Merge branch 'for-linus' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/jikos/hid

Pull HID updates from Jiri Kosina:

 - high resolution mode for Dell canvas support, from Benjamin Tissoires

 - pen handling fixes for the Wacom driver, from Jason Gerecke

 - i2c-hid: Apollo-Lake based laptops improvements, from Hans de Goede

 - Input/Core: eraser tool support, from Ping Cheng

 - new ALPS touchpad (T4, found currently on HP EliteBook 1000, Zbook
   Stduio and HP Elite book x360) supportm from Masaki Ota

 - other smaller assorted fixes

* 'for-linus' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/jikos/hid: (33 commits)
  HID: cp2112: fix broken gpio_direction_input callback
  HID: cp2112: fix interface specification URL
  HID: Wacom: switch Dell canvas into highres mode
  HID: wacom: generic: Send BTN_STYLUS3 when both barrel switches are set
  HID: sony: Fix SHANWAN pad rumbling on USB
  HID: i2c-hid: Add no-irq-after-reset quirk for 0911:5288 device
  HID: add backlight level quirk for Asus ROG laptops
  HID: cp2112: add HIDRAW dependency
  HID: Add ID 044f:b605 ThrustMaster, Inc. force feedback Racing Wheel
  HID: hid-logitech: remove redundant assignment to pointer value
  HID: wacom: generic: Recognize WACOM_HID_WD_PEN as a type of pen collection
  HID: rmi: Check that a device is a RMI device before calling RMI functions
  HID: add multi-input quirk for GamepadBlock
  HID: alps: add new U1 device ID
  HID: alps: add support for Alps T4 Touchpad device
  HID: alps: remove variables local to u1_init() from the device struct
  HID: alps: properly handle max_fingers and minimum on X and Y axis
  HID: alps: Separate U1 device code
  HID: alps: delete unnecessary struct u1_dev devInfo
  HID: usbhid: Convert timers to use timer_setup()
  ...

1 files changed, 48 insertions, 4 deletions

diff --git a/drivers/hid/hid-multitouch.c b/drivers/hid/hid-multitouch.c
index 9e8c4d2..65ea23b 100644
--- a/drivers/hid/hid-multitouch.c
+++ b/drivers/hid/hid-multitouch.c
@@ -43,6 +43,7 @@
 #include <linux/module.h>
 #include <linux/slab.h>
 #include <linux/input/mt.h>
+#include <linux/jiffies.h>
 #include <linux/string.h>
 #include <linux/timer.h>
 
@@ -112,6 +113,7 @@ struct mt_device {
 	struct mt_slot curdata;	/* placeholder of incoming data */
 	struct mt_class mtclass;	/* our mt device class */
 	struct timer_list release_timer;	/* to release sticky fingers */
+	struct hid_device *hdev;	/* hid_device we're attached to */
 	struct mt_fields *fields;	/* temporary placeholder for storing the
 					   multitouch fields */
 	unsigned long mt_io_flags;	/* mt flags (MT_IO_FLAGS_*) */
@@ -136,6 +138,9 @@ struct mt_device {
 	bool serial_maybe;	/* need to check for serial protocol */
 	bool curvalid;		/* is the current contact valid? */
 	unsigned mt_flags;	/* flags to pass to input-mt */
+	__s32 dev_time;		/* the scan time provided by the device */
+	unsigned long jiffies;	/* the frame's jiffies */
+	int timestamp;		/* the timestamp to be sent */
 };
 
 static void mt_post_parse_default_settings(struct mt_device *td);
@@ -177,6 +182,12 @@ static void mt_post_parse(struct mt_device *td);
 #define MT_DEFAULT_MAXCONTACT	10
 #define MT_MAX_MAXCONTACT	250
 
+/*
+ * Resync device and local timestamps after that many microseconds without
+ * receiving data.
+ */
+#define MAX_TIMESTAMP_INTERVAL	1000000
+
 #define MT_USB_DEVICE(v, p)	HID_DEVICE(BUS_USB, HID_GROUP_MULTITOUCH, v, p)
 #define MT_BT_DEVICE(v, p)	HID_DEVICE(BUS_BLUETOOTH, HID_GROUP_MULTITOUCH, v, p)
 
@@ -583,6 +594,12 @@ static int mt_touch_input_mapping(struct hid_device *hdev, struct hid_input *hi,
 				cls->sn_pressure);
 			mt_store_field(usage, td, hi);
 			return 1;
+		case HID_DG_SCANTIME:
+			hid_map_usage(hi, usage, bit, max,
+				EV_MSC, MSC_TIMESTAMP);
+			input_set_capability(hi->input, EV_MSC, MSC_TIMESTAMP);
+			mt_store_field(usage, td, hi);
+			return 1;
 		case HID_DG_CONTACTCOUNT:
 			/* Ignore if indexes are out of bounds. */
 			if (field->index >= field->report->maxfield ||
@@ -718,6 +735,7 @@ static void mt_complete_slot(struct mt_device *td, struct input_dev *input)
 static void mt_sync_frame(struct mt_device *td, struct input_dev *input)
 {
 	input_mt_sync_frame(input);
+	input_event(input, EV_MSC, MSC_TIMESTAMP, td->timestamp);
 	input_sync(input);
 	td->num_received = 0;
 	if (test_bit(MT_IO_FLAGS_ACTIVE_SLOTS, &td->mt_io_flags))
@@ -727,6 +745,28 @@ static void mt_sync_frame(struct mt_device *td, struct input_dev *input)
 	clear_bit(MT_IO_FLAGS_ACTIVE_SLOTS, &td->mt_io_flags);
 }
 
+static int mt_compute_timestamp(struct mt_device *td, struct hid_field *field,
+		__s32 value)
+{
+	long delta = value - td->dev_time;
+	unsigned long jdelta = jiffies_to_usecs(jiffies - td->jiffies);
+
+	td->jiffies = jiffies;
+	td->dev_time = value;
+
+	if (delta < 0)
+		delta += field->logical_maximum;
+
+	/* HID_DG_SCANTIME is expressed in 100us, we want it in us. */
+	delta *= 100;
+
+	if (jdelta > MAX_TIMESTAMP_INTERVAL)
+		/* No data received for a while, resync the timestamp. */
+		return 0;
+	else
+		return td->timestamp + delta;
+}
+
 static int mt_touch_event(struct hid_device *hid, struct hid_field *field,
 				struct hid_usage *usage, __s32 value)
 {
@@ -787,6 +827,9 @@ static void mt_process_mt_event(struct hid_device *hid, struct hid_field *field,
 		case HID_DG_HEIGHT:
 			td->curdata.h = value;
 			break;
+		case HID_DG_SCANTIME:
+			td->timestamp = mt_compute_timestamp(td, field, value);
+			break;
 		case HID_DG_CONTACTCOUNT:
 			break;
 		case HID_DG_TOUCH:
@@ -1246,10 +1289,10 @@ static void mt_release_contacts(struct hid_device *hid)
 	td->num_received = 0;
 }
 
-static void mt_expired_timeout(unsigned long arg)
+static void mt_expired_timeout(struct timer_list *t)
 {
-	struct hid_device *hdev = (void *)arg;
-	struct mt_device *td = hid_get_drvdata(hdev);
+	struct mt_device *td = from_timer(td, t, release_timer);
+	struct hid_device *hdev = td->hdev;
 
 	/*
 	 * An input report came in just before we release the sticky fingers,
@@ -1280,6 +1323,7 @@ static int mt_probe(struct hid_device *hdev, const struct hid_device_id *id)
 		dev_err(&hdev->dev, "cannot allocate multitouch data\n");
 		return -ENOMEM;
 	}
+	td->hdev = hdev;
 	td->mtclass = *mtclass;
 	td->inputmode = -1;
 	td->maxcontact_report_id = -1;
@@ -1331,7 +1375,7 @@ static int mt_probe(struct hid_device *hdev, const struct hid_device_id *id)
 	 */
 	hdev->quirks |= HID_QUIRK_NO_INIT_REPORTS;
 
-	setup_timer(&td->release_timer, mt_expired_timeout, (long)hdev);
+	timer_setup(&td->release_timer, mt_expired_timeout, 0);
 
 	ret = hid_parse(hdev);
 	if (ret != 0)