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_WRITE_PROTO (gus_writeb)
  75 {
  76     GUSState *s = opaque;
  77
  78     gus_write (&s->emu, nport, 1, val);
  79 }
  80
  81 static int write_audio (GUSState *s, int samples)
  82 {
  83     int net = 0;
  84     int pos = s->pos;
  85
  86     while (samples) {
  87         int nbytes, wbytes, wsampl;
  88
  89         nbytes = samples << s->shift;
  90         wbytes = AUD_write (
  91             s->voice,
  92             s->mixbuf + (pos << (s->shift - 1)),
  93             nbytes
  94             );
  95
  96         if (wbytes) {
  97             wsampl = wbytes >> s->shift;
  98
  99             samples -= wsampl;
 100             pos = (pos + wsampl) % s->samples;
 101
 102             net += wsampl;
 103         }
 104         else {
 105             break;
 106         }
 107     }
 108
 109     return net;
 110 }
 111
 112 static void GUS_callback (void *opaque, int free)
 113 {
 114     int samples, to_play, net = 0;
 115     GUSState *s = opaque;
 116
 117     samples = free >> s->shift;
 118     to_play = audio_MIN (samples, s->left);
 119
 120     while (to_play) {
 121         int written = write_audio (s, to_play);
 122
 123         if (!written) {
 124             goto reset;
 125         }
 126
 127         s->left -= written;
 128         to_play -= written;
 129         samples -= written;
 130         net += written;
 131     }
 132
 133     samples = audio_MIN (samples, s->samples);
 134     if (samples) {
 135         gus_mixvoices (&s->emu, s->freq, samples, s->mixbuf);
 136
 137         while (samples) {
 138             int written = write_audio (s, samples);
 139             if (!written) {
 140                 break;
 141             }
 142             samples -= written;
 143             net += written;
 144         }
 145     }
 146     s->left = samples;
 147
 148  reset:
 149     gus_irqgen (&s->emu, muldiv64 (net, 1000000, s->freq));
 150 }
 151
 152 int GUS_irqrequest (GUSEmuState *emu, int hwirq, int n)
 153 {
 154     GUSState *s = emu->opaque;
 155     /* qemu_irq_lower (s->pic); */
 156     qemu_irq_raise (s->pic);
 157     s->irqs += n;
 158     ldebug ("irqrequest %d %d %d\n", hwirq, n, s->irqs);
 159     return n;
 160 }
 161
 162 void GUS_irqclear (GUSEmuState *emu, int hwirq)
 163 {
 164     GUSState *s = emu->opaque;
 165     ldebug ("irqclear %d %d\n", hwirq, s->irqs);
 166     qemu_irq_lower (s->pic);
 167     s->irqs -= 1;
 168 #ifdef IRQ_STORM
 169     if (s->irqs > 0) {
 170         qemu_irq_raise (s->pic[hwirq]);
 171     }
 172 #endif
 173 }
 174
 175 void GUS_dmarequest (GUSEmuState *der)
 176 {
 177     /* GUSState *s = (GUSState *) der; */
 178     ldebug ("dma request %d\n", der->gusdma);
 179     DMA_hold_DREQ (der->gusdma);
 180 }
 181
 182 static int GUS_read_DMA (void *opaque, int nchan, int dma_pos, int dma_len)
 183 {
 184     GUSState *s = opaque;
 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 = DMA_get_channel_mode (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 = DMA_read_memory (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         DMA_release_DREQ (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     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     DMA_register_channel (s->emu.gusdma, GUS_read_DMA, s);
 272     s->emu.himemaddr = s->himem;
 273     s->emu.gusdatapos = s->emu.himemaddr + 1024 * 1024 + 32;
 274     s->emu.opaque = s;
 275     isa_init_irq (d, &s->pic, s->emu.gusirq);
 276
 277     AUD_set_active_out (s->voice, 1);
 278 }
 279
 280 static int GUS_init (ISABus *bus)
 281 {
 282     isa_create_simple (bus, TYPE_GUS);
 283     return 0;
 284 }
 285
 286 static Property gus_properties[] = {
 287     DEFINE_PROP_UINT32 ("freq",    GUSState, freq,        44100),
 288     DEFINE_PROP_UINT32 ("iobase",  GUSState, port,        0x240),
 289     DEFINE_PROP_UINT32 ("irq",     GUSState, emu.gusirq,  7),
 290     DEFINE_PROP_UINT32 ("dma",     GUSState, emu.gusdma,  3),
 291     DEFINE_PROP_END_OF_LIST (),
 292 };
 293
 294 static void gus_class_initfn (ObjectClass *klass, void *data)
 295 {
 296     DeviceClass *dc = DEVICE_CLASS (klass);
 297
 298     dc->realize = gus_realizefn;
 299     set_bit(DEVICE_CATEGORY_SOUND, dc->categories);
 300     dc->desc = "Gravis Ultrasound GF1";
 301     dc->vmsd = &vmstate_gus;
 302     dc->props = gus_properties;
 303 }
 304
 305 static const TypeInfo gus_info = {
 306     .name          = TYPE_GUS,
 307     .parent        = TYPE_ISA_DEVICE,
 308     .instance_size = sizeof (GUSState),
 309     .class_init    = gus_class_initfn,
 310 };
 311
 312 static void gus_register_types (void)
 313 {
 314     type_register_static (&gus_info);
 315     isa_register_soundhw("gus", "Gravis Ultrasound GF1", GUS_init);
 316 }
 317
 318 type_init (gus_register_types)