diff options
| -rw-r--r-- | drivers/input/mouse/bcm5974.c | 70 |
1 files changed, 54 insertions, 16 deletions
diff --git a/drivers/input/mouse/bcm5974.c b/drivers/input/mouse/bcm5974.c index ae78bb833f62..8568211c5564 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); |