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 "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 } PCISerialState;
  38
  39 typedef struct PCIMultiSerialState {
  40     PCIDevice    dev;
  41     MemoryRegion iobar;
  42     uint32_t     ports;
  43     char         *name[PCI_SERIAL_MAX_PORTS];
  44     SerialState  state[PCI_SERIAL_MAX_PORTS];
  45     uint32_t     level[PCI_SERIAL_MAX_PORTS];
  46     qemu_irq     *irqs;
  47 } PCIMultiSerialState;
  48
  49 static int serial_pci_init(PCIDevice *dev)
  50 {
  51     PCISerialState *pci = DO_UPCAST(PCISerialState, dev, dev);
  52     SerialState *s = &pci->state;
  53     Error *err = NULL;
  54
  55     s->baudbase = 115200;
  56     serial_realize_core(s, &err);
  57     if (err != NULL) {
  58         qerror_report_err(err);
  59         error_free(err);
  60         return -1;
  61     }
  62
  63     pci->dev.config[PCI_INTERRUPT_PIN] = 0x01;
  64     s->irq = pci->dev.irq[0];
  65
  66     memory_region_init_io(&s->io, OBJECT(pci), &serial_io_ops, s, "serial", 8);
  67     pci_register_bar(&pci->dev, 0, PCI_BASE_ADDRESS_SPACE_IO, &s->io);
  68     return 0;
  69 }
  70
  71 static void multi_serial_irq_mux(void *opaque, int n, int level)
  72 {
  73     PCIMultiSerialState *pci = opaque;
  74     int i, pending = 0;
  75
  76     pci->level[n] = level;
  77     for (i = 0; i < pci->ports; i++) {
  78         if (pci->level[i]) {
  79             pending = 1;
  80         }
  81     }
  82     qemu_set_irq(pci->dev.irq[0], pending);
  83 }
  84
  85 static int multi_serial_pci_init(PCIDevice *dev)
  86 {
  87     PCIDeviceClass *pc = PCI_DEVICE_GET_CLASS(dev);
  88     PCIMultiSerialState *pci = DO_UPCAST(PCIMultiSerialState, dev, dev);
  89     SerialState *s;
  90     Error *err = NULL;
  91     int i;
  92
  93     switch (pc->device_id) {
  94     case 0x0003:
  95         pci->ports = 2;
  96         break;
  97     case 0x0004:
  98         pci->ports = 4;
  99         break;
 100     }
 101     assert(pci->ports > 0);
 102     assert(pci->ports <= PCI_SERIAL_MAX_PORTS);
 103
 104     pci->dev.config[PCI_INTERRUPT_PIN] = 0x01;
 105     memory_region_init(&pci->iobar, OBJECT(pci), "multiserial", 8 * pci->ports);
 106     pci_register_bar(&pci->dev, 0, PCI_BASE_ADDRESS_SPACE_IO, &pci->iobar);
 107     pci->irqs = qemu_allocate_irqs(multi_serial_irq_mux, pci,
 108                                    pci->ports);
 109
 110     for (i = 0; i < pci->ports; i++) {
 111         s = pci->state + i;
 112         s->baudbase = 115200;
 113         serial_realize_core(s, &err);
 114         if (err != NULL) {
 115             qerror_report_err(err);
 116             error_free(err);
 117             return -1;
 118         }
 119         s->irq = pci->irqs[i];
 120         pci->name[i] = g_strdup_printf("uart #%d", i+1);
 121         memory_region_init_io(&s->io, OBJECT(pci), &serial_io_ops, s,
 122                               pci->name[i], 8);
 123         memory_region_add_subregion(&pci->iobar, 8 * i, &s->io);
 124     }
 125     return 0;
 126 }
 127
 128 static void serial_pci_exit(PCIDevice *dev)
 129 {
 130     PCISerialState *pci = DO_UPCAST(PCISerialState, dev, dev);
 131     SerialState *s = &pci->state;
 132
 133     serial_exit_core(s);
 134     memory_region_destroy(&s->io);
 135 }
 136
 137 static void multi_serial_pci_exit(PCIDevice *dev)
 138 {
 139     PCIMultiSerialState *pci = DO_UPCAST(PCIMultiSerialState, dev, dev);
 140     SerialState *s;
 141     int i;
 142
 143     for (i = 0; i < pci->ports; i++) {
 144         s = pci->state + i;
 145         serial_exit_core(s);
 146         memory_region_destroy(&s->io);
 147         g_free(pci->name[i]);
 148     }
 149     memory_region_destroy(&pci->iobar);
 150     qemu_free_irqs(pci->irqs);
 151 }
 152
 153 static const VMStateDescription vmstate_pci_serial = {
 154     .name = "pci-serial",
 155     .version_id = 1,
 156     .minimum_version_id = 1,
 157     .fields      = (VMStateField[]) {
 158         VMSTATE_PCI_DEVICE(dev, PCISerialState),
 159         VMSTATE_STRUCT(state, PCISerialState, 0, vmstate_serial, SerialState),
 160         VMSTATE_END_OF_LIST()
 161     }
 162 };
 163
 164 static const VMStateDescription vmstate_pci_multi_serial = {
 165     .name = "pci-serial-multi",
 166     .version_id = 1,
 167     .minimum_version_id = 1,
 168     .fields      = (VMStateField[]) {
 169         VMSTATE_PCI_DEVICE(dev, PCIMultiSerialState),
 170         VMSTATE_STRUCT_ARRAY(state, PCIMultiSerialState, PCI_SERIAL_MAX_PORTS,
 171                              0, vmstate_serial, SerialState),
 172         VMSTATE_UINT32_ARRAY(level, PCIMultiSerialState, PCI_SERIAL_MAX_PORTS),
 173         VMSTATE_END_OF_LIST()
 174     }
 175 };
 176
 177 static Property serial_pci_properties[] = {
 178     DEFINE_PROP_CHR("chardev",  PCISerialState, state.chr),
 179     DEFINE_PROP_END_OF_LIST(),
 180 };
 181
 182 static Property multi_2x_serial_pci_properties[] = {
 183     DEFINE_PROP_CHR("chardev1",  PCIMultiSerialState, state[0].chr),
 184     DEFINE_PROP_CHR("chardev2",  PCIMultiSerialState, state[1].chr),
 185     DEFINE_PROP_END_OF_LIST(),
 186 };
 187
 188 static Property multi_4x_serial_pci_properties[] = {
 189     DEFINE_PROP_CHR("chardev1",  PCIMultiSerialState, state[0].chr),
 190     DEFINE_PROP_CHR("chardev2",  PCIMultiSerialState, state[1].chr),
 191     DEFINE_PROP_CHR("chardev3",  PCIMultiSerialState, state[2].chr),
 192     DEFINE_PROP_CHR("chardev4",  PCIMultiSerialState, state[3].chr),
 193     DEFINE_PROP_END_OF_LIST(),
 194 };
 195
 196 static void 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 = serial_pci_init;
 201     pc->exit = serial_pci_exit;
 202     pc->vendor_id = PCI_VENDOR_ID_REDHAT;
 203     pc->device_id = PCI_DEVICE_ID_REDHAT_SERIAL;
 204     pc->revision = 1;
 205     pc->class_id = PCI_CLASS_COMMUNICATION_SERIAL;
 206     dc->vmsd = &vmstate_pci_serial;
 207     dc->props = serial_pci_properties;
 208     set_bit(DEVICE_CATEGORY_INPUT, dc->categories);
 209 }
 210
 211 static void multi_2x_serial_pci_class_initfn(ObjectClass *klass, void *data)
 212 {
 213     DeviceClass *dc = DEVICE_CLASS(klass);
 214     PCIDeviceClass *pc = PCI_DEVICE_CLASS(klass);
 215     pc->init = multi_serial_pci_init;
 216     pc->exit = multi_serial_pci_exit;
 217     pc->vendor_id = PCI_VENDOR_ID_REDHAT;
 218     pc->device_id = PCI_DEVICE_ID_REDHAT_SERIAL2;
 219     pc->revision = 1;
 220     pc->class_id = PCI_CLASS_COMMUNICATION_SERIAL;
 221     dc->vmsd = &vmstate_pci_multi_serial;
 222     dc->props = multi_2x_serial_pci_properties;
 223     set_bit(DEVICE_CATEGORY_INPUT, dc->categories);
 224 }
 225
 226 static void multi_4x_serial_pci_class_initfn(ObjectClass *klass, void *data)
 227 {
 228     DeviceClass *dc = DEVICE_CLASS(klass);
 229     PCIDeviceClass *pc = PCI_DEVICE_CLASS(klass);
 230     pc->init = multi_serial_pci_init;
 231     pc->exit = multi_serial_pci_exit;
 232     pc->vendor_id = PCI_VENDOR_ID_REDHAT;
 233     pc->device_id = PCI_DEVICE_ID_REDHAT_SERIAL4;
 234     pc->revision = 1;
 235     pc->class_id = PCI_CLASS_COMMUNICATION_SERIAL;
 236     dc->vmsd = &vmstate_pci_multi_serial;
 237     dc->props = multi_4x_serial_pci_properties;
 238     set_bit(DEVICE_CATEGORY_INPUT, dc->categories);
 239 }
 240
 241 static const TypeInfo serial_pci_info = {
 242     .name          = "pci-serial",
 243     .parent        = TYPE_PCI_DEVICE,
 244     .instance_size = sizeof(PCISerialState),
 245     .class_init    = serial_pci_class_initfn,
 246 };
 247
 248 static const TypeInfo multi_2x_serial_pci_info = {
 249     .name          = "pci-serial-2x",
 250     .parent        = TYPE_PCI_DEVICE,
 251     .instance_size = sizeof(PCIMultiSerialState),
 252     .class_init    = multi_2x_serial_pci_class_initfn,
 253 };
 254
 255 static const TypeInfo multi_4x_serial_pci_info = {
 256     .name          = "pci-serial-4x",
 257     .parent        = TYPE_PCI_DEVICE,
 258     .instance_size = sizeof(PCIMultiSerialState),
 259     .class_init    = multi_4x_serial_pci_class_initfn,
 260 };
 261
 262 static void serial_pci_register_types(void)
 263 {
 264     type_register_static(&serial_pci_info);
 265     type_register_static(&multi_2x_serial_pci_info);
 266     type_register_static(&multi_4x_serial_pci_info);
 267 }
 268
 269 type_init(serial_pci_register_types)