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1 | /* | |
2 | * (C) Copyright 2000-2003 | |
3 | * Wolfgang Denk, DENX Software Engineering, wd@denx.de. | |
4 | * | |
5 | * Copyright (C) 2004-2007 Freescale Semiconductor, Inc. | |
6 | * Hayden Fraser (Hayden.Fraser@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 <asm/immap.h> | |
29 | ||
30 | int checkboard(void) | |
31 | { | |
32 | puts("Board: "); | |
33 | puts("Freescale MCF5253 EVBE\n"); | |
34 | return 0; | |
35 | }; | |
36 | ||
37 | phys_size_t initdram(int board_type) | |
38 | { | |
39 | /* | |
40 | * Check to see if the SDRAM has already been initialized | |
41 | * by a run control tool | |
42 | */ | |
43 | if (!(mbar_readLong(MCFSIM_DCR) & 0x8000)) { | |
44 | u32 RC, dramsize; | |
45 | ||
46 | RC = (CONFIG_SYS_CLK / 1000000) >> 1; | |
47 | RC = (RC * 15) >> 4; | |
48 | ||
49 | /* Initialize DRAM Control Register: DCR */ | |
50 | mbar_writeShort(MCFSIM_DCR, (0x8400 | RC)); | |
51 | asm("nop"); | |
52 | ||
53 | mbar_writeLong(MCFSIM_DACR0, 0x00002320); | |
54 | asm("nop"); | |
55 | ||
56 | /* Initialize DMR0 */ | |
57 | dramsize = ((CONFIG_SYS_SDRAM_SIZE << 20) - 1) & 0xFFFC0000; | |
58 | mbar_writeLong(MCFSIM_DMR0, dramsize | 1); | |
59 | asm("nop"); | |
60 | ||
61 | mbar_writeLong(MCFSIM_DACR0, 0x00002328); | |
62 | asm("nop"); | |
63 | ||
64 | /* Write to this block to initiate precharge */ | |
65 | *(u32 *) (CONFIG_SYS_SDRAM_BASE) = 0xa5a5a5a5; | |
66 | asm("nop"); | |
67 | ||
68 | /* Set RE bit in DACR */ | |
69 | mbar_writeLong(MCFSIM_DACR0, | |
70 | mbar_readLong(MCFSIM_DACR0) | 0x8000); | |
71 | asm("nop"); | |
72 | ||
73 | /* Wait for at least 8 auto refresh cycles to occur */ | |
74 | udelay(500); | |
75 | ||
76 | /* Finish the configuration by issuing the MRS */ | |
77 | mbar_writeLong(MCFSIM_DACR0, | |
78 | mbar_readLong(MCFSIM_DACR0) | 0x0040); | |
79 | asm("nop"); | |
80 | ||
81 | *(u32 *) (CONFIG_SYS_SDRAM_BASE + 0x800) = 0xa5a5a5a5; | |
82 | } | |
83 | ||
84 | return CONFIG_SYS_SDRAM_SIZE * 1024 * 1024; | |
85 | } | |
86 | ||
87 | int testdram(void) | |
88 | { | |
89 | /* TODO: XXX XXX XXX */ | |
90 | printf("DRAM test not implemented!\n"); | |
91 | ||
92 | return (0); | |
93 | } | |
94 | ||
95 | #ifdef CONFIG_CMD_IDE | |
96 | #include <ata.h> | |
97 | int ide_preinit(void) | |
98 | { | |
99 | return (0); | |
100 | } | |
101 | ||
102 | void ide_set_reset(int idereset) | |
103 | { | |
104 | volatile atac_t *ata = (atac_t *) CONFIG_SYS_ATA_BASE_ADDR; | |
105 | long period; | |
106 | /* t1, t2, t3, t4, t5, t6, t9, tRD, tA */ | |
107 | int piotms[5][9] = { {70, 165, 60, 30, 50, 5, 20, 0, 35}, /* PIO 0 */ | |
108 | {50, 125, 45, 20, 35, 5, 15, 0, 35}, /* PIO 1 */ | |
109 | {30, 100, 30, 15, 20, 5, 10, 0, 35}, /* PIO 2 */ | |
110 | {30, 80, 30, 10, 20, 5, 10, 0, 35}, /* PIO 3 */ | |
111 | {25, 70, 20, 10, 20, 5, 10, 0, 35} /* PIO 4 */ | |
112 | }; | |
113 | ||
114 | if (idereset) { | |
115 | ata->cr = 0; /* control reset */ | |
116 | udelay(100); | |
117 | } else { | |
118 | mbar2_writeLong(CIM_MISCCR, CIM_MISCCR_CPUEND); | |
119 | ||
120 | #define CALC_TIMING(t) (t + period - 1) / period | |
121 | period = 1000000000 / (CONFIG_SYS_CLK / 2); /* period in ns */ | |
122 | ||
123 | /*ata->ton = CALC_TIMING (180); */ | |
124 | ata->t1 = CALC_TIMING(piotms[2][0]); | |
125 | ata->t2w = CALC_TIMING(piotms[2][1]); | |
126 | ata->t2r = CALC_TIMING(piotms[2][1]); | |
127 | ata->ta = CALC_TIMING(piotms[2][8]); | |
128 | ata->trd = CALC_TIMING(piotms[2][7]); | |
129 | ata->t4 = CALC_TIMING(piotms[2][3]); | |
130 | ata->t9 = CALC_TIMING(piotms[2][6]); | |
131 | ||
132 | ata->cr = 0x40; /* IORDY enable */ | |
133 | udelay(2000); | |
134 | ata->cr |= 0x01; /* IORDY enable */ | |
135 | } | |
136 | } | |
137 | #endif /* CONFIG_CMD_IDE */ |