diff options
Diffstat (limited to 'arch/arm/mach-sa1100/irq.c')
| -rw-r--r-- | arch/arm/mach-sa1100/irq.c | 177 |
1 files changed, 0 insertions, 177 deletions
diff --git a/arch/arm/mach-sa1100/irq.c b/arch/arm/mach-sa1100/irq.c deleted file mode 100644 index fdec5edbbfd5..000000000000 --- a/arch/arm/mach-sa1100/irq.c +++ /dev/null @@ -1,177 +0,0 @@ -/* - * linux/arch/arm/mach-sa1100/irq.c - * - * Copyright (C) 2015 Dmitry Eremin-Solenikov - * Copyright (C) 1999-2001 Nicolas Pitre - * - * Generic IRQ handling for the SA11x0. - * - * 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/init.h> -#include <linux/module.h> -#include <linux/interrupt.h> -#include <linux/io.h> -#include <linux/irq.h> -#include <linux/irqdomain.h> -#include <linux/syscore_ops.h> -#include <linux/irqchip/irq-sa11x0.h> - -#include <soc/sa1100/pwer.h> - -#include <asm/exception.h> - -#define ICIP 0x00 /* IC IRQ Pending reg. */ -#define ICMR 0x04 /* IC Mask Reg. */ -#define ICLR 0x08 /* IC Level Reg. */ -#define ICCR 0x0C /* IC Control Reg. */ -#define ICFP 0x10 /* IC FIQ Pending reg. */ -#define ICPR 0x20 /* IC Pending Reg. */ - -static void __iomem *iobase; - -/* - * We don't need to ACK IRQs on the SA1100 unless they're GPIOs - * this is for internal IRQs i.e. from IRQ LCD to RTCAlrm. - */ -static void sa1100_mask_irq(struct irq_data *d) -{ - u32 reg; - - reg = readl_relaxed(iobase + ICMR); - reg &= ~BIT(d->hwirq); - writel_relaxed(reg, iobase + ICMR); -} - -static void sa1100_unmask_irq(struct irq_data *d) -{ - u32 reg; - - reg = readl_relaxed(iobase + ICMR); - reg |= BIT(d->hwirq); - writel_relaxed(reg, iobase + ICMR); -} - -static int sa1100_set_wake(struct irq_data *d, unsigned int on) -{ - return sa11x0_sc_set_wake(d->hwirq, on); -} - -static struct irq_chip sa1100_normal_chip = { - .name = "SC", - .irq_ack = sa1100_mask_irq, - .irq_mask = sa1100_mask_irq, - .irq_unmask = sa1100_unmask_irq, - .irq_set_wake = sa1100_set_wake, -}; - -static int sa1100_normal_irqdomain_map(struct irq_domain *d, - unsigned int irq, irq_hw_number_t hwirq) -{ - irq_set_chip_and_handler(irq, &sa1100_normal_chip, - handle_level_irq); - set_irq_flags(irq, IRQF_VALID); - - return 0; -} - -static struct irq_domain_ops sa1100_normal_irqdomain_ops = { - .map = sa1100_normal_irqdomain_map, - .xlate = irq_domain_xlate_onetwocell, -}; - -static struct irq_domain *sa1100_normal_irqdomain; - -static struct sa1100irq_state { - unsigned int saved; - unsigned int icmr; - unsigned int iclr; - unsigned int iccr; -} sa1100irq_state; - -static int sa1100irq_suspend(void) -{ - struct sa1100irq_state *st = &sa1100irq_state; - - st->saved = 1; - st->icmr = readl_relaxed(iobase + ICMR); - st->iclr = readl_relaxed(iobase + ICLR); - st->iccr = readl_relaxed(iobase + ICCR); - - /* - * Disable all GPIO-based interrupts. - */ - writel_relaxed(st->icmr & 0xfffff000, iobase + ICMR); - - return 0; -} - -static void sa1100irq_resume(void) -{ - struct sa1100irq_state *st = &sa1100irq_state; - - if (st->saved) { - writel_relaxed(st->iccr, iobase + ICCR); - writel_relaxed(st->iclr, iobase + ICLR); - - writel_relaxed(st->icmr, iobase + ICMR); - } -} - -static struct syscore_ops sa1100irq_syscore_ops = { - .suspend = sa1100irq_suspend, - .resume = sa1100irq_resume, -}; - -static int __init sa1100irq_init_devicefs(void) -{ - register_syscore_ops(&sa1100irq_syscore_ops); - return 0; -} - -device_initcall(sa1100irq_init_devicefs); - -static asmlinkage void __exception_irq_entry -sa1100_handle_irq(struct pt_regs *regs) -{ - uint32_t icip, icmr, mask; - - do { - icip = readl_relaxed(iobase + ICIP); - icmr = readl_relaxed(iobase + ICMR); - mask = icip & icmr; - - if (mask == 0) - break; - - handle_domain_irq(sa1100_normal_irqdomain, - ffs(mask) - 1, regs); - } while (1); -} - -void __init sa11x0_init_irq_nodt(int irq_start, resource_size_t io_start) -{ - iobase = ioremap(io_start, SZ_64K); - if (WARN_ON(!iobase)) - return; - - /* disable all IRQs */ - writel_relaxed(0, iobase + ICMR); - - /* all IRQs are IRQ, not FIQ */ - writel_relaxed(0, iobase + ICLR); - - /* - * Whatever the doc says, this has to be set for the wait-on-irq - * instruction to work... on a SA1100 rev 9 at least. - */ - writel_relaxed(1, iobase + ICCR); - - sa1100_normal_irqdomain = irq_domain_add_simple(NULL, - 32, irq_start, - &sa1100_normal_irqdomain_ops, NULL); - - set_handle_irq(sa1100_handle_irq); -} |