#include <linux/rfkill.h>
#include <linux/pci.h>
#include <linux/pci_hotplug.h>
+#include <linux/dmi.h>
#define EEEPC_LAPTOP_VERSION "0.1"
acpi_handle handle; /* the handle of the hotk device */
u32 cm_supported; /* the control methods supported
by this BIOS */
+ bool cpufv_disabled;
uint init_flag; /* Init flags */
u16 event_count[128]; /* count for each event */
struct input_dev *inputdev;
struct eeepc_cpufv c;
int rv, value;
+ if (ehotk->cpufv_disabled)
+ return -EPERM;
if (get_cpufv(&c))
return -ENODEV;
rv = parse_arg(buf, count, &value);
return rv;
}
+static ssize_t show_cpufv_disabled(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ return sprintf(buf, "%d\n", ehotk->cpufv_disabled);
+}
+
+static ssize_t store_cpufv_disabled(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ int rv, value;
+
+ rv = parse_arg(buf, count, &value);
+ if (rv < 0)
+ return rv;
+
+ switch (value) {
+ case 0:
+ if (ehotk->cpufv_disabled)
+ pr_warning("cpufv enabled (not officially supported "
+ "on this model)\n");
+ ehotk->cpufv_disabled = false;
+ return rv;
+ case 1:
+ return -EPERM;
+ default:
+ return -EINVAL;
+ }
+}
+
+
static struct device_attribute dev_attr_cpufv = {
.attr = {
.name = "cpufv",
.show = show_available_cpufv
};
+static struct device_attribute dev_attr_cpufv_disabled = {
+ .attr = {
+ .name = "cpufv_disabled",
+ .mode = 0644 },
+ .show = show_cpufv_disabled,
+ .store = store_cpufv_disabled
+};
+
+
static struct attribute *platform_attributes[] = {
&dev_attr_camera.attr,
&dev_attr_cardr.attr,
&dev_attr_disp.attr,
&dev_attr_cpufv.attr,
&dev_attr_available_cpufv.attr,
+ &dev_attr_cpufv_disabled.attr,
NULL
};
return -EINVAL;
}
+static void eeepc_dmi_check(void)
+{
+ const char *model;
+
+ /*
+ * Blacklist for setting cpufv (cpu speed).
+ *
+ * EeePC 4G ("701") implements CFVS, but it is not supported
+ * by the pre-installed OS, and the original option to change it
+ * in the BIOS setup screen was removed in later versions.
+ *
+ * Judging by the lack of "Super Hybrid Engine" on Asus product pages,
+ * this applies to all "701" models (4G/4G Surf/2G Surf).
+ *
+ * So Asus made a deliberate decision not to support it on this model.
+ * We have several reports that using it can cause the system to hang
+ *
+ * The hang has also been reported on a "702" (Model name "8G"?).
+ *
+ * We avoid dmi_check_system() / dmi_match(), because they use
+ * substring matching. We don't want to affect the "701SD"
+ * and "701SDX" models, because they do support S.H.E.
+ */
+
+ model = dmi_get_system_info(DMI_PRODUCT_NAME);
+ if (!model)
+ return;
+
+ if (strcmp(model, "701") == 0 || strcmp(model, "702") == 0) {
+ ehotk->cpufv_disabled = true;
+ pr_info("model %s does not officially support setting cpu "
+ "speed\n", model);
+ pr_info("cpufv disabled to avoid instability\n");
+ }
+}
+
static void cmsg_quirk(int cm, const char *name)
{
int dummy;
device->driver_data = ehotk;
ehotk->device = device;
+ eeepc_dmi_check();
+
result = eeepc_hotk_check();
if (result)
goto fail_platform_driver;