From 018dd2c26fc77bb1c0c77d1475f4140139a83ecf Mon Sep 17 00:00:00 2001
From: chenxing <chenxing@rock-chips.com>
Date: Thu, 26 Sep 2013 12:09:27 +0800
Subject: [PATCH] rk3026: add efuse support

---
 arch/arm/mach-rk2928/include/mach/io.h |  1 +
 arch/arm/mach-rk2928/io.c              |  1 +
 arch/arm/mach-rk3026/clock_data.c      |  3 ++
 arch/arm/plat-rk/efuse.c               | 41 ++++++++++++++++++++++++++
 arch/arm/plat-rk/include/plat/efuse.h  |  5 ++++
 5 files changed, 51 insertions(+)

diff --git a/arch/arm/mach-rk2928/include/mach/io.h b/arch/arm/mach-rk2928/include/mach/io.h
index 6ed2a61a4cba..7f49841a92ae 100755
--- a/arch/arm/mach-rk2928/include/mach/io.h
+++ b/arch/arm/mach-rk2928/include/mach/io.h
@@ -183,6 +183,7 @@
 
 #define RK2928_EFUSE_PHYS       0x20090000
 #define RK2928_EFUSE_SIZE       SZ_4K
+#define RK2928_EFUSE_BASE       RK2928_IO_TO_VIRT1(RK2928_EFUSE_PHYS)
 
 #define GIC_CPU_BASE            RK2928_GICC_BASE
 #define GIC_DIST_BASE           RK2928_GICD_BASE
diff --git a/arch/arm/mach-rk2928/io.c b/arch/arm/mach-rk2928/io.c
index 900b12adc0ad..c45dd64f2cbf 100755
--- a/arch/arm/mach-rk2928/io.c
+++ b/arch/arm/mach-rk2928/io.c
@@ -51,6 +51,7 @@ static struct map_desc rk2928_io_desc[] __initdata = {
 	RK2928_DEVICE(DDR_PHY),
 	RK2928_DEVICE(RKI2C0),
 	RK2928_DEVICE(RKI2C1),
+	RK2928_DEVICE(EFUSE),
 };
 
 void __init rk2928_map_common_io(void)
diff --git a/arch/arm/mach-rk3026/clock_data.c b/arch/arm/mach-rk3026/clock_data.c
index 94c4ccd566ab..4b979a70fbb5 100755
--- a/arch/arm/mach-rk3026/clock_data.c
+++ b/arch/arm/mach-rk3026/clock_data.c
@@ -2879,6 +2879,7 @@ static void __init rk2928_clock_common_init(unsigned long gpll_rate, unsigned lo
 
 	//rk_dump_clock_info();
 }
+#include <plat/efuse.h>
 void __init _rk2928_clock_data_init(unsigned long gpll, unsigned long cpll, int flags)
 {
 	struct clk_lookup *clk;
@@ -2895,6 +2896,8 @@ void __init _rk2928_clock_data_init(unsigned long gpll, unsigned long cpll, int
 		clk_register(clk->clk);
 	}
 
+	rk_efuse_init();
+
 	CLKDATA_DBG("clk_recalculate_root_clocks_nolock\n");
 	div_clk_for_pll_init();
 	clk_recalculate_root_clocks_nolock();
diff --git a/arch/arm/plat-rk/efuse.c b/arch/arm/plat-rk/efuse.c
index 8584964f60d8..c4fe7b9610f8 100644
--- a/arch/arm/plat-rk/efuse.c
+++ b/arch/arm/plat-rk/efuse.c
@@ -17,6 +17,11 @@
 #define efuse_writel(val, offset)	writel_relaxed(val, RK30_EFUSE_BASE + offset)
 #endif
 
+#if defined(CONFIG_ARCH_RK3026)
+#define efuse_readl(offset)             readl_relaxed(RK2928_EFUSE_BASE + offset)
+#define efuse_writel(val, offset)       writel_relaxed(val, RK2928_EFUSE_BASE + offset)
+#endif
+
 u8 efuse_buf[32 + 1] = {0, 0};
 
 static int efuse_readregs(u32 addr, u32 length, u8 *buf)
@@ -59,7 +64,38 @@ static int efuse_readregs(u32 addr, u32 length, u8 *buf)
 
 void rk_efuse_init(void)
 {
+#if defined(CONFIG_ARCH_RK3026)
+	u8 tmp_buf[32];
+	int i, j, err = 0;
+
+	efuse_readregs(0x0, 32, efuse_buf);
+
+	/*
+	 * i = 10,	need time = 2,860,875	ns
+	 * i = 100,	need time = 27,327,000	ns
+	 */
+	for (i = 0; i < 10; i++){
+		efuse_readregs(0x0, 32, tmp_buf);
+		for (j = 0; j < 32; j++){
+			if (efuse_buf[j] != tmp_buf[j]){
+				printk(KERN_WARNING ":%s:rk3026 efuse bit err\n", __func__);
+				efuse_readregs(0x0, 32, efuse_buf);
+				i = 0;
+				err++;
+				break;
+			}
+		}
+
+		if (err >= 500) {
+			printk(KERN_ERR "%s:rk3026 get efuse err\n", __func__);
+			efuse_buf[5] = 0x00;	/* set default SOC version */
+			efuse_buf[22] = 0x00;	/* clean msg about leakage */
+			break;
+		}
+	}
+#else
 	efuse_readregs(0x0, 32, efuse_buf);
+#endif
 }
 
 int rk_pll_flag(void)
@@ -89,3 +125,8 @@ int rk3028_version_val(void)
 {
 	return efuse_buf[5];
 }
+
+int rk3026_version_val(void)
+{
+	return efuse_buf[5];
+}
diff --git a/arch/arm/plat-rk/include/plat/efuse.h b/arch/arm/plat-rk/include/plat/efuse.h
index 9583cc363c6a..bd7bf24897d0 100644
--- a/arch/arm/plat-rk/include/plat/efuse.h
+++ b/arch/arm/plat-rk/include/plat/efuse.h
@@ -4,7 +4,11 @@
 #include <asm/types.h>
 
 /* eFuse controller register */
+#if defined(CONFIG_ARCH_RK3026)
+#define EFUSE_A_SHIFT		(8)
+#else
 #define EFUSE_A_SHIFT		(6)
+#endif
 #define EFUSE_A_MASK		(0xFF)
 //#define EFUSE_PD		(1 << 5)
 //#define EFUSE_PS		(1 << 4)
@@ -22,5 +26,6 @@ int rk_pll_flag(void);
 int rk_tflag(void);
 int rk_leakage_val(void);
 int rk3028_version_val(void);
+int rk3026_version_val(void);
 
 #endif
-- 
2.34.1