/*-
 * Copyright (c) 1997, 1998, 1999 Nicolas Souchu
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``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 OR CONTRIBUTORS 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.
 *
 * $FreeBSD: src/sys/dev/ppbus/ppb_base.c,v 1.10.2.1 2000/08/01 23:26:26 n_hibma Exp $
 */

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/module.h>
#include <sys/bus.h>

#include <machine/clock.h>

#include "ppbconf.h"
  
#include "ppbus_if.h"

#include "ppbio.h"
  
#define DEVTOSOFTC(dev) ((struct ppb_data *)device_get_softc(dev))
 
/*
 * ppb_poll_bus()
 *
 * Polls the bus
 *
 * max is a delay in 10-milliseconds
 */
int
ppb_poll_bus(device_t bus, int max,
             char mask, char status, int how)
{
        int i, j, error;
        char r;

        /* try at least up to 10ms */
        for (j = 0; j < ((how & PPB_POLL) ? max : 1); j++) {
                for (i = 0; i < 10000; i++) {
                        r = ppb_rstr(bus);
                        DELAY(1);
                        if ((r & mask) == status)
                                return (0);
                }
        }

        if (!(how & PPB_POLL)) {
           for (i = 0; max == PPB_FOREVER || i < max-1; i++) {
                if ((ppb_rstr(bus) & mask) == status)
                        return (0);

                switch (how) {
                case PPB_NOINTR:
                        /* wait 10 ms */
                        tsleep((caddr_t)bus, 0, "ppbpoll", hz/100);
                        break;

                case PPB_INTR:
                default:
                        /* wait 10 ms */
                        if (((error = tsleep((caddr_t)bus, PCATCH,
                            "ppbpoll", hz/100)) != EWOULDBLOCK) != 0) {
                                return (error);
                        }
                        break;
                }
           }
        }

        return (EWOULDBLOCK);
}

/*
 * ppb_get_epp_protocol()
 *
 * Return the chipset EPP protocol
 */
int
ppb_get_epp_protocol(device_t bus)
{
        uintptr_t protocol;

        BUS_READ_IVAR(device_get_parent(bus), bus, PPC_IVAR_EPP_PROTO, &protocol);

        return (protocol);
}

/*
 * ppb_get_mode()
 *
 */
int
ppb_get_mode(device_t bus)
{
        struct ppb_data *ppb = DEVTOSOFTC(bus);

        /* XXX yet device mode = ppbus mode = chipset mode */
        return (ppb->mode);
}

/*
 * ppb_set_mode()
 *
 * Set the operating mode of the chipset, return the previous mode
 */
int
ppb_set_mode(device_t bus, int mode)
{
        struct ppb_data *ppb = DEVTOSOFTC(bus);
        int old_mode = ppb_get_mode(bus);

        if (PPBUS_SETMODE(device_get_parent(bus), mode))
                return -1;

        /* XXX yet device mode = ppbus mode = chipset mode */
        ppb->mode = (mode & PPB_MASK);

        return (old_mode);
}

/*
 * ppb_write()
 *
 * Write charaters to the port
 */
int
ppb_write(device_t bus, char *buf, int len, int how)
{
        return (PPBUS_WRITE(device_get_parent(bus), buf, len, how));
}

/*
 * ppb_reset_epp_timeout()
 *
 * Reset the EPP timeout bit in the status register
 */
int
ppb_reset_epp_timeout(device_t bus)
{
        return(PPBUS_RESET_EPP(device_get_parent(bus)));
}

/*
 * ppb_ecp_sync()
 *
 * Wait for the ECP FIFO to be empty
 */
int
ppb_ecp_sync(device_t bus)
{
        return (PPBUS_ECP_SYNC(device_get_parent(bus)));
}

/*
 * ppb_get_status()
 *
 * Read the status register and update the status info
 */
int
ppb_get_status(device_t bus, struct ppb_status *status)
{
        char r;

        r = status->status = ppb_rstr(bus);

        status->timeout = r & TIMEOUT;
        status->error   = !(r & nFAULT);
        status->select  = r & SELECT;
        status->paper_end = r & PERROR;
        status->ack     = !(r & nACK);
        status->busy    = !(r & nBUSY);

        return (0);
}