392 lines
12 KiB
C
392 lines
12 KiB
C
/* usb_dc.h - USB device controller driver interface */
|
|
|
|
/*
|
|
* 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.
|
|
*/
|
|
|
|
#pragma once
|
|
|
|
#include <stdint.h>
|
|
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
|
|
/**
|
|
* 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_SET_HALT, /* Set Feature ENDPOINT_HALT received */
|
|
USB_DC_CLEAR_HALT, /* Clear Feature ENDPOINT_HALT received */
|
|
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\>
|
|
*/
|
|
uint8_t ep_addr;
|
|
uint16_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)(uint8_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,
|
|
uint8_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 uint8_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 check endpoint capabilities
|
|
*
|
|
* Function to check capabilities of an endpoint. usb_dc_ep_cfg_data structure
|
|
* provides the endpoint configuration parameters: endpoint address,
|
|
* endpoint maximum packet size and endpoint type.
|
|
* The driver should check endpoint capabilities and return 0 if the
|
|
* endpoint configuration is possible.
|
|
*
|
|
* @param[in] cfg Endpoint config
|
|
*
|
|
* @return 0 on success, negative errno code on fail.
|
|
*/
|
|
int usb_dc_ep_check_cap(const struct usb_dc_ep_cfg_data *const cfg);
|
|
|
|
/**
|
|
* @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 uint8_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 uint8_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 uint8_t ep, uint8_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 uint8_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 uint8_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 uint8_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 uint8_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 uint8_t ep, const uint8_t *const data,
|
|
const uint32_t data_len, uint32_t *const ret_bytes);
|
|
|
|
|
|
|
|
/**
|
|
* @brief Indicate if the write to an IN endpoint (using usb_dc_ep_write) would block
|
|
* to wait until the endpoint has enoug space
|
|
*
|
|
* @param[in] ep Endpoint address corresponding to the one
|
|
* listed in the device configuration table
|
|
*
|
|
* @return 0 when writable, 0 when not, negative errno code on fail.
|
|
*/
|
|
int usb_dc_ep_write_would_block(const uint8_t ep);
|
|
|
|
|
|
/**
|
|
* @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 uint8_t ep, uint8_t *const data,
|
|
const uint32_t max_data_len, uint32_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 uint8_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(uint8_t ep, uint8_t *data, uint32_t max_data_len,
|
|
uint32_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(uint8_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(uint8_t ep);
|
|
|
|
|
|
|
|
//Hack - fake interrupts by pollinfg
|
|
void usb_dc_check_poll_for_interrupts(void);
|
|
|
|
|
|
//Prepare for USB persist. You should reboot after this.
|
|
int usb_dc_prepare_persist(void);
|
|
|
|
|
|
void usb_dw_isr_handler(void);
|
|
|
|
|
|
int usb_dc_ep_write_would_block(const uint8_t ep);
|
|
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|