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/*
* This file is part of the libpayload project.
*
* Copyright (C) 2015 Google Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. 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.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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 __UDC_H__
#define __UDC_H__
#include <queue.h>
#include <usb/usb.h>
struct usbdev_ctrl;
struct usbdev_interface {
interface_descriptor_t descriptor;
void (*init)(struct usbdev_ctrl *);
/**
* handle_packet: called by the controller driver for incoming packets
*
* @param ep endpoint the packet is for
*
* @param in_dir 1, if it's an IN or INTR transfer.
* 0 for OUT, SETUP is handled in handle_setup
*
* @param len Actual transfer length in bytes. Can differ from the
* scheduled length if the host requested a smaller
* transfer than we prepared for.
*/
void (*handle_packet)(struct usbdev_ctrl *, int ep, int in_dir,
void *data, int len);
/**
* handle_setup: called by the controller driver for setup packets
*
* @param ep endpoint the SETUP request came up on
* @param dr SETUP request data
*/
int (*handle_setup)(struct usbdev_ctrl *, int ep, dev_req_t *dr);
endpoint_descriptor_t *eps;
};
struct usbdev_configuration {
configuration_descriptor_t descriptor;
SLIST_ENTRY(usbdev_configuration) list;
struct usbdev_interface interfaces[];
};
SLIST_HEAD(configuration_list, usbdev_configuration);
struct usbdev_ctrl {
/* private data */
void *pdata;
int initialized;
int remote_wakeup;
struct usbdev_configuration *current_config;
struct usbdev_interface *current_iface;
int current_config_id;
struct configuration_list configs;
int config_count;
device_descriptor_t device_descriptor;
int ep_halted[16][2];
int ep_mps[16][2];
/** returns 0 if an error occurred */
int (*poll)(struct usbdev_ctrl *);
/**
* Add a gadget driver that exposes properties described in config.
*
* Each gadget driver is registered and exposed as separate USB
* "configuration", so the host can choose between them.
*/
void (*add_gadget)(struct usbdev_ctrl *,
struct usbdev_configuration *config);
/**
* Add a set of strings to use for string descriptors.
*
* 's' must point to an array of strings of which the first
* element is unused, with at most 255 elements.
*
* 'm' is the size of 'strings' (ie. the index of the last entry).
*
* 'l' is the USB language code, of which some are defined below,
* eg. LANG_EN_US.
*
* For now, only one language is ever exposed: Calling add_strings overwrites
* older configuration.
*/
void (*add_strings)(unsigned short l, unsigned char m, const char **s);
/**
* Add packet to process by the controller.
* zlp: zero length packet, if such a termination is necessary
* autofree: free data after use
*/
void (*enqueue_packet)(struct usbdev_ctrl *this, int endpoint,
int in_dir, void *data, int len, int zlp, int autofree);
/**
* Tell the hardware that it should listen to a new address
*/
void (*set_address)(struct usbdev_ctrl *, int address);
void (*halt_ep)(struct usbdev_ctrl *this, int ep, int in_dir);
void (*start_ep)(struct usbdev_ctrl *this,
int ep, int in_dir, int ep_type, int mps);
/**
* Set or clear endpoint ep's STALL state
*/
void (*stall)(struct usbdev_ctrl *, uint8_t ep, int in_dir, int set);
/**
* Disable controller and deallocate data structures.
*/
void (*force_shutdown)(struct usbdev_ctrl *this);
/**
* Let queues run out, then disable controller and deallocate data
* structures.
*/
void (*shutdown)(struct usbdev_ctrl *this);
/**
* Allocate n bytes for use as data
*/
void *(*alloc_data)(size_t n);
/**
* Free memory object allocated with alloc_data()
*/
void (*free_data)(void *);
};
#define LANG_DE_DE 0x0407
#define LANG_EN_US 0x0409
void udc_add_gadget(struct usbdev_ctrl *this,
struct usbdev_configuration *config);
void udc_add_strings(unsigned short id, unsigned char count,
const char *strings[]);
void udc_handle_setup(struct usbdev_ctrl *this, int ep, dev_req_t *dr);
#endif
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