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