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1da177e4 LT |
1 | #ifndef _I8042_IO_H |
2 | #define _I8042_IO_H | |
3 | ||
4 | /* | |
5 | * This program is free software; you can redistribute it and/or modify it | |
6 | * under the terms of the GNU General Public License version 2 as published by | |
7 | * the Free Software Foundation. | |
8 | */ | |
9 | ||
10 | /* | |
11 | * Names. | |
12 | */ | |
13 | ||
14 | #define I8042_KBD_PHYS_DESC "isa0060/serio0" | |
15 | #define I8042_AUX_PHYS_DESC "isa0060/serio1" | |
16 | #define I8042_MUX_PHYS_DESC "isa0060/serio%d" | |
17 | ||
18 | /* | |
19 | * IRQs. | |
20 | */ | |
21 | ||
22 | #ifdef __alpha__ | |
23 | # define I8042_KBD_IRQ 1 | |
24 | # define I8042_AUX_IRQ (RTC_PORT(0) == 0x170 ? 9 : 12) /* Jensen is special */ | |
25 | #elif defined(__arm__) | |
26 | /* defined in include/asm-arm/arch-xxx/irqs.h */ | |
27 | #include <asm/irq.h> | |
105eabfd | 28 | #elif defined(CONFIG_SH_CAYMAN) |
1da177e4 | 29 | #include <asm/irq.h> |
540c6c39 MW |
30 | #elif defined(CONFIG_PPC) |
31 | extern int of_i8042_kbd_irq; | |
32 | extern int of_i8042_aux_irq; | |
33 | # define I8042_KBD_IRQ of_i8042_kbd_irq | |
34 | # define I8042_AUX_IRQ of_i8042_aux_irq | |
1da177e4 LT |
35 | #else |
36 | # define I8042_KBD_IRQ 1 | |
37 | # define I8042_AUX_IRQ 12 | |
38 | #endif | |
39 | ||
40 | ||
41 | /* | |
42 | * Register numbers. | |
43 | */ | |
44 | ||
45 | #define I8042_COMMAND_REG 0x64 | |
46 | #define I8042_STATUS_REG 0x64 | |
47 | #define I8042_DATA_REG 0x60 | |
48 | ||
49 | static inline int i8042_read_data(void) | |
50 | { | |
51 | return inb(I8042_DATA_REG); | |
52 | } | |
53 | ||
54 | static inline int i8042_read_status(void) | |
55 | { | |
56 | return inb(I8042_STATUS_REG); | |
57 | } | |
58 | ||
59 | static inline void i8042_write_data(int val) | |
60 | { | |
61 | outb(val, I8042_DATA_REG); | |
62 | } | |
63 | ||
64 | static inline void i8042_write_command(int val) | |
65 | { | |
66 | outb(val, I8042_COMMAND_REG); | |
67 | } | |
68 | ||
69 | static inline int i8042_platform_init(void) | |
70 | { | |
71 | /* | |
72 | * On some platforms touching the i8042 data register region can do really | |
73 | * bad things. Because of this the region is always reserved on such boxes. | |
74 | */ | |
68e1ee62 | 75 | #if defined(CONFIG_PPC) |
1da177e4 | 76 | if (check_legacy_ioport(I8042_DATA_REG)) |
30cbc222 OH |
77 | return -ENODEV; |
78 | #endif | |
79 | #if !defined(__sh__) && !defined(__alpha__) && !defined(__mips__) | |
1da177e4 | 80 | if (!request_region(I8042_DATA_REG, 16, "i8042")) |
8d5987a6 | 81 | return -EBUSY; |
1da177e4 | 82 | #endif |
30cbc222 OH |
83 | |
84 | i8042_reset = 1; | |
1da177e4 LT |
85 | return 0; |
86 | } | |
87 | ||
88 | static inline void i8042_platform_exit(void) | |
89 | { | |
30cbc222 | 90 | #if !defined(__sh__) && !defined(__alpha__) |
1da177e4 LT |
91 | release_region(I8042_DATA_REG, 16); |
92 | #endif | |
93 | } | |
94 | ||
95 | #endif /* _I8042_IO_H */ |