sw/device/lib/dif/autogen/dif_usbdev_autogen.h

// Copyright lowRISC contributors.
// Licensed under the Apache License, Version 2.0, see LICENSE for details.
// SPDX-License-Identifier: Apache-2.0

#ifndef OPENTITAN_SW_DEVICE_LIB_DIF_AUTOGEN_DIF_USBDEV_AUTOGEN_H_
#define OPENTITAN_SW_DEVICE_LIB_DIF_AUTOGEN_DIF_USBDEV_AUTOGEN_H_

// THIS FILE HAS BEEN GENERATED, DO NOT EDIT MANUALLY. COMMAND:
// util/make_new_dif.py --mode=regen --only=autogen

/**
 * @file
 * @brief <a href="/hw/ip/usbdev/doc/">USBDEV</a> Device Interface Functions
 */

#include <stdbool.h>
#include <stdint.h>

#include "sw/device/lib/base/macros.h"
#include "sw/device/lib/base/mmio.h"
#include "sw/device/lib/dif/dif_base.h"

#ifdef __cplusplus
extern "C" {
#endif  // __cplusplus

/**
 * A handle to usbdev.
 *
 * This type should be treated as opaque by users.
 */
typedef struct dif_usbdev {
  /**
   * The base address for the usbdev hardware registers.
   */
  mmio_region_t base_addr;
} dif_usbdev_t;

/**
 * Creates a new handle for a(n) usbdev peripheral.
 *
 * This function does not actuate the hardware.
 *
 * @param base_addr The MMIO base address of the usbdev peripheral.
 * @param[out] usbdev Out param for the initialized handle.
 * @return The result of the operation.
 */
OT_WARN_UNUSED_RESULT
dif_result_t dif_usbdev_init(mmio_region_t base_addr, dif_usbdev_t *usbdev);

/**
 * A usbdev alert type.
 */
typedef enum dif_usbdev_alert {
  /**
   * This fatal alert is triggered when a fatal TL-UL bus integrity fault is
   * detected.
   */
  kDifUsbdevAlertFatalFault = 0,
} dif_usbdev_alert_t;

/**
 * Forces a particular alert, causing it to be escalated as if the hardware
 * had raised it.
 *
 * @param usbdev A usbdev handle.
 * @param alert The alert to force.
 * @return The result of the operation.
 */
OT_WARN_UNUSED_RESULT
dif_result_t dif_usbdev_alert_force(const dif_usbdev_t *usbdev,
                                    dif_usbdev_alert_t alert);

/**
 * A usbdev interrupt request type.
 */
typedef enum dif_usbdev_irq {
  /**
   * Raised if a packet was received using an OUT or SETUP transaction. This
   * interrupt is directly tied to whether the RX FIFO is empty, so it should be
   * cleared only after handling the FIFO entry.
   */
  kDifUsbdevIrqPktReceived = 0,
  /**
   * Raised if a packet was sent as part of an IN transaction. This interrupt is
   * directly tied to whether a sent packet has not been acknowledged in the
   * !!in_sent register. It should be cleared only after clearing all bits in
   * the !!in_sent register.
   */
  kDifUsbdevIrqPktSent = 1,
  /**
   * Raised if VBUS is lost thus the link is disconnected.
   */
  kDifUsbdevIrqDisconnected = 2,
  /**
   * Raised if link is active but SOF was not received from host for 4.096 ms.
   * The SOF should be every 1 ms.
   */
  kDifUsbdevIrqHostLost = 3,
  /**
   * Raised if the link is at SE0 longer than 3 us indicating a link reset (host
   * asserts for min 10 ms, device can react after 2.5 us).
   */
  kDifUsbdevIrqLinkReset = 4,
  /**
   * Raised if the line has signaled J for longer than 3ms and is therefore in
   * suspend state.
   */
  kDifUsbdevIrqLinkSuspend = 5,
  /**
   * Raised when the link becomes active again after being suspended.
   */
  kDifUsbdevIrqLinkResume = 6,
  /**
   * Raised when the AV FIFO is empty and the device interface is enabled. This
   * interrupt is directly tied to the FIFO status, so the AV FIFO must be
   * provided a free buffer before the interrupt is cleared. If the condition is
   * not cleared, the interrupt can re-assert.
   */
  kDifUsbdevIrqAvEmpty = 7,
  /**
   * Raised when the RX FIFO is full and the device interface is enabled. This
   * interrupt is directly tied to the FIFO status, so the RX FIFO must have an
   * entry removed before the interrupt is cleared. If the condition is not
   * cleared, the interrupt can re-assert.
   */
  kDifUsbdevIrqRxFull = 8,
  /**
   * Raised if a write was done to the Available Buffer FIFO when the FIFO was
   * full.
   */
  kDifUsbdevIrqAvOverflow = 9,
  /**
   * Raised if a packet to an IN endpoint started to be received but was then
   * dropped due to an error. After transmitting the IN payload, the USB device
   * expects a valid ACK handshake packet. This error is raised if either the
   * packet or CRC is invalid or a different token was received.
   */
  kDifUsbdevIrqLinkInErr = 10,
  /**
   * Raised if a CRC error occured.
   */
  kDifUsbdevIrqRxCrcErr = 11,
  /**
   * Raised if an invalid packed identifier (PID) was received.
   */
  kDifUsbdevIrqRxPidErr = 12,
  /**
   * Raised if an invalid bitstuffing was received.
   */
  kDifUsbdevIrqRxBitstuffErr = 13,
  /**
   * Raised when the USB frame number is updated with a valid SOF.
   */
  kDifUsbdevIrqFrame = 14,
  /**
   * Raised if VBUS is applied.
   */
  kDifUsbdevIrqPowered = 15,
  /**
   * Raised if a packet to an OUT endpoint started to be received but was then
   * dropped due to an error. This error is raised if either the data toggle,
   * token, packet or CRC is invalid or if there is no buffer available in the
   * Received Buffer FIFO.
   */
  kDifUsbdevIrqLinkOutErr = 16,
} dif_usbdev_irq_t;

/**
 * A snapshot of the state of the interrupts for this IP.
 *
 * This is an opaque type, to be used with the `dif_usbdev_irq_get_state()`
 * function.
 */
typedef uint32_t dif_usbdev_irq_state_snapshot_t;

/**
 * Returns the state of all interrupts (i.e., pending or not) for this IP.
 *
 * @param usbdev A usbdev handle.
 * @param[out] snapshot Out-param for interrupt state snapshot.
 * @return The result of the operation.
 */
OT_WARN_UNUSED_RESULT
dif_result_t dif_usbdev_irq_get_state(
    const dif_usbdev_t *usbdev, dif_usbdev_irq_state_snapshot_t *snapshot);

/**
 * Returns whether a particular interrupt is currently pending.
 *
 * @param usbdev A usbdev handle.
 * @param irq An interrupt request.
 * @param[out] is_pending Out-param for whether the interrupt is pending.
 * @return The result of the operation.
 */
OT_WARN_UNUSED_RESULT
dif_result_t dif_usbdev_irq_is_pending(const dif_usbdev_t *usbdev,
                                       dif_usbdev_irq_t irq, bool *is_pending);

/**
 * Acknowledges all interrupts, indicating to the hardware that all
 * interrupts have been successfully serviced.
 *
 * @param usbdev A usbdev handle.
 * @return The result of the operation.
 */
OT_WARN_UNUSED_RESULT
dif_result_t dif_usbdev_irq_acknowledge_all(const dif_usbdev_t *usbdev);

/**
 * Acknowledges a particular interrupt, indicating to the hardware that it has
 * been successfully serviced.
 *
 * @param usbdev A usbdev handle.
 * @param irq An interrupt request.
 * @return The result of the operation.
 */
OT_WARN_UNUSED_RESULT
dif_result_t dif_usbdev_irq_acknowledge(const dif_usbdev_t *usbdev,
                                        dif_usbdev_irq_t irq);

/**
 * Forces a particular interrupt, causing it to be serviced as if hardware had
 * asserted it.
 *
 * @param usbdev A usbdev handle.
 * @param irq An interrupt request.
 * @return The result of the operation.
 */
OT_WARN_UNUSED_RESULT
dif_result_t dif_usbdev_irq_force(const dif_usbdev_t *usbdev,
                                  dif_usbdev_irq_t irq);

/**
 * A snapshot of the enablement state of the interrupts for this IP.
 *
 * This is an opaque type, to be used with the
 * `dif_usbdev_irq_disable_all()` and `dif_usbdev_irq_restore_all()`
 * functions.
 */
typedef uint32_t dif_usbdev_irq_enable_snapshot_t;

/**
 * Checks whether a particular interrupt is currently enabled or disabled.
 *
 * @param usbdev A usbdev handle.
 * @param irq An interrupt request.
 * @param[out] state Out-param toggle state of the interrupt.
 * @return The result of the operation.
 */
OT_WARN_UNUSED_RESULT
dif_result_t dif_usbdev_irq_get_enabled(const dif_usbdev_t *usbdev,
                                        dif_usbdev_irq_t irq,
                                        dif_toggle_t *state);

/**
 * Sets whether a particular interrupt is currently enabled or disabled.
 *
 * @param usbdev A usbdev handle.
 * @param irq An interrupt request.
 * @param state The new toggle state for the interrupt.
 * @return The result of the operation.
 */
OT_WARN_UNUSED_RESULT
dif_result_t dif_usbdev_irq_set_enabled(const dif_usbdev_t *usbdev,
                                        dif_usbdev_irq_t irq,
                                        dif_toggle_t state);

/**
 * Disables all interrupts, optionally snapshotting all enable states for later
 * restoration.
 *
 * @param usbdev A usbdev handle.
 * @param[out] snapshot Out-param for the snapshot; may be `NULL`.
 * @return The result of the operation.
 */
OT_WARN_UNUSED_RESULT
dif_result_t dif_usbdev_irq_disable_all(
    const dif_usbdev_t *usbdev, dif_usbdev_irq_enable_snapshot_t *snapshot);

/**
 * Restores interrupts from the given (enable) snapshot.
 *
 * @param usbdev A usbdev handle.
 * @param snapshot A snapshot to restore from.
 * @return The result of the operation.
 */
OT_WARN_UNUSED_RESULT
dif_result_t dif_usbdev_irq_restore_all(
    const dif_usbdev_t *usbdev,
    const dif_usbdev_irq_enable_snapshot_t *snapshot);

#ifdef __cplusplus
}  // extern "C"
#endif  // __cplusplus

#endif  // OPENTITAN_SW_DEVICE_LIB_DIF_AUTOGEN_DIF_USBDEV_AUTOGEN_H_