1 // SPDX-License-Identifier: GPL-2.0+
3 * (C) Copyright 2006-2007 Freescale Semiconductor, Inc.
6 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
8 * Copyright (C) 2004-2006 Freescale Semiconductor, Inc.
9 * (C) Copyright 2003 Motorola Inc.
10 * Xianghua Xiao (X.Xiao@motorola.com)
13 #ifndef CONFIG_MPC83XX_SDRAM
20 #include <asm/processor.h>
25 #include <spd_sdram.h>
26 #include <linux/delay.h>
28 DECLARE_GLOBAL_DATA_PTR;
30 void board_add_ram_info(int use_default)
32 volatile immap_t *immap = (immap_t *) CONFIG_SYS_IMMR;
33 volatile ddr83xx_t *ddr = &immap->ddr;
36 printf(" (DDR%d", ((ddr->sdram_cfg & SDRAM_CFG_SDRAM_TYPE_MASK)
37 >> SDRAM_CFG_SDRAM_TYPE_SHIFT) - 1);
39 #if defined(CONFIG_ARCH_MPC8308) || defined(CONFIG_ARCH_MPC831X)
40 if ((ddr->sdram_cfg & SDRAM_CFG_DBW_MASK) == SDRAM_CFG_DBW_16)
42 else if ((ddr->sdram_cfg & SDRAM_CFG_DBW_MASK) == SDRAM_CFG_DBW_32)
45 puts(", unknown width");
47 if (ddr->sdram_cfg & SDRAM_CFG_32_BE)
53 if (ddr->sdram_cfg & SDRAM_CFG_ECC_EN)
58 printf(", %s MHz)", strmhz(buf, gd->mem_clk));
60 #if defined(CONFIG_SYS_LB_SDRAM) && defined(CONFIG_SYS_LBC_SDRAM_SIZE)
62 print_size (CONFIG_SYS_LBC_SDRAM_SIZE * 1024 * 1024, " (local bus)");
66 #ifdef CONFIG_SPD_EEPROM
67 #ifndef CONFIG_SYS_READ_SPD
68 #define CONFIG_SYS_READ_SPD i2c_read
70 #ifndef SPD_EEPROM_OFFSET
71 #define SPD_EEPROM_OFFSET 0
73 #ifndef SPD_EEPROM_ADDR_LEN
74 #define SPD_EEPROM_ADDR_LEN 1
78 * Convert picoseconds into clock cycles (rounding up if needed).
81 picos_to_clk(int picos)
83 unsigned int mem_bus_clk;
86 mem_bus_clk = gd->mem_clk >> 1;
87 clks = picos / (1000000000 / (mem_bus_clk / 1000));
88 if (picos % (1000000000 / (mem_bus_clk / 1000)) != 0)
94 unsigned int banksize(unsigned char row_dens)
96 return ((row_dens >> 2) | ((row_dens & 3) << 6)) << 24;
99 int read_spd(uint addr)
106 static void spd_debug(spd_eeprom_t *spd)
108 printf ("\nDIMM type: %-18.18s\n", spd->mpart);
109 printf ("SPD size: %d\n", spd->info_size);
110 printf ("EEPROM size: %d\n", 1 << spd->chip_size);
111 printf ("Memory type: %d\n", spd->mem_type);
112 printf ("Row addr: %d\n", spd->nrow_addr);
113 printf ("Column addr: %d\n", spd->ncol_addr);
114 printf ("# of rows: %d\n", spd->nrows);
115 printf ("Row density: %d\n", spd->row_dens);
116 printf ("# of banks: %d\n", spd->nbanks);
117 printf ("Data width: %d\n",
118 256 * spd->dataw_msb + spd->dataw_lsb);
119 printf ("Chip width: %d\n", spd->primw);
120 printf ("Refresh rate: %02X\n", spd->refresh);
121 printf ("CAS latencies: %02X\n", spd->cas_lat);
122 printf ("Write latencies: %02X\n", spd->write_lat);
123 printf ("tRP: %d\n", spd->trp);
124 printf ("tRCD: %d\n", spd->trcd);
127 #endif /* SPD_DEBUG */
131 volatile immap_t *immap = (immap_t *)CONFIG_SYS_IMMR;
132 volatile ddr83xx_t *ddr = &immap->ddr;
133 volatile law83xx_t *ecm = &immap->sysconf.ddrlaw[0];
135 unsigned int n_ranks;
136 unsigned int odt_rd_cfg, odt_wr_cfg;
137 unsigned char twr_clk, twtr_clk;
138 unsigned int sdram_type;
139 unsigned int memsize;
140 unsigned int law_size;
141 unsigned char caslat, caslat_ctrl;
142 unsigned int trfc, trfc_clk, trfc_low;
143 unsigned int trcd_clk, trtp_clk;
144 unsigned char cke_min_clk;
145 unsigned char add_lat, wr_lat;
146 unsigned char wr_data_delay;
147 unsigned char four_act;
149 unsigned char burstlen;
150 unsigned char odt_cfg, mode_odt_enable;
151 unsigned int max_bus_clk;
152 unsigned int max_data_rate, effective_data_rate;
153 unsigned int ddrc_clk;
154 unsigned int refresh_clk;
155 unsigned int sdram_cfg;
156 unsigned int ddrc_ecc_enable;
157 unsigned int pvr = get_pvr();
160 * First disable the memory controller (could be enabled
163 clrsetbits_be32(&ddr->sdram_cfg, SDRAM_CFG_MEM_EN, 0);
167 /* Read SPD parameters with I2C */
168 CONFIG_SYS_READ_SPD(SPD_EEPROM_ADDRESS, SPD_EEPROM_OFFSET,
169 SPD_EEPROM_ADDR_LEN, (uchar *) &spd, sizeof(spd));
173 /* Check the memory type */
174 if (spd.mem_type != SPD_MEMTYPE_DDR && spd.mem_type != SPD_MEMTYPE_DDR2) {
175 debug("DDR: Module mem type is %02X\n", spd.mem_type);
179 /* Check the number of physical bank */
180 if (spd.mem_type == SPD_MEMTYPE_DDR) {
183 n_ranks = (spd.nrows & 0x7) + 1;
187 printf("DDR: The number of physical bank is %02X\n", n_ranks);
191 /* Check if the number of row of the module is in the range of DDRC */
192 if (spd.nrow_addr < 12 || spd.nrow_addr > 15) {
193 printf("DDR: Row number is out of range of DDRC, row=%02X\n",
198 /* Check if the number of col of the module is in the range of DDRC */
199 if (spd.ncol_addr < 8 || spd.ncol_addr > 11) {
200 printf("DDR: Col number is out of range of DDRC, col=%02X\n",
205 #ifdef CONFIG_SYS_DDRCDR_VALUE
207 * Adjust DDR II IO voltage biasing. It just makes it work.
209 if(spd.mem_type == SPD_MEMTYPE_DDR2) {
210 immap->sysconf.ddrcdr = CONFIG_SYS_DDRCDR_VALUE;
216 * ODT configuration recommendation from DDR Controller Chapter.
218 odt_rd_cfg = 0; /* Never assert ODT */
219 odt_wr_cfg = 0; /* Never assert ODT */
220 if (spd.mem_type == SPD_MEMTYPE_DDR2) {
221 odt_wr_cfg = 1; /* Assert ODT on writes to CSn */
224 /* Setup DDR chip select register */
225 #ifdef CONFIG_SYS_83XX_DDR_USES_CS0
226 ddr->csbnds[0].csbnds = (banksize(spd.row_dens) >> 24) - 1;
227 ddr->cs_config[0] = ( 1 << 31
230 | ((spd.nbanks == 8 ? 1 : 0) << 14)
231 | ((spd.nrow_addr - 12) << 8)
232 | (spd.ncol_addr - 8) );
234 debug("cs0_bnds = 0x%08x\n",ddr->csbnds[0].csbnds);
235 debug("cs0_config = 0x%08x\n",ddr->cs_config[0]);
238 ddr->csbnds[1].csbnds = ( (banksize(spd.row_dens) >> 8)
239 | ((banksize(spd.row_dens) >> 23) - 1) );
240 ddr->cs_config[1] = ( 1<<31
243 | ((spd.nbanks == 8 ? 1 : 0) << 14)
244 | ((spd.nrow_addr - 12) << 8)
245 | (spd.ncol_addr - 8) );
246 debug("cs1_bnds = 0x%08x\n",ddr->csbnds[1].csbnds);
247 debug("cs1_config = 0x%08x\n",ddr->cs_config[1]);
251 ddr->csbnds[2].csbnds = (banksize(spd.row_dens) >> 24) - 1;
252 ddr->cs_config[2] = ( 1 << 31
255 | ((spd.nbanks == 8 ? 1 : 0) << 14)
256 | ((spd.nrow_addr - 12) << 8)
257 | (spd.ncol_addr - 8) );
259 debug("cs2_bnds = 0x%08x\n",ddr->csbnds[2].csbnds);
260 debug("cs2_config = 0x%08x\n",ddr->cs_config[2]);
263 ddr->csbnds[3].csbnds = ( (banksize(spd.row_dens) >> 8)
264 | ((banksize(spd.row_dens) >> 23) - 1) );
265 ddr->cs_config[3] = ( 1<<31
268 | ((spd.nbanks == 8 ? 1 : 0) << 14)
269 | ((spd.nrow_addr - 12) << 8)
270 | (spd.ncol_addr - 8) );
271 debug("cs3_bnds = 0x%08x\n",ddr->csbnds[3].csbnds);
272 debug("cs3_config = 0x%08x\n",ddr->cs_config[3]);
277 * Figure out memory size in Megabytes.
279 memsize = n_ranks * banksize(spd.row_dens) / 0x100000;
282 * First supported LAW size is 16M, at LAWAR_SIZE_16M == 23.
284 law_size = 19 + __ilog2(memsize);
287 * Set up LAWBAR for all of DDR.
289 ecm->bar = CONFIG_SYS_SDRAM_BASE & 0xfffff000;
290 ecm->ar = (LAWAR_EN | LAWAR_TRGT_IF_DDR | (LAWAR_SIZE & law_size));
291 debug("DDR:bar=0x%08x\n", ecm->bar);
292 debug("DDR:ar=0x%08x\n", ecm->ar);
295 * Find the largest CAS by locating the highest 1 bit
296 * in the spd.cas_lat field. Translate it to a DDR
297 * controller field value:
299 * CAS Lat DDR I DDR II Ctrl
300 * Clocks SPD Bit SPD Bit Value
301 * ------- ------- ------- -----
312 caslat = __ilog2(spd.cas_lat);
313 if ((spd.mem_type == SPD_MEMTYPE_DDR)
315 printf("DDR I: Invalid SPD CAS Latency: 0x%x.\n", spd.cas_lat);
317 } else if (spd.mem_type == SPD_MEMTYPE_DDR2
318 && (caslat < 2 || caslat > 5)) {
319 printf("DDR II: Invalid SPD CAS Latency: 0x%x.\n",
323 debug("DDR: caslat SPD bit is %d\n", caslat);
325 max_bus_clk = 1000 *10 / (((spd.clk_cycle & 0xF0) >> 4) * 10
326 + (spd.clk_cycle & 0x0f));
327 max_data_rate = max_bus_clk * 2;
329 debug("DDR:Module maximum data rate is: %d MHz\n", max_data_rate);
331 ddrc_clk = gd->mem_clk / 1000000;
332 effective_data_rate = 0;
334 if (max_data_rate >= 460) { /* it is DDR2-800, 667, 533 */
335 if (spd.cas_lat & 0x08)
339 if (ddrc_clk <= 460 && ddrc_clk > 350)
340 effective_data_rate = 400;
341 else if (ddrc_clk <=350 && ddrc_clk > 280)
342 effective_data_rate = 333;
343 else if (ddrc_clk <= 280 && ddrc_clk > 230)
344 effective_data_rate = 266;
346 effective_data_rate = 200;
347 } else if (max_data_rate >= 390 && max_data_rate < 460) { /* it is DDR 400 */
348 if (ddrc_clk <= 460 && ddrc_clk > 350) {
349 /* DDR controller clk at 350~460 */
350 effective_data_rate = 400; /* 5ns */
352 } else if (ddrc_clk <= 350 && ddrc_clk > 280) {
353 /* DDR controller clk at 280~350 */
354 effective_data_rate = 333; /* 6ns */
355 if (spd.clk_cycle2 == 0x60)
359 } else if (ddrc_clk <= 280 && ddrc_clk > 230) {
360 /* DDR controller clk at 230~280 */
361 effective_data_rate = 266; /* 7.5ns */
362 if (spd.clk_cycle3 == 0x75)
364 else if (spd.clk_cycle2 == 0x75)
368 } else if (ddrc_clk <= 230 && ddrc_clk > 90) {
369 /* DDR controller clk at 90~230 */
370 effective_data_rate = 200; /* 10ns */
371 if (spd.clk_cycle3 == 0xa0)
373 else if (spd.clk_cycle2 == 0xa0)
378 } else if (max_data_rate >= 323) { /* it is DDR 333 */
379 if (ddrc_clk <= 350 && ddrc_clk > 280) {
380 /* DDR controller clk at 280~350 */
381 effective_data_rate = 333; /* 6ns */
383 } else if (ddrc_clk <= 280 && ddrc_clk > 230) {
384 /* DDR controller clk at 230~280 */
385 effective_data_rate = 266; /* 7.5ns */
386 if (spd.clk_cycle2 == 0x75)
390 } else if (ddrc_clk <= 230 && ddrc_clk > 90) {
391 /* DDR controller clk at 90~230 */
392 effective_data_rate = 200; /* 10ns */
393 if (spd.clk_cycle3 == 0xa0)
395 else if (spd.clk_cycle2 == 0xa0)
400 } else if (max_data_rate >= 256) { /* it is DDR 266 */
401 if (ddrc_clk <= 350 && ddrc_clk > 280) {
402 /* DDR controller clk at 280~350 */
403 printf("DDR: DDR controller freq is more than "
404 "max data rate of the module\n");
406 } else if (ddrc_clk <= 280 && ddrc_clk > 230) {
407 /* DDR controller clk at 230~280 */
408 effective_data_rate = 266; /* 7.5ns */
410 } else if (ddrc_clk <= 230 && ddrc_clk > 90) {
411 /* DDR controller clk at 90~230 */
412 effective_data_rate = 200; /* 10ns */
413 if (spd.clk_cycle2 == 0xa0)
416 } else if (max_data_rate >= 190) { /* it is DDR 200 */
417 if (ddrc_clk <= 350 && ddrc_clk > 230) {
418 /* DDR controller clk at 230~350 */
419 printf("DDR: DDR controller freq is more than "
420 "max data rate of the module\n");
422 } else if (ddrc_clk <= 230 && ddrc_clk > 90) {
423 /* DDR controller clk at 90~230 */
424 effective_data_rate = 200; /* 10ns */
429 debug("DDR:Effective data rate is: %dMHz\n", effective_data_rate);
430 debug("DDR:The MSB 1 of CAS Latency is: %d\n", caslat);
433 * Errata DDR6 work around: input enable 2 cycles earlier.
434 * including MPC834X Rev1.0/1.1 and MPC8360 Rev1.1/1.2.
436 if(PVR_MAJ(pvr) <= 1 && spd.mem_type == SPD_MEMTYPE_DDR){
438 ddr->debug_reg = 0x201c0000; /* CL=2 */
439 else if (caslat == 3)
440 ddr->debug_reg = 0x202c0000; /* CL=2.5 */
441 else if (caslat == 4)
442 ddr->debug_reg = 0x202c0000; /* CL=3.0 */
446 debug("Errata DDR6 (debug_reg=0x%08x)\n", ddr->debug_reg);
450 * Convert caslat clocks to DDR controller value.
451 * Force caslat_ctrl to be DDR Controller field-sized.
453 if (spd.mem_type == SPD_MEMTYPE_DDR) {
454 caslat_ctrl = (caslat + 1) & 0x07;
456 caslat_ctrl = (2 * caslat - 1) & 0x0f;
459 debug("DDR: effective data rate is %d MHz\n", effective_data_rate);
460 debug("DDR: caslat SPD bit is %d, controller field is 0x%x\n",
461 caslat, caslat_ctrl);
465 * Avoid writing for DDR I.
467 if (spd.mem_type == SPD_MEMTYPE_DDR2) {
468 unsigned char taxpd_clk = 8; /* By the book. */
469 unsigned char tmrd_clk = 2; /* By the book. */
470 unsigned char act_pd_exit = 2; /* Empirical? */
471 unsigned char pre_pd_exit = 6; /* Empirical? */
473 ddr->timing_cfg_0 = (0
474 | ((act_pd_exit & 0x7) << 20) /* ACT_PD_EXIT */
475 | ((pre_pd_exit & 0x7) << 16) /* PRE_PD_EXIT */
476 | ((taxpd_clk & 0xf) << 8) /* ODT_PD_EXIT */
477 | ((tmrd_clk & 0xf) << 0) /* MRS_CYC */
479 debug("DDR: timing_cfg_0 = 0x%08x\n", ddr->timing_cfg_0);
483 * For DDR I, WRREC(Twr) and WRTORD(Twtr) are not in SPD,
484 * use conservative value.
485 * For DDR II, they are bytes 36 and 37, in quarter nanos.
488 if (spd.mem_type == SPD_MEMTYPE_DDR) {
489 twr_clk = 3; /* Clocks */
490 twtr_clk = 1; /* Clocks */
492 twr_clk = picos_to_clk(spd.twr * 250);
493 twtr_clk = picos_to_clk(spd.twtr * 250);
499 * Calculate Trfc, in picos.
500 * DDR I: Byte 42 straight up in ns.
501 * DDR II: Byte 40 and 42 swizzled some, in ns.
503 if (spd.mem_type == SPD_MEMTYPE_DDR) {
504 trfc = spd.trfc * 1000; /* up to ps */
506 unsigned int byte40_table_ps[8] = {
517 trfc = (((spd.trctrfc_ext & 0x1) * 256) + spd.trfc) * 1000
518 + byte40_table_ps[(spd.trctrfc_ext >> 1) & 0x7];
520 trfc_clk = picos_to_clk(trfc);
523 * Trcd, Byte 29, from quarter nanos to ps and clocks.
525 trcd_clk = picos_to_clk(spd.trcd * 250) & 0x7;
528 * Convert trfc_clk to DDR controller fields. DDR I should
529 * fit in the REFREC field (16-19) of TIMING_CFG_1, but the
530 * 83xx controller has an extended REFREC field of three bits.
531 * The controller automatically adds 8 clocks to this value,
532 * so preadjust it down 8 first before splitting it up.
534 trfc_low = (trfc_clk - 8) & 0xf;
537 (((picos_to_clk(spd.trp * 250) & 0x07) << 28 ) | /* PRETOACT */
538 ((picos_to_clk(spd.tras * 1000) & 0x0f ) << 24 ) | /* ACTTOPRE */
539 (trcd_clk << 20 ) | /* ACTTORW */
540 (caslat_ctrl << 16 ) | /* CASLAT */
541 (trfc_low << 12 ) | /* REFEC */
542 ((twr_clk & 0x07) << 8) | /* WRRREC */
543 ((picos_to_clk(spd.trrd * 250) & 0x07) << 4) | /* ACTTOACT */
544 ((twtr_clk & 0x07) << 0) /* WRTORD */
550 * For DDR II, with ODT enabled, use "a value" less than ACTTORW,
551 * which comes from Trcd, and also note that:
552 * add_lat + caslat must be >= 4
555 if (spd.mem_type == SPD_MEMTYPE_DDR2
556 && (odt_wr_cfg || odt_rd_cfg)
558 add_lat = 4 - caslat;
559 if ((add_lat + caslat) < 4) {
566 * Historically 0x2 == 4/8 clock delay.
567 * Empirically, 0x3 == 6/8 clock delay is suggested for DDR I 266.
570 #ifdef CONFIG_SYS_DDR_WRITE_DATA_DELAY
571 wr_data_delay = CONFIG_SYS_DDR_WRITE_DATA_DELAY;
577 * Minimum CKE Pulse Width.
578 * Four Activate Window
580 if (spd.mem_type == SPD_MEMTYPE_DDR) {
582 * This is a lie. It should really be 1, but if it is
583 * set to 1, bits overlap into the old controller's
584 * otherwise unused ACSM field. If we leave it 0, then
585 * the HW will magically treat it as 1 for DDR 1. Oh Yea.
589 trtp_clk = 2; /* By the book. */
590 cke_min_clk = 1; /* By the book. */
591 four_act = 1; /* By the book. */
596 /* Convert SPD value from quarter nanos to picos. */
597 trtp_clk = picos_to_clk(spd.trtp * 250);
602 cke_min_clk = 3; /* By the book. */
603 four_act = picos_to_clk(37500); /* By the book. 1k pages? */
607 * Empirically set ~MCAS-to-preamble override for DDR 2.
608 * Your mileage will vary.
611 if (spd.mem_type == SPD_MEMTYPE_DDR2) {
612 #ifdef CONFIG_SYS_DDR_CPO
613 cpo = CONFIG_SYS_DDR_CPO;
615 if (effective_data_rate == 266) {
616 cpo = 0x4; /* READ_LAT + 1/2 */
617 } else if (effective_data_rate == 333) {
618 cpo = 0x6; /* READ_LAT + 1 */
619 } else if (effective_data_rate == 400) {
620 cpo = 0x7; /* READ_LAT + 5/4 */
622 /* Automatic calibration */
628 ddr->timing_cfg_2 = (0
629 | ((add_lat & 0x7) << 28) /* ADD_LAT */
630 | ((cpo & 0x1f) << 23) /* CPO */
631 | ((wr_lat & 0x7) << 19) /* WR_LAT */
632 | ((trtp_clk & 0x7) << 13) /* RD_TO_PRE */
633 | ((wr_data_delay & 0x7) << 10) /* WR_DATA_DELAY */
634 | ((cke_min_clk & 0x7) << 6) /* CKE_PLS */
635 | ((four_act & 0x1f) << 0) /* FOUR_ACT */
638 debug("DDR:timing_cfg_1=0x%08x\n", ddr->timing_cfg_1);
639 debug("DDR:timing_cfg_2=0x%08x\n", ddr->timing_cfg_2);
641 /* Check DIMM data bus width */
642 if (spd.dataw_lsb < 64) {
643 if (spd.mem_type == SPD_MEMTYPE_DDR)
644 burstlen = 0x03; /* 32 bit data bus, burst len is 8 */
646 burstlen = 0x02; /* 32 bit data bus, burst len is 4 */
647 debug("\n DDR DIMM: data bus width is 32 bit");
649 burstlen = 0x02; /* Others act as 64 bit bus, burst len is 4 */
650 debug("\n DDR DIMM: data bus width is 64 bit");
653 /* Is this an ECC DDR chip? */
654 if (spd.config == 0x02)
655 debug(" with ECC\n");
657 debug(" without ECC\n");
659 /* Burst length is always 4 for 64 bit data bus, 8 for 32 bit data bus,
660 Burst type is sequential
662 if (spd.mem_type == SPD_MEMTYPE_DDR) {
665 ddr->sdram_mode = 0x50 | burstlen; /* CL=1.5 */
668 ddr->sdram_mode = 0x20 | burstlen; /* CL=2.0 */
671 ddr->sdram_mode = 0x60 | burstlen; /* CL=2.5 */
674 ddr->sdram_mode = 0x30 | burstlen; /* CL=3.0 */
677 printf("DDR:only CL 1.5, 2.0, 2.5, 3.0 is supported\n");
681 mode_odt_enable = 0x0; /* Default disabled */
682 if (odt_wr_cfg || odt_rd_cfg) {
684 * Bits 6 and 2 in Extended MRS(1)
685 * Bit 2 == 0x04 == 75 Ohm, with 2 DIMM modules.
686 * Bit 6 == 0x40 == 150 Ohm, with 1 DIMM module.
688 mode_odt_enable = 0x40; /* 150 Ohm */
693 | (1 << (16 + 10)) /* DQS Differential disable */
694 #ifdef CONFIG_SYS_DDR_MODE_WEAK
695 | (1 << (16 + 1)) /* weak driver (~60%) */
697 | (add_lat << (16 + 3)) /* Additive Latency in EMRS1 */
698 | (mode_odt_enable << 16) /* ODT Enable in EMRS1 */
699 | ((twr_clk - 1) << 9) /* Write Recovery Autopre */
700 | (caslat << 4) /* caslat */
701 | (burstlen << 0) /* Burst length */
704 debug("DDR:sdram_mode=0x%08x\n", ddr->sdram_mode);
707 * Clear EMRS2 and EMRS3.
709 ddr->sdram_mode2 = 0;
710 debug("DDR: sdram_mode2 = 0x%08x\n", ddr->sdram_mode2);
712 switch (spd.refresh) {
715 refresh_clk = picos_to_clk(15625000);
719 refresh_clk = picos_to_clk(3900000);
723 refresh_clk = picos_to_clk(7800000);
727 refresh_clk = picos_to_clk(31300000);
731 refresh_clk = picos_to_clk(62500000);
735 refresh_clk = picos_to_clk(125000000);
743 * Set BSTOPRE to 0x100 for page mode
744 * If auto-charge is used, set BSTOPRE = 0
746 ddr->sdram_interval = ((refresh_clk & 0x3fff) << 16) | 0x100;
747 debug("DDR:sdram_interval=0x%08x\n", ddr->sdram_interval);
753 #ifndef CONFIG_NEVER_ASSERT_ODT_TO_CPU
754 if (odt_rd_cfg | odt_wr_cfg) {
755 odt_cfg = 0x2; /* ODT to IOs during reads */
758 if (spd.mem_type == SPD_MEMTYPE_DDR2) {
760 | (0 << 26) /* True DQS */
761 | (odt_cfg << 21) /* ODT only read */
762 | (1 << 12) /* 1 refresh at a time */
765 debug("DDR: sdram_cfg2 = 0x%08x\n", ddr->sdram_cfg2);
768 #ifdef CONFIG_SYS_DDR_SDRAM_CLK_CNTL /* Optional platform specific value */
769 ddr->sdram_clk_cntl = CONFIG_SYS_DDR_SDRAM_CLK_CNTL;
771 debug("DDR:sdram_clk_cntl=0x%08x\n", ddr->sdram_clk_cntl);
779 * Figure out the settings for the sdram_cfg register. Build up
780 * the value in 'sdram_cfg' before writing since the write into
781 * the register will actually enable the memory controller, and all
782 * settings must be done before enabling.
784 * sdram_cfg[0] = 1 (ddr sdram logic enable)
785 * sdram_cfg[1] = 1 (self-refresh-enable)
786 * sdram_cfg[5:7] = (SDRAM type = DDR SDRAM)
789 * sdram_cfg[12] = 0 (32_BE =0 , 64 bit bus mode)
790 * sdram_cfg[13] = 0 (8_BE =0, 4-beat bursts)
792 if (spd.mem_type == SPD_MEMTYPE_DDR)
793 sdram_type = SDRAM_CFG_SDRAM_TYPE_DDR1;
795 sdram_type = SDRAM_CFG_SDRAM_TYPE_DDR2;
798 | SDRAM_CFG_MEM_EN /* DDR enable */
799 | SDRAM_CFG_SREN /* Self refresh */
800 | sdram_type /* SDRAM type */
803 /* sdram_cfg[3] = RD_EN - registered DIMM enable */
804 if (spd.mod_attr & 0x02)
805 sdram_cfg |= SDRAM_CFG_RD_EN;
807 /* The DIMM is 32bit width */
808 if (spd.dataw_lsb < 64) {
809 if (spd.mem_type == SPD_MEMTYPE_DDR)
810 sdram_cfg |= SDRAM_CFG_32_BE | SDRAM_CFG_8_BE;
811 if (spd.mem_type == SPD_MEMTYPE_DDR2)
812 sdram_cfg |= SDRAM_CFG_32_BE;
817 #if defined(CONFIG_DDR_ECC)
818 /* Enable ECC with sdram_cfg[2] */
819 if (spd.config == 0x02) {
820 sdram_cfg |= 0x20000000;
822 /* disable error detection */
823 ddr->err_disable = ~ECC_ERROR_ENABLE;
824 /* set single bit error threshold to maximum value,
825 * reset counter to zero */
826 ddr->err_sbe = (255 << ECC_ERROR_MAN_SBET_SHIFT) |
827 (0 << ECC_ERROR_MAN_SBEC_SHIFT);
830 debug("DDR:err_disable=0x%08x\n", ddr->err_disable);
831 debug("DDR:err_sbe=0x%08x\n", ddr->err_sbe);
833 debug(" DDRC ECC mode: %s\n", ddrc_ecc_enable ? "ON":"OFF");
835 #if defined(CONFIG_DDR_2T_TIMING)
837 * Enable 2T timing by setting sdram_cfg[16].
839 sdram_cfg |= SDRAM_CFG_2T_EN;
841 /* Enable controller, and GO! */
842 ddr->sdram_cfg = sdram_cfg;
847 debug("DDR:sdram_cfg=0x%08x\n", ddr->sdram_cfg);
848 return memsize; /*in MBytes*/
850 #endif /* CONFIG_SPD_EEPROM */
852 #if defined(CONFIG_DDR_ECC) && !defined(CONFIG_ECC_INIT_VIA_DDRCONTROLLER)
853 static inline u32 mftbu(void)
857 asm volatile("mftbu %0" : "=r" (rval));
861 static inline u32 mftb(void)
865 asm volatile("mftb %0" : "=r" (rval));
870 * Use timebase counter, get_timer() is not available
871 * at this point of initialization yet.
873 static __inline__ unsigned long get_tbms (void)
876 unsigned long tbu1, tbu2;
878 unsigned long long tmp;
880 ulong tbclk = get_tbclk();
882 /* get the timebase ticks */
887 } while (tbu1 != tbu2);
889 /* convert ticks to ms */
890 tmp = (unsigned long long)(tbu1);
892 tmp += (unsigned long long)(tbl);
893 ms = tmp/(tbclk/1000);
899 * Initialize all of memory for ECC, then enable errors.
901 void ddr_enable_ecc(unsigned int dram_size)
903 volatile immap_t *immap = (immap_t *)CONFIG_SYS_IMMR;
904 volatile ddr83xx_t *ddr= &immap->ddr;
905 unsigned long t_start, t_end;
908 unsigned int pattern[2];
911 t_start = get_tbms();
912 pattern[0] = 0xdeadbeef;
913 pattern[1] = 0xdeadbeef;
915 #if defined(CONFIG_DDR_ECC_INIT_VIA_DMA)
916 dma_meminit(pattern[0], dram_size);
918 debug("ddr init: CPU FP write method\n");
920 for (p = 0; p < (u64*)(size); p++) {
921 ppcDWstore((u32*)p, pattern);
929 debug("\nREADY!!\n");
930 debug("ddr init duration: %ld ms\n", t_end - t_start);
932 /* Clear All ECC Errors */
933 if ((ddr->err_detect & ECC_ERROR_DETECT_MME) == ECC_ERROR_DETECT_MME)
934 ddr->err_detect |= ECC_ERROR_DETECT_MME;
935 if ((ddr->err_detect & ECC_ERROR_DETECT_MBE) == ECC_ERROR_DETECT_MBE)
936 ddr->err_detect |= ECC_ERROR_DETECT_MBE;
937 if ((ddr->err_detect & ECC_ERROR_DETECT_SBE) == ECC_ERROR_DETECT_SBE)
938 ddr->err_detect |= ECC_ERROR_DETECT_SBE;
939 if ((ddr->err_detect & ECC_ERROR_DETECT_MSE) == ECC_ERROR_DETECT_MSE)
940 ddr->err_detect |= ECC_ERROR_DETECT_MSE;
942 /* Disable ECC-Interrupts */
943 ddr->err_int_en &= ECC_ERR_INT_DISABLE;
945 /* Enable errors for ECC */
946 ddr->err_disable &= ECC_ERROR_ENABLE;
951 #endif /* CONFIG_DDR_ECC */
953 #endif /* !CONFIG_MPC83XX_SDRAM */