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25#include "qemu/osdep.h"
26#include "qapi/error.h"
27#include "qemu/module.h"
28#include "hw/audio/soundhw.h"
29#include "audio/audio.h"
30#include "hw/irq.h"
31#include "hw/isa/isa.h"
32#include "hw/qdev-properties.h"
33#include "migration/vmstate.h"
34#include "gusemu.h"
35#include "gustate.h"
36#include "qom/object.h"
37
38#define dolog(...) AUD_log ("audio", __VA_ARGS__)
39#ifdef DEBUG
40#define ldebug(...) dolog (__VA_ARGS__)
41#else
42#define ldebug(...)
43#endif
44
45#define TYPE_GUS "gus"
46OBJECT_DECLARE_SIMPLE_TYPE(GUSState, GUS)
47
48struct GUSState {
49 ISADevice dev;
50 GUSEmuState emu;
51 QEMUSoundCard card;
52 uint32_t freq;
53 uint32_t port;
54 int pos, left, shift, irqs;
55 int16_t *mixbuf;
56 uint8_t himem[1024 * 1024 + 32 + 4096];
57 int samples;
58 SWVoiceOut *voice;
59 int64_t last_ticks;
60 qemu_irq pic;
61 IsaDma *isa_dma;
62 PortioList portio_list1;
63 PortioList portio_list2;
64};
65
66static uint32_t gus_readb(void *opaque, uint32_t nport)
67{
68 GUSState *s = opaque;
69
70 return gus_read (&s->emu, nport, 1);
71}
72
73static void gus_writeb(void *opaque, uint32_t nport, uint32_t val)
74{
75 GUSState *s = opaque;
76
77 gus_write (&s->emu, nport, 1, val);
78}
79
80static int write_audio (GUSState *s, int samples)
81{
82 int net = 0;
83 int pos = s->pos;
84
85 while (samples) {
86 int nbytes, wbytes, wsampl;
87
88 nbytes = samples << s->shift;
89 wbytes = AUD_write (
90 s->voice,
91 s->mixbuf + (pos << (s->shift - 1)),
92 nbytes
93 );
94
95 if (wbytes) {
96 wsampl = wbytes >> s->shift;
97
98 samples -= wsampl;
99 pos = (pos + wsampl) % s->samples;
100
101 net += wsampl;
102 }
103 else {
104 break;
105 }
106 }
107
108 return net;
109}
110
111static void GUS_callback (void *opaque, int free)
112{
113 int samples, to_play, net = 0;
114 GUSState *s = opaque;
115
116 samples = free >> s->shift;
117 to_play = MIN (samples, s->left);
118
119 while (to_play) {
120 int written = write_audio (s, to_play);
121
122 if (!written) {
123 goto reset;
124 }
125
126 s->left -= written;
127 to_play -= written;
128 samples -= written;
129 net += written;
130 }
131
132 samples = MIN (samples, s->samples);
133 if (samples) {
134 gus_mixvoices (&s->emu, s->freq, samples, s->mixbuf);
135
136 while (samples) {
137 int written = write_audio (s, samples);
138 if (!written) {
139 break;
140 }
141 samples -= written;
142 net += written;
143 }
144 }
145 s->left = samples;
146
147 reset:
148 gus_irqgen (&s->emu, (uint64_t)net * 1000000 / s->freq);
149}
150
151int GUS_irqrequest (GUSEmuState *emu, int hwirq, int n)
152{
153 GUSState *s = emu->opaque;
154
155 qemu_irq_raise (s->pic);
156 s->irqs += n;
157 ldebug ("irqrequest %d %d %d\n", hwirq, n, s->irqs);
158 return n;
159}
160
161void GUS_irqclear (GUSEmuState *emu, int hwirq)
162{
163 GUSState *s = emu->opaque;
164 ldebug ("irqclear %d %d\n", hwirq, s->irqs);
165 qemu_irq_lower (s->pic);
166 s->irqs -= 1;
167#ifdef IRQ_STORM
168 if (s->irqs > 0) {
169 qemu_irq_raise (s->pic[hwirq]);
170 }
171#endif
172}
173
174void GUS_dmarequest (GUSEmuState *emu)
175{
176 GUSState *s = emu->opaque;
177 IsaDmaClass *k = ISADMA_GET_CLASS(s->isa_dma);
178 ldebug ("dma request %d\n", der->gusdma);
179 k->hold_DREQ(s->isa_dma, s->emu.gusdma);
180}
181
182static int GUS_read_DMA (void *opaque, int nchan, int dma_pos, int dma_len)
183{
184 GUSState *s = opaque;
185 IsaDmaClass *k = ISADMA_GET_CLASS(s->isa_dma);
186 char tmpbuf[4096];
187 int pos = dma_pos, mode, left = dma_len - dma_pos;
188
189 ldebug ("read DMA %#x %d\n", dma_pos, dma_len);
190 mode = k->has_autoinitialization(s->isa_dma, s->emu.gusdma);
191 while (left) {
192 int to_copy = MIN ((size_t) left, sizeof (tmpbuf));
193 int copied;
194
195 ldebug ("left=%d to_copy=%d pos=%d\n", left, to_copy, pos);
196 copied = k->read_memory(s->isa_dma, nchan, tmpbuf, pos, to_copy);
197 gus_dma_transferdata (&s->emu, tmpbuf, copied, left == copied);
198 left -= copied;
199 pos += copied;
200 }
201
202 if (((mode >> 4) & 1) == 0) {
203 k->release_DREQ(s->isa_dma, s->emu.gusdma);
204 }
205 return dma_len;
206}
207
208static const VMStateDescription vmstate_gus = {
209 .name = "gus",
210 .version_id = 2,
211 .minimum_version_id = 2,
212 .fields = (VMStateField[]) {
213 VMSTATE_INT32 (pos, GUSState),
214 VMSTATE_INT32 (left, GUSState),
215 VMSTATE_INT32 (shift, GUSState),
216 VMSTATE_INT32 (irqs, GUSState),
217 VMSTATE_INT32 (samples, GUSState),
218 VMSTATE_INT64 (last_ticks, GUSState),
219 VMSTATE_BUFFER (himem, GUSState),
220 VMSTATE_END_OF_LIST ()
221 }
222};
223
224static const MemoryRegionPortio gus_portio_list1[] = {
225 {0x000, 1, 1, .write = gus_writeb },
226 {0x006, 10, 1, .read = gus_readb, .write = gus_writeb },
227 {0x100, 8, 1, .read = gus_readb, .write = gus_writeb },
228 PORTIO_END_OF_LIST (),
229};
230
231static const MemoryRegionPortio gus_portio_list2[] = {
232 {0, 2, 1, .read = gus_readb },
233 PORTIO_END_OF_LIST (),
234};
235
236static void gus_realizefn (DeviceState *dev, Error **errp)
237{
238 ISADevice *d = ISA_DEVICE(dev);
239 GUSState *s = GUS (dev);
240 IsaDmaClass *k;
241 struct audsettings as;
242
243 s->isa_dma = isa_get_dma(isa_bus_from_device(d), s->emu.gusdma);
244 if (!s->isa_dma) {
245 error_setg(errp, "ISA controller does not support DMA");
246 return;
247 }
248
249 AUD_register_card ("gus", &s->card);
250
251 as.freq = s->freq;
252 as.nchannels = 2;
253 as.fmt = AUDIO_FORMAT_S16;
254 as.endianness = AUDIO_HOST_ENDIANNESS;
255
256 s->voice = AUD_open_out (
257 &s->card,
258 NULL,
259 "gus",
260 s,
261 GUS_callback,
262 &as
263 );
264
265 if (!s->voice) {
266 AUD_remove_card (&s->card);
267 error_setg(errp, "No voice");
268 return;
269 }
270
271 s->shift = 2;
272 s->samples = AUD_get_buffer_size_out (s->voice) >> s->shift;
273 s->mixbuf = g_malloc0 (s->samples << s->shift);
274
275 isa_register_portio_list(d, &s->portio_list1, s->port,
276 gus_portio_list1, s, "gus");
277 isa_register_portio_list(d, &s->portio_list2, (s->port + 0x100) & 0xf00,
278 gus_portio_list2, s, "gus");
279
280 k = ISADMA_GET_CLASS(s->isa_dma);
281 k->register_channel(s->isa_dma, s->emu.gusdma, GUS_read_DMA, s);
282 s->emu.himemaddr = s->himem;
283 s->emu.gusdatapos = s->emu.himemaddr + 1024 * 1024 + 32;
284 s->emu.opaque = s;
285 isa_init_irq (d, &s->pic, s->emu.gusirq);
286
287 AUD_set_active_out (s->voice, 1);
288}
289
290static Property gus_properties[] = {
291 DEFINE_AUDIO_PROPERTIES(GUSState, card),
292 DEFINE_PROP_UINT32 ("freq", GUSState, freq, 44100),
293 DEFINE_PROP_UINT32 ("iobase", GUSState, port, 0x240),
294 DEFINE_PROP_UINT32 ("irq", GUSState, emu.gusirq, 7),
295 DEFINE_PROP_UINT32 ("dma", GUSState, emu.gusdma, 3),
296 DEFINE_PROP_END_OF_LIST (),
297};
298
299static void gus_class_initfn (ObjectClass *klass, void *data)
300{
301 DeviceClass *dc = DEVICE_CLASS (klass);
302
303 dc->realize = gus_realizefn;
304 set_bit(DEVICE_CATEGORY_SOUND, dc->categories);
305 dc->desc = "Gravis Ultrasound GF1";
306 dc->vmsd = &vmstate_gus;
307 device_class_set_props(dc, gus_properties);
308}
309
310static const TypeInfo gus_info = {
311 .name = TYPE_GUS,
312 .parent = TYPE_ISA_DEVICE,
313 .instance_size = sizeof (GUSState),
314 .class_init = gus_class_initfn,
315};
316
317static void gus_register_types (void)
318{
319 type_register_static (&gus_info);
320 deprecated_register_soundhw("gus", "Gravis Ultrasound GF1", 1, TYPE_GUS);
321}
322
323type_init (gus_register_types)
324
