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24#include "qemu/osdep.h"
25#include "qapi/error.h"
26#include "hw/hw.h"
27#include "hw/audio/audio.h"
28#include "audio/audio.h"
29#include "hw/isa/isa.h"
30#include "gusemu.h"
31#include "gustate.h"
32
33#define dolog(...) AUD_log ("audio", __VA_ARGS__)
34#ifdef DEBUG
35#define ldebug(...) dolog (__VA_ARGS__)
36#else
37#define ldebug(...)
38#endif
39
40#ifdef HOST_WORDS_BIGENDIAN
41#define GUS_ENDIANNESS 1
42#else
43#define GUS_ENDIANNESS 0
44#endif
45
46#define TYPE_GUS "gus"
47#define GUS(obj) OBJECT_CHECK (GUSState, (obj), TYPE_GUS)
48
49typedef struct GUSState {
50 ISADevice dev;
51 GUSEmuState emu;
52 QEMUSoundCard card;
53 uint32_t freq;
54 uint32_t port;
55 int pos, left, shift, irqs;
56 GUSsample *mixbuf;
57 uint8_t himem[1024 * 1024 + 32 + 4096];
58 int samples;
59 SWVoiceOut *voice;
60 int64_t last_ticks;
61 qemu_irq pic;
62 IsaDma *isa_dma;
63} GUSState;
64
65static uint32_t gus_readb(void *opaque, uint32_t nport)
66{
67 GUSState *s = opaque;
68
69 return gus_read (&s->emu, nport, 1);
70}
71
72static void gus_writeb(void *opaque, uint32_t nport, uint32_t val)
73{
74 GUSState *s = opaque;
75
76 gus_write (&s->emu, nport, 1, val);
77}
78
79static int write_audio (GUSState *s, int samples)
80{
81 int net = 0;
82 int pos = s->pos;
83
84 while (samples) {
85 int nbytes, wbytes, wsampl;
86
87 nbytes = samples << s->shift;
88 wbytes = AUD_write (
89 s->voice,
90 s->mixbuf + (pos << (s->shift - 1)),
91 nbytes
92 );
93
94 if (wbytes) {
95 wsampl = wbytes >> s->shift;
96
97 samples -= wsampl;
98 pos = (pos + wsampl) % s->samples;
99
100 net += wsampl;
101 }
102 else {
103 break;
104 }
105 }
106
107 return net;
108}
109
110static void GUS_callback (void *opaque, int free)
111{
112 int samples, to_play, net = 0;
113 GUSState *s = opaque;
114
115 samples = free >> s->shift;
116 to_play = audio_MIN (samples, s->left);
117
118 while (to_play) {
119 int written = write_audio (s, to_play);
120
121 if (!written) {
122 goto reset;
123 }
124
125 s->left -= written;
126 to_play -= written;
127 samples -= written;
128 net += written;
129 }
130
131 samples = audio_MIN (samples, s->samples);
132 if (samples) {
133 gus_mixvoices (&s->emu, s->freq, samples, s->mixbuf);
134
135 while (samples) {
136 int written = write_audio (s, samples);
137 if (!written) {
138 break;
139 }
140 samples -= written;
141 net += written;
142 }
143 }
144 s->left = samples;
145
146 reset:
147 gus_irqgen (&s->emu, muldiv64 (net, 1000000, s->freq));
148}
149
150int GUS_irqrequest (GUSEmuState *emu, int hwirq, int n)
151{
152 GUSState *s = emu->opaque;
153
154 qemu_irq_raise (s->pic);
155 s->irqs += n;
156 ldebug ("irqrequest %d %d %d\n", hwirq, n, s->irqs);
157 return n;
158}
159
160void GUS_irqclear (GUSEmuState *emu, int hwirq)
161{
162 GUSState *s = emu->opaque;
163 ldebug ("irqclear %d %d\n", hwirq, s->irqs);
164 qemu_irq_lower (s->pic);
165 s->irqs -= 1;
166#ifdef IRQ_STORM
167 if (s->irqs > 0) {
168 qemu_irq_raise (s->pic[hwirq]);
169 }
170#endif
171}
172
173void GUS_dmarequest (GUSEmuState *emu)
174{
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);
179}
180
181static int GUS_read_DMA (void *opaque, int nchan, int dma_pos, int dma_len)
182{
183 GUSState *s = opaque;
184 IsaDmaClass *k = ISADMA_GET_CLASS(s->isa_dma);
185 char tmpbuf[4096];
186 int pos = dma_pos, mode, left = dma_len - dma_pos;
187
188 ldebug ("read DMA %#x %d\n", dma_pos, dma_len);
189 mode = k->has_autoinitialization(s->isa_dma, s->emu.gusdma);
190 while (left) {
191 int to_copy = audio_MIN ((size_t) left, sizeof (tmpbuf));
192 int copied;
193
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);
197 left -= copied;
198 pos += copied;
199 }
200
201 if (((mode >> 4) & 1) == 0) {
202 k->release_DREQ(s->isa_dma, s->emu.gusdma);
203 }
204 return dma_len;
205}
206
207static const VMStateDescription vmstate_gus = {
208 .name = "gus",
209 .version_id = 2,
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 ()
220 }
221};
222
223static 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 (),
228};
229
230static const MemoryRegionPortio gus_portio_list2[] = {
231 {0, 2, 1, .read = gus_readb },
232 PORTIO_END_OF_LIST (),
233};
234
235static void gus_realizefn (DeviceState *dev, Error **errp)
236{
237 ISADevice *d = ISA_DEVICE(dev);
238 GUSState *s = GUS (dev);
239 IsaDmaClass *k;
240 struct audsettings as;
241
242 AUD_register_card ("gus", &s->card);
243
244 as.freq = s->freq;
245 as.nchannels = 2;
246 as.fmt = AUD_FMT_S16;
247 as.endianness = GUS_ENDIANNESS;
248
249 s->voice = AUD_open_out (
250 &s->card,
251 NULL,
252 "gus",
253 s,
254 GUS_callback,
255 &as
256 );
257
258 if (!s->voice) {
259 AUD_remove_card (&s->card);
260 error_setg(errp, "No voice");
261 return;
262 }
263
264 s->shift = 2;
265 s->samples = AUD_get_buffer_size_out (s->voice) >> s->shift;
266 s->mixbuf = g_malloc0 (s->samples << s->shift);
267
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");
271
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;
277 s->emu.opaque = s;
278 isa_init_irq (d, &s->pic, s->emu.gusirq);
279
280 AUD_set_active_out (s->voice, 1);
281}
282
283static int GUS_init (ISABus *bus)
284{
285 isa_create_simple (bus, TYPE_GUS);
286 return 0;
287}
288
289static 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 (),
295};
296
297static void gus_class_initfn (ObjectClass *klass, void *data)
298{
299 DeviceClass *dc = DEVICE_CLASS (klass);
300
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;
306}
307
308static const TypeInfo gus_info = {
309 .name = TYPE_GUS,
310 .parent = TYPE_ISA_DEVICE,
311 .instance_size = sizeof (GUSState),
312 .class_init = gus_class_initfn,
313};
314
315static void gus_register_types (void)
316{
317 type_register_static (&gus_info);
318 isa_register_soundhw("gus", "Gravis Ultrasound GF1", GUS_init);
319}
320
321type_init (gus_register_types)
322
