[POWERPC] Add uartlite boot console driver for the zImage wrapper

Signed-off-by: Grant Likely <[email protected]> Acked-by: Peter Korsgaard <[email protected]> Signed-off-by: Paul Mackerras <[email protected]>
chewitt · Apr 30, 2007 · 8b01653 · 8b01653
1 parent 8c38fc2
commit 8b01653
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Showing 3 changed files with 48 additions and 5 deletions.
diff --git a/arch/ppc/boot/common/misc-common.c b/arch/ppc/boot/common/misc-common.c
@@ -57,7 +57,8 @@ unsigned char *ISA_io = NULL;
 
 #if defined(CONFIG_SERIAL_CPM_CONSOLE) || defined(CONFIG_SERIAL_8250_CONSOLE) \
 	|| defined(CONFIG_SERIAL_MPC52xx_CONSOLE) \
-	|| defined(CONFIG_SERIAL_MPSC_CONSOLE)
+	|| defined(CONFIG_SERIAL_MPSC_CONSOLE) \
+	|| defined(CONFIG_SERIAL_UARTLITE_CONSOLE)
 extern unsigned long com_port;
 
 extern int serial_tstc(unsigned long com_port);
@@ -80,7 +81,8 @@ int tstc(void)
 {
 #if defined(CONFIG_SERIAL_CPM_CONSOLE) || defined(CONFIG_SERIAL_8250_CONSOLE) \
 	|| defined(CONFIG_SERIAL_MPC52xx_CONSOLE) \
-	|| defined(CONFIG_SERIAL_MPSC_CONSOLE)
+	|| defined(CONFIG_SERIAL_MPSC_CONSOLE) \
+	|| defined(CONFIG_SERIAL_UARTLITE_CONSOLE)
 	if(keyb_present)
 		return (CRT_tstc() || serial_tstc(com_port));
 	else
@@ -95,7 +97,8 @@ int getc(void)
 	while (1) {
 #if defined(CONFIG_SERIAL_CPM_CONSOLE) || defined(CONFIG_SERIAL_8250_CONSOLE) \
 	|| defined(CONFIG_SERIAL_MPC52xx_CONSOLE) \
-	|| defined(CONFIG_SERIAL_MPSC_CONSOLE)
+	|| defined(CONFIG_SERIAL_MPSC_CONSOLE) \
+	|| defined(CONFIG_SERIAL_UARTLITE_CONSOLE)
 		if (serial_tstc(com_port))
 			return (serial_getc(com_port));
 #endif /* serial console */
@@ -112,7 +115,8 @@ putc(const char c)
 
 #if defined(CONFIG_SERIAL_CPM_CONSOLE) || defined(CONFIG_SERIAL_8250_CONSOLE) \
 	|| defined(CONFIG_SERIAL_MPC52xx_CONSOLE) \
-	|| defined(CONFIG_SERIAL_MPSC_CONSOLE)
+	|| defined(CONFIG_SERIAL_MPSC_CONSOLE) \
+	|| defined(CONFIG_SERIAL_UARTLITE_CONSOLE)
 	serial_putc(com_port, c);
 	if ( c == '\n' )
 		serial_putc(com_port, '\r');
@@ -161,7 +165,8 @@ void puts(const char *s)
 	while ( ( c = *s++ ) != '\0' ) {
 #if defined(CONFIG_SERIAL_CPM_CONSOLE) || defined(CONFIG_SERIAL_8250_CONSOLE) \
 	|| defined(CONFIG_SERIAL_MPC52xx_CONSOLE) \
-	|| defined(CONFIG_SERIAL_MPSC_CONSOLE)
+	|| defined(CONFIG_SERIAL_MPSC_CONSOLE) \
+	|| defined(CONFIG_SERIAL_UARTLITE_CONSOLE)
 	        serial_putc(com_port, c);
 	        if ( c == '\n' ) serial_putc(com_port, '\r');
 #endif /* serial console */

diff --git a/arch/ppc/boot/simple/Makefile b/arch/ppc/boot/simple/Makefile
@@ -201,6 +201,7 @@ boot-$(CONFIG_8260)		+= m8260_tty.o
 endif
 boot-$(CONFIG_SERIAL_MPC52xx_CONSOLE)	+= mpc52xx_tty.o
 boot-$(CONFIG_SERIAL_MPSC_CONSOLE)	+= mv64x60_tty.o
+boot-$(CONFIG_SERIAL_UARTLITE_CONSOLE)	+= uartlite_tty.o
 
 LIBS				:= $(common)/lib.a $(bootlib)/lib.a
 ifeq ($(CONFIG_PPC_PREP),y)

diff --git a/arch/ppc/boot/simple/uartlite_tty.c b/arch/ppc/boot/simple/uartlite_tty.c
@@ -0,0 +1,37 @@
+/*
+ * Xilinx UARTLITE bootloader driver
+ *
+ * Copyright (c) 2007 Secret Lab Technologies Ltd.
+ *
+ * This program is free software; you can redistribute  it and/or modify it
+ * under  the terms of  the GNU General  Public License as published by the
+ * Free Software Foundation;  either version 2 of the  License, or (at your
+ * option) any later version.
+ */
+
+#include <linux/types.h>
+#include <asm/serial.h>
+#include <asm/io.h>
+#include <platforms/4xx/xparameters/xparameters.h>
+
+#define UARTLITE_BASEADDR ((void*)(XPAR_UARTLITE_0_BASEADDR))
+
+void
+serial_putc(unsigned long com_port, unsigned char c)
+{
+	while ((in_be32(UARTLITE_BASEADDR + 0x8) & 0x08) != 0); /* spin */
+	out_be32(UARTLITE_BASEADDR + 0x4, c);
+}
+
+unsigned char
+serial_getc(unsigned long com_port)
+{
+	while ((in_be32(UARTLITE_BASEADDR + 0x8) & 0x01) == 0); /* spin */
+	return in_be32(UARTLITE_BASEADDR);
+}
+
+int
+serial_tstc(unsigned long com_port)
+{
+	return ((in_be32(UARTLITE_BASEADDR + 0x8) & 0x01) != 0);
+}