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author | Sergei Poselenov <sposelenov@emcraft.com> | 2008-04-30 13:42:50 +0400 |
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committer | Wolfgang Denk <wd@denx.de> | 2008-05-21 01:27:46 +0400 |
commit | 5d108ac8f435924c624cd6aaacd44f35f5cf94c0 (patch) | |
tree | 79e5040c9525024b2724e772a10fd7fdf5938a7a /board/socrates/sdram.c | |
parent | 727f63334676e760877d43bfb8f0e9331ac8b101 (diff) | |
download | u-boot-5d108ac8f435924c624cd6aaacd44f35f5cf94c0.tar.xz |
Initial support for "Socrates" board
Signed-off-by: Sergei Poselenov <sposelenov@emcraft.com>
Diffstat (limited to 'board/socrates/sdram.c')
-rw-r--r-- | board/socrates/sdram.c | 122 |
1 files changed, 122 insertions, 0 deletions
diff --git a/board/socrates/sdram.c b/board/socrates/sdram.c new file mode 100644 index 0000000000..329eaccd5d --- /dev/null +++ b/board/socrates/sdram.c @@ -0,0 +1,122 @@ +/* + * (C) Copyright 2008 + * Sergei Poselenov, Emcraft Systems, sposelenov@emcraft.com. + * + * See file CREDITS for list of people who contributed to this + * project. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of + * the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, + * MA 02111-1307 USA + */ + + +#include <common.h> +#include <asm/processor.h> +#include <asm/immap_85xx.h> +#include <asm/processor.h> +#include <asm/mmu.h> +#include <spd_sdram.h> + + +#if !defined(CONFIG_SPD_EEPROM) +/* + * Autodetect onboard DDR SDRAM on 85xx platforms + * + * NOTE: Some of the hardcoded values are hardware dependant, + * so this should be extended for other future boards + * using this routine! + */ +long int sdram_setup(int casl) +{ + volatile ccsr_ddr_t *ddr = (void *)(CFG_MPC85xx_DDR_ADDR); + + /* + * Disable memory controller. + */ + ddr->cs0_config = 0; + ddr->sdram_cfg = 0; + + ddr->cs0_bnds = CFG_DDR_CS0_BNDS; + ddr->cs0_config = CFG_DDR_CS0_CONFIG; + ddr->timing_cfg_0 = CFG_DDR_TIMING_0; + ddr->timing_cfg_1 = CFG_DDR_TIMING_1; + ddr->timing_cfg_2 = CFG_DDR_TIMING_2; + ddr->sdram_mode = CFG_DDR_MODE; + ddr->sdram_interval = CFG_DDR_INTERVAL; + ddr->sdram_cfg_2 = CFG_DDR_CONFIG_2; + ddr->sdram_clk_cntl = CFG_DDR_CLK_CONTROL; + + asm ("sync;isync;msync"); + udelay(1000); + + ddr->sdram_cfg = CFG_DDR_CONFIG; + asm ("sync; isync; msync"); + udelay(1000); + + if (get_ram_size(0, CFG_SDRAM_SIZE<<20) == CFG_SDRAM_SIZE<<20) { + /* + * OK, size detected -> all done + */ + return CFG_SDRAM_SIZE<<20; + } + + return 0; /* nothing found ! */ +} +#endif + +long int initdram (int board_type) +{ + long dram_size = 0; +#if defined(CONFIG_SPD_EEPROM) + dram_size = spd_sdram (); +#else + dram_size = sdram_setup(CONFIG_DDR_DEFAULT_CL); +#endif + return dram_size; +} + +#if defined(CFG_DRAM_TEST) +int testdram (void) +{ + uint *pstart = (uint *) CFG_MEMTEST_START; + uint *pend = (uint *) CFG_MEMTEST_END; + uint *p; + + printf ("SDRAM test phase 1:\n"); + for (p = pstart; p < pend; p++) + *p = 0xaaaaaaaa; + + for (p = pstart; p < pend; p++) { + if (*p != 0xaaaaaaaa) { + printf ("SDRAM test fails at: %08x\n", (uint) p); + return 1; + } + } + + printf ("SDRAM test phase 2:\n"); + for (p = pstart; p < pend; p++) + *p = 0x55555555; + + for (p = pstart; p < pend; p++) { + if (*p != 0x55555555) { + printf ("SDRAM test fails at: %08x\n", (uint) p); + return 1; + } + } + + printf ("SDRAM test passed.\n"); + return 0; +} +#endif |