3 * Sylvie Gohl, AMCC/IBM, gohl.sylvie@fr.ibm.com
4 * Jacqueline Pira-Ferriol, AMCC/IBM, jpira-ferriol@fr.ibm.com
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
9 * (C) Copyright 2007-2013
10 * Stefan Roese, DENX Software Engineering, sr@denx.de.
12 * SPDX-License-Identifier: GPL-2.0+
15 /* define DEBUG for debugging output (obviously ;-)) */
21 #include <asm/processor.h>
24 #include <asm/cache.h>
25 #include <asm/ppc440.h>
28 DECLARE_GLOBAL_DATA_PTR;
31 * This DDR2 setup code can dynamically setup the TLB entries for the DDR2 memory
32 * region. Right now the cache should still be disabled in U-Boot because of the
33 * EMAC driver, that need it's buffer descriptor to be located in non cached
36 * If at some time this restriction doesn't apply anymore, just define
37 * CONFIG_4xx_DCACHE in the board config file and this code should setup
38 * everything correctly.
40 #ifdef CONFIG_4xx_DCACHE
41 #define MY_TLB_WORD2_I_ENABLE 0 /* enable caching on SDRAM */
43 #define MY_TLB_WORD2_I_ENABLE TLB_WORD2_I_ENABLE /* disable caching on SDRAM */
46 /*-----------------------------------------------------------------------------+
48 *-----------------------------------------------------------------------------*/
49 extern int denali_wait_for_dlllock(void);
50 extern void denali_core_search_data_eye(void);
51 extern void dcbz_area(u32 start_address, u32 num_bytes);
53 static u32 is_ecc_enabled(void)
57 mfsdram(DDR0_22, val);
58 val &= DDR0_22_CTRL_RAW_MASK;
65 void board_add_ram_info(int use_default)
67 PPC4xx_SYS_INFO board_cfg;
75 get_sys_info(&board_cfg);
76 printf(" enabled, %ld MHz", (board_cfg.freqPLB * 2) / 1000000);
78 mfsdram(DDR0_03, val);
79 val = DDR0_03_CASLAT_DECODE(val);
80 printf(", CL%d)", val);
84 static void wait_ddr_idle(void)
87 * Controller idle status cannot be determined for Denali
88 * DDR2 code. Just return here.
92 static void program_ecc(u32 start_address,
94 u32 tlb_word2_i_value)
97 u32 current_addr = start_address;
105 * Because of 440EPx errata CHIP 11, we don't touch the last 256
108 bytes_remaining = num_bytes - CONFIG_SYS_MEM_TOP_HIDE;
111 * We have to write the ECC bytes by zeroing and flushing in smaller
112 * steps, since the whole 256MByte takes too long for the external
115 while (bytes_remaining > 0) {
116 size = min((64 << 20), bytes_remaining);
118 /* Write zero's to SDRAM */
119 dcbz_area(current_addr, size);
121 /* Write modified dcache lines back to memory */
122 clean_dcache_range(current_addr, current_addr + size);
124 current_addr += 64 << 20;
125 bytes_remaining -= 64 << 20;
132 /* Clear error status */
133 mfsdram(DDR0_00, val);
134 mtsdram(DDR0_00, val | DDR0_00_INT_ACK_ALL);
136 /* Set 'int_mask' parameter to functionnal value */
137 mfsdram(DDR0_01, val);
138 mtsdram(DDR0_01, ((val &~ DDR0_01_INT_MASK_MASK) | DDR0_01_INT_MASK_ALL_OFF));
145 /*************************************************************************
147 * initdram -- 440EPx's DDR controller is a DENALI Core
149 ************************************************************************/
153 mtsdram(DDR0_02, 0x00000000);
155 mtsdram(DDR0_00, 0x0000190A);
156 mtsdram(DDR0_01, 0x01000000);
157 mtsdram(DDR0_03, 0x02040803); /* A suitable burst length was taken. CAS is right for our board */
159 mtsdram(DDR0_04, 0x0B030300);
160 mtsdram(DDR0_05, 0x02020308);
161 mtsdram(DDR0_06, 0x0003C812);
162 mtsdram(DDR0_07, 0x00090100);
163 mtsdram(DDR0_08, 0x03c80001);
164 mtsdram(DDR0_09, 0x00011D5F);
165 mtsdram(DDR0_10, 0x00000100);
166 mtsdram(DDR0_11, 0x000CC800);
167 mtsdram(DDR0_12, 0x00000003);
168 mtsdram(DDR0_14, 0x00000000);
169 mtsdram(DDR0_17, 0x1e000000);
170 mtsdram(DDR0_18, 0x1e1e1e1e);
171 mtsdram(DDR0_19, 0x1e1e1e1e);
172 mtsdram(DDR0_20, 0x0B0B0B0B);
173 mtsdram(DDR0_21, 0x0B0B0B0B);
174 #ifdef CONFIG_DDR_ECC
175 mtsdram(DDR0_22, 0x00267F0B | DDR0_22_CTRL_RAW_ECC_ENABLE); /* enable ECC */
177 mtsdram(DDR0_22, 0x00267F0B);
180 mtsdram(DDR0_23, 0x01000000);
181 mtsdram(DDR0_24, 0x01010001);
183 mtsdram(DDR0_26, 0x2D93028A);
184 mtsdram(DDR0_27, 0x0784682B);
186 mtsdram(DDR0_28, 0x00000080);
187 mtsdram(DDR0_31, 0x00000000);
188 mtsdram(DDR0_42, 0x01000008);
190 mtsdram(DDR0_43, 0x050A0200);
191 mtsdram(DDR0_44, 0x00000005);
192 mtsdram(DDR0_02, 0x00000001); /* Activate the denali core */
194 denali_wait_for_dlllock();
196 #if defined(CONFIG_DDR_DATA_EYE)
197 /* -----------------------------------------------------------+
198 * Perform data eye search if requested.
199 * ----------------------------------------------------------*/
200 program_tlb(0, CONFIG_SYS_SDRAM_BASE, CONFIG_SYS_MBYTES_SDRAM << 20,
202 denali_core_search_data_eye();
203 remove_tlb(CONFIG_SYS_SDRAM_BASE, CONFIG_SYS_MBYTES_SDRAM << 20);
207 * Program tlb entries for this size (dynamic)
209 program_tlb(0, CONFIG_SYS_SDRAM_BASE, CONFIG_SYS_MBYTES_SDRAM << 20,
210 MY_TLB_WORD2_I_ENABLE);
212 #if defined(CONFIG_DDR_ECC)
213 #if defined(CONFIG_4xx_DCACHE)
215 * If ECC is enabled, initialize the parity bits.
217 program_ecc(0, CONFIG_SYS_MBYTES_SDRAM << 20, 0);
218 #else /* CONFIG_4xx_DCACHE */
220 * Setup 2nd TLB with same physical address but different virtual address
221 * with cache enabled. This is done for fast ECC generation.
223 program_tlb(0, CONFIG_SYS_DDR_CACHED_ADDR, CONFIG_SYS_MBYTES_SDRAM << 20, 0);
226 * If ECC is enabled, initialize the parity bits.
228 program_ecc(CONFIG_SYS_DDR_CACHED_ADDR, CONFIG_SYS_MBYTES_SDRAM << 20, 0);
231 * Now after initialization (auto-calibration and ECC generation)
232 * remove the TLB entries with caches enabled and program again with
233 * desired cache functionality
235 remove_tlb(CONFIG_SYS_DDR_CACHED_ADDR, CONFIG_SYS_MBYTES_SDRAM << 20);
236 #endif /* CONFIG_4xx_DCACHE */
237 #endif /* CONFIG_DDR_ECC */
240 * Clear possible errors resulting from data-eye-search.
241 * If not done, then we could get an interrupt later on when
242 * exceptions are enabled.
244 set_mcsr(get_mcsr());
246 gd->ram_size = CONFIG_SYS_MBYTES_SDRAM << 20;