xref: /openbmc/qemu/hw/audio/ac97.c (revision c09124dc)
1 /*
2  * Copyright (C) 2006 InnoTek Systemberatung GmbH
3  *
4  * This file is part of VirtualBox Open Source Edition (OSE), as
5  * available from http://www.virtualbox.org. This file is free software;
6  * you can redistribute it and/or modify it under the terms of the GNU
7  * General Public License as published by the Free Software Foundation,
8  * in version 2 as it comes in the "COPYING" file of the VirtualBox OSE
9  * distribution. VirtualBox OSE is distributed in the hope that it will
10  * be useful, but WITHOUT ANY WARRANTY of any kind.
11  *
12  * If you received this file as part of a commercial VirtualBox
13  * distribution, then only the terms of your commercial VirtualBox
14  * license agreement apply instead of the previous paragraph.
15  *
16  * Contributions after 2012-01-13 are licensed under the terms of the
17  * GNU GPL, version 2 or (at your option) any later version.
18  */
19 
20 #include "qemu/osdep.h"
21 #include "hw/audio/soundhw.h"
22 #include "audio/audio.h"
23 #include "hw/pci/pci.h"
24 #include "hw/qdev-properties.h"
25 #include "migration/vmstate.h"
26 #include "qemu/module.h"
27 #include "sysemu/dma.h"
28 #include "qom/object.h"
29 
30 enum {
31     AC97_Reset                     = 0x00,
32     AC97_Master_Volume_Mute        = 0x02,
33     AC97_Headphone_Volume_Mute     = 0x04,
34     AC97_Master_Volume_Mono_Mute   = 0x06,
35     AC97_Master_Tone_RL            = 0x08,
36     AC97_PC_BEEP_Volume_Mute       = 0x0A,
37     AC97_Phone_Volume_Mute         = 0x0C,
38     AC97_Mic_Volume_Mute           = 0x0E,
39     AC97_Line_In_Volume_Mute       = 0x10,
40     AC97_CD_Volume_Mute            = 0x12,
41     AC97_Video_Volume_Mute         = 0x14,
42     AC97_Aux_Volume_Mute           = 0x16,
43     AC97_PCM_Out_Volume_Mute       = 0x18,
44     AC97_Record_Select             = 0x1A,
45     AC97_Record_Gain_Mute          = 0x1C,
46     AC97_Record_Gain_Mic_Mute      = 0x1E,
47     AC97_General_Purpose           = 0x20,
48     AC97_3D_Control                = 0x22,
49     AC97_AC_97_RESERVED            = 0x24,
50     AC97_Powerdown_Ctrl_Stat       = 0x26,
51     AC97_Extended_Audio_ID         = 0x28,
52     AC97_Extended_Audio_Ctrl_Stat  = 0x2A,
53     AC97_PCM_Front_DAC_Rate        = 0x2C,
54     AC97_PCM_Surround_DAC_Rate     = 0x2E,
55     AC97_PCM_LFE_DAC_Rate          = 0x30,
56     AC97_PCM_LR_ADC_Rate           = 0x32,
57     AC97_MIC_ADC_Rate              = 0x34,
58     AC97_6Ch_Vol_C_LFE_Mute        = 0x36,
59     AC97_6Ch_Vol_L_R_Surround_Mute = 0x38,
60     AC97_Vendor_Reserved           = 0x58,
61     AC97_Sigmatel_Analog           = 0x6c, /* We emulate a Sigmatel codec */
62     AC97_Sigmatel_Dac2Invert       = 0x6e, /* We emulate a Sigmatel codec */
63     AC97_Vendor_ID1                = 0x7c,
64     AC97_Vendor_ID2                = 0x7e
65 };
66 
67 #define SOFT_VOLUME
68 #define SR_FIFOE 16             /* rwc */
69 #define SR_BCIS  8              /* rwc */
70 #define SR_LVBCI 4              /* rwc */
71 #define SR_CELV  2              /* ro */
72 #define SR_DCH   1              /* ro */
73 #define SR_VALID_MASK ((1 << 5) - 1)
74 #define SR_WCLEAR_MASK (SR_FIFOE | SR_BCIS | SR_LVBCI)
75 #define SR_RO_MASK (SR_DCH | SR_CELV)
76 #define SR_INT_MASK (SR_FIFOE | SR_BCIS | SR_LVBCI)
77 
78 #define CR_IOCE  16             /* rw */
79 #define CR_FEIE  8              /* rw */
80 #define CR_LVBIE 4              /* rw */
81 #define CR_RR    2              /* rw */
82 #define CR_RPBM  1              /* rw */
83 #define CR_VALID_MASK ((1 << 5) - 1)
84 #define CR_DONT_CLEAR_MASK (CR_IOCE | CR_FEIE | CR_LVBIE)
85 
86 #define GC_WR    4              /* rw */
87 #define GC_CR    2              /* rw */
88 #define GC_VALID_MASK ((1 << 6) - 1)
89 
90 #define GS_MD3   (1<<17)        /* rw */
91 #define GS_AD3   (1<<16)        /* rw */
92 #define GS_RCS   (1<<15)        /* rwc */
93 #define GS_B3S12 (1<<14)        /* ro */
94 #define GS_B2S12 (1<<13)        /* ro */
95 #define GS_B1S12 (1<<12)        /* ro */
96 #define GS_S1R1  (1<<11)        /* rwc */
97 #define GS_S0R1  (1<<10)        /* rwc */
98 #define GS_S1CR  (1<<9)         /* ro */
99 #define GS_S0CR  (1<<8)         /* ro */
100 #define GS_MINT  (1<<7)         /* ro */
101 #define GS_POINT (1<<6)         /* ro */
102 #define GS_PIINT (1<<5)         /* ro */
103 #define GS_RSRVD ((1<<4)|(1<<3))
104 #define GS_MOINT (1<<2)         /* ro */
105 #define GS_MIINT (1<<1)         /* ro */
106 #define GS_GSCI  1              /* rwc */
107 #define GS_RO_MASK (GS_B3S12|                   \
108                     GS_B2S12|                   \
109                     GS_B1S12|                   \
110                     GS_S1CR|                    \
111                     GS_S0CR|                    \
112                     GS_MINT|                    \
113                     GS_POINT|                   \
114                     GS_PIINT|                   \
115                     GS_RSRVD|                   \
116                     GS_MOINT|                   \
117                     GS_MIINT)
118 #define GS_VALID_MASK ((1 << 18) - 1)
119 #define GS_WCLEAR_MASK (GS_RCS|GS_S1R1|GS_S0R1|GS_GSCI)
120 
121 #define BD_IOC (1<<31)
122 #define BD_BUP (1<<30)
123 
124 #define EACS_VRA 1
125 #define EACS_VRM 8
126 
127 #define MUTE_SHIFT 15
128 
129 #define TYPE_AC97 "AC97"
130 OBJECT_DECLARE_SIMPLE_TYPE(AC97LinkState, 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 struct AC97LinkState {
162     PCIDevice dev;
163     QEMUSoundCard card;
164     uint32_t glob_cnt;
165     uint32_t glob_sta;
166     uint32_t cas;
167     uint32_t last_samp;
168     AC97BusMasterRegs bm_regs[3];
169     uint8_t mixer_data[256];
170     SWVoiceIn *voice_pi;
171     SWVoiceOut *voice_po;
172     SWVoiceIn *voice_mc;
173     int invalid_freq[3];
174     uint8_t silence[128];
175     int bup_flag;
176     MemoryRegion io_nam;
177     MemoryRegion io_nabm;
178 };
179 
180 enum {
181     BUP_SET = 1,
182     BUP_LAST = 2
183 };
184 
185 #ifdef DEBUG_AC97
186 #define dolog(...) AUD_log ("ac97", __VA_ARGS__)
187 #else
188 #define dolog(...)
189 #endif
190 
191 #define MKREGS(prefix, start)                   \
192 enum {                                          \
193     prefix ## _BDBAR = start,                   \
194     prefix ## _CIV = start + 4,                 \
195     prefix ## _LVI = start + 5,                 \
196     prefix ## _SR = start + 6,                  \
197     prefix ## _PICB = start + 8,                \
198     prefix ## _PIV = start + 10,                \
199     prefix ## _CR = start + 11                  \
200 }
201 
202 enum {
203     PI_INDEX = 0,
204     PO_INDEX,
205     MC_INDEX,
206     LAST_INDEX
207 };
208 
209 MKREGS (PI, PI_INDEX * 16);
210 MKREGS (PO, PO_INDEX * 16);
211 MKREGS (MC, MC_INDEX * 16);
212 
213 enum {
214     GLOB_CNT = 0x2c,
215     GLOB_STA = 0x30,
216     CAS      = 0x34
217 };
218 
219 #define GET_BM(index) (((index) >> 4) & 3)
220 
221 static void po_callback (void *opaque, int free);
222 static void pi_callback (void *opaque, int avail);
223 static void mc_callback (void *opaque, int avail);
224 
225 static void warm_reset (AC97LinkState *s)
226 {
227     (void) s;
228 }
229 
230 static void cold_reset (AC97LinkState * s)
231 {
232     (void) s;
233 }
234 
235 static void fetch_bd (AC97LinkState *s, AC97BusMasterRegs *r)
236 {
237     uint8_t b[8];
238 
239     pci_dma_read (&s->dev, r->bdbar + r->civ * 8, b, 8);
240     r->bd_valid = 1;
241     r->bd.addr = le32_to_cpu (*(uint32_t *) &b[0]) & ~3;
242     r->bd.ctl_len = le32_to_cpu (*(uint32_t *) &b[4]);
243     r->picb = r->bd.ctl_len & 0xffff;
244     dolog ("bd %2d addr=%#x ctl=%#06x len=%#x(%d bytes)\n",
245            r->civ, r->bd.addr, r->bd.ctl_len >> 16,
246            r->bd.ctl_len & 0xffff,
247            (r->bd.ctl_len & 0xffff) << 1);
248 }
249 
250 static void update_sr (AC97LinkState *s, AC97BusMasterRegs *r, uint32_t new_sr)
251 {
252     int event = 0;
253     int level = 0;
254     uint32_t new_mask = new_sr & SR_INT_MASK;
255     uint32_t old_mask = r->sr & SR_INT_MASK;
256     uint32_t masks[] = {GS_PIINT, GS_POINT, GS_MINT};
257 
258     if (new_mask ^ old_mask) {
259         /** @todo is IRQ deasserted when only one of status bits is cleared? */
260         if (!new_mask) {
261             event = 1;
262             level = 0;
263         }
264         else {
265             if ((new_mask & SR_LVBCI) && (r->cr & CR_LVBIE)) {
266                 event = 1;
267                 level = 1;
268             }
269             if ((new_mask & SR_BCIS) && (r->cr & CR_IOCE)) {
270                 event = 1;
271                 level = 1;
272             }
273         }
274     }
275 
276     r->sr = new_sr;
277 
278     dolog ("IOC%d LVB%d sr=%#x event=%d level=%d\n",
279            r->sr & SR_BCIS, r->sr & SR_LVBCI,
280            r->sr,
281            event, level);
282 
283     if (!event)
284         return;
285 
286     if (level) {
287         s->glob_sta |= masks[r - s->bm_regs];
288         dolog ("set irq level=1\n");
289         pci_irq_assert(&s->dev);
290     }
291     else {
292         s->glob_sta &= ~masks[r - s->bm_regs];
293         dolog ("set irq level=0\n");
294         pci_irq_deassert(&s->dev);
295     }
296 }
297 
298 static void voice_set_active (AC97LinkState *s, int bm_index, int on)
299 {
300     switch (bm_index) {
301     case PI_INDEX:
302         AUD_set_active_in (s->voice_pi, on);
303         break;
304 
305     case PO_INDEX:
306         AUD_set_active_out (s->voice_po, on);
307         break;
308 
309     case MC_INDEX:
310         AUD_set_active_in (s->voice_mc, on);
311         break;
312 
313     default:
314         AUD_log ("ac97", "invalid bm_index(%d) in voice_set_active", bm_index);
315         break;
316     }
317 }
318 
319 static void reset_bm_regs (AC97LinkState *s, AC97BusMasterRegs *r)
320 {
321     dolog ("reset_bm_regs\n");
322     r->bdbar = 0;
323     r->civ = 0;
324     r->lvi = 0;
325     /** todo do we need to do that? */
326     update_sr (s, r, SR_DCH);
327     r->picb = 0;
328     r->piv = 0;
329     r->cr = r->cr & CR_DONT_CLEAR_MASK;
330     r->bd_valid = 0;
331 
332     voice_set_active (s, r - s->bm_regs, 0);
333     memset (s->silence, 0, sizeof (s->silence));
334 }
335 
336 static void mixer_store (AC97LinkState *s, uint32_t i, uint16_t v)
337 {
338     if (i + 2 > sizeof (s->mixer_data)) {
339         dolog ("mixer_store: index %d out of bounds %zd\n",
340                i, sizeof (s->mixer_data));
341         return;
342     }
343 
344     s->mixer_data[i + 0] = v & 0xff;
345     s->mixer_data[i + 1] = v >> 8;
346 }
347 
348 static uint16_t mixer_load (AC97LinkState *s, uint32_t i)
349 {
350     uint16_t val = 0xffff;
351 
352     if (i + 2 > sizeof (s->mixer_data)) {
353         dolog ("mixer_load: index %d out of bounds %zd\n",
354                i, sizeof (s->mixer_data));
355     }
356     else {
357         val = s->mixer_data[i + 0] | (s->mixer_data[i + 1] << 8);
358     }
359 
360     return val;
361 }
362 
363 static void open_voice (AC97LinkState *s, int index, int freq)
364 {
365     struct audsettings as;
366 
367     as.freq = freq;
368     as.nchannels = 2;
369     as.fmt = AUDIO_FORMAT_S16;
370     as.endianness = 0;
371 
372     if (freq > 0) {
373         s->invalid_freq[index] = 0;
374         switch (index) {
375         case PI_INDEX:
376             s->voice_pi = AUD_open_in (
377                 &s->card,
378                 s->voice_pi,
379                 "ac97.pi",
380                 s,
381                 pi_callback,
382                 &as
383                 );
384             break;
385 
386         case PO_INDEX:
387             s->voice_po = AUD_open_out (
388                 &s->card,
389                 s->voice_po,
390                 "ac97.po",
391                 s,
392                 po_callback,
393                 &as
394                 );
395             break;
396 
397         case MC_INDEX:
398             s->voice_mc = AUD_open_in (
399                 &s->card,
400                 s->voice_mc,
401                 "ac97.mc",
402                 s,
403                 mc_callback,
404                 &as
405                 );
406             break;
407         }
408     }
409     else {
410         s->invalid_freq[index] = freq;
411         switch (index) {
412         case PI_INDEX:
413             AUD_close_in (&s->card, s->voice_pi);
414             s->voice_pi = NULL;
415             break;
416 
417         case PO_INDEX:
418             AUD_close_out (&s->card, s->voice_po);
419             s->voice_po = NULL;
420             break;
421 
422         case MC_INDEX:
423             AUD_close_in (&s->card, s->voice_mc);
424             s->voice_mc = NULL;
425             break;
426         }
427     }
428 }
429 
430 static void reset_voices (AC97LinkState *s, uint8_t active[LAST_INDEX])
431 {
432     uint16_t freq;
433 
434     freq = mixer_load (s, AC97_PCM_LR_ADC_Rate);
435     open_voice (s, PI_INDEX, freq);
436     AUD_set_active_in (s->voice_pi, active[PI_INDEX]);
437 
438     freq = mixer_load (s, AC97_PCM_Front_DAC_Rate);
439     open_voice (s, PO_INDEX, freq);
440     AUD_set_active_out (s->voice_po, active[PO_INDEX]);
441 
442     freq = mixer_load (s, AC97_MIC_ADC_Rate);
443     open_voice (s, MC_INDEX, freq);
444     AUD_set_active_in (s->voice_mc, active[MC_INDEX]);
445 }
446 
447 static void get_volume (uint16_t vol, uint16_t mask, int inverse,
448                         int *mute, uint8_t *lvol, uint8_t *rvol)
449 {
450     *mute = (vol >> MUTE_SHIFT) & 1;
451     *rvol = (255 * (vol & mask)) / mask;
452     *lvol = (255 * ((vol >> 8) & mask)) / mask;
453 
454     if (inverse) {
455         *rvol = 255 - *rvol;
456         *lvol = 255 - *lvol;
457     }
458 }
459 
460 static void update_combined_volume_out (AC97LinkState *s)
461 {
462     uint8_t lvol, rvol, plvol, prvol;
463     int mute, pmute;
464 
465     get_volume (mixer_load (s, AC97_Master_Volume_Mute), 0x3f, 1,
466                 &mute, &lvol, &rvol);
467     get_volume (mixer_load (s, AC97_PCM_Out_Volume_Mute), 0x1f, 1,
468                 &pmute, &plvol, &prvol);
469 
470     mute = mute | pmute;
471     lvol = (lvol * plvol) / 255;
472     rvol = (rvol * prvol) / 255;
473 
474     AUD_set_volume_out (s->voice_po, mute, lvol, rvol);
475 }
476 
477 static void update_volume_in (AC97LinkState *s)
478 {
479     uint8_t lvol, rvol;
480     int mute;
481 
482     get_volume (mixer_load (s, AC97_Record_Gain_Mute), 0x0f, 0,
483                 &mute, &lvol, &rvol);
484 
485     AUD_set_volume_in (s->voice_pi, mute, lvol, rvol);
486 }
487 
488 static void set_volume (AC97LinkState *s, int index, uint32_t val)
489 {
490     switch (index) {
491     case AC97_Master_Volume_Mute:
492         val &= 0xbf3f;
493         mixer_store (s, index, val);
494         update_combined_volume_out (s);
495         break;
496     case AC97_PCM_Out_Volume_Mute:
497         val &= 0x9f1f;
498         mixer_store (s, index, val);
499         update_combined_volume_out (s);
500         break;
501     case AC97_Record_Gain_Mute:
502         val &= 0x8f0f;
503         mixer_store (s, index, val);
504         update_volume_in (s);
505         break;
506     }
507 }
508 
509 static void record_select (AC97LinkState *s, uint32_t val)
510 {
511     uint8_t rs = val & REC_MASK;
512     uint8_t ls = (val >> 8) & REC_MASK;
513     mixer_store (s, AC97_Record_Select, rs | (ls << 8));
514 }
515 
516 static void mixer_reset (AC97LinkState *s)
517 {
518     uint8_t active[LAST_INDEX];
519 
520     dolog ("mixer_reset\n");
521     memset (s->mixer_data, 0, sizeof (s->mixer_data));
522     memset (active, 0, sizeof (active));
523     mixer_store (s, AC97_Reset                   , 0x0000); /* 6940 */
524     mixer_store (s, AC97_Headphone_Volume_Mute   , 0x0000);
525     mixer_store (s, AC97_Master_Volume_Mono_Mute , 0x0000);
526     mixer_store (s, AC97_Master_Tone_RL,           0x0000);
527     mixer_store (s, AC97_PC_BEEP_Volume_Mute     , 0x0000);
528     mixer_store (s, AC97_Phone_Volume_Mute       , 0x0000);
529     mixer_store (s, AC97_Mic_Volume_Mute         , 0x0000);
530     mixer_store (s, AC97_Line_In_Volume_Mute     , 0x0000);
531     mixer_store (s, AC97_CD_Volume_Mute          , 0x0000);
532     mixer_store (s, AC97_Video_Volume_Mute       , 0x0000);
533     mixer_store (s, AC97_Aux_Volume_Mute         , 0x0000);
534     mixer_store (s, AC97_Record_Gain_Mic_Mute    , 0x0000);
535     mixer_store (s, AC97_General_Purpose         , 0x0000);
536     mixer_store (s, AC97_3D_Control              , 0x0000);
537     mixer_store (s, AC97_Powerdown_Ctrl_Stat     , 0x000f);
538 
539     /*
540      * Sigmatel 9700 (STAC9700)
541      */
542     mixer_store (s, AC97_Vendor_ID1              , 0x8384);
543     mixer_store (s, AC97_Vendor_ID2              , 0x7600); /* 7608 */
544 
545     mixer_store (s, AC97_Extended_Audio_ID       , 0x0809);
546     mixer_store (s, AC97_Extended_Audio_Ctrl_Stat, 0x0009);
547     mixer_store (s, AC97_PCM_Front_DAC_Rate      , 0xbb80);
548     mixer_store (s, AC97_PCM_Surround_DAC_Rate   , 0xbb80);
549     mixer_store (s, AC97_PCM_LFE_DAC_Rate        , 0xbb80);
550     mixer_store (s, AC97_PCM_LR_ADC_Rate         , 0xbb80);
551     mixer_store (s, AC97_MIC_ADC_Rate            , 0xbb80);
552 
553     record_select (s, 0);
554     set_volume (s, AC97_Master_Volume_Mute, 0x8000);
555     set_volume (s, AC97_PCM_Out_Volume_Mute, 0x8808);
556     set_volume (s, AC97_Record_Gain_Mute, 0x8808);
557 
558     reset_voices (s, active);
559 }
560 
561 /**
562  * Native audio mixer
563  * I/O Reads
564  */
565 static uint32_t nam_readb (void *opaque, uint32_t addr)
566 {
567     AC97LinkState *s = opaque;
568     dolog ("U nam readb %#x\n", addr);
569     s->cas = 0;
570     return ~0U;
571 }
572 
573 static uint32_t nam_readw (void *opaque, uint32_t addr)
574 {
575     AC97LinkState *s = opaque;
576     uint32_t index = addr;
577     s->cas = 0;
578     return mixer_load(s, index);
579 }
580 
581 static uint32_t nam_readl (void *opaque, uint32_t addr)
582 {
583     AC97LinkState *s = opaque;
584     dolog ("U nam readl %#x\n", addr);
585     s->cas = 0;
586     return ~0U;
587 }
588 
589 /**
590  * Native audio mixer
591  * I/O Writes
592  */
593 static void nam_writeb (void *opaque, uint32_t addr, uint32_t val)
594 {
595     AC97LinkState *s = opaque;
596     dolog ("U nam writeb %#x <- %#x\n", addr, val);
597     s->cas = 0;
598 }
599 
600 static void nam_writew (void *opaque, uint32_t addr, uint32_t val)
601 {
602     AC97LinkState *s = opaque;
603     uint32_t index = addr;
604     s->cas = 0;
605     switch (index) {
606     case AC97_Reset:
607         mixer_reset (s);
608         break;
609     case AC97_Powerdown_Ctrl_Stat:
610         val &= ~0x800f;
611         val |= mixer_load (s, index) & 0xf;
612         mixer_store (s, index, val);
613         break;
614     case AC97_PCM_Out_Volume_Mute:
615     case AC97_Master_Volume_Mute:
616     case AC97_Record_Gain_Mute:
617         set_volume (s, index, val);
618         break;
619     case AC97_Record_Select:
620         record_select (s, val);
621         break;
622     case AC97_Vendor_ID1:
623     case AC97_Vendor_ID2:
624         dolog ("Attempt to write vendor ID to %#x\n", val);
625         break;
626     case AC97_Extended_Audio_ID:
627         dolog ("Attempt to write extended audio ID to %#x\n", val);
628         break;
629     case AC97_Extended_Audio_Ctrl_Stat:
630         if (!(val & EACS_VRA)) {
631             mixer_store (s, AC97_PCM_Front_DAC_Rate, 0xbb80);
632             mixer_store (s, AC97_PCM_LR_ADC_Rate,    0xbb80);
633             open_voice (s, PI_INDEX, 48000);
634             open_voice (s, PO_INDEX, 48000);
635         }
636         if (!(val & EACS_VRM)) {
637             mixer_store (s, AC97_MIC_ADC_Rate, 0xbb80);
638             open_voice (s, MC_INDEX, 48000);
639         }
640         dolog ("Setting extended audio control to %#x\n", val);
641         mixer_store (s, AC97_Extended_Audio_Ctrl_Stat, val);
642         break;
643     case AC97_PCM_Front_DAC_Rate:
644         if (mixer_load (s, AC97_Extended_Audio_Ctrl_Stat) & EACS_VRA) {
645             mixer_store (s, index, val);
646             dolog ("Set front DAC rate to %d\n", val);
647             open_voice (s, PO_INDEX, val);
648         }
649         else {
650             dolog ("Attempt to set front DAC rate to %d, "
651                    "but VRA is not set\n",
652                    val);
653         }
654         break;
655     case AC97_MIC_ADC_Rate:
656         if (mixer_load (s, AC97_Extended_Audio_Ctrl_Stat) & EACS_VRM) {
657             mixer_store (s, index, val);
658             dolog ("Set MIC ADC rate to %d\n", val);
659             open_voice (s, MC_INDEX, val);
660         }
661         else {
662             dolog ("Attempt to set MIC ADC rate to %d, "
663                    "but VRM is not set\n",
664                    val);
665         }
666         break;
667     case AC97_PCM_LR_ADC_Rate:
668         if (mixer_load (s, AC97_Extended_Audio_Ctrl_Stat) & EACS_VRA) {
669             mixer_store (s, index, val);
670             dolog ("Set front LR ADC rate to %d\n", val);
671             open_voice (s, PI_INDEX, val);
672         }
673         else {
674             dolog ("Attempt to set LR ADC rate to %d, but VRA is not set\n",
675                     val);
676         }
677         break;
678     case AC97_Headphone_Volume_Mute:
679     case AC97_Master_Volume_Mono_Mute:
680     case AC97_Master_Tone_RL:
681     case AC97_PC_BEEP_Volume_Mute:
682     case AC97_Phone_Volume_Mute:
683     case AC97_Mic_Volume_Mute:
684     case AC97_Line_In_Volume_Mute:
685     case AC97_CD_Volume_Mute:
686     case AC97_Video_Volume_Mute:
687     case AC97_Aux_Volume_Mute:
688     case AC97_Record_Gain_Mic_Mute:
689     case AC97_General_Purpose:
690     case AC97_3D_Control:
691     case AC97_Sigmatel_Analog:
692     case AC97_Sigmatel_Dac2Invert:
693         /* None of the features in these regs are emulated, so they are RO */
694         break;
695     default:
696         dolog ("U nam writew %#x <- %#x\n", addr, val);
697         mixer_store (s, index, val);
698         break;
699     }
700 }
701 
702 static void nam_writel (void *opaque, uint32_t addr, uint32_t val)
703 {
704     AC97LinkState *s = opaque;
705     dolog ("U nam writel %#x <- %#x\n", addr, val);
706     s->cas = 0;
707 }
708 
709 /**
710  * Native audio bus master
711  * I/O Reads
712  */
713 static uint32_t nabm_readb (void *opaque, uint32_t addr)
714 {
715     AC97LinkState *s = opaque;
716     AC97BusMasterRegs *r = NULL;
717     uint32_t index = addr;
718     uint32_t val = ~0U;
719 
720     switch (index) {
721     case CAS:
722         dolog ("CAS %d\n", s->cas);
723         val = s->cas;
724         s->cas = 1;
725         break;
726     case PI_CIV:
727     case PO_CIV:
728     case MC_CIV:
729         r = &s->bm_regs[GET_BM (index)];
730         val = r->civ;
731         dolog ("CIV[%d] -> %#x\n", GET_BM (index), val);
732         break;
733     case PI_LVI:
734     case PO_LVI:
735     case MC_LVI:
736         r = &s->bm_regs[GET_BM (index)];
737         val = r->lvi;
738         dolog ("LVI[%d] -> %#x\n", GET_BM (index), val);
739         break;
740     case PI_PIV:
741     case PO_PIV:
742     case MC_PIV:
743         r = &s->bm_regs[GET_BM (index)];
744         val = r->piv;
745         dolog ("PIV[%d] -> %#x\n", GET_BM (index), val);
746         break;
747     case PI_CR:
748     case PO_CR:
749     case MC_CR:
750         r = &s->bm_regs[GET_BM (index)];
751         val = r->cr;
752         dolog ("CR[%d] -> %#x\n", GET_BM (index), val);
753         break;
754     case PI_SR:
755     case PO_SR:
756     case MC_SR:
757         r = &s->bm_regs[GET_BM (index)];
758         val = r->sr & 0xff;
759         dolog ("SRb[%d] -> %#x\n", GET_BM (index), val);
760         break;
761     default:
762         dolog ("U nabm readb %#x -> %#x\n", addr, val);
763         break;
764     }
765     return val;
766 }
767 
768 static uint32_t nabm_readw (void *opaque, uint32_t addr)
769 {
770     AC97LinkState *s = opaque;
771     AC97BusMasterRegs *r = NULL;
772     uint32_t index = addr;
773     uint32_t val = ~0U;
774 
775     switch (index) {
776     case PI_SR:
777     case PO_SR:
778     case MC_SR:
779         r = &s->bm_regs[GET_BM (index)];
780         val = r->sr;
781         dolog ("SR[%d] -> %#x\n", GET_BM (index), val);
782         break;
783     case PI_PICB:
784     case PO_PICB:
785     case MC_PICB:
786         r = &s->bm_regs[GET_BM (index)];
787         val = r->picb;
788         dolog ("PICB[%d] -> %#x\n", GET_BM (index), val);
789         break;
790     default:
791         dolog ("U nabm readw %#x -> %#x\n", addr, val);
792         break;
793     }
794     return val;
795 }
796 
797 static uint32_t nabm_readl (void *opaque, uint32_t addr)
798 {
799     AC97LinkState *s = opaque;
800     AC97BusMasterRegs *r = NULL;
801     uint32_t index = addr;
802     uint32_t val = ~0U;
803 
804     switch (index) {
805     case PI_BDBAR:
806     case PO_BDBAR:
807     case MC_BDBAR:
808         r = &s->bm_regs[GET_BM (index)];
809         val = r->bdbar;
810         dolog ("BMADDR[%d] -> %#x\n", GET_BM (index), val);
811         break;
812     case PI_CIV:
813     case PO_CIV:
814     case MC_CIV:
815         r = &s->bm_regs[GET_BM (index)];
816         val = r->civ | (r->lvi << 8) | (r->sr << 16);
817         dolog ("CIV LVI SR[%d] -> %#x, %#x, %#x\n", GET_BM (index),
818                r->civ, r->lvi, r->sr);
819         break;
820     case PI_PICB:
821     case PO_PICB:
822     case MC_PICB:
823         r = &s->bm_regs[GET_BM (index)];
824         val = r->picb | (r->piv << 16) | (r->cr << 24);
825         dolog ("PICB PIV CR[%d] -> %#x %#x %#x %#x\n", GET_BM (index),
826                val, r->picb, r->piv, r->cr);
827         break;
828     case GLOB_CNT:
829         val = s->glob_cnt;
830         dolog ("glob_cnt -> %#x\n", val);
831         break;
832     case GLOB_STA:
833         val = s->glob_sta | GS_S0CR;
834         dolog ("glob_sta -> %#x\n", val);
835         break;
836     default:
837         dolog ("U nabm readl %#x -> %#x\n", addr, val);
838         break;
839     }
840     return val;
841 }
842 
843 /**
844  * Native audio bus master
845  * I/O Writes
846  */
847 static void nabm_writeb (void *opaque, uint32_t addr, uint32_t val)
848 {
849     AC97LinkState *s = opaque;
850     AC97BusMasterRegs *r = NULL;
851     uint32_t index = addr;
852     switch (index) {
853     case PI_LVI:
854     case PO_LVI:
855     case MC_LVI:
856         r = &s->bm_regs[GET_BM (index)];
857         if ((r->cr & CR_RPBM) && (r->sr & SR_DCH)) {
858             r->sr &= ~(SR_DCH | SR_CELV);
859             r->civ = r->piv;
860             r->piv = (r->piv + 1) % 32;
861             fetch_bd (s, r);
862         }
863         r->lvi = val % 32;
864         dolog ("LVI[%d] <- %#x\n", GET_BM (index), val);
865         break;
866     case PI_CR:
867     case PO_CR:
868     case MC_CR:
869         r = &s->bm_regs[GET_BM (index)];
870         if (val & CR_RR) {
871             reset_bm_regs (s, r);
872         }
873         else {
874             r->cr = val & CR_VALID_MASK;
875             if (!(r->cr & CR_RPBM)) {
876                 voice_set_active (s, r - s->bm_regs, 0);
877                 r->sr |= SR_DCH;
878             }
879             else {
880                 r->civ = r->piv;
881                 r->piv = (r->piv + 1) % 32;
882                 fetch_bd (s, r);
883                 r->sr &= ~SR_DCH;
884                 voice_set_active (s, r - s->bm_regs, 1);
885             }
886         }
887         dolog ("CR[%d] <- %#x (cr %#x)\n", GET_BM (index), val, r->cr);
888         break;
889     case PI_SR:
890     case PO_SR:
891     case MC_SR:
892         r = &s->bm_regs[GET_BM (index)];
893         r->sr |= val & ~(SR_RO_MASK | SR_WCLEAR_MASK);
894         update_sr (s, r, r->sr & ~(val & SR_WCLEAR_MASK));
895         dolog ("SR[%d] <- %#x (sr %#x)\n", GET_BM (index), val, r->sr);
896         break;
897     default:
898         dolog ("U nabm writeb %#x <- %#x\n", addr, val);
899         break;
900     }
901 }
902 
903 static void nabm_writew (void *opaque, uint32_t addr, uint32_t val)
904 {
905     AC97LinkState *s = opaque;
906     AC97BusMasterRegs *r = NULL;
907     uint32_t index = addr;
908     switch (index) {
909     case PI_SR:
910     case PO_SR:
911     case MC_SR:
912         r = &s->bm_regs[GET_BM (index)];
913         r->sr |= val & ~(SR_RO_MASK | SR_WCLEAR_MASK);
914         update_sr (s, r, r->sr & ~(val & SR_WCLEAR_MASK));
915         dolog ("SR[%d] <- %#x (sr %#x)\n", GET_BM (index), val, r->sr);
916         break;
917     default:
918         dolog ("U nabm writew %#x <- %#x\n", addr, val);
919         break;
920     }
921 }
922 
923 static void nabm_writel (void *opaque, uint32_t addr, uint32_t val)
924 {
925     AC97LinkState *s = opaque;
926     AC97BusMasterRegs *r = NULL;
927     uint32_t index = addr;
928     switch (index) {
929     case PI_BDBAR:
930     case PO_BDBAR:
931     case MC_BDBAR:
932         r = &s->bm_regs[GET_BM (index)];
933         r->bdbar = val & ~3;
934         dolog ("BDBAR[%d] <- %#x (bdbar %#x)\n",
935                GET_BM (index), val, r->bdbar);
936         break;
937     case GLOB_CNT:
938         if (val & GC_WR)
939             warm_reset (s);
940         if (val & GC_CR)
941             cold_reset (s);
942         if (!(val & (GC_WR | GC_CR)))
943             s->glob_cnt = val & GC_VALID_MASK;
944         dolog ("glob_cnt <- %#x (glob_cnt %#x)\n", val, s->glob_cnt);
945         break;
946     case GLOB_STA:
947         s->glob_sta &= ~(val & GS_WCLEAR_MASK);
948         s->glob_sta |= (val & ~(GS_WCLEAR_MASK | GS_RO_MASK)) & GS_VALID_MASK;
949         dolog ("glob_sta <- %#x (glob_sta %#x)\n", val, s->glob_sta);
950         break;
951     default:
952         dolog ("U nabm writel %#x <- %#x\n", addr, val);
953         break;
954     }
955 }
956 
957 static int write_audio (AC97LinkState *s, AC97BusMasterRegs *r,
958                         int max, int *stop)
959 {
960     uint8_t tmpbuf[4096];
961     uint32_t addr = r->bd.addr;
962     uint32_t temp = r->picb << 1;
963     uint32_t written = 0;
964     int to_copy = 0;
965     temp = MIN (temp, max);
966 
967     if (!temp) {
968         *stop = 1;
969         return 0;
970     }
971 
972     while (temp) {
973         int copied;
974         to_copy = MIN (temp, sizeof (tmpbuf));
975         pci_dma_read (&s->dev, addr, tmpbuf, to_copy);
976         copied = AUD_write (s->voice_po, tmpbuf, to_copy);
977         dolog ("write_audio max=%x to_copy=%x copied=%x\n",
978                max, to_copy, copied);
979         if (!copied) {
980             *stop = 1;
981             break;
982         }
983         temp -= copied;
984         addr += copied;
985         written += copied;
986     }
987 
988     if (!temp) {
989         if (to_copy < 4) {
990             dolog ("whoops\n");
991             s->last_samp = 0;
992         }
993         else {
994             s->last_samp = *(uint32_t *) &tmpbuf[to_copy - 4];
995         }
996     }
997 
998     r->bd.addr = addr;
999     return written;
1000 }
1001 
1002 static void write_bup (AC97LinkState *s, int elapsed)
1003 {
1004     dolog ("write_bup\n");
1005     if (!(s->bup_flag & BUP_SET)) {
1006         if (s->bup_flag & BUP_LAST) {
1007             int i;
1008             uint8_t *p = s->silence;
1009             for (i = 0; i < sizeof (s->silence) / 4; i++, p += 4) {
1010                 *(uint32_t *) p = s->last_samp;
1011             }
1012         }
1013         else {
1014             memset (s->silence, 0, sizeof (s->silence));
1015         }
1016         s->bup_flag |= BUP_SET;
1017     }
1018 
1019     while (elapsed) {
1020         int temp = MIN (elapsed, sizeof (s->silence));
1021         while (temp) {
1022             int copied = AUD_write (s->voice_po, s->silence, temp);
1023             if (!copied)
1024                 return;
1025             temp -= copied;
1026             elapsed -= copied;
1027         }
1028     }
1029 }
1030 
1031 static int read_audio (AC97LinkState *s, AC97BusMasterRegs *r,
1032                        int max, int *stop)
1033 {
1034     uint8_t tmpbuf[4096];
1035     uint32_t addr = r->bd.addr;
1036     uint32_t temp = r->picb << 1;
1037     uint32_t nread = 0;
1038     int to_copy = 0;
1039     SWVoiceIn *voice = (r - s->bm_regs) == MC_INDEX ? s->voice_mc : s->voice_pi;
1040 
1041     temp = MIN (temp, max);
1042 
1043     if (!temp) {
1044         *stop = 1;
1045         return 0;
1046     }
1047 
1048     while (temp) {
1049         int acquired;
1050         to_copy = MIN (temp, sizeof (tmpbuf));
1051         acquired = AUD_read (voice, tmpbuf, to_copy);
1052         if (!acquired) {
1053             *stop = 1;
1054             break;
1055         }
1056         pci_dma_write (&s->dev, addr, tmpbuf, acquired);
1057         temp -= acquired;
1058         addr += acquired;
1059         nread += acquired;
1060     }
1061 
1062     r->bd.addr = addr;
1063     return nread;
1064 }
1065 
1066 static void transfer_audio (AC97LinkState *s, int index, int elapsed)
1067 {
1068     AC97BusMasterRegs *r = &s->bm_regs[index];
1069     int stop = 0;
1070 
1071     if (s->invalid_freq[index]) {
1072         AUD_log ("ac97", "attempt to use voice %d with invalid frequency %d\n",
1073                  index, s->invalid_freq[index]);
1074         return;
1075     }
1076 
1077     if (r->sr & SR_DCH) {
1078         if (r->cr & CR_RPBM) {
1079             switch (index) {
1080             case PO_INDEX:
1081                 write_bup (s, elapsed);
1082                 break;
1083             }
1084         }
1085         return;
1086     }
1087 
1088     while ((elapsed >> 1) && !stop) {
1089         int temp;
1090 
1091         if (!r->bd_valid) {
1092             dolog ("invalid bd\n");
1093             fetch_bd (s, r);
1094         }
1095 
1096         if (!r->picb) {
1097             dolog ("fresh bd %d is empty %#x %#x\n",
1098                    r->civ, r->bd.addr, r->bd.ctl_len);
1099             if (r->civ == r->lvi) {
1100                 r->sr |= SR_DCH; /* CELV? */
1101                 s->bup_flag = 0;
1102                 break;
1103             }
1104             r->sr &= ~SR_CELV;
1105             r->civ = r->piv;
1106             r->piv = (r->piv + 1) % 32;
1107             fetch_bd (s, r);
1108             return;
1109         }
1110 
1111         switch (index) {
1112         case PO_INDEX:
1113             temp = write_audio (s, r, elapsed, &stop);
1114             elapsed -= temp;
1115             r->picb -= (temp >> 1);
1116             break;
1117 
1118         case PI_INDEX:
1119         case MC_INDEX:
1120             temp = read_audio (s, r, elapsed, &stop);
1121             elapsed -= temp;
1122             r->picb -= (temp >> 1);
1123             break;
1124         }
1125 
1126         if (!r->picb) {
1127             uint32_t new_sr = r->sr & ~SR_CELV;
1128 
1129             if (r->bd.ctl_len & BD_IOC) {
1130                 new_sr |= SR_BCIS;
1131             }
1132 
1133             if (r->civ == r->lvi) {
1134                 dolog ("Underrun civ (%d) == lvi (%d)\n", r->civ, r->lvi);
1135 
1136                 new_sr |= SR_LVBCI | SR_DCH | SR_CELV;
1137                 stop = 1;
1138                 s->bup_flag = (r->bd.ctl_len & BD_BUP) ? BUP_LAST : 0;
1139             }
1140             else {
1141                 r->civ = r->piv;
1142                 r->piv = (r->piv + 1) % 32;
1143                 fetch_bd (s, r);
1144             }
1145 
1146             update_sr (s, r, new_sr);
1147         }
1148     }
1149 }
1150 
1151 static void pi_callback (void *opaque, int avail)
1152 {
1153     transfer_audio (opaque, PI_INDEX, avail);
1154 }
1155 
1156 static void mc_callback (void *opaque, int avail)
1157 {
1158     transfer_audio (opaque, MC_INDEX, avail);
1159 }
1160 
1161 static void po_callback (void *opaque, int free)
1162 {
1163     transfer_audio (opaque, PO_INDEX, free);
1164 }
1165 
1166 static const VMStateDescription vmstate_ac97_bm_regs = {
1167     .name = "ac97_bm_regs",
1168     .version_id = 1,
1169     .minimum_version_id = 1,
1170     .fields = (VMStateField[]) {
1171         VMSTATE_UINT32 (bdbar, AC97BusMasterRegs),
1172         VMSTATE_UINT8 (civ, AC97BusMasterRegs),
1173         VMSTATE_UINT8 (lvi, AC97BusMasterRegs),
1174         VMSTATE_UINT16 (sr, AC97BusMasterRegs),
1175         VMSTATE_UINT16 (picb, AC97BusMasterRegs),
1176         VMSTATE_UINT8 (piv, AC97BusMasterRegs),
1177         VMSTATE_UINT8 (cr, AC97BusMasterRegs),
1178         VMSTATE_UINT32 (bd_valid, AC97BusMasterRegs),
1179         VMSTATE_UINT32 (bd.addr, AC97BusMasterRegs),
1180         VMSTATE_UINT32 (bd.ctl_len, AC97BusMasterRegs),
1181         VMSTATE_END_OF_LIST ()
1182     }
1183 };
1184 
1185 static int ac97_post_load (void *opaque, int version_id)
1186 {
1187     uint8_t active[LAST_INDEX];
1188     AC97LinkState *s = opaque;
1189 
1190     record_select (s, mixer_load (s, AC97_Record_Select));
1191     set_volume (s, AC97_Master_Volume_Mute,
1192                 mixer_load (s, AC97_Master_Volume_Mute));
1193     set_volume (s, AC97_PCM_Out_Volume_Mute,
1194                 mixer_load (s, AC97_PCM_Out_Volume_Mute));
1195     set_volume (s, AC97_Record_Gain_Mute,
1196                 mixer_load (s, AC97_Record_Gain_Mute));
1197 
1198     active[PI_INDEX] = !!(s->bm_regs[PI_INDEX].cr & CR_RPBM);
1199     active[PO_INDEX] = !!(s->bm_regs[PO_INDEX].cr & CR_RPBM);
1200     active[MC_INDEX] = !!(s->bm_regs[MC_INDEX].cr & CR_RPBM);
1201     reset_voices (s, active);
1202 
1203     s->bup_flag = 0;
1204     s->last_samp = 0;
1205     return 0;
1206 }
1207 
1208 static bool is_version_2 (void *opaque, int version_id)
1209 {
1210     return version_id == 2;
1211 }
1212 
1213 static const VMStateDescription vmstate_ac97 = {
1214     .name = "ac97",
1215     .version_id = 3,
1216     .minimum_version_id = 2,
1217     .post_load = ac97_post_load,
1218     .fields = (VMStateField[]) {
1219         VMSTATE_PCI_DEVICE (dev, AC97LinkState),
1220         VMSTATE_UINT32 (glob_cnt, AC97LinkState),
1221         VMSTATE_UINT32 (glob_sta, AC97LinkState),
1222         VMSTATE_UINT32 (cas, AC97LinkState),
1223         VMSTATE_STRUCT_ARRAY (bm_regs, AC97LinkState, 3, 1,
1224                               vmstate_ac97_bm_regs, AC97BusMasterRegs),
1225         VMSTATE_BUFFER (mixer_data, AC97LinkState),
1226         VMSTATE_UNUSED_TEST (is_version_2, 3),
1227         VMSTATE_END_OF_LIST ()
1228     }
1229 };
1230 
1231 static uint64_t nam_read(void *opaque, hwaddr addr, unsigned size)
1232 {
1233     if ((addr / size) > 256) {
1234         return -1;
1235     }
1236 
1237     switch (size) {
1238     case 1:
1239         return nam_readb(opaque, addr);
1240     case 2:
1241         return nam_readw(opaque, addr);
1242     case 4:
1243         return nam_readl(opaque, addr);
1244     default:
1245         return -1;
1246     }
1247 }
1248 
1249 static void nam_write(void *opaque, hwaddr addr, uint64_t val,
1250                       unsigned size)
1251 {
1252     if ((addr / size) > 256) {
1253         return;
1254     }
1255 
1256     switch (size) {
1257     case 1:
1258         nam_writeb(opaque, addr, val);
1259         break;
1260     case 2:
1261         nam_writew(opaque, addr, val);
1262         break;
1263     case 4:
1264         nam_writel(opaque, addr, val);
1265         break;
1266     }
1267 }
1268 
1269 static const MemoryRegionOps ac97_io_nam_ops = {
1270     .read = nam_read,
1271     .write = nam_write,
1272     .impl = {
1273         .min_access_size = 1,
1274         .max_access_size = 4,
1275     },
1276     .endianness = DEVICE_LITTLE_ENDIAN,
1277 };
1278 
1279 static uint64_t nabm_read(void *opaque, hwaddr addr, unsigned size)
1280 {
1281     if ((addr / size) > 64) {
1282         return -1;
1283     }
1284 
1285     switch (size) {
1286     case 1:
1287         return nabm_readb(opaque, addr);
1288     case 2:
1289         return nabm_readw(opaque, addr);
1290     case 4:
1291         return nabm_readl(opaque, addr);
1292     default:
1293         return -1;
1294     }
1295 }
1296 
1297 static void nabm_write(void *opaque, hwaddr addr, uint64_t val,
1298                       unsigned size)
1299 {
1300     if ((addr / size) > 64) {
1301         return;
1302     }
1303 
1304     switch (size) {
1305     case 1:
1306         nabm_writeb(opaque, addr, val);
1307         break;
1308     case 2:
1309         nabm_writew(opaque, addr, val);
1310         break;
1311     case 4:
1312         nabm_writel(opaque, addr, val);
1313         break;
1314     }
1315 }
1316 
1317 
1318 static const MemoryRegionOps ac97_io_nabm_ops = {
1319     .read = nabm_read,
1320     .write = nabm_write,
1321     .impl = {
1322         .min_access_size = 1,
1323         .max_access_size = 4,
1324     },
1325     .endianness = DEVICE_LITTLE_ENDIAN,
1326 };
1327 
1328 static void ac97_on_reset (DeviceState *dev)
1329 {
1330     AC97LinkState *s = container_of(dev, AC97LinkState, dev.qdev);
1331 
1332     reset_bm_regs (s, &s->bm_regs[0]);
1333     reset_bm_regs (s, &s->bm_regs[1]);
1334     reset_bm_regs (s, &s->bm_regs[2]);
1335 
1336     /*
1337      * Reset the mixer too. The Windows XP driver seems to rely on
1338      * this. At least it wants to read the vendor id before it resets
1339      * the codec manually.
1340      */
1341     mixer_reset (s);
1342 }
1343 
1344 static void ac97_realize(PCIDevice *dev, Error **errp)
1345 {
1346     AC97LinkState *s = AC97(dev);
1347     uint8_t *c = s->dev.config;
1348 
1349     /* TODO: no need to override */
1350     c[PCI_COMMAND] = 0x00;      /* pcicmd pci command rw, ro */
1351     c[PCI_COMMAND + 1] = 0x00;
1352 
1353     /* TODO: */
1354     c[PCI_STATUS] = PCI_STATUS_FAST_BACK;      /* pcists pci status rwc, ro */
1355     c[PCI_STATUS + 1] = PCI_STATUS_DEVSEL_MEDIUM >> 8;
1356 
1357     c[PCI_CLASS_PROG] = 0x00;      /* pi programming interface ro */
1358 
1359     /* TODO set when bar is registered. no need to override. */
1360     /* nabmar native audio mixer base address rw */
1361     c[PCI_BASE_ADDRESS_0] = PCI_BASE_ADDRESS_SPACE_IO;
1362     c[PCI_BASE_ADDRESS_0 + 1] = 0x00;
1363     c[PCI_BASE_ADDRESS_0 + 2] = 0x00;
1364     c[PCI_BASE_ADDRESS_0 + 3] = 0x00;
1365 
1366     /* TODO set when bar is registered. no need to override. */
1367       /* nabmbar native audio bus mastering base address rw */
1368     c[PCI_BASE_ADDRESS_0 + 4] = PCI_BASE_ADDRESS_SPACE_IO;
1369     c[PCI_BASE_ADDRESS_0 + 5] = 0x00;
1370     c[PCI_BASE_ADDRESS_0 + 6] = 0x00;
1371     c[PCI_BASE_ADDRESS_0 + 7] = 0x00;
1372 
1373     c[PCI_INTERRUPT_LINE] = 0x00;      /* intr_ln interrupt line rw */
1374     c[PCI_INTERRUPT_PIN] = 0x01;      /* intr_pn interrupt pin ro */
1375 
1376     memory_region_init_io (&s->io_nam, OBJECT(s), &ac97_io_nam_ops, s,
1377                            "ac97-nam", 1024);
1378     memory_region_init_io (&s->io_nabm, OBJECT(s), &ac97_io_nabm_ops, s,
1379                            "ac97-nabm", 256);
1380     pci_register_bar (&s->dev, 0, PCI_BASE_ADDRESS_SPACE_IO, &s->io_nam);
1381     pci_register_bar (&s->dev, 1, PCI_BASE_ADDRESS_SPACE_IO, &s->io_nabm);
1382     AUD_register_card ("ac97", &s->card);
1383     ac97_on_reset(DEVICE(s));
1384 }
1385 
1386 static void ac97_exit(PCIDevice *dev)
1387 {
1388     AC97LinkState *s = AC97(dev);
1389 
1390     AUD_close_in(&s->card, s->voice_pi);
1391     AUD_close_out(&s->card, s->voice_po);
1392     AUD_close_in(&s->card, s->voice_mc);
1393     AUD_remove_card(&s->card);
1394 }
1395 
1396 static Property ac97_properties[] = {
1397     DEFINE_AUDIO_PROPERTIES(AC97LinkState, card),
1398     DEFINE_PROP_END_OF_LIST (),
1399 };
1400 
1401 static void ac97_class_init (ObjectClass *klass, void *data)
1402 {
1403     DeviceClass *dc = DEVICE_CLASS (klass);
1404     PCIDeviceClass *k = PCI_DEVICE_CLASS (klass);
1405 
1406     k->realize = ac97_realize;
1407     k->exit = ac97_exit;
1408     k->vendor_id = PCI_VENDOR_ID_INTEL;
1409     k->device_id = PCI_DEVICE_ID_INTEL_82801AA_5;
1410     k->revision = 0x01;
1411     k->class_id = PCI_CLASS_MULTIMEDIA_AUDIO;
1412     set_bit(DEVICE_CATEGORY_SOUND, dc->categories);
1413     dc->desc = "Intel 82801AA AC97 Audio";
1414     dc->vmsd = &vmstate_ac97;
1415     device_class_set_props(dc, ac97_properties);
1416     dc->reset = ac97_on_reset;
1417 }
1418 
1419 static const TypeInfo ac97_info = {
1420     .name          = TYPE_AC97,
1421     .parent        = TYPE_PCI_DEVICE,
1422     .instance_size = sizeof (AC97LinkState),
1423     .class_init    = ac97_class_init,
1424     .interfaces = (InterfaceInfo[]) {
1425         { INTERFACE_CONVENTIONAL_PCI_DEVICE },
1426         { },
1427     },
1428 };
1429 
1430 static void ac97_register_types (void)
1431 {
1432     type_register_static (&ac97_info);
1433     deprecated_register_soundhw("ac97", "Intel 82801AA AC97 Audio",
1434                                 0, TYPE_AC97);
1435 }
1436 
1437 type_init (ac97_register_types)
1438