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b765ffb7 SR |
1 | /* |
2 | * (C) Copyright 2006 | |
83b4cfa3 | 3 | * Sylvie Gohl, AMCC/IBM, gohl.sylvie@fr.ibm.com |
b765ffb7 | 4 | * Jacqueline Pira-Ferriol, AMCC/IBM, jpira-ferriol@fr.ibm.com |
83b4cfa3 WD |
5 | * Thierry Roman, AMCC/IBM, thierry_roman@fr.ibm.com |
6 | * Alain Saurel, AMCC/IBM, alain.saurel@fr.ibm.com | |
7 | * Robert Snyder, AMCC/IBM, rob.snyder@fr.ibm.com | |
b765ffb7 | 8 | * |
f47b048b | 9 | * (C) Copyright 2007-2013 |
b765ffb7 SR |
10 | * Stefan Roese, DENX Software Engineering, sr@denx.de. |
11 | * | |
12 | * This program is free software; you can redistribute it and/or | |
13 | * modify it under the terms of the GNU General Public License as | |
14 | * published by the Free Software Foundation; either version 2 of | |
15 | * the License, or (at your option) any later version. | |
16 | * | |
17 | * This program is distributed in the hope that it will be useful, | |
18 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
20 | * GNU General Public License for more details. | |
21 | * | |
22 | * You should have received a copy of the GNU General Public License | |
23 | * along with this program; if not, write to the Free Software | |
24 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, | |
25 | * MA 02111-1307 USA | |
26 | */ | |
27 | ||
28 | /* define DEBUG for debugging output (obviously ;-)) */ | |
29 | #if 0 | |
30 | #define DEBUG | |
31 | #endif | |
32 | ||
33 | #include <common.h> | |
34 | #include <asm/processor.h> | |
35 | #include <asm/mmu.h> | |
36 | #include <asm/io.h> | |
135846d6 | 37 | #include <asm/cache.h> |
b36df561 | 38 | #include <asm/ppc440.h> |
7e4a0d25 | 39 | #include <watchdog.h> |
b765ffb7 | 40 | |
b765ffb7 SR |
41 | /* |
42 | * This DDR2 setup code can dynamically setup the TLB entries for the DDR2 memory | |
43 | * region. Right now the cache should still be disabled in U-Boot because of the | |
44 | * EMAC driver, that need it's buffer descriptor to be located in non cached | |
45 | * memory. | |
46 | * | |
47 | * If at some time this restriction doesn't apply anymore, just define | |
a321148b | 48 | * CONFIG_4xx_DCACHE in the board config file and this code should setup |
b765ffb7 SR |
49 | * everything correctly. |
50 | */ | |
a321148b | 51 | #ifdef CONFIG_4xx_DCACHE |
83b4cfa3 | 52 | #define MY_TLB_WORD2_I_ENABLE 0 /* enable caching on SDRAM */ |
b765ffb7 | 53 | #else |
83b4cfa3 | 54 | #define MY_TLB_WORD2_I_ENABLE TLB_WORD2_I_ENABLE /* disable caching on SDRAM */ |
b765ffb7 SR |
55 | #endif |
56 | ||
ef16fccf LJ |
57 | /*-----------------------------------------------------------------------------+ |
58 | * Prototypes | |
59 | *-----------------------------------------------------------------------------*/ | |
60 | extern int denali_wait_for_dlllock(void); | |
61 | extern void denali_core_search_data_eye(void); | |
62 | extern void dcbz_area(u32 start_address, u32 num_bytes); | |
b765ffb7 | 63 | |
b765ffb7 SR |
64 | static u32 is_ecc_enabled(void) |
65 | { | |
66 | u32 val; | |
67 | ||
68 | mfsdram(DDR0_22, val); | |
69 | val &= DDR0_22_CTRL_RAW_MASK; | |
70 | if (val) | |
71 | return 1; | |
72 | else | |
73 | return 0; | |
74 | } | |
75 | ||
76 | void board_add_ram_info(int use_default) | |
77 | { | |
087dfdb7 | 78 | PPC4xx_SYS_INFO board_cfg; |
b765ffb7 SR |
79 | u32 val; |
80 | ||
81 | if (is_ecc_enabled()) | |
82 | puts(" (ECC"); | |
83 | else | |
84 | puts(" (ECC not"); | |
85 | ||
86 | get_sys_info(&board_cfg); | |
b002144e | 87 | printf(" enabled, %ld MHz", (board_cfg.freqPLB * 2) / 1000000); |
b765ffb7 SR |
88 | |
89 | mfsdram(DDR0_03, val); | |
90 | val = DDR0_03_CASLAT_DECODE(val); | |
91 | printf(", CL%d)", val); | |
92 | } | |
b765ffb7 | 93 | |
b765ffb7 SR |
94 | #ifdef CONFIG_DDR_ECC |
95 | static void wait_ddr_idle(void) | |
96 | { | |
97 | /* | |
98 | * Controller idle status cannot be determined for Denali | |
99 | * DDR2 code. Just return here. | |
100 | */ | |
101 | } | |
102 | ||
b765ffb7 SR |
103 | static void program_ecc(u32 start_address, |
104 | u32 num_bytes, | |
105 | u32 tlb_word2_i_value) | |
106 | { | |
b765ffb7 | 107 | u32 val; |
7e4a0d25 | 108 | u32 current_addr = start_address; |
135846d6 | 109 | u32 size; |
7e4a0d25 | 110 | int bytes_remaining; |
b765ffb7 SR |
111 | |
112 | sync(); | |
b765ffb7 SR |
113 | wait_ddr_idle(); |
114 | ||
7e4a0d25 SR |
115 | /* |
116 | * Because of 440EPx errata CHIP 11, we don't touch the last 256 | |
117 | * bytes of SDRAM. | |
118 | */ | |
6d0f6bcf | 119 | bytes_remaining = num_bytes - CONFIG_SYS_MEM_TOP_HIDE; |
b765ffb7 | 120 | |
7e4a0d25 SR |
121 | /* |
122 | * We have to write the ECC bytes by zeroing and flushing in smaller | |
123 | * steps, since the whole 256MByte takes too long for the external | |
124 | * watchdog. | |
125 | */ | |
126 | while (bytes_remaining > 0) { | |
135846d6 SR |
127 | size = min((64 << 20), bytes_remaining); |
128 | ||
129 | /* Write zero's to SDRAM */ | |
130 | dcbz_area(current_addr, size); | |
131 | ||
132 | /* Write modified dcache lines back to memory */ | |
133 | clean_dcache_range(current_addr, current_addr + size); | |
134 | ||
7e4a0d25 SR |
135 | current_addr += 64 << 20; |
136 | bytes_remaining -= 64 << 20; | |
137 | WATCHDOG_RESET(); | |
b765ffb7 SR |
138 | } |
139 | ||
140 | sync(); | |
b765ffb7 SR |
141 | wait_ddr_idle(); |
142 | ||
143 | /* Clear error status */ | |
144 | mfsdram(DDR0_00, val); | |
145 | mtsdram(DDR0_00, val | DDR0_00_INT_ACK_ALL); | |
146 | ||
147 | /* Set 'int_mask' parameter to functionnal value */ | |
148 | mfsdram(DDR0_01, val); | |
149 | mtsdram(DDR0_01, ((val &~ DDR0_01_INT_MASK_MASK) | DDR0_01_INT_MASK_ALL_OFF)); | |
150 | ||
151 | sync(); | |
b765ffb7 SR |
152 | wait_ddr_idle(); |
153 | } | |
154 | #endif | |
155 | ||
b765ffb7 SR |
156 | /************************************************************************* |
157 | * | |
158 | * initdram -- 440EPx's DDR controller is a DENALI Core | |
159 | * | |
160 | ************************************************************************/ | |
9973e3c6 | 161 | phys_size_t initdram (int board_type) |
b765ffb7 | 162 | { |
f47b048b | 163 | #if defined(CONFIG_SPL_BUILD) || !defined(CONFIG_LCD4_LWMON5) |
04e6c38b SR |
164 | /* CL=4 */ |
165 | mtsdram(DDR0_02, 0x00000000); | |
166 | ||
167 | mtsdram(DDR0_00, 0x0000190A); | |
168 | mtsdram(DDR0_01, 0x01000000); | |
169 | mtsdram(DDR0_03, 0x02040803); /* A suitable burst length was taken. CAS is right for our board */ | |
170 | ||
171 | mtsdram(DDR0_04, 0x0B030300); | |
172 | mtsdram(DDR0_05, 0x02020308); | |
173 | mtsdram(DDR0_06, 0x0003C812); | |
174 | mtsdram(DDR0_07, 0x00090100); | |
175 | mtsdram(DDR0_08, 0x03c80001); | |
176 | mtsdram(DDR0_09, 0x00011D5F); | |
0b2f38fe | 177 | mtsdram(DDR0_10, 0x00000100); |
04e6c38b SR |
178 | mtsdram(DDR0_11, 0x000CC800); |
179 | mtsdram(DDR0_12, 0x00000003); | |
180 | mtsdram(DDR0_14, 0x00000000); | |
181 | mtsdram(DDR0_17, 0x1e000000); | |
182 | mtsdram(DDR0_18, 0x1e1e1e1e); | |
183 | mtsdram(DDR0_19, 0x1e1e1e1e); | |
184 | mtsdram(DDR0_20, 0x0B0B0B0B); | |
185 | mtsdram(DDR0_21, 0x0B0B0B0B); | |
186 | #ifdef CONFIG_DDR_ECC | |
187 | mtsdram(DDR0_22, 0x00267F0B | DDR0_22_CTRL_RAW_ECC_ENABLE); /* enable ECC */ | |
188 | #else | |
189 | mtsdram(DDR0_22, 0x00267F0B); | |
190 | #endif | |
191 | ||
192 | mtsdram(DDR0_23, 0x01000000); | |
193 | mtsdram(DDR0_24, 0x01010001); | |
194 | ||
195 | mtsdram(DDR0_26, 0x2D93028A); | |
196 | mtsdram(DDR0_27, 0x0784682B); | |
197 | ||
198 | mtsdram(DDR0_28, 0x00000080); | |
199 | mtsdram(DDR0_31, 0x00000000); | |
200 | mtsdram(DDR0_42, 0x01000008); | |
201 | ||
202 | mtsdram(DDR0_43, 0x050A0200); | |
203 | mtsdram(DDR0_44, 0x00000005); | |
204 | mtsdram(DDR0_02, 0x00000001); /* Activate the denali core */ | |
b765ffb7 | 205 | |
ef16fccf LJ |
206 | denali_wait_for_dlllock(); |
207 | ||
208 | #if defined(CONFIG_DDR_DATA_EYE) | |
209 | /* -----------------------------------------------------------+ | |
210 | * Perform data eye search if requested. | |
211 | * ----------------------------------------------------------*/ | |
6d0f6bcf | 212 | program_tlb(0, CONFIG_SYS_SDRAM_BASE, CONFIG_SYS_MBYTES_SDRAM << 20, |
ef16fccf LJ |
213 | TLB_WORD2_I_ENABLE); |
214 | denali_core_search_data_eye(); | |
6d0f6bcf | 215 | remove_tlb(CONFIG_SYS_SDRAM_BASE, CONFIG_SYS_MBYTES_SDRAM << 20); |
ef16fccf | 216 | #endif |
b765ffb7 | 217 | |
83b4cfa3 | 218 | /* |
b765ffb7 SR |
219 | * Program tlb entries for this size (dynamic) |
220 | */ | |
6d0f6bcf | 221 | program_tlb(0, CONFIG_SYS_SDRAM_BASE, CONFIG_SYS_MBYTES_SDRAM << 20, |
ef16fccf | 222 | MY_TLB_WORD2_I_ENABLE); |
b765ffb7 | 223 | |
a321148b SR |
224 | #if defined(CONFIG_DDR_ECC) |
225 | #if defined(CONFIG_4xx_DCACHE) | |
226 | /* | |
227 | * If ECC is enabled, initialize the parity bits. | |
228 | */ | |
229 | program_ecc(0, CONFIG_SYS_MBYTES_SDRAM << 20, 0); | |
230 | #else /* CONFIG_4xx_DCACHE */ | |
b765ffb7 SR |
231 | /* |
232 | * Setup 2nd TLB with same physical address but different virtual address | |
233 | * with cache enabled. This is done for fast ECC generation. | |
234 | */ | |
6d0f6bcf | 235 | program_tlb(0, CONFIG_SYS_DDR_CACHED_ADDR, CONFIG_SYS_MBYTES_SDRAM << 20, 0); |
b765ffb7 | 236 | |
b765ffb7 SR |
237 | /* |
238 | * If ECC is enabled, initialize the parity bits. | |
239 | */ | |
6d0f6bcf | 240 | program_ecc(CONFIG_SYS_DDR_CACHED_ADDR, CONFIG_SYS_MBYTES_SDRAM << 20, 0); |
a321148b SR |
241 | |
242 | /* | |
243 | * Now after initialization (auto-calibration and ECC generation) | |
244 | * remove the TLB entries with caches enabled and program again with | |
245 | * desired cache functionality | |
246 | */ | |
247 | remove_tlb(CONFIG_SYS_DDR_CACHED_ADDR, CONFIG_SYS_MBYTES_SDRAM << 20); | |
248 | #endif /* CONFIG_4xx_DCACHE */ | |
249 | #endif /* CONFIG_DDR_ECC */ | |
b765ffb7 | 250 | |
ea9f6bce SR |
251 | /* |
252 | * Clear possible errors resulting from data-eye-search. | |
253 | * If not done, then we could get an interrupt later on when | |
254 | * exceptions are enabled. | |
255 | */ | |
256 | set_mcsr(get_mcsr()); | |
f47b048b | 257 | #endif /* CONFIG_SPL_BUILD */ |
ea9f6bce | 258 | |
6d0f6bcf | 259 | return (CONFIG_SYS_MBYTES_SDRAM << 20); |
b765ffb7 | 260 | } |