diff options
Diffstat (limited to 'arch/xtensa/kernel/irq.c')
| -rw-r--r-- | arch/xtensa/kernel/irq.c | 137 |
1 files changed, 30 insertions, 107 deletions
diff --git a/arch/xtensa/kernel/irq.c b/arch/xtensa/kernel/irq.c index 6f4f974..ada1e48 100644 --- a/arch/xtensa/kernel/irq.c +++ b/arch/xtensa/kernel/irq.c @@ -18,28 +18,20 @@ #include <linux/interrupt.h> #include <linux/irq.h> #include <linux/kernel_stat.h> +#include <linux/irqchip.h> +#include <linux/irqchip/xtensa-pic.h> #include <linux/irqdomain.h> #include <linux/of.h> #include <asm/uaccess.h> #include <asm/platform.h> -static unsigned int cached_irq_mask; - atomic_t irq_err_count; -static struct irq_domain *root_domain; - -/* - * do_IRQ handles all normal device IRQ's (the special - * SMP cross-CPU interrupts have their own specific - * handlers). - */ - asmlinkage void do_IRQ(int hwirq, struct pt_regs *regs) { struct pt_regs *old_regs = set_irq_regs(regs); - int irq = irq_find_mapping(root_domain, hwirq); + int irq = irq_find_mapping(NULL, hwirq); if (hwirq >= NR_IRQS) { printk(KERN_EMERG "%s: cannot handle IRQ %d\n", @@ -74,83 +66,57 @@ int arch_show_interrupts(struct seq_file *p, int prec) return 0; } -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) +int xtensa_irq_domain_xlate(const u32 *intspec, unsigned int intsize, + unsigned long int_irq, unsigned long ext_irq, + unsigned long *out_hwirq, unsigned int *out_type) { - set_sr(1 << d->hwirq, intset); - return 1; + if (WARN_ON(intsize < 1 || intsize > 2)) + return -EINVAL; + if (intsize == 2 && intspec[1] == 1) { + int_irq = xtensa_map_ext_irq(ext_irq); + if (int_irq < XCHAL_NUM_INTERRUPTS) + *out_hwirq = int_irq; + else + return -EINVAL; + } else { + *out_hwirq = int_irq; + } + *out_type = IRQ_TYPE_NONE; + return 0; } -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, -}; - -static int xtensa_irq_map(struct irq_domain *d, unsigned int irq, +int xtensa_irq_map(struct irq_domain *d, unsigned int irq, irq_hw_number_t hw) { + struct irq_chip *irq_chip = d->host_data; u32 mask = 1 << hw; if (mask & XCHAL_INTTYPE_MASK_SOFTWARE) { - irq_set_chip_and_handler_name(irq, &xtensa_irq_chip, + irq_set_chip_and_handler_name(irq, irq_chip, handle_simple_irq, "level"); irq_set_status_flags(irq, IRQ_LEVEL); } else if (mask & XCHAL_INTTYPE_MASK_EXTERN_EDGE) { - irq_set_chip_and_handler_name(irq, &xtensa_irq_chip, + irq_set_chip_and_handler_name(irq, irq_chip, handle_edge_irq, "edge"); irq_clear_status_flags(irq, IRQ_LEVEL); } else if (mask & XCHAL_INTTYPE_MASK_EXTERN_LEVEL) { - irq_set_chip_and_handler_name(irq, &xtensa_irq_chip, + irq_set_chip_and_handler_name(irq, irq_chip, handle_level_irq, "level"); irq_set_status_flags(irq, IRQ_LEVEL); } else if (mask & XCHAL_INTTYPE_MASK_TIMER) { - irq_set_chip_and_handler_name(irq, &xtensa_irq_chip, - handle_edge_irq, "edge"); + irq_set_chip_and_handler_name(irq, irq_chip, + handle_percpu_irq, "timer"); irq_clear_status_flags(irq, IRQ_LEVEL); } else {/* XCHAL_INTTYPE_MASK_WRITE_ERROR */ /* XCHAL_INTTYPE_MASK_NMI */ - - irq_set_chip_and_handler_name(irq, &xtensa_irq_chip, + irq_set_chip_and_handler_name(irq, irq_chip, handle_level_irq, "level"); irq_set_status_flags(irq, IRQ_LEVEL); } return 0; } -static unsigned map_ext_irq(unsigned ext_irq) +unsigned xtensa_map_ext_irq(unsigned ext_irq) { unsigned mask = XCHAL_INTTYPE_MASK_EXTERN_EDGE | XCHAL_INTTYPE_MASK_EXTERN_LEVEL; @@ -163,55 +129,12 @@ static unsigned map_ext_irq(unsigned ext_irq) return XCHAL_NUM_INTERRUPTS; } -/* - * 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). - */ -int xtensa_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) -{ - if (WARN_ON(intsize < 1 || intsize > 2)) - return -EINVAL; - if (intsize == 2 && intspec[1] == 1) { - unsigned int_irq = map_ext_irq(intspec[0]); - if (int_irq < XCHAL_NUM_INTERRUPTS) - *out_hwirq = int_irq; - else - return -EINVAL; - } else { - *out_hwirq = intspec[0]; - } - *out_type = IRQ_TYPE_NONE; - return 0; -} - -static const struct irq_domain_ops xtensa_irq_domain_ops = { - .xlate = xtensa_irq_domain_xlate, - .map = xtensa_irq_map, -}; - void __init init_IRQ(void) { - struct device_node *intc = NULL; - - cached_irq_mask = 0; - set_sr(~0, intclear); - #ifdef CONFIG_OF - /* The interrupt controller device node is mandatory */ - intc = of_find_compatible_node(NULL, NULL, "xtensa,pic"); - BUG_ON(!intc); - - root_domain = irq_domain_add_linear(intc, NR_IRQS, - &xtensa_irq_domain_ops, NULL); + irqchip_init(); #else - root_domain = irq_domain_add_legacy(intc, NR_IRQS, 0, 0, - &xtensa_irq_domain_ops, NULL); + xtensa_pic_init_legacy(NULL); #endif - irq_set_default_host(root_domain); - variant_init_irq(); } |
