xref: /openbmc/linux/drivers/input/serio/i8042.h (revision fdd7c961)
1 /* SPDX-License-Identifier: GPL-2.0-only */
2 #ifndef _I8042_H
3 #define _I8042_H
4 
5 
6 /*
7  *  Copyright (c) 1999-2002 Vojtech Pavlik
8  */
9 
10 /*
11  * Arch-dependent inline functions and defines.
12  */
13 
14 #if defined(CONFIG_MACH_JAZZ)
15 #include "i8042-jazzio.h"
16 #elif defined(CONFIG_SGI_HAS_I8042)
17 #include "i8042-ip22io.h"
18 #elif defined(CONFIG_SNI_RM)
19 #include "i8042-snirm.h"
20 #elif defined(CONFIG_SPARC)
21 #include "i8042-sparcio.h"
22 #elif defined(CONFIG_X86) || defined(CONFIG_IA64) || defined(CONFIG_LOONGARCH)
23 #include "i8042-acpipnpio.h"
24 #else
25 #include "i8042-io.h"
26 #endif
27 
28 /*
29  * This is in 50us units, the time we wait for the i8042 to react. This
30  * has to be long enough for the i8042 itself to timeout on sending a byte
31  * to a non-existent mouse.
32  */
33 
34 #define I8042_CTL_TIMEOUT	10000
35 
36 /*
37  * Return codes.
38  */
39 
40 #define I8042_RET_CTL_TEST	0x55
41 
42 /*
43  * Expected maximum internal i8042 buffer size. This is used for flushing
44  * the i8042 buffers.
45  */
46 
47 #define I8042_BUFFER_SIZE	16
48 
49 /*
50  * Number of AUX ports on controllers supporting active multiplexing
51  * specification
52  */
53 
54 #define I8042_NUM_MUX_PORTS	4
55 
56 /*
57  * Debug.
58  */
59 
60 #ifdef DEBUG
61 static unsigned long i8042_start_time;
62 #define dbg_init() do { i8042_start_time = jiffies; } while (0)
63 #define dbg(format, arg...)							\
64 	do {									\
65 		if (i8042_debug)						\
66 			printk(KERN_DEBUG KBUILD_MODNAME ": [%d] " format,	\
67 			       (int) (jiffies - i8042_start_time), ##arg);	\
68 	} while (0)
69 
70 #define filter_dbg(filter, data, format, args...)		\
71 	do {							\
72 		if (!i8042_debug)				\
73 			break;					\
74 								\
75 		if (!filter || i8042_unmask_kbd_data)		\
76 			dbg("%02x " format, data, ##args);	\
77 		else						\
78 			dbg("** " format, ##args);		\
79 	} while (0)
80 #else
81 #define dbg_init() do { } while (0)
82 #define dbg(format, arg...)							\
83 	do {									\
84 		if (0)								\
85 			printk(KERN_DEBUG pr_fmt(format), ##arg);		\
86 	} while (0)
87 
88 #define filter_dbg(filter, data, format, args...) do { } while (0)
89 #endif
90 
91 #endif /* _I8042_H */
92