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i8042-io.h
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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_SH_CAYMAN)
29 #include <asm/irq.h>
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
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  */
75 #if defined(CONFIG_PPC)
77  return -ENODEV;
78 #endif
79 #if !defined(__sh__) && !defined(__alpha__) && !defined(__mips__)
80  if (!request_region(I8042_DATA_REG, 16, "i8042"))
81  return -EBUSY;
82 #endif
83 
84  i8042_reset = 1;
85  return 0;
86 }
87 
88 static inline void i8042_platform_exit(void)
89 {
90 #if !defined(__sh__) && !defined(__alpha__)
92 #endif
93 }
94 
95 #endif /* _I8042_IO_H */