/*      $NetBSD: sunxi_can.h,v 1.1 2018/03/07 20:55:31 bouyer Exp $     */

/*-
 * Copyright (c) 2017,2018 The NetBSD Foundation, Inc.
 * All rights reserved.
 *
 * This code is derived from software contributed to The NetBSD Foundation
 * by Manuel Bouyer.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

/* CAN mode select register */
#define SUNXI_CAN_MODSEL_REG            0x00
#define SUNXI_CAN_MODSEL_SLEEP          __BIT(4)
#define SUNXI_CAN_MODSEL_ACP_FLT_MOD    __BIT(3)
#define SUNXI_CAN_MODSEL_LB_MOD         __BIT(2)
#define SUNXI_CAN_MODSEL_LST_ONLY       __BIT(1)
#define SUNXI_CAN_MODSEL_RST            __BIT(0)

/* CAN command register */
#define SUNXI_CAN_CMD_REG       0x04
#define SUNXI_CAN_CMD_BUS_OFF           __BIT(5)
#define SUNXI_CAN_CMD_SELF_REQ          __BIT(4)
#define SUNXI_CAN_CMD_CLR_OR            __BIT(3)
#define SUNXI_CAN_CMD_REL_RX_BUF                __BIT(2)
#define SUNXI_CAN_CMD_ABT_REQ           __BIT(1)
#define SUNXI_CAN_CMD_TANS_REQ          __BIT(0)

/* CAN status register */
#define SUNXI_CAN_STA_REG       0x08
#define SUNXI_CAN_STA_ERR_CODE          __BITS(23,22)
#define SUNXI_CAN_STA_ERR_CODE_BIT              0
#define SUNXI_CAN_STA_ERR_CODE_FORM             1
#define SUNXI_CAN_STA_ERR_CODE_STUFF            2
#define SUNXI_CAN_STA_ERR_CODE_OTHER            3
#define SUNXI_CAN_STA_ERR_DIR           _BIT(21)
#define SUNXI_CAN_STA_ERR_SEG_CODE      __BITS(20,16)
#define SUNXI_CAN_STA_ARB_LOST          __BITS(12,8)
#define SUNXI_CAN_STA_BUS               __BIT(7)
#define SUNXI_CAN_STA_ERR               __BIT(6)
#define SUNXI_CAN_STA_TX                __BIT(5)
#define SUNXI_CAN_STA_RX                __BIT(4)
#define SUNXI_CAN_STA_TX_OVER           __BIT(3)
#define SUNXI_CAN_STA_TX_RDY            __BIT(2)
#define SUNXI_CAN_STA_DATA_OR           __BIT(1)
#define SUNXI_CAN_STA_RX_RDY            __BIT(0)

/* CAN interrupt register */
#define SUNXI_CAN_INT_REG       0x0c
#define SUNXI_CAN_INT_BERR              __BIT(7)
#define SUNXI_CAN_INT_ARB_LOST          __BIT(6)
#define SUNXI_CAN_INT_ERR_PASSIVE       __BIT(5)
#define SUNXI_CAN_INT_WAKEUP            __BIT(4)
#define SUNXI_CAN_INT_DATA_OR           __BIT(3)
#define SUNXI_CAN_INT_ERR               __BIT(2)
#define SUNXI_CAN_INT_TX_FLAG           __BIT(1)
#define SUNXI_CAN_INT_RX_FLAG           __BIT(0)

/* CAN interrupt enable register */
#define SUNXI_CAN_INTE_REG      0x10

/* CAN bus timing register */
#define SUNXI_CAN_BUS_TIME_REG  0x14
#define SUNXI_CAN_BUS_TIME_SAM          __BIT(23)
#define SUNXI_CAN_BUS_TIME_PHSEG2       __BITS(22,20)
#define SUNXI_CAN_BUS_TIME_PHSEG1       __BITS(19,16)
#define SUNXI_CAN_BUS_TIME_SJW          __BITS(15,14)
#define SUNXI_CAN_BUS_TIME_TQ_BRP       __BITS(9,0)

/* CAN tx error warning limit register */
#define SUNXI_CAN_EWL_REG       0x18
#define SUNXI_CAN_EWL_ERR_WRN_LMT       __BITS(7,0)

/* CAN error counter register */
#define SUNXI_CAN_REC_REG       0x1c
#define SUNXI_CAN_REC_RX_ERR_CNT                __BITS(23,16)
#define SUNXI_CAN_REC_TX_ERR_CNT                __BITS(7,0)

/* CAN receive message register */
#define SUNXI_CAN_RMSGC_REG     0x20
#define SUNXI_CAN_RMSGC_RX_MSG_CNT      __BITS(7,0)

/* CAN receive buffer start address register */
#define SUNXI_CAN_RSADDR_REG    0x24
#define SUNXI_CAN_RSADDR_RX_BUF_SADDR   __BITS(5,0)

/* CAN rx/tx message buffer 0 register */
#define SUNXI_CAN_TXBUF0_REG    0x40
#define SUNXI_CAN_TXBUF0_EFF            __BIT(7)
#define SUNXI_CAN_TXBUF0_RTR            __BIT(6)
#define SUNXI_CAN_TXBUF0_DL             __BITS(3,0)

/* CAN rx/tx message buffer registers */
#define SUNXI_CAN_TXBUF1_REG    0x44
#define SUNXI_CAN_TXBUF2_REG    0x48
#define SUNXI_CAN_TXBUF3_REG    0x4c
#define SUNXI_CAN_TXBUF4_REG    0x50
#define SUNXI_CAN_TXBUF5_REG    0x54
#define SUNXI_CAN_TXBUF6_REG    0x58
#define SUNXI_CAN_TXBUF7_REG    0x5c
#define SUNXI_CAN_TXBUF8_REG    0x60
#define SUNXI_CAN_TXBUF9_REG    0x64
#define SUNXI_CAN_TXBUF10_REG   0x68
#define SUNXI_CAN_TXBUF11_REG   0x6c
#define SUNXI_CAN_TXBUF12_REG   0x70

/* CAN acceptance code 0 register */
#define SUNXI_CAN_ACPC          0x40

/* CAN acceptance mask 0 register */
#define SUNXI_CAN_ACPM          0x44

/* CAN transmit buffer for read back registers */
#define SUNXI_CAN_RBUF_RBACK0   0x180
#define SUNXI_CAN_RBUF_RBACK1   0x184
#define SUNXI_CAN_RBUF_RBACK2   0x188
#define SUNXI_CAN_RBUF_RBACK3   0x18c
#define SUNXI_CAN_RBUF_RBACK4   0x190
#define SUNXI_CAN_RBUF_RBACK5   0x194
#define SUNXI_CAN_RBUF_RBACK6   0x198
#define SUNXI_CAN_RBUF_RBACK7   0x19c
#define SUNXI_CAN_RBUF_RBACK8   0x1a0
#define SUNXI_CAN_RBUF_RBACK9   0x1a4
#define SUNXI_CAN_RBUF_RBACK10  0x1a8
#define SUNXI_CAN_RBUF_RBACK11  0x1ac
#define SUNXI_CAN_RBUF_RBACK12  0x1b0