2 * Copyright Altera Corporation (C) 2012-2015
4 * SPDX-License-Identifier: BSD-3-Clause
9 #include <asm/arch/sdram.h>
11 #include "sequencer.h"
13 static struct socfpga_sdr_rw_load_manager
*sdr_rw_load_mgr_regs
=
14 (struct socfpga_sdr_rw_load_manager
*)
15 (SDR_PHYGRP_RWMGRGRP_ADDRESS
| 0x800);
16 static struct socfpga_sdr_rw_load_jump_manager
*sdr_rw_load_jump_mgr_regs
=
17 (struct socfpga_sdr_rw_load_jump_manager
*)
18 (SDR_PHYGRP_RWMGRGRP_ADDRESS
| 0xC00);
19 static struct socfpga_sdr_reg_file
*sdr_reg_file
=
20 (struct socfpga_sdr_reg_file
*)SDR_PHYGRP_REGFILEGRP_ADDRESS
;
21 static struct socfpga_sdr_scc_mgr
*sdr_scc_mgr
=
22 (struct socfpga_sdr_scc_mgr
*)
23 (SDR_PHYGRP_SCCGRP_ADDRESS
| 0xe00);
24 static struct socfpga_phy_mgr_cmd
*phy_mgr_cmd
=
25 (struct socfpga_phy_mgr_cmd
*)SDR_PHYGRP_PHYMGRGRP_ADDRESS
;
26 static struct socfpga_phy_mgr_cfg
*phy_mgr_cfg
=
27 (struct socfpga_phy_mgr_cfg
*)
28 (SDR_PHYGRP_PHYMGRGRP_ADDRESS
| 0x40);
29 static struct socfpga_data_mgr
*data_mgr
=
30 (struct socfpga_data_mgr
*)SDR_PHYGRP_DATAMGRGRP_ADDRESS
;
31 static struct socfpga_sdr_ctrl
*sdr_ctrl
=
32 (struct socfpga_sdr_ctrl
*)SDR_CTRLGRP_ADDRESS
;
34 const struct socfpga_sdram_rw_mgr_config
*rwcfg
;
35 const struct socfpga_sdram_io_config
*iocfg
;
36 const struct socfpga_sdram_misc_config
*misccfg
;
41 * In order to reduce ROM size, most of the selectable calibration steps are
42 * decided at compile time based on the user's calibration mode selection,
43 * as captured by the STATIC_CALIB_STEPS selection below.
45 * However, to support simulation-time selection of fast simulation mode, where
46 * we skip everything except the bare minimum, we need a few of the steps to
47 * be dynamic. In those cases, we either use the DYNAMIC_CALIB_STEPS for the
48 * check, which is based on the rtl-supplied value, or we dynamically compute
49 * the value to use based on the dynamically-chosen calibration mode
53 #define STATIC_IN_RTL_SIM 0
54 #define STATIC_SKIP_DELAY_LOOPS 0
56 #define STATIC_CALIB_STEPS (STATIC_IN_RTL_SIM | CALIB_SKIP_FULL_TEST | \
57 STATIC_SKIP_DELAY_LOOPS)
59 /* calibration steps requested by the rtl */
63 * To make CALIB_SKIP_DELAY_LOOPS a dynamic conditional option
64 * instead of static, we use boolean logic to select between
65 * non-skip and skip values
67 * The mask is set to include all bits when not-skipping, but is
71 u16 skip_delay_mask
; /* mask off bits when skipping/not-skipping */
73 #define SKIP_DELAY_LOOP_VALUE_OR_ZERO(non_skip_value) \
74 ((non_skip_value) & skip_delay_mask)
77 struct param_type
*param
;
79 static void set_failing_group_stage(u32 group
, u32 stage
,
83 * Only set the global stage if there was not been any other
86 if (gbl
->error_stage
== CAL_STAGE_NIL
) {
87 gbl
->error_substage
= substage
;
88 gbl
->error_stage
= stage
;
89 gbl
->error_group
= group
;
93 static void reg_file_set_group(u16 set_group
)
95 clrsetbits_le32(&sdr_reg_file
->cur_stage
, 0xffff0000, set_group
<< 16);
98 static void reg_file_set_stage(u8 set_stage
)
100 clrsetbits_le32(&sdr_reg_file
->cur_stage
, 0xffff, set_stage
& 0xff);
103 static void reg_file_set_sub_stage(u8 set_sub_stage
)
105 set_sub_stage
&= 0xff;
106 clrsetbits_le32(&sdr_reg_file
->cur_stage
, 0xff00, set_sub_stage
<< 8);
110 * phy_mgr_initialize() - Initialize PHY Manager
112 * Initialize PHY Manager.
114 static void phy_mgr_initialize(void)
118 debug("%s:%d\n", __func__
, __LINE__
);
119 /* Calibration has control over path to memory */
121 * In Hard PHY this is a 2-bit control:
125 writel(0x3, &phy_mgr_cfg
->mux_sel
);
127 /* USER memory clock is not stable we begin initialization */
128 writel(0, &phy_mgr_cfg
->reset_mem_stbl
);
130 /* USER calibration status all set to zero */
131 writel(0, &phy_mgr_cfg
->cal_status
);
133 writel(0, &phy_mgr_cfg
->cal_debug_info
);
135 /* Init params only if we do NOT skip calibration. */
136 if ((dyn_calib_steps
& CALIB_SKIP_ALL
) == CALIB_SKIP_ALL
)
139 ratio
= rwcfg
->mem_dq_per_read_dqs
/
140 rwcfg
->mem_virtual_groups_per_read_dqs
;
141 param
->read_correct_mask_vg
= (1 << ratio
) - 1;
142 param
->write_correct_mask_vg
= (1 << ratio
) - 1;
143 param
->read_correct_mask
= (1 << rwcfg
->mem_dq_per_read_dqs
) - 1;
144 param
->write_correct_mask
= (1 << rwcfg
->mem_dq_per_write_dqs
) - 1;
148 * set_rank_and_odt_mask() - Set Rank and ODT mask
150 * @odt_mode: ODT mode, OFF or READ_WRITE
152 * Set Rank and ODT mask (On-Die Termination).
154 static void set_rank_and_odt_mask(const u32 rank
, const u32 odt_mode
)
160 if (odt_mode
== RW_MGR_ODT_MODE_OFF
) {
163 } else { /* RW_MGR_ODT_MODE_READ_WRITE */
164 switch (rwcfg
->mem_number_of_ranks
) {
166 /* Read: ODT = 0 ; Write: ODT = 1 */
170 case 2: /* 2 Ranks */
171 if (rwcfg
->mem_number_of_cs_per_dimm
== 1) {
173 * - Dual-Slot , Single-Rank (1 CS per DIMM)
175 * - RDIMM, 4 total CS (2 CS per DIMM, 2 DIMM)
177 * Since MEM_NUMBER_OF_RANKS is 2, they
178 * are both single rank with 2 CS each
179 * (special for RDIMM).
181 * Read: Turn on ODT on the opposite rank
182 * Write: Turn on ODT on all ranks
184 odt_mask_0
= 0x3 & ~(1 << rank
);
188 * - Single-Slot , Dual-Rank (2 CS per DIMM)
190 * Read: Turn on ODT off on all ranks
191 * Write: Turn on ODT on active rank
194 odt_mask_1
= 0x3 & (1 << rank
);
197 case 4: /* 4 Ranks */
199 * ----------+-----------------------+
201 * Read From +-----------------------+
202 * Rank | 3 | 2 | 1 | 0 |
203 * ----------+-----+-----+-----+-----+
204 * 0 | 0 | 1 | 0 | 0 |
205 * 1 | 1 | 0 | 0 | 0 |
206 * 2 | 0 | 0 | 0 | 1 |
207 * 3 | 0 | 0 | 1 | 0 |
208 * ----------+-----+-----+-----+-----+
211 * ----------+-----------------------+
213 * Write To +-----------------------+
214 * Rank | 3 | 2 | 1 | 0 |
215 * ----------+-----+-----+-----+-----+
216 * 0 | 0 | 1 | 0 | 1 |
217 * 1 | 1 | 0 | 1 | 0 |
218 * 2 | 0 | 1 | 0 | 1 |
219 * 3 | 1 | 0 | 1 | 0 |
220 * ----------+-----+-----+-----+-----+
244 cs_and_odt_mask
= (0xFF & ~(1 << rank
)) |
245 ((0xFF & odt_mask_0
) << 8) |
246 ((0xFF & odt_mask_1
) << 16);
247 writel(cs_and_odt_mask
, SDR_PHYGRP_RWMGRGRP_ADDRESS
|
248 RW_MGR_SET_CS_AND_ODT_MASK_OFFSET
);
252 * scc_mgr_set() - Set SCC Manager register
253 * @off: Base offset in SCC Manager space
254 * @grp: Read/Write group
255 * @val: Value to be set
257 * This function sets the SCC Manager (Scan Chain Control Manager) register.
259 static void scc_mgr_set(u32 off
, u32 grp
, u32 val
)
261 writel(val
, SDR_PHYGRP_SCCGRP_ADDRESS
| off
| (grp
<< 2));
265 * scc_mgr_initialize() - Initialize SCC Manager registers
267 * Initialize SCC Manager registers.
269 static void scc_mgr_initialize(void)
272 * Clear register file for HPS. 16 (2^4) is the size of the
273 * full register file in the scc mgr:
274 * RFILE_DEPTH = 1 + log2(MEM_DQ_PER_DQS + 1 + MEM_DM_PER_DQS +
275 * MEM_IF_READ_DQS_WIDTH - 1);
279 for (i
= 0; i
< 16; i
++) {
280 debug_cond(DLEVEL
== 1, "%s:%d: Clearing SCC RFILE index %u\n",
281 __func__
, __LINE__
, i
);
282 scc_mgr_set(SCC_MGR_HHP_RFILE_OFFSET
, i
, 0);
286 static void scc_mgr_set_dqdqs_output_phase(u32 write_group
, u32 phase
)
288 scc_mgr_set(SCC_MGR_DQDQS_OUT_PHASE_OFFSET
, write_group
, phase
);
291 static void scc_mgr_set_dqs_bus_in_delay(u32 read_group
, u32 delay
)
293 scc_mgr_set(SCC_MGR_DQS_IN_DELAY_OFFSET
, read_group
, delay
);
296 static void scc_mgr_set_dqs_en_phase(u32 read_group
, u32 phase
)
298 scc_mgr_set(SCC_MGR_DQS_EN_PHASE_OFFSET
, read_group
, phase
);
301 static void scc_mgr_set_dqs_en_delay(u32 read_group
, u32 delay
)
303 scc_mgr_set(SCC_MGR_DQS_EN_DELAY_OFFSET
, read_group
, delay
);
306 static void scc_mgr_set_dqs_io_in_delay(u32 delay
)
308 scc_mgr_set(SCC_MGR_IO_IN_DELAY_OFFSET
, rwcfg
->mem_dq_per_write_dqs
,
312 static void scc_mgr_set_dq_in_delay(u32 dq_in_group
, u32 delay
)
314 scc_mgr_set(SCC_MGR_IO_IN_DELAY_OFFSET
, dq_in_group
, delay
);
317 static void scc_mgr_set_dq_out1_delay(u32 dq_in_group
, u32 delay
)
319 scc_mgr_set(SCC_MGR_IO_OUT1_DELAY_OFFSET
, dq_in_group
, delay
);
322 static void scc_mgr_set_dqs_out1_delay(u32 delay
)
324 scc_mgr_set(SCC_MGR_IO_OUT1_DELAY_OFFSET
, rwcfg
->mem_dq_per_write_dqs
,
328 static void scc_mgr_set_dm_out1_delay(u32 dm
, u32 delay
)
330 scc_mgr_set(SCC_MGR_IO_OUT1_DELAY_OFFSET
,
331 rwcfg
->mem_dq_per_write_dqs
+ 1 + dm
,
335 /* load up dqs config settings */
336 static void scc_mgr_load_dqs(u32 dqs
)
338 writel(dqs
, &sdr_scc_mgr
->dqs_ena
);
341 /* load up dqs io config settings */
342 static void scc_mgr_load_dqs_io(void)
344 writel(0, &sdr_scc_mgr
->dqs_io_ena
);
347 /* load up dq config settings */
348 static void scc_mgr_load_dq(u32 dq_in_group
)
350 writel(dq_in_group
, &sdr_scc_mgr
->dq_ena
);
353 /* load up dm config settings */
354 static void scc_mgr_load_dm(u32 dm
)
356 writel(dm
, &sdr_scc_mgr
->dm_ena
);
360 * scc_mgr_set_all_ranks() - Set SCC Manager register for all ranks
361 * @off: Base offset in SCC Manager space
362 * @grp: Read/Write group
363 * @val: Value to be set
364 * @update: If non-zero, trigger SCC Manager update for all ranks
366 * This function sets the SCC Manager (Scan Chain Control Manager) register
367 * and optionally triggers the SCC update for all ranks.
369 static void scc_mgr_set_all_ranks(const u32 off
, const u32 grp
, const u32 val
,
374 for (r
= 0; r
< rwcfg
->mem_number_of_ranks
;
375 r
+= NUM_RANKS_PER_SHADOW_REG
) {
376 scc_mgr_set(off
, grp
, val
);
378 if (update
|| (r
== 0)) {
379 writel(grp
, &sdr_scc_mgr
->dqs_ena
);
380 writel(0, &sdr_scc_mgr
->update
);
385 static void scc_mgr_set_dqs_en_phase_all_ranks(u32 read_group
, u32 phase
)
388 * USER although the h/w doesn't support different phases per
389 * shadow register, for simplicity our scc manager modeling
390 * keeps different phase settings per shadow reg, and it's
391 * important for us to keep them in sync to match h/w.
392 * for efficiency, the scan chain update should occur only
395 scc_mgr_set_all_ranks(SCC_MGR_DQS_EN_PHASE_OFFSET
,
396 read_group
, phase
, 0);
399 static void scc_mgr_set_dqdqs_output_phase_all_ranks(u32 write_group
,
403 * USER although the h/w doesn't support different phases per
404 * shadow register, for simplicity our scc manager modeling
405 * keeps different phase settings per shadow reg, and it's
406 * important for us to keep them in sync to match h/w.
407 * for efficiency, the scan chain update should occur only
410 scc_mgr_set_all_ranks(SCC_MGR_DQDQS_OUT_PHASE_OFFSET
,
411 write_group
, phase
, 0);
414 static void scc_mgr_set_dqs_en_delay_all_ranks(u32 read_group
,
418 * In shadow register mode, the T11 settings are stored in
419 * registers in the core, which are updated by the DQS_ENA
420 * signals. Not issuing the SCC_MGR_UPD command allows us to
421 * save lots of rank switching overhead, by calling
422 * select_shadow_regs_for_update with update_scan_chains
425 scc_mgr_set_all_ranks(SCC_MGR_DQS_EN_DELAY_OFFSET
,
426 read_group
, delay
, 1);
430 * scc_mgr_set_oct_out1_delay() - Set OCT output delay
431 * @write_group: Write group
432 * @delay: Delay value
434 * This function sets the OCT output delay in SCC manager.
436 static void scc_mgr_set_oct_out1_delay(const u32 write_group
, const u32 delay
)
438 const int ratio
= rwcfg
->mem_if_read_dqs_width
/
439 rwcfg
->mem_if_write_dqs_width
;
440 const int base
= write_group
* ratio
;
443 * Load the setting in the SCC manager
444 * Although OCT affects only write data, the OCT delay is controlled
445 * by the DQS logic block which is instantiated once per read group.
446 * For protocols where a write group consists of multiple read groups,
447 * the setting must be set multiple times.
449 for (i
= 0; i
< ratio
; i
++)
450 scc_mgr_set(SCC_MGR_OCT_OUT1_DELAY_OFFSET
, base
+ i
, delay
);
454 * scc_mgr_set_hhp_extras() - Set HHP extras.
456 * Load the fixed setting in the SCC manager HHP extras.
458 static void scc_mgr_set_hhp_extras(void)
461 * Load the fixed setting in the SCC manager
462 * bits: 0:0 = 1'b1 - DQS bypass
463 * bits: 1:1 = 1'b1 - DQ bypass
464 * bits: 4:2 = 3'b001 - rfifo_mode
465 * bits: 6:5 = 2'b01 - rfifo clock_select
466 * bits: 7:7 = 1'b0 - separate gating from ungating setting
467 * bits: 8:8 = 1'b0 - separate OE from Output delay setting
469 const u32 value
= (0 << 8) | (0 << 7) | (1 << 5) |
470 (1 << 2) | (1 << 1) | (1 << 0);
471 const u32 addr
= SDR_PHYGRP_SCCGRP_ADDRESS
|
472 SCC_MGR_HHP_GLOBALS_OFFSET
|
473 SCC_MGR_HHP_EXTRAS_OFFSET
;
475 debug_cond(DLEVEL
== 1, "%s:%d Setting HHP Extras\n",
478 debug_cond(DLEVEL
== 1, "%s:%d Done Setting HHP Extras\n",
483 * scc_mgr_zero_all() - Zero all DQS config
485 * Zero all DQS config.
487 static void scc_mgr_zero_all(void)
492 * USER Zero all DQS config settings, across all groups and all
495 for (r
= 0; r
< rwcfg
->mem_number_of_ranks
;
496 r
+= NUM_RANKS_PER_SHADOW_REG
) {
497 for (i
= 0; i
< rwcfg
->mem_if_read_dqs_width
; i
++) {
499 * The phases actually don't exist on a per-rank basis,
500 * but there's no harm updating them several times, so
501 * let's keep the code simple.
503 scc_mgr_set_dqs_bus_in_delay(i
, iocfg
->dqs_in_reserve
);
504 scc_mgr_set_dqs_en_phase(i
, 0);
505 scc_mgr_set_dqs_en_delay(i
, 0);
508 for (i
= 0; i
< rwcfg
->mem_if_write_dqs_width
; i
++) {
509 scc_mgr_set_dqdqs_output_phase(i
, 0);
510 /* Arria V/Cyclone V don't have out2. */
511 scc_mgr_set_oct_out1_delay(i
, iocfg
->dqs_out_reserve
);
515 /* Multicast to all DQS group enables. */
516 writel(0xff, &sdr_scc_mgr
->dqs_ena
);
517 writel(0, &sdr_scc_mgr
->update
);
521 * scc_set_bypass_mode() - Set bypass mode and trigger SCC update
522 * @write_group: Write group
524 * Set bypass mode and trigger SCC update.
526 static void scc_set_bypass_mode(const u32 write_group
)
528 /* Multicast to all DQ enables. */
529 writel(0xff, &sdr_scc_mgr
->dq_ena
);
530 writel(0xff, &sdr_scc_mgr
->dm_ena
);
532 /* Update current DQS IO enable. */
533 writel(0, &sdr_scc_mgr
->dqs_io_ena
);
535 /* Update the DQS logic. */
536 writel(write_group
, &sdr_scc_mgr
->dqs_ena
);
539 writel(0, &sdr_scc_mgr
->update
);
543 * scc_mgr_load_dqs_for_write_group() - Load DQS settings for Write Group
544 * @write_group: Write group
546 * Load DQS settings for Write Group, do not trigger SCC update.
548 static void scc_mgr_load_dqs_for_write_group(const u32 write_group
)
550 const int ratio
= rwcfg
->mem_if_read_dqs_width
/
551 rwcfg
->mem_if_write_dqs_width
;
552 const int base
= write_group
* ratio
;
555 * Load the setting in the SCC manager
556 * Although OCT affects only write data, the OCT delay is controlled
557 * by the DQS logic block which is instantiated once per read group.
558 * For protocols where a write group consists of multiple read groups,
559 * the setting must be set multiple times.
561 for (i
= 0; i
< ratio
; i
++)
562 writel(base
+ i
, &sdr_scc_mgr
->dqs_ena
);
566 * scc_mgr_zero_group() - Zero all configs for a group
568 * Zero DQ, DM, DQS and OCT configs for a group.
570 static void scc_mgr_zero_group(const u32 write_group
, const int out_only
)
574 for (r
= 0; r
< rwcfg
->mem_number_of_ranks
;
575 r
+= NUM_RANKS_PER_SHADOW_REG
) {
576 /* Zero all DQ config settings. */
577 for (i
= 0; i
< rwcfg
->mem_dq_per_write_dqs
; i
++) {
578 scc_mgr_set_dq_out1_delay(i
, 0);
580 scc_mgr_set_dq_in_delay(i
, 0);
583 /* Multicast to all DQ enables. */
584 writel(0xff, &sdr_scc_mgr
->dq_ena
);
586 /* Zero all DM config settings. */
587 for (i
= 0; i
< RW_MGR_NUM_DM_PER_WRITE_GROUP
; i
++)
588 scc_mgr_set_dm_out1_delay(i
, 0);
590 /* Multicast to all DM enables. */
591 writel(0xff, &sdr_scc_mgr
->dm_ena
);
593 /* Zero all DQS IO settings. */
595 scc_mgr_set_dqs_io_in_delay(0);
597 /* Arria V/Cyclone V don't have out2. */
598 scc_mgr_set_dqs_out1_delay(iocfg
->dqs_out_reserve
);
599 scc_mgr_set_oct_out1_delay(write_group
, iocfg
->dqs_out_reserve
);
600 scc_mgr_load_dqs_for_write_group(write_group
);
602 /* Multicast to all DQS IO enables (only 1 in total). */
603 writel(0, &sdr_scc_mgr
->dqs_io_ena
);
605 /* Hit update to zero everything. */
606 writel(0, &sdr_scc_mgr
->update
);
611 * apply and load a particular input delay for the DQ pins in a group
612 * group_bgn is the index of the first dq pin (in the write group)
614 static void scc_mgr_apply_group_dq_in_delay(u32 group_bgn
, u32 delay
)
618 for (i
= 0, p
= group_bgn
; i
< rwcfg
->mem_dq_per_read_dqs
; i
++, p
++) {
619 scc_mgr_set_dq_in_delay(p
, delay
);
625 * scc_mgr_apply_group_dq_out1_delay() - Apply and load an output delay for the DQ pins in a group
626 * @delay: Delay value
628 * Apply and load a particular output delay for the DQ pins in a group.
630 static void scc_mgr_apply_group_dq_out1_delay(const u32 delay
)
634 for (i
= 0; i
< rwcfg
->mem_dq_per_write_dqs
; i
++) {
635 scc_mgr_set_dq_out1_delay(i
, delay
);
640 /* apply and load a particular output delay for the DM pins in a group */
641 static void scc_mgr_apply_group_dm_out1_delay(u32 delay1
)
645 for (i
= 0; i
< RW_MGR_NUM_DM_PER_WRITE_GROUP
; i
++) {
646 scc_mgr_set_dm_out1_delay(i
, delay1
);
652 /* apply and load delay on both DQS and OCT out1 */
653 static void scc_mgr_apply_group_dqs_io_and_oct_out1(u32 write_group
,
656 scc_mgr_set_dqs_out1_delay(delay
);
657 scc_mgr_load_dqs_io();
659 scc_mgr_set_oct_out1_delay(write_group
, delay
);
660 scc_mgr_load_dqs_for_write_group(write_group
);
664 * scc_mgr_apply_group_all_out_delay_add() - Apply a delay to the entire output side: DQ, DM, DQS, OCT
665 * @write_group: Write group
666 * @delay: Delay value
668 * Apply a delay to the entire output side: DQ, DM, DQS, OCT.
670 static void scc_mgr_apply_group_all_out_delay_add(const u32 write_group
,
676 for (i
= 0; i
< rwcfg
->mem_dq_per_write_dqs
; i
++)
680 for (i
= 0; i
< RW_MGR_NUM_DM_PER_WRITE_GROUP
; i
++)
684 new_delay
= READ_SCC_DQS_IO_OUT2_DELAY
+ delay
;
685 if (new_delay
> iocfg
->io_out2_delay_max
) {
686 debug_cond(DLEVEL
== 1,
687 "%s:%d (%u, %u) DQS: %u > %d; adding %u to OUT1\n",
688 __func__
, __LINE__
, write_group
, delay
, new_delay
,
689 iocfg
->io_out2_delay_max
,
690 new_delay
- iocfg
->io_out2_delay_max
);
691 new_delay
-= iocfg
->io_out2_delay_max
;
692 scc_mgr_set_dqs_out1_delay(new_delay
);
695 scc_mgr_load_dqs_io();
698 new_delay
= READ_SCC_OCT_OUT2_DELAY
+ delay
;
699 if (new_delay
> iocfg
->io_out2_delay_max
) {
700 debug_cond(DLEVEL
== 1,
701 "%s:%d (%u, %u) DQS: %u > %d; adding %u to OUT1\n",
702 __func__
, __LINE__
, write_group
, delay
,
703 new_delay
, iocfg
->io_out2_delay_max
,
704 new_delay
- iocfg
->io_out2_delay_max
);
705 new_delay
-= iocfg
->io_out2_delay_max
;
706 scc_mgr_set_oct_out1_delay(write_group
, new_delay
);
709 scc_mgr_load_dqs_for_write_group(write_group
);
713 * scc_mgr_apply_group_all_out_delay_add() - Apply a delay to the entire output side to all ranks
714 * @write_group: Write group
715 * @delay: Delay value
717 * Apply a delay to the entire output side (DQ, DM, DQS, OCT) to all ranks.
720 scc_mgr_apply_group_all_out_delay_add_all_ranks(const u32 write_group
,
725 for (r
= 0; r
< rwcfg
->mem_number_of_ranks
;
726 r
+= NUM_RANKS_PER_SHADOW_REG
) {
727 scc_mgr_apply_group_all_out_delay_add(write_group
, delay
);
728 writel(0, &sdr_scc_mgr
->update
);
733 * set_jump_as_return() - Return instruction optimization
735 * Optimization used to recover some slots in ddr3 inst_rom could be
736 * applied to other protocols if we wanted to
738 static void set_jump_as_return(void)
741 * To save space, we replace return with jump to special shared
742 * RETURN instruction so we set the counter to large value so that
745 writel(0xff, &sdr_rw_load_mgr_regs
->load_cntr0
);
746 writel(rwcfg
->rreturn
, &sdr_rw_load_jump_mgr_regs
->load_jump_add0
);
750 * delay_for_n_mem_clocks() - Delay for N memory clocks
751 * @clocks: Length of the delay
753 * Delay for N memory clocks.
755 static void delay_for_n_mem_clocks(const u32 clocks
)
762 debug("%s:%d: clocks=%u ... start\n", __func__
, __LINE__
, clocks
);
764 /* Scale (rounding up) to get afi clocks. */
765 afi_clocks
= DIV_ROUND_UP(clocks
, misccfg
->afi_rate_ratio
);
766 if (afi_clocks
) /* Temporary underflow protection */
770 * Note, we don't bother accounting for being off a little
771 * bit because of a few extra instructions in outer loops.
772 * Note, the loops have a test at the end, and do the test
773 * before the decrement, and so always perform the loop
774 * 1 time more than the counter value
776 c_loop
= afi_clocks
>> 16;
777 outer
= c_loop
? 0xff : (afi_clocks
>> 8);
778 inner
= outer
? 0xff : afi_clocks
;
781 * rom instructions are structured as follows:
783 * IDLE_LOOP2: jnz cntr0, TARGET_A
784 * IDLE_LOOP1: jnz cntr1, TARGET_B
787 * so, when doing nested loops, TARGET_A is set to IDLE_LOOP2, and
788 * TARGET_B is set to IDLE_LOOP2 as well
790 * if we have no outer loop, though, then we can use IDLE_LOOP1 only,
791 * and set TARGET_B to IDLE_LOOP1 and we skip IDLE_LOOP2 entirely
793 * a little confusing, but it helps save precious space in the inst_rom
794 * and sequencer rom and keeps the delays more accurate and reduces
797 if (afi_clocks
< 0x100) {
798 writel(SKIP_DELAY_LOOP_VALUE_OR_ZERO(inner
),
799 &sdr_rw_load_mgr_regs
->load_cntr1
);
801 writel(rwcfg
->idle_loop1
,
802 &sdr_rw_load_jump_mgr_regs
->load_jump_add1
);
804 writel(rwcfg
->idle_loop1
, SDR_PHYGRP_RWMGRGRP_ADDRESS
|
805 RW_MGR_RUN_SINGLE_GROUP_OFFSET
);
807 writel(SKIP_DELAY_LOOP_VALUE_OR_ZERO(inner
),
808 &sdr_rw_load_mgr_regs
->load_cntr0
);
810 writel(SKIP_DELAY_LOOP_VALUE_OR_ZERO(outer
),
811 &sdr_rw_load_mgr_regs
->load_cntr1
);
813 writel(rwcfg
->idle_loop2
,
814 &sdr_rw_load_jump_mgr_regs
->load_jump_add0
);
816 writel(rwcfg
->idle_loop2
,
817 &sdr_rw_load_jump_mgr_regs
->load_jump_add1
);
820 writel(rwcfg
->idle_loop2
,
821 SDR_PHYGRP_RWMGRGRP_ADDRESS
|
822 RW_MGR_RUN_SINGLE_GROUP_OFFSET
);
823 } while (c_loop
-- != 0);
825 debug("%s:%d clocks=%u ... end\n", __func__
, __LINE__
, clocks
);
829 * rw_mgr_mem_init_load_regs() - Load instruction registers
830 * @cntr0: Counter 0 value
831 * @cntr1: Counter 1 value
832 * @cntr2: Counter 2 value
833 * @jump: Jump instruction value
835 * Load instruction registers.
837 static void rw_mgr_mem_init_load_regs(u32 cntr0
, u32 cntr1
, u32 cntr2
, u32 jump
)
839 u32 grpaddr
= SDR_PHYGRP_RWMGRGRP_ADDRESS
|
840 RW_MGR_RUN_SINGLE_GROUP_OFFSET
;
843 writel(SKIP_DELAY_LOOP_VALUE_OR_ZERO(cntr0
),
844 &sdr_rw_load_mgr_regs
->load_cntr0
);
845 writel(SKIP_DELAY_LOOP_VALUE_OR_ZERO(cntr1
),
846 &sdr_rw_load_mgr_regs
->load_cntr1
);
847 writel(SKIP_DELAY_LOOP_VALUE_OR_ZERO(cntr2
),
848 &sdr_rw_load_mgr_regs
->load_cntr2
);
850 /* Load jump address */
851 writel(jump
, &sdr_rw_load_jump_mgr_regs
->load_jump_add0
);
852 writel(jump
, &sdr_rw_load_jump_mgr_regs
->load_jump_add1
);
853 writel(jump
, &sdr_rw_load_jump_mgr_regs
->load_jump_add2
);
855 /* Execute count instruction */
856 writel(jump
, grpaddr
);
860 * rw_mgr_mem_load_user() - Load user calibration values
861 * @fin1: Final instruction 1
862 * @fin2: Final instruction 2
863 * @precharge: If 1, precharge the banks at the end
865 * Load user calibration values and optionally precharge the banks.
867 static void rw_mgr_mem_load_user(const u32 fin1
, const u32 fin2
,
870 u32 grpaddr
= SDR_PHYGRP_RWMGRGRP_ADDRESS
|
871 RW_MGR_RUN_SINGLE_GROUP_OFFSET
;
874 for (r
= 0; r
< rwcfg
->mem_number_of_ranks
; r
++) {
876 set_rank_and_odt_mask(r
, RW_MGR_ODT_MODE_OFF
);
878 /* precharge all banks ... */
880 writel(rwcfg
->precharge_all
, grpaddr
);
883 * USER Use Mirror-ed commands for odd ranks if address
886 if ((rwcfg
->mem_address_mirroring
>> r
) & 0x1) {
887 set_jump_as_return();
888 writel(rwcfg
->mrs2_mirr
, grpaddr
);
889 delay_for_n_mem_clocks(4);
890 set_jump_as_return();
891 writel(rwcfg
->mrs3_mirr
, grpaddr
);
892 delay_for_n_mem_clocks(4);
893 set_jump_as_return();
894 writel(rwcfg
->mrs1_mirr
, grpaddr
);
895 delay_for_n_mem_clocks(4);
896 set_jump_as_return();
897 writel(fin1
, grpaddr
);
899 set_jump_as_return();
900 writel(rwcfg
->mrs2
, grpaddr
);
901 delay_for_n_mem_clocks(4);
902 set_jump_as_return();
903 writel(rwcfg
->mrs3
, grpaddr
);
904 delay_for_n_mem_clocks(4);
905 set_jump_as_return();
906 writel(rwcfg
->mrs1
, grpaddr
);
907 set_jump_as_return();
908 writel(fin2
, grpaddr
);
914 set_jump_as_return();
915 writel(rwcfg
->zqcl
, grpaddr
);
917 /* tZQinit = tDLLK = 512 ck cycles */
918 delay_for_n_mem_clocks(512);
923 * rw_mgr_mem_initialize() - Initialize RW Manager
925 * Initialize RW Manager.
927 static void rw_mgr_mem_initialize(void)
929 debug("%s:%d\n", __func__
, __LINE__
);
931 /* The reset / cke part of initialization is broadcasted to all ranks */
932 writel(RW_MGR_RANK_ALL
, SDR_PHYGRP_RWMGRGRP_ADDRESS
|
933 RW_MGR_SET_CS_AND_ODT_MASK_OFFSET
);
936 * Here's how you load register for a loop
937 * Counters are located @ 0x800
938 * Jump address are located @ 0xC00
939 * For both, registers 0 to 3 are selected using bits 3 and 2, like
940 * in 0x800, 0x804, 0x808, 0x80C and 0xC00, 0xC04, 0xC08, 0xC0C
941 * I know this ain't pretty, but Avalon bus throws away the 2 least
945 /* Start with memory RESET activated */
950 * 200us @ 266MHz (3.75 ns) ~ 54000 clock cycles
951 * If a and b are the number of iteration in 2 nested loops
952 * it takes the following number of cycles to complete the operation:
953 * number_of_cycles = ((2 + n) * a + 2) * b
954 * where n is the number of instruction in the inner loop
955 * One possible solution is n = 0 , a = 256 , b = 106 => a = FF,
958 rw_mgr_mem_init_load_regs(misccfg
->tinit_cntr0_val
,
959 misccfg
->tinit_cntr1_val
,
960 misccfg
->tinit_cntr2_val
,
961 rwcfg
->init_reset_0_cke_0
);
963 /* Indicate that memory is stable. */
964 writel(1, &phy_mgr_cfg
->reset_mem_stbl
);
967 * transition the RESET to high
972 * 500us @ 266MHz (3.75 ns) ~ 134000 clock cycles
973 * If a and b are the number of iteration in 2 nested loops
974 * it takes the following number of cycles to complete the operation
975 * number_of_cycles = ((2 + n) * a + 2) * b
976 * where n is the number of instruction in the inner loop
977 * One possible solution is n = 2 , a = 131 , b = 256 => a = 83,
980 rw_mgr_mem_init_load_regs(misccfg
->treset_cntr0_val
,
981 misccfg
->treset_cntr1_val
,
982 misccfg
->treset_cntr2_val
,
983 rwcfg
->init_reset_1_cke_0
);
985 /* Bring up clock enable. */
987 /* tXRP < 250 ck cycles */
988 delay_for_n_mem_clocks(250);
990 rw_mgr_mem_load_user(rwcfg
->mrs0_dll_reset_mirr
, rwcfg
->mrs0_dll_reset
,
995 * rw_mgr_mem_handoff() - Hand off the memory to user
997 * At the end of calibration we have to program the user settings in
998 * and hand off the memory to the user.
1000 static void rw_mgr_mem_handoff(void)
1002 rw_mgr_mem_load_user(rwcfg
->mrs0_user_mirr
, rwcfg
->mrs0_user
, 1);
1004 * Need to wait tMOD (12CK or 15ns) time before issuing other
1005 * commands, but we will have plenty of NIOS cycles before actual
1006 * handoff so its okay.
1011 * rw_mgr_mem_calibrate_write_test_issue() - Issue write test command
1012 * @group: Write Group
1015 * Issue write test command. Two variants are provided, one that just tests
1016 * a write pattern and another that tests datamask functionality.
1018 static void rw_mgr_mem_calibrate_write_test_issue(u32 group
,
1021 const u32 quick_write_mode
=
1022 (STATIC_CALIB_STEPS
& CALIB_SKIP_WRITES
) &&
1023 misccfg
->enable_super_quick_calibration
;
1024 u32 mcc_instruction
;
1025 u32 rw_wl_nop_cycles
;
1028 * Set counter and jump addresses for the right
1029 * number of NOP cycles.
1030 * The number of supported NOP cycles can range from -1 to infinity
1031 * Three different cases are handled:
1033 * 1. For a number of NOP cycles greater than 0, the RW Mgr looping
1034 * mechanism will be used to insert the right number of NOPs
1036 * 2. For a number of NOP cycles equals to 0, the micro-instruction
1037 * issuing the write command will jump straight to the
1038 * micro-instruction that turns on DQS (for DDRx), or outputs write
1039 * data (for RLD), skipping
1040 * the NOP micro-instruction all together
1042 * 3. A number of NOP cycles equal to -1 indicates that DQS must be
1043 * turned on in the same micro-instruction that issues the write
1044 * command. Then we need
1045 * to directly jump to the micro-instruction that sends out the data
1047 * NOTE: Implementing this mechanism uses 2 RW Mgr jump-counters
1048 * (2 and 3). One jump-counter (0) is used to perform multiple
1049 * write-read operations.
1050 * one counter left to issue this command in "multiple-group" mode
1053 rw_wl_nop_cycles
= gbl
->rw_wl_nop_cycles
;
1055 if (rw_wl_nop_cycles
== -1) {
1057 * CNTR 2 - We want to execute the special write operation that
1058 * turns on DQS right away and then skip directly to the
1059 * instruction that sends out the data. We set the counter to a
1060 * large number so that the jump is always taken.
1062 writel(0xFF, &sdr_rw_load_mgr_regs
->load_cntr2
);
1064 /* CNTR 3 - Not used */
1066 mcc_instruction
= rwcfg
->lfsr_wr_rd_dm_bank_0_wl_1
;
1067 writel(rwcfg
->lfsr_wr_rd_dm_bank_0_data
,
1068 &sdr_rw_load_jump_mgr_regs
->load_jump_add2
);
1069 writel(rwcfg
->lfsr_wr_rd_dm_bank_0_nop
,
1070 &sdr_rw_load_jump_mgr_regs
->load_jump_add3
);
1072 mcc_instruction
= rwcfg
->lfsr_wr_rd_bank_0_wl_1
;
1073 writel(rwcfg
->lfsr_wr_rd_bank_0_data
,
1074 &sdr_rw_load_jump_mgr_regs
->load_jump_add2
);
1075 writel(rwcfg
->lfsr_wr_rd_bank_0_nop
,
1076 &sdr_rw_load_jump_mgr_regs
->load_jump_add3
);
1078 } else if (rw_wl_nop_cycles
== 0) {
1080 * CNTR 2 - We want to skip the NOP operation and go straight
1081 * to the DQS enable instruction. We set the counter to a large
1082 * number so that the jump is always taken.
1084 writel(0xFF, &sdr_rw_load_mgr_regs
->load_cntr2
);
1086 /* CNTR 3 - Not used */
1088 mcc_instruction
= rwcfg
->lfsr_wr_rd_dm_bank_0
;
1089 writel(rwcfg
->lfsr_wr_rd_dm_bank_0_dqs
,
1090 &sdr_rw_load_jump_mgr_regs
->load_jump_add2
);
1092 mcc_instruction
= rwcfg
->lfsr_wr_rd_bank_0
;
1093 writel(rwcfg
->lfsr_wr_rd_bank_0_dqs
,
1094 &sdr_rw_load_jump_mgr_regs
->load_jump_add2
);
1098 * CNTR 2 - In this case we want to execute the next instruction
1099 * and NOT take the jump. So we set the counter to 0. The jump
1100 * address doesn't count.
1102 writel(0x0, &sdr_rw_load_mgr_regs
->load_cntr2
);
1103 writel(0x0, &sdr_rw_load_jump_mgr_regs
->load_jump_add2
);
1106 * CNTR 3 - Set the nop counter to the number of cycles we
1107 * need to loop for, minus 1.
1109 writel(rw_wl_nop_cycles
- 1, &sdr_rw_load_mgr_regs
->load_cntr3
);
1111 mcc_instruction
= rwcfg
->lfsr_wr_rd_dm_bank_0
;
1112 writel(rwcfg
->lfsr_wr_rd_dm_bank_0_nop
,
1113 &sdr_rw_load_jump_mgr_regs
->load_jump_add3
);
1115 mcc_instruction
= rwcfg
->lfsr_wr_rd_bank_0
;
1116 writel(rwcfg
->lfsr_wr_rd_bank_0_nop
,
1117 &sdr_rw_load_jump_mgr_regs
->load_jump_add3
);
1121 writel(0, SDR_PHYGRP_RWMGRGRP_ADDRESS
|
1122 RW_MGR_RESET_READ_DATAPATH_OFFSET
);
1124 if (quick_write_mode
)
1125 writel(0x08, &sdr_rw_load_mgr_regs
->load_cntr0
);
1127 writel(0x40, &sdr_rw_load_mgr_regs
->load_cntr0
);
1129 writel(mcc_instruction
, &sdr_rw_load_jump_mgr_regs
->load_jump_add0
);
1132 * CNTR 1 - This is used to ensure enough time elapses
1133 * for read data to come back.
1135 writel(0x30, &sdr_rw_load_mgr_regs
->load_cntr1
);
1138 writel(rwcfg
->lfsr_wr_rd_dm_bank_0_wait
,
1139 &sdr_rw_load_jump_mgr_regs
->load_jump_add1
);
1141 writel(rwcfg
->lfsr_wr_rd_bank_0_wait
,
1142 &sdr_rw_load_jump_mgr_regs
->load_jump_add1
);
1145 writel(mcc_instruction
, (SDR_PHYGRP_RWMGRGRP_ADDRESS
|
1146 RW_MGR_RUN_SINGLE_GROUP_OFFSET
) +
1151 * rw_mgr_mem_calibrate_write_test() - Test writes, check for single/multiple pass
1152 * @rank_bgn: Rank number
1153 * @write_group: Write Group
1155 * @all_correct: All bits must be correct in the mask
1156 * @bit_chk: Resulting bit mask after the test
1157 * @all_ranks: Test all ranks
1159 * Test writes, can check for a single bit pass or multiple bit pass.
1162 rw_mgr_mem_calibrate_write_test(const u32 rank_bgn
, const u32 write_group
,
1163 const u32 use_dm
, const u32 all_correct
,
1164 u32
*bit_chk
, const u32 all_ranks
)
1166 const u32 rank_end
= all_ranks
?
1167 rwcfg
->mem_number_of_ranks
:
1168 (rank_bgn
+ NUM_RANKS_PER_SHADOW_REG
);
1169 const u32 shift_ratio
= rwcfg
->mem_dq_per_write_dqs
/
1170 rwcfg
->mem_virtual_groups_per_write_dqs
;
1171 const u32 correct_mask_vg
= param
->write_correct_mask_vg
;
1173 u32 tmp_bit_chk
, base_rw_mgr
;
1176 *bit_chk
= param
->write_correct_mask
;
1178 for (r
= rank_bgn
; r
< rank_end
; r
++) {
1180 set_rank_and_odt_mask(r
, RW_MGR_ODT_MODE_READ_WRITE
);
1183 for (vg
= rwcfg
->mem_virtual_groups_per_write_dqs
- 1;
1185 /* Reset the FIFOs to get pointers to known state. */
1186 writel(0, &phy_mgr_cmd
->fifo_reset
);
1188 rw_mgr_mem_calibrate_write_test_issue(
1190 rwcfg
->mem_virtual_groups_per_write_dqs
+ vg
,
1193 base_rw_mgr
= readl(SDR_PHYGRP_RWMGRGRP_ADDRESS
);
1194 tmp_bit_chk
<<= shift_ratio
;
1195 tmp_bit_chk
|= (correct_mask_vg
& ~(base_rw_mgr
));
1198 *bit_chk
&= tmp_bit_chk
;
1201 set_rank_and_odt_mask(0, RW_MGR_ODT_MODE_OFF
);
1203 debug_cond(DLEVEL
== 2,
1204 "write_test(%u,%u,ALL) : %u == %u => %i\n",
1205 write_group
, use_dm
, *bit_chk
,
1206 param
->write_correct_mask
,
1207 *bit_chk
== param
->write_correct_mask
);
1208 return *bit_chk
== param
->write_correct_mask
;
1210 debug_cond(DLEVEL
== 2,
1211 "write_test(%u,%u,ONE) : %u != %i => %i\n",
1212 write_group
, use_dm
, *bit_chk
, 0, *bit_chk
!= 0);
1213 return *bit_chk
!= 0x00;
1218 * rw_mgr_mem_calibrate_read_test_patterns() - Read back test patterns
1219 * @rank_bgn: Rank number
1220 * @group: Read/Write Group
1221 * @all_ranks: Test all ranks
1223 * Performs a guaranteed read on the patterns we are going to use during a
1224 * read test to ensure memory works.
1227 rw_mgr_mem_calibrate_read_test_patterns(const u32 rank_bgn
, const u32 group
,
1228 const u32 all_ranks
)
1230 const u32 addr
= SDR_PHYGRP_RWMGRGRP_ADDRESS
|
1231 RW_MGR_RUN_SINGLE_GROUP_OFFSET
;
1232 const u32 addr_offset
=
1233 (group
* rwcfg
->mem_virtual_groups_per_read_dqs
) << 2;
1234 const u32 rank_end
= all_ranks
?
1235 rwcfg
->mem_number_of_ranks
:
1236 (rank_bgn
+ NUM_RANKS_PER_SHADOW_REG
);
1237 const u32 shift_ratio
= rwcfg
->mem_dq_per_read_dqs
/
1238 rwcfg
->mem_virtual_groups_per_read_dqs
;
1239 const u32 correct_mask_vg
= param
->read_correct_mask_vg
;
1241 u32 tmp_bit_chk
, base_rw_mgr
, bit_chk
;
1245 bit_chk
= param
->read_correct_mask
;
1247 for (r
= rank_bgn
; r
< rank_end
; r
++) {
1249 set_rank_and_odt_mask(r
, RW_MGR_ODT_MODE_READ_WRITE
);
1251 /* Load up a constant bursts of read commands */
1252 writel(0x20, &sdr_rw_load_mgr_regs
->load_cntr0
);
1253 writel(rwcfg
->guaranteed_read
,
1254 &sdr_rw_load_jump_mgr_regs
->load_jump_add0
);
1256 writel(0x20, &sdr_rw_load_mgr_regs
->load_cntr1
);
1257 writel(rwcfg
->guaranteed_read_cont
,
1258 &sdr_rw_load_jump_mgr_regs
->load_jump_add1
);
1261 for (vg
= rwcfg
->mem_virtual_groups_per_read_dqs
- 1;
1263 /* Reset the FIFOs to get pointers to known state. */
1264 writel(0, &phy_mgr_cmd
->fifo_reset
);
1265 writel(0, SDR_PHYGRP_RWMGRGRP_ADDRESS
|
1266 RW_MGR_RESET_READ_DATAPATH_OFFSET
);
1267 writel(rwcfg
->guaranteed_read
,
1268 addr
+ addr_offset
+ (vg
<< 2));
1270 base_rw_mgr
= readl(SDR_PHYGRP_RWMGRGRP_ADDRESS
);
1271 tmp_bit_chk
<<= shift_ratio
;
1272 tmp_bit_chk
|= correct_mask_vg
& ~base_rw_mgr
;
1275 bit_chk
&= tmp_bit_chk
;
1278 writel(rwcfg
->clear_dqs_enable
, addr
+ (group
<< 2));
1280 set_rank_and_odt_mask(0, RW_MGR_ODT_MODE_OFF
);
1282 if (bit_chk
!= param
->read_correct_mask
)
1285 debug_cond(DLEVEL
== 1,
1286 "%s:%d test_load_patterns(%u,ALL) => (%u == %u) => %i\n",
1287 __func__
, __LINE__
, group
, bit_chk
,
1288 param
->read_correct_mask
, ret
);
1294 * rw_mgr_mem_calibrate_read_load_patterns() - Load up the patterns for read test
1295 * @rank_bgn: Rank number
1296 * @all_ranks: Test all ranks
1298 * Load up the patterns we are going to use during a read test.
1300 static void rw_mgr_mem_calibrate_read_load_patterns(const u32 rank_bgn
,
1301 const int all_ranks
)
1303 const u32 rank_end
= all_ranks
?
1304 rwcfg
->mem_number_of_ranks
:
1305 (rank_bgn
+ NUM_RANKS_PER_SHADOW_REG
);
1308 debug("%s:%d\n", __func__
, __LINE__
);
1310 for (r
= rank_bgn
; r
< rank_end
; r
++) {
1312 set_rank_and_odt_mask(r
, RW_MGR_ODT_MODE_READ_WRITE
);
1314 /* Load up a constant bursts */
1315 writel(0x20, &sdr_rw_load_mgr_regs
->load_cntr0
);
1317 writel(rwcfg
->guaranteed_write_wait0
,
1318 &sdr_rw_load_jump_mgr_regs
->load_jump_add0
);
1320 writel(0x20, &sdr_rw_load_mgr_regs
->load_cntr1
);
1322 writel(rwcfg
->guaranteed_write_wait1
,
1323 &sdr_rw_load_jump_mgr_regs
->load_jump_add1
);
1325 writel(0x04, &sdr_rw_load_mgr_regs
->load_cntr2
);
1327 writel(rwcfg
->guaranteed_write_wait2
,
1328 &sdr_rw_load_jump_mgr_regs
->load_jump_add2
);
1330 writel(0x04, &sdr_rw_load_mgr_regs
->load_cntr3
);
1332 writel(rwcfg
->guaranteed_write_wait3
,
1333 &sdr_rw_load_jump_mgr_regs
->load_jump_add3
);
1335 writel(rwcfg
->guaranteed_write
, SDR_PHYGRP_RWMGRGRP_ADDRESS
|
1336 RW_MGR_RUN_SINGLE_GROUP_OFFSET
);
1339 set_rank_and_odt_mask(0, RW_MGR_ODT_MODE_OFF
);
1343 * rw_mgr_mem_calibrate_read_test() - Perform READ test on single rank
1344 * @rank_bgn: Rank number
1345 * @group: Read/Write group
1346 * @num_tries: Number of retries of the test
1347 * @all_correct: All bits must be correct in the mask
1348 * @bit_chk: Resulting bit mask after the test
1349 * @all_groups: Test all R/W groups
1350 * @all_ranks: Test all ranks
1352 * Try a read and see if it returns correct data back. Test has dummy reads
1353 * inserted into the mix used to align DQS enable. Test has more thorough
1354 * checks than the regular read test.
1357 rw_mgr_mem_calibrate_read_test(const u32 rank_bgn
, const u32 group
,
1358 const u32 num_tries
, const u32 all_correct
,
1360 const u32 all_groups
, const u32 all_ranks
)
1362 const u32 rank_end
= all_ranks
? rwcfg
->mem_number_of_ranks
:
1363 (rank_bgn
+ NUM_RANKS_PER_SHADOW_REG
);
1364 const u32 quick_read_mode
=
1365 ((STATIC_CALIB_STEPS
& CALIB_SKIP_DELAY_SWEEPS
) &&
1366 misccfg
->enable_super_quick_calibration
);
1367 u32 correct_mask_vg
= param
->read_correct_mask_vg
;
1374 *bit_chk
= param
->read_correct_mask
;
1376 for (r
= rank_bgn
; r
< rank_end
; r
++) {
1378 set_rank_and_odt_mask(r
, RW_MGR_ODT_MODE_READ_WRITE
);
1380 writel(0x10, &sdr_rw_load_mgr_regs
->load_cntr1
);
1382 writel(rwcfg
->read_b2b_wait1
,
1383 &sdr_rw_load_jump_mgr_regs
->load_jump_add1
);
1385 writel(0x10, &sdr_rw_load_mgr_regs
->load_cntr2
);
1386 writel(rwcfg
->read_b2b_wait2
,
1387 &sdr_rw_load_jump_mgr_regs
->load_jump_add2
);
1389 if (quick_read_mode
)
1390 writel(0x1, &sdr_rw_load_mgr_regs
->load_cntr0
);
1391 /* need at least two (1+1) reads to capture failures */
1392 else if (all_groups
)
1393 writel(0x06, &sdr_rw_load_mgr_regs
->load_cntr0
);
1395 writel(0x32, &sdr_rw_load_mgr_regs
->load_cntr0
);
1397 writel(rwcfg
->read_b2b
,
1398 &sdr_rw_load_jump_mgr_regs
->load_jump_add0
);
1400 writel(rwcfg
->mem_if_read_dqs_width
*
1401 rwcfg
->mem_virtual_groups_per_read_dqs
- 1,
1402 &sdr_rw_load_mgr_regs
->load_cntr3
);
1404 writel(0x0, &sdr_rw_load_mgr_regs
->load_cntr3
);
1406 writel(rwcfg
->read_b2b
,
1407 &sdr_rw_load_jump_mgr_regs
->load_jump_add3
);
1410 for (vg
= rwcfg
->mem_virtual_groups_per_read_dqs
- 1; vg
>= 0;
1412 /* Reset the FIFOs to get pointers to known state. */
1413 writel(0, &phy_mgr_cmd
->fifo_reset
);
1414 writel(0, SDR_PHYGRP_RWMGRGRP_ADDRESS
|
1415 RW_MGR_RESET_READ_DATAPATH_OFFSET
);
1418 addr
= SDR_PHYGRP_RWMGRGRP_ADDRESS
|
1419 RW_MGR_RUN_ALL_GROUPS_OFFSET
;
1421 addr
= SDR_PHYGRP_RWMGRGRP_ADDRESS
|
1422 RW_MGR_RUN_SINGLE_GROUP_OFFSET
;
1425 writel(rwcfg
->read_b2b
, addr
+
1427 rwcfg
->mem_virtual_groups_per_read_dqs
+
1430 base_rw_mgr
= readl(SDR_PHYGRP_RWMGRGRP_ADDRESS
);
1431 tmp_bit_chk
<<= rwcfg
->mem_dq_per_read_dqs
/
1432 rwcfg
->mem_virtual_groups_per_read_dqs
;
1433 tmp_bit_chk
|= correct_mask_vg
& ~(base_rw_mgr
);
1436 *bit_chk
&= tmp_bit_chk
;
1439 addr
= SDR_PHYGRP_RWMGRGRP_ADDRESS
| RW_MGR_RUN_SINGLE_GROUP_OFFSET
;
1440 writel(rwcfg
->clear_dqs_enable
, addr
+ (group
<< 2));
1442 set_rank_and_odt_mask(0, RW_MGR_ODT_MODE_OFF
);
1445 ret
= (*bit_chk
== param
->read_correct_mask
);
1446 debug_cond(DLEVEL
== 2,
1447 "%s:%d read_test(%u,ALL,%u) => (%u == %u) => %i\n",
1448 __func__
, __LINE__
, group
, all_groups
, *bit_chk
,
1449 param
->read_correct_mask
, ret
);
1451 ret
= (*bit_chk
!= 0x00);
1452 debug_cond(DLEVEL
== 2,
1453 "%s:%d read_test(%u,ONE,%u) => (%u != %u) => %i\n",
1454 __func__
, __LINE__
, group
, all_groups
, *bit_chk
,
1462 * rw_mgr_mem_calibrate_read_test_all_ranks() - Perform READ test on all ranks
1463 * @grp: Read/Write group
1464 * @num_tries: Number of retries of the test
1465 * @all_correct: All bits must be correct in the mask
1466 * @all_groups: Test all R/W groups
1468 * Perform a READ test across all memory ranks.
1471 rw_mgr_mem_calibrate_read_test_all_ranks(const u32 grp
, const u32 num_tries
,
1472 const u32 all_correct
,
1473 const u32 all_groups
)
1476 return rw_mgr_mem_calibrate_read_test(0, grp
, num_tries
, all_correct
,
1477 &bit_chk
, all_groups
, 1);
1481 * rw_mgr_incr_vfifo() - Increase VFIFO value
1482 * @grp: Read/Write group
1484 * Increase VFIFO value.
1486 static void rw_mgr_incr_vfifo(const u32 grp
)
1488 writel(grp
, &phy_mgr_cmd
->inc_vfifo_hard_phy
);
1492 * rw_mgr_decr_vfifo() - Decrease VFIFO value
1493 * @grp: Read/Write group
1495 * Decrease VFIFO value.
1497 static void rw_mgr_decr_vfifo(const u32 grp
)
1501 for (i
= 0; i
< misccfg
->read_valid_fifo_size
- 1; i
++)
1502 rw_mgr_incr_vfifo(grp
);
1506 * find_vfifo_failing_read() - Push VFIFO to get a failing read
1507 * @grp: Read/Write group
1509 * Push VFIFO until a failing read happens.
1511 static int find_vfifo_failing_read(const u32 grp
)
1513 u32 v
, ret
, fail_cnt
= 0;
1515 for (v
= 0; v
< misccfg
->read_valid_fifo_size
; v
++) {
1516 debug_cond(DLEVEL
== 2, "%s:%d: vfifo %u\n",
1517 __func__
, __LINE__
, v
);
1518 ret
= rw_mgr_mem_calibrate_read_test_all_ranks(grp
, 1,
1527 /* Fiddle with FIFO. */
1528 rw_mgr_incr_vfifo(grp
);
1531 /* No failing read found! Something must have gone wrong. */
1532 debug_cond(DLEVEL
== 2, "%s:%d: vfifo failed\n", __func__
, __LINE__
);
1537 * sdr_find_phase_delay() - Find DQS enable phase or delay
1538 * @working: If 1, look for working phase/delay, if 0, look for non-working
1539 * @delay: If 1, look for delay, if 0, look for phase
1540 * @grp: Read/Write group
1541 * @work: Working window position
1542 * @work_inc: Working window increment
1543 * @pd: DQS Phase/Delay Iterator
1545 * Find working or non-working DQS enable phase setting.
1547 static int sdr_find_phase_delay(int working
, int delay
, const u32 grp
,
1548 u32
*work
, const u32 work_inc
, u32
*pd
)
1550 const u32 max
= delay
? iocfg
->dqs_en_delay_max
:
1551 iocfg
->dqs_en_phase_max
;
1554 for (; *pd
<= max
; (*pd
)++) {
1556 scc_mgr_set_dqs_en_delay_all_ranks(grp
, *pd
);
1558 scc_mgr_set_dqs_en_phase_all_ranks(grp
, *pd
);
1560 ret
= rw_mgr_mem_calibrate_read_test_all_ranks(grp
, 1,
1575 * sdr_find_phase() - Find DQS enable phase
1576 * @working: If 1, look for working phase, if 0, look for non-working phase
1577 * @grp: Read/Write group
1578 * @work: Working window position
1580 * @p: DQS Phase Iterator
1582 * Find working or non-working DQS enable phase setting.
1584 static int sdr_find_phase(int working
, const u32 grp
, u32
*work
,
1587 const u32 end
= misccfg
->read_valid_fifo_size
+ (working
? 0 : 1);
1590 for (; *i
< end
; (*i
)++) {
1594 ret
= sdr_find_phase_delay(working
, 0, grp
, work
,
1595 iocfg
->delay_per_opa_tap
, p
);
1599 if (*p
> iocfg
->dqs_en_phase_max
) {
1600 /* Fiddle with FIFO. */
1601 rw_mgr_incr_vfifo(grp
);
1611 * sdr_working_phase() - Find working DQS enable phase
1612 * @grp: Read/Write group
1613 * @work_bgn: Working window start position
1614 * @d: dtaps output value
1615 * @p: DQS Phase Iterator
1618 * Find working DQS enable phase setting.
1620 static int sdr_working_phase(const u32 grp
, u32
*work_bgn
, u32
*d
,
1623 const u32 dtaps_per_ptap
= iocfg
->delay_per_opa_tap
/
1624 iocfg
->delay_per_dqs_en_dchain_tap
;
1629 for (*d
= 0; *d
<= dtaps_per_ptap
; (*d
)++) {
1631 scc_mgr_set_dqs_en_delay_all_ranks(grp
, *d
);
1632 ret
= sdr_find_phase(1, grp
, work_bgn
, i
, p
);
1635 *work_bgn
+= iocfg
->delay_per_dqs_en_dchain_tap
;
1638 /* Cannot find working solution */
1639 debug_cond(DLEVEL
== 2, "%s:%d find_dqs_en_phase: no vfifo/ptap/dtap\n",
1640 __func__
, __LINE__
);
1645 * sdr_backup_phase() - Find DQS enable backup phase
1646 * @grp: Read/Write group
1647 * @work_bgn: Working window start position
1648 * @p: DQS Phase Iterator
1650 * Find DQS enable backup phase setting.
1652 static void sdr_backup_phase(const u32 grp
, u32
*work_bgn
, u32
*p
)
1657 /* Special case code for backing up a phase */
1659 *p
= iocfg
->dqs_en_phase_max
;
1660 rw_mgr_decr_vfifo(grp
);
1664 tmp_delay
= *work_bgn
- iocfg
->delay_per_opa_tap
;
1665 scc_mgr_set_dqs_en_phase_all_ranks(grp
, *p
);
1667 for (d
= 0; d
<= iocfg
->dqs_en_delay_max
&& tmp_delay
< *work_bgn
;
1669 scc_mgr_set_dqs_en_delay_all_ranks(grp
, d
);
1671 ret
= rw_mgr_mem_calibrate_read_test_all_ranks(grp
, 1,
1674 *work_bgn
= tmp_delay
;
1678 tmp_delay
+= iocfg
->delay_per_dqs_en_dchain_tap
;
1681 /* Restore VFIFO to old state before we decremented it (if needed). */
1683 if (*p
> iocfg
->dqs_en_phase_max
) {
1685 rw_mgr_incr_vfifo(grp
);
1688 scc_mgr_set_dqs_en_delay_all_ranks(grp
, 0);
1692 * sdr_nonworking_phase() - Find non-working DQS enable phase
1693 * @grp: Read/Write group
1694 * @work_end: Working window end position
1695 * @p: DQS Phase Iterator
1698 * Find non-working DQS enable phase setting.
1700 static int sdr_nonworking_phase(const u32 grp
, u32
*work_end
, u32
*p
, u32
*i
)
1705 *work_end
+= iocfg
->delay_per_opa_tap
;
1706 if (*p
> iocfg
->dqs_en_phase_max
) {
1707 /* Fiddle with FIFO. */
1709 rw_mgr_incr_vfifo(grp
);
1712 ret
= sdr_find_phase(0, grp
, work_end
, i
, p
);
1714 /* Cannot see edge of failing read. */
1715 debug_cond(DLEVEL
== 2, "%s:%d: end: failed\n",
1716 __func__
, __LINE__
);
1723 * sdr_find_window_center() - Find center of the working DQS window.
1724 * @grp: Read/Write group
1725 * @work_bgn: First working settings
1726 * @work_end: Last working settings
1728 * Find center of the working DQS enable window.
1730 static int sdr_find_window_center(const u32 grp
, const u32 work_bgn
,
1737 work_mid
= (work_bgn
+ work_end
) / 2;
1739 debug_cond(DLEVEL
== 2, "work_bgn=%d work_end=%d work_mid=%d\n",
1740 work_bgn
, work_end
, work_mid
);
1741 /* Get the middle delay to be less than a VFIFO delay */
1742 tmp_delay
= (iocfg
->dqs_en_phase_max
+ 1) * iocfg
->delay_per_opa_tap
;
1744 debug_cond(DLEVEL
== 2, "vfifo ptap delay %d\n", tmp_delay
);
1745 work_mid
%= tmp_delay
;
1746 debug_cond(DLEVEL
== 2, "new work_mid %d\n", work_mid
);
1748 tmp_delay
= rounddown(work_mid
, iocfg
->delay_per_opa_tap
);
1749 if (tmp_delay
> iocfg
->dqs_en_phase_max
* iocfg
->delay_per_opa_tap
)
1750 tmp_delay
= iocfg
->dqs_en_phase_max
* iocfg
->delay_per_opa_tap
;
1751 p
= tmp_delay
/ iocfg
->delay_per_opa_tap
;
1753 debug_cond(DLEVEL
== 2, "new p %d, tmp_delay=%d\n", p
, tmp_delay
);
1755 d
= DIV_ROUND_UP(work_mid
- tmp_delay
,
1756 iocfg
->delay_per_dqs_en_dchain_tap
);
1757 if (d
> iocfg
->dqs_en_delay_max
)
1758 d
= iocfg
->dqs_en_delay_max
;
1759 tmp_delay
+= d
* iocfg
->delay_per_dqs_en_dchain_tap
;
1761 debug_cond(DLEVEL
== 2, "new d %d, tmp_delay=%d\n", d
, tmp_delay
);
1763 scc_mgr_set_dqs_en_phase_all_ranks(grp
, p
);
1764 scc_mgr_set_dqs_en_delay_all_ranks(grp
, d
);
1767 * push vfifo until we can successfully calibrate. We can do this
1768 * because the largest possible margin in 1 VFIFO cycle.
1770 for (i
= 0; i
< misccfg
->read_valid_fifo_size
; i
++) {
1771 debug_cond(DLEVEL
== 2, "find_dqs_en_phase: center\n");
1772 if (rw_mgr_mem_calibrate_read_test_all_ranks(grp
, 1,
1775 debug_cond(DLEVEL
== 2,
1776 "%s:%d center: found: ptap=%u dtap=%u\n",
1777 __func__
, __LINE__
, p
, d
);
1781 /* Fiddle with FIFO. */
1782 rw_mgr_incr_vfifo(grp
);
1785 debug_cond(DLEVEL
== 2, "%s:%d center: failed.\n",
1786 __func__
, __LINE__
);
1791 * rw_mgr_mem_calibrate_vfifo_find_dqs_en_phase() - Find a good DQS enable to use
1792 * @grp: Read/Write Group
1794 * Find a good DQS enable to use.
1796 static int rw_mgr_mem_calibrate_vfifo_find_dqs_en_phase(const u32 grp
)
1800 u32 work_bgn
, work_end
;
1801 u32 found_passing_read
, found_failing_read
= 0, initial_failing_dtap
;
1804 debug("%s:%d %u\n", __func__
, __LINE__
, grp
);
1806 reg_file_set_sub_stage(CAL_SUBSTAGE_VFIFO_CENTER
);
1808 scc_mgr_set_dqs_en_delay_all_ranks(grp
, 0);
1809 scc_mgr_set_dqs_en_phase_all_ranks(grp
, 0);
1811 /* Step 0: Determine number of delay taps for each phase tap. */
1812 dtaps_per_ptap
= iocfg
->delay_per_opa_tap
/
1813 iocfg
->delay_per_dqs_en_dchain_tap
;
1815 /* Step 1: First push vfifo until we get a failing read. */
1816 find_vfifo_failing_read(grp
);
1818 /* Step 2: Find first working phase, increment in ptaps. */
1820 ret
= sdr_working_phase(grp
, &work_bgn
, &d
, &p
, &i
);
1824 work_end
= work_bgn
;
1827 * If d is 0 then the working window covers a phase tap and we can
1828 * follow the old procedure. Otherwise, we've found the beginning
1829 * and we need to increment the dtaps until we find the end.
1833 * Step 3a: If we have room, back off by one and
1834 * increment in dtaps.
1836 sdr_backup_phase(grp
, &work_bgn
, &p
);
1839 * Step 4a: go forward from working phase to non working
1840 * phase, increment in ptaps.
1842 ret
= sdr_nonworking_phase(grp
, &work_end
, &p
, &i
);
1846 /* Step 5a: Back off one from last, increment in dtaps. */
1848 /* Special case code for backing up a phase */
1850 p
= iocfg
->dqs_en_phase_max
;
1851 rw_mgr_decr_vfifo(grp
);
1856 work_end
-= iocfg
->delay_per_opa_tap
;
1857 scc_mgr_set_dqs_en_phase_all_ranks(grp
, p
);
1861 debug_cond(DLEVEL
== 2, "%s:%d p: ptap=%u\n",
1862 __func__
, __LINE__
, p
);
1865 /* The dtap increment to find the failing edge is done here. */
1866 sdr_find_phase_delay(0, 1, grp
, &work_end
,
1867 iocfg
->delay_per_dqs_en_dchain_tap
, &d
);
1869 /* Go back to working dtap */
1871 work_end
-= iocfg
->delay_per_dqs_en_dchain_tap
;
1873 debug_cond(DLEVEL
== 2,
1874 "%s:%d p/d: ptap=%u dtap=%u end=%u\n",
1875 __func__
, __LINE__
, p
, d
- 1, work_end
);
1877 if (work_end
< work_bgn
) {
1879 debug_cond(DLEVEL
== 2, "%s:%d end-2: failed\n",
1880 __func__
, __LINE__
);
1884 debug_cond(DLEVEL
== 2, "%s:%d found range [%u,%u]\n",
1885 __func__
, __LINE__
, work_bgn
, work_end
);
1888 * We need to calculate the number of dtaps that equal a ptap.
1889 * To do that we'll back up a ptap and re-find the edge of the
1890 * window using dtaps
1892 debug_cond(DLEVEL
== 2, "%s:%d calculate dtaps_per_ptap for tracking\n",
1893 __func__
, __LINE__
);
1895 /* Special case code for backing up a phase */
1897 p
= iocfg
->dqs_en_phase_max
;
1898 rw_mgr_decr_vfifo(grp
);
1899 debug_cond(DLEVEL
== 2, "%s:%d backedup cycle/phase: p=%u\n",
1900 __func__
, __LINE__
, p
);
1903 debug_cond(DLEVEL
== 2, "%s:%d backedup phase only: p=%u",
1904 __func__
, __LINE__
, p
);
1907 scc_mgr_set_dqs_en_phase_all_ranks(grp
, p
);
1910 * Increase dtap until we first see a passing read (in case the
1911 * window is smaller than a ptap), and then a failing read to
1912 * mark the edge of the window again.
1915 /* Find a passing read. */
1916 debug_cond(DLEVEL
== 2, "%s:%d find passing read\n",
1917 __func__
, __LINE__
);
1919 initial_failing_dtap
= d
;
1921 found_passing_read
= !sdr_find_phase_delay(1, 1, grp
, NULL
, 0, &d
);
1922 if (found_passing_read
) {
1923 /* Find a failing read. */
1924 debug_cond(DLEVEL
== 2, "%s:%d find failing read\n",
1925 __func__
, __LINE__
);
1927 found_failing_read
= !sdr_find_phase_delay(0, 1, grp
, NULL
, 0,
1930 debug_cond(DLEVEL
== 1,
1931 "%s:%d failed to calculate dtaps per ptap. Fall back on static value\n",
1932 __func__
, __LINE__
);
1936 * The dynamically calculated dtaps_per_ptap is only valid if we
1937 * found a passing/failing read. If we didn't, it means d hit the max
1938 * (iocfg->dqs_en_delay_max). Otherwise, dtaps_per_ptap retains its
1939 * statically calculated value.
1941 if (found_passing_read
&& found_failing_read
)
1942 dtaps_per_ptap
= d
- initial_failing_dtap
;
1944 writel(dtaps_per_ptap
, &sdr_reg_file
->dtaps_per_ptap
);
1945 debug_cond(DLEVEL
== 2, "%s:%d dtaps_per_ptap=%u - %u = %u",
1946 __func__
, __LINE__
, d
, initial_failing_dtap
, dtaps_per_ptap
);
1948 /* Step 6: Find the centre of the window. */
1949 ret
= sdr_find_window_center(grp
, work_bgn
, work_end
);
1955 * search_stop_check() - Check if the detected edge is valid
1956 * @write: Perform read (Stage 2) or write (Stage 3) calibration
1958 * @rank_bgn: Rank number
1959 * @write_group: Write Group
1960 * @read_group: Read Group
1961 * @bit_chk: Resulting bit mask after the test
1962 * @sticky_bit_chk: Resulting sticky bit mask after the test
1963 * @use_read_test: Perform read test
1965 * Test if the found edge is valid.
1967 static u32
search_stop_check(const int write
, const int d
, const int rank_bgn
,
1968 const u32 write_group
, const u32 read_group
,
1969 u32
*bit_chk
, u32
*sticky_bit_chk
,
1970 const u32 use_read_test
)
1972 const u32 ratio
= rwcfg
->mem_if_read_dqs_width
/
1973 rwcfg
->mem_if_write_dqs_width
;
1974 const u32 correct_mask
= write
? param
->write_correct_mask
:
1975 param
->read_correct_mask
;
1976 const u32 per_dqs
= write
? rwcfg
->mem_dq_per_write_dqs
:
1977 rwcfg
->mem_dq_per_read_dqs
;
1980 * Stop searching when the read test doesn't pass AND when
1981 * we've seen a passing read on every bit.
1983 if (write
) { /* WRITE-ONLY */
1984 ret
= !rw_mgr_mem_calibrate_write_test(rank_bgn
, write_group
,
1987 } else if (use_read_test
) { /* READ-ONLY */
1988 ret
= !rw_mgr_mem_calibrate_read_test(rank_bgn
, read_group
,
1990 PASS_ONE_BIT
, bit_chk
,
1992 } else { /* READ-ONLY */
1993 rw_mgr_mem_calibrate_write_test(rank_bgn
, write_group
, 0,
1994 PASS_ONE_BIT
, bit_chk
, 0);
1995 *bit_chk
= *bit_chk
>> (per_dqs
*
1996 (read_group
- (write_group
* ratio
)));
1997 ret
= (*bit_chk
== 0);
1999 *sticky_bit_chk
= *sticky_bit_chk
| *bit_chk
;
2000 ret
= ret
&& (*sticky_bit_chk
== correct_mask
);
2001 debug_cond(DLEVEL
== 2,
2002 "%s:%d center(left): dtap=%u => %u == %u && %u",
2003 __func__
, __LINE__
, d
,
2004 *sticky_bit_chk
, correct_mask
, ret
);
2009 * search_left_edge() - Find left edge of DQ/DQS working phase
2010 * @write: Perform read (Stage 2) or write (Stage 3) calibration
2011 * @rank_bgn: Rank number
2012 * @write_group: Write Group
2013 * @read_group: Read Group
2014 * @test_bgn: Rank number to begin the test
2015 * @sticky_bit_chk: Resulting sticky bit mask after the test
2016 * @left_edge: Left edge of the DQ/DQS phase
2017 * @right_edge: Right edge of the DQ/DQS phase
2018 * @use_read_test: Perform read test
2020 * Find left edge of DQ/DQS working phase.
2022 static void search_left_edge(const int write
, const int rank_bgn
,
2023 const u32 write_group
, const u32 read_group
, const u32 test_bgn
,
2024 u32
*sticky_bit_chk
,
2025 int *left_edge
, int *right_edge
, const u32 use_read_test
)
2027 const u32 delay_max
= write
? iocfg
->io_out1_delay_max
:
2028 iocfg
->io_in_delay_max
;
2029 const u32 dqs_max
= write
? iocfg
->io_out1_delay_max
:
2030 iocfg
->dqs_in_delay_max
;
2031 const u32 per_dqs
= write
? rwcfg
->mem_dq_per_write_dqs
:
2032 rwcfg
->mem_dq_per_read_dqs
;
2036 for (d
= 0; d
<= dqs_max
; d
++) {
2038 scc_mgr_apply_group_dq_out1_delay(d
);
2040 scc_mgr_apply_group_dq_in_delay(test_bgn
, d
);
2042 writel(0, &sdr_scc_mgr
->update
);
2044 stop
= search_stop_check(write
, d
, rank_bgn
, write_group
,
2045 read_group
, &bit_chk
, sticky_bit_chk
,
2051 for (i
= 0; i
< per_dqs
; i
++) {
2054 * Remember a passing test as
2060 * If a left edge has not been seen
2061 * yet, then a future passing test
2062 * will mark this edge as the right
2065 if (left_edge
[i
] == delay_max
+ 1)
2066 right_edge
[i
] = -(d
+ 1);
2072 /* Reset DQ delay chains to 0 */
2074 scc_mgr_apply_group_dq_out1_delay(0);
2076 scc_mgr_apply_group_dq_in_delay(test_bgn
, 0);
2078 *sticky_bit_chk
= 0;
2079 for (i
= per_dqs
- 1; i
>= 0; i
--) {
2080 debug_cond(DLEVEL
== 2,
2081 "%s:%d vfifo_center: left_edge[%u]: %d right_edge[%u]: %d\n",
2082 __func__
, __LINE__
, i
, left_edge
[i
],
2086 * Check for cases where we haven't found the left edge,
2087 * which makes our assignment of the the right edge invalid.
2088 * Reset it to the illegal value.
2090 if ((left_edge
[i
] == delay_max
+ 1) &&
2091 (right_edge
[i
] != delay_max
+ 1)) {
2092 right_edge
[i
] = delay_max
+ 1;
2093 debug_cond(DLEVEL
== 2,
2094 "%s:%d vfifo_center: reset right_edge[%u]: %d\n",
2095 __func__
, __LINE__
, i
, right_edge
[i
]);
2100 * READ: except for bits where we have seen both
2101 * the left and right edge.
2102 * WRITE: except for bits where we have seen the
2105 *sticky_bit_chk
<<= 1;
2107 if (left_edge
[i
] != delay_max
+ 1)
2108 *sticky_bit_chk
|= 1;
2110 if ((left_edge
[i
] != delay_max
+ 1) &&
2111 (right_edge
[i
] != delay_max
+ 1))
2112 *sticky_bit_chk
|= 1;
2118 * search_right_edge() - Find right edge of DQ/DQS working phase
2119 * @write: Perform read (Stage 2) or write (Stage 3) calibration
2120 * @rank_bgn: Rank number
2121 * @write_group: Write Group
2122 * @read_group: Read Group
2123 * @start_dqs: DQS start phase
2124 * @start_dqs_en: DQS enable start phase
2125 * @sticky_bit_chk: Resulting sticky bit mask after the test
2126 * @left_edge: Left edge of the DQ/DQS phase
2127 * @right_edge: Right edge of the DQ/DQS phase
2128 * @use_read_test: Perform read test
2130 * Find right edge of DQ/DQS working phase.
2132 static int search_right_edge(const int write
, const int rank_bgn
,
2133 const u32 write_group
, const u32 read_group
,
2134 const int start_dqs
, const int start_dqs_en
,
2135 u32
*sticky_bit_chk
,
2136 int *left_edge
, int *right_edge
, const u32 use_read_test
)
2138 const u32 delay_max
= write
? iocfg
->io_out1_delay_max
:
2139 iocfg
->io_in_delay_max
;
2140 const u32 dqs_max
= write
? iocfg
->io_out1_delay_max
:
2141 iocfg
->dqs_in_delay_max
;
2142 const u32 per_dqs
= write
? rwcfg
->mem_dq_per_write_dqs
:
2143 rwcfg
->mem_dq_per_read_dqs
;
2147 for (d
= 0; d
<= dqs_max
- start_dqs
; d
++) {
2148 if (write
) { /* WRITE-ONLY */
2149 scc_mgr_apply_group_dqs_io_and_oct_out1(write_group
,
2151 } else { /* READ-ONLY */
2152 scc_mgr_set_dqs_bus_in_delay(read_group
, d
+ start_dqs
);
2153 if (iocfg
->shift_dqs_en_when_shift_dqs
) {
2154 u32 delay
= d
+ start_dqs_en
;
2155 if (delay
> iocfg
->dqs_en_delay_max
)
2156 delay
= iocfg
->dqs_en_delay_max
;
2157 scc_mgr_set_dqs_en_delay(read_group
, delay
);
2159 scc_mgr_load_dqs(read_group
);
2162 writel(0, &sdr_scc_mgr
->update
);
2164 stop
= search_stop_check(write
, d
, rank_bgn
, write_group
,
2165 read_group
, &bit_chk
, sticky_bit_chk
,
2168 if (write
&& (d
== 0)) { /* WRITE-ONLY */
2169 for (i
= 0; i
< rwcfg
->mem_dq_per_write_dqs
;
2172 * d = 0 failed, but it passed when
2173 * testing the left edge, so it must be
2174 * marginal, set it to -1
2176 if (right_edge
[i
] == delay_max
+ 1 &&
2177 left_edge
[i
] != delay_max
+ 1)
2185 for (i
= 0; i
< per_dqs
; i
++) {
2188 * Remember a passing test as
2195 * If a right edge has not
2196 * been seen yet, then a future
2197 * passing test will mark this
2198 * edge as the left edge.
2200 if (right_edge
[i
] == delay_max
+ 1)
2201 left_edge
[i
] = -(d
+ 1);
2204 * d = 0 failed, but it passed
2205 * when testing the left edge,
2206 * so it must be marginal, set
2209 if (right_edge
[i
] == delay_max
+ 1 &&
2210 left_edge
[i
] != delay_max
+ 1)
2213 * If a right edge has not been
2214 * seen yet, then a future
2215 * passing test will mark this
2216 * edge as the left edge.
2218 else if (right_edge
[i
] == delay_max
+ 1)
2219 left_edge
[i
] = -(d
+ 1);
2223 debug_cond(DLEVEL
== 2, "%s:%d center[r,d=%u]: ",
2224 __func__
, __LINE__
, d
);
2225 debug_cond(DLEVEL
== 2,
2226 "bit_chk_test=%i left_edge[%u]: %d ",
2227 bit_chk
& 1, i
, left_edge
[i
]);
2228 debug_cond(DLEVEL
== 2, "right_edge[%u]: %d\n", i
,
2234 /* Check that all bits have a window */
2235 for (i
= 0; i
< per_dqs
; i
++) {
2236 debug_cond(DLEVEL
== 2,
2237 "%s:%d write_center: left_edge[%u]: %d right_edge[%u]: %d",
2238 __func__
, __LINE__
, i
, left_edge
[i
],
2240 if ((left_edge
[i
] == dqs_max
+ 1) ||
2241 (right_edge
[i
] == dqs_max
+ 1))
2242 return i
+ 1; /* FIXME: If we fail, retval > 0 */
2249 * get_window_mid_index() - Find the best middle setting of DQ/DQS phase
2250 * @write: Perform read (Stage 2) or write (Stage 3) calibration
2251 * @left_edge: Left edge of the DQ/DQS phase
2252 * @right_edge: Right edge of the DQ/DQS phase
2253 * @mid_min: Best DQ/DQS phase middle setting
2255 * Find index and value of the middle of the DQ/DQS working phase.
2257 static int get_window_mid_index(const int write
, int *left_edge
,
2258 int *right_edge
, int *mid_min
)
2260 const u32 per_dqs
= write
? rwcfg
->mem_dq_per_write_dqs
:
2261 rwcfg
->mem_dq_per_read_dqs
;
2262 int i
, mid
, min_index
;
2264 /* Find middle of window for each DQ bit */
2265 *mid_min
= left_edge
[0] - right_edge
[0];
2267 for (i
= 1; i
< per_dqs
; i
++) {
2268 mid
= left_edge
[i
] - right_edge
[i
];
2269 if (mid
< *mid_min
) {
2276 * -mid_min/2 represents the amount that we need to move DQS.
2277 * If mid_min is odd and positive we'll need to add one to make
2278 * sure the rounding in further calculations is correct (always
2279 * bias to the right), so just add 1 for all positive values.
2283 *mid_min
= *mid_min
/ 2;
2285 debug_cond(DLEVEL
== 1, "%s:%d vfifo_center: *mid_min=%d (index=%u)\n",
2286 __func__
, __LINE__
, *mid_min
, min_index
);
2291 * center_dq_windows() - Center the DQ/DQS windows
2292 * @write: Perform read (Stage 2) or write (Stage 3) calibration
2293 * @left_edge: Left edge of the DQ/DQS phase
2294 * @right_edge: Right edge of the DQ/DQS phase
2295 * @mid_min: Adjusted DQ/DQS phase middle setting
2296 * @orig_mid_min: Original DQ/DQS phase middle setting
2297 * @min_index: DQ/DQS phase middle setting index
2298 * @test_bgn: Rank number to begin the test
2299 * @dq_margin: Amount of shift for the DQ
2300 * @dqs_margin: Amount of shift for the DQS
2302 * Align the DQ/DQS windows in each group.
2304 static void center_dq_windows(const int write
, int *left_edge
, int *right_edge
,
2305 const int mid_min
, const int orig_mid_min
,
2306 const int min_index
, const int test_bgn
,
2307 int *dq_margin
, int *dqs_margin
)
2309 const u32 delay_max
= write
? iocfg
->io_out1_delay_max
:
2310 iocfg
->io_in_delay_max
;
2311 const u32 per_dqs
= write
? rwcfg
->mem_dq_per_write_dqs
:
2312 rwcfg
->mem_dq_per_read_dqs
;
2313 const u32 delay_off
= write
? SCC_MGR_IO_OUT1_DELAY_OFFSET
:
2314 SCC_MGR_IO_IN_DELAY_OFFSET
;
2315 const u32 addr
= SDR_PHYGRP_SCCGRP_ADDRESS
| delay_off
;
2317 u32 temp_dq_io_delay1
, temp_dq_io_delay2
;
2320 /* Initialize data for export structures */
2321 *dqs_margin
= delay_max
+ 1;
2322 *dq_margin
= delay_max
+ 1;
2324 /* add delay to bring centre of all DQ windows to the same "level" */
2325 for (i
= 0, p
= test_bgn
; i
< per_dqs
; i
++, p
++) {
2326 /* Use values before divide by 2 to reduce round off error */
2327 shift_dq
= (left_edge
[i
] - right_edge
[i
] -
2328 (left_edge
[min_index
] - right_edge
[min_index
]))/2 +
2329 (orig_mid_min
- mid_min
);
2331 debug_cond(DLEVEL
== 2,
2332 "vfifo_center: before: shift_dq[%u]=%d\n",
2335 temp_dq_io_delay1
= readl(addr
+ (p
<< 2));
2336 temp_dq_io_delay2
= readl(addr
+ (i
<< 2));
2338 if (shift_dq
+ temp_dq_io_delay1
> delay_max
)
2339 shift_dq
= delay_max
- temp_dq_io_delay2
;
2340 else if (shift_dq
+ temp_dq_io_delay1
< 0)
2341 shift_dq
= -temp_dq_io_delay1
;
2343 debug_cond(DLEVEL
== 2,
2344 "vfifo_center: after: shift_dq[%u]=%d\n",
2348 scc_mgr_set_dq_out1_delay(i
,
2349 temp_dq_io_delay1
+ shift_dq
);
2351 scc_mgr_set_dq_in_delay(p
,
2352 temp_dq_io_delay1
+ shift_dq
);
2356 debug_cond(DLEVEL
== 2,
2357 "vfifo_center: margin[%u]=[%d,%d]\n", i
,
2358 left_edge
[i
] - shift_dq
+ (-mid_min
),
2359 right_edge
[i
] + shift_dq
- (-mid_min
));
2361 /* To determine values for export structures */
2362 if (left_edge
[i
] - shift_dq
+ (-mid_min
) < *dq_margin
)
2363 *dq_margin
= left_edge
[i
] - shift_dq
+ (-mid_min
);
2365 if (right_edge
[i
] + shift_dq
- (-mid_min
) < *dqs_margin
)
2366 *dqs_margin
= right_edge
[i
] + shift_dq
- (-mid_min
);
2371 * rw_mgr_mem_calibrate_vfifo_center() - Per-bit deskew DQ and centering
2372 * @rank_bgn: Rank number
2373 * @rw_group: Read/Write Group
2374 * @test_bgn: Rank at which the test begins
2375 * @use_read_test: Perform a read test
2376 * @update_fom: Update FOM
2378 * Per-bit deskew DQ and centering.
2380 static int rw_mgr_mem_calibrate_vfifo_center(const u32 rank_bgn
,
2381 const u32 rw_group
, const u32 test_bgn
,
2382 const int use_read_test
, const int update_fom
)
2385 SDR_PHYGRP_SCCGRP_ADDRESS
+ SCC_MGR_DQS_IN_DELAY_OFFSET
+
2388 * Store these as signed since there are comparisons with
2392 int32_t left_edge
[rwcfg
->mem_dq_per_read_dqs
];
2393 int32_t right_edge
[rwcfg
->mem_dq_per_read_dqs
];
2394 int32_t orig_mid_min
, mid_min
;
2395 int32_t new_dqs
, start_dqs
, start_dqs_en
= 0, final_dqs_en
;
2396 int32_t dq_margin
, dqs_margin
;
2400 debug("%s:%d: %u %u", __func__
, __LINE__
, rw_group
, test_bgn
);
2402 start_dqs
= readl(addr
);
2403 if (iocfg
->shift_dqs_en_when_shift_dqs
)
2404 start_dqs_en
= readl(addr
- iocfg
->dqs_en_delay_offset
);
2406 /* set the left and right edge of each bit to an illegal value */
2407 /* use (iocfg->io_in_delay_max + 1) as an illegal value */
2409 for (i
= 0; i
< rwcfg
->mem_dq_per_read_dqs
; i
++) {
2410 left_edge
[i
] = iocfg
->io_in_delay_max
+ 1;
2411 right_edge
[i
] = iocfg
->io_in_delay_max
+ 1;
2414 /* Search for the left edge of the window for each bit */
2415 search_left_edge(0, rank_bgn
, rw_group
, rw_group
, test_bgn
,
2417 left_edge
, right_edge
, use_read_test
);
2420 /* Search for the right edge of the window for each bit */
2421 ret
= search_right_edge(0, rank_bgn
, rw_group
, rw_group
,
2422 start_dqs
, start_dqs_en
,
2424 left_edge
, right_edge
, use_read_test
);
2427 * Restore delay chain settings before letting the loop
2428 * in rw_mgr_mem_calibrate_vfifo to retry different
2429 * dqs/ck relationships.
2431 scc_mgr_set_dqs_bus_in_delay(rw_group
, start_dqs
);
2432 if (iocfg
->shift_dqs_en_when_shift_dqs
)
2433 scc_mgr_set_dqs_en_delay(rw_group
, start_dqs_en
);
2435 scc_mgr_load_dqs(rw_group
);
2436 writel(0, &sdr_scc_mgr
->update
);
2438 debug_cond(DLEVEL
== 1,
2439 "%s:%d vfifo_center: failed to find edge [%u]: %d %d",
2440 __func__
, __LINE__
, i
, left_edge
[i
], right_edge
[i
]);
2441 if (use_read_test
) {
2442 set_failing_group_stage(rw_group
*
2443 rwcfg
->mem_dq_per_read_dqs
+ i
,
2445 CAL_SUBSTAGE_VFIFO_CENTER
);
2447 set_failing_group_stage(rw_group
*
2448 rwcfg
->mem_dq_per_read_dqs
+ i
,
2449 CAL_STAGE_VFIFO_AFTER_WRITES
,
2450 CAL_SUBSTAGE_VFIFO_CENTER
);
2455 min_index
= get_window_mid_index(0, left_edge
, right_edge
, &mid_min
);
2457 /* Determine the amount we can change DQS (which is -mid_min) */
2458 orig_mid_min
= mid_min
;
2459 new_dqs
= start_dqs
- mid_min
;
2460 if (new_dqs
> iocfg
->dqs_in_delay_max
)
2461 new_dqs
= iocfg
->dqs_in_delay_max
;
2462 else if (new_dqs
< 0)
2465 mid_min
= start_dqs
- new_dqs
;
2466 debug_cond(DLEVEL
== 1, "vfifo_center: new mid_min=%d new_dqs=%d\n",
2469 if (iocfg
->shift_dqs_en_when_shift_dqs
) {
2470 if (start_dqs_en
- mid_min
> iocfg
->dqs_en_delay_max
)
2471 mid_min
+= start_dqs_en
- mid_min
-
2472 iocfg
->dqs_en_delay_max
;
2473 else if (start_dqs_en
- mid_min
< 0)
2474 mid_min
+= start_dqs_en
- mid_min
;
2476 new_dqs
= start_dqs
- mid_min
;
2478 debug_cond(DLEVEL
== 1,
2479 "vfifo_center: start_dqs=%d start_dqs_en=%d new_dqs=%d mid_min=%d\n",
2481 iocfg
->shift_dqs_en_when_shift_dqs
? start_dqs_en
: -1,
2484 /* Add delay to bring centre of all DQ windows to the same "level". */
2485 center_dq_windows(0, left_edge
, right_edge
, mid_min
, orig_mid_min
,
2486 min_index
, test_bgn
, &dq_margin
, &dqs_margin
);
2489 if (iocfg
->shift_dqs_en_when_shift_dqs
) {
2490 final_dqs_en
= start_dqs_en
- mid_min
;
2491 scc_mgr_set_dqs_en_delay(rw_group
, final_dqs_en
);
2492 scc_mgr_load_dqs(rw_group
);
2496 scc_mgr_set_dqs_bus_in_delay(rw_group
, new_dqs
);
2497 scc_mgr_load_dqs(rw_group
);
2498 debug_cond(DLEVEL
== 2,
2499 "%s:%d vfifo_center: dq_margin=%d dqs_margin=%d",
2500 __func__
, __LINE__
, dq_margin
, dqs_margin
);
2503 * Do not remove this line as it makes sure all of our decisions
2504 * have been applied. Apply the update bit.
2506 writel(0, &sdr_scc_mgr
->update
);
2508 if ((dq_margin
< 0) || (dqs_margin
< 0))
2515 * rw_mgr_mem_calibrate_guaranteed_write() - Perform guaranteed write into the device
2516 * @rw_group: Read/Write Group
2517 * @phase: DQ/DQS phase
2519 * Because initially no communication ca be reliably performed with the memory
2520 * device, the sequencer uses a guaranteed write mechanism to write data into
2521 * the memory device.
2523 static int rw_mgr_mem_calibrate_guaranteed_write(const u32 rw_group
,
2528 /* Set a particular DQ/DQS phase. */
2529 scc_mgr_set_dqdqs_output_phase_all_ranks(rw_group
, phase
);
2531 debug_cond(DLEVEL
== 1, "%s:%d guaranteed write: g=%u p=%u\n",
2532 __func__
, __LINE__
, rw_group
, phase
);
2535 * Altera EMI_RM 2015.05.04 :: Figure 1-25
2536 * Load up the patterns used by read calibration using the
2537 * current DQDQS phase.
2539 rw_mgr_mem_calibrate_read_load_patterns(0, 1);
2541 if (gbl
->phy_debug_mode_flags
& PHY_DEBUG_DISABLE_GUARANTEED_READ
)
2545 * Altera EMI_RM 2015.05.04 :: Figure 1-26
2546 * Back-to-Back reads of the patterns used for calibration.
2548 ret
= rw_mgr_mem_calibrate_read_test_patterns(0, rw_group
, 1);
2550 debug_cond(DLEVEL
== 1,
2551 "%s:%d Guaranteed read test failed: g=%u p=%u\n",
2552 __func__
, __LINE__
, rw_group
, phase
);
2557 * rw_mgr_mem_calibrate_dqs_enable_calibration() - DQS Enable Calibration
2558 * @rw_group: Read/Write Group
2559 * @test_bgn: Rank at which the test begins
2561 * DQS enable calibration ensures reliable capture of the DQ signal without
2562 * glitches on the DQS line.
2564 static int rw_mgr_mem_calibrate_dqs_enable_calibration(const u32 rw_group
,
2568 * Altera EMI_RM 2015.05.04 :: Figure 1-27
2569 * DQS and DQS Eanble Signal Relationships.
2572 /* We start at zero, so have one less dq to devide among */
2573 const u32 delay_step
= iocfg
->io_in_delay_max
/
2574 (rwcfg
->mem_dq_per_read_dqs
- 1);
2578 debug("%s:%d (%u,%u)\n", __func__
, __LINE__
, rw_group
, test_bgn
);
2580 /* Try different dq_in_delays since the DQ path is shorter than DQS. */
2581 for (r
= 0; r
< rwcfg
->mem_number_of_ranks
;
2582 r
+= NUM_RANKS_PER_SHADOW_REG
) {
2583 for (i
= 0, p
= test_bgn
, d
= 0;
2584 i
< rwcfg
->mem_dq_per_read_dqs
;
2585 i
++, p
++, d
+= delay_step
) {
2586 debug_cond(DLEVEL
== 1,
2587 "%s:%d: g=%u r=%u i=%u p=%u d=%u\n",
2588 __func__
, __LINE__
, rw_group
, r
, i
, p
, d
);
2590 scc_mgr_set_dq_in_delay(p
, d
);
2594 writel(0, &sdr_scc_mgr
->update
);
2598 * Try rw_mgr_mem_calibrate_vfifo_find_dqs_en_phase across different
2599 * dq_in_delay values
2601 ret
= rw_mgr_mem_calibrate_vfifo_find_dqs_en_phase(rw_group
);
2603 debug_cond(DLEVEL
== 1,
2604 "%s:%d: g=%u found=%u; Reseting delay chain to zero\n",
2605 __func__
, __LINE__
, rw_group
, !ret
);
2607 for (r
= 0; r
< rwcfg
->mem_number_of_ranks
;
2608 r
+= NUM_RANKS_PER_SHADOW_REG
) {
2609 scc_mgr_apply_group_dq_in_delay(test_bgn
, 0);
2610 writel(0, &sdr_scc_mgr
->update
);
2617 * rw_mgr_mem_calibrate_dq_dqs_centering() - Centering DQ/DQS
2618 * @rw_group: Read/Write Group
2619 * @test_bgn: Rank at which the test begins
2620 * @use_read_test: Perform a read test
2621 * @update_fom: Update FOM
2623 * The centerin DQ/DQS stage attempts to align DQ and DQS signals on reads
2627 rw_mgr_mem_calibrate_dq_dqs_centering(const u32 rw_group
, const u32 test_bgn
,
2628 const int use_read_test
,
2629 const int update_fom
)
2632 int ret
, grp_calibrated
;
2636 * Altera EMI_RM 2015.05.04 :: Figure 1-28
2637 * Read per-bit deskew can be done on a per shadow register basis.
2640 for (rank_bgn
= 0, sr
= 0;
2641 rank_bgn
< rwcfg
->mem_number_of_ranks
;
2642 rank_bgn
+= NUM_RANKS_PER_SHADOW_REG
, sr
++) {
2643 ret
= rw_mgr_mem_calibrate_vfifo_center(rank_bgn
, rw_group
,
2653 if (!grp_calibrated
)
2660 * rw_mgr_mem_calibrate_vfifo() - Calibrate the read valid prediction FIFO
2661 * @rw_group: Read/Write Group
2662 * @test_bgn: Rank at which the test begins
2664 * Stage 1: Calibrate the read valid prediction FIFO.
2666 * This function implements UniPHY calibration Stage 1, as explained in
2667 * detail in Altera EMI_RM 2015.05.04 , "UniPHY Calibration Stages".
2669 * - read valid prediction will consist of finding:
2670 * - DQS enable phase and DQS enable delay (DQS Enable Calibration)
2671 * - DQS input phase and DQS input delay (DQ/DQS Centering)
2672 * - we also do a per-bit deskew on the DQ lines.
2674 static int rw_mgr_mem_calibrate_vfifo(const u32 rw_group
, const u32 test_bgn
)
2678 u32 failed_substage
;
2682 debug("%s:%d: %u %u\n", __func__
, __LINE__
, rw_group
, test_bgn
);
2684 /* Update info for sims */
2685 reg_file_set_group(rw_group
);
2686 reg_file_set_stage(CAL_STAGE_VFIFO
);
2687 reg_file_set_sub_stage(CAL_SUBSTAGE_GUARANTEED_READ
);
2689 failed_substage
= CAL_SUBSTAGE_GUARANTEED_READ
;
2691 /* USER Determine number of delay taps for each phase tap. */
2692 dtaps_per_ptap
= DIV_ROUND_UP(iocfg
->delay_per_opa_tap
,
2693 iocfg
->delay_per_dqs_en_dchain_tap
) - 1;
2695 for (d
= 0; d
<= dtaps_per_ptap
; d
+= 2) {
2697 * In RLDRAMX we may be messing the delay of pins in
2698 * the same write rw_group but outside of the current read
2699 * the rw_group, but that's ok because we haven't calibrated
2703 scc_mgr_apply_group_all_out_delay_add_all_ranks(
2707 for (p
= 0; p
<= iocfg
->dqdqs_out_phase_max
; p
++) {
2708 /* 1) Guaranteed Write */
2709 ret
= rw_mgr_mem_calibrate_guaranteed_write(rw_group
, p
);
2713 /* 2) DQS Enable Calibration */
2714 ret
= rw_mgr_mem_calibrate_dqs_enable_calibration(rw_group
,
2717 failed_substage
= CAL_SUBSTAGE_DQS_EN_PHASE
;
2721 /* 3) Centering DQ/DQS */
2723 * If doing read after write calibration, do not update
2724 * FOM now. Do it then.
2726 ret
= rw_mgr_mem_calibrate_dq_dqs_centering(rw_group
,
2729 failed_substage
= CAL_SUBSTAGE_VFIFO_CENTER
;
2738 /* Calibration Stage 1 failed. */
2739 set_failing_group_stage(rw_group
, CAL_STAGE_VFIFO
, failed_substage
);
2742 /* Calibration Stage 1 completed OK. */
2745 * Reset the delay chains back to zero if they have moved > 1
2746 * (check for > 1 because loop will increase d even when pass in
2750 scc_mgr_zero_group(rw_group
, 1);
2756 * rw_mgr_mem_calibrate_vfifo_end() - DQ/DQS Centering.
2757 * @rw_group: Read/Write Group
2758 * @test_bgn: Rank at which the test begins
2760 * Stage 3: DQ/DQS Centering.
2762 * This function implements UniPHY calibration Stage 3, as explained in
2763 * detail in Altera EMI_RM 2015.05.04 , "UniPHY Calibration Stages".
2765 static int rw_mgr_mem_calibrate_vfifo_end(const u32 rw_group
,
2770 debug("%s:%d %u %u", __func__
, __LINE__
, rw_group
, test_bgn
);
2772 /* Update info for sims. */
2773 reg_file_set_group(rw_group
);
2774 reg_file_set_stage(CAL_STAGE_VFIFO_AFTER_WRITES
);
2775 reg_file_set_sub_stage(CAL_SUBSTAGE_VFIFO_CENTER
);
2777 ret
= rw_mgr_mem_calibrate_dq_dqs_centering(rw_group
, test_bgn
, 0, 1);
2779 set_failing_group_stage(rw_group
,
2780 CAL_STAGE_VFIFO_AFTER_WRITES
,
2781 CAL_SUBSTAGE_VFIFO_CENTER
);
2786 * rw_mgr_mem_calibrate_lfifo() - Minimize latency
2788 * Stage 4: Minimize latency.
2790 * This function implements UniPHY calibration Stage 4, as explained in
2791 * detail in Altera EMI_RM 2015.05.04 , "UniPHY Calibration Stages".
2792 * Calibrate LFIFO to find smallest read latency.
2794 static u32
rw_mgr_mem_calibrate_lfifo(void)
2798 debug("%s:%d\n", __func__
, __LINE__
);
2800 /* Update info for sims. */
2801 reg_file_set_stage(CAL_STAGE_LFIFO
);
2802 reg_file_set_sub_stage(CAL_SUBSTAGE_READ_LATENCY
);
2804 /* Load up the patterns used by read calibration for all ranks */
2805 rw_mgr_mem_calibrate_read_load_patterns(0, 1);
2808 writel(gbl
->curr_read_lat
, &phy_mgr_cfg
->phy_rlat
);
2809 debug_cond(DLEVEL
== 2, "%s:%d lfifo: read_lat=%u",
2810 __func__
, __LINE__
, gbl
->curr_read_lat
);
2812 if (!rw_mgr_mem_calibrate_read_test_all_ranks(0, NUM_READ_TESTS
,
2818 * Reduce read latency and see if things are
2819 * working correctly.
2821 gbl
->curr_read_lat
--;
2822 } while (gbl
->curr_read_lat
> 0);
2824 /* Reset the fifos to get pointers to known state. */
2825 writel(0, &phy_mgr_cmd
->fifo_reset
);
2828 /* Add a fudge factor to the read latency that was determined */
2829 gbl
->curr_read_lat
+= 2;
2830 writel(gbl
->curr_read_lat
, &phy_mgr_cfg
->phy_rlat
);
2831 debug_cond(DLEVEL
== 2,
2832 "%s:%d lfifo: success: using read_lat=%u\n",
2833 __func__
, __LINE__
, gbl
->curr_read_lat
);
2835 set_failing_group_stage(0xff, CAL_STAGE_LFIFO
,
2836 CAL_SUBSTAGE_READ_LATENCY
);
2838 debug_cond(DLEVEL
== 2,
2839 "%s:%d lfifo: failed at initial read_lat=%u\n",
2840 __func__
, __LINE__
, gbl
->curr_read_lat
);
2847 * search_window() - Search for the/part of the window with DM/DQS shift
2848 * @search_dm: If 1, search for the DM shift, if 0, search for DQS shift
2849 * @rank_bgn: Rank number
2850 * @write_group: Write Group
2851 * @bgn_curr: Current window begin
2852 * @end_curr: Current window end
2853 * @bgn_best: Current best window begin
2854 * @end_best: Current best window end
2855 * @win_best: Size of the best window
2856 * @new_dqs: New DQS value (only applicable if search_dm = 0).
2858 * Search for the/part of the window with DM/DQS shift.
2860 static void search_window(const int search_dm
,
2861 const u32 rank_bgn
, const u32 write_group
,
2862 int *bgn_curr
, int *end_curr
, int *bgn_best
,
2863 int *end_best
, int *win_best
, int new_dqs
)
2866 const int max
= iocfg
->io_out1_delay_max
- new_dqs
;
2869 /* Search for the/part of the window with DM/DQS shift. */
2870 for (di
= max
; di
>= 0; di
-= DELTA_D
) {
2873 scc_mgr_apply_group_dm_out1_delay(d
);
2875 /* For DQS, we go from 0...max */
2878 * Note: This only shifts DQS, so are we limiting
2879 * ourselves to width of DQ unnecessarily.
2881 scc_mgr_apply_group_dqs_io_and_oct_out1(write_group
,
2885 writel(0, &sdr_scc_mgr
->update
);
2887 if (rw_mgr_mem_calibrate_write_test(rank_bgn
, write_group
, 1,
2888 PASS_ALL_BITS
, &bit_chk
,
2890 /* Set current end of the window. */
2891 *end_curr
= search_dm
? -d
: d
;
2894 * If a starting edge of our window has not been seen
2895 * this is our current start of the DM window.
2897 if (*bgn_curr
== iocfg
->io_out1_delay_max
+ 1)
2898 *bgn_curr
= search_dm
? -d
: d
;
2901 * If current window is bigger than best seen.
2902 * Set best seen to be current window.
2904 if ((*end_curr
- *bgn_curr
+ 1) > *win_best
) {
2905 *win_best
= *end_curr
- *bgn_curr
+ 1;
2906 *bgn_best
= *bgn_curr
;
2907 *end_best
= *end_curr
;
2910 /* We just saw a failing test. Reset temp edge. */
2911 *bgn_curr
= iocfg
->io_out1_delay_max
+ 1;
2912 *end_curr
= iocfg
->io_out1_delay_max
+ 1;
2914 /* Early exit is only applicable to DQS. */
2919 * Early exit optimization: if the remaining delay
2920 * chain space is less than already seen largest
2921 * window we can exit.
2923 if (*win_best
- 1 > iocfg
->io_out1_delay_max
- new_dqs
- d
)
2930 * rw_mgr_mem_calibrate_writes_center() - Center all windows
2931 * @rank_bgn: Rank number
2932 * @write_group: Write group
2933 * @test_bgn: Rank at which the test begins
2935 * Center all windows. Do per-bit-deskew to possibly increase size of
2939 rw_mgr_mem_calibrate_writes_center(const u32 rank_bgn
, const u32 write_group
,
2945 int left_edge
[rwcfg
->mem_dq_per_write_dqs
];
2946 int right_edge
[rwcfg
->mem_dq_per_write_dqs
];
2948 int mid_min
, orig_mid_min
;
2949 int new_dqs
, start_dqs
;
2950 int dq_margin
, dqs_margin
, dm_margin
;
2951 int bgn_curr
= iocfg
->io_out1_delay_max
+ 1;
2952 int end_curr
= iocfg
->io_out1_delay_max
+ 1;
2953 int bgn_best
= iocfg
->io_out1_delay_max
+ 1;
2954 int end_best
= iocfg
->io_out1_delay_max
+ 1;
2959 debug("%s:%d %u %u", __func__
, __LINE__
, write_group
, test_bgn
);
2963 start_dqs
= readl((SDR_PHYGRP_SCCGRP_ADDRESS
|
2964 SCC_MGR_IO_OUT1_DELAY_OFFSET
) +
2965 (rwcfg
->mem_dq_per_write_dqs
<< 2));
2967 /* Per-bit deskew. */
2970 * Set the left and right edge of each bit to an illegal value.
2971 * Use (iocfg->io_out1_delay_max + 1) as an illegal value.
2974 for (i
= 0; i
< rwcfg
->mem_dq_per_write_dqs
; i
++) {
2975 left_edge
[i
] = iocfg
->io_out1_delay_max
+ 1;
2976 right_edge
[i
] = iocfg
->io_out1_delay_max
+ 1;
2979 /* Search for the left edge of the window for each bit. */
2980 search_left_edge(1, rank_bgn
, write_group
, 0, test_bgn
,
2982 left_edge
, right_edge
, 0);
2984 /* Search for the right edge of the window for each bit. */
2985 ret
= search_right_edge(1, rank_bgn
, write_group
, 0,
2988 left_edge
, right_edge
, 0);
2990 set_failing_group_stage(test_bgn
+ ret
- 1, CAL_STAGE_WRITES
,
2991 CAL_SUBSTAGE_WRITES_CENTER
);
2995 min_index
= get_window_mid_index(1, left_edge
, right_edge
, &mid_min
);
2997 /* Determine the amount we can change DQS (which is -mid_min). */
2998 orig_mid_min
= mid_min
;
2999 new_dqs
= start_dqs
;
3001 debug_cond(DLEVEL
== 1,
3002 "%s:%d write_center: start_dqs=%d new_dqs=%d mid_min=%d\n",
3003 __func__
, __LINE__
, start_dqs
, new_dqs
, mid_min
);
3005 /* Add delay to bring centre of all DQ windows to the same "level". */
3006 center_dq_windows(1, left_edge
, right_edge
, mid_min
, orig_mid_min
,
3007 min_index
, 0, &dq_margin
, &dqs_margin
);
3010 scc_mgr_apply_group_dqs_io_and_oct_out1(write_group
, new_dqs
);
3011 writel(0, &sdr_scc_mgr
->update
);
3014 debug_cond(DLEVEL
== 2, "%s:%d write_center: DM\n", __func__
, __LINE__
);
3017 * Set the left and right edge of each bit to an illegal value.
3018 * Use (iocfg->io_out1_delay_max + 1) as an illegal value.
3020 left_edge
[0] = iocfg
->io_out1_delay_max
+ 1;
3021 right_edge
[0] = iocfg
->io_out1_delay_max
+ 1;
3023 /* Search for the/part of the window with DM shift. */
3024 search_window(1, rank_bgn
, write_group
, &bgn_curr
, &end_curr
,
3025 &bgn_best
, &end_best
, &win_best
, 0);
3027 /* Reset DM delay chains to 0. */
3028 scc_mgr_apply_group_dm_out1_delay(0);
3031 * Check to see if the current window nudges up aganist 0 delay.
3032 * If so we need to continue the search by shifting DQS otherwise DQS
3033 * search begins as a new search.
3035 if (end_curr
!= 0) {
3036 bgn_curr
= iocfg
->io_out1_delay_max
+ 1;
3037 end_curr
= iocfg
->io_out1_delay_max
+ 1;
3040 /* Search for the/part of the window with DQS shifts. */
3041 search_window(0, rank_bgn
, write_group
, &bgn_curr
, &end_curr
,
3042 &bgn_best
, &end_best
, &win_best
, new_dqs
);
3044 /* Assign left and right edge for cal and reporting. */
3045 left_edge
[0] = -1 * bgn_best
;
3046 right_edge
[0] = end_best
;
3048 debug_cond(DLEVEL
== 2, "%s:%d dm_calib: left=%d right=%d\n",
3049 __func__
, __LINE__
, left_edge
[0], right_edge
[0]);
3051 /* Move DQS (back to orig). */
3052 scc_mgr_apply_group_dqs_io_and_oct_out1(write_group
, new_dqs
);
3056 /* Find middle of window for the DM bit. */
3057 mid
= (left_edge
[0] - right_edge
[0]) / 2;
3059 /* Only move right, since we are not moving DQS/DQ. */
3063 /* dm_marign should fail if we never find a window. */
3067 dm_margin
= left_edge
[0] - mid
;
3069 scc_mgr_apply_group_dm_out1_delay(mid
);
3070 writel(0, &sdr_scc_mgr
->update
);
3072 debug_cond(DLEVEL
== 2,
3073 "%s:%d dm_calib: left=%d right=%d mid=%d dm_margin=%d\n",
3074 __func__
, __LINE__
, left_edge
[0], right_edge
[0],
3076 /* Export values. */
3077 gbl
->fom_out
+= dq_margin
+ dqs_margin
;
3079 debug_cond(DLEVEL
== 2,
3080 "%s:%d write_center: dq_margin=%d dqs_margin=%d dm_margin=%d\n",
3081 __func__
, __LINE__
, dq_margin
, dqs_margin
, dm_margin
);
3084 * Do not remove this line as it makes sure all of our
3085 * decisions have been applied.
3087 writel(0, &sdr_scc_mgr
->update
);
3089 if ((dq_margin
< 0) || (dqs_margin
< 0) || (dm_margin
< 0))
3096 * rw_mgr_mem_calibrate_writes() - Write Calibration Part One
3097 * @rank_bgn: Rank number
3098 * @group: Read/Write Group
3099 * @test_bgn: Rank at which the test begins
3101 * Stage 2: Write Calibration Part One.
3103 * This function implements UniPHY calibration Stage 2, as explained in
3104 * detail in Altera EMI_RM 2015.05.04 , "UniPHY Calibration Stages".
3106 static int rw_mgr_mem_calibrate_writes(const u32 rank_bgn
, const u32 group
,
3111 /* Update info for sims */
3112 debug("%s:%d %u %u\n", __func__
, __LINE__
, group
, test_bgn
);
3114 reg_file_set_group(group
);
3115 reg_file_set_stage(CAL_STAGE_WRITES
);
3116 reg_file_set_sub_stage(CAL_SUBSTAGE_WRITES_CENTER
);
3118 ret
= rw_mgr_mem_calibrate_writes_center(rank_bgn
, group
, test_bgn
);
3120 set_failing_group_stage(group
, CAL_STAGE_WRITES
,
3121 CAL_SUBSTAGE_WRITES_CENTER
);
3127 * mem_precharge_and_activate() - Precharge all banks and activate
3129 * Precharge all banks and activate row 0 in bank "000..." and bank "111...".
3131 static void mem_precharge_and_activate(void)
3135 for (r
= 0; r
< rwcfg
->mem_number_of_ranks
; r
++) {
3137 set_rank_and_odt_mask(r
, RW_MGR_ODT_MODE_OFF
);
3139 /* Precharge all banks. */
3140 writel(rwcfg
->precharge_all
, SDR_PHYGRP_RWMGRGRP_ADDRESS
|
3141 RW_MGR_RUN_SINGLE_GROUP_OFFSET
);
3143 writel(0x0F, &sdr_rw_load_mgr_regs
->load_cntr0
);
3144 writel(rwcfg
->activate_0_and_1_wait1
,
3145 &sdr_rw_load_jump_mgr_regs
->load_jump_add0
);
3147 writel(0x0F, &sdr_rw_load_mgr_regs
->load_cntr1
);
3148 writel(rwcfg
->activate_0_and_1_wait2
,
3149 &sdr_rw_load_jump_mgr_regs
->load_jump_add1
);
3151 /* Activate rows. */
3152 writel(rwcfg
->activate_0_and_1
, SDR_PHYGRP_RWMGRGRP_ADDRESS
|
3153 RW_MGR_RUN_SINGLE_GROUP_OFFSET
);
3158 * mem_init_latency() - Configure memory RLAT and WLAT settings
3160 * Configure memory RLAT and WLAT parameters.
3162 static void mem_init_latency(void)
3165 * For AV/CV, LFIFO is hardened and always runs at full rate
3166 * so max latency in AFI clocks, used here, is correspondingly
3169 const u32 max_latency
= (1 << misccfg
->max_latency_count_width
) - 1;
3172 debug("%s:%d\n", __func__
, __LINE__
);
3175 * Read in write latency.
3176 * WL for Hard PHY does not include additive latency.
3178 wlat
= readl(&data_mgr
->t_wl_add
);
3179 wlat
+= readl(&data_mgr
->mem_t_add
);
3181 gbl
->rw_wl_nop_cycles
= wlat
- 1;
3183 /* Read in readl latency. */
3184 rlat
= readl(&data_mgr
->t_rl_add
);
3186 /* Set a pretty high read latency initially. */
3187 gbl
->curr_read_lat
= rlat
+ 16;
3188 if (gbl
->curr_read_lat
> max_latency
)
3189 gbl
->curr_read_lat
= max_latency
;
3191 writel(gbl
->curr_read_lat
, &phy_mgr_cfg
->phy_rlat
);
3193 /* Advertise write latency. */
3194 writel(wlat
, &phy_mgr_cfg
->afi_wlat
);
3198 * @mem_skip_calibrate() - Set VFIFO and LFIFO to instant-on settings
3200 * Set VFIFO and LFIFO to instant-on settings in skip calibration mode.
3202 static void mem_skip_calibrate(void)
3207 debug("%s:%d\n", __func__
, __LINE__
);
3208 /* Need to update every shadow register set used by the interface */
3209 for (r
= 0; r
< rwcfg
->mem_number_of_ranks
;
3210 r
+= NUM_RANKS_PER_SHADOW_REG
) {
3212 * Set output phase alignment settings appropriate for
3215 for (i
= 0; i
< rwcfg
->mem_if_read_dqs_width
; i
++) {
3216 scc_mgr_set_dqs_en_phase(i
, 0);
3217 if (iocfg
->dll_chain_length
== 6)
3218 scc_mgr_set_dqdqs_output_phase(i
, 6);
3220 scc_mgr_set_dqdqs_output_phase(i
, 7);
3224 * Write data arrives to the I/O two cycles before write
3225 * latency is reached (720 deg).
3226 * -> due to bit-slip in a/c bus
3227 * -> to allow board skew where dqs is longer than ck
3228 * -> how often can this happen!?
3229 * -> can claim back some ptaps for high freq
3230 * support if we can relax this, but i digress...
3232 * The write_clk leads mem_ck by 90 deg
3233 * The minimum ptap of the OPA is 180 deg
3234 * Each ptap has (360 / IO_DLL_CHAIN_LENGH) deg of delay
3235 * The write_clk is always delayed by 2 ptaps
3237 * Hence, to make DQS aligned to CK, we need to delay
3239 * (720 - 90 - 180 - 2) *
3240 * (360 / iocfg->dll_chain_length)
3242 * Dividing the above by (360 / iocfg->dll_chain_length)
3243 * gives us the number of ptaps, which simplies to:
3245 * (1.25 * iocfg->dll_chain_length - 2)
3247 scc_mgr_set_dqdqs_output_phase(i
,
3248 ((125 * iocfg
->dll_chain_length
) / 100) - 2);
3250 writel(0xff, &sdr_scc_mgr
->dqs_ena
);
3251 writel(0xff, &sdr_scc_mgr
->dqs_io_ena
);
3253 for (i
= 0; i
< rwcfg
->mem_if_write_dqs_width
; i
++) {
3254 writel(i
, SDR_PHYGRP_SCCGRP_ADDRESS
|
3255 SCC_MGR_GROUP_COUNTER_OFFSET
);
3257 writel(0xff, &sdr_scc_mgr
->dq_ena
);
3258 writel(0xff, &sdr_scc_mgr
->dm_ena
);
3259 writel(0, &sdr_scc_mgr
->update
);
3262 /* Compensate for simulation model behaviour */
3263 for (i
= 0; i
< rwcfg
->mem_if_read_dqs_width
; i
++) {
3264 scc_mgr_set_dqs_bus_in_delay(i
, 10);
3265 scc_mgr_load_dqs(i
);
3267 writel(0, &sdr_scc_mgr
->update
);
3270 * ArriaV has hard FIFOs that can only be initialized by incrementing
3273 vfifo_offset
= misccfg
->calib_vfifo_offset
;
3274 for (j
= 0; j
< vfifo_offset
; j
++)
3275 writel(0xff, &phy_mgr_cmd
->inc_vfifo_hard_phy
);
3276 writel(0, &phy_mgr_cmd
->fifo_reset
);
3279 * For Arria V and Cyclone V with hard LFIFO, we get the skip-cal
3280 * setting from generation-time constant.
3282 gbl
->curr_read_lat
= misccfg
->calib_lfifo_offset
;
3283 writel(gbl
->curr_read_lat
, &phy_mgr_cfg
->phy_rlat
);
3287 * mem_calibrate() - Memory calibration entry point.
3289 * Perform memory calibration.
3291 static u32
mem_calibrate(void)
3295 u32 write_group
, write_test_bgn
;
3296 u32 read_group
, read_test_bgn
;
3297 u32 run_groups
, current_run
;
3298 u32 failing_groups
= 0;
3299 u32 group_failed
= 0;
3301 const u32 rwdqs_ratio
= rwcfg
->mem_if_read_dqs_width
/
3302 rwcfg
->mem_if_write_dqs_width
;
3304 debug("%s:%d\n", __func__
, __LINE__
);
3306 /* Initialize the data settings */
3307 gbl
->error_substage
= CAL_SUBSTAGE_NIL
;
3308 gbl
->error_stage
= CAL_STAGE_NIL
;
3309 gbl
->error_group
= 0xff;
3313 /* Initialize WLAT and RLAT. */
3316 /* Initialize bit slips. */
3317 mem_precharge_and_activate();
3319 for (i
= 0; i
< rwcfg
->mem_if_read_dqs_width
; i
++) {
3320 writel(i
, SDR_PHYGRP_SCCGRP_ADDRESS
|
3321 SCC_MGR_GROUP_COUNTER_OFFSET
);
3322 /* Only needed once to set all groups, pins, DQ, DQS, DM. */
3324 scc_mgr_set_hhp_extras();
3326 scc_set_bypass_mode(i
);
3329 /* Calibration is skipped. */
3330 if ((dyn_calib_steps
& CALIB_SKIP_ALL
) == CALIB_SKIP_ALL
) {
3332 * Set VFIFO and LFIFO to instant-on settings in skip
3335 mem_skip_calibrate();
3338 * Do not remove this line as it makes sure all of our
3339 * decisions have been applied.
3341 writel(0, &sdr_scc_mgr
->update
);
3345 /* Calibration is not skipped. */
3346 for (i
= 0; i
< NUM_CALIB_REPEAT
; i
++) {
3348 * Zero all delay chain/phase settings for all
3349 * groups and all shadow register sets.
3355 for (write_group
= 0, write_test_bgn
= 0; write_group
3356 < rwcfg
->mem_if_write_dqs_width
; write_group
++,
3357 write_test_bgn
+= rwcfg
->mem_dq_per_write_dqs
) {
3358 /* Initialize the group failure */
3361 current_run
= run_groups
& ((1 <<
3362 RW_MGR_NUM_DQS_PER_WRITE_GROUP
) - 1);
3363 run_groups
= run_groups
>>
3364 RW_MGR_NUM_DQS_PER_WRITE_GROUP
;
3366 if (current_run
== 0)
3369 writel(write_group
, SDR_PHYGRP_SCCGRP_ADDRESS
|
3370 SCC_MGR_GROUP_COUNTER_OFFSET
);
3371 scc_mgr_zero_group(write_group
, 0);
3373 for (read_group
= write_group
* rwdqs_ratio
,
3375 read_group
< (write_group
+ 1) * rwdqs_ratio
;
3377 read_test_bgn
+= rwcfg
->mem_dq_per_read_dqs
) {
3378 if (STATIC_CALIB_STEPS
& CALIB_SKIP_VFIFO
)
3381 /* Calibrate the VFIFO */
3382 if (rw_mgr_mem_calibrate_vfifo(read_group
,
3386 if (!(gbl
->phy_debug_mode_flags
&
3387 PHY_DEBUG_SWEEP_ALL_GROUPS
))
3390 /* The group failed, we're done. */
3394 /* Calibrate the output side */
3395 for (rank_bgn
= 0, sr
= 0;
3396 rank_bgn
< rwcfg
->mem_number_of_ranks
;
3397 rank_bgn
+= NUM_RANKS_PER_SHADOW_REG
, sr
++) {
3398 if (STATIC_CALIB_STEPS
& CALIB_SKIP_WRITES
)
3401 /* Not needed in quick mode! */
3402 if (STATIC_CALIB_STEPS
&
3403 CALIB_SKIP_DELAY_SWEEPS
)
3406 /* Calibrate WRITEs */
3407 if (!rw_mgr_mem_calibrate_writes(rank_bgn
,
3413 if (!(gbl
->phy_debug_mode_flags
&
3414 PHY_DEBUG_SWEEP_ALL_GROUPS
))
3418 /* Some group failed, we're done. */
3422 for (read_group
= write_group
* rwdqs_ratio
,
3424 read_group
< (write_group
+ 1) * rwdqs_ratio
;
3426 read_test_bgn
+= rwcfg
->mem_dq_per_read_dqs
) {
3427 if (STATIC_CALIB_STEPS
& CALIB_SKIP_WRITES
)
3430 if (!rw_mgr_mem_calibrate_vfifo_end(read_group
,
3434 if (!(gbl
->phy_debug_mode_flags
&
3435 PHY_DEBUG_SWEEP_ALL_GROUPS
))
3438 /* The group failed, we're done. */
3442 /* No group failed, continue as usual. */
3445 grp_failed
: /* A group failed, increment the counter. */
3450 * USER If there are any failing groups then report
3453 if (failing_groups
!= 0)
3456 if (STATIC_CALIB_STEPS
& CALIB_SKIP_LFIFO
)
3459 /* Calibrate the LFIFO */
3460 if (!rw_mgr_mem_calibrate_lfifo())
3465 * Do not remove this line as it makes sure all of our decisions
3466 * have been applied.
3468 writel(0, &sdr_scc_mgr
->update
);
3473 * run_mem_calibrate() - Perform memory calibration
3475 * This function triggers the entire memory calibration procedure.
3477 static int run_mem_calibrate(void)
3482 debug("%s:%d\n", __func__
, __LINE__
);
3484 /* Reset pass/fail status shown on afi_cal_success/fail */
3485 writel(PHY_MGR_CAL_RESET
, &phy_mgr_cfg
->cal_status
);
3487 /* Stop tracking manager. */
3488 ctrl_cfg
= readl(&sdr_ctrl
->ctrl_cfg
);
3489 writel(ctrl_cfg
& ~SDR_CTRLGRP_CTRLCFG_DQSTRKEN_MASK
,
3490 &sdr_ctrl
->ctrl_cfg
);
3492 phy_mgr_initialize();
3493 rw_mgr_mem_initialize();
3495 /* Perform the actual memory calibration. */
3496 pass
= mem_calibrate();
3498 mem_precharge_and_activate();
3499 writel(0, &phy_mgr_cmd
->fifo_reset
);
3502 rw_mgr_mem_handoff();
3504 * In Hard PHY this is a 2-bit control:
3506 * 1: DDIO Mux Select
3508 writel(0x2, &phy_mgr_cfg
->mux_sel
);
3510 /* Start tracking manager. */
3511 writel(ctrl_cfg
, &sdr_ctrl
->ctrl_cfg
);
3517 * debug_mem_calibrate() - Report result of memory calibration
3518 * @pass: Value indicating whether calibration passed or failed
3520 * This function reports the results of the memory calibration
3521 * and writes debug information into the register file.
3523 static void debug_mem_calibrate(int pass
)
3528 printf("%s: CALIBRATION PASSED\n", __FILE__
);
3533 if (gbl
->fom_in
> 0xff)
3536 if (gbl
->fom_out
> 0xff)
3537 gbl
->fom_out
= 0xff;
3539 /* Update the FOM in the register file */
3540 debug_info
= gbl
->fom_in
;
3541 debug_info
|= gbl
->fom_out
<< 8;
3542 writel(debug_info
, &sdr_reg_file
->fom
);
3544 writel(debug_info
, &phy_mgr_cfg
->cal_debug_info
);
3545 writel(PHY_MGR_CAL_SUCCESS
, &phy_mgr_cfg
->cal_status
);
3547 printf("%s: CALIBRATION FAILED\n", __FILE__
);
3549 debug_info
= gbl
->error_stage
;
3550 debug_info
|= gbl
->error_substage
<< 8;
3551 debug_info
|= gbl
->error_group
<< 16;
3553 writel(debug_info
, &sdr_reg_file
->failing_stage
);
3554 writel(debug_info
, &phy_mgr_cfg
->cal_debug_info
);
3555 writel(PHY_MGR_CAL_FAIL
, &phy_mgr_cfg
->cal_status
);
3557 /* Update the failing group/stage in the register file */
3558 debug_info
= gbl
->error_stage
;
3559 debug_info
|= gbl
->error_substage
<< 8;
3560 debug_info
|= gbl
->error_group
<< 16;
3561 writel(debug_info
, &sdr_reg_file
->failing_stage
);
3564 printf("%s: Calibration complete\n", __FILE__
);
3568 * hc_initialize_rom_data() - Initialize ROM data
3570 * Initialize ROM data.
3572 static void hc_initialize_rom_data(void)
3574 unsigned int nelem
= 0;
3575 const u32
*rom_init
;
3578 socfpga_get_seq_inst_init(&rom_init
, &nelem
);
3579 addr
= SDR_PHYGRP_RWMGRGRP_ADDRESS
| RW_MGR_INST_ROM_WRITE_OFFSET
;
3580 for (i
= 0; i
< nelem
; i
++)
3581 writel(rom_init
[i
], addr
+ (i
<< 2));
3583 socfpga_get_seq_ac_init(&rom_init
, &nelem
);
3584 addr
= SDR_PHYGRP_RWMGRGRP_ADDRESS
| RW_MGR_AC_ROM_WRITE_OFFSET
;
3585 for (i
= 0; i
< nelem
; i
++)
3586 writel(rom_init
[i
], addr
+ (i
<< 2));
3590 * initialize_reg_file() - Initialize SDR register file
3592 * Initialize SDR register file.
3594 static void initialize_reg_file(void)
3596 /* Initialize the register file with the correct data */
3597 writel(misccfg
->reg_file_init_seq_signature
, &sdr_reg_file
->signature
);
3598 writel(0, &sdr_reg_file
->debug_data_addr
);
3599 writel(0, &sdr_reg_file
->cur_stage
);
3600 writel(0, &sdr_reg_file
->fom
);
3601 writel(0, &sdr_reg_file
->failing_stage
);
3602 writel(0, &sdr_reg_file
->debug1
);
3603 writel(0, &sdr_reg_file
->debug2
);
3607 * initialize_hps_phy() - Initialize HPS PHY
3609 * Initialize HPS PHY.
3611 static void initialize_hps_phy(void)
3615 * Tracking also gets configured here because it's in the
3618 u32 trk_sample_count
= 7500;
3619 u32 trk_long_idle_sample_count
= (10 << 16) | 100;
3621 * Format is number of outer loops in the 16 MSB, sample
3626 reg
|= SDR_CTRLGRP_PHYCTRL_PHYCTRL_0_ACDELAYEN_SET(2);
3627 reg
|= SDR_CTRLGRP_PHYCTRL_PHYCTRL_0_DQDELAYEN_SET(1);
3628 reg
|= SDR_CTRLGRP_PHYCTRL_PHYCTRL_0_DQSDELAYEN_SET(1);
3629 reg
|= SDR_CTRLGRP_PHYCTRL_PHYCTRL_0_DQSLOGICDELAYEN_SET(1);
3630 reg
|= SDR_CTRLGRP_PHYCTRL_PHYCTRL_0_RESETDELAYEN_SET(0);
3631 reg
|= SDR_CTRLGRP_PHYCTRL_PHYCTRL_0_LPDDRDIS_SET(1);
3633 * This field selects the intrinsic latency to RDATA_EN/FULL path.
3634 * 00-bypass, 01- add 5 cycles, 10- add 10 cycles, 11- add 15 cycles.
3636 reg
|= SDR_CTRLGRP_PHYCTRL_PHYCTRL_0_ADDLATSEL_SET(0);
3637 reg
|= SDR_CTRLGRP_PHYCTRL_PHYCTRL_0_SAMPLECOUNT_19_0_SET(
3639 writel(reg
, &sdr_ctrl
->phy_ctrl0
);
3642 reg
|= SDR_CTRLGRP_PHYCTRL_PHYCTRL_1_SAMPLECOUNT_31_20_SET(
3644 SDR_CTRLGRP_PHYCTRL_PHYCTRL_0_SAMPLECOUNT_19_0_WIDTH
);
3645 reg
|= SDR_CTRLGRP_PHYCTRL_PHYCTRL_1_LONGIDLESAMPLECOUNT_19_0_SET(
3646 trk_long_idle_sample_count
);
3647 writel(reg
, &sdr_ctrl
->phy_ctrl1
);
3650 reg
|= SDR_CTRLGRP_PHYCTRL_PHYCTRL_2_LONGIDLESAMPLECOUNT_31_20_SET(
3651 trk_long_idle_sample_count
>>
3652 SDR_CTRLGRP_PHYCTRL_PHYCTRL_1_LONGIDLESAMPLECOUNT_19_0_WIDTH
);
3653 writel(reg
, &sdr_ctrl
->phy_ctrl2
);
3657 * initialize_tracking() - Initialize tracking
3659 * Initialize the register file with usable initial data.
3661 static void initialize_tracking(void)
3664 * Initialize the register file with the correct data.
3665 * Compute usable version of value in case we skip full
3666 * computation later.
3668 writel(DIV_ROUND_UP(iocfg
->delay_per_opa_tap
,
3669 iocfg
->delay_per_dchain_tap
) - 1,
3670 &sdr_reg_file
->dtaps_per_ptap
);
3672 /* trk_sample_count */
3673 writel(7500, &sdr_reg_file
->trk_sample_count
);
3675 /* longidle outer loop [15:0] */
3676 writel((10 << 16) | (100 << 0), &sdr_reg_file
->trk_longidle
);
3679 * longidle sample count [31:24]
3680 * trfc, worst case of 933Mhz 4Gb [23:16]
3681 * trcd, worst case [15:8]
3684 writel((243 << 24) | (14 << 16) | (10 << 8) | (4 << 0),
3685 &sdr_reg_file
->delays
);
3688 writel((rwcfg
->idle
<< 24) | (rwcfg
->activate_1
<< 16) |
3689 (rwcfg
->sgle_read
<< 8) | (rwcfg
->precharge_all
<< 0),
3690 &sdr_reg_file
->trk_rw_mgr_addr
);
3692 writel(rwcfg
->mem_if_read_dqs_width
,
3693 &sdr_reg_file
->trk_read_dqs_width
);
3696 writel((rwcfg
->refresh_all
<< 24) | (1000 << 0),
3697 &sdr_reg_file
->trk_rfsh
);
3700 int sdram_calibration_full(void)
3702 struct param_type my_param
;
3703 struct gbl_type my_gbl
;
3706 memset(&my_param
, 0, sizeof(my_param
));
3707 memset(&my_gbl
, 0, sizeof(my_gbl
));
3712 rwcfg
= socfpga_get_sdram_rwmgr_config();
3713 iocfg
= socfpga_get_sdram_io_config();
3714 misccfg
= socfpga_get_sdram_misc_config();
3716 /* Set the calibration enabled by default */
3717 gbl
->phy_debug_mode_flags
|= PHY_DEBUG_ENABLE_CAL_RPT
;
3719 * Only sweep all groups (regardless of fail state) by default
3720 * Set enabled read test by default.
3722 #if DISABLE_GUARANTEED_READ
3723 gbl
->phy_debug_mode_flags
|= PHY_DEBUG_DISABLE_GUARANTEED_READ
;
3725 /* Initialize the register file */
3726 initialize_reg_file();
3728 /* Initialize any PHY CSR */
3729 initialize_hps_phy();
3731 scc_mgr_initialize();
3733 initialize_tracking();
3735 printf("%s: Preparing to start memory calibration\n", __FILE__
);
3737 debug("%s:%d\n", __func__
, __LINE__
);
3738 debug_cond(DLEVEL
== 1,
3739 "DDR3 FULL_RATE ranks=%u cs/dimm=%u dq/dqs=%u,%u vg/dqs=%u,%u ",
3740 rwcfg
->mem_number_of_ranks
, rwcfg
->mem_number_of_cs_per_dimm
,
3741 rwcfg
->mem_dq_per_read_dqs
, rwcfg
->mem_dq_per_write_dqs
,
3742 rwcfg
->mem_virtual_groups_per_read_dqs
,
3743 rwcfg
->mem_virtual_groups_per_write_dqs
);
3744 debug_cond(DLEVEL
== 1,
3745 "dqs=%u,%u dq=%u dm=%u ptap_delay=%u dtap_delay=%u ",
3746 rwcfg
->mem_if_read_dqs_width
, rwcfg
->mem_if_write_dqs_width
,
3747 rwcfg
->mem_data_width
, rwcfg
->mem_data_mask_width
,
3748 iocfg
->delay_per_opa_tap
, iocfg
->delay_per_dchain_tap
);
3749 debug_cond(DLEVEL
== 1, "dtap_dqsen_delay=%u, dll=%u",
3750 iocfg
->delay_per_dqs_en_dchain_tap
, iocfg
->dll_chain_length
);
3751 debug_cond(DLEVEL
== 1,
3752 "max values: en_p=%u dqdqs_p=%u en_d=%u dqs_in_d=%u ",
3753 iocfg
->dqs_en_phase_max
, iocfg
->dqdqs_out_phase_max
,
3754 iocfg
->dqs_en_delay_max
, iocfg
->dqs_in_delay_max
);
3755 debug_cond(DLEVEL
== 1, "io_in_d=%u io_out1_d=%u io_out2_d=%u ",
3756 iocfg
->io_in_delay_max
, iocfg
->io_out1_delay_max
,
3757 iocfg
->io_out2_delay_max
);
3758 debug_cond(DLEVEL
== 1, "dqs_in_reserve=%u dqs_out_reserve=%u\n",
3759 iocfg
->dqs_in_reserve
, iocfg
->dqs_out_reserve
);
3761 hc_initialize_rom_data();
3763 /* update info for sims */
3764 reg_file_set_stage(CAL_STAGE_NIL
);
3765 reg_file_set_group(0);
3768 * Load global needed for those actions that require
3769 * some dynamic calibration support.
3771 dyn_calib_steps
= STATIC_CALIB_STEPS
;
3773 * Load global to allow dynamic selection of delay loop settings
3774 * based on calibration mode.
3776 if (!(dyn_calib_steps
& CALIB_SKIP_DELAY_LOOPS
))
3777 skip_delay_mask
= 0xff;
3779 skip_delay_mask
= 0x0;
3781 pass
= run_mem_calibrate();
3782 debug_mem_calibrate(pass
);