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 127