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authorHenrik Rydberg <rydberg@euromail.se>2012-09-15 16:40:04 +0200
committerHenrik Rydberg <rydberg@euromail.se>2012-09-19 19:50:22 +0200
commit51c80b74002f86477d691ed7c8ac479dcfa6271c (patch)
treec318aa1bd6312c7338c9f560f79eb397bd8db6cc /drivers/input
parent0e7269669d4cd14a49b4e5c708b8be0ba11504f7 (diff)
Input: bcm5974 - Convert to MT-B
Use of the in-kernel tracking code to convert the driver to MT-B. With ten fingers on the pad, the in-kernel tracking adds approximately 25 us to the maximum irqsoff latency. Under normal workloads, however, the tracking has no measurable effect. Tested-by: Benjamin Tissoires <benjamin.tissoires@enac.fr> Acked-by: Dmitry Torokhov <dmitry.torokhov@gmail.com> Signed-off-by: Henrik Rydberg <rydberg@euromail.se>
Diffstat (limited to 'drivers/input')
-rw-r--r--drivers/input/mouse/bcm5974.c73
1 files changed, 28 insertions, 45 deletions
diff --git a/drivers/input/mouse/bcm5974.c b/drivers/input/mouse/bcm5974.c
index e8cfb386418..3a78f235fa3 100644
--- a/drivers/input/mouse/bcm5974.c
+++ b/drivers/input/mouse/bcm5974.c
@@ -40,6 +40,7 @@
#include <linux/usb/input.h>
#include <linux/hid.h>
#include <linux/mutex.h>
+#include <linux/input/mt.h>
#define USB_VENDOR_ID_APPLE 0x05ac
@@ -235,11 +236,14 @@ struct bcm5974 {
struct bt_data *bt_data; /* button transferred data */
struct urb *tp_urb; /* trackpad usb request block */
u8 *tp_data; /* trackpad transferred data */
+ const struct tp_finger *index[MAX_FINGERS]; /* finger index data */
+ struct input_mt_pos pos[MAX_FINGERS]; /* position array */
+ int slots[MAX_FINGERS]; /* slot assignments */
};
/* logical signal quality */
#define SN_PRESSURE 45 /* pressure signal-to-noise ratio */
-#define SN_WIDTH 100 /* width signal-to-noise ratio */
+#define SN_WIDTH 25 /* width signal-to-noise ratio */
#define SN_COORD 250 /* coordinate signal-to-noise ratio */
#define SN_ORIENT 10 /* orientation signal-to-noise ratio */
@@ -414,10 +418,6 @@ static void setup_events_to_report(struct input_dev *input_dev,
input_set_abs_params(input_dev, ABS_PRESSURE, 0, 256, 5, 0);
input_set_abs_params(input_dev, ABS_TOOL_WIDTH, 0, 16, 0, 0);
- /* pointer emulation */
- set_abs(input_dev, ABS_X, &cfg->x);
- set_abs(input_dev, ABS_Y, &cfg->y);
-
/* finger touch area */
set_abs(input_dev, ABS_MT_TOUCH_MAJOR, &cfg->w);
set_abs(input_dev, ABS_MT_TOUCH_MINOR, &cfg->w);
@@ -431,18 +431,13 @@ static void setup_events_to_report(struct input_dev *input_dev,
set_abs(input_dev, ABS_MT_POSITION_Y, &cfg->y);
__set_bit(EV_KEY, input_dev->evbit);
- __set_bit(BTN_TOUCH, input_dev->keybit);
- __set_bit(BTN_TOOL_FINGER, input_dev->keybit);
- __set_bit(BTN_TOOL_DOUBLETAP, input_dev->keybit);
- __set_bit(BTN_TOOL_TRIPLETAP, input_dev->keybit);
- __set_bit(BTN_TOOL_QUADTAP, input_dev->keybit);
__set_bit(BTN_LEFT, input_dev->keybit);
- __set_bit(INPUT_PROP_POINTER, input_dev->propbit);
if (cfg->caps & HAS_INTEGRATED_BUTTON)
__set_bit(INPUT_PROP_BUTTONPAD, input_dev->propbit);
- input_set_events_per_packet(input_dev, 60);
+ input_mt_init_slots(input_dev, MAX_FINGERS,
+ INPUT_MT_POINTER | INPUT_MT_DROP_UNUSED | INPUT_MT_TRACK);
}
/* report button data as logical button state */
@@ -462,10 +457,13 @@ static int report_bt_state(struct bcm5974 *dev, int size)
return 0;
}
-static void report_finger_data(struct input_dev *input,
- const struct bcm5974_config *cfg,
+static void report_finger_data(struct input_dev *input, int slot,
+ const struct input_mt_pos *pos,
const struct tp_finger *f)
{
+ input_mt_slot(input, slot);
+ input_mt_report_slot_state(input, MT_TOOL_FINGER, true);
+
input_report_abs(input, ABS_MT_TOUCH_MAJOR,
raw2int(f->touch_major) << 1);
input_report_abs(input, ABS_MT_TOUCH_MINOR,
@@ -476,10 +474,8 @@ static void report_finger_data(struct input_dev *input,
raw2int(f->tool_minor) << 1);
input_report_abs(input, ABS_MT_ORIENTATION,
MAX_FINGER_ORIENTATION - raw2int(f->orientation));
- input_report_abs(input, ABS_MT_POSITION_X, raw2int(f->abs_x));
- input_report_abs(input, ABS_MT_POSITION_Y,
- cfg->y.min + cfg->y.max - raw2int(f->abs_y));
- input_mt_sync(input);
+ input_report_abs(input, ABS_MT_POSITION_X, pos->x);
+ input_report_abs(input, ABS_MT_POSITION_Y, pos->y);
}
static void report_synaptics_data(struct input_dev *input,
@@ -507,8 +503,7 @@ static int report_tp_state(struct bcm5974 *dev, int size)
const struct bcm5974_config *c = &dev->cfg;
const struct tp_finger *f;
struct input_dev *input = dev->input;
- int raw_n, i;
- int abs_x = 0, abs_y = 0, n = 0;
+ int raw_n, i, n = 0;
if (size < c->tp_offset || (size - c->tp_offset) % SIZEOF_FINGER != 0)
return -EIO;
@@ -517,35 +512,23 @@ static int report_tp_state(struct bcm5974 *dev, int size)
f = (const struct tp_finger *)(dev->tp_data + c->tp_offset);
raw_n = (size - c->tp_offset) / SIZEOF_FINGER;
- /* always track the first finger; when detached, start over */
- if (raw_n) {
-
- /* report raw trackpad data */
- for (i = 0; i < raw_n; i++)
- report_finger_data(input, c, &f[i]);
-
- /* while tracking finger still valid, count all fingers */
- if (raw2int(f->touch_major) > 0 && raw2int(f->origin)) {
- abs_x = raw2int(f->abs_x);
- abs_y = c->y.min + c->y.max - raw2int(f->abs_y);
- for (i = 0; i < raw_n; i++)
- if (raw2int(f[i].touch_major) > 0)
- n++;
- }
+ for (i = 0; i < raw_n; i++) {
+ if (raw2int(f[i].touch_major) == 0)
+ continue;
+ dev->pos[n].x = raw2int(f[i].abs_x);
+ dev->pos[n].y = c->y.min + c->y.max - raw2int(f[i].abs_y);
+ dev->index[n++] = &f[i];
}
- input_report_key(input, BTN_TOUCH, n > 0);
- 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 == 3);
- input_report_key(input, BTN_TOOL_QUADTAP, n > 3);
+ input_mt_assign_slots(input, dev->slots, dev->pos, n);
- report_synaptics_data(input, c, f, raw_n);
+ for (i = 0; i < n; i++)
+ report_finger_data(input, dev->slots[i],
+ &dev->pos[i], dev->index[i]);
- if (n > 0) {
- input_report_abs(input, ABS_X, abs_x);
- input_report_abs(input, ABS_Y, abs_y);
- }
+ input_mt_sync_frame(input);
+
+ report_synaptics_data(input, c, f, raw_n);
/* type 2 reports button events via ibt only */
if (c->tp_type == TYPE2) {