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/*
* This file is part of the libusbhost library
* hosted at http://github.com/libusbhost/libusbhost
*
* Copyright (C) 2015 Amir Hammad <amir.hammad@hotmail.com>
*
*
* libusbhost is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This library 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this library. If not, see <http://www.gnu.org/licenses/>.
*
*/
#ifndef USBH_DEVICE_DRIVER_
#define USBH_DEVICE_DRIVER_
#include "usbh_config.h"
#include "usbh_hubbed.h"
#include <stdint.h>
BEGIN_DECLS
#define USBH_EPTYP_CONTROL (0)
#define USBH_EPTYP_ISOCHRONOUS (1)
#define USBH_EPTYP_BULK (2)
#define USBH_EPTYP_INTERRUPT (3)
#define USBH_SPEED_FULL (0)
#define USBH_SPEED_LOW (1)
#define USBH_SPEED_HIGH (2)
enum USBH_PACKET_CALLBACK_STATUS {
USBH_PACKET_CALLBACK_STATUS_OK = 0,
USBH_PACKET_CALLBACK_STATUS_ERRSIZ = 1,
USBH_PACKET_CALLBACK_STATUS_EAGAIN = 2, // -- TODO: automatic handling of transmit errors 3xTXERR->FATAL
USBH_PACKET_CALLBACK_STATUS_EFATAL = 3
};
enum USBH_POLL_STATUS {
USBH_POLL_STATUS_NONE,
USBH_POLL_STATUS_DEVICE_CONNECTED,
USBH_POLL_STATUS_DEVICE_DISCONNECTED
};
struct _usbh_device {
uint16_t packet_size_max0;
int8_t address;
uint8_t speed; // (USBH_SPEED_*)
uint8_t state; // for enumeration purposes
uint8_t toggle0;
const usbh_dev_driver_t *drv;
void *drvdata;
const void *lld;
};
typedef struct _usbh_device usbh_device_t;
struct _usbh_packet_callback_data {
enum USBH_PACKET_CALLBACK_STATUS status;
uint32_t transferred_length;
};
typedef struct _usbh_packet_callback_data usbh_packet_callback_data_t;
typedef void (*usbh_packet_callback_t)(usbh_device_t *dev, usbh_packet_callback_data_t status);
struct _usbh_packet {
void *data; // Pointer to data
uint16_t datalen; // Data length 0..1023
int8_t address; // Device address
uint8_t endpoint_type; // Endpoint type (see USBH_EPTYP_*)
uint8_t endpoint_address; // Endpoint number 0..15
uint16_t endpoint_size_max; // Max packet size for an endpoint
uint8_t speed; // (USBH_SPEED_*)
uint8_t *toggle;
usbh_packet_callback_t callback;
void *callback_arg;
};
typedef struct _usbh_packet usbh_packet_t;
struct _usbh_driver {
void (*init)(void *drvdata);
void (*write)(void *drvdata, const usbh_packet_t *packet);
void (*read)(void *drvdata, usbh_packet_t *packet);
enum USBH_POLL_STATUS (*poll)(void *drvdata, uint32_t time_curr_us);
uint8_t (*root_speed)(void *drvdata);
// Pointer to Low-level driver data
void *driver_data;
};
typedef struct _usbh_driver usbh_driver_t;
struct _usbh_generic_data {
usbh_device_t usbh_device[USBH_MAX_DEVICES];
uint8_t usbh_buffer[BUFFER_ONE_BYTES];
};
typedef struct _usbh_generic_data usbh_generic_data_t;
#define ERROR(arg) LOG_PRINTF("UNHANDLED_ERROR %d: file: %s, line: %d",\
arg, __FILE__, __LINE__)
/// Hub related functions
usbh_device_t *usbh_get_free_device(const usbh_device_t *dev);
bool usbh_enum_available(void);
void device_enumeration_start(usbh_device_t *dev);
/// All devices functions
///
void usbh_read(usbh_device_t *dev, usbh_packet_t *packet);
void usbh_write(usbh_device_t *dev, const usbh_packet_t *packet);
/// Helper functions
void device_xfer_control_read(void *data, uint16_t datalen, usbh_packet_callback_t callback, usbh_device_t *dev);
void device_xfer_control_write(void *data, uint16_t datalen, usbh_packet_callback_t callback, usbh_device_t *dev);
END_DECLS
#endif
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