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alistair23-linux
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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: Dmitry Torokhov <dtor@mail.ru>
hifive-unleashed-5.1
Dmitry Torokhov 2006-08-04 22:52:26 -04:00
parent 0c19fcd837
commit 184dd2751c
1 changed files with 34 additions and 18 deletions
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52
drivers/input/mouse/trackpoint.c
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@ -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);