| 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/core/sysbus.h" |
| 34 | #include "hw/core/register.h" |
| 35 | #include "net/can_emu.h" |
| 36 | #include "net/can_host.h" |
| 37 | #include "qemu/fifo32.h" |
| 38 | #include "hw/core/ptimer.h" |
| 39 | #include "hw/core/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 |