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1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
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2 | #ifndef _I8042_IO_H |
3 | #define _I8042_IO_H |
4 | |
5 | |
6 | /* |
7 | * Names. |
8 | */ |
9 | |
10 | #define I8042_KBD_PHYS_DESC "isa0060/serio0" |
11 | #define I8042_AUX_PHYS_DESC "isa0060/serio1" |
12 | #define I8042_MUX_PHYS_DESC "isa0060/serio%d" |
13 | |
14 | /* |
15 | * IRQs. |
16 | */ |
17 | |
18 | #ifdef __alpha__ |
19 | # define I8042_KBD_IRQ 1 |
20 | # define I8042_AUX_IRQ (RTC_PORT(0) == 0x170 ? 9 : 12) /* Jensen is special */ |
21 | #elif defined(__arm__) |
22 | /* defined in include/asm-arm/arch-xxx/irqs.h */ |
23 | #include <asm/irq.h> |
24 | #elif defined(CONFIG_PPC) |
25 | extern int of_i8042_kbd_irq; |
26 | extern int of_i8042_aux_irq; |
27 | # define I8042_KBD_IRQ of_i8042_kbd_irq |
28 | # define I8042_AUX_IRQ of_i8042_aux_irq |
29 | #else |
30 | # define I8042_KBD_IRQ 1 |
31 | # define I8042_AUX_IRQ 12 |
32 | #endif |
33 | |
34 | |
35 | /* |
36 | * Register numbers. |
37 | */ |
38 | |
39 | #define I8042_COMMAND_REG 0x64 |
40 | #define I8042_STATUS_REG 0x64 |
41 | #define I8042_DATA_REG 0x60 |
42 | |
43 | static inline int i8042_read_data(void) |
44 | { |
45 | return inb(I8042_DATA_REG); |
46 | } |
47 | |
48 | static inline int i8042_read_status(void) |
49 | { |
50 | return inb(I8042_STATUS_REG); |
51 | } |
52 | |
53 | static inline void i8042_write_data(int val) |
54 | { |
55 | outb(val, I8042_DATA_REG); |
56 | } |
57 | |
58 | static inline void i8042_write_command(int val) |
59 | { |
60 | outb(val, I8042_COMMAND_REG); |
61 | } |
62 | |
63 | static inline int i8042_platform_init(void) |
64 | { |
65 | /* |
66 | * On some platforms touching the i8042 data register region can do really |
67 | * bad things. Because of this the region is always reserved on such boxes. |
68 | */ |
69 | #if defined(CONFIG_PPC) |
70 | if (check_legacy_ioport(I8042_DATA_REG)) |
71 | return -ENODEV; |
72 | #endif |
73 | #if !defined(__sh__) && !defined(__alpha__) |
74 | if (!request_region(I8042_DATA_REG, 16, "i8042")) |
75 | return -EBUSY; |
76 | #endif |
77 | |
78 | i8042_reset = I8042_RESET_ALWAYS; |
79 | return 0; |
80 | } |
81 | |
82 | static inline void i8042_platform_exit(void) |
83 | { |
84 | #if !defined(__sh__) && !defined(__alpha__) |
85 | release_region(I8042_DATA_REG, 16); |
86 | #endif |
87 | } |
88 | |
89 | #endif /* _I8042_IO_H */ |
90 |
Warning: This file is not a C or C++ file. It does not have highlighting.