ppc4xx: Update lwmon5 board support

This patch includes the following changes for the lwmon5 board support:

- Enable cache in SDRAM
- Use common EHCI driver instead of the PPC4xx specific OHCI driver
  This can be done since only high-speed devices are connected.
- Remove cached TLB entry again after ECC setup
- Use correct define for cache enabling
  (CONFIG_4xx_DCACHE instead of CONFIG_SYS_ENABLE_SDRAM_CACHE)
- Enable FIT image support

Signed-off-by: Stefan Roese <sr@denx.de>

board/lwmon5/sdram.c

@@ -45,10 +45,10 @@
  * memory.
  *
  * If at some time this restriction doesn't apply anymore, just define
- * CONFIG_SYS_ENABLE_SDRAM_CACHE in the board config file and this code should setup
+ * CONFIG_4xx_DCACHE in the board config file and this code should setup
  * everything correctly.
  */
-#ifdef CONFIG_SYS_ENABLE_SDRAM_CACHE
+#ifdef CONFIG_4xx_DCACHE
 #define MY_TLB_WORD2_I_ENABLE	0			/* enable caching on SDRAM */
 #else
 #define MY_TLB_WORD2_I_ENABLE	TLB_WORD2_I_ENABLE	/* disable caching on SDRAM */
@@ -220,18 +220,32 @@ phys_size_t initdram (int board_type)
 	program_tlb(0, CONFIG_SYS_SDRAM_BASE, CONFIG_SYS_MBYTES_SDRAM << 20,
 		    MY_TLB_WORD2_I_ENABLE);
 
+#if defined(CONFIG_DDR_ECC)
+#if defined(CONFIG_4xx_DCACHE)
+	/*
+	 * If ECC is enabled, initialize the parity bits.
+	 */
+	program_ecc(0, CONFIG_SYS_MBYTES_SDRAM << 20, 0);
+#else /* CONFIG_4xx_DCACHE */
 	/*
 	 * Setup 2nd TLB with same physical address but different virtual address
 	 * with cache enabled. This is done for fast ECC generation.
 	 */
 	program_tlb(0, CONFIG_SYS_DDR_CACHED_ADDR, CONFIG_SYS_MBYTES_SDRAM << 20, 0);
 
-#ifdef CONFIG_DDR_ECC
 	/*
 	 * If ECC is enabled, initialize the parity bits.
 	 */
 	program_ecc(CONFIG_SYS_DDR_CACHED_ADDR, CONFIG_SYS_MBYTES_SDRAM << 20, 0);
-#endif
+
+	/*
+	 * Now after initialization (auto-calibration and ECC generation)
+	 * remove the TLB entries with caches enabled and program again with
+	 * desired cache functionality
+	 */
+	remove_tlb(CONFIG_SYS_DDR_CACHED_ADDR, CONFIG_SYS_MBYTES_SDRAM << 20);
+#endif /* CONFIG_4xx_DCACHE */
+#endif /* CONFIG_DDR_ECC */
 
 	/*
 	 * Clear possible errors resulting from data-eye-search.

include/configs/lwmon5.h

@@ -43,6 +43,8 @@
 
 #define CONFIG_SYS_CLK_FREQ	33300000	/* external freq to pll	*/
 
+#define CONFIG_4xx_DCACHE		/* enable cache in SDRAM	*/
+
 #define CONFIG_BOARD_EARLY_INIT_F	/* Call board_early_init_f	*/
 #define CONFIG_BOARD_EARLY_INIT_R	/* Call board_early_init_r	*/
 #define CONFIG_BOARD_POSTCLK_INIT	/* Call board_postclk_init	*/
@@ -321,6 +323,8 @@
 /* Update size in "reg" property of NOR FLASH device tree nodes */
 #define CONFIG_FDT_FIXUP_NOR_FLASH_SIZE
 
+#define CONFIG_FIT			/* enable FIT image support	*/
+
 #define	CONFIG_POST_KEY_MAGIC	"3C+3E"	/* press F3 + F5 keys to force POST */
 
 #define	CONFIG_PREBOOT		"setenv bootdelay 15"
@@ -393,16 +397,18 @@
 #define CONFIG_VIDEO_SW_CURSOR
 #define CONFIG_SPLASH_SCREEN
 
-/* USB */
+/*
-#ifdef CONFIG_440EPX
+ * USB/EHCI
-#define CONFIG_USB_OHCI
+ */
+#define CONFIG_USB_EHCI			/* Enable EHCI USB support	*/
+#define CONFIG_USB_EHCI_PPC4XX		/* on PPC4xx platform		*/
+#define CONFIG_SYS_PPC4XX_USB_ADDR	0xe0000300
+#define CONFIG_EHCI_DCACHE		/* with dcache handling support	*/
+#define CONFIG_EHCI_MMIO_BIG_ENDIAN
+#define CONFIG_EHCI_DESC_BIG_ENDIAN
+#define CONFIG_EHCI_HCD_INIT_AFTER_RESET /* re-init HCD after CMD_RESET */
 #define CONFIG_USB_STORAGE
 
-/* Comment this out to enable USB 1.1 device */
-#define USB_2_0_DEVICE
-
-#endif /* CONFIG_440EPX */
-
 /* Partitions */
 #define CONFIG_MAC_PARTITION
 #define CONFIG_DOS_PARTITION