sudo apt-get install linux-source
sudo su
cd /usr/local/src
cat<<EOF>linux-ideapad-lenovo-g40-30.patch
--- orig/ideapad-laptop.c 2015-05-01 01:32:41.760340514 +0200
+++ mine/ideapad-laptop.c 2015-05-01 01:32:44.116343594 +0200
@@ -26,8 +26,7 @@
#include <linux/module.h>
#include <linux/init.h>
#include <linux/types.h>
-#include <acpi/acpi_bus.h>
-#include <acpi/acpi_drivers.h>
+#include <linux/acpi.h>
#include <linux/rfkill.h>
#include <linux/platform_device.h>
#include <linux/input.h>
@@ -37,6 +36,8 @@
#include <linux/debugfs.h>
#include <linux/seq_file.h>
#include <linux/i8042.h>
+#include <linux/dmi.h>
+#include <linux/device.h>
#define IDEAPAD_RFKILL_DEV_NUM (3)
@@ -86,6 +87,7 @@
struct backlight_device *blightdev;
struct dentry *debug;
unsigned long cfg;
+ bool has_hw_rfkill_switch;
};
static bool no_bt_rfkill;
@@ -472,12 +474,14 @@
static void ideapad_sync_rfk_state(struct ideapad_private *priv)
{
- unsigned long hw_blocked;
+ unsigned long hw_blocked = 0;
int i;
- if (read_ec_data(priv->adev->handle, VPCCMD_R_RF, &hw_blocked))
- return;
- hw_blocked = !hw_blocked;
+ if (priv->has_hw_rfkill_switch) {
+ if (read_ec_data(priv->adev->handle, VPCCMD_R_RF, &hw_blocked))
+ return;
+ hw_blocked = !hw_blocked;
+ }
for (i = 0; i < IDEAPAD_RFKILL_DEV_NUM; i++)
if (priv->rfk[i])
@@ -820,6 +824,29 @@
}
}
+/*
+ * Some ideapads don't have a hardware rfkill switch, reading VPCCMD_R_RF
+ * always results in 0 on these models, causing ideapad_laptop to wrongly
+ * report all radios as hardware-blocked.
+ */
+static struct dmi_system_id no_hw_rfkill_list[] = {
+ {
+ .ident = "Lenovo Yoga 2 11 / 13 / Pro",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
+ DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo Yoga 2"),
+ },
+ },
+ {
+ .ident = "Lenovo G40-30",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
+ DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo G40-30"),
+ },
+ },
+ {}
+};
static int ideapad_acpi_add(struct platform_device *pdev)
{
int ret, i;
@@ -834,7 +861,7 @@
if (read_method_int(adev->handle, "_CFG", &cfg))
return -ENODEV;
- priv = kzalloc(sizeof(*priv), GFP_KERNEL);
+ priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
if (!priv)
return -ENOMEM;
@@ -842,10 +869,11 @@
priv->cfg = cfg;
priv->adev = adev;
priv->platform_device = pdev;
+ priv->has_hw_rfkill_switch = !dmi_check_system(no_hw_rfkill_list);
ret = ideapad_sysfs_init(priv);
if (ret)
- goto sysfs_failed;
+ return ret;
ret = ideapad_debugfs_init(priv);
if (ret)
@@ -855,12 +883,17 @@
if (ret)
goto input_failed;
- for (i = 0; i < IDEAPAD_RFKILL_DEV_NUM; i++) {
+ /*
+ * On some models without a hw-switch (the yoga 2 13 at least)
+ * VPCCMD_W_RF must be explicitly set to 1 for the wifi to work.
+ */
+ if (!priv->has_hw_rfkill_switch)
+ write_ec_cmd(priv->adev->handle, VPCCMD_W_RF, 1);
+
+ for (i = 0; i < IDEAPAD_RFKILL_DEV_NUM; i++)
if (test_bit(ideapad_rfk_data[i].cfgbit, &priv->cfg))
ideapad_register_rfkill(priv, i);
- else
- priv->rfk[i] = NULL;
- }
+
ideapad_sync_rfk_state(priv);
ideapad_sync_touchpad_state(priv);
@@ -885,8 +918,6 @@
ideapad_debugfs_exit(priv);
debugfs_failed:
ideapad_sysfs_exit(priv);
-sysfs_failed:
- kfree(priv);
return ret;
}
@@ -904,7 +935,6 @@
ideapad_debugfs_exit(priv);
ideapad_sysfs_exit(priv);
dev_set_drvdata(&pdev->dev, NULL);
- kfree(priv);
return 0;
}
###
cat /usr/local/src/linux-ideapad-lenovo-g40-30-3.19.0.patch
--- ./drivers/platform/x86/ideapad-laptop.c.orig 2015-05-01 21:54:22.304179266 +0200
+++ ./drivers/platform/x86/ideapad-laptop.c 2015-05-01 21:55:24.820686950 +0200
@@ -843,6 +843,13 @@
DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo YOGA 3 Pro-1370"),
},
},
+ {
+ .ident = "Lenovo G40-30",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
+ DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo G40-30"),
+ },
+ },
{}
};
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