2 * QEMU Proxy for Gravis Ultrasound GF1 emulation by Tibor "TS" Schütz
4 * Copyright (c) 2002-2005 Vassili Karpov (malc)
6 * Permission is hereby granted, free of charge, to any person obtaining a copy
7 * of this software and associated documentation files (the "Software"), to deal
8 * in the Software without restriction, including without limitation the rights
9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10 * copies of the Software, and to permit persons to whom the Software is
11 * furnished to do so, subject to the following conditions:
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
26 #include "audio/audio.h"
31 #define dolog(...) AUD_log ("audio", __VA_ARGS__)
33 #define ldebug(...) dolog (__VA_ARGS__)
38 #ifdef WORDS_BIGENDIAN
39 #define GUS_ENDIANNESS 1
41 #define GUS_ENDIANNESS 0
44 #define IO_READ_PROTO(name) \
45 uint32_t name (void *opaque, uint32_t nport)
46 #define IO_WRITE_PROTO(name) \
47 void name (void *opaque, uint32_t nport, uint32_t val)
54 } conf = {0x240, 7, 3, 44100};
56 typedef struct GUSState {
60 int pos, left, shift, irqs;
62 uint8_t himem[1024 * 1024 + 32 + 4096];
69 IO_READ_PROTO (gus_readb)
73 return gus_read (&s->emu, nport, 1);
76 IO_READ_PROTO (gus_readw)
80 return gus_read (&s->emu, nport, 2);
83 IO_WRITE_PROTO (gus_writeb)
87 gus_write (&s->emu, nport, 1, val);
90 IO_WRITE_PROTO (gus_writew)
94 gus_write (&s->emu, nport, 2, val);
97 static int write_audio (GUSState *s, int samples)
103 int nbytes, wbytes, wsampl;
105 nbytes = samples << s->shift;
108 s->mixbuf + (pos << (s->shift - 1)),
113 wsampl = wbytes >> s->shift;
116 pos = (pos + wsampl) % s->samples;
128 static void GUS_callback (void *opaque, int free)
130 int samples, to_play, net = 0;
131 GUSState *s = opaque;
133 samples = free >> s->shift;
134 to_play = audio_MIN (samples, s->left);
137 int written = write_audio (s, to_play);
149 samples = audio_MIN (samples, s->samples);
151 gus_mixvoices (&s->emu, s->freq, samples, s->mixbuf);
154 int written = write_audio (s, samples);
165 gus_irqgen (&s->emu, (double) (net * 1000000) / s->freq);
168 int GUS_irqrequest (GUSEmuState *emu, int hwirq, int n)
170 GUSState *s = emu->opaque;
171 /* qemu_irq_lower (s->pic[hwirq]); */
172 qemu_irq_raise (s->pic[hwirq]);
174 ldebug ("irqrequest %d %d %d\n", hwirq, n, s->irqs);
178 void GUS_irqclear (GUSEmuState *emu, int hwirq)
180 GUSState *s = emu->opaque;
181 ldebug ("irqclear %d %d\n", hwirq, s->irqs);
182 qemu_irq_lower (s->pic[hwirq]);
186 qemu_irq_raise (s->pic[hwirq]);
191 void GUS_dmarequest (GUSEmuState *der)
193 /* GUSState *s = (GUSState *) der; */
194 ldebug ("dma request %d\n", der->gusdma);
195 DMA_hold_DREQ (der->gusdma);
198 int GUS_read_DMA (void *opaque, int nchan, int dma_pos, int dma_len)
200 GUSState *s = opaque;
202 int pos = dma_pos, mode, left = dma_len - dma_pos;
204 ldebug ("read DMA %#x %d\n", dma_pos, dma_len);
205 mode = DMA_get_channel_mode (s->emu.gusdma);
207 int to_copy = audio_MIN ((size_t) left, sizeof (tmpbuf));
210 ldebug ("left=%d to_copy=%d pos=%d\n", left, to_copy, pos);
211 copied = DMA_read_memory (nchan, tmpbuf, pos, to_copy);
212 gus_dma_transferdata (&s->emu, tmpbuf, copied, left == copied);
217 if (0 == ((mode >> 4) & 1)) {
218 DMA_release_DREQ (s->emu.gusdma);
223 int GUS_init (AudioState *audio, qemu_irq *pic)
229 dolog ("No audio state\n");
233 s = qemu_mallocz (sizeof (*s));
235 dolog ("Could not allocate memory for GUS (%zu bytes)\n",
240 AUD_register_card (audio, "gus", &s->card);
244 as.fmt = AUD_FMT_S16;
245 as.endianness = GUS_ENDIANNESS;
247 s->voice = AUD_open_out (
257 AUD_remove_card (&s->card);
263 s->samples = AUD_get_buffer_size_out (s->voice) >> s->shift;
264 s->mixbuf = qemu_mallocz (s->samples << s->shift);
266 AUD_close_out (&s->card, s->voice);
267 AUD_remove_card (&s->card);
272 register_ioport_write (conf.port, 1, 1, gus_writeb, s);
273 register_ioport_write (conf.port, 1, 2, gus_writew, s);
275 register_ioport_read ((conf.port + 0x100) & 0xf00, 1, 1, gus_readb, s);
276 register_ioport_read ((conf.port + 0x100) & 0xf00, 1, 2, gus_readw, s);
278 register_ioport_write (conf.port + 6, 10, 1, gus_writeb, s);
279 register_ioport_write (conf.port + 6, 10, 2, gus_writew, s);
280 register_ioport_read (conf.port + 6, 10, 1, gus_readb, s);
281 register_ioport_read (conf.port + 6, 10, 2, gus_readw, s);
284 register_ioport_write (conf.port + 0x100, 8, 1, gus_writeb, s);
285 register_ioport_write (conf.port + 0x100, 8, 2, gus_writew, s);
286 register_ioport_read (conf.port + 0x100, 8, 1, gus_readb, s);
287 register_ioport_read (conf.port + 0x100, 8, 2, gus_readw, s);
289 DMA_register_channel (conf.dma, GUS_read_DMA, s);
290 s->emu.gusirq = conf.irq;
291 s->emu.gusdma = conf.dma;
292 s->emu.himemaddr = s->himem;
293 s->emu.gusdatapos = s->emu.himemaddr + 1024 * 1024 + 32;
298 AUD_set_active_out (s->voice, 1);