xref: /openbmc/u-boot/include/i8042.h (revision 3e9aa320)
1 /*
2  * (C) Copyright 2002 ELTEC Elektronik AG
3  * Frank Gottschling <fgottschling@eltec.de>
4  *
5  * SPDX-License-Identifier:	GPL-2.0+
6  */
7 
8 /* i8042.h - Intel 8042 keyboard driver header */
9 
10 #ifndef _I8042_H_
11 #define _I8042_H_
12 
13 #ifdef __I386__
14 #include <common.h>
15 #include <asm/io.h>
16 #define in8(p) inb(p)
17 #define out8(p,v) outb(v,p)
18 #endif
19 
20 /* defines */
21 
22 #define I8042_DATA_REG      (CONFIG_SYS_ISA_IO + 0x0060)    /* keyboard i/o buffer */
23 #define I8042_STATUS_REG    (CONFIG_SYS_ISA_IO + 0x0064)    /* keyboard status read */
24 #define I8042_COMMAND_REG   (CONFIG_SYS_ISA_IO + 0x0064)    /* keyboard ctrl write */
25 
26 enum {
27 	/* Output register (I8042_DATA_REG) has data for system */
28 	I8042_STATUS_OUT_DATA	= 1 << 0,
29 	I8042_STATUS_IN_DATA	= 1 << 1,
30 };
31 
32 #define KBD_US              0        /* default US layout */
33 #define KBD_GER             1        /* german layout */
34 
35 #define KBD_TIMEOUT         1000     /* 1 sec */
36 #define KBD_RESET_TRIES     3
37 
38 #define AS                  0        /* normal character index */
39 #define SH                  1        /* shift index */
40 #define CN                  2        /* control index */
41 #define NM                  3        /* numeric lock index */
42 #define AK                  4        /* right alt key */
43 #define CP                  5        /* capslock index */
44 #define ST                  6        /* stop output index */
45 #define EX                  7        /* extended code index */
46 #define ES                  8        /* escape and extended code index */
47 
48 #define NORMAL              0x0000    /* normal key */
49 #define STP                 0x0001    /* scroll lock stop output*/
50 #define NUM                 0x0002    /* numeric lock */
51 #define CAPS                0x0004    /* capslock */
52 #define SHIFT               0x0008    /* shift */
53 #define CTRL                0x0010    /* control*/
54 #define EXT                 0x0020    /* extended scan code 0xe0 */
55 #define ESC                 0x0040    /* escape key press */
56 #define E1                  0x0080    /* extended scan code 0xe1 */
57 #define BRK                 0x0100    /* make break flag for keyboard */
58 #define ALT                 0x0200    /* right alt */
59 
60 /* exports */
61 
62 /**
63  * Flush all buffer from keyboard controller to host.
64  */
65 void i8042_flush(void);
66 
67 /**
68  * Disables the keyboard so that key strokes no longer generate scancodes to
69  * the host.
70  *
71  * @return 0 if ok, -1 if keyboard input was found while disabling
72  */
73 int i8042_disable(void);
74 
75 struct stdio_dev;
76 
77 int i8042_kbd_init(void);
78 int i8042_tstc(struct stdio_dev *dev);
79 int i8042_getc(struct stdio_dev *dev);
80 
81 #endif /* _I8042_H_ */
82