3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
6 * Mark Jonas, Freescale Semiconductor, mark.jonas@motorola.com.
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 #if defined(CONFIG_MPC5200_DDR)
32 #include "mt46v16m16-75.h"
34 #include "mt48lc16m32s2-75.h"
37 #ifndef CONFIG_SYS_RAMBOOT
38 static void sdram_start (int hi_addr)
40 long hi_addr_bit = hi_addr ? 0x01000000 : 0;
42 /* unlock mode register */
43 *(vu_long *)MPC5XXX_SDRAM_CTRL = SDRAM_CONTROL | 0x80000000 | hi_addr_bit;
44 __asm__ volatile ("sync");
46 /* precharge all banks */
47 *(vu_long *)MPC5XXX_SDRAM_CTRL = SDRAM_CONTROL | 0x80000002 | hi_addr_bit;
48 __asm__ volatile ("sync");
51 /* set mode register: extended mode */
52 *(vu_long *)MPC5XXX_SDRAM_MODE = SDRAM_EMODE;
53 __asm__ volatile ("sync");
55 /* set mode register: reset DLL */
56 *(vu_long *)MPC5XXX_SDRAM_MODE = SDRAM_MODE | 0x04000000;
57 __asm__ volatile ("sync");
60 /* precharge all banks */
61 *(vu_long *)MPC5XXX_SDRAM_CTRL = SDRAM_CONTROL | 0x80000002 | hi_addr_bit;
62 __asm__ volatile ("sync");
65 *(vu_long *)MPC5XXX_SDRAM_CTRL = SDRAM_CONTROL | 0x80000004 | hi_addr_bit;
66 __asm__ volatile ("sync");
68 /* set mode register */
69 *(vu_long *)MPC5XXX_SDRAM_MODE = SDRAM_MODE;
70 __asm__ volatile ("sync");
72 /* normal operation */
73 *(vu_long *)MPC5XXX_SDRAM_CTRL = SDRAM_CONTROL | hi_addr_bit;
74 __asm__ volatile ("sync");
79 * ATTENTION: Although partially referenced initdram does NOT make real use
80 * use of CONFIG_SYS_SDRAM_BASE. The code does not work if CONFIG_SYS_SDRAM_BASE
81 * is something else than 0x00000000.
84 phys_size_t initdram (int board_type)
88 #ifndef CONFIG_SYS_RAMBOOT
91 /* setup SDRAM chip selects */
92 *(vu_long *)MPC5XXX_SDRAM_CS0CFG = 0x0000001e;/* 2G at 0x0 */
93 *(vu_long *)MPC5XXX_SDRAM_CS1CFG = 0x80000000;/* disabled */
94 __asm__ volatile ("sync");
96 /* setup config registers */
97 *(vu_long *)MPC5XXX_SDRAM_CONFIG1 = SDRAM_CONFIG1;
98 *(vu_long *)MPC5XXX_SDRAM_CONFIG2 = SDRAM_CONFIG2;
99 __asm__ volatile ("sync");
103 *(vu_long *)MPC5XXX_CDM_PORCFG = SDRAM_TAPDELAY;
104 __asm__ volatile ("sync");
107 /* find RAM size using SDRAM CS0 only */
109 test1 = get_ram_size((long *)CONFIG_SYS_SDRAM_BASE, 0x80000000);
111 test2 = get_ram_size((long *)CONFIG_SYS_SDRAM_BASE, 0x80000000);
119 /* memory smaller than 1MB is impossible */
120 if (dramsize < (1 << 20)) {
124 /* set SDRAM CS0 size according to the amount of RAM found */
126 *(vu_long *)MPC5XXX_SDRAM_CS0CFG = 0x13 + __builtin_ffs(dramsize >> 20) - 1;
128 *(vu_long *)MPC5XXX_SDRAM_CS0CFG = 0; /* disabled */
131 /* let SDRAM CS1 start right after CS0 */
132 *(vu_long *)MPC5XXX_SDRAM_CS1CFG = dramsize + 0x0000001e;/* 2G */
134 /* find RAM size using SDRAM CS1 only */
137 test2 = test1 = get_ram_size((long *)(CONFIG_SYS_SDRAM_BASE + dramsize), 0x80000000);
140 test2 = get_ram_size((long *)(CONFIG_SYS_SDRAM_BASE + dramsize), 0x80000000);
149 /* memory smaller than 1MB is impossible */
150 if (dramsize2 < (1 << 20)) {
154 /* set SDRAM CS1 size according to the amount of RAM found */
156 *(vu_long *)MPC5XXX_SDRAM_CS1CFG = dramsize
157 | (0x13 + __builtin_ffs(dramsize2 >> 20) - 1);
159 *(vu_long *)MPC5XXX_SDRAM_CS1CFG = dramsize; /* disabled */
162 #else /* CONFIG_SYS_RAMBOOT */
164 /* retrieve size of memory connected to SDRAM CS0 */
165 dramsize = *(vu_long *)MPC5XXX_SDRAM_CS0CFG & 0xFF;
166 if (dramsize >= 0x13) {
167 dramsize = (1 << (dramsize - 0x13)) << 20;
172 /* retrieve size of memory connected to SDRAM CS1 */
173 dramsize2 = *(vu_long *)MPC5XXX_SDRAM_CS1CFG & 0xFF;
174 if (dramsize2 >= 0x13) {
175 dramsize2 = (1 << (dramsize2 - 0x13)) << 20;
180 #endif /* CONFIG_SYS_RAMBOOT */
182 return dramsize + dramsize2;
185 int checkboard (void)
187 puts ("Board: CANMB\n");
191 int board_early_init_r (void)
193 *(vu_long *)MPC5XXX_BOOTCS_CFG &= ~0x1; /* clear RO */
194 *(vu_long *)MPC5XXX_BOOTCS_START =
195 *(vu_long *)MPC5XXX_CS0_START = START_REG(CONFIG_SYS_FLASH_BASE);
196 *(vu_long *)MPC5XXX_BOOTCS_STOP =
197 *(vu_long *)MPC5XXX_CS0_STOP = STOP_REG(CONFIG_SYS_FLASH_BASE, CONFIG_SYS_FLASH_SIZE);