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ef07b491 AZ |
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 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 | |
38 | typedef 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; | |
d5b61ddd | 44 | uint32_t phys_buf; |
ef07b491 | 45 | uint32_t target_buffer; |
d5b61ddd JK |
46 | uint32_t threshold; |
47 | uint32_t play_pos; | |
48 | uint32_t last_free; | |
ef07b491 AZ |
49 | uint32_t clock_div; |
50 | DeviceState *wm; | |
51 | } mv88w8618_audio_state; | |
52 | ||
53 | static 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 | ||
49fedd0d | 61 | if (!(s->playback_mode & MP_AUDIO_PLAYBACK_EN)) { |
ef07b491 | 62 | return; |
49fedd0d JK |
63 | } |
64 | if (s->playback_mode & MP_AUDIO_16BIT_SAMPLE) { | |
ef07b491 | 65 | free_out <<= 1; |
49fedd0d JK |
66 | } |
67 | if (!(s->playback_mode & MP_AUDIO_MONO)) { | |
ef07b491 | 68 | free_out <<= 1; |
49fedd0d | 69 | } |
ef07b491 | 70 | block_size = s->threshold / 2; |
49fedd0d | 71 | if (free_out - s->last_free < block_size) { |
ef07b491 | 72 | return; |
49fedd0d JK |
73 | } |
74 | if (block_size > 4096) { | |
ef07b491 | 75 | return; |
49fedd0d | 76 | } |
ef07b491 AZ |
77 | 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 | } | |
49fedd0d | 88 | } else { |
ef07b491 AZ |
89 | memcpy(wm8750_dac_buffer(s->wm, block_size >> 2), |
90 | (uint32_t *)mem_buffer, block_size); | |
49fedd0d | 91 | } |
ef07b491 AZ |
92 | } 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 | ||
49fedd0d | 119 | if (s->status & s->irq_enable) { |
ef07b491 | 120 | qemu_irq_raise(s->irq); |
49fedd0d | 121 | } |
ef07b491 AZ |
122 | } |
123 | ||
124 | static void mv88w8618_audio_clock_update(mv88w8618_audio_state *s) | |
125 | { | |
126 | int rate; | |
127 | ||
49fedd0d | 128 | if (s->playback_mode & MP_AUDIO_CLOCK_24MHZ) { |
ef07b491 | 129 | rate = 24576000 / 64; /* 24.576MHz */ |
49fedd0d | 130 | } else { |
ef07b491 | 131 | rate = 11289600 / 64; /* 11.2896MHz */ |
49fedd0d | 132 | } |
ef07b491 AZ |
133 | rate /= ((s->clock_div >> 8) & 0xff) + 1; |
134 | ||
135 | wm8750_set_bclk_in(s->wm, rate); | |
136 | } | |
137 | ||
c227f099 | 138 | static uint32_t mv88w8618_audio_read(void *opaque, target_phys_addr_t offset) |
ef07b491 AZ |
139 | { |
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 | ||
c227f099 | 163 | static void mv88w8618_audio_write(void *opaque, target_phys_addr_t offset, |
ef07b491 AZ |
164 | 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; | |
49fedd0d | 193 | if (s->status & s->irq_enable) { |
ef07b491 | 194 | qemu_irq_raise(s->irq); |
49fedd0d | 195 | } |
ef07b491 AZ |
196 | 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 | ||
d5b61ddd | 218 | static void mv88w8618_audio_reset(DeviceState *d) |
ef07b491 | 219 | { |
d5b61ddd JK |
220 | mv88w8618_audio_state *s = FROM_SYSBUS(mv88w8618_audio_state, |
221 | sysbus_from_qdev(d)); | |
ef07b491 AZ |
222 | |
223 | s->playback_mode = 0; | |
224 | s->status = 0; | |
225 | s->irq_enable = 0; | |
267c4840 JK |
226 | s->clock_div = 0; |
227 | s->threshold = 0; | |
228 | s->phys_buf = 0; | |
ef07b491 AZ |
229 | } |
230 | ||
d60efc6b | 231 | static CPUReadMemoryFunc * const mv88w8618_audio_readfn[] = { |
ef07b491 AZ |
232 | mv88w8618_audio_read, |
233 | mv88w8618_audio_read, | |
234 | mv88w8618_audio_read | |
235 | }; | |
236 | ||
d60efc6b | 237 | static CPUWriteMemoryFunc * const mv88w8618_audio_writefn[] = { |
ef07b491 AZ |
238 | mv88w8618_audio_write, |
239 | mv88w8618_audio_write, | |
240 | mv88w8618_audio_write | |
241 | }; | |
242 | ||
81a322d4 | 243 | static int mv88w8618_audio_init(SysBusDevice *dev) |
ef07b491 AZ |
244 | { |
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 | ||
81a322d4 | 256 | return 0; |
ef07b491 AZ |
257 | } |
258 | ||
d5b61ddd JK |
259 | static 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 | ||
ef07b491 AZ |
278 | static SysBusDeviceInfo mv88w8618_audio_info = { |
279 | .init = mv88w8618_audio_init, | |
280 | .qdev.name = "mv88w8618_audio", | |
281 | .qdev.size = sizeof(mv88w8618_audio_state), | |
267c4840 | 282 | .qdev.reset = mv88w8618_audio_reset, |
d5b61ddd | 283 | .qdev.vmsd = &mv88w8618_audio_vmsd, |
ef07b491 AZ |
284 | .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 | ||
295 | static void mv88w8618_register_devices(void) | |
296 | { | |
297 | #ifdef HAS_AUDIO | |
298 | sysbus_register_withprop(&mv88w8618_audio_info); | |
299 | #endif | |
300 | } | |
301 | ||
302 | device_init(mv88w8618_register_devices) |