ACPI / Fan: add ACPI 4.0 style fan support
This patch adds support for ACPI 4.0 style fan, lacking part is: no support for 'Low Speed Notification Support', 'Fine Grain Control' is not used yet. It's not clear what to do on suspend/resume callback for 4.0 style ACPI fan, so it does nothing for now. Signed-off-by: Aaron Lu <aaron.lu@intel.com> Signed-off-by: Zhang Rui <rui.zhang@intel.com>
This commit is contained in:
Aaron Lu
Zhang Rui
Родитель
19593a1fb1
Коммит
9519a6356c
|
|
@ -31,6 +31,7 @@
|
|||
#include <linux/thermal.h>
|
||||
#include <linux/acpi.h>
|
||||
#include <linux/platform_device.h>
|
||||
#include <linux/sort.h>
|
||||
|
||||
MODULE_AUTHOR("Paul Diefenbaugh");
|
||||
MODULE_DESCRIPTION("ACPI Fan Driver");
|
||||
|
|
@ -59,6 +60,29 @@ static struct dev_pm_ops acpi_fan_pm = {
|
|||
#define FAN_PM_OPS_PTR NULL
|
||||
#endif
|
||||
|
||||
struct acpi_fan_fps {
|
||||
u64 control;
|
||||
u64 trip_point;
|
||||
u64 speed;
|
||||
u64 noise_level;
|
||||
u64 power;
|
||||
};
|
||||
|
||||
struct acpi_fan_fif {
|
||||
u64 revision;
|
||||
u64 fine_grain_ctrl;
|
||||
u64 step_size;
|
||||
u64 low_speed_notification;
|
||||
};
|
||||
|
||||
struct acpi_fan {
|
||||
bool acpi4;
|
||||
struct acpi_fan_fif fif;
|
||||
struct acpi_fan_fps *fps;
|
||||
int fps_count;
|
||||
struct thermal_cooling_device *cdev;
|
||||
};
|
||||
|
||||
static struct platform_driver acpi_fan_driver = {
|
||||
.probe = acpi_fan_probe,
|
||||
.remove = acpi_fan_remove,
|
||||
|
|
@ -73,21 +97,62 @@ static struct platform_driver acpi_fan_driver = {
|
|||
static int fan_get_max_state(struct thermal_cooling_device *cdev, unsigned long
|
||||
*state)
|
||||
{
|
||||
/* ACPI fan device only support two states: ON/OFF */
|
||||
*state = 1;
|
||||
struct acpi_device *device = cdev->devdata;
|
||||
struct acpi_fan *fan = acpi_driver_data(device);
|
||||
|
||||
if (fan->acpi4)
|
||||
*state = fan->fps_count - 1;
|
||||
else
|
||||
*state = 1;
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int fan_get_cur_state(struct thermal_cooling_device *cdev, unsigned long
|
||||
*state)
|
||||
static int fan_get_state_acpi4(struct acpi_device *device, unsigned long *state)
|
||||
{
|
||||
struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
|
||||
struct acpi_fan *fan = acpi_driver_data(device);
|
||||
union acpi_object *obj;
|
||||
acpi_status status;
|
||||
int control, i;
|
||||
|
||||
status = acpi_evaluate_object(device->handle, "_FST", NULL, &buffer);
|
||||
if (ACPI_FAILURE(status)) {
|
||||
dev_err(&device->dev, "Get fan state failed\n");
|
||||
return status;
|
||||
}
|
||||
|
||||
obj = buffer.pointer;
|
||||
if (!obj || obj->type != ACPI_TYPE_PACKAGE ||
|
||||
obj->package.count != 3 ||
|
||||
obj->package.elements[1].type != ACPI_TYPE_INTEGER) {
|
||||
dev_err(&device->dev, "Invalid _FST data\n");
|
||||
status = -EINVAL;
|
||||
goto err;
|
||||
}
|
||||
|
||||
control = obj->package.elements[1].integer.value;
|
||||
for (i = 0; i < fan->fps_count; i++) {
|
||||
if (control == fan->fps[i].control)
|
||||
break;
|
||||
}
|
||||
if (i == fan->fps_count) {
|
||||
dev_dbg(&device->dev, "Invalid control value returned\n");
|
||||
status = -EINVAL;
|
||||
goto err;
|
||||
}
|
||||
|
||||
*state = i;
|
||||
|
||||
err:
|
||||
kfree(obj);
|
||||
return status;
|
||||
}
|
||||
|
||||
static int fan_get_state(struct acpi_device *device, unsigned long *state)
|
||||
{
|
||||
struct acpi_device *device = cdev->devdata;
|
||||
int result;
|
||||
int acpi_state = ACPI_STATE_D0;
|
||||
|
||||
if (!device)
|
||||
return -EINVAL;
|
||||
|
||||
result = acpi_device_update_power(device, &acpi_state);
|
||||
if (result)
|
||||
return result;
|
||||
|
|
@ -97,20 +162,56 @@ static int fan_get_cur_state(struct thermal_cooling_device *cdev, unsigned long
|
|||
return 0;
|
||||
}
|
||||
|
||||
static int fan_get_cur_state(struct thermal_cooling_device *cdev, unsigned long
|
||||
*state)
|
||||
{
|
||||
struct acpi_device *device = cdev->devdata;
|
||||
struct acpi_fan *fan = acpi_driver_data(device);
|
||||
|
||||
if (fan->acpi4)
|
||||
return fan_get_state_acpi4(device, state);
|
||||
else
|
||||
return fan_get_state(device, state);
|
||||
}
|
||||
|
||||
static int fan_set_state(struct acpi_device *device, unsigned long state)
|
||||
{
|
||||
if (state != 0 && state != 1)
|
||||
return -EINVAL;
|
||||
|
||||
return acpi_device_set_power(device,
|
||||
state ? ACPI_STATE_D0 : ACPI_STATE_D3_COLD);
|
||||
}
|
||||
|
||||
static int fan_set_state_acpi4(struct acpi_device *device, unsigned long state)
|
||||
{
|
||||
struct acpi_fan *fan = acpi_driver_data(device);
|
||||
acpi_status status;
|
||||
|
||||
if (state >= fan->fps_count)
|
||||
return -EINVAL;
|
||||
|
||||
status = acpi_execute_simple_method(device->handle, "_FSL",
|
||||
fan->fps[state].control);
|
||||
if (ACPI_FAILURE(status)) {
|
||||
dev_dbg(&device->dev, "Failed to set state by _FSL\n");
|
||||
return status;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int
|
||||
fan_set_cur_state(struct thermal_cooling_device *cdev, unsigned long state)
|
||||
{
|
||||
struct acpi_device *device = cdev->devdata;
|
||||
int result;
|
||||
struct acpi_fan *fan = acpi_driver_data(device);
|
||||
|
||||
if (!device || (state != 0 && state != 1))
|
||||
return -EINVAL;
|
||||
|
||||
result = acpi_device_set_power(device,
|
||||
state ? ACPI_STATE_D0 : ACPI_STATE_D3_COLD);
|
||||
|
||||
return result;
|
||||
}
|
||||
if (fan->acpi4)
|
||||
return fan_set_state_acpi4(device, state);
|
||||
else
|
||||
return fan_set_state(device, state);
|
||||
}
|
||||
|
||||
static const struct thermal_cooling_device_ops fan_cooling_ops = {
|
||||
.get_max_state = fan_get_max_state,
|
||||
|
|
@ -122,16 +223,125 @@ static const struct thermal_cooling_device_ops fan_cooling_ops = {
|
|||
Driver Interface
|
||||
-------------------------------------------------------------------------- */
|
||||
|
||||
static bool acpi_fan_is_acpi4(struct acpi_device *device)
|
||||
{
|
||||
return acpi_has_method(device->handle, "_FIF") &&
|
||||
acpi_has_method(device->handle, "_FPS") &&
|
||||
acpi_has_method(device->handle, "_FSL") &&
|
||||
acpi_has_method(device->handle, "_FST");
|
||||
}
|
||||
|
||||
static int acpi_fan_get_fif(struct acpi_device *device)
|
||||
{
|
||||
struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
|
||||
struct acpi_fan *fan = acpi_driver_data(device);
|
||||
struct acpi_buffer format = { sizeof("NNNN"), "NNNN" };
|
||||
struct acpi_buffer fif = { sizeof(fan->fif), &fan->fif };
|
||||
union acpi_object *obj;
|
||||
acpi_status status;
|
||||
|
||||
status = acpi_evaluate_object(device->handle, "_FIF", NULL, &buffer);
|
||||
if (ACPI_FAILURE(status))
|
||||
return status;
|
||||
|
||||
obj = buffer.pointer;
|
||||
if (!obj || obj->type != ACPI_TYPE_PACKAGE) {
|
||||
dev_err(&device->dev, "Invalid _FIF data\n");
|
||||
status = -EINVAL;
|
||||
goto err;
|
||||
}
|
||||
|
||||
status = acpi_extract_package(obj, &format, &fif);
|
||||
if (ACPI_FAILURE(status)) {
|
||||
dev_err(&device->dev, "Invalid _FIF element\n");
|
||||
status = -EINVAL;
|
||||
}
|
||||
|
||||
err:
|
||||
kfree(obj);
|
||||
return status;
|
||||
}
|
||||
|
||||
static int acpi_fan_speed_cmp(const void *a, const void *b)
|
||||
{
|
||||
const struct acpi_fan_fps *fps1 = a;
|
||||
const struct acpi_fan_fps *fps2 = b;
|
||||
return fps1->speed - fps2->speed;
|
||||
}
|
||||
|
||||
static int acpi_fan_get_fps(struct acpi_device *device)
|
||||
{
|
||||
struct acpi_fan *fan = acpi_driver_data(device);
|
||||
struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
|
||||
union acpi_object *obj;
|
||||
acpi_status status;
|
||||
int i;
|
||||
|
||||
status = acpi_evaluate_object(device->handle, "_FPS", NULL, &buffer);
|
||||
if (ACPI_FAILURE(status))
|
||||
return status;
|
||||
|
||||
obj = buffer.pointer;
|
||||
if (!obj || obj->type != ACPI_TYPE_PACKAGE || obj->package.count < 2) {
|
||||
dev_err(&device->dev, "Invalid _FPS data\n");
|
||||
status = -EINVAL;
|
||||
goto err;
|
||||
}
|
||||
|
||||
fan->fps_count = obj->package.count - 1; /* minus revision field */
|
||||
fan->fps = devm_kzalloc(&device->dev,
|
||||
fan->fps_count * sizeof(struct acpi_fan_fps),
|
||||
GFP_KERNEL);
|
||||
if (!fan->fps) {
|
||||
dev_err(&device->dev, "Not enough memory\n");
|
||||
status = -ENOMEM;
|
||||
goto err;
|
||||
}
|
||||
for (i = 0; i < fan->fps_count; i++) {
|
||||
struct acpi_buffer format = { sizeof("NNNNN"), "NNNNN" };
|
||||
struct acpi_buffer fps = { sizeof(fan->fps[i]), &fan->fps[i] };
|
||||
status = acpi_extract_package(&obj->package.elements[i + 1],
|
||||
&format, &fps);
|
||||
if (ACPI_FAILURE(status)) {
|
||||
dev_err(&device->dev, "Invalid _FPS element\n");
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
/* sort the state array according to fan speed in increase order */
|
||||
sort(fan->fps, fan->fps_count, sizeof(*fan->fps),
|
||||
acpi_fan_speed_cmp, NULL);
|
||||
|
||||
err:
|
||||
kfree(obj);
|
||||
return status;
|
||||
}
|
||||
|
||||
static int acpi_fan_probe(struct platform_device *pdev)
|
||||
{
|
||||
int result = 0;
|
||||
struct thermal_cooling_device *cdev;
|
||||
struct acpi_fan *fan;
|
||||
struct acpi_device *device = ACPI_COMPANION(&pdev->dev);
|
||||
|
||||
result = acpi_device_update_power(device, NULL);
|
||||
if (result) {
|
||||
dev_err(&pdev->dev, "Setting initial power state\n");
|
||||
goto end;
|
||||
fan = devm_kzalloc(&pdev->dev, sizeof(*fan), GFP_KERNEL);
|
||||
if (!fan) {
|
||||
dev_err(&device->dev, "No memory for fan\n");
|
||||
return -ENOMEM;
|
||||
}
|
||||
device->driver_data = fan;
|
||||
platform_set_drvdata(pdev, fan);
|
||||
|
||||
if (acpi_fan_is_acpi4(device)) {
|
||||
if (acpi_fan_get_fif(device) || acpi_fan_get_fps(device))
|
||||
goto end;
|
||||
fan->acpi4 = true;
|
||||
} else {
|
||||
result = acpi_device_update_power(device, NULL);
|
||||
if (result) {
|
||||
dev_err(&device->dev, "Setting initial power state\n");
|
||||
goto end;
|
||||
}
|
||||
}
|
||||
|
||||
cdev = thermal_cooling_device_register("Fan", device,
|
||||
|
|
@ -143,7 +353,7 @@ static int acpi_fan_probe(struct platform_device *pdev)
|
|||
|
||||
dev_dbg(&pdev->dev, "registered as cooling_device%d\n", cdev->id);
|
||||
|
||||
platform_set_drvdata(pdev, cdev);
|
||||
fan->cdev = cdev;
|
||||
result = sysfs_create_link(&pdev->dev.kobj,
|
||||
&cdev->device.kobj,
|
||||
"thermal_cooling");
|
||||
|
|
@ -158,21 +368,17 @@ static int acpi_fan_probe(struct platform_device *pdev)
|
|||
dev_err(&pdev->dev, "Failed to create sysfs link "
|
||||
"'device'\n");
|
||||
|
||||
dev_info(&pdev->dev, "%s [%s] (%s)\n",
|
||||
acpi_device_name(device), acpi_device_bid(device),
|
||||
!device->power.state ? "on" : "off");
|
||||
|
||||
end:
|
||||
return result;
|
||||
}
|
||||
|
||||
static int acpi_fan_remove(struct platform_device *pdev)
|
||||
{
|
||||
struct thermal_cooling_device *cdev = platform_get_drvdata(pdev);
|
||||
struct acpi_fan *fan = platform_get_drvdata(pdev);
|
||||
|
||||
sysfs_remove_link(&pdev->dev.kobj, "thermal_cooling");
|
||||
sysfs_remove_link(&cdev->device.kobj, "device");
|
||||
thermal_cooling_device_unregister(cdev);
|
||||
sysfs_remove_link(&fan->cdev->device.kobj, "device");
|
||||
thermal_cooling_device_unregister(fan->cdev);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
|
@ -180,6 +386,10 @@ static int acpi_fan_remove(struct platform_device *pdev)
|
|||
#ifdef CONFIG_PM_SLEEP
|
||||
static int acpi_fan_suspend(struct device *dev)
|
||||
{
|
||||
struct acpi_fan *fan = dev_get_drvdata(dev);
|
||||
if (fan->acpi4)
|
||||
return 0;
|
||||
|
||||
acpi_device_set_power(ACPI_COMPANION(dev), ACPI_STATE_D0);
|
||||
|
||||
return AE_OK;
|
||||
|
|
@ -188,6 +398,10 @@ static int acpi_fan_suspend(struct device *dev)
|
|||
static int acpi_fan_resume(struct device *dev)
|
||||
{
|
||||
int result;
|
||||
struct acpi_fan *fan = dev_get_drvdata(dev);
|
||||
|
||||
if (fan->acpi4)
|
||||
return 0;
|
||||
|
||||
result = acpi_device_update_power(ACPI_COMPANION(dev), NULL);
|
||||
if (result)
|
||||
|
|
|
|||
Загрузка…
Ссылка в новой задаче