1
2
3
4
5
6
7
8
9
10
11
12
13#include "qemu/osdep.h"
14#include "hw/sysbus.h"
15#include "hw/hw.h"
16#include "hw/audio/wm8750.h"
17#include "audio/audio.h"
18#include "qapi/error.h"
19#include "qemu/module.h"
20
21#define MP_AUDIO_SIZE 0x00001000
22
23
24#define MP_AUDIO_PLAYBACK_MODE 0x00
25#define MP_AUDIO_CLOCK_DIV 0x18
26#define MP_AUDIO_IRQ_STATUS 0x20
27#define MP_AUDIO_IRQ_ENABLE 0x24
28#define MP_AUDIO_TX_START_LO 0x28
29#define MP_AUDIO_TX_THRESHOLD 0x2C
30#define MP_AUDIO_TX_STATUS 0x38
31#define MP_AUDIO_TX_START_HI 0x40
32
33
34#define MP_AUDIO_TX_HALF (1 << 6)
35#define MP_AUDIO_TX_FULL (1 << 7)
36
37
38#define MP_AUDIO_16BIT_SAMPLE (1 << 0)
39#define MP_AUDIO_PLAYBACK_EN (1 << 7)
40#define MP_AUDIO_CLOCK_24MHZ (1 << 9)
41#define MP_AUDIO_MONO (1 << 14)
42
43#define MV88W8618_AUDIO(obj) \
44 OBJECT_CHECK(mv88w8618_audio_state, (obj), TYPE_MV88W8618_AUDIO)
45
46typedef struct mv88w8618_audio_state {
47 SysBusDevice parent_obj;
48
49 MemoryRegion iomem;
50 qemu_irq irq;
51 uint32_t playback_mode;
52 uint32_t status;
53 uint32_t irq_enable;
54 uint32_t phys_buf;
55 uint32_t target_buffer;
56 uint32_t threshold;
57 uint32_t play_pos;
58 uint32_t last_free;
59 uint32_t clock_div;
60 void *wm;
61} mv88w8618_audio_state;
62
63static void mv88w8618_audio_callback(void *opaque, int free_out, int free_in)
64{
65 mv88w8618_audio_state *s = opaque;
66 int16_t *codec_buffer;
67 int8_t buf[4096];
68 int8_t *mem_buffer;
69 int pos, block_size;
70
71 if (!(s->playback_mode & MP_AUDIO_PLAYBACK_EN)) {
72 return;
73 }
74 if (s->playback_mode & MP_AUDIO_16BIT_SAMPLE) {
75 free_out <<= 1;
76 }
77 if (!(s->playback_mode & MP_AUDIO_MONO)) {
78 free_out <<= 1;
79 }
80 block_size = s->threshold / 2;
81 if (free_out - s->last_free < block_size) {
82 return;
83 }
84 if (block_size > 4096) {
85 return;
86 }
87 cpu_physical_memory_read(s->target_buffer + s->play_pos, buf, block_size);
88 mem_buffer = buf;
89 if (s->playback_mode & MP_AUDIO_16BIT_SAMPLE) {
90 if (s->playback_mode & MP_AUDIO_MONO) {
91 codec_buffer = wm8750_dac_buffer(s->wm, block_size >> 1);
92 for (pos = 0; pos < block_size; pos += 2) {
93 *codec_buffer++ = *(int16_t *)mem_buffer;
94 *codec_buffer++ = *(int16_t *)mem_buffer;
95 mem_buffer += 2;
96 }
97 } else {
98 memcpy(wm8750_dac_buffer(s->wm, block_size >> 2),
99 (uint32_t *)mem_buffer, block_size);
100 }
101 } else {
102 if (s->playback_mode & MP_AUDIO_MONO) {
103 codec_buffer = wm8750_dac_buffer(s->wm, block_size);
104 for (pos = 0; pos < block_size; pos++) {
105 *codec_buffer++ = cpu_to_le16(256 * *mem_buffer);
106 *codec_buffer++ = cpu_to_le16(256 * *mem_buffer++);
107 }
108 } else {
109 codec_buffer = wm8750_dac_buffer(s->wm, block_size >> 1);
110 for (pos = 0; pos < block_size; pos += 2) {
111 *codec_buffer++ = cpu_to_le16(256 * *mem_buffer++);
112 *codec_buffer++ = cpu_to_le16(256 * *mem_buffer++);
113 }
114 }
115 }
116 wm8750_dac_commit(s->wm);
117
118 s->last_free = free_out - block_size;
119
120 if (s->play_pos == 0) {
121 s->status |= MP_AUDIO_TX_HALF;
122 s->play_pos = block_size;
123 } else {
124 s->status |= MP_AUDIO_TX_FULL;
125 s->play_pos = 0;
126 }
127
128 if (s->status & s->irq_enable) {
129 qemu_irq_raise(s->irq);
130 }
131}
132
133static void mv88w8618_audio_clock_update(mv88w8618_audio_state *s)
134{
135 int rate;
136
137 if (s->playback_mode & MP_AUDIO_CLOCK_24MHZ) {
138 rate = 24576000 / 64;
139 } else {
140 rate = 11289600 / 64;
141 }
142 rate /= ((s->clock_div >> 8) & 0xff) + 1;
143
144 wm8750_set_bclk_in(s->wm, rate);
145}
146
147static uint64_t mv88w8618_audio_read(void *opaque, hwaddr offset,
148 unsigned size)
149{
150 mv88w8618_audio_state *s = opaque;
151
152 switch (offset) {
153 case MP_AUDIO_PLAYBACK_MODE:
154 return s->playback_mode;
155
156 case MP_AUDIO_CLOCK_DIV:
157 return s->clock_div;
158
159 case MP_AUDIO_IRQ_STATUS:
160 return s->status;
161
162 case MP_AUDIO_IRQ_ENABLE:
163 return s->irq_enable;
164
165 case MP_AUDIO_TX_STATUS:
166 return s->play_pos >> 2;
167
168 default:
169 return 0;
170 }
171}
172
173static void mv88w8618_audio_write(void *opaque, hwaddr offset,
174 uint64_t value, unsigned size)
175{
176 mv88w8618_audio_state *s = opaque;
177
178 switch (offset) {
179 case MP_AUDIO_PLAYBACK_MODE:
180 if (value & MP_AUDIO_PLAYBACK_EN &&
181 !(s->playback_mode & MP_AUDIO_PLAYBACK_EN)) {
182 s->status = 0;
183 s->last_free = 0;
184 s->play_pos = 0;
185 }
186 s->playback_mode = value;
187 mv88w8618_audio_clock_update(s);
188 break;
189
190 case MP_AUDIO_CLOCK_DIV:
191 s->clock_div = value;
192 s->last_free = 0;
193 s->play_pos = 0;
194 mv88w8618_audio_clock_update(s);
195 break;
196
197 case MP_AUDIO_IRQ_STATUS:
198 s->status &= ~value;
199 break;
200
201 case MP_AUDIO_IRQ_ENABLE:
202 s->irq_enable = value;
203 if (s->status & s->irq_enable) {
204 qemu_irq_raise(s->irq);
205 }
206 break;
207
208 case MP_AUDIO_TX_START_LO:
209 s->phys_buf = (s->phys_buf & 0xFFFF0000) | (value & 0xFFFF);
210 s->target_buffer = s->phys_buf;
211 s->play_pos = 0;
212 s->last_free = 0;
213 break;
214
215 case MP_AUDIO_TX_THRESHOLD:
216 s->threshold = (value + 1) * 4;
217 break;
218
219 case MP_AUDIO_TX_START_HI:
220 s->phys_buf = (s->phys_buf & 0xFFFF) | (value << 16);
221 s->target_buffer = s->phys_buf;
222 s->play_pos = 0;
223 s->last_free = 0;
224 break;
225 }
226}
227
228static void mv88w8618_audio_reset(DeviceState *d)
229{
230 mv88w8618_audio_state *s = MV88W8618_AUDIO(d);
231
232 s->playback_mode = 0;
233 s->status = 0;
234 s->irq_enable = 0;
235 s->clock_div = 0;
236 s->threshold = 0;
237 s->phys_buf = 0;
238}
239
240static const MemoryRegionOps mv88w8618_audio_ops = {
241 .read = mv88w8618_audio_read,
242 .write = mv88w8618_audio_write,
243 .endianness = DEVICE_NATIVE_ENDIAN,
244};
245
246static void mv88w8618_audio_init(Object *obj)
247{
248 SysBusDevice *dev = SYS_BUS_DEVICE(obj);
249 mv88w8618_audio_state *s = MV88W8618_AUDIO(dev);
250
251 sysbus_init_irq(dev, &s->irq);
252
253 memory_region_init_io(&s->iomem, obj, &mv88w8618_audio_ops, s,
254 "audio", MP_AUDIO_SIZE);
255 sysbus_init_mmio(dev, &s->iomem);
256
257 object_property_add_link(OBJECT(dev), "wm8750", TYPE_WM8750,
258 (Object **) &s->wm,
259 qdev_prop_allow_set_link_before_realize,
260 0, &error_abort);
261}
262
263static void mv88w8618_audio_realize(DeviceState *dev, Error **errp)
264{
265 mv88w8618_audio_state *s = MV88W8618_AUDIO(dev);
266
267 wm8750_data_req_set(s->wm, mv88w8618_audio_callback, s);
268}
269
270static const VMStateDescription mv88w8618_audio_vmsd = {
271 .name = "mv88w8618_audio",
272 .version_id = 1,
273 .minimum_version_id = 1,
274 .fields = (VMStateField[]) {
275 VMSTATE_UINT32(playback_mode, mv88w8618_audio_state),
276 VMSTATE_UINT32(status, mv88w8618_audio_state),
277 VMSTATE_UINT32(irq_enable, mv88w8618_audio_state),
278 VMSTATE_UINT32(phys_buf, mv88w8618_audio_state),
279 VMSTATE_UINT32(target_buffer, mv88w8618_audio_state),
280 VMSTATE_UINT32(threshold, mv88w8618_audio_state),
281 VMSTATE_UINT32(play_pos, mv88w8618_audio_state),
282 VMSTATE_UINT32(last_free, mv88w8618_audio_state),
283 VMSTATE_UINT32(clock_div, mv88w8618_audio_state),
284 VMSTATE_END_OF_LIST()
285 }
286};
287
288static void mv88w8618_audio_class_init(ObjectClass *klass, void *data)
289{
290 DeviceClass *dc = DEVICE_CLASS(klass);
291
292 dc->realize = mv88w8618_audio_realize;
293 dc->reset = mv88w8618_audio_reset;
294 dc->vmsd = &mv88w8618_audio_vmsd;
295 dc->user_creatable = false;
296}
297
298static const TypeInfo mv88w8618_audio_info = {
299 .name = TYPE_MV88W8618_AUDIO,
300 .parent = TYPE_SYS_BUS_DEVICE,
301 .instance_size = sizeof(mv88w8618_audio_state),
302 .instance_init = mv88w8618_audio_init,
303 .class_init = mv88w8618_audio_class_init,
304};
305
306static void mv88w8618_register_types(void)
307{
308 type_register_static(&mv88w8618_audio_info);
309}
310
311type_init(mv88w8618_register_types)
312
