xref: /qemu/hw/audio/ac97.c (revision 8110fa1d)
1 /*
2  * Copyright (C) 2006 InnoTek Systemberatung GmbH
3  *
4  * This file is part of VirtualBox Open Source Edition (OSE), as
5  * available from http://www.virtualbox.org. This file is free software;
6  * you can redistribute it and/or modify it under the terms of the GNU
7  * General Public License as published by the Free Software Foundation,
8  * in version 2 as it comes in the "COPYING" file of the VirtualBox OSE
9  * distribution. VirtualBox OSE is distributed in the hope that it will
10  * be useful, but WITHOUT ANY WARRANTY of any kind.
11  *
12  * If you received this file as part of a commercial VirtualBox
13  * distribution, then only the terms of your commercial VirtualBox
14  * license agreement apply instead of the previous paragraph.
15  *
16  * Contributions after 2012-01-13 are licensed under the terms of the
17  * GNU GPL, version 2 or (at your option) any later version.
18  */
19 
20 #include "qemu/osdep.h"
21 #include "hw/audio/soundhw.h"
22 #include "audio/audio.h"
23 #include "hw/pci/pci.h"
24 #include "hw/qdev-properties.h"
25 #include "migration/vmstate.h"
26 #include "qemu/module.h"
27 #include "sysemu/dma.h"
28 #include "qom/object.h"
29 
30 enum {
31     AC97_Reset                     = 0x00,
32     AC97_Master_Volume_Mute        = 0x02,
33     AC97_Headphone_Volume_Mute     = 0x04,
34     AC97_Master_Volume_Mono_Mute   = 0x06,
35     AC97_Master_Tone_RL            = 0x08,
36     AC97_PC_BEEP_Volume_Mute       = 0x0A,
37     AC97_Phone_Volume_Mute         = 0x0C,
38     AC97_Mic_Volume_Mute           = 0x0E,
39     AC97_Line_In_Volume_Mute       = 0x10,
40     AC97_CD_Volume_Mute            = 0x12,
41     AC97_Video_Volume_Mute         = 0x14,
42     AC97_Aux_Volume_Mute           = 0x16,
43     AC97_PCM_Out_Volume_Mute       = 0x18,
44     AC97_Record_Select             = 0x1A,
45     AC97_Record_Gain_Mute          = 0x1C,
46     AC97_Record_Gain_Mic_Mute      = 0x1E,
47     AC97_General_Purpose           = 0x20,
48     AC97_3D_Control                = 0x22,
49     AC97_AC_97_RESERVED            = 0x24,
50     AC97_Powerdown_Ctrl_Stat       = 0x26,
51     AC97_Extended_Audio_ID         = 0x28,
52     AC97_Extended_Audio_Ctrl_Stat  = 0x2A,
53     AC97_PCM_Front_DAC_Rate        = 0x2C,
54     AC97_PCM_Surround_DAC_Rate     = 0x2E,
55     AC97_PCM_LFE_DAC_Rate          = 0x30,
56     AC97_PCM_LR_ADC_Rate           = 0x32,
57     AC97_MIC_ADC_Rate              = 0x34,
58     AC97_6Ch_Vol_C_LFE_Mute        = 0x36,
59     AC97_6Ch_Vol_L_R_Surround_Mute = 0x38,
60     AC97_Vendor_Reserved           = 0x58,
61     AC97_Sigmatel_Analog           = 0x6c, /* We emulate a Sigmatel codec */
62     AC97_Sigmatel_Dac2Invert       = 0x6e, /* We emulate a Sigmatel codec */
63     AC97_Vendor_ID1                = 0x7c,
64     AC97_Vendor_ID2                = 0x7e
65 };
66 
67 #define SOFT_VOLUME
68 #define SR_FIFOE 16             /* rwc */
69 #define SR_BCIS  8              /* rwc */
70 #define SR_LVBCI 4              /* rwc */
71 #define SR_CELV  2              /* ro */
72 #define SR_DCH   1              /* ro */
73 #define SR_VALID_MASK ((1 << 5) - 1)
74 #define SR_WCLEAR_MASK (SR_FIFOE | SR_BCIS | SR_LVBCI)
75 #define SR_RO_MASK (SR_DCH | SR_CELV)
76 #define SR_INT_MASK (SR_FIFOE | SR_BCIS | SR_LVBCI)
77 
78 #define CR_IOCE  16             /* rw */
79 #define CR_FEIE  8              /* rw */
80 #define CR_LVBIE 4              /* rw */
81 #define CR_RR    2              /* rw */
82 #define CR_RPBM  1              /* rw */
83 #define CR_VALID_MASK ((1 << 5) - 1)
84 #define CR_DONT_CLEAR_MASK (CR_IOCE | CR_FEIE | CR_LVBIE)
85 
86 #define GC_WR    4              /* rw */
87 #define GC_CR    2              /* rw */
88 #define GC_VALID_MASK ((1 << 6) - 1)
89 
90 #define GS_MD3   (1<<17)        /* rw */
91 #define GS_AD3   (1<<16)        /* rw */
92 #define GS_RCS   (1<<15)        /* rwc */
93 #define GS_B3S12 (1<<14)        /* ro */
94 #define GS_B2S12 (1<<13)        /* ro */
95 #define GS_B1S12 (1<<12)        /* ro */
96 #define GS_S1R1  (1<<11)        /* rwc */
97 #define GS_S0R1  (1<<10)        /* rwc */
98 #define GS_S1CR  (1<<9)         /* ro */
99 #define GS_S0CR  (1<<8)         /* ro */
100 #define GS_MINT  (1<<7)         /* ro */
101 #define GS_POINT (1<<6)         /* ro */
102 #define GS_PIINT (1<<5)         /* ro */
103 #define GS_RSRVD ((1<<4)|(1<<3))
104 #define GS_MOINT (1<<2)         /* ro */
105 #define GS_MIINT (1<<1)         /* ro */
106 #define GS_GSCI  1              /* rwc */
107 #define GS_RO_MASK (GS_B3S12|                   \
108                     GS_B2S12|                   \
109                     GS_B1S12|                   \
110                     GS_S1CR|                    \
111                     GS_S0CR|                    \
112                     GS_MINT|                    \
113                     GS_POINT|                   \
114                     GS_PIINT|                   \
115                     GS_RSRVD|                   \
116                     GS_MOINT|                   \
117                     GS_MIINT)
118 #define GS_VALID_MASK ((1 << 18) - 1)
119 #define GS_WCLEAR_MASK (GS_RCS|GS_S1R1|GS_S0R1|GS_GSCI)
120 
121 #define BD_IOC (1<<31)
122 #define BD_BUP (1<<30)
123 
124 #define EACS_VRA 1
125 #define EACS_VRM 8
126 
127 #define MUTE_SHIFT 15
128 
129 #define TYPE_AC97 "AC97"
130 typedef struct AC97LinkState AC97LinkState;
131 DECLARE_INSTANCE_CHECKER(AC97LinkState, AC97,
132                          TYPE_AC97)
133 
134 #define REC_MASK 7
135 enum {
136     REC_MIC = 0,
137     REC_CD,
138     REC_VIDEO,
139     REC_AUX,
140     REC_LINE_IN,
141     REC_STEREO_MIX,
142     REC_MONO_MIX,
143     REC_PHONE
144 };
145 
146 typedef struct BD {
147     uint32_t addr;
148     uint32_t ctl_len;
149 } BD;
150 
151 typedef struct AC97BusMasterRegs {
152     uint32_t bdbar;             /* rw 0 */
153     uint8_t civ;                /* ro 0 */
154     uint8_t lvi;                /* rw 0 */
155     uint16_t sr;                /* rw 1 */
156     uint16_t picb;              /* ro 0 */
157     uint8_t piv;                /* ro 0 */
158     uint8_t cr;                 /* rw 0 */
159     unsigned int bd_valid;
160     BD bd;
161 } AC97BusMasterRegs;
162 
163 struct AC97LinkState {
164     PCIDevice dev;
165     QEMUSoundCard card;
166     uint32_t glob_cnt;
167     uint32_t glob_sta;
168     uint32_t cas;
169     uint32_t last_samp;
170     AC97BusMasterRegs bm_regs[3];
171     uint8_t mixer_data[256];
172     SWVoiceIn *voice_pi;
173     SWVoiceOut *voice_po;
174     SWVoiceIn *voice_mc;
175     int invalid_freq[3];
176     uint8_t silence[128];
177     int bup_flag;
178     MemoryRegion io_nam;
179     MemoryRegion io_nabm;
180 };
181 
182 enum {
183     BUP_SET = 1,
184     BUP_LAST = 2
185 };
186 
187 #ifdef DEBUG_AC97
188 #define dolog(...) AUD_log ("ac97", __VA_ARGS__)
189 #else
190 #define dolog(...)
191 #endif
192 
193 #define MKREGS(prefix, start)                   \
194 enum {                                          \
195     prefix ## _BDBAR = start,                   \
196     prefix ## _CIV = start + 4,                 \
197     prefix ## _LVI = start + 5,                 \
198     prefix ## _SR = start + 6,                  \
199     prefix ## _PICB = start + 8,                \
200     prefix ## _PIV = start + 10,                \
201     prefix ## _CR = start + 11                  \
202 }
203 
204 enum {
205     PI_INDEX = 0,
206     PO_INDEX,
207     MC_INDEX,
208     LAST_INDEX
209 };
210 
211 MKREGS (PI, PI_INDEX * 16);
212 MKREGS (PO, PO_INDEX * 16);
213 MKREGS (MC, MC_INDEX * 16);
214 
215 enum {
216     GLOB_CNT = 0x2c,
217     GLOB_STA = 0x30,
218     CAS      = 0x34
219 };
220 
221 #define GET_BM(index) (((index) >> 4) & 3)
222 
223 static void po_callback (void *opaque, int free);
224 static void pi_callback (void *opaque, int avail);
225 static void mc_callback (void *opaque, int avail);
226 
227 static void warm_reset (AC97LinkState *s)
228 {
229     (void) s;
230 }
231 
232 static void cold_reset (AC97LinkState * s)
233 {
234     (void) s;
235 }
236 
237 static void fetch_bd (AC97LinkState *s, AC97BusMasterRegs *r)
238 {
239     uint8_t b[8];
240 
241     pci_dma_read (&s->dev, r->bdbar + r->civ * 8, b, 8);
242     r->bd_valid = 1;
243     r->bd.addr = le32_to_cpu (*(uint32_t *) &b[0]) & ~3;
244     r->bd.ctl_len = le32_to_cpu (*(uint32_t *) &b[4]);
245     r->picb = r->bd.ctl_len & 0xffff;
246     dolog ("bd %2d addr=%#x ctl=%#06x len=%#x(%d bytes)\n",
247            r->civ, r->bd.addr, r->bd.ctl_len >> 16,
248            r->bd.ctl_len & 0xffff,
249            (r->bd.ctl_len & 0xffff) << 1);
250 }
251 
252 static void update_sr (AC97LinkState *s, AC97BusMasterRegs *r, uint32_t new_sr)
253 {
254     int event = 0;
255     int level = 0;
256     uint32_t new_mask = new_sr & SR_INT_MASK;
257     uint32_t old_mask = r->sr & SR_INT_MASK;
258     uint32_t masks[] = {GS_PIINT, GS_POINT, GS_MINT};
259 
260     if (new_mask ^ old_mask) {
261         /** @todo is IRQ deasserted when only one of status bits is cleared? */
262         if (!new_mask) {
263             event = 1;
264             level = 0;
265         }
266         else {
267             if ((new_mask & SR_LVBCI) && (r->cr & CR_LVBIE)) {
268                 event = 1;
269                 level = 1;
270             }
271             if ((new_mask & SR_BCIS) && (r->cr & CR_IOCE)) {
272                 event = 1;
273                 level = 1;
274             }
275         }
276     }
277 
278     r->sr = new_sr;
279 
280     dolog ("IOC%d LVB%d sr=%#x event=%d level=%d\n",
281            r->sr & SR_BCIS, r->sr & SR_LVBCI,
282            r->sr,
283            event, level);
284 
285     if (!event)
286         return;
287 
288     if (level) {
289         s->glob_sta |= masks[r - s->bm_regs];
290         dolog ("set irq level=1\n");
291         pci_irq_assert(&s->dev);
292     }
293     else {
294         s->glob_sta &= ~masks[r - s->bm_regs];
295         dolog ("set irq level=0\n");
296         pci_irq_deassert(&s->dev);
297     }
298 }
299 
300 static void voice_set_active (AC97LinkState *s, int bm_index, int on)
301 {
302     switch (bm_index) {
303     case PI_INDEX:
304         AUD_set_active_in (s->voice_pi, on);
305         break;
306 
307     case PO_INDEX:
308         AUD_set_active_out (s->voice_po, on);
309         break;
310 
311     case MC_INDEX:
312         AUD_set_active_in (s->voice_mc, on);
313         break;
314 
315     default:
316         AUD_log ("ac97", "invalid bm_index(%d) in voice_set_active", bm_index);
317         break;
318     }
319 }
320 
321 static void reset_bm_regs (AC97LinkState *s, AC97BusMasterRegs *r)
322 {
323     dolog ("reset_bm_regs\n");
324     r->bdbar = 0;
325     r->civ = 0;
326     r->lvi = 0;
327     /** todo do we need to do that? */
328     update_sr (s, r, SR_DCH);
329     r->picb = 0;
330     r->piv = 0;
331     r->cr = r->cr & CR_DONT_CLEAR_MASK;
332     r->bd_valid = 0;
333 
334     voice_set_active (s, r - s->bm_regs, 0);
335     memset (s->silence, 0, sizeof (s->silence));
336 }
337 
338 static void mixer_store (AC97LinkState *s, uint32_t i, uint16_t v)
339 {
340     if (i + 2 > sizeof (s->mixer_data)) {
341         dolog ("mixer_store: index %d out of bounds %zd\n",
342                i, sizeof (s->mixer_data));
343         return;
344     }
345 
346     s->mixer_data[i + 0] = v & 0xff;
347     s->mixer_data[i + 1] = v >> 8;
348 }
349 
350 static uint16_t mixer_load (AC97LinkState *s, uint32_t i)
351 {
352     uint16_t val = 0xffff;
353 
354     if (i + 2 > sizeof (s->mixer_data)) {
355         dolog ("mixer_load: index %d out of bounds %zd\n",
356                i, sizeof (s->mixer_data));
357     }
358     else {
359         val = s->mixer_data[i + 0] | (s->mixer_data[i + 1] << 8);
360     }
361 
362     return val;
363 }
364 
365 static void open_voice (AC97LinkState *s, int index, int freq)
366 {
367     struct audsettings as;
368 
369     as.freq = freq;
370     as.nchannels = 2;
371     as.fmt = AUDIO_FORMAT_S16;
372     as.endianness = 0;
373 
374     if (freq > 0) {
375         s->invalid_freq[index] = 0;
376         switch (index) {
377         case PI_INDEX:
378             s->voice_pi = AUD_open_in (
379                 &s->card,
380                 s->voice_pi,
381                 "ac97.pi",
382                 s,
383                 pi_callback,
384                 &as
385                 );
386             break;
387 
388         case PO_INDEX:
389             s->voice_po = AUD_open_out (
390                 &s->card,
391                 s->voice_po,
392                 "ac97.po",
393                 s,
394                 po_callback,
395                 &as
396                 );
397             break;
398 
399         case MC_INDEX:
400             s->voice_mc = AUD_open_in (
401                 &s->card,
402                 s->voice_mc,
403                 "ac97.mc",
404                 s,
405                 mc_callback,
406                 &as
407                 );
408             break;
409         }
410     }
411     else {
412         s->invalid_freq[index] = freq;
413         switch (index) {
414         case PI_INDEX:
415             AUD_close_in (&s->card, s->voice_pi);
416             s->voice_pi = NULL;
417             break;
418 
419         case PO_INDEX:
420             AUD_close_out (&s->card, s->voice_po);
421             s->voice_po = NULL;
422             break;
423 
424         case MC_INDEX:
425             AUD_close_in (&s->card, s->voice_mc);
426             s->voice_mc = NULL;
427             break;
428         }
429     }
430 }
431 
432 static void reset_voices (AC97LinkState *s, uint8_t active[LAST_INDEX])
433 {
434     uint16_t freq;
435 
436     freq = mixer_load (s, AC97_PCM_LR_ADC_Rate);
437     open_voice (s, PI_INDEX, freq);
438     AUD_set_active_in (s->voice_pi, active[PI_INDEX]);
439 
440     freq = mixer_load (s, AC97_PCM_Front_DAC_Rate);
441     open_voice (s, PO_INDEX, freq);
442     AUD_set_active_out (s->voice_po, active[PO_INDEX]);
443 
444     freq = mixer_load (s, AC97_MIC_ADC_Rate);
445     open_voice (s, MC_INDEX, freq);
446     AUD_set_active_in (s->voice_mc, active[MC_INDEX]);
447 }
448 
449 static void get_volume (uint16_t vol, uint16_t mask, int inverse,
450                         int *mute, uint8_t *lvol, uint8_t *rvol)
451 {
452     *mute = (vol >> MUTE_SHIFT) & 1;
453     *rvol = (255 * (vol & mask)) / mask;
454     *lvol = (255 * ((vol >> 8) & mask)) / mask;
455 
456     if (inverse) {
457         *rvol = 255 - *rvol;
458         *lvol = 255 - *lvol;
459     }
460 }
461 
462 static void update_combined_volume_out (AC97LinkState *s)
463 {
464     uint8_t lvol, rvol, plvol, prvol;
465     int mute, pmute;
466 
467     get_volume (mixer_load (s, AC97_Master_Volume_Mute), 0x3f, 1,
468                 &mute, &lvol, &rvol);
469     get_volume (mixer_load (s, AC97_PCM_Out_Volume_Mute), 0x1f, 1,
470                 &pmute, &plvol, &prvol);
471 
472     mute = mute | pmute;
473     lvol = (lvol * plvol) / 255;
474     rvol = (rvol * prvol) / 255;
475 
476     AUD_set_volume_out (s->voice_po, mute, lvol, rvol);
477 }
478 
479 static void update_volume_in (AC97LinkState *s)
480 {
481     uint8_t lvol, rvol;
482     int mute;
483 
484     get_volume (mixer_load (s, AC97_Record_Gain_Mute), 0x0f, 0,
485                 &mute, &lvol, &rvol);
486 
487     AUD_set_volume_in (s->voice_pi, mute, lvol, rvol);
488 }
489 
490 static void set_volume (AC97LinkState *s, int index, uint32_t val)
491 {
492     switch (index) {
493     case AC97_Master_Volume_Mute:
494         val &= 0xbf3f;
495         mixer_store (s, index, val);
496         update_combined_volume_out (s);
497         break;
498     case AC97_PCM_Out_Volume_Mute:
499         val &= 0x9f1f;
500         mixer_store (s, index, val);
501         update_combined_volume_out (s);
502         break;
503     case AC97_Record_Gain_Mute:
504         val &= 0x8f0f;
505         mixer_store (s, index, val);
506         update_volume_in (s);
507         break;
508     }
509 }
510 
511 static void record_select (AC97LinkState *s, uint32_t val)
512 {
513     uint8_t rs = val & REC_MASK;
514     uint8_t ls = (val >> 8) & REC_MASK;
515     mixer_store (s, AC97_Record_Select, rs | (ls << 8));
516 }
517 
518 static void mixer_reset (AC97LinkState *s)
519 {
520     uint8_t active[LAST_INDEX];
521 
522     dolog ("mixer_reset\n");
523     memset (s->mixer_data, 0, sizeof (s->mixer_data));
524     memset (active, 0, sizeof (active));
525     mixer_store (s, AC97_Reset                   , 0x0000); /* 6940 */
526     mixer_store (s, AC97_Headphone_Volume_Mute   , 0x0000);
527     mixer_store (s, AC97_Master_Volume_Mono_Mute , 0x0000);
528     mixer_store (s, AC97_Master_Tone_RL,           0x0000);
529     mixer_store (s, AC97_PC_BEEP_Volume_Mute     , 0x0000);
530     mixer_store (s, AC97_Phone_Volume_Mute       , 0x0000);
531     mixer_store (s, AC97_Mic_Volume_Mute         , 0x0000);
532     mixer_store (s, AC97_Line_In_Volume_Mute     , 0x0000);
533     mixer_store (s, AC97_CD_Volume_Mute          , 0x0000);
534     mixer_store (s, AC97_Video_Volume_Mute       , 0x0000);
535     mixer_store (s, AC97_Aux_Volume_Mute         , 0x0000);
536     mixer_store (s, AC97_Record_Gain_Mic_Mute    , 0x0000);
537     mixer_store (s, AC97_General_Purpose         , 0x0000);
538     mixer_store (s, AC97_3D_Control              , 0x0000);
539     mixer_store (s, AC97_Powerdown_Ctrl_Stat     , 0x000f);
540 
541     /*
542      * Sigmatel 9700 (STAC9700)
543      */
544     mixer_store (s, AC97_Vendor_ID1              , 0x8384);
545     mixer_store (s, AC97_Vendor_ID2              , 0x7600); /* 7608 */
546 
547     mixer_store (s, AC97_Extended_Audio_ID       , 0x0809);
548     mixer_store (s, AC97_Extended_Audio_Ctrl_Stat, 0x0009);
549     mixer_store (s, AC97_PCM_Front_DAC_Rate      , 0xbb80);
550     mixer_store (s, AC97_PCM_Surround_DAC_Rate   , 0xbb80);
551     mixer_store (s, AC97_PCM_LFE_DAC_Rate        , 0xbb80);
552     mixer_store (s, AC97_PCM_LR_ADC_Rate         , 0xbb80);
553     mixer_store (s, AC97_MIC_ADC_Rate            , 0xbb80);
554 
555     record_select (s, 0);
556     set_volume (s, AC97_Master_Volume_Mute, 0x8000);
557     set_volume (s, AC97_PCM_Out_Volume_Mute, 0x8808);
558     set_volume (s, AC97_Record_Gain_Mute, 0x8808);
559 
560     reset_voices (s, active);
561 }
562 
563 /**
564  * Native audio mixer
565  * I/O Reads
566  */
567 static uint32_t nam_readb (void *opaque, uint32_t addr)
568 {
569     AC97LinkState *s = opaque;
570     dolog ("U nam readb %#x\n", addr);
571     s->cas = 0;
572     return ~0U;
573 }
574 
575 static uint32_t nam_readw (void *opaque, uint32_t addr)
576 {
577     AC97LinkState *s = opaque;
578     uint32_t index = addr;
579     s->cas = 0;
580     return mixer_load(s, index);
581 }
582 
583 static uint32_t nam_readl (void *opaque, uint32_t addr)
584 {
585     AC97LinkState *s = opaque;
586     dolog ("U nam readl %#x\n", addr);
587     s->cas = 0;
588     return ~0U;
589 }
590 
591 /**
592  * Native audio mixer
593  * I/O Writes
594  */
595 static void nam_writeb (void *opaque, uint32_t addr, uint32_t val)
596 {
597     AC97LinkState *s = opaque;
598     dolog ("U nam writeb %#x <- %#x\n", addr, val);
599     s->cas = 0;
600 }
601 
602 static void nam_writew (void *opaque, uint32_t addr, uint32_t val)
603 {
604     AC97LinkState *s = opaque;
605     uint32_t index = addr;
606     s->cas = 0;
607     switch (index) {
608     case AC97_Reset:
609         mixer_reset (s);
610         break;
611     case AC97_Powerdown_Ctrl_Stat:
612         val &= ~0x800f;
613         val |= mixer_load (s, index) & 0xf;
614         mixer_store (s, index, val);
615         break;
616     case AC97_PCM_Out_Volume_Mute:
617     case AC97_Master_Volume_Mute:
618     case AC97_Record_Gain_Mute:
619         set_volume (s, index, val);
620         break;
621     case AC97_Record_Select:
622         record_select (s, val);
623         break;
624     case AC97_Vendor_ID1:
625     case AC97_Vendor_ID2:
626         dolog ("Attempt to write vendor ID to %#x\n", val);
627         break;
628     case AC97_Extended_Audio_ID:
629         dolog ("Attempt to write extended audio ID to %#x\n", val);
630         break;
631     case AC97_Extended_Audio_Ctrl_Stat:
632         if (!(val & EACS_VRA)) {
633             mixer_store (s, AC97_PCM_Front_DAC_Rate, 0xbb80);
634             mixer_store (s, AC97_PCM_LR_ADC_Rate,    0xbb80);
635             open_voice (s, PI_INDEX, 48000);
636             open_voice (s, PO_INDEX, 48000);
637         }
638         if (!(val & EACS_VRM)) {
639             mixer_store (s, AC97_MIC_ADC_Rate, 0xbb80);
640             open_voice (s, MC_INDEX, 48000);
641         }
642         dolog ("Setting extended audio control to %#x\n", val);
643         mixer_store (s, AC97_Extended_Audio_Ctrl_Stat, val);
644         break;
645     case AC97_PCM_Front_DAC_Rate:
646         if (mixer_load (s, AC97_Extended_Audio_Ctrl_Stat) & EACS_VRA) {
647             mixer_store (s, index, val);
648             dolog ("Set front DAC rate to %d\n", val);
649             open_voice (s, PO_INDEX, val);
650         }
651         else {
652             dolog ("Attempt to set front DAC rate to %d, "
653                    "but VRA is not set\n",
654                    val);
655         }
656         break;
657     case AC97_MIC_ADC_Rate:
658         if (mixer_load (s, AC97_Extended_Audio_Ctrl_Stat) & EACS_VRM) {
659             mixer_store (s, index, val);
660             dolog ("Set MIC ADC rate to %d\n", val);
661             open_voice (s, MC_INDEX, val);
662         }
663         else {
664             dolog ("Attempt to set MIC ADC rate to %d, "
665                    "but VRM is not set\n",
666                    val);
667         }
668         break;
669     case AC97_PCM_LR_ADC_Rate:
670         if (mixer_load (s, AC97_Extended_Audio_Ctrl_Stat) & EACS_VRA) {
671             mixer_store (s, index, val);
672             dolog ("Set front LR ADC rate to %d\n", val);
673             open_voice (s, PI_INDEX, val);
674         }
675         else {
676             dolog ("Attempt to set LR ADC rate to %d, but VRA is not set\n",
677                     val);
678         }
679         break;
680     case AC97_Headphone_Volume_Mute:
681     case AC97_Master_Volume_Mono_Mute:
682     case AC97_Master_Tone_RL:
683     case AC97_PC_BEEP_Volume_Mute:
684     case AC97_Phone_Volume_Mute:
685     case AC97_Mic_Volume_Mute:
686     case AC97_Line_In_Volume_Mute:
687     case AC97_CD_Volume_Mute:
688     case AC97_Video_Volume_Mute:
689     case AC97_Aux_Volume_Mute:
690     case AC97_Record_Gain_Mic_Mute:
691     case AC97_General_Purpose:
692     case AC97_3D_Control:
693     case AC97_Sigmatel_Analog:
694     case AC97_Sigmatel_Dac2Invert:
695         /* None of the features in these regs are emulated, so they are RO */
696         break;
697     default:
698         dolog ("U nam writew %#x <- %#x\n", addr, val);
699         mixer_store (s, index, val);
700         break;
701     }
702 }
703 
704 static void nam_writel (void *opaque, uint32_t addr, uint32_t val)
705 {
706     AC97LinkState *s = opaque;
707     dolog ("U nam writel %#x <- %#x\n", addr, val);
708     s->cas = 0;
709 }
710 
711 /**
712  * Native audio bus master
713  * I/O Reads
714  */
715 static uint32_t nabm_readb (void *opaque, uint32_t addr)
716 {
717     AC97LinkState *s = opaque;
718     AC97BusMasterRegs *r = NULL;
719     uint32_t index = addr;
720     uint32_t val = ~0U;
721 
722     switch (index) {
723     case CAS:
724         dolog ("CAS %d\n", s->cas);
725         val = s->cas;
726         s->cas = 1;
727         break;
728     case PI_CIV:
729     case PO_CIV:
730     case MC_CIV:
731         r = &s->bm_regs[GET_BM (index)];
732         val = r->civ;
733         dolog ("CIV[%d] -> %#x\n", GET_BM (index), val);
734         break;
735     case PI_LVI:
736     case PO_LVI:
737     case MC_LVI:
738         r = &s->bm_regs[GET_BM (index)];
739         val = r->lvi;
740         dolog ("LVI[%d] -> %#x\n", GET_BM (index), val);
741         break;
742     case PI_PIV:
743     case PO_PIV:
744     case MC_PIV:
745         r = &s->bm_regs[GET_BM (index)];
746         val = r->piv;
747         dolog ("PIV[%d] -> %#x\n", GET_BM (index), val);
748         break;
749     case PI_CR:
750     case PO_CR:
751     case MC_CR:
752         r = &s->bm_regs[GET_BM (index)];
753         val = r->cr;
754         dolog ("CR[%d] -> %#x\n", GET_BM (index), val);
755         break;
756     case PI_SR:
757     case PO_SR:
758     case MC_SR:
759         r = &s->bm_regs[GET_BM (index)];
760         val = r->sr & 0xff;
761         dolog ("SRb[%d] -> %#x\n", GET_BM (index), val);
762         break;
763     default:
764         dolog ("U nabm readb %#x -> %#x\n", addr, val);
765         break;
766     }
767     return val;
768 }
769 
770 static uint32_t nabm_readw (void *opaque, uint32_t addr)
771 {
772     AC97LinkState *s = opaque;
773     AC97BusMasterRegs *r = NULL;
774     uint32_t index = addr;
775     uint32_t val = ~0U;
776 
777     switch (index) {
778     case PI_SR:
779     case PO_SR:
780     case MC_SR:
781         r = &s->bm_regs[GET_BM (index)];
782         val = r->sr;
783         dolog ("SR[%d] -> %#x\n", GET_BM (index), val);
784         break;
785     case PI_PICB:
786     case PO_PICB:
787     case MC_PICB:
788         r = &s->bm_regs[GET_BM (index)];
789         val = r->picb;
790         dolog ("PICB[%d] -> %#x\n", GET_BM (index), val);
791         break;
792     default:
793         dolog ("U nabm readw %#x -> %#x\n", addr, val);
794         break;
795     }
796     return val;
797 }
798 
799 static uint32_t nabm_readl (void *opaque, uint32_t addr)
800 {
801     AC97LinkState *s = opaque;
802     AC97BusMasterRegs *r = NULL;
803     uint32_t index = addr;
804     uint32_t val = ~0U;
805 
806     switch (index) {
807     case PI_BDBAR:
808     case PO_BDBAR:
809     case MC_BDBAR:
810         r = &s->bm_regs[GET_BM (index)];
811         val = r->bdbar;
812         dolog ("BMADDR[%d] -> %#x\n", GET_BM (index), val);
813         break;
814     case PI_CIV:
815     case PO_CIV:
816     case MC_CIV:
817         r = &s->bm_regs[GET_BM (index)];
818         val = r->civ | (r->lvi << 8) | (r->sr << 16);
819         dolog ("CIV LVI SR[%d] -> %#x, %#x, %#x\n", GET_BM (index),
820                r->civ, r->lvi, r->sr);
821         break;
822     case PI_PICB:
823     case PO_PICB:
824     case MC_PICB:
825         r = &s->bm_regs[GET_BM (index)];
826         val = r->picb | (r->piv << 16) | (r->cr << 24);
827         dolog ("PICB PIV CR[%d] -> %#x %#x %#x %#x\n", GET_BM (index),
828                val, r->picb, r->piv, r->cr);
829         break;
830     case GLOB_CNT:
831         val = s->glob_cnt;
832         dolog ("glob_cnt -> %#x\n", val);
833         break;
834     case GLOB_STA:
835         val = s->glob_sta | GS_S0CR;
836         dolog ("glob_sta -> %#x\n", val);
837         break;
838     default:
839         dolog ("U nabm readl %#x -> %#x\n", addr, val);
840         break;
841     }
842     return val;
843 }
844 
845 /**
846  * Native audio bus master
847  * I/O Writes
848  */
849 static void nabm_writeb (void *opaque, uint32_t addr, uint32_t val)
850 {
851     AC97LinkState *s = opaque;
852     AC97BusMasterRegs *r = NULL;
853     uint32_t index = addr;
854     switch (index) {
855     case PI_LVI:
856     case PO_LVI:
857     case MC_LVI:
858         r = &s->bm_regs[GET_BM (index)];
859         if ((r->cr & CR_RPBM) && (r->sr & SR_DCH)) {
860             r->sr &= ~(SR_DCH | SR_CELV);
861             r->civ = r->piv;
862             r->piv = (r->piv + 1) % 32;
863             fetch_bd (s, r);
864         }
865         r->lvi = val % 32;
866         dolog ("LVI[%d] <- %#x\n", GET_BM (index), val);
867         break;
868     case PI_CR:
869     case PO_CR:
870     case MC_CR:
871         r = &s->bm_regs[GET_BM (index)];
872         if (val & CR_RR) {
873             reset_bm_regs (s, r);
874         }
875         else {
876             r->cr = val & CR_VALID_MASK;
877             if (!(r->cr & CR_RPBM)) {
878                 voice_set_active (s, r - s->bm_regs, 0);
879                 r->sr |= SR_DCH;
880             }
881             else {
882                 r->civ = r->piv;
883                 r->piv = (r->piv + 1) % 32;
884                 fetch_bd (s, r);
885                 r->sr &= ~SR_DCH;
886                 voice_set_active (s, r - s->bm_regs, 1);
887             }
888         }
889         dolog ("CR[%d] <- %#x (cr %#x)\n", GET_BM (index), val, r->cr);
890         break;
891     case PI_SR:
892     case PO_SR:
893     case MC_SR:
894         r = &s->bm_regs[GET_BM (index)];
895         r->sr |= val & ~(SR_RO_MASK | SR_WCLEAR_MASK);
896         update_sr (s, r, r->sr & ~(val & SR_WCLEAR_MASK));
897         dolog ("SR[%d] <- %#x (sr %#x)\n", GET_BM (index), val, r->sr);
898         break;
899     default:
900         dolog ("U nabm writeb %#x <- %#x\n", addr, val);
901         break;
902     }
903 }
904 
905 static void nabm_writew (void *opaque, uint32_t addr, uint32_t val)
906 {
907     AC97LinkState *s = opaque;
908     AC97BusMasterRegs *r = NULL;
909     uint32_t index = addr;
910     switch (index) {
911     case PI_SR:
912     case PO_SR:
913     case MC_SR:
914         r = &s->bm_regs[GET_BM (index)];
915         r->sr |= val & ~(SR_RO_MASK | SR_WCLEAR_MASK);
916         update_sr (s, r, r->sr & ~(val & SR_WCLEAR_MASK));
917         dolog ("SR[%d] <- %#x (sr %#x)\n", GET_BM (index), val, r->sr);
918         break;
919     default:
920         dolog ("U nabm writew %#x <- %#x\n", addr, val);
921         break;
922     }
923 }
924 
925 static void nabm_writel (void *opaque, uint32_t addr, uint32_t val)
926 {
927     AC97LinkState *s = opaque;
928     AC97BusMasterRegs *r = NULL;
929     uint32_t index = addr;
930     switch (index) {
931     case PI_BDBAR:
932     case PO_BDBAR:
933     case MC_BDBAR:
934         r = &s->bm_regs[GET_BM (index)];
935         r->bdbar = val & ~3;
936         dolog ("BDBAR[%d] <- %#x (bdbar %#x)\n",
937                GET_BM (index), val, r->bdbar);
938         break;
939     case GLOB_CNT:
940         if (val & GC_WR)
941             warm_reset (s);
942         if (val & GC_CR)
943             cold_reset (s);
944         if (!(val & (GC_WR | GC_CR)))
945             s->glob_cnt = val & GC_VALID_MASK;
946         dolog ("glob_cnt <- %#x (glob_cnt %#x)\n", val, s->glob_cnt);
947         break;
948     case GLOB_STA:
949         s->glob_sta &= ~(val & GS_WCLEAR_MASK);
950         s->glob_sta |= (val & ~(GS_WCLEAR_MASK | GS_RO_MASK)) & GS_VALID_MASK;
951         dolog ("glob_sta <- %#x (glob_sta %#x)\n", val, s->glob_sta);
952         break;
953     default:
954         dolog ("U nabm writel %#x <- %#x\n", addr, val);
955         break;
956     }
957 }
958 
959 static int write_audio (AC97LinkState *s, AC97BusMasterRegs *r,
960                         int max, int *stop)
961 {
962     uint8_t tmpbuf[4096];
963     uint32_t addr = r->bd.addr;
964     uint32_t temp = r->picb << 1;
965     uint32_t written = 0;
966     int to_copy = 0;
967     temp = MIN (temp, max);
968 
969     if (!temp) {
970         *stop = 1;
971         return 0;
972     }
973 
974     while (temp) {
975         int copied;
976         to_copy = MIN (temp, sizeof (tmpbuf));
977         pci_dma_read (&s->dev, addr, tmpbuf, to_copy);
978         copied = AUD_write (s->voice_po, tmpbuf, to_copy);
979         dolog ("write_audio max=%x to_copy=%x copied=%x\n",
980                max, to_copy, copied);
981         if (!copied) {
982             *stop = 1;
983             break;
984         }
985         temp -= copied;
986         addr += copied;
987         written += copied;
988     }
989 
990     if (!temp) {
991         if (to_copy < 4) {
992             dolog ("whoops\n");
993             s->last_samp = 0;
994         }
995         else {
996             s->last_samp = *(uint32_t *) &tmpbuf[to_copy - 4];
997         }
998     }
999 
1000     r->bd.addr = addr;
1001     return written;
1002 }
1003 
1004 static void write_bup (AC97LinkState *s, int elapsed)
1005 {
1006     dolog ("write_bup\n");
1007     if (!(s->bup_flag & BUP_SET)) {
1008         if (s->bup_flag & BUP_LAST) {
1009             int i;
1010             uint8_t *p = s->silence;
1011             for (i = 0; i < sizeof (s->silence) / 4; i++, p += 4) {
1012                 *(uint32_t *) p = s->last_samp;
1013             }
1014         }
1015         else {
1016             memset (s->silence, 0, sizeof (s->silence));
1017         }
1018         s->bup_flag |= BUP_SET;
1019     }
1020 
1021     while (elapsed) {
1022         int temp = MIN (elapsed, sizeof (s->silence));
1023         while (temp) {
1024             int copied = AUD_write (s->voice_po, s->silence, temp);
1025             if (!copied)
1026                 return;
1027             temp -= copied;
1028             elapsed -= copied;
1029         }
1030     }
1031 }
1032 
1033 static int read_audio (AC97LinkState *s, AC97BusMasterRegs *r,
1034                        int max, int *stop)
1035 {
1036     uint8_t tmpbuf[4096];
1037     uint32_t addr = r->bd.addr;
1038     uint32_t temp = r->picb << 1;
1039     uint32_t nread = 0;
1040     int to_copy = 0;
1041     SWVoiceIn *voice = (r - s->bm_regs) == MC_INDEX ? s->voice_mc : s->voice_pi;
1042 
1043     temp = MIN (temp, max);
1044 
1045     if (!temp) {
1046         *stop = 1;
1047         return 0;
1048     }
1049 
1050     while (temp) {
1051         int acquired;
1052         to_copy = MIN (temp, sizeof (tmpbuf));
1053         acquired = AUD_read (voice, tmpbuf, to_copy);
1054         if (!acquired) {
1055             *stop = 1;
1056             break;
1057         }
1058         pci_dma_write (&s->dev, addr, tmpbuf, acquired);
1059         temp -= acquired;
1060         addr += acquired;
1061         nread += acquired;
1062     }
1063 
1064     r->bd.addr = addr;
1065     return nread;
1066 }
1067 
1068 static void transfer_audio (AC97LinkState *s, int index, int elapsed)
1069 {
1070     AC97BusMasterRegs *r = &s->bm_regs[index];
1071     int stop = 0;
1072 
1073     if (s->invalid_freq[index]) {
1074         AUD_log ("ac97", "attempt to use voice %d with invalid frequency %d\n",
1075                  index, s->invalid_freq[index]);
1076         return;
1077     }
1078 
1079     if (r->sr & SR_DCH) {
1080         if (r->cr & CR_RPBM) {
1081             switch (index) {
1082             case PO_INDEX:
1083                 write_bup (s, elapsed);
1084                 break;
1085             }
1086         }
1087         return;
1088     }
1089 
1090     while ((elapsed >> 1) && !stop) {
1091         int temp;
1092 
1093         if (!r->bd_valid) {
1094             dolog ("invalid bd\n");
1095             fetch_bd (s, r);
1096         }
1097 
1098         if (!r->picb) {
1099             dolog ("fresh bd %d is empty %#x %#x\n",
1100                    r->civ, r->bd.addr, r->bd.ctl_len);
1101             if (r->civ == r->lvi) {
1102                 r->sr |= SR_DCH; /* CELV? */
1103                 s->bup_flag = 0;
1104                 break;
1105             }
1106             r->sr &= ~SR_CELV;
1107             r->civ = r->piv;
1108             r->piv = (r->piv + 1) % 32;
1109             fetch_bd (s, r);
1110             return;
1111         }
1112 
1113         switch (index) {
1114         case PO_INDEX:
1115             temp = write_audio (s, r, elapsed, &stop);
1116             elapsed -= temp;
1117             r->picb -= (temp >> 1);
1118             break;
1119 
1120         case PI_INDEX:
1121         case MC_INDEX:
1122             temp = read_audio (s, r, elapsed, &stop);
1123             elapsed -= temp;
1124             r->picb -= (temp >> 1);
1125             break;
1126         }
1127 
1128         if (!r->picb) {
1129             uint32_t new_sr = r->sr & ~SR_CELV;
1130 
1131             if (r->bd.ctl_len & BD_IOC) {
1132                 new_sr |= SR_BCIS;
1133             }
1134 
1135             if (r->civ == r->lvi) {
1136                 dolog ("Underrun civ (%d) == lvi (%d)\n", r->civ, r->lvi);
1137 
1138                 new_sr |= SR_LVBCI | SR_DCH | SR_CELV;
1139                 stop = 1;
1140                 s->bup_flag = (r->bd.ctl_len & BD_BUP) ? BUP_LAST : 0;
1141             }
1142             else {
1143                 r->civ = r->piv;
1144                 r->piv = (r->piv + 1) % 32;
1145                 fetch_bd (s, r);
1146             }
1147 
1148             update_sr (s, r, new_sr);
1149         }
1150     }
1151 }
1152 
1153 static void pi_callback (void *opaque, int avail)
1154 {
1155     transfer_audio (opaque, PI_INDEX, avail);
1156 }
1157 
1158 static void mc_callback (void *opaque, int avail)
1159 {
1160     transfer_audio (opaque, MC_INDEX, avail);
1161 }
1162 
1163 static void po_callback (void *opaque, int free)
1164 {
1165     transfer_audio (opaque, PO_INDEX, free);
1166 }
1167 
1168 static const VMStateDescription vmstate_ac97_bm_regs = {
1169     .name = "ac97_bm_regs",
1170     .version_id = 1,
1171     .minimum_version_id = 1,
1172     .fields = (VMStateField[]) {
1173         VMSTATE_UINT32 (bdbar, AC97BusMasterRegs),
1174         VMSTATE_UINT8 (civ, AC97BusMasterRegs),
1175         VMSTATE_UINT8 (lvi, AC97BusMasterRegs),
1176         VMSTATE_UINT16 (sr, AC97BusMasterRegs),
1177         VMSTATE_UINT16 (picb, AC97BusMasterRegs),
1178         VMSTATE_UINT8 (piv, AC97BusMasterRegs),
1179         VMSTATE_UINT8 (cr, AC97BusMasterRegs),
1180         VMSTATE_UINT32 (bd_valid, AC97BusMasterRegs),
1181         VMSTATE_UINT32 (bd.addr, AC97BusMasterRegs),
1182         VMSTATE_UINT32 (bd.ctl_len, AC97BusMasterRegs),
1183         VMSTATE_END_OF_LIST ()
1184     }
1185 };
1186 
1187 static int ac97_post_load (void *opaque, int version_id)
1188 {
1189     uint8_t active[LAST_INDEX];
1190     AC97LinkState *s = opaque;
1191 
1192     record_select (s, mixer_load (s, AC97_Record_Select));
1193     set_volume (s, AC97_Master_Volume_Mute,
1194                 mixer_load (s, AC97_Master_Volume_Mute));
1195     set_volume (s, AC97_PCM_Out_Volume_Mute,
1196                 mixer_load (s, AC97_PCM_Out_Volume_Mute));
1197     set_volume (s, AC97_Record_Gain_Mute,
1198                 mixer_load (s, AC97_Record_Gain_Mute));
1199 
1200     active[PI_INDEX] = !!(s->bm_regs[PI_INDEX].cr & CR_RPBM);
1201     active[PO_INDEX] = !!(s->bm_regs[PO_INDEX].cr & CR_RPBM);
1202     active[MC_INDEX] = !!(s->bm_regs[MC_INDEX].cr & CR_RPBM);
1203     reset_voices (s, active);
1204 
1205     s->bup_flag = 0;
1206     s->last_samp = 0;
1207     return 0;
1208 }
1209 
1210 static bool is_version_2 (void *opaque, int version_id)
1211 {
1212     return version_id == 2;
1213 }
1214 
1215 static const VMStateDescription vmstate_ac97 = {
1216     .name = "ac97",
1217     .version_id = 3,
1218     .minimum_version_id = 2,
1219     .post_load = ac97_post_load,
1220     .fields = (VMStateField[]) {
1221         VMSTATE_PCI_DEVICE (dev, AC97LinkState),
1222         VMSTATE_UINT32 (glob_cnt, AC97LinkState),
1223         VMSTATE_UINT32 (glob_sta, AC97LinkState),
1224         VMSTATE_UINT32 (cas, AC97LinkState),
1225         VMSTATE_STRUCT_ARRAY (bm_regs, AC97LinkState, 3, 1,
1226                               vmstate_ac97_bm_regs, AC97BusMasterRegs),
1227         VMSTATE_BUFFER (mixer_data, AC97LinkState),
1228         VMSTATE_UNUSED_TEST (is_version_2, 3),
1229         VMSTATE_END_OF_LIST ()
1230     }
1231 };
1232 
1233 static uint64_t nam_read(void *opaque, hwaddr addr, unsigned size)
1234 {
1235     if ((addr / size) > 256) {
1236         return -1;
1237     }
1238 
1239     switch (size) {
1240     case 1:
1241         return nam_readb(opaque, addr);
1242     case 2:
1243         return nam_readw(opaque, addr);
1244     case 4:
1245         return nam_readl(opaque, addr);
1246     default:
1247         return -1;
1248     }
1249 }
1250 
1251 static void nam_write(void *opaque, hwaddr addr, uint64_t val,
1252                       unsigned size)
1253 {
1254     if ((addr / size) > 256) {
1255         return;
1256     }
1257 
1258     switch (size) {
1259     case 1:
1260         nam_writeb(opaque, addr, val);
1261         break;
1262     case 2:
1263         nam_writew(opaque, addr, val);
1264         break;
1265     case 4:
1266         nam_writel(opaque, addr, val);
1267         break;
1268     }
1269 }
1270 
1271 static const MemoryRegionOps ac97_io_nam_ops = {
1272     .read = nam_read,
1273     .write = nam_write,
1274     .impl = {
1275         .min_access_size = 1,
1276         .max_access_size = 4,
1277     },
1278     .endianness = DEVICE_LITTLE_ENDIAN,
1279 };
1280 
1281 static uint64_t nabm_read(void *opaque, hwaddr addr, unsigned size)
1282 {
1283     if ((addr / size) > 64) {
1284         return -1;
1285     }
1286 
1287     switch (size) {
1288     case 1:
1289         return nabm_readb(opaque, addr);
1290     case 2:
1291         return nabm_readw(opaque, addr);
1292     case 4:
1293         return nabm_readl(opaque, addr);
1294     default:
1295         return -1;
1296     }
1297 }
1298 
1299 static void nabm_write(void *opaque, hwaddr addr, uint64_t val,
1300                       unsigned size)
1301 {
1302     if ((addr / size) > 64) {
1303         return;
1304     }
1305 
1306     switch (size) {
1307     case 1:
1308         nabm_writeb(opaque, addr, val);
1309         break;
1310     case 2:
1311         nabm_writew(opaque, addr, val);
1312         break;
1313     case 4:
1314         nabm_writel(opaque, addr, val);
1315         break;
1316     }
1317 }
1318 
1319 
1320 static const MemoryRegionOps ac97_io_nabm_ops = {
1321     .read = nabm_read,
1322     .write = nabm_write,
1323     .impl = {
1324         .min_access_size = 1,
1325         .max_access_size = 4,
1326     },
1327     .endianness = DEVICE_LITTLE_ENDIAN,
1328 };
1329 
1330 static void ac97_on_reset (DeviceState *dev)
1331 {
1332     AC97LinkState *s = container_of(dev, AC97LinkState, dev.qdev);
1333 
1334     reset_bm_regs (s, &s->bm_regs[0]);
1335     reset_bm_regs (s, &s->bm_regs[1]);
1336     reset_bm_regs (s, &s->bm_regs[2]);
1337 
1338     /*
1339      * Reset the mixer too. The Windows XP driver seems to rely on
1340      * this. At least it wants to read the vendor id before it resets
1341      * the codec manually.
1342      */
1343     mixer_reset (s);
1344 }
1345 
1346 static void ac97_realize(PCIDevice *dev, Error **errp)
1347 {
1348     AC97LinkState *s = AC97(dev);
1349     uint8_t *c = s->dev.config;
1350 
1351     /* TODO: no need to override */
1352     c[PCI_COMMAND] = 0x00;      /* pcicmd pci command rw, ro */
1353     c[PCI_COMMAND + 1] = 0x00;
1354 
1355     /* TODO: */
1356     c[PCI_STATUS] = PCI_STATUS_FAST_BACK;      /* pcists pci status rwc, ro */
1357     c[PCI_STATUS + 1] = PCI_STATUS_DEVSEL_MEDIUM >> 8;
1358 
1359     c[PCI_CLASS_PROG] = 0x00;      /* pi programming interface ro */
1360 
1361     /* TODO set when bar is registered. no need to override. */
1362     /* nabmar native audio mixer base address rw */
1363     c[PCI_BASE_ADDRESS_0] = PCI_BASE_ADDRESS_SPACE_IO;
1364     c[PCI_BASE_ADDRESS_0 + 1] = 0x00;
1365     c[PCI_BASE_ADDRESS_0 + 2] = 0x00;
1366     c[PCI_BASE_ADDRESS_0 + 3] = 0x00;
1367 
1368     /* TODO set when bar is registered. no need to override. */
1369       /* nabmbar native audio bus mastering base address rw */
1370     c[PCI_BASE_ADDRESS_0 + 4] = PCI_BASE_ADDRESS_SPACE_IO;
1371     c[PCI_BASE_ADDRESS_0 + 5] = 0x00;
1372     c[PCI_BASE_ADDRESS_0 + 6] = 0x00;
1373     c[PCI_BASE_ADDRESS_0 + 7] = 0x00;
1374 
1375     c[PCI_INTERRUPT_LINE] = 0x00;      /* intr_ln interrupt line rw */
1376     c[PCI_INTERRUPT_PIN] = 0x01;      /* intr_pn interrupt pin ro */
1377 
1378     memory_region_init_io (&s->io_nam, OBJECT(s), &ac97_io_nam_ops, s,
1379                            "ac97-nam", 1024);
1380     memory_region_init_io (&s->io_nabm, OBJECT(s), &ac97_io_nabm_ops, s,
1381                            "ac97-nabm", 256);
1382     pci_register_bar (&s->dev, 0, PCI_BASE_ADDRESS_SPACE_IO, &s->io_nam);
1383     pci_register_bar (&s->dev, 1, PCI_BASE_ADDRESS_SPACE_IO, &s->io_nabm);
1384     AUD_register_card ("ac97", &s->card);
1385     ac97_on_reset(DEVICE(s));
1386 }
1387 
1388 static void ac97_exit(PCIDevice *dev)
1389 {
1390     AC97LinkState *s = AC97(dev);
1391 
1392     AUD_close_in(&s->card, s->voice_pi);
1393     AUD_close_out(&s->card, s->voice_po);
1394     AUD_close_in(&s->card, s->voice_mc);
1395     AUD_remove_card(&s->card);
1396 }
1397 
1398 static Property ac97_properties[] = {
1399     DEFINE_AUDIO_PROPERTIES(AC97LinkState, card),
1400     DEFINE_PROP_END_OF_LIST (),
1401 };
1402 
1403 static void ac97_class_init (ObjectClass *klass, void *data)
1404 {
1405     DeviceClass *dc = DEVICE_CLASS (klass);
1406     PCIDeviceClass *k = PCI_DEVICE_CLASS (klass);
1407 
1408     k->realize = ac97_realize;
1409     k->exit = ac97_exit;
1410     k->vendor_id = PCI_VENDOR_ID_INTEL;
1411     k->device_id = PCI_DEVICE_ID_INTEL_82801AA_5;
1412     k->revision = 0x01;
1413     k->class_id = PCI_CLASS_MULTIMEDIA_AUDIO;
1414     set_bit(DEVICE_CATEGORY_SOUND, dc->categories);
1415     dc->desc = "Intel 82801AA AC97 Audio";
1416     dc->vmsd = &vmstate_ac97;
1417     device_class_set_props(dc, ac97_properties);
1418     dc->reset = ac97_on_reset;
1419 }
1420 
1421 static const TypeInfo ac97_info = {
1422     .name          = TYPE_AC97,
1423     .parent        = TYPE_PCI_DEVICE,
1424     .instance_size = sizeof (AC97LinkState),
1425     .class_init    = ac97_class_init,
1426     .interfaces = (InterfaceInfo[]) {
1427         { INTERFACE_CONVENTIONAL_PCI_DEVICE },
1428         { },
1429     },
1430 };
1431 
1432 static void ac97_register_types (void)
1433 {
1434     type_register_static (&ac97_info);
1435     deprecated_register_soundhw("ac97", "Intel 82801AA AC97 Audio",
1436                                 0, TYPE_AC97);
1437 }
1438 
1439 type_init (ac97_register_types)
1440