ip22-hpc.c

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/*
 * ip22-hpc.c: Routines for generic manipulation of the HPC controllers.
 *
 * Copyright (C) 1996 David S. Miller ([email protected])
 * Copyright (C) 1998 Ralf Baechle
 */

#include <linux/init.h>
#include <linux/module.h>
#include <linux/types.h>

#include <asm/io.h>
#include <asm/sgi/hpc3.h>
#include <asm/sgi/ioc.h>
#include <asm/sgi/ip22.h>

struct hpc3_regs *hpc3c0, *hpc3c1;

EXPORT_SYMBOL(hpc3c0);
EXPORT_SYMBOL(hpc3c1);

struct sgioc_regs *sgioc;

EXPORT_SYMBOL(sgioc);

/* We need software copies of these because they are write only. */
u8 sgi_ioc_reset, sgi_ioc_write;

extern char *system_type;

void __init sgihpc_init(void)
{
    /* ioremap can't fail */
    hpc3c0 = (struct hpc3_regs *)
         ioremap(HPC3_CHIP0_BASE, sizeof(struct hpc3_regs));
    hpc3c1 = (struct hpc3_regs *)
         ioremap(HPC3_CHIP1_BASE, sizeof(struct hpc3_regs));
    /* IOC lives in PBUS PIO channel 6 */
    sgioc = (struct sgioc_regs *)hpc3c0->pbus_extregs[6];

    hpc3c0->pbus_piocfg[6][0] |= HPC3_PIOCFG_DS16;
    if (ip22_is_fullhouse()) {
        /* Full House comes with INT2 which lives in PBUS PIO
         * channel 4 */
        sgint = (struct sgint_regs *)hpc3c0->pbus_extregs[4];
        system_type = "SGI Indigo2";
    } else {
        /* Guiness comes with INT3 which is part of IOC */
        sgint = &sgioc->int3;
        system_type = "SGI Indy";
    }

    sgi_ioc_reset = (SGIOC_RESET_PPORT | SGIOC_RESET_KBDMOUSE |
             SGIOC_RESET_EISA | SGIOC_RESET_ISDN |
             SGIOC_RESET_LC0OFF);

    sgi_ioc_write = (SGIOC_WRITE_EASEL | SGIOC_WRITE_NTHRESH |
             SGIOC_WRITE_TPSPEED | SGIOC_WRITE_EPSEL |
             SGIOC_WRITE_U0AMODE | SGIOC_WRITE_U1AMODE);

    sgioc->reset = sgi_ioc_reset;
    sgioc->write = sgi_ioc_write;
}