/*
 * Product specific probe and attach routines for:
 *      3940, 2940, aic7895, aic7890, aic7880,
 *      aic7870, aic7860 and aic7850 SCSI controllers
 *
 * Copyright (c) 1994-2001 Justin T. Gibbs.
 * Copyright (c) 2000-2001 Adaptec Inc.
 * 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.
 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
 *    substantially similar to the "NO WARRANTY" disclaimer below
 *    ("Disclaimer") and any redistribution must be conditioned upon
 *    including a substantially similar Disclaimer requirement for further
 *    binary redistribution.
 * 3. Neither the names of the above-listed copyright holders nor the names
 *    of any contributors may 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 General Public License ("GPL") version 2 as published by the Free
 * Software Foundation.
 *
 * NO WARRANTY
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR 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 DAMAGES.
 *
 * $Id: //depot/aic7xxx/aic7xxx/aic7xxx_pci.c#79 $
 */

#include "aic7xxx_osm.h"
#include "aic7xxx_inline.h"
#include "aic7xxx_93cx6.h"
#include "aic7xxx_pci.h"

static inline uint64_t
ahc_compose_id(u_int device, u_int vendor, u_int subdevice, u_int subvendor)
{
        uint64_t id;

        id = subvendor
           | (subdevice << 16)
           | ((uint64_t)vendor << 32)
           | ((uint64_t)device << 48);

        return (id);
}

#define AHC_PCI_IOADDR  PCIR_MAPS       /* I/O Address */
#define AHC_PCI_MEMADDR (PCIR_MAPS + 4) /* Mem I/O Address */

#define DEVID_9005_TYPE(id) ((id) & 0xF)
#define         DEVID_9005_TYPE_HBA             0x0     /* Standard Card */
#define         DEVID_9005_TYPE_AAA             0x3     /* RAID Card */
#define         DEVID_9005_TYPE_SISL            0x5     /* Container ROMB */
#define         DEVID_9005_TYPE_MB              0xF     /* On Motherboard */

#define DEVID_9005_MAXRATE(id) (((id) & 0x30) >> 4)
#define         DEVID_9005_MAXRATE_U160         0x0
#define         DEVID_9005_MAXRATE_ULTRA2       0x1
#define         DEVID_9005_MAXRATE_ULTRA        0x2
#define         DEVID_9005_MAXRATE_FAST         0x3

#define DEVID_9005_MFUNC(id) (((id) & 0x40) >> 6)

#define DEVID_9005_CLASS(id) (((id) & 0xFF00) >> 8)
#define         DEVID_9005_CLASS_SPI            0x0     /* Parallel SCSI */

#define SUBID_9005_TYPE(id) ((id) & 0xF)
#define         SUBID_9005_TYPE_MB              0xF     /* On Motherboard */
#define         SUBID_9005_TYPE_CARD            0x0     /* Standard Card */
#define         SUBID_9005_TYPE_LCCARD          0x1     /* Low Cost Card */
#define         SUBID_9005_TYPE_RAID            0x3     /* Combined with Raid */

#define SUBID_9005_TYPE_KNOWN(id)                       \
          ((((id) & 0xF) == SUBID_9005_TYPE_MB)         \
        || (((id) & 0xF) == SUBID_9005_TYPE_CARD)       \
        || (((id) & 0xF) == SUBID_9005_TYPE_LCCARD)     \
        || (((id) & 0xF) == SUBID_9005_TYPE_RAID))

#define SUBID_9005_MAXRATE(id) (((id) & 0x30) >> 4)
#define         SUBID_9005_MAXRATE_ULTRA2       0x0
#define         SUBID_9005_MAXRATE_ULTRA        0x1
#define         SUBID_9005_MAXRATE_U160         0x2
#define         SUBID_9005_MAXRATE_RESERVED     0x3

#define SUBID_9005_SEEPTYPE(id)                                         \
        ((SUBID_9005_TYPE(id) == SUBID_9005_TYPE_MB)                    \
         ? ((id) & 0xC0) >> 6                                           \
         : ((id) & 0x300) >> 8)
#define         SUBID_9005_SEEPTYPE_NONE        0x0
#define         SUBID_9005_SEEPTYPE_1K          0x1
#define         SUBID_9005_SEEPTYPE_2K_4K       0x2
#define         SUBID_9005_SEEPTYPE_RESERVED    0x3
#define SUBID_9005_AUTOTERM(id)                                         \
        ((SUBID_9005_TYPE(id) == SUBID_9005_TYPE_MB)                    \
         ? (((id) & 0x400) >> 10) == 0                                  \
         : (((id) & 0x40) >> 6) == 0)

#define SUBID_9005_NUMCHAN(id)                                          \
        ((SUBID_9005_TYPE(id) == SUBID_9005_TYPE_MB)                    \
         ? ((id) & 0x300) >> 8                                          \
         : ((id) & 0xC00) >> 10)

#define SUBID_9005_LEGACYCONN(id)                                       \
        ((SUBID_9005_TYPE(id) == SUBID_9005_TYPE_MB)                    \
         ? 0                                                            \
         : ((id) & 0x80) >> 7)

#define SUBID_9005_MFUNCENB(id)                                         \
        ((SUBID_9005_TYPE(id) == SUBID_9005_TYPE_MB)                    \
         ? ((id) & 0x800) >> 11                                         \
         : ((id) & 0x1000) >> 12)
/*
 * Informational only. Should use chip register to be
 * certain, but may be use in identification strings.
 */
#define SUBID_9005_CARD_SCSIWIDTH_MASK  0x2000
#define SUBID_9005_CARD_PCIWIDTH_MASK   0x4000
#define SUBID_9005_CARD_SEDIFF_MASK     0x8000

static ahc_device_setup_t ahc_aic785X_setup;
static ahc_device_setup_t ahc_aic7860_setup;
static ahc_device_setup_t ahc_apa1480_setup;
static ahc_device_setup_t ahc_aic7870_setup;
static ahc_device_setup_t ahc_aic7870h_setup;
static ahc_device_setup_t ahc_aha394X_setup;
static ahc_device_setup_t ahc_aha394Xh_setup;
static ahc_device_setup_t ahc_aha494X_setup;
static ahc_device_setup_t ahc_aha494Xh_setup;
static ahc_device_setup_t ahc_aha398X_setup;
static ahc_device_setup_t ahc_aic7880_setup;
static ahc_device_setup_t ahc_aic7880h_setup;
static ahc_device_setup_t ahc_aha2940Pro_setup;
static ahc_device_setup_t ahc_aha394XU_setup;
static ahc_device_setup_t ahc_aha394XUh_setup;
static ahc_device_setup_t ahc_aha398XU_setup;
static ahc_device_setup_t ahc_aic7890_setup;
static ahc_device_setup_t ahc_aic7892_setup;
static ahc_device_setup_t ahc_aic7895_setup;
static ahc_device_setup_t ahc_aic7895h_setup;
static ahc_device_setup_t ahc_aic7896_setup;
static ahc_device_setup_t ahc_aic7899_setup;
static ahc_device_setup_t ahc_aha29160C_setup;
static ahc_device_setup_t ahc_raid_setup;
static ahc_device_setup_t ahc_aha394XX_setup;
static ahc_device_setup_t ahc_aha494XX_setup;
static ahc_device_setup_t ahc_aha398XX_setup;

static const struct ahc_pci_identity ahc_pci_ident_table[] = {
        /* aic7850 based controllers */
        {
                ID_AHA_2902_04_10_15_20C_30C,
                ID_ALL_MASK,
                "Adaptec 2902/04/10/15/20C/30C SCSI adapter",
                ahc_aic785X_setup
        },
        /* aic7860 based controllers */
        {
                ID_AHA_2930CU,
                ID_ALL_MASK,
                "Adaptec 2930CU SCSI adapter",
                ahc_aic7860_setup
        },
        {
                ID_AHA_1480A & ID_DEV_VENDOR_MASK,
                ID_DEV_VENDOR_MASK,
                "Adaptec 1480A Ultra SCSI adapter",
                ahc_apa1480_setup
        },
        {
                ID_AHA_2940AU_0 & ID_DEV_VENDOR_MASK,
                ID_DEV_VENDOR_MASK,
                "Adaptec 2940A Ultra SCSI adapter",
                ahc_aic7860_setup
        },
        {
                ID_AHA_2940AU_CN & ID_DEV_VENDOR_MASK,
                ID_DEV_VENDOR_MASK,
                "Adaptec 2940A/CN Ultra SCSI adapter",
                ahc_aic7860_setup
        },
        {
                ID_AHA_2930C_VAR & ID_DEV_VENDOR_MASK,
                ID_DEV_VENDOR_MASK,
                "Adaptec 2930C Ultra SCSI adapter (VAR)",
                ahc_aic7860_setup
        },
        /* aic7870 based controllers */
        {
                ID_AHA_2940,
                ID_ALL_MASK,
                "Adaptec 2940 SCSI adapter",
                ahc_aic7870_setup
        },
        {
                ID_AHA_3940,
                ID_ALL_MASK,
                "Adaptec 3940 SCSI adapter",
                ahc_aha394X_setup
        },
        {
                ID_AHA_398X,
                ID_ALL_MASK,
                "Adaptec 398X SCSI RAID adapter",
                ahc_aha398X_setup
        },
        {
                ID_AHA_2944,
                ID_ALL_MASK,
                "Adaptec 2944 SCSI adapter",
                ahc_aic7870h_setup
        },
        {
                ID_AHA_3944,
                ID_ALL_MASK,
                "Adaptec 3944 SCSI adapter",
                ahc_aha394Xh_setup
        },
        {
                ID_AHA_4944,
                ID_ALL_MASK,
                "Adaptec 4944 SCSI adapter",
                ahc_aha494Xh_setup
        },
        /* aic7880 based controllers */
        {
                ID_AHA_2940U & ID_DEV_VENDOR_MASK,
                ID_DEV_VENDOR_MASK,
                "Adaptec 2940 Ultra SCSI adapter",
                ahc_aic7880_setup
        },
        {
                ID_AHA_3940U & ID_DEV_VENDOR_MASK,
                ID_DEV_VENDOR_MASK,
                "Adaptec 3940 Ultra SCSI adapter",
                ahc_aha394XU_setup
        },
        {
                ID_AHA_2944U & ID_DEV_VENDOR_MASK,
                ID_DEV_VENDOR_MASK,
                "Adaptec 2944 Ultra SCSI adapter",
                ahc_aic7880h_setup
        },
        {
                ID_AHA_3944U & ID_DEV_VENDOR_MASK,
                ID_DEV_VENDOR_MASK,
                "Adaptec 3944 Ultra SCSI adapter",
                ahc_aha394XUh_setup
        },
        {
                ID_AHA_398XU & ID_DEV_VENDOR_MASK,
                ID_DEV_VENDOR_MASK,
                "Adaptec 398X Ultra SCSI RAID adapter",
                ahc_aha398XU_setup
        },
        {
                /*
                 * XXX Don't know the slot numbers
                 * so we can't identify channels
                 */
                ID_AHA_4944U & ID_DEV_VENDOR_MASK,
                ID_DEV_VENDOR_MASK,
                "Adaptec 4944 Ultra SCSI adapter",
                ahc_aic7880h_setup
        },
        {
                ID_AHA_2930U & ID_DEV_VENDOR_MASK,
                ID_DEV_VENDOR_MASK,
                "Adaptec 2930 Ultra SCSI adapter",
                ahc_aic7880_setup
        },
        {
                ID_AHA_2940U_PRO & ID_DEV_VENDOR_MASK,
                ID_DEV_VENDOR_MASK,
                "Adaptec 2940 Pro Ultra SCSI adapter",
                ahc_aha2940Pro_setup
        },
        {
                ID_AHA_2940U_CN & ID_DEV_VENDOR_MASK,
                ID_DEV_VENDOR_MASK,
                "Adaptec 2940/CN Ultra SCSI adapter",
                ahc_aic7880_setup
        },
        /* Ignore all SISL (AAC on MB) based controllers. */
        {
                ID_9005_SISL_ID,
                ID_9005_SISL_MASK,
                NULL,
                NULL
        },
        /* aic7890 based controllers */
        {
                ID_AHA_2930U2,
                ID_ALL_MASK,
                "Adaptec 2930 Ultra2 SCSI adapter",
                ahc_aic7890_setup
        },
        {
                ID_AHA_2940U2B,
                ID_ALL_MASK,
                "Adaptec 2940B Ultra2 SCSI adapter",
                ahc_aic7890_setup
        },
        {
                ID_AHA_2940U2_OEM,
                ID_ALL_MASK,
                "Adaptec 2940 Ultra2 SCSI adapter (OEM)",
                ahc_aic7890_setup
        },
        {
                ID_AHA_2940U2,
                ID_ALL_MASK,
                "Adaptec 2940 Ultra2 SCSI adapter",
                ahc_aic7890_setup
        },
        {
                ID_AHA_2950U2B,
                ID_ALL_MASK,
                "Adaptec 2950 Ultra2 SCSI adapter",
                ahc_aic7890_setup
        },
        {
                ID_AIC7890_ARO,
                ID_ALL_MASK,
                "Adaptec aic7890/91 Ultra2 SCSI adapter (ARO)",
                ahc_aic7890_setup
        },
        {
                ID_AAA_131U2,
                ID_ALL_MASK,
                "Adaptec AAA-131 Ultra2 RAID adapter",
                ahc_aic7890_setup
        },
        /* aic7892 based controllers */
        {
                ID_AHA_29160,
                ID_ALL_MASK,
                "Adaptec 29160 Ultra160 SCSI adapter",
                ahc_aic7892_setup
        },
        {
                ID_AHA_29160_CPQ,
                ID_ALL_MASK,
                "Adaptec (Compaq OEM) 29160 Ultra160 SCSI adapter",
                ahc_aic7892_setup
        },
        {
                ID_AHA_29160N,
                ID_ALL_MASK,
                "Adaptec 29160N Ultra160 SCSI adapter",
                ahc_aic7892_setup
        },
        {
                ID_AHA_29160C,
                ID_ALL_MASK,
                "Adaptec 29160C Ultra160 SCSI adapter",
                ahc_aha29160C_setup
        },
        {
                ID_AHA_29160B,
                ID_ALL_MASK,
                "Adaptec 29160B Ultra160 SCSI adapter",
                ahc_aic7892_setup
        },
        {
                ID_AHA_19160B,
                ID_ALL_MASK,
                "Adaptec 19160B Ultra160 SCSI adapter",
                ahc_aic7892_setup
        },
        {
                ID_AIC7892_ARO,
                ID_ALL_MASK,
                "Adaptec aic7892 Ultra160 SCSI adapter (ARO)",
                ahc_aic7892_setup
        },
        {
                ID_AHA_2915_30LP,
                ID_ALL_MASK,
                "Adaptec 2915/30LP Ultra160 SCSI adapter",
                ahc_aic7892_setup
        },
        /* aic7895 based controllers */ 
        {
                ID_AHA_2940U_DUAL,
                ID_ALL_MASK,
                "Adaptec 2940/DUAL Ultra SCSI adapter",
                ahc_aic7895_setup
        },
        {
                ID_AHA_3940AU,
                ID_ALL_MASK,
                "Adaptec 3940A Ultra SCSI adapter",
                ahc_aic7895_setup
        },
        {
                ID_AHA_3944AU,
                ID_ALL_MASK,
                "Adaptec 3944A Ultra SCSI adapter",
                ahc_aic7895h_setup
        },
        {
                ID_AIC7895_ARO,
                ID_AIC7895_ARO_MASK,
                "Adaptec aic7895 Ultra SCSI adapter (ARO)",
                ahc_aic7895_setup
        },
        /* aic7896/97 based controllers */      
        {
                ID_AHA_3950U2B_0,
                ID_ALL_MASK,
                "Adaptec 3950B Ultra2 SCSI adapter",
                ahc_aic7896_setup
        },
        {
                ID_AHA_3950U2B_1,
                ID_ALL_MASK,
                "Adaptec 3950B Ultra2 SCSI adapter",
                ahc_aic7896_setup
        },
        {
                ID_AHA_3950U2D_0,
                ID_ALL_MASK,
                "Adaptec 3950D Ultra2 SCSI adapter",
                ahc_aic7896_setup
        },
        {
                ID_AHA_3950U2D_1,
                ID_ALL_MASK,
                "Adaptec 3950D Ultra2 SCSI adapter",
                ahc_aic7896_setup
        },
        {
                ID_AIC7896_ARO,
                ID_ALL_MASK,
                "Adaptec aic7896/97 Ultra2 SCSI adapter (ARO)",
                ahc_aic7896_setup
        },
        /* aic7899 based controllers */ 
        {
                ID_AHA_3960D,
                ID_ALL_MASK,
                "Adaptec 3960D Ultra160 SCSI adapter",
                ahc_aic7899_setup
        },
        {
                ID_AHA_3960D_CPQ,
                ID_ALL_MASK,
                "Adaptec (Compaq OEM) 3960D Ultra160 SCSI adapter",
                ahc_aic7899_setup
        },
        {
                ID_AIC7899_ARO,
                ID_ALL_MASK,
                "Adaptec aic7899 Ultra160 SCSI adapter (ARO)",
                ahc_aic7899_setup
        },
        /* Generic chip probes for devices we don't know 'exactly' */
        {
                ID_AIC7850 & ID_DEV_VENDOR_MASK,
                ID_DEV_VENDOR_MASK,
                "Adaptec aic7850 SCSI adapter",
                ahc_aic785X_setup
        },
        {
                ID_AIC7855 & ID_DEV_VENDOR_MASK,
                ID_DEV_VENDOR_MASK,
                "Adaptec aic7855 SCSI adapter",
                ahc_aic785X_setup
        },
        {
                ID_AIC7859 & ID_DEV_VENDOR_MASK,
                ID_DEV_VENDOR_MASK,
                "Adaptec aic7859 SCSI adapter",
                ahc_aic7860_setup
        },
        {
                ID_AIC7860 & ID_DEV_VENDOR_MASK,
                ID_DEV_VENDOR_MASK,
                "Adaptec aic7860 Ultra SCSI adapter",
                ahc_aic7860_setup
        },
        {
                ID_AIC7870 & ID_DEV_VENDOR_MASK,
                ID_DEV_VENDOR_MASK,
                "Adaptec aic7870 SCSI adapter",
                ahc_aic7870_setup
        },
        {
                ID_AIC7880 & ID_DEV_VENDOR_MASK,
                ID_DEV_VENDOR_MASK,
                "Adaptec aic7880 Ultra SCSI adapter",
                ahc_aic7880_setup
        },
        {
                ID_AIC7890 & ID_9005_GENERIC_MASK,
                ID_9005_GENERIC_MASK,
                "Adaptec aic7890/91 Ultra2 SCSI adapter",
                ahc_aic7890_setup
        },
        {
                ID_AIC7892 & ID_9005_GENERIC_MASK,
                ID_9005_GENERIC_MASK,
                "Adaptec aic7892 Ultra160 SCSI adapter",
                ahc_aic7892_setup
        },
        {
                ID_AIC7895 & ID_DEV_VENDOR_MASK,
                ID_DEV_VENDOR_MASK,
                "Adaptec aic7895 Ultra SCSI adapter",
                ahc_aic7895_setup
        },
        {
                ID_AIC7896 & ID_9005_GENERIC_MASK,
                ID_9005_GENERIC_MASK,
                "Adaptec aic7896/97 Ultra2 SCSI adapter",
                ahc_aic7896_setup
        },
        {
                ID_AIC7899 & ID_9005_GENERIC_MASK,
                ID_9005_GENERIC_MASK,
                "Adaptec aic7899 Ultra160 SCSI adapter",
                ahc_aic7899_setup
        },
        {
                ID_AIC7810 & ID_DEV_VENDOR_MASK,
                ID_DEV_VENDOR_MASK,
                "Adaptec aic7810 RAID memory controller",
                ahc_raid_setup
        },
        {
                ID_AIC7815 & ID_DEV_VENDOR_MASK,
                ID_DEV_VENDOR_MASK,
                "Adaptec aic7815 RAID memory controller",
                ahc_raid_setup
        }
};

static const u_int ahc_num_pci_devs = ARRAY_SIZE(ahc_pci_ident_table);
                
#define AHC_394X_SLOT_CHANNEL_A 4
#define AHC_394X_SLOT_CHANNEL_B 5

#define AHC_398X_SLOT_CHANNEL_A 4
#define AHC_398X_SLOT_CHANNEL_B 8
#define AHC_398X_SLOT_CHANNEL_C 12

#define AHC_494X_SLOT_CHANNEL_A 4
#define AHC_494X_SLOT_CHANNEL_B 5
#define AHC_494X_SLOT_CHANNEL_C 6
#define AHC_494X_SLOT_CHANNEL_D 7

#define DEVCONFIG               0x40
#define         PCIERRGENDIS    0x80000000ul
#define         SCBSIZE32       0x00010000ul    /* aic789X only */
#define         REXTVALID       0x00001000ul    /* ultra cards only */
#define         MPORTMODE       0x00000400ul    /* aic7870+ only */
#define         RAMPSM          0x00000200ul    /* aic7870+ only */
#define         VOLSENSE        0x00000100ul
#define         PCI64BIT        0x00000080ul    /* 64Bit PCI bus (Ultra2 Only)*/
#define         SCBRAMSEL       0x00000080ul
#define         MRDCEN          0x00000040ul
#define         EXTSCBTIME      0x00000020ul    /* aic7870 only */
#define         EXTSCBPEN       0x00000010ul    /* aic7870 only */
#define         BERREN          0x00000008ul
#define         DACEN           0x00000004ul
#define         STPWLEVEL       0x00000002ul
#define         DIFACTNEGEN     0x00000001ul    /* aic7870 only */

#define CSIZE_LATTIME           0x0c
#define         CACHESIZE       0x0000003ful    /* only 5 bits */
#define         LATTIME         0x0000ff00ul

/* PCI STATUS definitions */
#define DPE     0x80
#define SSE     0x40
#define RMA     0x20
#define RTA     0x10
#define STA     0x08
#define DPR     0x01

static int ahc_9005_subdevinfo_valid(uint16_t device, uint16_t vendor,
                                     uint16_t subdevice, uint16_t subvendor);
static int ahc_ext_scbram_present(struct ahc_softc *ahc);
static void ahc_scbram_config(struct ahc_softc *ahc, int enable,
                                  int pcheck, int fast, int large);
static void ahc_probe_ext_scbram(struct ahc_softc *ahc);
static void check_extport(struct ahc_softc *ahc, u_int *sxfrctl1);
static void ahc_parse_pci_eeprom(struct ahc_softc *ahc,
                                 struct seeprom_config *sc);
static void configure_termination(struct ahc_softc *ahc,
                                  struct seeprom_descriptor *sd,
                                  u_int adapter_control,
                                  u_int *sxfrctl1);

static void ahc_new_term_detect(struct ahc_softc *ahc,
                                int *enableSEC_low,
                                int *enableSEC_high,
                                int *enablePRI_low,
                                int *enablePRI_high,
                                int *eeprom_present);
static void aic787X_cable_detect(struct ahc_softc *ahc, int *internal50_present,
                                 int *internal68_present,
                                 int *externalcable_present,
                                 int *eeprom_present);
static void aic785X_cable_detect(struct ahc_softc *ahc, int *internal50_present,
                                 int *externalcable_present,
                                 int *eeprom_present);
static void    write_brdctl(struct ahc_softc *ahc, uint8_t value);
static uint8_t read_brdctl(struct ahc_softc *ahc);
static void ahc_pci_intr(struct ahc_softc *ahc);
static int  ahc_pci_chip_init(struct ahc_softc *ahc);

static int
ahc_9005_subdevinfo_valid(uint16_t device, uint16_t vendor,
                          uint16_t subdevice, uint16_t subvendor)
{
        int result;

        /* Default to invalid. */
        result = 0;
        if (vendor == 0x9005
         && subvendor == 0x9005
         && subdevice != device
         && SUBID_9005_TYPE_KNOWN(subdevice) != 0) {

                switch (SUBID_9005_TYPE(subdevice)) {
                case SUBID_9005_TYPE_MB:
                        break;
                case SUBID_9005_TYPE_CARD:
                case SUBID_9005_TYPE_LCCARD:
                        /*
                         * Currently only trust Adaptec cards to
                         * get the sub device info correct.
                         */
                        if (DEVID_9005_TYPE(device) == DEVID_9005_TYPE_HBA)
                                result = 1;
                        break;
                case SUBID_9005_TYPE_RAID:
                        break;
                default:
                        break;
                }
        }
        return (result);
}

const struct ahc_pci_identity *
ahc_find_pci_device(ahc_dev_softc_t pci)
{
        uint64_t  full_id;
        uint16_t  device;
        uint16_t  vendor;
        uint16_t  subdevice;
        uint16_t  subvendor;
        const struct ahc_pci_identity *entry;
        u_int     i;

        vendor = ahc_pci_read_config(pci, PCIR_DEVVENDOR, /*bytes*/2);
        device = ahc_pci_read_config(pci, PCIR_DEVICE, /*bytes*/2);
        subvendor = ahc_pci_read_config(pci, PCIR_SUBVEND_0, /*bytes*/2);
        subdevice = ahc_pci_read_config(pci, PCIR_SUBDEV_0, /*bytes*/2);
        full_id = ahc_compose_id(device, vendor, subdevice, subvendor);

        /*
         * If the second function is not hooked up, ignore it.
         * Unfortunately, not all MB vendors implement the
         * subdevice ID as per the Adaptec spec, so do our best
         * to sanity check it prior to accepting the subdevice
         * ID as valid.
         */
        if (ahc_get_pci_function(pci) > 0
         && ahc_9005_subdevinfo_valid(device, vendor, subdevice, subvendor)
         && SUBID_9005_MFUNCENB(subdevice) == 0)
                return (NULL);

        for (i = 0; i < ahc_num_pci_devs; i++) {
                entry = &ahc_pci_ident_table[i];
                if (entry->full_id == (full_id & entry->id_mask)) {
                        /* Honor exclusion entries. */
                        if (entry->name == NULL)
                                return (NULL);
                        return (entry);
                }
        }
        return (NULL);
}

int
ahc_pci_config(struct ahc_softc *ahc, const struct ahc_pci_identity *entry)
{
        u_int    command;
        u_int    our_id;
        u_int    sxfrctl1;
        u_int    scsiseq;
        u_int    dscommand0;
        uint32_t devconfig;
        int      error;
        uint8_t  sblkctl;

        our_id = 0;
        error = entry->setup(ahc);
        if (error != 0)
                return (error);
        ahc->chip |= AHC_PCI;
        ahc->description = entry->name;

        pci_set_power_state(ahc->dev_softc, AHC_POWER_STATE_D0);

        error = ahc_pci_map_registers(ahc);
        if (error != 0)
                return (error);

        /*
         * Before we continue probing the card, ensure that
         * its interrupts are *disabled*.  We don't want
         * a misstep to hang the machine in an interrupt
         * storm.
         */
        ahc_intr_enable(ahc, FALSE);

        devconfig = ahc_pci_read_config(ahc->dev_softc, DEVCONFIG, /*bytes*/4);

        /*
         * If we need to support high memory, enable dual
         * address cycles.  This bit must be set to enable
         * high address bit generation even if we are on a
         * 64bit bus (PCI64BIT set in devconfig).
         */
        if ((ahc->flags & AHC_39BIT_ADDRESSING) != 0) {

                if (bootverbose)
                        printk("%s: Enabling 39Bit Addressing\n",
                               ahc_name(ahc));
                devconfig |= DACEN;
        }
        
        /* Ensure that pci error generation, a test feature, is disabled. */
        devconfig |= PCIERRGENDIS;

        ahc_pci_write_config(ahc->dev_softc, DEVCONFIG, devconfig, /*bytes*/4);

        /* Ensure busmastering is enabled */
        command = ahc_pci_read_config(ahc->dev_softc, PCIR_COMMAND, /*bytes*/2);
        command |= PCIM_CMD_BUSMASTEREN;

        ahc_pci_write_config(ahc->dev_softc, PCIR_COMMAND, command, /*bytes*/2);

        /* On all PCI adapters, we allow SCB paging */
        ahc->flags |= AHC_PAGESCBS;

        error = ahc_softc_init(ahc);
        if (error != 0)
                return (error);

        /*
         * Disable PCI parity error checking.  Users typically
         * do this to work around broken PCI chipsets that get
         * the parity timing wrong and thus generate lots of spurious
         * errors.  The chip only allows us to disable *all* parity
         * error reporting when doing this, so CIO bus, scb ram, and
         * scratch ram parity errors will be ignored too.
         */
        if ((ahc->flags & AHC_DISABLE_PCI_PERR) != 0)
                ahc->seqctl |= FAILDIS;

        ahc->bus_intr = ahc_pci_intr;
        ahc->bus_chip_init = ahc_pci_chip_init;

        /* Remember how the card was setup in case there is no SEEPROM */
        if ((ahc_inb(ahc, HCNTRL) & POWRDN) == 0) {
                ahc_pause(ahc);
                if ((ahc->features & AHC_ULTRA2) != 0)
                        our_id = ahc_inb(ahc, SCSIID_ULTRA2) & OID;
                else
                        our_id = ahc_inb(ahc, SCSIID) & OID;
                sxfrctl1 = ahc_inb(ahc, SXFRCTL1) & STPWEN;
                scsiseq = ahc_inb(ahc, SCSISEQ);
        } else {
                sxfrctl1 = STPWEN;
                our_id = 7;
                scsiseq = 0;
        }

        error = ahc_reset(ahc, /*reinit*/FALSE);
        if (error != 0)
                return (ENXIO);

        if ((ahc->features & AHC_DT) != 0) {
                u_int sfunct;

                /* Perform ALT-Mode Setup */
                sfunct = ahc_inb(ahc, SFUNCT) & ~ALT_MODE;
                ahc_outb(ahc, SFUNCT, sfunct | ALT_MODE);
                ahc_outb(ahc, OPTIONMODE,
                         OPTIONMODE_DEFAULTS|AUTOACKEN|BUSFREEREV|EXPPHASEDIS);
                ahc_outb(ahc, SFUNCT, sfunct);

                /* Normal mode setup */
                ahc_outb(ahc, CRCCONTROL1, CRCVALCHKEN|CRCENDCHKEN|CRCREQCHKEN
                                          |TARGCRCENDEN);
        }

        dscommand0 = ahc_inb(ahc, DSCOMMAND0);
        dscommand0 |= MPARCKEN|CACHETHEN;
        if ((ahc->features & AHC_ULTRA2) != 0) {

                /*
                 * DPARCKEN doesn't work correctly on
                 * some MBs so don't use it.
                 */
                dscommand0 &= ~DPARCKEN;
        }

        /*
         * Handle chips that must have cache line
         * streaming (dis/en)abled.
         */
        if ((ahc->bugs & AHC_CACHETHEN_DIS_BUG) != 0)
                dscommand0 |= CACHETHEN;

        if ((ahc->bugs & AHC_CACHETHEN_BUG) != 0)
                dscommand0 &= ~CACHETHEN;

        ahc_outb(ahc, DSCOMMAND0, dscommand0);

        ahc->pci_cachesize =
            ahc_pci_read_config(ahc->dev_softc, CSIZE_LATTIME,
                                /*bytes*/1) & CACHESIZE;
        ahc->pci_cachesize *= 4;

        if ((ahc->bugs & AHC_PCI_2_1_RETRY_BUG) != 0
         && ahc->pci_cachesize == 4) {

                ahc_pci_write_config(ahc->dev_softc, CSIZE_LATTIME,
                                     0, /*bytes*/1);
                ahc->pci_cachesize = 0;
        }

        /*
         * We cannot perform ULTRA speeds without the presence
         * of the external precision resistor.
         */
        if ((ahc->features & AHC_ULTRA) != 0) {
                uint32_t devconfig;

                devconfig = ahc_pci_read_config(ahc->dev_softc,
                                                DEVCONFIG, /*bytes*/4);
                if ((devconfig & REXTVALID) == 0)
                        ahc->features &= ~AHC_ULTRA;
        }

        /* See if we have a SEEPROM and perform auto-term */
        check_extport(ahc, &sxfrctl1);

        /*
         * Take the LED out of diagnostic mode
         */
        sblkctl = ahc_inb(ahc, SBLKCTL);
        ahc_outb(ahc, SBLKCTL, (sblkctl & ~(DIAGLEDEN|DIAGLEDON)));

        if ((ahc->features & AHC_ULTRA2) != 0) {
                ahc_outb(ahc, DFF_THRSH, RD_DFTHRSH_MAX|WR_DFTHRSH_MAX);
        } else {
                ahc_outb(ahc, DSPCISTATUS, DFTHRSH_100);
        }

        if (ahc->flags & AHC_USEDEFAULTS) {
                /*
                 * PCI Adapter default setup
                 * Should only be used if the adapter does not have
                 * a SEEPROM.
                 */
                /* See if someone else set us up already */
                if ((ahc->flags & AHC_NO_BIOS_INIT) == 0
                 && scsiseq != 0) {
                        printk("%s: Using left over BIOS settings\n",
                                ahc_name(ahc));
                        ahc->flags &= ~AHC_USEDEFAULTS;
                        ahc->flags |= AHC_BIOS_ENABLED;
                } else {
                        /*
                         * Assume only one connector and always turn
                         * on termination.
                         */
                        our_id = 0x07;
                        sxfrctl1 = STPWEN;
                }
                ahc_outb(ahc, SCSICONF, our_id|ENSPCHK|RESET_SCSI);

                ahc->our_id = our_id;
        }

        /*
         * Take a look to see if we have external SRAM.
         * We currently do not attempt to use SRAM that is
         * shared among multiple controllers.
         */
        ahc_probe_ext_scbram(ahc);

        /*
         * Record our termination setting for the
         * generic initialization routine.
         */
        if ((sxfrctl1 & STPWEN) != 0)
                ahc->flags |= AHC_TERM_ENB_A;

        /*
         * Save chip register configuration data for chip resets
         * that occur during runtime and resume events.
         */
        ahc->bus_softc.pci_softc.devconfig =
            ahc_pci_read_config(ahc->dev_softc, DEVCONFIG, /*bytes*/4);
        ahc->bus_softc.pci_softc.command =
            ahc_pci_read_config(ahc->dev_softc, PCIR_COMMAND, /*bytes*/1);
        ahc->bus_softc.pci_softc.csize_lattime =
            ahc_pci_read_config(ahc->dev_softc, CSIZE_LATTIME, /*bytes*/1);
        ahc->bus_softc.pci_softc.dscommand0 = ahc_inb(ahc, DSCOMMAND0);
        ahc->bus_softc.pci_softc.dspcistatus = ahc_inb(ahc, DSPCISTATUS);
        if ((ahc->features & AHC_DT) != 0) {
                u_int sfunct;

                sfunct = ahc_inb(ahc, SFUNCT) & ~ALT_MODE;
                ahc_outb(ahc, SFUNCT, sfunct | ALT_MODE);
                ahc->bus_softc.pci_softc.optionmode = ahc_inb(ahc, OPTIONMODE);
                ahc->bus_softc.pci_softc.targcrccnt = ahc_inw(ahc, TARGCRCCNT);
                ahc_outb(ahc, SFUNCT, sfunct);
                ahc->bus_softc.pci_softc.crccontrol1 =
                    ahc_inb(ahc, CRCCONTROL1);
        }
        if ((ahc->features & AHC_MULTI_FUNC) != 0)
                ahc->bus_softc.pci_softc.scbbaddr = ahc_inb(ahc, SCBBADDR);

        if ((ahc->features & AHC_ULTRA2) != 0)
                ahc->bus_softc.pci_softc.dff_thrsh = ahc_inb(ahc, DFF_THRSH);

        /* Core initialization */
        error = ahc_init(ahc);
        if (error != 0)
                return (error);
        ahc->init_level++;

        /*
         * Allow interrupts now that we are completely setup.
         */
        return ahc_pci_map_int(ahc);
}

/*
 * Test for the presence of external sram in an
 * "unshared" configuration.
 */
static int
ahc_ext_scbram_present(struct ahc_softc *ahc)
{
        u_int chip;
        int ramps;
        int single_user;
        uint32_t devconfig;

        chip = ahc->chip & AHC_CHIPID_MASK;
        devconfig = ahc_pci_read_config(ahc->dev_softc,
                                        DEVCONFIG, /*bytes*/4);
        single_user = (devconfig & MPORTMODE) != 0;

        if ((ahc->features & AHC_ULTRA2) != 0)
                ramps = (ahc_inb(ahc, DSCOMMAND0) & RAMPS) != 0;
        else if (chip == AHC_AIC7895 || chip == AHC_AIC7895C)
                /*
                 * External SCBRAM arbitration is flakey
                 * on these chips.  Unfortunately this means
                 * we don't use the extra SCB ram space on the
                 * 3940AUW.
                 */
                ramps = 0;
        else if (chip >= AHC_AIC7870)
                ramps = (devconfig & RAMPSM) != 0;
        else
                ramps = 0;

        if (ramps && single_user)
                return (1);
        return (0);
}

/*
 * Enable external scbram.
 */
static void
ahc_scbram_config(struct ahc_softc *ahc, int enable, int pcheck,
                  int fast, int large)
{
        uint32_t devconfig;

        if (ahc->features & AHC_MULTI_FUNC) {
                /*
                 * Set the SCB Base addr (highest address bit)
                 * depending on which channel we are.
                 */
                ahc_outb(ahc, SCBBADDR, ahc_get_pci_function(ahc->dev_softc));
        }

        ahc->flags &= ~AHC_LSCBS_ENABLED;
        if (large)
                ahc->flags |= AHC_LSCBS_ENABLED;
        devconfig = ahc_pci_read_config(ahc->dev_softc, DEVCONFIG, /*bytes*/4);
        if ((ahc->features & AHC_ULTRA2) != 0) {
                u_int dscommand0;

                dscommand0 = ahc_inb(ahc, DSCOMMAND0);
                if (enable)
                        dscommand0 &= ~INTSCBRAMSEL;
                else
                        dscommand0 |= INTSCBRAMSEL;
                if (large)
                        dscommand0 &= ~USCBSIZE32;
                else
                        dscommand0 |= USCBSIZE32;
                ahc_outb(ahc, DSCOMMAND0, dscommand0);
        } else {
                if (fast)
                        devconfig &= ~EXTSCBTIME;
                else
                        devconfig |= EXTSCBTIME;
                if (enable)
                        devconfig &= ~SCBRAMSEL;
                else
                        devconfig |= SCBRAMSEL;
                if (large)
                        devconfig &= ~SCBSIZE32;
                else
                        devconfig |= SCBSIZE32;
        }
        if (pcheck)
                devconfig |= EXTSCBPEN;
        else
                devconfig &= ~EXTSCBPEN;

        ahc_pci_write_config(ahc->dev_softc, DEVCONFIG, devconfig, /*bytes*/4);
}

/*
 * Take a look to see if we have external SRAM.
 * We currently do not attempt to use SRAM that is
 * shared among multiple controllers.
 */
static void
ahc_probe_ext_scbram(struct ahc_softc *ahc)
{
        int num_scbs;
        int test_num_scbs;
        int enable;
        int pcheck;
        int fast;
        int large;

        enable = FALSE;
        pcheck = FALSE;
        fast = FALSE;
        large = FALSE;
        num_scbs = 0;
        
        if (ahc_ext_scbram_present(ahc) == 0)
                goto done;

        /*
         * Probe for the best parameters to use.
         */
        ahc_scbram_config(ahc, /*enable*/TRUE, pcheck, fast, large);
        num_scbs = ahc_probe_scbs(ahc);
        if (num_scbs == 0) {
                /* The SRAM wasn't really present. */
                goto done;
        }
        enable = TRUE;

        /*
         * Clear any outstanding parity error
         * and ensure that parity error reporting
         * is enabled.
         */
        ahc_outb(ahc, SEQCTL, 0);
        ahc_outb(ahc, CLRINT, CLRPARERR);
        ahc_outb(ahc, CLRINT, CLRBRKADRINT);

        /* Now see if we can do parity */
        ahc_scbram_config(ahc, enable, /*pcheck*/TRUE, fast, large);
        num_scbs = ahc_probe_scbs(ahc);
        if ((ahc_inb(ahc, INTSTAT) & BRKADRINT) == 0
         || (ahc_inb(ahc, ERROR) & MPARERR) == 0)
                pcheck = TRUE;

        /* Clear any resulting parity error */
        ahc_outb(ahc, CLRINT, CLRPARERR);
        ahc_outb(ahc, CLRINT, CLRBRKADRINT);

        /* Now see if we can do fast timing */
        ahc_scbram_config(ahc, enable, pcheck, /*fast*/TRUE, large);
        test_num_scbs = ahc_probe_scbs(ahc);
        if (test_num_scbs == num_scbs
         && ((ahc_inb(ahc, INTSTAT) & BRKADRINT) == 0
          || (ahc_inb(ahc, ERROR) & MPARERR) == 0))
                fast = TRUE;

        /*
         * See if we can use large SCBs and still maintain
         * the same overall count of SCBs.
         */
        if ((ahc->features & AHC_LARGE_SCBS) != 0) {
                ahc_scbram_config(ahc, enable, pcheck, fast, /*large*/TRUE);
                test_num_scbs = ahc_probe_scbs(ahc);
                if (test_num_scbs >= num_scbs) {
                        large = TRUE;
                        num_scbs = test_num_scbs;
                        if (num_scbs >= 64) {
                                /*
                                 * We have enough space to move the
                                 * "busy targets table" into SCB space
                                 * and make it qualify all the way to the
                                 * lun level.
                                 */
                                ahc->flags |= AHC_SCB_BTT;
                        }
                }
        }
done:
        /*
         * Disable parity error reporting until we
         * can load instruction ram.
         */
        ahc_outb(ahc, SEQCTL, PERRORDIS|FAILDIS);
        /* Clear any latched parity error */
        ahc_outb(ahc, CLRINT, CLRPARERR);
        ahc_outb(ahc, CLRINT, CLRBRKADRINT);
        if (bootverbose && enable) {
                printk("%s: External SRAM, %s access%s, %dbytes/SCB\n",
                       ahc_name(ahc), fast ? "fast" : "slow", 
                       pcheck ? ", parity checking enabled" : "",
                       large ? 64 : 32);
        }
        ahc_scbram_config(ahc, enable, pcheck, fast, large);
}

/*
 * Perform some simple tests that should catch situations where
 * our registers are invalidly mapped.
 */
int
ahc_pci_test_register_access(struct ahc_softc *ahc)
{
        int      error;
        u_int    status1;
        uint32_t cmd;
        uint8_t  hcntrl;

        error = EIO;

        /*
         * Enable PCI error interrupt status, but suppress NMIs
         * generated by SERR raised due to target aborts.
         */
        cmd = ahc_pci_read_config(ahc->dev_softc, PCIR_COMMAND, /*bytes*/2);
        ahc_pci_write_config(ahc->dev_softc, PCIR_COMMAND,
                             cmd & ~PCIM_CMD_SERRESPEN, /*bytes*/2);

        /*
         * First a simple test to see if any
         * registers can be read.  Reading
         * HCNTRL has no side effects and has
         * at least one bit that is guaranteed to
         * be zero so it is a good register to
         * use for this test.
         */
        hcntrl = ahc_inb(ahc, HCNTRL);

        if (hcntrl == 0xFF)
                goto fail;

        if ((hcntrl & CHIPRST) != 0) {
                /*
                 * The chip has not been initialized since
                 * PCI/EISA/VLB bus reset.  Don't trust
                 * "left over BIOS data".
                 */
                ahc->flags |= AHC_NO_BIOS_INIT;
        }

        /*
         * Next create a situation where write combining
         * or read prefetching could be initiated by the
         * CPU or host bridge.  Our device does not support
         * either, so look for data corruption and/or flagged
         * PCI errors.  First pause without causing another
         * chip reset.
         */
        hcntrl &= ~CHIPRST;
        ahc_outb(ahc, HCNTRL, hcntrl|PAUSE);
        while (ahc_is_paused(ahc) == 0)
                ;

        /* Clear any PCI errors that occurred before our driver attached. */
        status1 = ahc_pci_read_config(ahc->dev_softc,
                                      PCIR_STATUS + 1, /*bytes*/1);
        ahc_pci_write_config(ahc->dev_softc, PCIR_STATUS + 1,
                             status1, /*bytes*/1);
        ahc_outb(ahc, CLRINT, CLRPARERR);

        ahc_outb(ahc, SEQCTL, PERRORDIS);
        ahc_outb(ahc, SCBPTR, 0);
        ahc_outl(ahc, SCB_BASE, 0x5aa555aa);
        if (ahc_inl(ahc, SCB_BASE) != 0x5aa555aa)
                goto fail;

        status1 = ahc_pci_read_config(ahc->dev_softc,
                                      PCIR_STATUS + 1, /*bytes*/1);
        if ((status1 & STA) != 0)
                goto fail;

        error = 0;

fail:
        /* Silently clear any latched errors. */
        status1 = ahc_pci_read_config(ahc->dev_softc,
                                      PCIR_STATUS + 1, /*bytes*/1);
        ahc_pci_write_config(ahc->dev_softc, PCIR_STATUS + 1,
                             status1, /*bytes*/1);
        ahc_outb(ahc, CLRINT, CLRPARERR);
        ahc_outb(ahc, SEQCTL, PERRORDIS|FAILDIS);
        ahc_pci_write_config(ahc->dev_softc, PCIR_COMMAND, cmd, /*bytes*/2);
        return (error);
}

/*
 * Check the external port logic for a serial eeprom
 * and termination/cable detection contrls.
 */
static void
check_extport(struct ahc_softc *ahc, u_int *sxfrctl1)
{
        struct  seeprom_descriptor sd;
        struct  seeprom_config *sc;
        int     have_seeprom;
        int     have_autoterm;

        sd.sd_ahc = ahc;
        sd.sd_control_offset = SEECTL;          
        sd.sd_status_offset = SEECTL;           
        sd.sd_dataout_offset = SEECTL;          
        sc = ahc->seep_config;

        /*
         * For some multi-channel devices, the c46 is simply too
         * small to work.  For the other controller types, we can
         * get our information from either SEEPROM type.  Set the
         * type to start our probe with accordingly.
         */
        if (ahc->flags & AHC_LARGE_SEEPROM)
                sd.sd_chip = C56_66;
        else
                sd.sd_chip = C46;

        sd.sd_MS = SEEMS;
        sd.sd_RDY = SEERDY;
        sd.sd_CS = SEECS;
        sd.sd_CK = SEECK;
        sd.sd_DO = SEEDO;
        sd.sd_DI = SEEDI;

        have_seeprom = ahc_acquire_seeprom(ahc, &sd);
        if (have_seeprom) {

                if (bootverbose) 
                        printk("%s: Reading SEEPROM...", ahc_name(ahc));

                for (;;) {
                        u_int start_addr;

                        start_addr = 32 * (ahc->channel - 'A');

                        have_seeprom = ahc_read_seeprom(&sd, (uint16_t *)sc,
                                                        start_addr,
                                                        sizeof(*sc)/2);

                        if (have_seeprom)
                                have_seeprom = ahc_verify_cksum(sc);

                        if (have_seeprom != 0 || sd.sd_chip == C56_66) {
                                if (bootverbose) {
                                        if (have_seeprom == 0)
                                                printk ("checksum error\n");
                                        else
                                                printk ("done.\n");
                                }
                                break;
                        }
                        sd.sd_chip = C56_66;
                }
                ahc_release_seeprom(&sd);

                /* Remember the SEEPROM type for later */
                if (sd.sd_chip == C56_66)
                        ahc->flags |= AHC_LARGE_SEEPROM;
        }

        if (!have_seeprom) {
                /*
                 * Pull scratch ram settings and treat them as
                 * if they are the contents of an seeprom if
                 * the 'ADPT' signature is found in SCB2.
                 * We manually compose the data as 16bit values
                 * to avoid endian issues.
                 */
                ahc_outb(ahc, SCBPTR, 2);
                if (ahc_inb(ahc, SCB_BASE) == 'A'
                 && ahc_inb(ahc, SCB_BASE + 1) == 'D'
                 && ahc_inb(ahc, SCB_BASE + 2) == 'P'
                 && ahc_inb(ahc, SCB_BASE + 3) == 'T') {
                        uint16_t *sc_data;
                        int       i;

                        sc_data = (uint16_t *)sc;
                        for (i = 0; i < 32; i++, sc_data++) {
                                int     j;

                                j = i * 2;
                                *sc_data = ahc_inb(ahc, SRAM_BASE + j)
                                         | ahc_inb(ahc, SRAM_BASE + j + 1) << 8;
                        }
                        have_seeprom = ahc_verify_cksum(sc);
                        if (have_seeprom)
                                ahc->flags |= AHC_SCB_CONFIG_USED;
                }
                /*
                 * Clear any SCB parity errors in case this data and
                 * its associated parity was not initialized by the BIOS
                 */
                ahc_outb(ahc, CLRINT, CLRPARERR);
                ahc_outb(ahc, CLRINT, CLRBRKADRINT);
        }

        if (!have_seeprom) {
                if (bootverbose)
                        printk("%s: No SEEPROM available.\n", ahc_name(ahc));
                ahc->flags |= AHC_USEDEFAULTS;
                kfree(ahc->seep_config);
                ahc->seep_config = NULL;
                sc = NULL;
        } else {
                ahc_parse_pci_eeprom(ahc, sc);
        }

        /*
         * Cards that have the external logic necessary to talk to
         * a SEEPROM, are almost certain to have the remaining logic
         * necessary for auto-termination control.  This assumption
         * hasn't failed yet...
         */
        have_autoterm = have_seeprom;

        /*
         * Some low-cost chips have SEEPROM and auto-term control built
         * in, instead of using a GAL.  They can tell us directly
         * if the termination logic is enabled.
         */
        if ((ahc->features & AHC_SPIOCAP) != 0) {
                if ((ahc_inb(ahc, SPIOCAP) & SSPIOCPS) == 0)
                        have_autoterm = FALSE;
        }

        if (have_autoterm) {
                ahc->flags |= AHC_HAS_TERM_LOGIC;
                ahc_acquire_seeprom(ahc, &sd);
                configure_termination(ahc, &sd, sc->adapter_control, sxfrctl1);
                ahc_release_seeprom(&sd);
        } else if (have_seeprom) {
                *sxfrctl1 &= ~STPWEN;
                if ((sc->adapter_control & CFSTERM) != 0)
                        *sxfrctl1 |= STPWEN;
                if (bootverbose)
                        printk("%s: Low byte termination %sabled\n",
                               ahc_name(ahc),
                               (*sxfrctl1 & STPWEN) ? "en" : "dis");
        }
}

static void
ahc_parse_pci_eeprom(struct ahc_softc *ahc, struct seeprom_config *sc)
{
        /*
         * Put the data we've collected down into SRAM
         * where ahc_init will find it.
         */
        int      i;
        int      max_targ = sc->max_targets & CFMAXTARG;
        u_int    scsi_conf;
        uint16_t discenable;
        uint16_t ultraenb;

        discenable = 0;
        ultraenb = 0;
        if ((sc->adapter_control & CFULTRAEN) != 0) {
                /*
                 * Determine if this adapter has a "newstyle"
                 * SEEPROM format.
                 */
                for (i = 0; i < max_targ; i++) {
                        if ((sc->device_flags[i] & CFSYNCHISULTRA) != 0) {
                                ahc->flags |= AHC_NEWEEPROM_FMT;
                                break;
                        }
                }
        }

        for (i = 0; i < max_targ; i++) {
                u_int     scsirate;
                uint16_t target_mask;

                target_mask = 0x01 << i;
                if (sc->device_flags[i] & CFDISC)
                        discenable |= target_mask;
                if ((ahc->flags & AHC_NEWEEPROM_FMT) != 0) {
                        if ((sc->device_flags[i] & CFSYNCHISULTRA) != 0)
                                ultraenb |= target_mask;
                } else if ((sc->adapter_control & CFULTRAEN) != 0) {
                        ultraenb |= target_mask;
                }
                if ((sc->device_flags[i] & CFXFER) == 0x04
                 && (ultraenb & target_mask) != 0) {
                        /* Treat 10MHz as a non-ultra speed */
                        sc->device_flags[i] &= ~CFXFER;
                        ultraenb &= ~target_mask;
                }
                if ((ahc->features & AHC_ULTRA2) != 0) {
                        u_int offset;

                        if (sc->device_flags[i] & CFSYNCH)
                                offset = MAX_OFFSET_ULTRA2;
                        else 
                                offset = 0;
                        ahc_outb(ahc, TARG_OFFSET + i, offset);

                        /*
                         * The ultra enable bits contain the
                         * high bit of the ultra2 sync rate
                         * field.
                         */
                        scsirate = (sc->device_flags[i] & CFXFER)
                                 | ((ultraenb & target_mask) ? 0x8 : 0x0);
                        if (sc->device_flags[i] & CFWIDEB)
                                scsirate |= WIDEXFER;
                } else {
                        scsirate = (sc->device_flags[i] & CFXFER) << 4;
                        if (sc->device_flags[i] & CFSYNCH)
                                scsirate |= SOFS;
                        if (sc->device_flags[i] & CFWIDEB)
                                scsirate |= WIDEXFER;
                }
                ahc_outb(ahc, TARG_SCSIRATE + i, scsirate);
        }
        ahc->our_id = sc->brtime_id & CFSCSIID;

        scsi_conf = (ahc->our_id & 0x7);
        if (sc->adapter_control & CFSPARITY)
                scsi_conf |= ENSPCHK;
        if (sc->adapter_control & CFRESETB)
                scsi_conf |= RESET_SCSI;

        ahc->flags |= (sc->adapter_control & CFBOOTCHAN) >> CFBOOTCHANSHIFT;

        if (sc->bios_control & CFEXTEND)
                ahc->flags |= AHC_EXTENDED_TRANS_A;

        if (sc->bios_control & CFBIOSEN)
                ahc->flags |= AHC_BIOS_ENABLED;
        if (ahc->features & AHC_ULTRA
         && (ahc->flags & AHC_NEWEEPROM_FMT) == 0) {
                /* Should we enable Ultra mode? */
                if (!(sc->adapter_control & CFULTRAEN))
                        /* Treat us as a non-ultra card */
                        ultraenb = 0;
        }

        if (sc->signature == CFSIGNATURE
         || sc->signature == CFSIGNATURE2) {
                uint32_t devconfig;

                /* Honor the STPWLEVEL settings */
                devconfig = ahc_pci_read_config(ahc->dev_softc,
                                                DEVCONFIG, /*bytes*/4);
                devconfig &= ~STPWLEVEL;
                if ((sc->bios_control & CFSTPWLEVEL) != 0)
                        devconfig |= STPWLEVEL;
                ahc_pci_write_config(ahc->dev_softc, DEVCONFIG,
                                     devconfig, /*bytes*/4);
        }
        /* Set SCSICONF info */
        ahc_outb(ahc, SCSICONF, scsi_conf);
        ahc_outb(ahc, DISC_DSB, ~(discenable & 0xff));
        ahc_outb(ahc, DISC_DSB + 1, ~((discenable >> 8) & 0xff));
        ahc_outb(ahc, ULTRA_ENB, ultraenb & 0xff);
        ahc_outb(ahc, ULTRA_ENB + 1, (ultraenb >> 8) & 0xff);
}

static void
configure_termination(struct ahc_softc *ahc,
                      struct seeprom_descriptor *sd,
                      u_int adapter_control,
                      u_int *sxfrctl1)
{
        uint8_t brddat;
        
        brddat = 0;

        /*
         * Update the settings in sxfrctl1 to match the
         * termination settings 
         */
        *sxfrctl1 = 0;
        
        /*
         * SEECS must be on for the GALS to latch
         * the data properly.  Be sure to leave MS
         * on or we will release the seeprom.
         */
        SEEPROM_OUTB(sd, sd->sd_MS | sd->sd_CS);
        if ((adapter_control & CFAUTOTERM) != 0
         || (ahc->features & AHC_NEW_TERMCTL) != 0) {
                int internal50_present;
                int internal68_present;
                int externalcable_present;
                int eeprom_present;
                int enableSEC_low;
                int enableSEC_high;
                int enablePRI_low;
                int enablePRI_high;
                int sum;

                enableSEC_low = 0;
                enableSEC_high = 0;
                enablePRI_low = 0;
                enablePRI_high = 0;
                if ((ahc->features & AHC_NEW_TERMCTL) != 0) {
                        ahc_new_term_detect(ahc, &enableSEC_low,
                                            &enableSEC_high,
                                            &enablePRI_low,
                                            &enablePRI_high,
                                            &eeprom_present);
                        if ((adapter_control & CFSEAUTOTERM) == 0) {
                                if (bootverbose)
                                        printk("%s: Manual SE Termination\n",
                                               ahc_name(ahc));
                                enableSEC_low = (adapter_control & CFSELOWTERM);
                                enableSEC_high =
                                    (adapter_control & CFSEHIGHTERM);
                        }
                        if ((adapter_control & CFAUTOTERM) == 0) {
                                if (bootverbose)
                                        printk("%s: Manual LVD Termination\n",
                                               ahc_name(ahc));
                                enablePRI_low = (adapter_control & CFSTERM);
                                enablePRI_high = (adapter_control & CFWSTERM);
                        }
                        /* Make the table calculations below happy */
                        internal50_present = 0;
                        internal68_present = 1;
                        externalcable_present = 1;
                } else if ((ahc->features & AHC_SPIOCAP) != 0) {
                        aic785X_cable_detect(ahc, &internal50_present,
                                             &externalcable_present,
                                             &eeprom_present);
                        /* Can never support a wide connector. */
                        internal68_present = 0;
                } else {
                        aic787X_cable_detect(ahc, &internal50_present,
                                             &internal68_present,
                                             &externalcable_present,
                                             &eeprom_present);
                }

                if ((ahc->features & AHC_WIDE) == 0)
                        internal68_present = 0;

                if (bootverbose
                 && (ahc->features & AHC_ULTRA2) == 0) {
                        printk("%s: internal 50 cable %s present",
                               ahc_name(ahc),
                               internal50_present ? "is":"not");

                        if ((ahc->features & AHC_WIDE) != 0)
                                printk(", internal 68 cable %s present",
                                       internal68_present ? "is":"not");
                        printk("\n%s: external cable %s present\n",
                               ahc_name(ahc),
                               externalcable_present ? "is":"not");
                }
                if (bootverbose)
                        printk("%s: BIOS eeprom %s present\n",
                               ahc_name(ahc), eeprom_present ? "is" : "not");

                if ((ahc->flags & AHC_INT50_SPEEDFLEX) != 0) {
                        /*
                         * The 50 pin connector is a separate bus,
                         * so force it to always be terminated.
                         * In the future, perform current sensing
                         * to determine if we are in the middle of
                         * a properly terminated bus.
                         */
                        internal50_present = 0;
                }

                /*
                 * Now set the termination based on what
                 * we found.
                 * Flash Enable = BRDDAT7
                 * Secondary High Term Enable = BRDDAT6
                 * Secondary Low Term Enable = BRDDAT5 (7890)
                 * Primary High Term Enable = BRDDAT4 (7890)
                 */
                if ((ahc->features & AHC_ULTRA2) == 0
                 && (internal50_present != 0)
                 && (internal68_present != 0)
                 && (externalcable_present != 0)) {
                        printk("%s: Illegal cable configuration!!. "
                               "Only two connectors on the "
                               "adapter may be used at a "
                               "time!\n", ahc_name(ahc));

                        /*
                         * Pretend there are no cables in the hope
                         * that having all of the termination on
                         * gives us a more stable bus.
                         */
                        internal50_present = 0;
                        internal68_present = 0;
                        externalcable_present = 0;
                }

                if ((ahc->features & AHC_WIDE) != 0
                 && ((externalcable_present == 0)
                  || (internal68_present == 0)
                  || (enableSEC_high != 0))) {
                        brddat |= BRDDAT6;
                        if (bootverbose) {
                                if ((ahc->flags & AHC_INT50_SPEEDFLEX) != 0)
                                        printk("%s: 68 pin termination "
                                               "Enabled\n", ahc_name(ahc));
                                else
                                        printk("%s: %sHigh byte termination "
                                               "Enabled\n", ahc_name(ahc),
                                               enableSEC_high ? "Secondary "
                                                              : "");
                        }
                }

                sum = internal50_present + internal68_present
                    + externalcable_present;
                if (sum < 2 || (enableSEC_low != 0)) {
                        if ((ahc->features & AHC_ULTRA2) != 0)
                                brddat |= BRDDAT5;
                        else
                                *sxfrctl1 |= STPWEN;
                        if (bootverbose) {
                                if ((ahc->flags & AHC_INT50_SPEEDFLEX) != 0)
                                        printk("%s: 50 pin termination "
                                               "Enabled\n", ahc_name(ahc));
                                else
                                        printk("%s: %sLow byte termination "
                                               "Enabled\n", ahc_name(ahc),
                                               enableSEC_low ? "Secondary "
                                                             : "");
                        }
                }

                if (enablePRI_low != 0) {
                        *sxfrctl1 |= STPWEN;
                        if (bootverbose)
                                printk("%s: Primary Low Byte termination "
                                       "Enabled\n", ahc_name(ahc));
                }

                /*
                 * Setup STPWEN before setting up the rest of
                 * the termination per the tech note on the U160 cards.
                 */
                ahc_outb(ahc, SXFRCTL1, *sxfrctl1);

                if (enablePRI_high != 0) {
                        brddat |= BRDDAT4;
                        if (bootverbose)
                                printk("%s: Primary High Byte "
                                       "termination Enabled\n",
                                       ahc_name(ahc));
                }
                
                write_brdctl(ahc, brddat);

        } else {
                if ((adapter_control & CFSTERM) != 0) {
                        *sxfrctl1 |= STPWEN;

                        if (bootverbose)
                                printk("%s: %sLow byte termination Enabled\n",
                                       ahc_name(ahc),
                                       (ahc->features & AHC_ULTRA2) ? "Primary "
                                                                    : "");
                }

                if ((adapter_control & CFWSTERM) != 0
                 && (ahc->features & AHC_WIDE) != 0) {
                        brddat |= BRDDAT6;
                        if (bootverbose)
                                printk("%s: %sHigh byte termination Enabled\n",
                                       ahc_name(ahc),
                                       (ahc->features & AHC_ULTRA2)
                                     ? "Secondary " : "");
                }

                /*
                 * Setup STPWEN before setting up the rest of
                 * the termination per the tech note on the U160 cards.
                 */
                ahc_outb(ahc, SXFRCTL1, *sxfrctl1);

                if ((ahc->features & AHC_WIDE) != 0)
                        write_brdctl(ahc, brddat);
        }
        SEEPROM_OUTB(sd, sd->sd_MS); /* Clear CS */
}

static void
ahc_new_term_detect(struct ahc_softc *ahc, int *enableSEC_low,
                    int *enableSEC_high, int *enablePRI_low,
                    int *enablePRI_high, int *eeprom_present)
{
        uint8_t brdctl;

        /*
         * BRDDAT7 = Eeprom
         * BRDDAT6 = Enable Secondary High Byte termination
         * BRDDAT5 = Enable Secondary Low Byte termination
         * BRDDAT4 = Enable Primary high byte termination
         * BRDDAT3 = Enable Primary low byte termination
         */
        brdctl = read_brdctl(ahc);
        *eeprom_present = brdctl & BRDDAT7;
        *enableSEC_high = (brdctl & BRDDAT6);
        *enableSEC_low = (brdctl & BRDDAT5);
        *enablePRI_high = (brdctl & BRDDAT4);
        *enablePRI_low = (brdctl & BRDDAT3);
}

static void
aic787X_cable_detect(struct ahc_softc *ahc, int *internal50_present,
                     int *internal68_present, int *externalcable_present,
                     int *eeprom_present)
{
        uint8_t brdctl;

        /*
         * First read the status of our cables.
         * Set the rom bank to 0 since the
         * bank setting serves as a multiplexor
         * for the cable detection logic.
         * BRDDAT5 controls the bank switch.
         */
        write_brdctl(ahc, 0);

        /*
         * Now read the state of the internal
         * connectors.  BRDDAT6 is INT50 and
         * BRDDAT7 is INT68.
         */
        brdctl = read_brdctl(ahc);
        *internal50_present = (brdctl & BRDDAT6) ? 0 : 1;
        *internal68_present = (brdctl & BRDDAT7) ? 0 : 1;

        /*
         * Set the rom bank to 1 and determine
         * the other signals.
         */
        write_brdctl(ahc, BRDDAT5);

        /*
         * Now read the state of the external
         * connectors.  BRDDAT6 is EXT68 and
         * BRDDAT7 is EPROMPS.
         */
        brdctl = read_brdctl(ahc);
        *externalcable_present = (brdctl & BRDDAT6) ? 0 : 1;
        *eeprom_present = (brdctl & BRDDAT7) ? 1 : 0;
}

static void
aic785X_cable_detect(struct ahc_softc *ahc, int *internal50_present,
                     int *externalcable_present, int *eeprom_present)
{
        uint8_t brdctl;
        uint8_t spiocap;

        spiocap = ahc_inb(ahc, SPIOCAP);
        spiocap &= ~SOFTCMDEN;
        spiocap |= EXT_BRDCTL;
        ahc_outb(ahc, SPIOCAP, spiocap);
        ahc_outb(ahc, BRDCTL, BRDRW|BRDCS);
        ahc_flush_device_writes(ahc);
        ahc_delay(500);
        ahc_outb(ahc, BRDCTL, 0);
        ahc_flush_device_writes(ahc);
        ahc_delay(500);
        brdctl = ahc_inb(ahc, BRDCTL);
        *internal50_present = (brdctl & BRDDAT5) ? 0 : 1;
        *externalcable_present = (brdctl & BRDDAT6) ? 0 : 1;
        *eeprom_present = (ahc_inb(ahc, SPIOCAP) & EEPROM) ? 1 : 0;
}
        
int
ahc_acquire_seeprom(struct ahc_softc *ahc, struct seeprom_descriptor *sd)
{
        int wait;

        if ((ahc->features & AHC_SPIOCAP) != 0
         && (ahc_inb(ahc, SPIOCAP) & SEEPROM) == 0)
                return (0);

        /*
         * Request access of the memory port.  When access is
         * granted, SEERDY will go high.  We use a 1 second
         * timeout which should be near 1 second more than
         * is needed.  Reason: after the chip reset, there
         * should be no contention.
         */
        SEEPROM_OUTB(sd, sd->sd_MS);
        wait = 1000;  /* 1 second timeout in msec */
        while (--wait && ((SEEPROM_STATUS_INB(sd) & sd->sd_RDY) == 0)) {
                ahc_delay(1000);  /* delay 1 msec */
        }
        if ((SEEPROM_STATUS_INB(sd) & sd->sd_RDY) == 0) {
                SEEPROM_OUTB(sd, 0); 
                return (0);
        }
        return(1);
}

void
ahc_release_seeprom(struct seeprom_descriptor *sd)
{
        /* Release access to the memory port and the serial EEPROM. */
        SEEPROM_OUTB(sd, 0);
}

static void
write_brdctl(struct ahc_softc *ahc, uint8_t value)
{
        uint8_t brdctl;

        if ((ahc->chip & AHC_CHIPID_MASK) == AHC_AIC7895) {
                brdctl = BRDSTB;
                if (ahc->channel == 'B')
                        brdctl |= BRDCS;
        } else if ((ahc->features & AHC_ULTRA2) != 0) {
                brdctl = 0;
        } else {
                brdctl = BRDSTB|BRDCS;
        }
        ahc_outb(ahc, BRDCTL, brdctl);
        ahc_flush_device_writes(ahc);
        brdctl |= value;
        ahc_outb(ahc, BRDCTL, brdctl);
        ahc_flush_device_writes(ahc);
        if ((ahc->features & AHC_ULTRA2) != 0)
                brdctl |= BRDSTB_ULTRA2;
        else
                brdctl &= ~BRDSTB;
        ahc_outb(ahc, BRDCTL, brdctl);
        ahc_flush_device_writes(ahc);
        if ((ahc->features & AHC_ULTRA2) != 0)
                brdctl = 0;
        else
                brdctl &= ~BRDCS;
        ahc_outb(ahc, BRDCTL, brdctl);
}

static uint8_t
read_brdctl(struct ahc_softc *ahc)
{
        uint8_t brdctl;
        uint8_t value;

        if ((ahc->chip & AHC_CHIPID_MASK) == AHC_AIC7895) {
                brdctl = BRDRW;
                if (ahc->channel == 'B')
                        brdctl |= BRDCS;
        } else if ((ahc->features & AHC_ULTRA2) != 0) {
                brdctl = BRDRW_ULTRA2;
        } else {
                brdctl = BRDRW|BRDCS;
        }
        ahc_outb(ahc, BRDCTL, brdctl);
        ahc_flush_device_writes(ahc);
        value = ahc_inb(ahc, BRDCTL);
        ahc_outb(ahc, BRDCTL, 0);
        return (value);
}

static void
ahc_pci_intr(struct ahc_softc *ahc)
{
        u_int error;
        u_int status1;

        error = ahc_inb(ahc, ERROR);
        if ((error & PCIERRSTAT) == 0)
                return;

        status1 = ahc_pci_read_config(ahc->dev_softc,
                                      PCIR_STATUS + 1, /*bytes*/1);

        printk("%s: PCI error Interrupt at seqaddr = 0x%x\n",
              ahc_name(ahc),
              ahc_inb(ahc, SEQADDR0) | (ahc_inb(ahc, SEQADDR1) << 8));

        if (status1 & DPE) {
                ahc->pci_target_perr_count++;
                printk("%s: Data Parity Error Detected during address "
                       "or write data phase\n", ahc_name(ahc));
        }
        if (status1 & SSE) {
                printk("%s: Signal System Error Detected\n", ahc_name(ahc));
        }
        if (status1 & RMA) {
                printk("%s: Received a Master Abort\n", ahc_name(ahc));
        }
        if (status1 & RTA) {
                printk("%s: Received a Target Abort\n", ahc_name(ahc));
        }
        if (status1 & STA) {
                printk("%s: Signaled a Target Abort\n", ahc_name(ahc));
        }
        if (status1 & DPR) {
                printk("%s: Data Parity Error has been reported via PERR#\n",
                       ahc_name(ahc));
        }

        /* Clear latched errors. */
        ahc_pci_write_config(ahc->dev_softc, PCIR_STATUS + 1,
                             status1, /*bytes*/1);

        if ((status1 & (DPE|SSE|RMA|RTA|STA|DPR)) == 0) {
                printk("%s: Latched PCIERR interrupt with "
                       "no status bits set\n", ahc_name(ahc)); 
        } else {
                ahc_outb(ahc, CLRINT, CLRPARERR);
        }

        if (ahc->pci_target_perr_count > AHC_PCI_TARGET_PERR_THRESH) {
                printk(
"%s: WARNING WARNING WARNING WARNING\n"
"%s: Too many PCI parity errors observed as a target.\n"
"%s: Some device on this bus is generating bad parity.\n"
"%s: This is an error *observed by*, not *generated by*, this controller.\n"
"%s: PCI parity error checking has been disabled.\n"
"%s: WARNING WARNING WARNING WARNING\n",
                       ahc_name(ahc), ahc_name(ahc), ahc_name(ahc),
                       ahc_name(ahc), ahc_name(ahc), ahc_name(ahc));
                ahc->seqctl |= FAILDIS;
                ahc_outb(ahc, SEQCTL, ahc->seqctl);
        }
        ahc_unpause(ahc);
}

static int
ahc_pci_chip_init(struct ahc_softc *ahc)
{
        ahc_outb(ahc, DSCOMMAND0, ahc->bus_softc.pci_softc.dscommand0);
        ahc_outb(ahc, DSPCISTATUS, ahc->bus_softc.pci_softc.dspcistatus);
        if ((ahc->features & AHC_DT) != 0) {
                u_int sfunct;

                sfunct = ahc_inb(ahc, SFUNCT) & ~ALT_MODE;
                ahc_outb(ahc, SFUNCT, sfunct | ALT_MODE);
                ahc_outb(ahc, OPTIONMODE, ahc->bus_softc.pci_softc.optionmode);
                ahc_outw(ahc, TARGCRCCNT, ahc->bus_softc.pci_softc.targcrccnt);
                ahc_outb(ahc, SFUNCT, sfunct);
                ahc_outb(ahc, CRCCONTROL1,
                         ahc->bus_softc.pci_softc.crccontrol1);

        }
        if ((ahc->features & AHC_MULTI_FUNC) != 0)
                ahc_outb(ahc, SCBBADDR, ahc->bus_softc.pci_softc.scbbaddr);

        if ((ahc->features & AHC_ULTRA2) != 0)
                ahc_outb(ahc, DFF_THRSH, ahc->bus_softc.pci_softc.dff_thrsh);

        return (ahc_chip_init(ahc));
}

#ifdef CONFIG_PM
void
ahc_pci_resume(struct ahc_softc *ahc)
{
        /*
         * We assume that the OS has restored our register
         * mappings, etc.  Just update the config space registers
         * that the OS doesn't know about and rely on our chip
         * reset handler to handle the rest.
         */
        ahc_pci_write_config(ahc->dev_softc, DEVCONFIG,
                             ahc->bus_softc.pci_softc.devconfig, /*bytes*/4);
        ahc_pci_write_config(ahc->dev_softc, PCIR_COMMAND,
                             ahc->bus_softc.pci_softc.command, /*bytes*/1);
        ahc_pci_write_config(ahc->dev_softc, CSIZE_LATTIME,
                             ahc->bus_softc.pci_softc.csize_lattime, /*bytes*/1);
        if ((ahc->flags & AHC_HAS_TERM_LOGIC) != 0) {
                struct  seeprom_descriptor sd;
                u_int   sxfrctl1;

                sd.sd_ahc = ahc;
                sd.sd_control_offset = SEECTL;          
                sd.sd_status_offset = SEECTL;           
                sd.sd_dataout_offset = SEECTL;          

                ahc_acquire_seeprom(ahc, &sd);
                configure_termination(ahc, &sd,
                                      ahc->seep_config->adapter_control,
                                      &sxfrctl1);
                ahc_release_seeprom(&sd);
        }
}
#endif

static int
ahc_aic785X_setup(struct ahc_softc *ahc)
{
        ahc_dev_softc_t pci;
        uint8_t rev;

        pci = ahc->dev_softc;
        ahc->channel = 'A';
        ahc->chip = AHC_AIC7850;
        ahc->features = AHC_AIC7850_FE;
        ahc->bugs |= AHC_TMODE_WIDEODD_BUG|AHC_CACHETHEN_BUG|AHC_PCI_MWI_BUG;
        rev = ahc_pci_read_config(pci, PCIR_REVID, /*bytes*/1);
        if (rev >= 1)
                ahc->bugs |= AHC_PCI_2_1_RETRY_BUG;
        ahc->instruction_ram_size = 512;
        return (0);
}

static int
ahc_aic7860_setup(struct ahc_softc *ahc)
{
        ahc_dev_softc_t pci;
        uint8_t rev;

        pci = ahc->dev_softc;
        ahc->channel = 'A';
        ahc->chip = AHC_AIC7860;
        ahc->features = AHC_AIC7860_FE;
        ahc->bugs |= AHC_TMODE_WIDEODD_BUG|AHC_CACHETHEN_BUG|AHC_PCI_MWI_BUG;
        rev = ahc_pci_read_config(pci, PCIR_REVID, /*bytes*/1);
        if (rev >= 1)
                ahc->bugs |= AHC_PCI_2_1_RETRY_BUG;
        ahc->instruction_ram_size = 512;
        return (0);
}

static int
ahc_apa1480_setup(struct ahc_softc *ahc)
{
        int error;

        error = ahc_aic7860_setup(ahc);
        if (error != 0)
                return (error);
        ahc->features |= AHC_REMOVABLE;
        return (0);
}

static int
ahc_aic7870_setup(struct ahc_softc *ahc)
{

        ahc->channel = 'A';
        ahc->chip = AHC_AIC7870;
        ahc->features = AHC_AIC7870_FE;
        ahc->bugs |= AHC_TMODE_WIDEODD_BUG|AHC_CACHETHEN_BUG|AHC_PCI_MWI_BUG;
        ahc->instruction_ram_size = 512;
        return (0);
}

static int
ahc_aic7870h_setup(struct ahc_softc *ahc)
{
        int error = ahc_aic7870_setup(ahc);

        ahc->features |= AHC_HVD;

        return error;
}

static int
ahc_aha394X_setup(struct ahc_softc *ahc)
{
        int error;

        error = ahc_aic7870_setup(ahc);
        if (error == 0)
                error = ahc_aha394XX_setup(ahc);
        return (error);
}

static int
ahc_aha394Xh_setup(struct ahc_softc *ahc)
{
        int error = ahc_aha394X_setup(ahc);

        ahc->features |= AHC_HVD;

        return error;
}

static int
ahc_aha398X_setup(struct ahc_softc *ahc)
{
        int error;

        error = ahc_aic7870_setup(ahc);
        if (error == 0)
                error = ahc_aha398XX_setup(ahc);
        return (error);
}

static int
ahc_aha494X_setup(struct ahc_softc *ahc)
{
        int error;

        error = ahc_aic7870_setup(ahc);
        if (error == 0)
                error = ahc_aha494XX_setup(ahc);
        return (error);
}

static int
ahc_aha494Xh_setup(struct ahc_softc *ahc)
{
        int error = ahc_aha494X_setup(ahc);

        ahc->features |= AHC_HVD;

        return error;
}

static int
ahc_aic7880_setup(struct ahc_softc *ahc)
{
        ahc_dev_softc_t pci;
        uint8_t rev;

        pci = ahc->dev_softc;
        ahc->channel = 'A';
        ahc->chip = AHC_AIC7880;
        ahc->features = AHC_AIC7880_FE;
        ahc->bugs |= AHC_TMODE_WIDEODD_BUG;
        rev = ahc_pci_read_config(pci, PCIR_REVID, /*bytes*/1);
        if (rev >= 1) {
                ahc->bugs |= AHC_PCI_2_1_RETRY_BUG;
        } else {
                ahc->bugs |= AHC_CACHETHEN_BUG|AHC_PCI_MWI_BUG;
        }
        ahc->instruction_ram_size = 512;
        return (0);
}

static int
ahc_aic7880h_setup(struct ahc_softc *ahc)
{
        int error = ahc_aic7880_setup(ahc);

        ahc->features |= AHC_HVD;

        return error;
}


static int
ahc_aha2940Pro_setup(struct ahc_softc *ahc)
{

        ahc->flags |= AHC_INT50_SPEEDFLEX;
        return (ahc_aic7880_setup(ahc));
}

static int
ahc_aha394XU_setup(struct ahc_softc *ahc)
{
        int error;

        error = ahc_aic7880_setup(ahc);
        if (error == 0)
                error = ahc_aha394XX_setup(ahc);
        return (error);
}

static int
ahc_aha394XUh_setup(struct ahc_softc *ahc)
{
        int error = ahc_aha394XU_setup(ahc);

        ahc->features |= AHC_HVD;

        return error;
}

static int
ahc_aha398XU_setup(struct ahc_softc *ahc)
{
        int error;

        error = ahc_aic7880_setup(ahc);
        if (error == 0)
                error = ahc_aha398XX_setup(ahc);
        return (error);
}

static int
ahc_aic7890_setup(struct ahc_softc *ahc)
{
        ahc_dev_softc_t pci;
        uint8_t rev;

        pci = ahc->dev_softc;
        ahc->channel = 'A';
        ahc->chip = AHC_AIC7890;
        ahc->features = AHC_AIC7890_FE;
        ahc->flags |= AHC_NEWEEPROM_FMT;
        rev = ahc_pci_read_config(pci, PCIR_REVID, /*bytes*/1);
        if (rev == 0)
                ahc->bugs |= AHC_AUTOFLUSH_BUG|AHC_CACHETHEN_BUG;
        ahc->instruction_ram_size = 768;
        return (0);
}

static int
ahc_aic7892_setup(struct ahc_softc *ahc)
{

        ahc->channel = 'A';
        ahc->chip = AHC_AIC7892;
        ahc->features = AHC_AIC7892_FE;
        ahc->flags |= AHC_NEWEEPROM_FMT;
        ahc->bugs |= AHC_SCBCHAN_UPLOAD_BUG;
        ahc->instruction_ram_size = 1024;
        return (0);
}

static int
ahc_aic7895_setup(struct ahc_softc *ahc)
{
        ahc_dev_softc_t pci;
        uint8_t rev;

        pci = ahc->dev_softc;
        ahc->channel = ahc_get_pci_function(pci) == 1 ? 'B' : 'A';
        /*
         * The 'C' revision of the aic7895 has a few additional features.
         */
        rev = ahc_pci_read_config(pci, PCIR_REVID, /*bytes*/1);
        if (rev >= 4) {
                ahc->chip = AHC_AIC7895C;
                ahc->features = AHC_AIC7895C_FE;
        } else  {
                u_int command;

                ahc->chip = AHC_AIC7895;
                ahc->features = AHC_AIC7895_FE;

                /*
                 * The BIOS disables the use of MWI transactions
                 * since it does not have the MWI bug work around
                 * we have.  Disabling MWI reduces performance, so
                 * turn it on again.
                 */
                command = ahc_pci_read_config(pci, PCIR_COMMAND, /*bytes*/1);
                command |= PCIM_CMD_MWRICEN;
                ahc_pci_write_config(pci, PCIR_COMMAND, command, /*bytes*/1);
                ahc->bugs |= AHC_PCI_MWI_BUG;
        }
        /*
         * XXX Does CACHETHEN really not work???  What about PCI retry?
         * on C level chips.  Need to test, but for now, play it safe.
         */
        ahc->bugs |= AHC_TMODE_WIDEODD_BUG|AHC_PCI_2_1_RETRY_BUG
                  |  AHC_CACHETHEN_BUG;

#if 0
        uint32_t devconfig;

        /*
         * Cachesize must also be zero due to stray DAC
         * problem when sitting behind some bridges.
         */
        ahc_pci_write_config(pci, CSIZE_LATTIME, 0, /*bytes*/1);
        devconfig = ahc_pci_read_config(pci, DEVCONFIG, /*bytes*/1);
        devconfig |= MRDCEN;
        ahc_pci_write_config(pci, DEVCONFIG, devconfig, /*bytes*/1);
#endif
        ahc->flags |= AHC_NEWEEPROM_FMT;
        ahc->instruction_ram_size = 512;
        return (0);
}

static int
ahc_aic7895h_setup(struct ahc_softc *ahc)
{
        int error = ahc_aic7895_setup(ahc);

        ahc->features |= AHC_HVD;

        return error;
}

static int
ahc_aic7896_setup(struct ahc_softc *ahc)
{
        ahc_dev_softc_t pci;

        pci = ahc->dev_softc;
        ahc->channel = ahc_get_pci_function(pci) == 1 ? 'B' : 'A';
        ahc->chip = AHC_AIC7896;
        ahc->features = AHC_AIC7896_FE;
        ahc->flags |= AHC_NEWEEPROM_FMT;
        ahc->bugs |= AHC_CACHETHEN_DIS_BUG;
        ahc->instruction_ram_size = 768;
        return (0);
}

static int
ahc_aic7899_setup(struct ahc_softc *ahc)
{
        ahc_dev_softc_t pci;

        pci = ahc->dev_softc;
        ahc->channel = ahc_get_pci_function(pci) == 1 ? 'B' : 'A';
        ahc->chip = AHC_AIC7899;
        ahc->features = AHC_AIC7899_FE;
        ahc->flags |= AHC_NEWEEPROM_FMT;
        ahc->bugs |= AHC_SCBCHAN_UPLOAD_BUG;
        ahc->instruction_ram_size = 1024;
        return (0);
}

static int
ahc_aha29160C_setup(struct ahc_softc *ahc)
{
        int error;

        error = ahc_aic7899_setup(ahc);
        if (error != 0)
                return (error);
        ahc->features |= AHC_REMOVABLE;
        return (0);
}

static int
ahc_raid_setup(struct ahc_softc *ahc)
{
        printk("RAID functionality unsupported\n");
        return (ENXIO);
}

static int
ahc_aha394XX_setup(struct ahc_softc *ahc)
{
        ahc_dev_softc_t pci;

        pci = ahc->dev_softc;
        switch (ahc_get_pci_slot(pci)) {
        case AHC_394X_SLOT_CHANNEL_A:
                ahc->channel = 'A';
                break;
        case AHC_394X_SLOT_CHANNEL_B:
                ahc->channel = 'B';
                break;
        default:
                printk("adapter at unexpected slot %d\n"
                       "unable to map to a channel\n",
                       ahc_get_pci_slot(pci));
                ahc->channel = 'A';
        }
        return (0);
}

static int
ahc_aha398XX_setup(struct ahc_softc *ahc)
{
        ahc_dev_softc_t pci;

        pci = ahc->dev_softc;
        switch (ahc_get_pci_slot(pci)) {
        case AHC_398X_SLOT_CHANNEL_A:
                ahc->channel = 'A';
                break;
        case AHC_398X_SLOT_CHANNEL_B:
                ahc->channel = 'B';
                break;
        case AHC_398X_SLOT_CHANNEL_C:
                ahc->channel = 'C';
                break;
        default:
                printk("adapter at unexpected slot %d\n"
                       "unable to map to a channel\n",
                       ahc_get_pci_slot(pci));
                ahc->channel = 'A';
                break;
        }
        ahc->flags |= AHC_LARGE_SEEPROM;
        return (0);
}

static int
ahc_aha494XX_setup(struct ahc_softc *ahc)
{
        ahc_dev_softc_t pci;

        pci = ahc->dev_softc;
        switch (ahc_get_pci_slot(pci)) {
        case AHC_494X_SLOT_CHANNEL_A:
                ahc->channel = 'A';
                break;
        case AHC_494X_SLOT_CHANNEL_B:
                ahc->channel = 'B';
                break;
        case AHC_494X_SLOT_CHANNEL_C:
                ahc->channel = 'C';
                break;
        case AHC_494X_SLOT_CHANNEL_D:
                ahc->channel = 'D';
                break;
        default:
                printk("adapter at unexpected slot %d\n"
                       "unable to map to a channel\n",
                       ahc_get_pci_slot(pci));
                ahc->channel = 'A';
        }
        ahc->flags |= AHC_LARGE_SEEPROM;
        return (0);
}