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sony-laptop: add touchpad enable/disable function

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This setting is stored in the EC and available across reboots.

[malattia@linux.it: group function specific variables in a struct, use
kstrtoul]

Signed-off-by: Marco Chiappero <marco@absence.it>
Signed-off-by: Mattia Dongili <malattia@linux.it>
Signed-off-by: Matthew Garrett <mjg@redhat.com>
This commit is contained in:
Marco Chiappero 2012-05-19 22:36:00 +09:00 committed by Matthew Garrett
parent 2e52631127
commit 2b8791c4ff
1 changed files with 91 additions and 0 deletions
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91
drivers/platform/x86/sony-laptop.c
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@ -159,6 +159,10 @@ static void sony_nc_lid_resume_cleanup(struct platform_device *pd);
static int sony_nc_highspeed_charging_setup(struct platform_device *pd);
static void sony_nc_highspeed_charging_cleanup(struct platform_device *pd);
static int sony_nc_touchpad_setup(struct platform_device *pd,
unsigned int handle);
static void sony_nc_touchpad_cleanup(struct platform_device *pd);
enum sony_nc_rfkill {
SONY_WIFI,
SONY_BLUETOOTH,
@ -1290,6 +1294,14 @@ static void sony_nc_function_setup(struct acpi_device *device,
/* setup hotkeys */
sony_call_snc_handle(handle, 0x100, &result);
break;
case 0x0105:
case 0x0148:
/* touchpad enable/disable */
result = sony_nc_touchpad_setup(pf_device, handle);
if (result)
pr_err("couldn't set up touchpad control function (%d)\n",
result);
break;
case 0x0115:
case 0x0136:
case 0x013f:
@ -1359,6 +1371,10 @@ static void sony_nc_function_cleanup(struct platform_device *pd)
continue;
switch (handle) {
case 0x0105:
case 0x0148:
sony_nc_touchpad_cleanup(pd);
break;
case 0x0115:
case 0x0136:
case 0x013f:
@ -2376,6 +2392,81 @@ static void sony_nc_highspeed_charging_cleanup(struct platform_device *pd)
}
}
/* Touchpad enable/disable */
struct touchpad_control {
struct device_attribute attr;
int handle;
};
static struct touchpad_control *tp_ctl;
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 (kstrtoul(buffer, 10, &value) || value > 1)
return -EINVAL;
/* sysfs: 0 disabled, 1 enabled
* EC: 0 enabled, 1 disabled
*/
if (sony_call_snc_handle(tp_ctl->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)
{
unsigned int result;
if (sony_call_snc_handle(tp_ctl->handle, 0x000, &result))
return -EINVAL;
return snprintf(buffer, PAGE_SIZE, "%d\n", !(result & 0x01));
}
static int sony_nc_touchpad_setup(struct platform_device *pd,
unsigned int handle)
{
int ret = 0;
tp_ctl = kzalloc(sizeof(struct touchpad_control), GFP_KERNEL);
if (!tp_ctl)
return -ENOMEM;
tp_ctl->handle = handle;
sysfs_attr_init(&tp_ctl->attr.attr);
tp_ctl->attr.attr.name = "touchpad";
tp_ctl->attr.attr.mode = S_IRUGO | S_IWUSR;
tp_ctl->attr.show = sony_nc_touchpad_show;
tp_ctl->attr.store = sony_nc_touchpad_store;
ret = device_create_file(&pd->dev, &tp_ctl->attr);
if (ret) {
kfree(tp_ctl);
tp_ctl = NULL;
}
return ret;
}
static void sony_nc_touchpad_cleanup(struct platform_device *pd)
{
if (tp_ctl) {
device_remove_file(&pd->dev, &tp_ctl->attr);
kfree(tp_ctl);
tp_ctl = NULL;
}
}
static void sony_nc_backlight_ng_read_limits(int handle,
struct sony_backlight_props *props)
{