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1 | /* | |
2 | * (C) Copyright 2009 | |
3 | * Matthias Fuchs, esd gmbh, matthias.fuchs@esd.eu | |
4 | * | |
5 | * (C) Copyright 2006 | |
6 | * Sylvie Gohl, AMCC/IBM, gohl.sylvie@fr.ibm.com | |
7 | * Jacqueline Pira-Ferriol, AMCC/IBM, jpira-ferriol@fr.ibm.com | |
8 | * Thierry Roman, AMCC/IBM, thierry_roman@fr.ibm.com | |
9 | * Alain Saurel, AMCC/IBM, alain.saurel@fr.ibm.com | |
10 | * Robert Snyder, AMCC/IBM, rob.snyder@fr.ibm.com | |
11 | * | |
12 | * (C) Copyright 2006-2007 | |
13 | * Stefan Roese, DENX Software Engineering, sr@denx.de. | |
14 | * | |
15 | * SPDX-License-Identifier: GPL-2.0+ | |
16 | */ | |
17 | ||
18 | /* define DEBUG for debug output */ | |
19 | #undef DEBUG | |
20 | ||
21 | #include <common.h> | |
22 | #include <asm/processor.h> | |
23 | #include <asm/io.h> | |
24 | #include <asm/mmu.h> | |
25 | #include <asm/ppc440.h> | |
26 | ||
27 | DECLARE_GLOBAL_DATA_PTR; | |
28 | ||
29 | extern int denali_wait_for_dlllock(void); | |
30 | extern void denali_core_search_data_eye(void); | |
31 | ||
32 | struct sdram_conf_s { | |
33 | ulong size; | |
34 | int rows; | |
35 | int banks; | |
36 | }; | |
37 | ||
38 | struct sdram_conf_s sdram_conf[] = { | |
39 | {(1024 << 20), 14, 8}, /* 1GByte: 4x2GBit, 14x10, 8 banks */ | |
40 | {(512 << 20), 13, 8}, /* 512MByte: 4x1GBit, 13x10, 8 banks */ | |
41 | {(256 << 20), 13, 4}, /* 256MByte: 4x512MBit, 13x10, 4 banks */ | |
42 | }; | |
43 | ||
44 | /* | |
45 | * initdram -- 440EPx's DDR controller is a DENALI Core | |
46 | */ | |
47 | int initdram_by_rb(int rows, int banks) | |
48 | { | |
49 | ulong speed = get_bus_freq(0); | |
50 | ||
51 | mtsdram(DDR0_02, 0x00000000); | |
52 | ||
53 | mtsdram(DDR0_00, 0x0000190A); | |
54 | mtsdram(DDR0_01, 0x01000000); | |
55 | mtsdram(DDR0_03, 0x02030602); | |
56 | mtsdram(DDR0_04, 0x0A020200); | |
57 | mtsdram(DDR0_05, 0x02020308); | |
58 | mtsdram(DDR0_06, 0x0102C812); | |
59 | mtsdram(DDR0_07, 0x000D0100); | |
60 | mtsdram(DDR0_08, 0x02430001); | |
61 | mtsdram(DDR0_09, 0x00011D5F); | |
62 | mtsdram(DDR0_10, 0x00000100); | |
63 | mtsdram(DDR0_11, 0x0027C800); | |
64 | mtsdram(DDR0_12, 0x00000003); | |
65 | mtsdram(DDR0_14, 0x00000000); | |
66 | mtsdram(DDR0_17, 0x19000000); | |
67 | mtsdram(DDR0_18, 0x19191919); | |
68 | mtsdram(DDR0_19, 0x19191919); | |
69 | mtsdram(DDR0_20, 0x0B0B0B0B); | |
70 | mtsdram(DDR0_21, 0x0B0B0B0B); | |
71 | mtsdram(DDR0_22, 0x00267F0B); | |
72 | mtsdram(DDR0_23, 0x00000000); | |
73 | mtsdram(DDR0_24, 0x01010002); | |
74 | if (speed > 133333334) | |
75 | mtsdram(DDR0_26, 0x5B26050C); | |
76 | else | |
77 | mtsdram(DDR0_26, 0x5B260408); | |
78 | mtsdram(DDR0_27, 0x0000682B); | |
79 | mtsdram(DDR0_28, 0x00000000); | |
80 | mtsdram(DDR0_31, 0x00000000); | |
81 | ||
82 | mtsdram(DDR0_42, | |
83 | DDR0_42_ADDR_PINS_DECODE(14 - rows) | | |
84 | 0x00000006); | |
85 | mtsdram(DDR0_43, | |
86 | DDR0_43_EIGHT_BANK_MODE_ENCODE(8 == banks ? 1 : 0) | | |
87 | 0x030A0200); | |
88 | ||
89 | mtsdram(DDR0_44, 0x00000003); | |
90 | mtsdram(DDR0_02, 0x00000001); | |
91 | ||
92 | denali_wait_for_dlllock(); | |
93 | ||
94 | #ifdef CONFIG_DDR_DATA_EYE | |
95 | /* | |
96 | * Perform data eye search if requested. | |
97 | */ | |
98 | denali_core_search_data_eye(); | |
99 | #endif | |
100 | /* | |
101 | * Clear possible errors resulting from data-eye-search. | |
102 | * If not done, then we could get an interrupt later on when | |
103 | * exceptions are enabled. | |
104 | */ | |
105 | set_mcsr(get_mcsr()); | |
106 | ||
107 | return 0; | |
108 | } | |
109 | ||
110 | int initdram(void) | |
111 | { | |
112 | phys_size_t size; | |
113 | int n; | |
114 | ||
115 | /* go through supported memory configurations */ | |
116 | for (n = 0; n < ARRAY_SIZE(sdram_conf); n++) { | |
117 | size = sdram_conf[n].size; | |
118 | ||
119 | /* program TLB entries */ | |
120 | program_tlb(0, CONFIG_SYS_SDRAM_BASE, size, | |
121 | TLB_WORD2_I_ENABLE); | |
122 | ||
123 | /* | |
124 | * setup denali core | |
125 | */ | |
126 | initdram_by_rb(sdram_conf[n].rows, | |
127 | sdram_conf[n].banks); | |
128 | ||
129 | /* check for suitable configuration */ | |
130 | if (get_ram_size(CONFIG_SYS_SDRAM_BASE, size) == size) { | |
131 | gd->ram_size = size; | |
132 | return 0; | |
133 | } | |
134 | ||
135 | /* delete TLB entries */ | |
136 | remove_tlb(CONFIG_SYS_SDRAM_BASE, size); | |
137 | } | |
138 | ||
139 | return -ENXIO; | |
140 | } |