diff options
Diffstat (limited to 'drivers/irqchip')
| -rw-r--r-- | drivers/irqchip/Kconfig | 8 | ||||
| -rw-r--r-- | drivers/irqchip/Makefile | 4 | ||||
| -rw-r--r-- | drivers/irqchip/exynos-combiner.c | 15 | ||||
| -rw-r--r-- | drivers/irqchip/irq-armada-370-xp.c | 8 | ||||
| -rw-r--r-- | drivers/irqchip/irq-dw-apb-ictl.c | 150 | ||||
| -rw-r--r-- | drivers/irqchip/irq-metag-ext.c | 2 | ||||
| -rw-r--r-- | drivers/irqchip/irq-metag.c | 2 | ||||
| -rw-r--r-- | drivers/irqchip/irq-orion.c | 22 | ||||
| -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 | ||||
| -rw-r--r-- | drivers/irqchip/irq-zevio.c | 127 |
14 files changed, 612 insertions, 37 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..5194afb39e78 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 @@ -20,5 +21,8 @@ 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-$(CONFIG_ARCH_NSPIRE) += irq-zevio.o obj-$(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-armada-370-xp.c b/drivers/irqchip/irq-armada-370-xp.c index 433cc8568dec..540956465ed2 100644 --- a/drivers/irqchip/irq-armada-370-xp.c +++ b/drivers/irqchip/irq-armada-370-xp.c @@ -59,8 +59,6 @@ #define PCI_MSI_DOORBELL_END (32) #define PCI_MSI_DOORBELL_MASK 0xFFFF0000 -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; @@ -239,6 +237,8 @@ static inline int armada_370_xp_msi_init(struct device_node *node, #endif #ifdef CONFIG_SMP +static DEFINE_RAW_SPINLOCK(irq_controller_lock); + static int armada_xp_set_affinity(struct irq_data *d, const struct cpumask *mask_val, bool force) { @@ -381,7 +381,7 @@ armada_370_xp_handle_irq(struct pt_regs *regs) ARMADA_370_XP_IN_DRBEL_CAUSE_OFFS) & PCI_MSI_DOORBELL_MASK; - writel(~PCI_MSI_DOORBELL_MASK, per_cpu_int_base + + writel(~msimask, per_cpu_int_base + ARMADA_370_XP_IN_DRBEL_CAUSE_OFFS); for (msinr = PCI_MSI_DOORBELL_START; @@ -407,7 +407,7 @@ armada_370_xp_handle_irq(struct pt_regs *regs) ARMADA_370_XP_IN_DRBEL_CAUSE_OFFS) & IPI_DOORBELL_MASK; - writel(~IPI_DOORBELL_MASK, per_cpu_int_base + + writel(~ipimask, per_cpu_int_base + ARMADA_370_XP_IN_DRBEL_CAUSE_OFFS); /* Handle all pending doorbells */ 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-metag-ext.c b/drivers/irqchip/irq-metag-ext.c index 92c41ab4dbfd..2cb474ad8809 100644 --- a/drivers/irqchip/irq-metag-ext.c +++ b/drivers/irqchip/irq-metag-ext.c @@ -515,7 +515,7 @@ static int meta_intc_set_affinity(struct irq_data *data, * one cpu (the interrupt code doesn't support it), so we just * pick the first cpu we find in 'cpumask'. */ - cpu = cpumask_any(cpumask); + cpu = cpumask_any_and(cpumask, cpu_online_mask); thread = cpu_2_hwthread_id[cpu]; metag_out32(TBI_TRIG_VEC(TBID_SIGNUM_TR2(thread)), vec_addr); diff --git a/drivers/irqchip/irq-metag.c b/drivers/irqchip/irq-metag.c index 8e94d7a3b20d..c16c186d97d3 100644 --- a/drivers/irqchip/irq-metag.c +++ b/drivers/irqchip/irq-metag.c @@ -201,7 +201,7 @@ static int metag_internal_irq_set_affinity(struct irq_data *data, * one cpu (the interrupt code doesn't support it), so we just * pick the first cpu we find in 'cpumask'. */ - cpu = cpumask_any(cpumask); + cpu = cpumask_any_and(cpumask, cpu_online_mask); thread = cpu_2_hwthread_id[cpu]; metag_out32(TBI_TRIG_VEC(TBID_SIGNUM_TR1(thread)), diff --git a/drivers/irqchip/irq-orion.c b/drivers/irqchip/irq-orion.c index e51d40031884..8e41be62812e 100644 --- a/drivers/irqchip/irq-orion.c +++ b/drivers/irqchip/irq-orion.c @@ -111,7 +111,8 @@ IRQCHIP_DECLARE(orion_intc, "marvell,orion-intc", orion_irq_init); static void orion_bridge_irq_handler(unsigned int irq, struct irq_desc *desc) { struct irq_domain *d = irq_get_handler_data(irq); - struct irq_chip_generic *gc = irq_get_domain_generic_chip(d, irq); + + struct irq_chip_generic *gc = irq_get_domain_generic_chip(d, 0); u32 stat = readl_relaxed(gc->reg_base + ORION_BRIDGE_IRQ_CAUSE) & gc->mask_cache; @@ -123,6 +124,19 @@ static void orion_bridge_irq_handler(unsigned int irq, struct irq_desc *desc) } } +/* + * Bridge IRQ_CAUSE is asserted regardless of IRQ_MASK register. + * To avoid interrupt events on stale irqs, we clear them before unmask. + */ +static unsigned int orion_bridge_irq_startup(struct irq_data *d) +{ + struct irq_chip_type *ct = irq_data_get_chip_type(d); + + ct->chip.irq_ack(d); + ct->chip.irq_unmask(d); + return 0; +} + static int __init orion_bridge_irq_init(struct device_node *np, struct device_node *parent) { @@ -143,7 +157,7 @@ static int __init orion_bridge_irq_init(struct device_node *np, } ret = irq_alloc_domain_generic_chips(domain, nrirqs, 1, np->name, - handle_level_irq, clr, 0, IRQ_GC_INIT_MASK_CACHE); + handle_edge_irq, clr, 0, IRQ_GC_INIT_MASK_CACHE); if (ret) { pr_err("%s: unable to alloc irq domain gc\n", np->name); return ret; @@ -176,12 +190,14 @@ static int __init orion_bridge_irq_init(struct device_node *np, gc->chip_types[0].regs.ack = ORION_BRIDGE_IRQ_CAUSE; gc->chip_types[0].regs.mask = ORION_BRIDGE_IRQ_MASK; + gc->chip_types[0].chip.irq_startup = orion_bridge_irq_startup; gc->chip_types[0].chip.irq_ack = irq_gc_ack_clr_bit; gc->chip_types[0].chip.irq_mask = irq_gc_mask_clr_bit; gc->chip_types[0].chip.irq_unmask = irq_gc_mask_set_bit; - /* mask all interrupts */ + /* mask and clear all interrupts */ writel(0, gc->reg_base + ORION_BRIDGE_IRQ_MASK); + writel(0, gc->reg_base + ORION_BRIDGE_IRQ_CAUSE); irq_set_handler_data(irq, domain); irq_set_chained_handler(irq, orion_bridge_irq_handler); 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); diff --git a/drivers/irqchip/irq-zevio.c b/drivers/irqchip/irq-zevio.c new file mode 100644 index 000000000000..8ed04c4a43ee --- /dev/null +++ b/drivers/irqchip/irq-zevio.c @@ -0,0 +1,127 @@ +/* + * linux/drivers/irqchip/irq-zevio.c + * + * Copyright (C) 2013 Daniel Tang <tangrs@tangrs.id.au> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2, as + * published by the Free Software Foundation. + * + */ + +#include <linux/io.h> +#include <linux/irq.h> +#include <linux/of.h> +#include <linux/of_address.h> +#include <linux/of_irq.h> + +#include <asm/mach/irq.h> +#include <asm/exception.h> + +#include "irqchip.h" + +#define IO_STATUS 0x000 +#define IO_RAW_STATUS 0x004 +#define IO_ENABLE 0x008 +#define IO_DISABLE 0x00C +#define IO_CURRENT 0x020 +#define IO_RESET 0x028 +#define IO_MAX_PRIOTY 0x02C + +#define IO_IRQ_BASE 0x000 +#define IO_FIQ_BASE 0x100 + +#define IO_INVERT_SEL 0x200 +#define IO_STICKY_SEL 0x204 +#define IO_PRIORITY_SEL 0x300 + +#define MAX_INTRS 32 +#define FIQ_START MAX_INTRS + +static struct irq_domain *zevio_irq_domain; +static void __iomem *zevio_irq_io; + +static void zevio_irq_ack(struct irq_data *irqd) +{ + struct irq_chip_generic *gc = irq_data_get_irq_chip_data(irqd); + struct irq_chip_regs *regs = + &container_of(irqd->chip, struct irq_chip_type, chip)->regs; + + readl(gc->reg_base + regs->ack); +} + +static asmlinkage void __exception_irq_entry zevio_handle_irq(struct pt_regs *regs) +{ + int irqnr; + + while (readl(zevio_irq_io + IO_STATUS)) { + irqnr = readl(zevio_irq_io + IO_CURRENT); + irqnr = irq_find_mapping(zevio_irq_domain, irqnr); + handle_IRQ(irqnr, regs); + }; +} + +static void __init zevio_init_irq_base(void __iomem *base) +{ + /* Disable all interrupts */ + writel(~0, base + IO_DISABLE); + + /* Accept interrupts of all priorities */ + writel(0xF, base + IO_MAX_PRIOTY); + + /* Reset existing interrupts */ + readl(base + IO_RESET); +} + +static int __init zevio_of_init(struct device_node *node, + struct device_node *parent) +{ + unsigned int clr = IRQ_NOREQUEST | IRQ_NOPROBE | IRQ_NOAUTOEN; + struct irq_chip_generic *gc; + int ret; + + if (WARN_ON(zevio_irq_io || zevio_irq_domain)) + return -EBUSY; + + zevio_irq_io = of_iomap(node, 0); + BUG_ON(!zevio_irq_io); + + /* Do not invert interrupt status bits */ + writel(~0, zevio_irq_io + IO_INVERT_SEL); + + /* Disable sticky interrupts */ + writel(0, zevio_irq_io + IO_STICKY_SEL); + + /* We don't use IRQ priorities. Set each IRQ to highest priority. */ + memset_io(zevio_irq_io + IO_PRIORITY_SEL, 0, MAX_INTRS * sizeof(u32)); + + /* Init IRQ and FIQ */ + zevio_init_irq_base(zevio_irq_io + IO_IRQ_BASE); + zevio_init_irq_base(zevio_irq_io + IO_FIQ_BASE); + + zevio_irq_domain = irq_domain_add_linear(node, MAX_INTRS, + &irq_generic_chip_ops, NULL); + BUG_ON(!zevio_irq_domain); + + ret = irq_alloc_domain_generic_chips(zevio_irq_domain, MAX_INTRS, 1, + "zevio_intc", handle_level_irq, + clr, 0, IRQ_GC_INIT_MASK_CACHE); + BUG_ON(ret); + + gc = irq_get_domain_generic_chip(zevio_irq_domain, 0); + gc->reg_base = zevio_irq_io; + gc->chip_types[0].chip.irq_ack = zevio_irq_ack; + gc->chip_types[0].chip.irq_mask = irq_gc_mask_disable_reg; + gc->chip_types[0].chip.irq_unmask = irq_gc_unmask_enable_reg; + gc->chip_types[0].regs.mask = IO_IRQ_BASE + IO_ENABLE; + gc->chip_types[0].regs.enable = IO_IRQ_BASE + IO_ENABLE; + gc->chip_types[0].regs.disable = IO_IRQ_BASE + IO_DISABLE; + gc->chip_types[0].regs.ack = IO_IRQ_BASE + IO_RESET; + + set_handle_irq(zevio_handle_irq); + + pr_info("TI-NSPIRE classic IRQ controller\n"); + return 0; +} + +IRQCHIP_DECLARE(zevio_irq, "lsi,zevio-intc", zevio_of_init); |