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
44 static inline int i8042_read_data(void)
45 {
46 return inb(I8042_DATA_REG);
47 }
48
49 static inline int i8042_read_status(void)
50 {
51 return inb(I8042_STATUS_REG);
52 }
53
54 static inline void i8042_write_data(int val)
55 {
56 outb(val, I8042_DATA_REG);
57 }
58
59 static inline void i8042_write_command(int val)
60 {
61 outb(val, I8042_COMMAND_REG);
62 }
63
64 static 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
86 static 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 */
94
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