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powerpc/mpc8xxx: Add x4 DDR device support
[thirdparty/u-boot.git] / arch / powerpc / cpu / mpc8xxx / ddr / main.c
CommitLineData
58e5e9af 1/*
a4c66509 2 * Copyright 2008-2012 Freescale Semiconductor, Inc.
58e5e9af
KG		 3 *
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License
6 * Version 2 as published by the Free Software Foundation.
7 */
8
9/*
10 * Generic driver for Freescale DDR/DDR2/DDR3 memory controller.
11 * Based on code from spd_sdram.c
12 * Author: James Yang [at freescale.com]
13 */
14
15#include <common.h>
c39f44dc 16#include <i2c.h>
58e5e9af 17#include <asm/fsl_ddr_sdram.h>
a4c66509 18#include <asm/fsl_law.h>
58e5e9af
KG		 19
20#include "ddr.h"
21
a4c66509 22void fsl_ddr_set_lawbar(
58e5e9af
KG		 23 const common_timing_params_t *memctl_common_params,
24 unsigned int memctl_interleaved,
25 unsigned int ctrl_num);
a4c66509 26void fsl_ddr_set_intl3r(const unsigned int granule_size);
58e5e9af
KG		 27
28/* processor specific function */
29extern void fsl_ddr_set_memctl_regs(const fsl_ddr_cfg_regs_t *regs,
30 unsigned int ctrl_num);
31
c39f44dc
KG		 32#if defined(SPD_EEPROM_ADDRESS) || \
33 defined(SPD_EEPROM_ADDRESS1) || defined(SPD_EEPROM_ADDRESS2) || \
34 defined(SPD_EEPROM_ADDRESS3) || defined(SPD_EEPROM_ADDRESS4)
35#if (CONFIG_NUM_DDR_CONTROLLERS == 1) && (CONFIG_DIMM_SLOTS_PER_CTLR == 1)
36u8 spd_i2c_addr[CONFIG_NUM_DDR_CONTROLLERS][CONFIG_DIMM_SLOTS_PER_CTLR] = {
37 [0][0] = SPD_EEPROM_ADDRESS,
38};
639f330f
YS		 39#elif (CONFIG_NUM_DDR_CONTROLLERS == 1) && (CONFIG_DIMM_SLOTS_PER_CTLR == 2)
40u8 spd_i2c_addr[CONFIG_NUM_DDR_CONTROLLERS][CONFIG_DIMM_SLOTS_PER_CTLR] = {
41 [0][0] = SPD_EEPROM_ADDRESS1, /* controller 1 */
42 [0][1] = SPD_EEPROM_ADDRESS2, /* controller 1 */
43};
44#elif (CONFIG_NUM_DDR_CONTROLLERS == 2) && (CONFIG_DIMM_SLOTS_PER_CTLR == 1)
c39f44dc
KG		 45u8 spd_i2c_addr[CONFIG_NUM_DDR_CONTROLLERS][CONFIG_DIMM_SLOTS_PER_CTLR] = {
46 [0][0] = SPD_EEPROM_ADDRESS1, /* controller 1 */
47 [1][0] = SPD_EEPROM_ADDRESS2, /* controller 2 */
48};
639f330f 49#elif (CONFIG_NUM_DDR_CONTROLLERS == 2) && (CONFIG_DIMM_SLOTS_PER_CTLR == 2)
c39f44dc
KG		 50u8 spd_i2c_addr[CONFIG_NUM_DDR_CONTROLLERS][CONFIG_DIMM_SLOTS_PER_CTLR] = {
51 [0][0] = SPD_EEPROM_ADDRESS1, /* controller 1 */
52 [0][1] = SPD_EEPROM_ADDRESS2, /* controller 1 */
53 [1][0] = SPD_EEPROM_ADDRESS3, /* controller 2 */
54 [1][1] = SPD_EEPROM_ADDRESS4, /* controller 2 */
55};
a4c66509
YS		 56#elif (CONFIG_NUM_DDR_CONTROLLERS == 3) && (CONFIG_DIMM_SLOTS_PER_CTLR == 1)
57u8 spd_i2c_addr[CONFIG_NUM_DDR_CONTROLLERS][CONFIG_DIMM_SLOTS_PER_CTLR] = {
58 [0][0] = SPD_EEPROM_ADDRESS1, /* controller 1 */
59 [1][0] = SPD_EEPROM_ADDRESS2, /* controller 2 */
60 [2][0] = SPD_EEPROM_ADDRESS3, /* controller 3 */
61};
62#elif (CONFIG_NUM_DDR_CONTROLLERS == 3) && (CONFIG_DIMM_SLOTS_PER_CTLR == 2)
63u8 spd_i2c_addr[CONFIG_NUM_DDR_CONTROLLERS][CONFIG_DIMM_SLOTS_PER_CTLR] = {
64 [0][0] = SPD_EEPROM_ADDRESS1, /* controller 1 */
65 [0][1] = SPD_EEPROM_ADDRESS2, /* controller 1 */
66 [1][0] = SPD_EEPROM_ADDRESS3, /* controller 2 */
67 [1][1] = SPD_EEPROM_ADDRESS4, /* controller 2 */
68 [2][0] = SPD_EEPROM_ADDRESS5, /* controller 3 */
69 [2][1] = SPD_EEPROM_ADDRESS6, /* controller 3 */
70};
71
c39f44dc
KG		 72#endif
73
74static void __get_spd(generic_spd_eeprom_t *spd, u8 i2c_address)
75{
76 int ret = i2c_read(i2c_address, 0, 1, (uchar *)spd,
77 sizeof(generic_spd_eeprom_t));
78
79 if (ret) {
82968a7a
YS		 80 if (i2c_address ==
81#ifdef SPD_EEPROM_ADDRESS
82 SPD_EEPROM_ADDRESS
83#elif defined(SPD_EEPROM_ADDRESS1)
84 SPD_EEPROM_ADDRESS1
85#endif
86 ) {
87 printf("DDR: failed to read SPD from address %u\n",
88 i2c_address);
89 } else {
90 debug("DDR: failed to read SPD from address %u\n",
91 i2c_address);
92 }
c39f44dc
KG		 93 memset(spd, 0, sizeof(generic_spd_eeprom_t));
94 }
95}
96
97__attribute__((weak, alias("__get_spd")))
98void get_spd(generic_spd_eeprom_t *spd, u8 i2c_address);
99
100void fsl_ddr_get_spd(generic_spd_eeprom_t *ctrl_dimms_spd,
101 unsigned int ctrl_num)
102{
103 unsigned int i;
104 unsigned int i2c_address = 0;
105
106 if (ctrl_num >= CONFIG_NUM_DDR_CONTROLLERS) {
107 printf("%s unexpected ctrl_num = %u\n", __FUNCTION__, ctrl_num);
108 return;
109 }
110
111 for (i = 0; i < CONFIG_DIMM_SLOTS_PER_CTLR; i++) {
112 i2c_address = spd_i2c_addr[ctrl_num][i];
113 get_spd(&(ctrl_dimms_spd[i]), i2c_address);
114 }
115}
116#else
117void fsl_ddr_get_spd(generic_spd_eeprom_t *ctrl_dimms_spd,
118 unsigned int ctrl_num)
119{
120}
121#endif /* SPD_EEPROM_ADDRESSx */
58e5e9af
KG		 122
123/*
124 * ASSUMPTIONS:
125 * - Same number of CONFIG_DIMM_SLOTS_PER_CTLR on each controller
126 * - Same memory data bus width on all controllers
127 *
128 * NOTES:
129 *
130 * The memory controller and associated documentation use confusing
131 * terminology when referring to the orgranization of DRAM.
132 *
133 * Here is a terminology translation table:
134 *
135 * memory controller/documention |industry |this code |signals
136 * -------------------------------|-----------|-----------|-----------------
f12e4549
WD		 137 * physical bank/bank |rank |rank |chip select (CS)
138 * logical bank/sub-bank |bank |bank |bank address (BA)
139 * page/row |row |page |row address
140 * ??? |column |column |column address
58e5e9af
KG		 141 *
142 * The naming confusion is further exacerbated by the descriptions of the
143 * memory controller interleaving feature, where accesses are interleaved
144 * _BETWEEN_ two seperate memory controllers. This is configured only in
145 * CS0_CONFIG[INTLV_CTL] of each memory controller.
146 *
147 * memory controller documentation | number of chip selects
f12e4549 148 * | per memory controller supported
58e5e9af 149 * --------------------------------|-----------------------------------------
f12e4549
WD		 150 * cache line interleaving | 1 (CS0 only)
151 * page interleaving | 1 (CS0 only)
152 * bank interleaving | 1 (CS0 only)
153 * superbank interleraving | depends on bank (chip select)
154 * | interleraving [rank interleaving]
155 * | mode used on every memory controller
58e5e9af
KG		 156 *
157 * Even further confusing is the existence of the interleaving feature
158 * _WITHIN_ each memory controller. The feature is referred to in
159 * documentation as chip select interleaving or bank interleaving,
160 * although it is configured in the DDR_SDRAM_CFG field.
161 *
f12e4549 162 * Name of field | documentation name | this code
58e5e9af 163 * -----------------------------|-----------------------|------------------
f12e4549
WD		 164 * DDR_SDRAM_CFG[BA_INTLV_CTL] | Bank (chip select) | rank interleaving
165 * | interleaving
58e5e9af
KG		 166 */
167
58e5e9af
KG		 168const char *step_string_tbl[] = {
169 "STEP_GET_SPD",
170 "STEP_COMPUTE_DIMM_PARMS",
171 "STEP_COMPUTE_COMMON_PARMS",
172 "STEP_GATHER_OPTS",
173 "STEP_ASSIGN_ADDRESSES",
174 "STEP_COMPUTE_REGS",
175 "STEP_PROGRAM_REGS",
176 "STEP_ALL"
177};
178
179const char * step_to_string(unsigned int step) {
180
181 unsigned int s = __ilog2(step);
182
183 if ((1 << s) != step)
184 return step_string_tbl[7];
185
186 return step_string_tbl[s];
187}
58e5e9af 188
ef002275 189static unsigned long long __step_assign_addresses(fsl_ddr_info_t *pinfo,
a4c66509 190 unsigned int dbw_cap_adj[])
58e5e9af
KG		 191{
192 int i, j;
a4c66509
YS		 193 unsigned long long total_mem, current_mem_base, total_ctlr_mem;
194 unsigned long long rank_density, ctlr_density = 0;
58e5e9af
KG		 195
196 /*
197 * If a reduced data width is requested, but the SPD
198 * specifies a physically wider device, adjust the
199 * computed dimm capacities accordingly before
200 * assigning addresses.
201 */
202 for (i = 0; i < CONFIG_NUM_DDR_CONTROLLERS; i++) {
203 unsigned int found = 0;
204
205 switch (pinfo->memctl_opts[i].data_bus_width) {
206 case 2:
207 /* 16-bit */
51d498f1
YS		 208 for (j = 0; j < CONFIG_DIMM_SLOTS_PER_CTLR; j++) {
209 unsigned int dw;
210 if (!pinfo->dimm_params[i][j].n_ranks)
211 continue;
212 dw = pinfo->dimm_params[i][j].primary_sdram_width;
213 if ((dw == 72 || dw == 64)) {
214 dbw_cap_adj[i] = 2;
215 break;
216 } else if ((dw == 40 || dw == 32)) {
217 dbw_cap_adj[i] = 1;
218 break;
219 }
220 }
58e5e9af
KG		 221 break;
222
223 case 1:
224 /* 32-bit */
225 for (j = 0; j < CONFIG_DIMM_SLOTS_PER_CTLR; j++) {
226 unsigned int dw;
227 dw = pinfo->dimm_params[i][j].data_width;
228 if (pinfo->dimm_params[i][j].n_ranks
229 && (dw == 72 || dw == 64)) {
230 /*
231 * FIXME: can't really do it
232 * like this because this just
233 * further reduces the memory
234 */
235 found = 1;
236 break;
237 }
238 }
239 if (found) {
240 dbw_cap_adj[i] = 1;
241 }
242 break;
243
244 case 0:
245 /* 64-bit */
246 break;
247
248 default:
249 printf("unexpected data bus width "
250 "specified controller %u\n", i);
251 return 1;
252 }
a4c66509 253 debug("dbw_cap_adj[%d]=%d\n", i, dbw_cap_adj[i]);
58e5e9af
KG		 254 }
255
a4c66509
YS		 256 current_mem_base = 0ull;
257 total_mem = 0;
258 if (pinfo->memctl_opts[0].memctl_interleaving) {
259 rank_density = pinfo->dimm_params[0][0].rank_density >>
260 dbw_cap_adj[0];
261 switch (pinfo->memctl_opts[0].ba_intlv_ctl &
262 FSL_DDR_CS0_CS1_CS2_CS3) {
263 case FSL_DDR_CS0_CS1_CS2_CS3:
264 ctlr_density = 4 * rank_density;
265 break;
266 case FSL_DDR_CS0_CS1:
267 case FSL_DDR_CS0_CS1_AND_CS2_CS3:
268 ctlr_density = 2 * rank_density;
269 break;
270 case FSL_DDR_CS2_CS3:
271 default:
272 ctlr_density = rank_density;
273 break;
274 }
275 debug("rank density is 0x%llx, ctlr density is 0x%llx\n",
276 rank_density, ctlr_density);
58e5e9af 277 for (i = 0; i < CONFIG_NUM_DDR_CONTROLLERS; i++) {
a4c66509
YS		 278 if (pinfo->memctl_opts[i].memctl_interleaving) {
279 switch (pinfo->memctl_opts[i].memctl_interleaving_mode) {
280 case FSL_DDR_CACHE_LINE_INTERLEAVING:
281 case FSL_DDR_PAGE_INTERLEAVING:
282 case FSL_DDR_BANK_INTERLEAVING:
283 case FSL_DDR_SUPERBANK_INTERLEAVING:
284 total_ctlr_mem = 2 * ctlr_density;
285 break;
286 case FSL_DDR_3WAY_1KB_INTERLEAVING:
287 case FSL_DDR_3WAY_4KB_INTERLEAVING:
288 case FSL_DDR_3WAY_8KB_INTERLEAVING:
289 total_ctlr_mem = 3 * ctlr_density;
290 break;
291 case FSL_DDR_4WAY_1KB_INTERLEAVING:
292 case FSL_DDR_4WAY_4KB_INTERLEAVING:
293 case FSL_DDR_4WAY_8KB_INTERLEAVING:
294 total_ctlr_mem = 4 * ctlr_density;
295 break;
296 default:
297 panic("Unknown interleaving mode");
298 }
299 pinfo->common_timing_params[i].base_address =
300 current_mem_base;
301 pinfo->common_timing_params[i].total_mem =
302 total_ctlr_mem;
303 total_mem = current_mem_base + total_ctlr_mem;
304 debug("ctrl %d base 0x%llx\n", i, current_mem_base);
305 debug("ctrl %d total 0x%llx\n", i, total_ctlr_mem);
306 } else {
307 /* when 3rd controller not interleaved */
308 current_mem_base = total_mem;
309 total_ctlr_mem = 0;
310 pinfo->common_timing_params[i].base_address =
311 current_mem_base;
312 for (j = 0; j < CONFIG_DIMM_SLOTS_PER_CTLR; j++) {
313 unsigned long long cap =
314 pinfo->dimm_params[i][j].capacity >> dbw_cap_adj[i];
315 pinfo->dimm_params[i][j].base_address =
316 current_mem_base;
317 debug("ctrl %d dimm %d base 0x%llx\n", i, j, current_mem_base);
318 current_mem_base += cap;
319 total_ctlr_mem += cap;
320 }
321 debug("ctrl %d total 0x%llx\n", i, total_ctlr_mem);
322 pinfo->common_timing_params[i].total_mem =
323 total_ctlr_mem;
324 total_mem += total_ctlr_mem;
58e5e9af
KG		 325 }
326 }
327 } else {
328 /*
329 * Simple linear assignment if memory
330 * controllers are not interleaved.
331 */
58e5e9af 332 for (i = 0; i < CONFIG_NUM_DDR_CONTROLLERS; i++) {
a4c66509 333 total_ctlr_mem = 0;
58e5e9af 334 pinfo->common_timing_params[i].base_address =
a4c66509 335 current_mem_base;
58e5e9af
KG		 336 for (j = 0; j < CONFIG_DIMM_SLOTS_PER_CTLR; j++) {
337 /* Compute DIMM base addresses. */
338 unsigned long long cap =
a4c66509 339 pinfo->dimm_params[i][j].capacity >> dbw_cap_adj[i];
58e5e9af 340 pinfo->dimm_params[i][j].base_address =
a4c66509
YS		 341 current_mem_base;
342 debug("ctrl %d dimm %d base 0x%llx\n", i, j, current_mem_base);
343 current_mem_base += cap;
344 total_ctlr_mem += cap;
58e5e9af 345 }
a4c66509 346 debug("ctrl %d total 0x%llx\n", i, total_ctlr_mem);
58e5e9af 347 pinfo->common_timing_params[i].total_mem =
a4c66509
YS		 348 total_ctlr_mem;
349 total_mem += total_ctlr_mem;
58e5e9af
KG		 350 }
351 }
a4c66509 352 debug("Total mem by %s is 0x%llx\n", __func__, total_mem);
58e5e9af 353
a4c66509 354 return total_mem;
58e5e9af
KG		 355}
356
ef002275
YS		 357/* Use weak function to allow board file to override the address assignment */
358__attribute__((weak, alias("__step_assign_addresses")))
359unsigned long long step_assign_addresses(fsl_ddr_info_t *pinfo,
360 unsigned int dbw_cap_adj[]);
361
e7563aff 362unsigned long long
fc0c2b6f
HW		 363fsl_ddr_compute(fsl_ddr_info_t *pinfo, unsigned int start_step,
364 unsigned int size_only)
58e5e9af
KG		 365{
366 unsigned int i, j;
e7563aff 367 unsigned long long total_mem = 0;
58e5e9af
KG		 368
369 fsl_ddr_cfg_regs_t *ddr_reg = pinfo->fsl_ddr_config_reg;
370 common_timing_params_t *timing_params = pinfo->common_timing_params;
371
372 /* data bus width capacity adjust shift amount */
373 unsigned int dbw_capacity_adjust[CONFIG_NUM_DDR_CONTROLLERS];
374
375 for (i = 0; i < CONFIG_NUM_DDR_CONTROLLERS; i++) {
376 dbw_capacity_adjust[i] = 0;
377 }
378
379 debug("starting at step %u (%s)\n",
380 start_step, step_to_string(start_step));
381
382 switch (start_step) {
383 case STEP_GET_SPD:
1b3e3c4f 384#if defined(CONFIG_DDR_SPD) || defined(CONFIG_SPD_EEPROM)
58e5e9af
KG		 385 /* STEP 1: Gather all DIMM SPD data */
386 for (i = 0; i < CONFIG_NUM_DDR_CONTROLLERS; i++) {
387 fsl_ddr_get_spd(pinfo->spd_installed_dimms[i], i);
388 }
389
390 case STEP_COMPUTE_DIMM_PARMS:
391 /* STEP 2: Compute DIMM parameters from SPD data */
392
393 for (i = 0; i < CONFIG_NUM_DDR_CONTROLLERS; i++) {
394 for (j = 0; j < CONFIG_DIMM_SLOTS_PER_CTLR; j++) {
395 unsigned int retval;
396 generic_spd_eeprom_t *spd =
397 &(pinfo->spd_installed_dimms[i][j]);
398 dimm_params_t *pdimm =
f12e4549 399 &(pinfo->dimm_params[i][j]);
58e5e9af
KG		 400
401 retval = compute_dimm_parameters(spd, pdimm, i);
f2d264b6 402#ifdef CONFIG_SYS_DDR_RAW_TIMING
62f739fe 403 if (!i && !j && retval) {
a4c66509
YS		 404 printf("SPD error on controller %d! "
405 "Trying fallback to raw timing "
406 "calculation\n", i);
f2d264b6
YS		 407 fsl_ddr_get_dimm_params(pdimm, i, j);
408 }
409#else
58e5e9af
KG		 410 if (retval == 2) {
411 printf("Error: compute_dimm_parameters"
412 " non-zero returned FATAL value "
413 "for memctl=%u dimm=%u\n", i, j);
414 return 0;
415 }
f2d264b6 416#endif
58e5e9af
KG		 417 if (retval) {
418 debug("Warning: compute_dimm_parameters"
419 " non-zero return value for memctl=%u "
420 "dimm=%u\n", i, j);
421 }
422 }
423 }
424
98de369b 425#elif defined(CONFIG_SYS_DDR_RAW_TIMING)
1b3e3c4f
YS		 426 case STEP_COMPUTE_DIMM_PARMS:
427 for (i = 0; i < CONFIG_NUM_DDR_CONTROLLERS; i++) {
428 for (j = 0; j < CONFIG_DIMM_SLOTS_PER_CTLR; j++) {
429 dimm_params_t *pdimm =
430 &(pinfo->dimm_params[i][j]);
431 fsl_ddr_get_dimm_params(pdimm, i, j);
432 }
433 }
434 debug("Filling dimm parameters from board specific file\n");
435#endif
58e5e9af
KG		 436 case STEP_COMPUTE_COMMON_PARMS:
437 /*
438 * STEP 3: Compute a common set of timing parameters
439 * suitable for all of the DIMMs on each memory controller
440 */
441 for (i = 0; i < CONFIG_NUM_DDR_CONTROLLERS; i++) {
442 debug("Computing lowest common DIMM"
443 " parameters for memctl=%u\n", i);
444 compute_lowest_common_dimm_parameters(
445 pinfo->dimm_params[i],
446 &timing_params[i],
447 CONFIG_DIMM_SLOTS_PER_CTLR);
448 }
449
450 case STEP_GATHER_OPTS:
451 /* STEP 4: Gather configuration requirements from user */
452 for (i = 0; i < CONFIG_NUM_DDR_CONTROLLERS; i++) {
453 debug("Reloading memory controller "
454 "configuration options for memctl=%u\n", i);
455 /*
456 * This "reloads" the memory controller options
457 * to defaults. If the user "edits" an option,
458 * next_step points to the step after this,
459 * which is currently STEP_ASSIGN_ADDRESSES.
460 */
461 populate_memctl_options(
462 timing_params[i].all_DIMMs_registered,
dfb49108
HW		 463 &pinfo->memctl_opts[i],
464 pinfo->dimm_params[i], i);
58e5e9af 465 }
58e5e9af
KG		 466 case STEP_ASSIGN_ADDRESSES:
467 /* STEP 5: Assign addresses to chip selects */
a4c66509
YS		 468 check_interleaving_options(pinfo);
469 total_mem = step_assign_addresses(pinfo, dbw_capacity_adjust);
58e5e9af
KG		 470
471 case STEP_COMPUTE_REGS:
472 /* STEP 6: compute controller register values */
a4c66509 473 debug("FSL Memory ctrl register computation\n");
58e5e9af
KG		 474 for (i = 0; i < CONFIG_NUM_DDR_CONTROLLERS; i++) {
475 if (timing_params[i].ndimms_present == 0) {
476 memset(&ddr_reg[i], 0,
477 sizeof(fsl_ddr_cfg_regs_t));
478 continue;
479 }
480
481 compute_fsl_memctl_config_regs(
482 &pinfo->memctl_opts[i],
483 &ddr_reg[i], &timing_params[i],
484 pinfo->dimm_params[i],
fc0c2b6f
HW		 485 dbw_capacity_adjust[i],
486 size_only);
58e5e9af
KG		 487 }
488
489 default:
490 break;
491 }
492
a4c66509 493 {
58e5e9af
KG		 494 /*
495 * Compute the amount of memory available just by
496 * looking for the highest valid CSn_BNDS value.
497 * This allows us to also experiment with using
498 * only CS0 when using dual-rank DIMMs.
499 */
500 unsigned int max_end = 0;
501
502 for (i = 0; i < CONFIG_NUM_DDR_CONTROLLERS; i++) {
503 for (j = 0; j < CONFIG_CHIP_SELECTS_PER_CTRL; j++) {
504 fsl_ddr_cfg_regs_t *reg = &ddr_reg[i];
505 if (reg->cs[j].config & 0x80000000) {
506 unsigned int end;
d8556db1
YS		 507 /*
508 * 0xfffffff is a special value we put
509 * for unused bnds
510 */
511 if (reg->cs[j].bnds == 0xffffffff)
512 continue;
513 end = reg->cs[j].bnds & 0xffff;
58e5e9af
KG		 514 if (end > max_end) {
515 max_end = end;
516 }
517 }
518 }
519 }
520
58e5e9af
KG		 521 total_mem = 1 + (((unsigned long long)max_end << 24ULL)
522 | 0xFFFFFFULL);
523 }
524
525 return total_mem;
526}
527
528/*
529 * fsl_ddr_sdram() -- this is the main function to be called by
530 * initdram() in the board file.
531 *
532 * It returns amount of memory configured in bytes.
533 */
534phys_size_t fsl_ddr_sdram(void)
535{
536 unsigned int i;
a4c66509 537 unsigned int law_memctl = LAW_TRGT_IF_DDR_1;
e7563aff 538 unsigned long long total_memory;
58e5e9af
KG		 539 fsl_ddr_info_t info;
540
541 /* Reset info structure. */
542 memset(&info, 0, sizeof(fsl_ddr_info_t));
543
544 /* Compute it once normally. */
6f5e1dc5 545#ifdef CONFIG_FSL_DDR_INTERACTIVE
e8ba6c50
JY		 546 if (tstc() && (getc() == 'd')) { /* we got a key press of 'd' */
547 total_memory = fsl_ddr_interactive(&info, 0);
548 } else if (fsl_ddr_interactive_env_var_exists()) {
549 total_memory = fsl_ddr_interactive(&info, 1);
e750cfaa 550 } else
6f5e1dc5
YS		 551#endif
552 total_memory = fsl_ddr_compute(&info, STEP_GET_SPD, 0);
58e5e9af 553
f31cfd19 554 /* setup 3-way interleaving before enabling DDRC */
0a7c5353
YS		 555 if (info.memctl_opts[0].memctl_interleaving) {
556 switch (info.memctl_opts[0].memctl_interleaving_mode) {
557 case FSL_DDR_3WAY_1KB_INTERLEAVING:
558 case FSL_DDR_3WAY_4KB_INTERLEAVING:
559 case FSL_DDR_3WAY_8KB_INTERLEAVING:
560 fsl_ddr_set_intl3r(
561 info.memctl_opts[0].memctl_interleaving_mode);
562 break;
563 default:
564 break;
565 }
f31cfd19
YS		 566 }
567
58e5e9af
KG		 568 /* Program configuration registers. */
569 for (i = 0; i < CONFIG_NUM_DDR_CONTROLLERS; i++) {
570 debug("Programming controller %u\n", i);
571 if (info.common_timing_params[i].ndimms_present == 0) {
572 debug("No dimms present on controller %u; "
573 "skipping programming\n", i);
574 continue;
575 }
576
577 fsl_ddr_set_memctl_regs(&(info.fsl_ddr_config_reg[i]), i);
578 }
579
a4c66509
YS		 580 /* program LAWs */
581 for (i = 0; i < CONFIG_NUM_DDR_CONTROLLERS; i++) {
582 if (info.memctl_opts[i].memctl_interleaving) {
583 switch (info.memctl_opts[i].memctl_interleaving_mode) {
584 case FSL_DDR_CACHE_LINE_INTERLEAVING:
585 case FSL_DDR_PAGE_INTERLEAVING:
586 case FSL_DDR_BANK_INTERLEAVING:
587 case FSL_DDR_SUPERBANK_INTERLEAVING:
588 if (i == 0) {
589 law_memctl = LAW_TRGT_IF_DDR_INTRLV;
590 fsl_ddr_set_lawbar(&info.common_timing_params[i],
591 law_memctl, i);
592 } else if (i == 2) {
593 law_memctl = LAW_TRGT_IF_DDR_INTLV_34;
594 fsl_ddr_set_lawbar(&info.common_timing_params[i],
595 law_memctl, i);
596 }
597 break;
598 case FSL_DDR_3WAY_1KB_INTERLEAVING:
599 case FSL_DDR_3WAY_4KB_INTERLEAVING:
600 case FSL_DDR_3WAY_8KB_INTERLEAVING:
601 law_memctl = LAW_TRGT_IF_DDR_INTLV_123;
602 if (i == 0) {
a4c66509
YS		 603 fsl_ddr_set_lawbar(&info.common_timing_params[i],
604 law_memctl, i);
605 }
606 break;
607 case FSL_DDR_4WAY_1KB_INTERLEAVING:
608 case FSL_DDR_4WAY_4KB_INTERLEAVING:
609 case FSL_DDR_4WAY_8KB_INTERLEAVING:
610 law_memctl = LAW_TRGT_IF_DDR_INTLV_1234;
611 if (i == 0)
612 fsl_ddr_set_lawbar(&info.common_timing_params[i],
613 law_memctl, i);
614 /* place holder for future 4-way interleaving */
615 break;
616 default:
617 break;
618 }
619 } else {
620 switch (i) {
621 case 0:
622 law_memctl = LAW_TRGT_IF_DDR_1;
623 break;
624 case 1:
625 law_memctl = LAW_TRGT_IF_DDR_2;
626 break;
627 case 2:
628 law_memctl = LAW_TRGT_IF_DDR_3;
629 break;
630 case 3:
631 law_memctl = LAW_TRGT_IF_DDR_4;
632 break;
633 default:
634 break;
635 }
58e5e9af 636 fsl_ddr_set_lawbar(&info.common_timing_params[i],
a4c66509 637 law_memctl, i);
58e5e9af
KG		 638 }
639 }
640
a4c66509 641 debug("total_memory by %s = %llu\n", __func__, total_memory);
e7563aff
KG		 642
643#if !defined(CONFIG_PHYS_64BIT)
644 /* Check for 4G or more. Bad. */
645 if (total_memory >= (1ull << 32)) {
646 printf("Detected %lld MB of memory\n", total_memory >> 20);
7ea3871e
BB		 647 printf(" This U-Boot only supports < 4G of DDR\n");
648 printf(" You could rebuild it with CONFIG_PHYS_64BIT\n");
649 printf(" "); /* re-align to match init_func_ram print */
e7563aff
KG		 650 total_memory = CONFIG_MAX_MEM_MAPPED;
651 }
652#endif
58e5e9af
KG		 653
654 return total_memory;
655}
fc0c2b6f
HW		 656
657/*
658 * fsl_ddr_sdram_size() - This function only returns the size of the total
659 * memory without setting ddr control registers.
660 */
661phys_size_t
662fsl_ddr_sdram_size(void)
663{
664 fsl_ddr_info_t info;
665 unsigned long long total_memory = 0;
666
667 memset(&info, 0 , sizeof(fsl_ddr_info_t));
668
669 /* Compute it once normally. */
670 total_memory = fsl_ddr_compute(&info, STEP_GET_SPD, 1);
671
672 return total_memory;
673}
"Das U-Boot" Source Tree