1 /* 2 * (C) Copyright 2008 3 * Sergei Poselenov, Emcraft Systems, sposelenov@emcraft.com. 4 * 5 * SPDX-License-Identifier: GPL-2.0+ 6 */ 7 8 #include <common.h> 9 #include <asm/processor.h> 10 #include <asm/immap_85xx.h> 11 #include <asm/fsl_ddr_sdram.h> 12 #include <asm/processor.h> 13 #include <asm/mmu.h> 14 #include <spd_sdram.h> 15 16 17 #if !defined(CONFIG_SPD_EEPROM) 18 /* 19 * Autodetect onboard DDR SDRAM on 85xx platforms 20 * 21 * NOTE: Some of the hardcoded values are hardware dependant, 22 * so this should be extended for other future boards 23 * using this routine! 24 */ 25 phys_size_t fixed_sdram(void) 26 { 27 volatile ccsr_ddr_t *ddr = (void *)(CONFIG_SYS_MPC8xxx_DDR_ADDR); 28 29 /* 30 * Disable memory controller. 31 */ 32 ddr->cs0_config = 0; 33 ddr->sdram_cfg = 0; 34 35 ddr->cs0_bnds = CONFIG_SYS_DDR_CS0_BNDS; 36 ddr->cs0_config = CONFIG_SYS_DDR_CS0_CONFIG; 37 ddr->timing_cfg_0 = CONFIG_SYS_DDR_TIMING_0; 38 ddr->timing_cfg_1 = CONFIG_SYS_DDR_TIMING_1; 39 ddr->timing_cfg_2 = CONFIG_SYS_DDR_TIMING_2; 40 ddr->sdram_mode = CONFIG_SYS_DDR_MODE; 41 ddr->sdram_interval = CONFIG_SYS_DDR_INTERVAL; 42 ddr->sdram_cfg_2 = CONFIG_SYS_DDR_CONFIG_2; 43 ddr->sdram_clk_cntl = CONFIG_SYS_DDR_CLK_CONTROL; 44 45 asm ("sync;isync;msync"); 46 udelay(1000); 47 48 ddr->sdram_cfg = CONFIG_SYS_DDR_CONFIG; 49 asm ("sync; isync; msync"); 50 udelay(1000); 51 52 if (get_ram_size(0, CONFIG_SYS_SDRAM_SIZE<<20) == CONFIG_SYS_SDRAM_SIZE<<20) { 53 /* 54 * OK, size detected -> all done 55 */ 56 return CONFIG_SYS_SDRAM_SIZE<<20; 57 } 58 59 return 0; /* nothing found ! */ 60 } 61 #endif 62 63 #if defined(CONFIG_SYS_DRAM_TEST) 64 int testdram (void) 65 { 66 uint *pstart = (uint *) CONFIG_SYS_MEMTEST_START; 67 uint *pend = (uint *) CONFIG_SYS_MEMTEST_END; 68 uint *p; 69 70 printf ("SDRAM test phase 1:\n"); 71 for (p = pstart; p < pend; p++) 72 *p = 0xaaaaaaaa; 73 74 for (p = pstart; p < pend; p++) { 75 if (*p != 0xaaaaaaaa) { 76 printf ("SDRAM test fails at: %08x\n", (uint) p); 77 return 1; 78 } 79 } 80 81 printf ("SDRAM test phase 2:\n"); 82 for (p = pstart; p < pend; p++) 83 *p = 0x55555555; 84 85 for (p = pstart; p < pend; p++) { 86 if (*p != 0x55555555) { 87 printf ("SDRAM test fails at: %08x\n", (uint) p); 88 return 1; 89 } 90 } 91 92 printf ("SDRAM test passed.\n"); 93 return 0; 94 } 95 #endif 96