hid-input.c

linux 内核源代码

				case 0x04a: map_key_clear(KEY_VIDEO);		break;
				case 0x04b: map_key_clear(KEY_ANGLE);		break;
				case 0x04c: map_key_clear(KEY_LANGUAGE);	break;
				case 0x04d: map_key_clear(KEY_SUBTITLE);	break;
				case 0x051: map_key_clear(KEY_RED);		break;
				case 0x052: map_key_clear(KEY_CLOSE);		break;

				/* Reported on Petalynx Maxter remote */
				case 0x05a: map_key_clear(KEY_TEXT);		break;
				case 0x05b: map_key_clear(KEY_RED);		break;
				case 0x05c: map_key_clear(KEY_GREEN);		break;
				case 0x05d: map_key_clear(KEY_YELLOW);		break;
				case 0x05e: map_key_clear(KEY_BLUE);		break;

				default:    goto ignore;
			}
			break;

		case HID_UP_PID:

			switch(usage->hid & HID_USAGE) {
				case 0xa4: map_key_clear(BTN_DEAD);	break;
				default: goto ignore;
			}
			break;

		default:
		unknown:
			if (field->report_size == 1) {
				if (field->report->type == HID_OUTPUT_REPORT) {
					map_led(LED_MISC);
					break;
				}
				map_key(BTN_MISC);
				break;
			}
			if (field->flags & HID_MAIN_ITEM_RELATIVE) {
				map_rel(REL_MISC);
				break;
			}
			map_abs(ABS_MISC);
			break;
	}

	if (device->quirks & HID_QUIRK_MIGHTYMOUSE) {
		if (usage->hid == HID_GD_Z)
			map_rel(REL_HWHEEL);
		else if (usage->code == BTN_1)
			map_key(BTN_2);
		else if (usage->code == BTN_2)
			map_key(BTN_1);
	}

	if ((device->quirks & (HID_QUIRK_2WHEEL_MOUSE_HACK_7 | HID_QUIRK_2WHEEL_MOUSE_HACK_5)) &&
		 (usage->type == EV_REL) && (usage->code == REL_WHEEL))
			set_bit(REL_HWHEEL, bit);

	if (((device->quirks & HID_QUIRK_2WHEEL_MOUSE_HACK_5) && (usage->hid == 0x00090005))
		|| ((device->quirks & HID_QUIRK_2WHEEL_MOUSE_HACK_7) && (usage->hid == 0x00090007)))
		goto ignore;

	if ((device->quirks & HID_QUIRK_BAD_RELATIVE_KEYS) &&
		usage->type == EV_KEY && (field->flags & HID_MAIN_ITEM_RELATIVE))
		field->flags &= ~HID_MAIN_ITEM_RELATIVE;

	set_bit(usage->type, input->evbit);

	if (device->quirks & HID_QUIRK_DUPLICATE_USAGES &&
			(usage->type == EV_KEY ||
			 usage->type == EV_REL ||
			 usage->type == EV_ABS))
		clear_bit(usage->code, bit);

	while (usage->code <= max && test_and_set_bit(usage->code, bit))
		usage->code = find_next_zero_bit(bit, max + 1, usage->code);

	if (usage->code > max)
		goto ignore;


	if (usage->type == EV_ABS) {

		int a = field->logical_minimum;
		int b = field->logical_maximum;

		if ((device->quirks & HID_QUIRK_BADPAD) && (usage->code == ABS_X || usage->code == ABS_Y)) {
			a = field->logical_minimum = 0;
			b = field->logical_maximum = 255;
		}

		if (field->application == HID_GD_GAMEPAD || field->application == HID_GD_JOYSTICK)
			input_set_abs_params(input, usage->code, a, b, (b - a) >> 8, (b - a) >> 4);
		else	input_set_abs_params(input, usage->code, a, b, 0, 0);

	}

	if (usage->type == EV_ABS &&
	    (usage->hat_min < usage->hat_max || usage->hat_dir)) {
		int i;
		for (i = usage->code; i < usage->code + 2 && i <= max; i++) {
			input_set_abs_params(input, i, -1, 1, 0, 0);
			set_bit(i, input->absbit);
		}
		if (usage->hat_dir && !field->dpad)
			field->dpad = usage->code;
	}

	/* for those devices which produce Consumer volume usage as relative,
	 * we emulate pressing volumeup/volumedown appropriate number of times
	 * in hidinput_hid_event()
	 */
	if ((usage->type == EV_ABS) && (field->flags & HID_MAIN_ITEM_RELATIVE) &&
			(usage->code == ABS_VOLUME)) {
		set_bit(KEY_VOLUMEUP, input->keybit);
		set_bit(KEY_VOLUMEDOWN, input->keybit);
	}

	if (usage->type == EV_KEY) {
		set_bit(EV_MSC, input->evbit);
		set_bit(MSC_SCAN, input->mscbit);
	}

	hid_resolv_event(usage->type, usage->code);

	dbg_hid_line("\n");

	return;

ignore:
	dbg_hid_line("IGNORED\n");
	return;
}

void hidinput_hid_event(struct hid_device *hid, struct hid_field *field, struct hid_usage *usage, __s32 value)
{
	struct input_dev *input;
	unsigned *quirks = &hid->quirks;

	if (!field->hidinput)
		return;

	input = field->hidinput->input;

	if (!usage->type)
		return;

	if (((hid->quirks & HID_QUIRK_2WHEEL_MOUSE_HACK_5) && (usage->hid == 0x00090005))
		|| ((hid->quirks & HID_QUIRK_2WHEEL_MOUSE_HACK_7) && (usage->hid == 0x00090007))) {
		if (value) hid->quirks |=  HID_QUIRK_2WHEEL_MOUSE_HACK_ON;
		else       hid->quirks &= ~HID_QUIRK_2WHEEL_MOUSE_HACK_ON;
		return;
	}

	if ((hid->quirks & HID_QUIRK_INVERT_HWHEEL) && (usage->code == REL_HWHEEL)) {
		input_event(input, usage->type, usage->code, -value);
		return;
	}

	if ((hid->quirks & HID_QUIRK_2WHEEL_MOUSE_HACK_ON) && (usage->code == REL_WHEEL)) {
		input_event(input, usage->type, REL_HWHEEL, value);
		return;
	}

	if ((hid->quirks & HID_QUIRK_POWERBOOK_HAS_FN) && hidinput_pb_event(hid, input, usage, value))
		return;

	if (usage->hat_min < usage->hat_max || usage->hat_dir) {
		int hat_dir = usage->hat_dir;
		if (!hat_dir)
			hat_dir = (value - usage->hat_min) * 8 / (usage->hat_max - usage->hat_min + 1) + 1;
		if (hat_dir < 0 || hat_dir > 8) hat_dir = 0;
		input_event(input, usage->type, usage->code    , hid_hat_to_axis[hat_dir].x);
                input_event(input, usage->type, usage->code + 1, hid_hat_to_axis[hat_dir].y);
                return;
        }

	if (usage->hid == (HID_UP_DIGITIZER | 0x003c)) { /* Invert */
		*quirks = value ? (*quirks | HID_QUIRK_INVERT) : (*quirks & ~HID_QUIRK_INVERT);
		return;
	}

	if (usage->hid == (HID_UP_DIGITIZER | 0x0032)) { /* InRange */
		if (value) {
			input_event(input, usage->type, (*quirks & HID_QUIRK_INVERT) ? BTN_TOOL_RUBBER : usage->code, 1);
			return;
		}
		input_event(input, usage->type, usage->code, 0);
		input_event(input, usage->type, BTN_TOOL_RUBBER, 0);
		return;
	}

	if (usage->hid == (HID_UP_DIGITIZER | 0x0030) && (*quirks & HID_QUIRK_NOTOUCH)) { /* Pressure */
		int a = field->logical_minimum;
		int b = field->logical_maximum;
		input_event(input, EV_KEY, BTN_TOUCH, value > a + ((b - a) >> 3));
	}

	if (usage->hid == (HID_UP_PID | 0x83UL)) { /* Simultaneous Effects Max */
		dbg_hid("Maximum Effects - %d\n",value);
		return;
	}

	if (usage->hid == (HID_UP_PID | 0x7fUL)) {
		dbg_hid("PID Pool Report\n");
		return;
	}

	if ((usage->type == EV_KEY) && (usage->code == 0)) /* Key 0 is "unassigned", not KEY_UNKNOWN */
		return;

	if ((usage->type == EV_ABS) && (field->flags & HID_MAIN_ITEM_RELATIVE) &&
			(usage->code == ABS_VOLUME)) {
		int count = abs(value);
		int direction = value > 0 ? KEY_VOLUMEUP : KEY_VOLUMEDOWN;
		int i;

		for (i = 0; i < count; i++) {
			input_event(input, EV_KEY, direction, 1);
			input_sync(input);
			input_event(input, EV_KEY, direction, 0);
			input_sync(input);
		}
		return;
	}

	/* Handling MS keyboards special buttons */
	if (IS_MS_KB(hid) && usage->hid == (HID_UP_MSVENDOR | 0xff05)) {
		int key = 0;
		static int last_key = 0;
		switch (value) {
			case 0x01: key = KEY_F14; break;
			case 0x02: key = KEY_F15; break;
			case 0x04: key = KEY_F16; break;
			case 0x08: key = KEY_F17; break;
			case 0x10: key = KEY_F18; break;
			default: break;
		}
		if (key) {
			input_event(input, usage->type, key, 1);
			last_key = key;
		} else {
			input_event(input, usage->type, last_key, 0);
		}
	}
	/* report the usage code as scancode if the key status has changed */
	if (usage->type == EV_KEY && !!test_bit(usage->code, input->key) != value)
		input_event(input, EV_MSC, MSC_SCAN, usage->hid);

	input_event(input, usage->type, usage->code, value);

	if ((field->flags & HID_MAIN_ITEM_RELATIVE) && (usage->type == EV_KEY))
		input_event(input, usage->type, usage->code, 0);
}

void hidinput_report_event(struct hid_device *hid, struct hid_report *report)
{
	struct hid_input *hidinput;

	list_for_each_entry(hidinput, &hid->inputs, list)
		input_sync(hidinput->input);
}
EXPORT_SYMBOL_GPL(hidinput_report_event);

int hidinput_find_field(struct hid_device *hid, unsigned int type, unsigned int code, struct hid_field **field)
{
	struct hid_report *report;
	int i, j;

	list_for_each_entry(report, &hid->report_enum[HID_OUTPUT_REPORT].report_list, list) {
		for (i = 0; i < report->maxfield; i++) {
			*field = report->field[i];
			for (j = 0; j < (*field)->maxusage; j++)
				if ((*field)->usage[j].type == type && (*field)->usage[j].code == code)
					return j;
		}
	}
	return -1;
}
EXPORT_SYMBOL_GPL(hidinput_find_field);

static int hidinput_open(struct input_dev *dev)
{
	struct hid_device *hid = input_get_drvdata(dev);

	return hid->hid_open(hid);
}

static void hidinput_close(struct input_dev *dev)
{
	struct hid_device *hid = input_get_drvdata(dev);

	hid->hid_close(hid);
}

/*
 * Register the input device; print a message.
 * Configure the input layer interface
 * Read all reports and initialize the absolute field values.
 */

int hidinput_connect(struct hid_device *hid)
{
	struct hid_report *report;
	struct hid_input *hidinput = NULL;
	struct input_dev *input_dev;
	int i, j, k;
	int max_report_type = HID_OUTPUT_REPORT;

	if (hid->quirks & HID_QUIRK_IGNORE_HIDINPUT)
		return -1;

	INIT_LIST_HEAD(&hid->inputs);

	for (i = 0; i < hid->maxcollection; i++)
		if (hid->collection[i].type == HID_COLLECTION_APPLICATION ||
		    hid->collection[i].type == HID_COLLECTION_PHYSICAL)
			if (IS_INPUT_APPLICATION(hid->collection[i].usage))
				break;

	if (i == hid->maxcollection && (hid->quirks & HID_QUIRK_HIDINPUT) == 0)
		return -1;

	if (hid->quirks & HID_QUIRK_SKIP_OUTPUT_REPORTS)
		max_report_type = HID_INPUT_REPORT;

	for (k = HID_INPUT_REPORT; k <= max_report_type; k++)
		list_for_each_entry(report, &hid->report_enum[k].report_list, list) {

			if (!report->maxfield)
				continue;

			if (!hidinput) {
				hidinput = kzalloc(sizeof(*hidinput), GFP_KERNEL);
				input_dev = input_allocate_device();
				if (!hidinput || !input_dev) {
					kfree(hidinput);
					input_free_device(input_dev);
					err_hid("Out of memory during hid input probe");
					goto out_unwind;
				}

				input_set_drvdata(input_dev, hid);
				input_dev->event = hid->hidinput_input_event;
				input_dev->open = hidinput_open;
				input_dev->close = hidinput_close;
				input_dev->setkeycode = hidinput_setkeycode;
				input_dev->getkeycode = hidinput_getkeycode;

				input_dev->name = hid->name;
				input_dev->phys = hid->phys;
				input_dev->uniq = hid->uniq;
				input_dev->id.bustype = hid->bus;
				input_dev->id.vendor  = hid->vendor;
				input_dev->id.product = hid->product;
				input_dev->id.version = hid->version;
				input_dev->dev.parent = hid->dev;
				hidinput->input = input_dev;
				list_add_tail(&hidinput->list, &hid->inputs);
			}

			for (i = 0; i < report->maxfield; i++)
				for (j = 0; j < report->field[i]->maxusage; j++)
					hidinput_configure_usage(hidinput, report->field[i],
								 report->field[i]->usage + j);

			if (hid->quirks & HID_QUIRK_MULTI_INPUT) {
				/* This will leave hidinput NULL, so that it
				 * allocates another one if we have more inputs on
				 * the same interface. Some devices (e.g. Happ's
				 * UGCI) cram a lot of unrelated inputs into the
				 * same interface. */
				hidinput->report = report;
				if (input_register_device(hidinput->input))
					goto out_cleanup;
				hidinput = NULL;
			}
		}

	if (hidinput && input_register_device(hidinput->input))
		goto out_cleanup;

	return 0;

out_cleanup:
	input_free_device(hidinput->input);
	kfree(hidinput);
out_unwind:
	/* unwind the ones we already registered */
	hidinput_disconnect(hid);

	return -1;
}
EXPORT_SYMBOL_GPL(hidinput_connect);

void hidinput_disconnect(struct hid_device *hid)
{
	struct hid_input *hidinput, *next;

	list_for_each_entry_safe(hidinput, next, &hid->inputs, list) {
		list_del(&hidinput->list);
		input_unregister_device(hidinput->input);
		kfree(hidinput);
	}
}
EXPORT_SYMBOL_GPL(hidinput_disconnect);