diff options
Diffstat (limited to 'drivers/irqchip/exynos-combiner.c')
| -rw-r--r-- | drivers/irqchip/exynos-combiner.c | 176 |
1 files changed, 88 insertions, 88 deletions
diff --git a/drivers/irqchip/exynos-combiner.c b/drivers/irqchip/exynos-combiner.c index 4c6826513901..495848442b35 100644 --- a/drivers/irqchip/exynos-combiner.c +++ b/drivers/irqchip/exynos-combiner.c @@ -1,29 +1,22 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * Copyright (c) 2010-2011 Samsung Electronics Co., Ltd. * http://www.samsung.com * * Combiner irqchip for EXYNOS - * - * 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 <linux/err.h> #include <linux/export.h> #include <linux/init.h> #include <linux/io.h> #include <linux/slab.h> +#include <linux/syscore_ops.h> #include <linux/irqdomain.h> +#include <linux/irqchip.h> #include <linux/irqchip/chained_irq.h> +#include <linux/interrupt.h> #include <linux/of_address.h> #include <linux/of_irq.h> -#include <asm/mach/irq.h> - -#ifdef CONFIG_EXYNOS_ATAGS -#include <plat/cpu.h> -#endif - -#include "irqchip.h" #define COMBINER_ENABLE_SET 0x0 #define COMBINER_ENABLE_CLEAR 0x4 @@ -38,9 +31,14 @@ struct combiner_chip_data { unsigned int irq_mask; void __iomem *base; unsigned int parent_irq; +#ifdef CONFIG_PM + u32 pm_save; +#endif }; +static struct combiner_chip_data *combiner_data; static struct irq_domain *combiner_irq_domain; +static unsigned int max_nr = 20; static inline void __iomem *combiner_base(struct irq_data *data) { @@ -54,27 +52,28 @@ static void combiner_mask_irq(struct irq_data *data) { u32 mask = 1 << (data->hwirq % 32); - __raw_writel(mask, combiner_base(data) + COMBINER_ENABLE_CLEAR); + writel_relaxed(mask, combiner_base(data) + COMBINER_ENABLE_CLEAR); } static void combiner_unmask_irq(struct irq_data *data) { u32 mask = 1 << (data->hwirq % 32); - __raw_writel(mask, combiner_base(data) + COMBINER_ENABLE_SET); + writel_relaxed(mask, combiner_base(data) + COMBINER_ENABLE_SET); } -static void combiner_handle_cascade_irq(unsigned int irq, struct irq_desc *desc) +static void combiner_handle_cascade_irq(struct irq_desc *desc) { - struct combiner_chip_data *chip_data = irq_get_handler_data(irq); - struct irq_chip *chip = irq_get_chip(irq); - unsigned int cascade_irq, combiner_irq; + struct combiner_chip_data *chip_data = irq_desc_get_handler_data(desc); + struct irq_chip *chip = irq_desc_get_chip(desc); + unsigned int combiner_irq; unsigned long status; + int ret; chained_irq_enter(chip, desc); spin_lock(&irq_controller_lock); - status = __raw_readl(chip_data->base + COMBINER_INT_STATUS); + status = readl_relaxed(chip_data->base + COMBINER_INT_STATUS); spin_unlock(&irq_controller_lock); status &= chip_data->irq_mask; @@ -82,12 +81,9 @@ static void combiner_handle_cascade_irq(unsigned int irq, struct irq_desc *desc) goto out; combiner_irq = chip_data->hwirq_offset + __ffs(status); - cascade_irq = irq_find_mapping(combiner_irq_domain, combiner_irq); - - if (unlikely(!cascade_irq)) - do_bad_IRQ(irq, desc); - else - generic_handle_irq(cascade_irq); + ret = generic_handle_domain_irq(combiner_irq_domain, combiner_irq); + if (unlikely(ret)) + handle_bad_irq(desc); out: chained_irq_exit(chip, desc); @@ -120,9 +116,8 @@ static struct irq_chip combiner_chip = { static void __init combiner_cascade_irq(struct combiner_chip_data *combiner_data, unsigned int irq) { - if (irq_set_handler_data(irq, combiner_data) != 0) - BUG(); - irq_set_chained_handler(irq, combiner_handle_cascade_irq); + irq_set_chained_handler_and_data(irq, combiner_handle_cascade_irq, + combiner_data); } static void __init combiner_init_one(struct combiner_chip_data *combiner_data, @@ -135,17 +130,16 @@ static void __init combiner_init_one(struct combiner_chip_data *combiner_data, combiner_data->parent_irq = irq; /* Disable all interrupts */ - __raw_writel(combiner_data->irq_mask, base + COMBINER_ENABLE_CLEAR); + writel_relaxed(combiner_data->irq_mask, base + COMBINER_ENABLE_CLEAR); } -#ifdef CONFIG_OF static int combiner_irq_domain_xlate(struct irq_domain *d, struct device_node *controller, const u32 *intspec, unsigned int intsize, unsigned long *out_hwirq, unsigned int *out_type) { - if (d->of_node != controller) + if (irq_domain_get_of_node(d) != controller) return -EINVAL; if (intsize < 2) @@ -156,16 +150,6 @@ static int combiner_irq_domain_xlate(struct irq_domain *d, return 0; } -#else -static int combiner_irq_domain_xlate(struct irq_domain *d, - struct device_node *controller, - const u32 *intspec, unsigned int intsize, - unsigned long *out_hwirq, - unsigned int *out_type) -{ - return -EINVAL; -} -#endif static int combiner_irq_domain_map(struct irq_domain *d, unsigned int irq, irq_hw_number_t hw) @@ -174,67 +158,37 @@ static int combiner_irq_domain_map(struct irq_domain *d, unsigned int irq, irq_set_chip_and_handler(irq, &combiner_chip, handle_level_irq); irq_set_chip_data(irq, &combiner_data[hw >> 3]); - set_irq_flags(irq, IRQF_VALID | IRQF_PROBE); + irq_set_probe(irq); return 0; } -static struct irq_domain_ops combiner_irq_domain_ops = { +static const struct irq_domain_ops combiner_irq_domain_ops = { .xlate = combiner_irq_domain_xlate, .map = combiner_irq_domain_map, }; -static unsigned int combiner_lookup_irq(int group) -{ -#ifdef CONFIG_EXYNOS_ATAGS - if (group < EXYNOS4210_MAX_COMBINER_NR || soc_is_exynos5250()) - return IRQ_SPI(group); - - switch (group) { - case 16: - return IRQ_SPI(107); - case 17: - return IRQ_SPI(108); - case 18: - return IRQ_SPI(48); - case 19: - return IRQ_SPI(42); - } -#endif - return 0; -} - static void __init combiner_init(void __iomem *combiner_base, - struct device_node *np, - unsigned int max_nr, - int irq_base) + struct device_node *np) { int i, irq; unsigned int nr_irq; - struct combiner_chip_data *combiner_data; nr_irq = max_nr * IRQ_IN_COMBINER; combiner_data = kcalloc(max_nr, sizeof (*combiner_data), GFP_KERNEL); - if (!combiner_data) { - pr_warning("%s: could not allocate combiner data\n", __func__); + if (!combiner_data) return; - } - combiner_irq_domain = irq_domain_add_simple(np, nr_irq, irq_base, + combiner_irq_domain = irq_domain_create_linear(of_fwnode_handle(np), nr_irq, &combiner_irq_domain_ops, combiner_data); if (WARN_ON(!combiner_irq_domain)) { - pr_warning("%s: irq domain init failed\n", __func__); + pr_warn("%s: irq domain init failed\n", __func__); return; } for (i = 0; i < max_nr; i++) { -#ifdef CONFIG_OF - if (np) - irq = irq_of_parse_and_map(np, i); - else -#endif - irq = combiner_lookup_irq(i); + irq = irq_of_parse_and_map(np, i); combiner_init_one(&combiner_data[i], i, combiner_base + (i >> 2) * 0x10, irq); @@ -242,13 +196,65 @@ static void __init combiner_init(void __iomem *combiner_base, } } -#ifdef CONFIG_OF +#ifdef CONFIG_PM + +/** + * combiner_suspend - save interrupt combiner state before suspend + * @data: syscore context + * + * Save the interrupt enable set register for all combiner groups since + * the state is lost when the system enters into a sleep state. + * + */ +static int combiner_suspend(void *data) +{ + int i; + + for (i = 0; i < max_nr; i++) + combiner_data[i].pm_save = + readl_relaxed(combiner_data[i].base + COMBINER_ENABLE_SET); + + return 0; +} + +/** + * combiner_resume - restore interrupt combiner state after resume + * @data: syscore context + * + * Restore the interrupt enable set register for all combiner groups since + * the state is lost when the system enters into a sleep state on suspend. + * + */ +static void combiner_resume(void *data) +{ + int i; + + for (i = 0; i < max_nr; i++) { + writel_relaxed(combiner_data[i].irq_mask, + combiner_data[i].base + COMBINER_ENABLE_CLEAR); + writel_relaxed(combiner_data[i].pm_save, + combiner_data[i].base + COMBINER_ENABLE_SET); + } +} + +#else +#define combiner_suspend NULL +#define combiner_resume NULL +#endif + +static const struct syscore_ops combiner_syscore_ops = { + .suspend = combiner_suspend, + .resume = combiner_resume, +}; + +static struct syscore combiner_syscore = { + .ops = &combiner_syscore_ops, +}; + static int __init combiner_of_init(struct device_node *np, struct device_node *parent) { void __iomem *combiner_base; - unsigned int max_nr = 20; - int irq_base = -1; combiner_base = of_iomap(np, 0); if (!combiner_base) { @@ -262,17 +268,11 @@ static int __init combiner_of_init(struct device_node *np, __func__, max_nr); } - /* - * FIXME: This is a hardwired COMBINER_IRQ(0,0). Once all devices - * get their IRQ from DT, remove this in order to get dynamic - * allocation. - */ - irq_base = 160; + combiner_init(combiner_base, np); - combiner_init(combiner_base, np, max_nr, irq_base); + register_syscore(&combiner_syscore); return 0; } IRQCHIP_DECLARE(exynos4210_combiner, "samsung,exynos4210-combiner", combiner_of_init); -#endif |