hw/audio/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/hw.h"
  25 #include "hw/audio/audio.h"
  26 #include "audio/audio.h"
  27 #include "hw/isa/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 #define TYPE_GUS "gus"
  50 #define GUS(obj) OBJECT_CHECK (GUSState, (obj), TYPE_GUS)
  51
  52 typedef struct GUSState {
  53     ISADevice dev;
  54     GUSEmuState emu;
  55     QEMUSoundCard card;
  56     uint32_t freq;
  57     uint32_t port;
  58     int pos, left, shift, irqs;
  59     GUSsample *mixbuf;
  60     uint8_t himem[1024 * 1024 + 32 + 4096];
  61     int samples;
  62     SWVoiceOut *voice;
  63     int64_t last_ticks;
  64     qemu_irq pic;
  65 } GUSState;
  66
  67 IO_READ_PROTO (gus_readb)
  68 {
  69     GUSState *s = opaque;
  70
  71     return gus_read (&s->emu, nport, 1);
  72 }
  73
  74 IO_READ_PROTO (gus_readw)
  75 {
  76     GUSState *s = opaque;
  77
  78     return gus_read (&s->emu, nport, 2);
  79 }
  80
  81 IO_WRITE_PROTO (gus_writeb)
  82 {
  83     GUSState *s = opaque;
  84
  85     gus_write (&s->emu, nport, 1, val);
  86 }
  87
  88 IO_WRITE_PROTO (gus_writew)
  89 {
  90     GUSState *s = opaque;
  91
  92     gus_write (&s->emu, nport, 2, val);
  93 }
  94
  95 static int write_audio (GUSState *s, int samples)
  96 {
  97     int net = 0;
  98     int pos = s->pos;
  99
 100     while (samples) {
 101         int nbytes, wbytes, wsampl;
 102
 103         nbytes = samples << s->shift;
 104         wbytes = AUD_write (
 105             s->voice,
 106             s->mixbuf + (pos << (s->shift - 1)),
 107             nbytes
 108             );
 109
 110         if (wbytes) {
 111             wsampl = wbytes >> s->shift;
 112
 113             samples -= wsampl;
 114             pos = (pos + wsampl) % s->samples;
 115
 116             net += wsampl;
 117         }
 118         else {
 119             break;
 120         }
 121     }
 122
 123     return net;
 124 }
 125
 126 static void GUS_callback (void *opaque, int free)
 127 {
 128     int samples, to_play, net = 0;
 129     GUSState *s = opaque;
 130
 131     samples = free >> s->shift;
 132     to_play = audio_MIN (samples, s->left);
 133
 134     while (to_play) {
 135         int written = write_audio (s, to_play);
 136
 137         if (!written) {
 138             goto reset;
 139         }
 140
 141         s->left -= written;
 142         to_play -= written;
 143         samples -= written;
 144         net += written;
 145     }
 146
 147     samples = audio_MIN (samples, s->samples);
 148     if (samples) {
 149         gus_mixvoices (&s->emu, s->freq, samples, s->mixbuf);
 150
 151         while (samples) {
 152             int written = write_audio (s, samples);
 153             if (!written) {
 154                 break;
 155             }
 156             samples -= written;
 157             net += written;
 158         }
 159     }
 160     s->left = samples;
 161
 162  reset:
 163     gus_irqgen (&s->emu, muldiv64 (net, 1000000, s->freq));
 164 }
 165
 166 int GUS_irqrequest (GUSEmuState *emu, int hwirq, int n)
 167 {
 168     GUSState *s = emu->opaque;
 169     /* qemu_irq_lower (s->pic); */
 170     qemu_irq_raise (s->pic);
 171     s->irqs += n;
 172     ldebug ("irqrequest %d %d %d\n", hwirq, n, s->irqs);
 173     return n;
 174 }
 175
 176 void GUS_irqclear (GUSEmuState *emu, int hwirq)
 177 {
 178     GUSState *s = emu->opaque;
 179     ldebug ("irqclear %d %d\n", hwirq, s->irqs);
 180     qemu_irq_lower (s->pic);
 181     s->irqs -= 1;
 182 #ifdef IRQ_STORM
 183     if (s->irqs > 0) {
 184         qemu_irq_raise (s->pic[hwirq]);
 185     }
 186 #endif
 187 }
 188
 189 void GUS_dmarequest (GUSEmuState *der)
 190 {
 191     /* GUSState *s = (GUSState *) der; */
 192     ldebug ("dma request %d\n", der->gusdma);
 193     DMA_hold_DREQ (der->gusdma);
 194 }
 195
 196 static int GUS_read_DMA (void *opaque, int nchan, int dma_pos, int dma_len)
 197 {
 198     GUSState *s = opaque;
 199     char tmpbuf[4096];
 200     int pos = dma_pos, mode, left = dma_len - dma_pos;
 201
 202     ldebug ("read DMA %#x %d\n", dma_pos, dma_len);
 203     mode = DMA_get_channel_mode (s->emu.gusdma);
 204     while (left) {
 205         int to_copy = audio_MIN ((size_t) left, sizeof (tmpbuf));
 206         int copied;
 207
 208         ldebug ("left=%d to_copy=%d pos=%d\n", left, to_copy, pos);
 209         copied = DMA_read_memory (nchan, tmpbuf, pos, to_copy);
 210         gus_dma_transferdata (&s->emu, tmpbuf, copied, left == copied);
 211         left -= copied;
 212         pos += copied;
 213     }
 214
 215     if (0 == ((mode >> 4) & 1)) {
 216         DMA_release_DREQ (s->emu.gusdma);
 217     }
 218     return dma_len;
 219 }
 220
 221 static const VMStateDescription vmstate_gus = {
 222     .name = "gus",
 223     .version_id = 2,
 224     .minimum_version_id = 2,
 225     .minimum_version_id_old = 2,
 226     .fields      = (VMStateField []) {
 227         VMSTATE_INT32 (pos, GUSState),
 228         VMSTATE_INT32 (left, GUSState),
 229         VMSTATE_INT32 (shift, GUSState),
 230         VMSTATE_INT32 (irqs, GUSState),
 231         VMSTATE_INT32 (samples, GUSState),
 232         VMSTATE_INT64 (last_ticks, GUSState),
 233         VMSTATE_BUFFER (himem, GUSState),
 234         VMSTATE_END_OF_LIST ()
 235     }
 236 };
 237
 238 static const MemoryRegionPortio gus_portio_list1[] = {
 239     {0x000,  1, 1, .write = gus_writeb },
 240     {0x000,  1, 2, .write = gus_writew },
 241     {0x006, 10, 1, .read = gus_readb, .write = gus_writeb },
 242     {0x006, 10, 2, .read = gus_readw, .write = gus_writew },
 243     {0x100,  8, 1, .read = gus_readb, .write = gus_writeb },
 244     {0x100,  8, 2, .read = gus_readw, .write = gus_writew },
 245     PORTIO_END_OF_LIST (),
 246 };
 247
 248 static const MemoryRegionPortio gus_portio_list2[] = {
 249     {0, 1, 1, .read = gus_readb },
 250     {0, 1, 2, .read = gus_readw },
 251     PORTIO_END_OF_LIST (),
 252 };
 253
 254 static void gus_realizefn (DeviceState *dev, Error **errp)
 255 {
 256     ISADevice *d = ISA_DEVICE(dev);
 257     GUSState *s = GUS (dev);
 258     struct audsettings as;
 259
 260     AUD_register_card ("gus", &s->card);
 261
 262     as.freq = s->freq;
 263     as.nchannels = 2;
 264     as.fmt = AUD_FMT_S16;
 265     as.endianness = GUS_ENDIANNESS;
 266
 267     s->voice = AUD_open_out (
 268         &s->card,
 269         NULL,
 270         "gus",
 271         s,
 272         GUS_callback,
 273         &as
 274         );
 275
 276     if (!s->voice) {
 277         AUD_remove_card (&s->card);
 278         error_setg(errp, "No voice");
 279         return;
 280     }
 281
 282     s->shift = 2;
 283     s->samples = AUD_get_buffer_size_out (s->voice) >> s->shift;
 284     s->mixbuf = g_malloc0 (s->samples << s->shift);
 285
 286     isa_register_portio_list (d, s->port, gus_portio_list1, s, "gus");
 287     isa_register_portio_list (d, (s->port + 0x100) & 0xf00,
 288                               gus_portio_list2, s, "gus");
 289
 290     DMA_register_channel (s->emu.gusdma, GUS_read_DMA, s);
 291     s->emu.himemaddr = s->himem;
 292     s->emu.gusdatapos = s->emu.himemaddr + 1024 * 1024 + 32;
 293     s->emu.opaque = s;
 294     isa_init_irq (d, &s->pic, s->emu.gusirq);
 295
 296     AUD_set_active_out (s->voice, 1);
 297 }
 298
 299 static int GUS_init (ISABus *bus)
 300 {
 301     isa_create_simple (bus, TYPE_GUS);
 302     return 0;
 303 }
 304
 305 static Property gus_properties[] = {
 306     DEFINE_PROP_UINT32 ("freq",    GUSState, freq,        44100),
 307     DEFINE_PROP_HEX32  ("iobase",  GUSState, port,        0x240),
 308     DEFINE_PROP_UINT32 ("irq",     GUSState, emu.gusirq,  7),
 309     DEFINE_PROP_UINT32 ("dma",     GUSState, emu.gusdma,  3),
 310     DEFINE_PROP_END_OF_LIST (),
 311 };
 312
 313 static void gus_class_initfn (ObjectClass *klass, void *data)
 314 {
 315     DeviceClass *dc = DEVICE_CLASS (klass);
 316
 317     dc->realize = gus_realizefn;
 318     set_bit(DEVICE_CATEGORY_SOUND, dc->categories);
 319     dc->desc = "Gravis Ultrasound GF1";
 320     dc->vmsd = &vmstate_gus;
 321     dc->props = gus_properties;
 322 }
 323
 324 static const TypeInfo gus_info = {
 325     .name          = TYPE_GUS,
 326     .parent        = TYPE_ISA_DEVICE,
 327     .instance_size = sizeof (GUSState),
 328     .class_init    = gus_class_initfn,
 329 };
 330
 331 static void gus_register_types (void)
 332 {
 333     type_register_static (&gus_info);
 334     isa_register_soundhw("gus", "Gravis Ultrasound GF1", GUS_init);
 335 }
 336
 337 type_init (gus_register_types)