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Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
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linux
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>
28#elif defined(CONFIG_SUPERH64)
29#include <asm/irq.h>
30#else
31# define I8042_KBD_IRQ 1
32# define I8042_AUX_IRQ 12
33#endif
34
35
36/*
37 * Register numbers.
38 */
39
40#define I8042_COMMAND_REG 0x64
41#define I8042_STATUS_REG 0x64
42#define I8042_DATA_REG 0x60
43
44static inline int i8042_read_data(void)
45{
46 return inb(I8042_DATA_REG);
47}
48
49static inline int i8042_read_status(void)
50{
51 return inb(I8042_STATUS_REG);
52}
53
54static inline void i8042_write_data(int val)
55{
56 outb(val, I8042_DATA_REG);
57}
58
59static inline void i8042_write_command(int val)
60{
61 outb(val, I8042_COMMAND_REG);
62}
63
64static inline int i8042_platform_init(void)
65{
66/*
67 * On some platforms touching the i8042 data register region can do really
68 * bad things. Because of this the region is always reserved on such boxes.
69 */
70#if !defined(__sh__) && !defined(__alpha__) && !defined(__mips__) && !defined(CONFIG_PPC64)
71 if (!request_region(I8042_DATA_REG, 16, "i8042"))
72 return -1;
73#endif
74
75 i8042_reset = 1;
76
77#if defined(CONFIG_PPC64)
78 if (check_legacy_ioport(I8042_DATA_REG))
79 return -1;
80 if (!request_region(I8042_DATA_REG, 16, "i8042"))
81 return -1;
82#endif
83 return 0;
84}
85
86static inline void i8042_platform_exit(void)
87{
88#if !defined(__sh__) && !defined(__alpha__) && !defined(CONFIG_PPC64)
89 release_region(I8042_DATA_REG, 16);
90#endif
91}
92
93#endif /* _I8042_IO_H */