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HID: hid-multitouch: minor fixes based on additional review
* amended Kconfig (PixCir and Hanvon are the same panel but with different name) * insert field name in mt_class and retrieving it in mt_probe * add 2 quirks: MT_QUIRK_VALID_IS_INRANGE, MT_QUIRK_VALID_IS_CONFIDENCE, in order to find the field "valid" * inlined slot_is_contactid and slot_is_contact_number * cosmetics changes (tabs and comments) * do not send unnecessary properties once the touch is up Signed-off-by: Benjamin Tissoires <benjamin.tissoires@enac.fr> Acked-by: Henrik Rydberg <rydberg@euromail.se> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
This commit is contained in:
Benjamin Tissoires
Jiri Kosina
parent
c64f6f934c
commit
2d93666e70
@ -292,10 +292,16 @@ config HID_MULTITOUCH
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Generic support for HID multitouch panels.
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Say Y here if you have one of the following devices:
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- PixCir touchscreen
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- Cypress TrueTouch
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- Cypress TrueTouch panels
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- Hanvon dual touch panels
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- Pixcir dual touch panels
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- 'Sensing Win7-TwoFinger' panel by GeneralTouch
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If unsure, say N.
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To compile this driver as a module, choose M here: the
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module will be called hid-multitouch.
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config HID_NTRIG
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tristate "N-Trig touch screen"
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depends on USB_HID
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@ -34,6 +34,8 @@ MODULE_LICENSE("GPL");
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#define MT_QUIRK_SLOT_IS_CONTACTID (1 << 1)
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#define MT_QUIRK_CYPRESS (1 << 2)
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#define MT_QUIRK_SLOT_IS_CONTACTNUMBER (1 << 3)
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#define MT_QUIRK_VALID_IS_INRANGE (1 << 4)
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#define MT_QUIRK_VALID_IS_CONFIDENCE (1 << 5)
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struct mt_slot {
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__s32 x, y, p, w, h;
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@ -55,6 +57,7 @@ struct mt_device {
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};
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struct mt_class {
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__s32 name; /* MT_CLS */
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__s32 quirks;
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__s32 sn_move; /* Signal/noise ratio for move events */
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__s32 sn_pressure; /* Signal/noise ratio for pressure events */
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@ -62,26 +65,16 @@ struct mt_class {
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};
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/* classes of device behavior */
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#define MT_CLS_DEFAULT 0
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#define MT_CLS_DUAL1 1
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#define MT_CLS_DUAL2 2
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#define MT_CLS_CYPRESS 3
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#define MT_CLS_DEFAULT 1
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#define MT_CLS_DUAL1 2
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#define MT_CLS_DUAL2 3
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#define MT_CLS_CYPRESS 4
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/*
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* these device-dependent functions determine what slot corresponds
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* to a valid contact that was just read.
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*/
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static int slot_is_contactid(struct mt_device *td)
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{
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return td->curdata.contactid;
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}
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static int slot_is_contactnumber(struct mt_device *td)
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{
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return td->num_received;
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}
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static int cypress_compute_slot(struct mt_device *td)
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{
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if (td->curdata.contactid != 0 || td->num_received == 0)
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@ -103,17 +96,30 @@ static int find_slot_from_contactid(struct mt_device *td)
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!td->slots[i].touch_state)
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return i;
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}
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return -1;
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/* should not occurs. If this happens that means
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* that the device sent more touches that it says
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* in the report descriptor. It is ignored then. */
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return -1;
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}
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struct mt_class mt_classes[] = {
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{ 0, 0, 0, 10 }, /* MT_CLS_DEFAULT */
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{ MT_QUIRK_SLOT_IS_CONTACTID, 0, 0, 2 }, /* MT_CLS_DUAL1 */
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{ MT_QUIRK_SLOT_IS_CONTACTNUMBER, 0, 0, 10 }, /* MT_CLS_DUAL2 */
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{ MT_QUIRK_CYPRESS | MT_QUIRK_NOT_SEEN_MEANS_UP, 0, 0, 10 }, /* MT_CLS_CYPRESS */
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{ .name = MT_CLS_DEFAULT,
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.quirks = MT_QUIRK_VALID_IS_INRANGE,
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.maxcontacts = 10 },
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{ .name = MT_CLS_DUAL1,
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.quirks = MT_QUIRK_VALID_IS_INRANGE |
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MT_QUIRK_SLOT_IS_CONTACTID,
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.maxcontacts = 2 },
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{ .name = MT_CLS_DUAL2,
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.quirks = MT_QUIRK_VALID_IS_INRANGE |
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MT_QUIRK_SLOT_IS_CONTACTNUMBER,
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.maxcontacts = 2 },
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{ .name = MT_CLS_CYPRESS,
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.quirks = MT_QUIRK_NOT_SEEN_MEANS_UP |
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MT_QUIRK_CYPRESS,
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.maxcontacts = 10 },
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{ }
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};
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static void mt_feature_mapping(struct hid_device *hdev, struct hid_input *hi,
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@ -192,7 +198,7 @@ static int mt_input_mapping(struct hid_device *hdev, struct hid_input *hi,
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hid_map_usage(hi, usage, bit, max,
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EV_ABS, ABS_MT_TOUCH_MINOR);
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field->logical_maximum = 1;
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field->logical_minimum = 1;
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field->logical_minimum = 0;
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set_abs(hi->input, ABS_MT_ORIENTATION, field, 0);
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td->last_slot_field = usage->hid;
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return 1;
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@ -237,16 +243,16 @@ static int mt_input_mapped(struct hid_device *hdev, struct hid_input *hi,
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static int mt_compute_slot(struct mt_device *td)
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{
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struct mt_class *cls = td->mtclass;
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__s32 quirks = td->mtclass->quirks;
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if (cls->quirks & MT_QUIRK_SLOT_IS_CONTACTID)
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return slot_is_contactid(td);
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if (quirks & MT_QUIRK_SLOT_IS_CONTACTID)
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return td->curdata.contactid;
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if (cls->quirks & MT_QUIRK_CYPRESS)
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if (quirks & MT_QUIRK_CYPRESS)
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return cypress_compute_slot(td);
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if (cls->quirks & MT_QUIRK_SLOT_IS_CONTACTNUMBER)
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return slot_is_contactnumber(td);
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if (quirks & MT_QUIRK_SLOT_IS_CONTACTNUMBER)
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return td->num_received;
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return find_slot_from_contactid(td);
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}
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@ -257,16 +263,12 @@ static int mt_compute_slot(struct mt_device *td)
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*/
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static void mt_complete_slot(struct mt_device *td)
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{
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td->curdata.seen_in_this_frame = true;
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if (td->curvalid) {
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struct mt_slot *slot;
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int slotnum = mt_compute_slot(td);
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if (slotnum >= 0 && slotnum < td->mtclass->maxcontacts) {
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slot = td->slots + slotnum;
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memcpy(slot, &(td->curdata), sizeof(struct mt_slot));
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slot->seen_in_this_frame = true;
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}
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if (slotnum >= 0 && slotnum < td->mtclass->maxcontacts)
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td->slots[slotnum] = td->curdata;
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}
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td->num_received++;
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}
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@ -284,21 +286,19 @@ static void mt_emit_event(struct mt_device *td, struct input_dev *input)
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struct mt_slot *s = &(td->slots[i]);
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if ((td->mtclass->quirks & MT_QUIRK_NOT_SEEN_MEANS_UP) &&
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!s->seen_in_this_frame) {
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/*
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* this slot does not contain useful data,
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* notify its closure
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*/
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s->touch_state = false;
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}
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input_mt_slot(input, i);
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input_mt_report_slot_state(input, MT_TOOL_FINGER,
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s->touch_state);
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if (s->touch_state) {
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input_event(input, EV_ABS, ABS_MT_POSITION_X, s->x);
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input_event(input, EV_ABS, ABS_MT_POSITION_Y, s->y);
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input_event(input, EV_ABS, ABS_MT_PRESSURE, s->p);
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input_event(input, EV_ABS, ABS_MT_TOUCH_MAJOR, s->w);
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input_event(input, EV_ABS, ABS_MT_TOUCH_MINOR, s->h);
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}
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s->seen_in_this_frame = false;
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}
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@ -314,16 +314,22 @@ static int mt_event(struct hid_device *hid, struct hid_field *field,
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struct hid_usage *usage, __s32 value)
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{
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struct mt_device *td = hid_get_drvdata(hid);
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__s32 quirks = td->mtclass->quirks;
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if (hid->claimed & HID_CLAIMED_INPUT) {
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switch (usage->hid) {
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case HID_DG_INRANGE:
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if (quirks & MT_QUIRK_VALID_IS_INRANGE)
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td->curvalid = value;
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break;
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case HID_DG_TIPSWITCH:
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if (quirks & MT_QUIRK_NOT_SEEN_MEANS_UP)
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td->curvalid = value;
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td->curdata.touch_state = value;
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break;
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case HID_DG_CONFIDENCE:
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if (quirks & MT_QUIRK_VALID_IS_CONFIDENCE)
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td->curvalid = value;
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break;
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case HID_DG_CONTACTID:
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td->curdata.contactid = value;
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@ -345,27 +351,27 @@ static int mt_event(struct hid_device *hid, struct hid_field *field,
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break;
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case HID_DG_CONTACTCOUNT:
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/*
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* We must not overwrite the previous value (some
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* devices send one sequence splitted over several
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* messages)
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* Includes multi-packet support where subsequent
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* packets are sent with zero contactcount.
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*/
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if (value)
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td->num_expected = value - 1;
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td->num_expected = value;
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break;
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default:
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/* fallback to the generic hidinput handling */
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return 0;
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}
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}
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if (usage->hid == td->last_slot_field)
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mt_complete_slot(td);
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if (field->index == td->last_field_index
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&& td->num_received > td->num_expected)
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&& td->num_received >= td->num_expected)
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mt_emit_event(td, field->hidinput->input);
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}
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/* we have handled the hidinput part, now remains hiddev */
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if (hid->claimed & HID_CLAIMED_HIDDEV && hid->hiddev_hid_event)
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hid->hiddev_hid_event(hid, field, usage, value);
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@ -392,9 +398,16 @@ static void mt_set_input_mode(struct hid_device *hdev)
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static int mt_probe(struct hid_device *hdev, const struct hid_device_id *id)
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{
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int ret;
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int ret, i;
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struct mt_device *td;
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struct mt_class *mtclass = mt_classes + id->driver_data;
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struct mt_class *mtclass = mt_classes; /* MT_CLS_DEFAULT */
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for (i = 0; mt_classes[i].name ; i++) {
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if (id->driver_data == mt_classes[i].name) {
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mtclass = &(mt_classes[i]);
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break;
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}
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}
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/* This allows the driver to correctly support devices
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* that emit events over several HID messages.
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@ -417,7 +430,7 @@ static int mt_probe(struct hid_device *hdev, const struct hid_device_id *id)
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goto fail;
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ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
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if (ret != 0)
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if (ret)
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goto fail;
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mt_set_input_mode(hdev);
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