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authorPeter Wu <peter@lekensteyn.nl>2014-12-16 01:50:14 +0100
committerJiri Kosina <jkosina@suse.cz>2014-12-19 11:44:11 +0100
commitf677bb150c2f7b96ebcd377cd722e9d2649e9400 (patch)
tree7887f94189f6ea7d55a879564f889e3983674a13 /drivers/hid
parentb1ac9487c824a212f3b5bb80df5ac578243b0e21 (diff)
downloadlinux-f677bb150c2f7b96ebcd377cd722e9d2649e9400.tar.bz2
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')
-rw-r--r--drivers/hid/hid-logitech-hidpp.c17
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);
}