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
17 #include <asm/processor.h>
22 #include <spd_sdram.h>
24 DECLARE_GLOBAL_DATA_PTR;
26 void board_add_ram_info(int use_default)
28 volatile immap_t *immap = (immap_t *) CONFIG_SYS_IMMR;
29 volatile ddr83xx_t *ddr = &immap->ddr;
32 printf(" (DDR%d", ((ddr->sdram_cfg & SDRAM_CFG_SDRAM_TYPE_MASK)
33 >> SDRAM_CFG_SDRAM_TYPE_SHIFT) - 1);
35 #if defined(CONFIG_ARCH_MPC8308) || defined(CONFIG_ARCH_MPC831X)
36 if ((ddr->sdram_cfg & SDRAM_CFG_DBW_MASK) == SDRAM_CFG_DBW_16)
38 else if ((ddr->sdram_cfg & SDRAM_CFG_DBW_MASK) == SDRAM_CFG_DBW_32)
41 puts(", unknown width");
43 if (ddr->sdram_cfg & SDRAM_CFG_32_BE)
49 if (ddr->sdram_cfg & SDRAM_CFG_ECC_EN)
54 printf(", %s MHz)", strmhz(buf, gd->mem_clk));
56 #if defined(CONFIG_SYS_LB_SDRAM) && defined(CONFIG_SYS_LBC_SDRAM_SIZE)
58 print_size (CONFIG_SYS_LBC_SDRAM_SIZE * 1024 * 1024, " (local bus)");
62 #ifdef CONFIG_SPD_EEPROM
63 #ifndef CONFIG_SYS_READ_SPD
64 #define CONFIG_SYS_READ_SPD i2c_read
66 #ifndef SPD_EEPROM_OFFSET
67 #define SPD_EEPROM_OFFSET 0
69 #ifndef SPD_EEPROM_ADDR_LEN
70 #define SPD_EEPROM_ADDR_LEN 1
74 * Convert picoseconds into clock cycles (rounding up if needed).
77 picos_to_clk(int picos)
79 unsigned int mem_bus_clk;
82 mem_bus_clk = gd->mem_clk >> 1;
83 clks = picos / (1000000000 / (mem_bus_clk / 1000));
84 if (picos % (1000000000 / (mem_bus_clk / 1000)) != 0)
90 unsigned int banksize(unsigned char row_dens)
92 return ((row_dens >> 2) | ((row_dens & 3) << 6)) << 24;
95 int read_spd(uint addr)
102 static void spd_debug(spd_eeprom_t *spd)
104 printf ("\nDIMM type: %-18.18s\n", spd->mpart);
105 printf ("SPD size: %d\n", spd->info_size);
106 printf ("EEPROM size: %d\n", 1 << spd->chip_size);
107 printf ("Memory type: %d\n", spd->mem_type);
108 printf ("Row addr: %d\n", spd->nrow_addr);
109 printf ("Column addr: %d\n", spd->ncol_addr);
110 printf ("# of rows: %d\n", spd->nrows);
111 printf ("Row density: %d\n", spd->row_dens);
112 printf ("# of banks: %d\n", spd->nbanks);
113 printf ("Data width: %d\n",
114 256 * spd->dataw_msb + spd->dataw_lsb);
115 printf ("Chip width: %d\n", spd->primw);
116 printf ("Refresh rate: %02X\n", spd->refresh);
117 printf ("CAS latencies: %02X\n", spd->cas_lat);
118 printf ("Write latencies: %02X\n", spd->write_lat);
119 printf ("tRP: %d\n", spd->trp);
120 printf ("tRCD: %d\n", spd->trcd);
123 #endif /* SPD_DEBUG */
127 volatile immap_t *immap = (immap_t *)CONFIG_SYS_IMMR;
128 volatile ddr83xx_t *ddr = &immap->ddr;
129 volatile law83xx_t *ecm = &immap->sysconf.ddrlaw[0];
131 unsigned int n_ranks;
132 unsigned int odt_rd_cfg, odt_wr_cfg;
133 unsigned char twr_clk, twtr_clk;
134 unsigned int sdram_type;
135 unsigned int memsize;
136 unsigned int law_size;
137 unsigned char caslat, caslat_ctrl;
138 unsigned int trfc, trfc_clk, trfc_low;
139 unsigned int trcd_clk, trtp_clk;
140 unsigned char cke_min_clk;
141 unsigned char add_lat, wr_lat;
142 unsigned char wr_data_delay;
143 unsigned char four_act;
145 unsigned char burstlen;
146 unsigned char odt_cfg, mode_odt_enable;
147 unsigned int max_bus_clk;
148 unsigned int max_data_rate, effective_data_rate;
149 unsigned int ddrc_clk;
150 unsigned int refresh_clk;
151 unsigned int sdram_cfg;
152 unsigned int ddrc_ecc_enable;
153 unsigned int pvr = get_pvr();
156 * First disable the memory controller (could be enabled
159 clrsetbits_be32(&ddr->sdram_cfg, SDRAM_CFG_MEM_EN, 0);
163 /* Read SPD parameters with I2C */
164 CONFIG_SYS_READ_SPD(SPD_EEPROM_ADDRESS, SPD_EEPROM_OFFSET,
165 SPD_EEPROM_ADDR_LEN, (uchar *) &spd, sizeof(spd));
169 /* Check the memory type */
170 if (spd.mem_type != SPD_MEMTYPE_DDR && spd.mem_type != SPD_MEMTYPE_DDR2) {
171 debug("DDR: Module mem type is %02X\n", spd.mem_type);
175 /* Check the number of physical bank */
176 if (spd.mem_type == SPD_MEMTYPE_DDR) {
179 n_ranks = (spd.nrows & 0x7) + 1;
183 printf("DDR: The number of physical bank is %02X\n", n_ranks);
187 /* Check if the number of row of the module is in the range of DDRC */
188 if (spd.nrow_addr < 12 || spd.nrow_addr > 15) {
189 printf("DDR: Row number is out of range of DDRC, row=%02X\n",
194 /* Check if the number of col of the module is in the range of DDRC */
195 if (spd.ncol_addr < 8 || spd.ncol_addr > 11) {
196 printf("DDR: Col number is out of range of DDRC, col=%02X\n",
201 #ifdef CONFIG_SYS_DDRCDR_VALUE
203 * Adjust DDR II IO voltage biasing. It just makes it work.
205 if(spd.mem_type == SPD_MEMTYPE_DDR2) {
206 immap->sysconf.ddrcdr = CONFIG_SYS_DDRCDR_VALUE;
212 * ODT configuration recommendation from DDR Controller Chapter.
214 odt_rd_cfg = 0; /* Never assert ODT */
215 odt_wr_cfg = 0; /* Never assert ODT */
216 if (spd.mem_type == SPD_MEMTYPE_DDR2) {
217 odt_wr_cfg = 1; /* Assert ODT on writes to CSn */
220 /* Setup DDR chip select register */
221 #ifdef CONFIG_SYS_83XX_DDR_USES_CS0
222 ddr->csbnds[0].csbnds = (banksize(spd.row_dens) >> 24) - 1;
223 ddr->cs_config[0] = ( 1 << 31
226 | ((spd.nbanks == 8 ? 1 : 0) << 14)
227 | ((spd.nrow_addr - 12) << 8)
228 | (spd.ncol_addr - 8) );
230 debug("cs0_bnds = 0x%08x\n",ddr->csbnds[0].csbnds);
231 debug("cs0_config = 0x%08x\n",ddr->cs_config[0]);
234 ddr->csbnds[1].csbnds = ( (banksize(spd.row_dens) >> 8)
235 | ((banksize(spd.row_dens) >> 23) - 1) );
236 ddr->cs_config[1] = ( 1<<31
239 | ((spd.nbanks == 8 ? 1 : 0) << 14)
240 | ((spd.nrow_addr - 12) << 8)
241 | (spd.ncol_addr - 8) );
242 debug("cs1_bnds = 0x%08x\n",ddr->csbnds[1].csbnds);
243 debug("cs1_config = 0x%08x\n",ddr->cs_config[1]);
247 ddr->csbnds[2].csbnds = (banksize(spd.row_dens) >> 24) - 1;
248 ddr->cs_config[2] = ( 1 << 31
251 | ((spd.nbanks == 8 ? 1 : 0) << 14)
252 | ((spd.nrow_addr - 12) << 8)
253 | (spd.ncol_addr - 8) );
255 debug("cs2_bnds = 0x%08x\n",ddr->csbnds[2].csbnds);
256 debug("cs2_config = 0x%08x\n",ddr->cs_config[2]);
259 ddr->csbnds[3].csbnds = ( (banksize(spd.row_dens) >> 8)
260 | ((banksize(spd.row_dens) >> 23) - 1) );
261 ddr->cs_config[3] = ( 1<<31
264 | ((spd.nbanks == 8 ? 1 : 0) << 14)
265 | ((spd.nrow_addr - 12) << 8)
266 | (spd.ncol_addr - 8) );
267 debug("cs3_bnds = 0x%08x\n",ddr->csbnds[3].csbnds);
268 debug("cs3_config = 0x%08x\n",ddr->cs_config[3]);
273 * Figure out memory size in Megabytes.
275 memsize = n_ranks * banksize(spd.row_dens) / 0x100000;
278 * First supported LAW size is 16M, at LAWAR_SIZE_16M == 23.
280 law_size = 19 + __ilog2(memsize);
283 * Set up LAWBAR for all of DDR.
285 ecm->bar = CONFIG_SYS_SDRAM_BASE & 0xfffff000;
286 ecm->ar = (LAWAR_EN | LAWAR_TRGT_IF_DDR | (LAWAR_SIZE & law_size));
287 debug("DDR:bar=0x%08x\n", ecm->bar);
288 debug("DDR:ar=0x%08x\n", ecm->ar);
291 * Find the largest CAS by locating the highest 1 bit
292 * in the spd.cas_lat field. Translate it to a DDR
293 * controller field value:
295 * CAS Lat DDR I DDR II Ctrl
296 * Clocks SPD Bit SPD Bit Value
297 * ------- ------- ------- -----
308 caslat = __ilog2(spd.cas_lat);
309 if ((spd.mem_type == SPD_MEMTYPE_DDR)
311 printf("DDR I: Invalid SPD CAS Latency: 0x%x.\n", spd.cas_lat);
313 } else if (spd.mem_type == SPD_MEMTYPE_DDR2
314 && (caslat < 2 || caslat > 5)) {
315 printf("DDR II: Invalid SPD CAS Latency: 0x%x.\n",
319 debug("DDR: caslat SPD bit is %d\n", caslat);
321 max_bus_clk = 1000 *10 / (((spd.clk_cycle & 0xF0) >> 4) * 10
322 + (spd.clk_cycle & 0x0f));
323 max_data_rate = max_bus_clk * 2;
325 debug("DDR:Module maximum data rate is: %d MHz\n", max_data_rate);
327 ddrc_clk = gd->mem_clk / 1000000;
328 effective_data_rate = 0;
330 if (max_data_rate >= 460) { /* it is DDR2-800, 667, 533 */
331 if (spd.cas_lat & 0x08)
335 if (ddrc_clk <= 460 && ddrc_clk > 350)
336 effective_data_rate = 400;
337 else if (ddrc_clk <=350 && ddrc_clk > 280)
338 effective_data_rate = 333;
339 else if (ddrc_clk <= 280 && ddrc_clk > 230)
340 effective_data_rate = 266;
342 effective_data_rate = 200;
343 } else if (max_data_rate >= 390 && max_data_rate < 460) { /* it is DDR 400 */
344 if (ddrc_clk <= 460 && ddrc_clk > 350) {
345 /* DDR controller clk at 350~460 */
346 effective_data_rate = 400; /* 5ns */
348 } else if (ddrc_clk <= 350 && ddrc_clk > 280) {
349 /* DDR controller clk at 280~350 */
350 effective_data_rate = 333; /* 6ns */
351 if (spd.clk_cycle2 == 0x60)
355 } else if (ddrc_clk <= 280 && ddrc_clk > 230) {
356 /* DDR controller clk at 230~280 */
357 effective_data_rate = 266; /* 7.5ns */
358 if (spd.clk_cycle3 == 0x75)
360 else if (spd.clk_cycle2 == 0x75)
364 } else if (ddrc_clk <= 230 && ddrc_clk > 90) {
365 /* DDR controller clk at 90~230 */
366 effective_data_rate = 200; /* 10ns */
367 if (spd.clk_cycle3 == 0xa0)
369 else if (spd.clk_cycle2 == 0xa0)
374 } else if (max_data_rate >= 323) { /* it is DDR 333 */
375 if (ddrc_clk <= 350 && ddrc_clk > 280) {
376 /* DDR controller clk at 280~350 */
377 effective_data_rate = 333; /* 6ns */
379 } else if (ddrc_clk <= 280 && ddrc_clk > 230) {
380 /* DDR controller clk at 230~280 */
381 effective_data_rate = 266; /* 7.5ns */
382 if (spd.clk_cycle2 == 0x75)
386 } else if (ddrc_clk <= 230 && ddrc_clk > 90) {
387 /* DDR controller clk at 90~230 */
388 effective_data_rate = 200; /* 10ns */
389 if (spd.clk_cycle3 == 0xa0)
391 else if (spd.clk_cycle2 == 0xa0)
396 } else if (max_data_rate >= 256) { /* it is DDR 266 */
397 if (ddrc_clk <= 350 && ddrc_clk > 280) {
398 /* DDR controller clk at 280~350 */
399 printf("DDR: DDR controller freq is more than "
400 "max data rate of the module\n");
402 } else if (ddrc_clk <= 280 && ddrc_clk > 230) {
403 /* DDR controller clk at 230~280 */
404 effective_data_rate = 266; /* 7.5ns */
406 } else if (ddrc_clk <= 230 && ddrc_clk > 90) {
407 /* DDR controller clk at 90~230 */
408 effective_data_rate = 200; /* 10ns */
409 if (spd.clk_cycle2 == 0xa0)
412 } else if (max_data_rate >= 190) { /* it is DDR 200 */
413 if (ddrc_clk <= 350 && ddrc_clk > 230) {
414 /* DDR controller clk at 230~350 */
415 printf("DDR: DDR controller freq is more than "
416 "max data rate of the module\n");
418 } else if (ddrc_clk <= 230 && ddrc_clk > 90) {
419 /* DDR controller clk at 90~230 */
420 effective_data_rate = 200; /* 10ns */
425 debug("DDR:Effective data rate is: %dMHz\n", effective_data_rate);
426 debug("DDR:The MSB 1 of CAS Latency is: %d\n", caslat);
429 * Errata DDR6 work around: input enable 2 cycles earlier.
430 * including MPC834X Rev1.0/1.1 and MPC8360 Rev1.1/1.2.
432 if(PVR_MAJ(pvr) <= 1 && spd.mem_type == SPD_MEMTYPE_DDR){
434 ddr->debug_reg = 0x201c0000; /* CL=2 */
435 else if (caslat == 3)
436 ddr->debug_reg = 0x202c0000; /* CL=2.5 */
437 else if (caslat == 4)
438 ddr->debug_reg = 0x202c0000; /* CL=3.0 */
442 debug("Errata DDR6 (debug_reg=0x%08x)\n", ddr->debug_reg);
446 * Convert caslat clocks to DDR controller value.
447 * Force caslat_ctrl to be DDR Controller field-sized.
449 if (spd.mem_type == SPD_MEMTYPE_DDR) {
450 caslat_ctrl = (caslat + 1) & 0x07;
452 caslat_ctrl = (2 * caslat - 1) & 0x0f;
455 debug("DDR: effective data rate is %d MHz\n", effective_data_rate);
456 debug("DDR: caslat SPD bit is %d, controller field is 0x%x\n",
457 caslat, caslat_ctrl);
461 * Avoid writing for DDR I.
463 if (spd.mem_type == SPD_MEMTYPE_DDR2) {
464 unsigned char taxpd_clk = 8; /* By the book. */
465 unsigned char tmrd_clk = 2; /* By the book. */
466 unsigned char act_pd_exit = 2; /* Empirical? */
467 unsigned char pre_pd_exit = 6; /* Empirical? */
469 ddr->timing_cfg_0 = (0
470 | ((act_pd_exit & 0x7) << 20) /* ACT_PD_EXIT */
471 | ((pre_pd_exit & 0x7) << 16) /* PRE_PD_EXIT */
472 | ((taxpd_clk & 0xf) << 8) /* ODT_PD_EXIT */
473 | ((tmrd_clk & 0xf) << 0) /* MRS_CYC */
475 debug("DDR: timing_cfg_0 = 0x%08x\n", ddr->timing_cfg_0);
479 * For DDR I, WRREC(Twr) and WRTORD(Twtr) are not in SPD,
480 * use conservative value.
481 * For DDR II, they are bytes 36 and 37, in quarter nanos.
484 if (spd.mem_type == SPD_MEMTYPE_DDR) {
485 twr_clk = 3; /* Clocks */
486 twtr_clk = 1; /* Clocks */
488 twr_clk = picos_to_clk(spd.twr * 250);
489 twtr_clk = picos_to_clk(spd.twtr * 250);
495 * Calculate Trfc, in picos.
496 * DDR I: Byte 42 straight up in ns.
497 * DDR II: Byte 40 and 42 swizzled some, in ns.
499 if (spd.mem_type == SPD_MEMTYPE_DDR) {
500 trfc = spd.trfc * 1000; /* up to ps */
502 unsigned int byte40_table_ps[8] = {
513 trfc = (((spd.trctrfc_ext & 0x1) * 256) + spd.trfc) * 1000
514 + byte40_table_ps[(spd.trctrfc_ext >> 1) & 0x7];
516 trfc_clk = picos_to_clk(trfc);
519 * Trcd, Byte 29, from quarter nanos to ps and clocks.
521 trcd_clk = picos_to_clk(spd.trcd * 250) & 0x7;
524 * Convert trfc_clk to DDR controller fields. DDR I should
525 * fit in the REFREC field (16-19) of TIMING_CFG_1, but the
526 * 83xx controller has an extended REFREC field of three bits.
527 * The controller automatically adds 8 clocks to this value,
528 * so preadjust it down 8 first before splitting it up.
530 trfc_low = (trfc_clk - 8) & 0xf;
533 (((picos_to_clk(spd.trp * 250) & 0x07) << 28 ) | /* PRETOACT */
534 ((picos_to_clk(spd.tras * 1000) & 0x0f ) << 24 ) | /* ACTTOPRE */
535 (trcd_clk << 20 ) | /* ACTTORW */
536 (caslat_ctrl << 16 ) | /* CASLAT */
537 (trfc_low << 12 ) | /* REFEC */
538 ((twr_clk & 0x07) << 8) | /* WRRREC */
539 ((picos_to_clk(spd.trrd * 250) & 0x07) << 4) | /* ACTTOACT */
540 ((twtr_clk & 0x07) << 0) /* WRTORD */
546 * For DDR II, with ODT enabled, use "a value" less than ACTTORW,
547 * which comes from Trcd, and also note that:
548 * add_lat + caslat must be >= 4
551 if (spd.mem_type == SPD_MEMTYPE_DDR2
552 && (odt_wr_cfg || odt_rd_cfg)
554 add_lat = 4 - caslat;
555 if ((add_lat + caslat) < 4) {
562 * Historically 0x2 == 4/8 clock delay.
563 * Empirically, 0x3 == 6/8 clock delay is suggested for DDR I 266.
566 #ifdef CONFIG_SYS_DDR_WRITE_DATA_DELAY
567 wr_data_delay = CONFIG_SYS_DDR_WRITE_DATA_DELAY;
573 * Minimum CKE Pulse Width.
574 * Four Activate Window
576 if (spd.mem_type == SPD_MEMTYPE_DDR) {
578 * This is a lie. It should really be 1, but if it is
579 * set to 1, bits overlap into the old controller's
580 * otherwise unused ACSM field. If we leave it 0, then
581 * the HW will magically treat it as 1 for DDR 1. Oh Yea.
585 trtp_clk = 2; /* By the book. */
586 cke_min_clk = 1; /* By the book. */
587 four_act = 1; /* By the book. */
592 /* Convert SPD value from quarter nanos to picos. */
593 trtp_clk = picos_to_clk(spd.trtp * 250);
598 cke_min_clk = 3; /* By the book. */
599 four_act = picos_to_clk(37500); /* By the book. 1k pages? */
603 * Empirically set ~MCAS-to-preamble override for DDR 2.
604 * Your mileage will vary.
607 if (spd.mem_type == SPD_MEMTYPE_DDR2) {
608 #ifdef CONFIG_SYS_DDR_CPO
609 cpo = CONFIG_SYS_DDR_CPO;
611 if (effective_data_rate == 266) {
612 cpo = 0x4; /* READ_LAT + 1/2 */
613 } else if (effective_data_rate == 333) {
614 cpo = 0x6; /* READ_LAT + 1 */
615 } else if (effective_data_rate == 400) {
616 cpo = 0x7; /* READ_LAT + 5/4 */
618 /* Automatic calibration */
624 ddr->timing_cfg_2 = (0
625 | ((add_lat & 0x7) << 28) /* ADD_LAT */
626 | ((cpo & 0x1f) << 23) /* CPO */
627 | ((wr_lat & 0x7) << 19) /* WR_LAT */
628 | ((trtp_clk & 0x7) << 13) /* RD_TO_PRE */
629 | ((wr_data_delay & 0x7) << 10) /* WR_DATA_DELAY */
630 | ((cke_min_clk & 0x7) << 6) /* CKE_PLS */
631 | ((four_act & 0x1f) << 0) /* FOUR_ACT */
634 debug("DDR:timing_cfg_1=0x%08x\n", ddr->timing_cfg_1);
635 debug("DDR:timing_cfg_2=0x%08x\n", ddr->timing_cfg_2);
637 /* Check DIMM data bus width */
638 if (spd.dataw_lsb < 64) {
639 if (spd.mem_type == SPD_MEMTYPE_DDR)
640 burstlen = 0x03; /* 32 bit data bus, burst len is 8 */
642 burstlen = 0x02; /* 32 bit data bus, burst len is 4 */
643 debug("\n DDR DIMM: data bus width is 32 bit");
645 burstlen = 0x02; /* Others act as 64 bit bus, burst len is 4 */
646 debug("\n DDR DIMM: data bus width is 64 bit");
649 /* Is this an ECC DDR chip? */
650 if (spd.config == 0x02)
651 debug(" with ECC\n");
653 debug(" without ECC\n");
655 /* Burst length is always 4 for 64 bit data bus, 8 for 32 bit data bus,
656 Burst type is sequential
658 if (spd.mem_type == SPD_MEMTYPE_DDR) {
661 ddr->sdram_mode = 0x50 | burstlen; /* CL=1.5 */
664 ddr->sdram_mode = 0x20 | burstlen; /* CL=2.0 */
667 ddr->sdram_mode = 0x60 | burstlen; /* CL=2.5 */
670 ddr->sdram_mode = 0x30 | burstlen; /* CL=3.0 */
673 printf("DDR:only CL 1.5, 2.0, 2.5, 3.0 is supported\n");
677 mode_odt_enable = 0x0; /* Default disabled */
678 if (odt_wr_cfg || odt_rd_cfg) {
680 * Bits 6 and 2 in Extended MRS(1)
681 * Bit 2 == 0x04 == 75 Ohm, with 2 DIMM modules.
682 * Bit 6 == 0x40 == 150 Ohm, with 1 DIMM module.
684 mode_odt_enable = 0x40; /* 150 Ohm */
689 | (1 << (16 + 10)) /* DQS Differential disable */
690 #ifdef CONFIG_SYS_DDR_MODE_WEAK
691 | (1 << (16 + 1)) /* weak driver (~60%) */
693 | (add_lat << (16 + 3)) /* Additive Latency in EMRS1 */
694 | (mode_odt_enable << 16) /* ODT Enable in EMRS1 */
695 | ((twr_clk - 1) << 9) /* Write Recovery Autopre */
696 | (caslat << 4) /* caslat */
697 | (burstlen << 0) /* Burst length */
700 debug("DDR:sdram_mode=0x%08x\n", ddr->sdram_mode);
703 * Clear EMRS2 and EMRS3.
705 ddr->sdram_mode2 = 0;
706 debug("DDR: sdram_mode2 = 0x%08x\n", ddr->sdram_mode2);
708 switch (spd.refresh) {
711 refresh_clk = picos_to_clk(15625000);
715 refresh_clk = picos_to_clk(3900000);
719 refresh_clk = picos_to_clk(7800000);
723 refresh_clk = picos_to_clk(31300000);
727 refresh_clk = picos_to_clk(62500000);
731 refresh_clk = picos_to_clk(125000000);
739 * Set BSTOPRE to 0x100 for page mode
740 * If auto-charge is used, set BSTOPRE = 0
742 ddr->sdram_interval = ((refresh_clk & 0x3fff) << 16) | 0x100;
743 debug("DDR:sdram_interval=0x%08x\n", ddr->sdram_interval);
749 #ifndef CONFIG_NEVER_ASSERT_ODT_TO_CPU
750 if (odt_rd_cfg | odt_wr_cfg) {
751 odt_cfg = 0x2; /* ODT to IOs during reads */
754 if (spd.mem_type == SPD_MEMTYPE_DDR2) {
756 | (0 << 26) /* True DQS */
757 | (odt_cfg << 21) /* ODT only read */
758 | (1 << 12) /* 1 refresh at a time */
761 debug("DDR: sdram_cfg2 = 0x%08x\n", ddr->sdram_cfg2);
764 #ifdef CONFIG_SYS_DDR_SDRAM_CLK_CNTL /* Optional platform specific value */
765 ddr->sdram_clk_cntl = CONFIG_SYS_DDR_SDRAM_CLK_CNTL;
767 debug("DDR:sdram_clk_cntl=0x%08x\n", ddr->sdram_clk_cntl);
775 * Figure out the settings for the sdram_cfg register. Build up
776 * the value in 'sdram_cfg' before writing since the write into
777 * the register will actually enable the memory controller, and all
778 * settings must be done before enabling.
780 * sdram_cfg[0] = 1 (ddr sdram logic enable)
781 * sdram_cfg[1] = 1 (self-refresh-enable)
782 * sdram_cfg[5:7] = (SDRAM type = DDR SDRAM)
785 * sdram_cfg[12] = 0 (32_BE =0 , 64 bit bus mode)
786 * sdram_cfg[13] = 0 (8_BE =0, 4-beat bursts)
788 if (spd.mem_type == SPD_MEMTYPE_DDR)
789 sdram_type = SDRAM_CFG_SDRAM_TYPE_DDR1;
791 sdram_type = SDRAM_CFG_SDRAM_TYPE_DDR2;
794 | SDRAM_CFG_MEM_EN /* DDR enable */
795 | SDRAM_CFG_SREN /* Self refresh */
796 | sdram_type /* SDRAM type */
799 /* sdram_cfg[3] = RD_EN - registered DIMM enable */
800 if (spd.mod_attr & 0x02)
801 sdram_cfg |= SDRAM_CFG_RD_EN;
803 /* The DIMM is 32bit width */
804 if (spd.dataw_lsb < 64) {
805 if (spd.mem_type == SPD_MEMTYPE_DDR)
806 sdram_cfg |= SDRAM_CFG_32_BE | SDRAM_CFG_8_BE;
807 if (spd.mem_type == SPD_MEMTYPE_DDR2)
808 sdram_cfg |= SDRAM_CFG_32_BE;
813 #if defined(CONFIG_DDR_ECC)
814 /* Enable ECC with sdram_cfg[2] */
815 if (spd.config == 0x02) {
816 sdram_cfg |= 0x20000000;
818 /* disable error detection */
819 ddr->err_disable = ~ECC_ERROR_ENABLE;
820 /* set single bit error threshold to maximum value,
821 * reset counter to zero */
822 ddr->err_sbe = (255 << ECC_ERROR_MAN_SBET_SHIFT) |
823 (0 << ECC_ERROR_MAN_SBEC_SHIFT);
826 debug("DDR:err_disable=0x%08x\n", ddr->err_disable);
827 debug("DDR:err_sbe=0x%08x\n", ddr->err_sbe);
829 debug(" DDRC ECC mode: %s\n", ddrc_ecc_enable ? "ON":"OFF");
831 #if defined(CONFIG_DDR_2T_TIMING)
833 * Enable 2T timing by setting sdram_cfg[16].
835 sdram_cfg |= SDRAM_CFG_2T_EN;
837 /* Enable controller, and GO! */
838 ddr->sdram_cfg = sdram_cfg;
843 debug("DDR:sdram_cfg=0x%08x\n", ddr->sdram_cfg);
844 return memsize; /*in MBytes*/
846 #endif /* CONFIG_SPD_EEPROM */
848 #if defined(CONFIG_DDR_ECC) && !defined(CONFIG_ECC_INIT_VIA_DDRCONTROLLER)
849 static inline u32 mftbu(void)
853 asm volatile("mftbu %0" : "=r" (rval));
857 static inline u32 mftb(void)
861 asm volatile("mftb %0" : "=r" (rval));
866 * Use timebase counter, get_timer() is not available
867 * at this point of initialization yet.
869 static __inline__ unsigned long get_tbms (void)
872 unsigned long tbu1, tbu2;
874 unsigned long long tmp;
876 ulong tbclk = get_tbclk();
878 /* get the timebase ticks */
883 } while (tbu1 != tbu2);
885 /* convert ticks to ms */
886 tmp = (unsigned long long)(tbu1);
888 tmp += (unsigned long long)(tbl);
889 ms = tmp/(tbclk/1000);
895 * Initialize all of memory for ECC, then enable errors.
897 void ddr_enable_ecc(unsigned int dram_size)
899 volatile immap_t *immap = (immap_t *)CONFIG_SYS_IMMR;
900 volatile ddr83xx_t *ddr= &immap->ddr;
901 unsigned long t_start, t_end;
904 unsigned int pattern[2];
907 t_start = get_tbms();
908 pattern[0] = 0xdeadbeef;
909 pattern[1] = 0xdeadbeef;
911 #if defined(CONFIG_DDR_ECC_INIT_VIA_DMA)
912 dma_meminit(pattern[0], dram_size);
914 debug("ddr init: CPU FP write method\n");
916 for (p = 0; p < (u64*)(size); p++) {
917 ppcDWstore((u32*)p, pattern);
925 debug("\nREADY!!\n");
926 debug("ddr init duration: %ld ms\n", t_end - t_start);
928 /* Clear All ECC Errors */
929 if ((ddr->err_detect & ECC_ERROR_DETECT_MME) == ECC_ERROR_DETECT_MME)
930 ddr->err_detect |= ECC_ERROR_DETECT_MME;
931 if ((ddr->err_detect & ECC_ERROR_DETECT_MBE) == ECC_ERROR_DETECT_MBE)
932 ddr->err_detect |= ECC_ERROR_DETECT_MBE;
933 if ((ddr->err_detect & ECC_ERROR_DETECT_SBE) == ECC_ERROR_DETECT_SBE)
934 ddr->err_detect |= ECC_ERROR_DETECT_SBE;
935 if ((ddr->err_detect & ECC_ERROR_DETECT_MSE) == ECC_ERROR_DETECT_MSE)
936 ddr->err_detect |= ECC_ERROR_DETECT_MSE;
938 /* Disable ECC-Interrupts */
939 ddr->err_int_en &= ECC_ERR_INT_DISABLE;
941 /* Enable errors for ECC */
942 ddr->err_disable &= ECC_ERROR_ENABLE;
947 #endif /* CONFIG_DDR_ECC */
949 #endif /* !CONFIG_MPC83XX_SDRAM */