diff options
Diffstat (limited to 'ANDROID_3.4.5/arch/arm/mach-footbridge/isa-irq.c')
| -rw-r--r-- | ANDROID_3.4.5/arch/arm/mach-footbridge/isa-irq.c | 183 |
1 files changed, 0 insertions, 183 deletions
diff --git a/ANDROID_3.4.5/arch/arm/mach-footbridge/isa-irq.c b/ANDROID_3.4.5/arch/arm/mach-footbridge/isa-irq.c deleted file mode 100644 index c3a0abbc..00000000 --- a/ANDROID_3.4.5/arch/arm/mach-footbridge/isa-irq.c +++ /dev/null @@ -1,183 +0,0 @@ -/* - * linux/arch/arm/mach-footbridge/irq.c - * - * Copyright (C) 1996-2000 Russell King - * - * 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. - * - * Changelog: - * 22-Aug-1998 RMK Restructured IRQ routines - * 03-Sep-1998 PJB Merged CATS support - * 20-Jan-1998 RMK Started merge of EBSA286, CATS and NetWinder - * 26-Jan-1999 PJB Don't use IACK on CATS - * 16-Mar-1999 RMK Added autodetect of ISA PICs - */ -#include <linux/ioport.h> -#include <linux/interrupt.h> -#include <linux/list.h> -#include <linux/init.h> -#include <linux/io.h> -#include <linux/spinlock.h> - -#include <asm/mach/irq.h> - -#include <mach/hardware.h> -#include <asm/hardware/dec21285.h> -#include <asm/irq.h> -#include <asm/mach-types.h> - -#include "common.h" - -static void isa_mask_pic_lo_irq(struct irq_data *d) -{ - unsigned int mask = 1 << (d->irq & 7); - - outb(inb(PIC_MASK_LO) | mask, PIC_MASK_LO); -} - -static void isa_ack_pic_lo_irq(struct irq_data *d) -{ - unsigned int mask = 1 << (d->irq & 7); - - outb(inb(PIC_MASK_LO) | mask, PIC_MASK_LO); - outb(0x20, PIC_LO); -} - -static void isa_unmask_pic_lo_irq(struct irq_data *d) -{ - unsigned int mask = 1 << (d->irq & 7); - - outb(inb(PIC_MASK_LO) & ~mask, PIC_MASK_LO); -} - -static struct irq_chip isa_lo_chip = { - .irq_ack = isa_ack_pic_lo_irq, - .irq_mask = isa_mask_pic_lo_irq, - .irq_unmask = isa_unmask_pic_lo_irq, -}; - -static void isa_mask_pic_hi_irq(struct irq_data *d) -{ - unsigned int mask = 1 << (d->irq & 7); - - outb(inb(PIC_MASK_HI) | mask, PIC_MASK_HI); -} - -static void isa_ack_pic_hi_irq(struct irq_data *d) -{ - unsigned int mask = 1 << (d->irq & 7); - - outb(inb(PIC_MASK_HI) | mask, PIC_MASK_HI); - outb(0x62, PIC_LO); - outb(0x20, PIC_HI); -} - -static void isa_unmask_pic_hi_irq(struct irq_data *d) -{ - unsigned int mask = 1 << (d->irq & 7); - - outb(inb(PIC_MASK_HI) & ~mask, PIC_MASK_HI); -} - -static struct irq_chip isa_hi_chip = { - .irq_ack = isa_ack_pic_hi_irq, - .irq_mask = isa_mask_pic_hi_irq, - .irq_unmask = isa_unmask_pic_hi_irq, -}; - -static void -isa_irq_handler(unsigned int irq, struct irq_desc *desc) -{ - unsigned int isa_irq = *(unsigned char *)PCIIACK_BASE; - - if (isa_irq < _ISA_IRQ(0) || isa_irq >= _ISA_IRQ(16)) { - do_bad_IRQ(isa_irq, desc); - return; - } - - generic_handle_irq(isa_irq); -} - -static struct irqaction irq_cascade = { - .handler = no_action, - .name = "cascade", -}; - -static struct resource pic1_resource = { - .name = "pic1", - .start = 0x20, - .end = 0x3f, -}; - -static struct resource pic2_resource = { - .name = "pic2", - .start = 0xa0, - .end = 0xbf, -}; - -void __init isa_init_irq(unsigned int host_irq) -{ - unsigned int irq; - - /* - * Setup, and then probe for an ISA PIC - * If the PIC is not there, then we - * ignore the PIC. - */ - outb(0x11, PIC_LO); - outb(_ISA_IRQ(0), PIC_MASK_LO); /* IRQ number */ - outb(0x04, PIC_MASK_LO); /* Slave on Ch2 */ - outb(0x01, PIC_MASK_LO); /* x86 */ - outb(0xf5, PIC_MASK_LO); /* pattern: 11110101 */ - - outb(0x11, PIC_HI); - outb(_ISA_IRQ(8), PIC_MASK_HI); /* IRQ number */ - outb(0x02, PIC_MASK_HI); /* Slave on Ch1 */ - outb(0x01, PIC_MASK_HI); /* x86 */ - outb(0xfa, PIC_MASK_HI); /* pattern: 11111010 */ - - outb(0x0b, PIC_LO); - outb(0x0b, PIC_HI); - - if (inb(PIC_MASK_LO) == 0xf5 && inb(PIC_MASK_HI) == 0xfa) { - outb(0xff, PIC_MASK_LO);/* mask all IRQs */ - outb(0xff, PIC_MASK_HI);/* mask all IRQs */ - } else { - printk(KERN_INFO "IRQ: ISA PIC not found\n"); - host_irq = (unsigned int)-1; - } - - if (host_irq != (unsigned int)-1) { - for (irq = _ISA_IRQ(0); irq < _ISA_IRQ(8); irq++) { - irq_set_chip_and_handler(irq, &isa_lo_chip, - handle_level_irq); - set_irq_flags(irq, IRQF_VALID | IRQF_PROBE); - } - - for (irq = _ISA_IRQ(8); irq < _ISA_IRQ(16); irq++) { - irq_set_chip_and_handler(irq, &isa_hi_chip, - handle_level_irq); - set_irq_flags(irq, IRQF_VALID | IRQF_PROBE); - } - - request_resource(&ioport_resource, &pic1_resource); - request_resource(&ioport_resource, &pic2_resource); - setup_irq(IRQ_ISA_CASCADE, &irq_cascade); - - irq_set_chained_handler(host_irq, isa_irq_handler); - - /* - * On the NetWinder, don't automatically - * enable ISA IRQ11 when it is requested. - * There appears to be a missing pull-up - * resistor on this line. - */ - if (machine_is_netwinder()) - set_irq_flags(_ISA_IRQ(11), IRQF_VALID | - IRQF_PROBE | IRQF_NOAUTOEN); - } -} - - |