diff options
Diffstat (limited to 'board/RPXlite_dw/RPXlite_dw.c')
| -rw-r--r-- | board/RPXlite_dw/RPXlite_dw.c | 180 |
1 files changed, 180 insertions, 0 deletions
diff --git a/board/RPXlite_dw/RPXlite_dw.c b/board/RPXlite_dw/RPXlite_dw.c new file mode 100644 index 0000000..86cf6c1 --- /dev/null +++ b/board/RPXlite_dw/RPXlite_dw.c @@ -0,0 +1,180 @@ +/* + * (C) Copyright 2004 + * Sam Song, IEMC. SHU, samsongshu@yahoo.com.cn + * + * 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 + */ + +/* + * Sam Song + * U-Boot port on RPXlite DW board : RPXlite_DW or LITE_DW + * Tested on working at 64MHz(CPU)/32MHz(BUS),48MHz/24MHz + * with 64MB, 2 SDRAM Micron chips,MT48LC16M16A2-75. + */ + +#include <common.h> +#include <mpc8xx.h> + +/* ------------------------------------------------------------------------- */ +static long int dram_size (long int, long int *, long int); +/* ------------------------------------------------------------------------- */ + +#define _NOT_USED_ 0xFFFFCC25 + +const uint sdram_table[] = +{ + /* + * Single Read. (Offset 00h in UPMA RAM) + */ + 0x0F03CC04, 0x00ACCC24, 0x1FF74C20, /* last */ + _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_, + _NOT_USED_, + + /* + * Burst Read. (Offset 08h in UPMA RAM) + */ + 0x0F03CC04, 0x00ACCC24, 0x00FFCC20, 0x00FFCC20, + 0x01FFCC20, 0x1FF74C20, /* last */ + _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, /* last */ + _NOT_USED_, _NOT_USED_, 0x0FA00C34,0x0FFFCC35, + _NOT_USED_, + + /* + * Burst Write. (Offset 20h in UPMA RAM) + */ + 0x0F03CC00, 0x00AC0C20, 0x00FFFC20, 0x00FFFC22, + 0x01FFFC24, 0x1FF74C25, /* last */ + _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) + */ + 0x0FF0CC24, 0xFFFFCC24, _NOT_USED_, _NOT_USED_, + _NOT_USED_, _NOT_USED_, 0xEFFB8C34, 0x0FF74C34, + 0x0FFACCB4, 0x0FF5CC34, 0x0FFFCC34, 0x0FFFCCB4, + /* INIT sequence RAM WORDS + * SDRAM Initialization (offset 0x36 in UPMA RAM) + * The above definition uses the remaining space + * to establish an initialization sequence, + * which is executed by a RUN command. + * The sequence is COMMAND INHIBIT(NOP),Precharge, + * Load Mode Register,NOP,Auto Refresh. + */ + + /* + * Exception. (Offset 3Ch in UPMA RAM) + */ + 0x0FEA8C34, 0x1FB54C34, 0xFFFFCC34, _NOT_USED_ +}; + +/* + * Check Board Identity: + */ + +int checkboard (void) +{ + puts ("Board: RPXlite_DW\n") ; + return (0) ; +} + +/* ------------------------------------------------------------------------- */ + +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 */ + /*Disable Periodic timer A. */ + + udelay(200); + + /* perform SDRAM initializsation sequence */ + + memctl->memc_mcr = 0x80002236; /* SDRAM bank 0 - refresh twice */ + + udelay(1); + + memctl->memc_mamr |= MAMR_PTAE; /* enable refresh */ + + /*Enable Periodic timer A */ + + udelay (1000); + + /* Check Bank 0 Memory Size + * try 9 column mode + */ + + size9 = dram_size (CFG_MAMR_9COL, (ulong *)SDRAM_BASE_PRELIM, SDRAM_MAX_SIZE); + + /* + * Final mapping: + */ + + memctl->memc_or1 = ((-size9) & 0xFFFF0000) | CFG_OR_TIMING_SDRAM; + + udelay (1000); + + return (size9); +} + +void rpxlite_init (void) +{ + /* Enable NVRAM */ + *((uchar *) BCSR0) |= BCSR0_ENNVRAM; +} + +/* + * 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; + + memctl->memc_mamr = mamr_value; + + return (get_ram_size (base, maxsize)); +} |