1 /* 2 * Allwinner A1X SoCs pinctrl driver. 3 * 4 * Copyright (C) 2012 Maxime Ripard 5 * 6 * Maxime Ripard <maxime.ripard@free-electrons.com> 7 * 8 * This file is licensed under the terms of the GNU General Public 9 * License version 2. This program is licensed "as is" without any 10 * warranty of any kind, whether express or implied. 11 */ 12 13 #include <linux/io.h> 14 #include <linux/clk.h> 15 #include <linux/gpio/driver.h> 16 #include <linux/interrupt.h> 17 #include <linux/irqdomain.h> 18 #include <linux/irqchip/chained_irq.h> 19 #include <linux/export.h> 20 #include <linux/of.h> 21 #include <linux/of_clk.h> 22 #include <linux/of_address.h> 23 #include <linux/of_device.h> 24 #include <linux/of_irq.h> 25 #include <linux/pinctrl/consumer.h> 26 #include <linux/pinctrl/machine.h> 27 #include <linux/pinctrl/pinctrl.h> 28 #include <linux/pinctrl/pinconf-generic.h> 29 #include <linux/pinctrl/pinmux.h> 30 #include <linux/regulator/consumer.h> 31 #include <linux/platform_device.h> 32 #include <linux/slab.h> 33 34 #include <dt-bindings/pinctrl/sun4i-a10.h> 35 36 #include "../core.h" 37 #include "pinctrl-sunxi.h" 38 39 static struct irq_chip sunxi_pinctrl_edge_irq_chip; 40 static struct irq_chip sunxi_pinctrl_level_irq_chip; 41 42 static struct sunxi_pinctrl_group * 43 sunxi_pinctrl_find_group_by_name(struct sunxi_pinctrl *pctl, const char *group) 44 { 45 int i; 46 47 for (i = 0; i < pctl->ngroups; i++) { 48 struct sunxi_pinctrl_group *grp = pctl->groups + i; 49 50 if (!strcmp(grp->name, group)) 51 return grp; 52 } 53 54 return NULL; 55 } 56 57 static struct sunxi_pinctrl_function * 58 sunxi_pinctrl_find_function_by_name(struct sunxi_pinctrl *pctl, 59 const char *name) 60 { 61 struct sunxi_pinctrl_function *func = pctl->functions; 62 int i; 63 64 for (i = 0; i < pctl->nfunctions; i++) { 65 if (!func[i].name) 66 break; 67 68 if (!strcmp(func[i].name, name)) 69 return func + i; 70 } 71 72 return NULL; 73 } 74 75 static struct sunxi_desc_function * 76 sunxi_pinctrl_desc_find_function_by_name(struct sunxi_pinctrl *pctl, 77 const char *pin_name, 78 const char *func_name) 79 { 80 int i; 81 82 for (i = 0; i < pctl->desc->npins; i++) { 83 const struct sunxi_desc_pin *pin = pctl->desc->pins + i; 84 85 if (!strcmp(pin->pin.name, pin_name)) { 86 struct sunxi_desc_function *func = pin->functions; 87 88 while (func->name) { 89 if (!strcmp(func->name, func_name) && 90 (!func->variant || 91 func->variant & pctl->variant)) 92 return func; 93 94 func++; 95 } 96 } 97 } 98 99 return NULL; 100 } 101 102 static struct sunxi_desc_function * 103 sunxi_pinctrl_desc_find_function_by_pin(struct sunxi_pinctrl *pctl, 104 const u16 pin_num, 105 const char *func_name) 106 { 107 int i; 108 109 for (i = 0; i < pctl->desc->npins; i++) { 110 const struct sunxi_desc_pin *pin = pctl->desc->pins + i; 111 112 if (pin->pin.number == pin_num) { 113 struct sunxi_desc_function *func = pin->functions; 114 115 while (func->name) { 116 if (!strcmp(func->name, func_name)) 117 return func; 118 119 func++; 120 } 121 } 122 } 123 124 return NULL; 125 } 126 127 static int sunxi_pctrl_get_groups_count(struct pinctrl_dev *pctldev) 128 { 129 struct sunxi_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev); 130 131 return pctl->ngroups; 132 } 133 134 static const char *sunxi_pctrl_get_group_name(struct pinctrl_dev *pctldev, 135 unsigned group) 136 { 137 struct sunxi_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev); 138 139 return pctl->groups[group].name; 140 } 141 142 static int sunxi_pctrl_get_group_pins(struct pinctrl_dev *pctldev, 143 unsigned group, 144 const unsigned **pins, 145 unsigned *num_pins) 146 { 147 struct sunxi_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev); 148 149 *pins = (unsigned *)&pctl->groups[group].pin; 150 *num_pins = 1; 151 152 return 0; 153 } 154 155 static bool sunxi_pctrl_has_bias_prop(struct device_node *node) 156 { 157 return of_find_property(node, "bias-pull-up", NULL) || 158 of_find_property(node, "bias-pull-down", NULL) || 159 of_find_property(node, "bias-disable", NULL) || 160 of_find_property(node, "allwinner,pull", NULL); 161 } 162 163 static bool sunxi_pctrl_has_drive_prop(struct device_node *node) 164 { 165 return of_find_property(node, "drive-strength", NULL) || 166 of_find_property(node, "allwinner,drive", NULL); 167 } 168 169 static int sunxi_pctrl_parse_bias_prop(struct device_node *node) 170 { 171 u32 val; 172 173 /* Try the new style binding */ 174 if (of_find_property(node, "bias-pull-up", NULL)) 175 return PIN_CONFIG_BIAS_PULL_UP; 176 177 if (of_find_property(node, "bias-pull-down", NULL)) 178 return PIN_CONFIG_BIAS_PULL_DOWN; 179 180 if (of_find_property(node, "bias-disable", NULL)) 181 return PIN_CONFIG_BIAS_DISABLE; 182 183 /* And fall back to the old binding */ 184 if (of_property_read_u32(node, "allwinner,pull", &val)) 185 return -EINVAL; 186 187 switch (val) { 188 case SUN4I_PINCTRL_NO_PULL: 189 return PIN_CONFIG_BIAS_DISABLE; 190 case SUN4I_PINCTRL_PULL_UP: 191 return PIN_CONFIG_BIAS_PULL_UP; 192 case SUN4I_PINCTRL_PULL_DOWN: 193 return PIN_CONFIG_BIAS_PULL_DOWN; 194 } 195 196 return -EINVAL; 197 } 198 199 static int sunxi_pctrl_parse_drive_prop(struct device_node *node) 200 { 201 u32 val; 202 203 /* Try the new style binding */ 204 if (!of_property_read_u32(node, "drive-strength", &val)) { 205 /* We can't go below 10mA ... */ 206 if (val < 10) 207 return -EINVAL; 208 209 /* ... and only up to 40 mA ... */ 210 if (val > 40) 211 val = 40; 212 213 /* by steps of 10 mA */ 214 return rounddown(val, 10); 215 } 216 217 /* And then fall back to the old binding */ 218 if (of_property_read_u32(node, "allwinner,drive", &val)) 219 return -EINVAL; 220 221 return (val + 1) * 10; 222 } 223 224 static const char *sunxi_pctrl_parse_function_prop(struct device_node *node) 225 { 226 const char *function; 227 int ret; 228 229 /* Try the generic binding */ 230 ret = of_property_read_string(node, "function", &function); 231 if (!ret) 232 return function; 233 234 /* And fall back to our legacy one */ 235 ret = of_property_read_string(node, "allwinner,function", &function); 236 if (!ret) 237 return function; 238 239 return NULL; 240 } 241 242 static const char *sunxi_pctrl_find_pins_prop(struct device_node *node, 243 int *npins) 244 { 245 int count; 246 247 /* Try the generic binding */ 248 count = of_property_count_strings(node, "pins"); 249 if (count > 0) { 250 *npins = count; 251 return "pins"; 252 } 253 254 /* And fall back to our legacy one */ 255 count = of_property_count_strings(node, "allwinner,pins"); 256 if (count > 0) { 257 *npins = count; 258 return "allwinner,pins"; 259 } 260 261 return NULL; 262 } 263 264 static unsigned long *sunxi_pctrl_build_pin_config(struct device_node *node, 265 unsigned int *len) 266 { 267 unsigned long *pinconfig; 268 unsigned int configlen = 0, idx = 0; 269 int ret; 270 271 if (sunxi_pctrl_has_drive_prop(node)) 272 configlen++; 273 if (sunxi_pctrl_has_bias_prop(node)) 274 configlen++; 275 276 /* 277 * If we don't have any configuration, bail out 278 */ 279 if (!configlen) 280 return NULL; 281 282 pinconfig = kcalloc(configlen, sizeof(*pinconfig), GFP_KERNEL); 283 if (!pinconfig) 284 return ERR_PTR(-ENOMEM); 285 286 if (sunxi_pctrl_has_drive_prop(node)) { 287 int drive = sunxi_pctrl_parse_drive_prop(node); 288 if (drive < 0) { 289 ret = drive; 290 goto err_free; 291 } 292 293 pinconfig[idx++] = pinconf_to_config_packed(PIN_CONFIG_DRIVE_STRENGTH, 294 drive); 295 } 296 297 if (sunxi_pctrl_has_bias_prop(node)) { 298 int pull = sunxi_pctrl_parse_bias_prop(node); 299 int arg = 0; 300 if (pull < 0) { 301 ret = pull; 302 goto err_free; 303 } 304 305 if (pull != PIN_CONFIG_BIAS_DISABLE) 306 arg = 1; /* hardware uses weak pull resistors */ 307 308 pinconfig[idx++] = pinconf_to_config_packed(pull, arg); 309 } 310 311 312 *len = configlen; 313 return pinconfig; 314 315 err_free: 316 kfree(pinconfig); 317 return ERR_PTR(ret); 318 } 319 320 static int sunxi_pctrl_dt_node_to_map(struct pinctrl_dev *pctldev, 321 struct device_node *node, 322 struct pinctrl_map **map, 323 unsigned *num_maps) 324 { 325 struct sunxi_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev); 326 unsigned long *pinconfig; 327 struct property *prop; 328 const char *function, *pin_prop; 329 const char *group; 330 int ret, npins, nmaps, configlen = 0, i = 0; 331 332 *map = NULL; 333 *num_maps = 0; 334 335 function = sunxi_pctrl_parse_function_prop(node); 336 if (!function) { 337 dev_err(pctl->dev, "missing function property in node %pOFn\n", 338 node); 339 return -EINVAL; 340 } 341 342 pin_prop = sunxi_pctrl_find_pins_prop(node, &npins); 343 if (!pin_prop) { 344 dev_err(pctl->dev, "missing pins property in node %pOFn\n", 345 node); 346 return -EINVAL; 347 } 348 349 /* 350 * We have two maps for each pin: one for the function, one 351 * for the configuration (bias, strength, etc). 352 * 353 * We might be slightly overshooting, since we might not have 354 * any configuration. 355 */ 356 nmaps = npins * 2; 357 *map = kmalloc_array(nmaps, sizeof(struct pinctrl_map), GFP_KERNEL); 358 if (!*map) 359 return -ENOMEM; 360 361 pinconfig = sunxi_pctrl_build_pin_config(node, &configlen); 362 if (IS_ERR(pinconfig)) { 363 ret = PTR_ERR(pinconfig); 364 goto err_free_map; 365 } 366 367 of_property_for_each_string(node, pin_prop, prop, group) { 368 struct sunxi_pinctrl_group *grp = 369 sunxi_pinctrl_find_group_by_name(pctl, group); 370 371 if (!grp) { 372 dev_err(pctl->dev, "unknown pin %s", group); 373 continue; 374 } 375 376 if (!sunxi_pinctrl_desc_find_function_by_name(pctl, 377 grp->name, 378 function)) { 379 dev_err(pctl->dev, "unsupported function %s on pin %s", 380 function, group); 381 continue; 382 } 383 384 (*map)[i].type = PIN_MAP_TYPE_MUX_GROUP; 385 (*map)[i].data.mux.group = group; 386 (*map)[i].data.mux.function = function; 387 388 i++; 389 390 if (pinconfig) { 391 (*map)[i].type = PIN_MAP_TYPE_CONFIGS_GROUP; 392 (*map)[i].data.configs.group_or_pin = group; 393 (*map)[i].data.configs.configs = pinconfig; 394 (*map)[i].data.configs.num_configs = configlen; 395 i++; 396 } 397 } 398 399 *num_maps = i; 400 401 /* 402 * We know have the number of maps we need, we can resize our 403 * map array 404 */ 405 *map = krealloc(*map, i * sizeof(struct pinctrl_map), GFP_KERNEL); 406 if (!*map) 407 return -ENOMEM; 408 409 return 0; 410 411 err_free_map: 412 kfree(*map); 413 *map = NULL; 414 return ret; 415 } 416 417 static void sunxi_pctrl_dt_free_map(struct pinctrl_dev *pctldev, 418 struct pinctrl_map *map, 419 unsigned num_maps) 420 { 421 int i; 422 423 /* pin config is never in the first map */ 424 for (i = 1; i < num_maps; i++) { 425 if (map[i].type != PIN_MAP_TYPE_CONFIGS_GROUP) 426 continue; 427 428 /* 429 * All the maps share the same pin config, 430 * free only the first one we find. 431 */ 432 kfree(map[i].data.configs.configs); 433 break; 434 } 435 436 kfree(map); 437 } 438 439 static const struct pinctrl_ops sunxi_pctrl_ops = { 440 .dt_node_to_map = sunxi_pctrl_dt_node_to_map, 441 .dt_free_map = sunxi_pctrl_dt_free_map, 442 .get_groups_count = sunxi_pctrl_get_groups_count, 443 .get_group_name = sunxi_pctrl_get_group_name, 444 .get_group_pins = sunxi_pctrl_get_group_pins, 445 }; 446 447 static int sunxi_pconf_reg(unsigned pin, enum pin_config_param param, 448 u32 *offset, u32 *shift, u32 *mask) 449 { 450 switch (param) { 451 case PIN_CONFIG_DRIVE_STRENGTH: 452 *offset = sunxi_dlevel_reg(pin); 453 *shift = sunxi_dlevel_offset(pin); 454 *mask = DLEVEL_PINS_MASK; 455 break; 456 457 case PIN_CONFIG_BIAS_PULL_UP: 458 case PIN_CONFIG_BIAS_PULL_DOWN: 459 case PIN_CONFIG_BIAS_DISABLE: 460 *offset = sunxi_pull_reg(pin); 461 *shift = sunxi_pull_offset(pin); 462 *mask = PULL_PINS_MASK; 463 break; 464 465 default: 466 return -ENOTSUPP; 467 } 468 469 return 0; 470 } 471 472 static int sunxi_pconf_get(struct pinctrl_dev *pctldev, unsigned pin, 473 unsigned long *config) 474 { 475 struct sunxi_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev); 476 enum pin_config_param param = pinconf_to_config_param(*config); 477 u32 offset, shift, mask, val; 478 u16 arg; 479 int ret; 480 481 pin -= pctl->desc->pin_base; 482 483 ret = sunxi_pconf_reg(pin, param, &offset, &shift, &mask); 484 if (ret < 0) 485 return ret; 486 487 val = (readl(pctl->membase + offset) >> shift) & mask; 488 489 switch (pinconf_to_config_param(*config)) { 490 case PIN_CONFIG_DRIVE_STRENGTH: 491 arg = (val + 1) * 10; 492 break; 493 494 case PIN_CONFIG_BIAS_PULL_UP: 495 if (val != SUN4I_PINCTRL_PULL_UP) 496 return -EINVAL; 497 arg = 1; /* hardware is weak pull-up */ 498 break; 499 500 case PIN_CONFIG_BIAS_PULL_DOWN: 501 if (val != SUN4I_PINCTRL_PULL_DOWN) 502 return -EINVAL; 503 arg = 1; /* hardware is weak pull-down */ 504 break; 505 506 case PIN_CONFIG_BIAS_DISABLE: 507 if (val != SUN4I_PINCTRL_NO_PULL) 508 return -EINVAL; 509 arg = 0; 510 break; 511 512 default: 513 /* sunxi_pconf_reg should catch anything unsupported */ 514 WARN_ON(1); 515 return -ENOTSUPP; 516 } 517 518 *config = pinconf_to_config_packed(param, arg); 519 520 return 0; 521 } 522 523 static int sunxi_pconf_group_get(struct pinctrl_dev *pctldev, 524 unsigned group, 525 unsigned long *config) 526 { 527 struct sunxi_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev); 528 struct sunxi_pinctrl_group *g = &pctl->groups[group]; 529 530 /* We only support 1 pin per group. Chain it to the pin callback */ 531 return sunxi_pconf_get(pctldev, g->pin, config); 532 } 533 534 static int sunxi_pconf_set(struct pinctrl_dev *pctldev, unsigned pin, 535 unsigned long *configs, unsigned num_configs) 536 { 537 struct sunxi_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev); 538 int i; 539 540 for (i = 0; i < num_configs; i++) { 541 enum pin_config_param param; 542 unsigned long flags; 543 u32 offset, shift, mask, reg; 544 u32 arg, val; 545 int ret; 546 547 param = pinconf_to_config_param(configs[i]); 548 arg = pinconf_to_config_argument(configs[i]); 549 550 ret = sunxi_pconf_reg(pin, param, &offset, &shift, &mask); 551 if (ret < 0) 552 return ret; 553 554 switch (param) { 555 case PIN_CONFIG_DRIVE_STRENGTH: 556 if (arg < 10 || arg > 40) 557 return -EINVAL; 558 /* 559 * We convert from mA to what the register expects: 560 * 0: 10mA 561 * 1: 20mA 562 * 2: 30mA 563 * 3: 40mA 564 */ 565 val = arg / 10 - 1; 566 break; 567 case PIN_CONFIG_BIAS_DISABLE: 568 val = 0; 569 break; 570 case PIN_CONFIG_BIAS_PULL_UP: 571 if (arg == 0) 572 return -EINVAL; 573 val = 1; 574 break; 575 case PIN_CONFIG_BIAS_PULL_DOWN: 576 if (arg == 0) 577 return -EINVAL; 578 val = 2; 579 break; 580 default: 581 /* sunxi_pconf_reg should catch anything unsupported */ 582 WARN_ON(1); 583 return -ENOTSUPP; 584 } 585 586 raw_spin_lock_irqsave(&pctl->lock, flags); 587 reg = readl(pctl->membase + offset); 588 reg &= ~(mask << shift); 589 writel(reg | val << shift, pctl->membase + offset); 590 raw_spin_unlock_irqrestore(&pctl->lock, flags); 591 } /* for each config */ 592 593 return 0; 594 } 595 596 static int sunxi_pconf_group_set(struct pinctrl_dev *pctldev, unsigned group, 597 unsigned long *configs, unsigned num_configs) 598 { 599 struct sunxi_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev); 600 struct sunxi_pinctrl_group *g = &pctl->groups[group]; 601 602 /* We only support 1 pin per group. Chain it to the pin callback */ 603 return sunxi_pconf_set(pctldev, g->pin, configs, num_configs); 604 } 605 606 static const struct pinconf_ops sunxi_pconf_ops = { 607 .is_generic = true, 608 .pin_config_get = sunxi_pconf_get, 609 .pin_config_set = sunxi_pconf_set, 610 .pin_config_group_get = sunxi_pconf_group_get, 611 .pin_config_group_set = sunxi_pconf_group_set, 612 }; 613 614 static int sunxi_pinctrl_set_io_bias_cfg(struct sunxi_pinctrl *pctl, 615 unsigned pin, 616 struct regulator *supply) 617 { 618 unsigned short bank = pin / PINS_PER_BANK; 619 unsigned long flags; 620 u32 val, reg; 621 int uV; 622 623 if (!pctl->desc->io_bias_cfg_variant) 624 return 0; 625 626 uV = regulator_get_voltage(supply); 627 if (uV < 0) 628 return uV; 629 630 /* Might be dummy regulator with no voltage set */ 631 if (uV == 0) 632 return 0; 633 634 switch (pctl->desc->io_bias_cfg_variant) { 635 case BIAS_VOLTAGE_GRP_CONFIG: 636 /* 637 * Configured value must be equal or greater to actual 638 * voltage. 639 */ 640 if (uV <= 1800000) 641 val = 0x0; /* 1.8V */ 642 else if (uV <= 2500000) 643 val = 0x6; /* 2.5V */ 644 else if (uV <= 2800000) 645 val = 0x9; /* 2.8V */ 646 else if (uV <= 3000000) 647 val = 0xA; /* 3.0V */ 648 else 649 val = 0xD; /* 3.3V */ 650 651 pin -= pctl->desc->pin_base; 652 653 reg = readl(pctl->membase + sunxi_grp_config_reg(pin)); 654 reg &= ~IO_BIAS_MASK; 655 writel(reg | val, pctl->membase + sunxi_grp_config_reg(pin)); 656 return 0; 657 case BIAS_VOLTAGE_PIO_POW_MODE_SEL: 658 val = uV <= 1800000 ? 1 : 0; 659 660 raw_spin_lock_irqsave(&pctl->lock, flags); 661 reg = readl(pctl->membase + PIO_POW_MOD_SEL_REG); 662 reg &= ~(1 << bank); 663 writel(reg | val << bank, pctl->membase + PIO_POW_MOD_SEL_REG); 664 raw_spin_unlock_irqrestore(&pctl->lock, flags); 665 return 0; 666 default: 667 return -EINVAL; 668 } 669 } 670 671 static int sunxi_pmx_get_funcs_cnt(struct pinctrl_dev *pctldev) 672 { 673 struct sunxi_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev); 674 675 return pctl->nfunctions; 676 } 677 678 static const char *sunxi_pmx_get_func_name(struct pinctrl_dev *pctldev, 679 unsigned function) 680 { 681 struct sunxi_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev); 682 683 return pctl->functions[function].name; 684 } 685 686 static int sunxi_pmx_get_func_groups(struct pinctrl_dev *pctldev, 687 unsigned function, 688 const char * const **groups, 689 unsigned * const num_groups) 690 { 691 struct sunxi_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev); 692 693 *groups = pctl->functions[function].groups; 694 *num_groups = pctl->functions[function].ngroups; 695 696 return 0; 697 } 698 699 static void sunxi_pmx_set(struct pinctrl_dev *pctldev, 700 unsigned pin, 701 u8 config) 702 { 703 struct sunxi_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev); 704 unsigned long flags; 705 u32 val, mask; 706 707 raw_spin_lock_irqsave(&pctl->lock, flags); 708 709 pin -= pctl->desc->pin_base; 710 val = readl(pctl->membase + sunxi_mux_reg(pin)); 711 mask = MUX_PINS_MASK << sunxi_mux_offset(pin); 712 writel((val & ~mask) | config << sunxi_mux_offset(pin), 713 pctl->membase + sunxi_mux_reg(pin)); 714 715 raw_spin_unlock_irqrestore(&pctl->lock, flags); 716 } 717 718 static int sunxi_pmx_set_mux(struct pinctrl_dev *pctldev, 719 unsigned function, 720 unsigned group) 721 { 722 struct sunxi_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev); 723 struct sunxi_pinctrl_group *g = pctl->groups + group; 724 struct sunxi_pinctrl_function *func = pctl->functions + function; 725 struct sunxi_desc_function *desc = 726 sunxi_pinctrl_desc_find_function_by_name(pctl, 727 g->name, 728 func->name); 729 730 if (!desc) 731 return -EINVAL; 732 733 sunxi_pmx_set(pctldev, g->pin, desc->muxval); 734 735 return 0; 736 } 737 738 static int 739 sunxi_pmx_gpio_set_direction(struct pinctrl_dev *pctldev, 740 struct pinctrl_gpio_range *range, 741 unsigned offset, 742 bool input) 743 { 744 struct sunxi_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev); 745 struct sunxi_desc_function *desc; 746 const char *func; 747 748 if (input) 749 func = "gpio_in"; 750 else 751 func = "gpio_out"; 752 753 desc = sunxi_pinctrl_desc_find_function_by_pin(pctl, offset, func); 754 if (!desc) 755 return -EINVAL; 756 757 sunxi_pmx_set(pctldev, offset, desc->muxval); 758 759 return 0; 760 } 761 762 static int sunxi_pmx_request(struct pinctrl_dev *pctldev, unsigned offset) 763 { 764 struct sunxi_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev); 765 unsigned short bank = offset / PINS_PER_BANK; 766 unsigned short bank_offset = bank - pctl->desc->pin_base / 767 PINS_PER_BANK; 768 struct sunxi_pinctrl_regulator *s_reg = &pctl->regulators[bank_offset]; 769 struct regulator *reg = s_reg->regulator; 770 char supply[16]; 771 int ret; 772 773 if (reg) { 774 refcount_inc(&s_reg->refcount); 775 return 0; 776 } 777 778 snprintf(supply, sizeof(supply), "vcc-p%c", 'a' + bank); 779 reg = regulator_get(pctl->dev, supply); 780 if (IS_ERR(reg)) { 781 dev_err(pctl->dev, "Couldn't get bank P%c regulator\n", 782 'A' + bank); 783 return PTR_ERR(reg); 784 } 785 786 ret = regulator_enable(reg); 787 if (ret) { 788 dev_err(pctl->dev, 789 "Couldn't enable bank P%c regulator\n", 'A' + bank); 790 goto out; 791 } 792 793 sunxi_pinctrl_set_io_bias_cfg(pctl, offset, reg); 794 795 s_reg->regulator = reg; 796 refcount_set(&s_reg->refcount, 1); 797 798 return 0; 799 800 out: 801 regulator_put(s_reg->regulator); 802 803 return ret; 804 } 805 806 static int sunxi_pmx_free(struct pinctrl_dev *pctldev, unsigned offset) 807 { 808 struct sunxi_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev); 809 unsigned short bank = offset / PINS_PER_BANK; 810 unsigned short bank_offset = bank - pctl->desc->pin_base / 811 PINS_PER_BANK; 812 struct sunxi_pinctrl_regulator *s_reg = &pctl->regulators[bank_offset]; 813 814 if (!refcount_dec_and_test(&s_reg->refcount)) 815 return 0; 816 817 regulator_disable(s_reg->regulator); 818 regulator_put(s_reg->regulator); 819 s_reg->regulator = NULL; 820 821 return 0; 822 } 823 824 static const struct pinmux_ops sunxi_pmx_ops = { 825 .get_functions_count = sunxi_pmx_get_funcs_cnt, 826 .get_function_name = sunxi_pmx_get_func_name, 827 .get_function_groups = sunxi_pmx_get_func_groups, 828 .set_mux = sunxi_pmx_set_mux, 829 .gpio_set_direction = sunxi_pmx_gpio_set_direction, 830 .request = sunxi_pmx_request, 831 .free = sunxi_pmx_free, 832 .strict = true, 833 }; 834 835 static int sunxi_pinctrl_gpio_direction_input(struct gpio_chip *chip, 836 unsigned offset) 837 { 838 struct sunxi_pinctrl *pctl = gpiochip_get_data(chip); 839 840 return sunxi_pmx_gpio_set_direction(pctl->pctl_dev, NULL, offset, true); 841 } 842 843 static int sunxi_pinctrl_gpio_get(struct gpio_chip *chip, unsigned offset) 844 { 845 struct sunxi_pinctrl *pctl = gpiochip_get_data(chip); 846 u32 reg = sunxi_data_reg(offset); 847 u8 index = sunxi_data_offset(offset); 848 bool set_mux = pctl->desc->irq_read_needs_mux && 849 gpiochip_line_is_irq(chip, offset); 850 u32 pin = offset + chip->base; 851 u32 val; 852 853 if (set_mux) 854 sunxi_pmx_set(pctl->pctl_dev, pin, SUN4I_FUNC_INPUT); 855 856 val = (readl(pctl->membase + reg) >> index) & DATA_PINS_MASK; 857 858 if (set_mux) 859 sunxi_pmx_set(pctl->pctl_dev, pin, SUN4I_FUNC_IRQ); 860 861 return !!val; 862 } 863 864 static void sunxi_pinctrl_gpio_set(struct gpio_chip *chip, 865 unsigned offset, int value) 866 { 867 struct sunxi_pinctrl *pctl = gpiochip_get_data(chip); 868 u32 reg = sunxi_data_reg(offset); 869 u8 index = sunxi_data_offset(offset); 870 unsigned long flags; 871 u32 regval; 872 873 raw_spin_lock_irqsave(&pctl->lock, flags); 874 875 regval = readl(pctl->membase + reg); 876 877 if (value) 878 regval |= BIT(index); 879 else 880 regval &= ~(BIT(index)); 881 882 writel(regval, pctl->membase + reg); 883 884 raw_spin_unlock_irqrestore(&pctl->lock, flags); 885 } 886 887 static int sunxi_pinctrl_gpio_direction_output(struct gpio_chip *chip, 888 unsigned offset, int value) 889 { 890 struct sunxi_pinctrl *pctl = gpiochip_get_data(chip); 891 892 sunxi_pinctrl_gpio_set(chip, offset, value); 893 return sunxi_pmx_gpio_set_direction(pctl->pctl_dev, NULL, offset, false); 894 } 895 896 static int sunxi_pinctrl_gpio_of_xlate(struct gpio_chip *gc, 897 const struct of_phandle_args *gpiospec, 898 u32 *flags) 899 { 900 int pin, base; 901 902 base = PINS_PER_BANK * gpiospec->args[0]; 903 pin = base + gpiospec->args[1]; 904 905 if (pin > gc->ngpio) 906 return -EINVAL; 907 908 if (flags) 909 *flags = gpiospec->args[2]; 910 911 return pin; 912 } 913 914 static int sunxi_pinctrl_gpio_to_irq(struct gpio_chip *chip, unsigned offset) 915 { 916 struct sunxi_pinctrl *pctl = gpiochip_get_data(chip); 917 struct sunxi_desc_function *desc; 918 unsigned pinnum = pctl->desc->pin_base + offset; 919 unsigned irqnum; 920 921 if (offset >= chip->ngpio) 922 return -ENXIO; 923 924 desc = sunxi_pinctrl_desc_find_function_by_pin(pctl, pinnum, "irq"); 925 if (!desc) 926 return -EINVAL; 927 928 irqnum = desc->irqbank * IRQ_PER_BANK + desc->irqnum; 929 930 dev_dbg(chip->parent, "%s: request IRQ for GPIO %d, return %d\n", 931 chip->label, offset + chip->base, irqnum); 932 933 return irq_find_mapping(pctl->domain, irqnum); 934 } 935 936 static int sunxi_pinctrl_irq_request_resources(struct irq_data *d) 937 { 938 struct sunxi_pinctrl *pctl = irq_data_get_irq_chip_data(d); 939 struct sunxi_desc_function *func; 940 int ret; 941 942 func = sunxi_pinctrl_desc_find_function_by_pin(pctl, 943 pctl->irq_array[d->hwirq], "irq"); 944 if (!func) 945 return -EINVAL; 946 947 ret = gpiochip_lock_as_irq(pctl->chip, 948 pctl->irq_array[d->hwirq] - pctl->desc->pin_base); 949 if (ret) { 950 dev_err(pctl->dev, "unable to lock HW IRQ %lu for IRQ\n", 951 irqd_to_hwirq(d)); 952 return ret; 953 } 954 955 /* Change muxing to INT mode */ 956 sunxi_pmx_set(pctl->pctl_dev, pctl->irq_array[d->hwirq], func->muxval); 957 958 return 0; 959 } 960 961 static void sunxi_pinctrl_irq_release_resources(struct irq_data *d) 962 { 963 struct sunxi_pinctrl *pctl = irq_data_get_irq_chip_data(d); 964 965 gpiochip_unlock_as_irq(pctl->chip, 966 pctl->irq_array[d->hwirq] - pctl->desc->pin_base); 967 } 968 969 static int sunxi_pinctrl_irq_set_type(struct irq_data *d, unsigned int type) 970 { 971 struct sunxi_pinctrl *pctl = irq_data_get_irq_chip_data(d); 972 u32 reg = sunxi_irq_cfg_reg(pctl->desc, d->hwirq); 973 u8 index = sunxi_irq_cfg_offset(d->hwirq); 974 unsigned long flags; 975 u32 regval; 976 u8 mode; 977 978 switch (type) { 979 case IRQ_TYPE_EDGE_RISING: 980 mode = IRQ_EDGE_RISING; 981 break; 982 case IRQ_TYPE_EDGE_FALLING: 983 mode = IRQ_EDGE_FALLING; 984 break; 985 case IRQ_TYPE_EDGE_BOTH: 986 mode = IRQ_EDGE_BOTH; 987 break; 988 case IRQ_TYPE_LEVEL_HIGH: 989 mode = IRQ_LEVEL_HIGH; 990 break; 991 case IRQ_TYPE_LEVEL_LOW: 992 mode = IRQ_LEVEL_LOW; 993 break; 994 default: 995 return -EINVAL; 996 } 997 998 raw_spin_lock_irqsave(&pctl->lock, flags); 999 1000 if (type & IRQ_TYPE_LEVEL_MASK) 1001 irq_set_chip_handler_name_locked(d, &sunxi_pinctrl_level_irq_chip, 1002 handle_fasteoi_irq, NULL); 1003 else 1004 irq_set_chip_handler_name_locked(d, &sunxi_pinctrl_edge_irq_chip, 1005 handle_edge_irq, NULL); 1006 1007 regval = readl(pctl->membase + reg); 1008 regval &= ~(IRQ_CFG_IRQ_MASK << index); 1009 writel(regval | (mode << index), pctl->membase + reg); 1010 1011 raw_spin_unlock_irqrestore(&pctl->lock, flags); 1012 1013 return 0; 1014 } 1015 1016 static void sunxi_pinctrl_irq_ack(struct irq_data *d) 1017 { 1018 struct sunxi_pinctrl *pctl = irq_data_get_irq_chip_data(d); 1019 u32 status_reg = sunxi_irq_status_reg(pctl->desc, d->hwirq); 1020 u8 status_idx = sunxi_irq_status_offset(d->hwirq); 1021 1022 /* Clear the IRQ */ 1023 writel(1 << status_idx, pctl->membase + status_reg); 1024 } 1025 1026 static void sunxi_pinctrl_irq_mask(struct irq_data *d) 1027 { 1028 struct sunxi_pinctrl *pctl = irq_data_get_irq_chip_data(d); 1029 u32 reg = sunxi_irq_ctrl_reg(pctl->desc, d->hwirq); 1030 u8 idx = sunxi_irq_ctrl_offset(d->hwirq); 1031 unsigned long flags; 1032 u32 val; 1033 1034 raw_spin_lock_irqsave(&pctl->lock, flags); 1035 1036 /* Mask the IRQ */ 1037 val = readl(pctl->membase + reg); 1038 writel(val & ~(1 << idx), pctl->membase + reg); 1039 1040 raw_spin_unlock_irqrestore(&pctl->lock, flags); 1041 } 1042 1043 static void sunxi_pinctrl_irq_unmask(struct irq_data *d) 1044 { 1045 struct sunxi_pinctrl *pctl = irq_data_get_irq_chip_data(d); 1046 u32 reg = sunxi_irq_ctrl_reg(pctl->desc, d->hwirq); 1047 u8 idx = sunxi_irq_ctrl_offset(d->hwirq); 1048 unsigned long flags; 1049 u32 val; 1050 1051 raw_spin_lock_irqsave(&pctl->lock, flags); 1052 1053 /* Unmask the IRQ */ 1054 val = readl(pctl->membase + reg); 1055 writel(val | (1 << idx), pctl->membase + reg); 1056 1057 raw_spin_unlock_irqrestore(&pctl->lock, flags); 1058 } 1059 1060 static void sunxi_pinctrl_irq_ack_unmask(struct irq_data *d) 1061 { 1062 sunxi_pinctrl_irq_ack(d); 1063 sunxi_pinctrl_irq_unmask(d); 1064 } 1065 1066 static int sunxi_pinctrl_irq_set_wake(struct irq_data *d, unsigned int on) 1067 { 1068 struct sunxi_pinctrl *pctl = irq_data_get_irq_chip_data(d); 1069 u8 bank = d->hwirq / IRQ_PER_BANK; 1070 1071 return irq_set_irq_wake(pctl->irq[bank], on); 1072 } 1073 1074 static struct irq_chip sunxi_pinctrl_edge_irq_chip = { 1075 .name = "sunxi_pio_edge", 1076 .irq_ack = sunxi_pinctrl_irq_ack, 1077 .irq_mask = sunxi_pinctrl_irq_mask, 1078 .irq_unmask = sunxi_pinctrl_irq_unmask, 1079 .irq_request_resources = sunxi_pinctrl_irq_request_resources, 1080 .irq_release_resources = sunxi_pinctrl_irq_release_resources, 1081 .irq_set_type = sunxi_pinctrl_irq_set_type, 1082 .irq_set_wake = sunxi_pinctrl_irq_set_wake, 1083 .flags = IRQCHIP_MASK_ON_SUSPEND, 1084 }; 1085 1086 static struct irq_chip sunxi_pinctrl_level_irq_chip = { 1087 .name = "sunxi_pio_level", 1088 .irq_eoi = sunxi_pinctrl_irq_ack, 1089 .irq_mask = sunxi_pinctrl_irq_mask, 1090 .irq_unmask = sunxi_pinctrl_irq_unmask, 1091 /* Define irq_enable / disable to avoid spurious irqs for drivers 1092 * using these to suppress irqs while they clear the irq source */ 1093 .irq_enable = sunxi_pinctrl_irq_ack_unmask, 1094 .irq_disable = sunxi_pinctrl_irq_mask, 1095 .irq_request_resources = sunxi_pinctrl_irq_request_resources, 1096 .irq_release_resources = sunxi_pinctrl_irq_release_resources, 1097 .irq_set_type = sunxi_pinctrl_irq_set_type, 1098 .irq_set_wake = sunxi_pinctrl_irq_set_wake, 1099 .flags = IRQCHIP_EOI_THREADED | 1100 IRQCHIP_MASK_ON_SUSPEND | 1101 IRQCHIP_EOI_IF_HANDLED, 1102 }; 1103 1104 static int sunxi_pinctrl_irq_of_xlate(struct irq_domain *d, 1105 struct device_node *node, 1106 const u32 *intspec, 1107 unsigned int intsize, 1108 unsigned long *out_hwirq, 1109 unsigned int *out_type) 1110 { 1111 struct sunxi_pinctrl *pctl = d->host_data; 1112 struct sunxi_desc_function *desc; 1113 int pin, base; 1114 1115 if (intsize < 3) 1116 return -EINVAL; 1117 1118 base = PINS_PER_BANK * intspec[0]; 1119 pin = pctl->desc->pin_base + base + intspec[1]; 1120 1121 desc = sunxi_pinctrl_desc_find_function_by_pin(pctl, pin, "irq"); 1122 if (!desc) 1123 return -EINVAL; 1124 1125 *out_hwirq = desc->irqbank * PINS_PER_BANK + desc->irqnum; 1126 *out_type = intspec[2]; 1127 1128 return 0; 1129 } 1130 1131 static const struct irq_domain_ops sunxi_pinctrl_irq_domain_ops = { 1132 .xlate = sunxi_pinctrl_irq_of_xlate, 1133 }; 1134 1135 static void sunxi_pinctrl_irq_handler(struct irq_desc *desc) 1136 { 1137 unsigned int irq = irq_desc_get_irq(desc); 1138 struct irq_chip *chip = irq_desc_get_chip(desc); 1139 struct sunxi_pinctrl *pctl = irq_desc_get_handler_data(desc); 1140 unsigned long bank, reg, val; 1141 1142 for (bank = 0; bank < pctl->desc->irq_banks; bank++) 1143 if (irq == pctl->irq[bank]) 1144 break; 1145 1146 WARN_ON(bank == pctl->desc->irq_banks); 1147 1148 chained_irq_enter(chip, desc); 1149 1150 reg = sunxi_irq_status_reg_from_bank(pctl->desc, bank); 1151 val = readl(pctl->membase + reg); 1152 1153 if (val) { 1154 int irqoffset; 1155 1156 for_each_set_bit(irqoffset, &val, IRQ_PER_BANK) 1157 generic_handle_domain_irq(pctl->domain, 1158 bank * IRQ_PER_BANK + irqoffset); 1159 } 1160 1161 chained_irq_exit(chip, desc); 1162 } 1163 1164 static int sunxi_pinctrl_add_function(struct sunxi_pinctrl *pctl, 1165 const char *name) 1166 { 1167 struct sunxi_pinctrl_function *func = pctl->functions; 1168 1169 while (func->name) { 1170 /* function already there */ 1171 if (strcmp(func->name, name) == 0) { 1172 func->ngroups++; 1173 return -EEXIST; 1174 } 1175 func++; 1176 } 1177 1178 func->name = name; 1179 func->ngroups = 1; 1180 1181 pctl->nfunctions++; 1182 1183 return 0; 1184 } 1185 1186 static int sunxi_pinctrl_build_state(struct platform_device *pdev) 1187 { 1188 struct sunxi_pinctrl *pctl = platform_get_drvdata(pdev); 1189 void *ptr; 1190 int i; 1191 1192 /* 1193 * Allocate groups 1194 * 1195 * We assume that the number of groups is the number of pins 1196 * given in the data array. 1197 1198 * This will not always be true, since some pins might not be 1199 * available in the current variant, but fortunately for us, 1200 * this means that the number of pins is the maximum group 1201 * number we will ever see. 1202 */ 1203 pctl->groups = devm_kcalloc(&pdev->dev, 1204 pctl->desc->npins, sizeof(*pctl->groups), 1205 GFP_KERNEL); 1206 if (!pctl->groups) 1207 return -ENOMEM; 1208 1209 for (i = 0; i < pctl->desc->npins; i++) { 1210 const struct sunxi_desc_pin *pin = pctl->desc->pins + i; 1211 struct sunxi_pinctrl_group *group = pctl->groups + pctl->ngroups; 1212 1213 if (pin->variant && !(pctl->variant & pin->variant)) 1214 continue; 1215 1216 group->name = pin->pin.name; 1217 group->pin = pin->pin.number; 1218 1219 /* And now we count the actual number of pins / groups */ 1220 pctl->ngroups++; 1221 } 1222 1223 /* 1224 * Find an upper bound for the maximum number of functions: in 1225 * the worst case we have gpio_in, gpio_out, irq and up to four 1226 * special functions per pin, plus one entry for the sentinel. 1227 * We'll reallocate that later anyway. 1228 */ 1229 pctl->functions = kcalloc(4 * pctl->ngroups + 4, 1230 sizeof(*pctl->functions), 1231 GFP_KERNEL); 1232 if (!pctl->functions) 1233 return -ENOMEM; 1234 1235 /* Count functions and their associated groups */ 1236 for (i = 0; i < pctl->desc->npins; i++) { 1237 const struct sunxi_desc_pin *pin = pctl->desc->pins + i; 1238 struct sunxi_desc_function *func; 1239 1240 if (pin->variant && !(pctl->variant & pin->variant)) 1241 continue; 1242 1243 for (func = pin->functions; func->name; func++) { 1244 if (func->variant && !(pctl->variant & func->variant)) 1245 continue; 1246 1247 /* Create interrupt mapping while we're at it */ 1248 if (!strcmp(func->name, "irq")) { 1249 int irqnum = func->irqnum + func->irqbank * IRQ_PER_BANK; 1250 pctl->irq_array[irqnum] = pin->pin.number; 1251 } 1252 1253 sunxi_pinctrl_add_function(pctl, func->name); 1254 } 1255 } 1256 1257 /* And now allocated and fill the array for real */ 1258 ptr = krealloc(pctl->functions, 1259 pctl->nfunctions * sizeof(*pctl->functions), 1260 GFP_KERNEL); 1261 if (!ptr) { 1262 kfree(pctl->functions); 1263 pctl->functions = NULL; 1264 return -ENOMEM; 1265 } 1266 pctl->functions = ptr; 1267 1268 for (i = 0; i < pctl->desc->npins; i++) { 1269 const struct sunxi_desc_pin *pin = pctl->desc->pins + i; 1270 struct sunxi_desc_function *func; 1271 1272 if (pin->variant && !(pctl->variant & pin->variant)) 1273 continue; 1274 1275 for (func = pin->functions; func->name; func++) { 1276 struct sunxi_pinctrl_function *func_item; 1277 const char **func_grp; 1278 1279 if (func->variant && !(pctl->variant & func->variant)) 1280 continue; 1281 1282 func_item = sunxi_pinctrl_find_function_by_name(pctl, 1283 func->name); 1284 if (!func_item) { 1285 kfree(pctl->functions); 1286 return -EINVAL; 1287 } 1288 1289 if (!func_item->groups) { 1290 func_item->groups = 1291 devm_kcalloc(&pdev->dev, 1292 func_item->ngroups, 1293 sizeof(*func_item->groups), 1294 GFP_KERNEL); 1295 if (!func_item->groups) { 1296 kfree(pctl->functions); 1297 return -ENOMEM; 1298 } 1299 } 1300 1301 func_grp = func_item->groups; 1302 while (*func_grp) 1303 func_grp++; 1304 1305 *func_grp = pin->pin.name; 1306 } 1307 } 1308 1309 return 0; 1310 } 1311 1312 static int sunxi_pinctrl_get_debounce_div(struct clk *clk, int freq, int *diff) 1313 { 1314 unsigned long clock = clk_get_rate(clk); 1315 unsigned int best_diff, best_div; 1316 int i; 1317 1318 best_diff = abs(freq - clock); 1319 best_div = 0; 1320 1321 for (i = 1; i < 8; i++) { 1322 int cur_diff = abs(freq - (clock >> i)); 1323 1324 if (cur_diff < best_diff) { 1325 best_diff = cur_diff; 1326 best_div = i; 1327 } 1328 } 1329 1330 *diff = best_diff; 1331 return best_div; 1332 } 1333 1334 static int sunxi_pinctrl_setup_debounce(struct sunxi_pinctrl *pctl, 1335 struct device_node *node) 1336 { 1337 unsigned int hosc_diff, losc_diff; 1338 unsigned int hosc_div, losc_div; 1339 struct clk *hosc, *losc; 1340 u8 div, src; 1341 int i, ret; 1342 1343 /* Deal with old DTs that didn't have the oscillators */ 1344 if (of_clk_get_parent_count(node) != 3) 1345 return 0; 1346 1347 /* If we don't have any setup, bail out */ 1348 if (!of_find_property(node, "input-debounce", NULL)) 1349 return 0; 1350 1351 losc = devm_clk_get(pctl->dev, "losc"); 1352 if (IS_ERR(losc)) 1353 return PTR_ERR(losc); 1354 1355 hosc = devm_clk_get(pctl->dev, "hosc"); 1356 if (IS_ERR(hosc)) 1357 return PTR_ERR(hosc); 1358 1359 for (i = 0; i < pctl->desc->irq_banks; i++) { 1360 unsigned long debounce_freq; 1361 u32 debounce; 1362 1363 ret = of_property_read_u32_index(node, "input-debounce", 1364 i, &debounce); 1365 if (ret) 1366 return ret; 1367 1368 if (!debounce) 1369 continue; 1370 1371 debounce_freq = DIV_ROUND_CLOSEST(USEC_PER_SEC, debounce); 1372 losc_div = sunxi_pinctrl_get_debounce_div(losc, 1373 debounce_freq, 1374 &losc_diff); 1375 1376 hosc_div = sunxi_pinctrl_get_debounce_div(hosc, 1377 debounce_freq, 1378 &hosc_diff); 1379 1380 if (hosc_diff < losc_diff) { 1381 div = hosc_div; 1382 src = 1; 1383 } else { 1384 div = losc_div; 1385 src = 0; 1386 } 1387 1388 writel(src | div << 4, 1389 pctl->membase + 1390 sunxi_irq_debounce_reg_from_bank(pctl->desc, i)); 1391 } 1392 1393 return 0; 1394 } 1395 1396 int sunxi_pinctrl_init_with_variant(struct platform_device *pdev, 1397 const struct sunxi_pinctrl_desc *desc, 1398 unsigned long variant) 1399 { 1400 struct device_node *node = pdev->dev.of_node; 1401 struct pinctrl_desc *pctrl_desc; 1402 struct pinctrl_pin_desc *pins; 1403 struct sunxi_pinctrl *pctl; 1404 struct pinmux_ops *pmxops; 1405 int i, ret, last_pin, pin_idx; 1406 struct clk *clk; 1407 1408 pctl = devm_kzalloc(&pdev->dev, sizeof(*pctl), GFP_KERNEL); 1409 if (!pctl) 1410 return -ENOMEM; 1411 platform_set_drvdata(pdev, pctl); 1412 1413 raw_spin_lock_init(&pctl->lock); 1414 1415 pctl->membase = devm_platform_ioremap_resource(pdev, 0); 1416 if (IS_ERR(pctl->membase)) 1417 return PTR_ERR(pctl->membase); 1418 1419 pctl->dev = &pdev->dev; 1420 pctl->desc = desc; 1421 pctl->variant = variant; 1422 1423 pctl->irq_array = devm_kcalloc(&pdev->dev, 1424 IRQ_PER_BANK * pctl->desc->irq_banks, 1425 sizeof(*pctl->irq_array), 1426 GFP_KERNEL); 1427 if (!pctl->irq_array) 1428 return -ENOMEM; 1429 1430 ret = sunxi_pinctrl_build_state(pdev); 1431 if (ret) { 1432 dev_err(&pdev->dev, "dt probe failed: %d\n", ret); 1433 return ret; 1434 } 1435 1436 pins = devm_kcalloc(&pdev->dev, 1437 pctl->desc->npins, sizeof(*pins), 1438 GFP_KERNEL); 1439 if (!pins) 1440 return -ENOMEM; 1441 1442 for (i = 0, pin_idx = 0; i < pctl->desc->npins; i++) { 1443 const struct sunxi_desc_pin *pin = pctl->desc->pins + i; 1444 1445 if (pin->variant && !(pctl->variant & pin->variant)) 1446 continue; 1447 1448 pins[pin_idx++] = pin->pin; 1449 } 1450 1451 pctrl_desc = devm_kzalloc(&pdev->dev, 1452 sizeof(*pctrl_desc), 1453 GFP_KERNEL); 1454 if (!pctrl_desc) 1455 return -ENOMEM; 1456 1457 pctrl_desc->name = dev_name(&pdev->dev); 1458 pctrl_desc->owner = THIS_MODULE; 1459 pctrl_desc->pins = pins; 1460 pctrl_desc->npins = pctl->ngroups; 1461 pctrl_desc->confops = &sunxi_pconf_ops; 1462 pctrl_desc->pctlops = &sunxi_pctrl_ops; 1463 1464 pmxops = devm_kmemdup(&pdev->dev, &sunxi_pmx_ops, sizeof(sunxi_pmx_ops), 1465 GFP_KERNEL); 1466 if (!pmxops) 1467 return -ENOMEM; 1468 1469 if (desc->disable_strict_mode) 1470 pmxops->strict = false; 1471 1472 pctrl_desc->pmxops = pmxops; 1473 1474 pctl->pctl_dev = devm_pinctrl_register(&pdev->dev, pctrl_desc, pctl); 1475 if (IS_ERR(pctl->pctl_dev)) { 1476 dev_err(&pdev->dev, "couldn't register pinctrl driver\n"); 1477 return PTR_ERR(pctl->pctl_dev); 1478 } 1479 1480 pctl->chip = devm_kzalloc(&pdev->dev, sizeof(*pctl->chip), GFP_KERNEL); 1481 if (!pctl->chip) 1482 return -ENOMEM; 1483 1484 last_pin = pctl->desc->pins[pctl->desc->npins - 1].pin.number; 1485 pctl->chip->owner = THIS_MODULE; 1486 pctl->chip->request = gpiochip_generic_request; 1487 pctl->chip->free = gpiochip_generic_free; 1488 pctl->chip->set_config = gpiochip_generic_config; 1489 pctl->chip->direction_input = sunxi_pinctrl_gpio_direction_input; 1490 pctl->chip->direction_output = sunxi_pinctrl_gpio_direction_output; 1491 pctl->chip->get = sunxi_pinctrl_gpio_get; 1492 pctl->chip->set = sunxi_pinctrl_gpio_set; 1493 pctl->chip->of_xlate = sunxi_pinctrl_gpio_of_xlate; 1494 pctl->chip->to_irq = sunxi_pinctrl_gpio_to_irq; 1495 pctl->chip->of_gpio_n_cells = 3; 1496 pctl->chip->can_sleep = false; 1497 pctl->chip->ngpio = round_up(last_pin, PINS_PER_BANK) - 1498 pctl->desc->pin_base; 1499 pctl->chip->label = dev_name(&pdev->dev); 1500 pctl->chip->parent = &pdev->dev; 1501 pctl->chip->base = pctl->desc->pin_base; 1502 1503 ret = gpiochip_add_data(pctl->chip, pctl); 1504 if (ret) 1505 return ret; 1506 1507 for (i = 0; i < pctl->desc->npins; i++) { 1508 const struct sunxi_desc_pin *pin = pctl->desc->pins + i; 1509 1510 ret = gpiochip_add_pin_range(pctl->chip, dev_name(&pdev->dev), 1511 pin->pin.number - pctl->desc->pin_base, 1512 pin->pin.number, 1); 1513 if (ret) 1514 goto gpiochip_error; 1515 } 1516 1517 ret = of_clk_get_parent_count(node); 1518 clk = devm_clk_get(&pdev->dev, ret == 1 ? NULL : "apb"); 1519 if (IS_ERR(clk)) { 1520 ret = PTR_ERR(clk); 1521 goto gpiochip_error; 1522 } 1523 1524 ret = clk_prepare_enable(clk); 1525 if (ret) 1526 goto gpiochip_error; 1527 1528 pctl->irq = devm_kcalloc(&pdev->dev, 1529 pctl->desc->irq_banks, 1530 sizeof(*pctl->irq), 1531 GFP_KERNEL); 1532 if (!pctl->irq) { 1533 ret = -ENOMEM; 1534 goto clk_error; 1535 } 1536 1537 for (i = 0; i < pctl->desc->irq_banks; i++) { 1538 pctl->irq[i] = platform_get_irq(pdev, i); 1539 if (pctl->irq[i] < 0) { 1540 ret = pctl->irq[i]; 1541 goto clk_error; 1542 } 1543 } 1544 1545 pctl->domain = irq_domain_add_linear(node, 1546 pctl->desc->irq_banks * IRQ_PER_BANK, 1547 &sunxi_pinctrl_irq_domain_ops, 1548 pctl); 1549 if (!pctl->domain) { 1550 dev_err(&pdev->dev, "Couldn't register IRQ domain\n"); 1551 ret = -ENOMEM; 1552 goto clk_error; 1553 } 1554 1555 for (i = 0; i < (pctl->desc->irq_banks * IRQ_PER_BANK); i++) { 1556 int irqno = irq_create_mapping(pctl->domain, i); 1557 1558 irq_set_chip_and_handler(irqno, &sunxi_pinctrl_edge_irq_chip, 1559 handle_edge_irq); 1560 irq_set_chip_data(irqno, pctl); 1561 } 1562 1563 for (i = 0; i < pctl->desc->irq_banks; i++) { 1564 /* Mask and clear all IRQs before registering a handler */ 1565 writel(0, pctl->membase + 1566 sunxi_irq_ctrl_reg_from_bank(pctl->desc, i)); 1567 writel(0xffffffff, 1568 pctl->membase + 1569 sunxi_irq_status_reg_from_bank(pctl->desc, i)); 1570 1571 irq_set_chained_handler_and_data(pctl->irq[i], 1572 sunxi_pinctrl_irq_handler, 1573 pctl); 1574 } 1575 1576 sunxi_pinctrl_setup_debounce(pctl, node); 1577 1578 dev_info(&pdev->dev, "initialized sunXi PIO driver\n"); 1579 1580 return 0; 1581 1582 clk_error: 1583 clk_disable_unprepare(clk); 1584 gpiochip_error: 1585 gpiochip_remove(pctl->chip); 1586 return ret; 1587 } 1588