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#if defined(__arm__)
 
 
 
19/* defined in include/asm-arm/arch-xxx/irqs.h */
20#include <asm/irq.h>
21#elif defined(CONFIG_PPC)
22extern int of_i8042_kbd_irq;
23extern int of_i8042_aux_irq;
24# define I8042_KBD_IRQ  of_i8042_kbd_irq
25# define I8042_AUX_IRQ  of_i8042_aux_irq
26#else
27# define I8042_KBD_IRQ	1
28# define I8042_AUX_IRQ	12
29#endif
30
31
32/*
33 * Register numbers.
34 */
35
36#define I8042_COMMAND_REG	0x64
37#define I8042_STATUS_REG	0x64
38#define I8042_DATA_REG		0x60
39
40static inline int i8042_read_data(void)
41{
42	return inb(I8042_DATA_REG);
43}
44
45static inline int i8042_read_status(void)
46{
47	return inb(I8042_STATUS_REG);
48}
49
50static inline void i8042_write_data(int val)
51{
52	outb(val, I8042_DATA_REG);
53}
54
55static inline void i8042_write_command(int val)
56{
57	outb(val, I8042_COMMAND_REG);
58}
59
60static inline int i8042_platform_init(void)
61{
62/*
63 * On some platforms touching the i8042 data register region can do really
64 * bad things. Because of this the region is always reserved on such boxes.
65 */
66#if defined(CONFIG_PPC)
67	if (check_legacy_ioport(I8042_DATA_REG))
68		return -ENODEV;
69#endif
70#if !defined(__sh__) && !defined(__alpha__)
71	if (!request_region(I8042_DATA_REG, 16, "i8042"))
72		return -EBUSY;
73#endif
74
75	i8042_reset = I8042_RESET_ALWAYS;
76	return 0;
77}
78
79static inline void i8042_platform_exit(void)
80{
81#if !defined(__sh__) && !defined(__alpha__)
82	release_region(I8042_DATA_REG, 16);
83#endif
84}
85
86#endif /* _I8042_IO_H */

 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_PPC)
25extern int of_i8042_kbd_irq;
26extern 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
43static inline int i8042_read_data(void)
44{
45	return inb(I8042_DATA_REG);
46}
47
48static inline int i8042_read_status(void)
49{
50	return inb(I8042_STATUS_REG);
51}
52
53static inline void i8042_write_data(int val)
54{
55	outb(val, I8042_DATA_REG);
56}
57
58static inline void i8042_write_command(int val)
59{
60	outb(val, I8042_COMMAND_REG);
61}
62
63static 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
82static 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 */