hw/char/serial-pci.c

   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)