| /* |
| * 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 WORDS_BIGENDIAN |
| #define GUS_ENDIANNESS 1 |
| #else |
| #define GUS_ENDIANNESS 0 |
| #endif |
| |
| #define IO_READ_PROTO(name) \ |
| uint32_t name (void *opaque, uint32_t nport) |
| #define IO_WRITE_PROTO(name) \ |
| void name (void *opaque, uint32_t nport, uint32_t val) |
| |
| static struct { |
| int port; |
| int irq; |
| int dma; |
| int freq; |
| } conf = {0x240, 7, 3, 44100}; |
| |
| typedef struct GUSState { |
| GUSEmuState emu; |
| QEMUSoundCard card; |
| int freq; |
| int pos, left, shift, irqs; |
| uint16_t *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, (double) (net * 1000000) / s->freq); |
| } |
| |
| int GUS_irqrequest (GUSEmuState *emu, int hwirq, int n) |
| { |
| GUSState *s = emu->opaque; |
| /* qemu_irq_lower (s->pic[hwirq]); */ |
| qemu_irq_raise (s->pic[hwirq]); |
| 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[hwirq]); |
| 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); |
| } |
| |
| int GUS_read_DMA (void *opaque, int nchan, int dma_pos, int dma_len) |
| { |
| GUSState *s = opaque; |
| int8_t 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; |
| } |
| |
| int GUS_init (AudioState *audio, qemu_irq *pic) |
| { |
| GUSState *s; |
| audsettings_t as; |
| |
| if (!audio) { |
| dolog ("No audio state\n"); |
| return -1; |
| } |
| |
| s = qemu_mallocz (sizeof (*s)); |
| if (!s) { |
| dolog ("Could not allocate memory for GUS (%zu bytes)\n", |
| sizeof (*s)); |
| return -1; |
| } |
| |
| AUD_register_card (audio, "gus", &s->card); |
| |
| as.freq = conf.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); |
| qemu_free (s); |
| return -1; |
| } |
| |
| s->shift = 2; |
| s->samples = AUD_get_buffer_size_out (s->voice) >> s->shift; |
| s->mixbuf = qemu_mallocz (s->samples << s->shift); |
| if (!s->mixbuf) { |
| AUD_close_out (&s->card, s->voice); |
| AUD_remove_card (&s->card); |
| qemu_free (s); |
| return -1; |
| } |
| |
| register_ioport_write (conf.port, 1, 1, gus_writeb, s); |
| register_ioport_write (conf.port, 1, 2, gus_writew, s); |
| |
| register_ioport_read ((conf.port + 0x100) & 0xf00, 1, 1, gus_readb, s); |
| register_ioport_read ((conf.port + 0x100) & 0xf00, 1, 2, gus_readw, s); |
| |
| register_ioport_write (conf.port + 6, 10, 1, gus_writeb, s); |
| register_ioport_write (conf.port + 6, 10, 2, gus_writew, s); |
| register_ioport_read (conf.port + 6, 10, 1, gus_readb, s); |
| register_ioport_read (conf.port + 6, 10, 2, gus_readw, s); |
| |
| |
| register_ioport_write (conf.port + 0x100, 8, 1, gus_writeb, s); |
| register_ioport_write (conf.port + 0x100, 8, 2, gus_writew, s); |
| register_ioport_read (conf.port + 0x100, 8, 1, gus_readb, s); |
| register_ioport_read (conf.port + 0x100, 8, 2, gus_readw, s); |
| |
| DMA_register_channel (conf.dma, GUS_read_DMA, s); |
| s->emu.gusirq = conf.irq; |
| s->emu.gusdma = conf.dma; |
| s->emu.himemaddr = s->himem; |
| s->emu.gusdatapos = s->emu.himemaddr + 1024 * 1024 + 32; |
| s->emu.opaque = s; |
| s->freq = conf.freq; |
| s->pic = pic; |
| |
| AUD_set_active_out (s->voice, 1); |
| return 0; |
| } |