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/hw.h" 36 #include "hw/pci/pci.h" 37 #include "net/can_emu.h" 38 39 #include "can_sja1000.h" 40 41 #define TYPE_CAN_PCI_DEV "pcm3680_pci" 42 43 #define PCM3680i_PCI_DEV(obj) \ 44 OBJECT_CHECK(Pcm3680iPCIState, (obj), TYPE_CAN_PCI_DEV) 45 46 /* the PCI device and vendor IDs */ 47 #ifndef PCM3680i_PCI_VENDOR_ID1 48 #define PCM3680i_PCI_VENDOR_ID1 0x13fe 49 #endif 50 51 #ifndef PCM3680i_PCI_DEVICE_ID1 52 #define PCM3680i_PCI_DEVICE_ID1 0xc002 53 #endif 54 55 #define PCM3680i_PCI_SJA_COUNT 2 56 #define PCM3680i_PCI_SJA_RANGE 0x100 57 58 #define PCM3680i_PCI_BYTES_PER_SJA 0x20 59 60 typedef struct Pcm3680iPCIState { 61 /*< private >*/ 62 PCIDevice dev; 63 /*< public >*/ 64 MemoryRegion sja_io[PCM3680i_PCI_SJA_COUNT]; 65 66 CanSJA1000State sja_state[PCM3680i_PCI_SJA_COUNT]; 67 qemu_irq irq; 68 69 char *model; /* The model that support, only SJA1000 now. */ 70 CanBusState *canbus[PCM3680i_PCI_SJA_COUNT]; 71 } Pcm3680iPCIState; 72 73 static void pcm3680i_pci_reset(DeviceState *dev) 74 { 75 Pcm3680iPCIState *d = PCM3680i_PCI_DEV(dev); 76 int i; 77 78 for (i = 0; i < PCM3680i_PCI_SJA_COUNT; i++) { 79 can_sja_hardware_reset(&d->sja_state[i]); 80 } 81 } 82 83 static uint64_t pcm3680i_pci_sja1_io_read(void *opaque, hwaddr addr, 84 unsigned size) 85 { 86 Pcm3680iPCIState *d = opaque; 87 CanSJA1000State *s = &d->sja_state[0]; 88 89 if (addr >= PCM3680i_PCI_BYTES_PER_SJA) { 90 return 0; 91 } 92 93 return can_sja_mem_read(s, addr, size); 94 } 95 96 static void pcm3680i_pci_sja1_io_write(void *opaque, hwaddr addr, 97 uint64_t data, unsigned size) 98 { 99 Pcm3680iPCIState *d = opaque; 100 CanSJA1000State *s = &d->sja_state[0]; 101 102 if (addr >= PCM3680i_PCI_BYTES_PER_SJA) { 103 return; 104 } 105 106 can_sja_mem_write(s, addr, data, size); 107 } 108 109 static uint64_t pcm3680i_pci_sja2_io_read(void *opaque, hwaddr addr, 110 unsigned size) 111 { 112 Pcm3680iPCIState *d = opaque; 113 CanSJA1000State *s = &d->sja_state[1]; 114 115 if (addr >= PCM3680i_PCI_BYTES_PER_SJA) { 116 return 0; 117 } 118 119 return can_sja_mem_read(s, addr, size); 120 } 121 122 static void pcm3680i_pci_sja2_io_write(void *opaque, hwaddr addr, uint64_t data, 123 unsigned size) 124 { 125 Pcm3680iPCIState *d = opaque; 126 CanSJA1000State *s = &d->sja_state[1]; 127 128 if (addr >= PCM3680i_PCI_BYTES_PER_SJA) { 129 return; 130 } 131 132 can_sja_mem_write(s, addr, data, size); 133 } 134 135 static const MemoryRegionOps pcm3680i_pci_sja1_io_ops = { 136 .read = pcm3680i_pci_sja1_io_read, 137 .write = pcm3680i_pci_sja1_io_write, 138 .endianness = DEVICE_LITTLE_ENDIAN, 139 .impl = { 140 .max_access_size = 1, 141 }, 142 }; 143 144 static const MemoryRegionOps pcm3680i_pci_sja2_io_ops = { 145 .read = pcm3680i_pci_sja2_io_read, 146 .write = pcm3680i_pci_sja2_io_write, 147 .endianness = DEVICE_LITTLE_ENDIAN, 148 .impl = { 149 .max_access_size = 1, 150 }, 151 }; 152 153 static void pcm3680i_pci_realize(PCIDevice *pci_dev, Error **errp) 154 { 155 Pcm3680iPCIState *d = PCM3680i_PCI_DEV(pci_dev); 156 uint8_t *pci_conf; 157 int i; 158 159 pci_conf = pci_dev->config; 160 pci_conf[PCI_INTERRUPT_PIN] = 0x01; /* interrupt pin A */ 161 162 d->irq = pci_allocate_irq(&d->dev); 163 164 for (i = 0; i < PCM3680i_PCI_SJA_COUNT; i++) { 165 can_sja_init(&d->sja_state[i], d->irq); 166 } 167 168 for (i = 0; i < PCM3680i_PCI_SJA_COUNT; i++) { 169 if (can_sja_connect_to_bus(&d->sja_state[i], d->canbus[i]) < 0) { 170 error_setg(errp, "can_sja_connect_to_bus failed"); 171 return; 172 } 173 } 174 175 memory_region_init_io(&d->sja_io[0], OBJECT(d), &pcm3680i_pci_sja1_io_ops, 176 d, "pcm3680i_pci-sja1", PCM3680i_PCI_SJA_RANGE); 177 178 memory_region_init_io(&d->sja_io[1], OBJECT(d), &pcm3680i_pci_sja2_io_ops, 179 d, "pcm3680i_pci-sja2", PCM3680i_PCI_SJA_RANGE); 180 181 for (i = 0; i < PCM3680i_PCI_SJA_COUNT; i++) { 182 pci_register_bar(&d->dev, /*BAR*/ i, PCI_BASE_ADDRESS_SPACE_IO, 183 &d->sja_io[i]); 184 } 185 } 186 187 static void pcm3680i_pci_exit(PCIDevice *pci_dev) 188 { 189 Pcm3680iPCIState *d = PCM3680i_PCI_DEV(pci_dev); 190 int i; 191 192 for (i = 0; i < PCM3680i_PCI_SJA_COUNT; i++) { 193 can_sja_disconnect(&d->sja_state[i]); 194 } 195 196 qemu_free_irq(d->irq); 197 } 198 199 static const VMStateDescription vmstate_pcm3680i_pci = { 200 .name = "pcm3680i_pci", 201 .version_id = 1, 202 .minimum_version_id = 1, 203 .minimum_version_id_old = 1, 204 .fields = (VMStateField[]) { 205 VMSTATE_PCI_DEVICE(dev, Pcm3680iPCIState), 206 VMSTATE_STRUCT(sja_state[0], Pcm3680iPCIState, 0, 207 vmstate_can_sja, CanSJA1000State), 208 VMSTATE_STRUCT(sja_state[1], Pcm3680iPCIState, 0, 209 vmstate_can_sja, CanSJA1000State), 210 VMSTATE_END_OF_LIST() 211 } 212 }; 213 214 static void pcm3680i_pci_instance_init(Object *obj) 215 { 216 Pcm3680iPCIState *d = PCM3680i_PCI_DEV(obj); 217 218 object_property_add_link(obj, "canbus0", TYPE_CAN_BUS, 219 (Object **)&d->canbus[0], 220 qdev_prop_allow_set_link_before_realize, 221 0, &error_abort); 222 object_property_add_link(obj, "canbus1", TYPE_CAN_BUS, 223 (Object **)&d->canbus[1], 224 qdev_prop_allow_set_link_before_realize, 225 0, &error_abort); 226 } 227 228 static void pcm3680i_pci_class_init(ObjectClass *klass, void *data) 229 { 230 DeviceClass *dc = DEVICE_CLASS(klass); 231 PCIDeviceClass *k = PCI_DEVICE_CLASS(klass); 232 233 k->realize = pcm3680i_pci_realize; 234 k->exit = pcm3680i_pci_exit; 235 k->vendor_id = PCM3680i_PCI_VENDOR_ID1; 236 k->device_id = PCM3680i_PCI_DEVICE_ID1; 237 k->revision = 0x00; 238 k->class_id = 0x000c09; 239 k->subsystem_vendor_id = PCM3680i_PCI_VENDOR_ID1; 240 k->subsystem_id = PCM3680i_PCI_DEVICE_ID1; 241 dc->desc = "Pcm3680i PCICANx"; 242 dc->vmsd = &vmstate_pcm3680i_pci; 243 set_bit(DEVICE_CATEGORY_MISC, dc->categories); 244 dc->reset = pcm3680i_pci_reset; 245 } 246 247 static const TypeInfo pcm3680i_pci_info = { 248 .name = TYPE_CAN_PCI_DEV, 249 .parent = TYPE_PCI_DEVICE, 250 .instance_size = sizeof(Pcm3680iPCIState), 251 .class_init = pcm3680i_pci_class_init, 252 .instance_init = pcm3680i_pci_instance_init, 253 .interfaces = (InterfaceInfo[]) { 254 { INTERFACE_CONVENTIONAL_PCI_DEVICE }, 255 { }, 256 }, 257 }; 258 259 static void pcm3680i_pci_register_types(void) 260 { 261 type_register_static(&pcm3680i_pci_info); 262 } 263 264 type_init(pcm3680i_pci_register_types) 265