PPC: e500: msync is 440 only, e500 has real sync
[qemu.git] / hw / marvell_88w8618_audio.c
1 /*
2 * Marvell 88w8618 audio emulation extracted from
3 * Marvell MV88w8618 / Freecom MusicPal emulation.
4 *
5 * Copyright (c) 2008 Jan Kiszka
6 *
7 * This code is licensed under the GNU GPL v2.
8 *
9 * Contributions after 2012-01-13 are licensed under the terms of the
10 * GNU GPL, version 2 or (at your option) any later version.
11 */
12 #include "sysbus.h"
13 #include "hw.h"
14 #include "i2c.h"
15 #include "sysbus.h"
16 #include "audio/audio.h"
17
18 #define MP_AUDIO_SIZE 0x00001000
19
20 /* Audio register offsets */
21 #define MP_AUDIO_PLAYBACK_MODE 0x00
22 #define MP_AUDIO_CLOCK_DIV 0x18
23 #define MP_AUDIO_IRQ_STATUS 0x20
24 #define MP_AUDIO_IRQ_ENABLE 0x24
25 #define MP_AUDIO_TX_START_LO 0x28
26 #define MP_AUDIO_TX_THRESHOLD 0x2C
27 #define MP_AUDIO_TX_STATUS 0x38
28 #define MP_AUDIO_TX_START_HI 0x40
29
30 /* Status register and IRQ enable bits */
31 #define MP_AUDIO_TX_HALF (1 << 6)
32 #define MP_AUDIO_TX_FULL (1 << 7)
33
34 /* Playback mode bits */
35 #define MP_AUDIO_16BIT_SAMPLE (1 << 0)
36 #define MP_AUDIO_PLAYBACK_EN (1 << 7)
37 #define MP_AUDIO_CLOCK_24MHZ (1 << 9)
38 #define MP_AUDIO_MONO (1 << 14)
39
40 typedef struct mv88w8618_audio_state {
41 SysBusDevice busdev;
42 MemoryRegion iomem;
43 qemu_irq irq;
44 uint32_t playback_mode;
45 uint32_t status;
46 uint32_t irq_enable;
47 uint32_t phys_buf;
48 uint32_t target_buffer;
49 uint32_t threshold;
50 uint32_t play_pos;
51 uint32_t last_free;
52 uint32_t clock_div;
53 void *wm;
54 } mv88w8618_audio_state;
55
56 static void mv88w8618_audio_callback(void *opaque, int free_out, int free_in)
57 {
58 mv88w8618_audio_state *s = opaque;
59 int16_t *codec_buffer;
60 int8_t buf[4096];
61 int8_t *mem_buffer;
62 int pos, block_size;
63
64 if (!(s->playback_mode & MP_AUDIO_PLAYBACK_EN)) {
65 return;
66 }
67 if (s->playback_mode & MP_AUDIO_16BIT_SAMPLE) {
68 free_out <<= 1;
69 }
70 if (!(s->playback_mode & MP_AUDIO_MONO)) {
71 free_out <<= 1;
72 }
73 block_size = s->threshold / 2;
74 if (free_out - s->last_free < block_size) {
75 return;
76 }
77 if (block_size > 4096) {
78 return;
79 }
80 cpu_physical_memory_read(s->target_buffer + s->play_pos, (void *)buf,
81 block_size);
82 mem_buffer = buf;
83 if (s->playback_mode & MP_AUDIO_16BIT_SAMPLE) {
84 if (s->playback_mode & MP_AUDIO_MONO) {
85 codec_buffer = wm8750_dac_buffer(s->wm, block_size >> 1);
86 for (pos = 0; pos < block_size; pos += 2) {
87 *codec_buffer++ = *(int16_t *)mem_buffer;
88 *codec_buffer++ = *(int16_t *)mem_buffer;
89 mem_buffer += 2;
90 }
91 } else {
92 memcpy(wm8750_dac_buffer(s->wm, block_size >> 2),
93 (uint32_t *)mem_buffer, block_size);
94 }
95 } else {
96 if (s->playback_mode & MP_AUDIO_MONO) {
97 codec_buffer = wm8750_dac_buffer(s->wm, block_size);
98 for (pos = 0; pos < block_size; pos++) {
99 *codec_buffer++ = cpu_to_le16(256 * *mem_buffer);
100 *codec_buffer++ = cpu_to_le16(256 * *mem_buffer++);
101 }
102 } else {
103 codec_buffer = wm8750_dac_buffer(s->wm, block_size >> 1);
104 for (pos = 0; pos < block_size; pos += 2) {
105 *codec_buffer++ = cpu_to_le16(256 * *mem_buffer++);
106 *codec_buffer++ = cpu_to_le16(256 * *mem_buffer++);
107 }
108 }
109 }
110 wm8750_dac_commit(s->wm);
111
112 s->last_free = free_out - block_size;
113
114 if (s->play_pos == 0) {
115 s->status |= MP_AUDIO_TX_HALF;
116 s->play_pos = block_size;
117 } else {
118 s->status |= MP_AUDIO_TX_FULL;
119 s->play_pos = 0;
120 }
121
122 if (s->status & s->irq_enable) {
123 qemu_irq_raise(s->irq);
124 }
125 }
126
127 static void mv88w8618_audio_clock_update(mv88w8618_audio_state *s)
128 {
129 int rate;
130
131 if (s->playback_mode & MP_AUDIO_CLOCK_24MHZ) {
132 rate = 24576000 / 64; /* 24.576MHz */
133 } else {
134 rate = 11289600 / 64; /* 11.2896MHz */
135 }
136 rate /= ((s->clock_div >> 8) & 0xff) + 1;
137
138 wm8750_set_bclk_in(s->wm, rate);
139 }
140
141 static uint64_t mv88w8618_audio_read(void *opaque, target_phys_addr_t offset,
142 unsigned size)
143 {
144 mv88w8618_audio_state *s = opaque;
145
146 switch (offset) {
147 case MP_AUDIO_PLAYBACK_MODE:
148 return s->playback_mode;
149
150 case MP_AUDIO_CLOCK_DIV:
151 return s->clock_div;
152
153 case MP_AUDIO_IRQ_STATUS:
154 return s->status;
155
156 case MP_AUDIO_IRQ_ENABLE:
157 return s->irq_enable;
158
159 case MP_AUDIO_TX_STATUS:
160 return s->play_pos >> 2;
161
162 default:
163 return 0;
164 }
165 }
166
167 static void mv88w8618_audio_write(void *opaque, target_phys_addr_t offset,
168 uint64_t value, unsigned size)
169 {
170 mv88w8618_audio_state *s = opaque;
171
172 switch (offset) {
173 case MP_AUDIO_PLAYBACK_MODE:
174 if (value & MP_AUDIO_PLAYBACK_EN &&
175 !(s->playback_mode & MP_AUDIO_PLAYBACK_EN)) {
176 s->status = 0;
177 s->last_free = 0;
178 s->play_pos = 0;
179 }
180 s->playback_mode = value;
181 mv88w8618_audio_clock_update(s);
182 break;
183
184 case MP_AUDIO_CLOCK_DIV:
185 s->clock_div = value;
186 s->last_free = 0;
187 s->play_pos = 0;
188 mv88w8618_audio_clock_update(s);
189 break;
190
191 case MP_AUDIO_IRQ_STATUS:
192 s->status &= ~value;
193 break;
194
195 case MP_AUDIO_IRQ_ENABLE:
196 s->irq_enable = value;
197 if (s->status & s->irq_enable) {
198 qemu_irq_raise(s->irq);
199 }
200 break;
201
202 case MP_AUDIO_TX_START_LO:
203 s->phys_buf = (s->phys_buf & 0xFFFF0000) | (value & 0xFFFF);
204 s->target_buffer = s->phys_buf;
205 s->play_pos = 0;
206 s->last_free = 0;
207 break;
208
209 case MP_AUDIO_TX_THRESHOLD:
210 s->threshold = (value + 1) * 4;
211 break;
212
213 case MP_AUDIO_TX_START_HI:
214 s->phys_buf = (s->phys_buf & 0xFFFF) | (value << 16);
215 s->target_buffer = s->phys_buf;
216 s->play_pos = 0;
217 s->last_free = 0;
218 break;
219 }
220 }
221
222 static void mv88w8618_audio_reset(DeviceState *d)
223 {
224 mv88w8618_audio_state *s = FROM_SYSBUS(mv88w8618_audio_state,
225 sysbus_from_qdev(d));
226
227 s->playback_mode = 0;
228 s->status = 0;
229 s->irq_enable = 0;
230 s->clock_div = 0;
231 s->threshold = 0;
232 s->phys_buf = 0;
233 }
234
235 static const MemoryRegionOps mv88w8618_audio_ops = {
236 .read = mv88w8618_audio_read,
237 .write = mv88w8618_audio_write,
238 .endianness = DEVICE_NATIVE_ENDIAN,
239 };
240
241 static int mv88w8618_audio_init(SysBusDevice *dev)
242 {
243 mv88w8618_audio_state *s = FROM_SYSBUS(mv88w8618_audio_state, dev);
244
245 sysbus_init_irq(dev, &s->irq);
246
247 wm8750_data_req_set(s->wm, mv88w8618_audio_callback, s);
248
249 memory_region_init_io(&s->iomem, &mv88w8618_audio_ops, s,
250 "audio", MP_AUDIO_SIZE);
251 sysbus_init_mmio(dev, &s->iomem);
252
253 return 0;
254 }
255
256 static const VMStateDescription mv88w8618_audio_vmsd = {
257 .name = "mv88w8618_audio",
258 .version_id = 1,
259 .minimum_version_id = 1,
260 .minimum_version_id_old = 1,
261 .fields = (VMStateField[]) {
262 VMSTATE_UINT32(playback_mode, mv88w8618_audio_state),
263 VMSTATE_UINT32(status, mv88w8618_audio_state),
264 VMSTATE_UINT32(irq_enable, mv88w8618_audio_state),
265 VMSTATE_UINT32(phys_buf, mv88w8618_audio_state),
266 VMSTATE_UINT32(target_buffer, mv88w8618_audio_state),
267 VMSTATE_UINT32(threshold, mv88w8618_audio_state),
268 VMSTATE_UINT32(play_pos, mv88w8618_audio_state),
269 VMSTATE_UINT32(last_free, mv88w8618_audio_state),
270 VMSTATE_UINT32(clock_div, mv88w8618_audio_state),
271 VMSTATE_END_OF_LIST()
272 }
273 };
274
275 static Property mv88w8618_audio_properties[] = {
276 DEFINE_PROP_PTR("wm8750", mv88w8618_audio_state, wm),
277 {/* end of list */},
278 };
279
280 static void mv88w8618_audio_class_init(ObjectClass *klass, void *data)
281 {
282 SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);
283
284 k->init = mv88w8618_audio_init;
285 }
286
287 static DeviceInfo mv88w8618_audio_info = {
288 .name = "mv88w8618_audio",
289 .size = sizeof(mv88w8618_audio_state),
290 .reset = mv88w8618_audio_reset,
291 .vmsd = &mv88w8618_audio_vmsd,
292 .props = mv88w8618_audio_properties,
293 .class_init = mv88w8618_audio_class_init,
294 };
295
296 static void mv88w8618_register_devices(void)
297 {
298 sysbus_register_withprop(&mv88w8618_audio_info);
299 }
300
301 device_init(mv88w8618_register_devices)