// SPDX-License-Identifier: GPL-2.0-or-later
/*******************************************************************************
*
* CTU CAN FD IP Core
*
* Copyright (C) 2015-2018 Ondrej Ille <ondrej.ille@gmail.com> FEE CTU
* Copyright (C) 2018-2021 Ondrej Ille <ondrej.ille@gmail.com> self-funded
* Copyright (C) 2018-2019 Martin Jerabek <martin.jerabek01@gmail.com> FEE CTU
* Copyright (C) 2018-2022 Pavel Pisa <pisa@cmp.felk.cvut.cz> FEE CTU/self-funded
*
* Project advisors:
* Jiri Novak <jnovak@fel.cvut.cz>
* Pavel Pisa <pisa@cmp.felk.cvut.cz>
*
* Department of Measurement (http://meas.fel.cvut.cz/)
* Faculty of Electrical Engineering (http://www.fel.cvut.cz)
* Czech Technical University (http://www.cvut.cz/)
******************************************************************************/
#include <linux/clk.h>
#include <linux/errno.h>
#include <linux/ethtool.h>
#include <linux/init.h>
#include <linux/bitfield.h>
#include <linux/interrupt.h>
#include <linux/io.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/skbuff.h>
#include <linux/string.h>
#include <linux/types.h>
#include <linux/can/error.h>
#include <linux/pm_runtime.h>
#include "ctucanfd.h"
#include "ctucanfd_kregs.h"
#include "ctucanfd_kframe.h"
#ifdef DEBUG
#define ctucan_netdev_dbg(ndev, args...) \
netdev_dbg(ndev, args)
#else
#define ctucan_netdev_dbg(...) do { } while (0)
#endif
#define CTUCANFD_ID 0xCAFD
/* TX buffer rotation:
* - when a buffer transitions to empty state, rotate order and priorities
* - if more buffers seem to transition at the same time, rotate by the number of buffers
* - it may be assumed that buffers transition to empty state in FIFO order (because we manage
* priorities that way)
* - at frame filling, do not rotate anything, just increment buffer modulo counter
*/
#define CTUCANFD_FLAG_RX_FFW_BUFFERED 1
#define CTUCAN_STATE_TO_TEXT_ENTRY(st) \
[st] = #st
enum ctucan_txtb_status {
TXT_NOT_EXIST = 0x0,
TXT_RDY = 0x1,
TXT_TRAN = 0x2,
TXT_ABTP = 0x3,
TXT_TOK 