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/* Support for the latches on the old Archimedes which control the floppy,
* hard disc and printer
*
* (c) David Alan Gilbert 1995/1996
*/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <asm/io.h>
#include <asm/hardware.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)
{
if (machine_is_arc()) {
latch_a_copy = (latch_a_copy & ~mask) | newdata;
printk("Latch: A = 0x%02x\n", latch_a_copy);
outb(latch_a_copy, LATCHAADDR);
} else
BUG();
}
/* newval=(oldval & ~mask)|newdata */
void oldlatch_bupdate(unsigned char mask,unsigned char newdata)
{
if (machine_is_arc()) {
latch_b_copy = (latch_b_copy & ~mask) | newdata;
printk("Latch: B = 0x%02x\n", latch_b_copy);
outb(latch_b_copy, LATCHBADDR);
} else
BUG();
}
static void __init oldlatch_init(void)
{
if (machine_is_arc()) {
oldlatch_aupdate(0xff, 0xff);
/* Thats no FDC reset...*/
oldlatch_bupdate(0xff, LATCHB_FDCRESET);
}
}
initcall(oldlatch_init);
EXPORT_SYMBOL(oldlatch_aupdate);
EXPORT_SYMBOL(oldlatch_bupdate);
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