arch/sparc/include/uapi/asm/envctrl.h

   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) */