/* * (C) Copyright 2000 * Wolfgang Denk, DENX Software Engineering, wd@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 <mpc8xx.h> #include "fpga.h" /* ------------------------------------------------------------------------- */ static long int dram_size (long int, long int *, long int); unsigned long flash_init (void); /* ------------------------------------------------------------------------- */ #define _NOT_USED_ 0xFFFFCC25 const uint sdram_table[] = { /* * Single Read. (Offset 00h in UPMA RAM) */ 0x0F03CC04, 0x00ACCC24, 0x1FF74C20, _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_, /* * Burst Read. (Offset 08h in UPMA RAM) */ 0x0F03CC04, 0x00ACCC24, 0x00FFCC20, 0x00FFCC20, 0x01FFCC20, 0x1FF74C20, _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_, /* * Single Write. (Offset 18h in UPMA RAM) */ 0x0F03CC02, 0x00AC0C24, 0x1FF74C25, _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_, /* * Burst Write. (Offset 20h in UPMA RAM) */ 0x0F03CC00, 0x00AC0C20, 0x00FFFC20, 0x00FFFC22, 0x01FFFC24, 0x1FF74C25, _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_, /* * Refresh. (Offset 30h in UPMA RAM) * (Initialization code at 0x36) */ 0x0FF0CC24, 0xFFFFCC24, _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_, 0xEFFB8C34, 0x0FF74C34, 0x0FFACCB4, 0x0FF5CC34, 0x0FFCC34, 0x0FFFCCB4, /* * Exception. (Offset 3Ch in UPMA RAM) */ 0x0FEA8C34, 0x1FB54C34, 0xFFFFCC34, _NOT_USED_ }; /* ------------------------------------------------------------------------- */ /* * Check Board Identity: */ int checkboard (void) { char *s = getenv ("serial#"); puts ("Board QUANTUM, Serial No: "); for (; s && *s; ++s) { if (*s == ' ') break; putc (*s); } putc ('\n'); return (0); /* success */ } /* ------------------------------------------------------------------------- */ long int initdram (int board_type) { volatile immap_t *immap = (immap_t *) CFG_IMMR; volatile memctl8xx_t *memctl = &immap->im_memctl; long int size9; upmconfig (UPMA, (uint *) sdram_table, sizeof (sdram_table) / sizeof (uint)); /* Refresh clock prescalar */ memctl->memc_mptpr = CFG_MPTPR; memctl->memc_mar = 0x00000088; /* Map controller banks 1 to the SDRAM bank */ memctl->memc_or1 = CFG_OR1_PRELIM; memctl->memc_br1 = CFG_BR1_PRELIM; memctl->memc_mamr = CFG_MAMR_9COL & (~(MAMR_PTAE)); /* no refresh yet */ udelay (200); /* perform SDRAM initializsation sequence */ memctl->memc_mcr = 0x80002136; /* SDRAM bank 0 */ udelay (1); memctl->memc_mamr |= MAMR_PTAE; /* enable refresh */ udelay (1000); /* Check Bank 0 Memory Size, * 9 column mode */ size9 = dram_size (CFG_MAMR_9COL, (long *) SDRAM_BASE_PRELIM, SDRAM_MAX_SIZE); /* * Final mapping: */ memctl->memc_or1 = ((-size9) & 0xFFFF0000) | CFG_OR_TIMING_SDRAM; udelay (1000); return (size9); } /* ------------------------------------------------------------------------- */ /* * 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 mamr_value, long int *base, long int maxsize) { volatile immap_t *immap = (immap_t *) CFG_IMMR; volatile memctl8xx_t *memctl = &immap->im_memctl; volatile ulong *addr; ulong cnt, val, size; ulong save[32]; /* to make test non-destructive */ unsigned char i = 0; memctl->memc_mamr = mamr_value; for (cnt = maxsize / sizeof (long); cnt > 0; cnt >>= 1) { addr = (volatile ulong *)(base + cnt); /* pointer arith! */ save[i++] = *addr; *addr = ~cnt; } /* write 0 to base address */ addr = (volatile ulong *)base; save[i] = *addr; *addr = 0; /* check at base address */ if ((val = *addr) != 0) { /* Restore the original data before leaving the function. */ *addr = save[i]; for (cnt = 1; cnt <= maxsize / sizeof (long); cnt <<= 1) { addr = (volatile ulong *) base + cnt; *addr = save[--i]; } return (0); } for (cnt = 1; cnt <= maxsize / sizeof (long); cnt <<= 1) { addr = (volatile ulong *)(base + cnt); /* pointer arith! */ val = *addr; *addr = save[--i]; if (val != (~cnt)) { size = cnt * sizeof (long); /* Restore the original data before returning */ for (cnt <<= 1; cnt <= maxsize / sizeof (long); cnt <<= 1) { addr = (volatile ulong *) base + cnt; *addr = save[--i]; } return (size); } } return (maxsize); } /* * Miscellaneous intialization */ int misc_init_r (void) { char *fpga_data_str = getenv ("fpgadata"); char *fpga_size_str = getenv ("fpgasize"); void *fpga_data; int fpga_size; int status; volatile immap_t *immap = (immap_t *) CFG_IMMR; volatile memctl8xx_t *memctl = &immap->im_memctl; int flash_size; /* Remap FLASH according to real size */ flash_size = flash_init (); memctl->memc_or0 = CFG_OR_TIMING_FLASH | (-flash_size & 0xFFFF8000); memctl->memc_br0 = (CFG_FLASH_BASE & BR_BA_MSK) | BR_MS_GPCM | BR_V; if (fpga_data_str && fpga_size_str) { fpga_data = (void *) simple_strtoul (fpga_data_str, NULL, 16); fpga_size = simple_strtoul (fpga_size_str, NULL, 10); status = fpga_boot (fpga_data, fpga_size); if (status != 0) { printf ("\nFPGA: Booting failed "); switch (status) { case ERROR_FPGA_PRG_INIT_LOW: printf ("(Timeout: INIT not low after asserting PROGRAM*)\n "); break; case ERROR_FPGA_PRG_INIT_HIGH: printf ("(Timeout: INIT not high after deasserting PROGRAM*)\n "); break; case ERROR_FPGA_PRG_DONE: printf ("(Timeout: DONE not high after programming FPGA)\n "); break; } } } return 0; }