diff options
| -rw-r--r-- | drivers/hid/hid-ntrig.c | 222 |
1 files changed, 211 insertions, 11 deletions
diff --git a/drivers/hid/hid-ntrig.c b/drivers/hid/hid-ntrig.c index c5b252be9c21..75ed9d2c1a36 100644 --- a/drivers/hid/hid-ntrig.c +++ b/drivers/hid/hid-ntrig.c @@ -1,13 +1,8 @@ /* - * HID driver for some ntrig "special" devices + * HID driver for N-Trig touchscreens * - * Copyright (c) 1999 Andreas Gal - * Copyright (c) 2000-2005 Vojtech Pavlik <vojtech@suse.cz> - * Copyright (c) 2005 Michael Haboustak <mike-@cinci.rr.com> for Concept2, Inc - * Copyright (c) 2006-2007 Jiri Kosina - * Copyright (c) 2007 Paul Walmsley - * Copyright (c) 2008 Jiri Slaby * Copyright (c) 2008 Rafi Rubin + * Copyright (c) 2009 Stephane Chatty * */ @@ -29,15 +24,79 @@ #define nt_map_key_clear(c) hid_map_usage_clear(hi, usage, bit, max, \ EV_KEY, (c)) +struct ntrig_data { + __s32 x, y, id, w, h; + char reading_a_point, found_contact_id; +}; + +/* + * this driver is aimed at two firmware versions in circulation: + * - dual pen/finger single touch + * - finger multitouch, pen not working + */ + static int ntrig_input_mapping(struct hid_device *hdev, struct hid_input *hi, struct hid_field *field, struct hid_usage *usage, unsigned long **bit, int *max) { - if ((usage->hid & HID_USAGE_PAGE) == HID_UP_DIGITIZER && - (usage->hid & 0xff) == 0x47) { - nt_map_key_clear(BTN_TOOL_DOUBLETAP); - return 1; + 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); + 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); + 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) { + /* we do not want to map these for now */ + case HID_DG_INVERT: /* value is always 0 */ + case HID_DG_ERASER: /* value is always 0 */ + case HID_DG_CONTACTID: /* value is useless */ + case HID_DG_BARRELSWITCH: /* doubtful */ + case HID_DG_INPUTMODE: + case HID_DG_DEVICEINDEX: + case HID_DG_CONTACTCOUNT: + case HID_DG_CONTACTMAX: + return -1; + + /* original mapping by Rafi Rubin */ + case HID_DG_CONFIDENCE: + nt_map_key_clear(BTN_TOOL_DOUBLETAP); + return 1; + + /* width/height mapped on TouchMajor/TouchMinor/Orientation */ + case HID_DG_WIDTH: + hid_map_usage(hi, usage, bit, max, + EV_ABS, ABS_MT_TOUCH_MAJOR); + return 1; + case HID_DG_HEIGHT: + hid_map_usage(hi, usage, bit, max, + EV_ABS, ABS_MT_TOUCH_MINOR); + input_set_abs_params(hi->input, ABS_MT_ORIENTATION, + 0, 1, 0, 0); + return 1; + } + return 0; + + case 0xff000000: + /* we do not want to map these: no input-oriented meaning */ + return -1; } + return 0; } @@ -51,6 +110,138 @@ static int ntrig_input_mapped(struct hid_device *hdev, struct hid_input *hi, return 0; } + +/* + * this function is called upon all reports + * so that we can filter contact point information, + * decide whether we are in multi or single touch mode + * and call input_mt_sync after each point if necessary + */ +static int ntrig_event (struct hid_device *hid, struct hid_field *field, + struct hid_usage *usage, __s32 value) +{ + struct input_dev *input = field->hidinput->input; + struct ntrig_data *nd = hid_get_drvdata(hid); + + if (hid->claimed & HID_CLAIMED_INPUT) { + switch (usage->hid) { + case HID_GD_X: + nd->x = value; + nd->reading_a_point = 1; + break; + case HID_GD_Y: + nd->y = value; + break; + case HID_DG_CONTACTID: + nd->id = value; + /* we receive this only when in multitouch mode */ + nd->found_contact_id = 1; + break; + case HID_DG_WIDTH: + nd->w = value; + break; + case HID_DG_HEIGHT: + nd->h = value; + /* + * when in single touch mode, this is the last + * report received in a finger event. We want + * to emit a normal (X, Y) position + */ + if (! nd->found_contact_id) { + input_event(input, EV_ABS, ABS_X, nd->x); + input_event(input, EV_ABS, ABS_Y, nd->y); + } + break; + case HID_DG_TIPPRESSURE: + /* + * when in single touch mode, this is the last + * report received in a pen event. We want + * to emit a normal (X, Y) position + */ + if (! nd->found_contact_id) { + input_event(input, EV_ABS, ABS_X, nd->x); + input_event(input, EV_ABS, ABS_Y, nd->y); + input_event(input, EV_ABS, ABS_PRESSURE, value); + } + break; + case 0xff000002: + /* + * we receive this when the device is in multitouch + * mode. The first of the three values tagged with + * this usage tells if the contact point is real + * or a placeholder + */ + if (!nd->reading_a_point || value != 1) + break; + /* emit a normal (X, Y) for the first point only */ + if (nd->id == 0) { + input_event(input, EV_ABS, ABS_X, nd->x); + input_event(input, EV_ABS, ABS_Y, nd->y); + } + input_event(input, EV_ABS, ABS_MT_POSITION_X, nd->x); + input_event(input, EV_ABS, ABS_MT_POSITION_Y, nd->y); + if (nd->w > nd->h) { + input_event(input, EV_ABS, + ABS_MT_ORIENTATION, 1); + input_event(input, EV_ABS, + ABS_MT_TOUCH_MAJOR, nd->w); + input_event(input, EV_ABS, + ABS_MT_TOUCH_MINOR, nd->h); + } else { + input_event(input, EV_ABS, + ABS_MT_ORIENTATION, 0); + input_event(input, EV_ABS, + ABS_MT_TOUCH_MAJOR, nd->h); + input_event(input, EV_ABS, + ABS_MT_TOUCH_MINOR, nd->w); + } + input_mt_sync(field->hidinput->input); + nd->reading_a_point = 0; + nd->found_contact_id = 0; + 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 ntrig_probe(struct hid_device *hdev, const struct hid_device_id *id) +{ + int ret; + struct ntrig_data *nd; + + nd = kmalloc(sizeof(struct ntrig_data), GFP_KERNEL); + if (!nd) { + dev_err(&hdev->dev, "cannot allocate N-Trig data\n"); + return -ENOMEM; + } + nd->reading_a_point = 0; + nd->found_contact_id = 0; + hid_set_drvdata(hdev, nd); + + ret = hid_parse(hdev); + if (!ret) + ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT); + + if (ret) + kfree (nd); + return ret; +} + +static void ntrig_remove(struct hid_device *hdev) +{ + hid_hw_stop(hdev); + kfree(hid_get_drvdata(hdev)); +} + static const struct hid_device_id ntrig_devices[] = { { HID_USB_DEVICE(USB_VENDOR_ID_NTRIG, USB_DEVICE_ID_NTRIG_TOUCH_SCREEN), .driver_data = NTRIG_DUPLICATE_USAGES }, @@ -58,11 +249,20 @@ static const struct hid_device_id ntrig_devices[] = { }; MODULE_DEVICE_TABLE(hid, ntrig_devices); +static const struct hid_usage_id ntrig_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 ntrig_driver = { .name = "ntrig", .id_table = ntrig_devices, + .probe = ntrig_probe, + .remove = ntrig_remove, .input_mapping = ntrig_input_mapping, .input_mapped = ntrig_input_mapped, + .usage_table = ntrig_grabbed_usages, + .event = ntrig_event, }; static int ntrig_init(void) |