1 /* 2 * QEMU model of the Xilinx ZynqMP CAN controller. 3 * 4 * Copyright (c) 2020 Xilinx Inc. 5 * 6 * Written-by: Vikram Garhwal<fnu.vikram@xilinx.com> 7 * 8 * Based on QEMU CAN Device emulation implemented by Jin Yang, Deniz Eren and 9 * Pavel Pisa. 10 * 11 * Permission is hereby granted, free of charge, to any person obtaining a copy 12 * of this software and associated documentation files (the "Software"), to deal 13 * in the Software without restriction, including without limitation the rights 14 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 15 * copies of the Software, and to permit persons to whom the Software is 16 * furnished to do so, subject to the following conditions: 17 * 18 * The above copyright notice and this permission notice shall be included in 19 * all copies or substantial portions of the Software. 20 * 21 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 22 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 23 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 24 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 25 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 26 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 27 * THE SOFTWARE. 28 */ 29 30 #ifndef XLNX_ZYNQMP_CAN_H 31 #define XLNX_ZYNQMP_CAN_H 32 33 #include "hw/sysbus.h" 34 #include "hw/register.h" 35 #include "net/can_emu.h" 36 #include "net/can_host.h" 37 #include "qemu/fifo32.h" 38 #include "hw/ptimer.h" 39 #include "hw/qdev-clock.h" 40 41 #define TYPE_XLNX_ZYNQMP_CAN "xlnx.zynqmp-can" 42 43 #define XLNX_ZYNQMP_CAN(obj) \ 44 OBJECT_CHECK(XlnxZynqMPCANState, (obj), TYPE_XLNX_ZYNQMP_CAN) 45 46 #define MAX_CAN_CTRLS 2 47 #define XLNX_ZYNQMP_CAN_R_MAX (0x84 / 4) 48 #define MAILBOX_CAPACITY 64 49 #define CAN_TIMER_MAX 0XFFFFUL 50 #define CAN_DEFAULT_CLOCK (24 * 1000 * 1000) 51 52 /* Each CAN_FRAME will have 4 * 32bit size. */ 53 #define CAN_FRAME_SIZE 4 54 #define RXFIFO_SIZE (MAILBOX_CAPACITY * CAN_FRAME_SIZE) 55 56 typedef struct XlnxZynqMPCANState { 57 SysBusDevice parent_obj; 58 MemoryRegion iomem; 59 60 qemu_irq irq; 61 62 CanBusClientState bus_client; 63 CanBusState *canbus; 64 65 struct { 66 uint32_t ext_clk_freq; 67 } cfg; 68 69 RegisterInfo reg_info[XLNX_ZYNQMP_CAN_R_MAX]; 70 uint32_t regs[XLNX_ZYNQMP_CAN_R_MAX]; 71 72 Fifo32 rx_fifo; 73 Fifo32 tx_fifo; 74 Fifo32 txhpb_fifo; 75 76 ptimer_state *can_timer; 77 } XlnxZynqMPCANState; 78 79 #endif 80