90 lines
1.7 KiB
C
90 lines
1.7 KiB
C
|
// SPDX-License-Identifier: GPL-2.0
|
||
|
|
#include <linux/ioport.h>
|
||
|
|
#include <asm/io.h>
|
||
|
|
|
||
|
|
#include "pc873xx.h"
|
||
|
|
|
||
|
|
static unsigned pc873xx_probelist[] = {0x398, 0x26e, 0};
|
||
|
|
|
||
|
|
static char *pc873xx_names[] = {
|
||
|
|
"PC87303", "PC87306", "PC87312", "PC87332", "PC87334"
|
||
|
|
};
|
||
|
|
|
||
|
|
static unsigned int base, model;
|
||
|
|
|
||
|
|
|
||
|
|
unsigned int __init pc873xx_get_base()
|
||
|
|
{
|
||
|
|
return base;
|
||
|
|
}
|
||
|
|
|
||
|
|
char *__init pc873xx_get_model()
|
||
|
|
{
|
||
|
|
return pc873xx_names[model];
|
||
|
|
}
|
||
|
|
|
||
|
|
static unsigned char __init pc873xx_read(unsigned int base, int reg)
|
||
|
|
{
|
||
|
|
outb(reg, base);
|
||
|
|
return inb(base + 1);
|
||
|
|
}
|
||
|
|
|
||
|
|
static void __init pc873xx_write(unsigned int base, int reg, unsigned char data)
|
||
|
|
{
|
||
|
|
unsigned long flags;
|
||
|
|
|
||
|
|
local_irq_save(flags);
|
||
|
|
outb(reg, base);
|
||
|
|
outb(data, base + 1);
|
||
|
|
outb(data, base + 1); /* Must be written twice */
|
||
|
|
local_irq_restore(flags);
|
||
|
|
}
|
||
|
|
|
||
|
|
int __init pc873xx_probe(void)
|
||
|
|
{
|
||
|
|
int val, index = 0;
|
||
|
|
|
||
|
|
while ((base = pc873xx_probelist[index++])) {
|
||
|
|
|
||
|
|
if (request_region(base, 2, "Super IO PC873xx") == NULL)
|
||
|
|
continue;
|
||
|
|
|
||
|
|
val = pc873xx_read(base, REG_SID);
|
||
|
|
if ((val & 0xf0) == 0x10) {
|
||
|
|
model = PC87332;
|
||
|
|
break;
|
||
|
|
} else if ((val & 0xf8) == 0x70) {
|
||
|
|
model = PC87306;
|
||
|
|
break;
|
||
|
|
} else if ((val & 0xf8) == 0x50) {
|
||
|
|
model = PC87334;
|
||
|
|
break;
|
||
|
|
} else if ((val & 0xf8) == 0x40) {
|
||
|
|
model = PC87303;
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
|
||
|
|
release_region(base, 2);
|
||
|
|
}
|
||
|
|
|
||
|
|
return (base == 0) ? -1 : 1;
|
||
|
|
}
|
||
|
|
|
||
|
|
void __init pc873xx_enable_epp19(void)
|
||
|
|
{
|
||
|
|
unsigned char data;
|
||
|
|
|
||
|
|
printk(KERN_INFO "PC873xx enabling EPP v1.9\n");
|
||
|
|
data = pc873xx_read(base, REG_PCR);
|
||
|
|
pc873xx_write(base, REG_PCR, (data & 0xFC) | 0x02);
|
||
|
|
}
|
||
|
|
|
||
|
|
void __init pc873xx_enable_ide(void)
|
||
|
|
{
|
||
|
|
unsigned char data;
|
||
|
|
|
||
|
|
printk(KERN_INFO "PC873xx enabling IDE interrupt\n");
|
||
|
|
data = pc873xx_read(base, REG_FER);
|
||
|
|
pc873xx_write(base, REG_FER, data | 0x40);
|
||
|
|
}
|