Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * i8k.c -- Linux driver for accessing the SMM BIOS on Dell laptops. |
| 3 | * See http://www.debian.org/~dz/i8k/ for more information |
| 4 | * and for latest version of this driver. |
| 5 | * |
| 6 | * Copyright (C) 2001 Massimo Dal Zotto <dz@debian.org> |
| 7 | * |
| 8 | * This program is free software; you can redistribute it and/or modify it |
| 9 | * under the terms of the GNU General Public License as published by the |
| 10 | * Free Software Foundation; either version 2, or (at your option) any |
| 11 | * later version. |
| 12 | * |
| 13 | * This program is distributed in the hope that it will be useful, but |
| 14 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 16 | * General Public License for more details. |
| 17 | */ |
| 18 | |
| 19 | #include <linux/module.h> |
| 20 | #include <linux/types.h> |
| 21 | #include <linux/init.h> |
| 22 | #include <linux/proc_fs.h> |
Dmitry Torokhov | 352f8f8 | 2005-06-25 14:54:26 -0700 | [diff] [blame] | 23 | #include <linux/seq_file.h> |
Dmitry Torokhov | e70c9d5 | 2005-06-25 14:54:25 -0700 | [diff] [blame] | 24 | #include <linux/dmi.h> |
Alexey Dobriyan | 7e80d0d | 2007-05-08 00:28:59 -0700 | [diff] [blame] | 25 | #include <linux/capability.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 26 | #include <asm/uaccess.h> |
| 27 | #include <asm/io.h> |
| 28 | |
| 29 | #include <linux/i8k.h> |
| 30 | |
Dmitry Torokhov | 352f8f8 | 2005-06-25 14:54:26 -0700 | [diff] [blame] | 31 | #define I8K_VERSION "1.14 21/02/2005" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 32 | |
| 33 | #define I8K_SMM_FN_STATUS 0x0025 |
| 34 | #define I8K_SMM_POWER_STATUS 0x0069 |
| 35 | #define I8K_SMM_SET_FAN 0x01a3 |
| 36 | #define I8K_SMM_GET_FAN 0x00a3 |
| 37 | #define I8K_SMM_GET_SPEED 0x02a3 |
| 38 | #define I8K_SMM_GET_TEMP 0x10a3 |
Dmitry Torokhov | 7e0fa31 | 2005-06-25 14:54:28 -0700 | [diff] [blame] | 39 | #define I8K_SMM_GET_DELL_SIG1 0xfea3 |
| 40 | #define I8K_SMM_GET_DELL_SIG2 0xffa3 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 41 | #define I8K_SMM_BIOS_VERSION 0x00a6 |
| 42 | |
| 43 | #define I8K_FAN_MULT 30 |
| 44 | #define I8K_MAX_TEMP 127 |
| 45 | |
| 46 | #define I8K_FN_NONE 0x00 |
| 47 | #define I8K_FN_UP 0x01 |
| 48 | #define I8K_FN_DOWN 0x02 |
| 49 | #define I8K_FN_MUTE 0x04 |
| 50 | #define I8K_FN_MASK 0x07 |
| 51 | #define I8K_FN_SHIFT 8 |
| 52 | |
| 53 | #define I8K_POWER_AC 0x05 |
| 54 | #define I8K_POWER_BATTERY 0x01 |
| 55 | |
| 56 | #define I8K_TEMPERATURE_BUG 1 |
| 57 | |
Dmitry Torokhov | e70c9d5 | 2005-06-25 14:54:25 -0700 | [diff] [blame] | 58 | static char bios_version[4]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 59 | |
| 60 | MODULE_AUTHOR("Massimo Dal Zotto (dz@debian.org)"); |
| 61 | MODULE_DESCRIPTION("Driver for accessing SMM BIOS on Dell laptops"); |
| 62 | MODULE_LICENSE("GPL"); |
| 63 | |
| 64 | static int force; |
| 65 | module_param(force, bool, 0); |
| 66 | MODULE_PARM_DESC(force, "Force loading without checking for supported models"); |
| 67 | |
Dmitry Torokhov | e70c9d5 | 2005-06-25 14:54:25 -0700 | [diff] [blame] | 68 | static int ignore_dmi; |
| 69 | module_param(ignore_dmi, bool, 0); |
| 70 | MODULE_PARM_DESC(ignore_dmi, "Continue probing hardware even if DMI data does not match"); |
| 71 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 72 | static int restricted; |
| 73 | module_param(restricted, bool, 0); |
| 74 | MODULE_PARM_DESC(restricted, "Allow fan control if SYS_ADMIN capability set"); |
| 75 | |
| 76 | static int power_status; |
| 77 | module_param(power_status, bool, 0600); |
| 78 | MODULE_PARM_DESC(power_status, "Report power status in /proc/i8k"); |
| 79 | |
Dmitry Torokhov | 352f8f8 | 2005-06-25 14:54:26 -0700 | [diff] [blame] | 80 | static int i8k_open_fs(struct inode *inode, struct file *file); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 81 | static int i8k_ioctl(struct inode *, struct file *, unsigned int, |
| 82 | unsigned long); |
| 83 | |
Arjan van de Ven | 62322d2 | 2006-07-03 00:24:21 -0700 | [diff] [blame] | 84 | static const struct file_operations i8k_fops = { |
Dmitry Torokhov | 352f8f8 | 2005-06-25 14:54:26 -0700 | [diff] [blame] | 85 | .open = i8k_open_fs, |
| 86 | .read = seq_read, |
| 87 | .llseek = seq_lseek, |
| 88 | .release = single_release, |
| 89 | .ioctl = i8k_ioctl, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 90 | }; |
| 91 | |
Dmitry Torokhov | 8378b92 | 2005-06-25 14:54:27 -0700 | [diff] [blame] | 92 | struct smm_regs { |
Dmitry Torokhov | dec63ec | 2005-06-25 14:54:23 -0700 | [diff] [blame] | 93 | unsigned int eax; |
| 94 | unsigned int ebx __attribute__ ((packed)); |
| 95 | unsigned int ecx __attribute__ ((packed)); |
| 96 | unsigned int edx __attribute__ ((packed)); |
| 97 | unsigned int esi __attribute__ ((packed)); |
| 98 | unsigned int edi __attribute__ ((packed)); |
Dmitry Torokhov | 8378b92 | 2005-06-25 14:54:27 -0700 | [diff] [blame] | 99 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 100 | |
Jeff Garzik | 1855256 | 2007-10-03 15:15:40 -0400 | [diff] [blame] | 101 | static inline const char *i8k_get_dmi_data(int field) |
Dmitry Torokhov | e70c9d5 | 2005-06-25 14:54:25 -0700 | [diff] [blame] | 102 | { |
Jeff Garzik | 1855256 | 2007-10-03 15:15:40 -0400 | [diff] [blame] | 103 | const char *dmi_data = dmi_get_system_info(field); |
Dmitry Torokhov | 4f00555 | 2005-11-12 00:55:15 -0500 | [diff] [blame] | 104 | |
| 105 | return dmi_data && *dmi_data ? dmi_data : "?"; |
Dmitry Torokhov | e70c9d5 | 2005-06-25 14:54:25 -0700 | [diff] [blame] | 106 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 107 | |
| 108 | /* |
| 109 | * Call the System Management Mode BIOS. Code provided by Jonathan Buzzard. |
| 110 | */ |
Dmitry Torokhov | 8378b92 | 2005-06-25 14:54:27 -0700 | [diff] [blame] | 111 | static int i8k_smm(struct smm_regs *regs) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 112 | { |
Dmitry Torokhov | dec63ec | 2005-06-25 14:54:23 -0700 | [diff] [blame] | 113 | int rc; |
| 114 | int eax = regs->eax; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 115 | |
Dmitry Torokhov | dec63ec | 2005-06-25 14:54:23 -0700 | [diff] [blame] | 116 | asm("pushl %%eax\n\t" |
| 117 | "movl 0(%%eax),%%edx\n\t" |
| 118 | "push %%edx\n\t" |
| 119 | "movl 4(%%eax),%%ebx\n\t" |
| 120 | "movl 8(%%eax),%%ecx\n\t" |
| 121 | "movl 12(%%eax),%%edx\n\t" |
| 122 | "movl 16(%%eax),%%esi\n\t" |
| 123 | "movl 20(%%eax),%%edi\n\t" |
| 124 | "popl %%eax\n\t" |
| 125 | "out %%al,$0xb2\n\t" |
| 126 | "out %%al,$0x84\n\t" |
| 127 | "xchgl %%eax,(%%esp)\n\t" |
| 128 | "movl %%ebx,4(%%eax)\n\t" |
| 129 | "movl %%ecx,8(%%eax)\n\t" |
| 130 | "movl %%edx,12(%%eax)\n\t" |
| 131 | "movl %%esi,16(%%eax)\n\t" |
| 132 | "movl %%edi,20(%%eax)\n\t" |
| 133 | "popl %%edx\n\t" |
| 134 | "movl %%edx,0(%%eax)\n\t" |
| 135 | "lahf\n\t" |
| 136 | "shrl $8,%%eax\n\t" |
| 137 | "andl $1,%%eax\n":"=a"(rc) |
| 138 | : "a"(regs) |
| 139 | : "%ebx", "%ecx", "%edx", "%esi", "%edi", "memory"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 140 | |
Dmitry Torokhov | 8378b92 | 2005-06-25 14:54:27 -0700 | [diff] [blame] | 141 | if (rc != 0 || (regs->eax & 0xffff) == 0xffff || regs->eax == eax) |
Dmitry Torokhov | dec63ec | 2005-06-25 14:54:23 -0700 | [diff] [blame] | 142 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 143 | |
Dmitry Torokhov | dec63ec | 2005-06-25 14:54:23 -0700 | [diff] [blame] | 144 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 145 | } |
| 146 | |
| 147 | /* |
| 148 | * Read the bios version. Return the version as an integer corresponding |
| 149 | * to the ascii value, for example "A17" is returned as 0x00413137. |
| 150 | */ |
| 151 | static int i8k_get_bios_version(void) |
| 152 | { |
Dmitry Torokhov | 8378b92 | 2005-06-25 14:54:27 -0700 | [diff] [blame] | 153 | struct smm_regs regs = { .eax = I8K_SMM_BIOS_VERSION, }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 154 | |
Dmitry Torokhov | 8378b92 | 2005-06-25 14:54:27 -0700 | [diff] [blame] | 155 | return i8k_smm(®s) ? : regs.eax; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 156 | } |
| 157 | |
| 158 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 159 | * Read the Fn key status. |
| 160 | */ |
| 161 | static int i8k_get_fn_status(void) |
| 162 | { |
Dmitry Torokhov | 8378b92 | 2005-06-25 14:54:27 -0700 | [diff] [blame] | 163 | struct smm_regs regs = { .eax = I8K_SMM_FN_STATUS, }; |
Dmitry Torokhov | dec63ec | 2005-06-25 14:54:23 -0700 | [diff] [blame] | 164 | int rc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 165 | |
Dmitry Torokhov | 8378b92 | 2005-06-25 14:54:27 -0700 | [diff] [blame] | 166 | if ((rc = i8k_smm(®s)) < 0) |
Dmitry Torokhov | dec63ec | 2005-06-25 14:54:23 -0700 | [diff] [blame] | 167 | return rc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 168 | |
Dmitry Torokhov | dec63ec | 2005-06-25 14:54:23 -0700 | [diff] [blame] | 169 | switch ((regs.eax >> I8K_FN_SHIFT) & I8K_FN_MASK) { |
| 170 | case I8K_FN_UP: |
| 171 | return I8K_VOL_UP; |
| 172 | case I8K_FN_DOWN: |
| 173 | return I8K_VOL_DOWN; |
| 174 | case I8K_FN_MUTE: |
| 175 | return I8K_VOL_MUTE; |
| 176 | default: |
| 177 | return 0; |
| 178 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 179 | } |
| 180 | |
| 181 | /* |
| 182 | * Read the power status. |
| 183 | */ |
| 184 | static int i8k_get_power_status(void) |
| 185 | { |
Dmitry Torokhov | 8378b92 | 2005-06-25 14:54:27 -0700 | [diff] [blame] | 186 | struct smm_regs regs = { .eax = I8K_SMM_POWER_STATUS, }; |
Dmitry Torokhov | dec63ec | 2005-06-25 14:54:23 -0700 | [diff] [blame] | 187 | int rc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 188 | |
Dmitry Torokhov | 8378b92 | 2005-06-25 14:54:27 -0700 | [diff] [blame] | 189 | if ((rc = i8k_smm(®s)) < 0) |
Dmitry Torokhov | dec63ec | 2005-06-25 14:54:23 -0700 | [diff] [blame] | 190 | return rc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 191 | |
Dmitry Torokhov | 8378b92 | 2005-06-25 14:54:27 -0700 | [diff] [blame] | 192 | return (regs.eax & 0xff) == I8K_POWER_AC ? I8K_AC : I8K_BATTERY; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 193 | } |
| 194 | |
| 195 | /* |
| 196 | * Read the fan status. |
| 197 | */ |
| 198 | static int i8k_get_fan_status(int fan) |
| 199 | { |
Dmitry Torokhov | 8378b92 | 2005-06-25 14:54:27 -0700 | [diff] [blame] | 200 | struct smm_regs regs = { .eax = I8K_SMM_GET_FAN, }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 201 | |
Dmitry Torokhov | dec63ec | 2005-06-25 14:54:23 -0700 | [diff] [blame] | 202 | regs.ebx = fan & 0xff; |
Dmitry Torokhov | 8378b92 | 2005-06-25 14:54:27 -0700 | [diff] [blame] | 203 | return i8k_smm(®s) ? : regs.eax & 0xff; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 204 | } |
| 205 | |
| 206 | /* |
| 207 | * Read the fan speed in RPM. |
| 208 | */ |
| 209 | static int i8k_get_fan_speed(int fan) |
| 210 | { |
Dmitry Torokhov | 8378b92 | 2005-06-25 14:54:27 -0700 | [diff] [blame] | 211 | struct smm_regs regs = { .eax = I8K_SMM_GET_SPEED, }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 212 | |
Dmitry Torokhov | dec63ec | 2005-06-25 14:54:23 -0700 | [diff] [blame] | 213 | regs.ebx = fan & 0xff; |
Dmitry Torokhov | 8378b92 | 2005-06-25 14:54:27 -0700 | [diff] [blame] | 214 | return i8k_smm(®s) ? : (regs.eax & 0xffff) * I8K_FAN_MULT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 215 | } |
| 216 | |
| 217 | /* |
| 218 | * Set the fan speed (off, low, high). Returns the new fan status. |
| 219 | */ |
| 220 | static int i8k_set_fan(int fan, int speed) |
| 221 | { |
Dmitry Torokhov | 8378b92 | 2005-06-25 14:54:27 -0700 | [diff] [blame] | 222 | struct smm_regs regs = { .eax = I8K_SMM_SET_FAN, }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 223 | |
Dmitry Torokhov | dec63ec | 2005-06-25 14:54:23 -0700 | [diff] [blame] | 224 | speed = (speed < 0) ? 0 : ((speed > I8K_FAN_MAX) ? I8K_FAN_MAX : speed); |
Dmitry Torokhov | dec63ec | 2005-06-25 14:54:23 -0700 | [diff] [blame] | 225 | regs.ebx = (fan & 0xff) | (speed << 8); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 226 | |
Dmitry Torokhov | 8378b92 | 2005-06-25 14:54:27 -0700 | [diff] [blame] | 227 | return i8k_smm(®s) ? : i8k_get_fan_status(fan); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 228 | } |
| 229 | |
| 230 | /* |
| 231 | * Read the cpu temperature. |
| 232 | */ |
Dmitry Torokhov | 7e0fa31 | 2005-06-25 14:54:28 -0700 | [diff] [blame] | 233 | static int i8k_get_temp(int sensor) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 234 | { |
Dmitry Torokhov | 8378b92 | 2005-06-25 14:54:27 -0700 | [diff] [blame] | 235 | struct smm_regs regs = { .eax = I8K_SMM_GET_TEMP, }; |
Dmitry Torokhov | dec63ec | 2005-06-25 14:54:23 -0700 | [diff] [blame] | 236 | int rc; |
| 237 | int temp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 238 | |
| 239 | #ifdef I8K_TEMPERATURE_BUG |
Dmitry Torokhov | 8378b92 | 2005-06-25 14:54:27 -0700 | [diff] [blame] | 240 | static int prev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 241 | #endif |
Dmitry Torokhov | 7e0fa31 | 2005-06-25 14:54:28 -0700 | [diff] [blame] | 242 | regs.ebx = sensor & 0xff; |
Dmitry Torokhov | 8378b92 | 2005-06-25 14:54:27 -0700 | [diff] [blame] | 243 | if ((rc = i8k_smm(®s)) < 0) |
Dmitry Torokhov | dec63ec | 2005-06-25 14:54:23 -0700 | [diff] [blame] | 244 | return rc; |
Dmitry Torokhov | 8378b92 | 2005-06-25 14:54:27 -0700 | [diff] [blame] | 245 | |
Dmitry Torokhov | dec63ec | 2005-06-25 14:54:23 -0700 | [diff] [blame] | 246 | temp = regs.eax & 0xff; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 247 | |
| 248 | #ifdef I8K_TEMPERATURE_BUG |
Dmitry Torokhov | dec63ec | 2005-06-25 14:54:23 -0700 | [diff] [blame] | 249 | /* |
| 250 | * Sometimes the temperature sensor returns 0x99, which is out of range. |
| 251 | * In this case we return (once) the previous cached value. For example: |
| 252 | # 1003655137 00000058 00005a4b |
| 253 | # 1003655138 00000099 00003a80 <--- 0x99 = 153 degrees |
| 254 | # 1003655139 00000054 00005c52 |
| 255 | */ |
| 256 | if (temp > I8K_MAX_TEMP) { |
| 257 | temp = prev; |
| 258 | prev = I8K_MAX_TEMP; |
| 259 | } else { |
| 260 | prev = temp; |
| 261 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 262 | #endif |
| 263 | |
Dmitry Torokhov | dec63ec | 2005-06-25 14:54:23 -0700 | [diff] [blame] | 264 | return temp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 265 | } |
| 266 | |
Dmitry Torokhov | 7e0fa31 | 2005-06-25 14:54:28 -0700 | [diff] [blame] | 267 | static int i8k_get_dell_signature(int req_fn) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 268 | { |
Dmitry Torokhov | 7e0fa31 | 2005-06-25 14:54:28 -0700 | [diff] [blame] | 269 | struct smm_regs regs = { .eax = req_fn, }; |
Dmitry Torokhov | dec63ec | 2005-06-25 14:54:23 -0700 | [diff] [blame] | 270 | int rc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 271 | |
Dmitry Torokhov | 8378b92 | 2005-06-25 14:54:27 -0700 | [diff] [blame] | 272 | if ((rc = i8k_smm(®s)) < 0) |
Dmitry Torokhov | dec63ec | 2005-06-25 14:54:23 -0700 | [diff] [blame] | 273 | return rc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 274 | |
Dmitry Torokhov | 8378b92 | 2005-06-25 14:54:27 -0700 | [diff] [blame] | 275 | return regs.eax == 1145651527 && regs.edx == 1145392204 ? 0 : -1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 276 | } |
| 277 | |
| 278 | static int i8k_ioctl(struct inode *ip, struct file *fp, unsigned int cmd, |
| 279 | unsigned long arg) |
| 280 | { |
Dmitry Torokhov | e70c9d5 | 2005-06-25 14:54:25 -0700 | [diff] [blame] | 281 | int val = 0; |
Dmitry Torokhov | dec63ec | 2005-06-25 14:54:23 -0700 | [diff] [blame] | 282 | int speed; |
| 283 | unsigned char buff[16]; |
| 284 | int __user *argp = (int __user *)arg; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 285 | |
Dmitry Torokhov | dec63ec | 2005-06-25 14:54:23 -0700 | [diff] [blame] | 286 | if (!argp) |
| 287 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 288 | |
Dmitry Torokhov | dec63ec | 2005-06-25 14:54:23 -0700 | [diff] [blame] | 289 | switch (cmd) { |
| 290 | case I8K_BIOS_VERSION: |
| 291 | val = i8k_get_bios_version(); |
| 292 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 293 | |
Dmitry Torokhov | dec63ec | 2005-06-25 14:54:23 -0700 | [diff] [blame] | 294 | case I8K_MACHINE_ID: |
| 295 | memset(buff, 0, 16); |
Dmitry Torokhov | e70c9d5 | 2005-06-25 14:54:25 -0700 | [diff] [blame] | 296 | strlcpy(buff, i8k_get_dmi_data(DMI_PRODUCT_SERIAL), sizeof(buff)); |
Dmitry Torokhov | dec63ec | 2005-06-25 14:54:23 -0700 | [diff] [blame] | 297 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 298 | |
Dmitry Torokhov | dec63ec | 2005-06-25 14:54:23 -0700 | [diff] [blame] | 299 | case I8K_FN_STATUS: |
| 300 | val = i8k_get_fn_status(); |
| 301 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 302 | |
Dmitry Torokhov | dec63ec | 2005-06-25 14:54:23 -0700 | [diff] [blame] | 303 | case I8K_POWER_STATUS: |
| 304 | val = i8k_get_power_status(); |
| 305 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 306 | |
Dmitry Torokhov | dec63ec | 2005-06-25 14:54:23 -0700 | [diff] [blame] | 307 | case I8K_GET_TEMP: |
Dmitry Torokhov | 7e0fa31 | 2005-06-25 14:54:28 -0700 | [diff] [blame] | 308 | val = i8k_get_temp(0); |
Dmitry Torokhov | dec63ec | 2005-06-25 14:54:23 -0700 | [diff] [blame] | 309 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 310 | |
Dmitry Torokhov | dec63ec | 2005-06-25 14:54:23 -0700 | [diff] [blame] | 311 | case I8K_GET_SPEED: |
Dmitry Torokhov | 8378b92 | 2005-06-25 14:54:27 -0700 | [diff] [blame] | 312 | if (copy_from_user(&val, argp, sizeof(int))) |
Dmitry Torokhov | dec63ec | 2005-06-25 14:54:23 -0700 | [diff] [blame] | 313 | return -EFAULT; |
Dmitry Torokhov | 8378b92 | 2005-06-25 14:54:27 -0700 | [diff] [blame] | 314 | |
Dmitry Torokhov | dec63ec | 2005-06-25 14:54:23 -0700 | [diff] [blame] | 315 | val = i8k_get_fan_speed(val); |
| 316 | break; |
| 317 | |
| 318 | case I8K_GET_FAN: |
Dmitry Torokhov | 8378b92 | 2005-06-25 14:54:27 -0700 | [diff] [blame] | 319 | if (copy_from_user(&val, argp, sizeof(int))) |
Dmitry Torokhov | dec63ec | 2005-06-25 14:54:23 -0700 | [diff] [blame] | 320 | return -EFAULT; |
Dmitry Torokhov | 8378b92 | 2005-06-25 14:54:27 -0700 | [diff] [blame] | 321 | |
Dmitry Torokhov | dec63ec | 2005-06-25 14:54:23 -0700 | [diff] [blame] | 322 | val = i8k_get_fan_status(val); |
| 323 | break; |
| 324 | |
| 325 | case I8K_SET_FAN: |
Dmitry Torokhov | 8378b92 | 2005-06-25 14:54:27 -0700 | [diff] [blame] | 326 | if (restricted && !capable(CAP_SYS_ADMIN)) |
Dmitry Torokhov | dec63ec | 2005-06-25 14:54:23 -0700 | [diff] [blame] | 327 | return -EPERM; |
Dmitry Torokhov | 8378b92 | 2005-06-25 14:54:27 -0700 | [diff] [blame] | 328 | |
| 329 | if (copy_from_user(&val, argp, sizeof(int))) |
Dmitry Torokhov | dec63ec | 2005-06-25 14:54:23 -0700 | [diff] [blame] | 330 | return -EFAULT; |
Dmitry Torokhov | 8378b92 | 2005-06-25 14:54:27 -0700 | [diff] [blame] | 331 | |
| 332 | if (copy_from_user(&speed, argp + 1, sizeof(int))) |
Dmitry Torokhov | dec63ec | 2005-06-25 14:54:23 -0700 | [diff] [blame] | 333 | return -EFAULT; |
Dmitry Torokhov | 8378b92 | 2005-06-25 14:54:27 -0700 | [diff] [blame] | 334 | |
Dmitry Torokhov | dec63ec | 2005-06-25 14:54:23 -0700 | [diff] [blame] | 335 | val = i8k_set_fan(val, speed); |
| 336 | break; |
| 337 | |
| 338 | default: |
| 339 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 340 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 341 | |
Dmitry Torokhov | 8378b92 | 2005-06-25 14:54:27 -0700 | [diff] [blame] | 342 | if (val < 0) |
Dmitry Torokhov | dec63ec | 2005-06-25 14:54:23 -0700 | [diff] [blame] | 343 | return val; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 344 | |
Dmitry Torokhov | dec63ec | 2005-06-25 14:54:23 -0700 | [diff] [blame] | 345 | switch (cmd) { |
| 346 | case I8K_BIOS_VERSION: |
Dmitry Torokhov | 8378b92 | 2005-06-25 14:54:27 -0700 | [diff] [blame] | 347 | if (copy_to_user(argp, &val, 4)) |
Dmitry Torokhov | dec63ec | 2005-06-25 14:54:23 -0700 | [diff] [blame] | 348 | return -EFAULT; |
Dmitry Torokhov | 8378b92 | 2005-06-25 14:54:27 -0700 | [diff] [blame] | 349 | |
Dmitry Torokhov | dec63ec | 2005-06-25 14:54:23 -0700 | [diff] [blame] | 350 | break; |
| 351 | case I8K_MACHINE_ID: |
Dmitry Torokhov | 8378b92 | 2005-06-25 14:54:27 -0700 | [diff] [blame] | 352 | if (copy_to_user(argp, buff, 16)) |
Dmitry Torokhov | dec63ec | 2005-06-25 14:54:23 -0700 | [diff] [blame] | 353 | return -EFAULT; |
Dmitry Torokhov | 8378b92 | 2005-06-25 14:54:27 -0700 | [diff] [blame] | 354 | |
Dmitry Torokhov | dec63ec | 2005-06-25 14:54:23 -0700 | [diff] [blame] | 355 | break; |
| 356 | default: |
Dmitry Torokhov | 8378b92 | 2005-06-25 14:54:27 -0700 | [diff] [blame] | 357 | if (copy_to_user(argp, &val, sizeof(int))) |
Dmitry Torokhov | dec63ec | 2005-06-25 14:54:23 -0700 | [diff] [blame] | 358 | return -EFAULT; |
Dmitry Torokhov | 8378b92 | 2005-06-25 14:54:27 -0700 | [diff] [blame] | 359 | |
Dmitry Torokhov | dec63ec | 2005-06-25 14:54:23 -0700 | [diff] [blame] | 360 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 361 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 362 | |
Dmitry Torokhov | dec63ec | 2005-06-25 14:54:23 -0700 | [diff] [blame] | 363 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 364 | } |
| 365 | |
| 366 | /* |
| 367 | * Print the information for /proc/i8k. |
| 368 | */ |
Dmitry Torokhov | 352f8f8 | 2005-06-25 14:54:26 -0700 | [diff] [blame] | 369 | static int i8k_proc_show(struct seq_file *seq, void *offset) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 370 | { |
Dmitry Torokhov | 352f8f8 | 2005-06-25 14:54:26 -0700 | [diff] [blame] | 371 | int fn_key, cpu_temp, ac_power; |
Dmitry Torokhov | dec63ec | 2005-06-25 14:54:23 -0700 | [diff] [blame] | 372 | int left_fan, right_fan, left_speed, right_speed; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 373 | |
Jan Engelhardt | 96de0e2 | 2007-10-19 23:21:04 +0200 | [diff] [blame] | 374 | cpu_temp = i8k_get_temp(0); /* 11100 µs */ |
| 375 | left_fan = i8k_get_fan_status(I8K_FAN_LEFT); /* 580 µs */ |
| 376 | right_fan = i8k_get_fan_status(I8K_FAN_RIGHT); /* 580 µs */ |
| 377 | left_speed = i8k_get_fan_speed(I8K_FAN_LEFT); /* 580 µs */ |
| 378 | right_speed = i8k_get_fan_speed(I8K_FAN_RIGHT); /* 580 µs */ |
| 379 | fn_key = i8k_get_fn_status(); /* 750 µs */ |
Dmitry Torokhov | 8378b92 | 2005-06-25 14:54:27 -0700 | [diff] [blame] | 380 | if (power_status) |
Jan Engelhardt | 96de0e2 | 2007-10-19 23:21:04 +0200 | [diff] [blame] | 381 | ac_power = i8k_get_power_status(); /* 14700 µs */ |
Dmitry Torokhov | 8378b92 | 2005-06-25 14:54:27 -0700 | [diff] [blame] | 382 | else |
Dmitry Torokhov | dec63ec | 2005-06-25 14:54:23 -0700 | [diff] [blame] | 383 | ac_power = -1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 384 | |
Dmitry Torokhov | dec63ec | 2005-06-25 14:54:23 -0700 | [diff] [blame] | 385 | /* |
| 386 | * Info: |
| 387 | * |
| 388 | * 1) Format version (this will change if format changes) |
| 389 | * 2) BIOS version |
| 390 | * 3) BIOS machine ID |
| 391 | * 4) Cpu temperature |
| 392 | * 5) Left fan status |
| 393 | * 6) Right fan status |
| 394 | * 7) Left fan speed |
| 395 | * 8) Right fan speed |
| 396 | * 9) AC power |
| 397 | * 10) Fn Key status |
| 398 | */ |
Dmitry Torokhov | 352f8f8 | 2005-06-25 14:54:26 -0700 | [diff] [blame] | 399 | return seq_printf(seq, "%s %s %s %d %d %d %d %d %d %d\n", |
| 400 | I8K_PROC_FMT, |
| 401 | bios_version, |
Dmitry Torokhov | 4f00555 | 2005-11-12 00:55:15 -0500 | [diff] [blame] | 402 | i8k_get_dmi_data(DMI_PRODUCT_SERIAL), |
Dmitry Torokhov | 352f8f8 | 2005-06-25 14:54:26 -0700 | [diff] [blame] | 403 | cpu_temp, |
| 404 | left_fan, right_fan, left_speed, right_speed, |
| 405 | ac_power, fn_key); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 406 | } |
| 407 | |
Dmitry Torokhov | 352f8f8 | 2005-06-25 14:54:26 -0700 | [diff] [blame] | 408 | static int i8k_open_fs(struct inode *inode, struct file *file) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 409 | { |
Dmitry Torokhov | 352f8f8 | 2005-06-25 14:54:26 -0700 | [diff] [blame] | 410 | return single_open(file, i8k_proc_show, NULL); |
Dmitry Torokhov | dec63ec | 2005-06-25 14:54:23 -0700 | [diff] [blame] | 411 | } |
| 412 | |
Dmitry Torokhov | e70c9d5 | 2005-06-25 14:54:25 -0700 | [diff] [blame] | 413 | static struct dmi_system_id __initdata i8k_dmi_table[] = { |
| 414 | { |
| 415 | .ident = "Dell Inspiron", |
| 416 | .matches = { |
| 417 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Computer"), |
| 418 | DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron"), |
| 419 | }, |
| 420 | }, |
| 421 | { |
| 422 | .ident = "Dell Latitude", |
| 423 | .matches = { |
| 424 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Computer"), |
| 425 | DMI_MATCH(DMI_PRODUCT_NAME, "Latitude"), |
| 426 | }, |
| 427 | }, |
Dmitry Torokhov | 7e0fa31 | 2005-06-25 14:54:28 -0700 | [diff] [blame] | 428 | { |
| 429 | .ident = "Dell Inspiron 2", |
| 430 | .matches = { |
| 431 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), |
| 432 | DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron"), |
| 433 | }, |
| 434 | }, |
| 435 | { |
| 436 | .ident = "Dell Latitude 2", |
| 437 | .matches = { |
| 438 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), |
| 439 | DMI_MATCH(DMI_PRODUCT_NAME, "Latitude"), |
| 440 | }, |
| 441 | }, |
Dmitry Torokhov | e70c9d5 | 2005-06-25 14:54:25 -0700 | [diff] [blame] | 442 | { } |
| 443 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 444 | |
| 445 | /* |
| 446 | * Probe for the presence of a supported laptop. |
| 447 | */ |
| 448 | static int __init i8k_probe(void) |
| 449 | { |
Dmitry Torokhov | dec63ec | 2005-06-25 14:54:23 -0700 | [diff] [blame] | 450 | char buff[4]; |
| 451 | int version; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 452 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 453 | /* |
Dmitry Torokhov | dec63ec | 2005-06-25 14:54:23 -0700 | [diff] [blame] | 454 | * Get DMI information |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 455 | */ |
Dmitry Torokhov | e70c9d5 | 2005-06-25 14:54:25 -0700 | [diff] [blame] | 456 | if (!dmi_check_system(i8k_dmi_table)) { |
| 457 | if (!ignore_dmi && !force) |
| 458 | return -ENODEV; |
| 459 | |
| 460 | printk(KERN_INFO "i8k: not running on a supported Dell system.\n"); |
Dmitry Torokhov | dec63ec | 2005-06-25 14:54:23 -0700 | [diff] [blame] | 461 | printk(KERN_INFO "i8k: vendor=%s, model=%s, version=%s\n", |
Dmitry Torokhov | e70c9d5 | 2005-06-25 14:54:25 -0700 | [diff] [blame] | 462 | i8k_get_dmi_data(DMI_SYS_VENDOR), |
| 463 | i8k_get_dmi_data(DMI_PRODUCT_NAME), |
| 464 | i8k_get_dmi_data(DMI_BIOS_VERSION)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 465 | } |
Dmitry Torokhov | dec63ec | 2005-06-25 14:54:23 -0700 | [diff] [blame] | 466 | |
Dmitry Torokhov | e70c9d5 | 2005-06-25 14:54:25 -0700 | [diff] [blame] | 467 | strlcpy(bios_version, i8k_get_dmi_data(DMI_BIOS_VERSION), sizeof(bios_version)); |
| 468 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 469 | /* |
Dmitry Torokhov | dec63ec | 2005-06-25 14:54:23 -0700 | [diff] [blame] | 470 | * Get SMM Dell signature |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 471 | */ |
Dmitry Torokhov | 7e0fa31 | 2005-06-25 14:54:28 -0700 | [diff] [blame] | 472 | if (i8k_get_dell_signature(I8K_SMM_GET_DELL_SIG1) && |
| 473 | i8k_get_dell_signature(I8K_SMM_GET_DELL_SIG2)) { |
Dmitry Torokhov | e70c9d5 | 2005-06-25 14:54:25 -0700 | [diff] [blame] | 474 | printk(KERN_ERR "i8k: unable to get SMM Dell signature\n"); |
| 475 | if (!force) |
| 476 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 477 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 478 | |
Dmitry Torokhov | dec63ec | 2005-06-25 14:54:23 -0700 | [diff] [blame] | 479 | /* |
| 480 | * Get SMM BIOS version. |
| 481 | */ |
| 482 | version = i8k_get_bios_version(); |
| 483 | if (version <= 0) { |
Dmitry Torokhov | e70c9d5 | 2005-06-25 14:54:25 -0700 | [diff] [blame] | 484 | printk(KERN_WARNING "i8k: unable to get SMM BIOS version\n"); |
Dmitry Torokhov | dec63ec | 2005-06-25 14:54:23 -0700 | [diff] [blame] | 485 | } else { |
Dmitry Torokhov | dec63ec | 2005-06-25 14:54:23 -0700 | [diff] [blame] | 486 | buff[0] = (version >> 16) & 0xff; |
| 487 | buff[1] = (version >> 8) & 0xff; |
| 488 | buff[2] = (version) & 0xff; |
| 489 | buff[3] = '\0'; |
| 490 | /* |
| 491 | * If DMI BIOS version is unknown use SMM BIOS version. |
| 492 | */ |
Dmitry Torokhov | e70c9d5 | 2005-06-25 14:54:25 -0700 | [diff] [blame] | 493 | if (!dmi_get_system_info(DMI_BIOS_VERSION)) |
| 494 | strlcpy(bios_version, buff, sizeof(bios_version)); |
| 495 | |
Dmitry Torokhov | dec63ec | 2005-06-25 14:54:23 -0700 | [diff] [blame] | 496 | /* |
| 497 | * Check if the two versions match. |
| 498 | */ |
Dmitry Torokhov | e70c9d5 | 2005-06-25 14:54:25 -0700 | [diff] [blame] | 499 | if (strncmp(buff, bios_version, sizeof(bios_version)) != 0) |
| 500 | printk(KERN_WARNING "i8k: BIOS version mismatch: %s != %s\n", |
| 501 | buff, bios_version); |
Dmitry Torokhov | dec63ec | 2005-06-25 14:54:23 -0700 | [diff] [blame] | 502 | } |
| 503 | |
| 504 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 505 | } |
| 506 | |
Dmitry Torokhov | 8378b92 | 2005-06-25 14:54:27 -0700 | [diff] [blame] | 507 | static int __init i8k_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 508 | { |
Dmitry Torokhov | dec63ec | 2005-06-25 14:54:23 -0700 | [diff] [blame] | 509 | struct proc_dir_entry *proc_i8k; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 510 | |
Dmitry Torokhov | dec63ec | 2005-06-25 14:54:23 -0700 | [diff] [blame] | 511 | /* Are we running on an supported laptop? */ |
Dmitry Torokhov | e70c9d5 | 2005-06-25 14:54:25 -0700 | [diff] [blame] | 512 | if (i8k_probe()) |
Dmitry Torokhov | dec63ec | 2005-06-25 14:54:23 -0700 | [diff] [blame] | 513 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 514 | |
Dmitry Torokhov | dec63ec | 2005-06-25 14:54:23 -0700 | [diff] [blame] | 515 | /* Register the proc entry */ |
Dmitry Torokhov | 352f8f8 | 2005-06-25 14:54:26 -0700 | [diff] [blame] | 516 | proc_i8k = create_proc_entry("i8k", 0, NULL); |
| 517 | if (!proc_i8k) |
Dmitry Torokhov | dec63ec | 2005-06-25 14:54:23 -0700 | [diff] [blame] | 518 | return -ENOENT; |
Dmitry Torokhov | 352f8f8 | 2005-06-25 14:54:26 -0700 | [diff] [blame] | 519 | |
Dmitry Torokhov | dec63ec | 2005-06-25 14:54:23 -0700 | [diff] [blame] | 520 | proc_i8k->proc_fops = &i8k_fops; |
| 521 | proc_i8k->owner = THIS_MODULE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 522 | |
Dmitry Torokhov | dec63ec | 2005-06-25 14:54:23 -0700 | [diff] [blame] | 523 | printk(KERN_INFO |
| 524 | "Dell laptop SMM driver v%s Massimo Dal Zotto (dz@debian.org)\n", |
| 525 | I8K_VERSION); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 526 | |
Dmitry Torokhov | dec63ec | 2005-06-25 14:54:23 -0700 | [diff] [blame] | 527 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 528 | } |
| 529 | |
Dmitry Torokhov | 8378b92 | 2005-06-25 14:54:27 -0700 | [diff] [blame] | 530 | static void __exit i8k_exit(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 531 | { |
Dmitry Torokhov | dec63ec | 2005-06-25 14:54:23 -0700 | [diff] [blame] | 532 | remove_proc_entry("i8k", NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 533 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 534 | |
Dmitry Torokhov | 8378b92 | 2005-06-25 14:54:27 -0700 | [diff] [blame] | 535 | module_init(i8k_init); |
| 536 | module_exit(i8k_exit); |