From 47c78e891323513e9909729b44033e2c6649e2b7 Mon Sep 17 00:00:00 2001 From: Henrik Rydberg Date: Sat, 27 Nov 2010 09:16:48 +0100 Subject: input: mt: Break out slots handling In preparation for common code to handle a larger set of MT slots devices, move the slots handling over to a separate file. Signed-off-by: Henrik Rydberg --- include/linux/input.h | 16 ---------------- 1 file changed, 16 deletions(-) (limited to 'include/linux/input.h') diff --git a/include/linux/input.h b/include/linux/input.h index 51af441f3a21..99e2a52c0509 100644 --- a/include/linux/input.h +++ b/include/linux/input.h @@ -1082,14 +1082,6 @@ struct ff_effect { #include #include -/** - * struct input_mt_slot - represents the state of an input MT slot - * @abs: holds current values of ABS_MT axes for this slot - */ -struct input_mt_slot { - int abs[ABS_MT_LAST - ABS_MT_FIRST + 1]; -}; - /** * struct input_dev - represents an input device * @name: name of the device @@ -1461,11 +1453,6 @@ static inline void input_mt_sync(struct input_dev *dev) input_event(dev, EV_SYN, SYN_MT_REPORT, 0); } -static inline void input_mt_slot(struct input_dev *dev, int slot) -{ - input_event(dev, EV_ABS, ABS_MT_SLOT, slot); -} - void input_set_capability(struct input_dev *dev, unsigned int type, unsigned int code); /** @@ -1578,8 +1565,5 @@ int input_ff_erase(struct input_dev *dev, int effect_id, struct file *file); int input_ff_create_memless(struct input_dev *dev, void *data, int (*play_effect)(struct input_dev *, void *, struct ff_effect *)); -int input_mt_create_slots(struct input_dev *dev, unsigned int num_slots); -void input_mt_destroy_slots(struct input_dev *dev); - #endif #endif -- cgit v1.2.3 From c5f4dec1ceb6ab773bbbefbe64a7c990c7d6b17f Mon Sep 17 00:00:00 2001 From: Henrik Rydberg Date: Wed, 15 Dec 2010 13:50:34 +0100 Subject: input: mt: Move tracking and pointer emulation to input-mt The drivers using the type B protocol all report tracking information the same way. The contact id is semantically equivalent to ABS_MT_SLOT, and the handling of ABS_MT_TRACKING_ID only complicates the driver. The situation can be improved upon by providing a common pointer emulation code, thereby removing the need for the tracking id in the driver. This patch moves all tracking event handling over to the input core, simplifying both the existing drivers and the ones currently in preparation. Acked-by: Ping Cheng Acked-by: Jiri Kosina Signed-off-by: Henrik Rydberg --- drivers/hid/hid-3m-pct.c | 30 +-------- drivers/input/input-mt.c | 115 ++++++++++++++++++++++++++++++-- drivers/input/tablet/wacom_wac.c | 23 ++----- drivers/input/tablet/wacom_wac.h | 4 -- drivers/input/touchscreen/wacom_w8001.c | 21 ++---- include/linux/input.h | 3 + include/linux/input/mt.h | 13 ++++ 7 files changed, 138 insertions(+), 71 deletions(-) (limited to 'include/linux/input.h') diff --git a/drivers/hid/hid-3m-pct.c b/drivers/hid/hid-3m-pct.c index ea475964d05a..4fb7c7528d16 100644 --- a/drivers/hid/hid-3m-pct.c +++ b/drivers/hid/hid-3m-pct.c @@ -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"); 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, MT_TOOL_FINGER, 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, true); input_sync(input); } diff --git a/drivers/input/input-mt.c b/drivers/input/input-mt.c index f400e47092c4..c48c81f0308d 100644 --- a/drivers/input/input-mt.c +++ b/drivers/input/input-mt.c @@ -11,17 +11,18 @@ #include #include +#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 +63,108 @@ 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_slot_state() - report contact state + * @dev: input device with allocated MT slots + * @tool_type: the tool type to use in this slot + * @active: true if contact is active, false otherwise + * + * Reports a contact via ABS_MT_TRACKING_ID, and optionally + * ABS_MT_TOOL_TYPE. If active is true and the slot is currently + * inactive, or if the tool type is changed, a new tracking id is + * assigned to the slot. The tool type is only reported if the + * corresponding absbit field is set. + */ +void input_mt_report_slot_state(struct input_dev *dev, + unsigned int tool_type, bool active) +{ + struct input_mt_slot *mt; + int id; + + if (!dev->mt || !active) { + input_event(dev, EV_ABS, ABS_MT_TRACKING_ID, -1); + return; + } + + mt = &dev->mt[dev->slot]; + id = input_mt_get_value(mt, ABS_MT_TRACKING_ID); + if (id < 0 || input_mt_get_value(mt, ABS_MT_TOOL_TYPE) != tool_type) + id = input_mt_new_trkid(dev); + + input_event(dev, EV_ABS, ABS_MT_TRACKING_ID, id); + input_event(dev, EV_ABS, ABS_MT_TOOL_TYPE, tool_type); +} +EXPORT_SYMBOL(input_mt_report_slot_state); + +/** + * input_mt_report_finger_count() - report contact count + * @dev: input device with allocated MT slots + * @count: the number of contacts + * + * Reports the contact count via BTN_TOOL_FINGER, BTN_TOOL_DOUBLETAP, + * BTN_TOOL_TRIPLETAP and BTN_TOOL_QUADTAP. + * + * The input core ensures only the KEY events already setup for + * this device will produce output. + */ +void input_mt_report_finger_count(struct input_dev *dev, int count) +{ + 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); +} +EXPORT_SYMBOL(input_mt_report_finger_count); + +/** + * input_mt_report_pointer_emulation() - common pointer emulation + * @dev: input device with allocated MT slots + * @use_count: report number of active contacts as finger count + * + * Performs legacy pointer emulation via BTN_TOUCH, ABS_X, ABS_Y and + * ABS_PRESSURE. Touchpad finger count is emulated if use_count is true. + * + * 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, bool use_count) +{ + 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); + if (use_count) + input_mt_report_finger_count(dev, count); + + 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); diff --git a/drivers/input/tablet/wacom_wac.c b/drivers/input/tablet/wacom_wac.c index f26e2238f6ca..0b0525486711 100644 --- a/drivers/input/tablet/wacom_wac.c +++ b/drivers/input/tablet/wacom_wac.c @@ -863,19 +863,21 @@ 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++) { int p = data[9 * i + 2]; + bool touch = p && !wacom->shared->stylus_in_proximity; + input_mt_slot(input, i); + input_mt_report_slot_state(input, MT_TOOL_FINGER, touch); /* * Touch events need to be disabled while stylus is * in proximity because user's hand is resting on touchpad * and sending unwanted events. User expects tablet buttons * to continue working though. */ - if (p && !wacom->shared->stylus_in_proximity) { + if (touch) { int x = get_unaligned_be16(&data[9 * i + 3]) & 0x7ff; int y = get_unaligned_be16(&data[9 * i + 5]) & 0x7ff; if (features->quirks & WACOM_QUIRK_BBTOUCH_LOWRES) { @@ -885,23 +887,10 @@ 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; - } else { - wacom->id[i] = -1; } - 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, true); 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); diff --git a/drivers/input/tablet/wacom_wac.h b/drivers/input/tablet/wacom_wac.h index 00ca01541d89..b1310ec9720c 100644 --- a/drivers/input/tablet/wacom_wac.h +++ b/drivers/input/tablet/wacom_wac.h @@ -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; diff --git a/drivers/input/touchscreen/wacom_w8001.c b/drivers/input/touchscreen/wacom_w8001.c index 4a2e8cf4c8ef..2a0bec12d12a 100644 --- a/drivers/input/touchscreen/wacom_w8001.c +++ b/drivers/input/touchscreen/wacom_w8001.c @@ -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) @@ -116,28 +113,23 @@ 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; for (i = 0; i < 2; i++) { - input_mt_slot(dev, i); + bool touch = data[0] & (1 << i); - if (data[0] & (1 << i)) { + input_mt_slot(dev, i); + input_mt_report_slot_state(dev, MT_TOOL_FINGER, touch); + if (touch) { int x = (data[6 * i + 1] << 7) | (data[6 * i + 2]); int y = (data[6 * i + 3] << 7) | (data[6 * i + 4]); /* data[5,6] and [11,12] is finger capacity */ 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; - } else { - w8001->trkid[i] = -1; } - input_report_abs(dev, ABS_MT_TRACKING_ID, w8001->trkid[i]); } input_sync(dev); @@ -319,14 +311,12 @@ 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, 0, touch.y, 0, 0); input_set_abs_params(dev, ABS_MT_TOOL_TYPE, - 0, 0, 0, 0); + 0, MT_TOOL_MAX, 0, 0); break; } } @@ -372,7 +362,6 @@ 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); diff --git a/include/linux/input.h b/include/linux/input.h index 99e2a52c0509..6de145df4c1c 100644 --- a/include/linux/input.h +++ b/include/linux/input.h @@ -848,6 +848,7 @@ struct input_keymap_entry { */ #define MT_TOOL_FINGER 0 #define MT_TOOL_PEN 1 +#define MT_TOOL_MAX 1 /* * Values describing the status of a force-feedback effect @@ -1122,6 +1123,7 @@ struct ff_effect { * of tracked contacts * @mtsize: number of MT slots the device uses * @slot: MT slot currently being transmitted + * @trkid: stores MT tracking ID for the current contact * @absinfo: array of &struct absinfo elements holding information * about absolute axes (current value, min, max, flat, fuzz, * resolution) @@ -1206,6 +1208,7 @@ struct input_dev { struct input_mt_slot *mt; int mtsize; int slot; + int trkid; struct input_absinfo *absinfo; diff --git a/include/linux/input/mt.h b/include/linux/input/mt.h index d7f6518e3222..b3ac06a4435d 100644 --- a/include/linux/input/mt.h +++ b/include/linux/input/mt.h @@ -13,6 +13,8 @@ #include +#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 +38,20 @@ 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, + unsigned int tool_type, bool active); + +void input_mt_report_finger_count(struct input_dev *dev, int count); +void input_mt_report_pointer_emulation(struct input_dev *dev, bool use_count); + #endif -- cgit v1.2.3 From e42a98b520bb22535687ead3120e80edc268279a Mon Sep 17 00:00:00 2001 From: Henrik Rydberg Date: Mon, 6 Dec 2010 10:05:43 +0100 Subject: input: mt: Add hovering distance axis Touch devices capable of hovering, i.e., fingers detected a distance from the surface, are not supported by the current input MT protocol. This patch adds ABS_MT_DISTANCE, which may be used to indicate the distance between the contact and the surface. Signed-off-by: Henrik Rydberg --- Documentation/input/multi-touch-protocol.txt | 9 ++++++++- include/linux/input.h | 3 ++- 2 files changed, 10 insertions(+), 2 deletions(-) (limited to 'include/linux/input.h') diff --git a/Documentation/input/multi-touch-protocol.txt b/Documentation/input/multi-touch-protocol.txt index bdcba154b83e..07215fa0c588 100644 --- a/Documentation/input/multi-touch-protocol.txt +++ b/Documentation/input/multi-touch-protocol.txt @@ -161,7 +161,8 @@ against the glass. The inner region will increase, and in general, the ratio ABS_MT_TOUCH_MAJOR / ABS_MT_WIDTH_MAJOR, which is always smaller than unity, is related to the contact pressure. For pressure-based devices, ABS_MT_PRESSURE may be used to provide the pressure on the contact area -instead. +instead. Devices capable of contact hovering can use ABS_MT_DISTANCE to +indicate the distance between the contact and the surface. In addition to the MAJOR parameters, the oval shape of the contact can be described by adding the MINOR parameters, such that MAJOR and MINOR are the @@ -213,6 +214,12 @@ The pressure, in arbitrary units, on the contact area. May be used instead of TOUCH and WIDTH for pressure-based devices or any device with a spatial signal intensity distribution. +ABS_MT_DISTANCE + +The distance, in surface units, between the contact and the surface. Zero +distance means the contact is touching the surface. A positive number means +the contact is hovering above the surface. + ABS_MT_ORIENTATION The orientation of the ellipse. The value should describe a signed quarter diff --git a/include/linux/input.h b/include/linux/input.h index 6de145df4c1c..b3a1e02080c0 100644 --- a/include/linux/input.h +++ b/include/linux/input.h @@ -733,11 +733,12 @@ struct input_keymap_entry { #define ABS_MT_BLOB_ID 0x38 /* Group a set of packets as a blob */ #define ABS_MT_TRACKING_ID 0x39 /* Unique ID of initiated contact */ #define ABS_MT_PRESSURE 0x3a /* Pressure on contact area */ +#define ABS_MT_DISTANCE 0x3b /* Contact hover distance */ #ifdef __KERNEL__ /* Implementation details, userspace should not care about these */ #define ABS_MT_FIRST ABS_MT_TOUCH_MAJOR -#define ABS_MT_LAST ABS_MT_PRESSURE +#define ABS_MT_LAST ABS_MT_DISTANCE #endif #define ABS_MAX 0x3f -- cgit v1.2.3