/*
* drivers/input/tablet/wacom_sys.c
*
* USB Wacom tablet support - system specific code
*/
/*
* 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"
#include "wacom.h"
/* 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
#define HID_USAGE_CONTACTMAX 0x55
#define HID_COLLECTION 0xa1
#define HID_COLLECTION_LOGICAL 0x02
#define HID_COLLECTION_END 0xc0
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 */
#define USB_REQ_GET_REPORT 0x01
#define USB_REQ_SET_REPORT 0x09
#define WAC_HID_FEATURE_REPORT 0x03
#define WAC_MSG_RETRIES 5
#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)
{
struct usb_device *dev = interface_to_usbdev(intf);
int retval;
do {
retval = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
USB_REQ_GET_REPORT,
USB_DIR_IN | USB_TYPE_CLASS |
USB_RECIP_INTERFACE,
(type << 8) + id,
intf->altsetting[0].desc.bInterfaceNumber,
buf, size, 100);
} while ((retval == -ETIMEDOUT || retval == -EPIPE) && --retries);
return retval;
}
static int wacom_set_report(struct usb_interface *intf, u8 type, u8 id,
void *buf, size_t size, unsigned int retries)
{
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);