ARM: uniphier: make boot_is_swapped() code optional

The planned new SoC does not have SBC (System Bus Controller) block.
Make boot_is_swapped() an optional hook.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>

arch/arm/mach-uniphier/boot-device/boot-device.c

@@ -23,6 +23,7 @@ struct uniphier_boot_device_info {
 	const unsigned int *boot_device_count;
 	int (*boot_device_is_usb)(u32 pinmon);
 	unsigned int (*boot_device_fixup)(unsigned int mode);
+	int (*boot_is_swapped)(void);
 	bool have_internal_stm;
 };
 
@@ -33,6 +34,7 @@ static const struct uniphier_boot_device_info uniphier_boot_device_info[] = {
 		.boot_device_sel_shift = 1,
 		.boot_device_table = uniphier_ld4_boot_device_table,
 		.boot_device_count = &uniphier_ld4_boot_device_count,
+		.boot_is_swapped = uniphier_sbc_boot_is_swapped,
 		.have_internal_stm = true,
 	},
 #endif
@@ -42,6 +44,7 @@ static const struct uniphier_boot_device_info uniphier_boot_device_info[] = {
 		.boot_device_sel_shift = 1,
 		.boot_device_table = uniphier_ld4_boot_device_table,
 		.boot_device_count = &uniphier_ld4_boot_device_count,
+		.boot_is_swapped = uniphier_sbc_boot_is_swapped,
 		.have_internal_stm = false,
 	},
 #endif
@@ -51,6 +54,7 @@ static const struct uniphier_boot_device_info uniphier_boot_device_info[] = {
 		.boot_device_sel_shift = 1,
 		.boot_device_table = uniphier_ld4_boot_device_table,
 		.boot_device_count = &uniphier_ld4_boot_device_count,
+		.boot_is_swapped = uniphier_sbc_boot_is_swapped,
 		.have_internal_stm = true,
 	},
 #endif
@@ -60,6 +64,7 @@ static const struct uniphier_boot_device_info uniphier_boot_device_info[] = {
 		.boot_device_sel_shift = 1,
 		.boot_device_table = uniphier_pro5_boot_device_table,
 		.boot_device_count = &uniphier_pro5_boot_device_count,
+		.boot_is_swapped = uniphier_sbc_boot_is_swapped,
 		.have_internal_stm = false,
 	},
 #endif
@@ -71,6 +76,7 @@ static const struct uniphier_boot_device_info uniphier_boot_device_info[] = {
 		.boot_device_count = &uniphier_pxs2_boot_device_count,
 		.boot_device_is_usb = uniphier_pxs2_boot_device_is_usb,
 		.boot_device_fixup = uniphier_pxs2_boot_device_fixup,
+		.boot_is_swapped = uniphier_sbc_boot_is_swapped,
 		.have_internal_stm = false,
 	},
 #endif
@@ -82,6 +88,7 @@ static const struct uniphier_boot_device_info uniphier_boot_device_info[] = {
 		.boot_device_count = &uniphier_pxs2_boot_device_count,
 		.boot_device_is_usb = uniphier_pxs2_boot_device_is_usb,
 		.boot_device_fixup = uniphier_pxs2_boot_device_fixup,
+		.boot_is_swapped = uniphier_sbc_boot_is_swapped,
 		.have_internal_stm = true,	/* STM on A-chip */
 	},
 #endif
@@ -92,6 +99,7 @@ static const struct uniphier_boot_device_info uniphier_boot_device_info[] = {
 		.boot_device_table = uniphier_ld11_boot_device_table,
 		.boot_device_count = &uniphier_ld11_boot_device_count,
 		.boot_device_is_usb = uniphier_ld11_boot_device_is_usb,
+		.boot_is_swapped = uniphier_sbc_boot_is_swapped,
 		.have_internal_stm = true,
 	},
 #endif
@@ -102,6 +110,7 @@ static const struct uniphier_boot_device_info uniphier_boot_device_info[] = {
 		.boot_device_table = uniphier_ld11_boot_device_table,
 		.boot_device_count = &uniphier_ld11_boot_device_count,
 		.boot_device_is_usb = uniphier_ld20_boot_device_is_usb,
+		.boot_is_swapped = uniphier_sbc_boot_is_swapped,
 		.have_internal_stm = true,
 	},
 #endif
@@ -112,6 +121,7 @@ static const struct uniphier_boot_device_info uniphier_boot_device_info[] = {
 		.boot_device_table = uniphier_pxs3_boot_device_table,
 		.boot_device_count = &uniphier_pxs3_boot_device_count,
 		.boot_device_is_usb = uniphier_pxs3_boot_device_is_usb,
+		.boot_is_swapped = uniphier_sbc_boot_is_swapped,
 		.have_internal_stm = false,
 	},
 #endif
@@ -125,7 +135,7 @@ static unsigned int __uniphier_boot_device_raw(
 	u32 pinmon;
 	unsigned int boot_sel;
 
-	if (boot_is_swapped())
+	if (info->boot_is_swapped && info->boot_is_swapped())
 		return BOOT_DEVICE_NOR;
 
 	pinmon = readl(SG_PINMON0);
@@ -208,7 +218,9 @@ static int do_pinmon(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 		printf("STB Micon: %s\n",
 		       uniphier_boot_from_backend() ? "OFF" : "ON");
 
-	printf("Boot Swap: %s\n", boot_is_swapped() ? "ON" : "OFF");
+	if (info->boot_is_swapped)
+		printf("Boot Swap: %s\n",
+		       info->boot_is_swapped() ? "ON" : "OFF");
 
 	pinmon = readl(SG_PINMON0);
 

arch/arm/mach-uniphier/sbc/Makefile

@@ -1,6 +1,6 @@
 # SPDX-License-Identifier: GPL-2.0+
 
-obj-					+= dummy.o
+obj-y					+= sbc-boot.o
 
 ifndef CONFIG_SPL_BUILD
 obj-y					+= sbc.o

arch/arm/mach-uniphier/sbc/sbc-boot.c

@@ -0,0 +1,13 @@
+// SPDX-License-Identifier: GPL-2.0+
+//
+// Copyright (C) 2011-2014 Panasonic Corporation
+// Copyright (C) 2015-2019 Socionext Inc.
+
+#include <linux/io.h>
+
+#include "sbc-regs.h"
+
+int uniphier_sbc_boot_is_swapped(void)
+{
+	return !(readl(SBBASE0) & SBBASE_BANK_ENABLE);
+}

arch/arm/mach-uniphier/sbc/sbc-regs.h

@@ -76,14 +76,7 @@
 
 #define PC0CTRL				0x598000c0
 
-#ifndef __ASSEMBLY__
-#include <linux/io.h>
-static inline int boot_is_swapped(void)
-{
-	return !(readl(SBBASE0) & SBBASE_BANK_ENABLE);
-}
-#endif
-
+int uniphier_sbc_boot_is_swapped(void);
 int uniphier_sbc_is_enabled(void);
 
 #endif	/* ARCH_SBC_REGS_H */

arch/arm/mach-uniphier/sbc/sbc.c

@@ -64,7 +64,7 @@ static void __uniphier_sbc_init(int savepin)
 		writel(SBCTRL2_ADMULTIPLX_MEM_VALUE, SBCTRL12);
 	}
 
-	if (boot_is_swapped()) {
+	if (uniphier_sbc_boot_is_swapped()) {
 		/*
 		 * Boot Swap On: boot from external NOR/SRAM
 		 * 0x42000000-0x43ffffff is a mirror of 0x40000000-0x41ffffff.