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a605aacd TL |
1 | /* |
2 | * (C) Copyright 2004 | |
3 | * Wolfgang Denk, DENX Software Engineering, wd@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 <command.h> | |
26 | #include <malloc.h> | |
27 | #include <asm/immap.h> | |
28 | ||
29 | ||
30 | /* Prototypes */ | |
31 | int do_reset (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]); | |
32 | ||
33 | int checkboard (void) { | |
34 | ulong val; | |
35 | uchar val8; | |
36 | ||
37 | puts ("Board: "); | |
38 | puts("Freescale M5249EVB"); | |
39 | val8 = ((uchar)~((uchar)mbar2_readLong(MCFSIM_GPIO1_READ) >> 4)) & 0xf; | |
40 | printf(" (Switch=%1X)\n", val8); | |
41 | ||
42 | /* | |
43 | * Set LED on | |
44 | */ | |
6d0f6bcf | 45 | val = mbar2_readLong(MCFSIM_GPIO1_OUT) & ~CONFIG_SYS_GPIO1_LED; |
a605aacd TL |
46 | mbar2_writeLong(MCFSIM_GPIO1_OUT, val); /* Set LED on */ |
47 | ||
48 | return 0; | |
49 | }; | |
50 | ||
51 | ||
9973e3c6 | 52 | phys_size_t initdram (int board_type) { |
a605aacd TL |
53 | unsigned long junk = 0xa5a59696; |
54 | ||
55 | /* | |
56 | * Note: | |
57 | * RC = ([(RefreshTime/#rows) / (1/BusClk)] / 16) - 1 | |
58 | */ | |
59 | ||
6d0f6bcf | 60 | #ifdef CONFIG_SYS_FAST_CLK |
a605aacd TL |
61 | /* |
62 | * Busclk=70MHz, RefreshTime=64ms, #rows=4096 (4K) | |
63 | * SO=1, NAM=0, COC=0, RTIM=01 (6clk refresh), RC=39 | |
64 | */ | |
65 | mbar_writeShort(MCFSIM_DCR, 0x8239); | |
6d0f6bcf | 66 | #elif CONFIG_SYS_PLL_BYPASS |
a605aacd TL |
67 | /* |
68 | * Busclk=5.6448MHz, RefreshTime=64ms, #rows=8192 (8K) | |
69 | * SO=1, NAM=0, COC=0, RTIM=01 (6clk refresh), RC=02 | |
70 | */ | |
71 | mbar_writeShort(MCFSIM_DCR, 0x8202); | |
72 | #else | |
73 | /* | |
74 | * Busclk=36MHz, RefreshTime=64ms, #rows=4096 (4K) | |
75 | * SO=1, NAM=0, COC=0, RTIM=01 (6clk refresh), RC=22 (562 bus clock cycles) | |
76 | */ | |
77 | mbar_writeShort(MCFSIM_DCR, 0x8222); | |
78 | #endif | |
79 | ||
80 | /* | |
81 | * SDRAM starts at 0x0000_0000, CASL=10, CBM=010, PS=10 (16bit port), | |
82 | * PM=1 (continuous page mode) | |
83 | */ | |
84 | ||
85 | /* RE=0 (keep auto-refresh disabled while setting up registers) */ | |
86 | mbar_writeLong(MCFSIM_DACR0, 0x00003324); | |
87 | ||
88 | /* BAM=007c (bits 22,21 are bank selects; 256kB blocks) */ | |
89 | mbar_writeLong(MCFSIM_DMR0, 0x01fc0001); | |
90 | ||
91 | /** Precharge sequence **/ | |
92 | mbar_writeLong(MCFSIM_DACR0, 0x0000332c); /* Set DACR0[IP] (bit 3) */ | |
93 | *((volatile unsigned long *) 0x00) = junk; /* write to a memory location to init. precharge */ | |
94 | udelay(0x10); /* Allow several Precharge cycles */ | |
95 | ||
96 | /** Refresh Sequence **/ | |
97 | mbar_writeLong(MCFSIM_DACR0, 0x0000b324); /* Enable the refresh bit, DACR0[RE] (bit 15) */ | |
98 | udelay(0x7d0); /* Allow gobs of refresh cycles */ | |
99 | ||
100 | /** Mode Register initialization **/ | |
101 | mbar_writeLong(MCFSIM_DACR0, 0x0000b364); /* Enable DACR0[IMRS] (bit 6); RE remains enabled */ | |
102 | *((volatile unsigned long *) 0x800) = junk; /* Access RAM to initialize the mode register */ | |
103 | ||
6d0f6bcf | 104 | return CONFIG_SYS_SDRAM_SIZE * 1024 * 1024; |
a605aacd TL |
105 | }; |
106 | ||
107 | ||
108 | int testdram (void) { | |
109 | /* TODO: XXX XXX XXX */ | |
110 | printf ("DRAM test not implemented!\n"); | |
111 | ||
112 | return (0); | |
113 | } |