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 */

 
 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)
31extern int of_i8042_kbd_irq;
32extern 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
49static inline int i8042_read_data(void)
50{
51	return inb(I8042_DATA_REG);
52}
53
54static inline int i8042_read_status(void)
55{
56	return inb(I8042_STATUS_REG);
57}
58
59static inline void i8042_write_data(int val)
60{
61	outb(val, I8042_DATA_REG);
62}
63
64static inline void i8042_write_command(int val)
65{
66	outb(val, I8042_COMMAND_REG);
67}
68
69static 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)
76	if (check_legacy_ioport(I8042_DATA_REG))
77		return -ENODEV;
78#endif
79#if !defined(__sh__) && !defined(__alpha__)
80	if (!request_region(I8042_DATA_REG, 16, "i8042"))
81		return -EBUSY;
82#endif
83
84	i8042_reset = 1;
85	return 0;
86}
87
88static inline void i8042_platform_exit(void)
89{
90#if !defined(__sh__) && !defined(__alpha__)
91	release_region(I8042_DATA_REG, 16);
92#endif
93}
94
95#endif /* _I8042_IO_H */