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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 "vl.h" |
| 25 |
|
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#define MIN(a, b) ((a)>(b)?(b):(a))
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#define LENOFA(a) ((int) (sizeof(a)/sizeof(a[0]))) |
| 28 |
|
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#define log(...) do { \ |
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fprintf (stderr, "sb16: " __VA_ARGS__); \
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fputc ('\n', stderr); \
|
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} while (0) |
| 33 |
|
| 34 |
/* #define DEBUG_SB16 */
|
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#ifdef DEBUG_SB16
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#define lwarn(...) fprintf (stderr, "sb16: " __VA_ARGS__) |
| 37 |
#define linfo(...) fprintf (stderr, "sb16: " __VA_ARGS__) |
| 38 |
#define ldebug(...) fprintf (stderr, "sb16: " __VA_ARGS__) |
| 39 |
#else
|
| 40 |
#define lwarn(...)
|
| 41 |
#define linfo(...)
|
| 42 |
#define ldebug(...)
|
| 43 |
#endif
|
| 44 |
|
| 45 |
#define IO_READ_PROTO(name) \
|
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uint32_t name (void *opaque, uint32_t nport)
|
| 47 |
#define IO_WRITE_PROTO(name) \
|
| 48 |
void name (void *opaque, uint32_t nport, uint32_t val) |
| 49 |
|
| 50 |
static const char e3[] = "COPYRIGHT (C) CREATIVE TECHNOLOGY LTD, 1992."; |
| 51 |
|
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static struct { |
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int ver_lo;
|
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int ver_hi;
|
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int irq;
|
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int dma;
|
| 57 |
int hdma;
|
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int port;
|
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int mix_block;
|
| 60 |
} sb = {5, 4, 5, 1, 5, 0x220, -1};
|
| 61 |
|
| 62 |
static int mix_block, noirq; |
| 63 |
|
| 64 |
typedef struct SB16State { |
| 65 |
int in_index;
|
| 66 |
int out_data_len;
|
| 67 |
int fmt_stereo;
|
| 68 |
int fmt_signed;
|
| 69 |
int fmt_bits;
|
| 70 |
int dma_auto;
|
| 71 |
int dma_buffer_size;
|
| 72 |
int fifo;
|
| 73 |
int freq;
|
| 74 |
int time_const;
|
| 75 |
int speaker;
|
| 76 |
int needed_bytes;
|
| 77 |
int cmd;
|
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int dma_pos;
|
| 79 |
int use_hdma;
|
| 80 |
|
| 81 |
int v2x6;
|
| 82 |
|
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uint8_t in_data[10];
|
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uint8_t out_data[50];
|
| 85 |
|
| 86 |
int left_till_irq;
|
| 87 |
|
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/* mixer state */
|
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int mixer_nreg;
|
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uint8_t mixer_regs[256];
|
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} SB16State; |
| 92 |
|
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/* XXX: suppress that and use a context */
|
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static struct SB16State dsp; |
| 95 |
|
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static void log_dsp (SB16State *dsp) |
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{
|
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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', |
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dsp->fmt_signed ? 'S' : 'U', |
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dsp->fmt_bits, |
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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, |
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dsp->time_const, |
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dsp->speaker); |
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} |
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|
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static void control (int hold) |
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{
|
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linfo ("%d high %d\n", hold, dsp.use_hdma);
|
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if (hold) {
|
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if (dsp.use_hdma)
|
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DMA_hold_DREQ (sb.hdma); |
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else
|
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DMA_hold_DREQ (sb.dma); |
| 118 |
} |
| 119 |
else {
|
| 120 |
if (dsp.use_hdma)
|
| 121 |
DMA_release_DREQ (sb.hdma); |
| 122 |
else
|
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DMA_release_DREQ (sb.dma); |
| 124 |
} |
| 125 |
} |
| 126 |
|
| 127 |
static void dma_cmd (uint8_t cmd, uint8_t d0, int dma_len) |
| 128 |
{
|
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int bps;
|
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audfmt_e fmt; |
| 131 |
|
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dsp.use_hdma = cmd < 0xc0;
|
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dsp.fifo = (cmd >> 1) & 1; |
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dsp.dma_auto = (cmd >> 2) & 1; |
| 135 |
|
| 136 |
switch (cmd >> 4) { |
| 137 |
case 11: |
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dsp.fmt_bits = 16;
|
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break;
|
| 140 |
|
| 141 |
case 12: |
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dsp.fmt_bits = 8;
|
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break;
|
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} |
| 145 |
|
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dsp.fmt_signed = (d0 >> 4) & 1; |
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dsp.fmt_stereo = (d0 >> 5) & 1; |
| 148 |
|
| 149 |
if (-1 != dsp.time_const) { |
| 150 |
int tmp;
|
| 151 |
|
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tmp = 256 - dsp.time_const;
|
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dsp.freq = (1000000 + (tmp / 2)) / tmp; |
| 154 |
} |
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bps = 1 << (16 == dsp.fmt_bits); |
| 156 |
|
| 157 |
if (-1 != dma_len) |
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dsp.dma_buffer_size = (dma_len + 1) * bps;
|
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|
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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); |
| 163 |
|
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if (16 == dsp.fmt_bits) { |
| 165 |
if (dsp.fmt_signed) {
|
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fmt = AUD_FMT_S16; |
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} |
| 168 |
else {
|
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fmt = AUD_FMT_U16; |
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} |
| 171 |
} |
| 172 |
else {
|
| 173 |
if (dsp.fmt_signed) {
|
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fmt = AUD_FMT_S8; |
| 175 |
} |
| 176 |
else {
|
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fmt = AUD_FMT_U8; |
| 178 |
} |
| 179 |
} |
| 180 |
|
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dsp.dma_pos = 0;
|
| 182 |
dsp.left_till_irq = dsp.dma_buffer_size; |
| 183 |
|
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if (sb.mix_block) {
|
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mix_block = sb.mix_block; |
| 186 |
} |
| 187 |
else {
|
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int align;
|
| 189 |
|
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align = bps << dsp.fmt_stereo; |
| 191 |
mix_block = ((dsp.freq * align) / 100) & ~(align - 1); |
| 192 |
} |
| 193 |
|
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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;
|
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} |
| 198 |
|
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static inline void dsp_out_data(SB16State *dsp, int val) |
| 200 |
{
|
| 201 |
if (dsp->out_data_len < sizeof(dsp->out_data)) |
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dsp->out_data[dsp->out_data_len++] = val; |
| 203 |
} |
| 204 |
|
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static void command (SB16State *dsp, uint8_t cmd) |
| 206 |
{
|
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linfo ("%#x\n", cmd);
|
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|
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if (cmd > 0xaf && cmd < 0xd0) { |
| 210 |
if (cmd & 8) |
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goto error;
|
| 212 |
|
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switch (cmd >> 4) { |
| 214 |
case 11: |
| 215 |
case 12: |
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break;
|
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default:
|
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log("%#x wrong bits", cmd);
|
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goto error;
|
| 220 |
} |
| 221 |
dsp->needed_bytes = 3;
|
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} |
| 223 |
else {
|
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switch (cmd) {
|
| 225 |
case 0x00: |
| 226 |
case 0x03: |
| 227 |
case 0xe7: |
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/* IMS uses those when probing for sound devices */
|
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return;
|
| 230 |
|
| 231 |
case 0x04: |
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dsp->needed_bytes = 1;
|
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break;
|
| 234 |
|
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case 0x05: |
| 236 |
case 0x0e: |
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dsp->needed_bytes = 2;
|
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break;
|
| 239 |
|
| 240 |
case 0x0f: |
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dsp->needed_bytes = 1;
|
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dsp_out_data (dsp, 0);
|
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break;
|
| 244 |
|
| 245 |
case 0x10: |
| 246 |
dsp->needed_bytes = 1;
|
| 247 |
break;
|
| 248 |
|
| 249 |
case 0x14: |
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dsp->needed_bytes = 2;
|
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dsp->dma_buffer_size = 0;
|
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break;
|
| 253 |
|
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case 0x20: |
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dsp_out_data(dsp, 0xff);
|
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break;
|
| 257 |
|
| 258 |
case 0x35: |
| 259 |
lwarn ("MIDI commands not implemented\n");
|
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break;
|
| 261 |
|
| 262 |
case 0x40: |
| 263 |
dsp->freq = -1;
|
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dsp->time_const = -1;
|
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dsp->needed_bytes = 1;
|
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break;
|
| 267 |
|
| 268 |
case 0x41: |
| 269 |
case 0x42: |
| 270 |
dsp->freq = -1;
|
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dsp->time_const = -1;
|
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dsp->needed_bytes = 2;
|
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break;
|
| 274 |
|
| 275 |
case 0x47: /* Continue Auto-Initialize DMA 16bit */ |
| 276 |
break;
|
| 277 |
|
| 278 |
case 0x48: |
| 279 |
dsp->needed_bytes = 2;
|
| 280 |
break;
|
| 281 |
|
| 282 |
case 0x27: /* ????????? */ |
| 283 |
case 0x4e: |
| 284 |
return;
|
| 285 |
|
| 286 |
case 0x80: |
| 287 |
cmd = -1;
|
| 288 |
break;
|
| 289 |
|
| 290 |
case 0x90: |
| 291 |
case 0x91: |
| 292 |
{
|
| 293 |
uint8_t d0; |
| 294 |
|
| 295 |
d0 = 4;
|
| 296 |
/* if (dsp->fmt_signed) d0 |= 16; */
|
| 297 |
/* if (dsp->fmt_stereo) d0 |= 32; */
|
| 298 |
dma_cmd (cmd == 0x90 ? 0xc4 : 0xc0, d0, -1); |
| 299 |
cmd = -1;
|
| 300 |
break;
|
| 301 |
} |
| 302 |
|
| 303 |
case 0xd0: /* XXX */ |
| 304 |
control (0);
|
| 305 |
return;
|
| 306 |
|
| 307 |
case 0xd1: |
| 308 |
dsp->speaker = 1;
|
| 309 |
break;
|
| 310 |
|
| 311 |
case 0xd3: |
| 312 |
dsp->speaker = 0;
|
| 313 |
return;
|
| 314 |
|
| 315 |
case 0xd4: |
| 316 |
control (1);
|
| 317 |
break;
|
| 318 |
|
| 319 |
case 0xd5: |
| 320 |
control (0);
|
| 321 |
break;
|
| 322 |
|
| 323 |
case 0xd6: |
| 324 |
control (1);
|
| 325 |
break;
|
| 326 |
|
| 327 |
case 0xd9: |
| 328 |
control (0);
|
| 329 |
dsp->dma_auto = 0;
|
| 330 |
return;
|
| 331 |
|
| 332 |
case 0xda: |
| 333 |
control (0);
|
| 334 |
dsp->dma_auto = 0;
|
| 335 |
break;
|
| 336 |
|
| 337 |
case 0xe0: |
| 338 |
dsp->needed_bytes = 1;
|
| 339 |
break;
|
| 340 |
|
| 341 |
case 0xe1: |
| 342 |
dsp_out_data(dsp, sb.ver_lo); |
| 343 |
dsp_out_data(dsp, sb.ver_hi); |
| 344 |
return;
|
| 345 |
|
| 346 |
case 0xe3: |
| 347 |
{
|
| 348 |
int i;
|
| 349 |
for (i = sizeof (e3) - 1; i >= 0; --i) |
| 350 |
dsp_out_data (dsp, e3[i]); |
| 351 |
return;
|
| 352 |
} |
| 353 |
|
| 354 |
case 0xf2: |
| 355 |
dsp_out_data(dsp, 0xaa);
|
| 356 |
dsp->mixer_regs[0x82] |= dsp->mixer_regs[0x80]; |
| 357 |
pic_set_irq (sb.irq, 1);
|
| 358 |
return;
|
| 359 |
|
| 360 |
default:
|
| 361 |
log("%#x is unknown", cmd);
|
| 362 |
goto error;
|
| 363 |
} |
| 364 |
} |
| 365 |
dsp->cmd = cmd; |
| 366 |
return;
|
| 367 |
|
| 368 |
error:
|
| 369 |
return;
|
| 370 |
} |
| 371 |
|
| 372 |
static void complete (SB16State *dsp) |
| 373 |
{
|
| 374 |
linfo ("complete command %#x, in_index %d, needed_bytes %d\n",
|
| 375 |
dsp->cmd, dsp->in_index, dsp->needed_bytes); |
| 376 |
|
| 377 |
if (dsp->cmd > 0xaf && dsp->cmd < 0xd0) { |
| 378 |
int d0, d1, d2;
|
| 379 |
|
| 380 |
d0 = dsp->in_data[0];
|
| 381 |
d1 = dsp->in_data[1];
|
| 382 |
d2 = dsp->in_data[2];
|
| 383 |
|
| 384 |
ldebug ("d0 = %d, d1 = %d, d2 = %d\n",
|
| 385 |
d0, d1, d2); |
| 386 |
dma_cmd (dsp->cmd, d0, d1 + (d2 << 8));
|
| 387 |
} |
| 388 |
else {
|
| 389 |
switch (dsp->cmd) {
|
| 390 |
case 0x05: |
| 391 |
case 0x04: |
| 392 |
case 0x0e: |
| 393 |
case 0x0f: |
| 394 |
break;
|
| 395 |
|
| 396 |
case 0x10: |
| 397 |
break;
|
| 398 |
|
| 399 |
case 0x14: |
| 400 |
{
|
| 401 |
int d0, d1;
|
| 402 |
int save_left;
|
| 403 |
int save_pos;
|
| 404 |
|
| 405 |
d0 = dsp->in_data[0];
|
| 406 |
d1 = dsp->in_data[1];
|
| 407 |
|
| 408 |
save_left = dsp->left_till_irq; |
| 409 |
save_pos = dsp->dma_pos; |
| 410 |
dma_cmd (0xc0, 0, d0 + (d1 << 8)); |
| 411 |
dsp->left_till_irq = save_left; |
| 412 |
dsp->dma_pos = save_pos; |
| 413 |
|
| 414 |
linfo ("set buffer size data[%d, %d] %d pos %d\n",
|
| 415 |
d0, d1, dsp->dma_buffer_size, dsp->dma_pos); |
| 416 |
break;
|
| 417 |
} |
| 418 |
|
| 419 |
case 0x40: |
| 420 |
dsp->time_const = dsp->in_data[0];
|
| 421 |
linfo ("set time const %d\n", dsp->time_const);
|
| 422 |
break;
|
| 423 |
|
| 424 |
case 0x41: |
| 425 |
case 0x42: |
| 426 |
dsp->freq = dsp->in_data[1] + (dsp->in_data[0] << 8); |
| 427 |
linfo ("set freq %#x, %#x = %d\n",
|
| 428 |
dsp->in_data[1], dsp->in_data[0], dsp->freq); |
| 429 |
break;
|
| 430 |
|
| 431 |
case 0x48: |
| 432 |
dsp->dma_buffer_size = dsp->in_data[1] + (dsp->in_data[0] << 8); |
| 433 |
linfo ("set dma len %#x, %#x = %d\n",
|
| 434 |
dsp->in_data[1], dsp->in_data[0], dsp->dma_buffer_size); |
| 435 |
break;
|
| 436 |
|
| 437 |
case 0xe0: |
| 438 |
dsp->out_data_len = 0;
|
| 439 |
linfo ("data = %#x\n", dsp->in_data[0]); |
| 440 |
dsp_out_data(dsp, dsp->in_data[0] ^ 0xff); |
| 441 |
break;
|
| 442 |
|
| 443 |
default:
|
| 444 |
log ("unrecognized command %#x", dsp->cmd);
|
| 445 |
return;
|
| 446 |
} |
| 447 |
} |
| 448 |
|
| 449 |
dsp->cmd = -1;
|
| 450 |
return;
|
| 451 |
} |
| 452 |
|
| 453 |
static IO_WRITE_PROTO (dsp_write)
|
| 454 |
{
|
| 455 |
SB16State *dsp = opaque; |
| 456 |
int iport;
|
| 457 |
|
| 458 |
iport = nport - sb.port; |
| 459 |
|
| 460 |
ldebug ("write %#x %#x\n", nport, iport);
|
| 461 |
switch (iport) {
|
| 462 |
case 0x6: |
| 463 |
control (0);
|
| 464 |
if (0 == val) |
| 465 |
dsp->v2x6 = 0;
|
| 466 |
else if ((1 == val) && (0 == dsp->v2x6)) { |
| 467 |
dsp->v2x6 = 1;
|
| 468 |
dsp_out_data(dsp, 0xaa);
|
| 469 |
} |
| 470 |
else
|
| 471 |
dsp->v2x6 = ~0;
|
| 472 |
break;
|
| 473 |
|
| 474 |
case 0xc: /* write data or command | write status */ |
| 475 |
if (0 == dsp->needed_bytes) { |
| 476 |
command (dsp, val); |
| 477 |
if (0 == dsp->needed_bytes) { |
| 478 |
log_dsp (dsp); |
| 479 |
} |
| 480 |
} |
| 481 |
else {
|
| 482 |
dsp->in_data[dsp->in_index++] = val; |
| 483 |
if (dsp->in_index == dsp->needed_bytes) {
|
| 484 |
dsp->needed_bytes = 0;
|
| 485 |
dsp->in_index = 0;
|
| 486 |
complete (dsp); |
| 487 |
log_dsp (dsp); |
| 488 |
} |
| 489 |
} |
| 490 |
break;
|
| 491 |
|
| 492 |
default:
|
| 493 |
log ("(nport=%#x, val=%#x)", nport, val);
|
| 494 |
break;
|
| 495 |
} |
| 496 |
} |
| 497 |
|
| 498 |
static IO_READ_PROTO (dsp_read)
|
| 499 |
{
|
| 500 |
SB16State *dsp = opaque; |
| 501 |
int iport, retval;
|
| 502 |
|
| 503 |
iport = nport - sb.port; |
| 504 |
|
| 505 |
switch (iport) {
|
| 506 |
|
| 507 |
case 0x6: /* reset */ |
| 508 |
return 0; |
| 509 |
|
| 510 |
case 0xa: /* read data */ |
| 511 |
if (dsp->out_data_len) {
|
| 512 |
retval = dsp->out_data[--dsp->out_data_len]; |
| 513 |
} else {
|
| 514 |
log("empty output buffer");
|
| 515 |
goto error;
|
| 516 |
} |
| 517 |
break;
|
| 518 |
|
| 519 |
case 0xc: /* 0 can write */ |
| 520 |
retval = 0;
|
| 521 |
break;
|
| 522 |
|
| 523 |
case 0xd: /* timer interrupt clear */ |
| 524 |
log("timer interrupt clear");
|
| 525 |
goto error;
|
| 526 |
|
| 527 |
case 0xe: /* data available status | irq 8 ack */ |
| 528 |
/* XXX drop pic irq line here? */
|
| 529 |
ldebug ("8 ack\n");
|
| 530 |
retval = (0 == dsp->out_data_len) ? 0 : 0x80; |
| 531 |
dsp->mixer_regs[0x82] &= ~dsp->mixer_regs[0x80]; |
| 532 |
pic_set_irq (sb.irq, 0);
|
| 533 |
break;
|
| 534 |
|
| 535 |
case 0xf: /* irq 16 ack */ |
| 536 |
/* XXX drop pic irq line here? */
|
| 537 |
ldebug ("16 ack\n");
|
| 538 |
retval = 0xff;
|
| 539 |
dsp->mixer_regs[0x82] &= ~dsp->mixer_regs[0x80]; |
| 540 |
pic_set_irq (sb.irq, 0);
|
| 541 |
break;
|
| 542 |
|
| 543 |
default:
|
| 544 |
goto error;
|
| 545 |
} |
| 546 |
|
| 547 |
if ((0xc != iport) && (0xe != iport)) { |
| 548 |
ldebug ("nport=%#x iport %#x = %#x\n",
|
| 549 |
nport, iport, retval); |
| 550 |
} |
| 551 |
|
| 552 |
return retval;
|
| 553 |
|
| 554 |
error:
|
| 555 |
return 0; |
| 556 |
} |
| 557 |
|
| 558 |
static IO_WRITE_PROTO(mixer_write_indexb)
|
| 559 |
{
|
| 560 |
SB16State *dsp = opaque; |
| 561 |
dsp->mixer_nreg = val; |
| 562 |
} |
| 563 |
|
| 564 |
static IO_WRITE_PROTO(mixer_write_datab)
|
| 565 |
{
|
| 566 |
SB16State *dsp = opaque; |
| 567 |
|
| 568 |
if (dsp->mixer_nreg > 0x83) |
| 569 |
return;
|
| 570 |
dsp->mixer_regs[dsp->mixer_nreg] = val; |
| 571 |
} |
| 572 |
|
| 573 |
static IO_WRITE_PROTO(mixer_write_indexw)
|
| 574 |
{
|
| 575 |
mixer_write_indexb (opaque, nport, val & 0xff);
|
| 576 |
mixer_write_datab (opaque, nport, (val >> 8) & 0xff); |
| 577 |
} |
| 578 |
|
| 579 |
static IO_READ_PROTO(mixer_read)
|
| 580 |
{
|
| 581 |
SB16State *dsp = opaque; |
| 582 |
return dsp->mixer_regs[dsp->mixer_nreg];
|
| 583 |
} |
| 584 |
|
| 585 |
void SB16_run (void) |
| 586 |
{
|
| 587 |
if (0 == dsp.speaker) |
| 588 |
return;
|
| 589 |
|
| 590 |
AUD_run (); |
| 591 |
} |
| 592 |
|
| 593 |
static int write_audio (uint32_t addr, int len, int size) |
| 594 |
{
|
| 595 |
int temp, net;
|
| 596 |
uint8_t tmpbuf[4096];
|
| 597 |
|
| 598 |
temp = size; |
| 599 |
|
| 600 |
net = 0;
|
| 601 |
|
| 602 |
while (temp) {
|
| 603 |
int left_till_end;
|
| 604 |
int to_copy;
|
| 605 |
int copied;
|
| 606 |
|
| 607 |
left_till_end = len - dsp.dma_pos; |
| 608 |
|
| 609 |
to_copy = MIN (temp, left_till_end); |
| 610 |
if (to_copy > sizeof(tmpbuf)) |
| 611 |
to_copy = sizeof(tmpbuf);
|
| 612 |
cpu_physical_memory_read(addr + dsp.dma_pos, tmpbuf, to_copy); |
| 613 |
copied = AUD_write (tmpbuf, to_copy); |
| 614 |
|
| 615 |
temp -= copied; |
| 616 |
dsp.dma_pos += copied; |
| 617 |
|
| 618 |
if (dsp.dma_pos == len) {
|
| 619 |
dsp.dma_pos = 0;
|
| 620 |
} |
| 621 |
|
| 622 |
net += copied; |
| 623 |
|
| 624 |
if (copied != to_copy)
|
| 625 |
return net;
|
| 626 |
} |
| 627 |
|
| 628 |
return net;
|
| 629 |
} |
| 630 |
|
| 631 |
static int SB_read_DMA (void *opaque, target_ulong addr, int size) |
| 632 |
{
|
| 633 |
SB16State *dsp = opaque; |
| 634 |
int free, till, copy, written;
|
| 635 |
|
| 636 |
if (0 == dsp->speaker) |
| 637 |
return 0; |
| 638 |
|
| 639 |
if (dsp->left_till_irq < 0) { |
| 640 |
dsp->left_till_irq += dsp->dma_buffer_size; |
| 641 |
return dsp->dma_pos;
|
| 642 |
} |
| 643 |
|
| 644 |
free = AUD_get_free (); |
| 645 |
|
| 646 |
if ((free <= 0) || (0 == size)) { |
| 647 |
return dsp->dma_pos;
|
| 648 |
} |
| 649 |
|
| 650 |
if (mix_block > 0) { |
| 651 |
copy = MIN (free, mix_block); |
| 652 |
} |
| 653 |
else {
|
| 654 |
copy = free; |
| 655 |
} |
| 656 |
|
| 657 |
till = dsp->left_till_irq; |
| 658 |
|
| 659 |
ldebug ("addr:%#010x free:%d till:%d size:%d\n",
|
| 660 |
addr, free, till, size); |
| 661 |
if (till <= copy) {
|
| 662 |
if (0 == dsp->dma_auto) { |
| 663 |
copy = till; |
| 664 |
} |
| 665 |
} |
| 666 |
|
| 667 |
written = write_audio (addr, size, copy); |
| 668 |
dsp->left_till_irq -= written; |
| 669 |
AUD_adjust_estimate (free - written); |
| 670 |
|
| 671 |
if (dsp->left_till_irq <= 0) { |
| 672 |
dsp->mixer_regs[0x82] |= dsp->mixer_regs[0x80]; |
| 673 |
if (0 == noirq) { |
| 674 |
ldebug ("request irq\n");
|
| 675 |
pic_set_irq(sb.irq, 1);
|
| 676 |
} |
| 677 |
|
| 678 |
if (0 == dsp->dma_auto) { |
| 679 |
control (0);
|
| 680 |
} |
| 681 |
} |
| 682 |
|
| 683 |
ldebug ("pos %5d free %5d size %5d till % 5d copy %5d dma size %5d\n",
|
| 684 |
dsp->dma_pos, free, size, dsp->left_till_irq, copy, |
| 685 |
dsp->dma_buffer_size); |
| 686 |
|
| 687 |
if (dsp->left_till_irq <= 0) { |
| 688 |
dsp->left_till_irq += dsp->dma_buffer_size; |
| 689 |
} |
| 690 |
|
| 691 |
return dsp->dma_pos;
|
| 692 |
} |
| 693 |
|
| 694 |
static int magic_of_irq (int irq) |
| 695 |
{
|
| 696 |
switch (irq) {
|
| 697 |
case 2: |
| 698 |
return 1; |
| 699 |
case 5: |
| 700 |
return 2; |
| 701 |
case 7: |
| 702 |
return 4; |
| 703 |
case 10: |
| 704 |
return 8; |
| 705 |
default:
|
| 706 |
log ("bad irq %d", irq);
|
| 707 |
return 2; |
| 708 |
} |
| 709 |
} |
| 710 |
|
| 711 |
#if 0
|
| 712 |
static int irq_of_magic (int magic)
|
| 713 |
{
|
| 714 |
switch (magic) {
|
| 715 |
case 1:
|
| 716 |
return 2;
|
| 717 |
case 2:
|
| 718 |
return 5;
|
| 719 |
case 4:
|
| 720 |
return 7;
|
| 721 |
case 8:
|
| 722 |
return 10;
|
| 723 |
default:
|
| 724 |
log ("bad irq magic %d", magic);
|
| 725 |
return 2;
|
| 726 |
}
|
| 727 |
}
|
| 728 |
#endif
|
| 729 |
|
| 730 |
void SB16_init (void) |
| 731 |
{
|
| 732 |
SB16State *s = &dsp; |
| 733 |
int i;
|
| 734 |
static const uint8_t dsp_write_ports[] = {0x6, 0xc}; |
| 735 |
static const uint8_t dsp_read_ports[] = {0x6, 0xa, 0xc, 0xd, 0xe, 0xf}; |
| 736 |
|
| 737 |
memset(s->mixer_regs, 0xff, sizeof(s->mixer_regs)); |
| 738 |
|
| 739 |
s->mixer_regs[0x0e] = ~0; |
| 740 |
s->mixer_regs[0x80] = magic_of_irq (sb.irq);
|
| 741 |
s->mixer_regs[0x81] = 0x20 | (sb.dma << 1); |
| 742 |
|
| 743 |
for (i = 0x30; i < 0x48; i++) { |
| 744 |
s->mixer_regs[i] = 0x20;
|
| 745 |
} |
| 746 |
|
| 747 |
for (i = 0; i < LENOFA (dsp_write_ports); i++) { |
| 748 |
register_ioport_write (sb.port + dsp_write_ports[i], 1, 1, dsp_write, s); |
| 749 |
} |
| 750 |
|
| 751 |
for (i = 0; i < LENOFA (dsp_read_ports); i++) { |
| 752 |
register_ioport_read (sb.port + dsp_read_ports[i], 1, 1, dsp_read, s); |
| 753 |
} |
| 754 |
|
| 755 |
register_ioport_write (sb.port + 0x4, 1, 1, mixer_write_indexb, s); |
| 756 |
register_ioport_write (sb.port + 0x4, 1, 2, mixer_write_indexw, s); |
| 757 |
register_ioport_read (sb.port + 0x5, 1, 1, mixer_read, s); |
| 758 |
register_ioport_write (sb.port + 0x5, 1, 1, mixer_write_datab, s); |
| 759 |
|
| 760 |
DMA_register_channel (sb.hdma, SB_read_DMA, s); |
| 761 |
DMA_register_channel (sb.dma, SB_read_DMA, s); |
| 762 |
} |