--- /dev/null
+Index: linux-2.6.20-rc4/drivers/hwmon/coretemp.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ linux-2.6.20-rc4/drivers/hwmon/coretemp.c 2007-01-14 21:49:52.764871760 +0100
+@@ -0,0 +1,472 @@
++/*
++ * coretemp.c - Linux kernel module for hardware monitoring
++ *
++ * Copyright (C) 2006 Rudolf Marek <r.marek@assembler.cz>
++ *
++ * Inspired from many hwmon drivers
++ *
++ * 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 of the License, 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.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
++ * 02110-1301 USA.
++ */
++
++#include <linux/module.h>
++#include <linux/delay.h>
++#include <linux/init.h>
++#include <linux/slab.h>
++#include <linux/jiffies.h>
++#include <linux/hwmon.h>
++#include <linux/sysfs.h>
++#include <linux/hwmon-sysfs.h>
++#include <linux/err.h>
++#include <linux/mutex.h>
++#include <linux/list.h>
++#include <linux/platform_device.h>
++#include <linux/cpu.h>
++#include <asm/msr.h>
++#include <asm/processor.h>
++
++#define DRVNAME "coretemp"
++
++/*
++ Following part ripped from the msr.c. It should be merged with generic MSR
++ infrastructure (once ready)
++*/
++
++static inline int rdmsr_eio(u32 reg, u32 *eax, u32 *edx)
++{
++ int err;
++
++ err = rdmsr_safe(reg, eax, edx);
++ if (err)
++ err = -EIO;
++ return err;
++}
++
++#ifdef CONFIG_SMP
++
++struct msr_command {
++ int cpu;
++ int err;
++ u32 reg;
++ u32 data[2];
++};
++
++static void msr_smp_rdmsr(void *cmd_block)
++{
++ struct msr_command *cmd = (struct msr_command *)cmd_block;
++
++ if (cmd->cpu == smp_processor_id())
++ cmd->err = rdmsr_eio(cmd->reg, &cmd->data[0], &cmd->data[1]);
++}
++
++static inline int msr_read(int cpu, u32 reg, u32 * eax, u32 * edx)
++{
++ struct msr_command cmd;
++ int ret;
++
++ preempt_disable();
++ if (cpu == smp_processor_id()) {
++ ret = rdmsr_eio(reg, eax, edx);
++ } else {
++ cmd.cpu = cpu;
++ cmd.reg = reg;
++
++ smp_call_function(msr_smp_rdmsr, &cmd, 1, 1);
++
++ *eax = cmd.data[0];
++ *edx = cmd.data[1];
++
++ ret = cmd.err;
++ }
++ preempt_enable();
++ return ret;
++}
++
++#else /* ! CONFIG_SMP */
++
++static inline int msr_read(int cpu, u32 reg, u32 *eax, u32 *edx)
++{
++ return rdmsr_eio(reg, eax, edx);
++}
++
++#endif /* ! CONFIG_SMP */
++
++/* cut here */
++
++typedef enum { SHOW_TEMP, SHOW_TJMAX, SHOW_LABEL, SHOW_NAME } SHOW;
++
++/*
++ * Functions declaration
++ */
++
++static struct coretemp_data *coretemp_update_device(struct device *dev);
++
++struct coretemp_data {
++ struct class_device *class_dev;
++ struct mutex update_lock;
++ const char *name;
++ u32 id;
++ char valid; /* zero until following fields are valid */
++ unsigned long last_updated; /* in jiffies */
++ int temp;
++ int tjmax;
++ /* registers values */
++ u32 therm_status;
++};
++
++static struct coretemp_data *coretemp_update_device(struct device *dev);
++
++/*
++ * Sysfs stuff
++ */
++
++static ssize_t show_name(struct device *dev, struct device_attribute
++ *devattr, char *buf)
++{
++ int ret;
++ struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
++ struct coretemp_data *data = dev_get_drvdata(dev);
++
++ if (attr->index == SHOW_NAME)
++ ret = sprintf(buf, "%s\n", data->name);
++ else /* show label */
++ ret = sprintf(buf, "Core %d\n", data->id);
++ return ret;
++}
++
++static ssize_t show_alarm(struct device *dev, struct device_attribute
++ *devattr, char *buf)
++{
++ struct coretemp_data *data = coretemp_update_device(dev);
++ /* read the Out-of-spec log, never clear */
++ return sprintf(buf, "%d\n", (data->therm_status >> 5) & 1);
++}
++
++static ssize_t show_temp(struct device *dev,
++ struct device_attribute *devattr, char *buf)
++{
++ struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
++ struct coretemp_data *data = coretemp_update_device(dev);
++ return sprintf(buf, "%d\n",
++ attr->index ==
++ SHOW_TEMP ? data->temp : data->tjmax);
++}
++
++static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL,
++ SHOW_TEMP);
++static SENSOR_DEVICE_ATTR(temp1_crit, S_IRUGO, show_temp, NULL,
++ SHOW_TJMAX);
++static DEVICE_ATTR(temp1_crit_alarm, S_IRUGO, show_alarm, NULL);
++static SENSOR_DEVICE_ATTR(temp1_label, S_IRUGO, show_name, NULL, SHOW_LABEL);
++static SENSOR_DEVICE_ATTR(name, S_IRUGO, show_name, NULL, SHOW_NAME);
++
++static struct attribute *coretemp_attributes[] = {
++ &sensor_dev_attr_name.dev_attr.attr,
++ &sensor_dev_attr_temp1_label.dev_attr.attr,
++ &dev_attr_temp1_crit_alarm.attr,
++ &sensor_dev_attr_temp1_input.dev_attr.attr,
++ &sensor_dev_attr_temp1_crit.dev_attr.attr,
++ NULL
++};
++
++static const struct attribute_group coretemp_group = {
++ .attrs = coretemp_attributes,
++};
++
++static struct coretemp_data *coretemp_update_device(struct device *dev)
++{
++ struct coretemp_data *data = dev_get_drvdata(dev);
++
++ mutex_lock(&data->update_lock);
++
++ if (!data->valid || time_after(jiffies, data->last_updated + HZ)) {
++ u32 eax, edx;
++
++ data->valid = 0;
++ msr_read(data->id, MSR_IA32_THERM_STATUS, &eax, &edx);
++ data->therm_status = eax;
++
++ /* update only if data has been valid */
++ if (eax & 0x80000000) {
++ data->temp = data->tjmax - (((data->therm_status >> 16)
++ & 0x7f) * 1000);
++ data->valid = 1;
++ }
++ data->last_updated = jiffies;
++ }
++
++ mutex_unlock(&data->update_lock);
++ return data;
++}
++
++static int __devinit coretemp_probe(struct platform_device *pdev)
++{
++ struct coretemp_data *data;
++ struct cpuinfo_x86 *c = &(cpu_data)[pdev->id];
++ int err;
++ u32 eax, edx;
++
++ if (!(data = kzalloc(sizeof(struct coretemp_data), GFP_KERNEL))) {
++ err = -ENOMEM;
++ dev_err(&pdev->dev, "Out of memory\n");
++ goto exit;
++ }
++
++ data->id = pdev->id;
++ data->name = "coretemp";
++ mutex_init(&data->update_lock);
++ /* Tjmax default is 100C */
++ data->tjmax = 100000;
++
++ /* Some processors have Tjmax 85 following magic should detect it
++ Intel won't disclose the information without signed NDA, but
++ individuals cannot sign it. Catch(ed) 22.
++ */
++
++ if (((c->x86_model == 0xf) && (c->x86_mask > 3 )) ||
++ (c->x86_model == 0xe)) {
++
++ err = msr_read(data->id, 0xee, &eax, &edx);
++ if (err) {
++ dev_warn(&pdev->dev,
++ "Unable to access MSR 0xEE, Tjmax left at %d\n",
++ data->tjmax);
++ } else if (eax & 0x40000000) {
++ data->tjmax = 85000;
++ }
++ }
++
++ /* test if we can access the THERM_STATUS MSR */
++ err = msr_read(data->id, MSR_IA32_THERM_STATUS, &eax, &edx);
++
++ if (err) {
++ dev_err(&pdev->dev,
++ "Unable to access THERM_STATUS MSR, giving up\n");
++ goto exit_free;
++ }
++ platform_set_drvdata(pdev, data);
++
++ if ((err = sysfs_create_group(&pdev->dev.kobj, &coretemp_group)))
++ goto exit_free;
++
++ data->class_dev = hwmon_device_register(&pdev->dev);
++ if (IS_ERR(data->class_dev)) {
++ err = PTR_ERR(data->class_dev);
++ dev_err(&pdev->dev, "Class registration failed (%d)\n",
++ err);
++ goto exit_class;
++ }
++
++ dev_warn(&pdev->dev, "This driver uses undocumented features of Core "
++ "CPU (Intel will not disclose the information to "
++ "individuals). Temperature might be wrong!\n");
++ return 0;
++
++exit_class:
++ sysfs_remove_group(&pdev->dev.kobj, &coretemp_group);
++exit_free:
++ kfree(data);
++exit:
++ return err;
++}
++
++static int __devexit coretemp_remove(struct platform_device *pdev)
++{
++ struct coretemp_data *data = platform_get_drvdata(pdev);
++
++ hwmon_device_unregister(data->class_dev);
++ sysfs_remove_group(&pdev->dev.kobj, &coretemp_group);
++ platform_set_drvdata(pdev, NULL);
++ kfree(data);
++ return 0;
++}
++
++static struct platform_driver coretemp_driver = {
++ .driver = {
++ .owner = THIS_MODULE,
++ .name = DRVNAME,
++ },
++ .probe = coretemp_probe,
++ .remove = __devexit_p(coretemp_remove),
++};
++
++struct pdev_entry {
++ struct list_head list;
++ struct platform_device *pdev;
++ unsigned int cpu;
++};
++
++static LIST_HEAD(pdev_list);
++static DEFINE_MUTEX(pdev_list_mutex);
++
++static int __cpuinit coretemp_devices_add(unsigned int cpu)
++{
++ int err;
++ struct platform_device *pdev;
++ struct pdev_entry *pdev_entry;
++
++ pdev = platform_device_alloc(DRVNAME, cpu);
++ if (!pdev) {
++ err = -ENOMEM;
++ printk(KERN_ERR DRVNAME ": Device allocation failed\n");
++ goto exit;
++
++ }
++
++ pdev_entry = kzalloc(sizeof(struct pdev_entry), GFP_KERNEL);
++
++ if (!pdev_entry) {
++ err = -ENOMEM;
++ goto exit_device_put;
++ }
++
++ err = platform_device_add(pdev);
++
++ if (err) {
++ printk(KERN_ERR DRVNAME ": Device addition failed (%d)\n",
++ err);
++ goto exit_device_free;
++ }
++
++ pdev_entry->pdev = pdev;
++ pdev_entry->cpu = cpu;
++ mutex_lock(&pdev_list_mutex);
++ list_add_tail(&pdev_entry->list, &pdev_list);
++ mutex_unlock(&pdev_list_mutex);
++
++ return 0;
++
++exit_device_free:
++ kfree(pdev_entry);
++exit_device_put:
++ platform_device_put(pdev);
++exit:
++ return err;
++}
++
++#ifdef CONFIG_HOTPLUG_CPU
++void coretemp_devices_remove(unsigned int cpu)
++{
++ struct pdev_entry *p, *n;
++ mutex_lock(&pdev_list_mutex);
++ list_for_each_entry_safe(p, n, &pdev_list, list) {
++ if (p->cpu == cpu) {
++ platform_device_unregister(p->pdev);
++ list_del(&p->list);
++ kfree(p);
++ }
++ }
++ mutex_unlock(&pdev_list_mutex);
++}
++
++static int coretemp_cpu_callback(struct notifier_block *nfb,
++ unsigned long action, void *hcpu)
++{
++ unsigned int cpu = (unsigned long) hcpu;
++
++ switch (action) {
++ case CPU_ONLINE:
++ coretemp_devices_add(cpu);
++ break;
++ case CPU_DEAD:
++ coretemp_devices_remove(cpu);
++ break;
++ }
++ return NOTIFY_OK;
++}
++
++static struct notifier_block __cpuinitdata coretemp_cpu_notifier = {
++ .notifier_call = coretemp_cpu_callback,
++};
++#endif /* !CONFIG_HOTPLUG_CPU */
++
++static int __init coretemp_init(void)
++{
++ int i, err = -ENODEV;
++ struct pdev_entry *p, *n;
++
++ /* quick check if we run Intel */
++ if (cpu_data[0].x86_vendor != X86_VENDOR_INTEL)
++ goto exit;
++
++ err = platform_driver_register(&coretemp_driver);
++ if (err)
++ goto exit;
++
++ for_each_online_cpu(i) {
++ struct cpuinfo_x86 *c = &(cpu_data)[i];
++
++ /* check if family 6, models e, f */
++ if ((c->cpuid_level < 0) || (c->x86 != 0x6) ||
++ !((c->x86_model == 0xe) || (c->x86_model == 0xf))) {
++
++ /* supported CPU not found, but report the unknown
++ family 6 CPU */
++ if ((c->x86 == 0x6) && (c->x86_model > 0xf))
++ printk(KERN_WARNING DRVNAME ": Unknown CPU, please"
++ " report to the lm-sensors@lm-sensors.org\n");
++ continue;
++ }
++
++ err = coretemp_devices_add(i);
++ if (err)
++ goto exit_driver;
++ }
++ if (list_empty(&pdev_list)) {
++ err = -ENODEV;
++ goto exit_driver_unreg;
++ }
++
++#ifdef CONFIG_HOTPLUG_CPU
++ register_hotcpu_notifier(&coretemp_cpu_notifier);
++#endif
++ return 0;
++
++exit_driver:
++ mutex_lock(&pdev_list_mutex);
++ list_for_each_entry_safe(p, n, &pdev_list, list) {
++ platform_device_unregister(p->pdev);
++ list_del(&p->list);
++ kfree(p);
++ }
++ mutex_unlock(&pdev_list_mutex);
++exit_driver_unreg:
++ platform_driver_unregister(&coretemp_driver);
++exit:
++ return err;
++}
++
++static void __exit coretemp_exit(void)
++{
++ struct pdev_entry *p, *n;
++#ifdef CONFIG_HOTPLUG_CPU
++ unregister_hotcpu_notifier(&coretemp_cpu_notifier);
++#endif
++ mutex_lock(&pdev_list_mutex);
++ list_for_each_entry_safe(p, n, &pdev_list, list) {
++ platform_device_unregister(p->pdev);
++ list_del(&p->list);
++ kfree(p);
++ }
++ mutex_unlock(&pdev_list_mutex);
++ platform_driver_unregister(&coretemp_driver);
++}
++
++MODULE_AUTHOR("Rudolf Marek <r.marek@assembler.cz>");
++MODULE_DESCRIPTION("Intel Core temperature monitor");
++MODULE_LICENSE("GPL");
++
++module_init(coretemp_init)
++module_exit(coretemp_exit)
+Index: linux-2.6.20-rc4/drivers/hwmon/Makefile
+===================================================================
+--- linux-2.6.20-rc4.orig/drivers/hwmon/Makefile 2007-01-07 06:45:51.000000000 +0100
++++ linux-2.6.20-rc4/drivers/hwmon/Makefile 2007-01-14 21:29:41.899868496 +0100
+@@ -21,6 +21,7 @@
+ obj-$(CONFIG_SENSORS_ADM9240) += adm9240.o
+ obj-$(CONFIG_SENSORS_AMS) += ams/
+ obj-$(CONFIG_SENSORS_ATXP1) += atxp1.o
++obj-$(CONFIG_SENSORS_CORETEMP) += coretemp.o
+ obj-$(CONFIG_SENSORS_DS1621) += ds1621.o
+ obj-$(CONFIG_SENSORS_F71805F) += f71805f.o
+ obj-$(CONFIG_SENSORS_FSCHER) += fscher.o
+Index: linux-2.6.20-rc4/drivers/hwmon/Kconfig
+===================================================================
+--- linux-2.6.20-rc4.orig/drivers/hwmon/Kconfig 2007-01-07 06:45:51.000000000 +0100
++++ linux-2.6.20-rc4/drivers/hwmon/Kconfig 2007-01-14 21:40:33.336991782 +0100
+@@ -156,6 +156,14 @@
+ This driver can also be built as a module. If so, the module
+ will be called atxp1.
+
++config SENSORS_CORETEMP
++ tristate "Intel Core (2) Duo/Solo temperature sensor"
++ depends on HWMON && X86 && EXPERIMENTAL
++ help
++ If you say yes here you get support for the temperature
++ sensor inside your CPU. Supported all are all known variants
++ of Intel Core family.
++
+ config SENSORS_DS1621
+ tristate "Dallas Semiconductor DS1621 and DS1625"
+ depends on HWMON && I2C
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ linux-2.6.20-rc4/Documentation/hwmon/coretemp 2007-01-14 22:01:58.766244221 +0100
+@@ -0,0 +1,37 @@
++Kernel driver coretemp
++======================
++
++Supported chips:
++ * All Intel Core family
++ Prefix: 'coretemp'
++ Addresses scanned: CPUID (family 0x6, models 0xe, 0xf)
++ Datasheet: Intel 64 and IA-32 Architectures Software Developer's Manual
++ Volume 3A: System Programming Guide
++
++Author: Rudolf Marek
++Contact: Rudolf Marek <r.marek@assembler.cz>
++
++Description
++-----------
++
++This driver permits reading temperature sensor embedded inside Intel Core CPU.
++Temperature is measured in degrees Celsius and measurement resolution is
++1 degree C. Valid temperatures are from 0 to TjMax degrees C, because
++the actual temperature is in fact a delta from TjMax.
++
++Temperature known as TjMax is the maximum junction temperature of processor.
++Intel defines this temperature as 85C or 100C. At this temperature, protection
++mechanism will perform actions to forcibly cool down the processor. Alarm
++may be raised, if the temperature grows enough (more than TjMax) to trigger
++the Out-Of-Spec bit. Following table summarizes the exported sysfs files:
++
++temp1_input - Core temperature (in milidegrees of Celsius).
++temp1_crit - Maximum junction temperature (in milidegrees of Celsius).
++temp1_crit_alarm - Set when Out-of-spec bit is set, never clears.
++ Correct CPU operation is no longer guaranteed.
++temp1_label - Contains string with the "Core X", where X is processor
++ number.
++
++The TjMax temperature is set to 85C if undocumented model specific register
++(UMSR) 0xee has bit 30 set. If not the TjMax is 100C as documented in processor
++datasheet. Intel will not disclose this information to individuals.
+
projects / people / teissler / ipfire-2.x.git / commitdiff
