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u-boot/drivers/ddr/marvell/axp/ddr3_pbs.c
Simon Glass c05ed00afb common: Drop linux/delay.h from common header 
Move this uncommon header out of the common header.

Signed-off-by: Simon Glass <sjg@chromium.org>
2020-05-18 21:19:23 -04:00

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// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (C) Marvell International Ltd. and its affiliates
*/
#include <common.h>
#include <i2c.h>
#include <spl.h>
#include <asm/io.h>
#include <asm/arch/cpu.h>
#include <asm/arch/soc.h>
#include <linux/delay.h>
#include "ddr3_hw_training.h"
/*
* Debug
*/
#define DEBUG_PBS_FULL_C(s, d, l) \
DEBUG_PBS_FULL_S(s); DEBUG_PBS_FULL_D(d, l); DEBUG_PBS_FULL_S("\n")
#define DEBUG_PBS_C(s, d, l) \
DEBUG_PBS_S(s); DEBUG_PBS_D(d, l); DEBUG_PBS_S("\n")
#ifdef MV_DEBUG_PBS
#define DEBUG_PBS_S(s) puts(s)
#define DEBUG_PBS_D(d, l) printf("%x", d)
#else
#define DEBUG_PBS_S(s)
#define DEBUG_PBS_D(d, l)
#endif
#ifdef MV_DEBUG_FULL_PBS
#define DEBUG_PBS_FULL_S(s) puts(s)
#define DEBUG_PBS_FULL_D(d, l) printf("%x", d)
#else
#define DEBUG_PBS_FULL_S(s)
#define DEBUG_PBS_FULL_D(d, l)
#endif
#if defined(MV88F78X60) || defined(MV88F672X)
/* Temp array for skew data storage */
static u32 skew_array[(MAX_PUP_NUM) * DQ_NUM] = { 0 };
/* PBS locked dq (per pup) */
extern u32 pbs_locked_dq[MAX_PUP_NUM][DQ_NUM];
extern u32 pbs_locked_dm[MAX_PUP_NUM];
extern u32 pbs_locked_value[MAX_PUP_NUM][DQ_NUM];
#if defined(MV88F672X)
extern u32 pbs_pattern[2][LEN_16BIT_PBS_PATTERN];
extern u32 pbs_pattern_32b[2][LEN_PBS_PATTERN];
#else
extern u32 pbs_pattern_32b[2][LEN_PBS_PATTERN];
extern u32 pbs_pattern_64b[2][LEN_PBS_PATTERN];
#endif
extern u32 pbs_dq_mapping[PUP_NUM_64BIT + 1][DQ_NUM];
static int ddr3_tx_shift_dqs_adll_step_before_fail(MV_DRAM_INFO *dram_info,
u32 cur_pup, u32 pbs_pattern_idx, u32 ecc);
static int ddr3_rx_shift_dqs_to_first_fail(MV_DRAM_INFO *dram_info, u32 cur_pup,
u32 pbs_pattern_idx, u32 ecc);
static int ddr3_pbs_per_bit(MV_DRAM_INFO *dram_info, int *start_over, int is_tx,
u32 *pcur_pup, u32 pbs_pattern_idx, u32 ecc);
static int ddr3_set_pbs_results(MV_DRAM_INFO *dram_info, int is_tx);
static void ddr3_pbs_write_pup_dqs_reg(u32 cs, u32 pup, u32 dqs_delay);
/*
* Name: ddr3_pbs_tx
* Desc: Execute the PBS TX phase.
* Args: dram_info ddr3 training information struct
* Notes:
* Returns: MV_OK if success, other error code if fail.
*/
int ddr3_pbs_tx(MV_DRAM_INFO *dram_info)
{
/* Array of Deskew results */
/*
* Array to hold the total sum of skew from all iterations
* (for average purpose)
*/
u32 skew_sum_array[MAX_PUP_NUM][DQ_NUM] = { {0} };
/*
* Array to hold the total average skew from both patterns
* (for average purpose)
*/
u32 pattern_skew_array[MAX_PUP_NUM][DQ_NUM] = { {0} };
u32 pbs_rep_time = 0; /* counts number of loop in case of fail */
/* bit array for unlock pups - used to repeat on the RX operation */
u32 cur_pup;
u32 max_pup;
u32 pbs_retry;
u32 pup, dq, pups, cur_max_pup, valid_pup, reg;
u32 pattern_idx;
u32 ecc;
/* indicates whether we need to start the loop again */
int start_over;
DEBUG_PBS_S("DDR3 - PBS TX - Starting PBS TX procedure\n");
pups = dram_info->num_of_total_pups;
max_pup = dram_info->num_of_total_pups;
/* Enable SW override */
reg = reg_read(REG_DRAM_TRAINING_2_ADDR) |
(1 << REG_DRAM_TRAINING_2_SW_OVRD_OFFS);
/* [0] = 1 - Enable SW override */
/* 0x15B8 - Training SW 2 Register */
reg_write(REG_DRAM_TRAINING_2_ADDR, reg);
DEBUG_PBS_S("DDR3 - PBS RX - SW Override Enabled\n");
reg = 1 << REG_DRAM_TRAINING_AUTO_OFFS;
reg_write(REG_DRAM_TRAINING_ADDR, reg); /* 0x15B0 - Training Register */
/* Running twice for 2 different patterns. each patterns - 3 times */
for (pattern_idx = 0; pattern_idx < COUNT_PBS_PATTERN; pattern_idx++) {
DEBUG_PBS_C("DDR3 - PBS TX - Working with pattern - ",
pattern_idx, 1);
/* Reset sum array */
for (pup = 0; pup < pups; pup++) {
for (dq = 0; dq < DQ_NUM; dq++)
skew_sum_array[pup][dq] = 0;
}
/*
* Perform PBS several of times (3 for each pattern).
* At the end, we'll use the average
*/
/* If there is ECC, do each PBS again with mux change */
for (pbs_retry = 0; pbs_retry < COUNT_PBS_REPEAT; pbs_retry++) {
for (ecc = 0; ecc < (dram_info->ecc_ena + 1); ecc++) {
/*
* This parameter stores the current PUP
* num - ecc mode dependent - 4-8 / 1 pups
*/
cur_max_pup = (1 - ecc) *
dram_info->num_of_std_pups + ecc;
if (ecc) {
/* Only 1 pup in this case */
valid_pup = 0x1;
} else if (cur_max_pup > 4) {
/* 64 bit - 8 pups */
valid_pup = 0xFF;
} else if (cur_max_pup == 4) {
/* 32 bit - 4 pups */
valid_pup = 0xF;
} else {
/* 16 bit - 2 pups */
valid_pup = 0x3;
}
/* ECC Support - Switch ECC Mux on ecc=1 */
reg = reg_read(REG_DRAM_TRAINING_2_ADDR) &
~(1 << REG_DRAM_TRAINING_2_ECC_MUX_OFFS);
reg |= (dram_info->ecc_ena * ecc <<
REG_DRAM_TRAINING_2_ECC_MUX_OFFS);
reg_write(REG_DRAM_TRAINING_2_ADDR, reg);
if (ecc)
DEBUG_PBS_S("DDR3 - PBS Tx - ECC Mux Enabled\n");
else
DEBUG_PBS_S("DDR3 - PBS Tx - ECC Mux Disabled\n");
/* Init iteration values */
/* Clear the locked DQs */
for (pup = 0; pup < cur_max_pup; pup++) {
for (dq = 0; dq < DQ_NUM; dq++) {
pbs_locked_dq[
pup + ecc *
(max_pup - 1)][dq] =
0;
}
}
pbs_rep_time = 0;
cur_pup = valid_pup;
start_over = 0;
/*
* Run loop On current Pattern and current
* pattern iteration (just to cover the false
* fail problem)
*/
do {
DEBUG_PBS_S("DDR3 - PBS Tx - Pbs Rep Loop is ");
DEBUG_PBS_D(pbs_rep_time, 1);
DEBUG_PBS_S(", for Retry No.");
DEBUG_PBS_D(pbs_retry, 1);
DEBUG_PBS_S("\n");
/* Set all PBS values to MIN (0) */
DEBUG_PBS_S("DDR3 - PBS Tx - Set all PBS values to MIN\n");
for (dq = 0; dq < DQ_NUM; dq++) {
ddr3_write_pup_reg(
PUP_PBS_TX +
pbs_dq_mapping[pup *
(1 - ecc) +
ecc * ECC_PUP]
[dq], CS0, (1 - ecc) *
PUP_BC + ecc * ECC_PUP, 0,
0);
}
/*
* Shift DQ ADLL right, One step before
* fail
*/
DEBUG_PBS_S("DDR3 - PBS Tx - ADLL shift right one phase before fail\n");
if (MV_OK != ddr3_tx_shift_dqs_adll_step_before_fail
(dram_info, cur_pup, pattern_idx,
ecc))
return MV_DDR3_TRAINING_ERR_PBS_ADLL_SHR_1PHASE;
/* PBS For each bit */
DEBUG_PBS_S("DDR3 - PBS Tx - perform PBS for each bit\n");
/*
* In this stage - start_over = 0
*/
if (MV_OK != ddr3_pbs_per_bit(
dram_info, &start_over, 1,
&cur_pup, pattern_idx, ecc))
return MV_DDR3_TRAINING_ERR_PBS_TX_PER_BIT;
} while ((start_over == 1) &&
(++pbs_rep_time < COUNT_PBS_STARTOVER));
if (pbs_rep_time == COUNT_PBS_STARTOVER &&
start_over == 1) {
DEBUG_PBS_S("DDR3 - PBS Tx - FAIL - Adll reach max value\n");
return MV_DDR3_TRAINING_ERR_PBS_TX_MAX_VAL;
}
DEBUG_PBS_FULL_C("DDR3 - PBS TX - values for iteration - ",
pbs_retry, 1);
for (pup = 0; pup < cur_max_pup; pup++) {
/*
* To minimize delay elements, inc
* from pbs value the min pbs val
*/
DEBUG_PBS_S("DDR3 - PBS - PUP");
DEBUG_PBS_D((pup + (ecc * ECC_PUP)), 1);
DEBUG_PBS_S(": ");
for (dq = 0; dq < DQ_NUM; dq++) {
/* Set skew value for all dq */
/*
* Bit# Deskew <- Bit# Deskew -
* last / first failing bit
* Deskew For all bits (per PUP)
* (minimize delay elements)
*/
DEBUG_PBS_S("DQ");
DEBUG_PBS_D(dq, 1);
DEBUG_PBS_S("-");
DEBUG_PBS_D(skew_array
[((pup) * DQ_NUM) +
dq], 2);
DEBUG_PBS_S(", ");
}
DEBUG_PBS_S("\n");
}
/*
* Collect the results we got on this trial
* of PBS
*/
for (pup = 0; pup < cur_max_pup; pup++) {
for (dq = 0; dq < DQ_NUM; dq++) {
skew_sum_array[pup + (ecc * (max_pup - 1))]
[dq] += skew_array
[((pup) * DQ_NUM) + dq];
}
}
/* ECC Support - Disable ECC MUX */
reg = reg_read(REG_DRAM_TRAINING_2_ADDR) &
~(1 << REG_DRAM_TRAINING_2_ECC_MUX_OFFS);
reg_write(REG_DRAM_TRAINING_2_ADDR, reg);
}
}
DEBUG_PBS_C("DDR3 - PBS TX - values for current pattern - ",
pattern_idx, 1);
for (pup = 0; pup < max_pup; pup++) {
/*
* To minimize delay elements, inc from pbs value the
* min pbs val
*/
DEBUG_PBS_S("DDR3 - PBS - PUP");
DEBUG_PBS_D(pup, 1);
DEBUG_PBS_S(": ");
for (dq = 0; dq < DQ_NUM; dq++) {
/* set skew value for all dq */
/* Bit# Deskew <- Bit# Deskew - last / first failing bit Deskew For all bits (per PUP) (minimize delay elements) */
DEBUG_PBS_S("DQ");
DEBUG_PBS_D(dq, 1);
DEBUG_PBS_S("-");
DEBUG_PBS_D(skew_sum_array[pup][dq] /
COUNT_PBS_REPEAT, 2);
DEBUG_PBS_S(", ");
}
DEBUG_PBS_S("\n");
}
/*
* Calculate the average skew for current pattern for each
* pup and each bit
*/
DEBUG_PBS_C("DDR3 - PBS TX - Average for pattern - ",
pattern_idx, 1);
for (pup = 0; pup < max_pup; pup++) {
/*
* FOR ECC only :: found min and max value for current
* pattern skew array
*/
/* Loop for all dqs */
for (dq = 0; dq < DQ_NUM; dq++) {
pattern_skew_array[pup][dq] +=
(skew_sum_array[pup][dq] /
COUNT_PBS_REPEAT);
}
}
}
/* Calculate the average skew */
for (pup = 0; pup < max_pup; pup++) {
for (dq = 0; dq < DQ_NUM; dq++)
skew_array[((pup) * DQ_NUM) + dq] =
pattern_skew_array[pup][dq] / COUNT_PBS_PATTERN;
}
DEBUG_PBS_S("DDR3 - PBS TX - Average for all patterns:\n");
for (pup = 0; pup < max_pup; pup++) {
/*
* To minimize delay elements, inc from pbs value the min
* pbs val
*/
DEBUG_PBS_S("DDR3 - PBS - PUP");
DEBUG_PBS_D(pup, 1);
DEBUG_PBS_S(": ");
for (dq = 0; dq < DQ_NUM; dq++) {
/* Set skew value for all dq */
/*
* Bit# Deskew <- Bit# Deskew - last / first
* failing bit Deskew For all bits (per PUP)
* (minimize delay elements)
*/
DEBUG_PBS_S("DQ");
DEBUG_PBS_D(dq, 1);
DEBUG_PBS_S("-");
DEBUG_PBS_D(skew_array[(pup * DQ_NUM) + dq], 2);
DEBUG_PBS_S(", ");
}
DEBUG_PBS_S("\n");
}
/* Return ADLL to default value */
for (pup = 0; pup < max_pup; pup++) {
if (pup == (max_pup - 1) && dram_info->ecc_ena)
pup = ECC_PUP;
ddr3_pbs_write_pup_dqs_reg(CS0, pup, INIT_WL_DELAY);
}
/* Set averaged PBS results */
ddr3_set_pbs_results(dram_info, 1);
/* Disable SW override - Must be in a different stage */
/* [0]=0 - Enable SW override */
reg = reg_read(REG_DRAM_TRAINING_2_ADDR);
reg &= ~(1 << REG_DRAM_TRAINING_2_SW_OVRD_OFFS);
/* 0x15B8 - Training SW 2 Register */
reg_write(REG_DRAM_TRAINING_2_ADDR, reg);
reg = reg_read(REG_DRAM_TRAINING_1_ADDR) |
(1 << REG_DRAM_TRAINING_1_TRNBPOINT_OFFS);
reg_write(REG_DRAM_TRAINING_1_ADDR, reg);
DEBUG_PBS_S("DDR3 - PBS Tx - PBS TX ended successfuly\n");
return MV_OK;
}
/*
* Name: ddr3_tx_shift_dqs_adll_step_before_fail
* Desc: Execute the Tx shift DQ phase.
* Args: dram_info ddr3 training information struct
* cur_pup bit array of the function active pups.
* pbs_pattern_idx Index of PBS pattern
* Notes:
* Returns: MV_OK if success, other error code if fail.
*/
static int ddr3_tx_shift_dqs_adll_step_before_fail(MV_DRAM_INFO *dram_info,
u32 cur_pup,
u32 pbs_pattern_idx, u32 ecc)
{
u32 unlock_pup; /* bit array of unlock pups */
u32 new_lockup_pup; /* bit array of compare failed pups */
u32 adll_val = 4; /* INIT_WL_DELAY */
u32 cur_max_pup, pup;
u32 dqs_dly_set[MAX_PUP_NUM] = { 0 };
u32 *pattern_ptr;
/* Choose pattern */
switch (dram_info->ddr_width) {
#if defined(MV88F672X)
case 16:
pattern_ptr = (u32 *)&pbs_pattern[pbs_pattern_idx];
break;
#endif
case 32:
pattern_ptr = (u32 *)&pbs_pattern_32b[pbs_pattern_idx];
break;
#if defined(MV88F78X60)
case 64:
pattern_ptr = (u32 *)&pbs_pattern_64b[pbs_pattern_idx];
break;
#endif
default:
return MV_FAIL;
}
/* Set current pup number */
if (cur_pup == 0x1) /* Ecc mode */
cur_max_pup = 1;
else
cur_max_pup = dram_info->num_of_std_pups;
unlock_pup = cur_pup; /* '1' for each unlocked pup */
/* Loop on all ADLL Vaules */
do {
/* Loop until found first fail */
adll_val++;
/*
* Increment (Move to right - ADLL) DQ TX delay
* (broadcast to all Data PUPs)
*/
for (pup = 0; pup < cur_max_pup; pup++)
ddr3_pbs_write_pup_dqs_reg(CS0,
pup * (1 - ecc) +
ECC_PUP * ecc, adll_val);
/*
* Write and Read, compare results (read was already verified)
*/
/* 0 - all locked */
new_lockup_pup = 0;
if (MV_OK != ddr3_sdram_compare(dram_info, unlock_pup,
&new_lockup_pup,
pattern_ptr, LEN_PBS_PATTERN,
SDRAM_PBS_TX_OFFS, 1, 0,
NULL,
0))
return MV_FAIL;
unlock_pup &= ~new_lockup_pup;
DEBUG_PBS_FULL_S("Shift DQS by 2 steps for PUPs: ");
DEBUG_PBS_FULL_D(unlock_pup, 2);
DEBUG_PBS_FULL_C(", Set ADLL value = ", adll_val, 2);
/* If any PUP failed there is '1' to mark the PUP */
if (new_lockup_pup != 0) {
/*
* Decrement (Move Back to Left two steps - ADLL)
* DQ TX delay for current failed pups and save
*/
for (pup = 0; pup < cur_max_pup; pup++) {
if (((new_lockup_pup >> pup) & 0x1) &&
dqs_dly_set[pup] == 0)
dqs_dly_set[pup] = adll_val - 1;
}
}
} while ((unlock_pup != 0) && (adll_val != ADLL_MAX));
if (unlock_pup != 0) {
DEBUG_PBS_FULL_S("DDR3 - PBS Tx - Shift DQ - Adll value reached maximum\n");
for (pup = 0; pup < cur_max_pup; pup++) {
if (((unlock_pup >> pup) & 0x1) &&
dqs_dly_set[pup] == 0)
dqs_dly_set[pup] = adll_val - 1;
}
}
DEBUG_PBS_FULL_C("PBS TX one step before fail last pups locked Adll ",
adll_val - 2, 2);
/* Set the PUP DQS DLY Values */
for (pup = 0; pup < cur_max_pup; pup++)
ddr3_pbs_write_pup_dqs_reg(CS0, pup * (1 - ecc) + ECC_PUP * ecc,
dqs_dly_set[pup]);
/* Found one phase before fail */
return MV_OK;
}
/*
* Name: ddr3_pbs_rx
* Desc: Execute the PBS RX phase.
* Args: dram_info ddr3 training information struct
* Notes:
* Returns: MV_OK if success, other error code if fail.
*/
int ddr3_pbs_rx(MV_DRAM_INFO *dram_info)
{
/*
* Array to hold the total sum of skew from all iterations
* (for average purpose)
*/
u32 skew_sum_array[MAX_PUP_NUM][DQ_NUM] = { {0} };
/*
* Array to hold the total average skew from both patterns
* (for average purpose)
*/
u32 pattern_skew_array[MAX_PUP_NUM][DQ_NUM] = { {0} };
u32 pbs_rep_time = 0; /* counts number of loop in case of fail */
/* bit array for unlock pups - used to repeat on the RX operation */
u32 cur_pup;
u32 max_pup;
u32 pbs_retry;
u32 pup, dq, pups, cur_max_pup, valid_pup, reg;
u32 pattern_idx;
u32 ecc;
/* indicates whether we need to start the loop again */
int start_over;
int status;
DEBUG_PBS_S("DDR3 - PBS RX - Starting PBS RX procedure\n");
pups = dram_info->num_of_total_pups;
max_pup = dram_info->num_of_total_pups;
/* Enable SW override */
reg = reg_read(REG_DRAM_TRAINING_2_ADDR) |
(1 << REG_DRAM_TRAINING_2_SW_OVRD_OFFS);
/* [0] = 1 - Enable SW override */
/* 0x15B8 - Training SW 2 Register */
reg_write(REG_DRAM_TRAINING_2_ADDR, reg);
DEBUG_PBS_FULL_S("DDR3 - PBS RX - SW Override Enabled\n");
reg = 1 << REG_DRAM_TRAINING_AUTO_OFFS;
reg_write(REG_DRAM_TRAINING_ADDR, reg); /* 0x15B0 - Training Register */
/* Running twice for 2 different patterns. each patterns - 3 times */
for (pattern_idx = 0; pattern_idx < COUNT_PBS_PATTERN; pattern_idx++) {
DEBUG_PBS_FULL_C("DDR3 - PBS RX - Working with pattern - ",
pattern_idx, 1);
/* Reset sum array */
for (pup = 0; pup < pups; pup++) {
for (dq = 0; dq < DQ_NUM; dq++)
skew_sum_array[pup][dq] = 0;
}
/*
* Perform PBS several of times (3 for each pattern).
* At the end, we'll use the average
*/
/* If there is ECC, do each PBS again with mux change */
for (pbs_retry = 0; pbs_retry < COUNT_PBS_REPEAT; pbs_retry++) {
for (ecc = 0; ecc < (dram_info->ecc_ena + 1); ecc++) {
/*
* This parameter stores the current PUP
* num - ecc mode dependent - 4-8 / 1 pups
*/
cur_max_pup = (1 - ecc) *
dram_info->num_of_std_pups + ecc;
if (ecc) {
/* Only 1 pup in this case */
valid_pup = 0x1;
} else if (cur_max_pup > 4) {
/* 64 bit - 8 pups */
valid_pup = 0xFF;
} else if (cur_max_pup == 4) {
/* 32 bit - 4 pups */
valid_pup = 0xF;
} else {
/* 16 bit - 2 pups */
valid_pup = 0x3;
}
/* ECC Support - Switch ECC Mux on ecc=1 */
reg = reg_read(REG_DRAM_TRAINING_2_ADDR) &
~(1 << REG_DRAM_TRAINING_2_ECC_MUX_OFFS);
reg |= (dram_info->ecc_ena * ecc <<
REG_DRAM_TRAINING_2_ECC_MUX_OFFS);
reg_write(REG_DRAM_TRAINING_2_ADDR, reg);
if (ecc)
DEBUG_PBS_FULL_S("DDR3 - PBS Rx - ECC Mux Enabled\n");
else
DEBUG_PBS_FULL_S("DDR3 - PBS Rx - ECC Mux Disabled\n");
/* Init iteration values */
/* Clear the locked DQs */
for (pup = 0; pup < cur_max_pup; pup++) {
for (dq = 0; dq < DQ_NUM; dq++) {
pbs_locked_dq[
pup + ecc * (max_pup - 1)][dq] =
0;
}
}
pbs_rep_time = 0;
cur_pup = valid_pup;
start_over = 0;
/*
* Run loop On current Pattern and current
* pattern iteration (just to cover the false
* fail problem
*/
do {
DEBUG_PBS_FULL_S("DDR3 - PBS Rx - Pbs Rep Loop is ");
DEBUG_PBS_FULL_D(pbs_rep_time, 1);
DEBUG_PBS_FULL_S(", for Retry No.");
DEBUG_PBS_FULL_D(pbs_retry, 1);
DEBUG_PBS_FULL_S("\n");
/* Set all PBS values to MAX (31) */
for (pup = 0; pup < cur_max_pup; pup++) {
for (dq = 0; dq < DQ_NUM; dq++)
ddr3_write_pup_reg(
PUP_PBS_RX +
pbs_dq_mapping[
pup * (1 - ecc)
+ ecc * ECC_PUP]
[dq], CS0,
pup + ecc * ECC_PUP,
0, MAX_PBS);
}
/* Set all DQS PBS values to MIN (0) */
for (pup = 0; pup < cur_max_pup; pup++) {
ddr3_write_pup_reg(PUP_PBS_RX +
DQ_NUM, CS0,
pup +
ecc *
ECC_PUP, 0,
0);
}
/* Shift DQS, To first Fail */
DEBUG_PBS_FULL_S("DDR3 - PBS Rx - Shift RX DQS to first fail\n");
status = ddr3_rx_shift_dqs_to_first_fail
(dram_info, cur_pup,
pattern_idx, ecc);
if (MV_OK != status) {
DEBUG_PBS_S("DDR3 - PBS Rx - ddr3_rx_shift_dqs_to_first_fail failed.\n");
DEBUG_PBS_D(status, 8);
DEBUG_PBS_S("\nDDR3 - PBS Rx - SKIP.\n");
/* Reset read FIFO */
reg = reg_read(REG_DRAM_TRAINING_ADDR);
/* Start Auto Read Leveling procedure */
reg |= (1 << REG_DRAM_TRAINING_RL_OFFS);
/* 0x15B0 - Training Register */
reg_write(REG_DRAM_TRAINING_ADDR, reg);
reg = reg_read(REG_DRAM_TRAINING_2_ADDR);
reg |= ((1 << REG_DRAM_TRAINING_2_FIFO_RST_OFFS)
+ (1 << REG_DRAM_TRAINING_2_SW_OVRD_OFFS));
/* [0] = 1 - Enable SW override, [4] = 1 - FIFO reset */
/* 0x15B8 - Training SW 2 Register */
reg_write(REG_DRAM_TRAINING_2_ADDR, reg);
do {
reg = (reg_read(REG_DRAM_TRAINING_2_ADDR))
& (1 << REG_DRAM_TRAINING_2_FIFO_RST_OFFS);
} while (reg); /* Wait for '0' */
reg = reg_read(REG_DRAM_TRAINING_ADDR);
/* Clear Auto Read Leveling procedure */
reg &= ~(1 << REG_DRAM_TRAINING_RL_OFFS);
/* 0x15B0 - Training Register */
reg_write(REG_DRAM_TRAINING_ADDR, reg);
/* Set ADLL to 15 */
for (pup = 0; pup < max_pup;
pup++) {
ddr3_write_pup_reg
(PUP_DQS_RD, CS0,
pup +
(ecc * ECC_PUP), 0,
15);
}
/* Set all PBS values to MIN (0) */
for (pup = 0; pup < cur_max_pup;
pup++) {
for (dq = 0;
dq < DQ_NUM; dq++)
ddr3_write_pup_reg
(PUP_PBS_RX +
pbs_dq_mapping
[pup * (1 - ecc) +
ecc * ECC_PUP]
[dq], CS0,
pup + ecc * ECC_PUP,
0, MIN_PBS);
}
return MV_OK;
}
/* PBS For each bit */
DEBUG_PBS_FULL_S("DDR3 - PBS Rx - perform PBS for each bit\n");
/* in this stage - start_over = 0; */
if (MV_OK != ddr3_pbs_per_bit(
dram_info, &start_over,
0, &cur_pup,
pattern_idx, ecc)) {
DEBUG_PBS_S("DDR3 - PBS Rx - ddr3_pbs_per_bit failed.");
return MV_DDR3_TRAINING_ERR_PBS_RX_PER_BIT;
}
} while ((start_over == 1) &&
(++pbs_rep_time < COUNT_PBS_STARTOVER));
if (pbs_rep_time == COUNT_PBS_STARTOVER &&
start_over == 1) {
DEBUG_PBS_FULL_S("DDR3 - PBS Rx - FAIL - Algorithm failed doing RX PBS\n");
return MV_DDR3_TRAINING_ERR_PBS_RX_MAX_VAL;
}
/* Return DQS ADLL to default value - 15 */
/* Set all DQS PBS values to MIN (0) */
for (pup = 0; pup < cur_max_pup; pup++)
ddr3_write_pup_reg(PUP_DQS_RD, CS0,
pup + ecc * ECC_PUP,
0, INIT_RL_DELAY);
DEBUG_PBS_FULL_C("DDR3 - PBS RX - values for iteration - ",
pbs_retry, 1);
for (pup = 0; pup < cur_max_pup; pup++) {
/*
* To minimize delay elements, inc from
* pbs value the min pbs val
*/
DEBUG_PBS_FULL_S("DDR3 - PBS - PUP");
DEBUG_PBS_FULL_D((pup +
(ecc * ECC_PUP)), 1);
DEBUG_PBS_FULL_S(": ");
for (dq = 0; dq < DQ_NUM; dq++) {
/* Set skew value for all dq */
/*
* Bit# Deskew <- Bit# Deskew -
* last / first failing bit
* Deskew For all bits (per PUP)
* (minimize delay elements)
*/
DEBUG_PBS_FULL_S("DQ");
DEBUG_PBS_FULL_D(dq, 1);
DEBUG_PBS_FULL_S("-");
DEBUG_PBS_FULL_D(skew_array
[((pup) *
DQ_NUM) +
dq], 2);
DEBUG_PBS_FULL_S(", ");
}
DEBUG_PBS_FULL_S("\n");
}
/*
* Collect the results we got on this trial
* of PBS
*/
for (pup = 0; pup < cur_max_pup; pup++) {
for (dq = 0; dq < DQ_NUM; dq++) {
skew_sum_array
[pup + (ecc * (max_pup - 1))]
[dq] +=
skew_array[((pup) * DQ_NUM) + dq];
}
}
/* ECC Support - Disable ECC MUX */
reg = reg_read(REG_DRAM_TRAINING_2_ADDR) &
~(1 << REG_DRAM_TRAINING_2_ECC_MUX_OFFS);
reg_write(REG_DRAM_TRAINING_2_ADDR, reg);
}
}
/*
* Calculate the average skew for current pattern for each
* pup and each bit
*/
DEBUG_PBS_FULL_C("DDR3 - PBS RX - Average for pattern - ",
pattern_idx, 1);
for (pup = 0; pup < max_pup; pup++) {
/*
* FOR ECC only :: found min and max value for
* current pattern skew array
*/
/* Loop for all dqs */
for (dq = 0; dq < DQ_NUM; dq++) {
pattern_skew_array[pup][dq] +=
(skew_sum_array[pup][dq] /
COUNT_PBS_REPEAT);
}
}
DEBUG_PBS_C("DDR3 - PBS RX - values for current pattern - ",
pattern_idx, 1);
for (pup = 0; pup < max_pup; pup++) {
/*
* To minimize delay elements, inc from pbs value the
* min pbs val
*/
DEBUG_PBS_S("DDR3 - PBS RX - PUP");
DEBUG_PBS_D(pup, 1);
DEBUG_PBS_S(": ");
for (dq = 0; dq < DQ_NUM; dq++) {
/* Set skew value for all dq */
/*
* Bit# Deskew <- Bit# Deskew - last / first
* failing bit Deskew For all bits (per PUP)
* (minimize delay elements)
*/
DEBUG_PBS_S("DQ");
DEBUG_PBS_D(dq, 1);
DEBUG_PBS_S("-");
DEBUG_PBS_D(skew_sum_array[pup][dq] /
COUNT_PBS_REPEAT, 2);
DEBUG_PBS_S(", ");
}
DEBUG_PBS_S("\n");
}
}
/* Calculate the average skew */
for (pup = 0; pup < max_pup; pup++) {
for (dq = 0; dq < DQ_NUM; dq++)
skew_array[((pup) * DQ_NUM) + dq] =
pattern_skew_array[pup][dq] / COUNT_PBS_PATTERN;
}
DEBUG_PBS_S("DDR3 - PBS RX - Average for all patterns:\n");
for (pup = 0; pup < max_pup; pup++) {
/*
* To minimize delay elements, inc from pbs value the
* min pbs val
*/
DEBUG_PBS_S("DDR3 - PBS - PUP");
DEBUG_PBS_D(pup, 1);
DEBUG_PBS_S(": ");
for (dq = 0; dq < DQ_NUM; dq++) {
/* Set skew value for all dq */
/*
* Bit# Deskew <- Bit# Deskew - last / first
* failing bit Deskew For all bits (per PUP)
* (minimize delay elements)
*/
DEBUG_PBS_S("DQ");
DEBUG_PBS_D(dq, 1);
DEBUG_PBS_S("-");
DEBUG_PBS_D(skew_array[(pup * DQ_NUM) + dq], 2);
DEBUG_PBS_S(", ");
}
DEBUG_PBS_S("\n");
}
/* Return ADLL to default value */
ddr3_write_pup_reg(PUP_DQS_RD, CS0, PUP_BC, 0, INIT_RL_DELAY);
/* Set averaged PBS results */
ddr3_set_pbs_results(dram_info, 0);
/* Disable SW override - Must be in a different stage */
/* [0]=0 - Enable SW override */
reg = reg_read(REG_DRAM_TRAINING_2_ADDR);
reg &= ~(1 << REG_DRAM_TRAINING_2_SW_OVRD_OFFS);
/* 0x15B8 - Training SW 2 Register */
reg_write(REG_DRAM_TRAINING_2_ADDR, reg);
reg = reg_read(REG_DRAM_TRAINING_1_ADDR) |
(1 << REG_DRAM_TRAINING_1_TRNBPOINT_OFFS);
reg_write(REG_DRAM_TRAINING_1_ADDR, reg);
DEBUG_PBS_FULL_S("DDR3 - PBS RX - ended successfuly\n");
return MV_OK;
}
/*
* Name: ddr3_rx_shift_dqs_to_first_fail
* Desc: Execute the Rx shift DQ phase.
* Args: dram_info ddr3 training information struct
* cur_pup bit array of the function active pups.
* pbs_pattern_idx Index of PBS pattern
* Notes:
* Returns: MV_OK if success, other error code if fail.
*/
static int ddr3_rx_shift_dqs_to_first_fail(MV_DRAM_INFO *dram_info, u32 cur_pup,
u32 pbs_pattern_idx, u32 ecc)
{
u32 unlock_pup; /* bit array of unlock pups */
u32 new_lockup_pup; /* bit array of compare failed pups */
u32 adll_val = MAX_DELAY;
u32 dqs_deskew_val = 0; /* current value of DQS PBS deskew */
u32 cur_max_pup, pup, pass_pup;
u32 *pattern_ptr;
/* Choose pattern */
switch (dram_info->ddr_width) {
#if defined(MV88F672X)
case 16:
pattern_ptr = (u32 *)&pbs_pattern[pbs_pattern_idx];
break;
#endif
case 32:
pattern_ptr = (u32 *)&pbs_pattern_32b[pbs_pattern_idx];
break;
#if defined(MV88F78X60)
case 64:
pattern_ptr = (u32 *)&pbs_pattern_64b[pbs_pattern_idx];
break;
#endif
default:
return MV_FAIL;
}
/* Set current pup number */
if (cur_pup == 0x1) /* Ecc mode */
cur_max_pup = 1;
else
cur_max_pup = dram_info->num_of_std_pups;
unlock_pup = cur_pup; /* '1' for each unlocked pup */
DEBUG_PBS_FULL_S("DDR3 - PBS RX - Shift DQS - Starting...\n");
/* Set DQS ADLL to MAX */
DEBUG_PBS_FULL_S("DDR3 - PBS RX - Shift DQS - Set DQS ADLL to Max for all PUPs\n");
for (pup = 0; pup < cur_max_pup; pup++)
ddr3_write_pup_reg(PUP_DQS_RD, CS0, pup + ecc * ECC_PUP, 0,
MAX_DELAY);
/* Loop on all ADLL Vaules */
do {
/* Loop until found fail for all pups */
new_lockup_pup = 0;
if (MV_OK != ddr3_sdram_compare(dram_info, unlock_pup,
&new_lockup_pup,
pattern_ptr, LEN_PBS_PATTERN,
SDRAM_PBS_I_OFFS +
pbs_pattern_idx * SDRAM_PBS_NEXT_OFFS,
0, 0, NULL, 0)) {
DEBUG_PBS_S("DDR3 - PBS Rx - Shift DQS - MV_DDR3_TRAINING_ERR_PBS_SHIFT_QDS_SRAM_CMP(ddr3_sdram_compare)\n");
return MV_DDR3_TRAINING_ERR_PBS_SHIFT_QDS_SRAM_CMP;
}
if ((new_lockup_pup != 0) && (dqs_deskew_val <= 1)) {
/* Fail on start with first deskew value */
/* Decrement DQS ADLL */
--adll_val;
if (adll_val == ADLL_MIN) {
DEBUG_PBS_S("DDR3 - PBS Rx - Shift DQS - fail on start with first deskew value\n");
return MV_DDR3_TRAINING_ERR_PBS_SHIFT_QDS_SRAM_CMP;
}
ddr3_write_pup_reg(PUP_DQS_RD, CS0, pup + ecc * ECC_PUP,
0, adll_val);
continue;
}
/* Update all new locked pups */
unlock_pup &= ~new_lockup_pup;
if ((unlock_pup == 0) || (dqs_deskew_val == MAX_PBS)) {
if (dqs_deskew_val == MAX_PBS) {
/*
* Reach max value of dqs deskew or get fail
* for all pups
*/
DEBUG_PBS_FULL_S("DDR3 - PBS RX - Shift DQS - DQS deskew reached maximum value\n");
}
break;
}
DEBUG_PBS_FULL_S("DDR3 - PBS RX - Shift DQS - Inc DQS deskew for PUPs: ");
DEBUG_PBS_FULL_D(unlock_pup, 2);
DEBUG_PBS_FULL_C(", deskew = ", dqs_deskew_val, 2);
/* Increment DQS deskew elements - Only for unlocked pups */
dqs_deskew_val++;
for (pup = 0; pup < cur_max_pup; pup++) {
if (IS_PUP_ACTIVE(unlock_pup, pup) == 1) {
ddr3_write_pup_reg(PUP_PBS_RX + DQS_DQ_NUM, CS0,
pup + ecc * ECC_PUP, 0,
dqs_deskew_val);
}
}
} while (1);
DEBUG_PBS_FULL_S("DDR3 - PBS RX - Shift DQS - ADLL shift one step before fail\n");
/* Continue to ADLL shift one step before fail */
unlock_pup = cur_pup;
do {
/* Loop until pass compare for all pups */
new_lockup_pup = 0;
/* Read and compare results */
if (MV_OK != ddr3_sdram_compare(dram_info, unlock_pup, &new_lockup_pup,
pattern_ptr, LEN_PBS_PATTERN,
SDRAM_PBS_I_OFFS +
pbs_pattern_idx * SDRAM_PBS_NEXT_OFFS,
1, 0, NULL, 0)) {
DEBUG_PBS_S("DDR3 - PBS Rx - Shift DQS - MV_DDR3_TRAINING_ERR_PBS_SHIFT_QDS_SRAM_CMP(ddr3_sdram_compare)\n");
return MV_DDR3_TRAINING_ERR_PBS_SHIFT_QDS_SRAM_CMP;
}
/*
* Get mask for pup which passed so their adll will be
* changed to 2 steps before fails
*/
pass_pup = unlock_pup & ~new_lockup_pup;
DEBUG_PBS_FULL_S("Shift DQS by 2 steps for PUPs: ");
DEBUG_PBS_FULL_D(pass_pup, 2);
DEBUG_PBS_FULL_C(", Set ADLL value = ", (adll_val - 2), 2);
/* Only for pass pups */
for (pup = 0; pup < cur_max_pup; pup++) {
if (IS_PUP_ACTIVE(pass_pup, pup) == 1) {
ddr3_write_pup_reg(PUP_DQS_RD, CS0,
pup + ecc * ECC_PUP, 0,
(adll_val - 2));
}
}
/* Locked pups that compare success */
unlock_pup &= new_lockup_pup;
if (unlock_pup == 0) {
/* All pups locked */
break;
}
/* Found error */
if (adll_val == 0) {
DEBUG_PBS_FULL_S("DDR3 - PBS Rx - Shift DQS - Adll reach min value\n");
return MV_DDR3_TRAINING_ERR_PBS_SHIFT_QDS_MAX_VAL;
}
/*
* Decrement (Move Back to Left one phase - ADLL) dqs RX delay
*/
adll_val--;
for (pup = 0; pup < cur_max_pup; pup++) {
if (IS_PUP_ACTIVE(unlock_pup, pup) == 1) {
ddr3_write_pup_reg(PUP_DQS_RD, CS0,
pup + ecc * ECC_PUP, 0,
adll_val);
}
}
} while (1);
return MV_OK;
}
/*
* lock_pups() extracted from ddr3_pbs_per_bit(). This just got too
* much indented making it hard to read / edit.
*/
static void lock_pups(u32 pup, u32 *pup_locked, u8 *unlock_pup_dq_array,
u32 pbs_curr_val, u32 start_pbs, u32 ecc, int is_tx)
{
u32 dq;
int idx;
/* Lock PBS value for all remaining PUPs bits */
DEBUG_PBS_FULL_S("DDR3 - PBS Per bit - Lock PBS value for all remaining PUPs bits, pup ");
DEBUG_PBS_FULL_D(pup, 1);
DEBUG_PBS_FULL_C(" pbs value ", pbs_curr_val, 2);
idx = pup * (1 - ecc) + ecc * ECC_PUP;
*pup_locked &= ~(1 << pup);
for (dq = 0; dq < DQ_NUM; dq++) {
if (IS_PUP_ACTIVE(unlock_pup_dq_array[dq], pup) == 1) {
int offs;
/* Lock current dq */
unlock_pup_dq_array[dq] &= ~(1 << pup);
skew_array[(pup * DQ_NUM) + dq] = pbs_curr_val;
if (is_tx == 1)
offs = PUP_PBS_TX;
else
offs = PUP_PBS_RX;
ddr3_write_pup_reg(offs +
pbs_dq_mapping[idx][dq], CS0,
idx, 0, start_pbs);
}
}
}
/*
* Name: ddr3_pbs_per_bit
* Desc: Execute the Per Bit Skew phase.
* Args: start_over Return whether need to start over the algorithm
* is_tx Indicate whether Rx or Tx
* pcur_pup bit array of the function active pups. return the
* pups that need to repeat on the PBS
* pbs_pattern_idx Index of PBS pattern
*
* Notes: Current implementation supports double activation of this function.
* i.e. in order to activate this function (using start_over) more than
* twice, the implementation should change.
* imlementation limitation are marked using
* ' CHIP-ONLY! - Implementation Limitation '
* Returns: MV_OK if success, other error code if fail.
*/
static int ddr3_pbs_per_bit(MV_DRAM_INFO *dram_info, int *start_over, int is_tx,
u32 *pcur_pup, u32 pbs_pattern_idx, u32 ecc)
{
/*
* Bit array to indicate if we already get fail on bit per pup & dq bit
*/
u8 unlock_pup_dq_array[DQ_NUM] = {
*pcur_pup, *pcur_pup, *pcur_pup, *pcur_pup, *pcur_pup,
*pcur_pup, *pcur_pup, *pcur_pup
};
u8 cmp_unlock_pup_dq_array[COUNT_PBS_COMP_RETRY_NUM][DQ_NUM];
u32 pup, dq;
/* value of pbs is according to RX or TX */
u32 start_pbs, last_pbs;
u32 pbs_curr_val;
/* bit array that indicates all dq of the pup locked */
u32 pup_locked;
u32 first_fail[MAX_PUP_NUM] = { 0 }; /* count first fail per pup */
/* indicates whether we get first fail per pup */
int first_failed[MAX_PUP_NUM] = { 0 };
/* bit array that indicates pup already get fail */
u32 sum_pup_fail;
/* use to calculate diff between curr pbs to first fail pbs */
u32 calc_pbs_diff;
u32 pbs_cmp_retry;
u32 max_pup;
/* Set init values for retry array - 8 retry */
for (pbs_cmp_retry = 0; pbs_cmp_retry < COUNT_PBS_COMP_RETRY_NUM;
pbs_cmp_retry++) {
for (dq = 0; dq < DQ_NUM; dq++)
cmp_unlock_pup_dq_array[pbs_cmp_retry][dq] = *pcur_pup;
}
memset(&skew_array, 0, MAX_PUP_NUM * DQ_NUM * sizeof(u32));
DEBUG_PBS_FULL_S("DDR3 - PBS Per bit - Started\n");
/* The pbs value depends if rx or tx */
if (is_tx == 1) {
start_pbs = MIN_PBS;
last_pbs = MAX_PBS;
} else {
start_pbs = MAX_PBS;
last_pbs = MIN_PBS;
}
pbs_curr_val = start_pbs;
pup_locked = *pcur_pup;
/* Set current pup number */
if (pup_locked == 0x1) /* Ecc mode */
max_pup = 1;
else
max_pup = dram_info->num_of_std_pups;
do {
/* Increment/ decrement PBS for un-lock bits only */
if (is_tx == 1)
pbs_curr_val++;
else
pbs_curr_val--;
/* Set Current PBS delay */
for (dq = 0; dq < DQ_NUM; dq++) {
/* Check DQ bits to see if locked in all pups */
if (unlock_pup_dq_array[dq] == 0) {
DEBUG_PBS_FULL_S("DDR3 - PBS Per bit - All pups are locked for DQ ");
DEBUG_PBS_FULL_D(dq, 1);
DEBUG_PBS_FULL_S("\n");
continue;
}
for (pup = 0; pup < max_pup; pup++) {
int idx;
idx = pup * (1 - ecc) + ecc * ECC_PUP;
if (IS_PUP_ACTIVE(unlock_pup_dq_array[dq], pup)
== 0)
continue;
if (is_tx == 1)
ddr3_write_pup_reg(
PUP_PBS_TX + pbs_dq_mapping[idx][dq],
CS0, idx, 0, pbs_curr_val);
else
ddr3_write_pup_reg(
PUP_PBS_RX + pbs_dq_mapping[idx][dq],
CS0, idx, 0, pbs_curr_val);
}
}
/*
* Write Read and compare results - run the test
* DDR_PBS_COMP_RETRY_NUM times
*/
/* Run number of read and write to verify */
for (pbs_cmp_retry = 0;
pbs_cmp_retry < COUNT_PBS_COMP_RETRY_NUM;
pbs_cmp_retry++) {
if (MV_OK !=
ddr3_sdram_pbs_compare(dram_info, pup_locked, is_tx,
pbs_pattern_idx,
pbs_curr_val, start_pbs,
skew_array,
cmp_unlock_pup_dq_array
[pbs_cmp_retry], ecc))
return MV_FAIL;
for (pup = 0; pup < max_pup; pup++) {
for (dq = 0; dq < DQ_NUM; dq++) {
if ((IS_PUP_ACTIVE(unlock_pup_dq_array[dq],
pup) == 1)
&& (IS_PUP_ACTIVE(cmp_unlock_pup_dq_array
[pbs_cmp_retry][dq],
pup) == 0)) {
DEBUG_PBS_FULL_S("DDR3 - PBS Per bit - PbsCurrVal: ");
DEBUG_PBS_FULL_D(pbs_curr_val, 2);
DEBUG_PBS_FULL_S(" PUP: ");
DEBUG_PBS_FULL_D(pup, 1);
DEBUG_PBS_FULL_S(" DQ: ");
DEBUG_PBS_FULL_D(dq, 1);
DEBUG_PBS_FULL_S(" - failed\n");
}
}
}
for (dq = 0; dq < DQ_NUM; dq++) {
unlock_pup_dq_array[dq] &=
cmp_unlock_pup_dq_array[pbs_cmp_retry][dq];
}
}
pup_locked = 0;
sum_pup_fail = *pcur_pup;
/* Check which DQ is failed */
for (dq = 0; dq < DQ_NUM; dq++) {
/* Summarize the locked pup */
pup_locked |= unlock_pup_dq_array[dq];
/* Check if get fail */
sum_pup_fail &= unlock_pup_dq_array[dq];
}
/* If all PUPS are locked in all DQ - Break */
if (pup_locked == 0) {
/* All pups are locked */
*start_over = 0;
DEBUG_PBS_FULL_S("DDR3 - PBS Per bit - All bit in all pups are successfully locked\n");
break;
}
/* PBS deskew elements reach max ? */
if (pbs_curr_val == last_pbs) {
DEBUG_PBS_FULL_S("DDR3 - PBS Per bit - PBS deskew elements reach max\n");
/* CHIP-ONLY! - Implementation Limitation */
*start_over = (sum_pup_fail != 0) && (!(*start_over));
*pcur_pup = pup_locked;
DEBUG_PBS_FULL_S("DDR3 - PBS Per bit - StartOver: ");
DEBUG_PBS_FULL_D(*start_over, 1);
DEBUG_PBS_FULL_S(" pup_locked: ");
DEBUG_PBS_FULL_D(pup_locked, 2);
DEBUG_PBS_FULL_S(" sum_pup_fail: ");
DEBUG_PBS_FULL_D(sum_pup_fail, 2);
DEBUG_PBS_FULL_S("\n");
/* Lock PBS value for all remaining bits */
for (pup = 0; pup < max_pup; pup++) {
/* Check if current pup already received error */
if (IS_PUP_ACTIVE(pup_locked, pup) == 1) {
/* Valid pup for current function */
if (IS_PUP_ACTIVE(sum_pup_fail, pup) ==
1 && (*start_over == 1)) {
DEBUG_PBS_FULL_C("DDR3 - PBS Per bit - skipping lock of pup (first loop of pbs)",
pup, 1);
continue;
} else
if (IS_PUP_ACTIVE(sum_pup_fail, pup)
== 1) {
DEBUG_PBS_FULL_C("DDR3 - PBS Per bit - Locking pup %d (even though it wasn't supposed to be locked)",
pup, 1);
}
/* Already got fail on the PUP */
/* Lock PBS value for all remaining bits */
DEBUG_PBS_FULL_S("DDR3 - PBS Per bit - Locking remaning DQs for pup - ");
DEBUG_PBS_FULL_D(pup, 1);
DEBUG_PBS_FULL_S(": ");
for (dq = 0; dq < DQ_NUM; dq++) {
if (IS_PUP_ACTIVE
(unlock_pup_dq_array[dq],
pup) == 1) {
DEBUG_PBS_FULL_D(dq, 1);
DEBUG_PBS_FULL_S(",");
/* set current PBS */
skew_array[((pup) *
DQ_NUM) +
dq] =
pbs_curr_val;
}
}
if (*start_over == 1) {
/*
* Reset this pup bit - when
* restart the PBS, ignore this
* pup
*/
*pcur_pup &= ~(1 << pup);
}
DEBUG_PBS_FULL_S("\n");
} else {
DEBUG_PBS_FULL_S("DDR3 - PBS Per bit - Pup ");
DEBUG_PBS_FULL_D(pup, 1);
DEBUG_PBS_FULL_C(" is not set in puplocked - ",
pup_locked, 1);
}
}
/* Need to start the PBS again */
if (*start_over == 1) {
DEBUG_PBS_FULL_S("DDR3 - PBS Per bit - false fail - returning to start\n");
return MV_OK;
}
break;
}
/* Diff Check */
for (pup = 0; pup < max_pup; pup++) {
if (IS_PUP_ACTIVE(pup_locked, pup) == 1) {
/* pup is not locked */
if (first_failed[pup] == 0) {
/* No first fail until now */
if (IS_PUP_ACTIVE(sum_pup_fail, pup) ==
0) {
/* Get first fail */
DEBUG_PBS_FULL_C("DDR3 - PBS Per bit - First fail in pup ",
pup, 1);
first_failed[pup] = 1;
first_fail[pup] = pbs_curr_val;
}
} else {
/* Already got first fail */
if (is_tx == 1) {
/* TX - inc pbs */
calc_pbs_diff = pbs_curr_val -
first_fail[pup];
} else {
/* RX - dec pbs */
calc_pbs_diff = first_fail[pup] -
pbs_curr_val;
}
if (calc_pbs_diff >= PBS_DIFF_LIMIT) {
lock_pups(pup, &pup_locked,
unlock_pup_dq_array,
pbs_curr_val,
start_pbs, ecc, is_tx);
}
}
}
}
} while (1);
return MV_OK;
}
/*
* Name: ddr3_set_pbs_results
* Desc: Set to HW the PBS phase results.
* Args: is_tx Indicates whether to set Tx or RX results
* Notes:
* Returns: MV_OK if success, other error code if fail.
*/
static int ddr3_set_pbs_results(MV_DRAM_INFO *dram_info, int is_tx)
{
u32 pup, phys_pup, dq;
u32 max_pup; /* number of valid pups */
u32 pbs_min; /* minimal pbs val per pup */
u32 pbs_max; /* maximum pbs val per pup */
u32 val[9];
max_pup = dram_info->num_of_total_pups;
DEBUG_PBS_FULL_S("DDR3 - PBS - ddr3_set_pbs_results:\n");
/* Loop for all dqs & pups */
for (pup = 0; pup < max_pup; pup++) {
if (pup == (max_pup - 1) && dram_info->ecc_ena)
phys_pup = ECC_PUP;
else
phys_pup = pup;
/*
* To minimize delay elements, inc from pbs value the min
* pbs val
*/
pbs_min = MAX_PBS;
pbs_max = 0;
for (dq = 0; dq < DQ_NUM; dq++) {
if (pbs_min > skew_array[(pup * DQ_NUM) + dq])
pbs_min = skew_array[(pup * DQ_NUM) + dq];
if (pbs_max < skew_array[(pup * DQ_NUM) + dq])
pbs_max = skew_array[(pup * DQ_NUM) + dq];
}
pbs_max -= pbs_min;
DEBUG_PBS_FULL_S("DDR3 - PBS - PUP");
DEBUG_PBS_FULL_D(phys_pup, 1);
DEBUG_PBS_FULL_S(": Min Val = ");
DEBUG_PBS_FULL_D(pbs_min, 2);
DEBUG_PBS_FULL_C(", Max Val = ", pbs_max, 2);
val[pup] = 0;
for (dq = 0; dq < DQ_NUM; dq++) {
int idx;
int offs;
/* Set skew value for all dq */
/*
* Bit# Deskew <- Bit# Deskew - last / first
* failing bit Deskew For all bits (per PUP)
* (minimize delay elements)
*/
DEBUG_PBS_FULL_S("DQ");
DEBUG_PBS_FULL_D(dq, 1);
DEBUG_PBS_FULL_S("-");
DEBUG_PBS_FULL_D((skew_array[(pup * DQ_NUM) + dq] -
pbs_min), 2);
DEBUG_PBS_FULL_S(", ");
idx = (pup * DQ_NUM) + dq;
if (is_tx == 1)
offs = PUP_PBS_TX;
else
offs = PUP_PBS_RX;
ddr3_write_pup_reg(offs + pbs_dq_mapping[phys_pup][dq],
CS0, phys_pup, 0,
skew_array[idx] - pbs_min);
if (is_tx == 1)
val[pup] += skew_array[idx] - pbs_min;
}
DEBUG_PBS_FULL_S("\n");
/* Set the DQS the half of the Max PBS of the DQs */
if (is_tx == 1) {
ddr3_write_pup_reg(PUP_PBS_TX + 8, CS0, phys_pup, 0,
pbs_max / 2);
ddr3_write_pup_reg(PUP_PBS_TX + 0xa, CS0, phys_pup, 0,
val[pup] / 8);
} else
ddr3_write_pup_reg(PUP_PBS_RX + 8, CS0, phys_pup, 0,
pbs_max / 2);
}
return MV_OK;
}
static void ddr3_pbs_write_pup_dqs_reg(u32 cs, u32 pup, u32 dqs_delay)
{
u32 reg, delay;
reg = (ddr3_read_pup_reg(PUP_WL_MODE, cs, pup) & 0x3FF);
delay = reg & PUP_DELAY_MASK;
reg |= ((dqs_delay + delay) << REG_PHY_DQS_REF_DLY_OFFS);
reg |= REG_PHY_REGISTRY_FILE_ACCESS_OP_WR;
reg |= (pup << REG_PHY_PUP_OFFS);
reg |= ((0x4 * cs + PUP_WL_MODE) << REG_PHY_CS_OFFS);
reg_write(REG_PHY_REGISTRY_FILE_ACCESS_ADDR, reg); /* 0x16A0 */
do {
reg = reg_read(REG_PHY_REGISTRY_FILE_ACCESS_ADDR) &
REG_PHY_REGISTRY_FILE_ACCESS_OP_DONE;
} while (reg); /* Wait for '0' to mark the end of the transaction */
udelay(10);
}
/*
* Set training patterns
*/
int ddr3_load_pbs_patterns(MV_DRAM_INFO *dram_info)
{
u32 cs, cs_count, cs_tmp;
u32 sdram_addr;
u32 *pattern_ptr0, *pattern_ptr1;
/* Choose pattern */
switch (dram_info->ddr_width) {
#if defined(MV88F672X)
case 16:
pattern_ptr0 = (u32 *)&pbs_pattern[0];
pattern_ptr1 = (u32 *)&pbs_pattern[1];
break;
#endif
case 32:
pattern_ptr0 = (u32 *)&pbs_pattern_32b[0];
pattern_ptr1 = (u32 *)&pbs_pattern_32b[1];
break;
#if defined(MV88F78X60)
case 64:
pattern_ptr0 = (u32 *)&pbs_pattern_64b[0];
pattern_ptr1 = (u32 *)&pbs_pattern_64b[1];
break;
#endif
default:
return MV_FAIL;
}
/* Loop for each CS */
for (cs = 0; cs < MAX_CS; cs++) {
if (dram_info->cs_ena & (1 << cs)) {
cs_count = 0;
for (cs_tmp = 0; cs_tmp < cs; cs_tmp++) {
if (dram_info->cs_ena & (1 << cs_tmp))
cs_count++;
}
/* Init PBS I pattern */
sdram_addr = (cs_count * (SDRAM_CS_SIZE + 1) +
SDRAM_PBS_I_OFFS);
if (MV_OK !=
ddr3_sdram_compare(dram_info, (u32) NULL, NULL,
pattern_ptr0, LEN_STD_PATTERN,
sdram_addr, 1, 0, NULL,
0))
return MV_FAIL;
/* Init PBS II pattern */
sdram_addr = (cs_count * (SDRAM_CS_SIZE + 1) +
SDRAM_PBS_II_OFFS);
if (MV_OK !=
ddr3_sdram_compare(dram_info, (u32) NULL, NULL,
pattern_ptr1, LEN_STD_PATTERN,
sdram_addr, 1, 0, NULL,
0))
return MV_FAIL;
}
}
return MV_OK;
}
#endif
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