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HID: allow resizing and replacing report descriptors

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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 <spbnick@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
This commit is contained in:
Nikolai Kondrashov
2010-08-06 23:03:06 +04:00
committed by Jiri Kosina
parent 3cfc2c42c1
commit 73e4008ddd
17 changed files with 72 additions and 56 deletions
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7
drivers/hid/hid-cherry.c
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@@ -26,15 +26,16 @@
* Cherry Cymotion keyboard have an invalid HID report descriptor,
* that needs fixing before we can parse it.
*/
static void ch_report_fixup(struct hid_device *hdev, __u8 *rdesc,
unsigned int rsize)
static __u8 *ch_report_fixup(struct hid_device *hdev, __u8 *rdesc,
unsigned int *rsize)
{
if (rsize >= 17 && rdesc[11] == 0x3c && rdesc[12] == 0x02) {
if (*rsize >= 17 && rdesc[11] == 0x3c && rdesc[12] == 0x02) {
dev_info(&hdev->dev, "fixing up Cherry Cymotion report "
"descriptor\n");
rdesc[11] = rdesc[16] = 0xff;
rdesc[12] = rdesc[17] = 0x03;
}
return rdesc;
}
#define ch_map_key_clear(c) hid_map_usage_clear(hi, usage, bit, max, \