[U-Boot] [PATCH 2/6] Add FSL "Can use" framework

[Anton Vorontsov <avorontsov@ru.mvista.com>]

So far it's used for specifying whether we want to use FSL DR USB or
FSL eSDHC devices on MPC837X processors.

There are two more candidates for future use:
1. USB ULPI PHY vs. TSEC1 on MPC8315E-RDB boards;
2. Marvell vs. Vitesse PHYs on MPC8313E-RDB boards.

Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com>
---
 board/freescale/common/Makefile      |    1 +
 board/freescale/common/fsl_can_use.c |   30 ++++++++++++++++++++++++++++++
 include/fsl_can_use.h                |   32 ++++++++++++++++++++++++++++++++
 3 files changed, 63 insertions(+), 0 deletions(-)
 create mode 100644 board/freescale/common/fsl_can_use.c
 create mode 100644 include/fsl_can_use.h

diff --git a/board/freescale/common/Makefile b/board/freescale/common/Makefile
index 02a824d..d4e2009 100644
--- a/board/freescale/common/Makefile
+++ b/board/freescale/common/Makefile
@@ -29,6 +29,7 @@ endif
 
 LIB	= $(obj)lib$(VENDOR).a
 
+COBJS-y				+= fsl_can_use.o
 COBJS-${CONFIG_FSL_CADMUS}	+= cadmus.o
 COBJS-${CONFIG_FSL_VIA}		+= cds_via.o
 COBJS-${CONFIG_FSL_DIU_FB}	+= fsl_diu_fb.o fsl_logo_bmp.o
diff --git a/board/freescale/common/fsl_can_use.c b/board/freescale/common/fsl_can_use.c
new file mode 100644
index 0000000..17cc20f
--- /dev/null
+++ b/board/freescale/common/fsl_can_use.c
@@ -0,0 +1,30 @@
+/*
+ * Copyright (c) 2009 MontaVista Software, Inc.
+ *
+ * Author: Anton Vorontsov <avorontsov@ru.mvista.com>
+ *
+ * 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 <common.h>
+
+#if defined(CONFIG_MPC837X) && defined(CONFIG_USB_FSL_DR) && \
+		defined(CONFIG_FSL_ESDHC)
+int __fsl_can_use_dr_usb(void)
+{
+	const char *usb_or_esdhc = getenv("usb_or_esdhc");
+
+	if (!usb_or_esdhc || !strcmp(usb_or_esdhc, "usb"))
+		return 1;
+
+	if (!strcmp(usb_or_esdhc, "esdhc"))
+		return 0;
+
+	printf("WARNING: Wrong value for `usb_or_esdhc' environment variable: "
+	       "`%s', should be `usb' (default) or `esdhc'\n", usb_or_esdhc);
+	return 1;
+}
+#endif
diff --git a/include/fsl_can_use.h b/include/fsl_can_use.h
new file mode 100644
index 0000000..932bbc1
--- /dev/null
+++ b/include/fsl_can_use.h
@@ -0,0 +1,32 @@
+/*
+ * Copyright (c) 2009 MontaVista Software, Inc.
+ *
+ * Author: Anton Vorontsov <avorontsov@ru.mvista.com>
+ *
+ * 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.
+ */
+
+#ifndef __FSL_CAN_USE_H
+#define __FSL_CAN_USE_H
+
+#if defined(CONFIG_MPC837X) && defined(CONFIG_USB_FSL_DR) && \
+		defined(CONFIG_FSL_ESDHC)
+extern int __fsl_can_use_dr_usb(void);
+#define fsl_can_use_dr_usb __fsl_can_use_dr_usb
+
+static inline int __fsl_can_use_esdhc(void) { return !fsl_can_use_dr_usb(); }
+#define fsl_can_use_esdhc __fsl_can_use_esdhc
+#endif /* CONFIG_MPC837X && CONFIG_USB_FSL_DR && CONFIG_FSL_ESDHC */
+
+#ifndef fsl_can_use_dr_usb
+#define fsl_can_use_dr_usb() 1
+#endif
+
+#ifndef fsl_can_use_esdhc
+#define fsl_can_use_esdhc() 1
+#endif
+
+#endif /* __FSL_CAN_USE_H */
-- 
1.5.6.5