hw/isa/isa-bus.c

   1 /*
   2  * isa bus support for qdev.
   3  *
   4  * Copyright (c) 2009 Gerd Hoffmann <kraxel@redhat.com>
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, see <http://www.gnu.org/licenses/>.
  18  */
  19 #include "qemu/osdep.h"
  20 #include "qemu/error-report.h"
  21 #include "qapi/error.h"
  22 #include "hw/hw.h"
  23 #include "monitor/monitor.h"
  24 #include "hw/sysbus.h"
  25 #include "sysemu/sysemu.h"
  26 #include "hw/isa/isa.h"
  27 #include "hw/i386/pc.h"
  28
  29 static ISABus *isabus;
  30
  31 static void isabus_dev_print(Monitor *mon, DeviceState *dev, int indent);
  32 static char *isabus_get_fw_dev_path(DeviceState *dev);
  33
  34 static void isa_bus_class_init(ObjectClass *klass, void *data)
  35 {
  36     BusClass *k = BUS_CLASS(klass);
  37
  38     k->print_dev = isabus_dev_print;
  39     k->get_fw_dev_path = isabus_get_fw_dev_path;
  40 }
  41
  42 static const TypeInfo isa_dma_info = {
  43     .name = TYPE_ISADMA,
  44     .parent = TYPE_INTERFACE,
  45     .class_size = sizeof(IsaDmaClass),
  46 };
  47
  48 static const TypeInfo isa_bus_info = {
  49     .name = TYPE_ISA_BUS,
  50     .parent = TYPE_BUS,
  51     .instance_size = sizeof(ISABus),
  52     .class_init = isa_bus_class_init,
  53 };
  54
  55 ISABus *isa_bus_new(DeviceState *dev, MemoryRegion* address_space,
  56                     MemoryRegion *address_space_io, Error **errp)
  57 {
  58     if (isabus) {
  59         error_setg(errp, "Can't create a second ISA bus");
  60         return NULL;
  61     }
  62     if (!dev) {
  63         dev = qdev_create(NULL, "isabus-bridge");
  64         qdev_init_nofail(dev);
  65     }
  66
  67     isabus = ISA_BUS(qbus_create(TYPE_ISA_BUS, dev, NULL));
  68     isabus->address_space = address_space;
  69     isabus->address_space_io = address_space_io;
  70     return isabus;
  71 }
  72
  73 void isa_bus_irqs(ISABus *bus, qemu_irq *irqs)
  74 {
  75     bus->irqs = irqs;
  76 }
  77
  78 /*
  79  * isa_get_irq() returns the corresponding qemu_irq entry for the i8259.
  80  *
  81  * This function is only for special cases such as the 'ferr', and
  82  * temporary use for normal devices until they are converted to qdev.
  83  */
  84 qemu_irq isa_get_irq(ISADevice *dev, int isairq)
  85 {
  86     assert(!dev || ISA_BUS(qdev_get_parent_bus(DEVICE(dev))) == isabus);
  87     if (isairq < 0 || isairq > 15) {
  88         hw_error("isa irq %d invalid", isairq);
  89     }
  90     return isabus->irqs[isairq];
  91 }
  92
  93 void isa_init_irq(ISADevice *dev, qemu_irq *p, int isairq)
  94 {
  95     assert(dev->nirqs < ARRAY_SIZE(dev->isairq));
  96     dev->isairq[dev->nirqs] = isairq;
  97     *p = isa_get_irq(dev, isairq);
  98     dev->nirqs++;
  99 }
 100
 101 void isa_connect_gpio_out(ISADevice *isadev, int gpioirq, int isairq)
 102 {
 103     qemu_irq irq;
 104     isa_init_irq(isadev, &irq, isairq);
 105     qdev_connect_gpio_out(DEVICE(isadev), gpioirq, irq);
 106 }
 107
 108 void isa_bus_dma(ISABus *bus, IsaDma *dma8, IsaDma *dma16)
 109 {
 110     assert(bus && dma8 && dma16);
 111     assert(!bus->dma[0] && !bus->dma[1]);
 112     bus->dma[0] = dma8;
 113     bus->dma[1] = dma16;
 114 }
 115
 116 IsaDma *isa_get_dma(ISABus *bus, int nchan)
 117 {
 118     assert(bus);
 119     return bus->dma[nchan > 3 ? 1 : 0];
 120 }
 121
 122 static inline void isa_init_ioport(ISADevice *dev, uint16_t ioport)
 123 {
 124     if (dev && (dev->ioport_id == 0 || ioport < dev->ioport_id)) {
 125         dev->ioport_id = ioport;
 126     }
 127 }
 128
 129 void isa_register_ioport(ISADevice *dev, MemoryRegion *io, uint16_t start)
 130 {
 131     memory_region_add_subregion(isabus->address_space_io, start, io);
 132     isa_init_ioport(dev, start);
 133 }
 134
 135 void isa_register_portio_list(ISADevice *dev,
 136                               PortioList *piolist, uint16_t start,
 137                               const MemoryRegionPortio *pio_start,
 138                               void *opaque, const char *name)
 139 {
 140     assert(piolist && !piolist->owner);
 141
 142     /* START is how we should treat DEV, regardless of the actual
 143        contents of the portio array.  This is how the old code
 144        actually handled e.g. the FDC device.  */
 145     isa_init_ioport(dev, start);
 146
 147     portio_list_init(piolist, OBJECT(dev), pio_start, opaque, name);
 148     portio_list_add(piolist, isabus->address_space_io, start);
 149 }
 150
 151 static void isa_device_init(Object *obj)
 152 {
 153     ISADevice *dev = ISA_DEVICE(obj);
 154
 155     dev->isairq[0] = -1;
 156     dev->isairq[1] = -1;
 157 }
 158
 159 ISADevice *isa_create(ISABus *bus, const char *name)
 160 {
 161     DeviceState *dev;
 162
 163     dev = qdev_create(BUS(bus), name);
 164     return ISA_DEVICE(dev);
 165 }
 166
 167 ISADevice *isa_try_create(ISABus *bus, const char *name)
 168 {
 169     DeviceState *dev;
 170
 171     dev = qdev_try_create(BUS(bus), name);
 172     return ISA_DEVICE(dev);
 173 }
 174
 175 ISADevice *isa_create_simple(ISABus *bus, const char *name)
 176 {
 177     ISADevice *dev;
 178
 179     dev = isa_create(bus, name);
 180     qdev_init_nofail(DEVICE(dev));
 181     return dev;
 182 }
 183
 184 ISADevice *isa_vga_init(ISABus *bus)
 185 {
 186     switch (vga_interface_type) {
 187     case VGA_CIRRUS:
 188         return isa_create_simple(bus, "isa-cirrus-vga");
 189     case VGA_QXL:
 190         error_report("%s: qxl: no PCI bus", __func__);
 191         return NULL;
 192     case VGA_STD:
 193         return isa_create_simple(bus, "isa-vga");
 194     case VGA_VMWARE:
 195         error_report("%s: vmware_vga: no PCI bus", __func__);
 196         return NULL;
 197     case VGA_VIRTIO:
 198         error_report("%s: virtio-vga: no PCI bus", __func__);
 199         return NULL;
 200     case VGA_NONE:
 201     default:
 202         return NULL;
 203     }
 204 }
 205
 206 static void isabus_dev_print(Monitor *mon, DeviceState *dev, int indent)
 207 {
 208     ISADevice *d = ISA_DEVICE(dev);
 209
 210     if (d->isairq[1] != -1) {
 211         monitor_printf(mon, "%*sisa irqs %d,%d\n", indent, "",
 212                        d->isairq[0], d->isairq[1]);
 213     } else if (d->isairq[0] != -1) {
 214         monitor_printf(mon, "%*sisa irq %d\n", indent, "",
 215                        d->isairq[0]);
 216     }
 217 }
 218
 219 static void isabus_bridge_class_init(ObjectClass *klass, void *data)
 220 {
 221     DeviceClass *dc = DEVICE_CLASS(klass);
 222
 223     set_bit(DEVICE_CATEGORY_BRIDGE, dc->categories);
 224     dc->fw_name = "isa";
 225 }
 226
 227 static const TypeInfo isabus_bridge_info = {
 228     .name          = "isabus-bridge",
 229     .parent        = TYPE_SYS_BUS_DEVICE,
 230     .instance_size = sizeof(SysBusDevice),
 231     .class_init    = isabus_bridge_class_init,
 232 };
 233
 234 static void isa_device_class_init(ObjectClass *klass, void *data)
 235 {
 236     DeviceClass *k = DEVICE_CLASS(klass);
 237     k->bus_type = TYPE_ISA_BUS;
 238 }
 239
 240 static const TypeInfo isa_device_type_info = {
 241     .name = TYPE_ISA_DEVICE,
 242     .parent = TYPE_DEVICE,
 243     .instance_size = sizeof(ISADevice),
 244     .instance_init = isa_device_init,
 245     .abstract = true,
 246     .class_size = sizeof(ISADeviceClass),
 247     .class_init = isa_device_class_init,
 248 };
 249
 250 static void isabus_register_types(void)
 251 {
 252     type_register_static(&isa_dma_info);
 253     type_register_static(&isa_bus_info);
 254     type_register_static(&isabus_bridge_info);
 255     type_register_static(&isa_device_type_info);
 256 }
 257
 258 static char *isabus_get_fw_dev_path(DeviceState *dev)
 259 {
 260     ISADevice *d = ISA_DEVICE(dev);
 261     char path[40];
 262     int off;
 263
 264     off = snprintf(path, sizeof(path), "%s", qdev_fw_name(dev));
 265     if (d->ioport_id) {
 266         snprintf(path + off, sizeof(path) - off, "@%04x", d->ioport_id);
 267     }
 268
 269     return g_strdup(path);
 270 }
 271
 272 MemoryRegion *isa_address_space(ISADevice *dev)
 273 {
 274     if (dev) {
 275         return isa_bus_from_device(dev)->address_space;
 276     }
 277
 278     return isabus->address_space;
 279 }
 280
 281 MemoryRegion *isa_address_space_io(ISADevice *dev)
 282 {
 283     if (dev) {
 284         return isa_bus_from_device(dev)->address_space_io;
 285     }
 286
 287     return isabus->address_space_io;
 288 }
 289
 290 type_init(isabus_register_types)
 291
 292 static void parallel_init(ISABus *bus, int index, Chardev *chr)
 293 {
 294     DeviceState *dev;
 295     ISADevice *isadev;
 296
 297     isadev = isa_create(bus, "isa-parallel");
 298     dev = DEVICE(isadev);
 299     qdev_prop_set_uint32(dev, "index", index);
 300     qdev_prop_set_chr(dev, "chardev", chr);
 301     qdev_init_nofail(dev);
 302 }
 303
 304 void parallel_hds_isa_init(ISABus *bus, int n)
 305 {
 306     int i;
 307
 308     assert(n <= MAX_PARALLEL_PORTS);
 309
 310     for (i = 0; i < n; i++) {
 311         if (parallel_hds[i]) {
 312             parallel_init(bus, i, parallel_hds[i]);
 313         }
 314     }
 315 }