/* * (C) Copyright 2000-2004 * Wolfgang Denk, DENX Software Engineering, wd@denx.de. * * Modified by, Yuli Barcohen, Arabella Software Ltd., yuli@arabellasw.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 <config.h> #include <common.h> #include <mpc8xx.h> #include "pld.h" #include "hpi.h" #define _NOT_USED_ 0xFFFFFFFF static long int dram_size (long int, long int *, long int); const uint sdram_table[] = { /* * Single Read. (Offset 0 in UPMB RAM) */ 0x1F07FC04, 0xEEAEFC04, 0x11ADFC04, 0xEFBBBC00, 0x1FF77C47, /* last */ /* * SDRAM Initialization (offset 5 in UPMB RAM) * * This is no UPM entry point. The following definition uses * the remaining space to establish an initialization * sequence, which is executed by a RUN command. * */ 0x1FF77C34, 0xEFEABC34, 0x1FB57C35, /* last */ /* * Burst Read. (Offset 8 in UPMB RAM) */ 0x1F07FC04, 0xEEAEFC04, 0x10ADFC04, 0xF0AFFC00, 0xF0AFFC00, 0xF1AFFC00, 0xEFBBBC00, 0x1FF77C47, /* last */ _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_, /* * Single Write. (Offset 18 in UPMB RAM) */ 0x1F07FC04, 0xEEAEBC00, 0x01B93C04, 0x1FF77C47, /* last */ _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_, /* * Burst Write. (Offset 20 in UPMB RAM) */ 0x1F07FC04, 0xEEAEBC00, 0x10AD7C00, 0xF0AFFC00, 0xF0AFFC00, 0xE1BBBC04, 0x1FF77C47, /* last */ _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_, /* * Refresh (Offset 30 in UPMB RAM) */ 0x1FF5FC84, 0xFFFFFC04, 0xFFFFFC04, 0xFFFFFC04, 0xFFFFFC84, 0xFFFFFC07, /* last */ _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_, /* * Exception. (Offset 3c in UPMB RAM) */ 0x7FFFFC07, /* last */ _NOT_USED_, _NOT_USED_, _NOT_USED_, }; long int initdram (int board_type) { volatile immap_t *immr = (immap_t *) CFG_IMMR; volatile memctl8xx_t *memctl = &immr->im_memctl; /* volatile spc1920_pld_t *pld = (spc1920_pld_t *) CFG_SPC1920_PLD_BASE; */ long int size_b0; long int size8, size9; int i; /* * Configure UPMB for SDRAM */ upmconfig (UPMB, (uint *)sdram_table, sizeof(sdram_table)/sizeof(uint)); udelay(100); memctl->memc_mptpr = CFG_MPTPR; /* burst length=4, burst type=sequential, CAS latency=2 */ memctl->memc_mar = CFG_MAR; /* * Map controller bank 1 to the SDRAM bank at preliminary address. */ memctl->memc_or1 = CFG_OR1_PRELIM; memctl->memc_br1 = CFG_BR1_PRELIM; /* initialize memory address register */ memctl->memc_mbmr = CFG_MBMR_8COL; /* refresh not enabled yet */ /* mode initialization (offset 5) */ udelay (200); /* 0x80006105 */ memctl->memc_mcr = MCR_OP_RUN | MCR_UPM_B | MCR_MB_CS1 | MCR_MLCF (1) | MCR_MAD (0x05); /* run 2 refresh sequence with 4-beat refresh burst (offset 0x30) */ udelay (1); /* 0x80006130 */ memctl->memc_mcr = MCR_OP_RUN | MCR_UPM_B | MCR_MB_CS1 | MCR_MLCF (1) | MCR_MAD (0x30); udelay (1); /* 0x80006130 */ memctl->memc_mcr = MCR_OP_RUN | MCR_UPM_B | MCR_MB_CS1 | MCR_MLCF (1) | MCR_MAD (0x30); udelay (1); /* 0x80006106 */ memctl->memc_mcr = MCR_OP_RUN | MCR_UPM_B | MCR_MB_CS1 | MCR_MLCF (1) | MCR_MAD (0x06); memctl->memc_mbmr |= MBMR_PTBE; /* refresh enabled */ udelay (200); /* Need at least 10 DRAM accesses to stabilize */ for (i = 0; i < 10; ++i) { volatile unsigned long *addr = (volatile unsigned long *) CFG_SDRAM_BASE; unsigned long val; val = *(addr + i); *(addr + i) = val; } /* * Check Bank 0 Memory Size for re-configuration * * try 8 column mode */ size8 = dram_size (CFG_MBMR_8COL, (long *)CFG_SDRAM_BASE, SDRAM_MAX_SIZE); udelay (1000); /* * try 9 column mode */ size9 = dram_size (CFG_MBMR_9COL, (long *)CFG_SDRAM_BASE, SDRAM_MAX_SIZE); if (size8 < size9) { /* leave configuration at 9 columns */ size_b0 = size9; memctl->memc_mbmr = CFG_MBMR_9COL | MBMR_PTBE; udelay (500); } else { /* back to 8 columns */ size_b0 = size8; memctl->memc_mbmr = CFG_MBMR_8COL | MBMR_PTBE; udelay (500); } /* * Final mapping: */ memctl->memc_or1 = ((-size_b0) & 0xFFFF0000) | OR_CSNT_SAM | OR_G5LS | SDRAM_TIMING; memctl->memc_br1 = (CFG_SDRAM_BASE & BR_BA_MSK) | BR_MS_UPMB | BR_V; udelay (1000); /* initalize the DSP Host Port Interface */ hpi_init(); /* FRAM Setup */ memctl->memc_or4 = CFG_OR4; memctl->memc_br4 = CFG_BR4; udelay(1000); return (size_b0); } /* * Check memory range for valid RAM. A simple memory test determines * the actually available RAM size between addresses `base' and * `base + maxsize'. Some (not all) hardware errors are detected: * - short between address lines * - short between data lines */ static long int dram_size (long int mbmr_value, long int *base, long int maxsize) { volatile immap_t *immap = (immap_t *) CFG_IMMR; volatile memctl8xx_t *memctl = &immap->im_memctl; memctl->memc_mbmr = mbmr_value; return (get_ram_size (base, maxsize)); } /************* other stuff ******************/ int board_early_init_f(void) { volatile immap_t *immap = (immap_t *) CFG_IMMR; /* Set Go/NoGo led (PA15) to color red */ immap->im_ioport.iop_papar &= ~0x1; immap->im_ioport.iop_paodr &= ~0x1; immap->im_ioport.iop_padir |= 0x1; immap->im_ioport.iop_padat |= 0x1; #if 0 /* Turn on LED PD9 */ immap->im_ioport.iop_pdpar &= ~(0x0040); immap->im_ioport.iop_pddir |= 0x0040; immap->im_ioport.iop_pddat |= 0x0040; #endif /* * Enable console on SMC1. This requires turning on * the com2_en signal and SMC1_DISABLE */ /* SMC1_DISABLE: PB17 */ immap->im_cpm.cp_pbodr &= ~0x4000; immap->im_cpm.cp_pbpar &= ~0x4000; immap->im_cpm.cp_pbdir |= 0x4000; immap->im_cpm.cp_pbdat &= ~0x4000; /* COM2_EN: PD10 */ immap->im_ioport.iop_pdpar &= ~0x0020; immap->im_ioport.iop_pddir &= ~0x4000; immap->im_ioport.iop_pddir |= 0x0020; immap->im_ioport.iop_pddat |= 0x0020; #ifdef CFG_SMC1_PLD_CLK4 /* SMC1 uses CLK4 from PLD */ immap->im_cpm.cp_simode |= 0x7000; immap->im_cpm.cp_simode &= ~(0x8000); #endif return 0; } int last_stage_init(void) { #ifdef CONFIG_SPC1920_HPI_TEST printf("CMB1920 Host Port Interface Test: %s\n", hpi_test() ? "Failed!" : "OK"); #endif return 0; } int checkboard (void) { puts("Board: SPC1920\n"); return 0; }