/* * QEMU model of the Xilinx ZynqMP CAN controller. * This implementation is based on the following datasheet: * https://www.xilinx.com/support/documentation/user_guides/ug1085-zynq-ultrascale-trm.pdf * * Copyright (c) 2020 Xilinx Inc. * * Written-by: Vikram Garhwal * * Based on QEMU CAN Device emulation implemented by Jin Yang, Deniz Eren and * Pavel Pisa * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ #include "qemu/osdep.h" #include "hw/sysbus.h" #include "hw/register.h" #include "hw/irq.h" #include "qapi/error.h" #include "qemu/bitops.h" #include "qemu/log.h" #include "qemu/cutils.h" #include "migration/vmstate.h" #include "hw/qdev-properties.h" #include "net/can_emu.h" #include "net/can_host.h" #include "qemu/event_notifier.h" #include "qom/object_interfaces.h" #include "hw/net/xlnx-zynqmp-can.h" #include "trace.h" #ifndef XLNX_ZYNQMP_CAN_ERR_DEBUG #define XLNX_ZYNQMP_CAN_ERR_DEBUG 0 #endif #define MAX_DLC 8 #undef ERROR REG32(SOFTWARE_RESET_REGISTER, 0x0) FIELD(SOFTWARE_RESET_REGISTER, CEN, 1, 1) FIELD(SOFTWARE_RESET_REGISTER, SRST, 0, 1) REG32(MODE_SELECT_REGISTER, 0x4) FIELD(MODE_SELECT_REGISTER, SNOOP, 2, 1) FIELD(MODE_SELECT_REGISTER, LBACK, 1, 1) FIELD(MODE_SELECT_REGISTER, SLEEP, 0, 1) REG32(ARBITRATION_PHASE_BAUD_RATE_PRESCALER_REGISTER, 0x8) FIELD(ARBITRATION_PHASE_BAUD_RATE_PRESCALER_REGISTER, BRP, 0, 8) REG32(ARBITRATION_PHASE_BIT_TIMING_REGISTER, 0xc) FIELD(ARBITRATION_PHASE_BIT_TIMING_REGISTER, SJW, 7, 2) FIELD(ARBITRATION_PHASE_BIT_TIMING_REGISTER, TS2, 4, 3) FIELD(ARBITRATION_PHASE_BIT_TIMING_REGISTER, TS1, 0, 4) REG32(ERROR_COUNTER_REGISTER, 0x10) FIELD(ERROR_COUNTER_REGISTER, REC, 8, 8) FIELD(ERROR_COUNTER_REGISTER, TEC, 0, 8) REG32(ERROR_STATUS_REGISTER, 0x14) FIELD(ERROR_STATUS_REGISTER, ACKER, 4, 1) FIELD(ERROR_STATUS_REGISTER, BERR, 3, 1) FIELD(ERROR_STATUS_REGISTER, STER, 2, 1) FIELD(ERROR_STATUS_REGISTER, FMER, 1, 1) FIELD(ERROR_STATUS_REGISTER, CRCER, 0, 1) REG32(STATUS_REGISTER, 0x18) FIELD(STATUS_REGISTER, SNOOP, 12, 1) FIELD(STATUS_REGISTER, ACFBSY, 11, 1) FIELD(STATUS_REGISTER, TXFLL, 10, 1) FIELD(STATUS_REGISTER, TXBFLL, 9, 1) FIELD(STATUS_REGISTER, ESTAT, 7, 2) FIELD(STATUS_REGISTER, ERRWRN, 6, 1) FIELD(STATUS_REGISTER, BBSY, 5, 1) FIELD(STATUS_REGISTER, BIDLE, 4, 1) FIELD(STATUS_REGISTER, NORMAL, 3, 1) FIELD(STATUS_REGISTER, SLEEP, 2, 1) FIELD(STATUS_REGISTER, LBACK, 1, 1) FIELD(STATUS_REGISTER, CONFIG, 0, 1) REG32(INTERRUPT_STATUS_REGISTER, 0x1c) FIELD(INTERRUPT_STATUS_REGISTER, TXFEMP, 14, 1) FIELD(INTERRUPT_STATUS_REGISTER, TXFWMEMP, 13, 1) FIELD(INTERRUPT_STATUS_REGISTER, RXFWMFLL, 12, 1) FIELD(INTERRUPT_STATUS_REGISTER, WKUP, 11, 1) FIELD(INTERRUPT_STATUS_REGISTER, SLP, 10, 1) FIELD(INTERRUPT_STATUS_REGISTER, BSOFF, 9, 1) FIELD(INTERRUPT_STATUS_REGISTER, ERROR, 8, 1) FIELD(INTERRUPT_STATUS_REGISTER, RXNEMP, 7, 1) FIELD(INTERRUPT_STATUS_REGISTER, RXOFLW, 6, 1) FIELD(INTERRUPT_STATUS_REGISTER, RXUFLW, 5, 1) FIELD(INTERRUPT_STATUS_REGISTER, RXOK, 4, 1) FIELD(INTERRUPT_STATUS_REGISTER, TXBFLL, 3, 1) FIELD(INTERRUPT_STATUS_REGISTER, TXFLL, 2, 1) FIELD(INTERRUPT_STATUS_REGISTER, TXOK, 1, 1) FIELD(INTERRUPT_STATUS_REGISTER, ARBLST, 0, 1) REG32(INTERRUPT_ENABLE_REGISTER, 0x20) FIELD(INTERRUPT_ENABLE_REGISTER, ETXFEMP, 14, 1) FIELD(INTERRUPT_ENABLE_REGISTER, ETXFWMEMP, 13, 1) FIELD(INTERRUPT_ENABLE_REGISTER, ERXFWMFLL, 12, 1) FIELD(INTERRUPT_ENABLE_REGISTER, EWKUP, 11, 1) FIELD(INTERRUPT_ENABLE_REGISTER, ESLP, 10, 1) FIELD(INTERRUPT_ENABLE_REGISTER, EBSOFF, 9, 1) FIELD(INTERRUPT_ENABLE_REGISTER, EERROR, 8, 1) FIELD(INTERRUPT_ENABLE_REGISTER, ERXNEMP, 7, 1) FIELD(INTERRUPT_ENABLE_REGISTER, ERXOFLW, 6, 1) FIELD(INTERRUPT_ENABLE_REGISTER, ERXUFLW, 5, 1) FIELD(INTERRUPT_ENABLE_REGISTER, ERXOK, 4, 1) FIELD(INTERRUPT_ENABLE_REGISTER, ETXBFLL, 3, 1) FIELD(INTERRUPT_ENABLE_REGISTER, ETXFLL, 2, 1) FIELD(INTERRUPT_ENABLE_REGISTER, ETXOK, 1, 1) FIELD(INTERRUPT_ENABLE_REGISTER, EARBLST, 0, 1) REG32(INTERRUPT_CLEAR_REGISTER, 0x24) FIELD(INTERRUPT_CLEAR_REGISTER, CTXFEMP, 14, 1) FIELD(INTERRUPT_CLEAR_REGISTER, CTXFWMEMP, 13, 1) FIELD(INTERRUPT_CLEAR_REGISTER, CRXFWMFLL, 12, 1) FIELD(INTERRUPT_CLEAR_REGISTER, CWKUP, 11, 1) FIELD(INTERRUPT_CLEAR_REGISTER, CSLP, 10, 1) FIELD(INTERRUPT_CLEAR_REGISTER, CBSOFF, 9, 1) FIELD(INTERRUPT_CLEAR_REGISTER, CERROR, 8, 1) FIELD(INTERRUPT_CLEAR_REGISTER, CRXNEMP, 7, 1) FIELD(INTERRUPT_CLEAR_REGISTER, CRXOFLW, 6, 1) FIELD(INTERRUPT_CLEAR_REGISTER, CRXUFLW, 5, 1) FIELD(INTERRUPT_CLEAR_REGISTER, CRXOK, 4, 1) FIELD(INTERRUPT_CLEAR_REGISTER, CTXBFLL, 3, 1) FIELD(INTERRUPT_CLEAR_REGISTER, CTXFLL, 2, 1) FIELD(INTERRUPT_CLEAR_REGISTER, CTXOK, 1, 1) FIELD(INTERRUPT_CLEAR_REGISTER, CARBLST, 0, 1) REG32(TIMESTAMP_REGISTER, 0x28) FIELD(TIMESTAMP_REGISTER, CTS, 0, 1) REG32(WIR, 0x2c) FIELD(WIR, EW, 8, 8) FIELD(WIR, FW, 0, 8) REG32(TXFIFO_ID, 0x30) FIELD(TXFIFO_ID, IDH, 21, 11) FIELD(TXFIFO_ID, SRRRTR, 20, 1) FIELD(TXFIFO_ID, IDE, 19, 1) FIELD(TXFIFO_ID, IDL, 1, 18) FIELD(TXFIFO_ID, RTR, 0, 1) REG32(TXFIFO_DLC, 0x34) FIELD(TXFIFO_DLC, DLC, 28, 4) REG32(TXFIFO_DATA1, 0x38) FIELD(TXFIFO_DATA1, DB0, 24, 8) FIELD(TXFIFO_DATA1, DB1, 16, 8) FIELD(TXFIFO_DATA1, DB2, 8, 8) FIELD(TXFIFO_DATA1, DB3, 0, 8) REG32(TXFIFO_DATA2, 0x3c) FIELD(TXFIFO_DATA2, DB4, 24, 8) FIELD(TXFIFO_DATA2, DB5, 16, 8) FIELD(TXFIFO_DATA2, DB6, 8, 8) FIELD(TXFIFO_DATA2, DB7, 0, 8) REG32(TXHPB_ID, 0x40) FIELD(TXHPB_ID, IDH, 21, 11) FIELD(TXHPB_ID, SRRRTR, 20, 1) FIELD(TXHPB_ID, IDE, 19, 1) FIELD(TXHPB_ID, IDL, 1, 18) FIELD(TXHPB_ID, RTR, 0, 1) REG32(TXHPB_DLC, 0x44) FIELD(TXHPB_DLC, DLC, 28, 4) REG32(TXHPB_DATA1, 0x48) FIELD(TXHPB_DATA1, DB0, 24, 8) FIELD(TXHPB_DATA1, DB1, 16, 8) FIELD(TXHPB_DATA1, DB2, 8, 8) FIELD(TXHPB_DATA1, DB3, 0, 8) REG32(TXHPB_DATA2, 0x4c) FIELD(TXHPB_DATA2, DB4, 24, 8) FIELD(TXHPB_DATA2, DB5, 16, 8) FIELD(TXHPB_DATA2, DB6, 8, 8) FIELD(TXHPB_DATA2, DB7, 0, 8) REG32(RXFIFO_ID, 0x50) FIELD(RXFIFO_ID, IDH, 21, 11) FIELD(RXFIFO_ID, SRRRTR, 20, 1) FIELD(RXFIFO_ID, IDE, 19, 1) FIELD(RXFIFO_ID, IDL, 1, 18) FIELD(RXFIFO_ID, RTR, 0, 1) REG32(RXFIFO_DLC, 0x54) FIELD(RXFIFO_DLC, DLC, 28, 4) FIELD(RXFIFO_DLC, RXT, 0, 16) REG32(RXFIFO_DATA1, 0x58) FIELD(RXFIFO_DATA1, DB0, 24, 8) FIELD(RXFIFO_DATA1, DB1, 16, 8) FIELD(RXFIFO_DATA1, DB2, 8, 8) FIELD(RXFIFO_DATA1, DB3, 0, 8) REG32(RXFIFO_DATA2, 0x5c) FIELD(RXFIFO_DATA2, DB4, 24, 8) FIELD(RXFIFO_DATA2, DB5, 16, 8) FIELD(RXFIFO_DATA2, DB6, 8, 8) FIELD(RXFIFO_DATA2, DB7, 0, 8) REG32(AFR, 0x60) FIELD(AFR, UAF4, 3, 1) FIELD(AFR, UAF3, 2, 1) FIELD(AFR, UAF2, 1, 1) FIELD(AFR, UAF1, 0, 1) REG32(AFMR1, 0x64) FIELD(AFMR1, AMIDH, 21, 11) FIELD(AFMR1, AMSRR, 20, 1) FIELD(AFMR1, AMIDE, 19, 1) FIELD(AFMR1, AMIDL, 1, 18) FIELD(AFMR1, AMRTR, 0, 1) REG32(AFIR1, 0x68) FIELD(AFIR1, AIIDH, 21, 11) FIELD(AFIR1, AISRR, 20, 1) FIELD(AFIR1, AIIDE, 19, 1) FIELD(AFIR1, AIIDL, 1, 18) FIELD(AFIR1, AIRTR, 0, 1) REG32(AFMR2, 0x6c) FIELD(AFMR2, AMIDH, 21, 11) FIELD(AFMR2, AMSRR, 20, 1) FIELD(AFMR2, AMIDE, 19, 1) FIELD(AFMR2, AMIDL, 1, 18) FIELD(AFMR2, AMRTR, 0, 1) REG32(AFIR2, 0x70) FIELD(AFIR2, AIIDH, 21, 11) FIELD(AFIR2, AISRR, 20, 1) FIELD(AFIR2, AIIDE, 19, 1) FIELD(AFIR2, AIIDL, 1, 18) FIELD(AFIR2, AIRTR, 0, 1) REG32(AFMR3, 0x74) FIELD(AFMR3, AMIDH, 21, 11) FIELD(AFMR3, AMSRR, 20, 1) FIELD(AFMR3, AMIDE, 19, 1) FIELD(AFMR3, AMIDL, 1, 18) FIELD(AFMR3, AMRTR, 0, 1) REG32(AFIR3, 0x78) FIELD(AFIR3, AIIDH, 21, 11) FIELD(AFIR3, AISRR, 20, 1) FIELD(AFIR3, AIIDE, 19, 1) FIELD(AFIR3, AIIDL, 1, 18) FIELD(AFIR3, AIRTR, 0, 1) REG32(AFMR4, 0x7c) FIELD(AFMR4, AMIDH, 21, 11) FIELD(AFMR4, AMSRR, 20, 1) FIELD(AFMR4, AMIDE, 19, 1) FIELD(AFMR4, AMIDL, 1, 18) FIELD(AFMR4, AMRTR, 0, 1) REG32(AFIR4, 0x80) FIELD(AFIR4, AIIDH, 21, 11) FIELD(AFIR4, AISRR, 20, 1) FIELD(AFIR4, AIIDE, 19, 1) FIELD(AFIR4, AIIDL, 1, 18) FIELD(AFIR4, AIRTR, 0, 1) static void can_update_irq(XlnxZynqMPCANState *s) { uint32_t irq; /* Watermark register interrupts. */ if ((fifo32_num_free(&s->tx_fifo) / CAN_FRAME_SIZE) > ARRAY_FIELD_EX32(s->regs, WIR, EW)) { ARRAY_FIELD_DP32(s->regs, INTERRUPT_STATUS_REGISTER, TXFWMEMP, 1); } if ((fifo32_num_used(&s->rx_fifo) / CAN_FRAME_SIZE) > ARRAY_FIELD_EX32(s->regs, WIR, FW)) { ARRAY_FIELD_DP32(s->regs, INTERRUPT_STATUS_REGISTER, RXFWMFLL, 1); } /* RX Interrupts. */ if (fifo32_num_used(&s->rx_fifo) >= CAN_FRAME_SIZE) { ARRAY_FIELD_DP32(s->regs, INTERRUPT_STATUS_REGISTER, RXNEMP, 1); } /* TX interrupts. */ if (fifo32_is_empty(&s->tx_fifo)) { ARRAY_FIELD_DP32(s->regs, INTERRUPT_STATUS_REGISTER, TXFEMP, 1); } if (fifo32_is_full(&s->tx_fifo)) { ARRAY_FIELD_DP32(s->regs, INTERRUPT_STATUS_REGISTER, TXFLL, 1); } if (fifo32_is_full(&s->txhpb_fifo)) { ARRAY_FIELD_DP32(s->regs, INTERRUPT_STATUS_REGISTER, TXBFLL, 1); } irq = s->regs[R_INTERRUPT_STATUS_REGISTER]; irq &= s->regs[R_INTERRUPT_ENABLE_REGISTER]; trace_xlnx_can_update_irq(s->regs[R_INTERRUPT_STATUS_REGISTER], s->regs[R_INTERRUPT_ENABLE_REGISTER], irq); qemu_set_irq(s->irq, irq); } static void can_ier_post_write(RegisterInfo *reg, uint64_t val) { XlnxZynqMPCANState *s = XLNX_ZYNQMP_CAN(reg->opaque); can_update_irq(s); } static uint64_t can_icr_pre_write(RegisterInfo *reg, uint64_t val) { XlnxZynqMPCANState *s = XLNX_ZYNQMP_CAN(reg->opaque); s->regs[R_INTERRUPT_STATUS_REGISTER] &= ~val; can_update_irq(s); return 0; } static void can_config_reset(XlnxZynqMPCANState *s) { /* Reset all the configuration registers. */ register_reset(&s->reg_info[R_SOFTWARE_RESET_REGISTER]); register_reset(&s->reg_info[R_MODE_SELECT_REGISTER]); register_reset( &s->reg_info[R_ARBITRATION_PHASE_BAUD_RATE_PRESCALER_REGISTER]); register_reset(&s->reg_info[R_ARBITRATION_PHASE_BIT_TIMING_REGISTER]); register_reset(&s->reg_info[R_STATUS_REGISTER]); register_reset(&s->reg_info[R_INTERRUPT_STATUS_REGISTER]); register_reset(&s->reg_info[R_INTERRUPT_ENABLE_REGISTER]); register_reset(&s->reg_info[R_INTERRUPT_CLEAR_REGISTER]); register_reset(&s->reg_info[R_WIR]); } static void can_config_mode(XlnxZynqMPCANState *s) { register_reset(&s->reg_info[R_ERROR_COUNTER_REGISTER]); register_reset(&s->reg_info[R_ERROR_STATUS_REGISTER]); /* Put XlnxZynqMPCAN in configuration mode. */ ARRAY_FIELD_DP32(s->regs, STATUS_REGISTER, CONFIG, 1); ARRAY_FIELD_DP32(s->regs, INTERRUPT_STATUS_REGISTER, WKUP, 0); ARRAY_FIELD_DP32(s->regs, INTERRUPT_STATUS_REGISTER, SLP, 0); ARRAY_FIELD_DP32(s->regs, INTERRUPT_STATUS_REGISTER, BSOFF, 0); ARRAY_FIELD_DP32(s->regs, INTERRUPT_STATUS_REGISTER, ERROR, 0); ARRAY_FIELD_DP32(s->regs, INTERRUPT_STATUS_REGISTER, RXOFLW, 0); ARRAY_FIELD_DP32(s->regs, INTERRUPT_STATUS_REGISTER, RXOK, 0); ARRAY_FIELD_DP32(s->regs, INTERRUPT_STATUS_REGISTER, TXOK, 0); ARRAY_FIELD_DP32(s->regs, INTERRUPT_STATUS_REGISTER, ARBLST, 0); can_update_irq(s); } static void update_status_register_mode_bits(XlnxZynqMPCANState *s) { bool sleep_status = ARRAY_FIELD_EX32(s->regs, STATUS_REGISTER, SLEEP); bool sleep_mode = ARRAY_FIELD_EX32(s->regs, MODE_SELECT_REGISTER, SLEEP); /* Wake up interrupt bit. */ bool wakeup_irq_val = sleep_status && (sleep_mode == 0); /* Sleep interrupt bit. */ bool sleep_irq_val = sleep_mode && (sleep_status == 0); /* Clear previous core mode status bits. */ ARRAY_FIELD_DP32(s->regs, STATUS_REGISTER, LBACK, 0); ARRAY_FIELD_DP32(s->regs, STATUS_REGISTER, SLEEP, 0); ARRAY_FIELD_DP32(s->regs, STATUS_REGISTER, SNOOP, 0); ARRAY_FIELD_DP32(s->regs, STATUS_REGISTER, NORMAL, 0); /* set current mode bit and generate irqs accordingly. */ if (ARRAY_FIELD_EX32(s->regs, MODE_SELECT_REGISTER, LBACK)) { ARRAY_FIELD_DP32(s->regs, STATUS_REGISTER, LBACK, 1); } else if (ARRAY_FIELD_EX32(s->regs, MODE_SELECT_REGISTER, SLEEP)) { ARRAY_FIELD_DP32(s->regs, STATUS_REGISTER, SLEEP, 1); ARRAY_FIELD_DP32(s->regs, INTERRUPT_STATUS_REGISTER, SLP, sleep_irq_val); } else if (ARRAY_FIELD_EX32(s->regs, MODE_SELECT_REGISTER, SNOOP)) { ARRAY_FIELD_DP32(s->regs, STATUS_REGISTER, SNOOP, 1); } else { /* * If all bits are zero then XlnxZynqMPCAN is set in normal mode. */ ARRAY_FIELD_DP32(s->regs, STATUS_REGISTER, NORMAL, 1); /* Set wakeup interrupt bit. */ ARRAY_FIELD_DP32(s->regs, INTERRUPT_STATUS_REGISTER, WKUP, wakeup_irq_val); } can_update_irq(s); } static void can_exit_sleep_mode(XlnxZynqMPCANState *s) { ARRAY_FIELD_DP32(s->regs, MODE_SELECT_REGISTER, SLEEP, 0); update_status_register_mode_bits(s); } static void generate_frame(qemu_can_frame *frame, uint32_t *data) { frame->can_id = data[0]; frame->can_dlc = FIELD_EX32(data[1], TXFIFO_DLC, DLC); frame->data[0] = FIELD_EX32(data[2], TXFIFO_DATA1, DB3); frame->data[1] = FIELD_EX32(data[2], TXFIFO_DATA1, DB2); frame->data[2] = FIELD_EX32(data[2], TXFIFO_DATA1, DB1); frame->data[3] = FIELD_EX32(data[2], TXFIFO_DATA1, DB0); frame->data[4] = FIELD_EX32(data[3], TXFIFO_DATA2, DB7); frame->data[5] = FIELD_EX32(data[3], TXFIFO_DATA2, DB6); frame->data[6] = FIELD_EX32(data[3], TXFIFO_DATA2, DB5); frame->data[7] = FIELD_EX32(data[3], TXFIFO_DATA2, DB4); } static bool tx_ready_check(XlnxZynqMPCANState *s) { if (ARRAY_FIELD_EX32(s->regs, SOFTWARE_RESET_REGISTER, SRST)) { g_autofree char *path = object_get_canonical_path(OBJECT(s)); qemu_log_mask(LOG_GUEST_ERROR, "%s: Attempting to transfer data while" " data while controller is in reset mode.\n", path); return false; } if (ARRAY_FIELD_EX32(s->regs, SOFTWARE_RESET_REGISTER, CEN) == 0) { g_autofree char *path = object_get_canonical_path(OBJECT(s)); qemu_log_mask(LOG_GUEST_ERROR, "%s: Attempting to transfer" " data while controller is in configuration mode. Reset" " the core so operations can start fresh.\n", path); return false; } if (ARRAY_FIELD_EX32(s->regs, STATUS_REGISTER, SNOOP)) { g_autofree char *path = object_get_canonical_path(OBJECT(s)); qemu_log_mask(LOG_GUEST_ERROR, "%s: Attempting to transfer" " data while controller is in SNOOP MODE.\n", path); return false; } return true; } static void read_tx_frame(XlnxZynqMPCANState *s, Fifo32 *fifo, uint32_t *data) { unsigned used = fifo32_num_used(fifo); bool is_txhpb = fifo == &s->txhpb_fifo; assert(used > 0); used %= CAN_FRAME_SIZE; /* * Frame Message Format * * Each frame includes four words (16 bytes). Software must read and write * all four words regardless of the actual number of data bytes and valid * fields in the message. * If software misbehave (not writing all four words), we use the previous * registers content to initialize each missing word. * * If used is 1 then ID, DLC and DATA1 are missing. * if used is 2 then ID and DLC are missing. * if used is 3 then only ID is missing. */ if (used > 0) { data[0] = s->regs[is_txhpb ? R_TXHPB_ID : R_TXFIFO_ID]; } else { data[0] = fifo32_pop(fifo); } if (used == 1 || used == 2) { data[1] = s->regs[is_txhpb ? R_TXHPB_DLC : R_TXFIFO_DLC]; } else { data[1] = fifo32_pop(fifo); } if (used == 1) { data[2] = s->regs[is_txhpb ? R_TXHPB_DATA1 : R_TXFIFO_DATA1]; } else { data[2] = fifo32_pop(fifo); } /* DATA2 triggered the transfer thus is always available */ data[3] = fifo32_pop(fifo); if (used) { qemu_log_mask(LOG_GUEST_ERROR, "%s: Incomplete CAN frame (only %u/%u slots used)\n", TYPE_XLNX_ZYNQMP_CAN, used, CAN_FRAME_SIZE); } } static void transfer_fifo(XlnxZynqMPCANState *s, Fifo32 *fifo) { qemu_can_frame frame; uint32_t data[CAN_FRAME_SIZE]; int i; bool can_tx = tx_ready_check(s); if (!can_tx) { g_autofree char *path = object_get_canonical_path(OBJECT(s)); qemu_log_mask(LOG_GUEST_ERROR, "%s: Controller is not enabled for data" " transfer.\n", path); can_update_irq(s); return; } while (!fifo32_is_empty(fifo)) { read_tx_frame(s, fifo, data); if (ARRAY_FIELD_EX32(s->regs, STATUS_REGISTER, LBACK)) { /* * Controller is in loopback. In Loopback mode, the CAN core * transmits a recessive bitstream on to the XlnxZynqMPCAN Bus. * Any message transmitted is looped back to the RX line and * acknowledged. The XlnxZynqMPCAN core receives any message * that it transmits. */ if (fifo32_is_full(&s->rx_fifo)) { ARRAY_FIELD_DP32(s->regs, INTERRUPT_STATUS_REGISTER, RXOFLW, 1); } else { for (i = 0; i < CAN_FRAME_SIZE; i++) { fifo32_push(&s->rx_fifo, data[i]); } ARRAY_FIELD_DP32(s->regs, INTERRUPT_STATUS_REGISTER, RXOK, 1); } } else { /* Normal mode Tx. */ generate_frame(&frame, data); trace_xlnx_can_tx_data(frame.can_id, frame.can_dlc, frame.data[0], frame.data[1], frame.data[2], frame.data[3], frame.data[4], frame.data[5], frame.data[6], frame.data[7]); can_bus_client_send(&s->bus_client, &frame, 1); } } ARRAY_FIELD_DP32(s->regs, INTERRUPT_STATUS_REGISTER, TXOK, 1); ARRAY_FIELD_DP32(s->regs, STATUS_REGISTER, TXBFLL, 0); if (ARRAY_FIELD_EX32(s->regs, STATUS_REGISTER, SLEEP)) { can_exit_sleep_mode(s); } can_update_irq(s); } static uint64_t can_srr_pre_write(RegisterInfo *reg, uint64_t val) { XlnxZynqMPCANState *s = XLNX_ZYNQMP_CAN(reg->opaque); ARRAY_FIELD_DP32(s->regs, SOFTWARE_RESET_REGISTER, CEN, FIELD_EX32(val, SOFTWARE_RESET_REGISTER, CEN)); if (FIELD_EX32(val, SOFTWARE_RESET_REGISTER, SRST)) { trace_xlnx_can_reset(val); /* First, core will do software reset then will enter in config mode. */ can_config_reset(s); } if (ARRAY_FIELD_EX32(s->regs, SOFTWARE_RESET_REGISTER, CEN) == 0) { can_config_mode(s); } else { /* * Leave config mode. Now XlnxZynqMPCAN core will enter normal, * sleep, snoop or loopback mode depending upon LBACK, SLEEP, SNOOP * register states. */ ARRAY_FIELD_DP32(s->regs, STATUS_REGISTER, CONFIG, 0); ptimer_transaction_begin(s->can_timer); ptimer_set_count(s->can_timer, 0); ptimer_transaction_commit(s->can_timer); /* XlnxZynqMPCAN is out of config mode. It will send pending data. */ transfer_fifo(s, &s->txhpb_fifo); transfer_fifo(s, &s->tx_fifo); } update_status_register_mode_bits(s); return s->regs[R_SOFTWARE_RESET_REGISTER]; } static uint64_t can_msr_pre_write(RegisterInfo *reg, uint64_t val) { XlnxZynqMPCANState *s = XLNX_ZYNQMP_CAN(reg->opaque); uint8_t multi_mode; /* * Multiple mode set check. This is done to make sure user doesn't set * multiple modes. */ multi_mode = FIELD_EX32(val, MODE_SELECT_REGISTER, LBACK) + FIELD_EX32(val, MODE_SELECT_REGISTER, SLEEP) + FIELD_EX32(val, MODE_SELECT_REGISTER, SNOOP); if (multi_mode > 1) { g_autofree char *path = object_get_canonical_path(OBJECT(s)); qemu_log_mask(LOG_GUEST_ERROR, "%s: Attempting to config" " several modes simultaneously. One mode will be selected" " according to their priority: LBACK > SLEEP > SNOOP.\n", path); } if (ARRAY_FIELD_EX32(s->regs, SOFTWARE_RESET_REGISTER, CEN) == 0) { /* We are in configuration mode, any mode can be selected. */ s->regs[R_MODE_SELECT_REGISTER] = val; } else { bool sleep_mode_bit = FIELD_EX32(val, MODE_SELECT_REGISTER, SLEEP); ARRAY_FIELD_DP32(s->regs, MODE_SELECT_REGISTER, SLEEP, sleep_mode_bit); if (FIELD_EX32(val, MODE_SELECT_REGISTER, LBACK)) { g_autofree char *path = object_get_canonical_path(OBJECT(s)); qemu_log_mask(LOG_GUEST_ERROR, "%s: Attempting to set" " LBACK mode without setting CEN bit as 0.\n", path); } else if (FIELD_EX32(val, MODE_SELECT_REGISTER, SNOOP)) { g_autofree char *path = object_get_canonical_path(OBJECT(s)); qemu_log_mask(LOG_GUEST_ERROR, "%s: Attempting to set" " SNOOP mode without setting CEN bit as 0.\n", path); } update_status_register_mode_bits(s); } return s->regs[R_MODE_SELECT_REGISTER]; } static uint64_t can_brpr_pre_write(RegisterInfo *reg, uint64_t val) { XlnxZynqMPCANState *s = XLNX_ZYNQMP_CAN(reg->opaque); /* Only allow writes when in config mode. */ if (ARRAY_FIELD_EX32(s->regs, SOFTWARE_RESET_REGISTER, CEN)) { return s->regs[R_ARBITRATION_PHASE_BAUD_RATE_PRESCALER_REGISTER]; } return val; } static uint64_t can_btr_pre_write(RegisterInfo *reg, uint64_t val) { XlnxZynqMPCANState *s = XLNX_ZYNQMP_CAN(reg->opaque); /* Only allow writes when in config mode. */ if (ARRAY_FIELD_EX32(s->regs, SOFTWARE_RESET_REGISTER, CEN)) { return s->regs[R_ARBITRATION_PHASE_BIT_TIMING_REGISTER]; } return val; } static uint64_t can_tcr_pre_write(RegisterInfo *reg, uint64_t val) { XlnxZynqMPCANState *s = XLNX_ZYNQMP_CAN(reg->opaque); if (FIELD_EX32(val, TIMESTAMP_REGISTER, CTS)) { ptimer_transaction_begin(s->can_timer); ptimer_set_count(s->can_timer, 0); ptimer_transaction_commit(s->can_timer); } return 0; } static void update_rx_fifo(XlnxZynqMPCANState *s, const qemu_can_frame *frame) { bool filter_pass = false; uint16_t timestamp = 0; /* If no filter is enabled. Message will be stored in FIFO. */ if (!((ARRAY_FIELD_EX32(s->regs, AFR, UAF1)) | (ARRAY_FIELD_EX32(s->regs, AFR, UAF2)) | (ARRAY_FIELD_EX32(s->regs, AFR, UAF3)) | (ARRAY_FIELD_EX32(s->regs, AFR, UAF4)))) { filter_pass = true; } /* * Messages that pass any of the acceptance filters will be stored in * the RX FIFO. */ if (ARRAY_FIELD_EX32(s->regs, AFR, UAF1)) { uint32_t id_masked = s->regs[R_AFMR1] & frame->can_id; uint32_t filter_id_masked = s->regs[R_AFMR1] & s->regs[R_AFIR1]; if (filter_id_masked == id_masked) { filter_pass = true; } } if (ARRAY_FIELD_EX32(s->regs, AFR, UAF2)) { uint32_t id_masked = s->regs[R_AFMR2] & frame->can_id; uint32_t filter_id_masked = s->regs[R_AFMR2] & s->regs[R_AFIR2]; if (filter_id_masked == id_masked) { filter_pass = true; } } if (ARRAY_FIELD_EX32(s->regs, AFR, UAF3)) { uint32_t id_masked = s->regs[R_AFMR3] & frame->can_id; uint32_t filter_id_masked = s->regs[R_AFMR3] & s->regs[R_AFIR3]; if (filter_id_masked == id_masked) { filter_pass = true; } } if (ARRAY_FIELD_EX32(s->regs, AFR, UAF4)) { uint32_t id_masked = s->regs[R_AFMR4] & frame->can_id; uint32_t filter_id_masked = s->regs[R_AFMR4] & s->regs[R_AFIR4]; if (filter_id_masked == id_masked) { filter_pass = true; } } if (!filter_pass) { trace_xlnx_can_rx_fifo_filter_reject(frame->can_id, frame->can_dlc); return; } /* Store the message in fifo if it passed through any of the filters. */ if (filter_pass && frame->can_dlc <= MAX_DLC) { if (fifo32_is_full(&s->rx_fifo)) { ARRAY_FIELD_DP32(s->regs, INTERRUPT_STATUS_REGISTER, RXOFLW, 1); } else { timestamp = CAN_TIMER_MAX - ptimer_get_count(s->can_timer); fifo32_push(&s->rx_fifo, frame->can_id); fifo32_push(&s->rx_fifo, deposit32(0, R_RXFIFO_DLC_DLC_SHIFT, R_RXFIFO_DLC_DLC_LENGTH, frame->can_dlc) | deposit32(0, R_RXFIFO_DLC_RXT_SHIFT, R_RXFIFO_DLC_RXT_LENGTH, timestamp)); /* First 32 bit of the data. */ fifo32_push(&s->rx_fifo, deposit32(0, R_RXFIFO_DATA1_DB3_SHIFT, R_RXFIFO_DATA1_DB3_LENGTH, frame->data[0]) | deposit32(0, R_RXFIFO_DATA1_DB2_SHIFT, R_RXFIFO_DATA1_DB2_LENGTH, frame->data[1]) | deposit32(0, R_RXFIFO_DATA1_DB1_SHIFT, R_RXFIFO_DATA1_DB1_LENGTH, frame->data[2]) | deposit32(0, R_RXFIFO_DATA1_DB0_SHIFT, R_RXFIFO_DATA1_DB0_LENGTH, frame->data[3])); /* Last 32 bit of the data. */ fifo32_push(&s->rx_fifo, deposit32(0, R_RXFIFO_DATA2_DB7_SHIFT, R_RXFIFO_DATA2_DB7_LENGTH, frame->data[4]) | deposit32(0, R_RXFIFO_DATA2_DB6_SHIFT, R_RXFIFO_DATA2_DB6_LENGTH, frame->data[5]) | deposit32(0, R_RXFIFO_DATA2_DB5_SHIFT, R_RXFIFO_DATA2_DB5_LENGTH, frame->data[6]) | deposit32(0, R_RXFIFO_DATA2_DB4_SHIFT, R_RXFIFO_DATA2_DB4_LENGTH, frame->data[7])); ARRAY_FIELD_DP32(s->regs, INTERRUPT_STATUS_REGISTER, RXOK, 1); trace_xlnx_can_rx_data(frame->can_id, frame->can_dlc, frame->data[0], frame->data[1], frame->data[2], frame->data[3], frame->data[4], frame->data[5], frame->data[6], frame->data[7]); } can_update_irq(s); } } static uint64_t can_rxfifo_post_read_id(RegisterInfo *reg, uint64_t val) { XlnxZynqMPCANState *s = XLNX_ZYNQMP_CAN(reg->opaque); unsigned used = fifo32_num_used(&s->rx_fifo); if (used < CAN_FRAME_SIZE) { ARRAY_FIELD_DP32(s->regs, INTERRUPT_STATUS_REGISTER, RXUFLW, 1); } else { val = s->regs[R_RXFIFO_ID] = fifo32_pop(&s->rx_fifo); s->regs[R_RXFIFO_DLC] = fifo32_pop(&s->rx_fifo); s->regs[R_RXFIFO_DATA1] = fifo32_pop(&s->rx_fifo); s->regs[R_RXFIFO_DATA2] = fifo32_pop(&s->rx_fifo); } can_update_irq(s); return val; } static void can_filter_enable_post_write(RegisterInfo *reg, uint64_t val) { XlnxZynqMPCANState *s = XLNX_ZYNQMP_CAN(reg->opaque); if (ARRAY_FIELD_EX32(s->regs, AFR, UAF1) && ARRAY_FIELD_EX32(s->regs, AFR, UAF2) && ARRAY_FIELD_EX32(s->regs, AFR, UAF3) && ARRAY_FIELD_EX32(s->regs, AFR, UAF4)) { ARRAY_FIELD_DP32(s->regs, STATUS_REGISTER, ACFBSY, 1); } else { ARRAY_FIELD_DP32(s->regs, STATUS_REGISTER, ACFBSY, 0); } } static uint64_t can_filter_mask_pre_write(RegisterInfo *reg, uint64_t val) { XlnxZynqMPCANState *s = XLNX_ZYNQMP_CAN(reg->opaque); uint32_t reg_idx = (reg->access->addr) / 4; uint32_t filter_number = (reg_idx - R_AFMR1) / 2; /* modify an acceptance filter, the corresponding UAF bit should be '0'. */ if (!(s->regs[R_AFR] & (1 << filter_number))) { s->regs[reg_idx] = val; trace_xlnx_can_filter_mask_pre_write(filter_number, s->regs[reg_idx]); } else { g_autofree char *path = object_get_canonical_path(OBJECT(s)); qemu_log_mask(LOG_GUEST_ERROR, "%s: Acceptance filter %d" " mask is not set as corresponding UAF bit is not 0.\n", path, filter_number + 1); } return s->regs[reg_idx]; } static uint64_t can_filter_id_pre_write(RegisterInfo *reg, uint64_t val) { XlnxZynqMPCANState *s = XLNX_ZYNQMP_CAN(reg->opaque); uint32_t reg_idx = (reg->access->addr) / 4; uint32_t filter_number = (reg_idx - R_AFIR1) / 2; if (!(s->regs[R_AFR] & (1 << filter_number))) { s->regs[reg_idx] = val; trace_xlnx_can_filter_id_pre_write(filter_number, s->regs[reg_idx]); } else { g_autofree char *path = object_get_canonical_path(OBJECT(s)); qemu_log_mask(LOG_GUEST_ERROR, "%s: Acceptance filter %d" " id is not set as corresponding UAF bit is not 0.\n", path, filter_number + 1); } return s->regs[reg_idx]; } static void can_tx_post_write(RegisterInfo *reg, uint64_t val) { XlnxZynqMPCANState *s = XLNX_ZYNQMP_CAN(reg->opaque); bool is_txhpb = reg->access->addr > A_TXFIFO_DATA2; bool initiate_transfer = (reg->access->addr == A_TXFIFO_DATA2) || (reg->access->addr == A_TXHPB_DATA2); Fifo32 *f = is_txhpb ? &s->txhpb_fifo : &s->tx_fifo; if (!fifo32_is_full(f)) { fifo32_push(f, val); } else { g_autofree char *path = object_get_canonical_path(OBJECT(s)); qemu_log_mask(LOG_GUEST_ERROR, "%s: TX FIFO is full.\n", path); } /* Initiate the message send if TX register is written. */ if (initiate_transfer && ARRAY_FIELD_EX32(s->regs, SOFTWARE_RESET_REGISTER, CEN)) { transfer_fifo(s, f); } can_update_irq(s); } static const RegisterAccessInfo can_regs_info[] = { { .name = "SOFTWARE_RESET_REGISTER", .addr = A_SOFTWARE_RESET_REGISTER, .rsvd = 0xfffffffc, .pre_write = can_srr_pre_write, },{ .name = "MODE_SELECT_REGISTER", .addr = A_MODE_SELECT_REGISTER, .rsvd = 0xfffffff8, .pre_write = can_msr_pre_write, },{ .name = "ARBITRATION_PHASE_BAUD_RATE_PRESCALER_REGISTER", .addr = A_ARBITRATION_PHASE_BAUD_RATE_PRESCALER_REGISTER, .rsvd = 0xffffff00, .pre_write = can_brpr_pre_write, },{ .name = "ARBITRATION_PHASE_BIT_TIMING_REGISTER", .addr = A_ARBITRATION_PHASE_BIT_TIMING_REGISTER, .rsvd = 0xfffffe00, .pre_write = can_btr_pre_write, },{ .name = "ERROR_COUNTER_REGISTER", .addr = A_ERROR_COUNTER_REGISTER, .rsvd = 0xffff0000, .ro = 0xffffffff, },{ .name = "ERROR_STATUS_REGISTER", .addr = A_ERROR_STATUS_REGISTER, .rsvd = 0xffffffe0, .w1c = 0x1f, },{ .name = "STATUS_REGISTER", .addr = A_STATUS_REGISTER, .reset = 0x1, .rsvd = 0xffffe000, .ro = 0x1fff, },{ .name = "INTERRUPT_STATUS_REGISTER", .addr = A_INTERRUPT_STATUS_REGISTER, .reset = 0x6000, .rsvd = 0xffff8000, .ro = 0x7fff, },{ .name = "INTERRUPT_ENABLE_REGISTER", .addr = A_INTERRUPT_ENABLE_REGISTER, .rsvd = 0xffff8000, .post_write = can_ier_post_write, },{ .name = "INTERRUPT_CLEAR_REGISTER", .addr = A_INTERRUPT_CLEAR_REGISTER, .rsvd = 0xffff8000, .pre_write = can_icr_pre_write, },{ .name = "TIMESTAMP_REGISTER", .addr = A_TIMESTAMP_REGISTER, .rsvd = 0xfffffffe, .pre_write = can_tcr_pre_write, },{ .name = "WIR", .addr = A_WIR, .reset = 0x3f3f, .rsvd = 0xffff0000, },{ .name = "TXFIFO_ID", .addr = A_TXFIFO_ID, .post_write = can_tx_post_write, },{ .name = "TXFIFO_DLC", .addr = A_TXFIFO_DLC, .rsvd = 0xfffffff, .post_write = can_tx_post_write, },{ .name = "TXFIFO_DATA1", .addr = A_TXFIFO_DATA1, .post_write = can_tx_post_write, },{ .name = "TXFIFO_DATA2", .addr = A_TXFIFO_DATA2, .post_write = can_tx_post_write, },{ .name = "TXHPB_ID", .addr = A_TXHPB_ID, .post_write = can_tx_post_write, },{ .name = "TXHPB_DLC", .addr = A_TXHPB_DLC, .rsvd = 0xfffffff, .post_write = can_tx_post_write, },{ .name = "TXHPB_DATA1", .addr = A_TXHPB_DATA1, .post_write = can_tx_post_write, },{ .name = "TXHPB_DATA2", .addr = A_TXHPB_DATA2, .post_write = can_tx_post_write, },{ .name = "RXFIFO_ID", .addr = A_RXFIFO_ID, .ro = 0xffffffff, .post_read = can_rxfifo_post_read_id, },{ .name = "RXFIFO_DLC", .addr = A_RXFIFO_DLC, .rsvd = 0xfff0000, },{ .name = "RXFIFO_DATA1", .addr = A_RXFIFO_DATA1, },{ .name = "RXFIFO_DATA2", .addr = A_RXFIFO_DATA2, },{ .name = "AFR", .addr = A_AFR, .rsvd = 0xfffffff0, .post_write = can_filter_enable_post_write, },{ .name = "AFMR1", .addr = A_AFMR1, .pre_write = can_filter_mask_pre_write, },{ .name = "AFIR1", .addr = A_AFIR1, .pre_write = can_filter_id_pre_write, },{ .name = "AFMR2", .addr = A_AFMR2, .pre_write = can_filter_mask_pre_write, },{ .name = "AFIR2", .addr = A_AFIR2, .pre_write = can_filter_id_pre_write, },{ .name = "AFMR3", .addr = A_AFMR3, .pre_write = can_filter_mask_pre_write, },{ .name = "AFIR3", .addr = A_AFIR3, .pre_write = can_filter_id_pre_write, },{ .name = "AFMR4", .addr = A_AFMR4, .pre_write = can_filter_mask_pre_write, },{ .name = "AFIR4", .addr = A_AFIR4, .pre_write = can_filter_id_pre_write, } }; static void xlnx_zynqmp_can_ptimer_cb(void *opaque) { /* No action required on the timer rollover. */ } static const MemoryRegionOps can_ops = { .read = register_read_memory, .write = register_write_memory, .endianness = DEVICE_LITTLE_ENDIAN, .valid = { .min_access_size = 4, .max_access_size = 4, }, }; static void xlnx_zynqmp_can_reset_init(Object *obj, ResetType type) { XlnxZynqMPCANState *s = XLNX_ZYNQMP_CAN(obj); unsigned int i; for (i = R_RXFIFO_ID; i < ARRAY_SIZE(s->reg_info); ++i) { register_reset(&s->reg_info[i]); } ptimer_transaction_begin(s->can_timer); ptimer_set_count(s->can_timer, 0); ptimer_transaction_commit(s->can_timer); } static void xlnx_zynqmp_can_reset_hold(Object *obj) { XlnxZynqMPCANState *s = XLNX_ZYNQMP_CAN(obj); unsigned int i; for (i = 0; i < R_RXFIFO_ID; ++i) { register_reset(&s->reg_info[i]); } /* * Reset FIFOs when CAN model is reset. This will clear the fifo writes * done by post_write which gets called from register_reset function, * post_write handle will not be able to trigger tx because CAN will be * disabled when software_reset_register is cleared first. */ fifo32_reset(&s->rx_fifo); fifo32_reset(&s->tx_fifo); fifo32_reset(&s->txhpb_fifo); } static bool xlnx_zynqmp_can_can_receive(CanBusClientState *client) { XlnxZynqMPCANState *s = container_of(client, XlnxZynqMPCANState, bus_client); if (ARRAY_FIELD_EX32(s->regs, SOFTWARE_RESET_REGISTER, SRST)) { g_autofree char *path = object_get_canonical_path(OBJECT(s)); qemu_log_mask(LOG_GUEST_ERROR, "%s: Controller is in reset state.\n", path); return false; } if ((ARRAY_FIELD_EX32(s->regs, SOFTWARE_RESET_REGISTER, CEN)) == 0) { g_autofree char *path = object_get_canonical_path(OBJECT(s)); qemu_log_mask(LOG_GUEST_ERROR, "%s: Controller is disabled. Incoming" " messages will be discarded.\n", path); return false; } return true; } static ssize_t xlnx_zynqmp_can_receive(CanBusClientState *client, const qemu_can_frame *buf, size_t buf_size) { XlnxZynqMPCANState *s = container_of(client, XlnxZynqMPCANState, bus_client); const qemu_can_frame *frame = buf; if (buf_size <= 0) { g_autofree char *path = object_get_canonical_path(OBJECT(s)); qemu_log_mask(LOG_GUEST_ERROR, "%s: Error in the data received.\n", path); return 0; } if (ARRAY_FIELD_EX32(s->regs, STATUS_REGISTER, SNOOP)) { /* Snoop Mode: Just keep the data. no response back. */ update_rx_fifo(s, frame); } else if ((ARRAY_FIELD_EX32(s->regs, STATUS_REGISTER, SLEEP))) { /* * XlnxZynqMPCAN is in sleep mode. Any data on bus will bring it to wake * up state. */ can_exit_sleep_mode(s); update_rx_fifo(s, frame); } else if ((ARRAY_FIELD_EX32(s->regs, STATUS_REGISTER, SLEEP)) == 0) { update_rx_fifo(s, frame); } else { /* * XlnxZynqMPCAN will not participate in normal bus communication * and will not receive any messages transmitted by other CAN nodes. */ trace_xlnx_can_rx_discard(s->regs[R_STATUS_REGISTER]); } return 1; } static CanBusClientInfo can_xilinx_bus_client_info = { .can_receive = xlnx_zynqmp_can_can_receive, .receive = xlnx_zynqmp_can_receive, }; static int xlnx_zynqmp_can_connect_to_bus(XlnxZynqMPCANState *s, CanBusState *bus) { s->bus_client.info = &can_xilinx_bus_client_info; if (can_bus_insert_client(bus, &s->bus_client) < 0) { return -1; } return 0; } static void xlnx_zynqmp_can_realize(DeviceState *dev, Error **errp) { XlnxZynqMPCANState *s = XLNX_ZYNQMP_CAN(dev); if (s->canbus) { if (xlnx_zynqmp_can_connect_to_bus(s, s->canbus) < 0) { g_autofree char *path = object_get_canonical_path(OBJECT(s)); error_setg(errp, "%s: xlnx_zynqmp_can_connect_to_bus" " failed.", path); return; } } /* Create RX FIFO, TXFIFO, TXHPB storage. */ fifo32_create(&s->rx_fifo, RXFIFO_SIZE); fifo32_create(&s->tx_fifo, RXFIFO_SIZE); fifo32_create(&s->txhpb_fifo, CAN_FRAME_SIZE); /* Allocate a new timer. */ s->can_timer = ptimer_init(xlnx_zynqmp_can_ptimer_cb, s, PTIMER_POLICY_LEGACY); ptimer_transaction_begin(s->can_timer); ptimer_set_freq(s->can_timer, s->cfg.ext_clk_freq); ptimer_set_limit(s->can_timer, CAN_TIMER_MAX, 1); ptimer_run(s->can_timer, 0); ptimer_transaction_commit(s->can_timer); } static void xlnx_zynqmp_can_init(Object *obj) { XlnxZynqMPCANState *s = XLNX_ZYNQMP_CAN(obj); SysBusDevice *sbd = SYS_BUS_DEVICE(obj); RegisterInfoArray *reg_array; memory_region_init(&s->iomem, obj, TYPE_XLNX_ZYNQMP_CAN, XLNX_ZYNQMP_CAN_R_MAX * 4); reg_array = register_init_block32(DEVICE(obj), can_regs_info, ARRAY_SIZE(can_regs_info), s->reg_info, s->regs, &can_ops, XLNX_ZYNQMP_CAN_ERR_DEBUG, XLNX_ZYNQMP_CAN_R_MAX * 4); memory_region_add_subregion(&s->iomem, 0x00, ®_array->mem); sysbus_init_mmio(sbd, &s->iomem); sysbus_init_irq(SYS_BUS_DEVICE(obj), &s->irq); } static const VMStateDescription vmstate_can = { .name = TYPE_XLNX_ZYNQMP_CAN, .version_id = 1, .minimum_version_id = 1, .fields = (VMStateField[]) { VMSTATE_FIFO32(rx_fifo, XlnxZynqMPCANState), VMSTATE_FIFO32(tx_fifo, XlnxZynqMPCANState), VMSTATE_FIFO32(txhpb_fifo, XlnxZynqMPCANState), VMSTATE_UINT32_ARRAY(regs, XlnxZynqMPCANState, XLNX_ZYNQMP_CAN_R_MAX), VMSTATE_PTIMER(can_timer, XlnxZynqMPCANState), VMSTATE_END_OF_LIST(), } }; static Property xlnx_zynqmp_can_properties[] = { DEFINE_PROP_UINT32("ext_clk_freq", XlnxZynqMPCANState, cfg.ext_clk_freq, CAN_DEFAULT_CLOCK), DEFINE_PROP_LINK("canbus", XlnxZynqMPCANState, canbus, TYPE_CAN_BUS, CanBusState *), DEFINE_PROP_END_OF_LIST(), }; static void xlnx_zynqmp_can_class_init(ObjectClass *klass, void *data) { DeviceClass *dc = DEVICE_CLASS(klass); ResettableClass *rc = RESETTABLE_CLASS(klass); rc->phases.enter = xlnx_zynqmp_can_reset_init; rc->phases.hold = xlnx_zynqmp_can_reset_hold; dc->realize = xlnx_zynqmp_can_realize; device_class_set_props(dc, xlnx_zynqmp_can_properties); dc->vmsd = &vmstate_can; } static const TypeInfo can_info = { .name = TYPE_XLNX_ZYNQMP_CAN, .parent = TYPE_SYS_BUS_DEVICE, .instance_size = sizeof(XlnxZynqMPCANState), .class_init = xlnx_zynqmp_can_class_init, .instance_init = xlnx_zynqmp_can_init, }; static void can_register_types(void) { type_register_static(&can_info); } type_init(can_register_types)