[PATCH 8/8] sunxi: Parameterize H616 DRAM code some more

[Jernej Skrabec <jernej.skrabec@gmail.com>]

Part of the code, previously known as "unknown feature" also doesn't
have constant values. They are derived from TPR0 parameter in vendor
DRAM code. Introduce that parameter here too, to ease adding new boards.

Signed-off-by: Jernej Skrabec <jernej.skrabec@gmail.com>
---
 .../include/asm/arch-sunxi/dram_sun50i_h616.h |  1 +
 arch/arm/mach-sunxi/Kconfig                   |  6 ++++
 arch/arm/mach-sunxi/dram_sun50i_h616.c        | 35 +++++++++++++++----
 3 files changed, 35 insertions(+), 7 deletions(-)

diff --git a/arch/arm/include/asm/arch-sunxi/dram_sun50i_h616.h b/arch/arm/include/asm/arch-sunxi/dram_sun50i_h616.h
index c7890c83391f..ff736bd88d10 100644
--- a/arch/arm/include/asm/arch-sunxi/dram_sun50i_h616.h
+++ b/arch/arm/include/asm/arch-sunxi/dram_sun50i_h616.h
@@ -158,6 +158,7 @@ struct dram_para {
 	u32 dx_dri;
 	u32 ca_dri;
 	u32 odt_en;
+	u32 tpr0;
 	u32 tpr10;
 	u32 tpr11;
 	u32 tpr12;
diff --git a/arch/arm/mach-sunxi/Kconfig b/arch/arm/mach-sunxi/Kconfig
index b050f0a56971..7858a7045f7e 100644
--- a/arch/arm/mach-sunxi/Kconfig
+++ b/arch/arm/mach-sunxi/Kconfig
@@ -73,6 +73,12 @@ config DRAM_SUN50I_H616_ODT_EN
 	help
 	  ODT EN value from vendor DRAM settings.
 
+config DRAM_SUN50I_H616_TPR0
+	hex "H616 DRAM TPR0 parameter"
+	default 0x0
+	help
+	  TPR0 value from vendor DRAM settings.
+
 config DRAM_SUN50I_H616_TPR10
 	hex "H616 DRAM TPR10 parameter"
 	help
diff --git a/arch/arm/mach-sunxi/dram_sun50i_h616.c b/arch/arm/mach-sunxi/dram_sun50i_h616.c
index df06cea42464..6d8f8d371bfe 100644
--- a/arch/arm/mach-sunxi/dram_sun50i_h616.c
+++ b/arch/arm/mach-sunxi/dram_sun50i_h616.c
@@ -808,15 +808,35 @@ static bool mctl_phy_init(struct dram_para *para)
 		writel(phy_init[i], &ptr[i]);
 
 	if (para->tpr10 & TPR10_UNKNOWN_FEAT0) {
+		if (para->tpr0 & BIT(30))
+			val = (para->tpr0 >> 7) & 0x3e;
+		else
+			val = (para->tpr10 >> 3) & 0x1e;
+
 		ptr = (u32 *)(SUNXI_DRAM_PHY0_BASE + 0x780);
 		for (i = 0; i < 32; i++)
-			writel(0x16, &ptr[i]);
-		writel(0xe, SUNXI_DRAM_PHY0_BASE + 0x78c);
-		writel(0xe, SUNXI_DRAM_PHY0_BASE + 0x7a4);
-		writel(0xe, SUNXI_DRAM_PHY0_BASE + 0x7b8);
-		writel(0x8, SUNXI_DRAM_PHY0_BASE + 0x7d4);
-		writel(0xe, SUNXI_DRAM_PHY0_BASE + 0x7dc);
-		writel(0xe, SUNXI_DRAM_PHY0_BASE + 0x7e0);
+			writel(val, &ptr[i]);
+
+		val = (para->tpr10 << 1) & 0x1e;
+		writel(val, SUNXI_DRAM_PHY0_BASE + 0x7dc);
+		writel(val, SUNXI_DRAM_PHY0_BASE + 0x7e0);
+
+		/* following configuration is DDR3 specific */
+		val = (para->tpr10 >> 7) & 0x1e;
+		writel(val, SUNXI_DRAM_PHY0_BASE + 0x7d4);
+		/*
+		 * TODO: Offsets 0x79c, 0x794 and 0x7e4 may need
+		 * to be set here. However, this doesn't seem to
+		 * be needed by any board seen in the wild for now.
+		 * It's not implemented because it would unnecessarily
+		 * introduce PARA2 and TPR2 options.
+		 */
+		if (para->tpr0 & BIT(31)) {
+			val = (para->tpr0 << 1) & 0x3e;
+			writel(val, SUNXI_DRAM_PHY0_BASE + 0x78c);
+			writel(val, SUNXI_DRAM_PHY0_BASE + 0x7a4);
+			writel(val, SUNXI_DRAM_PHY0_BASE + 0x7b8);
+		}
 	}
 
 	writel(0x80, SUNXI_DRAM_PHY0_BASE + 0x3dc);
@@ -1110,6 +1130,7 @@ unsigned long sunxi_dram_init(void)
 		.dx_dri = CONFIG_DRAM_SUN50I_H616_DX_DRI,
 		.ca_dri = CONFIG_DRAM_SUN50I_H616_CA_DRI,
 		.odt_en = CONFIG_DRAM_SUN50I_H616_ODT_EN,
+		.tpr0 = CONFIG_DRAM_SUN50I_H616_TPR0,
 		.tpr10 = CONFIG_DRAM_SUN50I_H616_TPR10,
 		.tpr11 = CONFIG_DRAM_SUN50I_H616_TPR11,
 		.tpr12 = CONFIG_DRAM_SUN50I_H616_TPR12,
-- 
2.38.1