3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
5 * See file CREDITS for list of people who contributed to this
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License as
10 * published by the Free Software Foundation; either version 2 of
11 * the License, or (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
25 * Yoo. Jonghoon, IPone, yooth@ipone.co.kr
26 * U-Boot port on RPXlite board
28 * DRAM related UPMA register values are modified.
29 * See RPXLite engineering note : 50MHz/60ns - UPM RAM WORDS
35 /* ------------------------------------------------------------------------- */
37 static long int dram_size (long int, long int *, long int);
39 /* ------------------------------------------------------------------------- */
41 #define _NOT_USED_ 0xFFFFCC25
43 const uint sdram_table[] = {
45 * Single Read. (Offset 00h in UPMA RAM)
47 0xCFFFCC24, 0x0FFFCC04, 0X0CAFCC04, 0X03AFCC08,
48 0x3FBFCC27, /* last */
49 _NOT_USED_, _NOT_USED_, _NOT_USED_,
52 * Burst Read. (Offset 08h in UPMA RAM)
54 0xCFFFCC24, 0x0FFFCC04, 0x0CAFCC84, 0x03AFCC88,
55 0x3FBFCC27, /* last */
56 _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
57 _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
58 _NOT_USED_, _NOT_USED_, _NOT_USED_,
61 * Single Write. (Offset 18h in UPMA RAM)
63 0xCFFFCC24, 0x0FFFCC04, 0x0CFFCC04, 0x03FFCC00,
64 0x3FFFCC27, /* last */
65 _NOT_USED_, _NOT_USED_, _NOT_USED_,
68 * Burst Write. (Offset 20h in UPMA RAM)
70 0xCFFFCC24, 0x0FFFCC04, 0x0CFFCC80, 0x03FFCC8C,
71 0x0CFFCC00, 0x33FFCC27, /* last */
72 _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
73 _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
74 _NOT_USED_, _NOT_USED_,
77 * Refresh. (Offset 30h in UPMA RAM)
79 0xC0FFCC24, 0x03FFCC24, 0x0FFFCC24, 0x0FFFCC24,
80 0x3FFFCC27, /* last */
81 _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
82 _NOT_USED_, _NOT_USED_, _NOT_USED_,
85 * Exception. (Offset 3Ch in UPMA RAM)
87 _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_
90 /* ------------------------------------------------------------------------- */
94 * Check Board Identity:
99 puts ("Board: RPXlite\n");
103 /* ------------------------------------------------------------------------- */
105 long int initdram (int board_type)
107 volatile immap_t *immap = (immap_t *) CFG_IMMR;
108 volatile memctl8xx_t *memctl = &immap->im_memctl;
111 upmconfig (UPMA, (uint *) sdram_table,
112 sizeof (sdram_table) / sizeof (uint));
114 /* Refresh clock prescalar */
115 memctl->memc_mptpr = CFG_MPTPR;
117 memctl->memc_mar = 0x00000000;
119 /* Map controller banks 1 to the SDRAM bank */
120 memctl->memc_or1 = CFG_OR1_PRELIM;
121 memctl->memc_br1 = CFG_BR1_PRELIM;
123 memctl->memc_mamr = CFG_MAMR_10COL & (~(MAMR_PTAE)); /* no refresh yet */
127 /* perform SDRAM initializsation sequence */
129 memctl->memc_mcr = 0x80002230; /* SDRAM bank 0 - refresh twice */
132 memctl->memc_mamr |= MAMR_PTAE; /* enable refresh */
136 /* Check Bank 0 Memory Size
140 size10 = dram_size (CFG_MAMR_10COL, SDRAM_BASE_PRELIM,
146 /* ------------------------------------------------------------------------- */
149 * Check memory range for valid RAM. A simple memory test determines
150 * the actually available RAM size between addresses `base' and
151 * `base + maxsize'. Some (not all) hardware errors are detected:
152 * - short between address lines
153 * - short between data lines
156 static long int dram_size (long int mamr_value, long int *base,
159 volatile immap_t *immap = (immap_t *) CFG_IMMR;
160 volatile memctl8xx_t *memctl = &immap->im_memctl;
162 memctl->memc_mamr = mamr_value;
164 return (get_ram_size (base, maxsize));