \
 559         mtk_hw_get_value_wrap(hw, gpio, PINCTRL_PIN_REG_MODE)
 560
 561 #define mtk_pctrl_get_direction(hw, gpio)               \
 562         mtk_hw_get_value_wrap(hw, gpio, PINCTRL_PIN_REG_DIR)
 563
 564 #define mtk_pctrl_get_out(hw, gpio)                     \
 565         mtk_hw_get_value_wrap(hw, gpio, PINCTRL_PIN_REG_DO)
 566
 567 #define mtk_pctrl_get_in(hw, gpio)                      \
 568         mtk_hw_get_value_wrap(hw, gpio, PINCTRL_PIN_REG_DI)
 569
 570 #define mtk_pctrl_get_smt(hw, gpio)                     \
 571         mtk_hw_get_value_wrap(hw, gpio, PINCTRL_PIN_REG_SMT)
 572
 573 #define mtk_pctrl_get_ies(hw, gpio)                     \
 574         mtk_hw_get_value_wrap(hw, gpio, PINCTRL_PIN_REG_IES)
 575
 576 #define mtk_pctrl_get_driving(hw, gpio)                 \
 577         mtk_hw_get_value_wrap(hw, gpio, PINCTRL_PIN_REG_DRV)
 578
 579 ssize_t mtk_pctrl_show_one_pin(struct mtk_pinctrl *hw,
 580         unsigned int gpio, char *buf, unsigned int bufLen)
 581 {
 582         int pinmux, pullup, pullen, len = 0, r1 = -1, r0 = -1;
 583         const struct mtk_pin_desc *desc;
 584
 585         if (gpio >= hw->soc->npins)
 586                 return -EINVAL;
 587
 588         desc = (const struct mtk_pin_desc *)&hw->soc->pins[gpio];
 589         pinmux = mtk_pctrl_get_pinmux(hw, gpio);
 590         if (pinmux >= hw->soc->nfuncs)
 591                 pinmux -= hw->soc->nfuncs;
 592
 593         mtk_pinconf_bias_get_combo(hw, desc, &pullup, &pullen);
 594         if (pullen == MTK_PUPD_SET_R1R0_00) {
 595                 pullen = 0;
 596                 r1 = 0;
 597                 r0 = 0;
 598         } else if (pullen == MTK_PUPD_SET_R1R0_01) {
 599                 pullen = 1;
 600                 r1 = 0;
 601                 r0 = 1;
 602         } else if (pullen == MTK_PUPD_SET_R1R0_10) {
 603                 pullen = 1;
 604                 r1 = 1;
 605                 r0 = 0;
 606         } else if (pullen == MTK_PUPD_SET_R1R0_11) {
 607                 pullen = 1;
 608                 r1 = 1;
 609                 r0 = 1;
 610         } else if (pullen != MTK_DISABLE && pullen != MTK_ENABLE) {
 611                 pullen = 0;
 612         }
 613         len += scnprintf(buf + len, bufLen - len,
 614                         "%03d: %1d%1d%1d%1d%02d%1d%1d%1d%1d",
 615                         gpio,
 616                         pinmux,
 617                         mtk_pctrl_get_direction(hw, gpio),
 618                         mtk_pctrl_get_out(hw, gpio),
 619                         mtk_pctrl_get_in(hw, gpio),
 620                         mtk_pctrl_get_driving(hw, gpio),
 621                         mtk_pctrl_get_smt(hw, gpio),
 622                         mtk_pctrl_get_ies(hw, gpio),
 623                         pullen,
 624                         pullup);
 625
 626         if (r1 != -1) {
 627                 len += scnprintf(buf + len, bufLen - len, " (%1d %1d)\n",
 628                         r1, r0);
 629         } else {
 630                 len += scnprintf(buf + len, bufLen - len, "\n");
 631         }
 632
 633         return len;
 634 }
 635 EXPORT_SYMBOL_GPL(mtk_pctrl_show_one_pin);
 636
 637 #define PIN_DBG_BUF_SZ 96
 638 static void mtk_pctrl_dbg_show(struct pinctrl_dev *pctldev, struct seq_file *s,
 639                           unsigned int gpio)
 640 {
 641         struct mtk_pinctrl *hw = pinctrl_dev_get_drvdata(pctldev);
 642         char buf[PIN_DBG_BUF_SZ];
 643
 644         (void)mtk_pctrl_show_one_pin(hw, gpio, buf, PIN_DBG_BUF_SZ);
 645
 646         seq_printf(s, "%s", buf);
 647 }
 648
 649 static const struct pinctrl_ops mtk_pctlops = {
 650         .dt_node_to_map         = mtk_pctrl_dt_node_to_map,
 651         .dt_free_map            = pinctrl_utils_free_map,
 652         .get_groups_count       = mtk_pctrl_get_groups_count,
 653         .get_group_name         = mtk_pctrl_get_group_name,
 654         .get_group_pins         = mtk_pctrl_get_group_pins,
 655         .pin_dbg_show           = mtk_pctrl_dbg_show,
 656 };
 657
 658 static int mtk_pmx_get_funcs_cnt(struct pinctrl_dev *pctldev)
 659 {
 660         return ARRAY_SIZE(mtk_gpio_functions);
 661 }
 662
 663 static const char *mtk_pmx_get_func_name(struct pinctrl_dev *pctldev,
 664                                          unsigned selector)
 665 {
 666         return mtk_gpio_functions[selector];
 667 }
 668
 669 static int mtk_pmx_get_func_groups(struct pinctrl_dev *pctldev,
 670                                    unsigned function,
 671                                    const char * const **groups,
 672                                    unsigned * const num_groups)
 673 {
 674         struct mtk_pinctrl *hw = pinctrl_dev_get_drvdata(pctldev);
 675
 676         *groups = hw->grp_names;
 677         *num_groups = hw->soc->ngrps;
 678
 679         return 0;
 680 }
 681
 682 static int mtk_pmx_set_mux(struct pinctrl_dev *pctldev,
 683                            unsigned function,
 684                            unsigned group)
 685 {
 686         struct mtk_pinctrl *hw = pinctrl_dev_get_drvdata(pctldev);
 687         struct mtk_pinctrl_group *grp = hw->groups + group;
 688         const struct mtk_func_desc *desc_func;
 689         const struct mtk_pin_desc *desc;
 690         bool ret;
 691
 692         ret = mtk_pctrl_is_function_valid(hw, grp->pin, function);
 693         if (!ret) {
 694                 dev_err(hw->dev, "invalid function %d on group %d .\n",
 695                         function, group);
 696                 return -EINVAL;
 697         }
 698
 699         desc_func = mtk_pctrl_find_function_by_pin(hw, grp->pin, function);
 700         if (!desc_func)
 701                 return -EINVAL;
 702
 703         desc = (const struct mtk_pin_desc *)&hw->soc->pins[grp->pin];
 704         mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_MODE, desc_func->muxval);
 705
 706         return 0;
 707 }
 708
 709 static const struct pinmux_ops mtk_pmxops = {
 710         .get_functions_count    = mtk_pmx_get_funcs_cnt,
 711         .get_function_name      = mtk_pmx_get_func_name,
 712         .get_function_groups    = mtk_pmx_get_func_groups,
 713         .set_mux                = mtk_pmx_set_mux,
 714         .gpio_set_direction     = mtk_pinmux_gpio_set_direction,
 715         .gpio_request_enable    = mtk_pinmux_gpio_request_enable,
 716 };
 717
 718 static int mtk_pconf_group_get(struct pinctrl_dev *pctldev, unsigned group,
 719                                unsigned long *config)
 720 {
 721         struct mtk_pinctrl *hw = pinctrl_dev_get_drvdata(pctldev);
 722
 723         *config = hw->groups[group].config;
 724
 725         return 0;
 726 }
 727
 728 static int mtk_pconf_group_set(struct pinctrl_dev *pctldev, unsigned group,
 729                                unsigned long *configs, unsigned num_configs)
 730 {
 731         struct mtk_pinctrl *hw = pinctrl_dev_get_drvdata(pctldev);
 732         struct mtk_pinctrl_group *grp = &hw->groups[group];
 733         int i, ret;
 734
 735         for (i = 0; i < num_configs; i++) {
 736                 ret = mtk_pinconf_set(pctldev, grp->pin,
 737                                       pinconf_to_config_param(configs[i]),
 738                                       pinconf_to_config_argument(configs[i]));
 739                 if (ret < 0)
 740                         return ret;
 741
 742                 grp->config = configs[i];
 743         }
 744
 745         return 0;
 746 }
 747
 748 static const struct pinconf_ops mtk_confops = {
 749         .pin_config_get = mtk_pinconf_get,
 750         .pin_config_group_get   = mtk_pconf_group_get,
 751         .pin_config_group_set   = mtk_pconf_group_set,
 752         .is_generic = true,
 753 };
 754
 755 static struct pinctrl_desc mtk_desc = {
 756         .name = PINCTRL_PINCTRL_DEV,
 757         .pctlops = &mtk_pctlops,
 758         .pmxops = &mtk_pmxops,
 759         .confops = &mtk_confops,
 760         .owner = THIS_MODULE,
 761 };
 762
 763 static int mtk_gpio_get_direction(struct gpio_chip *chip, unsigned int gpio)
 764 {
 765         struct mtk_pinctrl *hw = gpiochip_get_data(chip);
 766         const struct mtk_pin_desc *desc;
 767         int value, err;
 768
 769         if (gpio >= hw->soc->npins)
 770                 return -EINVAL;
 771
 772         /*
 773          * "Virtual" GPIOs are always and only used for interrupts
 774          * Since they are only used for interrupts, they are always inputs
 775          */
 776         if (mtk_is_virt_gpio(hw, gpio))
 777                 return 1;
 778
 779         desc = (const struct mtk_pin_desc *)&hw->soc->pins[gpio];
 780
 781         err = mtk_hw_get_value(hw, desc, PINCTRL_PIN_REG_DIR, &value);
 782         if (err)
 783                 return err;
 784
 785         if (value)
 786                 return GPIO_LINE_DIRECTION_OUT;
 787
 788         return GPIO_LINE_DIRECTION_IN;
 789 }
 790
 791 static int mtk_gpio_get(struct gpio_chip *chip, unsigned int gpio)
 792 {
 793         struct mtk_pinctrl *hw = gpiochip_get_data(chip);
 794         const struct mtk_pin_desc *desc;
 795         int value, err;
 796
 797         if (gpio >= hw->soc->npins)
 798                 return -EINVAL;
 799
 800         desc = (const struct mtk_pin_desc *)&hw->soc->pins[gpio];
 801
 802         err = mtk_hw_get_value(hw, desc, PINCTRL_PIN_REG_DI, &value);
 803         if (err)
 804                 return err;
 805
 806         return !!value;
 807 }
 808
 809 static void mtk_gpio_set(struct gpio_chip *chip, unsigned int gpio, int value)
 810 {
 811         struct mtk_pinctrl *hw = gpiochip_get_data(chip);
 812         const struct mtk_pin_desc *desc;
 813
 814         if (gpio >= hw->soc->npins)
 815                 return;
 816
 817         desc = (const struct mtk_pin_desc *)&hw->soc->pins[gpio];
 818
 819         mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_DO, !!value);
 820 }
 821
 822 static int mtk_gpio_direction_input(struct gpio_chip *chip, unsigned int gpio)
 823 {
 824         struct mtk_pinctrl *hw = gpiochip_get_data(chip);
 825
 826         if (gpio >= hw->soc->npins)
 827                 return -EINVAL;
 828
 829         return pinctrl_gpio_direction_input(chip->base + gpio);
 830 }
 831
 832 static int mtk_gpio_direction_output(struct gpio_chip *chip, unsigned int gpio,
 833                                      int value)
 834 {
 835         struct mtk_pinctrl *hw = gpiochip_get_data(chip);
 836
 837         if (gpio >= hw->soc->npins)
 838                 return -EINVAL;
 839
 840         mtk_gpio_set(chip, gpio, value);
 841
 842         return pinctrl_gpio_direction_output(chip->base + gpio);
 843 }
 844
 845 static int mtk_gpio_to_irq(struct gpio_chip *chip, unsigned int offset)
 846 {
 847         struct mtk_pinctrl *hw = gpiochip_get_data(chip);
 848         const struct mtk_pin_desc *desc;
 849
 850         if (!hw->eint)
 851                 return -ENOTSUPP;
 852
 853         desc = (const struct mtk_pin_desc *)&hw->soc->pins[offset];
 854
 855         if (desc->eint.eint_n == EINT_NA)
 856                 return -ENOTSUPP;
 857
 858         return mtk_eint_find_irq(hw->eint, desc->eint.eint_n);
 859 }
 860
 861 static int mtk_gpio_set_config(struct gpio_chip *chip, unsigned int offset,
 862                                unsigned long config)
 863 {
 864         struct mtk_pinctrl *hw = gpiochip_get_data(chip);
 865         const struct mtk_pin_desc *desc;
 866         u32 debounce;
 867
 868         desc = (const struct mtk_pin_desc *)&hw->soc->pins[offset];
 869
 870         if (!hw->eint ||
 871             pinconf_to_config_param(config) != PIN_CONFIG_INPUT_DEBOUNCE ||
 872             desc->eint.eint_n == EINT_NA)
 873                 return -ENOTSUPP;
 874
 875         debounce = pinconf_to_config_argument(config);
 876
 877         return mtk_eint_set_debounce(hw->eint, desc->eint.eint_n, debounce);
 878 }
 879
 880 static int mtk_build_gpiochip(struct mtk_pinctrl *hw, struct device_node *np)
 881 {
 882         struct gpio_chip *chip = &hw->chip;
 883         int ret;
 884
 885         chip->label             = PINCTRL_PINCTRL_DEV;
 886         chip->parent            = hw->dev;
 887         chip->request           = gpiochip_generic_request;
 888         chip->free              = gpiochip_generic_free;
 889         chip->get_direction     = mtk_gpio_get_direction;
 890         chip->direction_input   = mtk_gpio_direction_input;
 891         chip->direction_output  = mtk_gpio_direction_output;
 892         chip->get               = mtk_gpio_get;
 893         chip->set               = mtk_gpio_set;
 894         chip->to_irq            = mtk_gpio_to_irq;
 895         chip->set_config        = mtk_gpio_set_config;
 896         chip->base              = -1;
 897         chip->ngpio             = hw->soc->npins;
 898         chip->of_node           = np;
 899         chip->of_gpio_n_cells   = 2;
 900
 901         ret = gpiochip_add_data(chip, hw);
 902         if (ret < 0)
 903                 return ret;
 904
 905         return 0;
 906 }
 907
 908 static int mtk_pctrl_build_state(struct platform_device *pdev)
 909 {
 910         struct mtk_pinctrl *hw = platform_get_drvdata(pdev);
 911         int i;
 912
 913         /* Allocate groups */
 914         hw->groups = devm_kmalloc_array(&pdev->dev, hw->soc->ngrps,
 915                                         sizeof(*hw->groups), GFP_KERNEL);
 916         if (!hw->groups)
 917                 return -ENOMEM;
 918
 919         /* We assume that one pin is one group, use pin name as group name. */
 920         hw->grp_names = devm_kmalloc_array(&pdev->dev, hw->soc->ngrps,
 921                                            sizeof(*hw->grp_names), GFP_KERNEL);
 922         if (!hw->grp_names)
 923                 return -ENOMEM;
 924
 925         for (i = 0; i < hw->soc->npins; i++) {
 926                 const struct mtk_pin_desc *pin = hw->soc->pins + i;
 927                 struct mtk_pinctrl_group *group = hw->groups + i;
 928
 929                 group->name = pin->name;
 930                 group->pin = pin->number;
 931
 932                 hw->grp_names[i] = pin->name;
 933         }
 934
 935         return 0;
 936 }
 937
 938 int mtk_paris_pinctrl_probe(struct platform_device *pdev,
 939                             const struct mtk_pin_soc *soc)
 940 {
 941         struct pinctrl_pin_desc *pins;
 942         struct mtk_pinctrl *hw;
 943         int err, i;
 944
 945         hw = devm_kzalloc(&pdev->dev, sizeof(*hw), GFP_KERNEL);
 946         if (!hw)
 947                 return -ENOMEM;
 948
 949         platform_set_drvdata(pdev, hw);
 950         hw->soc = soc;
 951         hw->dev = &pdev->dev;
 952
 953         if (!hw->soc->nbase_names) {
 954                 dev_err(&pdev->dev,
 955                         "SoC should be assigned at least one register base\n");
 956                 return -EINVAL;
 957         }
 958
 959         hw->base = devm_kmalloc_array(&pdev->dev, hw->soc->nbase_names,
 960                                       sizeof(*hw->base), GFP_KERNEL);
 961         if (!hw->base)
 962                 return -ENOMEM;
 963
 964         for (i = 0; i < hw->soc->nbase_names; i++) {
 965                 hw->base[i] = devm_platform_ioremap_resource_byname(pdev,
 966                                         hw->soc->base_names[i]);
 967                 if (IS_ERR(hw->base[i]))
 968                         return PTR_ERR(hw->base[i]);
 969         }
 970
 971         hw->nbase = hw->soc->nbase_names;
 972
 973         spin_lock_init(&hw->lock);
 974
 975         err = mtk_pctrl_build_state(pdev);
 976         if (err) {
 977                 dev_err(&pdev->dev, "build state failed: %d\n", err);
 978                 return -EINVAL;
 979         }
 980
 981         /* Copy from internal struct mtk_pin_desc to register to the core */
 982         pins = devm_kmalloc_array(&pdev->dev, hw->soc->npins, sizeof(*pins),
 983                                   GFP_KERNEL);
 984         if (!pins)
 985                 return -ENOMEM;
 986
 987         for (i = 0; i < hw->soc->npins; i++) {
 988                 pins[i].number = hw->soc->pins[i].number;
 989                 pins[i].name = hw->soc->pins[i].name;
 990         }
 991
 992         /* Setup pins descriptions per SoC types */
 993         mtk_desc.pins = (const struct pinctrl_pin_desc *)pins;
 994         mtk_desc.npins = hw->soc->npins;
 995         mtk_desc.num_custom_params = ARRAY_SIZE(mtk_custom_bindings);
 996         mtk_desc.custom_params = mtk_custom_bindings;
 997 #ifdef CONFIG_DEBUG_FS
 998         mtk_desc.custom_conf_items = mtk_conf_items;
 999 #endif
1000
1001         err = devm_pinctrl_register_and_init(&pdev->dev, &mtk_desc, hw,
1002                                              &hw->pctrl);
1003         if (err)
1004                 return err;
1005
1006         err = pinctrl_enable(hw->pctrl);
1007         if (err)
1008                 return err;
1009
1010         err = mtk_build_eint(hw, pdev);
1011         if (err)
1012                 dev_warn(&pdev->dev,
1013                          "Failed to add EINT, but pinctrl still can work\n");
1014
1015         /* Build gpiochip should be after pinctrl_enable is done */
1016         err = mtk_build_gpiochip(hw, pdev->dev.of_node);
1017         if (err) {
1018                 dev_err(&pdev->dev, "Failed to add gpio_chip\n");
1019                 return err;
1020         }
1021
1022         platform_set_drvdata(pdev, hw);
1023
1024         return 0;
1025 }
1026 EXPORT_SYMBOL_GPL(mtk_paris_pinctrl_probe);
1027
1028 static int mtk_paris_pinctrl_suspend(struct device *device)
1029 {
1030         struct mtk_pinctrl *pctl = dev_get_drvdata(device);
1031
1032         return mtk_eint_do_suspend(pctl->eint);
1033 }
1034
1035 static int mtk_paris_pinctrl_resume(struct device *device)
1036 {
1037         struct mtk_pinctrl *pctl = dev_get_drvdata(device);
1038
1039         return mtk_eint_do_resume(pctl->eint);
1040 }
1041
1042 const struct dev_pm_ops mtk_paris_pinctrl_pm_ops = {
1043         .suspend_noirq = mtk_paris_pinctrl_suspend,
1044         .resume_noirq = mtk_paris_pinctrl_resume,
1045 };
1046
1047 MODULE_LICENSE("GPL v2");
1048 MODULE_DESCRIPTION("MediaTek Pinctrl Common Driver V2 Paris");