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/*
* Copyright (c) 2016 Intel Corporation.
*
* SPDX-License-Identifier: Apache-2.0
*/
/**
* @file
* @brief USB device controller APIs
*
* This file contains the USB device controller APIs. All device controller
* drivers should implement the APIs described in this file.
*/
#ifndef __USB_DC_H__
#define __USB_DC_H__
#include <device.h>
/**
* USB endpoint direction and number.
*/
#define USB_EP_DIR_MASK 0x80
#define USB_EP_DIR_IN 0x80
#define USB_EP_DIR_OUT 0x00
/**
* USB Driver Status Codes
*/
enum usb_dc_status_code {
USB_DC_ERROR, /* USB error reported by the controller */
USB_DC_RESET, /* USB reset */
/* USB connection established, hardware enumeration is completed */
USB_DC_CONNECTED,
USB_DC_CONFIGURED, /* USB configuration done */
USB_DC_DISCONNECTED, /* USB connection lost */
USB_DC_SUSPEND, /* USB connection suspended by the HOST */
USB_DC_RESUME, /* USB connection resumed by the HOST */
USB_DC_INTERFACE, /* USB interface selected */
USB_DC_UNKNOWN /* Initial USB connection status */
};
/**
* USB Endpoint Callback Status Codes
*/
enum usb_dc_ep_cb_status_code {
USB_DC_EP_SETUP, /* SETUP received */
/* Out transaction on this EP, data is available for read */
USB_DC_EP_DATA_OUT,
USB_DC_EP_DATA_IN, /* In transaction done on this EP */
};
/**
* USB Endpoint type
*/
enum usb_dc_ep_type {
USB_DC_EP_CONTROL = 0, /* Control type endpoint */
USB_DC_EP_ISOCHRONOUS, /* Isochronous type endpoint */
USB_DC_EP_BULK, /* Bulk type endpoint */
USB_DC_EP_INTERRUPT /* Interrupt type endpoint */
};
/**
* USB Endpoint Configuration.
*/
struct usb_dc_ep_cfg_data {
/** The number associated with the EP in the device
* configuration structure
* IN EP = 0x80 | \<endpoint number\>
* OUT EP = 0x00 | \<endpoint number\>
*/
u8_t ep_addr;
u16_t ep_mps; /** Endpoint max packet size */
enum usb_dc_ep_type ep_type; /** Endpoint type */
};
/**
* Callback function signature for the USB Endpoint status
*/
typedef void (*usb_dc_ep_callback)(u8_t ep,
enum usb_dc_ep_cb_status_code cb_status);
/**
* Callback function signature for the device
*/
typedef void (*usb_dc_status_callback)(enum usb_dc_status_code cb_status,
u8_t *param);
/**
* @brief attach USB for device connection
*
* Function to attach USB for device connection. Upon success, the USB PLL
* is enabled, and the USB device is now capable of transmitting and receiving
* on the USB bus and of generating interrupts.
*
* @return 0 on success, negative errno code on fail.
*/
int usb_dc_attach(void);
/**
* @brief detach the USB device
*
* Function to detach the USB device. Upon success, the USB hardware PLL
* is powered down and USB communication is disabled.
*
* @return 0 on success, negative errno code on fail.
*/
int usb_dc_detach(void);
/**
* @brief reset the USB device
*
* This function returns the USB device and firmware back to it's initial state.
* N.B. the USB PLL is handled by the usb_detach function
*
* @return 0 on success, negative errno code on fail.
*/
int usb_dc_reset(void);
/**
* @brief set USB device address
*
* @param[in] addr device address
*
* @return 0 on success, negative errno code on fail.
*/
int usb_dc_set_address(const u8_t addr);
/**
* @brief set USB device controller status callback
*
* Function to set USB device controller status callback. The registered
* callback is used to report changes in the status of the device controller.
*
* @param[in] cb callback function
*
* @return 0 on success, negative errno code on fail.
*/
int usb_dc_set_status_callback(const usb_dc_status_callback cb);
/**
* @brief configure endpoint
*
* Function to configure an endpoint. usb_dc_ep_cfg_data structure provides
* the endpoint configuration parameters: endpoint address, endpoint maximum
* packet size and endpoint type.
*
* @param[in] cfg Endpoint config
*
* @return 0 on success, negative errno code on fail.
*/
int usb_dc_ep_configure(const struct usb_dc_ep_cfg_data * const cfg);
/**
* @brief set stall condition for the selected endpoint
*
* @param[in] ep Endpoint address corresponding to the one
* listed in the device configuration table
*
* @return 0 on success, negative errno code on fail.
*/
int usb_dc_ep_set_stall(const u8_t ep);
/**
* @brief clear stall condition for the selected endpoint
*
* @param[in] ep Endpoint address corresponding to the one
* listed in the device configuration table
*
* @return 0 on success, negative errno code on fail.
*/
int usb_dc_ep_clear_stall(const u8_t ep);
/**
* @brief check if selected endpoint is stalled
*
* @param[in] ep Endpoint address corresponding to the one
* listed in the device configuration table
* @param[out] stalled Endpoint stall status
*
* @return 0 on success, negative errno code on fail.
*/
int usb_dc_ep_is_stalled(const u8_t ep, u8_t *const stalled);
/**
* @brief halt the selected endpoint
*
* @param[in] ep Endpoint address corresponding to the one
* listed in the device configuration table
*
* @return 0 on success, negative errno code on fail.
*/
int usb_dc_ep_halt(const u8_t ep);
/**
* @brief enable the selected endpoint
*
* Function to enable the selected endpoint. Upon success interrupts are
* enabled for the corresponding endpoint and the endpoint is ready for
* transmitting/receiving data.
*
* @param[in] ep Endpoint address corresponding to the one
* listed in the device configuration table
*
* @return 0 on success, negative errno code on fail.
*/
int usb_dc_ep_enable(const u8_t ep);
/**
* @brief disable the selected endpoint
*
* Function to disable the selected endpoint. Upon success interrupts are
* disabled for the corresponding endpoint and the endpoint is no longer able
* for transmitting/receiving data.
*
* @param[in] ep Endpoint address corresponding to the one
* listed in the device configuration table
*
* @return 0 on success, negative errno code on fail.
*/
int usb_dc_ep_disable(const u8_t ep);
/**
* @brief flush the selected endpoint
*
* @param[in] ep Endpoint address corresponding to the one
* listed in the device configuration table
*
* @return 0 on success, negative errno code on fail.
*/
int usb_dc_ep_flush(const u8_t ep);
/**
* @brief write data to the specified endpoint
*
* This function is called to write data to the specified endpoint. The supplied
* usb_ep_callback function will be called when data is transmitted out.
*
* @param[in] ep Endpoint address corresponding to the one
* listed in the device configuration table
* @param[in] data pointer to data to write
* @param[in] data_len length of data requested to write. This may
* be zero for a zero length status packet.
* @param[out] ret_bytes bytes scheduled for transmission. This value
* may be NULL if the application expects all
* bytes to be written
*
* @return 0 on success, negative errno code on fail.
*/
int usb_dc_ep_write(const u8_t ep, const u8_t *const data,
const u32_t data_len, u32_t * const ret_bytes);
/**
* @brief read data from the specified endpoint
*
* This function is called by the Endpoint handler function, after an OUT
* interrupt has been received for that EP. The application must only call this
* function through the supplied usb_ep_callback function. This function clears
* the ENDPOINT NAK, if all data in the endpoint FIFO has been read,
* so as to accept more data from host.
*
* @param[in] ep Endpoint address corresponding to the one
* listed in the device configuration table
* @param[in] data pointer to data buffer to write to
* @param[in] max_data_len max length of data to read
* @param[out] read_bytes Number of bytes read. If data is NULL and
* max_data_len is 0 the number of bytes
* available for read should be returned.
*
* @return 0 on success, negative errno code on fail.
*/
int usb_dc_ep_read(const u8_t ep, u8_t *const data,
const u32_t max_data_len, u32_t *const read_bytes);
/**
* @brief set callback function for the specified endpoint
*
* Function to set callback function for notification of data received and
* available to application or transmit done on the selected endpoint,
* NULL if callback not required by application code.
*
* @param[in] ep Endpoint address corresponding to the one
* listed in the device configuration table
* @param[in] cb callback function
*
* @return 0 on success, negative errno code on fail.
*/
int usb_dc_ep_set_callback(const u8_t ep, const usb_dc_ep_callback cb);
/**
* @brief read data from the specified endpoint
*
* This is similar to usb_dc_ep_read, the difference being that, it doesn't
* clear the endpoint NAKs so that the consumer is not bogged down by further
* upcalls till he is done with the processing of the data. The caller should
* reactivate ep by invoking usb_dc_ep_read_continue() do so.
*
* @param[in] ep Endpoint address corresponding to the one
* listed in the device configuration table
* @param[in] data pointer to data buffer to write to
* @param[in] max_data_len max length of data to read
* @param[out] read_bytes Number of bytes read. If data is NULL and
* max_data_len is 0 the number of bytes
* available for read should be returned.
*
* @return 0 on success, negative errno code on fail.
*/
int usb_dc_ep_read_wait(u8_t ep, u8_t *data, u32_t max_data_len,
u32_t *read_bytes);
/**
* @brief Continue reading data from the endpoint
*
* Clear the endpoint NAK and enable the endpoint to accept more data
* from the host. Usually called after usb_dc_ep_read_wait() when the consumer
* is fine to accept more data. Thus these calls together acts as flow control
* mechanism.
*
* @param[in] ep Endpoint address corresponding to the one
* listed in the device configuration table
*
* @return 0 on success, negative errno code on fail.
*/
int usb_dc_ep_read_continue(u8_t ep);
/**
* @brief Get endpoint max packet size
*
* @param[in] ep Endpoint address corresponding to the one
* listed in the device configuration table
*
* @return enpoint max packet size (mps)
*/
int usb_dc_ep_mps(u8_t ep);
#endif /* __USB_DC_H__ */
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