2 * QEMU Intel 82374 emulation (Enhanced DMA controller)
4 * Copyright (c) 2010 Hervé Poussineau
6 * Permission is hereby granted, free of charge, to any person obtaining a copy
7 * of this software and associated documentation files (the "Software"), to deal
8 * in the Software without restriction, including without limitation the rights
9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10 * copies of the Software, and to permit persons to whom the Software is
11 * furnished to do so, subject to the following conditions:
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
27 //#define DEBUG_I82374
30 #define DPRINTF(fmt, ...) \
31 do { fprintf(stderr, "i82374: " fmt , ## __VA_ARGS__); } while (0)
33 #define DPRINTF(fmt, ...) \
36 #define BADF(fmt, ...) \
37 do { fprintf(stderr, "i82374 ERROR: " fmt , ## __VA_ARGS__); } while (0)
39 typedef struct I82374State {
44 static const VMStateDescription vmstate_i82374 = {
47 .minimum_version_id = 0,
48 .fields = (VMStateField[]) {
49 VMSTATE_UINT8_ARRAY(commands, I82374State, 8),
54 static uint32_t i82374_read_isr(void *opaque, uint32_t nport)
58 BADF("%s: %08x\n", __func__, nport);
60 DPRINTF("%s: %08x=%08x\n", __func__, nport, val);
64 static void i82374_write_command(void *opaque, uint32_t nport, uint32_t data)
66 DPRINTF("%s: %08x=%08x\n", __func__, nport, data);
69 /* Not Stop S/G command */
70 BADF("%s: %08x=%08x\n", __func__, nport, data);
74 static uint32_t i82374_read_status(void *opaque, uint32_t nport)
78 BADF("%s: %08x\n", __func__, nport);
80 DPRINTF("%s: %08x=%08x\n", __func__, nport, val);
84 static void i82374_write_descriptor(void *opaque, uint32_t nport, uint32_t data)
86 DPRINTF("%s: %08x=%08x\n", __func__, nport, data);
88 BADF("%s: %08x=%08x\n", __func__, nport, data);
91 static uint32_t i82374_read_descriptor(void *opaque, uint32_t nport)
95 BADF("%s: %08x\n", __func__, nport);
97 DPRINTF("%s: %08x=%08x\n", __func__, nport, val);
101 static void i82374_init(I82374State *s)
103 DMA_init(1, &s->out);
104 memset(s->commands, 0, sizeof(s->commands));
107 typedef struct ISAi82374State {
113 static const VMStateDescription vmstate_isa_i82374 = {
114 .name = "isa-i82374",
116 .minimum_version_id = 0,
117 .fields = (VMStateField[]) {
118 VMSTATE_STRUCT(state, ISAi82374State, 0, vmstate_i82374, I82374State),
119 VMSTATE_END_OF_LIST()
123 static int i82374_isa_init(ISADevice *dev)
125 ISAi82374State *isa = DO_UPCAST(ISAi82374State, dev, dev);
126 I82374State *s = &isa->state;
128 register_ioport_read(isa->iobase + 0x0A, 1, 1, i82374_read_isr, s);
129 register_ioport_write(isa->iobase + 0x10, 8, 1, i82374_write_command, s);
130 register_ioport_read(isa->iobase + 0x18, 8, 1, i82374_read_status, s);
131 register_ioport_write(isa->iobase + 0x20, 0x20, 1, i82374_write_descriptor, s);
132 register_ioport_read(isa->iobase + 0x20, 0x20, 1, i82374_read_descriptor, s);
136 qdev_init_gpio_out(&dev->qdev, &s->out, 1);
141 static Property i82374_properties[] = {
142 DEFINE_PROP_HEX32("iobase", ISAi82374State, iobase, 0x400),
143 DEFINE_PROP_END_OF_LIST()
146 static void i82374_class_init(ObjectClass *klass, void *data)
148 ISADeviceClass *k = ISA_DEVICE_CLASS(klass);
149 DeviceClass *dc = DEVICE_CLASS(klass);
151 k->init = i82374_isa_init;
152 dc->vmsd = &vmstate_isa_i82374;
153 dc->props = i82374_properties;
156 static TypeInfo i82374_isa_info = {
158 .parent = TYPE_ISA_DEVICE,
159 .instance_size = sizeof(ISAi82374State),
160 .class_init = i82374_class_init,
163 static void i82374_register_types(void)
165 type_register_static(&i82374_isa_info);
168 type_init(i82374_register_types)