diff options
Diffstat (limited to 'qemu/hw/audio/gus.c')
| -rw-r--r-- | qemu/hw/audio/gus.c | 318 |
1 files changed, 318 insertions, 0 deletions
diff --git a/qemu/hw/audio/gus.c b/qemu/hw/audio/gus.c new file mode 100644 index 000000000..86223a954 --- /dev/null +++ b/qemu/hw/audio/gus.c @@ -0,0 +1,318 @@ +/* + * 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/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_WRITE_PROTO (gus_writeb) +{ + 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 = 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 (((mode >> 4) & 1) == 0) { + DMA_release_DREQ (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); + 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) |