/* * (C) Copyright 2005 * Stefan Roese, DENX Software Engineering, sr@denx.de. * * 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> struct sdram_conf_s { unsigned long size; unsigned long reg; #ifdef CONFIG_TQM8548 unsigned long refresh; #endif /* CONFIG_TQM8548 */ }; typedef struct sdram_conf_s sdram_conf_t; #ifdef CONFIG_TQM8548 sdram_conf_t ddr_cs_conf[] = { {(512 << 20), 0x80044102, 0x0001A000}, /* 512MB, 13x10(4) */ {(256 << 20), 0x80040102, 0x00014000}, /* 256MB, 13x10(4) */ {(128 << 20), 0x80040101, 0x0000C000}, /* 128MB, 13x9(4) */ }; #else /* !CONFIG_TQM8548 */ sdram_conf_t ddr_cs_conf[] = { {(512 << 20), 0x80000202}, /* 512MB, 14x10(4) */ {(256 << 20), 0x80000102}, /* 256MB, 13x10(4) */ {(128 << 20), 0x80000101}, /* 128MB, 13x9(4) */ {( 64 << 20), 0x80000001}, /* 64MB, 12x9(4) */ }; #endif /* CONFIG_TQM8548 */ #define N_DDR_CS_CONF (sizeof(ddr_cs_conf) / sizeof(ddr_cs_conf[0])) int cas_latency (void); /* * 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) { int i; volatile ccsr_ddr_t *ddr = (void *)(CFG_MPC85xx_DDR_ADDR); #ifdef CONFIG_TQM8548 volatile ccsr_gur_t *gur = (void *)(CFG_MPC85xx_GUTS_ADDR); #else /* !CONFIG_TQM8548 */ unsigned long cfg_ddr_timing1; unsigned long cfg_ddr_mode; #endif /* CONFIG_TQM8548 */ /* * Disable memory controller. */ ddr->cs0_config = 0; ddr->sdram_cfg = 0; #ifdef CONFIG_TQM8548 ddr->cs0_bnds = (ddr_cs_conf[0].size - 1) >> 24; ddr->cs0_config = ddr_cs_conf[0].reg; ddr->timing_cfg_3 = 0x00010000; /* TIMING CFG 1, 533MHz * PRETOACT: 4 Clocks * ACTTOPRE: 12 Clocks * ACTTORW: 4 Clocks * CASLAT: 4 Clocks * REFREC: 34 Clocks * WRREC: 4 Clocks * ACTTOACT: 3 Clocks * WRTORD: 2 Clocks */ ddr->timing_cfg_1 = 0x4C47A432; /* TIMING CFG 2, 533MHz * ADD_LAT: 3 Clocks * CPO: READLAT + 1 * WR_LAT: 3 Clocks * RD_TO_PRE: 2 Clocks * WR_DATA_DELAY: 1/2 Clock * CKE_PLS: 1 Clock * FOUR_ACT: 13 Clocks */ ddr->timing_cfg_2 = 0x3318484D; /* DDR SDRAM Mode, 533MHz * MRS: Extended Mode Register * OUT: Outputs enabled * RDQS: no * DQS: enabled * OCD: default state * RTT: 75 Ohms * Posted CAS: 3 Clocks * ODS: reduced strength * DLL: enabled * MR: Mode Register * PD: fast exit * WR: 4 Clocks * DLL: no DLL reset * TM: normal * CAS latency: 4 Clocks * BT: sequential * Burst length: 4 */ ddr->sdram_mode = 0x439E0642; /* DDR SDRAM Interval, 533MHz * REFINT: 1040 Clocks * BSTOPRE: 256 */ ddr->sdram_interval = (1040 << 16) | 0x100; /* * workaround for erratum DD10 of MPC8458 family below rev. 2.0: * DDR IO receiver must be set to an acceptable bias point by modifying * a hidden register. */ if (SVR_REV (get_svr ()) < 0x20) { gur->ddrioovcr = 0x90000000; /* enable, VSEL 1.8V */ } /* DDR SDRAM CFG 2 * FRC_SR: normal mode * SR_IE: no self-refresh interrupt * DLL_RST_DIS: don't care, leave at reset value * DQS_CFG: differential DQS signals * ODT_CFG: assert ODT to internal IOs only during reads to DRAM * LVWx_CFG: don't care, leave at reset value * NUM_PR: 1 refresh will be issued at a time * DM_CFG: don't care, leave at reset value * D_INIT: no data initialization */ ddr->sdram_cfg_2 = 0x04401000; /* DDR SDRAM MODE 2 * MRS: Extended Mode Register 2 */ ddr->sdram_mode_2 = 0x8000C000; /* DDR SDRAM CLK CNTL * CLK_ADJUST: 1/2 Clock 0x02000000 * CLK_ADJUST: 5/8 Clock 0x02800000 */ ddr->sdram_clk_cntl = 0x02800000; /* wait for clock stabilization */ asm ("sync;isync;msync"); udelay(1000); /* DDR SDRAM CLK CNTL * MEM_EN: enabled * SREN: don't care, leave at reset value * ECC_EN: no error report * RD_EN: no register DIMMs * SDRAM_TYPE: DDR2 * DYN_PWR: no power management * 32_BE: don't care, leave at reset value * 8_BE: 4 beat burst * NCAP: don't care, leave at reset value * 2T_EN: 1T Timing * BA_INTLV_CTL: no interleaving * x32_EN: x16 organization * PCHB8: MA[10] for auto-precharge * HSE: half strength for single and 2-layer stacks * (full strength for 3- and 4-layer stacks no yet considered) * MEM_HALT: no halt * BI: automatic initialization */ ddr->sdram_cfg = 0x83000008; asm ("sync; isync; msync"); udelay(1000); #else /* !CONFIG_TQM8548 */ switch (casl) { case 20: cfg_ddr_timing1 = 0x47405331 | (3 << 16); cfg_ddr_mode = 0x40020002 | (2 << 4); break; case 25: cfg_ddr_timing1 = 0x47405331 | (4 << 16); cfg_ddr_mode = 0x40020002 | (6 << 4); break; case 30: default: cfg_ddr_timing1 = 0x47405331 | (5 << 16); cfg_ddr_mode = 0x40020002 | (3 << 4); break; } ddr->cs0_bnds = (ddr_cs_conf[0].size - 1) >> 24; ddr->cs0_config = ddr_cs_conf[0].reg; ddr->timing_cfg_1 = cfg_ddr_timing1; ddr->timing_cfg_2 = 0x00000800; /* P9-45,may need tuning */ ddr->sdram_mode = cfg_ddr_mode; ddr->sdram_interval = 0x05160100; /* autocharge,no open page */ ddr->err_disable = 0x0000000D; asm ("sync; isync; msync"); udelay (1000); ddr->sdram_cfg = 0xc2000000; /* unbuffered,no DYN_PWR */ asm ("sync; isync; msync"); udelay (1000); #endif /* CONFIG_TQM8548 */ for (i = 0; i < N_DDR_CS_CONF; i++) { ddr->cs0_config = ddr_cs_conf[i].reg; if (get_ram_size (0, ddr_cs_conf[i].size) == ddr_cs_conf[i].size) { /* * size detected -> set Chip Select Bounds Register */ ddr->cs0_bnds = (ddr_cs_conf[i].size - 1) >> 24; break; } } #ifdef CONFIG_TQM8548 if (i < N_DDR_CS_CONF) { /* Adjust refresh rate for DDR2 */ ddr->timing_cfg_3 = ddr_cs_conf[i].refresh & 0x00070000; ddr->timing_cfg_1 = (ddr->timing_cfg_1 & 0xFFFF0FFF) | (ddr_cs_conf[i].refresh & 0x0000F000); return ddr_cs_conf[i].size; } #endif /* CONFIG_TQM8548 */ /* return size if detected, else return 0 */ return (i < N_DDR_CS_CONF) ? ddr_cs_conf[i].size : 0; } void board_add_ram_info (int use_default) { int casl; if (use_default) casl = CONFIG_DDR_DEFAULT_CL; else casl = cas_latency (); puts (" (CL="); switch (casl) { case 20: puts ("2)"); break; case 25: puts ("2.5)"); break; case 30: puts ("3)"); break; } } phys_size_t initdram (int board_type) { long dram_size = 0; int casl; #if defined(CONFIG_DDR_DLL) /* * This DLL-Override only used on TQM8540 and TQM8560 */ { volatile ccsr_gur_t *gur = (void *)(CFG_MPC85xx_GUTS_ADDR); int i, x; x = 10; /* * Work around to stabilize DDR DLL */ gur->ddrdllcr = 0x81000000; asm ("sync; isync; msync"); udelay (200); while (gur->ddrdllcr != 0x81000100) { gur->devdisr = gur->devdisr | 0x00010000; asm ("sync; isync; msync"); for (i = 0; i < x; i++) ; gur->devdisr = gur->devdisr & 0xfff7ffff; asm ("sync; isync; msync"); x++; } } #endif casl = cas_latency (); dram_size = sdram_setup (casl); if ((dram_size == 0) && (casl != CONFIG_DDR_DEFAULT_CL)) { /* * Try again with default CAS latency */ puts ("Problem with CAS lantency"); board_add_ram_info (1); puts (", using default CL!\n"); casl = CONFIG_DDR_DEFAULT_CL; dram_size = sdram_setup (casl); puts (" "); } 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