diff options
Diffstat (limited to 'drivers/hid/hid-chicony.c')
| -rw-r--r-- | drivers/hid/hid-chicony.c | 26 |
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); |