| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Pali Rohár | 1530 | 33.95% | 19 | 26.76% |
| Guenter Roeck | 1055 | 23.41% | 16 | 22.54% |
| Linus Torvalds | 876 | 19.44% | 2 | 2.82% |
| Dmitry Torokhov | 345 | 7.66% | 8 | 11.27% |
| Jean Delvare | 252 | 5.59% | 1 | 1.41% |
| Juergen Gross | 55 | 1.22% | 1 | 1.41% |
| Frédéric Weisbecker | 41 | 0.91% | 1 | 1.41% |
| Nick Warne | 27 | 0.60% | 1 | 1.41% |
| Andy Spencer | 26 | 0.58% | 1 | 1.41% |
| Federico Heinz | 26 | 0.58% | 1 | 1.41% |
| Helge Eichelberg | 26 | 0.58% | 1 | 1.41% |
| Alan Cox | 26 | 0.58% | 1 | 1.41% |
| Michele Sorcinelli | 26 | 0.58% | 1 | 1.41% |
| Frank Sorenson | 26 | 0.58% | 1 | 1.41% |
| Oleksandr Natalenko | 26 | 0.58% | 1 | 1.41% |
| Thorsten Leemhuis | 26 | 0.58% | 1 | 1.41% |
| James H. Cloos Jr | 23 | 0.51% | 1 | 1.41% |
| Al Viro | 22 | 0.49% | 2 | 2.82% |
| Arnd Bergmann | 17 | 0.38% | 1 | 1.41% |
| Jochen Eisinger | 17 | 0.38% | 1 | 1.41% |
| Bradley Smith | 10 | 0.22% | 1 | 1.41% |
| Jan Engelhardt | 7 | 0.16% | 1 | 1.41% |
| Jim Bos | 4 | 0.09% | 1 | 1.41% |
| Christoph Hellwig | 4 | 0.09% | 1 | 1.41% |
| Rusty Russell | 4 | 0.09% | 1 | 1.41% |
| Joe Perches | 3 | 0.07% | 1 | 1.41% |
| Alexey Dobriyan | 3 | 0.07% | 1 | 1.41% |
| Jeff Garzik | 2 | 0.04% | 1 | 1.41% |
| Gabriele Mazzotta | 1 | 0.02% | 1 | 1.41% |
| Total | 4506 | 71 |
/* * dell-smm-hwmon.c -- Linux driver for accessing the SMM BIOS on Dell laptops. * * Copyright (C) 2001 Massimo Dal Zotto <dz@debian.org> * * Hwmon integration: * Copyright (C) 2011 Jean Delvare <jdelvare@suse.de> * Copyright (C) 2013, 2014 Guenter Roeck <linux@roeck-us.net> * Copyright (C) 2014, 2015 Pali Rohár <pali.rohar@gmail.com> * * This program is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License as published by the * Free Software Foundation; either version 2, or (at your option) any * later version. * * This program is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * General Public License for more details. */ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt #include <linux/cpu.h> #include <linux/delay.h> #include <linux/module.h> #include <linux/types.h> #include <linux/init.h> #include <linux/proc_fs.h> #include <linux/seq_file.h> #include <linux/dmi.h> #include <linux/capability.h> #include <linux/mutex.h> #include <linux/hwmon.h> #include <linux/hwmon-sysfs.h> #include <linux/uaccess.h> #include <linux/io.h> #include <linux/sched.h> #include <linux/ctype.h> #include <linux/smp.h> #include <linux/i8k.h> #define I8K_SMM_FN_STATUS 0x0025 #define I8K_SMM_POWER_STATUS 0x0069 #define I8K_SMM_SET_FAN 0x01a3 #define I8K_SMM_GET_FAN 0x00a3 #define I8K_SMM_GET_SPEED 0x02a3 #define I8K_SMM_GET_FAN_TYPE 0x03a3 #define I8K_SMM_GET_NOM_SPEED 0x04a3 #define I8K_SMM_GET_TEMP 0x10a3 #define I8K_SMM_GET_TEMP_TYPE 0x11a3 #define I8K_SMM_GET_DELL_SIG1 0xfea3 #define I8K_SMM_GET_DELL_SIG2 0xffa3 #define I8K_FAN_MULT 30 #define I8K_FAN_MAX_RPM 30000 #define I8K_MAX_TEMP 127 #define I8K_FN_NONE 0x00 #define I8K_FN_UP 0x01 #define I8K_FN_DOWN 0x02 #define I8K_FN_MUTE 0x04 #define I8K_FN_MASK 0x07 #define I8K_FN_SHIFT 8 #define I8K_POWER_AC 0x05 #define I8K_POWER_BATTERY 0x01 static DEFINE_MUTEX(i8k_mutex); static char bios_version[4]; static char bios_machineid[16]; static struct device *i8k_hwmon_dev; static u32 i8k_hwmon_flags; static uint i8k_fan_mult = I8K_FAN_MULT; static uint i8k_pwm_mult; static uint i8k_fan_max = I8K_FAN_HIGH; static bool disallow_fan_type_call; static bool disallow_fan_support; #define I8K_HWMON_HAVE_TEMP1 (1 << 0) #define I8K_HWMON_HAVE_TEMP2 (1 << 1) #define I8K_HWMON_HAVE_TEMP3 (1 << 2) #define I8K_HWMON_HAVE_TEMP4 (1 << 3) #define I8K_HWMON_HAVE_FAN1 (1 << 4) #define I8K_HWMON_HAVE_FAN2 (1 << 5) #define I8K_HWMON_HAVE_FAN3 (1 << 6) MODULE_AUTHOR("Massimo Dal Zotto (dz@debian.org)"); MODULE_AUTHOR("Pali Rohár <pali.rohar@gmail.com>"); MODULE_DESCRIPTION("Dell laptop SMM BIOS hwmon driver"); MODULE_LICENSE("GPL"); MODULE_ALIAS("i8k"); static bool force; module_param(force, bool, 0); MODULE_PARM_DESC(force, "Force loading without checking for supported models"); static bool ignore_dmi; module_param(ignore_dmi, bool, 0); MODULE_PARM_DESC(ignore_dmi, "Continue probing hardware even if DMI data does not match"); #if IS_ENABLED(CONFIG_I8K) static bool restricted = true; module_param(restricted, bool, 0); MODULE_PARM_DESC(restricted, "Restrict fan control and serial number to CAP_SYS_ADMIN (default: 1)"); static bool power_status; module_param(power_status, bool, 0600); MODULE_PARM_DESC(power_status, "Report power status in /proc/i8k (default: 0)"); #endif static uint fan_mult; module_param(fan_mult, uint, 0); MODULE_PARM_DESC(fan_mult, "Factor to multiply fan speed with (default: autodetect)"); static uint fan_max; module_param(fan_max, uint, 0); MODULE_PARM_DESC(fan_max, "Maximum configurable fan speed (default: autodetect)"); struct smm_regs { unsigned int eax; unsigned int ebx __packed; unsigned int ecx __packed; unsigned int edx __packed; unsigned int esi __packed; unsigned int edi __packed; }; static inline const char *i8k_get_dmi_data(int field) { const char *dmi_data = dmi_get_system_info(field); return dmi_data && *dmi_data ? dmi_data : "?"; } /* * Call the System Management Mode BIOS. Code provided by Jonathan Buzzard. */ static int i8k_smm_func(void *par) { int rc; struct smm_regs *regs = par; int eax = regs->eax; #ifdef DEBUG int ebx = regs->ebx; unsigned long duration; ktime_t calltime, delta, rettime; calltime = ktime_get(); #endif /* SMM requires CPU 0 */ if (smp_processor_id() != 0) return -EBUSY; #if defined(CONFIG_X86_64) asm volatile("pushq %%rax\n\t" "movl 0(%%rax),%%edx\n\t" "pushq %%rdx\n\t" "movl 4(%%rax),%%ebx\n\t" "movl 8(%%rax),%%ecx\n\t" "movl 12(%%rax),%%edx\n\t" "movl 16(%%rax),%%esi\n\t" "movl 20(%%rax),%%edi\n\t" "popq %%rax\n\t" "out %%al,$0xb2\n\t" "out %%al,$0x84\n\t" "xchgq %%rax,(%%rsp)\n\t" "movl %%ebx,4(%%rax)\n\t" "movl %%ecx,8(%%rax)\n\t" "movl %%edx,12(%%rax)\n\t" "movl %%esi,16(%%rax)\n\t" "movl %%edi,20(%%rax)\n\t" "popq %%rdx\n\t" "movl %%edx,0(%%rax)\n\t" "pushfq\n\t" "popq %%rax\n\t" "andl $1,%%eax\n" : "=a"(rc) : "a"(regs) : "%ebx", "%ecx", "%edx", "%esi", "%edi", "memory"); #else asm volatile("pushl %%eax\n\t" "movl 0(%%eax),%%edx\n\t" "push %%edx\n\t" "movl 4(%%eax),%%ebx\n\t" "movl 8(%%eax),%%ecx\n\t" "movl 12(%%eax),%%edx\n\t" "movl 16(%%eax),%%esi\n\t" "movl 20(%%eax),%%edi\n\t" "popl %%eax\n\t" "out %%al,$0xb2\n\t" "out %%al,$0x84\n\t" "xchgl %%eax,(%%esp)\n\t" "movl %%ebx,4(%%eax)\n\t" "movl %%ecx,8(%%eax)\n\t" "movl %%edx,12(%%eax)\n\t" "movl %%esi,16(%%eax)\n\t" "movl %%edi,20(%%eax)\n\t" "popl %%edx\n\t" "movl %%edx,0(%%eax)\n\t" "lahf\n\t" "shrl $8,%%eax\n\t" "andl $1,%%eax\n" : "=a"(rc) : "a"(regs) : "%ebx", "%ecx", "%edx", "%esi", "%edi", "memory"); #endif if (rc != 0 || (regs->eax & 0xffff) == 0xffff || regs->eax == eax) rc = -EINVAL; #ifdef DEBUG rettime = ktime_get(); delta = ktime_sub(rettime, calltime); duration = ktime_to_ns(delta) >> 10; pr_debug("smm(0x%.4x 0x%.4x) = 0x%.4x (took %7lu usecs)\n", eax, ebx, (rc ? 0xffff : regs->eax & 0xffff), duration); #endif return rc; } /* * Call the System Management Mode BIOS. */ static int i8k_smm(struct smm_regs *regs) { int ret; get_online_cpus(); ret = smp_call_on_cpu(0, i8k_smm_func, regs, true); put_online_cpus(); return ret; } /* * Read the fan status. */ static int i8k_get_fan_status(int fan) { struct smm_regs regs = { .eax = I8K_SMM_GET_FAN, }; if (disallow_fan_support) return -EINVAL; regs.ebx = fan & 0xff; return i8k_smm(®s) ? : regs.eax & 0xff; } /* * Read the fan speed in RPM. */ static int i8k_get_fan_speed(int fan) { struct smm_regs regs = { .eax = I8K_SMM_GET_SPEED, }; if (disallow_fan_support) return -EINVAL; regs.ebx = fan & 0xff; return i8k_smm(®s) ? : (regs.eax & 0xffff) * i8k_fan_mult; } /* * Read the fan type. */ static int _i8k_get_fan_type(int fan) { struct smm_regs regs = { .eax = I8K_SMM_GET_FAN_TYPE, }; if (disallow_fan_support || disallow_fan_type_call) return -EINVAL; regs.ebx = fan & 0xff; return i8k_smm(®s) ? : regs.eax & 0xff; } static int i8k_get_fan_type(int fan) { /* I8K_SMM_GET_FAN_TYPE SMM call is expensive, so cache values */ static int types[3] = { INT_MIN, INT_MIN, INT_MIN }; if (types[fan] == INT_MIN) types[fan] = _i8k_get_fan_type(fan); return types[fan]; } /* * Read the fan nominal rpm for specific fan speed. */ static int i8k_get_fan_nominal_speed(int fan, int speed) { struct smm_regs regs = { .eax = I8K_SMM_GET_NOM_SPEED, }; if (disallow_fan_support) return -EINVAL; regs.ebx = (fan & 0xff) | (speed << 8); return i8k_smm(®s) ? : (regs.eax & 0xffff) * i8k_fan_mult; } /* * Set the fan speed (off, low, high). Returns the new fan status. */ static int i8k_set_fan(int fan, int speed) { struct smm_regs regs = { .eax = I8K_SMM_SET_FAN, }; if (disallow_fan_support) return -EINVAL; speed = (speed < 0) ? 0 : ((speed > i8k_fan_max) ? i8k_fan_max : speed); regs.ebx = (fan & 0xff) | (speed << 8); return i8k_smm(®s) ? : i8k_get_fan_status(fan); } static int i8k_get_temp_type(int sensor) { struct smm_regs regs = { .eax = I8K_SMM_GET_TEMP_TYPE, }; regs.ebx = sensor & 0xff; return i8k_smm(®s) ? : regs.eax & 0xff; } /* * Read the cpu temperature. */ static int _i8k_get_temp(int sensor) { struct smm_regs regs = { .eax = I8K_SMM_GET_TEMP, .ebx = sensor & 0xff, }; return i8k_smm(®s) ? : regs.eax & 0xff; } static int i8k_get_temp(int sensor) { int temp = _i8k_get_temp(sensor); /* * Sometimes the temperature sensor returns 0x99, which is out of range. * In this case we retry (once) before returning an error. # 1003655137 00000058 00005a4b # 1003655138 00000099 00003a80 <--- 0x99 = 153 degrees # 1003655139 00000054 00005c52 */ if (temp == 0x99) { msleep(100); temp = _i8k_get_temp(sensor); } /* * Return -ENODATA for all invalid temperatures. * * Known instances are the 0x99 value as seen above as well as * 0xc1 (193), which may be returned when trying to read the GPU * temperature if the system supports a GPU and it is currently * turned off. */ if (temp > I8K_MAX_TEMP) return -ENODATA; return temp; } static int i8k_get_dell_signature(int req_fn) { struct smm_regs regs = { .eax = req_fn, }; int rc; rc = i8k_smm(®s); if (rc < 0) return rc; return regs.eax == 1145651527 && regs.edx == 1145392204 ? 0 : -1; } #if IS_ENABLED(CONFIG_I8K) /* * Read the Fn key status. */ static int i8k_get_fn_status(void) { struct smm_regs regs = { .eax = I8K_SMM_FN_STATUS, }; int rc; rc = i8k_smm(®s); if (rc < 0) return rc; switch ((regs.eax >> I8K_FN_SHIFT) & I8K_FN_MASK) { case I8K_FN_UP: return I8K_VOL_UP; case I8K_FN_DOWN: return I8K_VOL_DOWN; case I8K_FN_MUTE: return I8K_VOL_MUTE; default: return 0; } } /* * Read the power status. */ static int i8k_get_power_status(void) { struct smm_regs regs = { .eax = I8K_SMM_POWER_STATUS, }; int rc; rc = i8k_smm(®s); if (rc < 0) return rc; return (regs.eax & 0xff) == I8K_POWER_AC ? I8K_AC : I8K_BATTERY; } /* * Procfs interface */ static int i8k_ioctl_unlocked(struct file *fp, unsigned int cmd, unsigned long arg) { int val = 0; int speed; unsigned char buff[16]; int __user *argp = (int __user *)arg; if (!argp) return -EINVAL; switch (cmd) { case I8K_BIOS_VERSION: if (!isdigit(bios_version[0]) || !isdigit(bios_version[1]) || !isdigit(bios_version[2])) return -EINVAL; val = (bios_version[0] << 16) | (bios_version[1] << 8) | bios_version[2]; break; case I8K_MACHINE_ID: if (restricted && !capable(CAP_SYS_ADMIN)) return -EPERM; memset(buff, 0, sizeof(buff)); strlcpy(buff, bios_machineid, sizeof(buff)); break; case I8K_FN_STATUS: val = i8k_get_fn_status(); break; case I8K_POWER_STATUS: val = i8k_get_power_status(); break; case I8K_GET_TEMP: val = i8k_get_temp(0); break; case I8K_GET_SPEED: if (copy_from_user(&val, argp, sizeof(int))) return -EFAULT; val = i8k_get_fan_speed(val); break; case I8K_GET_FAN: if (copy_from_user(&val, argp, sizeof(int))) return -EFAULT; val = i8k_get_fan_status(val); break; case I8K_SET_FAN: if (restricted && !capable(CAP_SYS_ADMIN)) return -EPERM; if (copy_from_user(&val, argp, sizeof(int))) return -EFAULT; if (copy_from_user(&speed, argp + 1, sizeof(int))) return -EFAULT; val = i8k_set_fan(val, speed); break; default: return -EINVAL; } if (val < 0) return val; switch (cmd) { case I8K_BIOS_VERSION: if (copy_to_user(argp, &val, 4)) return -EFAULT; break; case I8K_MACHINE_ID: if (copy_to_user(argp, buff, 16)) return -EFAULT; break; default: if (copy_to_user(argp, &val, sizeof(int))) return -EFAULT; break; } return 0; } static long i8k_ioctl(struct file *fp, unsigned int cmd, unsigned long arg) { long ret; mutex_lock(&i8k_mutex); ret = i8k_ioctl_unlocked(fp, cmd, arg); mutex_unlock(&i8k_mutex); return ret; } /* * Print the information for /proc/i8k. */ static int i8k_proc_show(struct seq_file *seq, void *offset) { int fn_key, cpu_temp, ac_power; int left_fan, right_fan, left_speed, right_speed; cpu_temp = i8k_get_temp(0); /* 11100 µs */ left_fan = i8k_get_fan_status(I8K_FAN_LEFT); /* 580 µs */ right_fan = i8k_get_fan_status(I8K_FAN_RIGHT); /* 580 µs */ left_speed = i8k_get_fan_speed(I8K_FAN_LEFT); /* 580 µs */ right_speed = i8k_get_fan_speed(I8K_FAN_RIGHT); /* 580 µs */ fn_key = i8k_get_fn_status(); /* 750 µs */ if (power_status) ac_power = i8k_get_power_status(); /* 14700 µs */ else ac_power = -1; /* * Info: * * 1) Format version (this will change if format changes) * 2) BIOS version * 3) BIOS machine ID * 4) Cpu temperature * 5) Left fan status * 6) Right fan status * 7) Left fan speed * 8) Right fan speed * 9) AC power * 10) Fn Key status */ seq_printf(seq, "%s %s %s %d %d %d %d %d %d %d\n", I8K_PROC_FMT, bios_version, (restricted && !capable(CAP_SYS_ADMIN)) ? "-1" : bios_machineid, cpu_temp, left_fan, right_fan, left_speed, right_speed, ac_power, fn_key); return 0; } static int i8k_open_fs(struct inode *inode, struct file *file) { return single_open(file, i8k_proc_show, NULL); } static const struct file_operations i8k_fops = { .owner = THIS_MODULE, .open = i8k_open_fs, .read = seq_read, .llseek = seq_lseek, .release = single_release, .unlocked_ioctl = i8k_ioctl, }; static void __init i8k_init_procfs(void) { /* Register the proc entry */ proc_create("i8k", 0, NULL, &i8k_fops); } static void __exit i8k_exit_procfs(void) { remove_proc_entry("i8k", NULL); } #else static inline void __init i8k_init_procfs(void) { } static inline void __exit i8k_exit_procfs(void) { } #endif /* * Hwmon interface */ static ssize_t i8k_hwmon_temp_label_show(struct device *dev, struct device_attribute *devattr, char *buf) { static const char * const labels[] = { "CPU", "GPU", "SODIMM", "Other", "Ambient", "Other", }; int index = to_sensor_dev_attr(devattr)->index; int type; type = i8k_get_temp_type(index); if (type < 0) return type; if (type >= ARRAY_SIZE(labels)) type = ARRAY_SIZE(labels) - 1; return sprintf(buf, "%s\n", labels[type]); } static ssize_t i8k_hwmon_temp_show(struct device *dev, struct device_attribute *devattr, char *buf) { int index = to_sensor_dev_attr(devattr)->index; int temp; temp = i8k_get_temp(index); if (temp < 0) return temp; return sprintf(buf, "%d\n", temp * 1000); } static ssize_t i8k_hwmon_fan_label_show(struct device *dev, struct device_attribute *devattr, char *buf) { static const char * const labels[] = { "Processor Fan", "Motherboard Fan", "Video Fan", "Power Supply Fan", "Chipset Fan", "Other Fan", }; int index = to_sensor_dev_attr(devattr)->index; bool dock = false; int type; type = i8k_get_fan_type(index); if (type < 0) return type; if (type & 0x10) { dock = true; type &= 0x0F; } if (type >= ARRAY_SIZE(labels)) type = (ARRAY_SIZE(labels) - 1); return sprintf(buf, "%s%s\n", (dock ? "Docking " : ""), labels[type]); } static ssize_t i8k_hwmon_fan_show(struct device *dev, struct device_attribute *devattr, char *buf) { int index = to_sensor_dev_attr(devattr)->index; int fan_speed; fan_speed = i8k_get_fan_speed(index); if (fan_speed < 0) return fan_speed; return sprintf(buf, "%d\n", fan_speed); } static ssize_t i8k_hwmon_pwm_show(struct device *dev, struct device_attribute *devattr, char *buf) { int index = to_sensor_dev_attr(devattr)->index; int status; status = i8k_get_fan_status(index); if (status < 0) return -EIO; return sprintf(buf, "%d\n", clamp_val(status * i8k_pwm_mult, 0, 255)); } static ssize_t i8k_hwmon_pwm_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { int index = to_sensor_dev_attr(attr)->index; unsigned long val; int err; err = kstrtoul(buf, 10, &val); if (err) return err; val = clamp_val(DIV_ROUND_CLOSEST(val, i8k_pwm_mult), 0, i8k_fan_max); mutex_lock(&i8k_mutex); err = i8k_set_fan(index, val); mutex_unlock(&i8k_mutex); return err < 0 ? -EIO : count; } static SENSOR_DEVICE_ATTR_RO(temp1_input, i8k_hwmon_temp, 0); static SENSOR_DEVICE_ATTR_RO(temp1_label, i8k_hwmon_temp_label, 0); static SENSOR_DEVICE_ATTR_RO(temp2_input, i8k_hwmon_temp, 1); static SENSOR_DEVICE_ATTR_RO(temp2_label, i8k_hwmon_temp_label, 1); static SENSOR_DEVICE_ATTR_RO(temp3_input, i8k_hwmon_temp, 2); static SENSOR_DEVICE_ATTR_RO(temp3_label, i8k_hwmon_temp_label, 2); static SENSOR_DEVICE_ATTR_RO(temp4_input, i8k_hwmon_temp, 3); static SENSOR_DEVICE_ATTR_RO(temp4_label, i8k_hwmon_temp_label, 3); static SENSOR_DEVICE_ATTR_RO(fan1_input, i8k_hwmon_fan, 0); static SENSOR_DEVICE_ATTR_RO(fan1_label, i8k_hwmon_fan_label, 0); static SENSOR_DEVICE_ATTR_RW(pwm1, i8k_hwmon_pwm, 0); static SENSOR_DEVICE_ATTR_RO(fan2_input, i8k_hwmon_fan, 1); static SENSOR_DEVICE_ATTR_RO(fan2_label, i8k_hwmon_fan_label, 1); static SENSOR_DEVICE_ATTR_RW(pwm2, i8k_hwmon_pwm, 1); static SENSOR_DEVICE_ATTR_RO(fan3_input, i8k_hwmon_fan, 2); static SENSOR_DEVICE_ATTR_RO(fan3_label, i8k_hwmon_fan_label, 2); static SENSOR_DEVICE_ATTR_RW(pwm3, i8k_hwmon_pwm, 2); static struct attribute *i8k_attrs[] = { &sensor_dev_attr_temp1_input.dev_attr.attr, /* 0 */ &sensor_dev_attr_temp1_label.dev_attr.attr, /* 1 */ &sensor_dev_attr_temp2_input.dev_attr.attr, /* 2 */ &sensor_dev_attr_temp2_label.dev_attr.attr, /* 3 */ &sensor_dev_attr_temp3_input.dev_attr.attr, /* 4 */ &sensor_dev_attr_temp3_label.dev_attr.attr, /* 5 */ &sensor_dev_attr_temp4_input.dev_attr.attr, /* 6 */ &sensor_dev_attr_temp4_label.dev_attr.attr, /* 7 */ &sensor_dev_attr_fan1_input.dev_attr.attr, /* 8 */ &sensor_dev_attr_fan1_label.dev_attr.attr, /* 9 */ &sensor_dev_attr_pwm1.dev_attr.attr, /* 10 */ &sensor_dev_attr_fan2_input.dev_attr.attr, /* 11 */ &sensor_dev_attr_fan2_label.dev_attr.attr, /* 12 */ &sensor_dev_attr_pwm2.dev_attr.attr, /* 13 */ &sensor_dev_attr_fan3_input.dev_attr.attr, /* 14 */ &sensor_dev_attr_fan3_label.dev_attr.attr, /* 15 */ &sensor_dev_attr_pwm3.dev_attr.attr, /* 16 */ NULL }; static umode_t i8k_is_visible(struct kobject *kobj, struct attribute *attr, int index) { if (disallow_fan_support && index >= 8) return 0; if (disallow_fan_type_call && (index == 9 || index == 12 || index == 15)) return 0; if (index >= 0 && index <= 1 && !(i8k_hwmon_flags & I8K_HWMON_HAVE_TEMP1)) return 0; if (index >= 2 && index <= 3 && !(i8k_hwmon_flags & I8K_HWMON_HAVE_TEMP2)) return 0; if (index >= 4 && index <= 5 && !(i8k_hwmon_flags & I8K_HWMON_HAVE_TEMP3)) return 0; if (index >= 6 && index <= 7 && !(i8k_hwmon_flags & I8K_HWMON_HAVE_TEMP4)) return 0; if (index >= 8 && index <= 10 && !(i8k_hwmon_flags & I8K_HWMON_HAVE_FAN1)) return 0; if (index >= 11 && index <= 13 && !(i8k_hwmon_flags & I8K_HWMON_HAVE_FAN2)) return 0; if (index >= 14 && index <= 16 && !(i8k_hwmon_flags & I8K_HWMON_HAVE_FAN3)) return 0; return attr->mode; } static const struct attribute_group i8k_group = { .attrs = i8k_attrs, .is_visible = i8k_is_visible, }; __ATTRIBUTE_GROUPS(i8k); static int __init i8k_init_hwmon(void) { int err; i8k_hwmon_flags = 0; /* CPU temperature attributes, if temperature type is OK */ err = i8k_get_temp_type(0); if (err >= 0) i8k_hwmon_flags |= I8K_HWMON_HAVE_TEMP1; /* check for additional temperature sensors */ err = i8k_get_temp_type(1); if (err >= 0) i8k_hwmon_flags |= I8K_HWMON_HAVE_TEMP2; err = i8k_get_temp_type(2); if (err >= 0) i8k_hwmon_flags |= I8K_HWMON_HAVE_TEMP3; err = i8k_get_temp_type(3); if (err >= 0) i8k_hwmon_flags |= I8K_HWMON_HAVE_TEMP4; /* First fan attributes, if fan status or type is OK */ err = i8k_get_fan_status(0); if (err < 0) err = i8k_get_fan_type(0); if (err >= 0) i8k_hwmon_flags |= I8K_HWMON_HAVE_FAN1; /* Second fan attributes, if fan status or type is OK */ err = i8k_get_fan_status(1); if (err < 0) err = i8k_get_fan_type(1); if (err >= 0) i8k_hwmon_flags |= I8K_HWMON_HAVE_FAN2; /* Third fan attributes, if fan status or type is OK */ err = i8k_get_fan_status(2); if (err < 0) err = i8k_get_fan_type(2); if (err >= 0) i8k_hwmon_flags |= I8K_HWMON_HAVE_FAN3; i8k_hwmon_dev = hwmon_device_register_with_groups(NULL, "dell_smm", NULL, i8k_groups); if (IS_ERR(i8k_hwmon_dev)) { err = PTR_ERR(i8k_hwmon_dev); i8k_hwmon_dev = NULL; pr_err("hwmon registration failed (%d)\n", err); return err; } return 0; } struct i8k_config_data { uint fan_mult; uint fan_max; }; enum i8k_configs { DELL_LATITUDE_D520, DELL_PRECISION_490, DELL_STUDIO, DELL_XPS, }; static const struct i8k_config_data i8k_config_data[] = { [DELL_LATITUDE_D520] = { .fan_mult = 1, .fan_max = I8K_FAN_TURBO, }, [DELL_PRECISION_490] = { .fan_mult = 1, .fan_max = I8K_FAN_TURBO, }, [DELL_STUDIO] = { .fan_mult = 1, .fan_max = I8K_FAN_HIGH, }, [DELL_XPS] = { .fan_mult = 1, .fan_max = I8K_FAN_HIGH, }, }; static const struct dmi_system_id i8k_dmi_table[] __initconst = { { .ident = "Dell Inspiron", .matches = { DMI_MATCH(DMI_SYS_VENDOR, "Dell Computer"), DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron"), }, }, { .ident = "Dell Latitude", .matches = { DMI_MATCH(DMI_SYS_VENDOR, "Dell Computer"), DMI_MATCH(DMI_PRODUCT_NAME, "Latitude"), }, }, { .ident = "Dell Inspiron 2", .matches = { DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron"), }, }, { .ident = "Dell Latitude D520", .matches = { DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), DMI_MATCH(DMI_PRODUCT_NAME, "Latitude D520"), }, .driver_data = (void *)&i8k_config_data[DELL_LATITUDE_D520], }, { .ident = "Dell Latitude 2", .matches = { DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), DMI_MATCH(DMI_PRODUCT_NAME, "Latitude"), }, }, { /* UK Inspiron 6400 */ .ident = "Dell Inspiron 3", .matches = { DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), DMI_MATCH(DMI_PRODUCT_NAME, "MM061"), }, }, { .ident = "Dell Inspiron 3", .matches = { DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), DMI_MATCH(DMI_PRODUCT_NAME, "MP061"), }, }, { .ident = "Dell Precision 490", .matches = { DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), DMI_MATCH(DMI_PRODUCT_NAME, "Precision WorkStation 490"), }, .driver_data = (void *)&i8k_config_data[DELL_PRECISION_490], }, { .ident = "Dell Precision", .matches = { DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), DMI_MATCH(DMI_PRODUCT_NAME, "Precision"), }, }, { .ident = "Dell Vostro", .matches = { DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), DMI_MATCH(DMI_PRODUCT_NAME, "Vostro"), }, }, { .ident = "Dell XPS421", .matches = { DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), DMI_MATCH(DMI_PRODUCT_NAME, "XPS L421X"), }, }, { .ident = "Dell Studio", .matches = { DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), DMI_MATCH(DMI_PRODUCT_NAME, "Studio"), }, .driver_data = (void *)&i8k_config_data[DELL_STUDIO], }, { .ident = "Dell XPS 13", .matches = { DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), DMI_MATCH(DMI_PRODUCT_NAME, "XPS13"), }, .driver_data = (void *)&i8k_config_data[DELL_XPS], }, { .ident = "Dell XPS M140", .matches = { DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), DMI_MATCH(DMI_PRODUCT_NAME, "MXC051"), }, .driver_data = (void *)&i8k_config_data[DELL_XPS], }, { .ident = "Dell XPS 15 9560", .matches = { DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), DMI_MATCH(DMI_PRODUCT_NAME, "XPS 15 9560"), }, }, { .ident = "Dell XPS 15 9570", .matches = { DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), DMI_MATCH(DMI_PRODUCT_NAME, "XPS 15 9570"), }, }, { } }; MODULE_DEVICE_TABLE(dmi, i8k_dmi_table); /* * On some machines once I8K_SMM_GET_FAN_TYPE is issued then CPU fan speed * randomly going up and down due to bug in Dell SMM or BIOS. Here is blacklist * of affected Dell machines for which we disallow I8K_SMM_GET_FAN_TYPE call. * See bug: https://bugzilla.kernel.org/show_bug.cgi?id=100121 */ static const struct dmi_system_id i8k_blacklist_fan_type_dmi_table[] __initconst = { { .ident = "Dell Studio XPS 8000", .matches = { DMI_EXACT_MATCH(DMI_SYS_VENDOR, "Dell Inc."), DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "Studio XPS 8000"), }, }, { .ident = "Dell Studio XPS 8100", .matches = { DMI_EXACT_MATCH(DMI_SYS_VENDOR, "Dell Inc."), DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "Studio XPS 8100"), }, }, { .ident = "Dell Inspiron 580", .matches = { DMI_EXACT_MATCH(DMI_SYS_VENDOR, "Dell Inc."), DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "Inspiron 580 "), }, }, { } }; /* * On some machines all fan related SMM functions implemented by Dell BIOS * firmware freeze kernel for about 500ms. Until Dell fixes these problems fan * support for affected blacklisted Dell machines stay disabled. * See bug: https://bugzilla.kernel.org/show_bug.cgi?id=195751 */ static struct dmi_system_id i8k_blacklist_fan_support_dmi_table[] __initdata = { { .ident = "Dell Inspiron 7720", .matches = { DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "Inspiron 7720"), }, }, { .ident = "Dell Vostro 3360", .matches = { DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "Vostro 3360"), }, }, { .ident = "Dell XPS13 9333", .matches = { DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "XPS13 9333"), }, }, { } }; /* * Probe for the presence of a supported laptop. */ static int __init i8k_probe(void) { const struct dmi_system_id *id; int fan, ret; /* * Get DMI information */ if (!dmi_check_system(i8k_dmi_table)) { if (!ignore_dmi && !force) return -ENODEV; pr_info("not running on a supported Dell system.\n"); pr_info("vendor=%s, model=%s, version=%s\n", i8k_get_dmi_data(DMI_SYS_VENDOR), i8k_get_dmi_data(DMI_PRODUCT_NAME), i8k_get_dmi_data(DMI_BIOS_VERSION)); } if (dmi_check_system(i8k_blacklist_fan_support_dmi_table)) { pr_warn("broken Dell BIOS detected, disallow fan support\n"); if (!force) disallow_fan_support = true; } if (dmi_check_system(i8k_blacklist_fan_type_dmi_table)) { pr_warn("broken Dell BIOS detected, disallow fan type call\n"); if (!force) disallow_fan_type_call = true; } strlcpy(bios_version, i8k_get_dmi_data(DMI_BIOS_VERSION), sizeof(bios_version)); strlcpy(bios_machineid, i8k_get_dmi_data(DMI_PRODUCT_SERIAL), sizeof(bios_machineid)); /* * Get SMM Dell signature */ if (i8k_get_dell_signature(I8K_SMM_GET_DELL_SIG1) && i8k_get_dell_signature(I8K_SMM_GET_DELL_SIG2)) { pr_err("unable to get SMM Dell signature\n"); if (!force) return -ENODEV; } /* * Set fan multiplier and maximal fan speed from dmi config * Values specified in module parameters override values from dmi */ id = dmi_first_match(i8k_dmi_table); if (id && id->driver_data) { const struct i8k_config_data *conf = id->driver_data; if (!fan_mult && conf->fan_mult) fan_mult = conf->fan_mult; if (!fan_max && conf->fan_max) fan_max = conf->fan_max; } i8k_fan_max = fan_max ? : I8K_FAN_HIGH; /* Must not be 0 */ i8k_pwm_mult = DIV_ROUND_UP(255, i8k_fan_max); if (!fan_mult) { /* * Autodetect fan multiplier based on nominal rpm * If fan reports rpm value too high then set multiplier to 1 */ for (fan = 0; fan < 2; ++fan) { ret = i8k_get_fan_nominal_speed(fan, i8k_fan_max); if (ret < 0) continue; if (ret > I8K_FAN_MAX_RPM) i8k_fan_mult = 1; break; } } else { /* Fan multiplier was specified in module param or in dmi */ i8k_fan_mult = fan_mult; } return 0; } static int __init i8k_init(void) { int err; /* Are we running on an supported laptop? */ if (i8k_probe()) return -ENODEV; err = i8k_init_hwmon(); if (err) return err; i8k_init_procfs(); return 0; } static void __exit i8k_exit(void) { hwmon_device_unregister(i8k_hwmon_dev); i8k_exit_procfs(); } module_init(i8k_init); module_exit(i8k_exit);
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