319 lines
8.1 KiB
C
319 lines
8.1 KiB
C
/*
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* QEMU Proxy for Gravis Ultrasound GF1 emulation by Tibor "TS" Schütz
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*
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* Copyright (c) 2002-2005 Vassili Karpov (malc)
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include "hw/hw.h"
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#include "hw/audio/audio.h"
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#include "audio/audio.h"
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#include "hw/isa/isa.h"
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#include "gusemu.h"
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#include "gustate.h"
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#define dolog(...) AUD_log ("audio", __VA_ARGS__)
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#ifdef DEBUG
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#define ldebug(...) dolog (__VA_ARGS__)
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#else
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#define ldebug(...)
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#endif
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#ifdef HOST_WORDS_BIGENDIAN
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#define GUS_ENDIANNESS 1
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#else
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#define GUS_ENDIANNESS 0
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#endif
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#define IO_READ_PROTO(name) \
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static uint32_t name (void *opaque, uint32_t nport)
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#define IO_WRITE_PROTO(name) \
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static void name (void *opaque, uint32_t nport, uint32_t val)
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#define TYPE_GUS "gus"
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#define GUS(obj) OBJECT_CHECK (GUSState, (obj), TYPE_GUS)
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typedef struct GUSState {
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ISADevice dev;
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GUSEmuState emu;
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QEMUSoundCard card;
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uint32_t freq;
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uint32_t port;
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int pos, left, shift, irqs;
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GUSsample *mixbuf;
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uint8_t himem[1024 * 1024 + 32 + 4096];
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int samples;
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SWVoiceOut *voice;
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int64_t last_ticks;
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qemu_irq pic;
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} GUSState;
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IO_READ_PROTO (gus_readb)
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{
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GUSState *s = opaque;
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return gus_read (&s->emu, nport, 1);
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}
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IO_WRITE_PROTO (gus_writeb)
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{
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GUSState *s = opaque;
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gus_write (&s->emu, nport, 1, val);
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}
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static int write_audio (GUSState *s, int samples)
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{
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int net = 0;
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int pos = s->pos;
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while (samples) {
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int nbytes, wbytes, wsampl;
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nbytes = samples << s->shift;
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wbytes = AUD_write (
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s->voice,
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s->mixbuf + (pos << (s->shift - 1)),
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nbytes
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);
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if (wbytes) {
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wsampl = wbytes >> s->shift;
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samples -= wsampl;
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pos = (pos + wsampl) % s->samples;
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net += wsampl;
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}
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else {
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break;
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}
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}
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return net;
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}
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static void GUS_callback (void *opaque, int free)
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{
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int samples, to_play, net = 0;
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GUSState *s = opaque;
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samples = free >> s->shift;
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to_play = audio_MIN (samples, s->left);
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while (to_play) {
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int written = write_audio (s, to_play);
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if (!written) {
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goto reset;
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}
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s->left -= written;
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to_play -= written;
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samples -= written;
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net += written;
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}
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samples = audio_MIN (samples, s->samples);
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if (samples) {
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gus_mixvoices (&s->emu, s->freq, samples, s->mixbuf);
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while (samples) {
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int written = write_audio (s, samples);
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if (!written) {
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break;
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}
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samples -= written;
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net += written;
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}
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}
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s->left = samples;
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reset:
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gus_irqgen (&s->emu, muldiv64 (net, 1000000, s->freq));
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}
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int GUS_irqrequest (GUSEmuState *emu, int hwirq, int n)
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{
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GUSState *s = emu->opaque;
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/* qemu_irq_lower (s->pic); */
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qemu_irq_raise (s->pic);
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s->irqs += n;
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ldebug ("irqrequest %d %d %d\n", hwirq, n, s->irqs);
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return n;
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}
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void GUS_irqclear (GUSEmuState *emu, int hwirq)
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{
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GUSState *s = emu->opaque;
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ldebug ("irqclear %d %d\n", hwirq, s->irqs);
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qemu_irq_lower (s->pic);
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s->irqs -= 1;
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#ifdef IRQ_STORM
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if (s->irqs > 0) {
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qemu_irq_raise (s->pic[hwirq]);
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}
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#endif
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}
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void GUS_dmarequest (GUSEmuState *der)
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{
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/* GUSState *s = (GUSState *) der; */
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ldebug ("dma request %d\n", der->gusdma);
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DMA_hold_DREQ (der->gusdma);
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}
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static int GUS_read_DMA (void *opaque, int nchan, int dma_pos, int dma_len)
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{
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GUSState *s = opaque;
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char tmpbuf[4096];
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int pos = dma_pos, mode, left = dma_len - dma_pos;
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ldebug ("read DMA %#x %d\n", dma_pos, dma_len);
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mode = DMA_get_channel_mode (s->emu.gusdma);
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while (left) {
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int to_copy = audio_MIN ((size_t) left, sizeof (tmpbuf));
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int copied;
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ldebug ("left=%d to_copy=%d pos=%d\n", left, to_copy, pos);
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copied = DMA_read_memory (nchan, tmpbuf, pos, to_copy);
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gus_dma_transferdata (&s->emu, tmpbuf, copied, left == copied);
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left -= copied;
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pos += copied;
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}
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if (((mode >> 4) & 1) == 0) {
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DMA_release_DREQ (s->emu.gusdma);
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}
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return dma_len;
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}
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static const VMStateDescription vmstate_gus = {
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.name = "gus",
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.version_id = 2,
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.minimum_version_id = 2,
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.fields = (VMStateField[]) {
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VMSTATE_INT32 (pos, GUSState),
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VMSTATE_INT32 (left, GUSState),
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VMSTATE_INT32 (shift, GUSState),
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VMSTATE_INT32 (irqs, GUSState),
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VMSTATE_INT32 (samples, GUSState),
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VMSTATE_INT64 (last_ticks, GUSState),
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VMSTATE_BUFFER (himem, GUSState),
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VMSTATE_END_OF_LIST ()
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}
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};
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static const MemoryRegionPortio gus_portio_list1[] = {
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{0x000, 1, 1, .write = gus_writeb },
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{0x006, 10, 1, .read = gus_readb, .write = gus_writeb },
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{0x100, 8, 1, .read = gus_readb, .write = gus_writeb },
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PORTIO_END_OF_LIST (),
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};
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static const MemoryRegionPortio gus_portio_list2[] = {
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{0, 2, 1, .read = gus_readb },
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PORTIO_END_OF_LIST (),
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};
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static void gus_realizefn (DeviceState *dev, Error **errp)
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{
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ISADevice *d = ISA_DEVICE(dev);
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GUSState *s = GUS (dev);
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struct audsettings as;
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AUD_register_card ("gus", &s->card);
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as.freq = s->freq;
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as.nchannels = 2;
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as.fmt = AUD_FMT_S16;
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as.endianness = GUS_ENDIANNESS;
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s->voice = AUD_open_out (
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&s->card,
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NULL,
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"gus",
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s,
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GUS_callback,
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&as
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);
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if (!s->voice) {
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AUD_remove_card (&s->card);
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error_setg(errp, "No voice");
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return;
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}
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s->shift = 2;
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s->samples = AUD_get_buffer_size_out (s->voice) >> s->shift;
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s->mixbuf = g_malloc0 (s->samples << s->shift);
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isa_register_portio_list (d, s->port, gus_portio_list1, s, "gus");
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isa_register_portio_list (d, (s->port + 0x100) & 0xf00,
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gus_portio_list2, s, "gus");
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DMA_register_channel (s->emu.gusdma, GUS_read_DMA, s);
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s->emu.himemaddr = s->himem;
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s->emu.gusdatapos = s->emu.himemaddr + 1024 * 1024 + 32;
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s->emu.opaque = s;
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isa_init_irq (d, &s->pic, s->emu.gusirq);
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AUD_set_active_out (s->voice, 1);
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}
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static int GUS_init (ISABus *bus)
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{
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isa_create_simple (bus, TYPE_GUS);
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return 0;
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}
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static Property gus_properties[] = {
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DEFINE_PROP_UINT32 ("freq", GUSState, freq, 44100),
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DEFINE_PROP_UINT32 ("iobase", GUSState, port, 0x240),
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DEFINE_PROP_UINT32 ("irq", GUSState, emu.gusirq, 7),
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DEFINE_PROP_UINT32 ("dma", GUSState, emu.gusdma, 3),
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DEFINE_PROP_END_OF_LIST (),
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};
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static void gus_class_initfn (ObjectClass *klass, void *data)
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{
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DeviceClass *dc = DEVICE_CLASS (klass);
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dc->realize = gus_realizefn;
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set_bit(DEVICE_CATEGORY_SOUND, dc->categories);
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dc->desc = "Gravis Ultrasound GF1";
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dc->vmsd = &vmstate_gus;
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dc->props = gus_properties;
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}
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static const TypeInfo gus_info = {
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.name = TYPE_GUS,
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.parent = TYPE_ISA_DEVICE,
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.instance_size = sizeof (GUSState),
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.class_init = gus_class_initfn,
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};
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static void gus_register_types (void)
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{
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type_register_static (&gus_info);
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isa_register_soundhw("gus", "Gravis Ultrasound GF1", GUS_init);
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}
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type_init (gus_register_types)
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