HID: Support for MosArt multitouch panel
authorStephane Chatty <chatty@lii-enac.fr>
Sat, 6 Feb 2010 14:17:13 +0000 (15:17 +0100)
committerJiri Kosina <jkosina@suse.cz>
Wed, 10 Feb 2010 13:52:12 +0000 (14:52 +0100)
Added support for MosArt dual-touch panels, present in the Asus T91MT notebook.

Signed-off-by: Stephane Chatty <chatty@enac.fr>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
drivers/hid/Kconfig
drivers/hid/Makefile
drivers/hid/hid-core.c
drivers/hid/hid-ids.h
drivers/hid/hid-mosart.c [new file with mode: 0644]

index 617ed7db67d1e24b39ccceb413f3657005b6f762..2b93d7f647ee82211c2a4fe08c838bcab024aad6 100644 (file)
@@ -204,6 +204,12 @@ config HID_MICROSOFT
        ---help---
        Support for Microsoft devices that are not fully compliant with HID standard.
 
+config HID_MOSART
+       tristate "MosArt"
+       depends on USB_HID
+       ---help---
+       Support for MosArt dual-touch panels.
+
 config HID_MONTEREY
        tristate "Monterey" if EMBEDDED
        depends on USB_HID
index b62d4b3afdc2a1f863e775f94d0cf9fd6121919b..03051694d546d680c1720417f7cb824ac52c556a 100644 (file)
@@ -37,6 +37,7 @@ obj-$(CONFIG_HID_KYE)         += hid-kye.o
 obj-$(CONFIG_HID_LOGITECH)     += hid-logitech.o
 obj-$(CONFIG_HID_MICROSOFT)    += hid-microsoft.o
 obj-$(CONFIG_HID_MONTEREY)     += hid-monterey.o
+obj-$(CONFIG_HID_MOSART)       += hid-mosart.o
 obj-$(CONFIG_HID_NTRIG)                += hid-ntrig.o
 obj-$(CONFIG_HID_ORTEK)                += hid-ortek.o
 obj-$(CONFIG_HID_QUANTA)       += hid-quanta.o
index 282f4a1e721495cedf3ebf592acc05fc637157cd..da97195474ff0f5f78a150bc7485246fb106aa81 100644 (file)
@@ -1550,8 +1550,9 @@ static const struct hid_device_id hid_ignore_list[] = {
        { HID_USB_DEVICE(USB_VENDOR_ID_AIPTEK, USB_DEVICE_ID_AIPTEK_24) },
        { HID_USB_DEVICE(USB_VENDOR_ID_AIRCABLE, USB_DEVICE_ID_AIRCABLE1) },
        { HID_USB_DEVICE(USB_VENDOR_ID_ALCOR, USB_DEVICE_ID_ALCOR_USBRS232) },
-       { HID_USB_DEVICE(USB_VENDOR_ID_ASUS, USB_DEVICE_ID_ASUS_LCM)},
-       { HID_USB_DEVICE(USB_VENDOR_ID_ASUS, USB_DEVICE_ID_ASUS_LCM2)},
+       { HID_USB_DEVICE(USB_VENDOR_ID_ASUS, USB_DEVICE_ID_ASUS_T91MT)},
+       { HID_USB_DEVICE(USB_VENDOR_ID_ASUSTEK, USB_DEVICE_ID_ASUSTEK_LCM)},
+       { HID_USB_DEVICE(USB_VENDOR_ID_ASUSTEK, USB_DEVICE_ID_ASUSTEK_LCM2)},
        { HID_USB_DEVICE(USB_VENDOR_ID_AVERMEDIA, USB_DEVICE_ID_AVER_FM_MR800) },
        { HID_USB_DEVICE(USB_VENDOR_ID_BERKSHIRE, USB_DEVICE_ID_BERKSHIRE_PCWD) },
        { HID_USB_DEVICE(USB_VENDOR_ID_CIDC, 0x0103) },
index 282bfe8d95e873bab324736154e9af3be2b1eb45..ab370f1c4b6ea8cd43d999f7209a1deaa963cb2f 100644 (file)
 #define USB_DEVICE_ID_APPLE_ATV_IRCONTROL      0x8241
 #define USB_DEVICE_ID_APPLE_IRCONTROL4 0x8242
 
-#define USB_VENDOR_ID_ASUS             0x0b05
-#define USB_DEVICE_ID_ASUS_LCM         0x1726
-#define USB_DEVICE_ID_ASUS_LCM2                0x175b
+#define USB_VENDOR_ID_ASUS             0x0486
+#define USB_DEVICE_ID_ASUS_T91MT       0x0185
+
+#define USB_VENDOR_ID_ASUSTEK          0x0b05
+#define USB_DEVICE_ID_ASUSTEK_LCM      0x1726
+#define USB_DEVICE_ID_ASUSTEK_LCM2     0x175b
 
 #define USB_VENDOR_ID_ATEN             0x0557
 #define USB_DEVICE_ID_ATEN_UC100KM     0x2004
diff --git a/drivers/hid/hid-mosart.c b/drivers/hid/hid-mosart.c
new file mode 100644 (file)
index 0000000..f6ec4f1
--- /dev/null
@@ -0,0 +1,274 @@
+/*
+ *  HID driver for the multitouch panel on the ASUS EeePC T91MT
+ *
+ *  Copyright (c) 2009-2010 Stephane Chatty <chatty@enac.fr>
+ *  Copyright (c) 2010 Teemu Tuominen <teemu.tuominen@cybercom.com>
+ *
+ */
+
+/*
+ * 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/usb.h>
+#include "usbhid/usbhid.h"
+
+MODULE_VERSION("1.00");
+MODULE_AUTHOR("Stephane Chatty <chatty@enac.fr>");
+MODULE_DESCRIPTION("MosArt dual-touch panel");
+MODULE_LICENSE("GPL");
+
+#include "hid-ids.h"
+
+struct mosart_data {
+       __u16 x, y;
+       __u8 id;
+       bool valid;             /* valid finger data, or just placeholder? */
+       bool first;             /* is this the first finger in this frame? */
+       bool activity_now;      /* at least one active finger in this frame? */
+       bool activity;          /* at least one active finger previously? */
+};
+
+static int mosart_input_mapping(struct hid_device *hdev, struct hid_input *hi,
+               struct hid_field *field, struct hid_usage *usage,
+               unsigned long **bit, int *max)
+{
+       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);
+                       /* 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);
+                       /* 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_CONFIDENCE:
+               case HID_DG_TIPSWITCH:
+               case HID_DG_INPUTMODE:
+               case HID_DG_DEVICEINDEX:
+               case HID_DG_CONTACTCOUNT:
+               case HID_DG_CONTACTMAX:
+               case HID_DG_TIPPRESSURE:
+               case HID_DG_WIDTH:
+               case HID_DG_HEIGHT:
+                       return -1;
+               case HID_DG_INRANGE:
+                       /* touchscreen emulation */
+                       hid_map_usage(hi, usage, bit, max, EV_KEY, BTN_TOUCH);
+                       return 1;
+
+               case HID_DG_CONTACTID:
+                       hid_map_usage(hi, usage, bit, max,
+                                       EV_ABS, ABS_MT_TRACKING_ID);
+                       return 1;
+
+               }
+               return 0;
+
+       case 0xff000000:
+               /* ignore HID features */
+               return -1;
+       }
+
+       return 0;
+}
+
+static int mosart_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)
+               clear_bit(usage->code, *bit);
+
+       return 0;
+}
+
+/*
+ * this function is called when a whole finger has been parsed,
+ * so that it can decide what to send to the input layer.
+ */
+static void mosart_filter_event(struct mosart_data *td, struct input_dev *input)
+{
+       td->first = !td->first; /* touchscreen emulation */
+
+       if (!td->valid) {
+               /*
+                * touchscreen emulation: if no finger in this frame is valid
+                * and there previously was finger activity, this is a release
+                */ 
+               if (!td->first && !td->activity_now && td->activity) {
+                       input_event(input, EV_KEY, BTN_TOUCH, 0);
+                       td->activity = false;
+               }
+               return;
+       }
+
+       input_event(input, EV_ABS, ABS_MT_TRACKING_ID, td->id);
+       input_event(input, EV_ABS, ABS_MT_POSITION_X, td->x);
+       input_event(input, EV_ABS, ABS_MT_POSITION_Y, td->y);
+
+       input_mt_sync(input);
+       td->valid = false;
+
+       /* touchscreen emulation: if first active finger in this frame... */
+       if (!td->activity_now) {
+               /* if there was no previous activity, emit touch event */
+               if (!td->activity) {
+                       input_event(input, EV_KEY, BTN_TOUCH, 1);
+                       td->activity = true;
+               }
+               td->activity_now = true;
+               /* and in any case this is our preferred finger */
+               input_event(input, EV_ABS, ABS_X, td->x);
+               input_event(input, EV_ABS, ABS_Y, td->y);
+       }
+}
+
+
+static int mosart_event(struct hid_device *hid, struct hid_field *field,
+                               struct hid_usage *usage, __s32 value)
+{
+       struct mosart_data *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:
+                       td->valid = !!value;
+                       break;
+               case HID_GD_X:
+                       td->x = value;
+                       break;
+               case HID_GD_Y:
+                       td->y = value;
+                       mosart_filter_event(td, input);
+                       break;
+               case HID_DG_CONTACTID:
+                       td->id = value;
+                       break;
+               case HID_DG_CONTACTCOUNT:
+                       /* touch emulation: this is the last field in a frame */
+                       td->first = false;
+                       td->activity_now = false;
+                       break;
+               case HID_DG_CONFIDENCE:
+               case HID_DG_TIPSWITCH:
+                       /* avoid interference from generic hidinput handling */
+                       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 mosart_probe(struct hid_device *hdev, const struct hid_device_id *id)
+{
+       int ret;
+       struct mosart_data *td;
+
+
+       td = kmalloc(sizeof(struct mosart_data), GFP_KERNEL);
+       if (!td) {
+               dev_err(&hdev->dev, "cannot allocate MosArt data\n");
+               return -ENOMEM;
+       }
+       td->valid = false;
+       td->activity = false;
+       td->activity_now = false;
+       td->first = false;
+       hid_set_drvdata(hdev, td);
+
+       /* currently, it's better to have one evdev device only */
+#if 0
+       hdev->quirks |= HID_QUIRK_MULTI_INPUT;
+#endif
+
+       ret = hid_parse(hdev);
+       if (ret == 0)
+               ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
+
+       if (ret == 0) {
+               struct hid_report_enum *re = hdev->report_enum
+                                               + HID_FEATURE_REPORT;
+               struct hid_report *r = re->report_id_hash[7];
+
+               r->field[0]->value[0] = 0x02;
+               usbhid_submit_report(hdev, r, USB_DIR_OUT);
+       } else 
+               kfree(td);
+
+       return ret;
+}
+
+static void mosart_remove(struct hid_device *hdev)
+{
+       hid_hw_stop(hdev);
+       kfree(hid_get_drvdata(hdev));
+       hid_set_drvdata(hdev, NULL);
+}
+
+static const struct hid_device_id mosart_devices[] = {
+       { HID_USB_DEVICE(USB_VENDOR_ID_ASUS, USB_DEVICE_ID_ASUS_T91MT) },
+       { }
+};
+MODULE_DEVICE_TABLE(hid, mosart_devices);
+
+static const struct hid_usage_id mosart_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 mosart_driver = {
+       .name = "mosart",
+       .id_table = mosart_devices,
+       .probe = mosart_probe,
+       .remove = mosart_remove,
+       .input_mapping = mosart_input_mapping,
+       .input_mapped = mosart_input_mapped,
+       .usage_table = mosart_grabbed_usages,
+       .event = mosart_event,
+};
+
+static int __init mosart_init(void)
+{
+       return hid_register_driver(&mosart_driver);
+}
+
+static void __exit mosart_exit(void)
+{
+       hid_unregister_driver(&mosart_driver);
+}
+
+module_init(mosart_init);
+module_exit(mosart_exit);
+