3 * Niklaus Giger (Niklaus.Giger@netstal.com)
5 * Sylvie Gohl, AMCC/IBM, gohl.sylvie@fr.ibm.com
6 * Jacqueline Pira-Ferriol, AMCC/IBM, jpira-ferriol@fr.ibm.com
7 * Thierry Roman, AMCC/IBM, thierry_roman@fr.ibm.com
8 * Alain Saurel, AMCC/IBM, alain.saurel@fr.ibm.com
9 * Robert Snyder, AMCC/IBM, rob.snyder@fr.ibm.com
12 * Stefan Roese, DENX Software Engineering, sr@denx.de.
14 * This program is free software; you can redistribute it and/or
15 * modify it under the terms of the GNU General Public License as
16 * published by the Free Software Foundation; either version 2 of
17 * the License, or (at your option) any later version.
19 * This program is distributed in the hope that it will be useful,
20 * but WITHOUT ANY WARRANTY; without even the implied warranty of
21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 * GNU General Public License for more details.
24 * You should have received a copy of the GNU General Public License
25 * along with this program; if not, write to the Free Software
26 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
30 /* define DEBUG for debug output */
34 #include <asm/processor.h>
39 void hcu_led_set(u32 value);
40 void dcbz_area(u32 start_address, u32 num_bytes);
43 #define DDR_DCR_BASE 0x10
44 #define ddrcfga (DDR_DCR_BASE+0x0) /* DDR configuration address reg */
45 #define ddrcfgd (DDR_DCR_BASE+0x1) /* DDR configuration data reg */
47 #define DDR0_01_INT_MASK_MASK 0x000000FF
48 #define DDR0_00_INT_ACK_ALL 0x7F000000
49 #define DDR0_01_INT_MASK_ALL_ON 0x000000FF
50 #define DDR0_01_INT_MASK_ALL_OFF 0x00000000
52 #define DDR0_17_DLLLOCKREG_MASK 0x00010000 /* Read only */
53 #define DDR0_17_DLLLOCKREG_UNLOCKED 0x00000000
54 #define DDR0_17_DLLLOCKREG_LOCKED 0x00010000
58 #define DDR0_22_CTRL_RAW_MASK 0x03000000
59 #define DDR0_22_CTRL_RAW_ECC_DISABLE 0x00000000 /* ECC not enabled */
60 #define DDR0_22_CTRL_RAW_ECC_CHECK_ONLY 0x01000000 /* ECC no correction */
61 #define DDR0_22_CTRL_RAW_NO_ECC_RAM 0x02000000 /* Not a ECC RAM*/
62 #define DDR0_22_CTRL_RAW_ECC_ENABLE 0x03000000 /* ECC correcting on */
63 #define DDR0_03_CASLAT_DECODE(n) ((((unsigned long)(n))>>16)&0x7)
65 #ifdef CFG_ENABLE_SDRAM_CACHE
66 #define MY_TLB_WORD2_I_ENABLE 0 /* enable caching on DDR2 */
68 #define MY_TLB_WORD2_I_ENABLE TLB_WORD2_I_ENABLE /* disable caching on DDR2 */
71 void program_tlb(u32 phys_addr, u32 virt_addr, u32 size, u32 tlb_word2_i_value);
73 #ifdef CONFIG_ADD_RAM_INFO
74 void board_add_ram_info(int use_default)
76 PPC440_SYS_INFO board_cfg;
78 mfsdram(DDR0_22, val);
79 val &= DDR0_22_CTRL_RAW_MASK;
81 case DDR0_22_CTRL_RAW_ECC_DISABLE:
82 puts(" (ECC disabled");
84 case DDR0_22_CTRL_RAW_ECC_CHECK_ONLY:
85 puts(" (ECC check only");
87 case DDR0_22_CTRL_RAW_NO_ECC_RAM:
90 case DDR0_22_CTRL_RAW_ECC_ENABLE:
91 puts(" (ECC enabled");
95 get_sys_info(&board_cfg);
96 printf(", %d MHz", (board_cfg.freqPLB * 2) / 1000000);
98 mfsdram(DDR0_03, val);
99 val = DDR0_03_CASLAT_DECODE(val);
100 printf(", CL%d)", val);
104 /*--------------------------------------------------------------------
106 *--------------------------------------------------------------------*/
107 static int wait_for_dlllock(void)
112 /* -----------------------------------------------------------+
113 * Wait for the DCC master delay line to finish calibration
114 * ----------------------------------------------------------*/
115 mtdcr(ddrcfga, DDR0_17);
116 val = DDR0_17_DLLLOCKREG_UNLOCKED;
118 while (wait != 0xffff) {
119 val = mfdcr(ddrcfgd);
120 if ((val & DDR0_17_DLLLOCKREG_MASK) ==
121 DDR0_17_DLLLOCKREG_LOCKED)
122 /* dlllockreg bit on */
127 debug("0x%04x: DDR0_17 Value (dlllockreg bit): 0x%08x\n", wait, val);
128 debug("Waiting for dlllockreg bit to raise\n");
133 /***********************************************************************
135 * sdram_panic -- Panic if we cannot configure the sdram correctly
137 ************************************************************************/
138 void sdram_panic(const char *reason)
140 printf("\n%s: reason %s", __FUNCTION__, reason);
147 #ifdef CONFIG_DDR_ECC
148 static void blank_string(int size)
152 for (i=0; i<size; i++)
154 for (i=0; i<size; i++)
156 for (i=0; i<size; i++)
159 /*---------------------------------------------------------------------------+
161 *---------------------------------------------------------------------------*/
162 static void program_ecc(unsigned long start_address, unsigned long num_bytes,
163 unsigned long tlb_word2_i_value)
165 unsigned long current_address= start_address;
169 char str[] = "ECC generation -";
170 char slash[] = "\\|/-\\|/-";
177 if (tlb_word2_i_value == TLB_WORD2_I_ENABLE) {
178 /* ECC bit set method for non-cached memory */
179 /* This takes various seconds */
180 for(current_address = 0; current_address < num_bytes;
181 current_address += sizeof(u32)) {
182 *(u32 *)current_address = 0;
183 if ((current_address % (2 << 20)) == 0) {
185 putc(slash[loopi++ % 8]);
189 /* ECC bit set method for cached memory */
190 /* Fast method, no noticeable delay */
191 dcbz_area(start_address, num_bytes);
194 blank_string(strlen(str));
196 /* Clear error status */
197 mfsdram(DDR0_00, val);
198 mtsdram(DDR0_00, val | DDR0_00_INT_ACK_ALL);
201 * Clear possible errors
202 * If not done, then we could get an interrupt later on when
203 * exceptions are enabled.
205 mtspr(mcsr, mfspr(mcsr));
207 /* Set 'int_mask' parameter to functionnal value */
208 mfsdram(DDR0_01, val);
209 mtsdram(DDR0_01, ((val &~ DDR0_01_INT_MASK_MASK) |
210 DDR0_01_INT_MASK_ALL_OFF));
217 /***********************************************************************
219 * initdram -- 440EPx's DDR controller is a DENALI Core
221 ************************************************************************/
222 long int initdram (int board_type)
224 #define HCU_HW_SDRAM_CONFIG_MASK 0x7
225 #define INVALID_HW_CONFIG "Invalid HW-Config"
226 u16 *hwVersReg = (u16 *) HCU_HW_VERSION_REGISTER;
227 unsigned int dram_size = 0;
229 mtsdram(DDR0_02, 0x00000000);
231 /* Values must be kept in sync with Excel-table <<A0001492.>> ! */
232 mtsdram(DDR0_00, 0x0000190A);
233 mtsdram(DDR0_01, 0x01000000);
234 mtsdram(DDR0_03, 0x02030602);
235 mtsdram(DDR0_04, 0x0A020200);
236 mtsdram(DDR0_05, 0x02020307);
237 switch (*hwVersReg & HCU_HW_SDRAM_CONFIG_MASK) {
239 dram_size = 128 * 1024 * 1024 ;
240 mtsdram(DDR0_06, 0x0102C80D); /* 128MB RAM */
241 mtsdram(DDR0_11, 0x000FC800); /* 128MB RAM */
242 mtsdram(DDR0_43, 0x030A0300); /* 128MB RAM */
245 dram_size = 256 * 1024 * 1024 ;
246 mtsdram(DDR0_06, 0x0102C812); /* 256MB RAM */
247 mtsdram(DDR0_11, 0x0014C800); /* 256MB RAM */
248 mtsdram(DDR0_43, 0x030A0200); /* 256MB RAM */
251 sdram_panic(INVALID_HW_CONFIG);
254 mtsdram(DDR0_07, 0x00090100);
256 * TCPD=200 cycles of clock input is required to lock the DLL.
257 * CKE must be HIGH the entire time.mtsdram(DDR0_08, 0x02C80001);
259 mtsdram(DDR0_08, 0x02C80001);
260 mtsdram(DDR0_09, 0x00011D5F);
261 mtsdram(DDR0_10, 0x00000100);
262 mtsdram(DDR0_12, 0x00000003);
263 mtsdram(DDR0_14, 0x00000000);
264 mtsdram(DDR0_17, 0x1D000000);
265 mtsdram(DDR0_18, 0x1D1D1D1D);
266 mtsdram(DDR0_19, 0x1D1D1D1D);
267 mtsdram(DDR0_20, 0x0B0B0B0B);
268 mtsdram(DDR0_21, 0x0B0B0B0B);
269 #define ECC_RAM 0x03267F0B
270 #define NO_ECC_RAM 0x00267F0B
271 #ifdef CONFIG_DDR_ECC
272 mtsdram(DDR0_22, ECC_RAM);
274 mtsdram(DDR0_22, NO_ECC_RAM);
277 mtsdram(DDR0_23, 0x00000000);
278 mtsdram(DDR0_24, 0x01020001);
279 mtsdram(DDR0_26, 0x2D930517);
280 mtsdram(DDR0_27, 0x00008236);
281 mtsdram(DDR0_28, 0x00000000);
282 mtsdram(DDR0_31, 0x00000000);
283 mtsdram(DDR0_42, 0x01000006);
284 mtsdram(DDR0_44, 0x00000003);
285 mtsdram(DDR0_02, 0x00000001);
287 mtsdram(DDR0_00, 0x40000000); /* Zero init bit */
290 * Program tlb entries for this size (dynamic)
292 remove_tlb(CFG_SDRAM_BASE, 256 << 20);
293 program_tlb(0, 0, dram_size, MY_TLB_WORD2_I_ENABLE);
296 * Setup 2nd TLB with same physical address but different virtual
297 * address with cache enabled. This is done for fast ECC generation.
299 program_tlb(0, CFG_DDR_CACHED_ADDR, dram_size, 0);
301 /* Diminish RAM to initialize */
302 dram_size = dram_size - 32 ;
303 #ifdef CONFIG_DDR_ECC
305 * If ECC is enabled, initialize the parity bits.
307 program_ecc(CFG_DDR_CACHED_ADDR, dram_size, 0);