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