1 /* 2 * QEMU 16550A UART emulation 3 * 4 * Copyright (c) 2003-2004 Fabrice Bellard 5 * Copyright (c) 2008 Citrix Systems, Inc. 6 * 7 * Permission is hereby granted, free of charge, to any person obtaining a copy 8 * of this software and associated documentation files (the "Software"), to deal 9 * in the Software without restriction, including without limitation the rights 10 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 11 * copies of the Software, and to permit persons to whom the Software is 12 * furnished to do so, subject to the following conditions: 13 * 14 * The above copyright notice and this permission notice shall be included in 15 * all copies or substantial portions of the Software. 16 * 17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 20 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 21 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 22 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 23 * THE SOFTWARE. 24 */ 25 26 /* see docs/specs/pci-serial.txt */ 27 28 #include "qemu/osdep.h" 29 #include "qapi/error.h" 30 #include "hw/char/serial.h" 31 #include "hw/pci/pci.h" 32 33 #define PCI_SERIAL_MAX_PORTS 4 34 35 typedef struct PCISerialState { 36 PCIDevice dev; 37 SerialState state; 38 uint8_t prog_if; 39 } PCISerialState; 40 41 typedef struct PCIMultiSerialState { 42 PCIDevice dev; 43 MemoryRegion iobar; 44 uint32_t ports; 45 char *name[PCI_SERIAL_MAX_PORTS]; 46 SerialState state[PCI_SERIAL_MAX_PORTS]; 47 uint32_t level[PCI_SERIAL_MAX_PORTS]; 48 qemu_irq *irqs; 49 uint8_t prog_if; 50 } PCIMultiSerialState; 51 52 static void multi_serial_pci_exit(PCIDevice *dev); 53 54 static void serial_pci_realize(PCIDevice *dev, Error **errp) 55 { 56 PCISerialState *pci = DO_UPCAST(PCISerialState, dev, dev); 57 SerialState *s = &pci->state; 58 Error *err = NULL; 59 60 s->baudbase = 115200; 61 serial_realize_core(s, &err); 62 if (err != NULL) { 63 error_propagate(errp, err); 64 return; 65 } 66 67 pci->dev.config[PCI_CLASS_PROG] = pci->prog_if; 68 pci->dev.config[PCI_INTERRUPT_PIN] = 0x01; 69 s->irq = pci_allocate_irq(&pci->dev); 70 71 memory_region_init_io(&s->io, OBJECT(pci), &serial_io_ops, s, "serial", 8); 72 pci_register_bar(&pci->dev, 0, PCI_BASE_ADDRESS_SPACE_IO, &s->io); 73 } 74 75 static void multi_serial_irq_mux(void *opaque, int n, int level) 76 { 77 PCIMultiSerialState *pci = opaque; 78 int i, pending = 0; 79 80 pci->level[n] = level; 81 for (i = 0; i < pci->ports; i++) { 82 if (pci->level[i]) { 83 pending = 1; 84 } 85 } 86 pci_set_irq(&pci->dev, pending); 87 } 88 89 static void multi_serial_pci_realize(PCIDevice *dev, Error **errp) 90 { 91 PCIDeviceClass *pc = PCI_DEVICE_GET_CLASS(dev); 92 PCIMultiSerialState *pci = DO_UPCAST(PCIMultiSerialState, dev, dev); 93 SerialState *s; 94 Error *err = NULL; 95 int i, nr_ports = 0; 96 97 switch (pc->device_id) { 98 case 0x0003: 99 nr_ports = 2; 100 break; 101 case 0x0004: 102 nr_ports = 4; 103 break; 104 } 105 assert(nr_ports > 0); 106 assert(nr_ports <= PCI_SERIAL_MAX_PORTS); 107 108 pci->dev.config[PCI_CLASS_PROG] = pci->prog_if; 109 pci->dev.config[PCI_INTERRUPT_PIN] = 0x01; 110 memory_region_init(&pci->iobar, OBJECT(pci), "multiserial", 8 * nr_ports); 111 pci_register_bar(&pci->dev, 0, PCI_BASE_ADDRESS_SPACE_IO, &pci->iobar); 112 pci->irqs = qemu_allocate_irqs(multi_serial_irq_mux, pci, 113 nr_ports); 114 115 for (i = 0; i < nr_ports; i++) { 116 s = pci->state + i; 117 s->baudbase = 115200; 118 serial_realize_core(s, &err); 119 if (err != NULL) { 120 error_propagate(errp, err); 121 multi_serial_pci_exit(dev); 122 return; 123 } 124 s->irq = pci->irqs[i]; 125 pci->name[i] = g_strdup_printf("uart #%d", i+1); 126 memory_region_init_io(&s->io, OBJECT(pci), &serial_io_ops, s, 127 pci->name[i], 8); 128 memory_region_add_subregion(&pci->iobar, 8 * i, &s->io); 129 pci->ports++; 130 } 131 } 132 133 static void serial_pci_exit(PCIDevice *dev) 134 { 135 PCISerialState *pci = DO_UPCAST(PCISerialState, dev, dev); 136 SerialState *s = &pci->state; 137 138 serial_exit_core(s); 139 qemu_free_irq(s->irq); 140 } 141 142 static void multi_serial_pci_exit(PCIDevice *dev) 143 { 144 PCIMultiSerialState *pci = DO_UPCAST(PCIMultiSerialState, dev, dev); 145 SerialState *s; 146 int i; 147 148 for (i = 0; i < pci->ports; i++) { 149 s = pci->state + i; 150 serial_exit_core(s); 151 memory_region_del_subregion(&pci->iobar, &s->io); 152 g_free(pci->name[i]); 153 } 154 qemu_free_irqs(pci->irqs, pci->ports); 155 } 156 157 static const VMStateDescription vmstate_pci_serial = { 158 .name = "pci-serial", 159 .version_id = 1, 160 .minimum_version_id = 1, 161 .fields = (VMStateField[]) { 162 VMSTATE_PCI_DEVICE(dev, PCISerialState), 163 VMSTATE_STRUCT(state, PCISerialState, 0, vmstate_serial, SerialState), 164 VMSTATE_END_OF_LIST() 165 } 166 }; 167 168 static const VMStateDescription vmstate_pci_multi_serial = { 169 .name = "pci-serial-multi", 170 .version_id = 1, 171 .minimum_version_id = 1, 172 .fields = (VMStateField[]) { 173 VMSTATE_PCI_DEVICE(dev, PCIMultiSerialState), 174 VMSTATE_STRUCT_ARRAY(state, PCIMultiSerialState, PCI_SERIAL_MAX_PORTS, 175 0, vmstate_serial, SerialState), 176 VMSTATE_UINT32_ARRAY(level, PCIMultiSerialState, PCI_SERIAL_MAX_PORTS), 177 VMSTATE_END_OF_LIST() 178 } 179 }; 180 181 static Property serial_pci_properties[] = { 182 DEFINE_PROP_CHR("chardev", PCISerialState, state.chr), 183 DEFINE_PROP_UINT8("prog_if", PCISerialState, prog_if, 0x02), 184 DEFINE_PROP_END_OF_LIST(), 185 }; 186 187 static Property multi_2x_serial_pci_properties[] = { 188 DEFINE_PROP_CHR("chardev1", PCIMultiSerialState, state[0].chr), 189 DEFINE_PROP_CHR("chardev2", PCIMultiSerialState, state[1].chr), 190 DEFINE_PROP_UINT8("prog_if", PCIMultiSerialState, prog_if, 0x02), 191 DEFINE_PROP_END_OF_LIST(), 192 }; 193 194 static Property multi_4x_serial_pci_properties[] = { 195 DEFINE_PROP_CHR("chardev1", PCIMultiSerialState, state[0].chr), 196 DEFINE_PROP_CHR("chardev2", PCIMultiSerialState, state[1].chr), 197 DEFINE_PROP_CHR("chardev3", PCIMultiSerialState, state[2].chr), 198 DEFINE_PROP_CHR("chardev4", PCIMultiSerialState, state[3].chr), 199 DEFINE_PROP_UINT8("prog_if", PCIMultiSerialState, prog_if, 0x02), 200 DEFINE_PROP_END_OF_LIST(), 201 }; 202 203 static void serial_pci_class_initfn(ObjectClass *klass, void *data) 204 { 205 DeviceClass *dc = DEVICE_CLASS(klass); 206 PCIDeviceClass *pc = PCI_DEVICE_CLASS(klass); 207 pc->realize = serial_pci_realize; 208 pc->exit = serial_pci_exit; 209 pc->vendor_id = PCI_VENDOR_ID_REDHAT; 210 pc->device_id = PCI_DEVICE_ID_REDHAT_SERIAL; 211 pc->revision = 1; 212 pc->class_id = PCI_CLASS_COMMUNICATION_SERIAL; 213 dc->vmsd = &vmstate_pci_serial; 214 dc->props = serial_pci_properties; 215 set_bit(DEVICE_CATEGORY_INPUT, dc->categories); 216 } 217 218 static void multi_2x_serial_pci_class_initfn(ObjectClass *klass, void *data) 219 { 220 DeviceClass *dc = DEVICE_CLASS(klass); 221 PCIDeviceClass *pc = PCI_DEVICE_CLASS(klass); 222 pc->realize = multi_serial_pci_realize; 223 pc->exit = multi_serial_pci_exit; 224 pc->vendor_id = PCI_VENDOR_ID_REDHAT; 225 pc->device_id = PCI_DEVICE_ID_REDHAT_SERIAL2; 226 pc->revision = 1; 227 pc->class_id = PCI_CLASS_COMMUNICATION_SERIAL; 228 dc->vmsd = &vmstate_pci_multi_serial; 229 dc->props = multi_2x_serial_pci_properties; 230 set_bit(DEVICE_CATEGORY_INPUT, dc->categories); 231 } 232 233 static void multi_4x_serial_pci_class_initfn(ObjectClass *klass, void *data) 234 { 235 DeviceClass *dc = DEVICE_CLASS(klass); 236 PCIDeviceClass *pc = PCI_DEVICE_CLASS(klass); 237 pc->realize = multi_serial_pci_realize; 238 pc->exit = multi_serial_pci_exit; 239 pc->vendor_id = PCI_VENDOR_ID_REDHAT; 240 pc->device_id = PCI_DEVICE_ID_REDHAT_SERIAL4; 241 pc->revision = 1; 242 pc->class_id = PCI_CLASS_COMMUNICATION_SERIAL; 243 dc->vmsd = &vmstate_pci_multi_serial; 244 dc->props = multi_4x_serial_pci_properties; 245 set_bit(DEVICE_CATEGORY_INPUT, dc->categories); 246 } 247 248 static const TypeInfo serial_pci_info = { 249 .name = "pci-serial", 250 .parent = TYPE_PCI_DEVICE, 251 .instance_size = sizeof(PCISerialState), 252 .class_init = serial_pci_class_initfn, 253 }; 254 255 static const TypeInfo multi_2x_serial_pci_info = { 256 .name = "pci-serial-2x", 257 .parent = TYPE_PCI_DEVICE, 258 .instance_size = sizeof(PCIMultiSerialState), 259 .class_init = multi_2x_serial_pci_class_initfn, 260 }; 261 262 static const TypeInfo multi_4x_serial_pci_info = { 263 .name = "pci-serial-4x", 264 .parent = TYPE_PCI_DEVICE, 265 .instance_size = sizeof(PCIMultiSerialState), 266 .class_init = multi_4x_serial_pci_class_initfn, 267 }; 268 269 static void serial_pci_register_types(void) 270 { 271 type_register_static(&serial_pci_info); 272 type_register_static(&multi_2x_serial_pci_info); 273 type_register_static(&multi_4x_serial_pci_info); 274 } 275 276 type_init(serial_pci_register_types) 277