/* Copyright 2018 Canaan Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
#ifndef _DRIVER_SPI_H
#define _DRIVER_SPI_H

#include <stdint.h>
#include <stddef.h>
#include "dmac.h"

#ifdef __cplusplus
extern "C" {
#endif

/* clang-format off */
typedef struct _spi
{
    /* SPI Control Register 0                                    (0x00)*/
    volatile uint32_t ctrlr0;
    /* SPI Control Register 1                                    (0x04)*/
    volatile uint32_t ctrlr1;
    /* SPI Enable Register                                       (0x08)*/
    volatile uint32_t ssienr;
    /* SPI Microwire Control Register                            (0x0c)*/
    volatile uint32_t mwcr;
    /* SPI Slave Enable Register                                 (0x10)*/
    volatile uint32_t ser;
    /* SPI Baud Rate Select                                      (0x14)*/
    volatile uint32_t baudr;
    /* SPI Transmit FIFO Threshold Level                         (0x18)*/
    volatile uint32_t txftlr;
    /* SPI Receive FIFO Threshold Level                          (0x1c)*/
    volatile uint32_t rxftlr;
    /* SPI Transmit FIFO Level Register                          (0x20)*/
    volatile uint32_t txflr;
    /* SPI Receive FIFO Level Register                           (0x24)*/
    volatile uint32_t rxflr;
    /* SPI Status Register                                       (0x28)*/
    volatile uint32_t sr;
    /* SPI Interrupt Mask Register                               (0x2c)*/
    volatile uint32_t imr;
    /* SPI Interrupt Status Register                             (0x30)*/
    volatile uint32_t isr;
    /* SPI Raw Interrupt Status Register                         (0x34)*/
    volatile uint32_t risr;
    /* SPI Transmit FIFO Overflow Interrupt Clear Register       (0x38)*/
    volatile uint32_t txoicr;
    /* SPI Receive FIFO Overflow Interrupt Clear Register        (0x3c)*/
    volatile uint32_t rxoicr;
    /* SPI Receive FIFO Underflow Interrupt Clear Register       (0x40)*/
    volatile uint32_t rxuicr;
    /* SPI Multi-Master Interrupt Clear Register                 (0x44)*/
    volatile uint32_t msticr;
    /* SPI Interrupt Clear Register                              (0x48)*/
    volatile uint32_t icr;
    /* SPI DMA Control Register                                  (0x4c)*/
    volatile uint32_t dmacr;
    /* SPI DMA Transmit Data Level                               (0x50)*/
    volatile uint32_t dmatdlr;
    /* SPI DMA Receive Data Level                                (0x54)*/
    volatile uint32_t dmardlr;
    /* SPI Identification Register                               (0x58)*/
    volatile uint32_t idr;
    /* SPI DWC_ssi component version                             (0x5c)*/
    volatile uint32_t ssic_version_id;
    /* SPI Data Register 0-36                                    (0x60 -- 0xec)*/
    volatile uint32_t dr[36];
    /* SPI RX Sample Delay Register                              (0xf0)*/
    volatile uint32_t rx_sample_delay;
    /* SPI SPI Control Register                                  (0xf4)*/
    volatile uint32_t spi_ctrlr0;
    /* reserved                                                  (0xf8)*/
    volatile uint32_t resv;
    /* SPI XIP Mode bits                                         (0xfc)*/
    volatile uint32_t xip_mode_bits;
    /* SPI XIP INCR transfer opcode                              (0x100)*/
    volatile uint32_t xip_incr_inst;
    /* SPI XIP WRAP transfer opcode                              (0x104)*/
    volatile uint32_t xip_wrap_inst;
    /* SPI XIP Control Register                                  (0x108)*/
    volatile uint32_t xip_ctrl;
    /* SPI XIP Slave Enable Register                             (0x10c)*/
    volatile uint32_t xip_ser;
    /* SPI XIP Receive FIFO Overflow Interrupt Clear Register    (0x110)*/
    volatile uint32_t xrxoicr;
    /* SPI XIP time out register for continuous transfers        (0x114)*/
    volatile uint32_t xip_cnt_time_out;
    volatile uint32_t endian;
} __attribute__((packed, aligned(4))) spi_t;

typedef enum
{
    IDLE,
    COMMAND,
    TRANSFER,
} spi_slave_status_e;

/* clang-format on */

#ifdef __cplusplus
}
#endif

#endif /* _DRIVER_SPI_H */
