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-rw-r--r--drivers/input/mouse/bcm5974.c70
1 files changed, 54 insertions, 16 deletions
diff --git a/drivers/input/mouse/bcm5974.c b/drivers/input/mouse/bcm5974.c
index ae78bb833f6..8568211c556 100644
--- a/drivers/input/mouse/bcm5974.c
+++ b/drivers/input/mouse/bcm5974.c
@@ -105,7 +105,7 @@ struct tp_header {
/* trackpad finger structure */
struct tp_finger {
- __le16 origin; /* left/right origin? */
+ __le16 origin; /* zero when switching track finger */
__le16 abs_x; /* absolute x coodinate */
__le16 abs_y; /* absolute y coodinate */
__le16 rel_x; /* relative x coodinate */
@@ -159,6 +159,7 @@ struct bcm5974 {
struct bt_data *bt_data; /* button transferred data */
struct urb *tp_urb; /* trackpad usb request block */
struct tp_data *tp_data; /* trackpad transferred data */
+ int fingers; /* number of fingers on trackpad */
};
/* logical dimensions */
@@ -172,6 +173,10 @@ struct bcm5974 {
#define SN_WIDTH 100 /* width signal-to-noise ratio */
#define SN_COORD 250 /* coordinate signal-to-noise ratio */
+/* pressure thresholds */
+#define PRESSURE_LOW (2 * DIM_PRESSURE / SN_PRESSURE)
+#define PRESSURE_HIGH (3 * PRESSURE_LOW)
+
/* device constants */
static const struct bcm5974_config bcm5974_config_table[] = {
{
@@ -273,32 +278,65 @@ static int report_tp_state(struct bcm5974 *dev, int size)
const struct tp_finger *f = dev->tp_data->finger;
struct input_dev *input = dev->input;
const int fingers = (size - 26) / 28;
- int p = 0, w, x, y, n = 0;
+ int raw_p, raw_w, raw_x, raw_y;
+ int ptest = 0, origin = 0, nmin = 0, nmax = 0;
+ int abs_p = 0, abs_w = 0, abs_x = 0, abs_y = 0;
if (size < 26 || (size - 26) % 28 != 0)
return -EIO;
+ /* always track the first finger; when detached, start over */
if (fingers) {
- p = raw2int(f->force_major);
- w = raw2int(f->size_major);
- x = raw2int(f->abs_x);
- y = raw2int(f->abs_y);
- n = p > 0 ? fingers : 0;
+ raw_p = raw2int(f->force_major);
+ raw_w = raw2int(f->size_major);
+ raw_x = raw2int(f->abs_x);
+ raw_y = raw2int(f->abs_y);
dprintk(9,
- "bcm5974: p: %+05d w: %+05d x: %+05d y: %+05d n: %d\n",
- p, w, x, y, n);
+ "bcm5974: raw: p: %+05d w: %+05d x: %+05d y: %+05d\n",
+ raw_p, raw_w, raw_x, raw_y);
+
+ ptest = int2bound(&c->p, raw_p);
+ origin = raw2int(f->origin);
+ }
- input_report_abs(input, ABS_TOOL_WIDTH, int2bound(&c->w, w));
- input_report_abs(input, ABS_X, int2bound(&c->x, x - c->x.devmin));
- input_report_abs(input, ABS_Y, int2bound(&c->y, c->y.devmax - y));
+ /* while tracking finger still valid, count all fingers */
+ if (ptest > PRESSURE_LOW && origin) {
+ abs_p = ptest;
+ abs_w = int2bound(&c->w, raw_w);
+ abs_x = int2bound(&c->x, raw_x - c->x.devmin);
+ abs_y = int2bound(&c->y, c->y.devmax - raw_y);
+ for (; f != dev->tp_data->finger + fingers; f++) {
+ ptest = int2bound(&c->p, raw2int(f->force_major));
+ if (ptest > PRESSURE_LOW)
+ nmax++;
+ if (ptest > PRESSURE_HIGH)
+ nmin++;
+ }
}
- input_report_abs(input, ABS_PRESSURE, int2bound(&c->p, p));
+ if (dev->fingers < nmin)
+ dev->fingers = nmin;
+ if (dev->fingers > nmax)
+ dev->fingers = nmax;
+
+ input_report_key(input, BTN_TOOL_FINGER, dev->fingers == 1);
+ input_report_key(input, BTN_TOOL_DOUBLETAP, dev->fingers == 2);
+ input_report_key(input, BTN_TOOL_TRIPLETAP, dev->fingers > 2);
- input_report_key(input, BTN_TOOL_FINGER, n == 1);
- input_report_key(input, BTN_TOOL_DOUBLETAP, n == 2);
- input_report_key(input, BTN_TOOL_TRIPLETAP, n > 2);
+ input_report_abs(input, ABS_PRESSURE, abs_p);
+ input_report_abs(input, ABS_TOOL_WIDTH, abs_w);
+
+ if (abs_p) {
+ input_report_abs(input, ABS_X, abs_x);
+ input_report_abs(input, ABS_Y, abs_y);
+
+ dprintk(8,
+ "bcm5974: abs: p: %+05d w: %+05d x: %+05d y: %+05d "
+ "nmin: %d nmax: %d n: %d\n",
+ abs_p, abs_w, abs_x, abs_y, nmin, nmax, dev->fingers);
+
+ }
input_sync(input);