diff options
Diffstat (limited to 'drivers/input/mouse/synaptics.c')
| -rw-r--r-- | drivers/input/mouse/synaptics.c | 32 |
1 files changed, 23 insertions, 9 deletions
diff --git a/drivers/input/mouse/synaptics.c b/drivers/input/mouse/synaptics.c index ebd7a99efea..52bb1de32e4 100644 --- a/drivers/input/mouse/synaptics.c +++ b/drivers/input/mouse/synaptics.c @@ -36,6 +36,8 @@ * The x/y limits are taken from the Synaptics TouchPad interfacing Guide, * section 2.3.2, which says that they should be valid regardless of the * actual size of the sensor. + * Note that newer firmware allows querying device for maximum useable + * coordinates. */ #define XMIN_NOMINAL 1472 #define XMAX_NOMINAL 5472 @@ -194,23 +196,33 @@ static int synaptics_identify(struct psmouse *psmouse) } /* - * Read touchpad resolution + * Read touchpad resolution and maximum reported coordinates * 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]; + unsigned char max[3]; if (SYN_ID_MAJOR(priv->identity) < 4) - return 0; - if (synaptics_send_cmd(psmouse, SYN_QUE_RESOLUTION, res)) - return 0; + if (synaptics_send_cmd(psmouse, SYN_QUE_RESOLUTION, res) == 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 */ + } + } - 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 */ + if (SYN_EXT_CAP_REQUESTS(priv->capabilities) >= 5 && + SYN_CAP_MAX_DIMENSIONS(priv->ext_cap_0c)) { + if (synaptics_send_cmd(psmouse, SYN_QUE_EXT_DIMENSIONS, max)) { + printk(KERN_ERR "Synaptics claims to have dimensions query," + " but I'm not able to read it.\n"); + } else { + priv->x_max = (max[0] << 5) | ((max[1] & 0x0f) << 1); + priv->y_max = (max[2] << 5) | ((max[1] & 0xf0) >> 3); + } } return 0; @@ -578,8 +590,10 @@ static void set_input_params(struct input_dev *dev, struct synaptics_data *priv) int i; __set_bit(EV_ABS, dev->evbit); - input_set_abs_params(dev, ABS_X, XMIN_NOMINAL, XMAX_NOMINAL, 0, 0); - input_set_abs_params(dev, ABS_Y, YMIN_NOMINAL, YMAX_NOMINAL, 0, 0); + input_set_abs_params(dev, ABS_X, + XMIN_NOMINAL, priv->x_max ?: XMAX_NOMINAL, 0, 0); + input_set_abs_params(dev, ABS_Y, + YMIN_NOMINAL, priv->y_max ?: YMAX_NOMINAL, 0, 0); input_set_abs_params(dev, ABS_PRESSURE, 0, 255, 0, 0); __set_bit(ABS_TOOL_WIDTH, dev->absbit); |