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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" | |
0b8fa32f | 30 | #include "qemu/module.h" |
db3e6379 DE |
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 "mioe3680_pci" | |
42 | ||
43 | #define MIOe3680_PCI_DEV(obj) \ | |
44 | OBJECT_CHECK(Mioe3680PCIState, (obj), TYPE_CAN_PCI_DEV) | |
45 | ||
46 | /* the PCI device and vendor IDs */ | |
47 | #ifndef MIOe3680_PCI_VENDOR_ID1 | |
48 | #define MIOe3680_PCI_VENDOR_ID1 0x13fe | |
49 | #endif | |
50 | ||
51 | #ifndef MIOe3680_PCI_DEVICE_ID1 | |
52 | #define MIOe3680_PCI_DEVICE_ID1 0xc302 | |
53 | #endif | |
54 | ||
55 | #define MIOe3680_PCI_SJA_COUNT 2 | |
56 | #define MIOe3680_PCI_SJA_RANGE 0x400 | |
57 | ||
58 | #define MIOe3680_PCI_BYTES_PER_SJA 0x80 | |
59 | ||
60 | typedef struct Mioe3680PCIState { | |
61 | /*< private >*/ | |
62 | PCIDevice dev; | |
63 | /*< public >*/ | |
64 | MemoryRegion sja_io[MIOe3680_PCI_SJA_COUNT]; | |
65 | ||
66 | CanSJA1000State sja_state[MIOe3680_PCI_SJA_COUNT]; | |
67 | qemu_irq irq; | |
68 | ||
69 | char *model; /* The model that support, only SJA1000 now. */ | |
70 | CanBusState *canbus[MIOe3680_PCI_SJA_COUNT]; | |
71 | } Mioe3680PCIState; | |
72 | ||
73 | static void mioe3680_pci_reset(DeviceState *dev) | |
74 | { | |
75 | Mioe3680PCIState *d = MIOe3680_PCI_DEV(dev); | |
76 | int i; | |
77 | ||
78 | for (i = 0 ; i < MIOe3680_PCI_SJA_COUNT; i++) { | |
79 | can_sja_hardware_reset(&d->sja_state[i]); | |
80 | } | |
81 | } | |
82 | ||
83 | static uint64_t mioe3680_pci_sja1_io_read(void *opaque, hwaddr addr, | |
84 | unsigned size) | |
85 | { | |
86 | Mioe3680PCIState *d = opaque; | |
87 | CanSJA1000State *s = &d->sja_state[0]; | |
88 | ||
89 | if (addr >= MIOe3680_PCI_BYTES_PER_SJA) { | |
90 | return 0; | |
91 | } | |
92 | ||
93 | return can_sja_mem_read(s, addr >> 2, size); | |
94 | } | |
95 | ||
96 | static void mioe3680_pci_sja1_io_write(void *opaque, hwaddr addr, uint64_t data, | |
97 | unsigned size) | |
98 | { | |
99 | Mioe3680PCIState *d = opaque; | |
100 | CanSJA1000State *s = &d->sja_state[0]; | |
101 | ||
102 | if (addr >= MIOe3680_PCI_BYTES_PER_SJA) { | |
103 | return; | |
104 | } | |
105 | ||
106 | can_sja_mem_write(s, addr >> 2, data, size); | |
107 | } | |
108 | ||
109 | static uint64_t mioe3680_pci_sja2_io_read(void *opaque, hwaddr addr, | |
110 | unsigned size) | |
111 | { | |
112 | Mioe3680PCIState *d = opaque; | |
113 | CanSJA1000State *s = &d->sja_state[1]; | |
114 | ||
115 | if (addr >= MIOe3680_PCI_BYTES_PER_SJA) { | |
116 | return 0; | |
117 | } | |
118 | ||
119 | return can_sja_mem_read(s, addr >> 2, size); | |
120 | } | |
121 | ||
122 | static void mioe3680_pci_sja2_io_write(void *opaque, hwaddr addr, uint64_t data, | |
123 | unsigned size) | |
124 | { | |
125 | Mioe3680PCIState *d = opaque; | |
126 | CanSJA1000State *s = &d->sja_state[1]; | |
127 | ||
128 | if (addr >= MIOe3680_PCI_BYTES_PER_SJA) { | |
129 | return; | |
130 | } | |
131 | ||
132 | can_sja_mem_write(s, addr >> 2, data, size); | |
133 | } | |
134 | ||
135 | static const MemoryRegionOps mioe3680_pci_sja1_io_ops = { | |
136 | .read = mioe3680_pci_sja1_io_read, | |
137 | .write = mioe3680_pci_sja1_io_write, | |
138 | .endianness = DEVICE_LITTLE_ENDIAN, | |
139 | .impl = { | |
140 | .max_access_size = 1, | |
141 | }, | |
142 | }; | |
143 | ||
144 | static const MemoryRegionOps mioe3680_pci_sja2_io_ops = { | |
145 | .read = mioe3680_pci_sja2_io_read, | |
146 | .write = mioe3680_pci_sja2_io_write, | |
147 | .endianness = DEVICE_LITTLE_ENDIAN, | |
148 | .impl = { | |
149 | .max_access_size = 1, | |
150 | }, | |
151 | }; | |
152 | ||
153 | static void mioe3680_pci_realize(PCIDevice *pci_dev, Error **errp) | |
154 | { | |
155 | Mioe3680PCIState *d = MIOe3680_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 < MIOe3680_PCI_SJA_COUNT; i++) { | |
165 | can_sja_init(&d->sja_state[i], d->irq); | |
166 | } | |
167 | ||
168 | for (i = 0 ; i < MIOe3680_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), &mioe3680_pci_sja1_io_ops, | |
176 | d, "mioe3680_pci-sja1", MIOe3680_PCI_SJA_RANGE); | |
177 | memory_region_init_io(&d->sja_io[1], OBJECT(d), &mioe3680_pci_sja2_io_ops, | |
178 | d, "mioe3680_pci-sja2", MIOe3680_PCI_SJA_RANGE); | |
179 | ||
180 | for (i = 0 ; i < MIOe3680_PCI_SJA_COUNT; i++) { | |
181 | pci_register_bar(&d->dev, /*BAR*/ i, PCI_BASE_ADDRESS_SPACE_IO, | |
182 | &d->sja_io[i]); | |
183 | } | |
184 | } | |
185 | ||
186 | static void mioe3680_pci_exit(PCIDevice *pci_dev) | |
187 | { | |
188 | Mioe3680PCIState *d = MIOe3680_PCI_DEV(pci_dev); | |
189 | int i; | |
190 | ||
191 | for (i = 0 ; i < MIOe3680_PCI_SJA_COUNT; i++) { | |
192 | can_sja_disconnect(&d->sja_state[i]); | |
193 | } | |
194 | ||
195 | qemu_free_irq(d->irq); | |
196 | } | |
197 | ||
198 | static const VMStateDescription vmstate_mioe3680_pci = { | |
199 | .name = "mioe3680_pci", | |
200 | .version_id = 1, | |
201 | .minimum_version_id = 1, | |
202 | .minimum_version_id_old = 1, | |
203 | .fields = (VMStateField[]) { | |
204 | VMSTATE_PCI_DEVICE(dev, Mioe3680PCIState), | |
205 | VMSTATE_STRUCT(sja_state[0], Mioe3680PCIState, 0, vmstate_can_sja, | |
206 | CanSJA1000State), | |
207 | VMSTATE_STRUCT(sja_state[1], Mioe3680PCIState, 0, vmstate_can_sja, | |
208 | CanSJA1000State), | |
209 | VMSTATE_END_OF_LIST() | |
210 | } | |
211 | }; | |
212 | ||
213 | static void mioe3680_pci_instance_init(Object *obj) | |
214 | { | |
215 | Mioe3680PCIState *d = MIOe3680_PCI_DEV(obj); | |
216 | ||
217 | object_property_add_link(obj, "canbus0", TYPE_CAN_BUS, | |
218 | (Object **)&d->canbus[0], | |
219 | qdev_prop_allow_set_link_before_realize, | |
220 | 0, &error_abort); | |
221 | object_property_add_link(obj, "canbus1", TYPE_CAN_BUS, | |
222 | (Object **)&d->canbus[1], | |
223 | qdev_prop_allow_set_link_before_realize, | |
224 | 0, &error_abort); | |
225 | } | |
226 | ||
227 | static void mioe3680_pci_class_init(ObjectClass *klass, void *data) | |
228 | { | |
229 | DeviceClass *dc = DEVICE_CLASS(klass); | |
230 | PCIDeviceClass *k = PCI_DEVICE_CLASS(klass); | |
231 | ||
232 | k->realize = mioe3680_pci_realize; | |
233 | k->exit = mioe3680_pci_exit; | |
234 | k->vendor_id = MIOe3680_PCI_VENDOR_ID1; | |
235 | k->device_id = MIOe3680_PCI_DEVICE_ID1; | |
236 | k->revision = 0x00; | |
237 | k->class_id = 0x000c09; | |
238 | k->subsystem_vendor_id = MIOe3680_PCI_VENDOR_ID1; | |
239 | k->subsystem_id = MIOe3680_PCI_DEVICE_ID1; | |
240 | dc->desc = "Mioe3680 PCICANx"; | |
241 | dc->vmsd = &vmstate_mioe3680_pci; | |
242 | set_bit(DEVICE_CATEGORY_MISC, dc->categories); | |
243 | dc->reset = mioe3680_pci_reset; | |
244 | } | |
245 | ||
246 | static const TypeInfo mioe3680_pci_info = { | |
247 | .name = TYPE_CAN_PCI_DEV, | |
248 | .parent = TYPE_PCI_DEVICE, | |
249 | .instance_size = sizeof(Mioe3680PCIState), | |
250 | .class_init = mioe3680_pci_class_init, | |
251 | .instance_init = mioe3680_pci_instance_init, | |
252 | .interfaces = (InterfaceInfo[]) { | |
253 | { INTERFACE_CONVENTIONAL_PCI_DEVICE }, | |
254 | { }, | |
255 | }, | |
256 | }; | |
257 | ||
258 | static void mioe3680_pci_register_types(void) | |
259 | { | |
260 | type_register_static(&mioe3680_pci_info); | |
261 | } | |
262 | ||
263 | type_init(mioe3680_pci_register_types) |