diff options
| author | Peter Wu <peter@lekensteyn.nl> | 2014-12-16 01:50:14 +0100 |
|---|---|---|
| committer | Jiri Kosina <jkosina@suse.cz> | 2014-12-19 11:44:11 +0100 |
| commit | f677bb150c2f7b96ebcd377cd722e9d2649e9400 (patch) | |
| tree | 7887f94189f6ea7d55a879564f889e3983674a13 /drivers/hid/hid-logitech-hidpp.c | |
| parent | b1ac9487c824a212f3b5bb80df5ac578243b0e21 (diff) | |
| download | lwn-f677bb150c2f7b96ebcd377cd722e9d2649e9400.tar.gz lwn-f677bb150c2f7b96ebcd377cd722e9d2649e9400.zip | |
HID: logitech-hidpp: detect HID++ 2.0 errors too
Devices speaking HID++ 2.0 report a different error code (0xff). Detect
these errors too to avoid 5 second delays when the device reports an
error. Caught by... well, a bug in the QEMU emulation of this receiver.
Renamed fap to rap for HID++ 1.0 errors because it is more logical,
it has no functional difference.
Signed-off-by: Peter Wu <peter@lekensteyn.nl>
Reviewed-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Diffstat (limited to 'drivers/hid/hid-logitech-hidpp.c')
| -rw-r--r-- | drivers/hid/hid-logitech-hidpp.c | 17 |
1 files changed, 14 insertions, 3 deletions
diff --git a/drivers/hid/hid-logitech-hidpp.c b/drivers/hid/hid-logitech-hidpp.c index 7efbd8bd49c1..cf5795552bcc 100644 --- a/drivers/hid/hid-logitech-hidpp.c +++ b/drivers/hid/hid-logitech-hidpp.c @@ -105,6 +105,7 @@ struct hidpp_device { }; +/* HID++ 1.0 error codes */ #define HIDPP_ERROR 0x8f #define HIDPP_ERROR_SUCCESS 0x00 #define HIDPP_ERROR_INVALID_SUBID 0x01 @@ -119,6 +120,8 @@ struct hidpp_device { #define HIDPP_ERROR_REQUEST_UNAVAILABLE 0x0a #define HIDPP_ERROR_INVALID_PARAM_VALUE 0x0b #define HIDPP_ERROR_WRONG_PIN_CODE 0x0c +/* HID++ 2.0 error codes */ +#define HIDPP20_ERROR 0xff static void hidpp_connect_event(struct hidpp_device *hidpp_dev); @@ -192,9 +195,16 @@ static int hidpp_send_message_sync(struct hidpp_device *hidpp, } if (response->report_id == REPORT_ID_HIDPP_SHORT && - response->fap.feature_index == HIDPP_ERROR) { + response->rap.sub_id == HIDPP_ERROR) { + ret = response->rap.params[1]; + dbg_hid("%s:got hidpp error %02X\n", __func__, ret); + goto exit; + } + + if (response->report_id == REPORT_ID_HIDPP_LONG && + response->fap.feature_index == HIDPP20_ERROR) { ret = response->fap.params[1]; - dbg_hid("__hidpp_send_report got hidpp error %02X\n", ret); + dbg_hid("%s:got hidpp 2.0 error %02X\n", __func__, ret); goto exit; } @@ -271,7 +281,8 @@ static inline bool hidpp_match_answer(struct hidpp_report *question, static inline bool hidpp_match_error(struct hidpp_report *question, struct hidpp_report *answer) { - return (answer->fap.feature_index == HIDPP_ERROR) && + return ((answer->rap.sub_id == HIDPP_ERROR) || + (answer->fap.feature_index == HIDPP20_ERROR)) && (answer->fap.funcindex_clientid == question->fap.feature_index) && (answer->fap.params[0] == question->fap.funcindex_clientid); } |