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 "hw/char/serial.h" 29 #include "hw/pci/pci.h" 30 #include "qapi/qmp/qerror.h" 31 32 #define PCI_SERIAL_MAX_PORTS 4 33 34 typedef struct PCISerialState { 35 PCIDevice dev; 36 SerialState state; 37 uint8_t prog_if; 38 } PCISerialState; 39 40 typedef struct PCIMultiSerialState { 41 PCIDevice dev; 42 MemoryRegion iobar; 43 uint32_t ports; 44 char *name[PCI_SERIAL_MAX_PORTS]; 45 SerialState state[PCI_SERIAL_MAX_PORTS]; 46 uint32_t level[PCI_SERIAL_MAX_PORTS]; 47 qemu_irq *irqs; 48 uint8_t prog_if; 49 } PCIMultiSerialState; 50 51 static int serial_pci_init(PCIDevice *dev) 52 { 53 PCISerialState *pci = DO_UPCAST(PCISerialState, dev, dev); 54 SerialState *s = &pci->state; 55 Error *err = NULL; 56 57 s->baudbase = 115200; 58 serial_realize_core(s, &err); 59 if (err != NULL) { 60 qerror_report_err(err); 61 error_free(err); 62 return -1; 63 } 64 65 pci->dev.config[PCI_CLASS_PROG] = pci->prog_if; 66 pci->dev.config[PCI_INTERRUPT_PIN] = 0x01; 67 s->irq = pci_allocate_irq(&pci->dev); 68 69 memory_region_init_io(&s->io, OBJECT(pci), &serial_io_ops, s, "serial", 8); 70 pci_register_bar(&pci->dev, 0, PCI_BASE_ADDRESS_SPACE_IO, &s->io); 71 return 0; 72 } 73 74 static void multi_serial_irq_mux(void *opaque, int n, int level) 75 { 76 PCIMultiSerialState *pci = opaque; 77 int i, pending = 0; 78 79 pci->level[n] = level; 80 for (i = 0; i < pci->ports; i++) { 81 if (pci->level[i]) { 82 pending = 1; 83 } 84 } 85 pci_set_irq(&pci->dev, pending); 86 } 87 88 static int multi_serial_pci_init(PCIDevice *dev) 89 { 90 PCIDeviceClass *pc = PCI_DEVICE_GET_CLASS(dev); 91 PCIMultiSerialState *pci = DO_UPCAST(PCIMultiSerialState, dev, dev); 92 SerialState *s; 93 Error *err = NULL; 94 int i; 95 96 switch (pc->device_id) { 97 case 0x0003: 98 pci->ports = 2; 99 break; 100 case 0x0004: 101 pci->ports = 4; 102 break; 103 } 104 assert(pci->ports > 0); 105 assert(pci->ports <= PCI_SERIAL_MAX_PORTS); 106 107 pci->dev.config[PCI_CLASS_PROG] = pci->prog_if; 108 pci->dev.config[PCI_INTERRUPT_PIN] = 0x01; 109 memory_region_init(&pci->iobar, OBJECT(pci), "multiserial", 8 * pci->ports); 110 pci_register_bar(&pci->dev, 0, PCI_BASE_ADDRESS_SPACE_IO, &pci->iobar); 111 pci->irqs = qemu_allocate_irqs(multi_serial_irq_mux, pci, 112 pci->ports); 113 114 for (i = 0; i < pci->ports; i++) { 115 s = pci->state + i; 116 s->baudbase = 115200; 117 serial_realize_core(s, &err); 118 if (err != NULL) { 119 qerror_report_err(err); 120 error_free(err); 121 return -1; 122 } 123 s->irq = pci->irqs[i]; 124 pci->name[i] = g_strdup_printf("uart #%d", i+1); 125 memory_region_init_io(&s->io, OBJECT(pci), &serial_io_ops, s, 126 pci->name[i], 8); 127 memory_region_add_subregion(&pci->iobar, 8 * i, &s->io); 128 } 129 return 0; 130 } 131 132 static void serial_pci_exit(PCIDevice *dev) 133 { 134 PCISerialState *pci = DO_UPCAST(PCISerialState, dev, dev); 135 SerialState *s = &pci->state; 136 137 serial_exit_core(s); 138 memory_region_destroy(&s->io); 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 memory_region_destroy(&s->io); 153 g_free(pci->name[i]); 154 } 155 memory_region_destroy(&pci->iobar); 156 qemu_free_irqs(pci->irqs, pci->ports); 157 } 158 159 static const VMStateDescription vmstate_pci_serial = { 160 .name = "pci-serial", 161 .version_id = 1, 162 .minimum_version_id = 1, 163 .fields = (VMStateField[]) { 164 VMSTATE_PCI_DEVICE(dev, PCISerialState), 165 VMSTATE_STRUCT(state, PCISerialState, 0, vmstate_serial, SerialState), 166 VMSTATE_END_OF_LIST() 167 } 168 }; 169 170 static const VMStateDescription vmstate_pci_multi_serial = { 171 .name = "pci-serial-multi", 172 .version_id = 1, 173 .minimum_version_id = 1, 174 .fields = (VMStateField[]) { 175 VMSTATE_PCI_DEVICE(dev, PCIMultiSerialState), 176 VMSTATE_STRUCT_ARRAY(state, PCIMultiSerialState, PCI_SERIAL_MAX_PORTS, 177 0, vmstate_serial, SerialState), 178 VMSTATE_UINT32_ARRAY(level, PCIMultiSerialState, PCI_SERIAL_MAX_PORTS), 179 VMSTATE_END_OF_LIST() 180 } 181 }; 182 183 static Property serial_pci_properties[] = { 184 DEFINE_PROP_CHR("chardev", PCISerialState, state.chr), 185 DEFINE_PROP_UINT8("prog_if", PCISerialState, prog_if, 0x02), 186 DEFINE_PROP_END_OF_LIST(), 187 }; 188 189 static Property multi_2x_serial_pci_properties[] = { 190 DEFINE_PROP_CHR("chardev1", PCIMultiSerialState, state[0].chr), 191 DEFINE_PROP_CHR("chardev2", PCIMultiSerialState, state[1].chr), 192 DEFINE_PROP_UINT8("prog_if", PCIMultiSerialState, prog_if, 0x02), 193 DEFINE_PROP_END_OF_LIST(), 194 }; 195 196 static Property multi_4x_serial_pci_properties[] = { 197 DEFINE_PROP_CHR("chardev1", PCIMultiSerialState, state[0].chr), 198 DEFINE_PROP_CHR("chardev2", PCIMultiSerialState, state[1].chr), 199 DEFINE_PROP_CHR("chardev3", PCIMultiSerialState, state[2].chr), 200 DEFINE_PROP_CHR("chardev4", PCIMultiSerialState, state[3].chr), 201 DEFINE_PROP_UINT8("prog_if", PCIMultiSerialState, prog_if, 0x02), 202 DEFINE_PROP_END_OF_LIST(), 203 }; 204 205 static void serial_pci_class_initfn(ObjectClass *klass, void *data) 206 { 207 DeviceClass *dc = DEVICE_CLASS(klass); 208 PCIDeviceClass *pc = PCI_DEVICE_CLASS(klass); 209 pc->init = serial_pci_init; 210 pc->exit = serial_pci_exit; 211 pc->vendor_id = PCI_VENDOR_ID_REDHAT; 212 pc->device_id = PCI_DEVICE_ID_REDHAT_SERIAL; 213 pc->revision = 1; 214 pc->class_id = PCI_CLASS_COMMUNICATION_SERIAL; 215 dc->vmsd = &vmstate_pci_serial; 216 dc->props = serial_pci_properties; 217 set_bit(DEVICE_CATEGORY_INPUT, dc->categories); 218 } 219 220 static void multi_2x_serial_pci_class_initfn(ObjectClass *klass, void *data) 221 { 222 DeviceClass *dc = DEVICE_CLASS(klass); 223 PCIDeviceClass *pc = PCI_DEVICE_CLASS(klass); 224 pc->init = multi_serial_pci_init; 225 pc->exit = multi_serial_pci_exit; 226 pc->vendor_id = PCI_VENDOR_ID_REDHAT; 227 pc->device_id = PCI_DEVICE_ID_REDHAT_SERIAL2; 228 pc->revision = 1; 229 pc->class_id = PCI_CLASS_COMMUNICATION_SERIAL; 230 dc->vmsd = &vmstate_pci_multi_serial; 231 dc->props = multi_2x_serial_pci_properties; 232 set_bit(DEVICE_CATEGORY_INPUT, dc->categories); 233 } 234 235 static void multi_4x_serial_pci_class_initfn(ObjectClass *klass, void *data) 236 { 237 DeviceClass *dc = DEVICE_CLASS(klass); 238 PCIDeviceClass *pc = PCI_DEVICE_CLASS(klass); 239 pc->init = multi_serial_pci_init; 240 pc->exit = multi_serial_pci_exit; 241 pc->vendor_id = PCI_VENDOR_ID_REDHAT; 242 pc->device_id = PCI_DEVICE_ID_REDHAT_SERIAL4; 243 pc->revision = 1; 244 pc->class_id = PCI_CLASS_COMMUNICATION_SERIAL; 245 dc->vmsd = &vmstate_pci_multi_serial; 246 dc->props = multi_4x_serial_pci_properties; 247 set_bit(DEVICE_CATEGORY_INPUT, dc->categories); 248 } 249 250 static const TypeInfo serial_pci_info = { 251 .name = "pci-serial", 252 .parent = TYPE_PCI_DEVICE, 253 .instance_size = sizeof(PCISerialState), 254 .class_init = serial_pci_class_initfn, 255 }; 256 257 static const TypeInfo multi_2x_serial_pci_info = { 258 .name = "pci-serial-2x", 259 .parent = TYPE_PCI_DEVICE, 260 .instance_size = sizeof(PCIMultiSerialState), 261 .class_init = multi_2x_serial_pci_class_initfn, 262 }; 263 264 static const TypeInfo multi_4x_serial_pci_info = { 265 .name = "pci-serial-4x", 266 .parent = TYPE_PCI_DEVICE, 267 .instance_size = sizeof(PCIMultiSerialState), 268 .class_init = multi_4x_serial_pci_class_initfn, 269 }; 270 271 static void serial_pci_register_types(void) 272 { 273 type_register_static(&serial_pci_info); 274 type_register_static(&multi_2x_serial_pci_info); 275 type_register_static(&multi_4x_serial_pci_info); 276 } 277 278 type_init(serial_pci_register_types) 279