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path: root/drivers/hid/hid-chicony.c
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Diffstat (limited to 'drivers/hid/hid-chicony.c')
-rw-r--r--drivers/hid/hid-chicony.c26
1 files changed, 26 insertions, 0 deletions
diff --git a/drivers/hid/hid-chicony.c b/drivers/hid/hid-chicony.c
index b613d5a79684..bc3cec199fee 100644
--- a/drivers/hid/hid-chicony.c
+++ b/drivers/hid/hid-chicony.c
@@ -20,6 +20,7 @@
#include <linux/input.h>
#include <linux/hid.h>
#include <linux/module.h>
+#include <linux/usb.h>
#include "hid-ids.h"
@@ -57,10 +58,34 @@ static int ch_input_mapping(struct hid_device *hdev, struct hid_input *hi,
return 1;
}
+static __u8 *ch_switch12_report_fixup(struct hid_device *hdev, __u8 *rdesc,
+ unsigned int *rsize)
+{
+ struct usb_interface *intf = to_usb_interface(hdev->dev.parent);
+
+ if (intf->cur_altsetting->desc.bInterfaceNumber == 1) {
+ /* Change usage maximum and logical maximum from 0x7fff to
+ * 0x2fff, so they don't exceed HID_MAX_USAGES */
+ switch (hdev->product) {
+ case USB_DEVICE_ID_CHICONY_ACER_SWITCH12:
+ if (*rsize >= 128 && rdesc[64] == 0xff && rdesc[65] == 0x7f
+ && rdesc[69] == 0xff && rdesc[70] == 0x7f) {
+ hid_info(hdev, "Fixing up report descriptor\n");
+ rdesc[65] = rdesc[70] = 0x2f;
+ }
+ break;
+ }
+
+ }
+ return rdesc;
+}
+
+
static const struct hid_device_id ch_devices[] = {
{ HID_USB_DEVICE(USB_VENDOR_ID_CHICONY, USB_DEVICE_ID_CHICONY_TACTICAL_PAD) },
{ HID_USB_DEVICE(USB_VENDOR_ID_CHICONY, USB_DEVICE_ID_CHICONY_WIRELESS2) },
{ HID_USB_DEVICE(USB_VENDOR_ID_CHICONY, USB_DEVICE_ID_CHICONY_AK1D) },
+ { HID_USB_DEVICE(USB_VENDOR_ID_CHICONY, USB_DEVICE_ID_CHICONY_ACER_SWITCH12) },
{ }
};
MODULE_DEVICE_TABLE(hid, ch_devices);
@@ -68,6 +93,7 @@ MODULE_DEVICE_TABLE(hid, ch_devices);
static struct hid_driver ch_driver = {
.name = "chicony",
.id_table = ch_devices,
+ .report_fixup = ch_switch12_report_fixup,
.input_mapping = ch_input_mapping,
};
module_hid_driver(ch_driver);