diff options
Diffstat (limited to 'drivers/irqchip')
| -rw-r--r-- | drivers/irqchip/Kconfig | 8 | ||||
| -rw-r--r-- | drivers/irqchip/Makefile | 9 | ||||
| -rw-r--r-- | drivers/irqchip/exynos-combiner.c | 158 | ||||
| -rw-r--r-- | drivers/irqchip/irq-armada-370-xp.c | 288 | ||||
| -rw-r--r-- | drivers/irqchip/irq-gic.c | 39 | ||||
| -rw-r--r-- | drivers/irqchip/irq-mxs.c | 121 | ||||
| -rw-r--r-- | drivers/irqchip/irq-renesas-intc-irqpin.c | 547 | ||||
| -rw-r--r-- | drivers/irqchip/irq-renesas-irqc.c | 307 | ||||
| -rw-r--r-- | drivers/irqchip/irq-s3c24xx.c | 1356 | ||||
| -rw-r--r-- | drivers/irqchip/irq-sirfsoc.c | 126 | ||||
| -rw-r--r-- | drivers/irqchip/irq-sun4i.c | 149 | ||||
| -rw-r--r-- | drivers/irqchip/irq-sunxi.c | 151 | ||||
| -rw-r--r-- | drivers/irqchip/irq-versatile-fpga.c | 2 | ||||
| -rw-r--r-- | drivers/irqchip/irq-vic.c | 3 | ||||
| -rw-r--r-- | drivers/irqchip/irq-vt8500.c | 259 |
15 files changed, 3302 insertions, 221 deletions
diff --git a/drivers/irqchip/Kconfig b/drivers/irqchip/Kconfig index a350969e5efe..4a33351c25dc 100644 --- a/drivers/irqchip/Kconfig +++ b/drivers/irqchip/Kconfig @@ -25,6 +25,14 @@ config ARM_VIC_NR The maximum number of VICs available in the system, for power management. +config RENESAS_INTC_IRQPIN + bool + select IRQ_DOMAIN + +config RENESAS_IRQC + bool + select IRQ_DOMAIN + config VERSATILE_FPGA_IRQ bool select IRQ_DOMAIN diff --git a/drivers/irqchip/Makefile b/drivers/irqchip/Makefile index 98e3b87bdf1b..cda4cb5f7327 100644 --- a/drivers/irqchip/Makefile +++ b/drivers/irqchip/Makefile @@ -2,10 +2,17 @@ obj-$(CONFIG_IRQCHIP) += irqchip.o obj-$(CONFIG_ARCH_BCM2835) += irq-bcm2835.o obj-$(CONFIG_ARCH_EXYNOS) += exynos-combiner.o +obj-$(CONFIG_ARCH_MVEBU) += irq-armada-370-xp.o +obj-$(CONFIG_ARCH_MXS) += irq-mxs.o +obj-$(CONFIG_ARCH_S3C24XX) += irq-s3c24xx.o obj-$(CONFIG_METAG) += irq-metag-ext.o obj-$(CONFIG_METAG_PERFCOUNTER_IRQS) += irq-metag.o -obj-$(CONFIG_ARCH_SUNXI) += irq-sunxi.o +obj-$(CONFIG_ARCH_SUNXI) += irq-sun4i.o obj-$(CONFIG_ARCH_SPEAR3XX) += spear-shirq.o obj-$(CONFIG_ARM_GIC) += irq-gic.o obj-$(CONFIG_ARM_VIC) += irq-vic.o +obj-$(CONFIG_SIRF_IRQ) += irq-sirfsoc.o +obj-$(CONFIG_RENESAS_INTC_IRQPIN) += irq-renesas-intc-irqpin.o +obj-$(CONFIG_RENESAS_IRQC) += irq-renesas-irqc.o obj-$(CONFIG_VERSATILE_FPGA_IRQ) += irq-versatile-fpga.o +obj-$(CONFIG_ARCH_VT8500) += irq-vt8500.o diff --git a/drivers/irqchip/exynos-combiner.c b/drivers/irqchip/exynos-combiner.c index 04d86a9803f4..a9d2b2fa4afd 100644 --- a/drivers/irqchip/exynos-combiner.c +++ b/drivers/irqchip/exynos-combiner.c @@ -12,12 +12,16 @@ #include <linux/export.h> #include <linux/init.h> #include <linux/io.h> +#include <linux/slab.h> #include <linux/irqdomain.h> +#include <linux/irqchip/chained_irq.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" @@ -25,16 +29,18 @@ #define COMBINER_ENABLE_CLEAR 0x4 #define COMBINER_INT_STATUS 0xC +#define IRQ_IN_COMBINER 8 + static DEFINE_SPINLOCK(irq_controller_lock); struct combiner_chip_data { - unsigned int irq_offset; + unsigned int hwirq_offset; unsigned int irq_mask; void __iomem *base; + unsigned int parent_irq; }; static struct irq_domain *combiner_irq_domain; -static struct combiner_chip_data combiner_data[MAX_COMBINER_NR]; static inline void __iomem *combiner_base(struct irq_data *data) { @@ -75,11 +81,11 @@ static void combiner_handle_cascade_irq(unsigned int irq, struct irq_desc *desc) if (status == 0) goto out; - combiner_irq = __ffs(status); + combiner_irq = chip_data->hwirq_offset + __ffs(status); + cascade_irq = irq_find_mapping(combiner_irq_domain, combiner_irq); - cascade_irq = combiner_irq + (chip_data->irq_offset & ~31); - if (unlikely(cascade_irq >= NR_IRQS)) - do_bad_IRQ(cascade_irq, desc); + if (unlikely(!cascade_irq)) + do_bad_IRQ(irq, desc); else generic_handle_irq(cascade_irq); @@ -87,39 +93,49 @@ static void combiner_handle_cascade_irq(unsigned int irq, struct irq_desc *desc) chained_irq_exit(chip, desc); } -static struct irq_chip combiner_chip = { - .name = "COMBINER", - .irq_mask = combiner_mask_irq, - .irq_unmask = combiner_unmask_irq, -}; - -static void __init combiner_cascade_irq(unsigned int combiner_nr, unsigned int irq) +#ifdef CONFIG_SMP +static int combiner_set_affinity(struct irq_data *d, + const struct cpumask *mask_val, bool force) { - unsigned int max_nr; + struct combiner_chip_data *chip_data = irq_data_get_irq_chip_data(d); + struct irq_chip *chip = irq_get_chip(chip_data->parent_irq); + struct irq_data *data = irq_get_irq_data(chip_data->parent_irq); - if (soc_is_exynos5250()) - max_nr = EXYNOS5_MAX_COMBINER_NR; + if (chip && chip->irq_set_affinity) + return chip->irq_set_affinity(data, mask_val, force); else - max_nr = EXYNOS4_MAX_COMBINER_NR; + return -EINVAL; +} +#endif - if (combiner_nr >= max_nr) - BUG(); - if (irq_set_handler_data(irq, &combiner_data[combiner_nr]) != 0) +static struct irq_chip combiner_chip = { + .name = "COMBINER", + .irq_mask = combiner_mask_irq, + .irq_unmask = combiner_unmask_irq, +#ifdef CONFIG_SMP + .irq_set_affinity = combiner_set_affinity, +#endif +}; + +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); } -static void __init combiner_init_one(unsigned int combiner_nr, - void __iomem *base) +static void __init combiner_init_one(struct combiner_chip_data *combiner_data, + unsigned int combiner_nr, + void __iomem *base, unsigned int irq) { - combiner_data[combiner_nr].base = base; - combiner_data[combiner_nr].irq_offset = irq_find_mapping( - combiner_irq_domain, combiner_nr * MAX_IRQ_IN_COMBINER); - combiner_data[combiner_nr].irq_mask = 0xff << ((combiner_nr % 4) << 3); + combiner_data->base = base; + combiner_data->hwirq_offset = (combiner_nr & ~3) * IRQ_IN_COMBINER; + combiner_data->irq_mask = 0xff << ((combiner_nr % 4) << 3); + combiner_data->parent_irq = irq; /* Disable all interrupts */ - __raw_writel(combiner_data[combiner_nr].irq_mask, - base + COMBINER_ENABLE_CLEAR); + __raw_writel(combiner_data->irq_mask, base + COMBINER_ENABLE_CLEAR); } #ifdef CONFIG_OF @@ -135,7 +151,7 @@ static int combiner_irq_domain_xlate(struct irq_domain *d, if (intsize < 2) return -EINVAL; - *out_hwirq = intspec[0] * MAX_IRQ_IN_COMBINER + intspec[1]; + *out_hwirq = intspec[0] * IRQ_IN_COMBINER + intspec[1]; *out_type = 0; return 0; @@ -154,6 +170,8 @@ static int combiner_irq_domain_xlate(struct irq_domain *d, static int combiner_irq_domain_map(struct irq_domain *d, unsigned int irq, irq_hw_number_t hw) { + struct combiner_chip_data *combiner_data = d->host_data; + 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); @@ -166,46 +184,61 @@ static struct irq_domain_ops combiner_irq_domain_ops = { .map = combiner_irq_domain_map, }; -void __init combiner_init(void __iomem *combiner_base, - struct device_node *np) +static unsigned int combiner_lookup_irq(int group) { - int i, irq, irq_base; - unsigned int max_nr, nr_irq; - - if (np) { - if (of_property_read_u32(np, "samsung,combiner-nr", &max_nr)) { - pr_warning("%s: number of combiners not specified, " - "setting default as %d.\n", - __func__, EXYNOS4_MAX_COMBINER_NR); - max_nr = EXYNOS4_MAX_COMBINER_NR; - } - } else { - max_nr = soc_is_exynos5250() ? EXYNOS5_MAX_COMBINER_NR : - EXYNOS4_MAX_COMBINER_NR; +#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); } - nr_irq = max_nr * MAX_IRQ_IN_COMBINER; +#endif + return 0; +} + +void __init combiner_init(void __iomem *combiner_base, + struct device_node *np, + unsigned int max_nr, + int irq_base) +{ + int i, irq; + unsigned int nr_irq; + struct combiner_chip_data *combiner_data; + + nr_irq = max_nr * IRQ_IN_COMBINER; - irq_base = irq_alloc_descs(COMBINER_IRQ(0, 0), 1, nr_irq, 0); - if (IS_ERR_VALUE(irq_base)) { - irq_base = COMBINER_IRQ(0, 0); - pr_warning("%s: irq desc alloc failed. Continuing with %d as linux irq base\n", __func__, irq_base); + combiner_data = kcalloc(max_nr, sizeof (*combiner_data), GFP_KERNEL); + if (!combiner_data) { + pr_warning("%s: could not allocate combiner data\n", __func__); + return; } - combiner_irq_domain = irq_domain_add_legacy(np, nr_irq, irq_base, 0, - &combiner_irq_domain_ops, &combiner_data); + combiner_irq_domain = irq_domain_add_simple(np, nr_irq, irq_base, + &combiner_irq_domain_ops, combiner_data); if (WARN_ON(!combiner_irq_domain)) { pr_warning("%s: irq domain init failed\n", __func__); return; } for (i = 0; i < max_nr; i++) { - combiner_init_one(i, combiner_base + (i >> 2) * 0x10); - irq = IRQ_SPI(i); #ifdef CONFIG_OF if (np) irq = irq_of_parse_and_map(np, i); + else #endif - combiner_cascade_irq(i, irq); + irq = combiner_lookup_irq(i); + + combiner_init_one(&combiner_data[i], i, + combiner_base + (i >> 2) * 0x10, irq); + combiner_cascade_irq(&combiner_data[i], irq); } } @@ -214,6 +247,8 @@ 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) { @@ -221,7 +256,20 @@ static int __init combiner_of_init(struct device_node *np, return -ENXIO; } - combiner_init(combiner_base, np); + if (of_property_read_u32(np, "samsung,combiner-nr", &max_nr)) { + pr_info("%s: number of combiners not specified, " + "setting default as %d.\n", + __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, max_nr, irq_base); return 0; } diff --git a/drivers/irqchip/irq-armada-370-xp.c b/drivers/irqchip/irq-armada-370-xp.c new file mode 100644 index 000000000000..bb328a366122 --- /dev/null +++ b/drivers/irqchip/irq-armada-370-xp.c @@ -0,0 +1,288 @@ +/* + * Marvell Armada 370 and Armada XP SoC IRQ handling + * + * Copyright (C) 2012 Marvell + * + * Lior Amsalem <alior@marvell.com> + * Gregory CLEMENT <gregory.clement@free-electrons.com> + * Thomas Petazzoni <thomas.petazzoni@free-electrons.com> + * Ben Dooks <ben.dooks@codethink.co.uk> + * + * This file is licensed under the terms of the GNU General Public + * License version 2. This program is licensed "as is" without any + * warranty of any kind, whether express or implied. + */ + +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/init.h> +#include <linux/irq.h> +#include <linux/interrupt.h> +#include <linux/io.h> +#include <linux/of_address.h> +#include <linux/of_irq.h> +#include <linux/irqdomain.h> +#include <asm/mach/arch.h> +#include <asm/exception.h> +#include <asm/smp_plat.h> +#include <asm/mach/irq.h> + +#include "irqchip.h" + +/* Interrupt Controller Registers Map */ +#define ARMADA_370_XP_INT_SET_MASK_OFFS (0x48) +#define ARMADA_370_XP_INT_CLEAR_MASK_OFFS (0x4C) + +#define ARMADA_370_XP_INT_CONTROL (0x00) +#define ARMADA_370_XP_INT_SET_ENABLE_OFFS (0x30) +#define ARMADA_370_XP_INT_CLEAR_ENABLE_OFFS (0x34) +#define ARMADA_370_XP_INT_SOURCE_CTL(irq) (0x100 + irq*4) + +#define ARMADA_370_XP_CPU_INTACK_OFFS (0x44) + +#define ARMADA_370_XP_SW_TRIG_INT_OFFS (0x4) +#define ARMADA_370_XP_IN_DRBEL_MSK_OFFS (0xc) +#define ARMADA_370_XP_IN_DRBEL_CAUSE_OFFS (0x8) + +#define ARMADA_370_XP_MAX_PER_CPU_IRQS (28) + +#define ARMADA_370_XP_TIMER0_PER_CPU_IRQ (5) + +#define IPI_DOORBELL_START (0) +#define IPI_DOORBELL_END (8) +#define IPI_DOORBELL_MASK 0xFF + +static DEFINE_RAW_SPINLOCK(irq_controller_lock); + +static void __iomem *per_cpu_int_base; +static void __iomem *main_int_base; +static struct irq_domain *armada_370_xp_mpic_domain; + +/* + * In SMP mode: + * For shared global interrupts, mask/unmask global enable bit + * For CPU interrupts, mask/unmask the calling CPU's bit + */ +static void armada_370_xp_irq_mask(struct irq_data *d) +{ + irq_hw_number_t hwirq = irqd_to_hwirq(d); + + if (hwirq != ARMADA_370_XP_TIMER0_PER_CPU_IRQ) + writel(hwirq, main_int_base + + ARMADA_370_XP_INT_CLEAR_ENABLE_OFFS); + else + writel(hwirq, per_cpu_int_base + + ARMADA_370_XP_INT_SET_MASK_OFFS); +} + +static void armada_370_xp_irq_unmask(struct irq_data *d) +{ + irq_hw_number_t hwirq = irqd_to_hwirq(d); + + if (hwirq != ARMADA_370_XP_TIMER0_PER_CPU_IRQ) + writel(hwirq, main_int_base + + ARMADA_370_XP_INT_SET_ENABLE_OFFS); + else + writel(hwirq, per_cpu_int_base + + ARMADA_370_XP_INT_CLEAR_MASK_OFFS); +} + +#ifdef CONFIG_SMP +static int armada_xp_set_affinity(struct irq_data *d, + const struct cpumask *mask_val, bool force) +{ + unsigned long reg; + unsigned long new_mask = 0; + unsigned long online_mask = 0; + unsigned long count = 0; + irq_hw_number_t hwirq = irqd_to_hwirq(d); + int cpu; + + for_each_cpu(cpu, mask_val) { + new_mask |= 1 << cpu_logical_map(cpu); + count++; + } + + /* + * Forbid mutlicore interrupt affinity + * This is required since the MPIC HW doesn't limit + * several CPUs from acknowledging the same interrupt. + */ + if (count > 1) + return -EINVAL; + + for_each_cpu(cpu, cpu_online_mask) + online_mask |= 1 << cpu_logical_map(cpu); + + raw_spin_lock(&irq_controller_lock); + + reg = readl(main_int_base + ARMADA_370_XP_INT_SOURCE_CTL(hwirq)); + reg = (reg & (~online_mask)) | new_mask; + writel(reg, main_int_base + ARMADA_370_XP_INT_SOURCE_CTL(hwirq)); + + raw_spin_unlock(&irq_controller_lock); + + return 0; +} +#endif + +static struct irq_chip armada_370_xp_irq_chip = { + .name = "armada_370_xp_irq", + .irq_mask = armada_370_xp_irq_mask, + .irq_mask_ack = armada_370_xp_irq_mask, + .irq_unmask = armada_370_xp_irq_unmask, +#ifdef CONFIG_SMP + .irq_set_affinity = armada_xp_set_affinity, +#endif +}; + +static int armada_370_xp_mpic_irq_map(struct irq_domain *h, + unsigned int virq, irq_hw_number_t hw) +{ + armada_370_xp_irq_mask(irq_get_irq_data(virq)); + if (hw != ARMADA_370_XP_TIMER0_PER_CPU_IRQ) + writel(hw, per_cpu_int_base + + ARMADA_370_XP_INT_CLEAR_MASK_OFFS); + else + writel(hw, main_int_base + ARMADA_370_XP_INT_SET_ENABLE_OFFS); + irq_set_status_flags(virq, IRQ_LEVEL); + + if (hw == ARMADA_370_XP_TIMER0_PER_CPU_IRQ) { + irq_set_percpu_devid(virq); + irq_set_chip_and_handler(virq, &armada_370_xp_irq_chip, + handle_percpu_devid_irq); + + } else { + irq_set_chip_and_handler(virq, &armada_370_xp_irq_chip, + handle_level_irq); + } + set_irq_flags(virq, IRQF_VALID | IRQF_PROBE); + + return 0; +} + +#ifdef CONFIG_SMP +void armada_mpic_send_doorbell(const struct cpumask *mask, unsigned int irq) +{ + int cpu; + unsigned long map = 0; + + /* Convert our logical CPU mask into a physical one. */ + for_each_cpu(cpu, mask) + map |= 1 << cpu_logical_map(cpu); + + /* + * Ensure that stores to Normal memory are visible to the + * other CPUs before issuing the IPI. + */ + dsb(); + + /* submit softirq */ + writel((map << 8) | irq, main_int_base + + ARMADA_370_XP_SW_TRIG_INT_OFFS); +} + +void armada_xp_mpic_smp_cpu_init(void) +{ + /* Clear pending IPIs */ + writel(0, per_cpu_int_base + ARMADA_370_XP_IN_DRBEL_CAUSE_OFFS); + + /* Enable first 8 IPIs */ + writel(IPI_DOORBELL_MASK, per_cpu_int_base + + ARMADA_370_XP_IN_DRBEL_MSK_OFFS); + + /* Unmask IPI interrupt */ + writel(0, per_cpu_int_base + ARMADA_370_XP_INT_CLEAR_MASK_OFFS); +} +#endif /* CONFIG_SMP */ + +static struct irq_domain_ops armada_370_xp_mpic_irq_ops = { + .map = armada_370_xp_mpic_irq_map, + .xlate = irq_domain_xlate_onecell, +}; + +static asmlinkage void __exception_irq_entry +armada_370_xp_handle_irq(struct pt_regs *regs) +{ + u32 irqstat, irqnr; + + do { + irqstat = readl_relaxed(per_cpu_int_base + + ARMADA_370_XP_CPU_INTACK_OFFS); + irqnr = irqstat & 0x3FF; + + if (irqnr > 1022) + break; + + if (irqnr > 0) { + irqnr = irq_find_mapping(armada_370_xp_mpic_domain, + irqnr); + handle_IRQ(irqnr, regs); + continue; + } +#ifdef CONFIG_SMP + /* IPI Handling */ + if (irqnr == 0) { + u32 ipimask, ipinr; + + ipimask = readl_relaxed(per_cpu_int_base + + ARMADA_370_XP_IN_DRBEL_CAUSE_OFFS) + & IPI_DOORBELL_MASK; + + writel(~IPI_DOORBELL_MASK, per_cpu_int_base + + ARMADA_370_XP_IN_DRBEL_CAUSE_OFFS); + + /* Handle all pending doorbells */ + for (ipinr = IPI_DOORBELL_START; + ipinr < IPI_DOORBELL_END; ipinr++) { + if (ipimask & (0x1 << ipinr)) + handle_IPI(ipinr, regs); + } + continue; + } +#endif + + } while (1); +} + +static int __init armada_370_xp_mpic_of_init(struct device_node *node, + struct device_node *parent) +{ + u32 control; + + main_int_base = of_iomap(node, 0); + per_cpu_int_base = of_iomap(node, 1); + + BUG_ON(!main_int_base); + BUG_ON(!per_cpu_int_base); + + control = readl(main_int_base + ARMADA_370_XP_INT_CONTROL); + + armada_370_xp_mpic_domain = + irq_domain_add_linear(node, (control >> 2) & 0x3ff, + &armada_370_xp_mpic_irq_ops, NULL); + + if (!armada_370_xp_mpic_domain) + panic("Unable to add Armada_370_Xp MPIC irq domain (DT)\n"); + + irq_set_default_host(armada_370_xp_mpic_domain); + +#ifdef CONFIG_SMP + armada_xp_mpic_smp_cpu_init(); + + /* + * Set the default affinity from all CPUs to the boot cpu. + * This is required since the MPIC doesn't limit several CPUs + * from acknowledging the same interrupt. + */ + cpumask_clear(irq_default_affinity); + cpumask_set_cpu(smp_processor_id(), irq_default_affinity); + +#endif + + set_handle_irq(armada_370_xp_handle_irq); + + return 0; +} + +IRQCHIP_DECLARE(armada_370_xp_mpic, "marvell,mpic", armada_370_xp_mpic_of_init); diff --git a/drivers/irqchip/irq-gic.c b/drivers/irqchip/irq-gic.c index a32e0d5aa45f..1760ceb68b7b 100644 --- a/drivers/irqchip/irq-gic.c +++ b/drivers/irqchip/irq-gic.c @@ -28,6 +28,7 @@ #include <linux/module.h> #include <linux/list.h> #include <linux/smp.h> +#include <linux/cpu.h> #include <linux/cpu_pm.h> #include <linux/cpumask.h> #include <linux/io.h> @@ -38,12 +39,12 @@ #include <linux/interrupt.h> #include <linux/percpu.h> #include <linux/slab.h> +#include <linux/irqchip/chained_irq.h> #include <linux/irqchip/arm-gic.h> #include <asm/irq.h> #include <asm/exception.h> #include <asm/smp_plat.h> -#include <asm/mach/irq.h> #include "irqchip.h" @@ -127,7 +128,7 @@ static inline void gic_set_base_accessor(struct gic_chip_data *data, #else #define gic_data_dist_base(d) ((d)->dist_base.common_base) #define gic_data_cpu_base(d) ((d)->cpu_base.common_base) -#define gic_set_base_accessor(d,f) +#define gic_set_base_accessor(d, f) #endif static inline void __iomem *gic_dist_base(struct irq_data *d) @@ -236,7 +237,8 @@ static int gic_retrigger(struct irq_data *d) if (gic_arch_extn.irq_retrigger) return gic_arch_extn.irq_retrigger(d); - return -ENXIO; + /* the genirq layer expects 0 if we can't retrigger in hardware */ + return 0; } #ifdef CONFIG_SMP @@ -323,7 +325,7 @@ static void gic_handle_cascade_irq(unsigned int irq, struct irq_desc *desc) cascade_irq = irq_find_mapping(chip_data->domain, gic_irq); if (unlikely(gic_irq < 32 || gic_irq > 1020)) - do_bad_IRQ(cascade_irq, desc); + handle_bad_irq(cascade_irq, desc); else generic_handle_irq(cascade_irq); @@ -699,6 +701,25 @@ static int gic_irq_domain_xlate(struct irq_domain *d, return 0; } +#ifdef CONFIG_SMP +static int __cpuinit gic_secondary_init(struct notifier_block *nfb, + unsigned long action, void *hcpu) +{ + if (action == CPU_STARTING) + gic_cpu_init(&gic_data[0]); + return NOTIFY_OK; +} + +/* + * Notifier for enabling the GIC CPU interface. Set an arbitrarily high + * priority because the GIC needs to be up before the ARM generic timers. + */ +static struct notifier_block __cpuinitdata gic_cpu_notifier = { + .notifier_call = gic_secondary_init, + .priority = 100, +}; +#endif + const struct irq_domain_ops gic_irq_domain_ops = { .map = gic_irq_domain_map, .xlate = gic_irq_domain_xlate, @@ -789,6 +810,7 @@ void __init gic_init_bases(unsigned int gic_nr, int irq_start, #ifdef CONFIG_SMP set_smp_cross_call(gic_raise_softirq); + register_cpu_notifier(&gic_cpu_notifier); #endif set_handle_irq(gic_handle_irq); @@ -799,15 +821,8 @@ void __init gic_init_bases(unsigned int gic_nr, int irq_start, gic_pm_init(gic); } -void __cpuinit gic_secondary_init(unsigned int gic_nr) -{ - BUG_ON(gic_nr >= MAX_GIC_NR); - - gic_cpu_init(&gic_data[gic_nr]); -} - #ifdef CONFIG_OF -static int gic_cnt __initdata = 0; +static int gic_cnt __initdata; int __init gic_of_init(struct device_node *node, struct device_node *parent) { diff --git a/drivers/irqchip/irq-mxs.c b/drivers/irqchip/irq-mxs.c new file mode 100644 index 000000000000..29889bbdcc6d --- /dev/null +++ b/drivers/irqchip/irq-mxs.c @@ -0,0 +1,121 @@ +/* + * Copyright (C) 2009-2010 Freescale Semiconductor, Inc. All Rights Reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + */ + +#include <linux/kernel.h> +#include <linux/init.h> +#include <linux/irq.h> +#include <linux/irqdomain.h> +#include <linux/io.h> +#include <linux/of.h> +#include <linux/of_address.h> +#include <linux/of_irq.h> +#include <linux/stmp_device.h> +#include <asm/exception.h> + +#include "irqchip.h" + +#define HW_ICOLL_VECTOR 0x0000 +#define HW_ICOLL_LEVELACK 0x0010 +#define HW_ICOLL_CTRL 0x0020 +#define HW_ICOLL_STAT_OFFSET 0x0070 +#define HW_ICOLL_INTERRUPTn_SET(n) (0x0124 + (n) * 0x10) +#define HW_ICOLL_INTERRUPTn_CLR(n) (0x0128 + (n) * 0x10) +#define BM_ICOLL_INTERRUPTn_ENABLE 0x00000004 +#define BV_ICOLL_LEVELACK_IRQLEVELACK__LEVEL0 0x1 + +#define ICOLL_NUM_IRQS 128 + +static void __iomem *icoll_base; +static struct irq_domain *icoll_domain; + +static void icoll_ack_irq(struct irq_data *d) +{ + /* + * The Interrupt Collector is able to prioritize irqs. + * Currently only level 0 is used. So acking can use + * BV_ICOLL_LEVELACK_IRQLEVELACK__LEVEL0 unconditionally. + */ + __raw_writel(BV_ICOLL_LEVELACK_IRQLEVELACK__LEVEL0, + icoll_base + HW_ICOLL_LEVELACK); +} + +static void icoll_mask_irq(struct irq_data *d) +{ + __raw_writel(BM_ICOLL_INTERRUPTn_ENABLE, + icoll_base + HW_ICOLL_INTERRUPTn_CLR(d->hwirq)); +} + +static void icoll_unmask_irq(struct irq_data *d) +{ + __raw_writel(BM_ICOLL_INTERRUPTn_ENABLE, + icoll_base + HW_ICOLL_INTERRUPTn_SET(d->hwirq)); +} + +static struct irq_chip mxs_icoll_chip = { + .irq_ack = icoll_ack_irq, + .irq_mask = icoll_mask_irq, + .irq_unmask = icoll_unmask_irq, +}; + +asmlinkage void __exception_irq_entry icoll_handle_irq(struct pt_regs *regs) +{ + u32 irqnr; + + do { + irqnr = __raw_readl(icoll_base + HW_ICOLL_STAT_OFFSET); + if (irqnr != 0x7f) { + __raw_writel(irqnr, icoll_base + HW_ICOLL_VECTOR); + irqnr = irq_find_mapping(icoll_domain, irqnr); + handle_IRQ(irqnr, regs); + continue; + } + break; + } while (1); +} + +static int icoll_irq_domain_map(struct irq_domain *d, unsigned int virq, + irq_hw_number_t hw) +{ + irq_set_chip_and_handler(virq, &mxs_icoll_chip, handle_level_irq); + set_irq_flags(virq, IRQF_VALID); + + return 0; +} + +static struct irq_domain_ops icoll_irq_domain_ops = { + .map = icoll_irq_domain_map, + .xlate = irq_domain_xlate_onecell, +}; + +static void __init icoll_of_init(struct device_node *np, + struct device_node *interrupt_parent) +{ + icoll_base = of_iomap(np, 0); + WARN_ON(!icoll_base); + + /* + * Interrupt Collector reset, which initializes the priority + * for each irq to level 0. + */ + stmp_reset_block(icoll_base + HW_ICOLL_CTRL); + + icoll_domain = irq_domain_add_linear(np, ICOLL_NUM_IRQS, + &icoll_irq_domain_ops, NULL); + WARN_ON(!icoll_domain); +} +IRQCHIP_DECLARE(mxs, "fsl,icoll", icoll_of_init); diff --git a/drivers/irqchip/irq-renesas-intc-irqpin.c b/drivers/irqchip/irq-renesas-intc-irqpin.c new file mode 100644 index 000000000000..5a68e5accec1 --- /dev/null +++ b/drivers/irqchip/irq-renesas-intc-irqpin.c @@ -0,0 +1,547 @@ +/* + * Renesas INTC External IRQ Pin Driver + * + * Copyright (C) 2013 Magnus Damm + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ + +#include <linux/init.h> +#include <linux/platform_device.h> +#include <linux/spinlock.h> +#include <linux/interrupt.h> +#include <linux/ioport.h> +#include <linux/io.h> +#include <linux/irq.h> +#include <linux/irqdomain.h> +#include <linux/err.h> +#include <linux/slab.h> +#include <linux/module.h> +#include <linux/platform_data/irq-renesas-intc-irqpin.h> + +#define INTC_IRQPIN_MAX 8 /* maximum 8 interrupts per driver instance */ + +#define INTC_IRQPIN_REG_SENSE 0 /* ICRn */ +#define INTC_IRQPIN_REG_PRIO 1 /* INTPRInn */ +#define INTC_IRQPIN_REG_SOURCE 2 /* INTREQnn */ +#define INTC_IRQPIN_REG_MASK 3 /* INTMSKnn */ +#define INTC_IRQPIN_REG_CLEAR 4 /* INTMSKCLRnn */ +#define INTC_IRQPIN_REG_NR 5 + +/* INTC external IRQ PIN hardware register access: + * + * SENSE is read-write 32-bit with 2-bits or 4-bits per IRQ (*) + * PRIO is read-write 32-bit with 4-bits per IRQ (**) + * SOURCE is read-only 32-bit or 8-bit with 1-bit per IRQ (***) + * MASK is write-only 32-bit or 8-bit with 1-bit per IRQ (***) + * CLEAR is write-only 32-bit or 8-bit with 1-bit per IRQ (***) + * + * (*) May be accessed by more than one driver instance - lock needed + * (**) Read-modify-write access by one driver instance - lock needed + * (***) Accessed by one driver instance only - no locking needed + */ + +struct intc_irqpin_iomem { + void __iomem *iomem; + unsigned long (*read)(void __iomem *iomem); + void (*write)(void __iomem *iomem, unsigned long data); + int width; +}; + +struct intc_irqpin_irq { + int hw_irq; + int requested_irq; + int domain_irq; + struct intc_irqpin_priv *p; +}; + +struct intc_irqpin_priv { + struct intc_irqpin_iomem iomem[INTC_IRQPIN_REG_NR]; + struct intc_irqpin_irq irq[INTC_IRQPIN_MAX]; + struct renesas_intc_irqpin_config config; + unsigned int number_of_irqs; + struct platform_device *pdev; + struct irq_chip irq_chip; + struct irq_domain *irq_domain; + bool shared_irqs; + u8 shared_irq_mask; +}; + +static unsigned long intc_irqpin_read32(void __iomem *iomem) +{ + return ioread32(iomem); +} + +static unsigned long intc_irqpin_read8(void __iomem *iomem) +{ + return ioread8(iomem); +} + +static void intc_irqpin_write32(void __iomem *iomem, unsigned long data) +{ + iowrite32(data, iomem); +} + +static void intc_irqpin_write8(void __iomem *iomem, unsigned long data) +{ + iowrite8(data, iomem); +} + +static inline unsigned long intc_irqpin_read(struct intc_irqpin_priv *p, + int reg) +{ + struct intc_irqpin_iomem *i = &p->iomem[reg]; + + return i->read(i->iomem); +} + +static inline void intc_irqpin_write(struct intc_irqpin_priv *p, + int reg, unsigned long data) +{ + struct intc_irqpin_iomem *i = &p->iomem[reg]; + + i->write(i->iomem, data); +} + +static inline unsigned long intc_irqpin_hwirq_mask(struct intc_irqpin_priv *p, + int reg, int hw_irq) +{ + return BIT((p->iomem[reg].width - 1) - hw_irq); +} + +static inline void intc_irqpin_irq_write_hwirq(struct intc_irqpin_priv *p, + int reg, int hw_irq) +{ + intc_irqpin_write(p, reg, intc_irqpin_hwirq_mask(p, reg, hw_irq)); +} + +static DEFINE_RAW_SPINLOCK(intc_irqpin_lock); /* only used by slow path */ + +static void intc_irqpin_read_modify_write(struct intc_irqpin_priv *p, + int reg, int shift, + int width, int value) +{ + unsigned long flags; + unsigned long tmp; + + raw_spin_lock_irqsave(&intc_irqpin_lock, flags); + + tmp = intc_irqpin_read(p, reg); + tmp &= ~(((1 << width) - 1) << shift); + tmp |= value << shift; + intc_irqpin_write(p, reg, tmp); + + raw_spin_unlock_irqrestore(&intc_irqpin_lock, flags); +} + +static void intc_irqpin_mask_unmask_prio(struct intc_irqpin_priv *p, + int irq, int do_mask) +{ + int bitfield_width = 4; /* PRIO assumed to have fixed bitfield width */ + int shift = (7 - irq) * bitfield_width; /* PRIO assumed to be 32-bit */ + + intc_irqpin_read_modify_write(p, INTC_IRQPIN_REG_PRIO, + shift, bitfield_width, + do_mask ? 0 : (1 << bitfield_width) - 1); +} + +static int intc_irqpin_set_sense(struct intc_irqpin_priv *p, int irq, int value) +{ + int bitfield_width = p->config.sense_bitfield_width; + int shift = (7 - irq) * bitfield_width; /* SENSE assumed to be 32-bit */ + + dev_dbg(&p->pdev->dev, "sense irq = %d, mode = %d\n", irq, value); + + if (value >= (1 << bitfield_width)) + return -EINVAL; + + intc_irqpin_read_modify_write(p, INTC_IRQPIN_REG_SENSE, shift, + bitfield_width, value); + return 0; +} + +static void intc_irqpin_dbg(struct intc_irqpin_irq *i, char *str) +{ + dev_dbg(&i->p->pdev->dev, "%s (%d:%d:%d)\n", + str, i->requested_irq, i->hw_irq, i->domain_irq); +} + +static void intc_irqpin_irq_enable(struct irq_data *d) +{ + struct intc_irqpin_priv *p = irq_data_get_irq_chip_data(d); + int hw_irq = irqd_to_hwirq(d); + + intc_irqpin_dbg(&p->irq[hw_irq], "enable"); + intc_irqpin_irq_write_hwirq(p, INTC_IRQPIN_REG_CLEAR, hw_irq); +} + +static void intc_irqpin_irq_disable(struct irq_data *d) +{ + struct intc_irqpin_priv *p = irq_data_get_irq_chip_data(d); + int hw_irq = irqd_to_hwirq(d); + + intc_irqpin_dbg(&p->irq[hw_irq], "disable"); + intc_irqpin_irq_write_hwirq(p, INTC_IRQPIN_REG_MASK, hw_irq); +} + +static void intc_irqpin_shared_irq_enable(struct irq_data *d) +{ + struct intc_irqpin_priv *p = irq_data_get_irq_chip_data(d); + int hw_irq = irqd_to_hwirq(d); + + intc_irqpin_dbg(&p->irq[hw_irq], "shared enable"); + intc_irqpin_irq_write_hwirq(p, INTC_IRQPIN_REG_CLEAR, hw_irq); + + p->shared_irq_mask &= ~BIT(hw_irq); +} + +static void intc_irqpin_shared_irq_disable(struct irq_data *d) +{ + struct intc_irqpin_priv *p = irq_data_get_irq_chip_data(d); + int hw_irq = irqd_to_hwirq(d); + + intc_irqpin_dbg(&p->irq[hw_irq], "shared disable"); + intc_irqpin_irq_write_hwirq(p, INTC_IRQPIN_REG_MASK, hw_irq); + + p->shared_irq_mask |= BIT(hw_irq); +} + +static void intc_irqpin_irq_enable_force(struct irq_data *d) +{ + struct intc_irqpin_priv *p = irq_data_get_irq_chip_data(d); + int irq = p->irq[irqd_to_hwirq(d)].requested_irq; + + intc_irqpin_irq_enable(d); + + /* enable interrupt through parent interrupt controller, + * assumes non-shared interrupt with 1:1 mapping + * needed for busted IRQs on some SoCs like sh73a0 + */ + irq_get_chip(irq)->irq_unmask(irq_get_irq_data(irq)); +} + +static void intc_irqpin_irq_disable_force(struct irq_data *d) +{ + struct intc_irqpin_priv *p = irq_data_get_irq_chip_data(d); + int irq = p->irq[irqd_to_hwirq(d)].requested_irq; + + /* disable interrupt through parent interrupt controller, + * assumes non-shared interrupt with 1:1 mapping + * needed for busted IRQs on some SoCs like sh73a0 + */ + irq_get_chip(irq)->irq_mask(irq_get_irq_data(irq)); + intc_irqpin_irq_disable(d); +} + +#define INTC_IRQ_SENSE_VALID 0x10 +#define INTC_IRQ_SENSE(x) (x + INTC_IRQ_SENSE_VALID) + +static unsigned char intc_irqpin_sense[IRQ_TYPE_SENSE_MASK + 1] = { + [IRQ_TYPE_EDGE_FALLING] = INTC_IRQ_SENSE(0x00), + [IRQ_TYPE_EDGE_RISING] = INTC_IRQ_SENSE(0x01), + [IRQ_TYPE_LEVEL_LOW] = INTC_IRQ_SENSE(0x02), + [IRQ_TYPE_LEVEL_HIGH] = INTC_IRQ_SENSE(0x03), + [IRQ_TYPE_EDGE_BOTH] = INTC_IRQ_SENSE(0x04), +}; + +static int intc_irqpin_irq_set_type(struct irq_data *d, unsigned int type) +{ + unsigned char value = intc_irqpin_sense[type & IRQ_TYPE_SENSE_MASK]; + struct intc_irqpin_priv *p = irq_data_get_irq_chip_data(d); + + if (!(value & INTC_IRQ_SENSE_VALID)) + return -EINVAL; + + return intc_irqpin_set_sense(p, irqd_to_hwirq(d), + value ^ INTC_IRQ_SENSE_VALID); +} + +static irqreturn_t intc_irqpin_irq_handler(int irq, void *dev_id) +{ + struct intc_irqpin_irq *i = dev_id; + struct intc_irqpin_priv *p = i->p; + unsigned long bit; + + intc_irqpin_dbg(i, "demux1"); + bit = intc_irqpin_hwirq_mask(p, INTC_IRQPIN_REG_SOURCE, i->hw_irq); + + if (intc_irqpin_read(p, INTC_IRQPIN_REG_SOURCE) & bit) { + intc_irqpin_write(p, INTC_IRQPIN_REG_SOURCE, ~bit); + intc_irqpin_dbg(i, "demux2"); + generic_handle_irq(i->domain_irq); + return IRQ_HANDLED; + } + return IRQ_NONE; +} + +static irqreturn_t intc_irqpin_shared_irq_handler(int irq, void *dev_id) +{ + struct intc_irqpin_priv *p = dev_id; + unsigned int reg_source = intc_irqpin_read(p, INTC_IRQPIN_REG_SOURCE); + irqreturn_t status = IRQ_NONE; + int k; + + for (k = 0; k < 8; k++) { + if (reg_source & BIT(7 - k)) { + if (BIT(k) & p->shared_irq_mask) + continue; + + status |= intc_irqpin_irq_handler(irq, &p->irq[k]); + } + } + + return status; +} + +static int intc_irqpin_irq_domain_map(struct irq_domain *h, unsigned int virq, + irq_hw_number_t hw) +{ + struct intc_irqpin_priv *p = h->host_data; + + p->irq[hw].domain_irq = virq; + p->irq[hw].hw_irq = hw; + + intc_irqpin_dbg(&p->irq[hw], "map"); + irq_set_chip_data(virq, h->host_data); + irq_set_chip_and_handler(virq, &p->irq_chip, handle_level_irq); + set_irq_flags(virq, IRQF_VALID); /* kill me now */ + return 0; +} + +static struct irq_domain_ops intc_irqpin_irq_domain_ops = { + .map = intc_irqpin_irq_domain_map, + .xlate = irq_domain_xlate_twocell, +}; + +static int intc_irqpin_probe(struct platform_device *pdev) +{ + struct renesas_intc_irqpin_config *pdata = pdev->dev.platform_data; + struct intc_irqpin_priv *p; + struct intc_irqpin_iomem *i; + struct resource *io[INTC_IRQPIN_REG_NR]; + struct resource *irq; + struct irq_chip *irq_chip; + void (*enable_fn)(struct irq_data *d); + void (*disable_fn)(struct irq_data *d); + const char *name = dev_name(&pdev->dev); + int ref_irq; + int ret; + int k; + + p = devm_kzalloc(&pdev->dev, sizeof(*p), GFP_KERNEL); + if (!p) { + dev_err(&pdev->dev, "failed to allocate driver data\n"); + ret = -ENOMEM; + goto err0; + } + + /* deal with driver instance configuration */ + if (pdata) + memcpy(&p->config, pdata, sizeof(*pdata)); + if (!p->config.sense_bitfield_width) + p->config.sense_bitfield_width = 4; /* default to 4 bits */ + + p->pdev = pdev; + platform_set_drvdata(pdev, p); + + /* get hold of manadatory IOMEM */ + for (k = 0; k < INTC_IRQPIN_REG_NR; k++) { + io[k] = platform_get_resource(pdev, IORESOURCE_MEM, k); + if (!io[k]) { + dev_err(&pdev->dev, "not enough IOMEM resources\n"); + ret = -EINVAL; + goto err0; + } + } + + /* allow any number of IRQs between 1 and INTC_IRQPIN_MAX */ + for (k = 0; k < INTC_IRQPIN_MAX; k++) { + irq = platform_get_resource(pdev, IORESOURCE_IRQ, k); + if (!irq) + break; + + p->irq[k].p = p; + p->irq[k].requested_irq = irq->start; + } + + p->number_of_irqs = k; + if (p->number_of_irqs < 1) { + dev_err(&pdev->dev, "not enough IRQ resources\n"); + ret = -EINVAL; + goto err0; + } + + /* ioremap IOMEM and setup read/write callbacks */ + for (k = 0; k < INTC_IRQPIN_REG_NR; k++) { + i = &p->iomem[k]; + + switch (resource_size(io[k])) { + case 1: + i->width = 8; + i->read = intc_irqpin_read8; + i->write = intc_irqpin_write8; + break; + case 4: + i->width = 32; + i->read = intc_irqpin_read32; + i->write = intc_irqpin_write32; + break; + default: + dev_err(&pdev->dev, "IOMEM size mismatch\n"); + ret = -EINVAL; + goto err0; + } + + i->iomem = devm_ioremap_nocache(&pdev->dev, io[k]->start, + resource_size(io[k])); + if (!i->iomem) { + dev_err(&pdev->dev, "failed to remap IOMEM\n"); + ret = -ENXIO; + goto err0; + } + } + + /* mask all interrupts using priority */ + for (k = 0; k < p->number_of_irqs; k++) + intc_irqpin_mask_unmask_prio(p, k, 1); + + /* clear all pending interrupts */ + intc_irqpin_write(p, INTC_IRQPIN_REG_SOURCE, 0x0); + + /* scan for shared interrupt lines */ + ref_irq = p->irq[0].requested_irq; + p->shared_irqs = true; + for (k = 1; k < p->number_of_irqs; k++) { + if (ref_irq != p->irq[k].requested_irq) { + p->shared_irqs = false; + break; + } + } + + /* use more severe masking method if requested */ + if (p->config.control_parent) { + enable_fn = intc_irqpin_irq_enable_force; + disable_fn = intc_irqpin_irq_disable_force; + } else if (!p->shared_irqs) { + enable_fn = intc_irqpin_irq_enable; + disable_fn = intc_irqpin_irq_disable; + } else { + enable_fn = intc_irqpin_shared_irq_enable; + disable_fn = intc_irqpin_shared_irq_disable; + } + + irq_chip = &p->irq_chip; + irq_chip->name = name; + irq_chip->irq_mask = disable_fn; + irq_chip->irq_unmask = enable_fn; + irq_chip->irq_enable = enable_fn; + irq_chip->irq_disable = disable_fn; + irq_chip->irq_set_type = intc_irqpin_irq_set_type; + irq_chip->flags = IRQCHIP_SKIP_SET_WAKE; + + p->irq_domain = irq_domain_add_simple(pdev->dev.of_node, + p->number_of_irqs, + p->config.irq_base, + &intc_irqpin_irq_domain_ops, p); + if (!p->irq_domain) { + ret = -ENXIO; + dev_err(&pdev->dev, "cannot initialize irq domain\n"); + goto err0; + } + + if (p->shared_irqs) { + /* request one shared interrupt */ + if (devm_request_irq(&pdev->dev, p->irq[0].requested_irq, + intc_irqpin_shared_irq_handler, + IRQF_SHARED, name, p)) { + dev_err(&pdev->dev, "failed to request low IRQ\n"); + ret = -ENOENT; + goto err1; + } + } else { + /* request interrupts one by one */ + for (k = 0; k < p->number_of_irqs; k++) { + if (devm_request_irq(&pdev->dev, + p->irq[k].requested_irq, + intc_irqpin_irq_handler, + 0, name, &p->irq[k])) { + dev_err(&pdev->dev, + "failed to request low IRQ\n"); + ret = -ENOENT; + goto err1; + } + } + } + + /* unmask all interrupts on prio level */ + for (k = 0; k < p->number_of_irqs; k++) + intc_irqpin_mask_unmask_prio(p, k, 0); + + dev_info(&pdev->dev, "driving %d irqs\n", p->number_of_irqs); + + /* warn in case of mismatch if irq base is specified */ + if (p->config.irq_base) { + if (p->config.irq_base != p->irq[0].domain_irq) + dev_warn(&pdev->dev, "irq base mismatch (%d/%d)\n", + p->config.irq_base, p->irq[0].domain_irq); + } + + return 0; + +err1: + irq_domain_remove(p->irq_domain); +err0: + return ret; +} + +static int intc_irqpin_remove(struct platform_device *pdev) +{ + struct intc_irqpin_priv *p = platform_get_drvdata(pdev); + + irq_domain_remove(p->irq_domain); + + return 0; +} + +static const struct of_device_id intc_irqpin_dt_ids[] = { + { .compatible = "renesas,intc-irqpin", }, + {}, +}; +MODULE_DEVICE_TABLE(of, intc_irqpin_dt_ids); + +static struct platform_driver intc_irqpin_device_driver = { + .probe = intc_irqpin_probe, + .remove = intc_irqpin_remove, + .driver = { + .name = "renesas_intc_irqpin", + .of_match_table = intc_irqpin_dt_ids, + .owner = THIS_MODULE, + } +}; + +static int __init intc_irqpin_init(void) +{ + return platform_driver_register(&intc_irqpin_device_driver); +} +postcore_initcall(intc_irqpin_init); + +static void __exit intc_irqpin_exit(void) +{ + platform_driver_unregister(&intc_irqpin_device_driver); +} +module_exit(intc_irqpin_exit); + +MODULE_AUTHOR("Magnus Damm"); +MODULE_DESCRIPTION("Renesas INTC External IRQ Pin Driver"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/irqchip/irq-renesas-irqc.c b/drivers/irqchip/irq-renesas-irqc.c new file mode 100644 index 000000000000..927bff373aac --- /dev/null +++ b/drivers/irqchip/irq-renesas-irqc.c @@ -0,0 +1,307 @@ +/* + * Renesas IRQC Driver + * + * Copyright (C) 2013 Magnus Damm + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ + +#include <linux/init.h> +#include <linux/platform_device.h> +#include <linux/spinlock.h> +#include <linux/interrupt.h> +#include <linux/ioport.h> +#include <linux/io.h> +#include <linux/irq.h> +#include <linux/irqdomain.h> +#include <linux/err.h> +#include <linux/slab.h> +#include <linux/module.h> +#include <linux/platform_data/irq-renesas-irqc.h> + +#define IRQC_IRQ_MAX 32 /* maximum 32 interrupts per driver instance */ + +#define IRQC_REQ_STS 0x00 +#define IRQC_EN_STS 0x04 +#define IRQC_EN_SET 0x08 +#define IRQC_INT_CPU_BASE(n) (0x000 + ((n) * 0x10)) +#define DETECT_STATUS 0x100 +#define IRQC_CONFIG(n) (0x180 + ((n) * 0x04)) + +struct irqc_irq { + int hw_irq; + int requested_irq; + int domain_irq; + struct irqc_priv *p; +}; + +struct irqc_priv { + void __iomem *iomem; + void __iomem *cpu_int_base; + struct irqc_irq irq[IRQC_IRQ_MAX]; + struct renesas_irqc_config config; + unsigned int number_of_irqs; + struct platform_device *pdev; + struct irq_chip irq_chip; + struct irq_domain *irq_domain; +}; + +static void irqc_dbg(struct irqc_irq *i, char *str) +{ + dev_dbg(&i->p->pdev->dev, "%s (%d:%d:%d)\n", + str, i->requested_irq, i->hw_irq, i->domain_irq); +} + +static void irqc_irq_enable(struct irq_data *d) +{ + struct irqc_priv *p = irq_data_get_irq_chip_data(d); + int hw_irq = irqd_to_hwirq(d); + + irqc_dbg(&p->irq[hw_irq], "enable"); + iowrite32(BIT(hw_irq), p->cpu_int_base + IRQC_EN_SET); +} + +static void irqc_irq_disable(struct irq_data *d) +{ + struct irqc_priv *p = irq_data_get_irq_chip_data(d); + int hw_irq = irqd_to_hwirq(d); + + irqc_dbg(&p->irq[hw_irq], "disable"); + iowrite32(BIT(hw_irq), p->cpu_int_base + IRQC_EN_STS); +} + +#define INTC_IRQ_SENSE_VALID 0x10 +#define INTC_IRQ_SENSE(x) (x + INTC_IRQ_SENSE_VALID) + +static unsigned char irqc_sense[IRQ_TYPE_SENSE_MASK + 1] = { + [IRQ_TYPE_LEVEL_LOW] = INTC_IRQ_SENSE(0x01), + [IRQ_TYPE_LEVEL_HIGH] = INTC_IRQ_SENSE(0x02), + [IRQ_TYPE_EDGE_FALLING] = INTC_IRQ_SENSE(0x04), /* Synchronous */ + [IRQ_TYPE_EDGE_RISING] = INTC_IRQ_SENSE(0x08), /* Synchronous */ + [IRQ_TYPE_EDGE_BOTH] = INTC_IRQ_SENSE(0x0c), /* Synchronous */ +}; + +static int irqc_irq_set_type(struct irq_data *d, unsigned int type) +{ + struct irqc_priv *p = irq_data_get_irq_chip_data(d); + int hw_irq = irqd_to_hwirq(d); + unsigned char value = irqc_sense[type & IRQ_TYPE_SENSE_MASK]; + unsigned long tmp; + + irqc_dbg(&p->irq[hw_irq], "sense"); + + if (!(value & INTC_IRQ_SENSE_VALID)) + return -EINVAL; + + tmp = ioread32(p->iomem + IRQC_CONFIG(hw_irq)); + tmp &= ~0x3f; + tmp |= value ^ INTC_IRQ_SENSE_VALID; + iowrite32(tmp, p->iomem + IRQC_CONFIG(hw_irq)); + return 0; +} + +static irqreturn_t irqc_irq_handler(int irq, void *dev_id) +{ + struct irqc_irq *i = dev_id; + struct irqc_priv *p = i->p; + unsigned long bit = BIT(i->hw_irq); + + irqc_dbg(i, "demux1"); + + if (ioread32(p->iomem + DETECT_STATUS) & bit) { + iowrite32(bit, p->iomem + DETECT_STATUS); + irqc_dbg(i, "demux2"); + generic_handle_irq(i->domain_irq); + return IRQ_HANDLED; + } + return IRQ_NONE; +} + +static int irqc_irq_domain_map(struct irq_domain *h, unsigned int virq, + irq_hw_number_t hw) +{ + struct irqc_priv *p = h->host_data; + + p->irq[hw].domain_irq = virq; + p->irq[hw].hw_irq = hw; + + irqc_dbg(&p->irq[hw], "map"); + irq_set_chip_data(virq, h->host_data); + irq_set_chip_and_handler(virq, &p->irq_chip, handle_level_irq); + set_irq_flags(virq, IRQF_VALID); /* kill me now */ + return 0; +} + +static struct irq_domain_ops irqc_irq_domain_ops = { + .map = irqc_irq_domain_map, + .xlate = irq_domain_xlate_twocell, +}; + +static int irqc_probe(struct platform_device *pdev) +{ + struct renesas_irqc_config *pdata = pdev->dev.platform_data; + struct irqc_priv *p; + struct resource *io; + struct resource *irq; + struct irq_chip *irq_chip; + const char *name = dev_name(&pdev->dev); + int ret; + int k; + + p = kzalloc(sizeof(*p), GFP_KERNEL); + if (!p) { + dev_err(&pdev->dev, "failed to allocate driver data\n"); + ret = -ENOMEM; + goto err0; + } + + /* deal with driver instance configuration */ + if (pdata) + memcpy(&p->config, pdata, sizeof(*pdata)); + + p->pdev = pdev; + platform_set_drvdata(pdev, p); + + /* get hold of manadatory IOMEM */ + io = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!io) { + dev_err(&pdev->dev, "not enough IOMEM resources\n"); + ret = -EINVAL; + goto err1; + } + + /* allow any number of IRQs between 1 and IRQC_IRQ_MAX */ + for (k = 0; k < IRQC_IRQ_MAX; k++) { + irq = platform_get_resource(pdev, IORESOURCE_IRQ, k); + if (!irq) + break; + + p->irq[k].p = p; + p->irq[k].requested_irq = irq->start; + } + + p->number_of_irqs = k; + if (p->number_of_irqs < 1) { + dev_err(&pdev->dev, "not enough IRQ resources\n"); + ret = -EINVAL; + goto err1; + } + + /* ioremap IOMEM and setup read/write callbacks */ + p->iomem = ioremap_nocache(io->start, resource_size(io)); + if (!p->iomem) { + dev_err(&pdev->dev, "failed to remap IOMEM\n"); + ret = -ENXIO; + goto err2; + } + + p->cpu_int_base = p->iomem + IRQC_INT_CPU_BASE(0); /* SYS-SPI */ + + irq_chip = &p->irq_chip; + irq_chip->name = name; + irq_chip->irq_mask = irqc_irq_disable; + irq_chip->irq_unmask = irqc_irq_enable; + irq_chip->irq_enable = irqc_irq_enable; + irq_chip->irq_disable = irqc_irq_disable; + irq_chip->irq_set_type = irqc_irq_set_type; + irq_chip->flags = IRQCHIP_SKIP_SET_WAKE; + + p->irq_domain = irq_domain_add_simple(pdev->dev.of_node, + p->number_of_irqs, + p->config.irq_base, + &irqc_irq_domain_ops, p); + if (!p->irq_domain) { + ret = -ENXIO; + dev_err(&pdev->dev, "cannot initialize irq domain\n"); + goto err2; + } + + /* request interrupts one by one */ + for (k = 0; k < p->number_of_irqs; k++) { + if (request_irq(p->irq[k].requested_irq, irqc_irq_handler, + 0, name, &p->irq[k])) { + dev_err(&pdev->dev, "failed to request IRQ\n"); + ret = -ENOENT; + goto err3; + } + } + + dev_info(&pdev->dev, "driving %d irqs\n", p->number_of_irqs); + + /* warn in case of mismatch if irq base is specified */ + if (p->config.irq_base) { + if (p->config.irq_base != p->irq[0].domain_irq) + dev_warn(&pdev->dev, "irq base mismatch (%d/%d)\n", + p->config.irq_base, p->irq[0].domain_irq); + } + + return 0; +err3: + for (; k >= 0; k--) + free_irq(p->irq[k - 1].requested_irq, &p->irq[k - 1]); + + irq_domain_remove(p->irq_domain); +err2: + iounmap(p->iomem); +err1: + kfree(p); +err0: + return ret; +} + +static int irqc_remove(struct platform_device *pdev) +{ + struct irqc_priv *p = platform_get_drvdata(pdev); + int k; + + for (k = 0; k < p->number_of_irqs; k++) + free_irq(p->irq[k].requested_irq, &p->irq[k]); + + irq_domain_remove(p->irq_domain); + iounmap(p->iomem); + kfree(p); + return 0; +} + +static const struct of_device_id irqc_dt_ids[] = { + { .compatible = "renesas,irqc", }, + {}, +}; +MODULE_DEVICE_TABLE(of, irqc_dt_ids); + +static struct platform_driver irqc_device_driver = { + .probe = irqc_probe, + .remove = irqc_remove, + .driver = { + .name = "renesas_irqc", + .of_match_table = irqc_dt_ids, + .owner = THIS_MODULE, + } +}; + +static int __init irqc_init(void) +{ + return platform_driver_register(&irqc_device_driver); +} +postcore_initcall(irqc_init); + +static void __exit irqc_exit(void) +{ + platform_driver_unregister(&irqc_device_driver); +} +module_exit(irqc_exit); + +MODULE_AUTHOR("Magnus Damm"); +MODULE_DESCRIPTION("Renesas IRQC Driver"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/irqchip/irq-s3c24xx.c b/drivers/irqchip/irq-s3c24xx.c new file mode 100644 index 000000000000..bbcc944ed94f --- /dev/null +++ b/drivers/irqchip/irq-s3c24xx.c @@ -0,0 +1,1356 @@ +/* + * S3C24XX IRQ handling + * + * Copyright (c) 2003-2004 Simtec Electronics + * Ben Dooks <ben@simtec.co.uk> + * Copyright (c) 2012 Heiko Stuebner <heiko@sntech.de> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. +*/ + +#include <linux/init.h> +#include <linux/slab.h> +#include <linux/module.h> +#include <linux/io.h> +#include <linux/err.h> +#include <linux/interrupt.h> +#include <linux/ioport.h> +#include <linux/device.h> +#include <linux/irqdomain.h> +#include <linux/irqchip/chained_irq.h> +#include <linux/of.h> +#include <linux/of_irq.h> +#include <linux/of_address.h> + +#include <asm/exception.h> +#include <asm/mach/irq.h> + +#include <mach/regs-irq.h> +#include <mach/regs-gpio.h> + +#include <plat/cpu.h> +#include <plat/regs-irqtype.h> +#include <plat/pm.h> + +#include "irqchip.h" + +#define S3C_IRQTYPE_NONE 0 +#define S3C_IRQTYPE_EINT 1 +#define S3C_IRQTYPE_EDGE 2 +#define S3C_IRQTYPE_LEVEL 3 + +struct s3c_irq_data { + unsigned int type; + unsigned long offset; + unsigned long parent_irq; + + /* data gets filled during init */ + struct s3c_irq_intc *intc; + unsigned long sub_bits; + struct s3c_irq_intc *sub_intc; +}; + +/* + * Sructure holding the controller data + * @reg_pending register holding pending irqs + * @reg_intpnd special register intpnd in main intc + * @reg_mask mask register + * @domain irq_domain of the controller + * @parent parent controller for ext and sub irqs + * @irqs irq-data, always s3c_irq_data[32] + */ +struct s3c_irq_intc { + void __iomem *reg_pending; + void __iomem *reg_intpnd; + void __iomem *reg_mask; + struct irq_domain *domain; + struct s3c_irq_intc *parent; + struct s3c_irq_data *irqs; +}; + +/* + * Array holding pointers to the global controller structs + * [0] ... main_intc + * [1] ... sub_intc + * [2] ... main_intc2 on s3c2416 + */ +static struct s3c_irq_intc *s3c_intc[3]; + +static void s3c_irq_mask(struct irq_data *data) +{ + struct s3c_irq_data *irq_data = irq_data_get_irq_chip_data(data); + struct s3c_irq_intc *intc = irq_data->intc; + struct s3c_irq_intc *parent_intc = intc->parent; + struct s3c_irq_data *parent_data; + unsigned long mask; + unsigned int irqno; + + mask = __raw_readl(intc->reg_mask); + mask |= (1UL << irq_data->offset); + __raw_writel(mask, intc->reg_mask); + + if (parent_intc) { + parent_data = &parent_intc->irqs[irq_data->parent_irq]; + + /* check to see if we need to mask the parent IRQ + * The parent_irq is always in main_intc, so the hwirq + * for find_mapping does not need an offset in any case. + */ + if ((mask & parent_data->sub_bits) == parent_data->sub_bits) { + irqno = irq_find_mapping(parent_intc->domain, + irq_data->parent_irq); + s3c_irq_mask(irq_get_irq_data(irqno)); + } + } +} + +static void s3c_irq_unmask(struct irq_data *data) +{ + struct s3c_irq_data *irq_data = irq_data_get_irq_chip_data(data); + struct s3c_irq_intc *intc = irq_data->intc; + struct s3c_irq_intc *parent_intc = intc->parent; + unsigned long mask; + unsigned int irqno; + + mask = __raw_readl(intc->reg_mask); + mask &= ~(1UL << irq_data->offset); + __raw_writel(mask, intc->reg_mask); + + if (parent_intc) { + irqno = irq_find_mapping(parent_intc->domain, + irq_data->parent_irq); + s3c_irq_unmask(irq_get_irq_data(irqno)); + } +} + +static inline void s3c_irq_ack(struct irq_data *data) +{ + struct s3c_irq_data *irq_data = irq_data_get_irq_chip_data(data); + struct s3c_irq_intc *intc = irq_data->intc; + unsigned long bitval = 1UL << irq_data->offset; + + __raw_writel(bitval, intc->reg_pending); + if (intc->reg_intpnd) + __raw_writel(bitval, intc->reg_intpnd); +} + +static int s3c_irq_type(struct irq_data *data, unsigned int type) +{ + switch (type) { + case IRQ_TYPE_NONE: + break; + case IRQ_TYPE_EDGE_RISING: + case IRQ_TYPE_EDGE_FALLING: + case IRQ_TYPE_EDGE_BOTH: + irq_set_handler(data->irq, handle_edge_irq); + break; + case IRQ_TYPE_LEVEL_LOW: + case IRQ_TYPE_LEVEL_HIGH: + irq_set_handler(data->irq, handle_level_irq); + break; + default: + pr_err("No such irq type %d", type); + return -EINVAL; + } + + return 0; +} + +static int s3c_irqext_type_set(void __iomem *gpcon_reg, + void __iomem *extint_reg, + unsigned long gpcon_offset, + unsigned long extint_offset, + unsigned int type) +{ + unsigned long newvalue = 0, value; + + /* Set the GPIO to external interrupt mode */ + value = __raw_readl(gpcon_reg); + value = (value & ~(3 << gpcon_offset)) | (0x02 << gpcon_offset); + __raw_writel(value, gpcon_reg); + + /* Set the external interrupt to pointed trigger type */ + switch (type) + { + case IRQ_TYPE_NONE: + pr_warn("No edge setting!\n"); + break; + + case IRQ_TYPE_EDGE_RISING: + newvalue = S3C2410_EXTINT_RISEEDGE; + break; + + case IRQ_TYPE_EDGE_FALLING: + newvalue = S3C2410_EXTINT_FALLEDGE; + break; + + case IRQ_TYPE_EDGE_BOTH: + newvalue = S3C2410_EXTINT_BOTHEDGE; + break; + + case IRQ_TYPE_LEVEL_LOW: + newvalue = S3C2410_EXTINT_LOWLEV; + break; + + case IRQ_TYPE_LEVEL_HIGH: + newvalue = S3C2410_EXTINT_HILEV; + break; + + default: + pr_err("No such irq type %d", type); + return -EINVAL; + } + + value = __raw_readl(extint_reg); + value = (value & ~(7 << extint_offset)) | (newvalue << extint_offset); + __raw_writel(value, extint_reg); + + return 0; +} + +static int s3c_irqext_type(struct irq_data *data, unsigned int type) +{ + void __iomem *extint_reg; + void __iomem *gpcon_reg; + unsigned long gpcon_offset, extint_offset; + + if ((data->hwirq >= 4) && (data->hwirq <= 7)) { + gpcon_reg = S3C2410_GPFCON; + extint_reg = S3C24XX_EXTINT0; + gpcon_offset = (data->hwirq) * 2; + extint_offset = (data->hwirq) * 4; + } else if ((data->hwirq >= 8) && (data->hwirq <= 15)) { + gpcon_reg = S3C2410_GPGCON; + extint_reg = S3C24XX_EXTINT1; + gpcon_offset = (data->hwirq - 8) * 2; + extint_offset = (data->hwirq - 8) * 4; + } else if ((data->hwirq >= 16) && (data->hwirq <= 23)) { + gpcon_reg = S3C2410_GPGCON; + extint_reg = S3C24XX_EXTINT2; + gpcon_offset = (data->hwirq - 8) * 2; + extint_offset = (data->hwirq - 16) * 4; + } else { + return -EINVAL; + } + + return s3c_irqext_type_set(gpcon_reg, extint_reg, gpcon_offset, + extint_offset, type); +} + +static int s3c_irqext0_type(struct irq_data *data, unsigned int type) +{ + void __iomem *extint_reg; + void __iomem *gpcon_reg; + unsigned long gpcon_offset, extint_offset; + + if ((data->hwirq >= 0) && (data->hwirq <= 3)) { + gpcon_reg = S3C2410_GPFCON; + extint_reg = S3C24XX_EXTINT0; + gpcon_offset = (data->hwirq) * 2; + extint_offset = (data->hwirq) * 4; + } else { + return -EINVAL; + } + + return s3c_irqext_type_set(gpcon_reg, extint_reg, gpcon_offset, + extint_offset, type); +} + +static struct irq_chip s3c_irq_chip = { + .name = "s3c", + .irq_ack = s3c_irq_ack, + .irq_mask = s3c_irq_mask, + .irq_unmask = s3c_irq_unmask, + .irq_set_type = s3c_irq_type, + .irq_set_wake = s3c_irq_wake +}; + +static struct irq_chip s3c_irq_level_chip = { + .name = "s3c-level", + .irq_mask = s3c_irq_mask, + .irq_unmask = s3c_irq_unmask, + .irq_ack = s3c_irq_ack, + .irq_set_type = s3c_irq_type, +}; + +static struct irq_chip s3c_irqext_chip = { + .name = "s3c-ext", + .irq_mask = s3c_irq_mask, + .irq_unmask = s3c_irq_unmask, + .irq_ack = s3c_irq_ack, + .irq_set_type = s3c_irqext_type, + .irq_set_wake = s3c_irqext_wake +}; + +static struct irq_chip s3c_irq_eint0t4 = { + .name = "s3c-ext0", + .irq_ack = s3c_irq_ack, + .irq_mask = s3c_irq_mask, + .irq_unmask = s3c_irq_unmask, + .irq_set_wake = s3c_irq_wake, + .irq_set_type = s3c_irqext0_type, +}; + +static void s3c_irq_demux(unsigned int irq, struct irq_desc *desc) +{ + struct irq_chip *chip = irq_desc_get_chip(desc); + struct s3c_irq_data *irq_data = irq_desc_get_chip_data(desc); + struct s3c_irq_intc *intc = irq_data->intc; + struct s3c_irq_intc *sub_intc = irq_data->sub_intc; + unsigned long src; + unsigned long msk; + unsigned int n; + unsigned int offset; + + /* we're using individual domains for the non-dt case + * and one big domain for the dt case where the subintc + * starts at hwirq number 32. + */ + offset = (intc->domain->of_node) ? 32 : 0; + + chained_irq_enter(chip, desc); + + src = __raw_readl(sub_intc->reg_pending); + msk = __raw_readl(sub_intc->reg_mask); + + src &= ~msk; + src &= irq_data->sub_bits; + + while (src) { + n = __ffs(src); + src &= ~(1 << n); + irq = irq_find_mapping(sub_intc->domain, offset + n); + generic_handle_irq(irq); + } + + chained_irq_exit(chip, desc); +} + +static inline int s3c24xx_handle_intc(struct s3c_irq_intc *intc, + struct pt_regs *regs, int intc_offset) +{ + int pnd; + int offset; + int irq; + + pnd = __raw_readl(intc->reg_intpnd); + if (!pnd) + return false; + + /* non-dt machines use individual domains */ + if (!intc->domain->of_node) + intc_offset = 0; + + /* We have a problem that the INTOFFSET register does not always + * show one interrupt. Occasionally we get two interrupts through + * the prioritiser, and this causes the INTOFFSET register to show + * what looks like the logical-or of the two interrupt numbers. + * + * Thanks to Klaus, Shannon, et al for helping to debug this problem + */ + offset = __raw_readl(intc->reg_intpnd + 4); + + /* Find the bit manually, when the offset is wrong. + * The pending register only ever contains the one bit of the next + * interrupt to handle. + */ + if (!(pnd & (1 << offset))) + offset = __ffs(pnd); + + irq = irq_find_mapping(intc->domain, intc_offset + offset); + handle_IRQ(irq, regs); + return true; +} + +asmlinkage void __exception_irq_entry s3c24xx_handle_irq(struct pt_regs *regs) +{ + do { + if (likely(s3c_intc[0])) + if (s3c24xx_handle_intc(s3c_intc[0], regs, 0)) + continue; + + if (s3c_intc[2]) + if (s3c24xx_handle_intc(s3c_intc[2], regs, 64)) + continue; + + break; + } while (1); +} + +#ifdef CONFIG_FIQ +/** + * s3c24xx_set_fiq - set the FIQ routing + * @irq: IRQ number to route to FIQ on processor. + * @on: Whether to route @irq to the FIQ, or to remove the FIQ routing. + * + * Change the state of the IRQ to FIQ routing depending on @irq and @on. If + * @on is true, the @irq is checked to see if it can be routed and the + * interrupt controller updated to route the IRQ. If @on is false, the FIQ + * routing is cleared, regardless of which @irq is specified. + */ +int s3c24xx_set_fiq(unsigned int irq, bool on) +{ + u32 intmod; + unsigned offs; + + if (on) { + offs = irq - FIQ_START; + if (offs > 31) + return -EINVAL; + + intmod = 1 << offs; + } else { + intmod = 0; + } + + __raw_writel(intmod, S3C2410_INTMOD); + return 0; +} + +EXPORT_SYMBOL_GPL(s3c24xx_set_fiq); +#endif + +static int s3c24xx_irq_map(struct irq_domain *h, unsigned int virq, + irq_hw_number_t hw) +{ + struct s3c_irq_intc *intc = h->host_data; + struct s3c_irq_data *irq_data = &intc->irqs[hw]; + struct s3c_irq_intc *parent_intc; + struct s3c_irq_data *parent_irq_data; + unsigned int irqno; + + /* attach controller pointer to irq_data */ + irq_data->intc = intc; + irq_data->offset = hw; + + parent_intc = intc->parent; + + /* set handler and flags */ + switch (irq_data->type) { + case S3C_IRQTYPE_NONE: + return 0; + case S3C_IRQTYPE_EINT: + /* On the S3C2412, the EINT0to3 have a parent irq + * but need the s3c_irq_eint0t4 chip + */ + if (parent_intc && (!soc_is_s3c2412() || hw >= 4)) + irq_set_chip_and_handler(virq, &s3c_irqext_chip, + handle_edge_irq); + else + irq_set_chip_and_handler(virq, &s3c_irq_eint0t4, + handle_edge_irq); + break; + case S3C_IRQTYPE_EDGE: + if (parent_intc || intc->reg_pending == S3C2416_SRCPND2) + irq_set_chip_and_handler(virq, &s3c_irq_level_chip, + handle_edge_irq); + else + irq_set_chip_and_handler(virq, &s3c_irq_chip, + handle_edge_irq); + break; + case S3C_IRQTYPE_LEVEL: + if (parent_intc) + irq_set_chip_and_handler(virq, &s3c_irq_level_chip, + handle_level_irq); + else + irq_set_chip_and_handler(virq, &s3c_irq_chip, + handle_level_irq); + break; + default: + pr_err("irq-s3c24xx: unsupported irqtype %d\n", irq_data->type); + return -EINVAL; + } + + irq_set_chip_data(virq, irq_data); + + set_irq_flags(virq, IRQF_VALID); + + if (parent_intc && irq_data->type != S3C_IRQTYPE_NONE) { + if (irq_data->parent_irq > 31) { + pr_err("irq-s3c24xx: parent irq %lu is out of range\n", + irq_data->parent_irq); + goto err; + } + + parent_irq_data = &parent_intc->irqs[irq_data->parent_irq]; + parent_irq_data->sub_intc = intc; + parent_irq_data->sub_bits |= (1UL << hw); + + /* attach the demuxer to the parent irq */ + irqno = irq_find_mapping(parent_intc->domain, + irq_data->parent_irq); + if (!irqno) { + pr_err("irq-s3c24xx: could not find mapping for parent irq %lu\n", + irq_data->parent_irq); + goto err; + } + irq_set_chained_handler(irqno, s3c_irq_demux); + } + + return 0; + +err: + set_irq_flags(virq, 0); + + /* the only error can result from bad mapping data*/ + return -EINVAL; +} + +static struct irq_domain_ops s3c24xx_irq_ops = { + .map = s3c24xx_irq_map, + .xlate = irq_domain_xlate_twocell, +}; + +static void s3c24xx_clear_intc(struct s3c_irq_intc *intc) +{ + void __iomem *reg_source; + unsigned long pend; + unsigned long last; + int i; + + /* if intpnd is set, read the next pending irq from there */ + reg_source = intc->reg_intpnd ? intc->reg_intpnd : intc->reg_pending; + + last = 0; + for (i = 0; i < 4; i++) { + pend = __raw_readl(reg_source); + + if (pend == 0 || pend == last) + break; + + __raw_writel(pend, intc->reg_pending); + if (intc->reg_intpnd) + __raw_writel(pend, intc->reg_intpnd); + + pr_info("irq: clearing pending status %08x\n", (int)pend); + last = pend; + } +} + +static struct s3c_irq_intc * __init s3c24xx_init_intc(struct device_node *np, + struct s3c_irq_data *irq_data, + struct s3c_irq_intc *parent, + unsigned long address) +{ + struct s3c_irq_intc *intc; + void __iomem *base = (void *)0xf6000000; /* static mapping */ + int irq_num; + int irq_start; + int ret; + + intc = kzalloc(sizeof(struct s3c_irq_intc), GFP_KERNEL); + if (!intc) + return ERR_PTR(-ENOMEM); + + intc->irqs = irq_data; + + if (parent) + intc->parent = parent; + + /* select the correct data for the controller. + * Need to hard code the irq num start and offset + * to preserve the static mapping for now + */ + switch (address) { + case 0x4a000000: + pr_debug("irq: found main intc\n"); + intc->reg_pending = base; + intc->reg_mask = base + 0x08; + intc->reg_intpnd = base + 0x10; + irq_num = 32; + irq_start = S3C2410_IRQ(0); + break; + case 0x4a000018: + pr_debug("irq: found subintc\n"); + intc->reg_pending = base + 0x18; + intc->reg_mask = base + 0x1c; + irq_num = 29; + irq_start = S3C2410_IRQSUB(0); + break; + case 0x4a000040: + pr_debug("irq: found intc2\n"); + intc->reg_pending = base + 0x40; + intc->reg_mask = base + 0x48; + intc->reg_intpnd = base + 0x50; + irq_num = 8; + irq_start = S3C2416_IRQ(0); + break; + case 0x560000a4: + pr_debug("irq: found eintc\n"); + base = (void *)0xfd000000; + + intc->reg_mask = base + 0xa4; + intc->reg_pending = base + 0xa8; + irq_num = 24; + irq_start = S3C2410_IRQ(32); + break; + default: + pr_err("irq: unsupported controller address\n"); + ret = -EINVAL; + goto err; + } + + /* now that all the data is complete, init the irq-domain */ + s3c24xx_clear_intc(intc); + intc->domain = irq_domain_add_legacy(np, irq_num, irq_start, + 0, &s3c24xx_irq_ops, + intc); + if (!intc->domain) { + pr_err("irq: could not create irq-domain\n"); + ret = -EINVAL; + goto err; + } + + set_handle_irq(s3c24xx_handle_irq); + + return intc; + +err: + kfree(intc); + return ERR_PTR(ret); +} + +static struct s3c_irq_data init_eint[32] = { + { .type = S3C_IRQTYPE_NONE, }, /* reserved */ + { .type = S3C_IRQTYPE_NONE, }, /* reserved */ + { .type = S3C_IRQTYPE_NONE, }, /* reserved */ + { .type = S3C_IRQTYPE_NONE, }, /* reserved */ + { .type = S3C_IRQTYPE_EINT, .parent_irq = 4 }, /* EINT4 */ + { .type = S3C_IRQTYPE_EINT, .parent_irq = 4 }, /* EINT5 */ + { .type = S3C_IRQTYPE_EINT, .parent_irq = 4 }, /* EINT6 */ + { .type = S3C_IRQTYPE_EINT, .parent_irq = 4 }, /* EINT7 */ + { .type = S3C_IRQTYPE_EINT, .parent_irq = 5 }, /* EINT8 */ + { .type = S3C_IRQTYPE_EINT, .parent_irq = 5 }, /* EINT9 */ + { .type = S3C_IRQTYPE_EINT, .parent_irq = 5 }, /* EINT10 */ + { .type = S3C_IRQTYPE_EINT, .parent_irq = 5 }, /* EINT11 */ + { .type = S3C_IRQTYPE_EINT, .parent_irq = 5 }, /* EINT12 */ + { .type = S3C_IRQTYPE_EINT, .parent_irq = 5 }, /* EINT13 */ + { .type = S3C_IRQTYPE_EINT, .parent_irq = 5 }, /* EINT14 */ + { .type = S3C_IRQTYPE_EINT, .parent_irq = 5 }, /* EINT15 */ + { .type = S3C_IRQTYPE_EINT, .parent_irq = 5 }, /* EINT16 */ + { .type = S3C_IRQTYPE_EINT, .parent_irq = 5 }, /* EINT17 */ + { .type = S3C_IRQTYPE_EINT, .parent_irq = 5 }, /* EINT18 */ + { .type = S3C_IRQTYPE_EINT, .parent_irq = 5 }, /* EINT19 */ + { .type = S3C_IRQTYPE_EINT, .parent_irq = 5 }, /* EINT20 */ + { .type = S3C_IRQTYPE_EINT, .parent_irq = 5 }, /* EINT21 */ + { .type = S3C_IRQTYPE_EINT, .parent_irq = 5 }, /* EINT22 */ + { .type = S3C_IRQTYPE_EINT, .parent_irq = 5 }, /* EINT23 */ +}; + +#ifdef CONFIG_CPU_S3C2410 +static struct s3c_irq_data init_s3c2410base[32] = { + { .type = S3C_IRQTYPE_EINT, }, /* EINT0 */ + { .type = S3C_IRQTYPE_EINT, }, /* EINT1 */ + { .type = S3C_IRQTYPE_EINT, }, /* EINT2 */ + { .type = S3C_IRQTYPE_EINT, }, /* EINT3 */ + { .type = S3C_IRQTYPE_LEVEL, }, /* EINT4to7 */ + { .type = S3C_IRQTYPE_LEVEL, }, /* EINT8to23 */ + { .type = S3C_IRQTYPE_NONE, }, /* reserved */ + { .type = S3C_IRQTYPE_EDGE, }, /* nBATT_FLT */ + { .type = S3C_IRQTYPE_EDGE, }, /* TICK */ + { .type = S3C_IRQTYPE_EDGE, }, /* WDT */ + { .type = S3C_IRQTYPE_EDGE, }, /* TIMER0 */ + { .type = S3C_IRQTYPE_EDGE, }, /* TIMER1 */ + { .type = S3C_IRQTYPE_EDGE, }, /* TIMER2 */ + { .type = S3C_IRQTYPE_EDGE, }, /* TIMER3 */ + { .type = S3C_IRQTYPE_EDGE, }, /* TIMER4 */ + { .type = S3C_IRQTYPE_LEVEL, }, /* UART2 */ + { .type = S3C_IRQTYPE_EDGE, }, /* LCD */ + { .type = S3C_IRQTYPE_EDGE, }, /* DMA0 */ + { .type = S3C_IRQTYPE_EDGE, }, /* DMA1 */ + { .type = S3C_IRQTYPE_EDGE, }, /* DMA2 */ + { .type = S3C_IRQTYPE_EDGE, }, /* DMA3 */ + { .type = S3C_IRQTYPE_EDGE, }, /* SDI */ + { .type = S3C_IRQTYPE_EDGE, }, /* SPI0 */ + { .type = S3C_IRQTYPE_LEVEL, }, /* UART1 */ + { .type = S3C_IRQTYPE_NONE, }, /* reserved */ + { .type = S3C_IRQTYPE_EDGE, }, /* USBD */ + { .type = S3C_IRQTYPE_EDGE, }, /* USBH */ + { .type = S3C_IRQTYPE_EDGE, }, /* IIC */ + { .type = S3C_IRQTYPE_LEVEL, }, /* UART0 */ + { .type = S3C_IRQTYPE_EDGE, }, /* SPI1 */ + { .type = S3C_IRQTYPE_EDGE, }, /* RTC */ + { .type = S3C_IRQTYPE_LEVEL, }, /* ADCPARENT */ +}; + +static struct s3c_irq_data init_s3c2410subint[32] = { + { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 28 }, /* UART0-RX */ + { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 28 }, /* UART0-TX */ + { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 28 }, /* UART0-ERR */ + { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 23 }, /* UART1-RX */ + { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 23 }, /* UART1-TX */ + { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 23 }, /* UART1-ERR */ + { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 15 }, /* UART2-RX */ + { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 15 }, /* UART2-TX */ + { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 15 }, /* UART2-ERR */ + { .type = S3C_IRQTYPE_EDGE, .parent_irq = 31 }, /* TC */ + { .type = S3C_IRQTYPE_EDGE, .parent_irq = 31 }, /* ADC */ +}; + +void __init s3c2410_init_irq(void) +{ +#ifdef CONFIG_FIQ + init_FIQ(FIQ_START); +#endif + + s3c_intc[0] = s3c24xx_init_intc(NULL, &init_s3c2410base[0], NULL, + 0x4a000000); + if (IS_ERR(s3c_intc[0])) { + pr_err("irq: could not create main interrupt controller\n"); + return; + } + + s3c_intc[1] = s3c24xx_init_intc(NULL, &init_s3c2410subint[0], + s3c_intc[0], 0x4a000018); + s3c24xx_init_intc(NULL, &init_eint[0], s3c_intc[0], 0x560000a4); +} +#endif + +#ifdef CONFIG_CPU_S3C2412 +static struct s3c_irq_data init_s3c2412base[32] = { + { .type = S3C_IRQTYPE_LEVEL, }, /* EINT0 */ + { .type = S3C_IRQTYPE_LEVEL, }, /* EINT1 */ + { .type = S3C_IRQTYPE_LEVEL, }, /* EINT2 */ + { .type = S3C_IRQTYPE_LEVEL, }, /* EINT3 */ + { .type = S3C_IRQTYPE_LEVEL, }, /* EINT4to7 */ + { .type = S3C_IRQTYPE_LEVEL, }, /* EINT8to23 */ + { .type = S3C_IRQTYPE_NONE, }, /* reserved */ + { .type = S3C_IRQTYPE_EDGE, }, /* nBATT_FLT */ + { .type = S3C_IRQTYPE_EDGE, }, /* TICK */ + { .type = S3C_IRQTYPE_EDGE, }, /* WDT */ + { .type = S3C_IRQTYPE_EDGE, }, /* TIMER0 */ + { .type = S3C_IRQTYPE_EDGE, }, /* TIMER1 */ + { .type = S3C_IRQTYPE_EDGE, }, /* TIMER2 */ + { .type = S3C_IRQTYPE_EDGE, }, /* TIMER3 */ + { .type = S3C_IRQTYPE_EDGE, }, /* TIMER4 */ + { .type = S3C_IRQTYPE_LEVEL, }, /* UART2 */ + { .type = S3C_IRQTYPE_EDGE, }, /* LCD */ + { .type = S3C_IRQTYPE_EDGE, }, /* DMA0 */ + { .type = S3C_IRQTYPE_EDGE, }, /* DMA1 */ + { .type = S3C_IRQTYPE_EDGE, }, /* DMA2 */ + { .type = S3C_IRQTYPE_EDGE, }, /* DMA3 */ + { .type = S3C_IRQTYPE_LEVEL, }, /* SDI/CF */ + { .type = S3C_IRQTYPE_EDGE, }, /* SPI0 */ + { .type = S3C_IRQTYPE_LEVEL, }, /* UART1 */ + { .type = S3C_IRQTYPE_NONE, }, /* reserved */ + { .type = S3C_IRQTYPE_EDGE, }, /* USBD */ + { .type = S3C_IRQTYPE_EDGE, }, /* USBH */ + { .type = S3C_IRQTYPE_EDGE, }, /* IIC */ + { .type = S3C_IRQTYPE_LEVEL, }, /* UART0 */ + { .type = S3C_IRQTYPE_EDGE, }, /* SPI1 */ + { .type = S3C_IRQTYPE_EDGE, }, /* RTC */ + { .type = S3C_IRQTYPE_LEVEL, }, /* ADCPARENT */ +}; + +static struct s3c_irq_data init_s3c2412eint[32] = { + { .type = S3C_IRQTYPE_EINT, .parent_irq = 0 }, /* EINT0 */ + { .type = S3C_IRQTYPE_EINT, .parent_irq = 1 }, /* EINT1 */ + { .type = S3C_IRQTYPE_EINT, .parent_irq = 2 }, /* EINT2 */ + { .type = S3C_IRQTYPE_EINT, .parent_irq = 3 }, /* EINT3 */ + { .type = S3C_IRQTYPE_EINT, .parent_irq = 4 }, /* EINT4 */ + { .type = S3C_IRQTYPE_EINT, .parent_irq = 4 }, /* EINT5 */ + { .type = S3C_IRQTYPE_EINT, .parent_irq = 4 }, /* EINT6 */ + { .type = S3C_IRQTYPE_EINT, .parent_irq = 4 }, /* EINT7 */ + { .type = S3C_IRQTYPE_EINT, .parent_irq = 5 }, /* EINT8 */ + { .type = S3C_IRQTYPE_EINT, .parent_irq = 5 }, /* EINT9 */ + { .type = S3C_IRQTYPE_EINT, .parent_irq = 5 }, /* EINT10 */ + { .type = S3C_IRQTYPE_EINT, .parent_irq = 5 }, /* EINT11 */ + { .type = S3C_IRQTYPE_EINT, .parent_irq = 5 }, /* EINT12 */ + { .type = S3C_IRQTYPE_EINT, .parent_irq = 5 }, /* EINT13 */ + { .type = S3C_IRQTYPE_EINT, .parent_irq = 5 }, /* EINT14 */ + { .type = S3C_IRQTYPE_EINT, .parent_irq = 5 }, /* EINT15 */ + { .type = S3C_IRQTYPE_EINT, .parent_irq = 5 }, /* EINT16 */ + { .type = S3C_IRQTYPE_EINT, .parent_irq = 5 }, /* EINT17 */ + { .type = S3C_IRQTYPE_EINT, .parent_irq = 5 }, /* EINT18 */ + { .type = S3C_IRQTYPE_EINT, .parent_irq = 5 }, /* EINT19 */ + { .type = S3C_IRQTYPE_EINT, .parent_irq = 5 }, /* EINT20 */ + { .type = S3C_IRQTYPE_EINT, .parent_irq = 5 }, /* EINT21 */ + { .type = S3C_IRQTYPE_EINT, .parent_irq = 5 }, /* EINT22 */ + { .type = S3C_IRQTYPE_EINT, .parent_irq = 5 }, /* EINT23 */ +}; + +static struct s3c_irq_data init_s3c2412subint[32] = { + { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 28 }, /* UART0-RX */ + { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 28 }, /* UART0-TX */ + { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 28 }, /* UART0-ERR */ + { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 23 }, /* UART1-RX */ + { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 23 }, /* UART1-TX */ + { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 23 }, /* UART1-ERR */ + { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 15 }, /* UART2-RX */ + { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 15 }, /* UART2-TX */ + { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 15 }, /* UART2-ERR */ + { .type = S3C_IRQTYPE_EDGE, .parent_irq = 31 }, /* TC */ + { .type = S3C_IRQTYPE_EDGE, .parent_irq = 31 }, /* ADC */ + { .type = S3C_IRQTYPE_NONE, }, + { .type = S3C_IRQTYPE_NONE, }, + { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 21 }, /* SDI */ + { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 21 }, /* CF */ +}; + +void __init s3c2412_init_irq(void) +{ + pr_info("S3C2412: IRQ Support\n"); + +#ifdef CONFIG_FIQ + init_FIQ(FIQ_START); +#endif + + s3c_intc[0] = s3c24xx_init_intc(NULL, &init_s3c2412base[0], NULL, + 0x4a000000); + if (IS_ERR(s3c_intc[0])) { + pr_err("irq: could not create main interrupt controller\n"); + return; + } + + s3c24xx_init_intc(NULL, &init_s3c2412eint[0], s3c_intc[0], 0x560000a4); + s3c_intc[1] = s3c24xx_init_intc(NULL, &init_s3c2412subint[0], + s3c_intc[0], 0x4a000018); +} +#endif + +#ifdef CONFIG_CPU_S3C2416 +static struct s3c_irq_data init_s3c2416base[32] = { + { .type = S3C_IRQTYPE_EINT, }, /* EINT0 */ + { .type = S3C_IRQTYPE_EINT, }, /* EINT1 */ + { .type = S3C_IRQTYPE_EINT, }, /* EINT2 */ + { .type = S3C_IRQTYPE_EINT, }, /* EINT3 */ + { .type = S3C_IRQTYPE_LEVEL, }, /* EINT4to7 */ + { .type = S3C_IRQTYPE_LEVEL, }, /* EINT8to23 */ + { .type = S3C_IRQTYPE_NONE, }, /* reserved */ + { .type = S3C_IRQTYPE_EDGE, }, /* nBATT_FLT */ + { .type = S3C_IRQTYPE_EDGE, }, /* TICK */ + { .type = S3C_IRQTYPE_LEVEL, }, /* WDT/AC97 */ + { .type = S3C_IRQTYPE_EDGE, }, /* TIMER0 */ + { .type = S3C_IRQTYPE_EDGE, }, /* TIMER1 */ + { .type = S3C_IRQTYPE_EDGE, }, /* TIMER2 */ + { .type = S3C_IRQTYPE_EDGE, }, /* TIMER3 */ + { .type = S3C_IRQTYPE_EDGE, }, /* TIMER4 */ + { .type = S3C_IRQTYPE_LEVEL, }, /* UART2 */ + { .type = S3C_IRQTYPE_LEVEL, }, /* LCD */ + { .type = S3C_IRQTYPE_LEVEL, }, /* DMA */ + { .type = S3C_IRQTYPE_LEVEL, }, /* UART3 */ + { .type = S3C_IRQTYPE_NONE, }, /* reserved */ + { .type = S3C_IRQTYPE_EDGE, }, /* SDI1 */ + { .type = S3C_IRQTYPE_EDGE, }, /* SDI0 */ + { .type = S3C_IRQTYPE_EDGE, }, /* SPI0 */ + { .type = S3C_IRQTYPE_LEVEL, }, /* UART1 */ + { .type = S3C_IRQTYPE_EDGE, }, /* NAND */ + { .type = S3C_IRQTYPE_EDGE, }, /* USBD */ + { .type = S3C_IRQTYPE_EDGE, }, /* USBH */ + { .type = S3C_IRQTYPE_EDGE, }, /* IIC */ + { .type = S3C_IRQTYPE_LEVEL, }, /* UART0 */ + { .type = S3C_IRQTYPE_NONE, }, + { .type = S3C_IRQTYPE_EDGE, }, /* RTC */ + { .type = S3C_IRQTYPE_LEVEL, }, /* ADCPARENT */ +}; + +static struct s3c_irq_data init_s3c2416subint[32] = { + { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 28 }, /* UART0-RX */ + { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 28 }, /* UART0-TX */ + { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 28 }, /* UART0-ERR */ + { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 23 }, /* UART1-RX */ + { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 23 }, /* UART1-TX */ + { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 23 }, /* UART1-ERR */ + { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 15 }, /* UART2-RX */ + { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 15 }, /* UART2-TX */ + { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 15 }, /* UART2-ERR */ + { .type = S3C_IRQTYPE_EDGE, .parent_irq = 31 }, /* TC */ + { .type = S3C_IRQTYPE_EDGE, .parent_irq = 31 }, /* ADC */ + { .type = S3C_IRQTYPE_NONE }, /* reserved */ + { .type = S3C_IRQTYPE_NONE }, /* reserved */ + { .type = S3C_IRQTYPE_NONE }, /* reserved */ + { .type = S3C_IRQTYPE_NONE }, /* reserved */ + { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 16 }, /* LCD2 */ + { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 16 }, /* LCD3 */ + { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 16 }, /* LCD4 */ + { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 17 }, /* DMA0 */ + { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 17 }, /* DMA1 */ + { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 17 }, /* DMA2 */ + { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 17 }, /* DMA3 */ + { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 17 }, /* DMA4 */ + { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 17 }, /* DMA5 */ + { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 18 }, /* UART3-RX */ + { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 18 }, /* UART3-TX */ + { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 18 }, /* UART3-ERR */ + { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 9 }, /* WDT */ + { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 9 }, /* AC97 */ +}; + +static struct s3c_irq_data init_s3c2416_second[32] = { + { .type = S3C_IRQTYPE_EDGE }, /* 2D */ + { .type = S3C_IRQTYPE_NONE }, /* reserved */ + { .type = S3C_IRQTYPE_NONE }, /* reserved */ + { .type = S3C_IRQTYPE_NONE }, /* reserved */ + { .type = S3C_IRQTYPE_EDGE }, /* PCM0 */ + { .type = S3C_IRQTYPE_NONE }, /* reserved */ + { .type = S3C_IRQTYPE_EDGE }, /* I2S0 */ +}; + +void __init s3c2416_init_irq(void) +{ + pr_info("S3C2416: IRQ Support\n"); + +#ifdef CONFIG_FIQ + init_FIQ(FIQ_START); +#endif + + s3c_intc[0] = s3c24xx_init_intc(NULL, &init_s3c2416base[0], NULL, + 0x4a000000); + if (IS_ERR(s3c_intc[0])) { + pr_err("irq: could not create main interrupt controller\n"); + return; + } + + s3c24xx_init_intc(NULL, &init_eint[0], s3c_intc[0], 0x560000a4); + s3c_intc[1] = s3c24xx_init_intc(NULL, &init_s3c2416subint[0], + s3c_intc[0], 0x4a000018); + + s3c_intc[2] = s3c24xx_init_intc(NULL, &init_s3c2416_second[0], + NULL, 0x4a000040); +} + +#endif + +#ifdef CONFIG_CPU_S3C2440 +static struct s3c_irq_data init_s3c2440base[32] = { + { .type = S3C_IRQTYPE_EINT, }, /* EINT0 */ + { .type = S3C_IRQTYPE_EINT, }, /* EINT1 */ + { .type = S3C_IRQTYPE_EINT, }, /* EINT2 */ + { .type = S3C_IRQTYPE_EINT, }, /* EINT3 */ + { .type = S3C_IRQTYPE_LEVEL, }, /* EINT4to7 */ + { .type = S3C_IRQTYPE_LEVEL, }, /* EINT8to23 */ + { .type = S3C_IRQTYPE_LEVEL, }, /* CAM */ + { .type = S3C_IRQTYPE_EDGE, }, /* nBATT_FLT */ + { .type = S3C_IRQTYPE_EDGE, }, /* TICK */ + { .type = S3C_IRQTYPE_LEVEL, }, /* WDT/AC97 */ + { .type = S3C_IRQTYPE_EDGE, }, /* TIMER0 */ + { .type = S3C_IRQTYPE_EDGE, }, /* TIMER1 */ + { .type = S3C_IRQTYPE_EDGE, }, /* TIMER2 */ + { .type = S3C_IRQTYPE_EDGE, }, /* TIMER3 */ + { .type = S3C_IRQTYPE_EDGE, }, /* TIMER4 */ + { .type = S3C_IRQTYPE_LEVEL, }, /* UART2 */ + { .type = S3C_IRQTYPE_EDGE, }, /* LCD */ + { .type = S3C_IRQTYPE_EDGE, }, /* DMA0 */ + { .type = S3C_IRQTYPE_EDGE, }, /* DMA1 */ + { .type = S3C_IRQTYPE_EDGE, }, /* DMA2 */ + { .type = S3C_IRQTYPE_EDGE, }, /* DMA3 */ + { .type = S3C_IRQTYPE_EDGE, }, /* SDI */ + { .type = S3C_IRQTYPE_EDGE, }, /* SPI0 */ + { .type = S3C_IRQTYPE_LEVEL, }, /* UART1 */ + { .type = S3C_IRQTYPE_LEVEL, }, /* NFCON */ + { .type = S3C_IRQTYPE_EDGE, }, /* USBD */ + { .type = S3C_IRQTYPE_EDGE, }, /* USBH */ + { .type = S3C_IRQTYPE_EDGE, }, /* IIC */ + { .type = S3C_IRQTYPE_LEVEL, }, /* UART0 */ + { .type = S3C_IRQTYPE_EDGE, }, /* SPI1 */ + { .type = S3C_IRQTYPE_EDGE, }, /* RTC */ + { .type = S3C_IRQTYPE_LEVEL, }, /* ADCPARENT */ +}; + +static struct s3c_irq_data init_s3c2440subint[32] = { + { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 28 }, /* UART0-RX */ + { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 28 }, /* UART0-TX */ + { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 28 }, /* UART0-ERR */ + { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 23 }, /* UART1-RX */ + { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 23 }, /* UART1-TX */ + { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 23 }, /* UART1-ERR */ + { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 15 }, /* UART2-RX */ + { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 15 }, /* UART2-TX */ + { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 15 }, /* UART2-ERR */ + { .type = S3C_IRQTYPE_EDGE, .parent_irq = 31 }, /* TC */ + { .type = S3C_IRQTYPE_EDGE, .parent_irq = 31 }, /* ADC */ + { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 6 }, /* CAM_C */ + { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 6 }, /* CAM_P */ + { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 9 }, /* WDT */ + { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 9 }, /* AC97 */ +}; + +void __init s3c2440_init_irq(void) +{ + pr_info("S3C2440: IRQ Support\n"); + +#ifdef CONFIG_FIQ + init_FIQ(FIQ_START); +#endif + + s3c_intc[0] = s3c24xx_init_intc(NULL, &init_s3c2440base[0], NULL, + 0x4a000000); + if (IS_ERR(s3c_intc[0])) { + pr_err("irq: could not create main interrupt controller\n"); + return; + } + + s3c24xx_init_intc(NULL, &init_eint[0], s3c_intc[0], 0x560000a4); + s3c_intc[1] = s3c24xx_init_intc(NULL, &init_s3c2440subint[0], + s3c_intc[0], 0x4a000018); +} +#endif + +#ifdef CONFIG_CPU_S3C2442 +static struct s3c_irq_data init_s3c2442base[32] = { + { .type = S3C_IRQTYPE_EINT, }, /* EINT0 */ + { .type = S3C_IRQTYPE_EINT, }, /* EINT1 */ + { .type = S3C_IRQTYPE_EINT, }, /* EINT2 */ + { .type = S3C_IRQTYPE_EINT, }, /* EINT3 */ + { .type = S3C_IRQTYPE_LEVEL, }, /* EINT4to7 */ + { .type = S3C_IRQTYPE_LEVEL, }, /* EINT8to23 */ + { .type = S3C_IRQTYPE_LEVEL, }, /* CAM */ + { .type = S3C_IRQTYPE_EDGE, }, /* nBATT_FLT */ + { .type = S3C_IRQTYPE_EDGE, }, /* TICK */ + { .type = S3C_IRQTYPE_EDGE, }, /* WDT */ + { .type = S3C_IRQTYPE_EDGE, }, /* TIMER0 */ + { .type = S3C_IRQTYPE_EDGE, }, /* TIMER1 */ + { .type = S3C_IRQTYPE_EDGE, }, /* TIMER2 */ + { .type = S3C_IRQTYPE_EDGE, }, /* TIMER3 */ + { .type = S3C_IRQTYPE_EDGE, }, /* TIMER4 */ + { .type = S3C_IRQTYPE_LEVEL, }, /* UART2 */ + { .type = S3C_IRQTYPE_EDGE, }, /* LCD */ + { .type = S3C_IRQTYPE_EDGE, }, /* DMA0 */ + { .type = S3C_IRQTYPE_EDGE, }, /* DMA1 */ + { .type = S3C_IRQTYPE_EDGE, }, /* DMA2 */ + { .type = S3C_IRQTYPE_EDGE, }, /* DMA3 */ + { .type = S3C_IRQTYPE_EDGE, }, /* SDI */ + { .type = S3C_IRQTYPE_EDGE, }, /* SPI0 */ + { .type = S3C_IRQTYPE_LEVEL, }, /* UART1 */ + { .type = S3C_IRQTYPE_LEVEL, }, /* NFCON */ + { .type = S3C_IRQTYPE_EDGE, }, /* USBD */ + { .type = S3C_IRQTYPE_EDGE, }, /* USBH */ + { .type = S3C_IRQTYPE_EDGE, }, /* IIC */ + { .type = S3C_IRQTYPE_LEVEL, }, /* UART0 */ + { .type = S3C_IRQTYPE_EDGE, }, /* SPI1 */ + { .type = S3C_IRQTYPE_EDGE, }, /* RTC */ + { .type = S3C_IRQTYPE_LEVEL, }, /* ADCPARENT */ +}; + +static struct s3c_irq_data init_s3c2442subint[32] = { + { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 28 }, /* UART0-RX */ + { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 28 }, /* UART0-TX */ + { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 28 }, /* UART0-ERR */ + { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 23 }, /* UART1-RX */ + { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 23 }, /* UART1-TX */ + { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 23 }, /* UART1-ERR */ + { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 15 }, /* UART2-RX */ + { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 15 }, /* UART2-TX */ + { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 15 }, /* UART2-ERR */ + { .type = S3C_IRQTYPE_EDGE, .parent_irq = 31 }, /* TC */ + { .type = S3C_IRQTYPE_EDGE, .parent_irq = 31 }, /* ADC */ + { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 6 }, /* CAM_C */ + { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 6 }, /* CAM_P */ +}; + +void __init s3c2442_init_irq(void) +{ + pr_info("S3C2442: IRQ Support\n"); + +#ifdef CONFIG_FIQ + init_FIQ(FIQ_START); +#endif + + s3c_intc[0] = s3c24xx_init_intc(NULL, &init_s3c2442base[0], NULL, + 0x4a000000); + if (IS_ERR(s3c_intc[0])) { + pr_err("irq: could not create main interrupt controller\n"); + return; + } + + s3c24xx_init_intc(NULL, &init_eint[0], s3c_intc[0], 0x560000a4); + s3c_intc[1] = s3c24xx_init_intc(NULL, &init_s3c2442subint[0], + s3c_intc[0], 0x4a000018); +} +#endif + +#ifdef CONFIG_CPU_S3C2443 +static struct s3c_irq_data init_s3c2443base[32] = { + { .type = S3C_IRQTYPE_EINT, }, /* EINT0 */ + { .type = S3C_IRQTYPE_EINT, }, /* EINT1 */ + { .type = S3C_IRQTYPE_EINT, }, /* EINT2 */ + { .type = S3C_IRQTYPE_EINT, }, /* EINT3 */ + { .type = S3C_IRQTYPE_LEVEL, }, /* EINT4to7 */ + { .type = S3C_IRQTYPE_LEVEL, }, /* EINT8to23 */ + { .type = S3C_IRQTYPE_LEVEL, }, /* CAM */ + { .type = S3C_IRQTYPE_EDGE, }, /* nBATT_FLT */ + { .type = S3C_IRQTYPE_EDGE, }, /* TICK */ + { .type = S3C_IRQTYPE_LEVEL, }, /* WDT/AC97 */ + { .type = S3C_IRQTYPE_EDGE, }, /* TIMER0 */ + { .type = S3C_IRQTYPE_EDGE, }, /* TIMER1 */ + { .type = S3C_IRQTYPE_EDGE, }, /* TIMER2 */ + { .type = S3C_IRQTYPE_EDGE, }, /* TIMER3 */ + { .type = S3C_IRQTYPE_EDGE, }, /* TIMER4 */ + { .type = S3C_IRQTYPE_LEVEL, }, /* UART2 */ + { .type = S3C_IRQTYPE_LEVEL, }, /* LCD */ + { .type = S3C_IRQTYPE_LEVEL, }, /* DMA */ + { .type = S3C_IRQTYPE_LEVEL, }, /* UART3 */ + { .type = S3C_IRQTYPE_EDGE, }, /* CFON */ + { .type = S3C_IRQTYPE_EDGE, }, /* SDI1 */ + { .type = S3C_IRQTYPE_EDGE, }, /* SDI0 */ + { .type = S3C_IRQTYPE_EDGE, }, /* SPI0 */ + { .type = S3C_IRQTYPE_LEVEL, }, /* UART1 */ + { .type = S3C_IRQTYPE_EDGE, }, /* NAND */ + { .type = S3C_IRQTYPE_EDGE, }, /* USBD */ + { .type = S3C_IRQTYPE_EDGE, }, /* USBH */ + { .type = S3C_IRQTYPE_EDGE, }, /* IIC */ + { .type = S3C_IRQTYPE_LEVEL, }, /* UART0 */ + { .type = S3C_IRQTYPE_EDGE, }, /* SPI1 */ + { .type = S3C_IRQTYPE_EDGE, }, /* RTC */ + { .type = S3C_IRQTYPE_LEVEL, }, /* ADCPARENT */ +}; + + +static struct s3c_irq_data init_s3c2443subint[32] = { + { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 28 }, /* UART0-RX */ + { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 28 }, /* UART0-TX */ + { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 28 }, /* UART0-ERR */ + { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 23 }, /* UART1-RX */ + { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 23 }, /* UART1-TX */ + { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 23 }, /* UART1-ERR */ + { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 15 }, /* UART2-RX */ + { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 15 }, /* UART2-TX */ + { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 15 }, /* UART2-ERR */ + { .type = S3C_IRQTYPE_EDGE, .parent_irq = 31 }, /* TC */ + { .type = S3C_IRQTYPE_EDGE, .parent_irq = 31 }, /* ADC */ + { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 6 }, /* CAM_C */ + { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 6 }, /* CAM_P */ + { .type = S3C_IRQTYPE_NONE }, /* reserved */ + { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 16 }, /* LCD1 */ + { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 16 }, /* LCD2 */ + { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 16 }, /* LCD3 */ + { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 16 }, /* LCD4 */ + { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 17 }, /* DMA0 */ + { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 17 }, /* DMA1 */ + { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 17 }, /* DMA2 */ + { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 17 }, /* DMA3 */ + { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 17 }, /* DMA4 */ + { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 17 }, /* DMA5 */ + { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 18 }, /* UART3-RX */ + { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 18 }, /* UART3-TX */ + { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 18 }, /* UART3-ERR */ + { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 9 }, /* WDT */ + { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 9 }, /* AC97 */ +}; + +void __init s3c2443_init_irq(void) +{ + pr_info("S3C2443: IRQ Support\n"); + +#ifdef CONFIG_FIQ + init_FIQ(FIQ_START); +#endif + + s3c_intc[0] = s3c24xx_init_intc(NULL, &init_s3c2443base[0], NULL, + 0x4a000000); + if (IS_ERR(s3c_intc[0])) { + pr_err("irq: could not create main interrupt controller\n"); + return; + } + + s3c24xx_init_intc(NULL, &init_eint[0], s3c_intc[0], 0x560000a4); + s3c_intc[1] = s3c24xx_init_intc(NULL, &init_s3c2443subint[0], + s3c_intc[0], 0x4a000018); +} +#endif + +#ifdef CONFIG_OF +static int s3c24xx_irq_map_of(struct irq_domain *h, unsigned int virq, + irq_hw_number_t hw) +{ + unsigned int ctrl_num = hw / 32; + unsigned int intc_hw = hw % 32; + struct s3c_irq_intc *intc = s3c_intc[ctrl_num]; + struct s3c_irq_intc *parent_intc = intc->parent; + struct s3c_irq_data *irq_data = &intc->irqs[intc_hw]; + + /* attach controller pointer to irq_data */ + irq_data->intc = intc; + irq_data->offset = intc_hw; + + if (!parent_intc) + irq_set_chip_and_handler(virq, &s3c_irq_chip, handle_edge_irq); + else + irq_set_chip_and_handler(virq, &s3c_irq_level_chip, + handle_edge_irq); + + irq_set_chip_data(virq, irq_data); + + set_irq_flags(virq, IRQF_VALID); + + return 0; +} + +/* Translate our of irq notation + * format: <ctrl_num ctrl_irq parent_irq type> + */ +static int s3c24xx_irq_xlate_of(struct irq_domain *d, struct device_node *n, + const u32 *intspec, unsigned int intsize, + irq_hw_number_t *out_hwirq, unsigned int *out_type) +{ + struct s3c_irq_intc *intc; + struct s3c_irq_intc *parent_intc; + struct s3c_irq_data *irq_data; + struct s3c_irq_data *parent_irq_data; + int irqno; + + if (WARN_ON(intsize < 4)) + return -EINVAL; + + if (intspec[0] > 2 || !s3c_intc[intspec[0]]) { + pr_err("controller number %d invalid\n", intspec[0]); + return -EINVAL; + } + intc = s3c_intc[intspec[0]]; + + *out_hwirq = intspec[0] * 32 + intspec[2]; + *out_type = intspec[3] & IRQ_TYPE_SENSE_MASK; + + parent_intc = intc->parent; + if (parent_intc) { + irq_data = &intc->irqs[intspec[2]]; + irq_data->parent_irq = intspec[1]; + parent_irq_data = &parent_intc->irqs[irq_data->parent_irq]; + parent_irq_data->sub_intc = intc; + parent_irq_data->sub_bits |= (1UL << intspec[2]); + + /* parent_intc is always s3c_intc[0], so no offset */ + irqno = irq_create_mapping(parent_intc->domain, intspec[1]); + if (irqno < 0) { + pr_err("irq: could not map parent interrupt\n"); + return irqno; + } + + irq_set_chained_handler(irqno, s3c_irq_demux); + } + + return 0; +} + +static struct irq_domain_ops s3c24xx_irq_ops_of = { + .map = s3c24xx_irq_map_of, + .xlate = s3c24xx_irq_xlate_of, +}; + +struct s3c24xx_irq_of_ctrl { + char *name; + unsigned long offset; + struct s3c_irq_intc **handle; + struct s3c_irq_intc **parent; + struct irq_domain_ops *ops; +}; + +static int __init s3c_init_intc_of(struct device_node *np, + struct device_node *interrupt_parent, + struct s3c24xx_irq_of_ctrl *s3c_ctrl, int num_ctrl) +{ + struct s3c_irq_intc *intc; + struct s3c24xx_irq_of_ctrl *ctrl; + struct irq_domain *domain; + void __iomem *reg_base; + int i; + + reg_base = of_iomap(np, 0); + if (!reg_base) { + pr_err("irq-s3c24xx: could not map irq registers\n"); + return -EINVAL; + } + + domain = irq_domain_add_linear(np, num_ctrl * 32, + &s3c24xx_irq_ops_of, NULL); + if (!domain) { + pr_err("irq: could not create irq-domain\n"); + return -EINVAL; + } + + for (i = 0; i < num_ctrl; i++) { + ctrl = &s3c_ctrl[i]; + + pr_debug("irq: found controller %s\n", ctrl->name); + + intc = kzalloc(sizeof(struct s3c_irq_intc), GFP_KERNEL); + if (!intc) + return -ENOMEM; + + intc->domain = domain; + intc->irqs = kzalloc(sizeof(struct s3c_irq_data) * 32, + GFP_KERNEL); + if (!intc->irqs) { + kfree(intc); + return -ENOMEM; + } + + if (ctrl->parent) { + intc->reg_pending = reg_base + ctrl->offset; + intc->reg_mask = reg_base + ctrl->offset + 0x4; + + if (*(ctrl->parent)) { + intc->parent = *(ctrl->parent); + } else { + pr_warn("irq: parent of %s missing\n", + ctrl->name); + kfree(intc->irqs); + kfree(intc); + continue; + } + } else { + intc->reg_pending = reg_base + ctrl->offset; + intc->reg_mask = reg_base + ctrl->offset + 0x08; + intc->reg_intpnd = reg_base + ctrl->offset + 0x10; + } + + s3c24xx_clear_intc(intc); + s3c_intc[i] = intc; + } + + set_handle_irq(s3c24xx_handle_irq); + + return 0; +} + +static struct s3c24xx_irq_of_ctrl s3c2410_ctrl[] = { + { + .name = "intc", + .offset = 0, + }, { + .name = "subintc", + .offset = 0x18, + .parent = &s3c_intc[0], + } +}; + +int __init s3c2410_init_intc_of(struct device_node *np, + struct device_node *interrupt_parent, + struct s3c24xx_irq_of_ctrl *ctrl, int num_ctrl) +{ + return s3c_init_intc_of(np, interrupt_parent, + s3c2410_ctrl, ARRAY_SIZE(s3c2410_ctrl)); +} +IRQCHIP_DECLARE(s3c2410_irq, "samsung,s3c2410-irq", s3c2410_init_intc_of); + +static struct s3c24xx_irq_of_ctrl s3c2416_ctrl[] = { + { + .name = "intc", + .offset = 0, + }, { + .name = "subintc", + .offset = 0x18, + .parent = &s3c_intc[0], + }, { + .name = "intc2", + .offset = 0x40, + } +}; + +int __init s3c2416_init_intc_of(struct device_node *np, + struct device_node *interrupt_parent, + struct s3c24xx_irq_of_ctrl *ctrl, int num_ctrl) +{ + return s3c_init_intc_of(np, interrupt_parent, + s3c2416_ctrl, ARRAY_SIZE(s3c2416_ctrl)); +} +IRQCHIP_DECLARE(s3c2416_irq, "samsung,s3c2416-irq", s3c2416_init_intc_of); +#endif diff --git a/drivers/irqchip/irq-sirfsoc.c b/drivers/irqchip/irq-sirfsoc.c new file mode 100644 index 000000000000..69ea44ebcf61 --- /dev/null +++ b/drivers/irqchip/irq-sirfsoc.c @@ -0,0 +1,126 @@ +/* + * interrupt controller support for CSR SiRFprimaII + * + * Copyright (c) 2011 Cambridge Silicon Radio Limited, a CSR plc group company. + * + * Licensed under GPLv2 or later. + */ + +#include <linux/init.h> +#include <linux/io.h> +#include <linux/irq.h> +#include <linux/of.h> +#include <linux/of_address.h> +#include <linux/irqdomain.h> +#include <linux/syscore_ops.h> +#include <asm/mach/irq.h> +#include <asm/exception.h> +#include "irqchip.h" + +#define SIRFSOC_INT_RISC_MASK0 0x0018 +#define SIRFSOC_INT_RISC_MASK1 0x001C +#define SIRFSOC_INT_RISC_LEVEL0 0x0020 +#define SIRFSOC_INT_RISC_LEVEL1 0x0024 +#define SIRFSOC_INIT_IRQ_ID 0x0038 + +#define SIRFSOC_NUM_IRQS 128 + +static struct irq_domain *sirfsoc_irqdomain; + +static __init void +sirfsoc_alloc_gc(void __iomem *base, unsigned int irq_start, unsigned int num) +{ + struct irq_chip_generic *gc; + struct irq_chip_type *ct; + + gc = irq_alloc_generic_chip("SIRFINTC", 1, irq_start, base, handle_level_irq); + ct = gc->chip_types; + + ct->chip.irq_mask = irq_gc_mask_clr_bit; + ct->chip.irq_unmask = irq_gc_mask_set_bit; + ct->regs.mask = SIRFSOC_INT_RISC_MASK0; + + irq_setup_generic_chip(gc, IRQ_MSK(num), IRQ_GC_INIT_MASK_CACHE, IRQ_NOREQUEST, 0); +} + +static asmlinkage void __exception_irq_entry sirfsoc_handle_irq(struct pt_regs *regs) +{ + void __iomem *base = sirfsoc_irqdomain->host_data; + u32 irqstat, irqnr; + + irqstat = readl_relaxed(base + SIRFSOC_INIT_IRQ_ID); + irqnr = irq_find_mapping(sirfsoc_irqdomain, irqstat & 0xff); + + handle_IRQ(irqnr, regs); +} + +static int __init sirfsoc_irq_init(struct device_node *np, struct device_node *parent) +{ + void __iomem *base = of_iomap(np, 0); + if (!base) + panic("unable to map intc cpu registers\n"); + + /* using legacy because irqchip_generic does not work with linear */ + sirfsoc_irqdomain = irq_domain_add_legacy(np, SIRFSOC_NUM_IRQS, 0, 0, + &irq_domain_simple_ops, base); + + sirfsoc_alloc_gc(base, 0, 32); + sirfsoc_alloc_gc(base + 4, 32, SIRFSOC_NUM_IRQS - 32); + + writel_relaxed(0, base + SIRFSOC_INT_RISC_LEVEL0); + writel_relaxed(0, base + SIRFSOC_INT_RISC_LEVEL1); + + writel_relaxed(0, base + SIRFSOC_INT_RISC_MASK0); + writel_relaxed(0, base + SIRFSOC_INT_RISC_MASK1); + + set_handle_irq(sirfsoc_handle_irq); + + return 0; +} +IRQCHIP_DECLARE(sirfsoc_intc, "sirf,prima2-intc", sirfsoc_irq_init); + +struct sirfsoc_irq_status { + u32 mask0; + u32 mask1; + u32 level0; + u32 level1; +}; + +static struct sirfsoc_irq_status sirfsoc_irq_st; + +static int sirfsoc_irq_suspend(void) +{ + void __iomem *base = sirfsoc_irqdomain->host_data; + + sirfsoc_irq_st.mask0 = readl_relaxed(base + SIRFSOC_INT_RISC_MASK0); + sirfsoc_irq_st.mask1 = readl_relaxed(base + SIRFSOC_INT_RISC_MASK1); + sirfsoc_irq_st.level0 = readl_relaxed(base + SIRFSOC_INT_RISC_LEVEL0); + sirfsoc_irq_st.level1 = readl_relaxed(base + SIRFSOC_INT_RISC_LEVEL1); + + return 0; +} + +static void sirfsoc_irq_resume(void) +{ + void __iomem *base = sirfsoc_irqdomain->host_data; + + writel_relaxed(sirfsoc_irq_st.mask0, base + SIRFSOC_INT_RISC_MASK0); + writel_relaxed(sirfsoc_irq_st.mask1, base + SIRFSOC_INT_RISC_MASK1); + writel_relaxed(sirfsoc_irq_st.level0, base + SIRFSOC_INT_RISC_LEVEL0); + writel_relaxed(sirfsoc_irq_st.level1, base + SIRFSOC_INT_RISC_LEVEL1); +} + +static struct syscore_ops sirfsoc_irq_syscore_ops = { + .suspend = sirfsoc_irq_suspend, + .resume = sirfsoc_irq_resume, +}; + +static int __init sirfsoc_irq_pm_init(void) +{ + if (!sirfsoc_irqdomain) + return 0; + + register_syscore_ops(&sirfsoc_irq_syscore_ops); + return 0; +} +device_initcall(sirfsoc_irq_pm_init); diff --git a/drivers/irqchip/irq-sun4i.c b/drivers/irqchip/irq-sun4i.c new file mode 100644 index 000000000000..b66d4ae06898 --- /dev/null +++ b/drivers/irqchip/irq-sun4i.c @@ -0,0 +1,149 @@ +/* + * Allwinner A1X SoCs IRQ chip driver. + * + * Copyright (C) 2012 Maxime Ripard + * + * Maxime Ripard <maxime.ripard@free-electrons.com> + * + * Based on code from + * Allwinner Technology Co., Ltd. <www.allwinnertech.com> + * Benn Huang <benn@allwinnertech.com> + * + * This file is licensed under the terms of the GNU General Public + * License version 2. This program is licensed "as is" without any + * warranty of any kind, whether express or implied. + */ + +#include <linux/io.h> +#include <linux/irq.h> +#include <linux/of.h> +#include <linux/of_address.h> +#include <linux/of_irq.h> + +#include <asm/exception.h> +#include <asm/mach/irq.h> + +#include "irqchip.h" + +#define SUN4I_IRQ_VECTOR_REG 0x00 +#define SUN4I_IRQ_PROTECTION_REG 0x08 +#define SUN4I_IRQ_NMI_CTRL_REG 0x0c +#define SUN4I_IRQ_PENDING_REG(x) (0x10 + 0x4 * x) +#define SUN4I_IRQ_FIQ_PENDING_REG(x) (0x20 + 0x4 * x) +#define SUN4I_IRQ_ENABLE_REG(x) (0x40 + 0x4 * x) +#define SUN4I_IRQ_MASK_REG(x) (0x50 + 0x4 * x) + +static void __iomem *sun4i_irq_base; +static struct irq_domain *sun4i_irq_domain; + +static asmlinkage void __exception_irq_entry sun4i_handle_irq(struct pt_regs *regs); + +void sun4i_irq_ack(struct irq_data *irqd) +{ + unsigned int irq = irqd_to_hwirq(irqd); + unsigned int irq_off = irq % 32; + int reg = irq / 32; + u32 val; + + val = readl(sun4i_irq_base + SUN4I_IRQ_PENDING_REG(reg)); + writel(val | (1 << irq_off), + sun4i_irq_base + SUN4I_IRQ_PENDING_REG(reg)); +} + +static void sun4i_irq_mask(struct irq_data *irqd) +{ + unsigned int irq = irqd_to_hwirq(irqd); + unsigned int irq_off = irq % 32; + int reg = irq / 32; + u32 val; + + val = readl(sun4i_irq_base + SUN4I_IRQ_ENABLE_REG(reg)); + writel(val & ~(1 << irq_off), + sun4i_irq_base + SUN4I_IRQ_ENABLE_REG(reg)); +} + +static void sun4i_irq_unmask(struct irq_data *irqd) +{ + unsigned int irq = irqd_to_hwirq(irqd); + unsigned int irq_off = irq % 32; + int reg = irq / 32; + u32 val; + + val = readl(sun4i_irq_base + SUN4I_IRQ_ENABLE_REG(reg)); + writel(val | (1 << irq_off), + sun4i_irq_base + SUN4I_IRQ_ENABLE_REG(reg)); +} + +static struct irq_chip sun4i_irq_chip = { + .name = "sun4i_irq", + .irq_ack = sun4i_irq_ack, + .irq_mask = sun4i_irq_mask, + .irq_unmask = sun4i_irq_unmask, +}; + +static int sun4i_irq_map(struct irq_domain *d, unsigned int virq, + irq_hw_number_t hw) +{ + irq_set_chip_and_handler(virq, &sun4i_irq_chip, + handle_level_irq); + set_irq_flags(virq, IRQF_VALID | IRQF_PROBE); + + return 0; +} + +static struct irq_domain_ops sun4i_irq_ops = { + .map = sun4i_irq_map, + .xlate = irq_domain_xlate_onecell, +}; + +static int __init sun4i_of_init(struct device_node *node, + struct device_node *parent) +{ + sun4i_irq_base = of_iomap(node, 0); + if (!sun4i_irq_base) + panic("%s: unable to map IC registers\n", + node->full_name); + + /* Disable all interrupts */ + writel(0, sun4i_irq_base + SUN4I_IRQ_ENABLE_REG(0)); + writel(0, sun4i_irq_base + SUN4I_IRQ_ENABLE_REG(1)); + writel(0, sun4i_irq_base + SUN4I_IRQ_ENABLE_REG(2)); + + /* Mask all the interrupts */ + writel(0, sun4i_irq_base + SUN4I_IRQ_MASK_REG(0)); + writel(0, sun4i_irq_base + SUN4I_IRQ_MASK_REG(1)); + writel(0, sun4i_irq_base + SUN4I_IRQ_MASK_REG(2)); + + /* Clear all the pending interrupts */ + writel(0xffffffff, sun4i_irq_base + SUN4I_IRQ_PENDING_REG(0)); + writel(0xffffffff, sun4i_irq_base + SUN4I_IRQ_PENDING_REG(1)); + writel(0xffffffff, sun4i_irq_base + SUN4I_IRQ_PENDING_REG(2)); + + /* Enable protection mode */ + writel(0x01, sun4i_irq_base + SUN4I_IRQ_PROTECTION_REG); + + /* Configure the external interrupt source type */ + writel(0x00, sun4i_irq_base + SUN4I_IRQ_NMI_CTRL_REG); + + sun4i_irq_domain = irq_domain_add_linear(node, 3 * 32, + &sun4i_irq_ops, NULL); + if (!sun4i_irq_domain) + panic("%s: unable to create IRQ domain\n", node->full_name); + + set_handle_irq(sun4i_handle_irq); + + return 0; +} +IRQCHIP_DECLARE(allwinner_sun4i_ic, "allwinner,sun4i-ic", sun4i_of_init); + +static asmlinkage void __exception_irq_entry sun4i_handle_irq(struct pt_regs *regs) +{ + u32 irq, hwirq; + + hwirq = readl(sun4i_irq_base + SUN4I_IRQ_VECTOR_REG) >> 2; + while (hwirq != 0) { + irq = irq_find_mapping(sun4i_irq_domain, hwirq); + handle_IRQ(irq, regs); + hwirq = readl(sun4i_irq_base + SUN4I_IRQ_VECTOR_REG) >> 2; + } +} diff --git a/drivers/irqchip/irq-sunxi.c b/drivers/irqchip/irq-sunxi.c deleted file mode 100644 index 10974fa42653..000000000000 --- a/drivers/irqchip/irq-sunxi.c +++ /dev/null @@ -1,151 +0,0 @@ -/* - * Allwinner A1X SoCs IRQ chip driver. - * - * Copyright (C) 2012 Maxime Ripard - * - * Maxime Ripard <maxime.ripard@free-electrons.com> - * - * Based on code from - * Allwinner Technology Co., Ltd. <www.allwinnertech.com> - * Benn Huang <benn@allwinnertech.com> - * - * This file is licensed under the terms of the GNU General Public - * License version 2. This program is licensed "as is" without any - * warranty of any kind, whether express or implied. - */ - -#include <linux/io.h> -#include <linux/irq.h> -#include <linux/of.h> -#include <linux/of_address.h> -#include <linux/of_irq.h> - -#include <linux/irqchip/sunxi.h> - -#define SUNXI_IRQ_VECTOR_REG 0x00 -#define SUNXI_IRQ_PROTECTION_REG 0x08 -#define SUNXI_IRQ_NMI_CTRL_REG 0x0c -#define SUNXI_IRQ_PENDING_REG(x) (0x10 + 0x4 * x) -#define SUNXI_IRQ_FIQ_PENDING_REG(x) (0x20 + 0x4 * x) -#define SUNXI_IRQ_ENABLE_REG(x) (0x40 + 0x4 * x) -#define SUNXI_IRQ_MASK_REG(x) (0x50 + 0x4 * x) - -static void __iomem *sunxi_irq_base; -static struct irq_domain *sunxi_irq_domain; - -void sunxi_irq_ack(struct irq_data *irqd) -{ - unsigned int irq = irqd_to_hwirq(irqd); - unsigned int irq_off = irq % 32; - int reg = irq / 32; - u32 val; - - val = readl(sunxi_irq_base + SUNXI_IRQ_PENDING_REG(reg)); - writel(val | (1 << irq_off), - sunxi_irq_base + SUNXI_IRQ_PENDING_REG(reg)); -} - -static void sunxi_irq_mask(struct irq_data *irqd) -{ - unsigned int irq = irqd_to_hwirq(irqd); - unsigned int irq_off = irq % 32; - int reg = irq / 32; - u32 val; - - val = readl(sunxi_irq_base + SUNXI_IRQ_ENABLE_REG(reg)); - writel(val & ~(1 << irq_off), - sunxi_irq_base + SUNXI_IRQ_ENABLE_REG(reg)); -} - -static void sunxi_irq_unmask(struct irq_data *irqd) -{ - unsigned int irq = irqd_to_hwirq(irqd); - unsigned int irq_off = irq % 32; - int reg = irq / 32; - u32 val; - - val = readl(sunxi_irq_base + SUNXI_IRQ_ENABLE_REG(reg)); - writel(val | (1 << irq_off), - sunxi_irq_base + SUNXI_IRQ_ENABLE_REG(reg)); -} - -static struct irq_chip sunxi_irq_chip = { - .name = "sunxi_irq", - .irq_ack = sunxi_irq_ack, - .irq_mask = sunxi_irq_mask, - .irq_unmask = sunxi_irq_unmask, -}; - -static int sunxi_irq_map(struct irq_domain *d, unsigned int virq, - irq_hw_number_t hw) -{ - irq_set_chip_and_handler(virq, &sunxi_irq_chip, - handle_level_irq); - set_irq_flags(virq, IRQF_VALID | IRQF_PROBE); - - return 0; -} - -static struct irq_domain_ops sunxi_irq_ops = { - .map = sunxi_irq_map, - .xlate = irq_domain_xlate_onecell, -}; - -static int __init sunxi_of_init(struct device_node *node, - struct device_node *parent) -{ - sunxi_irq_base = of_iomap(node, 0); - if (!sunxi_irq_base) - panic("%s: unable to map IC registers\n", - node->full_name); - - /* Disable all interrupts */ - writel(0, sunxi_irq_base + SUNXI_IRQ_ENABLE_REG(0)); - writel(0, sunxi_irq_base + SUNXI_IRQ_ENABLE_REG(1)); - writel(0, sunxi_irq_base + SUNXI_IRQ_ENABLE_REG(2)); - - /* Mask all the interrupts */ - writel(0, sunxi_irq_base + SUNXI_IRQ_MASK_REG(0)); - writel(0, sunxi_irq_base + SUNXI_IRQ_MASK_REG(1)); - writel(0, sunxi_irq_base + SUNXI_IRQ_MASK_REG(2)); - - /* Clear all the pending interrupts */ - writel(0xffffffff, sunxi_irq_base + SUNXI_IRQ_PENDING_REG(0)); - writel(0xffffffff, sunxi_irq_base + SUNXI_IRQ_PENDING_REG(1)); - writel(0xffffffff, sunxi_irq_base + SUNXI_IRQ_PENDING_REG(2)); - - /* Enable protection mode */ - writel(0x01, sunxi_irq_base + SUNXI_IRQ_PROTECTION_REG); - - /* Configure the external interrupt source type */ - writel(0x00, sunxi_irq_base + SUNXI_IRQ_NMI_CTRL_REG); - - sunxi_irq_domain = irq_domain_add_linear(node, 3 * 32, - &sunxi_irq_ops, NULL); - if (!sunxi_irq_domain) - panic("%s: unable to create IRQ domain\n", node->full_name); - - return 0; -} - -static struct of_device_id sunxi_irq_dt_ids[] __initconst = { - { .compatible = "allwinner,sunxi-ic", .data = sunxi_of_init }, - { } -}; - -void __init sunxi_init_irq(void) -{ - of_irq_init(sunxi_irq_dt_ids); -} - -asmlinkage void __exception_irq_entry sunxi_handle_irq(struct pt_regs *regs) -{ - u32 irq, hwirq; - - hwirq = readl(sunxi_irq_base + SUNXI_IRQ_VECTOR_REG) >> 2; - while (hwirq != 0) { - irq = irq_find_mapping(sunxi_irq_domain, hwirq); - handle_IRQ(irq, regs); - hwirq = readl(sunxi_irq_base + SUNXI_IRQ_VECTOR_REG) >> 2; - } -} diff --git a/drivers/irqchip/irq-versatile-fpga.c b/drivers/irqchip/irq-versatile-fpga.c index 9dbd82b716d3..065b7a31a478 100644 --- a/drivers/irqchip/irq-versatile-fpga.c +++ b/drivers/irqchip/irq-versatile-fpga.c @@ -139,7 +139,7 @@ void __init fpga_irq_init(void __iomem *base, const char *name, int irq_start, int i; if (fpga_irq_id >= ARRAY_SIZE(fpga_irq_devices)) { - pr_err("%s: too few FPGA IRQ controllers, increase CONFIG_PLAT_VERSATILE_FPGA_IRQ_NR\n", __func__); + pr_err("%s: too few FPGA IRQ controllers, increase CONFIG_VERSATILE_FPGA_IRQ_NR\n", __func__); return; } f = &fpga_irq_devices[fpga_irq_id]; diff --git a/drivers/irqchip/irq-vic.c b/drivers/irqchip/irq-vic.c index 3cf97aaebe40..884d11c7355f 100644 --- a/drivers/irqchip/irq-vic.c +++ b/drivers/irqchip/irq-vic.c @@ -23,6 +23,7 @@ #include <linux/init.h> #include <linux/list.h> #include <linux/io.h> +#include <linux/irq.h> #include <linux/irqdomain.h> #include <linux/of.h> #include <linux/of_address.h> @@ -33,7 +34,7 @@ #include <linux/irqchip/arm-vic.h> #include <asm/exception.h> -#include <asm/mach/irq.h> +#include <asm/irq.h> #include "irqchip.h" diff --git a/drivers/irqchip/irq-vt8500.c b/drivers/irqchip/irq-vt8500.c new file mode 100644 index 000000000000..d97059550a2c --- /dev/null +++ b/drivers/irqchip/irq-vt8500.c @@ -0,0 +1,259 @@ +/* + * arch/arm/mach-vt8500/irq.c + * + * Copyright (C) 2012 Tony Prisk <linux@prisktech.co.nz> + * Copyright (C) 2010 Alexey Charkov <alchark@gmail.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ + +/* + * This file is copied and modified from the original irq.c provided by + * Alexey Charkov. Minor changes have been made for Device Tree Support. + */ + +#include <linux/slab.h> +#include <linux/io.h> +#include <linux/irq.h> +#include <linux/irqdomain.h> +#include <linux/interrupt.h> +#include <linux/bitops.h> + +#include <linux/of.h> +#include <linux/of_irq.h> +#include <linux/of_address.h> + +#include <asm/irq.h> +#include <asm/exception.h> +#include <asm/mach/irq.h> + +#include "irqchip.h" + +#define VT8500_ICPC_IRQ 0x20 +#define VT8500_ICPC_FIQ 0x24 +#define VT8500_ICDC 0x40 /* Destination Control 64*u32 */ +#define VT8500_ICIS 0x80 /* Interrupt status, 16*u32 */ + +/* ICPC */ +#define ICPC_MASK 0x3F +#define ICPC_ROTATE BIT(6) + +/* IC_DCTR */ +#define ICDC_IRQ 0x00 +#define ICDC_FIQ 0x01 +#define ICDC_DSS0 0x02 +#define ICDC_DSS1 0x03 +#define ICDC_DSS2 0x04 +#define ICDC_DSS3 0x05 +#define ICDC_DSS4 0x06 +#define ICDC_DSS5 0x07 + +#define VT8500_INT_DISABLE 0 +#define VT8500_INT_ENABLE BIT(3) + +#define VT8500_TRIGGER_HIGH 0 +#define VT8500_TRIGGER_RISING BIT(5) +#define VT8500_TRIGGER_FALLING BIT(6) +#define VT8500_EDGE ( VT8500_TRIGGER_RISING \ + | VT8500_TRIGGER_FALLING) + +/* vt8500 has 1 intc, wm8505 and wm8650 have 2 */ +#define VT8500_INTC_MAX 2 + +struct vt8500_irq_data { + void __iomem *base; /* IO Memory base address */ + struct irq_domain *domain; /* Domain for this controller */ +}; + +/* Global variable for accessing io-mem addresses */ +static struct vt8500_irq_data intc[VT8500_INTC_MAX]; +static u32 active_cnt = 0; + +static void vt8500_irq_mask(struct irq_data *d) +{ + struct vt8500_irq_data *priv = d->domain->host_data; + void __iomem *base = priv->base; + void __iomem *stat_reg = base + VT8500_ICIS + (d->hwirq < 32 ? 0 : 4); + u8 edge, dctr; + u32 status; + + edge = readb(base + VT8500_ICDC + d->hwirq) & VT8500_EDGE; + if (edge) { + status = readl(stat_reg); + + status |= (1 << (d->hwirq & 0x1f)); + writel(status, stat_reg); + } else { + dctr = readb(base + VT8500_ICDC + d->hwirq); + dctr &= ~VT8500_INT_ENABLE; + writeb(dctr, base + VT8500_ICDC + d->hwirq); + } +} + +static void vt8500_irq_unmask(struct irq_data *d) +{ + struct vt8500_irq_data *priv = d->domain->host_data; + void __iomem *base = priv->base; + u8 dctr; + + dctr = readb(base + VT8500_ICDC + d->hwirq); + dctr |= VT8500_INT_ENABLE; + writeb(dctr, base + VT8500_ICDC + d->hwirq); +} + +static int vt8500_irq_set_type(struct irq_data *d, unsigned int flow_type) +{ + struct vt8500_irq_data *priv = d->domain->host_data; + void __iomem *base = priv->base; + u8 dctr; + + dctr = readb(base + VT8500_ICDC + d->hwirq); + dctr &= ~VT8500_EDGE; + + switch (flow_type) { + case IRQF_TRIGGER_LOW: + return -EINVAL; + case IRQF_TRIGGER_HIGH: + dctr |= VT8500_TRIGGER_HIGH; + __irq_set_handler_locked(d->irq, handle_level_irq); + break; + case IRQF_TRIGGER_FALLING: + dctr |= VT8500_TRIGGER_FALLING; + __irq_set_handler_locked(d->irq, handle_edge_irq); + break; + case IRQF_TRIGGER_RISING: + dctr |= VT8500_TRIGGER_RISING; + __irq_set_handler_locked(d->irq, handle_edge_irq); + break; + } + writeb(dctr, base + VT8500_ICDC + d->hwirq); + + return 0; +} + +static struct irq_chip vt8500_irq_chip = { + .name = "vt8500", + .irq_ack = vt8500_irq_mask, + .irq_mask = vt8500_irq_mask, + .irq_unmask = vt8500_irq_unmask, + .irq_set_type = vt8500_irq_set_type, +}; + +static void __init vt8500_init_irq_hw(void __iomem *base) +{ + u32 i; + + /* Enable rotating priority for IRQ */ + writel(ICPC_ROTATE, base + VT8500_ICPC_IRQ); + writel(0x00, base + VT8500_ICPC_FIQ); + + /* Disable all interrupts and route them to IRQ */ + for (i = 0; i < 64; i++) + writeb(VT8500_INT_DISABLE | ICDC_IRQ, base + VT8500_ICDC + i); +} + +static int vt8500_irq_map(struct irq_domain *h, unsigned int virq, + irq_hw_number_t hw) +{ + irq_set_chip_and_handler(virq, &vt8500_irq_chip, handle_level_irq); + set_irq_flags(virq, IRQF_VALID); + + return 0; +} + +static struct irq_domain_ops vt8500_irq_domain_ops = { + .map = vt8500_irq_map, + .xlate = irq_domain_xlate_onecell, +}; + +asmlinkage void __exception_irq_entry vt8500_handle_irq(struct pt_regs *regs) +{ + u32 stat, i; + int irqnr, virq; + void __iomem *base; + + /* Loop through each active controller */ + for (i=0; i<active_cnt; i++) { + base = intc[i].base; + irqnr = readl_relaxed(base) & 0x3F; + /* + Highest Priority register default = 63, so check that this + is a real interrupt by checking the status register + */ + if (irqnr == 63) { + stat = readl_relaxed(base + VT8500_ICIS + 4); + if (!(stat & BIT(31))) + continue; + } + + virq = irq_find_mapping(intc[i].domain, irqnr); + handle_IRQ(virq, regs); + } +} + +int __init vt8500_irq_init(struct device_node *node, struct device_node *parent) +{ + int irq, i; + struct device_node *np = node; + + if (active_cnt == VT8500_INTC_MAX) { + pr_err("%s: Interrupt controllers > VT8500_INTC_MAX\n", + __func__); + goto out; + } + + intc[active_cnt].base = of_iomap(np, 0); + intc[active_cnt].domain = irq_domain_add_linear(node, 64, + &vt8500_irq_domain_ops, &intc[active_cnt]); + + if (!intc[active_cnt].base) { + pr_err("%s: Unable to map IO memory\n", __func__); + goto out; + } + + if (!intc[active_cnt].domain) { + pr_err("%s: Unable to add irq domain!\n", __func__); + goto out; + } + + set_handle_irq(vt8500_handle_irq); + + vt8500_init_irq_hw(intc[active_cnt].base); + + pr_info("vt8500-irq: Added interrupt controller\n"); + + active_cnt++; + + /* check if this is a slaved controller */ + if (of_irq_count(np) != 0) { + /* check that we have the correct number of interrupts */ + if (of_irq_count(np) != 8) { + pr_err("%s: Incorrect IRQ map for slaved controller\n", + __func__); + return -EINVAL; + } + + for (i = 0; i < 8; i++) { + irq = irq_of_parse_and_map(np, i); + enable_irq(irq); + } + + pr_info("vt8500-irq: Enabled slave->parent interrupts\n"); + } +out: + return 0; +} + +IRQCHIP_DECLARE(vt8500_irq, "via,vt8500-intc", vt8500_irq_init); |