2 * Copyright (C) 2004 Arabella Software Ltd.
3 * Yuli Barcohen <yuli@arabellasw.com>
5 * Support for Analogue&Micro Adder boards family.
6 * Tested on AdderII and Adder87x.
8 * See file CREDITS for list of people who contributed to this
11 * This program is free software; you can redistribute it and/or
12 * modify it under the terms of the GNU General Public License as
13 * published by the Free Software Foundation; either version 2 of
14 * the License, or (at your option) any later version.
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
21 * You should have received a copy of the GNU General Public License
22 * along with this program; if not, write to the Free Software
23 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
31 * SDRAM is single Samsung K4S643232F-T70 chip.
32 * Minimal CPU frequency is 40MHz.
34 static uint sdram_table[] = {
35 /* Single read (offset 0x00 in UPM RAM) */
36 0x1f07fc24, 0xe0aefc04, 0x10adfc04, 0xe0bbbc00,
37 0x10f77c44, 0xf3fffc07, 0xfffffc04, 0xfffffc04,
39 /* Burst read (offset 0x08 in UPM RAM) */
40 0x1f07fc24, 0xe0aefc04, 0x10adfc04, 0xf0affc00,
41 0xf0affc00, 0xf0affc00, 0xf0affc00, 0x10a77c44,
42 0xf7bffc47, 0xfffffc35, 0xfffffc34, 0xfffffc35,
43 0xfffffc35, 0x1ff77c35, 0xfffffc34, 0x1fb57c35,
45 /* Single write (offset 0x18 in UPM RAM) */
46 0x1f27fc24, 0xe0aebc04, 0x00b93c00, 0x13f77c47,
47 0xfffdfc04, 0xfffffc04, 0xfffffc04, 0xfffffc04,
49 /* Burst write (offset 0x20 in UPM RAM) */
50 0x1f07fc24, 0xeeaebc00, 0x10ad7c00, 0xf0affc00,
51 0xf0affc00, 0xe0abbc00, 0x1fb77c47, 0xfffffc04,
52 0xfffffc04, 0xfffffc04, 0xfffffc04, 0xfffffc04,
53 0xfffffc04, 0xfffffc04, 0xfffffc04, 0xfffffc04,
55 /* Refresh (offset 0x30 in UPM RAM) */
56 0x1ff5fca4, 0xfffffc04, 0xfffffc04, 0xfffffc04,
57 0xfffffc84, 0xfffffc07, 0xfffffc04, 0xfffffc04,
58 0xfffffc04, 0xfffffc04, 0xfffffc04, 0xfffffc04,
60 /* Exception (offset 0x3C in UPM RAM) */
61 0xfffffc27, 0xfffffc04, 0xfffffc04, 0xfffffc04
64 long int initdram (int board_type)
66 long int msize = CFG_SDRAM_SIZE;
67 volatile immap_t *immap = (volatile immap_t *)CFG_IMMR;
68 volatile memctl8xx_t *memctl = &immap->im_memctl;
70 upmconfig(UPMA, sdram_table, sizeof(sdram_table) / sizeof(uint));
72 /* Configure SDRAM refresh */
73 memctl->memc_mptpr = MPTPR_PTP_DIV32; /* BRGCLK/32 */
75 memctl->memc_mamr = (94 << 24) | CFG_MAMR;
76 memctl->memc_mar = 0x0;
79 /* Run precharge from location 0x15 */
80 memctl->memc_mcr = 0x80002115;
83 /* Run 8 refresh cycles */
84 memctl->memc_mcr = 0x80002830;
87 memctl->memc_mar = 0x88;
90 /* Run MRS pattern from location 0x16 */
91 memctl->memc_mcr = 0x80002116;
97 int checkboard( void )
100 #if defined(CONFIG_MPC885_FAMILY)
102 #elif defined(CONFIG_MPC866_FAMILY)