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"
25 #include "qapi/error.h"
27 #include "hw/audio/audio.h"
28 #include "audio/audio.h"
29 #include "hw/isa/isa.h"
33 #define dolog(...) AUD_log ("audio", __VA_ARGS__)
35 #define ldebug(...) dolog (__VA_ARGS__)
40 #ifdef HOST_WORDS_BIGENDIAN
41 #define GUS_ENDIANNESS 1
43 #define GUS_ENDIANNESS 0
46 #define TYPE_GUS "gus"
47 #define GUS(obj) OBJECT_CHECK (GUSState, (obj), TYPE_GUS)
49 typedef struct GUSState {
55 int pos, left, shift, irqs;
57 uint8_t himem[1024 * 1024 + 32 + 4096];
65 static uint32_t gus_readb(void *opaque, uint32_t nport)
69 return gus_read (&s->emu, nport, 1);
72 static void gus_writeb(void *opaque, uint32_t nport, uint32_t val)
76 gus_write (&s->emu, nport, 1, val);
79 static int write_audio (GUSState *s, int samples)
85 int nbytes, wbytes, wsampl;
87 nbytes = samples << s->shift;
90 s->mixbuf + (pos << (s->shift - 1)),
95 wsampl = wbytes >> s->shift;
98 pos = (pos + wsampl) % s->samples;
110 static void GUS_callback (void *opaque, int free)
112 int samples, to_play, net = 0;
113 GUSState *s = opaque;
115 samples = free >> s->shift;
116 to_play = audio_MIN (samples, s->left);
119 int written = write_audio (s, to_play);
131 samples = audio_MIN (samples, s->samples);
133 gus_mixvoices (&s->emu, s->freq, samples, s->mixbuf);
136 int written = write_audio (s, samples);
147 gus_irqgen (&s->emu, muldiv64 (net, 1000000, s->freq));
150 int GUS_irqrequest (GUSEmuState *emu, int hwirq, int n)
152 GUSState *s = emu->opaque;
153 /* qemu_irq_lower (s->pic); */
154 qemu_irq_raise (s->pic);
156 ldebug ("irqrequest %d %d %d\n", hwirq, n, s->irqs);
160 void GUS_irqclear (GUSEmuState *emu, int hwirq)
162 GUSState *s = emu->opaque;
163 ldebug ("irqclear %d %d\n", hwirq, s->irqs);
164 qemu_irq_lower (s->pic);
168 qemu_irq_raise (s->pic[hwirq]);
173 void GUS_dmarequest (GUSEmuState *emu)
175 GUSState *s = emu->opaque;
176 IsaDmaClass *k = ISADMA_GET_CLASS(s->isa_dma);
177 ldebug ("dma request %d\n", der->gusdma);
178 k->hold_DREQ(s->isa_dma, s->emu.gusdma);
181 static int GUS_read_DMA (void *opaque, int nchan, int dma_pos, int dma_len)
183 GUSState *s = opaque;
184 IsaDmaClass *k = ISADMA_GET_CLASS(s->isa_dma);
186 int pos = dma_pos, mode, left = dma_len - dma_pos;
188 ldebug ("read DMA %#x %d\n", dma_pos, dma_len);
189 mode = k->has_autoinitialization(s->isa_dma, s->emu.gusdma);
191 int to_copy = audio_MIN ((size_t) left, sizeof (tmpbuf));
194 ldebug ("left=%d to_copy=%d pos=%d\n", left, to_copy, pos);
195 copied = k->read_memory(s->isa_dma, nchan, tmpbuf, pos, to_copy);
196 gus_dma_transferdata (&s->emu, tmpbuf, copied, left == copied);
201 if (((mode >> 4) & 1) == 0) {
202 k->release_DREQ(s->isa_dma, s->emu.gusdma);
207 static const VMStateDescription vmstate_gus = {
210 .minimum_version_id = 2,
211 .fields = (VMStateField[]) {
212 VMSTATE_INT32 (pos, GUSState),
213 VMSTATE_INT32 (left, GUSState),
214 VMSTATE_INT32 (shift, GUSState),
215 VMSTATE_INT32 (irqs, GUSState),
216 VMSTATE_INT32 (samples, GUSState),
217 VMSTATE_INT64 (last_ticks, GUSState),
218 VMSTATE_BUFFER (himem, GUSState),
219 VMSTATE_END_OF_LIST ()
223 static const MemoryRegionPortio gus_portio_list1[] = {
224 {0x000, 1, 1, .write = gus_writeb },
225 {0x006, 10, 1, .read = gus_readb, .write = gus_writeb },
226 {0x100, 8, 1, .read = gus_readb, .write = gus_writeb },
227 PORTIO_END_OF_LIST (),
230 static const MemoryRegionPortio gus_portio_list2[] = {
231 {0, 2, 1, .read = gus_readb },
232 PORTIO_END_OF_LIST (),
235 static void gus_realizefn (DeviceState *dev, Error **errp)
237 ISADevice *d = ISA_DEVICE(dev);
238 GUSState *s = GUS (dev);
240 struct audsettings as;
242 AUD_register_card ("gus", &s->card);
246 as.fmt = AUD_FMT_S16;
247 as.endianness = GUS_ENDIANNESS;
249 s->voice = AUD_open_out (
259 AUD_remove_card (&s->card);
260 error_setg(errp, "No voice");
265 s->samples = AUD_get_buffer_size_out (s->voice) >> s->shift;
266 s->mixbuf = g_malloc0 (s->samples << s->shift);
268 isa_register_portio_list (d, s->port, gus_portio_list1, s, "gus");
269 isa_register_portio_list (d, (s->port + 0x100) & 0xf00,
270 gus_portio_list2, s, "gus");
272 s->isa_dma = isa_get_dma(isa_bus_from_device(d), s->emu.gusdma);
273 k = ISADMA_GET_CLASS(s->isa_dma);
274 k->register_channel(s->isa_dma, s->emu.gusdma, GUS_read_DMA, s);
275 s->emu.himemaddr = s->himem;
276 s->emu.gusdatapos = s->emu.himemaddr + 1024 * 1024 + 32;
278 isa_init_irq (d, &s->pic, s->emu.gusirq);
280 AUD_set_active_out (s->voice, 1);
283 static int GUS_init (ISABus *bus)
285 isa_create_simple (bus, TYPE_GUS);
289 static Property gus_properties[] = {
290 DEFINE_PROP_UINT32 ("freq", GUSState, freq, 44100),
291 DEFINE_PROP_UINT32 ("iobase", GUSState, port, 0x240),
292 DEFINE_PROP_UINT32 ("irq", GUSState, emu.gusirq, 7),
293 DEFINE_PROP_UINT32 ("dma", GUSState, emu.gusdma, 3),
294 DEFINE_PROP_END_OF_LIST (),
297 static void gus_class_initfn (ObjectClass *klass, void *data)
299 DeviceClass *dc = DEVICE_CLASS (klass);
301 dc->realize = gus_realizefn;
302 set_bit(DEVICE_CATEGORY_SOUND, dc->categories);
303 dc->desc = "Gravis Ultrasound GF1";
304 dc->vmsd = &vmstate_gus;
305 dc->props = gus_properties;
308 static const TypeInfo gus_info = {
310 .parent = TYPE_ISA_DEVICE,
311 .instance_size = sizeof (GUSState),
312 .class_init = gus_class_initfn,
315 static void gus_register_types (void)
317 type_register_static (&gus_info);
318 isa_register_soundhw("gus", "Gravis Ultrasound GF1", GUS_init);
321 type_init (gus_register_types)