// Copyright 2017 The Fuchsia Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#pragma once

// Transfer Request Block
typedef struct {
    uint32_t ptr_low;
    uint32_t ptr_high;
    uint32_t status;
    uint32_t control;
} __PACKED dwc3_trb_t;

// TRB status fields
#define TRB_BUFSIZ_START    0           // Buffer Size
#define TRB_BUFSIZ_BITS     24
#define TRB_BUFSIZ(n)       (((n) & 0xffffff) << 0)
#define TRB_PCM1_START      24          // Packet Count M1
#define TRB_PCM1_BITS       2
#define TRB_SPR             (1 << 26)   // Short Packet Received
#define TRB_TRBSTS_START    28          // TRB Status
#define TRB_TRBSTS_BITS     4

// TRB control fields
#define TRB_HWO                 (1 << 0)   // Hardware Owner of Descriptor
#define TRB_LST                 (1 << 1)   // Last TRB
#define TRB_CHN                 (1 << 2)   // Chain Buffers
#define TRB_CSP                 (1 << 3)   // Continue on Short Packet
#define TRB_TRBCTL_START        4
#define TRB_TRBCTL_BITS         5
#define TRB_TRBCTL(c)           ((c) & (((1 << TRB_TRBCTL_BITS) - 1) << TRB_TRBCTL_START))
#define TRB_TRBCTL_NORMAL       (1 << TRB_TRBCTL_START)
#define TRB_TRBCTL_SETUP        (2 << TRB_TRBCTL_START)
#define TRB_TRBCTL_STATUS_2     (3 << TRB_TRBCTL_START)
#define TRB_TRBCTL_STATUS_3     (4 << TRB_TRBCTL_START)
#define TRB_TRBCTL_CONTROL_DATA (5 << TRB_TRBCTL_START)
#define TRB_TRBCTL_ISOCH_FIRST  (6 << TRB_TRBCTL_START)
#define TRB_TRBCTL_ISOCH        (7 << TRB_TRBCTL_START)
#define TRB_TRBCTL_LINK         (8 << TRB_TRBCTL_START)
#define TRB_ISP                 (1 << 10)  // Interrupt on Short Packet
#define TRB_IMI                 (1 << 10)  // Interrupt on Missed ISOC
#define TRB_IOC                 (1 << 11)  // Interrupt on Complete
#define TRB_STREAM_ID_START     14          // Stream ID
#define TRB_STREAM_ID_BITS      16
#define TRB_SOF_NUM_START       14          // SOF Number
#define TRB_SOF_NUM_BITS        16

// DEPEVT (endpoint specific)
#define DEPEVT_PARAMS_START         16          // Event Parameters
#define DEPEVT_PARAMS_BITS          16
#define DEPEVT_STATUS_START         12          // Event Status
#define DEPEVT_STATUS_BITS          4
#define DEPEVT_TYPE_START           6           // Event Type
#define DEPEVT_TYPE_BITS            4
#define DEPEVT_PHYS_EP_START        1
#define DEPEVT_PHYS_EP_BITS         5
#define DEPEVT_NON_EP               (1 << 0)    // Event is not endpoint specific 

#define DEPEVT_PARAMS(e)            (((e) >> DEPEVT_PARAMS_START) & ((1 << DEPEVT_PARAMS_BITS) - 1))
#define DEPEVT_STATUS(e)            (((e) >> DEPEVT_STATUS_START) & ((1 << DEPEVT_STATUS_BITS) - 1))
#define DEPEVT_TYPE(e)              (((e) >> DEPEVT_TYPE_START) & ((1 << DEPEVT_TYPE_BITS) - 1))
#define DEPEVT_PHYS_EP(e)           (((e) >> DEPEVT_PHYS_EP_START) & \
                                     ((1 << DEPEVT_PHYS_EP_BITS) - 1))

// event parameters for DEPEVT_CMD_CMPLT
#define DEPEVT_CMD_CMPLT_CMD_TYPE_START     24
#define DEPEVT_CMD_CMPLT_CMD_TYPE_BITS      4
#define DEPEVT_CMD_CMPLT_CMD_TYPE(e)        (((e) >> DEPEVT_CMD_CMPLT_CMD_TYPE_START) & \
                                             ((1 << DEPEVT_CMD_CMPLT_CMD_TYPE_BITS) - 1))
#define DEPEVT_CMD_CMPLT_RSRC_ID_START      16
#define DEPEVT_CMD_CMPLT_RSRC_ID_BITS       7
#define DEPEVT_CMD_CMPLT_RSRC_ID(e)         (((e) >> DEPEVT_CMD_CMPLT_RSRC_ID_START) & \
                                             ((1 << DEPEVT_CMD_CMPLT_RSRC_ID_BITS) - 1))

// event parameters for DEPEVT_XFER_NOT_READY
#define DEPEVT_XFER_NOT_READY_REASON        (1 << 15)
#define DEPEVT_XFER_NOT_READY_STAGE_START   12
#define DEPEVT_XFER_NOT_READY_STAGE_BITS    2
#define DEPEVT_XFER_NOT_READY_STAGE(e)      (((e) >> DEPEVT_XFER_NOT_READY_STAGE_START) & \
                                             ((1 << DEPEVT_XFER_NOT_READY_STAGE_BITS) - 1))
#define DEPEVT_XFER_NOT_READY_STAGE_DATA    1
#define DEPEVT_XFER_NOT_READY_STAGE_STATUS  2


// DEPEVT event types
#define DEPEVT_XFER_COMPLETE        1
#define DEPEVT_XFER_IN_PROGRESS     2
#define DEPEVT_XFER_NOT_READY       3
#define DEPEVT_STREAM_EVT           6
#define DEPEVT_CMD_CMPLT            7

// DEVT (device specific)
#define DEVT_INFO_START             16          // Event Information Bits
#define DEVT_INFO_BITS              16
#define DEVT_TYPE_START             8           // Event type
#define DEVT_TYPE_BITS              7
#define DEVT_NON_EP                 (1 << 0)    // Event is not endpoint specific

#define DEVT_INFO(e)                (((e) >> DEVT_INFO_START) & ((1 << DEVT_INFO_BITS) - 1))
#define DEVT_TYPE(e)                (((e) >> DEVT_TYPE_START) & ((1 << DEVT_TYPE_BITS) - 1))

// DEVT event types
#define DEVT_DISCONNECT             0
#define DEVT_USB_RESET              1
#define DEVT_CONNECTION_DONE        2
#define DEVT_LINK_STATE_CHANGE      3
#define DEVT_REMOTE_WAKEUP          4
#define DEVT_HIBERNATE_REQUEST      5
#define DEVT_SUSPEND_ENTRY          6
#define DEVT_SOF                    7
#define DEVT_ERRATIC_ERROR          9
#define DEVT_COMMAND_COMPLETE       10
#define DEVT_EVENT_BUF_OVERFLOW     11
#define DEVT_VENDOR_TEST_LMP        12
#define DEVT_STOPPED_DISCONNECT     13
#define DEVT_L1_RESUME_DETECT       14
#define DEVT_LDM_RESPONSE           15

// for DEVT_LINK_STATE_CHANGE
#define DEVT_LINK_STATE_CHANGE_SS       (1 << 4)    // Set if link is super speed
#define DEVT_LINK_STATE_CHANGE_STATE(s) ((s) & 0xf) // Same as DSTS state