[U-Boot] [PATCH 1/2] pci/layerscape: add support for LS1043A PCIe LUT register access

[Gong Qianyu]

From: Mingkai Hu <Mingkai.Hu at freescale.com>

The endian and base address of PEX LUT register region is different
between Chassis 2 and Chassis 3, so move the base address definition
to chassis specific header file and add pex_lut_* functions to access
LUT register.

Signed-off-by: Mingkai Hu <Mingkai.Hu at freescale.com>
Signed-off-by: Gong Qianyu <Qianyu.Gong at freescale.com>
---
 arch/arm/include/asm/arch-fsl-layerscape/config.h      | 2 ++
 arch/arm/include/asm/arch-fsl-layerscape/immap_lsch2.h | 4 ++++
 arch/arm/include/asm/arch-fsl-layerscape/immap_lsch3.h | 4 ++++
 arch/arm/include/asm/arch-fsl-layerscape/soc.h         | 8 ++++++++
 drivers/pci/pcie_layerscape.c                          | 8 ++------
 5 files changed, 20 insertions(+), 6 deletions(-)

diff --git a/arch/arm/include/asm/arch-fsl-layerscape/config.h b/arch/arm/include/asm/arch-fsl-layerscape/config.h
index 87bb937..fe361da 100644
--- a/arch/arm/include/asm/arch-fsl-layerscape/config.h
+++ b/arch/arm/include/asm/arch-fsl-layerscape/config.h
@@ -44,6 +44,7 @@
 #define CONFIG_SYS_FSL_CCSR_SCFG_LE
 #define CONFIG_SYS_FSL_ESDHC_LE
 #define CONFIG_SYS_FSL_IFC_LE
+#define CONFIG_SYS_FSL_PEX_LUT_LE
 
 #define CONFIG_SYS_MEMAC_LITTLE_ENDIAN
 
@@ -113,6 +114,7 @@
 #define CONFIG_SYS_FSL_WDOG_BE
 #define CONFIG_SYS_FSL_DSPI_BE
 #define CONFIG_SYS_FSL_QSPI_BE
+#define CONFIG_SYS_FSL_PEX_LUT_BE
 
 #define QE_MURAM_SIZE		0x6000UL
 #define MAX_QE_RISC		1
diff --git a/arch/arm/include/asm/arch-fsl-layerscape/immap_lsch2.h b/arch/arm/include/asm/arch-fsl-layerscape/immap_lsch2.h
index d941437..f52815d 100644
--- a/arch/arm/include/asm/arch-fsl-layerscape/immap_lsch2.h
+++ b/arch/arm/include/asm/arch-fsl-layerscape/immap_lsch2.h
@@ -60,6 +60,10 @@
 #define CONFIG_SYS_PCIE1_PHYS_ADDR		0x4000000000ULL
 #define CONFIG_SYS_PCIE2_PHYS_ADDR		0x4800000000ULL
 #define CONFIG_SYS_PCIE3_PHYS_ADDR		0x5000000000ULL
+/* LUT registers */
+#define PCIE_LUT_BASE				0x10000
+#define PCIE_LUT_LCTRL0				0x7F8
+#define PCIE_LUT_DBG				0x7FC
 
 /* TZ Address Space Controller Definitions */
 #define TZASC1_BASE			0x01100000	/* as per CCSR map. */
diff --git a/arch/arm/include/asm/arch-fsl-layerscape/immap_lsch3.h b/arch/arm/include/asm/arch-fsl-layerscape/immap_lsch3.h
index 6a70d44..e700af0 100644
--- a/arch/arm/include/asm/arch-fsl-layerscape/immap_lsch3.h
+++ b/arch/arm/include/asm/arch-fsl-layerscape/immap_lsch3.h
@@ -78,6 +78,10 @@
 #define CONFIG_SYS_PCIE2_PHYS_ADDR		0x1200000000ULL
 #define CONFIG_SYS_PCIE3_PHYS_ADDR		0x1400000000ULL
 #define CONFIG_SYS_PCIE4_PHYS_ADDR		0x1600000000ULL
+/* LUT registers */
+#define PCIE_LUT_BASE				0x80000
+#define PCIE_LUT_LCTRL0				0x7F8
+#define PCIE_LUT_DBG				0x7FC
 
 /* Device Configuration */
 #define DCFG_BASE		0x01e00000
diff --git a/arch/arm/include/asm/arch-fsl-layerscape/soc.h b/arch/arm/include/asm/arch-fsl-layerscape/soc.h
index 5ed456e..8691906 100644
--- a/arch/arm/include/asm/arch-fsl-layerscape/soc.h
+++ b/arch/arm/include/asm/arch-fsl-layerscape/soc.h
@@ -23,6 +23,14 @@
 #define scfg_out32(a, v)   out_be32(a, v)
 #endif
 
+#ifdef CONFIG_SYS_FSL_PEX_LUT_LE
+#define pex_lut_in32(a)       in_le32(a)
+#define pex_lut_out32(a, v)   out_le32(a, v)
+#elif defined(CONFIG_SYS_FSL_PEX_LUT_BE)
+#define pex_lut_in32(a)       in_be32(a)
+#define pex_lut_out32(a, v)   out_be32(a, v)
+#endif
+
 struct cpu_type {
 	char name[15];
 	u32 soc_ver;
diff --git a/drivers/pci/pcie_layerscape.c b/drivers/pci/pcie_layerscape.c
index 4cee038..8e34313 100644
--- a/drivers/pci/pcie_layerscape.c
+++ b/drivers/pci/pcie_layerscape.c
@@ -14,6 +14,7 @@
 #ifdef CONFIG_FSL_LAYERSCAPE
 #include <asm/arch/fdt.h>
 #endif
+#include <asm/arch/soc.h>
 
 #ifndef CONFIG_SYS_PCI_MEMORY_BUS
 #define CONFIG_SYS_PCI_MEMORY_BUS CONFIG_SYS_SDRAM_BASE
@@ -57,11 +58,6 @@
 #define PCIE_ATU_FUNC(x)		(((x) & 0x7) << 16)
 #define PCIE_ATU_UPPER_TARGET		0x91C
 
-/* LUT registers */
-#define PCIE_LUT_BASE		0x80000
-#define PCIE_LUT_LCTRL0		0x7F8
-#define PCIE_LUT_DBG		0x7FC
-
 #define PCIE_DBI_RO_WR_EN	0x8bc
 
 #define PCIE_LINK_CAP		0x7c
@@ -162,7 +158,7 @@ static int ls_pcie_link_state(struct ls_pcie *pcie)
 {
 	u32 state;
 
-	state = readl(pcie->dbi + PCIE_LUT_BASE + PCIE_LUT_DBG) &
+	state = pex_lut_in32(pcie->dbi + PCIE_LUT_BASE + PCIE_LUT_DBG) &
 		LTSSM_STATE_MASK;
 	if (state < LTSSM_PCIE_L0) {
 		debug("....PCIe link error. LTSSM=0x%02x.\n", state);
-- 
2.1.0.27.g96db324