2
* (C) Copyright 2006-2007 Freescale Semiconductor, Inc.
5
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
7
* Copyright (C) 2004-2006 Freescale Semiconductor, Inc.
8
* (C) Copyright 2003 Motorola Inc.
9
* Xianghua Xiao (X.Xiao@motorola.com)
11
* SPDX-License-Identifier: GPL-2.0+
15
#include <asm/processor.h>
20
#include <spd_sdram.h>
22
DECLARE_GLOBAL_DATA_PTR;
24
void board_add_ram_info(int use_default)
26
volatile immap_t *immap = (immap_t *) CONFIG_SYS_IMMR;
27
volatile ddr83xx_t *ddr = &immap->ddr;
30
printf(" (DDR%d", ((ddr->sdram_cfg & SDRAM_CFG_SDRAM_TYPE_MASK)
31
>> SDRAM_CFG_SDRAM_TYPE_SHIFT) - 1);
33
#if defined(CONFIG_MPC8308) || defined(CONFIG_MPC831x)
34
if ((ddr->sdram_cfg & SDRAM_CFG_DBW_MASK) == SDRAM_CFG_DBW_16)
36
else if ((ddr->sdram_cfg & SDRAM_CFG_DBW_MASK) == SDRAM_CFG_DBW_32)
39
puts(", unknown width");
41
if (ddr->sdram_cfg & SDRAM_CFG_32_BE)
47
if (ddr->sdram_cfg & SDRAM_CFG_ECC_EN)
52
printf(", %s MHz)", strmhz(buf, gd->mem_clk));
54
#if defined(CONFIG_SYS_LB_SDRAM) && defined(CONFIG_SYS_LBC_SDRAM_SIZE)
56
print_size (CONFIG_SYS_LBC_SDRAM_SIZE * 1024 * 1024, " (local bus)");
60
#ifdef CONFIG_SPD_EEPROM
61
#ifndef CONFIG_SYS_READ_SPD
62
#define CONFIG_SYS_READ_SPD i2c_read
64
#ifndef SPD_EEPROM_OFFSET
65
#define SPD_EEPROM_OFFSET 0
67
#ifndef SPD_EEPROM_ADDR_LEN
68
#define SPD_EEPROM_ADDR_LEN 1
72
* Convert picoseconds into clock cycles (rounding up if needed).
75
picos_to_clk(int picos)
77
unsigned int mem_bus_clk;
80
mem_bus_clk = gd->mem_clk >> 1;
81
clks = picos / (1000000000 / (mem_bus_clk / 1000));
82
if (picos % (1000000000 / (mem_bus_clk / 1000)) != 0)
88
unsigned int banksize(unsigned char row_dens)
90
return ((row_dens >> 2) | ((row_dens & 3) << 6)) << 24;
93
int read_spd(uint addr)
100
static void spd_debug(spd_eeprom_t *spd)
102
printf ("\nDIMM type: %-18.18s\n", spd->mpart);
103
printf ("SPD size: %d\n", spd->info_size);
104
printf ("EEPROM size: %d\n", 1 << spd->chip_size);
105
printf ("Memory type: %d\n", spd->mem_type);
106
printf ("Row addr: %d\n", spd->nrow_addr);
107
printf ("Column addr: %d\n", spd->ncol_addr);
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printf ("# of rows: %d\n", spd->nrows);
109
printf ("Row density: %d\n", spd->row_dens);
110
printf ("# of banks: %d\n", spd->nbanks);
111
printf ("Data width: %d\n",
112
256 * spd->dataw_msb + spd->dataw_lsb);
113
printf ("Chip width: %d\n", spd->primw);
114
printf ("Refresh rate: %02X\n", spd->refresh);
115
printf ("CAS latencies: %02X\n", spd->cas_lat);
116
printf ("Write latencies: %02X\n", spd->write_lat);
117
printf ("tRP: %d\n", spd->trp);
118
printf ("tRCD: %d\n", spd->trcd);
121
#endif /* SPD_DEBUG */
125
volatile immap_t *immap = (immap_t *)CONFIG_SYS_IMMR;
126
volatile ddr83xx_t *ddr = &immap->ddr;
127
volatile law83xx_t *ecm = &immap->sysconf.ddrlaw[0];
129
unsigned int n_ranks;
130
unsigned int odt_rd_cfg, odt_wr_cfg;
131
unsigned char twr_clk, twtr_clk;
132
unsigned int sdram_type;
133
unsigned int memsize;
134
unsigned int law_size;
135
unsigned char caslat, caslat_ctrl;
136
unsigned int trfc, trfc_clk, trfc_low;
137
unsigned int trcd_clk, trtp_clk;
138
unsigned char cke_min_clk;
139
unsigned char add_lat, wr_lat;
140
unsigned char wr_data_delay;
141
unsigned char four_act;
143
unsigned char burstlen;
144
unsigned char odt_cfg, mode_odt_enable;
145
unsigned int max_bus_clk;
146
unsigned int max_data_rate, effective_data_rate;
147
unsigned int ddrc_clk;
148
unsigned int refresh_clk;
149
unsigned int sdram_cfg;
150
unsigned int ddrc_ecc_enable;
151
unsigned int pvr = get_pvr();
154
* First disable the memory controller (could be enabled
157
clrsetbits_be32(&ddr->sdram_cfg, SDRAM_CFG_MEM_EN, 0);
161
/* Read SPD parameters with I2C */
162
CONFIG_SYS_READ_SPD(SPD_EEPROM_ADDRESS, SPD_EEPROM_OFFSET,
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SPD_EEPROM_ADDR_LEN, (uchar *) &spd, sizeof(spd));
167
/* Check the memory type */
168
if (spd.mem_type != SPD_MEMTYPE_DDR && spd.mem_type != SPD_MEMTYPE_DDR2) {
169
debug("DDR: Module mem type is %02X\n", spd.mem_type);
173
/* Check the number of physical bank */
174
if (spd.mem_type == SPD_MEMTYPE_DDR) {
177
n_ranks = (spd.nrows & 0x7) + 1;
181
printf("DDR: The number of physical bank is %02X\n", n_ranks);
185
/* Check if the number of row of the module is in the range of DDRC */
186
if (spd.nrow_addr < 12 || spd.nrow_addr > 15) {
187
printf("DDR: Row number is out of range of DDRC, row=%02X\n",
192
/* Check if the number of col of the module is in the range of DDRC */
193
if (spd.ncol_addr < 8 || spd.ncol_addr > 11) {
194
printf("DDR: Col number is out of range of DDRC, col=%02X\n",
199
#ifdef CONFIG_SYS_DDRCDR_VALUE
201
* Adjust DDR II IO voltage biasing. It just makes it work.
203
if(spd.mem_type == SPD_MEMTYPE_DDR2) {
204
immap->sysconf.ddrcdr = CONFIG_SYS_DDRCDR_VALUE;
210
* ODT configuration recommendation from DDR Controller Chapter.
212
odt_rd_cfg = 0; /* Never assert ODT */
213
odt_wr_cfg = 0; /* Never assert ODT */
214
if (spd.mem_type == SPD_MEMTYPE_DDR2) {
215
odt_wr_cfg = 1; /* Assert ODT on writes to CSn */
218
/* Setup DDR chip select register */
219
#ifdef CONFIG_SYS_83XX_DDR_USES_CS0
220
ddr->csbnds[0].csbnds = (banksize(spd.row_dens) >> 24) - 1;
221
ddr->cs_config[0] = ( 1 << 31
224
| ((spd.nbanks == 8 ? 1 : 0) << 14)
225
| ((spd.nrow_addr - 12) << 8)
226
| (spd.ncol_addr - 8) );
228
debug("cs0_bnds = 0x%08x\n",ddr->csbnds[0].csbnds);
229
debug("cs0_config = 0x%08x\n",ddr->cs_config[0]);
232
ddr->csbnds[1].csbnds = ( (banksize(spd.row_dens) >> 8)
233
| ((banksize(spd.row_dens) >> 23) - 1) );
234
ddr->cs_config[1] = ( 1<<31
237
| ((spd.nbanks == 8 ? 1 : 0) << 14)
238
| ((spd.nrow_addr - 12) << 8)
239
| (spd.ncol_addr - 8) );
240
debug("cs1_bnds = 0x%08x\n",ddr->csbnds[1].csbnds);
241
debug("cs1_config = 0x%08x\n",ddr->cs_config[1]);
245
ddr->csbnds[2].csbnds = (banksize(spd.row_dens) >> 24) - 1;
246
ddr->cs_config[2] = ( 1 << 31
249
| ((spd.nbanks == 8 ? 1 : 0) << 14)
250
| ((spd.nrow_addr - 12) << 8)
251
| (spd.ncol_addr - 8) );
253
debug("cs2_bnds = 0x%08x\n",ddr->csbnds[2].csbnds);
254
debug("cs2_config = 0x%08x\n",ddr->cs_config[2]);
257
ddr->csbnds[3].csbnds = ( (banksize(spd.row_dens) >> 8)
258
| ((banksize(spd.row_dens) >> 23) - 1) );
259
ddr->cs_config[3] = ( 1<<31
262
| ((spd.nbanks == 8 ? 1 : 0) << 14)
263
| ((spd.nrow_addr - 12) << 8)
264
| (spd.ncol_addr - 8) );
265
debug("cs3_bnds = 0x%08x\n",ddr->csbnds[3].csbnds);
266
debug("cs3_config = 0x%08x\n",ddr->cs_config[3]);
271
* Figure out memory size in Megabytes.
273
memsize = n_ranks * banksize(spd.row_dens) / 0x100000;
276
* First supported LAW size is 16M, at LAWAR_SIZE_16M == 23.
278
law_size = 19 + __ilog2(memsize);
281
* Set up LAWBAR for all of DDR.
283
ecm->bar = CONFIG_SYS_DDR_SDRAM_BASE & 0xfffff000;
284
ecm->ar = (LAWAR_EN | LAWAR_TRGT_IF_DDR | (LAWAR_SIZE & law_size));
285
debug("DDR:bar=0x%08x\n", ecm->bar);
286
debug("DDR:ar=0x%08x\n", ecm->ar);
289
* Find the largest CAS by locating the highest 1 bit
290
* in the spd.cas_lat field. Translate it to a DDR
291
* controller field value:
293
* CAS Lat DDR I DDR II Ctrl
294
* Clocks SPD Bit SPD Bit Value
295
* ------- ------- ------- -----
306
caslat = __ilog2(spd.cas_lat);
307
if ((spd.mem_type == SPD_MEMTYPE_DDR)
309
printf("DDR I: Invalid SPD CAS Latency: 0x%x.\n", spd.cas_lat);
311
} else if (spd.mem_type == SPD_MEMTYPE_DDR2
312
&& (caslat < 2 || caslat > 5)) {
313
printf("DDR II: Invalid SPD CAS Latency: 0x%x.\n",
317
debug("DDR: caslat SPD bit is %d\n", caslat);
319
max_bus_clk = 1000 *10 / (((spd.clk_cycle & 0xF0) >> 4) * 10
320
+ (spd.clk_cycle & 0x0f));
321
max_data_rate = max_bus_clk * 2;
323
debug("DDR:Module maximum data rate is: %d MHz\n", max_data_rate);
325
ddrc_clk = gd->mem_clk / 1000000;
326
effective_data_rate = 0;
328
if (max_data_rate >= 460) { /* it is DDR2-800, 667, 533 */
329
if (spd.cas_lat & 0x08)
333
if (ddrc_clk <= 460 && ddrc_clk > 350)
334
effective_data_rate = 400;
335
else if (ddrc_clk <=350 && ddrc_clk > 280)
336
effective_data_rate = 333;
337
else if (ddrc_clk <= 280 && ddrc_clk > 230)
338
effective_data_rate = 266;
340
effective_data_rate = 200;
341
} else if (max_data_rate >= 390 && max_data_rate < 460) { /* it is DDR 400 */
342
if (ddrc_clk <= 460 && ddrc_clk > 350) {
343
/* DDR controller clk at 350~460 */
344
effective_data_rate = 400; /* 5ns */
346
} else if (ddrc_clk <= 350 && ddrc_clk > 280) {
347
/* DDR controller clk at 280~350 */
348
effective_data_rate = 333; /* 6ns */
349
if (spd.clk_cycle2 == 0x60)
353
} else if (ddrc_clk <= 280 && ddrc_clk > 230) {
354
/* DDR controller clk at 230~280 */
355
effective_data_rate = 266; /* 7.5ns */
356
if (spd.clk_cycle3 == 0x75)
358
else if (spd.clk_cycle2 == 0x75)
362
} else if (ddrc_clk <= 230 && ddrc_clk > 90) {
363
/* DDR controller clk at 90~230 */
364
effective_data_rate = 200; /* 10ns */
365
if (spd.clk_cycle3 == 0xa0)
367
else if (spd.clk_cycle2 == 0xa0)
372
} else if (max_data_rate >= 323) { /* it is DDR 333 */
373
if (ddrc_clk <= 350 && ddrc_clk > 280) {
374
/* DDR controller clk at 280~350 */
375
effective_data_rate = 333; /* 6ns */
377
} else if (ddrc_clk <= 280 && ddrc_clk > 230) {
378
/* DDR controller clk at 230~280 */
379
effective_data_rate = 266; /* 7.5ns */
380
if (spd.clk_cycle2 == 0x75)
384
} else if (ddrc_clk <= 230 && ddrc_clk > 90) {
385
/* DDR controller clk at 90~230 */
386
effective_data_rate = 200; /* 10ns */
387
if (spd.clk_cycle3 == 0xa0)
389
else if (spd.clk_cycle2 == 0xa0)
394
} else if (max_data_rate >= 256) { /* it is DDR 266 */
395
if (ddrc_clk <= 350 && ddrc_clk > 280) {
396
/* DDR controller clk at 280~350 */
397
printf("DDR: DDR controller freq is more than "
398
"max data rate of the module\n");
400
} else if (ddrc_clk <= 280 && ddrc_clk > 230) {
401
/* DDR controller clk at 230~280 */
402
effective_data_rate = 266; /* 7.5ns */
404
} else if (ddrc_clk <= 230 && ddrc_clk > 90) {
405
/* DDR controller clk at 90~230 */
406
effective_data_rate = 200; /* 10ns */
407
if (spd.clk_cycle2 == 0xa0)
410
} else if (max_data_rate >= 190) { /* it is DDR 200 */
411
if (ddrc_clk <= 350 && ddrc_clk > 230) {
412
/* DDR controller clk at 230~350 */
413
printf("DDR: DDR controller freq is more than "
414
"max data rate of the module\n");
416
} else if (ddrc_clk <= 230 && ddrc_clk > 90) {
417
/* DDR controller clk at 90~230 */
418
effective_data_rate = 200; /* 10ns */
423
debug("DDR:Effective data rate is: %dMHz\n", effective_data_rate);
424
debug("DDR:The MSB 1 of CAS Latency is: %d\n", caslat);
427
* Errata DDR6 work around: input enable 2 cycles earlier.
428
* including MPC834x Rev1.0/1.1 and MPC8360 Rev1.1/1.2.
430
if(PVR_MAJ(pvr) <= 1 && spd.mem_type == SPD_MEMTYPE_DDR){
432
ddr->debug_reg = 0x201c0000; /* CL=2 */
433
else if (caslat == 3)
434
ddr->debug_reg = 0x202c0000; /* CL=2.5 */
435
else if (caslat == 4)
436
ddr->debug_reg = 0x202c0000; /* CL=3.0 */
438
__asm__ __volatile__ ("sync");
440
debug("Errata DDR6 (debug_reg=0x%08x)\n", ddr->debug_reg);
444
* Convert caslat clocks to DDR controller value.
445
* Force caslat_ctrl to be DDR Controller field-sized.
447
if (spd.mem_type == SPD_MEMTYPE_DDR) {
448
caslat_ctrl = (caslat + 1) & 0x07;
450
caslat_ctrl = (2 * caslat - 1) & 0x0f;
453
debug("DDR: effective data rate is %d MHz\n", effective_data_rate);
454
debug("DDR: caslat SPD bit is %d, controller field is 0x%x\n",
455
caslat, caslat_ctrl);
459
* Avoid writing for DDR I.
461
if (spd.mem_type == SPD_MEMTYPE_DDR2) {
462
unsigned char taxpd_clk = 8; /* By the book. */
463
unsigned char tmrd_clk = 2; /* By the book. */
464
unsigned char act_pd_exit = 2; /* Empirical? */
465
unsigned char pre_pd_exit = 6; /* Empirical? */
467
ddr->timing_cfg_0 = (0
468
| ((act_pd_exit & 0x7) << 20) /* ACT_PD_EXIT */
469
| ((pre_pd_exit & 0x7) << 16) /* PRE_PD_EXIT */
470
| ((taxpd_clk & 0xf) << 8) /* ODT_PD_EXIT */
471
| ((tmrd_clk & 0xf) << 0) /* MRS_CYC */
473
debug("DDR: timing_cfg_0 = 0x%08x\n", ddr->timing_cfg_0);
477
* For DDR I, WRREC(Twr) and WRTORD(Twtr) are not in SPD,
478
* use conservative value.
479
* For DDR II, they are bytes 36 and 37, in quarter nanos.
482
if (spd.mem_type == SPD_MEMTYPE_DDR) {
483
twr_clk = 3; /* Clocks */
484
twtr_clk = 1; /* Clocks */
486
twr_clk = picos_to_clk(spd.twr * 250);
487
twtr_clk = picos_to_clk(spd.twtr * 250);
493
* Calculate Trfc, in picos.
494
* DDR I: Byte 42 straight up in ns.
495
* DDR II: Byte 40 and 42 swizzled some, in ns.
497
if (spd.mem_type == SPD_MEMTYPE_DDR) {
498
trfc = spd.trfc * 1000; /* up to ps */
500
unsigned int byte40_table_ps[8] = {
511
trfc = (((spd.trctrfc_ext & 0x1) * 256) + spd.trfc) * 1000
512
+ byte40_table_ps[(spd.trctrfc_ext >> 1) & 0x7];
514
trfc_clk = picos_to_clk(trfc);
517
* Trcd, Byte 29, from quarter nanos to ps and clocks.
519
trcd_clk = picos_to_clk(spd.trcd * 250) & 0x7;
522
* Convert trfc_clk to DDR controller fields. DDR I should
523
* fit in the REFREC field (16-19) of TIMING_CFG_1, but the
524
* 83xx controller has an extended REFREC field of three bits.
525
* The controller automatically adds 8 clocks to this value,
526
* so preadjust it down 8 first before splitting it up.
528
trfc_low = (trfc_clk - 8) & 0xf;
531
(((picos_to_clk(spd.trp * 250) & 0x07) << 28 ) | /* PRETOACT */
532
((picos_to_clk(spd.tras * 1000) & 0x0f ) << 24 ) | /* ACTTOPRE */
533
(trcd_clk << 20 ) | /* ACTTORW */
534
(caslat_ctrl << 16 ) | /* CASLAT */
535
(trfc_low << 12 ) | /* REFEC */
536
((twr_clk & 0x07) << 8) | /* WRRREC */
537
((picos_to_clk(spd.trrd * 250) & 0x07) << 4) | /* ACTTOACT */
538
((twtr_clk & 0x07) << 0) /* WRTORD */
544
* For DDR II, with ODT enabled, use "a value" less than ACTTORW,
545
* which comes from Trcd, and also note that:
546
* add_lat + caslat must be >= 4
549
if (spd.mem_type == SPD_MEMTYPE_DDR2
550
&& (odt_wr_cfg || odt_rd_cfg)
552
add_lat = 4 - caslat;
553
if ((add_lat + caslat) < 4) {
560
* Historically 0x2 == 4/8 clock delay.
561
* Empirically, 0x3 == 6/8 clock delay is suggested for DDR I 266.
564
#ifdef CONFIG_SYS_DDR_WRITE_DATA_DELAY
565
wr_data_delay = CONFIG_SYS_DDR_WRITE_DATA_DELAY;
571
* Minimum CKE Pulse Width.
572
* Four Activate Window
574
if (spd.mem_type == SPD_MEMTYPE_DDR) {
576
* This is a lie. It should really be 1, but if it is
577
* set to 1, bits overlap into the old controller's
578
* otherwise unused ACSM field. If we leave it 0, then
579
* the HW will magically treat it as 1 for DDR 1. Oh Yea.
583
trtp_clk = 2; /* By the book. */
584
cke_min_clk = 1; /* By the book. */
585
four_act = 1; /* By the book. */
590
/* Convert SPD value from quarter nanos to picos. */
591
trtp_clk = picos_to_clk(spd.trtp * 250);
596
cke_min_clk = 3; /* By the book. */
597
four_act = picos_to_clk(37500); /* By the book. 1k pages? */
601
* Empirically set ~MCAS-to-preamble override for DDR 2.
602
* Your milage will vary.
605
if (spd.mem_type == SPD_MEMTYPE_DDR2) {
606
#ifdef CONFIG_SYS_DDR_CPO
607
cpo = CONFIG_SYS_DDR_CPO;
609
if (effective_data_rate == 266) {
610
cpo = 0x4; /* READ_LAT + 1/2 */
611
} else if (effective_data_rate == 333) {
612
cpo = 0x6; /* READ_LAT + 1 */
613
} else if (effective_data_rate == 400) {
614
cpo = 0x7; /* READ_LAT + 5/4 */
616
/* Automatic calibration */
622
ddr->timing_cfg_2 = (0
623
| ((add_lat & 0x7) << 28) /* ADD_LAT */
624
| ((cpo & 0x1f) << 23) /* CPO */
625
| ((wr_lat & 0x7) << 19) /* WR_LAT */
626
| ((trtp_clk & 0x7) << 13) /* RD_TO_PRE */
627
| ((wr_data_delay & 0x7) << 10) /* WR_DATA_DELAY */
628
| ((cke_min_clk & 0x7) << 6) /* CKE_PLS */
629
| ((four_act & 0x1f) << 0) /* FOUR_ACT */
632
debug("DDR:timing_cfg_1=0x%08x\n", ddr->timing_cfg_1);
633
debug("DDR:timing_cfg_2=0x%08x\n", ddr->timing_cfg_2);
635
/* Check DIMM data bus width */
636
if (spd.dataw_lsb < 64) {
637
if (spd.mem_type == SPD_MEMTYPE_DDR)
638
burstlen = 0x03; /* 32 bit data bus, burst len is 8 */
640
burstlen = 0x02; /* 32 bit data bus, burst len is 4 */
641
debug("\n DDR DIMM: data bus width is 32 bit");
643
burstlen = 0x02; /* Others act as 64 bit bus, burst len is 4 */
644
debug("\n DDR DIMM: data bus width is 64 bit");
647
/* Is this an ECC DDR chip? */
648
if (spd.config == 0x02)
649
debug(" with ECC\n");
651
debug(" without ECC\n");
653
/* Burst length is always 4 for 64 bit data bus, 8 for 32 bit data bus,
654
Burst type is sequential
656
if (spd.mem_type == SPD_MEMTYPE_DDR) {
659
ddr->sdram_mode = 0x50 | burstlen; /* CL=1.5 */
662
ddr->sdram_mode = 0x20 | burstlen; /* CL=2.0 */
665
ddr->sdram_mode = 0x60 | burstlen; /* CL=2.5 */
668
ddr->sdram_mode = 0x30 | burstlen; /* CL=3.0 */
671
printf("DDR:only CL 1.5, 2.0, 2.5, 3.0 is supported\n");
675
mode_odt_enable = 0x0; /* Default disabled */
676
if (odt_wr_cfg || odt_rd_cfg) {
678
* Bits 6 and 2 in Extended MRS(1)
679
* Bit 2 == 0x04 == 75 Ohm, with 2 DIMM modules.
680
* Bit 6 == 0x40 == 150 Ohm, with 1 DIMM module.
682
mode_odt_enable = 0x40; /* 150 Ohm */
687
| (1 << (16 + 10)) /* DQS Differential disable */
688
#ifdef CONFIG_SYS_DDR_MODE_WEAK
689
| (1 << (16 + 1)) /* weak driver (~60%) */
691
| (add_lat << (16 + 3)) /* Additive Latency in EMRS1 */
692
| (mode_odt_enable << 16) /* ODT Enable in EMRS1 */
693
| ((twr_clk - 1) << 9) /* Write Recovery Autopre */
694
| (caslat << 4) /* caslat */
695
| (burstlen << 0) /* Burst length */
698
debug("DDR:sdram_mode=0x%08x\n", ddr->sdram_mode);
701
* Clear EMRS2 and EMRS3.
703
ddr->sdram_mode2 = 0;
704
debug("DDR: sdram_mode2 = 0x%08x\n", ddr->sdram_mode2);
706
switch (spd.refresh) {
709
refresh_clk = picos_to_clk(15625000);
713
refresh_clk = picos_to_clk(3900000);
717
refresh_clk = picos_to_clk(7800000);
721
refresh_clk = picos_to_clk(31300000);
725
refresh_clk = picos_to_clk(62500000);
729
refresh_clk = picos_to_clk(125000000);
737
* Set BSTOPRE to 0x100 for page mode
738
* If auto-charge is used, set BSTOPRE = 0
740
ddr->sdram_interval = ((refresh_clk & 0x3fff) << 16) | 0x100;
741
debug("DDR:sdram_interval=0x%08x\n", ddr->sdram_interval);
747
#ifndef CONFIG_NEVER_ASSERT_ODT_TO_CPU
748
if (odt_rd_cfg | odt_wr_cfg) {
749
odt_cfg = 0x2; /* ODT to IOs during reads */
752
if (spd.mem_type == SPD_MEMTYPE_DDR2) {
754
| (0 << 26) /* True DQS */
755
| (odt_cfg << 21) /* ODT only read */
756
| (1 << 12) /* 1 refresh at a time */
759
debug("DDR: sdram_cfg2 = 0x%08x\n", ddr->sdram_cfg2);
762
#ifdef CONFIG_SYS_DDR_SDRAM_CLK_CNTL /* Optional platform specific value */
763
ddr->sdram_clk_cntl = CONFIG_SYS_DDR_SDRAM_CLK_CNTL;
765
debug("DDR:sdram_clk_cntl=0x%08x\n", ddr->sdram_clk_cntl);
772
* Figure out the settings for the sdram_cfg register. Build up
773
* the value in 'sdram_cfg' before writing since the write into
774
* the register will actually enable the memory controller, and all
775
* settings must be done before enabling.
777
* sdram_cfg[0] = 1 (ddr sdram logic enable)
778
* sdram_cfg[1] = 1 (self-refresh-enable)
779
* sdram_cfg[5:7] = (SDRAM type = DDR SDRAM)
782
* sdram_cfg[12] = 0 (32_BE =0 , 64 bit bus mode)
783
* sdram_cfg[13] = 0 (8_BE =0, 4-beat bursts)
785
if (spd.mem_type == SPD_MEMTYPE_DDR)
786
sdram_type = SDRAM_CFG_SDRAM_TYPE_DDR1;
788
sdram_type = SDRAM_CFG_SDRAM_TYPE_DDR2;
791
| SDRAM_CFG_MEM_EN /* DDR enable */
792
| SDRAM_CFG_SREN /* Self refresh */
793
| sdram_type /* SDRAM type */
796
/* sdram_cfg[3] = RD_EN - registered DIMM enable */
797
if (spd.mod_attr & 0x02)
798
sdram_cfg |= SDRAM_CFG_RD_EN;
800
/* The DIMM is 32bit width */
801
if (spd.dataw_lsb < 64) {
802
if (spd.mem_type == SPD_MEMTYPE_DDR)
803
sdram_cfg |= SDRAM_CFG_32_BE | SDRAM_CFG_8_BE;
804
if (spd.mem_type == SPD_MEMTYPE_DDR2)
805
sdram_cfg |= SDRAM_CFG_32_BE;
810
#if defined(CONFIG_DDR_ECC)
811
/* Enable ECC with sdram_cfg[2] */
812
if (spd.config == 0x02) {
813
sdram_cfg |= 0x20000000;
815
/* disable error detection */
816
ddr->err_disable = ~ECC_ERROR_ENABLE;
817
/* set single bit error threshold to maximum value,
818
* reset counter to zero */
819
ddr->err_sbe = (255 << ECC_ERROR_MAN_SBET_SHIFT) |
820
(0 << ECC_ERROR_MAN_SBEC_SHIFT);
823
debug("DDR:err_disable=0x%08x\n", ddr->err_disable);
824
debug("DDR:err_sbe=0x%08x\n", ddr->err_sbe);
826
debug(" DDRC ECC mode: %s\n", ddrc_ecc_enable ? "ON":"OFF");
828
#if defined(CONFIG_DDR_2T_TIMING)
830
* Enable 2T timing by setting sdram_cfg[16].
832
sdram_cfg |= SDRAM_CFG_2T_EN;
834
/* Enable controller, and GO! */
835
ddr->sdram_cfg = sdram_cfg;
839
debug("DDR:sdram_cfg=0x%08x\n", ddr->sdram_cfg);
840
return memsize; /*in MBytes*/
842
#endif /* CONFIG_SPD_EEPROM */
844
#if defined(CONFIG_DDR_ECC) && !defined(CONFIG_ECC_INIT_VIA_DDRCONTROLLER)
846
* Use timebase counter, get_timer() is not availabe
847
* at this point of initialization yet.
849
static __inline__ unsigned long get_tbms (void)
852
unsigned long tbu1, tbu2;
854
unsigned long long tmp;
856
ulong tbclk = get_tbclk();
858
/* get the timebase ticks */
860
asm volatile ("mftbu %0":"=r" (tbu1):);
861
asm volatile ("mftb %0":"=r" (tbl):);
862
asm volatile ("mftbu %0":"=r" (tbu2):);
863
} while (tbu1 != tbu2);
865
/* convert ticks to ms */
866
tmp = (unsigned long long)(tbu1);
868
tmp += (unsigned long long)(tbl);
869
ms = tmp/(tbclk/1000);
875
* Initialize all of memory for ECC, then enable errors.
877
void ddr_enable_ecc(unsigned int dram_size)
879
volatile immap_t *immap = (immap_t *)CONFIG_SYS_IMMR;
880
volatile ddr83xx_t *ddr= &immap->ddr;
881
unsigned long t_start, t_end;
884
unsigned int pattern[2];
887
t_start = get_tbms();
888
pattern[0] = 0xdeadbeef;
889
pattern[1] = 0xdeadbeef;
891
#if defined(CONFIG_DDR_ECC_INIT_VIA_DMA)
892
dma_meminit(pattern[0], dram_size);
894
debug("ddr init: CPU FP write method\n");
896
for (p = 0; p < (u64*)(size); p++) {
897
ppcDWstore((u32*)p, pattern);
899
__asm__ __volatile__ ("sync");
905
debug("\nREADY!!\n");
906
debug("ddr init duration: %ld ms\n", t_end - t_start);
908
/* Clear All ECC Errors */
909
if ((ddr->err_detect & ECC_ERROR_DETECT_MME) == ECC_ERROR_DETECT_MME)
910
ddr->err_detect |= ECC_ERROR_DETECT_MME;
911
if ((ddr->err_detect & ECC_ERROR_DETECT_MBE) == ECC_ERROR_DETECT_MBE)
912
ddr->err_detect |= ECC_ERROR_DETECT_MBE;
913
if ((ddr->err_detect & ECC_ERROR_DETECT_SBE) == ECC_ERROR_DETECT_SBE)
914
ddr->err_detect |= ECC_ERROR_DETECT_SBE;
915
if ((ddr->err_detect & ECC_ERROR_DETECT_MSE) == ECC_ERROR_DETECT_MSE)
916
ddr->err_detect |= ECC_ERROR_DETECT_MSE;
918
/* Disable ECC-Interrupts */
919
ddr->err_int_en &= ECC_ERR_INT_DISABLE;
921
/* Enable errors for ECC */
922
ddr->err_disable &= ECC_ERROR_ENABLE;
924
__asm__ __volatile__ ("sync");
925
__asm__ __volatile__ ("isync");
927
#endif /* CONFIG_DDR_ECC */