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)
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 
i8042_read_data(void)43 static inline int i8042_read_data(void)
44 {
45 	return inb(I8042_DATA_REG);
46 }
47 
i8042_read_status(void)48 static inline int i8042_read_status(void)
49 {
50 	return inb(I8042_STATUS_REG);
51 }
52 
i8042_write_data(int val)53 static inline void i8042_write_data(int val)
54 {
55 	outb(val, I8042_DATA_REG);
56 }
57 
i8042_write_command(int val)58 static inline void i8042_write_command(int val)
59 {
60 	outb(val, I8042_COMMAND_REG);
61 }
62 
i8042_platform_init(void)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 
i8042_platform_exit(void)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