hid-input.c

优龙2410linux2.6.8内核源代码

				           set_bit(FF_PERIODIC, input->ffbit); break;
				case 0x40: set_bit(FF_SPRING,   input->ffbit); break;
				case 0x41: set_bit(FF_DAMPER,   input->ffbit); break;
				case 0x42: set_bit(FF_INERTIA , input->ffbit); break;
				case 0x43: set_bit(FF_FRICTION, input->ffbit); break;
				case 0x7e: usage->code = FF_GAIN;       break;
				case 0x83:  /* Simultaneous Effects Max */
					input->ff_effects_max = (field->value[0]);
					dbg("Maximum Effects - %d",input->ff_effects_max);
					break;
				case 0x98:  /* Device Control */
					usage->code = FF_AUTOCENTER;    break;
				case 0xa4:  /* Safety Switch */
					usage->code = BTN_DEAD;
					bit = input->keybit;
					usage->type = EV_KEY;
					max = KEY_MAX;
					dbg("Safety Switch Report\n");
					break;
				case 0x9f: /* Device Paused */
				case 0xa0: /* Actuators Enabled */
					dbg("Not telling the input API about ");
					resolv_usage(usage->hid);
					return;
			}
			break;
		default:
		unknown:
			resolv_usage(usage->hid);

			if (field->report_size == 1) {

				if (field->report->type == HID_OUTPUT_REPORT) {
					usage->code = LED_MISC;
					usage->type = EV_LED; bit = input->ledbit; max = LED_MAX;
					break;
				}

				usage->code = BTN_MISC;
				usage->type = EV_KEY; bit = input->keybit; max = KEY_MAX;
				break;
			}

			if (field->flags & HID_MAIN_ITEM_RELATIVE) {
				usage->code = REL_MISC;
				usage->type = EV_REL; bit = input->relbit; max = REL_MAX;
				break;
			}

			usage->code = ABS_MISC;
			usage->type = EV_ABS; bit = input->absbit; max = ABS_MAX;
			break;
	}

	set_bit(usage->type, input->evbit);
	if ((usage->type == EV_REL)
			&& (device->quirks & (HID_QUIRK_2WHEEL_MOUSE_HACK_BACK
				| HID_QUIRK_2WHEEL_MOUSE_HACK_EXTRA))
			&& (usage->code == REL_WHEEL)) {
		set_bit(REL_HWHEEL, 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)
		return;

	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;
		}
		
		input->absmin[usage->code] = a;
		input->absmax[usage->code] = b;
		input->absfuzz[usage->code] = 0;
		input->absflat[usage->code] = 0;

		if (field->application == HID_GD_GAMEPAD || field->application == HID_GD_JOYSTICK) {
			input->absfuzz[usage->code] = (b - a) >> 8;
			input->absflat[usage->code] = (b - a) >> 4;
		}
	}

	if (usage->hat_min != usage->hat_max) {
		int i;
		for (i = usage->code; i < usage->code + 2 && i <= max; i++) {
			input->absmax[i] = 1;
			input->absmin[i] = -1;
			input->absfuzz[i] = 0;
			input->absflat[i] = 0;
		}
		set_bit(usage->code + 1, input->absbit);
	}
}

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

	if (!input)
		return;

	input_regs(input, regs);

	if (((hid->quirks & HID_QUIRK_2WHEEL_MOUSE_HACK_EXTRA) && (usage->code == BTN_EXTRA))
		|| ((hid->quirks & HID_QUIRK_2WHEEL_MOUSE_HACK_BACK) && (usage->code == BTN_BACK))) {
		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_2WHEEL_MOUSE_HACK_ON)
			&& (usage->code == REL_WHEEL)) {
		input_event(input, usage->type, REL_HWHEEL, value);
		return;
	}

	if (usage->hat_min != usage->hat_max ) { /* FIXME: hat_max can be 0 and hat_min 1 */
		value = (value - usage->hat_min) * 8 / (usage->hat_max - usage->hat_min + 1) + 1;
		if (value < 0 || value > 8) value = 0;
		input_event(input, usage->type, usage->code    , hid_hat_to_axis[value].x);
		input_event(input, usage->type, usage->code + 1, hid_hat_to_axis[value].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 */
		input->ff_effects_max = value;
		dbg("Maximum Effects - %d",input->ff_effects_max);
		return;
	}
	if (usage->hid == (HID_UP_PID | 0x7fUL)) {
		dbg("PID Pool Report\n");
		return;
	}

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

	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 list_head *lh;
	struct hid_input *hidinput;

	list_for_each (lh, &hid->inputs) {
		hidinput = list_entry(lh, struct hid_input, list);
		input_sync(&hidinput->input);
	}
}

static int hidinput_input_event(struct input_dev *dev, unsigned int type, unsigned int code, int value)
{
	struct hid_device *hid = dev->private;
	struct hid_field *field = NULL;
	int offset;

	if (type == EV_FF)
		return hid_ff_event(hid, dev, type, code, value);

	if ((offset = hid_find_field(hid, type, code, &field)) == -1) {
		warn("event field not found");
		return -1;
	}

	hid_set_field(field, offset, value);
	hid_submit_report(hid, field->report, USB_DIR_OUT);

	return 0;
}

static int hidinput_open(struct input_dev *dev)
{
	struct hid_device *hid = dev->private;
	return hid_open(hid);
}

static void hidinput_close(struct input_dev *dev)
{
	struct hid_device *hid = dev->private;
	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 usb_device *dev = hid->dev;
	struct hid_report_enum *report_enum;
	struct hid_report *report;
	struct list_head *list;
	struct hid_input *hidinput = NULL;
	int i, j, k;

	INIT_LIST_HEAD(&hid->inputs);

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

	if (i == hid->maxcollection)
		return -1;

	for (k = HID_INPUT_REPORT; k <= HID_OUTPUT_REPORT; k++) {
		report_enum = hid->report_enum + k;
		list = report_enum->report_list.next;
		while (list != &report_enum->report_list) {
			report = (struct hid_report *) list;

			if (!report->maxfield) {
				list = list->next;
				continue;
			}

			if (!hidinput) {
				hidinput = kmalloc(sizeof(*hidinput), GFP_KERNEL);
				if (!hidinput) {
					err("Out of memory during hid input probe");
					return -1;
				}
				memset(hidinput, 0, sizeof(*hidinput));

				list_add_tail(&hidinput->list, &hid->inputs);

				hidinput->input.private = hid;
				hidinput->input.event = hidinput_input_event;
				hidinput->input.open = hidinput_open;
				hidinput->input.close = hidinput_close;

				hidinput->input.name = hid->name;
				hidinput->input.phys = hid->phys;
				hidinput->input.uniq = hid->uniq;
				hidinput->input.id.bustype = BUS_USB;
				hidinput->input.id.vendor = dev->descriptor.idVendor;
				hidinput->input.id.product = dev->descriptor.idProduct;
				hidinput->input.id.version = dev->descriptor.bcdDevice;
				hidinput->input.dev = &hid->intf->dev;
			}

			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;
				input_register_device(&hidinput->input);
				hidinput = NULL;
			}

			list = list->next;
		}
	}

	/* This only gets called when we are a single-input (most of the
	 * time). IOW, not a HID_QUIRK_MULTI_INPUT. The hid_ff_init() is
	 * only useful in this case, and not for multi-input quirks. */
	if (hidinput) {
		hid_ff_init(hid);
		input_register_device(&hidinput->input);
	}

	return 0;
}

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

	list_for_each_safe (lh, next, &hid->inputs) {
		hidinput = list_entry(lh, struct hid_input, list);
		input_unregister_device(&hidinput->input);
		list_del(&hidinput->list);
		kfree(hidinput);
	}
}