xref: /linux/arch/sparc/include/uapi/asm/envctrl.h (revision 498495dba268b20e8eadd7fe93c140c68b6cc9d2)
1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
2 /*
3  *
4  * envctrl.h: Definitions for access to the i2c environment
5  *            monitoring on Ultrasparc systems.
6  *
7  * Copyright (C) 1998  Eddie C. Dost  (ecd@skynet.be)
8  * Copyright (C) 2000  Vinh Truong  (vinh.truong@eng.sun.com)
9  * VT - Add all ioctl commands and environment status definitions
10  * VT - Add application note
11  */
12 #ifndef _SPARC64_ENVCTRL_H
13 #define _SPARC64_ENVCTRL_H 1
14 
15 #include <linux/ioctl.h>
16 
17 /* Application note:
18  *
19  * The driver supports 4 operations: open(), close(), ioctl(), read()
20  * The device name is /dev/envctrl.
21  * Below is sample usage:
22  *
23  *	fd = open("/dev/envtrl", O_RDONLY);
24  *	if (ioctl(fd, ENVCTRL_READ_SHUTDOWN_TEMPERATURE, 0) < 0)
25  *		printf("error\n");
26  *	ret = read(fd, buf, 10);
27  *	close(fd);
28  *
29  * Notice in the case of cpu voltage and temperature, the default is
30  * cpu0.  If we need to know the info of cpu1, cpu2, cpu3, we need to
31  * pass in cpu number in ioctl() last parameter.  For example, to
32  * get the voltage of cpu2:
33  *
34  *	ioctlbuf[0] = 2;
35  *	if (ioctl(fd, ENVCTRL_READ_CPU_VOLTAGE, ioctlbuf) < 0)
36  *		printf("error\n");
37  *	ret = read(fd, buf, 10);
38  *
39  * All the return values are in ascii.  So check read return value
40  * and do appropriate conversions in your application.
41  */
42 
43 /* IOCTL commands */
44 
45 /* Note: these commands reflect possible monitor features.
46  * Some boards choose to support some of the features only.
47  */
48 #define ENVCTRL_RD_CPU_TEMPERATURE	_IOR('p', 0x40, int)
49 #define ENVCTRL_RD_CPU_VOLTAGE		_IOR('p', 0x41, int)
50 #define ENVCTRL_RD_FAN_STATUS		_IOR('p', 0x42, int)
51 #define ENVCTRL_RD_WARNING_TEMPERATURE	_IOR('p', 0x43, int)
52 #define ENVCTRL_RD_SHUTDOWN_TEMPERATURE	_IOR('p', 0x44, int)
53 #define ENVCTRL_RD_VOLTAGE_STATUS	_IOR('p', 0x45, int)
54 #define ENVCTRL_RD_SCSI_TEMPERATURE	_IOR('p', 0x46, int)
55 #define ENVCTRL_RD_ETHERNET_TEMPERATURE	_IOR('p', 0x47, int)
56 #define ENVCTRL_RD_MTHRBD_TEMPERATURE	_IOR('p', 0x48, int)
57 
58 #define ENVCTRL_RD_GLOBALADDRESS	_IOR('p', 0x49, int)
59 
60 /* Read return values for a voltage status request. */
61 #define ENVCTRL_VOLTAGE_POWERSUPPLY_GOOD	0x01
62 #define ENVCTRL_VOLTAGE_BAD			0x02
63 #define ENVCTRL_POWERSUPPLY_BAD			0x03
64 #define ENVCTRL_VOLTAGE_POWERSUPPLY_BAD		0x04
65 
66 /* Read return values for a fan status request.
67  * A failure match means either the fan fails or
68  * the fan is not connected.  Some boards have optional
69  * connectors to connect extra fans.
70  *
71  * There are maximum 8 monitor fans.  Some are cpu fans
72  * some are system fans.  The mask below only indicates
73  * fan by order number.
74  * Below is a sample application:
75  *
76  *	if (ioctl(fd, ENVCTRL_READ_FAN_STATUS, 0) < 0) {
77  *		printf("ioctl fan failed\n");
78  *	}
79  *	if (read(fd, rslt, 1) <= 0) {
80  *		printf("error or fan not monitored\n");
81  *	} else {
82  *		if (rslt[0] == ENVCTRL_ALL_FANS_GOOD) {
83  *			printf("all fans good\n");
84  *	} else if (rslt[0] == ENVCTRL_ALL_FANS_BAD) {
85  *		printf("all fans bad\n");
86  *	} else {
87  *		if (rslt[0] & ENVCTRL_FAN0_FAILURE_MASK) {
88  *			printf("fan 0 failed or not connected\n");
89  *	}
90  *	......
91  */
92 
93 #define ENVCTRL_ALL_FANS_GOOD			0x00
94 #define ENVCTRL_FAN0_FAILURE_MASK		0x01
95 #define ENVCTRL_FAN1_FAILURE_MASK		0x02
96 #define ENVCTRL_FAN2_FAILURE_MASK		0x04
97 #define ENVCTRL_FAN3_FAILURE_MASK		0x08
98 #define ENVCTRL_FAN4_FAILURE_MASK		0x10
99 #define ENVCTRL_FAN5_FAILURE_MASK		0x20
100 #define ENVCTRL_FAN6_FAILURE_MASK		0x40
101 #define ENVCTRL_FAN7_FAILURE_MASK		0x80
102 #define ENVCTRL_ALL_FANS_BAD 			0xFF
103 
104 #endif /* !(_SPARC64_ENVCTRL_H) */
105