3 * Stefan Roese, DENX Software Engineering, sr@denx.de.
5 * See file CREDITS for list of people who contributed to this
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.
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.
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,
25 #include <asm/processor.h>
26 #include <asm/immap_85xx.h>
27 #include <asm/processor.h>
34 unsigned long refresh;
35 #endif /* CONFIG_TQM8548 */
38 typedef struct sdram_conf_s sdram_conf_t;
41 #ifdef CONFIG_TQM8548_AG
42 sdram_conf_t ddr_cs_conf[] = {
43 {(1024 << 20), 0x80044202, 0x0002D000}, /* 1024MB, 14x10(4) */
44 { (512 << 20), 0x80044102, 0x0001A000}, /* 512MB, 13x10(4) */
45 { (256 << 20), 0x80040102, 0x00014000}, /* 256MB, 13x10(4) */
46 { (128 << 20), 0x80040101, 0x0000C000}, /* 128MB, 13x9(4) */
48 #else /* !CONFIG_TQM8548_AG */
49 sdram_conf_t ddr_cs_conf[] = {
50 {(512 << 20), 0x80044102, 0x0001A000}, /* 512MB, 13x10(4) */
51 {(256 << 20), 0x80040102, 0x00014000}, /* 256MB, 13x10(4) */
52 {(128 << 20), 0x80040101, 0x0000C000}, /* 128MB, 13x9(4) */
54 #endif /* CONFIG_TQM8548_AG */
55 #else /* !CONFIG_TQM8548 */
56 sdram_conf_t ddr_cs_conf[] = {
57 {(512 << 20), 0x80000202}, /* 512MB, 14x10(4) */
58 {(256 << 20), 0x80000102}, /* 256MB, 13x10(4) */
59 {(128 << 20), 0x80000101}, /* 128MB, 13x9(4) */
60 {( 64 << 20), 0x80000001}, /* 64MB, 12x9(4) */
62 #endif /* CONFIG_TQM8548 */
64 #define N_DDR_CS_CONF (sizeof(ddr_cs_conf) / sizeof(ddr_cs_conf[0]))
66 int cas_latency (void);
69 * Autodetect onboard DDR SDRAM on 85xx platforms
71 * NOTE: Some of the hardcoded values are hardware dependant,
72 * so this should be extended for other future boards
75 long int sdram_setup (int casl)
78 volatile ccsr_ddr_t *ddr = (void *)(CONFIG_SYS_MPC85xx_DDR_ADDR);
80 volatile ccsr_gur_t *gur = (void *)(CONFIG_SYS_MPC85xx_GUTS_ADDR);
81 #else /* !CONFIG_TQM8548 */
82 unsigned long cfg_ddr_timing1;
83 unsigned long cfg_ddr_mode;
84 #endif /* CONFIG_TQM8548 */
87 * Disable memory controller.
93 /* Timing and refresh settings for DDR2-533 and below */
95 ddr->cs0_bnds = (ddr_cs_conf[0].size - 1) >> 24;
96 ddr->cs0_config = ddr_cs_conf[0].reg;
97 ddr->timing_cfg_3 = 0x00020000;
99 /* TIMING CFG 1, 533MHz
101 * ACTTOPRE: 12 Clocks
104 * REFREC: EXT_REFREC:REFREC 53 Clocks
109 ddr->timing_cfg_1 = 0x4C47D432;
111 /* TIMING CFG 2, 533MHz
115 * RD_TO_PRE: 2 Clocks
116 * WR_DATA_DELAY: 1/2 Clock
118 * FOUR_ACT: 14 Clocks
120 ddr->timing_cfg_2 = 0x331848CE;
122 /* DDR SDRAM Mode, 533MHz
123 * MRS: Extended Mode Register
124 * OUT: Outputs enabled
129 * Posted CAS: 3 Clocks
130 * ODS: reduced strength
137 * CAS latency: 4 Clocks
141 ddr->sdram_mode = 0x439E0642;
143 /* DDR SDRAM Interval, 533MHz
144 * REFINT: 1040 Clocks
147 ddr->sdram_interval = (1040 << 16) | 0x100;
150 * workaround for erratum DD10 of MPC8458 family below rev. 2.0:
151 * DDR IO receiver must be set to an acceptable bias point by modifying
154 if (SVR_REV (get_svr ()) < 0x20) {
155 gur->ddrioovcr = 0x90000000; /* enable, VSEL 1.8V */
159 * FRC_SR: normal mode
160 * SR_IE: no self-refresh interrupt
161 * DLL_RST_DIS: don't care, leave at reset value
162 * DQS_CFG: differential DQS signals
163 * ODT_CFG: assert ODT to internal IOs only during reads to DRAM
164 * LVWx_CFG: don't care, leave at reset value
165 * NUM_PR: 1 refresh will be issued at a time
166 * DM_CFG: don't care, leave at reset value
167 * D_INIT: no data initialization
169 ddr->sdram_cfg_2 = 0x04401000;
172 * MRS: Extended Mode Register 2
174 ddr->sdram_mode_2 = 0x8000C000;
176 /* DDR SDRAM CLK CNTL
177 * CLK_ADJUST: 1/2 Clock 0x02000000
178 * CLK_ADJUST: 5/8 Clock 0x02800000
180 ddr->sdram_clk_cntl = 0x02800000;
182 /* wait for clock stabilization */
183 asm ("sync;isync;msync");
186 /* DDR SDRAM CLK CNTL
188 * SREN: don't care, leave at reset value
189 * ECC_EN: no error report
190 * RD_EN: no register DIMMs
192 * DYN_PWR: no power management
193 * 32_BE: don't care, leave at reset value
195 * NCAP: don't care, leave at reset value
197 * BA_INTLV_CTL: no interleaving
198 * x32_EN: x16 organization
199 * PCHB8: MA[10] for auto-precharge
200 * HSE: half strength for single and 2-layer stacks
201 * (full strength for 3- and 4-layer stacks no yet considered)
203 * BI: automatic initialization
205 ddr->sdram_cfg = 0x83000008;
206 asm ("sync; isync; msync");
209 #else /* !CONFIG_TQM8548 */
212 cfg_ddr_timing1 = 0x47405331 | (3 << 16);
213 cfg_ddr_mode = 0x40020002 | (2 << 4);
217 cfg_ddr_timing1 = 0x47405331 | (4 << 16);
218 cfg_ddr_mode = 0x40020002 | (6 << 4);
223 cfg_ddr_timing1 = 0x47405331 | (5 << 16);
224 cfg_ddr_mode = 0x40020002 | (3 << 4);
228 ddr->cs0_bnds = (ddr_cs_conf[0].size - 1) >> 24;
229 ddr->cs0_config = ddr_cs_conf[0].reg;
230 ddr->timing_cfg_1 = cfg_ddr_timing1;
231 ddr->timing_cfg_2 = 0x00000800; /* P9-45,may need tuning */
232 ddr->sdram_mode = cfg_ddr_mode;
233 ddr->sdram_interval = 0x05160100; /* autocharge,no open page */
234 ddr->err_disable = 0x0000000D;
236 asm ("sync; isync; msync");
239 ddr->sdram_cfg = 0xc2000000; /* unbuffered,no DYN_PWR */
240 asm ("sync; isync; msync");
242 #endif /* CONFIG_TQM8548 */
244 for (i = 0; i < N_DDR_CS_CONF; i++) {
245 ddr->cs0_config = ddr_cs_conf[i].reg;
247 if (get_ram_size (0, ddr_cs_conf[i].size) ==
248 ddr_cs_conf[i].size) {
250 * size detected -> set Chip Select Bounds Register
252 ddr->cs0_bnds = (ddr_cs_conf[i].size - 1) >> 24;
258 #ifdef CONFIG_TQM8548
259 if (i < N_DDR_CS_CONF) {
260 /* Adjust refresh rate for DDR2 */
262 ddr->timing_cfg_3 = ddr_cs_conf[i].refresh & 0x00070000;
264 ddr->timing_cfg_1 = (ddr->timing_cfg_1 & 0xFFFF0FFF) |
265 (ddr_cs_conf[i].refresh & 0x0000F000);
267 return ddr_cs_conf[i].size;
269 #endif /* CONFIG_TQM8548 */
271 /* return size if detected, else return 0 */
272 return (i < N_DDR_CS_CONF) ? ddr_cs_conf[i].size : 0;
275 void board_add_ram_info (int use_default)
280 casl = CONFIG_DDR_DEFAULT_CL;
282 casl = cas_latency ();
300 phys_size_t initdram (int board_type)
305 #if defined(CONFIG_DDR_DLL)
307 * This DLL-Override only used on TQM8540 and TQM8560
310 volatile ccsr_gur_t *gur = (void *)(CONFIG_SYS_MPC85xx_GUTS_ADDR);
316 * Work around to stabilize DDR DLL
318 gur->ddrdllcr = 0x81000000;
319 asm ("sync; isync; msync");
321 while (gur->ddrdllcr != 0x81000100) {
322 gur->devdisr = gur->devdisr | 0x00010000;
323 asm ("sync; isync; msync");
324 for (i = 0; i < x; i++)
326 gur->devdisr = gur->devdisr & 0xfff7ffff;
327 asm ("sync; isync; msync");
333 casl = cas_latency ();
334 dram_size = sdram_setup (casl);
335 if ((dram_size == 0) && (casl != CONFIG_DDR_DEFAULT_CL)) {
337 * Try again with default CAS latency
339 puts ("Problem with CAS lantency");
340 board_add_ram_info (1);
341 puts (", using default CL!\n");
342 casl = CONFIG_DDR_DEFAULT_CL;
343 dram_size = sdram_setup (casl);
350 #if defined(CONFIG_SYS_DRAM_TEST)
353 uint *pstart = (uint *) CONFIG_SYS_MEMTEST_START;
354 uint *pend = (uint *) CONFIG_SYS_MEMTEST_END;
357 printf ("SDRAM test phase 1:\n");
358 for (p = pstart; p < pend; p++)
361 for (p = pstart; p < pend; p++) {
362 if (*p != 0xaaaaaaaa) {
363 printf ("SDRAM test fails at: %08x\n", (uint) p);
368 printf ("SDRAM test phase 2:\n");
369 for (p = pstart; p < pend; p++)
372 for (p = pstart; p < pend; p++) {
373 if (*p != 0x55555555) {
374 printf ("SDRAM test fails at: %08x\n", (uint) p);
379 printf ("SDRAM test passed.\n");