1 files changed, 323 insertions, 0 deletions
diff --git a/hw/audio/gus.c b/hw/audio/gus.c
new file mode 100644
index 000000000..e8719ee11
--- /dev/null
+++ b/hw/audio/gus.c
@@ -0,0 +1,323 @@
+/*
+ * QEMU Proxy for Gravis Ultrasound GF1 emulation by Tibor "TS" Schütz
+ *
+ * Copyright (c) 2002-2005 Vassili Karpov (malc)
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include "qemu/osdep.h"
+#include "qapi/error.h"
+#include "qemu/module.h"
+#include "hw/audio/soundhw.h"
+#include "audio/audio.h"
+#include "hw/irq.h"
+#include "hw/isa/isa.h"
+#include "hw/qdev-properties.h"
+#include "migration/vmstate.h"
+#include "gusemu.h"
+#include "gustate.h"
+#include "qom/object.h"
+
+#define dolog(...) AUD_log ("audio", __VA_ARGS__)
+#ifdef DEBUG
+#define ldebug(...) dolog (__VA_ARGS__)
+#else
+#define ldebug(...)
+#endif
+
+#define TYPE_GUS "gus"
+OBJECT_DECLARE_SIMPLE_TYPE(GUSState, GUS)
+
+struct GUSState {
+    ISADevice dev;
+    GUSEmuState emu;
+    QEMUSoundCard card;
+    uint32_t freq;
+    uint32_t port;
+    int pos, left, shift, irqs;
+    int16_t *mixbuf;
+    uint8_t himem[1024 * 1024 + 32 + 4096];
+    int samples;
+    SWVoiceOut *voice;
+    int64_t last_ticks;
+    qemu_irq pic;
+    IsaDma *isa_dma;
+    PortioList portio_list1;
+    PortioList portio_list2;
+};
+
+static uint32_t gus_readb(void *opaque, uint32_t nport)
+{
+    GUSState *s = opaque;
+
+    return gus_read (&s->emu, nport, 1);
+}
+
+static void gus_writeb(void *opaque, uint32_t nport, uint32_t val)
+{
+    GUSState *s = opaque;
+
+    gus_write (&s->emu, nport, 1, val);
+}
+
+static int write_audio (GUSState *s, int samples)
+{
+    int net = 0;
+    int pos = s->pos;
+
+    while (samples) {
+        int nbytes, wbytes, wsampl;
+
+        nbytes = samples << s->shift;
+        wbytes = AUD_write (
+            s->voice,
+            s->mixbuf + (pos << (s->shift - 1)),
+            nbytes
+            );
+
+        if (wbytes) {
+            wsampl = wbytes >> s->shift;
+
+            samples -= wsampl;
+            pos = (pos + wsampl) % s->samples;
+
+            net += wsampl;
+        }
+        else {
+            break;
+        }
+    }
+
+    return net;
+}
+
+static void GUS_callback (void *opaque, int free)
+{
+    int samples, to_play, net = 0;
+    GUSState *s = opaque;
+
+    samples = free >> s->shift;
+    to_play = MIN (samples, s->left);
+
+    while (to_play) {
+        int written = write_audio (s, to_play);
+
+        if (!written) {
+            goto reset;
+        }
+
+        s->left -= written;
+        to_play -= written;
+        samples -= written;
+        net += written;
+    }
+
+    samples = MIN (samples, s->samples);
+    if (samples) {
+        gus_mixvoices (&s->emu, s->freq, samples, s->mixbuf);
+
+        while (samples) {
+            int written = write_audio (s, samples);
+            if (!written) {
+                break;
+            }
+            samples -= written;
+            net += written;
+        }
+    }
+    s->left = samples;
+
+ reset:
+    gus_irqgen (&s->emu, (uint64_t)net * 1000000 / s->freq);
+}
+
+int GUS_irqrequest (GUSEmuState *emu, int hwirq, int n)
+{
+    GUSState *s = emu->opaque;
+    /* qemu_irq_lower (s->pic); */
+    qemu_irq_raise (s->pic);
+    s->irqs += n;
+    ldebug ("irqrequest %d %d %d\n", hwirq, n, s->irqs);
+    return n;
+}
+
+void GUS_irqclear (GUSEmuState *emu, int hwirq)
+{
+    GUSState *s = emu->opaque;
+    ldebug ("irqclear %d %d\n", hwirq, s->irqs);
+    qemu_irq_lower (s->pic);
+    s->irqs -= 1;
+#ifdef IRQ_STORM
+    if (s->irqs > 0) {
+        qemu_irq_raise (s->pic[hwirq]);
+    }
+#endif
+}
+
+void GUS_dmarequest (GUSEmuState *emu)
+{
+    GUSState *s = emu->opaque;
+    IsaDmaClass *k = ISADMA_GET_CLASS(s->isa_dma);
+    ldebug ("dma request %d\n", der->gusdma);
+    k->hold_DREQ(s->isa_dma, s->emu.gusdma);
+}
+
+static int GUS_read_DMA (void *opaque, int nchan, int dma_pos, int dma_len)
+{
+    GUSState *s = opaque;
+    IsaDmaClass *k = ISADMA_GET_CLASS(s->isa_dma);
+    char tmpbuf[4096];
+    int pos = dma_pos, mode, left = dma_len - dma_pos;
+
+    ldebug ("read DMA %#x %d\n", dma_pos, dma_len);
+    mode = k->has_autoinitialization(s->isa_dma, s->emu.gusdma);
+    while (left) {
+        int to_copy = MIN ((size_t) left, sizeof (tmpbuf));
+        int copied;
+
+        ldebug ("left=%d to_copy=%d pos=%d\n", left, to_copy, pos);
+        copied = k->read_memory(s->isa_dma, nchan, tmpbuf, pos, to_copy);
+        gus_dma_transferdata (&s->emu, tmpbuf, copied, left == copied);
+        left -= copied;
+        pos += copied;
+    }
+
+    if (((mode >> 4) & 1) == 0) {
+        k->release_DREQ(s->isa_dma, s->emu.gusdma);
+    }
+    return dma_len;
+}
+
+static const VMStateDescription vmstate_gus = {
+    .name = "gus",
+    .version_id = 2,
+    .minimum_version_id = 2,
+    .fields = (VMStateField[]) {
+        VMSTATE_INT32 (pos, GUSState),
+        VMSTATE_INT32 (left, GUSState),
+        VMSTATE_INT32 (shift, GUSState),
+        VMSTATE_INT32 (irqs, GUSState),
+        VMSTATE_INT32 (samples, GUSState),
+        VMSTATE_INT64 (last_ticks, GUSState),
+        VMSTATE_BUFFER (himem, GUSState),
+        VMSTATE_END_OF_LIST ()
+    }
+};
+
+static const MemoryRegionPortio gus_portio_list1[] = {
+    {0x000,  1, 1, .write = gus_writeb },
+    {0x006, 10, 1, .read = gus_readb, .write = gus_writeb },
+    {0x100,  8, 1, .read = gus_readb, .write = gus_writeb },
+    PORTIO_END_OF_LIST (),
+};
+
+static const MemoryRegionPortio gus_portio_list2[] = {
+    {0, 2, 1, .read = gus_readb },
+    PORTIO_END_OF_LIST (),
+};
+
+static void gus_realizefn (DeviceState *dev, Error **errp)
+{
+    ISADevice *d = ISA_DEVICE(dev);
+    GUSState *s = GUS (dev);
+    IsaDmaClass *k;
+    struct audsettings as;
+
+    s->isa_dma = isa_get_dma(isa_bus_from_device(d), s->emu.gusdma);
+    if (!s->isa_dma) {
+        error_setg(errp, "ISA controller does not support DMA");
+        return;
+    }
+
+    AUD_register_card ("gus", &s->card);
+
+    as.freq = s->freq;
+    as.nchannels = 2;
+    as.fmt = AUDIO_FORMAT_S16;
+    as.endianness = AUDIO_HOST_ENDIANNESS;
+
+    s->voice = AUD_open_out (
+        &s->card,
+        NULL,
+        "gus",
+        s,
+        GUS_callback,
+        &as
+        );
+
+    if (!s->voice) {
+        AUD_remove_card (&s->card);
+        error_setg(errp, "No voice");
+        return;
+    }
+
+    s->shift = 2;
+    s->samples = AUD_get_buffer_size_out (s->voice) >> s->shift;
+    s->mixbuf = g_malloc0 (s->samples << s->shift);
+
+    isa_register_portio_list(d, &s->portio_list1, s->port,
+                             gus_portio_list1, s, "gus");
+    isa_register_portio_list(d, &s->portio_list2, (s->port + 0x100) & 0xf00,
+                             gus_portio_list2, s, "gus");
+
+    k = ISADMA_GET_CLASS(s->isa_dma);
+    k->register_channel(s->isa_dma, s->emu.gusdma, GUS_read_DMA, s);
+    s->emu.himemaddr = s->himem;
+    s->emu.gusdatapos = s->emu.himemaddr + 1024 * 1024 + 32;
+    s->emu.opaque = s;
+    isa_init_irq (d, &s->pic, s->emu.gusirq);
+
+    AUD_set_active_out (s->voice, 1);
+}
+
+static Property gus_properties[] = {
+    DEFINE_AUDIO_PROPERTIES(GUSState, card),
+    DEFINE_PROP_UINT32 ("freq",    GUSState, freq,        44100),
+    DEFINE_PROP_UINT32 ("iobase",  GUSState, port,        0x240),
+    DEFINE_PROP_UINT32 ("irq",     GUSState, emu.gusirq,  7),
+    DEFINE_PROP_UINT32 ("dma",     GUSState, emu.gusdma,  3),
+    DEFINE_PROP_END_OF_LIST (),
+};
+
+static void gus_class_initfn (ObjectClass *klass, void *data)
+{
+    DeviceClass *dc = DEVICE_CLASS (klass);
+
+    dc->realize = gus_realizefn;
+    set_bit(DEVICE_CATEGORY_SOUND, dc->categories);
+    dc->desc = "Gravis Ultrasound GF1";
+    dc->vmsd = &vmstate_gus;
+    device_class_set_props(dc, gus_properties);
+}
+
+static const TypeInfo gus_info = {
+    .name          = TYPE_GUS,
+    .parent        = TYPE_ISA_DEVICE,
+    .instance_size = sizeof (GUSState),
+    .class_init    = gus_class_initfn,
+};
+
+static void gus_register_types (void)
+{
+    type_register_static (&gus_info);
+    deprecated_register_soundhw("gus", "Gravis Ultrasound GF1", 1, TYPE_GUS);
+}
+
+type_init (gus_register_types)