tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
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linux
1/* SPDX-License-Identifier: GPL-2.0-only */
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_SH_CAYMAN)
25#include <asm/irq.h>
26#elif defined(CONFIG_PPC)
27extern int of_i8042_kbd_irq;
28extern int of_i8042_aux_irq;
29# define I8042_KBD_IRQ of_i8042_kbd_irq
30# define I8042_AUX_IRQ of_i8042_aux_irq
31#else
32# define I8042_KBD_IRQ 1
33# define I8042_AUX_IRQ 12
34#endif
35
36
37/*
38 * Register numbers.
39 */
40
41#define I8042_COMMAND_REG 0x64
42#define I8042_STATUS_REG 0x64
43#define I8042_DATA_REG 0x60
44
45static inline int i8042_read_data(void)
46{
47 return inb(I8042_DATA_REG);
48}
49
50static inline int i8042_read_status(void)
51{
52 return inb(I8042_STATUS_REG);
53}
54
55static inline void i8042_write_data(int val)
56{
57 outb(val, I8042_DATA_REG);
58}
59
60static inline void i8042_write_command(int val)
61{
62 outb(val, I8042_COMMAND_REG);
63}
64
65static inline int i8042_platform_init(void)
66{
67/*
68 * On some platforms touching the i8042 data register region can do really
69 * bad things. Because of this the region is always reserved on such boxes.
70 */
71#if defined(CONFIG_PPC)
72 if (check_legacy_ioport(I8042_DATA_REG))
73 return -ENODEV;
74#endif
75#if !defined(__sh__) && !defined(__alpha__)
76 if (!request_region(I8042_DATA_REG, 16, "i8042"))
77 return -EBUSY;
78#endif
79
80 i8042_reset = I8042_RESET_ALWAYS;
81 return 0;
82}
83
84static inline void i8042_platform_exit(void)
85{
86#if !defined(__sh__) && !defined(__alpha__)
87 release_region(I8042_DATA_REG, 16);
88#endif
89}
90
91#endif /* _I8042_IO_H */