[U-Boot] [PATCH 04/14] armv7: Add workaround for USB erratum A-009007

[yinbo.zhu]

From: Suresh Gupta <suresh.gupta at freescale.com>

USB3PHY Observing Intermittent Failure in Rx
This patch is adding the erratum for LS1021.

Signed-off-by: Sriram Dash <sriram.dash at nxp.com>
Signed-off-by: Rajesh Bhagat <rajesh.bhagat at nxp.com>
Signed-off-by: yinbo.zhu <yinbo.zhu at nxp.com>
---
 arch/arm/cpu/armv7/ls102xa/Kconfig                |  1 +
 arch/arm/cpu/armv7/ls102xa/soc.c                  | 12 ++++++++++++
 arch/arm/include/asm/arch-ls102xa/immap_ls102xa.h |  5 +++++
 3 files changed, 18 insertions(+)

diff --git a/arch/arm/cpu/armv7/ls102xa/Kconfig b/arch/arm/cpu/armv7/ls102xa/Kconfig
index 92afe09..926903b 100644
--- a/arch/arm/cpu/armv7/ls102xa/Kconfig
+++ b/arch/arm/cpu/armv7/ls102xa/Kconfig
@@ -18,6 +18,7 @@ config ARCH_LS1021A
 	select SYS_FSL_ERRATUM_A009942
 	select SYS_FSL_ERRATUM_A009798
 	select SYS_FSL_ERRATUM_A008997
+	select SYS_FSL_ERRATUM_A009007
 
 menu "LS102xA architecture"
 	depends on ARCH_LS1021A
diff --git a/arch/arm/cpu/armv7/ls102xa/soc.c b/arch/arm/cpu/armv7/ls102xa/soc.c
index 19eb361..4754907 100644
--- a/arch/arm/cpu/armv7/ls102xa/soc.c
+++ b/arch/arm/cpu/armv7/ls102xa/soc.c
@@ -94,6 +94,17 @@ static void erratum_a008997(void)
 #endif /* CONFIG_SYS_FSL_ERRATUM_A008997 */
 }
 
+static void erratum_a009007(void)
+{
+#ifdef CONFIG_SYS_FSL_ERRATUM_A009007
+	u32 __iomem *usb_phy = (u32 __iomem *)USB_PHY_BASE;
+	writew(USB_PHY_RX_EQ_VAL_1, (u8 *)(usb_phy) + USB_PHY_RX_OVRD_IN_HI);
+	writew(USB_PHY_RX_EQ_VAL_2, (u8 *)(usb_phy) + USB_PHY_RX_OVRD_IN_HI);
+	writew(USB_PHY_RX_EQ_VAL_3, (u8 *)(usb_phy) + USB_PHY_RX_OVRD_IN_HI);
+	writew(USB_PHY_RX_EQ_VAL_4, (u8 *)(usb_phy) + USB_PHY_RX_OVRD_IN_HI);
+#endif /* CONFIG_SYS_FSL_ERRATUM_A009007 */
+}
+
 void s_init(void)
 {
 }
@@ -184,6 +195,7 @@ int arch_soc_init(void)
 	erratum_a009008();
 	erratum_a009798();
 	erratum_a008997();
+	erratum_a009007();
 	return 0;
 }
 
diff --git a/arch/arm/include/asm/arch-ls102xa/immap_ls102xa.h b/arch/arm/include/asm/arch-ls102xa/immap_ls102xa.h
index 5f05e0d..fc406f7 100644
--- a/arch/arm/include/asm/arch-ls102xa/immap_ls102xa.h
+++ b/arch/arm/include/asm/arch-ls102xa/immap_ls102xa.h
@@ -181,10 +181,15 @@ struct ccsr_gur {
 #define USB_PHY_MPLL_OVRD_IN_HI         0x0024
 #define USB_PHY_LEVEL_OVRD_IN           0x002a
 #define USB_PHY_TX_OVRD_IN_HI           0x2002
+#define USB_PHY_RX_OVRD_IN_HI           0x200c
 #define USB_PHY_TX_OVRD_DRV_LO_VAL      0x784C
 #define USB_PHY_MPLL_OVRD_IN_HI_VAL     0x0080
 #define USB_PHY_LEVEL_OVRD_IN_VAL       0xA9A5
 #define USB_PHY_TX_OVRD_IN_HI_VAL       0x0003
+#define USB_PHY_RX_EQ_VAL_1             0x0000
+#define USB_PHY_RX_EQ_VAL_2             0x8000
+#define USB_PHY_RX_EQ_VAL_3             0x8004
+#define USB_PHY_RX_EQ_VAL_4             0x800C
 
 
 /* Supplemental Configuration Unit */
-- 
2.1.0.27.g96db324