@@ -1290,6 +1290,7 @@ static const struct hid_device_id hid_bl
{ HID_USB_DEVICE(USB_VENDOR_ID_BELKIN, USB_DEVICE_ID_FLIP_KVM) },
{ HID_USB_DEVICE(USB_VENDOR_ID_BTC, USB_DEVICE_ID_BTC_EMPREX_REMOTE) },
{ HID_USB_DEVICE(USB_VENDOR_ID_BTC, USB_DEVICE_ID_BTC_EMPREX_REMOTE_2) },
+ { HID_USB_DEVICE(USB_VENDOR_ID_CANDO, USB_DEVICE_ID_CANDO_PIXCIR_MULTI_TOUCH) },
{ HID_USB_DEVICE(USB_VENDOR_ID_CANDO, USB_DEVICE_ID_CANDO_MULTI_TOUCH) },
{ HID_USB_DEVICE(USB_VENDOR_ID_CANDO, USB_DEVICE_ID_CANDO_MULTI_TOUCH_11_6) },
{ HID_USB_DEVICE(USB_VENDOR_ID_CHERRY, USB_DEVICE_ID_CHERRY_CYMOTION) },
@@ -1312,6 +1313,7 @@ static const struct hid_device_id hid_bl
{ HID_USB_DEVICE(USB_VENDOR_ID_GYRATION, USB_DEVICE_ID_GYRATION_REMOTE) },
{ HID_USB_DEVICE(USB_VENDOR_ID_GYRATION, USB_DEVICE_ID_GYRATION_REMOTE_2) },
{ HID_USB_DEVICE(USB_VENDOR_ID_GYRATION, USB_DEVICE_ID_GYRATION_REMOTE_3) },
+ { HID_USB_DEVICE(USB_VENDOR_ID_HANVON, USB_DEVICE_ID_HANVON_MULTITOUCH) },
{ HID_USB_DEVICE(USB_VENDOR_ID_KENSINGTON, USB_DEVICE_ID_KS_SLIMBLADE) },
{ HID_USB_DEVICE(USB_VENDOR_ID_KYE, USB_DEVICE_ID_KYE_ERGO_525V) },
{ HID_USB_DEVICE(USB_VENDOR_ID_LABTEC, USB_DEVICE_ID_LABTEC_WIRELESS_KEYBOARD) },
@@ -132,6 +132,7 @@
#define USB_DEVICE_ID_BTC_EMPREX_REMOTE_2 0x5577
#define USB_VENDOR_ID_CANDO 0x2087
+#define USB_DEVICE_ID_CANDO_PIXCIR_MULTI_TOUCH 0x0703
#define USB_DEVICE_ID_CANDO_MULTI_TOUCH 0x0a01
#define USB_DEVICE_ID_CANDO_MULTI_TOUCH_11_6 0x0b03
@@ -295,6 +296,9 @@
#define USB_DEVICE_ID_GYRATION_REMOTE_2 0x0003
#define USB_DEVICE_ID_GYRATION_REMOTE_3 0x0008
+#define USB_VENDOR_ID_HANVON 0x20b3
+#define USB_DEVICE_ID_HANVON_MULTITOUCH 0x0a18
+
#define USB_VENDOR_ID_HAPP 0x078b
#define USB_DEVICE_ID_UGCI_DRIVING 0x0010
#define USB_DEVICE_ID_UGCI_FLYING 0x0020
@@ -0,0 +1,398 @@
+/*
+ * HID driver for multitouch panels
+ *
+ * Copyright (c) 2010 Stephane Chatty <chatty@enac.fr>
+ *
+ */
+
+/*
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the Free
+ * Software Foundation; either version 2 of the License, or (at your option)
+ * any later version.
+ */
+
+#include <linux/device.h>
+#include <linux/hid.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/usb.h>
+#include "usbhid/usbhid.h"
+
+
+MODULE_AUTHOR("Stephane Chatty <chatty@enac.fr>");
+MODULE_DESCRIPTION("HID multitouch panels");
+MODULE_LICENSE("GPL");
+
+#include "hid-ids.h"
+
+#define MAX_TRKID USHRT_MAX
+
+
+struct mt_slot {
+ __u16 x, y, p;
+ bool valid; /* did we just get valid contact data for this slot? */
+ bool prev_valid;/* was this slot previously valid/active? */
+ __u16 trkid; /* the tracking ID that was assigned to this slot */
+};
+
+struct mt_device {
+ struct mt_class *mtclass;/* our mt device class */
+ struct mt_slot *slots; /* buffer with all slots */
+ __u8 optfeatures; /* what optional mt features do we get? */
+ __u8 curcontact; /* index of the current contact */
+ __u8 maxcontact; /* expected last contact index */
+ bool curvalid; /* is the current contact valid? */
+ __u16 curcontactid; /* ContactID of the current contact */
+ __u16 curx, cury, curp; /* other attributes of the current contact */
+ __u16 lasttrkid; /* the last tracking ID we assigned */
+};
+
+struct mt_class {
+ int (*compute_slot)(struct mt_device *);
+ __u8 maxcontacts;
+ __s8 inputmode; /* InputMode HID feature number, -1 if non-existent */
+};
+
+/* classes of device behavior */
+#define DUAL1 0
+
+/* contact data that only some devices report */
+#define PRESSURE (1 << 0)
+#define SIZE (1 << 1)
+
+/*
+ * these device-dependent functions determine what slot corresponds
+ * to a valid contact that was just read.
+ */
+
+static int slot_from_contactid(struct mt_device *td)
+{
+ return td->curcontactid;
+}
+
+struct mt_class mt_classes[] = {
+ /* DUAL1 */ { slot_from_contactid, 2, -1 },
+};
+
+
+static int mt_input_mapping(struct hid_device *hdev, struct hid_input *hi,
+ struct hid_field *field, struct hid_usage *usage,
+ unsigned long **bit, int *max)
+{
+ struct mt_device *td = hid_get_drvdata(hdev);
+ switch (usage->hid & HID_USAGE_PAGE) {
+
+ case HID_UP_GENDESK:
+ switch (usage->hid) {
+ case HID_GD_X:
+ hid_map_usage(hi, usage, bit, max,
+ EV_ABS, ABS_MT_POSITION_X);
+ input_set_abs_params(hi->input, ABS_MT_POSITION_X,
+ field->logical_minimum,
+ field->logical_maximum, 0, 0);
+ /* touchscreen emulation */
+ input_set_abs_params(hi->input, ABS_X,
+ field->logical_minimum,
+ field->logical_maximum, 0, 0);
+ return 1;
+ case HID_GD_Y:
+ hid_map_usage(hi, usage, bit, max,
+ EV_ABS, ABS_MT_POSITION_Y);
+ input_set_abs_params(hi->input, ABS_MT_POSITION_Y,
+ field->logical_minimum,
+ field->logical_maximum, 0, 0);
+ /* touchscreen emulation */
+ input_set_abs_params(hi->input, ABS_Y,
+ field->logical_minimum,
+ field->logical_maximum, 0, 0);
+ return 1;
+ }
+ return 0;
+
+ case HID_UP_DIGITIZER:
+ switch (usage->hid) {
+ case HID_DG_INRANGE:
+ case HID_DG_CONFIDENCE:
+ return -1;
+ case HID_DG_TIPSWITCH:
+ hid_map_usage(hi, usage, bit, max, EV_KEY, BTN_TOUCH);
+ input_set_capability(hi->input, EV_KEY, BTN_TOUCH);
+ return 1;
+ case HID_DG_CONTACTID:
+ 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);
+ if (!hi->input->mt)
+ input_mt_create_slots(hi->input,
+ td->mtclass->maxcontacts);
+
+ case HID_DG_TIPPRESSURE:
+ hid_map_usage(hi, usage, bit, max,
+ EV_ABS, ABS_MT_PRESSURE);
+ td->optfeatures |= PRESSURE;
+ return 1;
+ case HID_DG_CONTACTCOUNT:
+ case HID_DG_CONTACTMAX:
+ return -1;
+ }
+ /* let hid-input decide for the others */
+ return 0;
+
+ case 0xff000000:
+ /* we do not want to map these: no input-oriented meaning */
+ return -1;
+ }
+
+ return 0;
+}
+
+static int mt_input_mapped(struct hid_device *hdev, struct hid_input *hi,
+ struct hid_field *field, struct hid_usage *usage,
+ unsigned long **bit, int *max)
+{
+ if (usage->type == EV_KEY || usage->type == EV_ABS)
+ set_bit(usage->type, hi->input->evbit);
+
+ return -1;
+}
+
+/*
+ * this function is called when a whole contact has been processed,
+ * so that it can assign it to a slot and store the data there
+ */
+static void mt_complete_slot(struct mt_device *td)
+{
+ if (td->curvalid) {
+ struct mt_slot *slot;
+ int slotnum = td->mtclass->compute_slot(td);
+ if (slotnum >= 0 && slotnum <= td->mtclass->maxcontacts - 1) {
+ slot = td->slots + slotnum;
+
+ slot->valid = true;
+ slot->x = td->curx;
+ slot->y = td->cury;
+ slot->p = td->curp;
+ }
+ }
+ td->curcontact++;
+}
+
+
+/*
+ * this function is called when a whole packet has been received and processed,
+ * so that it can decide what to send to the input layer.
+ */
+static void mt_emit_event(struct mt_device *td, struct input_dev *input)
+{
+ struct mt_slot *oldest = 0; /* touchscreen emulation: oldest touch */
+ int i;
+
+ for (i = 0; i < td->mtclass->maxcontacts; ++i) {
+ struct mt_slot *s = td->slots + i;
+ if (!s->valid) {
+ /*
+ * this slot does not contain useful data,
+ * notify its closure if necessary
+ */
+ if (s->prev_valid) {
+ input_mt_slot(input, i);
+ input_event(input, EV_ABS,
+ ABS_MT_TRACKING_ID, -1);
+ s->prev_valid = false;
+ }
+ continue;
+ }
+ if (!s->prev_valid)
+ s->trkid = td->lasttrkid++;
+ input_mt_slot(input, i);
+ input_event(input, EV_ABS, ABS_MT_TRACKING_ID, s->trkid);
+ input_event(input, EV_ABS, ABS_MT_POSITION_X, s->x);
+ input_event(input, EV_ABS, ABS_MT_POSITION_Y, s->y);
+ if (td->optfeatures & PRESSURE)
+ input_event(input, EV_ABS, ABS_MT_PRESSURE, s->p);
+ s->prev_valid = true;
+ s->valid = false;
+
+ /* touchscreen emulation: is this the oldest contact? */
+ if (!oldest || ((s->trkid - oldest->trkid) & (SHRT_MAX + 1)))
+ oldest = s;
+ }
+
+ /* 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_sync(input);
+ td->curcontact = 0;
+}
+
+
+
+static int mt_event(struct hid_device *hid, struct hid_field *field,
+ struct hid_usage *usage, __s32 value)
+{
+ struct mt_device *td = hid_get_drvdata(hid);
+
+ if (hid->claimed & HID_CLAIMED_INPUT) {
+ struct input_dev *input = field->hidinput->input;
+ switch (usage->hid) {
+ case HID_DG_INRANGE:
+ break;
+ case HID_DG_TIPSWITCH:
+ td->curvalid = value;
+ break;
+ case HID_DG_CONFIDENCE:
+ break;
+ case HID_DG_CONTACTID:
+ td->curcontactid = value;
+ break;
+ case HID_DG_TIPPRESSURE:
+ td->curp = value;
+ break;
+ case HID_GD_X:
+ td->curx = value;
+ break;
+ case HID_GD_Y:
+ td->cury = value;
+ /* works for devices where Y is last in a contact */
+ mt_complete_slot(td);
+ break;
+ case HID_DG_CONTACTCOUNT:
+ /*
+ * works for devices where contact count is
+ * the last field in a message
+ */
+ if (value)
+ td->maxcontact = value - 1;
+ if (td->curcontact > td->maxcontact)
+ mt_emit_event(td, input);
+ break;
+ case HID_DG_CONTACTMAX:
+ break;
+
+ default:
+ /* fallback to the generic hidinput handling */
+ return 0;
+ }
+ }
+
+ /* we have handled the hidinput part, now remains hiddev */
+ if (hid->claimed & HID_CLAIMED_HIDDEV && hid->hiddev_hid_event)
+ hid->hiddev_hid_event(hid, field, usage, value);
+
+ return 1;
+}
+
+static int mt_probe(struct hid_device *hdev, const struct hid_device_id *id)
+{
+ int ret;
+ struct mt_device *td;
+
+#if 0
+ /*
+ * todo: activate this as soon as the patch where the quirk below
+ * is defined is commited. This will allow the driver to correctly
+ * support devices that emit events over several HID messages.
+ */
+ hdev->quirks |= HID_QUIRK_NO_INPUT_SYNC;
+#endif
+
+ td = kzalloc(sizeof(struct mt_device), GFP_KERNEL);
+ if (!td) {
+ dev_err(&hdev->dev, "cannot allocate multitouch data\n");
+ return -ENOMEM;
+ }
+ td->mtclass = mt_classes + id->driver_data;
+ td->slots = kzalloc(td->mtclass->maxcontacts * sizeof(struct mt_slot),
+ GFP_KERNEL);
+ if (!td->slots) {
+ dev_err(&hdev->dev, "cannot allocate multitouch data\n");
+ ret = -ENOMEM;
+ goto fail;
+ }
+ hid_set_drvdata(hdev, td);
+
+ ret = hid_parse(hdev);
+ if (ret != 0)
+ goto fail;
+
+ ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
+ if (ret != 0)
+ goto fail;
+
+ if (td->mtclass->inputmode >= 0) {
+ struct hid_report *r;
+ struct hid_report_enum *re = hdev->report_enum
+ + HID_FEATURE_REPORT;
+ r = re->report_id_hash[td->mtclass->inputmode];
+ if (r) {
+ r->field[0]->value[0] = 0x02;
+ usbhid_submit_report(hdev, r, USB_DIR_OUT);
+ }
+ }
+ return 0;
+
+fail:
+ kfree(td);
+ return ret;
+}
+
+static void mt_remove(struct hid_device *hdev)
+{
+ struct mt_device *td = hid_get_drvdata(hdev);
+ hid_hw_stop(hdev);
+ kfree(td->slots);
+ kfree(td);
+ hid_set_drvdata(hdev, NULL);
+}
+
+static const struct hid_device_id mt_devices[] = {
+
+ /* PixCir-based panels */
+ { .driver_data = DUAL1,
+ HID_USB_DEVICE(USB_VENDOR_ID_HANVON,
+ USB_DEVICE_ID_HANVON_MULTITOUCH) },
+ { .driver_data = DUAL1,
+ HID_USB_DEVICE(USB_VENDOR_ID_CANDO,
+ USB_DEVICE_ID_CANDO_PIXCIR_MULTI_TOUCH) },
+
+ { }
+};
+MODULE_DEVICE_TABLE(hid, mt_devices);
+
+static const struct hid_usage_id mt_grabbed_usages[] = {
+ { HID_ANY_ID, HID_ANY_ID, HID_ANY_ID },
+ { HID_ANY_ID - 1, HID_ANY_ID - 1, HID_ANY_ID - 1}
+};
+
+static struct hid_driver mt_driver = {
+ .name = "hid-multitouch",
+ .id_table = mt_devices,
+ .probe = mt_probe,
+ .remove = mt_remove,
+ .input_mapping = mt_input_mapping,
+ .input_mapped = mt_input_mapped,
+ .usage_table = mt_grabbed_usages,
+ .event = mt_event,
+};
+
+static int __init mt_init(void)
+{
+ return hid_register_driver(&mt_driver);
+}
+
+static void __exit mt_exit(void)
+{
+ hid_unregister_driver(&mt_driver);
+}
+
+module_init(mt_init);
+module_exit(mt_exit);
+
@@ -264,6 +264,12 @@ config HID_MONTEREY
---help---
Support for Monterey Genius KB29E.
+config HID_MULTITOUCH
+ tristate "HID Multitouch panels"
+ depends on USB_HID
+ ---help---
+ Generic support for HID multitouch panels.
+
config HID_NTRIG
tristate "NTrig"
depends on USB_HID
@@ -43,6 +43,7 @@ obj-$(CONFIG_HID_MAGICMOUSE) += hid-m
obj-$(CONFIG_HID_MICROSOFT) += hid-microsoft.o
obj-$(CONFIG_HID_MONTEREY) += hid-monterey.o
obj-$(CONFIG_HID_MOSART) += hid-mosart.o
+obj-$(CONFIG_HID_MULTITOUCH) += hid-multitouch.o
obj-$(CONFIG_HID_NTRIG) += hid-ntrig.o
obj-$(CONFIG_HID_ORTEK) += hid-ortek.o
obj-$(CONFIG_HID_PRODIKEYS) += hid-prodikeys.o