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/*
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* QEMU Soundblaster 16 emulation
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*
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* Copyright (c) 2003 Vassili Karpov (malc)
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
|
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include <stdio.h> |
| 25 |
#include <stdlib.h> |
| 26 |
#include <inttypes.h> |
| 27 |
|
| 28 |
#include "vl.h" |
| 29 |
|
| 30 |
#define MIN(a, b) ((a)>(b)?(b):(a))
|
| 31 |
#define LENOFA(a) ((int) (sizeof(a)/sizeof(a[0]))) |
| 32 |
|
| 33 |
#define DEREF(x) (void)x |
| 34 |
#define log(...) fprintf (stderr, "sb16: " __VA_ARGS__) |
| 35 |
#define Fail(...) do { \ |
| 36 |
fprintf (stderr, "sb16: " __VA_ARGS__); \
|
| 37 |
abort (); \ |
| 38 |
} while (0) |
| 39 |
|
| 40 |
/* #define DEBUG_SB16 */
|
| 41 |
#ifdef DEBUG_SB16
|
| 42 |
#define lwarn(...) fprintf (stderr, "sb16: " __VA_ARGS__) |
| 43 |
#define linfo(...) fprintf (stderr, "sb16: " __VA_ARGS__) |
| 44 |
#define ldebug(...) fprintf (stderr, "sb16: " __VA_ARGS__) |
| 45 |
#else
|
| 46 |
#define lwarn(...)
|
| 47 |
#define linfo(...)
|
| 48 |
#define ldebug(...)
|
| 49 |
#endif
|
| 50 |
|
| 51 |
#define IO_READ_PROTO(name) \
|
| 52 |
uint32_t name (struct CPUState *env, uint32_t nport)
|
| 53 |
#define IO_WRITE_PROTO(name) \
|
| 54 |
void name (struct CPUState *env, uint32_t nport, uint32_t val) |
| 55 |
|
| 56 |
static struct { |
| 57 |
int ver_lo;
|
| 58 |
int ver_hi;
|
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int irq;
|
| 60 |
int dma;
|
| 61 |
int hdma;
|
| 62 |
int port;
|
| 63 |
int mix_block;
|
| 64 |
} sb = {5, 4, 5, 1, 5, 0x220, -1};
|
| 65 |
|
| 66 |
static int mix_block, noirq; |
| 67 |
|
| 68 |
static struct mixer { |
| 69 |
int nreg;
|
| 70 |
uint8_t regs[0x83];
|
| 71 |
} mixer; |
| 72 |
|
| 73 |
static struct dsp { |
| 74 |
int in_index;
|
| 75 |
int out_data_len;
|
| 76 |
int fmt_stereo;
|
| 77 |
int fmt_signed;
|
| 78 |
int fmt_bits;
|
| 79 |
int dma_auto;
|
| 80 |
int dma_buffer_size;
|
| 81 |
int fifo;
|
| 82 |
int freq;
|
| 83 |
int time_const;
|
| 84 |
int speaker;
|
| 85 |
int needed_bytes;
|
| 86 |
int cmd;
|
| 87 |
int dma_pos;
|
| 88 |
int use_hdma;
|
| 89 |
|
| 90 |
int v2x6;
|
| 91 |
|
| 92 |
uint8_t in_data[10];
|
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uint8_t out_data[10];
|
| 94 |
|
| 95 |
int left_till_irq;
|
| 96 |
} dsp; |
| 97 |
|
| 98 |
#define nocmd ~0 |
| 99 |
|
| 100 |
static void log_dsp (const char *cap) |
| 101 |
{
|
| 102 |
DEREF (cap); |
| 103 |
|
| 104 |
linfo ("%c:%c:%d:%c:dmabuf=%d:pos=%d:freq=%d:timeconst=%d:speaker=%d\n",
|
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dsp.fmt_stereo ? 'S' : 'M', |
| 106 |
dsp.fmt_signed ? 'S' : 'U', |
| 107 |
dsp.fmt_bits, |
| 108 |
dsp.dma_auto ? 'a' : 's', |
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dsp.dma_buffer_size, |
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dsp.dma_pos, |
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dsp.freq, |
| 112 |
dsp.time_const, |
| 113 |
dsp.speaker); |
| 114 |
} |
| 115 |
|
| 116 |
static void control (int hold) |
| 117 |
{
|
| 118 |
linfo ("%d high %d\n", hold, dsp.use_hdma);
|
| 119 |
if (hold) {
|
| 120 |
if (dsp.use_hdma)
|
| 121 |
DMA_hold_DREQ (sb.hdma); |
| 122 |
else
|
| 123 |
DMA_hold_DREQ (sb.dma); |
| 124 |
} |
| 125 |
else {
|
| 126 |
if (dsp.use_hdma)
|
| 127 |
DMA_release_DREQ (sb.hdma); |
| 128 |
else
|
| 129 |
DMA_release_DREQ (sb.dma); |
| 130 |
} |
| 131 |
} |
| 132 |
|
| 133 |
static void dma_cmd (uint8_t cmd, uint8_t d0, int dma_len) |
| 134 |
{
|
| 135 |
int bps;
|
| 136 |
audfmt_e fmt; |
| 137 |
|
| 138 |
dsp.use_hdma = cmd < 0xc0;
|
| 139 |
dsp.fifo = (cmd >> 1) & 1; |
| 140 |
dsp.dma_auto = (cmd >> 2) & 1; |
| 141 |
|
| 142 |
switch (cmd >> 4) { |
| 143 |
case 11: |
| 144 |
dsp.fmt_bits = 16;
|
| 145 |
break;
|
| 146 |
|
| 147 |
case 12: |
| 148 |
dsp.fmt_bits = 8;
|
| 149 |
break;
|
| 150 |
} |
| 151 |
|
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dsp.fmt_signed = (d0 >> 4) & 1; |
| 153 |
dsp.fmt_stereo = (d0 >> 5) & 1; |
| 154 |
|
| 155 |
if (-1 != dsp.time_const) { |
| 156 |
int tmp;
|
| 157 |
|
| 158 |
tmp = 256 - dsp.time_const;
|
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dsp.freq = (1000000 + (tmp / 2)) / tmp; |
| 160 |
} |
| 161 |
bps = 1 << (16 == dsp.fmt_bits); |
| 162 |
|
| 163 |
if (-1 != dma_len) |
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dsp.dma_buffer_size = (dma_len + 1) * bps;
|
| 165 |
|
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linfo ("frequency %d, stereo %d, signed %d, bits %d, size %d, auto %d\n",
|
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dsp.freq, dsp.fmt_stereo, dsp.fmt_signed, dsp.fmt_bits, |
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dsp.dma_buffer_size, dsp.dma_auto); |
| 169 |
|
| 170 |
if (16 == dsp.fmt_bits) { |
| 171 |
if (dsp.fmt_signed) {
|
| 172 |
fmt = AUD_FMT_S16; |
| 173 |
} |
| 174 |
else {
|
| 175 |
fmt = AUD_FMT_U16; |
| 176 |
} |
| 177 |
} |
| 178 |
else {
|
| 179 |
if (dsp.fmt_signed) {
|
| 180 |
fmt = AUD_FMT_S8; |
| 181 |
} |
| 182 |
else {
|
| 183 |
fmt = AUD_FMT_U8; |
| 184 |
} |
| 185 |
} |
| 186 |
|
| 187 |
dsp.dma_pos = 0;
|
| 188 |
dsp.left_till_irq = dsp.dma_buffer_size; |
| 189 |
|
| 190 |
if (sb.mix_block) {
|
| 191 |
mix_block = sb.mix_block; |
| 192 |
} |
| 193 |
else {
|
| 194 |
int align;
|
| 195 |
|
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align = bps << dsp.fmt_stereo; |
| 197 |
mix_block = ((dsp.freq * align) / 100) & ~(align - 1); |
| 198 |
} |
| 199 |
|
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AUD_reset (dsp.freq, 1 << dsp.fmt_stereo, fmt);
|
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control (1);
|
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dsp.speaker = 1;
|
| 203 |
} |
| 204 |
|
| 205 |
static void command (uint8_t cmd) |
| 206 |
{
|
| 207 |
char *msg;
|
| 208 |
|
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msg = (char *) -1; |
| 210 |
|
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linfo ("%#x\n", cmd);
|
| 212 |
|
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if (cmd > 0xaf && cmd < 0xd0) { |
| 214 |
if (cmd & 8) |
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goto error;
|
| 216 |
|
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switch (cmd >> 4) { |
| 218 |
case 11: |
| 219 |
case 12: |
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break;
|
| 221 |
default:
|
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msg = "wrong bits";
|
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goto error;
|
| 224 |
} |
| 225 |
dsp.needed_bytes = 3;
|
| 226 |
} |
| 227 |
else {
|
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switch (cmd) {
|
| 229 |
case 0x00: |
| 230 |
case 0x03: |
| 231 |
case 0xe7: |
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/* IMS uses those when probing for sound devices */
|
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return;
|
| 234 |
|
| 235 |
case 0x10: |
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dsp.needed_bytes = 1;
|
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break;
|
| 238 |
|
| 239 |
case 0x14: |
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dsp.needed_bytes = 2;
|
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dsp.dma_buffer_size = 0;
|
| 242 |
break;
|
| 243 |
|
| 244 |
case 0x20: |
| 245 |
dsp.out_data[dsp.out_data_len++] = 0xff;
|
| 246 |
break;
|
| 247 |
|
| 248 |
case 0x35: |
| 249 |
lwarn ("MIDI commands not implemented\n");
|
| 250 |
break;
|
| 251 |
|
| 252 |
case 0x40: |
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dsp.freq = -1;
|
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dsp.time_const = -1;
|
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dsp.needed_bytes = 1;
|
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break;
|
| 257 |
|
| 258 |
case 0x41: |
| 259 |
case 0x42: |
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dsp.freq = -1;
|
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dsp.time_const = -1;
|
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dsp.needed_bytes = 2;
|
| 263 |
break;
|
| 264 |
|
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case 0x47: /* Continue Auto-Initialize DMA 16bit */ |
| 266 |
break;
|
| 267 |
|
| 268 |
case 0x48: |
| 269 |
dsp.needed_bytes = 2;
|
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break;
|
| 271 |
|
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case 0x27: /* ????????? */ |
| 273 |
case 0x4e: |
| 274 |
return;
|
| 275 |
|
| 276 |
case 0x80: |
| 277 |
cmd = nocmd; |
| 278 |
break;
|
| 279 |
|
| 280 |
case 0x90: |
| 281 |
case 0x91: |
| 282 |
{
|
| 283 |
uint8_t d0; |
| 284 |
|
| 285 |
d0 = 4;
|
| 286 |
if (dsp.fmt_signed) d0 |= 16; |
| 287 |
if (dsp.fmt_stereo) d0 |= 32; |
| 288 |
dma_cmd (cmd == 0x90 ? 0xc4 : 0xc0, d0, -1); |
| 289 |
cmd = nocmd; |
| 290 |
break;
|
| 291 |
} |
| 292 |
|
| 293 |
case 0xd0: /* XXX */ |
| 294 |
control (0);
|
| 295 |
return;
|
| 296 |
|
| 297 |
case 0xd1: |
| 298 |
dsp.speaker = 1;
|
| 299 |
break;
|
| 300 |
|
| 301 |
case 0xd3: |
| 302 |
dsp.speaker = 0;
|
| 303 |
return;
|
| 304 |
|
| 305 |
case 0xd4: |
| 306 |
control (1);
|
| 307 |
break;
|
| 308 |
|
| 309 |
case 0xd5: |
| 310 |
control (0);
|
| 311 |
break;
|
| 312 |
|
| 313 |
case 0xd6: |
| 314 |
control (1);
|
| 315 |
break;
|
| 316 |
|
| 317 |
case 0xd9: |
| 318 |
control (0);
|
| 319 |
dsp.dma_auto = 0;
|
| 320 |
return;
|
| 321 |
|
| 322 |
case 0xda: |
| 323 |
control (0);
|
| 324 |
dsp.dma_auto = 0;
|
| 325 |
break;
|
| 326 |
|
| 327 |
case 0xe0: |
| 328 |
dsp.needed_bytes = 1;
|
| 329 |
break;
|
| 330 |
|
| 331 |
case 0xe1: |
| 332 |
dsp.out_data[dsp.out_data_len++] = sb.ver_lo; |
| 333 |
dsp.out_data[dsp.out_data_len++] = sb.ver_hi; |
| 334 |
return;
|
| 335 |
|
| 336 |
case 0xf2: |
| 337 |
dsp.out_data[dsp.out_data_len++] = 0xaa;
|
| 338 |
mixer.regs[0x82] |= mixer.regs[0x80]; |
| 339 |
pic_set_irq (sb.irq, 1);
|
| 340 |
return;
|
| 341 |
|
| 342 |
default:
|
| 343 |
msg = "is unknown";
|
| 344 |
goto error;
|
| 345 |
} |
| 346 |
} |
| 347 |
dsp.cmd = cmd; |
| 348 |
return;
|
| 349 |
|
| 350 |
error:
|
| 351 |
Fail ("%#x %s", cmd, msg);
|
| 352 |
return;
|
| 353 |
} |
| 354 |
|
| 355 |
static void complete (void) |
| 356 |
{
|
| 357 |
linfo ("complete command %#x, in_index %d, needed_bytes %d\n",
|
| 358 |
dsp.cmd, dsp.in_index, dsp.needed_bytes); |
| 359 |
|
| 360 |
if (dsp.cmd > 0xaf && dsp.cmd < 0xd0) { |
| 361 |
int d0, d1, d2;
|
| 362 |
|
| 363 |
d0 = dsp.in_data[0];
|
| 364 |
d1 = dsp.in_data[1];
|
| 365 |
d2 = dsp.in_data[2];
|
| 366 |
|
| 367 |
ldebug ("d0 = %d, d1 = %d, d2 = %d\n",
|
| 368 |
d0, d1, d2); |
| 369 |
dma_cmd (dsp.cmd, d0, d1 + (d2 << 8));
|
| 370 |
} |
| 371 |
else {
|
| 372 |
switch (dsp.cmd) {
|
| 373 |
|
| 374 |
case 0x10: |
| 375 |
break;
|
| 376 |
|
| 377 |
case 0x14: |
| 378 |
{
|
| 379 |
int d0, d1;
|
| 380 |
int save_left;
|
| 381 |
int save_pos;
|
| 382 |
|
| 383 |
d0 = dsp.in_data[0];
|
| 384 |
d1 = dsp.in_data[1];
|
| 385 |
|
| 386 |
save_left = dsp.left_till_irq; |
| 387 |
save_pos = dsp.dma_pos; |
| 388 |
dma_cmd (0xc0, 0, d0 + (d1 << 8)); |
| 389 |
dsp.left_till_irq = save_left; |
| 390 |
dsp.dma_pos = save_pos; |
| 391 |
|
| 392 |
linfo ("set buffer size data[%d, %d] %d pos %d\n",
|
| 393 |
d0, d1, dsp.dma_buffer_size, dsp.dma_pos); |
| 394 |
break;
|
| 395 |
} |
| 396 |
|
| 397 |
case 0x40: |
| 398 |
dsp.time_const = dsp.in_data[0];
|
| 399 |
linfo ("set time const %d\n", dsp.time_const);
|
| 400 |
break;
|
| 401 |
|
| 402 |
case 0x41: |
| 403 |
case 0x42: |
| 404 |
dsp.freq = dsp.in_data[1] + (dsp.in_data[0] << 8); |
| 405 |
linfo ("set freq %#x, %#x = %d\n",
|
| 406 |
dsp.in_data[1], dsp.in_data[0], dsp.freq); |
| 407 |
break;
|
| 408 |
|
| 409 |
case 0x48: |
| 410 |
dsp.dma_buffer_size = dsp.in_data[1] + (dsp.in_data[0] << 8); |
| 411 |
linfo ("set dma len %#x, %#x = %d\n",
|
| 412 |
dsp.in_data[1], dsp.in_data[0], dsp.dma_buffer_size); |
| 413 |
break;
|
| 414 |
|
| 415 |
case 0xe0: |
| 416 |
dsp.out_data_len = 1;
|
| 417 |
linfo ("data = %#x\n", dsp.in_data[0]); |
| 418 |
dsp.out_data[0] = dsp.in_data[0] ^ 0xff; |
| 419 |
break;
|
| 420 |
|
| 421 |
default:
|
| 422 |
goto error;
|
| 423 |
} |
| 424 |
} |
| 425 |
|
| 426 |
dsp.cmd = -1;
|
| 427 |
return;
|
| 428 |
|
| 429 |
error:
|
| 430 |
Fail ("unrecognized command %#x", dsp.cmd);
|
| 431 |
} |
| 432 |
|
| 433 |
static IO_WRITE_PROTO (dsp_write)
|
| 434 |
{
|
| 435 |
int iport;
|
| 436 |
|
| 437 |
iport = nport - sb.port; |
| 438 |
|
| 439 |
switch (iport) {
|
| 440 |
case 0x6: |
| 441 |
if (0 == val) |
| 442 |
dsp.v2x6 = 0;
|
| 443 |
else if ((1 == val) && (0 == dsp.v2x6)) { |
| 444 |
dsp.v2x6 = 1;
|
| 445 |
dsp.out_data[dsp.out_data_len++] = 0xaa;
|
| 446 |
} |
| 447 |
else
|
| 448 |
dsp.v2x6 = ~0;
|
| 449 |
break;
|
| 450 |
|
| 451 |
case 0xc: /* write data or command | write status */ |
| 452 |
if (0 == dsp.needed_bytes) { |
| 453 |
command (val); |
| 454 |
if (0 == dsp.needed_bytes) { |
| 455 |
log_dsp (__func__); |
| 456 |
} |
| 457 |
} |
| 458 |
else {
|
| 459 |
dsp.in_data[dsp.in_index++] = val; |
| 460 |
if (dsp.in_index == dsp.needed_bytes) {
|
| 461 |
dsp.needed_bytes = 0;
|
| 462 |
dsp.in_index = 0;
|
| 463 |
complete (); |
| 464 |
log_dsp (__func__); |
| 465 |
} |
| 466 |
} |
| 467 |
break;
|
| 468 |
|
| 469 |
default:
|
| 470 |
Fail ("(nport=%#x, val=%#x)", nport, val);
|
| 471 |
} |
| 472 |
} |
| 473 |
|
| 474 |
static IO_READ_PROTO (dsp_read)
|
| 475 |
{
|
| 476 |
char *msg;
|
| 477 |
int iport, retval;
|
| 478 |
|
| 479 |
msg = (char *) -1; |
| 480 |
iport = nport - sb.port; |
| 481 |
|
| 482 |
switch (iport) {
|
| 483 |
|
| 484 |
case 0x6: /* reset */ |
| 485 |
return 0; |
| 486 |
|
| 487 |
case 0xa: /* read data */ |
| 488 |
if (dsp.out_data_len) {
|
| 489 |
retval = dsp.out_data[--dsp.out_data_len]; |
| 490 |
} |
| 491 |
else {
|
| 492 |
#if 1 |
| 493 |
lwarn ("empty output buffer\n");
|
| 494 |
retval = 0;
|
| 495 |
#else
|
| 496 |
msg = "empty output buffer";
|
| 497 |
goto error;
|
| 498 |
#endif
|
| 499 |
} |
| 500 |
break;
|
| 501 |
|
| 502 |
case 0xc: /* 0 can write */ |
| 503 |
retval = 0;
|
| 504 |
break;
|
| 505 |
|
| 506 |
case 0xd: /* timer interrupt clear */ |
| 507 |
goto error;
|
| 508 |
|
| 509 |
case 0xe: /* data available status | irq 8 ack */ |
| 510 |
/* XXX drop pic irq line here? */
|
| 511 |
ldebug ("8 ack\n");
|
| 512 |
retval = (0 == dsp.out_data_len) ? 0 : 0x80; |
| 513 |
mixer.regs[0x82] &= ~mixer.regs[0x80]; |
| 514 |
pic_set_irq (sb.irq, 0);
|
| 515 |
break;
|
| 516 |
|
| 517 |
case 0xf: /* irq 16 ack */ |
| 518 |
/* XXX drop pic irq line here? */
|
| 519 |
ldebug ("16 ack\n");
|
| 520 |
retval = 0xff;
|
| 521 |
mixer.regs[0x82] &= ~mixer.regs[0x80]; |
| 522 |
pic_set_irq (sb.irq, 0);
|
| 523 |
break;
|
| 524 |
|
| 525 |
default:
|
| 526 |
goto error;
|
| 527 |
} |
| 528 |
|
| 529 |
if ((0xc != iport) && (0xe != iport)) { |
| 530 |
ldebug ("nport=%#x iport %#x = %#x\n",
|
| 531 |
nport, iport, retval); |
| 532 |
} |
| 533 |
|
| 534 |
return retval;
|
| 535 |
|
| 536 |
error:
|
| 537 |
Fail ("(nport=%#x) %s", nport, msg);
|
| 538 |
} |
| 539 |
|
| 540 |
static IO_WRITE_PROTO(mixer_write_indexb)
|
| 541 |
{
|
| 542 |
mixer.nreg = val & 0xff;
|
| 543 |
} |
| 544 |
|
| 545 |
static IO_WRITE_PROTO(mixer_write_datab)
|
| 546 |
{
|
| 547 |
mixer.regs[mixer.nreg] = val; |
| 548 |
} |
| 549 |
|
| 550 |
static IO_WRITE_PROTO(mixer_write_indexw)
|
| 551 |
{
|
| 552 |
mixer_write_indexb (env, nport, val & 0xff);
|
| 553 |
mixer_write_datab (env, nport, (val >> 8) & 0xff); |
| 554 |
} |
| 555 |
|
| 556 |
static IO_READ_PROTO(mixer_read)
|
| 557 |
{
|
| 558 |
return mixer.regs[mixer.nreg];
|
| 559 |
} |
| 560 |
|
| 561 |
void SB16_run (void) |
| 562 |
{
|
| 563 |
if (0 == dsp.speaker) |
| 564 |
return;
|
| 565 |
|
| 566 |
AUD_run (); |
| 567 |
} |
| 568 |
|
| 569 |
static int write_audio (uint32_t addr, int len, int size) |
| 570 |
{
|
| 571 |
int temp, net;
|
| 572 |
|
| 573 |
temp = size; |
| 574 |
|
| 575 |
net = 0;
|
| 576 |
|
| 577 |
while (temp) {
|
| 578 |
int left_till_end;
|
| 579 |
int to_copy;
|
| 580 |
int copied;
|
| 581 |
|
| 582 |
left_till_end = len - dsp.dma_pos; |
| 583 |
|
| 584 |
to_copy = MIN (temp, left_till_end); |
| 585 |
|
| 586 |
copied = AUD_write ((void *) (addr + dsp.dma_pos), to_copy);
|
| 587 |
|
| 588 |
temp -= copied; |
| 589 |
dsp.dma_pos += copied; |
| 590 |
|
| 591 |
if (dsp.dma_pos == len) {
|
| 592 |
dsp.dma_pos = 0;
|
| 593 |
} |
| 594 |
|
| 595 |
net += copied; |
| 596 |
|
| 597 |
if (copied != to_copy)
|
| 598 |
return net;
|
| 599 |
} |
| 600 |
|
| 601 |
return net;
|
| 602 |
} |
| 603 |
|
| 604 |
static int SB_read_DMA (uint32_t addr, int size, int *_irq) |
| 605 |
{
|
| 606 |
int free, till, copy, written;
|
| 607 |
|
| 608 |
if (0 == dsp.speaker) |
| 609 |
return 0; |
| 610 |
|
| 611 |
if (dsp.left_till_irq < 0) { |
| 612 |
dsp.left_till_irq += dsp.dma_buffer_size; |
| 613 |
return dsp.dma_pos;
|
| 614 |
} |
| 615 |
|
| 616 |
free = AUD_get_free (); |
| 617 |
|
| 618 |
if ((free <= 0) || (0 == size)) { |
| 619 |
return dsp.dma_pos;
|
| 620 |
} |
| 621 |
|
| 622 |
if (mix_block > 0) { |
| 623 |
copy = MIN (free, mix_block); |
| 624 |
} |
| 625 |
else {
|
| 626 |
copy = free; |
| 627 |
} |
| 628 |
|
| 629 |
till = dsp.left_till_irq; |
| 630 |
|
| 631 |
ldebug ("addr:%#010x free:%d till:%d size:%d\n",
|
| 632 |
addr, free, till, size); |
| 633 |
if (till <= copy) {
|
| 634 |
if (0 == dsp.dma_auto) { |
| 635 |
copy = till; |
| 636 |
} |
| 637 |
} |
| 638 |
|
| 639 |
written = write_audio (addr, size, copy); |
| 640 |
dsp.left_till_irq -= written; |
| 641 |
AUD_adjust_estimate (free - written); |
| 642 |
|
| 643 |
if (dsp.left_till_irq <= 0) { |
| 644 |
mixer.regs[0x82] |= mixer.regs[0x80]; |
| 645 |
if (0 == noirq) { |
| 646 |
ldebug ("request irq\n");
|
| 647 |
*_irq = sb.irq; |
| 648 |
} |
| 649 |
|
| 650 |
if (0 == dsp.dma_auto) { |
| 651 |
control (0);
|
| 652 |
} |
| 653 |
} |
| 654 |
|
| 655 |
ldebug ("pos %5d free %5d size %5d till % 5d copy %5d dma size %5d\n",
|
| 656 |
dsp.dma_pos, free, size, dsp.left_till_irq, copy, |
| 657 |
dsp.dma_buffer_size); |
| 658 |
|
| 659 |
if (dsp.left_till_irq <= 0) { |
| 660 |
dsp.left_till_irq += dsp.dma_buffer_size; |
| 661 |
} |
| 662 |
|
| 663 |
return dsp.dma_pos;
|
| 664 |
} |
| 665 |
|
| 666 |
static int dma_misc_handler (int moo) |
| 667 |
{
|
| 668 |
return -1; |
| 669 |
} |
| 670 |
|
| 671 |
static int magic_of_irq (int irq) |
| 672 |
{
|
| 673 |
switch (irq) {
|
| 674 |
case 2: |
| 675 |
return 1; |
| 676 |
case 5: |
| 677 |
return 2; |
| 678 |
case 7: |
| 679 |
return 4; |
| 680 |
case 10: |
| 681 |
return 8; |
| 682 |
default:
|
| 683 |
log ("bad irq %d\n", irq);
|
| 684 |
return 2; |
| 685 |
} |
| 686 |
} |
| 687 |
|
| 688 |
static int irq_of_magic (int magic) |
| 689 |
{
|
| 690 |
switch (magic) {
|
| 691 |
case 1: |
| 692 |
return 2; |
| 693 |
case 2: |
| 694 |
return 5; |
| 695 |
case 4: |
| 696 |
return 7; |
| 697 |
case 8: |
| 698 |
return 10; |
| 699 |
default:
|
| 700 |
log ("bad irq magic %d\n", magic);
|
| 701 |
return 2; |
| 702 |
} |
| 703 |
} |
| 704 |
|
| 705 |
void SB16_init (void) |
| 706 |
{
|
| 707 |
int i;
|
| 708 |
static const uint8_t dsp_write_ports[] = {0x6, 0xc}; |
| 709 |
static const uint8_t dsp_read_ports[] = {0x6, 0xa, 0xc, 0xd, 0xe, 0xf}; |
| 710 |
|
| 711 |
mixer.regs[0x0e] = ~0; |
| 712 |
mixer.regs[0x80] = magic_of_irq (sb.irq);
|
| 713 |
mixer.regs[0x81] = 0x20 | (sb.dma << 1); |
| 714 |
|
| 715 |
DEREF (irq_of_magic); |
| 716 |
|
| 717 |
for (i = 0x30; i < 0x48; i++) { |
| 718 |
mixer.regs[i] = 0x20;
|
| 719 |
} |
| 720 |
|
| 721 |
for (i = 0; i < LENOFA (dsp_write_ports); i++) { |
| 722 |
register_ioport_write (sb.port + dsp_write_ports[i], 1, dsp_write, 1); |
| 723 |
} |
| 724 |
|
| 725 |
for (i = 0; i < LENOFA (dsp_read_ports); i++) { |
| 726 |
register_ioport_read (sb.port + dsp_read_ports[i], 1, dsp_read, 1); |
| 727 |
} |
| 728 |
|
| 729 |
register_ioport_write (sb.port + 0x4, 1, mixer_write_indexb, 1); |
| 730 |
register_ioport_write (sb.port + 0x4, 1, mixer_write_indexw, 2); |
| 731 |
register_ioport_read (sb.port + 0x5, 1, mixer_read, 1); |
| 732 |
register_ioport_write (sb.port + 0x5, 1, mixer_write_datab, 1); |
| 733 |
|
| 734 |
DMA_register_channel (sb.hdma, SB_read_DMA, dma_misc_handler); |
| 735 |
DMA_register_channel (sb.dma, SB_read_DMA, dma_misc_handler); |
| 736 |
} |