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
24 #include "qemu/osdep.h"
26 #include "hw/audio/audio.h"
27 #include "audio/audio.h"
28 #include "hw/isa/isa.h"
32 #define dolog(...) AUD_log ("audio", __VA_ARGS__)
34 #define ldebug(...) dolog (__VA_ARGS__)
39 #ifdef HOST_WORDS_BIGENDIAN
40 #define GUS_ENDIANNESS 1
42 #define GUS_ENDIANNESS 0
45 #define TYPE_GUS "gus"
46 #define GUS(obj) OBJECT_CHECK (GUSState, (obj), TYPE_GUS)
48 typedef struct GUSState {
54 int pos, left, shift, irqs;
56 uint8_t himem[1024 * 1024 + 32 + 4096];
64 static uint32_t gus_readb(void *opaque, uint32_t nport)
68 return gus_read (&s->emu, nport, 1);
71 static void gus_writeb(void *opaque, uint32_t nport, uint32_t val)
75 gus_write (&s->emu, nport, 1, val);
78 static int write_audio (GUSState *s, int samples)
84 int nbytes, wbytes, wsampl;
86 nbytes = samples << s->shift;
89 s->mixbuf + (pos << (s->shift - 1)),
94 wsampl = wbytes >> s->shift;
97 pos = (pos + wsampl) % s->samples;
109 static void GUS_callback (void *opaque, int free)
111 int samples, to_play, net = 0;
112 GUSState *s = opaque;
114 samples = free >> s->shift;
115 to_play = audio_MIN (samples, s->left);
118 int written = write_audio (s, to_play);
130 samples = audio_MIN (samples, s->samples);
132 gus_mixvoices (&s->emu, s->freq, samples, s->mixbuf);
135 int written = write_audio (s, samples);
146 gus_irqgen (&s->emu, muldiv64 (net, 1000000, s->freq));
149 int GUS_irqrequest (GUSEmuState *emu, int hwirq, int n)
151 GUSState *s = emu->opaque;
152 /* qemu_irq_lower (s->pic); */
153 qemu_irq_raise (s->pic);
155 ldebug ("irqrequest %d %d %d\n", hwirq, n, s->irqs);
159 void GUS_irqclear (GUSEmuState *emu, int hwirq)
161 GUSState *s = emu->opaque;
162 ldebug ("irqclear %d %d\n", hwirq, s->irqs);
163 qemu_irq_lower (s->pic);
167 qemu_irq_raise (s->pic[hwirq]);
172 void GUS_dmarequest (GUSEmuState *emu)
174 GUSState *s = emu->opaque;
175 IsaDmaClass *k = ISADMA_GET_CLASS(s->isa_dma);
176 ldebug ("dma request %d\n", der->gusdma);
177 k->hold_DREQ(s->isa_dma, s->emu.gusdma);
180 static int GUS_read_DMA (void *opaque, int nchan, int dma_pos, int dma_len)
182 GUSState *s = opaque;
183 IsaDmaClass *k = ISADMA_GET_CLASS(s->isa_dma);
185 int pos = dma_pos, mode, left = dma_len - dma_pos;
187 ldebug ("read DMA %#x %d\n", dma_pos, dma_len);
188 mode = k->has_autoinitialization(s->isa_dma, s->emu.gusdma);
190 int to_copy = audio_MIN ((size_t) left, sizeof (tmpbuf));
193 ldebug ("left=%d to_copy=%d pos=%d\n", left, to_copy, pos);
194 copied = k->read_memory(s->isa_dma, nchan, tmpbuf, pos, to_copy);
195 gus_dma_transferdata (&s->emu, tmpbuf, copied, left == copied);
200 if (((mode >> 4) & 1) == 0) {
201 k->release_DREQ(s->isa_dma, s->emu.gusdma);
206 static const VMStateDescription vmstate_gus = {
209 .minimum_version_id = 2,
210 .fields = (VMStateField[]) {
211 VMSTATE_INT32 (pos, GUSState),
212 VMSTATE_INT32 (left, GUSState),
213 VMSTATE_INT32 (shift, GUSState),
214 VMSTATE_INT32 (irqs, GUSState),
215 VMSTATE_INT32 (samples, GUSState),
216 VMSTATE_INT64 (last_ticks, GUSState),
217 VMSTATE_BUFFER (himem, GUSState),
218 VMSTATE_END_OF_LIST ()
222 static const MemoryRegionPortio gus_portio_list1[] = {
223 {0x000, 1, 1, .write = gus_writeb },
224 {0x006, 10, 1, .read = gus_readb, .write = gus_writeb },
225 {0x100, 8, 1, .read = gus_readb, .write = gus_writeb },
226 PORTIO_END_OF_LIST (),
229 static const MemoryRegionPortio gus_portio_list2[] = {
230 {0, 2, 1, .read = gus_readb },
231 PORTIO_END_OF_LIST (),
234 static void gus_realizefn (DeviceState *dev, Error **errp)
236 ISADevice *d = ISA_DEVICE(dev);
237 GUSState *s = GUS (dev);
239 struct audsettings as;
241 AUD_register_card ("gus", &s->card);
245 as.fmt = AUD_FMT_S16;
246 as.endianness = GUS_ENDIANNESS;
248 s->voice = AUD_open_out (
258 AUD_remove_card (&s->card);
259 error_setg(errp, "No voice");
264 s->samples = AUD_get_buffer_size_out (s->voice) >> s->shift;
265 s->mixbuf = g_malloc0 (s->samples << s->shift);
267 isa_register_portio_list (d, s->port, gus_portio_list1, s, "gus");
268 isa_register_portio_list (d, (s->port + 0x100) & 0xf00,
269 gus_portio_list2, s, "gus");
271 s->isa_dma = isa_get_dma(isa_bus_from_device(d), s->emu.gusdma);
272 k = ISADMA_GET_CLASS(s->isa_dma);
273 k->register_channel(s->isa_dma, s->emu.gusdma, GUS_read_DMA, s);
274 s->emu.himemaddr = s->himem;
275 s->emu.gusdatapos = s->emu.himemaddr + 1024 * 1024 + 32;
277 isa_init_irq (d, &s->pic, s->emu.gusirq);
279 AUD_set_active_out (s->voice, 1);
282 static int GUS_init (ISABus *bus)
284 isa_create_simple (bus, TYPE_GUS);
288 static Property gus_properties[] = {
289 DEFINE_PROP_UINT32 ("freq", GUSState, freq, 44100),
290 DEFINE_PROP_UINT32 ("iobase", GUSState, port, 0x240),
291 DEFINE_PROP_UINT32 ("irq", GUSState, emu.gusirq, 7),
292 DEFINE_PROP_UINT32 ("dma", GUSState, emu.gusdma, 3),
293 DEFINE_PROP_END_OF_LIST (),
296 static void gus_class_initfn (ObjectClass *klass, void *data)
298 DeviceClass *dc = DEVICE_CLASS (klass);
300 dc->realize = gus_realizefn;
301 set_bit(DEVICE_CATEGORY_SOUND, dc->categories);
302 dc->desc = "Gravis Ultrasound GF1";
303 dc->vmsd = &vmstate_gus;
304 dc->props = gus_properties;
307 static const TypeInfo gus_info = {
309 .parent = TYPE_ISA_DEVICE,
310 .instance_size = sizeof (GUSState),
311 .class_init = gus_class_initfn,
314 static void gus_register_types (void)
316 type_register_static (&gus_info);
317 isa_register_soundhw("gus", "Gravis Ultrasound GF1", GUS_init);
320 type_init (gus_register_types)