scuti/hanvon-linux
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absolute wheel implementation

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ond 2011-03-10 20:40:16 +01:00
parent 87403d3f9c
commit 535ea39e39
1 changed files with 19 additions and 3 deletions
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22
hanvon.c
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@ -20,6 +20,8 @@ MODULE_LICENSE(DRIVER_LICENSE);
#define B1 BTN_TOOL_FINGER
#define B2 BTN_TOOL_PENCIL
#define B3 BTN_TOOL_AIRBRUSH
#define TOTAL_WHEEL_ABS 0x40
#define WHEEL_THRESHOLD 10
struct hanvon {
unsigned char *data;
@ -32,7 +34,7 @@ struct hanvon {
unsigned b1:1;
unsigned b2:1;
unsigned b3:1;
int b_wheel;
int wheel_pos, old_wheel_pos;
int pressure;
char phys[32];
};
@ -70,9 +72,21 @@ static void hanvon_irq(struct urb *urb)
input_report_key(dev, B2, hanvon->b2);
input_report_key(dev, B3, hanvon->b3);
} else {
hanvon->b_wheel = data[2]; // FIXME: calculate position 0 .. 255
if(data[2] <= 0x3f) { // slider area active
int diff = hanvon->old_wheel_pos - data[2];
if(abs(diff) < WHEEL_THRESHOLD) {
hanvon->wheel_pos += diff;
input_report_key(dev, BTN_WHEEL, hanvon->b_wheel);
if(hanvon->wheel_pos < -TOTAL_WHEEL_ABS)
hanvon->wheel_pos += TOTAL_WHEEL_ABS;
else if(hanvon->wheel_pos > TOTAL_WHEEL_ABS)
hanvon->wheel_pos -= TOTAL_WHEEL_ABS;
input_report_key(dev, ABS_WHEEL, hanvon->wheel_pos);
}
hanvon->old_wheel_pos = data[2];
}
}
break;
@ -120,6 +134,7 @@ static int hanvon_open(struct input_dev *dev)
{
struct hanvon *hanvon = input_get_drvdata(dev);
hanvon->old_wheel_pos = -TOTAL_WHEEL_ABS-1;
hanvon->irq->dev = hanvon->usbdev;
if (usb_submit_urb(hanvon->irq, GFP_KERNEL))
return -EIO;
@ -182,6 +197,7 @@ static int hanvon_probe(struct usb_interface *intf, const struct usb_device_id *
input_set_abs_params(input_dev, ABS_X, 0, 0x27de, 4, 0);
input_set_abs_params(input_dev, ABS_Y, 0, 0x1cfe, 4, 0);
input_set_abs_params(input_dev, ABS_PRESSURE, 0, 0xffffffff, 4, 0);
input_set_abs_params(input_dev, ABS_WHEEL, 0, TOTAL_WHEEL_ABS, 4, 0);
endpoint = &intf->cur_altsetting->endpoint[0].desc;