98 lines
2.1 KiB
C
98 lines
2.1 KiB
C
/*
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* arch/sh/boards/landisk/irq.c
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*
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* Copyright (C) 2001 Ian da Silva, Jeremy Siegel
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* Based largely on io_se.c.
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*
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* I/O routine for I-O Data Device, Inc. LANDISK.
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*
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* Initial version only to support LAN access; some
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* placeholder code from io_landisk.c left in with the
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* expectation of later SuperIO and PCMCIA access.
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*/
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/*
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* modified by kogiidena
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* 2005.03.03
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*/
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#include <linux/init.h>
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#include <linux/irq.h>
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#include <linux/interrupt.h>
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#include <linux/io.h>
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#include <asm/landisk/iodata_landisk.h>
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static void enable_landisk_irq(unsigned int irq);
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static void disable_landisk_irq(unsigned int irq);
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/* shutdown is same as "disable" */
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#define shutdown_landisk_irq disable_landisk_irq
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static void ack_landisk_irq(unsigned int irq);
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static void end_landisk_irq(unsigned int irq);
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static unsigned int startup_landisk_irq(unsigned int irq)
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{
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enable_landisk_irq(irq);
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return 0; /* never anything pending */
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}
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static void disable_landisk_irq(unsigned int irq)
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{
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unsigned char val;
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unsigned char mask = 0xff ^ (0x01 << (irq - 5));
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/* Set the priority in IPR to 0 */
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val = ctrl_inb(PA_IMASK);
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val &= mask;
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ctrl_outb(val, PA_IMASK);
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}
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static void enable_landisk_irq(unsigned int irq)
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{
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unsigned char val;
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unsigned char value = (0x01 << (irq - 5));
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/* Set priority in IPR back to original value */
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val = ctrl_inb(PA_IMASK);
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val |= value;
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ctrl_outb(val, PA_IMASK);
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}
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static void ack_landisk_irq(unsigned int irq)
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{
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disable_landisk_irq(irq);
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}
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static void end_landisk_irq(unsigned int irq)
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{
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if (!(irq_desc[irq].status & (IRQ_DISABLED | IRQ_INPROGRESS)))
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enable_landisk_irq(irq);
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}
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static struct hw_interrupt_type landisk_irq_type = {
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.typename = "LANDISK IRQ",
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.startup = startup_landisk_irq,
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.shutdown = shutdown_landisk_irq,
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.enable = enable_landisk_irq,
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.disable = disable_landisk_irq,
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.ack = ack_landisk_irq,
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.end = end_landisk_irq
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};
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static void make_landisk_irq(unsigned int irq)
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{
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disable_irq_nosync(irq);
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irq_desc[irq].chip = &landisk_irq_type;
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disable_landisk_irq(irq);
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}
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/*
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* Initialize IRQ setting
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*/
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void __init init_landisk_IRQ(void)
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{
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int i;
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for (i = 5; i < 14; i++)
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make_landisk_irq(i);
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}
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