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Message-ID: <5516BB2A.7000900@roeck-us.net>
Date: Sat, 28 Mar 2015 07:31:06 -0700
From: Guenter Roeck <linux@...ck-us.net>
To: Pali Rohár <pali.rohar@...il.com>,
Arnd Bergmann <arnd@...db.de>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
Jean Delvare <jdelvare@...e.de>
CC: Steven Honeyman <stevenhoneyman@...il.com>,
Valdis.Kletnieks@...edu,
Jochen Eisinger <jochen@...guin-breeder.org>,
Gabriele Mazzotta <gabriele.mzt@...il.com>,
linux-kernel@...r.kernel.org, lm-sensors@...sensors.org
Subject: Re: [PATCH 1/2] hwmon: Rename i8k driver to dell-smm-hwmon and move
it to hwmon tree
On 03/28/2015 03:24 AM, Pali Rohár wrote:
> This commit moves i8k driver to hwmon tree under name dell-smm-hwmon which is
> better name then abbreviation i8k. For backward compatibility is added macro
> MODULE_ALIAS("i8k") so modprobe will load driver also old name i8k. CONFIG_I8K
> compile option was not changed.
>
> This commit also adds me as maintainer of this new dell-smm-hwmon driver.
>
> Signed-off-by: Pali Rohár <pali.rohar@...il.com>
Looks ok to me, so I'll be happy to take it for 4.1 if Greg agrees.
I thought about moving the I8K configuration option as well. Not really sure
what to do there. Greg, any opinion ?
It would have to reside outside the HWMON block of drivers/hwmon/Kconfig if
we move it.
We also can drop me as explicit maintainer - I am on the hook from the hwmon side
anyway, and we don't need to step on each other's foot for this driver.
Thanks,
Guenter
> ---
> MAINTAINERS | 3 +-
> drivers/char/Makefile | 1 -
> drivers/char/i8k.c | 1005 ---------------------------------------
> drivers/hwmon/Makefile | 1 +
> drivers/hwmon/dell-smm-hwmon.c | 1007 ++++++++++++++++++++++++++++++++++++++++
> 5 files changed, 1010 insertions(+), 1007 deletions(-)
> delete mode 100644 drivers/char/i8k.c
> create mode 100644 drivers/hwmon/dell-smm-hwmon.c
>
> diff --git a/MAINTAINERS b/MAINTAINERS
> index 88c09ca..bf5bb05 100644
> --- a/MAINTAINERS
> +++ b/MAINTAINERS
> @@ -3064,8 +3064,9 @@ F: drivers/platform/x86/dell-laptop.c
>
> DELL LAPTOP SMM DRIVER
> M: Guenter Roeck <linux@...ck-us.net>
> +M: Pali Rohár <pali.rohar@...il.com>
> S: Maintained
> -F: drivers/char/i8k.c
> +F: drivers/hwmon/dell-smm-hwmon.c
> F: include/uapi/linux/i8k.h
>
> DELL SYSTEMS MANAGEMENT BASE DRIVER (dcdbas)
> diff --git a/drivers/char/Makefile b/drivers/char/Makefile
> index d06cde26..1d9cf00 100644
> --- a/drivers/char/Makefile
> +++ b/drivers/char/Makefile
> @@ -36,7 +36,6 @@ else
> obj-$(CONFIG_NVRAM) += nvram.o
> endif
> obj-$(CONFIG_TOSHIBA) += toshiba.o
> -obj-$(CONFIG_I8K) += i8k.o
> obj-$(CONFIG_DS1620) += ds1620.o
> obj-$(CONFIG_HW_RANDOM) += hw_random/
> obj-$(CONFIG_PPDEV) += ppdev.o
> diff --git a/drivers/char/i8k.c b/drivers/char/i8k.c
> deleted file mode 100644
> index 24cc4ed..0000000
> --- a/drivers/char/i8k.c
> +++ /dev/null
> @@ -1,1005 +0,0 @@
> -/*
> - * i8k.c -- Linux driver for accessing the SMM BIOS on Dell laptops.
> - *
> - * Copyright (C) 2001 Massimo Dal Zotto <dz@...ian.org>
> - *
> - * Hwmon integration:
> - * Copyright (C) 2011 Jean Delvare <jdelvare@...e.de>
> - * Copyright (C) 2013, 2014 Guenter Roeck <linux@...ck-us.net>
> - * Copyright (C) 2014 Pali Rohár <pali.rohar@...il.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/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/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 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;
> -
> -#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)
> -
> -MODULE_AUTHOR("Massimo Dal Zotto (dz@...ian.org)");
> -MODULE_DESCRIPTION("Driver for accessing SMM BIOS on Dell laptops");
> -MODULE_LICENSE("GPL");
> -
> -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");
> -
> -static bool restricted;
> -module_param(restricted, bool, 0);
> -MODULE_PARM_DESC(restricted, "Allow fan control if SYS_ADMIN capability set");
> -
> -static bool power_status;
> -module_param(power_status, bool, 0600);
> -MODULE_PARM_DESC(power_status, "Report power status in /proc/i8k");
> -
> -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)");
> -
> -static int i8k_open_fs(struct inode *inode, struct file *file);
> -static long i8k_ioctl(struct file *, unsigned int, unsigned long);
> -
> -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,
> -};
> -
> -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(struct smm_regs *regs)
> -{
> - int rc;
> - int eax = regs->eax;
> - cpumask_var_t old_mask;
> -
> - /* SMM requires CPU 0 */
> - if (!alloc_cpumask_var(&old_mask, GFP_KERNEL))
> - return -ENOMEM;
> - cpumask_copy(old_mask, ¤t->cpus_allowed);
> - rc = set_cpus_allowed_ptr(current, cpumask_of(0));
> - if (rc)
> - goto out;
> - if (smp_processor_id() != 0) {
> - rc = -EBUSY;
> - goto out;
> - }
> -
> -#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;
> -
> -out:
> - set_cpus_allowed_ptr(current, old_mask);
> - free_cpumask_var(old_mask);
> - return rc;
> -}
> -
> -/*
> - * 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;
> -}
> -
> -/*
> - * Read the fan status.
> - */
> -static int i8k_get_fan_status(int fan)
> -{
> - struct smm_regs regs = { .eax = I8K_SMM_GET_FAN, };
> -
> - 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, };
> -
> - 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, };
> -
> - regs.ebx = fan & 0xff;
> - return i8k_smm(®s) ? : regs.eax & 0xff;
> -}
> -
> -/*
> - * 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, };
> -
> - 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, };
> -
> - 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;
> -}
> -
> -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:
> - val = (bios_version[0] << 16) |
> - (bios_version[1] << 8) | bios_version[2];
> - break;
> -
> - case I8K_MACHINE_ID:
> - memset(buff, 0, 16);
> - strlcpy(buff, i8k_get_dmi_data(DMI_PRODUCT_SERIAL),
> - 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
> - */
> - return seq_printf(seq, "%s %s %s %d %d %d %d %d %d %d\n",
> - I8K_PROC_FMT,
> - bios_version,
> - i8k_get_dmi_data(DMI_PRODUCT_SERIAL),
> - cpu_temp,
> - left_fan, right_fan, left_speed, right_speed,
> - ac_power, fn_key);
> -}
> -
> -static int i8k_open_fs(struct inode *inode, struct file *file)
> -{
> - return single_open(file, i8k_proc_show, NULL);
> -}
> -
> -
> -/*
> - * Hwmon interface
> - */
> -
> -static ssize_t i8k_hwmon_show_temp_label(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_show_temp(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_show_fan_label(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_show_fan(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_show_pwm(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_set_pwm(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(temp1_input, S_IRUGO, i8k_hwmon_show_temp, NULL, 0);
> -static SENSOR_DEVICE_ATTR(temp1_label, S_IRUGO, i8k_hwmon_show_temp_label, NULL,
> - 0);
> -static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, i8k_hwmon_show_temp, NULL, 1);
> -static SENSOR_DEVICE_ATTR(temp2_label, S_IRUGO, i8k_hwmon_show_temp_label, NULL,
> - 1);
> -static SENSOR_DEVICE_ATTR(temp3_input, S_IRUGO, i8k_hwmon_show_temp, NULL, 2);
> -static SENSOR_DEVICE_ATTR(temp3_label, S_IRUGO, i8k_hwmon_show_temp_label, NULL,
> - 2);
> -static SENSOR_DEVICE_ATTR(temp4_input, S_IRUGO, i8k_hwmon_show_temp, NULL, 3);
> -static SENSOR_DEVICE_ATTR(temp4_label, S_IRUGO, i8k_hwmon_show_temp_label, NULL,
> - 3);
> -static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, i8k_hwmon_show_fan, NULL, 0);
> -static SENSOR_DEVICE_ATTR(fan1_label, S_IRUGO, i8k_hwmon_show_fan_label, NULL,
> - 0);
> -static SENSOR_DEVICE_ATTR(pwm1, S_IRUGO | S_IWUSR, i8k_hwmon_show_pwm,
> - i8k_hwmon_set_pwm, 0);
> -static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, i8k_hwmon_show_fan, NULL,
> - 1);
> -static SENSOR_DEVICE_ATTR(fan2_label, S_IRUGO, i8k_hwmon_show_fan_label, NULL,
> - 1);
> -static SENSOR_DEVICE_ATTR(pwm2, S_IRUGO | S_IWUSR, i8k_hwmon_show_pwm,
> - i8k_hwmon_set_pwm, 1);
> -
> -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 */
> - NULL
> -};
> -
> -static umode_t i8k_is_visible(struct kobject *kobj, struct attribute *attr,
> - int index)
> -{
> - 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;
> -
> - 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 type is OK */
> - err = i8k_get_fan_type(0);
> - if (err >= 0)
> - i8k_hwmon_flags |= I8K_HWMON_HAVE_FAN1;
> -
> - /* Second fan attributes, if fan type is OK */
> - err = i8k_get_fan_type(1);
> - if (err >= 0)
> - i8k_hwmon_flags |= I8K_HWMON_HAVE_FAN2;
> -
> - i8k_hwmon_dev = hwmon_device_register_with_groups(NULL, "i8k", 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 struct dmi_system_id i8k_dmi_table[] __initdata = {
> - {
> - .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],
> - },
> - { }
> -};
> -
> -MODULE_DEVICE_TABLE(dmi, i8k_dmi_table);
> -
> -/*
> - * 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));
> - }
> -
> - strlcpy(bios_version, i8k_get_dmi_data(DMI_BIOS_VERSION),
> - sizeof(bios_version));
> -
> - /*
> - * 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)
> -{
> - struct proc_dir_entry *proc_i8k;
> - int err;
> -
> - /* Are we running on an supported laptop? */
> - if (i8k_probe())
> - return -ENODEV;
> -
> - /* Register the proc entry */
> - proc_i8k = proc_create("i8k", 0, NULL, &i8k_fops);
> - if (!proc_i8k)
> - return -ENOENT;
> -
> - err = i8k_init_hwmon();
> - if (err)
> - goto exit_remove_proc;
> -
> - return 0;
> -
> - exit_remove_proc:
> - remove_proc_entry("i8k", NULL);
> - return err;
> -}
> -
> -static void __exit i8k_exit(void)
> -{
> - hwmon_device_unregister(i8k_hwmon_dev);
> - remove_proc_entry("i8k", NULL);
> -}
> -
> -module_init(i8k_init);
> -module_exit(i8k_exit);
> diff --git a/drivers/hwmon/Makefile b/drivers/hwmon/Makefile
> index 6c94147..1c3e458 100644
> --- a/drivers/hwmon/Makefile
> +++ b/drivers/hwmon/Makefile
> @@ -155,6 +155,7 @@ obj-$(CONFIG_SENSORS_W83L785TS) += w83l785ts.o
> obj-$(CONFIG_SENSORS_W83L786NG) += w83l786ng.o
> obj-$(CONFIG_SENSORS_WM831X) += wm831x-hwmon.o
> obj-$(CONFIG_SENSORS_WM8350) += wm8350-hwmon.o
> +obj-$(CONFIG_I8K) += dell-smm-hwmon.o
>
> obj-$(CONFIG_PMBUS) += pmbus/
>
> diff --git a/drivers/hwmon/dell-smm-hwmon.c b/drivers/hwmon/dell-smm-hwmon.c
> new file mode 100644
> index 0000000..2b04e4f
> --- /dev/null
> +++ b/drivers/hwmon/dell-smm-hwmon.c
> @@ -0,0 +1,1007 @@
> +/*
> + * dell-smm-hwmon.c -- Linux driver for accessing the SMM BIOS on Dell laptops.
> + *
> + * Copyright (C) 2001 Massimo Dal Zotto <dz@...ian.org>
> + *
> + * Hwmon integration:
> + * Copyright (C) 2011 Jean Delvare <jdelvare@...e.de>
> + * Copyright (C) 2013, 2014 Guenter Roeck <linux@...ck-us.net>
> + * Copyright (C) 2014, 2015 Pali Rohár <pali.rohar@...il.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/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/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 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;
> +
> +#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)
> +
> +MODULE_AUTHOR("Massimo Dal Zotto (dz@...ian.org)");
> +MODULE_AUTHOR("Pali Rohár <pali.rohar@...il.com>");
> +MODULE_DESCRIPTION("Driver for accessing SMM BIOS on Dell laptops");
> +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");
> +
> +static bool restricted;
> +module_param(restricted, bool, 0);
> +MODULE_PARM_DESC(restricted, "Allow fan control if SYS_ADMIN capability set");
> +
> +static bool power_status;
> +module_param(power_status, bool, 0600);
> +MODULE_PARM_DESC(power_status, "Report power status in /proc/i8k");
> +
> +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)");
> +
> +static int i8k_open_fs(struct inode *inode, struct file *file);
> +static long i8k_ioctl(struct file *, unsigned int, unsigned long);
> +
> +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,
> +};
> +
> +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(struct smm_regs *regs)
> +{
> + int rc;
> + int eax = regs->eax;
> + cpumask_var_t old_mask;
> +
> + /* SMM requires CPU 0 */
> + if (!alloc_cpumask_var(&old_mask, GFP_KERNEL))
> + return -ENOMEM;
> + cpumask_copy(old_mask, ¤t->cpus_allowed);
> + rc = set_cpus_allowed_ptr(current, cpumask_of(0));
> + if (rc)
> + goto out;
> + if (smp_processor_id() != 0) {
> + rc = -EBUSY;
> + goto out;
> + }
> +
> +#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;
> +
> +out:
> + set_cpus_allowed_ptr(current, old_mask);
> + free_cpumask_var(old_mask);
> + return rc;
> +}
> +
> +/*
> + * 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;
> +}
> +
> +/*
> + * Read the fan status.
> + */
> +static int i8k_get_fan_status(int fan)
> +{
> + struct smm_regs regs = { .eax = I8K_SMM_GET_FAN, };
> +
> + 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, };
> +
> + 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, };
> +
> + regs.ebx = fan & 0xff;
> + return i8k_smm(®s) ? : regs.eax & 0xff;
> +}
> +
> +/*
> + * 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, };
> +
> + 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, };
> +
> + 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;
> +}
> +
> +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:
> + val = (bios_version[0] << 16) |
> + (bios_version[1] << 8) | bios_version[2];
> + break;
> +
> + case I8K_MACHINE_ID:
> + memset(buff, 0, 16);
> + strlcpy(buff, i8k_get_dmi_data(DMI_PRODUCT_SERIAL),
> + 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
> + */
> + return seq_printf(seq, "%s %s %s %d %d %d %d %d %d %d\n",
> + I8K_PROC_FMT,
> + bios_version,
> + i8k_get_dmi_data(DMI_PRODUCT_SERIAL),
> + cpu_temp,
> + left_fan, right_fan, left_speed, right_speed,
> + ac_power, fn_key);
> +}
> +
> +static int i8k_open_fs(struct inode *inode, struct file *file)
> +{
> + return single_open(file, i8k_proc_show, NULL);
> +}
> +
> +
> +/*
> + * Hwmon interface
> + */
> +
> +static ssize_t i8k_hwmon_show_temp_label(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_show_temp(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_show_fan_label(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_show_fan(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_show_pwm(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_set_pwm(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(temp1_input, S_IRUGO, i8k_hwmon_show_temp, NULL, 0);
> +static SENSOR_DEVICE_ATTR(temp1_label, S_IRUGO, i8k_hwmon_show_temp_label, NULL,
> + 0);
> +static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, i8k_hwmon_show_temp, NULL, 1);
> +static SENSOR_DEVICE_ATTR(temp2_label, S_IRUGO, i8k_hwmon_show_temp_label, NULL,
> + 1);
> +static SENSOR_DEVICE_ATTR(temp3_input, S_IRUGO, i8k_hwmon_show_temp, NULL, 2);
> +static SENSOR_DEVICE_ATTR(temp3_label, S_IRUGO, i8k_hwmon_show_temp_label, NULL,
> + 2);
> +static SENSOR_DEVICE_ATTR(temp4_input, S_IRUGO, i8k_hwmon_show_temp, NULL, 3);
> +static SENSOR_DEVICE_ATTR(temp4_label, S_IRUGO, i8k_hwmon_show_temp_label, NULL,
> + 3);
> +static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, i8k_hwmon_show_fan, NULL, 0);
> +static SENSOR_DEVICE_ATTR(fan1_label, S_IRUGO, i8k_hwmon_show_fan_label, NULL,
> + 0);
> +static SENSOR_DEVICE_ATTR(pwm1, S_IRUGO | S_IWUSR, i8k_hwmon_show_pwm,
> + i8k_hwmon_set_pwm, 0);
> +static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, i8k_hwmon_show_fan, NULL,
> + 1);
> +static SENSOR_DEVICE_ATTR(fan2_label, S_IRUGO, i8k_hwmon_show_fan_label, NULL,
> + 1);
> +static SENSOR_DEVICE_ATTR(pwm2, S_IRUGO | S_IWUSR, i8k_hwmon_show_pwm,
> + i8k_hwmon_set_pwm, 1);
> +
> +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 */
> + NULL
> +};
> +
> +static umode_t i8k_is_visible(struct kobject *kobj, struct attribute *attr,
> + int index)
> +{
> + 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;
> +
> + 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 type is OK */
> + err = i8k_get_fan_type(0);
> + if (err >= 0)
> + i8k_hwmon_flags |= I8K_HWMON_HAVE_FAN1;
> +
> + /* Second fan attributes, if fan type is OK */
> + err = i8k_get_fan_type(1);
> + if (err >= 0)
> + i8k_hwmon_flags |= I8K_HWMON_HAVE_FAN2;
> +
> + i8k_hwmon_dev = hwmon_device_register_with_groups(NULL, "i8k", 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 struct dmi_system_id i8k_dmi_table[] __initdata = {
> + {
> + .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],
> + },
> + { }
> +};
> +
> +MODULE_DEVICE_TABLE(dmi, i8k_dmi_table);
> +
> +/*
> + * 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));
> + }
> +
> + strlcpy(bios_version, i8k_get_dmi_data(DMI_BIOS_VERSION),
> + sizeof(bios_version));
> +
> + /*
> + * 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)
> +{
> + struct proc_dir_entry *proc_i8k;
> + int err;
> +
> + /* Are we running on an supported laptop? */
> + if (i8k_probe())
> + return -ENODEV;
> +
> + /* Register the proc entry */
> + proc_i8k = proc_create("i8k", 0, NULL, &i8k_fops);
> + if (!proc_i8k)
> + return -ENOENT;
> +
> + err = i8k_init_hwmon();
> + if (err)
> + goto exit_remove_proc;
> +
> + return 0;
> +
> + exit_remove_proc:
> + remove_proc_entry("i8k", NULL);
> + return err;
> +}
> +
> +static void __exit i8k_exit(void)
> +{
> + hwmon_device_unregister(i8k_hwmon_dev);
> + remove_proc_entry("i8k", NULL);
> +}
> +
> +module_init(i8k_init);
> +module_exit(i8k_exit);
>
--
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