wacom_sys.c 35.4 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;
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	struct device *dev = &wacom->intf->dev;
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	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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		dev_dbg(dev, "%s - urb shutting down with status: %d\n",
			__func__, urb->status);
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		return;
	default:
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		dev_dbg(dev, "%s - nonzero urb status received: %d\n",
			__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)
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		dev_err(dev, "%s - usb_submit_urb failed with result %d\n",
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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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/*
 * Calculate the resolution of the X or Y axis, given appropriate HID data.
 * This function is little more than hidinput_calc_abs_res stripped down.
 */
static int wacom_calc_hid_res(int logical_extents, int physical_extents,
                              unsigned char unit, unsigned char exponent)
{
	int prev, unit_exponent;

	/* Check if the extents are sane */
	if (logical_extents <= 0 || physical_extents <= 0)
		return 0;

	/* Get signed value of nybble-sized twos-compliment exponent */
	unit_exponent = exponent;
	if (unit_exponent > 7)
		unit_exponent -= 16;

	/* Convert physical_extents to millimeters */
	if (unit == 0x11) {		/* If centimeters */
		unit_exponent += 1;
	} else if (unit == 0x13) {	/* If inches */
		prev = physical_extents;
		physical_extents *= 254;
		if (physical_extents < prev)
			return 0;
		unit_exponent -= 1;
	} else {
		return 0;
	}

	/* Apply negative unit exponent */
	for (; unit_exponent < 0; unit_exponent++) {
		prev = logical_extents;
		logical_extents *= 10;
		if (logical_extents < prev)
			return 0;
	}
	/* Apply positive unit exponent */
	for (; unit_exponent > 0; unit_exponent--) {
		prev = physical_extents;
		physical_extents *= 10;
		if (physical_extents < prev)
			return 0;
	}

	/* Calculate resolution */
	return logical_extents / physical_extents;
}

/*
 * The physical dimension specified by the HID descriptor is likely not in
 * the "100th of a mm" units expected by wacom_calculate_touch_res. This
 * function adjusts the value of [xy]_phy based on the unit and exponent
 * provided by the HID descriptor. If an error occurs durring conversion
 * (e.g. from the unit being left unspecified) [xy]_phy is not modified.
 */
static void wacom_fix_phy_from_hid(struct wacom_features *features)
{
	int xres = wacom_calc_hid_res(features->x_max, features->x_phy,
					features->unit, features->unitExpo);
	int yres = wacom_calc_hid_res(features->y_max, features->y_phy,
					features->unit, features->unitExpo);

	if (xres > 0 && yres > 0) {
		features->x_phy = (100 * features->x_max) / xres;
		features->y_phy = (100 * features->y_max) / yres;
	}
}

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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,
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					  rep_data[0], rep_data, 2,
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					  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 || WACOM_24HDT)
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							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;
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						} else if (features->type == WACOM_24HDT) {
							features->x_max =
								get_unaligned_le16(&report[i + 3]);
							features->x_phy =
								get_unaligned_le16(&report[i + 8]);
							features->unit = report[i - 1];
							features->unitExpo = report[i - 3];
							i += 12;
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						} 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 == WACOM_24HDT) {
							features->y_max =
								get_unaligned_le16(&report[i + 3]);
							features->y_phy =
								get_unaligned_le16(&report[i - 2]);
							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:
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				/* leave touch_max as is if predefined */
				if (!features->touch_max)
					wacom_retrieve_report_data(intf, features);
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				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_set_device_mode(struct usb_interface *intf, int report_id, int length, int mode)
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{
	unsigned char *rep_data;
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	int error = -ENOMEM, limit = 0;
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	rep_data = kzalloc(length, GFP_KERNEL);
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	if (!rep_data)
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		return error;

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	rep_data[0] = report_id;
	rep_data[1] = mode;

	do {
		error = wacom_set_report(intf, WAC_HID_FEATURE_REPORT,
		                         report_id, rep_data, length, 1);
		if (error >= 0)
			error = wacom_get_report(intf, WAC_HID_FEATURE_REPORT,
			                         report_id, rep_data, length, 1);
	} while ((error < 0 || rep_data[1] != mode) && limit++ < WAC_MSG_RETRIES);

	kfree(rep_data);

	return error < 0 ? error : 0;
}

/*
 * Switch the tablet into its most-capable mode. Wacom tablets are
 * typically configured to power-up in a mode which sends mouse-like
 * reports to the OS. To get absolute position, pressure data, etc.
 * from the tablet, it is necessary to switch the tablet out of this
 * mode and into one which sends the full range of tablet data.
 */
static int wacom_query_tablet_data(struct usb_interface *intf, struct wacom_features *features)
{
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	if (features->device_type == BTN_TOOL_FINGER) {
P
Ping Cheng 已提交
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		if (features->type > TABLETPC) {
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			/* MT Tablet PC touch */
			return wacom_set_device_mode(intf, 3, 4, 4);
		}
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		else if (features->type == WACOM_24HDT) {
			return wacom_set_device_mode(intf, 18, 3, 2);
		}
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	} else if (features->device_type == BTN_TOOL_PEN) {
		if (features->type <= BAMBOO_PT && features->type != WIRELESS) {
			return wacom_set_device_mode(intf, 2, 2, 2);
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		}
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	}
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	return 0;
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}

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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) {
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			features->device_type = BTN_TOOL_FINGER;
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			features->pktlen = WACOM_PKGLEN_BBTOUCH3;
		}
	}

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	/* only devices that support touch need to retrieve the info */
P
Ping Cheng 已提交
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	if (features->type < BAMBOO_PT) {
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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) {
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			dev_err(&intf->dev,
				"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;
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	wacom_fix_phy_from_hid(features);
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 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);

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static struct usb_device *wacom_get_sibling(struct usb_device *dev, int vendor, int product)
{
	int port1;
	struct usb_device *sibling;

	if (vendor == 0 && product == 0)
		return dev;

	if (dev->parent == NULL)
		return NULL;

	usb_hub_for_each_child(dev->parent, port1, sibling) {
		struct usb_device_descriptor *d;
		if (sibling == NULL)
			continue;

		d = &sibling->descriptor;
		if (d->idVendor == vendor && d->idProduct == product)
			return sibling;
	}

	return NULL;
}

657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721
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;
	}
}

722 723 724
static int wacom_led_control(struct wacom *wacom)
{
	unsigned char *buf;
725
	int retval;
726 727 728 729 730

	buf = kzalloc(9, GFP_KERNEL);
	if (!buf)
		return -ENOMEM;

731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757
	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;
	}
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

	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;
}

806
static ssize_t wacom_led_select_store(struct device *dev, int set_id,
807 808 809 810 811 812 813 814 815 816 817 818
				      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);

819
	wacom->led.select[set_id] = id & 0x3;
820 821 822 823 824 825 826
	err = wacom_led_control(wacom);

	mutex_unlock(&wacom->lock);

	return err < 0 ? err : count;
}

827 828 829 830 831 832
#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);		\
}									\
833 834 835 836 837 838 839 840
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,			\
841 842 843 844
		    wacom_led##SET_ID##_select_store)

DEVICE_LED_SELECT_ATTR(0);
DEVICE_LED_SELECT_ATTR(1);
845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917

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);

918 919 920 921 922 923 924 925 926 927 928 929
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[] = {
930 931
	&dev_attr_status0_luminance.attr,
	&dev_attr_status1_luminance.attr,
932
	&dev_attr_status_led0_select.attr,
933 934 935 936 937 938 939 940 941 942 943 944
	&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
};

945
static struct attribute_group intuos4_led_attr_group = {
946
	.name = "wacom_led",
947
	.attrs = intuos4_led_attrs,
948 949
};

950 951 952 953 954 955 956 957 958 959 960
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,
};

961 962 963 964
static int wacom_initialize_leds(struct wacom *wacom)
{
	int error;

965 966
	/* Initialize default values */
	switch (wacom->wacom_wac.features.type) {
967
	case INTUOS4S:
968 969 970 971
	case INTUOS4:
	case INTUOS4L:
		wacom->led.select[0] = 0;
		wacom->led.select[1] = 0;
972
		wacom->led.llv = 10;
973 974
		wacom->led.hlv = 20;
		wacom->led.img_lum = 10;
975 976 977 978
		error = sysfs_create_group(&wacom->intf->dev.kobj,
					   &intuos4_led_attr_group);
		break;

979
	case WACOM_24HD:
980 981 982 983 984 985
	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;
986 987

		error = sysfs_create_group(&wacom->intf->dev.kobj,
988 989 990
					   &cintiq_led_attr_group);
		break;

991 992 993 994 995 996 997 998 999 1000 1001 1002 1003
	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;

1004 1005
	default:
		return 0;
1006 1007
	}

1008 1009 1010 1011 1012 1013 1014
	if (error) {
		dev_err(&wacom->intf->dev,
			"cannot create sysfs group err: %d\n", error);
		return error;
	}
	wacom_led_control(wacom);

1015 1016 1017 1018 1019
	return 0;
}

static void wacom_destroy_leds(struct wacom *wacom)
{
1020
	switch (wacom->wacom_wac.features.type) {
1021
	case INTUOS4S:
1022 1023
	case INTUOS4:
	case INTUOS4L:
1024
		sysfs_remove_group(&wacom->intf->dev.kobj,
1025 1026 1027
				   &intuos4_led_attr_group);
		break;

1028
	case WACOM_24HD:
1029 1030 1031 1032
	case WACOM_21UX2:
		sysfs_remove_group(&wacom->intf->dev.kobj,
				   &cintiq_led_attr_group);
		break;
1033 1034 1035 1036 1037 1038 1039

	case INTUOS5S:
	case INTUOS5:
	case INTUOS5L:
		sysfs_remove_group(&wacom->intf->dev.kobj,
				   &intuos5_led_attr_group);
		break;
1040 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
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);
1081 1082 1083 1084

		if (!error)
			power_supply_powers(&wacom->battery,
					    &wacom->usbdev->dev);
1085 1086 1087 1088 1089 1090 1091
	}

	return error;
}

static void wacom_destroy_battery(struct wacom *wacom)
{
1092 1093
	if (wacom->wacom_wac.features.quirks & WACOM_QUIRK_MONITOR &&
	    wacom->battery.dev) {
1094
		power_supply_unregister(&wacom->battery);
1095 1096
		wacom->battery.dev = NULL;
	}
1097 1098
}

1099 1100 1101 1102 1103 1104 1105 1106 1107
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();
1108 1109 1110 1111
	if (!input_dev) {
		error = -ENOMEM;
		goto fail1;
	}
1112 1113 1114 1115 1116 1117 1118 1119 1120

	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;
1121 1122 1123
	error = wacom_setup_input_capabilities(input_dev, wacom_wac);
	if (error)
		goto fail1;
1124 1125

	error = input_register_device(input_dev);
1126 1127 1128 1129
	if (error)
		goto fail2;

	return 0;
1130

1131 1132 1133 1134
fail2:
	input_free_device(input_dev);
	wacom_wac->input = NULL;
fail1:
1135 1136 1137
	return error;
}

1138 1139 1140 1141 1142
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;
1143 1144 1145
	struct wacom *wacom1, *wacom2;
	struct wacom_wac *wacom_wac1, *wacom_wac2;
	int error;
1146 1147 1148

	/*
	 * Regardless if this is a disconnect or a new tablet,
1149
	 * remove any existing input and battery devices.
1150 1151
	 */

1152 1153
	wacom_destroy_battery(wacom);

1154
	/* Stylus interface */
1155 1156 1157 1158 1159
	wacom1 = usb_get_intfdata(usbdev->config->interface[1]);
	wacom_wac1 = &(wacom1->wacom_wac);
	if (wacom_wac1->input)
		input_unregister_device(wacom_wac1->input);
	wacom_wac1->input = NULL;
1160 1161

	/* Touch interface */
1162 1163 1164 1165 1166
	wacom2 = usb_get_intfdata(usbdev->config->interface[2]);
	wacom_wac2 = &(wacom2->wacom_wac);
	if (wacom_wac2->input)
		input_unregister_device(wacom_wac2->input);
	wacom_wac2->input = NULL;
1167 1168

	if (wacom_wac->pid == 0) {
1169
		dev_info(&wacom->intf->dev, "wireless tablet disconnected\n");
1170 1171 1172
	} else {
		const struct usb_device_id *id = wacom_ids;

1173 1174 1175
		dev_info(&wacom->intf->dev,
			 "wireless tablet connected with PID %x\n",
			 wacom_wac->pid);
1176 1177 1178 1179 1180 1181 1182 1183 1184

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

		if (!id->match_flags) {
1185 1186
			dev_info(&wacom->intf->dev,
				 "ignoring unknown PID.\n");
1187 1188 1189 1190
			return;
		}

		/* Stylus interface */
1191
		wacom_wac1->features =
1192
			*((struct wacom_features *)id->driver_info);
1193 1194 1195 1196
		wacom_wac1->features.device_type = BTN_TOOL_PEN;
		error = wacom_register_input(wacom1);
		if (error)
			goto fail1;
1197 1198

		/* Touch interface */
1199
		wacom_wac2->features =
1200
			*((struct wacom_features *)id->driver_info);
1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211
		wacom_wac2->features.pktlen = WACOM_PKGLEN_BBTOUCH3;
		wacom_wac2->features.device_type = BTN_TOOL_FINGER;
		wacom_set_phy_from_res(&wacom_wac2->features);
		wacom_wac2->features.x_max = wacom_wac2->features.y_max = 4096;
		error = wacom_register_input(wacom2);
		if (error)
			goto fail2;

		error = wacom_initialize_battery(wacom);
		if (error)
			goto fail3;
1212
	}
1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223

	return;

fail3:
	input_unregister_device(wacom_wac2->input);
	wacom_wac2->input = NULL;
fail2:
	input_unregister_device(wacom_wac1->input);
	wacom_wac1->input = NULL;
fail1:
	return;
1224 1225
}

1226 1227 1228 1229 1230 1231
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;
1232 1233
	struct wacom_features *features;
	int error;
1234

1235
	if (!id->driver_info)
1236 1237
		return -EINVAL;

1238
	wacom = kzalloc(sizeof(struct wacom), GFP_KERNEL);
1239 1240
	if (!wacom)
		return -ENOMEM;
1241

1242
	wacom_wac = &wacom->wacom_wac;
1243 1244 1245 1246
	wacom_wac->features = *((struct wacom_features *)id->driver_info);
	features = &wacom_wac->features;
	if (features->pktlen > WACOM_PKGLEN_MAX) {
		error = -EINVAL;
1247
		goto fail1;
1248
	}
1249

1250 1251
	wacom_wac->data = usb_alloc_coherent(dev, WACOM_PKGLEN_MAX,
					     GFP_KERNEL, &wacom->data_dma);
1252 1253
	if (!wacom_wac->data) {
		error = -ENOMEM;
1254
		goto fail1;
1255
	}
1256 1257

	wacom->irq = usb_alloc_urb(0, GFP_KERNEL);
1258 1259
	if (!wacom->irq) {
		error = -ENOMEM;
1260
		goto fail2;
1261
	}
1262 1263

	wacom->usbdev = dev;
1264 1265
	wacom->intf = intf;
	mutex_init(&wacom->lock);
1266
	INIT_WORK(&wacom->work, wacom_wireless_work);
1267 1268 1269
	usb_make_path(dev, wacom->phys, sizeof(wacom->phys));
	strlcat(wacom->phys, "/input0", sizeof(wacom->phys));

1270 1271
	endpoint = &intf->cur_altsetting->endpoint[0].desc;

1272
	/* Retrieve the physical and logical size for touch devices */
1273 1274
	error = wacom_retrieve_hid_descriptor(intf, features);
	if (error)
1275
		goto fail3;
1276

1277 1278 1279 1280 1281 1282 1283 1284 1285 1286
	/*
	 * 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;

1287
			wacom_set_phy_from_res(features);
1288 1289 1290 1291 1292 1293 1294 1295

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

1296 1297
	wacom_setup_device_quirks(features);

1298 1299
	strlcpy(wacom_wac->name, features->name, sizeof(wacom_wac->name));

1300
	if (features->quirks & WACOM_QUIRK_MULTI_INPUT) {
1301 1302
		struct usb_device *other_dev;

1303 1304 1305 1306 1307
		/* Append the device type to the name */
		strlcat(wacom_wac->name,
			features->device_type == BTN_TOOL_PEN ?
				" Pen" : " Finger",
			sizeof(wacom_wac->name));
1308

1309 1310 1311 1312 1313

		other_dev = wacom_get_sibling(dev, features->oVid, features->oPid);
		if (other_dev == NULL || wacom_get_usbdev_data(other_dev) == NULL)
			other_dev = dev;
		error = wacom_add_shared_data(wacom_wac, other_dev);
1314 1315
		if (error)
			goto fail3;
1316 1317
	}

1318 1319
	usb_fill_int_urb(wacom->irq, dev,
			 usb_rcvintpipe(dev, endpoint->bEndpointAddress),
1320
			 wacom_wac->data, features->pktlen,
P
Ping Cheng 已提交
1321
			 wacom_sys_irq, wacom, endpoint->bInterval);
1322 1323 1324
	wacom->irq->transfer_dma = wacom->data_dma;
	wacom->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;

1325
	error = wacom_initialize_leds(wacom);
1326
	if (error)
1327
		goto fail4;
1328

1329 1330 1331
	if (!(features->quirks & WACOM_QUIRK_NO_INPUT)) {
		error = wacom_register_input(wacom);
		if (error)
1332
			goto fail5;
1333
	}
1334

1335 1336
	/* Note that if query fails it is not a hard failure */
	wacom_query_tablet_data(intf, features);
1337 1338

	usb_set_intfdata(intf, wacom);
1339 1340 1341 1342 1343 1344

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

1345 1346
	return 0;

1347
 fail5: wacom_destroy_leds(wacom);
1348
 fail4:	wacom_remove_shared_data(wacom_wac);
1349
 fail3:	usb_free_urb(wacom->irq);
1350
 fail2:	usb_free_coherent(dev, WACOM_PKGLEN_MAX, wacom_wac->data, wacom->data_dma);
1351
 fail1:	kfree(wacom);
1352
	return error;
1353 1354 1355 1356
}

static void wacom_disconnect(struct usb_interface *intf)
{
1357
	struct wacom *wacom = usb_get_intfdata(intf);
1358 1359

	usb_set_intfdata(intf, NULL);
1360 1361

	usb_kill_urb(wacom->irq);
1362
	cancel_work_sync(&wacom->work);
1363 1364
	if (wacom->wacom_wac.input)
		input_unregister_device(wacom->wacom_wac.input);
1365
	wacom_destroy_battery(wacom);
1366
	wacom_destroy_leds(wacom);
1367
	usb_free_urb(wacom->irq);
1368
	usb_free_coherent(interface_to_usbdev(intf), WACOM_PKGLEN_MAX,
1369 1370
			wacom->wacom_wac.data, wacom->data_dma);
	wacom_remove_shared_data(&wacom->wacom_wac);
1371 1372 1373 1374 1375 1376 1377 1378 1379 1380 1381 1382 1383 1384 1385 1386 1387
	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);
1388
	struct wacom_features *features = &wacom->wacom_wac.features;
1389
	int rv = 0;
1390 1391

	mutex_lock(&wacom->lock);
1392 1393 1394

	/* switch to wacom mode first */
	wacom_query_tablet_data(intf, features);
1395
	wacom_led_control(wacom);
1396

1397 1398
	if ((wacom->open || features->quirks & WACOM_QUIRK_MONITOR)
	     && usb_submit_urb(wacom->irq, GFP_NOIO) < 0)
1399
		rv = -EIO;
1400

1401 1402 1403 1404 1405 1406 1407 1408
	mutex_unlock(&wacom->lock);

	return rv;
}

static int wacom_reset_resume(struct usb_interface *intf)
{
	return wacom_resume(intf);
1409 1410 1411 1412
}

static struct usb_driver wacom_driver = {
	.name =		"wacom",
1413
	.id_table =	wacom_ids,
1414 1415
	.probe =	wacom_probe,
	.disconnect =	wacom_disconnect,
1416 1417 1418 1419
	.suspend =	wacom_suspend,
	.resume =	wacom_resume,
	.reset_resume =	wacom_reset_resume,
	.supports_autosuspend = 1,
1420 1421
};

1422
module_usb_driver(wacom_driver);