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Use external clock in wm8750 slave mode.

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git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@4325 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
balrog 2008-05-04 12:15:51 +00:00
parent 762abf6774
commit af83e09e9e
3 changed files with 57 additions and 9 deletions
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16
hw/musicpal.c
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@ -298,6 +298,20 @@ static void audio_callback(void *opaque, int free_out, int free_in)
qemu_irq_raise(s->irq);
}
static void musicpal_audio_clock_update(musicpal_audio_state *s)
{
int rate;
if (s->playback_mode & MP_AUDIO_CLOCK_24MHZ)
rate = 24576000 / 64; /* 24.576MHz */
else
rate = 11289600 / 64; /* 11.2896MHz */
rate /= ((s->clock_div >> 8) & 0xff) + 1;
wm8750_set_bclk_in(s->wm, rate / 2);
}
static uint32_t musicpal_audio_read(void *opaque, target_phys_addr_t offset)
{
musicpal_audio_state *s = opaque;
@ -339,12 +353,14 @@ static void musicpal_audio_write(void *opaque, target_phys_addr_t offset,
s->play_pos = 0;
}
s->playback_mode = value;
musicpal_audio_clock_update(s);
break;
case MP_AUDIO_CLOCK_DIV:
s->clock_div = value;
s->last_free = 0;
s->play_pos = 0;
musicpal_audio_clock_update(s);
break;
case MP_AUDIO_IRQ_STATUS: