include/dev/udc.h

/*
 * Copyright (c) 2009, Google Inc.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *  * Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *  * Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the 
 *    distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 
 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#ifndef __DEV_UDC_H
#define __DEV_UDC_H

/* USB Device Controller Transfer Request */
struct udc_request {
	void *buf;
	unsigned length;
	void (*complete)(struct udc_request *req, unsigned actual, int status);
	void *context;
};

/* endpoints are opaque handles specific to the particular device controller */
struct udc_endpoint;

struct udc_request *udc_request_alloc(void);
void udc_request_free(struct udc_request *req);
int udc_request_queue(struct udc_endpoint *ept, struct udc_request *req);
int udc_request_cancel(struct udc_endpoint *ept, struct udc_request *req);

#define UDC_TYPE_BULK_IN	1
#define UDC_TYPE_BULK_OUT	2

struct udc_endpoint *udc_endpoint_alloc(unsigned type, unsigned maxpkt);
void udc_endpoint_free(struct udc_endpoint *ept);

#define UDC_EVENT_ONLINE	1
#define UDC_EVENT_OFFLINE	2

struct udc_gadget {
	void (*notify)(struct udc_gadget *gadget, unsigned event);
	void *context;

	unsigned char ifc_class;
	unsigned char ifc_subclass;
	unsigned char ifc_protocol;
	unsigned char ifc_endpoints;
	const char *ifc_string;
	unsigned flags;

	struct udc_endpoint **ept;
};

struct udc_device {
	unsigned short vendor_id;
	unsigned short product_id;
	unsigned short version_id;

	const char *manufacturer;
	const char *product;
	const char *serialno;
};
	
int udc_init(struct udc_device *devinfo);
int udc_register_gadget(struct udc_gadget *gadget);
int udc_start(void);
int udc_stop(void);

/* these should probably go elsewhere */
#define GET_STATUS           0
#define CLEAR_FEATURE        1
#define SET_FEATURE          3
#define SET_ADDRESS          5
#define GET_DESCRIPTOR       6
#define SET_DESCRIPTOR       7
#define GET_CONFIGURATION    8
#define SET_CONFIGURATION    9
#define GET_INTERFACE        10
#define SET_INTERFACE        11
#define SYNCH_FRAME          12

#define TYPE_DEVICE          1
#define TYPE_CONFIGURATION   2
#define TYPE_STRING          3
#define TYPE_INTERFACE       4
#define TYPE_ENDPOINT        5

#define DEVICE_READ          0x80
#define DEVICE_WRITE         0x00
#define INTERFACE_READ       0x81
#define INTERFACE_WRITE      0x01
#define ENDPOINT_READ        0x82
#define ENDPOINT_WRITE       0x02

struct setup_packet {
	unsigned char type;
	unsigned char request;
	unsigned short value;
	unsigned short index;
	unsigned short length;
} __attribute__ ((packed));

#endif