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05316f8e TL |
1 | /* |
2 | * (C) Copyright 2000-2003 | |
3 | * Wolfgang Denk, DENX Software Engineering, wd@denx.de. | |
4 | * | |
5 | * Copyright (C) 2004-2008 Freescale Semiconductor, Inc. | |
6 | * TsiChung Liew (Tsi-Chung.Liew@freescale.com) | |
7 | * | |
8 | * See file CREDITS for list of people who contributed to this | |
9 | * project. | |
10 | * | |
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. | |
15 | * | |
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. | |
20 | * | |
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, | |
24 | * MA 02111-1307 USA | |
25 | */ | |
26 | ||
27 | #include <common.h> | |
28 | #include <spi.h> | |
29 | #include <asm/immap.h> | |
30 | ||
31 | DECLARE_GLOBAL_DATA_PTR; | |
32 | ||
33 | int checkboard(void) | |
34 | { | |
35 | /* | |
36 | * need to to: | |
37 | * Check serial flash size. if 2mb evb, else 8mb demo | |
38 | */ | |
39 | puts("Board: "); | |
40 | puts("Freescale M54451 EVB\n"); | |
41 | return 0; | |
42 | }; | |
43 | ||
44 | phys_size_t initdram(int board_type) | |
45 | { | |
46 | u32 dramsize; | |
47 | #ifdef CONFIG_CF_SBF | |
48 | /* | |
49 | * Serial Boot: The dram is already initialized in start.S | |
50 | * only require to return DRAM size | |
51 | */ | |
6d0f6bcf | 52 | dramsize = CONFIG_SYS_SDRAM_SIZE * 0x100000; |
05316f8e TL |
53 | #else |
54 | volatile sdramc_t *sdram = (volatile sdramc_t *)(MMAP_SDRAM); | |
55 | volatile gpio_t *gpio = (volatile gpio_t *)(MMAP_GPIO); | |
56 | u32 i; | |
57 | ||
6d0f6bcf | 58 | dramsize = CONFIG_SYS_SDRAM_SIZE * 0x100000; |
05316f8e | 59 | |
6d0f6bcf JCPV |
60 | if ((sdram->sdcfg1 == CONFIG_SYS_SDRAM_CFG1) && |
61 | (sdram->sdcfg2 == CONFIG_SYS_SDRAM_CFG2)) | |
05316f8e TL |
62 | return dramsize; |
63 | ||
64 | for (i = 0x13; i < 0x20; i++) { | |
65 | if (dramsize == (1 << i)) | |
66 | break; | |
67 | } | |
68 | i--; | |
69 | ||
6d0f6bcf | 70 | gpio->mscr_sdram = CONFIG_SYS_SDRAM_DRV_STRENGTH; |
05316f8e | 71 | |
6d0f6bcf | 72 | sdram->sdcs0 = (CONFIG_SYS_SDRAM_BASE | i); |
05316f8e | 73 | |
6d0f6bcf JCPV |
74 | sdram->sdcfg1 = CONFIG_SYS_SDRAM_CFG1; |
75 | sdram->sdcfg2 = CONFIG_SYS_SDRAM_CFG2; | |
05316f8e TL |
76 | |
77 | udelay(200); | |
78 | ||
79 | /* Issue PALL */ | |
6d0f6bcf | 80 | sdram->sdcr = CONFIG_SYS_SDRAM_CTRL | 2; |
05316f8e TL |
81 | __asm__("nop"); |
82 | ||
83 | /* Perform two refresh cycles */ | |
6d0f6bcf | 84 | sdram->sdcr = CONFIG_SYS_SDRAM_CTRL | 4; |
05316f8e | 85 | __asm__("nop"); |
6d0f6bcf | 86 | sdram->sdcr = CONFIG_SYS_SDRAM_CTRL | 4; |
05316f8e TL |
87 | __asm__("nop"); |
88 | ||
89 | /* Issue LEMR */ | |
6d0f6bcf | 90 | sdram->sdmr = CONFIG_SYS_SDRAM_MODE; |
05316f8e | 91 | __asm__("nop"); |
6d0f6bcf | 92 | sdram->sdmr = CONFIG_SYS_SDRAM_EMOD; |
05316f8e TL |
93 | __asm__("nop"); |
94 | ||
6d0f6bcf | 95 | sdram->sdcr = (CONFIG_SYS_SDRAM_CTRL & ~0x80000000) | 0x10000000; |
05316f8e TL |
96 | |
97 | udelay(100); | |
98 | #endif | |
99 | return (dramsize); | |
100 | }; | |
101 | ||
102 | int testdram(void) | |
103 | { | |
104 | /* TODO: XXX XXX XXX */ | |
105 | printf("DRAM test not implemented!\n"); | |
106 | ||
107 | return (0); | |
108 | } |