MIPS: XBurst: use mach-specific debug_ll setup

Ingenic JZ4755 SoC (JZ4750D family) has three UARTs.
So we can give to the user choose which one of them
to use for low level debug (debug_ll) output.

Also this commit adapts the only JZ4755 board
(Ritmix RZX50) for using the new debug_ll port
selection.

Signed-off-by: Antony Pavlov <antonynpavlov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

arch/mips/boards/rzx50/include/board/debug_ll.h

@@ -18,9 +18,6 @@
 #ifndef __INCLUDE_RZX50_BOARD_DEBUG_LL_H__
 #define __INCLUDE_RZX50_BOARD_DEBUG_LL_H__
 
-#include <mach/jz4750d_regs.h>
-
-#define DEBUG_LL_UART_ADDR	UART1_BASE
-#define DEBUG_LL_UART_SHIFT	2
+#include <mach/debug_ll_jz4750d.h>
 
 #endif  /* __INCLUDE_RZX50_BOARD_DEBUG_LL_H__ */

arch/mips/mach-xburst/Kconfig

@@ -17,6 +17,24 @@ config BOARD_RZX50
 
 endchoice
 
+if DEBUG_LL
+if CPU_JZ4755
+choice
+	prompt "DEBUG_LL port"
+
+config JZ4750D_DEBUG_LL_UART0
+	bool "UART0"
+
+config JZ4750D_DEBUG_LL_UART1
+	bool "UART1"
+
+config JZ4750D_DEBUG_LL_UART2
+	bool "UART2"
+
+endchoice
+endif # CPU_JZ4755
+endif # DEBUG_LL
+
 source arch/mips/boards/rzx50/Kconfig
 
 endif

arch/mips/mach-xburst/include/mach/debug_ll_jz4750d.h

@@ -0,0 +1,37 @@
+/*
+ * Copyright (C) 2013 Antony Pavlov <antonynpavlov@gmail.com>
+ *
+ * This file is part of barebox.
+ * See file CREDITS for list of people who contributed to this project.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2
+ * as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ */
+
+#ifndef __INCLUDE_DEBUG_LL_JZ4750D_H__
+#define __INCLUDE_DEBUG_LL_JZ4750D_H__
+
+#include <mach/jz4750d_regs.h>
+
+#ifdef CONFIG_JZ4750D_DEBUG_LL_UART0
+#define DEBUG_LL_UART_ADDR	UART0_BASE
+#endif
+
+#ifdef CONFIG_JZ4750D_DEBUG_LL_UART1
+#define DEBUG_LL_UART_ADDR	UART1_BASE
+#endif
+
+#ifdef CONFIG_JZ4750D_DEBUG_LL_UART2
+#define DEBUG_LL_UART_ADDR	UART2_BASE
+#endif
+
+#define DEBUG_LL_UART_SHIFT	2
+
+#endif /* __INCLUDE_DEBUG_LL_JZ4750D_H__ */

arch/mips/mach-xburst/include/mach/jz4750d_regs.h

@@ -16,7 +16,9 @@
 #define TCU_BASE        0xb0002000
 #define WDT_BASE        0xb0002000
 #define RTC_BASE        0xb0003000
+#define UART0_BASE      0xb0030000
 #define UART1_BASE      0xb0031000
+#define UART2_BASE      0xb0032000
 
 /*************************************************************************
  * TCU (Timer Counter Unit)