aic7770.c

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/*
 * Product specific probe and attach routines for:
 *  27/284X and aic7770 motherboard SCSI controllers
 *
 * Copyright (c) 1994-1998, 2000, 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.
 * 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/aic7770.c#32 $
 *
 * $FreeBSD$
 */

#ifdef __linux__
#include "aic7xxx_osm.h"
#include "aic7xxx_inline.h"
#include "aic7xxx_93cx6.h"
#else
#include <dev/aic7xxx/aic7xxx_osm.h>
#include <dev/aic7xxx/aic7xxx_inline.h>
#include <dev/aic7xxx/aic7xxx_93cx6.h>
#endif

#define ID_AIC7770  0x04907770
#define ID_AHA_274x 0x04907771
#define ID_AHA_284xB    0x04907756 /* BIOS enabled */
#define ID_AHA_284x 0x04907757 /* BIOS disabled*/
#define ID_OLV_274x 0x04907782 /* Olivetti OEM */
#define ID_OLV_274xD    0x04907783 /* Olivetti OEM (Differential) */

static int aic7770_chip_init(struct ahc_softc *ahc);
static int aha2840_load_seeprom(struct ahc_softc *ahc);
static ahc_device_setup_t ahc_aic7770_VL_setup;
static ahc_device_setup_t ahc_aic7770_EISA_setup;
static ahc_device_setup_t ahc_aic7770_setup;

struct aic7770_identity aic7770_ident_table[] =
{
    {
        ID_AHA_274x,
        0xFFFFFFFF,
        "Adaptec 274X SCSI adapter",
        ahc_aic7770_EISA_setup
    },
    {
        ID_AHA_284xB,
        0xFFFFFFFE,
        "Adaptec 284X SCSI adapter",
        ahc_aic7770_VL_setup
    },
    {
        ID_AHA_284x,
        0xFFFFFFFE,
        "Adaptec 284X SCSI adapter (BIOS Disabled)",
        ahc_aic7770_VL_setup
    },
    {
        ID_OLV_274x,
        0xFFFFFFFF,
        "Adaptec (Olivetti OEM) 274X SCSI adapter",
        ahc_aic7770_EISA_setup
    },
    {
        ID_OLV_274xD,
        0xFFFFFFFF,
        "Adaptec (Olivetti OEM) 274X Differential SCSI adapter",
        ahc_aic7770_EISA_setup
    },
    /* Generic chip probes for devices we don't know 'exactly' */
    {
        ID_AIC7770,
        0xFFFFFFFF,
        "Adaptec aic7770 SCSI adapter",
        ahc_aic7770_EISA_setup
    }
};
const int ahc_num_aic7770_devs = ARRAY_SIZE(aic7770_ident_table);

struct aic7770_identity *
aic7770_find_device(uint32_t id)
{
    struct  aic7770_identity *entry;
    int i;

    for (i = 0; i < ahc_num_aic7770_devs; i++) {
        entry = &aic7770_ident_table[i];
        if (entry->full_id == (id & entry->id_mask))
            return (entry);
    }
    return (NULL);
}

int
aic7770_config(struct ahc_softc *ahc, struct aic7770_identity *entry, u_int io)
{
    int error;
    int have_seeprom;
    u_int   hostconf;
    u_int   irq;
    u_int   intdef;

    error = entry->setup(ahc);
    have_seeprom = 0;
    if (error != 0)
        return (error);

    error = aic7770_map_registers(ahc, io);
    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);

    ahc->description = entry->name;
    error = ahc_softc_init(ahc);
    if (error != 0)
        return (error);

    ahc->bus_chip_init = aic7770_chip_init;

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

    /* Make sure we have a valid interrupt vector */
    intdef = ahc_inb(ahc, INTDEF);
    irq = intdef & VECTOR;
    switch (irq) {
    case 9:
    case 10:
    case 11:
    case 12:
    case 14:
    case 15:
        break;
    default:
        printk("aic7770_config: invalid irq setting %d\n", intdef);
        return (ENXIO);
    }

    if ((intdef & EDGE_TRIG) != 0)
        ahc->flags |= AHC_EDGE_INTERRUPT;

    switch (ahc->chip & (AHC_EISA|AHC_VL)) {
    case AHC_EISA:
    {
        u_int biosctrl;
        u_int scsiconf;
        u_int scsiconf1;

        biosctrl = ahc_inb(ahc, HA_274_BIOSCTRL);
        scsiconf = ahc_inb(ahc, SCSICONF);
        scsiconf1 = ahc_inb(ahc, SCSICONF + 1);

        /* Get the primary channel information */
        if ((biosctrl & CHANNEL_B_PRIMARY) != 0)
            ahc->flags |= 1;

        if ((biosctrl & BIOSMODE) == BIOSDISABLED) {
            ahc->flags |= AHC_USEDEFAULTS;
        } else {
            if ((ahc->features & AHC_WIDE) != 0) {
                ahc->our_id = scsiconf1 & HWSCSIID;
                if (scsiconf & TERM_ENB)
                    ahc->flags |= AHC_TERM_ENB_A;
            } else {
                ahc->our_id = scsiconf & HSCSIID;
                ahc->our_id_b = scsiconf1 & HSCSIID;
                if (scsiconf & TERM_ENB)
                    ahc->flags |= AHC_TERM_ENB_A;
                if (scsiconf1 & TERM_ENB)
                    ahc->flags |= AHC_TERM_ENB_B;
            }
        }
        if ((ahc_inb(ahc, HA_274_BIOSGLOBAL) & HA_274_EXTENDED_TRANS))
            ahc->flags |= AHC_EXTENDED_TRANS_A|AHC_EXTENDED_TRANS_B;
        break;
    }
    case AHC_VL:
    {
        have_seeprom = aha2840_load_seeprom(ahc);
        break;
    }
    default:
        break;
    }
    if (have_seeprom == 0) {
        kfree(ahc->seep_config);
        ahc->seep_config = NULL;
    }

    /*
     * Ensure autoflush is enabled
     */
    ahc_outb(ahc, SBLKCTL, ahc_inb(ahc, SBLKCTL) & ~AUTOFLUSHDIS);

    /* Setup the FIFO threshold and the bus off time */
    hostconf = ahc_inb(ahc, HOSTCONF);
    ahc_outb(ahc, BUSSPD, hostconf & DFTHRSH);
    ahc_outb(ahc, BUSTIME, (hostconf << 2) & BOFF);

    ahc->bus_softc.aic7770_softc.busspd = hostconf & DFTHRSH;
    ahc->bus_softc.aic7770_softc.bustime = (hostconf << 2) & BOFF;

    /*
     * Generic aic7xxx initialization.
     */
    error = ahc_init(ahc);
    if (error != 0)
        return (error);

    error = aic7770_map_int(ahc, irq);
    if (error != 0)
        return (error);

    ahc->init_level++;

    /*
     * Enable the board's BUS drivers
     */
    ahc_outb(ahc, BCTL, ENABLE);
    return (0);
}

static int
aic7770_chip_init(struct ahc_softc *ahc)
{
    ahc_outb(ahc, BUSSPD, ahc->bus_softc.aic7770_softc.busspd);
    ahc_outb(ahc, BUSTIME, ahc->bus_softc.aic7770_softc.bustime);
    ahc_outb(ahc, SBLKCTL, ahc_inb(ahc, SBLKCTL) & ~AUTOFLUSHDIS);
    ahc_outb(ahc, BCTL, ENABLE);
    return (ahc_chip_init(ahc));
}

/*
 * Read the 284x SEEPROM.
 */
static int
aha2840_load_seeprom(struct ahc_softc *ahc)
{
    struct  seeprom_descriptor sd;
    struct  seeprom_config *sc;
    int have_seeprom;
    uint8_t scsi_conf;

    sd.sd_ahc = ahc;
    sd.sd_control_offset = SEECTL_2840;
    sd.sd_status_offset = STATUS_2840;
    sd.sd_dataout_offset = STATUS_2840;     
    sd.sd_chip = C46;
    sd.sd_MS = 0;
    sd.sd_RDY = EEPROM_TF;
    sd.sd_CS = CS_2840;
    sd.sd_CK = CK_2840;
    sd.sd_DO = DO_2840;
    sd.sd_DI = DI_2840;
    sc = ahc->seep_config;

    if (bootverbose)
        printk("%s: Reading SEEPROM...", ahc_name(ahc));
    have_seeprom = ahc_read_seeprom(&sd, (uint16_t *)sc,
                    /*start_addr*/0, sizeof(*sc)/2);

    if (have_seeprom) {

        if (ahc_verify_cksum(sc) == 0) {
            if(bootverbose)
                printk ("checksum error\n");
            have_seeprom = 0;
        } else if (bootverbose) {
            printk("done.\n");
        }
    }

    if (!have_seeprom) {
        if (bootverbose)
            printk("%s: No SEEPROM available\n", ahc_name(ahc));
        ahc->flags |= AHC_USEDEFAULTS;
    } else {
        /*
         * Put the data we've collected down into SRAM
         * where ahc_init will find it.
         */
        int  i;
        int  max_targ;
        uint16_t discenable;

        max_targ = (ahc->features & AHC_WIDE) != 0 ? 16 : 8;
        discenable = 0;
        for (i = 0; i < max_targ; i++){
            uint8_t target_settings;

            target_settings = (sc->device_flags[i] & CFXFER) << 4;
            if (sc->device_flags[i] & CFSYNCH)
                target_settings |= SOFS;
            if (sc->device_flags[i] & CFWIDEB)
                target_settings |= WIDEXFER;
            if (sc->device_flags[i] & CFDISC)
                discenable |= (0x01 << i);
            ahc_outb(ahc, TARG_SCSIRATE + i, target_settings);
        }
        ahc_outb(ahc, DISC_DSB, ~(discenable & 0xff));
        ahc_outb(ahc, DISC_DSB + 1, ~((discenable >> 8) & 0xff));

        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;

        if (sc->bios_control & CF284XEXTEND)        
            ahc->flags |= AHC_EXTENDED_TRANS_A;
        /* Set SCSICONF info */
        ahc_outb(ahc, SCSICONF, scsi_conf);

        if (sc->adapter_control & CF284XSTERM)
            ahc->flags |= AHC_TERM_ENB_A;
    }
    return (have_seeprom);
}

static int
ahc_aic7770_VL_setup(struct ahc_softc *ahc)
{
    int error;

    error = ahc_aic7770_setup(ahc);
    ahc->chip |= AHC_VL;
    return (error);
}

static int
ahc_aic7770_EISA_setup(struct ahc_softc *ahc)
{
    int error;

    error = ahc_aic7770_setup(ahc);
    ahc->chip |= AHC_EISA;
    return (error);
}

static int
ahc_aic7770_setup(struct ahc_softc *ahc)
{
    ahc->channel = 'A';
    ahc->channel_b = 'B';
    ahc->chip = AHC_AIC7770;
    ahc->features = AHC_AIC7770_FE;
    ahc->bugs |= AHC_TMODE_WIDEODD_BUG;
    ahc->flags |= AHC_PAGESCBS;
    ahc->instruction_ram_size = 448;
    return (0);
}