MorphZone

Georg

# 224

Butterfly

Posts: 91 from 2004/4/7

The AC97 driver (https://github.com/aros-development-team/AROS/tree/master/workbench/devs/AHI/Drivers/ac97) works too and works better than SB128 after similiar endianess hacks to QEMU's ac97.c:

hw/audio/ac97.c/fetch_bd():

Code:


+#if 0
     r->bd.addr = le32_to_cpu (*(uint32_t *) &b[0]) & ~3;
     r->bd.ctl_len = le32_to_cpu (*(uint32_t *) &b[4]);
+#else
+    r->bd.addr = be32_to_cpu (*(uint32_t *) &b[0]) & ~3;
+    r->bd.ctl_len = be32_to_cpu (*(uint32_t *) &b[4]);
+#endif

hw/audio/ac97.c/ac_97_io_nam_ops struct:

Code:


-    .endianness = DEVICE_LITTE_ENDIAN,
+    .endianness = DEVICE_BIG_ENDIAN,

hw/audio/ac97.c/ac97_io_nabm_ops struct:

Code:


-    .endianness = DEVICE_LITTE_ENDIAN,
+    .endianness = DEVICE_BIG_ENDIAN,

hw/audio/ac97.c/write_audio() before AUD_write() call:

Code:


{
  unsigned short sample;
  int ii;
  
  for(ii = 0; ii < to_copy / 2; ii++)
  {
     sample = ((unsigned short *)tmpbuf)[ii];
     ((unsigned short *)tmpbuf)[ii] = bswap16(sample);
  }
}

Code:


./qemu-system-ppc -machine sam460ex -rtc base=localtime   -drive if=none,id=cd,file=aros-sam440-ppc.iso,format=raw -device ide-cd,drive=cd,bus=ide.1 -device ac97,audiodev=snd0 -audiodev pa,id=snd0

»11.02.22 - 08:51