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[POWERPC] 4xx: Implement udbg_getc() for 440 

Implement udbg_getc() for 440, which fixes xmon input.

Signed-off-by: Hollis Blanchard <hollisb@us.ibm.com>
Acked-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>
hifive-unleashed-5.1
Hollis Blanchard 2007-09-17 05:56:47 -05:00 committed by Josh Boyer
parent 504ca43e5e
commit 70dea47da1
1 changed files with 11 additions and 0 deletions
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11
arch/powerpc/kernel/udbg_16550.c
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@ -206,11 +206,22 @@ static void udbg_44x_as1_putc(char c)
}
}
static int udbg_44x_as1_getc(void)
{
if (udbg_comport) {
while ((as1_readb(&udbg_comport->lsr) & LSR_DR) == 0)
; /* wait for char */
return as1_readb(&udbg_comport->rbr);
}
return -1;
}
void __init udbg_init_44x_as1(void)
{
udbg_comport =
(volatile struct NS16550 __iomem *)PPC44x_EARLY_DEBUG_VIRTADDR;
udbg_putc = udbg_44x_as1_putc;
udbg_getc = udbg_44x_as1_getc;
}
#endif /* CONFIG_PPC_EARLY_DEBUG_44x */