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Commit | Line | Data |
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b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
932e0c20 ML |
2 | #include <linux/ioport.h> |
3 | #include <asm/io.h> | |
4 | ||
5 | #include "pc873xx.h" | |
6 | ||
7 | static unsigned pc873xx_probelist[] = {0x398, 0x26e, 0}; | |
8 | ||
9 | static char *pc873xx_names[] = { | |
10 | "PC87303", "PC87306", "PC87312", "PC87332", "PC87334" | |
11 | }; | |
12 | ||
13 | static unsigned int base, model; | |
14 | ||
15 | ||
543203d2 | 16 | unsigned int __init pc873xx_get_base(void) |
932e0c20 ML |
17 | { |
18 | return base; | |
19 | } | |
20 | ||
543203d2 | 21 | char *__init pc873xx_get_model(void) |
932e0c20 ML |
22 | { |
23 | return pc873xx_names[model]; | |
24 | } | |
25 | ||
26 | static unsigned char __init pc873xx_read(unsigned int base, int reg) | |
27 | { | |
28 | outb(reg, base); | |
29 | return inb(base + 1); | |
30 | } | |
31 | ||
32 | static void __init pc873xx_write(unsigned int base, int reg, unsigned char data) | |
33 | { | |
34 | unsigned long flags; | |
35 | ||
36 | local_irq_save(flags); | |
37 | outb(reg, base); | |
38 | outb(data, base + 1); | |
39 | outb(data, base + 1); /* Must be written twice */ | |
40 | local_irq_restore(flags); | |
41 | } | |
42 | ||
43 | int __init pc873xx_probe(void) | |
44 | { | |
45 | int val, index = 0; | |
46 | ||
47 | while ((base = pc873xx_probelist[index++])) { | |
48 | ||
49 | if (request_region(base, 2, "Super IO PC873xx") == NULL) | |
50 | continue; | |
51 | ||
52 | val = pc873xx_read(base, REG_SID); | |
53 | if ((val & 0xf0) == 0x10) { | |
54 | model = PC87332; | |
55 | break; | |
56 | } else if ((val & 0xf8) == 0x70) { | |
57 | model = PC87306; | |
58 | break; | |
59 | } else if ((val & 0xf8) == 0x50) { | |
60 | model = PC87334; | |
61 | break; | |
62 | } else if ((val & 0xf8) == 0x40) { | |
63 | model = PC87303; | |
64 | break; | |
65 | } | |
66 | ||
67 | release_region(base, 2); | |
68 | } | |
69 | ||
70 | return (base == 0) ? -1 : 1; | |
71 | } | |
72 | ||
73 | void __init pc873xx_enable_epp19(void) | |
74 | { | |
75 | unsigned char data; | |
76 | ||
77 | printk(KERN_INFO "PC873xx enabling EPP v1.9\n"); | |
78 | data = pc873xx_read(base, REG_PCR); | |
79 | pc873xx_write(base, REG_PCR, (data & 0xFC) | 0x02); | |
80 | } | |
81 | ||
82 | void __init pc873xx_enable_ide(void) | |
83 | { | |
84 | unsigned char data; | |
85 | ||
86 | printk(KERN_INFO "PC873xx enabling IDE interrupt\n"); | |
87 | data = pc873xx_read(base, REG_FER); | |
88 | pc873xx_write(base, REG_FER, data | 0x40); | |
89 | } |