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awilliam
GitHub Repository: awilliam/linux-vfio
 Path: blob/master/arch/arm/mach-footbridge/cats-hw.c
10817 views
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/*

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 * linux/arch/arm/mach-footbridge/cats-hw.c

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 *

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 * CATS machine fixup

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 *

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 * Copyright (C) 1998, 1999 Russell King, Phil Blundell

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 */

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#include <linux/ioport.h>

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#include <linux/kernel.h>

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#include <linux/init.h>

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#include <linux/screen_info.h>

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#include <linux/io.h>

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#include <linux/spinlock.h>

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#include <asm/hardware/dec21285.h>

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#include <asm/mach-types.h>

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#include <asm/setup.h>

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#include <asm/mach/arch.h>

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#include "common.h"

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#define CFG_PORT	0x370

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#define INDEX_PORT	(CFG_PORT)

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#define DATA_PORT	(CFG_PORT + 1)

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static int __init cats_hw_init(void)

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{

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	if (machine_is_cats()) {

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		/* Set Aladdin to CONFIGURE mode */

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		outb(0x51, CFG_PORT);

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		outb(0x23, CFG_PORT);

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		/* Select logical device 3 */

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		outb(0x07, INDEX_PORT);

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		outb(0x03, DATA_PORT);

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		/* Set parallel port to DMA channel 3, ECP+EPP1.9, 

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		   enable EPP timeout */

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		outb(0x74, INDEX_PORT);

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		outb(0x03, DATA_PORT);

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		outb(0xf0, INDEX_PORT);

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		outb(0x0f, DATA_PORT);

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		outb(0xf1, INDEX_PORT);

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		outb(0x07, DATA_PORT);

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		/* Select logical device 4 */

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		outb(0x07, INDEX_PORT);

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		outb(0x04, DATA_PORT);

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		/* UART1 high speed mode */

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		outb(0xf0, INDEX_PORT);

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		outb(0x02, DATA_PORT);

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		/* Select logical device 5 */

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		outb(0x07, INDEX_PORT);

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		outb(0x05, DATA_PORT);

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		/* UART2 high speed mode */

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		outb(0xf0, INDEX_PORT);

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		outb(0x02, DATA_PORT);

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		/* Set Aladdin to RUN mode */

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		outb(0xbb, CFG_PORT);

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	}

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	return 0;

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}

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__initcall(cats_hw_init);

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/*

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 * CATS uses soft-reboot by default, since

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 * hard reboots fail on early boards.

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 */

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static void __init

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fixup_cats(struct machine_desc *desc, struct tag *tags,

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	   char **cmdline, struct meminfo *mi)

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{

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	screen_info.orig_video_lines  = 25;

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	screen_info.orig_video_points = 16;

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	screen_info.orig_y = 24;

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}

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MACHINE_START(CATS, "Chalice-CATS")

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	/* Maintainer: Philip Blundell */

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	.boot_params	= 0x00000100,

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	.soft_reboot	= 1,

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	.fixup		= fixup_cats,

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	.map_io		= footbridge_map_io,

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	.init_irq	= footbridge_init_irq,

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	.timer		= &isa_timer,

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MACHINE_END

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