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 #include "qom/object.h"
  43
  44 #define TYPE_CAN_PCI_DEV "pcm3680_pci"
  45
  46 typedef struct Pcm3680iPCIState Pcm3680iPCIState;
  47 #define PCM3680i_PCI_DEV(obj) \
  48     OBJECT_CHECK(Pcm3680iPCIState, (obj), TYPE_CAN_PCI_DEV)
  49
  50 /* the PCI device and vendor IDs */
  51 #ifndef PCM3680i_PCI_VENDOR_ID1
  52 #define PCM3680i_PCI_VENDOR_ID1     0x13fe
  53 #endif
  54
  55 #ifndef PCM3680i_PCI_DEVICE_ID1
  56 #define PCM3680i_PCI_DEVICE_ID1     0xc002
  57 #endif
  58
  59 #define PCM3680i_PCI_SJA_COUNT     2
  60 #define PCM3680i_PCI_SJA_RANGE     0x100
  61
  62 #define PCM3680i_PCI_BYTES_PER_SJA 0x20
  63
  64 struct Pcm3680iPCIState {
  65     /*< private >*/
  66     PCIDevice       dev;
  67     /*< public >*/
  68     MemoryRegion    sja_io[PCM3680i_PCI_SJA_COUNT];
  69
  70     CanSJA1000State sja_state[PCM3680i_PCI_SJA_COUNT];
  71     qemu_irq        irq;
  72
  73     char            *model; /* The model that support, only SJA1000 now. */
  74     CanBusState     *canbus[PCM3680i_PCI_SJA_COUNT];
  75 };
  76
  77 static void pcm3680i_pci_reset(DeviceState *dev)
  78 {
  79     Pcm3680iPCIState *d = PCM3680i_PCI_DEV(dev);
  80     int i;
  81
  82     for (i = 0; i < PCM3680i_PCI_SJA_COUNT; i++) {
  83         can_sja_hardware_reset(&d->sja_state[i]);
  84     }
  85 }
  86
  87 static uint64_t pcm3680i_pci_sja1_io_read(void *opaque, hwaddr addr,
  88                                           unsigned size)
  89 {
  90     Pcm3680iPCIState *d = opaque;
  91     CanSJA1000State *s = &d->sja_state[0];
  92
  93     if (addr >= PCM3680i_PCI_BYTES_PER_SJA) {
  94         return 0;
  95     }
  96
  97     return can_sja_mem_read(s, addr, size);
  98 }
  99
 100 static void pcm3680i_pci_sja1_io_write(void *opaque, hwaddr addr,
 101                                        uint64_t data, unsigned size)
 102 {
 103     Pcm3680iPCIState *d = opaque;
 104     CanSJA1000State *s = &d->sja_state[0];
 105
 106     if (addr >= PCM3680i_PCI_BYTES_PER_SJA) {
 107         return;
 108     }
 109
 110     can_sja_mem_write(s, addr, data, size);
 111 }
 112
 113 static uint64_t pcm3680i_pci_sja2_io_read(void *opaque, hwaddr addr,
 114                                           unsigned size)
 115 {
 116     Pcm3680iPCIState *d = opaque;
 117     CanSJA1000State *s = &d->sja_state[1];
 118
 119     if (addr >= PCM3680i_PCI_BYTES_PER_SJA) {
 120         return 0;
 121     }
 122
 123     return can_sja_mem_read(s, addr, size);
 124 }
 125
 126 static void pcm3680i_pci_sja2_io_write(void *opaque, hwaddr addr, uint64_t data,
 127                              unsigned size)
 128 {
 129     Pcm3680iPCIState *d = opaque;
 130     CanSJA1000State *s = &d->sja_state[1];
 131
 132     if (addr >= PCM3680i_PCI_BYTES_PER_SJA) {
 133         return;
 134     }
 135
 136     can_sja_mem_write(s, addr, data, size);
 137 }
 138
 139 static const MemoryRegionOps pcm3680i_pci_sja1_io_ops = {
 140     .read = pcm3680i_pci_sja1_io_read,
 141     .write = pcm3680i_pci_sja1_io_write,
 142     .endianness = DEVICE_LITTLE_ENDIAN,
 143     .impl = {
 144         .max_access_size = 1,
 145     },
 146 };
 147
 148 static const MemoryRegionOps pcm3680i_pci_sja2_io_ops = {
 149     .read = pcm3680i_pci_sja2_io_read,
 150     .write = pcm3680i_pci_sja2_io_write,
 151     .endianness = DEVICE_LITTLE_ENDIAN,
 152     .impl = {
 153         .max_access_size = 1,
 154     },
 155 };
 156
 157 static void pcm3680i_pci_realize(PCIDevice *pci_dev, Error **errp)
 158 {
 159     Pcm3680iPCIState *d = PCM3680i_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 < PCM3680i_PCI_SJA_COUNT; i++) {
 169         can_sja_init(&d->sja_state[i], d->irq);
 170     }
 171
 172     for (i = 0; i < PCM3680i_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), &pcm3680i_pci_sja1_io_ops,
 180                           d, "pcm3680i_pci-sja1", PCM3680i_PCI_SJA_RANGE);
 181
 182     memory_region_init_io(&d->sja_io[1], OBJECT(d), &pcm3680i_pci_sja2_io_ops,
 183                           d, "pcm3680i_pci-sja2", PCM3680i_PCI_SJA_RANGE);
 184
 185     for (i = 0; i < PCM3680i_PCI_SJA_COUNT; i++) {
 186         pci_register_bar(&d->dev, /*BAR*/ i, PCI_BASE_ADDRESS_SPACE_IO,
 187                          &d->sja_io[i]);
 188     }
 189 }
 190
 191 static void pcm3680i_pci_exit(PCIDevice *pci_dev)
 192 {
 193     Pcm3680iPCIState *d = PCM3680i_PCI_DEV(pci_dev);
 194     int i;
 195
 196     for (i = 0; i < PCM3680i_PCI_SJA_COUNT; i++) {
 197         can_sja_disconnect(&d->sja_state[i]);
 198     }
 199
 200     qemu_free_irq(d->irq);
 201 }
 202
 203 static const VMStateDescription vmstate_pcm3680i_pci = {
 204     .name = "pcm3680i_pci",
 205     .version_id = 1,
 206     .minimum_version_id = 1,
 207     .minimum_version_id_old = 1,
 208     .fields = (VMStateField[]) {
 209         VMSTATE_PCI_DEVICE(dev, Pcm3680iPCIState),
 210         VMSTATE_STRUCT(sja_state[0], Pcm3680iPCIState, 0,
 211                        vmstate_can_sja, CanSJA1000State),
 212         VMSTATE_STRUCT(sja_state[1], Pcm3680iPCIState, 0,
 213                        vmstate_can_sja, CanSJA1000State),
 214         VMSTATE_END_OF_LIST()
 215     }
 216 };
 217
 218 static void pcm3680i_pci_instance_init(Object *obj)
 219 {
 220     Pcm3680iPCIState *d = PCM3680i_PCI_DEV(obj);
 221
 222     object_property_add_link(obj, "canbus0", TYPE_CAN_BUS,
 223                              (Object **)&d->canbus[0],
 224                              qdev_prop_allow_set_link_before_realize,
 225                              0);
 226     object_property_add_link(obj, "canbus1", TYPE_CAN_BUS,
 227                              (Object **)&d->canbus[1],
 228                              qdev_prop_allow_set_link_before_realize,
 229                              0);
 230 }
 231
 232 static void pcm3680i_pci_class_init(ObjectClass *klass, void *data)
 233 {
 234     DeviceClass *dc = DEVICE_CLASS(klass);
 235     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
 236
 237     k->realize = pcm3680i_pci_realize;
 238     k->exit = pcm3680i_pci_exit;
 239     k->vendor_id = PCM3680i_PCI_VENDOR_ID1;
 240     k->device_id = PCM3680i_PCI_DEVICE_ID1;
 241     k->revision = 0x00;
 242     k->class_id = 0x000c09;
 243     k->subsystem_vendor_id = PCM3680i_PCI_VENDOR_ID1;
 244     k->subsystem_id = PCM3680i_PCI_DEVICE_ID1;
 245     dc->desc = "Pcm3680i PCICANx";
 246     dc->vmsd = &vmstate_pcm3680i_pci;
 247     set_bit(DEVICE_CATEGORY_MISC, dc->categories);
 248     dc->reset = pcm3680i_pci_reset;
 249 }
 250
 251 static const TypeInfo pcm3680i_pci_info = {
 252     .name          = TYPE_CAN_PCI_DEV,
 253     .parent        = TYPE_PCI_DEVICE,
 254     .instance_size = sizeof(Pcm3680iPCIState),
 255     .class_init    = pcm3680i_pci_class_init,
 256     .instance_init = pcm3680i_pci_instance_init,
 257     .interfaces = (InterfaceInfo[]) {
 258         { INTERFACE_CONVENTIONAL_PCI_DEVICE },
 259         { },
 260     },
 261 };
 262
 263 static void pcm3680i_pci_register_types(void)
 264 {
 265     type_register_static(&pcm3680i_pci_info);
 266 }
 267
 268 type_init(pcm3680i_pci_register_types)