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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 *
7 * This code is licenced under the GNU GPL v2.
8 */
9#include "sysbus.h"
10#include "hw.h"
11#include "i2c.h"
12#include "sysbus.h"
13#include "audio/audio.h"
14
15#define MP_AUDIO_SIZE 0x00001000
16
17/* Audio register offsets */
18#define MP_AUDIO_PLAYBACK_MODE 0x00
19#define MP_AUDIO_CLOCK_DIV 0x18
20#define MP_AUDIO_IRQ_STATUS 0x20
21#define MP_AUDIO_IRQ_ENABLE 0x24
22#define MP_AUDIO_TX_START_LO 0x28
23#define MP_AUDIO_TX_THRESHOLD 0x2C
24#define MP_AUDIO_TX_STATUS 0x38
25#define MP_AUDIO_TX_START_HI 0x40
26
27/* Status register and IRQ enable bits */
28#define MP_AUDIO_TX_HALF (1 << 6)
29#define MP_AUDIO_TX_FULL (1 << 7)
30
31/* Playback mode bits */
32#define MP_AUDIO_16BIT_SAMPLE (1 << 0)
33#define MP_AUDIO_PLAYBACK_EN (1 << 7)
34#define MP_AUDIO_CLOCK_24MHZ (1 << 9)
35#define MP_AUDIO_MONO (1 << 14)
36
37#ifdef HAS_AUDIO
38typedef struct mv88w8618_audio_state {
39 SysBusDevice busdev;
40 qemu_irq irq;
41 uint32_t playback_mode;
42 uint32_t status;
43 uint32_t irq_enable;
Jan Kiszkad5b61dd2009-09-18 20:51:23 +020044 uint32_t phys_buf;
Andrzej Zaborowskief07b492009-08-23 15:44:15 +020045 uint32_t target_buffer;
Jan Kiszkad5b61dd2009-09-18 20:51:23 +020046 uint32_t threshold;
47 uint32_t play_pos;
48 uint32_t last_free;
Andrzej Zaborowskief07b492009-08-23 15:44:15 +020049 uint32_t clock_div;
50 DeviceState *wm;
51} mv88w8618_audio_state;
52
53static void mv88w8618_audio_callback(void *opaque, int free_out, int free_in)
54{
55 mv88w8618_audio_state *s = opaque;
56 int16_t *codec_buffer;
57 int8_t buf[4096];
58 int8_t *mem_buffer;
59 int pos, block_size;
60
Jan Kiszka49fedd02009-09-18 20:51:23 +020061 if (!(s->playback_mode & MP_AUDIO_PLAYBACK_EN)) {
Andrzej Zaborowskief07b492009-08-23 15:44:15 +020062 return;
Jan Kiszka49fedd02009-09-18 20:51:23 +020063 }
64 if (s->playback_mode & MP_AUDIO_16BIT_SAMPLE) {
Andrzej Zaborowskief07b492009-08-23 15:44:15 +020065 free_out <<= 1;
Jan Kiszka49fedd02009-09-18 20:51:23 +020066 }
67 if (!(s->playback_mode & MP_AUDIO_MONO)) {
Andrzej Zaborowskief07b492009-08-23 15:44:15 +020068 free_out <<= 1;
Jan Kiszka49fedd02009-09-18 20:51:23 +020069 }
Andrzej Zaborowskief07b492009-08-23 15:44:15 +020070 block_size = s->threshold / 2;
Jan Kiszka49fedd02009-09-18 20:51:23 +020071 if (free_out - s->last_free < block_size) {
Andrzej Zaborowskief07b492009-08-23 15:44:15 +020072 return;
Jan Kiszka49fedd02009-09-18 20:51:23 +020073 }
74 if (block_size > 4096) {
Andrzej Zaborowskief07b492009-08-23 15:44:15 +020075 return;
Jan Kiszka49fedd02009-09-18 20:51:23 +020076 }
Andrzej Zaborowskief07b492009-08-23 15:44:15 +020077 cpu_physical_memory_read(s->target_buffer + s->play_pos, (void *)buf,
78 block_size);
79 mem_buffer = buf;
80 if (s->playback_mode & MP_AUDIO_16BIT_SAMPLE) {
81 if (s->playback_mode & MP_AUDIO_MONO) {
82 codec_buffer = wm8750_dac_buffer(s->wm, block_size >> 1);
83 for (pos = 0; pos < block_size; pos += 2) {
84 *codec_buffer++ = *(int16_t *)mem_buffer;
85 *codec_buffer++ = *(int16_t *)mem_buffer;
86 mem_buffer += 2;
87 }
Jan Kiszka49fedd02009-09-18 20:51:23 +020088 } else {
Andrzej Zaborowskief07b492009-08-23 15:44:15 +020089 memcpy(wm8750_dac_buffer(s->wm, block_size >> 2),
90 (uint32_t *)mem_buffer, block_size);
Jan Kiszka49fedd02009-09-18 20:51:23 +020091 }
Andrzej Zaborowskief07b492009-08-23 15:44:15 +020092 } else {
93 if (s->playback_mode & MP_AUDIO_MONO) {
94 codec_buffer = wm8750_dac_buffer(s->wm, block_size);
95 for (pos = 0; pos < block_size; pos++) {
96 *codec_buffer++ = cpu_to_le16(256 * *mem_buffer);
97 *codec_buffer++ = cpu_to_le16(256 * *mem_buffer++);
98 }
99 } else {
100 codec_buffer = wm8750_dac_buffer(s->wm, block_size >> 1);
101 for (pos = 0; pos < block_size; pos += 2) {
102 *codec_buffer++ = cpu_to_le16(256 * *mem_buffer++);
103 *codec_buffer++ = cpu_to_le16(256 * *mem_buffer++);
104 }
105 }
106 }
107 wm8750_dac_commit(s->wm);
108
109 s->last_free = free_out - block_size;
110
111 if (s->play_pos == 0) {
112 s->status |= MP_AUDIO_TX_HALF;
113 s->play_pos = block_size;
114 } else {
115 s->status |= MP_AUDIO_TX_FULL;
116 s->play_pos = 0;
117 }
118
Jan Kiszka49fedd02009-09-18 20:51:23 +0200119 if (s->status & s->irq_enable) {
Andrzej Zaborowskief07b492009-08-23 15:44:15 +0200120 qemu_irq_raise(s->irq);
Jan Kiszka49fedd02009-09-18 20:51:23 +0200121 }
Andrzej Zaborowskief07b492009-08-23 15:44:15 +0200122}
123
124static void mv88w8618_audio_clock_update(mv88w8618_audio_state *s)
125{
126 int rate;
127
Jan Kiszka49fedd02009-09-18 20:51:23 +0200128 if (s->playback_mode & MP_AUDIO_CLOCK_24MHZ) {
Andrzej Zaborowskief07b492009-08-23 15:44:15 +0200129 rate = 24576000 / 64; /* 24.576MHz */
Jan Kiszka49fedd02009-09-18 20:51:23 +0200130 } else {
Andrzej Zaborowskief07b492009-08-23 15:44:15 +0200131 rate = 11289600 / 64; /* 11.2896MHz */
Jan Kiszka49fedd02009-09-18 20:51:23 +0200132 }
Andrzej Zaborowskief07b492009-08-23 15:44:15 +0200133 rate /= ((s->clock_div >> 8) & 0xff) + 1;
134
135 wm8750_set_bclk_in(s->wm, rate);
136}
137
Anthony Liguoric227f092009-10-01 16:12:16 -0500138static uint32_t mv88w8618_audio_read(void *opaque, target_phys_addr_t offset)
Andrzej Zaborowskief07b492009-08-23 15:44:15 +0200139{
140 mv88w8618_audio_state *s = opaque;
141
142 switch (offset) {
143 case MP_AUDIO_PLAYBACK_MODE:
144 return s->playback_mode;
145
146 case MP_AUDIO_CLOCK_DIV:
147 return s->clock_div;
148
149 case MP_AUDIO_IRQ_STATUS:
150 return s->status;
151
152 case MP_AUDIO_IRQ_ENABLE:
153 return s->irq_enable;
154
155 case MP_AUDIO_TX_STATUS:
156 return s->play_pos >> 2;
157
158 default:
159 return 0;
160 }
161}
162
Anthony Liguoric227f092009-10-01 16:12:16 -0500163static void mv88w8618_audio_write(void *opaque, target_phys_addr_t offset,
Andrzej Zaborowskief07b492009-08-23 15:44:15 +0200164 uint32_t value)
165{
166 mv88w8618_audio_state *s = opaque;
167
168 switch (offset) {
169 case MP_AUDIO_PLAYBACK_MODE:
170 if (value & MP_AUDIO_PLAYBACK_EN &&
171 !(s->playback_mode & MP_AUDIO_PLAYBACK_EN)) {
172 s->status = 0;
173 s->last_free = 0;
174 s->play_pos = 0;
175 }
176 s->playback_mode = value;
177 mv88w8618_audio_clock_update(s);
178 break;
179
180 case MP_AUDIO_CLOCK_DIV:
181 s->clock_div = value;
182 s->last_free = 0;
183 s->play_pos = 0;
184 mv88w8618_audio_clock_update(s);
185 break;
186
187 case MP_AUDIO_IRQ_STATUS:
188 s->status &= ~value;
189 break;
190
191 case MP_AUDIO_IRQ_ENABLE:
192 s->irq_enable = value;
Jan Kiszka49fedd02009-09-18 20:51:23 +0200193 if (s->status & s->irq_enable) {
Andrzej Zaborowskief07b492009-08-23 15:44:15 +0200194 qemu_irq_raise(s->irq);
Jan Kiszka49fedd02009-09-18 20:51:23 +0200195 }
Andrzej Zaborowskief07b492009-08-23 15:44:15 +0200196 break;
197
198 case MP_AUDIO_TX_START_LO:
199 s->phys_buf = (s->phys_buf & 0xFFFF0000) | (value & 0xFFFF);
200 s->target_buffer = s->phys_buf;
201 s->play_pos = 0;
202 s->last_free = 0;
203 break;
204
205 case MP_AUDIO_TX_THRESHOLD:
206 s->threshold = (value + 1) * 4;
207 break;
208
209 case MP_AUDIO_TX_START_HI:
210 s->phys_buf = (s->phys_buf & 0xFFFF) | (value << 16);
211 s->target_buffer = s->phys_buf;
212 s->play_pos = 0;
213 s->last_free = 0;
214 break;
215 }
216}
217
Jan Kiszkad5b61dd2009-09-18 20:51:23 +0200218static void mv88w8618_audio_reset(DeviceState *d)
Andrzej Zaborowskief07b492009-08-23 15:44:15 +0200219{
Jan Kiszkad5b61dd2009-09-18 20:51:23 +0200220 mv88w8618_audio_state *s = FROM_SYSBUS(mv88w8618_audio_state,
221 sysbus_from_qdev(d));
Andrzej Zaborowskief07b492009-08-23 15:44:15 +0200222
223 s->playback_mode = 0;
224 s->status = 0;
225 s->irq_enable = 0;
Jan Kiszka267c4842009-09-18 20:51:23 +0200226 s->clock_div = 0;
227 s->threshold = 0;
228 s->phys_buf = 0;
Andrzej Zaborowskief07b492009-08-23 15:44:15 +0200229}
230
Blue Swirld60efc62009-08-25 18:29:31 +0000231static CPUReadMemoryFunc * const mv88w8618_audio_readfn[] = {
Andrzej Zaborowskief07b492009-08-23 15:44:15 +0200232 mv88w8618_audio_read,
233 mv88w8618_audio_read,
234 mv88w8618_audio_read
235};
236
Blue Swirld60efc62009-08-25 18:29:31 +0000237static CPUWriteMemoryFunc * const mv88w8618_audio_writefn[] = {
Andrzej Zaborowskief07b492009-08-23 15:44:15 +0200238 mv88w8618_audio_write,
239 mv88w8618_audio_write,
240 mv88w8618_audio_write
241};
242
Gerd Hoffmann81a322d2009-08-14 10:36:05 +0200243static int mv88w8618_audio_init(SysBusDevice *dev)
Andrzej Zaborowskief07b492009-08-23 15:44:15 +0200244{
245 mv88w8618_audio_state *s = FROM_SYSBUS(mv88w8618_audio_state, dev);
246 int iomemtype;
247
248 sysbus_init_irq(dev, &s->irq);
249
250 wm8750_data_req_set(s->wm, mv88w8618_audio_callback, s);
251
252 iomemtype = cpu_register_io_memory(mv88w8618_audio_readfn,
253 mv88w8618_audio_writefn, s);
254 sysbus_init_mmio(dev, MP_AUDIO_SIZE, iomemtype);
255
Gerd Hoffmann81a322d2009-08-14 10:36:05 +0200256 return 0;
Andrzej Zaborowskief07b492009-08-23 15:44:15 +0200257}
258
Jan Kiszkad5b61dd2009-09-18 20:51:23 +0200259static const VMStateDescription mv88w8618_audio_vmsd = {
260 .name = "mv88w8618_audio",
261 .version_id = 1,
262 .minimum_version_id = 1,
263 .minimum_version_id_old = 1,
264 .fields = (VMStateField[]) {
265 VMSTATE_UINT32(playback_mode, mv88w8618_audio_state),
266 VMSTATE_UINT32(status, mv88w8618_audio_state),
267 VMSTATE_UINT32(irq_enable, mv88w8618_audio_state),
268 VMSTATE_UINT32(phys_buf, mv88w8618_audio_state),
269 VMSTATE_UINT32(target_buffer, mv88w8618_audio_state),
270 VMSTATE_UINT32(threshold, mv88w8618_audio_state),
271 VMSTATE_UINT32(play_pos, mv88w8618_audio_state),
272 VMSTATE_UINT32(last_free, mv88w8618_audio_state),
273 VMSTATE_UINT32(clock_div, mv88w8618_audio_state),
274 VMSTATE_END_OF_LIST()
275 }
276};
277
Andrzej Zaborowskief07b492009-08-23 15:44:15 +0200278static SysBusDeviceInfo mv88w8618_audio_info = {
279 .init = mv88w8618_audio_init,
280 .qdev.name = "mv88w8618_audio",
281 .qdev.size = sizeof(mv88w8618_audio_state),
Jan Kiszka267c4842009-09-18 20:51:23 +0200282 .qdev.reset = mv88w8618_audio_reset,
Jan Kiszkad5b61dd2009-09-18 20:51:23 +0200283 .qdev.vmsd = &mv88w8618_audio_vmsd,
Andrzej Zaborowskief07b492009-08-23 15:44:15 +0200284 .qdev.props = (Property[]) {
285 {
286 .name = "wm8750",
287 .info = &qdev_prop_ptr,
288 .offset = offsetof(mv88w8618_audio_state, wm),
289 },
290 {/* end of list */}
291 }
292};
293#endif
294
295static void mv88w8618_register_devices(void)
296{
297#ifdef HAS_AUDIO
298 sysbus_register_withprop(&mv88w8618_audio_info);
299#endif
300}
301
302device_init(mv88w8618_register_devices)