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author | Dirk Eibach <dirk.eibach@gdsys.cc> | 2014-11-13 19:21:18 +0100 |
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committer | Stefan Roese <sr@denx.de> | 2014-11-19 08:48:42 +0100 |
commit | 50dcf89d90b3597d86f5d26f131eabc98bbd5209 (patch) | |
tree | 1625ea82bec2e9c51924f9dd3b761dff7b352b4b /board/gdsys/mpc8308/sdram.c | |
parent | a8cb9d0b17af9d7b3ad205cf83fbfd47528fa9d0 (diff) | |
download | blackbird-obmc-uboot-50dcf89d90b3597d86f5d26f131eabc98bbd5209.tar.gz blackbird-obmc-uboot-50dcf89d90b3597d86f5d26f131eabc98bbd5209.zip |
mpc83xx: Add gdsys hrcon board
The gdsys hrcon board is based on a Freescale MPC8308 SOC.
It boots from NOR-Flash, kernel and rootfs are stored on
SD-Card.
On board peripherals include:
- 1x GbE (optional)
- Lattice ECP3 FPGA connected via eLBC and PCIe
Signed-off-by: Dirk Eibach <dirk.eibach@gdsys.cc>
Signed-off-by: Stefan Roese <sr@denx.de>
Diffstat (limited to 'board/gdsys/mpc8308/sdram.c')
-rw-r--r-- | board/gdsys/mpc8308/sdram.c | 82 |
1 files changed, 82 insertions, 0 deletions
diff --git a/board/gdsys/mpc8308/sdram.c b/board/gdsys/mpc8308/sdram.c new file mode 100644 index 0000000000..0fce8cfbab --- /dev/null +++ b/board/gdsys/mpc8308/sdram.c @@ -0,0 +1,82 @@ +/* + * Copyright (C) 2007 Freescale Semiconductor, Inc. + * Copyright (C) 2010 Ilya Yanok, Emcraft Systems, yanok@emcraft.com + * + * Authors: Nick.Spence@freescale.com + * Wilson.Lo@freescale.com + * scottwood@freescale.com + * + * This files is mostly identical to the original from + * board\freescale\mpc8315erdb\sdram.c + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include <common.h> +#include <mpc83xx.h> +#include <spd_sdram.h> + +#include <asm/bitops.h> +#include <asm/io.h> + +#include <asm/processor.h> + +DECLARE_GLOBAL_DATA_PTR; + +/* Fixed sdram init -- doesn't use serial presence detect. + * + * This is useful for faster booting in configs where the RAM is unlikely + * to be changed, or for things like NAND booting where space is tight. + */ +static long fixed_sdram(void) +{ + immap_t *im = (immap_t *)CONFIG_SYS_IMMR; + u32 msize = CONFIG_SYS_DDR_SIZE * 1024 * 1024; + u32 msize_log2 = __ilog2(msize); + + out_be32(&im->sysconf.ddrlaw[0].bar, + CONFIG_SYS_DDR_SDRAM_BASE & 0xfffff000); + out_be32(&im->sysconf.ddrlaw[0].ar, LBLAWAR_EN | (msize_log2 - 1)); + out_be32(&im->sysconf.ddrcdr, CONFIG_SYS_DDRCDR_VALUE); + + out_be32(&im->ddr.csbnds[0].csbnds, (msize - 1) >> 24); + out_be32(&im->ddr.cs_config[0], CONFIG_SYS_DDR_CS0_CONFIG); + + /* Currently we use only one CS, so disable the other bank. */ + out_be32(&im->ddr.cs_config[1], 0); + + out_be32(&im->ddr.sdram_clk_cntl, CONFIG_SYS_DDR_SDRAM_CLK_CNTL); + out_be32(&im->ddr.timing_cfg_3, CONFIG_SYS_DDR_TIMING_3); + out_be32(&im->ddr.timing_cfg_1, CONFIG_SYS_DDR_TIMING_1); + out_be32(&im->ddr.timing_cfg_2, CONFIG_SYS_DDR_TIMING_2); + out_be32(&im->ddr.timing_cfg_0, CONFIG_SYS_DDR_TIMING_0); + + out_be32(&im->ddr.sdram_cfg, CONFIG_SYS_DDR_SDRAM_CFG); + out_be32(&im->ddr.sdram_cfg2, CONFIG_SYS_DDR_SDRAM_CFG2); + out_be32(&im->ddr.sdram_mode, CONFIG_SYS_DDR_MODE); + out_be32(&im->ddr.sdram_mode2, CONFIG_SYS_DDR_MODE2); + + out_be32(&im->ddr.sdram_interval, CONFIG_SYS_DDR_INTERVAL); + sync(); + + /* enable DDR controller */ + setbits_be32(&im->ddr.sdram_cfg, SDRAM_CFG_MEM_EN); + sync(); + + return get_ram_size(CONFIG_SYS_DDR_SDRAM_BASE, msize); +} + +phys_size_t initdram(int board_type) +{ + immap_t *im = (immap_t *)CONFIG_SYS_IMMR; + u32 msize; + + if ((in_be32(&im->sysconf.immrbar) & IMMRBAR_BASE_ADDR) != (u32)im) + return -1; + + /* DDR SDRAM */ + msize = fixed_sdram(); + + /* return total bus SDRAM size(bytes) -- DDR */ + return msize; +} |