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