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
  25 #include "qemu/osdep.h"
  26 #include "qapi/error.h"
  27 #include "qemu/module.h"
  28 #include "hw/audio/soundhw.h"
  29 #include "audio/audio.h"
  30 #include "hw/irq.h"
  31 #include "hw/isa/isa.h"
  32 #include "migration/vmstate.h"
  33 #include "gusemu.h"
  34 #include "gustate.h"
  35
  36 #define dolog(...) AUD_log ("audio", __VA_ARGS__)
  37 #ifdef DEBUG
  38 #define ldebug(...) dolog (__VA_ARGS__)
  39 #else
  40 #define ldebug(...)
  41 #endif
  42
  43 #ifdef HOST_WORDS_BIGENDIAN
  44 #define GUS_ENDIANNESS 1
  45 #else
  46 #define GUS_ENDIANNESS 0
  47 #endif
  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     int16_t *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     IsaDma *isa_dma;
  66     PortioList portio_list1;
  67     PortioList portio_list2;
  68 } GUSState;
  69
  70 static uint32_t gus_readb(void *opaque, uint32_t nport)
  71 {
  72     GUSState *s = opaque;
  73
  74     return gus_read (&s->emu, nport, 1);
  75 }
  76
  77 static void gus_writeb(void *opaque, uint32_t nport, uint32_t val)
  78 {
  79     GUSState *s = opaque;
  80
  81     gus_write (&s->emu, nport, 1, val);
  82 }
  83
  84 static int write_audio (GUSState *s, int samples)
  85 {
  86     int net = 0;
  87     int pos = s->pos;
  88
  89     while (samples) {
  90         int nbytes, wbytes, wsampl;
  91
  92         nbytes = samples << s->shift;
  93         wbytes = AUD_write (
  94             s->voice,
  95             s->mixbuf + (pos << (s->shift - 1)),
  96             nbytes
  97             );
  98
  99         if (wbytes) {
 100             wsampl = wbytes >> s->shift;
 101
 102             samples -= wsampl;
 103             pos = (pos + wsampl) % s->samples;
 104
 105             net += wsampl;
 106         }
 107         else {
 108             break;
 109         }
 110     }
 111
 112     return net;
 113 }
 114
 115 static void GUS_callback (void *opaque, int free)
 116 {
 117     int samples, to_play, net = 0;
 118     GUSState *s = opaque;
 119
 120     samples = free >> s->shift;
 121     to_play = audio_MIN (samples, s->left);
 122
 123     while (to_play) {
 124         int written = write_audio (s, to_play);
 125
 126         if (!written) {
 127             goto reset;
 128         }
 129
 130         s->left -= written;
 131         to_play -= written;
 132         samples -= written;
 133         net += written;
 134     }
 135
 136     samples = audio_MIN (samples, s->samples);
 137     if (samples) {
 138         gus_mixvoices (&s->emu, s->freq, samples, s->mixbuf);
 139
 140         while (samples) {
 141             int written = write_audio (s, samples);
 142             if (!written) {
 143                 break;
 144             }
 145             samples -= written;
 146             net += written;
 147         }
 148     }
 149     s->left = samples;
 150
 151  reset:
 152     gus_irqgen (&s->emu, (uint64_t)net * 1000000 / s->freq);
 153 }
 154
 155 int GUS_irqrequest (GUSEmuState *emu, int hwirq, int n)
 156 {
 157     GUSState *s = emu->opaque;
 158     /* qemu_irq_lower (s->pic); */
 159     qemu_irq_raise (s->pic);
 160     s->irqs += n;
 161     ldebug ("irqrequest %d %d %d\n", hwirq, n, s->irqs);
 162     return n;
 163 }
 164
 165 void GUS_irqclear (GUSEmuState *emu, int hwirq)
 166 {
 167     GUSState *s = emu->opaque;
 168     ldebug ("irqclear %d %d\n", hwirq, s->irqs);
 169     qemu_irq_lower (s->pic);
 170     s->irqs -= 1;
 171 #ifdef IRQ_STORM
 172     if (s->irqs > 0) {
 173         qemu_irq_raise (s->pic[hwirq]);
 174     }
 175 #endif
 176 }
 177
 178 void GUS_dmarequest (GUSEmuState *emu)
 179 {
 180     GUSState *s = emu->opaque;
 181     IsaDmaClass *k = ISADMA_GET_CLASS(s->isa_dma);
 182     ldebug ("dma request %d\n", der->gusdma);
 183     k->hold_DREQ(s->isa_dma, s->emu.gusdma);
 184 }
 185
 186 static int GUS_read_DMA (void *opaque, int nchan, int dma_pos, int dma_len)
 187 {
 188     GUSState *s = opaque;
 189     IsaDmaClass *k = ISADMA_GET_CLASS(s->isa_dma);
 190     char tmpbuf[4096];
 191     int pos = dma_pos, mode, left = dma_len - dma_pos;
 192
 193     ldebug ("read DMA %#x %d\n", dma_pos, dma_len);
 194     mode = k->has_autoinitialization(s->isa_dma, s->emu.gusdma);
 195     while (left) {
 196         int to_copy = audio_MIN ((size_t) left, sizeof (tmpbuf));
 197         int copied;
 198
 199         ldebug ("left=%d to_copy=%d pos=%d\n", left, to_copy, pos);
 200         copied = k->read_memory(s->isa_dma, nchan, tmpbuf, pos, to_copy);
 201         gus_dma_transferdata (&s->emu, tmpbuf, copied, left == copied);
 202         left -= copied;
 203         pos += copied;
 204     }
 205
 206     if (((mode >> 4) & 1) == 0) {
 207         k->release_DREQ(s->isa_dma, s->emu.gusdma);
 208     }
 209     return dma_len;
 210 }
 211
 212 static const VMStateDescription vmstate_gus = {
 213     .name = "gus",
 214     .version_id = 2,
 215     .minimum_version_id = 2,
 216     .fields = (VMStateField[]) {
 217         VMSTATE_INT32 (pos, GUSState),
 218         VMSTATE_INT32 (left, GUSState),
 219         VMSTATE_INT32 (shift, GUSState),
 220         VMSTATE_INT32 (irqs, GUSState),
 221         VMSTATE_INT32 (samples, GUSState),
 222         VMSTATE_INT64 (last_ticks, GUSState),
 223         VMSTATE_BUFFER (himem, GUSState),
 224         VMSTATE_END_OF_LIST ()
 225     }
 226 };
 227
 228 static const MemoryRegionPortio gus_portio_list1[] = {
 229     {0x000,  1, 1, .write = gus_writeb },
 230     {0x006, 10, 1, .read = gus_readb, .write = gus_writeb },
 231     {0x100,  8, 1, .read = gus_readb, .write = gus_writeb },
 232     PORTIO_END_OF_LIST (),
 233 };
 234
 235 static const MemoryRegionPortio gus_portio_list2[] = {
 236     {0, 2, 1, .read = gus_readb },
 237     PORTIO_END_OF_LIST (),
 238 };
 239
 240 static void gus_realizefn (DeviceState *dev, Error **errp)
 241 {
 242     ISADevice *d = ISA_DEVICE(dev);
 243     GUSState *s = GUS (dev);
 244     IsaDmaClass *k;
 245     struct audsettings as;
 246
 247     s->isa_dma = isa_get_dma(isa_bus_from_device(d), s->emu.gusdma);
 248     if (!s->isa_dma) {
 249         error_setg(errp, "ISA controller does not support DMA");
 250         return;
 251     }
 252
 253     AUD_register_card ("gus", &s->card);
 254
 255     as.freq = s->freq;
 256     as.nchannels = 2;
 257     as.fmt = AUDIO_FORMAT_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         error_setg(errp, "No voice");
 272         return;
 273     }
 274
 275     s->shift = 2;
 276     s->samples = AUD_get_buffer_size_out (s->voice) >> s->shift;
 277     s->mixbuf = g_malloc0 (s->samples << s->shift);
 278
 279     isa_register_portio_list(d, &s->portio_list1, s->port,
 280                              gus_portio_list1, s, "gus");
 281     isa_register_portio_list(d, &s->portio_list2, (s->port + 0x100) & 0xf00,
 282                              gus_portio_list2, s, "gus");
 283
 284     k = ISADMA_GET_CLASS(s->isa_dma);
 285     k->register_channel(s->isa_dma, s->emu.gusdma, GUS_read_DMA, s);
 286     s->emu.himemaddr = s->himem;
 287     s->emu.gusdatapos = s->emu.himemaddr + 1024 * 1024 + 32;
 288     s->emu.opaque = s;
 289     isa_init_irq (d, &s->pic, s->emu.gusirq);
 290
 291     AUD_set_active_out (s->voice, 1);
 292 }
 293
 294 static int GUS_init (ISABus *bus)
 295 {
 296     isa_create_simple (bus, TYPE_GUS);
 297     return 0;
 298 }
 299
 300 static Property gus_properties[] = {
 301     DEFINE_PROP_UINT32 ("freq",    GUSState, freq,        44100),
 302     DEFINE_PROP_UINT32 ("iobase",  GUSState, port,        0x240),
 303     DEFINE_PROP_UINT32 ("irq",     GUSState, emu.gusirq,  7),
 304     DEFINE_PROP_UINT32 ("dma",     GUSState, emu.gusdma,  3),
 305     DEFINE_PROP_END_OF_LIST (),
 306 };
 307
 308 static void gus_class_initfn (ObjectClass *klass, void *data)
 309 {
 310     DeviceClass *dc = DEVICE_CLASS (klass);
 311
 312     dc->realize = gus_realizefn;
 313     set_bit(DEVICE_CATEGORY_SOUND, dc->categories);
 314     dc->desc = "Gravis Ultrasound GF1";
 315     dc->vmsd = &vmstate_gus;
 316     dc->props = gus_properties;
 317 }
 318
 319 static const TypeInfo gus_info = {
 320     .name          = TYPE_GUS,
 321     .parent        = TYPE_ISA_DEVICE,
 322     .instance_size = sizeof (GUSState),
 323     .class_init    = gus_class_initfn,
 324 };
 325
 326 static void gus_register_types (void)
 327 {
 328     type_register_static (&gus_info);
 329     isa_register_soundhw("gus", "Gravis Ultrasound GF1", GUS_init);
 330 }
 331
 332 type_init (gus_register_types)