From mboxrd@z Thu Jan 1 00:00:00 1970 From: =?UTF-8?q?Pali=20Roh=C3=A1r?= Date: Sun, 29 Mar 2015 12:57:38 +0000 Subject: [lm-sensors] [PATCH v2 1/2] hwmon: Rename i8k driver to dell-smm-hwmon and move it to hwmon tree Message-Id: <1427633859-18596-2-git-send-email-pali.rohar@gmail.com> List-Id: References: <1427538255-10860-1-git-send-email-pali.rohar@gmail.com> <1427633859-18596-1-git-send-email-pali.rohar@gmail.com> In-Reply-To: <1427633859-18596-1-git-send-email-pali.rohar@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: Guenter Roeck , Arnd Bergmann , Greg Kroah-Hartman , Jean Delvare Cc: Steven Honeyman , Valdis.Kletnieks@vt.edu, Jochen Eisinger , Gabriele Mazzotta , linux-kernel@vger.kernel.org, lm-sensors@lm-sensors.org, =?UTF-8?q?Pali=20Roh=C3=A1r?= VGhpcyBjb21taXQgbW92ZXMgaThrIGRyaXZlciB0byBod21vbiB0cmVlIHVuZGVyIG5hbWUgZGVs bC1zbW0taHdtb24gd2hpY2ggaXMKYmV0dGVyIG5hbWUgdGhlbiBhYmJyZXZpYXRpb24gaThrLiBG 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(majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752811AbbC2M6O (ORCPT ); Sun, 29 Mar 2015 08:58:14 -0400 Received: from mail-wg0-f47.google.com ([74.125.82.47]:33231 "EHLO mail-wg0-f47.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752760AbbC2M6C (ORCPT ); Sun, 29 Mar 2015 08:58:02 -0400 From: =?UTF-8?q?Pali=20Roh=C3=A1r?= To: Guenter Roeck , Arnd Bergmann , "Greg Kroah-Hartman" , Jean Delvare Cc: Steven Honeyman , Valdis.Kletnieks@vt.edu, Jochen Eisinger , Gabriele Mazzotta , linux-kernel@vger.kernel.org, lm-sensors@lm-sensors.org, =?UTF-8?q?Pali=20Roh=C3=A1r?= Subject: [PATCH v2 1/2] hwmon: Rename i8k driver to dell-smm-hwmon and move it to hwmon tree Date: Sun, 29 Mar 2015 14:57:38 +0200 Message-Id: <1427633859-18596-2-git-send-email-pali.rohar@gmail.com> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1427633859-18596-1-git-send-email-pali.rohar@gmail.com> References: <1427538255-10860-1-git-send-email-pali.rohar@gmail.com> <1427633859-18596-1-git-send-email-pali.rohar@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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 and remove Guenter Roeck from list who is implicit maintainer all hwmon drivers. Signed-off-by: Pali Rohár --- MAINTAINERS | 4 +- 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(+), 1008 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..e54a07e 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -3063,9 +3063,9 @@ S: Maintained F: drivers/platform/x86/dell-laptop.c DELL LAPTOP SMM DRIVER -M: Guenter Roeck +M: Pali Rohár 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 - * - * Hwmon integration: - * Copyright (C) 2011 Jean Delvare - * Copyright (C) 2013, 2014 Guenter Roeck - * Copyright (C) 2014 Pali Rohár - * - * 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 -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include - -#include - -#define I8K_SMM_FN_STATUS 0x0025 -#define I8K_SMM_POWER_STATUS 0x0069 -#define I8K_SMM_SET_FAN 0x01a3 -#define I8K_SMM_GET_FAN 0x00a3 -#define I8K_SMM_GET_SPEED 0x02a3 -#define I8K_SMM_GET_FAN_TYPE 0x03a3 -#define I8K_SMM_GET_NOM_SPEED 0x04a3 -#define I8K_SMM_GET_TEMP 0x10a3 -#define I8K_SMM_GET_TEMP_TYPE 0x11a3 -#define I8K_SMM_GET_DELL_SIG1 0xfea3 -#define I8K_SMM_GET_DELL_SIG2 0xffa3 - -#define I8K_FAN_MULT 30 -#define I8K_FAN_MAX_RPM 30000 -#define I8K_MAX_TEMP 127 - -#define I8K_FN_NONE 0x00 -#define I8K_FN_UP 0x01 -#define I8K_FN_DOWN 0x02 -#define I8K_FN_MUTE 0x04 -#define I8K_FN_MASK 0x07 -#define I8K_FN_SHIFT 8 - -#define I8K_POWER_AC 0x05 -#define I8K_POWER_BATTERY 0x01 - -static DEFINE_MUTEX(i8k_mutex); -static char bios_version[4]; -static 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@debian.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 + * + * Hwmon integration: + * Copyright (C) 2011 Jean Delvare + * Copyright (C) 2013, 2014 Guenter Roeck + * Copyright (C) 2014, 2015 Pali Rohár + * + * 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 +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include + +#define I8K_SMM_FN_STATUS 0x0025 +#define I8K_SMM_POWER_STATUS 0x0069 +#define I8K_SMM_SET_FAN 0x01a3 +#define I8K_SMM_GET_FAN 0x00a3 +#define I8K_SMM_GET_SPEED 0x02a3 +#define I8K_SMM_GET_FAN_TYPE 0x03a3 +#define I8K_SMM_GET_NOM_SPEED 0x04a3 +#define I8K_SMM_GET_TEMP 0x10a3 +#define I8K_SMM_GET_TEMP_TYPE 0x11a3 +#define I8K_SMM_GET_DELL_SIG1 0xfea3 +#define I8K_SMM_GET_DELL_SIG2 0xffa3 + +#define I8K_FAN_MULT 30 +#define I8K_FAN_MAX_RPM 30000 +#define I8K_MAX_TEMP 127 + +#define I8K_FN_NONE 0x00 +#define I8K_FN_UP 0x01 +#define I8K_FN_DOWN 0x02 +#define I8K_FN_MUTE 0x04 +#define I8K_FN_MASK 0x07 +#define I8K_FN_SHIFT 8 + +#define I8K_POWER_AC 0x05 +#define I8K_POWER_BATTERY 0x01 + +static DEFINE_MUTEX(i8k_mutex); +static char bios_version[4]; +static 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@debian.org)"); +MODULE_AUTHOR("Pali Rohár "); +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); -- 1.7.9.5