0feb96de5d
Changes in 4.9.166 mmc: pxamci: fix enum type confusion drm/vmwgfx: Don't double-free the mode stored in par->set_mode iommu/amd: fix sg->dma_address for sg->offset bigger than PAGE_SIZE libceph: wait for latest osdmap in ceph_monc_blacklist_add() udf: Fix crash on IO error during truncate mips: loongson64: lemote-2f: Add IRQF_NO_SUSPEND to "cascade" irqaction. MIPS: Ensure ELF appended dtb is relocated MIPS: Fix kernel crash for R6 in jump label branch function futex: Ensure that futex address is aligned in handle_futex_death() objtool: Move objtool_file struct off the stack ext4: fix NULL pointer dereference while journal is aborted ext4: fix data corruption caused by unaligned direct AIO ext4: brelse all indirect buffer in ext4_ind_remove_space() media: v4l2-ctrls.c/uvc: zero v4l2_event Bluetooth: Fix decrementing reference count twice in releasing socket locking/lockdep: Add debug_locks check in __lock_downgrade() ALSA: hda - Record the current power state before suspend/resume calls ALSA: hda - Enforces runtime_resume after S3 and S4 for each codec tcp/dccp: drop SYN packets if accept queue is full serial: sprd: adjust TIMEOUT to a big value Hang/soft lockup in d_invalidate with simultaneous calls arm64: traps: disable irq in die() serial: sprd: clear timeout interrupt only rather than all interrupts lib/int_sqrt: optimize small argument USB: core: only clean up what we allocated scsi: ufs: fix wrong command type of UTRD for UFSHCI v2.1 rtc: Fix overflow when converting time64_t to rtc_time pwm-backlight: Enable/disable the PWM before/after LCD enable toggle. power: supply: charger-manager: Fix incorrect return value ath10k: avoid possible string overflow Linux 4.9.166 Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
130 lines
3.2 KiB
C
130 lines
3.2 KiB
C
/*
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* Copyright (C) 2007 Lemote Inc.
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* Author: Fuxin Zhang, zhangfx@lemote.com
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*/
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#include <linux/interrupt.h>
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#include <linux/module.h>
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#include <asm/irq_cpu.h>
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#include <asm/i8259.h>
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#include <asm/mipsregs.h>
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#include <loongson.h>
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#include <machine.h>
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#define LOONGSON_TIMER_IRQ (MIPS_CPU_IRQ_BASE + 7) /* cpu timer */
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#define LOONGSON_NORTH_BRIDGE_IRQ (MIPS_CPU_IRQ_BASE + 6) /* bonito */
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#define LOONGSON_UART_IRQ (MIPS_CPU_IRQ_BASE + 3) /* cpu serial port */
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#define LOONGSON_SOUTH_BRIDGE_IRQ (MIPS_CPU_IRQ_BASE + 2) /* i8259 */
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#define LOONGSON_INT_BIT_INT0 (1 << 11)
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#define LOONGSON_INT_BIT_INT1 (1 << 12)
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/*
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* The generic i8259_irq() make the kernel hang on booting. Since we cannot
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* get the irq via the IRR directly, we access the ISR instead.
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*/
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int mach_i8259_irq(void)
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{
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int irq, isr;
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irq = -1;
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if ((LOONGSON_INTISR & LOONGSON_INTEN) & LOONGSON_INT_BIT_INT0) {
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raw_spin_lock(&i8259A_lock);
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isr = inb(PIC_MASTER_CMD) &
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~inb(PIC_MASTER_IMR) & ~(1 << PIC_CASCADE_IR);
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if (!isr)
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isr = (inb(PIC_SLAVE_CMD) & ~inb(PIC_SLAVE_IMR)) << 8;
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irq = ffs(isr) - 1;
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if (unlikely(irq == 7)) {
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/*
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* This may be a spurious interrupt.
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*
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* Read the interrupt status register (ISR). If the most
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* significant bit is not set then there is no valid
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* interrupt.
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*/
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outb(0x0B, PIC_MASTER_ISR); /* ISR register */
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if (~inb(PIC_MASTER_ISR) & 0x80)
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irq = -1;
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}
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raw_spin_unlock(&i8259A_lock);
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}
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return irq;
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}
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EXPORT_SYMBOL(mach_i8259_irq);
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static void i8259_irqdispatch(void)
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{
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int irq;
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irq = mach_i8259_irq();
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if (irq >= 0)
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do_IRQ(irq);
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else
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spurious_interrupt();
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}
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void mach_irq_dispatch(unsigned int pending)
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{
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if (pending & CAUSEF_IP7)
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do_IRQ(LOONGSON_TIMER_IRQ);
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else if (pending & CAUSEF_IP6) { /* North Bridge, Perf counter */
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do_perfcnt_IRQ();
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bonito_irqdispatch();
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} else if (pending & CAUSEF_IP3) /* CPU UART */
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do_IRQ(LOONGSON_UART_IRQ);
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else if (pending & CAUSEF_IP2) /* South Bridge */
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i8259_irqdispatch();
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else
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spurious_interrupt();
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}
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static irqreturn_t ip6_action(int cpl, void *dev_id)
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{
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return IRQ_HANDLED;
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}
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static struct irqaction ip6_irqaction = {
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.handler = ip6_action,
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.name = "cascade",
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.flags = IRQF_SHARED | IRQF_NO_THREAD,
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};
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static struct irqaction cascade_irqaction = {
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.handler = no_action,
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.name = "cascade",
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.flags = IRQF_NO_THREAD | IRQF_NO_SUSPEND,
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};
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void __init mach_init_irq(void)
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{
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/* init all controller
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* 0-15 ------> i8259 interrupt
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* 16-23 ------> mips cpu interrupt
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* 32-63 ------> bonito irq
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*/
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/* setup cs5536 as high level trigger */
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LOONGSON_INTPOL = LOONGSON_INT_BIT_INT0 | LOONGSON_INT_BIT_INT1;
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LOONGSON_INTEDGE &= ~(LOONGSON_INT_BIT_INT0 | LOONGSON_INT_BIT_INT1);
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/* Sets the first-level interrupt dispatcher. */
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mips_cpu_irq_init();
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init_i8259_irqs();
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bonito_irq_init();
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/* setup north bridge irq (bonito) */
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setup_irq(LOONGSON_NORTH_BRIDGE_IRQ, &ip6_irqaction);
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/* setup source bridge irq (i8259) */
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setup_irq(LOONGSON_SOUTH_BRIDGE_IRQ, &cascade_irqaction);
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}
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