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authorXiangfu Liu <xiangfu@sharism.cc>2012-07-09 08:44:47 (GMT)
committer Sebastian Huber <sebastian.huber@embedded-brains.de>2012-07-09 08:44:47 (GMT)
commitc5ba8ba72708f89ad37356a46e6cfe2a22794480 (patch)
treed9a99fb3818efc5f371d012ceb24bf8f6af83ed2
parent5b29a08d691c589b337a0446ca60263fe22d93db (diff)
downloadrtems-c5ba8ba72708f89ad37356a46e6cfe2a22794480.tar.bz2
bsps/lm32: PR2045: Add mic boost option
-rw-r--r--c/src/lib/libbsp/lm32/shared/milkymist_ac97/ac97.c24
1 files changed, 18 insertions, 6 deletions
diff --git a/c/src/lib/libbsp/lm32/shared/milkymist_ac97/ac97.c b/c/src/lib/libbsp/lm32/shared/milkymist_ac97/ac97.c
index 4862580..4f7b57e 100644
--- a/c/src/lib/libbsp/lm32/shared/milkymist_ac97/ac97.c
+++ b/c/src/lib/libbsp/lm32/shared/milkymist_ac97/ac97.c
@@ -314,6 +314,7 @@ static rtems_status_code ioctl_read_channel(void *buf,
unsigned int chan, int mono)
{
unsigned int *val = (unsigned int *)buf;
+ int mic_boost;
int codec;
int left, right;
@@ -326,12 +327,14 @@ static rtems_status_code ioctl_read_channel(void *buf,
return RTEMS_SUCCESSFUL;
}
if (mono) {
- right = left = 100-(((codec & 0x1f) + 1)*100)/32;
+ left = 100-(((codec & 0x1f) + 1)*100)/32;
+ mic_boost = (codec & (1 << 6)) >> 6;
+ *val = left | mic_boost << 8;
} else {
right = 100-(((codec & 0x1f) + 1)*100)/32;
left = 100-((((codec & 0x1f00) >> 8) + 1)*100)/32;
+ *val = left | (right << 8);
}
- *val = left | (right << 8);
return RTEMS_SUCCESSFUL;
}
@@ -339,21 +342,23 @@ static rtems_status_code ioctl_write_channel(void *buf,
unsigned int chan, int mono)
{
unsigned int *val = (unsigned int *)buf;
+ int mic_boost;
int left, right;
int codec;
rtems_status_code sc;
left = *val & 0xff;
left = (left*32)/100 - 1;
- if(left < 0)
+ if (left < 0)
left = 0;
- if (mono)
+ if (mono) {
+ mic_boost = *val >> 8;
right = 31;
- else {
+ } else {
right = (*val >> 8) & 0xff;
right = (right*32)/100 - 1;
- if(right < 0)
+ if (right < 0)
right = 0;
}
@@ -363,6 +368,13 @@ static rtems_status_code ioctl_write_channel(void *buf,
else
codec = (31-left) | ((31-right) << 8);
+ if (mono) {
+ if (mic_boost)
+ codec |= (1 << 6);
+ else
+ codec &= ~(1 << 6);
+ }
+
if (!write_cr(chan, codec))
sc = RTEMS_UNSATISFIED;
else