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

/*
 *  Copyright (C) 2000-2002	   Michael Cornwell <cornwell@acm.org>
 *  Copyright (C) 2000-2002	   Andre Hedrick <andre@linux-ide.org>
 *  Copyright (C) 2001-2002	   Klaus Smolin
 *					IBM Storage Technology Division
 *  Copyright (C) 2003-2004, 2007  Bartlomiej Zolnierkiewicz
 *
 *  The big the bad and the ugly.
 */

#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/sched.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/scatterlist.h>

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

void ide_tf_load(ide_drive_t *drive, ide_task_t *task)
{
	ide_hwif_t *hwif = drive->hwif;
	struct ide_io_ports *io_ports = &hwif->io_ports;
	struct ide_taskfile *tf = &task->tf;
	u8 HIHI = (task->tf_flags & IDE_TFLAG_LBA48) ? 0xE0 : 0xEF;

	if (task->tf_flags & IDE_TFLAG_FLAGGED)
		HIHI = 0xFF;

#ifdef DEBUG
	printk("%s: tf: feat 0x%02x nsect 0x%02x lbal 0x%02x "
		"lbam 0x%02x lbah 0x%02x dev 0x%02x cmd 0x%02x\n",
		drive->name, tf->feature, tf->nsect, tf->lbal,
		tf->lbam, tf->lbah, tf->device, tf->command);
	printk("%s: hob: nsect 0x%02x lbal 0x%02x "
		"lbam 0x%02x lbah 0x%02x\n",
		drive->name, tf->hob_nsect, tf->hob_lbal,
		tf->hob_lbam, tf->hob_lbah);
#endif

	ide_set_irq(drive, 1);

	if ((task->tf_flags & IDE_TFLAG_NO_SELECT_MASK) == 0)
		SELECT_MASK(drive, 0);

	if (task->tf_flags & IDE_TFLAG_OUT_DATA)
		hwif->OUTW((tf->hob_data << 8) | tf->data, io_ports->data_addr);

	if (task->tf_flags & IDE_TFLAG_OUT_HOB_FEATURE)
		hwif->OUTB(tf->hob_feature, io_ports->feature_addr);
	if (task->tf_flags & IDE_TFLAG_OUT_HOB_NSECT)
		hwif->OUTB(tf->hob_nsect, io_ports->nsect_addr);
	if (task->tf_flags & IDE_TFLAG_OUT_HOB_LBAL)
		hwif->OUTB(tf->hob_lbal, io_ports->lbal_addr);
	if (task->tf_flags & IDE_TFLAG_OUT_HOB_LBAM)
		hwif->OUTB(tf->hob_lbam, io_ports->lbam_addr);
	if (task->tf_flags & IDE_TFLAG_OUT_HOB_LBAH)
		hwif->OUTB(tf->hob_lbah, io_ports->lbah_addr);

	if (task->tf_flags & IDE_TFLAG_OUT_FEATURE)
		hwif->OUTB(tf->feature, io_ports->feature_addr);
	if (task->tf_flags & IDE_TFLAG_OUT_NSECT)
		hwif->OUTB(tf->nsect, io_ports->nsect_addr);
	if (task->tf_flags & IDE_TFLAG_OUT_LBAL)
		hwif->OUTB(tf->lbal, io_ports->lbal_addr);
	if (task->tf_flags & IDE_TFLAG_OUT_LBAM)
		hwif->OUTB(tf->lbam, io_ports->lbam_addr);
	if (task->tf_flags & IDE_TFLAG_OUT_LBAH)
		hwif->OUTB(tf->lbah, io_ports->lbah_addr);

	if (task->tf_flags & IDE_TFLAG_OUT_DEVICE)
		hwif->OUTB((tf->device & HIHI) | drive->select.all,
			   io_ports->device_addr);
}

int taskfile_lib_get_identify (ide_drive_t *drive, u8 *buf)
{
	ide_task_t args;

	memset(&args, 0, sizeof(ide_task_t));
	args.tf.nsect = 0x01;
	if (drive->media == ide_disk)
		args.tf.command = WIN_IDENTIFY;
	else
		args.tf.command = WIN_PIDENTIFY;
	args.tf_flags	= IDE_TFLAG_TF | IDE_TFLAG_DEVICE;
	args.data_phase	= TASKFILE_IN;
	return ide_raw_taskfile(drive, &args, buf, 1);
}

static int inline task_dma_ok(ide_task_t *task)
{
	if (blk_fs_request(task->rq) || (task->tf_flags & IDE_TFLAG_FLAGGED))
		return 1;

	switch (task->tf.command) {
		case WIN_WRITEDMA_ONCE:
		case WIN_WRITEDMA:
		case WIN_WRITEDMA_EXT:
		case WIN_READDMA_ONCE:
		case WIN_READDMA:
		case WIN_READDMA_EXT:
		case WIN_IDENTIFY_DMA:
			return 1;
	}

	return 0;
}

static ide_startstop_t task_no_data_intr(ide_drive_t *);
static ide_startstop_t set_geometry_intr(ide_drive_t *);
static ide_startstop_t recal_intr(ide_drive_t *);
static ide_startstop_t set_multmode_intr(ide_drive_t *);
static ide_startstop_t pre_task_out_intr(ide_drive_t *, struct request *);
static ide_startstop_t task_in_intr(ide_drive_t *);

ide_startstop_t do_rw_taskfile (ide_drive_t *drive, ide_task_t *task)
{
	ide_hwif_t *hwif	= HWIF(drive);
	struct ide_taskfile *tf = &task->tf;
	ide_handler_t *handler = NULL;
	const struct ide_dma_ops *dma_ops<