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Diffstat (limited to 'arch/powerpc/kernel/udbg_16550.c')
-rw-r--r--arch/powerpc/kernel/udbg_16550.c60
1 files changed, 50 insertions, 10 deletions
diff --git a/arch/powerpc/kernel/udbg_16550.c b/arch/powerpc/kernel/udbg_16550.c
index 7b7da8cfd5e8..0362a891e54e 100644
--- a/arch/powerpc/kernel/udbg_16550.c
+++ b/arch/powerpc/kernel/udbg_16550.c
@@ -48,14 +48,21 @@ struct NS16550 {
static struct NS16550 __iomem *udbg_comport;
-static void udbg_550_putc(char c)
+static void udbg_550_flush(void)
{
if (udbg_comport) {
while ((in_8(&udbg_comport->lsr) & LSR_THRE) == 0)
/* wait for idle */;
- out_8(&udbg_comport->thr, c);
+ }
+}
+
+static void udbg_550_putc(char c)
+{
+ if (udbg_comport) {
if (c == '\n')
udbg_550_putc('\r');
+ udbg_550_flush();
+ out_8(&udbg_comport->thr, c);
}
}
@@ -108,6 +115,7 @@ void udbg_init_uart(void __iomem *comport, unsigned int speed,
/* Clear & enable FIFOs */
out_8(&udbg_comport->fcr ,0x07);
udbg_putc = udbg_550_putc;
+ udbg_flush = udbg_550_flush;
udbg_getc = udbg_550_getc;
udbg_getc_poll = udbg_550_getc_poll;
}
@@ -149,14 +157,21 @@ unsigned int udbg_probe_uart_speed(void __iomem *comport, unsigned int clock)
}
#ifdef CONFIG_PPC_MAPLE
-void udbg_maple_real_putc(char c)
+void udbg_maple_real_flush(void)
{
if (udbg_comport) {
while ((real_readb(&udbg_comport->lsr) & LSR_THRE) == 0)
/* wait for idle */;
- real_writeb(c, &udbg_comport->thr); eieio();
+ }
+}
+
+void udbg_maple_real_putc(char c)
+{
+ if (udbg_comport) {
if (c == '\n')
udbg_maple_real_putc('\r');
+ udbg_maple_real_flush();
+ real_writeb(c, &udbg_comport->thr); eieio();
}
}
@@ -165,20 +180,28 @@ void __init udbg_init_maple_realmode(void)
udbg_comport = (struct NS16550 __iomem *)0xf40003f8;
udbg_putc = udbg_maple_real_putc;
+ udbg_flush = udbg_maple_real_flush;
udbg_getc = NULL;
udbg_getc_poll = NULL;
}
#endif /* CONFIG_PPC_MAPLE */
#ifdef CONFIG_PPC_PASEMI
-void udbg_pas_real_putc(char c)
+void udbg_pas_real_flush(void)
{
if (udbg_comport) {
while ((real_205_readb(&udbg_comport->lsr) & LSR_THRE) == 0)
/* wait for idle */;
- real_205_writeb(c, &udbg_comport->thr); eieio();
+ }
+}
+
+void udbg_pas_real_putc(char c)
+{
+ if (udbg_comport) {
if (c == '\n')
udbg_pas_real_putc('\r');
+ udbg_pas_real_flush();
+ real_205_writeb(c, &udbg_comport->thr); eieio();
}
}
@@ -187,6 +210,7 @@ void udbg_init_pas_realmode(void)
udbg_comport = (struct NS16550 __iomem *)0xfcff03f8UL;
udbg_putc = udbg_pas_real_putc;
+ udbg_flush = udbg_pas_real_flush;
udbg_getc = NULL;
udbg_getc_poll = NULL;
}
@@ -195,14 +219,21 @@ void udbg_init_pas_realmode(void)
#ifdef CONFIG_PPC_EARLY_DEBUG_44x
#include <platforms/44x/44x.h>
-static void udbg_44x_as1_putc(char c)
+static int udbg_44x_as1_flush(void)
{
if (udbg_comport) {
while ((as1_readb(&udbg_comport->lsr) & LSR_THRE) == 0)
/* wait for idle */;
- as1_writeb(c, &udbg_comport->thr); eieio();
+ }
+}
+
+static void udbg_44x_as1_putc(char c)
+{
+ if (udbg_comport) {
if (c == '\n')
udbg_44x_as1_putc('\r');
+ udbg_44x_as1_flush();
+ as1_writeb(c, &udbg_comport->thr); eieio();
}
}
@@ -222,19 +253,27 @@ void __init udbg_init_44x_as1(void)
(struct NS16550 __iomem *)PPC44x_EARLY_DEBUG_VIRTADDR;
udbg_putc = udbg_44x_as1_putc;
+ udbg_flush = udbg_44x_as1_flush;
udbg_getc = udbg_44x_as1_getc;
}
#endif /* CONFIG_PPC_EARLY_DEBUG_44x */
#ifdef CONFIG_PPC_EARLY_DEBUG_40x
-static void udbg_40x_real_putc(char c)
+static void udbg_40x_real_flush(void)
{
if (udbg_comport) {
while ((real_readb(&udbg_comport->lsr) & LSR_THRE) == 0)
/* wait for idle */;
- real_writeb(c, &udbg_comport->thr); eieio();
+ }
+}
+
+static void udbg_40x_real_putc(char c)
+{
+ if (udbg_comport) {
if (c == '\n')
udbg_40x_real_putc('\r');
+ udbg_40x_real_flush();
+ real_writeb(c, &udbg_comport->thr); eieio();
}
}
@@ -254,6 +293,7 @@ void __init udbg_init_40x_realmode(void)
CONFIG_PPC_EARLY_DEBUG_40x_PHYSADDR;
udbg_putc = udbg_40x_real_putc;
+ udbg_flush = udbg_40x_real_flush;
udbg_getc = udbg_40x_real_getc;
udbg_getc_poll = NULL;
}