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path: root/drivers/hid/hid-logitech-dj.c
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Diffstat (limited to 'drivers/hid/hid-logitech-dj.c')
-rw-r--r--drivers/hid/hid-logitech-dj.c24
1 files changed, 21 insertions, 3 deletions
diff --git a/drivers/hid/hid-logitech-dj.c b/drivers/hid/hid-logitech-dj.c
index feddacd87b8b..9bc39421627f 100644
--- a/drivers/hid/hid-logitech-dj.c
+++ b/drivers/hid/hid-logitech-dj.c
@@ -667,6 +667,9 @@ static void logi_dj_ll_close(struct hid_device *hid)
dbg_hid("%s:%s\n", __func__, hid->phys);
}
+static u8 unifying_name_query[] = {0x10, 0xff, 0x83, 0xb5, 0x40, 0x00, 0x00};
+static u8 unifying_name_answer[] = {0x11, 0xff, 0x83, 0xb5};
+
static int logi_dj_ll_raw_request(struct hid_device *hid,
unsigned char reportnum, __u8 *buf,
size_t count, unsigned char report_type,
@@ -682,7 +685,13 @@ static int logi_dj_ll_raw_request(struct hid_device *hid,
if (count < 2)
return -EINVAL;
- buf[1] = djdev->device_index;
+ /* special case where we should not overwrite
+ * the device_index */
+ if (count == 7 && !memcmp(buf, unifying_name_query,
+ sizeof(unifying_name_query)))
+ buf[4] |= djdev->device_index - 1;
+ else
+ buf[1] = djdev->device_index;
return hid_hw_raw_request(djrcv_dev->hdev, reportnum, buf,
count, report_type, reqtype);
}
@@ -873,8 +882,17 @@ static int logi_dj_hidpp_event(struct hid_device *hdev,
unsigned long flags;
u8 device_index = dj_report->device_index;
- if (device_index == HIDPP_RECEIVER_INDEX)
- return false;
+ if (device_index == HIDPP_RECEIVER_INDEX) {
+ /* special case were the device wants to know its unifying
+ * name */
+ if (size == HIDPP_REPORT_LONG_LENGTH &&
+ !memcmp(data, unifying_name_answer,
+ sizeof(unifying_name_answer)) &&
+ ((data[4] & 0xF0) == 0x40))
+ device_index = (data[4] & 0x0F) + 1;
+ else
+ return false;
+ }
/*
* Data is from the HID++ collection, in this case, we forward the