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 "qemu/osdep.h"
  25 #include "hw/hw.h"
  26 #include "hw/audio/audio.h"
  27 #include "audio/audio.h"
  28 #include "hw/isa/isa.h"
  29 #include "gusemu.h"
  30 #include "gustate.h"
  31
  32 #define dolog(...) AUD_log ("audio", __VA_ARGS__)
  33 #ifdef DEBUG
  34 #define ldebug(...) dolog (__VA_ARGS__)
  35 #else
  36 #define ldebug(...)
  37 #endif
  38
  39 #ifdef HOST_WORDS_BIGENDIAN
  40 #define GUS_ENDIANNESS 1
  41 #else
  42 #define GUS_ENDIANNESS 0
  43 #endif
  44
  45 #define TYPE_GUS "gus"
  46 #define GUS(obj) OBJECT_CHECK (GUSState, (obj), TYPE_GUS)
  47
  48 typedef struct GUSState {
  49     ISADevice dev;
  50     GUSEmuState emu;
  51     QEMUSoundCard card;
  52     uint32_t freq;
  53     uint32_t port;
  54     int pos, left, shift, irqs;
  55     GUSsample *mixbuf;
  56     uint8_t himem[1024 * 1024 + 32 + 4096];
  57     int samples;
  58     SWVoiceOut *voice;
  59     int64_t last_ticks;
  60     qemu_irq pic;
  61     IsaDma *isa_dma;
  62 } GUSState;
  63
  64 static uint32_t gus_readb(void *opaque, uint32_t nport)
  65 {
  66     GUSState *s = opaque;
  67
  68     return gus_read (&s->emu, nport, 1);
  69 }
  70
  71 static void gus_writeb(void *opaque, uint32_t nport, uint32_t val)
  72 {
  73     GUSState *s = opaque;
  74
  75     gus_write (&s->emu, nport, 1, val);
  76 }
  77
  78 static int write_audio (GUSState *s, int samples)
  79 {
  80     int net = 0;
  81     int pos = s->pos;
  82
  83     while (samples) {
  84         int nbytes, wbytes, wsampl;
  85
  86         nbytes = samples << s->shift;
  87         wbytes = AUD_write (
  88             s->voice,
  89             s->mixbuf + (pos << (s->shift - 1)),
  90             nbytes
  91             );
  92
  93         if (wbytes) {
  94             wsampl = wbytes >> s->shift;
  95
  96             samples -= wsampl;
  97             pos = (pos + wsampl) % s->samples;
  98
  99             net += wsampl;
 100         }
 101         else {
 102             break;
 103         }
 104     }
 105
 106     return net;
 107 }
 108
 109 static void GUS_callback (void *opaque, int free)
 110 {
 111     int samples, to_play, net = 0;
 112     GUSState *s = opaque;
 113
 114     samples = free >> s->shift;
 115     to_play = audio_MIN (samples, s->left);
 116
 117     while (to_play) {
 118         int written = write_audio (s, to_play);
 119
 120         if (!written) {
 121             goto reset;
 122         }
 123
 124         s->left -= written;
 125         to_play -= written;
 126         samples -= written;
 127         net += written;
 128     }
 129
 130     samples = audio_MIN (samples, s->samples);
 131     if (samples) {
 132         gus_mixvoices (&s->emu, s->freq, samples, s->mixbuf);
 133
 134         while (samples) {
 135             int written = write_audio (s, samples);
 136             if (!written) {
 137                 break;
 138             }
 139             samples -= written;
 140             net += written;
 141         }
 142     }
 143     s->left = samples;
 144
 145  reset:
 146     gus_irqgen (&s->emu, muldiv64 (net, 1000000, s->freq));
 147 }
 148
 149 int GUS_irqrequest (GUSEmuState *emu, int hwirq, int n)
 150 {
 151     GUSState *s = emu->opaque;
 152     /* qemu_irq_lower (s->pic); */
 153     qemu_irq_raise (s->pic);
 154     s->irqs += n;
 155     ldebug ("irqrequest %d %d %d\n", hwirq, n, s->irqs);
 156     return n;
 157 }
 158
 159 void GUS_irqclear (GUSEmuState *emu, int hwirq)
 160 {
 161     GUSState *s = emu->opaque;
 162     ldebug ("irqclear %d %d\n", hwirq, s->irqs);
 163     qemu_irq_lower (s->pic);
 164     s->irqs -= 1;
 165 #ifdef IRQ_STORM
 166     if (s->irqs > 0) {
 167         qemu_irq_raise (s->pic[hwirq]);
 168     }
 169 #endif
 170 }
 171
 172 void GUS_dmarequest (GUSEmuState *emu)
 173 {
 174     GUSState *s = emu->opaque;
 175     IsaDmaClass *k = ISADMA_GET_CLASS(s->isa_dma);
 176     ldebug ("dma request %d\n", der->gusdma);
 177     k->hold_DREQ(s->isa_dma, s->emu.gusdma);
 178 }
 179
 180 static int GUS_read_DMA (void *opaque, int nchan, int dma_pos, int dma_len)
 181 {
 182     GUSState *s = opaque;
 183     IsaDmaClass *k = ISADMA_GET_CLASS(s->isa_dma);
 184     char tmpbuf[4096];
 185     int pos = dma_pos, mode, left = dma_len - dma_pos;
 186
 187     ldebug ("read DMA %#x %d\n", dma_pos, dma_len);
 188     mode = k->has_autoinitialization(s->isa_dma, s->emu.gusdma);
 189     while (left) {
 190         int to_copy = audio_MIN ((size_t) left, sizeof (tmpbuf));
 191         int copied;
 192
 193         ldebug ("left=%d to_copy=%d pos=%d\n", left, to_copy, pos);
 194         copied = k->read_memory(s->isa_dma, nchan, tmpbuf, pos, to_copy);
 195         gus_dma_transferdata (&s->emu, tmpbuf, copied, left == copied);
 196         left -= copied;
 197         pos += copied;
 198     }
 199
 200     if (((mode >> 4) & 1) == 0) {
 201         k->release_DREQ(s->isa_dma, s->emu.gusdma);
 202     }
 203     return dma_len;
 204 }
 205
 206 static const VMStateDescription vmstate_gus = {
 207     .name = "gus",
 208     .version_id = 2,
 209     .minimum_version_id = 2,
 210     .fields = (VMStateField[]) {
 211         VMSTATE_INT32 (pos, GUSState),
 212         VMSTATE_INT32 (left, GUSState),
 213         VMSTATE_INT32 (shift, GUSState),
 214         VMSTATE_INT32 (irqs, GUSState),
 215         VMSTATE_INT32 (samples, GUSState),
 216         VMSTATE_INT64 (last_ticks, GUSState),
 217         VMSTATE_BUFFER (himem, GUSState),
 218         VMSTATE_END_OF_LIST ()
 219     }
 220 };
 221
 222 static const MemoryRegionPortio gus_portio_list1[] = {
 223     {0x000,  1, 1, .write = gus_writeb },
 224     {0x006, 10, 1, .read = gus_readb, .write = gus_writeb },
 225     {0x100,  8, 1, .read = gus_readb, .write = gus_writeb },
 226     PORTIO_END_OF_LIST (),
 227 };
 228
 229 static const MemoryRegionPortio gus_portio_list2[] = {
 230     {0, 2, 1, .read = gus_readb },
 231     PORTIO_END_OF_LIST (),
 232 };
 233
 234 static void gus_realizefn (DeviceState *dev, Error **errp)
 235 {
 236     ISADevice *d = ISA_DEVICE(dev);
 237     GUSState *s = GUS (dev);
 238     IsaDmaClass *k;
 239     struct audsettings as;
 240
 241     AUD_register_card ("gus", &s->card);
 242
 243     as.freq = s->freq;
 244     as.nchannels = 2;
 245     as.fmt = AUD_FMT_S16;
 246     as.endianness = GUS_ENDIANNESS;
 247
 248     s->voice = AUD_open_out (
 249         &s->card,
 250         NULL,
 251         "gus",
 252         s,
 253         GUS_callback,
 254         &as
 255         );
 256
 257     if (!s->voice) {
 258         AUD_remove_card (&s->card);
 259         error_setg(errp, "No voice");
 260         return;
 261     }
 262
 263     s->shift = 2;
 264     s->samples = AUD_get_buffer_size_out (s->voice) >> s->shift;
 265     s->mixbuf = g_malloc0 (s->samples << s->shift);
 266
 267     isa_register_portio_list (d, s->port, gus_portio_list1, s, "gus");
 268     isa_register_portio_list (d, (s->port + 0x100) & 0xf00,
 269                               gus_portio_list2, s, "gus");
 270
 271     s->isa_dma = isa_get_dma(isa_bus_from_device(d), s->emu.gusdma);
 272     k = ISADMA_GET_CLASS(s->isa_dma);
 273     k->register_channel(s->isa_dma, s->emu.gusdma, GUS_read_DMA, s);
 274     s->emu.himemaddr = s->himem;
 275     s->emu.gusdatapos = s->emu.himemaddr + 1024 * 1024 + 32;
 276     s->emu.opaque = s;
 277     isa_init_irq (d, &s->pic, s->emu.gusirq);
 278
 279     AUD_set_active_out (s->voice, 1);
 280 }
 281
 282 static int GUS_init (ISABus *bus)
 283 {
 284     isa_create_simple (bus, TYPE_GUS);
 285     return 0;
 286 }
 287
 288 static Property gus_properties[] = {
 289     DEFINE_PROP_UINT32 ("freq",    GUSState, freq,        44100),
 290     DEFINE_PROP_UINT32 ("iobase",  GUSState, port,        0x240),
 291     DEFINE_PROP_UINT32 ("irq",     GUSState, emu.gusirq,  7),
 292     DEFINE_PROP_UINT32 ("dma",     GUSState, emu.gusdma,  3),
 293     DEFINE_PROP_END_OF_LIST (),
 294 };
 295
 296 static void gus_class_initfn (ObjectClass *klass, void *data)
 297 {
 298     DeviceClass *dc = DEVICE_CLASS (klass);
 299
 300     dc->realize = gus_realizefn;
 301     set_bit(DEVICE_CATEGORY_SOUND, dc->categories);
 302     dc->desc = "Gravis Ultrasound GF1";
 303     dc->vmsd = &vmstate_gus;
 304     dc->props = gus_properties;
 305 }
 306
 307 static const TypeInfo gus_info = {
 308     .name          = TYPE_GUS,
 309     .parent        = TYPE_ISA_DEVICE,
 310     .instance_size = sizeof (GUSState),
 311     .class_init    = gus_class_initfn,
 312 };
 313
 314 static void gus_register_types (void)
 315 {
 316     type_register_static (&gus_info);
 317     isa_register_soundhw("gus", "Gravis Ultrasound GF1", GUS_init);
 318 }
 319
 320 type_init (gus_register_types)