blob: e29a5715db325a87d1749183de43eae0f4056c91 [file] [log] [blame]
/*
* QEMU Proxy for Gravis Ultrasound GF1 emulation by Tibor "TS" Sch├╝tz
*
* 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 "hw/hw.h"
#include "hw/audio/audio.h"
#include "audio/audio.h"
#include "hw/isa/isa.h"
#include "gusemu.h"
#include "gustate.h"
#define dolog(...) AUD_log ("audio", __VA_ARGS__)
#ifdef DEBUG
#define ldebug(...) dolog (__VA_ARGS__)
#else
#define ldebug(...)
#endif
#ifdef HOST_WORDS_BIGENDIAN
#define GUS_ENDIANNESS 1
#else
#define GUS_ENDIANNESS 0
#endif
#define IO_READ_PROTO(name) \
static uint32_t name (void *opaque, uint32_t nport)
#define IO_WRITE_PROTO(name) \
static void name (void *opaque, uint32_t nport, uint32_t val)
#define TYPE_GUS "gus"
#define GUS(obj) OBJECT_CHECK (GUSState, (obj), TYPE_GUS)
typedef struct GUSState {
ISADevice dev;
GUSEmuState emu;
QEMUSoundCard card;
uint32_t freq;
uint32_t port;
int pos, left, shift, irqs;
GUSsample *mixbuf;
uint8_t himem[1024 * 1024 + 32 + 4096];
int samples;
SWVoiceOut *voice;
int64_t last_ticks;
qemu_irq pic;
} GUSState;
IO_READ_PROTO (gus_readb)
{
GUSState *s = opaque;
return gus_read (&s->emu, nport, 1);
}
IO_READ_PROTO (gus_readw)
{
GUSState *s = opaque;
return gus_read (&s->emu, nport, 2);
}
IO_WRITE_PROTO (gus_writeb)
{
GUSState *s = opaque;
gus_write (&s->emu, nport, 1, val);
}
IO_WRITE_PROTO (gus_writew)
{
GUSState *s = opaque;
gus_write (&s->emu, nport, 2, 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 = audio_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 = audio_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, muldiv64 (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 *der)
{
/* GUSState *s = (GUSState *) der; */
ldebug ("dma request %d\n", der->gusdma);
DMA_hold_DREQ (der->gusdma);
}
static int GUS_read_DMA (void *opaque, int nchan, int dma_pos, int dma_len)
{
GUSState *s = opaque;
char tmpbuf[4096];
int pos = dma_pos, mode, left = dma_len - dma_pos;
ldebug ("read DMA %#x %d\n", dma_pos, dma_len);
mode = DMA_get_channel_mode (s->emu.gusdma);
while (left) {
int to_copy = audio_MIN ((size_t) left, sizeof (tmpbuf));
int copied;
ldebug ("left=%d to_copy=%d pos=%d\n", left, to_copy, pos);
copied = DMA_read_memory (nchan, tmpbuf, pos, to_copy);
gus_dma_transferdata (&s->emu, tmpbuf, copied, left == copied);
left -= copied;
pos += copied;
}
if (0 == ((mode >> 4) & 1)) {
DMA_release_DREQ (s->emu.gusdma);
}
return dma_len;
}
static const VMStateDescription vmstate_gus = {
.name = "gus",
.version_id = 2,
.minimum_version_id = 2,
.minimum_version_id_old = 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 },
{0x000, 1, 2, .write = gus_writew },
{0x006, 10, 1, .read = gus_readb, .write = gus_writeb },
{0x006, 10, 2, .read = gus_readw, .write = gus_writew },
{0x100, 8, 1, .read = gus_readb, .write = gus_writeb },
{0x100, 8, 2, .read = gus_readw, .write = gus_writew },
PORTIO_END_OF_LIST (),
};
static const MemoryRegionPortio gus_portio_list2[] = {
{0, 1, 1, .read = gus_readb },
{0, 1, 2, .read = gus_readw },
PORTIO_END_OF_LIST (),
};
static void gus_realizefn (DeviceState *dev, Error **errp)
{
ISADevice *d = ISA_DEVICE(dev);
GUSState *s = GUS (dev);
struct audsettings as;
AUD_register_card ("gus", &s->card);
as.freq = s->freq;
as.nchannels = 2;
as.fmt = AUD_FMT_S16;
as.endianness = GUS_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->port, gus_portio_list1, s, "gus");
isa_register_portio_list (d, (s->port + 0x100) & 0xf00,
gus_portio_list2, s, "gus");
DMA_register_channel (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 int GUS_init (ISABus *bus)
{
isa_create_simple (bus, TYPE_GUS);
return 0;
}
static Property gus_properties[] = {
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;
dc->props = 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);
isa_register_soundhw("gus", "Gravis Ultrasound GF1", GUS_init);
}
type_init (gus_register_types)