* HID driver for multitouch panels
*
* Copyright (c) 2010-2012 Stephane Chatty <chatty@enac.fr>
- * Copyright (c) 2010-2012 Benjamin Tissoires <benjamin.tissoires@gmail.com>
+ * Copyright (c) 2010-2013 Benjamin Tissoires <benjamin.tissoires@gmail.com>
* Copyright (c) 2010-2012 Ecole Nationale de l'Aviation Civile, France
+ * Copyright (c) 2012-2013 Red Hat, Inc
*
* This code is partly based on hid-egalax.c:
*
* any later version.
*/
+/*
+ * This driver is regularly tested thanks to the tool hid-test[1].
+ * This tool relies on hid-replay[2] and a database of hid devices[3].
+ * Please run these regression tests before patching this module so that
+ * your patch won't break existing known devices.
+ *
+ * [1] https://github.com/bentiss/hid-test
+ * [2] https://github.com/bentiss/hid-replay
+ * [3] https://github.com/bentiss/hid-devices
+ */
+
#include <linux/device.h>
#include <linux/hid.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/usb.h>
#include <linux/input/mt.h>
-#include "usbhid/usbhid.h"
+#include <linux/string.h>
MODULE_AUTHOR("Stephane Chatty <chatty@enac.fr>");
multitouch fields */
int cc_index; /* contact count field index in the report */
int cc_value_index; /* contact count value index in the field */
- unsigned last_field_index; /* last field index of the report */
unsigned last_slot_field; /* the last field of a slot */
unsigned mt_report_id; /* the report ID of the multitouch device */
+ unsigned pen_report_id; /* the report ID of the pen device */
__s8 inputmode; /* InputMode HID feature, -1 if non-existent */
__s8 inputmode_index; /* InputMode HID feature index in the report */
__s8 maxcontact_report_id; /* Maximum Contact Number HID feature,
unsigned mt_flags; /* flags to pass to input-mt */
};
+static void mt_post_parse_default_settings(struct mt_device *td);
+static void mt_post_parse(struct mt_device *td);
+
/* classes of device behavior */
#define MT_CLS_DEFAULT 0x0001
{ }
};
+static void mt_free_input_name(struct hid_input *hi)
+{
+ struct hid_device *hdev = hi->report->device;
+ const char *name = hi->input->name;
+
+ if (name != hdev->name) {
+ hi->input->name = hdev->name;
+ kfree(name);
+ }
+}
+
static ssize_t mt_show_quirks(struct device *dev,
struct device_attribute *attr,
char *buf)
f->usages[f->length++] = usage->hid;
}
-static int mt_input_mapping(struct hid_device *hdev, struct hid_input *hi,
+static int mt_pen_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);
+
+ td->pen_report_id = field->report->id;
+
+ return 0;
+}
+
+static int mt_pen_input_mapped(struct hid_device *hdev, struct hid_input *hi,
+ struct hid_field *field, struct hid_usage *usage,
+ unsigned long **bit, int *max)
+{
+ return 0;
+}
+
+static int mt_pen_event(struct hid_device *hid, struct hid_field *field,
+ struct hid_usage *usage, __s32 value)
+{
+ /* let hid-input handle it */
+ return 0;
+}
+
+static void mt_pen_report(struct hid_device *hid, struct hid_report *report)
+{
+ struct hid_field *field = report->field[0];
+
+ input_sync(field->hidinput->input);
+}
+
+static void mt_pen_input_configured(struct hid_device *hdev,
+ struct hid_input *hi)
+{
+ char *name = kzalloc(strlen(hi->input->name) + 5, GFP_KERNEL);
+ if (name) {
+ sprintf(name, "%s Pen", hi->input->name);
+ mt_free_input_name(hi);
+ hi->input->name = name;
+ }
+
+ /* force BTN_STYLUS to allow tablet matching in udev */
+ __set_bit(BTN_STYLUS, hi->input->keybit);
+}
+
+static int mt_touch_input_mapping(struct hid_device *hdev, struct hid_input *hi,
struct hid_field *field, struct hid_usage *usage,
unsigned long **bit, int *max)
{
int code;
struct hid_usage *prev_usage = NULL;
- /* Only map fields from TouchScreen or TouchPad collections.
- * We need to ignore fields that belong to other collections
- * such as Mouse that might have the same GenericDesktop usages. */
if (field->application == HID_DG_TOUCHSCREEN)
td->mt_flags |= INPUT_MT_DIRECT;
- else if (field->application != HID_DG_TOUCHPAD)
- return 0;
/*
* Model touchscreens providing buttons as touchpads.
(usage->hid & HID_USAGE_PAGE) == HID_UP_BUTTON)
td->mt_flags |= INPUT_MT_POINTER;
- /* eGalax devices provide a Digitizer.Stylus input which overrides
- * the correct Digitizers.Finger X/Y ranges.
- * Let's just ignore this input. */
- if (field->physical == HID_DG_STYLUS)
- return -1;
-
if (usage->usage_index)
prev_usage = &field->usage[usage->usage_index - 1];
}
mt_store_field(usage, td, hi);
- td->last_field_index = field->index;
return 1;
case HID_GD_Y:
if (prev_usage && (prev_usage->hid == usage->hid)) {
}
mt_store_field(usage, td, hi);
- td->last_field_index = field->index;
return 1;
}
return 0;
ABS_MT_DISTANCE, 0, 1, 0, 0);
}
mt_store_field(usage, td, hi);
- td->last_field_index = field->index;
return 1;
case HID_DG_CONFIDENCE:
mt_store_field(usage, td, hi);
- td->last_field_index = field->index;
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);
mt_store_field(usage, td, hi);
- td->last_field_index = field->index;
return 1;
case HID_DG_CONTACTID:
mt_store_field(usage, td, hi);
- td->last_field_index = field->index;
td->touches_by_report++;
td->mt_report_id = field->report->id;
return 1;
set_abs(hi->input, ABS_MT_TOUCH_MAJOR, field,
cls->sn_width);
mt_store_field(usage, td, hi);
- td->last_field_index = field->index;
return 1;
case HID_DG_HEIGHT:
hid_map_usage(hi, usage, bit, max,
ABS_MT_ORIENTATION, 0, 1, 0, 0);
}
mt_store_field(usage, td, hi);
- td->last_field_index = field->index;
return 1;
case HID_DG_TIPPRESSURE:
hid_map_usage(hi, usage, bit, max,
set_abs(hi->input, ABS_MT_PRESSURE, field,
cls->sn_pressure);
mt_store_field(usage, td, hi);
- td->last_field_index = field->index;
return 1;
case HID_DG_CONTACTCOUNT:
td->cc_index = field->index;
td->cc_value_index = usage->usage_index;
- td->last_field_index = field->index;
return 1;
case HID_DG_CONTACTMAX:
/* we don't set td->last_slot_field as contactcount and
* contact max are global to the report */
- td->last_field_index = field->index;
return -1;
case HID_DG_TOUCH:
/* Legacy devices use TIPSWITCH and not TOUCH.
return 0;
}
-static int mt_input_mapped(struct hid_device *hdev, struct hid_input *hi,
+static int mt_touch_input_mapped(struct hid_device *hdev, struct hid_input *hi,
struct hid_field *field, struct hid_usage *usage,
unsigned long **bit, int *max)
{
td->num_received = 0;
}
-static int mt_event(struct hid_device *hid, struct hid_field *field,
+static int mt_touch_event(struct hid_device *hid, struct hid_field *field,
struct hid_usage *usage, __s32 value)
{
/* we will handle the hidinput part later, now remains hiddev */
if (usage->usage_index + 1 == field->report_count) {
/* we only take into account the last report. */
if (usage->hid == td->last_slot_field)
- mt_complete_slot(td, input);
-
- if (field->index == td->last_field_index
- && td->num_received >= td->num_expected)
- mt_sync_frame(td, field->hidinput->input);
+ mt_complete_slot(td, field->hidinput->input);
}
}
}
-static void mt_report(struct hid_device *hid, struct hid_report *report)
+static void mt_touch_report(struct hid_device *hid, struct hid_report *report)
{
struct mt_device *td = hid_get_drvdata(hid);
struct hid_field *field;
unsigned count;
int r, n;
- if (report->id != td->mt_report_id)
- return;
-
- if (!(hid->claimed & HID_CLAIMED_INPUT))
- return;
-
/*
* Includes multi-packet support where subsequent
* packets are sent with zero contactcount.
mt_process_mt_event(hid, field, &field->usage[n],
field->value[n]);
}
+
+ if (td->num_received >= td->num_expected)
+ mt_sync_frame(td, report->field[0]->hidinput->input);
+}
+
+static void mt_touch_input_configured(struct hid_device *hdev,
+ struct hid_input *hi)
+{
+ struct mt_device *td = hid_get_drvdata(hdev);
+ struct mt_class *cls = &td->mtclass;
+ struct input_dev *input = hi->input;
+
+ if (!td->maxcontacts)
+ td->maxcontacts = MT_DEFAULT_MAXCONTACT;
+
+ mt_post_parse(td);
+ if (td->serial_maybe)
+ mt_post_parse_default_settings(td);
+
+ if (cls->is_indirect)
+ td->mt_flags |= INPUT_MT_POINTER;
+
+ if (cls->quirks & MT_QUIRK_NOT_SEEN_MEANS_UP)
+ td->mt_flags |= INPUT_MT_DROP_UNUSED;
+
+ input_mt_init_slots(input, td->maxcontacts, td->mt_flags);
+
+ td->mt_flags = 0;
+}
+
+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)
+{
+ /* Only map fields from TouchScreen or TouchPad collections.
+ * We need to ignore fields that belong to other collections
+ * such as Mouse that might have the same GenericDesktop usages. */
+ if (field->application != HID_DG_TOUCHSCREEN &&
+ field->application != HID_DG_PEN &&
+ field->application != HID_DG_TOUCHPAD)
+ return -1;
+
+ if (field->physical == HID_DG_STYLUS)
+ return mt_pen_input_mapping(hdev, hi, field, usage, bit, max);
+
+ return mt_touch_input_mapping(hdev, hi, field, usage, bit, max);
+}
+
+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 (field->physical == HID_DG_STYLUS)
+ return mt_pen_input_mapped(hdev, hi, field, usage, bit, max);
+
+ return mt_touch_input_mapped(hdev, hi, field, usage, bit, max);
+}
+
+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 (field->report->id == td->mt_report_id)
+ return mt_touch_event(hid, field, usage, value);
+
+ if (field->report->id == td->pen_report_id)
+ return mt_pen_event(hid, field, usage, value);
+
+ /* ignore other reports */
+ return 1;
+}
+
+static void mt_report(struct hid_device *hid, struct hid_report *report)
+{
+ struct mt_device *td = hid_get_drvdata(hid);
+
+ if (!(hid->claimed & HID_CLAIMED_INPUT))
+ return;
+
+ if (report->id == td->mt_report_id)
+ mt_touch_report(hid, report);
+
+ if (report->id == td->pen_report_id)
+ mt_pen_report(hid, report);
}
static void mt_set_input_mode(struct hid_device *hdev)
r = re->report_id_hash[td->inputmode];
if (r) {
r->field[0]->value[td->inputmode_index] = 0x02;
- usbhid_submit_report(hdev, r, USB_DIR_OUT);
+ hid_hw_request(hdev, r, HID_REQ_SET_REPORT);
}
}
max = min(fieldmax, max);
if (r->field[0]->value[0] != max) {
r->field[0]->value[0] = max;
- usbhid_submit_report(hdev, r, USB_DIR_OUT);
+ hid_hw_request(hdev, r, HID_REQ_SET_REPORT);
}
}
}
}
static void mt_input_configured(struct hid_device *hdev, struct hid_input *hi)
-
{
struct mt_device *td = hid_get_drvdata(hdev);
- struct mt_class *cls = &td->mtclass;
- struct input_dev *input = hi->input;
+ char *name = kstrdup(hdev->name, GFP_KERNEL);
- /* Only initialize slots for MT input devices */
- if (!test_bit(ABS_MT_POSITION_X, input->absbit))
- return;
+ if (name)
+ hi->input->name = name;
- if (!td->maxcontacts)
- td->maxcontacts = MT_DEFAULT_MAXCONTACT;
+ if (hi->report->id == td->mt_report_id)
+ mt_touch_input_configured(hdev, hi);
- mt_post_parse(td);
- if (td->serial_maybe)
- mt_post_parse_default_settings(td);
-
- if (cls->is_indirect)
- td->mt_flags |= INPUT_MT_POINTER;
-
- if (cls->quirks & MT_QUIRK_NOT_SEEN_MEANS_UP)
- td->mt_flags |= INPUT_MT_DROP_UNUSED;
-
- input_mt_init_slots(input, td->maxcontacts, td->mt_flags);
-
- td->mt_flags = 0;
+ if (hi->report->id == td->pen_report_id)
+ mt_pen_input_configured(hdev, hi);
}
static int mt_probe(struct hid_device *hdev, const struct hid_device_id *id)
int ret, i;
struct mt_device *td;
struct mt_class *mtclass = mt_classes; /* MT_CLS_DEFAULT */
+ struct hid_input *hi;
for (i = 0; mt_classes[i].name ; i++) {
if (id->driver_data == mt_classes[i].name) {
*/
hdev->quirks |= HID_QUIRK_NO_INPUT_SYNC;
+ /*
+ * This allows the driver to handle different input sensors
+ * that emits events through different reports on the same HID
+ * device.
+ */
+ hdev->quirks |= HID_QUIRK_MULTI_INPUT;
+ hdev->quirks |= HID_QUIRK_NO_EMPTY_INPUT;
+
td = kzalloc(sizeof(struct mt_device), GFP_KERNEL);
if (!td) {
dev_err(&hdev->dev, "cannot allocate multitouch data\n");
td->inputmode = -1;
td->maxcontact_report_id = -1;
td->cc_index = -1;
+ td->mt_report_id = -1;
+ td->pen_report_id = -1;
hid_set_drvdata(hdev, td);
td->fields = kzalloc(sizeof(struct mt_fields), GFP_KERNEL);
ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
if (ret)
- goto fail;
+ goto hid_fail;
ret = sysfs_create_group(&hdev->dev.kobj, &mt_attribute_group);
return 0;
+hid_fail:
+ list_for_each_entry(hi, &hdev->inputs, list)
+ mt_free_input_name(hi);
fail:
kfree(td->fields);
kfree(td);
static int mt_resume(struct hid_device *hdev)
{
- struct usb_interface *intf;
- struct usb_host_interface *interface;
- struct usb_device *dev;
-
- if (hdev->bus != BUS_USB)
- return 0;
-
- intf = to_usb_interface(hdev->dev.parent);
- interface = intf->cur_altsetting;
- dev = hid_to_usb_dev(hdev);
-
/* Some Elan legacy devices require SET_IDLE to be set on resume.
* It should be safe to send it to other devices too.
* Tested on 3M, Stantum, Cypress, Zytronic, eGalax, and Elan panels. */
- usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
- HID_REQ_SET_IDLE,
- USB_TYPE_CLASS | USB_RECIP_INTERFACE,
- 0, interface->desc.bInterfaceNumber,
- NULL, 0, USB_CTRL_SET_TIMEOUT);
+ hid_hw_idle(hdev, 0, 0, HID_REQ_SET_IDLE);
return 0;
}
static void mt_remove(struct hid_device *hdev)
{
struct mt_device *td = hid_get_drvdata(hdev);
+ struct hid_input *hi;
+
sysfs_remove_group(&hdev->dev.kobj, &mt_attribute_group);
+ list_for_each_entry(hi, &hdev->inputs, list)
+ mt_free_input_name(hi);
+
hid_hw_stop(hdev);
+
kfree(td);
hid_set_drvdata(hdev, NULL);
}
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