/*-
 * FreeBSD, PCI product support functions
 *
 * Copyright (c) 1995-2001 Justin T. Gibbs
 * 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,
 *    without modification, immediately at the beginning of the file.
 * 2. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * Alternatively, this software may be distributed under the terms of the
 * GNU Public License ("GPL").
 *
 * 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.
 *
 * $Id: //depot/aic7xxx/freebsd/dev/aic7xxx/ahc_pci.c#19 $
 */

#include <dev/aic7xxx/aic7xxx_osm.h>

static int ahc_pci_probe(device_t dev);
static int ahc_pci_attach(device_t dev);

static device_method_t ahc_pci_device_methods[] = {
        /* Device interface */
        DEVMETHOD(device_probe,         ahc_pci_probe),
        DEVMETHOD(device_attach,        ahc_pci_attach),
        DEVMETHOD(device_detach,        ahc_detach),
        DEVMETHOD_END
};

static driver_t ahc_pci_driver = {
        "ahc",
        ahc_pci_device_methods,
        sizeof(struct ahc_softc)
};

DRIVER_MODULE(ahc_pci, pci, ahc_pci_driver, 0, 0);
MODULE_DEPEND(ahc_pci, ahc, 1, 1, 1);
MODULE_VERSION(ahc_pci, 1);

static int
ahc_pci_probe(device_t dev)
{
        struct  ahc_pci_identity *entry;

        entry = ahc_find_pci_device(dev);
        if (entry != NULL) {
                device_set_desc(dev, entry->name);
                return (BUS_PROBE_DEFAULT);
        }
        return (ENXIO);
}

static int
ahc_pci_attach(device_t dev)
{
        struct   ahc_pci_identity *entry;
        struct   ahc_softc *ahc;
        char    *name;
        int      error;

        entry = ahc_find_pci_device(dev);
        if (entry == NULL)
                return (ENXIO);

        /*
         * Allocate a softc for this card and
         * set it up for attachment by our
         * common detect routine.
         */
        name = malloc(strlen(device_get_nameunit(dev)) + 1, M_DEVBUF, M_NOWAIT);
        if (name == NULL)
                return (ENOMEM);
        strcpy(name, device_get_nameunit(dev));
        ahc = ahc_alloc(dev, name);
        if (ahc == NULL)
                return (ENOMEM);

        ahc_set_unit(ahc, device_get_unit(dev));

        /*
         * Should we bother disabling 39Bit addressing
         * based on installed memory?
         */
        if (sizeof(bus_addr_t) > 4)
                ahc->flags |= AHC_39BIT_ADDRESSING;

        /* Allocate a dmatag for our SCB DMA maps */
        error = aic_dma_tag_create(ahc, /*parent*/bus_get_dma_tag(dev),
                                   /*alignment*/1, /*boundary*/0,
                                   (ahc->flags & AHC_39BIT_ADDRESSING)
                                   ? (bus_addr_t)0x7FFFFFFFFFLL
                                   : BUS_SPACE_MAXADDR_32BIT,
                                   /*highaddr*/BUS_SPACE_MAXADDR,
                                   /*filter*/NULL, /*filterarg*/NULL,
                                   /*maxsize*/BUS_SPACE_MAXSIZE_32BIT,
                                   /*nsegments*/AHC_NSEG,
                                   /*maxsegsz*/AHC_MAXTRANSFER_SIZE,
                                   /*flags*/0,
                                   &ahc->parent_dmat);

        if (error != 0) {
                printf("ahc_pci_attach: Could not allocate DMA tag "
                       "- error %d\n", error);
                ahc_free(ahc);
                return (ENOMEM);
        }
        ahc->dev_softc = dev;
        error = ahc_pci_config(ahc, entry);
        if (error != 0) {
                ahc_free(ahc);
                return (error);
        }

        ahc_attach(ahc);
        return (0);
}

int
ahc_pci_map_registers(struct ahc_softc *ahc)
{
        struct  resource *regs;
        int     regs_type;
        int     regs_id;
        int     allow_memio = 1;

        regs = NULL;
        regs_type = 0;
        regs_id = 0;

        /* Retrieve the per-device 'allow_memio' hint */
        if (resource_int_value(device_get_name(ahc->dev_softc),
                               device_get_unit(ahc->dev_softc),
                               "allow_memio", &allow_memio) != 0) {
                if (bootverbose)
                        device_printf(ahc->dev_softc, "Defaulting to MEMIO ");
#if defined(AHC_ALLOW_MEMIO) && (AHC_ALLOW_MEMIO == 0)
                if (bootverbose)
                        printf("off\n");
                allow_memio = 0;
#else
                if (bootverbose)
                        printf("on\n");
                allow_memio = 1;
#endif
        }

        if (allow_memio != 0) {
                regs_type = SYS_RES_MEMORY;
                regs_id = AHC_PCI_MEMADDR;
                regs = bus_alloc_resource_any(ahc->dev_softc, regs_type,
                                              &regs_id, RF_ACTIVE);
                if (regs != NULL) {
                        ahc->tag = rman_get_bustag(regs);
                        ahc->bsh = rman_get_bushandle(regs);

                        /*
                         * Do a quick test to see if memory mapped
                         * I/O is functioning correctly.
                         */
                        if (ahc_pci_test_register_access(ahc) != 0) {
                                device_printf(ahc->dev_softc,
                                       "PCI Device %d:%d:%d failed memory "
                                       "mapped test.  Using PIO.\n",
                                       aic_get_pci_bus(ahc->dev_softc),
                                       aic_get_pci_slot(ahc->dev_softc),
                                       aic_get_pci_function(ahc->dev_softc));
                                bus_release_resource(ahc->dev_softc, regs_type,
                                                     regs_id, regs);
                                regs = NULL;
                        }
                }
        }

        if (regs == NULL) {
                regs_type = SYS_RES_IOPORT;
                regs_id = AHC_PCI_IOADDR;
                regs = bus_alloc_resource_any(ahc->dev_softc, regs_type,
                                              &regs_id, RF_ACTIVE);
                if (regs != NULL) {
                        ahc->tag = rman_get_bustag(regs);
                        ahc->bsh = rman_get_bushandle(regs);
                        if (ahc_pci_test_register_access(ahc) != 0) {
                                device_printf(ahc->dev_softc,
                                       "PCI Device %d:%d:%d failed I/O "
                                       "mapped test.\n",
                                       aic_get_pci_bus(ahc->dev_softc),
                                       aic_get_pci_slot(ahc->dev_softc),
                                       aic_get_pci_function(ahc->dev_softc));
                                bus_release_resource(ahc->dev_softc, regs_type,
                                                     regs_id, regs);
                                regs = NULL;
                        }
                }
        }
        if (regs == NULL) {
                device_printf(ahc->dev_softc,
                              "can't allocate register resources\n");
                return (ENOMEM);
        }
        ahc->platform_data->regs_res_type = regs_type;
        ahc->platform_data->regs_res_id = regs_id;
        ahc->platform_data->regs = regs;
        return (0);
}