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Diffstat (limited to 'arch/alpha/kernel/pc873xx.c')
-rw-r--r--arch/alpha/kernel/pc873xx.c88
1 files changed, 88 insertions, 0 deletions
diff --git a/arch/alpha/kernel/pc873xx.c b/arch/alpha/kernel/pc873xx.c
new file mode 100644
index 000000000000..27dcbff85613
--- /dev/null
+++ b/arch/alpha/kernel/pc873xx.c
@@ -0,0 +1,88 @@
1#include <linux/ioport.h>
2#include <asm/io.h>
3
4#include "pc873xx.h"
5
6static unsigned pc873xx_probelist[] = {0x398, 0x26e, 0};
7
8static char *pc873xx_names[] = {
9 "PC87303", "PC87306", "PC87312", "PC87332", "PC87334"
10};
11
12static unsigned int base, model;
13
14
15unsigned int __init pc873xx_get_base()
16{
17 return base;
18}
19
20char *__init pc873xx_get_model()
21{
22 return pc873xx_names[model];
23}
24
25static unsigned char __init pc873xx_read(unsigned int base, int reg)
26{
27 outb(reg, base);
28 return inb(base + 1);
29}
30
31static void __init pc873xx_write(unsigned int base, int reg, unsigned char data)
32{
33 unsigned long flags;
34
35 local_irq_save(flags);
36 outb(reg, base);
37 outb(data, base + 1);
38 outb(data, base + 1); /* Must be written twice */
39 local_irq_restore(flags);
40}
41
42int __init pc873xx_probe(void)
43{
44 int val, index = 0;
45
46 while ((base = pc873xx_probelist[index++])) {
47
48 if (request_region(base, 2, "Super IO PC873xx") == NULL)
49 continue;
50
51 val = pc873xx_read(base, REG_SID);
52 if ((val & 0xf0) == 0x10) {
53 model = PC87332;
54 break;
55 } else if ((val & 0xf8) == 0x70) {
56 model = PC87306;
57 break;
58 } else if ((val & 0xf8) == 0x50) {
59 model = PC87334;
60 break;
61 } else if ((val & 0xf8) == 0x40) {
62 model = PC87303;
63 break;
64 }
65
66 release_region(base, 2);
67 }
68
69 return (base == 0) ? -1 : 1;
70}
71
72void __init pc873xx_enable_epp19(void)
73{
74 unsigned char data;
75
76 printk(KERN_INFO "PC873xx enabling EPP v1.9\n");
77 data = pc873xx_read(base, REG_PCR);
78 pc873xx_write(base, REG_PCR, (data & 0xFC) | 0x02);
79}
80
81void __init pc873xx_enable_ide(void)
82{
83 unsigned char data;
84
85 printk(KERN_INFO "PC873xx enabling IDE interrupt\n");
86 data = pc873xx_read(base, REG_FER);
87 pc873xx_write(base, REG_FER, data | 0x40);
88}