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

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