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hid: egalax: Setup input device manually

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The hid core does not yet handle input filtering. Take over the setup
of the input device, so that proper signal-to-noise ratios can be
used.

Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Cc: Stephane Chatty <chatty@enac.fr>
Signed-off-by: Henrik Rydberg <rydberg@euromail.se>
This commit is contained in:
Henrik Rydberg 2010-11-27 17:56:17 +01:00
parent e42a98b520
commit 4a864183fb
1 changed files with 22 additions and 12 deletions
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34
drivers/hid/hid-egalax.c
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@ -34,10 +34,21 @@ struct egalax_data {
__u16 lastx, lasty, lastz; /* latest valid (x, y, z) in the frame */
};
static void set_abs(struct input_dev *input, unsigned int code,
struct hid_field *field, int snratio)
{
int fmin = field->logical_minimum;
int fmax = field->logical_maximum;
int fuzz = snratio ? (fmax - fmin) / snratio : 0;
input_set_abs_params(input, code, fmin, fmax, fuzz, 0);
}
static int egalax_input_mapping(struct hid_device *hdev, struct hid_input *hi,
struct hid_field *field, struct hid_usage *usage,
unsigned long **bit, int *max)
{
struct input_dev *input = hi->input;
switch (usage->hid & HID_USAGE_PAGE) {
case HID_UP_GENDESK:
@ -45,18 +56,16 @@ static int egalax_input_mapping(struct hid_device *hdev, struct hid_input *hi,
case HID_GD_X:
hid_map_usage(hi, usage, bit, max,
EV_ABS, ABS_MT_POSITION_X);
set_abs(input, ABS_MT_POSITION_X, field, 0);
/* touchscreen emulation */
input_set_abs_params(hi->input, ABS_X,
field->logical_minimum,
field->logical_maximum, 0, 0);
set_abs(input, ABS_X, field, 0);
return 1;
case HID_GD_Y:
hid_map_usage(hi, usage, bit, max,
EV_ABS, ABS_MT_POSITION_Y);
set_abs(input, ABS_MT_POSITION_Y, field, 0);
/* touchscreen emulation */
input_set_abs_params(hi->input, ABS_Y,
field->logical_minimum,
field->logical_maximum, 0, 0);
set_abs(input, ABS_Y, field, 0);
return 1;
}
return 0;
@ -66,6 +75,7 @@ static int egalax_input_mapping(struct hid_device *hdev, struct hid_input *hi,
case HID_DG_TIPSWITCH:
/* touchscreen emulation */
hid_map_usage(hi, usage, bit, max, EV_KEY, BTN_TOUCH);
input_set_capability(input, EV_KEY, BTN_TOUCH);
return 1;
case HID_DG_INRANGE:
case HID_DG_CONFIDENCE:
@ -75,14 +85,14 @@ static int egalax_input_mapping(struct hid_device *hdev, struct hid_input *hi,
case HID_DG_CONTACTID:
hid_map_usage(hi, usage, bit, max,
EV_ABS, ABS_MT_TRACKING_ID);
set_abs(input, ABS_MT_TRACKING_ID, field, 0);
return 1;
case HID_DG_TIPPRESSURE:
hid_map_usage(hi, usage, bit, max,
EV_ABS, ABS_MT_PRESSURE);
set_abs(input, ABS_MT_PRESSURE, field, 0);
/* touchscreen emulation */
input_set_abs_params(hi->input, ABS_PRESSURE,
field->logical_minimum,
field->logical_maximum, 0, 0);
set_abs(input, ABS_PRESSURE, field, 0);
return 1;
}
return 0;
@ -96,10 +106,10 @@ static int egalax_input_mapped(struct hid_device *hdev, struct hid_input *hi,
struct hid_field *field, struct hid_usage *usage,
unsigned long **bit, int *max)
{
/* tell hid-input to skip setup of these event types */
if (usage->type == EV_KEY || usage->type == EV_ABS)
clear_bit(usage->code, *bit);
return 0;
set_bit(usage->type, hi->input->evbit);
return -1;
}
/*