/* * Kvaser PCI CAN device (SJA1000 based) emulation * * Copyright (c) 2013-2014 Jin Yang * Copyright (c) 2014-2018 Pavel Pisa * * Partially based on educational PCIexpress APOHW hardware * emulator used fro class A0B36APO at CTU FEE course by * Rostislav Lisovy and Pavel Pisa * * Initial development supported by Google GSoC 2013 from RTEMS project slot * * 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/event_notifier.h" #include "qemu/module.h" #include "qemu/thread.h" #include "qemu/sockets.h" #include "qapi/error.h" #include "chardev/char.h" #include "hw/irq.h" #include "hw/pci/pci.h" #include "migration/vmstate.h" #include "net/can_emu.h" #include "can_sja1000.h" #define TYPE_CAN_PCI_DEV "kvaser_pci" #define KVASER_PCI_DEV(obj) \ OBJECT_CHECK(KvaserPCIState, (obj), TYPE_CAN_PCI_DEV) #ifndef KVASER_PCI_VENDOR_ID1 #define KVASER_PCI_VENDOR_ID1 0x10e8 /* the PCI device and vendor IDs */ #endif #ifndef KVASER_PCI_DEVICE_ID1 #define KVASER_PCI_DEVICE_ID1 0x8406 #endif #define KVASER_PCI_S5920_RANGE 0x80 #define KVASER_PCI_SJA_RANGE 0x80 #define KVASER_PCI_XILINX_RANGE 0x8 #define KVASER_PCI_BYTES_PER_SJA 0x20 #define S5920_OMB 0x0C #define S5920_IMB 0x1C #define S5920_MBEF 0x34 #define S5920_INTCSR 0x38 #define S5920_RCR 0x3C #define S5920_PTCR 0x60 #define S5920_INTCSR_ADDON_INTENABLE_M 0x2000 #define S5920_INTCSR_INTERRUPT_ASSERTED_M 0x800000 #define KVASER_PCI_XILINX_VERINT 7 /* Lower nibble simulate interrupts, high nibble version number. */ #define KVASER_PCI_XILINX_VERSION_NUMBER 13 typedef struct KvaserPCIState { /*< private >*/ PCIDevice dev; /*< public >*/ MemoryRegion s5920_io; MemoryRegion sja_io; MemoryRegion xilinx_io; CanSJA1000State sja_state; qemu_irq irq; uint32_t s5920_intcsr; uint32_t s5920_irqstate; CanBusState *canbus; } KvaserPCIState; static void kvaser_pci_irq_handler(void *opaque, int irq_num, int level) { KvaserPCIState *d = (KvaserPCIState *)opaque; d->s5920_irqstate = level; if (d->s5920_intcsr & S5920_INTCSR_ADDON_INTENABLE_M) { pci_set_irq(&d->dev, level); } } static void kvaser_pci_reset(DeviceState *dev) { KvaserPCIState *d = KVASER_PCI_DEV(dev); CanSJA1000State *s = &d->sja_state; can_sja_hardware_reset(s); } static uint64_t kvaser_pci_s5920_io_read(void *opaque, hwaddr addr, unsigned size) { KvaserPCIState *d = opaque; uint64_t val; switch (addr) { case S5920_INTCSR: val = d->s5920_intcsr; val &= ~S5920_INTCSR_INTERRUPT_ASSERTED_M; if (d->s5920_irqstate) { val |= S5920_INTCSR_INTERRUPT_ASSERTED_M; } return val; } return 0; } static void kvaser_pci_s5920_io_write(void *opaque, hwaddr addr, uint64_t data, unsigned size) { KvaserPCIState *d = opaque; switch (addr) { case S5920_INTCSR: if (d->s5920_irqstate && ((d->s5920_intcsr ^ data) & S5920_INTCSR_ADDON_INTENABLE_M)) { pci_set_irq(&d->dev, !!(data & S5920_INTCSR_ADDON_INTENABLE_M)); } d->s5920_intcsr = data; break; } } static uint64_t kvaser_pci_sja_io_read(void *opaque, hwaddr addr, unsigned size) { KvaserPCIState *d = opaque; CanSJA1000State *s = &d->sja_state; if (addr >= KVASER_PCI_BYTES_PER_SJA) { return 0; } return can_sja_mem_read(s, addr, size); } static void kvaser_pci_sja_io_write(void *opaque, hwaddr addr, uint64_t data, unsigned size) { KvaserPCIState *d = opaque; CanSJA1000State *s = &d->sja_state; if (addr >= KVASER_PCI_BYTES_PER_SJA) { return; } can_sja_mem_write(s, addr, data, size); } static uint64_t kvaser_pci_xilinx_io_read(void *opaque, hwaddr addr, unsigned size) { switch (addr) { case KVASER_PCI_XILINX_VERINT: return (KVASER_PCI_XILINX_VERSION_NUMBER << 4) | 0; } return 0; } static void kvaser_pci_xilinx_io_write(void *opaque, hwaddr addr, uint64_t data, unsigned size) { } static const MemoryRegionOps kvaser_pci_s5920_io_ops = { .read = kvaser_pci_s5920_io_read, .write = kvaser_pci_s5920_io_write, .endianness = DEVICE_LITTLE_ENDIAN, .impl = { .min_access_size = 4, .max_access_size = 4, }, }; static const MemoryRegionOps kvaser_pci_sja_io_ops = { .read = kvaser_pci_sja_io_read, .write = kvaser_pci_sja_io_write, .endianness = DEVICE_LITTLE_ENDIAN, .impl = { .max_access_size = 1, }, }; static const MemoryRegionOps kvaser_pci_xilinx_io_ops = { .read = kvaser_pci_xilinx_io_read, .write = kvaser_pci_xilinx_io_write, .endianness = DEVICE_LITTLE_ENDIAN, .impl = { .max_access_size = 1, }, }; static void kvaser_pci_realize(PCIDevice *pci_dev, Error **errp) { KvaserPCIState *d = KVASER_PCI_DEV(pci_dev); CanSJA1000State *s = &d->sja_state; uint8_t *pci_conf; pci_conf = pci_dev->config; pci_conf[PCI_INTERRUPT_PIN] = 0x01; /* interrupt pin A */ d->irq = qemu_allocate_irq(kvaser_pci_irq_handler, d, 0); can_sja_init(s, d->irq); if (can_sja_connect_to_bus(s, d->canbus) < 0) { error_setg(errp, "can_sja_connect_to_bus failed"); return; } memory_region_init_io(&d->s5920_io, OBJECT(d), &kvaser_pci_s5920_io_ops, d, "kvaser_pci-s5920", KVASER_PCI_S5920_RANGE); memory_region_init_io(&d->sja_io, OBJECT(d), &kvaser_pci_sja_io_ops, d, "kvaser_pci-sja", KVASER_PCI_SJA_RANGE); memory_region_init_io(&d->xilinx_io, OBJECT(d), &kvaser_pci_xilinx_io_ops, d, "kvaser_pci-xilinx", KVASER_PCI_XILINX_RANGE); pci_register_bar(&d->dev, /*BAR*/ 0, PCI_BASE_ADDRESS_SPACE_IO, &d->s5920_io); pci_register_bar(&d->dev, /*BAR*/ 1, PCI_BASE_ADDRESS_SPACE_IO, &d->sja_io); pci_register_bar(&d->dev, /*BAR*/ 2, PCI_BASE_ADDRESS_SPACE_IO, &d->xilinx_io); } static void kvaser_pci_exit(PCIDevice *pci_dev) { KvaserPCIState *d = KVASER_PCI_DEV(pci_dev); CanSJA1000State *s = &d->sja_state; can_sja_disconnect(s); qemu_free_irq(d->irq); } static const VMStateDescription vmstate_kvaser_pci = { .name = "kvaser_pci", .version_id = 1, .minimum_version_id = 1, .minimum_version_id_old = 1, .fields = (VMStateField[]) { VMSTATE_PCI_DEVICE(dev, KvaserPCIState), /* Load this before sja_state. */ VMSTATE_UINT32(s5920_intcsr, KvaserPCIState), VMSTATE_STRUCT(sja_state, KvaserPCIState, 0, vmstate_can_sja, CanSJA1000State), VMSTATE_END_OF_LIST() } }; static void kvaser_pci_instance_init(Object *obj) { KvaserPCIState *d = KVASER_PCI_DEV(obj); object_property_add_link(obj, "canbus", TYPE_CAN_BUS, (Object **)&d->canbus, qdev_prop_allow_set_link_before_realize, 0, &error_abort); } static void kvaser_pci_class_init(ObjectClass *klass, void *data) { DeviceClass *dc = DEVICE_CLASS(klass); PCIDeviceClass *k = PCI_DEVICE_CLASS(klass); k->realize = kvaser_pci_realize; k->exit = kvaser_pci_exit; k->vendor_id = KVASER_PCI_VENDOR_ID1; k->device_id = KVASER_PCI_DEVICE_ID1; k->revision = 0x00; k->class_id = 0x00ff00; dc->desc = "Kvaser PCICANx"; dc->vmsd = &vmstate_kvaser_pci; dc->reset = kvaser_pci_reset; set_bit(DEVICE_CATEGORY_MISC, dc->categories); } static const TypeInfo kvaser_pci_info = { .name = TYPE_CAN_PCI_DEV, .parent = TYPE_PCI_DEVICE, .instance_size = sizeof(KvaserPCIState), .class_init = kvaser_pci_class_init, .instance_init = kvaser_pci_instance_init, .interfaces = (InterfaceInfo[]) { { INTERFACE_CONVENTIONAL_PCI_DEVICE }, { }, }, }; static void kvaser_pci_register_types(void) { type_register_static(&kvaser_pci_info); } type_init(kvaser_pci_register_types)