mirror of
https://github.com/torvalds/linux.git
synced 2024-11-01 09:41:44 +00:00
1da177e4c3
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
73 lines
1.7 KiB
C
73 lines
1.7 KiB
C
/*
|
|
* linux/arch/arm26/kernel/latches.c
|
|
*
|
|
* Copyright (C) David Alan Gilbert 1995/1996,2000
|
|
* Copyright (C) Ian Molton 2003
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
* published by the Free Software Foundation.
|
|
*
|
|
* Support for the latches on the old Archimedes which control the floppy,
|
|
* hard disc and printer
|
|
*/
|
|
#include <linux/module.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/init.h>
|
|
#include <linux/sched.h>
|
|
|
|
#include <asm/io.h>
|
|
#include <asm/hardware.h>
|
|
#include <asm/mach-types.h>
|
|
#include <asm/oldlatches.h>
|
|
|
|
static unsigned char latch_a_copy;
|
|
static unsigned char latch_b_copy;
|
|
|
|
/* newval=(oldval & ~mask)|newdata */
|
|
void oldlatch_aupdate(unsigned char mask,unsigned char newdata)
|
|
{
|
|
unsigned long flags;
|
|
|
|
BUG_ON(!machine_is_archimedes());
|
|
|
|
local_irq_save(flags); //FIXME: was local_save_flags
|
|
latch_a_copy = (latch_a_copy & ~mask) | newdata;
|
|
__raw_writeb(latch_a_copy, LATCHA_BASE);
|
|
local_irq_restore(flags);
|
|
|
|
printk("Latch: A = 0x%02x\n", latch_a_copy);
|
|
}
|
|
|
|
|
|
/* newval=(oldval & ~mask)|newdata */
|
|
void oldlatch_bupdate(unsigned char mask,unsigned char newdata)
|
|
{
|
|
unsigned long flags;
|
|
|
|
BUG_ON(!machine_is_archimedes());
|
|
|
|
|
|
local_irq_save(flags);//FIXME: was local_save_flags
|
|
latch_b_copy = (latch_b_copy & ~mask) | newdata;
|
|
__raw_writeb(latch_b_copy, LATCHB_BASE);
|
|
local_irq_restore(flags);
|
|
|
|
printk("Latch: B = 0x%02x\n", latch_b_copy);
|
|
}
|
|
|
|
static int __init oldlatch_init(void)
|
|
{
|
|
if (machine_is_archimedes()) {
|
|
oldlatch_aupdate(0xff, 0xff);
|
|
/* Thats no FDC reset...*/
|
|
oldlatch_bupdate(0xff, LATCHB_FDCRESET);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
arch_initcall(oldlatch_init);
|
|
|
|
EXPORT_SYMBOL(oldlatch_aupdate);
|
|
EXPORT_SYMBOL(oldlatch_bupdate);
|