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
  18 struct hpc3_regs *hpc3c0, *hpc3c1;
  19
  20 EXPORT_SYMBOL(hpc3c0);
  21 EXPORT_SYMBOL(hpc3c1);
  22
  23 struct sgioc_regs *sgioc;
  24
  25 EXPORT_SYMBOL(sgioc);
  26
  27 /* We need software copies of these because they are write only. */
  28 u8 sgi_ioc_reset, sgi_ioc_write;
  29
  30 extern char *system_type;
  31
  32 void __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 }