path: root/drivers/ide/ide-iops.c

/*
 *  Copyright (C) 2000-2002	Andre Hedrick <andre@linux-ide.org>
 *  Copyright (C) 2003		Red Hat <alan@redhat.com>
 *
 */

#include <linux/module.h>
#include <linux/types.h>
#include <linux/string.h>
#include <linux/kernel.h>
#include <linux/timer.h>
#include <linux/mm.h>
#include <linux/interrupt.h>
#include <linux/major.h>
#include <linux/errno.h>
#include <linux/genhd.h>
#include <linux/blkpg.h>
#include <linux/slab.h>
#include <linux/pci.h>
#include <linux/delay.h>
#include <linux/hdreg.h>
#include <linux/ide.h>
#include <linux/bitops.h>
#include <linux/nmi.h>

#include <asm/byteorder.h>
#include <asm/irq.h>
#include <asm/uaccess.h>
#include <asm/io.h>

/*
 *	Conventional PIO operations for ATA devices
 */

static u8 ide_inb (unsigned long port)
{
	return (u8) inb(port);
}

static u16 ide_inw (unsigned long port)
{
	return (u16) inw(port);
}

static void ide_outb (u8 val, unsigned long port)
{
	outb(val, port);
}

static void ide_outbsync (ide_drive_t *drive, u8 addr, unsigned long port)
{
	outb(addr, port);
}

static void ide_outw (u16 val, unsigned long port)
{
	outw(val, port);
}

void default_hwif_iops (ide_hwif_t *hwif)
{
	hwif->OUTB	= ide_outb;
	hwif->OUTBSYNC	= ide_outbsync;
	hwif->OUTW	= ide_outw;
	hwif->INB	= ide_inb;
	hwif->INW	= ide_inw;
}

/*
 *	MMIO operations, typically used for SATA controllers
 */

static u8 ide_mm_inb (unsigned long port)
{
	return (u8) readb((void __iomem *) port);
}

static u16 ide_mm_inw (unsigned long port)
{
	return (u16) readw((void __iomem *) port);
}

static void ide_mm_outb (u8 value, unsigned long port)
{
	writeb(value, (void __iomem *) port);
}

static void ide_mm_outbsync (ide_drive_t *drive, u8 value, unsigned long port)
{
	writeb(value, (void __iomem *) port);
}

static void ide_mm_outw (u16 value, unsigned long port)
{
	writew(value, (void __iomem *) port);
}

void default_hwif_mmiops (ide_hwif_t *hwif)
{
	hwif->OUTB	= ide_mm_outb;
	/* Most systems will need to override OUTBSYNC, alas however
	   this one is controller specific! */
	hwif->OUTBSYNC	= ide_mm_outbsync;
	hwif->OUTW	= ide_mm_outw;
	hwif->INB	= ide_mm_inb;
	hwif->INW	= ide_mm_inw;
}

EXPORT_SYMBOL(default_hwif_mmiops);

void SELECT_DRIVE (ide_drive_t *drive)
{
	ide_hwif_t *hwif = drive->hwif;
	const struct ide_port_ops *port_ops = hwif->port_ops;

	if (port_ops && port_ops->selectproc)
		port_ops->selectproc(drive);

	hwif->OUTB(drive->select.all, hwif->io_ports.device_addr);
}

void SELECT_MASK (ide_drive_t *drive, int mask)
{
	const struct ide_port_ops *port_ops = drive->hwif->port_ops;

	if (port_ops && port_ops->maskproc)
		port_ops->maskproc(drive, mask);
}

/*
 * Some localbus EIDE interfaces require a special access sequence
 * when using 32-bit I/O instructions to transfer data.  We call this
 * the "vlb_sync" sequence, which consists of three successive reads
 * of the sector count register location, with interrupts disabled
 * to ensure that the reads all happen together.
 */
static void ata_vlb_sync(ide_drive_t *drive, unsigned long port)
{
	(void) HWIF(drive)->INB(port);
	(void) HWIF(drive)->