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Andrzej Zaborowskief07b492009-08-23 15:44:15 +02001/*
2 * Marvell 88w8618 audio emulation extracted from
3 * Marvell MV88w8618 / Freecom MusicPal emulation.
4 *
5 * Copyright (c) 2008 Jan Kiszka
6 *
Matthew Fernandez8e31bf32011-06-26 12:21:35 +10007 * This code is licensed under the GNU GPL v2.
Paolo Bonzini6b620ca2012-01-13 17:44:23 +01008 *
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.
Andrzej Zaborowskief07b492009-08-23 15:44:15 +020011 */
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
Andrzej Zaborowskief07b492009-08-23 15:44:15 +020040typedef struct mv88w8618_audio_state {
41 SysBusDevice busdev;
Benoît Canete2ba99e2011-10-25 12:32:35 +020042 MemoryRegion iomem;
Andrzej Zaborowskief07b492009-08-23 15:44:15 +020043 qemu_irq irq;
44 uint32_t playback_mode;
45 uint32_t status;
46 uint32_t irq_enable;
Jan Kiszkad5b61dd2009-09-18 20:51:23 +020047 uint32_t phys_buf;
Andrzej Zaborowskief07b492009-08-23 15:44:15 +020048 uint32_t target_buffer;
Jan Kiszkad5b61dd2009-09-18 20:51:23 +020049 uint32_t threshold;
50 uint32_t play_pos;
51 uint32_t last_free;
Andrzej Zaborowskief07b492009-08-23 15:44:15 +020052 uint32_t clock_div;
Anthony Liguorie8557612011-12-06 19:32:44 -060053 void *wm;
Andrzej Zaborowskief07b492009-08-23 15:44:15 +020054} mv88w8618_audio_state;
55
56static 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
Jan Kiszka49fedd02009-09-18 20:51:23 +020064 if (!(s->playback_mode & MP_AUDIO_PLAYBACK_EN)) {
Andrzej Zaborowskief07b492009-08-23 15:44:15 +020065 return;
Jan Kiszka49fedd02009-09-18 20:51:23 +020066 }
67 if (s->playback_mode & MP_AUDIO_16BIT_SAMPLE) {
Andrzej Zaborowskief07b492009-08-23 15:44:15 +020068 free_out <<= 1;
Jan Kiszka49fedd02009-09-18 20:51:23 +020069 }
70 if (!(s->playback_mode & MP_AUDIO_MONO)) {
Andrzej Zaborowskief07b492009-08-23 15:44:15 +020071 free_out <<= 1;
Jan Kiszka49fedd02009-09-18 20:51:23 +020072 }
Andrzej Zaborowskief07b492009-08-23 15:44:15 +020073 block_size = s->threshold / 2;
Jan Kiszka49fedd02009-09-18 20:51:23 +020074 if (free_out - s->last_free < block_size) {
Andrzej Zaborowskief07b492009-08-23 15:44:15 +020075 return;
Jan Kiszka49fedd02009-09-18 20:51:23 +020076 }
77 if (block_size > 4096) {
Andrzej Zaborowskief07b492009-08-23 15:44:15 +020078 return;
Jan Kiszka49fedd02009-09-18 20:51:23 +020079 }
Andrzej Zaborowskief07b492009-08-23 15:44:15 +020080 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 }
Jan Kiszka49fedd02009-09-18 20:51:23 +020091 } else {
Andrzej Zaborowskief07b492009-08-23 15:44:15 +020092 memcpy(wm8750_dac_buffer(s->wm, block_size >> 2),
93 (uint32_t *)mem_buffer, block_size);
Jan Kiszka49fedd02009-09-18 20:51:23 +020094 }
Andrzej Zaborowskief07b492009-08-23 15:44:15 +020095 } 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
Jan Kiszka49fedd02009-09-18 20:51:23 +0200122 if (s->status & s->irq_enable) {
Andrzej Zaborowskief07b492009-08-23 15:44:15 +0200123 qemu_irq_raise(s->irq);
Jan Kiszka49fedd02009-09-18 20:51:23 +0200124 }
Andrzej Zaborowskief07b492009-08-23 15:44:15 +0200125}
126
127static void mv88w8618_audio_clock_update(mv88w8618_audio_state *s)
128{
129 int rate;
130
Jan Kiszka49fedd02009-09-18 20:51:23 +0200131 if (s->playback_mode & MP_AUDIO_CLOCK_24MHZ) {
Andrzej Zaborowskief07b492009-08-23 15:44:15 +0200132 rate = 24576000 / 64; /* 24.576MHz */
Jan Kiszka49fedd02009-09-18 20:51:23 +0200133 } else {
Andrzej Zaborowskief07b492009-08-23 15:44:15 +0200134 rate = 11289600 / 64; /* 11.2896MHz */
Jan Kiszka49fedd02009-09-18 20:51:23 +0200135 }
Andrzej Zaborowskief07b492009-08-23 15:44:15 +0200136 rate /= ((s->clock_div >> 8) & 0xff) + 1;
137
138 wm8750_set_bclk_in(s->wm, rate);
139}
140
Benoît Canete2ba99e2011-10-25 12:32:35 +0200141static uint64_t mv88w8618_audio_read(void *opaque, target_phys_addr_t offset,
142 unsigned size)
Andrzej Zaborowskief07b492009-08-23 15:44:15 +0200143{
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
Anthony Liguoric227f092009-10-01 16:12:16 -0500167static void mv88w8618_audio_write(void *opaque, target_phys_addr_t offset,
Benoît Canete2ba99e2011-10-25 12:32:35 +0200168 uint64_t value, unsigned size)
Andrzej Zaborowskief07b492009-08-23 15:44:15 +0200169{
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;
Jan Kiszka49fedd02009-09-18 20:51:23 +0200197 if (s->status & s->irq_enable) {
Andrzej Zaborowskief07b492009-08-23 15:44:15 +0200198 qemu_irq_raise(s->irq);
Jan Kiszka49fedd02009-09-18 20:51:23 +0200199 }
Andrzej Zaborowskief07b492009-08-23 15:44:15 +0200200 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
Jan Kiszkad5b61dd2009-09-18 20:51:23 +0200222static void mv88w8618_audio_reset(DeviceState *d)
Andrzej Zaborowskief07b492009-08-23 15:44:15 +0200223{
Jan Kiszkad5b61dd2009-09-18 20:51:23 +0200224 mv88w8618_audio_state *s = FROM_SYSBUS(mv88w8618_audio_state,
225 sysbus_from_qdev(d));
Andrzej Zaborowskief07b492009-08-23 15:44:15 +0200226
227 s->playback_mode = 0;
228 s->status = 0;
229 s->irq_enable = 0;
Jan Kiszka267c4842009-09-18 20:51:23 +0200230 s->clock_div = 0;
231 s->threshold = 0;
232 s->phys_buf = 0;
Andrzej Zaborowskief07b492009-08-23 15:44:15 +0200233}
234
Benoît Canete2ba99e2011-10-25 12:32:35 +0200235static const MemoryRegionOps mv88w8618_audio_ops = {
236 .read = mv88w8618_audio_read,
237 .write = mv88w8618_audio_write,
238 .endianness = DEVICE_NATIVE_ENDIAN,
Andrzej Zaborowskief07b492009-08-23 15:44:15 +0200239};
240
Gerd Hoffmann81a322d2009-08-14 10:36:05 +0200241static int mv88w8618_audio_init(SysBusDevice *dev)
Andrzej Zaborowskief07b492009-08-23 15:44:15 +0200242{
243 mv88w8618_audio_state *s = FROM_SYSBUS(mv88w8618_audio_state, dev);
Andrzej Zaborowskief07b492009-08-23 15:44:15 +0200244
245 sysbus_init_irq(dev, &s->irq);
246
247 wm8750_data_req_set(s->wm, mv88w8618_audio_callback, s);
248
Benoît Canete2ba99e2011-10-25 12:32:35 +0200249 memory_region_init_io(&s->iomem, &mv88w8618_audio_ops, s,
250 "audio", MP_AUDIO_SIZE);
Avi Kivity750ecd42011-11-27 11:38:10 +0200251 sysbus_init_mmio(dev, &s->iomem);
Andrzej Zaborowskief07b492009-08-23 15:44:15 +0200252
Gerd Hoffmann81a322d2009-08-14 10:36:05 +0200253 return 0;
Andrzej Zaborowskief07b492009-08-23 15:44:15 +0200254}
255
Jan Kiszkad5b61dd2009-09-18 20:51:23 +0200256static 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
Anthony Liguori999e12b2012-01-24 13:12:29 -0600275static Property mv88w8618_audio_properties[] = {
276 DEFINE_PROP_PTR("wm8750", mv88w8618_audio_state, wm),
277 {/* end of list */},
278};
279
280static void mv88w8618_audio_class_init(ObjectClass *klass, void *data)
281{
Anthony Liguori39bffca2011-12-07 21:34:16 -0600282 DeviceClass *dc = DEVICE_CLASS(klass);
Anthony Liguori999e12b2012-01-24 13:12:29 -0600283 SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);
284
285 k->init = mv88w8618_audio_init;
Anthony Liguori39bffca2011-12-07 21:34:16 -0600286 dc->reset = mv88w8618_audio_reset;
287 dc->vmsd = &mv88w8618_audio_vmsd;
288 dc->props = mv88w8618_audio_properties;
Anthony Liguori999e12b2012-01-24 13:12:29 -0600289}
290
Anthony Liguori39bffca2011-12-07 21:34:16 -0600291static TypeInfo mv88w8618_audio_info = {
292 .name = "mv88w8618_audio",
293 .parent = TYPE_SYS_BUS_DEVICE,
294 .instance_size = sizeof(mv88w8618_audio_state),
295 .class_init = mv88w8618_audio_class_init,
Andrzej Zaborowskief07b492009-08-23 15:44:15 +0200296};
Andrzej Zaborowskief07b492009-08-23 15:44:15 +0200297
Andreas Färber83f7d432012-02-09 15:20:55 +0100298static void mv88w8618_register_types(void)
Andrzej Zaborowskief07b492009-08-23 15:44:15 +0200299{
Anthony Liguori39bffca2011-12-07 21:34:16 -0600300 type_register_static(&mv88w8618_audio_info);
Andrzej Zaborowskief07b492009-08-23 15:44:15 +0200301}
302
Andreas Färber83f7d432012-02-09 15:20:55 +0100303type_init(mv88w8618_register_types)