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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
37#define dolog(...) AUD_log ("audio", __VA_ARGS__)
38#ifdef DEBUG
39#define ldebug(...) dolog (__VA_ARGS__)
40#else
41#define ldebug(...)
42#endif
43
44#ifdef HOST_WORDS_BIGENDIAN
45#define GUS_ENDIANNESS 1
46#else
47#define GUS_ENDIANNESS 0
48#endif
49
50#define TYPE_GUS "gus"
51#define GUS(obj) OBJECT_CHECK (GUSState, (obj), TYPE_GUS)
52
53typedef struct GUSState {
54 ISADevice dev;
55 GUSEmuState emu;
56 QEMUSoundCard card;
57 uint32_t freq;
58 uint32_t port;
59 int pos, left, shift, irqs;
60 int16_t *mixbuf;
61 uint8_t himem[1024 * 1024 + 32 + 4096];
62 int samples;
63 SWVoiceOut *voice;
64 int64_t last_ticks;
65 qemu_irq pic;
66 IsaDma *isa_dma;
67 PortioList portio_list1;
68 PortioList portio_list2;
69} GUSState;
70
71static uint32_t gus_readb(void *opaque, uint32_t nport)
72{
73 GUSState *s = opaque;
74
75 return gus_read (&s->emu, nport, 1);
76}
77
78static void gus_writeb(void *opaque, uint32_t nport, uint32_t val)
79{
80 GUSState *s = opaque;
81
82 gus_write (&s->emu, nport, 1, val);
83}
84
85static int write_audio (GUSState *s, int samples)
86{
87 int net = 0;
88 int pos = s->pos;
89
90 while (samples) {
91 int nbytes, wbytes, wsampl;
92
93 nbytes = samples << s->shift;
94 wbytes = AUD_write (
95 s->voice,
96 s->mixbuf + (pos << (s->shift - 1)),
97 nbytes
98 );
99
100 if (wbytes) {
101 wsampl = wbytes >> s->shift;
102
103 samples -= wsampl;
104 pos = (pos + wsampl) % s->samples;
105
106 net += wsampl;
107 }
108 else {
109 break;
110 }
111 }
112
113 return net;
114}
115
116static void GUS_callback (void *opaque, int free)
117{
118 int samples, to_play, net = 0;
119 GUSState *s = opaque;
120
121 samples = free >> s->shift;
122 to_play = MIN (samples, s->left);
123
124 while (to_play) {
125 int written = write_audio (s, to_play);
126
127 if (!written) {
128 goto reset;
129 }
130
131 s->left -= written;
132 to_play -= written;
133 samples -= written;
134 net += written;
135 }
136
137 samples = MIN (samples, s->samples);
138 if (samples) {
139 gus_mixvoices (&s->emu, s->freq, samples, s->mixbuf);
140
141 while (samples) {
142 int written = write_audio (s, samples);
143 if (!written) {
144 break;
145 }
146 samples -= written;
147 net += written;
148 }
149 }
150 s->left = samples;
151
152 reset:
153 gus_irqgen (&s->emu, (uint64_t)net * 1000000 / s->freq);
154}
155
156int GUS_irqrequest (GUSEmuState *emu, int hwirq, int n)
157{
158 GUSState *s = emu->opaque;
159
160 qemu_irq_raise (s->pic);
161 s->irqs += n;
162 ldebug ("irqrequest %d %d %d\n", hwirq, n, s->irqs);
163 return n;
164}
165
166void GUS_irqclear (GUSEmuState *emu, int hwirq)
167{
168 GUSState *s = emu->opaque;
169 ldebug ("irqclear %d %d\n", hwirq, s->irqs);
170 qemu_irq_lower (s->pic);
171 s->irqs -= 1;
172#ifdef IRQ_STORM
173 if (s->irqs > 0) {
174 qemu_irq_raise (s->pic[hwirq]);
175 }
176#endif
177}
178
179void GUS_dmarequest (GUSEmuState *emu)
180{
181 GUSState *s = emu->opaque;
182 IsaDmaClass *k = ISADMA_GET_CLASS(s->isa_dma);
183 ldebug ("dma request %d\n", der->gusdma);
184 k->hold_DREQ(s->isa_dma, s->emu.gusdma);
185}
186
187static int GUS_read_DMA (void *opaque, int nchan, int dma_pos, int dma_len)
188{
189 GUSState *s = opaque;
190 IsaDmaClass *k = ISADMA_GET_CLASS(s->isa_dma);
191 char tmpbuf[4096];
192 int pos = dma_pos, mode, left = dma_len - dma_pos;
193
194 ldebug ("read DMA %#x %d\n", dma_pos, dma_len);
195 mode = k->has_autoinitialization(s->isa_dma, s->emu.gusdma);
196 while (left) {
197 int to_copy = MIN ((size_t) left, sizeof (tmpbuf));
198 int copied;
199
200 ldebug ("left=%d to_copy=%d pos=%d\n", left, to_copy, pos);
201 copied = k->read_memory(s->isa_dma, nchan, tmpbuf, pos, to_copy);
202 gus_dma_transferdata (&s->emu, tmpbuf, copied, left == copied);
203 left -= copied;
204 pos += copied;
205 }
206
207 if (((mode >> 4) & 1) == 0) {
208 k->release_DREQ(s->isa_dma, s->emu.gusdma);
209 }
210 return dma_len;
211}
212
213static const VMStateDescription vmstate_gus = {
214 .name = "gus",
215 .version_id = 2,
216 .minimum_version_id = 2,
217 .fields = (VMStateField[]) {
218 VMSTATE_INT32 (pos, GUSState),
219 VMSTATE_INT32 (left, GUSState),
220 VMSTATE_INT32 (shift, GUSState),
221 VMSTATE_INT32 (irqs, GUSState),
222 VMSTATE_INT32 (samples, GUSState),
223 VMSTATE_INT64 (last_ticks, GUSState),
224 VMSTATE_BUFFER (himem, GUSState),
225 VMSTATE_END_OF_LIST ()
226 }
227};
228
229static const MemoryRegionPortio gus_portio_list1[] = {
230 {0x000, 1, 1, .write = gus_writeb },
231 {0x006, 10, 1, .read = gus_readb, .write = gus_writeb },
232 {0x100, 8, 1, .read = gus_readb, .write = gus_writeb },
233 PORTIO_END_OF_LIST (),
234};
235
236static const MemoryRegionPortio gus_portio_list2[] = {
237 {0, 2, 1, .read = gus_readb },
238 PORTIO_END_OF_LIST (),
239};
240
241static void gus_realizefn (DeviceState *dev, Error **errp)
242{
243 ISADevice *d = ISA_DEVICE(dev);
244 GUSState *s = GUS (dev);
245 IsaDmaClass *k;
246 struct audsettings as;
247
248 s->isa_dma = isa_get_dma(isa_bus_from_device(d), s->emu.gusdma);
249 if (!s->isa_dma) {
250 error_setg(errp, "ISA controller does not support DMA");
251 return;
252 }
253
254 AUD_register_card ("gus", &s->card);
255
256 as.freq = s->freq;
257 as.nchannels = 2;
258 as.fmt = AUDIO_FORMAT_S16;
259 as.endianness = GUS_ENDIANNESS;
260
261 s->voice = AUD_open_out (
262 &s->card,
263 NULL,
264 "gus",
265 s,
266 GUS_callback,
267 &as
268 );
269
270 if (!s->voice) {
271 AUD_remove_card (&s->card);
272 error_setg(errp, "No voice");
273 return;
274 }
275
276 s->shift = 2;
277 s->samples = AUD_get_buffer_size_out (s->voice) >> s->shift;
278 s->mixbuf = g_malloc0 (s->samples << s->shift);
279
280 isa_register_portio_list(d, &s->portio_list1, s->port,
281 gus_portio_list1, s, "gus");
282 isa_register_portio_list(d, &s->portio_list2, (s->port + 0x100) & 0xf00,
283 gus_portio_list2, s, "gus");
284
285 k = ISADMA_GET_CLASS(s->isa_dma);
286 k->register_channel(s->isa_dma, s->emu.gusdma, GUS_read_DMA, s);
287 s->emu.himemaddr = s->himem;
288 s->emu.gusdatapos = s->emu.himemaddr + 1024 * 1024 + 32;
289 s->emu.opaque = s;
290 isa_init_irq (d, &s->pic, s->emu.gusirq);
291
292 AUD_set_active_out (s->voice, 1);
293}
294
295static int GUS_init (ISABus *bus)
296{
297 isa_create_simple (bus, TYPE_GUS);
298 return 0;
299}
300
301static Property gus_properties[] = {
302 DEFINE_AUDIO_PROPERTIES(GUSState, card),
303 DEFINE_PROP_UINT32 ("freq", GUSState, freq, 44100),
304 DEFINE_PROP_UINT32 ("iobase", GUSState, port, 0x240),
305 DEFINE_PROP_UINT32 ("irq", GUSState, emu.gusirq, 7),
306 DEFINE_PROP_UINT32 ("dma", GUSState, emu.gusdma, 3),
307 DEFINE_PROP_END_OF_LIST (),
308};
309
310static void gus_class_initfn (ObjectClass *klass, void *data)
311{
312 DeviceClass *dc = DEVICE_CLASS (klass);
313
314 dc->realize = gus_realizefn;
315 set_bit(DEVICE_CATEGORY_SOUND, dc->categories);
316 dc->desc = "Gravis Ultrasound GF1";
317 dc->vmsd = &vmstate_gus;
318 dc->props = gus_properties;
319}
320
321static const TypeInfo gus_info = {
322 .name = TYPE_GUS,
323 .parent = TYPE_ISA_DEVICE,
324 .instance_size = sizeof (GUSState),
325 .class_init = gus_class_initfn,
326};
327
328static void gus_register_types (void)
329{
330 type_register_static (&gus_info);
331 isa_register_soundhw("gus", "Gravis Ultrasound GF1", GUS_init);
332}
333
334type_init (gus_register_types)
335
