/*
   * ip22-hpc.c: Routines for generic manipulation of the HPC controllers.
   *
   * Copyright (C) 1996 David S. Miller (davem@davemloft.net)
   * 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;
  }