@@ -28,7 +28,6 @@ MODULE_LICENSE("GPL");
#include "hid-ids.h"
#define MAX_SLOTS 60
-#define MAX_TRKID USHRT_MAX
/* estimated signal-to-noise ratios */
#define SN_MOVE 2048
@@ -36,14 +35,11 @@ MODULE_LICENSE("GPL");etter t
struct mmm_finger {
__s32 x, y, w, h;
- __u16 id;
- bool prev_touch;
bool touch, valid;
};
struct mmm_data {
struct mmm_finger f[MAX_SLOTS];
- __u16 id;
__u8 curid;
__u8 nexp, nreal;
bool touch, valid;
@@ -117,11 +113,6 @@ static int mmm_input_mapping(struct hid_device *hdev, struct hid_input *hi,
0, 1, 0, 0);
return 1;
case HID_DG_CONTACTID:
- field->logical_maximum = MAX_TRKID;
- hid_map_usage(hi, usage, bit, max,
- EV_ABS, ABS_MT_TRACKING_ID);
- input_set_abs_params(hi->input, ABS_MT_TRACKING_ID,
- 0, MAX_TRKID, 0, 0);
input_mt_init_slots(hi->input, MAX_SLOTS);
return 1;
}
@@ -152,7 +143,6 @@ static int mmm_input_mapped(struct hid_device *hdev, struct hid_input *hi,
*/
static void mmm_filter_event(struct mmm_data *md, struct input_dev *input)
{
- struct mmm_finger *oldest = 0;
int i;
for (i = 0; i < MAX_SLOTS; ++i) {
struct mmm_finger *f = &md->f[i];
@@ -161,6 +151,7 @@ static void mmm_filter_event(struct mmm_data *md, struct input_dev *input)
continue;
}
input_mt_slot(input, i);
+ input_mt_report_slot_state(input, f->touch);
if (f->touch) {
/* this finger is on the screen */
int wide = (f->w > f->h);
@@ -168,33 +159,16 @@ static void mmm_filter_event(struct mmm_data *md, struct input_dev *input)
int major = max(f->w, f->h) >> 1;
int minor = min(f->w, f->h) >> 1;
- if (!f->prev_touch)
- f->id = md->id++;
- input_event(input, EV_ABS, ABS_MT_TRACKING_ID, f->id);
input_event(input, EV_ABS, ABS_MT_POSITION_X, f->x);
input_event(input, EV_ABS, ABS_MT_POSITION_Y, f->y);
input_event(input, EV_ABS, ABS_MT_ORIENTATION, wide);
input_event(input, EV_ABS, ABS_MT_TOUCH_MAJOR, major);
input_event(input, EV_ABS, ABS_MT_TOUCH_MINOR, minor);
- /* touchscreen emulation: pick the oldest contact */
- if (!oldest || ((f->id - oldest->id) & (SHRT_MAX + 1)))
- oldest = f;
- } else {
- /* this finger took off the screen */
- input_event(input, EV_ABS, ABS_MT_TRACKING_ID, -1);
}
- f->prev_touch = f->touch;
f->valid = 0;
}
- /* touchscreen emulation */
- if (oldest) {
- input_event(input, EV_KEY, BTN_TOUCH, 1);
- input_event(input, EV_ABS, ABS_X, oldest->x);
- input_event(input, EV_ABS, ABS_Y, oldest->y);
- } else {
- input_event(input, EV_KEY, BTN_TOUCH, 0);
- }
+ input_mt_report_pointer_emulation(input);
input_sync(input);
}
@@ -11,17 +11,18 @@
#include <linux/input-mt.h>
#include <linux/slab.h>
+#define TRKID_SGN ((TRKID_MAX + 1) >> 1)
+
/**
* input_mt_init_slots() - initialize MT input slots
* @dev: input device supporting MT events and finger tracking
* @num_slots: number of slots used by the device
*
* This function allocates all necessary memory for MT slot handling
- * in the input device, adds ABS_MT_SLOT to the device capabilities
- * and sets up appropriate event buffers. All slots are initially
- * marked as unused by setting ABS_MT_TRACKING_ID to -1. May be called
- * repeatedly. Returns -EINVAL if attempting to reinitialize with a
- * different number of slots.
+ * in the input device, prepares the ABS_MT_SLOT and
+ * ABS_MT_TRACKING_ID events for use and sets up appropriate buffers.
+ * May be called repeatedly. Returns -EINVAL if attempting to
+ * reinitialize with a different number of slots.
*/
int input_mt_init_slots(struct input_dev *dev, unsigned int num_slots)
{
@@ -38,6 +39,7 @@ int input_mt_init_slots(struct input_dev *dev, unsigned int num_slots)
dev->mtsize = num_slots;
input_set_abs_params(dev, ABS_MT_SLOT, 0, num_slots - 1, 0, 0);
+ input_set_abs_params(dev, ABS_MT_TRACKING_ID, 0, TRKID_MAX, 0, 0);
input_set_events_per_packet(dev, 6 * num_slots);
/* Mark slots as 'unused' */
@@ -61,5 +63,84 @@ void input_mt_destroy_slots(struct input_dev *dev)
dev->mt = NULL;
dev->mtsize = 0;
dev->slot = 0;
+ dev->trkid = 0;
}
EXPORT_SYMBOL(input_mt_destroy_slots);
+
+/**
+ * input_mt_report_state() - report contact state
+ * @dev: input device with allocated MT slots
+ * @active: true if contact is active, false otherwise
+ *
+ * Reports an active touch via ABS_MT_TRACKING_ID. If active is
+ * true and the slot is currently inactive, a new tracking id is
+ * assigned to the slot.
+ */
+void input_mt_report_slot_state(struct input_dev *dev, bool active)
+{
+ struct input_mt_slot *mt = dev->mt;
+ int id;
+
+ if (!mt || !active) {
+ input_event(dev, EV_ABS, ABS_MT_TRACKING_ID, -1);
+ return;
+ }
+
+ id = input_mt_get_value(&mt[dev->slot], ABS_MT_TRACKING_ID);
+ if (id < 0)
+ id = input_mt_new_trkid(dev);
+ input_event(dev, EV_ABS, ABS_MT_TRACKING_ID, id);
+}
+EXPORT_SYMBOL(input_mt_report_slot_state);
+
+/**
+ * input_mt_report_pointer_emulation() - common pointer emulation
+ * @dev: input device with allocated MT slots
+ *
+ * Performs legacy pointer emulation via BTN_TOUCH, ABS_X, ABS_Y and
+ * ABS_PRESSURE. Touchpad finger count is emulated using
+ * BTN_TOOL_FINGER, BTN_TOOL_DOUBLETAP, BTN_TOOL_TRIPLETAP and
+ * BTN_TOOL_QUADTAP.
+ *
+ * The input core ensures only the KEY and ABS axes already setup for
+ * this device will produce output.
+ */
+void input_mt_report_pointer_emulation(struct input_dev *dev)
+{
+ struct input_mt_slot *oldest = 0;
+ int oldid = dev->trkid;
+ int count = 0;
+ int i;
+
+ for (i = 0; i < dev->mtsize; ++i) {
+ struct input_mt_slot *ps = &dev->mt[i];
+ int id = input_mt_get_value(ps, ABS_MT_TRACKING_ID);
+
+ if (id < 0)
+ continue;
+ if ((id - oldid) & TRKID_SGN) {
+ oldest = ps;
+ oldid = id;
+ }
+ count++;
+ }
+
+ input_event(dev, EV_KEY, BTN_TOUCH, count > 0);
+ input_event(dev, EV_KEY, BTN_TOOL_FINGER, count == 1);
+ input_event(dev, EV_KEY, BTN_TOOL_DOUBLETAP, count == 2);
+ input_event(dev, EV_KEY, BTN_TOOL_TRIPLETAP, count == 3);
+ input_event(dev, EV_KEY, BTN_TOOL_QUADTAP, count == 4);
+
+ if (oldest) {
+ int x = input_mt_get_value(oldest, ABS_MT_POSITION_X);
+ int y = input_mt_get_value(oldest, ABS_MT_POSITION_Y);
+ int p = input_mt_get_value(oldest, ABS_MT_PRESSURE);
+
+ input_event(dev, EV_ABS, ABS_X, x);
+ input_event(dev, EV_ABS, ABS_Y, y);
+ input_event(dev, EV_ABS, ABS_PRESSURE, p);
+ } else {
+ input_event(dev, EV_ABS, ABS_PRESSURE, 0);
+ }
+}
+EXPORT_SYMBOL(input_mt_report_pointer_emulation);
@@ -863,7 +863,6 @@ static int wacom_bpt_touch(struct wacom_wac *wacom)
struct wacom_features *features = &wacom->features;
struct input_dev *input = wacom->input;
unsigned char *data = wacom->data;
- int sp = 0, sx = 0, sy = 0, count = 0;
int i;
for (i = 0; i < 2; i++) {
@@ -885,23 +884,13 @@ static int wacom_bpt_touch(struct wacom_wac *wacom)
input_report_abs(input, ABS_MT_PRESSURE, p);
input_report_abs(input, ABS_MT_POSITION_X, x);
input_report_abs(input, ABS_MT_POSITION_Y, y);
- if (wacom->id[i] < 0)
- wacom->id[i] = wacom->trk_id++ & MAX_TRACKING_ID;
- if (!count++)
- sp = p, sx = x, sy = y;
+ input_mt_report_slot_state(input, true);
} else {
- wacom->id[i] = -1;
+ input_mt_report_slot_state(input, false);
}
- input_report_abs(input, ABS_MT_TRACKING_ID, wacom->id[i]);
}
- input_report_key(input, BTN_TOUCH, count > 0);
- input_report_key(input, BTN_TOOL_FINGER, count == 1);
- input_report_key(input, BTN_TOOL_DOUBLETAP, count == 2);
-
- input_report_abs(input, ABS_PRESSURE, sp);
- input_report_abs(input, ABS_X, sx);
- input_report_abs(input, ABS_Y, sy);
+ input_mt_report_pointer_emulation(input);
input_report_key(input, BTN_LEFT, (data[1] & 0x08) != 0);
input_report_key(input, BTN_FORWARD, (data[1] & 0x04) != 0);
@@ -1283,8 +1272,6 @@ void wacom_setup_input_capabilities(struct input_dev *input_dev,
input_set_abs_params(input_dev, ABS_MT_PRESSURE,
0, features->pressure_max,
features->pressure_fuzz, 0);
- input_set_abs_params(input_dev, ABS_MT_TRACKING_ID, 0,
- MAX_TRACKING_ID, 0, 0);
} else if (features->device_type == BTN_TOOL_PEN) {
__set_bit(BTN_TOOL_RUBBER, input_dev->keybit);
__set_bit(BTN_TOOL_PEN, input_dev->keybit);
@@ -42,9 +42,6 @@
#define WACOM_QUIRK_MULTI_INPUT 0x0001
#define WACOM_QUIRK_BBTOUCH_LOWRES 0x0002
-/* largest reported tracking id */
-#define MAX_TRACKING_ID 0xfff
-
enum {
PENPARTNER = 0,
GRAPHIRE,
@@ -100,7 +97,6 @@ struct wacom_wac {
int id[3];
__u32 serial[2];
int last_finger;
- int trk_id;
struct wacom_features features;
struct wacom_shared *shared;
struct input_dev *input;
@@ -48,8 +48,6 @@ MODULE_LICENSE("GPL");
#define W8001_PKTLEN_TPCCTL 11 /* control packet */
#define W8001_PKTLEN_TOUCH2FG 13
-#define MAX_TRACKING_ID 0xFF /* arbitrarily chosen */
-
struct w8001_coord {
u8 rdy;
u8 tsw;
@@ -87,7 +85,6 @@ struct w8001 {
char phys[32];
int type;
unsigned int pktlen;
- int trkid[2];
};
static void parse_data(u8 *data, struct w8001_coord *coord)
@@ -116,7 +113,6 @@ static void parse_data(u8 *data, struct w8001_coord *coord)
static void parse_touch(struct w8001 *w8001)
{
- static int trkid;
struct input_dev *dev = w8001->dev;
unsigned char *data = w8001->data;
int i;
@@ -132,12 +128,10 @@ static void parse_touch(struct w8001 *w8001)
input_report_abs(dev, ABS_MT_POSITION_X, x);
input_report_abs(dev, ABS_MT_POSITION_Y, y);
input_report_abs(dev, ABS_MT_TOOL_TYPE, MT_TOOL_FINGER);
- if (w8001->trkid[i] < 0)
- w8001->trkid[i] = trkid++ & MAX_TRACKING_ID;
+ input_mt_report_slot_state(dev, true);
} else {
- w8001->trkid[i] = -1;
+ input_mt_report_slot_state(dev, false);
}
- input_report_abs(dev, ABS_MT_TRACKING_ID, w8001->trkid[i]);
}
input_sync(dev);
@@ -319,8 +313,6 @@ static int w8001_setup(struct w8001 *w8001)
w8001->pktlen = W8001_PKTLEN_TOUCH2FG;
input_mt_init_slots(dev, 2);
- input_set_abs_params(dev, ABS_MT_TRACKING_ID,
- 0, MAX_TRACKING_ID, 0, 0);
input_set_abs_params(dev, ABS_MT_POSITION_X,
0, touch.x, 0, 0);
input_set_abs_params(dev, ABS_MT_POSITION_Y,
@@ -372,7 +364,6 @@ static int w8001_connect(struct serio *serio, struct serio_driver *drv)
w8001->serio = serio;
w8001->id = serio->id.id;
w8001->dev = input_dev;
- w8001->trkid[0] = w8001->trkid[1] = -1;
init_completion(&w8001->cmd_done);
snprintf(w8001->phys, sizeof(w8001->phys), "%s/input0", serio->phys);
@@ -13,6 +13,8 @@
#include <linux/input.h>
+#define TRKID_MAX 0xffff
+
/**
* struct input_mt_slot - represents the state of an input MT slot
* @abs: holds current values of ABS_MT axes for this slot
@@ -36,9 +38,18 @@ static inline int input_mt_get_value(const struct input_mt_slot *slot,
int input_mt_init_slots(struct input_dev *dev, unsigned int num_slots);
void input_mt_destroy_slots(struct input_dev *dev);
+static inline int input_mt_new_trkid(struct input_dev *dev)
+{
+ return dev->trkid++ & TRKID_MAX;
+}
+
static inline void input_mt_slot(struct input_dev *dev, int slot)
{
input_event(dev, EV_ABS, ABS_MT_SLOT, slot);
}
+void input_mt_report_slot_state(struct input_dev *dev, bool active);
+
+void input_mt_report_pointer_emulation(struct input_dev *dev);
+
#endif
@@ -1206,6 +1206,7 @@ struct input_dev {
struct input_mt_slot *mt;
int mtsize;
int slot;
+ int trkid;
struct input_absinfo *absinfo;