diff options
| author | Tero Saarni <tero.saarni@gmail.com> | 2009-06-10 23:27:24 -0700 |
|---|---|---|
| committer | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2009-06-19 22:55:17 -0700 |
| commit | ec20a022aa24fc63d3ab59584cb1e5aa9a21d46c (patch) | |
| tree | 671086529e62fcb541fb03422010d1eeae09b00a /drivers/input/mouse | |
| parent | d7ed5d883c09c5474f842dcb148515dfaef2a567 (diff) | |
Input: synaptics - add support for reporting x/y resolution
Synaptics uses anisotropic coordinate system. On some wide touchpads
vertical resolution can be twice as high as horizontal which causes
unequal sensitivity on x/y directions. Add support for reading the
resolution with EVIOCGABS ioctl.
Signed-off-by: Tero Saarni <tero.saarni@gmail.com>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
Diffstat (limited to 'drivers/input/mouse')
| -rw-r--r-- | drivers/input/mouse/synaptics.c | 28 | ||||
| -rw-r--r-- | drivers/input/mouse/synaptics.h | 2 |
2 files changed, 30 insertions, 0 deletions
diff --git a/drivers/input/mouse/synaptics.c b/drivers/input/mouse/synaptics.c index f3e4f7b0240..19984bf06ca 100644 --- a/drivers/input/mouse/synaptics.c +++ b/drivers/input/mouse/synaptics.c @@ -180,6 +180,29 @@ static int synaptics_identify(struct psmouse *psmouse) return -1; } +/* + * Read touchpad resolution + * Resolution is left zero if touchpad does not support the query + */ +static int synaptics_resolution(struct psmouse *psmouse) +{ + struct synaptics_data *priv = psmouse->private; + unsigned char res[3]; + + if (SYN_ID_MAJOR(priv->identity) < 4) + return 0; + + if (synaptics_send_cmd(psmouse, SYN_QUE_RESOLUTION, res)) + return 0; + + if ((res[0] != 0) && (res[1] & 0x80) && (res[2] != 0)) { + priv->x_res = res[0]; /* x resolution in units/mm */ + priv->y_res = res[2]; /* y resolution in units/mm */ + } + + return 0; +} + static int synaptics_query_hardware(struct psmouse *psmouse) { if (synaptics_identify(psmouse)) @@ -188,6 +211,8 @@ static int synaptics_query_hardware(struct psmouse *psmouse) return -1; if (synaptics_capability(psmouse)) return -1; + if (synaptics_resolution(psmouse)) + return -1; return 0; } @@ -563,6 +588,9 @@ static void set_input_params(struct input_dev *dev, struct synaptics_data *priv) clear_bit(EV_REL, dev->evbit); clear_bit(REL_X, dev->relbit); clear_bit(REL_Y, dev->relbit); + + dev->absres[ABS_X] = priv->x_res; + dev->absres[ABS_Y] = priv->y_res; } static void synaptics_disconnect(struct psmouse *psmouse) diff --git a/drivers/input/mouse/synaptics.h b/drivers/input/mouse/synaptics.h index 02aa4cf7bc7..30238215175 100644 --- a/drivers/input/mouse/synaptics.h +++ b/drivers/input/mouse/synaptics.h @@ -97,6 +97,8 @@ struct synaptics_data { unsigned long int capabilities; /* Capabilities */ unsigned long int ext_cap; /* Extended Capabilities */ unsigned long int identity; /* Identification */ + int x_res; /* X resolution in units/mm */ + int y_res; /* Y resolution in units/mm */ unsigned char pkt_type; /* packet type - old, new, etc */ unsigned char mode; /* current mode byte */ |