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 "qapi/error.h"
  26 #include "hw/hw.h"
  27 #include "hw/audio/audio.h"
  28 #include "audio/audio.h"
  29 #include "hw/isa/isa.h"
  30 #include "gusemu.h"
  31 #include "gustate.h"
  32
  33 #define dolog(...) AUD_log ("audio", __VA_ARGS__)
  34 #ifdef DEBUG
  35 #define ldebug(...) dolog (__VA_ARGS__)
  36 #else
  37 #define ldebug(...)
  38 #endif
  39
  40 #ifdef HOST_WORDS_BIGENDIAN
  41 #define GUS_ENDIANNESS 1
  42 #else
  43 #define GUS_ENDIANNESS 0
  44 #endif
  45
  46 #define TYPE_GUS "gus"
  47 #define GUS(obj) OBJECT_CHECK (GUSState, (obj), TYPE_GUS)
  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     IsaDma *isa_dma;
  63 } GUSState;
  64
  65 static uint32_t gus_readb(void *opaque, uint32_t nport)
  66 {
  67     GUSState *s = opaque;
  68
  69     return gus_read (&s->emu, nport, 1);
  70 }
  71
  72 static void gus_writeb(void *opaque, uint32_t nport, uint32_t val)
  73 {
  74     GUSState *s = opaque;
  75
  76     gus_write (&s->emu, nport, 1, val);
  77 }
  78
  79 static int write_audio (GUSState *s, int samples)
  80 {
  81     int net = 0;
  82     int pos = s->pos;
  83
  84     while (samples) {
  85         int nbytes, wbytes, wsampl;
  86
  87         nbytes = samples << s->shift;
  88         wbytes = AUD_write (
  89             s->voice,
  90             s->mixbuf + (pos << (s->shift - 1)),
  91             nbytes
  92             );
  93
  94         if (wbytes) {
  95             wsampl = wbytes >> s->shift;
  96
  97             samples -= wsampl;
  98             pos = (pos + wsampl) % s->samples;
  99
 100             net += wsampl;
 101         }
 102         else {
 103             break;
 104         }
 105     }
 106
 107     return net;
 108 }
 109
 110 static void GUS_callback (void *opaque, int free)
 111 {
 112     int samples, to_play, net = 0;
 113     GUSState *s = opaque;
 114
 115     samples = free >> s->shift;
 116     to_play = audio_MIN (samples, s->left);
 117
 118     while (to_play) {
 119         int written = write_audio (s, to_play);
 120
 121         if (!written) {
 122             goto reset;
 123         }
 124
 125         s->left -= written;
 126         to_play -= written;
 127         samples -= written;
 128         net += written;
 129     }
 130
 131     samples = audio_MIN (samples, s->samples);
 132     if (samples) {
 133         gus_mixvoices (&s->emu, s->freq, samples, s->mixbuf);
 134
 135         while (samples) {
 136             int written = write_audio (s, samples);
 137             if (!written) {
 138                 break;
 139             }
 140             samples -= written;
 141             net += written;
 142         }
 143     }
 144     s->left = samples;
 145
 146  reset:
 147     gus_irqgen (&s->emu, (uint64_t)net * 1000000 / s->freq);
 148 }
 149
 150 int GUS_irqrequest (GUSEmuState *emu, int hwirq, int n)
 151 {
 152     GUSState *s = emu->opaque;
 153     /* qemu_irq_lower (s->pic); */
 154     qemu_irq_raise (s->pic);
 155     s->irqs += n;
 156     ldebug ("irqrequest %d %d %d\n", hwirq, n, s->irqs);
 157     return n;
 158 }
 159
 160 void GUS_irqclear (GUSEmuState *emu, int hwirq)
 161 {
 162     GUSState *s = emu->opaque;
 163     ldebug ("irqclear %d %d\n", hwirq, s->irqs);
 164     qemu_irq_lower (s->pic);
 165     s->irqs -= 1;
 166 #ifdef IRQ_STORM
 167     if (s->irqs > 0) {
 168         qemu_irq_raise (s->pic[hwirq]);
 169     }
 170 #endif
 171 }
 172
 173 void GUS_dmarequest (GUSEmuState *emu)
 174 {
 175     GUSState *s = emu->opaque;
 176     IsaDmaClass *k = ISADMA_GET_CLASS(s->isa_dma);
 177     ldebug ("dma request %d\n", der->gusdma);
 178     k->hold_DREQ(s->isa_dma, s->emu.gusdma);
 179 }
 180
 181 static int GUS_read_DMA (void *opaque, int nchan, int dma_pos, int dma_len)
 182 {
 183     GUSState *s = opaque;
 184     IsaDmaClass *k = ISADMA_GET_CLASS(s->isa_dma);
 185     char tmpbuf[4096];
 186     int pos = dma_pos, mode, left = dma_len - dma_pos;
 187
 188     ldebug ("read DMA %#x %d\n", dma_pos, dma_len);
 189     mode = k->has_autoinitialization(s->isa_dma, s->emu.gusdma);
 190     while (left) {
 191         int to_copy = audio_MIN ((size_t) left, sizeof (tmpbuf));
 192         int copied;
 193
 194         ldebug ("left=%d to_copy=%d pos=%d\n", left, to_copy, pos);
 195         copied = k->read_memory(s->isa_dma, nchan, tmpbuf, pos, to_copy);
 196         gus_dma_transferdata (&s->emu, tmpbuf, copied, left == copied);
 197         left -= copied;
 198         pos += copied;
 199     }
 200
 201     if (((mode >> 4) & 1) == 0) {
 202         k->release_DREQ(s->isa_dma, s->emu.gusdma);
 203     }
 204     return dma_len;
 205 }
 206
 207 static const VMStateDescription vmstate_gus = {
 208     .name = "gus",
 209     .version_id = 2,
 210     .minimum_version_id = 2,
 211     .fields = (VMStateField[]) {
 212         VMSTATE_INT32 (pos, GUSState),
 213         VMSTATE_INT32 (left, GUSState),
 214         VMSTATE_INT32 (shift, GUSState),
 215         VMSTATE_INT32 (irqs, GUSState),
 216         VMSTATE_INT32 (samples, GUSState),
 217         VMSTATE_INT64 (last_ticks, GUSState),
 218         VMSTATE_BUFFER (himem, GUSState),
 219         VMSTATE_END_OF_LIST ()
 220     }
 221 };
 222
 223 static const MemoryRegionPortio gus_portio_list1[] = {
 224     {0x000,  1, 1, .write = gus_writeb },
 225     {0x006, 10, 1, .read = gus_readb, .write = gus_writeb },
 226     {0x100,  8, 1, .read = gus_readb, .write = gus_writeb },
 227     PORTIO_END_OF_LIST (),
 228 };
 229
 230 static const MemoryRegionPortio gus_portio_list2[] = {
 231     {0, 2, 1, .read = gus_readb },
 232     PORTIO_END_OF_LIST (),
 233 };
 234
 235 static void gus_realizefn (DeviceState *dev, Error **errp)
 236 {
 237     ISADevice *d = ISA_DEVICE(dev);
 238     GUSState *s = GUS (dev);
 239     IsaDmaClass *k;
 240     struct audsettings as;
 241
 242     AUD_register_card ("gus", &s->card);
 243
 244     as.freq = s->freq;
 245     as.nchannels = 2;
 246     as.fmt = AUD_FMT_S16;
 247     as.endianness = GUS_ENDIANNESS;
 248
 249     s->voice = AUD_open_out (
 250         &s->card,
 251         NULL,
 252         "gus",
 253         s,
 254         GUS_callback,
 255         &as
 256         );
 257
 258     if (!s->voice) {
 259         AUD_remove_card (&s->card);
 260         error_setg(errp, "No voice");
 261         return;
 262     }
 263
 264     s->shift = 2;
 265     s->samples = AUD_get_buffer_size_out (s->voice) >> s->shift;
 266     s->mixbuf = g_malloc0 (s->samples << s->shift);
 267
 268     isa_register_portio_list (d, s->port, gus_portio_list1, s, "gus");
 269     isa_register_portio_list (d, (s->port + 0x100) & 0xf00,
 270                               gus_portio_list2, s, "gus");
 271
 272     s->isa_dma = isa_get_dma(isa_bus_from_device(d), s->emu.gusdma);
 273     k = ISADMA_GET_CLASS(s->isa_dma);
 274     k->register_channel(s->isa_dma, s->emu.gusdma, GUS_read_DMA, s);
 275     s->emu.himemaddr = s->himem;
 276     s->emu.gusdatapos = s->emu.himemaddr + 1024 * 1024 + 32;
 277     s->emu.opaque = s;
 278     isa_init_irq (d, &s->pic, s->emu.gusirq);
 279
 280     AUD_set_active_out (s->voice, 1);
 281 }
 282
 283 static int GUS_init (ISABus *bus)
 284 {
 285     isa_create_simple (bus, TYPE_GUS);
 286     return 0;
 287 }
 288
 289 static Property gus_properties[] = {
 290     DEFINE_PROP_UINT32 ("freq",    GUSState, freq,        44100),
 291     DEFINE_PROP_UINT32 ("iobase",  GUSState, port,        0x240),
 292     DEFINE_PROP_UINT32 ("irq",     GUSState, emu.gusirq,  7),
 293     DEFINE_PROP_UINT32 ("dma",     GUSState, emu.gusdma,  3),
 294     DEFINE_PROP_END_OF_LIST (),
 295 };
 296
 297 static void gus_class_initfn (ObjectClass *klass, void *data)
 298 {
 299     DeviceClass *dc = DEVICE_CLASS (klass);
 300
 301     dc->realize = gus_realizefn;
 302     set_bit(DEVICE_CATEGORY_SOUND, dc->categories);
 303     dc->desc = "Gravis Ultrasound GF1";
 304     dc->vmsd = &vmstate_gus;
 305     dc->props = gus_properties;
 306 }
 307
 308 static const TypeInfo gus_info = {
 309     .name          = TYPE_GUS,
 310     .parent        = TYPE_ISA_DEVICE,
 311     .instance_size = sizeof (GUSState),
 312     .class_init    = gus_class_initfn,
 313 };
 314
 315 static void gus_register_types (void)
 316 {
 317     type_register_static (&gus_info);
 318     isa_register_soundhw("gus", "Gravis Ultrasound GF1", GUS_init);
 319 }
 320
 321 type_init (gus_register_types)