Skip to content
Find file
Fetching contributors…
Cannot retrieve contributors at this time
198 lines (186 sloc) 5.18 KB
---
drivers/input/mouse/Kconfig | 9 +++
drivers/input/mouse/synaptics.c | 111 ++++++++++++++++++++++++++++++++++++++++
drivers/input/mouse/synaptics.h | 3 +
3 files changed, 123 insertions(+)
--- a/drivers/input/mouse/Kconfig
+++ b/drivers/input/mouse/Kconfig
@@ -19,6 +19,7 @@
select SERIO_LIBPS2
select SERIO_I8042 if X86
select SERIO_GSCPS2 if GSC
+ select LEDS_CLASS if MOUSE_PS2_SYNAPICS_LED
help
Say Y here if you have a PS/2 mouse connected to your system. This
includes the standard 2 or 3-button PS/2 mouse, as well as PS/2
@@ -68,6 +69,14 @@
If unsure, say Y.
+config MOUSE_PS2_SYNAPTICS_LED
+ bool "Support embedded LED on Synaptics devices"
+ depends on MOUSE_PS2_SYNAPTICS
+ select NEW_LEDS
+ help
+ Say Y here if you have a Synaptics device with an embedded LED.
+ This will enable LED class driver to control the LED device.
+
config MOUSE_PS2_LIFEBOOK
bool "Fujitsu Lifebook PS/2 mouse protocol extension" if EXPERT
default y
--- a/drivers/input/mouse/synaptics.c
+++ b/drivers/input/mouse/synaptics.c
@@ -28,6 +28,7 @@
#include <linux/input/mt.h>
#include <linux/serio.h>
#include <linux/libps2.h>
+#include <linux/leds.h>
#include <linux/slab.h>
#include "psmouse.h"
#include "synaptics.h"
@@ -395,6 +396,110 @@
serio_register_port(serio);
}
+#ifdef CONFIG_MOUSE_PS2_SYNAPTICS_LED
+/*
+ * LED handling:
+ * Some Synaptics devices have an embeded LED at the top-left corner.
+ */
+
+struct synaptics_led {
+ struct psmouse *psmouse;
+ struct work_struct work;
+ struct led_classdev cdev;
+};
+
+static void synaptics_set_led(struct psmouse *psmouse, int on)
+{
+ int i;
+ unsigned char cmd = on ? 0x88 : 0x10;
+
+ ps2_begin_command(&psmouse->ps2dev);
+ if (__ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSCALE11))
+ goto out;
+ for (i = 6; i >= 0; i -= 2) {
+ unsigned char d = (cmd >> i) & 3;
+ if (__ps2_command(&psmouse->ps2dev, &d, PSMOUSE_CMD_SETRES))
+ goto out;
+ }
+ cmd = 0x0a;
+ __ps2_command(&psmouse->ps2dev, &cmd, PSMOUSE_CMD_SETRATE);
+ out:
+ ps2_end_command(&psmouse->ps2dev);
+}
+
+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->cdev.brightness);
+}
+
+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);
+ schedule_work(&led->work);
+}
+
+static void synaptics_sync_led(struct psmouse *psmouse)
+{
+ struct synaptics_data *priv = psmouse->private;
+
+ if (priv->led)
+ synaptics_set_led(psmouse, priv->led->cdev.brightness);
+}
+
+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;
+}
+
+static void synaptics_free_led(struct psmouse *psmouse)
+{
+ struct synaptics_data *priv = psmouse->private;
+
+ if (!priv->led)
+ return;
+ cancel_work_sync(&priv->led->work);
+ synaptics_set_led(psmouse, 0);
+ led_classdev_unregister(&priv->led->cdev);
+ kfree(priv->led);
+}
+#else
+#define synaptics_init_led(ps) 0
+#define synaptics_free_led(ps) do {} while (0)
+#define synaptics_sync_led(ps) do {} while (0)
+#endif
+
/*****************************************************************************
* Functions to interpret the absolute mode packets
****************************************************************************/
@@ -746,6 +851,7 @@
static void synaptics_disconnect(struct psmouse *psmouse)
{
+ synaptics_free_led(psmouse);
synaptics_reset(psmouse);
kfree(psmouse->private);
psmouse->private = NULL;
@@ -798,6 +904,8 @@
return -1;
}
+ synaptics_sync_led(psmouse);
+
return 0;
}
@@ -907,6 +1015,9 @@
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);
/*
--- a/drivers/input/mouse/synaptics.h
+++ b/drivers/input/mouse/synaptics.h
@@ -122,6 +122,8 @@
signed char scroll;
};
+struct synaptics_led;
+
struct synaptics_data {
/* Data read from the touchpad */
unsigned long int model_id; /* Model-ID */
@@ -135,6 +137,7 @@
unsigned char pkt_type; /* packet type - old, new, etc */
unsigned char mode; /* current mode byte */
int scroll;
+ struct synaptics_led *led;
struct serio *pt_port; /* Pass-through serio port */
Something went wrong with that request. Please try again.