/*      $NetBSD: if_ate_mca.c,v 1.21 2008/04/28 20:23:53 martin Exp $   */

/*-
* Copyright (c) 2001 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Jaromir Dolecek.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
*    notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
*    notice, this list of conditions and the following disclaimer in the
*    documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/

/*
* Driver for ATI AT1720X MCA cards based on Fujitsu MB8696xA controller.
*/

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: if_ate_mca.c,v 1.21 2008/04/28 20:23:53 martin Exp $");

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/device.h>
#include <sys/socket.h>
#include <sys/syslog.h>

#include <net/if.h>
#include <net/if_ether.h>
#include <net/if_media.h>

#include <sys/bus.h>
#include <sys/intr.h>

#include <dev/ic/mb86960reg.h>
#include <dev/ic/mb86960var.h>

#include <dev/mca/mcavar.h>
#include <dev/mca/mcadevs.h>

int     ate_mca_match(device_t, cfdata_t, void *);
void    ate_mca_attach(device_t, device_t, void *);
static void ate_mca_detect(bus_space_tag_t, bus_space_handle_t,
   uint8_t enaddr[ETHER_ADDR_LEN]);

#define ATE_NPORTS 0x20

struct ate_softc {
       struct  mb86960_softc sc_mb86960;       /* real "mb86960" softc */

       /* MCA-specific goo. */
       void    *sc_ih;                         /* interrupt cookie */
};

CFATTACH_DECL_NEW(ate_mca, sizeof(struct ate_softc),
   ate_mca_match, ate_mca_attach, NULL, NULL);

static const struct ate_mca_product {
       uint32_t        at_prodid;      /* MCA product ID */
       const char      *at_name;       /* device name */
       int             at_type;        /* device type */
} ate_mca_products[] = {
       { MCA_PRODUCT_AT1720T,  "ATI AT1720T",  FE_TYPE_AT1700T         },
       { MCA_PRODUCT_AT1720BT, "ATI AT1720BT", FE_TYPE_AT1700BT        },
       { MCA_PRODUCT_AT1720AT, "ATI AT1720AT", FE_TYPE_AT1700AT        },
       { MCA_PRODUCT_AT1720FT, "ATI AT1720FT", FE_TYPE_AT1700FT        },
       { 0,                    NULL,           0                       },
};

static const struct ate_mca_product *ate_mca_lookup(uint32_t);

static const struct ate_mca_product *
ate_mca_lookup(uint32_t id)
{
       const struct ate_mca_product *atp;

       for (atp = ate_mca_products; atp->at_name != NULL; atp++)
               if (id == atp->at_prodid)
                       return atp;

       return NULL;
}

int
ate_mca_match(device_t parent, cfdata_t cf, void *aux)
{
       struct mca_attach_args *ma = aux;

       if (ate_mca_lookup(ma->ma_id) != NULL)
               return 1;

       return 0;
}

/* see POS diagrams below for explanation of these arrays' contents */
static const int ats_iobase[] = {
       0x400, 0x2400, 0x4400, 0x6400, 0x1400, 0x3400, 0x5400, 0x7400
};
static const int ats_irq[] = {
       3, 4, 5, 9, 10, 11, 12, 15
};

void
ate_mca_attach(device_t parent, device_t self, void *aux)
{
       struct ate_softc *isc = device_private(self);
       struct mb86960_softc *sc = &isc->sc_mb86960;
       struct mca_attach_args *ma = aux;
       bus_space_tag_t iot = ma->ma_iot;
       bus_space_handle_t ioh;
       uint8_t myea[ETHER_ADDR_LEN];
       int pos3, pos4;
       int iobase, irq;
       const struct ate_mca_product *atp;

       sc->sc_dev = self;

       pos3 = mca_conf_read(ma->ma_mc, ma->ma_slot, 3);
       pos4 = mca_conf_read(ma->ma_mc, ma->ma_slot, 4);

       /*
        * POS register 2: (adf pos0)
        * 7 6 5 4 3 2 1 0
        *               \__ enable: 0=adapter disabled, 1=adapter enabled
        *
        * POS register 3: (adf pos1)
        *
        * 7 6 5 4 3 2 1 0
        * \_/ \___/ \___/
        *   \     \     \__ I/O Port Addresses: 000=0x400-0x4FF 100=0x1400-
        *    \     \          001=0x2400 101=0x3400 010=0x4400 110=0x5400
        *     \     \         011=0x6400 111=0x7400
        *      \     \_____ Boot ROM Memory Address
        *       \
        *        \_________ Lower 2 bit of Interrupt Request Number
        *
        * POS register 4: (adf pos2)
        *
        * 7 6 5 4 3 2 1 0
        *   \      \_______ Twisted Pair Type: 0=100 ohm, Unshielded
        *    \                1=150 ohm, Shielded
        *     \____________ Higher 1 bit of Interrupt Request Number:
        *                   000=3 001=4 010=5 011=9 100=10 101=11 110=12 111=15
        */

       atp = ate_mca_lookup(ma->ma_id);
#ifdef DIAGNOSTIC
       if (atp == NULL) {
               aprint_normal("\n");
               aprint_error_dev(sc->sc_dev, "where did the card go?\n");
               return;
       }
#endif

       iobase = ats_iobase[pos3 & 0x7];
       irq = ats_irq[((pos4 & 0x40) >> 4) | ((pos3 & 0xc0) >> 6)];

       aprint_normal(" slot %d irq %d: %s\n",
           ma->ma_slot + 1, irq, atp->at_name);

       /* Map i/o space. */
       if (bus_space_map(iot, iobase, ATE_NPORTS, 0, &ioh)) {
               aprint_error_dev(sc->sc_dev, "can't map i/o space\n");
               return;
       }

       sc->sc_bst = iot;
       sc->sc_bsh = ioh;

       /* Get ethernet address. */
       ate_mca_detect(iot, ioh, myea);

       /* This interface is always enabled. */
       sc->sc_stat |= FE_STAT_ENABLED;

       /*
        * Do generic MB86960 attach.
        */
       mb86960_attach(sc, myea);

       mb86960_config(sc, NULL, 0, 0);

       /* Establish the interrupt handler. */
       isc->sc_ih = mca_intr_establish(ma->ma_mc, irq, IPL_NET,
           mb86960_intr, sc);
       if (isc->sc_ih == NULL) {
               aprint_error_dev(sc->sc_dev,
                   "couldn't establish interrupt handler\n");
               return;
       }
}

/*
* Very simplified ate_detect() from dev/isa/if_ate.c, only
* to determine ethernet address.
*/
static void
ate_mca_detect(bus_space_tag_t iot, bus_space_handle_t ioh,
   uint8_t enaddr[ETHER_ADDR_LEN])
{
       uint8_t eeprom[FE_EEPROM_SIZE];

       /* Get our station address from EEPROM. */
       mb86965_read_eeprom(iot, ioh, eeprom);
       memcpy(enaddr, eeprom + FE_ATI_EEP_ADDR, ETHER_ADDR_LEN);
}

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