wacom_sys.c 31.6 KB
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/*
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 * drivers/input/tablet/wacom_sys.c
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 *
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 *  USB Wacom tablet support - system specific code
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 */

/*
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 */

#include "wacom_wac.h"
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#include "wacom.h"
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/* defines to get HID report descriptor */
#define HID_DEVICET_HID		(USB_TYPE_CLASS | 0x01)
#define HID_DEVICET_REPORT	(USB_TYPE_CLASS | 0x02)
#define HID_USAGE_UNDEFINED		0x00
#define HID_USAGE_PAGE			0x05
#define HID_USAGE_PAGE_DIGITIZER	0x0d
#define HID_USAGE_PAGE_DESKTOP		0x01
#define HID_USAGE			0x09
#define HID_USAGE_X			0x30
#define HID_USAGE_Y			0x31
#define HID_USAGE_X_TILT		0x3d
#define HID_USAGE_Y_TILT		0x3e
#define HID_USAGE_FINGER		0x22
#define HID_USAGE_STYLUS		0x20
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#define HID_USAGE_CONTACTMAX		0x55
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#define HID_COLLECTION			0xa1
#define HID_COLLECTION_LOGICAL		0x02
#define HID_COLLECTION_END		0xc0
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enum {
	WCM_UNDEFINED = 0,
	WCM_DESKTOP,
	WCM_DIGITIZER,
};

struct hid_descriptor {
	struct usb_descriptor_header header;
	__le16   bcdHID;
	u8       bCountryCode;
	u8       bNumDescriptors;
	u8       bDescriptorType;
	__le16   wDescriptorLength;
} __attribute__ ((packed));

/* defines to get/set USB message */
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#define USB_REQ_GET_REPORT	0x01
#define USB_REQ_SET_REPORT	0x09
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#define WAC_HID_FEATURE_REPORT	0x03
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#define WAC_MSG_RETRIES		5
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#define WAC_CMD_LED_CONTROL	0x20
#define WAC_CMD_ICON_START	0x21
#define WAC_CMD_ICON_XFER	0x23
#define WAC_CMD_RETRIES		10

static int wacom_get_report(struct usb_interface *intf, u8 type, u8 id,
			    void *buf, size_t size, unsigned int retries)
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{
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	struct usb_device *dev = interface_to_usbdev(intf);
	int retval;

	do {
		retval = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
				USB_REQ_GET_REPORT,
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				USB_DIR_IN | USB_TYPE_CLASS |
				USB_RECIP_INTERFACE,
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				(type << 8) + id,
				intf->altsetting[0].desc.bInterfaceNumber,
				buf, size, 100);
	} while ((retval == -ETIMEDOUT || retval == -EPIPE) && --retries);

	return retval;
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}

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static int wacom_set_report(struct usb_interface *intf, u8 type, u8 id,
			    void *buf, size_t size, unsigned int retries)
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{
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	struct usb_device *dev = interface_to_usbdev(intf);
	int retval;

	do {
		retval = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
				USB_REQ_SET_REPORT,
				USB_TYPE_CLASS | USB_RECIP_INTERFACE,
				(type << 8) + id,
				intf->altsetting[0].desc.bInterfaceNumber,
				buf, size, 1000);
	} while ((retval == -ETIMEDOUT || retval == -EPIPE) && --retries);

	return retval;
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}

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static void wacom_sys_irq(struct urb *urb)
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{
	struct wacom *wacom = urb->context;
	int retval;

	switch (urb->status) {
	case 0:
		/* success */
		break;
	case -ECONNRESET:
	case -ENOENT:
	case -ESHUTDOWN:
		/* this urb is terminated, clean up */
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		dbg("%s - urb shutting down with status: %d", __func__, urb->status);
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		return;
	default:
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		dbg("%s - nonzero urb status received: %d", __func__, urb->status);
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		goto exit;
	}

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	wacom_wac_irq(&wacom->wacom_wac, urb->actual_length);
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 exit:
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	usb_mark_last_busy(wacom->usbdev);
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	retval = usb_submit_urb(urb, GFP_ATOMIC);
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	if (retval)
		err ("%s - usb_submit_urb failed with result %d",
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		     __func__, retval);
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}

static int wacom_open(struct input_dev *dev)
{
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	struct wacom *wacom = input_get_drvdata(dev);
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	int retval = 0;
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	if (usb_autopm_get_interface(wacom->intf) < 0)
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		return -EIO;
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	mutex_lock(&wacom->lock);
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	if (usb_submit_urb(wacom->irq, GFP_KERNEL)) {
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		retval = -EIO;
		goto out;
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	}

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	wacom->open = true;
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	wacom->intf->needs_remote_wakeup = 1;
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out:
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	mutex_unlock(&wacom->lock);
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	usb_autopm_put_interface(wacom->intf);
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	return retval;
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}

static void wacom_close(struct input_dev *dev)
{
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	struct wacom *wacom = input_get_drvdata(dev);
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	int autopm_error;

	autopm_error = usb_autopm_get_interface(wacom->intf);
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	mutex_lock(&wacom->lock);
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	usb_kill_urb(wacom->irq);
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	wacom->open = false;
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	wacom->intf->needs_remote_wakeup = 0;
	mutex_unlock(&wacom->lock);
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	if (!autopm_error)
		usb_autopm_put_interface(wacom->intf);
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}

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/*
 * Static values for max X/Y and resolution of Pen interface is stored in
 * features. This mean physical size of active area can be computed.
 * This is useful to do when Pen and Touch have same active area of tablet.
 * This means for Touch device, we only need to find max X/Y value and we
 * have enough information to compute resolution of touch.
 */
static void wacom_set_phy_from_res(struct wacom_features *features)
{
	features->x_phy = (features->x_max * 100) / features->x_resolution;
	features->y_phy = (features->y_max * 100) / features->y_resolution;
}

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static int wacom_parse_logical_collection(unsigned char *report,
					  struct wacom_features *features)
{
	int length = 0;

	if (features->type == BAMBOO_PT) {

		/* Logical collection is only used by 3rd gen Bamboo Touch */
		features->pktlen = WACOM_PKGLEN_BBTOUCH3;
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		features->device_type = BTN_TOOL_FINGER;
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		wacom_set_phy_from_res(features);
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		features->x_max = features->y_max =
			get_unaligned_le16(&report[10]);

		length = 11;
	}
	return length;
}

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static void wacom_retrieve_report_data(struct usb_interface *intf,
				       struct wacom_features *features)
{
	int result = 0;
	unsigned char *rep_data;

	rep_data = kmalloc(2, GFP_KERNEL);
	if (rep_data) {

		rep_data[0] = 12;
		result = wacom_get_report(intf, WAC_HID_FEATURE_REPORT,
					  rep_data[0], &rep_data, 2,
					  WAC_MSG_RETRIES);

		if (result >= 0 && rep_data[1] > 2)
			features->touch_max = rep_data[1];

		kfree(rep_data);
	}
}

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/*
 * Interface Descriptor of wacom devices can be incomplete and
 * inconsistent so wacom_features table is used to store stylus
 * device's packet lengths, various maximum values, and tablet
 * resolution based on product ID's.
 *
 * For devices that contain 2 interfaces, wacom_features table is
 * inaccurate for the touch interface.  Since the Interface Descriptor
 * for touch interfaces has pretty complete data, this function exists
 * to query tablet for this missing information instead of hard coding in
 * an additional table.
 *
 * A typical Interface Descriptor for a stylus will contain a
 * boot mouse application collection that is not of interest and this
 * function will ignore it.
 *
 * It also contains a digitizer application collection that also is not
 * of interest since any information it contains would be duplicate
 * of what is in wacom_features. Usually it defines a report of an array
 * of bytes that could be used as max length of the stylus packet returned.
 * If it happens to define a Digitizer-Stylus Physical Collection then
 * the X and Y logical values contain valid data but it is ignored.
 *
 * A typical Interface Descriptor for a touch interface will contain a
 * Digitizer-Finger Physical Collection which will define both logical
 * X/Y maximum as well as the physical size of tablet. Since touch
 * interfaces haven't supported pressure or distance, this is enough
 * information to override invalid values in the wacom_features table.
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 *
 * 3rd gen Bamboo Touch no longer define a Digitizer-Finger Pysical
 * Collection. Instead they define a Logical Collection with a single
 * Logical Maximum for both X and Y.
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 *
 * Intuos5 touch interface does not contain useful data. We deal with
 * this after returning from this function.
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 */
static int wacom_parse_hid(struct usb_interface *intf,
			   struct hid_descriptor *hid_desc,
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			   struct wacom_features *features)
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{
	struct usb_device *dev = interface_to_usbdev(intf);
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	char limit = 0;
	/* result has to be defined as int for some devices */
	int result = 0;
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	int i = 0, usage = WCM_UNDEFINED, finger = 0, pen = 0;
	unsigned char *report;

	report = kzalloc(hid_desc->wDescriptorLength, GFP_KERNEL);
	if (!report)
		return -ENOMEM;

	/* retrive report descriptors */
	do {
		result = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
			USB_REQ_GET_DESCRIPTOR,
			USB_RECIP_INTERFACE | USB_DIR_IN,
			HID_DEVICET_REPORT << 8,
			intf->altsetting[0].desc.bInterfaceNumber, /* interface */
			report,
			hid_desc->wDescriptorLength,
			5000); /* 5 secs */
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	} while (result < 0 && limit++ < WAC_MSG_RETRIES);
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	/* No need to parse the Descriptor. It isn't an error though */
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	if (result < 0)
		goto out;

	for (i = 0; i < hid_desc->wDescriptorLength; i++) {

		switch (report[i]) {
		case HID_USAGE_PAGE:
			switch (report[i + 1]) {
			case HID_USAGE_PAGE_DIGITIZER:
				usage = WCM_DIGITIZER;
				i++;
				break;

			case HID_USAGE_PAGE_DESKTOP:
				usage = WCM_DESKTOP;
				i++;
				break;
			}
			break;

		case HID_USAGE:
			switch (report[i + 1]) {
			case HID_USAGE_X:
				if (usage == WCM_DESKTOP) {
					if (finger) {
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						features->device_type = BTN_TOOL_FINGER;
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						if (features->type == TABLETPC2FG) {
							/* need to reset back */
							features->pktlen = WACOM_PKGLEN_TPC2FG;
						}
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						if (features->type == MTSCREEN)
							features->pktlen = WACOM_PKGLEN_MTOUCH;

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						if (features->type == BAMBOO_PT) {
							/* need to reset back */
							features->pktlen = WACOM_PKGLEN_BBTOUCH;
							features->x_phy =
								get_unaligned_le16(&report[i + 5]);
							features->x_max =
								get_unaligned_le16(&report[i + 8]);
							i += 15;
						} else {
							features->x_max =
								get_unaligned_le16(&report[i + 3]);
							features->x_phy =
								get_unaligned_le16(&report[i + 6]);
							features->unit = report[i + 9];
							features->unitExpo = report[i + 11];
							i += 12;
						}
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					} else if (pen) {
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						/* penabled only accepts exact bytes of data */
						if (features->type == TABLETPC2FG)
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							features->pktlen = WACOM_PKGLEN_GRAPHIRE;
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						features->device_type = BTN_TOOL_PEN;
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						features->x_max =
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							get_unaligned_le16(&report[i + 3]);
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						i += 4;
					}
				}
				break;

			case HID_USAGE_Y:
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				if (usage == WCM_DESKTOP) {
					if (finger) {
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						int type = features->type;

						if (type == TABLETPC2FG || type == MTSCREEN) {
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							features->y_max =
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								get_unaligned_le16(&report[i + 3]);
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							features->y_phy =
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								get_unaligned_le16(&report[i + 6]);
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							i += 7;
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						} else if (type == BAMBOO_PT) {
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							features->y_phy =
								get_unaligned_le16(&report[i + 3]);
							features->y_max =
								get_unaligned_le16(&report[i + 6]);
							i += 12;
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						} else {
							features->y_max =
								features->x_max;
							features->y_phy =
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								get_unaligned_le16(&report[i + 3]);
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							i += 4;
						}
					} else if (pen) {
						features->y_max =
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							get_unaligned_le16(&report[i + 3]);
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						i += 4;
					}
				}
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				break;

			case HID_USAGE_FINGER:
				finger = 1;
				i++;
				break;

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			/*
			 * Requiring Stylus Usage will ignore boot mouse
			 * X/Y values and some cases of invalid Digitizer X/Y
			 * values commonly reported.
			 */
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			case HID_USAGE_STYLUS:
				pen = 1;
				i++;
				break;
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			case HID_USAGE_CONTACTMAX:
				wacom_retrieve_report_data(intf, features);
				i++;
				break;
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			}
			break;

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		case HID_COLLECTION_END:
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			/* reset UsagePage and Finger */
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			finger = usage = 0;
			break;
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		case HID_COLLECTION:
			i++;
			switch (report[i]) {
			case HID_COLLECTION_LOGICAL:
				i += wacom_parse_logical_collection(&report[i],
								    features);
				break;
			}
			break;
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		}
	}

 out:
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	result = 0;
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	kfree(report);
	return result;
}

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static int wacom_query_tablet_data(struct usb_interface *intf, struct wacom_features *features)
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{
	unsigned char *rep_data;
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	int limit = 0, report_id = 2;
	int error = -ENOMEM;
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	rep_data = kmalloc(4, GFP_KERNEL);
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	if (!rep_data)
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		return error;

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	/* ask to report Wacom data */
	if (features->device_type == BTN_TOOL_FINGER) {
		/* if it is an MT Tablet PC touch */
		if (features->type == TABLETPC2FG ||
		    features->type == MTSCREEN) {
			do {
				rep_data[0] = 3;
				rep_data[1] = 4;
				rep_data[2] = 0;
				rep_data[3] = 0;
				report_id = 3;
				error = wacom_set_report(intf,
							 WAC_HID_FEATURE_REPORT,
							 report_id,
							 rep_data, 4, 1);
				if (error >= 0)
					error = wacom_get_report(intf,
							WAC_HID_FEATURE_REPORT,
							report_id,
							rep_data, 4, 1);
			} while ((error < 0 || rep_data[1] != 4) &&
				 limit++ < WAC_MSG_RETRIES);
		}
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	} else if (features->type != TABLETPC &&
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		   features->type != WIRELESS &&
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		   features->device_type == BTN_TOOL_PEN) {
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		do {
			rep_data[0] = 2;
			rep_data[1] = 2;
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			error = wacom_set_report(intf, WAC_HID_FEATURE_REPORT,
						 report_id, rep_data, 2, 1);
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			if (error >= 0)
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				error = wacom_get_report(intf,
						WAC_HID_FEATURE_REPORT,
						report_id, rep_data, 2, 1);
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		} while ((error < 0 || rep_data[1] != 2) && limit++ < WAC_MSG_RETRIES);
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	}
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	kfree(rep_data);

	return error < 0 ? error : 0;
}

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static int wacom_retrieve_hid_descriptor(struct usb_interface *intf,
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					 struct wacom_features *features)
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{
	int error = 0;
	struct usb_host_interface *interface = intf->cur_altsetting;
	struct hid_descriptor *hid_desc;

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	/* default features */
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	features->device_type = BTN_TOOL_PEN;
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	features->x_fuzz = 4;
	features->y_fuzz = 4;
	features->pressure_fuzz = 0;
	features->distance_fuzz = 0;
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	/*
	 * The wireless device HID is basic and layout conflicts with
	 * other tablets (monitor and touch interface can look like pen).
	 * Skip the query for this type and modify defaults based on
	 * interface number.
	 */
	if (features->type == WIRELESS) {
		if (intf->cur_altsetting->desc.bInterfaceNumber == 0) {
			features->device_type = 0;
		} else if (intf->cur_altsetting->desc.bInterfaceNumber == 2) {
			features->device_type = BTN_TOOL_DOUBLETAP;
			features->pktlen = WACOM_PKGLEN_BBTOUCH3;
		}
	}

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	/* only devices that support touch need to retrieve the info */
	if (features->type != TABLETPC &&
	    features->type != TABLETPC2FG &&
	    features->type != BAMBOO_PT &&
	    features->type != MTSCREEN) {
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		goto out;
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	}
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	error = usb_get_extra_descriptor(interface, HID_DEVICET_HID, &hid_desc);
	if (error) {
		error = usb_get_extra_descriptor(&interface->endpoint[0],
						 HID_DEVICET_REPORT, &hid_desc);
		if (error) {
			printk(KERN_ERR "wacom: can not retrieve extra class descriptor\n");
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			goto out;
		}
	}
	error = wacom_parse_hid(intf, hid_desc, features);
	if (error)
		goto out;

 out:
	return error;
}

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struct wacom_usbdev_data {
	struct list_head list;
	struct kref kref;
	struct usb_device *dev;
	struct wacom_shared shared;
};

static LIST_HEAD(wacom_udev_list);
static DEFINE_MUTEX(wacom_udev_list_lock);

static struct wacom_usbdev_data *wacom_get_usbdev_data(struct usb_device *dev)
{
	struct wacom_usbdev_data *data;

	list_for_each_entry(data, &wacom_udev_list, list) {
		if (data->dev == dev) {
			kref_get(&data->kref);
			return data;
		}
	}

	return NULL;
}

static int wacom_add_shared_data(struct wacom_wac *wacom,
				 struct usb_device *dev)
{
	struct wacom_usbdev_data *data;
	int retval = 0;

	mutex_lock(&wacom_udev_list_lock);

	data = wacom_get_usbdev_data(dev);
	if (!data) {
		data = kzalloc(sizeof(struct wacom_usbdev_data), GFP_KERNEL);
		if (!data) {
			retval = -ENOMEM;
			goto out;
		}

		kref_init(&data->kref);
		data->dev = dev;
		list_add_tail(&data->list, &wacom_udev_list);
	}

	wacom->shared = &data->shared;

out:
	mutex_unlock(&wacom_udev_list_lock);
	return retval;
}

static void wacom_release_shared_data(struct kref *kref)
{
	struct wacom_usbdev_data *data =
		container_of(kref, struct wacom_usbdev_data, kref);

	mutex_lock(&wacom_udev_list_lock);
	list_del(&data->list);
	mutex_unlock(&wacom_udev_list_lock);

	kfree(data);
}

static void wacom_remove_shared_data(struct wacom_wac *wacom)
{
	struct wacom_usbdev_data *data;

	if (wacom->shared) {
		data = container_of(wacom->shared, struct wacom_usbdev_data, shared);
		kref_put(&data->kref, wacom_release_shared_data);
		wacom->shared = NULL;
	}
}

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static int wacom_led_control(struct wacom *wacom)
{
	unsigned char *buf;
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	int retval;
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	buf = kzalloc(9, GFP_KERNEL);
	if (!buf)
		return -ENOMEM;

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	if (wacom->wacom_wac.features.type >= INTUOS5S &&
	    wacom->wacom_wac.features.type <= INTUOS5L)	{
		/*
		 * Touch Ring and crop mark LED luminance may take on
		 * one of four values:
		 *    0 = Low; 1 = Medium; 2 = High; 3 = Off
		 */
		int ring_led = wacom->led.select[0] & 0x03;
		int ring_lum = (((wacom->led.llv & 0x60) >> 5) - 1) & 0x03;
		int crop_lum = 0;

		buf[0] = WAC_CMD_LED_CONTROL;
		buf[1] = (crop_lum << 4) | (ring_lum << 2) | (ring_led);
	}
	else {
		int led = wacom->led.select[0] | 0x4;

		if (wacom->wacom_wac.features.type == WACOM_21UX2 ||
		    wacom->wacom_wac.features.type == WACOM_24HD)
			led |= (wacom->led.select[1] << 4) | 0x40;

		buf[0] = WAC_CMD_LED_CONTROL;
		buf[1] = led;
		buf[2] = wacom->led.llv;
		buf[3] = wacom->led.hlv;
		buf[4] = wacom->led.img_lum;
	}
648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695

	retval = wacom_set_report(wacom->intf, 0x03, WAC_CMD_LED_CONTROL,
				  buf, 9, WAC_CMD_RETRIES);
	kfree(buf);

	return retval;
}

static int wacom_led_putimage(struct wacom *wacom, int button_id, const void *img)
{
	unsigned char *buf;
	int i, retval;

	buf = kzalloc(259, GFP_KERNEL);
	if (!buf)
		return -ENOMEM;

	/* Send 'start' command */
	buf[0] = WAC_CMD_ICON_START;
	buf[1] = 1;
	retval = wacom_set_report(wacom->intf, 0x03, WAC_CMD_ICON_START,
				  buf, 2, WAC_CMD_RETRIES);
	if (retval < 0)
		goto out;

	buf[0] = WAC_CMD_ICON_XFER;
	buf[1] = button_id & 0x07;
	for (i = 0; i < 4; i++) {
		buf[2] = i;
		memcpy(buf + 3, img + i * 256, 256);

		retval = wacom_set_report(wacom->intf, 0x03, WAC_CMD_ICON_XFER,
					  buf, 259, WAC_CMD_RETRIES);
		if (retval < 0)
			break;
	}

	/* Send 'stop' */
	buf[0] = WAC_CMD_ICON_START;
	buf[1] = 0;
	wacom_set_report(wacom->intf, 0x03, WAC_CMD_ICON_START,
			 buf, 2, WAC_CMD_RETRIES);

out:
	kfree(buf);
	return retval;
}

696
static ssize_t wacom_led_select_store(struct device *dev, int set_id,
697 698 699 700 701 702 703 704 705 706 707 708
				      const char *buf, size_t count)
{
	struct wacom *wacom = dev_get_drvdata(dev);
	unsigned int id;
	int err;

	err = kstrtouint(buf, 10, &id);
	if (err)
		return err;

	mutex_lock(&wacom->lock);

709
	wacom->led.select[set_id] = id & 0x3;
710 711 712 713 714 715 716
	err = wacom_led_control(wacom);

	mutex_unlock(&wacom->lock);

	return err < 0 ? err : count;
}

717 718 719 720 721 722
#define DEVICE_LED_SELECT_ATTR(SET_ID)					\
static ssize_t wacom_led##SET_ID##_select_store(struct device *dev,	\
	struct device_attribute *attr, const char *buf, size_t count)	\
{									\
	return wacom_led_select_store(dev, SET_ID, buf, count);		\
}									\
723 724 725 726 727 728 729 730
static ssize_t wacom_led##SET_ID##_select_show(struct device *dev,	\
	struct device_attribute *attr, char *buf)			\
{									\
	struct wacom *wacom = dev_get_drvdata(dev);			\
	return snprintf(buf, 2, "%d\n", wacom->led.select[SET_ID]);	\
}									\
static DEVICE_ATTR(status_led##SET_ID##_select, S_IWUSR | S_IRUSR,	\
		    wacom_led##SET_ID##_select_show,			\
731 732 733 734
		    wacom_led##SET_ID##_select_store)

DEVICE_LED_SELECT_ATTR(0);
DEVICE_LED_SELECT_ATTR(1);
735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807

static ssize_t wacom_luminance_store(struct wacom *wacom, u8 *dest,
				     const char *buf, size_t count)
{
	unsigned int value;
	int err;

	err = kstrtouint(buf, 10, &value);
	if (err)
		return err;

	mutex_lock(&wacom->lock);

	*dest = value & 0x7f;
	err = wacom_led_control(wacom);

	mutex_unlock(&wacom->lock);

	return err < 0 ? err : count;
}

#define DEVICE_LUMINANCE_ATTR(name, field)				\
static ssize_t wacom_##name##_luminance_store(struct device *dev,	\
	struct device_attribute *attr, const char *buf, size_t count)	\
{									\
	struct wacom *wacom = dev_get_drvdata(dev);			\
									\
	return wacom_luminance_store(wacom, &wacom->led.field,		\
				     buf, count);			\
}									\
static DEVICE_ATTR(name##_luminance, S_IWUSR,				\
		   NULL, wacom_##name##_luminance_store)

DEVICE_LUMINANCE_ATTR(status0, llv);
DEVICE_LUMINANCE_ATTR(status1, hlv);
DEVICE_LUMINANCE_ATTR(buttons, img_lum);

static ssize_t wacom_button_image_store(struct device *dev, int button_id,
					const char *buf, size_t count)
{
	struct wacom *wacom = dev_get_drvdata(dev);
	int err;

	if (count != 1024)
		return -EINVAL;

	mutex_lock(&wacom->lock);

	err = wacom_led_putimage(wacom, button_id, buf);

	mutex_unlock(&wacom->lock);

	return err < 0 ? err : count;
}

#define DEVICE_BTNIMG_ATTR(BUTTON_ID)					\
static ssize_t wacom_btnimg##BUTTON_ID##_store(struct device *dev,	\
	struct device_attribute *attr, const char *buf, size_t count)	\
{									\
	return wacom_button_image_store(dev, BUTTON_ID, buf, count);	\
}									\
static DEVICE_ATTR(button##BUTTON_ID##_rawimg, S_IWUSR,			\
		   NULL, wacom_btnimg##BUTTON_ID##_store)

DEVICE_BTNIMG_ATTR(0);
DEVICE_BTNIMG_ATTR(1);
DEVICE_BTNIMG_ATTR(2);
DEVICE_BTNIMG_ATTR(3);
DEVICE_BTNIMG_ATTR(4);
DEVICE_BTNIMG_ATTR(5);
DEVICE_BTNIMG_ATTR(6);
DEVICE_BTNIMG_ATTR(7);

808 809 810 811 812 813 814 815 816 817 818 819
static struct attribute *cintiq_led_attrs[] = {
	&dev_attr_status_led0_select.attr,
	&dev_attr_status_led1_select.attr,
	NULL
};

static struct attribute_group cintiq_led_attr_group = {
	.name = "wacom_led",
	.attrs = cintiq_led_attrs,
};

static struct attribute *intuos4_led_attrs[] = {
820 821
	&dev_attr_status0_luminance.attr,
	&dev_attr_status1_luminance.attr,
822
	&dev_attr_status_led0_select.attr,
823 824 825 826 827 828 829 830 831 832 833 834
	&dev_attr_buttons_luminance.attr,
	&dev_attr_button0_rawimg.attr,
	&dev_attr_button1_rawimg.attr,
	&dev_attr_button2_rawimg.attr,
	&dev_attr_button3_rawimg.attr,
	&dev_attr_button4_rawimg.attr,
	&dev_attr_button5_rawimg.attr,
	&dev_attr_button6_rawimg.attr,
	&dev_attr_button7_rawimg.attr,
	NULL
};

835
static struct attribute_group intuos4_led_attr_group = {
836
	.name = "wacom_led",
837
	.attrs = intuos4_led_attrs,
838 839
};

840 841 842 843 844 845 846 847 848 849 850
static struct attribute *intuos5_led_attrs[] = {
	&dev_attr_status0_luminance.attr,
	&dev_attr_status_led0_select.attr,
	NULL
};

static struct attribute_group intuos5_led_attr_group = {
	.name = "wacom_led",
	.attrs = intuos5_led_attrs,
};

851 852 853 854
static int wacom_initialize_leds(struct wacom *wacom)
{
	int error;

855 856 857 858 859 860
	/* Initialize default values */
	switch (wacom->wacom_wac.features.type) {
	case INTUOS4:
	case INTUOS4L:
		wacom->led.select[0] = 0;
		wacom->led.select[1] = 0;
861
		wacom->led.llv = 10;
862 863
		wacom->led.hlv = 20;
		wacom->led.img_lum = 10;
864 865 866 867
		error = sysfs_create_group(&wacom->intf->dev.kobj,
					   &intuos4_led_attr_group);
		break;

868
	case WACOM_24HD:
869 870 871 872 873 874
	case WACOM_21UX2:
		wacom->led.select[0] = 0;
		wacom->led.select[1] = 0;
		wacom->led.llv = 0;
		wacom->led.hlv = 0;
		wacom->led.img_lum = 0;
875 876

		error = sysfs_create_group(&wacom->intf->dev.kobj,
877 878 879
					   &cintiq_led_attr_group);
		break;

880 881 882 883 884 885 886 887 888 889 890 891 892
	case INTUOS5S:
	case INTUOS5:
	case INTUOS5L:
		wacom->led.select[0] = 0;
		wacom->led.select[1] = 0;
		wacom->led.llv = 32;
		wacom->led.hlv = 0;
		wacom->led.img_lum = 0;

		error = sysfs_create_group(&wacom->intf->dev.kobj,
					   &intuos5_led_attr_group);
		break;

893 894
	default:
		return 0;
895 896
	}

897 898 899 900 901 902 903
	if (error) {
		dev_err(&wacom->intf->dev,
			"cannot create sysfs group err: %d\n", error);
		return error;
	}
	wacom_led_control(wacom);

904 905 906 907 908
	return 0;
}

static void wacom_destroy_leds(struct wacom *wacom)
{
909 910 911
	switch (wacom->wacom_wac.features.type) {
	case INTUOS4:
	case INTUOS4L:
912
		sysfs_remove_group(&wacom->intf->dev.kobj,
913 914 915
				   &intuos4_led_attr_group);
		break;

916
	case WACOM_24HD:
917 918 919 920
	case WACOM_21UX2:
		sysfs_remove_group(&wacom->intf->dev.kobj,
				   &cintiq_led_attr_group);
		break;
921 922 923 924 925 926 927

	case INTUOS5S:
	case INTUOS5:
	case INTUOS5L:
		sysfs_remove_group(&wacom->intf->dev.kobj,
				   &intuos5_led_attr_group);
		break;
928 929 930
	}
}

931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979
static enum power_supply_property wacom_battery_props[] = {
	POWER_SUPPLY_PROP_CAPACITY
};

static int wacom_battery_get_property(struct power_supply *psy,
				      enum power_supply_property psp,
				      union power_supply_propval *val)
{
	struct wacom *wacom = container_of(psy, struct wacom, battery);
	int ret = 0;

	switch (psp) {
		case POWER_SUPPLY_PROP_CAPACITY:
			val->intval =
				wacom->wacom_wac.battery_capacity * 100 / 31;
			break;
		default:
			ret = -EINVAL;
			break;
	}

	return ret;
}

static int wacom_initialize_battery(struct wacom *wacom)
{
	int error = 0;

	if (wacom->wacom_wac.features.quirks & WACOM_QUIRK_MONITOR) {
		wacom->battery.properties = wacom_battery_props;
		wacom->battery.num_properties = ARRAY_SIZE(wacom_battery_props);
		wacom->battery.get_property = wacom_battery_get_property;
		wacom->battery.name = "wacom_battery";
		wacom->battery.type = POWER_SUPPLY_TYPE_BATTERY;
		wacom->battery.use_for_apm = 0;

		error = power_supply_register(&wacom->usbdev->dev,
					      &wacom->battery);
	}

	return error;
}

static void wacom_destroy_battery(struct wacom *wacom)
{
	if (wacom->wacom_wac.features.quirks & WACOM_QUIRK_MONITOR)
		power_supply_unregister(&wacom->battery);
}

980 981 982 983 984 985 986 987 988
static int wacom_register_input(struct wacom *wacom)
{
	struct input_dev *input_dev;
	struct usb_interface *intf = wacom->intf;
	struct usb_device *dev = interface_to_usbdev(intf);
	struct wacom_wac *wacom_wac = &(wacom->wacom_wac);
	int error;

	input_dev = input_allocate_device();
989 990 991 992
	if (!input_dev) {
		error = -ENOMEM;
		goto fail1;
	}
993 994 995 996 997 998 999 1000 1001

	input_dev->name = wacom_wac->name;
	input_dev->dev.parent = &intf->dev;
	input_dev->open = wacom_open;
	input_dev->close = wacom_close;
	usb_to_input_id(dev, &input_dev->id);
	input_set_drvdata(input_dev, wacom);

	wacom_wac->input = input_dev;
1002 1003 1004
	error = wacom_setup_input_capabilities(input_dev, wacom_wac);
	if (error)
		goto fail1;
1005 1006

	error = input_register_device(input_dev);
1007 1008 1009 1010
	if (error)
		goto fail2;

	return 0;
1011

1012 1013 1014 1015
fail2:
	input_free_device(input_dev);
	wacom_wac->input = NULL;
fail1:
1016 1017 1018
	return error;
}

1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033
static void wacom_wireless_work(struct work_struct *work)
{
	struct wacom *wacom = container_of(work, struct wacom, work);
	struct usb_device *usbdev = wacom->usbdev;
	struct wacom_wac *wacom_wac = &wacom->wacom_wac;

	/*
	 * Regardless if this is a disconnect or a new tablet,
	 * remove any existing input devices.
	 */

	/* Stylus interface */
	wacom = usb_get_intfdata(usbdev->config->interface[1]);
	if (wacom->wacom_wac.input)
		input_unregister_device(wacom->wacom_wac.input);
1034
	wacom->wacom_wac.input = NULL;
1035 1036 1037 1038 1039

	/* Touch interface */
	wacom = usb_get_intfdata(usbdev->config->interface[2]);
	if (wacom->wacom_wac.input)
		input_unregister_device(wacom->wacom_wac.input);
1040
	wacom->wacom_wac.input = NULL;
1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084

	if (wacom_wac->pid == 0) {
		printk(KERN_INFO "wacom: wireless tablet disconnected\n");
	} else {
		const struct usb_device_id *id = wacom_ids;

		printk(KERN_INFO
		       "wacom: wireless tablet connected with PID %x\n",
		       wacom_wac->pid);

		while (id->match_flags) {
			if (id->idVendor == USB_VENDOR_ID_WACOM &&
			    id->idProduct == wacom_wac->pid)
				break;
			id++;
		}

		if (!id->match_flags) {
			printk(KERN_INFO
			       "wacom: ignorning unknown PID.\n");
			return;
		}

		/* Stylus interface */
		wacom = usb_get_intfdata(usbdev->config->interface[1]);
		wacom_wac = &wacom->wacom_wac;
		wacom_wac->features =
			*((struct wacom_features *)id->driver_info);
		wacom_wac->features.device_type = BTN_TOOL_PEN;
		wacom_register_input(wacom);

		/* Touch interface */
		wacom = usb_get_intfdata(usbdev->config->interface[2]);
		wacom_wac = &wacom->wacom_wac;
		wacom_wac->features =
			*((struct wacom_features *)id->driver_info);
		wacom_wac->features.pktlen = WACOM_PKGLEN_BBTOUCH3;
		wacom_wac->features.device_type = BTN_TOOL_FINGER;
		wacom_set_phy_from_res(&wacom_wac->features);
		wacom_wac->features.x_max = wacom_wac->features.y_max = 4096;
		wacom_register_input(wacom);
	}
}

1085 1086 1087 1088 1089 1090
static int wacom_probe(struct usb_interface *intf, const struct usb_device_id *id)
{
	struct usb_device *dev = interface_to_usbdev(intf);
	struct usb_endpoint_descriptor *endpoint;
	struct wacom *wacom;
	struct wacom_wac *wacom_wac;
1091 1092
	struct wacom_features *features;
	int error;
1093

1094
	if (!id->driver_info)
1095 1096
		return -EINVAL;

1097
	wacom = kzalloc(sizeof(struct wacom), GFP_KERNEL);
1098 1099
	if (!wacom)
		return -ENOMEM;
1100

1101
	wacom_wac = &wacom->wacom_wac;
1102 1103 1104 1105
	wacom_wac->features = *((struct wacom_features *)id->driver_info);
	features = &wacom_wac->features;
	if (features->pktlen > WACOM_PKGLEN_MAX) {
		error = -EINVAL;
1106
		goto fail1;
1107
	}
1108

1109 1110
	wacom_wac->data = usb_alloc_coherent(dev, WACOM_PKGLEN_MAX,
					     GFP_KERNEL, &wacom->data_dma);
1111 1112
	if (!wacom_wac->data) {
		error = -ENOMEM;
1113
		goto fail1;
1114
	}
1115 1116

	wacom->irq = usb_alloc_urb(0, GFP_KERNEL);
1117 1118
	if (!wacom->irq) {
		error = -ENOMEM;
1119
		goto fail2;
1120
	}
1121 1122

	wacom->usbdev = dev;
1123 1124
	wacom->intf = intf;
	mutex_init(&wacom->lock);
1125
	INIT_WORK(&wacom->work, wacom_wireless_work);
1126 1127 1128
	usb_make_path(dev, wacom->phys, sizeof(wacom->phys));
	strlcat(wacom->phys, "/input0", sizeof(wacom->phys));

1129 1130
	endpoint = &intf->cur_altsetting->endpoint[0].desc;

1131
	/* Retrieve the physical and logical size for touch devices */
1132 1133
	error = wacom_retrieve_hid_descriptor(intf, features);
	if (error)
1134
		goto fail3;
1135

1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157
	/*
	 * Intuos5 has no useful data about its touch interface in its
	 * HID descriptor. If this is the touch interface (wMaxPacketSize
	 * of WACOM_PKGLEN_BBTOUCH3), override the table values.
	 */
	if (features->type >= INTUOS5S && features->type <= INTUOS5L) {
		if (endpoint->wMaxPacketSize == WACOM_PKGLEN_BBTOUCH3) {
			features->device_type = BTN_TOOL_FINGER;
			features->pktlen = WACOM_PKGLEN_BBTOUCH3;

			features->x_phy =
				(features->x_max * 100) / features->x_resolution;
			features->y_phy =
				(features->y_max * 100) / features->y_resolution;

			features->x_max = 4096;
			features->y_max = 4096;
		} else {
			features->device_type = BTN_TOOL_PEN;
		}
	}

1158 1159
	wacom_setup_device_quirks(features);

1160 1161
	strlcpy(wacom_wac->name, features->name, sizeof(wacom_wac->name));

1162
	if (features->quirks & WACOM_QUIRK_MULTI_INPUT) {
1163 1164 1165 1166 1167
		/* Append the device type to the name */
		strlcat(wacom_wac->name,
			features->device_type == BTN_TOOL_PEN ?
				" Pen" : " Finger",
			sizeof(wacom_wac->name));
1168 1169 1170 1171

		error = wacom_add_shared_data(wacom_wac, dev);
		if (error)
			goto fail3;
1172 1173
	}

1174 1175
	usb_fill_int_urb(wacom->irq, dev,
			 usb_rcvintpipe(dev, endpoint->bEndpointAddress),
1176
			 wacom_wac->data, features->pktlen,
P
Ping Cheng 已提交
1177
			 wacom_sys_irq, wacom, endpoint->bInterval);
1178 1179 1180
	wacom->irq->transfer_dma = wacom->data_dma;
	wacom->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;

1181
	error = wacom_initialize_leds(wacom);
1182
	if (error)
1183
		goto fail4;
1184

1185 1186 1187 1188
	error = wacom_initialize_battery(wacom);
	if (error)
		goto fail5;

1189 1190 1191
	if (!(features->quirks & WACOM_QUIRK_NO_INPUT)) {
		error = wacom_register_input(wacom);
		if (error)
1192
			goto fail6;
1193
	}
1194

1195 1196
	/* Note that if query fails it is not a hard failure */
	wacom_query_tablet_data(intf, features);
1197 1198

	usb_set_intfdata(intf, wacom);
1199 1200 1201 1202 1203 1204

	if (features->quirks & WACOM_QUIRK_MONITOR) {
		if (usb_submit_urb(wacom->irq, GFP_KERNEL))
			goto fail5;
	}

1205 1206
	return 0;

1207
 fail6: wacom_destroy_battery(wacom);
1208
 fail5: wacom_destroy_leds(wacom);
1209
 fail4:	wacom_remove_shared_data(wacom_wac);
1210
 fail3:	usb_free_urb(wacom->irq);
1211
 fail2:	usb_free_coherent(dev, WACOM_PKGLEN_MAX, wacom_wac->data, wacom->data_dma);
1212
 fail1:	kfree(wacom);
1213
	return error;
1214 1215 1216 1217
}

static void wacom_disconnect(struct usb_interface *intf)
{
1218
	struct wacom *wacom = usb_get_intfdata(intf);
1219 1220

	usb_set_intfdata(intf, NULL);
1221 1222

	usb_kill_urb(wacom->irq);
1223
	cancel_work_sync(&wacom->work);
1224 1225
	if (wacom->wacom_wac.input)
		input_unregister_device(wacom->wacom_wac.input);
1226
	wacom_destroy_battery(wacom);
1227
	wacom_destroy_leds(wacom);
1228
	usb_free_urb(wacom->irq);
1229
	usb_free_coherent(interface_to_usbdev(intf), WACOM_PKGLEN_MAX,
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			wacom->wacom_wac.data, wacom->data_dma);
	wacom_remove_shared_data(&wacom->wacom_wac);
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	kfree(wacom);
}

static int wacom_suspend(struct usb_interface *intf, pm_message_t message)
{
	struct wacom *wacom = usb_get_intfdata(intf);

	mutex_lock(&wacom->lock);
	usb_kill_urb(wacom->irq);
	mutex_unlock(&wacom->lock);

	return 0;
}

static int wacom_resume(struct usb_interface *intf)
{
	struct wacom *wacom = usb_get_intfdata(intf);
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	struct wacom_features *features = &wacom->wacom_wac.features;
1250
	int rv = 0;
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	mutex_lock(&wacom->lock);
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	/* switch to wacom mode first */
	wacom_query_tablet_data(intf, features);
1256
	wacom_led_control(wacom);
1257

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	if ((wacom->open || features->quirks & WACOM_QUIRK_MONITOR)
	     && usb_submit_urb(wacom->irq, GFP_NOIO) < 0)
1260
		rv = -EIO;
1261

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	mutex_unlock(&wacom->lock);

	return rv;
}

static int wacom_reset_resume(struct usb_interface *intf)
{
	return wacom_resume(intf);
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}

static struct usb_driver wacom_driver = {
	.name =		"wacom",
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	.id_table =	wacom_ids,
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	.probe =	wacom_probe,
	.disconnect =	wacom_disconnect,
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	.suspend =	wacom_suspend,
	.resume =	wacom_resume,
	.reset_resume =	wacom_reset_resume,
	.supports_autosuspend = 1,
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};

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module_usb_driver(wacom_driver);