| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Message-Id: <20180621120908.16706-6-benjamin.tissoires@redhat.com>
Date: Thu, 21 Jun 2018 14:09:01 +0200
From: Benjamin Tissoires <benjamin.tissoires@...hat.com>
To: Jiri Kosina <jikos@...nel.org>,
Dmitry Torokhov <dmitry.torokhov@...il.com>
Cc: Mario.Limonciello@...l.com,
Peter Hutterer <peter.hutterer@...-t.net>,
linux-input@...r.kernel.org, linux-kernel@...r.kernel.org,
Benjamin Tissoires <benjamin.tissoires@...hat.com>
Subject: [PATCH v3 05/12] HID: multitouch: ditch mt_report_id
Now that the driver can handle more than one multitouch collection in
a single HID device, ditch the last bit that contains us to use only
one mt collection.
Signed-off-by: Benjamin Tissoires <benjamin.tissoires@...hat.com>
---
no changes in v2
no changes in v3
---
drivers/hid/hid-multitouch.c | 126 ++++++++++++++++++++++++++++++++-----------
1 file changed, 94 insertions(+), 32 deletions(-)
diff --git a/drivers/hid/hid-multitouch.c b/drivers/hid/hid-multitouch.c
index beaac36f61a7..a2c10fc62ef2 100644
--- a/drivers/hid/hid-multitouch.c
+++ b/drivers/hid/hid-multitouch.c
@@ -147,6 +147,13 @@ struct mt_fields {
unsigned int length;
};
+struct mt_report_data {
+ struct list_head list;
+ struct hid_report *report;
+ struct mt_application *application;
+ bool is_mt_collection;
+};
+
struct mt_device {
struct mt_class mtclass; /* our mt device class */
struct timer_list release_timer; /* to release sticky fingers */
@@ -154,13 +161,13 @@ struct mt_device {
struct mt_fields *fields; /* temporary placeholder for storing the
multitouch fields */
unsigned long mt_io_flags; /* mt flags (MT_IO_FLAGS_*) */
- unsigned mt_report_id; /* the report ID of the multitouch device */
__u8 inputmode_value; /* InputMode HID feature value */
__u8 maxcontacts;
bool is_buttonpad; /* is this device a button pad? */
bool serial_maybe; /* need to check for serial protocol */
struct list_head applications;
+ struct list_head reports;
};
static void mt_post_parse_default_settings(struct mt_device *td,
@@ -526,6 +533,60 @@ static struct mt_application *mt_find_application(struct mt_device *td,
return mt_application;
}
+static struct mt_report_data *mt_allocate_report_data(struct mt_device *td,
+ struct hid_report *report)
+{
+ struct mt_report_data *rdata;
+ struct hid_field *field;
+ int r, n;
+
+ rdata = devm_kzalloc(&td->hdev->dev, sizeof(*rdata), GFP_KERNEL);
+ if (!rdata)
+ return NULL;
+
+ rdata->report = report;
+ rdata->application = mt_find_application(td, report->application);
+
+ if (!rdata->application) {
+ devm_kfree(&td->hdev->dev, rdata);
+ return NULL;
+ }
+
+ for (r = 0; r < report->maxfield; r++) {
+ field = report->field[r];
+
+ if (!(HID_MAIN_ITEM_VARIABLE & field->flags))
+ continue;
+
+ for (n = 0; n < field->report_count; n++) {
+ if (field->usage[n].hid == HID_DG_CONTACTID)
+ rdata->is_mt_collection = true;
+ }
+ }
+
+ list_add_tail(&rdata->list, &td->reports);
+
+ return rdata;
+}
+
+static struct mt_report_data *mt_find_report_data(struct mt_device *td,
+ struct hid_report *report)
+{
+ struct mt_report_data *tmp, *rdata = NULL;
+
+ list_for_each_entry(tmp, &td->reports, list) {
+ if (report == tmp->report) {
+ rdata = tmp;
+ break;
+ }
+ }
+
+ if (!rdata)
+ rdata = mt_allocate_report_data(td, report);
+
+ return rdata;
+}
+
static void mt_store_field(struct hid_usage *usage, struct mt_device *td,
struct hid_input *hi)
{
@@ -614,7 +675,6 @@ static int mt_touch_input_mapping(struct hid_device *hdev, struct hid_input *hi,
case HID_DG_CONTACTID:
mt_store_field(usage, td, hi);
app->touches_by_report++;
- td->mt_report_id = field->report->id;
return 1;
case HID_DG_WIDTH:
hid_map_usage(hi, usage, bit, max,
@@ -979,10 +1039,12 @@ static void mt_process_mt_event(struct hid_device *hid, struct hid_field *field,
}
}
-static void mt_touch_report(struct hid_device *hid, struct hid_report *report)
+static void mt_touch_report(struct hid_device *hid,
+ struct mt_report_data *rdata)
{
struct mt_device *td = hid_get_drvdata(hid);
- struct mt_application *app;
+ struct hid_report *report = rdata->report;
+ struct mt_application *app = rdata->application;
struct hid_field *field;
bool first_packet;
unsigned count;
@@ -994,11 +1056,6 @@ static void mt_touch_report(struct hid_device *hid, struct hid_report *report)
if (test_and_set_bit(MT_IO_FLAGS_RUNNING, &td->mt_io_flags))
return;
- app = mt_find_application(td, report->application);
-
- if (!app)
- return;
-
/*
* Includes multi-packet support where subsequent
* packets are sent with zero contactcount.
@@ -1119,8 +1176,15 @@ static int mt_input_mapping(struct hid_device *hdev, struct hid_input *hi,
{
struct mt_device *td = hid_get_drvdata(hdev);
struct mt_application *application;
+ struct mt_report_data *rdata;
+
+ rdata = mt_find_report_data(td, field->report);
+ if (!rdata) {
+ hid_err(hdev, "failed to allocate data for report\n");
+ return 0;
+ }
- application = mt_find_application(td, field->application);
+ application = rdata->application;
/*
* If mtclass.export_all_inputs is not set, only map fields from
@@ -1163,22 +1227,9 @@ static int mt_input_mapping(struct hid_device *hdev, struct hid_input *hi,
return 1;
}
- /*
- * some egalax touchscreens have "application == HID_DG_TOUCHSCREEN"
- * for the stylus.
- * The check for mt_report_id ensures we don't process
- * HID_DG_CONTACTCOUNT from the pen report as it is outside the physical
- * collection, but within the report ID.
- */
- if (field->physical == HID_DG_STYLUS)
- return 0;
- else if ((field->physical == 0) &&
- (field->report->id != td->mt_report_id) &&
- (td->mt_report_id != -1))
- return 0;
-
- if (field->application == HID_DG_TOUCHSCREEN ||
- field->application == HID_DG_TOUCHPAD)
+ if (rdata->is_mt_collection &&
+ (field->application == HID_DG_TOUCHSCREEN ||
+ field->application == HID_DG_TOUCHPAD))
return mt_touch_input_mapping(hdev, hi, field, usage, bit, max,
application);
@@ -1211,8 +1262,10 @@ 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);
+ struct mt_report_data *rdata;
- if (field->report->id == td->mt_report_id)
+ rdata = mt_find_report_data(td, field->report);
+ if (rdata && rdata->is_mt_collection)
return mt_touch_event(hid, field, usage, value);
return 0;
@@ -1222,12 +1275,14 @@ static void mt_report(struct hid_device *hid, struct hid_report *report)
{
struct mt_device *td = hid_get_drvdata(hid);
struct hid_field *field = report->field[0];
+ struct mt_report_data *rdata;
if (!(hid->claimed & HID_CLAIMED_INPUT))
return;
- if (report->id == td->mt_report_id)
- return mt_touch_report(hid, report);
+ rdata = mt_find_report_data(td, report);
+ if (rdata && rdata->is_mt_collection)
+ return mt_touch_report(hid, rdata);
if (field && field->hidinput && field->hidinput->input)
input_sync(field->hidinput->input);
@@ -1368,15 +1423,22 @@ static int mt_input_configured(struct hid_device *hdev, struct hid_input *hi)
char *name;
const char *suffix = NULL;
unsigned int application = 0;
+ struct mt_report_data *rdata;
struct mt_application *mt_application = NULL;
struct hid_report *report;
int ret;
list_for_each_entry(report, &hi->reports, hidinput_list) {
application = report->application;
- mt_application = mt_find_application(td, application);
+ rdata = mt_find_report_data(td, report);
+ if (!rdata) {
+ hid_err(hdev, "failed to allocate data for report\n");
+ return -ENOMEM;
+ }
+
+ mt_application = rdata->application;
- if (report->id == td->mt_report_id) {
+ if (rdata->is_mt_collection) {
ret = mt_touch_input_configured(hdev, hi,
mt_application);
if (ret)
@@ -1529,10 +1591,10 @@ static int mt_probe(struct hid_device *hdev, const struct hid_device_id *id)
td->hdev = hdev;
td->mtclass = *mtclass;
td->inputmode_value = MT_INPUTMODE_TOUCHSCREEN;
- td->mt_report_id = -1;
hid_set_drvdata(hdev, td);
INIT_LIST_HEAD(&td->applications);
+ INIT_LIST_HEAD(&td->reports);
td->fields = devm_kzalloc(&hdev->dev, sizeof(struct mt_fields),
GFP_KERNEL);
--
2.14.3
Powered by blists - more mailing lists