Handle 0x0105 allows to change (and store persistently) the touchpad
state, while notebooks with handle 0x0148 also provides the Fn-F1 combo
to change the touchpad state, but the key driven change is not handled
by this patch.
Signed-off-by: Marco Chiappero <marco@xxxxxxxxxx>
---
--- a/drivers/platform/x86/sony-laptop.c
+++ b/drivers/platform/x86/sony-laptop.c
@@ -2415,6 +2415,75 @@ static int sony_nc_highspeed_charging_cl
return 0;
}
+static struct device_attribute *tpad_handle;
+static int sony_tpad_handle = -1;
+
+static ssize_t sony_nc_touchpad_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buffer, size_t count)
+{
+ unsigned int result;
+ unsigned long value;
+
+ if (count > 31)
+ return -EINVAL;
+ if (strict_strtoul(buffer, 10, &value) || value > 1)
+ return -EINVAL;
+
+ /* sysfs: 0 disabled, 1 enabled; EC: 0 enabled, 1 disabled */
+ if (sony_call_snc_handle(sony_tpad_handle,
+ (!value << 0x10) | 0x100, &result))
+ return -EIO;
+
+ return count;
+}
+
+static ssize_t sony_nc_touchpad_show(struct device *dev,
+ struct device_attribute *attr, char *buffer)
+{
+ ssize_t count = 0;
+ unsigned int result;
+
+ if (sony_call_snc_handle(sony_tpad_handle, 0x000, &result))
+ return -EINVAL;
+
+ /* 1 tpad off, 0 tpad on */
+ count = snprintf(buffer, PAGE_SIZE, "%d\n", !(result & 0x01));
+ return count;
+}
+
+static int sony_nc_touchpad_setup(struct platform_device *pd)
+{
+ tpad_handle = kzalloc(sizeof(struct device_attribute), GFP_KERNEL);
+ if (!tpad_handle)
+ return -ENOMEM;
+
+ sysfs_attr_init(&tpad_handle->attr);
+ tpad_handle->attr.name = "touchpad";
+ tpad_handle->attr.mode = S_IRUGO | S_IWUSR;
+ tpad_handle->show = sony_nc_touchpad_show;
+ tpad_handle->store = sony_nc_touchpad_store;
+
+ if (device_create_file(&pd->dev, tpad_handle)) {
+ kfree(tpad_handle);
+ tpad_handle = NULL;
+ return -1;
+ }
+
+ return 0;
+}
+
+static int sony_nc_touchpad_cleanup(struct platform_device *pd)
+{
+ if (tpad_handle) {
+ device_remove_file(&pd->dev, tpad_handle);
+ kfree(tpad_handle);
+ tpad_handle = NULL;
+ }
+
+ return 0;
+}
+
static void sony_nc_backlight_ng_read_limits(int handle,
struct sony_backlight_props *props)
@@ -2551,6 +2620,11 @@ static void sony_nc_snc_setup_handles(st
case 0x0102:
ret = sony_nc_function_setup(handle);
break;
+ case 0x0105:
+ case 0x0148: /* same as 0x0105 + Fn-F1 combo */
+ sony_tpad_handle = handle;
+ ret = sony_nc_touchpad_setup(pd);
+ break;
case 0x0115:
case 0x0136:
case 0x013f:
@@ -2608,6 +2682,10 @@ static void sony_nc_snc_cleanup_handles(
dprintk("looking at handle 0x%.4x\n", handle);
switch (handle) {
+ case 0x0105:
+ case 0x0148:
+ sony_nc_touchpad_cleanup(pd);
+ break;
case 0x0115:
case 0x0136:
case 0x013f:
--
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