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hw/ac97: add support for volume control 

Combine output volume with Master and PCM registers values.
Use default values in mixer_reset ().
Set volume on post-load to update backend values.

v4,v5:
- fix some code style

Signed-off-by: Marc-Andr? Lureau <marcandre.lureau@redhat.com>
Signed-off-by: malc <av1474@comtv.ru>
This commit is contained in:
Marc-André Lureau 2012-04-17 14:32:39 +02:00 committed by malc
parent 5b72392603
commit 19677a380a
1 changed files with 81 additions and 0 deletions
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81
hw/ac97.c
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@ -436,6 +436,65 @@ static void reset_voices (AC97LinkState *s, uint8_t active[LAST_INDEX])
AUD_set_active_in (s->voice_mc, active[MC_INDEX]);
}
static void get_volume (uint16_t vol, uint16_t mask, int inverse,
int *mute, uint8_t *lvol, uint8_t *rvol)
{
*mute = (vol >> MUTE_SHIFT) & 1;
*rvol = (255 * (vol & mask)) / mask;
*lvol = (255 * ((vol >> 8) & mask)) / mask;
if (inverse) {
*rvol = 255 - *rvol;
*lvol = 255 - *lvol;
}
}
static void update_combined_volume_out (AC97LinkState *s)
{
uint8_t lvol, rvol, plvol, prvol;
int mute, pmute;
get_volume (mixer_load (s, AC97_Master_Volume_Mute), 0x3f, 1,
&mute, &lvol, &rvol);
/* FIXME: should be 1f according to spec */
get_volume (mixer_load (s, AC97_PCM_Out_Volume_Mute), 0x3f, 1,
&pmute, &plvol, &prvol);
mute = mute | pmute;
lvol = (lvol * plvol) / 255;
rvol = (rvol * prvol) / 255;
AUD_set_volume_out (s->voice_po, mute, lvol, rvol);
}
static void update_volume_in (AC97LinkState *s)
{
uint8_t lvol, rvol;
int mute;
get_volume (mixer_load (s, AC97_Record_Gain_Mute), 0x0f, 0,
&mute, &lvol, &rvol);
AUD_set_volume_in (s->voice_pi, mute, lvol, rvol);
}
static void set_volume (AC97LinkState *s, int index, uint32_t val)
{
mixer_store (s, index, val);
if (index == AC97_Master_Volume_Mute || index == AC97_PCM_Out_Volume_Mute) {
update_combined_volume_out (s);
} else if (index == AC97_Record_Gain_Mute) {
update_volume_in (s);
}
}
static void record_select (AC97LinkState *s, uint32_t val)
{
uint8_t rs = val & REC_MASK;
uint8_t ls = (val >> 8) & REC_MASK;
mixer_store (s, AC97_Record_Select, rs | (ls << 8));
}
static void mixer_reset (AC97LinkState *s)
{
uint8_t active[LAST_INDEX];
@ -470,6 +529,11 @@ static void mixer_reset (AC97LinkState *s)
mixer_store (s, AC97_PCM_LR_ADC_Rate , 0xbb80);
mixer_store (s, AC97_MIC_ADC_Rate , 0xbb80);
record_select (s, 0);
set_volume (s, AC97_Master_Volume_Mute, 0x8000);
set_volume (s, AC97_PCM_Out_Volume_Mute, 0x8808);
set_volume (s, AC97_Line_In_Volume_Mute, 0x8808);
reset_voices (s, active);
}
@ -528,6 +592,15 @@ static void nam_writew (void *opaque, uint32_t addr, uint32_t val)
val |= mixer_load (s, index) & 0xf;
mixer_store (s, index, val);
break;
case AC97_PCM_Out_Volume_Mute:
case AC97_Master_Volume_Mute:
case AC97_Record_Gain_Mute:
case AC97_Line_In_Volume_Mute:
set_volume (s, index, val);
break;
case AC97_Record_Select:
record_select (s, val);
break;
case AC97_Vendor_ID1:
case AC97_Vendor_ID2:
dolog ("Attempt to write vendor ID to %#x\n", val);
@ -1080,6 +1153,14 @@ static int ac97_post_load (void *opaque, int version_id)
uint8_t active[LAST_INDEX];
AC97LinkState *s = opaque;
record_select (s, mixer_load (s, AC97_Record_Select));
set_volume (s, AC97_Master_Volume_Mute,
mixer_load (s, AC97_Master_Volume_Mute));
set_volume (s, AC97_PCM_Out_Volume_Mute,
mixer_load (s, AC97_PCM_Out_Volume_Mute));
set_volume (s, AC97_Line_In_Volume_Mute,
mixer_load (s, AC97_Line_In_Volume_Mute));
active[PI_INDEX] = !!(s->bm_regs[PI_INDEX].cr & CR_RPBM);
active[PO_INDEX] = !!(s->bm_regs[PO_INDEX].cr & CR_RPBM);
active[MC_INDEX] = !!(s->bm_regs[MC_INDEX].cr & CR_RPBM);