From 73e4008ddddc84d5f2499c17012b340a0dae153e Mon Sep 17 00:00:00 2001 From: Nikolai Kondrashov Date: Fri, 6 Aug 2010 23:03:06 +0400 Subject: HID: allow resizing and replacing report descriptors Update hid_driver's report_fixup prototype to allow changing report descriptor size and/or returning completely different report descriptor. Update existing usage accordingly. This is to give more freedom in descriptor fixup and to allow having a whole fixed descriptor in the code for the sake of readability. Signed-off-by: Nikolai Kondrashov Signed-off-by: Jiri Kosina --- drivers/hid/hid-lg.c | 9 +++++---- 1 file changed, 5 insertions(+), 4 deletions(-) (limited to 'drivers/hid/hid-lg.c') diff --git a/drivers/hid/hid-lg.c b/drivers/hid/hid-lg.c index f6433d8..68c0b68 100644 --- a/drivers/hid/hid-lg.c +++ b/drivers/hid/hid-lg.c @@ -41,25 +41,26 @@ * above the logical maximum described in descriptor. This extends * the original value of 0x28c of logical maximum to 0x104d */ -static void lg_report_fixup(struct hid_device *hdev, __u8 *rdesc, - unsigned int rsize) +static __u8 *lg_report_fixup(struct hid_device *hdev, __u8 *rdesc, + unsigned int *rsize) { unsigned long quirks = (unsigned long)hid_get_drvdata(hdev); - if ((quirks & LG_RDESC) && rsize >= 90 && rdesc[83] == 0x26 && + if ((quirks & LG_RDESC) && *rsize >= 90 && rdesc[83] == 0x26 && rdesc[84] == 0x8c && rdesc[85] == 0x02) { dev_info(&hdev->dev, "fixing up Logitech keyboard report " "descriptor\n"); rdesc[84] = rdesc[89] = 0x4d; rdesc[85] = rdesc[90] = 0x10; } - if ((quirks & LG_RDESC_REL_ABS) && rsize >= 50 && + if ((quirks & LG_RDESC_REL_ABS) && *rsize >= 50 && rdesc[32] == 0x81 && rdesc[33] == 0x06 && rdesc[49] == 0x81 && rdesc[50] == 0x06) { dev_info(&hdev->dev, "fixing up rel/abs in Logitech " "report descriptor\n"); rdesc[33] = rdesc[50] = 0x02; } + return rdesc; } #define lg_map_key_clear(c) hid_map_usage_clear(hi, usage, bit, max, \ -- cgit v1.1