149ab747fSPaolo Bonzini /*
249ab747fSPaolo Bonzini * QEMU Intel 82374 emulation (Enhanced DMA controller)
349ab747fSPaolo Bonzini *
449ab747fSPaolo Bonzini * Copyright (c) 2010 Hervé Poussineau
549ab747fSPaolo Bonzini *
649ab747fSPaolo Bonzini * Permission is hereby granted, free of charge, to any person obtaining a copy
749ab747fSPaolo Bonzini * of this software and associated documentation files (the "Software"), to deal
849ab747fSPaolo Bonzini * in the Software without restriction, including without limitation the rights
949ab747fSPaolo Bonzini * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
1049ab747fSPaolo Bonzini * copies of the Software, and to permit persons to whom the Software is
1149ab747fSPaolo Bonzini * furnished to do so, subject to the following conditions:
1249ab747fSPaolo Bonzini *
1349ab747fSPaolo Bonzini * The above copyright notice and this permission notice shall be included in
1449ab747fSPaolo Bonzini * all copies or substantial portions of the Software.
1549ab747fSPaolo Bonzini *
1649ab747fSPaolo Bonzini * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
1749ab747fSPaolo Bonzini * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
1849ab747fSPaolo Bonzini * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
1949ab747fSPaolo Bonzini * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
2049ab747fSPaolo Bonzini * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
2149ab747fSPaolo Bonzini * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
2249ab747fSPaolo Bonzini * THE SOFTWARE.
2349ab747fSPaolo Bonzini */
2449ab747fSPaolo Bonzini
250430891cSPeter Maydell #include "qemu/osdep.h"
264968a2c6SPhilippe Mathieu-Daudé #include "qapi/error.h"
270b8fa32fSMarkus Armbruster #include "qemu/module.h"
2849ab747fSPaolo Bonzini #include "hw/isa/isa.h"
29a27bd6c7SMarkus Armbruster #include "hw/qdev-properties.h"
30d6454270SMarkus Armbruster #include "migration/vmstate.h"
3155f613acSPhilippe Mathieu-Daudé #include "hw/dma/i8257.h"
32db1015e9SEduardo Habkost #include "qom/object.h"
3349ab747fSPaolo Bonzini
34449ae7ecSHervé Poussineau #define TYPE_I82374 "i82374"
358063396bSEduardo Habkost OBJECT_DECLARE_SIMPLE_TYPE(I82374State, I82374)
36449ae7ecSHervé Poussineau
3749ab747fSPaolo Bonzini //#define DEBUG_I82374
3849ab747fSPaolo Bonzini
3949ab747fSPaolo Bonzini #ifdef DEBUG_I82374
4049ab747fSPaolo Bonzini #define DPRINTF(fmt, ...) \
4149ab747fSPaolo Bonzini do { fprintf(stderr, "i82374: " fmt , ## __VA_ARGS__); } while (0)
4249ab747fSPaolo Bonzini #else
4349ab747fSPaolo Bonzini #define DPRINTF(fmt, ...) \
4449ab747fSPaolo Bonzini do {} while (0)
4549ab747fSPaolo Bonzini #endif
4649ab747fSPaolo Bonzini #define BADF(fmt, ...) \
4749ab747fSPaolo Bonzini do { fprintf(stderr, "i82374 ERROR: " fmt , ## __VA_ARGS__); } while (0)
4849ab747fSPaolo Bonzini
49db1015e9SEduardo Habkost struct I82374State {
50449ae7ecSHervé Poussineau ISADevice parent_obj;
51449ae7ecSHervé Poussineau
52449ae7ecSHervé Poussineau uint32_t iobase;
5349ab747fSPaolo Bonzini uint8_t commands[8];
54848696bfSKirill Batuzov PortioList port_list;
55db1015e9SEduardo Habkost };
5649ab747fSPaolo Bonzini
5749ab747fSPaolo Bonzini static const VMStateDescription vmstate_i82374 = {
5849ab747fSPaolo Bonzini .name = "i82374",
5949ab747fSPaolo Bonzini .version_id = 0,
6049ab747fSPaolo Bonzini .minimum_version_id = 0,
6163e6b564SRichard Henderson .fields = (const VMStateField[]) {
6249ab747fSPaolo Bonzini VMSTATE_UINT8_ARRAY(commands, I82374State, 8),
6349ab747fSPaolo Bonzini VMSTATE_END_OF_LIST()
6449ab747fSPaolo Bonzini },
6549ab747fSPaolo Bonzini };
6649ab747fSPaolo Bonzini
i82374_read_isr(void * opaque,uint32_t nport)6749ab747fSPaolo Bonzini static uint32_t i82374_read_isr(void *opaque, uint32_t nport)
6849ab747fSPaolo Bonzini {
6949ab747fSPaolo Bonzini uint32_t val = 0;
7049ab747fSPaolo Bonzini
7149ab747fSPaolo Bonzini BADF("%s: %08x\n", __func__, nport);
7249ab747fSPaolo Bonzini
7349ab747fSPaolo Bonzini DPRINTF("%s: %08x=%08x\n", __func__, nport, val);
7449ab747fSPaolo Bonzini return val;
7549ab747fSPaolo Bonzini }
7649ab747fSPaolo Bonzini
i82374_write_command(void * opaque,uint32_t nport,uint32_t data)7749ab747fSPaolo Bonzini static void i82374_write_command(void *opaque, uint32_t nport, uint32_t data)
7849ab747fSPaolo Bonzini {
7949ab747fSPaolo Bonzini DPRINTF("%s: %08x=%08x\n", __func__, nport, data);
8049ab747fSPaolo Bonzini
8149ab747fSPaolo Bonzini if (data != 0x42) {
8249ab747fSPaolo Bonzini /* Not Stop S/G command */
8349ab747fSPaolo Bonzini BADF("%s: %08x=%08x\n", __func__, nport, data);
8449ab747fSPaolo Bonzini }
8549ab747fSPaolo Bonzini }
8649ab747fSPaolo Bonzini
i82374_read_status(void * opaque,uint32_t nport)8749ab747fSPaolo Bonzini static uint32_t i82374_read_status(void *opaque, uint32_t nport)
8849ab747fSPaolo Bonzini {
8949ab747fSPaolo Bonzini uint32_t val = 0;
9049ab747fSPaolo Bonzini
9149ab747fSPaolo Bonzini BADF("%s: %08x\n", __func__, nport);
9249ab747fSPaolo Bonzini
9349ab747fSPaolo Bonzini DPRINTF("%s: %08x=%08x\n", __func__, nport, val);
9449ab747fSPaolo Bonzini return val;
9549ab747fSPaolo Bonzini }
9649ab747fSPaolo Bonzini
i82374_write_descriptor(void * opaque,uint32_t nport,uint32_t data)9749ab747fSPaolo Bonzini static void i82374_write_descriptor(void *opaque, uint32_t nport, uint32_t data)
9849ab747fSPaolo Bonzini {
9949ab747fSPaolo Bonzini DPRINTF("%s: %08x=%08x\n", __func__, nport, data);
10049ab747fSPaolo Bonzini
10149ab747fSPaolo Bonzini BADF("%s: %08x=%08x\n", __func__, nport, data);
10249ab747fSPaolo Bonzini }
10349ab747fSPaolo Bonzini
i82374_read_descriptor(void * opaque,uint32_t nport)10449ab747fSPaolo Bonzini static uint32_t i82374_read_descriptor(void *opaque, uint32_t nport)
10549ab747fSPaolo Bonzini {
10649ab747fSPaolo Bonzini uint32_t val = 0;
10749ab747fSPaolo Bonzini
10849ab747fSPaolo Bonzini BADF("%s: %08x\n", __func__, nport);
10949ab747fSPaolo Bonzini
11049ab747fSPaolo Bonzini DPRINTF("%s: %08x=%08x\n", __func__, nport, val);
11149ab747fSPaolo Bonzini return val;
11249ab747fSPaolo Bonzini }
11349ab747fSPaolo Bonzini
114f94b64acSJan Kiszka static const MemoryRegionPortio i82374_portio_list[] = {
115f94b64acSJan Kiszka { 0x0A, 1, 1, .read = i82374_read_isr, },
116f94b64acSJan Kiszka { 0x10, 8, 1, .write = i82374_write_command, },
117f94b64acSJan Kiszka { 0x18, 8, 1, .read = i82374_read_status, },
118f94b64acSJan Kiszka { 0x20, 0x20, 1,
119f94b64acSJan Kiszka .write = i82374_write_descriptor, .read = i82374_read_descriptor, },
120f94b64acSJan Kiszka PORTIO_END_OF_LIST(),
121f94b64acSJan Kiszka };
122f94b64acSJan Kiszka
i82374_realize(DeviceState * dev,Error ** errp)123449ae7ecSHervé Poussineau static void i82374_realize(DeviceState *dev, Error **errp)
12449ab747fSPaolo Bonzini {
125449ae7ecSHervé Poussineau I82374State *s = I82374(dev);
1264968a2c6SPhilippe Mathieu-Daudé ISABus *isa_bus = isa_bus_from_device(ISA_DEVICE(dev));
1274968a2c6SPhilippe Mathieu-Daudé
128dc8d6cf2SPhilippe Mathieu-Daudé if (isa_bus_get_dma(isa_bus, 0)) {
1294968a2c6SPhilippe Mathieu-Daudé error_setg(errp, "DMA already initialized on ISA bus");
1304968a2c6SPhilippe Mathieu-Daudé return;
1314968a2c6SPhilippe Mathieu-Daudé }
132*5e37bc49SPhilippe Mathieu-Daudé i8257_dma_init(OBJECT(dev), isa_bus, true);
13349ab747fSPaolo Bonzini
134449ae7ecSHervé Poussineau portio_list_init(&s->port_list, OBJECT(s), i82374_portio_list, s,
135848696bfSKirill Batuzov "i82374");
136449ae7ecSHervé Poussineau portio_list_add(&s->port_list, isa_address_space_io(&s->parent_obj),
137449ae7ecSHervé Poussineau s->iobase);
13849ab747fSPaolo Bonzini
139449ae7ecSHervé Poussineau memset(s->commands, 0, sizeof(s->commands));
14049ab747fSPaolo Bonzini }
14149ab747fSPaolo Bonzini
14249ab747fSPaolo Bonzini static Property i82374_properties[] = {
143449ae7ecSHervé Poussineau DEFINE_PROP_UINT32("iobase", I82374State, iobase, 0x400),
14449ab747fSPaolo Bonzini DEFINE_PROP_END_OF_LIST()
14549ab747fSPaolo Bonzini };
14649ab747fSPaolo Bonzini
i82374_class_init(ObjectClass * klass,void * data)14749ab747fSPaolo Bonzini static void i82374_class_init(ObjectClass *klass, void *data)
14849ab747fSPaolo Bonzini {
14949ab747fSPaolo Bonzini DeviceClass *dc = DEVICE_CLASS(klass);
15049ab747fSPaolo Bonzini
151449ae7ecSHervé Poussineau dc->realize = i82374_realize;
152449ae7ecSHervé Poussineau dc->vmsd = &vmstate_i82374;
1534f67d30bSMarc-André Lureau device_class_set_props(dc, i82374_properties);
15449ab747fSPaolo Bonzini }
15549ab747fSPaolo Bonzini
156449ae7ecSHervé Poussineau static const TypeInfo i82374_info = {
157eb1440e7SAndreas Färber .name = TYPE_I82374,
15849ab747fSPaolo Bonzini .parent = TYPE_ISA_DEVICE,
159449ae7ecSHervé Poussineau .instance_size = sizeof(I82374State),
16049ab747fSPaolo Bonzini .class_init = i82374_class_init,
16149ab747fSPaolo Bonzini };
16249ab747fSPaolo Bonzini
i82374_register_types(void)16349ab747fSPaolo Bonzini static void i82374_register_types(void)
16449ab747fSPaolo Bonzini {
165449ae7ecSHervé Poussineau type_register_static(&i82374_info);
16649ab747fSPaolo Bonzini }
16749ab747fSPaolo Bonzini
16849ab747fSPaolo Bonzini type_init(i82374_register_types)
169