hw/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 "serial.h"
  29 #include "pci.h"
  30
  31 #define PCI_SERIAL_MAX_PORTS 4
  32
  33 typedef struct PCISerialState {
  34     PCIDevice dev;
  35     SerialState state;
  36 } PCISerialState;
  37
  38 typedef struct PCIMultiSerialState {
  39     PCIDevice    dev;
  40     MemoryRegion iobar;
  41     uint32_t     ports;
  42     char         *name[PCI_SERIAL_MAX_PORTS];
  43     SerialState  state[PCI_SERIAL_MAX_PORTS];
  44     uint32_t     level[PCI_SERIAL_MAX_PORTS];
  45     qemu_irq     *irqs;
  46 } PCIMultiSerialState;
  47
  48 static int serial_pci_init(PCIDevice *dev)
  49 {
  50     PCISerialState *pci = DO_UPCAST(PCISerialState, dev, dev);
  51     SerialState *s = &pci->state;
  52
  53     s->baudbase = 115200;
  54     serial_init_core(s);
  55
  56     pci->dev.config[PCI_INTERRUPT_PIN] = 0x01;
  57     s->irq = pci->dev.irq[0];
  58
  59     memory_region_init_io(&s->io, &serial_io_ops, s, "serial", 8);
  60     pci_register_bar(&pci->dev, 0, PCI_BASE_ADDRESS_SPACE_IO, &s->io);
  61     return 0;
  62 }
  63
  64 static void multi_serial_irq_mux(void *opaque, int n, int level)
  65 {
  66     PCIMultiSerialState *pci = opaque;
  67     int i, pending = 0;
  68
  69     pci->level[n] = level;
  70     for (i = 0; i < pci->ports; i++) {
  71         if (pci->level[i]) {
  72             pending = 1;
  73         }
  74     }
  75     qemu_set_irq(pci->dev.irq[0], pending);
  76 }
  77
  78 static int multi_serial_pci_init(PCIDevice *dev)
  79 {
  80     PCIDeviceClass *pc = PCI_DEVICE_GET_CLASS(dev);
  81     PCIMultiSerialState *pci = DO_UPCAST(PCIMultiSerialState, dev, dev);
  82     SerialState *s;
  83     int i;
  84
  85     switch (pc->device_id) {
  86     case 0x0003:
  87         pci->ports = 2;
  88         break;
  89     case 0x0004:
  90         pci->ports = 4;
  91         break;
  92     }
  93     assert(pci->ports > 0);
  94     assert(pci->ports <= PCI_SERIAL_MAX_PORTS);
  95
  96     pci->dev.config[PCI_INTERRUPT_PIN] = 0x01;
  97     memory_region_init(&pci->iobar, "multiserial", 8 * pci->ports);
  98     pci_register_bar(&pci->dev, 0, PCI_BASE_ADDRESS_SPACE_IO, &pci->iobar);
  99     pci->irqs = qemu_allocate_irqs(multi_serial_irq_mux, pci,
 100                                    pci->ports);
 101
 102     for (i = 0; i < pci->ports; i++) {
 103         s = pci->state + i;
 104         s->baudbase = 115200;
 105         serial_init_core(s);
 106         s->irq = pci->irqs[i];
 107         pci->name[i] = g_strdup_printf("uart #%d", i+1);
 108         memory_region_init_io(&s->io, &serial_io_ops, s, pci->name[i], 8);
 109         memory_region_add_subregion(&pci->iobar, 8 * i, &s->io);
 110     }
 111     return 0;
 112 }
 113
 114 static void serial_pci_exit(PCIDevice *dev)
 115 {
 116     PCISerialState *pci = DO_UPCAST(PCISerialState, dev, dev);
 117     SerialState *s = &pci->state;
 118
 119     serial_exit_core(s);
 120     memory_region_destroy(&s->io);
 121 }
 122
 123 static void multi_serial_pci_exit(PCIDevice *dev)
 124 {
 125     PCIMultiSerialState *pci = DO_UPCAST(PCIMultiSerialState, dev, dev);
 126     SerialState *s;
 127     int i;
 128
 129     for (i = 0; i < pci->ports; i++) {
 130         s = pci->state + i;
 131         serial_exit_core(s);
 132         memory_region_destroy(&s->io);
 133         g_free(pci->name[i]);
 134     }
 135     memory_region_destroy(&pci->iobar);
 136     qemu_free_irqs(pci->irqs);
 137 }
 138
 139 static const VMStateDescription vmstate_pci_serial = {
 140     .name = "pci-serial",
 141     .version_id = 1,
 142     .minimum_version_id = 1,
 143     .fields      = (VMStateField[]) {
 144         VMSTATE_PCI_DEVICE(dev, PCISerialState),
 145         VMSTATE_STRUCT(state, PCISerialState, 0, vmstate_serial, SerialState),
 146         VMSTATE_END_OF_LIST()
 147     }
 148 };
 149
 150 static const VMStateDescription vmstate_pci_multi_serial = {
 151     .name = "pci-serial-multi",
 152     .version_id = 1,
 153     .minimum_version_id = 1,
 154     .fields      = (VMStateField[]) {
 155         VMSTATE_PCI_DEVICE(dev, PCIMultiSerialState),
 156         VMSTATE_STRUCT_ARRAY(state, PCIMultiSerialState, PCI_SERIAL_MAX_PORTS,
 157                              0, vmstate_serial, SerialState),
 158         VMSTATE_UINT32_ARRAY(level, PCIMultiSerialState, PCI_SERIAL_MAX_PORTS),
 159         VMSTATE_END_OF_LIST()
 160     }
 161 };
 162
 163 static Property serial_pci_properties[] = {
 164     DEFINE_PROP_CHR("chardev",  PCISerialState, state.chr),
 165     DEFINE_PROP_END_OF_LIST(),
 166 };
 167
 168 static Property multi_2x_serial_pci_properties[] = {
 169     DEFINE_PROP_CHR("chardev1",  PCIMultiSerialState, state[0].chr),
 170     DEFINE_PROP_CHR("chardev2",  PCIMultiSerialState, state[1].chr),
 171     DEFINE_PROP_END_OF_LIST(),
 172 };
 173
 174 static Property multi_4x_serial_pci_properties[] = {
 175     DEFINE_PROP_CHR("chardev1",  PCIMultiSerialState, state[0].chr),
 176     DEFINE_PROP_CHR("chardev2",  PCIMultiSerialState, state[1].chr),
 177     DEFINE_PROP_CHR("chardev3",  PCIMultiSerialState, state[2].chr),
 178     DEFINE_PROP_CHR("chardev4",  PCIMultiSerialState, state[3].chr),
 179     DEFINE_PROP_END_OF_LIST(),
 180 };
 181
 182 static void serial_pci_class_initfn(ObjectClass *klass, void *data)
 183 {
 184     DeviceClass *dc = DEVICE_CLASS(klass);
 185     PCIDeviceClass *pc = PCI_DEVICE_CLASS(klass);
 186     pc->init = serial_pci_init;
 187     pc->exit = serial_pci_exit;
 188     pc->vendor_id = 0x1b36; /* Red Hat */
 189     pc->device_id = 0x0002;
 190     pc->revision = 1;
 191     pc->class_id = PCI_CLASS_COMMUNICATION_SERIAL;
 192     dc->vmsd = &vmstate_pci_serial;
 193     dc->props = serial_pci_properties;
 194 }
 195
 196 static void multi_2x_serial_pci_class_initfn(ObjectClass *klass, void *data)
 197 {
 198     DeviceClass *dc = DEVICE_CLASS(klass);
 199     PCIDeviceClass *pc = PCI_DEVICE_CLASS(klass);
 200     pc->init = multi_serial_pci_init;
 201     pc->exit = multi_serial_pci_exit;
 202     pc->vendor_id = 0x1b36; /* Red Hat */
 203     pc->device_id = 0x0003;
 204     pc->revision = 1;
 205     pc->class_id = PCI_CLASS_COMMUNICATION_SERIAL;
 206     dc->vmsd = &vmstate_pci_multi_serial;
 207     dc->props = multi_2x_serial_pci_properties;
 208 }
 209
 210 static void multi_4x_serial_pci_class_initfn(ObjectClass *klass, void *data)
 211 {
 212     DeviceClass *dc = DEVICE_CLASS(klass);
 213     PCIDeviceClass *pc = PCI_DEVICE_CLASS(klass);
 214     pc->init = multi_serial_pci_init;
 215     pc->exit = multi_serial_pci_exit;
 216     pc->vendor_id = 0x1b36; /* Red Hat */
 217     pc->device_id = 0x0004;
 218     pc->revision = 1;
 219     pc->class_id = PCI_CLASS_COMMUNICATION_SERIAL;
 220     dc->vmsd = &vmstate_pci_multi_serial;
 221     dc->props = multi_4x_serial_pci_properties;
 222 }
 223
 224 static TypeInfo serial_pci_info = {
 225     .name          = "pci-serial",
 226     .parent        = TYPE_PCI_DEVICE,
 227     .instance_size = sizeof(PCISerialState),
 228     .class_init    = serial_pci_class_initfn,
 229 };
 230
 231 static TypeInfo multi_2x_serial_pci_info = {
 232     .name          = "pci-serial-2x",
 233     .parent        = TYPE_PCI_DEVICE,
 234     .instance_size = sizeof(PCIMultiSerialState),
 235     .class_init    = multi_2x_serial_pci_class_initfn,
 236 };
 237
 238 static TypeInfo multi_4x_serial_pci_info = {
 239     .name          = "pci-serial-4x",
 240     .parent        = TYPE_PCI_DEVICE,
 241     .instance_size = sizeof(PCIMultiSerialState),
 242     .class_init    = multi_4x_serial_pci_class_initfn,
 243 };
 244
 245 static void serial_pci_register_types(void)
 246 {
 247     type_register_static(&serial_pci_info);
 248     type_register_static(&multi_2x_serial_pci_info);
 249     type_register_static(&multi_4x_serial_pci_info);
 250 }
 251
 252 type_init(serial_pci_register_types)