1 // SPDX-License-Identifier: GPL-2.0+ 2 // 3 // Exynos specific support for Samsung pinctrl/gpiolib driver with eint support. 4 // 5 // Copyright (c) 2012 Samsung Electronics Co., Ltd. 6 // http://www.samsung.com 7 // Copyright (c) 2012 Linaro Ltd 8 // http://www.linaro.org 9 // 10 // Author: Thomas Abraham <thomas.ab@samsung.com> 11 // 12 // This file contains the Samsung Exynos specific information required by the 13 // the Samsung pinctrl/gpiolib driver. It also includes the implementation of 14 // external gpio and wakeup interrupt support. 15 16 #include <linux/device.h> 17 #include <linux/interrupt.h> 18 #include <linux/irqdomain.h> 19 #include <linux/irq.h> 20 #include <linux/irqchip/chained_irq.h> 21 #include <linux/of.h> 22 #include <linux/of_irq.h> 23 #include <linux/slab.h> 24 #include <linux/spinlock.h> 25 #include <linux/regmap.h> 26 #include <linux/err.h> 27 #include <linux/soc/samsung/exynos-pmu.h> 28 #include <linux/soc/samsung/exynos-regs-pmu.h> 29 30 #include <dt-bindings/pinctrl/samsung.h> 31 32 #include "pinctrl-samsung.h" 33 #include "pinctrl-exynos.h" 34 35 struct exynos_irq_chip { 36 struct irq_chip chip; 37 38 u32 eint_con; 39 u32 eint_mask; 40 u32 eint_pend; 41 u32 *eint_wake_mask_value; 42 u32 eint_wake_mask_reg; 43 void (*set_eint_wakeup_mask)(struct samsung_pinctrl_drv_data *drvdata, 44 struct exynos_irq_chip *irq_chip); 45 }; 46 47 static inline struct exynos_irq_chip *to_exynos_irq_chip(struct irq_chip *chip) 48 { 49 return container_of(chip, struct exynos_irq_chip, chip); 50 } 51 52 static void exynos_irq_mask(struct irq_data *irqd) 53 { 54 struct irq_chip *chip = irq_data_get_irq_chip(irqd); 55 struct exynos_irq_chip *our_chip = to_exynos_irq_chip(chip); 56 struct samsung_pin_bank *bank = irq_data_get_irq_chip_data(irqd); 57 unsigned long reg_mask = our_chip->eint_mask + bank->eint_offset; 58 unsigned int mask; 59 unsigned long flags; 60 61 raw_spin_lock_irqsave(&bank->slock, flags); 62 63 mask = readl(bank->eint_base + reg_mask); 64 mask |= 1 << irqd->hwirq; 65 writel(mask, bank->eint_base + reg_mask); 66 67 raw_spin_unlock_irqrestore(&bank->slock, flags); 68 } 69 70 static void exynos_irq_ack(struct irq_data *irqd) 71 { 72 struct irq_chip *chip = irq_data_get_irq_chip(irqd); 73 struct exynos_irq_chip *our_chip = to_exynos_irq_chip(chip); 74 struct samsung_pin_bank *bank = irq_data_get_irq_chip_data(irqd); 75 unsigned long reg_pend = our_chip->eint_pend + bank->eint_offset; 76 77 writel(1 << irqd->hwirq, bank->eint_base + reg_pend); 78 } 79 80 static void exynos_irq_unmask(struct irq_data *irqd) 81 { 82 struct irq_chip *chip = irq_data_get_irq_chip(irqd); 83 struct exynos_irq_chip *our_chip = to_exynos_irq_chip(chip); 84 struct samsung_pin_bank *bank = irq_data_get_irq_chip_data(irqd); 85 unsigned long reg_mask = our_chip->eint_mask + bank->eint_offset; 86 unsigned int mask; 87 unsigned long flags; 88 89 /* 90 * Ack level interrupts right before unmask 91 * 92 * If we don't do this we'll get a double-interrupt. Level triggered 93 * interrupts must not fire an interrupt if the level is not 94 * _currently_ active, even if it was active while the interrupt was 95 * masked. 96 */ 97 if (irqd_get_trigger_type(irqd) & IRQ_TYPE_LEVEL_MASK) 98 exynos_irq_ack(irqd); 99 100 raw_spin_lock_irqsave(&bank->slock, flags); 101 102 mask = readl(bank->eint_base + reg_mask); 103 mask &= ~(1 << irqd->hwirq); 104 writel(mask, bank->eint_base + reg_mask); 105 106 raw_spin_unlock_irqrestore(&bank->slock, flags); 107 } 108 109 static int exynos_irq_set_type(struct irq_data *irqd, unsigned int type) 110 { 111 struct irq_chip *chip = irq_data_get_irq_chip(irqd); 112 struct exynos_irq_chip *our_chip = to_exynos_irq_chip(chip); 113 struct samsung_pin_bank *bank = irq_data_get_irq_chip_data(irqd); 114 unsigned int shift = EXYNOS_EINT_CON_LEN * irqd->hwirq; 115 unsigned int con, trig_type; 116 unsigned long reg_con = our_chip->eint_con + bank->eint_offset; 117 118 switch (type) { 119 case IRQ_TYPE_EDGE_RISING: 120 trig_type = EXYNOS_EINT_EDGE_RISING; 121 break; 122 case IRQ_TYPE_EDGE_FALLING: 123 trig_type = EXYNOS_EINT_EDGE_FALLING; 124 break; 125 case IRQ_TYPE_EDGE_BOTH: 126 trig_type = EXYNOS_EINT_EDGE_BOTH; 127 break; 128 case IRQ_TYPE_LEVEL_HIGH: 129 trig_type = EXYNOS_EINT_LEVEL_HIGH; 130 break; 131 case IRQ_TYPE_LEVEL_LOW: 132 trig_type = EXYNOS_EINT_LEVEL_LOW; 133 break; 134 default: 135 pr_err("unsupported external interrupt type\n"); 136 return -EINVAL; 137 } 138 139 if (type & IRQ_TYPE_EDGE_BOTH) 140 irq_set_handler_locked(irqd, handle_edge_irq); 141 else 142 irq_set_handler_locked(irqd, handle_level_irq); 143 144 con = readl(bank->eint_base + reg_con); 145 con &= ~(EXYNOS_EINT_CON_MASK << shift); 146 con |= trig_type << shift; 147 writel(con, bank->eint_base + reg_con); 148 149 return 0; 150 } 151 152 static int exynos_irq_request_resources(struct irq_data *irqd) 153 { 154 struct samsung_pin_bank *bank = irq_data_get_irq_chip_data(irqd); 155 const struct samsung_pin_bank_type *bank_type = bank->type; 156 unsigned long reg_con, flags; 157 unsigned int shift, mask, con; 158 int ret; 159 160 ret = gpiochip_lock_as_irq(&bank->gpio_chip, irqd->hwirq); 161 if (ret) { 162 dev_err(bank->gpio_chip.parent, 163 "unable to lock pin %s-%lu IRQ\n", 164 bank->name, irqd->hwirq); 165 return ret; 166 } 167 168 reg_con = bank->pctl_offset + bank_type->reg_offset[PINCFG_TYPE_FUNC]; 169 shift = irqd->hwirq * bank_type->fld_width[PINCFG_TYPE_FUNC]; 170 mask = (1 << bank_type->fld_width[PINCFG_TYPE_FUNC]) - 1; 171 172 raw_spin_lock_irqsave(&bank->slock, flags); 173 174 con = readl(bank->pctl_base + reg_con); 175 con &= ~(mask << shift); 176 con |= EXYNOS_PIN_FUNC_EINT << shift; 177 writel(con, bank->pctl_base + reg_con); 178 179 raw_spin_unlock_irqrestore(&bank->slock, flags); 180 181 return 0; 182 } 183 184 static void exynos_irq_release_resources(struct irq_data *irqd) 185 { 186 struct samsung_pin_bank *bank = irq_data_get_irq_chip_data(irqd); 187 const struct samsung_pin_bank_type *bank_type = bank->type; 188 unsigned long reg_con, flags; 189 unsigned int shift, mask, con; 190 191 reg_con = bank->pctl_offset + bank_type->reg_offset[PINCFG_TYPE_FUNC]; 192 shift = irqd->hwirq * bank_type->fld_width[PINCFG_TYPE_FUNC]; 193 mask = (1 << bank_type->fld_width[PINCFG_TYPE_FUNC]) - 1; 194 195 raw_spin_lock_irqsave(&bank->slock, flags); 196 197 con = readl(bank->pctl_base + reg_con); 198 con &= ~(mask << shift); 199 con |= EXYNOS_PIN_FUNC_INPUT << shift; 200 writel(con, bank->pctl_base + reg_con); 201 202 raw_spin_unlock_irqrestore(&bank->slock, flags); 203 204 gpiochip_unlock_as_irq(&bank->gpio_chip, irqd->hwirq); 205 } 206 207 /* 208 * irq_chip for gpio interrupts. 209 */ 210 static const struct exynos_irq_chip exynos_gpio_irq_chip __initconst = { 211 .chip = { 212 .name = "exynos_gpio_irq_chip", 213 .irq_unmask = exynos_irq_unmask, 214 .irq_mask = exynos_irq_mask, 215 .irq_ack = exynos_irq_ack, 216 .irq_set_type = exynos_irq_set_type, 217 .irq_request_resources = exynos_irq_request_resources, 218 .irq_release_resources = exynos_irq_release_resources, 219 }, 220 .eint_con = EXYNOS_GPIO_ECON_OFFSET, 221 .eint_mask = EXYNOS_GPIO_EMASK_OFFSET, 222 .eint_pend = EXYNOS_GPIO_EPEND_OFFSET, 223 /* eint_wake_mask_value not used */ 224 }; 225 226 static int exynos_eint_irq_map(struct irq_domain *h, unsigned int virq, 227 irq_hw_number_t hw) 228 { 229 struct samsung_pin_bank *b = h->host_data; 230 231 irq_set_chip_data(virq, b); 232 irq_set_chip_and_handler(virq, &b->irq_chip->chip, 233 handle_level_irq); 234 return 0; 235 } 236 237 /* 238 * irq domain callbacks for external gpio and wakeup interrupt controllers. 239 */ 240 static const struct irq_domain_ops exynos_eint_irqd_ops = { 241 .map = exynos_eint_irq_map, 242 .xlate = irq_domain_xlate_twocell, 243 }; 244 245 static irqreturn_t exynos_eint_gpio_irq(int irq, void *data) 246 { 247 struct samsung_pinctrl_drv_data *d = data; 248 struct samsung_pin_bank *bank = d->pin_banks; 249 unsigned int svc, group, pin; 250 int ret; 251 252 svc = readl(bank->eint_base + EXYNOS_SVC_OFFSET); 253 group = EXYNOS_SVC_GROUP(svc); 254 pin = svc & EXYNOS_SVC_NUM_MASK; 255 256 if (!group) 257 return IRQ_HANDLED; 258 bank += (group - 1); 259 260 ret = generic_handle_domain_irq(bank->irq_domain, pin); 261 if (ret) 262 return IRQ_NONE; 263 264 return IRQ_HANDLED; 265 } 266 267 struct exynos_eint_gpio_save { 268 u32 eint_con; 269 u32 eint_fltcon0; 270 u32 eint_fltcon1; 271 u32 eint_mask; 272 }; 273 274 /* 275 * exynos_eint_gpio_init() - setup handling of external gpio interrupts. 276 * @d: driver data of samsung pinctrl driver. 277 */ 278 __init int exynos_eint_gpio_init(struct samsung_pinctrl_drv_data *d) 279 { 280 struct samsung_pin_bank *bank; 281 struct device *dev = d->dev; 282 int ret; 283 int i; 284 285 if (!d->irq) { 286 dev_err(dev, "irq number not available\n"); 287 return -EINVAL; 288 } 289 290 ret = devm_request_irq(dev, d->irq, exynos_eint_gpio_irq, 291 0, dev_name(dev), d); 292 if (ret) { 293 dev_err(dev, "irq request failed\n"); 294 return -ENXIO; 295 } 296 297 bank = d->pin_banks; 298 for (i = 0; i < d->nr_banks; ++i, ++bank) { 299 if (bank->eint_type != EINT_TYPE_GPIO) 300 continue; 301 302 bank->irq_chip = devm_kmemdup(dev, &exynos_gpio_irq_chip, 303 sizeof(*bank->irq_chip), GFP_KERNEL); 304 if (!bank->irq_chip) { 305 ret = -ENOMEM; 306 goto err_domains; 307 } 308 bank->irq_chip->chip.name = bank->name; 309 310 bank->irq_domain = irq_domain_add_linear(bank->of_node, 311 bank->nr_pins, &exynos_eint_irqd_ops, bank); 312 if (!bank->irq_domain) { 313 dev_err(dev, "gpio irq domain add failed\n"); 314 ret = -ENXIO; 315 goto err_domains; 316 } 317 318 bank->soc_priv = devm_kzalloc(d->dev, 319 sizeof(struct exynos_eint_gpio_save), GFP_KERNEL); 320 if (!bank->soc_priv) { 321 irq_domain_remove(bank->irq_domain); 322 ret = -ENOMEM; 323 goto err_domains; 324 } 325 326 } 327 328 return 0; 329 330 err_domains: 331 for (--i, --bank; i >= 0; --i, --bank) { 332 if (bank->eint_type != EINT_TYPE_GPIO) 333 continue; 334 irq_domain_remove(bank->irq_domain); 335 } 336 337 return ret; 338 } 339 340 static int exynos_wkup_irq_set_wake(struct irq_data *irqd, unsigned int on) 341 { 342 struct irq_chip *chip = irq_data_get_irq_chip(irqd); 343 struct exynos_irq_chip *our_chip = to_exynos_irq_chip(chip); 344 struct samsung_pin_bank *bank = irq_data_get_irq_chip_data(irqd); 345 unsigned long bit = 1UL << (2 * bank->eint_offset + irqd->hwirq); 346 347 pr_info("wake %s for irq %u (%s-%lu)\n", on ? "enabled" : "disabled", 348 irqd->irq, bank->name, irqd->hwirq); 349 350 if (!on) 351 *our_chip->eint_wake_mask_value |= bit; 352 else 353 *our_chip->eint_wake_mask_value &= ~bit; 354 355 return 0; 356 } 357 358 static void 359 exynos_pinctrl_set_eint_wakeup_mask(struct samsung_pinctrl_drv_data *drvdata, 360 struct exynos_irq_chip *irq_chip) 361 { 362 struct regmap *pmu_regs; 363 364 if (!drvdata->retention_ctrl || !drvdata->retention_ctrl->priv) { 365 dev_warn(drvdata->dev, 366 "No retention data configured bank with external wakeup interrupt. Wake-up mask will not be set.\n"); 367 return; 368 } 369 370 pmu_regs = drvdata->retention_ctrl->priv; 371 dev_info(drvdata->dev, 372 "Setting external wakeup interrupt mask: 0x%x\n", 373 *irq_chip->eint_wake_mask_value); 374 375 regmap_write(pmu_regs, irq_chip->eint_wake_mask_reg, 376 *irq_chip->eint_wake_mask_value); 377 } 378 379 static void 380 s5pv210_pinctrl_set_eint_wakeup_mask(struct samsung_pinctrl_drv_data *drvdata, 381 struct exynos_irq_chip *irq_chip) 382 383 { 384 void __iomem *clk_base; 385 386 if (!drvdata->retention_ctrl || !drvdata->retention_ctrl->priv) { 387 dev_warn(drvdata->dev, 388 "No retention data configured bank with external wakeup interrupt. Wake-up mask will not be set.\n"); 389 return; 390 } 391 392 393 clk_base = (void __iomem *) drvdata->retention_ctrl->priv; 394 395 __raw_writel(*irq_chip->eint_wake_mask_value, 396 clk_base + irq_chip->eint_wake_mask_reg); 397 } 398 399 static u32 eint_wake_mask_value = EXYNOS_EINT_WAKEUP_MASK_DISABLED; 400 /* 401 * irq_chip for wakeup interrupts 402 */ 403 static const struct exynos_irq_chip s5pv210_wkup_irq_chip __initconst = { 404 .chip = { 405 .name = "s5pv210_wkup_irq_chip", 406 .irq_unmask = exynos_irq_unmask, 407 .irq_mask = exynos_irq_mask, 408 .irq_ack = exynos_irq_ack, 409 .irq_set_type = exynos_irq_set_type, 410 .irq_set_wake = exynos_wkup_irq_set_wake, 411 .irq_request_resources = exynos_irq_request_resources, 412 .irq_release_resources = exynos_irq_release_resources, 413 }, 414 .eint_con = EXYNOS_WKUP_ECON_OFFSET, 415 .eint_mask = EXYNOS_WKUP_EMASK_OFFSET, 416 .eint_pend = EXYNOS_WKUP_EPEND_OFFSET, 417 .eint_wake_mask_value = &eint_wake_mask_value, 418 /* Only differences with exynos4210_wkup_irq_chip: */ 419 .eint_wake_mask_reg = S5PV210_EINT_WAKEUP_MASK, 420 .set_eint_wakeup_mask = s5pv210_pinctrl_set_eint_wakeup_mask, 421 }; 422 423 static const struct exynos_irq_chip exynos4210_wkup_irq_chip __initconst = { 424 .chip = { 425 .name = "exynos4210_wkup_irq_chip", 426 .irq_unmask = exynos_irq_unmask, 427 .irq_mask = exynos_irq_mask, 428 .irq_ack = exynos_irq_ack, 429 .irq_set_type = exynos_irq_set_type, 430 .irq_set_wake = exynos_wkup_irq_set_wake, 431 .irq_request_resources = exynos_irq_request_resources, 432 .irq_release_resources = exynos_irq_release_resources, 433 }, 434 .eint_con = EXYNOS_WKUP_ECON_OFFSET, 435 .eint_mask = EXYNOS_WKUP_EMASK_OFFSET, 436 .eint_pend = EXYNOS_WKUP_EPEND_OFFSET, 437 .eint_wake_mask_value = &eint_wake_mask_value, 438 .eint_wake_mask_reg = EXYNOS_EINT_WAKEUP_MASK, 439 .set_eint_wakeup_mask = exynos_pinctrl_set_eint_wakeup_mask, 440 }; 441 442 static const struct exynos_irq_chip exynos7_wkup_irq_chip __initconst = { 443 .chip = { 444 .name = "exynos7_wkup_irq_chip", 445 .irq_unmask = exynos_irq_unmask, 446 .irq_mask = exynos_irq_mask, 447 .irq_ack = exynos_irq_ack, 448 .irq_set_type = exynos_irq_set_type, 449 .irq_set_wake = exynos_wkup_irq_set_wake, 450 .irq_request_resources = exynos_irq_request_resources, 451 .irq_release_resources = exynos_irq_release_resources, 452 }, 453 .eint_con = EXYNOS7_WKUP_ECON_OFFSET, 454 .eint_mask = EXYNOS7_WKUP_EMASK_OFFSET, 455 .eint_pend = EXYNOS7_WKUP_EPEND_OFFSET, 456 .eint_wake_mask_value = &eint_wake_mask_value, 457 .eint_wake_mask_reg = EXYNOS5433_EINT_WAKEUP_MASK, 458 .set_eint_wakeup_mask = exynos_pinctrl_set_eint_wakeup_mask, 459 }; 460 461 /* list of external wakeup controllers supported */ 462 static const struct of_device_id exynos_wkup_irq_ids[] = { 463 { .compatible = "samsung,s5pv210-wakeup-eint", 464 .data = &s5pv210_wkup_irq_chip }, 465 { .compatible = "samsung,exynos4210-wakeup-eint", 466 .data = &exynos4210_wkup_irq_chip }, 467 { .compatible = "samsung,exynos7-wakeup-eint", 468 .data = &exynos7_wkup_irq_chip }, 469 { .compatible = "samsung,exynos850-wakeup-eint", 470 .data = &exynos7_wkup_irq_chip }, 471 { .compatible = "samsung,exynosautov9-wakeup-eint", 472 .data = &exynos7_wkup_irq_chip }, 473 { } 474 }; 475 476 /* interrupt handler for wakeup interrupts 0..15 */ 477 static void exynos_irq_eint0_15(struct irq_desc *desc) 478 { 479 struct exynos_weint_data *eintd = irq_desc_get_handler_data(desc); 480 struct samsung_pin_bank *bank = eintd->bank; 481 struct irq_chip *chip = irq_desc_get_chip(desc); 482 483 chained_irq_enter(chip, desc); 484 485 generic_handle_domain_irq(bank->irq_domain, eintd->irq); 486 487 chained_irq_exit(chip, desc); 488 } 489 490 static inline void exynos_irq_demux_eint(unsigned int pend, 491 struct irq_domain *domain) 492 { 493 unsigned int irq; 494 495 while (pend) { 496 irq = fls(pend) - 1; 497 generic_handle_domain_irq(domain, irq); 498 pend &= ~(1 << irq); 499 } 500 } 501 502 /* interrupt handler for wakeup interrupt 16 */ 503 static void exynos_irq_demux_eint16_31(struct irq_desc *desc) 504 { 505 struct irq_chip *chip = irq_desc_get_chip(desc); 506 struct exynos_muxed_weint_data *eintd = irq_desc_get_handler_data(desc); 507 unsigned int pend; 508 unsigned int mask; 509 int i; 510 511 chained_irq_enter(chip, desc); 512 513 for (i = 0; i < eintd->nr_banks; ++i) { 514 struct samsung_pin_bank *b = eintd->banks[i]; 515 pend = readl(b->eint_base + b->irq_chip->eint_pend 516 + b->eint_offset); 517 mask = readl(b->eint_base + b->irq_chip->eint_mask 518 + b->eint_offset); 519 exynos_irq_demux_eint(pend & ~mask, b->irq_domain); 520 } 521 522 chained_irq_exit(chip, desc); 523 } 524 525 /* 526 * exynos_eint_wkup_init() - setup handling of external wakeup interrupts. 527 * @d: driver data of samsung pinctrl driver. 528 */ 529 __init int exynos_eint_wkup_init(struct samsung_pinctrl_drv_data *d) 530 { 531 struct device *dev = d->dev; 532 struct device_node *wkup_np = NULL; 533 struct device_node *np; 534 struct samsung_pin_bank *bank; 535 struct exynos_weint_data *weint_data; 536 struct exynos_muxed_weint_data *muxed_data; 537 const struct exynos_irq_chip *irq_chip; 538 unsigned int muxed_banks = 0; 539 unsigned int i; 540 int idx, irq; 541 542 for_each_child_of_node(dev->of_node, np) { 543 const struct of_device_id *match; 544 545 match = of_match_node(exynos_wkup_irq_ids, np); 546 if (match) { 547 irq_chip = match->data; 548 wkup_np = np; 549 break; 550 } 551 } 552 if (!wkup_np) 553 return -ENODEV; 554 555 bank = d->pin_banks; 556 for (i = 0; i < d->nr_banks; ++i, ++bank) { 557 if (bank->eint_type != EINT_TYPE_WKUP) 558 continue; 559 560 bank->irq_chip = devm_kmemdup(dev, irq_chip, sizeof(*irq_chip), 561 GFP_KERNEL); 562 if (!bank->irq_chip) { 563 of_node_put(wkup_np); 564 return -ENOMEM; 565 } 566 bank->irq_chip->chip.name = bank->name; 567 568 bank->irq_domain = irq_domain_add_linear(bank->of_node, 569 bank->nr_pins, &exynos_eint_irqd_ops, bank); 570 if (!bank->irq_domain) { 571 dev_err(dev, "wkup irq domain add failed\n"); 572 of_node_put(wkup_np); 573 return -ENXIO; 574 } 575 576 if (!of_find_property(bank->of_node, "interrupts", NULL)) { 577 bank->eint_type = EINT_TYPE_WKUP_MUX; 578 ++muxed_banks; 579 continue; 580 } 581 582 weint_data = devm_kcalloc(dev, 583 bank->nr_pins, sizeof(*weint_data), 584 GFP_KERNEL); 585 if (!weint_data) { 586 of_node_put(wkup_np); 587 return -ENOMEM; 588 } 589 590 for (idx = 0; idx < bank->nr_pins; ++idx) { 591 irq = irq_of_parse_and_map(bank->of_node, idx); 592 if (!irq) { 593 dev_err(dev, "irq number for eint-%s-%d not found\n", 594 bank->name, idx); 595 continue; 596 } 597 weint_data[idx].irq = idx; 598 weint_data[idx].bank = bank; 599 irq_set_chained_handler_and_data(irq, 600 exynos_irq_eint0_15, 601 &weint_data[idx]); 602 } 603 } 604 605 if (!muxed_banks) { 606 of_node_put(wkup_np); 607 return 0; 608 } 609 610 irq = irq_of_parse_and_map(wkup_np, 0); 611 of_node_put(wkup_np); 612 if (!irq) { 613 dev_err(dev, "irq number for muxed EINTs not found\n"); 614 return 0; 615 } 616 617 muxed_data = devm_kzalloc(dev, sizeof(*muxed_data) 618 + muxed_banks*sizeof(struct samsung_pin_bank *), GFP_KERNEL); 619 if (!muxed_data) 620 return -ENOMEM; 621 622 irq_set_chained_handler_and_data(irq, exynos_irq_demux_eint16_31, 623 muxed_data); 624 625 bank = d->pin_banks; 626 idx = 0; 627 for (i = 0; i < d->nr_banks; ++i, ++bank) { 628 if (bank->eint_type != EINT_TYPE_WKUP_MUX) 629 continue; 630 631 muxed_data->banks[idx++] = bank; 632 } 633 muxed_data->nr_banks = muxed_banks; 634 635 return 0; 636 } 637 638 static void exynos_pinctrl_suspend_bank( 639 struct samsung_pinctrl_drv_data *drvdata, 640 struct samsung_pin_bank *bank) 641 { 642 struct exynos_eint_gpio_save *save = bank->soc_priv; 643 void __iomem *regs = bank->eint_base; 644 645 save->eint_con = readl(regs + EXYNOS_GPIO_ECON_OFFSET 646 + bank->eint_offset); 647 save->eint_fltcon0 = readl(regs + EXYNOS_GPIO_EFLTCON_OFFSET 648 + 2 * bank->eint_offset); 649 save->eint_fltcon1 = readl(regs + EXYNOS_GPIO_EFLTCON_OFFSET 650 + 2 * bank->eint_offset + 4); 651 save->eint_mask = readl(regs + bank->irq_chip->eint_mask 652 + bank->eint_offset); 653 654 pr_debug("%s: save con %#010x\n", bank->name, save->eint_con); 655 pr_debug("%s: save fltcon0 %#010x\n", bank->name, save->eint_fltcon0); 656 pr_debug("%s: save fltcon1 %#010x\n", bank->name, save->eint_fltcon1); 657 pr_debug("%s: save mask %#010x\n", bank->name, save->eint_mask); 658 } 659 660 void exynos_pinctrl_suspend(struct samsung_pinctrl_drv_data *drvdata) 661 { 662 struct samsung_pin_bank *bank = drvdata->pin_banks; 663 struct exynos_irq_chip *irq_chip = NULL; 664 int i; 665 666 for (i = 0; i < drvdata->nr_banks; ++i, ++bank) { 667 if (bank->eint_type == EINT_TYPE_GPIO) 668 exynos_pinctrl_suspend_bank(drvdata, bank); 669 else if (bank->eint_type == EINT_TYPE_WKUP) { 670 if (!irq_chip) { 671 irq_chip = bank->irq_chip; 672 irq_chip->set_eint_wakeup_mask(drvdata, 673 irq_chip); 674 } 675 } 676 } 677 } 678 679 static void exynos_pinctrl_resume_bank( 680 struct samsung_pinctrl_drv_data *drvdata, 681 struct samsung_pin_bank *bank) 682 { 683 struct exynos_eint_gpio_save *save = bank->soc_priv; 684 void __iomem *regs = bank->eint_base; 685 686 pr_debug("%s: con %#010x => %#010x\n", bank->name, 687 readl(regs + EXYNOS_GPIO_ECON_OFFSET 688 + bank->eint_offset), save->eint_con); 689 pr_debug("%s: fltcon0 %#010x => %#010x\n", bank->name, 690 readl(regs + EXYNOS_GPIO_EFLTCON_OFFSET 691 + 2 * bank->eint_offset), save->eint_fltcon0); 692 pr_debug("%s: fltcon1 %#010x => %#010x\n", bank->name, 693 readl(regs + EXYNOS_GPIO_EFLTCON_OFFSET 694 + 2 * bank->eint_offset + 4), save->eint_fltcon1); 695 pr_debug("%s: mask %#010x => %#010x\n", bank->name, 696 readl(regs + bank->irq_chip->eint_mask 697 + bank->eint_offset), save->eint_mask); 698 699 writel(save->eint_con, regs + EXYNOS_GPIO_ECON_OFFSET 700 + bank->eint_offset); 701 writel(save->eint_fltcon0, regs + EXYNOS_GPIO_EFLTCON_OFFSET 702 + 2 * bank->eint_offset); 703 writel(save->eint_fltcon1, regs + EXYNOS_GPIO_EFLTCON_OFFSET 704 + 2 * bank->eint_offset + 4); 705 writel(save->eint_mask, regs + bank->irq_chip->eint_mask 706 + bank->eint_offset); 707 } 708 709 void exynos_pinctrl_resume(struct samsung_pinctrl_drv_data *drvdata) 710 { 711 struct samsung_pin_bank *bank = drvdata->pin_banks; 712 int i; 713 714 for (i = 0; i < drvdata->nr_banks; ++i, ++bank) 715 if (bank->eint_type == EINT_TYPE_GPIO) 716 exynos_pinctrl_resume_bank(drvdata, bank); 717 } 718 719 static void exynos_retention_enable(struct samsung_pinctrl_drv_data *drvdata) 720 { 721 if (drvdata->retention_ctrl->refcnt) 722 atomic_inc(drvdata->retention_ctrl->refcnt); 723 } 724 725 static void exynos_retention_disable(struct samsung_pinctrl_drv_data *drvdata) 726 { 727 struct samsung_retention_ctrl *ctrl = drvdata->retention_ctrl; 728 struct regmap *pmu_regs = ctrl->priv; 729 int i; 730 731 if (ctrl->refcnt && !atomic_dec_and_test(ctrl->refcnt)) 732 return; 733 734 for (i = 0; i < ctrl->nr_regs; i++) 735 regmap_write(pmu_regs, ctrl->regs[i], ctrl->value); 736 } 737 738 struct samsung_retention_ctrl * 739 exynos_retention_init(struct samsung_pinctrl_drv_data *drvdata, 740 const struct samsung_retention_data *data) 741 { 742 struct samsung_retention_ctrl *ctrl; 743 struct regmap *pmu_regs; 744 int i; 745 746 ctrl = devm_kzalloc(drvdata->dev, sizeof(*ctrl), GFP_KERNEL); 747 if (!ctrl) 748 return ERR_PTR(-ENOMEM); 749 750 pmu_regs = exynos_get_pmu_regmap(); 751 if (IS_ERR(pmu_regs)) 752 return ERR_CAST(pmu_regs); 753 754 ctrl->priv = pmu_regs; 755 ctrl->regs = data->regs; 756 ctrl->nr_regs = data->nr_regs; 757 ctrl->value = data->value; 758 ctrl->refcnt = data->refcnt; 759 ctrl->enable = exynos_retention_enable; 760 ctrl->disable = exynos_retention_disable; 761 762 /* Ensure that retention is disabled on driver init */ 763 for (i = 0; i < ctrl->nr_regs; i++) 764 regmap_write(pmu_regs, ctrl->regs[i], ctrl->value); 765 766 return ctrl; 767 } 768