From fa11aa72bd3c72d8129f433aaf6e1af7dd11fa3d Mon Sep 17 00:00:00 2001 From: Benjamin Tissoires Date: Fri, 22 Mar 2013 18:38:32 +0100 Subject: [PATCH] HID: multitouch: add handling for pen in dual-sensors device Dual sensors devices reports pen and touch on two different reports. Using the quirk HID_QUIRK_MULTI_INPUT allows us to create a new input device to forward pen events. The quirk HID_QUIRK_NO_EMPTY_INPUT avoids the creation of input devices for the not used mouse emulation present on Win7 certified devices. Since hid-multitouch sets the quirk HID_QUIRK_NO_INPUT_SYNC, we need to manually send SYN events for pen report too. Signed-off-by: Benjamin Tissoires Signed-off-by: Jiri Kosina --- drivers/hid/hid-multitouch.c | 66 +++++++++++++++++++++++++++++++++--- 1 file changed, 62 insertions(+), 4 deletions(-) diff --git a/drivers/hid/hid-multitouch.c b/drivers/hid/hid-multitouch.c index 6a934dee1b82..099a7ada13c7 100644 --- a/drivers/hid/hid-multitouch.c +++ b/drivers/hid/hid-multitouch.c @@ -99,6 +99,7 @@ struct mt_device { int cc_value_index; /* contact count value index in the field */ 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, @@ -367,6 +368,43 @@ static void mt_store_field(struct hid_usage *usage, struct mt_device *td, f->usages[f->length++] = usage->hid; } +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) +{ +} + 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) @@ -740,14 +778,12 @@ static int mt_input_mapping(struct hid_device *hdev, struct hid_input *hi, * 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; - /* 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; + return mt_pen_input_mapping(hdev, hi, field, usage, bit, max); return mt_touch_input_mapping(hdev, hi, field, usage, bit, max); } @@ -756,6 +792,9 @@ 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); } @@ -767,6 +806,9 @@ static int mt_event(struct hid_device *hid, struct hid_field *field, 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; } @@ -780,6 +822,9 @@ static void mt_report(struct hid_device *hid, struct hid_report *report) 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) @@ -861,6 +906,9 @@ static void mt_input_configured(struct hid_device *hdev, struct hid_input *hi) if (hi->report->id == td->mt_report_id) mt_touch_input_configured(hdev, hi); + + 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) @@ -881,6 +929,14 @@ static int mt_probe(struct hid_device *hdev, const struct hid_device_id *id) */ 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"); @@ -890,6 +946,8 @@ static int mt_probe(struct hid_device *hdev, const struct hid_device_id *id) 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); -- 2.34.1