| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame^] | 1 | /* $Id: envctrl.h,v 1.3 2000/11/03 00:37:40 davem Exp $ |
| 2 | * |
| 3 | * envctrl.h: Definitions for access to the i2c environment |
| 4 | * monitoring on Ultrasparc systems. |
| 5 | * |
| 6 | * Copyright (C) 1998 Eddie C. Dost (ecd@skynet.be) |
| 7 | * Copyright (C) 2000 Vinh Truong (vinh.truong@eng.sun.com) |
| 8 | * VT - Add all ioctl commands and environment status definitions |
| 9 | * VT - Add application note |
| 10 | */ |
| 11 | #ifndef _SPARC64_ENVCTRL_H |
| 12 | #define _SPARC64_ENVCTRL_H 1 |
| 13 | |
| 14 | #include <linux/ioctl.h> |
| 15 | |
| 16 | /* Application note: |
| 17 | * |
| 18 | * The driver supports 4 operations: open(), close(), ioctl(), read() |
| 19 | * The device name is /dev/envctrl. |
| 20 | * Below is sample usage: |
| 21 | * |
| 22 | * fd = open("/dev/envtrl", O_RDONLY); |
| 23 | * if (ioctl(fd, ENVCTRL_READ_SHUTDOWN_TEMPERATURE, 0) < 0) |
| 24 | * printf("error\n"); |
| 25 | * ret = read(fd, buf, 10); |
| 26 | * close(fd); |
| 27 | * |
| 28 | * Notice in the case of cpu voltage and temperature, the default is |
| 29 | * cpu0. If we need to know the info of cpu1, cpu2, cpu3, we need to |
| 30 | * pass in cpu number in ioctl() last parameter. For example, to |
| 31 | * get the voltage of cpu2: |
| 32 | * |
| 33 | * ioctlbuf[0] = 2; |
| 34 | * if (ioctl(fd, ENVCTRL_READ_CPU_VOLTAGE, ioctlbuf) < 0) |
| 35 | * printf("error\n"); |
| 36 | * ret = read(fd, buf, 10); |
| 37 | * |
| 38 | * All the return values are in ascii. So check read return value |
| 39 | * and do appropriate conversions in your application. |
| 40 | */ |
| 41 | |
| 42 | /* IOCTL commands */ |
| 43 | |
| 44 | /* Note: these commands reflect possible monitor features. |
| 45 | * Some boards choose to support some of the features only. |
| 46 | */ |
| 47 | #define ENVCTRL_RD_CPU_TEMPERATURE _IOR('p', 0x40, int) |
| 48 | #define ENVCTRL_RD_CPU_VOLTAGE _IOR('p', 0x41, int) |
| 49 | #define ENVCTRL_RD_FAN_STATUS _IOR('p', 0x42, int) |
| 50 | #define ENVCTRL_RD_WARNING_TEMPERATURE _IOR('p', 0x43, int) |
| 51 | #define ENVCTRL_RD_SHUTDOWN_TEMPERATURE _IOR('p', 0x44, int) |
| 52 | #define ENVCTRL_RD_VOLTAGE_STATUS _IOR('p', 0x45, int) |
| 53 | #define ENVCTRL_RD_SCSI_TEMPERATURE _IOR('p', 0x46, int) |
| 54 | #define ENVCTRL_RD_ETHERNET_TEMPERATURE _IOR('p', 0x47, int) |
| 55 | #define ENVCTRL_RD_MTHRBD_TEMPERATURE _IOR('p', 0x48, int) |
| 56 | |
| 57 | #define ENVCTRL_RD_GLOBALADDRESS _IOR('p', 0x49, int) |
| 58 | |
| 59 | /* Read return values for a voltage status request. */ |
| 60 | #define ENVCTRL_VOLTAGE_POWERSUPPLY_GOOD 0x01 |
| 61 | #define ENVCTRL_VOLTAGE_BAD 0x02 |
| 62 | #define ENVCTRL_POWERSUPPLY_BAD 0x03 |
| 63 | #define ENVCTRL_VOLTAGE_POWERSUPPLY_BAD 0x04 |
| 64 | |
| 65 | /* Read return values for a fan status request. |
| 66 | * A failure match means either the fan fails or |
| 67 | * the fan is not connected. Some boards have optional |
| 68 | * connectors to connect extra fans. |
| 69 | * |
| 70 | * There are maximum 8 monitor fans. Some are cpu fans |
| 71 | * some are system fans. The mask below only indicates |
| 72 | * fan by order number. |
| 73 | * Below is a sample application: |
| 74 | * |
| 75 | * if (ioctl(fd, ENVCTRL_READ_FAN_STATUS, 0) < 0) { |
| 76 | * printf("ioctl fan failed\n"); |
| 77 | * } |
| 78 | * if (read(fd, rslt, 1) <= 0) { |
| 79 | * printf("error or fan not monitored\n"); |
| 80 | * } else { |
| 81 | * if (rslt[0] == ENVCTRL_ALL_FANS_GOOD) { |
| 82 | * printf("all fans good\n"); |
| 83 | * } else if (rslt[0] == ENVCTRL_ALL_FANS_BAD) { |
| 84 | * printf("all fans bad\n"); |
| 85 | * } else { |
| 86 | * if (rslt[0] & ENVCTRL_FAN0_FAILURE_MASK) { |
| 87 | * printf("fan 0 failed or not connected\n"); |
| 88 | * } |
| 89 | * ...... |
| 90 | */ |
| 91 | |
| 92 | #define ENVCTRL_ALL_FANS_GOOD 0x00 |
| 93 | #define ENVCTRL_FAN0_FAILURE_MASK 0x01 |
| 94 | #define ENVCTRL_FAN1_FAILURE_MASK 0x02 |
| 95 | #define ENVCTRL_FAN2_FAILURE_MASK 0x04 |
| 96 | #define ENVCTRL_FAN3_FAILURE_MASK 0x08 |
| 97 | #define ENVCTRL_FAN4_FAILURE_MASK 0x10 |
| 98 | #define ENVCTRL_FAN5_FAILURE_MASK 0x20 |
| 99 | #define ENVCTRL_FAN6_FAILURE_MASK 0x40 |
| 100 | #define ENVCTRL_FAN7_FAILURE_MASK 0x80 |
| 101 | #define ENVCTRL_ALL_FANS_BAD 0xFF |
| 102 | |
| 103 | #endif /* !(_SPARC64_ENVCTRL_H) */ |