[U-Boot] [PATCH] ppc4xx: Kilauea: Add CPLD version detection and EBC reconfiguration

[Stefan Roese]

A newer CPLD version on the 405EX evaluation board requires a different
EBC controller setup for the CPLD register access. This patch now adds
a CPLD version detection for Kilauea and code to reconfigure the EBC
controller (chip select 2) for the new CPLD.

Additionally the CPLD version is printed upon bootup:

Board: Kilauea - AMCC PPC405EX Evaluation Board (CPLD rev. 0)

Signed-off-by: Stefan Roese <sr at denx.de>
Cc: Zhang Bao Quan <bqzhang at udtech.com.cn>
---
 board/amcc/kilauea/kilauea.c |   40 +++++++++++++++++++++++++++++++++++++++-
 include/configs/kilauea.h    |   26 ++++++++++++++++++++++----
 2 files changed, 61 insertions(+), 5 deletions(-)

diff --git a/board/amcc/kilauea/kilauea.c b/board/amcc/kilauea/kilauea.c
index 5cd822a..964b2d0 100644
--- a/board/amcc/kilauea/kilauea.c
+++ b/board/amcc/kilauea/kilauea.c
@@ -39,6 +39,37 @@ DECLARE_GLOBAL_DATA_PTR;
 
 extern flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS]; /* info for FLASH chips	*/
 
+static int board_cpld_version(void)
+{
+	u32 cpld;
+
+	cpld = in_be32((void *)CONFIG_SYS_FPGA_FIFO_BASE);
+	if ((cpld & CONFIG_SYS_FPGA_MAGIC_MASK) != CONFIG_SYS_FPGA_MAGIC) {
+		/*
+		 * Magic not found -> "old" CPLD revision which needs
+		 * the "old" EBC configuration
+		 */
+		mtebc(PB2AP, EBC_BXAP_BME_ENABLED | EBC_BXAP_FWT_ENCODE(5) |
+		      EBC_BXAP_BWT_ENCODE(0) | EBC_BXAP_BCE_DISABLE |
+		      EBC_BXAP_BCT_2TRANS | EBC_BXAP_CSN_ENCODE(0) |
+		      EBC_BXAP_OEN_ENCODE(0) | EBC_BXAP_WBN_ENCODE(3) |
+		      EBC_BXAP_WBF_ENCODE(0) | EBC_BXAP_TH_ENCODE(4) |
+		      EBC_BXAP_RE_DISABLED | EBC_BXAP_SOR_DELAYED |
+		      EBC_BXAP_BEM_WRITEONLY | EBC_BXAP_PEN_DISABLED);
+
+		/*
+		 * Return 0 for "old" CPLD version
+		 */
+		return 0;
+	}
+
+	/*
+	 * Magic found -> "new" CPLD revision which needs no new
+	 * EBC configuration
+	 */
+	return (cpld & CONFIG_SYS_FPGA_VER_MASK) >> 8;
+}
+
 /*
  * Board early initialization function
  */
@@ -209,6 +240,13 @@ int board_early_init_f (void)
 	mtsdr(SDR0_PFC1, val);
 
 	/*
+	 * The CPLD version detection has to be the first access to
+	 * the CPLD, so we need to make this access this early and
+	 * save the CPLD version for later.
+	 */
+	gd->board_type = board_cpld_version();
+
+	/*
 	 * Configure FPGA register with PCIe reset
 	 */
 	out_be32((void *)CONFIG_SYS_FPGA_BASE, 0xff570cc4);	/* assert PCIe reset */
@@ -276,7 +314,7 @@ int checkboard (void)
 		puts(", serial# ");
 		puts(s);
 	}
-	putc('\n');
+	printf(" (CPLD rev. %ld)\n", gd->board_type);
 
 	return (0);
 }
diff --git a/include/configs/kilauea.h b/include/configs/kilauea.h
index 965599c..9359627 100644
--- a/include/configs/kilauea.h
+++ b/include/configs/kilauea.h
@@ -47,6 +47,7 @@
 
 #define CONFIG_BOARD_EARLY_INIT_F 1		/* Call board_early_init_f */
 #define CONFIG_MISC_INIT_R	1		/* Call misc_init_r	*/
+#define CONFIG_BOARD_TYPES
 #define CONFIG_BOARD_EMAC_COUNT
 
 /*-----------------------------------------------------------------------
@@ -522,9 +523,22 @@
 #define CONFIG_SYS_EBC_PB1CR		(CONFIG_SYS_NAND_ADDR | 0x1e000)
 #endif
 
-/* Memory Bank 2 (FPGA) initialization						*/
-#define CONFIG_SYS_EBC_PB2AP           0x9400C800
-#define CONFIG_SYS_EBC_PB2CR		(CONFIG_SYS_FPGA_BASE | 0x18000)
+/* Memory Bank 2 (FPGA) initialization					*/
+#define CONFIG_SYS_EBC_PB2AP		(EBC_BXAP_BME_ENABLED |		\
+					 EBC_BXAP_FWT_ENCODE(6) |	\
+					 EBC_BXAP_BWT_ENCODE(1) |	\
+					 EBC_BXAP_BCE_DISABLE |		\
+					 EBC_BXAP_BCT_2TRANS |		\
+					 EBC_BXAP_CSN_ENCODE(0) |	\
+					 EBC_BXAP_OEN_ENCODE(0) |	\
+					 EBC_BXAP_WBN_ENCODE(3) |	\
+					 EBC_BXAP_WBF_ENCODE(1) |	\
+					 EBC_BXAP_TH_ENCODE(4) |	\
+					 EBC_BXAP_RE_DISABLED |		\
+					 EBC_BXAP_SOR_DELAYED |		\
+					 EBC_BXAP_BEM_WRITEONLY |	\
+					 EBC_BXAP_PEN_DISABLED)
+#define CONFIG_SYS_EBC_PB2CR	(CONFIG_SYS_FPGA_BASE | 0x18000)
 
 #define CONFIG_SYS_EBC_CFG		0x7FC00000 /*  EBC0_CFG */
 
@@ -573,7 +587,7 @@
  * Some Kilauea stuff..., mainly fpga registers
  */
 #define CONFIG_SYS_FPGA_REG_BASE		CONFIG_SYS_FPGA_BASE
-#define CONFIG_SYS_FPGA_FIFO_BASE		(in32(CONFIG_SYS_FPGA_BASE) | (1 << 10))
+#define CONFIG_SYS_FPGA_FIFO_BASE		(CONFIG_SYS_FPGA_BASE | (1 << 10))
 
 /* interrupt */
 #define CONFIG_SYS_FPGA_SLIC0_R_DPRAM_INT	0x80000000
@@ -604,4 +618,8 @@
 #define CONFIG_SYS_FPGA_USER_LED0		0x00000200
 #define CONFIG_SYS_FPGA_USER_LED1		0x00000100
 
+#define CONFIG_SYS_FPGA_MAGIC_MASK		0xffff0000
+#define CONFIG_SYS_FPGA_MAGIC			0xabcd
+#define CONFIG_SYS_FPGA_VER_MASK		0x0000ff00
+
 #endif	/* __CONFIG_H */
-- 
1.6.6.1