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path: root/drivers/hwmon/k8temp.c
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Diffstat (limited to 'drivers/hwmon/k8temp.c')
-rw-r--r--drivers/hwmon/k8temp.c141
1 files changed, 72 insertions, 69 deletions
diff --git a/drivers/hwmon/k8temp.c b/drivers/hwmon/k8temp.c
index 1fe99511184..734d55d48cc 100644
--- a/drivers/hwmon/k8temp.c
+++ b/drivers/hwmon/k8temp.c
@@ -22,7 +22,6 @@
*/
#include <linux/module.h>
-#include <linux/delay.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/jiffies.h>
@@ -46,7 +45,7 @@ struct k8temp_data {
unsigned long last_updated; /* in jiffies */
/* registers values */
- u8 sensorsp; /* sensor presence bits - SEL_CORE & SEL_PLACE */
+ u8 sensorsp; /* sensor presence bits - SEL_CORE, SEL_PLACE */
u32 temp[2][2]; /* core, place */
u8 swap_core_select; /* meaning of SEL_CORE is inverted */
u32 temp_offset;
@@ -63,7 +62,7 @@ static struct k8temp_data *k8temp_update_device(struct device *dev)
if (!data->valid
|| time_after(jiffies, data->last_updated + HZ)) {
pci_read_config_byte(pdev, REG_TEMP, &tmp);
- tmp &= ~(SEL_PLACE | SEL_CORE); /* Select sensor 0, core0 */
+ tmp &= ~(SEL_PLACE | SEL_CORE); /* Select sensor 0, core0 */
pci_write_config_byte(pdev, REG_TEMP, tmp);
pci_read_config_dword(pdev, REG_TEMP, &data->temp[0][0]);
@@ -82,7 +81,7 @@ static struct k8temp_data *k8temp_update_device(struct device *dev)
&data->temp[1][0]);
if (data->sensorsp & SEL_PLACE) {
- tmp |= SEL_PLACE; /* Select sensor 1, core1 */
+ tmp |= SEL_PLACE; /* Select sensor 1, core1 */
pci_write_config_byte(pdev, REG_TEMP, tmp);
pci_read_config_dword(pdev, REG_TEMP,
&data->temp[1][1]);
@@ -120,7 +119,7 @@ static ssize_t show_temp(struct device *dev,
int temp;
struct k8temp_data *data = k8temp_update_device(dev);
- if (data->swap_core_select)
+ if (data->swap_core_select && (data->sensorsp & SEL_CORE))
core = core ? 0 : 1;
temp = TEMP_FROM_REG(data->temp[core][place]) + data->temp_offset;
@@ -136,14 +135,45 @@ static SENSOR_DEVICE_ATTR_2(temp3_input, S_IRUGO, show_temp, NULL, 1, 0);
static SENSOR_DEVICE_ATTR_2(temp4_input, S_IRUGO, show_temp, NULL, 1, 1);
static DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
-static struct pci_device_id k8temp_ids[] = {
+static const struct pci_device_id k8temp_ids[] = {
{ PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_K8_NB_MISC) },
{ 0 },
};
MODULE_DEVICE_TABLE(pci, k8temp_ids);
-static int __devinit k8temp_probe(struct pci_dev *pdev,
+static int is_rev_g_desktop(u8 model)
+{
+ u32 brandidx;
+
+ if (model < 0x69)
+ return 0;
+
+ if (model == 0xc1 || model == 0x6c || model == 0x7c)
+ return 0;
+
+ /*
+ * Differentiate between AM2 and ASB1.
+ * See "Constructing the processor Name String" in "Revision
+ * Guide for AMD NPT Family 0Fh Processors" (33610).
+ */
+ brandidx = cpuid_ebx(0x80000001);
+ brandidx = (brandidx >> 9) & 0x1f;
+
+ /* Single core */
+ if ((model == 0x6f || model == 0x7f) &&
+ (brandidx == 0x7 || brandidx == 0x9 || brandidx == 0xc))
+ return 0;
+
+ /* Dual core */
+ if (model == 0x6b &&
+ (brandidx == 0xb || brandidx == 0xc))
+ return 0;
+
+ return 1;
+}
+
+static int k8temp_probe(struct pci_dev *pdev,
const struct pci_device_id *id)
{
int err;
@@ -152,55 +182,44 @@ static int __devinit k8temp_probe(struct pci_dev *pdev,
u8 model, stepping;
struct k8temp_data *data;
- if (!(data = kzalloc(sizeof(struct k8temp_data), GFP_KERNEL))) {
- err = -ENOMEM;
- goto exit;
- }
+ data = devm_kzalloc(&pdev->dev, sizeof(struct k8temp_data), GFP_KERNEL);
+ if (!data)
+ return -ENOMEM;
model = boot_cpu_data.x86_model;
stepping = boot_cpu_data.x86_mask;
- switch (boot_cpu_data.x86) {
- case 0xf:
- /* feature available since SH-C0, exclude older revisions */
- if (((model == 4) && (stepping == 0)) ||
- ((model == 5) && (stepping <= 1))) {
- err = -ENODEV;
- goto exit_free;
- }
-
- /*
- * AMD NPT family 0fh, i.e. RevF and RevG:
- * meaning of SEL_CORE bit is inverted
- */
- if (model >= 0x40) {
- data->swap_core_select = 1;
- dev_warn(&pdev->dev, "Temperature readouts might be "
- "wrong - check erratum #141\n");
- }
-
- if ((model >= 0x69) &&
- !(model == 0xc1 || model == 0x6c || model == 0x7c)) {
- /*
- * RevG desktop CPUs (i.e. no socket S1G1 parts)
- * need additional offset, otherwise reported
- * temperature is below ambient temperature
- */
- data->temp_offset = 21000;
- }
-
- break;
+ /* feature available since SH-C0, exclude older revisions */
+ if ((model == 4 && stepping == 0) ||
+ (model == 5 && stepping <= 1))
+ return -ENODEV;
+
+ /*
+ * AMD NPT family 0fh, i.e. RevF and RevG:
+ * meaning of SEL_CORE bit is inverted
+ */
+ if (model >= 0x40) {
+ data->swap_core_select = 1;
+ dev_warn(&pdev->dev,
+ "Temperature readouts might be wrong - check erratum #141\n");
}
+ /*
+ * RevG desktop CPUs (i.e. no socket S1G1 or ASB1 parts) need
+ * additional offset, otherwise reported temperature is below
+ * ambient temperature
+ */
+ if (is_rev_g_desktop(model))
+ data->temp_offset = 21000;
+
pci_read_config_byte(pdev, REG_TEMP, &scfg);
- scfg &= ~(SEL_PLACE | SEL_CORE); /* Select sensor 0, core0 */
+ scfg &= ~(SEL_PLACE | SEL_CORE); /* Select sensor 0, core0 */
pci_write_config_byte(pdev, REG_TEMP, scfg);
pci_read_config_byte(pdev, REG_TEMP, &scfg);
if (scfg & (SEL_PLACE | SEL_CORE)) {
dev_err(&pdev->dev, "Configuration bit(s) stuck at 1!\n");
- err = -ENODEV;
- goto exit_free;
+ return -ENODEV;
}
scfg |= (SEL_PLACE | SEL_CORE);
@@ -214,7 +233,7 @@ static int __devinit k8temp_probe(struct pci_dev *pdev,
pci_write_config_byte(pdev, REG_TEMP, scfg);
pci_read_config_dword(pdev, REG_TEMP, &temp);
scfg |= SEL_CORE; /* prepare for next selection */
- if (!((temp >> 16) & 0xff)) /* if temp is 0 -49C is not likely */
+ if (!((temp >> 16) & 0xff)) /* if temp is 0 -49C is unlikely */
data->sensorsp &= ~SEL_PLACE;
}
@@ -222,13 +241,13 @@ static int __devinit k8temp_probe(struct pci_dev *pdev,
scfg &= ~SEL_PLACE; /* Select sensor 0, core1 */
pci_write_config_byte(pdev, REG_TEMP, scfg);
pci_read_config_dword(pdev, REG_TEMP, &temp);
- if (!((temp >> 16) & 0xff)) /* if temp is 0 -49C is not likely */
+ if (!((temp >> 16) & 0xff)) /* if temp is 0 -49C is unlikely */
data->sensorsp &= ~SEL_CORE;
}
data->name = "k8temp";
mutex_init(&data->update_lock);
- dev_set_drvdata(&pdev->dev, data);
+ pci_set_drvdata(pdev, data);
/* Register sysfs hooks */
err = device_create_file(&pdev->dev,
@@ -250,12 +269,13 @@ static int __devinit k8temp_probe(struct pci_dev *pdev,
&sensor_dev_attr_temp3_input.dev_attr);
if (err)
goto exit_remove;
- if (data->sensorsp & SEL_PLACE)
+ if (data->sensorsp & SEL_PLACE) {
err = device_create_file(&pdev->dev,
&sensor_dev_attr_temp4_input.
dev_attr);
if (err)
goto exit_remove;
+ }
}
err = device_create_file(&pdev->dev, &dev_attr_name);
@@ -281,16 +301,12 @@ exit_remove:
device_remove_file(&pdev->dev,
&sensor_dev_attr_temp4_input.dev_attr);
device_remove_file(&pdev->dev, &dev_attr_name);
-exit_free:
- dev_set_drvdata(&pdev->dev, NULL);
- kfree(data);
-exit:
return err;
}
-static void __devexit k8temp_remove(struct pci_dev *pdev)
+static void k8temp_remove(struct pci_dev *pdev)
{
- struct k8temp_data *data = dev_get_drvdata(&pdev->dev);
+ struct k8temp_data *data = pci_get_drvdata(pdev);
hwmon_device_unregister(data->hwmon_dev);
device_remove_file(&pdev->dev,
@@ -302,30 +318,17 @@ static void __devexit k8temp_remove(struct pci_dev *pdev)
device_remove_file(&pdev->dev,
&sensor_dev_attr_temp4_input.dev_attr);
device_remove_file(&pdev->dev, &dev_attr_name);
- dev_set_drvdata(&pdev->dev, NULL);
- kfree(data);
}
static struct pci_driver k8temp_driver = {
.name = "k8temp",
.id_table = k8temp_ids,
.probe = k8temp_probe,
- .remove = __devexit_p(k8temp_remove),
+ .remove = k8temp_remove,
};
-static int __init k8temp_init(void)
-{
- return pci_register_driver(&k8temp_driver);
-}
-
-static void __exit k8temp_exit(void)
-{
- pci_unregister_driver(&k8temp_driver);
-}
+module_pci_driver(k8temp_driver);
MODULE_AUTHOR("Rudolf Marek <r.marek@assembler.cz>");
MODULE_DESCRIPTION("AMD K8 core temperature monitor");
MODULE_LICENSE("GPL");
-
-module_init(k8temp_init)
-module_exit(k8temp_exit)
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-11-09 07:00:28 +0000