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| author | Nikolai Kondrashov <spbnick@gmail.com> | 2010-08-06 23:03:06 +0400 |
|---|---|---|
| committer | Jiri Kosina <jkosina@suse.cz> | 2010-08-09 21:52:42 +0400 |
| commit | 73e4008ddddc84d5f2499c17012b340a0dae153e (patch) | |
| tree | d3adfa8c5792e71c21cb7a9cd18517cce9c92685 /drivers/hid/hid-lg.c | |
| parent | 3cfc2c42c1cbc8e238bb9c0612c0df4565e3a8b4 (diff) | |
| download | linux-73e4008ddddc84d5f2499c17012b340a0dae153e.tar.xz | |
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 <spbnick@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Diffstat (limited to 'drivers/hid/hid-lg.c')
| -rw-r--r-- | drivers/hid/hid-lg.c | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/drivers/hid/hid-lg.c b/drivers/hid/hid-lg.c index f6433d8050a9..68c0b68856c7 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, \ |