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
20#include "qemu/osdep.h"
21#include "qemu/error-report.h"
22#include "qemu/module.h"
23#include "qapi/error.h"
24#include "hw/hw.h"
25#include "monitor/monitor.h"
26#include "hw/sysbus.h"
27#include "sysemu/sysemu.h"
28#include "hw/isa/isa.h"
29
30static ISABus *isabus;
31
32static void isabus_dev_print(Monitor *mon, DeviceState *dev, int indent);
33static char *isabus_get_fw_dev_path(DeviceState *dev);
34
35static void isa_bus_class_init(ObjectClass *klass, void *data)
36{
37 BusClass *k = BUS_CLASS(klass);
38
39 k->print_dev = isabus_dev_print;
40 k->get_fw_dev_path = isabus_get_fw_dev_path;
41}
42
43static const TypeInfo isa_dma_info = {
44 .name = TYPE_ISADMA,
45 .parent = TYPE_INTERFACE,
46 .class_size = sizeof(IsaDmaClass),
47};
48
49static const TypeInfo isa_bus_info = {
50 .name = TYPE_ISA_BUS,
51 .parent = TYPE_BUS,
52 .instance_size = sizeof(ISABus),
53 .class_init = isa_bus_class_init,
54};
55
56ISABus *isa_bus_new(DeviceState *dev, MemoryRegion* address_space,
57 MemoryRegion *address_space_io, Error **errp)
58{
59 if (isabus) {
60 error_setg(errp, "Can't create a second ISA bus");
61 return NULL;
62 }
63 if (!dev) {
64 dev = qdev_create(NULL, "isabus-bridge");
65 qdev_init_nofail(dev);
66 }
67
68 isabus = ISA_BUS(qbus_create(TYPE_ISA_BUS, dev, NULL));
69 isabus->address_space = address_space;
70 isabus->address_space_io = address_space_io;
71 return isabus;
72}
73
74void isa_bus_irqs(ISABus *bus, qemu_irq *irqs)
75{
76 bus->irqs = irqs;
77}
78
79/*
80 * isa_get_irq() returns the corresponding qemu_irq entry for the i8259.
81 *
82 * This function is only for special cases such as the 'ferr', and
83 * temporary use for normal devices until they are converted to qdev.
84 */
85qemu_irq isa_get_irq(ISADevice *dev, int isairq)
86{
87 assert(!dev || ISA_BUS(qdev_get_parent_bus(DEVICE(dev))) == isabus);
88 if (isairq < 0 || isairq > 15) {
89 hw_error("isa irq %d invalid", isairq);
90 }
91 return isabus->irqs[isairq];
92}
93
94void isa_init_irq(ISADevice *dev, qemu_irq *p, int isairq)
95{
96 assert(dev->nirqs < ARRAY_SIZE(dev->isairq));
97 dev->isairq[dev->nirqs] = isairq;
98 *p = isa_get_irq(dev, isairq);
99 dev->nirqs++;
100}
101
102void isa_connect_gpio_out(ISADevice *isadev, int gpioirq, int isairq)
103{
104 qemu_irq irq;
105 isa_init_irq(isadev, &irq, isairq);
106 qdev_connect_gpio_out(DEVICE(isadev), gpioirq, irq);
107}
108
109void isa_bus_dma(ISABus *bus, IsaDma *dma8, IsaDma *dma16)
110{
111 assert(bus && dma8 && dma16);
112 assert(!bus->dma[0] && !bus->dma[1]);
113 bus->dma[0] = dma8;
114 bus->dma[1] = dma16;
115}
116
117IsaDma *isa_get_dma(ISABus *bus, int nchan)
118{
119 assert(bus);
120 return bus->dma[nchan > 3 ? 1 : 0];
121}
122
123static inline void isa_init_ioport(ISADevice *dev, uint16_t ioport)
124{
125 if (dev && (dev->ioport_id == 0 || ioport < dev->ioport_id)) {
126 dev->ioport_id = ioport;
127 }
128}
129
130void isa_register_ioport(ISADevice *dev, MemoryRegion *io, uint16_t start)
131{
132 memory_region_add_subregion(isabus->address_space_io, start, io);
133 isa_init_ioport(dev, start);
134}
135
136void isa_register_portio_list(ISADevice *dev,
137 PortioList *piolist, uint16_t start,
138 const MemoryRegionPortio *pio_start,
139 void *opaque, const char *name)
140{
141 assert(piolist && !piolist->owner);
142
143 /* START is how we should treat DEV, regardless of the actual
144 contents of the portio array. This is how the old code
145 actually handled e.g. the FDC device. */
146 isa_init_ioport(dev, start);
147
148 portio_list_init(piolist, OBJECT(dev), pio_start, opaque, name);
149 portio_list_add(piolist, isabus->address_space_io, start);
150}
151
152static void isa_device_init(Object *obj)
153{
154 ISADevice *dev = ISA_DEVICE(obj);
155
156 dev->isairq[0] = -1;
157 dev->isairq[1] = -1;
158}
159
160ISADevice *isa_create(ISABus *bus, const char *name)
161{
162 DeviceState *dev;
163
164 dev = qdev_create(BUS(bus), name);
165 return ISA_DEVICE(dev);
166}
167
168ISADevice *isa_try_create(ISABus *bus, const char *name)
169{
170 DeviceState *dev;
171
172 dev = qdev_try_create(BUS(bus), name);
173 return ISA_DEVICE(dev);
174}
175
176ISADevice *isa_create_simple(ISABus *bus, const char *name)
177{
178 ISADevice *dev;
179
180 dev = isa_create(bus, name);
181 qdev_init_nofail(DEVICE(dev));
182 return dev;
183}
184
185ISADevice *isa_vga_init(ISABus *bus)
186{
187 switch (vga_interface_type) {
188 case VGA_CIRRUS:
189 return isa_create_simple(bus, "isa-cirrus-vga");
190 case VGA_QXL:
191 error_report("%s: qxl: no PCI bus", __func__);
192 return NULL;
193 case VGA_STD:
194 return isa_create_simple(bus, "isa-vga");
195 case VGA_VMWARE:
196 error_report("%s: vmware_vga: no PCI bus", __func__);
197 return NULL;
198 case VGA_VIRTIO:
199 error_report("%s: virtio-vga: no PCI bus", __func__);
200 return NULL;
201 case VGA_NONE:
202 default:
203 return NULL;
204 }
205}
206
207static void isabus_dev_print(Monitor *mon, DeviceState *dev, int indent)
208{
209 ISADevice *d = ISA_DEVICE(dev);
210
211 if (d->isairq[1] != -1) {
212 monitor_printf(mon, "%*sisa irqs %d,%d\n", indent, "",
213 d->isairq[0], d->isairq[1]);
214 } else if (d->isairq[0] != -1) {
215 monitor_printf(mon, "%*sisa irq %d\n", indent, "",
216 d->isairq[0]);
217 }
218}
219
220static void isabus_bridge_class_init(ObjectClass *klass, void *data)
221{
222 DeviceClass *dc = DEVICE_CLASS(klass);
223
224 set_bit(DEVICE_CATEGORY_BRIDGE, dc->categories);
225 dc->fw_name = "isa";
226}
227
228static const TypeInfo isabus_bridge_info = {
229 .name = "isabus-bridge",
230 .parent = TYPE_SYS_BUS_DEVICE,
231 .instance_size = sizeof(SysBusDevice),
232 .class_init = isabus_bridge_class_init,
233};
234
235static void isa_device_class_init(ObjectClass *klass, void *data)
236{
237 DeviceClass *k = DEVICE_CLASS(klass);
238 k->bus_type = TYPE_ISA_BUS;
239}
240
241static const TypeInfo isa_device_type_info = {
242 .name = TYPE_ISA_DEVICE,
243 .parent = TYPE_DEVICE,
244 .instance_size = sizeof(ISADevice),
245 .instance_init = isa_device_init,
246 .abstract = true,
247 .class_size = sizeof(ISADeviceClass),
248 .class_init = isa_device_class_init,
249};
250
251static void isabus_register_types(void)
252{
253 type_register_static(&isa_dma_info);
254 type_register_static(&isa_bus_info);
255 type_register_static(&isabus_bridge_info);
256 type_register_static(&isa_device_type_info);
257}
258
259static char *isabus_get_fw_dev_path(DeviceState *dev)
260{
261 ISADevice *d = ISA_DEVICE(dev);
262 char path[40];
263 int off;
264
265 off = snprintf(path, sizeof(path), "%s", qdev_fw_name(dev));
266 if (d->ioport_id) {
267 snprintf(path + off, sizeof(path) - off, "@%04x", d->ioport_id);
268 }
269
270 return g_strdup(path);
271}
272
273MemoryRegion *isa_address_space(ISADevice *dev)
274{
275 if (dev) {
276 return isa_bus_from_device(dev)->address_space;
277 }
278
279 return isabus->address_space;
280}
281
282MemoryRegion *isa_address_space_io(ISADevice *dev)
283{
284 if (dev) {
285 return isa_bus_from_device(dev)->address_space_io;
286 }
287
288 return isabus->address_space_io;
289}
290
291type_init(isabus_register_types)
292