@@ -28,6 +28,7 @@
#include <linux/input.h>
#include <linux/serio.h>
#include <linux/libps2.h>
+#include <linux/leds.h>
#include <linux/slab.h>
#include "psmouse.h"
#include "synaptics.h"
@@ -335,6 +336,79 @@ static void synaptics_pt_create(struct psmouse *psmouse)
serio_register_port(serio);
}
+/*
+ * LED handling:
+ * Some Synaptics devices have an embeded LED at the top-left corner.
+ */
+
+struct synaptics_led {
+ enum led_brightness status;
+ struct psmouse *psmouse;
+ struct work_struct work;
+ struct led_classdev cdev;
+};
+
+static void synaptics_set_led(struct psmouse *psmouse, int on)
+{
+ unsigned char param[1];
+
+ if (psmouse_sliced_command(psmouse, on ? 0x88 : 0x10))
+ return;
+ param[0] = 0x0a;
+ ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_SETRATE);
+}
+
+static void synaptics_led_work(struct work_struct *work)
+{
+ struct synaptics_led *led;
+
+ led = container_of(work, struct synaptics_led, work);
+ synaptics_set_led(led->psmouse, led->status);
+}
+
+static void synaptics_led_cdev_brightness_set(struct led_classdev *cdev,
+ enum led_brightness value)
+{
+ struct synaptics_led *led;
+
+ led = container_of(cdev, struct synaptics_led, cdev);
+ if (value != led->status) {
+ led->status = value;
+ schedule_work(&led->work);
+ }
+}
+
+static int synaptics_init_led(struct psmouse *psmouse)
+{
+ struct synaptics_data *priv = psmouse->private;
+ struct synaptics_led *led;
+ int err;
+
+ /* FIXME: LED is supposedly detectable in cap0c[1] 0x20, but it seems
+ * not working on real machines.
+ * So we check the product id to be sure.
+ */
+ if (!priv->ext_cap_0c || SYN_CAP_PRODUCT_ID(priv->ext_cap) != 0xe4)
+ return 0;
+
+ printk(KERN_INFO "synaptics: support LED control\n");
+ led = kzalloc(sizeof(struct synaptics_led), GFP_KERNEL);
+ if (!led)
+ return -ENOMEM;
+ led->psmouse = psmouse;
+ INIT_WORK(&led->work, synaptics_led_work);
+ led->cdev.name = "psmouse::synaptics";
+ led->cdev.brightness_set = synaptics_led_cdev_brightness_set;
+ led->cdev.flags = LED_CORE_SUSPENDRESUME;
+ err = led_classdev_register(NULL, &led->cdev);
+ if (err < 0) {
+ kfree(led);
+ return err;
+ }
+ priv->led = led;
+ return 0;
+}
+
/*****************************************************************************
* Functions to interpret the absolute mode packets
****************************************************************************/
@@ -622,6 +696,14 @@ static void set_input_params(struct input_dev *dev, struct synaptics_data *priv)
static void synaptics_disconnect(struct psmouse *psmouse)
{
+ struct synaptics_data *priv = psmouse->private;
+
+ if (priv->led) {
+ cancel_work_sync(&priv->led->work);
+ synaptics_set_led(psmouse, 0);
+ led_classdev_unregister(&priv->led->cdev);
+ kfree(priv->led);
+ }
synaptics_reset(psmouse);
kfree(psmouse->private);
psmouse->private = NULL;
@@ -653,6 +735,9 @@ static int synaptics_reconnect(struct psmouse *psmouse)
return -1;
}
+ if (priv->led)
+ synaptics_set_led(psmouse, priv->led->status);
+
return 0;
}
@@ -727,6 +812,9 @@ int synaptics_init(struct psmouse *psmouse)
SYN_ID_MAJOR(priv->identity), SYN_ID_MINOR(priv->identity),
priv->model_id, priv->capabilities, priv->ext_cap, priv->ext_cap_0c);
+ if (synaptics_init_led(psmouse) < 0)
+ goto init_fail;
+
set_input_params(psmouse->dev, priv);
/*
@@ -94,6 +94,8 @@ struct synaptics_hw_state {
signed char scroll;
};
+struct synaptics_led;
+
struct synaptics_data {
/* Data read from the touchpad */
unsigned long int model_id; /* Model-ID */
@@ -107,6 +109,7 @@ struct synaptics_data {
unsigned char pkt_type; /* packet type - old, new, etc */
unsigned char mode; /* current mode byte */
int scroll;
+ struct synaptics_led *led;
};
void synaptics_module_init(void);