/*-
 * 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/ahd_pci.c#17 $
 */

#include <dev/aic7xxx/aic79xx_osm.h>

static int ahd_pci_probe(device_t dev);
static int ahd_pci_attach(device_t dev);

static device_method_t ahd_pci_device_methods[] = {
        /* Device interface */
        DEVMETHOD(device_probe,         ahd_pci_probe),
        DEVMETHOD(device_attach,        ahd_pci_attach),
        DEVMETHOD(device_detach,        ahd_detach),
        DEVMETHOD_END
};

static driver_t ahd_pci_driver = {
        "ahd",
        ahd_pci_device_methods,
        sizeof(struct ahd_softc)
};

DRIVER_MODULE(ahd, pci, ahd_pci_driver, 0, 0);
MODULE_DEPEND(ahd_pci, ahd, 1, 1, 1);
MODULE_VERSION(ahd_pci, 1);

static int
ahd_pci_probe(device_t dev)
{
        struct  ahd_pci_identity *entry;

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

static int
ahd_pci_attach(device_t dev)
{
        struct   ahd_pci_identity *entry;
        struct   ahd_softc *ahd;
        char    *name;
        int      error;

        entry = ahd_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));
        ahd = ahd_alloc(dev, name);
        if (ahd == NULL)
                return (ENOMEM);

        ahd_set_unit(ahd, device_get_unit(dev));

        /*
         * Should we bother disabling 39Bit addressing
         * based on installed memory?
         */
        if (sizeof(bus_addr_t) > 4)
                ahd->flags |= AHD_39BIT_ADDRESSING;

        /* Allocate a dmatag for our SCB DMA maps */
        error = aic_dma_tag_create(ahd, /*parent*/bus_get_dma_tag(dev),
                                   /*alignment*/1, /*boundary*/0,
                                   (ahd->flags & AHD_39BIT_ADDRESSING)
                                   ? 0x7FFFFFFFFF
                                   : BUS_SPACE_MAXADDR_32BIT,
                                   /*highaddr*/BUS_SPACE_MAXADDR,
                                   /*filter*/NULL, /*filterarg*/NULL,
                                   /*maxsize*/BUS_SPACE_MAXSIZE_32BIT,
                                   /*nsegments*/AHD_NSEG,
                                   /*maxsegsz*/AHD_MAXTRANSFER_SIZE,
                                   /*flags*/0,
                                   &ahd->parent_dmat);

        if (error != 0) {
                printf("ahd_pci_attach: Could not allocate DMA tag "
                       "- error %d\n", error);
                ahd_free(ahd);
                return (ENOMEM);
        }
        ahd->dev_softc = dev;
        error = ahd_pci_config(ahd, entry);
        if (error != 0) {
                ahd_free(ahd);
                return (error);
        }

        ahd_sysctl(ahd);
        ahd_attach(ahd);
        return (0);
}

int
ahd_pci_map_registers(struct ahd_softc *ahd)
{
        struct  resource *regs;
        struct  resource *regs2;
        int     regs_type;
        int     regs_id;
        int     regs_id2;
        int     allow_memio;

        regs = NULL;
        regs2 = NULL;
        regs_type = 0;
        regs_id = 0;

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

        if ((ahd->bugs & AHD_PCIX_MMAPIO_BUG) == 0
         && allow_memio != 0) {
                regs_type = SYS_RES_MEMORY;
                regs_id = AHD_PCI_MEMADDR;
                regs = bus_alloc_resource_any(ahd->dev_softc, regs_type,
                                              &regs_id, RF_ACTIVE);
                if (regs != NULL) {
                        int error;

                        ahd->tags[0] = rman_get_bustag(regs);
                        ahd->bshs[0] = rman_get_bushandle(regs);
                        ahd->tags[1] = ahd->tags[0];
                        error = bus_space_subregion(ahd->tags[0], ahd->bshs[0],
                                                    /*offset*/0x100,
                                                    /*size*/0x100,
                                                    &ahd->bshs[1]);
                        /*
                         * Do a quick test to see if memory mapped
                         * I/O is functioning correctly.
                         */
                        if (error != 0
                         || ahd_pci_test_register_access(ahd) != 0) {
                                device_printf(ahd->dev_softc,
                                       "PCI Device %d:%d:%d failed memory "
                                       "mapped test.  Using PIO.\n",
                                       aic_get_pci_bus(ahd->dev_softc),
                                       aic_get_pci_slot(ahd->dev_softc),
                                       aic_get_pci_function(ahd->dev_softc));
                                bus_release_resource(ahd->dev_softc, regs_type,
                                                     regs_id, regs);
                                regs = NULL;
                                AHD_CORRECTABLE_ERROR(ahd);
                        }
                }
        }
        if (regs == NULL) {
                regs_type = SYS_RES_IOPORT;
                regs_id = AHD_PCI_IOADDR0;
                regs = bus_alloc_resource_any(ahd->dev_softc, regs_type,
                                              &regs_id, RF_ACTIVE);
                if (regs == NULL) {
                        device_printf(ahd->dev_softc,
                                      "can't allocate register resources\n");
                        AHD_UNCORRECTABLE_ERROR(ahd);
                        return (ENOMEM);
                }
                ahd->tags[0] = rman_get_bustag(regs);
                ahd->bshs[0] = rman_get_bushandle(regs);

                /* And now the second BAR */
                regs_id2 = AHD_PCI_IOADDR1;
                regs2 = bus_alloc_resource_any(ahd->dev_softc, regs_type,
                                               &regs_id2, RF_ACTIVE);
                if (regs2 == NULL) {
                        device_printf(ahd->dev_softc,
                                      "can't allocate register resources\n");
                        AHD_UNCORRECTABLE_ERROR(ahd);
                        return (ENOMEM);
                }
                ahd->tags[1] = rman_get_bustag(regs2);
                ahd->bshs[1] = rman_get_bushandle(regs2);
                ahd->platform_data->regs_res_type[1] = regs_type;
                ahd->platform_data->regs_res_id[1] = regs_id2;
                ahd->platform_data->regs[1] = regs2;
        }
        ahd->platform_data->regs_res_type[0] = regs_type;
        ahd->platform_data->regs_res_id[0] = regs_id;
        ahd->platform_data->regs[0] = regs;
        return (0);
}

int
ahd_pci_map_int(struct ahd_softc *ahd)
{
        int zero;

        zero = 0;
        ahd->platform_data->irq =
            bus_alloc_resource_any(ahd->dev_softc, SYS_RES_IRQ, &zero,
                                   RF_ACTIVE | RF_SHAREABLE);
        if (ahd->platform_data->irq == NULL)
                return (ENOMEM);
        ahd->platform_data->irq_res_type = SYS_RES_IRQ;
        return (ahd_map_int(ahd));
}