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authorOlof Johansson <olof@lixom.net>2007-02-04 16:36:49 -0600
committerPaul Mackerras <paulus@samba.org>2007-02-07 14:03:22 +1100
commit39c870d5b503fa684198baf90bab2daa35ef0151 (patch)
tree0afdc842f7714cf47892512bb93ae5453bb6c34d /arch/powerpc/kernel/udbg_16550.c
parenta1fdf6940a2a3d3c7475755eba5881403473252d (diff)
[POWERPC] pasemi: UART udbg support
Early debug output for PA Semi UART. Uses the 2.05 CI real mode ops. Signed-off-by: Olof Johansson <olof@lixom.net> Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'arch/powerpc/kernel/udbg_16550.c')
-rw-r--r--arch/powerpc/kernel/udbg_16550.c24
1 files changed, 24 insertions, 0 deletions
diff --git a/arch/powerpc/kernel/udbg_16550.c b/arch/powerpc/kernel/udbg_16550.c
index 2d17f2b8eda7..e738f93b42fe 100644
--- a/arch/powerpc/kernel/udbg_16550.c
+++ b/arch/powerpc/kernel/udbg_16550.c
@@ -14,6 +14,8 @@
extern u8 real_readb(volatile u8 __iomem *addr);
extern void real_writeb(u8 data, volatile u8 __iomem *addr);
+extern u8 real_205_readb(volatile u8 __iomem *addr);
+extern void real_205_writeb(u8 data, volatile u8 __iomem *addr);
struct NS16550 {
/* this struct must be packed */
@@ -167,3 +169,25 @@ void __init udbg_init_maple_realmode(void)
udbg_getc_poll = NULL;
}
#endif /* CONFIG_PPC_MAPLE */
+
+#ifdef CONFIG_PPC_PASEMI
+void udbg_pas_real_putc(char c)
+{
+ if (udbg_comport) {
+ while ((real_205_readb(&udbg_comport->lsr) & LSR_THRE) == 0)
+ /* wait for idle */;
+ real_205_writeb(c, &udbg_comport->thr); eieio();
+ if (c == '\n')
+ udbg_pas_real_putc('\r');
+ }
+}
+
+void udbg_init_pas_realmode(void)
+{
+ udbg_comport = (volatile struct NS16550 __iomem *)0xfcff03f8;
+
+ udbg_putc = udbg_pas_real_putc;
+ udbg_getc = NULL;
+ udbg_getc_poll = NULL;
+}
+#endif /* CONFIG_PPC_MAPLE */