ide.h

一个2.4.21版本的嵌入式linux内核

/*
 * linux/include/asm-arm/arch-cl7500/ide.h
 *
 * Copyright (c) 1997 Russell King
 *
 * Modifications:
 *  29-07-1998	RMK	Major re-work of IDE architecture specific code
 */
#include <asm/irq.h>
#include <asm/arch/hardware.h>

/*
 * Set up a hw structure for a specified data port, control port and IRQ.
 * This should follow whatever the default interface uses.
 */
static __inline__ void
ide_init_hwif_ports(hw_regs_t *hw, int data_port, int ctrl_port, int *irq)
{
	ide_ioreg_t reg = data_port;
	int i;

	memset(hw, 0, sizeof(*hw));

	for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++) {
		hw->io_ports[i] = reg;
		reg += 1;
	}
	if (ctrl_port) {
		hw->io_ports[IDE_CONTROL_OFFSET] = ctrl_port;
	} else {
		hw->io_ports[IDE_CONTROL_OFFSET] = data_port + 0x206;
	}
	if (irq != NULL)
		*irq = 0;
	hw->io_ports[IDE_IRQ_OFFSET] = 0;
}

/*
 * This registers the standard ports for this architecture with the IDE
 * driver.
 */
static __inline__ void
ide_init_default_hwifs(void)
{
	hw_regs_t hw;
   
	ide_init_hwif_ports(&hw, ISASLOT_IO + 0x1f0, ISASLOT_IO + 0x3f6, NULL);
   	hw.irq = IRQ_ISA_14;
	ide_register_hw(&hw, NULL);
}