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 HOST_WORDS_BIGENDIAN
39 #define GUS_ENDIANNESS 1
41 #define GUS_ENDIANNESS 0
44 #define IO_READ_PROTO(name) \
45 static uint32_t name (void *opaque, uint32_t nport)
46 #define IO_WRITE_PROTO(name) \
47 static void name (void *opaque, uint32_t nport, uint32_t val)
49 typedef struct GUSState {
55 int pos, left, shift, irqs;
57 uint8_t himem[1024 * 1024 + 32 + 4096];
64 IO_READ_PROTO (gus_readb)
68 return gus_read (&s->emu, nport, 1);
71 IO_READ_PROTO (gus_readw)
75 return gus_read (&s->emu, nport, 2);
78 IO_WRITE_PROTO (gus_writeb)
82 gus_write (&s->emu, nport, 1, val);
85 IO_WRITE_PROTO (gus_writew)
89 gus_write (&s->emu, nport, 2, val);
92 static int write_audio (GUSState *s, int samples)
98 int nbytes, wbytes, wsampl;
100 nbytes = samples << s->shift;
103 s->mixbuf + (pos << (s->shift - 1)),
108 wsampl = wbytes >> s->shift;
111 pos = (pos + wsampl) % s->samples;
123 static void GUS_callback (void *opaque, int free)
125 int samples, to_play, net = 0;
126 GUSState *s = opaque;
128 samples = free >> s->shift;
129 to_play = audio_MIN (samples, s->left);
132 int written = write_audio (s, to_play);
144 samples = audio_MIN (samples, s->samples);
146 gus_mixvoices (&s->emu, s->freq, samples, s->mixbuf);
149 int written = write_audio (s, samples);
160 gus_irqgen (&s->emu, (double) (net * 1000000) / s->freq);
163 int GUS_irqrequest (GUSEmuState *emu, int hwirq, int n)
165 GUSState *s = emu->opaque;
166 /* qemu_irq_lower (s->pic); */
167 qemu_irq_raise (s->pic);
169 ldebug ("irqrequest %d %d %d\n", hwirq, n, s->irqs);
173 void GUS_irqclear (GUSEmuState *emu, int hwirq)
175 GUSState *s = emu->opaque;
176 ldebug ("irqclear %d %d\n", hwirq, s->irqs);
177 qemu_irq_lower (s->pic);
181 qemu_irq_raise (s->pic[hwirq]);
186 void GUS_dmarequest (GUSEmuState *der)
188 /* GUSState *s = (GUSState *) der; */
189 ldebug ("dma request %d\n", der->gusdma);
190 DMA_hold_DREQ (der->gusdma);
193 static int GUS_read_DMA (void *opaque, int nchan, int dma_pos, int dma_len)
195 GUSState *s = opaque;
197 int pos = dma_pos, mode, left = dma_len - dma_pos;
199 ldebug ("read DMA %#x %d\n", dma_pos, dma_len);
200 mode = DMA_get_channel_mode (s->emu.gusdma);
202 int to_copy = audio_MIN ((size_t) left, sizeof (tmpbuf));
205 ldebug ("left=%d to_copy=%d pos=%d\n", left, to_copy, pos);
206 copied = DMA_read_memory (nchan, tmpbuf, pos, to_copy);
207 gus_dma_transferdata (&s->emu, tmpbuf, copied, left == copied);
212 if (0 == ((mode >> 4) & 1)) {
213 DMA_release_DREQ (s->emu.gusdma);
218 static void GUS_save (QEMUFile *f, void *opaque)
220 GUSState *s = opaque;
222 qemu_put_be32 (f, s->pos);
223 qemu_put_be32 (f, s->left);
224 qemu_put_be32 (f, s->shift);
225 qemu_put_be32 (f, s->irqs);
226 qemu_put_be32 (f, s->samples);
227 qemu_put_be64 (f, s->last_ticks);
228 qemu_put_buffer (f, s->himem, sizeof (s->himem));
231 static int GUS_load (QEMUFile *f, void *opaque, int version_id)
233 GUSState *s = opaque;
238 s->pos = qemu_get_be32 (f);
239 s->left = qemu_get_be32 (f);
240 s->shift = qemu_get_be32 (f);
241 s->irqs = qemu_get_be32 (f);
242 s->samples = qemu_get_be32 (f);
243 s->last_ticks = qemu_get_be64 (f);
244 qemu_get_buffer (f, s->himem, sizeof (s->himem));
248 static int gus_initfn (ISADevice *dev)
250 GUSState *s = DO_UPCAST(GUSState, dev, dev);
251 struct audsettings as;
253 AUD_register_card ("gus", &s->card);
257 as.fmt = AUD_FMT_S16;
258 as.endianness = GUS_ENDIANNESS;
260 s->voice = AUD_open_out (
270 AUD_remove_card (&s->card);
275 s->samples = AUD_get_buffer_size_out (s->voice) >> s->shift;
276 s->mixbuf = qemu_mallocz (s->samples << s->shift);
278 register_ioport_write (s->port, 1, 1, gus_writeb, s);
279 register_ioport_write (s->port, 1, 2, gus_writew, s);
281 register_ioport_read ((s->port + 0x100) & 0xf00, 1, 1, gus_readb, s);
282 register_ioport_read ((s->port + 0x100) & 0xf00, 1, 2, gus_readw, s);
284 register_ioport_write (s->port + 6, 10, 1, gus_writeb, s);
285 register_ioport_write (s->port + 6, 10, 2, gus_writew, s);
286 register_ioport_read (s->port + 6, 10, 1, gus_readb, s);
287 register_ioport_read (s->port + 6, 10, 2, gus_readw, s);
290 register_ioport_write (s->port + 0x100, 8, 1, gus_writeb, s);
291 register_ioport_write (s->port + 0x100, 8, 2, gus_writew, s);
292 register_ioport_read (s->port + 0x100, 8, 1, gus_readb, s);
293 register_ioport_read (s->port + 0x100, 8, 2, gus_readw, s);
295 DMA_register_channel (s->emu.gusdma, GUS_read_DMA, s);
296 s->emu.himemaddr = s->himem;
297 s->emu.gusdatapos = s->emu.himemaddr + 1024 * 1024 + 32;
299 isa_init_irq (dev, &s->pic, s->emu.gusirq);
301 AUD_set_active_out (s->voice, 1);
303 register_savevm ("gus", 0, 2, GUS_save, GUS_load, s);
307 int GUS_init (qemu_irq *pic)
309 isa_create_simple ("gus");
313 static ISADeviceInfo gus_info = {
315 .qdev.desc = "Gravis Ultrasound GF1",
316 .qdev.size = sizeof (GUSState),
318 .qdev.props = (Property[]) {
319 DEFINE_PROP_UINT32 ("freq", GUSState, freq, 44100),
320 DEFINE_PROP_HEX32 ("iobase", GUSState, port, 0x240),
321 DEFINE_PROP_UINT32 ("irq", GUSState, emu.gusirq, 7),
322 DEFINE_PROP_UINT32 ("dma", GUSState, emu.gusdma, 3),
323 DEFINE_PROP_END_OF_LIST (),
327 static void gus_register (void)
329 isa_qdev_register (&gus_info);
331 device_init (gus_register)