path: root/drivers/ide/mips/au1xxx-ide.c

/*
 * linux/drivers/ide/mips/au1xxx-ide.c  version 01.30.00        Aug. 02 2005
 *
 * BRIEF MODULE DESCRIPTION
 * AMD Alchemy Au1xxx IDE interface routines over the Static Bus
 *
 * Copyright (c) 2003-2005 AMD, Personal Connectivity Solutions
 *
 * This program is free software; you can redistribute it and/or modify it under
 * the terms of the GNU General Public License as published by the Free Software
 * Foundation; either version 2 of the License, or (at your option) any later
 * version.
 *
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
 * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR
 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 *
 * You should have received a copy of the GNU General Public License along with
 * this program; if not, write to the Free Software Foundation, Inc.,
 * 675 Mass Ave, Cambridge, MA 02139, USA.
 *
 * Note: for more information, please refer "AMD Alchemy Au1200/Au1550 IDE
 *       Interface and Linux Device Driver" Application Note.
 */
#undef REALLY_SLOW_IO           /* most systems can safely undef this */

#include <linux/config.h>       /* for CONFIG_BLK_DEV_IDEPCI */
#include <linux/types.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/delay.h>
#include <linux/timer.h>
#include <linux/mm.h>
#include <linux/ioport.h>
#include <linux/hdreg.h>
#include <linux/init.h>
#include <linux/ide.h>
#include <linux/sysdev.h>

#include <linux/dma-mapping.h>

#include <asm/io.h>
#include <asm/mach-au1x00/au1xxx.h>
#include <asm/mach-au1x00/au1xxx_dbdma.h>

#if CONFIG_PM
#include <asm/mach-au1x00/au1xxx_pm.h>
#endif

#include <asm/mach-au1x00/au1xxx_ide.h>

#define DRV_NAME	"au1200-ide"
#define DRV_VERSION	"1.0"
#define DRV_AUTHOR	"AMD PCS / Pete Popov <ppopov@embeddedalley.com>"
#define DRV_DESC	"Au1200 IDE"

static _auide_hwif auide_hwif;
static spinlock_t ide_tune_drive_spin_lock = SPIN_LOCK_UNLOCKED;
static spinlock_t ide_tune_chipset_spin_lock = SPIN_LOCK_UNLOCKED;
static int dbdma_init_done = 0;

/*
 * local I/O functions
 */
u8 auide_inb(unsigned long port)
{
        return (au_readb(port));
}

u16 auide_inw(unsigned long port)
{
        return (au_readw(port));
}

u32 auide_inl(unsigned long port)
{
        return (au_readl(port));
}

void auide_insw(unsigned long port, void *addr, u32 count)
{
#if defined(CONFIG_BLK_DEV_IDE_AU1XXX_PIO_DBDMA)

        _auide_hwif *ahwif = &auide_hwif;
        chan_tab_t *ctp;
        au1x_ddma_desc_t *dp;

        if(!put_dest_flags(ahwif->rx_chan, (void*)addr, count << 1,
				DDMA_FLAGS_NOIE)) {
                printk(KERN_ERR "%s failed %d\n", __FUNCTION__, __LINE__);
                return;
        }
        ctp = *((chan_tab_t **)ahwif->rx_chan);
        dp = ctp->cur_ptr;
        while (dp->dscr_cmd0 & DSCR_CMD0_V)
                ;
        ctp->cur_ptr = au1xxx_ddma_get_nextptr_virt(dp);
#else
        while (count--)
        {
                *(u16 *)addr = au_readw(port);
                addr +=2 ;
        }
#endif
}

void auide_insl(unsigned long port, void *addr, u32 count)
{
        while (count--)
        {
                *(u32 *)addr = au_readl(port);
                /* NOTE: For IDE interfaces over PCMCIA,
                 * 32-bit access does not work
                 */<