[PATCH 3/3] ARM: uniphier: detect the base of micro support card at run-time

[Masahiro Yamada]

The base address 0x43f00000 is no longer true for the future SoC.
Extract the base address from the device tree.

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

 arch/arm/mach-uniphier/micro-support-card.c | 43 +++++++++++++++------
 1 file changed, 31 insertions(+), 12 deletions(-)

diff --git a/arch/arm/mach-uniphier/micro-support-card.c 
b/arch/arm/mach-uniphier/micro-support-card.c
index 46879019fdaa..c71470a20429 100644
--- a/arch/arm/mach-uniphier/micro-support-card.c
+++ b/arch/arm/mach-uniphier/micro-support-card.c
@@ -1,39 +1,58 @@
 // SPDX-License-Identifier: GPL-2.0+
 /*
  * Copyright (C) 2012-2015 Panasonic Corporation
- * Copyright (C) 2015-2016 Socionext Inc.
+ * Copyright (C) 2015-2020 Socionext Inc.
  *   Author: Masahiro Yamada <yamada.masah...@socionext.com>
  */
 
 #include <common.h>
+#include <dm/of.h>
+#include <fdt_support.h>
 #include <linux/ctype.h>
 #include <linux/io.h>
 
 #include "micro-support-card.h"
 
-#define MICRO_SUPPORT_CARD_BASE                0x43f00000
-#define SMC911X_BASE                   ((MICRO_SUPPORT_CARD_BASE) + 0x00000)
-#define LED_BASE                       ((MICRO_SUPPORT_CARD_BASE) + 0x90000)
-#define NS16550A_BASE                  ((MICRO_SUPPORT_CARD_BASE) + 0xb0000)
-#define MICRO_SUPPORT_CARD_RESET       ((MICRO_SUPPORT_CARD_BASE) + 0xd0034)
-#define MICRO_SUPPORT_CARD_REVISION    ((MICRO_SUPPORT_CARD_BASE) + 0xd00E0)
+#define SMC911X_OFFSET                 0x00000
+#define LED_OFFSET                     0x90000
+#define NS16550A_OFFSET                        0xb0000
+#define MICRO_SUPPORT_CARD_RESET       0xd0034
+#define MICRO_SUPPORT_CARD_REVISION    0xd00e0
 
 static bool support_card_found;
+static void __iomem *support_card_base;
 
 static void support_card_detect(void)
 {
        DECLARE_GLOBAL_DATA_PTR;
        const void *fdt = gd->fdt_blob;
        int offset;
+       u64 addr, addr2;
 
        offset = fdt_node_offset_by_compatible(fdt, 0, "smsc,lan9118");
        if (offset < 0)
                return;
 
+       addr = fdt_get_base_address(fdt, offset);
+       if (addr == OF_BAD_ADDR)
+               return;
+       addr -= SMC911X_OFFSET;
+
        offset = fdt_node_offset_by_compatible(fdt, 0, "ns16550a");
        if (offset < 0)
                return;
 
+       addr2 = fdt_get_base_address(fdt, offset);
+       if (addr2 == OF_BAD_ADDR)
+               return;
+       addr2 -= NS16550A_OFFSET;
+
+       /* sanity check */
+       if (addr != addr2)
+               return;
+
+       support_card_base = ioremap(addr, 0x100000);
+
        support_card_found = true;
 }
 
@@ -45,19 +64,19 @@ static void support_card_detect(void)
  */
 static void support_card_reset_deassert(void)
 {
-       writel(0x00010000, MICRO_SUPPORT_CARD_RESET);
+       writel(0x00010000, support_card_base + MICRO_SUPPORT_CARD_RESET);
 }
 
 static void support_card_reset(void)
 {
-       writel(0x00020003, MICRO_SUPPORT_CARD_RESET);
+       writel(0x00020003, support_card_base + MICRO_SUPPORT_CARD_RESET);
 }
 
 static int support_card_show_revision(void)
 {
        u32 revision;
 
-       revision = readl(MICRO_SUPPORT_CARD_REVISION);
+       revision = readl(support_card_base + MICRO_SUPPORT_CARD_REVISION);
        revision &= 0xff;
 
        /* revision 3.6.x card changed the revision format */
@@ -94,7 +113,7 @@ int board_eth_init(bd_t *bis)
        if (!support_card_found)
                return 0;
 
-       return smc911x_initialize(0, SMC911X_BASE);
+       return smc911x_initialize(0, (unsigned long)support_card_base + 
SMC911X_OFFSET);
 }
 #endif
 
@@ -264,5 +283,5 @@ void led_puts(const char *s)
                        s++;
        }
 
-       writel(~val, LED_BASE);
+       writel(~val, support_card_base + LED_OFFSET);
 }
-- 
2.17.1