linux-imx

/*

 * Pegasus Mobile Notetaker Pen input tablet driver

 *

 * Copyright (c) 2016 Martin Kepplinger <martink@posteo.de>

 */

​

/*

 * request packet (control endpoint):

 * |-------------------------------------|

 * | Report ID | Nr of bytes | command   |

 * | (1 byte)  | (1 byte)    | (n bytes) |

 * |-------------------------------------|

 * | 0x02      | n           |           |

 * |-------------------------------------|

 *

 * data packet after set xy mode command, 0x80 0xb5 0x02 0x01

 * and pen is in range:

 *

 * byte byte name       value (bits)

 * --------------------------------------------

 * 0    status          0 1 0 0 0 0 X X

 * 1    color           0 0 0 0 H 0 S T

 * 2    X low

 * 3    X high

 * 4    Y low

 * 5    Y high

 *

 * X X  battery state:

 *  no state reported   0x00

 *  battery low     0x01

 *  battery good        0x02

 *

 * H    Hovering

 * S    Switch 1 (pen button)

 * T    Tip

 */

​

#include <linux/kernel.h>

#include <linux/module.h>

#include <linux/input.h>

#include <linux/usb/input.h>

#include <linux/slab.h>

#include <linux/workqueue.h>

#include <linux/mutex.h>

​

/* USB HID defines */

#define USB_REQ_GET_REPORT      0x01

#define USB_REQ_SET_REPORT      0x09

​

#define USB_VENDOR_ID_PEGASUSTECH   0x0e20

#define USB_DEVICE_ID_PEGASUS_NOTETAKER_EN100   0x0101

​

/* device specific defines */

#define NOTETAKER_REPORT_ID     0x02

#define NOTETAKER_SET_CMD       0x80

#define NOTETAKER_SET_MODE      0xb5

​

#define NOTETAKER_LED_MOUSE     0x02

#define PEN_MODE_XY         0x01

​

#define SPECIAL_COMMAND         0x80

#define BUTTON_PRESSED          0xb5

#define COMMAND_VERSION         0xa9