1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * mt65xx pinctrl driver based on Allwinner A1X pinctrl driver. 4 * Copyright (c) 2014 MediaTek Inc. 5 * Author: Hongzhou.Yang <hongzhou.yang@mediatek.com> 6 */ 7 8 #include <linux/io.h> 9 #include <linux/gpio/driver.h> 10 #include <linux/of.h> 11 #include <linux/of_address.h> 12 #include <linux/of_device.h> 13 #include <linux/of_irq.h> 14 #include <linux/pinctrl/consumer.h> 15 #include <linux/pinctrl/machine.h> 16 #include <linux/pinctrl/pinconf.h> 17 #include <linux/pinctrl/pinconf-generic.h> 18 #include <linux/pinctrl/pinctrl.h> 19 #include <linux/pinctrl/pinmux.h> 20 #include <linux/platform_device.h> 21 #include <linux/slab.h> 22 #include <linux/bitops.h> 23 #include <linux/regmap.h> 24 #include <linux/mfd/syscon.h> 25 #include <linux/delay.h> 26 #include <linux/interrupt.h> 27 #include <linux/pm.h> 28 #include <dt-bindings/pinctrl/mt65xx.h> 29 30 #include "../core.h" 31 #include "../pinconf.h" 32 #include "../pinctrl-utils.h" 33 #include "mtk-eint.h" 34 #include "pinctrl-mtk-common.h" 35 36 #define MAX_GPIO_MODE_PER_REG 5 37 #define GPIO_MODE_BITS 3 38 #define GPIO_MODE_PREFIX "GPIO" 39 40 static const char * const mtk_gpio_functions[] = { 41 "func0", "func1", "func2", "func3", 42 "func4", "func5", "func6", "func7", 43 "func8", "func9", "func10", "func11", 44 "func12", "func13", "func14", "func15", 45 }; 46 47 /* 48 * There are two base address for pull related configuration 49 * in mt8135, and different GPIO pins use different base address. 50 * When pin number greater than type1_start and less than type1_end, 51 * should use the second base address. 52 */ 53 static struct regmap *mtk_get_regmap(struct mtk_pinctrl *pctl, 54 unsigned long pin) 55 { 56 if (pin >= pctl->devdata->type1_start && pin < pctl->devdata->type1_end) 57 return pctl->regmap2; 58 return pctl->regmap1; 59 } 60 61 static unsigned int mtk_get_port(struct mtk_pinctrl *pctl, unsigned long pin) 62 { 63 /* Different SoC has different mask and port shift. */ 64 return ((pin >> 4) & pctl->devdata->port_mask) 65 << pctl->devdata->port_shf; 66 } 67 68 static int mtk_pmx_gpio_set_direction(struct pinctrl_dev *pctldev, 69 struct pinctrl_gpio_range *range, unsigned offset, 70 bool input) 71 { 72 unsigned int reg_addr; 73 unsigned int bit; 74 struct mtk_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev); 75 76 reg_addr = mtk_get_port(pctl, offset) + pctl->devdata->dir_offset; 77 bit = BIT(offset & 0xf); 78 79 if (pctl->devdata->spec_dir_set) 80 pctl->devdata->spec_dir_set(®_addr, offset); 81 82 if (input) 83 /* Different SoC has different alignment offset. */ 84 reg_addr = CLR_ADDR(reg_addr, pctl); 85 else 86 reg_addr = SET_ADDR(reg_addr, pctl); 87 88 regmap_write(mtk_get_regmap(pctl, offset), reg_addr, bit); 89 return 0; 90 } 91 92 static void mtk_gpio_set(struct gpio_chip *chip, unsigned offset, int value) 93 { 94 unsigned int reg_addr; 95 unsigned int bit; 96 struct mtk_pinctrl *pctl = gpiochip_get_data(chip); 97 98 reg_addr = mtk_get_port(pctl, offset) + pctl->devdata->dout_offset; 99 bit = BIT(offset & 0xf); 100 101 if (value) 102 reg_addr = SET_ADDR(reg_addr, pctl); 103 else 104 reg_addr = CLR_ADDR(reg_addr, pctl); 105 106 regmap_write(mtk_get_regmap(pctl, offset), reg_addr, bit); 107 } 108 109 static int mtk_pconf_set_ies_smt(struct mtk_pinctrl *pctl, unsigned pin, 110 int value, enum pin_config_param arg) 111 { 112 unsigned int reg_addr, offset; 113 unsigned int bit; 114 115 /** 116 * Due to some soc are not support ies/smt config, add this special 117 * control to handle it. 118 */ 119 if (!pctl->devdata->spec_ies_smt_set && 120 pctl->devdata->ies_offset == MTK_PINCTRL_NOT_SUPPORT && 121 arg == PIN_CONFIG_INPUT_ENABLE) 122 return -EINVAL; 123 124 if (!pctl->devdata->spec_ies_smt_set && 125 pctl->devdata->smt_offset == MTK_PINCTRL_NOT_SUPPORT && 126 arg == PIN_CONFIG_INPUT_SCHMITT_ENABLE) 127 return -EINVAL; 128 129 /* 130 * Due to some pins are irregular, their input enable and smt 131 * control register are discontinuous, so we need this special handle. 132 */ 133 if (pctl->devdata->spec_ies_smt_set) { 134 return pctl->devdata->spec_ies_smt_set(mtk_get_regmap(pctl, pin), 135 pin, pctl->devdata->port_align, value, arg); 136 } 137 138 bit = BIT(pin & 0xf); 139 140 if (arg == PIN_CONFIG_INPUT_ENABLE) 141 offset = pctl->devdata->ies_offset; 142 else 143 offset = pctl->devdata->smt_offset; 144 145 if (value) 146 reg_addr = SET_ADDR(mtk_get_port(pctl, pin) + offset, pctl); 147 else 148 reg_addr = CLR_ADDR(mtk_get_port(pctl, pin) + offset, pctl); 149 150 regmap_write(mtk_get_regmap(pctl, pin), reg_addr, bit); 151 return 0; 152 } 153 154 int mtk_pconf_spec_set_ies_smt_range(struct regmap *regmap, 155 const struct mtk_pin_ies_smt_set *ies_smt_infos, unsigned int info_num, 156 unsigned int pin, unsigned char align, int value) 157 { 158 unsigned int i, reg_addr, bit; 159 160 for (i = 0; i < info_num; i++) { 161 if (pin >= ies_smt_infos[i].start && 162 pin <= ies_smt_infos[i].end) { 163 break; 164 } 165 } 166 167 if (i == info_num) 168 return -EINVAL; 169 170 if (value) 171 reg_addr = ies_smt_infos[i].offset + align; 172 else 173 reg_addr = ies_smt_infos[i].offset + (align << 1); 174 175 bit = BIT(ies_smt_infos[i].bit); 176 regmap_write(regmap, reg_addr, bit); 177 return 0; 178 } 179 180 static const struct mtk_pin_drv_grp *mtk_find_pin_drv_grp_by_pin( 181 struct mtk_pinctrl *pctl, unsigned long pin) { 182 int i; 183 184 for (i = 0; i < pctl->devdata->n_pin_drv_grps; i++) { 185 const struct mtk_pin_drv_grp *pin_drv = 186 pctl->devdata->pin_drv_grp + i; 187 if (pin == pin_drv->pin) 188 return pin_drv; 189 } 190 191 return NULL; 192 } 193 194 static int mtk_pconf_set_driving(struct mtk_pinctrl *pctl, 195 unsigned int pin, unsigned char driving) 196 { 197 const struct mtk_pin_drv_grp *pin_drv; 198 unsigned int val; 199 unsigned int bits, mask, shift; 200 const struct mtk_drv_group_desc *drv_grp; 201 202 if (pin >= pctl->devdata->npins) 203 return -EINVAL; 204 205 pin_drv = mtk_find_pin_drv_grp_by_pin(pctl, pin); 206 if (!pin_drv || pin_drv->grp > pctl->devdata->n_grp_cls) 207 return -EINVAL; 208 209 drv_grp = pctl->devdata->grp_desc + pin_drv->grp; 210 if (driving >= drv_grp->min_drv && driving <= drv_grp->max_drv 211 && !(driving % drv_grp->step)) { 212 val = driving / drv_grp->step - 1; 213 bits = drv_grp->high_bit - drv_grp->low_bit + 1; 214 mask = BIT(bits) - 1; 215 shift = pin_drv->bit + drv_grp->low_bit; 216 mask <<= shift; 217 val <<= shift; 218 return regmap_update_bits(mtk_get_regmap(pctl, pin), 219 pin_drv->offset, mask, val); 220 } 221 222 return -EINVAL; 223 } 224 225 int mtk_pctrl_spec_pull_set_samereg(struct regmap *regmap, 226 const struct mtk_pin_spec_pupd_set_samereg *pupd_infos, 227 unsigned int info_num, unsigned int pin, 228 unsigned char align, bool isup, unsigned int r1r0) 229 { 230 unsigned int i; 231 unsigned int reg_pupd, reg_set, reg_rst; 232 unsigned int bit_pupd, bit_r0, bit_r1; 233 const struct mtk_pin_spec_pupd_set_samereg *spec_pupd_pin; 234 bool find = false; 235 236 for (i = 0; i < info_num; i++) { 237 if (pin == pupd_infos[i].pin) { 238 find = true; 239 break; 240 } 241 } 242 243 if (!find) 244 return -EINVAL; 245 246 spec_pupd_pin = pupd_infos + i; 247 reg_set = spec_pupd_pin->offset + align; 248 reg_rst = spec_pupd_pin->offset + (align << 1); 249 250 if (isup) 251 reg_pupd = reg_rst; 252 else 253 reg_pupd = reg_set; 254 255 bit_pupd = BIT(spec_pupd_pin->pupd_bit); 256 regmap_write(regmap, reg_pupd, bit_pupd); 257 258 bit_r0 = BIT(spec_pupd_pin->r0_bit); 259 bit_r1 = BIT(spec_pupd_pin->r1_bit); 260 261 switch (r1r0) { 262 case MTK_PUPD_SET_R1R0_00: 263 regmap_write(regmap, reg_rst, bit_r0); 264 regmap_write(regmap, reg_rst, bit_r1); 265 break; 266 case MTK_PUPD_SET_R1R0_01: 267 regmap_write(regmap, reg_set, bit_r0); 268 regmap_write(regmap, reg_rst, bit_r1); 269 break; 270 case MTK_PUPD_SET_R1R0_10: 271 regmap_write(regmap, reg_rst, bit_r0); 272 regmap_write(regmap, reg_set, bit_r1); 273 break; 274 case MTK_PUPD_SET_R1R0_11: 275 regmap_write(regmap, reg_set, bit_r0); 276 regmap_write(regmap, reg_set, bit_r1); 277 break; 278 default: 279 return -EINVAL; 280 } 281 282 return 0; 283 } 284 285 static int mtk_pconf_set_pull_select(struct mtk_pinctrl *pctl, 286 unsigned int pin, bool enable, bool isup, unsigned int arg) 287 { 288 unsigned int bit; 289 unsigned int reg_pullen, reg_pullsel, r1r0; 290 int ret; 291 292 /* Some pins' pull setting are very different, 293 * they have separate pull up/down bit, R0 and R1 294 * resistor bit, so we need this special handle. 295 */ 296 if (pctl->devdata->spec_pull_set) { 297 /* For special pins, bias-disable is set by R1R0, 298 * the parameter should be "MTK_PUPD_SET_R1R0_00". 299 */ 300 r1r0 = enable ? arg : MTK_PUPD_SET_R1R0_00; 301 ret = pctl->devdata->spec_pull_set(mtk_get_regmap(pctl, pin), 302 pin, pctl->devdata->port_align, isup, r1r0); 303 if (!ret) 304 return 0; 305 } 306 307 /* For generic pull config, default arg value should be 0 or 1. */ 308 if (arg != 0 && arg != 1) { 309 dev_err(pctl->dev, "invalid pull-up argument %d on pin %d .\n", 310 arg, pin); 311 return -EINVAL; 312 } 313 314 bit = BIT(pin & 0xf); 315 if (enable) 316 reg_pullen = SET_ADDR(mtk_get_port(pctl, pin) + 317 pctl->devdata->pullen_offset, pctl); 318 else 319 reg_pullen = CLR_ADDR(mtk_get_port(pctl, pin) + 320 pctl->devdata->pullen_offset, pctl); 321 322 if (isup) 323 reg_pullsel = SET_ADDR(mtk_get_port(pctl, pin) + 324 pctl->devdata->pullsel_offset, pctl); 325 else 326 reg_pullsel = CLR_ADDR(mtk_get_port(pctl, pin) + 327 pctl->devdata->pullsel_offset, pctl); 328 329 regmap_write(mtk_get_regmap(pctl, pin), reg_pullen, bit); 330 regmap_write(mtk_get_regmap(pctl, pin), reg_pullsel, bit); 331 return 0; 332 } 333 334 static int mtk_pconf_parse_conf(struct pinctrl_dev *pctldev, 335 unsigned int pin, enum pin_config_param param, 336 enum pin_config_param arg) 337 { 338 int ret = 0; 339 struct mtk_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev); 340 341 switch (param) { 342 case PIN_CONFIG_BIAS_DISABLE: 343 ret = mtk_pconf_set_pull_select(pctl, pin, false, false, arg); 344 break; 345 case PIN_CONFIG_BIAS_PULL_UP: 346 ret = mtk_pconf_set_pull_select(pctl, pin, true, true, arg); 347 break; 348 case PIN_CONFIG_BIAS_PULL_DOWN: 349 ret = mtk_pconf_set_pull_select(pctl, pin, true, false, arg); 350 break; 351 case PIN_CONFIG_INPUT_ENABLE: 352 mtk_pmx_gpio_set_direction(pctldev, NULL, pin, true); 353 ret = mtk_pconf_set_ies_smt(pctl, pin, arg, param); 354 break; 355 case PIN_CONFIG_OUTPUT: 356 mtk_gpio_set(pctl->chip, pin, arg); 357 ret = mtk_pmx_gpio_set_direction(pctldev, NULL, pin, false); 358 break; 359 case PIN_CONFIG_INPUT_SCHMITT_ENABLE: 360 mtk_pmx_gpio_set_direction(pctldev, NULL, pin, true); 361 ret = mtk_pconf_set_ies_smt(pctl, pin, arg, param); 362 break; 363 case PIN_CONFIG_DRIVE_STRENGTH: 364 ret = mtk_pconf_set_driving(pctl, pin, arg); 365 break; 366 default: 367 ret = -EINVAL; 368 } 369 370 return ret; 371 } 372 373 static int mtk_pconf_group_get(struct pinctrl_dev *pctldev, 374 unsigned group, 375 unsigned long *config) 376 { 377 struct mtk_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev); 378 379 *config = pctl->groups[group].config; 380 381 return 0; 382 } 383 384 static int mtk_pconf_group_set(struct pinctrl_dev *pctldev, unsigned group, 385 unsigned long *configs, unsigned num_configs) 386 { 387 struct mtk_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev); 388 struct mtk_pinctrl_group *g = &pctl->groups[group]; 389 int i, ret; 390 391 for (i = 0; i < num_configs; i++) { 392 ret = mtk_pconf_parse_conf(pctldev, g->pin, 393 pinconf_to_config_param(configs[i]), 394 pinconf_to_config_argument(configs[i])); 395 if (ret < 0) 396 return ret; 397 398 g->config = configs[i]; 399 } 400 401 return 0; 402 } 403 404 static const struct pinconf_ops mtk_pconf_ops = { 405 .pin_config_group_get = mtk_pconf_group_get, 406 .pin_config_group_set = mtk_pconf_group_set, 407 }; 408 409 static struct mtk_pinctrl_group * 410 mtk_pctrl_find_group_by_pin(struct mtk_pinctrl *pctl, u32 pin) 411 { 412 int i; 413 414 for (i = 0; i < pctl->ngroups; i++) { 415 struct mtk_pinctrl_group *grp = pctl->groups + i; 416 417 if (grp->pin == pin) 418 return grp; 419 } 420 421 return NULL; 422 } 423 424 static const struct mtk_desc_function *mtk_pctrl_find_function_by_pin( 425 struct mtk_pinctrl *pctl, u32 pin_num, u32 fnum) 426 { 427 const struct mtk_desc_pin *pin = pctl->devdata->pins + pin_num; 428 const struct mtk_desc_function *func = pin->functions; 429 430 while (func && func->name) { 431 if (func->muxval == fnum) 432 return func; 433 func++; 434 } 435 436 return NULL; 437 } 438 439 static bool mtk_pctrl_is_function_valid(struct mtk_pinctrl *pctl, 440 u32 pin_num, u32 fnum) 441 { 442 int i; 443 444 for (i = 0; i < pctl->devdata->npins; i++) { 445 const struct mtk_desc_pin *pin = pctl->devdata->pins + i; 446 447 if (pin->pin.number == pin_num) { 448 const struct mtk_desc_function *func = 449 pin->functions; 450 451 while (func && func->name) { 452 if (func->muxval == fnum) 453 return true; 454 func++; 455 } 456 457 break; 458 } 459 } 460 461 return false; 462 } 463 464 static int mtk_pctrl_dt_node_to_map_func(struct mtk_pinctrl *pctl, 465 u32 pin, u32 fnum, struct mtk_pinctrl_group *grp, 466 struct pinctrl_map **map, unsigned *reserved_maps, 467 unsigned *num_maps) 468 { 469 bool ret; 470 471 if (*num_maps == *reserved_maps) 472 return -ENOSPC; 473 474 (*map)[*num_maps].type = PIN_MAP_TYPE_MUX_GROUP; 475 (*map)[*num_maps].data.mux.group = grp->name; 476 477 ret = mtk_pctrl_is_function_valid(pctl, pin, fnum); 478 if (!ret) { 479 dev_err(pctl->dev, "invalid function %d on pin %d .\n", 480 fnum, pin); 481 return -EINVAL; 482 } 483 484 (*map)[*num_maps].data.mux.function = mtk_gpio_functions[fnum]; 485 (*num_maps)++; 486 487 return 0; 488 } 489 490 static int mtk_pctrl_dt_subnode_to_map(struct pinctrl_dev *pctldev, 491 struct device_node *node, 492 struct pinctrl_map **map, 493 unsigned *reserved_maps, 494 unsigned *num_maps) 495 { 496 struct property *pins; 497 u32 pinfunc, pin, func; 498 int num_pins, num_funcs, maps_per_pin; 499 unsigned long *configs; 500 unsigned int num_configs; 501 bool has_config = false; 502 int i, err; 503 unsigned reserve = 0; 504 struct mtk_pinctrl_group *grp; 505 struct mtk_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev); 506 507 pins = of_find_property(node, "pinmux", NULL); 508 if (!pins) { 509 dev_err(pctl->dev, "missing pins property in node %pOFn .\n", 510 node); 511 return -EINVAL; 512 } 513 514 err = pinconf_generic_parse_dt_config(node, pctldev, &configs, 515 &num_configs); 516 if (err) 517 return err; 518 519 if (num_configs) 520 has_config = true; 521 522 num_pins = pins->length / sizeof(u32); 523 num_funcs = num_pins; 524 maps_per_pin = 0; 525 if (num_funcs) 526 maps_per_pin++; 527 if (has_config && num_pins >= 1) 528 maps_per_pin++; 529 530 if (!num_pins || !maps_per_pin) { 531 err = -EINVAL; 532 goto exit; 533 } 534 535 reserve = num_pins * maps_per_pin; 536 537 err = pinctrl_utils_reserve_map(pctldev, map, 538 reserved_maps, num_maps, reserve); 539 if (err < 0) 540 goto exit; 541 542 for (i = 0; i < num_pins; i++) { 543 err = of_property_read_u32_index(node, "pinmux", 544 i, &pinfunc); 545 if (err) 546 goto exit; 547 548 pin = MTK_GET_PIN_NO(pinfunc); 549 func = MTK_GET_PIN_FUNC(pinfunc); 550 551 if (pin >= pctl->devdata->npins || 552 func >= ARRAY_SIZE(mtk_gpio_functions)) { 553 dev_err(pctl->dev, "invalid pins value.\n"); 554 err = -EINVAL; 555 goto exit; 556 } 557 558 grp = mtk_pctrl_find_group_by_pin(pctl, pin); 559 if (!grp) { 560 dev_err(pctl->dev, "unable to match pin %d to group\n", 561 pin); 562 err = -EINVAL; 563 goto exit; 564 } 565 566 err = mtk_pctrl_dt_node_to_map_func(pctl, pin, func, grp, map, 567 reserved_maps, num_maps); 568 if (err < 0) 569 goto exit; 570 571 if (has_config) { 572 err = pinctrl_utils_add_map_configs(pctldev, map, 573 reserved_maps, num_maps, grp->name, 574 configs, num_configs, 575 PIN_MAP_TYPE_CONFIGS_GROUP); 576 if (err < 0) 577 goto exit; 578 } 579 } 580 581 err = 0; 582 583 exit: 584 kfree(configs); 585 return err; 586 } 587 588 static int mtk_pctrl_dt_node_to_map(struct pinctrl_dev *pctldev, 589 struct device_node *np_config, 590 struct pinctrl_map **map, unsigned *num_maps) 591 { 592 struct device_node *np; 593 unsigned reserved_maps; 594 int ret; 595 596 *map = NULL; 597 *num_maps = 0; 598 reserved_maps = 0; 599 600 for_each_child_of_node(np_config, np) { 601 ret = mtk_pctrl_dt_subnode_to_map(pctldev, np, map, 602 &reserved_maps, num_maps); 603 if (ret < 0) { 604 pinctrl_utils_free_map(pctldev, *map, *num_maps); 605 of_node_put(np); 606 return ret; 607 } 608 } 609 610 return 0; 611 } 612 613 static int mtk_pctrl_get_groups_count(struct pinctrl_dev *pctldev) 614 { 615 struct mtk_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev); 616 617 return pctl->ngroups; 618 } 619 620 static const char *mtk_pctrl_get_group_name(struct pinctrl_dev *pctldev, 621 unsigned group) 622 { 623 struct mtk_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev); 624 625 return pctl->groups[group].name; 626 } 627 628 static int mtk_pctrl_get_group_pins(struct pinctrl_dev *pctldev, 629 unsigned group, 630 const unsigned **pins, 631 unsigned *num_pins) 632 { 633 struct mtk_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev); 634 635 *pins = (unsigned *)&pctl->groups[group].pin; 636 *num_pins = 1; 637 638 return 0; 639 } 640 641 static const struct pinctrl_ops mtk_pctrl_ops = { 642 .dt_node_to_map = mtk_pctrl_dt_node_to_map, 643 .dt_free_map = pinctrl_utils_free_map, 644 .get_groups_count = mtk_pctrl_get_groups_count, 645 .get_group_name = mtk_pctrl_get_group_name, 646 .get_group_pins = mtk_pctrl_get_group_pins, 647 }; 648 649 static int mtk_pmx_get_funcs_cnt(struct pinctrl_dev *pctldev) 650 { 651 return ARRAY_SIZE(mtk_gpio_functions); 652 } 653 654 static const char *mtk_pmx_get_func_name(struct pinctrl_dev *pctldev, 655 unsigned selector) 656 { 657 return mtk_gpio_functions[selector]; 658 } 659 660 static int mtk_pmx_get_func_groups(struct pinctrl_dev *pctldev, 661 unsigned function, 662 const char * const **groups, 663 unsigned * const num_groups) 664 { 665 struct mtk_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev); 666 667 *groups = pctl->grp_names; 668 *num_groups = pctl->ngroups; 669 670 return 0; 671 } 672 673 static int mtk_pmx_set_mode(struct pinctrl_dev *pctldev, 674 unsigned long pin, unsigned long mode) 675 { 676 unsigned int reg_addr; 677 unsigned char bit; 678 unsigned int val; 679 unsigned int mask = (1L << GPIO_MODE_BITS) - 1; 680 struct mtk_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev); 681 682 if (pctl->devdata->spec_pinmux_set) 683 pctl->devdata->spec_pinmux_set(mtk_get_regmap(pctl, pin), 684 pin, mode); 685 686 reg_addr = ((pin / MAX_GPIO_MODE_PER_REG) << pctl->devdata->port_shf) 687 + pctl->devdata->pinmux_offset; 688 689 mode &= mask; 690 bit = pin % MAX_GPIO_MODE_PER_REG; 691 mask <<= (GPIO_MODE_BITS * bit); 692 val = (mode << (GPIO_MODE_BITS * bit)); 693 return regmap_update_bits(mtk_get_regmap(pctl, pin), 694 reg_addr, mask, val); 695 } 696 697 static const struct mtk_desc_pin * 698 mtk_find_pin_by_eint_num(struct mtk_pinctrl *pctl, unsigned int eint_num) 699 { 700 int i; 701 const struct mtk_desc_pin *pin; 702 703 for (i = 0; i < pctl->devdata->npins; i++) { 704 pin = pctl->devdata->pins + i; 705 if (pin->eint.eintnum == eint_num) 706 return pin; 707 } 708 709 return NULL; 710 } 711 712 static int mtk_pmx_set_mux(struct pinctrl_dev *pctldev, 713 unsigned function, 714 unsigned group) 715 { 716 bool ret; 717 const struct mtk_desc_function *desc; 718 struct mtk_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev); 719 struct mtk_pinctrl_group *g = pctl->groups + group; 720 721 ret = mtk_pctrl_is_function_valid(pctl, g->pin, function); 722 if (!ret) { 723 dev_err(pctl->dev, "invalid function %d on group %d .\n", 724 function, group); 725 return -EINVAL; 726 } 727 728 desc = mtk_pctrl_find_function_by_pin(pctl, g->pin, function); 729 if (!desc) 730 return -EINVAL; 731 mtk_pmx_set_mode(pctldev, g->pin, desc->muxval); 732 return 0; 733 } 734 735 static int mtk_pmx_find_gpio_mode(struct mtk_pinctrl *pctl, 736 unsigned offset) 737 { 738 const struct mtk_desc_pin *pin = pctl->devdata->pins + offset; 739 const struct mtk_desc_function *func = pin->functions; 740 741 while (func && func->name) { 742 if (!strncmp(func->name, GPIO_MODE_PREFIX, 743 sizeof(GPIO_MODE_PREFIX)-1)) 744 return func->muxval; 745 func++; 746 } 747 return -EINVAL; 748 } 749 750 static int mtk_pmx_gpio_request_enable(struct pinctrl_dev *pctldev, 751 struct pinctrl_gpio_range *range, 752 unsigned offset) 753 { 754 int muxval; 755 struct mtk_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev); 756 757 muxval = mtk_pmx_find_gpio_mode(pctl, offset); 758 759 if (muxval < 0) { 760 dev_err(pctl->dev, "invalid gpio pin %d.\n", offset); 761 return -EINVAL; 762 } 763 764 mtk_pmx_set_mode(pctldev, offset, muxval); 765 mtk_pconf_set_ies_smt(pctl, offset, 1, PIN_CONFIG_INPUT_ENABLE); 766 767 return 0; 768 } 769 770 static const struct pinmux_ops mtk_pmx_ops = { 771 .get_functions_count = mtk_pmx_get_funcs_cnt, 772 .get_function_name = mtk_pmx_get_func_name, 773 .get_function_groups = mtk_pmx_get_func_groups, 774 .set_mux = mtk_pmx_set_mux, 775 .gpio_set_direction = mtk_pmx_gpio_set_direction, 776 .gpio_request_enable = mtk_pmx_gpio_request_enable, 777 }; 778 779 static int mtk_gpio_direction_input(struct gpio_chip *chip, 780 unsigned offset) 781 { 782 return pinctrl_gpio_direction_input(chip->base + offset); 783 } 784 785 static int mtk_gpio_direction_output(struct gpio_chip *chip, 786 unsigned offset, int value) 787 { 788 mtk_gpio_set(chip, offset, value); 789 return pinctrl_gpio_direction_output(chip->base + offset); 790 } 791 792 static int mtk_gpio_get_direction(struct gpio_chip *chip, unsigned offset) 793 { 794 unsigned int reg_addr; 795 unsigned int bit; 796 unsigned int read_val = 0; 797 798 struct mtk_pinctrl *pctl = gpiochip_get_data(chip); 799 800 reg_addr = mtk_get_port(pctl, offset) + pctl->devdata->dir_offset; 801 bit = BIT(offset & 0xf); 802 803 if (pctl->devdata->spec_dir_set) 804 pctl->devdata->spec_dir_set(®_addr, offset); 805 806 regmap_read(pctl->regmap1, reg_addr, &read_val); 807 if (read_val & bit) 808 return GPIO_LINE_DIRECTION_OUT; 809 810 return GPIO_LINE_DIRECTION_IN; 811 } 812 813 static int mtk_gpio_get(struct gpio_chip *chip, unsigned offset) 814 { 815 unsigned int reg_addr; 816 unsigned int bit; 817 unsigned int read_val = 0; 818 struct mtk_pinctrl *pctl = gpiochip_get_data(chip); 819 820 reg_addr = mtk_get_port(pctl, offset) + 821 pctl->devdata->din_offset; 822 823 bit = BIT(offset & 0xf); 824 regmap_read(pctl->regmap1, reg_addr, &read_val); 825 return !!(read_val & bit); 826 } 827 828 static int mtk_gpio_to_irq(struct gpio_chip *chip, unsigned offset) 829 { 830 struct mtk_pinctrl *pctl = gpiochip_get_data(chip); 831 const struct mtk_desc_pin *pin; 832 unsigned long eint_n; 833 834 pin = pctl->devdata->pins + offset; 835 if (pin->eint.eintnum == NO_EINT_SUPPORT) 836 return -EINVAL; 837 838 eint_n = pin->eint.eintnum; 839 840 return mtk_eint_find_irq(pctl->eint, eint_n); 841 } 842 843 static int mtk_gpio_set_config(struct gpio_chip *chip, unsigned offset, 844 unsigned long config) 845 { 846 struct mtk_pinctrl *pctl = gpiochip_get_data(chip); 847 const struct mtk_desc_pin *pin; 848 unsigned long eint_n; 849 u32 debounce; 850 851 if (pinconf_to_config_param(config) != PIN_CONFIG_INPUT_DEBOUNCE) 852 return -ENOTSUPP; 853 854 pin = pctl->devdata->pins + offset; 855 if (pin->eint.eintnum == NO_EINT_SUPPORT) 856 return -EINVAL; 857 858 debounce = pinconf_to_config_argument(config); 859 eint_n = pin->eint.eintnum; 860 861 return mtk_eint_set_debounce(pctl->eint, eint_n, debounce); 862 } 863 864 static const struct gpio_chip mtk_gpio_chip = { 865 .owner = THIS_MODULE, 866 .request = gpiochip_generic_request, 867 .free = gpiochip_generic_free, 868 .get_direction = mtk_gpio_get_direction, 869 .direction_input = mtk_gpio_direction_input, 870 .direction_output = mtk_gpio_direction_output, 871 .get = mtk_gpio_get, 872 .set = mtk_gpio_set, 873 .to_irq = mtk_gpio_to_irq, 874 .set_config = mtk_gpio_set_config, 875 .of_gpio_n_cells = 2, 876 }; 877 878 static int mtk_eint_suspend(struct device *device) 879 { 880 struct mtk_pinctrl *pctl = dev_get_drvdata(device); 881 882 return mtk_eint_do_suspend(pctl->eint); 883 } 884 885 static int mtk_eint_resume(struct device *device) 886 { 887 struct mtk_pinctrl *pctl = dev_get_drvdata(device); 888 889 return mtk_eint_do_resume(pctl->eint); 890 } 891 892 const struct dev_pm_ops mtk_eint_pm_ops = { 893 .suspend_noirq = mtk_eint_suspend, 894 .resume_noirq = mtk_eint_resume, 895 }; 896 897 static int mtk_pctrl_build_state(struct platform_device *pdev) 898 { 899 struct mtk_pinctrl *pctl = platform_get_drvdata(pdev); 900 int i; 901 902 pctl->ngroups = pctl->devdata->npins; 903 904 /* Allocate groups */ 905 pctl->groups = devm_kcalloc(&pdev->dev, pctl->ngroups, 906 sizeof(*pctl->groups), GFP_KERNEL); 907 if (!pctl->groups) 908 return -ENOMEM; 909 910 /* We assume that one pin is one group, use pin name as group name. */ 911 pctl->grp_names = devm_kcalloc(&pdev->dev, pctl->ngroups, 912 sizeof(*pctl->grp_names), GFP_KERNEL); 913 if (!pctl->grp_names) 914 return -ENOMEM; 915 916 for (i = 0; i < pctl->devdata->npins; i++) { 917 const struct mtk_desc_pin *pin = pctl->devdata->pins + i; 918 struct mtk_pinctrl_group *group = pctl->groups + i; 919 920 group->name = pin->pin.name; 921 group->pin = pin->pin.number; 922 923 pctl->grp_names[i] = pin->pin.name; 924 } 925 926 return 0; 927 } 928 929 static int 930 mtk_xt_get_gpio_n(void *data, unsigned long eint_n, unsigned int *gpio_n, 931 struct gpio_chip **gpio_chip) 932 { 933 struct mtk_pinctrl *pctl = (struct mtk_pinctrl *)data; 934 const struct mtk_desc_pin *pin; 935 936 pin = mtk_find_pin_by_eint_num(pctl, eint_n); 937 if (!pin) 938 return -EINVAL; 939 940 *gpio_chip = pctl->chip; 941 *gpio_n = pin->pin.number; 942 943 return 0; 944 } 945 946 static int mtk_xt_get_gpio_state(void *data, unsigned long eint_n) 947 { 948 struct mtk_pinctrl *pctl = (struct mtk_pinctrl *)data; 949 const struct mtk_desc_pin *pin; 950 951 pin = mtk_find_pin_by_eint_num(pctl, eint_n); 952 if (!pin) 953 return -EINVAL; 954 955 return mtk_gpio_get(pctl->chip, pin->pin.number); 956 } 957 958 static int mtk_xt_set_gpio_as_eint(void *data, unsigned long eint_n) 959 { 960 struct mtk_pinctrl *pctl = (struct mtk_pinctrl *)data; 961 const struct mtk_desc_pin *pin; 962 963 pin = mtk_find_pin_by_eint_num(pctl, eint_n); 964 if (!pin) 965 return -EINVAL; 966 967 /* set mux to INT mode */ 968 mtk_pmx_set_mode(pctl->pctl_dev, pin->pin.number, pin->eint.eintmux); 969 /* set gpio direction to input */ 970 mtk_pmx_gpio_set_direction(pctl->pctl_dev, NULL, pin->pin.number, 971 true); 972 /* set input-enable */ 973 mtk_pconf_set_ies_smt(pctl, pin->pin.number, 1, 974 PIN_CONFIG_INPUT_ENABLE); 975 976 return 0; 977 } 978 979 static const struct mtk_eint_xt mtk_eint_xt = { 980 .get_gpio_n = mtk_xt_get_gpio_n, 981 .get_gpio_state = mtk_xt_get_gpio_state, 982 .set_gpio_as_eint = mtk_xt_set_gpio_as_eint, 983 }; 984 985 static int mtk_eint_init(struct mtk_pinctrl *pctl, struct platform_device *pdev) 986 { 987 struct device_node *np = pdev->dev.of_node; 988 989 if (!of_property_read_bool(np, "interrupt-controller")) 990 return -ENODEV; 991 992 pctl->eint = devm_kzalloc(pctl->dev, sizeof(*pctl->eint), GFP_KERNEL); 993 if (!pctl->eint) 994 return -ENOMEM; 995 996 pctl->eint->base = devm_platform_ioremap_resource(pdev, 0); 997 if (IS_ERR(pctl->eint->base)) 998 return PTR_ERR(pctl->eint->base); 999 1000 pctl->eint->irq = irq_of_parse_and_map(np, 0); 1001 if (!pctl->eint->irq) 1002 return -EINVAL; 1003 1004 pctl->eint->dev = &pdev->dev; 1005 /* 1006 * If pctl->eint->regs == NULL, it would fall back into using a generic 1007 * register map in mtk_eint_do_init calls. 1008 */ 1009 pctl->eint->regs = pctl->devdata->eint_regs; 1010 pctl->eint->hw = &pctl->devdata->eint_hw; 1011 pctl->eint->pctl = pctl; 1012 pctl->eint->gpio_xlate = &mtk_eint_xt; 1013 1014 return mtk_eint_do_init(pctl->eint); 1015 } 1016 1017 int mtk_pctrl_init(struct platform_device *pdev, 1018 const struct mtk_pinctrl_devdata *data, 1019 struct regmap *regmap) 1020 { 1021 struct pinctrl_pin_desc *pins; 1022 struct mtk_pinctrl *pctl; 1023 struct device_node *np = pdev->dev.of_node, *node; 1024 struct property *prop; 1025 int ret, i; 1026 1027 pctl = devm_kzalloc(&pdev->dev, sizeof(*pctl), GFP_KERNEL); 1028 if (!pctl) 1029 return -ENOMEM; 1030 1031 platform_set_drvdata(pdev, pctl); 1032 1033 prop = of_find_property(np, "pins-are-numbered", NULL); 1034 if (!prop) { 1035 dev_err(&pdev->dev, "only support pins-are-numbered format\n"); 1036 return -EINVAL; 1037 } 1038 1039 node = of_parse_phandle(np, "mediatek,pctl-regmap", 0); 1040 if (node) { 1041 pctl->regmap1 = syscon_node_to_regmap(node); 1042 if (IS_ERR(pctl->regmap1)) 1043 return PTR_ERR(pctl->regmap1); 1044 } else if (regmap) { 1045 pctl->regmap1 = regmap; 1046 } else { 1047 dev_err(&pdev->dev, "Pinctrl node has not register regmap.\n"); 1048 return -EINVAL; 1049 } 1050 1051 /* Only 8135 has two base addr, other SoCs have only one. */ 1052 node = of_parse_phandle(np, "mediatek,pctl-regmap", 1); 1053 if (node) { 1054 pctl->regmap2 = syscon_node_to_regmap(node); 1055 if (IS_ERR(pctl->regmap2)) 1056 return PTR_ERR(pctl->regmap2); 1057 } 1058 1059 pctl->devdata = data; 1060 ret = mtk_pctrl_build_state(pdev); 1061 if (ret) { 1062 dev_err(&pdev->dev, "build state failed: %d\n", ret); 1063 return -EINVAL; 1064 } 1065 1066 pins = devm_kcalloc(&pdev->dev, pctl->devdata->npins, sizeof(*pins), 1067 GFP_KERNEL); 1068 if (!pins) 1069 return -ENOMEM; 1070 1071 for (i = 0; i < pctl->devdata->npins; i++) 1072 pins[i] = pctl->devdata->pins[i].pin; 1073 1074 pctl->pctl_desc.name = dev_name(&pdev->dev); 1075 pctl->pctl_desc.owner = THIS_MODULE; 1076 pctl->pctl_desc.pins = pins; 1077 pctl->pctl_desc.npins = pctl->devdata->npins; 1078 pctl->pctl_desc.confops = &mtk_pconf_ops; 1079 pctl->pctl_desc.pctlops = &mtk_pctrl_ops; 1080 pctl->pctl_desc.pmxops = &mtk_pmx_ops; 1081 pctl->dev = &pdev->dev; 1082 1083 pctl->pctl_dev = devm_pinctrl_register(&pdev->dev, &pctl->pctl_desc, 1084 pctl); 1085 if (IS_ERR(pctl->pctl_dev)) { 1086 dev_err(&pdev->dev, "couldn't register pinctrl driver\n"); 1087 return PTR_ERR(pctl->pctl_dev); 1088 } 1089 1090 pctl->chip = devm_kzalloc(&pdev->dev, sizeof(*pctl->chip), GFP_KERNEL); 1091 if (!pctl->chip) 1092 return -ENOMEM; 1093 1094 *pctl->chip = mtk_gpio_chip; 1095 pctl->chip->ngpio = pctl->devdata->npins; 1096 pctl->chip->label = dev_name(&pdev->dev); 1097 pctl->chip->parent = &pdev->dev; 1098 pctl->chip->base = -1; 1099 1100 ret = gpiochip_add_data(pctl->chip, pctl); 1101 if (ret) 1102 return -EINVAL; 1103 1104 /* Register the GPIO to pin mappings. */ 1105 ret = gpiochip_add_pin_range(pctl->chip, dev_name(&pdev->dev), 1106 0, 0, pctl->devdata->npins); 1107 if (ret) { 1108 ret = -EINVAL; 1109 goto chip_error; 1110 } 1111 1112 ret = mtk_eint_init(pctl, pdev); 1113 if (ret) 1114 goto chip_error; 1115 1116 return 0; 1117 1118 chip_error: 1119 gpiochip_remove(pctl->chip); 1120 return ret; 1121 } 1122