hw/net/can/can_mioe3680_pci.c

   1 /*
   2  * MIOe-3680 PCI CAN device (SJA1000 based) emulation
   3  *
   4  * Copyright (c) 2016 Deniz Eren (deniz.eren@icloud.com)
   5  *
   6  * Based on Kvaser PCI CAN device (SJA1000 based) emulation implemented by
   7  * Jin Yang and Pavel Pisa
   8  *
   9  * Permission is hereby granted, free of charge, to any person obtaining a copy
  10  * of this software and associated documentation files (the "Software"), to deal
  11  * in the Software without restriction, including without limitation the rights
  12  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  13  * copies of the Software, and to permit persons to whom the Software is
  14  * furnished to do so, subject to the following conditions:
  15  *
  16  * The above copyright notice and this permission notice shall be included in
  17  * all copies or substantial portions of the Software.
  18  *
  19  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  20  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  21  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  22  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  23  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  24  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  25  * THE SOFTWARE.
  26  */
  27
  28 #include "qemu/osdep.h"
  29 #include "qemu/event_notifier.h"
  30 #include "qemu/module.h"
  31 #include "qemu/thread.h"
  32 #include "qemu/sockets.h"
  33 #include "qapi/error.h"
  34 #include "chardev/char.h"
  35 #include "hw/irq.h"
  36 #include "hw/pci/pci.h"
  37 #include "hw/qdev-properties.h"
  38 #include "migration/vmstate.h"
  39 #include "net/can_emu.h"
  40
  41 #include "can_sja1000.h"
  42 #include "qom/object.h"
  43
  44 #define TYPE_CAN_PCI_DEV "mioe3680_pci"
  45
  46 typedef struct Mioe3680PCIState Mioe3680PCIState;
  47 DECLARE_INSTANCE_CHECKER(Mioe3680PCIState, MIOe3680_PCI_DEV,
  48                          TYPE_CAN_PCI_DEV)
  49
  50 /* the PCI device and vendor IDs */
  51 #ifndef MIOe3680_PCI_VENDOR_ID1
  52 #define MIOe3680_PCI_VENDOR_ID1     0x13fe
  53 #endif
  54
  55 #ifndef MIOe3680_PCI_DEVICE_ID1
  56 #define MIOe3680_PCI_DEVICE_ID1     0xc302
  57 #endif
  58
  59 #define MIOe3680_PCI_SJA_COUNT     2
  60 #define MIOe3680_PCI_SJA_RANGE     0x400
  61
  62 #define MIOe3680_PCI_BYTES_PER_SJA 0x80
  63
  64 struct Mioe3680PCIState {
  65     /*< private >*/
  66     PCIDevice       dev;
  67     /*< public >*/
  68     MemoryRegion    sja_io[MIOe3680_PCI_SJA_COUNT];
  69
  70     CanSJA1000State sja_state[MIOe3680_PCI_SJA_COUNT];
  71     qemu_irq        irq;
  72
  73     char            *model; /* The model that support, only SJA1000 now. */
  74     CanBusState     *canbus[MIOe3680_PCI_SJA_COUNT];
  75 };
  76
  77 static void mioe3680_pci_reset(DeviceState *dev)
  78 {
  79     Mioe3680PCIState *d = MIOe3680_PCI_DEV(dev);
  80     int i;
  81
  82     for (i = 0 ; i < MIOe3680_PCI_SJA_COUNT; i++) {
  83         can_sja_hardware_reset(&d->sja_state[i]);
  84     }
  85 }
  86
  87 static uint64_t mioe3680_pci_sja1_io_read(void *opaque, hwaddr addr,
  88                                           unsigned size)
  89 {
  90     Mioe3680PCIState *d = opaque;
  91     CanSJA1000State *s = &d->sja_state[0];
  92
  93     if (addr >= MIOe3680_PCI_BYTES_PER_SJA) {
  94         return 0;
  95     }
  96
  97     return can_sja_mem_read(s, addr >> 2, size);
  98 }
  99
 100 static void mioe3680_pci_sja1_io_write(void *opaque, hwaddr addr, uint64_t data,
 101                              unsigned size)
 102 {
 103     Mioe3680PCIState *d = opaque;
 104     CanSJA1000State *s = &d->sja_state[0];
 105
 106     if (addr >= MIOe3680_PCI_BYTES_PER_SJA) {
 107         return;
 108     }
 109
 110     can_sja_mem_write(s, addr >> 2, data, size);
 111 }
 112
 113 static uint64_t mioe3680_pci_sja2_io_read(void *opaque, hwaddr addr,
 114                                           unsigned size)
 115 {
 116     Mioe3680PCIState *d = opaque;
 117     CanSJA1000State *s = &d->sja_state[1];
 118
 119     if (addr >= MIOe3680_PCI_BYTES_PER_SJA) {
 120         return 0;
 121     }
 122
 123     return can_sja_mem_read(s, addr >> 2, size);
 124 }
 125
 126 static void mioe3680_pci_sja2_io_write(void *opaque, hwaddr addr, uint64_t data,
 127                              unsigned size)
 128 {
 129     Mioe3680PCIState *d = opaque;
 130     CanSJA1000State *s = &d->sja_state[1];
 131
 132     if (addr >= MIOe3680_PCI_BYTES_PER_SJA) {
 133         return;
 134     }
 135
 136     can_sja_mem_write(s, addr >> 2, data, size);
 137 }
 138
 139 static const MemoryRegionOps mioe3680_pci_sja1_io_ops = {
 140     .read = mioe3680_pci_sja1_io_read,
 141     .write = mioe3680_pci_sja1_io_write,
 142     .endianness = DEVICE_LITTLE_ENDIAN,
 143     .impl = {
 144         .max_access_size = 1,
 145     },
 146 };
 147
 148 static const MemoryRegionOps mioe3680_pci_sja2_io_ops = {
 149     .read = mioe3680_pci_sja2_io_read,
 150     .write = mioe3680_pci_sja2_io_write,
 151     .endianness = DEVICE_LITTLE_ENDIAN,
 152     .impl = {
 153         .max_access_size = 1,
 154     },
 155 };
 156
 157 static void mioe3680_pci_realize(PCIDevice *pci_dev, Error **errp)
 158 {
 159     Mioe3680PCIState *d = MIOe3680_PCI_DEV(pci_dev);
 160     uint8_t *pci_conf;
 161     int i;
 162
 163     pci_conf = pci_dev->config;
 164     pci_conf[PCI_INTERRUPT_PIN] = 0x01; /* interrupt pin A */
 165
 166     d->irq = pci_allocate_irq(&d->dev);
 167
 168     for (i = 0 ; i < MIOe3680_PCI_SJA_COUNT; i++) {
 169         can_sja_init(&d->sja_state[i], d->irq);
 170     }
 171
 172     for (i = 0 ; i < MIOe3680_PCI_SJA_COUNT; i++) {
 173         if (can_sja_connect_to_bus(&d->sja_state[i], d->canbus[i]) < 0) {
 174             error_setg(errp, "can_sja_connect_to_bus failed");
 175             return;
 176         }
 177     }
 178
 179     memory_region_init_io(&d->sja_io[0], OBJECT(d), &mioe3680_pci_sja1_io_ops,
 180                           d, "mioe3680_pci-sja1", MIOe3680_PCI_SJA_RANGE);
 181     memory_region_init_io(&d->sja_io[1], OBJECT(d), &mioe3680_pci_sja2_io_ops,
 182                           d, "mioe3680_pci-sja2", MIOe3680_PCI_SJA_RANGE);
 183
 184     for (i = 0 ; i < MIOe3680_PCI_SJA_COUNT; i++) {
 185         pci_register_bar(&d->dev, /*BAR*/ i, PCI_BASE_ADDRESS_SPACE_IO,
 186                          &d->sja_io[i]);
 187     }
 188 }
 189
 190 static void mioe3680_pci_exit(PCIDevice *pci_dev)
 191 {
 192     Mioe3680PCIState *d = MIOe3680_PCI_DEV(pci_dev);
 193     int i;
 194
 195     for (i = 0 ; i < MIOe3680_PCI_SJA_COUNT; i++) {
 196         can_sja_disconnect(&d->sja_state[i]);
 197     }
 198
 199     qemu_free_irq(d->irq);
 200 }
 201
 202 static const VMStateDescription vmstate_mioe3680_pci = {
 203     .name = "mioe3680_pci",
 204     .version_id = 1,
 205     .minimum_version_id = 1,
 206     .minimum_version_id_old = 1,
 207     .fields = (VMStateField[]) {
 208         VMSTATE_PCI_DEVICE(dev, Mioe3680PCIState),
 209         VMSTATE_STRUCT(sja_state[0], Mioe3680PCIState, 0, vmstate_can_sja,
 210                        CanSJA1000State),
 211         VMSTATE_STRUCT(sja_state[1], Mioe3680PCIState, 0, vmstate_can_sja,
 212                        CanSJA1000State),
 213         VMSTATE_END_OF_LIST()
 214     }
 215 };
 216
 217 static void mioe3680_pci_instance_init(Object *obj)
 218 {
 219     Mioe3680PCIState *d = MIOe3680_PCI_DEV(obj);
 220
 221     object_property_add_link(obj, "canbus0", TYPE_CAN_BUS,
 222                              (Object **)&d->canbus[0],
 223                              qdev_prop_allow_set_link_before_realize,
 224                              0);
 225     object_property_add_link(obj, "canbus1", TYPE_CAN_BUS,
 226                              (Object **)&d->canbus[1],
 227                              qdev_prop_allow_set_link_before_realize,
 228                              0);
 229 }
 230
 231 static void mioe3680_pci_class_init(ObjectClass *klass, void *data)
 232 {
 233     DeviceClass *dc = DEVICE_CLASS(klass);
 234     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
 235
 236     k->realize = mioe3680_pci_realize;
 237     k->exit = mioe3680_pci_exit;
 238     k->vendor_id = MIOe3680_PCI_VENDOR_ID1;
 239     k->device_id = MIOe3680_PCI_DEVICE_ID1;
 240     k->revision = 0x00;
 241     k->class_id = 0x000c09;
 242     k->subsystem_vendor_id = MIOe3680_PCI_VENDOR_ID1;
 243     k->subsystem_id = MIOe3680_PCI_DEVICE_ID1;
 244     dc->desc = "Mioe3680 PCICANx";
 245     dc->vmsd = &vmstate_mioe3680_pci;
 246     set_bit(DEVICE_CATEGORY_MISC, dc->categories);
 247     dc->reset = mioe3680_pci_reset;
 248 }
 249
 250 static const TypeInfo mioe3680_pci_info = {
 251     .name          = TYPE_CAN_PCI_DEV,
 252     .parent        = TYPE_PCI_DEVICE,
 253     .instance_size = sizeof(Mioe3680PCIState),
 254     .class_init    = mioe3680_pci_class_init,
 255     .instance_init = mioe3680_pci_instance_init,
 256     .interfaces = (InterfaceInfo[]) {
 257         { INTERFACE_CONVENTIONAL_PCI_DEVICE },
 258         { },
 259     },
 260 };
 261
 262 static void mioe3680_pci_register_types(void)
 263 {
 264     type_register_static(&mioe3680_pci_info);
 265 }
 266
 267 type_init(mioe3680_pci_register_types)