/* * Copyright Freescale Semiconductor, Inc. * * 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 * * Change log: * 20050101: Eran Liberty (liberty@freescale.com) * Initial file creating (porting from 85XX & 8260) */ #include #include #include #include #include #include #include #if defined(CONFIG_PCI) #include #endif #if defined(CONFIG_SPD_EEPROM) #include #endif int fixed_sdram(void); void sdram_init(void); int board_early_init_f (void) { volatile u8* bcsr = (volatile u8*)CFG_BCSR; /* Enable flash write */ bcsr[1] &= ~0x01; return 0; } #define ns2clk(ns) (ns / (1000000000 / CONFIG_8349_CLKIN) + 1) long int initdram (int board_type) { volatile immap_t *im = (immap_t *)CFG_IMMRBAR; u32 msize = 0; if ((im->sysconf.immrbar & IMMRBAR_BASE_ADDR) != (u32)im) return -1; /* DDR SDRAM - Main SODIMM */ im->sysconf.ddrlaw[0].bar = CFG_DDR_BASE & LAWBAR_BAR; #if defined(CONFIG_SPD_EEPROM) msize = spd_sdram(); #else msize = fixed_sdram(); #endif /* * Initialize SDRAM if it is on local bus. */ sdram_init(); puts(" DDR RAM: "); /* return total bus SDRAM size(bytes) -- DDR */ return (msize * 1024 * 1024); } #if !defined(CONFIG_SPD_EEPROM) /************************************************************************* * fixed sdram init -- doesn't use serial presence detect. ************************************************************************/ int fixed_sdram(void) { volatile immap_t *im = (immap_t *)CFG_IMMRBAR; u32 msize = 0; u32 ddr_size; u32 ddr_size_log2; msize = CFG_DDR_SIZE; for (ddr_size = msize << 20, ddr_size_log2 = 0; (ddr_size > 1); ddr_size = ddr_size>>1, ddr_size_log2++) { if (ddr_size & 1) { return -1; } } im->sysconf.ddrlaw[0].ar = LAWAR_EN | ((ddr_size_log2 - 1) & LAWAR_SIZE); #if (CFG_DDR_SIZE != 256) #warning Currenly any ddr size other than 256 is not supported #endif im->ddr.csbnds[0].csbnds = 0x00100017; im->ddr.csbnds[1].csbnds = 0x0018001f; im->ddr.csbnds[2].csbnds = 0x00000007; im->ddr.csbnds[3].csbnds = 0x0008000f; im->ddr.cs_config[0] = CFG_DDR_CONFIG; im->ddr.cs_config[1] = CFG_DDR_CONFIG; im->ddr.cs_config[2] = CFG_DDR_CONFIG; im->ddr.cs_config[3] = CFG_DDR_CONFIG; im->ddr.timing_cfg_1 = 3 << TIMING_CFG1_PRETOACT_SHIFT | 7 << TIMING_CFG1_ACTTOPRE_SHIFT | 3 << TIMING_CFG1_ACTTORW_SHIFT | 4 << TIMING_CFG1_CASLAT_SHIFT | 3 << TIMING_CFG1_REFREC_SHIFT | 3 << TIMING_CFG1_WRREC_SHIFT | 2 << TIMING_CFG1_ACTTOACT_SHIFT | 1 << TIMING_CFG1_WRTORD_SHIFT; im->ddr.timing_cfg_2 = 2 << TIMING_CFG2_WR_DATA_DELAY_SHIFT; im->ddr.sdram_cfg = SDRAM_CFG_SREN #if defined(CONFIG_DDR_2T_TIMING) | SDRAM_CFG_2T_EN #endif | 2 << SDRAM_CFG_SDRAM_TYPE_SHIFT; im->ddr.sdram_mode = 0x2000 << SDRAM_MODE_ESD_SHIFT | 0x0162 << SDRAM_MODE_SD_SHIFT; im->ddr.sdram_interval = 0x045B << SDRAM_INTERVAL_REFINT_SHIFT | 0x0100 << SDRAM_INTERVAL_BSTOPRE_SHIFT; udelay(200); im->ddr.sdram_cfg |= SDRAM_CFG_MEM_EN; return msize; } #endif/*!CFG_SPD_EEPROM*/ int checkboard (void) { puts("Board: Freescale MPC8349ADS\n"); return 0; } /* * if MPC8349ADS is soldered with SDRAM */ #if defined(CFG_BR2_PRELIM) \ && defined(CFG_OR2_PRELIM) \ && defined(CFG_LBLAWBAR2_PRELIM) \ && defined(CFG_LBLAWAR2_PRELIM) /* * Initialize SDRAM memory on the Local Bus. */ void sdram_init(void) { volatile immap_t *immap = (immap_t *)CFG_IMMRBAR; volatile lbus8349_t *lbc= &immap->lbus; uint *sdram_addr = (uint *)CFG_LBC_SDRAM_BASE; puts("\n SDRAM on Local Bus: "); print_size (CFG_LBC_SDRAM_SIZE * 1024 * 1024, "\n"); /* * Setup SDRAM Base and Option Registers, already done in cpu_init.c */ /*setup mtrpt, lsrt and lbcr for LB bus*/ lbc->lbcr = CFG_LBC_LBCR; lbc->mrtpr = CFG_LBC_MRTPR; lbc->lsrt = CFG_LBC_LSRT; asm("sync"); /* * Configure the SDRAM controller Machine Mode Register. */ lbc->lsdmr = CFG_LBC_LSDMR_5; /* 0x40636733; normal operation*/ lbc->lsdmr = CFG_LBC_LSDMR_1; /*0x68636733;precharge all the banks*/ asm("sync"); *sdram_addr = 0xff; udelay(100); lbc->lsdmr = CFG_LBC_LSDMR_2;/*0x48636733;auto refresh*/ asm("sync"); /*1 times*/ *sdram_addr = 0xff; udelay(100); /*2 times*/ *sdram_addr = 0xff; udelay(100); /*3 times*/ *sdram_addr = 0xff; udelay(100); /*4 times*/ *sdram_addr = 0xff; udelay(100); /*5 times*/ *sdram_addr = 0xff; udelay(100); /*6 times*/ *sdram_addr = 0xff; udelay(100); /*7 times*/ *sdram_addr = 0xff; udelay(100); /*8 times*/ *sdram_addr = 0xff; udelay(100); /* 0x58636733;mode register write operation */ lbc->lsdmr = CFG_LBC_LSDMR_4; asm("sync"); *sdram_addr = 0xff; udelay(100); lbc->lsdmr = CFG_LBC_LSDMR_5; /*0x40636733;normal operation*/ asm("sync"); *sdram_addr = 0xff; udelay(100); } #else void sdram_init(void) { put("SDRAM on Local Bus is NOT available!\n"); } #endif