xref: /openbmc/qemu/hw/audio/ac97.c (revision 0d5fae3e)
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 
29 enum {
30     AC97_Reset                     = 0x00,
31     AC97_Master_Volume_Mute        = 0x02,
32     AC97_Headphone_Volume_Mute     = 0x04,
33     AC97_Master_Volume_Mono_Mute   = 0x06,
34     AC97_Master_Tone_RL            = 0x08,
35     AC97_PC_BEEP_Volume_Mute       = 0x0A,
36     AC97_Phone_Volume_Mute         = 0x0C,
37     AC97_Mic_Volume_Mute           = 0x0E,
38     AC97_Line_In_Volume_Mute       = 0x10,
39     AC97_CD_Volume_Mute            = 0x12,
40     AC97_Video_Volume_Mute         = 0x14,
41     AC97_Aux_Volume_Mute           = 0x16,
42     AC97_PCM_Out_Volume_Mute       = 0x18,
43     AC97_Record_Select             = 0x1A,
44     AC97_Record_Gain_Mute          = 0x1C,
45     AC97_Record_Gain_Mic_Mute      = 0x1E,
46     AC97_General_Purpose           = 0x20,
47     AC97_3D_Control                = 0x22,
48     AC97_AC_97_RESERVED            = 0x24,
49     AC97_Powerdown_Ctrl_Stat       = 0x26,
50     AC97_Extended_Audio_ID         = 0x28,
51     AC97_Extended_Audio_Ctrl_Stat  = 0x2A,
52     AC97_PCM_Front_DAC_Rate        = 0x2C,
53     AC97_PCM_Surround_DAC_Rate     = 0x2E,
54     AC97_PCM_LFE_DAC_Rate          = 0x30,
55     AC97_PCM_LR_ADC_Rate           = 0x32,
56     AC97_MIC_ADC_Rate              = 0x34,
57     AC97_6Ch_Vol_C_LFE_Mute        = 0x36,
58     AC97_6Ch_Vol_L_R_Surround_Mute = 0x38,
59     AC97_Vendor_Reserved           = 0x58,
60     AC97_Sigmatel_Analog           = 0x6c, /* We emulate a Sigmatel codec */
61     AC97_Sigmatel_Dac2Invert       = 0x6e, /* We emulate a Sigmatel codec */
62     AC97_Vendor_ID1                = 0x7c,
63     AC97_Vendor_ID2                = 0x7e
64 };
65 
66 #define SOFT_VOLUME
67 #define SR_FIFOE 16             /* rwc */
68 #define SR_BCIS  8              /* rwc */
69 #define SR_LVBCI 4              /* rwc */
70 #define SR_CELV  2              /* ro */
71 #define SR_DCH   1              /* ro */
72 #define SR_VALID_MASK ((1 << 5) - 1)
73 #define SR_WCLEAR_MASK (SR_FIFOE | SR_BCIS | SR_LVBCI)
74 #define SR_RO_MASK (SR_DCH | SR_CELV)
75 #define SR_INT_MASK (SR_FIFOE | SR_BCIS | SR_LVBCI)
76 
77 #define CR_IOCE  16             /* rw */
78 #define CR_FEIE  8              /* rw */
79 #define CR_LVBIE 4              /* rw */
80 #define CR_RR    2              /* rw */
81 #define CR_RPBM  1              /* rw */
82 #define CR_VALID_MASK ((1 << 5) - 1)
83 #define CR_DONT_CLEAR_MASK (CR_IOCE | CR_FEIE | CR_LVBIE)
84 
85 #define GC_WR    4              /* rw */
86 #define GC_CR    2              /* rw */
87 #define GC_VALID_MASK ((1 << 6) - 1)
88 
89 #define GS_MD3   (1<<17)        /* rw */
90 #define GS_AD3   (1<<16)        /* rw */
91 #define GS_RCS   (1<<15)        /* rwc */
92 #define GS_B3S12 (1<<14)        /* ro */
93 #define GS_B2S12 (1<<13)        /* ro */
94 #define GS_B1S12 (1<<12)        /* ro */
95 #define GS_S1R1  (1<<11)        /* rwc */
96 #define GS_S0R1  (1<<10)        /* rwc */
97 #define GS_S1CR  (1<<9)         /* ro */
98 #define GS_S0CR  (1<<8)         /* ro */
99 #define GS_MINT  (1<<7)         /* ro */
100 #define GS_POINT (1<<6)         /* ro */
101 #define GS_PIINT (1<<5)         /* ro */
102 #define GS_RSRVD ((1<<4)|(1<<3))
103 #define GS_MOINT (1<<2)         /* ro */
104 #define GS_MIINT (1<<1)         /* ro */
105 #define GS_GSCI  1              /* rwc */
106 #define GS_RO_MASK (GS_B3S12|                   \
107                     GS_B2S12|                   \
108                     GS_B1S12|                   \
109                     GS_S1CR|                    \
110                     GS_S0CR|                    \
111                     GS_MINT|                    \
112                     GS_POINT|                   \
113                     GS_PIINT|                   \
114                     GS_RSRVD|                   \
115                     GS_MOINT|                   \
116                     GS_MIINT)
117 #define GS_VALID_MASK ((1 << 18) - 1)
118 #define GS_WCLEAR_MASK (GS_RCS|GS_S1R1|GS_S0R1|GS_GSCI)
119 
120 #define BD_IOC (1<<31)
121 #define BD_BUP (1<<30)
122 
123 #define EACS_VRA 1
124 #define EACS_VRM 8
125 
126 #define MUTE_SHIFT 15
127 
128 #define TYPE_AC97 "AC97"
129 #define AC97(obj) \
130     OBJECT_CHECK(AC97LinkState, (obj), TYPE_AC97)
131 
132 #define REC_MASK 7
133 enum {
134     REC_MIC = 0,
135     REC_CD,
136     REC_VIDEO,
137     REC_AUX,
138     REC_LINE_IN,
139     REC_STEREO_MIX,
140     REC_MONO_MIX,
141     REC_PHONE
142 };
143 
144 typedef struct BD {
145     uint32_t addr;
146     uint32_t ctl_len;
147 } BD;
148 
149 typedef struct AC97BusMasterRegs {
150     uint32_t bdbar;             /* rw 0 */
151     uint8_t civ;                /* ro 0 */
152     uint8_t lvi;                /* rw 0 */
153     uint16_t sr;                /* rw 1 */
154     uint16_t picb;              /* ro 0 */
155     uint8_t piv;                /* ro 0 */
156     uint8_t cr;                 /* rw 0 */
157     unsigned int bd_valid;
158     BD bd;
159 } AC97BusMasterRegs;
160 
161 typedef struct AC97LinkState {
162     PCIDevice dev;
163     QEMUSoundCard card;
164     uint32_t use_broken_id;
165     uint32_t glob_cnt;
166     uint32_t glob_sta;
167     uint32_t cas;
168     uint32_t last_samp;
169     AC97BusMasterRegs bm_regs[3];
170     uint8_t mixer_data[256];
171     SWVoiceIn *voice_pi;
172     SWVoiceOut *voice_po;
173     SWVoiceIn *voice_mc;
174     int invalid_freq[3];
175     uint8_t silence[128];
176     int bup_flag;
177     MemoryRegion io_nam;
178     MemoryRegion io_nabm;
179 } AC97LinkState;
180 
181 enum {
182     BUP_SET = 1,
183     BUP_LAST = 2
184 };
185 
186 #ifdef DEBUG_AC97
187 #define dolog(...) AUD_log ("ac97", __VA_ARGS__)
188 #else
189 #define dolog(...)
190 #endif
191 
192 #define MKREGS(prefix, start)                   \
193 enum {                                          \
194     prefix ## _BDBAR = start,                   \
195     prefix ## _CIV = start + 4,                 \
196     prefix ## _LVI = start + 5,                 \
197     prefix ## _SR = start + 6,                  \
198     prefix ## _PICB = start + 8,                \
199     prefix ## _PIV = start + 10,                \
200     prefix ## _CR = start + 11                  \
201 }
202 
203 enum {
204     PI_INDEX = 0,
205     PO_INDEX,
206     MC_INDEX,
207     LAST_INDEX
208 };
209 
210 MKREGS (PI, PI_INDEX * 16);
211 MKREGS (PO, PO_INDEX * 16);
212 MKREGS (MC, MC_INDEX * 16);
213 
214 enum {
215     GLOB_CNT = 0x2c,
216     GLOB_STA = 0x30,
217     CAS      = 0x34
218 };
219 
220 #define GET_BM(index) (((index) >> 4) & 3)
221 
222 static void po_callback (void *opaque, int free);
223 static void pi_callback (void *opaque, int avail);
224 static void mc_callback (void *opaque, int avail);
225 
226 static void warm_reset (AC97LinkState *s)
227 {
228     (void) s;
229 }
230 
231 static void cold_reset (AC97LinkState * s)
232 {
233     (void) s;
234 }
235 
236 static void fetch_bd (AC97LinkState *s, AC97BusMasterRegs *r)
237 {
238     uint8_t b[8];
239 
240     pci_dma_read (&s->dev, r->bdbar + r->civ * 8, b, 8);
241     r->bd_valid = 1;
242     r->bd.addr = le32_to_cpu (*(uint32_t *) &b[0]) & ~3;
243     r->bd.ctl_len = le32_to_cpu (*(uint32_t *) &b[4]);
244     r->picb = r->bd.ctl_len & 0xffff;
245     dolog ("bd %2d addr=%#x ctl=%#06x len=%#x(%d bytes)\n",
246            r->civ, r->bd.addr, r->bd.ctl_len >> 16,
247            r->bd.ctl_len & 0xffff,
248            (r->bd.ctl_len & 0xffff) << 1);
249 }
250 
251 static void update_sr (AC97LinkState *s, AC97BusMasterRegs *r, uint32_t new_sr)
252 {
253     int event = 0;
254     int level = 0;
255     uint32_t new_mask = new_sr & SR_INT_MASK;
256     uint32_t old_mask = r->sr & SR_INT_MASK;
257     uint32_t masks[] = {GS_PIINT, GS_POINT, GS_MINT};
258 
259     if (new_mask ^ old_mask) {
260         /** @todo is IRQ deasserted when only one of status bits is cleared? */
261         if (!new_mask) {
262             event = 1;
263             level = 0;
264         }
265         else {
266             if ((new_mask & SR_LVBCI) && (r->cr & CR_LVBIE)) {
267                 event = 1;
268                 level = 1;
269             }
270             if ((new_mask & SR_BCIS) && (r->cr & CR_IOCE)) {
271                 event = 1;
272                 level = 1;
273             }
274         }
275     }
276 
277     r->sr = new_sr;
278 
279     dolog ("IOC%d LVB%d sr=%#x event=%d level=%d\n",
280            r->sr & SR_BCIS, r->sr & SR_LVBCI,
281            r->sr,
282            event, level);
283 
284     if (!event)
285         return;
286 
287     if (level) {
288         s->glob_sta |= masks[r - s->bm_regs];
289         dolog ("set irq level=1\n");
290         pci_irq_assert(&s->dev);
291     }
292     else {
293         s->glob_sta &= ~masks[r - s->bm_regs];
294         dolog ("set irq level=0\n");
295         pci_irq_deassert(&s->dev);
296     }
297 }
298 
299 static void voice_set_active (AC97LinkState *s, int bm_index, int on)
300 {
301     switch (bm_index) {
302     case PI_INDEX:
303         AUD_set_active_in (s->voice_pi, on);
304         break;
305 
306     case PO_INDEX:
307         AUD_set_active_out (s->voice_po, on);
308         break;
309 
310     case MC_INDEX:
311         AUD_set_active_in (s->voice_mc, on);
312         break;
313 
314     default:
315         AUD_log ("ac97", "invalid bm_index(%d) in voice_set_active", bm_index);
316         break;
317     }
318 }
319 
320 static void reset_bm_regs (AC97LinkState *s, AC97BusMasterRegs *r)
321 {
322     dolog ("reset_bm_regs\n");
323     r->bdbar = 0;
324     r->civ = 0;
325     r->lvi = 0;
326     /** todo do we need to do that? */
327     update_sr (s, r, SR_DCH);
328     r->picb = 0;
329     r->piv = 0;
330     r->cr = r->cr & CR_DONT_CLEAR_MASK;
331     r->bd_valid = 0;
332 
333     voice_set_active (s, r - s->bm_regs, 0);
334     memset (s->silence, 0, sizeof (s->silence));
335 }
336 
337 static void mixer_store (AC97LinkState *s, uint32_t i, uint16_t v)
338 {
339     if (i + 2 > sizeof (s->mixer_data)) {
340         dolog ("mixer_store: index %d out of bounds %zd\n",
341                i, sizeof (s->mixer_data));
342         return;
343     }
344 
345     s->mixer_data[i + 0] = v & 0xff;
346     s->mixer_data[i + 1] = v >> 8;
347 }
348 
349 static uint16_t mixer_load (AC97LinkState *s, uint32_t i)
350 {
351     uint16_t val = 0xffff;
352 
353     if (i + 2 > sizeof (s->mixer_data)) {
354         dolog ("mixer_load: index %d out of bounds %zd\n",
355                i, sizeof (s->mixer_data));
356     }
357     else {
358         val = s->mixer_data[i + 0] | (s->mixer_data[i + 1] << 8);
359     }
360 
361     return val;
362 }
363 
364 static void open_voice (AC97LinkState *s, int index, int freq)
365 {
366     struct audsettings as;
367 
368     as.freq = freq;
369     as.nchannels = 2;
370     as.fmt = AUDIO_FORMAT_S16;
371     as.endianness = 0;
372 
373     if (freq > 0) {
374         s->invalid_freq[index] = 0;
375         switch (index) {
376         case PI_INDEX:
377             s->voice_pi = AUD_open_in (
378                 &s->card,
379                 s->voice_pi,
380                 "ac97.pi",
381                 s,
382                 pi_callback,
383                 &as
384                 );
385             break;
386 
387         case PO_INDEX:
388             s->voice_po = AUD_open_out (
389                 &s->card,
390                 s->voice_po,
391                 "ac97.po",
392                 s,
393                 po_callback,
394                 &as
395                 );
396             break;
397 
398         case MC_INDEX:
399             s->voice_mc = AUD_open_in (
400                 &s->card,
401                 s->voice_mc,
402                 "ac97.mc",
403                 s,
404                 mc_callback,
405                 &as
406                 );
407             break;
408         }
409     }
410     else {
411         s->invalid_freq[index] = freq;
412         switch (index) {
413         case PI_INDEX:
414             AUD_close_in (&s->card, s->voice_pi);
415             s->voice_pi = NULL;
416             break;
417 
418         case PO_INDEX:
419             AUD_close_out (&s->card, s->voice_po);
420             s->voice_po = NULL;
421             break;
422 
423         case MC_INDEX:
424             AUD_close_in (&s->card, s->voice_mc);
425             s->voice_mc = NULL;
426             break;
427         }
428     }
429 }
430 
431 static void reset_voices (AC97LinkState *s, uint8_t active[LAST_INDEX])
432 {
433     uint16_t freq;
434 
435     freq = mixer_load (s, AC97_PCM_LR_ADC_Rate);
436     open_voice (s, PI_INDEX, freq);
437     AUD_set_active_in (s->voice_pi, active[PI_INDEX]);
438 
439     freq = mixer_load (s, AC97_PCM_Front_DAC_Rate);
440     open_voice (s, PO_INDEX, freq);
441     AUD_set_active_out (s->voice_po, active[PO_INDEX]);
442 
443     freq = mixer_load (s, AC97_MIC_ADC_Rate);
444     open_voice (s, MC_INDEX, freq);
445     AUD_set_active_in (s->voice_mc, active[MC_INDEX]);
446 }
447 
448 static void get_volume (uint16_t vol, uint16_t mask, int inverse,
449                         int *mute, uint8_t *lvol, uint8_t *rvol)
450 {
451     *mute = (vol >> MUTE_SHIFT) & 1;
452     *rvol = (255 * (vol & mask)) / mask;
453     *lvol = (255 * ((vol >> 8) & mask)) / mask;
454 
455     if (inverse) {
456         *rvol = 255 - *rvol;
457         *lvol = 255 - *lvol;
458     }
459 }
460 
461 static void update_combined_volume_out (AC97LinkState *s)
462 {
463     uint8_t lvol, rvol, plvol, prvol;
464     int mute, pmute;
465 
466     get_volume (mixer_load (s, AC97_Master_Volume_Mute), 0x3f, 1,
467                 &mute, &lvol, &rvol);
468     get_volume (mixer_load (s, AC97_PCM_Out_Volume_Mute), 0x1f, 1,
469                 &pmute, &plvol, &prvol);
470 
471     mute = mute | pmute;
472     lvol = (lvol * plvol) / 255;
473     rvol = (rvol * prvol) / 255;
474 
475     AUD_set_volume_out (s->voice_po, mute, lvol, rvol);
476 }
477 
478 static void update_volume_in (AC97LinkState *s)
479 {
480     uint8_t lvol, rvol;
481     int mute;
482 
483     get_volume (mixer_load (s, AC97_Record_Gain_Mute), 0x0f, 0,
484                 &mute, &lvol, &rvol);
485 
486     AUD_set_volume_in (s->voice_pi, mute, lvol, rvol);
487 }
488 
489 static void set_volume (AC97LinkState *s, int index, uint32_t val)
490 {
491     switch (index) {
492     case AC97_Master_Volume_Mute:
493         val &= 0xbf3f;
494         mixer_store (s, index, val);
495         update_combined_volume_out (s);
496         break;
497     case AC97_PCM_Out_Volume_Mute:
498         val &= 0x9f1f;
499         mixer_store (s, index, val);
500         update_combined_volume_out (s);
501         break;
502     case AC97_Record_Gain_Mute:
503         val &= 0x8f0f;
504         mixer_store (s, index, val);
505         update_volume_in (s);
506         break;
507     }
508 }
509 
510 static void record_select (AC97LinkState *s, uint32_t val)
511 {
512     uint8_t rs = val & REC_MASK;
513     uint8_t ls = (val >> 8) & REC_MASK;
514     mixer_store (s, AC97_Record_Select, rs | (ls << 8));
515 }
516 
517 static void mixer_reset (AC97LinkState *s)
518 {
519     uint8_t active[LAST_INDEX];
520 
521     dolog ("mixer_reset\n");
522     memset (s->mixer_data, 0, sizeof (s->mixer_data));
523     memset (active, 0, sizeof (active));
524     mixer_store (s, AC97_Reset                   , 0x0000); /* 6940 */
525     mixer_store (s, AC97_Headphone_Volume_Mute   , 0x0000);
526     mixer_store (s, AC97_Master_Volume_Mono_Mute , 0x0000);
527     mixer_store (s, AC97_Master_Tone_RL,           0x0000);
528     mixer_store (s, AC97_PC_BEEP_Volume_Mute     , 0x0000);
529     mixer_store (s, AC97_Phone_Volume_Mute       , 0x0000);
530     mixer_store (s, AC97_Mic_Volume_Mute         , 0x0000);
531     mixer_store (s, AC97_Line_In_Volume_Mute     , 0x0000);
532     mixer_store (s, AC97_CD_Volume_Mute          , 0x0000);
533     mixer_store (s, AC97_Video_Volume_Mute       , 0x0000);
534     mixer_store (s, AC97_Aux_Volume_Mute         , 0x0000);
535     mixer_store (s, AC97_Record_Gain_Mic_Mute    , 0x0000);
536     mixer_store (s, AC97_General_Purpose         , 0x0000);
537     mixer_store (s, AC97_3D_Control              , 0x0000);
538     mixer_store (s, AC97_Powerdown_Ctrl_Stat     , 0x000f);
539 
540     /*
541      * Sigmatel 9700 (STAC9700)
542      */
543     mixer_store (s, AC97_Vendor_ID1              , 0x8384);
544     mixer_store (s, AC97_Vendor_ID2              , 0x7600); /* 7608 */
545 
546     mixer_store (s, AC97_Extended_Audio_ID       , 0x0809);
547     mixer_store (s, AC97_Extended_Audio_Ctrl_Stat, 0x0009);
548     mixer_store (s, AC97_PCM_Front_DAC_Rate      , 0xbb80);
549     mixer_store (s, AC97_PCM_Surround_DAC_Rate   , 0xbb80);
550     mixer_store (s, AC97_PCM_LFE_DAC_Rate        , 0xbb80);
551     mixer_store (s, AC97_PCM_LR_ADC_Rate         , 0xbb80);
552     mixer_store (s, AC97_MIC_ADC_Rate            , 0xbb80);
553 
554     record_select (s, 0);
555     set_volume (s, AC97_Master_Volume_Mute, 0x8000);
556     set_volume (s, AC97_PCM_Out_Volume_Mute, 0x8808);
557     set_volume (s, AC97_Record_Gain_Mute, 0x8808);
558 
559     reset_voices (s, active);
560 }
561 
562 /**
563  * Native audio mixer
564  * I/O Reads
565  */
566 static uint32_t nam_readb (void *opaque, uint32_t addr)
567 {
568     AC97LinkState *s = opaque;
569     dolog ("U nam readb %#x\n", addr);
570     s->cas = 0;
571     return ~0U;
572 }
573 
574 static uint32_t nam_readw (void *opaque, uint32_t addr)
575 {
576     AC97LinkState *s = opaque;
577     uint32_t val = ~0U;
578     uint32_t index = addr;
579     s->cas = 0;
580     val = mixer_load (s, index);
581     return val;
582 }
583 
584 static uint32_t nam_readl (void *opaque, uint32_t addr)
585 {
586     AC97LinkState *s = opaque;
587     dolog ("U nam readl %#x\n", addr);
588     s->cas = 0;
589     return ~0U;
590 }
591 
592 /**
593  * Native audio mixer
594  * I/O Writes
595  */
596 static void nam_writeb (void *opaque, uint32_t addr, uint32_t val)
597 {
598     AC97LinkState *s = opaque;
599     dolog ("U nam writeb %#x <- %#x\n", addr, val);
600     s->cas = 0;
601 }
602 
603 static void nam_writew (void *opaque, uint32_t addr, uint32_t val)
604 {
605     AC97LinkState *s = opaque;
606     uint32_t index = addr;
607     s->cas = 0;
608     switch (index) {
609     case AC97_Reset:
610         mixer_reset (s);
611         break;
612     case AC97_Powerdown_Ctrl_Stat:
613         val &= ~0x800f;
614         val |= mixer_load (s, index) & 0xf;
615         mixer_store (s, index, val);
616         break;
617     case AC97_PCM_Out_Volume_Mute:
618     case AC97_Master_Volume_Mute:
619     case AC97_Record_Gain_Mute:
620         set_volume (s, index, val);
621         break;
622     case AC97_Record_Select:
623         record_select (s, val);
624         break;
625     case AC97_Vendor_ID1:
626     case AC97_Vendor_ID2:
627         dolog ("Attempt to write vendor ID to %#x\n", val);
628         break;
629     case AC97_Extended_Audio_ID:
630         dolog ("Attempt to write extended audio ID to %#x\n", val);
631         break;
632     case AC97_Extended_Audio_Ctrl_Stat:
633         if (!(val & EACS_VRA)) {
634             mixer_store (s, AC97_PCM_Front_DAC_Rate, 0xbb80);
635             mixer_store (s, AC97_PCM_LR_ADC_Rate,    0xbb80);
636             open_voice (s, PI_INDEX, 48000);
637             open_voice (s, PO_INDEX, 48000);
638         }
639         if (!(val & EACS_VRM)) {
640             mixer_store (s, AC97_MIC_ADC_Rate, 0xbb80);
641             open_voice (s, MC_INDEX, 48000);
642         }
643         dolog ("Setting extended audio control to %#x\n", val);
644         mixer_store (s, AC97_Extended_Audio_Ctrl_Stat, val);
645         break;
646     case AC97_PCM_Front_DAC_Rate:
647         if (mixer_load (s, AC97_Extended_Audio_Ctrl_Stat) & EACS_VRA) {
648             mixer_store (s, index, val);
649             dolog ("Set front DAC rate to %d\n", val);
650             open_voice (s, PO_INDEX, val);
651         }
652         else {
653             dolog ("Attempt to set front DAC rate to %d, "
654                    "but VRA is not set\n",
655                    val);
656         }
657         break;
658     case AC97_MIC_ADC_Rate:
659         if (mixer_load (s, AC97_Extended_Audio_Ctrl_Stat) & EACS_VRM) {
660             mixer_store (s, index, val);
661             dolog ("Set MIC ADC rate to %d\n", val);
662             open_voice (s, MC_INDEX, val);
663         }
664         else {
665             dolog ("Attempt to set MIC ADC rate to %d, "
666                    "but VRM is not set\n",
667                    val);
668         }
669         break;
670     case AC97_PCM_LR_ADC_Rate:
671         if (mixer_load (s, AC97_Extended_Audio_Ctrl_Stat) & EACS_VRA) {
672             mixer_store (s, index, val);
673             dolog ("Set front LR ADC rate to %d\n", val);
674             open_voice (s, PI_INDEX, val);
675         }
676         else {
677             dolog ("Attempt to set LR ADC rate to %d, but VRA is not set\n",
678                     val);
679         }
680         break;
681     case AC97_Headphone_Volume_Mute:
682     case AC97_Master_Volume_Mono_Mute:
683     case AC97_Master_Tone_RL:
684     case AC97_PC_BEEP_Volume_Mute:
685     case AC97_Phone_Volume_Mute:
686     case AC97_Mic_Volume_Mute:
687     case AC97_Line_In_Volume_Mute:
688     case AC97_CD_Volume_Mute:
689     case AC97_Video_Volume_Mute:
690     case AC97_Aux_Volume_Mute:
691     case AC97_Record_Gain_Mic_Mute:
692     case AC97_General_Purpose:
693     case AC97_3D_Control:
694     case AC97_Sigmatel_Analog:
695     case AC97_Sigmatel_Dac2Invert:
696         /* None of the features in these regs are emulated, so they are RO */
697         break;
698     default:
699         dolog ("U nam writew %#x <- %#x\n", addr, val);
700         mixer_store (s, index, val);
701         break;
702     }
703 }
704 
705 static void nam_writel (void *opaque, uint32_t addr, uint32_t val)
706 {
707     AC97LinkState *s = opaque;
708     dolog ("U nam writel %#x <- %#x\n", addr, val);
709     s->cas = 0;
710 }
711 
712 /**
713  * Native audio bus master
714  * I/O Reads
715  */
716 static uint32_t nabm_readb (void *opaque, uint32_t addr)
717 {
718     AC97LinkState *s = opaque;
719     AC97BusMasterRegs *r = NULL;
720     uint32_t index = addr;
721     uint32_t val = ~0U;
722 
723     switch (index) {
724     case CAS:
725         dolog ("CAS %d\n", s->cas);
726         val = s->cas;
727         s->cas = 1;
728         break;
729     case PI_CIV:
730     case PO_CIV:
731     case MC_CIV:
732         r = &s->bm_regs[GET_BM (index)];
733         val = r->civ;
734         dolog ("CIV[%d] -> %#x\n", GET_BM (index), val);
735         break;
736     case PI_LVI:
737     case PO_LVI:
738     case MC_LVI:
739         r = &s->bm_regs[GET_BM (index)];
740         val = r->lvi;
741         dolog ("LVI[%d] -> %#x\n", GET_BM (index), val);
742         break;
743     case PI_PIV:
744     case PO_PIV:
745     case MC_PIV:
746         r = &s->bm_regs[GET_BM (index)];
747         val = r->piv;
748         dolog ("PIV[%d] -> %#x\n", GET_BM (index), val);
749         break;
750     case PI_CR:
751     case PO_CR:
752     case MC_CR:
753         r = &s->bm_regs[GET_BM (index)];
754         val = r->cr;
755         dolog ("CR[%d] -> %#x\n", GET_BM (index), val);
756         break;
757     case PI_SR:
758     case PO_SR:
759     case MC_SR:
760         r = &s->bm_regs[GET_BM (index)];
761         val = r->sr & 0xff;
762         dolog ("SRb[%d] -> %#x\n", GET_BM (index), val);
763         break;
764     default:
765         dolog ("U nabm readb %#x -> %#x\n", addr, val);
766         break;
767     }
768     return val;
769 }
770 
771 static uint32_t nabm_readw (void *opaque, uint32_t addr)
772 {
773     AC97LinkState *s = opaque;
774     AC97BusMasterRegs *r = NULL;
775     uint32_t index = addr;
776     uint32_t val = ~0U;
777 
778     switch (index) {
779     case PI_SR:
780     case PO_SR:
781     case MC_SR:
782         r = &s->bm_regs[GET_BM (index)];
783         val = r->sr;
784         dolog ("SR[%d] -> %#x\n", GET_BM (index), val);
785         break;
786     case PI_PICB:
787     case PO_PICB:
788     case MC_PICB:
789         r = &s->bm_regs[GET_BM (index)];
790         val = r->picb;
791         dolog ("PICB[%d] -> %#x\n", GET_BM (index), val);
792         break;
793     default:
794         dolog ("U nabm readw %#x -> %#x\n", addr, val);
795         break;
796     }
797     return val;
798 }
799 
800 static uint32_t nabm_readl (void *opaque, uint32_t addr)
801 {
802     AC97LinkState *s = opaque;
803     AC97BusMasterRegs *r = NULL;
804     uint32_t index = addr;
805     uint32_t val = ~0U;
806 
807     switch (index) {
808     case PI_BDBAR:
809     case PO_BDBAR:
810     case MC_BDBAR:
811         r = &s->bm_regs[GET_BM (index)];
812         val = r->bdbar;
813         dolog ("BMADDR[%d] -> %#x\n", GET_BM (index), val);
814         break;
815     case PI_CIV:
816     case PO_CIV:
817     case MC_CIV:
818         r = &s->bm_regs[GET_BM (index)];
819         val = r->civ | (r->lvi << 8) | (r->sr << 16);
820         dolog ("CIV LVI SR[%d] -> %#x, %#x, %#x\n", GET_BM (index),
821                r->civ, r->lvi, r->sr);
822         break;
823     case PI_PICB:
824     case PO_PICB:
825     case MC_PICB:
826         r = &s->bm_regs[GET_BM (index)];
827         val = r->picb | (r->piv << 16) | (r->cr << 24);
828         dolog ("PICB PIV CR[%d] -> %#x %#x %#x %#x\n", GET_BM (index),
829                val, r->picb, r->piv, r->cr);
830         break;
831     case GLOB_CNT:
832         val = s->glob_cnt;
833         dolog ("glob_cnt -> %#x\n", val);
834         break;
835     case GLOB_STA:
836         val = s->glob_sta | GS_S0CR;
837         dolog ("glob_sta -> %#x\n", val);
838         break;
839     default:
840         dolog ("U nabm readl %#x -> %#x\n", addr, val);
841         break;
842     }
843     return val;
844 }
845 
846 /**
847  * Native audio bus master
848  * I/O Writes
849  */
850 static void nabm_writeb (void *opaque, uint32_t addr, uint32_t val)
851 {
852     AC97LinkState *s = opaque;
853     AC97BusMasterRegs *r = NULL;
854     uint32_t index = addr;
855     switch (index) {
856     case PI_LVI:
857     case PO_LVI:
858     case MC_LVI:
859         r = &s->bm_regs[GET_BM (index)];
860         if ((r->cr & CR_RPBM) && (r->sr & SR_DCH)) {
861             r->sr &= ~(SR_DCH | SR_CELV);
862             r->civ = r->piv;
863             r->piv = (r->piv + 1) % 32;
864             fetch_bd (s, r);
865         }
866         r->lvi = val % 32;
867         dolog ("LVI[%d] <- %#x\n", GET_BM (index), val);
868         break;
869     case PI_CR:
870     case PO_CR:
871     case MC_CR:
872         r = &s->bm_regs[GET_BM (index)];
873         if (val & CR_RR) {
874             reset_bm_regs (s, r);
875         }
876         else {
877             r->cr = val & CR_VALID_MASK;
878             if (!(r->cr & CR_RPBM)) {
879                 voice_set_active (s, r - s->bm_regs, 0);
880                 r->sr |= SR_DCH;
881             }
882             else {
883                 r->civ = r->piv;
884                 r->piv = (r->piv + 1) % 32;
885                 fetch_bd (s, r);
886                 r->sr &= ~SR_DCH;
887                 voice_set_active (s, r - s->bm_regs, 1);
888             }
889         }
890         dolog ("CR[%d] <- %#x (cr %#x)\n", GET_BM (index), val, r->cr);
891         break;
892     case PI_SR:
893     case PO_SR:
894     case MC_SR:
895         r = &s->bm_regs[GET_BM (index)];
896         r->sr |= val & ~(SR_RO_MASK | SR_WCLEAR_MASK);
897         update_sr (s, r, r->sr & ~(val & SR_WCLEAR_MASK));
898         dolog ("SR[%d] <- %#x (sr %#x)\n", GET_BM (index), val, r->sr);
899         break;
900     default:
901         dolog ("U nabm writeb %#x <- %#x\n", addr, val);
902         break;
903     }
904 }
905 
906 static void nabm_writew (void *opaque, uint32_t addr, uint32_t val)
907 {
908     AC97LinkState *s = opaque;
909     AC97BusMasterRegs *r = NULL;
910     uint32_t index = addr;
911     switch (index) {
912     case PI_SR:
913     case PO_SR:
914     case MC_SR:
915         r = &s->bm_regs[GET_BM (index)];
916         r->sr |= val & ~(SR_RO_MASK | SR_WCLEAR_MASK);
917         update_sr (s, r, r->sr & ~(val & SR_WCLEAR_MASK));
918         dolog ("SR[%d] <- %#x (sr %#x)\n", GET_BM (index), val, r->sr);
919         break;
920     default:
921         dolog ("U nabm writew %#x <- %#x\n", addr, val);
922         break;
923     }
924 }
925 
926 static void nabm_writel (void *opaque, uint32_t addr, uint32_t val)
927 {
928     AC97LinkState *s = opaque;
929     AC97BusMasterRegs *r = NULL;
930     uint32_t index = addr;
931     switch (index) {
932     case PI_BDBAR:
933     case PO_BDBAR:
934     case MC_BDBAR:
935         r = &s->bm_regs[GET_BM (index)];
936         r->bdbar = val & ~3;
937         dolog ("BDBAR[%d] <- %#x (bdbar %#x)\n",
938                GET_BM (index), val, r->bdbar);
939         break;
940     case GLOB_CNT:
941         if (val & GC_WR)
942             warm_reset (s);
943         if (val & GC_CR)
944             cold_reset (s);
945         if (!(val & (GC_WR | GC_CR)))
946             s->glob_cnt = val & GC_VALID_MASK;
947         dolog ("glob_cnt <- %#x (glob_cnt %#x)\n", val, s->glob_cnt);
948         break;
949     case GLOB_STA:
950         s->glob_sta &= ~(val & GS_WCLEAR_MASK);
951         s->glob_sta |= (val & ~(GS_WCLEAR_MASK | GS_RO_MASK)) & GS_VALID_MASK;
952         dolog ("glob_sta <- %#x (glob_sta %#x)\n", val, s->glob_sta);
953         break;
954     default:
955         dolog ("U nabm writel %#x <- %#x\n", addr, val);
956         break;
957     }
958 }
959 
960 static int write_audio (AC97LinkState *s, AC97BusMasterRegs *r,
961                         int max, int *stop)
962 {
963     uint8_t tmpbuf[4096];
964     uint32_t addr = r->bd.addr;
965     uint32_t temp = r->picb << 1;
966     uint32_t written = 0;
967     int to_copy = 0;
968     temp = MIN (temp, max);
969 
970     if (!temp) {
971         *stop = 1;
972         return 0;
973     }
974 
975     while (temp) {
976         int copied;
977         to_copy = MIN (temp, sizeof (tmpbuf));
978         pci_dma_read (&s->dev, addr, tmpbuf, to_copy);
979         copied = AUD_write (s->voice_po, tmpbuf, to_copy);
980         dolog ("write_audio max=%x to_copy=%x copied=%x\n",
981                max, to_copy, copied);
982         if (!copied) {
983             *stop = 1;
984             break;
985         }
986         temp -= copied;
987         addr += copied;
988         written += copied;
989     }
990 
991     if (!temp) {
992         if (to_copy < 4) {
993             dolog ("whoops\n");
994             s->last_samp = 0;
995         }
996         else {
997             s->last_samp = *(uint32_t *) &tmpbuf[to_copy - 4];
998         }
999     }
1000 
1001     r->bd.addr = addr;
1002     return written;
1003 }
1004 
1005 static void write_bup (AC97LinkState *s, int elapsed)
1006 {
1007     dolog ("write_bup\n");
1008     if (!(s->bup_flag & BUP_SET)) {
1009         if (s->bup_flag & BUP_LAST) {
1010             int i;
1011             uint8_t *p = s->silence;
1012             for (i = 0; i < sizeof (s->silence) / 4; i++, p += 4) {
1013                 *(uint32_t *) p = s->last_samp;
1014             }
1015         }
1016         else {
1017             memset (s->silence, 0, sizeof (s->silence));
1018         }
1019         s->bup_flag |= BUP_SET;
1020     }
1021 
1022     while (elapsed) {
1023         int temp = MIN (elapsed, sizeof (s->silence));
1024         while (temp) {
1025             int copied = AUD_write (s->voice_po, s->silence, temp);
1026             if (!copied)
1027                 return;
1028             temp -= copied;
1029             elapsed -= copied;
1030         }
1031     }
1032 }
1033 
1034 static int read_audio (AC97LinkState *s, AC97BusMasterRegs *r,
1035                        int max, int *stop)
1036 {
1037     uint8_t tmpbuf[4096];
1038     uint32_t addr = r->bd.addr;
1039     uint32_t temp = r->picb << 1;
1040     uint32_t nread = 0;
1041     int to_copy = 0;
1042     SWVoiceIn *voice = (r - s->bm_regs) == MC_INDEX ? s->voice_mc : s->voice_pi;
1043 
1044     temp = MIN (temp, max);
1045 
1046     if (!temp) {
1047         *stop = 1;
1048         return 0;
1049     }
1050 
1051     while (temp) {
1052         int acquired;
1053         to_copy = MIN (temp, sizeof (tmpbuf));
1054         acquired = AUD_read (voice, tmpbuf, to_copy);
1055         if (!acquired) {
1056             *stop = 1;
1057             break;
1058         }
1059         pci_dma_write (&s->dev, addr, tmpbuf, acquired);
1060         temp -= acquired;
1061         addr += acquired;
1062         nread += acquired;
1063     }
1064 
1065     r->bd.addr = addr;
1066     return nread;
1067 }
1068 
1069 static void transfer_audio (AC97LinkState *s, int index, int elapsed)
1070 {
1071     AC97BusMasterRegs *r = &s->bm_regs[index];
1072     int stop = 0;
1073 
1074     if (s->invalid_freq[index]) {
1075         AUD_log ("ac97", "attempt to use voice %d with invalid frequency %d\n",
1076                  index, s->invalid_freq[index]);
1077         return;
1078     }
1079 
1080     if (r->sr & SR_DCH) {
1081         if (r->cr & CR_RPBM) {
1082             switch (index) {
1083             case PO_INDEX:
1084                 write_bup (s, elapsed);
1085                 break;
1086             }
1087         }
1088         return;
1089     }
1090 
1091     while ((elapsed >> 1) && !stop) {
1092         int temp;
1093 
1094         if (!r->bd_valid) {
1095             dolog ("invalid bd\n");
1096             fetch_bd (s, r);
1097         }
1098 
1099         if (!r->picb) {
1100             dolog ("fresh bd %d is empty %#x %#x\n",
1101                    r->civ, r->bd.addr, r->bd.ctl_len);
1102             if (r->civ == r->lvi) {
1103                 r->sr |= SR_DCH; /* CELV? */
1104                 s->bup_flag = 0;
1105                 break;
1106             }
1107             r->sr &= ~SR_CELV;
1108             r->civ = r->piv;
1109             r->piv = (r->piv + 1) % 32;
1110             fetch_bd (s, r);
1111             return;
1112         }
1113 
1114         switch (index) {
1115         case PO_INDEX:
1116             temp = write_audio (s, r, elapsed, &stop);
1117             elapsed -= temp;
1118             r->picb -= (temp >> 1);
1119             break;
1120 
1121         case PI_INDEX:
1122         case MC_INDEX:
1123             temp = read_audio (s, r, elapsed, &stop);
1124             elapsed -= temp;
1125             r->picb -= (temp >> 1);
1126             break;
1127         }
1128 
1129         if (!r->picb) {
1130             uint32_t new_sr = r->sr & ~SR_CELV;
1131 
1132             if (r->bd.ctl_len & BD_IOC) {
1133                 new_sr |= SR_BCIS;
1134             }
1135 
1136             if (r->civ == r->lvi) {
1137                 dolog ("Underrun civ (%d) == lvi (%d)\n", r->civ, r->lvi);
1138 
1139                 new_sr |= SR_LVBCI | SR_DCH | SR_CELV;
1140                 stop = 1;
1141                 s->bup_flag = (r->bd.ctl_len & BD_BUP) ? BUP_LAST : 0;
1142             }
1143             else {
1144                 r->civ = r->piv;
1145                 r->piv = (r->piv + 1) % 32;
1146                 fetch_bd (s, r);
1147             }
1148 
1149             update_sr (s, r, new_sr);
1150         }
1151     }
1152 }
1153 
1154 static void pi_callback (void *opaque, int avail)
1155 {
1156     transfer_audio (opaque, PI_INDEX, avail);
1157 }
1158 
1159 static void mc_callback (void *opaque, int avail)
1160 {
1161     transfer_audio (opaque, MC_INDEX, avail);
1162 }
1163 
1164 static void po_callback (void *opaque, int free)
1165 {
1166     transfer_audio (opaque, PO_INDEX, free);
1167 }
1168 
1169 static const VMStateDescription vmstate_ac97_bm_regs = {
1170     .name = "ac97_bm_regs",
1171     .version_id = 1,
1172     .minimum_version_id = 1,
1173     .fields = (VMStateField[]) {
1174         VMSTATE_UINT32 (bdbar, AC97BusMasterRegs),
1175         VMSTATE_UINT8 (civ, AC97BusMasterRegs),
1176         VMSTATE_UINT8 (lvi, AC97BusMasterRegs),
1177         VMSTATE_UINT16 (sr, AC97BusMasterRegs),
1178         VMSTATE_UINT16 (picb, AC97BusMasterRegs),
1179         VMSTATE_UINT8 (piv, AC97BusMasterRegs),
1180         VMSTATE_UINT8 (cr, AC97BusMasterRegs),
1181         VMSTATE_UINT32 (bd_valid, AC97BusMasterRegs),
1182         VMSTATE_UINT32 (bd.addr, AC97BusMasterRegs),
1183         VMSTATE_UINT32 (bd.ctl_len, AC97BusMasterRegs),
1184         VMSTATE_END_OF_LIST ()
1185     }
1186 };
1187 
1188 static int ac97_post_load (void *opaque, int version_id)
1189 {
1190     uint8_t active[LAST_INDEX];
1191     AC97LinkState *s = opaque;
1192 
1193     record_select (s, mixer_load (s, AC97_Record_Select));
1194     set_volume (s, AC97_Master_Volume_Mute,
1195                 mixer_load (s, AC97_Master_Volume_Mute));
1196     set_volume (s, AC97_PCM_Out_Volume_Mute,
1197                 mixer_load (s, AC97_PCM_Out_Volume_Mute));
1198     set_volume (s, AC97_Record_Gain_Mute,
1199                 mixer_load (s, AC97_Record_Gain_Mute));
1200 
1201     active[PI_INDEX] = !!(s->bm_regs[PI_INDEX].cr & CR_RPBM);
1202     active[PO_INDEX] = !!(s->bm_regs[PO_INDEX].cr & CR_RPBM);
1203     active[MC_INDEX] = !!(s->bm_regs[MC_INDEX].cr & CR_RPBM);
1204     reset_voices (s, active);
1205 
1206     s->bup_flag = 0;
1207     s->last_samp = 0;
1208     return 0;
1209 }
1210 
1211 static bool is_version_2 (void *opaque, int version_id)
1212 {
1213     return version_id == 2;
1214 }
1215 
1216 static const VMStateDescription vmstate_ac97 = {
1217     .name = "ac97",
1218     .version_id = 3,
1219     .minimum_version_id = 2,
1220     .post_load = ac97_post_load,
1221     .fields = (VMStateField[]) {
1222         VMSTATE_PCI_DEVICE (dev, AC97LinkState),
1223         VMSTATE_UINT32 (glob_cnt, AC97LinkState),
1224         VMSTATE_UINT32 (glob_sta, AC97LinkState),
1225         VMSTATE_UINT32 (cas, AC97LinkState),
1226         VMSTATE_STRUCT_ARRAY (bm_regs, AC97LinkState, 3, 1,
1227                               vmstate_ac97_bm_regs, AC97BusMasterRegs),
1228         VMSTATE_BUFFER (mixer_data, AC97LinkState),
1229         VMSTATE_UNUSED_TEST (is_version_2, 3),
1230         VMSTATE_END_OF_LIST ()
1231     }
1232 };
1233 
1234 static uint64_t nam_read(void *opaque, hwaddr addr, unsigned size)
1235 {
1236     if ((addr / size) > 256) {
1237         return -1;
1238     }
1239 
1240     switch (size) {
1241     case 1:
1242         return nam_readb(opaque, addr);
1243     case 2:
1244         return nam_readw(opaque, addr);
1245     case 4:
1246         return nam_readl(opaque, addr);
1247     default:
1248         return -1;
1249     }
1250 }
1251 
1252 static void nam_write(void *opaque, hwaddr addr, uint64_t val,
1253                       unsigned size)
1254 {
1255     if ((addr / size) > 256) {
1256         return;
1257     }
1258 
1259     switch (size) {
1260     case 1:
1261         nam_writeb(opaque, addr, val);
1262         break;
1263     case 2:
1264         nam_writew(opaque, addr, val);
1265         break;
1266     case 4:
1267         nam_writel(opaque, addr, val);
1268         break;
1269     }
1270 }
1271 
1272 static const MemoryRegionOps ac97_io_nam_ops = {
1273     .read = nam_read,
1274     .write = nam_write,
1275     .impl = {
1276         .min_access_size = 1,
1277         .max_access_size = 4,
1278     },
1279     .endianness = DEVICE_LITTLE_ENDIAN,
1280 };
1281 
1282 static uint64_t nabm_read(void *opaque, hwaddr addr, unsigned size)
1283 {
1284     if ((addr / size) > 64) {
1285         return -1;
1286     }
1287 
1288     switch (size) {
1289     case 1:
1290         return nabm_readb(opaque, addr);
1291     case 2:
1292         return nabm_readw(opaque, addr);
1293     case 4:
1294         return nabm_readl(opaque, addr);
1295     default:
1296         return -1;
1297     }
1298 }
1299 
1300 static void nabm_write(void *opaque, hwaddr addr, uint64_t val,
1301                       unsigned size)
1302 {
1303     if ((addr / size) > 64) {
1304         return;
1305     }
1306 
1307     switch (size) {
1308     case 1:
1309         nabm_writeb(opaque, addr, val);
1310         break;
1311     case 2:
1312         nabm_writew(opaque, addr, val);
1313         break;
1314     case 4:
1315         nabm_writel(opaque, addr, val);
1316         break;
1317     }
1318 }
1319 
1320 
1321 static const MemoryRegionOps ac97_io_nabm_ops = {
1322     .read = nabm_read,
1323     .write = nabm_write,
1324     .impl = {
1325         .min_access_size = 1,
1326         .max_access_size = 4,
1327     },
1328     .endianness = DEVICE_LITTLE_ENDIAN,
1329 };
1330 
1331 static void ac97_on_reset (DeviceState *dev)
1332 {
1333     AC97LinkState *s = container_of(dev, AC97LinkState, dev.qdev);
1334 
1335     reset_bm_regs (s, &s->bm_regs[0]);
1336     reset_bm_regs (s, &s->bm_regs[1]);
1337     reset_bm_regs (s, &s->bm_regs[2]);
1338 
1339     /*
1340      * Reset the mixer too. The Windows XP driver seems to rely on
1341      * this. At least it wants to read the vendor id before it resets
1342      * the codec manually.
1343      */
1344     mixer_reset (s);
1345 }
1346 
1347 static void ac97_realize(PCIDevice *dev, Error **errp)
1348 {
1349     AC97LinkState *s = AC97(dev);
1350     uint8_t *c = s->dev.config;
1351 
1352     /* TODO: no need to override */
1353     c[PCI_COMMAND] = 0x00;      /* pcicmd pci command rw, ro */
1354     c[PCI_COMMAND + 1] = 0x00;
1355 
1356     /* TODO: */
1357     c[PCI_STATUS] = PCI_STATUS_FAST_BACK;      /* pcists pci status rwc, ro */
1358     c[PCI_STATUS + 1] = PCI_STATUS_DEVSEL_MEDIUM >> 8;
1359 
1360     c[PCI_CLASS_PROG] = 0x00;      /* pi programming interface ro */
1361 
1362     /* TODO set when bar is registered. no need to override. */
1363     /* nabmar native audio mixer base address rw */
1364     c[PCI_BASE_ADDRESS_0] = PCI_BASE_ADDRESS_SPACE_IO;
1365     c[PCI_BASE_ADDRESS_0 + 1] = 0x00;
1366     c[PCI_BASE_ADDRESS_0 + 2] = 0x00;
1367     c[PCI_BASE_ADDRESS_0 + 3] = 0x00;
1368 
1369     /* TODO set when bar is registered. no need to override. */
1370       /* nabmbar native audio bus mastering base address rw */
1371     c[PCI_BASE_ADDRESS_0 + 4] = PCI_BASE_ADDRESS_SPACE_IO;
1372     c[PCI_BASE_ADDRESS_0 + 5] = 0x00;
1373     c[PCI_BASE_ADDRESS_0 + 6] = 0x00;
1374     c[PCI_BASE_ADDRESS_0 + 7] = 0x00;
1375 
1376     if (s->use_broken_id) {
1377         c[PCI_SUBSYSTEM_VENDOR_ID] = 0x86;
1378         c[PCI_SUBSYSTEM_VENDOR_ID + 1] = 0x80;
1379         c[PCI_SUBSYSTEM_ID] = 0x00;
1380         c[PCI_SUBSYSTEM_ID + 1] = 0x00;
1381     }
1382 
1383     c[PCI_INTERRUPT_LINE] = 0x00;      /* intr_ln interrupt line rw */
1384     c[PCI_INTERRUPT_PIN] = 0x01;      /* intr_pn interrupt pin ro */
1385 
1386     memory_region_init_io (&s->io_nam, OBJECT(s), &ac97_io_nam_ops, s,
1387                            "ac97-nam", 1024);
1388     memory_region_init_io (&s->io_nabm, OBJECT(s), &ac97_io_nabm_ops, s,
1389                            "ac97-nabm", 256);
1390     pci_register_bar (&s->dev, 0, PCI_BASE_ADDRESS_SPACE_IO, &s->io_nam);
1391     pci_register_bar (&s->dev, 1, PCI_BASE_ADDRESS_SPACE_IO, &s->io_nabm);
1392     AUD_register_card ("ac97", &s->card);
1393     ac97_on_reset(DEVICE(s));
1394 }
1395 
1396 static void ac97_exit(PCIDevice *dev)
1397 {
1398     AC97LinkState *s = AC97(dev);
1399 
1400     AUD_close_in(&s->card, s->voice_pi);
1401     AUD_close_out(&s->card, s->voice_po);
1402     AUD_close_in(&s->card, s->voice_mc);
1403     AUD_remove_card(&s->card);
1404 }
1405 
1406 static int ac97_init (PCIBus *bus)
1407 {
1408     pci_create_simple(bus, -1, TYPE_AC97);
1409     return 0;
1410 }
1411 
1412 static Property ac97_properties[] = {
1413     DEFINE_AUDIO_PROPERTIES(AC97LinkState, card),
1414     DEFINE_PROP_UINT32 ("use_broken_id", AC97LinkState, use_broken_id, 0),
1415     DEFINE_PROP_END_OF_LIST (),
1416 };
1417 
1418 static void ac97_class_init (ObjectClass *klass, void *data)
1419 {
1420     DeviceClass *dc = DEVICE_CLASS (klass);
1421     PCIDeviceClass *k = PCI_DEVICE_CLASS (klass);
1422 
1423     k->realize = ac97_realize;
1424     k->exit = ac97_exit;
1425     k->vendor_id = PCI_VENDOR_ID_INTEL;
1426     k->device_id = PCI_DEVICE_ID_INTEL_82801AA_5;
1427     k->revision = 0x01;
1428     k->class_id = PCI_CLASS_MULTIMEDIA_AUDIO;
1429     set_bit(DEVICE_CATEGORY_SOUND, dc->categories);
1430     dc->desc = "Intel 82801AA AC97 Audio";
1431     dc->vmsd = &vmstate_ac97;
1432     dc->props = ac97_properties;
1433     dc->reset = ac97_on_reset;
1434 }
1435 
1436 static const TypeInfo ac97_info = {
1437     .name          = TYPE_AC97,
1438     .parent        = TYPE_PCI_DEVICE,
1439     .instance_size = sizeof (AC97LinkState),
1440     .class_init    = ac97_class_init,
1441     .interfaces = (InterfaceInfo[]) {
1442         { INTERFACE_CONVENTIONAL_PCI_DEVICE },
1443         { },
1444     },
1445 };
1446 
1447 static void ac97_register_types (void)
1448 {
1449     type_register_static (&ac97_info);
1450     pci_register_soundhw("ac97", "Intel 82801AA AC97 Audio", ac97_init);
1451 }
1452 
1453 type_init (ac97_register_types)
1454