xref: /openbmc/qemu/hw/audio/ac97.c (revision 709395f8)
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/hw.h"
22 #include "hw/audio/soundhw.h"
23 #include "audio/audio.h"
24 #include "hw/pci/pci.h"
25 #include "sysemu/dma.h"
26 
27 enum {
28     AC97_Reset                     = 0x00,
29     AC97_Master_Volume_Mute        = 0x02,
30     AC97_Headphone_Volume_Mute     = 0x04,
31     AC97_Master_Volume_Mono_Mute   = 0x06,
32     AC97_Master_Tone_RL            = 0x08,
33     AC97_PC_BEEP_Volume_Mute       = 0x0A,
34     AC97_Phone_Volume_Mute         = 0x0C,
35     AC97_Mic_Volume_Mute           = 0x0E,
36     AC97_Line_In_Volume_Mute       = 0x10,
37     AC97_CD_Volume_Mute            = 0x12,
38     AC97_Video_Volume_Mute         = 0x14,
39     AC97_Aux_Volume_Mute           = 0x16,
40     AC97_PCM_Out_Volume_Mute       = 0x18,
41     AC97_Record_Select             = 0x1A,
42     AC97_Record_Gain_Mute          = 0x1C,
43     AC97_Record_Gain_Mic_Mute      = 0x1E,
44     AC97_General_Purpose           = 0x20,
45     AC97_3D_Control                = 0x22,
46     AC97_AC_97_RESERVED            = 0x24,
47     AC97_Powerdown_Ctrl_Stat       = 0x26,
48     AC97_Extended_Audio_ID         = 0x28,
49     AC97_Extended_Audio_Ctrl_Stat  = 0x2A,
50     AC97_PCM_Front_DAC_Rate        = 0x2C,
51     AC97_PCM_Surround_DAC_Rate     = 0x2E,
52     AC97_PCM_LFE_DAC_Rate          = 0x30,
53     AC97_PCM_LR_ADC_Rate           = 0x32,
54     AC97_MIC_ADC_Rate              = 0x34,
55     AC97_6Ch_Vol_C_LFE_Mute        = 0x36,
56     AC97_6Ch_Vol_L_R_Surround_Mute = 0x38,
57     AC97_Vendor_Reserved           = 0x58,
58     AC97_Sigmatel_Analog           = 0x6c, /* We emulate a Sigmatel codec */
59     AC97_Sigmatel_Dac2Invert       = 0x6e, /* We emulate a Sigmatel codec */
60     AC97_Vendor_ID1                = 0x7c,
61     AC97_Vendor_ID2                = 0x7e
62 };
63 
64 #define SOFT_VOLUME
65 #define SR_FIFOE 16             /* rwc */
66 #define SR_BCIS  8              /* rwc */
67 #define SR_LVBCI 4              /* rwc */
68 #define SR_CELV  2              /* ro */
69 #define SR_DCH   1              /* ro */
70 #define SR_VALID_MASK ((1 << 5) - 1)
71 #define SR_WCLEAR_MASK (SR_FIFOE | SR_BCIS | SR_LVBCI)
72 #define SR_RO_MASK (SR_DCH | SR_CELV)
73 #define SR_INT_MASK (SR_FIFOE | SR_BCIS | SR_LVBCI)
74 
75 #define CR_IOCE  16             /* rw */
76 #define CR_FEIE  8              /* rw */
77 #define CR_LVBIE 4              /* rw */
78 #define CR_RR    2              /* rw */
79 #define CR_RPBM  1              /* rw */
80 #define CR_VALID_MASK ((1 << 5) - 1)
81 #define CR_DONT_CLEAR_MASK (CR_IOCE | CR_FEIE | CR_LVBIE)
82 
83 #define GC_WR    4              /* rw */
84 #define GC_CR    2              /* rw */
85 #define GC_VALID_MASK ((1 << 6) - 1)
86 
87 #define GS_MD3   (1<<17)        /* rw */
88 #define GS_AD3   (1<<16)        /* rw */
89 #define GS_RCS   (1<<15)        /* rwc */
90 #define GS_B3S12 (1<<14)        /* ro */
91 #define GS_B2S12 (1<<13)        /* ro */
92 #define GS_B1S12 (1<<12)        /* ro */
93 #define GS_S1R1  (1<<11)        /* rwc */
94 #define GS_S0R1  (1<<10)        /* rwc */
95 #define GS_S1CR  (1<<9)         /* ro */
96 #define GS_S0CR  (1<<8)         /* ro */
97 #define GS_MINT  (1<<7)         /* ro */
98 #define GS_POINT (1<<6)         /* ro */
99 #define GS_PIINT (1<<5)         /* ro */
100 #define GS_RSRVD ((1<<4)|(1<<3))
101 #define GS_MOINT (1<<2)         /* ro */
102 #define GS_MIINT (1<<1)         /* ro */
103 #define GS_GSCI  1              /* rwc */
104 #define GS_RO_MASK (GS_B3S12|                   \
105                     GS_B2S12|                   \
106                     GS_B1S12|                   \
107                     GS_S1CR|                    \
108                     GS_S0CR|                    \
109                     GS_MINT|                    \
110                     GS_POINT|                   \
111                     GS_PIINT|                   \
112                     GS_RSRVD|                   \
113                     GS_MOINT|                   \
114                     GS_MIINT)
115 #define GS_VALID_MASK ((1 << 18) - 1)
116 #define GS_WCLEAR_MASK (GS_RCS|GS_S1R1|GS_S0R1|GS_GSCI)
117 
118 #define BD_IOC (1<<31)
119 #define BD_BUP (1<<30)
120 
121 #define EACS_VRA 1
122 #define EACS_VRM 8
123 
124 #define MUTE_SHIFT 15
125 
126 #define TYPE_AC97 "AC97"
127 #define AC97(obj) \
128     OBJECT_CHECK(AC97LinkState, (obj), TYPE_AC97)
129 
130 #define REC_MASK 7
131 enum {
132     REC_MIC = 0,
133     REC_CD,
134     REC_VIDEO,
135     REC_AUX,
136     REC_LINE_IN,
137     REC_STEREO_MIX,
138     REC_MONO_MIX,
139     REC_PHONE
140 };
141 
142 typedef struct BD {
143     uint32_t addr;
144     uint32_t ctl_len;
145 } BD;
146 
147 typedef struct AC97BusMasterRegs {
148     uint32_t bdbar;             /* rw 0 */
149     uint8_t civ;                /* ro 0 */
150     uint8_t lvi;                /* rw 0 */
151     uint16_t sr;                /* rw 1 */
152     uint16_t picb;              /* ro 0 */
153     uint8_t piv;                /* ro 0 */
154     uint8_t cr;                 /* rw 0 */
155     unsigned int bd_valid;
156     BD bd;
157 } AC97BusMasterRegs;
158 
159 typedef struct AC97LinkState {
160     PCIDevice dev;
161     QEMUSoundCard card;
162     uint32_t use_broken_id;
163     uint32_t glob_cnt;
164     uint32_t glob_sta;
165     uint32_t cas;
166     uint32_t last_samp;
167     AC97BusMasterRegs bm_regs[3];
168     uint8_t mixer_data[256];
169     SWVoiceIn *voice_pi;
170     SWVoiceOut *voice_po;
171     SWVoiceIn *voice_mc;
172     int invalid_freq[3];
173     uint8_t silence[128];
174     int bup_flag;
175     MemoryRegion io_nam;
176     MemoryRegion io_nabm;
177 } AC97LinkState;
178 
179 enum {
180     BUP_SET = 1,
181     BUP_LAST = 2
182 };
183 
184 #ifdef DEBUG_AC97
185 #define dolog(...) AUD_log ("ac97", __VA_ARGS__)
186 #else
187 #define dolog(...)
188 #endif
189 
190 #define MKREGS(prefix, start)                   \
191 enum {                                          \
192     prefix ## _BDBAR = start,                   \
193     prefix ## _CIV = start + 4,                 \
194     prefix ## _LVI = start + 5,                 \
195     prefix ## _SR = start + 6,                  \
196     prefix ## _PICB = start + 8,                \
197     prefix ## _PIV = start + 10,                \
198     prefix ## _CR = start + 11                  \
199 }
200 
201 enum {
202     PI_INDEX = 0,
203     PO_INDEX,
204     MC_INDEX,
205     LAST_INDEX
206 };
207 
208 MKREGS (PI, PI_INDEX * 16);
209 MKREGS (PO, PO_INDEX * 16);
210 MKREGS (MC, MC_INDEX * 16);
211 
212 enum {
213     GLOB_CNT = 0x2c,
214     GLOB_STA = 0x30,
215     CAS      = 0x34
216 };
217 
218 #define GET_BM(index) (((index) >> 4) & 3)
219 
220 static void po_callback (void *opaque, int free);
221 static void pi_callback (void *opaque, int avail);
222 static void mc_callback (void *opaque, int avail);
223 
224 static void warm_reset (AC97LinkState *s)
225 {
226     (void) s;
227 }
228 
229 static void cold_reset (AC97LinkState * s)
230 {
231     (void) s;
232 }
233 
234 static void fetch_bd (AC97LinkState *s, AC97BusMasterRegs *r)
235 {
236     uint8_t b[8];
237 
238     pci_dma_read (&s->dev, r->bdbar + r->civ * 8, b, 8);
239     r->bd_valid = 1;
240     r->bd.addr = le32_to_cpu (*(uint32_t *) &b[0]) & ~3;
241     r->bd.ctl_len = le32_to_cpu (*(uint32_t *) &b[4]);
242     r->picb = r->bd.ctl_len & 0xffff;
243     dolog ("bd %2d addr=%#x ctl=%#06x len=%#x(%d bytes)\n",
244            r->civ, r->bd.addr, r->bd.ctl_len >> 16,
245            r->bd.ctl_len & 0xffff,
246            (r->bd.ctl_len & 0xffff) << 1);
247 }
248 
249 static void update_sr (AC97LinkState *s, AC97BusMasterRegs *r, uint32_t new_sr)
250 {
251     int event = 0;
252     int level = 0;
253     uint32_t new_mask = new_sr & SR_INT_MASK;
254     uint32_t old_mask = r->sr & SR_INT_MASK;
255     uint32_t masks[] = {GS_PIINT, GS_POINT, GS_MINT};
256 
257     if (new_mask ^ old_mask) {
258         /** @todo is IRQ deasserted when only one of status bits is cleared? */
259         if (!new_mask) {
260             event = 1;
261             level = 0;
262         }
263         else {
264             if ((new_mask & SR_LVBCI) && (r->cr & CR_LVBIE)) {
265                 event = 1;
266                 level = 1;
267             }
268             if ((new_mask & SR_BCIS) && (r->cr & CR_IOCE)) {
269                 event = 1;
270                 level = 1;
271             }
272         }
273     }
274 
275     r->sr = new_sr;
276 
277     dolog ("IOC%d LVB%d sr=%#x event=%d level=%d\n",
278            r->sr & SR_BCIS, r->sr & SR_LVBCI,
279            r->sr,
280            event, level);
281 
282     if (!event)
283         return;
284 
285     if (level) {
286         s->glob_sta |= masks[r - s->bm_regs];
287         dolog ("set irq level=1\n");
288         pci_irq_assert(&s->dev);
289     }
290     else {
291         s->glob_sta &= ~masks[r - s->bm_regs];
292         dolog ("set irq level=0\n");
293         pci_irq_deassert(&s->dev);
294     }
295 }
296 
297 static void voice_set_active (AC97LinkState *s, int bm_index, int on)
298 {
299     switch (bm_index) {
300     case PI_INDEX:
301         AUD_set_active_in (s->voice_pi, on);
302         break;
303 
304     case PO_INDEX:
305         AUD_set_active_out (s->voice_po, on);
306         break;
307 
308     case MC_INDEX:
309         AUD_set_active_in (s->voice_mc, on);
310         break;
311 
312     default:
313         AUD_log ("ac97", "invalid bm_index(%d) in voice_set_active", bm_index);
314         break;
315     }
316 }
317 
318 static void reset_bm_regs (AC97LinkState *s, AC97BusMasterRegs *r)
319 {
320     dolog ("reset_bm_regs\n");
321     r->bdbar = 0;
322     r->civ = 0;
323     r->lvi = 0;
324     /** todo do we need to do that? */
325     update_sr (s, r, SR_DCH);
326     r->picb = 0;
327     r->piv = 0;
328     r->cr = r->cr & CR_DONT_CLEAR_MASK;
329     r->bd_valid = 0;
330 
331     voice_set_active (s, r - s->bm_regs, 0);
332     memset (s->silence, 0, sizeof (s->silence));
333 }
334 
335 static void mixer_store (AC97LinkState *s, uint32_t i, uint16_t v)
336 {
337     if (i + 2 > sizeof (s->mixer_data)) {
338         dolog ("mixer_store: index %d out of bounds %zd\n",
339                i, sizeof (s->mixer_data));
340         return;
341     }
342 
343     s->mixer_data[i + 0] = v & 0xff;
344     s->mixer_data[i + 1] = v >> 8;
345 }
346 
347 static uint16_t mixer_load (AC97LinkState *s, uint32_t i)
348 {
349     uint16_t val = 0xffff;
350 
351     if (i + 2 > sizeof (s->mixer_data)) {
352         dolog ("mixer_load: index %d out of bounds %zd\n",
353                i, sizeof (s->mixer_data));
354     }
355     else {
356         val = s->mixer_data[i + 0] | (s->mixer_data[i + 1] << 8);
357     }
358 
359     return val;
360 }
361 
362 static void open_voice (AC97LinkState *s, int index, int freq)
363 {
364     struct audsettings as;
365 
366     as.freq = freq;
367     as.nchannels = 2;
368     as.fmt = AUD_FMT_S16;
369     as.endianness = 0;
370 
371     if (freq > 0) {
372         s->invalid_freq[index] = 0;
373         switch (index) {
374         case PI_INDEX:
375             s->voice_pi = AUD_open_in (
376                 &s->card,
377                 s->voice_pi,
378                 "ac97.pi",
379                 s,
380                 pi_callback,
381                 &as
382                 );
383             break;
384 
385         case PO_INDEX:
386             s->voice_po = AUD_open_out (
387                 &s->card,
388                 s->voice_po,
389                 "ac97.po",
390                 s,
391                 po_callback,
392                 &as
393                 );
394             break;
395 
396         case MC_INDEX:
397             s->voice_mc = AUD_open_in (
398                 &s->card,
399                 s->voice_mc,
400                 "ac97.mc",
401                 s,
402                 mc_callback,
403                 &as
404                 );
405             break;
406         }
407     }
408     else {
409         s->invalid_freq[index] = freq;
410         switch (index) {
411         case PI_INDEX:
412             AUD_close_in (&s->card, s->voice_pi);
413             s->voice_pi = NULL;
414             break;
415 
416         case PO_INDEX:
417             AUD_close_out (&s->card, s->voice_po);
418             s->voice_po = NULL;
419             break;
420 
421         case MC_INDEX:
422             AUD_close_in (&s->card, s->voice_mc);
423             s->voice_mc = NULL;
424             break;
425         }
426     }
427 }
428 
429 static void reset_voices (AC97LinkState *s, uint8_t active[LAST_INDEX])
430 {
431     uint16_t freq;
432 
433     freq = mixer_load (s, AC97_PCM_LR_ADC_Rate);
434     open_voice (s, PI_INDEX, freq);
435     AUD_set_active_in (s->voice_pi, active[PI_INDEX]);
436 
437     freq = mixer_load (s, AC97_PCM_Front_DAC_Rate);
438     open_voice (s, PO_INDEX, freq);
439     AUD_set_active_out (s->voice_po, active[PO_INDEX]);
440 
441     freq = mixer_load (s, AC97_MIC_ADC_Rate);
442     open_voice (s, MC_INDEX, freq);
443     AUD_set_active_in (s->voice_mc, active[MC_INDEX]);
444 }
445 
446 static void get_volume (uint16_t vol, uint16_t mask, int inverse,
447                         int *mute, uint8_t *lvol, uint8_t *rvol)
448 {
449     *mute = (vol >> MUTE_SHIFT) & 1;
450     *rvol = (255 * (vol & mask)) / mask;
451     *lvol = (255 * ((vol >> 8) & mask)) / mask;
452 
453     if (inverse) {
454         *rvol = 255 - *rvol;
455         *lvol = 255 - *lvol;
456     }
457 }
458 
459 static void update_combined_volume_out (AC97LinkState *s)
460 {
461     uint8_t lvol, rvol, plvol, prvol;
462     int mute, pmute;
463 
464     get_volume (mixer_load (s, AC97_Master_Volume_Mute), 0x3f, 1,
465                 &mute, &lvol, &rvol);
466     get_volume (mixer_load (s, AC97_PCM_Out_Volume_Mute), 0x1f, 1,
467                 &pmute, &plvol, &prvol);
468 
469     mute = mute | pmute;
470     lvol = (lvol * plvol) / 255;
471     rvol = (rvol * prvol) / 255;
472 
473     AUD_set_volume_out (s->voice_po, mute, lvol, rvol);
474 }
475 
476 static void update_volume_in (AC97LinkState *s)
477 {
478     uint8_t lvol, rvol;
479     int mute;
480 
481     get_volume (mixer_load (s, AC97_Record_Gain_Mute), 0x0f, 0,
482                 &mute, &lvol, &rvol);
483 
484     AUD_set_volume_in (s->voice_pi, mute, lvol, rvol);
485 }
486 
487 static void set_volume (AC97LinkState *s, int index, uint32_t val)
488 {
489     switch (index) {
490     case AC97_Master_Volume_Mute:
491         val &= 0xbf3f;
492         mixer_store (s, index, val);
493         update_combined_volume_out (s);
494         break;
495     case AC97_PCM_Out_Volume_Mute:
496         val &= 0x9f1f;
497         mixer_store (s, index, val);
498         update_combined_volume_out (s);
499         break;
500     case AC97_Record_Gain_Mute:
501         val &= 0x8f0f;
502         mixer_store (s, index, val);
503         update_volume_in (s);
504         break;
505     }
506 }
507 
508 static void record_select (AC97LinkState *s, uint32_t val)
509 {
510     uint8_t rs = val & REC_MASK;
511     uint8_t ls = (val >> 8) & REC_MASK;
512     mixer_store (s, AC97_Record_Select, rs | (ls << 8));
513 }
514 
515 static void mixer_reset (AC97LinkState *s)
516 {
517     uint8_t active[LAST_INDEX];
518 
519     dolog ("mixer_reset\n");
520     memset (s->mixer_data, 0, sizeof (s->mixer_data));
521     memset (active, 0, sizeof (active));
522     mixer_store (s, AC97_Reset                   , 0x0000); /* 6940 */
523     mixer_store (s, AC97_Headphone_Volume_Mute   , 0x0000);
524     mixer_store (s, AC97_Master_Volume_Mono_Mute , 0x0000);
525     mixer_store (s, AC97_Master_Tone_RL,           0x0000);
526     mixer_store (s, AC97_PC_BEEP_Volume_Mute     , 0x0000);
527     mixer_store (s, AC97_Phone_Volume_Mute       , 0x0000);
528     mixer_store (s, AC97_Mic_Volume_Mute         , 0x0000);
529     mixer_store (s, AC97_Line_In_Volume_Mute     , 0x0000);
530     mixer_store (s, AC97_CD_Volume_Mute          , 0x0000);
531     mixer_store (s, AC97_Video_Volume_Mute       , 0x0000);
532     mixer_store (s, AC97_Aux_Volume_Mute         , 0x0000);
533     mixer_store (s, AC97_Record_Gain_Mic_Mute    , 0x0000);
534     mixer_store (s, AC97_General_Purpose         , 0x0000);
535     mixer_store (s, AC97_3D_Control              , 0x0000);
536     mixer_store (s, AC97_Powerdown_Ctrl_Stat     , 0x000f);
537 
538     /*
539      * Sigmatel 9700 (STAC9700)
540      */
541     mixer_store (s, AC97_Vendor_ID1              , 0x8384);
542     mixer_store (s, AC97_Vendor_ID2              , 0x7600); /* 7608 */
543 
544     mixer_store (s, AC97_Extended_Audio_ID       , 0x0809);
545     mixer_store (s, AC97_Extended_Audio_Ctrl_Stat, 0x0009);
546     mixer_store (s, AC97_PCM_Front_DAC_Rate      , 0xbb80);
547     mixer_store (s, AC97_PCM_Surround_DAC_Rate   , 0xbb80);
548     mixer_store (s, AC97_PCM_LFE_DAC_Rate        , 0xbb80);
549     mixer_store (s, AC97_PCM_LR_ADC_Rate         , 0xbb80);
550     mixer_store (s, AC97_MIC_ADC_Rate            , 0xbb80);
551 
552     record_select (s, 0);
553     set_volume (s, AC97_Master_Volume_Mute, 0x8000);
554     set_volume (s, AC97_PCM_Out_Volume_Mute, 0x8808);
555     set_volume (s, AC97_Record_Gain_Mute, 0x8808);
556 
557     reset_voices (s, active);
558 }
559 
560 /**
561  * Native audio mixer
562  * I/O Reads
563  */
564 static uint32_t nam_readb (void *opaque, uint32_t addr)
565 {
566     AC97LinkState *s = opaque;
567     dolog ("U nam readb %#x\n", addr);
568     s->cas = 0;
569     return ~0U;
570 }
571 
572 static uint32_t nam_readw (void *opaque, uint32_t addr)
573 {
574     AC97LinkState *s = opaque;
575     uint32_t val = ~0U;
576     uint32_t index = addr;
577     s->cas = 0;
578     val = mixer_load (s, index);
579     return val;
580 }
581 
582 static uint32_t nam_readl (void *opaque, uint32_t addr)
583 {
584     AC97LinkState *s = opaque;
585     dolog ("U nam readl %#x\n", addr);
586     s->cas = 0;
587     return ~0U;
588 }
589 
590 /**
591  * Native audio mixer
592  * I/O Writes
593  */
594 static void nam_writeb (void *opaque, uint32_t addr, uint32_t val)
595 {
596     AC97LinkState *s = opaque;
597     dolog ("U nam writeb %#x <- %#x\n", addr, val);
598     s->cas = 0;
599 }
600 
601 static void nam_writew (void *opaque, uint32_t addr, uint32_t val)
602 {
603     AC97LinkState *s = opaque;
604     uint32_t index = addr;
605     s->cas = 0;
606     switch (index) {
607     case AC97_Reset:
608         mixer_reset (s);
609         break;
610     case AC97_Powerdown_Ctrl_Stat:
611         val &= ~0x800f;
612         val |= mixer_load (s, index) & 0xf;
613         mixer_store (s, index, val);
614         break;
615     case AC97_PCM_Out_Volume_Mute:
616     case AC97_Master_Volume_Mute:
617     case AC97_Record_Gain_Mute:
618         set_volume (s, index, val);
619         break;
620     case AC97_Record_Select:
621         record_select (s, val);
622         break;
623     case AC97_Vendor_ID1:
624     case AC97_Vendor_ID2:
625         dolog ("Attempt to write vendor ID to %#x\n", val);
626         break;
627     case AC97_Extended_Audio_ID:
628         dolog ("Attempt to write extended audio ID to %#x\n", val);
629         break;
630     case AC97_Extended_Audio_Ctrl_Stat:
631         if (!(val & EACS_VRA)) {
632             mixer_store (s, AC97_PCM_Front_DAC_Rate, 0xbb80);
633             mixer_store (s, AC97_PCM_LR_ADC_Rate,    0xbb80);
634             open_voice (s, PI_INDEX, 48000);
635             open_voice (s, PO_INDEX, 48000);
636         }
637         if (!(val & EACS_VRM)) {
638             mixer_store (s, AC97_MIC_ADC_Rate, 0xbb80);
639             open_voice (s, MC_INDEX, 48000);
640         }
641         dolog ("Setting extended audio control to %#x\n", val);
642         mixer_store (s, AC97_Extended_Audio_Ctrl_Stat, val);
643         break;
644     case AC97_PCM_Front_DAC_Rate:
645         if (mixer_load (s, AC97_Extended_Audio_Ctrl_Stat) & EACS_VRA) {
646             mixer_store (s, index, val);
647             dolog ("Set front DAC rate to %d\n", val);
648             open_voice (s, PO_INDEX, val);
649         }
650         else {
651             dolog ("Attempt to set front DAC rate to %d, "
652                    "but VRA is not set\n",
653                    val);
654         }
655         break;
656     case AC97_MIC_ADC_Rate:
657         if (mixer_load (s, AC97_Extended_Audio_Ctrl_Stat) & EACS_VRM) {
658             mixer_store (s, index, val);
659             dolog ("Set MIC ADC rate to %d\n", val);
660             open_voice (s, MC_INDEX, val);
661         }
662         else {
663             dolog ("Attempt to set MIC ADC rate to %d, "
664                    "but VRM is not set\n",
665                    val);
666         }
667         break;
668     case AC97_PCM_LR_ADC_Rate:
669         if (mixer_load (s, AC97_Extended_Audio_Ctrl_Stat) & EACS_VRA) {
670             mixer_store (s, index, val);
671             dolog ("Set front LR ADC rate to %d\n", val);
672             open_voice (s, PI_INDEX, val);
673         }
674         else {
675             dolog ("Attempt to set LR ADC rate to %d, but VRA is not set\n",
676                     val);
677         }
678         break;
679     case AC97_Headphone_Volume_Mute:
680     case AC97_Master_Volume_Mono_Mute:
681     case AC97_Master_Tone_RL:
682     case AC97_PC_BEEP_Volume_Mute:
683     case AC97_Phone_Volume_Mute:
684     case AC97_Mic_Volume_Mute:
685     case AC97_Line_In_Volume_Mute:
686     case AC97_CD_Volume_Mute:
687     case AC97_Video_Volume_Mute:
688     case AC97_Aux_Volume_Mute:
689     case AC97_Record_Gain_Mic_Mute:
690     case AC97_General_Purpose:
691     case AC97_3D_Control:
692     case AC97_Sigmatel_Analog:
693     case AC97_Sigmatel_Dac2Invert:
694         /* None of the features in these regs are emulated, so they are RO */
695         break;
696     default:
697         dolog ("U nam writew %#x <- %#x\n", addr, val);
698         mixer_store (s, index, val);
699         break;
700     }
701 }
702 
703 static void nam_writel (void *opaque, uint32_t addr, uint32_t val)
704 {
705     AC97LinkState *s = opaque;
706     dolog ("U nam writel %#x <- %#x\n", addr, val);
707     s->cas = 0;
708 }
709 
710 /**
711  * Native audio bus master
712  * I/O Reads
713  */
714 static uint32_t nabm_readb (void *opaque, uint32_t addr)
715 {
716     AC97LinkState *s = opaque;
717     AC97BusMasterRegs *r = NULL;
718     uint32_t index = addr;
719     uint32_t val = ~0U;
720 
721     switch (index) {
722     case CAS:
723         dolog ("CAS %d\n", s->cas);
724         val = s->cas;
725         s->cas = 1;
726         break;
727     case PI_CIV:
728     case PO_CIV:
729     case MC_CIV:
730         r = &s->bm_regs[GET_BM (index)];
731         val = r->civ;
732         dolog ("CIV[%d] -> %#x\n", GET_BM (index), val);
733         break;
734     case PI_LVI:
735     case PO_LVI:
736     case MC_LVI:
737         r = &s->bm_regs[GET_BM (index)];
738         val = r->lvi;
739         dolog ("LVI[%d] -> %#x\n", GET_BM (index), val);
740         break;
741     case PI_PIV:
742     case PO_PIV:
743     case MC_PIV:
744         r = &s->bm_regs[GET_BM (index)];
745         val = r->piv;
746         dolog ("PIV[%d] -> %#x\n", GET_BM (index), val);
747         break;
748     case PI_CR:
749     case PO_CR:
750     case MC_CR:
751         r = &s->bm_regs[GET_BM (index)];
752         val = r->cr;
753         dolog ("CR[%d] -> %#x\n", GET_BM (index), val);
754         break;
755     case PI_SR:
756     case PO_SR:
757     case MC_SR:
758         r = &s->bm_regs[GET_BM (index)];
759         val = r->sr & 0xff;
760         dolog ("SRb[%d] -> %#x\n", GET_BM (index), val);
761         break;
762     default:
763         dolog ("U nabm readb %#x -> %#x\n", addr, val);
764         break;
765     }
766     return val;
767 }
768 
769 static uint32_t nabm_readw (void *opaque, uint32_t addr)
770 {
771     AC97LinkState *s = opaque;
772     AC97BusMasterRegs *r = NULL;
773     uint32_t index = addr;
774     uint32_t val = ~0U;
775 
776     switch (index) {
777     case PI_SR:
778     case PO_SR:
779     case MC_SR:
780         r = &s->bm_regs[GET_BM (index)];
781         val = r->sr;
782         dolog ("SR[%d] -> %#x\n", GET_BM (index), val);
783         break;
784     case PI_PICB:
785     case PO_PICB:
786     case MC_PICB:
787         r = &s->bm_regs[GET_BM (index)];
788         val = r->picb;
789         dolog ("PICB[%d] -> %#x\n", GET_BM (index), val);
790         break;
791     default:
792         dolog ("U nabm readw %#x -> %#x\n", addr, val);
793         break;
794     }
795     return val;
796 }
797 
798 static uint32_t nabm_readl (void *opaque, uint32_t addr)
799 {
800     AC97LinkState *s = opaque;
801     AC97BusMasterRegs *r = NULL;
802     uint32_t index = addr;
803     uint32_t val = ~0U;
804 
805     switch (index) {
806     case PI_BDBAR:
807     case PO_BDBAR:
808     case MC_BDBAR:
809         r = &s->bm_regs[GET_BM (index)];
810         val = r->bdbar;
811         dolog ("BMADDR[%d] -> %#x\n", GET_BM (index), val);
812         break;
813     case PI_CIV:
814     case PO_CIV:
815     case MC_CIV:
816         r = &s->bm_regs[GET_BM (index)];
817         val = r->civ | (r->lvi << 8) | (r->sr << 16);
818         dolog ("CIV LVI SR[%d] -> %#x, %#x, %#x\n", GET_BM (index),
819                r->civ, r->lvi, r->sr);
820         break;
821     case PI_PICB:
822     case PO_PICB:
823     case MC_PICB:
824         r = &s->bm_regs[GET_BM (index)];
825         val = r->picb | (r->piv << 16) | (r->cr << 24);
826         dolog ("PICB PIV CR[%d] -> %#x %#x %#x %#x\n", GET_BM (index),
827                val, r->picb, r->piv, r->cr);
828         break;
829     case GLOB_CNT:
830         val = s->glob_cnt;
831         dolog ("glob_cnt -> %#x\n", val);
832         break;
833     case GLOB_STA:
834         val = s->glob_sta | GS_S0CR;
835         dolog ("glob_sta -> %#x\n", val);
836         break;
837     default:
838         dolog ("U nabm readl %#x -> %#x\n", addr, val);
839         break;
840     }
841     return val;
842 }
843 
844 /**
845  * Native audio bus master
846  * I/O Writes
847  */
848 static void nabm_writeb (void *opaque, uint32_t addr, uint32_t val)
849 {
850     AC97LinkState *s = opaque;
851     AC97BusMasterRegs *r = NULL;
852     uint32_t index = addr;
853     switch (index) {
854     case PI_LVI:
855     case PO_LVI:
856     case MC_LVI:
857         r = &s->bm_regs[GET_BM (index)];
858         if ((r->cr & CR_RPBM) && (r->sr & SR_DCH)) {
859             r->sr &= ~(SR_DCH | SR_CELV);
860             r->civ = r->piv;
861             r->piv = (r->piv + 1) % 32;
862             fetch_bd (s, r);
863         }
864         r->lvi = val % 32;
865         dolog ("LVI[%d] <- %#x\n", GET_BM (index), val);
866         break;
867     case PI_CR:
868     case PO_CR:
869     case MC_CR:
870         r = &s->bm_regs[GET_BM (index)];
871         if (val & CR_RR) {
872             reset_bm_regs (s, r);
873         }
874         else {
875             r->cr = val & CR_VALID_MASK;
876             if (!(r->cr & CR_RPBM)) {
877                 voice_set_active (s, r - s->bm_regs, 0);
878                 r->sr |= SR_DCH;
879             }
880             else {
881                 r->civ = r->piv;
882                 r->piv = (r->piv + 1) % 32;
883                 fetch_bd (s, r);
884                 r->sr &= ~SR_DCH;
885                 voice_set_active (s, r - s->bm_regs, 1);
886             }
887         }
888         dolog ("CR[%d] <- %#x (cr %#x)\n", GET_BM (index), val, r->cr);
889         break;
890     case PI_SR:
891     case PO_SR:
892     case MC_SR:
893         r = &s->bm_regs[GET_BM (index)];
894         r->sr |= val & ~(SR_RO_MASK | SR_WCLEAR_MASK);
895         update_sr (s, r, r->sr & ~(val & SR_WCLEAR_MASK));
896         dolog ("SR[%d] <- %#x (sr %#x)\n", GET_BM (index), val, r->sr);
897         break;
898     default:
899         dolog ("U nabm writeb %#x <- %#x\n", addr, val);
900         break;
901     }
902 }
903 
904 static void nabm_writew (void *opaque, uint32_t addr, uint32_t val)
905 {
906     AC97LinkState *s = opaque;
907     AC97BusMasterRegs *r = NULL;
908     uint32_t index = addr;
909     switch (index) {
910     case PI_SR:
911     case PO_SR:
912     case MC_SR:
913         r = &s->bm_regs[GET_BM (index)];
914         r->sr |= val & ~(SR_RO_MASK | SR_WCLEAR_MASK);
915         update_sr (s, r, r->sr & ~(val & SR_WCLEAR_MASK));
916         dolog ("SR[%d] <- %#x (sr %#x)\n", GET_BM (index), val, r->sr);
917         break;
918     default:
919         dolog ("U nabm writew %#x <- %#x\n", addr, val);
920         break;
921     }
922 }
923 
924 static void nabm_writel (void *opaque, uint32_t addr, uint32_t val)
925 {
926     AC97LinkState *s = opaque;
927     AC97BusMasterRegs *r = NULL;
928     uint32_t index = addr;
929     switch (index) {
930     case PI_BDBAR:
931     case PO_BDBAR:
932     case MC_BDBAR:
933         r = &s->bm_regs[GET_BM (index)];
934         r->bdbar = val & ~3;
935         dolog ("BDBAR[%d] <- %#x (bdbar %#x)\n",
936                GET_BM (index), val, r->bdbar);
937         break;
938     case GLOB_CNT:
939         if (val & GC_WR)
940             warm_reset (s);
941         if (val & GC_CR)
942             cold_reset (s);
943         if (!(val & (GC_WR | GC_CR)))
944             s->glob_cnt = val & GC_VALID_MASK;
945         dolog ("glob_cnt <- %#x (glob_cnt %#x)\n", val, s->glob_cnt);
946         break;
947     case GLOB_STA:
948         s->glob_sta &= ~(val & GS_WCLEAR_MASK);
949         s->glob_sta |= (val & ~(GS_WCLEAR_MASK | GS_RO_MASK)) & GS_VALID_MASK;
950         dolog ("glob_sta <- %#x (glob_sta %#x)\n", val, s->glob_sta);
951         break;
952     default:
953         dolog ("U nabm writel %#x <- %#x\n", addr, val);
954         break;
955     }
956 }
957 
958 static int write_audio (AC97LinkState *s, AC97BusMasterRegs *r,
959                         int max, int *stop)
960 {
961     uint8_t tmpbuf[4096];
962     uint32_t addr = r->bd.addr;
963     uint32_t temp = r->picb << 1;
964     uint32_t written = 0;
965     int to_copy = 0;
966     temp = audio_MIN (temp, max);
967 
968     if (!temp) {
969         *stop = 1;
970         return 0;
971     }
972 
973     while (temp) {
974         int copied;
975         to_copy = audio_MIN (temp, sizeof (tmpbuf));
976         pci_dma_read (&s->dev, addr, tmpbuf, to_copy);
977         copied = AUD_write (s->voice_po, tmpbuf, to_copy);
978         dolog ("write_audio max=%x to_copy=%x copied=%x\n",
979                max, to_copy, copied);
980         if (!copied) {
981             *stop = 1;
982             break;
983         }
984         temp -= copied;
985         addr += copied;
986         written += copied;
987     }
988 
989     if (!temp) {
990         if (to_copy < 4) {
991             dolog ("whoops\n");
992             s->last_samp = 0;
993         }
994         else {
995             s->last_samp = *(uint32_t *) &tmpbuf[to_copy - 4];
996         }
997     }
998 
999     r->bd.addr = addr;
1000     return written;
1001 }
1002 
1003 static void write_bup (AC97LinkState *s, int elapsed)
1004 {
1005     dolog ("write_bup\n");
1006     if (!(s->bup_flag & BUP_SET)) {
1007         if (s->bup_flag & BUP_LAST) {
1008             int i;
1009             uint8_t *p = s->silence;
1010             for (i = 0; i < sizeof (s->silence) / 4; i++, p += 4) {
1011                 *(uint32_t *) p = s->last_samp;
1012             }
1013         }
1014         else {
1015             memset (s->silence, 0, sizeof (s->silence));
1016         }
1017         s->bup_flag |= BUP_SET;
1018     }
1019 
1020     while (elapsed) {
1021         int temp = audio_MIN (elapsed, sizeof (s->silence));
1022         while (temp) {
1023             int copied = AUD_write (s->voice_po, s->silence, temp);
1024             if (!copied)
1025                 return;
1026             temp -= copied;
1027             elapsed -= copied;
1028         }
1029     }
1030 }
1031 
1032 static int read_audio (AC97LinkState *s, AC97BusMasterRegs *r,
1033                        int max, int *stop)
1034 {
1035     uint8_t tmpbuf[4096];
1036     uint32_t addr = r->bd.addr;
1037     uint32_t temp = r->picb << 1;
1038     uint32_t nread = 0;
1039     int to_copy = 0;
1040     SWVoiceIn *voice = (r - s->bm_regs) == MC_INDEX ? s->voice_mc : s->voice_pi;
1041 
1042     temp = audio_MIN (temp, max);
1043 
1044     if (!temp) {
1045         *stop = 1;
1046         return 0;
1047     }
1048 
1049     while (temp) {
1050         int acquired;
1051         to_copy = audio_MIN (temp, sizeof (tmpbuf));
1052         acquired = AUD_read (voice, tmpbuf, to_copy);
1053         if (!acquired) {
1054             *stop = 1;
1055             break;
1056         }
1057         pci_dma_write (&s->dev, addr, tmpbuf, acquired);
1058         temp -= acquired;
1059         addr += acquired;
1060         nread += acquired;
1061     }
1062 
1063     r->bd.addr = addr;
1064     return nread;
1065 }
1066 
1067 static void transfer_audio (AC97LinkState *s, int index, int elapsed)
1068 {
1069     AC97BusMasterRegs *r = &s->bm_regs[index];
1070     int stop = 0;
1071 
1072     if (s->invalid_freq[index]) {
1073         AUD_log ("ac97", "attempt to use voice %d with invalid frequency %d\n",
1074                  index, s->invalid_freq[index]);
1075         return;
1076     }
1077 
1078     if (r->sr & SR_DCH) {
1079         if (r->cr & CR_RPBM) {
1080             switch (index) {
1081             case PO_INDEX:
1082                 write_bup (s, elapsed);
1083                 break;
1084             }
1085         }
1086         return;
1087     }
1088 
1089     while ((elapsed >> 1) && !stop) {
1090         int temp;
1091 
1092         if (!r->bd_valid) {
1093             dolog ("invalid bd\n");
1094             fetch_bd (s, r);
1095         }
1096 
1097         if (!r->picb) {
1098             dolog ("fresh bd %d is empty %#x %#x\n",
1099                    r->civ, r->bd.addr, r->bd.ctl_len);
1100             if (r->civ == r->lvi) {
1101                 r->sr |= SR_DCH; /* CELV? */
1102                 s->bup_flag = 0;
1103                 break;
1104             }
1105             r->sr &= ~SR_CELV;
1106             r->civ = r->piv;
1107             r->piv = (r->piv + 1) % 32;
1108             fetch_bd (s, r);
1109             return;
1110         }
1111 
1112         switch (index) {
1113         case PO_INDEX:
1114             temp = write_audio (s, r, elapsed, &stop);
1115             elapsed -= temp;
1116             r->picb -= (temp >> 1);
1117             break;
1118 
1119         case PI_INDEX:
1120         case MC_INDEX:
1121             temp = read_audio (s, r, elapsed, &stop);
1122             elapsed -= temp;
1123             r->picb -= (temp >> 1);
1124             break;
1125         }
1126 
1127         if (!r->picb) {
1128             uint32_t new_sr = r->sr & ~SR_CELV;
1129 
1130             if (r->bd.ctl_len & BD_IOC) {
1131                 new_sr |= SR_BCIS;
1132             }
1133 
1134             if (r->civ == r->lvi) {
1135                 dolog ("Underrun civ (%d) == lvi (%d)\n", r->civ, r->lvi);
1136 
1137                 new_sr |= SR_LVBCI | SR_DCH | SR_CELV;
1138                 stop = 1;
1139                 s->bup_flag = (r->bd.ctl_len & BD_BUP) ? BUP_LAST : 0;
1140             }
1141             else {
1142                 r->civ = r->piv;
1143                 r->piv = (r->piv + 1) % 32;
1144                 fetch_bd (s, r);
1145             }
1146 
1147             update_sr (s, r, new_sr);
1148         }
1149     }
1150 }
1151 
1152 static void pi_callback (void *opaque, int avail)
1153 {
1154     transfer_audio (opaque, PI_INDEX, avail);
1155 }
1156 
1157 static void mc_callback (void *opaque, int avail)
1158 {
1159     transfer_audio (opaque, MC_INDEX, avail);
1160 }
1161 
1162 static void po_callback (void *opaque, int free)
1163 {
1164     transfer_audio (opaque, PO_INDEX, free);
1165 }
1166 
1167 static const VMStateDescription vmstate_ac97_bm_regs = {
1168     .name = "ac97_bm_regs",
1169     .version_id = 1,
1170     .minimum_version_id = 1,
1171     .fields = (VMStateField[]) {
1172         VMSTATE_UINT32 (bdbar, AC97BusMasterRegs),
1173         VMSTATE_UINT8 (civ, AC97BusMasterRegs),
1174         VMSTATE_UINT8 (lvi, AC97BusMasterRegs),
1175         VMSTATE_UINT16 (sr, AC97BusMasterRegs),
1176         VMSTATE_UINT16 (picb, AC97BusMasterRegs),
1177         VMSTATE_UINT8 (piv, AC97BusMasterRegs),
1178         VMSTATE_UINT8 (cr, AC97BusMasterRegs),
1179         VMSTATE_UINT32 (bd_valid, AC97BusMasterRegs),
1180         VMSTATE_UINT32 (bd.addr, AC97BusMasterRegs),
1181         VMSTATE_UINT32 (bd.ctl_len, AC97BusMasterRegs),
1182         VMSTATE_END_OF_LIST ()
1183     }
1184 };
1185 
1186 static int ac97_post_load (void *opaque, int version_id)
1187 {
1188     uint8_t active[LAST_INDEX];
1189     AC97LinkState *s = opaque;
1190 
1191     record_select (s, mixer_load (s, AC97_Record_Select));
1192     set_volume (s, AC97_Master_Volume_Mute,
1193                 mixer_load (s, AC97_Master_Volume_Mute));
1194     set_volume (s, AC97_PCM_Out_Volume_Mute,
1195                 mixer_load (s, AC97_PCM_Out_Volume_Mute));
1196     set_volume (s, AC97_Record_Gain_Mute,
1197                 mixer_load (s, AC97_Record_Gain_Mute));
1198 
1199     active[PI_INDEX] = !!(s->bm_regs[PI_INDEX].cr & CR_RPBM);
1200     active[PO_INDEX] = !!(s->bm_regs[PO_INDEX].cr & CR_RPBM);
1201     active[MC_INDEX] = !!(s->bm_regs[MC_INDEX].cr & CR_RPBM);
1202     reset_voices (s, active);
1203 
1204     s->bup_flag = 0;
1205     s->last_samp = 0;
1206     return 0;
1207 }
1208 
1209 static bool is_version_2 (void *opaque, int version_id)
1210 {
1211     return version_id == 2;
1212 }
1213 
1214 static const VMStateDescription vmstate_ac97 = {
1215     .name = "ac97",
1216     .version_id = 3,
1217     .minimum_version_id = 2,
1218     .post_load = ac97_post_load,
1219     .fields = (VMStateField[]) {
1220         VMSTATE_PCI_DEVICE (dev, AC97LinkState),
1221         VMSTATE_UINT32 (glob_cnt, AC97LinkState),
1222         VMSTATE_UINT32 (glob_sta, AC97LinkState),
1223         VMSTATE_UINT32 (cas, AC97LinkState),
1224         VMSTATE_STRUCT_ARRAY (bm_regs, AC97LinkState, 3, 1,
1225                               vmstate_ac97_bm_regs, AC97BusMasterRegs),
1226         VMSTATE_BUFFER (mixer_data, AC97LinkState),
1227         VMSTATE_UNUSED_TEST (is_version_2, 3),
1228         VMSTATE_END_OF_LIST ()
1229     }
1230 };
1231 
1232 static uint64_t nam_read(void *opaque, hwaddr addr, unsigned size)
1233 {
1234     if ((addr / size) > 256) {
1235         return -1;
1236     }
1237 
1238     switch (size) {
1239     case 1:
1240         return nam_readb(opaque, addr);
1241     case 2:
1242         return nam_readw(opaque, addr);
1243     case 4:
1244         return nam_readl(opaque, addr);
1245     default:
1246         return -1;
1247     }
1248 }
1249 
1250 static void nam_write(void *opaque, hwaddr addr, uint64_t val,
1251                       unsigned size)
1252 {
1253     if ((addr / size) > 256) {
1254         return;
1255     }
1256 
1257     switch (size) {
1258     case 1:
1259         nam_writeb(opaque, addr, val);
1260         break;
1261     case 2:
1262         nam_writew(opaque, addr, val);
1263         break;
1264     case 4:
1265         nam_writel(opaque, addr, val);
1266         break;
1267     }
1268 }
1269 
1270 static const MemoryRegionOps ac97_io_nam_ops = {
1271     .read = nam_read,
1272     .write = nam_write,
1273     .impl = {
1274         .min_access_size = 1,
1275         .max_access_size = 4,
1276     },
1277     .endianness = DEVICE_LITTLE_ENDIAN,
1278 };
1279 
1280 static uint64_t nabm_read(void *opaque, hwaddr addr, unsigned size)
1281 {
1282     if ((addr / size) > 64) {
1283         return -1;
1284     }
1285 
1286     switch (size) {
1287     case 1:
1288         return nabm_readb(opaque, addr);
1289     case 2:
1290         return nabm_readw(opaque, addr);
1291     case 4:
1292         return nabm_readl(opaque, addr);
1293     default:
1294         return -1;
1295     }
1296 }
1297 
1298 static void nabm_write(void *opaque, hwaddr addr, uint64_t val,
1299                       unsigned size)
1300 {
1301     if ((addr / size) > 64) {
1302         return;
1303     }
1304 
1305     switch (size) {
1306     case 1:
1307         nabm_writeb(opaque, addr, val);
1308         break;
1309     case 2:
1310         nabm_writew(opaque, addr, val);
1311         break;
1312     case 4:
1313         nabm_writel(opaque, addr, val);
1314         break;
1315     }
1316 }
1317 
1318 
1319 static const MemoryRegionOps ac97_io_nabm_ops = {
1320     .read = nabm_read,
1321     .write = nabm_write,
1322     .impl = {
1323         .min_access_size = 1,
1324         .max_access_size = 4,
1325     },
1326     .endianness = DEVICE_LITTLE_ENDIAN,
1327 };
1328 
1329 static void ac97_on_reset (DeviceState *dev)
1330 {
1331     AC97LinkState *s = container_of(dev, AC97LinkState, dev.qdev);
1332 
1333     reset_bm_regs (s, &s->bm_regs[0]);
1334     reset_bm_regs (s, &s->bm_regs[1]);
1335     reset_bm_regs (s, &s->bm_regs[2]);
1336 
1337     /*
1338      * Reset the mixer too. The Windows XP driver seems to rely on
1339      * this. At least it wants to read the vendor id before it resets
1340      * the codec manually.
1341      */
1342     mixer_reset (s);
1343 }
1344 
1345 static void ac97_realize(PCIDevice *dev, Error **errp)
1346 {
1347     AC97LinkState *s = AC97(dev);
1348     uint8_t *c = s->dev.config;
1349 
1350     /* TODO: no need to override */
1351     c[PCI_COMMAND] = 0x00;      /* pcicmd pci command rw, ro */
1352     c[PCI_COMMAND + 1] = 0x00;
1353 
1354     /* TODO: */
1355     c[PCI_STATUS] = PCI_STATUS_FAST_BACK;      /* pcists pci status rwc, ro */
1356     c[PCI_STATUS + 1] = PCI_STATUS_DEVSEL_MEDIUM >> 8;
1357 
1358     c[PCI_CLASS_PROG] = 0x00;      /* pi programming interface ro */
1359 
1360     /* TODO set when bar is registered. no need to override. */
1361     /* nabmar native audio mixer base address rw */
1362     c[PCI_BASE_ADDRESS_0] = PCI_BASE_ADDRESS_SPACE_IO;
1363     c[PCI_BASE_ADDRESS_0 + 1] = 0x00;
1364     c[PCI_BASE_ADDRESS_0 + 2] = 0x00;
1365     c[PCI_BASE_ADDRESS_0 + 3] = 0x00;
1366 
1367     /* TODO set when bar is registered. no need to override. */
1368       /* nabmbar native audio bus mastering base address rw */
1369     c[PCI_BASE_ADDRESS_0 + 4] = PCI_BASE_ADDRESS_SPACE_IO;
1370     c[PCI_BASE_ADDRESS_0 + 5] = 0x00;
1371     c[PCI_BASE_ADDRESS_0 + 6] = 0x00;
1372     c[PCI_BASE_ADDRESS_0 + 7] = 0x00;
1373 
1374     if (s->use_broken_id) {
1375         c[PCI_SUBSYSTEM_VENDOR_ID] = 0x86;
1376         c[PCI_SUBSYSTEM_VENDOR_ID + 1] = 0x80;
1377         c[PCI_SUBSYSTEM_ID] = 0x00;
1378         c[PCI_SUBSYSTEM_ID + 1] = 0x00;
1379     }
1380 
1381     c[PCI_INTERRUPT_LINE] = 0x00;      /* intr_ln interrupt line rw */
1382     c[PCI_INTERRUPT_PIN] = 0x01;      /* intr_pn interrupt pin ro */
1383 
1384     memory_region_init_io (&s->io_nam, OBJECT(s), &ac97_io_nam_ops, s,
1385                            "ac97-nam", 1024);
1386     memory_region_init_io (&s->io_nabm, OBJECT(s), &ac97_io_nabm_ops, s,
1387                            "ac97-nabm", 256);
1388     pci_register_bar (&s->dev, 0, PCI_BASE_ADDRESS_SPACE_IO, &s->io_nam);
1389     pci_register_bar (&s->dev, 1, PCI_BASE_ADDRESS_SPACE_IO, &s->io_nabm);
1390     AUD_register_card ("ac97", &s->card);
1391     ac97_on_reset (&s->dev.qdev);
1392 }
1393 
1394 static void ac97_exit(PCIDevice *dev)
1395 {
1396     AC97LinkState *s = AC97(dev);
1397 
1398     AUD_close_in(&s->card, s->voice_pi);
1399     AUD_close_out(&s->card, s->voice_po);
1400     AUD_close_in(&s->card, s->voice_mc);
1401     AUD_remove_card(&s->card);
1402 }
1403 
1404 static int ac97_init (PCIBus *bus)
1405 {
1406     pci_create_simple(bus, -1, TYPE_AC97);
1407     return 0;
1408 }
1409 
1410 static Property ac97_properties[] = {
1411     DEFINE_PROP_UINT32 ("use_broken_id", AC97LinkState, use_broken_id, 0),
1412     DEFINE_PROP_END_OF_LIST (),
1413 };
1414 
1415 static void ac97_class_init (ObjectClass *klass, void *data)
1416 {
1417     DeviceClass *dc = DEVICE_CLASS (klass);
1418     PCIDeviceClass *k = PCI_DEVICE_CLASS (klass);
1419 
1420     k->realize = ac97_realize;
1421     k->exit = ac97_exit;
1422     k->vendor_id = PCI_VENDOR_ID_INTEL;
1423     k->device_id = PCI_DEVICE_ID_INTEL_82801AA_5;
1424     k->revision = 0x01;
1425     k->class_id = PCI_CLASS_MULTIMEDIA_AUDIO;
1426     set_bit(DEVICE_CATEGORY_SOUND, dc->categories);
1427     dc->desc = "Intel 82801AA AC97 Audio";
1428     dc->vmsd = &vmstate_ac97;
1429     dc->props = ac97_properties;
1430     dc->reset = ac97_on_reset;
1431 }
1432 
1433 static const TypeInfo ac97_info = {
1434     .name          = TYPE_AC97,
1435     .parent        = TYPE_PCI_DEVICE,
1436     .instance_size = sizeof (AC97LinkState),
1437     .class_init    = ac97_class_init,
1438     .interfaces = (InterfaceInfo[]) {
1439         { INTERFACE_CONVENTIONAL_PCI_DEVICE },
1440         { },
1441     },
1442 };
1443 
1444 static void ac97_register_types (void)
1445 {
1446     type_register_static (&ac97_info);
1447     pci_register_soundhw("ac97", "Intel 82801AA AC97 Audio", ac97_init);
1448 }
1449 
1450 type_init (ac97_register_types)
1451