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d96f41e0 SR |
1 | /* |
2 | * (C) Copyright 2005 | |
3 | * Stefan Roese, DENX Software Engineering, sr@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 | ||
25 | #include <common.h> | |
26 | #include <asm/processor.h> | |
27 | #include <asm/immap_85xx.h> | |
28 | #include <asm/processor.h> | |
29 | #include <asm/mmu.h> | |
d96f41e0 SR |
30 | |
31 | struct sdram_conf_s { | |
32 | unsigned long size; | |
33 | unsigned long reg; | |
34 | }; | |
35 | ||
36 | typedef struct sdram_conf_s sdram_conf_t; | |
37 | ||
38 | sdram_conf_t ddr_cs_conf[] = { | |
39 | {(512 << 20), 0x80000202}, /* 512MB, 14x10(4) */ | |
40 | {(256 << 20), 0x80000102}, /* 256MB, 13x10(4) */ | |
41 | {(128 << 20), 0x80000101}, /* 128MB, 13x9(4) */ | |
42 | {(64 << 20), 0x80000001}, /* 64MB, 12x9(4) */ | |
43 | }; | |
44 | ||
45 | #define N_DDR_CS_CONF (sizeof(ddr_cs_conf) / sizeof(ddr_cs_conf[0])) | |
46 | ||
47 | int cas_latency(void); | |
48 | ||
49 | /* | |
50 | * Autodetect onboard DDR SDRAM on 85xx platforms | |
51 | * | |
52 | * NOTE: Some of the hardcoded values are hardware dependant, | |
53 | * so this should be extended for other future boards | |
54 | * using this routine! | |
55 | */ | |
56 | long int sdram_setup(int casl) | |
57 | { | |
58 | int i; | |
04db4008 | 59 | volatile ccsr_ddr_t *ddr = (void *)(CFG_MPC85xx_DDR_ADDR); |
d96f41e0 SR |
60 | unsigned long cfg_ddr_timing1; |
61 | unsigned long cfg_ddr_mode; | |
62 | ||
63 | /* | |
64 | * Disable memory controller. | |
65 | */ | |
66 | ddr->cs0_config = 0; | |
67 | ddr->sdram_cfg = 0; | |
68 | ||
69 | switch (casl) { | |
70 | case 20: | |
71 | cfg_ddr_timing1 = 0x47405331 | (3 << 16); | |
72 | cfg_ddr_mode = 0x40020002 | (2 << 4); | |
73 | break; | |
74 | ||
75 | case 25: | |
76 | cfg_ddr_timing1 = 0x47405331 | (4 << 16); | |
77 | cfg_ddr_mode = 0x40020002 | (6 << 4); | |
78 | break; | |
79 | ||
80 | case 30: | |
81 | default: | |
82 | cfg_ddr_timing1 = 0x47405331 | (5 << 16); | |
83 | cfg_ddr_mode = 0x40020002 | (3 << 4); | |
84 | break; | |
85 | } | |
86 | ||
87 | ddr->cs0_bnds = (ddr_cs_conf[0].size - 1) >> 24; | |
88 | ddr->cs0_config = ddr_cs_conf[0].reg; | |
89 | ddr->timing_cfg_1 = cfg_ddr_timing1; | |
90 | ddr->timing_cfg_2 = 0x00000800; /* P9-45,may need tuning */ | |
91 | ddr->sdram_mode = cfg_ddr_mode; | |
92 | ddr->sdram_interval = 0x05160100; /* autocharge,no open page */ | |
93 | ddr->err_disable = 0x0000000D; | |
94 | ||
95 | asm ("sync;isync;msync"); | |
96 | udelay(1000); | |
97 | ||
98 | ddr->sdram_cfg = 0xc2000000; /* unbuffered,no DYN_PWR */ | |
99 | asm ("sync; isync; msync"); | |
100 | udelay(1000); | |
101 | ||
102 | for (i=0; i<N_DDR_CS_CONF; i++) { | |
103 | ddr->cs0_config = ddr_cs_conf[i].reg; | |
104 | ||
105 | if (get_ram_size(0, ddr_cs_conf[i].size) == ddr_cs_conf[i].size) { | |
106 | /* | |
107 | * OK, size detected -> all done | |
108 | */ | |
109 | return ddr_cs_conf[i].size; | |
110 | } | |
111 | } | |
112 | ||
113 | return 0; /* nothing found ! */ | |
114 | } | |
115 | ||
116 | void board_add_ram_info(int use_default) | |
117 | { | |
118 | int casl; | |
119 | ||
120 | if (use_default) | |
121 | casl = CONFIG_DDR_DEFAULT_CL; | |
122 | else | |
123 | casl = cas_latency(); | |
124 | ||
125 | puts(" (CL="); | |
126 | switch (casl) { | |
127 | case 20: | |
128 | puts("2)"); | |
129 | break; | |
130 | ||
131 | case 25: | |
132 | puts("2.5)"); | |
133 | break; | |
134 | ||
135 | case 30: | |
136 | puts("3)"); | |
137 | break; | |
138 | } | |
139 | } | |
140 | ||
141 | long int initdram (int board_type) | |
142 | { | |
143 | long dram_size = 0; | |
144 | int casl; | |
145 | ||
146 | #if defined(CONFIG_DDR_DLL) | |
147 | /* | |
148 | * This DLL-Override only used on TQM8540 and TQM8560 | |
149 | */ | |
150 | { | |
f59b55a5 | 151 | volatile ccsr_gur_t *gur = (void *)(CFG_MPC85xx_GUTS_ADDR); |
d96f41e0 SR |
152 | int i,x; |
153 | ||
154 | x = 10; | |
155 | ||
156 | /* | |
157 | * Work around to stabilize DDR DLL | |
158 | */ | |
159 | gur->ddrdllcr = 0x81000000; | |
160 | asm("sync;isync;msync"); | |
161 | udelay (200); | |
162 | while (gur->ddrdllcr != 0x81000100) { | |
163 | gur->devdisr = gur->devdisr | 0x00010000; | |
164 | asm("sync;isync;msync"); | |
165 | for (i=0; i<x; i++) | |
166 | ; | |
167 | gur->devdisr = gur->devdisr & 0xfff7ffff; | |
168 | asm("sync;isync;msync"); | |
169 | x++; | |
170 | } | |
171 | } | |
172 | #endif | |
173 | ||
174 | casl = cas_latency(); | |
175 | dram_size = sdram_setup(casl); | |
176 | if ((dram_size == 0) && (casl != CONFIG_DDR_DEFAULT_CL)) { | |
177 | /* | |
178 | * Try again with default CAS latency | |
179 | */ | |
180 | puts("Problem with CAS lantency"); | |
181 | board_add_ram_info(1); | |
182 | puts(", using default CL!\n"); | |
183 | casl = CONFIG_DDR_DEFAULT_CL; | |
184 | dram_size = sdram_setup(casl); | |
185 | puts(" "); | |
186 | } | |
187 | ||
188 | return dram_size; | |
189 | } | |
190 | ||
191 | #if defined(CFG_DRAM_TEST) | |
192 | int testdram (void) | |
193 | { | |
194 | uint *pstart = (uint *) CFG_MEMTEST_START; | |
195 | uint *pend = (uint *) CFG_MEMTEST_END; | |
196 | uint *p; | |
197 | ||
198 | printf ("SDRAM test phase 1:\n"); | |
199 | for (p = pstart; p < pend; p++) | |
200 | *p = 0xaaaaaaaa; | |
201 | ||
202 | for (p = pstart; p < pend; p++) { | |
203 | if (*p != 0xaaaaaaaa) { | |
204 | printf ("SDRAM test fails at: %08x\n", (uint) p); | |
205 | return 1; | |
206 | } | |
207 | } | |
208 | ||
209 | printf ("SDRAM test phase 2:\n"); | |
210 | for (p = pstart; p < pend; p++) | |
211 | *p = 0x55555555; | |
212 | ||
213 | for (p = pstart; p < pend; p++) { | |
214 | if (*p != 0x55555555) { | |
215 | printf ("SDRAM test fails at: %08x\n", (uint) p); | |
216 | return 1; | |
217 | } | |
218 | } | |
219 | ||
220 | printf ("SDRAM test passed.\n"); | |
221 | return 0; | |
222 | } | |
223 | #endif |