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/*
* 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 "hw.h"
#include "audiodev.h"
#include "audio/audio.h"
#include "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)
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 int gus_initfn (ISADevice *dev)
{
GUSState *s = DO_UPCAST(GUSState, dev, 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);
return -1;
}
s->shift = 2;
s->samples = AUD_get_buffer_size_out (s->voice) >> s->shift;
s->mixbuf = qemu_mallocz (s->samples << s->shift);
register_ioport_write (s->port, 1, 1, gus_writeb, s);
register_ioport_write (s->port, 1, 2, gus_writew, s);
isa_init_ioport_range(dev, s->port, 2);
register_ioport_read ((s->port + 0x100) & 0xf00, 1, 1, gus_readb, s);
register_ioport_read ((s->port + 0x100) & 0xf00, 1, 2, gus_readw, s);
isa_init_ioport_range(dev, (s->port + 0x100) & 0xf00, 2);
register_ioport_write (s->port + 6, 10, 1, gus_writeb, s);
register_ioport_write (s->port + 6, 10, 2, gus_writew, s);
register_ioport_read (s->port + 6, 10, 1, gus_readb, s);
register_ioport_read (s->port + 6, 10, 2, gus_readw, s);
isa_init_ioport_range(dev, s->port + 6, 10);
register_ioport_write (s->port + 0x100, 8, 1, gus_writeb, s);
register_ioport_write (s->port + 0x100, 8, 2, gus_writew, s);
register_ioport_read (s->port + 0x100, 8, 1, gus_readb, s);
register_ioport_read (s->port + 0x100, 8, 2, gus_readw, s);
isa_init_ioport_range(dev, s->port + 0x100, 8);
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 (dev, &s->pic, s->emu.gusirq);
AUD_set_active_out (s->voice, 1);
return 0;
}
int GUS_init (qemu_irq *pic)
{
isa_create_simple ("gus");
return 0;
}
static ISADeviceInfo gus_info = {
.qdev.name = "gus",
.qdev.desc = "Gravis Ultrasound GF1",
.qdev.size = sizeof (GUSState),
.qdev.vmsd = &vmstate_gus,
.init = gus_initfn,
.qdev.props = (Property[]) {
DEFINE_PROP_UINT32 ("freq", GUSState, freq, 44100),
DEFINE_PROP_HEX32 ("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_register (void)
{
isa_qdev_register (&gus_info);
}
device_init (gus_register)
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