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 | |
30 | static ISABus *isabus; |
31 | |
32 | static void isabus_dev_print(Monitor *mon, DeviceState *dev, int indent); |
33 | static char *isabus_get_fw_dev_path(DeviceState *dev); |
34 | |
35 | static 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 | |
43 | static const TypeInfo isa_dma_info = { |
44 | .name = TYPE_ISADMA, |
45 | .parent = TYPE_INTERFACE, |
46 | .class_size = sizeof(IsaDmaClass), |
47 | }; |
48 | |
49 | static 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 | |
56 | ISABus *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 | |
74 | void 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 | */ |
85 | qemu_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 | |
94 | void 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 | |
102 | void 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 | |
109 | void 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 | |
117 | IsaDma *isa_get_dma(ISABus *bus, int nchan) |
118 | { |
119 | assert(bus); |
120 | return bus->dma[nchan > 3 ? 1 : 0]; |
121 | } |
122 | |
123 | static 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 | |
130 | void 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 | |
136 | void 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 | |
152 | static 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 | |
160 | ISADevice *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 | |
168 | ISADevice *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 | |
176 | ISADevice *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 | |
185 | ISADevice *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 | |
207 | static 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 | |
220 | static 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 | |
228 | static 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 | |
235 | static 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 | |
241 | static 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 | |
251 | static 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 | |
259 | static 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 | |
273 | MemoryRegion *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 | |
282 | MemoryRegion *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 | |
291 | type_init(isabus_register_types) |
292 | |