/* * QEMU model of the Ibex SPI Controller * SPEC Reference: https://docs.opentitan.org/hw/ip/spi_host/doc/ * * Copyright (C) 2022 Western Digital * * 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 "qemu/log.h" #include "qemu/module.h" #include "hw/registerfields.h" #include "hw/ssi/ibex_spi_host.h" #include "hw/irq.h" #include "hw/qdev-properties.h" #include "hw/qdev-properties-system.h" #include "migration/vmstate.h" #include "trace.h" REG32(INTR_STATE, 0x00) FIELD(INTR_STATE, ERROR, 0, 1) FIELD(INTR_STATE, SPI_EVENT, 1, 1) REG32(INTR_ENABLE, 0x04) FIELD(INTR_ENABLE, ERROR, 0, 1) FIELD(INTR_ENABLE, SPI_EVENT, 1, 1) REG32(INTR_TEST, 0x08) FIELD(INTR_TEST, ERROR, 0, 1) FIELD(INTR_TEST, SPI_EVENT, 1, 1) REG32(ALERT_TEST, 0x0c) FIELD(ALERT_TEST, FETAL_TEST, 0, 1) REG32(CONTROL, 0x10) FIELD(CONTROL, RX_WATERMARK, 0, 8) FIELD(CONTROL, TX_WATERMARK, 1, 8) FIELD(CONTROL, OUTPUT_EN, 29, 1) FIELD(CONTROL, SW_RST, 30, 1) FIELD(CONTROL, SPIEN, 31, 1) REG32(STATUS, 0x14) FIELD(STATUS, TXQD, 0, 8) FIELD(STATUS, RXQD, 18, 8) FIELD(STATUS, CMDQD, 16, 3) FIELD(STATUS, RXWM, 20, 1) FIELD(STATUS, BYTEORDER, 22, 1) FIELD(STATUS, RXSTALL, 23, 1) FIELD(STATUS, RXEMPTY, 24, 1) FIELD(STATUS, RXFULL, 25, 1) FIELD(STATUS, TXWM, 26, 1) FIELD(STATUS, TXSTALL, 27, 1) FIELD(STATUS, TXEMPTY, 28, 1) FIELD(STATUS, TXFULL, 29, 1) FIELD(STATUS, ACTIVE, 30, 1) FIELD(STATUS, READY, 31, 1) REG32(CONFIGOPTS, 0x18) FIELD(CONFIGOPTS, CLKDIV_0, 0, 16) FIELD(CONFIGOPTS, CSNIDLE_0, 16, 4) FIELD(CONFIGOPTS, CSNTRAIL_0, 20, 4) FIELD(CONFIGOPTS, CSNLEAD_0, 24, 4) FIELD(CONFIGOPTS, FULLCYC_0, 29, 1) FIELD(CONFIGOPTS, CPHA_0, 30, 1) FIELD(CONFIGOPTS, CPOL_0, 31, 1) REG32(CSID, 0x1c) FIELD(CSID, CSID, 0, 32) REG32(COMMAND, 0x20) FIELD(COMMAND, LEN, 0, 8) FIELD(COMMAND, CSAAT, 9, 1) FIELD(COMMAND, SPEED, 10, 2) FIELD(COMMAND, DIRECTION, 12, 2) REG32(ERROR_ENABLE, 0x2c) FIELD(ERROR_ENABLE, CMDBUSY, 0, 1) FIELD(ERROR_ENABLE, OVERFLOW, 1, 1) FIELD(ERROR_ENABLE, UNDERFLOW, 2, 1) FIELD(ERROR_ENABLE, CMDINVAL, 3, 1) FIELD(ERROR_ENABLE, CSIDINVAL, 4, 1) REG32(ERROR_STATUS, 0x30) FIELD(ERROR_STATUS, CMDBUSY, 0, 1) FIELD(ERROR_STATUS, OVERFLOW, 1, 1) FIELD(ERROR_STATUS, UNDERFLOW, 2, 1) FIELD(ERROR_STATUS, CMDINVAL, 3, 1) FIELD(ERROR_STATUS, CSIDINVAL, 4, 1) FIELD(ERROR_STATUS, ACCESSINVAL, 5, 1) REG32(EVENT_ENABLE, 0x34) FIELD(EVENT_ENABLE, RXFULL, 0, 1) FIELD(EVENT_ENABLE, TXEMPTY, 1, 1) FIELD(EVENT_ENABLE, RXWM, 2, 1) FIELD(EVENT_ENABLE, TXWM, 3, 1) FIELD(EVENT_ENABLE, READY, 4, 1) FIELD(EVENT_ENABLE, IDLE, 5, 1) static inline uint8_t div4_round_up(uint8_t dividend) { return (dividend + 3) / 4; } static void ibex_spi_rxfifo_reset(IbexSPIHostState *s) { uint32_t data = s->regs[IBEX_SPI_HOST_STATUS]; /* Empty the RX FIFO and assert RXEMPTY */ fifo8_reset(&s->rx_fifo); data = FIELD_DP32(data, STATUS, RXFULL, 0); data = FIELD_DP32(data, STATUS, RXEMPTY, 1); s->regs[IBEX_SPI_HOST_STATUS] = data; } static void ibex_spi_txfifo_reset(IbexSPIHostState *s) { uint32_t data = s->regs[IBEX_SPI_HOST_STATUS]; /* Empty the TX FIFO and assert TXEMPTY */ fifo8_reset(&s->tx_fifo); data = FIELD_DP32(data, STATUS, TXFULL, 0); data = FIELD_DP32(data, STATUS, TXEMPTY, 1); s->regs[IBEX_SPI_HOST_STATUS] = data; } static void ibex_spi_host_reset(DeviceState *dev) { IbexSPIHostState *s = IBEX_SPI_HOST(dev); trace_ibex_spi_host_reset("Resetting Ibex SPI"); /* SPI Host Register Reset */ s->regs[IBEX_SPI_HOST_INTR_STATE] = 0x00; s->regs[IBEX_SPI_HOST_INTR_ENABLE] = 0x00; s->regs[IBEX_SPI_HOST_INTR_TEST] = 0x00; s->regs[IBEX_SPI_HOST_ALERT_TEST] = 0x00; s->regs[IBEX_SPI_HOST_CONTROL] = 0x7f; s->regs[IBEX_SPI_HOST_STATUS] = 0x00; s->regs[IBEX_SPI_HOST_CONFIGOPTS] = 0x00; s->regs[IBEX_SPI_HOST_CSID] = 0x00; s->regs[IBEX_SPI_HOST_COMMAND] = 0x00; /* RX/TX Modelled by FIFO */ s->regs[IBEX_SPI_HOST_RXDATA] = 0x00; s->regs[IBEX_SPI_HOST_TXDATA] = 0x00; s->regs[IBEX_SPI_HOST_ERROR_ENABLE] = 0x1F; s->regs[IBEX_SPI_HOST_ERROR_STATUS] = 0x00; s->regs[IBEX_SPI_HOST_EVENT_ENABLE] = 0x00; ibex_spi_rxfifo_reset(s); ibex_spi_txfifo_reset(s); s->init_status = true; return; } /* * Check if we need to trigger an interrupt. * The two interrupts lines (host_err and event) can * be enabled separately in 'IBEX_SPI_HOST_INTR_ENABLE'. * * Interrupts are triggered based on the ones * enabled in the `IBEX_SPI_HOST_EVENT_ENABLE` and `IBEX_SPI_HOST_ERROR_ENABLE`. */ static void ibex_spi_host_irq(IbexSPIHostState *s) { uint32_t intr_test_reg = s->regs[IBEX_SPI_HOST_INTR_TEST]; uint32_t intr_en_reg = s->regs[IBEX_SPI_HOST_INTR_ENABLE]; uint32_t intr_state_reg = s->regs[IBEX_SPI_HOST_INTR_STATE]; uint32_t err_en_reg = s->regs[IBEX_SPI_HOST_ERROR_ENABLE]; uint32_t event_en_reg = s->regs[IBEX_SPI_HOST_EVENT_ENABLE]; uint32_t err_status_reg = s->regs[IBEX_SPI_HOST_ERROR_STATUS]; uint32_t status_reg = s->regs[IBEX_SPI_HOST_STATUS]; bool error_en = FIELD_EX32(intr_en_reg, INTR_ENABLE, ERROR); bool event_en = FIELD_EX32(intr_en_reg, INTR_ENABLE, SPI_EVENT); bool err_pending = FIELD_EX32(intr_state_reg, INTR_STATE, ERROR); bool status_pending = FIELD_EX32(intr_state_reg, INTR_STATE, SPI_EVENT); int err_irq = 0, event_irq = 0; /* Error IRQ enabled and Error IRQ Cleared */ if (error_en && !err_pending) { /* Event enabled, Interrupt Test Error */ if (FIELD_EX32(intr_test_reg, INTR_TEST, ERROR)) { err_irq = 1; } else if (FIELD_EX32(err_en_reg, ERROR_ENABLE, CMDBUSY) && FIELD_EX32(err_status_reg, ERROR_STATUS, CMDBUSY)) { /* Wrote to COMMAND when not READY */ err_irq = 1; } else if (FIELD_EX32(err_en_reg, ERROR_ENABLE, CMDINVAL) && FIELD_EX32(err_status_reg, ERROR_STATUS, CMDINVAL)) { /* Invalid command segment */ err_irq = 1; } else if (FIELD_EX32(err_en_reg, ERROR_ENABLE, CSIDINVAL) && FIELD_EX32(err_status_reg, ERROR_STATUS, CSIDINVAL)) { /* Invalid value for CSID */ err_irq = 1; } if (err_irq) { s->regs[IBEX_SPI_HOST_INTR_STATE] |= R_INTR_STATE_ERROR_MASK; } } qemu_set_irq(s->host_err, err_irq); /* Event IRQ Enabled and Event IRQ Cleared */ if (event_en && !status_pending) { if (FIELD_EX32(intr_test_reg, INTR_STATE, SPI_EVENT)) { /* Event enabled, Interrupt Test Event */ event_irq = 1; } else if (FIELD_EX32(event_en_reg, EVENT_ENABLE, READY) && FIELD_EX32(status_reg, STATUS, READY)) { /* SPI Host ready for next command */ event_irq = 1; } else if (FIELD_EX32(event_en_reg, EVENT_ENABLE, TXEMPTY) && FIELD_EX32(status_reg, STATUS, TXEMPTY)) { /* SPI TXEMPTY, TXFIFO drained */ event_irq = 1; } else if (FIELD_EX32(event_en_reg, EVENT_ENABLE, RXFULL) && FIELD_EX32(status_reg, STATUS, RXFULL)) { /* SPI RXFULL, RXFIFO full */ event_irq = 1; } if (event_irq) { s->regs[IBEX_SPI_HOST_INTR_STATE] |= R_INTR_STATE_SPI_EVENT_MASK; } } qemu_set_irq(s->event, event_irq); } static void ibex_spi_host_transfer(IbexSPIHostState *s) { uint32_t rx, tx, data; /* Get num of one byte transfers */ uint8_t segment_len = FIELD_EX32(s->regs[IBEX_SPI_HOST_COMMAND], COMMAND, LEN); while (segment_len > 0) { if (fifo8_is_empty(&s->tx_fifo)) { /* Assert Stall */ s->regs[IBEX_SPI_HOST_STATUS] |= R_STATUS_TXSTALL_MASK; break; } else if (fifo8_is_full(&s->rx_fifo)) { /* Assert Stall */ s->regs[IBEX_SPI_HOST_STATUS] |= R_STATUS_RXSTALL_MASK; break; } else { tx = fifo8_pop(&s->tx_fifo); } rx = ssi_transfer(s->ssi, tx); trace_ibex_spi_host_transfer(tx, rx); if (!fifo8_is_full(&s->rx_fifo)) { fifo8_push(&s->rx_fifo, rx); } else { /* Assert RXFULL */ s->regs[IBEX_SPI_HOST_STATUS] |= R_STATUS_RXFULL_MASK; } --segment_len; } data = s->regs[IBEX_SPI_HOST_STATUS]; /* Assert Ready */ data = FIELD_DP32(data, STATUS, READY, 1); /* Set RXQD */ data = FIELD_DP32(data, STATUS, RXQD, div4_round_up(segment_len)); /* Set TXQD */ data = FIELD_DP32(data, STATUS, TXQD, fifo8_num_used(&s->tx_fifo) / 4); /* Clear TXFULL */ data = FIELD_DP32(data, STATUS, TXFULL, 0); /* Reset RXEMPTY */ data = FIELD_DP32(data, STATUS, RXEMPTY, 0); /* Update register status */ s->regs[IBEX_SPI_HOST_STATUS] = data; /* Drop remaining bytes that exceed segment_len */ ibex_spi_txfifo_reset(s); ibex_spi_host_irq(s); } static uint64_t ibex_spi_host_read(void *opaque, hwaddr addr, unsigned int size) { IbexSPIHostState *s = opaque; uint32_t rc = 0; uint8_t rx_byte = 0; trace_ibex_spi_host_read(addr, size); /* Match reg index */ addr = addr >> 2; switch (addr) { /* Skipping any W/O registers */ case IBEX_SPI_HOST_INTR_STATE...IBEX_SPI_HOST_INTR_ENABLE: case IBEX_SPI_HOST_CONTROL...IBEX_SPI_HOST_STATUS: rc = s->regs[addr]; break; case IBEX_SPI_HOST_CSID: rc = s->regs[addr]; break; case IBEX_SPI_HOST_CONFIGOPTS: rc = s->config_opts[s->regs[IBEX_SPI_HOST_CSID]]; break; case IBEX_SPI_HOST_TXDATA: rc = s->regs[addr]; break; case IBEX_SPI_HOST_RXDATA: /* Clear RXFULL */ s->regs[IBEX_SPI_HOST_STATUS] &= ~R_STATUS_RXFULL_MASK; for (int i = 0; i < 4; ++i) { if (fifo8_is_empty(&s->rx_fifo)) { /* Assert RXEMPTY, no IRQ */ s->regs[IBEX_SPI_HOST_STATUS] |= R_STATUS_RXEMPTY_MASK; s->regs[IBEX_SPI_HOST_ERROR_STATUS] |= R_ERROR_STATUS_UNDERFLOW_MASK; return rc; } rx_byte = fifo8_pop(&s->rx_fifo); rc |= rx_byte << (i * 8); } break; case IBEX_SPI_HOST_ERROR_ENABLE...IBEX_SPI_HOST_EVENT_ENABLE: rc = s->regs[addr]; break; default: qemu_log_mask(LOG_GUEST_ERROR, "Bad offset 0x%" HWADDR_PRIx "\n", addr << 2); } return rc; } static void ibex_spi_host_write(void *opaque, hwaddr addr, uint64_t val64, unsigned int size) { IbexSPIHostState *s = opaque; uint32_t val32 = val64; uint32_t shift_mask = 0xff, status = 0, data = 0; uint8_t txqd_len; trace_ibex_spi_host_write(addr, size, val64); /* Match reg index */ addr = addr >> 2; switch (addr) { /* Skipping any R/O registers */ case IBEX_SPI_HOST_INTR_STATE: /* rw1c status register */ if (FIELD_EX32(val32, INTR_STATE, ERROR)) { data = FIELD_DP32(data, INTR_STATE, ERROR, 0); } if (FIELD_EX32(val32, INTR_STATE, SPI_EVENT)) { data = FIELD_DP32(data, INTR_STATE, SPI_EVENT, 0); } s->regs[addr] = data; break; case IBEX_SPI_HOST_INTR_ENABLE: s->regs[addr] = val32; break; case IBEX_SPI_HOST_INTR_TEST: s->regs[addr] = val32; ibex_spi_host_irq(s); break; case IBEX_SPI_HOST_ALERT_TEST: s->regs[addr] = val32; qemu_log_mask(LOG_UNIMP, "%s: SPI_ALERT_TEST is not supported\n", __func__); break; case IBEX_SPI_HOST_CONTROL: s->regs[addr] = val32; if (val32 & R_CONTROL_SW_RST_MASK) { ibex_spi_host_reset((DeviceState *)s); /* Clear active if any */ s->regs[IBEX_SPI_HOST_STATUS] &= ~R_STATUS_ACTIVE_MASK; } if (val32 & R_CONTROL_OUTPUT_EN_MASK) { qemu_log_mask(LOG_UNIMP, "%s: CONTROL_OUTPUT_EN is not supported\n", __func__); } break; case IBEX_SPI_HOST_CONFIGOPTS: /* Update the respective config-opts register based on CSIDth index */ s->config_opts[s->regs[IBEX_SPI_HOST_CSID]] = val32; qemu_log_mask(LOG_UNIMP, "%s: CONFIGOPTS Hardware settings not supported\n", __func__); break; case IBEX_SPI_HOST_CSID: if (val32 >= s->num_cs) { /* CSID exceeds max num_cs */ s->regs[IBEX_SPI_HOST_ERROR_STATUS] |= R_ERROR_STATUS_CSIDINVAL_MASK; ibex_spi_host_irq(s); return; } s->regs[addr] = val32; break; case IBEX_SPI_HOST_COMMAND: s->regs[addr] = val32; /* STALL, IP not enabled */ if (!(FIELD_EX32(s->regs[IBEX_SPI_HOST_CONTROL], CONTROL, SPIEN))) { return; } /* SPI not ready, IRQ Error */ if (!(FIELD_EX32(s->regs[IBEX_SPI_HOST_STATUS], STATUS, READY))) { s->regs[IBEX_SPI_HOST_ERROR_STATUS] |= R_ERROR_STATUS_CMDBUSY_MASK; ibex_spi_host_irq(s); return; } /* Assert Not Ready */ s->regs[IBEX_SPI_HOST_STATUS] &= ~R_STATUS_READY_MASK; if (FIELD_EX32(val32, COMMAND, DIRECTION) != BIDIRECTIONAL_TRANSFER) { qemu_log_mask(LOG_UNIMP, "%s: Rx Only/Tx Only are not supported\n", __func__); } if (val32 & R_COMMAND_CSAAT_MASK) { qemu_log_mask(LOG_UNIMP, "%s: CSAAT is not supported\n", __func__); } if (val32 & R_COMMAND_SPEED_MASK) { qemu_log_mask(LOG_UNIMP, "%s: SPEED is not supported\n", __func__); } /* Set Transfer Callback */ timer_mod(s->fifo_trigger_handle, qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) + (TX_INTERRUPT_TRIGGER_DELAY_NS)); break; case IBEX_SPI_HOST_TXDATA: /* * This is a hardware `feature` where * the first word written to TXDATA after init is omitted entirely */ if (s->init_status) { s->init_status = false; return; } for (int i = 0; i < 4; ++i) { /* Attempting to write when TXFULL */ if (fifo8_is_full(&s->tx_fifo)) { /* Assert RXEMPTY, no IRQ */ s->regs[IBEX_SPI_HOST_STATUS] |= R_STATUS_TXFULL_MASK; s->regs[IBEX_SPI_HOST_ERROR_STATUS] |= R_ERROR_STATUS_OVERFLOW_MASK; ibex_spi_host_irq(s); return; } /* Byte ordering is set by the IP */ status = s->regs[IBEX_SPI_HOST_STATUS]; if (FIELD_EX32(status, STATUS, BYTEORDER) == 0) { /* LE: LSB transmitted first (default for ibex processor) */ shift_mask = 0xff << (i * 8); } else { /* BE: MSB transmitted first */ qemu_log_mask(LOG_UNIMP, "%s: Big endian is not supported\n", __func__); } fifo8_push(&s->tx_fifo, (val32 & shift_mask) >> (i * 8)); } status = s->regs[IBEX_SPI_HOST_STATUS]; /* Reset TXEMPTY */ status = FIELD_DP32(status, STATUS, TXEMPTY, 0); /* Update TXQD */ txqd_len = FIELD_EX32(status, STATUS, TXQD); /* Partial bytes (size < 4) are padded, in words. */ txqd_len += 1; status = FIELD_DP32(status, STATUS, TXQD, txqd_len); /* Assert Ready */ status = FIELD_DP32(status, STATUS, READY, 1); /* Update register status */ s->regs[IBEX_SPI_HOST_STATUS] = status; break; case IBEX_SPI_HOST_ERROR_ENABLE: s->regs[addr] = val32; if (val32 & R_ERROR_ENABLE_CMDINVAL_MASK) { qemu_log_mask(LOG_UNIMP, "%s: Segment Length is not supported\n", __func__); } break; case IBEX_SPI_HOST_ERROR_STATUS: /* * Indicates any errors that have occurred. * When an error occurs, the corresponding bit must be cleared * here before issuing any further commands */ status = s->regs[addr]; /* rw1c status register */ if (FIELD_EX32(val32, ERROR_STATUS, CMDBUSY)) { status = FIELD_DP32(status, ERROR_STATUS, CMDBUSY, 0); } if (FIELD_EX32(val32, ERROR_STATUS, OVERFLOW)) { status = FIELD_DP32(status, ERROR_STATUS, OVERFLOW, 0); } if (FIELD_EX32(val32, ERROR_STATUS, UNDERFLOW)) { status = FIELD_DP32(status, ERROR_STATUS, UNDERFLOW, 0); } if (FIELD_EX32(val32, ERROR_STATUS, CMDINVAL)) { status = FIELD_DP32(status, ERROR_STATUS, CMDINVAL, 0); } if (FIELD_EX32(val32, ERROR_STATUS, CSIDINVAL)) { status = FIELD_DP32(status, ERROR_STATUS, CSIDINVAL, 0); } if (FIELD_EX32(val32, ERROR_STATUS, ACCESSINVAL)) { status = FIELD_DP32(status, ERROR_STATUS, ACCESSINVAL, 0); } s->regs[addr] = status; break; case IBEX_SPI_HOST_EVENT_ENABLE: /* Controls which classes of SPI events raise an interrupt. */ s->regs[addr] = val32; if (val32 & R_EVENT_ENABLE_RXWM_MASK) { qemu_log_mask(LOG_UNIMP, "%s: RXWM is not supported\n", __func__); } if (val32 & R_EVENT_ENABLE_TXWM_MASK) { qemu_log_mask(LOG_UNIMP, "%s: TXWM is not supported\n", __func__); } if (val32 & R_EVENT_ENABLE_IDLE_MASK) { qemu_log_mask(LOG_UNIMP, "%s: IDLE is not supported\n", __func__); } break; default: qemu_log_mask(LOG_GUEST_ERROR, "Bad offset 0x%" HWADDR_PRIx "\n", addr << 2); } } static const MemoryRegionOps ibex_spi_ops = { .read = ibex_spi_host_read, .write = ibex_spi_host_write, /* Ibex default LE */ .endianness = DEVICE_LITTLE_ENDIAN, }; static Property ibex_spi_properties[] = { DEFINE_PROP_UINT32("num_cs", IbexSPIHostState, num_cs, 1), DEFINE_PROP_END_OF_LIST(), }; static const VMStateDescription vmstate_ibex = { .name = TYPE_IBEX_SPI_HOST, .version_id = 1, .minimum_version_id = 1, .fields = (VMStateField[]) { VMSTATE_UINT32_ARRAY(regs, IbexSPIHostState, IBEX_SPI_HOST_MAX_REGS), VMSTATE_VARRAY_UINT32(config_opts, IbexSPIHostState, num_cs, 0, vmstate_info_uint32, uint32_t), VMSTATE_FIFO8(rx_fifo, IbexSPIHostState), VMSTATE_FIFO8(tx_fifo, IbexSPIHostState), VMSTATE_TIMER_PTR(fifo_trigger_handle, IbexSPIHostState), VMSTATE_BOOL(init_status, IbexSPIHostState), VMSTATE_END_OF_LIST() } }; static void fifo_trigger_update(void *opaque) { IbexSPIHostState *s = opaque; ibex_spi_host_transfer(s); } static void ibex_spi_host_realize(DeviceState *dev, Error **errp) { IbexSPIHostState *s = IBEX_SPI_HOST(dev); int i; s->ssi = ssi_create_bus(dev, "ssi"); s->cs_lines = g_new0(qemu_irq, s->num_cs); for (i = 0; i < s->num_cs; ++i) { sysbus_init_irq(SYS_BUS_DEVICE(dev), &s->cs_lines[i]); } /* Setup CONFIGOPTS Multi-register */ s->config_opts = g_new0(uint32_t, s->num_cs); /* Setup FIFO Interrupt Timer */ s->fifo_trigger_handle = timer_new_ns(QEMU_CLOCK_VIRTUAL, fifo_trigger_update, s); /* FIFO sizes as per OT Spec */ fifo8_create(&s->tx_fifo, IBEX_SPI_HOST_TXFIFO_LEN); fifo8_create(&s->rx_fifo, IBEX_SPI_HOST_RXFIFO_LEN); } static void ibex_spi_host_init(Object *obj) { IbexSPIHostState *s = IBEX_SPI_HOST(obj); sysbus_init_irq(SYS_BUS_DEVICE(obj), &s->host_err); sysbus_init_irq(SYS_BUS_DEVICE(obj), &s->event); memory_region_init_io(&s->mmio, obj, &ibex_spi_ops, s, TYPE_IBEX_SPI_HOST, 0x1000); sysbus_init_mmio(SYS_BUS_DEVICE(obj), &s->mmio); } static void ibex_spi_host_class_init(ObjectClass *klass, void *data) { DeviceClass *dc = DEVICE_CLASS(klass); dc->realize = ibex_spi_host_realize; dc->reset = ibex_spi_host_reset; dc->vmsd = &vmstate_ibex; device_class_set_props(dc, ibex_spi_properties); } static const TypeInfo ibex_spi_host_info = { .name = TYPE_IBEX_SPI_HOST, .parent = TYPE_SYS_BUS_DEVICE, .instance_size = sizeof(IbexSPIHostState), .instance_init = ibex_spi_host_init, .class_init = ibex_spi_host_class_init, }; static void ibex_spi_host_register_types(void) { type_register_static(&ibex_spi_host_info); } type_init(ibex_spi_host_register_types)