xref: /openbmc/qemu/hw/audio/gus.c (revision 6a015046) 
1 /*
2  * QEMU Proxy for Gravis Ultrasound GF1 emulation by Tibor "TS" Schütz
3  *
4  * Copyright (c) 2002-2005 Vassili Karpov (malc)
5  *
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:
12  *
13  * The above copyright notice and this permission notice shall be included in
14  * all copies or substantial portions of the Software.
15  *
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
22  * THE SOFTWARE.
23  */
24 
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"
46 OBJECT_DECLARE_SIMPLE_TYPE(GUSState, GUS)
47 
48 struct 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 
66 static 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 
73 static 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 
80 static 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 
111 static 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 
151 int GUS_irqrequest (GUSEmuState *emu, int hwirq, int n)
152 {
153     GUSState *s = emu->opaque;
154     /* qemu_irq_lower (s->pic); */
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 
161 void 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 
174 void 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 
182 static 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 
208 static 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 
224 static 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 
231 static const MemoryRegionPortio gus_portio_list2[] = {
232     {0, 2, 1, .read = gus_readb },
233     PORTIO_END_OF_LIST (),
234 };
235 
236 static void gus_realizefn (DeviceState *dev, Error **errp)
237 {
238     ISADevice *d = ISA_DEVICE(dev);
239     ISABus *bus = isa_bus_from_device(d);
240     GUSState *s = GUS (dev);
241     IsaDmaClass *k;
242     struct audsettings as;
243 
244     s->isa_dma = isa_bus_get_dma(bus, s->emu.gusdma);
245     if (!s->isa_dma) {
246         error_setg(errp, "ISA controller does not support DMA");
247         return;
248     }
249 
250     AUD_register_card ("gus", &s->card);
251 
252     as.freq = s->freq;
253     as.nchannels = 2;
254     as.fmt = AUDIO_FORMAT_S16;
255     as.endianness = AUDIO_HOST_ENDIANNESS;
256 
257     s->voice = AUD_open_out (
258         &s->card,
259         NULL,
260         "gus",
261         s,
262         GUS_callback,
263         &as
264         );
265 
266     if (!s->voice) {
267         AUD_remove_card (&s->card);
268         error_setg(errp, "No voice");
269         return;
270     }
271 
272     s->shift = 2;
273     s->samples = AUD_get_buffer_size_out (s->voice) >> s->shift;
274     s->mixbuf = g_malloc0 (s->samples << s->shift);
275 
276     isa_register_portio_list(d, &s->portio_list1, s->port,
277                              gus_portio_list1, s, "gus");
278     isa_register_portio_list(d, &s->portio_list2, (s->port + 0x100) & 0xf00,
279                              gus_portio_list2, s, "gus");
280 
281     k = ISADMA_GET_CLASS(s->isa_dma);
282     k->register_channel(s->isa_dma, s->emu.gusdma, GUS_read_DMA, s);
283     s->emu.himemaddr = s->himem;
284     s->emu.gusdatapos = s->emu.himemaddr + 1024 * 1024 + 32;
285     s->emu.opaque = s;
286     s->pic = isa_bus_get_irq(bus, s->emu.gusirq);
287 
288     AUD_set_active_out (s->voice, 1);
289 }
290 
291 static Property gus_properties[] = {
292     DEFINE_AUDIO_PROPERTIES(GUSState, card),
293     DEFINE_PROP_UINT32 ("freq",    GUSState, freq,        44100),
294     DEFINE_PROP_UINT32 ("iobase",  GUSState, port,        0x240),
295     DEFINE_PROP_UINT32 ("irq",     GUSState, emu.gusirq,  7),
296     DEFINE_PROP_UINT32 ("dma",     GUSState, emu.gusdma,  3),
297     DEFINE_PROP_END_OF_LIST (),
298 };
299 
300 static void gus_class_initfn (ObjectClass *klass, void *data)
301 {
302     DeviceClass *dc = DEVICE_CLASS (klass);
303 
304     dc->realize = gus_realizefn;
305     set_bit(DEVICE_CATEGORY_SOUND, dc->categories);
306     dc->desc = "Gravis Ultrasound GF1";
307     dc->vmsd = &vmstate_gus;
308     device_class_set_props(dc, gus_properties);
309 }
310 
311 static const TypeInfo gus_info = {
312     .name          = TYPE_GUS,
313     .parent        = TYPE_ISA_DEVICE,
314     .instance_size = sizeof (GUSState),
315     .class_init    = gus_class_initfn,
316 };
317 
318 static void gus_register_types (void)
319 {
320     type_register_static (&gus_info);
321     deprecated_register_soundhw("gus", "Gravis Ultrasound GF1", 1, TYPE_GUS);
322 }
323 
324 type_init (gus_register_types)
325