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torvalds
GitHub Repository: torvalds/linux
 Path: blob/master/arch/mips/sgi-ip22/ip22-hpc.c
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// SPDX-License-Identifier: GPL-2.0

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/*

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 * ip22-hpc.c: Routines for generic manipulation of the HPC controllers.

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 *

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 * Copyright (C) 1996 David S. Miller ([email protected])

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 * Copyright (C) 1998 Ralf Baechle

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 */

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#include <linux/export.h>

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#include <linux/init.h>

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#include <linux/types.h>

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#include <asm/io.h>

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#include <asm/sgi/hpc3.h>

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#include <asm/sgi/ioc.h>

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#include <asm/sgi/ip22.h>

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struct hpc3_regs *hpc3c0, *hpc3c1;

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EXPORT_SYMBOL(hpc3c0);

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EXPORT_SYMBOL(hpc3c1);

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struct sgioc_regs *sgioc;

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EXPORT_SYMBOL(sgioc);

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/* We need software copies of these because they are write only. */

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u8 sgi_ioc_reset, sgi_ioc_write;

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extern char *system_type;

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void __init sgihpc_init(void)

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{

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	/* ioremap can't fail */

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	hpc3c0 = (struct hpc3_regs *)

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		 ioremap(HPC3_CHIP0_BASE, sizeof(struct hpc3_regs));

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	hpc3c1 = (struct hpc3_regs *)

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		 ioremap(HPC3_CHIP1_BASE, sizeof(struct hpc3_regs));

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	/* IOC lives in PBUS PIO channel 6 */

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	sgioc = (struct sgioc_regs *)hpc3c0->pbus_extregs[6];

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	hpc3c0->pbus_piocfg[6][0] |= HPC3_PIOCFG_DS16;

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	if (ip22_is_fullhouse()) {

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		/* Full House comes with INT2 which lives in PBUS PIO

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		 * channel 4 */

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		sgint = (struct sgint_regs *)hpc3c0->pbus_extregs[4];

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		system_type = "SGI Indigo2";

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	} else {

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		/* Guiness comes with INT3 which is part of IOC */

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		sgint = &sgioc->int3;

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		system_type = "SGI Indy";

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	}

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	sgi_ioc_reset = (SGIOC_RESET_PPORT | SGIOC_RESET_KBDMOUSE |

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			 SGIOC_RESET_EISA | SGIOC_RESET_ISDN |

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			 SGIOC_RESET_LC0OFF);

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	sgi_ioc_write = (SGIOC_WRITE_EASEL | SGIOC_WRITE_NTHRESH |

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			 SGIOC_WRITE_TPSPEED | SGIOC_WRITE_EPSEL |

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			 SGIOC_WRITE_U0AMODE | SGIOC_WRITE_U1AMODE);

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	sgioc->reset = sgi_ioc_reset;

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	sgioc->write = sgi_ioc_write;

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}

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