blob: 395909d7cdafc5fb971bc39b93592d65e740050e [file] [log] [blame]
Heiko Schocher6341d9d2008-01-11 15:15:14 +01001/*
2 * (C) Copyright 2007
3 * Heiko Schocher, DENX Software Engineering, hs@denx.de.
4 *
5 * See file CREDITS for list of people who contributed to this
6 * project.
7 *
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.
12 *
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.
17 *
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,
21 * MA 02111-1307 USA
22 */
23
24#include <common.h>
25#include <mpc5xxx.h>
26#include <pci.h>
27
28#include "mt48lc16m16a2-75.h"
29
30#ifndef CFG_RAMBOOT
31static void sdram_start (int hi_addr)
32{
33 long hi_addr_bit = hi_addr ? 0x01000000 : 0;
34
35 /* unlock mode register */
36 *(vu_long *)MPC5XXX_SDRAM_CTRL = SDRAM_CONTROL | 0x80000000 | hi_addr_bit;
37 __asm__ volatile ("sync");
38
39 /* precharge all banks */
40 *(vu_long *)MPC5XXX_SDRAM_CTRL = SDRAM_CONTROL | 0x80000002 | hi_addr_bit;
41 __asm__ volatile ("sync");
42
43#if SDRAM_DDR
44 /* set mode register: extended mode */
45 *(vu_long *)MPC5XXX_SDRAM_MODE = SDRAM_EMODE;
46 __asm__ volatile ("sync");
47
48 /* set mode register: reset DLL */
49 *(vu_long *)MPC5XXX_SDRAM_MODE = SDRAM_MODE | 0x04000000;
50 __asm__ volatile ("sync");
51#endif
52
53 /* precharge all banks */
54 *(vu_long *)MPC5XXX_SDRAM_CTRL = SDRAM_CONTROL | 0x80000002 | hi_addr_bit;
55 __asm__ volatile ("sync");
56
57 /* auto refresh */
58 *(vu_long *)MPC5XXX_SDRAM_CTRL = SDRAM_CONTROL | 0x80000004 | hi_addr_bit;
59 __asm__ volatile ("sync");
60
61 /* set mode register */
62 *(vu_long *)MPC5XXX_SDRAM_MODE = SDRAM_MODE;
63 __asm__ volatile ("sync");
64
65 /* normal operation */
66 *(vu_long *)MPC5XXX_SDRAM_CTRL = SDRAM_CONTROL | hi_addr_bit;
67 __asm__ volatile ("sync");
68}
69#endif
70
71/*
72 * ATTENTION: Although partially referenced initdram does NOT make real use
73 * use of CFG_SDRAM_BASE. The code does not work if CFG_SDRAM_BASE
74 * is something else than 0x00000000.
75 */
76
77long int initdram (int board_type)
78{
79 ulong dramsize = 0;
80 ulong dramsize2 = 0;
81#ifndef CFG_RAMBOOT
82 ulong test1, test2;
83
84 /* setup SDRAM chip selects */
85 *(vu_long *)MPC5XXX_SDRAM_CS0CFG = 0x0000001b;/* 256MB at 0x0 */
86 *(vu_long *)MPC5XXX_SDRAM_CS1CFG = 0x10000000;/* disabled */
87 __asm__ volatile ("sync");
88
89 /* setup config registers */
90 *(vu_long *)MPC5XXX_SDRAM_CONFIG1 = SDRAM_CONFIG1;
91 *(vu_long *)MPC5XXX_SDRAM_CONFIG2 = SDRAM_CONFIG2;
92 __asm__ volatile ("sync");
93
94#if SDRAM_DDR && SDRAM_TAPDELAY
95 /* set tap delay */
96 *(vu_long *)MPC5XXX_CDM_PORCFG = SDRAM_TAPDELAY;
97 __asm__ volatile ("sync");
98#endif
99
100 /* find RAM size using SDRAM CS0 only */
101 sdram_start(0);
102 test1 = (ulong )get_ram_size((long *)CFG_SDRAM_BASE, 0x10000000);
103 sdram_start(1);
104 test2 = (ulong )get_ram_size((long *)CFG_SDRAM_BASE, 0x10000000);
105 if (test1 > test2) {
106 sdram_start(0);
107 dramsize = test1;
108 } else {
109 dramsize = test2;
110 }
111
112 /* memory smaller than 1MB is impossible */
113 if (dramsize < (1 << 20)) {
114 dramsize = 0;
115 }
116
117 /* set SDRAM CS0 size according to the amount of RAM found */
118 if (dramsize > 0) {
119 *(vu_long *)MPC5XXX_SDRAM_CS0CFG = 0x13 + __builtin_ffs(dramsize >> 20) - 1;
120 } else {
121 *(vu_long *)MPC5XXX_SDRAM_CS0CFG = 0; /* disabled */
122 }
123
124#else /* CFG_RAMBOOT */
125
126 /* retrieve size of memory connected to SDRAM CS0 */
127 dramsize = *(vu_long *)MPC5XXX_SDRAM_CS0CFG & 0xFF;
128 if (dramsize >= 0x13) {
129 dramsize = (1 << (dramsize - 0x13)) << 20;
130 } else {
131 dramsize = 0;
132 }
133
134 /* retrieve size of memory connected to SDRAM CS1 */
135 dramsize2 = *(vu_long *)MPC5XXX_SDRAM_CS1CFG & 0xFF;
136 if (dramsize2 >= 0x13) {
137 dramsize2 = (1 << (dramsize2 - 0x13)) << 20;
138 } else {
139 dramsize2 = 0;
140 }
141
142#endif /* CFG_RAMBOOT */
143
144 return dramsize + dramsize2;
145}
146
147int checkboard (void)
148{
149 puts ("Board: MUNICes\n");
150 return 0;
151}
152
153#ifdef CONFIG_PCI
154static struct pci_controller hose;
155
156extern void pci_mpc5xxx_init(struct pci_controller *);
157
158void pci_init_board(void)
159{
160 pci_mpc5xxx_init(&hose);
161}
162#endif
163
164#if defined(CONFIG_OF_LIBFDT) && defined(CONFIG_OF_BOARD_SETUP)
165void
166ft_board_setup(void *blob, bd_t *bd)
167{
168 ft_cpu_setup(blob, bd);
169}
170#endif