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// 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(void)
{
return base;
}
char *__init pc873xx_get_model(void)
{
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);
}
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