diff options
Diffstat (limited to 'drivers/irqchip')
| -rw-r--r-- | drivers/irqchip/Kconfig | 8 | ||||
| -rw-r--r-- | drivers/irqchip/Makefile | 3 | ||||
| -rw-r--r-- | drivers/irqchip/exynos-combiner.c | 15 | ||||
| -rw-r--r-- | drivers/irqchip/irq-dw-apb-ictl.c | 150 | ||||
| -rw-r--r-- | drivers/irqchip/irq-gic.c | 9 | ||||
| -rw-r--r-- | drivers/irqchip/irq-renesas-intc-irqpin.c | 8 | ||||
| -rw-r--r-- | drivers/irqchip/irq-renesas-irqc.c | 21 | ||||
| -rw-r--r-- | drivers/irqchip/irq-sirfsoc.c | 3 | ||||
| -rw-r--r-- | drivers/irqchip/irq-versatile-fpga.c | 15 | ||||
| -rw-r--r-- | drivers/irqchip/irq-xtensa-mx.c | 164 | ||||
| -rw-r--r-- | drivers/irqchip/irq-xtensa-pic.c | 108 |
11 files changed, 469 insertions, 35 deletions
diff --git a/drivers/irqchip/Kconfig b/drivers/irqchip/Kconfig index 3792a1aa52b8..61ffdca96e25 100644 --- a/drivers/irqchip/Kconfig +++ b/drivers/irqchip/Kconfig @@ -30,6 +30,10 @@ config ARM_VIC_NR The maximum number of VICs available in the system, for power management. +config DW_APB_ICTL + bool + select IRQ_DOMAIN + config IMGPDC_IRQ bool select GENERIC_IRQ_CHIP @@ -61,3 +65,7 @@ config VERSATILE_FPGA_IRQ_NR int default 4 depends on VERSATILE_FPGA_IRQ + +config XTENSA_MX + bool + select IRQ_DOMAIN diff --git a/drivers/irqchip/Makefile b/drivers/irqchip/Makefile index c60b9010b152..86b484cb3ec2 100644 --- a/drivers/irqchip/Makefile +++ b/drivers/irqchip/Makefile @@ -6,6 +6,7 @@ obj-$(CONFIG_ARCH_MMP) += irq-mmp.o obj-$(CONFIG_ARCH_MVEBU) += irq-armada-370-xp.o obj-$(CONFIG_ARCH_MXS) += irq-mxs.o obj-$(CONFIG_ARCH_S3C24XX) += irq-s3c24xx.o +obj-$(CONFIG_DW_APB_ICTL) += irq-dw-apb-ictl.o obj-$(CONFIG_METAG) += irq-metag-ext.o obj-$(CONFIG_METAG_PERFCOUNTER_IRQS) += irq-metag.o obj-$(CONFIG_ARCH_MOXART) += irq-moxart.o @@ -22,3 +23,5 @@ obj-$(CONFIG_RENESAS_IRQC) += irq-renesas-irqc.o obj-$(CONFIG_VERSATILE_FPGA_IRQ) += irq-versatile-fpga.o obj-$(CONFIG_ARCH_VT8500) += irq-vt8500.o obj-$(CONFIG_TB10X_IRQC) += irq-tb10x.o +obj-$(CONFIG_XTENSA) += irq-xtensa-pic.o +obj-$(CONFIG_XTENSA_MX) += irq-xtensa-mx.o diff --git a/drivers/irqchip/exynos-combiner.c b/drivers/irqchip/exynos-combiner.c index 868ed40cb6bf..40e6440348ff 100644 --- a/drivers/irqchip/exynos-combiner.c +++ b/drivers/irqchip/exynos-combiner.c @@ -171,8 +171,7 @@ static struct irq_domain_ops combiner_irq_domain_ops = { static void __init combiner_init(void __iomem *combiner_base, struct device_node *np, - unsigned int max_nr, - int irq_base) + unsigned int max_nr) { int i, irq; unsigned int nr_irq; @@ -186,7 +185,7 @@ static void __init combiner_init(void __iomem *combiner_base, return; } - combiner_irq_domain = irq_domain_add_simple(np, nr_irq, irq_base, + combiner_irq_domain = irq_domain_add_linear(np, nr_irq, &combiner_irq_domain_ops, combiner_data); if (WARN_ON(!combiner_irq_domain)) { pr_warning("%s: irq domain init failed\n", __func__); @@ -207,7 +206,6 @@ static int __init combiner_of_init(struct device_node *np, { void __iomem *combiner_base; unsigned int max_nr = 20; - int irq_base = -1; combiner_base = of_iomap(np, 0); if (!combiner_base) { @@ -221,14 +219,7 @@ static int __init combiner_of_init(struct device_node *np, __func__, max_nr); } - /* - * FIXME: This is a hardwired COMBINER_IRQ(0,0). Once all devices - * get their IRQ from DT, remove this in order to get dynamic - * allocation. - */ - irq_base = 160; - - combiner_init(combiner_base, np, max_nr, irq_base); + combiner_init(combiner_base, np, max_nr); return 0; } diff --git a/drivers/irqchip/irq-dw-apb-ictl.c b/drivers/irqchip/irq-dw-apb-ictl.c new file mode 100644 index 000000000000..31e231e1f566 --- /dev/null +++ b/drivers/irqchip/irq-dw-apb-ictl.c @@ -0,0 +1,150 @@ +/* + * Synopsys DW APB ICTL irqchip driver. + * + * Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com> + * + * based on GPL'ed 2.6 kernel sources + * (c) Marvell International Ltd. + * + * 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/irqchip/chained_irq.h> +#include <linux/of_address.h> +#include <linux/of_irq.h> + +#include "irqchip.h" + +#define APB_INT_ENABLE_L 0x00 +#define APB_INT_ENABLE_H 0x04 +#define APB_INT_MASK_L 0x08 +#define APB_INT_MASK_H 0x0c +#define APB_INT_FINALSTATUS_L 0x30 +#define APB_INT_FINALSTATUS_H 0x34 + +static void dw_apb_ictl_handler(unsigned int irq, struct irq_desc *desc) +{ + struct irq_chip *chip = irq_get_chip(irq); + struct irq_chip_generic *gc = irq_get_handler_data(irq); + struct irq_domain *d = gc->private; + u32 stat; + int n; + + chained_irq_enter(chip, desc); + + for (n = 0; n < gc->num_ct; n++) { + stat = readl_relaxed(gc->reg_base + + APB_INT_FINALSTATUS_L + 4 * n); + while (stat) { + u32 hwirq = ffs(stat) - 1; + generic_handle_irq(irq_find_mapping(d, + gc->irq_base + hwirq + 32 * n)); + stat &= ~(1 << hwirq); + } + } + + chained_irq_exit(chip, desc); +} + +static int __init dw_apb_ictl_init(struct device_node *np, + struct device_node *parent) +{ + unsigned int clr = IRQ_NOREQUEST | IRQ_NOPROBE | IRQ_NOAUTOEN; + struct resource r; + struct irq_domain *domain; + struct irq_chip_generic *gc; + void __iomem *iobase; + int ret, nrirqs, irq; + u32 reg; + + /* Map the parent interrupt for the chained handler */ + irq = irq_of_parse_and_map(np, 0); + if (irq <= 0) { + pr_err("%s: unable to parse irq\n", np->full_name); + return -EINVAL; + } + + ret = of_address_to_resource(np, 0, &r); + if (ret) { + pr_err("%s: unable to get resource\n", np->full_name); + return ret; + } + + if (!request_mem_region(r.start, resource_size(&r), np->full_name)) { + pr_err("%s: unable to request mem region\n", np->full_name); + return -ENOMEM; + } + + iobase = ioremap(r.start, resource_size(&r)); + if (!iobase) { + pr_err("%s: unable to map resource\n", np->full_name); + ret = -ENOMEM; + goto err_release; + } + + /* + * DW IP can be configured to allow 2-64 irqs. We can determine + * the number of irqs supported by writing into enable register + * and look for bits not set, as corresponding flip-flops will + * have been removed by sythesis tool. + */ + + /* mask and enable all interrupts */ + writel(~0, iobase + APB_INT_MASK_L); + writel(~0, iobase + APB_INT_MASK_H); + writel(~0, iobase + APB_INT_ENABLE_L); + writel(~0, iobase + APB_INT_ENABLE_H); + + reg = readl(iobase + APB_INT_ENABLE_H); + if (reg) + nrirqs = 32 + fls(reg); + else + nrirqs = fls(readl(iobase + APB_INT_ENABLE_L)); + + domain = irq_domain_add_linear(np, nrirqs, + &irq_generic_chip_ops, NULL); + if (!domain) { + pr_err("%s: unable to add irq domain\n", np->full_name); + ret = -ENOMEM; + goto err_unmap; + } + + ret = irq_alloc_domain_generic_chips(domain, 32, (nrirqs > 32) ? 2 : 1, + np->name, handle_level_irq, clr, 0, + IRQ_GC_INIT_MASK_CACHE); + if (ret) { + pr_err("%s: unable to alloc irq domain gc\n", np->full_name); + goto err_unmap; + } + + gc = irq_get_domain_generic_chip(domain, 0); + gc->private = domain; + gc->reg_base = iobase; + + gc->chip_types[0].regs.mask = APB_INT_MASK_L; + gc->chip_types[0].chip.irq_mask = irq_gc_mask_set_bit; + gc->chip_types[0].chip.irq_unmask = irq_gc_mask_clr_bit; + + if (nrirqs > 32) { + gc->chip_types[1].regs.mask = APB_INT_MASK_H; + gc->chip_types[1].chip.irq_mask = irq_gc_mask_set_bit; + gc->chip_types[1].chip.irq_unmask = irq_gc_mask_clr_bit; + } + + irq_set_handler_data(irq, gc); + irq_set_chained_handler(irq, dw_apb_ictl_handler); + + return 0; + +err_unmap: + iounmap(iobase); +err_release: + release_mem_region(r.start, resource_size(&r)); + return ret; +} +IRQCHIP_DECLARE(dw_apb_ictl, + "snps,dw-apb-ictl", dw_apb_ictl_init); diff --git a/drivers/irqchip/irq-gic.c b/drivers/irqchip/irq-gic.c index 9031171c141b..341c6016812d 100644 --- a/drivers/irqchip/irq-gic.c +++ b/drivers/irqchip/irq-gic.c @@ -957,12 +957,13 @@ void __init gic_init_bases(unsigned int gic_nr, int irq_start, if (WARN_ON(!gic->domain)) return; + if (gic_nr == 0) { #ifdef CONFIG_SMP - set_smp_cross_call(gic_raise_softirq); - register_cpu_notifier(&gic_cpu_notifier); + set_smp_cross_call(gic_raise_softirq); + register_cpu_notifier(&gic_cpu_notifier); #endif - - set_handle_irq(gic_handle_irq); + set_handle_irq(gic_handle_irq); + } gic_chip.flags |= gic_arch_extn.flags; gic_dist_init(gic); diff --git a/drivers/irqchip/irq-renesas-intc-irqpin.c b/drivers/irqchip/irq-renesas-intc-irqpin.c index 82cec63a9011..3ee78f02e5d7 100644 --- a/drivers/irqchip/irq-renesas-intc-irqpin.c +++ b/drivers/irqchip/irq-renesas-intc-irqpin.c @@ -149,8 +149,9 @@ static void intc_irqpin_read_modify_write(struct intc_irqpin_priv *p, 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 */ + /* The PRIO register is assumed to be 32-bit with fixed 4-bit fields. */ + int bitfield_width = 4; + int shift = 32 - (irq + 1) * bitfield_width; intc_irqpin_read_modify_write(p, INTC_IRQPIN_REG_PRIO, shift, bitfield_width, @@ -159,8 +160,9 @@ static void intc_irqpin_mask_unmask_prio(struct intc_irqpin_priv *p, static int intc_irqpin_set_sense(struct intc_irqpin_priv *p, int irq, int value) { + /* The SENSE register is assumed to be 32-bit. */ int bitfield_width = p->config.sense_bitfield_width; - int shift = (7 - irq) * bitfield_width; /* SENSE assumed to be 32-bit */ + int shift = 32 - (irq + 1) * bitfield_width; dev_dbg(&p->pdev->dev, "sense irq = %d, mode = %d\n", irq, value); diff --git a/drivers/irqchip/irq-renesas-irqc.c b/drivers/irqchip/irq-renesas-irqc.c index 2f404ba61c6c..8777065012a5 100644 --- a/drivers/irqchip/irq-renesas-irqc.c +++ b/drivers/irqchip/irq-renesas-irqc.c @@ -81,15 +81,12 @@ static void irqc_irq_disable(struct irq_data *d) 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 */ + [IRQ_TYPE_LEVEL_LOW] = 0x01, + [IRQ_TYPE_LEVEL_HIGH] = 0x02, + [IRQ_TYPE_EDGE_FALLING] = 0x04, /* Synchronous */ + [IRQ_TYPE_EDGE_RISING] = 0x08, /* Synchronous */ + [IRQ_TYPE_EDGE_BOTH] = 0x0c, /* Synchronous */ }; static int irqc_irq_set_type(struct irq_data *d, unsigned int type) @@ -101,12 +98,12 @@ static int irqc_irq_set_type(struct irq_data *d, unsigned int type) irqc_dbg(&p->irq[hw_irq], "sense"); - if (!(value & INTC_IRQ_SENSE_VALID)) + if (!value) return -EINVAL; tmp = ioread32(p->iomem + IRQC_CONFIG(hw_irq)); tmp &= ~0x3f; - tmp |= value ^ INTC_IRQ_SENSE_VALID; + tmp |= value; iowrite32(tmp, p->iomem + IRQC_CONFIG(hw_irq)); return 0; } @@ -212,10 +209,8 @@ static int irqc_probe(struct platform_device *pdev) 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; + irq_chip->flags = IRQCHIP_SKIP_SET_WAKE | IRQCHIP_MASK_ON_SUSPEND; p->irq_domain = irq_domain_add_simple(pdev->dev.of_node, p->number_of_irqs, diff --git a/drivers/irqchip/irq-sirfsoc.c b/drivers/irqchip/irq-sirfsoc.c index 4851afae38dc..3a070c587ed9 100644 --- a/drivers/irqchip/irq-sirfsoc.c +++ b/drivers/irqchip/irq-sirfsoc.c @@ -34,9 +34,10 @@ sirfsoc_alloc_gc(void __iomem *base, unsigned int irq_start, unsigned int num) struct irq_chip_type *ct; int ret; unsigned int clr = IRQ_NOREQUEST | IRQ_NOPROBE | IRQ_NOAUTOEN; + unsigned int set = IRQ_LEVEL; ret = irq_alloc_domain_generic_chips(sirfsoc_irqdomain, num, 1, "irq_sirfsoc", - handle_level_irq, clr, 0, IRQ_GC_INIT_MASK_CACHE); + handle_level_irq, clr, set, IRQ_GC_INIT_MASK_CACHE); gc = irq_get_domain_generic_chip(sirfsoc_irqdomain, irq_start); gc->reg_base = base; diff --git a/drivers/irqchip/irq-versatile-fpga.c b/drivers/irqchip/irq-versatile-fpga.c index 47a52ab580d8..3ae2bb8d9cf2 100644 --- a/drivers/irqchip/irq-versatile-fpga.c +++ b/drivers/irqchip/irq-versatile-fpga.c @@ -9,6 +9,7 @@ #include <linux/module.h> #include <linux/of.h> #include <linux/of_address.h> +#include <linux/of_irq.h> #include <asm/exception.h> #include <asm/mach/irq.h> @@ -167,8 +168,12 @@ void __init fpga_irq_init(void __iomem *base, const char *name, int irq_start, f->used_irqs++; } - pr_info("FPGA IRQ chip %d \"%s\" @ %p, %u irqs\n", + pr_info("FPGA IRQ chip %d \"%s\" @ %p, %u irqs", fpga_irq_id, name, base, f->used_irqs); + if (parent_irq != -1) + pr_cont(", parent IRQ: %d\n", parent_irq); + else + pr_cont("\n"); fpga_irq_id++; } @@ -180,6 +185,7 @@ int __init fpga_irq_of_init(struct device_node *node, void __iomem *base; u32 clear_mask; u32 valid_mask; + int parent_irq; if (WARN_ON(!node)) return -ENODEV; @@ -193,7 +199,12 @@ int __init fpga_irq_of_init(struct device_node *node, if (of_property_read_u32(node, "valid-mask", &valid_mask)) valid_mask = 0; - fpga_irq_init(base, node->name, 0, -1, valid_mask, node); + /* Some chips are cascaded from a parent IRQ */ + parent_irq = irq_of_parse_and_map(node, 0); + if (!parent_irq) + parent_irq = -1; + + fpga_irq_init(base, node->name, 0, parent_irq, valid_mask, node); writel(clear_mask, base + IRQ_ENABLE_CLEAR); writel(clear_mask, base + FIQ_ENABLE_CLEAR); diff --git a/drivers/irqchip/irq-xtensa-mx.c b/drivers/irqchip/irq-xtensa-mx.c new file mode 100644 index 000000000000..f693f1bc1348 --- /dev/null +++ b/drivers/irqchip/irq-xtensa-mx.c @@ -0,0 +1,164 @@ +/* + * Xtensa MX interrupt distributor + * + * Copyright (C) 2002 - 2013 Tensilica, Inc. + * + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + */ + +#include <linux/interrupt.h> +#include <linux/irqdomain.h> +#include <linux/irq.h> +#include <linux/of.h> + +#include <asm/mxregs.h> + +#include "irqchip.h" + +#define HW_IRQ_IPI_COUNT 2 +#define HW_IRQ_MX_BASE 2 +#define HW_IRQ_EXTERN_BASE 3 + +static DEFINE_PER_CPU(unsigned int, cached_irq_mask); + +static int xtensa_mx_irq_map(struct irq_domain *d, unsigned int irq, + irq_hw_number_t hw) +{ + if (hw < HW_IRQ_IPI_COUNT) { + struct irq_chip *irq_chip = d->host_data; + irq_set_chip_and_handler_name(irq, irq_chip, + handle_percpu_irq, "ipi"); + irq_set_status_flags(irq, IRQ_LEVEL); + return 0; + } + return xtensa_irq_map(d, irq, hw); +} + +/* + * Device Tree IRQ specifier translation function which works with one or + * two cell bindings. First cell value maps directly to the hwirq number. + * Second cell if present specifies whether hwirq number is external (1) or + * internal (0). + */ +static int xtensa_mx_irq_domain_xlate(struct irq_domain *d, + struct device_node *ctrlr, + const u32 *intspec, unsigned int intsize, + unsigned long *out_hwirq, unsigned int *out_type) +{ + return xtensa_irq_domain_xlate(intspec, intsize, + intspec[0], intspec[0] + HW_IRQ_EXTERN_BASE, + out_hwirq, out_type); +} + +static const struct irq_domain_ops xtensa_mx_irq_domain_ops = { + .xlate = xtensa_mx_irq_domain_xlate, + .map = xtensa_mx_irq_map, +}; + +void secondary_init_irq(void) +{ + __this_cpu_write(cached_irq_mask, + XCHAL_INTTYPE_MASK_EXTERN_EDGE | + XCHAL_INTTYPE_MASK_EXTERN_LEVEL); + set_sr(XCHAL_INTTYPE_MASK_EXTERN_EDGE | + XCHAL_INTTYPE_MASK_EXTERN_LEVEL, intenable); +} + +static void xtensa_mx_irq_mask(struct irq_data *d) +{ + unsigned int mask = 1u << d->hwirq; + + if (mask & (XCHAL_INTTYPE_MASK_EXTERN_EDGE | + XCHAL_INTTYPE_MASK_EXTERN_LEVEL)) { + set_er(1u << (xtensa_get_ext_irq_no(d->hwirq) - + HW_IRQ_MX_BASE), MIENG); + } else { + mask = __this_cpu_read(cached_irq_mask) & ~mask; + __this_cpu_write(cached_irq_mask, mask); + set_sr(mask, intenable); + } +} + +static void xtensa_mx_irq_unmask(struct irq_data *d) +{ + unsigned int mask = 1u << d->hwirq; + + if (mask & (XCHAL_INTTYPE_MASK_EXTERN_EDGE | + XCHAL_INTTYPE_MASK_EXTERN_LEVEL)) { + set_er(1u << (xtensa_get_ext_irq_no(d->hwirq) - + HW_IRQ_MX_BASE), MIENGSET); + } else { + mask |= __this_cpu_read(cached_irq_mask); + __this_cpu_write(cached_irq_mask, mask); + set_sr(mask, intenable); + } +} + +static void xtensa_mx_irq_enable(struct irq_data *d) +{ + variant_irq_enable(d->hwirq); + xtensa_mx_irq_unmask(d); +} + +static void xtensa_mx_irq_disable(struct irq_data *d) +{ + xtensa_mx_irq_mask(d); + variant_irq_disable(d->hwirq); +} + +static void xtensa_mx_irq_ack(struct irq_data *d) +{ + set_sr(1 << d->hwirq, intclear); +} + +static int xtensa_mx_irq_retrigger(struct irq_data *d) +{ + set_sr(1 << d->hwirq, intset); + return 1; +} + +static int xtensa_mx_irq_set_affinity(struct irq_data *d, + const struct cpumask *dest, bool force) +{ + unsigned mask = 1u << cpumask_any(dest); + + set_er(mask, MIROUT(d->hwirq - HW_IRQ_MX_BASE)); + return 0; + +} + +static struct irq_chip xtensa_mx_irq_chip = { + .name = "xtensa-mx", + .irq_enable = xtensa_mx_irq_enable, + .irq_disable = xtensa_mx_irq_disable, + .irq_mask = xtensa_mx_irq_mask, + .irq_unmask = xtensa_mx_irq_unmask, + .irq_ack = xtensa_mx_irq_ack, + .irq_retrigger = xtensa_mx_irq_retrigger, + .irq_set_affinity = xtensa_mx_irq_set_affinity, +}; + +int __init xtensa_mx_init_legacy(struct device_node *interrupt_parent) +{ + struct irq_domain *root_domain = + irq_domain_add_legacy(NULL, NR_IRQS, 0, 0, + &xtensa_mx_irq_domain_ops, + &xtensa_mx_irq_chip); + irq_set_default_host(root_domain); + secondary_init_irq(); + return 0; +} + +static int __init xtensa_mx_init(struct device_node *np, + struct device_node *interrupt_parent) +{ + struct irq_domain *root_domain = + irq_domain_add_linear(np, NR_IRQS, &xtensa_mx_irq_domain_ops, + &xtensa_mx_irq_chip); + irq_set_default_host(root_domain); + secondary_init_irq(); + return 0; +} +IRQCHIP_DECLARE(xtensa_mx_irq_chip, "cdns,xtensa-mx", xtensa_mx_init); diff --git a/drivers/irqchip/irq-xtensa-pic.c b/drivers/irqchip/irq-xtensa-pic.c new file mode 100644 index 000000000000..7d71126d1ce5 --- /dev/null +++ b/drivers/irqchip/irq-xtensa-pic.c @@ -0,0 +1,108 @@ +/* + * Xtensa built-in interrupt controller + * + * Copyright (C) 2002 - 2013 Tensilica, Inc. + * Copyright (C) 1992, 1998 Linus Torvalds, Ingo Molnar + * + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + * + * Chris Zankel <chris@zankel.net> + * Kevin Chea + */ + +#include <linux/interrupt.h> +#include <linux/irqdomain.h> +#include <linux/irq.h> +#include <linux/of.h> + +#include "irqchip.h" + +unsigned int cached_irq_mask; + +/* + * Device Tree IRQ specifier translation function which works with one or + * two cell bindings. First cell value maps directly to the hwirq number. + * Second cell if present specifies whether hwirq number is external (1) or + * internal (0). + */ +static int xtensa_pic_irq_domain_xlate(struct irq_domain *d, + struct device_node *ctrlr, + const u32 *intspec, unsigned int intsize, + unsigned long *out_hwirq, unsigned int *out_type) +{ + return xtensa_irq_domain_xlate(intspec, intsize, + intspec[0], intspec[0], + out_hwirq, out_type); +} + +static const struct irq_domain_ops xtensa_irq_domain_ops = { + .xlate = xtensa_pic_irq_domain_xlate, + .map = xtensa_irq_map, +}; + +static void xtensa_irq_mask(struct irq_data *d) +{ + cached_irq_mask &= ~(1 << d->hwirq); + set_sr(cached_irq_mask, intenable); +} + +static void xtensa_irq_unmask(struct irq_data *d) +{ + cached_irq_mask |= 1 << d->hwirq; + set_sr(cached_irq_mask, intenable); +} + +static void xtensa_irq_enable(struct irq_data *d) +{ + variant_irq_enable(d->hwirq); + xtensa_irq_unmask(d); +} + +static void xtensa_irq_disable(struct irq_data *d) +{ + xtensa_irq_mask(d); + variant_irq_disable(d->hwirq); +} + +static void xtensa_irq_ack(struct irq_data *d) +{ + set_sr(1 << d->hwirq, intclear); +} + +static int xtensa_irq_retrigger(struct irq_data *d) +{ + set_sr(1 << d->hwirq, intset); + return 1; +} + +static struct irq_chip xtensa_irq_chip = { + .name = "xtensa", + .irq_enable = xtensa_irq_enable, + .irq_disable = xtensa_irq_disable, + .irq_mask = xtensa_irq_mask, + .irq_unmask = xtensa_irq_unmask, + .irq_ack = xtensa_irq_ack, + .irq_retrigger = xtensa_irq_retrigger, +}; + +int __init xtensa_pic_init_legacy(struct device_node *interrupt_parent) +{ + struct irq_domain *root_domain = + irq_domain_add_legacy(NULL, NR_IRQS, 0, 0, + &xtensa_irq_domain_ops, &xtensa_irq_chip); + irq_set_default_host(root_domain); + return 0; +} + +static int __init xtensa_pic_init(struct device_node *np, + struct device_node *interrupt_parent) +{ + struct irq_domain *root_domain = + irq_domain_add_linear(np, NR_IRQS, &xtensa_irq_domain_ops, + &xtensa_irq_chip); + irq_set_default_host(root_domain); + return 0; +} +IRQCHIP_DECLARE(xtensa_irq_chip, "cdns,xtensa-pic", xtensa_pic_init); |