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/*
* Tiny USB stack
* HID device driver
*
* Copyright (C) 2014 Michael Buesch <m@bues.ch>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* version 2 as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include "usb_hid.h"
#include "usb.h"
#include "util.h"
#include <string.h>
#include <avr/pgmspace.h>
/** struct hid_3bmouse_data - 3 button mouse wire protocol */
struct hid_3bmouse_data {
uint8_t buttons;
int8_t wheel;
int16_t x;
int16_t y;
} __attribute__((packed));
#define bSize0 0x00
#define bSize1 0x01
#define bSize2 0x02
#define bSize4 0x03
#define bTypeMain (0x00 << 2)
#define bTypeGlobal (0x01 << 2)
#define bTypeLocal (0x02 << 2)
#define bTypeReserved (0x03 << 2)
#define bTagShift 4
#define bTag(tag) ((tag) << bTagShift)
#define bit(bitNumber) (1 << (bitNumber))
#define le16(number) lo8(number), hi8(number)
static const uint8_t USB_PROGMEM hid_3buttonmouse_descriptor[] = {
/* Usage Page (Generic Desktop) */
bSize1 | bTypeGlobal | bTag(0x0), 0x01,
/* Usage (Mouse) */
bSize1 | bTypeLocal | bTag(0x0), 0x02,
/* Collection (Application) */
bSize1 | bTypeMain | bTag(0xA), 0x01,
/* Usage (Pointer) */
bSize1 | bTypeLocal | bTag(0x0), 0x01,
/* Collection (Physical) */
bSize1 | bTypeMain | bTag(0xA), 0x00,
/*** Buttons ***/
/* Usage Page (Buttons) */
bSize1 | bTypeGlobal | bTag(0x0), 0x09,
/* Usage Minimum */
bSize1 | bTypeLocal | bTag(0x1), 0x01,
/* Usage Maximum */
bSize1 | bTypeLocal | bTag(0x2), 0x03,
/* Logical Minimum */
bSize1 | bTypeGlobal | bTag(0x1), 0x00,
/* Logical Maximum */
bSize1 | bTypeGlobal | bTag(0x2), 0x01,
/* Report Count */
bSize1 | bTypeGlobal | bTag(0x9), 3,
/* Report Size */
bSize1 | bTypeGlobal | bTag(0x7), 1,
/* Input (Data, Variable, Absolute) */
bSize1 | bTypeMain | bTag(0x8), bit(1),
/*** Padding ***/
/* Report Count */
bSize1 | bTypeGlobal | bTag(0x9), 1,
/* Report Size */
bSize1 | bTypeGlobal | bTag(0x7), 5,
/* Input (Constant) */
bSize1 | bTypeMain | bTag(0x8), bit(0),
/*** Wheel ***/
/* Usage Page (Generic Desktop) */
bSize1 | bTypeGlobal | bTag(0x0), 0x01,
/* Usage (Wheel) */
bSize1 | bTypeLocal | bTag(0x0), 0x38,
/* Logical Minimum */
bSize1 | bTypeGlobal | bTag(0x1), -128,
/* Logical Maximum */
bSize1 | bTypeGlobal | bTag(0x2), 127,
/* Report Size */
bSize1 | bTypeGlobal | bTag(0x7), 8,
/* Report Count */
bSize1 | bTypeGlobal | bTag(0x9), 1,
/* Input (Data, Variable, Relative) */
bSize1 | bTypeMain | bTag(0x8), bit(1)|bit(2),
/*** X/Y Axis ***/
/* Usage Page (Generic Desktop) */
bSize1 | bTypeGlobal | bTag(0x0), 0x01,
/* Usage (X) */
bSize1 | bTypeLocal | bTag(0x0), 0x30,
/* Usage (Y) */
bSize1 | bTypeLocal | bTag(0x0), 0x31,
/* Logical Minimum */
bSize2 | bTypeGlobal | bTag(0x1), le16(-32768),
/* Logical Maximum */
bSize2 | bTypeGlobal | bTag(0x2), le16(32767),
/* Report Size */
bSize1 | bTypeGlobal | bTag(0x7), 16,
/* Report Count */
bSize1 | bTypeGlobal | bTag(0x9), 2,
/* Input (Data, Variable, Relative) */
bSize1 | bTypeMain | bTag(0x8), bit(1)|bit(2),
/* End Collection */
bSize0 | bTypeMain | bTag(0xC),
/* End Collection */
bSize0 | bTypeMain | bTag(0xC),
};
#define hid_descriptor hid_3buttonmouse_descriptor
uint16_t usb_hid_get_descriptor_length(void)
{
return sizeof(hid_descriptor);
}
void usb_hid_reset(void)
{
// usb_hid_ep2_txbuffer_empty();
}
uint8_t usb_hid_control_rx(struct usb_ctrl *ctl, uint8_t *reply_buf)
{
usb_print1num("HID: Received control frame", ctl->bRequest);
switch (ctl->bRequest) {
case USB_REQ_GET_INTERFACE:
/* Reply with a null frame */
return 0;
case USB_REQ_GET_DESCRIPTOR:
BUILD_BUG_ON(sizeof(hid_descriptor) > USBCFG_EP0_MAXSIZE);
usb_copy_from_pgm(reply_buf, hid_descriptor, sizeof(hid_descriptor));
return sizeof(hid_descriptor);
}
return USB_HID_UNHANDLED;
}
uint8_t usb_hid_ep1_rx(uint8_t *data, uint8_t size,
uint8_t *reply_buf)
{
usb_printstr("HID: Received EP1 frame\n");
return USB_HID_UNHANDLED;
}
uint8_t usb_hid_ep1_tx_poll(uint8_t *buf)
{
return 0;
}
uint8_t usb_hid_ep2_rx(uint8_t *data, uint8_t size,
uint8_t *reply_buf)
{
usb_printstr("HID: Received EP2 frame\n");
return USB_HID_UNHANDLED;
}
/* The interrupt endpoint buffer is empty.
* Refill it, so the next interrupt poll can fetch new data. */
uint8_t usb_hid_ep2_tx_poll(uint8_t *buf)
{
struct hid_3bmouse_data *d = (struct hid_3bmouse_data *)buf;
memset(d, 0, sizeof(*d));
/* TODO: Test. Move the cursor towards the upper left. */
d->x = -1;
d->y = -1;
return sizeof(*d);
}
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