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https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-28 20:02:17 +00:00
![Alexey Dobriyan](/assets/img/avatar_default.png)
The most notable change is DEFINE_SHOW_ATTRIBUTE macro split in seq_file.h. Conversion rule is: llseek => proc_lseek unlocked_ioctl => proc_ioctl xxx => proc_xxx delete ".owner = THIS_MODULE" line [akpm@linux-foundation.org: fix drivers/isdn/capi/kcapi_proc.c] [sfr@canb.auug.org.au: fix kernel/sched/psi.c] Link: http://lkml.kernel.org/r/20200122180545.36222f50@canb.auug.org.au Link: http://lkml.kernel.org/r/20191225172546.GB13378@avx2 Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
1341 lines
32 KiB
C
1341 lines
32 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* dell-smm-hwmon.c -- Linux driver for accessing the SMM BIOS on Dell laptops.
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*
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* Copyright (C) 2001 Massimo Dal Zotto <dz@debian.org>
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*
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* Hwmon integration:
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* Copyright (C) 2011 Jean Delvare <jdelvare@suse.de>
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* Copyright (C) 2013, 2014 Guenter Roeck <linux@roeck-us.net>
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* Copyright (C) 2014, 2015 Pali Rohár <pali.rohar@gmail.com>
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*/
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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#include <linux/cpu.h>
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#include <linux/delay.h>
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#include <linux/module.h>
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#include <linux/types.h>
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#include <linux/init.h>
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#include <linux/proc_fs.h>
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#include <linux/seq_file.h>
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#include <linux/dmi.h>
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#include <linux/capability.h>
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#include <linux/mutex.h>
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#include <linux/hwmon.h>
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#include <linux/hwmon-sysfs.h>
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#include <linux/uaccess.h>
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#include <linux/io.h>
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#include <linux/sched.h>
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#include <linux/ctype.h>
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#include <linux/smp.h>
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#include <linux/i8k.h>
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#define I8K_SMM_FN_STATUS 0x0025
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#define I8K_SMM_POWER_STATUS 0x0069
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#define I8K_SMM_SET_FAN 0x01a3
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#define I8K_SMM_GET_FAN 0x00a3
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#define I8K_SMM_GET_SPEED 0x02a3
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#define I8K_SMM_GET_FAN_TYPE 0x03a3
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#define I8K_SMM_GET_NOM_SPEED 0x04a3
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#define I8K_SMM_GET_TEMP 0x10a3
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#define I8K_SMM_GET_TEMP_TYPE 0x11a3
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#define I8K_SMM_GET_DELL_SIG1 0xfea3
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#define I8K_SMM_GET_DELL_SIG2 0xffa3
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#define I8K_FAN_MULT 30
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#define I8K_FAN_MAX_RPM 30000
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#define I8K_MAX_TEMP 127
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#define I8K_FN_NONE 0x00
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#define I8K_FN_UP 0x01
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#define I8K_FN_DOWN 0x02
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#define I8K_FN_MUTE 0x04
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#define I8K_FN_MASK 0x07
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#define I8K_FN_SHIFT 8
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#define I8K_POWER_AC 0x05
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#define I8K_POWER_BATTERY 0x01
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static DEFINE_MUTEX(i8k_mutex);
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static char bios_version[4];
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static char bios_machineid[16];
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static struct device *i8k_hwmon_dev;
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static u32 i8k_hwmon_flags;
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static uint i8k_fan_mult = I8K_FAN_MULT;
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static uint i8k_pwm_mult;
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static uint i8k_fan_max = I8K_FAN_HIGH;
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static bool disallow_fan_type_call;
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static bool disallow_fan_support;
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static unsigned int manual_fan;
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static unsigned int auto_fan;
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#define I8K_HWMON_HAVE_TEMP1 (1 << 0)
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#define I8K_HWMON_HAVE_TEMP2 (1 << 1)
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#define I8K_HWMON_HAVE_TEMP3 (1 << 2)
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#define I8K_HWMON_HAVE_TEMP4 (1 << 3)
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#define I8K_HWMON_HAVE_TEMP5 (1 << 4)
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#define I8K_HWMON_HAVE_TEMP6 (1 << 5)
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#define I8K_HWMON_HAVE_TEMP7 (1 << 6)
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#define I8K_HWMON_HAVE_TEMP8 (1 << 7)
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#define I8K_HWMON_HAVE_TEMP9 (1 << 8)
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#define I8K_HWMON_HAVE_TEMP10 (1 << 9)
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#define I8K_HWMON_HAVE_FAN1 (1 << 10)
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#define I8K_HWMON_HAVE_FAN2 (1 << 11)
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#define I8K_HWMON_HAVE_FAN3 (1 << 12)
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MODULE_AUTHOR("Massimo Dal Zotto (dz@debian.org)");
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MODULE_AUTHOR("Pali Rohár <pali.rohar@gmail.com>");
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MODULE_DESCRIPTION("Dell laptop SMM BIOS hwmon driver");
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MODULE_LICENSE("GPL");
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MODULE_ALIAS("i8k");
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static bool force;
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module_param(force, bool, 0);
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MODULE_PARM_DESC(force, "Force loading without checking for supported models");
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static bool ignore_dmi;
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module_param(ignore_dmi, bool, 0);
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MODULE_PARM_DESC(ignore_dmi, "Continue probing hardware even if DMI data does not match");
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#if IS_ENABLED(CONFIG_I8K)
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static bool restricted = true;
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module_param(restricted, bool, 0);
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MODULE_PARM_DESC(restricted, "Restrict fan control and serial number to CAP_SYS_ADMIN (default: 1)");
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static bool power_status;
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module_param(power_status, bool, 0600);
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MODULE_PARM_DESC(power_status, "Report power status in /proc/i8k (default: 0)");
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#endif
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static uint fan_mult;
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module_param(fan_mult, uint, 0);
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MODULE_PARM_DESC(fan_mult, "Factor to multiply fan speed with (default: autodetect)");
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static uint fan_max;
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module_param(fan_max, uint, 0);
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MODULE_PARM_DESC(fan_max, "Maximum configurable fan speed (default: autodetect)");
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struct smm_regs {
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unsigned int eax;
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unsigned int ebx __packed;
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unsigned int ecx __packed;
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unsigned int edx __packed;
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unsigned int esi __packed;
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unsigned int edi __packed;
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};
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static inline const char *i8k_get_dmi_data(int field)
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{
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const char *dmi_data = dmi_get_system_info(field);
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return dmi_data && *dmi_data ? dmi_data : "?";
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}
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/*
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* Call the System Management Mode BIOS. Code provided by Jonathan Buzzard.
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*/
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static int i8k_smm_func(void *par)
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{
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int rc;
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struct smm_regs *regs = par;
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int eax = regs->eax;
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#ifdef DEBUG
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int ebx = regs->ebx;
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unsigned long duration;
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ktime_t calltime, delta, rettime;
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calltime = ktime_get();
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#endif
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/* SMM requires CPU 0 */
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if (smp_processor_id() != 0)
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return -EBUSY;
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#if defined(CONFIG_X86_64)
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asm volatile("pushq %%rax\n\t"
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"movl 0(%%rax),%%edx\n\t"
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"pushq %%rdx\n\t"
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"movl 4(%%rax),%%ebx\n\t"
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"movl 8(%%rax),%%ecx\n\t"
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"movl 12(%%rax),%%edx\n\t"
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"movl 16(%%rax),%%esi\n\t"
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"movl 20(%%rax),%%edi\n\t"
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"popq %%rax\n\t"
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"out %%al,$0xb2\n\t"
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"out %%al,$0x84\n\t"
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"xchgq %%rax,(%%rsp)\n\t"
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"movl %%ebx,4(%%rax)\n\t"
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"movl %%ecx,8(%%rax)\n\t"
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"movl %%edx,12(%%rax)\n\t"
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"movl %%esi,16(%%rax)\n\t"
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"movl %%edi,20(%%rax)\n\t"
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"popq %%rdx\n\t"
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"movl %%edx,0(%%rax)\n\t"
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"pushfq\n\t"
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"popq %%rax\n\t"
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"andl $1,%%eax\n"
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: "=a"(rc)
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: "a"(regs)
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: "%ebx", "%ecx", "%edx", "%esi", "%edi", "memory");
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#else
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asm volatile("pushl %%eax\n\t"
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"movl 0(%%eax),%%edx\n\t"
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"push %%edx\n\t"
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"movl 4(%%eax),%%ebx\n\t"
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"movl 8(%%eax),%%ecx\n\t"
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"movl 12(%%eax),%%edx\n\t"
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"movl 16(%%eax),%%esi\n\t"
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"movl 20(%%eax),%%edi\n\t"
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"popl %%eax\n\t"
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"out %%al,$0xb2\n\t"
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"out %%al,$0x84\n\t"
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"xchgl %%eax,(%%esp)\n\t"
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"movl %%ebx,4(%%eax)\n\t"
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"movl %%ecx,8(%%eax)\n\t"
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"movl %%edx,12(%%eax)\n\t"
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"movl %%esi,16(%%eax)\n\t"
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"movl %%edi,20(%%eax)\n\t"
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"popl %%edx\n\t"
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"movl %%edx,0(%%eax)\n\t"
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"lahf\n\t"
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"shrl $8,%%eax\n\t"
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"andl $1,%%eax\n"
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: "=a"(rc)
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: "a"(regs)
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: "%ebx", "%ecx", "%edx", "%esi", "%edi", "memory");
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#endif
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if (rc != 0 || (regs->eax & 0xffff) == 0xffff || regs->eax == eax)
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rc = -EINVAL;
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#ifdef DEBUG
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rettime = ktime_get();
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delta = ktime_sub(rettime, calltime);
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duration = ktime_to_ns(delta) >> 10;
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pr_debug("smm(0x%.4x 0x%.4x) = 0x%.4x (took %7lu usecs)\n", eax, ebx,
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(rc ? 0xffff : regs->eax & 0xffff), duration);
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#endif
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return rc;
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}
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/*
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* Call the System Management Mode BIOS.
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*/
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static int i8k_smm(struct smm_regs *regs)
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{
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int ret;
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get_online_cpus();
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ret = smp_call_on_cpu(0, i8k_smm_func, regs, true);
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put_online_cpus();
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return ret;
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}
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/*
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* Read the fan status.
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*/
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static int i8k_get_fan_status(int fan)
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{
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struct smm_regs regs = { .eax = I8K_SMM_GET_FAN, };
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if (disallow_fan_support)
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return -EINVAL;
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regs.ebx = fan & 0xff;
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return i8k_smm(®s) ? : regs.eax & 0xff;
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}
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/*
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* Read the fan speed in RPM.
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*/
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static int i8k_get_fan_speed(int fan)
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{
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struct smm_regs regs = { .eax = I8K_SMM_GET_SPEED, };
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if (disallow_fan_support)
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return -EINVAL;
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regs.ebx = fan & 0xff;
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return i8k_smm(®s) ? : (regs.eax & 0xffff) * i8k_fan_mult;
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}
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/*
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* Read the fan type.
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*/
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static int _i8k_get_fan_type(int fan)
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{
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struct smm_regs regs = { .eax = I8K_SMM_GET_FAN_TYPE, };
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if (disallow_fan_support || disallow_fan_type_call)
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return -EINVAL;
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regs.ebx = fan & 0xff;
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return i8k_smm(®s) ? : regs.eax & 0xff;
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}
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static int i8k_get_fan_type(int fan)
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{
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/* I8K_SMM_GET_FAN_TYPE SMM call is expensive, so cache values */
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static int types[3] = { INT_MIN, INT_MIN, INT_MIN };
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if (types[fan] == INT_MIN)
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types[fan] = _i8k_get_fan_type(fan);
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return types[fan];
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}
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/*
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* Read the fan nominal rpm for specific fan speed.
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*/
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static int i8k_get_fan_nominal_speed(int fan, int speed)
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{
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struct smm_regs regs = { .eax = I8K_SMM_GET_NOM_SPEED, };
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if (disallow_fan_support)
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return -EINVAL;
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regs.ebx = (fan & 0xff) | (speed << 8);
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return i8k_smm(®s) ? : (regs.eax & 0xffff) * i8k_fan_mult;
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}
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/*
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* Enable or disable automatic BIOS fan control support
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*/
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static int i8k_enable_fan_auto_mode(bool enable)
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{
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struct smm_regs regs = { };
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if (disallow_fan_support)
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return -EINVAL;
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regs.eax = enable ? auto_fan : manual_fan;
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return i8k_smm(®s);
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}
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/*
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* Set the fan speed (off, low, high). Returns the new fan status.
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*/
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static int i8k_set_fan(int fan, int speed)
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{
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struct smm_regs regs = { .eax = I8K_SMM_SET_FAN, };
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if (disallow_fan_support)
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return -EINVAL;
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speed = (speed < 0) ? 0 : ((speed > i8k_fan_max) ? i8k_fan_max : speed);
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regs.ebx = (fan & 0xff) | (speed << 8);
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return i8k_smm(®s) ? : i8k_get_fan_status(fan);
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}
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static int i8k_get_temp_type(int sensor)
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{
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struct smm_regs regs = { .eax = I8K_SMM_GET_TEMP_TYPE, };
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regs.ebx = sensor & 0xff;
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return i8k_smm(®s) ? : regs.eax & 0xff;
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}
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/*
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* Read the cpu temperature.
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*/
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static int _i8k_get_temp(int sensor)
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{
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struct smm_regs regs = {
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.eax = I8K_SMM_GET_TEMP,
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.ebx = sensor & 0xff,
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};
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return i8k_smm(®s) ? : regs.eax & 0xff;
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}
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static int i8k_get_temp(int sensor)
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{
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int temp = _i8k_get_temp(sensor);
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/*
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* Sometimes the temperature sensor returns 0x99, which is out of range.
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* In this case we retry (once) before returning an error.
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# 1003655137 00000058 00005a4b
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# 1003655138 00000099 00003a80 <--- 0x99 = 153 degrees
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# 1003655139 00000054 00005c52
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*/
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if (temp == 0x99) {
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msleep(100);
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temp = _i8k_get_temp(sensor);
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}
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/*
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* Return -ENODATA for all invalid temperatures.
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*
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* Known instances are the 0x99 value as seen above as well as
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* 0xc1 (193), which may be returned when trying to read the GPU
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* temperature if the system supports a GPU and it is currently
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* turned off.
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*/
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if (temp > I8K_MAX_TEMP)
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return -ENODATA;
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return temp;
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}
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static int i8k_get_dell_signature(int req_fn)
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{
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struct smm_regs regs = { .eax = req_fn, };
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int rc;
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rc = i8k_smm(®s);
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if (rc < 0)
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return rc;
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return regs.eax == 1145651527 && regs.edx == 1145392204 ? 0 : -1;
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}
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#if IS_ENABLED(CONFIG_I8K)
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/*
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* Read the Fn key status.
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*/
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static int i8k_get_fn_status(void)
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{
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struct smm_regs regs = { .eax = I8K_SMM_FN_STATUS, };
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int rc;
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rc = i8k_smm(®s);
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if (rc < 0)
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return rc;
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switch ((regs.eax >> I8K_FN_SHIFT) & I8K_FN_MASK) {
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case I8K_FN_UP:
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return I8K_VOL_UP;
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case I8K_FN_DOWN:
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return I8K_VOL_DOWN;
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case I8K_FN_MUTE:
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return I8K_VOL_MUTE;
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default:
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return 0;
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}
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}
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/*
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* Read the power status.
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*/
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static int i8k_get_power_status(void)
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{
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struct smm_regs regs = { .eax = I8K_SMM_POWER_STATUS, };
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int rc;
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rc = i8k_smm(®s);
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if (rc < 0)
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return rc;
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return (regs.eax & 0xff) == I8K_POWER_AC ? I8K_AC : I8K_BATTERY;
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}
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/*
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* Procfs interface
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*/
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static int
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i8k_ioctl_unlocked(struct file *fp, unsigned int cmd, unsigned long arg)
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{
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int val = 0;
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int speed;
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unsigned char buff[16];
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int __user *argp = (int __user *)arg;
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if (!argp)
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return -EINVAL;
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switch (cmd) {
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case I8K_BIOS_VERSION:
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if (!isdigit(bios_version[0]) || !isdigit(bios_version[1]) ||
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!isdigit(bios_version[2]))
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return -EINVAL;
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val = (bios_version[0] << 16) |
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(bios_version[1] << 8) | bios_version[2];
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break;
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case I8K_MACHINE_ID:
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if (restricted && !capable(CAP_SYS_ADMIN))
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return -EPERM;
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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 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 void __init i8k_init_procfs(void)
|
|
{
|
|
/* Register the proc entry */
|
|
proc_create("i8k", 0, NULL, &i8k_proc_ops);
|
|
}
|
|
|
|
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 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 >= 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 <= 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 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"),
|
|
},
|
|
},
|
|
{ }
|
|
};
|
|
|
|
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 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);
|