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path: root/drivers/hid/hid-lenovo.c
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Diffstat (limited to 'drivers/hid/hid-lenovo.c')
-rw-r--r--drivers/hid/hid-lenovo.c53
1 files changed, 45 insertions, 8 deletions
diff --git a/drivers/hid/hid-lenovo.c b/drivers/hid/hid-lenovo.c
index 0320b96ddf24..a56b9e7413ce 100644
--- a/drivers/hid/hid-lenovo.c
+++ b/drivers/hid/hid-lenovo.c
@@ -1,5 +1,6 @@
/*
- * HID driver for Lenovo ThinkPad USB Keyboard with TrackPoint
+ * HID driver for Lenovo:
+ * - ThinkPad USB Keyboard with TrackPoint (tpkbd)
*
* Copyright (c) 2012 Bernhard Seibold
*/
@@ -39,7 +40,7 @@ static int lenovo_input_mapping_tpkbd(struct hid_device *hdev,
struct hid_usage *usage, unsigned long **bit, int *max)
{
if (usage->hid == (HID_UP_BUTTON | 0x0010)) {
- /* mark the device as pointer */
+ /* This sub-device contains trackpoint, mark it */
hid_set_drvdata(hdev, (void *)1);
map_key_clear(KEY_MICMUTE);
return 1;
@@ -47,6 +48,19 @@ static int lenovo_input_mapping_tpkbd(struct hid_device *hdev,
return 0;
}
+static int lenovo_input_mapping(struct hid_device *hdev,
+ struct hid_input *hi, struct hid_field *field,
+ struct hid_usage *usage, unsigned long **bit, int *max)
+{
+ switch (hdev->product) {
+ case USB_DEVICE_ID_LENOVO_TPKBD:
+ return lenovo_input_mapping_tpkbd(hdev, hi, field,
+ usage, bit, max);
+ default:
+ return 0;
+ }
+}
+
#undef map_key_clear
static int lenovo_features_set_tpkbd(struct hid_device *hdev)
@@ -337,6 +351,15 @@ static int lenovo_probe_tpkbd(struct hid_device *hdev)
char *name_mute, *name_micmute;
int i;
+ /*
+ * Only register extra settings against subdevice where input_mapping
+ * set drvdata to 1, i.e. the trackpoint.
+ */
+ if (!hid_get_drvdata(hdev))
+ return 0;
+
+ hid_set_drvdata(hdev, NULL);
+
/* Validate required reports. */
for (i = 0; i < 4; i++) {
if (!hid_validate_values(hdev, HID_FEATURE_REPORT, 4, i, 1))
@@ -409,12 +432,16 @@ static int lenovo_probe(struct hid_device *hdev,
goto err;
}
- if (hid_get_drvdata(hdev)) {
- hid_set_drvdata(hdev, NULL);
+ switch (hdev->product) {
+ case USB_DEVICE_ID_LENOVO_TPKBD:
ret = lenovo_probe_tpkbd(hdev);
- if (ret)
- goto err_hid;
+ break;
+ default:
+ ret = 0;
+ break;
}
+ if (ret)
+ goto err_hid;
return 0;
err_hid:
@@ -427,6 +454,13 @@ static void lenovo_remove_tpkbd(struct hid_device *hdev)
{
struct lenovo_drvdata_tpkbd *data_pointer = hid_get_drvdata(hdev);
+ /*
+ * Only the trackpoint half of the keyboard has drvdata and stuff that
+ * needs unregistering.
+ */
+ if (data_pointer == NULL)
+ return;
+
sysfs_remove_group(&hdev->dev.kobj,
&lenovo_attr_group_tpkbd);
@@ -438,8 +472,11 @@ static void lenovo_remove_tpkbd(struct hid_device *hdev)
static void lenovo_remove(struct hid_device *hdev)
{
- if (hid_get_drvdata(hdev))
+ switch (hdev->product) {
+ case USB_DEVICE_ID_LENOVO_TPKBD:
lenovo_remove_tpkbd(hdev);
+ break;
+ }
hid_hw_stop(hdev);
}
@@ -454,7 +491,7 @@ MODULE_DEVICE_TABLE(hid, lenovo_devices);
static struct hid_driver lenovo_driver = {
.name = "lenovo",
.id_table = lenovo_devices,
- .input_mapping = lenovo_input_mapping_tpkbd,
+ .input_mapping = lenovo_input_mapping,
.probe = lenovo_probe,
.remove = lenovo_remove,
};