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Based on 2 normalized pattern(s): 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 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 [no]_[pad]_[ctrl] 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 extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 176 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Jilayne Lovejoy <opensource@jilayne.com> Reviewed-by: Steve Winslow <swinslow@gmail.com> Reviewed-by: Allison Randal <allison@lohutok.net> Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190519154040.652910950@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
119 lines
2.7 KiB
C
119 lines
2.7 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* GT641xx IRQ routines.
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*
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* Copyright (C) 2007 Yoichi Yuasa <yuasa@linux-mips.org>
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*/
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#include <linux/hardirq.h>
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#include <linux/init.h>
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#include <linux/irq.h>
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#include <linux/spinlock.h>
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#include <linux/types.h>
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#include <asm/gt64120.h>
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#define GT641XX_IRQ_TO_BIT(irq) (1U << (irq - GT641XX_IRQ_BASE))
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static DEFINE_RAW_SPINLOCK(gt641xx_irq_lock);
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static void ack_gt641xx_irq(struct irq_data *d)
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{
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unsigned long flags;
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u32 cause;
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raw_spin_lock_irqsave(>641xx_irq_lock, flags);
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cause = GT_READ(GT_INTRCAUSE_OFS);
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cause &= ~GT641XX_IRQ_TO_BIT(d->irq);
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GT_WRITE(GT_INTRCAUSE_OFS, cause);
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raw_spin_unlock_irqrestore(>641xx_irq_lock, flags);
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}
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static void mask_gt641xx_irq(struct irq_data *d)
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{
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unsigned long flags;
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u32 mask;
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raw_spin_lock_irqsave(>641xx_irq_lock, flags);
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mask = GT_READ(GT_INTRMASK_OFS);
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mask &= ~GT641XX_IRQ_TO_BIT(d->irq);
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GT_WRITE(GT_INTRMASK_OFS, mask);
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raw_spin_unlock_irqrestore(>641xx_irq_lock, flags);
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}
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static void mask_ack_gt641xx_irq(struct irq_data *d)
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{
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unsigned long flags;
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u32 cause, mask;
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raw_spin_lock_irqsave(>641xx_irq_lock, flags);
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mask = GT_READ(GT_INTRMASK_OFS);
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mask &= ~GT641XX_IRQ_TO_BIT(d->irq);
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GT_WRITE(GT_INTRMASK_OFS, mask);
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cause = GT_READ(GT_INTRCAUSE_OFS);
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cause &= ~GT641XX_IRQ_TO_BIT(d->irq);
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GT_WRITE(GT_INTRCAUSE_OFS, cause);
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raw_spin_unlock_irqrestore(>641xx_irq_lock, flags);
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}
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static void unmask_gt641xx_irq(struct irq_data *d)
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{
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unsigned long flags;
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u32 mask;
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raw_spin_lock_irqsave(>641xx_irq_lock, flags);
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mask = GT_READ(GT_INTRMASK_OFS);
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mask |= GT641XX_IRQ_TO_BIT(d->irq);
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GT_WRITE(GT_INTRMASK_OFS, mask);
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raw_spin_unlock_irqrestore(>641xx_irq_lock, flags);
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}
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static struct irq_chip gt641xx_irq_chip = {
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.name = "GT641xx",
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.irq_ack = ack_gt641xx_irq,
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.irq_mask = mask_gt641xx_irq,
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.irq_mask_ack = mask_ack_gt641xx_irq,
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.irq_unmask = unmask_gt641xx_irq,
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};
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void gt641xx_irq_dispatch(void)
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{
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u32 cause, mask;
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int i;
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cause = GT_READ(GT_INTRCAUSE_OFS);
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mask = GT_READ(GT_INTRMASK_OFS);
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cause &= mask;
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/*
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* bit0 : logical or of all the interrupt bits.
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* bit30: logical or of bits[29:26,20:1].
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* bit31: logical or of bits[25:1].
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*/
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for (i = 1; i < 30; i++) {
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if (cause & (1U << i)) {
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do_IRQ(GT641XX_IRQ_BASE + i);
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return;
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}
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}
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atomic_inc(&irq_err_count);
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}
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void __init gt641xx_irq_init(void)
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{
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int i;
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GT_WRITE(GT_INTRMASK_OFS, 0);
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GT_WRITE(GT_INTRCAUSE_OFS, 0);
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/*
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* bit0 : logical or of all the interrupt bits.
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* bit30: logical or of bits[29:26,20:1].
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* bit31: logical or of bits[25:1].
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*/
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for (i = 1; i < 30; i++)
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irq_set_chip_and_handler(GT641XX_IRQ_BASE + i,
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>641xx_irq_chip, handle_level_irq);
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}
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