hw/net/can/can_pcm3680_pci.c

   1 /*
   2  * PCM-3680i 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
  43 #define TYPE_CAN_PCI_DEV "pcm3680_pci"
  44
  45 #define PCM3680i_PCI_DEV(obj) \
  46     OBJECT_CHECK(Pcm3680iPCIState, (obj), TYPE_CAN_PCI_DEV)
  47
  48 /* the PCI device and vendor IDs */
  49 #ifndef PCM3680i_PCI_VENDOR_ID1
  50 #define PCM3680i_PCI_VENDOR_ID1     0x13fe
  51 #endif
  52
  53 #ifndef PCM3680i_PCI_DEVICE_ID1
  54 #define PCM3680i_PCI_DEVICE_ID1     0xc002
  55 #endif
  56
  57 #define PCM3680i_PCI_SJA_COUNT     2
  58 #define PCM3680i_PCI_SJA_RANGE     0x100
  59
  60 #define PCM3680i_PCI_BYTES_PER_SJA 0x20
  61
  62 typedef struct Pcm3680iPCIState {
  63     /*< private >*/
  64     PCIDevice       dev;
  65     /*< public >*/
  66     MemoryRegion    sja_io[PCM3680i_PCI_SJA_COUNT];
  67
  68     CanSJA1000State sja_state[PCM3680i_PCI_SJA_COUNT];
  69     qemu_irq        irq;
  70
  71     char            *model; /* The model that support, only SJA1000 now. */
  72     CanBusState     *canbus[PCM3680i_PCI_SJA_COUNT];
  73 } Pcm3680iPCIState;
  74
  75 static void pcm3680i_pci_reset(DeviceState *dev)
  76 {
  77     Pcm3680iPCIState *d = PCM3680i_PCI_DEV(dev);
  78     int i;
  79
  80     for (i = 0; i < PCM3680i_PCI_SJA_COUNT; i++) {
  81         can_sja_hardware_reset(&d->sja_state[i]);
  82     }
  83 }
  84
  85 static uint64_t pcm3680i_pci_sja1_io_read(void *opaque, hwaddr addr,
  86                                           unsigned size)
  87 {
  88     Pcm3680iPCIState *d = opaque;
  89     CanSJA1000State *s = &d->sja_state[0];
  90
  91     if (addr >= PCM3680i_PCI_BYTES_PER_SJA) {
  92         return 0;
  93     }
  94
  95     return can_sja_mem_read(s, addr, size);
  96 }
  97
  98 static void pcm3680i_pci_sja1_io_write(void *opaque, hwaddr addr,
  99                                        uint64_t data, unsigned size)
 100 {
 101     Pcm3680iPCIState *d = opaque;
 102     CanSJA1000State *s = &d->sja_state[0];
 103
 104     if (addr >= PCM3680i_PCI_BYTES_PER_SJA) {
 105         return;
 106     }
 107
 108     can_sja_mem_write(s, addr, data, size);
 109 }
 110
 111 static uint64_t pcm3680i_pci_sja2_io_read(void *opaque, hwaddr addr,
 112                                           unsigned size)
 113 {
 114     Pcm3680iPCIState *d = opaque;
 115     CanSJA1000State *s = &d->sja_state[1];
 116
 117     if (addr >= PCM3680i_PCI_BYTES_PER_SJA) {
 118         return 0;
 119     }
 120
 121     return can_sja_mem_read(s, addr, size);
 122 }
 123
 124 static void pcm3680i_pci_sja2_io_write(void *opaque, hwaddr addr, uint64_t data,
 125                              unsigned size)
 126 {
 127     Pcm3680iPCIState *d = opaque;
 128     CanSJA1000State *s = &d->sja_state[1];
 129
 130     if (addr >= PCM3680i_PCI_BYTES_PER_SJA) {
 131         return;
 132     }
 133
 134     can_sja_mem_write(s, addr, data, size);
 135 }
 136
 137 static const MemoryRegionOps pcm3680i_pci_sja1_io_ops = {
 138     .read = pcm3680i_pci_sja1_io_read,
 139     .write = pcm3680i_pci_sja1_io_write,
 140     .endianness = DEVICE_LITTLE_ENDIAN,
 141     .impl = {
 142         .max_access_size = 1,
 143     },
 144 };
 145
 146 static const MemoryRegionOps pcm3680i_pci_sja2_io_ops = {
 147     .read = pcm3680i_pci_sja2_io_read,
 148     .write = pcm3680i_pci_sja2_io_write,
 149     .endianness = DEVICE_LITTLE_ENDIAN,
 150     .impl = {
 151         .max_access_size = 1,
 152     },
 153 };
 154
 155 static void pcm3680i_pci_realize(PCIDevice *pci_dev, Error **errp)
 156 {
 157     Pcm3680iPCIState *d = PCM3680i_PCI_DEV(pci_dev);
 158     uint8_t *pci_conf;
 159     int i;
 160
 161     pci_conf = pci_dev->config;
 162     pci_conf[PCI_INTERRUPT_PIN] = 0x01; /* interrupt pin A */
 163
 164     d->irq = pci_allocate_irq(&d->dev);
 165
 166     for (i = 0; i < PCM3680i_PCI_SJA_COUNT; i++) {
 167         can_sja_init(&d->sja_state[i], d->irq);
 168     }
 169
 170     for (i = 0; i < PCM3680i_PCI_SJA_COUNT; i++) {
 171         if (can_sja_connect_to_bus(&d->sja_state[i], d->canbus[i]) < 0) {
 172             error_setg(errp, "can_sja_connect_to_bus failed");
 173             return;
 174         }
 175     }
 176
 177     memory_region_init_io(&d->sja_io[0], OBJECT(d), &pcm3680i_pci_sja1_io_ops,
 178                           d, "pcm3680i_pci-sja1", PCM3680i_PCI_SJA_RANGE);
 179
 180     memory_region_init_io(&d->sja_io[1], OBJECT(d), &pcm3680i_pci_sja2_io_ops,
 181                           d, "pcm3680i_pci-sja2", PCM3680i_PCI_SJA_RANGE);
 182
 183     for (i = 0; i < PCM3680i_PCI_SJA_COUNT; i++) {
 184         pci_register_bar(&d->dev, /*BAR*/ i, PCI_BASE_ADDRESS_SPACE_IO,
 185                          &d->sja_io[i]);
 186     }
 187 }
 188
 189 static void pcm3680i_pci_exit(PCIDevice *pci_dev)
 190 {
 191     Pcm3680iPCIState *d = PCM3680i_PCI_DEV(pci_dev);
 192     int i;
 193
 194     for (i = 0; i < PCM3680i_PCI_SJA_COUNT; i++) {
 195         can_sja_disconnect(&d->sja_state[i]);
 196     }
 197
 198     qemu_free_irq(d->irq);
 199 }
 200
 201 static const VMStateDescription vmstate_pcm3680i_pci = {
 202     .name = "pcm3680i_pci",
 203     .version_id = 1,
 204     .minimum_version_id = 1,
 205     .minimum_version_id_old = 1,
 206     .fields = (VMStateField[]) {
 207         VMSTATE_PCI_DEVICE(dev, Pcm3680iPCIState),
 208         VMSTATE_STRUCT(sja_state[0], Pcm3680iPCIState, 0,
 209                        vmstate_can_sja, CanSJA1000State),
 210         VMSTATE_STRUCT(sja_state[1], Pcm3680iPCIState, 0,
 211                        vmstate_can_sja, CanSJA1000State),
 212         VMSTATE_END_OF_LIST()
 213     }
 214 };
 215
 216 static void pcm3680i_pci_instance_init(Object *obj)
 217 {
 218     Pcm3680iPCIState *d = PCM3680i_PCI_DEV(obj);
 219
 220     object_property_add_link(obj, "canbus0", TYPE_CAN_BUS,
 221                              (Object **)&d->canbus[0],
 222                              qdev_prop_allow_set_link_before_realize,
 223                              0);
 224     object_property_add_link(obj, "canbus1", TYPE_CAN_BUS,
 225                              (Object **)&d->canbus[1],
 226                              qdev_prop_allow_set_link_before_realize,
 227                              0);
 228 }
 229
 230 static void pcm3680i_pci_class_init(ObjectClass *klass, void *data)
 231 {
 232     DeviceClass *dc = DEVICE_CLASS(klass);
 233     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
 234
 235     k->realize = pcm3680i_pci_realize;
 236     k->exit = pcm3680i_pci_exit;
 237     k->vendor_id = PCM3680i_PCI_VENDOR_ID1;
 238     k->device_id = PCM3680i_PCI_DEVICE_ID1;
 239     k->revision = 0x00;
 240     k->class_id = 0x000c09;
 241     k->subsystem_vendor_id = PCM3680i_PCI_VENDOR_ID1;
 242     k->subsystem_id = PCM3680i_PCI_DEVICE_ID1;
 243     dc->desc = "Pcm3680i PCICANx";
 244     dc->vmsd = &vmstate_pcm3680i_pci;
 245     set_bit(DEVICE_CATEGORY_MISC, dc->categories);
 246     dc->reset = pcm3680i_pci_reset;
 247 }
 248
 249 static const TypeInfo pcm3680i_pci_info = {
 250     .name          = TYPE_CAN_PCI_DEV,
 251     .parent        = TYPE_PCI_DEVICE,
 252     .instance_size = sizeof(Pcm3680iPCIState),
 253     .class_init    = pcm3680i_pci_class_init,
 254     .instance_init = pcm3680i_pci_instance_init,
 255     .interfaces = (InterfaceInfo[]) {
 256         { INTERFACE_CONVENTIONAL_PCI_DEVICE },
 257         { },
 258     },
 259 };
 260
 261 static void pcm3680i_pci_register_types(void)
 262 {
 263     type_register_static(&pcm3680i_pci_info);
 264 }
 265
 266 type_init(pcm3680i_pci_register_types)