[U-Boot] [PATCH 4/5] fsl: csu: add an API to disable all R/W permission to PCIe

[Zhiqiang Hou]

From: Hou Zhiqiang <Zhiqiang.Hou at nxp.com>

Signed-off-by: Hou Zhiqiang <Zhiqiang.Hou at nxp.com>
---
 .../include/asm/arch-fsl-layerscape/ns_access.h    |  1 +
 board/freescale/common/ns_access.c                 | 28 ++++++++++++++++++++++
 include/fsl_csu.h                                  |  1 +
 3 files changed, 30 insertions(+)

diff --git a/arch/arm/include/asm/arch-fsl-layerscape/ns_access.h b/arch/arm/include/asm/arch-fsl-layerscape/ns_access.h
index db76066..f46f1d8 100644
--- a/arch/arm/include/asm/arch-fsl-layerscape/ns_access.h
+++ b/arch/arm/include/asm/arch-fsl-layerscape/ns_access.h
@@ -6,6 +6,7 @@
 
 #ifndef __FSL_NS_ACCESS_H_
 #define __FSL_NS_ACCESS_H_
+#include <fsl_csu.h>
 
 enum csu_cslx_ind {
 	CSU_CSLX_PCIE2_IO = 0,
diff --git a/board/freescale/common/ns_access.c b/board/freescale/common/ns_access.c
index c3d7a5e..80e4b61 100644
--- a/board/freescale/common/ns_access.c
+++ b/board/freescale/common/ns_access.c
@@ -8,6 +8,7 @@
 #include <asm/io.h>
 #include <fsl_csu.h>
 #include <asm/arch/ns_access.h>
+#include <asm/arch/fsl_serdes.h>
 
 void set_devices_ns_access(struct csu_ns_dev *ns_dev, u16 val)
 {
@@ -40,3 +41,30 @@ void enable_layerscape_ns_access(void)
 {
 	enable_devices_ns_access(ns_dev, ARRAY_SIZE(ns_dev));
 }
+
+void disable_pcie_ns_access(int pcie)
+{
+	switch (pcie) {
+#ifdef CONFIG_PCIE1
+	case PCIE1:
+		set_devices_ns_access(&ns_dev[CSU_CSLX_PCIE1], 0);
+		set_devices_ns_access(&ns_dev[CSU_CSLX_PCIE1_IO], 0);
+		return;
+#endif
+#ifdef CONFIG_PCIE2
+	case PCIE2:
+		set_devices_ns_access(&ns_dev[CSU_CSLX_PCIE2], 0);
+		set_devices_ns_access(&ns_dev[CSU_CSLX_PCIE2_IO], 0);
+		return;
+#endif
+#ifdef CONFIG_PCIE3
+	case PCIE3:
+		set_devices_ns_access(&ns_dev[CSU_CSLX_PCIE3], 0);
+		set_devices_ns_access(&ns_dev[CSU_CSLX_PCIE3_IO], 0);
+		return;
+#endif
+	default:
+		debug("The PCIE%d doesn't exist!\n", pcie);
+		return;
+	}
+}
diff --git a/include/fsl_csu.h b/include/fsl_csu.h
index 57a9985..42ca433 100644
--- a/include/fsl_csu.h
+++ b/include/fsl_csu.h
@@ -31,5 +31,6 @@ struct csu_ns_dev {
 
 void enable_layerscape_ns_access(void);
 void set_devices_ns_access(struct csu_ns_dev *ns_dev, u16 val);
+void disable_pcie_ns_access(int pcie);
 
 #endif
-- 
2.1.0.27.g96db324