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 case PIN_CONFIG_OUTPUT_ENABLE: 169 err = mtk_hw_get_value(hw, desc, PINCTRL_PIN_REG_DIR, &ret); 170 if (err) 171 break; 172 /* CONFIG Current direction return value 173 * ------------- ----------------- ---------------------- 174 * OUTPUT_ENABLE output 1 (= HW value) 175 * input 0 (= HW value) 176 * INPUT_ENABLE output 0 (= reverse HW value) 177 * input 1 (= reverse HW value) 178 */ 179 if (param == PIN_CONFIG_INPUT_ENABLE) 180 ret = !ret; 181 182 break; 183 case PIN_CONFIG_INPUT_SCHMITT_ENABLE: 184 err = mtk_hw_get_value(hw, desc, PINCTRL_PIN_REG_DIR, &ret); 185 if (err) 186 break; 187 /* return error when in output mode 188 * because schmitt trigger only work in input mode 189 */ 190 if (ret) { 191 err = -EINVAL; 192 break; 193 } 194 195 err = mtk_hw_get_value(hw, desc, PINCTRL_PIN_REG_SMT, &ret); 196 break; 197 case PIN_CONFIG_DRIVE_STRENGTH: 198 if (!hw->soc->drive_get) 199 break; 200 201 if (hw->soc->adv_drive_get) { 202 err = hw->soc->adv_drive_get(hw, desc, &ret); 203 if (!err) { 204 err = mtk_drv_adv_to_uA(ret); 205 if (err > 0) { 206 /* PIN_CONFIG_DRIVE_STRENGTH_UA used */ 207 err = -EINVAL; 208 break; 209 } 210 } 211 } 212 213 err = hw->soc->drive_get(hw, desc, &ret); 214 break; 215 case PIN_CONFIG_DRIVE_STRENGTH_UA: 216 if (!hw->soc->adv_drive_get) 217 break; 218 219 err = hw->soc->adv_drive_get(hw, desc, &ret); 220 if (err) 221 break; 222 err = mtk_drv_adv_to_uA(ret); 223 if (err < 0) 224 break; 225 226 ret = err; 227 err = 0; 228 break; 229 case MTK_PIN_CONFIG_TDSEL: 230 case MTK_PIN_CONFIG_RDSEL: 231 reg = (param == MTK_PIN_CONFIG_TDSEL) ? 232 PINCTRL_PIN_REG_TDSEL : PINCTRL_PIN_REG_RDSEL; 233 err = mtk_hw_get_value(hw, desc, reg, &ret); 234 break; 235 case MTK_PIN_CONFIG_PU_ADV: 236 case MTK_PIN_CONFIG_PD_ADV: 237 if (!hw->soc->adv_pull_get) 238 break; 239 pullup = param == MTK_PIN_CONFIG_PU_ADV; 240 err = hw->soc->adv_pull_get(hw, desc, pullup, &ret); 241 break; 242 case MTK_PIN_CONFIG_DRV_ADV: 243 if (!hw->soc->adv_drive_get) 244 break; 245 err = hw->soc->adv_drive_get(hw, desc, &ret); 246 break; 247 } 248 249 if (!err) 250 *config = pinconf_to_config_packed(param, ret); 251 252 return err; 253 } 254 255 static int mtk_pinconf_set(struct pinctrl_dev *pctldev, unsigned int pin, 256 enum pin_config_param param, u32 arg) 257 { 258 struct mtk_pinctrl *hw = pinctrl_dev_get_drvdata(pctldev); 259 const struct mtk_pin_desc *desc; 260 int err = -ENOTSUPP; 261 u32 reg; 262 263 if (pin >= hw->soc->npins) 264 return -EINVAL; 265 266 desc = (const struct mtk_pin_desc *)&hw->soc->pins[pin]; 267 268 switch ((u32)param) { 269 case PIN_CONFIG_BIAS_DISABLE: 270 if (!hw->soc->bias_set_combo) 271 break; 272 err = hw->soc->bias_set_combo(hw, desc, 0, MTK_DISABLE); 273 break; 274 case PIN_CONFIG_BIAS_PULL_UP: 275 if (!hw->soc->bias_set_combo) 276 break; 277 err = hw->soc->bias_set_combo(hw, desc, 1, arg); 278 break; 279 case PIN_CONFIG_BIAS_PULL_DOWN: 280 if (!hw->soc->bias_set_combo) 281 break; 282 err = hw->soc->bias_set_combo(hw, desc, 0, arg); 283 break; 284 case PIN_CONFIG_OUTPUT_ENABLE: 285 err = mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_SMT, 286 MTK_DISABLE); 287 /* Keep set direction to consider the case that a GPIO pin 288 * does not have SMT control 289 */ 290 if (err != -ENOTSUPP) 291 break; 292 293 err = mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_DIR, 294 MTK_OUTPUT); 295 break; 296 case PIN_CONFIG_INPUT_ENABLE: 297 /* regard all non-zero value as enable */ 298 err = mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_IES, !!arg); 299 if (err) 300 break; 301 302 err = mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_DIR, 303 MTK_INPUT); 304 break; 305 case PIN_CONFIG_SLEW_RATE: 306 /* regard all non-zero value as enable */ 307 err = mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_SR, !!arg); 308 break; 309 case PIN_CONFIG_OUTPUT: 310 err = mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_DO, 311 arg); 312 if (err) 313 break; 314 315 err = mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_DIR, 316 MTK_OUTPUT); 317 break; 318 case PIN_CONFIG_INPUT_SCHMITT: 319 case PIN_CONFIG_INPUT_SCHMITT_ENABLE: 320 /* arg = 1: Input mode & SMT enable ; 321 * arg = 0: Output mode & SMT disable 322 */ 323 err = mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_DIR, !arg); 324 if (err) 325 break; 326 327 err = mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_SMT, !!arg); 328 break; 329 case PIN_CONFIG_DRIVE_STRENGTH: 330 if (!hw->soc->drive_set) 331 break; 332 err = hw->soc->drive_set(hw, desc, arg); 333 break; 334 case PIN_CONFIG_DRIVE_STRENGTH_UA: 335 if (!hw->soc->adv_drive_set) 336 break; 337 338 err = mtk_drv_uA_to_adv(arg); 339 if (err < 0) 340 break; 341 err = hw->soc->adv_drive_set(hw, desc, err); 342 break; 343 case MTK_PIN_CONFIG_TDSEL: 344 case MTK_PIN_CONFIG_RDSEL: 345 reg = (param == MTK_PIN_CONFIG_TDSEL) ? 346 PINCTRL_PIN_REG_TDSEL : PINCTRL_PIN_REG_RDSEL; 347 err = mtk_hw_set_value(hw, desc, reg, arg); 348 break; 349 case MTK_PIN_CONFIG_PU_ADV: 350 case MTK_PIN_CONFIG_PD_ADV: 351 if (!hw->soc->adv_pull_set) 352 break; 353 err = hw->soc->adv_pull_set(hw, desc, 354 (param == MTK_PIN_CONFIG_PU_ADV), 355 arg); 356 break; 357 case MTK_PIN_CONFIG_DRV_ADV: 358 if (!hw->soc->adv_drive_set) 359 break; 360 err = hw->soc->adv_drive_set(hw, desc, arg); 361 break; 362 } 363 364 return err; 365 } 366 367 static struct mtk_pinctrl_group * 368 mtk_pctrl_find_group_by_pin(struct mtk_pinctrl *hw, u32 pin) 369 { 370 int i; 371 372 for (i = 0; i < hw->soc->ngrps; i++) { 373 struct mtk_pinctrl_group *grp = hw->groups + i; 374 375 if (grp->pin == pin) 376 return grp; 377 } 378 379 return NULL; 380 } 381 382 static const struct mtk_func_desc * 383 mtk_pctrl_find_function_by_pin(struct mtk_pinctrl *hw, u32 pin_num, u32 fnum) 384 { 385 const struct mtk_pin_desc *pin = hw->soc->pins + pin_num; 386 const struct mtk_func_desc *func = pin->funcs; 387 388 while (func && func->name) { 389 if (func->muxval == fnum) 390 return func; 391 func++; 392 } 393 394 return NULL; 395 } 396 397 static bool mtk_pctrl_is_function_valid(struct mtk_pinctrl *hw, u32 pin_num, 398 u32 fnum) 399 { 400 int i; 401 402 for (i = 0; i < hw->soc->npins; i++) { 403 const struct mtk_pin_desc *pin = hw->soc->pins + i; 404 405 if (pin->number == pin_num) { 406 const struct mtk_func_desc *func = pin->funcs; 407 408 while (func && func->name) { 409 if (func->muxval == fnum) 410 return true; 411 func++; 412 } 413 414 break; 415 } 416 } 417 418 return false; 419 } 420 421 static int mtk_pctrl_dt_node_to_map_func(struct mtk_pinctrl *pctl, 422 u32 pin, u32 fnum, 423 struct mtk_pinctrl_group *grp, 424 struct pinctrl_map **map, 425 unsigned *reserved_maps, 426 unsigned *num_maps) 427 { 428 bool ret; 429 430 if (*num_maps == *reserved_maps) 431 return -ENOSPC; 432 433 (*map)[*num_maps].type = PIN_MAP_TYPE_MUX_GROUP; 434 (*map)[*num_maps].data.mux.group = grp->name; 435 436 ret = mtk_pctrl_is_function_valid(pctl, pin, fnum); 437 if (!ret) { 438 dev_err(pctl->dev, "invalid function %d on pin %d .\n", 439 fnum, pin); 440 return -EINVAL; 441 } 442 443 (*map)[*num_maps].data.mux.function = mtk_gpio_functions[fnum]; 444 (*num_maps)++; 445 446 return 0; 447 } 448 449 static int mtk_pctrl_dt_subnode_to_map(struct pinctrl_dev *pctldev, 450 struct device_node *node, 451 struct pinctrl_map **map, 452 unsigned *reserved_maps, 453 unsigned *num_maps) 454 { 455 struct mtk_pinctrl *hw = pinctrl_dev_get_drvdata(pctldev); 456 int num_pins, num_funcs, maps_per_pin, i, err; 457 struct mtk_pinctrl_group *grp; 458 unsigned int num_configs; 459 bool has_config = false; 460 unsigned long *configs; 461 u32 pinfunc, pin, func; 462 struct property *pins; 463 unsigned reserve = 0; 464 465 pins = of_find_property(node, "pinmux", NULL); 466 if (!pins) { 467 dev_err(hw->dev, "missing pins property in node %pOFn .\n", 468 node); 469 return -EINVAL; 470 } 471 472 err = pinconf_generic_parse_dt_config(node, pctldev, &configs, 473 &num_configs); 474 if (err) 475 return err; 476 477 if (num_configs) 478 has_config = true; 479 480 num_pins = pins->length / sizeof(u32); 481 num_funcs = num_pins; 482 maps_per_pin = 0; 483 if (num_funcs) 484 maps_per_pin++; 485 if (has_config && num_pins >= 1) 486 maps_per_pin++; 487 488 if (!num_pins || !maps_per_pin) { 489 err = -EINVAL; 490 goto exit; 491 } 492 493 reserve = num_pins * maps_per_pin; 494 495 err = pinctrl_utils_reserve_map(pctldev, map, reserved_maps, num_maps, 496 reserve); 497 if (err < 0) 498 goto exit; 499 500 for (i = 0; i < num_pins; i++) { 501 err = of_property_read_u32_index(node, "pinmux", i, &pinfunc); 502 if (err) 503 goto exit; 504 505 pin = MTK_GET_PIN_NO(pinfunc); 506 func = MTK_GET_PIN_FUNC(pinfunc); 507 508 if (pin >= hw->soc->npins || 509 func >= ARRAY_SIZE(mtk_gpio_functions)) { 510 dev_err(hw->dev, "invalid pins value.\n"); 511 err = -EINVAL; 512 goto exit; 513 } 514 515 grp = mtk_pctrl_find_group_by_pin(hw, pin); 516 if (!grp) { 517 dev_err(hw->dev, "unable to match pin %d to group\n", 518 pin); 519 err = -EINVAL; 520 goto exit; 521 } 522 523 err = mtk_pctrl_dt_node_to_map_func(hw, pin, func, grp, map, 524 reserved_maps, num_maps); 525 if (err < 0) 526 goto exit; 527 528 if (has_config) { 529 err = pinctrl_utils_add_map_configs(pctldev, map, 530 reserved_maps, 531 num_maps, 532 grp->name, 533 configs, 534 num_configs, 535 PIN_MAP_TYPE_CONFIGS_GROUP); 536 if (err < 0) 537 goto exit; 538 } 539 } 540 541 err = 0; 542 543 exit: 544 kfree(configs); 545 return err; 546 } 547 548 static int mtk_pctrl_dt_node_to_map(struct pinctrl_dev *pctldev, 549 struct device_node *np_config, 550 struct pinctrl_map **map, 551 unsigned *num_maps) 552 { 553 struct device_node *np; 554 unsigned reserved_maps; 555 int ret; 556 557 *map = NULL; 558 *num_maps = 0; 559 reserved_maps = 0; 560 561 for_each_child_of_node(np_config, np) { 562 ret = mtk_pctrl_dt_subnode_to_map(pctldev, np, map, 563 &reserved_maps, 564 num_maps); 565 if (ret < 0) { 566 pinctrl_utils_free_map(pctldev, *map, *num_maps); 567 of_node_put(np); 568 return ret; 569 } 570 } 571 572 return 0; 573 } 574 575 static int mtk_pctrl_get_groups_count(struct pinctrl_dev *pctldev) 576 { 577 struct mtk_pinctrl *hw = pinctrl_dev_get_drvdata(pctldev); 578 579 return hw->soc->ngrps; 580 } 581 582 static const char *mtk_pctrl_get_group_name(struct pinctrl_dev *pctldev, 583 unsigned group) 584 { 585 struct mtk_pinctrl *hw = pinctrl_dev_get_drvdata(pctldev); 586 587 return hw->groups[group].name; 588 } 589 590 static int mtk_pctrl_get_group_pins(struct pinctrl_dev *pctldev, 591 unsigned group, const unsigned **pins, 592 unsigned *num_pins) 593 { 594 struct mtk_pinctrl *hw = pinctrl_dev_get_drvdata(pctldev); 595 596 *pins = (unsigned *)&hw->groups[group].pin; 597 *num_pins = 1; 598 599 return 0; 600 } 601 602 static int mtk_hw_get_value_wrap(struct mtk_pinctrl *hw, unsigned int gpio, int field) 603 { 604 const struct mtk_pin_desc *desc; 605 int value, err; 606 607 if (gpio >= hw->soc->npins) 608 return -EINVAL; 609 610 desc = (const struct mtk_pin_desc *)&hw->soc->pins[gpio]; 611 612 err = mtk_hw_get_value(hw, desc, field, &value); 613 if (err) 614 return err; 615 616 return value; 617 } 618 619 #define mtk_pctrl_get_pinmux(hw, gpio) \ 620 mtk_hw_get_value_wrap(hw, gpio, PINCTRL_PIN_REG_MODE) 621 622 #define mtk_pctrl_get_direction(hw, gpio) \ 623 mtk_hw_get_value_wrap(hw, gpio, PINCTRL_PIN_REG_DIR) 624 625 #define mtk_pctrl_get_out(hw, gpio) \ 626 mtk_hw_get_value_wrap(hw, gpio, PINCTRL_PIN_REG_DO) 627 628 #define mtk_pctrl_get_in(hw, gpio) \ 629 mtk_hw_get_value_wrap(hw, gpio, PINCTRL_PIN_REG_DI) 630 631 #define mtk_pctrl_get_smt(hw, gpio) \ 632 mtk_hw_get_value_wrap(hw, gpio, PINCTRL_PIN_REG_SMT) 633 634 #define mtk_pctrl_get_ies(hw, gpio) \ 635 mtk_hw_get_value_wrap(hw, gpio, PINCTRL_PIN_REG_IES) 636 637 #define mtk_pctrl_get_driving(hw, gpio) \ 638 mtk_hw_get_value_wrap(hw, gpio, PINCTRL_PIN_REG_DRV) 639 640 ssize_t mtk_pctrl_show_one_pin(struct mtk_pinctrl *hw, 641 unsigned int gpio, char *buf, unsigned int buf_len) 642 { 643 int pinmux, pullup, pullen, len = 0, r1 = -1, r0 = -1, rsel = -1; 644 const struct mtk_pin_desc *desc; 645 u32 try_all_type = 0; 646 647 if (gpio >= hw->soc->npins) 648 return -EINVAL; 649 650 if (mtk_is_virt_gpio(hw, gpio)) 651 return -EINVAL; 652 653 desc = (const struct mtk_pin_desc *)&hw->soc->pins[gpio]; 654 pinmux = mtk_pctrl_get_pinmux(hw, gpio); 655 if (pinmux >= hw->soc->nfuncs) 656 pinmux -= hw->soc->nfuncs; 657 658 mtk_pinconf_bias_get_combo(hw, desc, &pullup, &pullen); 659 660 if (hw->soc->pull_type) 661 try_all_type = hw->soc->pull_type[desc->number]; 662 663 if (hw->rsel_si_unit && (try_all_type & MTK_PULL_RSEL_TYPE)) { 664 rsel = pullen; 665 pullen = 1; 666 } else { 667 /* Case for: R1R0 */ 668 if (pullen == MTK_PUPD_SET_R1R0_00) { 669 pullen = 0; 670 r1 = 0; 671 r0 = 0; 672 } else if (pullen == MTK_PUPD_SET_R1R0_01) { 673 pullen = 1; 674 r1 = 0; 675 r0 = 1; 676 } else if (pullen == MTK_PUPD_SET_R1R0_10) { 677 pullen = 1; 678 r1 = 1; 679 r0 = 0; 680 } else if (pullen == MTK_PUPD_SET_R1R0_11) { 681 pullen = 1; 682 r1 = 1; 683 r0 = 1; 684 } 685 686 /* Case for: RSEL */ 687 if (pullen >= MTK_PULL_SET_RSEL_000 && 688 pullen <= MTK_PULL_SET_RSEL_111) { 689 rsel = pullen - MTK_PULL_SET_RSEL_000; 690 pullen = 1; 691 } 692 } 693 len += scnprintf(buf + len, buf_len - len, 694 "%03d: %1d%1d%1d%1d%02d%1d%1d%1d%1d", 695 gpio, 696 pinmux, 697 mtk_pctrl_get_direction(hw, gpio), 698 mtk_pctrl_get_out(hw, gpio), 699 mtk_pctrl_get_in(hw, gpio), 700 mtk_pctrl_get_driving(hw, gpio), 701 mtk_pctrl_get_smt(hw, gpio), 702 mtk_pctrl_get_ies(hw, gpio), 703 pullen, 704 pullup); 705 706 if (r1 != -1) 707 len += scnprintf(buf + len, buf_len - len, " (%1d %1d)", r1, r0); 708 else if (rsel != -1) 709 len += scnprintf(buf + len, buf_len - len, " (%1d)", rsel); 710 711 return len; 712 } 713 EXPORT_SYMBOL_GPL(mtk_pctrl_show_one_pin); 714 715 #define PIN_DBG_BUF_SZ 96 716 static void mtk_pctrl_dbg_show(struct pinctrl_dev *pctldev, struct seq_file *s, 717 unsigned int gpio) 718 { 719 struct mtk_pinctrl *hw = pinctrl_dev_get_drvdata(pctldev); 720 char buf[PIN_DBG_BUF_SZ]; 721 722 (void)mtk_pctrl_show_one_pin(hw, gpio, buf, PIN_DBG_BUF_SZ); 723 724 seq_printf(s, "%s", buf); 725 } 726 727 static const struct pinctrl_ops mtk_pctlops = { 728 .dt_node_to_map = mtk_pctrl_dt_node_to_map, 729 .dt_free_map = pinctrl_utils_free_map, 730 .get_groups_count = mtk_pctrl_get_groups_count, 731 .get_group_name = mtk_pctrl_get_group_name, 732 .get_group_pins = mtk_pctrl_get_group_pins, 733 .pin_dbg_show = mtk_pctrl_dbg_show, 734 }; 735 736 static int mtk_pmx_get_funcs_cnt(struct pinctrl_dev *pctldev) 737 { 738 return ARRAY_SIZE(mtk_gpio_functions); 739 } 740 741 static const char *mtk_pmx_get_func_name(struct pinctrl_dev *pctldev, 742 unsigned selector) 743 { 744 return mtk_gpio_functions[selector]; 745 } 746 747 static int mtk_pmx_get_func_groups(struct pinctrl_dev *pctldev, 748 unsigned function, 749 const char * const **groups, 750 unsigned * const num_groups) 751 { 752 struct mtk_pinctrl *hw = pinctrl_dev_get_drvdata(pctldev); 753 754 *groups = hw->grp_names; 755 *num_groups = hw->soc->ngrps; 756 757 return 0; 758 } 759 760 static int mtk_pmx_set_mux(struct pinctrl_dev *pctldev, 761 unsigned function, 762 unsigned group) 763 { 764 struct mtk_pinctrl *hw = pinctrl_dev_get_drvdata(pctldev); 765 struct mtk_pinctrl_group *grp = hw->groups + group; 766 const struct mtk_func_desc *desc_func; 767 const struct mtk_pin_desc *desc; 768 bool ret; 769 770 ret = mtk_pctrl_is_function_valid(hw, grp->pin, function); 771 if (!ret) { 772 dev_err(hw->dev, "invalid function %d on group %d .\n", 773 function, group); 774 return -EINVAL; 775 } 776 777 desc_func = mtk_pctrl_find_function_by_pin(hw, grp->pin, function); 778 if (!desc_func) 779 return -EINVAL; 780 781 desc = (const struct mtk_pin_desc *)&hw->soc->pins[grp->pin]; 782 mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_MODE, desc_func->muxval); 783 784 return 0; 785 } 786 787 static const struct pinmux_ops mtk_pmxops = { 788 .get_functions_count = mtk_pmx_get_funcs_cnt, 789 .get_function_name = mtk_pmx_get_func_name, 790 .get_function_groups = mtk_pmx_get_func_groups, 791 .set_mux = mtk_pmx_set_mux, 792 .gpio_set_direction = mtk_pinmux_gpio_set_direction, 793 .gpio_request_enable = mtk_pinmux_gpio_request_enable, 794 }; 795 796 static int mtk_pconf_group_get(struct pinctrl_dev *pctldev, unsigned group, 797 unsigned long *config) 798 { 799 struct mtk_pinctrl *hw = pinctrl_dev_get_drvdata(pctldev); 800 struct mtk_pinctrl_group *grp = &hw->groups[group]; 801 802 /* One pin per group only */ 803 return mtk_pinconf_get(pctldev, grp->pin, config); 804 } 805 806 static int mtk_pconf_group_set(struct pinctrl_dev *pctldev, unsigned group, 807 unsigned long *configs, unsigned num_configs) 808 { 809 struct mtk_pinctrl *hw = pinctrl_dev_get_drvdata(pctldev); 810 struct mtk_pinctrl_group *grp = &hw->groups[group]; 811 bool drive_strength_uA_found = false; 812 bool adv_drve_strength_found = false; 813 int i, ret; 814 815 for (i = 0; i < num_configs; i++) { 816 ret = mtk_pinconf_set(pctldev, grp->pin, 817 pinconf_to_config_param(configs[i]), 818 pinconf_to_config_argument(configs[i])); 819 if (ret < 0) 820 return ret; 821 822 if (pinconf_to_config_param(configs[i]) == PIN_CONFIG_DRIVE_STRENGTH_UA) 823 drive_strength_uA_found = true; 824 if (pinconf_to_config_param(configs[i]) == MTK_PIN_CONFIG_DRV_ADV) 825 adv_drve_strength_found = true; 826 } 827 828 /* 829 * Disable advanced drive strength mode if drive-strength-microamp 830 * is not set. However, mediatek,drive-strength-adv takes precedence 831 * as its value can explicitly request the mode be enabled or not. 832 */ 833 if (hw->soc->adv_drive_set && !drive_strength_uA_found && 834 !adv_drve_strength_found) 835 hw->soc->adv_drive_set(hw, &hw->soc->pins[grp->pin], 0); 836 837 return 0; 838 } 839 840 static const struct pinconf_ops mtk_confops = { 841 .pin_config_get = mtk_pinconf_get, 842 .pin_config_group_get = mtk_pconf_group_get, 843 .pin_config_group_set = mtk_pconf_group_set, 844 .is_generic = true, 845 }; 846 847 static struct pinctrl_desc mtk_desc = { 848 .name = PINCTRL_PINCTRL_DEV, 849 .pctlops = &mtk_pctlops, 850 .pmxops = &mtk_pmxops, 851 .confops = &mtk_confops, 852 .owner = THIS_MODULE, 853 }; 854 855 static int mtk_gpio_get_direction(struct gpio_chip *chip, unsigned int gpio) 856 { 857 struct mtk_pinctrl *hw = gpiochip_get_data(chip); 858 const struct mtk_pin_desc *desc; 859 int value, err; 860 861 if (gpio >= hw->soc->npins) 862 return -EINVAL; 863 864 /* 865 * "Virtual" GPIOs are always and only used for interrupts 866 * Since they are only used for interrupts, they are always inputs 867 */ 868 if (mtk_is_virt_gpio(hw, gpio)) 869 return 1; 870 871 desc = (const struct mtk_pin_desc *)&hw->soc->pins[gpio]; 872 873 err = mtk_hw_get_value(hw, desc, PINCTRL_PIN_REG_DIR, &value); 874 if (err) 875 return err; 876 877 if (value) 878 return GPIO_LINE_DIRECTION_OUT; 879 880 return GPIO_LINE_DIRECTION_IN; 881 } 882 883 static int mtk_gpio_get(struct gpio_chip *chip, unsigned int gpio) 884 { 885 struct mtk_pinctrl *hw = gpiochip_get_data(chip); 886 const struct mtk_pin_desc *desc; 887 int value, err; 888 889 if (gpio >= hw->soc->npins) 890 return -EINVAL; 891 892 desc = (const struct mtk_pin_desc *)&hw->soc->pins[gpio]; 893 894 err = mtk_hw_get_value(hw, desc, PINCTRL_PIN_REG_DI, &value); 895 if (err) 896 return err; 897 898 return !!value; 899 } 900 901 static void mtk_gpio_set(struct gpio_chip *chip, unsigned int gpio, int value) 902 { 903 struct mtk_pinctrl *hw = gpiochip_get_data(chip); 904 const struct mtk_pin_desc *desc; 905 906 if (gpio >= hw->soc->npins) 907 return; 908 909 desc = (const struct mtk_pin_desc *)&hw->soc->pins[gpio]; 910 911 mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_DO, !!value); 912 } 913 914 static int mtk_gpio_direction_input(struct gpio_chip *chip, unsigned int gpio) 915 { 916 struct mtk_pinctrl *hw = gpiochip_get_data(chip); 917 918 if (gpio >= hw->soc->npins) 919 return -EINVAL; 920 921 return pinctrl_gpio_direction_input(chip->base + gpio); 922 } 923 924 static int mtk_gpio_direction_output(struct gpio_chip *chip, unsigned int gpio, 925 int value) 926 { 927 struct mtk_pinctrl *hw = gpiochip_get_data(chip); 928 929 if (gpio >= hw->soc->npins) 930 return -EINVAL; 931 932 mtk_gpio_set(chip, gpio, value); 933 934 return pinctrl_gpio_direction_output(chip->base + gpio); 935 } 936 937 static int mtk_gpio_to_irq(struct gpio_chip *chip, unsigned int offset) 938 { 939 struct mtk_pinctrl *hw = gpiochip_get_data(chip); 940 const struct mtk_pin_desc *desc; 941 942 if (!hw->eint) 943 return -ENOTSUPP; 944 945 desc = (const struct mtk_pin_desc *)&hw->soc->pins[offset]; 946 947 if (desc->eint.eint_n == EINT_NA) 948 return -ENOTSUPP; 949 950 return mtk_eint_find_irq(hw->eint, desc->eint.eint_n); 951 } 952 953 static int mtk_gpio_set_config(struct gpio_chip *chip, unsigned int offset, 954 unsigned long config) 955 { 956 struct mtk_pinctrl *hw = gpiochip_get_data(chip); 957 const struct mtk_pin_desc *desc; 958 u32 debounce; 959 960 desc = (const struct mtk_pin_desc *)&hw->soc->pins[offset]; 961 962 if (!hw->eint || 963 pinconf_to_config_param(config) != PIN_CONFIG_INPUT_DEBOUNCE || 964 desc->eint.eint_n == EINT_NA) 965 return -ENOTSUPP; 966 967 debounce = pinconf_to_config_argument(config); 968 969 return mtk_eint_set_debounce(hw->eint, desc->eint.eint_n, debounce); 970 } 971 972 static int mtk_build_gpiochip(struct mtk_pinctrl *hw) 973 { 974 struct gpio_chip *chip = &hw->chip; 975 int ret; 976 977 chip->label = PINCTRL_PINCTRL_DEV; 978 chip->parent = hw->dev; 979 chip->request = gpiochip_generic_request; 980 chip->free = gpiochip_generic_free; 981 chip->get_direction = mtk_gpio_get_direction; 982 chip->direction_input = mtk_gpio_direction_input; 983 chip->direction_output = mtk_gpio_direction_output; 984 chip->get = mtk_gpio_get; 985 chip->set = mtk_gpio_set; 986 chip->to_irq = mtk_gpio_to_irq; 987 chip->set_config = mtk_gpio_set_config; 988 chip->base = -1; 989 chip->ngpio = hw->soc->npins; 990 chip->of_gpio_n_cells = 2; 991 992 ret = gpiochip_add_data(chip, hw); 993 if (ret < 0) 994 return ret; 995 996 return 0; 997 } 998 999 static int mtk_pctrl_build_state(struct platform_device *pdev) 1000 { 1001 struct mtk_pinctrl *hw = platform_get_drvdata(pdev); 1002 int i; 1003 1004 /* Allocate groups */ 1005 hw->groups = devm_kmalloc_array(&pdev->dev, hw->soc->ngrps, 1006 sizeof(*hw->groups), GFP_KERNEL); 1007 if (!hw->groups) 1008 return -ENOMEM; 1009 1010 /* We assume that one pin is one group, use pin name as group name. */ 1011 hw->grp_names = devm_kmalloc_array(&pdev->dev, hw->soc->ngrps, 1012 sizeof(*hw->grp_names), GFP_KERNEL); 1013 if (!hw->grp_names) 1014 return -ENOMEM; 1015 1016 for (i = 0; i < hw->soc->npins; i++) { 1017 const struct mtk_pin_desc *pin = hw->soc->pins + i; 1018 struct mtk_pinctrl_group *group = hw->groups + i; 1019 1020 group->name = pin->name; 1021 group->pin = pin->number; 1022 1023 hw->grp_names[i] = pin->name; 1024 } 1025 1026 return 0; 1027 } 1028 1029 int mtk_paris_pinctrl_probe(struct platform_device *pdev) 1030 { 1031 struct device *dev = &pdev->dev; 1032 struct pinctrl_pin_desc *pins; 1033 struct mtk_pinctrl *hw; 1034 int err, i; 1035 1036 hw = devm_kzalloc(&pdev->dev, sizeof(*hw), GFP_KERNEL); 1037 if (!hw) 1038 return -ENOMEM; 1039 1040 platform_set_drvdata(pdev, hw); 1041 1042 hw->soc = device_get_match_data(dev); 1043 if (!hw->soc) 1044 return -ENOENT; 1045 1046 hw->dev = &pdev->dev; 1047 1048 if (!hw->soc->nbase_names) 1049 return dev_err_probe(dev, -EINVAL, 1050 "SoC should be assigned at least one register base\n"); 1051 1052 hw->base = devm_kmalloc_array(&pdev->dev, hw->soc->nbase_names, 1053 sizeof(*hw->base), GFP_KERNEL); 1054 if (!hw->base) 1055 return -ENOMEM; 1056 1057 for (i = 0; i < hw->soc->nbase_names; i++) { 1058 hw->base[i] = devm_platform_ioremap_resource_byname(pdev, 1059 hw->soc->base_names[i]); 1060 if (IS_ERR(hw->base[i])) 1061 return PTR_ERR(hw->base[i]); 1062 } 1063 1064 hw->nbase = hw->soc->nbase_names; 1065 1066 if (of_find_property(hw->dev->of_node, 1067 "mediatek,rsel-resistance-in-si-unit", NULL)) 1068 hw->rsel_si_unit = true; 1069 else 1070 hw->rsel_si_unit = false; 1071 1072 spin_lock_init(&hw->lock); 1073 1074 err = mtk_pctrl_build_state(pdev); 1075 if (err) 1076 return dev_err_probe(dev, err, "build state failed\n"); 1077 1078 /* Copy from internal struct mtk_pin_desc to register to the core */ 1079 pins = devm_kmalloc_array(&pdev->dev, hw->soc->npins, sizeof(*pins), 1080 GFP_KERNEL); 1081 if (!pins) 1082 return -ENOMEM; 1083 1084 for (i = 0; i < hw->soc->npins; i++) { 1085 pins[i].number = hw->soc->pins[i].number; 1086 pins[i].name = hw->soc->pins[i].name; 1087 } 1088 1089 /* Setup pins descriptions per SoC types */ 1090 mtk_desc.pins = (const struct pinctrl_pin_desc *)pins; 1091 mtk_desc.npins = hw->soc->npins; 1092 mtk_desc.num_custom_params = ARRAY_SIZE(mtk_custom_bindings); 1093 mtk_desc.custom_params = mtk_custom_bindings; 1094 #ifdef CONFIG_DEBUG_FS 1095 mtk_desc.custom_conf_items = mtk_conf_items; 1096 #endif 1097 1098 err = devm_pinctrl_register_and_init(&pdev->dev, &mtk_desc, hw, 1099 &hw->pctrl); 1100 if (err) 1101 return err; 1102 1103 err = pinctrl_enable(hw->pctrl); 1104 if (err) 1105 return err; 1106 1107 err = mtk_build_eint(hw, pdev); 1108 if (err) 1109 dev_warn(&pdev->dev, 1110 "Failed to add EINT, but pinctrl still can work\n"); 1111 1112 /* Build gpiochip should be after pinctrl_enable is done */ 1113 err = mtk_build_gpiochip(hw); 1114 if (err) 1115 return dev_err_probe(dev, err, "Failed to add gpio_chip\n"); 1116 1117 platform_set_drvdata(pdev, hw); 1118 1119 return 0; 1120 } 1121 EXPORT_SYMBOL_GPL(mtk_paris_pinctrl_probe); 1122 1123 static int mtk_paris_pinctrl_suspend(struct device *device) 1124 { 1125 struct mtk_pinctrl *pctl = dev_get_drvdata(device); 1126 1127 return mtk_eint_do_suspend(pctl->eint); 1128 } 1129 1130 static int mtk_paris_pinctrl_resume(struct device *device) 1131 { 1132 struct mtk_pinctrl *pctl = dev_get_drvdata(device); 1133 1134 return mtk_eint_do_resume(pctl->eint); 1135 } 1136 1137 const struct dev_pm_ops mtk_paris_pinctrl_pm_ops = { 1138 .suspend_noirq = mtk_paris_pinctrl_suspend, 1139 .resume_noirq = mtk_paris_pinctrl_resume, 1140 }; 1141 1142 MODULE_LICENSE("GPL v2"); 1143 MODULE_DESCRIPTION("MediaTek Pinctrl Common Driver V2 Paris"); 1144