[PATCH 36/140] asus-laptop: add light sensor support

Len Brown
2007-02-07T18:53:54Z

From: Corentin Chary <corentincj@iksaif.net>

/proc/acpi/asus/lslvl is now /sys/.../asus-laptop/ls_level
/proc/acpi/asus/lssw is now /sys/.../asus-laptop/ls_switch nothing
else ..

Signed-off-by: Corentin Chary <corentincj@iksaif.net>
Signed-off-by: Len Brown <len.brown@intel.com>
---
drivers/misc/asus-laptop.c | 84 ++++++++++++++++++++++++++++++++++++++++++++
1 files changed, 84 insertions(+), 0 deletions(-)

diff --git a/drivers/misc/asus-laptop.c b/drivers/misc/asus-laptop.c
index bd963c6..6f72cd5 100644
--- a/drivers/misc/asus-laptop.c
+++ b/drivers/misc/asus-laptop.c
@@ -145,6 +145,9 @@ ASUS_HANDLE(display_get,
"\\INFB", /* A2H D1 L2D L3D L3H L2E L5D L5C M1A M2E L4L W3V */
"\\SSTE"); /* A3F A6F A3N A3L M6N W3N W6A */

+ASUS_HANDLE(ls_switch, ASUS_HOTK_PREFIX "ALSC"); /* Z71A Z71V */
+ASUS_HANDLE(ls_level, ASUS_HOTK_PREFIX "ALSL"); /* Z71A Z71V */
+
/*
* This is the main structure, we can use it to store anything interesting
* about the hotk device
@@ -155,6 +158,8 @@ struct asus_hotk {
acpi_handle handle; //the handle of the hotk device
char status; //status of the hotk, for LEDs, ...
u32 ledd_status; //status of the LED display
+ u8 light_level; //light sensor level
+ u8 light_switch; //light sensor switch value
u16 event_count[128]; //count for each event TODO make this better
};

@@ -590,6 +595,62 @@ static ssize_t store_disp(struct device *dev, struct device_attribute *attr,
return rv;
}

+/*
+ * Light Sens
+ */
+static void set_light_sens_switch(int value)
+{
+ if (!write_acpi_int(ls_switch_handle, NULL, value, NULL))
+ printk(ASUS_WARNING "Error setting light sensor switch\n");
+ hotk->light_switch = value;
+}
+
+static ssize_t show_lssw(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ return sprintf(buf, "%d\n", hotk->light_switch);
+}
+
+static ssize_t store_lssw(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)
+ set_light_sens_switch(value ? 1 : 0);
+
+ return rv;
+}
+
+static void set_light_sens_level(int value)
+{
+ if (!write_acpi_int(ls_level_handle, NULL, value, NULL))
+ printk(ASUS_WARNING "Error setting light sensor level\n");
+ hotk->light_level = value;
+}
+
+static ssize_t show_lslvl(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ return sprintf(buf, "%d\n", hotk->light_level);
+}
+
+static ssize_t store_lslvl(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) {
+ value = (0 < value) ? ((15 < value) ? 15 : value) : 0;
+ /* 0 <= value <= 15 */
+ set_light_sens_level(value);
+ }
+
+ return rv;
+}
+
static void asus_hotk_notify(acpi_handle handle, u32 event, void *data)
{
/* TODO Find a better way to handle events count. */
@@ -636,6 +697,8 @@ static ASUS_CREATE_DEVICE_ATTR(wlan);
static ASUS_CREATE_DEVICE_ATTR(bluetooth);
static ASUS_CREATE_DEVICE_ATTR(display);
static ASUS_CREATE_DEVICE_ATTR(ledd);
+static ASUS_CREATE_DEVICE_ATTR(ls_switch);
+static ASUS_CREATE_DEVICE_ATTR(ls_level);

static struct attribute *asuspf_attributes[] = {
&dev_attr_infos.attr,
@@ -643,6 +706,8 @@ static struct attribute *asuspf_attributes[] = {
&dev_attr_bluetooth.attr,
&dev_attr_display.attr,
&dev_attr_ledd.attr,
+ &dev_attr_ls_switch.attr,
+ &dev_attr_ls_level.attr,
NULL
};

@@ -679,6 +744,10 @@ static void asus_hotk_add_fs(void)
if (ledd_set_handle)
ASUS_SET_DEVICE_ATTR(ledd, 0644, show_ledd, store_ledd);

+ if (ls_switch_handle && ls_level_handle) {
+ ASUS_SET_DEVICE_ATTR(ls_level, 0644, show_lslvl, store_lslvl);
+ ASUS_SET_DEVICE_ATTR(ls_switch, 0644, show_lssw, store_lssw);
+ }
}

static int asus_handle_init(char *name, acpi_handle *handle,
@@ -800,6 +869,11 @@ static int asus_hotk_get_info(void)
ASUS_HANDLE_INIT(display_set);
ASUS_HANDLE_INIT(display_get);

+ /* There is a lot of models with "ALSL", but a few get
+ a real light sens, so we need to check it. */
+ if(ASUS_HANDLE_INIT(ls_switch))
+ ASUS_HANDLE_INIT(ls_level);
+
kfree(model);

return AE_OK;
@@ -874,6 +948,16 @@ static int asus_hotk_add(struct acpi_device *device)
/* LED display is off by default */
hotk->ledd_status = 0xFFF;

+ /* Set initial values of light sensor and level */
+ hotk->light_switch = 1; /* Default to light sensor disabled */
+ hotk->light_level = 0; /* level 5 for sensor sensitivity */
+
+ if (ls_switch_handle)
+ set_light_sens_switch(hotk->light_switch);
+
+ if (ls_level_handle)
+ set_light_sens_level(hotk->light_level);
+
end:
if (result) {
kfree(hotk->name);
--
1.5.0.rc3.39.gec804