diff options
| author |   Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2008-11-19 17:02:24 -0500 |
|---|---|---|
| committer | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2008-11-24 11:43:21 -0500 |
| commit | a2d781fc8d9b16113dd9440107d73c0f21d7cbef (patch) | |
| tree | a786cce33763680ae05bfbe310f845b127293157 /drivers/input/serio/libps2.c | |
| parent | Input: add support for Wacom W8001 penabled serial touchscreen (diff) | |
| download | linux-dev-a2d781fc8d9b16113dd9440107d73c0f21d7cbef.tar.xz linux-dev-a2d781fc8d9b16113dd9440107d73c0f21d7cbef.zip | |
Input: libps2 - handle 0xfc responses from devices
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
Diffstat (limited to 'drivers/input/serio/libps2.c')
| -rw-r--r-- | drivers/input/serio/libps2.c | 20 |
1 files changed, 16 insertions, 4 deletions
diff --git a/drivers/input/serio/libps2.c b/drivers/input/serio/libps2.c index 2b304c22c200..67248c31e19a 100644 --- a/drivers/input/serio/libps2.c +++ b/drivers/input/serio/libps2.c @@ -262,9 +262,17 @@ int ps2_handle_ack(struct ps2dev *ps2dev, unsigned char data) break; case PS2_RET_NAK: - ps2dev->nak = 1; + ps2dev->flags |= PS2_FLAG_NAK; + ps2dev->nak = PS2_RET_NAK; break; + case PS2_RET_ERR: + if (ps2dev->flags & PS2_FLAG_NAK) { + ps2dev->flags &= ~PS2_FLAG_NAK; + ps2dev->nak = PS2_RET_ERR; + break; + } + /* * Workaround for mice which don't ACK the Get ID command. * These are valid mouse IDs that we recognize. @@ -282,8 +290,11 @@ int ps2_handle_ack(struct ps2dev *ps2dev, unsigned char data) } - if (!ps2dev->nak && ps2dev->cmdcnt) - ps2dev->flags |= PS2_FLAG_CMD | PS2_FLAG_CMD1; + if (!ps2dev->nak) { + ps2dev->flags &= ~PS2_FLAG_NAK; + if (ps2dev->cmdcnt) + ps2dev->flags |= PS2_FLAG_CMD | PS2_FLAG_CMD1; + } ps2dev->flags &= ~PS2_FLAG_ACK; wake_up(&ps2dev->wait); @@ -329,6 +340,7 @@ void ps2_cmd_aborted(struct ps2dev *ps2dev) if (ps2dev->flags & (PS2_FLAG_ACK | PS2_FLAG_CMD)) wake_up(&ps2dev->wait); - ps2dev->flags = 0; + /* reset all flags except last nack */ + ps2dev->flags &= PS2_FLAG_NAK; } EXPORT_SYMBOL(ps2_cmd_aborted); |