hw/net/can/ctucan_core.h

   1 /*
   2  * CTU CAN FD device emulation
   3  * http://canbus.pages.fel.cvut.cz/
   4  *
   5  * Copyright (c) 2019 Jan Charvat (jancharvat.charvat@gmail.com)
   6  *
   7  * Based on Kvaser PCI CAN device (SJA1000 based) emulation implemented by
   8  * Jin Yang and Pavel Pisa
   9  *
  10  * Permission is hereby granted, free of charge, to any person obtaining a copy
  11  * of this software and associated documentation files (the "Software"), to deal
  12  * in the Software without restriction, including without limitation the rights
  13  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  14  * copies of the Software, and to permit persons to whom the Software is
  15  * furnished to do so, subject to the following conditions:
  16  *
  17  * The above copyright notice and this permission notice shall be included in
  18  * all copies or substantial portions of the Software.
  19  *
  20  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  21  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  22  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  23  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  24  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  25  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  26  * THE SOFTWARE.
  27  */
  28 #ifndef HW_CAN_CTUCAN_CORE_H
  29 #define HW_CAN_CTUCAN_CORE_H
  30
  31 #include "exec/hwaddr.h"
  32 #include "net/can_emu.h"
  33
  34 #if !HOST_BIG_ENDIAN
  35 #define __LITTLE_ENDIAN_BITFIELD 1
  36 #endif
  37
  38 #include "ctu_can_fd_frame.h"
  39 #include "ctu_can_fd_regs.h"
  40
  41 #define CTUCAN_CORE_MEM_SIZE       0x500
  42
  43 /* The max size for a message in FIFO */
  44 #define CTUCAN_MSG_MAX_LEN        (CTU_CAN_FD_DATA_1_4_W + 64)
  45 /* The receive buffer size. */
  46 #define CTUCAN_RCV_BUF_LEN        (1024 * 8)
  47
  48
  49 /* The max size for a message buffer */
  50 #define CTUCAN_CORE_MSG_MAX_LEN       0x50
  51 /* The receive buffer size. */
  52 #define CTUCAN_CORE_RCV_BUF_LEN       0x1000
  53
  54 #define CTUCAN_CORE_TXBUF_NUM            4
  55
  56 typedef struct CtuCanCoreMsgBuffer {
  57     uint8_t data[CTUCAN_CORE_MSG_MAX_LEN];
  58 } CtuCanCoreMsgBuffer;
  59
  60 typedef struct CtuCanCoreState {
  61     union ctu_can_fd_mode_settings                  mode_settings;
  62     union ctu_can_fd_status                         status;
  63     union ctu_can_fd_int_stat                       int_stat;
  64     union ctu_can_fd_int_ena_set                    int_ena;
  65     union ctu_can_fd_int_mask_set                   int_mask;
  66     union ctu_can_fd_btr                            brt;
  67     union ctu_can_fd_btr_fd                         brt_fd;
  68     union ctu_can_fd_ewl_erp_fault_state            ewl_erp_fault_state;
  69     union ctu_can_fd_rec_tec                        rec_tec;
  70     union ctu_can_fd_err_norm_err_fd                err_norm_err_fd;
  71     union ctu_can_fd_ctr_pres                       ctr_pres;
  72     union ctu_can_fd_filter_a_mask                  filter_a_mask;
  73     union ctu_can_fd_filter_a_val                   filter_a_val;
  74     union ctu_can_fd_filter_b_mask                  filter_b_mask;
  75     union ctu_can_fd_filter_b_val                   filter_b_val;
  76     union ctu_can_fd_filter_c_mask                  filter_c_mask;
  77     union ctu_can_fd_filter_c_val                   filter_c_val;
  78     union ctu_can_fd_filter_ran_low                 filter_ran_low;
  79     union ctu_can_fd_filter_ran_high                filter_ran_high;
  80     union ctu_can_fd_filter_control_filter_status   filter_control_filter_status;
  81     union ctu_can_fd_rx_mem_info                    rx_mem_info;
  82     union ctu_can_fd_rx_pointers                    rx_pointers;
  83     union ctu_can_fd_rx_status_rx_settings          rx_status_rx_settings;
  84     union ctu_can_fd_tx_status                      tx_status;
  85     union ctu_can_fd_tx_priority                    tx_priority;
  86     union ctu_can_fd_err_capt_alc                   err_capt_alc;
  87     union ctu_can_fd_trv_delay_ssp_cfg              trv_delay_ssp_cfg;
  88     union ctu_can_fd_rx_fr_ctr                      rx_fr_ctr;
  89     union ctu_can_fd_tx_fr_ctr                      tx_fr_ctr;
  90     union ctu_can_fd_debug_register                 debug_register;
  91     union ctu_can_fd_yolo_reg                       yolo_reg;
  92     union ctu_can_fd_timestamp_low                  timestamp_low;
  93     union ctu_can_fd_timestamp_high                 timestamp_high;
  94
  95     CtuCanCoreMsgBuffer tx_buffer[CTUCAN_CORE_TXBUF_NUM];
  96
  97     uint8_t         rx_buff[CTUCAN_RCV_BUF_LEN];  /* 32~95 .. 64bytes Rx FIFO */
  98     uint32_t        rx_tail_pos;        /* Count by bytes. */
  99     uint32_t        rx_cnt;        /* Count by bytes. */
 100     uint32_t        rx_frame_rem;
 101
 102     qemu_irq        irq;
 103     CanBusClientState bus_client;
 104 } CtuCanCoreState;
 105
 106 void ctucan_hardware_reset(CtuCanCoreState *s);
 107
 108 void ctucan_mem_write(CtuCanCoreState *s, hwaddr addr, uint64_t val,
 109                        unsigned size);
 110
 111 uint64_t ctucan_mem_read(CtuCanCoreState *s, hwaddr addr, unsigned size);
 112
 113 int ctucan_connect_to_bus(CtuCanCoreState *s, CanBusState *bus);
 114
 115 void ctucan_disconnect(CtuCanCoreState *s);
 116
 117 int ctucan_init(CtuCanCoreState *s, qemu_irq irq);
 118
 119 bool ctucan_can_receive(CanBusClientState *client);
 120
 121 ssize_t ctucan_receive(CanBusClientState *client,
 122                         const qemu_can_frame *frames, size_t frames_cnt);
 123
 124 extern const VMStateDescription vmstate_ctucan;
 125
 126 #endif