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1.1 root 1: /*
2: * LatticeMico32 JTAG UART model.
3: *
4: * Copyright (c) 2010 Michael Walle <[email protected]>
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 "hw.h"
21: #include "sysbus.h"
22: #include "trace.h"
23: #include "qemu-char.h"
24:
25: #include "lm32_juart.h"
26:
27: enum {
28: LM32_JUART_MIN_SAVE_VERSION = 0,
29: LM32_JUART_CURRENT_SAVE_VERSION = 0,
30: LM32_JUART_MAX_SAVE_VERSION = 0,
31: };
32:
33: enum {
34: JTX_FULL = (1<<8),
35: };
36:
37: enum {
38: JRX_FULL = (1<<8),
39: };
40:
41: struct LM32JuartState {
42: SysBusDevice busdev;
43: CharDriverState *chr;
44:
45: uint32_t jtx;
46: uint32_t jrx;
47: };
48: typedef struct LM32JuartState LM32JuartState;
49:
50: uint32_t lm32_juart_get_jtx(DeviceState *d)
51: {
52: LM32JuartState *s = container_of(d, LM32JuartState, busdev.qdev);
53:
54: trace_lm32_juart_get_jtx(s->jtx);
55: return s->jtx;
56: }
57:
58: uint32_t lm32_juart_get_jrx(DeviceState *d)
59: {
60: LM32JuartState *s = container_of(d, LM32JuartState, busdev.qdev);
61:
62: trace_lm32_juart_get_jrx(s->jrx);
63: return s->jrx;
64: }
65:
66: void lm32_juart_set_jtx(DeviceState *d, uint32_t jtx)
67: {
68: LM32JuartState *s = container_of(d, LM32JuartState, busdev.qdev);
69: unsigned char ch = jtx & 0xff;
70:
71: trace_lm32_juart_set_jtx(s->jtx);
72:
73: s->jtx = jtx;
74: if (s->chr) {
1.1.1.2 root 75: qemu_chr_fe_write(s->chr, &ch, 1);
1.1 root 76: }
77: }
78:
79: void lm32_juart_set_jrx(DeviceState *d, uint32_t jtx)
80: {
81: LM32JuartState *s = container_of(d, LM32JuartState, busdev.qdev);
82:
83: trace_lm32_juart_set_jrx(s->jrx);
84: s->jrx &= ~JRX_FULL;
85: }
86:
87: static void juart_rx(void *opaque, const uint8_t *buf, int size)
88: {
89: LM32JuartState *s = opaque;
90:
91: s->jrx = *buf | JRX_FULL;
92: }
93:
94: static int juart_can_rx(void *opaque)
95: {
96: LM32JuartState *s = opaque;
97:
98: return !(s->jrx & JRX_FULL);
99: }
100:
101: static void juart_event(void *opaque, int event)
102: {
103: }
104:
105: static void juart_reset(DeviceState *d)
106: {
107: LM32JuartState *s = container_of(d, LM32JuartState, busdev.qdev);
108:
109: s->jtx = 0;
110: s->jrx = 0;
111: }
112:
113: static int lm32_juart_init(SysBusDevice *dev)
114: {
115: LM32JuartState *s = FROM_SYSBUS(typeof(*s), dev);
116:
1.1.1.3 ! root 117: s->chr = qemu_char_get_next_serial();
1.1 root 118: if (s->chr) {
119: qemu_chr_add_handlers(s->chr, juart_can_rx, juart_rx, juart_event, s);
120: }
121:
122: return 0;
123: }
124:
125: static const VMStateDescription vmstate_lm32_juart = {
126: .name = "lm32-juart",
127: .version_id = 1,
128: .minimum_version_id = 1,
129: .minimum_version_id_old = 1,
130: .fields = (VMStateField[]) {
131: VMSTATE_UINT32(jtx, LM32JuartState),
132: VMSTATE_UINT32(jrx, LM32JuartState),
133: VMSTATE_END_OF_LIST()
134: }
135: };
136:
1.1.1.3 ! root 137: static void lm32_juart_class_init(ObjectClass *klass, void *data)
! 138: {
! 139: DeviceClass *dc = DEVICE_CLASS(klass);
! 140: SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);
! 141:
! 142: k->init = lm32_juart_init;
! 143: dc->reset = juart_reset;
! 144: dc->vmsd = &vmstate_lm32_juart;
! 145: }
! 146:
! 147: static TypeInfo lm32_juart_info = {
! 148: .name = "lm32-juart",
! 149: .parent = TYPE_SYS_BUS_DEVICE,
! 150: .instance_size = sizeof(LM32JuartState),
! 151: .class_init = lm32_juart_class_init,
1.1 root 152: };
153:
1.1.1.3 ! root 154: static void lm32_juart_register_types(void)
1.1 root 155: {
1.1.1.3 ! root 156: type_register_static(&lm32_juart_info);
1.1 root 157: }
158:
1.1.1.3 ! root 159: type_init(lm32_juart_register_types)
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