HAMMER 60I/Many: Mirroring

[dragonfly.git] / sys / dev / netif / sr / if_sr_isa.c

/*
 * Copyright (c) 1996 - 2001 John Hay.
 * Copyright (c) 1996 SDL Communications, 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.
 * 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.
 * 3. Neither the name of the author nor the names of any co-contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 * $FreeBSD: src/sys/dev/sr/if_sr_isa.c,v 1.46.2.1 2002/06/17 15:10:58 jhay Exp $
 * $DragonFly: src/sys/dev/netif/sr/if_sr_isa.c,v 1.6 2006/12/22 23:26:22 swildner Exp $
 */

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/conf.h>           /* cdevsw stuff */
#include <sys/kernel.h>         /* SYSINIT stuff */
#include <sys/uio.h>            /* SYSINIT stuff */
#include <sys/malloc.h>         /* malloc region definitions */
#include <sys/module.h>
#include <sys/bus.h>
#include <sys/rman.h>
#include <sys/time.h>

#include <bus/isa/isavar.h>
#include "isa_if.h"

#include "../ic_layer/hd64570.h"
#include "if_srregs.h"

/*
 * List of valid interrupt numbers for the N2 ISA card.
 */
static int sr_irqtable[16] = {
        0,      /*  0 */
        0,      /*  1 */
        0,      /*  2 */
        1,      /*  3 */
        1,      /*  4 */
        1,      /*  5 */
        0,      /*  6 */
        1,      /*  7 */
        0,      /*  8 */
        0,      /*  9 */
        1,      /* 10 */
        1,      /* 11 */
        1,      /* 12 */
        0,      /* 13 */
        0,      /* 14 */
        1       /* 15 */
};

static int sr_isa_probe (device_t);
static int sr_isa_attach (device_t);

static struct isa_pnp_id sr_ids[] = {
        {0,             NULL}
};

static device_method_t sr_methods[] = {
        DEVMETHOD(device_probe,         sr_isa_probe),
        DEVMETHOD(device_attach,        sr_isa_attach),
        DEVMETHOD(device_detach,        sr_detach),
        { 0, 0 }
};

static driver_t sr_isa_driver = {
        "sr",
        sr_methods,
        sizeof (struct sr_hardc)
};

DRIVER_MODULE(if_sr, isa, sr_isa_driver, sr_devclass, 0, 0);

static u_int    src_get8_io(u_int base, u_int off);
static u_int    src_get16_io(u_int base, u_int off);
static void     src_put8_io(u_int base, u_int off, u_int val);
static void     src_put16_io(u_int base, u_int off, u_int val);
static u_int    src_dpram_size(device_t device);

/*
 * Probe for an ISA card. If it is there, size its memory. Then get the
 * rest of its information and fill it in.
 */
static int
sr_isa_probe (device_t device)
{
        struct sr_hardc *hc;
        int error;
        u_int32_t flags;
        u_int i, tmp;
        u_short port;
        u_long irq, junk, membase, memsize, port_start, port_count;
        sca_regs *sca = 0;

        error = ISA_PNP_PROBE(device_get_parent(device), device, sr_ids);
        if (error == ENXIO || error == 0)
                return (error);

        hc = device_get_softc(device);

        if (sr_allocate_ioport(device, 0, SRC_IO_SIZ)) {
                return (ENXIO);
        }

        /*
         * Now see if the card is realy there.
         */
        error = bus_get_resource(device, SYS_RES_IOPORT, 0, &port_start,
            &port_count);
        port = port_start;

        hc->cardtype = SR_CRD_N2;
        hc->cunit = device_get_unit(device);
        hc->iobase = port_start;
        /*
         * We have to fill these in early because the SRC_PUT* and SRC_GET*
         * macros use them.
         */
        hc->src_get8 = src_get8_io;
        hc->src_get16 = src_get16_io;
        hc->src_put8 = src_put8_io;
        hc->src_put16 = src_put16_io;

        hc->sca = 0;
        hc->numports = NCHAN;   /* assumed # of channels on the card */

        flags = device_get_flags(device);
        if (flags & SR_FLAGS_NCHAN_MSK)
                hc->numports = flags & SR_FLAGS_NCHAN_MSK;

        outb(port + SR_PCR, 0); /* turn off the card */

        /*
         * Next, we'll test the Base Address Register to retension of
         * data... ... seeing if we're *really* talking to an N2.
         */
        for (i = 0; i < 0x100; i++) {
                outb(port + SR_BAR, i);
                inb(port + SR_PCR);
                tmp = inb(port + SR_BAR);
                if (tmp != i) {
                        kprintf("sr%d: probe failed BAR %x, %x.\n",
                               hc->cunit, i, tmp);
                        goto errexit;
                }
        }

        /*
         * Now see if we can see the SCA.
         */
        outb(port + SR_PCR, SR_PCR_SCARUN | inb(port + SR_PCR));
        SRC_PUT8(port, sca->wcrl, 0);
        SRC_PUT8(port, sca->wcrm, 0);
        SRC_PUT8(port, sca->wcrh, 0);
        SRC_PUT8(port, sca->pcr, 0);
        SRC_PUT8(port, sca->msci[0].tmc, 0);
        inb(port);

        tmp = SRC_GET8(port, sca->msci[0].tmc);
        if (tmp != 0) {
                kprintf("sr%d: Error reading SCA 0, %x\n", hc->cunit, tmp);
                goto errexit;
        }
        SRC_PUT8(port, sca->msci[0].tmc, 0x5A);
        inb(port);

        tmp = SRC_GET8(port, sca->msci[0].tmc);
        if (tmp != 0x5A) {
                kprintf("sr%d: Error reading SCA 0x5A, %x\n", hc->cunit, tmp);
                goto errexit;
        }
        SRC_PUT16(port, sca->dmac[0].cda, 0);
        inb(port);

        tmp = SRC_GET16(port, sca->dmac[0].cda);
        if (tmp != 0) {
                kprintf("sr%d: Error reading SCA 0, %x\n", hc->cunit, tmp);
                goto errexit;
        }
        SRC_PUT16(port, sca->dmac[0].cda, 0x55AA);
        inb(port);

        tmp = SRC_GET16(port, sca->dmac[0].cda);
        if (tmp != 0x55AA) {
                kprintf("sr%d: Error reading SCA 0x55AA, %x\n",
                       hc->cunit, tmp);
                goto errexit;
        }

        membase = bus_get_resource_start(device, SYS_RES_MEMORY, 0);
        memsize = SRC_WIN_SIZ;
        if (bus_set_resource(device, SYS_RES_MEMORY, 0, membase, memsize))
                goto errexit;

        if (sr_allocate_memory(device, 0, SRC_WIN_SIZ))
                goto errexit;

        if (src_dpram_size(device) < 4)
                goto errexit;

        if (sr_allocate_irq(device, 0, 1))
                goto errexit;

        if (bus_get_resource(device, SYS_RES_IRQ, 0, &irq, &junk)) {
                goto errexit;
        }
        /*
         * Do a little sanity check.
         */
        if (sr_irqtable[irq] == 0)
                kprintf("sr%d: Warning: illegal interrupt %ld chosen.\n",
                       hc->cunit, irq);

        /*
         * Bogus card configuration
         */
        if ((hc->numports > NCHAN)      /* only 2 ports/card */
            ||(hc->memsize > (512 * 1024)))     /* no more than 256K */
                goto errexit;

        sr_deallocate_resources(device);
        return (0);

errexit:
        sr_deallocate_resources(device);
        return (ENXIO);
}

/*
 * srattach_isa and srattach_pci allocate memory for hardc, softc and
 * data buffers. It also does any initialization that is bus specific.
 * At the end they call the common srattach() function.
 */
static int
sr_isa_attach (device_t device)
{
        u_char mar;
        u_int32_t flags;
        struct sr_hardc *hc;

        hc = device_get_softc(device);
        bzero(hc, sizeof(struct sr_hardc));

        if (sr_allocate_ioport(device, 0, SRC_IO_SIZ))
                goto errexit;
        if (sr_allocate_memory(device, 0, SRC_WIN_SIZ))
                goto errexit;
        if (sr_allocate_irq(device, 0, 1))
                goto errexit;

        /*
         * We have to fill these in early because the SRC_PUT* and SRC_GET*
         * macros use them.
         */
        hc->src_get8 = src_get8_io;
        hc->src_get16 = src_get16_io;
        hc->src_put8 = src_put8_io;
        hc->src_put16 = src_put16_io;

        hc->cardtype = SR_CRD_N2;
        hc->cunit = device_get_unit(device);
        hc->sca = 0;
        hc->numports = NCHAN;   /* assumed # of channels on the card */
        flags = device_get_flags(device);
        if (flags & SR_FLAGS_NCHAN_MSK)
                hc->numports = flags & SR_FLAGS_NCHAN_MSK;

        hc->iobase = rman_get_start(hc->res_ioport);
        hc->sca_base = hc->iobase;
        hc->mem_start = (caddr_t)rman_get_virtual(hc->res_memory);
        hc->mem_end = hc->mem_start + SRC_WIN_SIZ;
        hc->mem_pstart = 0;
        hc->winmsk = SRC_WIN_MSK;

        hc->mempages = src_dpram_size(device);
        hc->memsize = hc->mempages * SRC_WIN_SIZ;

        outb(hc->iobase + SR_PCR, inb(hc->iobase + SR_PCR) | SR_PCR_SCARUN);
        outb(hc->iobase + SR_PSR, inb(hc->iobase + SR_PSR) | SR_PSR_EN_SCA_DMA);
        outb(hc->iobase + SR_MCR,
             SR_MCR_DTR0 | SR_MCR_DTR1 | SR_MCR_TE0 | SR_MCR_TE1);

        SRC_SET_ON(hc->iobase);

        /*
         * Configure the card. Mem address, irq,
         */
        mar = (rman_get_start(hc->res_memory) >> 16) & SR_PCR_16M_SEL;
        outb(hc->iobase + SR_PCR,
             mar | (inb(hc->iobase + SR_PCR) & ~SR_PCR_16M_SEL));
        mar = rman_get_start(hc->res_memory) >> 12;
        outb(hc->iobase + SR_BAR, mar);

        return sr_attach(device);

errexit:
        sr_deallocate_resources(device);
        return (ENXIO);
}

/*
 * I/O for ISA N2 card(s)
 */
#define SRC_REG(iobase,y)       ((((y) & 0xf) + (((y) & 0xf0) << 6) +       \
                                (iobase)) | 0x8000)

static u_int
src_get8_io(u_int base, u_int off)
{
        return inb(SRC_REG(base, off));
}

static u_int
src_get16_io(u_int base, u_int off)
{
        return inw(SRC_REG(base, off));
}

static void
src_put8_io(u_int base, u_int off, u_int val)
{
        outb(SRC_REG(base, off), val);
}

static void
src_put16_io(u_int base, u_int off, u_int val)
{
        outw(SRC_REG(base, off), val);
}

static u_int
src_dpram_size(device_t device)
{
        u_int pgs, i;
        u_short port;
        u_short *smem;
        u_char mar;
        u_long membase;
        struct sr_hardc *hc;

        hc = device_get_softc(device);
        port = hc->iobase;

        /*
         * OK, the board's interface registers seem to work. Now we'll see
         * if the Dual-Ported RAM is fully accessible...
         */
        outb(port + SR_PCR, SR_PCR_EN_VPM | SR_PCR_ISA16);
        outb(port + SR_PSR, SR_PSR_WIN_16K);

        /*
         * Take the kernel "virtual" address supplied to us and convert
         * it to a "real" address. Then program the card to use that.
         */
        membase = rman_get_start(hc->res_memory);
        mar = (membase >> 16) & SR_PCR_16M_SEL;
        outb(port + SR_PCR, mar | inb(port + SR_PCR));
        mar = membase >> 12;
        outb(port + SR_BAR, mar);
        outb(port + SR_PCR, inb(port + SR_PCR) | SR_PCR_MEM_WIN);
        smem = (u_short *)rman_get_virtual(hc->res_memory);/* DP RAM Address */
        /*
         * Here we will perform the memory scan to size the device.
         *
         * This is done by marking each potential page with a magic number.
         * We then loop through the pages looking for that magic number. As
         * soon as we no longer see that magic number, we'll quit the scan,
         * knowing that no more memory is present. This provides the number
         * of pages present on the card.
         *
         * Note: We're sizing 16K memory granules.
         */
        for (i = 0; i <= SR_PSR_PG_SEL; i++) {
                outb(port + SR_PSR,
                     (inb(port + SR_PSR) & ~SR_PSR_PG_SEL) | i);

                *smem = 0xAA55;
        }

        for (i = 0; i <= SR_PSR_PG_SEL; i++) {
                outb(port + SR_PSR,
                     (inb(port + SR_PSR) & ~SR_PSR_PG_SEL) | i);

                if (*smem != 0xAA55) {
                        /*
                         * If we have less than 64k of memory, give up. That
                         * is 4 x 16k pages.
                         */
                        if (i < 4) {
                                kprintf("sr%d: Bad mem page %d, mem %x, %x.\n",
                                       hc->cunit, i, 0xAA55, *smem);
                                return 0;
                        }
                        break;
                }
                *smem = i;
        }

        hc->mempages = i;
        hc->memsize = i * SRC_WIN_SIZ;
        hc->winmsk = SRC_WIN_MSK;
        pgs = i;                /* final count of 16K pages */

        /*
         * This next loop erases the contents of that page in DPRAM
         */
        for (i = 0; i <= pgs; i++) {
                outb(port + SR_PSR,
                     (inb(port + SR_PSR) & ~SR_PSR_PG_SEL) | i);
                bzero(smem, SRC_WIN_SIZ);
        }

        SRC_SET_OFF(port);
        return (pgs);
}