1 /* 2 * (C) Copyright 2008 3 * Sergei Poselenov, Emcraft Systems, sposelenov@emcraft.com. 4 * 5 * See file CREDITS for list of people who contributed to this 6 * project. 7 * 8 * This program is free software; you can redistribute it and/or 9 * modify it under the terms of the GNU General Public License as 10 * published by the Free Software Foundation; either version 2 of 11 * the License, or (at your option) any later version. 12 * 13 * This program is distributed in the hope that it will be useful, 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 * GNU General Public License for more details. 17 * 18 * You should have received a copy of the GNU General Public License 19 * along with this program; if not, write to the Free Software 20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, 21 * MA 02111-1307 USA 22 */ 23 24 25 #include <common.h> 26 #include <asm/processor.h> 27 #include <asm/immap_85xx.h> 28 #include <asm/fsl_ddr_sdram.h> 29 #include <asm/processor.h> 30 #include <asm/mmu.h> 31 #include <spd_sdram.h> 32 33 34 #if !defined(CONFIG_SPD_EEPROM) 35 /* 36 * Autodetect onboard DDR SDRAM on 85xx platforms 37 * 38 * NOTE: Some of the hardcoded values are hardware dependant, 39 * so this should be extended for other future boards 40 * using this routine! 41 */ 42 phys_size_t fixed_sdram(void) 43 { 44 volatile ccsr_ddr_t *ddr = (void *)(CONFIG_SYS_MPC8xxx_DDR_ADDR); 45 46 /* 47 * Disable memory controller. 48 */ 49 ddr->cs0_config = 0; 50 ddr->sdram_cfg = 0; 51 52 ddr->cs0_bnds = CONFIG_SYS_DDR_CS0_BNDS; 53 ddr->cs0_config = CONFIG_SYS_DDR_CS0_CONFIG; 54 ddr->timing_cfg_0 = CONFIG_SYS_DDR_TIMING_0; 55 ddr->timing_cfg_1 = CONFIG_SYS_DDR_TIMING_1; 56 ddr->timing_cfg_2 = CONFIG_SYS_DDR_TIMING_2; 57 ddr->sdram_mode = CONFIG_SYS_DDR_MODE; 58 ddr->sdram_interval = CONFIG_SYS_DDR_INTERVAL; 59 ddr->sdram_cfg_2 = CONFIG_SYS_DDR_CONFIG_2; 60 ddr->sdram_clk_cntl = CONFIG_SYS_DDR_CLK_CONTROL; 61 62 asm ("sync;isync;msync"); 63 udelay(1000); 64 65 ddr->sdram_cfg = CONFIG_SYS_DDR_CONFIG; 66 asm ("sync; isync; msync"); 67 udelay(1000); 68 69 if (get_ram_size(0, CONFIG_SYS_SDRAM_SIZE<<20) == CONFIG_SYS_SDRAM_SIZE<<20) { 70 /* 71 * OK, size detected -> all done 72 */ 73 return CONFIG_SYS_SDRAM_SIZE<<20; 74 } 75 76 return 0; /* nothing found ! */ 77 } 78 #endif 79 80 #if defined(CONFIG_SYS_DRAM_TEST) 81 int testdram (void) 82 { 83 uint *pstart = (uint *) CONFIG_SYS_MEMTEST_START; 84 uint *pend = (uint *) CONFIG_SYS_MEMTEST_END; 85 uint *p; 86 87 printf ("SDRAM test phase 1:\n"); 88 for (p = pstart; p < pend; p++) 89 *p = 0xaaaaaaaa; 90 91 for (p = pstart; p < pend; p++) { 92 if (*p != 0xaaaaaaaa) { 93 printf ("SDRAM test fails at: %08x\n", (uint) p); 94 return 1; 95 } 96 } 97 98 printf ("SDRAM test phase 2:\n"); 99 for (p = pstart; p < pend; p++) 100 *p = 0x55555555; 101 102 for (p = pstart; p < pend; p++) { 103 if (*p != 0x55555555) { 104 printf ("SDRAM test fails at: %08x\n", (uint) p); 105 return 1; 106 } 107 } 108 109 printf ("SDRAM test passed.\n"); 110 return 0; 111 } 112 #endif 113