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1// SPDX-License-Identifier: GPL-2.0-only2/*3 * Arizona interrupt support4 *5 * Copyright 2012 Wolfson Microelectronics plc6 *7 * Author: Mark Brown <broonie@opensource.wolfsonmicro.com>8 */9 10#include <linux/delay.h>11#include <linux/gpio.h>12#include <linux/interrupt.h>13#include <linux/irq.h>14#include <linux/irqdomain.h>15#include <linux/module.h>16#include <linux/pm_runtime.h>17#include <linux/regmap.h>18#include <linux/regulator/consumer.h>19#include <linux/slab.h>20 21#include <linux/mfd/arizona/core.h>22#include <linux/mfd/arizona/registers.h>23 24#include "arizona.h"25 26#define ARIZONA_AOD_IRQ_INDEX 027#define ARIZONA_MAIN_IRQ_INDEX 128 29static int arizona_map_irq(struct arizona *arizona, int irq)30{31 int ret;32 33 if (arizona->aod_irq_chip) {34 ret = regmap_irq_get_virq(arizona->aod_irq_chip, irq);35 if (ret >= 0)36 return ret;37 }38 39 return regmap_irq_get_virq(arizona->irq_chip, irq);40}41 42int arizona_request_irq(struct arizona *arizona, int irq, char *name,43 irq_handler_t handler, void *data)44{45 irq = arizona_map_irq(arizona, irq);46 if (irq < 0)47 return irq;48 49 return request_threaded_irq(irq, NULL, handler, IRQF_ONESHOT,50 name, data);51}52EXPORT_SYMBOL_GPL(arizona_request_irq);53 54void arizona_free_irq(struct arizona *arizona, int irq, void *data)55{56 irq = arizona_map_irq(arizona, irq);57 if (irq < 0)58 return;59 60 free_irq(irq, data);61}62EXPORT_SYMBOL_GPL(arizona_free_irq);63 64int arizona_set_irq_wake(struct arizona *arizona, int irq, int on)65{66 irq = arizona_map_irq(arizona, irq);67 if (irq < 0)68 return irq;69 70 return irq_set_irq_wake(irq, on);71}72EXPORT_SYMBOL_GPL(arizona_set_irq_wake);73 74static irqreturn_t arizona_boot_done(int irq, void *data)75{76 struct arizona *arizona = data;77 78 dev_dbg(arizona->dev, "Boot done\n");79 80 return IRQ_HANDLED;81}82 83static irqreturn_t arizona_ctrlif_err(int irq, void *data)84{85 struct arizona *arizona = data;86 87 /*88 * For pretty much all potential sources a register cache sync89 * won't help, we've just got a software bug somewhere.90 */91 dev_err(arizona->dev, "Control interface error\n");92 93 return IRQ_HANDLED;94}95 96static irqreturn_t arizona_irq_thread(int irq, void *data)97{98 struct arizona *arizona = data;99 bool poll;100 unsigned int val;101 int ret;102 103 ret = pm_runtime_resume_and_get(arizona->dev);104 if (ret < 0) {105 dev_err(arizona->dev, "Failed to resume device: %d\n", ret);106 return IRQ_NONE;107 }108 109 do {110 poll = false;111 112 if (arizona->aod_irq_chip) {113 /*114 * Check the AOD status register to determine whether115 * the nested IRQ handler should be called.116 */117 ret = regmap_read(arizona->regmap,118 ARIZONA_AOD_IRQ1, &val);119 if (ret)120 dev_warn(arizona->dev,121 "Failed to read AOD IRQ1 %d\n", ret);122 else if (val)123 handle_nested_irq(124 irq_find_mapping(arizona->virq, 0));125 }126 127 /*128 * Check if one of the main interrupts is asserted and only129 * check that domain if it is.130 */131 ret = regmap_read(arizona->regmap, ARIZONA_IRQ_PIN_STATUS,132 &val);133 if (ret == 0 && val & ARIZONA_IRQ1_STS) {134 handle_nested_irq(irq_find_mapping(arizona->virq, 1));135 } else if (ret != 0) {136 dev_err(arizona->dev,137 "Failed to read main IRQ status: %d\n", ret);138 }139 140 /*141 * Poll the IRQ pin status to see if we're really done142 * if the interrupt controller can't do it for us.143 */144 if (!arizona->pdata.irq_gpio) {145 break;146 } else if (arizona->pdata.irq_flags & IRQF_TRIGGER_RISING &&147 gpio_get_value_cansleep(arizona->pdata.irq_gpio)) {148 poll = true;149 } else if (arizona->pdata.irq_flags & IRQF_TRIGGER_FALLING &&150 !gpio_get_value_cansleep(arizona->pdata.irq_gpio)) {151 poll = true;152 }153 } while (poll);154 155 pm_runtime_mark_last_busy(arizona->dev);156 pm_runtime_put_autosuspend(arizona->dev);157 158 return IRQ_HANDLED;159}160 161static void arizona_irq_enable(struct irq_data *data)162{163}164 165static void arizona_irq_disable(struct irq_data *data)166{167}168 169static int arizona_irq_set_wake(struct irq_data *data, unsigned int on)170{171 struct arizona *arizona = irq_data_get_irq_chip_data(data);172 173 return irq_set_irq_wake(arizona->irq, on);174}175 176static struct irq_chip arizona_irq_chip = {177 .name = "arizona",178 .irq_disable = arizona_irq_disable,179 .irq_enable = arizona_irq_enable,180 .irq_set_wake = arizona_irq_set_wake,181};182 183static struct lock_class_key arizona_irq_lock_class;184static struct lock_class_key arizona_irq_request_class;185 186static int arizona_irq_map(struct irq_domain *h, unsigned int virq,187 irq_hw_number_t hw)188{189 struct arizona *data = h->host_data;190 191 irq_set_chip_data(virq, data);192 irq_set_lockdep_class(virq, &arizona_irq_lock_class,193 &arizona_irq_request_class);194 irq_set_chip_and_handler(virq, &arizona_irq_chip, handle_simple_irq);195 irq_set_nested_thread(virq, 1);196 irq_set_noprobe(virq);197 198 return 0;199}200 201static const struct irq_domain_ops arizona_domain_ops = {202 .map = arizona_irq_map,203 .xlate = irq_domain_xlate_twocell,204};205 206int arizona_irq_init(struct arizona *arizona)207{208 int flags = IRQF_ONESHOT;209 int ret;210 const struct regmap_irq_chip *aod, *irq;211 struct irq_data *irq_data;212 unsigned int virq;213 214 arizona->ctrlif_error = true;215 216 switch (arizona->type) {217#ifdef CONFIG_MFD_WM5102218 case WM5102:219 aod = &wm5102_aod;220 irq = &wm5102_irq;221 222 arizona->ctrlif_error = false;223 break;224#endif225#ifdef CONFIG_MFD_WM5110226 case WM5110:227 case WM8280:228 aod = &wm5110_aod;229 230 switch (arizona->rev) {231 case 0 ... 2:232 irq = &wm5110_irq;233 break;234 default:235 irq = &wm5110_revd_irq;236 break;237 }238 239 arizona->ctrlif_error = false;240 break;241#endif242#ifdef CONFIG_MFD_CS47L24243 case WM1831:244 case CS47L24:245 aod = NULL;246 irq = &cs47l24_irq;247 248 arizona->ctrlif_error = false;249 break;250#endif251#ifdef CONFIG_MFD_WM8997252 case WM8997:253 aod = &wm8997_aod;254 irq = &wm8997_irq;255 256 arizona->ctrlif_error = false;257 break;258#endif259#ifdef CONFIG_MFD_WM8998260 case WM8998:261 case WM1814:262 aod = &wm8998_aod;263 irq = &wm8998_irq;264 265 arizona->ctrlif_error = false;266 break;267#endif268 default:269 BUG_ON("Unknown Arizona class device" == NULL);270 return -EINVAL;271 }272 273 /* Disable all wake sources by default */274 regmap_write(arizona->regmap, ARIZONA_WAKE_CONTROL, 0);275 276 /* Read the flags from the interrupt controller if not specified */277 if (!arizona->pdata.irq_flags) {278 irq_data = irq_get_irq_data(arizona->irq);279 if (!irq_data) {280 dev_err(arizona->dev, "Invalid IRQ: %d\n",281 arizona->irq);282 return -EINVAL;283 }284 285 arizona->pdata.irq_flags = irqd_get_trigger_type(irq_data);286 switch (arizona->pdata.irq_flags) {287 case IRQF_TRIGGER_LOW:288 case IRQF_TRIGGER_HIGH:289 case IRQF_TRIGGER_RISING:290 case IRQF_TRIGGER_FALLING:291 break;292 293 case IRQ_TYPE_NONE:294 default:295 /* Device default */296 arizona->pdata.irq_flags = IRQF_TRIGGER_LOW;297 break;298 }299 }300 301 if (arizona->pdata.irq_flags & (IRQF_TRIGGER_HIGH |302 IRQF_TRIGGER_RISING)) {303 ret = regmap_update_bits(arizona->regmap, ARIZONA_IRQ_CTRL_1,304 ARIZONA_IRQ_POL, 0);305 if (ret != 0) {306 dev_err(arizona->dev, "Couldn't set IRQ polarity: %d\n",307 ret);308 goto err;309 }310 }311 312 flags |= arizona->pdata.irq_flags;313 314 /* Allocate a virtual IRQ domain to distribute to the regmap domains */315 arizona->virq = irq_domain_add_linear(NULL, 2, &arizona_domain_ops,316 arizona);317 if (!arizona->virq) {318 dev_err(arizona->dev, "Failed to add core IRQ domain\n");319 ret = -EINVAL;320 goto err;321 }322 323 if (aod) {324 virq = irq_create_mapping(arizona->virq, ARIZONA_AOD_IRQ_INDEX);325 if (!virq) {326 dev_err(arizona->dev, "Failed to map AOD IRQs\n");327 ret = -EINVAL;328 goto err_domain;329 }330 331 ret = regmap_add_irq_chip(arizona->regmap, virq, IRQF_ONESHOT,332 0, aod, &arizona->aod_irq_chip);333 if (ret != 0) {334 dev_err(arizona->dev,335 "Failed to add AOD IRQs: %d\n", ret);336 goto err_map_aod;337 }338 }339 340 virq = irq_create_mapping(arizona->virq, ARIZONA_MAIN_IRQ_INDEX);341 if (!virq) {342 dev_err(arizona->dev, "Failed to map main IRQs\n");343 ret = -EINVAL;344 goto err_aod;345 }346 347 ret = regmap_add_irq_chip(arizona->regmap, virq, IRQF_ONESHOT,348 0, irq, &arizona->irq_chip);349 if (ret != 0) {350 dev_err(arizona->dev, "Failed to add main IRQs: %d\n", ret);351 goto err_map_main_irq;352 }353 354 /* Used to emulate edge trigger and to work around broken pinmux */355 if (arizona->pdata.irq_gpio) {356 if (gpio_to_irq(arizona->pdata.irq_gpio) != arizona->irq) {357 dev_warn(arizona->dev, "IRQ %d is not GPIO %d (%d)\n",358 arizona->irq, arizona->pdata.irq_gpio,359 gpio_to_irq(arizona->pdata.irq_gpio));360 arizona->irq = gpio_to_irq(arizona->pdata.irq_gpio);361 }362 363 ret = devm_gpio_request_one(arizona->dev,364 arizona->pdata.irq_gpio,365 GPIOF_IN, "arizona IRQ");366 if (ret != 0) {367 dev_err(arizona->dev,368 "Failed to request IRQ GPIO %d:: %d\n",369 arizona->pdata.irq_gpio, ret);370 arizona->pdata.irq_gpio = 0;371 }372 }373 374 ret = request_threaded_irq(arizona->irq, NULL, arizona_irq_thread,375 flags, "arizona", arizona);376 377 if (ret != 0) {378 dev_err(arizona->dev, "Failed to request primary IRQ %d: %d\n",379 arizona->irq, ret);380 goto err_main_irq;381 }382 383 /* Make sure the boot done IRQ is unmasked for resumes */384 ret = arizona_request_irq(arizona, ARIZONA_IRQ_BOOT_DONE, "Boot done",385 arizona_boot_done, arizona);386 if (ret != 0) {387 dev_err(arizona->dev, "Failed to request boot done %d: %d\n",388 arizona->irq, ret);389 goto err_boot_done;390 }391 392 /* Handle control interface errors in the core */393 if (arizona->ctrlif_error) {394 ret = arizona_request_irq(arizona, ARIZONA_IRQ_CTRLIF_ERR,395 "Control interface error",396 arizona_ctrlif_err, arizona);397 if (ret != 0) {398 dev_err(arizona->dev,399 "Failed to request CTRLIF_ERR %d: %d\n",400 arizona->irq, ret);401 goto err_ctrlif;402 }403 }404 405 return 0;406 407err_ctrlif:408 arizona_free_irq(arizona, ARIZONA_IRQ_BOOT_DONE, arizona);409err_boot_done:410 free_irq(arizona->irq, arizona);411err_main_irq:412 regmap_del_irq_chip(irq_find_mapping(arizona->virq,413 ARIZONA_MAIN_IRQ_INDEX),414 arizona->irq_chip);415err_map_main_irq:416 irq_dispose_mapping(irq_find_mapping(arizona->virq,417 ARIZONA_MAIN_IRQ_INDEX));418err_aod:419 regmap_del_irq_chip(irq_find_mapping(arizona->virq,420 ARIZONA_AOD_IRQ_INDEX),421 arizona->aod_irq_chip);422err_map_aod:423 irq_dispose_mapping(irq_find_mapping(arizona->virq,424 ARIZONA_AOD_IRQ_INDEX));425err_domain:426 irq_domain_remove(arizona->virq);427err:428 return ret;429}430 431int arizona_irq_exit(struct arizona *arizona)432{433 unsigned int virq;434 435 if (arizona->ctrlif_error)436 arizona_free_irq(arizona, ARIZONA_IRQ_CTRLIF_ERR, arizona);437 arizona_free_irq(arizona, ARIZONA_IRQ_BOOT_DONE, arizona);438 439 virq = irq_find_mapping(arizona->virq, ARIZONA_MAIN_IRQ_INDEX);440 regmap_del_irq_chip(virq, arizona->irq_chip);441 irq_dispose_mapping(virq);442 443 virq = irq_find_mapping(arizona->virq, ARIZONA_AOD_IRQ_INDEX);444 regmap_del_irq_chip(virq, arizona->aod_irq_chip);445 irq_dispose_mapping(virq);446 447 irq_domain_remove(arizona->virq);448 449 free_irq(arizona->irq, arizona);450 451 return 0;452}453