/* * Arizona interrupt support * * Copyright 2012 Wolfson Microelectronics plc * * Author: Mark Brown * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. */ #include #include #include #include #include #include #include #include #include #include #include #include #include "arizona.h" static int arizona_map_irq(struct arizona *arizona, int irq) { int ret; ret = regmap_irq_get_virq(arizona->aod_irq_chip, irq); if (ret < 0) ret = regmap_irq_get_virq(arizona->irq_chip, irq); return ret; } int arizona_request_irq(struct arizona *arizona, int irq, char *name, irq_handler_t handler, void *data) { irq = arizona_map_irq(arizona, irq); if (irq < 0) return irq; return request_threaded_irq(irq, NULL, handler, IRQF_ONESHOT, name, data); } EXPORT_SYMBOL_GPL(arizona_request_irq); void arizona_free_irq(struct arizona *arizona, int irq, void *data) { irq = arizona_map_irq(arizona, irq); if (irq < 0) return; free_irq(irq, data); } EXPORT_SYMBOL_GPL(arizona_free_irq); int arizona_set_irq_wake(struct arizona *arizona, int irq, int on) { irq = arizona_map_irq(arizona, irq); if (irq < 0) return irq; return irq_set_irq_wake(irq, on); } EXPORT_SYMBOL_GPL(arizona_set_irq_wake); static irqreturn_t arizona_boot_done(int irq, void *data) { struct arizona *arizona = data; dev_dbg(arizona->dev, "Boot done\n"); return IRQ_HANDLED; } static irqreturn_t arizona_ctrlif_err(int irq, void *data) { struct arizona *arizona = data; /* * For pretty much all potential sources a register cache sync * won't help, we've just got a software bug somewhere. */ dev_err(arizona->dev, "Control interface error\n"); return IRQ_HANDLED; } static irqreturn_t arizona_irq_thread(int irq, void *data) { struct arizona *arizona = data; int i, ret; ret = pm_runtime_get_sync(arizona->dev); if (ret < 0) { dev_err(arizona->dev, "Failed to resume device: %d\n", ret); return IRQ_NONE; } /* Check both domains */ for (i = 0; i < 2; i++) handle_nested_irq(irq_find_mapping(arizona->virq, i)); pm_runtime_mark_last_busy(arizona->dev); pm_runtime_put_autosuspend(arizona->dev); return IRQ_HANDLED; } static void arizona_irq_enable(struct irq_data *data) { } static void arizona_irq_disable(struct irq_data *data) { } static struct irq_chip arizona_irq_chip = { .name = "arizona", .irq_disable = arizona_irq_disable, .irq_enable = arizona_irq_enable, }; static int arizona_irq_map(struct irq_domain *h, unsigned int virq, irq_hw_number_t hw) { struct regmap_irq_chip_data *data = h->host_data; irq_set_chip_data(virq, data); irq_set_chip_and_handler(virq, &arizona_irq_chip, handle_edge_irq); irq_set_nested_thread(virq, 1); /* ARM needs us to explicitly flag the IRQ as valid * and will set them noprobe when we do so. */ #ifdef CONFIG_ARM set_irq_flags(virq, IRQF_VALID); #else irq_set_noprobe(virq); #endif return 0; } static struct irq_domain_ops arizona_domain_ops = { .map = arizona_irq_map, .xlate = irq_domain_xlate_twocell, }; int arizona_irq_init(struct arizona *arizona) { int flags = IRQF_ONESHOT; int ret, i; const struct regmap_irq_chip *aod, *irq; switch (arizona->type) { #ifdef CONFIG_MFD_WM5102 case WM5102: aod = &wm5102_aod; irq = &wm5102_irq; break; #endif #ifdef CONFIG_MFD_WM5110 case WM5110: aod = &wm5110_aod; irq = &wm5110_irq; break; #endif default: BUG_ON("Unknown Arizona class device" == NULL); return -EINVAL; } if (arizona->pdata.irq_active_high) { ret = regmap_update_bits(arizona->regmap, ARIZONA_IRQ_CTRL_1, ARIZONA_IRQ_POL, 0); if (ret != 0) { dev_err(arizona->dev, "Couldn't set IRQ polarity: %d\n", ret); goto err; } flags |= IRQF_TRIGGER_HIGH; } else { flags |= IRQF_TRIGGER_LOW; } /* Allocate a virtual IRQ domain to distribute to the regmap domains */ arizona->virq = irq_domain_add_linear(NULL, 2, &arizona_domain_ops, arizona); if (!arizona->virq) { ret = -EINVAL; goto err; } ret = regmap_add_irq_chip(arizona->regmap, irq_create_mapping(arizona->virq, 0), IRQF_ONESHOT, -1, aod, &arizona->aod_irq_chip); if (ret != 0) { dev_err(arizona->dev, "Failed to add AOD IRQs: %d\n", ret); goto err_domain; } ret = regmap_add_irq_chip(arizona->regmap, irq_create_mapping(arizona->virq, 1), IRQF_ONESHOT, -1, irq, &arizona->irq_chip); if (ret != 0) { dev_err(arizona->dev, "Failed to add AOD IRQs: %d\n", ret); goto err_aod; } /* Make sure the boot done IRQ is unmasked for resumes */ i = arizona_map_irq(arizona, ARIZONA_IRQ_BOOT_DONE); ret = request_threaded_irq(i, NULL, arizona_boot_done, IRQF_ONESHOT, "Boot done", arizona); if (ret != 0) { dev_err(arizona->dev, "Failed to request boot done %d: %d\n", arizona->irq, ret); goto err_boot_done; } /* Handle control interface errors in the core */ i = arizona_map_irq(arizona, ARIZONA_IRQ_CTRLIF_ERR); ret = request_threaded_irq(i, NULL, arizona_ctrlif_err, IRQF_ONESHOT, "Control interface error", arizona); if (ret != 0) { dev_err(arizona->dev, "Failed to request boot done %d: %d\n", arizona->irq, ret); goto err_ctrlif; } ret = request_threaded_irq(arizona->irq, NULL, arizona_irq_thread, flags, "arizona", arizona); if (ret != 0) { dev_err(arizona->dev, "Failed to request IRQ %d: %d\n", arizona->irq, ret); goto err_main_irq; } return 0; err_main_irq: free_irq(arizona_map_irq(arizona, ARIZONA_IRQ_CTRLIF_ERR), arizona); err_ctrlif: free_irq(arizona_map_irq(arizona, ARIZONA_IRQ_BOOT_DONE), arizona); err_boot_done: regmap_del_irq_chip(irq_create_mapping(arizona->virq, 1), arizona->irq_chip); err_aod: regmap_del_irq_chip(irq_create_mapping(arizona->virq, 0), arizona->aod_irq_chip); err_domain: err: return ret; } int arizona_irq_exit(struct arizona *arizona) { free_irq(arizona_map_irq(arizona, ARIZONA_IRQ_CTRLIF_ERR), arizona); free_irq(arizona_map_irq(arizona, ARIZONA_IRQ_BOOT_DONE), arizona); regmap_del_irq_chip(irq_create_mapping(arizona->virq, 1), arizona->irq_chip); regmap_del_irq_chip(irq_create_mapping(arizona->virq, 0), arizona->aod_irq_chip); free_irq(arizona->irq, arizona); return 0; }