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u-boot/drivers/ddr/marvell/axp/ddr3_hw_training.c
Tom Rini 83d290c56f SPDX: Convert all of our single license tags to Linux Kernel style 
When U-Boot started using SPDX tags we were among the early adopters and
there weren't a lot of other examples to borrow from.  So we picked the
area of the file that usually had a full license text and replaced it
with an appropriate SPDX-License-Identifier: entry.  Since then, the
Linux Kernel has adopted SPDX tags and they place it as the very first
line in a file (except where shebangs are used, then it's second line)
and with slightly different comment styles than us.

In part due to community overlap, in part due to better tag visibility
and in part for other minor reasons, switch over to that style.

This commit changes all instances where we have a single declared
license in the tag as both the before and after are identical in tag
contents.  There's also a few places where I found we did not have a tag
and have introduced one.

Signed-off-by: Tom Rini <trini@konsulko.com>
2018-05-07 09:34:12 -04:00

1114 lines
28 KiB
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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 "ddr3_init.h"
#include "ddr3_hw_training.h"
#include "xor.h"
#ifdef MV88F78X60
#include "ddr3_patterns_64bit.h"
#else
#include "ddr3_patterns_16bit.h"
#if defined(MV88F672X)
#include "ddr3_patterns_16bit.h"
#endif
#endif
/*
* Debug
*/
#define DEBUG_MAIN_C(s, d, l) \
DEBUG_MAIN_S(s); DEBUG_MAIN_D(d, l); DEBUG_MAIN_S("\n")
#define DEBUG_MAIN_FULL_C(s, d, l) \
DEBUG_MAIN_FULL_S(s); DEBUG_MAIN_FULL_D(d, l); DEBUG_MAIN_FULL_S("\n")
#ifdef MV_DEBUG_MAIN
#define DEBUG_MAIN_S(s) puts(s)
#define DEBUG_MAIN_D(d, l) printf("%x", d)
#else
#define DEBUG_MAIN_S(s)
#define DEBUG_MAIN_D(d, l)
#endif
#ifdef MV_DEBUG_MAIN_FULL
#define DEBUG_MAIN_FULL_S(s) puts(s)
#define DEBUG_MAIN_FULL_D(d, l) printf("%x", d)
#else
#define DEBUG_MAIN_FULL_S(s)
#define DEBUG_MAIN_FULL_D(d, l)
#endif
#ifdef MV_DEBUG_SUSPEND_RESUME
#define DEBUG_SUSPEND_RESUME_S(s) puts(s)
#define DEBUG_SUSPEND_RESUME_D(d, l) printf("%x", d)
#else
#define DEBUG_SUSPEND_RESUME_S(s)
#define DEBUG_SUSPEND_RESUME_D(d, l)
#endif
static u32 ddr3_sw_wl_rl_debug;
static u32 ddr3_run_pbs = 1;
void ddr3_print_version(void)
{
puts("DDR3 Training Sequence - Ver 5.7.");
}
void ddr3_set_sw_wl_rl_debug(u32 val)
{
ddr3_sw_wl_rl_debug = val;
}
void ddr3_set_pbs(u32 val)
{
ddr3_run_pbs = val;
}
int ddr3_hw_training(u32 target_freq, u32 ddr_width, int xor_bypass,
u32 scrub_offs, u32 scrub_size, int dqs_clk_aligned,
int debug_mode, int reg_dimm_skip_wl)
{
/* A370 has no PBS mechanism */
__maybe_unused u32 first_loop_flag = 0;
u32 freq, reg;
MV_DRAM_INFO dram_info;
int ratio_2to1 = 0;
int tmp_ratio = 1;
int status;
if (debug_mode)
DEBUG_MAIN_S("DDR3 Training Sequence - DEBUG - 1\n");
memset(&dram_info, 0, sizeof(dram_info));
dram_info.num_cs = ddr3_get_cs_num_from_reg();
dram_info.cs_ena = ddr3_get_cs_ena_from_reg();
dram_info.target_frequency = target_freq;
dram_info.ddr_width = ddr_width;
dram_info.num_of_std_pups = ddr_width / PUP_SIZE;
dram_info.rl400_bug = 0;
dram_info.multi_cs_mr_support = 0;
#ifdef MV88F67XX
dram_info.rl400_bug = 1;
#endif
/* Ignore ECC errors - if ECC is enabled */
reg = reg_read(REG_SDRAM_CONFIG_ADDR);
if (reg & (1 << REG_SDRAM_CONFIG_ECC_OFFS)) {
dram_info.ecc_ena = 1;
reg |= (1 << REG_SDRAM_CONFIG_IERR_OFFS);
reg_write(REG_SDRAM_CONFIG_ADDR, reg);
} else {
dram_info.ecc_ena = 0;
}
reg = reg_read(REG_SDRAM_CONFIG_ADDR);
if (reg & (1 << REG_SDRAM_CONFIG_REGDIMM_OFFS))
dram_info.reg_dimm = 1;
else
dram_info.reg_dimm = 0;
dram_info.num_of_total_pups = ddr_width / PUP_SIZE + dram_info.ecc_ena;
/* Get target 2T value */
reg = reg_read(REG_DUNIT_CTRL_LOW_ADDR);
dram_info.mode_2t = (reg >> REG_DUNIT_CTRL_LOW_2T_OFFS) &
REG_DUNIT_CTRL_LOW_2T_MASK;
/* Get target CL value */
#ifdef MV88F67XX
reg = reg_read(REG_DDR3_MR0_ADDR) >> 2;
#else
reg = reg_read(REG_DDR3_MR0_CS_ADDR) >> 2;
#endif
reg = (((reg >> 1) & 0xE) | (reg & 0x1)) & 0xF;
dram_info.cl = ddr3_valid_cl_to_cl(reg);
/* Get target CWL value */
#ifdef MV88F67XX
reg = reg_read(REG_DDR3_MR2_ADDR) >> REG_DDR3_MR2_CWL_OFFS;
#else
reg = reg_read(REG_DDR3_MR2_CS_ADDR) >> REG_DDR3_MR2_CWL_OFFS;
#endif
reg &= REG_DDR3_MR2_CWL_MASK;
dram_info.cwl = reg;
#if !defined(MV88F67XX)
/* A370 has no PBS mechanism */
#if defined(MV88F78X60)
if ((dram_info.target_frequency > DDR_400) && (ddr3_run_pbs))
first_loop_flag = 1;
#else
/* first_loop_flag = 1; skip mid freq at ALP/A375 */
if ((dram_info.target_frequency > DDR_400) && (ddr3_run_pbs) &&
(mv_ctrl_revision_get() >= UMC_A0))
first_loop_flag = 1;
else
first_loop_flag = 0;
#endif
#endif
freq = dram_info.target_frequency;
/* Set ODT to always on */
ddr3_odt_activate(1);
/* Init XOR */
mv_sys_xor_init(&dram_info);
/* Get DRAM/HCLK ratio */
if (reg_read(REG_DDR_IO_ADDR) & (1 << REG_DDR_IO_CLK_RATIO_OFFS))
ratio_2to1 = 1;
/*
* Xor Bypass - ECC support in AXP is currently available for 1:1
* modes frequency modes.
* Not all frequency modes support the ddr3 training sequence
* (Only 1200/300).
* Xor Bypass allows using the Xor initializations and scrubbing
* inside the ddr3 training sequence without running the training
* itself.
*/
if (xor_bypass == 0) {
if (ddr3_run_pbs) {
DEBUG_MAIN_S("DDR3 Training Sequence - Run with PBS.\n");
} else {
DEBUG_MAIN_S("DDR3 Training Sequence - Run without PBS.\n");
}
if (dram_info.target_frequency > DFS_MARGIN) {
tmp_ratio = 0;
freq = DDR_100;
if (dram_info.reg_dimm == 1)
freq = DDR_300;
if (MV_OK != ddr3_dfs_high_2_low(freq, &dram_info)) {
/* Set low - 100Mhz DDR Frequency by HW */
DEBUG_MAIN_S("DDR3 Training Sequence - FAILED (Dfs High2Low)\n");
return MV_DDR3_TRAINING_ERR_DFS_H2L;
}
if ((dram_info.reg_dimm == 1) &&
(reg_dimm_skip_wl == 0)) {
if (MV_OK !=
ddr3_write_leveling_hw_reg_dimm(freq,
&dram_info))
DEBUG_MAIN_S("DDR3 Training Sequence - Registered DIMM Low WL - SKIP\n");
}
if (ddr3_get_log_level() >= MV_LOG_LEVEL_1)
ddr3_print_freq(freq);
if (debug_mode)
DEBUG_MAIN_S("DDR3 Training Sequence - DEBUG - 2\n");
} else {
if (!dqs_clk_aligned) {
#ifdef MV88F67XX
/*
* If running training sequence without DFS,
* we must run Write leveling before writing
* the patterns
*/
/*
* ODT - Multi CS system use SW WL,
* Single CS System use HW WL
*/
if (dram_info.cs_ena > 1) {
if (MV_OK !=
ddr3_write_leveling_sw(
freq, tmp_ratio,
&dram_info)) {
DEBUG_MAIN_S("DDR3 Training Sequence - FAILED (Write Leveling Sw)\n");
return MV_DDR3_TRAINING_ERR_WR_LVL_SW;
}
} else {
if (MV_OK !=
ddr3_write_leveling_hw(freq,
&dram_info)) {
DEBUG_MAIN_S("DDR3 Training Sequence - FAILED (Write Leveling Hw)\n");
return MV_DDR3_TRAINING_ERR_WR_LVL_HW;
}
}
#else
if (MV_OK != ddr3_write_leveling_hw(
freq, &dram_info)) {
DEBUG_MAIN_S("DDR3 Training Sequence - FAILED (Write Leveling Hw)\n");
if (ddr3_sw_wl_rl_debug) {
if (MV_OK !=
ddr3_write_leveling_sw(
freq, tmp_ratio,
&dram_info)) {
DEBUG_MAIN_S("DDR3 Training Sequence - FAILED (Write Leveling Sw)\n");
return MV_DDR3_TRAINING_ERR_WR_LVL_SW;
}
} else {
return MV_DDR3_TRAINING_ERR_WR_LVL_HW;
}
}
#endif
}
if (debug_mode)
DEBUG_MAIN_S("DDR3 Training Sequence - DEBUG - 3\n");
}
if (MV_OK != ddr3_load_patterns(&dram_info, 0)) {
DEBUG_MAIN_S("DDR3 Training Sequence - FAILED (Loading Patterns)\n");
return MV_DDR3_TRAINING_ERR_LOAD_PATTERNS;
}
/*
* TODO:
* The mainline U-Boot port of the bin_hdr DDR training code
* needs a delay of minimum 20ms here (10ms is a bit too short
* and the CPU hangs). The bin_hdr code doesn't have this delay.
* To be save here, lets add a delay of 50ms here.
*
* Tested on the Marvell DB-MV784MP-GP board
*/
mdelay(50);
do {
freq = dram_info.target_frequency;
tmp_ratio = ratio_2to1;
DEBUG_MAIN_FULL_S("DDR3 Training Sequence - DEBUG - 4\n");
#if defined(MV88F78X60)
/*
* There is a difference on the DFS frequency at the
* first iteration of this loop
*/
if (first_loop_flag) {
freq = DDR_400;
tmp_ratio = 0;
}
#endif
if (MV_OK != ddr3_dfs_low_2_high(freq, tmp_ratio,
&dram_info)) {
DEBUG_MAIN_S("DDR3 Training Sequence - FAILED (Dfs Low2High)\n");
return MV_DDR3_TRAINING_ERR_DFS_H2L;
}
if (ddr3_get_log_level() >= MV_LOG_LEVEL_1) {
ddr3_print_freq(freq);
}
if (debug_mode)
DEBUG_MAIN_S("DDR3 Training Sequence - DEBUG - 5\n");
/* Write leveling */
if (!dqs_clk_aligned) {
#ifdef MV88F67XX
/*
* ODT - Multi CS system that not support Multi
* CS MRS commands must use SW WL
*/
if (dram_info.cs_ena > 1) {
if (MV_OK != ddr3_write_leveling_sw(
freq, tmp_ratio, &dram_info)) {
DEBUG_MAIN_S("DDR3 Training Sequence - FAILED (Write Leveling Sw)\n");
return MV_DDR3_TRAINING_ERR_WR_LVL_SW;
}
} else {
if (MV_OK != ddr3_write_leveling_hw(
freq, &dram_info)) {
DEBUG_MAIN_S("DDR3 Training Sequence - FAILED (Write Leveling Hw)\n");
return MV_DDR3_TRAINING_ERR_WR_LVL_HW;
}
}
#else
if ((dram_info.reg_dimm == 1) &&
(freq == DDR_400)) {
if (reg_dimm_skip_wl == 0) {
if (MV_OK != ddr3_write_leveling_hw_reg_dimm(
freq, &dram_info))
DEBUG_MAIN_S("DDR3 Training Sequence - Registered DIMM WL - SKIP\n");
}
} else {
if (MV_OK != ddr3_write_leveling_hw(
freq, &dram_info)) {
DEBUG_MAIN_S("DDR3 Training Sequence - FAILED (Write Leveling Hw)\n");
if (ddr3_sw_wl_rl_debug) {
if (MV_OK != ddr3_write_leveling_sw(
freq, tmp_ratio, &dram_info)) {
DEBUG_MAIN_S("DDR3 Training Sequence - FAILED (Write Leveling Sw)\n");
return MV_DDR3_TRAINING_ERR_WR_LVL_SW;
}
} else {
return MV_DDR3_TRAINING_ERR_WR_LVL_HW;
}
}
}
#endif
if (debug_mode)
DEBUG_MAIN_S
("DDR3 Training Sequence - DEBUG - 6\n");
}
/* Read Leveling */
/*
* Armada 370 - Support for HCLK @ 400MHZ - must use
* SW read leveling
*/
if (freq == DDR_400 && dram_info.rl400_bug) {
status = ddr3_read_leveling_sw(freq, tmp_ratio,
&dram_info);
if (MV_OK != status) {
DEBUG_MAIN_S
("DDR3 Training Sequence - FAILED (Read Leveling Sw)\n");
return status;
}
} else {
if (MV_OK != ddr3_read_leveling_hw(
freq, &dram_info)) {
DEBUG_MAIN_S("DDR3 Training Sequence - FAILED (Read Leveling Hw)\n");
if (ddr3_sw_wl_rl_debug) {
if (MV_OK != ddr3_read_leveling_sw(
freq, tmp_ratio,
&dram_info)) {
DEBUG_MAIN_S("DDR3 Training Sequence - FAILED (Read Leveling Sw)\n");
return MV_DDR3_TRAINING_ERR_WR_LVL_SW;
}
} else {
return MV_DDR3_TRAINING_ERR_WR_LVL_HW;
}
}
}
if (debug_mode)
DEBUG_MAIN_S("DDR3 Training Sequence - DEBUG - 7\n");
if (MV_OK != ddr3_wl_supplement(&dram_info)) {
DEBUG_MAIN_S("DDR3 Training Sequence - FAILED (Write Leveling Hi-Freq Sup)\n");
return MV_DDR3_TRAINING_ERR_WR_LVL_HI_FREQ;
}
if (debug_mode)
DEBUG_MAIN_S("DDR3 Training Sequence - DEBUG - 8\n");
#if !defined(MV88F67XX)
/* A370 has no PBS mechanism */
#if defined(MV88F78X60) || defined(MV88F672X)
if (first_loop_flag == 1) {
first_loop_flag = 0;
status = MV_OK;
status = ddr3_pbs_rx(&dram_info);
if (MV_OK != status) {
DEBUG_MAIN_S("DDR3 Training Sequence - FAILED (PBS RX)\n");
return status;
}
if (debug_mode)
DEBUG_MAIN_S("DDR3 Training Sequence - DEBUG - 9\n");
status = ddr3_pbs_tx(&dram_info);
if (MV_OK != status) {
DEBUG_MAIN_S("DDR3 Training Sequence - FAILED (PBS TX)\n");
return status;
}
if (debug_mode)
DEBUG_MAIN_S("DDR3 Training Sequence - DEBUG - 10\n");
}
#endif
#endif
} while (freq != dram_info.target_frequency);
status = ddr3_dqs_centralization_rx(&dram_info);
if (MV_OK != status) {
DEBUG_MAIN_S("DDR3 Training Sequence - FAILED (DQS Centralization RX)\n");
return status;
}
if (debug_mode)
DEBUG_MAIN_S("DDR3 Training Sequence - DEBUG - 11\n");
status = ddr3_dqs_centralization_tx(&dram_info);
if (MV_OK != status) {
DEBUG_MAIN_S("DDR3 Training Sequence - FAILED (DQS Centralization TX)\n");
return status;
}
if (debug_mode)
DEBUG_MAIN_S("DDR3 Training Sequence - DEBUG - 12\n");
}
ddr3_set_performance_params(&dram_info);
if (dram_info.ecc_ena) {
/* Need to SCRUB the DRAM memory area to load U-Boot */
mv_sys_xor_finish();
dram_info.num_cs = 1;
dram_info.cs_ena = 1;
mv_sys_xor_init(&dram_info);
mv_xor_mem_init(0, scrub_offs, scrub_size, 0xdeadbeef,
0xdeadbeef);
/* Wait for previous transfer completion */
while (mv_xor_state_get(0) != MV_IDLE)
;
if (debug_mode)
DEBUG_MAIN_S("DDR3 Training Sequence - DEBUG - 13\n");
}
/* Return XOR State */
mv_sys_xor_finish();
#if defined(MV88F78X60)
/* Save training results in memeory for resume state */
ddr3_save_training(&dram_info);
#endif
/* Clear ODT always on */
ddr3_odt_activate(0);
/* Configure Dynamic read ODT */
ddr3_odt_read_dynamic_config(&dram_info);
return MV_OK;
}
void ddr3_set_performance_params(MV_DRAM_INFO *dram_info)
{
u32 twr2wr, trd2rd, trd2wr_wr2rd;
u32 tmp1, tmp2, reg;
DEBUG_MAIN_FULL_C("Max WL Phase: ", dram_info->wl_max_phase, 2);
DEBUG_MAIN_FULL_C("Min WL Phase: ", dram_info->wl_min_phase, 2);
DEBUG_MAIN_FULL_C("Max RL Phase: ", dram_info->rl_max_phase, 2);
DEBUG_MAIN_FULL_C("Min RL Phase: ", dram_info->rl_min_phase, 2);
if (dram_info->wl_max_phase < 2)
twr2wr = 0x2;
else
twr2wr = 0x3;
trd2rd = 0x1 + (dram_info->rl_max_phase + 1) / 2 +
(dram_info->rl_max_phase + 1) % 2;
tmp1 = (dram_info->rl_max_phase - dram_info->wl_min_phase) / 2 +
(((dram_info->rl_max_phase - dram_info->wl_min_phase) % 2) >
0 ? 1 : 0);
tmp2 = (dram_info->wl_max_phase - dram_info->rl_min_phase) / 2 +
((dram_info->wl_max_phase - dram_info->rl_min_phase) % 2 >
0 ? 1 : 0);
trd2wr_wr2rd = (tmp1 >= tmp2) ? tmp1 : tmp2;
trd2wr_wr2rd += 2;
trd2rd += 2;
twr2wr += 2;
DEBUG_MAIN_FULL_C("WR 2 WR: ", twr2wr, 2);
DEBUG_MAIN_FULL_C("RD 2 RD: ", trd2rd, 2);
DEBUG_MAIN_FULL_C("RD 2 WR / WR 2 RD: ", trd2wr_wr2rd, 2);
reg = reg_read(REG_SDRAM_TIMING_HIGH_ADDR);
reg &= ~(REG_SDRAM_TIMING_H_W2W_MASK << REG_SDRAM_TIMING_H_W2W_OFFS);
reg |= ((twr2wr & REG_SDRAM_TIMING_H_W2W_MASK) <<
REG_SDRAM_TIMING_H_W2W_OFFS);
reg &= ~(REG_SDRAM_TIMING_H_R2R_MASK << REG_SDRAM_TIMING_H_R2R_OFFS);
reg &= ~(REG_SDRAM_TIMING_H_R2R_H_MASK <<
REG_SDRAM_TIMING_H_R2R_H_OFFS);
reg |= ((trd2rd & REG_SDRAM_TIMING_H_R2R_MASK) <<
REG_SDRAM_TIMING_H_R2R_OFFS);
reg |= (((trd2rd >> 2) & REG_SDRAM_TIMING_H_R2R_H_MASK) <<
REG_SDRAM_TIMING_H_R2R_H_OFFS);
reg &= ~(REG_SDRAM_TIMING_H_R2W_W2R_MASK <<
REG_SDRAM_TIMING_H_R2W_W2R_OFFS);
reg &= ~(REG_SDRAM_TIMING_H_R2W_W2R_H_MASK <<
REG_SDRAM_TIMING_H_R2W_W2R_H_OFFS);
reg |= ((trd2wr_wr2rd & REG_SDRAM_TIMING_H_R2W_W2R_MASK) <<
REG_SDRAM_TIMING_H_R2W_W2R_OFFS);
reg |= (((trd2wr_wr2rd >> 2) & REG_SDRAM_TIMING_H_R2W_W2R_H_MASK) <<
REG_SDRAM_TIMING_H_R2W_W2R_H_OFFS);
reg_write(REG_SDRAM_TIMING_HIGH_ADDR, reg);
}
/*
* Perform DDR3 PUP Indirect Write
*/
void ddr3_write_pup_reg(u32 mode, u32 cs, u32 pup, u32 phase, u32 delay)
{
u32 reg = 0;
if (pup == PUP_BC)
reg |= (1 << REG_PHY_BC_OFFS);
else
reg |= (pup << REG_PHY_PUP_OFFS);
reg |= ((0x4 * cs + mode) << REG_PHY_CS_OFFS);
reg |= (phase << REG_PHY_PHASE_OFFS) | delay;
if (mode == PUP_WL_MODE)
reg |= ((INIT_WL_DELAY + delay) << REG_PHY_DQS_REF_DLY_OFFS);
reg_write(REG_PHY_REGISTRY_FILE_ACCESS_ADDR, reg); /* 0x16A0 */
reg |= REG_PHY_REGISTRY_FILE_ACCESS_OP_WR;
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 */
/* If read Leveling mode - need to write to register 3 separetly */
if (mode == PUP_RL_MODE) {
reg = 0;
if (pup == PUP_BC)
reg |= (1 << REG_PHY_BC_OFFS);
else
reg |= (pup << REG_PHY_PUP_OFFS);
reg |= ((0x4 * cs + mode + 1) << REG_PHY_CS_OFFS);
reg |= (INIT_RL_DELAY);
reg_write(REG_PHY_REGISTRY_FILE_ACCESS_ADDR, reg); /* 0x16A0 */
reg |= REG_PHY_REGISTRY_FILE_ACCESS_OP_WR;
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);
}
}
/*
* Perform DDR3 PUP Indirect Read
*/
u32 ddr3_read_pup_reg(u32 mode, u32 cs, u32 pup)
{
u32 reg;
reg = (pup << REG_PHY_PUP_OFFS) |
((0x4 * cs + mode) << REG_PHY_CS_OFFS);
reg_write(REG_PHY_REGISTRY_FILE_ACCESS_ADDR, reg); /* 0x16A0 */
reg |= REG_PHY_REGISTRY_FILE_ACCESS_OP_RD;
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 */
return reg_read(REG_PHY_REGISTRY_FILE_ACCESS_ADDR); /* 0x16A0 */
}
/*
* Set training patterns
*/
int ddr3_load_patterns(MV_DRAM_INFO *dram_info, int resume)
{
u32 reg;
/* Enable SW override - Required for the ECC Pup */
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);
reg = (1 << REG_DRAM_TRAINING_AUTO_OFFS);
reg_write(REG_DRAM_TRAINING_ADDR, reg); /* 0x15B0 - Training Register */
if (resume == 0) {
#if defined(MV88F78X60) || defined(MV88F672X)
ddr3_load_pbs_patterns(dram_info);
#endif
ddr3_load_dqs_patterns(dram_info);
}
/* 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);
/* Set Base Addr */
#if defined(MV88F67XX)
reg_write(REG_DRAM_TRAINING_PATTERN_BASE_ADDR, 0);
#else
if (resume == 0)
reg_write(REG_DRAM_TRAINING_PATTERN_BASE_ADDR, 0);
else
reg_write(REG_DRAM_TRAINING_PATTERN_BASE_ADDR,
RESUME_RL_PATTERNS_ADDR);
#endif
/* Set Patterns */
if (resume == 0) {
reg = (dram_info->cs_ena << REG_DRAM_TRAINING_CS_OFFS) |
(1 << REG_DRAM_TRAINING_PATTERNS_OFFS);
} else {
reg = (0x1 << REG_DRAM_TRAINING_CS_OFFS) |
(1 << REG_DRAM_TRAINING_PATTERNS_OFFS);
}
reg |= (1 << REG_DRAM_TRAINING_AUTO_OFFS);
reg_write(REG_DRAM_TRAINING_ADDR, reg);
udelay(100);
/* Check if Successful */
if (reg_read(REG_DRAM_TRAINING_ADDR) &
(1 << REG_DRAM_TRAINING_ERROR_OFFS))
return MV_OK;
else
return MV_FAIL;
}
#if !defined(MV88F67XX)
/*
* Name: ddr3_save_training(MV_DRAM_INFO *dram_info)
* Desc: saves the training results to memeory (RL,WL,PBS,Rx/Tx
* Centeralization)
* Args: MV_DRAM_INFO *dram_info
* Notes:
* Returns: None.
*/
void ddr3_save_training(MV_DRAM_INFO *dram_info)
{
u32 val, pup, tmp_cs, cs, i, dq;
u32 crc = 0;
u32 regs = 0;
u32 *sdram_offset = (u32 *)RESUME_TRAINING_VALUES_ADDR;
u32 mode_config[MAX_TRAINING_MODE];
mode_config[DQS_WR_MODE] = PUP_DQS_WR;
mode_config[WL_MODE_] = PUP_WL_MODE;
mode_config[RL_MODE_] = PUP_RL_MODE;
mode_config[DQS_RD_MODE] = PUP_DQS_RD;
mode_config[PBS_TX_DM_MODE] = PUP_PBS_TX_DM;
mode_config[PBS_TX_MODE] = PUP_PBS_TX;
mode_config[PBS_RX_MODE] = PUP_PBS_RX;
/* num of training modes */
for (i = 0; i < MAX_TRAINING_MODE; i++) {
tmp_cs = dram_info->cs_ena;
/* num of CS */
for (cs = 0; cs < MAX_CS; cs++) {
if (tmp_cs & (1 << cs)) {
/* num of PUPs */
for (pup = 0; pup < dram_info->num_of_total_pups;
pup++) {
if (pup == dram_info->num_of_std_pups &&
dram_info->ecc_ena)
pup = ECC_PUP;
if (i == PBS_TX_DM_MODE) {
/*
* Change CS bitmask because
* PBS works only with CS0
*/
tmp_cs = 0x1;
val = ddr3_read_pup_reg(
mode_config[i], CS0, pup);
} else if (i == PBS_TX_MODE ||
i == PBS_RX_MODE) {
/*
* Change CS bitmask because
* PBS works only with CS0
*/
tmp_cs = 0x1;
for (dq = 0; dq <= DQ_NUM;
dq++) {
val = ddr3_read_pup_reg(
mode_config[i] + dq,
CS0,
pup);
(*sdram_offset) = val;
crc += *sdram_offset;
sdram_offset++;
regs++;
}
continue;
} else {
val = ddr3_read_pup_reg(
mode_config[i], cs, pup);
}
*sdram_offset = val;
crc += *sdram_offset;
sdram_offset++;
regs++;
}
}
}
}
*sdram_offset = reg_read(REG_READ_DATA_SAMPLE_DELAYS_ADDR);
crc += *sdram_offset;
sdram_offset++;
regs++;
*sdram_offset = reg_read(REG_READ_DATA_READY_DELAYS_ADDR);
crc += *sdram_offset;
sdram_offset++;
regs++;
sdram_offset = (u32 *)NUM_OF_REGISTER_ADDR;
*sdram_offset = regs;
DEBUG_SUSPEND_RESUME_S("Training Results CheckSum write= ");
DEBUG_SUSPEND_RESUME_D(crc, 8);
DEBUG_SUSPEND_RESUME_S("\n");
sdram_offset = (u32 *)CHECKSUM_RESULT_ADDR;
*sdram_offset = crc;
}
/*
* Name: ddr3_read_training_results()
* Desc: Reads the training results from memeory (RL,WL,PBS,Rx/Tx
* Centeralization)
* and writes them to the relevant registers
* Args: MV_DRAM_INFO *dram_info
* Notes:
* Returns: None.
*/
int ddr3_read_training_results(void)
{
u32 val, reg, idx, dqs_wr_idx = 0, crc = 0;
u32 *sdram_offset = (u32 *)RESUME_TRAINING_VALUES_ADDR;
u32 training_val[RESUME_TRAINING_VALUES_MAX] = { 0 };
u32 regs = *((u32 *)NUM_OF_REGISTER_ADDR);
/*
* Read Training results & Dunit registers from memory and write
* it to an array
*/
for (idx = 0; idx < regs; idx++) {
training_val[idx] = *sdram_offset;
crc += *sdram_offset;
sdram_offset++;
}
sdram_offset = (u32 *)CHECKSUM_RESULT_ADDR;
if ((*sdram_offset) == crc) {
DEBUG_SUSPEND_RESUME_S("Training Results CheckSum read PASS= ");
DEBUG_SUSPEND_RESUME_D(crc, 8);
DEBUG_SUSPEND_RESUME_S("\n");
} else {
DEBUG_MAIN_S("Wrong Training Results CheckSum\n");
return MV_FAIL;
}
/*
* We iterate through all the registers except for the last 2 since
* they are Dunit registers (and not PHY registers)
*/
for (idx = 0; idx < (regs - 2); idx++) {
val = training_val[idx];
reg = (val >> REG_PHY_CS_OFFS) & 0x3F; /*read the phy address */
/* Check if the values belongs to the DQS WR */
if (reg == PUP_WL_MODE) {
/* bit[5:0] in DQS_WR are delay */
val = (training_val[dqs_wr_idx++] & 0x3F);
/*
* bit[15:10] are DQS_WR delay & bit[9:0] are
* WL phase & delay
*/
val = (val << REG_PHY_DQS_REF_DLY_OFFS) |
(training_val[idx] & 0x3C003FF);
/* Add Request pending and write operation bits */
val |= REG_PHY_REGISTRY_FILE_ACCESS_OP_WR;
} else if (reg == PUP_DQS_WR) {
/*
* Do nothing since DQS_WR will be done in PUP_WL_MODE
*/
continue;
}
val |= REG_PHY_REGISTRY_FILE_ACCESS_OP_WR;
reg_write(REG_PHY_REGISTRY_FILE_ACCESS_ADDR, val);
do {
val = (reg_read(REG_PHY_REGISTRY_FILE_ACCESS_ADDR)) &
REG_PHY_REGISTRY_FILE_ACCESS_OP_DONE;
} while (val); /* Wait for '0' to mark the end of the transaction */
}
/* write last 2 Dunit configurations */
val = training_val[idx];
reg_write(REG_READ_DATA_SAMPLE_DELAYS_ADDR, val); /* reg 0x1538 */
val = training_val[idx + 1];
reg_write(REG_READ_DATA_READY_DELAYS_ADDR, val); /* reg 0x153c */
return MV_OK;
}
/*
* Name: ddr3_check_if_resume_mode()
* Desc: Reads the address (0x3000) of the Resume Magic word (0xDEADB002)
* Args: MV_DRAM_INFO *dram_info
* Notes:
* Returns: return (magic_word == SUSPEND_MAGIC_WORD)
*/
int ddr3_check_if_resume_mode(MV_DRAM_INFO *dram_info, u32 freq)
{
u32 magic_word;
u32 *sdram_offset = (u32 *)BOOT_INFO_ADDR;
if (dram_info->reg_dimm != 1) {
/*
* Perform write levleling in order initiate the phy with
* low frequency
*/
if (MV_OK != ddr3_write_leveling_hw(freq, dram_info)) {
DEBUG_MAIN_S("DDR3 Training Sequence - FAILED (Write Leveling Hw)\n");
return MV_DDR3_TRAINING_ERR_WR_LVL_HW;
}
}
if (MV_OK != ddr3_load_patterns(dram_info, 1)) {
DEBUG_MAIN_S("DDR3 Training Sequence - FAILED (Loading Patterns)\n");
return MV_DDR3_TRAINING_ERR_LOAD_PATTERNS;
}
/* Enable CS0 only for RL */
dram_info->cs_ena = 0x1;
/* Perform Read levleling in order to get stable memory */
if (MV_OK != ddr3_read_leveling_hw(freq, dram_info)) {
DEBUG_MAIN_S("DDR3 Training Sequence - FAILED (Read Leveling Hw)\n");
return MV_DDR3_TRAINING_ERR_WR_LVL_HW;
}
/* Back to relevant CS */
dram_info->cs_ena = ddr3_get_cs_ena_from_reg();
magic_word = *sdram_offset;
return magic_word == SUSPEND_MAGIC_WORD;
}
/*
* Name: ddr3_training_suspend_resume()
* Desc: Execute the Resume state
* Args: MV_DRAM_INFO *dram_info
* Notes:
* Returns: return (magic_word == SUSPEND_MAGIC_WORD)
*/
int ddr3_training_suspend_resume(MV_DRAM_INFO *dram_info)
{
u32 freq, reg;
int tmp_ratio;
/* Configure DDR */
if (MV_OK != ddr3_read_training_results())
return MV_FAIL;
/* Reset read FIFO */
reg = reg_read(REG_DRAM_TRAINING_ADDR);
/* Start Auto Read Leveling procedure */
reg |= (1 << REG_DRAM_TRAINING_RL_OFFS);
reg_write(REG_DRAM_TRAINING_ADDR, reg); /* 0x15B0 - Training Register */
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);
udelay(2);
reg = reg_read(REG_DRAM_TRAINING_ADDR);
/* Clear Auto Read Leveling procedure */
reg &= ~(1 << REG_DRAM_TRAINING_RL_OFFS);
reg_write(REG_DRAM_TRAINING_ADDR, reg); /* 0x15B0 - Training Register */
/* Return to target frequency */
freq = dram_info->target_frequency;
tmp_ratio = 1;
if (MV_OK != ddr3_dfs_low_2_high(freq, tmp_ratio, dram_info)) {
DEBUG_MAIN_S("DDR3 Training Sequence - FAILED (Dfs Low2High)\n");
return MV_DDR3_TRAINING_ERR_DFS_H2L;
}
if (dram_info->ecc_ena) {
/* Scabbling the RL area pattern and the training area */
mv_sys_xor_finish();
dram_info->num_cs = 1;
dram_info->cs_ena = 1;
mv_sys_xor_init(dram_info);
mv_xor_mem_init(0, RESUME_RL_PATTERNS_ADDR,
RESUME_RL_PATTERNS_SIZE, 0xFFFFFFFF, 0xFFFFFFFF);
/* Wait for previous transfer completion */
while (mv_xor_state_get(0) != MV_IDLE)
;
/* Return XOR State */
mv_sys_xor_finish();
}
return MV_OK;
}
#endif
void ddr3_print_freq(u32 freq)
{
u32 tmp_freq;
switch (freq) {
case 0:
tmp_freq = 100;
break;
case 1:
tmp_freq = 300;
break;
case 2:
tmp_freq = 360;
break;
case 3:
tmp_freq = 400;
break;
case 4:
tmp_freq = 444;
break;
case 5:
tmp_freq = 500;
break;
case 6:
tmp_freq = 533;
break;
case 7:
tmp_freq = 600;
break;
case 8:
tmp_freq = 666;
break;
case 9:
tmp_freq = 720;
break;
case 10:
tmp_freq = 800;
break;
default:
tmp_freq = 100;
}
printf("Current frequency is: %dMHz\n", tmp_freq);
}
int ddr3_get_min_max_read_sample_delay(u32 cs_enable, u32 reg, u32 *min,
u32 *max, u32 *cs_max)
{
u32 cs, delay;
*min = 0xFFFFFFFF;
*max = 0x0;
for (cs = 0; cs < MAX_CS; cs++) {
if ((cs_enable & (1 << cs)) == 0)
continue;
delay = ((reg >> (cs * 8)) & 0x1F);
if (delay < *min)
*min = delay;
if (delay > *max) {
*max = delay;
*cs_max = cs;
}
}
return MV_OK;
}
int ddr3_get_min_max_rl_phase(MV_DRAM_INFO *dram_info, u32 *min, u32 *max,
u32 cs)
{
u32 pup, reg, phase;
*min = 0xFFFFFFFF;
*max = 0x0;
for (pup = 0; pup < dram_info->num_of_total_pups; pup++) {
reg = ddr3_read_pup_reg(PUP_RL_MODE, cs, pup);
phase = ((reg >> 8) & 0x7);
if (phase < *min)
*min = phase;
if (phase > *max)
*max = phase;
}
return MV_OK;
}
int ddr3_odt_activate(int activate)
{
u32 reg, mask;
mask = (1 << REG_DUNIT_ODT_CTRL_OVRD_OFFS) |
(1 << REG_DUNIT_ODT_CTRL_OVRD_VAL_OFFS);
/* {0x0000149C} - DDR Dunit ODT Control Register */
reg = reg_read(REG_DUNIT_ODT_CTRL_ADDR);
if (activate)
reg |= mask;
else
reg &= ~mask;
reg_write(REG_DUNIT_ODT_CTRL_ADDR, reg);
return MV_OK;
}
int ddr3_odt_read_dynamic_config(MV_DRAM_INFO *dram_info)
{
u32 min_read_sample_delay, max_read_sample_delay, max_rl_phase;
u32 min, max, cs_max;
u32 cs_ena, reg;
reg = reg_read(REG_READ_DATA_SAMPLE_DELAYS_ADDR);
cs_ena = ddr3_get_cs_ena_from_reg();
/* Get minimum and maximum of read sample delay of all CS */
ddr3_get_min_max_read_sample_delay(cs_ena, reg, &min_read_sample_delay,
&max_read_sample_delay, &cs_max);
/*
* Get minimum and maximum read leveling phase which belongs to the
* maximal read sample delay
*/
ddr3_get_min_max_rl_phase(dram_info, &min, &max, cs_max);
max_rl_phase = max;
/* DDR ODT Timing (Low) Register calculation */
reg = reg_read(REG_ODT_TIME_LOW_ADDR);
reg &= ~(0x1FF << REG_ODT_ON_CTL_RD_OFFS);
reg |= (((min_read_sample_delay - 1) & 0xF) << REG_ODT_ON_CTL_RD_OFFS);
reg |= (((max_read_sample_delay + 4 + (((max_rl_phase + 1) / 2) + 1)) &
0x1F) << REG_ODT_OFF_CTL_RD_OFFS);
reg_write(REG_ODT_TIME_LOW_ADDR, reg);
return MV_OK;
}
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