mirror of https://gitee.com/openkylin/linux.git
73 lines
1.7 KiB
C
73 lines
1.7 KiB
C
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/*
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* linux/arch/arm26/kernel/latches.c
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*
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* Copyright (C) David Alan Gilbert 1995/1996,2000
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* Copyright (C) Ian Molton 2003
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* Support for the latches on the old Archimedes which control the floppy,
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* hard disc and printer
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*/
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/sched.h>
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#include <asm/io.h>
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#include <asm/hardware.h>
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#include <asm/mach-types.h>
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#include <asm/oldlatches.h>
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static unsigned char latch_a_copy;
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static unsigned char latch_b_copy;
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/* newval=(oldval & ~mask)|newdata */
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void oldlatch_aupdate(unsigned char mask,unsigned char newdata)
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{
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unsigned long flags;
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BUG_ON(!machine_is_archimedes());
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local_irq_save(flags); //FIXME: was local_save_flags
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latch_a_copy = (latch_a_copy & ~mask) | newdata;
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__raw_writeb(latch_a_copy, LATCHA_BASE);
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local_irq_restore(flags);
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printk("Latch: A = 0x%02x\n", latch_a_copy);
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}
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/* newval=(oldval & ~mask)|newdata */
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void oldlatch_bupdate(unsigned char mask,unsigned char newdata)
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{
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unsigned long flags;
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BUG_ON(!machine_is_archimedes());
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local_irq_save(flags);//FIXME: was local_save_flags
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latch_b_copy = (latch_b_copy & ~mask) | newdata;
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__raw_writeb(latch_b_copy, LATCHB_BASE);
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local_irq_restore(flags);
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printk("Latch: B = 0x%02x\n", latch_b_copy);
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}
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static int __init oldlatch_init(void)
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{
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if (machine_is_archimedes()) {
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oldlatch_aupdate(0xff, 0xff);
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/* Thats no FDC reset...*/
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oldlatch_bupdate(0xff, LATCHB_FDCRESET);
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}
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return 0;
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}
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arch_initcall(oldlatch_init);
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EXPORT_SYMBOL(oldlatch_aupdate);
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EXPORT_SYMBOL(oldlatch_bupdate);
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