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#include <linux/types.h>

#include <linux/mm.h>

#include <linux/blk.h>

#include <linux/sched.h>

#include <linux/version.h>

#include <asm/page.h>

#include <asm/pgtable.h>

#include <asm/mvme147hw.h>

#include <asm/irq.h>

#include "scsi.h"

#include "hosts.h"

#include "wd33c93.h"

#include "mvme147.h"

#include<linux/stat.h>

#define HDATA(ptr) ((struct WD33C93_hostdata *)((ptr)->hostdata))

static struct Scsi_Host *mvme147_host = NULL;

static void mvme147_intr (int irq, void *dummy, struct pt_regs *fp)

{

    if (irq == MVME147_IRQ_SCSI_PORT)

        wd33c93_intr (mvme147_host);

    else

        m147_pcc->dma_intr = 0x89;      /* Ack and enable ints */

}

static int dma_setup (Scsi_Cmnd *cmd, int dir_in)

{

    unsigned char flags = 0x01;

    unsigned long addr = virt_to_bus(cmd->SCp.ptr);

    /* setup dma direction */

    if (!dir_in)

        flags |= 0x04;

    /* remember direction */

    HDATA(mvme147_host)->dma_dir = dir_in;

    if (dir_in)

        /* invalidate any cache */

        cache_clear (addr, cmd->SCp.this_residual);

    else

        /* push any dirty cache */

        cache_push (addr, cmd->SCp.this_residual);

    /* start DMA */

    m147_pcc->dma_bcr   = cmd->SCp.this_residual | (1<<24);

    m147_pcc->dma_dadr  = addr;

    m147_pcc->dma_cntrl = flags;

    /* return success */

    return 0;

}

static void dma_stop (struct Scsi_Host *instance, Scsi_Cmnd *SCpnt,

                      int status)

{

    m147_pcc->dma_cntrl = 0;

}

int mvme147_detect(Scsi_Host_Template *tpnt)

{

    static unsigned char called = 0;

    wd33c93_regs regs;

    if (!MACH_IS_MVME147 || called)

        return 0;

    called++;

    tpnt->proc_name = "MVME147";

    tpnt->proc_info = &wd33c93_proc_info;

    mvme147_host = scsi_register (tpnt, sizeof(struct WD33C93_hostdata));

    if (!mvme147_host)

            goto err_out;

    mvme147_host->base = 0xfffe4000;

    mvme147_host->irq = MVME147_IRQ_SCSI_PORT;

    regs.SASR = (volatile unsigned char *)0xfffe4000;

    regs.SCMD = (volatile unsigned char *)0xfffe4001;

    wd33c93_init(mvme147_host, regs, dma_setup, dma_stop, WD33C93_FS_8_10);

    if (request_irq(MVME147_IRQ_SCSI_PORT, mvme147_intr, 0, "MVME147 SCSI PORT", mvme147_intr))

            goto err_unregister;

    if (request_irq(MVME147_IRQ_SCSI_DMA, mvme147_intr, 0, "MVME147 SCSI DMA", mvme147_intr))

            goto err_free_irq;

#if 0   /* Disabled; causes problems booting */

    m147_pcc->scsi_interrupt = 0x10;    /* Assert SCSI bus reset */

    udelay(100);

    m147_pcc->scsi_interrupt = 0x00;    /* Negate SCSI bus reset */

    udelay(2000);

    m147_pcc->scsi_interrupt = 0x40;    /* Clear bus reset interrupt */

#endif

    m147_pcc->scsi_interrupt = 0x09;    /* Enable interrupt */

    m147_pcc->dma_cntrl = 0x00;         /* ensure DMA is stopped */

    m147_pcc->dma_intr = 0x89;          /* Ack and enable ints */

    return 1;

 err_free_irq:

    free_irq(MVME147_IRQ_SCSI_PORT, mvme147_intr);

 err_unregister:

    wd33c93_release();

    scsi_unregister(mvme147_host);

 err_out:

    return 0;

}

#define HOSTS_C

#include "mvme147.h"

static Scsi_Host_Template driver_template = MVME147_SCSI;

#include "scsi_module.c"

int mvme147_release(struct Scsi_Host *instance)

{

#ifdef MODULE

    /* XXX Make sure DMA is stopped! */

    wd33c93_release();

    free_irq(MVME147_IRQ_SCSI_PORT, mvme147_intr);

    free_irq(MVME147_IRQ_SCSI_DMA, mvme147_intr);

#endif

    return 1;

}