/*-
 * Copyright (c) 1999 Michael Smith
 * 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/mlx/mlx_pci.c,v 1.4.2.5 2001/06/25 04:37:51 msmith Exp $
 */

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/bus.h>
#include <sys/conf.h>
#include <sys/devicestat.h>
#include <sys/disk.h>
#include <sys/rman.h>

#include <bus/pci/pcireg.h>
#include <bus/pci/pcivar.h>

#include "mlx_compat.h"
#include "mlxio.h"
#include "mlxvar.h"
#include "mlxreg.h"

static int                      mlx_pci_probe(device_t dev);
static int                      mlx_pci_attach(device_t dev);

static device_method_t mlx_methods[] = {
    /* Device interface */
    DEVMETHOD(device_probe,     mlx_pci_probe),
    DEVMETHOD(device_attach,    mlx_pci_attach),
    DEVMETHOD(device_detach,    mlx_detach),
    DEVMETHOD(device_shutdown,  mlx_shutdown),
    DEVMETHOD(device_suspend,   mlx_suspend),
    DEVMETHOD(device_resume,    mlx_resume),

    DEVMETHOD(bus_print_child,  bus_generic_print_child),
    DEVMETHOD(bus_driver_added, bus_generic_driver_added),
    DEVMETHOD_END
};

static driver_t mlx_pci_driver = {
        "mlx",
        mlx_methods,
        sizeof(struct mlx_softc)
};

DRIVER_MODULE(mlx, pci, mlx_pci_driver, mlx_devclass, NULL, NULL);

struct mlx_ident
{
    u_int16_t   vendor;
    u_int16_t   device;
    u_int16_t   subvendor;
    u_int16_t   subdevice;
    int         iftype;
    char        *desc;
} mlx_identifiers[] = {
    {0x1069, 0x0001, 0x0000, 0x0000, MLX_IFTYPE_2, "Mylex version 2 RAID interface"},
    {0x1069, 0x0002, 0x0000, 0x0000, MLX_IFTYPE_3, "Mylex version 3 RAID interface"},
    {0x1069, 0x0010, 0x0000, 0x0000, MLX_IFTYPE_4, "Mylex version 4 RAID interface"},
    {0x1011, 0x1065, 0x1069, 0x0020, MLX_IFTYPE_5, "Mylex version 5 RAID interface"},
    {0, 0, 0, 0, 0, 0}
};

static int
mlx_pci_probe(device_t dev)
{
    struct mlx_ident    *m;

    debug_called(1);

    for (m = mlx_identifiers; m->vendor != 0; m++) {
        if ((m->vendor == pci_get_vendor(dev)) &&
            (m->device == pci_get_device(dev)) &&
            ((m->subvendor == 0) || ((m->subvendor == pci_get_subvendor(dev)) &&
                                     (m->subdevice == pci_get_subdevice(dev))))) {
            
            device_set_desc(dev, m->desc);
            return(-10);        /* allow room to be overridden */
        }
    }
    return(ENXIO);
}

static int
mlx_pci_attach(device_t dev)
{
    struct mlx_softc    *sc;
    int                 i, error;
    u_int32_t           command;

    debug_called(1);

    /*
     * Make sure we are going to be able to talk to this board.
     */
    command = pci_read_config(dev, PCIR_COMMAND, 2);
    if ((command & PCIM_CMD_MEMEN) == 0) {
        device_printf(dev, "memory window not available\n");
        return(ENXIO);
    }
    /* force the busmaster enable bit on */
    command |= PCIM_CMD_BUSMASTEREN;
    pci_write_config(dev, PCIR_COMMAND, command, 2);

    /*
     * Initialise softc.
     */
    sc = device_get_softc(dev);
    bzero(sc, sizeof(*sc));
    sc->mlx_dev = dev;

    /*
     * Work out what sort of adapter this is (we need to know this in order
     * to map the appropriate interface resources).
     */
    sc->mlx_iftype = 0;
    for (i = 0; mlx_identifiers[i].vendor != 0; i++) {
        if ((mlx_identifiers[i].vendor == pci_get_vendor(dev)) &&
            (mlx_identifiers[i].device == pci_get_device(dev))) {
            sc->mlx_iftype = mlx_identifiers[i].iftype;
            break;
        }
    }
    if (sc->mlx_iftype == 0)            /* shouldn't happen */
        return(ENXIO);
    
    /*
     * Allocate the PCI register window.
     */
    
    /* type 2/3 adapters have an I/O region we don't prefer at base 0 */
    switch(sc->mlx_iftype) {
    case MLX_IFTYPE_2:
    case MLX_IFTYPE_3:
        sc->mlx_mem_type = SYS_RES_MEMORY;
        sc->mlx_mem_rid = MLX_CFG_BASE1;
        sc->mlx_mem = bus_alloc_resource(dev, sc->mlx_mem_type, &sc->mlx_mem_rid, 0, ~0, 1, RF_ACTIVE);
        if (sc->mlx_mem == NULL) {
            sc->mlx_mem_type = SYS_RES_IOPORT;
            sc->mlx_mem_rid = MLX_CFG_BASE0;
            sc->mlx_mem = bus_alloc_resource(dev, sc->mlx_mem_type, &sc->mlx_mem_rid, 0, ~0, 1, RF_ACTIVE);
        }
        break;
    case MLX_IFTYPE_4:
    case MLX_IFTYPE_5:
        sc->mlx_mem_type = SYS_RES_MEMORY;
        sc->mlx_mem_rid = MLX_CFG_BASE0;
        sc->mlx_mem = bus_alloc_resource(dev, sc->mlx_mem_type, &sc->mlx_mem_rid, 0, ~0, 1, RF_ACTIVE);
        break;
    }
    if (sc->mlx_mem == NULL) {
        device_printf(sc->mlx_dev, "couldn't allocate mailbox window\n");
        mlx_free(sc);
        return(ENXIO);
    }
    sc->mlx_btag = rman_get_bustag(sc->mlx_mem);
    sc->mlx_bhandle = rman_get_bushandle(sc->mlx_mem);

    /*
     * Allocate the parent bus DMA tag appropriate for PCI.
     */
    error = bus_dma_tag_create(NULL,                    /* parent */
                               1, 0,                    /* alignment, boundary */
                               BUS_SPACE_MAXADDR_32BIT, /* lowaddr */
                               BUS_SPACE_MAXADDR,       /* highaddr */
                               MAXBSIZE, MLX_NSEG,      /* maxsize, nsegments */
                               BUS_SPACE_MAXSIZE_32BIT, /* maxsegsize */
                               BUS_DMA_ALLOCNOW,        /* flags */
                               &sc->mlx_parent_dmat);
    if (error != 0) {
        device_printf(dev, "can't allocate parent DMA tag\n");
        mlx_free(sc);
        return(ENOMEM);
    }

    /*
     * Do bus-independant initialisation.
     */
    error = mlx_attach(sc);
    if (error != 0) {
        mlx_free(sc);
        return(error);
    }
    
    /*
     * Start the controller.
     */
    mlx_startup(sc);
    return(0);
}