LXR linux/arch/mips/sgi-ip22/ip22-hpc.c

   1// SPDX-License-Identifier: GPL-2.0
   2/*
   3 * ip22-hpc.c: Routines for generic manipulation of the HPC controllers.
   4 *
   5 * Copyright (C) 1996 David S. Miller (davem@davemloft.net)
   6 * Copyright (C) 1998 Ralf Baechle
   7 */
   8
   9#include <linux/export.h>
  10#include <linux/init.h>
  11#include <linux/types.h>
  12
  13#include <asm/io.h>
  14#include <asm/sgi/hpc3.h>
  15#include <asm/sgi/ioc.h>
  16#include <asm/sgi/ip22.h>
  17
  18struct hpc3_regs *hpc3c0, *hpc3c1;
  19
  20EXPORT_SYMBOL(hpc3c0);
  21EXPORT_SYMBOL(hpc3c1);
  22
  23struct sgioc_regs *sgioc;
  24
  25EXPORT_SYMBOL(sgioc);
  26
  27/* We need software copies of these because they are write only. */
  28u8 sgi_ioc_reset, sgi_ioc_write;
  29
  30extern char *system_type;
  31
  32void __init sgihpc_init(void)
  33{
  34        /* ioremap can't fail */
  35        hpc3c0 = (struct hpc3_regs *)
  36                 ioremap(HPC3_CHIP0_BASE, sizeof(struct hpc3_regs));
  37        hpc3c1 = (struct hpc3_regs *)
  38                 ioremap(HPC3_CHIP1_BASE, sizeof(struct hpc3_regs));
  39        /* IOC lives in PBUS PIO channel 6 */
  40        sgioc = (struct sgioc_regs *)hpc3c0->pbus_extregs[6];
  41
  42        hpc3c0->pbus_piocfg[6][0] |= HPC3_PIOCFG_DS16;
  43        if (ip22_is_fullhouse()) {
  44                /* Full House comes with INT2 which lives in PBUS PIO
  45                 * channel 4 */
  46                sgint = (struct sgint_regs *)hpc3c0->pbus_extregs[4];
  47                system_type = "SGI Indigo2";
  48        } else {
  49                /* Guiness comes with INT3 which is part of IOC */
  50                sgint = &sgioc->int3;
  51                system_type = "SGI Indy";
  52        }
  53
  54        sgi_ioc_reset = (SGIOC_RESET_PPORT | SGIOC_RESET_KBDMOUSE |
  55                         SGIOC_RESET_EISA | SGIOC_RESET_ISDN |
  56                         SGIOC_RESET_LC0OFF);
  57
  58        sgi_ioc_write = (SGIOC_WRITE_EASEL | SGIOC_WRITE_NTHRESH |
  59                         SGIOC_WRITE_TPSPEED | SGIOC_WRITE_EPSEL |
  60                         SGIOC_WRITE_U0AMODE | SGIOC_WRITE_U1AMODE);
  61
  62        sgioc->reset = sgi_ioc_reset;
  63        sgioc->write = sgi_ioc_write;
  64}
  65