99 строки
2.0 KiB
C
99 строки
2.0 KiB
C
// SPDX-License-Identifier: GPL-2.0
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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 tag *tags, char **cmdline)
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{
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#if defined(CONFIG_VGA_CONSOLE) || defined(CONFIG_DUMMY_CONSOLE)
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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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#endif
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}
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MACHINE_START(CATS, "Chalice-CATS")
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/* Maintainer: Philip Blundell */
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.atag_offset = 0x100,
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.reboot_mode = REBOOT_SOFT,
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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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.init_time = isa_timer_init,
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.restart = footbridge_restart,
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MACHINE_END
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