hw/gus.c

   1 /*
   2  * QEMU Proxy for Gravis Ultrasound GF1 emulation by Tibor "TS" Schütz
   3  *
   4  * Copyright (c) 2002-2005 Vassili Karpov (malc)
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a copy
   7  * of this software and associated documentation files (the "Software"), to deal
   8  * in the Software without restriction, including without limitation the rights
   9  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  10  * copies of the Software, and to permit persons to whom the Software is
  11  * furnished to do so, subject to the following conditions:
  12  *
  13  * The above copyright notice and this permission notice shall be included in
  14  * all copies or substantial portions of the Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  19  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  20  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  21  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  22  * THE SOFTWARE.
  23  */
  24 #include "hw.h"
  25 #include "audiodev.h"
  26 #include "audio/audio.h"
  27 #include "isa.h"
  28 #include "gusemu.h"
  29 #include "gustate.h"
  30
  31 #define dolog(...) AUD_log ("audio", __VA_ARGS__)
  32 #ifdef DEBUG
  33 #define ldebug(...) dolog (__VA_ARGS__)
  34 #else
  35 #define ldebug(...)
  36 #endif
  37
  38 #ifdef HOST_WORDS_BIGENDIAN
  39 #define GUS_ENDIANNESS 1
  40 #else
  41 #define GUS_ENDIANNESS 0
  42 #endif
  43
  44 #define IO_READ_PROTO(name) \
  45     static uint32_t name (void *opaque, uint32_t nport)
  46 #define IO_WRITE_PROTO(name) \
  47     static void name (void *opaque, uint32_t nport, uint32_t val)
  48
  49 typedef struct GUSState {
  50     ISADevice dev;
  51     GUSEmuState emu;
  52     QEMUSoundCard card;
  53     uint32_t freq;
  54     uint32_t port;
  55     int pos, left, shift, irqs;
  56     GUSsample *mixbuf;
  57     uint8_t himem[1024 * 1024 + 32 + 4096];
  58     int samples;
  59     SWVoiceOut *voice;
  60     int64_t last_ticks;
  61     qemu_irq pic;
  62 } GUSState;
  63
  64 IO_READ_PROTO (gus_readb)
  65 {
  66     GUSState *s = opaque;
  67
  68     return gus_read (&s->emu, nport, 1);
  69 }
  70
  71 IO_READ_PROTO (gus_readw)
  72 {
  73     GUSState *s = opaque;
  74
  75     return gus_read (&s->emu, nport, 2);
  76 }
  77
  78 IO_WRITE_PROTO (gus_writeb)
  79 {
  80     GUSState *s = opaque;
  81
  82     gus_write (&s->emu, nport, 1, val);
  83 }
  84
  85 IO_WRITE_PROTO (gus_writew)
  86 {
  87     GUSState *s = opaque;
  88
  89     gus_write (&s->emu, nport, 2, val);
  90 }
  91
  92 static int write_audio (GUSState *s, int samples)
  93 {
  94     int net = 0;
  95     int pos = s->pos;
  96
  97     while (samples) {
  98         int nbytes, wbytes, wsampl;
  99
 100         nbytes = samples << s->shift;
 101         wbytes = AUD_write (
 102             s->voice,
 103             s->mixbuf + (pos << (s->shift - 1)),
 104             nbytes
 105             );
 106
 107         if (wbytes) {
 108             wsampl = wbytes >> s->shift;
 109
 110             samples -= wsampl;
 111             pos = (pos + wsampl) % s->samples;
 112
 113             net += wsampl;
 114         }
 115         else {
 116             break;
 117         }
 118     }
 119
 120     return net;
 121 }
 122
 123 static void GUS_callback (void *opaque, int free)
 124 {
 125     int samples, to_play, net = 0;
 126     GUSState *s = opaque;
 127
 128     samples = free >> s->shift;
 129     to_play = audio_MIN (samples, s->left);
 130
 131     while (to_play) {
 132         int written = write_audio (s, to_play);
 133
 134         if (!written) {
 135             goto reset;
 136         }
 137
 138         s->left -= written;
 139         to_play -= written;
 140         samples -= written;
 141         net += written;
 142     }
 143
 144     samples = audio_MIN (samples, s->samples);
 145     if (samples) {
 146         gus_mixvoices (&s->emu, s->freq, samples, s->mixbuf);
 147
 148         while (samples) {
 149             int written = write_audio (s, samples);
 150             if (!written) {
 151                 break;
 152             }
 153             samples -= written;
 154             net += written;
 155         }
 156     }
 157     s->left = samples;
 158
 159  reset:
 160     gus_irqgen (&s->emu, muldiv64 (net, 1000000, s->freq));
 161 }
 162
 163 int GUS_irqrequest (GUSEmuState *emu, int hwirq, int n)
 164 {
 165     GUSState *s = emu->opaque;
 166     /* qemu_irq_lower (s->pic); */
 167     qemu_irq_raise (s->pic);
 168     s->irqs += n;
 169     ldebug ("irqrequest %d %d %d\n", hwirq, n, s->irqs);
 170     return n;
 171 }
 172
 173 void GUS_irqclear (GUSEmuState *emu, int hwirq)
 174 {
 175     GUSState *s = emu->opaque;
 176     ldebug ("irqclear %d %d\n", hwirq, s->irqs);
 177     qemu_irq_lower (s->pic);
 178     s->irqs -= 1;
 179 #ifdef IRQ_STORM
 180     if (s->irqs > 0) {
 181         qemu_irq_raise (s->pic[hwirq]);
 182     }
 183 #endif
 184 }
 185
 186 void GUS_dmarequest (GUSEmuState *der)
 187 {
 188     /* GUSState *s = (GUSState *) der; */
 189     ldebug ("dma request %d\n", der->gusdma);
 190     DMA_hold_DREQ (der->gusdma);
 191 }
 192
 193 static int GUS_read_DMA (void *opaque, int nchan, int dma_pos, int dma_len)
 194 {
 195     GUSState *s = opaque;
 196     char tmpbuf[4096];
 197     int pos = dma_pos, mode, left = dma_len - dma_pos;
 198
 199     ldebug ("read DMA %#x %d\n", dma_pos, dma_len);
 200     mode = DMA_get_channel_mode (s->emu.gusdma);
 201     while (left) {
 202         int to_copy = audio_MIN ((size_t) left, sizeof (tmpbuf));
 203         int copied;
 204
 205         ldebug ("left=%d to_copy=%d pos=%d\n", left, to_copy, pos);
 206         copied = DMA_read_memory (nchan, tmpbuf, pos, to_copy);
 207         gus_dma_transferdata (&s->emu, tmpbuf, copied, left == copied);
 208         left -= copied;
 209         pos += copied;
 210     }
 211
 212     if (0 == ((mode >> 4) & 1)) {
 213         DMA_release_DREQ (s->emu.gusdma);
 214     }
 215     return dma_len;
 216 }
 217
 218 static void GUS_save (QEMUFile *f, void *opaque)
 219 {
 220     GUSState *s = opaque;
 221
 222     qemu_put_be32 (f, s->pos);
 223     qemu_put_be32 (f, s->left);
 224     qemu_put_be32 (f, s->shift);
 225     qemu_put_be32 (f, s->irqs);
 226     qemu_put_be32 (f, s->samples);
 227     qemu_put_be64 (f, s->last_ticks);
 228     qemu_put_buffer (f, s->himem, sizeof (s->himem));
 229 }
 230
 231 static int GUS_load (QEMUFile *f, void *opaque, int version_id)
 232 {
 233     GUSState *s = opaque;
 234
 235     if (version_id != 2)
 236         return -EINVAL;
 237
 238     s->pos = qemu_get_be32 (f);
 239     s->left = qemu_get_be32 (f);
 240     s->shift = qemu_get_be32 (f);
 241     s->irqs = qemu_get_be32 (f);
 242     s->samples = qemu_get_be32 (f);
 243     s->last_ticks = qemu_get_be64 (f);
 244     qemu_get_buffer (f, s->himem, sizeof (s->himem));
 245     return 0;
 246 }
 247
 248 static int gus_initfn (ISADevice *dev)
 249 {
 250     GUSState *s = DO_UPCAST(GUSState, dev, dev);
 251     struct audsettings as;
 252
 253     AUD_register_card ("gus", &s->card);
 254
 255     as.freq = s->freq;
 256     as.nchannels = 2;
 257     as.fmt = AUD_FMT_S16;
 258     as.endianness = GUS_ENDIANNESS;
 259
 260     s->voice = AUD_open_out (
 261         &s->card,
 262         NULL,
 263         "gus",
 264         s,
 265         GUS_callback,
 266         &as
 267         );
 268
 269     if (!s->voice) {
 270         AUD_remove_card (&s->card);
 271         return -1;
 272     }
 273
 274     s->shift = 2;
 275     s->samples = AUD_get_buffer_size_out (s->voice) >> s->shift;
 276     s->mixbuf = qemu_mallocz (s->samples << s->shift);
 277
 278     register_ioport_write (s->port, 1, 1, gus_writeb, s);
 279     register_ioport_write (s->port, 1, 2, gus_writew, s);
 280
 281     register_ioport_read ((s->port + 0x100) & 0xf00, 1, 1, gus_readb, s);
 282     register_ioport_read ((s->port + 0x100) & 0xf00, 1, 2, gus_readw, s);
 283
 284     register_ioport_write (s->port + 6, 10, 1, gus_writeb, s);
 285     register_ioport_write (s->port + 6, 10, 2, gus_writew, s);
 286     register_ioport_read (s->port + 6, 10, 1, gus_readb, s);
 287     register_ioport_read (s->port + 6, 10, 2, gus_readw, s);
 288
 289
 290     register_ioport_write (s->port + 0x100, 8, 1, gus_writeb, s);
 291     register_ioport_write (s->port + 0x100, 8, 2, gus_writew, s);
 292     register_ioport_read (s->port + 0x100, 8, 1, gus_readb, s);
 293     register_ioport_read (s->port + 0x100, 8, 2, gus_readw, s);
 294
 295     DMA_register_channel (s->emu.gusdma, GUS_read_DMA, s);
 296     s->emu.himemaddr = s->himem;
 297     s->emu.gusdatapos = s->emu.himemaddr + 1024 * 1024 + 32;
 298     s->emu.opaque = s;
 299     isa_init_irq (dev, &s->pic, s->emu.gusirq);
 300
 301     AUD_set_active_out (s->voice, 1);
 302
 303     register_savevm ("gus", 0, 2, GUS_save, GUS_load, s);
 304     return 0;
 305 }
 306
 307 int GUS_init (qemu_irq *pic)
 308 {
 309     isa_create_simple ("gus");
 310     return 0;
 311 }
 312
 313 static ISADeviceInfo gus_info = {
 314     .qdev.name     = "gus",
 315     .qdev.desc     = "Gravis Ultrasound GF1",
 316     .qdev.size     = sizeof (GUSState),
 317     .init          = gus_initfn,
 318     .qdev.props    = (Property[]) {
 319         DEFINE_PROP_UINT32 ("freq",    GUSState, freq,        44100),
 320         DEFINE_PROP_HEX32  ("iobase",  GUSState, port,        0x240),
 321         DEFINE_PROP_UINT32 ("irq",     GUSState, emu.gusirq,  7),
 322         DEFINE_PROP_UINT32 ("dma",     GUSState, emu.gusdma,  3),
 323         DEFINE_PROP_END_OF_LIST (),
 324     },
 325 };
 326
 327 static void gus_register (void)
 328 {
 329     isa_qdev_register (&gus_info);
 330 }
 331 device_init (gus_register)