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Commit 184dd275 authored by Dmitry Torokhov's avatar Dmitry Torokhov
Browse files

Input: trackpoint - activate protocol when resuming 



Trackpoint driver was not sending the magic knock sequence upon resume
causing incorrect device behavior after resuming from disk.

Signed-off-by: default avatarDmitry Torokhov <dtor@mail.ru>
parent 0c19fcd8

drivers/input/mouse/trackpoint.c

+34 −18
Original line number Diff line number Diff line
@@ -183,21 +183,26 @@ static struct attribute_group trackpoint_attr_group = { 
	.attrs = trackpoint_attrs,

};



static void trackpoint_disconnect(struct psmouse *psmouse)

static int trackpoint_start_protocol(struct psmouse *psmouse, unsigned char *firmware_id)

{

	sysfs_remove_group(&psmouse->ps2dev.serio->dev.kobj, &trackpoint_attr_group);

	unsigned char param[2] = { 0 };



	kfree(psmouse->private);

	psmouse->private = NULL;

	if (ps2_command(&psmouse->ps2dev, param, MAKE_PS2_CMD(0, 2, TP_READ_ID)))

		return -1;



	if (param[0] != TP_MAGIC_IDENT)

		return -1;



	if (firmware_id)

		*firmware_id = param[1];



	return 0;

}



static int trackpoint_sync(struct psmouse *psmouse)

{

	unsigned char toggle;

	struct trackpoint_data *tp = psmouse->private;



	if (!tp)

		return -1;

	unsigned char toggle;



	/* Disable features that may make device unusable with this driver */

	trackpoint_read(&psmouse->ps2dev, TP_TOGGLE_TWOHAND, &toggle);
@@ -263,27 +268,38 @@ static void trackpoint_defaults(struct trackpoint_data *tp) 
	tp->ext_dev = TP_DEF_EXT_DEV;

}



static void trackpoint_disconnect(struct psmouse *psmouse)

{

	sysfs_remove_group(&psmouse->ps2dev.serio->dev.kobj, &trackpoint_attr_group);



	kfree(psmouse->private);

	psmouse->private = NULL;

}



static int trackpoint_reconnect(struct psmouse *psmouse)

{

	if (trackpoint_start_protocol(psmouse, NULL))

		return -1;



	if (trackpoint_sync(psmouse))

		return -1;



	return 0;

}



int trackpoint_detect(struct psmouse *psmouse, int set_properties)

{

	struct trackpoint_data *priv;

	struct ps2dev *ps2dev = &psmouse->ps2dev;

	unsigned char firmware_id;

	unsigned char button_info;

	unsigned char param[2];



	param[0] = param[1] = 0;



	if (ps2_command(ps2dev, param, MAKE_PS2_CMD(0, 2, TP_READ_ID)))

		return -1;



	if (param[0] != TP_MAGIC_IDENT)

	if (trackpoint_start_protocol(psmouse, &firmware_id))

		return -1;



	if (!set_properties)

		return 0;



	firmware_id = param[1];



	if (trackpoint_read(&psmouse->ps2dev, TP_EXT_BTN, &button_info)) {

		printk(KERN_WARNING "trackpoint.c: failed to get extended button data\n");

		button_info = 0;
@@ -296,7 +312,7 @@ int trackpoint_detect(struct psmouse *psmouse, int set_properties) 
	psmouse->vendor = "IBM";

	psmouse->name = "TrackPoint";



	psmouse->reconnect = trackpoint_sync;

	psmouse->reconnect = trackpoint_reconnect;

	psmouse->disconnect = trackpoint_disconnect;



	trackpoint_defaults(priv);