mirrors/linux-stable
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git synced 2024-10-29 23:53:32 +00:00
Code Issues Releases Wiki Activity

Input: synaptics - set dimensions as reported by firmware

Browse source 
Newer Synaptics firmware allows to query maximim dimensions reported by
device, let's use this data.

Tested-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
This commit is contained in:
Dmitry Torokhov 2010-05-10 23:06:52 -07:00
parent a083632eaf
commit 83ba9ea8a0
2 changed files with 27 additions and 11 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

30
drivers/input/mouse/synaptics.c
View file

@ -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
@ -194,24 +196,34 @@ 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 ((res[0] != 0) && (res[1] & 0x80) && (res[2] != 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 (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);

6
drivers/input/mouse/synaptics.h
View file

@ -19,6 +19,7 @@
#define SYN_QUE_RESOLUTION 0x08
#define SYN_QUE_EXT_CAPAB 0x09
#define SYN_QUE_EXT_CAPAB_0C 0x0c
#define SYN_QUE_EXT_DIMENSIONS 0x0d
/* synatics modes */
#define SYN_BIT_ABSOLUTE_MODE (1 << 7)
@ -51,6 +52,7 @@
#define SYN_CAP_MULTI_BUTTON_NO(ec) (((ec) & 0x00f000) >> 12)
#define SYN_CAP_PRODUCT_ID(ec) (((ec) & 0xff0000) >> 16)
#define SYN_CAP_CLICKPAD(ex0c) ((ex0c) & 0x100100)
#define SYN_CAP_MAX_DIMENSIONS(ex0c) ((ex0c) & 0x020000)
/* synaptics modes query bits */
#define SYN_MODE_ABSOLUTE(m) ((m) & (1 << 7))
@ -101,8 +103,8 @@ struct synaptics_data {
unsigned long int ext_cap; /* Extended Capabilities */
unsigned long int ext_cap_0c; /* Ext Caps from 0x0c query */
unsigned long int identity; /* Identification */
int x_res; /* X resolution in units/mm */
int y_res; /* Y resolution in units/mm */
unsigned int x_res, y_res; /* X/Y resolution in units/mm */
unsigned int x_max, y_max; /* Max dimensions (from FW) */
unsigned char pkt_type; /* packet type - old, new, etc */
unsigned char mode; /* current mode byte */