From 5d1646d90e1f2cceb9f0828f4b28318cd0ec7744 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sat, 27 Apr 2024 12:05:51 +0200 Subject: Adding upstream version 5.10.209. Signed-off-by: Daniel Baumann --- drivers/hwmon/dell-smm-hwmon.c | 1341 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 1341 insertions(+) create mode 100644 drivers/hwmon/dell-smm-hwmon.c (limited to 'drivers/hwmon/dell-smm-hwmon.c') diff --git a/drivers/hwmon/dell-smm-hwmon.c b/drivers/hwmon/dell-smm-hwmon.c new file mode 100644 index 000000000..10c7b6295 --- /dev/null +++ b/drivers/hwmon/dell-smm-hwmon.c @@ -0,0 +1,1341 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * dell-smm-hwmon.c -- Linux driver for accessing the SMM BIOS on Dell laptops. + * + * Copyright (C) 2001 Massimo Dal Zotto + * + * Hwmon integration: + * Copyright (C) 2011 Jean Delvare + * Copyright (C) 2013, 2014 Guenter Roeck + * Copyright (C) 2014, 2015 Pali Rohár + */ + +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include + +#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; +static unsigned int manual_fan; +static unsigned int auto_fan; + +#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_TEMP5 (1 << 4) +#define I8K_HWMON_HAVE_TEMP6 (1 << 5) +#define I8K_HWMON_HAVE_TEMP7 (1 << 6) +#define I8K_HWMON_HAVE_TEMP8 (1 << 7) +#define I8K_HWMON_HAVE_TEMP9 (1 << 8) +#define I8K_HWMON_HAVE_TEMP10 (1 << 9) +#define I8K_HWMON_HAVE_FAN1 (1 << 10) +#define I8K_HWMON_HAVE_FAN2 (1 << 11) +#define I8K_HWMON_HAVE_FAN3 (1 << 12) + +MODULE_AUTHOR("Massimo Dal Zotto (dz@debian.org)"); +MODULE_AUTHOR("Pali Rohár "); +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; +} + +/* + * Enable or disable automatic BIOS fan control support + */ +static int i8k_enable_fan_auto_mode(bool enable) +{ + struct smm_regs regs = { }; + + if (disallow_fan_support) + return -EINVAL; + + regs.eax = enable ? auto_fan : manual_fan; + return i8k_smm(®s); +} + +/* + * Set the fan speed (off, low, high, ...). + */ +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); +} + +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, err; + 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; + + err = i8k_set_fan(val, speed); + if (err < 0) + return err; + + val = i8k_get_fan_status(val); + 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 proc_ops i8k_proc_ops = { + .proc_open = i8k_open_fs, + .proc_read = seq_read, + .proc_lseek = seq_lseek, + .proc_release = single_release, + .proc_ioctl = i8k_ioctl, +}; + +static struct proc_dir_entry *entry; + +static void __init i8k_init_procfs(void) +{ + /* Register the proc entry */ + entry = proc_create("i8k", 0, NULL, &i8k_proc_ops); +} + +static void __exit i8k_exit_procfs(void) +{ + if (entry) + 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 ssize_t i8k_hwmon_pwm_enable_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + int err; + bool enable; + unsigned long val; + + if (!auto_fan) + return -ENODEV; + + err = kstrtoul(buf, 10, &val); + if (err) + return err; + + if (val == 1) + enable = false; + else if (val == 2) + enable = true; + else + return -EINVAL; + + mutex_lock(&i8k_mutex); + err = i8k_enable_fan_auto_mode(enable); + mutex_unlock(&i8k_mutex); + + return err ? err : 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(temp5_input, i8k_hwmon_temp, 4); +static SENSOR_DEVICE_ATTR_RO(temp5_label, i8k_hwmon_temp_label, 4); +static SENSOR_DEVICE_ATTR_RO(temp6_input, i8k_hwmon_temp, 5); +static SENSOR_DEVICE_ATTR_RO(temp6_label, i8k_hwmon_temp_label, 5); +static SENSOR_DEVICE_ATTR_RO(temp7_input, i8k_hwmon_temp, 6); +static SENSOR_DEVICE_ATTR_RO(temp7_label, i8k_hwmon_temp_label, 6); +static SENSOR_DEVICE_ATTR_RO(temp8_input, i8k_hwmon_temp, 7); +static SENSOR_DEVICE_ATTR_RO(temp8_label, i8k_hwmon_temp_label, 7); +static SENSOR_DEVICE_ATTR_RO(temp9_input, i8k_hwmon_temp, 8); +static SENSOR_DEVICE_ATTR_RO(temp9_label, i8k_hwmon_temp_label, 8); +static SENSOR_DEVICE_ATTR_RO(temp10_input, i8k_hwmon_temp, 9); +static SENSOR_DEVICE_ATTR_RO(temp10_label, i8k_hwmon_temp_label, 9); +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_WO(pwm1_enable, i8k_hwmon_pwm_enable, 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_temp5_input.dev_attr.attr, /* 8 */ + &sensor_dev_attr_temp5_label.dev_attr.attr, /* 9 */ + &sensor_dev_attr_temp6_input.dev_attr.attr, /* 10 */ + &sensor_dev_attr_temp6_label.dev_attr.attr, /* 11 */ + &sensor_dev_attr_temp7_input.dev_attr.attr, /* 12 */ + &sensor_dev_attr_temp7_label.dev_attr.attr, /* 13 */ + &sensor_dev_attr_temp8_input.dev_attr.attr, /* 14 */ + &sensor_dev_attr_temp8_label.dev_attr.attr, /* 15 */ + &sensor_dev_attr_temp9_input.dev_attr.attr, /* 16 */ + &sensor_dev_attr_temp9_label.dev_attr.attr, /* 17 */ + &sensor_dev_attr_temp10_input.dev_attr.attr, /* 18 */ + &sensor_dev_attr_temp10_label.dev_attr.attr, /* 19 */ + &sensor_dev_attr_fan1_input.dev_attr.attr, /* 20 */ + &sensor_dev_attr_fan1_label.dev_attr.attr, /* 21 */ + &sensor_dev_attr_pwm1.dev_attr.attr, /* 22 */ + &sensor_dev_attr_pwm1_enable.dev_attr.attr, /* 23 */ + &sensor_dev_attr_fan2_input.dev_attr.attr, /* 24 */ + &sensor_dev_attr_fan2_label.dev_attr.attr, /* 25 */ + &sensor_dev_attr_pwm2.dev_attr.attr, /* 26 */ + &sensor_dev_attr_fan3_input.dev_attr.attr, /* 27 */ + &sensor_dev_attr_fan3_label.dev_attr.attr, /* 28 */ + &sensor_dev_attr_pwm3.dev_attr.attr, /* 29 */ + NULL +}; + +static umode_t i8k_is_visible(struct kobject *kobj, struct attribute *attr, + int index) +{ + if (disallow_fan_support && index >= 20) + return 0; + if (disallow_fan_type_call && + (index == 21 || index == 25 || index == 28)) + 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 <= 9 && + !(i8k_hwmon_flags & I8K_HWMON_HAVE_TEMP5)) + return 0; + if (index >= 10 && index <= 11 && + !(i8k_hwmon_flags & I8K_HWMON_HAVE_TEMP6)) + return 0; + if (index >= 12 && index <= 13 && + !(i8k_hwmon_flags & I8K_HWMON_HAVE_TEMP7)) + return 0; + if (index >= 14 && index <= 15 && + !(i8k_hwmon_flags & I8K_HWMON_HAVE_TEMP8)) + return 0; + if (index >= 16 && index <= 17 && + !(i8k_hwmon_flags & I8K_HWMON_HAVE_TEMP9)) + return 0; + if (index >= 18 && index <= 19 && + !(i8k_hwmon_flags & I8K_HWMON_HAVE_TEMP10)) + return 0; + + if (index >= 20 && index <= 23 && + !(i8k_hwmon_flags & I8K_HWMON_HAVE_FAN1)) + return 0; + if (index >= 24 && index <= 26 && + !(i8k_hwmon_flags & I8K_HWMON_HAVE_FAN2)) + return 0; + if (index >= 27 && index <= 29 && + !(i8k_hwmon_flags & I8K_HWMON_HAVE_FAN3)) + return 0; + + if (index == 23 && !auto_fan) + 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; + err = i8k_get_temp_type(4); + if (err >= 0) + i8k_hwmon_flags |= I8K_HWMON_HAVE_TEMP5; + err = i8k_get_temp_type(5); + if (err >= 0) + i8k_hwmon_flags |= I8K_HWMON_HAVE_TEMP6; + err = i8k_get_temp_type(6); + if (err >= 0) + i8k_hwmon_flags |= I8K_HWMON_HAVE_TEMP7; + err = i8k_get_temp_type(7); + if (err >= 0) + i8k_hwmon_flags |= I8K_HWMON_HAVE_TEMP8; + err = i8k_get_temp_type(8); + if (err >= 0) + i8k_hwmon_flags |= I8K_HWMON_HAVE_TEMP9; + err = i8k_get_temp_type(9); + if (err >= 0) + i8k_hwmon_flags |= I8K_HWMON_HAVE_TEMP10; + + /* 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 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 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", + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), + DMI_MATCH(DMI_PRODUCT_NAME, "XPS"), + }, + }, + { } +}; + +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"), + }, + }, + { + .ident = "Dell XPS 15 L502X", + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), + DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "Dell System XPS L502X"), + }, + }, + { } +}; + +struct i8k_fan_control_data { + unsigned int manual_fan; + unsigned int auto_fan; +}; + +enum i8k_fan_controls { + I8K_FAN_34A3_35A3, +}; + +static const struct i8k_fan_control_data i8k_fan_control_data[] = { + [I8K_FAN_34A3_35A3] = { + .manual_fan = 0x34a3, + .auto_fan = 0x35a3, + }, +}; + +static struct dmi_system_id i8k_whitelist_fan_control[] __initdata = { + { + .ident = "Dell Precision 5530", + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), + DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "Precision 5530"), + }, + .driver_data = (void *)&i8k_fan_control_data[I8K_FAN_34A3_35A3], + }, + { + .ident = "Dell Latitude 5480", + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), + DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "Latitude 5480"), + }, + .driver_data = (void *)&i8k_fan_control_data[I8K_FAN_34A3_35A3], + }, + { + .ident = "Dell Latitude E6440", + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), + DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "Latitude E6440"), + }, + .driver_data = (void *)&i8k_fan_control_data[I8K_FAN_34A3_35A3], + }, + { } +}; + +/* + * Probe for the presence of a supported laptop. + */ +static int __init i8k_probe(void) +{ + const struct dmi_system_id *id, *fan_control; + 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); + + fan_control = dmi_first_match(i8k_whitelist_fan_control); + if (fan_control && fan_control->driver_data) { + const struct i8k_fan_control_data *data = fan_control->driver_data; + + manual_fan = data->manual_fan; + auto_fan = data->auto_fan; + pr_info("enabling support for setting automatic/manual fan control\n"); + } + + 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); -- cgit v1.2.3