From f3ed3c9b7441cde936d06a1ff7b1490ff0d600e6 Mon Sep 17 00:00:00 2001 From: Stefan Roese Date: Mon, 27 Jul 2009 10:53:43 +0200 Subject: [PATCH] ppc4xx: Fix Arches DDR2 initialization Testing on AMCC Arches with the latest U-Boot version yielded that DDR2 initialization is currently broken. U-Boot hangs upon relocation to SDRAM or crashes with random traps. This patch fixes this problem. Arches now uses a different WRDTR and CLKTR default setting than Canyonlands/Glacier. Signed-off-by: Stefan Roese --- board/amcc/canyonlands/canyonlands.c | 30 +++++++++++++++++----------- 1 file changed, 18 insertions(+), 12 deletions(-) diff --git a/board/amcc/canyonlands/canyonlands.c b/board/amcc/canyonlands/canyonlands.c index cfc1023f4f..c0c135201f 100644 --- a/board/amcc/canyonlands/canyonlands.c +++ b/board/amcc/canyonlands/canyonlands.c @@ -40,6 +40,24 @@ DECLARE_GLOBAL_DATA_PTR; #define BOARD_GLACIER 3 #define BOARD_ARCHES 4 +/* + * Override the default functions in cpu/ppc4xx/44x_spd_ddr2.c with + * board specific values. + */ +#if defined(CONFIG_ARCHES) +u32 ddr_wrdtr(u32 default_val) { + return (SDRAM_WRDTR_LLWP_1_CYC | SDRAM_WRDTR_WTR_0_DEG | 0x823); +} +#else +u32 ddr_wrdtr(u32 default_val) { + return (SDRAM_WRDTR_LLWP_1_CYC | SDRAM_WRDTR_WTR_180_DEG_ADV | 0x823); +} + +u32 ddr_clktr(u32 default_val) { + return (SDRAM_CLKTR_CLKP_90_DEG_ADV); +} +#endif + #if defined(CONFIG_ARCHES) /* * FPGA read/write helper macros @@ -286,18 +304,6 @@ int checkboard(void) } #endif /* !defined(CONFIG_ARCHES) */ -/* - * Override the default functions in cpu/ppc4xx/44x_spd_ddr2.c with - * board specific values. - */ -u32 ddr_wrdtr(u32 default_val) { - return (SDRAM_WRDTR_LLWP_1_CYC | SDRAM_WRDTR_WTR_180_DEG_ADV | 0x823); -} - -u32 ddr_clktr(u32 default_val) { - return (SDRAM_CLKTR_CLKP_90_DEG_ADV); -} - #if defined(CONFIG_NAND_U_BOOT) /* * NAND booting U-Boot version uses a fixed initialization, since the whole -- 2.39.5