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 <linux/seq_file.h> 15 16 #include <linux/pinctrl/consumer.h> 17 18 #include <dt-bindings/pinctrl/mt65xx.h> 19 20 #include "pinctrl-paris.h" 21 22 #define PINCTRL_PINCTRL_DEV KBUILD_MODNAME 23 24 /* Custom pinconf parameters */ 25 #define MTK_PIN_CONFIG_TDSEL (PIN_CONFIG_END + 1) 26 #define MTK_PIN_CONFIG_RDSEL (PIN_CONFIG_END + 2) 27 #define MTK_PIN_CONFIG_PU_ADV (PIN_CONFIG_END + 3) 28 #define MTK_PIN_CONFIG_PD_ADV (PIN_CONFIG_END + 4) 29 #define MTK_PIN_CONFIG_DRV_ADV (PIN_CONFIG_END + 5) 30 31 static const struct pinconf_generic_params mtk_custom_bindings[] = { 32 {"mediatek,tdsel", MTK_PIN_CONFIG_TDSEL, 0}, 33 {"mediatek,rdsel", MTK_PIN_CONFIG_RDSEL, 0}, 34 {"mediatek,pull-up-adv", MTK_PIN_CONFIG_PU_ADV, 1}, 35 {"mediatek,pull-down-adv", MTK_PIN_CONFIG_PD_ADV, 1}, 36 {"mediatek,drive-strength-adv", MTK_PIN_CONFIG_DRV_ADV, 2}, 37 }; 38 39 #ifdef CONFIG_DEBUG_FS 40 static const struct pin_config_item mtk_conf_items[] = { 41 PCONFDUMP(MTK_PIN_CONFIG_TDSEL, "tdsel", NULL, true), 42 PCONFDUMP(MTK_PIN_CONFIG_RDSEL, "rdsel", NULL, true), 43 PCONFDUMP(MTK_PIN_CONFIG_PU_ADV, "pu-adv", NULL, true), 44 PCONFDUMP(MTK_PIN_CONFIG_PD_ADV, "pd-adv", NULL, true), 45 PCONFDUMP(MTK_PIN_CONFIG_DRV_ADV, "drive-strength-adv", NULL, true), 46 }; 47 #endif 48 49 static const char * const mtk_gpio_functions[] = { 50 "func0", "func1", "func2", "func3", 51 "func4", "func5", "func6", "func7", 52 "func8", "func9", "func10", "func11", 53 "func12", "func13", "func14", "func15", 54 }; 55 56 /* 57 * This section supports converting to/from custom MTK_PIN_CONFIG_DRV_ADV 58 * and standard PIN_CONFIG_DRIVE_STRENGTH_UA pin configs. 59 * 60 * The custom value encodes three hardware bits as follows: 61 * 62 * | Bits | 63 * | 2 (E1) | 1 (E0) | 0 (EN) | drive strength (uA) 64 * ------------------------------------------------ 65 * | x | x | 0 | disabled, use standard drive strength 66 * ------------------------------------- 67 * | 0 | 0 | 1 | 125 uA 68 * | 0 | 1 | 1 | 250 uA 69 * | 1 | 0 | 1 | 500 uA 70 * | 1 | 1 | 1 | 1000 uA 71 */ 72 static const int mtk_drv_adv_uA[] = { 125, 250, 500, 1000 }; 73 74 static int mtk_drv_adv_to_uA(int val) 75 { 76 /* This should never happen. */ 77 if (WARN_ON_ONCE(val < 0 || val > 7)) 78 return -EINVAL; 79 80 /* Bit 0 simply enables this hardware part */ 81 if (!(val & BIT(0))) 82 return -EINVAL; 83 84 return mtk_drv_adv_uA[(val >> 1)]; 85 } 86 87 static int mtk_drv_uA_to_adv(int val) 88 { 89 switch (val) { 90 case 125: 91 return 0x1; 92 case 250: 93 return 0x3; 94 case 500: 95 return 0x5; 96 case 1000: 97 return 0x7; 98 } 99 100 return -EINVAL; 101 } 102 103 static int mtk_pinmux_gpio_request_enable(struct pinctrl_dev *pctldev, 104 struct pinctrl_gpio_range *range, 105 unsigned int pin) 106 { 107 struct mtk_pinctrl *hw = pinctrl_dev_get_drvdata(pctldev); 108 const struct mtk_pin_desc *desc; 109 110 desc = (const struct mtk_pin_desc *)&hw->soc->pins[pin]; 111 112 return mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_MODE, 113 hw->soc->gpio_m); 114 } 115 116 static int mtk_pinmux_gpio_set_direction(struct pinctrl_dev *pctldev, 117 struct pinctrl_gpio_range *range, 118 unsigned int pin, bool input) 119 { 120 struct mtk_pinctrl *hw = pinctrl_dev_get_drvdata(pctldev); 121 const struct mtk_pin_desc *desc; 122 123 desc = (const struct mtk_pin_desc *)&hw->soc->pins[pin]; 124 125 /* hardware would take 0 as input direction */ 126 return mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_DIR, !input); 127 } 128 129 static int mtk_pinconf_get(struct pinctrl_dev *pctldev, 130 unsigned int pin, unsigned long *config) 131 { 132 struct mtk_pinctrl *hw = pinctrl_dev_get_drvdata(pctldev); 133 u32 param = pinconf_to_config_param(*config); 134 int pullup, reg, err = -ENOTSUPP, ret = 1; 135 const struct mtk_pin_desc *desc; 136 137 if (pin >= hw->soc->npins) 138 return -EINVAL; 139 140 desc = (const struct mtk_pin_desc *)&hw->soc->pins[pin]; 141 142 switch (param) { 143 case PIN_CONFIG_BIAS_DISABLE: 144 case PIN_CONFIG_BIAS_PULL_UP: 145 case PIN_CONFIG_BIAS_PULL_DOWN: 146 if (!hw->soc->bias_get_combo) 147 break; 148 err = hw->soc->bias_get_combo(hw, desc, &pullup, &ret); 149 if (err) 150 break; 151 if (ret == MTK_PUPD_SET_R1R0_00) 152 ret = MTK_DISABLE; 153 if (param == PIN_CONFIG_BIAS_DISABLE) { 154 if (ret != MTK_DISABLE) 155 err = -EINVAL; 156 } else if (param == PIN_CONFIG_BIAS_PULL_UP) { 157 if (!pullup || ret == MTK_DISABLE) 158 err = -EINVAL; 159 } else if (param == PIN_CONFIG_BIAS_PULL_DOWN) { 160 if (pullup || ret == MTK_DISABLE) 161 err = -EINVAL; 162 } 163 break; 164 case PIN_CONFIG_SLEW_RATE: 165 err = mtk_hw_get_value(hw, desc, PINCTRL_PIN_REG_SR, &ret); 166 break; 167 case PIN_CONFIG_INPUT_ENABLE: 168 err = mtk_hw_get_value(hw, desc, PINCTRL_PIN_REG_IES, &ret); 169 if (!ret) 170 err = -EINVAL; 171 break; 172 case PIN_CONFIG_OUTPUT: 173 err = mtk_hw_get_value(hw, desc, PINCTRL_PIN_REG_DIR, &ret); 174 if (err) 175 break; 176 177 if (!ret) { 178 err = -EINVAL; 179 break; 180 } 181 182 err = mtk_hw_get_value(hw, desc, PINCTRL_PIN_REG_DO, &ret); 183 break; 184 case PIN_CONFIG_INPUT_SCHMITT_ENABLE: 185 err = mtk_hw_get_value(hw, desc, PINCTRL_PIN_REG_DIR, &ret); 186 if (err) 187 break; 188 /* return error when in output mode 189 * because schmitt trigger only work in input mode 190 */ 191 if (ret) { 192 err = -EINVAL; 193 break; 194 } 195 196 err = mtk_hw_get_value(hw, desc, PINCTRL_PIN_REG_SMT, &ret); 197 if (!ret) 198 err = -EINVAL; 199 break; 200 case PIN_CONFIG_DRIVE_STRENGTH: 201 if (!hw->soc->drive_get) 202 break; 203 204 if (hw->soc->adv_drive_get) { 205 err = hw->soc->adv_drive_get(hw, desc, &ret); 206 if (!err) { 207 err = mtk_drv_adv_to_uA(ret); 208 if (err > 0) { 209 /* PIN_CONFIG_DRIVE_STRENGTH_UA used */ 210 err = -EINVAL; 211 break; 212 } 213 } 214 } 215 216 err = hw->soc->drive_get(hw, desc, &ret); 217 break; 218 case PIN_CONFIG_DRIVE_STRENGTH_UA: 219 if (!hw->soc->adv_drive_get) 220 break; 221 222 err = hw->soc->adv_drive_get(hw, desc, &ret); 223 if (err) 224 break; 225 err = mtk_drv_adv_to_uA(ret); 226 if (err < 0) 227 break; 228 229 ret = err; 230 err = 0; 231 break; 232 case MTK_PIN_CONFIG_TDSEL: 233 case MTK_PIN_CONFIG_RDSEL: 234 reg = (param == MTK_PIN_CONFIG_TDSEL) ? 235 PINCTRL_PIN_REG_TDSEL : PINCTRL_PIN_REG_RDSEL; 236 err = mtk_hw_get_value(hw, desc, reg, &ret); 237 break; 238 case MTK_PIN_CONFIG_PU_ADV: 239 case MTK_PIN_CONFIG_PD_ADV: 240 if (!hw->soc->adv_pull_get) 241 break; 242 pullup = param == MTK_PIN_CONFIG_PU_ADV; 243 err = hw->soc->adv_pull_get(hw, desc, pullup, &ret); 244 break; 245 case MTK_PIN_CONFIG_DRV_ADV: 246 if (!hw->soc->adv_drive_get) 247 break; 248 err = hw->soc->adv_drive_get(hw, desc, &ret); 249 break; 250 } 251 252 if (!err) 253 *config = pinconf_to_config_packed(param, ret); 254 255 return err; 256 } 257 258 static int mtk_pinconf_set(struct pinctrl_dev *pctldev, unsigned int pin, 259 enum pin_config_param param, u32 arg) 260 { 261 struct mtk_pinctrl *hw = pinctrl_dev_get_drvdata(pctldev); 262 const struct mtk_pin_desc *desc; 263 int err = -ENOTSUPP; 264 u32 reg; 265 266 if (pin >= hw->soc->npins) 267 return -EINVAL; 268 269 desc = (const struct mtk_pin_desc *)&hw->soc->pins[pin]; 270 271 switch ((u32)param) { 272 case PIN_CONFIG_BIAS_DISABLE: 273 if (!hw->soc->bias_set_combo) 274 break; 275 err = hw->soc->bias_set_combo(hw, desc, 0, MTK_DISABLE); 276 break; 277 case PIN_CONFIG_BIAS_PULL_UP: 278 if (!hw->soc->bias_set_combo) 279 break; 280 err = hw->soc->bias_set_combo(hw, desc, 1, arg); 281 break; 282 case PIN_CONFIG_BIAS_PULL_DOWN: 283 if (!hw->soc->bias_set_combo) 284 break; 285 err = hw->soc->bias_set_combo(hw, desc, 0, arg); 286 break; 287 case PIN_CONFIG_INPUT_ENABLE: 288 /* regard all non-zero value as enable */ 289 err = mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_IES, !!arg); 290 break; 291 case PIN_CONFIG_SLEW_RATE: 292 /* regard all non-zero value as enable */ 293 err = mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_SR, !!arg); 294 break; 295 case PIN_CONFIG_OUTPUT: 296 err = mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_DO, 297 arg); 298 if (err) 299 break; 300 301 err = mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_DIR, 302 MTK_OUTPUT); 303 break; 304 case PIN_CONFIG_INPUT_SCHMITT: 305 case PIN_CONFIG_INPUT_SCHMITT_ENABLE: 306 /* arg = 1: Input mode & SMT enable ; 307 * arg = 0: Output mode & SMT disable 308 */ 309 err = mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_DIR, !arg); 310 if (err) 311 break; 312 313 err = mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_SMT, !!arg); 314 break; 315 case PIN_CONFIG_DRIVE_STRENGTH: 316 if (!hw->soc->drive_set) 317 break; 318 err = hw->soc->drive_set(hw, desc, arg); 319 break; 320 case PIN_CONFIG_DRIVE_STRENGTH_UA: 321 if (!hw->soc->adv_drive_set) 322 break; 323 324 err = mtk_drv_uA_to_adv(arg); 325 if (err < 0) 326 break; 327 err = hw->soc->adv_drive_set(hw, desc, err); 328 break; 329 case MTK_PIN_CONFIG_TDSEL: 330 case MTK_PIN_CONFIG_RDSEL: 331 reg = (param == MTK_PIN_CONFIG_TDSEL) ? 332 PINCTRL_PIN_REG_TDSEL : PINCTRL_PIN_REG_RDSEL; 333 err = mtk_hw_set_value(hw, desc, reg, arg); 334 break; 335 case MTK_PIN_CONFIG_PU_ADV: 336 case MTK_PIN_CONFIG_PD_ADV: 337 if (!hw->soc->adv_pull_set) 338 break; 339 err = hw->soc->adv_pull_set(hw, desc, 340 (param == MTK_PIN_CONFIG_PU_ADV), 341 arg); 342 break; 343 case MTK_PIN_CONFIG_DRV_ADV: 344 if (!hw->soc->adv_drive_set) 345 break; 346 err = hw->soc->adv_drive_set(hw, desc, arg); 347 break; 348 } 349 350 return err; 351 } 352 353 static struct mtk_pinctrl_group * 354 mtk_pctrl_find_group_by_pin(struct mtk_pinctrl *hw, u32 pin) 355 { 356 int i; 357 358 for (i = 0; i < hw->soc->ngrps; i++) { 359 struct mtk_pinctrl_group *grp = hw->groups + i; 360 361 if (grp->pin == pin) 362 return grp; 363 } 364 365 return NULL; 366 } 367 368 static const struct mtk_func_desc * 369 mtk_pctrl_find_function_by_pin(struct mtk_pinctrl *hw, u32 pin_num, u32 fnum) 370 { 371 const struct mtk_pin_desc *pin = hw->soc->pins + pin_num; 372 const struct mtk_func_desc *func = pin->funcs; 373 374 while (func && func->name) { 375 if (func->muxval == fnum) 376 return func; 377 func++; 378 } 379 380 return NULL; 381 } 382 383 static bool mtk_pctrl_is_function_valid(struct mtk_pinctrl *hw, u32 pin_num, 384 u32 fnum) 385 { 386 int i; 387 388 for (i = 0; i < hw->soc->npins; i++) { 389 const struct mtk_pin_desc *pin = hw->soc->pins + i; 390 391 if (pin->number == pin_num) { 392 const struct mtk_func_desc *func = pin->funcs; 393 394 while (func && func->name) { 395 if (func->muxval == fnum) 396 return true; 397 func++; 398 } 399 400 break; 401 } 402 } 403 404 return false; 405 } 406 407 static int mtk_pctrl_dt_node_to_map_func(struct mtk_pinctrl *pctl, 408 u32 pin, u32 fnum, 409 struct mtk_pinctrl_group *grp, 410 struct pinctrl_map **map, 411 unsigned *reserved_maps, 412 unsigned *num_maps) 413 { 414 bool ret; 415 416 if (*num_maps == *reserved_maps) 417 return -ENOSPC; 418 419 (*map)[*num_maps].type = PIN_MAP_TYPE_MUX_GROUP; 420 (*map)[*num_maps].data.mux.group = grp->name; 421 422 ret = mtk_pctrl_is_function_valid(pctl, pin, fnum); 423 if (!ret) { 424 dev_err(pctl->dev, "invalid function %d on pin %d .\n", 425 fnum, pin); 426 return -EINVAL; 427 } 428 429 (*map)[*num_maps].data.mux.function = mtk_gpio_functions[fnum]; 430 (*num_maps)++; 431 432 return 0; 433 } 434 435 static int mtk_pctrl_dt_subnode_to_map(struct pinctrl_dev *pctldev, 436 struct device_node *node, 437 struct pinctrl_map **map, 438 unsigned *reserved_maps, 439 unsigned *num_maps) 440 { 441 struct mtk_pinctrl *hw = pinctrl_dev_get_drvdata(pctldev); 442 int num_pins, num_funcs, maps_per_pin, i, err; 443 struct mtk_pinctrl_group *grp; 444 unsigned int num_configs; 445 bool has_config = false; 446 unsigned long *configs; 447 u32 pinfunc, pin, func; 448 struct property *pins; 449 unsigned reserve = 0; 450 451 pins = of_find_property(node, "pinmux", NULL); 452 if (!pins) { 453 dev_err(hw->dev, "missing pins property in node %pOFn .\n", 454 node); 455 return -EINVAL; 456 } 457 458 err = pinconf_generic_parse_dt_config(node, pctldev, &configs, 459 &num_configs); 460 if (err) 461 return err; 462 463 if (num_configs) 464 has_config = true; 465 466 num_pins = pins->length / sizeof(u32); 467 num_funcs = num_pins; 468 maps_per_pin = 0; 469 if (num_funcs) 470 maps_per_pin++; 471 if (has_config && num_pins >= 1) 472 maps_per_pin++; 473 474 if (!num_pins || !maps_per_pin) { 475 err = -EINVAL; 476 goto exit; 477 } 478 479 reserve = num_pins * maps_per_pin; 480 481 err = pinctrl_utils_reserve_map(pctldev, map, reserved_maps, num_maps, 482 reserve); 483 if (err < 0) 484 goto exit; 485 486 for (i = 0; i < num_pins; i++) { 487 err = of_property_read_u32_index(node, "pinmux", i, &pinfunc); 488 if (err) 489 goto exit; 490 491 pin = MTK_GET_PIN_NO(pinfunc); 492 func = MTK_GET_PIN_FUNC(pinfunc); 493 494 if (pin >= hw->soc->npins || 495 func >= ARRAY_SIZE(mtk_gpio_functions)) { 496 dev_err(hw->dev, "invalid pins value.\n"); 497 err = -EINVAL; 498 goto exit; 499 } 500 501 grp = mtk_pctrl_find_group_by_pin(hw, pin); 502 if (!grp) { 503 dev_err(hw->dev, "unable to match pin %d to group\n", 504 pin); 505 err = -EINVAL; 506 goto exit; 507 } 508 509 err = mtk_pctrl_dt_node_to_map_func(hw, pin, func, grp, map, 510 reserved_maps, num_maps); 511 if (err < 0) 512 goto exit; 513 514 if (has_config) { 515 err = pinctrl_utils_add_map_configs(pctldev, map, 516 reserved_maps, 517 num_maps, 518 grp->name, 519 configs, 520 num_configs, 521 PIN_MAP_TYPE_CONFIGS_GROUP); 522 if (err < 0) 523 goto exit; 524 } 525 } 526 527 err = 0; 528 529 exit: 530 kfree(configs); 531 return err; 532 } 533 534 static int mtk_pctrl_dt_node_to_map(struct pinctrl_dev *pctldev, 535 struct device_node *np_config, 536 struct pinctrl_map **map, 537 unsigned *num_maps) 538 { 539 unsigned reserved_maps; 540 int ret; 541 542 *map = NULL; 543 *num_maps = 0; 544 reserved_maps = 0; 545 546 for_each_child_of_node_scoped(np_config, np) { 547 ret = mtk_pctrl_dt_subnode_to_map(pctldev, np, map, 548 &reserved_maps, 549 num_maps); 550 if (ret < 0) { 551 pinctrl_utils_free_map(pctldev, *map, *num_maps); 552 return ret; 553 } 554 } 555 556 return 0; 557 } 558 559 static int mtk_pctrl_get_groups_count(struct pinctrl_dev *pctldev) 560 { 561 struct mtk_pinctrl *hw = pinctrl_dev_get_drvdata(pctldev); 562 563 return hw->soc->ngrps; 564 } 565 566 static const char *mtk_pctrl_get_group_name(struct pinctrl_dev *pctldev, 567 unsigned group) 568 { 569 struct mtk_pinctrl *hw = pinctrl_dev_get_drvdata(pctldev); 570 571 return hw->groups[group].name; 572 } 573 574 static int mtk_pctrl_get_group_pins(struct pinctrl_dev *pctldev, 575 unsigned group, const unsigned **pins, 576 unsigned *num_pins) 577 { 578 struct mtk_pinctrl *hw = pinctrl_dev_get_drvdata(pctldev); 579 580 *pins = (unsigned *)&hw->groups[group].pin; 581 *num_pins = 1; 582 583 return 0; 584 } 585 586 static int mtk_hw_get_value_wrap(struct mtk_pinctrl *hw, unsigned int gpio, int field) 587 { 588 const struct mtk_pin_desc *desc; 589 int value, err; 590 591 if (gpio >= hw->soc->npins) 592 return -EINVAL; 593 594 desc = (const struct mtk_pin_desc *)&hw->soc->pins[gpio]; 595 596 err = mtk_hw_get_value(hw, desc, field, &value); 597 if (err) 598 return err; 599 600 return value; 601 } 602 603 #define mtk_pctrl_get_pinmux(hw, gpio) \ 604 mtk_hw_get_value_wrap(hw, gpio, PINCTRL_PIN_REG_MODE) 605 606 #define mtk_pctrl_get_direction(hw, gpio) \ 607 mtk_hw_get_value_wrap(hw, gpio, PINCTRL_PIN_REG_DIR) 608 609 #define mtk_pctrl_get_out(hw, gpio) \ 610 mtk_hw_get_value_wrap(hw, gpio, PINCTRL_PIN_REG_DO) 611 612 #define mtk_pctrl_get_in(hw, gpio) \ 613 mtk_hw_get_value_wrap(hw, gpio, PINCTRL_PIN_REG_DI) 614 615 #define mtk_pctrl_get_smt(hw, gpio) \ 616 mtk_hw_get_value_wrap(hw, gpio, PINCTRL_PIN_REG_SMT) 617 618 #define mtk_pctrl_get_ies(hw, gpio) \ 619 mtk_hw_get_value_wrap(hw, gpio, PINCTRL_PIN_REG_IES) 620 621 #define mtk_pctrl_get_driving(hw, gpio) \ 622 mtk_hw_get_value_wrap(hw, gpio, PINCTRL_PIN_REG_DRV) 623 624 ssize_t mtk_pctrl_show_one_pin(struct mtk_pinctrl *hw, 625 unsigned int gpio, char *buf, unsigned int buf_len) 626 { 627 int pinmux, pullup = 0, pullen = 0, len = 0, r1 = -1, r0 = -1, rsel = -1; 628 const struct mtk_pin_desc *desc; 629 u32 try_all_type = 0; 630 631 if (gpio >= hw->soc->npins) 632 return -EINVAL; 633 634 if (mtk_is_virt_gpio(hw, gpio)) 635 return -EINVAL; 636 637 desc = (const struct mtk_pin_desc *)&hw->soc->pins[gpio]; 638 pinmux = mtk_pctrl_get_pinmux(hw, gpio); 639 if (pinmux >= hw->soc->nfuncs) 640 pinmux -= hw->soc->nfuncs; 641 642 mtk_pinconf_bias_get_combo(hw, desc, &pullup, &pullen); 643 644 if (hw->soc->pull_type) 645 try_all_type = hw->soc->pull_type[desc->number]; 646 647 if (hw->rsel_si_unit && (try_all_type & MTK_PULL_RSEL_TYPE)) { 648 rsel = pullen; 649 pullen = 1; 650 } else { 651 /* Case for: R1R0 */ 652 if (pullen == MTK_PUPD_SET_R1R0_00) { 653 pullen = 0; 654 r1 = 0; 655 r0 = 0; 656 } else if (pullen == MTK_PUPD_SET_R1R0_01) { 657 pullen = 1; 658 r1 = 0; 659 r0 = 1; 660 } else if (pullen == MTK_PUPD_SET_R1R0_10) { 661 pullen = 1; 662 r1 = 1; 663 r0 = 0; 664 } else if (pullen == MTK_PUPD_SET_R1R0_11) { 665 pullen = 1; 666 r1 = 1; 667 r0 = 1; 668 } 669 670 /* Case for: RSEL */ 671 if (pullen >= MTK_PULL_SET_RSEL_000 && 672 pullen <= MTK_PULL_SET_RSEL_111) { 673 rsel = pullen - MTK_PULL_SET_RSEL_000; 674 pullen = 1; 675 } 676 } 677 len += scnprintf(buf + len, buf_len - len, 678 "%03d: %1d%1d%1d%1d%02d%1d%1d%1d%1d", 679 gpio, 680 pinmux, 681 mtk_pctrl_get_direction(hw, gpio), 682 mtk_pctrl_get_out(hw, gpio), 683 mtk_pctrl_get_in(hw, gpio), 684 mtk_pctrl_get_driving(hw, gpio), 685 mtk_pctrl_get_smt(hw, gpio), 686 mtk_pctrl_get_ies(hw, gpio), 687 pullen, 688 pullup); 689 690 if (r1 != -1) 691 len += scnprintf(buf + len, buf_len - len, " (%1d %1d)", r1, r0); 692 else if (rsel != -1) 693 len += scnprintf(buf + len, buf_len - len, " (%1d)", rsel); 694 695 return len; 696 } 697 EXPORT_SYMBOL_GPL(mtk_pctrl_show_one_pin); 698 699 #define PIN_DBG_BUF_SZ 96 700 static void mtk_pctrl_dbg_show(struct pinctrl_dev *pctldev, struct seq_file *s, 701 unsigned int gpio) 702 { 703 struct mtk_pinctrl *hw = pinctrl_dev_get_drvdata(pctldev); 704 char buf[PIN_DBG_BUF_SZ] = { 0 }; 705 706 (void)mtk_pctrl_show_one_pin(hw, gpio, buf, PIN_DBG_BUF_SZ); 707 708 seq_printf(s, "%s", buf); 709 } 710 711 static const struct pinctrl_ops mtk_pctlops = { 712 .dt_node_to_map = mtk_pctrl_dt_node_to_map, 713 .dt_free_map = pinctrl_utils_free_map, 714 .get_groups_count = mtk_pctrl_get_groups_count, 715 .get_group_name = mtk_pctrl_get_group_name, 716 .get_group_pins = mtk_pctrl_get_group_pins, 717 .pin_dbg_show = mtk_pctrl_dbg_show, 718 }; 719 720 static int mtk_pmx_get_funcs_cnt(struct pinctrl_dev *pctldev) 721 { 722 return ARRAY_SIZE(mtk_gpio_functions); 723 } 724 725 static const char *mtk_pmx_get_func_name(struct pinctrl_dev *pctldev, 726 unsigned selector) 727 { 728 return mtk_gpio_functions[selector]; 729 } 730 731 static int mtk_pmx_get_func_groups(struct pinctrl_dev *pctldev, 732 unsigned function, 733 const char * const **groups, 734 unsigned * const num_groups) 735 { 736 struct mtk_pinctrl *hw = pinctrl_dev_get_drvdata(pctldev); 737 738 *groups = hw->grp_names; 739 *num_groups = hw->soc->ngrps; 740 741 return 0; 742 } 743 744 static int mtk_pmx_set_mux(struct pinctrl_dev *pctldev, 745 unsigned function, 746 unsigned group) 747 { 748 struct mtk_pinctrl *hw = pinctrl_dev_get_drvdata(pctldev); 749 struct mtk_pinctrl_group *grp = hw->groups + group; 750 const struct mtk_func_desc *desc_func; 751 const struct mtk_pin_desc *desc; 752 bool ret; 753 754 ret = mtk_pctrl_is_function_valid(hw, grp->pin, function); 755 if (!ret) { 756 dev_err(hw->dev, "invalid function %d on group %d .\n", 757 function, group); 758 return -EINVAL; 759 } 760 761 desc_func = mtk_pctrl_find_function_by_pin(hw, grp->pin, function); 762 if (!desc_func) 763 return -EINVAL; 764 765 desc = (const struct mtk_pin_desc *)&hw->soc->pins[grp->pin]; 766 return mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_MODE, desc_func->muxval); 767 } 768 769 static const struct pinmux_ops mtk_pmxops = { 770 .get_functions_count = mtk_pmx_get_funcs_cnt, 771 .get_function_name = mtk_pmx_get_func_name, 772 .get_function_groups = mtk_pmx_get_func_groups, 773 .set_mux = mtk_pmx_set_mux, 774 .gpio_set_direction = mtk_pinmux_gpio_set_direction, 775 .gpio_request_enable = mtk_pinmux_gpio_request_enable, 776 }; 777 778 static int mtk_pconf_group_get(struct pinctrl_dev *pctldev, unsigned group, 779 unsigned long *config) 780 { 781 struct mtk_pinctrl *hw = pinctrl_dev_get_drvdata(pctldev); 782 struct mtk_pinctrl_group *grp = &hw->groups[group]; 783 784 /* One pin per group only */ 785 return mtk_pinconf_get(pctldev, grp->pin, config); 786 } 787 788 static int mtk_pconf_group_set(struct pinctrl_dev *pctldev, unsigned group, 789 unsigned long *configs, unsigned num_configs) 790 { 791 struct mtk_pinctrl *hw = pinctrl_dev_get_drvdata(pctldev); 792 struct mtk_pinctrl_group *grp = &hw->groups[group]; 793 bool drive_strength_uA_found = false; 794 bool adv_drve_strength_found = false; 795 int i, ret; 796 797 for (i = 0; i < num_configs; i++) { 798 ret = mtk_pinconf_set(pctldev, grp->pin, 799 pinconf_to_config_param(configs[i]), 800 pinconf_to_config_argument(configs[i])); 801 if (ret < 0) 802 return ret; 803 804 if (pinconf_to_config_param(configs[i]) == PIN_CONFIG_DRIVE_STRENGTH_UA) 805 drive_strength_uA_found = true; 806 if (pinconf_to_config_param(configs[i]) == MTK_PIN_CONFIG_DRV_ADV) 807 adv_drve_strength_found = true; 808 } 809 810 /* 811 * Disable advanced drive strength mode if drive-strength-microamp 812 * is not set. However, mediatek,drive-strength-adv takes precedence 813 * as its value can explicitly request the mode be enabled or not. 814 */ 815 if (hw->soc->adv_drive_set && !drive_strength_uA_found && 816 !adv_drve_strength_found) 817 hw->soc->adv_drive_set(hw, &hw->soc->pins[grp->pin], 0); 818 819 return 0; 820 } 821 822 static const struct pinconf_ops mtk_confops = { 823 .pin_config_get = mtk_pinconf_get, 824 .pin_config_group_get = mtk_pconf_group_get, 825 .pin_config_group_set = mtk_pconf_group_set, 826 .is_generic = true, 827 }; 828 829 static struct pinctrl_desc mtk_desc = { 830 .name = PINCTRL_PINCTRL_DEV, 831 .pctlops = &mtk_pctlops, 832 .pmxops = &mtk_pmxops, 833 .confops = &mtk_confops, 834 .owner = THIS_MODULE, 835 }; 836 837 static int mtk_gpio_get_direction(struct gpio_chip *chip, unsigned int gpio) 838 { 839 struct mtk_pinctrl *hw = gpiochip_get_data(chip); 840 const struct mtk_pin_desc *desc; 841 int value, err; 842 843 if (gpio >= hw->soc->npins) 844 return -EINVAL; 845 846 /* 847 * "Virtual" GPIOs are always and only used for interrupts 848 * Since they are only used for interrupts, they are always inputs 849 */ 850 if (mtk_is_virt_gpio(hw, gpio)) 851 return 1; 852 853 desc = (const struct mtk_pin_desc *)&hw->soc->pins[gpio]; 854 855 err = mtk_hw_get_value(hw, desc, PINCTRL_PIN_REG_DIR, &value); 856 if (err) 857 return err; 858 859 if (value) 860 return GPIO_LINE_DIRECTION_OUT; 861 862 return GPIO_LINE_DIRECTION_IN; 863 } 864 865 static int mtk_gpio_get(struct gpio_chip *chip, unsigned int gpio) 866 { 867 struct mtk_pinctrl *hw = gpiochip_get_data(chip); 868 const struct mtk_pin_desc *desc; 869 int value, err; 870 871 if (gpio >= hw->soc->npins) 872 return -EINVAL; 873 874 desc = (const struct mtk_pin_desc *)&hw->soc->pins[gpio]; 875 876 err = mtk_hw_get_value(hw, desc, PINCTRL_PIN_REG_DI, &value); 877 if (err) 878 return err; 879 880 return !!value; 881 } 882 883 static void mtk_gpio_set(struct gpio_chip *chip, unsigned int gpio, int value) 884 { 885 struct mtk_pinctrl *hw = gpiochip_get_data(chip); 886 const struct mtk_pin_desc *desc; 887 888 if (gpio >= hw->soc->npins) 889 return; 890 891 desc = (const struct mtk_pin_desc *)&hw->soc->pins[gpio]; 892 893 mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_DO, !!value); 894 } 895 896 static int mtk_gpio_direction_input(struct gpio_chip *chip, unsigned int gpio) 897 { 898 struct mtk_pinctrl *hw = gpiochip_get_data(chip); 899 900 if (gpio >= hw->soc->npins) 901 return -EINVAL; 902 903 return pinctrl_gpio_direction_input(chip, gpio); 904 } 905 906 static int mtk_gpio_direction_output(struct gpio_chip *chip, unsigned int gpio, 907 int value) 908 { 909 struct mtk_pinctrl *hw = gpiochip_get_data(chip); 910 911 if (gpio >= hw->soc->npins) 912 return -EINVAL; 913 914 mtk_gpio_set(chip, gpio, value); 915 916 return pinctrl_gpio_direction_output(chip, gpio); 917 } 918 919 static int mtk_gpio_to_irq(struct gpio_chip *chip, unsigned int offset) 920 { 921 struct mtk_pinctrl *hw = gpiochip_get_data(chip); 922 const struct mtk_pin_desc *desc; 923 924 if (!hw->eint) 925 return -ENOTSUPP; 926 927 desc = (const struct mtk_pin_desc *)&hw->soc->pins[offset]; 928 929 if (desc->eint.eint_n == EINT_NA) 930 return -ENOTSUPP; 931 932 return mtk_eint_find_irq(hw->eint, desc->eint.eint_n); 933 } 934 935 static int mtk_gpio_set_config(struct gpio_chip *chip, unsigned int offset, 936 unsigned long config) 937 { 938 struct mtk_pinctrl *hw = gpiochip_get_data(chip); 939 const struct mtk_pin_desc *desc; 940 u32 debounce; 941 942 desc = (const struct mtk_pin_desc *)&hw->soc->pins[offset]; 943 944 if (!hw->eint || 945 pinconf_to_config_param(config) != PIN_CONFIG_INPUT_DEBOUNCE || 946 desc->eint.eint_n == EINT_NA) 947 return -ENOTSUPP; 948 949 debounce = pinconf_to_config_argument(config); 950 951 return mtk_eint_set_debounce(hw->eint, desc->eint.eint_n, debounce); 952 } 953 954 static int mtk_build_gpiochip(struct mtk_pinctrl *hw) 955 { 956 struct gpio_chip *chip = &hw->chip; 957 int ret; 958 959 chip->label = PINCTRL_PINCTRL_DEV; 960 chip->parent = hw->dev; 961 chip->request = gpiochip_generic_request; 962 chip->free = gpiochip_generic_free; 963 chip->get_direction = mtk_gpio_get_direction; 964 chip->direction_input = mtk_gpio_direction_input; 965 chip->direction_output = mtk_gpio_direction_output; 966 chip->get = mtk_gpio_get; 967 chip->set = mtk_gpio_set; 968 chip->to_irq = mtk_gpio_to_irq; 969 chip->set_config = mtk_gpio_set_config; 970 chip->base = -1; 971 chip->ngpio = hw->soc->npins; 972 973 ret = gpiochip_add_data(chip, hw); 974 if (ret < 0) 975 return ret; 976 977 return 0; 978 } 979 980 static int mtk_pctrl_build_state(struct platform_device *pdev) 981 { 982 struct mtk_pinctrl *hw = platform_get_drvdata(pdev); 983 int i; 984 985 /* Allocate groups */ 986 hw->groups = devm_kmalloc_array(&pdev->dev, hw->soc->ngrps, 987 sizeof(*hw->groups), GFP_KERNEL); 988 if (!hw->groups) 989 return -ENOMEM; 990 991 /* We assume that one pin is one group, use pin name as group name. */ 992 hw->grp_names = devm_kmalloc_array(&pdev->dev, hw->soc->ngrps, 993 sizeof(*hw->grp_names), GFP_KERNEL); 994 if (!hw->grp_names) 995 return -ENOMEM; 996 997 for (i = 0; i < hw->soc->npins; i++) { 998 const struct mtk_pin_desc *pin = hw->soc->pins + i; 999 struct mtk_pinctrl_group *group = hw->groups + i; 1000 1001 group->name = pin->name; 1002 group->pin = pin->number; 1003 1004 hw->grp_names[i] = pin->name; 1005 } 1006 1007 return 0; 1008 } 1009 1010 int mtk_paris_pinctrl_probe(struct platform_device *pdev) 1011 { 1012 struct device *dev = &pdev->dev; 1013 struct pinctrl_pin_desc *pins; 1014 struct mtk_pinctrl *hw; 1015 int err, i; 1016 1017 hw = devm_kzalloc(&pdev->dev, sizeof(*hw), GFP_KERNEL); 1018 if (!hw) 1019 return -ENOMEM; 1020 1021 platform_set_drvdata(pdev, hw); 1022 1023 hw->soc = device_get_match_data(dev); 1024 if (!hw->soc) 1025 return -ENOENT; 1026 1027 hw->dev = &pdev->dev; 1028 1029 if (!hw->soc->nbase_names) 1030 return dev_err_probe(dev, -EINVAL, 1031 "SoC should be assigned at least one register base\n"); 1032 1033 hw->base = devm_kmalloc_array(&pdev->dev, hw->soc->nbase_names, 1034 sizeof(*hw->base), GFP_KERNEL); 1035 if (!hw->base) 1036 return -ENOMEM; 1037 1038 for (i = 0; i < hw->soc->nbase_names; i++) { 1039 hw->base[i] = devm_platform_ioremap_resource_byname(pdev, 1040 hw->soc->base_names[i]); 1041 if (IS_ERR(hw->base[i])) 1042 return PTR_ERR(hw->base[i]); 1043 } 1044 1045 hw->nbase = hw->soc->nbase_names; 1046 1047 hw->rsel_si_unit = of_property_read_bool(hw->dev->of_node, 1048 "mediatek,rsel-resistance-in-si-unit"); 1049 1050 spin_lock_init(&hw->lock); 1051 1052 err = mtk_pctrl_build_state(pdev); 1053 if (err) 1054 return dev_err_probe(dev, err, "build state failed\n"); 1055 1056 /* Copy from internal struct mtk_pin_desc to register to the core */ 1057 pins = devm_kmalloc_array(&pdev->dev, hw->soc->npins, sizeof(*pins), 1058 GFP_KERNEL); 1059 if (!pins) 1060 return -ENOMEM; 1061 1062 for (i = 0; i < hw->soc->npins; i++) { 1063 pins[i].number = hw->soc->pins[i].number; 1064 pins[i].name = hw->soc->pins[i].name; 1065 } 1066 1067 /* Setup pins descriptions per SoC types */ 1068 mtk_desc.pins = (const struct pinctrl_pin_desc *)pins; 1069 mtk_desc.npins = hw->soc->npins; 1070 mtk_desc.num_custom_params = ARRAY_SIZE(mtk_custom_bindings); 1071 mtk_desc.custom_params = mtk_custom_bindings; 1072 #ifdef CONFIG_DEBUG_FS 1073 mtk_desc.custom_conf_items = mtk_conf_items; 1074 #endif 1075 1076 err = devm_pinctrl_register_and_init(&pdev->dev, &mtk_desc, hw, 1077 &hw->pctrl); 1078 if (err) 1079 return err; 1080 1081 err = pinctrl_enable(hw->pctrl); 1082 if (err) 1083 return err; 1084 1085 err = mtk_build_eint(hw, pdev); 1086 if (err) 1087 dev_warn(&pdev->dev, 1088 "Failed to add EINT, but pinctrl still can work\n"); 1089 1090 /* Build gpiochip should be after pinctrl_enable is done */ 1091 err = mtk_build_gpiochip(hw); 1092 if (err) 1093 return dev_err_probe(dev, err, "Failed to add gpio_chip\n"); 1094 1095 platform_set_drvdata(pdev, hw); 1096 1097 return 0; 1098 } 1099 EXPORT_SYMBOL_GPL(mtk_paris_pinctrl_probe); 1100 1101 static int mtk_paris_pinctrl_suspend(struct device *device) 1102 { 1103 struct mtk_pinctrl *pctl = dev_get_drvdata(device); 1104 1105 return mtk_eint_do_suspend(pctl->eint); 1106 } 1107 1108 static int mtk_paris_pinctrl_resume(struct device *device) 1109 { 1110 struct mtk_pinctrl *pctl = dev_get_drvdata(device); 1111 1112 return mtk_eint_do_resume(pctl->eint); 1113 } 1114 1115 EXPORT_GPL_DEV_SLEEP_PM_OPS(mtk_paris_pinctrl_pm_ops) = { 1116 NOIRQ_SYSTEM_SLEEP_PM_OPS(mtk_paris_pinctrl_suspend, mtk_paris_pinctrl_resume) 1117 }; 1118 1119 MODULE_LICENSE("GPL v2"); 1120 MODULE_DESCRIPTION("MediaTek Pinctrl Common Driver V2 Paris"); 1121