wacom_sys.c 24.5 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_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 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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		/*
		 * Stylus and Touch have same active area
		 * so compute physical size based on stylus
		 * data before its overwritten.
		 */
		features->x_phy =
			(features->x_max * features->x_resolution) / 100;
		features->y_phy =
			(features->y_max * features->y_resolution) / 100;

		features->x_max = features->y_max =
			get_unaligned_le16(&report[10]);

		length = 11;
	}
	return length;
}

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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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 */
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 == 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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						features->device_type = BTN_TOOL_FINGER;
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						if (features->type == TABLETPC2FG) {
							/* need to reset back */
							features->pktlen = WACOM_PKGLEN_TPC2FG;
							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 (features->type == BAMBOO_PT) {
							/* need to reset back */
							features->pktlen = WACOM_PKGLEN_BBTOUCH;
							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) {
						/* 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;
						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;
			}
			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 tablet data if it is MT Tablet PC or
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	 * not a Tablet PC */
	if (features->type == TABLETPC2FG) {
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		do {
			rep_data[0] = 3;
			rep_data[1] = 4;
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			rep_data[2] = 0;
			rep_data[3] = 0;
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			report_id = 3;
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			error = wacom_set_report(intf, WAC_HID_FEATURE_REPORT,
						 report_id, rep_data, 4, 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, 4, 1);
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		} while ((error < 0 || rep_data[1] != 4) && limit++ < WAC_MSG_RETRIES);
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	} else if (features->type != TABLETPC &&
		   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,
		struct wacom_features *features)
{
	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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	/* only Tablet PCs and Bamboo P&T need to retrieve the info */
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	if ((features->type != TABLETPC) && (features->type != TABLETPC2FG) &&
	    (features->type != BAMBOO_PT))
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		goto out;

	if (usb_get_extra_descriptor(interface, HID_DEVICET_HID, &hid_desc)) {
		if (usb_get_extra_descriptor(&interface->endpoint[0],
				HID_DEVICET_REPORT, &hid_desc)) {
			printk("wacom: can not retrieve extra class descriptor\n");
			error = 1;
			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, led = 0;
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	buf = kzalloc(9, GFP_KERNEL);
	if (!buf)
		return -ENOMEM;

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

	led |=  wacom->led.select[0] | 0x4;

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	buf[0] = WAC_CMD_LED_CONTROL;
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	buf[1] = led;
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	buf[2] = wacom->led.llv;
	buf[3] = wacom->led.hlv;
	buf[4] = wacom->led.img_lum;

	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;
}

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static ssize_t wacom_led_select_store(struct device *dev, int set_id,
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				      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);

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	wacom->led.select[set_id] = id & 0x3;
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	err = wacom_led_control(wacom);

	mutex_unlock(&wacom->lock);

	return err < 0 ? err : count;
}

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#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);		\
}									\
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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,			\
656 657 658 659
		    wacom_led##SET_ID##_select_store)

DEVICE_LED_SELECT_ATTR(0);
DEVICE_LED_SELECT_ATTR(1);
660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732

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);

733 734 735 736 737 738 739 740 741 742 743 744
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[] = {
745 746
	&dev_attr_status0_luminance.attr,
	&dev_attr_status1_luminance.attr,
747
	&dev_attr_status_led0_select.attr,
748 749 750 751 752 753 754 755 756 757 758 759
	&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
};

760
static struct attribute_group intuos4_led_attr_group = {
761
	.name = "wacom_led",
762
	.attrs = intuos4_led_attrs,
763 764 765 766 767 768
};

static int wacom_initialize_leds(struct wacom *wacom)
{
	int error;

769 770 771 772 773 774
	/* Initialize default values */
	switch (wacom->wacom_wac.features.type) {
	case INTUOS4:
	case INTUOS4L:
		wacom->led.select[0] = 0;
		wacom->led.select[1] = 0;
775
		wacom->led.llv = 10;
776 777
		wacom->led.hlv = 20;
		wacom->led.img_lum = 10;
778 779 780 781
		error = sysfs_create_group(&wacom->intf->dev.kobj,
					   &intuos4_led_attr_group);
		break;

782
	case WACOM_24HD:
783 784 785 786 787 788
	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;
789 790

		error = sysfs_create_group(&wacom->intf->dev.kobj,
791 792 793 794 795
					   &cintiq_led_attr_group);
		break;

	default:
		return 0;
796 797
	}

798 799 800 801 802 803 804
	if (error) {
		dev_err(&wacom->intf->dev,
			"cannot create sysfs group err: %d\n", error);
		return error;
	}
	wacom_led_control(wacom);

805 806 807 808 809
	return 0;
}

static void wacom_destroy_leds(struct wacom *wacom)
{
810 811 812
	switch (wacom->wacom_wac.features.type) {
	case INTUOS4:
	case INTUOS4L:
813
		sysfs_remove_group(&wacom->intf->dev.kobj,
814 815 816
				   &intuos4_led_attr_group);
		break;

817
	case WACOM_24HD:
818 819 820 821
	case WACOM_21UX2:
		sysfs_remove_group(&wacom->intf->dev.kobj,
				   &cintiq_led_attr_group);
		break;
822 823 824
	}
}

825 826 827 828 829 830
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;
831
	struct wacom_features *features;
832
	struct input_dev *input_dev;
833
	int error;
834

835
	if (!id->driver_info)
836 837
		return -EINVAL;

838 839
	wacom = kzalloc(sizeof(struct wacom), GFP_KERNEL);
	input_dev = input_allocate_device();
840
	if (!wacom || !input_dev) {
841 842 843 844
		error = -ENOMEM;
		goto fail1;
	}

845
	wacom_wac = &wacom->wacom_wac;
846 847 848 849
	wacom_wac->features = *((struct wacom_features *)id->driver_info);
	features = &wacom_wac->features;
	if (features->pktlen > WACOM_PKGLEN_MAX) {
		error = -EINVAL;
850
		goto fail1;
851
	}
852

853 854
	wacom_wac->data = usb_alloc_coherent(dev, WACOM_PKGLEN_MAX,
					     GFP_KERNEL, &wacom->data_dma);
855 856
	if (!wacom_wac->data) {
		error = -ENOMEM;
857
		goto fail1;
858
	}
859 860

	wacom->irq = usb_alloc_urb(0, GFP_KERNEL);
861 862
	if (!wacom->irq) {
		error = -ENOMEM;
863
		goto fail2;
864
	}
865 866

	wacom->usbdev = dev;
867 868
	wacom->intf = intf;
	mutex_init(&wacom->lock);
869 870 871
	usb_make_path(dev, wacom->phys, sizeof(wacom->phys));
	strlcat(wacom->phys, "/input0", sizeof(wacom->phys));

872
	wacom_wac->input = input_dev;
873

874 875
	endpoint = &intf->cur_altsetting->endpoint[0].desc;

876 877 878
	/* Retrieve the physical and logical size for OEM devices */
	error = wacom_retrieve_hid_descriptor(intf, features);
	if (error)
879
		goto fail3;
880

881 882
	wacom_setup_device_quirks(features);

883 884
	strlcpy(wacom_wac->name, features->name, sizeof(wacom_wac->name));

885
	if (features->quirks & WACOM_QUIRK_MULTI_INPUT) {
886 887 888 889 890
		/* Append the device type to the name */
		strlcat(wacom_wac->name,
			features->device_type == BTN_TOOL_PEN ?
				" Pen" : " Finger",
			sizeof(wacom_wac->name));
891 892 893 894

		error = wacom_add_shared_data(wacom_wac, dev);
		if (error)
			goto fail3;
895 896
	}

897 898 899 900 901 902
	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);
903

904
	wacom_setup_input_capabilities(input_dev, wacom_wac);
905 906 907

	usb_fill_int_urb(wacom->irq, dev,
			 usb_rcvintpipe(dev, endpoint->bEndpointAddress),
908
			 wacom_wac->data, features->pktlen,
P
Ping Cheng 已提交
909
			 wacom_sys_irq, wacom, endpoint->bInterval);
910 911 912
	wacom->irq->transfer_dma = wacom->data_dma;
	wacom->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;

913
	error = wacom_initialize_leds(wacom);
914
	if (error)
915
		goto fail4;
916

917 918 919 920
	error = input_register_device(input_dev);
	if (error)
		goto fail5;

921 922
	/* Note that if query fails it is not a hard failure */
	wacom_query_tablet_data(intf, features);
923 924 925 926

	usb_set_intfdata(intf, wacom);
	return 0;

927
 fail5: wacom_destroy_leds(wacom);
928
 fail4:	wacom_remove_shared_data(wacom_wac);
929
 fail3:	usb_free_urb(wacom->irq);
930
 fail2:	usb_free_coherent(dev, WACOM_PKGLEN_MAX, wacom_wac->data, wacom->data_dma);
931
 fail1:	input_free_device(input_dev);
932
	kfree(wacom);
933
	return error;
934 935 936 937
}

static void wacom_disconnect(struct usb_interface *intf)
{
938
	struct wacom *wacom = usb_get_intfdata(intf);
939 940

	usb_set_intfdata(intf, NULL);
941 942

	usb_kill_urb(wacom->irq);
943
	input_unregister_device(wacom->wacom_wac.input);
944
	wacom_destroy_leds(wacom);
945
	usb_free_urb(wacom->irq);
946
	usb_free_coherent(interface_to_usbdev(intf), WACOM_PKGLEN_MAX,
947 948
			wacom->wacom_wac.data, wacom->data_dma);
	wacom_remove_shared_data(&wacom->wacom_wac);
949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965
	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);
966
	struct wacom_features *features = &wacom->wacom_wac.features;
967
	int rv = 0;
968 969

	mutex_lock(&wacom->lock);
970 971 972

	/* switch to wacom mode first */
	wacom_query_tablet_data(intf, features);
973
	wacom_led_control(wacom);
974

975 976
	if (wacom->open && usb_submit_urb(wacom->irq, GFP_NOIO) < 0)
		rv = -EIO;
977

978 979 980 981 982 983 984 985
	mutex_unlock(&wacom->lock);

	return rv;
}

static int wacom_reset_resume(struct usb_interface *intf)
{
	return wacom_resume(intf);
986 987 988 989
}

static struct usb_driver wacom_driver = {
	.name =		"wacom",
990
	.id_table =	wacom_ids,
991 992
	.probe =	wacom_probe,
	.disconnect =	wacom_disconnect,
993 994 995 996
	.suspend =	wacom_suspend,
	.resume =	wacom_resume,
	.reset_resume =	wacom_reset_resume,
	.supports_autosuspend = 1,
997 998
};

999
module_usb_driver(wacom_driver);